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sys_rename_replace converted.
[bpt/emacs.git] / src / w32.c
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b46a6a83 1/* Utility and Unix shadow routines for GNU Emacs on the Microsoft Windows API.
ab422c4d 2 Copyright (C) 1994-1995, 2000-2013 Free Software Foundation, Inc.
95ed0025 3
3b7ad313
EN		 4This file is part of GNU Emacs.
5
9ec0b715 6GNU Emacs is free software: you can redistribute it and/or modify
3b7ad313 7it under the terms of the GNU General Public License as published by
9ec0b715
GM		 8the Free Software Foundation, either version 3 of the License, or
9(at your option) any later version.
3b7ad313
EN		 10
11GNU Emacs is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
9ec0b715 17along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
95ed0025 18
9ec0b715 19/*
95ed0025
RS		 20 Geoff Voelker (voelker@cs.washington.edu) 7-29-94
21*/
279066b2
EZ		 22
23#include <mingw_time.h>
76b3903d 24#include <stddef.h> /* for offsetof */
95ed0025
RS		 25#include <stdlib.h>
26#include <stdio.h>
ad9e2d54 27#include <float.h> /* for DBL_EPSILON */
95ed0025 28#include <io.h>
480b0c5b 29#include <errno.h>
95ed0025
RS		 30#include <fcntl.h>
31#include <ctype.h>
480b0c5b 32#include <signal.h>
b3308d2e 33#include <sys/file.h>
8f5e14c8 34#include <time.h> /* must be before nt/inc/sys/time.h, for MinGW64 */
480b0c5b 35#include <sys/time.h>
16bb7578 36#include <sys/utime.h>
7c80d5ec 37#include <math.h>
480b0c5b
GV		 38
39/* must include CRT headers *before* config.h */
4838e624 40
4838e624 41#include <config.h>
6ee4509a 42#include <mbstring.h> /* for _mbspbrk, _mbslwr, _mbsrchr, ... */
4838e624 43
480b0c5b
GV		 44#undef access
45#undef chdir
46#undef chmod
47#undef creat
48#undef ctime
49#undef fopen
50#undef link
51#undef mkdir
480b0c5b
GV		 52#undef open
53#undef rename
54#undef rmdir
55#undef unlink
56
57#undef close
58#undef dup
59#undef dup2
60#undef pipe
61#undef read
62#undef write
95ed0025 63
d8fcc1b9
AI		 64#undef strerror
65
97a93095
EZ		 66#undef localtime
67
95ed0025 68#include "lisp.h"
7d9fb4de 69#include "epaths.h" /* for SHELL */
95ed0025
RS		 70
71#include <pwd.h>
3d19b645 72#include <grp.h>
95ed0025 73
a18d7de6
EZ		 74/* MinGW64 (_W64) defines these in its _mingw.h. */
75#if defined(__GNUC__) && !defined(_W64)
971bce75
AI		 76#define _ANONYMOUS_UNION
77#define _ANONYMOUS_STRUCT
78#endif
480b0c5b 79#include <windows.h>
b8526f6e
EZ		 80/* Some versions of compiler define MEMORYSTATUSEX, some don't, so we
81 use a different name to avoid compilation problems. */
82typedef struct _MEMORY_STATUS_EX {
bedf4aab
JB		 83 DWORD dwLength;
84 DWORD dwMemoryLoad;
85 DWORDLONG ullTotalPhys;
86 DWORDLONG ullAvailPhys;
87 DWORDLONG ullTotalPageFile;
88 DWORDLONG ullAvailPageFile;
89 DWORDLONG ullTotalVirtual;
90 DWORDLONG ullAvailVirtual;
91 DWORDLONG ullAvailExtendedVirtual;
b8526f6e 92} MEMORY_STATUS_EX,*LPMEMORY_STATUS_EX;
7c80d5ec 93
55902276
EZ		 94/* These are here so that GDB would know about these data types. This
95 allows to attach GDB to Emacs when a fatal exception is triggered
96 and Windows pops up the "application needs to be closed" dialog.
97 At that point, _gnu_exception_handler, the top-level exception
98 handler installed by the MinGW startup code, is somewhere on the
99 call-stack of the main thread, so going to that call frame and
100 looking at the argument to _gnu_exception_handler, which is a
101 PEXCEPTION_POINTERS pointer, can reveal the exception code
102 (excptr->ExceptionRecord->ExceptionCode) and the address where the
103 exception happened (excptr->ExceptionRecord->ExceptionAddress), as
104 well as some additional information specific to the exception. */
105PEXCEPTION_POINTERS excptr;
106PEXCEPTION_RECORD excprec;
107PCONTEXT ctxrec;
108
634d3003 109#include <lmcons.h>
2d5324c5 110#include <shlobj.h>
00b3b7b3 111
7c80d5ec
EZ		 112#include <tlhelp32.h>
113#include <psapi.h>
a6fc3b5c 114#ifndef _MSC_VER
69e847be 115#include <w32api.h>
a6fc3b5c 116#endif
a18d7de6 117#if _WIN32_WINNT < 0x0500
5e617bc2 118#if !defined (__MINGW32__) || __W32API_MAJOR_VERSION < 3 || (__W32API_MAJOR_VERSION == 3 && __W32API_MINOR_VERSION < 15)
7c80d5ec 119/* This either is not in psapi.h or guarded by higher value of
a6d3e72e 120 _WIN32_WINNT than what we use. w32api supplied with MinGW 3.15
69e847be 121 defines it in psapi.h */
7c80d5ec 122typedef struct _PROCESS_MEMORY_COUNTERS_EX {
cb576b5c
FP		 123 DWORD cb;
124 DWORD PageFaultCount;
125 SIZE_T PeakWorkingSetSize;
126 SIZE_T WorkingSetSize;
127 SIZE_T QuotaPeakPagedPoolUsage;
128 SIZE_T QuotaPagedPoolUsage;
129 SIZE_T QuotaPeakNonPagedPoolUsage;
130 SIZE_T QuotaNonPagedPoolUsage;
131 SIZE_T PagefileUsage;
132 SIZE_T PeakPagefileUsage;
133 SIZE_T PrivateUsage;
7c80d5ec 134} PROCESS_MEMORY_COUNTERS_EX,*PPROCESS_MEMORY_COUNTERS_EX;
69e847be 135#endif
a18d7de6 136#endif
7c80d5ec 137
6dad7178
EZ		 138#include <winioctl.h>
139#include <aclapi.h>
66447e07
EZ		 140#include <sddl.h>
141
142#include <sys/acl.h>
143
144/* This is not in MinGW's sddl.h (but they are in MSVC headers), so we
145 define them by hand if not already defined. */
146#ifndef SDDL_REVISION_1
147#define SDDL_REVISION_1 1
148#endif /* SDDL_REVISION_1 */
6dad7178 149
c6e72e17
EZ		 150#if defined(_MSC_VER) || defined(_W64)
151/* MSVC and MinGW64 don't provide the definition of
152 REPARSE_DATA_BUFFER and the associated macros, except on ntifs.h,
153 which cannot be included because it triggers conflicts with other
154 Windows API headers. So we define it here by hand. */
6dad7178
EZ		 155
156typedef struct _REPARSE_DATA_BUFFER {
157 ULONG ReparseTag;
158 USHORT ReparseDataLength;
159 USHORT Reserved;
160 union {
161 struct {
162 USHORT SubstituteNameOffset;
163 USHORT SubstituteNameLength;
164 USHORT PrintNameOffset;
165 USHORT PrintNameLength;
166 ULONG Flags;
167 WCHAR PathBuffer[1];
168 } SymbolicLinkReparseBuffer;
169 struct {
170 USHORT SubstituteNameOffset;
171 USHORT SubstituteNameLength;
172 USHORT PrintNameOffset;
173 USHORT PrintNameLength;
174 WCHAR PathBuffer[1];
175 } MountPointReparseBuffer;
176 struct {
177 UCHAR DataBuffer[1];
178 } GenericReparseBuffer;
179 } DUMMYUNIONNAME;
180} REPARSE_DATA_BUFFER, *PREPARSE_DATA_BUFFER;
181
c7b36b95 182#ifndef FILE_DEVICE_FILE_SYSTEM
88c4a13c 183#define FILE_DEVICE_FILE_SYSTEM 9
c7b36b95
FP		 184#endif
185#ifndef METHOD_BUFFERED
88c4a13c 186#define METHOD_BUFFERED 0
c7b36b95
FP		 187#endif
188#ifndef FILE_ANY_ACCESS
88c4a13c 189#define FILE_ANY_ACCESS 0x00000000
c7b36b95
FP		 190#endif
191#ifndef CTL_CODE
88c4a13c 192#define CTL_CODE(t,f,m,a) (((t)<<16)|((a)<<14)|((f)<<2)|(m))
c7b36b95 193#endif
c86f791f
EZ		 194/* MinGW64 defines FSCTL_GET_REPARSE_POINT on winioctl.h. */
195#ifndef FSCTL_GET_REPARSE_POINT
88c4a13c
EZ		 196#define FSCTL_GET_REPARSE_POINT \
197 CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 42, METHOD_BUFFERED, FILE_ANY_ACCESS)
6dad7178 198#endif
c86f791f 199#endif
6dad7178 200
7d701334 201/* TCP connection support. */
480b0c5b
GV		 202#include <sys/socket.h>
203#undef socket
204#undef bind
205#undef connect
206#undef htons
207#undef ntohs
208#undef inet_addr
209#undef gethostname
210#undef gethostbyname
211#undef getservbyname
ecd270eb 212#undef getpeername
380961a6 213#undef shutdown
962955c5
JR		 214#undef setsockopt
215#undef listen
216#undef getsockname
217#undef accept
218#undef recvfrom
219#undef sendto
00b3b7b3 220
3dffe395
EZ		 221#include <iphlpapi.h> /* should be after winsock2.h */
222
489f9371 223#include "w32.h"
95ef7787 224#include <dirent.h>
501199a3 225#include "w32common.h"
489f9371 226#include "w32heap.h"
a68089e4 227#include "w32select.h"
253574a6 228#include "systime.h"
f481eb31 229#include "dispextern.h" /* for xstrcasecmp */
7c80d5ec 230#include "coding.h" /* for Vlocale_coding_system */
253574a6 231
973f782d
EZ		 232#include "careadlinkat.h"
233#include "allocator.h"
234
1eb8fd91 235/* For serial_configure and serial_open. */
d888760c 236#include "process.h"
d888760c 237
2d5324c5
JR		 238typedef HRESULT (WINAPI * ShGetFolderPath_fn)
239 (IN HWND, IN int, IN HANDLE, IN DWORD, OUT char *);
240
0898ca10
JB		 241Lisp_Object QCloaded_from;
242
b56ceb92 243void globals_of_w32 (void);
8aaaec6b 244static DWORD get_rid (PSID);
6dad7178
EZ		 245static int is_symlink (const char *);
246static char * chase_symlinks (const char *);
247static int enable_privilege (LPCTSTR, BOOL, TOKEN_PRIVILEGES *);
248static int restore_privilege (TOKEN_PRIVILEGES *);
249static BOOL WINAPI revert_to_self (void);
9785d95b 250
b1846422 251static int sys_access (const char *, int);
a68089e4
EZ		 252extern void *e_malloc (size_t);
253extern int sys_select (int, SELECT_TYPE *, SELECT_TYPE *, SELECT_TYPE *,
43aac990 254 struct timespec *, void *);
1d442672
EZ		 255extern int sys_dup (int);
256
a68089e4
EZ		 257
258
18e070ac 259\f
9d95a291
EZ		 260/* Initialization states.
