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Attempt to solve bug #17497 by minimizing cursor motion during TTY menu updates.
[bpt/emacs.git] / src / w32.c
CommitLineData
b46a6a83 1/* Utility and Unix shadow routines for GNU Emacs on the Microsoft Windows API.
1f41ee56 2
ba318903 3Copyright (C) 1994-1995, 2000-2014 Free Software Foundation, Inc.
95ed0025 4
3b7ad313
EN		 5This file is part of GNU Emacs.
6
9ec0b715 7GNU Emacs is free software: you can redistribute it and/or modify
3b7ad313 8it under the terms of the GNU General Public License as published by
9ec0b715
GM		 9the Free Software Foundation, either version 3 of the License, or
10(at your option) any later version.
3b7ad313
EN		 11
12GNU Emacs is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
9ec0b715 18along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
95ed0025 19
9ec0b715 20/*
95ed0025
RS		 21 Geoff Voelker (voelker@cs.washington.edu) 7-29-94
22*/
279066b2
EZ		 23
24#include <mingw_time.h>
76b3903d 25#include <stddef.h> /* for offsetof */
95ed0025
RS		 26#include <stdlib.h>
27#include <stdio.h>
ad9e2d54 28#include <float.h> /* for DBL_EPSILON */
95ed0025 29#include <io.h>
480b0c5b 30#include <errno.h>
95ed0025
RS		 31#include <fcntl.h>
32#include <ctype.h>
480b0c5b 33#include <signal.h>
b3308d2e 34#include <sys/file.h>
8f5e14c8 35#include <time.h> /* must be before nt/inc/sys/time.h, for MinGW64 */
480b0c5b 36#include <sys/time.h>
16bb7578 37#include <sys/utime.h>
7c80d5ec 38#include <math.h>
480b0c5b
GV		 39
40/* must include CRT headers *before* config.h */
4838e624 41
4838e624 42#include <config.h>
6ee4509a 43#include <mbstring.h> /* for _mbspbrk, _mbslwr, _mbsrchr, ... */
4838e624 44
480b0c5b
GV		 45#undef access
46#undef chdir
47#undef chmod
48#undef creat
49#undef ctime
50#undef fopen
51#undef link
52#undef mkdir
480b0c5b
GV		 53#undef open
54#undef rename
55#undef rmdir
56#undef unlink
57
58#undef close
59#undef dup
60#undef dup2
61#undef pipe
62#undef read
63#undef write
95ed0025 64
d8fcc1b9
AI		 65#undef strerror
66
97a93095
EZ		 67#undef localtime
68
95ed0025 69#include "lisp.h"
7d9fb4de 70#include "epaths.h" /* for SHELL */
95ed0025
RS		 71
72#include <pwd.h>
3d19b645 73#include <grp.h>
95ed0025 74
a18d7de6
EZ		 75/* MinGW64 (_W64) defines these in its _mingw.h. */
76#if defined(__GNUC__) && !defined(_W64)
971bce75
AI		 77#define _ANONYMOUS_UNION
78#define _ANONYMOUS_STRUCT
79#endif
480b0c5b 80#include <windows.h>
b8526f6e
EZ		 81/* Some versions of compiler define MEMORYSTATUSEX, some don't, so we
82 use a different name to avoid compilation problems. */
83typedef struct _MEMORY_STATUS_EX {
bedf4aab
JB		 84 DWORD dwLength;
85 DWORD dwMemoryLoad;
86 DWORDLONG ullTotalPhys;
87 DWORDLONG ullAvailPhys;
88 DWORDLONG ullTotalPageFile;
89 DWORDLONG ullAvailPageFile;
90 DWORDLONG ullTotalVirtual;
91 DWORDLONG ullAvailVirtual;
92 DWORDLONG ullAvailExtendedVirtual;
b8526f6e 93} MEMORY_STATUS_EX,*LPMEMORY_STATUS_EX;
7c80d5ec 94
55902276
EZ		 95/* These are here so that GDB would know about these data types. This
96 allows to attach GDB to Emacs when a fatal exception is triggered
97 and Windows pops up the "application needs to be closed" dialog.
98 At that point, _gnu_exception_handler, the top-level exception
99 handler installed by the MinGW startup code, is somewhere on the
100 call-stack of the main thread, so going to that call frame and
101 looking at the argument to _gnu_exception_handler, which is a
102 PEXCEPTION_POINTERS pointer, can reveal the exception code
103 (excptr->ExceptionRecord->ExceptionCode) and the address where the
104 exception happened (excptr->ExceptionRecord->ExceptionAddress), as
105 well as some additional information specific to the exception. */
106PEXCEPTION_POINTERS excptr;
107PEXCEPTION_RECORD excprec;
108PCONTEXT ctxrec;
109
634d3003 110#include <lmcons.h>
2d5324c5 111#include <shlobj.h>
00b3b7b3 112
7c80d5ec
EZ		 113#include <tlhelp32.h>
114#include <psapi.h>
a6fc3b5c 115#ifndef _MSC_VER
69e847be 116#include <w32api.h>
a6fc3b5c 117#endif
a18d7de6 118#if _WIN32_WINNT < 0x0500
5e617bc2 119#if !defined (__MINGW32__) || __W32API_MAJOR_VERSION < 3 || (__W32API_MAJOR_VERSION == 3 && __W32API_MINOR_VERSION < 15)
7c80d5ec 120/* This either is not in psapi.h or guarded by higher value of
a6d3e72e 121 _WIN32_WINNT than what we use. w32api supplied with MinGW 3.15
69e847be 122 defines it in psapi.h */
7c80d5ec 123typedef struct _PROCESS_MEMORY_COUNTERS_EX {
cb576b5c
FP		 124 DWORD cb;
125 DWORD PageFaultCount;
126 SIZE_T PeakWorkingSetSize;
127 SIZE_T WorkingSetSize;
128 SIZE_T QuotaPeakPagedPoolUsage;
129 SIZE_T QuotaPagedPoolUsage;
130 SIZE_T QuotaPeakNonPagedPoolUsage;
131 SIZE_T QuotaNonPagedPoolUsage;
132 SIZE_T PagefileUsage;
133 SIZE_T PeakPagefileUsage;
134 SIZE_T PrivateUsage;
7c80d5ec 135} PROCESS_MEMORY_COUNTERS_EX,*PPROCESS_MEMORY_COUNTERS_EX;
69e847be 136#endif
a18d7de6 137#endif
7c80d5ec 138
6dad7178
EZ		 139#include <winioctl.h>
140#include <aclapi.h>
66447e07
EZ		 141#include <sddl.h>
142
143#include <sys/acl.h>
ec4440cf 144#include <acl.h>
66447e07
EZ		 145
146/* This is not in MinGW's sddl.h (but they are in MSVC headers), so we
147 define them by hand if not already defined. */
148#ifndef SDDL_REVISION_1
149#define SDDL_REVISION_1 1
150#endif /* SDDL_REVISION_1 */
6dad7178 151
c6e72e17
EZ		 152#if defined(_MSC_VER) || defined(_W64)
153/* MSVC and MinGW64 don't provide the definition of
154 REPARSE_DATA_BUFFER and the associated macros, except on ntifs.h,
155 which cannot be included because it triggers conflicts with other
156 Windows API headers. So we define it here by hand. */
6dad7178
EZ		 157
158typedef struct _REPARSE_DATA_BUFFER {
159 ULONG ReparseTag;
160 USHORT ReparseDataLength;
161 USHORT Reserved;
162 union {
163 struct {
164 USHORT SubstituteNameOffset;
165 USHORT SubstituteNameLength;
166 USHORT PrintNameOffset;
167 USHORT PrintNameLength;
168 ULONG Flags;
169 WCHAR PathBuffer[1];
170 } SymbolicLinkReparseBuffer;
171 struct {
172 USHORT SubstituteNameOffset;
173 USHORT SubstituteNameLength;
174 USHORT PrintNameOffset;
175 USHORT PrintNameLength;
176 WCHAR PathBuffer[1];
177 } MountPointReparseBuffer;
178 struct {
179 UCHAR DataBuffer[1];
180 } GenericReparseBuffer;
181 } DUMMYUNIONNAME;
182} REPARSE_DATA_BUFFER, *PREPARSE_DATA_BUFFER;
183
c7b36b95 184#ifndef FILE_DEVICE_FILE_SYSTEM
88c4a13c 185#define FILE_DEVICE_FILE_SYSTEM 9
c7b36b95
FP		 186#endif
187#ifndef METHOD_BUFFERED
88c4a13c 188#define METHOD_BUFFERED 0
c7b36b95
FP		 189#endif
190#ifndef FILE_ANY_ACCESS
88c4a13c 191#define FILE_ANY_ACCESS 0x00000000
c7b36b95
FP		 192#endif
193#ifndef CTL_CODE
88c4a13c 194#define CTL_CODE(t,f,m,a) (((t)<<16)|((a)<<14)|((f)<<2)|(m))
c7b36b95 195#endif
c86f791f
EZ		 196/* MinGW64 defines FSCTL_GET_REPARSE_POINT on winioctl.h. */
197#ifndef FSCTL_GET_REPARSE_POINT
88c4a13c
EZ		 198#define FSCTL_GET_REPARSE_POINT \
199 CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 42, METHOD_BUFFERED, FILE_ANY_ACCESS)
6dad7178 200#endif
c86f791f 201#endif
6dad7178 202
7d701334 203/* TCP connection support. */
480b0c5b
GV		 204#include <sys/socket.h>
205#undef socket
206#undef bind
207#undef connect
208#undef htons
209#undef ntohs
210#undef inet_addr
211#undef gethostname
212#undef gethostbyname
213#undef getservbyname
ecd270eb 214#undef getpeername
380961a6 215#undef shutdown
962955c5
JR		 216#undef setsockopt
217#undef listen
218#undef getsockname
219#undef accept
220#undef recvfrom
221#undef sendto
00b3b7b3 222
3dffe395
EZ		 223#include <iphlpapi.h> /* should be after winsock2.h */
224
489f9371 225#include "w32.h"
95ef7787 226#include <dirent.h>
501199a3 227#include "w32common.h"
489f9371 228#include "w32heap.h"
a68089e4 229#include "w32select.h"
253574a6 230#include "systime.h"
f481eb31 231#include "dispextern.h" /* for xstrcasecmp */
7c80d5ec 232#include "coding.h" /* for Vlocale_coding_system */
253574a6 233
973f782d
EZ		 234#include "careadlinkat.h"
235#include "allocator.h"
236
1eb8fd91 237/* For serial_configure and serial_open. */
d888760c 238#include "process.h"
d888760c 239
2d5324c5
JR		 240typedef HRESULT (WINAPI * ShGetFolderPath_fn)
241 (IN HWND, IN int, IN HANDLE, IN DWORD, OUT char *);
242
0898ca10
JB		 243Lisp_Object QCloaded_from;
244
b56ceb92 245void globals_of_w32 (void);
8aaaec6b 246static DWORD get_rid (PSID);
6dad7178
EZ		 247static int is_symlink (const char *);
248static char * chase_symlinks (const char *);
249static int enable_privilege (LPCTSTR, BOOL, TOKEN_PRIVILEGES *);
250static int restore_privilege (TOKEN_PRIVILEGES *);
251static BOOL WINAPI revert_to_self (void);
9785d95b 252
b1846422 253static int sys_access (const char *, int);
a68089e4
EZ		 254extern void *e_malloc (size_t);
255extern int sys_select (int, SELECT_TYPE *, SELECT_TYPE *, SELECT_TYPE *,
43aac990 256 struct timespec *, void *);
1d442672
EZ		 257extern int sys_dup (int);
258
a68089e4
EZ		 259
260
18e070ac 261\f
9d95a291
EZ		 262/* Initialization states.
263
264 WARNING: If you add any more such variables for additional APIs,
265 you MUST add initialization for them to globals_of_w32
266 below. This is because these variables might get set
267 to non-NULL values during dumping, but the dumped Emacs
268 cannot reuse those values, because it could be run on a
269 different version of the OS, where API addresses are
270 different. */
9785d95b
BK		 271static BOOL g_b_init_is_windows_9x;
272static BOOL g_b_init_open_process_token;
273static BOOL g_b_init_get_token_information;
274static BOOL g_b_init_lookup_account_sid;
c617afce
EZ		 275static BOOL g_b_init_get_sid_sub_authority;
276static BOOL g_b_init_get_sid_sub_authority_count;
6dad7178 277static BOOL g_b_init_get_security_info;
df87c56c
EZ		 278static BOOL g_b_init_get_file_security_w;
279static BOOL g_b_init_get_file_security_a;
8aaaec6b
EZ		 280static BOOL g_b_init_get_security_descriptor_owner;
281static BOOL g_b_init_get_security_descriptor_group;
282static BOOL g_b_init_is_valid_sid;
7c80d5ec
EZ		 283static BOOL g_b_init_create_toolhelp32_snapshot;
284static BOOL g_b_init_process32_first;
285static BOOL g_b_init_process32_next;
286static BOOL g_b_init_open_thread_token;
287static BOOL g_b_init_impersonate_self;
288static BOOL g_b_init_revert_to_self;
289static BOOL g_b_init_get_process_memory_info;
290static BOOL g_b_init_get_process_working_set_size;
291static BOOL g_b_init_global_memory_status;
292static BOOL g_b_init_global_memory_status_ex;
f8b35b24
EZ		 293static BOOL g_b_init_get_length_sid;
294static BOOL g_b_init_equal_sid;
295static BOOL g_b_init_copy_sid;
ad9e2d54
EZ		 296static BOOL g_b_init_get_native_system_info;
297static BOOL g_b_init_get_system_times;
eeccd06f
EZ		 298static BOOL g_b_init_create_symbolic_link_w;
299static BOOL g_b_init_create_symbolic_link_a;
66447e07
EZ		 300static BOOL g_b_init_get_security_descriptor_dacl;
301static BOOL g_b_init_convert_sd_to_sddl;
302static BOOL g_b_init_convert_sddl_to_sd;
303static BOOL g_b_init_is_valid_security_descriptor;
66124e61
EZ		 304static BOOL g_b_init_set_file_security_w;
305static BOOL g_b_init_set_file_security_a;
0bbd0e0b
FP		 306static BOOL g_b_init_set_named_security_info_w;
307static BOOL g_b_init_set_named_security_info_a;
3dffe395 308static BOOL g_b_init_get_adapters_info;
9785d95b 309
f60ae425
BK		 310/*
311 BEGIN: Wrapper functions around OpenProcessToken
312 and other functions in advapi32.dll that are only
313 supported in Windows NT / 2k / XP
314*/
315 /* ** Function pointer typedefs ** */
316typedef BOOL (WINAPI * OpenProcessToken_Proc) (
317 HANDLE ProcessHandle,
318 DWORD DesiredAccess,
319 PHANDLE TokenHandle);
320typedef BOOL (WINAPI * GetTokenInformation_Proc) (
321 HANDLE TokenHandle,
322 TOKEN_INFORMATION_CLASS TokenInformationClass,
323 LPVOID TokenInformation,
324 DWORD TokenInformationLength,
325 PDWORD ReturnLength);
74258518
JR		 326typedef BOOL (WINAPI * GetProcessTimes_Proc) (
327 HANDLE process_handle,
328 LPFILETIME creation_time,
329 LPFILETIME exit_time,
330 LPFILETIME kernel_time,
331 LPFILETIME user_time);
332
333GetProcessTimes_Proc get_process_times_fn = NULL;
334
f60ae425
BK		 335#ifdef _UNICODE
336const char * const LookupAccountSid_Name = "LookupAccountSidW";
337#else
338const char * const LookupAccountSid_Name = "LookupAccountSidA";
339#endif
340typedef BOOL (WINAPI * LookupAccountSid_Proc) (
341 LPCTSTR lpSystemName,
342 PSID Sid,
343 LPTSTR Name,
344 LPDWORD cbName,
345 LPTSTR DomainName,
346 LPDWORD cbDomainName,
347 PSID_NAME_USE peUse);
c617afce
EZ		 348typedef PDWORD (WINAPI * GetSidSubAuthority_Proc) (
349 PSID pSid,
350 DWORD n);
351typedef PUCHAR (WINAPI * GetSidSubAuthorityCount_Proc) (
352 PSID pSid);
6dad7178
EZ		 353typedef DWORD (WINAPI * GetSecurityInfo_Proc) (
354 HANDLE handle,
355 SE_OBJECT_TYPE ObjectType,
356 SECURITY_INFORMATION SecurityInfo,
357 PSID *ppsidOwner,
358 PSID *ppsidGroup,
359 PACL *ppDacl,
360 PACL *ppSacl,
361 PSECURITY_DESCRIPTOR *ppSecurityDescriptor);
df87c56c
EZ		 362typedef BOOL (WINAPI * GetFileSecurityW_Proc) (
363 LPCWSTR lpFileName,
364 SECURITY_INFORMATION RequestedInformation,
365 PSECURITY_DESCRIPTOR pSecurityDescriptor,
366 DWORD nLength,
367 LPDWORD lpnLengthNeeded);
368typedef BOOL (WINAPI * GetFileSecurityA_Proc) (
369 LPCSTR lpFileName,
8aaaec6b
EZ		 370 SECURITY_INFORMATION RequestedInformation,
371 PSECURITY_DESCRIPTOR pSecurityDescriptor,
372 DWORD nLength,
373 LPDWORD lpnLengthNeeded);
66124e61
EZ		 374typedef BOOL (WINAPI *SetFileSecurityW_Proc) (
375 LPCWSTR lpFileName,
376 SECURITY_INFORMATION SecurityInformation,
377 PSECURITY_DESCRIPTOR pSecurityDescriptor);
378typedef BOOL (WINAPI *SetFileSecurityA_Proc) (
379 LPCSTR lpFileName,
66447e07
EZ		 380 SECURITY_INFORMATION SecurityInformation,
381 PSECURITY_DESCRIPTOR pSecurityDescriptor);
0bbd0e0b
FP		 382typedef DWORD (WINAPI *SetNamedSecurityInfoW_Proc) (
383 LPCWSTR lpObjectName,
384 SE_OBJECT_TYPE ObjectType,
385 SECURITY_INFORMATION SecurityInformation,
386 PSID psidOwner,
387 PSID psidGroup,
388 PACL pDacl,
389 PACL pSacl);
390typedef DWORD (WINAPI *SetNamedSecurityInfoA_Proc) (
391 LPCSTR lpObjectName,
392 SE_OBJECT_TYPE ObjectType,
393 SECURITY_INFORMATION SecurityInformation,
394 PSID psidOwner,
395 PSID psidGroup,
396 PACL pDacl,
397 PACL pSacl);
8aaaec6b
EZ		 398typedef BOOL (WINAPI * GetSecurityDescriptorOwner_Proc) (
399 PSECURITY_DESCRIPTOR pSecurityDescriptor,
400 PSID *pOwner,
401 LPBOOL lpbOwnerDefaulted);
402typedef BOOL (WINAPI * GetSecurityDescriptorGroup_Proc) (
403 PSECURITY_DESCRIPTOR pSecurityDescriptor,
404 PSID *pGroup,
405 LPBOOL lpbGroupDefaulted);
66447e07
EZ		 406typedef BOOL (WINAPI *GetSecurityDescriptorDacl_Proc) (
407 PSECURITY_DESCRIPTOR pSecurityDescriptor,
408 LPBOOL lpbDaclPresent,
409 PACL *pDacl,
410 LPBOOL lpbDaclDefaulted);
8aaaec6b
EZ		 411typedef BOOL (WINAPI * IsValidSid_Proc) (
412 PSID sid);
7c80d5ec
EZ		 413typedef HANDLE (WINAPI * CreateToolhelp32Snapshot_Proc) (
414 DWORD dwFlags,
415 DWORD th32ProcessID);
416typedef BOOL (WINAPI * Process32First_Proc) (
417 HANDLE hSnapshot,
418 LPPROCESSENTRY32 lppe);
419typedef BOOL (WINAPI * Process32Next_Proc) (
420 HANDLE hSnapshot,
421 LPPROCESSENTRY32 lppe);
422typedef BOOL (WINAPI * OpenThreadToken_Proc) (
423 HANDLE ThreadHandle,
424 DWORD DesiredAccess,
425 BOOL OpenAsSelf,
426 PHANDLE TokenHandle);
427typedef BOOL (WINAPI * ImpersonateSelf_Proc) (
428 SECURITY_IMPERSONATION_LEVEL ImpersonationLevel);
429typedef BOOL (WINAPI * RevertToSelf_Proc) (void);
430typedef BOOL (WINAPI * GetProcessMemoryInfo_Proc) (
431 HANDLE Process,
432 PPROCESS_MEMORY_COUNTERS ppsmemCounters,
433 DWORD cb);
434typedef BOOL (WINAPI * GetProcessWorkingSetSize_Proc) (
435 HANDLE hProcess,
cb576b5c
FP		 436 PSIZE_T lpMinimumWorkingSetSize,
437 PSIZE_T lpMaximumWorkingSetSize);
7c80d5ec
EZ		 438typedef BOOL (WINAPI * GlobalMemoryStatus_Proc) (
439 LPMEMORYSTATUS lpBuffer);
440typedef BOOL (WINAPI * GlobalMemoryStatusEx_Proc) (
b8526f6e 441 LPMEMORY_STATUS_EX lpBuffer);
f8b35b24
EZ		 442typedef BOOL (WINAPI * CopySid_Proc) (
443 DWORD nDestinationSidLength,
444 PSID pDestinationSid,
445 PSID pSourceSid);
446typedef BOOL (WINAPI * EqualSid_Proc) (
447 PSID pSid1,
448 PSID pSid2);
449typedef DWORD (WINAPI * GetLengthSid_Proc) (
450 PSID pSid);
ad9e2d54
EZ		 451typedef void (WINAPI * GetNativeSystemInfo_Proc) (
452 LPSYSTEM_INFO lpSystemInfo);
453typedef BOOL (WINAPI * GetSystemTimes_Proc) (
454 LPFILETIME lpIdleTime,
455 LPFILETIME lpKernelTime,
456 LPFILETIME lpUserTime);
eeccd06f
EZ		 457typedef BOOLEAN (WINAPI *CreateSymbolicLinkW_Proc) (
458 LPCWSTR lpSymlinkFileName,
459 LPCWSTR lpTargetFileName,
460 DWORD dwFlags);
461typedef BOOLEAN (WINAPI *CreateSymbolicLinkA_Proc) (
462 LPCSTR lpSymlinkFileName,
463 LPCSTR lpTargetFileName,
6dad7178 464 DWORD dwFlags);
66447e07
EZ		 465typedef BOOL (WINAPI *ConvertStringSecurityDescriptorToSecurityDescriptor_Proc) (
466 LPCTSTR StringSecurityDescriptor,
467 DWORD StringSDRevision,
468 PSECURITY_DESCRIPTOR *SecurityDescriptor,
469 PULONG SecurityDescriptorSize);
470typedef BOOL (WINAPI *ConvertSecurityDescriptorToStringSecurityDescriptor_Proc) (
471 PSECURITY_DESCRIPTOR SecurityDescriptor,
472 DWORD RequestedStringSDRevision,
473 SECURITY_INFORMATION SecurityInformation,
474 LPTSTR *StringSecurityDescriptor,
475 PULONG StringSecurityDescriptorLen);
476typedef BOOL (WINAPI *IsValidSecurityDescriptor_Proc) (PSECURITY_DESCRIPTOR);
3dffe395
EZ		 477typedef DWORD (WINAPI *GetAdaptersInfo_Proc) (
478 PIP_ADAPTER_INFO pAdapterInfo,
479 PULONG pOutBufLen);
f8b35b24 480
829f4f22
EZ		 481int (WINAPI *pMultiByteToWideChar)(UINT,DWORD,LPCSTR,int,LPWSTR,int);
482int (WINAPI *pWideCharToMultiByte)(UINT,DWORD,LPCWSTR,int,LPSTR,int,LPCSTR,LPBOOL);
483
f60ae425 484 /* ** A utility function ** */
9bfb11f9 485static BOOL
b56ceb92 486is_windows_9x (void)
f60ae425 487{
bedf4aab 488 static BOOL s_b_ret = 0;
f60ae425 489 OSVERSIONINFO os_ver;
9785d95b 490 if (g_b_init_is_windows_9x == 0)
f60ae425 491 {
9785d95b 492 g_b_init_is_windows_9x = 1;
ed3751c8
JB		 493 ZeroMemory (&os_ver, sizeof (OSVERSIONINFO));
494 os_ver.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
9785d95b
BK		 495 if (GetVersionEx (&os_ver))
496 {
497 s_b_ret = (os_ver.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS);
498 }
f60ae425 499 }
9785d95b 500 return s_b_ret;
f60ae425
BK		 501}
502
d35af63c
PE		 503static Lisp_Object ltime (ULONGLONG);
504
74258518 505/* Get total user and system times for get-internal-run-time.
d35af63c 506 Returns a list of integers if the times are provided by the OS
74258518
JR		 507 (NT derivatives), otherwise it returns the result of current-time. */
508Lisp_Object
b56ceb92 509w32_get_internal_run_time (void)
74258518
JR		 510{
511 if (get_process_times_fn)
512 {
513 FILETIME create, exit, kernel, user;
ed3751c8 514 HANDLE proc = GetCurrentProcess ();
74258518
JR		 515 if ((*get_process_times_fn) (proc, &create, &exit, &kernel, &user))
516 {
517 LARGE_INTEGER user_int, kernel_int, total;
74258518
JR		 518 user_int.LowPart = user.dwLowDateTime;
519 user_int.HighPart = user.dwHighDateTime;
520 kernel_int.LowPart = kernel.dwLowDateTime;
521 kernel_int.HighPart = kernel.dwHighDateTime;
522 total.QuadPart = user_int.QuadPart + kernel_int.QuadPart;
d35af63c 523 return ltime (total.QuadPart);
74258518
JR		 524 }
525 }
526
527 return Fcurrent_time ();
528}
529
f60ae425
BK		 530 /* ** The wrapper functions ** */
531
bedf4aab
JB		 532static BOOL WINAPI
533open_process_token (HANDLE ProcessHandle,
534 DWORD DesiredAccess,
535 PHANDLE TokenHandle)
f60ae425 536{
9785d95b 537 static OpenProcessToken_Proc s_pfn_Open_Process_Token = NULL;
f60ae425
BK		 538 HMODULE hm_advapi32 = NULL;
539 if (is_windows_9x () == TRUE)
540 {
541 return FALSE;
542 }
9785d95b
BK		 543 if (g_b_init_open_process_token == 0)
544 {
545 g_b_init_open_process_token = 1;
546 hm_advapi32 = LoadLibrary ("Advapi32.dll");
547 s_pfn_Open_Process_Token =
548 (OpenProcessToken_Proc) GetProcAddress (hm_advapi32, "OpenProcessToken");
549 }
550 if (s_pfn_Open_Process_Token == NULL)
f60ae425
BK		 551 {
552 return FALSE;
553 }
554 return (
9785d95b 555 s_pfn_Open_Process_Token (
f60ae425
BK		 556 ProcessHandle,
557 DesiredAccess,
558 TokenHandle)
559 );
560}
561
bedf4aab
JB		 562static BOOL WINAPI
563get_token_information (HANDLE TokenHandle,
564 TOKEN_INFORMATION_CLASS TokenInformationClass,
565 LPVOID TokenInformation,
566 DWORD TokenInformationLength,
567 PDWORD ReturnLength)
f60ae425 568{
9785d95b 569 static GetTokenInformation_Proc s_pfn_Get_Token_Information = NULL;
f60ae425
BK		 570 HMODULE hm_advapi32 = NULL;
571 if (is_windows_9x () == TRUE)
572 {
573 return FALSE;
574 }
9785d95b
BK		 575 if (g_b_init_get_token_information == 0)
576 {
577 g_b_init_get_token_information = 1;
578 hm_advapi32 = LoadLibrary ("Advapi32.dll");
579 s_pfn_Get_Token_Information =
580 (GetTokenInformation_Proc) GetProcAddress (hm_advapi32, "GetTokenInformation");
581 }
582 if (s_pfn_Get_Token_Information == NULL)
f60ae425
BK		 583 {
584 return FALSE;
585 }
586 return (
9785d95b 587 s_pfn_Get_Token_Information (
f60ae425
BK		 588 TokenHandle,
589 TokenInformationClass,
590 TokenInformation,
591 TokenInformationLength,
592 ReturnLength)
593 );
594}
595
bedf4aab
JB		 596static BOOL WINAPI
597lookup_account_sid (LPCTSTR lpSystemName,
598 PSID Sid,
599 LPTSTR Name,
600 LPDWORD cbName,
601 LPTSTR DomainName,
602 LPDWORD cbDomainName,
603 PSID_NAME_USE peUse)
f60ae425 604{
9785d95b 605 static LookupAccountSid_Proc s_pfn_Lookup_Account_Sid = NULL;
f60ae425
BK		 606 HMODULE hm_advapi32 = NULL;
607 if (is_windows_9x () == TRUE)
608 {
609 return FALSE;
610 }
9785d95b
BK		 611 if (g_b_init_lookup_account_sid == 0)
612 {
613 g_b_init_lookup_account_sid = 1;
614 hm_advapi32 = LoadLibrary ("Advapi32.dll");
615 s_pfn_Lookup_Account_Sid =
616 (LookupAccountSid_Proc) GetProcAddress (hm_advapi32, LookupAccountSid_Name);
617 }
618 if (s_pfn_Lookup_Account_Sid == NULL)
f60ae425
BK		 619 {
620 return FALSE;
621 }
622 return (
9785d95b 623 s_pfn_Lookup_Account_Sid (
f60ae425
BK		 624 lpSystemName,
625 Sid,
626 Name,
627 cbName,
628 DomainName,
629 cbDomainName,
630 peUse)
631 );
632}
633
bedf4aab
JB		 634static PDWORD WINAPI
635get_sid_sub_authority (PSID pSid, DWORD n)
c617afce
EZ		 636{
637 static GetSidSubAuthority_Proc s_pfn_Get_Sid_Sub_Authority = NULL;
6811b9f4 638 static DWORD zero = 0U;
c617afce
EZ		 639 HMODULE hm_advapi32 = NULL;
640 if (is_windows_9x () == TRUE)
641 {
6811b9f4 642 return &zero;
c617afce
EZ		 643 }
644 if (g_b_init_get_sid_sub_authority == 0)
645 {
646 g_b_init_get_sid_sub_authority = 1;
647 hm_advapi32 = LoadLibrary ("Advapi32.dll");
648 s_pfn_Get_Sid_Sub_Authority =
649 (GetSidSubAuthority_Proc) GetProcAddress (
650 hm_advapi32, "GetSidSubAuthority");
651 }
652 if (s_pfn_Get_Sid_Sub_Authority == NULL)
653 {
6811b9f4 654 return &zero;
c617afce
EZ		 655 }
656 return (s_pfn_Get_Sid_Sub_Authority (pSid, n));
657}
658
bedf4aab
JB		 659static PUCHAR WINAPI
660get_sid_sub_authority_count (PSID pSid)
c617afce
EZ		 661{
662 static GetSidSubAuthorityCount_Proc s_pfn_Get_Sid_Sub_Authority_Count = NULL;
6811b9f4 663 static UCHAR zero = 0U;
c617afce
EZ		 664 HMODULE hm_advapi32 = NULL;
665 if (is_windows_9x () == TRUE)
666 {
6811b9f4 667 return &zero;
c617afce
EZ		 668 }
669 if (g_b_init_get_sid_sub_authority_count == 0)
670 {
671 g_b_init_get_sid_sub_authority_count = 1;
672 hm_advapi32 = LoadLibrary ("Advapi32.dll");
673 s_pfn_Get_Sid_Sub_Authority_Count =
674 (GetSidSubAuthorityCount_Proc) GetProcAddress (
675 hm_advapi32, "GetSidSubAuthorityCount");
676 }
677 if (s_pfn_Get_Sid_Sub_Authority_Count == NULL)
678 {
6811b9f4 679 return &zero;
c617afce
EZ		 680 }
681 return (s_pfn_Get_Sid_Sub_Authority_Count (pSid));
682}
683
6dad7178
EZ		 684static DWORD WINAPI
685get_security_info (HANDLE handle,
686 SE_OBJECT_TYPE ObjectType,
687 SECURITY_INFORMATION SecurityInfo,
688 PSID *ppsidOwner,
689 PSID *ppsidGroup,
690 PACL *ppDacl,
691 PACL *ppSacl,
692 PSECURITY_DESCRIPTOR *ppSecurityDescriptor)
693{
694 static GetSecurityInfo_Proc s_pfn_Get_Security_Info = NULL;
695 HMODULE hm_advapi32 = NULL;
696 if (is_windows_9x () == TRUE)
697 {
698 return FALSE;
699 }
700 if (g_b_init_get_security_info == 0)
701 {
702 g_b_init_get_security_info = 1;
703 hm_advapi32 = LoadLibrary ("Advapi32.dll");
704 s_pfn_Get_Security_Info =
705 (GetSecurityInfo_Proc) GetProcAddress (
706 hm_advapi32, "GetSecurityInfo");
707 }
708 if (s_pfn_Get_Security_Info == NULL)
709 {
710 return FALSE;
711 }
712 return (s_pfn_Get_Security_Info (handle, ObjectType, SecurityInfo,
713 ppsidOwner, ppsidGroup, ppDacl, ppSacl,
714 ppSecurityDescriptor));
715}
716
bedf4aab 717static BOOL WINAPI
df87c56c 718get_file_security (const char *lpFileName,
bedf4aab
JB		 719 SECURITY_INFORMATION RequestedInformation,
720 PSECURITY_DESCRIPTOR pSecurityDescriptor,
721 DWORD nLength,
722 LPDWORD lpnLengthNeeded)
8aaaec6b 723{
df87c56c
EZ		 724 static GetFileSecurityA_Proc s_pfn_Get_File_SecurityA = NULL;
725 static GetFileSecurityW_Proc s_pfn_Get_File_SecurityW = NULL;
8aaaec6b
EZ		 726 HMODULE hm_advapi32 = NULL;
727 if (is_windows_9x () == TRUE)
728 {
66447e07 729 errno = ENOTSUP;
8aaaec6b
EZ		 730 return FALSE;
731 }
df87c56c 732 if (w32_unicode_filenames)
8aaaec6b 733 {
df87c56c
EZ		 734 wchar_t filename_w[MAX_PATH];
735
736 if (g_b_init_get_file_security_w == 0)
737 {
738 g_b_init_get_file_security_w = 1;
739 hm_advapi32 = LoadLibrary ("Advapi32.dll");
740 s_pfn_Get_File_SecurityW =
741 (GetFileSecurityW_Proc) GetProcAddress (hm_advapi32,
742 "GetFileSecurityW");
743 }
744 if (s_pfn_Get_File_SecurityW == NULL)
745 {
746 errno = ENOTSUP;
747 return FALSE;
748 }
749 filename_to_utf16 (lpFileName, filename_w);
750 return (s_pfn_Get_File_SecurityW (filename_w, RequestedInformation,
751 pSecurityDescriptor, nLength,
752 lpnLengthNeeded));
8aaaec6b 753 }
df87c56c 754 else
8aaaec6b 755 {
df87c56c
EZ		 756 char filename_a[MAX_PATH];
757
758 if (g_b_init_get_file_security_a == 0)
759 {
760 g_b_init_get_file_security_a = 1;
761 hm_advapi32 = LoadLibrary ("Advapi32.dll");
762 s_pfn_Get_File_SecurityA =
763 (GetFileSecurityA_Proc) GetProcAddress (hm_advapi32,
764 "GetFileSecurityA");
765 }
766 if (s_pfn_Get_File_SecurityA == NULL)
767 {
768 errno = ENOTSUP;
769 return FALSE;
770 }
771 filename_to_ansi (lpFileName, filename_a);
772 return (s_pfn_Get_File_SecurityA (filename_a, RequestedInformation,
773 pSecurityDescriptor, nLength,
774 lpnLengthNeeded));
8aaaec6b 775 }
8aaaec6b
EZ		 776}
777
66447e07 778static BOOL WINAPI
66124e61 779set_file_security (const char *lpFileName,
66447e07
EZ		 780 SECURITY_INFORMATION SecurityInformation,
781 PSECURITY_DESCRIPTOR pSecurityDescriptor)
782{
66124e61
EZ		 783 static SetFileSecurityW_Proc s_pfn_Set_File_SecurityW = NULL;
784 static SetFileSecurityA_Proc s_pfn_Set_File_SecurityA = NULL;
66447e07
EZ		 785 HMODULE hm_advapi32 = NULL;
786 if (is_windows_9x () == TRUE)
787 {
788 errno = ENOTSUP;
789 return FALSE;
790 }
66124e61 791 if (w32_unicode_filenames)
66447e07 792 {
66124e61
EZ		 793 wchar_t filename_w[MAX_PATH];
794
795 if (g_b_init_set_file_security_w == 0)
796 {
797 g_b_init_set_file_security_w = 1;
798 hm_advapi32 = LoadLibrary ("Advapi32.dll");
799 s_pfn_Set_File_SecurityW =
800 (SetFileSecurityW_Proc) GetProcAddress (hm_advapi32,
801 "SetFileSecurityW");
802 }
803 if (s_pfn_Set_File_SecurityW == NULL)
804 {
805 errno = ENOTSUP;
806 return FALSE;
807 }
808 filename_to_utf16 (lpFileName, filename_w);
809 return (s_pfn_Set_File_SecurityW (filename_w, SecurityInformation,
810 pSecurityDescriptor));
66447e07 811 }
66124e61 812 else
66447e07 813 {
66124e61
EZ		 814 char filename_a[MAX_PATH];
815
816 if (g_b_init_set_file_security_a == 0)
817 {
818 g_b_init_set_file_security_a = 1;
819 hm_advapi32 = LoadLibrary ("Advapi32.dll");
820 s_pfn_Set_File_SecurityA =
821 (SetFileSecurityA_Proc) GetProcAddress (hm_advapi32,
822 "SetFileSecurityA");
823 }
824 if (s_pfn_Set_File_SecurityA == NULL)
825 {
826 errno = ENOTSUP;
827 return FALSE;
828 }
829 filename_to_ansi (lpFileName, filename_a);
830 return (s_pfn_Set_File_SecurityA (filename_a, SecurityInformation,
831 pSecurityDescriptor));
66447e07 832 }
66447e07
EZ		 833}
834
0bbd0e0b
FP		 835static DWORD WINAPI
836set_named_security_info (LPCTSTR lpObjectName,
837 SE_OBJECT_TYPE ObjectType,
838 SECURITY_INFORMATION SecurityInformation,
839 PSID psidOwner,
840 PSID psidGroup,
841 PACL pDacl,
842 PACL pSacl)
843{
844 static SetNamedSecurityInfoW_Proc s_pfn_Set_Named_Security_InfoW = NULL;
845 static SetNamedSecurityInfoA_Proc s_pfn_Set_Named_Security_InfoA = NULL;
846 HMODULE hm_advapi32 = NULL;
847 if (is_windows_9x () == TRUE)
848 {
849 errno = ENOTSUP;
850 return ENOTSUP;
851 }
852 if (w32_unicode_filenames)
853 {
854 wchar_t filename_w[MAX_PATH];
855
856 if (g_b_init_set_named_security_info_w == 0)
857 {
858 g_b_init_set_named_security_info_w = 1;
859 hm_advapi32 = LoadLibrary ("Advapi32.dll");
860 s_pfn_Set_Named_Security_InfoW =
861 (SetNamedSecurityInfoW_Proc) GetProcAddress (hm_advapi32,
862 "SetNamedSecurityInfoW");
863 }
864 if (s_pfn_Set_Named_Security_InfoW == NULL)
865 {
866 errno = ENOTSUP;
867 return ENOTSUP;
868 }
869 filename_to_utf16 (lpObjectName, filename_w);
870 return (s_pfn_Set_Named_Security_InfoW (filename_w, ObjectType,
871 SecurityInformation, psidOwner,
872 psidGroup, pDacl, pSacl));
873 }
874 else
875 {
876 char filename_a[MAX_PATH];
877
878 if (g_b_init_set_named_security_info_a == 0)
879 {
880 g_b_init_set_named_security_info_a = 1;
881 hm_advapi32 = LoadLibrary ("Advapi32.dll");
882 s_pfn_Set_Named_Security_InfoA =
883 (SetNamedSecurityInfoA_Proc) GetProcAddress (hm_advapi32,
884 "SetNamedSecurityInfoA");
885 }
886 if (s_pfn_Set_Named_Security_InfoA == NULL)
887 {
888 errno = ENOTSUP;
889 return ENOTSUP;
890 }
891 filename_to_ansi (lpObjectName, filename_a);
892 return (s_pfn_Set_Named_Security_InfoA (filename_a, ObjectType,
893 SecurityInformation, psidOwner,
894 psidGroup, pDacl, pSacl));
895 }
896}
897
bedf4aab
JB		 898static BOOL WINAPI
899get_security_descriptor_owner (PSECURITY_DESCRIPTOR pSecurityDescriptor,
900 PSID *pOwner,
901 LPBOOL lpbOwnerDefaulted)
8aaaec6b
EZ		 902{
903 static GetSecurityDescriptorOwner_Proc s_pfn_Get_Security_Descriptor_Owner = NULL;
904 HMODULE hm_advapi32 = NULL;
905 if (is_windows_9x () == TRUE)
906 {
66447e07 907 errno = ENOTSUP;
8aaaec6b
EZ		 908 return FALSE;
909 }
910 if (g_b_init_get_security_descriptor_owner == 0)
911 {
912 g_b_init_get_security_descriptor_owner = 1;
913 hm_advapi32 = LoadLibrary ("Advapi32.dll");
914 s_pfn_Get_Security_Descriptor_Owner =
915 (GetSecurityDescriptorOwner_Proc) GetProcAddress (
916 hm_advapi32, "GetSecurityDescriptorOwner");
917 }
918 if (s_pfn_Get_Security_Descriptor_Owner == NULL)
919 {
66447e07 920 errno = ENOTSUP;
8aaaec6b
EZ		 921 return FALSE;
922 }
923 return (s_pfn_Get_Security_Descriptor_Owner (pSecurityDescriptor, pOwner,
924 lpbOwnerDefaulted));
925}
926
bedf4aab
JB		 927static BOOL WINAPI
928get_security_descriptor_group (PSECURITY_DESCRIPTOR pSecurityDescriptor,
929 PSID *pGroup,
930 LPBOOL lpbGroupDefaulted)
8aaaec6b
EZ		 931{
932 static GetSecurityDescriptorGroup_Proc s_pfn_Get_Security_Descriptor_Group = NULL;
933 HMODULE hm_advapi32 = NULL;
934 if (is_windows_9x () == TRUE)
935 {
66447e07 936 errno = ENOTSUP;
8aaaec6b
EZ		 937 return FALSE;
938 }
939 if (g_b_init_get_security_descriptor_group == 0)
940 {
941 g_b_init_get_security_descriptor_group = 1;
942 hm_advapi32 = LoadLibrary ("Advapi32.dll");
943 s_pfn_Get_Security_Descriptor_Group =
944 (GetSecurityDescriptorGroup_Proc) GetProcAddress (
945 hm_advapi32, "GetSecurityDescriptorGroup");
946 }
947 if (s_pfn_Get_Security_Descriptor_Group == NULL)
948 {
66447e07 949 errno = ENOTSUP;
8aaaec6b
EZ		 950 return FALSE;
951 }
952 return (s_pfn_Get_Security_Descriptor_Group (pSecurityDescriptor, pGroup,
953 lpbGroupDefaulted));
954}
955
66447e07
EZ		 956static BOOL WINAPI
957get_security_descriptor_dacl (PSECURITY_DESCRIPTOR pSecurityDescriptor,
958 LPBOOL lpbDaclPresent,
959 PACL *pDacl,
960 LPBOOL lpbDaclDefaulted)
961{
962 static GetSecurityDescriptorDacl_Proc s_pfn_Get_Security_Descriptor_Dacl = NULL;
963 HMODULE hm_advapi32 = NULL;
964 if (is_windows_9x () == TRUE)
965 {
966 errno = ENOTSUP;
967 return FALSE;
968 }
969 if (g_b_init_get_security_descriptor_dacl == 0)
970 {
971 g_b_init_get_security_descriptor_dacl = 1;
972 hm_advapi32 = LoadLibrary ("Advapi32.dll");
973 s_pfn_Get_Security_Descriptor_Dacl =
974 (GetSecurityDescriptorDacl_Proc) GetProcAddress (
975 hm_advapi32, "GetSecurityDescriptorDacl");
976 }
977 if (s_pfn_Get_Security_Descriptor_Dacl == NULL)
978 {
979 errno = ENOTSUP;
980 return FALSE;
981 }
982 return (s_pfn_Get_Security_Descriptor_Dacl (pSecurityDescriptor,
983 lpbDaclPresent, pDacl,
984 lpbDaclDefaulted));
985}
986
bedf4aab
JB		 987static BOOL WINAPI
988is_valid_sid (PSID sid)
8aaaec6b
EZ		 989{
990 static IsValidSid_Proc s_pfn_Is_Valid_Sid = NULL;
991 HMODULE hm_advapi32 = NULL;
992 if (is_windows_9x () == TRUE)
993 {
994 return FALSE;
995 }
996 if (g_b_init_is_valid_sid == 0)
997 {
998 g_b_init_is_valid_sid = 1;
999 hm_advapi32 = LoadLibrary ("Advapi32.dll");
1000 s_pfn_Is_Valid_Sid =
1001 (IsValidSid_Proc) GetProcAddress (
1002 hm_advapi32, "IsValidSid");
1003 }
1004 if (s_pfn_Is_Valid_Sid == NULL)
1005 {
1006 return FALSE;
1007 }
1008 return (s_pfn_Is_Valid_Sid (sid));
1009}
1010
bedf4aab
JB		 1011static BOOL WINAPI
1012equal_sid (PSID sid1, PSID sid2)
f8b35b24
EZ		 1013{
1014 static EqualSid_Proc s_pfn_Equal_Sid = NULL;
1015 HMODULE hm_advapi32 = NULL;
1016 if (is_windows_9x () == TRUE)
1017 {
1018 return FALSE;
1019 }
1020 if (g_b_init_equal_sid == 0)
1021 {
1022 g_b_init_equal_sid = 1;
1023 hm_advapi32 = LoadLibrary ("Advapi32.dll");
1024 s_pfn_Equal_Sid =
1025 (EqualSid_Proc) GetProcAddress (
1026 hm_advapi32, "EqualSid");
1027 }
1028 if (s_pfn_Equal_Sid == NULL)
1029 {
1030 return FALSE;
1031 }
1032 return (s_pfn_Equal_Sid (sid1, sid2));
1033}
1034
bedf4aab
JB		 1035static DWORD WINAPI
1036get_length_sid (PSID sid)
f8b35b24
EZ		 1037{
1038 static GetLengthSid_Proc s_pfn_Get_Length_Sid = NULL;
1039 HMODULE hm_advapi32 = NULL;
1040 if (is_windows_9x () == TRUE)
1041 {
1042 return 0;
1043 }
1044 if (g_b_init_get_length_sid == 0)
1045 {
1046 g_b_init_get_length_sid = 1;
1047 hm_advapi32 = LoadLibrary ("Advapi32.dll");
1048 s_pfn_Get_Length_Sid =
1049 (GetLengthSid_Proc) GetProcAddress (
1050 hm_advapi32, "GetLengthSid");
1051 }
1052 if (s_pfn_Get_Length_Sid == NULL)
1053 {
1054 return 0;
1055 }
1056 return (s_pfn_Get_Length_Sid (sid));
1057}
1058
bedf4aab
JB		 1059static BOOL WINAPI
1060copy_sid (DWORD destlen, PSID dest, PSID src)
f8b35b24
EZ		 1061{
1062 static CopySid_Proc s_pfn_Copy_Sid = NULL;
1063 HMODULE hm_advapi32 = NULL;
1064 if (is_windows_9x () == TRUE)
1065 {
1066 return FALSE;
1067 }
1068 if (g_b_init_copy_sid == 0)
1069 {
1070 g_b_init_copy_sid = 1;
1071 hm_advapi32 = LoadLibrary ("Advapi32.dll");
1072 s_pfn_Copy_Sid =
1073 (CopySid_Proc) GetProcAddress (
1074 hm_advapi32, "CopySid");
1075 }
1076 if (s_pfn_Copy_Sid == NULL)
1077 {
1078 return FALSE;
1079 }
1080 return (s_pfn_Copy_Sid (destlen, dest, src));
1081}
1082
f60ae425
BK		 1083/*
1084 END: Wrapper functions around OpenProcessToken
1085 and other functions in advapi32.dll that are only
1086 supported in Windows NT / 2k / XP
1087*/
1088
bedf4aab
JB		 1089static void WINAPI
1090get_native_system_info (LPSYSTEM_INFO lpSystemInfo)
ad9e2d54
EZ		 1091{
1092 static GetNativeSystemInfo_Proc s_pfn_Get_Native_System_Info = NULL;
1093 if (is_windows_9x () != TRUE)
1094 {
1095 if (g_b_init_get_native_system_info == 0)
1096 {
1097 g_b_init_get_native_system_info = 1;
1098 s_pfn_Get_Native_System_Info =
1099 (GetNativeSystemInfo_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
1100 "GetNativeSystemInfo");
1101 }
1102 if (s_pfn_Get_Native_System_Info != NULL)
1103 s_pfn_Get_Native_System_Info (lpSystemInfo);
1104 }
1105 else
1106 lpSystemInfo->dwNumberOfProcessors = -1;
1107}
1108
bedf4aab
JB		 1109static BOOL WINAPI
1110get_system_times (LPFILETIME lpIdleTime,
1111 LPFILETIME lpKernelTime,
1112 LPFILETIME lpUserTime)
ad9e2d54
EZ		 1113{
1114 static GetSystemTimes_Proc s_pfn_Get_System_times = NULL;
1115 if (is_windows_9x () == TRUE)
1116 {
1117 return FALSE;
1118 }
1119 if (g_b_init_get_system_times == 0)
1120 {
1121 g_b_init_get_system_times = 1;
1122 s_pfn_Get_System_times =
1123 (GetSystemTimes_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
1124 "GetSystemTimes");
1125 }
1126 if (s_pfn_Get_System_times == NULL)
1127 return FALSE;
1128 return (s_pfn_Get_System_times (lpIdleTime, lpKernelTime, lpUserTime));
1129}
6dad7178
EZ		 1130
1131static BOOLEAN WINAPI
eeccd06f
EZ		 1132create_symbolic_link (LPCSTR lpSymlinkFilename,
1133 LPCSTR lpTargetFileName,
6dad7178
EZ		 1134 DWORD dwFlags)
1135{
eeccd06f
EZ		 1136 static CreateSymbolicLinkW_Proc s_pfn_Create_Symbolic_LinkW = NULL;
1137 static CreateSymbolicLinkA_Proc s_pfn_Create_Symbolic_LinkA = NULL;
6dad7178
EZ		 1138 BOOLEAN retval;
1139
1140 if (is_windows_9x () == TRUE)
1141 {
1142 errno = ENOSYS;
1143 return 0;
1144 }
eeccd06f 1145 if (w32_unicode_filenames)
6dad7178 1146 {
eeccd06f
EZ		 1147 wchar_t symfn_w[MAX_PATH], tgtfn_w[MAX_PATH];
1148
1149 if (g_b_init_create_symbolic_link_w == 0)
1150 {
1151 g_b_init_create_symbolic_link_w = 1;
1152 s_pfn_Create_Symbolic_LinkW =
1153 (CreateSymbolicLinkW_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
1154 "CreateSymbolicLinkW");
1155 }
1156 if (s_pfn_Create_Symbolic_LinkW == NULL)
1157 {
1158 errno = ENOSYS;
1159 return 0;
1160 }
1161
1162 filename_to_utf16 (lpSymlinkFilename, symfn_w);
1163 filename_to_utf16 (lpTargetFileName, tgtfn_w);
1164 retval = s_pfn_Create_Symbolic_LinkW (symfn_w, tgtfn_w, dwFlags);
1165 /* If we were denied creation of the symlink, try again after
1166 enabling the SeCreateSymbolicLinkPrivilege for our process. */
1167 if (!retval)
1168 {
1169 TOKEN_PRIVILEGES priv_current;
1170
1171 if (enable_privilege (SE_CREATE_SYMBOLIC_LINK_NAME, TRUE,
1172 &priv_current))
1173 {
1174 retval = s_pfn_Create_Symbolic_LinkW (symfn_w, tgtfn_w, dwFlags);
1175 restore_privilege (&priv_current);
1176 revert_to_self ();
1177 }
1178 }
6dad7178 1179 }
eeccd06f 1180 else
6dad7178 1181 {
eeccd06f 1182 char symfn_a[MAX_PATH], tgtfn_a[MAX_PATH];
6dad7178 1183
eeccd06f
EZ		 1184 if (g_b_init_create_symbolic_link_a == 0)
1185 {
1186 g_b_init_create_symbolic_link_a = 1;
1187 s_pfn_Create_Symbolic_LinkA =
1188 (CreateSymbolicLinkA_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
1189 "CreateSymbolicLinkA");
1190 }
1191 if (s_pfn_Create_Symbolic_LinkA == NULL)
1192 {
1193 errno = ENOSYS;
1194 return 0;
1195 }
6dad7178 1196
eeccd06f
EZ		 1197 filename_to_ansi (lpSymlinkFilename, symfn_a);
1198 filename_to_ansi (lpTargetFileName, tgtfn_a);
1199 retval = s_pfn_Create_Symbolic_LinkA (symfn_a, tgtfn_a, dwFlags);
1200 /* If we were denied creation of the symlink, try again after
1201 enabling the SeCreateSymbolicLinkPrivilege for our process. */
1202 if (!retval)
6dad7178 1203 {
eeccd06f
EZ		 1204 TOKEN_PRIVILEGES priv_current;
1205
1206 if (enable_privilege (SE_CREATE_SYMBOLIC_LINK_NAME, TRUE,
1207 &priv_current))
1208 {
1209 retval = s_pfn_Create_Symbolic_LinkA (symfn_a, tgtfn_a, dwFlags);
1210 restore_privilege (&priv_current);
1211 revert_to_self ();
1212 }
6dad7178
EZ		 1213 }
1214 }
1215 return retval;
1216}
66447e07
EZ		 1217
1218static BOOL WINAPI
1219is_valid_security_descriptor (PSECURITY_DESCRIPTOR pSecurityDescriptor)
1220{
1221 static IsValidSecurityDescriptor_Proc s_pfn_Is_Valid_Security_Descriptor_Proc = NULL;
1222
1223 if (is_windows_9x () == TRUE)
1224 {
1225 errno = ENOTSUP;
1226 return FALSE;
1227 }
1228
1229 if (g_b_init_is_valid_security_descriptor == 0)
1230 {
1231 g_b_init_is_valid_security_descriptor = 1;
1232 s_pfn_Is_Valid_Security_Descriptor_Proc =
1233 (IsValidSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1234 "IsValidSecurityDescriptor");
1235 }
1236 if (s_pfn_Is_Valid_Security_Descriptor_Proc == NULL)
1237 {
1238 errno = ENOTSUP;
1239 return FALSE;
1240 }
1241
1242 return s_pfn_Is_Valid_Security_Descriptor_Proc (pSecurityDescriptor);
1243}
1244
1245static BOOL WINAPI
1246convert_sd_to_sddl (PSECURITY_DESCRIPTOR SecurityDescriptor,
1247 DWORD RequestedStringSDRevision,
1248 SECURITY_INFORMATION SecurityInformation,
1249 LPTSTR *StringSecurityDescriptor,
1250 PULONG StringSecurityDescriptorLen)
1251{
1252 static ConvertSecurityDescriptorToStringSecurityDescriptor_Proc s_pfn_Convert_SD_To_SDDL = NULL;
1253 BOOL retval;
1254
1255 if (is_windows_9x () == TRUE)
1256 {
1257 errno = ENOTSUP;
1258 return FALSE;
1259 }
1260
1261 if (g_b_init_convert_sd_to_sddl == 0)
1262 {
1263 g_b_init_convert_sd_to_sddl = 1;
1264#ifdef _UNICODE
1265 s_pfn_Convert_SD_To_SDDL =
1266 (ConvertSecurityDescriptorToStringSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1267 "ConvertSecurityDescriptorToStringSecurityDescriptorW");
1268#else
1269 s_pfn_Convert_SD_To_SDDL =
1270 (ConvertSecurityDescriptorToStringSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1271 "ConvertSecurityDescriptorToStringSecurityDescriptorA");
1272#endif
1273 }
1274 if (s_pfn_Convert_SD_To_SDDL == NULL)
1275 {
1276 errno = ENOTSUP;
1277 return FALSE;
1278 }
1279
1280 retval = s_pfn_Convert_SD_To_SDDL (SecurityDescriptor,
1281 RequestedStringSDRevision,
1282 SecurityInformation,
1283 StringSecurityDescriptor,
1284 StringSecurityDescriptorLen);
1285
1286 return retval;
1287}
1288
1289static BOOL WINAPI
1290convert_sddl_to_sd (LPCTSTR StringSecurityDescriptor,
1291 DWORD StringSDRevision,
1292 PSECURITY_DESCRIPTOR *SecurityDescriptor,
1293 PULONG SecurityDescriptorSize)
1294{
1295 static ConvertStringSecurityDescriptorToSecurityDescriptor_Proc s_pfn_Convert_SDDL_To_SD = NULL;
1296 BOOL retval;
1297
1298 if (is_windows_9x () == TRUE)
1299 {
1300 errno = ENOTSUP;
1301 return FALSE;
1302 }
1303
1304 if (g_b_init_convert_sddl_to_sd == 0)
1305 {
1306 g_b_init_convert_sddl_to_sd = 1;
1307#ifdef _UNICODE
1308 s_pfn_Convert_SDDL_To_SD =
1309 (ConvertStringSecurityDescriptorToSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1310 "ConvertStringSecurityDescriptorToSecurityDescriptorW");
1311#else
1312 s_pfn_Convert_SDDL_To_SD =
1313 (ConvertStringSecurityDescriptorToSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1314 "ConvertStringSecurityDescriptorToSecurityDescriptorA");
1315#endif
1316 }
1317 if (s_pfn_Convert_SDDL_To_SD == NULL)
1318 {
1319 errno = ENOTSUP;
1320 return FALSE;
1321 }
1322
1323 retval = s_pfn_Convert_SDDL_To_SD (StringSecurityDescriptor,
1324 StringSDRevision,
1325 SecurityDescriptor,
1326 SecurityDescriptorSize);
1327
1328 return retval;
1329}
1330
3dffe395
EZ		 1331static DWORD WINAPI
1332get_adapters_info (PIP_ADAPTER_INFO pAdapterInfo, PULONG pOutBufLen)
1333{
1334 static GetAdaptersInfo_Proc s_pfn_Get_Adapters_Info = NULL;
1335 HMODULE hm_iphlpapi = NULL;
1336
1337 if (is_windows_9x () == TRUE)
1338 return ERROR_NOT_SUPPORTED;
1339
1340 if (g_b_init_get_adapters_info == 0)
1341 {
1342 g_b_init_get_adapters_info = 1;
1343 hm_iphlpapi = LoadLibrary ("Iphlpapi.dll");
1344 if (hm_iphlpapi)
1345 s_pfn_Get_Adapters_Info = (GetAdaptersInfo_Proc)
1346 GetProcAddress (hm_iphlpapi, "GetAdaptersInfo");
1347 }
1348 if (s_pfn_Get_Adapters_Info == NULL)
1349 return ERROR_NOT_SUPPORTED;
1350 return s_pfn_Get_Adapters_Info (pAdapterInfo, pOutBufLen);
1351}
1352
f60ae425 1353\f
18e070ac 1354
ed91b2ad
EZ		 1355/* Return 1 if P is a valid pointer to an object of size SIZE. Return
1356 0 if P is NOT a valid pointer. Return -1 if we cannot validate P.
1357
1358 This is called from alloc.c:valid_pointer_p. */
1359int
1360w32_valid_pointer_p (void *p, int size)
1361{
1362 SIZE_T done;
1363 HANDLE h = OpenProcess (PROCESS_VM_READ, FALSE, GetCurrentProcessId ());
1364
1365 if (h)
1366 {
1367 unsigned char *buf = alloca (size);
1368 int retval = ReadProcessMemory (h, p, buf, size, &done);
1369
1370 CloseHandle (h);
1371 return retval;
1372 }
1373 else
1374 return -1;
1375}
1376
03d58cca
EZ		 1377\f
1378
0cd7a14e
EZ		 1379/* Here's an overview of how the Windows build supports file names
1380 that cannot be encoded by the current system codepage.
1381
1382 From the POV of Lisp and layers of C code above the functions here,
1383 Emacs on Windows pretends that its file names are encoded in UTF-8;
1384 see encode_file and decode_file on coding.c. Any file name that is
1385 passed as a unibyte string to C functions defined here is assumed
1386 to be in UTF-8 encoding. Any file name returned by functions
1387 defined here must be in UTF-8 encoding, with only a few exceptions
1388 reserved for a couple of special cases. (Be sure to use
1389 MAX_UTF8_PATH for char arrays that store UTF-8 encoded file names,
1390 as they can be much longer than MAX_PATH!)
1391
1392 The UTF-8 encoded file names cannot be passed to system APIs, as
1393 Windows does not support that. Therefore, they are converted
1394 either to UTF-16 or to the ANSI codepage, depending on the value of
1395 w32-unicode-filenames, before calling any system APIs or CRT library
1396 functions. The default value of that variable is determined by the
1397 OS on which Emacs runs: nil on Windows 9X and t otherwise, but the
1398 user can change that default (although I don't see why would she
1399 want to).
1400
1401 The 4 functions defined below, filename_to_utf16, filename_to_ansi,
1402 filename_from_utf16, and filename_from_ansi, are the workhorses of
1403 these conversions. They rely on Windows native APIs
1404 MultiByteToWideChar and WideCharToMultiByte; we cannot use
1405 functions from coding.c here, because they allocate memory, which
1406 is a bad idea on the level of libc, which is what the functions
1407 here emulate. (If you worry about performance due to constant
1408 conversion back and forth from UTF-8 to UTF-16, then don't: first,
1409 it was measured to take only a few microseconds on a not-so-fast
1410 machine, and second, that's exactly what the ANSI APIs we used
a3c3a662 1411 before did anyway, because they are just thin wrappers around the
0cd7a14e
EZ		 1412 Unicode APIs.)
1413
1414 The variables file-name-coding-system and default-file-name-coding-system
1415 still exist, but are actually used only when a file name needs to
1416 be converted to the ANSI codepage. This happens all the time when
1417 w32-unicode-filenames is nil, but can also happen from time to time
1418 when it is t. Otherwise, these variables have no effect on file-name
1419 encoding when w32-unicode-filenames is t; this is similar to
1420 selection-coding-system.
1421
080fd649
EZ		 1422 This arrangement works very well, but it has a few gotchas and
1423 limitations:
0cd7a14e
EZ		 1424
1425 . Lisp code that encodes or decodes file names manually should
1426 normally use 'utf-8' as the coding-system on Windows,
1427 disregarding file-name-coding-system. This is a somewhat
1428 unpleasant consequence, but it cannot be avoided. Fortunately,
1429 very few Lisp packages need to do that.
1430
1431 More generally, passing to library functions (e.g., fopen or
1432 opendir) file names already encoded in the ANSI codepage is
32e93c9e 1433 explicitly *verboten*, as all those functions, as shadowed and
0cd7a14e
EZ		 1434 emulated here, assume they will receive UTF-8 encoded file names.
1435
1436 For the same reasons, no CRT function or Win32 API can be called
1437 directly in Emacs sources, without either converting the file
a3c3a662
EZ		 1438 names from UTF-8 to UTF-16 or ANSI codepage, or going through
1439 some shadowing function defined here.
0cd7a14e 1440
080fd649
EZ		 1441 . Environment variables stored in Vprocess_environment are encoded
1442 in the ANSI codepage, so if getenv/egetenv is used for a variable
1443 whose value is a file name or a list of directories, it needs to
1444 be converted to UTF-8, before it is used as argument to functions
1445 or decoded into a Lisp string.
1446
0cd7a14e
EZ		 1447 . File names passed to external libraries, like the image libraries
1448 and GnuTLS, need special handling. These libraries generally
1449 don't support UTF-16 or UTF-8 file names, so they must get file
1450 names encoded in the ANSI codepage. To facilitate using these
1451 libraries with file names that are not encodable in the ANSI
1452 codepage, use the function ansi_encode_filename, which will try
1453 to use the short 8+3 alias of a file name if that file name is
1454 not encodable in the ANSI codepage. See image.c and gnutls.c for
1455 examples of how this should be done.
1456
1457 . Running subprocesses in non-ASCII directories and with non-ASCII
1458 file arguments is limited to the current codepage (even though
1459 Emacs is perfectly capable of finding an executable program file
a3c3a662 1460 in a directory whose name cannot be encoded in the current
0cd7a14e
EZ		 1461 codepage). This is because the command-line arguments are
1462 encoded _before_ they get to the w32-specific level, and the
1463 encoding is not known in advance (it doesn't have to be the
1464 current ANSI codepage), so w32proc.c functions cannot re-encode
1465 them in UTF-16. This should be fixed, but will also require
1466 changes in cmdproxy. The current limitation is not terribly bad
1467 anyway, since very few, if any, Windows console programs that are
1468 likely to be invoked by Emacs support UTF-16 encoded command
1469 lines.
1470
1471 . For similar reasons, server.el and emacsclient are also limited
1472 to the current ANSI codepage for now.
1473
080fd649
EZ		 1474 . Emacs itself can only handle command-line arguments encoded in
1475 the current codepage.
1476
1477 . Turning on w32-unicode-filename on Windows 9X (if it at all
a3c3a662
EZ		 1478 works) requires UNICOWS.DLL, which is thus a requirement even in
1479 non-GUI sessions, something the we previously avoided. */
0cd7a14e
EZ		 1480
1481\f
1482
c3e9160b
EZ		 1483/* Converting file names from UTF-8 to either UTF-16 or the ANSI
1484 codepage defined by file-name-coding-system. */
1485
1486/* Current codepage for encoding file names. */
1487static int file_name_codepage;
1488
1489/* Produce a Windows ANSI codepage suitable for encoding file names.
1490 Return the information about that codepage in CP_INFO. */
1491static int
1492codepage_for_filenames (CPINFO *cp_info)
1493{
1494 /* A simple cache to avoid calling GetCPInfo every time we need to
1495 encode/decode a file name. The file-name encoding is not
1496 supposed to be changed too frequently, if ever. */
1497 static Lisp_Object last_file_name_encoding;
1498 static CPINFO cp;
1499 Lisp_Object current_encoding;
1500
1501 current_encoding = Vfile_name_coding_system;
1502 if (NILP (current_encoding))
1503 current_encoding = Vdefault_file_name_coding_system;
1504
1505 if (!EQ (last_file_name_encoding, current_encoding))
1506 {
1507 /* Default to the current ANSI codepage. */
1508 file_name_codepage = w32_ansi_code_page;
1509
1510 if (NILP (current_encoding))
1511 {
1512 char *cpname = SDATA (SYMBOL_NAME (current_encoding));
1513 char *cp = NULL, *end;
1514 int cpnum;
1515
1516 if (strncmp (cpname, "cp", 2) == 0)
1517 cp = cpname + 2;
1518 else if (strncmp (cpname, "windows-", 8) == 0)
1519 cp = cpname + 8;
1520
1521 if (cp)
1522 {
1523 end = cp;
1524 cpnum = strtol (cp, &end, 10);
1525 if (cpnum && *end == '\0' && end - cp >= 2)
1526 file_name_codepage = cpnum;
1527 }
1528 }
1529
1530 if (!file_name_codepage)
1531 file_name_codepage = CP_ACP; /* CP_ACP = 0, but let's not assume that */
1532
1533 if (!GetCPInfo (file_name_codepage, &cp))
1534 {
1535 file_name_codepage = CP_ACP;
1536 if (!GetCPInfo (file_name_codepage, &cp))
1537 emacs_abort ();
1538 }
1539 }
1540 if (cp_info)
1541 *cp_info = cp;
1542
1543 return file_name_codepage;
1544}
1545
2d716d75 1546int
03d58cca
EZ		 1547filename_to_utf16 (const char *fn_in, wchar_t *fn_out)
1548{
829f4f22
EZ		 1549 int result = pMultiByteToWideChar (CP_UTF8, MB_ERR_INVALID_CHARS, fn_in, -1,
1550 fn_out, MAX_PATH);
03d58cca
EZ		 1551
1552 if (!result)
1553 {
1554 DWORD err = GetLastError ();
1555
1556 switch (err)
1557 {
1558 case ERROR_INVALID_FLAGS:
1559 case ERROR_INVALID_PARAMETER:
1560 errno = EINVAL;
1561 break;
1562 case ERROR_INSUFFICIENT_BUFFER:
1563 case ERROR_NO_UNICODE_TRANSLATION:
1564 default:
1565 errno = ENOENT;
1566 break;
1567 }
1568 return -1;
1569 }
1570 return 0;
1571}
1572
2d716d75 1573int
03d58cca
EZ		 1574filename_from_utf16 (const wchar_t *fn_in, char *fn_out)
1575{
829f4f22
EZ		 1576 int result = pWideCharToMultiByte (CP_UTF8, 0, fn_in, -1,
1577 fn_out, MAX_UTF8_PATH, NULL, NULL);
c3e9160b
EZ		 1578
1579 if (!result)
1580 {
1581 DWORD err = GetLastError ();
1582
1583 switch (err)
1584 {
1585 case ERROR_INVALID_FLAGS:
1586 case ERROR_INVALID_PARAMETER:
1587 errno = EINVAL;
1588 break;
1589 case ERROR_INSUFFICIENT_BUFFER:
1590 case ERROR_NO_UNICODE_TRANSLATION:
1591 default:
1592 errno = ENOENT;
1593 break;
1594 }
1595 return -1;
1596 }
1597 return 0;
03d58cca
EZ		 1598}
1599
2d716d75 1600int
03d58cca
EZ		 1601filename_to_ansi (const char *fn_in, char *fn_out)
1602{
80fcb9d2 1603 wchar_t fn_utf16[MAX_PATH];
03d58cca
EZ		 1604
1605 if (filename_to_utf16 (fn_in, fn_utf16) == 0)
1606 {
c3e9160b
EZ		 1607 int result;
1608 int codepage = codepage_for_filenames (NULL);
03d58cca 1609
829f4f22
EZ		 1610 result = pWideCharToMultiByte (codepage, 0, fn_utf16, -1,
1611 fn_out, MAX_PATH, NULL, NULL);
03d58cca
EZ		 1612 if (!result)
1613 {
1614 DWORD err = GetLastError ();
1615
1616 switch (err)
1617 {
1618 case ERROR_INVALID_FLAGS:
1619 case ERROR_INVALID_PARAMETER:
1620 errno = EINVAL;
1621 break;
1622 case ERROR_INSUFFICIENT_BUFFER:
1623 case ERROR_NO_UNICODE_TRANSLATION:
1624 default:
1625 errno = ENOENT;
1626 break;
1627 }
1628 return -1;
1629 }
1630 return 0;
1631 }
c3e9160b 1632 return -1;
03d58cca
EZ		 1633}
1634
1fd201bb 1635int
03d58cca
EZ		 1636filename_from_ansi (const char *fn_in, char *fn_out)
1637{
80fcb9d2 1638 wchar_t fn_utf16[MAX_PATH];
c3e9160b 1639 int codepage = codepage_for_filenames (NULL);
829f4f22
EZ		 1640 int result = pMultiByteToWideChar (codepage, MB_ERR_INVALID_CHARS, fn_in, -1,
1641 fn_utf16, MAX_PATH);
c3e9160b
EZ		 1642
1643 if (!result)
1644 {
1645 DWORD err = GetLastError ();
1646
1647 switch (err)
1648 {
1649 case ERROR_INVALID_FLAGS:
1650 case ERROR_INVALID_PARAMETER:
1651 errno = EINVAL;
1652 break;
1653 case ERROR_INSUFFICIENT_BUFFER:
1654 case ERROR_NO_UNICODE_TRANSLATION:
1655 default:
1656 errno = ENOENT;
1657 break;
1658 }
1659 return -1;
1660 }
1661 return filename_from_utf16 (fn_utf16, fn_out);
03d58cca
EZ		 1662}
1663
1664\f
1665
5c4a19a9 1666/* The directory where we started, in UTF-8. */
03d58cca 1667static char startup_dir[MAX_UTF8_PATH];
00b3b7b3 1668
95ed0025 1669/* Get the current working directory. */
480b0c5b 1670char *
ec84768f 1671getcwd (char *dir, int dirsize)
95ed0025 1672{
9239d970
PE		 1673 if (!dirsize)
1674 {
1675 errno = EINVAL;
1676 return NULL;
1677 }
1678 if (dirsize <= strlen (startup_dir))
1679 {
1680 errno = ERANGE;
1681 return NULL;
1682 }
76b3903d 1683#if 0
480b0c5b
GV		 1684 if (GetCurrentDirectory (MAXPATHLEN, dir) > 0)
1685 return dir;
1686 return NULL;
76b3903d 1687#else
8d38f461
EZ		 1688 /* Emacs doesn't actually change directory itself, it stays in the
1689 same directory where it was started. */
76b3903d
GV		 1690 strcpy (dir, startup_dir);
1691 return dir;
1692#endif
95ed0025
RS		 1693}
1694
95ed0025 1695/* Emulate getloadavg. */
ad9e2d54
EZ		 1696
1697struct load_sample {
1698 time_t sample_time;
1699 ULONGLONG idle;
1700 ULONGLONG kernel;
1701 ULONGLONG user;
1702};
1703
1704/* Number of processors on this machine. */
1705static unsigned num_of_processors;
1706
1707/* We maintain 1-sec samples for the last 16 minutes in a circular buffer. */
1708static struct load_sample samples[16*60];
1709static int first_idx = -1, last_idx = -1;
1710static int max_idx = sizeof (samples) / sizeof (samples[0]);
1711
1712static int
1713buf_next (int from)
1714{
1715 int next_idx = from + 1;
1716
1717 if (next_idx >= max_idx)
1718 next_idx = 0;
1719
1720 return next_idx;
1721}
1722
1723static int
1724buf_prev (int from)
1725{
1726 int prev_idx = from - 1;
1727
1728 if (prev_idx < 0)
1729 prev_idx = max_idx - 1;
1730
1731 return prev_idx;
1732}
1733
1734static void
1735sample_system_load (ULONGLONG *idle, ULONGLONG *kernel, ULONGLONG *user)
1736{
1737 SYSTEM_INFO sysinfo;
1738 FILETIME ft_idle, ft_user, ft_kernel;
1739
1740 /* Initialize the number of processors on this machine. */
1741 if (num_of_processors <= 0)
1742 {
1743 get_native_system_info (&sysinfo);
1744 num_of_processors = sysinfo.dwNumberOfProcessors;
1745 if (num_of_processors <= 0)
1746 {
1747 GetSystemInfo (&sysinfo);
1748 num_of_processors = sysinfo.dwNumberOfProcessors;
1749 }
1750 if (num_of_processors <= 0)
1751 num_of_processors = 1;
1752 }
1753
1754 /* TODO: Take into account threads that are ready to run, by
1755 sampling the "\System\Processor Queue Length" performance
1756 counter. The code below accounts only for threads that are
1757 actually running. */
1758
1759 if (get_system_times (&ft_idle, &ft_kernel, &ft_user))
1760 {
1761 ULARGE_INTEGER uidle, ukernel, uuser;
1762
1763 memcpy (&uidle, &ft_idle, sizeof (ft_idle));
1764 memcpy (&ukernel, &ft_kernel, sizeof (ft_kernel));
1765 memcpy (&uuser, &ft_user, sizeof (ft_user));
1766 *idle = uidle.QuadPart;
1767 *kernel = ukernel.QuadPart;
1768 *user = uuser.QuadPart;
1769 }
1770 else
1771 {
1772 *idle = 0;
1773 *kernel = 0;
1774 *user = 0;
1775 }
1776}
1777
1778/* Produce the load average for a given time interval, using the
1779 samples in the samples[] array. WHICH can be 0, 1, or 2, meaning
1780 1-minute, 5-minute, or 15-minute average, respectively. */
1781static double
1782getavg (int which)
1783{
1784 double retval = -1.0;
1785 double tdiff;
1786 int idx;
1787 double span = (which == 0 ? 1.0 : (which == 1 ? 5.0 : 15.0)) * 60;
1788 time_t now = samples[last_idx].sample_time;
1789
1790 if (first_idx != last_idx)
1791 {
1792 for (idx = buf_prev (last_idx); ; idx = buf_prev (idx))
1793 {
1794 tdiff = difftime (now, samples[idx].sample_time);
1795 if (tdiff >= span - 2*DBL_EPSILON*now)
1796 {
1797 long double sys =
1798 samples[last_idx].kernel + samples[last_idx].user
1799 - (samples[idx].kernel + samples[idx].user);
1800 long double idl = samples[last_idx].idle - samples[idx].idle;
1801
1802 retval = (1.0 - idl / sys) * num_of_processors;
1803 break;
1804 }
1805 if (idx == first_idx)
1806 break;
1807 }
1808 }
1809
1810 return retval;
1811}
1812
95ed0025
RS		 1813int
1814getloadavg (double loadavg[], int nelem)
1815{
ad9e2d54
EZ		 1816 int elem;
1817 ULONGLONG idle, kernel, user;
1818 time_t now = time (NULL);
1819
60e62dc5
EZ		 1820 /* If system time jumped back for some reason, delete all samples
1821 whose time is later than the current wall-clock time. This
1822 prevents load average figures from becoming frozen for prolonged
1823 periods of time, when system time is reset backwards. */
1824 if (last_idx >= 0)
1825 {
1826 while (difftime (now, samples[last_idx].sample_time) < -1.0)
1827 {
1828 if (last_idx == first_idx)
1829 {
1830 first_idx = last_idx = -1;
1831 break;
1832 }
1833 last_idx = buf_prev (last_idx);
1834 }
1835 }
1836
ad9e2d54
EZ		 1837 /* Store another sample. We ignore samples that are less than 1 sec
1838 apart. */
60e62dc5
EZ		 1839 if (last_idx < 0
1840 || (difftime (now, samples[last_idx].sample_time)
1841 >= 1.0 - 2*DBL_EPSILON*now))
ad9e2d54
EZ		 1842 {
1843 sample_system_load (&idle, &kernel, &user);
1844 last_idx = buf_next (last_idx);
1845 samples[last_idx].sample_time = now;
1846 samples[last_idx].idle = idle;
1847 samples[last_idx].kernel = kernel;
1848 samples[last_idx].user = user;
1849 /* If the buffer has more that 15 min worth of samples, discard
1850 the old ones. */
1851 if (first_idx == -1)
1852 first_idx = last_idx;
1853 while (first_idx != last_idx
1854 && (difftime (now, samples[first_idx].sample_time)
1855 >= 15.0*60 + 2*DBL_EPSILON*now))
1856 first_idx = buf_next (first_idx);
1857 }
95ed0025 1858
ad9e2d54 1859 for (elem = 0; elem < nelem; elem++)
95ed0025 1860 {
ad9e2d54
EZ		 1861 double avg = getavg (elem);
1862
1863 if (avg < 0)
1864 break;
1865 loadavg[elem] = avg;
95ed0025 1866 }
ad9e2d54
EZ		 1867
1868 return elem;
95ed0025
RS		 1869}
1870
480b0c5b 1871/* Emulate getpwuid, getpwnam and others. */
95ed0025 1872
051fe60d
GV		 1873#define PASSWD_FIELD_SIZE 256
1874
07f7980a
EZ		 1875static char dflt_passwd_name[PASSWD_FIELD_SIZE];
1876static char dflt_passwd_passwd[PASSWD_FIELD_SIZE];
1877static char dflt_passwd_gecos[PASSWD_FIELD_SIZE];
5c4a19a9
EZ		 1878static char dflt_passwd_dir[MAX_UTF8_PATH];
1879static char dflt_passwd_shell[MAX_UTF8_PATH];
95ed0025 1880
07f7980a 1881static struct passwd dflt_passwd =
95ed0025 1882{
07f7980a
EZ		 1883 dflt_passwd_name,
1884 dflt_passwd_passwd,
95ed0025
RS		 1885 0,
1886 0,
1887 0,
07f7980a
EZ		 1888 dflt_passwd_gecos,
1889 dflt_passwd_dir,
1890 dflt_passwd_shell,
95ed0025
RS		 1891};
1892
07f7980a
EZ		 1893static char dflt_group_name[GNLEN+1];
1894
1895static struct group dflt_group =
3d19b645 1896{
07f7980a
EZ		 1897 /* When group information is not available, we return this as the
1898 group for all files. */
1899 dflt_group_name,
1900 0,
3d19b645
LH		 1901};
1902
22749e9a 1903unsigned
b56ceb92 1904getuid (void)
177c0ea7 1905{
07f7980a 1906 return dflt_passwd.pw_uid;
480b0c5b
GV		 1907}
1908
22749e9a 1909unsigned
b56ceb92 1910geteuid (void)
177c0ea7 1911{
480b0c5b
GV		 1912 /* I could imagine arguing for checking to see whether the user is
1913 in the Administrators group and returning a UID of 0 for that
1914 case, but I don't know how wise that would be in the long run. */
177c0ea7 1915 return getuid ();
480b0c5b
GV		 1916}
1917
22749e9a 1918unsigned
b56ceb92 1919getgid (void)
177c0ea7 1920{
07f7980a 1921 return dflt_passwd.pw_gid;
480b0c5b
GV		 1922}
1923
22749e9a 1924unsigned
b56ceb92 1925getegid (void)
177c0ea7 1926{
480b0c5b
GV		 1927 return getgid ();
1928}
1929
95ed0025 1930struct passwd *
22749e9a 1931getpwuid (unsigned uid)
95ed0025 1932{
07f7980a
EZ		 1933 if (uid == dflt_passwd.pw_uid)
1934 return &dflt_passwd;
480b0c5b 1935 return NULL;
95ed0025
RS		 1936}
1937
3d19b645
LH		 1938struct group *
1939getgrgid (gid_t gid)
1940{
07f7980a 1941 return &dflt_group;
3d19b645
LH		 1942}
1943
95ed0025
RS		 1944struct passwd *
1945getpwnam (char *name)
1946{
1947 struct passwd *pw;
177c0ea7 1948
95ed0025
RS		 1949 pw = getpwuid (getuid ());
1950 if (!pw)
1951 return pw;
1952
05131107 1953 if (xstrcasecmp (name, pw->pw_name))
95ed0025
RS		 1954 return NULL;
1955
1956 return pw;
1957}
1958
bedf4aab 1959static void
b56ceb92 1960init_user_info (void)
95ed0025 1961{
480b0c5b
GV		 1962 /* Find the user's real name by opening the process token and
1963 looking up the name associated with the user-sid in that token.
1964
1965 Use the relative portion of the identifier authority value from
1966 the user-sid as the user id value (same for group id using the
1967 primary group sid from the process token). */
1968
07f7980a 1969 char uname[UNLEN+1], gname[GNLEN+1], domain[1025];
32cef06e 1970 DWORD ulength = sizeof (uname), dlength = sizeof (domain), needed;
07f7980a 1971 DWORD glength = sizeof (gname);
10aabbf9
JB		 1972 HANDLE token = NULL;
1973 SID_NAME_USE user_type;
32cef06e
EZ		 1974 unsigned char *buf = NULL;
1975 DWORD blen = 0;
634d3003
EZ		 1976 TOKEN_USER user_token;
1977 TOKEN_PRIMARY_GROUP group_token;
32cef06e 1978 BOOL result;
10aabbf9 1979
32cef06e
EZ		 1980 result = open_process_token (GetCurrentProcess (), TOKEN_QUERY, &token);
1981 if (result)
1982 {
1983 result = get_token_information (token, TokenUser, NULL, 0, &blen);
1984 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
1985 {
1986 buf = xmalloc (blen);
1987 result = get_token_information (token, TokenUser,
1988 (LPVOID)buf, blen, &needed);
1989 if (result)
1990 {
1991 memcpy (&user_token, buf, sizeof (user_token));
1992 result = lookup_account_sid (NULL, user_token.User.Sid,
1993 uname, &ulength,
1994 domain, &dlength, &user_type);
1995 }
1996 }
1997 else
1998 result = FALSE;
1999 }
2000 if (result)
d1c1c3d2 2001 {
07f7980a 2002 strcpy (dflt_passwd.pw_name, uname);
c617afce 2003 /* Determine a reasonable uid value. */
05131107 2004 if (xstrcasecmp ("administrator", uname) == 0)
480b0c5b 2005 {
07f7980a
EZ		 2006 dflt_passwd.pw_uid = 500; /* well-known Administrator uid */
2007 dflt_passwd.pw_gid = 513; /* well-known None gid */
480b0c5b
GV		 2008 }
2009 else
2010 {
ce0ee994
EZ		 2011 /* Use the last sub-authority value of the RID, the relative
2012 portion of the SID, as user/group ID. */
8aaaec6b 2013 dflt_passwd.pw_uid = get_rid (user_token.User.Sid);
480b0c5b 2014
8aaaec6b 2015 /* Get group id and name. */
32cef06e
EZ		 2016 result = get_token_information (token, TokenPrimaryGroup,
2017 (LPVOID)buf, blen, &needed);
2018 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
2019 {
2020 buf = xrealloc (buf, blen = needed);
2021 result = get_token_information (token, TokenPrimaryGroup,
2022 (LPVOID)buf, blen, &needed);
2023 }
2024 if (result)
480b0c5b 2025 {
634d3003 2026 memcpy (&group_token, buf, sizeof (group_token));
8aaaec6b 2027 dflt_passwd.pw_gid = get_rid (group_token.PrimaryGroup);
07f7980a 2028 dlength = sizeof (domain);
32cef06e
EZ		 2029 /* If we can get at the real Primary Group name, use that.
2030 Otherwise, the default group name was already set to
2031 "None" in globals_of_w32. */
07f7980a
EZ		 2032 if (lookup_account_sid (NULL, group_token.PrimaryGroup,
2033 gname, &glength, NULL, &dlength,
2034 &user_type))
2035 strcpy (dflt_group_name, gname);
480b0c5b
GV		 2036 }
2037 else
07f7980a 2038 dflt_passwd.pw_gid = dflt_passwd.pw_uid;
480b0c5b
GV		 2039 }
2040 }
2041 /* If security calls are not supported (presumably because we
32cef06e 2042 are running under Windows 9X), fallback to this: */
07f7980a 2043 else if (GetUserName (uname, &ulength))
480b0c5b 2044 {
07f7980a 2045 strcpy (dflt_passwd.pw_name, uname);
05131107 2046 if (xstrcasecmp ("administrator", uname) == 0)
07f7980a 2047 dflt_passwd.pw_uid = 0;
480b0c5b 2048 else
07f7980a
EZ		 2049 dflt_passwd.pw_uid = 123;
2050 dflt_passwd.pw_gid = dflt_passwd.pw_uid;
480b0c5b
GV		 2051 }
2052 else
2053 {
07f7980a
EZ		 2054 strcpy (dflt_passwd.pw_name, "unknown");
2055 dflt_passwd.pw_uid = 123;
2056 dflt_passwd.pw_gid = 123;
d1c1c3d2 2057 }
07f7980a 2058 dflt_group.gr_gid = dflt_passwd.pw_gid;
95ed0025 2059
480b0c5b 2060 /* Set dir and shell from environment variables. */
5c4a19a9
EZ		 2061 if (w32_unicode_filenames)
2062 {
2063 wchar_t *home = _wgetenv (L"HOME");
2064 wchar_t *shell = _wgetenv (L"SHELL");
2065
2066 /* Ensure HOME and SHELL are defined. */
2067 if (home == NULL)
2068 emacs_abort ();
2069 if (shell == NULL)
2070 emacs_abort ();
2071 filename_from_utf16 (home, dflt_passwd.pw_dir);
2072 filename_from_utf16 (shell, dflt_passwd.pw_shell);
2073 }
2074 else
2075 {
2076 char *home = getenv ("HOME");
2077 char *shell = getenv ("SHELL");
2078
2079 if (home == NULL)
2080 emacs_abort ();
2081 if (shell == NULL)
2082 emacs_abort ();
2083 filename_from_ansi (home, dflt_passwd.pw_dir);
2084 filename_from_ansi (shell, dflt_passwd.pw_shell);
2085 }
bd4a449f 2086
32cef06e 2087 xfree (buf);
480b0c5b
GV		 2088 if (token)
2089 CloseHandle (token);
95ed0025
RS		 2090}
2091
95ed0025 2092int
b56ceb92 2093random (void)
95ed0025 2094{
480b0c5b
GV		 2095 /* rand () on NT gives us 15 random bits...hack together 30 bits. */
2096 return ((rand () << 15) | rand ());
95ed0025
RS		 2097}
2098
95ed0025 2099void
480b0c5b 2100srandom (int seed)
95ed0025 2101{
480b0c5b 2102 srand (seed);
95ed0025
RS		 2103}
2104
6d2851de
EZ		 2105/* Return the maximum length in bytes of a multibyte character
2106 sequence encoded in the current ANSI codepage. This is required to
2107 correctly walk the encoded file names one character at a time. */
2108static int
2109max_filename_mbslen (void)
2110{
c3e9160b 2111 CPINFO cp_info;
6d2851de 2112
c3e9160b
EZ		 2113 codepage_for_filenames (&cp_info);
2114 return cp_info.MaxCharSize;
6d2851de 2115}
76b3903d 2116
1fd201bb
EZ		 2117/* Normalize filename by converting in-place all of its path
2118 separators to the separator specified by PATH_SEP. */
cbe39279
RS		 2119
2120static void
1fd201bb 2121normalize_filename (register char *fp, char path_sep)
cbe39279 2122{
1fd201bb 2123 char *p2;
e7ac588e 2124
5162ffce
MB		 2125 /* Always lower-case drive letters a-z, even if the filesystem
2126 preserves case in filenames.
2127 This is so filenames can be compared by string comparison
2128 functions that are case-sensitive. Even case-preserving filesystems
2129 do not distinguish case in drive letters. */
1fd201bb 2130 p2 = fp + 1;
6d2851de
EZ		 2131
2132 if (*p2 == ':' && *fp >= 'A' && *fp <= 'Z')
5162ffce
MB		 2133 {
2134 *fp += 'a' - 'A';
2135 fp += 2;
2136 }
2137
1fd201bb 2138 while (*fp)
cbe39279 2139 {
94ae1542 2140 if ((*fp == '/' || *fp == '\\') && *fp != path_sep)
1fd201bb
EZ		 2141 *fp = path_sep;
2142 fp++;
cbe39279 2143 }
cbe39279
RS		 2144}
2145
1fd201bb 2146/* Destructively turn backslashes into slashes. */
95ed0025 2147void
1fd201bb 2148dostounix_filename (register char *p)
95ed0025 2149{
1fd201bb 2150 normalize_filename (p, '/');
95ed0025
RS		 2151}
2152
480b0c5b 2153/* Destructively turn slashes into backslashes. */
95ed0025 2154void
b56ceb92 2155unixtodos_filename (register char *p)
95ed0025 2156{
1fd201bb 2157 normalize_filename (p, '\\');
95ed0025
RS		 2158}
2159
480b0c5b
GV		 2160/* Remove all CR's that are followed by a LF.
2161 (From msdos.c...probably should figure out a way to share it,
2162 although this code isn't going to ever change.) */
bedf4aab 2163static int
b56ceb92 2164crlf_to_lf (register int n, register unsigned char *buf)
35f0d482 2165{
480b0c5b
GV		 2166 unsigned char *np = buf;
2167 unsigned char *startp = buf;
2168 unsigned char *endp = buf + n;
35f0d482 2169
480b0c5b
GV		 2170 if (n == 0)
2171 return n;
2172 while (buf < endp - 1)
95ed0025 2173 {
480b0c5b
GV		 2174 if (*buf == 0x0d)
2175 {
2176 if (*(++buf) != 0x0a)
2177 *np++ = 0x0d;
2178 }
2179 else
2180 *np++ = *buf++;
95ed0025 2181 }
480b0c5b
GV		 2182 if (buf < endp)
2183 *np++ = *buf++;
2184 return np - startp;
95ed0025
RS		 2185}
2186
76b3903d
GV		 2187/* Parse the root part of file name, if present. Return length and
2188 optionally store pointer to char after root. */
2189static int
f5441ba4 2190parse_root (const char * name, const char ** pPath)
76b3903d 2191{
f5441ba4 2192 const char * start = name;
76b3903d
GV		 2193
2194 if (name == NULL)
2195 return 0;
2196
2197 /* find the root name of the volume if given */
2198 if (isalpha (name[0]) && name[1] == ':')
2199 {
2200 /* skip past drive specifier */
2201 name += 2;
2202 if (IS_DIRECTORY_SEP (name[0]))
2203 name++;
2204 }
2205 else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1]))
2206 {
2207 int slashes = 2;
806fed21 2208
76b3903d
GV		 2209 name += 2;
2210 do
2211 {
2212 if (IS_DIRECTORY_SEP (*name) && --slashes == 0)
2213 break;
1fd201bb 2214 name++;
76b3903d
GV		 2215 }
2216 while ( *name );
2217 if (IS_DIRECTORY_SEP (name[0]))
2218 name++;
2219 }
2220
2221 if (pPath)
2222 *pPath = name;
2223
2224 return name - start;
2225}
2226
2227/* Get long base name for name; name is assumed to be absolute. */
2228static int
2229get_long_basename (char * name, char * buf, int size)
2230{
afec5165 2231 HANDLE dir_handle = INVALID_HANDLE_VALUE;
1fd201bb 2232 char fname_utf8[MAX_UTF8_PATH];
76b3903d 2233 int len = 0;
4ba5c243 2234 int cstatus = -1;
76b3903d 2235
1fd201bb
EZ		 2236 /* Must be valid filename, no wild cards or other invalid characters. */
2237 if (strpbrk (name, "*?|<>\""))
bb1584c8
RS		 2238 return 0;
2239
1fd201bb 2240 if (w32_unicode_filenames)
76b3903d 2241 {
1fd201bb
EZ		 2242 wchar_t fname_utf16[MAX_PATH];
2243 WIN32_FIND_DATAW find_data_wide;
2244
2245 filename_to_utf16 (name, fname_utf16);
2246 dir_handle = FindFirstFileW (fname_utf16, &find_data_wide);
2247 if (dir_handle != INVALID_HANDLE_VALUE)
2248 cstatus = filename_from_utf16 (find_data_wide.cFileName, fname_utf8);
2249 }
2250 else
2251 {
2252 char fname_ansi[MAX_PATH];
2253 WIN32_FIND_DATAA find_data_ansi;
2254
2255 filename_to_ansi (name, fname_ansi);
afec5165
EZ		 2256 /* If the ANSI name includes ? characters, it is not encodable
2257 in the ANSI codepage. In that case, we deliver the question
2258 marks to the caller; calling FindFirstFileA in this case
2259 could return some unrelated file name in the same
2260 directory. */
2261 if (_mbspbrk (fname_ansi, "?"))