261
262 WARNING: If you add any more such variables for additional APIs,
263 you MUST add initialization for them to globals_of_w32
264 below. This is because these variables might get set
265 to non-NULL values during dumping, but the dumped Emacs
266 cannot reuse those values, because it could be run on a
267 different version of the OS, where API addresses are
268 different. */
9785d95b
BK		 269static BOOL g_b_init_is_windows_9x;
270static BOOL g_b_init_open_process_token;
271static BOOL g_b_init_get_token_information;
272static BOOL g_b_init_lookup_account_sid;
c617afce
EZ		 273static BOOL g_b_init_get_sid_sub_authority;
274static BOOL g_b_init_get_sid_sub_authority_count;
6dad7178 275static BOOL g_b_init_get_security_info;
8aaaec6b
EZ		 276static BOOL g_b_init_get_file_security;
277static BOOL g_b_init_get_security_descriptor_owner;
278static BOOL g_b_init_get_security_descriptor_group;
279static BOOL g_b_init_is_valid_sid;
7c80d5ec
EZ		 280static BOOL g_b_init_create_toolhelp32_snapshot;
281static BOOL g_b_init_process32_first;
282static BOOL g_b_init_process32_next;
283static BOOL g_b_init_open_thread_token;
284static BOOL g_b_init_impersonate_self;
285static BOOL g_b_init_revert_to_self;
286static BOOL g_b_init_get_process_memory_info;
287static BOOL g_b_init_get_process_working_set_size;
288static BOOL g_b_init_global_memory_status;
289static BOOL g_b_init_global_memory_status_ex;
f8b35b24
EZ		 290static BOOL g_b_init_get_length_sid;
291static BOOL g_b_init_equal_sid;
292static BOOL g_b_init_copy_sid;
ad9e2d54
EZ		 293static BOOL g_b_init_get_native_system_info;
294static BOOL g_b_init_get_system_times;
6dad7178 295static BOOL g_b_init_create_symbolic_link;
66447e07
EZ		 296static BOOL g_b_init_get_security_descriptor_dacl;
297static BOOL g_b_init_convert_sd_to_sddl;
298static BOOL g_b_init_convert_sddl_to_sd;
299static BOOL g_b_init_is_valid_security_descriptor;
300static BOOL g_b_init_set_file_security;
3dffe395 301static BOOL g_b_init_get_adapters_info;
9785d95b 302
f60ae425
BK		 303/*
304 BEGIN: Wrapper functions around OpenProcessToken
305 and other functions in advapi32.dll that are only
306 supported in Windows NT / 2k / XP
307*/
308 /* ** Function pointer typedefs ** */
309typedef BOOL (WINAPI * OpenProcessToken_Proc) (
310 HANDLE ProcessHandle,
311 DWORD DesiredAccess,
312 PHANDLE TokenHandle);
313typedef BOOL (WINAPI * GetTokenInformation_Proc) (
314 HANDLE TokenHandle,
315 TOKEN_INFORMATION_CLASS TokenInformationClass,
316 LPVOID TokenInformation,
317 DWORD TokenInformationLength,
318 PDWORD ReturnLength);
74258518
JR		 319typedef BOOL (WINAPI * GetProcessTimes_Proc) (
320 HANDLE process_handle,
321 LPFILETIME creation_time,
322 LPFILETIME exit_time,
323 LPFILETIME kernel_time,
324 LPFILETIME user_time);
325
326GetProcessTimes_Proc get_process_times_fn = NULL;
327
f60ae425
BK		 328#ifdef _UNICODE
329const char * const LookupAccountSid_Name = "LookupAccountSidW";
8aaaec6b 330const char * const GetFileSecurity_Name = "GetFileSecurityW";
66447e07 331const char * const SetFileSecurity_Name = "SetFileSecurityW";
f60ae425
BK		 332#else
333const char * const LookupAccountSid_Name = "LookupAccountSidA";
8aaaec6b 334const char * const GetFileSecurity_Name = "GetFileSecurityA";
66447e07 335const char * const SetFileSecurity_Name = "SetFileSecurityA";
f60ae425
BK		 336#endif
337typedef BOOL (WINAPI * LookupAccountSid_Proc) (
338 LPCTSTR lpSystemName,
339 PSID Sid,
340 LPTSTR Name,
341 LPDWORD cbName,
342 LPTSTR DomainName,
343 LPDWORD cbDomainName,
344 PSID_NAME_USE peUse);
c617afce
EZ		 345typedef PDWORD (WINAPI * GetSidSubAuthority_Proc) (
346 PSID pSid,
347 DWORD n);
348typedef PUCHAR (WINAPI * GetSidSubAuthorityCount_Proc) (
349 PSID pSid);
6dad7178
EZ		 350typedef DWORD (WINAPI * GetSecurityInfo_Proc) (
351 HANDLE handle,
352 SE_OBJECT_TYPE ObjectType,
353 SECURITY_INFORMATION SecurityInfo,
354 PSID *ppsidOwner,
355 PSID *ppsidGroup,
356 PACL *ppDacl,
357 PACL *ppSacl,
358 PSECURITY_DESCRIPTOR *ppSecurityDescriptor);
8aaaec6b
EZ		 359typedef BOOL (WINAPI * GetFileSecurity_Proc) (
360 LPCTSTR lpFileName,
361 SECURITY_INFORMATION RequestedInformation,
362 PSECURITY_DESCRIPTOR pSecurityDescriptor,
363 DWORD nLength,
364 LPDWORD lpnLengthNeeded);
66447e07
EZ		 365typedef BOOL (WINAPI *SetFileSecurity_Proc) (
366 LPCTSTR lpFileName,
367 SECURITY_INFORMATION SecurityInformation,
368 PSECURITY_DESCRIPTOR pSecurityDescriptor);
8aaaec6b
EZ		 369typedef BOOL (WINAPI * GetSecurityDescriptorOwner_Proc) (
370 PSECURITY_DESCRIPTOR pSecurityDescriptor,
371 PSID *pOwner,
372 LPBOOL lpbOwnerDefaulted);
373typedef BOOL (WINAPI * GetSecurityDescriptorGroup_Proc) (
374 PSECURITY_DESCRIPTOR pSecurityDescriptor,
375 PSID *pGroup,
376 LPBOOL lpbGroupDefaulted);
66447e07
EZ		 377typedef BOOL (WINAPI *GetSecurityDescriptorDacl_Proc) (
378 PSECURITY_DESCRIPTOR pSecurityDescriptor,
379 LPBOOL lpbDaclPresent,
380 PACL *pDacl,
381 LPBOOL lpbDaclDefaulted);
8aaaec6b
EZ		 382typedef BOOL (WINAPI * IsValidSid_Proc) (
383 PSID sid);
7c80d5ec
EZ		 384typedef HANDLE (WINAPI * CreateToolhelp32Snapshot_Proc) (
385 DWORD dwFlags,
386 DWORD th32ProcessID);
387typedef BOOL (WINAPI * Process32First_Proc) (
388 HANDLE hSnapshot,
389 LPPROCESSENTRY32 lppe);
390typedef BOOL (WINAPI * Process32Next_Proc) (
391 HANDLE hSnapshot,
392 LPPROCESSENTRY32 lppe);
393typedef BOOL (WINAPI * OpenThreadToken_Proc) (
394 HANDLE ThreadHandle,
395 DWORD DesiredAccess,
396 BOOL OpenAsSelf,
397 PHANDLE TokenHandle);
398typedef BOOL (WINAPI * ImpersonateSelf_Proc) (
399 SECURITY_IMPERSONATION_LEVEL ImpersonationLevel);
400typedef BOOL (WINAPI * RevertToSelf_Proc) (void);
401typedef BOOL (WINAPI * GetProcessMemoryInfo_Proc) (
402 HANDLE Process,
403 PPROCESS_MEMORY_COUNTERS ppsmemCounters,
404 DWORD cb);
405typedef BOOL (WINAPI * GetProcessWorkingSetSize_Proc) (
406 HANDLE hProcess,
cb576b5c
FP		 407 PSIZE_T lpMinimumWorkingSetSize,
408 PSIZE_T lpMaximumWorkingSetSize);
7c80d5ec
EZ		 409typedef BOOL (WINAPI * GlobalMemoryStatus_Proc) (
410 LPMEMORYSTATUS lpBuffer);
411typedef BOOL (WINAPI * GlobalMemoryStatusEx_Proc) (
b8526f6e 412 LPMEMORY_STATUS_EX lpBuffer);
f8b35b24
EZ		 413typedef BOOL (WINAPI * CopySid_Proc) (
414 DWORD nDestinationSidLength,
415 PSID pDestinationSid,
416 PSID pSourceSid);
417typedef BOOL (WINAPI * EqualSid_Proc) (
418 PSID pSid1,
419 PSID pSid2);
420typedef DWORD (WINAPI * GetLengthSid_Proc) (
421 PSID pSid);
ad9e2d54
EZ		 422typedef void (WINAPI * GetNativeSystemInfo_Proc) (
423 LPSYSTEM_INFO lpSystemInfo);
424typedef BOOL (WINAPI * GetSystemTimes_Proc) (
425 LPFILETIME lpIdleTime,
426 LPFILETIME lpKernelTime,
427 LPFILETIME lpUserTime);
6dad7178
EZ		 428typedef BOOLEAN (WINAPI *CreateSymbolicLink_Proc) (
429 LPTSTR lpSymlinkFileName,
430 LPTSTR lpTargetFileName,
431 DWORD dwFlags);
66447e07
EZ		 432typedef BOOL (WINAPI *ConvertStringSecurityDescriptorToSecurityDescriptor_Proc) (
433 LPCTSTR StringSecurityDescriptor,
434 DWORD StringSDRevision,
435 PSECURITY_DESCRIPTOR *SecurityDescriptor,
436 PULONG SecurityDescriptorSize);
437typedef BOOL (WINAPI *ConvertSecurityDescriptorToStringSecurityDescriptor_Proc) (
438 PSECURITY_DESCRIPTOR SecurityDescriptor,
439 DWORD RequestedStringSDRevision,
440 SECURITY_INFORMATION SecurityInformation,
441 LPTSTR *StringSecurityDescriptor,
442 PULONG StringSecurityDescriptorLen);
443typedef BOOL (WINAPI *IsValidSecurityDescriptor_Proc) (PSECURITY_DESCRIPTOR);
3dffe395
EZ		 444typedef DWORD (WINAPI *GetAdaptersInfo_Proc) (
445 PIP_ADAPTER_INFO pAdapterInfo,
446 PULONG pOutBufLen);
f8b35b24 447
f60ae425 448 /* ** A utility function ** */
9bfb11f9 449static BOOL
b56ceb92 450is_windows_9x (void)
f60ae425 451{
bedf4aab 452 static BOOL s_b_ret = 0;
f60ae425 453 OSVERSIONINFO os_ver;
9785d95b 454 if (g_b_init_is_windows_9x == 0)
f60ae425 455 {
9785d95b 456 g_b_init_is_windows_9x = 1;
ed3751c8
JB		 457 ZeroMemory (&os_ver, sizeof (OSVERSIONINFO));
458 os_ver.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
9785d95b
BK		 459 if (GetVersionEx (&os_ver))
460 {
461 s_b_ret = (os_ver.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS);
462 }
f60ae425 463 }
9785d95b 464 return s_b_ret;
f60ae425
BK		 465}
466
d35af63c
PE		 467static Lisp_Object ltime (ULONGLONG);
468
74258518 469/* Get total user and system times for get-internal-run-time.
d35af63c 470 Returns a list of integers if the times are provided by the OS
74258518
JR		 471 (NT derivatives), otherwise it returns the result of current-time. */
472Lisp_Object
b56ceb92 473w32_get_internal_run_time (void)
74258518
JR		 474{
475 if (get_process_times_fn)
476 {
477 FILETIME create, exit, kernel, user;
ed3751c8 478 HANDLE proc = GetCurrentProcess ();
74258518
JR		 479 if ((*get_process_times_fn) (proc, &create, &exit, &kernel, &user))
480 {
481 LARGE_INTEGER user_int, kernel_int, total;
74258518
JR		 482 user_int.LowPart = user.dwLowDateTime;
483 user_int.HighPart = user.dwHighDateTime;
484 kernel_int.LowPart = kernel.dwLowDateTime;
485 kernel_int.HighPart = kernel.dwHighDateTime;
486 total.QuadPart = user_int.QuadPart + kernel_int.QuadPart;
d35af63c 487 return ltime (total.QuadPart);
74258518
JR		 488 }
489 }
490
491 return Fcurrent_time ();
492}
493
f60ae425
BK		 494 /* ** The wrapper functions ** */
495
bedf4aab
JB		 496static BOOL WINAPI
497open_process_token (HANDLE ProcessHandle,
498 DWORD DesiredAccess,
499 PHANDLE TokenHandle)
f60ae425 500{
9785d95b 501 static OpenProcessToken_Proc s_pfn_Open_Process_Token = NULL;
f60ae425
BK		 502 HMODULE hm_advapi32 = NULL;
503 if (is_windows_9x () == TRUE)
504 {
505 return FALSE;
506 }
9785d95b
BK		 507 if (g_b_init_open_process_token == 0)
508 {
509 g_b_init_open_process_token = 1;
510 hm_advapi32 = LoadLibrary ("Advapi32.dll");
511 s_pfn_Open_Process_Token =
512 (OpenProcessToken_Proc) GetProcAddress (hm_advapi32, "OpenProcessToken");
513 }
514 if (s_pfn_Open_Process_Token == NULL)
f60ae425
BK		 515 {
516 return FALSE;
517 }
518 return (
9785d95b 519 s_pfn_Open_Process_Token (
f60ae425
BK		 520 ProcessHandle,
521 DesiredAccess,
522 TokenHandle)
523 );
524}
525
bedf4aab
JB		 526static BOOL WINAPI
527get_token_information (HANDLE TokenHandle,
528 TOKEN_INFORMATION_CLASS TokenInformationClass,
529 LPVOID TokenInformation,
530 DWORD TokenInformationLength,
531 PDWORD ReturnLength)
f60ae425 532{
9785d95b 533 static GetTokenInformation_Proc s_pfn_Get_Token_Information = NULL;
f60ae425
BK		 534 HMODULE hm_advapi32 = NULL;
535 if (is_windows_9x () == TRUE)
536 {
537 return FALSE;
538 }
9785d95b
BK		 539 if (g_b_init_get_token_information == 0)
540 {
541 g_b_init_get_token_information = 1;
542 hm_advapi32 = LoadLibrary ("Advapi32.dll");
543 s_pfn_Get_Token_Information =
544 (GetTokenInformation_Proc) GetProcAddress (hm_advapi32, "GetTokenInformation");
545 }
546 if (s_pfn_Get_Token_Information == NULL)
f60ae425
BK		 547 {
548 return FALSE;
549 }
550 return (
9785d95b 551 s_pfn_Get_Token_Information (
f60ae425
BK		 552 TokenHandle,
553 TokenInformationClass,
554 TokenInformation,
555 TokenInformationLength,
556 ReturnLength)
557 );
558}
559
bedf4aab
JB		 560static BOOL WINAPI
561lookup_account_sid (LPCTSTR lpSystemName,
562 PSID Sid,
563 LPTSTR Name,
564 LPDWORD cbName,
565 LPTSTR DomainName,
566 LPDWORD cbDomainName,
567 PSID_NAME_USE peUse)
f60ae425 568{
9785d95b 569 static LookupAccountSid_Proc s_pfn_Lookup_Account_Sid = 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_lookup_account_sid == 0)
576 {
577 g_b_init_lookup_account_sid = 1;
578 hm_advapi32 = LoadLibrary ("Advapi32.dll");
579 s_pfn_Lookup_Account_Sid =
580 (LookupAccountSid_Proc) GetProcAddress (hm_advapi32, LookupAccountSid_Name);
581 }
582 if (s_pfn_Lookup_Account_Sid == NULL)
f60ae425
BK		 583 {