51caf502
EZ		 2262 {
2263 /* Find the basename of fname_ansi. */
2264 char *p = strrchr (fname_ansi, '\\');
2265
2266 if (!p)
2267 p = fname_ansi;
2268 else
2269 p++;
2270 cstatus = filename_from_ansi (p, fname_utf8);
2271 }
afec5165
EZ		 2272 else
2273 {
2274 dir_handle = FindFirstFileA (fname_ansi, &find_data_ansi);
2275 if (dir_handle != INVALID_HANDLE_VALUE)
2276 cstatus = filename_from_ansi (find_data_ansi.cFileName, fname_utf8);
2277 }
76b3903d 2278 }
1fd201bb
EZ		 2279
2280 if (cstatus == 0 && (len = strlen (fname_utf8)) < size)
2281 memcpy (buf, fname_utf8, len + 1);
2282 else
2283 len = 0;
2284
2285 if (dir_handle != INVALID_HANDLE_VALUE)
2286 FindClose (dir_handle);
2287
76b3903d
GV		 2288 return len;
2289}
2290
2291/* Get long name for file, if possible (assumed to be absolute). */
2292BOOL
2293w32_get_long_filename (char * name, char * buf, int size)
2294{
2295 char * o = buf;
2296 char * p;
f5441ba4 2297 const char * q;
1fd201bb 2298 char full[ MAX_UTF8_PATH ];
76b3903d
GV		 2299 int len;
2300
2301 len = strlen (name);
1fd201bb 2302 if (len >= MAX_UTF8_PATH)
76b3903d
GV		 2303 return FALSE;
2304
2305 /* Use local copy for destructive modification. */
2306 memcpy (full, name, len+1);
2307 unixtodos_filename (full);
2308
2309 /* Copy root part verbatim. */
f5441ba4 2310 len = parse_root (full, (const char **)&p);
76b3903d
GV		 2311 memcpy (o, full, len);
2312 o += len;
4f8ac0b2 2313 *o = '\0';
76b3903d
GV		 2314 size -= len;
2315
4f8ac0b2 2316 while (p != NULL && *p)
76b3903d
GV		 2317 {
2318 q = p;
1fd201bb 2319 p = strchr (q, '\\');
76b3903d
GV		 2320 if (p) *p = '\0';
2321 len = get_long_basename (full, o, size);
2322 if (len > 0)
2323 {
2324 o += len;
2325 size -= len;
2326 if (p != NULL)
2327 {
2328 *p++ = '\\';
2329 if (size < 2)
2330 return FALSE;
2331 *o++ = '\\';
2332 size--;
2333 *o = '\0';
2334 }
2335 }
2336 else
2337 return FALSE;
2338 }
76b3903d
GV		 2339
2340 return TRUE;
2341}
2342
1fd201bb
EZ		 2343unsigned int
2344w32_get_short_filename (char * name, char * buf, int size)
2345{
2346 if (w32_unicode_filenames)
2347 {
2348 wchar_t name_utf16[MAX_PATH], short_name[MAX_PATH];
2349 unsigned int retval;
2350
2351 filename_to_utf16 (name, name_utf16);
2352 retval = GetShortPathNameW (name_utf16, short_name, size);
2353 if (retval && retval < size)
2354 filename_from_utf16 (short_name, buf);
2355 return retval;
2356 }
2357 else
2358 {
2359 char name_ansi[MAX_PATH];
2360
2361 filename_to_ansi (name, name_ansi);
2362 return GetShortPathNameA (name_ansi, buf, size);
2363 }
2364}
2365
9ab69568
EZ		 2366/* Re-encode FILENAME, a UTF-8 encoded unibyte string, using the
2367 MS-Windows ANSI codepage. If FILENAME includes characters not
2368 supported by the ANSI codepage, return the 8+3 alias of FILENAME,
2369 if it exists. This is needed because the w32 build wants to
2370 support file names outside of the system locale, but image
2371 libraries typically don't support wide (a.k.a. "Unicode") APIs
2372 required for that. */
2373
2374Lisp_Object
2375ansi_encode_filename (Lisp_Object filename)
2376{
2377 Lisp_Object encoded_filename;
2378 char fname[MAX_PATH];
2379
2380 filename_to_ansi (SSDATA (filename), fname);
2381 if (_mbspbrk (fname, "?"))
2382 {
2383 char shortname[MAX_PATH];
2384
2385 if (w32_get_short_filename (SDATA (filename), shortname, MAX_PATH))
2386 {
2387 dostounix_filename (shortname);
2388 encoded_filename = build_string (shortname);
2389 }
2390 }
2391 else
2392 encoded_filename = build_unibyte_string (fname);
2393 return encoded_filename;
2394}
2395
bedf4aab 2396static int
9d3355d1
GV		 2397is_unc_volume (const char *filename)
2398{
2399 const char *ptr = filename;
2400
2401 if (!IS_DIRECTORY_SEP (ptr[0]) || !IS_DIRECTORY_SEP (ptr[1]) || !ptr[2])
2402 return 0;
2403
b1846422 2404 if (strpbrk (ptr + 2, "*?|<>\"\\/"))
9d3355d1
GV		 2405 return 0;
2406
2407 return 1;
2408}
76b3903d 2409
75ceee05
EZ		 2410/* Emulate the Posix unsetenv. */
2411int
2412unsetenv (const char *name)
2413{
2414 char *var;
2415 size_t name_len;
2416 int retval;
2417
2418 if (name == NULL || *name == '\0' || strchr (name, '=') != NULL)
2419 {
2420 errno = EINVAL;
2421 return -1;
2422 }
2423 name_len = strlen (name);
2424 /* MS docs says an environment variable cannot be longer than 32K. */
2425 if (name_len > 32767)
2426 {
2427 errno = ENOMEM;
a16e75cd 2428 return 0;
75ceee05
EZ		 2429 }
2430 /* It is safe to use 'alloca' with 32K size, since the stack is at
2431 least 2MB, and we set it to 8MB in the link command line. */
2432 var = alloca (name_len + 2);
a7f11948 2433 strncpy (var, name, name_len);
75ceee05
EZ		 2434 var[name_len++] = '=';
2435 var[name_len] = '\0';
2436 return _putenv (var);
2437}
2438
2439/* MS _putenv doesn't support removing a variable when the argument
2440 does not include the '=' character, so we fix that here. */
2441int
2442sys_putenv (char *str)
2443{
2444 const char *const name_end = strchr (str, '=');
2445
2446 if (name_end == NULL)
2447 {
2448 /* Remove the variable from the environment. */
2449 return unsetenv (str);
2450 }
2451
2452 return _putenv (str);
2453}
2454
480b0c5b 2455#define REG_ROOT "SOFTWARE\\GNU\\Emacs"
f332b293 2456
177c0ea7 2457LPBYTE
b56ceb92 2458w32_get_resource (char *key, LPDWORD lpdwtype)
f332b293
GV		 2459{
2460 LPBYTE lpvalue;
2461 HKEY hrootkey = NULL;
2462 DWORD cbData;
177c0ea7
JB		 2463
2464 /* Check both the current user and the local machine to see if
f332b293 2465 we have any resources. */
177c0ea7 2466
f332b293
GV		 2467 if (RegOpenKeyEx (HKEY_CURRENT_USER, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS)
2468 {
2469 lpvalue = NULL;
2470
177c0ea7 2471 if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS
23f86fce 2472 && (lpvalue = xmalloc (cbData)) != NULL
f332b293
GV		 2473 && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS)
2474 {
4da4d9bb 2475 RegCloseKey (hrootkey);
f332b293
GV		 2476 return (lpvalue);
2477 }
2478
70fdbb46 2479 xfree (lpvalue);
177c0ea7 2480
f332b293 2481 RegCloseKey (hrootkey);
177c0ea7
JB		 2482 }
2483
f332b293
GV		 2484 if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS)
2485 {
2486 lpvalue = NULL;
177c0ea7 2487
76b3903d 2488 if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS
23f86fce 2489 && (lpvalue = xmalloc (cbData)) != NULL
76b3903d 2490 && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS)
f332b293 2491 {
4da4d9bb 2492 RegCloseKey (hrootkey);
f332b293
GV		 2493 return (lpvalue);
2494 }
177c0ea7 2495
70fdbb46 2496 xfree (lpvalue);
177c0ea7 2497
f332b293 2498 RegCloseKey (hrootkey);
177c0ea7
JB		 2499 }
2500
f332b293
GV		 2501 return (NULL);
2502}
2503
080fd649
EZ		 2504/* The argv[] array holds ANSI-encoded strings, and so this function
2505 works with ANS_encoded strings. */
f332b293 2506void
aa7b87b0 2507init_environment (char ** argv)
f332b293 2508{
b3308d2e
KH		 2509 static const char * const tempdirs[] = {
2510 "$TMPDIR", "$TEMP", "$TMP", "c:/"
2511 };
2d5324c5 2512
b3308d2e 2513 int i;
2d5324c5 2514
b3308d2e
KH		 2515 const int imax = sizeof (tempdirs) / sizeof (tempdirs[0]);
2516
b1846422
EZ		 2517 /* Implementation note: This function explicitly works with ANSI
2518 file names, not with UTF-8 encoded file names. This is because
2519 this function pushes variables into the Emacs's environment, and
2520 the environment variables are always assumed to be in the
2521 locale-specific encoding. Do NOT call any functions that accept
2522 UTF-8 file names from this function! */
2523
b3308d2e
KH		 2524 /* Make sure they have a usable $TMPDIR. Many Emacs functions use
2525 temporary files and assume "/tmp" if $TMPDIR is unset, which
2526 will break on DOS/Windows. Refuse to work if we cannot find
2527 a directory, not even "c:/", usable for that purpose. */
2528 for (i = 0; i < imax ; i++)
2529 {
2530 const char *tmp = tempdirs[i];
2531
2532 if (*tmp == '$')
2533 tmp = getenv (tmp + 1);
2534 /* Note that `access' can lie to us if the directory resides on a
2535 read-only filesystem, like CD-ROM or a write-protected floppy.
2536 The only way to be really sure is to actually create a file and
2537 see if it succeeds. But I think that's too much to ask. */
6dad7178 2538
b1846422
EZ		 2539 /* MSVCRT's _access crashes with D_OK, so we use our replacement. */
2540 if (tmp && sys_access (tmp, D_OK) == 0)
b3308d2e
KH		 2541 {
2542 char * var = alloca (strlen (tmp) + 8);
2543 sprintf (var, "TMPDIR=%s", tmp);
aca583b2 2544 _putenv (strdup (var));
b3308d2e
KH		 2545 break;
2546 }
2547 }
2548 if (i >= imax)
2549 cmd_error_internal
2550 (Fcons (Qerror,
2551 Fcons (build_string ("no usable temporary directories found!!"),
2552 Qnil)),
2553 "While setting TMPDIR: ");
2554
ca149beb
AI		 2555 /* Check for environment variables and use registry settings if they
2556 don't exist. Fallback on default values where applicable. */
f332b293 2557 {
480b0c5b
GV		 2558 int i;
2559 LPBYTE lpval;
2560 DWORD dwType;
69fb0241 2561 char locale_name[32];
2d5324c5 2562 char default_home[MAX_PATH];
fdc5744d 2563 int appdata = 0;
f332b293 2564
e00b99c8 2565 static const struct env_entry
ca149beb
AI		 2566 {
2567 char * name;
2568 char * def_value;
e00b99c8 2569 } dflt_envvars[] =
ca149beb 2570 {
76151e2c
EZ		 2571 /* If the default value is NULL, we will use the value from the
2572 outside environment or the Registry, but will not push the
2573 variable into the Emacs environment if it is defined neither
2574 in the Registry nor in the outside environment. */
ca149beb
AI		 2575 {"HOME", "C:/"},
2576 {"PRELOAD_WINSOCK", NULL},
2577 {"emacs_dir", "C:/emacs"},
76151e2c 2578 {"EMACSLOADPATH", NULL},
7d9fb4de 2579 {"SHELL", "cmdproxy.exe"}, /* perhaps it is somewhere on PATH */
76151e2c
EZ		 2580 {"EMACSDATA", NULL},
2581 {"EMACSPATH", NULL},
2582 {"INFOPATH", NULL},
2583 {"EMACSDOC", NULL},
69fb0241
JR		 2584 {"TERM", "cmd"},
2585 {"LANG", NULL},
480b0c5b
GV		 2586 };
2587
ed3751c8 2588#define N_ENV_VARS sizeof (dflt_envvars)/sizeof (dflt_envvars[0])
e00b99c8
EZ		 2589
2590 /* We need to copy dflt_envvars[] and work on the copy because we
2591 don't want the dumped Emacs to inherit the values of
2592 environment variables we saw during dumping (which could be on
2593 a different system). The defaults above must be left intact. */
2594 struct env_entry env_vars[N_ENV_VARS];
2595
2596 for (i = 0; i < N_ENV_VARS; i++)
2597 env_vars[i] = dflt_envvars[i];
2598
2d5324c5
JR		 2599 /* For backwards compatibility, check if a .emacs file exists in C:/
2600 If not, then we can try to default to the appdata directory under the
2601 user's profile, which is more likely to be writable. */
b1846422 2602 if (sys_access ("C:/.emacs", F_OK) != 0)
94eab1c8
JB		 2603 {
2604 HRESULT profile_result;
2605 /* Dynamically load ShGetFolderPath, as it won't exist on versions
2606 of Windows 95 and NT4 that have not been updated to include
2607 MSIE 5. */
2608 ShGetFolderPath_fn get_folder_path;
2609 get_folder_path = (ShGetFolderPath_fn)
2610 GetProcAddress (GetModuleHandle ("shell32.dll"), "SHGetFolderPathA");
2611
2612 if (get_folder_path != NULL)
2613 {
2614 profile_result = get_folder_path (NULL, CSIDL_APPDATA, NULL,
2615 0, default_home);
2d5324c5 2616
94eab1c8
JB		 2617 /* If we can't get the appdata dir, revert to old behavior. */
2618 if (profile_result == S_OK)
fdc5744d
JB		 2619 {
2620 env_vars[0].def_value = default_home;
2621 appdata = 1;
2622 }
94eab1c8
JB		 2623 }
2624 }
2d5324c5 2625
69fb0241
JR		 2626 /* Get default locale info and use it for LANG. */
2627 if (GetLocaleInfo (LOCALE_USER_DEFAULT,
2628 LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP,
2629 locale_name, sizeof (locale_name)))
2630 {
e00b99c8 2631 for (i = 0; i < N_ENV_VARS; i++)
69fb0241
JR		 2632 {
2633 if (strcmp (env_vars[i].name, "LANG") == 0)
2634 {
2635 env_vars[i].def_value = locale_name;
2636 break;
2637 }
2638 }
2639 }
2640
ca149beb
AI		 2641#define SET_ENV_BUF_SIZE (4 * MAX_PATH) /* to cover EMACSLOADPATH */
2642
2643 /* Treat emacs_dir specially: set it unconditionally based on our
76151e2c 2644 location. */
ca149beb
AI		 2645 {
2646 char *p;
2647 char modname[MAX_PATH];
2648
080fd649 2649 if (!GetModuleFileNameA (NULL, modname, MAX_PATH))
1088b922 2650 emacs_abort ();
6ee4509a 2651 if ((p = _mbsrchr (modname, '\\')) == NULL)
1088b922 2652 emacs_abort ();
ca149beb
AI		 2653 *p = 0;
2654
7d9fb4de
EZ		 2655 if ((p = _mbsrchr (modname, '\\'))
2656 /* From bin means installed Emacs, from src means uninstalled. */
2657 && (xstrcasecmp (p, "\\bin") == 0 || xstrcasecmp (p, "\\src") == 0))
ca149beb
AI		 2658 {
2659 char buf[SET_ENV_BUF_SIZE];
7d9fb4de 2660 int within_build_tree = xstrcasecmp (p, "\\src") == 0;
ca149beb
AI		 2661
2662 *p = 0;
6ee4509a 2663 for (p = modname; *p; p = CharNext (p))
ca149beb 2664 if (*p == '\\') *p = '/';
177c0ea7 2665
ed3751c8 2666 _snprintf (buf, sizeof (buf)-1, "emacs_dir=%s", modname);
a302c7ae 2667 _putenv (strdup (buf));
7d9fb4de
EZ		 2668 /* If we are running from the Posix-like build tree, define
2669 SHELL to point to our own cmdproxy. The loop below will
2670 then disregard PATH_EXEC and the default value. */
2671 if (within_build_tree)
2672 {
2673 _snprintf (buf, sizeof (buf) - 1,
2674 "SHELL=%s/nt/cmdproxy.exe", modname);
2675 _putenv (strdup (buf));
2676 }
ca149beb
AI		 2677 }
2678 }
2679
e00b99c8 2680 for (i = 0; i < N_ENV_VARS; i++)
f332b293 2681 {
ca149beb 2682 if (!getenv (env_vars[i].name))
480b0c5b 2683 {
ca149beb 2684 int dont_free = 0;
7d9fb4de 2685 char bufc[SET_ENV_BUF_SIZE];
480b0c5b 2686
aa5ee2a3
JB		 2687 if ((lpval = w32_get_resource (env_vars[i].name, &dwType)) == NULL
2688 /* Also ignore empty environment variables. */
2689 || *lpval == 0)
ca149beb 2690 {
70fdbb46 2691 xfree (lpval);
ca149beb 2692 dont_free = 1;
7d9fb4de
EZ		 2693 if (strcmp (env_vars[i].name, "SHELL") == 0)
2694 {
2695 /* Look for cmdproxy.exe in every directory in
2696 PATH_EXEC. FIXME: This does not find cmdproxy
2697 in nt/ when we run uninstalled. */
2698 char fname[MAX_PATH];
2699 const char *pstart = PATH_EXEC, *pend;
2700
2701 do {
2702 pend = _mbschr (pstart, ';');
2703 if (!pend)
2704 pend = pstart + strlen (pstart);
2705 /* Be defensive against series of ;;; characters. */
2706 if (pend > pstart)
2707 {
2708 strncpy (fname, pstart, pend - pstart);
2709 fname[pend - pstart] = '/';
2710 strcpy (&fname[pend - pstart + 1], "cmdproxy.exe");
2711 ExpandEnvironmentStrings ((LPSTR) fname, bufc,
2712 sizeof (bufc));
b1846422 2713 if (sys_access (bufc, F_OK) == 0)
7d9fb4de
EZ		 2714 {
2715 lpval = bufc;
2716 dwType = REG_SZ;
2717 break;
2718 }
2719 }
2720 if (*pend)
2721 pstart = pend + 1;
2722 else
2723 pstart = pend;
2724 if (!*pstart)
2725 {
2726 /* If not found in any directory, use the
2727 default as the last resort. */
2728 lpval = env_vars[i].def_value;
2729 dwType = REG_EXPAND_SZ;
2730 }
2731 } while (*pstart);
2732 }
2733 else
2734 {
2735 lpval = env_vars[i].def_value;
2736 dwType = REG_EXPAND_SZ;
2737 }
2738 if (strcmp (env_vars[i].name, "HOME") == 0 && !appdata)
3438fe21
EZ		 2739 Vdelayed_warnings_list
2740 = Fcons (listn (CONSTYPE_HEAP, 2,
073c88c2 2741 intern ("initialization"),
694b6c97 2742 build_string ("Setting HOME to C:\\ by default is deprecated")),
073c88c2 2743 Vdelayed_warnings_list);
480b0c5b 2744 }
ca149beb
AI		 2745
2746 if (lpval)
480b0c5b 2747 {
892eb237 2748 char buf1[SET_ENV_BUF_SIZE], buf2[SET_ENV_BUF_SIZE];
ca149beb 2749
892eb237 2750 if (dwType == REG_EXPAND_SZ)
ed3751c8 2751 ExpandEnvironmentStrings ((LPSTR) lpval, buf1, sizeof (buf1));
ca149beb 2752 else if (dwType == REG_SZ)
892eb237
EZ		 2753 strcpy (buf1, lpval);
2754 if (dwType == REG_EXPAND_SZ || dwType == REG_SZ)
ca149beb 2755 {
ed3751c8 2756 _snprintf (buf2, sizeof (buf2)-1, "%s=%s", env_vars[i].name,
892eb237
EZ		 2757 buf1);
2758 _putenv (strdup (buf2));
ca149beb 2759 }
f332b293 2760
ca149beb
AI		 2761 if (!dont_free)
2762 xfree (lpval);
2763 }
480b0c5b
GV		 2764 }
2765 }
2766 }
2767
75b08edb
GV		 2768 /* Rebuild system configuration to reflect invoking system. */
2769 Vsystem_configuration = build_string (EMACS_CONFIGURATION);
2770
76b3903d
GV		 2771 /* Another special case: on NT, the PATH variable is actually named
2772 "Path" although cmd.exe (perhaps NT itself) arranges for
2773 environment variable lookup and setting to be case insensitive.
2774 However, Emacs assumes a fully case sensitive environment, so we
2775 need to change "Path" to "PATH" to match the expectations of
2776 various elisp packages. We do this by the sneaky method of
2777 modifying the string in the C runtime environ entry.
2778
2779 The same applies to COMSPEC. */
2780 {
2781 char ** envp;
2782
2783 for (envp = environ; *envp; envp++)
2784 if (_strnicmp (*envp, "PATH=", 5) == 0)
2785 memcpy (*envp, "PATH=", 5);
2786 else if (_strnicmp (*envp, "COMSPEC=", 8) == 0)
2787 memcpy (*envp, "COMSPEC=", 8);
2788 }
2789
9239d970 2790 /* Remember the initial working directory for getcwd. */
6dad7178
EZ		 2791 /* FIXME: Do we need to resolve possible symlinks in startup_dir?
2792 Does it matter anywhere in Emacs? */
5c4a19a9
EZ		 2793 if (w32_unicode_filenames)
2794 {
2795 wchar_t wstartup_dir[MAX_PATH];
2796
2797 if (!GetCurrentDirectoryW (MAX_PATH, wstartup_dir))
2798 emacs_abort ();
2799 filename_from_utf16 (wstartup_dir, startup_dir);
2800 }
2801 else
2802 {
2803 char astartup_dir[MAX_PATH];
2804
2805 if (!GetCurrentDirectoryA (MAX_PATH, astartup_dir))
2806 emacs_abort ();
2807 filename_from_ansi (astartup_dir, startup_dir);
2808 }
76b3903d
GV		 2809
2810 {
aa7b87b0 2811 static char modname[MAX_PATH];
76b3903d 2812
080fd649 2813 if (!GetModuleFileNameA (NULL, modname, MAX_PATH))
1088b922 2814 emacs_abort ();
aa7b87b0 2815 argv[0] = modname;
76b3903d
GV		 2816 }
2817
20af4831
JR		 2818 /* Determine if there is a middle mouse button, to allow parse_button
2819 to decide whether right mouse events should be mouse-2 or
2820 mouse-3. */
e0c181dd 2821 w32_num_mouse_buttons = GetSystemMetrics (SM_CMOUSEBUTTONS);
20af4831 2822
480b0c5b
GV		 2823 init_user_info ();
2824}
2825
6dad7178
EZ		 2826/* Called from expand-file-name when default-directory is not a string. */
2827
bf794306
EZ		 2828char *
2829emacs_root_dir (void)
2830{
b1846422 2831 static char root_dir[MAX_UTF8_PATH];
bf794306
EZ		 2832 const char *p;
2833
2834 p = getenv ("emacs_dir");
2835 if (p == NULL)
1088b922 2836 emacs_abort ();
b1846422 2837 filename_from_ansi (p, root_dir);
bf794306 2838 root_dir[parse_root (root_dir, NULL)] = '\0';
1fd201bb 2839 dostounix_filename (root_dir);
bf794306
EZ		 2840 return root_dir;
2841}
2842
35f0d482
KH		 2843#include <sys/timeb.h>
2844
2845/* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */
97dababa 2846int
e2d8a6f0 2847gettimeofday (struct timeval *__restrict tv, struct timezone *__restrict tz)
35f0d482 2848{
6e602566 2849 struct _timeb tb;
35f0d482
KH		 2850 _ftime (&tb);
2851
2852 tv->tv_sec = tb.time;
2853 tv->tv_usec = tb.millitm * 1000L;
97a93095
EZ		 2854 /* Implementation note: _ftime sometimes doesn't update the dstflag
2855 according to the new timezone when the system timezone is
2856 changed. We could fix that by using GetSystemTime and
2857 GetTimeZoneInformation, but that doesn't seem necessary, since
2858 Emacs always calls gettimeofday with the 2nd argument NULL (see
e9a9ae03 2859 current_emacs_time). */
177c0ea7 2860 if (tz)
35f0d482
KH		 2861 {
2862 tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */
2863 tz->tz_dsttime = tb.dstflag; /* type of dst correction */
2864 }
97dababa 2865 return 0;
35f0d482 2866}
35f0d482 2867
388cdec0
EZ		 2868/* Emulate fdutimens. */
2869
2870/* Set the access and modification time stamps of FD (a.k.a. FILE) to be
2871 TIMESPEC[0] and TIMESPEC[1], respectively.
2872 FD must be either negative -- in which case it is ignored --
2873 or a file descriptor that is open on FILE.
2874 If FD is nonnegative, then FILE can be NULL, which means
2875 use just futimes instead of utimes.
2876 If TIMESPEC is null, FAIL.
2877 Return 0 on success, -1 (setting errno) on failure. */
2878
2879int
2880fdutimens (int fd, char const *file, struct timespec const timespec[2])
2881{
388cdec0
EZ		 2882 if (!timespec)
2883 {
2884 errno = ENOSYS;
2885 return -1;
2886 }
2887 if (fd < 0 && !file)
2888 {
2889 errno = EBADF;
2890 return -1;
2891 }
b34454d0
EZ		 2892 /* _futime's prototype defines 2nd arg as having the type 'struct
2893 _utimbuf', while utime needs to accept 'struct utimbuf' for
2894 compatibility with Posix. So we need to use 2 different (but
2895 equivalent) types to avoid compiler warnings, sigh. */
388cdec0 2896 if (fd >= 0)
b34454d0
EZ		 2897 {
2898 struct _utimbuf _ut;
2899
2900 _ut.actime = timespec[0].tv_sec;
2901 _ut.modtime = timespec[1].tv_sec;
2902 return _futime (fd, &_ut);
2903 }
388cdec0 2904 else
b34454d0
EZ		 2905 {
2906 struct utimbuf ut;
2907
2908 ut.actime = timespec[0].tv_sec;
2909 ut.modtime = timespec[1].tv_sec;
2910 /* Call 'utime', which is implemented below, not the MS library
2911 function, which fails on directories. */
2912 return utime (file, &ut);
2913 }
388cdec0
EZ		 2914}
2915
2916
480b0c5b 2917/* ------------------------------------------------------------------------- */
b46a6a83 2918/* IO support and wrapper functions for the Windows API. */
480b0c5b 2919/* ------------------------------------------------------------------------- */
95ed0025 2920
480b0c5b 2921/* Place a wrapper around the MSVC version of ctime. It returns NULL
177c0ea7 2922 on network directories, so we handle that case here.
480b0c5b
GV		 2923 (Ulrich Leodolter, 1/11/95). */
2924char *
2925sys_ctime (const time_t *t)
2926{
2927 char *str = (char *) ctime (t);
2928 return (str ? str : "Sun Jan 01 00:00:00 1970");
2929}
2930
2931/* Emulate sleep...we could have done this with a define, but that
2932 would necessitate including windows.h in the files that used it.
2933 This is much easier. */
2934void
2935sys_sleep (int seconds)
2936{
2937 Sleep (seconds * 1000);
2938}
2939
76b3903d 2940/* Internal MSVC functions for low-level descriptor munging */
480b0c5b
GV		 2941extern int __cdecl _set_osfhnd (int fd, long h);
2942extern int __cdecl _free_osfhnd (int fd);
2943
2944/* parallel array of private info on file handles */
2945filedesc fd_info [ MAXDESC ];
2946
76b3903d
GV		 2947typedef struct volume_info_data {
2948 struct volume_info_data * next;
2949
2950 /* time when info was obtained */
2951 DWORD timestamp;
2952
2953 /* actual volume info */
2954 char * root_dir;
480b0c5b
GV		 2955 DWORD serialnum;
2956 DWORD maxcomp;
2957 DWORD flags;
76b3903d
GV		 2958 char * name;
2959 char * type;
2960} volume_info_data;
2961
2962/* Global referenced by various functions. */
2963static volume_info_data volume_info;
2964
2965/* Vector to indicate which drives are local and fixed (for which cached
2966 data never expires). */
2967static BOOL fixed_drives[26];
2968
2969/* Consider cached volume information to be stale if older than 10s,
2970 at least for non-local drives. Info for fixed drives is never stale. */
2971#define DRIVE_INDEX( c ) ( (c) <= 'Z' ? (c) - 'A' : (c) - 'a' )
2972#define VOLINFO_STILL_VALID( root_dir, info ) \
2973 ( ( isalpha (root_dir[0]) && \
2974 fixed_drives[ DRIVE_INDEX (root_dir[0]) ] ) \
2975 || GetTickCount () - info->timestamp < 10000 )
2976
2977/* Cache support functions. */
2978
2979/* Simple linked list with linear search is sufficient. */
2980static volume_info_data *volume_cache = NULL;
2981
2982static volume_info_data *
2983lookup_volume_info (char * root_dir)
2984{
2985 volume_info_data * info;
2986
2987 for (info = volume_cache; info; info = info->next)
05131107 2988 if (xstrcasecmp (info->root_dir, root_dir) == 0)
76b3903d
GV		 2989 break;
2990 return info;
2991}
2992
2993static void
2994add_volume_info (char * root_dir, volume_info_data * info)
2995{
a302c7ae 2996 info->root_dir = xstrdup (root_dir);
f5441ba4 2997 unixtodos_filename (info->root_dir);
76b3903d
GV		 2998 info->next = volume_cache;
2999 volume_cache = info;
3000}
3001
3002
3003/* Wrapper for GetVolumeInformation, which uses caching to avoid
3004 performance penalty (~2ms on 486 for local drives, 7.5ms for local
3005 cdrom drive, ~5-10ms or more for remote drives on LAN). */
bedf4aab 3006static volume_info_data *
76b3903d
GV		 3007GetCachedVolumeInformation (char * root_dir)
3008{
3009 volume_info_data * info;
f5441ba4
EZ		 3010 char default_root[ MAX_UTF8_PATH ];
3011 char name[MAX_PATH+1];
3012 char type[MAX_PATH+1];
76b3903d
GV		 3013
3014 /* NULL for root_dir means use root from current directory. */
3015 if (root_dir == NULL)
3016 {
f5441ba4
EZ		 3017 if (w32_unicode_filenames)
3018 {
3019 wchar_t curdirw[MAX_PATH];
3020
3021 if (GetCurrentDirectoryW (MAX_PATH, curdirw) == 0)
3022 return NULL;
3023 filename_from_utf16 (curdirw, default_root);
3024 }
3025 else
3026 {
3027 char curdira[MAX_PATH];
3028
3029 if (GetCurrentDirectoryA (MAX_PATH, curdira) == 0)
3030 return NULL;
3031 filename_from_ansi (curdira, default_root);
3032 }
3033 parse_root (default_root, (const char **)&root_dir);
76b3903d
GV		 3034 *root_dir = 0;
3035 root_dir = default_root;
3036 }
3037
3038 /* Local fixed drives can be cached permanently. Removable drives
3039 cannot be cached permanently, since the volume name and serial
3040 number (if nothing else) can change. Remote drives should be
3041 treated as if they are removable, since there is no sure way to
3042 tell whether they are or not. Also, the UNC association of drive
3043 letters mapped to remote volumes can be changed at any time (even
3044 by other processes) without notice.
177c0ea7 3045
76b3903d
GV		 3046 As a compromise, so we can benefit from caching info for remote
3047 volumes, we use a simple expiry mechanism to invalidate cache
3048 entries that are more than ten seconds old. */
3049
3050#if 0
3051 /* No point doing this, because WNetGetConnection is even slower than
3052 GetVolumeInformation, consistently taking ~50ms on a 486 (FWIW,
3053 GetDriveType is about the only call of this type which does not
3054 involve network access, and so is extremely quick). */
3055
3056 /* Map drive letter to UNC if remote. */
ed3751c8 3057 if (isalpha (root_dir[0]) && !fixed[DRIVE_INDEX (root_dir[0])])
76b3903d
GV		 3058 {
3059 char remote_name[ 256 ];
3060 char drive[3] = { root_dir[0], ':' };
3061
3062 if (WNetGetConnection (drive, remote_name, sizeof (remote_name))
3063 == NO_ERROR)
3064 /* do something */ ;
3065 }
3066#endif
3067
3068 info = lookup_volume_info (root_dir);
3069
3070 if (info == NULL || ! VOLINFO_STILL_VALID (root_dir, info))
94eab1c8 3071 {
94eab1c8
JB		 3072 DWORD serialnum;
3073 DWORD maxcomp;
3074 DWORD flags;
94eab1c8
JB		 3075
3076 /* Info is not cached, or is stale. */
f5441ba4
EZ		 3077 if (w32_unicode_filenames)
3078 {
3079 wchar_t root_w[MAX_PATH];
3080 wchar_t name_w[MAX_PATH+1];
3081 wchar_t type_w[MAX_PATH+1];
3082
3083 filename_to_utf16 (root_dir, root_w);
3084 if (!GetVolumeInformationW (root_w,
3085 name_w, sizeof (name_w),
3086 &serialnum,
3087 &maxcomp,
3088 &flags,
3089 type_w, sizeof (type_w)))
3090 return NULL;
3091 /* Hmm... not really 100% correct, as these 2 are not file
3092 names... */
3093 filename_from_utf16 (name_w, name);
3094 filename_from_utf16 (type_w, type);
3095 }
3096 else
3097 {
3098 char root_a[MAX_PATH];
3099 char name_a[MAX_PATH+1];
3100 char type_a[MAX_PATH+1];
3101
3102 filename_to_ansi (root_dir, root_a);
3103 if (!GetVolumeInformationA (root_a,
3104 name_a, sizeof (name_a),
3105 &serialnum,
3106 &maxcomp,
3107 &flags,
3108 type_a, sizeof (type_a)))
3109 return NULL;
3110 filename_from_ansi (name_a, name);
3111 filename_from_ansi (type_a, type);
3112 }
76b3903d 3113
94eab1c8
JB		 3114 /* Cache the volume information for future use, overwriting existing
3115 entry if present. */
3116 if (info == NULL)
3117 {
23f86fce 3118 info = xmalloc (sizeof (volume_info_data));
94eab1c8
JB		 3119 add_volume_info (root_dir, info);
3120 }
3121 else
3122 {
3123 xfree (info->name);
3124 xfree (info->type);
3125 }
3126
3127 info->name = xstrdup (name);
f5441ba4 3128 unixtodos_filename (info->name);
94eab1c8
JB		 3129 info->serialnum = serialnum;
3130 info->maxcomp = maxcomp;
3131 info->flags = flags;
3132 info->type = xstrdup (type);
3133 info->timestamp = GetTickCount ();
3134 }
76b3903d
GV		 3135
3136 return info;
3137}
480b0c5b 3138
6dad7178
EZ		 3139/* Get information on the volume where NAME is held; set path pointer to
3140 start of pathname in NAME (past UNC header\volume header if present),
3141 if pPath is non-NULL.
3142
3143 Note: if NAME includes symlinks, the information is for the volume
3144 of the symlink, not of its target. That's because, even though
3145 GetVolumeInformation returns information about the symlink target
3146 of its argument, we only pass the root directory to
3147 GetVolumeInformation, not the full NAME. */
bedf4aab 3148static int
480b0c5b 3149get_volume_info (const char * name, const char ** pPath)
95ed0025 3150{
f5441ba4 3151 char temp[MAX_UTF8_PATH];
480b0c5b 3152 char *rootname = NULL; /* default to current volume */
76b3903d 3153 volume_info_data * info;
f5441ba4 3154 int root_len = parse_root (name, pPath);
480b0c5b
GV		 3155
3156 if (name == NULL)
3157 return FALSE;
3158
f5441ba4
EZ		 3159 /* Copy the root name of the volume, if given. */
3160 if (root_len)
95ed0025 3161 {
f5441ba4
EZ		 3162 strncpy (temp, name, root_len);
3163 temp[root_len] = '\0';
3164 unixtodos_filename (temp);
480b0c5b 3165 rootname = temp;
95ed0025 3166 }
480b0c5b 3167
76b3903d
GV		 3168 info = GetCachedVolumeInformation (rootname);
3169 if (info != NULL)
95ed0025 3170 {
76b3903d
GV		 3171 /* Set global referenced by other functions. */
3172 volume_info = *info;
480b0c5b 3173 return TRUE;
95ed0025 3174 }
480b0c5b
GV		 3175 return FALSE;
3176}
3177
3178/* Determine if volume is FAT format (ie. only supports short 8.3
6dad7178
EZ		 3179 names); also set path pointer to start of pathname in name, if
3180 pPath is non-NULL. */
bedf4aab 3181static int
480b0c5b
GV		 3182is_fat_volume (const char * name, const char ** pPath)
3183{
3184 if (get_volume_info (name, pPath))
3185 return (volume_info.maxcomp == 12);
3186 return FALSE;
3187}
3188
f5441ba4
EZ		 3189/* Convert all slashes in a filename to backslashes, and map filename
3190 to a valid 8.3 name if necessary. The result is a pointer to a
3191 static buffer, so CAVEAT EMPTOR! */
480b0c5b 3192const char *
fbd6baed 3193map_w32_filename (const char * name, const char ** pPath)
480b0c5b 3194{
f5441ba4 3195 static char shortname[MAX_UTF8_PATH];
480b0c5b
GV		 3196 char * str = shortname;
3197 char c;
480b0c5b 3198 char * path;
76b3903d 3199 const char * save_name = name;
480b0c5b 3200
f5441ba4 3201 if (strlen (name) >= sizeof (shortname))
ca149beb
AI		 3202 {
3203 /* Return a filename which will cause callers to fail. */
3204 strcpy (shortname, "?");
3205 return shortname;
3206 }
3207
a302c7ae 3208 if (is_fat_volume (name, (const char **)&path)) /* truncate to 8.3 */
95ed0025 3209 {
480b0c5b
GV		 3210 register int left = 8; /* maximum number of chars in part */
3211 register int extn = 0; /* extension added? */
3212 register int dots = 2; /* maximum number of dots allowed */
3213
3214 while (name < path)
3215 *str++ = *name++; /* skip past UNC header */
3216
3217 while ((c = *name++))
3218 {
3219 switch ( c )
3220 {
6dad7178 3221 case ':':
480b0c5b
GV		 3222 case '\\':
3223 case '/':
6dad7178 3224 *str++ = (c == ':' ? ':' : '\\');
480b0c5b
GV		 3225 extn = 0; /* reset extension flags */
3226 dots = 2; /* max 2 dots */
3227 left = 8; /* max length 8 for main part */
3228 break;
3229 case '.':
3230 if ( dots )
3231 {
3232 /* Convert path components of the form .xxx to _xxx,
3233 but leave . and .. as they are. This allows .emacs
3234 to be read as _emacs, for example. */
3235
3236 if (! *name ||
3237 *name == '.' ||
3238 IS_DIRECTORY_SEP (*name))
3239 {
3240 *str++ = '.';
3241 dots--;
3242 }
3243 else
3244 {
3245 *str++ = '_';
3246 left--;
3247 dots = 0;
3248 }
3249 }
3250 else if ( !extn )
3251 {
3252 *str++ = '.';
3253 extn = 1; /* we've got an extension */
3254 left = 3; /* 3 chars in extension */
3255 }
3256 else
3257 {
3258 /* any embedded dots after the first are converted to _ */
3259 *str++ = '_';
3260 }
3261 break;
3262 case '~':
3263 case '#': /* don't lose these, they're important */
3264 if ( ! left )
3265 str[-1] = c; /* replace last character of part */
3266 /* FALLTHRU */
3267 default:
f5441ba4 3268 if ( left && 'A' <= c && c <= 'Z' )
480b0c5b
GV		 3269 {
3270 *str++ = tolower (c); /* map to lower case (looks nicer) */
3271 left--;
3272 dots = 0; /* started a path component */
3273 }
3274 break;
3275 }
3276 }
3277 *str = '\0';
fc85cb29
RS		 3278 }
3279 else
3280 {
3281 strcpy (shortname, name);
3282 unixtodos_filename (shortname);
95ed0025 3283 }
480b0c5b
GV		 3284
3285 if (pPath)
76b3903d 3286 *pPath = shortname + (path - save_name);
480b0c5b 3287
fc85cb29 3288 return shortname;
480b0c5b
GV		 3289}
3290
b3308d2e
KH		 3291static int
3292is_exec (const char * name)
3293{
3294 char * p = strrchr (name, '.');
3295 return
3296 (p != NULL
05131107
JR		 3297 && (xstrcasecmp (p, ".exe") == 0 ||
3298 xstrcasecmp (p, ".com") == 0 ||
3299 xstrcasecmp (p, ".bat") == 0 ||
3300 xstrcasecmp (p, ".cmd") == 0));
b3308d2e
KH		 3301}
3302
0b9de7cd
EZ		 3303/* Emulate the Unix directory procedures opendir, closedir, and
3304 readdir. We rename them to sys_* names because some versions of
3305 MinGW startup code call opendir and readdir to glob wildcards, and
3306 the code that calls them doesn't grok UTF-8 encoded file names we
3307 produce in dirent->d_name[]. */
76b3903d 3308
95ef7787 3309struct dirent dir_static; /* simulated directory contents */
76b3903d
GV		 3310static HANDLE dir_find_handle = INVALID_HANDLE_VALUE;
3311static int dir_is_fat;
0b9de7cd
EZ		 3312static char dir_pathname[MAX_UTF8_PATH];
3313static WIN32_FIND_DATAW dir_find_data_w;
3314static WIN32_FIND_DATAA dir_find_data_a;
df87c56c
EZ		 3315#define DIR_FIND_DATA_W 1
3316#define DIR_FIND_DATA_A 2
3317static int last_dir_find_data = -1;
76b3903d 3318
9d3355d1
GV		 3319/* Support shares on a network resource as subdirectories of a read-only
3320 root directory. */
3321static HANDLE wnet_enum_handle = INVALID_HANDLE_VALUE;
bedf4aab 3322static HANDLE open_unc_volume (const char *);
0b9de7cd 3323static void *read_unc_volume (HANDLE, wchar_t *, char *, int);
bedf4aab 3324static void close_unc_volume (HANDLE);
9d3355d1 3325
76b3903d 3326DIR *
0b9de7cd 3327sys_opendir (const char *filename)
76b3903d
GV		 3328{
3329 DIR *dirp;
3330
3331 /* Opening is done by FindFirstFile. However, a read is inherent to
3332 this operation, so we defer the open until read time. */
3333
76b3903d
GV		 3334 if (dir_find_handle != INVALID_HANDLE_VALUE)
3335 return NULL;
9d3355d1
GV		 3336 if (wnet_enum_handle != INVALID_HANDLE_VALUE)
3337 return NULL;
3338
6dad7178
EZ		 3339 /* Note: We don't support traversal of UNC volumes via symlinks.
3340 Doing so would mean punishing 99.99% of use cases by resolving
3341 all the possible symlinks in FILENAME, recursively. */
9d3355d1
GV		 3342 if (is_unc_volume (filename))
3343 {
3344 wnet_enum_handle = open_unc_volume (filename);
3345 if (wnet_enum_handle == INVALID_HANDLE_VALUE)
3346 return NULL;
3347 }
3348
3349 if (!(dirp = (DIR *) malloc (sizeof (DIR))))
3350 return NULL;
76b3903d
GV		 3351
3352 dirp->dd_fd = 0;
3353 dirp->dd_loc = 0;
3354 dirp->dd_size = 0;
3355
0b9de7cd
EZ		 3356 strncpy (dir_pathname, map_w32_filename (filename, NULL), MAX_UTF8_PATH - 1);
3357 dir_pathname[MAX_UTF8_PATH - 1] = '\0';
6dad7178
EZ		 3358 /* Note: We don't support symlinks to file names on FAT volumes.
3359 Doing so would mean punishing 99.99% of use cases by resolving
3360 all the possible symlinks in FILENAME, recursively. */
76b3903d
GV		 3361 dir_is_fat = is_fat_volume (filename, NULL);
3362
3363 return dirp;
3364}
3365
3366void
0b9de7cd 3367sys_closedir (DIR *dirp)
76b3903d
GV		 3368{
3369 /* If we have a find-handle open, close it. */
3370 if (dir_find_handle != INVALID_HANDLE_VALUE)
3371 {
3372 FindClose (dir_find_handle);
3373 dir_find_handle = INVALID_HANDLE_VALUE;
3374 }
9d3355d1
GV		 3375 else if (wnet_enum_handle != INVALID_HANDLE_VALUE)
3376 {
3377 close_unc_volume (wnet_enum_handle);
3378 wnet_enum_handle = INVALID_HANDLE_VALUE;
3379 }
76b3903d
GV		 3380 xfree ((char *) dirp);
3381}
3382
95ef7787 3383struct dirent *
0b9de7cd 3384sys_readdir (DIR *dirp)
76b3903d 3385{
b07103dc
EZ		 3386 int downcase = !NILP (Vw32_downcase_file_names);
3387
9d3355d1
GV		 3388 if (wnet_enum_handle != INVALID_HANDLE_VALUE)
3389 {
177c0ea7 3390 if (!read_unc_volume (wnet_enum_handle,
0b9de7cd
EZ		 3391 dir_find_data_w.cFileName,
3392 dir_find_data_a.cFileName,
59eb0929 3393 MAX_PATH))
9d3355d1
GV		 3394 return NULL;
3395 }
76b3903d 3396 /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */
9d3355d1 3397 else if (dir_find_handle == INVALID_HANDLE_VALUE)
76b3903d 3398 {
0b9de7cd 3399 char filename[MAX_UTF8_PATH + 2];
76b3903d
GV		 3400 int ln;
3401
3402 strcpy (filename, dir_pathname);
3403 ln = strlen (filename) - 1;
0b9de7cd
EZ		 3404 if (!IS_DIRECTORY_SEP (filename[ln]))
3405 strcat (filename, "\\");
3406 strcat (filename, "*");
3407
3408 /* Note: No need to resolve symlinks in FILENAME, because
3409 FindFirst opens the directory that is the target of a
3410 symlink. */
3411 if (w32_unicode_filenames)
806fed21 3412 {
0b9de7cd
EZ		 3413 wchar_t fnw[MAX_PATH];
3414
3415 filename_to_utf16 (filename, fnw);
3416 dir_find_handle = FindFirstFileW (fnw, &dir_find_data_w);
806fed21
EZ		 3417 }
3418 else
3419 {
0b9de7cd 3420 char fna[MAX_PATH];
806fed21 3421
0b9de7cd 3422 filename_to_ansi (filename, fna);
df87c56c
EZ		 3423 /* If FILENAME is not representable by the current ANSI
3424 codepage, we don't want FindFirstFileA to interpret the
3425 '?' characters as a wildcard. */
3426 if (_mbspbrk (fna, "?"))