584 return FALSE;
585 }
586 return (
9785d95b 587 s_pfn_Lookup_Account_Sid (
f60ae425
BK		 588 lpSystemName,
589 Sid,
590 Name,
591 cbName,
592 DomainName,
593 cbDomainName,
594 peUse)
595 );
596}
597
bedf4aab
JB		 598static PDWORD WINAPI
599get_sid_sub_authority (PSID pSid, DWORD n)
c617afce
EZ		 600{
601 static GetSidSubAuthority_Proc s_pfn_Get_Sid_Sub_Authority = NULL;
6811b9f4 602 static DWORD zero = 0U;
c617afce
EZ		 603 HMODULE hm_advapi32 = NULL;
604 if (is_windows_9x () == TRUE)
605 {
6811b9f4 606 return &zero;
c617afce
EZ		 607 }
608 if (g_b_init_get_sid_sub_authority == 0)
609 {
610 g_b_init_get_sid_sub_authority = 1;
611 hm_advapi32 = LoadLibrary ("Advapi32.dll");
612 s_pfn_Get_Sid_Sub_Authority =
613 (GetSidSubAuthority_Proc) GetProcAddress (
614 hm_advapi32, "GetSidSubAuthority");
615 }
616 if (s_pfn_Get_Sid_Sub_Authority == NULL)
617 {
6811b9f4 618 return &zero;
c617afce
EZ		 619 }
620 return (s_pfn_Get_Sid_Sub_Authority (pSid, n));
621}
622
bedf4aab
JB		 623static PUCHAR WINAPI
624get_sid_sub_authority_count (PSID pSid)
c617afce
EZ		 625{
626 static GetSidSubAuthorityCount_Proc s_pfn_Get_Sid_Sub_Authority_Count = NULL;
6811b9f4 627 static UCHAR zero = 0U;
c617afce
EZ		 628 HMODULE hm_advapi32 = NULL;
629 if (is_windows_9x () == TRUE)
630 {
6811b9f4 631 return &zero;
c617afce
EZ		 632 }
633 if (g_b_init_get_sid_sub_authority_count == 0)
634 {
635 g_b_init_get_sid_sub_authority_count = 1;
636 hm_advapi32 = LoadLibrary ("Advapi32.dll");
637 s_pfn_Get_Sid_Sub_Authority_Count =
638 (GetSidSubAuthorityCount_Proc) GetProcAddress (
639 hm_advapi32, "GetSidSubAuthorityCount");
640 }
641 if (s_pfn_Get_Sid_Sub_Authority_Count == NULL)
642 {
6811b9f4 643 return &zero;
c617afce
EZ		 644 }
645 return (s_pfn_Get_Sid_Sub_Authority_Count (pSid));
646}
647
6dad7178
EZ		 648static DWORD WINAPI
649get_security_info (HANDLE handle,
650 SE_OBJECT_TYPE ObjectType,
651 SECURITY_INFORMATION SecurityInfo,
652 PSID *ppsidOwner,
653 PSID *ppsidGroup,
654 PACL *ppDacl,
655 PACL *ppSacl,
656 PSECURITY_DESCRIPTOR *ppSecurityDescriptor)
657{
658 static GetSecurityInfo_Proc s_pfn_Get_Security_Info = NULL;
659 HMODULE hm_advapi32 = NULL;
660 if (is_windows_9x () == TRUE)
661 {
662 return FALSE;
663 }
664 if (g_b_init_get_security_info == 0)
665 {
666 g_b_init_get_security_info = 1;
667 hm_advapi32 = LoadLibrary ("Advapi32.dll");
668 s_pfn_Get_Security_Info =
669 (GetSecurityInfo_Proc) GetProcAddress (
670 hm_advapi32, "GetSecurityInfo");
671 }
672 if (s_pfn_Get_Security_Info == NULL)
673 {
674 return FALSE;
675 }
676 return (s_pfn_Get_Security_Info (handle, ObjectType, SecurityInfo,
677 ppsidOwner, ppsidGroup, ppDacl, ppSacl,
678 ppSecurityDescriptor));
679}
680
bedf4aab
JB		 681static BOOL WINAPI
682get_file_security (LPCTSTR lpFileName,
683 SECURITY_INFORMATION RequestedInformation,
684 PSECURITY_DESCRIPTOR pSecurityDescriptor,
685 DWORD nLength,
686 LPDWORD lpnLengthNeeded)
8aaaec6b
EZ		 687{
688 static GetFileSecurity_Proc s_pfn_Get_File_Security = NULL;
689 HMODULE hm_advapi32 = NULL;
690 if (is_windows_9x () == TRUE)
691 {
66447e07 692 errno = ENOTSUP;
8aaaec6b
EZ		 693 return FALSE;
694 }
695 if (g_b_init_get_file_security == 0)
696 {
697 g_b_init_get_file_security = 1;
698 hm_advapi32 = LoadLibrary ("Advapi32.dll");
699 s_pfn_Get_File_Security =
700 (GetFileSecurity_Proc) GetProcAddress (
701 hm_advapi32, GetFileSecurity_Name);
702 }
703 if (s_pfn_Get_File_Security == NULL)
704 {
66447e07 705 errno = ENOTSUP;
8aaaec6b
EZ		 706 return FALSE;
707 }
708 return (s_pfn_Get_File_Security (lpFileName, RequestedInformation,
709 pSecurityDescriptor, nLength,
710 lpnLengthNeeded));
711}
712
66447e07
EZ		 713static BOOL WINAPI
714set_file_security (LPCTSTR lpFileName,
715 SECURITY_INFORMATION SecurityInformation,
716 PSECURITY_DESCRIPTOR pSecurityDescriptor)
717{
718 static SetFileSecurity_Proc s_pfn_Set_File_Security = NULL;
719 HMODULE hm_advapi32 = NULL;
720 if (is_windows_9x () == TRUE)
721 {
722 errno = ENOTSUP;
723 return FALSE;
724 }
725 if (g_b_init_set_file_security == 0)
726 {
727 g_b_init_set_file_security = 1;
728 hm_advapi32 = LoadLibrary ("Advapi32.dll");
729 s_pfn_Set_File_Security =
730 (SetFileSecurity_Proc) GetProcAddress (
731 hm_advapi32, SetFileSecurity_Name);
732 }
733 if (s_pfn_Set_File_Security == NULL)
734 {
735 errno = ENOTSUP;
736 return FALSE;
737 }
738 return (s_pfn_Set_File_Security (lpFileName, SecurityInformation,
739 pSecurityDescriptor));
740}
741
bedf4aab
JB		 742static BOOL WINAPI
743get_security_descriptor_owner (PSECURITY_DESCRIPTOR pSecurityDescriptor,
744 PSID *pOwner,
745 LPBOOL lpbOwnerDefaulted)
8aaaec6b
EZ		 746{
747 static GetSecurityDescriptorOwner_Proc s_pfn_Get_Security_Descriptor_Owner = NULL;
748 HMODULE hm_advapi32 = NULL;
749 if (is_windows_9x () == TRUE)
750 {
66447e07 751 errno = ENOTSUP;
8aaaec6b
EZ		 752 return FALSE;
753 }
754 if (g_b_init_get_security_descriptor_owner == 0)
755 {
756 g_b_init_get_security_descriptor_owner = 1;
757 hm_advapi32 = LoadLibrary ("Advapi32.dll");
758 s_pfn_Get_Security_Descriptor_Owner =
759 (GetSecurityDescriptorOwner_Proc) GetProcAddress (
760 hm_advapi32, "GetSecurityDescriptorOwner");
761 }
762 if (s_pfn_Get_Security_Descriptor_Owner == NULL)
763 {
66447e07 764 errno = ENOTSUP;
8aaaec6b
EZ		 765 return FALSE;
766 }
767 return (s_pfn_Get_Security_Descriptor_Owner (pSecurityDescriptor, pOwner,
768 lpbOwnerDefaulted));
769}
770
bedf4aab
JB		 771static BOOL WINAPI
772get_security_descriptor_group (PSECURITY_DESCRIPTOR pSecurityDescriptor,
773 PSID *pGroup,
774 LPBOOL lpbGroupDefaulted)
8aaaec6b
EZ		 775{
776 static GetSecurityDescriptorGroup_Proc s_pfn_Get_Security_Descriptor_Group = NULL;
777 HMODULE hm_advapi32 = NULL;
778 if (is_windows_9x () == TRUE)
779 {
66447e07 780 errno = ENOTSUP;
8aaaec6b
EZ		 781 return FALSE;
782 }
783 if (g_b_init_get_security_descriptor_group == 0)
784 {
785 g_b_init_get_security_descriptor_group = 1;
786 hm_advapi32 = LoadLibrary ("Advapi32.dll");
787 s_pfn_Get_Security_Descriptor_Group =
788 (GetSecurityDescriptorGroup_Proc) GetProcAddress (
789 hm_advapi32, "GetSecurityDescriptorGroup");
790 }
791 if (s_pfn_Get_Security_Descriptor_Group == NULL)
792 {
66447e07 793 errno = ENOTSUP;
8aaaec6b
EZ		 794 return FALSE;
795 }
796 return (s_pfn_Get_Security_Descriptor_Group (pSecurityDescriptor, pGroup,
797 lpbGroupDefaulted));
798}
799
66447e07
EZ		 800static BOOL WINAPI
801get_security_descriptor_dacl (PSECURITY_DESCRIPTOR pSecurityDescriptor,
802 LPBOOL lpbDaclPresent,
803 PACL *pDacl,
804 LPBOOL lpbDaclDefaulted)
805{
806 static GetSecurityDescriptorDacl_Proc s_pfn_Get_Security_Descriptor_Dacl = NULL;
807 HMODULE hm_advapi32 = NULL;
808 if (is_windows_9x () == TRUE)
809 {
810 errno = ENOTSUP;
811 return FALSE;
812 }
813 if (g_b_init_get_security_descriptor_dacl == 0)
814 {
815 g_b_init_get_security_descriptor_dacl = 1;
816 hm_advapi32 = LoadLibrary ("Advapi32.dll");
817 s_pfn_Get_Security_Descriptor_Dacl =
818 (GetSecurityDescriptorDacl_Proc) GetProcAddress (
819 hm_advapi32, "GetSecurityDescriptorDacl");
820 }
821 if (s_pfn_Get_Security_Descriptor_Dacl == NULL)
822 {
823 errno = ENOTSUP;
824 return FALSE;
825 }
826 return (s_pfn_Get_Security_Descriptor_Dacl (pSecurityDescriptor,
827 lpbDaclPresent, pDacl,
828 lpbDaclDefaulted));
829}
830
bedf4aab
JB		 831static BOOL WINAPI
832is_valid_sid (PSID sid)
8aaaec6b
EZ		 833{
834 static IsValidSid_Proc s_pfn_Is_Valid_Sid = NULL;
835 HMODULE hm_advapi32 = NULL;
836 if (is_windows_9x () == TRUE)
837 {
838 return FALSE;
839 }
840 if (g_b_init_is_valid_sid == 0)
841 {
842 g_b_init_is_valid_sid = 1;
843 hm_advapi32 = LoadLibrary ("Advapi32.dll");
844 s_pfn_Is_Valid_Sid =
845 (IsValidSid_Proc) GetProcAddress (
846 hm_advapi32, "IsValidSid");
847 }
848 if (s_pfn_Is_Valid_Sid == NULL)
849 {
850 return FALSE;
851 }
852 return (s_pfn_Is_Valid_Sid (sid));
853}
854
bedf4aab
JB		 855static BOOL WINAPI
856equal_sid (PSID sid1, PSID sid2)
f8b35b24
EZ		 857{
858 static EqualSid_Proc s_pfn_Equal_Sid = NULL;
859 HMODULE hm_advapi32 = NULL;
860 if (is_windows_9x () == TRUE)
861 {
862 return FALSE;
863 }
864 if (g_b_init_equal_sid == 0)
865 {
866 g_b_init_equal_sid = 1;
867 hm_advapi32 = LoadLibrary ("Advapi32.dll");
868 s_pfn_Equal_Sid =
869 (EqualSid_Proc) GetProcAddress (
870 hm_advapi32, "EqualSid");
871 }
872 if (s_pfn_Equal_Sid == NULL)
873 {
874 return FALSE;
875 }
876 return (s_pfn_Equal_Sid (sid1, sid2));
877}
878
bedf4aab
JB		 879static DWORD WINAPI
880get_length_sid (PSID sid)
f8b35b24
EZ		 881{
882 static GetLengthSid_Proc s_pfn_Get_Length_Sid = NULL;
883 HMODULE hm_advapi32 = NULL;
884 if (is_windows_9x () == TRUE)
885 {
886 return 0;
887 }
888 if (g_b_init_get_length_sid == 0)
889 {
890 g_b_init_get_length_sid = 1;
891 hm_advapi32 = LoadLibrary ("Advapi32.dll");
892 s_pfn_Get_Length_Sid =
893 (GetLengthSid_Proc) GetProcAddress (
894 hm_advapi32, "GetLengthSid");
895 }
896 if (s_pfn_Get_Length_Sid == NULL)
897 {
898 return 0;
899 }
900 return (s_pfn_Get_Length_Sid (sid));
901}
902
bedf4aab
JB		 903static BOOL WINAPI
904copy_sid (DWORD destlen, PSID dest, PSID src)
f8b35b24
EZ		 905{
906 static CopySid_Proc s_pfn_Copy_Sid = NULL;
907 HMODULE hm_advapi32 = NULL;
908 if (is_windows_9x () == TRUE)
909 {
910 return FALSE;
911 }
912 if (g_b_init_copy_sid == 0)
913 {
914 g_b_init_copy_sid = 1;
915 hm_advapi32 = LoadLibrary ("Advapi32.dll");
916 s_pfn_Copy_Sid =
917 (CopySid_Proc) GetProcAddress (
918 hm_advapi32, "CopySid");
919 }
920 if (s_pfn_Copy_Sid == NULL)
921 {
922 return FALSE;
923 }
924 return (s_pfn_Copy_Sid (destlen, dest, src));
925}
926
f60ae425
BK		 927/*
928 END: Wrapper functions around OpenProcessToken
929 and other functions in advapi32.dll that are only
930 supported in Windows NT / 2k / XP
931*/
932
bedf4aab
JB		 933static void WINAPI
934get_native_system_info (LPSYSTEM_INFO lpSystemInfo)
ad9e2d54
EZ		 935{
936 static GetNativeSystemInfo_Proc s_pfn_Get_Native_System_Info = NULL;
937 if (is_windows_9x () != TRUE)
938 {
939 if (g_b_init_get_native_system_info == 0)
940 {
941 g_b_init_get_native_system_info = 1;
942 s_pfn_Get_Native_System_Info =
943 (GetNativeSystemInfo_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
944 "GetNativeSystemInfo");
945 }
946 if (s_pfn_Get_Native_System_Info != NULL)
947 s_pfn_Get_Native_System_Info (lpSystemInfo);
948 }
949 else
950 lpSystemInfo->dwNumberOfProcessors = -1;
951}
952
bedf4aab
JB		 953static BOOL WINAPI
954get_system_times (LPFILETIME lpIdleTime,
955 LPFILETIME lpKernelTime,
956 LPFILETIME lpUserTime)
ad9e2d54
EZ		 957{
958 static GetSystemTimes_Proc s_pfn_Get_System_times = NULL;
959 if (is_windows_9x () == TRUE)
960 {
961 return FALSE;
962 }
963 if (g_b_init_get_system_times == 0)
964 {
965 g_b_init_get_system_times = 1;
966 s_pfn_Get_System_times =
967 (GetSystemTimes_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
968 "GetSystemTimes");
969 }
970 if (s_pfn_Get_System_times == NULL)
971 return FALSE;
972 return (s_pfn_Get_System_times (lpIdleTime, lpKernelTime, lpUserTime));
973}
6dad7178
EZ		 974
975static BOOLEAN WINAPI
976create_symbolic_link (LPTSTR lpSymlinkFilename,
977 LPTSTR lpTargetFileName,
978 DWORD dwFlags)
979{
980 static CreateSymbolicLink_Proc s_pfn_Create_Symbolic_Link = NULL;
981 BOOLEAN retval;
982
983 if (is_windows_9x () == TRUE)
984 {
985 errno = ENOSYS;
986 return 0;
987 }
988 if (g_b_init_create_symbolic_link == 0)
989 {
990 g_b_init_create_symbolic_link = 1;
991#ifdef _UNICODE
992 s_pfn_Create_Symbolic_Link =
993 (CreateSymbolicLink_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
994 "CreateSymbolicLinkW");
995#else
996 s_pfn_Create_Symbolic_Link =
997 (CreateSymbolicLink_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
998 "CreateSymbolicLinkA");
999#endif
1000 }
1001 if (s_pfn_Create_Symbolic_Link == NULL)
1002 {
1003 errno = ENOSYS;
1004 return 0;
1005 }
1006
1007 retval = s_pfn_Create_Symbolic_Link (lpSymlinkFilename, lpTargetFileName,
1008 dwFlags);
1009 /* If we were denied creation of the symlink, try again after
1010 enabling the SeCreateSymbolicLinkPrivilege for our process. */
1011 if (!retval)
1012 {
1013 TOKEN_PRIVILEGES priv_current;
1014
1015 if (enable_privilege (SE_CREATE_SYMBOLIC_LINK_NAME, TRUE, &priv_current))
1016 {
1017 retval = s_pfn_Create_Symbolic_Link (lpSymlinkFilename, lpTargetFileName,
1018 dwFlags);
1019 restore_privilege (&priv_current);
1020 revert_to_self ();
1021 }
1022 }
1023 return retval;
1024}
66447e07
EZ		 1025
1026static BOOL WINAPI
1027is_valid_security_descriptor (PSECURITY_DESCRIPTOR pSecurityDescriptor)
1028{
1029 static IsValidSecurityDescriptor_Proc s_pfn_Is_Valid_Security_Descriptor_Proc = NULL;
1030
1031 if (is_windows_9x () == TRUE)
1032 {
1033 errno = ENOTSUP;
1034 return FALSE;
1035 }
1036
1037 if (g_b_init_is_valid_security_descriptor == 0)
1038 {
1039 g_b_init_is_valid_security_descriptor = 1;
1040 s_pfn_Is_Valid_Security_Descriptor_Proc =
1041 (IsValidSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1042 "IsValidSecurityDescriptor");
1043 }
1044 if (s_pfn_Is_Valid_Security_Descriptor_Proc == NULL)
1045 {
1046 errno = ENOTSUP;
1047 return FALSE;
1048 }
1049
1050 return s_pfn_Is_Valid_Security_Descriptor_Proc (pSecurityDescriptor);
1051}
1052
1053static BOOL WINAPI
1054convert_sd_to_sddl (PSECURITY_DESCRIPTOR SecurityDescriptor,
1055 DWORD RequestedStringSDRevision,
1056 SECURITY_INFORMATION SecurityInformation,
1057 LPTSTR *StringSecurityDescriptor,
1058 PULONG StringSecurityDescriptorLen)
1059{
1060 static ConvertSecurityDescriptorToStringSecurityDescriptor_Proc s_pfn_Convert_SD_To_SDDL = NULL;
1061 BOOL retval;
1062
1063 if (is_windows_9x () == TRUE)
1064 {
1065 errno = ENOTSUP;
1066 return FALSE;
1067 }
1068
1069 if (g_b_init_convert_sd_to_sddl == 0)
1070 {
1071 g_b_init_convert_sd_to_sddl = 1;
1072#ifdef _UNICODE
1073 s_pfn_Convert_SD_To_SDDL =
1074 (ConvertSecurityDescriptorToStringSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1075 "ConvertSecurityDescriptorToStringSecurityDescriptorW");
1076#else
1077 s_pfn_Convert_SD_To_SDDL =
1078 (ConvertSecurityDescriptorToStringSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1079 "ConvertSecurityDescriptorToStringSecurityDescriptorA");
1080#endif
1081 }
1082 if (s_pfn_Convert_SD_To_SDDL == NULL)
1083 {
1084 errno = ENOTSUP;
1085 return FALSE;
1086 }
1087
1088 retval = s_pfn_Convert_SD_To_SDDL (SecurityDescriptor,
1089 RequestedStringSDRevision,
1090 SecurityInformation,
1091 StringSecurityDescriptor,
1092 StringSecurityDescriptorLen);
1093
1094 return retval;
1095}
1096
1097static BOOL WINAPI
1098convert_sddl_to_sd (LPCTSTR StringSecurityDescriptor,
1099 DWORD StringSDRevision,
1100 PSECURITY_DESCRIPTOR *SecurityDescriptor,
1101 PULONG SecurityDescriptorSize)
1102{
1103 static ConvertStringSecurityDescriptorToSecurityDescriptor_Proc s_pfn_Convert_SDDL_To_SD = NULL;
1104 BOOL retval;
1105
1106 if (is_windows_9x () == TRUE)
1107 {
1108 errno = ENOTSUP;
1109 return FALSE;
1110 }
1111
1112 if (g_b_init_convert_sddl_to_sd == 0)
1113 {
1114 g_b_init_convert_sddl_to_sd = 1;
1115#ifdef _UNICODE
1116 s_pfn_Convert_SDDL_To_SD =
1117 (ConvertStringSecurityDescriptorToSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1118 "ConvertStringSecurityDescriptorToSecurityDescriptorW");
1119#else
1120 s_pfn_Convert_SDDL_To_SD =
1121 (ConvertStringSecurityDescriptorToSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1122 "ConvertStringSecurityDescriptorToSecurityDescriptorA");
1123#endif
1124 }
1125 if (s_pfn_Convert_SDDL_To_SD == NULL)
1126 {
1127 errno = ENOTSUP;
1128 return FALSE;
1129 }
1130
1131 retval = s_pfn_Convert_SDDL_To_SD (StringSecurityDescriptor,
1132 StringSDRevision,
1133 SecurityDescriptor,
1134 SecurityDescriptorSize);
1135
1136 return retval;
1137}
1138
3dffe395
EZ		 1139static DWORD WINAPI
1140get_adapters_info (PIP_ADAPTER_INFO pAdapterInfo, PULONG pOutBufLen)
1141{
1142 static GetAdaptersInfo_Proc s_pfn_Get_Adapters_Info = NULL;
1143 HMODULE hm_iphlpapi = NULL;
1144
1145 if (is_windows_9x () == TRUE)
1146 return ERROR_NOT_SUPPORTED;
1147
1148 if (g_b_init_get_adapters_info == 0)
1149 {
1150 g_b_init_get_adapters_info = 1;
1151 hm_iphlpapi = LoadLibrary ("Iphlpapi.dll");
1152 if (hm_iphlpapi)
1153 s_pfn_Get_Adapters_Info = (GetAdaptersInfo_Proc)
1154 GetProcAddress (hm_iphlpapi, "GetAdaptersInfo");
1155 }
1156 if (s_pfn_Get_Adapters_Info == NULL)
1157 return ERROR_NOT_SUPPORTED;
1158 return s_pfn_Get_Adapters_Info (pAdapterInfo, pOutBufLen);
1159}
1160
f60ae425 1161\f
18e070ac 1162
ed91b2ad
EZ		 1163/* Return 1 if P is a valid pointer to an object of size SIZE. Return
1164 0 if P is NOT a valid pointer. Return -1 if we cannot validate P.
1165
1166 This is called from alloc.c:valid_pointer_p. */
1167int
1168w32_valid_pointer_p (void *p, int size)
1169{
1170 SIZE_T done;
1171 HANDLE h = OpenProcess (PROCESS_VM_READ, FALSE, GetCurrentProcessId ());
1172
1173 if (h)
1174 {
1175 unsigned char *buf = alloca (size);
1176 int retval = ReadProcessMemory (h, p, buf, size, &done);
1177
1178 CloseHandle (h);
1179 return retval;
1180 }
1181 else
1182 return -1;
1183}
1184
03d58cca
EZ		 1185\f
1186
c3e9160b
EZ		 1187/* Converting file names from UTF-8 to either UTF-16 or the ANSI
1188 codepage defined by file-name-coding-system. */
1189
1190/* Current codepage for encoding file names. */
1191static int file_name_codepage;
1192
1193/* Produce a Windows ANSI codepage suitable for encoding file names.
1194 Return the information about that codepage in CP_INFO. */
1195static int
1196codepage_for_filenames (CPINFO *cp_info)
1197{
1198 /* A simple cache to avoid calling GetCPInfo every time we need to
1199 encode/decode a file name. The file-name encoding is not
1200 supposed to be changed too frequently, if ever. */
1201 static Lisp_Object last_file_name_encoding;
1202 static CPINFO cp;
1203 Lisp_Object current_encoding;
1204
1205 current_encoding = Vfile_name_coding_system;
1206 if (NILP (current_encoding))
1207 current_encoding = Vdefault_file_name_coding_system;
1208
1209 if (!EQ (last_file_name_encoding, current_encoding))
1210 {
1211 /* Default to the current ANSI codepage. */
1212 file_name_codepage = w32_ansi_code_page;
1213
1214 if (NILP (current_encoding))
1215 {
1216 char *cpname = SDATA (SYMBOL_NAME (current_encoding));
1217 char *cp = NULL, *end;
1218 int cpnum;
1219
1220 if (strncmp (cpname, "cp", 2) == 0)
1221 cp = cpname + 2;
1222 else if (strncmp (cpname, "windows-", 8) == 0)
1223 cp = cpname + 8;
1224
1225 if (cp)
1226 {
1227 end = cp;
1228 cpnum = strtol (cp, &end, 10);
1229 if (cpnum && *end == '\0' && end - cp >= 2)
1230 file_name_codepage = cpnum;
1231 }
1232 }
1233
1234 if (!file_name_codepage)
1235 file_name_codepage = CP_ACP; /* CP_ACP = 0, but let's not assume that */
1236
1237 if (!GetCPInfo (file_name_codepage, &cp))
1238 {
1239 file_name_codepage = CP_ACP;
1240 if (!GetCPInfo (file_name_codepage, &cp))
1241 emacs_abort ();
1242 }
1243 }
1244 if (cp_info)
1245 *cp_info = cp;
1246
1247 return file_name_codepage;
1248}
1249
03d58cca
EZ		 1250static int
1251filename_to_utf16 (const char *fn_in, wchar_t *fn_out)
1252{
c3e9160b
EZ		 1253 int result = MultiByteToWideChar (CP_UTF8, MB_ERR_INVALID_CHARS, fn_in, -1,
1254 fn_out, MAX_PATH);
03d58cca
EZ		 1255
1256 if (!result)
1257 {
1258 DWORD err = GetLastError ();
1259
1260 switch (err)
1261 {
1262 case ERROR_INVALID_FLAGS:
1263 case ERROR_INVALID_PARAMETER:
1264 errno = EINVAL;
1265 break;
1266 case ERROR_INSUFFICIENT_BUFFER:
1267 case ERROR_NO_UNICODE_TRANSLATION:
1268 default:
1269 errno = ENOENT;
1270 break;
1271 }
1272 return -1;
1273 }
1274 return 0;
1275}
1276
1277static int
1278filename_from_utf16 (const wchar_t *fn_in, char *fn_out)
1279{
c3e9160b
EZ		 1280 int result = WideCharToMultiByte (CP_UTF8, 0, fn_in, -1,
1281 fn_out, MAX_UTF8_PATH, NULL, NULL);
1282
1283 if (!result)
1284 {
1285 DWORD err = GetLastError ();
1286
1287 switch (err)
1288 {
1289 case ERROR_INVALID_FLAGS:
1290 case ERROR_INVALID_PARAMETER:
1291 errno = EINVAL;
1292 break;
1293 case ERROR_INSUFFICIENT_BUFFER:
1294 case ERROR_NO_UNICODE_TRANSLATION:
1295 default:
1296 errno = ENOENT;
1297 break;
1298 }
1299 return -1;
1300 }
1301 return 0;
03d58cca
EZ		 1302}
1303
1304static int
1305filename_to_ansi (const char *fn_in, char *fn_out)
1306{
80fcb9d2 1307 wchar_t fn_utf16[MAX_PATH];
03d58cca
EZ		 1308
1309 if (filename_to_utf16 (fn_in, fn_utf16) == 0)
1310 {
c3e9160b
EZ		 1311 int result;
1312 int codepage = codepage_for_filenames (NULL);
03d58cca 1313
c3e9160b 1314 result = WideCharToMultiByte (codepage, 0, fn_utf16, -1,
80fcb9d2 1315 fn_out, MAX_PATH, NULL, NULL);
03d58cca
EZ		 1316 if (!result)
1317 {
1318 DWORD err = GetLastError ();
1319
1320 switch (err)
1321 {
1322 case ERROR_INVALID_FLAGS:
1323 case ERROR_INVALID_PARAMETER:
1324 errno = EINVAL;
1325 break;
1326 case ERROR_INSUFFICIENT_BUFFER:
1327 case ERROR_NO_UNICODE_TRANSLATION:
1328 default:
1329 errno = ENOENT;
1330 break;
1331 }
1332 return -1;
1333 }
1334 return 0;
1335 }
c3e9160b 1336 return -1;
03d58cca
EZ		 1337}
1338
1fd201bb 1339int
03d58cca
EZ		 1340filename_from_ansi (const char *fn_in, char *fn_out)
1341{
80fcb9d2 1342 wchar_t fn_utf16[MAX_PATH];
c3e9160b
EZ		 1343 int codepage = codepage_for_filenames (NULL);
1344 int result = MultiByteToWideChar (codepage, MB_ERR_INVALID_CHARS, fn_in, -1,
1345 fn_utf16, MAX_PATH);
1346
1347 if (!result)
1348 {
1349 DWORD err = GetLastError ();
1350
1351 switch (err)
1352 {
1353 case ERROR_INVALID_FLAGS:
1354 case ERROR_INVALID_PARAMETER:
1355 errno = EINVAL;
1356 break;
1357 case ERROR_INSUFFICIENT_BUFFER:
1358 case ERROR_NO_UNICODE_TRANSLATION:
1359 default:
1360 errno = ENOENT;
1361 break;
1362 }
1363 return -1;
1364 }
1365 return filename_from_utf16 (fn_utf16, fn_out);
03d58cca
EZ		 1366}
1367
1368\f
1369
5c4a19a9 1370/* The directory where we started, in UTF-8. */
03d58cca 1371static char startup_dir[MAX_UTF8_PATH];
00b3b7b3 1372
95ed0025 1373/* Get the current working directory. */
480b0c5b 1374char *
ec84768f 1375getcwd (char *dir, int dirsize)
95ed0025 1376{
9239d970
PE		 1377 if (!dirsize)
1378 {
1379 errno = EINVAL;
1380 return NULL;
1381 }
1382 if (dirsize <= strlen (startup_dir))
1383 {
1384 errno = ERANGE;
1385 return NULL;
1386 }
76b3903d 1387#if 0
480b0c5b
GV		 1388 if (GetCurrentDirectory (MAXPATHLEN, dir) > 0)
1389 return dir;
1390 return NULL;
76b3903d 1391#else
8d38f461
EZ		 1392 /* Emacs doesn't actually change directory itself, it stays in the
1393 same directory where it was started. */
76b3903d
GV		 1394 strcpy (dir, startup_dir);
1395 return dir;
1396#endif
95ed0025
RS		 1397}
1398
95ed0025 1399/* Emulate getloadavg. */
ad9e2d54
EZ		 1400
1401struct load_sample {
1402 time_t sample_time;
1403 ULONGLONG idle;
1404 ULONGLONG kernel;
1405 ULONGLONG user;
1406};
1407
1408/* Number of processors on this machine. */
1409static unsigned num_of_processors;
1410
1411/* We maintain 1-sec samples for the last 16 minutes in a circular buffer. */
1412static struct load_sample samples[16*60];
1413static int first_idx = -1, last_idx = -1;
1414static int max_idx = sizeof (samples) / sizeof (samples[0]);
1415
1416static int
1417buf_next (int from)
1418{
1419 int next_idx = from + 1;
1420
1421 if (next_idx >= max_idx)
1422 next_idx = 0;
1423
1424 return next_idx;
1425}
1426
1427static int
1428buf_prev (int from)
1429{
1430 int prev_idx = from - 1;
1431
1432 if (prev_idx < 0)
1433 prev_idx = max_idx - 1;
1434