3427 dir_find_handle = INVALID_HANDLE_VALUE;
3428 else
3429 dir_find_handle = FindFirstFileA (fna, &dir_find_data_a);
806fed21 3430 }
76b3903d
GV		 3431
3432 if (dir_find_handle == INVALID_HANDLE_VALUE)
3433 return NULL;
3434 }
0b9de7cd
EZ		 3435 else if (w32_unicode_filenames)
3436 {
3437 if (!FindNextFileW (dir_find_handle, &dir_find_data_w))
3438 return NULL;
3439 }
76b3903d
GV		 3440 else
3441 {
0b9de7cd 3442 if (!FindNextFileA (dir_find_handle, &dir_find_data_a))
76b3903d
GV		 3443 return NULL;
3444 }
177c0ea7 3445
76b3903d
GV		 3446 /* Emacs never uses this value, so don't bother making it match
3447 value returned by stat(). */
3448 dir_static.d_ino = 1;
177c0ea7 3449
0b9de7cd 3450 if (w32_unicode_filenames)
b07103dc 3451 {
0b9de7cd
EZ		 3452 if (downcase || dir_is_fat)
3453 {
3454 wchar_t tem[MAX_PATH];
177c0ea7 3455
0b9de7cd
EZ		 3456 wcscpy (tem, dir_find_data_w.cFileName);
3457 CharLowerW (tem);
3458 filename_from_utf16 (tem, dir_static.d_name);
3459 }
3460 else
3461 filename_from_utf16 (dir_find_data_w.cFileName, dir_static.d_name);
df87c56c 3462 last_dir_find_data = DIR_FIND_DATA_W;
192788d7
EZ		 3463 }
3464 else
76b3903d 3465 {
0b9de7cd
EZ		 3466 char tem[MAX_PATH];
3467
3468 /* If the file name in cFileName[] includes `?' characters, it
3469 means the original file name used characters that cannot be
3470 represented by the current ANSI codepage. To avoid total
3471 lossage, retrieve the short 8+3 alias of the long file
3472 name. */
3473 if (_mbspbrk (dir_find_data_a.cFileName, "?"))
6d2851de 3474 {
0b9de7cd
EZ		 3475 strcpy (tem, dir_find_data_a.cAlternateFileName);
3476 /* 8+3 aliases are returned in all caps, which could break
3477 various alists that look at filenames' extensions. */
3478 downcase = 1;
3479 }
3480 else if (downcase || dir_is_fat)
3481 strcpy (tem, dir_find_data_a.cFileName);
3482 else
3483 filename_from_ansi (dir_find_data_a.cFileName, dir_static.d_name);
3484 if (downcase || dir_is_fat)
3485 {
3486 _mbslwr (tem);
3487 filename_from_ansi (tem, dir_static.d_name);
6d2851de 3488 }
df87c56c 3489 last_dir_find_data = DIR_FIND_DATA_A;
76b3903d 3490 }
177c0ea7 3491
0b9de7cd
EZ		 3492 dir_static.d_namlen = strlen (dir_static.d_name);
3493 dir_static.d_reclen = sizeof (struct dirent) - MAX_UTF8_PATH + 3 +
3494 dir_static.d_namlen - dir_static.d_namlen % 4;
3495
76b3903d
GV		 3496 return &dir_static;
3497}
3498
bedf4aab 3499static HANDLE
e0c181dd 3500open_unc_volume (const char *path)
9d3355d1 3501{
0b9de7cd
EZ		 3502 const char *fn = map_w32_filename (path, NULL);
3503 DWORD result;
9d3355d1 3504 HANDLE henum;
9d3355d1 3505
0b9de7cd
EZ		 3506 if (w32_unicode_filenames)
3507 {
3508 NETRESOURCEW nrw;
3509 wchar_t fnw[MAX_PATH];
3510
3511 nrw.dwScope = RESOURCE_GLOBALNET;
3512 nrw.dwType = RESOURCETYPE_DISK;
3513 nrw.dwDisplayType = RESOURCEDISPLAYTYPE_SERVER;
3514 nrw.dwUsage = RESOURCEUSAGE_CONTAINER;
3515 nrw.lpLocalName = NULL;
3516 filename_to_utf16 (fn, fnw);
3517 nrw.lpRemoteName = fnw;
3518 nrw.lpComment = NULL;
3519 nrw.lpProvider = NULL;
9d3355d1 3520
0b9de7cd
EZ		 3521 result = WNetOpenEnumW (RESOURCE_GLOBALNET, RESOURCETYPE_DISK,
3522 RESOURCEUSAGE_CONNECTABLE, &nrw, &henum);
3523 }
3524 else
3525 {
3526 NETRESOURCEA nra;
3527 char fna[MAX_PATH];
9d3355d1 3528
0b9de7cd
EZ		 3529 nra.dwScope = RESOURCE_GLOBALNET;
3530 nra.dwType = RESOURCETYPE_DISK;
3531 nra.dwDisplayType = RESOURCEDISPLAYTYPE_SERVER;
3532 nra.dwUsage = RESOURCEUSAGE_CONTAINER;
3533 nra.lpLocalName = NULL;
3534 filename_to_ansi (fn, fna);
3535 nra.lpRemoteName = fna;
3536 nra.lpComment = NULL;
3537 nra.lpProvider = NULL;
3538
3539 result = WNetOpenEnumA (RESOURCE_GLOBALNET, RESOURCETYPE_DISK,
3540 RESOURCEUSAGE_CONNECTABLE, &nra, &henum);
3541 }
9d3355d1
GV		 3542 if (result == NO_ERROR)
3543 return henum;
3544 else
3545 return INVALID_HANDLE_VALUE;
3546}
3547
0b9de7cd
EZ		 3548static void *
3549read_unc_volume (HANDLE henum, wchar_t *fname_w, char *fname_a, int size)
9d3355d1 3550{
a302c7ae 3551 DWORD count;
9d3355d1 3552 int result;
9d3355d1 3553 char *buffer;
0b9de7cd
EZ		 3554 DWORD bufsize = 512;
3555 void *retval;
9d3355d1
GV		 3556
3557 count = 1;
0b9de7cd
EZ		 3558 if (w32_unicode_filenames)
3559 {
3560 wchar_t *ptrw;
9d3355d1 3561
0b9de7cd
EZ		 3562 bufsize *= 2;
3563 buffer = alloca (bufsize);
3564 result = WNetEnumResourceW (henum, &count, buffer, &bufsize);
3565 if (result != NO_ERROR)
3566 return NULL;
3567 /* WNetEnumResource returns \\resource\share...skip forward to "share". */
3568 ptrw = ((LPNETRESOURCEW) buffer)->lpRemoteName;
3569 ptrw += 2;
3570 while (*ptrw && *ptrw != L'/' && *ptrw != L'\\') ptrw++;
3571 ptrw++;
3572 wcsncpy (fname_w, ptrw, size);
3573 retval = fname_w;
3574 }
806fed21
EZ		 3575 else
3576 {
0b9de7cd
EZ		 3577 int dbcs_p = max_filename_mbslen () > 1;
3578 char *ptra;
3579
3580 buffer = alloca (bufsize);
3581 result = WNetEnumResourceA (henum, &count, buffer, &bufsize);
3582 if (result != NO_ERROR)
3583 return NULL;
3584 ptra = ((LPNETRESOURCEA) buffer)->lpRemoteName;
3585 ptra += 2;
3586 if (!dbcs_p)
3587 while (*ptra && !IS_DIRECTORY_SEP (*ptra)) ptra++;
3588 else
3589 {
3590 while (*ptra && !IS_DIRECTORY_SEP (*ptra))
3591 ptra = CharNextExA (file_name_codepage, ptra, 0);
3592 }
3593 ptra++;
3594 strncpy (fname_a, ptra, size);
3595 retval = fname_a;
806fed21 3596 }
9d3355d1 3597
0b9de7cd 3598 return retval;
9d3355d1
GV		 3599}
3600
bedf4aab 3601static void
9d3355d1
GV		 3602close_unc_volume (HANDLE henum)
3603{
3604 if (henum != INVALID_HANDLE_VALUE)
3605 WNetCloseEnum (henum);
3606}
3607
bedf4aab 3608static DWORD
e0c181dd 3609unc_volume_file_attributes (const char *path)
9d3355d1
GV		 3610{
3611 HANDLE henum;
3612 DWORD attrs;
3613
3614 henum = open_unc_volume (path);
3615 if (henum == INVALID_HANDLE_VALUE)
3616 return -1;
3617
3618 attrs = FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_DIRECTORY;
3619
3620 close_unc_volume (henum);
3621
3622 return attrs;
3623}
3624
302d7d54
JR		 3625/* Ensure a network connection is authenticated. */
3626static void
3627logon_network_drive (const char *path)
3628{
0b9de7cd 3629 char share[MAX_UTF8_PATH];
806fed21 3630 int n_slashes;
40a339c8 3631 char drive[4];
be4c6380 3632 UINT drvtype;
806fed21 3633 char *p;
0b9de7cd 3634 DWORD val;
40a339c8 3635
be4c6380
EZ		 3636 if (IS_DIRECTORY_SEP (path[0]) && IS_DIRECTORY_SEP (path[1]))
3637 drvtype = DRIVE_REMOTE;
3638 else if (path[0] == '\0' || path[1] != ':')
3639 drvtype = GetDriveType (NULL);
3640 else
3641 {
3642 drive[0] = path[0];
3643 drive[1] = ':';
3644 drive[2] = '\\';
3645 drive[3] = '\0';
3646 drvtype = GetDriveType (drive);
3647 }
302d7d54
JR		 3648
3649 /* Only logon to networked drives. */
be4c6380 3650 if (drvtype != DRIVE_REMOTE)
302d7d54 3651 return;
40a339c8 3652
302d7d54 3653 n_slashes = 2;
0b9de7cd 3654 strncpy (share, path, MAX_UTF8_PATH);
302d7d54 3655 /* Truncate to just server and share name. */
0b9de7cd 3656 for (p = share + 2; *p && p < share + MAX_UTF8_PATH; p++)
302d7d54 3657 {
806fed21 3658 if (IS_DIRECTORY_SEP (*p) && ++n_slashes > 3)
302d7d54 3659 {
806fed21 3660 *p = '\0';
302d7d54
JR		 3661 break;
3662 }
3663 }
3664
0b9de7cd
EZ		 3665 if (w32_unicode_filenames)
3666 {
3667 NETRESOURCEW resourcew;
3668 wchar_t share_w[MAX_PATH];
3669
3670 resourcew.dwScope = RESOURCE_GLOBALNET;
3671 resourcew.dwType = RESOURCETYPE_DISK;
3672 resourcew.dwDisplayType = RESOURCEDISPLAYTYPE_SHARE;
3673 resourcew.dwUsage = RESOURCEUSAGE_CONTAINER;
3674 resourcew.lpLocalName = NULL;
3675 filename_to_utf16 (share, share_w);
3676 resourcew.lpRemoteName = share_w;
3677 resourcew.lpProvider = NULL;
3678
3679 val = WNetAddConnection2W (&resourcew, NULL, NULL, CONNECT_INTERACTIVE);
3680 }
3681 else
3682 {
3683 NETRESOURCEA resourcea;
3684 char share_a[MAX_PATH];
3685
3686 resourcea.dwScope = RESOURCE_GLOBALNET;
3687 resourcea.dwType = RESOURCETYPE_DISK;
3688 resourcea.dwDisplayType = RESOURCEDISPLAYTYPE_SHARE;
3689 resourcea.dwUsage = RESOURCEUSAGE_CONTAINER;
3690 resourcea.lpLocalName = NULL;
3691 filename_to_ansi (share, share_a);
3692 resourcea.lpRemoteName = share_a;
3693 resourcea.lpProvider = NULL;
302d7d54 3694
0b9de7cd
EZ		 3695 val = WNetAddConnection2A (&resourcea, NULL, NULL, CONNECT_INTERACTIVE);
3696 }
3697
3698 switch (val)
3699 {
3700 case NO_ERROR:
3701 case ERROR_ALREADY_ASSIGNED:
3702 break;
3703 case ERROR_ACCESS_DENIED:
3704 case ERROR_LOGON_FAILURE:
3705 errno = EACCES;
3706 break;
3707 case ERROR_BUSY:
3708 errno = EAGAIN;
3709 break;
3710 case ERROR_BAD_NET_NAME:
3711 case ERROR_NO_NET_OR_BAD_PATH:
3712 case ERROR_NO_NETWORK:
3713 case ERROR_CANCELLED:
3714 default:
3715 errno = ENOENT;
3716 break;
3717 }
302d7d54 3718}
480b0c5b 3719
14f20728 3720/* Emulate faccessat(2). */
480b0c5b 3721int
14f20728 3722faccessat (int dirfd, const char * path, int mode, int flags)
480b0c5b 3723{
b3308d2e
KH		 3724 DWORD attributes;
3725
14f20728
EZ		 3726 if (dirfd != AT_FDCWD
3727 && !(IS_DIRECTORY_SEP (path[0])
3728 || IS_DEVICE_SEP (path[1])))
73dcdb9f
PE		 3729 {
3730 errno = EBADF;
3731 return -1;
3732 }
3733
8d38f461
EZ		 3734 /* MSVCRT implementation of 'access' doesn't recognize D_OK, and its
3735 newer versions blow up when passed D_OK. */
b3308d2e 3736 path = map_w32_filename (path, NULL);
6dad7178
EZ		 3737 /* If the last element of PATH is a symlink, we need to resolve it
3738 to get the attributes of its target file. Note: any symlinks in
3739 PATH elements other than the last one are transparently resolved
3740 by GetFileAttributes below. */
14f20728
EZ		 3741 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0
3742 && (flags & AT_SYMLINK_NOFOLLOW) == 0)
6dad7178
EZ		 3743 path = chase_symlinks (path);
3744
e75e4a89
EZ		 3745 if (w32_unicode_filenames)
3746 {
3747 wchar_t path_w[MAX_PATH];
3748
3749 filename_to_utf16 (path, path_w);
3750 attributes = GetFileAttributesW (path_w);
3751 }
3752 else
3753 {
3754 char path_a[MAX_PATH];
3755
3756 filename_to_ansi (path, path_a);
3757 attributes = GetFileAttributesA (path_a);
3758 }
3759
3760 if (attributes == -1)
b3308d2e 3761 {
8d38f461
EZ		 3762 DWORD w32err = GetLastError ();
3763
3764 switch (w32err)
3765 {
6dad7178
EZ		 3766 case ERROR_INVALID_NAME:
3767 case ERROR_BAD_PATHNAME:
3768 if (is_unc_volume (path))
3769 {
3770 attributes = unc_volume_file_attributes (path);
3771 if (attributes == -1)
3772 {
3773 errno = EACCES;
3774 return -1;
3775 }
3776 break;
3777 }
3778 /* FALLTHROUGH */
8d38f461 3779 case ERROR_FILE_NOT_FOUND:
6dad7178 3780 case ERROR_BAD_NETPATH:
8d38f461
EZ		 3781 errno = ENOENT;
3782 break;
3783 default:
3784 errno = EACCES;
3785 break;
3786 }
b3308d2e
KH		 3787 return -1;
3788 }
6ad30855
EZ		 3789 if ((mode & X_OK) != 0
3790 && !(is_exec (path) || (attributes & FILE_ATTRIBUTE_DIRECTORY) != 0))
b3308d2e
KH		 3791 {
3792 errno = EACCES;
3793 return -1;
3794 }
3795 if ((mode & W_OK) != 0 && (attributes & FILE_ATTRIBUTE_READONLY) != 0)
3796 {
3797 errno = EACCES;
3798 return -1;
3799 }
3800 if ((mode & D_OK) != 0 && (attributes & FILE_ATTRIBUTE_DIRECTORY) == 0)
3801 {
3802 errno = EACCES;
3803 return -1;
3804 }
3805 return 0;
480b0c5b
GV		 3806}
3807
b1846422
EZ		 3808/* A version of 'access' to be used locally with file names in
3809 locale-specific encoding. Does not resolve symlinks and does not
3810 support file names on FAT12 and FAT16 volumes, but that's OK, since
3811 we only invoke this function for files inside the Emacs source or
3812 installation tree, on directories (so any symlinks should have the
3813 directory bit set), and on short file names such as "C:/.emacs". */
3814static int
3815sys_access (const char *fname, int mode)
3816{
3817 char fname_copy[MAX_PATH], *p;
3818 DWORD attributes;
3819
3820 strcpy (fname_copy, fname);
3821 /* Do the equivalent of unixtodos_filename. */
3822 for (p = fname_copy; *p; p = CharNext (p))
3823 if (*p == '/')
3824 *p = '\\';
3825
3826 if ((attributes = GetFileAttributesA (fname_copy)) == -1)
3827 {
3828 DWORD w32err = GetLastError ();
3829
3830 switch (w32err)
3831 {
3832 case ERROR_INVALID_NAME:
3833 case ERROR_BAD_PATHNAME:
3834 case ERROR_FILE_NOT_FOUND:
3835 case ERROR_BAD_NETPATH:
3836 errno = ENOENT;
3837 break;
3838 default:
3839 errno = EACCES;
3840 break;
3841 }
3842 return -1;
3843 }
3844 if ((mode & X_OK) != 0
3845 && !(is_exec (fname_copy)
3846 || (attributes & FILE_ATTRIBUTE_DIRECTORY) != 0))
3847 {
3848 errno = EACCES;
3849 return -1;
3850 }
3851 if ((mode & W_OK) != 0 && (attributes & FILE_ATTRIBUTE_READONLY) != 0)
3852 {
3853 errno = EACCES;
3854 return -1;
3855 }
3856 if ((mode & D_OK) != 0 && (attributes & FILE_ATTRIBUTE_DIRECTORY) == 0)
3857 {
3858 errno = EACCES;
3859 return -1;
3860 }
3861 return 0;
3862}
3863
14f20728
EZ		 3864/* Shadow some MSVC runtime functions to map requests for long filenames
3865 to reasonable short names if necessary. This was originally added to
3866 permit running Emacs on NT 3.1 on a FAT partition, which doesn't support
3867 long file names. */
3868
480b0c5b
GV		 3869int
3870sys_chdir (const char * path)
3871{
e75e4a89 3872 path = map_w32_filename (path, NULL);
03d58cca
EZ		 3873 if (w32_unicode_filenames)
3874 {
e75e4a89 3875 wchar_t newdir_w[MAX_PATH];
03d58cca 3876
e75e4a89
EZ		 3877 if (filename_to_utf16 (path, newdir_w) == 0)
3878 return _wchdir (newdir_w);
03d58cca
EZ		 3879 return -1;
3880 }
3881 else
3882 {
e75e4a89 3883 char newdir_a[MAX_PATH];
03d58cca 3884
e75e4a89
EZ		 3885 if (filename_to_ansi (path, newdir_a) == 0)
3886 return _chdir (newdir_a);
03d58cca
EZ		 3887 return -1;
3888 }
480b0c5b
GV		 3889}
3890
3891int
3892sys_chmod (const char * path, int mode)
3893{
6dad7178 3894 path = chase_symlinks (map_w32_filename (path, NULL));
e75e4a89
EZ		 3895 if (w32_unicode_filenames)
3896 {
3897 wchar_t path_w[MAX_PATH];
3898
3899 filename_to_utf16 (path, path_w);
3900 return _wchmod (path_w, mode);
3901 }
3902 else
3903 {
3904 char path_a[MAX_PATH];
3905
3906 filename_to_ansi (path, path_a);
3907 return _chmod (path_a, mode);
3908 }
480b0c5b
GV		 3909}
3910
3911int
3912sys_creat (const char * path, int mode)
3913{
e75e4a89
EZ		 3914 path = map_w32_filename (path, NULL);
3915 if (w32_unicode_filenames)
3916 {
3917 wchar_t path_w[MAX_PATH];
3918
3919 filename_to_utf16 (path, path_w);
3920 return _wcreat (path_w, mode);
3921 }
3922 else
3923 {
3924 char path_a[MAX_PATH];
3925
3926 filename_to_ansi (path, path_a);
3927 return _creat (path_a, mode);
3928 }
480b0c5b
GV		 3929}
3930
3931FILE *
b56ceb92 3932sys_fopen (const char * path, const char * mode)
480b0c5b
GV		 3933{
3934 int fd;
3935 int oflag;
3936 const char * mode_save = mode;
3937
3938 /* Force all file handles to be non-inheritable. This is necessary to
3939 ensure child processes don't unwittingly inherit handles that might
3940 prevent future file access. */
3941
3942 if (mode[0] == 'r')
3943 oflag = O_RDONLY;
3944 else if (mode[0] == 'w' || mode[0] == 'a')
3945 oflag = O_WRONLY | O_CREAT | O_TRUNC;
95ed0025 3946 else
480b0c5b
GV		 3947 return NULL;
3948
3949 /* Only do simplistic option parsing. */
3950 while (*++mode)
3951 if (mode[0] == '+')
3952 {
3953 oflag &= ~(O_RDONLY | O_WRONLY);
3954 oflag |= O_RDWR;
3955 }
3956 else if (mode[0] == 'b')
3957 {
3958 oflag &= ~O_TEXT;
3959 oflag |= O_BINARY;
3960 }
3961 else if (mode[0] == 't')
3962 {
3963 oflag &= ~O_BINARY;
3964 oflag |= O_TEXT;
3965 }
3966 else break;
3967
e75e4a89
EZ		 3968 path = map_w32_filename (path, NULL);
3969 if (w32_unicode_filenames)
3970 {
3971 wchar_t path_w[MAX_PATH];
3972
3973 filename_to_utf16 (path, path_w);
3974 fd = _wopen (path_w, oflag | _O_NOINHERIT, 0644);
3975 }
3976 else
3977 {
3978 char path_a[MAX_PATH];
3979
3980 filename_to_ansi (path, path_a);
3981 fd = _open (path_a, oflag | _O_NOINHERIT, 0644);
3982 }
480b0c5b
GV		 3983 if (fd < 0)
3984 return NULL;
3985
76b3903d 3986 return _fdopen (fd, mode_save);
95ed0025 3987}
480b0c5b 3988
76b3903d 3989/* This only works on NTFS volumes, but is useful to have. */
480b0c5b 3990int
76b3903d 3991sys_link (const char * old, const char * new)
480b0c5b 3992{
76b3903d
GV		 3993 HANDLE fileh;
3994 int result = -1;
6349f70a
EZ		 3995 char oldname[MAX_UTF8_PATH], newname[MAX_UTF8_PATH];
3996 wchar_t oldname_w[MAX_PATH];
3997 char oldname_a[MAX_PATH];
76b3903d
GV		 3998
3999 if (old == NULL || new == NULL)
4000 {
4001 errno = ENOENT;
4002 return -1;
4003 }
4004
4005 strcpy (oldname, map_w32_filename (old, NULL));
4006 strcpy (newname, map_w32_filename (new, NULL));
4007
6349f70a
EZ		 4008 if (w32_unicode_filenames)
4009 {
4010 filename_to_utf16 (oldname, oldname_w);
4011 fileh = CreateFileW (oldname_w, 0, 0, NULL, OPEN_EXISTING,
4012 FILE_FLAG_BACKUP_SEMANTICS, NULL);
4013 }
4014 else
4015 {
4016 filename_to_ansi (oldname, oldname_a);
4017 fileh = CreateFileA (oldname_a, 0, 0, NULL, OPEN_EXISTING,
4018 FILE_FLAG_BACKUP_SEMANTICS, NULL);
4019 }
76b3903d
GV		 4020 if (fileh != INVALID_HANDLE_VALUE)
4021 {
4022 int wlen;
4023
4024 /* Confusingly, the "alternate" stream name field does not apply
4025 when restoring a hard link, and instead contains the actual
4026 stream data for the link (ie. the name of the link to create).
4027 The WIN32_STREAM_ID structure before the cStreamName field is
4028 the stream header, which is then immediately followed by the
4029 stream data. */
4030
4031 struct {
4032 WIN32_STREAM_ID wid;
4033 WCHAR wbuffer[MAX_PATH]; /* extra space for link name */
4034 } data;
4035
6349f70a
EZ		 4036 /* We used to pass MB_PRECOMPOSED as the 2nd arg here, but MSDN
4037 indicates that flag is unsupported for CP_UTF8, and OTOH says
4038 it is the default anyway. */
829f4f22
EZ		 4039 wlen = pMultiByteToWideChar (CP_UTF8, 0, newname, -1,
4040 data.wid.cStreamName, MAX_PATH);
76b3903d
GV		 4041 if (wlen > 0)
4042 {
4043 LPVOID context = NULL;
4044 DWORD wbytes = 0;
4045
4046 data.wid.dwStreamId = BACKUP_LINK;
4047 data.wid.dwStreamAttributes = 0;
ed3751c8 4048 data.wid.Size.LowPart = wlen * sizeof (WCHAR);
76b3903d
GV		 4049 data.wid.Size.HighPart = 0;
4050 data.wid.dwStreamNameSize = 0;
4051
4052 if (BackupWrite (fileh, (LPBYTE)&data,
4053 offsetof (WIN32_STREAM_ID, cStreamName)
4054 + data.wid.Size.LowPart,
4055 &wbytes, FALSE, FALSE, &context)
4056 && BackupWrite (fileh, NULL, 0, &wbytes, TRUE, FALSE, &context))
4057 {
4058 /* succeeded */
4059 result = 0;
4060 }
4061 else
4062 {
6349f70a
EZ		 4063 DWORD err = GetLastError ();
4064 DWORD attributes;
4065
4066 switch (err)
4067 {
4068 case ERROR_ACCESS_DENIED:
4069 /* This is what happens when OLDNAME is a directory,
4070 since Windows doesn't support hard links to
4071 directories. Posix says to set errno to EPERM in
4072 that case. */
4073 if (w32_unicode_filenames)
4074 attributes = GetFileAttributesW (oldname_w);
4075 else
4076 attributes = GetFileAttributesA (oldname_a);
4077 if (attributes != -1
4078 && (attributes & FILE_ATTRIBUTE_DIRECTORY) != 0)
4079 errno = EPERM;
4080 else if (attributes == -1
4081 && is_unc_volume (oldname)
4082 && unc_volume_file_attributes (oldname) != -1)
4083 errno = EPERM;
4084 else
4085 errno = EACCES;
4086 break;
4087 case ERROR_TOO_MANY_LINKS:
4088 errno = EMLINK;
4089 break;
4090 case ERROR_NOT_SAME_DEVICE:
4091 errno = EXDEV;
4092 break;
4093 default:
4094 errno = EINVAL;
4095 break;
4096 }
76b3903d
GV		 4097 }
4098 }
4099
4100 CloseHandle (fileh);
4101 }
4102 else
4103 errno = ENOENT;
4104
4105 return result;
480b0c5b
GV		 4106}
4107
4108int
4109sys_mkdir (const char * path)
4110{
44b32251
EZ		 4111 path = map_w32_filename (path, NULL);
4112
4113 if (w32_unicode_filenames)
4114 {
4115 wchar_t path_w[MAX_PATH];
4116
4117 filename_to_utf16 (path, path_w);
4118 return _wmkdir (path_w);
4119 }
4120 else
4121 {
4122 char path_a[MAX_PATH];
4123
4124 filename_to_ansi (path, path_a);
4125 return _mkdir (path_a);
4126 }
480b0c5b
GV		 4127}
4128
63f5c6c2
EZ		 4129int
4130sys_open (const char * path, int oflag, int mode)
4131{
4132 const char* mpath = map_w32_filename (path, NULL);
4133 int res = -1;
4134
44b32251
EZ		 4135 if (w32_unicode_filenames)
4136 {
4137 wchar_t mpath_w[MAX_PATH];
4138
4139 filename_to_utf16 (mpath, mpath_w);
4140 /* If possible, try to open file without _O_CREAT, to be able to
4141 write to existing hidden and system files. Force all file
4142 handles to be non-inheritable. */
4143 if ((oflag & (_O_CREAT | _O_EXCL)) != (_O_CREAT | _O_EXCL))
4144 res = _wopen (mpath_w, (oflag & ~_O_CREAT) | _O_NOINHERIT, mode);
4145 if (res < 0)
4146 res = _wopen (mpath_w, oflag | _O_NOINHERIT, mode);
4147 }
4148 else
4149 {
4150 char mpath_a[MAX_PATH];
4151
4152 filename_to_ansi (mpath, mpath_a);
4153 if ((oflag & (_O_CREAT | _O_EXCL)) != (_O_CREAT | _O_EXCL))
4154 res = _open (mpath_a, (oflag & ~_O_CREAT) | _O_NOINHERIT, mode);
4155 if (res < 0)
4156 res = _open (mpath_a, oflag | _O_NOINHERIT, mode);
4157 }
63f5c6c2
EZ		 4158
4159 return res;
4160}
4161
4162/* Implementation of mkostemp for MS-Windows, to avoid race conditions
4163 when using mktemp.
4164
4165 Standard algorithm for generating a temporary file name seems to be
4166 use pid or tid with a letter on the front (in place of the 6 X's)
4167 and cycle through the letters to find a unique name. We extend
4168 that to allow any reasonable character as the first of the 6 X's,
4169 so that the number of simultaneously used temporary files will be
4170 greater. */
4171
4172int
4173mkostemp (char * template, int flags)
480b0c5b 4174{
9d1778b1 4175 char * p;
63f5c6c2 4176 int i, fd = -1;
9d1778b1 4177 unsigned uid = GetCurrentThreadId ();
63f5c6c2 4178 int save_errno = errno;
9d1778b1
RS		 4179 static char first_char[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#";
4180
63f5c6c2 4181 errno = EINVAL;
9d1778b1 4182 if (template == NULL)
63f5c6c2
EZ		 4183 return -1;
4184
9d1778b1
RS		 4185 p = template + strlen (template);
4186 i = 5;
4187 /* replace up to the last 5 X's with uid in decimal */
4188 while (--p >= template && p[0] == 'X' && --i >= 0)
4189 {
4190 p[0] = '0' + uid % 10;
4191 uid /= 10;
4192 }
4193
4194 if (i < 0 && p[0] == 'X')
4195 {
4196 i = 0;
4197 do
4198 {
9d1778b1 4199 p[0] = first_char[i];
63f5c6c2
EZ		 4200 if ((fd = sys_open (template,
4201 flags | _O_CREAT | _O_EXCL | _O_RDWR,
4202 S_IRUSR | S_IWUSR)) >= 0
4203 || errno != EEXIST)
9d1778b1 4204 {
63f5c6c2
EZ		 4205 if (fd >= 0)
4206 errno = save_errno;
4207 return fd;
9d1778b1
RS		 4208 }
4209 }
4210 while (++i < sizeof (first_char));
4211 }
4212
63f5c6c2
EZ		 4213 /* Template is badly formed or else we can't generate a unique name. */
4214 return -1;
480b0c5b
GV		 4215}
4216
4217int
70743157
PE		 4218fchmod (int fd, mode_t mode)
4219{
4220 return 0;
4221}
4222
4223int
4224sys_rename_replace (const char *oldname, const char *newname, BOOL force)
480b0c5b 4225{
cfb5e855 4226 BOOL result;
f5c287f4 4227 char temp[MAX_UTF8_PATH], temp_a[MAX_PATH];;
069d2b50
L		 4228 int newname_dev;
4229 int oldname_dev;
f5c287f4 4230 bool have_temp_a = false;
480b0c5b 4231
e9e23e23 4232 /* MoveFile on Windows 95 doesn't correctly change the short file name
5162ffce
MB		 4233 alias in a number of circumstances (it is not easy to predict when
4234 just by looking at oldname and newname, unfortunately). In these
4235 cases, renaming through a temporary name avoids the problem.
4236
e9e23e23 4237 A second problem on Windows 95 is that renaming through a temp name when
5162ffce
MB		 4238 newname is uppercase fails (the final long name ends up in
4239 lowercase, although the short alias might be uppercase) UNLESS the
4240 long temp name is not 8.3.
4241
e9e23e23 4242 So, on Windows 95 we always rename through a temp name, and we make sure
5162ffce 4243 the temp name has a long extension to ensure correct renaming. */
480b0c5b 4244
fbd6baed 4245 strcpy (temp, map_w32_filename (oldname, NULL));
480b0c5b 4246
069d2b50
L		 4247 /* volume_info is set indirectly by map_w32_filename. */
4248 oldname_dev = volume_info.serialnum;
4249
417a7a0e 4250 if (os_subtype == OS_9X)
480b0c5b 4251 {
b3308d2e 4252 char * o;
480b0c5b 4253 char * p;
b3308d2e 4254 int i = 0;
f5c287f4 4255 char oldname_a[MAX_PATH];
b3308d2e
KH		 4256
4257 oldname = map_w32_filename (oldname, NULL);
f5c287f4
EZ		 4258 filename_to_ansi (oldname, oldname_a);
4259 filename_to_ansi (temp, temp_a);
4260 if ((o = strrchr (oldname_a, '\\')))
b3308d2e
KH		 4261 o++;
4262 else
f5c287f4 4263 o = (char *) oldname_a;
480b0c5b 4264
f5c287f4 4265 if ((p = strrchr (temp_a, '\\')))
480b0c5b
GV		 4266 p++;
4267 else
f5c287f4 4268 p = temp_a;
b3308d2e
KH		 4269
4270 do
4271 {
4272 /* Force temp name to require a manufactured 8.3 alias - this
4273 seems to make the second rename work properly. */
f313ee82 4274 sprintf (p, "_.%s.%u", o, i);
b3308d2e 4275 i++;
f5c287f4 4276 result = rename (oldname_a, temp_a);
b3308d2e
KH		 4277 }
4278 /* This loop must surely terminate! */
cfb5e855 4279 while (result < 0 && errno == EEXIST);
58f0cb7e 4280 if (result < 0)
480b0c5b 4281 return -1;
f5c287f4 4282 have_temp_a = true;
480b0c5b
GV		 4283 }
4284
70743157 4285 /* If FORCE, emulate Unix behavior - newname is deleted if it already exists
5162ffce 4286 (at least if it is a file; don't do this for directories).
76b3903d 4287
b3308d2e
KH		 4288 Since we mustn't do this if we are just changing the case of the
4289 file name (we would end up deleting the file we are trying to
4290 rename!), we let rename detect if the destination file already
4291 exists - that way we avoid the possible pitfalls of trying to
4292 determine ourselves whether two names really refer to the same
4293 file, which is not always possible in the general case. (Consider
4294 all the permutations of shared or subst'd drives, etc.) */
4295
4296 newname = map_w32_filename (newname, NULL);
069d2b50
L		 4297
4298 /* volume_info is set indirectly by map_w32_filename. */
4299 newname_dev = volume_info.serialnum;
4300
f5c287f4 4301 if (w32_unicode_filenames)
069d2b50 4302 {
f5c287f4 4303 wchar_t temp_w[MAX_PATH], newname_w[MAX_PATH];
069d2b50 4304
f5c287f4
EZ		 4305 filename_to_utf16 (temp, temp_w);
4306 filename_to_utf16 (newname, newname_w);
4307 result = _wrename (temp_w, newname_w);
4308 if (result < 0 && force)
069d2b50 4309 {
f5c287f4
EZ		 4310 DWORD w32err = GetLastError ();
4311
4312 if (errno == EACCES
4313 && newname_dev != oldname_dev)
4314 {
4315 /* The implementation of `rename' on Windows does not return
4316 errno = EXDEV when you are moving a directory to a
4317 different storage device (ex. logical disk). It returns
4318 EACCES instead. So here we handle such situations and
4319 return EXDEV. */
4320 DWORD attributes;
4321
4322 if ((attributes = GetFileAttributesW (temp_w)) != -1
4323 && (attributes & FILE_ATTRIBUTE_DIRECTORY))
4324 errno = EXDEV;
4325 }
4326 else if (errno == EEXIST)
4327 {
4328 if (_wchmod (newname_w, 0666) != 0)
4329 return result;
4330 if (_wunlink (newname_w) != 0)
4331 return result;
4332 result = _wrename (temp_w, newname_w);
4333 }
4334 else if (w32err == ERROR_PRIVILEGE_NOT_HELD
4335 && is_symlink (temp))
4336 {
4337 /* This is Windows prohibiting the user from creating a
4338 symlink in another place, since that requires
4339 privileges. */
4340 errno = EPERM;
4341 }
069d2b50 4342 }
f5c287f4
EZ		 4343 }
4344 else
4345 {
4346 char newname_a[MAX_PATH];
4347
4348 if (!have_temp_a)
4349 filename_to_ansi (temp, temp_a);
4350 filename_to_ansi (newname, newname_a);
4351 result = rename (temp_a, newname_a);
4352 if (result < 0 && force)
6dad7178 4353 {
f5c287f4
EZ		 4354 DWORD w32err = GetLastError ();
4355
4356 if (errno == EACCES
4357 && newname_dev != oldname_dev)
4358 {
4359 DWORD attributes;
4360
4361 if ((attributes = GetFileAttributesA (temp_a)) != -1
4362 && (attributes & FILE_ATTRIBUTE_DIRECTORY))
4363 errno = EXDEV;
4364 }
4365 else if (errno == EEXIST)
4366 {
4367 if (_chmod (newname_a, 0666) != 0)
4368 return result;
4369 if (_unlink (newname_a) != 0)
4370 return result;
4371 result = rename (temp_a, newname_a);
4372 }
4373 else if (w32err == ERROR_PRIVILEGE_NOT_HELD
4374 && is_symlink (temp))
4375 errno = EPERM;
6dad7178 4376 }
069d2b50 4377 }
480b0c5b 4378
eb9ea53f 4379 return result;
480b0c5b
GV		 4380}
4381
70743157
PE		 4382int
4383sys_rename (char const *old, char const *new)
4384{
4385 return sys_rename_replace (old, new, TRUE);
4386}
4387
480b0c5b
GV		 4388int
4389sys_rmdir (const char * path)
4390{
8dc689ce
EZ		 4391 path = map_w32_filename (path, NULL);
4392
4393 if (w32_unicode_filenames)
4394 {
4395 wchar_t path_w[MAX_PATH];
4396
4397 filename_to_utf16 (path, path_w);
4398 return _wrmdir (path_w);
4399 }
4400 else
4401 {
4402 char path_a[MAX_PATH];
4403
4404 filename_to_ansi (path, path_a);
4405 return _rmdir (path_a);
4406 }
480b0c5b
GV		 4407}
4408
4409int
4410sys_unlink (const char * path)
4411{
16bb7578
GV		 4412 path = map_w32_filename (path, NULL);
4413
8dc689ce
EZ		 4414 if (w32_unicode_filenames)
4415 {
4416 wchar_t path_w[MAX_PATH];
4417
4418 filename_to_utf16 (path, path_w);
4419 /* On Unix, unlink works without write permission. */
4420 _wchmod (path_w, 0666);
4421 return _wunlink (path_w);
4422 }
4423 else
4424 {
4425 char path_a[MAX_PATH];
4426
4427 filename_to_ansi (path, path_a);
4428 _chmod (path_a, 0666);
4429 return _unlink (path_a);
4430 }
480b0c5b
GV		 4431}
4432
4433static FILETIME utc_base_ft;
5da9424d 4434static ULONGLONG utc_base; /* In 100ns units */
480b0c5b
GV		 4435static int init = 0;
4436
5da9424d
JB		 4437#define FILETIME_TO_U64(result, ft) \
4438 do { \
4439 ULARGE_INTEGER uiTemp; \
4440 uiTemp.LowPart = (ft).dwLowDateTime; \
4441 uiTemp.HighPart = (ft).dwHighDateTime; \
4442 result = uiTemp.QuadPart; \
4443 } while (0)
4444
4445static void
b56ceb92 4446initialize_utc_base (void)
7c80d5ec 4447{
5da9424d
JB		 4448 /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */
4449 SYSTEMTIME st;
4450
4451 st.wYear = 1970;
4452 st.wMonth = 1;
4453 st.wDay = 1;
4454 st.wHour = 0;
4455 st.wMinute = 0;
4456 st.wSecond = 0;
4457 st.wMilliseconds = 0;
4458
4459 SystemTimeToFileTime (&st, &utc_base_ft);
4460 FILETIME_TO_U64 (utc_base, utc_base_ft);
7c80d5ec
EZ		 4461}
4462
480b0c5b
GV		 4463static time_t
4464convert_time (FILETIME ft)
4465{
5da9424d 4466 ULONGLONG tmp;
480b0c5b
GV		 4467
4468 if (!init)
4469 {
9d4f32e8 4470 initialize_utc_base ();
480b0c5b
GV		 4471 init = 1;
4472 }
4473
4474 if (CompareFileTime (&ft, &utc_base_ft) < 0)
4475 return 0;
4476
5da9424d
JB		 4477 FILETIME_TO_U64 (tmp, ft);
4478 return (time_t) ((tmp - utc_base) / 10000000L);
480b0c5b
GV		 4479}
4480
bedf4aab 4481static void
480b0c5b
GV		 4482convert_from_time_t (time_t time, FILETIME * pft)
4483{
5da9424d 4484 ULARGE_INTEGER tmp;
480b0c5b
GV		 4485
4486 if (!init)
4487 {
5da9424d 4488 initialize_utc_base ();
480b0c5b
GV		 4489 init = 1;
4490 }
4491
4492 /* time in 100ns units since 1-Jan-1601 */
5da9424d
JB		 4493 tmp.QuadPart = (ULONGLONG) time * 10000000L + utc_base;
4494 pft->dwHighDateTime = tmp.HighPart;
4495 pft->dwLowDateTime = tmp.LowPart;
480b0c5b 4496}
480b0c5b 4497
8aaaec6b 4498static PSECURITY_DESCRIPTOR
6dad7178
EZ		 4499get_file_security_desc_by_handle (HANDLE h)
4500{
4501 PSECURITY_DESCRIPTOR psd = NULL;
4502 DWORD err;
4503 SECURITY_INFORMATION si = OWNER_SECURITY_INFORMATION
4504 | GROUP_SECURITY_INFORMATION /* | DACL_SECURITY_INFORMATION */ ;
4505
4506 err = get_security_info (h, SE_FILE_OBJECT, si,
4507 NULL, NULL, NULL, NULL, &psd);
4508 if (err != ERROR_SUCCESS)
4509 return NULL;
4510
4511 return psd;
4512}
4513
4514static PSECURITY_DESCRIPTOR
4515get_file_security_desc_by_name (const char *fname)
8aaaec6b
EZ		 4516{
4517 PSECURITY_DESCRIPTOR psd = NULL;
4518 DWORD sd_len, err;
4519 SECURITY_INFORMATION si = OWNER_SECURITY_INFORMATION
4520 | GROUP_SECURITY_INFORMATION /* | DACL_SECURITY_INFORMATION */ ;
4521
4522 if (!get_file_security (fname, si, psd, 0, &sd_len))
4523 {
4524 err = GetLastError ();
4525 if (err != ERROR_INSUFFICIENT_BUFFER)
4526 return NULL;
4527 }
4528
4529 psd = xmalloc (sd_len);
4530 if (!get_file_security (fname, si, psd, sd_len, &sd_len))
4531 {
4532 xfree (psd);
4533 return NULL;
4534 }
4535
4536 return psd;
4537}
4538
4539static DWORD
4540get_rid (PSID sid)
4541{
4542 unsigned n_subauthorities;
4543
4544 /* Use the last sub-authority value of the RID, the relative
4545 portion of the SID, as user/group ID. */
4546 n_subauthorities = *get_sid_sub_authority_count (sid);
4547 if (n_subauthorities < 1)
4548 return 0; /* the "World" RID */
4549 return *get_sid_sub_authority (sid, n_subauthorities - 1);
4550}
4551
f8b35b24
EZ		 4552/* Caching SID and account values for faster lokup. */
4553
f8b35b24 4554struct w32_id {
22749e9a 4555 unsigned rid;
f8b35b24
EZ		 4556 struct w32_id *next;
4557 char name[GNLEN+1];
4558 unsigned char sid[FLEXIBLE_ARRAY_MEMBER];
4559};
4560
4561static struct w32_id *w32_idlist;
4562
4563static int
22749e9a 4564w32_cached_id (PSID sid, unsigned *id, char *name)
f8b35b24
EZ		 4565{
4566 struct w32_id *tail, *found;
4567
4568 for (found = NULL, tail = w32_idlist; tail; tail = tail->next)
4569 {
4570 if (equal_sid ((PSID)tail->sid, sid))
4571 {
4572 found = tail;
4573 break;
4574 }
4575 }
4576 if (found)
4577 {
4578 *id = found->rid;
4579 strcpy (name, found->name);
4580 return 1;
4581 }
4582 else
4583 return 0;
4584}
4585
4586static void
22749e9a 4587w32_add_to_cache (PSID sid, unsigned id, char *name)
f8b35b24
EZ		 4588{
4589 DWORD sid_len;
4590 struct w32_id *new_entry;
4591
4592 /* We don't want to leave behind stale cache from when Emacs was
4593 dumped. */
4594 if (initialized)
4595 {
4596 sid_len = get_length_sid (sid);
4597 new_entry = xmalloc (offsetof (struct w32_id, sid) + sid_len);
4598 if (new_entry)
4599 {
4600 new_entry->rid = id;
4601 strcpy (new_entry->name, name);
4602 copy_sid (sid_len, (PSID)new_entry->sid, sid);
4603 new_entry->next = w32_idlist;
4604 w32_idlist = new_entry;
4605 }
4606 }
4607}
4608
8aaaec6b
EZ		 4609#define UID 1
4610#define GID 2
4611
4612static int
92340ec7 4613get_name_and_id (PSECURITY_DESCRIPTOR psd, unsigned *id, char *nm, int what)
8aaaec6b
EZ		 4614{
4615 PSID sid = NULL;
8aaaec6b
EZ		 4616 BOOL dflt;
4617 SID_NAME_USE ignore;
4618 char name[UNLEN+1];
4619 DWORD name_len = sizeof (name);
4620 char domain[1024];
ed3751c8 4621 DWORD domain_len = sizeof (domain);
8aaaec6b
EZ		 4622 int use_dflt = 0;
4623 int result;
4624
4625 if (what == UID)
4626 result = get_security_descriptor_owner (psd, &sid, &dflt);
4627 else if (what == GID)
4628 result = get_security_descriptor_group (psd, &sid, &dflt);
4629 else
4630 result = 0;
4631
4632 if (!result || !is_valid_sid (sid))
4633 use_dflt = 1;
f8b35b24 4634 else if (!w32_cached_id (sid, id, nm))
8aaaec6b 4635 {
92340ec7 4636 if (!lookup_account_sid (NULL, sid, name, &name_len,
8aaaec6b
EZ		 4637 domain, &domain_len, &ignore)
4638 || name_len > UNLEN+1)
4639 use_dflt = 1;
4640 else
4641 {
4642 *id = get_rid (sid);
4643 strcpy (nm, name);
f8b35b24 4644 w32_add_to_cache (sid, *id, name);
8aaaec6b
EZ		 4645 }
4646 }
4647 return use_dflt;
4648}
4649
4650static void
92340ec7 4651get_file_owner_and_group (PSECURITY_DESCRIPTOR psd, struct stat *st)
8aaaec6b
EZ		 4652{
4653 int dflt_usr = 0, dflt_grp = 0;
4654
4655 if (!psd)
4656 {
4657 dflt_usr = 1;
4658 dflt_grp = 1;
4659 }
4660 else
4661 {
92340ec7 4662 if (get_name_and_id (psd, &st->st_uid, st->st_uname, UID))
8aaaec6b 4663 dflt_usr = 1;
92340ec7 4664 if (get_name_and_id (psd, &st->st_gid, st->st_gname, GID))
8aaaec6b
EZ		 4665 dflt_grp = 1;
4666 }
4667 /* Consider files to belong to current user/group, if we cannot get
4668 more accurate information. */
4669 if (dflt_usr)
4670 {
4671 st->st_uid = dflt_passwd.pw_uid;
4672 strcpy (st->st_uname, dflt_passwd.pw_name);
4673 }
4674 if (dflt_grp)
4675 {
4676 st->st_gid = dflt_passwd.pw_gid;
4677 strcpy (st->st_gname, dflt_group.gr_name);
4678 }
4679}
4680
be4c6380
EZ		 4681/* Return non-zero if NAME is a potentially slow filesystem. */
4682int
4683is_slow_fs (const char *name)
4684{
4685 char drive_root[4];
4686 UINT devtype;
4687
4688 if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1]))
4689 devtype = DRIVE_REMOTE; /* assume UNC name is remote */
4690 else if (!(strlen (name) >= 2 && IS_DEVICE_SEP (name[1])))
4691 devtype = GetDriveType (NULL); /* use root of current drive */
4692 else
4693 {
4694 /* GetDriveType needs the root directory of the drive. */
4695 strncpy (drive_root, name, 2);
4696 drive_root[2] = '\\';
4697 drive_root[3] = '\0';
4698 devtype = GetDriveType (drive_root);
4699 }
4700 return !(devtype == DRIVE_FIXED || devtype == DRIVE_RAMDISK);
4701}
4702
5c207910 4703/* If this is non-zero, the caller wants accurate information about
df87c56c
EZ		 4704 file's owner and group, which could be expensive to get. dired.c
4705 uses this flag when needed for the job at hand. */
5c207910
EZ		 4706int w32_stat_get_owner_group;
4707
480b0c5b
GV		 4708/* MSVC stat function can't cope with UNC names and has other bugs, so
4709 replace it with our own. This also allows us to calculate consistent
df87c56c
EZ		 4710 inode values and owner/group without hacks in the main Emacs code,
4711 and support file names encoded in UTF-8. */
6dad7178
EZ		 4712
4713static int
4714stat_worker (const char * path, struct stat * buf, int follow_symlinks)
480b0c5b 4715{
6dad7178 4716 char *name, *save_name, *r;
df87c56c
EZ		 4717 WIN32_FIND_DATAW wfd_w;
4718 WIN32_FIND_DATAA wfd_a;
480b0c5b 4719 HANDLE fh;
6dad7178 4720 unsigned __int64 fake_inode = 0;
480b0c5b
GV		 4721 int permission;
4722 int len;
4723 int rootdir = FALSE;
8aaaec6b 4724 PSECURITY_DESCRIPTOR psd = NULL;
6dad7178
EZ		 4725 int is_a_symlink = 0;
4726 DWORD file_flags = FILE_FLAG_BACKUP_SEMANTICS;
4727 DWORD access_rights = 0;
4728 DWORD fattrs = 0, serialnum = 0, fs_high = 0, fs_low = 0, nlinks = 1;
4729 FILETIME ctime, atime, wtime;
df87c56c
EZ		 4730 wchar_t name_w[MAX_PATH];
4731 char name_a[MAX_PATH];
480b0c5b
GV		 4732
4733 if (path == NULL || buf == NULL)
4734 {
4735 errno = EFAULT;
4736 return -1;
4737 }
4738
6dad7178 4739 save_name = name = (char *) map_w32_filename (path, &path);
22189f79 4740 /* Must be valid filename, no wild cards or other invalid
df87c56c
EZ		 4741 characters. */
4742 if (strpbrk (name, "*?|<>\""))
480b0c5b
GV		 4743 {
4744 errno = ENOENT;
4745 return -1;
4746 }
4747
480b0c5b 4748 len = strlen (name);
316d9327
EZ		 4749 /* Allocate 1 extra byte so that we could append a slash to a root
4750 directory, down below. */
480b0c5b
GV		 4751 name = strcpy (alloca (len + 2), name);
4752
6dad7178
EZ		 4753 /* Avoid a somewhat costly call to is_symlink if the filesystem
4754 doesn't support symlinks. */
4755 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
4756 is_a_symlink = is_symlink (name);
4757
4758 /* Plan A: Open the file and get all the necessary information via
4759 the resulting handle. This solves several issues in one blow:
4760
4761 . retrieves attributes for the target of a symlink, if needed
4762 . gets attributes of root directories and symlinks pointing to
4763 root directories, thus avoiding the need for special-casing
4764 these and detecting them by examining the file-name format
4765 . retrieves more accurate attributes (e.g., non-zero size for
4766 some directories, esp. directories that are junction points)