1435 return prev_idx;
1436}
1437
1438static void
1439sample_system_load (ULONGLONG *idle, ULONGLONG *kernel, ULONGLONG *user)
1440{
1441 SYSTEM_INFO sysinfo;
1442 FILETIME ft_idle, ft_user, ft_kernel;
1443
1444 /* Initialize the number of processors on this machine. */
1445 if (num_of_processors <= 0)
1446 {
1447 get_native_system_info (&sysinfo);
1448 num_of_processors = sysinfo.dwNumberOfProcessors;
1449 if (num_of_processors <= 0)
1450 {
1451 GetSystemInfo (&sysinfo);
1452 num_of_processors = sysinfo.dwNumberOfProcessors;
1453 }
1454 if (num_of_processors <= 0)
1455 num_of_processors = 1;
1456 }
1457
1458 /* TODO: Take into account threads that are ready to run, by
1459 sampling the "\System\Processor Queue Length" performance
1460 counter. The code below accounts only for threads that are
1461 actually running. */
1462
1463 if (get_system_times (&ft_idle, &ft_kernel, &ft_user))
1464 {
1465 ULARGE_INTEGER uidle, ukernel, uuser;
1466
1467 memcpy (&uidle, &ft_idle, sizeof (ft_idle));
1468 memcpy (&ukernel, &ft_kernel, sizeof (ft_kernel));
1469 memcpy (&uuser, &ft_user, sizeof (ft_user));
1470 *idle = uidle.QuadPart;
1471 *kernel = ukernel.QuadPart;
1472 *user = uuser.QuadPart;
1473 }
1474 else
1475 {
1476 *idle = 0;
1477 *kernel = 0;
1478 *user = 0;
1479 }
1480}
1481
1482/* Produce the load average for a given time interval, using the
1483 samples in the samples[] array. WHICH can be 0, 1, or 2, meaning
1484 1-minute, 5-minute, or 15-minute average, respectively. */
1485static double
1486getavg (int which)
1487{
1488 double retval = -1.0;
1489 double tdiff;
1490 int idx;
1491 double span = (which == 0 ? 1.0 : (which == 1 ? 5.0 : 15.0)) * 60;
1492 time_t now = samples[last_idx].sample_time;
1493
1494 if (first_idx != last_idx)
1495 {
1496 for (idx = buf_prev (last_idx); ; idx = buf_prev (idx))
1497 {
1498 tdiff = difftime (now, samples[idx].sample_time);
1499 if (tdiff >= span - 2*DBL_EPSILON*now)
1500 {
1501 long double sys =
1502 samples[last_idx].kernel + samples[last_idx].user
1503 - (samples[idx].kernel + samples[idx].user);
1504 long double idl = samples[last_idx].idle - samples[idx].idle;
1505
1506 retval = (1.0 - idl / sys) * num_of_processors;
1507 break;
1508 }
1509 if (idx == first_idx)
1510 break;
1511 }
1512 }
1513
1514 return retval;
1515}
1516
95ed0025
RS		 1517int
1518getloadavg (double loadavg[], int nelem)
1519{
ad9e2d54
EZ		 1520 int elem;
1521 ULONGLONG idle, kernel, user;
1522 time_t now = time (NULL);
1523
1524 /* Store another sample. We ignore samples that are less than 1 sec
1525 apart. */
1526 if (difftime (now, samples[last_idx].sample_time) >= 1.0 - 2*DBL_EPSILON*now)
1527 {
1528 sample_system_load (&idle, &kernel, &user);
1529 last_idx = buf_next (last_idx);
1530 samples[last_idx].sample_time = now;
1531 samples[last_idx].idle = idle;
1532 samples[last_idx].kernel = kernel;
1533 samples[last_idx].user = user;
1534 /* If the buffer has more that 15 min worth of samples, discard
1535 the old ones. */
1536 if (first_idx == -1)
1537 first_idx = last_idx;
1538 while (first_idx != last_idx
1539 && (difftime (now, samples[first_idx].sample_time)
1540 >= 15.0*60 + 2*DBL_EPSILON*now))
1541 first_idx = buf_next (first_idx);
1542 }
95ed0025 1543
ad9e2d54 1544 for (elem = 0; elem < nelem; elem++)
95ed0025 1545 {
ad9e2d54
EZ		 1546 double avg = getavg (elem);
1547
1548 if (avg < 0)
1549 break;
1550 loadavg[elem] = avg;
95ed0025 1551 }
ad9e2d54
EZ		 1552
1553 return elem;
95ed0025
RS		 1554}
1555
480b0c5b 1556/* Emulate getpwuid, getpwnam and others. */
95ed0025 1557
051fe60d
GV		 1558#define PASSWD_FIELD_SIZE 256
1559
07f7980a
EZ		 1560static char dflt_passwd_name[PASSWD_FIELD_SIZE];
1561static char dflt_passwd_passwd[PASSWD_FIELD_SIZE];
1562static char dflt_passwd_gecos[PASSWD_FIELD_SIZE];
5c4a19a9
EZ		 1563static char dflt_passwd_dir[MAX_UTF8_PATH];
1564static char dflt_passwd_shell[MAX_UTF8_PATH];
95ed0025 1565
07f7980a 1566static struct passwd dflt_passwd =
95ed0025 1567{
07f7980a
EZ		 1568 dflt_passwd_name,
1569 dflt_passwd_passwd,
95ed0025
RS		 1570 0,
1571 0,
1572 0,
07f7980a
EZ		 1573 dflt_passwd_gecos,
1574 dflt_passwd_dir,
1575 dflt_passwd_shell,
95ed0025
RS		 1576};
1577
07f7980a
EZ		 1578static char dflt_group_name[GNLEN+1];
1579
1580static struct group dflt_group =
3d19b645 1581{
07f7980a
EZ		 1582 /* When group information is not available, we return this as the
1583 group for all files. */
1584 dflt_group_name,
1585 0,
3d19b645
LH		 1586};
1587
22749e9a 1588unsigned
b56ceb92 1589getuid (void)
177c0ea7 1590{
07f7980a 1591 return dflt_passwd.pw_uid;
480b0c5b
GV		 1592}
1593
22749e9a 1594unsigned
b56ceb92 1595geteuid (void)
177c0ea7 1596{
480b0c5b
GV		 1597 /* I could imagine arguing for checking to see whether the user is
1598 in the Administrators group and returning a UID of 0 for that
1599 case, but I don't know how wise that would be in the long run. */
177c0ea7 1600 return getuid ();
480b0c5b
GV		 1601}
1602
22749e9a 1603unsigned
b56ceb92 1604getgid (void)
177c0ea7 1605{
07f7980a 1606 return dflt_passwd.pw_gid;
480b0c5b
GV		 1607}
1608
22749e9a 1609unsigned
b56ceb92 1610getegid (void)
177c0ea7 1611{
480b0c5b
GV		 1612 return getgid ();
1613}
1614
95ed0025 1615struct passwd *
22749e9a 1616getpwuid (unsigned uid)
95ed0025 1617{
07f7980a
EZ		 1618 if (uid == dflt_passwd.pw_uid)
1619 return &dflt_passwd;
480b0c5b 1620 return NULL;
95ed0025
RS		 1621}
1622
3d19b645
LH		 1623struct group *
1624getgrgid (gid_t gid)
1625{
07f7980a 1626 return &dflt_group;
3d19b645
LH		 1627}
1628
95ed0025
RS		 1629struct passwd *
1630getpwnam (char *name)
1631{
1632 struct passwd *pw;
177c0ea7 1633
95ed0025
RS		 1634 pw = getpwuid (getuid ());
1635 if (!pw)
1636 return pw;
1637
05131107 1638 if (xstrcasecmp (name, pw->pw_name))
95ed0025
RS		 1639 return NULL;
1640
1641 return pw;
1642}
1643
bedf4aab 1644static void
b56ceb92 1645init_user_info (void)
95ed0025 1646{
480b0c5b
GV		 1647 /* Find the user's real name by opening the process token and
1648 looking up the name associated with the user-sid in that token.
1649
1650 Use the relative portion of the identifier authority value from
1651 the user-sid as the user id value (same for group id using the
1652 primary group sid from the process token). */
1653
07f7980a 1654 char uname[UNLEN+1], gname[GNLEN+1], domain[1025];
32cef06e 1655 DWORD ulength = sizeof (uname), dlength = sizeof (domain), needed;
07f7980a 1656 DWORD glength = sizeof (gname);
10aabbf9
JB		 1657 HANDLE token = NULL;
1658 SID_NAME_USE user_type;
32cef06e
EZ		 1659 unsigned char *buf = NULL;
1660 DWORD blen = 0;
634d3003
EZ		 1661 TOKEN_USER user_token;
1662 TOKEN_PRIMARY_GROUP group_token;
32cef06e 1663 BOOL result;
10aabbf9 1664
32cef06e
EZ		 1665 result = open_process_token (GetCurrentProcess (), TOKEN_QUERY, &token);
1666 if (result)
1667 {
1668 result = get_token_information (token, TokenUser, NULL, 0, &blen);
1669 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
1670 {
1671 buf = xmalloc (blen);
1672 result = get_token_information (token, TokenUser,
1673 (LPVOID)buf, blen, &needed);
1674 if (result)
1675 {
1676 memcpy (&user_token, buf, sizeof (user_token));
1677 result = lookup_account_sid (NULL, user_token.User.Sid,
1678 uname, &ulength,
1679 domain, &dlength, &user_type);
1680 }
1681 }
1682 else
1683 result = FALSE;
1684 }
1685 if (result)
d1c1c3d2 1686 {
07f7980a 1687 strcpy (dflt_passwd.pw_name, uname);
c617afce 1688 /* Determine a reasonable uid value. */
05131107 1689 if (xstrcasecmp ("administrator", uname) == 0)
480b0c5b 1690 {
07f7980a
EZ		 1691 dflt_passwd.pw_uid = 500; /* well-known Administrator uid */
1692 dflt_passwd.pw_gid = 513; /* well-known None gid */
480b0c5b
GV		 1693 }
1694 else
1695 {
ce0ee994
EZ		 1696 /* Use the last sub-authority value of the RID, the relative
1697 portion of the SID, as user/group ID. */
8aaaec6b 1698 dflt_passwd.pw_uid = get_rid (user_token.User.Sid);
480b0c5b 1699
8aaaec6b 1700 /* Get group id and name. */
32cef06e
EZ		 1701 result = get_token_information (token, TokenPrimaryGroup,
1702 (LPVOID)buf, blen, &needed);
1703 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
1704 {
1705 buf = xrealloc (buf, blen = needed);
1706 result = get_token_information (token, TokenPrimaryGroup,
1707 (LPVOID)buf, blen, &needed);
1708 }
1709 if (result)
480b0c5b 1710 {
634d3003 1711 memcpy (&group_token, buf, sizeof (group_token));
8aaaec6b 1712 dflt_passwd.pw_gid = get_rid (group_token.PrimaryGroup);
07f7980a 1713 dlength = sizeof (domain);
32cef06e
EZ		 1714 /* If we can get at the real Primary Group name, use that.
1715 Otherwise, the default group name was already set to
1716 "None" in globals_of_w32. */
07f7980a
EZ		 1717 if (lookup_account_sid (NULL, group_token.PrimaryGroup,
1718 gname, &glength, NULL, &dlength,
1719 &user_type))
1720 strcpy (dflt_group_name, gname);
480b0c5b
GV		 1721 }
1722 else
07f7980a 1723 dflt_passwd.pw_gid = dflt_passwd.pw_uid;
480b0c5b
GV		 1724 }
1725 }
1726 /* If security calls are not supported (presumably because we
32cef06e 1727 are running under Windows 9X), fallback to this: */
07f7980a 1728 else if (GetUserName (uname, &ulength))
480b0c5b 1729 {
07f7980a 1730 strcpy (dflt_passwd.pw_name, uname);
05131107 1731 if (xstrcasecmp ("administrator", uname) == 0)
07f7980a 1732 dflt_passwd.pw_uid = 0;
480b0c5b 1733 else
07f7980a
EZ		 1734 dflt_passwd.pw_uid = 123;
1735 dflt_passwd.pw_gid = dflt_passwd.pw_uid;
480b0c5b
GV		 1736 }
1737 else
1738 {
07f7980a
EZ		 1739 strcpy (dflt_passwd.pw_name, "unknown");
1740 dflt_passwd.pw_uid = 123;
1741 dflt_passwd.pw_gid = 123;
d1c1c3d2 1742 }
07f7980a 1743 dflt_group.gr_gid = dflt_passwd.pw_gid;
95ed0025 1744
480b0c5b 1745 /* Set dir and shell from environment variables. */
5c4a19a9
EZ		 1746 if (w32_unicode_filenames)
1747 {
1748 wchar_t *home = _wgetenv (L"HOME");
1749 wchar_t *shell = _wgetenv (L"SHELL");
1750
1751 /* Ensure HOME and SHELL are defined. */
1752 if (home == NULL)
1753 emacs_abort ();
1754 if (shell == NULL)
1755 emacs_abort ();
1756 filename_from_utf16 (home, dflt_passwd.pw_dir);
1757 filename_from_utf16 (shell, dflt_passwd.pw_shell);
1758 }
1759 else
1760 {
1761 char *home = getenv ("HOME");
1762 char *shell = getenv ("SHELL");
1763
1764 if (home == NULL)
1765 emacs_abort ();
1766 if (shell == NULL)
1767 emacs_abort ();
1768 filename_from_ansi (home, dflt_passwd.pw_dir);
1769 filename_from_ansi (shell, dflt_passwd.pw_shell);
1770 }
bd4a449f 1771
32cef06e 1772 xfree (buf);
480b0c5b
GV		 1773 if (token)
1774 CloseHandle (token);
95ed0025
RS		 1775}
1776
95ed0025 1777int
b56ceb92 1778random (void)
95ed0025 1779{
480b0c5b
GV		 1780 /* rand () on NT gives us 15 random bits...hack together 30 bits. */
1781 return ((rand () << 15) | rand ());
95ed0025
RS		 1782}
1783
95ed0025 1784void
480b0c5b 1785srandom (int seed)
95ed0025 1786{
480b0c5b 1787 srand (seed);
95ed0025
RS		 1788}
1789
6d2851de
EZ		 1790/* Return the maximum length in bytes of a multibyte character
1791 sequence encoded in the current ANSI codepage. This is required to
1792 correctly walk the encoded file names one character at a time. */
1793static int
1794max_filename_mbslen (void)
1795{
c3e9160b 1796 CPINFO cp_info;
6d2851de 1797
c3e9160b
EZ		 1798 codepage_for_filenames (&cp_info);
1799 return cp_info.MaxCharSize;
6d2851de 1800}
76b3903d 1801
1fd201bb
EZ		 1802/* Normalize filename by converting in-place all of its path
1803 separators to the separator specified by PATH_SEP. */
cbe39279
RS		 1804
1805static void
1fd201bb 1806normalize_filename (register char *fp, char path_sep)
cbe39279 1807{
1fd201bb 1808 char *p2;
e7ac588e 1809
5162ffce
MB		 1810 /* Always lower-case drive letters a-z, even if the filesystem
1811 preserves case in filenames.