4767 . correctly resolves "c:/..", "/.." and similar file names
4768 . avoids run-time penalties for 99% of use cases
4769
4770 Plan A is always tried first, unless the user asked not to (but
4771 if the file is a symlink and we need to follow links, we try Plan
4772 A even if the user asked not to).
4773
4774 If Plan A fails, we go to Plan B (below), where various
4775 potentially expensive techniques must be used to handle "special"
4776 files such as UNC volumes etc. */
8aaaec6b 4777 if (!(NILP (Vw32_get_true_file_attributes)
19ced600 4778 || (EQ (Vw32_get_true_file_attributes, Qlocal) && is_slow_fs (name)))
6dad7178
EZ		 4779 /* Following symlinks requires getting the info by handle. */
4780 || (is_a_symlink && follow_symlinks))
480b0c5b 4781 {
6dad7178
EZ		 4782 BY_HANDLE_FILE_INFORMATION info;
4783
4784 if (is_a_symlink && !follow_symlinks)
4785 file_flags |= FILE_FLAG_OPEN_REPARSE_POINT;
4786 /* READ_CONTROL access rights are required to get security info
4787 by handle. But if the OS doesn't support security in the
4788 first place, we don't need to try. */
4789 if (is_windows_9x () != TRUE)
4790 access_rights |= READ_CONTROL;
4791
df87c56c
EZ		 4792 if (w32_unicode_filenames)
4793 {
4794 filename_to_utf16 (name, name_w);
4795 fh = CreateFileW (name_w, access_rights, 0, NULL, OPEN_EXISTING,
4796 file_flags, NULL);
4797 /* If CreateFile fails with READ_CONTROL, try again with
4798 zero as access rights. */
4799 if (fh == INVALID_HANDLE_VALUE && access_rights)
4800 fh = CreateFileW (name_w, 0, 0, NULL, OPEN_EXISTING,
4801 file_flags, NULL);
4802 }
4803 else
4804 {
4805 filename_to_ansi (name, name_a);
4806 fh = CreateFileA (name_a, access_rights, 0, NULL, OPEN_EXISTING,
4807 file_flags, NULL);
4808 if (fh == INVALID_HANDLE_VALUE && access_rights)
4809 fh = CreateFileA (name_a, 0, 0, NULL, OPEN_EXISTING,
4810 file_flags, NULL);
4811 }
6dad7178
EZ		 4812 if (fh == INVALID_HANDLE_VALUE)
4813 goto no_true_file_attributes;
4814
3ed8598c 4815 /* This is more accurate in terms of getting the correct number
aa5ee2a3 4816 of links, but is quite slow (it is noticeable when Emacs is
480b0c5b 4817 making a list of file name completions). */
480b0c5b
GV		 4818 if (GetFileInformationByHandle (fh, &info))
4819 {
6dad7178 4820 nlinks = info.nNumberOfLinks;
76b3903d
GV		 4821 /* Might as well use file index to fake inode values, but this
4822 is not guaranteed to be unique unless we keep a handle open
4823 all the time (even then there are situations where it is
4824 not unique). Reputedly, there are at most 48 bits of info
4825 (on NTFS, presumably less on FAT). */
e3b88685
EZ		 4826 fake_inode = info.nFileIndexHigh;
4827 fake_inode <<= 32;
4828 fake_inode += info.nFileIndexLow;
6dad7178
EZ		 4829 serialnum = info.dwVolumeSerialNumber;
4830 fs_high = info.nFileSizeHigh;
4831 fs_low = info.nFileSizeLow;
4832 ctime = info.ftCreationTime;
4833 atime = info.ftLastAccessTime;
4834 wtime = info.ftLastWriteTime;
4835 fattrs = info.dwFileAttributes;
480b0c5b
GV		 4836 }
4837 else
4838 {
6dad7178
EZ		 4839 /* We don't go to Plan B here, because it's not clear that
4840 it's a good idea. The only known use case where
4841 CreateFile succeeds, but GetFileInformationByHandle fails
4842 (with ERROR_INVALID_FUNCTION) is for character devices
4843 such as NUL, PRN, etc. For these, switching to Plan B is
4844 a net loss, because we lose the character device
4845 attribute returned by GetFileType below (FindFirstFile
4846 doesn't set that bit in the attributes), and the other
4847 fields don't make sense for character devices anyway.
4848 Emacs doesn't really care for non-file entities in the
4849 context of l?stat, so neither do we. */
4850
4851 /* w32err is assigned so one could put a breakpoint here and
4852 examine its value, when GetFileInformationByHandle
4853 fails. */
4854 DWORD w32err = GetLastError ();
4855
4856 switch (w32err)
4857 {
4858 case ERROR_FILE_NOT_FOUND: /* can this ever happen? */
4859 errno = ENOENT;
4860 return -1;
4861 }
01f31dfb
AI		 4862 }
4863
6dad7178
EZ		 4864 /* Test for a symlink before testing for a directory, since
4865 symlinks to directories have the directory bit set, but we
4866 don't want them to appear as directories. */
4867 if (is_a_symlink && !follow_symlinks)
4868 buf->st_mode = S_IFLNK;
4869 else if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
4870 buf->st_mode = S_IFDIR;
93e0f0da
JR		 4871 else
4872 {
6dad7178
EZ		 4873 DWORD ftype = GetFileType (fh);
4874
4875 switch (ftype)
93e0f0da
JR		 4876 {
4877 case FILE_TYPE_DISK:
e3b88685 4878 buf->st_mode = S_IFREG;
93e0f0da
JR		 4879 break;
4880 case FILE_TYPE_PIPE:
e3b88685 4881 buf->st_mode = S_IFIFO;
93e0f0da
JR		 4882 break;
4883 case FILE_TYPE_CHAR:
4884 case FILE_TYPE_UNKNOWN:
4885 default:
e3b88685 4886 buf->st_mode = S_IFCHR;
93e0f0da 4887 }
480b0c5b 4888 }
6dad7178
EZ		 4889 /* We produce the fallback owner and group data, based on the
4890 current user that runs Emacs, in the following cases:
4891
5c207910 4892 . caller didn't request owner and group info
6dad7178
EZ		 4893 . this is Windows 9X
4894 . getting security by handle failed, and we need to produce
4895 information for the target of a symlink (this is better
4896 than producing a potentially misleading info about the
4897 symlink itself)
4898
4899 If getting security by handle fails, and we don't need to
4900 resolve symlinks, we try getting security by name. */
5c207910 4901 if (!w32_stat_get_owner_group || is_windows_9x () == TRUE)
92340ec7 4902 get_file_owner_and_group (NULL, buf);
5c207910 4903 else
6dad7178 4904 {
5c207910
EZ		 4905 psd = get_file_security_desc_by_handle (fh);
4906 if (psd)
4907 {
a4b0cca1 4908 get_file_owner_and_group (psd, buf);
5c207910
EZ		 4909 LocalFree (psd);
4910 }
4911 else if (!(is_a_symlink && follow_symlinks))
4912 {
4913 psd = get_file_security_desc_by_name (name);
a4b0cca1 4914 get_file_owner_and_group (psd, buf);
5c207910
EZ		 4915 xfree (psd);
4916 }
4917 else
a4b0cca1 4918 get_file_owner_and_group (NULL, buf);
6dad7178 4919 }
01f31dfb 4920 CloseHandle (fh);
76b3903d
GV		 4921 }
4922 else
4923 {
6dad7178
EZ		 4924 no_true_file_attributes:
4925 /* Plan B: Either getting a handle on the file failed, or the
4926 caller explicitly asked us to not bother making this
4927 information more accurate.
4928
4929 Implementation note: In Plan B, we never bother to resolve
4930 symlinks, even if we got here because we tried Plan A and
4931 failed. That's because, even if the caller asked for extra
4932 precision by setting Vw32_get_true_file_attributes to t,
4933 resolving symlinks requires acquiring a file handle to the
4934 symlink, which we already know will fail. And if the user
4935 did not ask for extra precision, resolving symlinks will fly
4936 in the face of that request, since the user then wants the
4937 lightweight version of the code. */
4938 rootdir = (path >= save_name + len - 1
4939 && (IS_DIRECTORY_SEP (*path) || *path == 0));
4940
4941 /* If name is "c:/.." or "/.." then stat "c:/" or "/". */
4942 r = IS_DEVICE_SEP (name[1]) ? &name[2] : name;
4943 if (IS_DIRECTORY_SEP (r[0])
4944 && r[1] == '.' && r[2] == '.' && r[3] == '\0')
4945 r[1] = r[2] = '\0';
4946
4947 /* Note: If NAME is a symlink to the root of a UNC volume
4948 (i.e. "\\SERVER"), we will not detect that here, and we will
4949 return data about the symlink as result of FindFirst below.
4950 This is unfortunate, but that marginal use case does not
4951 justify a call to chase_symlinks which would impose a penalty
4952 on all the other use cases. (We get here for symlinks to
4953 roots of UNC volumes because CreateFile above fails for them,
4954 unlike with symlinks to root directories X:\ of drives.) */
4955 if (is_unc_volume (name))
4956 {
4957 fattrs = unc_volume_file_attributes (name);
4958 if (fattrs == -1)
4959 return -1;
4960
4961 ctime = atime = wtime = utc_base_ft;
4962 }
4963 else if (rootdir)
4964 {
316d9327 4965 /* Make sure root directories end in a slash. */
df87c56c
EZ		 4966 if (!IS_DIRECTORY_SEP (name[len-1]))
4967 strcat (name, "\\");
6dad7178
EZ		 4968 if (GetDriveType (name) < 2)
4969 {
4970 errno = ENOENT;
4971 return -1;
4972 }
4973
4974 fattrs = FILE_ATTRIBUTE_DIRECTORY;
4975 ctime = atime = wtime = utc_base_ft;
4976 }
4977 else
4978 {
df87c56c 4979 int have_wfd = -1;
806fed21 4980
316d9327
EZ		 4981 /* Make sure non-root directories do NOT end in a slash,
4982 otherwise FindFirstFile might fail. */
df87c56c
EZ		 4983 if (IS_DIRECTORY_SEP (name[len-1]))
4984 name[len - 1] = 0;
6dad7178
EZ		 4985
4986 /* (This is hacky, but helps when doing file completions on
4987 network drives.) Optimize by using information available from
4988 active readdir if possible. */
4989 len = strlen (dir_pathname);
df87c56c
EZ		 4990 if (IS_DIRECTORY_SEP (dir_pathname[len-1]))
4991 len--;
6dad7178 4992 if (dir_find_handle != INVALID_HANDLE_VALUE
df87c56c 4993 && last_dir_find_data != -1
6dad7178 4994 && !(is_a_symlink && follow_symlinks)
df87c56c
EZ		 4995 /* The 2 file-name comparisons below support only ASCII
4996 characters, and will lose (compare not equal) when
32e93c9e 4997 the file names include non-ASCII characters that are
df87c56c
EZ		 4998 the same but for the case. However, doing this
4999 properly involves: (a) converting both file names to
5000 UTF-16, (b) lower-casing both names using CharLowerW,
5001 and (c) comparing the results; this would be quite a
5002 bit slower, whereas Plan B is for users who want
5003 lightweight albeit inaccurate version of 'stat'. */
5004 && c_strncasecmp (save_name, dir_pathname, len) == 0
6dad7178
EZ		 5005 && IS_DIRECTORY_SEP (name[len])
5006 && xstrcasecmp (name + len + 1, dir_static.d_name) == 0)
5007 {
df87c56c 5008 have_wfd = last_dir_find_data;
6dad7178 5009 /* This was the last entry returned by readdir. */
df87c56c
EZ		 5010 if (last_dir_find_data == DIR_FIND_DATA_W)
5011 wfd_w = dir_find_data_w;
5012 else
5013 wfd_a = dir_find_data_a;
6dad7178
EZ		 5014 }
5015 else
5016 {
5017 logon_network_drive (name);
5018
df87c56c
EZ		 5019 if (w32_unicode_filenames)
5020 {
5021 filename_to_utf16 (name, name_w);
5022 fh = FindFirstFileW (name_w, &wfd_w);
5023 have_wfd = DIR_FIND_DATA_W;
5024 }
5025 else
5026 {
5027 filename_to_ansi (name, name_a);
5028 /* If NAME includes characters not representable by
5029 the current ANSI codepage, filename_to_ansi
5030 usually replaces them with a '?'. We don't want
32e93c9e 5031 to let FindFirstFileA interpret those as wildcards,
df87c56c
EZ		 5032 and "succeed", returning us data from some random
5033 file in the same directory. */
5034 if (_mbspbrk (name_a, "?"))
5035 fh = INVALID_HANDLE_VALUE;
5036 else
5037 fh = FindFirstFileA (name_a, &wfd_a);
5038 have_wfd = DIR_FIND_DATA_A;
5039 }
6dad7178
EZ		 5040 if (fh == INVALID_HANDLE_VALUE)
5041 {
5042 errno = ENOENT;
5043 return -1;
5044 }
5045 FindClose (fh);
5046 }
5047 /* Note: if NAME is a symlink, the information we get from
5048 FindFirstFile is for the symlink, not its target. */
df87c56c
EZ		 5049 if (have_wfd == DIR_FIND_DATA_W)
5050 {
5051 fattrs = wfd_w.dwFileAttributes;
5052 ctime = wfd_w.ftCreationTime;
5053 atime = wfd_w.ftLastAccessTime;
5054 wtime = wfd_w.ftLastWriteTime;
5055 fs_high = wfd_w.nFileSizeHigh;
5056 fs_low = wfd_w.nFileSizeLow;
5057 }
5058 else
5059 {
5060 fattrs = wfd_a.dwFileAttributes;
5061 ctime = wfd_a.ftCreationTime;
5062 atime = wfd_a.ftLastAccessTime;
5063 wtime = wfd_a.ftLastWriteTime;
5064 fs_high = wfd_a.nFileSizeHigh;
5065 fs_low = wfd_a.nFileSizeLow;
5066 }
6dad7178
EZ		 5067 fake_inode = 0;
5068 nlinks = 1;
5069 serialnum = volume_info.serialnum;
5070 }
5071 if (is_a_symlink && !follow_symlinks)
5072 buf->st_mode = S_IFLNK;
5073 else if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
5074 buf->st_mode = S_IFDIR;
5075 else
5076 buf->st_mode = S_IFREG;
8aaaec6b 5077
92340ec7 5078 get_file_owner_and_group (NULL, buf);
76b3903d
GV		 5079 }
5080
6dad7178 5081 buf->st_ino = fake_inode;
480b0c5b 5082
6dad7178
EZ		 5083 buf->st_dev = serialnum;
5084 buf->st_rdev = serialnum;
480b0c5b 5085
6dad7178 5086 buf->st_size = fs_high;
8aaaec6b 5087 buf->st_size <<= 32;
6dad7178
EZ		 5088 buf->st_size += fs_low;
5089 buf->st_nlink = nlinks;
480b0c5b
GV		 5090
5091 /* Convert timestamps to Unix format. */
6dad7178
EZ		 5092 buf->st_mtime = convert_time (wtime);
5093 buf->st_atime = convert_time (atime);
480b0c5b 5094 if (buf->st_atime == 0) buf->st_atime = buf->st_mtime;
6dad7178 5095 buf->st_ctime = convert_time (ctime);
480b0c5b
GV		 5096 if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime;
5097
5098 /* determine rwx permissions */
6dad7178
EZ		 5099 if (is_a_symlink && !follow_symlinks)
5100 permission = S_IREAD | S_IWRITE | S_IEXEC; /* Posix expectations */
480b0c5b 5101 else
6dad7178
EZ		 5102 {
5103 if (fattrs & FILE_ATTRIBUTE_READONLY)
5104 permission = S_IREAD;
5105 else
5106 permission = S_IREAD | S_IWRITE;
177c0ea7 5107
6dad7178
EZ		 5108 if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
5109 permission |= S_IEXEC;
5110 else if (is_exec (name))
5111 permission |= S_IEXEC;
5112 }
480b0c5b
GV		 5113
5114 buf->st_mode |= permission | (permission >> 3) | (permission >> 6);
5115
5116 return 0;
5117}
5118
6dad7178
EZ		 5119int
5120stat (const char * path, struct stat * buf)
5121{
5122 return stat_worker (path, buf, 1);
5123}
5124
5125int
5126lstat (const char * path, struct stat * buf)
5127{
5128 return stat_worker (path, buf, 0);
5129}
5130
8654f9d7
PE		 5131int
5132fstatat (int fd, char const *name, struct stat *st, int flags)
5133{
5134 /* Rely on a hack: an open directory is modeled as file descriptor 0.
5135 This is good enough for the current usage in Emacs, but is fragile.
5136
d9c287e5 5137 FIXME: Add proper support for fdopendir, fstatat, readlinkat.
8654f9d7 5138 Gnulib does this and can serve as a model. */
df87c56c 5139 char fullname[MAX_UTF8_PATH];
8654f9d7
PE		 5140
5141 if (fd != AT_FDCWD)
5142 {
70db0db7
EZ		 5143 char lastc = dir_pathname[strlen (dir_pathname) - 1];
5144
5145 if (_snprintf (fullname, sizeof fullname, "%s%s%s",
5146 dir_pathname, IS_DIRECTORY_SEP (lastc) ? "" : "/", name)
8654f9d7
PE		 5147 < 0)
5148 {
5149 errno = ENAMETOOLONG;
5150 return -1;
5151 }
5152 name = fullname;
5153 }
5154
5155 return stat_worker (name, st, ! (flags & AT_SYMLINK_NOFOLLOW));
5156}
5157
16bb7578
GV		 5158/* Provide fstat and utime as well as stat for consistent handling of
5159 file timestamps. */
5160int
5161fstat (int desc, struct stat * buf)
5162{
5163 HANDLE fh = (HANDLE) _get_osfhandle (desc);
5164 BY_HANDLE_FILE_INFORMATION info;
e3b88685 5165 unsigned __int64 fake_inode;
16bb7578
GV		 5166 int permission;
5167
5168 switch (GetFileType (fh) & ~FILE_TYPE_REMOTE)
5169 {
5170 case FILE_TYPE_DISK:
e3b88685 5171 buf->st_mode = S_IFREG;
16bb7578
GV		 5172 if (!GetFileInformationByHandle (fh, &info))
5173 {
5174 errno = EACCES;
5175 return -1;
5176 }
5177 break;
5178 case FILE_TYPE_PIPE:
e3b88685 5179 buf->st_mode = S_IFIFO;
16bb7578
GV		 5180 goto non_disk;
5181 case FILE_TYPE_CHAR:
5182 case FILE_TYPE_UNKNOWN:
5183 default:
e3b88685 5184 buf->st_mode = S_IFCHR;
16bb7578
GV		 5185 non_disk:
5186 memset (&info, 0, sizeof (info));
5187 info.dwFileAttributes = 0;
5188 info.ftCreationTime = utc_base_ft;
5189 info.ftLastAccessTime = utc_base_ft;
5190 info.ftLastWriteTime = utc_base_ft;
5191 }
5192
5193 if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
e3b88685 5194 buf->st_mode = S_IFDIR;
93e0f0da
JR		 5195
5196 buf->st_nlink = info.nNumberOfLinks;
5197 /* Might as well use file index to fake inode values, but this
5198 is not guaranteed to be unique unless we keep a handle open
5199 all the time (even then there are situations where it is
5200 not unique). Reputedly, there are at most 48 bits of info
5201 (on NTFS, presumably less on FAT). */
e3b88685
EZ		 5202 fake_inode = info.nFileIndexHigh;
5203 fake_inode <<= 32;
5204 fake_inode += info.nFileIndexLow;
16bb7578
GV		 5205
5206 /* MSVC defines _ino_t to be short; other libc's might not. */
5207 if (sizeof (buf->st_ino) == 2)
5208 buf->st_ino = fake_inode ^ (fake_inode >> 16);
5209 else
5210 buf->st_ino = fake_inode;
5211
76e9f7b9
EZ		 5212 /* If the caller so requested, get the true file owner and group.
5213 Otherwise, consider the file to belong to the current user. */
5214 if (!w32_stat_get_owner_group || is_windows_9x () == TRUE)
5215 get_file_owner_and_group (NULL, buf);
5216 else
5217 {
5218 PSECURITY_DESCRIPTOR psd = NULL;
5219
5220 psd = get_file_security_desc_by_handle (fh);
5221 if (psd)
5222 {
5223 get_file_owner_and_group (psd, buf);
5224 LocalFree (psd);
5225 }
5226 else
5227 get_file_owner_and_group (NULL, buf);
5228 }
16bb7578
GV		 5229
5230 buf->st_dev = info.dwVolumeSerialNumber;
5231 buf->st_rdev = info.dwVolumeSerialNumber;
5232
8aaaec6b
EZ		 5233 buf->st_size = info.nFileSizeHigh;
5234 buf->st_size <<= 32;
5235 buf->st_size += info.nFileSizeLow;
16bb7578
GV		 5236
5237 /* Convert timestamps to Unix format. */
5238 buf->st_mtime = convert_time (info.ftLastWriteTime);
5239 buf->st_atime = convert_time (info.ftLastAccessTime);
5240 if (buf->st_atime == 0) buf->st_atime = buf->st_mtime;
5241 buf->st_ctime = convert_time (info.ftCreationTime);
5242 if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime;
5243
5244 /* determine rwx permissions */
5245 if (info.dwFileAttributes & FILE_ATTRIBUTE_READONLY)
e3b88685 5246 permission = S_IREAD;
16bb7578 5247 else
e3b88685 5248 permission = S_IREAD | S_IWRITE;
177c0ea7 5249
16bb7578 5250 if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
e3b88685 5251 permission |= S_IEXEC;
16bb7578
GV		 5252 else
5253 {
5254#if 0 /* no way of knowing the filename */
5255 char * p = strrchr (name, '.');
5256 if (p != NULL &&
05131107
JR		 5257 (xstrcasecmp (p, ".exe") == 0 ||
5258 xstrcasecmp (p, ".com") == 0 ||
5259 xstrcasecmp (p, ".bat") == 0 ||
5260 xstrcasecmp (p, ".cmd") == 0))
e3b88685 5261 permission |= S_IEXEC;
16bb7578
GV		 5262#endif
5263 }
5264
5265 buf->st_mode |= permission | (permission >> 3) | (permission >> 6);
5266
5267 return 0;
5268}
5269
b34454d0
EZ		 5270/* A version of 'utime' which handles directories as well as
5271 files. */
5272
16bb7578 5273int
86e93460 5274utime (const char *name, struct utimbuf *times)
16bb7578 5275{
86e93460 5276 struct utimbuf deftime;
16bb7578
GV		 5277 HANDLE fh;
5278 FILETIME mtime;
5279 FILETIME atime;
5280
5281 if (times == NULL)
5282 {
5283 deftime.modtime = deftime.actime = time (NULL);
5284 times = &deftime;
5285 }
5286
80fcb9d2
EZ		 5287 if (w32_unicode_filenames)
5288 {
5289 wchar_t name_utf16[MAX_PATH];
5290
5291 if (filename_to_utf16 (name, name_utf16) != 0)
5292 return -1; /* errno set by filename_to_utf16 */
5293
5294 /* Need write access to set times. */
5295 fh = CreateFileW (name_utf16, FILE_WRITE_ATTRIBUTES,
5296 /* If NAME specifies a directory, FILE_SHARE_DELETE
5297 allows other processes to delete files inside it,
5298 while we have the directory open. */
5299 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
5300 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
5301 }
5302 else
5303 {
5304 char name_ansi[MAX_PATH];
5305
5306 if (filename_to_ansi (name, name_ansi) != 0)
5307 return -1; /* errno set by filename_to_ansi */
5308
5309 fh = CreateFileA (name_ansi, FILE_WRITE_ATTRIBUTES,
5310 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
5311 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
5312 }
7604f298 5313 if (fh != INVALID_HANDLE_VALUE)
16bb7578
GV		 5314 {
5315 convert_from_time_t (times->actime, &atime);
5316 convert_from_time_t (times->modtime, &mtime);
5317 if (!SetFileTime (fh, NULL, &atime, &mtime))
5318 {
5319 CloseHandle (fh);
5320 errno = EACCES;
5321 return -1;
5322 }
5323 CloseHandle (fh);
5324 }
5325 else
5326 {
80fcb9d2
EZ		 5327 DWORD err = GetLastError ();
5328
5329 switch (err)
5330 {
5331 case ERROR_FILE_NOT_FOUND:
5332 case ERROR_PATH_NOT_FOUND:
5333 case ERROR_INVALID_DRIVE:
5334 case ERROR_BAD_NETPATH:
5335 case ERROR_DEV_NOT_EXIST:
5336 /* ERROR_INVALID_NAME is the error CreateFile sets when the
5337 file name includes ?s, i.e. translation to ANSI failed. */
5338 case ERROR_INVALID_NAME:
5339 errno = ENOENT;
5340 break;
5341 case ERROR_TOO_MANY_OPEN_FILES:
5342 errno = ENFILE;
5343 break;
5344 case ERROR_ACCESS_DENIED:
5345 case ERROR_SHARING_VIOLATION:
5346 errno = EACCES;
5347 break;
5348 default:
5349 errno = EINVAL;
5350 break;
5351 }
16bb7578
GV		 5352 return -1;
5353 }
5354 return 0;
5355}
5356
1b7259fc
EZ		 5357int
5358sys_umask (int mode)
5359{
5360 static int current_mask;
5361 int retval, arg = 0;
5362
5363 /* The only bit we really support is the write bit. Files are
5364 always readable on MS-Windows, and the execute bit does not exist
5365 at all. */
5366 /* FIXME: if the GROUP and OTHER bits are reset, we should use ACLs
5367 to prevent access by other users on NTFS. */
95765a6a 5368 if ((mode & S_IWRITE) != 0)
1b7259fc
EZ		 5369 arg |= S_IWRITE;
5370
5371 retval = _umask (arg);
5372 /* Merge into the return value the bits they've set the last time,
5373 which msvcrt.dll ignores and never returns. Emacs insists on its
5374 notion of mask being identical to what we return. */
95765a6a 5375 retval |= (current_mask & ~S_IWRITE);
1b7259fc
EZ		 5376 current_mask = mode;
5377
5378 return retval;
5379}
5380
7c80d5ec 5381\f
6dad7178
EZ		 5382/* Symlink-related functions. */
5383#ifndef SYMBOLIC_LINK_FLAG_DIRECTORY
5384#define SYMBOLIC_LINK_FLAG_DIRECTORY 0x1
5385#endif
5386
0f7bb05d 5387int
6dad7178 5388symlink (char const *filename, char const *linkname)
0f7bb05d 5389{
eeccd06f 5390 char linkfn[MAX_UTF8_PATH], *tgtfn;
6dad7178
EZ		 5391 DWORD flags = 0;
5392 int dir_access, filename_ends_in_slash;
5393
5394 /* Diagnostics follows Posix as much as possible. */
5395 if (filename == NULL || linkname == NULL)
5396 {
5397 errno = EFAULT;
5398 return -1;
5399 }
5400 if (!*filename)
5401 {
5402 errno = ENOENT;
5403 return -1;
5404 }
eeccd06f 5405 if (strlen (filename) > MAX_UTF8_PATH || strlen (linkname) > MAX_UTF8_PATH)
6dad7178
EZ		 5406 {
5407 errno = ENAMETOOLONG;
5408 return -1;
5409 }
5410
5411 strcpy (linkfn, map_w32_filename (linkname, NULL));
5412 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) == 0)
5413 {
5414 errno = EPERM;
5415 return -1;
5416 }
5417
5418 /* Note: since empty FILENAME was already rejected, we can safely
5419 refer to FILENAME[1]. */
5420 if (!(IS_DIRECTORY_SEP (filename[0]) || IS_DEVICE_SEP (filename[1])))
5421 {
5422 /* Non-absolute FILENAME is understood as being relative to
5423 LINKNAME's directory. We need to prepend that directory to
14f20728 5424 FILENAME to get correct results from faccessat below, since
6dad7178
EZ		 5425 otherwise it will interpret FILENAME relative to the
5426 directory where the Emacs process runs. Note that
5427 make-symbolic-link always makes sure LINKNAME is a fully
5428 expanded file name. */
eeccd06f 5429 char tem[MAX_UTF8_PATH];
6dad7178
EZ		 5430 char *p = linkfn + strlen (linkfn);
5431
eeccd06f
EZ		 5432 while (p > linkfn && !IS_ANY_SEP (p[-1]))
5433 p--;
6dad7178
EZ		 5434 if (p > linkfn)
5435 strncpy (tem, linkfn, p - linkfn);
5436 tem[p - linkfn] = '\0';
5437 strcat (tem, filename);
14f20728 5438 dir_access = faccessat (AT_FDCWD, tem, D_OK, AT_EACCESS);
6dad7178
EZ		 5439 }
5440 else
14f20728 5441 dir_access = faccessat (AT_FDCWD, filename, D_OK, AT_EACCESS);
6dad7178
EZ		 5442
5443 /* Since Windows distinguishes between symlinks to directories and
8b2e00a3 5444 to files, we provide a kludgy feature: if FILENAME doesn't
6dad7178
EZ		 5445 exist, but ends in a slash, we create a symlink to directory. If
5446 FILENAME exists and is a directory, we always create a symlink to
5447 directory. */
eeccd06f 5448 filename_ends_in_slash = IS_DIRECTORY_SEP (filename[strlen (filename) - 1]);
6dad7178
EZ		 5449 if (dir_access == 0 || filename_ends_in_slash)
5450 flags = SYMBOLIC_LINK_FLAG_DIRECTORY;
5451
5452 tgtfn = (char *)map_w32_filename (filename, NULL);
5453 if (filename_ends_in_slash)
5454 tgtfn[strlen (tgtfn) - 1] = '\0';
5455
5456 errno = 0;
5457 if (!create_symbolic_link (linkfn, tgtfn, flags))
5458 {
5459 /* ENOSYS is set by create_symbolic_link, when it detects that
5460 the OS doesn't support the CreateSymbolicLink API. */
5461 if (errno != ENOSYS)
5462 {
5463 DWORD w32err = GetLastError ();
5464
5465 switch (w32err)
5466 {
5467 /* ERROR_SUCCESS is sometimes returned when LINKFN and
5468 TGTFN point to the same file name, go figure. */
5469 case ERROR_SUCCESS:
5470 case ERROR_FILE_EXISTS:
5471 errno = EEXIST;
5472 break;
5473 case ERROR_ACCESS_DENIED:
5474 errno = EACCES;
5475 break;
5476 case ERROR_FILE_NOT_FOUND:
5477 case ERROR_PATH_NOT_FOUND:
5478 case ERROR_BAD_NETPATH:
5479 case ERROR_INVALID_REPARSE_DATA:
5480 errno = ENOENT;
5481 break;
5482 case ERROR_DIRECTORY:
5483 errno = EISDIR;
5484 break;
5485 case ERROR_PRIVILEGE_NOT_HELD:
5486 case ERROR_NOT_ALL_ASSIGNED:
5487 errno = EPERM;
5488 break;
5489 case ERROR_DISK_FULL:
5490 errno = ENOSPC;
5491 break;
5492 default:
5493 errno = EINVAL;
5494 break;
5495 }
5496 }
5497 return -1;
5498 }
5499 return 0;
0f7bb05d
EZ		 5500}
5501
6dad7178
EZ		 5502/* A quick inexpensive test of whether FILENAME identifies a file that
5503 is a symlink. Returns non-zero if it is, zero otherwise. FILENAME
5504 must already be in the normalized form returned by
5505 map_w32_filename.
5506
5507 Note: for repeated operations on many files, it is best to test
5508 whether the underlying volume actually supports symlinks, by
5509 testing the FILE_SUPPORTS_REPARSE_POINTS bit in volume's flags, and
5510 avoid the call to this function if it doesn't. That's because the
8b2e00a3 5511 call to GetFileAttributes takes a non-negligible time, especially
6dad7178
EZ		 5512 on non-local or removable filesystems. See stat_worker for an
5513 example of how to do that. */
5514static int
5515is_symlink (const char *filename)
5516{
5517 DWORD attrs;
eeccd06f
EZ		 5518 wchar_t filename_w[MAX_PATH];
5519 char filename_a[MAX_PATH];
5520 WIN32_FIND_DATAW wfdw;
5521 WIN32_FIND_DATAA wfda;
6dad7178 5522 HANDLE fh;
eeccd06f 5523 int attrs_mean_symlink;
6dad7178 5524
eeccd06f
EZ		 5525 if (w32_unicode_filenames)
5526 {
5527 filename_to_utf16 (filename, filename_w);
5528 attrs = GetFileAttributesW (filename_w);
5529 }
5530 else
5531 {
5532 filename_to_ansi (filename, filename_a);
5533 attrs = GetFileAttributesA (filename_a);
5534 }
6dad7178
EZ		 5535 if (attrs == -1)
5536 {
5537 DWORD w32err = GetLastError ();
5538
5539 switch (w32err)
5540 {
5541 case ERROR_BAD_NETPATH: /* network share, can't be a symlink */
5542 break;
5543 case ERROR_ACCESS_DENIED:
5544 errno = EACCES;
5545 break;
5546 case ERROR_FILE_NOT_FOUND:
5547 case ERROR_PATH_NOT_FOUND:
5548 default:
5549 errno = ENOENT;
5550 break;
5551 }
5552 return 0;
5553 }
5554 if ((attrs & FILE_ATTRIBUTE_REPARSE_POINT) == 0)
5555 return 0;
5556 logon_network_drive (filename);
eeccd06f
EZ		 5557 if (w32_unicode_filenames)
5558 {
5559 fh = FindFirstFileW (filename_w, &wfdw);
5560 attrs_mean_symlink =
5561 (wfdw.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) != 0
5562 && (wfdw.dwReserved0 & IO_REPARSE_TAG_SYMLINK) == IO_REPARSE_TAG_SYMLINK;
5563 }
5564 else if (_mbspbrk (filename_a, "?"))
5565 {
5566 /* filename_to_ansi failed to convert the file name. */
5567 errno = ENOENT;
5568 return 0;
5569 }
5570 else
5571 {
5572 fh = FindFirstFileA (filename_a, &wfda);
5573 attrs_mean_symlink =
5574 (wfda.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) != 0
5575 && (wfda.dwReserved0 & IO_REPARSE_TAG_SYMLINK) == IO_REPARSE_TAG_SYMLINK;
5576 }
6dad7178
EZ		 5577 if (fh == INVALID_HANDLE_VALUE)
5578 return 0;
5579 FindClose (fh);
eeccd06f 5580 return attrs_mean_symlink;
6dad7178
EZ		 5581}
5582
5583/* If NAME identifies a symbolic link, copy into BUF the file name of
5584 the symlink's target. Copy at most BUF_SIZE bytes, and do NOT
5585 null-terminate the target name, even if it fits. Return the number
5586 of bytes copied, or -1 if NAME is not a symlink or any error was
5587 encountered while resolving it. The file name copied into BUF is
5588 encoded in the current ANSI codepage. */
0f7bb05d 5589ssize_t
6dad7178 5590readlink (const char *name, char *buf, size_t buf_size)
0f7bb05d 5591{
6dad7178
EZ		 5592 const char *path;
5593 TOKEN_PRIVILEGES privs;
5594 int restore_privs = 0;
5595 HANDLE sh;
5596 ssize_t retval;
eeccd06f 5597 char resolved[MAX_UTF8_PATH];
6dad7178
EZ		 5598
5599 if (name == NULL)
5600 {
5601 errno = EFAULT;
5602 return -1;
5603 }
5604 if (!*name)
5605 {
5606 errno = ENOENT;
5607 return -1;
5608 }
5609
5610 path = map_w32_filename (name, NULL);
5611
eeccd06f 5612 if (strlen (path) > MAX_UTF8_PATH)
6dad7178
EZ		 5613 {
5614 errno = ENAMETOOLONG;
5615 return -1;
5616 }
5617
5618 errno = 0;
5619 if (is_windows_9x () == TRUE
5620 || (volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) == 0
5621 || !is_symlink (path))
5622 {
5623 if (!errno)
5624 errno = EINVAL; /* not a symlink */
5625 return -1;
5626 }
5627
5628 /* Done with simple tests, now we're in for some _real_ work. */
5629 if (enable_privilege (SE_BACKUP_NAME, TRUE, &privs))
5630 restore_privs = 1;
5631 /* Implementation note: From here and onward, don't return early,
5632 since that will fail to restore the original set of privileges of
5633 the calling thread. */
5634
5635 retval = -1; /* not too optimistic, are we? */
5636
5637 /* Note: In the next call to CreateFile, we use zero as the 2nd
5638 argument because, when the symlink is a hidden/system file,
5639 e.g. 'C:\Users\All Users', GENERIC_READ fails with
5640 ERROR_ACCESS_DENIED. Zero seems to work just fine, both for file
5641 and directory symlinks. */
eeccd06f
EZ		 5642 if (w32_unicode_filenames)
5643 {
5644 wchar_t path_w[MAX_PATH];
5645
5646 filename_to_utf16 (path, path_w);
5647 sh = CreateFileW (path_w, 0, 0, NULL, OPEN_EXISTING,
5648 FILE_FLAG_OPEN_REPARSE_POINT
5649 | FILE_FLAG_BACKUP_SEMANTICS,
5650 NULL);
5651 }
5652 else
5653 {
5654 char path_a[MAX_PATH];
5655
5656 filename_to_ansi (path, path_a);
5657 sh = CreateFileA (path_a, 0, 0, NULL, OPEN_EXISTING,
5658 FILE_FLAG_OPEN_REPARSE_POINT
5659 | FILE_FLAG_BACKUP_SEMANTICS,
5660 NULL);
5661 }
6dad7178
EZ		 5662 if (sh != INVALID_HANDLE_VALUE)
5663 {
5664 BYTE reparse_buf[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
5665 REPARSE_DATA_BUFFER *reparse_data = (REPARSE_DATA_BUFFER *)&reparse_buf[0];
5666 DWORD retbytes;
5667
5668 if (!DeviceIoControl (sh, FSCTL_GET_REPARSE_POINT, NULL, 0,
5669 reparse_buf, MAXIMUM_REPARSE_DATA_BUFFER_SIZE,
5670 &retbytes, NULL))
5671 errno = EIO;
5672 else if (reparse_data->ReparseTag != IO_REPARSE_TAG_SYMLINK)
5673 errno = EINVAL;
5674 else
5675 {
474d441e 5676 /* Copy the link target name, in wide characters, from
6dad7178
EZ		 5677 reparse_data, then convert it to multibyte encoding in
5678 the current locale's codepage. */
5679 WCHAR *lwname;
eeccd06f 5680 size_t lname_size;
6dad7178
EZ		 5681 USHORT lwname_len =
5682 reparse_data->SymbolicLinkReparseBuffer.PrintNameLength;
5683 WCHAR *lwname_src =
5684 reparse_data->SymbolicLinkReparseBuffer.PathBuffer
5685 + reparse_data->SymbolicLinkReparseBuffer.PrintNameOffset/sizeof(WCHAR);
eeccd06f 5686 size_t size_to_copy = buf_size;
6dad7178
EZ		 5687
5688 /* According to MSDN, PrintNameLength does not include the
5689 terminating null character. */
5690 lwname = alloca ((lwname_len + 1) * sizeof(WCHAR));
5691 memcpy (lwname, lwname_src, lwname_len);
5692 lwname[lwname_len/sizeof(WCHAR)] = 0; /* null-terminate */
eeccd06f
EZ		 5693 filename_from_utf16 (lwname, resolved);
5694 dostounix_filename (resolved);
5695 lname_size = strlen (resolved) + 1;
5696 if (lname_size <= buf_size)
5697 size_to_copy = lname_size;
5698 strncpy (buf, resolved, size_to_copy);
5699 /* Success! */
5700 retval = size_to_copy;
6dad7178
EZ		 5701 }
5702 CloseHandle (sh);
5703 }
5704 else
5705 {
5706 /* CreateFile failed. */
5707 DWORD w32err2 = GetLastError ();
5708
5709 switch (w32err2)
5710 {
5711 case ERROR_FILE_NOT_FOUND:
5712 case ERROR_PATH_NOT_FOUND:
5713 errno = ENOENT;
5714 break;
5715 case ERROR_ACCESS_DENIED:
5716 case ERROR_TOO_MANY_OPEN_FILES:
5717 errno = EACCES;
5718 break;
5719 default:
5720 errno = EPERM;
5721 break;
5722 }
5723 }
5724 if (restore_privs)
5725 {
5726 restore_privilege (&privs);
5727 revert_to_self ();
5728 }
5729
5730 return retval;
0f7bb05d
EZ		 5731}
5732
8654f9d7
PE		 5733ssize_t
5734readlinkat (int fd, char const *name, char *buffer,
5735 size_t buffer_size)
5736{
5737 /* Rely on a hack: an open directory is modeled as file descriptor 0,
5738 as in fstatat. FIXME: Add proper support for readlinkat. */
eeccd06f 5739 char fullname[MAX_UTF8_PATH];
8654f9d7
PE		 5740
5741 if (fd != AT_FDCWD)
5742 {
5743 if (_snprintf (fullname, sizeof fullname, "%s/%s", dir_pathname, name)
5744 < 0)
5745 {
5746 errno = ENAMETOOLONG;
5747 return -1;
5748 }
5749 name = fullname;
5750 }
5751
5752 return readlink (name, buffer, buffer_size);
5753}
5754
6dad7178
EZ		 5755/* If FILE is a symlink, return its target (stored in a static
5756 buffer); otherwise return FILE.
5757
5758 This function repeatedly resolves symlinks in the last component of
5759 a chain of symlink file names, as in foo -> bar -> baz -> ...,
5760 until it arrives at a file whose last component is not a symlink,
5761 or some error occurs. It returns the target of the last
5762 successfully resolved symlink in the chain. If it succeeds to
5763 resolve even a single symlink, the value returned is an absolute
5764 file name with backslashes (result of GetFullPathName). By
5765 contrast, if the original FILE is returned, it is unaltered.