1812 This is so filenames can be compared by string comparison
1813 functions that are case-sensitive. Even case-preserving filesystems
1814 do not distinguish case in drive letters. */
1fd201bb 1815 p2 = fp + 1;
6d2851de
EZ		 1816
1817 if (*p2 == ':' && *fp >= 'A' && *fp <= 'Z')
5162ffce
MB		 1818 {
1819 *fp += 'a' - 'A';
1820 fp += 2;
1821 }
1822
1fd201bb 1823 while (*fp)
cbe39279 1824 {
1fd201bb
EZ		 1825 if (*fp == '/' || *fp == '\\')
1826 *fp = path_sep;
1827 fp++;
cbe39279 1828 }
cbe39279
RS		 1829}
1830
1fd201bb 1831/* Destructively turn backslashes into slashes. */
95ed0025 1832void
1fd201bb 1833dostounix_filename (register char *p)
95ed0025 1834{
1fd201bb 1835 normalize_filename (p, '/');
95ed0025
RS		 1836}
1837
480b0c5b 1838/* Destructively turn slashes into backslashes. */
95ed0025 1839void
b56ceb92 1840unixtodos_filename (register char *p)
95ed0025 1841{
1fd201bb 1842 normalize_filename (p, '\\');
95ed0025
RS		 1843}
1844
480b0c5b
GV		 1845/* Remove all CR's that are followed by a LF.
1846 (From msdos.c...probably should figure out a way to share it,
1847 although this code isn't going to ever change.) */
bedf4aab 1848static int
b56ceb92 1849crlf_to_lf (register int n, register unsigned char *buf)
35f0d482 1850{
480b0c5b
GV		 1851 unsigned char *np = buf;
1852 unsigned char *startp = buf;
1853 unsigned char *endp = buf + n;
35f0d482 1854
480b0c5b
GV		 1855 if (n == 0)
1856 return n;
1857 while (buf < endp - 1)
95ed0025 1858 {
480b0c5b
GV		 1859 if (*buf == 0x0d)
1860 {
1861 if (*(++buf) != 0x0a)
1862 *np++ = 0x0d;
1863 }
1864 else
1865 *np++ = *buf++;
95ed0025 1866 }
480b0c5b
GV		 1867 if (buf < endp)
1868 *np++ = *buf++;
1869 return np - startp;
95ed0025
RS		 1870}
1871
76b3903d
GV		 1872/* Parse the root part of file name, if present. Return length and
1873 optionally store pointer to char after root. */
1874static int
f5441ba4 1875parse_root (const char * name, const char ** pPath)
76b3903d 1876{
f5441ba4 1877 const char * start = name;
76b3903d
GV		 1878
1879 if (name == NULL)
1880 return 0;
1881
1882 /* find the root name of the volume if given */
1883 if (isalpha (name[0]) && name[1] == ':')
1884 {
1885 /* skip past drive specifier */
1886 name += 2;
1887 if (IS_DIRECTORY_SEP (name[0]))
1888 name++;
1889 }
1890 else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1]))
1891 {
1892 int slashes = 2;
806fed21 1893
76b3903d
GV		 1894 name += 2;
1895 do
1896 {
1897 if (IS_DIRECTORY_SEP (*name) && --slashes == 0)
1898 break;
1fd201bb 1899 name++;
76b3903d
GV		 1900 }
1901 while ( *name );
1902 if (IS_DIRECTORY_SEP (name[0]))
1903 name++;
1904 }
1905
1906 if (pPath)
1907 *pPath = name;
1908
1909 return name - start;
1910}
1911
1912/* Get long base name for name; name is assumed to be absolute. */
1913static int
1914get_long_basename (char * name, char * buf, int size)
1915{
76b3903d 1916 HANDLE dir_handle;
1fd201bb 1917 char fname_utf8[MAX_UTF8_PATH];
76b3903d 1918 int len = 0;
1fd201bb 1919 int cstatus;
76b3903d 1920
1fd201bb
EZ		 1921 /* Must be valid filename, no wild cards or other invalid characters. */
1922 if (strpbrk (name, "*?|<>\""))
bb1584c8
RS		 1923 return 0;
1924
1fd201bb 1925 if (w32_unicode_filenames)
76b3903d 1926 {
1fd201bb
EZ		 1927 wchar_t fname_utf16[MAX_PATH];
1928 WIN32_FIND_DATAW find_data_wide;
1929
1930 filename_to_utf16 (name, fname_utf16);
1931 dir_handle = FindFirstFileW (fname_utf16, &find_data_wide);
1932 if (dir_handle != INVALID_HANDLE_VALUE)
1933 cstatus = filename_from_utf16 (find_data_wide.cFileName, fname_utf8);
1934 }
1935 else
1936 {
1937 char fname_ansi[MAX_PATH];
1938 WIN32_FIND_DATAA find_data_ansi;
1939
1940 filename_to_ansi (name, fname_ansi);
1941 dir_handle = FindFirstFileA (fname_ansi, &find_data_ansi);
1942 if (dir_handle != INVALID_HANDLE_VALUE)
1943 cstatus = filename_from_ansi (find_data_ansi.cFileName, fname_utf8);
76b3903d 1944 }
1fd201bb
EZ		 1945
1946 if (cstatus == 0 && (len = strlen (fname_utf8)) < size)
1947 memcpy (buf, fname_utf8, len + 1);
1948 else
1949 len = 0;
1950
1951 if (dir_handle != INVALID_HANDLE_VALUE)
1952 FindClose (dir_handle);
1953
76b3903d
GV		 1954 return len;
1955}
1956
1957/* Get long name for file, if possible (assumed to be absolute). */
1958BOOL
1959w32_get_long_filename (char * name, char * buf, int size)
1960{
1961 char * o = buf;
1962 char * p;
f5441ba4 1963 const char * q;
1fd201bb 1964 char full[ MAX_UTF8_PATH ];
76b3903d
GV		 1965 int len;
1966
1967 len = strlen (name);
1fd201bb 1968 if (len >= MAX_UTF8_PATH)
76b3903d
GV		 1969 return FALSE;
1970
1971 /* Use local copy for destructive modification. */
1972 memcpy (full, name, len+1);
1973 unixtodos_filename (full);
1974
1975 /* Copy root part verbatim. */
f5441ba4 1976 len = parse_root (full, (const char **)&p);
76b3903d
GV		 1977 memcpy (o, full, len);
1978 o += len;
4f8ac0b2 1979 *o = '\0';
76b3903d
GV		 1980 size -= len;
1981
4f8ac0b2 1982 while (p != NULL && *p)
76b3903d
GV		 1983 {
1984 q = p;
1fd201bb 1985 p = strchr (q, '\\');
76b3903d
GV		 1986 if (p) *p = '\0';
1987 len = get_long_basename (full, o, size);
1988 if (len > 0)
1989 {
1990 o += len;
1991 size -= len;
1992 if (p != NULL)
1993 {
1994 *p++ = '\\';
1995 if (size < 2)
1996 return FALSE;
1997 *o++ = '\\';
1998 size--;
1999 *o = '\0';
2000 }
2001 }
2002 else
2003 return FALSE;
2004 }
76b3903d
GV		 2005
2006 return TRUE;
2007}
2008
1fd201bb
EZ		 2009unsigned int
2010w32_get_short_filename (char * name, char * buf, int size)
2011{
2012 if (w32_unicode_filenames)
2013 {
2014 wchar_t name_utf16[MAX_PATH], short_name[MAX_PATH];
2015 unsigned int retval;
2016
2017 filename_to_utf16 (name, name_utf16);
2018 retval = GetShortPathNameW (name_utf16, short_name, size);
2019 if (retval && retval < size)
2020 filename_from_utf16 (short_name, buf);
2021 return retval;
2022 }
2023 else
2024 {
2025 char name_ansi[MAX_PATH];
2026
2027 filename_to_ansi (name, name_ansi);
2028 return GetShortPathNameA (name_ansi, buf, size);
2029 }
2030}
2031
bedf4aab 2032static int
9d3355d1
GV		 2033is_unc_volume (const char *filename)
2034{
2035 const char *ptr = filename;
2036
2037 if (!IS_DIRECTORY_SEP (ptr[0]) || !IS_DIRECTORY_SEP (ptr[1]) || !ptr[2])
2038 return 0;
2039
b1846422 2040 if (strpbrk (ptr + 2, "*?|<>\"\\/"))
9d3355d1
GV		 2041 return 0;
2042
2043 return 1;
2044}
76b3903d 2045
75ceee05
EZ		 2046/* Emulate the Posix unsetenv. */
2047int
2048unsetenv (const char *name)
2049{
2050 char *var;
2051 size_t name_len;
2052 int retval;
2053
2054 if (name == NULL || *name == '\0' || strchr (name, '=') != NULL)
2055 {
2056 errno = EINVAL;
2057 return -1;
2058 }
2059 name_len = strlen (name);
2060 /* MS docs says an environment variable cannot be longer than 32K. */
2061 if (name_len > 32767)
2062 {
2063 errno = ENOMEM;
a16e75cd 2064 return 0;
75ceee05
EZ		 2065 }
2066 /* It is safe to use 'alloca' with 32K size, since the stack is at
2067 least 2MB, and we set it to 8MB in the link command line. */
2068 var = alloca (name_len + 2);
a7f11948 2069 strncpy (var, name, name_len);
75ceee05
EZ		 2070 var[name_len++] = '=';
2071 var[name_len] = '\0';
2072 return _putenv (var);
2073}
2074
2075/* MS _putenv doesn't support removing a variable when the argument
2076 does not include the '=' character, so we fix that here. */
2077int
2078sys_putenv (char *str)
2079{
2080 const char *const name_end = strchr (str, '=');
2081
2082 if (name_end == NULL)
2083 {
2084 /* Remove the variable from the environment. */
2085 return unsetenv (str);
2086 }
2087
2088 return _putenv (str);
2089}
2090
480b0c5b 2091#define REG_ROOT "SOFTWARE\\GNU\\Emacs"
f332b293 2092
177c0ea7 2093LPBYTE
b56ceb92 2094w32_get_resource (char *key, LPDWORD lpdwtype)
f332b293
GV		 2095{
2096 LPBYTE lpvalue;
2097 HKEY hrootkey = NULL;
2098 DWORD cbData;
177c0ea7
JB		 2099
2100 /* Check both the current user and the local machine to see if
f332b293 2101 we have any resources. */
177c0ea7 2102
f332b293
GV		 2103 if (RegOpenKeyEx (HKEY_CURRENT_USER, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS)
2104 {
2105 lpvalue = NULL;
2106
177c0ea7 2107 if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS
23f86fce 2108 && (lpvalue = xmalloc (cbData)) != NULL
f332b293
GV		 2109 && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS)
2110 {
4da4d9bb 2111 RegCloseKey (hrootkey);
f332b293
GV		 2112 return (lpvalue);
2113 }
2114
70fdbb46 2115 xfree (lpvalue);
177c0ea7 2116
f332b293 2117 RegCloseKey (hrootkey);
177c0ea7
JB		 2118 }
2119
f332b293
GV		 2120 if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS)
2121 {
2122 lpvalue = NULL;
177c0ea7 2123
76b3903d 2124 if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS
23f86fce 2125 && (lpvalue = xmalloc (cbData)) != NULL
76b3903d 2126 && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS)
f332b293 2127 {
4da4d9bb 2128 RegCloseKey (hrootkey);
f332b293
GV		 2129 return (lpvalue);
2130 }
177c0ea7 2131
70fdbb46 2132 xfree (lpvalue);
177c0ea7 2133
f332b293 2134 RegCloseKey (hrootkey);
177c0ea7
JB		 2135 }
2136
f332b293
GV		 2137 return (NULL);
2138}
2139
2140void
aa7b87b0 2141init_environment (char ** argv)
f332b293 2142{
b3308d2e
KH		 2143 static const char * const tempdirs[] = {
2144 "$TMPDIR", "$TEMP", "$TMP", "c:/"
2145 };
2d5324c5 2146
b3308d2e 2147 int i;
2d5324c5 2148
b3308d2e
KH		 2149 const int imax = sizeof (tempdirs) / sizeof (tempdirs[0]);
2150
b1846422
EZ		 2151 /* Implementation note: This function explicitly works with ANSI
2152 file names, not with UTF-8 encoded file names. This is because
2153 this function pushes variables into the Emacs's environment, and
2154 the environment variables are always assumed to be in the
2155 locale-specific encoding. Do NOT call any functions that accept
2156 UTF-8 file names from this function! */
2157
b3308d2e
KH		 2158 /* Make sure they have a usable $TMPDIR. Many Emacs functions use
2159 temporary files and assume "/tmp" if $TMPDIR is unset, which
2160 will break on DOS/Windows. Refuse to work if we cannot find
2161 a directory, not even "c:/", usable for that purpose. */
2162 for (i = 0; i < imax ; i++)
2163 {
2164 const char *tmp = tempdirs[i];
2165
2166 if (*tmp == '$')
2167 tmp = getenv (tmp + 1);
2168 /* Note that `access' can lie to us if the directory resides on a
2169 read-only filesystem, like CD-ROM or a write-protected floppy.