5766
5767 Note: This function can set errno even if it succeeds.
5768
5769 Implementation note: we only resolve the last portion ("basename")
5770 of the argument FILE and of each following file in the chain,
5771 disregarding any possible symlinks in its leading directories.
5772 This is because Windows system calls and library functions
5773 transparently resolve symlinks in leading directories and return
5774 correct information, as long as the basename is not a symlink. */
5775static char *
5776chase_symlinks (const char *file)
5777{
eeccd06f
EZ		 5778 static char target[MAX_UTF8_PATH];
5779 char link[MAX_UTF8_PATH];
5780 wchar_t target_w[MAX_PATH], link_w[MAX_PATH];
5781 char target_a[MAX_PATH], link_a[MAX_PATH];
6dad7178
EZ		 5782 ssize_t res, link_len;
5783 int loop_count = 0;
5784
5785 if (is_windows_9x () == TRUE || !is_symlink (file))
5786 return (char *)file;
5787
eeccd06f
EZ		 5788 if (w32_unicode_filenames)
5789 {
5790 wchar_t file_w[MAX_PATH];
5791
5792 filename_to_utf16 (file, file_w);
5793 if (GetFullPathNameW (file_w, MAX_PATH, link_w, NULL) == 0)
5794 return (char *)file;
5795 filename_from_utf16 (link_w, link);
5796 }
5797 else
5798 {
5799 char file_a[MAX_PATH];
5800
5801 filename_to_ansi (file, file_a);
5802 if (GetFullPathNameA (file_a, MAX_PATH, link_a, NULL) == 0)
5803 return (char *)file;
5804 filename_from_ansi (link_a, link);
5805 }
5806 link_len = strlen (link);
6dad7178
EZ		 5807
5808 target[0] = '\0';
5809 do {
5810
5811 /* Remove trailing slashes, as we want to resolve the last
5812 non-trivial part of the link name. */
eeccd06f
EZ		 5813 while (link_len > 3 && IS_DIRECTORY_SEP (link[link_len-1]))
5814 link[link_len--] = '\0';
6dad7178 5815
eeccd06f 5816 res = readlink (link, target, MAX_UTF8_PATH);
6dad7178
EZ		 5817 if (res > 0)
5818 {
5819 target[res] = '\0';
5820 if (!(IS_DEVICE_SEP (target[1])
25a20a3a 5821 || (IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]))))
6dad7178
EZ		 5822 {
5823 /* Target is relative. Append it to the directory part of
5824 the symlink, then copy the result back to target. */
5825 char *p = link + link_len;
5826
eeccd06f
EZ		 5827 while (p > link && !IS_ANY_SEP (p[-1]))
5828 p--;
6dad7178
EZ		 5829 strcpy (p, target);
5830 strcpy (target, link);
5831 }
5832 /* Resolve any "." and ".." to get a fully-qualified file name
5833 in link[] again. */
eeccd06f
EZ		 5834 if (w32_unicode_filenames)
5835 {
5836 filename_to_utf16 (target, target_w);
5837 link_len = GetFullPathNameW (target_w, MAX_PATH, link_w, NULL);
5838 if (link_len > 0)
5839 filename_from_utf16 (link_w, link);
5840 }
5841 else
5842 {
5843 filename_to_ansi (target, target_a);
5844 link_len = GetFullPathNameA (target_a, MAX_PATH, link_a, NULL);
5845 if (link_len > 0)
5846 filename_from_ansi (link_a, link);
5847 }
5848 link_len = strlen (link);
6dad7178
EZ		 5849 }
5850 } while (res > 0 && link_len > 0 && ++loop_count <= 100);
5851
5852 if (loop_count > 100)
5853 errno = ELOOP;
5854
5855 if (target[0] == '\0') /* not a single call to readlink succeeded */
5856 return (char *)file;
5857 return target;
5858}
5859
66447e07
EZ		 5860\f
5861/* Posix ACL emulation. */
5862
5863int
5864acl_valid (acl_t acl)
5865{
5866 return is_valid_security_descriptor ((PSECURITY_DESCRIPTOR)acl) ? 0 : -1;
5867}
5868
5869char *
5870acl_to_text (acl_t acl, ssize_t *size)
5871{
5872 LPTSTR str_acl;
5873 SECURITY_INFORMATION flags =
5874 OWNER_SECURITY_INFORMATION |
5875 GROUP_SECURITY_INFORMATION |
5876 DACL_SECURITY_INFORMATION;
5877 char *retval = NULL;
b764d018 5878 ULONG local_size;
66447e07
EZ		 5879 int e = errno;
5880
5881 errno = 0;
5882
5883 if (convert_sd_to_sddl ((PSECURITY_DESCRIPTOR)acl, SDDL_REVISION_1, flags, &str_acl, &local_size))
5884 {
5885 errno = e;
5886 /* We don't want to mix heaps, so we duplicate the string in our
5887 heap and free the one allocated by the API. */
5888 retval = xstrdup (str_acl);
5889 if (size)
5890 *size = local_size;
5891 LocalFree (str_acl);
5892 }
5893 else if (errno != ENOTSUP)
5894 errno = EINVAL;
5895
5896 return retval;
5897}
5898
5899acl_t
5900acl_from_text (const char *acl_str)
5901{
5902 PSECURITY_DESCRIPTOR psd, retval = NULL;
5903 ULONG sd_size;
5904 int e = errno;
5905
5906 errno = 0;
5907
5908 if (convert_sddl_to_sd (acl_str, SDDL_REVISION_1, &psd, &sd_size))
5909 {
5910 errno = e;
5911 retval = xmalloc (sd_size);
5912 memcpy (retval, psd, sd_size);
5913 LocalFree (psd);
5914 }
5915 else if (errno != ENOTSUP)
5916 errno = EINVAL;
5917
5918 return retval;
5919}
5920
5921int
5922acl_free (void *ptr)
5923{
5924 xfree (ptr);
5925 return 0;
5926}
5927
5928acl_t
5929acl_get_file (const char *fname, acl_type_t type)
5930{
5931 PSECURITY_DESCRIPTOR psd = NULL;
474d441e 5932 const char *filename;
66447e07
EZ		 5933
5934 if (type == ACL_TYPE_ACCESS)
5935 {
5936 DWORD sd_len, err;
5937 SECURITY_INFORMATION si =
5938 OWNER_SECURITY_INFORMATION |
5939 GROUP_SECURITY_INFORMATION |
5940 DACL_SECURITY_INFORMATION ;
5941 int e = errno;
5942
474d441e
EZ		 5943 filename = map_w32_filename (fname, NULL);
5944 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
5945 fname = chase_symlinks (filename);
5946 else
5947 fname = filename;
5948
66447e07
EZ		 5949 errno = 0;
5950 if (!get_file_security (fname, si, psd, 0, &sd_len)
5951 && errno != ENOTSUP)
5952 {
5953 err = GetLastError ();
5954 if (err == ERROR_INSUFFICIENT_BUFFER)
5955 {
5956 psd = xmalloc (sd_len);
5957 if (!get_file_security (fname, si, psd, sd_len, &sd_len))
5958 {
5959 xfree (psd);
5960 errno = EIO;
5961 psd = NULL;
5962 }
5963 }
5964 else if (err == ERROR_FILE_NOT_FOUND
66124e61
EZ		 5965 || err == ERROR_PATH_NOT_FOUND
5966 /* ERROR_INVALID_NAME is what we get if
5967 w32-unicode-filenames is nil and the file cannot
5968 be encoded in the current ANSI codepage. */
5969 || err == ERROR_INVALID_NAME)
66447e07
EZ		 5970 errno = ENOENT;
5971 else
5972 errno = EIO;
5973 }
5974 else if (!errno)
5975 errno = e;
5976 }
5977 else if (type != ACL_TYPE_DEFAULT)
5978 errno = EINVAL;
5979
5980 return psd;
5981}
5982
5983int
5984acl_set_file (const char *fname, acl_type_t type, acl_t acl)
5985{
5986 TOKEN_PRIVILEGES old1, old2;
5987 DWORD err;
66447e07
EZ		 5988 int st = 0, retval = -1;
5989 SECURITY_INFORMATION flags = 0;
0bbd0e0b 5990 PSID psidOwner, psidGroup;
66447e07
EZ		 5991 PACL pacl;
5992 BOOL dflt;
5993 BOOL dacl_present;
5994 int e;
474d441e 5995 const char *filename;
66447e07
EZ		 5996
5997 if (acl_valid (acl) != 0
5998 || (type != ACL_TYPE_DEFAULT && type != ACL_TYPE_ACCESS))
5999 {
6000 errno = EINVAL;
6001 return -1;
6002 }
6003
6004 if (type == ACL_TYPE_DEFAULT)
6005 {
6006 errno = ENOSYS;
6007 return -1;
6008 }
6009
474d441e
EZ		 6010 filename = map_w32_filename (fname, NULL);
6011 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
6012 fname = chase_symlinks (filename);
6013 else
6014 fname = filename;
6015
0bbd0e0b
FP		 6016 if (get_security_descriptor_owner ((PSECURITY_DESCRIPTOR)acl, &psidOwner,
6017 &dflt)
6018 && psidOwner)
66447e07 6019 flags |= OWNER_SECURITY_INFORMATION;
0bbd0e0b
FP		 6020 if (get_security_descriptor_group ((PSECURITY_DESCRIPTOR)acl, &psidGroup,
6021 &dflt)
6022 && psidGroup)
66447e07
EZ		 6023 flags |= GROUP_SECURITY_INFORMATION;
6024 if (get_security_descriptor_dacl ((PSECURITY_DESCRIPTOR)acl, &dacl_present,
6025 &pacl, &dflt)
6026 && dacl_present)
6027 flags |= DACL_SECURITY_INFORMATION;
6028 if (!flags)
6029 return 0;
6030
6031 /* According to KB-245153, setting the owner will succeed if either:
6032 (1) the caller is the user who will be the new owner, and has the
6033 SE_TAKE_OWNERSHIP privilege, or
6034 (2) the caller has the SE_RESTORE privilege, in which case she can
6035 set any valid user or group as the owner
6036
6037 We request below both SE_TAKE_OWNERSHIP and SE_RESTORE
6038 privileges, and disregard any failures in obtaining them. If
6039 these privileges cannot be obtained, and do not already exist in
6040 the calling thread's security token, this function could fail
6041 with EPERM. */
6042 if (enable_privilege (SE_TAKE_OWNERSHIP_NAME, TRUE, &old1))
6043 st++;
6044 if (enable_privilege (SE_RESTORE_NAME, TRUE, &old2))
6045 st++;
6046
6047 e = errno;
6048 errno = 0;
0bbd0e0b
FP		 6049 /* SetFileSecurity is deprecated by MS, and sometimes fails when
6050 DACL inheritance is involved, but it seems to preserve ownership
535f0fbd 6051 better than SetNamedSecurityInfo, which is important e.g., in
0bbd0e0b 6052 copy-file. */
66124e61 6053 if (!set_file_security (fname, flags, (PSECURITY_DESCRIPTOR)acl))
474d441e 6054 {
84e5ed96 6055 err = GetLastError ();
40ff07a5 6056
0bbd0e0b
FP		 6057 if (errno != ENOTSUP)
6058 err = set_named_security_info (fname, SE_FILE_OBJECT, flags,
6059 psidOwner, psidGroup, pacl, NULL);
6060 }
6061 else
6062 err = ERROR_SUCCESS;
6063 if (err != ERROR_SUCCESS)
6064 {
84e5ed96
EZ		 6065 if (errno == ENOTSUP)
6066 ;
6067 else if (err == ERROR_INVALID_OWNER
6068 || err == ERROR_NOT_ALL_ASSIGNED
6069 || err == ERROR_ACCESS_DENIED)
40ff07a5 6070 {
84e5ed96
EZ		 6071 /* Maybe the requested ACL and the one the file already has
6072 are identical, in which case we can silently ignore the
6073 failure. (And no, Windows doesn't.) */
6074 acl_t current_acl = acl_get_file (fname, ACL_TYPE_ACCESS);
40ff07a5 6075
84e5ed96
EZ		 6076 errno = EPERM;
6077 if (current_acl)
40ff07a5 6078 {
84e5ed96
EZ		 6079 char *acl_from = acl_to_text (current_acl, NULL);
6080 char *acl_to = acl_to_text (acl, NULL);
6081
6082 if (acl_from && acl_to && xstrcasecmp (acl_from, acl_to) == 0)
6083 {
6084 retval = 0;
6085 errno = e;
6086 }
6087 if (acl_from)
6088 acl_free (acl_from);
6089 if (acl_to)
6090 acl_free (acl_to);
6091 acl_free (current_acl);
40ff07a5 6092 }
40ff07a5 6093 }
66124e61
EZ		 6094 else if (err == ERROR_FILE_NOT_FOUND
6095 || err == ERROR_PATH_NOT_FOUND
6096 /* ERROR_INVALID_NAME is what we get if
6097 w32-unicode-filenames is nil and the file cannot be
6098 encoded in the current ANSI codepage. */
6099 || err == ERROR_INVALID_NAME)
84e5ed96
EZ		 6100 errno = ENOENT;
6101 else
6102 errno = EACCES;
6103 }
6104 else
6105 {
6106 retval = 0;
6107 errno = e;
6108 }
6109
6110 if (st)
6111 {
6112 if (st >= 2)
6113 restore_privilege (&old2);
6114 restore_privilege (&old1);
6115 revert_to_self ();
40ff07a5 6116 }
66447e07
EZ		 6117
6118 return retval;
6119}
6120
6121\f
6dad7178
EZ		 6122/* MS-Windows version of careadlinkat (cf. ../lib/careadlinkat.c). We
6123 have a fixed max size for file names, so we don't need the kind of
6124 alloc/malloc/realloc dance the gnulib version does. We also don't
6125 support FD-relative symlinks. */
973f782d
EZ		 6126char *
6127careadlinkat (int fd, char const *filename,
6128 char *buffer, size_t buffer_size,
6129 struct allocator const *alloc,
6130 ssize_t (*preadlinkat) (int, char const *, char *, size_t))
6131{
eeccd06f 6132 char linkname[MAX_UTF8_PATH];
6dad7178
EZ		 6133 ssize_t link_size;
6134
6dad7178
EZ		 6135 link_size = preadlinkat (fd, filename, linkname, sizeof(linkname));
6136
6137 if (link_size > 0)
6138 {
6139 char *retval = buffer;
6140
6141 linkname[link_size++] = '\0';
6142 if (link_size > buffer_size)
6143 retval = (char *)(alloc ? alloc->allocate : xmalloc) (link_size);
6144 if (retval)
6145 memcpy (retval, linkname, link_size);
6146
6147 return retval;
6148 }
973f782d
EZ		 6149 return NULL;
6150}
6151
ec4440cf
EZ		 6152int
6153w32_copy_file (const char *from, const char *to,
6154 int keep_time, int preserve_ownership, int copy_acls)
6155{
6156 acl_t acl = NULL;
6157 BOOL copy_result;
6158 wchar_t from_w[MAX_PATH], to_w[MAX_PATH];
6159 char from_a[MAX_PATH], to_a[MAX_PATH];
6160
6161 /* We ignore preserve_ownership for now. */
6162 preserve_ownership = preserve_ownership;
6163
6164 if (copy_acls)
6165 {
6166 acl = acl_get_file (from, ACL_TYPE_ACCESS);
6167 if (acl == NULL && acl_errno_valid (errno))
6168 return -2;
6169 }
6170 if (w32_unicode_filenames)
6171 {
6172 filename_to_utf16 (from, from_w);
6173 filename_to_utf16 (to, to_w);
6174 copy_result = CopyFileW (from_w, to_w, FALSE);
6175 }
6176 else
6177 {
6178 filename_to_ansi (from, from_a);
6179 filename_to_ansi (to, to_a);
6180 copy_result = CopyFileA (from_a, to_a, FALSE);
6181 }
6182 if (!copy_result)
6183 {
6184 /* CopyFile doesn't set errno when it fails. By far the most
6185 "popular" reason is that the target is read-only. */
6186 DWORD err = GetLastError ();
6187
6188 switch (err)
6189 {
6190 case ERROR_FILE_NOT_FOUND:
6191 errno = ENOENT;
6192 break;
6193 case ERROR_ACCESS_DENIED:
6194 errno = EACCES;
6195 break;
6196 case ERROR_ENCRYPTION_FAILED:
6197 errno = EIO;
6198 break;
6199 default:
6200 errno = EPERM;
6201 break;
6202 }
6203
6204 if (acl)
6205 acl_free (acl);
6206 return -1;
6207 }
6208 /* CopyFile retains the timestamp by default. However, see
6209 "Community Additions" for CopyFile: it sounds like that is not
6210 entirely true. Testing on Windows XP confirms that modified time
6211 is copied, but creation and last-access times are not.
6212 FIXME? */
6213 else if (!keep_time)
6214 {
6215 struct timespec now;
6216 DWORD attributes;
6217
6218 if (w32_unicode_filenames)
6219 {
6220 /* Ensure file is writable while its times are set. */
6221 attributes = GetFileAttributesW (to_w);
6222 SetFileAttributesW (to_w, attributes & ~FILE_ATTRIBUTE_READONLY);
6223 now = current_timespec ();
6224 if (set_file_times (-1, to, now, now))
6225 {
6226 /* Restore original attributes. */
6227 SetFileAttributesW (to_w, attributes);
6228 if (acl)
6229 acl_free (acl);
6230 return -3;
6231 }
6232 /* Restore original attributes. */
6233 SetFileAttributesW (to_w, attributes);
6234 }
6235 else
6236 {
6237 attributes = GetFileAttributesA (to_a);
6238 SetFileAttributesA (to_a, attributes & ~FILE_ATTRIBUTE_READONLY);
6239 now = current_timespec ();
6240 if (set_file_times (-1, to, now, now))
6241 {
6242 SetFileAttributesA (to_a, attributes);
6243 if (acl)
6244 acl_free (acl);
6245 return -3;
6246 }
6247 SetFileAttributesA (to_a, attributes);
6248 }
6249 }
6250 if (acl != NULL)
6251 {
6252 bool fail =
6253 acl_set_file (to, ACL_TYPE_ACCESS, acl) != 0;
6254 acl_free (acl);
6255 if (fail && acl_errno_valid (errno))
6256 return -4;
6257 }
6258
6259 return 0;
6260}
6261
0f7bb05d 6262\f
7c80d5ec
EZ		 6263/* Support for browsing other processes and their attributes. See
6264 process.c for the Lisp bindings. */
6265
6266/* Helper wrapper functions. */
6267
bedf4aab
JB		 6268static HANDLE WINAPI
6269create_toolhelp32_snapshot (DWORD Flags, DWORD Ignored)
7c80d5ec
EZ		 6270{
6271 static CreateToolhelp32Snapshot_Proc s_pfn_Create_Toolhelp32_Snapshot = NULL;
6272
6273 if (g_b_init_create_toolhelp32_snapshot == 0)
6274 {
6275 g_b_init_create_toolhelp32_snapshot = 1;
6276 s_pfn_Create_Toolhelp32_Snapshot = (CreateToolhelp32Snapshot_Proc)
6277 GetProcAddress (GetModuleHandle ("kernel32.dll"),
6278 "CreateToolhelp32Snapshot");
6279 }
6280 if (s_pfn_Create_Toolhelp32_Snapshot == NULL)
6281 {
6282 return INVALID_HANDLE_VALUE;
6283 }
6284 return (s_pfn_Create_Toolhelp32_Snapshot (Flags, Ignored));
6285}
6286
bedf4aab
JB		 6287static BOOL WINAPI
6288process32_first (HANDLE hSnapshot, LPPROCESSENTRY32 lppe)
7c80d5ec
EZ		 6289{
6290 static Process32First_Proc s_pfn_Process32_First = NULL;
6291
6292 if (g_b_init_process32_first == 0)
6293 {
6294 g_b_init_process32_first = 1;
6295 s_pfn_Process32_First = (Process32First_Proc)
6296 GetProcAddress (GetModuleHandle ("kernel32.dll"),
6297 "Process32First");
6298 }
6299 if (s_pfn_Process32_First == NULL)
6300 {
6301 return FALSE;
6302 }
6303 return (s_pfn_Process32_First (hSnapshot, lppe));
6304}
6305
bedf4aab
JB		 6306static BOOL WINAPI
6307process32_next (HANDLE hSnapshot, LPPROCESSENTRY32 lppe)
7c80d5ec
EZ		 6308{
6309 static Process32Next_Proc s_pfn_Process32_Next = NULL;
6310
6311 if (g_b_init_process32_next == 0)
6312 {
6313 g_b_init_process32_next = 1;
6314 s_pfn_Process32_Next = (Process32Next_Proc)
6315 GetProcAddress (GetModuleHandle ("kernel32.dll"),
6316 "Process32Next");
6317 }
6318 if (s_pfn_Process32_Next == NULL)
6319 {
6320 return FALSE;
6321 }
6322 return (s_pfn_Process32_Next (hSnapshot, lppe));
6323}
6324
bedf4aab
JB		 6325static BOOL WINAPI
6326open_thread_token (HANDLE ThreadHandle,
6327 DWORD DesiredAccess,
6328 BOOL OpenAsSelf,
6329 PHANDLE TokenHandle)
7c80d5ec
EZ		 6330{
6331 static OpenThreadToken_Proc s_pfn_Open_Thread_Token = NULL;
6332 HMODULE hm_advapi32 = NULL;
6333 if (is_windows_9x () == TRUE)
6334 {
6335 SetLastError (ERROR_NOT_SUPPORTED);
6336 return FALSE;
6337 }
6338 if (g_b_init_open_thread_token == 0)
6339 {
6340 g_b_init_open_thread_token = 1;
6341 hm_advapi32 = LoadLibrary ("Advapi32.dll");
6342 s_pfn_Open_Thread_Token =
6343 (OpenThreadToken_Proc) GetProcAddress (hm_advapi32, "OpenThreadToken");
6344 }
6345 if (s_pfn_Open_Thread_Token == NULL)
6346 {
6347 SetLastError (ERROR_NOT_SUPPORTED);
6348 return FALSE;
6349 }
6350 return (
6351 s_pfn_Open_Thread_Token (
6352 ThreadHandle,
6353 DesiredAccess,
6354 OpenAsSelf,
6355 TokenHandle)
6356 );
6357}
6358
bedf4aab
JB		 6359static BOOL WINAPI
6360impersonate_self (SECURITY_IMPERSONATION_LEVEL ImpersonationLevel)
7c80d5ec
EZ		 6361{
6362 static ImpersonateSelf_Proc s_pfn_Impersonate_Self = NULL;
6363 HMODULE hm_advapi32 = NULL;
6364 if (is_windows_9x () == TRUE)
6365 {
6366 return FALSE;
6367 }
6368 if (g_b_init_impersonate_self == 0)
6369 {
6370 g_b_init_impersonate_self = 1;
6371 hm_advapi32 = LoadLibrary ("Advapi32.dll");
6372 s_pfn_Impersonate_Self =
6373 (ImpersonateSelf_Proc) GetProcAddress (hm_advapi32, "ImpersonateSelf");
6374 }
6375 if (s_pfn_Impersonate_Self == NULL)
6376 {
6377 return FALSE;
6378 }
6379 return s_pfn_Impersonate_Self (ImpersonationLevel);
6380}
6381
bedf4aab
JB		 6382static BOOL WINAPI
6383revert_to_self (void)
7c80d5ec
EZ		 6384{
6385 static RevertToSelf_Proc s_pfn_Revert_To_Self = NULL;
6386 HMODULE hm_advapi32 = NULL;
6387 if (is_windows_9x () == TRUE)
6388 {
6389 return FALSE;
6390 }
6391 if (g_b_init_revert_to_self == 0)
6392 {
6393 g_b_init_revert_to_self = 1;
6394 hm_advapi32 = LoadLibrary ("Advapi32.dll");
6395 s_pfn_Revert_To_Self =
6396 (RevertToSelf_Proc) GetProcAddress (hm_advapi32, "RevertToSelf");
6397 }
6398 if (s_pfn_Revert_To_Self == NULL)
6399 {
6400 return FALSE;
6401 }
6402 return s_pfn_Revert_To_Self ();
6403}
6404
bedf4aab
JB		 6405static BOOL WINAPI
6406get_process_memory_info (HANDLE h_proc,
6407 PPROCESS_MEMORY_COUNTERS mem_counters,
6408 DWORD bufsize)
7c80d5ec
EZ		 6409{
6410 static GetProcessMemoryInfo_Proc s_pfn_Get_Process_Memory_Info = NULL;
6411 HMODULE hm_psapi = NULL;
6412 if (is_windows_9x () == TRUE)
6413 {
6414 return FALSE;
6415 }
6416 if (g_b_init_get_process_memory_info == 0)
6417 {
6418 g_b_init_get_process_memory_info = 1;
6419 hm_psapi = LoadLibrary ("Psapi.dll");
6420 if (hm_psapi)
6421 s_pfn_Get_Process_Memory_Info = (GetProcessMemoryInfo_Proc)
6422 GetProcAddress (hm_psapi, "GetProcessMemoryInfo");
6423 }
6424 if (s_pfn_Get_Process_Memory_Info == NULL)
6425 {
6426 return FALSE;
6427 }
6428 return s_pfn_Get_Process_Memory_Info (h_proc, mem_counters, bufsize);
6429}
6430
bedf4aab
JB		 6431static BOOL WINAPI
6432get_process_working_set_size (HANDLE h_proc,
cb576b5c
FP		 6433 PSIZE_T minrss,
6434 PSIZE_T maxrss)
7c80d5ec
EZ		 6435{
6436 static GetProcessWorkingSetSize_Proc
6437 s_pfn_Get_Process_Working_Set_Size = NULL;
6438
6439 if (is_windows_9x () == TRUE)
6440 {
6441 return FALSE;
6442 }
6443 if (g_b_init_get_process_working_set_size == 0)
6444 {
6445 g_b_init_get_process_working_set_size = 1;
6446 s_pfn_Get_Process_Working_Set_Size = (GetProcessWorkingSetSize_Proc)
6447 GetProcAddress (GetModuleHandle ("kernel32.dll"),
6448 "GetProcessWorkingSetSize");
6449 }
6450 if (s_pfn_Get_Process_Working_Set_Size == NULL)
6451 {
6452 return FALSE;
6453 }
6454 return s_pfn_Get_Process_Working_Set_Size (h_proc, minrss, maxrss);
6455}
6456
bedf4aab
JB		 6457static BOOL WINAPI
6458global_memory_status (MEMORYSTATUS *buf)
7c80d5ec
EZ		 6459{
6460 static GlobalMemoryStatus_Proc s_pfn_Global_Memory_Status = NULL;
6461
6462 if (is_windows_9x () == TRUE)
6463 {
6464 return FALSE;
6465 }
6466 if (g_b_init_global_memory_status == 0)
6467 {
6468 g_b_init_global_memory_status = 1;
6469 s_pfn_Global_Memory_Status = (GlobalMemoryStatus_Proc)
6470 GetProcAddress (GetModuleHandle ("kernel32.dll"),
6471 "GlobalMemoryStatus");
6472 }
6473 if (s_pfn_Global_Memory_Status == NULL)
6474 {
6475 return FALSE;
6476 }
6477 return s_pfn_Global_Memory_Status (buf);
6478}
6479
bedf4aab
JB		 6480static BOOL WINAPI
6481global_memory_status_ex (MEMORY_STATUS_EX *buf)
7c80d5ec
EZ		 6482{
6483 static GlobalMemoryStatusEx_Proc s_pfn_Global_Memory_Status_Ex = NULL;
6484
6485 if (is_windows_9x () == TRUE)
6486 {
6487 return FALSE;
6488 }
6489 if (g_b_init_global_memory_status_ex == 0)
6490 {
6491 g_b_init_global_memory_status_ex = 1;
6492 s_pfn_Global_Memory_Status_Ex = (GlobalMemoryStatusEx_Proc)
6493 GetProcAddress (GetModuleHandle ("kernel32.dll"),
6494 "GlobalMemoryStatusEx");
6495 }
6496 if (s_pfn_Global_Memory_Status_Ex == NULL)
6497 {
6498 return FALSE;
6499 }
6500 return s_pfn_Global_Memory_Status_Ex (buf);
6501}
6502
6503Lisp_Object
b56ceb92 6504list_system_processes (void)
7c80d5ec
EZ		 6505{
6506 struct gcpro gcpro1;
6507 Lisp_Object proclist = Qnil;
6508 HANDLE h_snapshot;
6509
6510 h_snapshot = create_toolhelp32_snapshot (TH32CS_SNAPPROCESS, 0);
6511
6512 if (h_snapshot != INVALID_HANDLE_VALUE)
6513 {
6514 PROCESSENTRY32 proc_entry;
6515 DWORD proc_id;
6516 BOOL res;
6517
6518 GCPRO1 (proclist);
6519
6520 proc_entry.dwSize = sizeof (PROCESSENTRY32);
6521 for (res = process32_first (h_snapshot, &proc_entry); res;
6522 res = process32_next (h_snapshot, &proc_entry))
6523 {
6524 proc_id = proc_entry.th32ProcessID;
6525 proclist = Fcons (make_fixnum_or_float (proc_id), proclist);
6526 }
6527
6528 CloseHandle (h_snapshot);
6529 UNGCPRO;
6530 proclist = Fnreverse (proclist);
6531 }
6532
6533 return proclist;
6534}
6535
6536static int
6537enable_privilege (LPCTSTR priv_name, BOOL enable_p, TOKEN_PRIVILEGES *old_priv)
6538{
6539 TOKEN_PRIVILEGES priv;
6540 DWORD priv_size = sizeof (priv);
6541 DWORD opriv_size = sizeof (*old_priv);
6542 HANDLE h_token = NULL;
6543 HANDLE h_thread = GetCurrentThread ();
6544 int ret_val = 0;
6545 BOOL res;
6546
6547 res = open_thread_token (h_thread,
6548 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
6549 FALSE, &h_token);
6550 if (!res && GetLastError () == ERROR_NO_TOKEN)
6551 {
6552 if (impersonate_self (SecurityImpersonation))
6553 res = open_thread_token (h_thread,
6554 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
6555 FALSE, &h_token);
6556 }
6557 if (res)
6558 {
6559 priv.PrivilegeCount = 1;
6560 priv.Privileges[0].Attributes = enable_p ? SE_PRIVILEGE_ENABLED : 0;
6561 LookupPrivilegeValue (NULL, priv_name, &priv.Privileges[0].Luid);
6562 if (AdjustTokenPrivileges (h_token, FALSE, &priv, priv_size,
6563 old_priv, &opriv_size)
6564 && GetLastError () != ERROR_NOT_ALL_ASSIGNED)
6565 ret_val = 1;
6566 }
6567 if (h_token)
6568 CloseHandle (h_token);
6569
6570 return ret_val;
6571}
6572
6573static int
6574restore_privilege (TOKEN_PRIVILEGES *priv)
6575{
6576 DWORD priv_size = sizeof (*priv);
6577 HANDLE h_token = NULL;
6578 int ret_val = 0;
6579
6580 if (open_thread_token (GetCurrentThread (),
6581 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
6582 FALSE, &h_token))
6583 {
6584 if (AdjustTokenPrivileges (h_token, FALSE, priv, priv_size, NULL, NULL)
6585 && GetLastError () != ERROR_NOT_ALL_ASSIGNED)
6586 ret_val = 1;
6587 }
6588 if (h_token)
6589 CloseHandle (h_token);
6590
6591 return ret_val;
6592}
6593
ca300656 6594static Lisp_Object
d35af63c 6595ltime (ULONGLONG time_100ns)
7c80d5ec 6596{
d35af63c
PE		 6597 ULONGLONG time_sec = time_100ns / 10000000;
6598 int subsec = time_100ns % 10000000;
3de717bd
DA		 6599 return list4i (time_sec >> 16, time_sec & 0xffff,
6600 subsec / 10, subsec % 10 * 100000);
7c80d5ec
EZ		 6601}
6602
d35af63c 6603#define U64_TO_LISP_TIME(time) ltime (time)
5da9424d 6604
7c80d5ec 6605static int
b56ceb92
JB		 6606process_times (HANDLE h_proc, Lisp_Object *ctime, Lisp_Object *etime,
6607 Lisp_Object *stime, Lisp_Object *utime, Lisp_Object *ttime,
6608 double *pcpu)
7c80d5ec
EZ		 6609{
6610 FILETIME ft_creation, ft_exit, ft_kernel, ft_user, ft_current;
5da9424d 6611 ULONGLONG tem1, tem2, tem3, tem;
7c80d5ec
EZ		 6612
6613 if (!h_proc
6614 || !get_process_times_fn
ed3751c8
JB		 6615 || !(*get_process_times_fn) (h_proc, &ft_creation, &ft_exit,
6616 &ft_kernel, &ft_user))
7c80d5ec
EZ		 6617 return 0;
6618
6619 GetSystemTimeAsFileTime (&ft_current);
6620
5da9424d 6621 FILETIME_TO_U64 (tem1, ft_kernel);
5da9424d
JB		 6622 *stime = U64_TO_LISP_TIME (tem1);
6623
6624 FILETIME_TO_U64 (tem2, ft_user);
5da9424d
JB		 6625 *utime = U64_TO_LISP_TIME (tem2);
6626
6627 tem3 = tem1 + tem2;
6628 *ttime = U64_TO_LISP_TIME (tem3);
6629
6630 FILETIME_TO_U64 (tem, ft_creation);
3af03101
EZ		 6631 /* Process no 4 (System) returns zero creation time. */
6632 if (tem)
d35af63c 6633 tem -= utc_base;
5da9424d
JB		 6634 *ctime = U64_TO_LISP_TIME (tem);
6635
3af03101 6636 if (tem)
5da9424d
JB		 6637 {
6638 FILETIME_TO_U64 (tem3, ft_current);
d35af63c 6639 tem = (tem3 - utc_base) - tem;
5da9424d
JB		 6640 }
6641 *etime = U64_TO_LISP_TIME (tem);
7c80d5ec 6642
3af03101
EZ		 6643 if (tem)
6644 {
6645 *pcpu = 100.0 * (tem1 + tem2) / tem;
6646 if (*pcpu > 100)
6647 *pcpu = 100.0;
6648 }
6649 else
6650 *pcpu = 0;
6651
6652 return 1;
7c80d5ec
EZ		 6653}
6654
6655Lisp_Object
b56ceb92 6656system_process_attributes (Lisp_Object pid)
7c80d5ec
EZ		 6657{
6658 struct gcpro gcpro1, gcpro2, gcpro3;
6659 Lisp_Object attrs = Qnil;
6660 Lisp_Object cmd_str, decoded_cmd, tem;
6661 HANDLE h_snapshot, h_proc;
6662 DWORD proc_id;
754a2d13 6663 int found_proc = 0;
7c80d5ec 6664 char uname[UNLEN+1], gname[GNLEN+1], domain[1025];
32cef06e 6665 DWORD ulength = sizeof (uname), dlength = sizeof (domain), needed;
7c80d5ec
EZ		 6666 DWORD glength = sizeof (gname);
6667 HANDLE token = NULL;
6668 SID_NAME_USE user_type;
32cef06e
EZ		 6669 unsigned char *buf = NULL;
6670 DWORD blen = 0;
7c80d5ec
EZ		 6671 TOKEN_USER user_token;
6672 TOKEN_PRIMARY_GROUP group_token;
22749e9a
EZ		 6673 unsigned euid;
6674 unsigned egid;
7c80d5ec
EZ		 6675 PROCESS_MEMORY_COUNTERS mem;
6676 PROCESS_MEMORY_COUNTERS_EX mem_ex;
cb576b5c 6677 SIZE_T minrss, maxrss;
7c80d5ec 6678 MEMORYSTATUS memst;
b8526f6e 6679 MEMORY_STATUS_EX memstex;
7c80d5ec 6680 double totphys = 0.0;
031da700 6681 Lisp_Object ctime, stime, utime, etime, ttime;
7c80d5ec 6682 double pcpu;
32cef06e 6683 BOOL result = FALSE;
7c80d5ec
EZ		 6684
6685 CHECK_NUMBER_OR_FLOAT (pid);
6686 proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid);
6687
6688 h_snapshot = create_toolhelp32_snapshot (TH32CS_SNAPPROCESS, 0);
6689
6690 GCPRO3 (attrs, decoded_cmd, tem);
6691
6692 if (h_snapshot != INVALID_HANDLE_VALUE)
6693 {
6694 PROCESSENTRY32 pe;
6695 BOOL res;
6696
6697 pe.dwSize = sizeof (PROCESSENTRY32);
6698 for (res = process32_first (h_snapshot, &pe); res;
6699 res = process32_next (h_snapshot, &pe))
6700 {
6701 if (proc_id == pe.th32ProcessID)
6702 {
6703 if (proc_id == 0)
6704 decoded_cmd = build_string ("Idle");
6705 else
6706 {
6707 /* Decode the command name from locale-specific
6708 encoding. */
309f24d1
DA		 6709 cmd_str = build_unibyte_string (pe.szExeFile);
6710
7c80d5ec
EZ		 6711 decoded_cmd =
6712 code_convert_string_norecord (cmd_str,
6713 Vlocale_coding_system, 0);
6714 }
6715 attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
6716 attrs = Fcons (Fcons (Qppid,
6717 make_fixnum_or_float (pe.th32ParentProcessID)),
6718 attrs);
6719 attrs = Fcons (Fcons (Qpri, make_number (pe.pcPriClassBase)),
6720 attrs);
6721 attrs = Fcons (Fcons (Qthcount,
6722 make_fixnum_or_float (pe.cntThreads)),
6723 attrs);
754a2d13 6724 found_proc = 1;
7c80d5ec
EZ		 6725 break;
6726 }
6727 }
6728
6729 CloseHandle (h_snapshot);
6730 }
6731
754a2d13
EZ		 6732 if (!found_proc)
6733 {
6734 UNGCPRO;
6735 return Qnil;
6736 }
6737
7c80d5ec
EZ		 6738 h_proc = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
6739 FALSE, proc_id);
6740 /* If we were denied a handle to the process, try again after
6741 enabling the SeDebugPrivilege in our process. */
6742 if (!h_proc)
6743 {
6744 TOKEN_PRIVILEGES priv_current;
6745
6746 if (enable_privilege (SE_DEBUG_NAME, TRUE, &priv_current))
6747 {
6748 h_proc = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
6749 FALSE, proc_id);
6750 restore_privilege (&priv_current);
6751 revert_to_self ();
6752 }
6753 }
32cef06e 6754 if (h_proc)
7c80d5ec 6755 {
32cef06e
EZ		 6756 result = open_process_token (h_proc, TOKEN_QUERY, &token);
6757 if (result)
f8b35b24 6758 {
32cef06e
EZ		 6759 result = get_token_information (token, TokenUser, NULL, 0, &blen);
6760 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
6761 {
6762 buf = xmalloc (blen);
6763 result = get_token_information (token, TokenUser,
6764 (LPVOID)buf, blen, &needed);
6765 if (result)
6766 {
6767 memcpy (&user_token, buf, sizeof (user_token));
6768 if (!w32_cached_id (user_token.User.Sid, &euid, uname))
6769 {
6770 euid = get_rid (user_token.User.Sid);
6771 result = lookup_account_sid (NULL, user_token.User.Sid,
6772 uname, &ulength,
6773 domain, &dlength,
6774 &user_type);
6775 if (result)
6776 w32_add_to_cache (user_token.User.Sid, euid, uname);
6777 else
6778 {
6779 strcpy (uname, "unknown");
6780 result = TRUE;
6781 }
6782 }
6783 ulength = strlen (uname);
6784 }
6785 }
7c80d5ec 6786 }
32cef06e 6787 if (result)
7c80d5ec 6788 {
32cef06e
EZ		 6789 /* Determine a reasonable euid and gid values. */
6790 if (xstrcasecmp ("administrator", uname) == 0)
7c80d5ec 6791 {
32cef06e
EZ		 6792 euid = 500; /* well-known Administrator uid */
6793 egid = 513; /* well-known None gid */
6794 }
6795 else
6796 {
6797 /* Get group id and name. */
6798 result = get_token_information (token, TokenPrimaryGroup,
6799 (LPVOID)buf, blen, &needed);
6800 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
f8b35b24 6801 {
32cef06e
EZ		 6802 buf = xrealloc (buf, blen = needed);
6803 result = get_token_information (token, TokenPrimaryGroup,
6804 (LPVOID)buf, blen, &needed);
6805 }
6806 if (result)
6807 {
6808 memcpy (&group_token, buf, sizeof (group_token));
6809 if (!w32_cached_id (group_token.PrimaryGroup, &egid, gname))
6810 {
6811 egid = get_rid (group_token.PrimaryGroup);
6812 dlength = sizeof (domain);
6813 result =
6814 lookup_account_sid (NULL, group_token.PrimaryGroup,
6815 gname, &glength, NULL, &dlength,
6816 &user_type);
6817 if (result)
6818 w32_add_to_cache (group_token.PrimaryGroup,
6819 egid, gname);
6820 else
6821 {
6822 strcpy (gname, "None");
6823 result = TRUE;
6824 }
6825 }
6826 glength = strlen (gname);
f8b35b24 6827 }
7c80d5ec 6828 }
7c80d5ec 6829 }
5f445726 6830 xfree (buf);
7c80d5ec 6831 }
32cef06e 6832 if (!result)
7c80d5ec 6833 {
32cef06e
EZ		 6834 if (!is_windows_9x ())
6835 {
6836 /* We couldn't open the process token, presumably because of
6837 insufficient access rights. Assume this process is run
6838 by the system. */
6839 strcpy (uname, "SYSTEM");
6840 strcpy (gname, "None");
6841 euid = 18; /* SYSTEM */
6842 egid = 513; /* None */
6843 glength = strlen (gname);
6844 ulength = strlen (uname);
6845 }
6846 /* If we are running under Windows 9X, where security calls are
6847 not supported, we assume all processes are run by the current
6848 user. */
6849 else if (GetUserName (uname, &ulength))
6850 {
6851 if (xstrcasecmp ("administrator", uname) == 0)
6852 euid = 0;
6853 else
6854 euid = 123;
6855 egid = euid;
6856 strcpy (gname, "None");
6857 glength = strlen (gname);
6858 ulength = strlen (uname);
6859 }
7c80d5ec 6860 else
32cef06e
EZ		 6861 {
6862 euid = 123;
6863 egid = 123;
6864 strcpy (uname, "administrator");
6865 ulength = strlen (uname);
6866 strcpy (gname, "None");
6867 glength = strlen (gname);
6868 }
6869 if (token)
6870 CloseHandle (token);
7c80d5ec 6871 }
7c80d5ec
EZ		 6872
6873 attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (euid)), attrs);
6874 tem = make_unibyte_string (uname, ulength);
6875 attrs = Fcons (Fcons (Quser,
6876 code_convert_string_norecord (tem, Vlocale_coding_system, 0)),
6877 attrs);
6878 attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (egid)), attrs);
6879 tem = make_unibyte_string (gname, glength);
6880 attrs = Fcons (Fcons (Qgroup,
6881 code_convert_string_norecord (tem, Vlocale_coding_system, 0)),
6882 attrs);
6883
6884 if (global_memory_status_ex (&memstex))
235661f6 6885#if __GNUC__ || (defined (_MSC_VER) && _MSC_VER >= 1300)
7c80d5ec 6886 totphys = memstex.ullTotalPhys / 1024.0;
235661f6
EZ		 6887#else
6888 /* Visual Studio 6 cannot convert an unsigned __int64 type to
6889 double, so we need to do this for it... */
6890 {
6891 DWORD tot_hi = memstex.ullTotalPhys >> 32;
6892 DWORD tot_md = (memstex.ullTotalPhys & 0x00000000ffffffff) >> 10;
6893 DWORD tot_lo = memstex.ullTotalPhys % 1024;
6894
6895 totphys = tot_hi * 4194304.0 + tot_md + tot_lo / 1024.0;
6896 }
6897#endif /* __GNUC__ || _MSC_VER >= 1300 */
7c80d5ec
EZ		 6898 else if (global_memory_status (&memst))
6899 totphys = memst.dwTotalPhys / 1024.0;
6900
6901 if (h_proc
6902 && get_process_memory_info (h_proc, (PROCESS_MEMORY_COUNTERS *)&mem_ex,
6903 sizeof (mem_ex)))
6904 {
cb576b5c 6905 SIZE_T rss = mem_ex.WorkingSetSize / 1024;
7c80d5ec
EZ		 6906
6907 attrs = Fcons (Fcons (Qmajflt,
6908 make_fixnum_or_float (mem_ex.PageFaultCount)),
6909 attrs);
6910 attrs = Fcons (Fcons (Qvsize,
6911 make_fixnum_or_float (mem_ex.PrivateUsage / 1024)),
6912 attrs);
6913 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (rss)), attrs);
6914 if (totphys)
6915 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
6916 }
6917 else if (h_proc
6918 && get_process_memory_info (h_proc, &mem, sizeof (mem)))
6919 {
cb576b5c 6920 SIZE_T rss = mem_ex.WorkingSetSize / 1024;
7c80d5ec
EZ		 6921
6922 attrs = Fcons (Fcons (Qmajflt,
6923 make_fixnum_or_float (mem.PageFaultCount)),
6924 attrs);
6925 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (rss)), attrs);
6926 if (totphys)
6927 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
6928 }
6929 else if (h_proc
6930 && get_process_working_set_size (h_proc, &minrss, &maxrss))
6931 {
6932 DWORD rss = maxrss / 1024;
6933
6934 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (maxrss / 1024)), attrs);
6935 if (totphys)
6936 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
6937 }
6938
031da700 6939 if (process_times (h_proc, &ctime, &etime, &stime, &utime, &ttime, &pcpu))
7c80d5ec
EZ		 6940 {
6941 attrs = Fcons (Fcons (Qutime, utime), attrs);
6942 attrs = Fcons (Fcons (Qstime, stime), attrs);
031da700 6943 attrs = Fcons (Fcons (Qtime, ttime), attrs);
7c80d5ec
EZ		 6944 attrs = Fcons (Fcons (Qstart, ctime), attrs);
6945 attrs = Fcons (Fcons (Qetime, etime), attrs);
6946 attrs = Fcons (Fcons (Qpcpu, make_float (pcpu)), attrs);
6947 }
6948
6949 /* FIXME: Retrieve command line by walking the PEB of the process. */
6950
6951 if (h_proc)
6952 CloseHandle (h_proc);
6953 UNGCPRO;
6954 return attrs;
6955}
6956
6957\f
480b0c5b
GV		 6958/* Wrappers for winsock functions to map between our file descriptors
6959 and winsock's handles; also set h_errno for convenience.
6960
6961 To allow Emacs to run on systems which don't have winsock support
6962 installed, we dynamically link to winsock on startup if present, and
6963 otherwise provide the minimum necessary functionality
6964 (eg. gethostname). */
6965
6966/* function pointers for relevant socket functions */
6967int (PASCAL *pfn_WSAStartup) (WORD wVersionRequired, LPWSADATA lpWSAData);
6968void (PASCAL *pfn_WSASetLastError) (int iError);
6969int (PASCAL *pfn_WSAGetLastError) (void);
26fb7bc4 6970int (PASCAL *pfn_WSAEventSelect) (SOCKET s, HANDLE hEventObject, long lNetworkEvents);
64570b36
KS		 6971HANDLE (PASCAL *pfn_WSACreateEvent) (void);
6972int (PASCAL *pfn_WSACloseEvent) (HANDLE hEvent);
480b0c5b
GV		 6973int (PASCAL *pfn_socket) (int af, int type, int protocol);
6974int (PASCAL *pfn_bind) (SOCKET s, const struct sockaddr *addr, int namelen);
6975int (PASCAL *pfn_connect) (SOCKET s, const struct sockaddr *addr, int namelen);
6976int (PASCAL *pfn_ioctlsocket) (SOCKET s, long cmd, u_long *argp);
6977int (PASCAL *pfn_recv) (SOCKET s, char * buf, int len, int flags);
6978int (PASCAL *pfn_send) (SOCKET s, const char * buf, int len, int flags);
6979int (PASCAL *pfn_closesocket) (SOCKET s);
6980int (PASCAL *pfn_shutdown) (SOCKET s, int how);
6981int (PASCAL *pfn_WSACleanup) (void);
6982
6983u_short (PASCAL *pfn_htons) (u_short hostshort);
6984u_short (PASCAL *pfn_ntohs) (u_short netshort);
6985unsigned long (PASCAL *pfn_inet_addr) (const char * cp);
6986int (PASCAL *pfn_gethostname) (char * name, int namelen);
6987struct hostent * (PASCAL *pfn_gethostbyname) (const char * name);
6988struct servent * (PASCAL *pfn_getservbyname) (const char * name, const char * proto);
ecd270eb 6989int (PASCAL *pfn_getpeername) (SOCKET s, struct sockaddr *addr, int * namelen);
962955c5
JR		 6990int (PASCAL *pfn_setsockopt) (SOCKET s, int level, int optname,
6991 const char * optval, int optlen);
6992int (PASCAL *pfn_listen) (SOCKET s, int backlog);
6993int (PASCAL *pfn_getsockname) (SOCKET s, struct sockaddr * name,
6994 int * namelen);
6995SOCKET (PASCAL *pfn_accept) (SOCKET s, struct sockaddr * addr, int * addrlen);
6996int (PASCAL *pfn_recvfrom) (SOCKET s, char * buf, int len, int flags,
6997 struct sockaddr * from, int * fromlen);
6998int (PASCAL *pfn_sendto) (SOCKET s, const char * buf, int len, int flags,
6999 const struct sockaddr * to, int tolen);
7000
f1614061
RS		 7001/* SetHandleInformation is only needed to make sockets non-inheritable. */
7002BOOL (WINAPI *pfn_SetHandleInformation) (HANDLE object, DWORD mask, DWORD flags);
7003#ifndef HANDLE_FLAG_INHERIT
7004#define HANDLE_FLAG_INHERIT 1
7005#endif
480b0c5b 7006
f249a012
RS		 7007HANDLE winsock_lib;
7008static int winsock_inuse;
480b0c5b 7009
f249a012 7010BOOL
480b0c5b
GV		 7011term_winsock (void)
7012{
f249a012 7013 if (winsock_lib != NULL && winsock_inuse == 0)
480b0c5b 7014 {
3f940c5a 7015 release_listen_threads ();
f249a012
RS		 7016 /* Not sure what would cause WSAENETDOWN, or even if it can happen
7017 after WSAStartup returns successfully, but it seems reasonable
7018 to allow unloading winsock anyway in that case. */
7019 if (pfn_WSACleanup () == 0 ||
7020 pfn_WSAGetLastError () == WSAENETDOWN)
7021 {
7022 if (FreeLibrary (winsock_lib))
7023 winsock_lib = NULL;
7024 return TRUE;
7025 }
480b0c5b 7026 }
f249a012 7027 return FALSE;
480b0c5b
GV		 7028}
7029
f249a012
RS		 7030BOOL
7031init_winsock (int load_now)
480b0c5b
GV		 7032{
7033 WSADATA winsockData;
7034
f249a012
RS		 7035 if (winsock_lib != NULL)
7036 return TRUE;
f1614061 7037
f1614061
RS		 7038 pfn_SetHandleInformation
7039 = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"),
7040 "SetHandleInformation");
7041
64570b36 7042 winsock_lib = LoadLibrary ("Ws2_32.dll");
480b0c5b
GV		 7043
7044 if (winsock_lib != NULL)
7045 {
7046 /* dynamically link to socket functions */
7047
7048#define LOAD_PROC(fn) \
7049 if ((pfn_##fn = (void *) GetProcAddress (winsock_lib, #fn)) == NULL) \
7050 goto fail;
7051
ed3751c8
JB		 7052 LOAD_PROC (WSAStartup);
7053 LOAD_PROC (WSASetLastError);
7054 LOAD_PROC (WSAGetLastError);
7055 LOAD_PROC (WSAEventSelect);
7056 LOAD_PROC (WSACreateEvent);
7057 LOAD_PROC (WSACloseEvent);
7058 LOAD_PROC (socket);
7059 LOAD_PROC (bind);
7060 LOAD_PROC (connect);
7061 LOAD_PROC (ioctlsocket);
7062 LOAD_PROC (recv);
7063 LOAD_PROC (send);
7064 LOAD_PROC (closesocket);
7065 LOAD_PROC (shutdown);
7066 LOAD_PROC (htons);
7067 LOAD_PROC (ntohs);
7068 LOAD_PROC (inet_addr);
7069 LOAD_PROC (gethostname);
7070 LOAD_PROC (gethostbyname);
7071 LOAD_PROC (getservbyname);
7072 LOAD_PROC (getpeername);
7073 LOAD_PROC (WSACleanup);
7074 LOAD_PROC (setsockopt);
7075 LOAD_PROC (listen);
7076 LOAD_PROC (getsockname);
7077 LOAD_PROC (accept);
7078 LOAD_PROC (recvfrom);
7079 LOAD_PROC (sendto);
f249a012
RS		 7080#undef LOAD_PROC
7081
480b0c5b
GV		 7082 /* specify version 1.1 of winsock */
7083 if (pfn_WSAStartup (0x101, &winsockData) == 0)
7084 {
f249a012
RS		 7085 if (winsockData.wVersion != 0x101)
7086 goto fail;
7087
7088 if (!load_now)
7089 {
7090 /* Report that winsock exists and is usable, but leave
7091 socket functions disabled. I am assuming that calling
7092 WSAStartup does not require any network interaction,
7093 and in particular does not cause or require a dial-up
7094 connection to be established. */
7095
7096 pfn_WSACleanup ();
7097 FreeLibrary (winsock_lib);
7098 winsock_lib = NULL;
7099 }
7100 winsock_inuse = 0;
7101 return TRUE;
480b0c5b
GV		 7102 }
7103
7104 fail:
7105 FreeLibrary (winsock_lib);
f249a012 7106 winsock_lib = NULL;
480b0c5b 7107 }
f249a012
RS		 7108
7109 return FALSE;
480b0c5b
GV		 7110}
7111
7112
7113int h_errno = 0;
7114
f277993b
EZ		 7115/* Function to map winsock error codes to errno codes for those errno
7116 code defined in errno.h (errno values not defined by errno.h are
7117 already in nt/inc/sys/socket.h). */
9bfb11f9 7118static void
b56ceb92 7119set_errno (void)
480b0c5b 7120{
f277993b
EZ		 7121 int wsa_err;
7122
7123 h_errno = 0;
f249a012 7124 if (winsock_lib == NULL)
f277993b 7125 wsa_err = EINVAL;
480b0c5b 7126 else
f277993b 7127 wsa_err = pfn_WSAGetLastError ();
480b0c5b 7128
f277993b 7129 switch (wsa_err)
480b0c5b 7130 {
f277993b
EZ		 7131 case WSAEACCES: errno = EACCES; break;
7132 case WSAEBADF: errno = EBADF; break;
7133 case WSAEFAULT: errno = EFAULT; break;
7134 case WSAEINTR: errno = EINTR; break;
7135 case WSAEINVAL: errno = EINVAL; break;
7136 case WSAEMFILE: errno = EMFILE; break;
7137 case WSAENAMETOOLONG: errno = ENAMETOOLONG; break;
7138 case WSAENOTEMPTY: errno = ENOTEMPTY; break;
7139 default: errno = wsa_err; break;
480b0c5b 7140 }
480b0c5b
GV		 7141}
7142
9bfb11f9 7143static void
b56ceb92 7144check_errno (void)
480b0c5b 7145{
f277993b
EZ		 7146 h_errno = 0;
7147 if (winsock_lib != NULL)
480b0c5b
GV		 7148 pfn_WSASetLastError (0);
7149}
7150
d8fcc1b9
AI		 7151/* Extend strerror to handle the winsock-specific error codes. */
7152struct {
7153 int errnum;
7154 char * msg;
7155} _wsa_errlist[] = {
1db5b1ad
JB		 7156 {WSAEINTR , "Interrupted function call"},
7157 {WSAEBADF , "Bad file descriptor"},
7158 {WSAEACCES , "Permission denied"},
7159 {WSAEFAULT , "Bad address"},
7160 {WSAEINVAL , "Invalid argument"},
7161 {WSAEMFILE , "Too many open files"},
7162
7163 {WSAEWOULDBLOCK , "Resource temporarily unavailable"},
7164 {WSAEINPROGRESS , "Operation now in progress"},
7165 {WSAEALREADY , "Operation already in progress"},
7166 {WSAENOTSOCK , "Socket operation on non-socket"},
7167 {WSAEDESTADDRREQ , "Destination address required"},
7168 {WSAEMSGSIZE , "Message too long"},
7169 {WSAEPROTOTYPE , "Protocol wrong type for socket"},
7170 {WSAENOPROTOOPT , "Bad protocol option"},
7171 {WSAEPROTONOSUPPORT , "Protocol not supported"},
7172 {WSAESOCKTNOSUPPORT , "Socket type not supported"},
7173 {WSAEOPNOTSUPP , "Operation not supported"},
7174 {WSAEPFNOSUPPORT , "Protocol family not supported"},
7175 {WSAEAFNOSUPPORT , "Address family not supported by protocol family"},
7176 {WSAEADDRINUSE , "Address already in use"},
7177 {WSAEADDRNOTAVAIL , "Cannot assign requested address"},
7178 {WSAENETDOWN , "Network is down"},
7179 {WSAENETUNREACH , "Network is unreachable"},
7180 {WSAENETRESET , "Network dropped connection on reset"},
7181 {WSAECONNABORTED , "Software caused connection abort"},
7182 {WSAECONNRESET , "Connection reset by peer"},
7183 {WSAENOBUFS , "No buffer space available"},
7184 {WSAEISCONN , "Socket is already connected"},
7185 {WSAENOTCONN , "Socket is not connected"},
7186 {WSAESHUTDOWN , "Cannot send after socket shutdown"},
7187 {WSAETOOMANYREFS , "Too many references"}, /* not sure */
7188 {WSAETIMEDOUT , "Connection timed out"},
7189 {WSAECONNREFUSED , "Connection refused"},
7190 {WSAELOOP , "Network loop"}, /* not sure */
7191 {WSAENAMETOOLONG , "Name is too long"},
7192 {WSAEHOSTDOWN , "Host is down"},
7193 {WSAEHOSTUNREACH , "No route to host"},
7194 {WSAENOTEMPTY , "Buffer not empty"}, /* not sure */
7195 {WSAEPROCLIM , "Too many processes"},
7196 {WSAEUSERS , "Too many users"}, /* not sure */
7197 {WSAEDQUOT , "Double quote in host name"}, /* really not sure */
7198 {WSAESTALE , "Data is stale"}, /* not sure */
7199 {WSAEREMOTE , "Remote error"}, /* not sure */
7200
7201 {WSASYSNOTREADY , "Network subsystem is unavailable"},
7202 {WSAVERNOTSUPPORTED , "WINSOCK.DLL version out of range"},
7203 {WSANOTINITIALISED , "Winsock not initialized successfully"},
7204 {WSAEDISCON , "Graceful shutdown in progress"},
d8fcc1b9 7205#ifdef WSAENOMORE
1db5b1ad
JB		 7206 {WSAENOMORE , "No more operations allowed"}, /* not sure */
7207 {WSAECANCELLED , "Operation cancelled"}, /* not sure */
7208 {WSAEINVALIDPROCTABLE , "Invalid procedure table from service provider"},
7209 {WSAEINVALIDPROVIDER , "Invalid service provider version number"},
7210 {WSAEPROVIDERFAILEDINIT , "Unable to initialize a service provider"},
7211 {WSASYSCALLFAILURE , "System call failure"},
7212 {WSASERVICE_NOT_FOUND , "Service not found"}, /* not sure */
7213 {WSATYPE_NOT_FOUND , "Class type not found"},
7214 {WSA_E_NO_MORE , "No more resources available"}, /* really not sure */
7215 {WSA_E_CANCELLED , "Operation already cancelled"}, /* really not sure */
7216 {WSAEREFUSED , "Operation refused"}, /* not sure */
d8fcc1b9 7217#endif
177c0ea7 7218
1db5b1ad
JB		 7219 {WSAHOST_NOT_FOUND , "Host not found"},
7220 {WSATRY_AGAIN , "Authoritative host not found during name lookup"},
7221 {WSANO_RECOVERY , "Non-recoverable error during name lookup"},
7222 {WSANO_DATA , "Valid name, no data record of requested type"},
d8fcc1b9 7223
1db5b1ad 7224 {-1, NULL}
d8fcc1b9
AI		 7225};
7226
7227char *
ed3751c8 7228sys_strerror (int error_no)
d8fcc1b9
AI		 7229{
7230 int i;
7231 static char unknown_msg[40];
7232
a302c7ae
AI		 7233 if (error_no >= 0 && error_no < sys_nerr)
7234 return sys_errlist[error_no];
d8fcc1b9
AI		 7235
7236 for (i = 0; _wsa_errlist[i].errnum >= 0; i++)
7237 if (_wsa_errlist[i].errnum == error_no)
7238 return _wsa_errlist[i].msg;
7239
ed3751c8 7240 sprintf (unknown_msg, "Unidentified error: %d", error_no);
d8fcc1b9
AI		 7241 return unknown_msg;
7242}
7243
480b0c5b
GV		 7244/* [andrewi 3-May-96] I've had conflicting results using both methods,
7245 but I believe the method of keeping the socket handle separate (and
7246 insuring it is not inheritable) is the correct one. */
7247
480b0c5b 7248#define SOCK_HANDLE(fd) ((SOCKET) fd_info[fd].hnd)
480b0c5b 7249
bedf4aab 7250static int socket_to_fd (SOCKET s);
962955c5 7251
480b0c5b 7252int
ed3751c8 7253sys_socket (int af, int type, int protocol)
480b0c5b 7254{
962955c5 7255 SOCKET s;
480b0c5b 7256
f249a012 7257 if (winsock_lib == NULL)
480b0c5b 7258 {
f277993b 7259 errno = ENETDOWN;
480b0c5b
GV		 7260 return INVALID_SOCKET;
7261 }
7262
7263 check_errno ();
7264
7265 /* call the real socket function */
962955c5 7266 s = pfn_socket (af, type, protocol);
177c0ea7 7267
480b0c5b 7268 if (s != INVALID_SOCKET)
f277993b 7269 return socket_to_fd (s);
480b0c5b 7270
962955c5
JR		 7271 set_errno ();
7272 return -1;
7273}
7274
7275/* Convert a SOCKET to a file descriptor. */
bedf4aab 7276static int
962955c5
JR		 7277socket_to_fd (SOCKET s)
7278{
7279 int fd;
7280 child_process * cp;
7281
7282 /* Although under NT 3.5 _open_osfhandle will accept a socket
7283 handle, if opened with SO_OPENTYPE == SO_SYNCHRONOUS_NONALERT,
7284 that does not work under NT 3.1. However, we can get the same
7285 effect by using a backdoor function to replace an existing
7286 descriptor handle with the one we want. */
7287
7288 /* allocate a file descriptor (with appropriate flags) */
7289 fd = _open ("NUL:", _O_RDWR);
7290 if (fd >= 0)
7291 {
962955c5
JR		 7292 /* Make a non-inheritable copy of the socket handle. Note
7293 that it is possible that sockets aren't actually kernel
7294 handles, which appears to be the case on Windows 9x when
7295 the MS Proxy winsock client is installed. */
7296 {
7297 /* Apparently there is a bug in NT 3.51 with some service
7298 packs, which prevents using DuplicateHandle to make a
7299 socket handle non-inheritable (causes WSACleanup to
7300 hang). The work-around is to use SetHandleInformation
7301 instead if it is available and implemented. */
7302 if (pfn_SetHandleInformation)
480b0c5b 7303 {
962955c5
JR		 7304 pfn_SetHandleInformation ((HANDLE) s, HANDLE_FLAG_INHERIT, 0);
7305 }
7306 else
7307 {
7308 HANDLE parent = GetCurrentProcess ();
7309 HANDLE new_s = INVALID_HANDLE_VALUE;
7310
7311 if (DuplicateHandle (parent,
7312 (HANDLE) s,
7313 parent,
7314 &new_s,
7315 0,
7316 FALSE,
7317 DUPLICATE_SAME_ACCESS))
f1614061 7318 {
962955c5
JR		 7319 /* It is possible that DuplicateHandle succeeds even
7320 though the socket wasn't really a kernel handle,
7321 because a real handle has the same value. So
7322 test whether the new handle really is a socket. */
7323 long nonblocking = 0;
7324 if (pfn_ioctlsocket ((SOCKET) new_s, FIONBIO, &nonblocking) == 0)
ca149beb 7325 {
962955c5
JR		 7326 pfn_closesocket (s);
7327 s = (SOCKET) new_s;
7328 }
7329 else
7330 {
7331 CloseHandle (new_s);
7332 }
177c0ea7 7333 }
480b0c5b 7334 }
962955c5 7335 }
bcf7fe2a 7336 eassert (fd < MAXDESC);
962955c5 7337 fd_info[fd].hnd = (HANDLE) s;
480b0c5b 7338
962955c5
JR		 7339 /* set our own internal flags */
7340 fd_info[fd].flags = FILE_SOCKET | FILE_BINARY | FILE_READ | FILE_WRITE;
480b0c5b 7341
962955c5
JR		 7342 cp = new_child ();
7343 if (cp)
7344 {
7345 cp->fd = fd;
7346 cp->status = STATUS_READ_ACKNOWLEDGED;
480b0c5b 7347
962955c5
JR		 7348 /* attach child_process to fd_info */
7349 if (fd_info[ fd ].cp != NULL)
7350 {
7351 DebPrint (("sys_socket: fd_info[%d] apparently in use!\n", fd));
1088b922 7352 emacs_abort ();
480b0c5b
GV		 7353 }
7354
962955c5
JR		 7355 fd_info[ fd ].cp = cp;
7356
7357 /* success! */
7358 winsock_inuse++; /* count open sockets */
7359 return fd;
480b0c5b 7360 }
480b0c5b 7361
962955c5
JR		 7362 /* clean up */
7363 _close (fd);
7364 }
f277993b 7365 else
962955c5 7366 pfn_closesocket (s);
f277993b 7367 errno = EMFILE;
480b0c5b
GV		 7368 return -1;
7369}
7370
480b0c5b
GV		 7371int
7372sys_bind (int s, const struct sockaddr * addr, int namelen)
7373{
f249a012 7374 if (winsock_lib == NULL)
480b0c5b 7375 {
f277993b 7376 errno = ENOTSOCK;
480b0c5b
GV		 7377 return SOCKET_ERROR;
7378 }
7379
7380 check_errno ();
7381 if (fd_info[s].flags & FILE_SOCKET)
7382 {
7383 int rc = pfn_bind (SOCK_HANDLE (s), addr, namelen);
7384 if (rc == SOCKET_ERROR)
7385 set_errno ();
7386 return rc;
7387 }
f277993b 7388 errno = ENOTSOCK;
480b0c5b
GV		 7389 return SOCKET_ERROR;
7390}
7391
480b0c5b
GV		 7392int
7393sys_connect (int s, const struct sockaddr * name, int namelen)
7394{
f249a012 7395 if (winsock_lib == NULL)
480b0c5b 7396 {
f277993b 7397 errno = ENOTSOCK;
480b0c5b
GV		 7398 return SOCKET_ERROR;
7399 }
7400
7401 check_errno ();
7402 if (fd_info[s].flags & FILE_SOCKET)
7403 {
7404 int rc = pfn_connect (SOCK_HANDLE (s), name, namelen);
7405 if (rc == SOCKET_ERROR)
7406 set_errno ();
7407 return rc;
7408 }
f277993b 7409 errno = ENOTSOCK;
480b0c5b
GV		 7410 return SOCKET_ERROR;
7411}
7412
7413u_short
7414sys_htons (u_short hostshort)
7415{
f249a012 7416 return (winsock_lib != NULL) ?
480b0c5b
GV		 7417 pfn_htons (hostshort) : hostshort;
7418}
7419
7420u_short
7421sys_ntohs (u_short netshort)
7422{
f249a012 7423 return (winsock_lib != NULL) ?
480b0c5b
GV		 7424 pfn_ntohs (netshort) : netshort;
7425}
7426
7427unsigned long
7428sys_inet_addr (const char * cp)
7429{
f249a012 7430 return (winsock_lib != NULL) ?
480b0c5b
GV		 7431 pfn_inet_addr (cp) : INADDR_NONE;
7432}
7433
7434int
7435sys_gethostname (char * name, int namelen)
7436{
f249a012 7437 if (winsock_lib != NULL)
f277993b
EZ		 7438 {
7439 int retval;
7440
7441 check_errno ();
7442 retval = pfn_gethostname (name, namelen);
7443 if (retval == SOCKET_ERROR)
7444 set_errno ();
7445 return retval;
7446 }
480b0c5b
GV		 7447
7448 if (namelen > MAX_COMPUTERNAME_LENGTH)
a302c7ae 7449 return !GetComputerName (name, (DWORD *)&namelen);
480b0c5b 7450
f277993b 7451 errno = EFAULT;
480b0c5b
GV		 7452 return SOCKET_ERROR;
7453}
7454
7455struct hostent *
ed3751c8 7456sys_gethostbyname (const char * name)
480b0c5b
GV		 7457{
7458 struct hostent * host;
f277993b 7459 int h_err = h_errno;
480b0c5b 7460
f249a012 7461 if (winsock_lib == NULL)
480b0c5b 7462 {
f277993b
EZ		 7463 h_errno = NO_RECOVERY;
7464 errno = ENETDOWN;
480b0c5b
GV		 7465 return NULL;
7466 }
7467
7468 check_errno ();
7469 host = pfn_gethostbyname (name);
7470 if (!host)
f277993b
EZ		 7471 {
7472 set_errno ();
7473 h_errno = errno;
7474 }
7475 else
7476 h_errno = h_err;
480b0c5b
GV		 7477 return host;
7478}
7479
7480struct servent *
ed3751c8 7481sys_getservbyname (const char * name, const char * proto)
480b0c5b
GV		 7482{
7483 struct servent * serv;
7484
f249a012 7485 if (winsock_lib == NULL)
480b0c5b 7486 {
f277993b 7487 errno = ENETDOWN;
480b0c5b
GV		 7488 return NULL;
7489 }
7490
7491 check_errno ();
7492 serv = pfn_getservbyname (name, proto);
7493 if (!serv)
7494 set_errno ();
7495 return serv;
7496}
7497
ecd270eb
JR		 7498int
7499sys_getpeername (int s, struct sockaddr *addr, int * namelen)
7500{
7501 if (winsock_lib == NULL)
7502 {
f277993b 7503 errno = ENETDOWN;
ecd270eb
JR		 7504 return SOCKET_ERROR;
7505 }
7506
7507 check_errno ();
7508 if (fd_info[s].flags & FILE_SOCKET)
7509 {
7510 int rc = pfn_getpeername (SOCK_HANDLE (s), addr, namelen);
7511 if (rc == SOCKET_ERROR)
7512 set_errno ();
7513 return rc;
7514 }
f277993b 7515 errno = ENOTSOCK;
ecd270eb
JR		 7516 return SOCKET_ERROR;
7517}
7518
380961a6
GV		 7519int
7520sys_shutdown (int s, int how)
7521{
380961a6
GV		 7522 if (winsock_lib == NULL)
7523 {
f277993b 7524 errno = ENETDOWN;
380961a6
GV		 7525 return SOCKET_ERROR;
7526 }
7527
7528 check_errno ();
7529 if (fd_info[s].flags & FILE_SOCKET)
7530 {
7531 int rc = pfn_shutdown (SOCK_HANDLE (s), how);
962955c5
JR		 7532 if (rc == SOCKET_ERROR)
7533 set_errno ();
7534 return rc;
7535 }
f277993b 7536 errno = ENOTSOCK;
962955c5
JR		 7537 return SOCKET_ERROR;
7538}
7539
7540int
a5a389bb 7541sys_setsockopt (int s, int level, int optname, const void * optval, int optlen)
962955c5
JR		 7542{
7543 if (winsock_lib == NULL)
7544 {
f277993b 7545 errno = ENETDOWN;
962955c5
JR		 7546 return SOCKET_ERROR;
7547 }
7548
7549 check_errno ();
7550 if (fd_info[s].flags & FILE_SOCKET)
7551 {
7552 int rc = pfn_setsockopt (SOCK_HANDLE (s), level, optname,
a5a389bb 7553 (const char *)optval, optlen);
962955c5
JR		 7554 if (rc == SOCKET_ERROR)
7555 set_errno ();
7556 return rc;
7557 }
f277993b 7558 errno = ENOTSOCK;
177c0ea7 7559 return SOCKET_ERROR;
962955c5
JR		 7560}
7561
7562int
7563sys_listen (int s, int backlog)
7564{
7565 if (winsock_lib == NULL)
7566 {
f277993b 7567 errno = ENETDOWN;
962955c5
JR		 7568 return SOCKET_ERROR;
7569 }
7570
7571 check_errno ();
7572 if (fd_info[s].flags & FILE_SOCKET)
7573 {
7574 int rc = pfn_listen (SOCK_HANDLE (s), backlog);
7575 if (rc == SOCKET_ERROR)
7576 set_errno ();
26fb7bc4 7577 else
64570b36 7578 fd_info[s].flags |= FILE_LISTEN;
962955c5
JR		 7579 return rc;
7580 }
f277993b 7581 errno = ENOTSOCK;
177c0ea7 7582 return SOCKET_ERROR;
962955c5
JR		 7583}
7584
7585int
7586sys_getsockname (int s, struct sockaddr * name, int * namelen)
7587{
7588 if (winsock_lib == NULL)
7589 {
f277993b 7590 errno = ENETDOWN;
962955c5
JR		 7591 return SOCKET_ERROR;
7592 }
7593
7594 check_errno ();
7595 if (fd_info[s].flags & FILE_SOCKET)
7596 {
7597 int rc = pfn_getsockname (SOCK_HANDLE (s), name, namelen);
7598 if (rc == SOCKET_ERROR)
7599 set_errno ();
7600 return rc;
7601 }
f277993b 7602 errno = ENOTSOCK;
177c0ea7 7603 return SOCKET_ERROR;
962955c5
JR		 7604}
7605
7606int
7607sys_accept (int s, struct sockaddr * addr, int * addrlen)
7608{
7609 if (winsock_lib == NULL)
7610 {
f277993b 7611 errno = ENETDOWN;
962955c5
JR		 7612 return -1;
7613 }
7614
7615 check_errno ();
26fb7bc4 7616 if (fd_info[s].flags & FILE_LISTEN)
962955c5 7617 {
a0ad1860 7618 SOCKET t = pfn_accept (SOCK_HANDLE (s), addr, addrlen);
64570b36
KS		 7619 int fd = -1;
7620 if (t == INVALID_SOCKET)
7621 set_errno ();
7622 else
f277993b 7623 fd = socket_to_fd (t);
962955c5 7624
bcf7fe2a
EZ		 7625 if (fd >= 0)
7626 {
7627 fd_info[s].cp->status = STATUS_READ_ACKNOWLEDGED;
7628 ResetEvent (fd_info[s].cp->char_avail);
7629 }
64570b36 7630 return fd;
962955c5 7631 }
f277993b 7632 errno = ENOTSOCK;
962955c5
JR		 7633 return -1;
7634}
7635
7636int
7637sys_recvfrom (int s, char * buf, int len, int flags,
b56ceb92 7638 struct sockaddr * from, int * fromlen)
962955c5
JR		 7639{
7640 if (winsock_lib == NULL)
7641 {
f277993b 7642 errno = ENETDOWN;
962955c5
JR		 7643 return SOCKET_ERROR;
7644 }
7645
7646 check_errno ();
7647 if (fd_info[s].flags & FILE_SOCKET)
7648 {
7649 int rc = pfn_recvfrom (SOCK_HANDLE (s), buf, len, flags, from, fromlen);
7650 if (rc == SOCKET_ERROR)
7651 set_errno ();
7652 return rc;
7653 }
f277993b 7654 errno = ENOTSOCK;
962955c5
JR		 7655 return SOCKET_ERROR;
7656}
7657
7658int
7659sys_sendto (int s, const char * buf, int len, int flags,
7660 const struct sockaddr * to, int tolen)
7661{
7662 if (winsock_lib == NULL)
7663 {
f277993b 7664 errno = ENETDOWN;
962955c5
JR		 7665 return SOCKET_ERROR;
7666 }
7667
7668 check_errno ();
7669 if (fd_info[s].flags & FILE_SOCKET)
7670 {
7671 int rc = pfn_sendto (SOCK_HANDLE (s), buf, len, flags, to, tolen);
380961a6
GV		 7672 if (rc == SOCKET_ERROR)
7673 set_errno ();
7674 return rc;
7675 }
f277993b 7676 errno = ENOTSOCK;
380961a6
GV		 7677 return SOCKET_ERROR;
7678}
7679
ecd270eb 7680/* Windows does not have an fcntl function. Provide an implementation
067428c1 7681 good enough for Emacs. */
ecd270eb
JR		 7682int
7683fcntl (int s, int cmd, int options)
7684{
067428c1
PE		 7685 /* In the w32 Emacs port, fcntl (fd, F_DUPFD_CLOEXEC, fd1) is always
7686 invoked in a context where fd1 is closed and all descriptors less
7687 than fd1 are open, so sys_dup is an adequate implementation. */
7688 if (cmd == F_DUPFD_CLOEXEC)
7689 return sys_dup (s);
7690
ecd270eb
JR		 7691 if (winsock_lib == NULL)
7692 {
f277993b 7693 errno = ENETDOWN;
ecd270eb
JR		 7694 return -1;
7695 }
7696
7697 check_errno ();
7698 if (fd_info[s].flags & FILE_SOCKET)
7699 {
49cdacda 7700 if (cmd == F_SETFL && options == O_NONBLOCK)
ecd270eb
JR		 7701 {
7702 unsigned long nblock = 1;
7703 int rc = pfn_ioctlsocket (SOCK_HANDLE (s), FIONBIO, &nblock);
7704 if (rc == SOCKET_ERROR)
9d4f32e8 7705 set_errno ();
ecd270eb
JR		 7706 /* Keep track of the fact that we set this to non-blocking. */
7707 fd_info[s].flags |= FILE_NDELAY;
7708 return rc;
7709 }
7710 else
7711 {
f277993b 7712 errno = EINVAL;
ecd270eb
JR		 7713 return SOCKET_ERROR;
7714 }
7715 }
f277993b 7716 errno = ENOTSOCK;
ecd270eb
JR		 7717 return SOCKET_ERROR;
7718}
7719
480b0c5b
GV		 7720
7721/* Shadow main io functions: we need to handle pipes and sockets more
7722 intelligently, and implement non-blocking mode as well. */
7723
7724int
7725sys_close (int fd)
7726{
7727 int rc;
7728
7559f399 7729 if (fd < 0)
480b0c5b
GV		 7730 {
7731 errno = EBADF;
7732 return -1;
7733 }
7734
7559f399 7735 if (fd < MAXDESC && fd_info[fd].cp)
480b0c5b
GV		 7736 {
7737 child_process * cp = fd_info[fd].cp;
7738
7739 fd_info[fd].cp = NULL;
7740
7741 if (CHILD_ACTIVE (cp))
7742 {
7743 /* if last descriptor to active child_process then cleanup */
7744 int i;
7745 for (i = 0; i < MAXDESC; i++)
7746 {
7747 if (i == fd)
7748 continue;
7749 if (fd_info[i].cp == cp)
7750 break;
7751 }
7752 if (i == MAXDESC)
7753 {
480b0c5b
GV		 7754 if (fd_info[fd].flags & FILE_SOCKET)
7755 {
1088b922 7756 if (winsock_lib == NULL) emacs_abort ();
480b0c5b
GV		 7757
7758 pfn_shutdown (SOCK_HANDLE (fd), 2);
7759 rc = pfn_closesocket (SOCK_HANDLE (fd));
7d701334 7760
f249a012 7761 winsock_inuse--; /* count open sockets */
480b0c5b 7762 }
299614f3
EZ		 7763 /* If the process handle is NULL, it's either a socket
7764 or serial connection, or a subprocess that was
7765 already reaped by reap_subprocess, but whose
7766 resources were not yet freed, because its output was
7767 not fully read yet by the time it was reaped. (This
7768 usually happens with async subprocesses whose output
7769 is being read by Emacs.) Otherwise, this process was
7770 not reaped yet, so we set its FD to a negative value
7771 to make sure sys_select will eventually get to
7772 calling the SIGCHLD handler for it, which will then
7773 invoke waitpid and reap_subprocess. */
7774 if (cp->procinfo.hProcess == NULL)
7775 delete_child (cp);
7776 else
7777 cp->fd = -1;
480b0c5b
GV		 7778 }
7779 }
7780 }
7781
224f4ec1
EZ		 7782 if (fd >= 0 && fd < MAXDESC)
7783 fd_info[fd].flags = 0;
7784
480b0c5b 7785 /* Note that sockets do not need special treatment here (at least on
e9e23e23 7786 NT and Windows 95 using the standard tcp/ip stacks) - it appears that
480b0c5b
GV		 7787 closesocket is equivalent to CloseHandle, which is to be expected
7788 because socket handles are fully fledged kernel handles. */
7789 rc = _close (fd);
7790
480b0c5b
GV		 7791 return rc;
7792}
7793
7794int
7795sys_dup (int fd)
7796{
7797 int new_fd;
7798
7799 new_fd = _dup (fd);
7559f399 7800 if (new_fd >= 0 && new_fd < MAXDESC)
480b0c5b
GV		 7801 {
7802 /* duplicate our internal info as well */
7803 fd_info[new_fd] = fd_info[fd];
7804 }
7805 return new_fd;
7806}
7807
480b0c5b
GV		 7808int
7809sys_dup2 (int src, int dst)
7810{
7811 int rc;
7812
7813 if (dst < 0 || dst >= MAXDESC)
7814 {
7815 errno = EBADF;
7816 return -1;
7817 }
7818
7819 /* make sure we close the destination first if it's a pipe or socket */
7820 if (src != dst && fd_info[dst].flags != 0)
7821 sys_close (dst);
177c0ea7 7822
480b0c5b
GV		 7823 rc = _dup2 (src, dst);
7824 if (rc == 0)
7825 {
7826 /* duplicate our internal info as well */
7827 fd_info[dst] = fd_info[src];
7828 }
7829 return rc;
7830}
7831
480b0c5b 7832int
067428c1 7833pipe2 (int * phandles, int pipe2_flags)
480b0c5b
GV		 7834{
7835 int rc;
7836 unsigned flags;
480b0c5b 7837
067428c1
PE		 7838 eassert (pipe2_flags == O_CLOEXEC);
7839
76b3903d
GV		 7840 /* make pipe handles non-inheritable; when we spawn a child, we
7841 replace the relevant handle with an inheritable one. Also put
7842 pipes into binary mode; we will do text mode translation ourselves
7843 if required. */
7844 rc = _pipe (phandles, 0, _O_NOINHERIT | _O_BINARY);
480b0c5b
GV		 7845
7846 if (rc == 0)
7847 {
cb72110d
JR		 7848 /* Protect against overflow, since Windows can open more handles than
7849 our fd_info array has room for. */
7850 if (phandles[0] >= MAXDESC || phandles[1] >= MAXDESC)
7851 {
7852 _close (phandles[0]);
7853 _close (phandles[1]);
6e432f0c 7854 errno = EMFILE;
cb72110d
JR		 7855 rc = -1;
7856 }
7857 else
7858 {
7859 flags = FILE_PIPE | FILE_READ | FILE_BINARY;
7860 fd_info[phandles[0]].flags = flags;
480b0c5b 7861
cb72110d
JR		 7862 flags = FILE_PIPE | FILE_WRITE | FILE_BINARY;
7863 fd_info[phandles[1]].flags = flags;
7864 }
480b0c5b
GV		 7865 }
7866
7867 return rc;
7868}
7869
7870/* Function to do blocking read of one byte, needed to implement
d3d14b40
EZ		 7871 select. It is only allowed on communication ports, sockets, or
7872 pipes. */
480b0c5b
GV		 7873int
7874_sys_read_ahead (int fd)
7875{
7876 child_process * cp;
7877 int rc;
7878
7879 if (fd < 0 || fd >= MAXDESC)
7880 return STATUS_READ_ERROR;
7881
7882 cp = fd_info[fd].cp;
7883
7884 if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY)
7885 return STATUS_READ_ERROR;
7886
d888760c 7887 if ((fd_info[fd].flags & (FILE_PIPE | FILE_SERIAL | FILE_SOCKET)) == 0
480b0c5b
GV		 7888 || (fd_info[fd].flags & FILE_READ) == 0)
7889 {
d888760c 7890 DebPrint (("_sys_read_ahead: internal error: fd %d is not a pipe, serial port, or socket!\n", fd));
1088b922 7891 emacs_abort ();
480b0c5b 7892 }
177c0ea7 7893
480b0c5b 7894 cp->status = STATUS_READ_IN_PROGRESS;
177c0ea7 7895
480b0c5b 7896 if (fd_info[fd].flags & FILE_PIPE)
f7554349 7897 {
f7554349
KH		 7898 rc = _read (fd, &cp->chr, sizeof (char));
7899
7900 /* Give subprocess time to buffer some more output for us before
e9e23e23 7901 reporting that input is available; we need this because Windows 95
f7554349
KH		 7902 connects DOS programs to pipes by making the pipe appear to be
7903 the normal console stdout - as a result most DOS programs will
d888760c 7904 write to stdout without buffering, ie. one character at a
fbd6baed 7905 time. Even some W32 programs do this - "dir" in a command
f7554349
KH		 7906 shell on NT is very slow if we don't do this. */
7907 if (rc > 0)
7908 {
78806724 7909 int wait = w32_pipe_read_delay;
f7554349
KH		 7910
7911 if (wait > 0)
7912 Sleep (wait);
7913 else if (wait < 0)
7914 while (++wait <= 0)
7915 /* Yield remainder of our time slice, effectively giving a
7916 temporary priority boost to the child process. */
7917 Sleep (0);
7918 }
7919 }
d888760c
GM		 7920 else if (fd_info[fd].flags & FILE_SERIAL)
7921 {
7922 HANDLE hnd = fd_info[fd].hnd;
7923 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_read;
7924 COMMTIMEOUTS ct;
7925
7926 /* Configure timeouts for blocking read. */
7927 if (!GetCommTimeouts (hnd, &ct))
6e432f0c
EZ		 7928 {
7929 cp->status = STATUS_READ_ERROR;
7930 return STATUS_READ_ERROR;
7931 }
d888760c
GM		 7932 ct.ReadIntervalTimeout = 0;
7933 ct.ReadTotalTimeoutMultiplier = 0;
7934 ct.ReadTotalTimeoutConstant = 0;
7935 if (!SetCommTimeouts (hnd, &ct))
6e432f0c
EZ		 7936 {
7937 cp->status = STATUS_READ_ERROR;
7938 return STATUS_READ_ERROR;
7939 }
d888760c
GM		 7940
7941 if (!ReadFile (hnd, &cp->chr, sizeof (char), (DWORD*) &rc, ovl))
7942 {
7943 if (GetLastError () != ERROR_IO_PENDING)
6e432f0c
EZ		 7944 {
7945 cp->status = STATUS_READ_ERROR;
7946 return STATUS_READ_ERROR;
7947 }
d888760c 7948 if (!GetOverlappedResult (hnd, ovl, (DWORD*) &rc, TRUE))
6e432f0c
EZ		 7949 {
7950 cp->status = STATUS_READ_ERROR;
7951 return STATUS_READ_ERROR;
7952 }
d888760c
GM		 7953 }
7954 }
480b0c5b 7955 else if (fd_info[fd].flags & FILE_SOCKET)
ecd270eb
JR		 7956 {
7957 unsigned long nblock = 0;
7958 /* We always want this to block, so temporarily disable NDELAY. */
7959 if (fd_info[fd].flags & FILE_NDELAY)
7960 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
7961
7962 rc = pfn_recv (SOCK_HANDLE (fd), &cp->chr, sizeof (char), 0);
7963
7964 if (fd_info[fd].flags & FILE_NDELAY)
7965 {
7966 nblock = 1;
7967 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
7968 }
7969 }
177c0ea7 7970
480b0c5b
GV		 7971 if (rc == sizeof (char))
7972 cp->status = STATUS_READ_SUCCEEDED;
7973 else
7974 cp->status = STATUS_READ_FAILED;
7975
7976 return cp->status;
7977}
7978
9bfb11f9
KS		 7979int
7980_sys_wait_accept (int fd)
64570b36
KS		 7981{
7982 HANDLE hEv;
7983 child_process * cp;
7984 int rc;
7985
7986 if (fd < 0 || fd >= MAXDESC)
7987 return STATUS_READ_ERROR;
7988
7989 cp = fd_info[fd].cp;
7990
7991 if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY)
7992 return STATUS_READ_ERROR;
7993
7994 cp->status = STATUS_READ_FAILED;
7995
7996 hEv = pfn_WSACreateEvent ();
7997 rc = pfn_WSAEventSelect (SOCK_HANDLE (fd), hEv, FD_ACCEPT);
7998 if (rc != SOCKET_ERROR)
7999 {
3f940c5a
EZ		 8000 do {
8001 rc = WaitForSingleObject (hEv, 500);
8002 Sleep (5);
8003 } while (rc == WAIT_TIMEOUT
8004 && cp->status != STATUS_READ_ERROR
8005 && cp->char_avail);
64570b36 8006 pfn_WSAEventSelect (SOCK_HANDLE (fd), NULL, 0);
64570b36
KS		 8007 if (rc == WAIT_OBJECT_0)
8008 cp->status = STATUS_READ_SUCCEEDED;
8009 }
7046f191 8010 pfn_WSACloseEvent (hEv);
64570b36
KS		 8011
8012 return cp->status;
8013}
8014
480b0c5b
GV		 8015int
8016sys_read (int fd, char * buffer, unsigned int count)
8017{
8018 int nchars;
480b0c5b
GV		 8019 int to_read;
8020 DWORD waiting;
76b3903d 8021 char * orig_buffer = buffer;
480b0c5b 8022
7559f399 8023 if (fd < 0)
480b0c5b
GV		 8024 {
8025 errno = EBADF;
8026 return -1;
8027 }
8028
d888760c 8029 if (fd < MAXDESC && fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET | FILE_SERIAL))
480b0c5b
GV		 8030 {
8031 child_process *cp = fd_info[fd].cp;
8032
8033 if ((fd_info[fd].flags & FILE_READ) == 0)
8034 {
8035 errno = EBADF;
8036 return -1;
8037 }
8038
76b3903d
GV		 8039 nchars = 0;
8040
8041 /* re-read CR carried over from last read */
8042 if (fd_info[fd].flags & FILE_LAST_CR)
8043 {
1088b922 8044 if (fd_info[fd].flags & FILE_BINARY) emacs_abort ();
76b3903d
GV		 8045 *buffer++ = 0x0d;
8046 count--;
8047 nchars++;
f52eb3ef 8048 fd_info[fd].flags &= ~FILE_LAST_CR;
76b3903d
GV		 8049 }
8050
480b0c5b
GV		 8051 /* presence of a child_process structure means we are operating in
8052 non-blocking mode - otherwise we just call _read directly.