2170 The only way to be really sure is to actually create a file and
2171 see if it succeeds. But I think that's too much to ask. */
6dad7178 2172
b1846422
EZ		 2173 /* MSVCRT's _access crashes with D_OK, so we use our replacement. */
2174 if (tmp && sys_access (tmp, D_OK) == 0)
b3308d2e
KH		 2175 {
2176 char * var = alloca (strlen (tmp) + 8);
2177 sprintf (var, "TMPDIR=%s", tmp);
aca583b2 2178 _putenv (strdup (var));
b3308d2e
KH		 2179 break;
2180 }
2181 }
2182 if (i >= imax)
2183 cmd_error_internal
2184 (Fcons (Qerror,
2185 Fcons (build_string ("no usable temporary directories found!!"),
2186 Qnil)),
2187 "While setting TMPDIR: ");
2188
ca149beb
AI		 2189 /* Check for environment variables and use registry settings if they
2190 don't exist. Fallback on default values where applicable. */
f332b293 2191 {
480b0c5b
GV		 2192 int i;
2193 LPBYTE lpval;
2194 DWORD dwType;
69fb0241 2195 char locale_name[32];
2d5324c5 2196 char default_home[MAX_PATH];
fdc5744d 2197 int appdata = 0;
f332b293 2198
e00b99c8 2199 static const struct env_entry
ca149beb
AI		 2200 {
2201 char * name;
2202 char * def_value;
e00b99c8 2203 } dflt_envvars[] =
ca149beb 2204 {
76151e2c
EZ		 2205 /* If the default value is NULL, we will use the value from the
2206 outside environment or the Registry, but will not push the
2207 variable into the Emacs environment if it is defined neither
2208 in the Registry nor in the outside environment. */
ca149beb
AI		 2209 {"HOME", "C:/"},
2210 {"PRELOAD_WINSOCK", NULL},
2211 {"emacs_dir", "C:/emacs"},
76151e2c 2212 {"EMACSLOADPATH", NULL},
7d9fb4de 2213 {"SHELL", "cmdproxy.exe"}, /* perhaps it is somewhere on PATH */
76151e2c
EZ		 2214 {"EMACSDATA", NULL},
2215 {"EMACSPATH", NULL},
2216 {"INFOPATH", NULL},
2217 {"EMACSDOC", NULL},
69fb0241
JR		 2218 {"TERM", "cmd"},
2219 {"LANG", NULL},
480b0c5b
GV		 2220 };
2221
ed3751c8 2222#define N_ENV_VARS sizeof (dflt_envvars)/sizeof (dflt_envvars[0])
e00b99c8
EZ		 2223
2224 /* We need to copy dflt_envvars[] and work on the copy because we
2225 don't want the dumped Emacs to inherit the values of
2226 environment variables we saw during dumping (which could be on
2227 a different system). The defaults above must be left intact. */
2228 struct env_entry env_vars[N_ENV_VARS];
2229
2230 for (i = 0; i < N_ENV_VARS; i++)
2231 env_vars[i] = dflt_envvars[i];
2232
2d5324c5
JR		 2233 /* For backwards compatibility, check if a .emacs file exists in C:/
2234 If not, then we can try to default to the appdata directory under the
2235 user's profile, which is more likely to be writable. */
b1846422 2236 if (sys_access ("C:/.emacs", F_OK) != 0)
94eab1c8
JB		 2237 {
2238 HRESULT profile_result;
2239 /* Dynamically load ShGetFolderPath, as it won't exist on versions
2240 of Windows 95 and NT4 that have not been updated to include
2241 MSIE 5. */
2242 ShGetFolderPath_fn get_folder_path;
2243 get_folder_path = (ShGetFolderPath_fn)
2244 GetProcAddress (GetModuleHandle ("shell32.dll"), "SHGetFolderPathA");
2245
2246 if (get_folder_path != NULL)
2247 {
2248 profile_result = get_folder_path (NULL, CSIDL_APPDATA, NULL,
2249 0, default_home);
2d5324c5 2250
94eab1c8
JB		 2251 /* If we can't get the appdata dir, revert to old behavior. */
2252 if (profile_result == S_OK)
fdc5744d
JB		 2253 {
2254 env_vars[0].def_value = default_home;
2255 appdata = 1;
2256 }
94eab1c8
JB		 2257 }
2258 }
2d5324c5 2259
69fb0241
JR		 2260 /* Get default locale info and use it for LANG. */
2261 if (GetLocaleInfo (LOCALE_USER_DEFAULT,
2262 LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP,
2263 locale_name, sizeof (locale_name)))
2264 {
e00b99c8 2265 for (i = 0; i < N_ENV_VARS; i++)
69fb0241
JR		 2266 {
2267 if (strcmp (env_vars[i].name, "LANG") == 0)
2268 {
2269 env_vars[i].def_value = locale_name;
2270 break;
2271 }
2272 }
2273 }
2274
ca149beb
AI		 2275#define SET_ENV_BUF_SIZE (4 * MAX_PATH) /* to cover EMACSLOADPATH */
2276
2277 /* Treat emacs_dir specially: set it unconditionally based on our
76151e2c 2278 location. */
ca149beb
AI		 2279 {
2280 char *p;
2281 char modname[MAX_PATH];
2282
2283 if (!GetModuleFileName (NULL, modname, MAX_PATH))
1088b922 2284 emacs_abort ();
6ee4509a 2285 if ((p = _mbsrchr (modname, '\\')) == NULL)
1088b922 2286 emacs_abort ();
ca149beb
AI		 2287 *p = 0;
2288
7d9fb4de
EZ		 2289 if ((p = _mbsrchr (modname, '\\'))
2290 /* From bin means installed Emacs, from src means uninstalled. */
2291 && (xstrcasecmp (p, "\\bin") == 0 || xstrcasecmp (p, "\\src") == 0))
ca149beb
AI		 2292 {
2293 char buf[SET_ENV_BUF_SIZE];
7d9fb4de 2294 int within_build_tree = xstrcasecmp (p, "\\src") == 0;
ca149beb
AI		 2295
2296 *p = 0;
6ee4509a 2297 for (p = modname; *p; p = CharNext (p))
ca149beb 2298 if (*p == '\\') *p = '/';
177c0ea7 2299
ed3751c8 2300 _snprintf (buf, sizeof (buf)-1, "emacs_dir=%s", modname);
a302c7ae 2301 _putenv (strdup (buf));
7d9fb4de
EZ		 2302 /* If we are running from the Posix-like build tree, define
2303 SHELL to point to our own cmdproxy. The loop below will
2304 then disregard PATH_EXEC and the default value. */
2305 if (within_build_tree)
2306 {
2307 _snprintf (buf, sizeof (buf) - 1,
2308 "SHELL=%s/nt/cmdproxy.exe", modname);
2309 _putenv (strdup (buf));
2310 }
ca149beb
AI		 2311 }
2312 }
2313
e00b99c8 2314 for (i = 0; i < N_ENV_VARS; i++)
f332b293 2315 {
ca149beb 2316 if (!getenv (env_vars[i].name))
480b0c5b 2317 {
ca149beb 2318 int dont_free = 0;
7d9fb4de 2319 char bufc[SET_ENV_BUF_SIZE];
480b0c5b 2320
aa5ee2a3
JB		 2321 if ((lpval = w32_get_resource (env_vars[i].name, &dwType)) == NULL
2322 /* Also ignore empty environment variables. */
2323 || *lpval == 0)
ca149beb 2324 {
70fdbb46 2325 xfree (lpval);
ca149beb 2326 dont_free = 1;
7d9fb4de
EZ		 2327 if (strcmp (env_vars[i].name, "SHELL") == 0)
2328 {
2329 /* Look for cmdproxy.exe in every directory in
2330 PATH_EXEC. FIXME: This does not find cmdproxy
2331 in nt/ when we run uninstalled. */
2332 char fname[MAX_PATH];
2333 const char *pstart = PATH_EXEC, *pend;
2334
2335 do {
2336 pend = _mbschr (pstart, ';');
2337 if (!pend)
2338 pend = pstart + strlen (pstart);
2339 /* Be defensive against series of ;;; characters. */
2340 if (pend > pstart)
2341 {
2342 strncpy (fname, pstart, pend - pstart);
2343 fname[pend - pstart] = '/';
2344 strcpy (&fname[pend - pstart + 1], "cmdproxy.exe");
2345 ExpandEnvironmentStrings ((LPSTR) fname, bufc,
2346 sizeof (bufc));
b1846422 2347 if (sys_access (bufc, F_OK) == 0)
7d9fb4de
EZ		 2348 {
2349 lpval = bufc;
2350 dwType = REG_SZ;
2351 break;
2352 }
2353 }
2354 if (*pend)
2355 pstart = pend + 1;
2356 else
2357 pstart = pend;
2358 if (!*pstart)
2359 {
2360 /* If not found in any directory, use the
2361 default as the last resort. */
2362 lpval = env_vars[i].def_value;
2363 dwType = REG_EXPAND_SZ;
2364 }
2365 } while (*pstart);
2366 }
2367 else
2368 {
2369 lpval = env_vars[i].def_value;
2370 dwType = REG_EXPAND_SZ;
2371 }
2372 if (strcmp (env_vars[i].name, "HOME") == 0 && !appdata)
3438fe21
EZ		 2373 Vdelayed_warnings_list
2374 = Fcons (listn (CONSTYPE_HEAP, 2,
073c88c2 2375 intern ("initialization"),
694b6c97 2376 build_string ("Setting HOME to C:\\ by default is deprecated")),
073c88c2 2377 Vdelayed_warnings_list);
480b0c5b 2378 }
ca149beb
AI		 2379
2380 if (lpval)
480b0c5b 2381 {
892eb237 2382 char buf1[SET_ENV_BUF_SIZE], buf2[SET_ENV_BUF_SIZE];
ca149beb 2383
892eb237 2384 if (dwType == REG_EXPAND_SZ)
ed3751c8 2385 ExpandEnvironmentStrings ((LPSTR) lpval, buf1, sizeof (buf1));
ca149beb 2386 else if (dwType == REG_SZ)
892eb237
EZ		 2387 strcpy (buf1, lpval);
2388 if (dwType == REG_EXPAND_SZ || dwType == REG_SZ)
ca149beb 2389 {
ed3751c8 2390 _snprintf (buf2, sizeof (buf2)-1, "%s=%s", env_vars[i].name,
892eb237
EZ		 2391 buf1);
2392 _putenv (strdup (buf2));
ca149beb 2393 }
f332b293 2394
ca149beb
AI		 2395 if (!dont_free)
2396 xfree (lpval);
2397 }
480b0c5b
GV		 2398 }
2399 }
2400 }
2401
75b08edb
GV		 2402 /* Rebuild system configuration to reflect invoking system. */
2403 Vsystem_configuration = build_string (EMACS_CONFIGURATION);
2404
76b3903d
GV		 2405 /* Another special case: on NT, the PATH variable is actually named
2406 "Path" although cmd.exe (perhaps NT itself) arranges for
2407 environment variable lookup and setting to be case insensitive.
2408 However, Emacs assumes a fully case sensitive environment, so we
2409 need to change "Path" to "PATH" to match the expectations of
2410 various elisp packages. We do this by the sneaky method of
2411 modifying the string in the C runtime environ entry.
2412
2413 The same applies to COMSPEC. */
2414 {
2415 char ** envp;
2416
2417 for (envp = environ; *envp; envp++)
2418 if (_strnicmp (*envp, "PATH=", 5) == 0)
2419 memcpy (*envp, "PATH=", 5);
2420 else if (_strnicmp (*envp, "COMSPEC=", 8) == 0)
2421 memcpy (*envp, "COMSPEC=", 8);
2422 }
2423
9239d970 2424 /* Remember the initial working directory for getcwd. */
6dad7178
EZ		 2425 /* FIXME: Do we need to resolve possible symlinks in startup_dir?
2426 Does it matter anywhere in Emacs? */
5c4a19a9
EZ		 2427 if (w32_unicode_filenames)
2428 {
2429 wchar_t wstartup_dir[MAX_PATH];
2430
2431 if (!GetCurrentDirectoryW (MAX_PATH, wstartup_dir))
2432 emacs_abort ();
2433 filename_from_utf16 (wstartup_dir, startup_dir);
2434 }
2435 else
2436 {
2437 char astartup_dir[MAX_PATH];
2438
2439 if (!GetCurrentDirectoryA (MAX_PATH, astartup_dir))
2440 emacs_abort ();
2441 filename_from_ansi (astartup_dir, startup_dir);
2442 }
76b3903d
GV		 2443
2444 {
aa7b87b0 2445 static char modname[MAX_PATH];
76b3903d
GV		 2446
2447 if (!GetModuleFileName (NULL, modname, MAX_PATH))
1088b922 2448 emacs_abort ();
aa7b87b0 2449 argv[0] = modname;
76b3903d
GV		 2450 }
2451
20af4831
JR		 2452 /* Determine if there is a middle mouse button, to allow parse_button
2453 to decide whether right mouse events should be mouse-2 or
2454 mouse-3. */
e0c181dd 2455 w32_num_mouse_buttons = GetSystemMetrics (SM_CMOUSEBUTTONS);
20af4831 2456
480b0c5b
GV		 2457 init_user_info ();
2458}
2459
6dad7178
EZ		 2460/* Called from expand-file-name when default-directory is not a string. */
2461
bf794306
EZ		 2462char *
2463emacs_root_dir (void)
2464{
b1846422 2465 static char root_dir[MAX_UTF8_PATH];
bf794306
EZ		 2466 const char *p;
2467
2468 p = getenv ("emacs_dir");
2469 if (p == NULL)
1088b922 2470 emacs_abort ();
b1846422 2471 filename_from_ansi (p, root_dir);
bf794306 2472 root_dir[parse_root (root_dir, NULL)] = '\0';
1fd201bb 2473 dostounix_filename (root_dir);
bf794306
EZ		 2474 return root_dir;
2475}
2476
35f0d482
KH		 2477#include <sys/timeb.h>
2478
2479/* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */
97dababa 2480int
e2d8a6f0 2481gettimeofday (struct timeval *__restrict tv, struct timezone *__restrict tz)
35f0d482 2482{
6e602566 2483 struct _timeb tb;
35f0d482
KH		 2484 _ftime (&tb);
2485
2486 tv->tv_sec = tb.time;
2487 tv->tv_usec = tb.millitm * 1000L;
97a93095
EZ		 2488 /* Implementation note: _ftime sometimes doesn't update the dstflag
2489 according to the new timezone when the system timezone is
2490 changed. We could fix that by using GetSystemTime and
2491 GetTimeZoneInformation, but that doesn't seem necessary, since
2492 Emacs always calls gettimeofday with the 2nd argument NULL (see
e9a9ae03 2493 current_emacs_time). */
177c0ea7 2494 if (tz)
35f0d482
KH		 2495 {
2496 tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */
2497 tz->tz_dsttime = tb.dstflag; /* type of dst correction */
2498 }
97dababa 2499 return 0;
35f0d482 2500}
35f0d482 2501
388cdec0
EZ		 2502/* Emulate fdutimens. */
2503
2504/* Set the access and modification time stamps of FD (a.k.a. FILE) to be
2505 TIMESPEC[0] and TIMESPEC[1], respectively.
2506 FD must be either negative -- in which case it is ignored --
2507 or a file descriptor that is open on FILE.