8053 Note that the child_process structure might be missing because
8054 reap_subprocess has been called; in this case the pipe is
8055 already broken, so calling _read on it is okay. */
8056 if (cp)
8057 {
8058 int current_status = cp->status;
8059
8060 switch (current_status)
8061 {
8062 case STATUS_READ_FAILED:
8063 case STATUS_READ_ERROR:
f52eb3ef
GV		 8064 /* report normal EOF if nothing in buffer */
8065 if (nchars <= 0)
8066 fd_info[fd].flags |= FILE_AT_EOF;
8067 return nchars;
480b0c5b
GV		 8068
8069 case STATUS_READ_READY:
8070 case STATUS_READ_IN_PROGRESS:
8071 DebPrint (("sys_read called when read is in progress\n"));
8072 errno = EWOULDBLOCK;
8073 return -1;
8074
8075 case STATUS_READ_SUCCEEDED:
8076 /* consume read-ahead char */
8077 *buffer++ = cp->chr;
8078 count--;
76b3903d 8079 nchars++;
480b0c5b
GV		 8080 cp->status = STATUS_READ_ACKNOWLEDGED;
8081 ResetEvent (cp->char_avail);
8082
8083 case STATUS_READ_ACKNOWLEDGED:
8084 break;
8085
8086 default:
8087 DebPrint (("sys_read: bad status %d\n", current_status));
8088 errno = EBADF;
8089 return -1;
8090 }
8091
8092 if (fd_info[fd].flags & FILE_PIPE)
8093 {
8094 PeekNamedPipe ((HANDLE) _get_osfhandle (fd), NULL, 0, NULL, &waiting, NULL);
8095 to_read = min (waiting, (DWORD) count);
f52eb3ef
GV		 8096
8097 if (to_read > 0)
8098 nchars += _read (fd, buffer, to_read);
480b0c5b 8099 }
d888760c
GM		 8100 else if (fd_info[fd].flags & FILE_SERIAL)
8101 {
8102 HANDLE hnd = fd_info[fd].hnd;
8103 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_read;
d888760c
GM		 8104 int rc = 0;
8105 COMMTIMEOUTS ct;
8106
8107 if (count > 0)
8108 {
8109 /* Configure timeouts for non-blocking read. */
8110 if (!GetCommTimeouts (hnd, &ct))
8111 {
8112 errno = EIO;
8113 return -1;
8114 }
8115 ct.ReadIntervalTimeout = MAXDWORD;
8116 ct.ReadTotalTimeoutMultiplier = 0;
8117 ct.ReadTotalTimeoutConstant = 0;
8118 if (!SetCommTimeouts (hnd, &ct))
8119 {
8120 errno = EIO;
8121 return -1;
8122 }
8123
8124 if (!ResetEvent (ovl->hEvent))
8125 {
8126 errno = EIO;
8127 return -1;
8128 }
8129 if (!ReadFile (hnd, buffer, count, (DWORD*) &rc, ovl))
8130 {
8131 if (GetLastError () != ERROR_IO_PENDING)
8132 {
8133 errno = EIO;
8134 return -1;
8135 }
8136 if (!GetOverlappedResult (hnd, ovl, (DWORD*) &rc, TRUE))
8137 {
8138 errno = EIO;
8139 return -1;
8140 }
8141 }
8142 nchars += rc;
8143 }
8144 }
480b0c5b
GV		 8145 else /* FILE_SOCKET */
8146 {
1088b922 8147 if (winsock_lib == NULL) emacs_abort ();
480b0c5b
GV		 8148
8149 /* do the equivalent of a non-blocking read */
8150 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONREAD, &waiting);
76b3903d 8151 if (waiting == 0 && nchars == 0)
480b0c5b 8152 {
f277993b 8153 errno = EWOULDBLOCK;
480b0c5b
GV		 8154 return -1;
8155 }
8156
480b0c5b
GV		 8157 if (waiting)
8158 {
8159 /* always use binary mode for sockets */
76b3903d
GV		 8160 int res = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0);
8161 if (res == SOCKET_ERROR)
480b0c5b 8162 {
ed3751c8
JB		 8163 DebPrint (("sys_read.recv failed with error %d on socket %ld\n",
8164 pfn_WSAGetLastError (), SOCK_HANDLE (fd)));
76b3903d
GV		 8165 set_errno ();
8166 return -1;
480b0c5b 8167 }
76b3903d 8168 nchars += res;
480b0c5b
GV		 8169 }
8170 }
480b0c5b
GV		 8171 }
8172 else
f52eb3ef
GV		 8173 {
8174 int nread = _read (fd, buffer, count);
8175 if (nread >= 0)
8176 nchars += nread;
8177 else if (nchars == 0)
8178 nchars = nread;
8179 }
76b3903d 8180
f52eb3ef
GV		 8181 if (nchars <= 0)
8182 fd_info[fd].flags |= FILE_AT_EOF;
76b3903d 8183 /* Perform text mode translation if required. */
f52eb3ef 8184 else if ((fd_info[fd].flags & FILE_BINARY) == 0)
76b3903d
GV		 8185 {
8186 nchars = crlf_to_lf (nchars, orig_buffer);
8187 /* If buffer contains only CR, return that. To be absolutely
8188 sure we should attempt to read the next char, but in
8189 practice a CR to be followed by LF would not appear by
8190 itself in the buffer. */
8191 if (nchars > 1 && orig_buffer[nchars - 1] == 0x0d)
8192 {
8193 fd_info[fd].flags |= FILE_LAST_CR;
8194 nchars--;
8195 }
76b3903d 8196 }
480b0c5b
GV		 8197 }
8198 else
8199 nchars = _read (fd, buffer, count);
8200
76b3903d 8201 return nchars;
480b0c5b
GV		 8202}
8203
d888760c
GM		 8204/* From w32xfns.c */
8205extern HANDLE interrupt_handle;
8206
480b0c5b
GV		 8207/* For now, don't bother with a non-blocking mode */
8208int
8209sys_write (int fd, const void * buffer, unsigned int count)
8210{
8211 int nchars;
8212
7559f399 8213 if (fd < 0)
480b0c5b
GV		 8214 {
8215 errno = EBADF;
8216 return -1;
8217 }
8218
d888760c 8219 if (fd < MAXDESC && fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET | FILE_SERIAL))
76b3903d
GV		 8220 {
8221 if ((fd_info[fd].flags & FILE_WRITE) == 0)
8222 {
8223 errno = EBADF;
8224 return -1;
8225 }
8226
8227 /* Perform text mode translation if required. */
8228 if ((fd_info[fd].flags & FILE_BINARY) == 0)
8229 {
8230 char * tmpbuf = alloca (count * 2);
8231 unsigned char * src = (void *)buffer;
8232 unsigned char * dst = tmpbuf;
8233 int nbytes = count;
8234
8235 while (1)
8236 {
8237 unsigned char *next;
8238 /* copy next line or remaining bytes */
8239 next = _memccpy (dst, src, '\n', nbytes);
8240 if (next)
8241 {
8242 /* copied one line ending with '\n' */
8243 int copied = next - dst;
8244 nbytes -= copied;
8245 src += copied;
8246 /* insert '\r' before '\n' */
8247 next[-1] = '\r';
8248 next[0] = '\n';
8249 dst = next + 1;
8250 count++;
177c0ea7 8251 }
76b3903d
GV		 8252 else
8253 /* copied remaining partial line -> now finished */
8254 break;
8255 }
8256 buffer = tmpbuf;
8257 }
8258 }
8259
d888760c
GM		 8260 if (fd < MAXDESC && fd_info[fd].flags & FILE_SERIAL)
8261 {
8262 HANDLE hnd = (HANDLE) _get_osfhandle (fd);
8263 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_write;
8264 HANDLE wait_hnd[2] = { interrupt_handle, ovl->hEvent };
8265 DWORD active = 0;
8266
8267 if (!WriteFile (hnd, buffer, count, (DWORD*) &nchars, ovl))
8268 {
8269 if (GetLastError () != ERROR_IO_PENDING)
8270 {
8271 errno = EIO;
8272 return -1;
8273 }
8274 if (detect_input_pending ())
8275 active = MsgWaitForMultipleObjects (2, wait_hnd, FALSE, INFINITE,
8276 QS_ALLINPUT);
8277 else
8278 active = WaitForMultipleObjects (2, wait_hnd, FALSE, INFINITE);
8279 if (active == WAIT_OBJECT_0)
8280 { /* User pressed C-g, cancel write, then leave. Don't bother
8281 cleaning up as we may only get stuck in buggy drivers. */
8282 PurgeComm (hnd, PURGE_TXABORT | PURGE_TXCLEAR);
8283 CancelIo (hnd);
8284 errno = EIO;
8285 return -1;
8286 }
8287 if (active == WAIT_OBJECT_0 + 1
8288 && !GetOverlappedResult (hnd, ovl, (DWORD*) &nchars, TRUE))
8289 {
8290 errno = EIO;
8291 return -1;
8292 }
8293 }
8294 }
7d701334 8295 else if (fd < MAXDESC && fd_info[fd].flags & FILE_SOCKET)
480b0c5b 8296 {
30a32e0e 8297 unsigned long nblock = 0;
1088b922 8298 if (winsock_lib == NULL) emacs_abort ();
30a32e0e
JR		 8299
8300 /* TODO: implement select() properly so non-blocking I/O works. */
8301 /* For now, make sure the write blocks. */
8302 if (fd_info[fd].flags & FILE_NDELAY)
8303 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
8304
480b0c5b 8305 nchars = pfn_send (SOCK_HANDLE (fd), buffer, count, 0);
30a32e0e
JR		 8306
8307 /* Set the socket back to non-blocking if it was before,
8308 for other operations that support it. */
8309 if (fd_info[fd].flags & FILE_NDELAY)
8310 {
8311 nblock = 1;
8312 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
8313 }
8314
480b0c5b
GV		 8315 if (nchars == SOCKET_ERROR)
8316 {
ed3751c8
JB		 8317 DebPrint (("sys_write.send failed with error %d on socket %ld\n",
8318 pfn_WSAGetLastError (), SOCK_HANDLE (fd)));
480b0c5b
GV		 8319 set_errno ();
8320 }
8321 }
8322 else
6e83d800
EZ		 8323 {
8324 /* Some networked filesystems don't like too large writes, so
8325 break them into smaller chunks. See the Comments section of
8326 the MSDN documentation of WriteFile for details behind the
8327 choice of the value of CHUNK below. See also the thread
8328 http://thread.gmane.org/gmane.comp.version-control.git/145294
8329 in the git mailing list. */
8330 const unsigned char *p = buffer;
8331 const unsigned chunk = 30 * 1024 * 1024;
8332
8333 nchars = 0;
8334 while (count > 0)
8335 {
8336 unsigned this_chunk = count < chunk ? count : chunk;
8337 int n = _write (fd, p, this_chunk);
8338
8339 nchars += n;
8340 if (n < 0)
8341 {
8342 nchars = n;
8343 break;
8344 }
8345 else if (n < this_chunk)
8346 break;
8347 count -= n;
8348 p += n;
8349 }
8350 }
480b0c5b
GV		 8351
8352 return nchars;
8353}
8354
3dffe395
EZ		 8355\f
8356/* Emulation of SIOCGIFCONF and getifaddrs, see process.c. */
8357
8358extern Lisp_Object conv_sockaddr_to_lisp (struct sockaddr *, int);
8359
8360/* Return information about network interface IFNAME, or about all
8361 interfaces (if IFNAME is nil). */
8362static Lisp_Object
8363network_interface_get_info (Lisp_Object ifname)
8364{
8365 ULONG ainfo_len = sizeof (IP_ADAPTER_INFO);
8366 IP_ADAPTER_INFO *adapter, *ainfo = xmalloc (ainfo_len);
8367 DWORD retval = get_adapters_info (ainfo, &ainfo_len);
8368 Lisp_Object res = Qnil;
8369
8370 if (retval == ERROR_BUFFER_OVERFLOW)
8371 {
8372 ainfo = xrealloc (ainfo, ainfo_len);
8373 retval = get_adapters_info (ainfo, &ainfo_len);
8374 }
8375
8376 if (retval == ERROR_SUCCESS)
8377 {
8378 int eth_count = 0, tr_count = 0, fddi_count = 0, ppp_count = 0;
8379 int sl_count = 0, wlan_count = 0, lo_count = 0, ifx_count = 0;
8380 int if_num;
8381 struct sockaddr_in sa;
8382
8383 /* For the below, we need some winsock functions, so make sure
8384 the winsock DLL is loaded. If we cannot successfully load
8385 it, they will have no use of the information we provide,
8386 anyway, so punt. */
8387 if (!winsock_lib && !init_winsock (1))
8388 goto done;
8389
8390 for (adapter = ainfo; adapter; adapter = adapter->Next)
8391 {
8392 char namebuf[MAX_ADAPTER_NAME_LENGTH + 4];
8393 u_long ip_addr;
8394 /* Present Unix-compatible interface names, instead of the
8395 Windows names, which are really GUIDs not readable by
8396 humans. */
8397 static const char *ifmt[] = {
8398 "eth%d", "tr%d", "fddi%d", "ppp%d", "sl%d", "wlan%d",
8399 "lo", "ifx%d"
8400 };
8401 enum {
8402 NONE = -1,
8403 ETHERNET = 0,
8404 TOKENRING = 1,
8405 FDDI = 2,
8406 PPP = 3,
8407 SLIP = 4,
8408 WLAN = 5,
8409 LOOPBACK = 6,
8410 OTHER_IF = 7
8411 } ifmt_idx;
8412
8413 switch (adapter->Type)
8414 {
8415 case MIB_IF_TYPE_ETHERNET:
8416 /* Windows before Vista reports wireless adapters as
8417 Ethernet. Work around by looking at the Description
8418 string. */
8419 if (strstr (adapter->Description, "Wireless "))
8420 {
8421 ifmt_idx = WLAN;
8422 if_num = wlan_count++;
8423 }
8424 else
8425 {
8426 ifmt_idx = ETHERNET;
8427 if_num = eth_count++;
8428 }
8429 break;
8430 case MIB_IF_TYPE_TOKENRING:
8431 ifmt_idx = TOKENRING;
8432 if_num = tr_count++;
8433 break;
8434 case MIB_IF_TYPE_FDDI:
8435 ifmt_idx = FDDI;
8436 if_num = fddi_count++;
8437 break;
8438 case MIB_IF_TYPE_PPP:
8439 ifmt_idx = PPP;
8440 if_num = ppp_count++;
8441 break;
8442 case MIB_IF_TYPE_SLIP:
8443 ifmt_idx = SLIP;
8444 if_num = sl_count++;
8445 break;
8446 case IF_TYPE_IEEE80211:
8447 ifmt_idx = WLAN;
8448 if_num = wlan_count++;
8449 break;
8450 case MIB_IF_TYPE_LOOPBACK:
8451 if (lo_count < 0)
8452 {
8453 ifmt_idx = LOOPBACK;
8454 if_num = lo_count++;
8455 }
8456 else
8457 ifmt_idx = NONE;
8458 break;
8459 default:
8460 ifmt_idx = OTHER_IF;
8461 if_num = ifx_count++;
8462 break;
8463 }
8464 if (ifmt_idx == NONE)
8465 continue;
8466 sprintf (namebuf, ifmt[ifmt_idx], if_num);
8467
8468 sa.sin_family = AF_INET;
8469 ip_addr = sys_inet_addr (adapter->IpAddressList.IpAddress.String);
8470 if (ip_addr == INADDR_NONE)
8471 {
8472 /* Bogus address, skip this interface. */
8473 continue;
8474 }
8475 sa.sin_addr.s_addr = ip_addr;
8476 sa.sin_port = 0;
8477 if (NILP (ifname))
8478 res = Fcons (Fcons (build_string (namebuf),
8479 conv_sockaddr_to_lisp ((struct sockaddr*) &sa,
8480 sizeof (struct sockaddr))),
8481 res);
8482 else if (strcmp (namebuf, SSDATA (ifname)) == 0)
8483 {
8484 Lisp_Object hwaddr = Fmake_vector (make_number (6), Qnil);
8485 register struct Lisp_Vector *p = XVECTOR (hwaddr);
8486 Lisp_Object flags = Qnil;
8487 int n;
8488 u_long net_mask;
8489
8490 /* Flags. We guess most of them by type, since the
8491 Windows flags are different and hard to get by. */
8492 flags = Fcons (intern ("up"), flags);
8493 if (ifmt_idx == ETHERNET || ifmt_idx == WLAN)
8494 {
8495 flags = Fcons (intern ("broadcast"), flags);
8496 flags = Fcons (intern ("multicast"), flags);
8497 }
8498 flags = Fcons (intern ("running"), flags);
8499 if (ifmt_idx == PPP)
8500 {
8501 flags = Fcons (intern ("pointopoint"), flags);
8502 flags = Fcons (intern ("noarp"), flags);
8503 }
8504 if (adapter->HaveWins)
8505 flags = Fcons (intern ("WINS"), flags);
8506 if (adapter->DhcpEnabled)
8507 flags = Fcons (intern ("dynamic"), flags);
8508
8509 res = Fcons (flags, res);
8510
8511 /* Hardware address and its family. */
8512 for (n = 0; n < adapter->AddressLength; n++)
91f2d272 8513 p->contents[n] = make_number ((int) adapter->Address[n]);
3dffe395
EZ		 8514 /* Windows does not support AF_LINK or AF_PACKET family
8515 of addresses. Use an arbitrary family number that is
8516 identical to what GNU/Linux returns. */
8517 res = Fcons (Fcons (make_number (1), hwaddr), res);
8518
8519 /* Network mask. */
8520 sa.sin_family = AF_INET;
8521 net_mask = sys_inet_addr (adapter->IpAddressList.IpMask.String);
8522 if (net_mask != INADDR_NONE)
8523 {
8524 sa.sin_addr.s_addr = net_mask;
8525 sa.sin_port = 0;
8526 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
8527 sizeof (struct sockaddr)),
8528 res);
8529 }
8530 else
8531 res = Fcons (Qnil, res);
8532
8533 sa.sin_family = AF_INET;
8534 if (ip_addr != INADDR_NONE)
8535 {
8536 /* Broadcast address is only reported by
8537 GetAdaptersAddresses, which is of limited
8538 availability. Generate it on our own. */
8539 u_long bcast_addr = (ip_addr & net_mask) | ~net_mask;
8540
8541 sa.sin_addr.s_addr = bcast_addr;
8542 sa.sin_port = 0;
8543 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
8544 sizeof (struct sockaddr)),
8545 res);
8546
8547 /* IP address. */
8548 sa.sin_addr.s_addr = ip_addr;
8549 sa.sin_port = 0;
8550 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
8551 sizeof (struct sockaddr)),
8552 res);
8553 }
8554 else
8555 res = Fcons (Qnil, Fcons (Qnil, res));
8556 }
8557 }
8558 /* GetAdaptersInfo is documented to not report loopback
8559 interfaces, so we generate one out of thin air. */
8560 if (!lo_count)
8561 {
8562 sa.sin_family = AF_INET;
8563 sa.sin_port = 0;
8564 if (NILP (ifname))
8565 {
8566 sa.sin_addr.s_addr = sys_inet_addr ("127.0.0.1");
8567 res = Fcons (Fcons (build_string ("lo"),
8568 conv_sockaddr_to_lisp ((struct sockaddr*) &sa,
8569 sizeof (struct sockaddr))),
8570 res);
8571 }
8572 else if (strcmp (SSDATA (ifname), "lo") == 0)
8573 {
8574 res = Fcons (Fcons (intern ("running"),
8575 Fcons (intern ("loopback"),
8576 Fcons (intern ("up"), Qnil))), Qnil);
8577 /* 772 is what 3 different GNU/Linux systems report for
8578 the loopback interface. */
8579 res = Fcons (Fcons (make_number (772),
8580 Fmake_vector (make_number (6),
8581 make_number (0))),
8582 res);
8583 sa.sin_addr.s_addr = sys_inet_addr ("255.0.0.0");
8584 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
8585 sizeof (struct sockaddr)),
8586 res);
8587 sa.sin_addr.s_addr = sys_inet_addr ("0.0.0.0");
8588 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
8589 sizeof (struct sockaddr)),
8590 res);
8591 sa.sin_addr.s_addr = sys_inet_addr ("127.0.0.1");
8592 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
8593 sizeof (struct sockaddr)),
8594 res);
8595 }
8596
8597 }
8598 }
8599
8600 done:
8601 xfree (ainfo);
8602 return res;
8603}
8604
8605Lisp_Object
8606network_interface_list (void)
8607{
8608 return network_interface_get_info (Qnil);
8609}
8610
8611Lisp_Object
8612network_interface_info (Lisp_Object ifname)
8613{
8614 return network_interface_get_info (ifname);
8615}
8616
8617\f
97a93095
EZ		 8618/* The Windows CRT functions are "optimized for speed", so they don't
8619 check for timezone and DST changes if they were last called less
8620 than 1 minute ago (see http://support.microsoft.com/kb/821231). So
8621 all Emacs features that repeatedly call time functions (e.g.,
8622 display-time) are in real danger of missing timezone and DST
8623 changes. Calling tzset before each localtime call fixes that. */
8624struct tm *
8625sys_localtime (const time_t *t)
8626{
8627 tzset ();
8628 return localtime (t);
8629}
8630
0898ca10
JB		 8631
8632\f
d07ff9db
CY		 8633/* Try loading LIBRARY_ID from the file(s) specified in
8634 Vdynamic_library_alist. If the library is loaded successfully,
8635 return the handle of the DLL, and record the filename in the
8636 property :loaded-from of LIBRARY_ID. If the library could not be
8637 found, or when it was already loaded (because the handle is not
8638 recorded anywhere, and so is lost after use), return NULL.
8639
8640 We could also save the handle in :loaded-from, but currently
8641 there's no use case for it. */
0898ca10 8642HMODULE
d07ff9db 8643w32_delayed_load (Lisp_Object library_id)
0898ca10 8644{
a868f601 8645 HMODULE dll_handle = NULL;
0898ca10
JB		 8646
8647 CHECK_SYMBOL (library_id);
8648
d07ff9db
CY		 8649 if (CONSP (Vdynamic_library_alist)
8650 && NILP (Fassq (library_id, Vlibrary_cache)))
0898ca10
JB		 8651 {
8652 Lisp_Object found = Qnil;
d07ff9db 8653 Lisp_Object dlls = Fassq (library_id, Vdynamic_library_alist);
0898ca10
JB		 8654
8655 if (CONSP (dlls))
8656 for (dlls = XCDR (dlls); CONSP (dlls); dlls = XCDR (dlls))
8657 {
a868f601
EZ		 8658 Lisp_Object dll = XCAR (dlls);
8659 char name[MAX_UTF8_PATH];
8660 DWORD res = -1;
8661
8662 CHECK_STRING (dll);
8663 dll = ENCODE_FILE (dll);
8664 if (w32_unicode_filenames)
8665 {
8666 wchar_t name_w[MAX_PATH];
8667
8668 filename_to_utf16 (SSDATA (dll), name_w);
8669 dll_handle = LoadLibraryW (name_w);
8670 if (dll_handle)
8671 {
8672 res = GetModuleFileNameW (dll_handle, name_w,
8673 sizeof (name_w));
8674 if (res > 0)
8675 filename_from_utf16 (name_w, name);
8676 }
8677 }
8678 else
8679 {
8680 char name_a[MAX_PATH];
8681
8682 filename_to_ansi (SSDATA (dll), name_a);
8683 dll_handle = LoadLibraryA (name_a);
8684 if (dll_handle)
8685 {
8686 res = GetModuleFileNameA (dll_handle, name_a,
8687 sizeof (name_a));
8688 if (res > 0)
8689 filename_from_ansi (name_a, name);
8690 }
8691 }
8692 if (dll_handle)
8693 {
8694 ptrdiff_t len = strlen (name);
8695 found = Fcons (dll,
8696 (res > 0)
8697 /* Possibly truncated */
8698 ? make_specified_string (name, -1, len, 1)
8699 : Qnil);
8700 break;
8701 }
8702 }
0898ca10
JB		 8703
8704 Fput (library_id, QCloaded_from, found);
8705 }
8706
a868f601 8707 return dll_handle;
0898ca10
JB		 8708}
8709
8710\f
76151e2c 8711void
b56ceb92 8712check_windows_init_file (void)
f52eb3ef 8713{
f52eb3ef
GV		 8714 /* A common indication that Emacs is not installed properly is when
8715 it cannot find the Windows installation file. If this file does
8716 not exist in the expected place, tell the user. */
8717
c7aa8333
EZ		 8718 if (!noninteractive && !inhibit_window_system
8719 /* Vload_path is not yet initialized when we are loading
8720 loadup.el. */
8721 && NILP (Vpurify_flag))
d54abccd 8722 {
d54abccd
GV		 8723 Lisp_Object init_file;
8724 int fd;
f52eb3ef 8725
a868f601
EZ		 8726 /* Implementation note: this function runs early during Emacs
8727 startup, before startup.el is run. So Vload_path is still in
080fd649
EZ		 8728 its initial unibyte form, but it holds UTF-8 encoded file
8729 names, since init_callproc was already called. So we do not
8730 need to ENCODE_FILE here, but we do need to convert the file
8731 names from UTF-8 to ANSI. */
d54abccd 8732 init_file = build_string ("term/w32-win");
1f41ee56 8733 fd = openp (Vload_path, init_file, Fget_load_suffixes (), NULL, Qnil, 0);
177c0ea7 8734 if (fd < 0)
d54abccd 8735 {
76151e2c 8736 Lisp_Object load_path_print = Fprin1_to_string (Vload_path, Qnil);
d5db4077
KR		 8737 char *init_file_name = SDATA (init_file);
8738 char *load_path = SDATA (load_path_print);
acc23b87
KS		 8739 char *buffer = alloca (1024
8740 + strlen (init_file_name)
8741 + strlen (load_path));
080fd649
EZ		 8742 char *msg = buffer;
8743 int needed;
d54abccd 8744
177c0ea7 8745 sprintf (buffer,
d54abccd
GV		 8746 "The Emacs Windows initialization file \"%s.el\" "
8747 "could not be found in your Emacs installation. "
8748 "Emacs checked the following directories for this file:\n"
8749 "\n%s\n\n"
8750 "When Emacs cannot find this file, it usually means that it "
8751 "was not installed properly, or its distribution file was "
8752 "not unpacked properly.\nSee the README.W32 file in the "
8753 "top-level Emacs directory for more information.",
8754 init_file_name, load_path);
829f4f22
EZ		 8755 needed = pMultiByteToWideChar (CP_UTF8, MB_ERR_INVALID_CHARS, buffer,
8756 -1, NULL, 0);
080fd649
EZ		 8757 if (needed > 0)
8758 {
8759 wchar_t *msg_w = alloca ((needed + 1) * sizeof (wchar_t));
8760
829f4f22
EZ		 8761 pMultiByteToWideChar (CP_UTF8, MB_ERR_INVALID_CHARS, buffer, -1,
8762 msg_w, needed);
8763 needed = pWideCharToMultiByte (CP_ACP, 0, msg_w, -1,
8764 NULL, 0, NULL, NULL);
080fd649
EZ		 8765 if (needed > 0)
8766 {
8767 char *msg_a = alloca (needed + 1);
8768
829f4f22
EZ		 8769 pWideCharToMultiByte (CP_ACP, 0, msg_w, -1, msg_a, needed,
8770 NULL, NULL);
080fd649
EZ		 8771 msg = msg_a;
8772 }
8773 }
d54abccd 8774 MessageBox (NULL,
080fd649 8775 msg,
d54abccd
GV		 8776 "Emacs Abort Dialog",
8777 MB_OK | MB_ICONEXCLAMATION | MB_TASKMODAL);
1088b922 8778 /* Use the low-level system abort. */
d54abccd
GV		 8779 abort ();
8780 }
8781 else
8782 {
a302c7ae 8783 _close (fd);
d54abccd 8784 }
f52eb3ef 8785 }
f52eb3ef 8786}
480b0c5b
GV		 8787
8788void
16b22fef 8789term_ntproc (int ignored)
480b0c5b 8790{
16b22fef 8791 (void)ignored;
c06c382a
EZ		 8792
8793 term_timers ();
8794
480b0c5b
GV		 8795 /* shutdown the socket interface if necessary */
8796 term_winsock ();
52c7f9ee
JR		 8797
8798 term_w32select ();
480b0c5b
GV		 8799}
8800
8801void
16b22fef 8802init_ntproc (int dumping)
480b0c5b 8803{
c06c382a
EZ		 8804 sigset_t initial_mask = 0;
8805
e1dbe924 8806 /* Initialize the socket interface now if available and requested by
f249a012 8807 the user by defining PRELOAD_WINSOCK; otherwise loading will be
fbd6baed 8808 delayed until open-network-stream is called (w32-has-winsock can
f249a012
RS		 8809 also be used to dynamically load or reload winsock).
8810
8811 Conveniently, init_environment is called before us, so
8812 PRELOAD_WINSOCK can be set in the registry. */
8813
8814 /* Always initialize this correctly. */
8815 winsock_lib = NULL;
8816
8817 if (getenv ("PRELOAD_WINSOCK") != NULL)
8818 init_winsock (TRUE);
480b0c5b
GV		 8819
8820 /* Initial preparation for subprocess support: replace our standard
8821 handles with non-inheritable versions. */
8822 {
8823 HANDLE parent;
8824 HANDLE stdin_save = INVALID_HANDLE_VALUE;
8825 HANDLE stdout_save = INVALID_HANDLE_VALUE;
8826 HANDLE stderr_save = INVALID_HANDLE_VALUE;
8827
8828 parent = GetCurrentProcess ();
8829
8830 /* ignore errors when duplicating and closing; typically the
8831 handles will be invalid when running as a gui program. */
177c0ea7
JB		 8832 DuplicateHandle (parent,
8833 GetStdHandle (STD_INPUT_HANDLE),
480b0c5b 8834 parent,
177c0ea7
JB		 8835 &stdin_save,
8836 0,
8837 FALSE,
480b0c5b 8838 DUPLICATE_SAME_ACCESS);
177c0ea7 8839
480b0c5b
GV		 8840 DuplicateHandle (parent,
8841 GetStdHandle (STD_OUTPUT_HANDLE),
8842 parent,
8843 &stdout_save,
8844 0,
8845 FALSE,
8846 DUPLICATE_SAME_ACCESS);
177c0ea7 8847
480b0c5b
GV		 8848 DuplicateHandle (parent,
8849 GetStdHandle (STD_ERROR_HANDLE),
8850 parent,
8851 &stderr_save,
8852 0,
8853 FALSE,
8854 DUPLICATE_SAME_ACCESS);
177c0ea7 8855
480b0c5b
GV		 8856 fclose (stdin);
8857 fclose (stdout);
8858 fclose (stderr);
8859
8860 if (stdin_save != INVALID_HANDLE_VALUE)
62aba0d4 8861 _open_osfhandle ((intptr_t) stdin_save, O_TEXT);
480b0c5b 8862 else
76b3903d
GV		 8863 _open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY);
8864 _fdopen (0, "r");
480b0c5b
GV		 8865
8866 if (stdout_save != INVALID_HANDLE_VALUE)
62aba0d4 8867 _open_osfhandle ((intptr_t) stdout_save, O_TEXT);
480b0c5b 8868 else
76b3903d
GV		 8869 _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY);
8870 _fdopen (1, "w");
480b0c5b
GV		 8871
8872 if (stderr_save != INVALID_HANDLE_VALUE)
62aba0d4 8873 _open_osfhandle ((intptr_t) stderr_save, O_TEXT);
480b0c5b 8874 else
76b3903d
GV		 8875 _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY);
8876 _fdopen (2, "w");
480b0c5b
GV		 8877 }
8878
8879 /* unfortunately, atexit depends on implementation of malloc */
8880 /* atexit (term_ntproc); */
16b22fef 8881 if (!dumping)
c06c382a
EZ		 8882 {
8883 /* Make sure we start with all signals unblocked. */
8884 sigprocmask (SIG_SETMASK, &initial_mask, NULL);
8885 signal (SIGABRT, term_ntproc);
8886 }
8887 init_timers ();
76b3903d
GV		 8888
8889 /* determine which drives are fixed, for GetCachedVolumeInformation */
8890 {
8891 /* GetDriveType must have trailing backslash. */
8892 char drive[] = "A:\\";
8893
8894 /* Loop over all possible drive letters */
8895 while (*drive <= 'Z')
8896 {
8897 /* Record if this drive letter refers to a fixed drive. */
177c0ea7 8898 fixed_drives[DRIVE_INDEX (*drive)] =
76b3903d
GV		 8899 (GetDriveType (drive) == DRIVE_FIXED);
8900
8901 (*drive)++;
8902 }
a302c7ae
AI		 8903
8904 /* Reset the volume info cache. */
8905 volume_cache = NULL;
76b3903d 8906 }
480b0c5b
GV		 8907}
8908
a8c3a596
JR		 8909/*
8910 shutdown_handler ensures that buffers' autosave files are
8911 up to date when the user logs off, or the system shuts down.
8912*/
bedf4aab 8913static BOOL WINAPI
ed3751c8 8914shutdown_handler (DWORD type)
a8c3a596
JR		 8915{
8916 /* Ctrl-C and Ctrl-Break are already suppressed, so don't handle them. */
8917 if (type == CTRL_CLOSE_EVENT /* User closes console window. */
8918 || type == CTRL_LOGOFF_EVENT /* User logs off. */
8919 || type == CTRL_SHUTDOWN_EVENT) /* User shutsdown. */
8920 {
8921 /* Shut down cleanly, making sure autosave files are up to date. */
1882aa38 8922 shut_down_emacs (0, Qnil);
a8c3a596
JR		 8923 }
8924
7046f191 8925 /* Allow other handlers to handle this signal. */
a8c3a596
JR		 8926 return FALSE;
8927}
8928
5197f0c2
EZ		 8929/* On Windows 9X, load UNICOWS.DLL and return its handle, or die. On
8930 NT, return a handle to GDI32.DLL. */
8931HANDLE
8932maybe_load_unicows_dll (void)
8933{
8934 if (os_subtype == OS_9X)
8935 {
8936 HANDLE ret = LoadLibrary ("Unicows.dll");
8937 if (ret)
829f4f22
EZ		 8938 {
8939 /* These two functions are present on Windows 9X as stubs
8940 that always fail. We need the real implementations from
8941 UNICOWS.DLL, so we must call these functions through
8942 pointers, and assign the correct addresses to these
8943 pointers at program startup (see emacs.c, which calls
8944 this function early on). */
8945 pMultiByteToWideChar = GetProcAddress (ret, "MultiByteToWideChar");
8946 pWideCharToMultiByte = GetProcAddress (ret, "WideCharToMultiByte");
8947 return ret;
8948 }
5197f0c2
EZ		 8949 else
8950 {
8951 int button;
8952
8953 button = MessageBox (NULL,
8954 "Emacs cannot load the UNICOWS.DLL library.\n"
8955 "This library is essential for using Emacs\n"
8956 "on this system. You need to install it.\n\n"
8957 "Emacs will exit when you click OK.",
8958 "Emacs cannot load UNICOWS.DLL",
8959 MB_ICONERROR | MB_TASKMODAL
8960 | MB_SETFOREGROUND | MB_OK);
8961 switch (button)
8962 {
8963 case IDOK:
8964 default:
8965 exit (1);
8966 }
8967 }
8968 }
8969 else
829f4f22
EZ		 8970 {
8971 /* On NT family of Windows, these two functions are always
8972 linked in, so we just assign their addresses to the 2
8973 pointers; no need for the LoadLibrary dance. */
8974 pMultiByteToWideChar = MultiByteToWideChar;
8975 pWideCharToMultiByte = WideCharToMultiByte;
8976 return LoadLibrary ("Gdi32.dll");
8977 }
5197f0c2
EZ		 8978}
8979
9785d95b
BK		 8980/*
8981 globals_of_w32 is used to initialize those global variables that
8982 must always be initialized on startup even when the global variable
8983 initialized is non zero (see the function main in emacs.c).
8984*/
9bfb11f9 8985void
b56ceb92 8986globals_of_w32 (void)
9785d95b 8987{
74258518
JR		 8988 HMODULE kernel32 = GetModuleHandle ("kernel32.dll");
8989
8990 get_process_times_fn = (GetProcessTimes_Proc)
8991 GetProcAddress (kernel32, "GetProcessTimes");
8992
cd3520a4 8993 DEFSYM (QCloaded_from, ":loaded-from");
0898ca10 8994
9785d95b
BK		 8995 g_b_init_is_windows_9x = 0;
8996 g_b_init_open_process_token = 0;
8997 g_b_init_get_token_information = 0;
8998 g_b_init_lookup_account_sid = 0;
9d95a291
EZ		 8999 g_b_init_get_sid_sub_authority = 0;
9000 g_b_init_get_sid_sub_authority_count = 0;
6dad7178 9001 g_b_init_get_security_info = 0;
df87c56c
EZ		 9002 g_b_init_get_file_security_w = 0;
9003 g_b_init_get_file_security_a = 0;
8aaaec6b
EZ		 9004 g_b_init_get_security_descriptor_owner = 0;
9005 g_b_init_get_security_descriptor_group = 0;
9006 g_b_init_is_valid_sid = 0;
7c80d5ec
EZ		 9007 g_b_init_create_toolhelp32_snapshot = 0;
9008 g_b_init_process32_first = 0;
9009 g_b_init_process32_next = 0;
9010 g_b_init_open_thread_token = 0;
9011 g_b_init_impersonate_self = 0;
9012 g_b_init_revert_to_self = 0;
9013 g_b_init_get_process_memory_info = 0;
9014 g_b_init_get_process_working_set_size = 0;
9015 g_b_init_global_memory_status = 0;
9016 g_b_init_global_memory_status_ex = 0;
f8b35b24
EZ		 9017 g_b_init_equal_sid = 0;
9018 g_b_init_copy_sid = 0;
9019 g_b_init_get_length_sid = 0;
ad9e2d54
EZ		 9020 g_b_init_get_native_system_info = 0;
9021 g_b_init_get_system_times = 0;
eeccd06f
EZ		 9022 g_b_init_create_symbolic_link_w = 0;
9023 g_b_init_create_symbolic_link_a = 0;
66447e07
EZ		 9024 g_b_init_get_security_descriptor_dacl = 0;
9025 g_b_init_convert_sd_to_sddl = 0;
9026 g_b_init_convert_sddl_to_sd = 0;
9027 g_b_init_is_valid_security_descriptor = 0;
66124e61
EZ		 9028 g_b_init_set_file_security_w = 0;
9029 g_b_init_set_file_security_a = 0;
0bbd0e0b
FP		 9030 g_b_init_set_named_security_info_w = 0;
9031 g_b_init_set_named_security_info_a = 0;
3dffe395 9032 g_b_init_get_adapters_info = 0;
ad9e2d54 9033 num_of_processors = 0;
a8c3a596
JR		 9034 /* The following sets a handler for shutdown notifications for
9035 console apps. This actually applies to Emacs in both console and
9036 GUI modes, since we had to fool windows into thinking emacs is a
9037 console application to get console mode to work. */
ed3751c8 9038 SetConsoleCtrlHandler (shutdown_handler, TRUE);
8aaaec6b
EZ		 9039
9040 /* "None" is the default group name on standalone workstations. */
9041 strcpy (dflt_group_name, "None");
5c207910
EZ		 9042
9043 /* Reset, in case it has some value inherited from dump time. */
9044 w32_stat_get_owner_group = 0;
03d58cca
EZ		 9045
9046 /* If w32_unicode_filenames is non-zero, we will be using Unicode
9047 (a.k.a. "wide") APIs to invoke functions that accept file
9048 names. */
9049 if (is_windows_9x ())
9050 w32_unicode_filenames = 0;
9051 else
9052 w32_unicode_filenames = 1;
9785d95b
BK		 9053}
9054
d888760c 9055/* For make-serial-process */
b56ceb92 9056int
4e604a5d 9057serial_open (Lisp_Object port_obj)
d888760c 9058{
4e604a5d 9059 char *port = SSDATA (port_obj);
d888760c
GM		 9060 HANDLE hnd;
9061 child_process *cp;
9062 int fd = -1;
9063
9064 hnd = CreateFile (port, GENERIC_READ | GENERIC_WRITE, 0, 0,
9065 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
9066 if (hnd == INVALID_HANDLE_VALUE)
9067 error ("Could not open %s", port);
62aba0d4 9068 fd = (int) _open_osfhandle ((intptr_t) hnd, 0);
d888760c
GM		 9069 if (fd == -1)
9070 error ("Could not open %s", port);
9071
9072 cp = new_child ();
9073 if (!cp)
9074 error ("Could not create child process");
9075 cp->fd = fd;
9076 cp->status = STATUS_READ_ACKNOWLEDGED;
9077 fd_info[ fd ].hnd = hnd;
9078 fd_info[ fd ].flags |=
9079 FILE_READ | FILE_WRITE | FILE_BINARY | FILE_SERIAL;
9080 if (fd_info[ fd ].cp != NULL)
9081 {
9082 error ("fd_info[fd = %d] is already in use", fd);
9083 }
9084 fd_info[ fd ].cp = cp;
9085 cp->ovl_read.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL);
9086 if (cp->ovl_read.hEvent == NULL)
9087 error ("Could not create read event");
9088 cp->ovl_write.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL);
9089 if (cp->ovl_write.hEvent == NULL)
9090 error ("Could not create write event");
9091
9092 return fd;
9093}
9094
9095/* For serial-process-configure */
9096void
9d4f32e8 9097serial_configure (struct Lisp_Process *p, Lisp_Object contact)
d888760c
GM		 9098{
9099 Lisp_Object childp2 = Qnil;
9100 Lisp_Object tem = Qnil;
9101 HANDLE hnd;
9102 DCB dcb;
9103 COMMTIMEOUTS ct;
9104 char summary[4] = "???"; /* This usually becomes "8N1". */
9105
9106 if ((fd_info[ p->outfd ].flags & FILE_SERIAL) == 0)
9107 error ("Not a serial process");
9108 hnd = fd_info[ p->outfd ].hnd;
9109
4d2b044c 9110 childp2 = Fcopy_sequence (p->childp);
d888760c
GM		 9111
9112 /* Initialize timeouts for blocking read and blocking write. */
9113 if (!GetCommTimeouts (hnd, &ct))
9114 error ("GetCommTimeouts() failed");
9115 ct.ReadIntervalTimeout = 0;
9116 ct.ReadTotalTimeoutMultiplier = 0;
9117 ct.ReadTotalTimeoutConstant = 0;
9118 ct.WriteTotalTimeoutMultiplier = 0;
9119 ct.WriteTotalTimeoutConstant = 0;
9120 if (!SetCommTimeouts (hnd, &ct))
9121 error ("SetCommTimeouts() failed");
9122 /* Read port attributes and prepare default configuration. */
9123 memset (&dcb, 0, sizeof (dcb));
9124 dcb.DCBlength = sizeof (DCB);
9125 if (!GetCommState (hnd, &dcb))
9126 error ("GetCommState() failed");
9127 dcb.fBinary = TRUE;
9128 dcb.fNull = FALSE;
9129 dcb.fAbortOnError = FALSE;
9130 /* dcb.XonLim and dcb.XoffLim are set by GetCommState() */
9131 dcb.ErrorChar = 0;
9132 dcb.EofChar = 0;
9133 dcb.EvtChar = 0;
9134
9135 /* Configure speed. */
9136 if (!NILP (Fplist_member (contact, QCspeed)))
9137 tem = Fplist_get (contact, QCspeed);
9138 else
4d2b044c 9139 tem = Fplist_get (p->childp, QCspeed);
d888760c
GM		 9140 CHECK_NUMBER (tem);
9141 dcb.BaudRate = XINT (tem);
9142 childp2 = Fplist_put (childp2, QCspeed, tem);
9143
9144 /* Configure bytesize. */
9145 if (!NILP (Fplist_member (contact, QCbytesize)))
9146 tem = Fplist_get (contact, QCbytesize);
9147 else
4d2b044c 9148 tem = Fplist_get (p->childp, QCbytesize);
d888760c
GM		 9149 if (NILP (tem))
9150 tem = make_number (8);
9151 CHECK_NUMBER (tem);
9152 if (XINT (tem) != 7 && XINT (tem) != 8)
9153 error (":bytesize must be nil (8), 7, or 8");
9154 dcb.ByteSize = XINT (tem);
9155 summary[0] = XINT (tem) + '0';
9156 childp2 = Fplist_put (childp2, QCbytesize, tem);
9157
9158 /* Configure parity. */
9159 if (!NILP (Fplist_member (contact, QCparity)))
9160 tem = Fplist_get (contact, QCparity);
9161 else
4d2b044c 9162 tem = Fplist_get (p->childp, QCparity);
d888760c
GM		 9163 if (!NILP (tem) && !EQ (tem, Qeven) && !EQ (tem, Qodd))
9164 error (":parity must be nil (no parity), `even', or `odd'");
9165 dcb.fParity = FALSE;
9166 dcb.Parity = NOPARITY;
9167 dcb.fErrorChar = FALSE;
9168 if (NILP (tem))
9169 {
9170 summary[1] = 'N';
9171 }
9172 else if (EQ (tem, Qeven))
9173 {
9174 summary[1] = 'E';
9175 dcb.fParity = TRUE;
9176 dcb.Parity = EVENPARITY;
9177 dcb.fErrorChar = TRUE;
9178 }
9179 else if (EQ (tem, Qodd))
9180 {
9181 summary[1] = 'O';
9182 dcb.fParity = TRUE;
9183 dcb.Parity = ODDPARITY;
9184 dcb.fErrorChar = TRUE;
9185 }
9186 childp2 = Fplist_put (childp2, QCparity, tem);
9187
9188 /* Configure stopbits. */
9189 if (!NILP (Fplist_member (contact, QCstopbits)))
9190 tem = Fplist_get (contact, QCstopbits);
9191 else
4d2b044c 9192 tem = Fplist_get (p->childp, QCstopbits);
d888760c
GM		 9193 if (NILP (tem))
9194 tem = make_number (1);
9195 CHECK_NUMBER (tem);
9196 if (XINT (tem) != 1 && XINT (tem) != 2)
9197 error (":stopbits must be nil (1 stopbit), 1, or 2");
9198 summary[2] = XINT (tem) + '0';
9199 if (XINT (tem) == 1)
9200 dcb.StopBits = ONESTOPBIT;
9201 else if (XINT (tem) == 2)
9202 dcb.StopBits = TWOSTOPBITS;
9203 childp2 = Fplist_put (childp2, QCstopbits, tem);
9204
9205 /* Configure flowcontrol. */
9206 if (!NILP (Fplist_member (contact, QCflowcontrol)))
9207 tem = Fplist_get (contact, QCflowcontrol);
9208 else
4d2b044c 9209 tem = Fplist_get (p->childp, QCflowcontrol);
d888760c
GM		 9210 if (!NILP (tem) && !EQ (tem, Qhw) && !EQ (tem, Qsw))
9211 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
9212 dcb.fOutxCtsFlow = FALSE;
9213 dcb.fOutxDsrFlow = FALSE;
9214 dcb.fDtrControl = DTR_CONTROL_DISABLE;
9215 dcb.fDsrSensitivity = FALSE;
9216 dcb.fTXContinueOnXoff = FALSE;
9217 dcb.fOutX = FALSE;
9218 dcb.fInX = FALSE;
9219 dcb.fRtsControl = RTS_CONTROL_DISABLE;
9220 dcb.XonChar = 17; /* Control-Q */
9221 dcb.XoffChar = 19; /* Control-S */
9222 if (NILP (tem))
9223 {
9224 /* Already configured. */
9225 }
9226 else if (EQ (tem, Qhw))
9227 {
9228 dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
9229 dcb.fOutxCtsFlow = TRUE;
9230 }
9231 else if (EQ (tem, Qsw))
9232 {
9233 dcb.fOutX = TRUE;
9234 dcb.fInX = TRUE;
9235 }
9236 childp2 = Fplist_put (childp2, QCflowcontrol, tem);
9237
9238 /* Activate configuration. */
9239 if (!SetCommState (hnd, &dcb))
9240 error ("SetCommState() failed");
9241
9242 childp2 = Fplist_put (childp2, QCsummary, build_string (summary));
6a09a33b 9243 pset_childp (p, childp2);
d888760c
GM		 9244}
9245
e061a11b
TZ		 9246#ifdef HAVE_GNUTLS
9247
9248ssize_t
9249emacs_gnutls_pull (gnutls_transport_ptr_t p, void* buf, size_t sz)
9250{
d78cf5ed 9251 int n, err;
e061a11b 9252 SELECT_TYPE fdset;
43aac990 9253 struct timespec timeout;
e061a11b
TZ		 9254 struct Lisp_Process *process = (struct Lisp_Process *)p;
9255 int fd = process->infd;
9256
d78cf5ed 9257 n = sys_read (fd, (char*)buf, sz);
e061a11b 9258
d78cf5ed
CB		 9259 if (n >= 0)
9260 return n;
e061a11b 9261
d78cf5ed 9262 err = errno;
e061a11b 9263
d78cf5ed
CB		 9264 /* Translate the WSAEWOULDBLOCK alias EWOULDBLOCK to EAGAIN. */
9265 if (err == EWOULDBLOCK)
9266 err = EAGAIN;
e061a11b 9267
d78cf5ed 9268 emacs_gnutls_transport_set_errno (process->gnutls_state, err);
e061a11b 9269
d78cf5ed 9270 return -1;
e061a11b 9271}
ab5796a9 9272
e061a11b
TZ		 9273ssize_t
9274emacs_gnutls_push (gnutls_transport_ptr_t p, const void* buf, size_t sz)
9275{
9276 struct Lisp_Process *process = (struct Lisp_Process *)p;
42ce4c63 9277 int fd = process->outfd;
5e617bc2 9278 ssize_t n = sys_write (fd, buf, sz);
e061a11b
TZ		 9279
9280 /* 0 or more bytes written means everything went fine. */
9281 if (n >= 0)
9282 return n;
9283
9284 /* Negative bytes written means we got an error in errno.
9285 Translate the WSAEWOULDBLOCK alias EWOULDBLOCK to EAGAIN. */
0898ca10
JB		 9286 emacs_gnutls_transport_set_errno (process->gnutls_state,
9287 errno == EWOULDBLOCK ? EAGAIN : errno);
e061a11b
TZ		 9288
9289 return -1;
9290}
9291#endif /* HAVE_GNUTLS */
9292
9293/* end of w32.c */
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