2508 If FD is nonnegative, then FILE can be NULL, which means
2509 use just futimes instead of utimes.
2510 If TIMESPEC is null, FAIL.
2511 Return 0 on success, -1 (setting errno) on failure. */
2512
2513int
2514fdutimens (int fd, char const *file, struct timespec const timespec[2])
2515{
388cdec0
EZ		 2516 if (!timespec)
2517 {
2518 errno = ENOSYS;
2519 return -1;
2520 }
2521 if (fd < 0 && !file)
2522 {
2523 errno = EBADF;
2524 return -1;
2525 }
b34454d0
EZ		 2526 /* _futime's prototype defines 2nd arg as having the type 'struct
2527 _utimbuf', while utime needs to accept 'struct utimbuf' for
2528 compatibility with Posix. So we need to use 2 different (but
2529 equivalent) types to avoid compiler warnings, sigh. */
388cdec0 2530 if (fd >= 0)
b34454d0
EZ		 2531 {
2532 struct _utimbuf _ut;
2533
2534 _ut.actime = timespec[0].tv_sec;
2535 _ut.modtime = timespec[1].tv_sec;
2536 return _futime (fd, &_ut);
2537 }
388cdec0 2538 else
b34454d0
EZ		 2539 {
2540 struct utimbuf ut;
2541
2542 ut.actime = timespec[0].tv_sec;
2543 ut.modtime = timespec[1].tv_sec;
2544 /* Call 'utime', which is implemented below, not the MS library
2545 function, which fails on directories. */
2546 return utime (file, &ut);
2547 }
388cdec0
EZ		 2548}
2549
2550
480b0c5b 2551/* ------------------------------------------------------------------------- */
b46a6a83 2552/* IO support and wrapper functions for the Windows API. */
480b0c5b 2553/* ------------------------------------------------------------------------- */
95ed0025 2554
480b0c5b 2555/* Place a wrapper around the MSVC version of ctime. It returns NULL
177c0ea7 2556 on network directories, so we handle that case here.
480b0c5b
GV		 2557 (Ulrich Leodolter, 1/11/95). */
2558char *
2559sys_ctime (const time_t *t)
2560{
2561 char *str = (char *) ctime (t);
2562 return (str ? str : "Sun Jan 01 00:00:00 1970");
2563}
2564
2565/* Emulate sleep...we could have done this with a define, but that
2566 would necessitate including windows.h in the files that used it.
2567 This is much easier. */
2568void
2569sys_sleep (int seconds)
2570{
2571 Sleep (seconds * 1000);
2572}
2573
76b3903d 2574/* Internal MSVC functions for low-level descriptor munging */
480b0c5b
GV		 2575extern int __cdecl _set_osfhnd (int fd, long h);
2576extern int __cdecl _free_osfhnd (int fd);
2577
2578/* parallel array of private info on file handles */
2579filedesc fd_info [ MAXDESC ];
2580
76b3903d
GV		 2581typedef struct volume_info_data {
2582 struct volume_info_data * next;
2583
2584 /* time when info was obtained */
2585 DWORD timestamp;
2586
2587 /* actual volume info */
2588 char * root_dir;
480b0c5b
GV		 2589 DWORD serialnum;
2590 DWORD maxcomp;
2591 DWORD flags;
76b3903d
GV		 2592 char * name;
2593 char * type;
2594} volume_info_data;
2595
2596/* Global referenced by various functions. */
2597static volume_info_data volume_info;
2598
2599/* Vector to indicate which drives are local and fixed (for which cached
2600 data never expires). */
2601static BOOL fixed_drives[26];
2602
2603/* Consider cached volume information to be stale if older than 10s,
2604 at least for non-local drives. Info for fixed drives is never stale. */
2605#define DRIVE_INDEX( c ) ( (c) <= 'Z' ? (c) - 'A' : (c) - 'a' )
2606#define VOLINFO_STILL_VALID( root_dir, info ) \
2607 ( ( isalpha (root_dir[0]) && \
2608 fixed_drives[ DRIVE_INDEX (root_dir[0]) ] ) \
2609 || GetTickCount () - info->timestamp < 10000 )
2610
2611/* Cache support functions. */
2612
2613/* Simple linked list with linear search is sufficient. */
2614static volume_info_data *volume_cache = NULL;
2615
2616static volume_info_data *
2617lookup_volume_info (char * root_dir)
2618{
2619 volume_info_data * info;
2620
2621 for (info = volume_cache; info; info = info->next)
05131107 2622 if (xstrcasecmp (info->root_dir, root_dir) == 0)
76b3903d
GV		 2623 break;
2624 return info;
2625}
2626
2627static void
2628add_volume_info (char * root_dir, volume_info_data * info)
2629{
a302c7ae 2630 info->root_dir = xstrdup (root_dir);
f5441ba4 2631 unixtodos_filename (info->root_dir);
76b3903d
GV		 2632 info->next = volume_cache;
2633 volume_cache = info;
2634}
2635
2636
2637/* Wrapper for GetVolumeInformation, which uses caching to avoid
2638 performance penalty (~2ms on 486 for local drives, 7.5ms for local
2639 cdrom drive, ~5-10ms or more for remote drives on LAN). */
bedf4aab 2640static volume_info_data *
76b3903d
GV		 2641GetCachedVolumeInformation (char * root_dir)
2642{
2643 volume_info_data * info;
f5441ba4
EZ		 2644 char default_root[ MAX_UTF8_PATH ];
2645 char name[MAX_PATH+1];
2646 char type[MAX_PATH+1];
76b3903d
GV		 2647
2648 /* NULL for root_dir means use root from current directory. */
2649 if (root_dir == NULL)
2650 {
f5441ba4
EZ		 2651 if (w32_unicode_filenames)
2652 {
2653 wchar_t curdirw[MAX_PATH];
2654
2655 if (GetCurrentDirectoryW (MAX_PATH, curdirw) == 0)
2656 return NULL;
2657 filename_from_utf16 (curdirw, default_root);
2658 }
2659 else
2660 {
2661 char curdira[MAX_PATH];
2662
2663 if (GetCurrentDirectoryA (MAX_PATH, curdira) == 0)
2664 return NULL;
2665 filename_from_ansi (curdira, default_root);
2666 }
2667 parse_root (default_root, (const char **)&root_dir);
76b3903d
GV		 2668 *root_dir = 0;
2669 root_dir = default_root;
2670 }
2671
2672 /* Local fixed drives can be cached permanently. Removable drives
2673 cannot be cached permanently, since the volume name and serial
2674 number (if nothing else) can change. Remote drives should be
2675 treated as if they are removable, since there is no sure way to
2676 tell whether they are or not. Also, the UNC association of drive
2677 letters mapped to remote volumes can be changed at any time (even
2678 by other processes) without notice.
177c0ea7 2679
76b3903d
GV		 2680 As a compromise, so we can benefit from caching info for remote
2681 volumes, we use a simple expiry mechanism to invalidate cache
2682 entries that are more than ten seconds old. */
2683
2684#if 0
2685 /* No point doing this, because WNetGetConnection is even slower than
2686 GetVolumeInformation, consistently taking ~50ms on a 486 (FWIW,
2687 GetDriveType is about the only call of this type which does not
2688 involve network access, and so is extremely quick). */
2689
2690 /* Map drive letter to UNC if remote. */
ed3751c8 2691 if (isalpha (root_dir[0]) && !fixed[DRIVE_INDEX (root_dir[0])])
76b3903d
GV		 2692 {
2693 char remote_name[ 256 ];
2694 char drive[3] = { root_dir[0], ':' };
2695
2696 if (WNetGetConnection (drive, remote_name, sizeof (remote_name))
2697 == NO_ERROR)
2698 /* do something */ ;
2699 }
2700#endif
2701
2702 info = lookup_volume_info (root_dir);
2703
2704 if (info == NULL || ! VOLINFO_STILL_VALID (root_dir, info))
94eab1c8 2705 {
94eab1c8
JB		 2706 DWORD serialnum;
2707 DWORD maxcomp;
2708 DWORD flags;
94eab1c8
JB		 2709
2710 /* Info is not cached, or is stale. */
f5441ba4
EZ		 2711 if (w32_unicode_filenames)
2712 {
2713 wchar_t root_w[MAX_PATH];
2714 wchar_t name_w[MAX_PATH+1];
2715 wchar_t type_w[MAX_PATH+1];
2716
2717 filename_to_utf16 (root_dir, root_w);
2718 if (!GetVolumeInformationW (root_w,
2719 name_w, sizeof (name_w),
2720 &serialnum,
2721 &maxcomp,
2722 &flags,
2723 type_w, sizeof (type_w)))
2724 return NULL;
2725 /* Hmm... not really 100% correct, as these 2 are not file
2726 names... */
2727 filename_from_utf16 (name_w, name);
2728 filename_from_utf16 (type_w, type);
2729 }
2730 else
2731 {
2732 char root_a[MAX_PATH];
2733 char name_a[MAX_PATH+1];
2734 char type_a[MAX_PATH+1];
2735
2736 filename_to_ansi (root_dir, root_a);
2737 if (!GetVolumeInformationA (root_a,
2738 name_a, sizeof (name_a),
2739 &serialnum,
2740 &maxcomp,
2741 &flags,
2742 type_a, sizeof (type_a)))
2743 return NULL;
2744 filename_from_ansi (name_a, name);
2745 filename_from_ansi (type_a, type);
2746 }
76b3903d 2747
94eab1c8
JB		 2748 /* Cache the volume information for future use, overwriting existing
2749 entry if present. */
2750 if (info == NULL)
2751 {
23f86fce 2752 info = xmalloc (sizeof (volume_info_data));
94eab1c8
JB		 2753 add_volume_info (root_dir, info);
2754 }
2755 else
2756 {
2757 xfree (info->name);
2758 xfree (info->type);
2759 }
2760
2761 info->name = xstrdup (name);
f5441ba4 2762 unixtodos_filename (info->name);
94eab1c8
JB		 2763 info->serialnum = serialnum;
2764 info->maxcomp = maxcomp;
2765 info->flags = flags;
2766 info->type = xstrdup (type);
2767 info->timestamp = GetTickCount ();
2768 }
76b3903d
GV		 2769
2770 return info;
2771}
480b0c5b 2772
6dad7178
EZ		 2773/* Get information on the volume where NAME is held; set path pointer to
2774 start of pathname in NAME (past UNC header\volume header if present),
2775 if pPath is non-NULL.
2776
2777 Note: if NAME includes symlinks, the information is for the volume
2778 of the symlink, not of its target. That's because, even though
2779 GetVolumeInformation returns information about the symlink target
2780 of its argument, we only pass the root directory to
2781 GetVolumeInformation, not the full NAME. */
bedf4aab 2782static int
480b0c5b 2783get_volume_info (const char * name, const char ** pPath)
95ed0025 2784{
f5441ba4 2785 char temp[MAX_UTF8_PATH];
480b0c5b 2786 char *rootname = NULL; /* default to current volume */
76b3903d 2787 volume_info_data * info;
f5441ba4 2788 int root_len = parse_root (name, pPath);
480b0c5b
GV		 2789
2790 if (name == NULL)
2791 return FALSE;
2792
f5441ba4
EZ		 2793 /* Copy the root name of the volume, if given. */
2794 if (root_len)
95ed0025 2795 {
f5441ba4
EZ		 2796 strncpy (temp, name, root_len);
2797 temp[root_len] = '\0';
2798 unixtodos_filename (temp);
480b0c5b 2799 rootname = temp;
95ed0025 2800 }
480b0c5b 2801
76b3903d
GV		 2802 info = GetCachedVolumeInformation (rootname);
2803 if (info != NULL)
95ed0025 2804 {
76b3903d
GV		 2805 /* Set global referenced by other functions. */
2806 volume_info = *info;
480b0c5b 2807 return TRUE;
95ed0025 2808 }
480b0c5b
GV		 2809 return FALSE;
2810}
2811
2812/* Determine if volume is FAT format (ie. only supports short 8.3
6dad7178
EZ		 2813 names); also set path pointer to start of pathname in name, if
2814 pPath is non-NULL. */
bedf4aab 2815static int
480b0c5b
GV		 2816is_fat_volume (const char * name, const char ** pPath)
2817{
2818 if (get_volume_info (name, pPath))
2819 return (volume_info.maxcomp == 12);
2820 return FALSE;
2821}
2822
f5441ba4
EZ		 2823/* Convert all slashes in a filename to backslashes, and map filename
2824 to a valid 8.3 name if necessary. The result is a pointer to a
2825 static buffer, so CAVEAT EMPTOR! */
480b0c5b 2826const char *
fbd6baed 2827map_w32_filename (const char * name, const char ** pPath)
480b0c5b 2828{
f5441ba4 2829 static char shortname[MAX_UTF8_PATH];
480b0c5b
GV		 2830 char * str = shortname;
2831 char c;
480b0c5b 2832 char * path;
76b3903d 2833 const char * save_name = name;
480b0c5b 2834
f5441ba4 2835 if (strlen (name) >= sizeof (shortname))
ca149beb
AI		 2836 {
2837 /* Return a filename which will cause callers to fail. */
2838 strcpy (shortname, "?");
2839 return shortname;
2840 }
2841
a302c7ae 2842 if (is_fat_volume (name, (const char **)&path)) /* truncate to 8.3 */
95ed0025 2843 {
480b0c5b
GV		 2844 register int left = 8; /* maximum number of chars in part */
2845 register int extn = 0; /* extension added? */
2846 register int dots = 2; /* maximum number of dots allowed */
2847
2848 while (name < path)
2849 *str++ = *name++; /* skip past UNC header */
2850
2851 while ((c = *name++))
2852 {
2853 switch ( c )
2854 {
6dad7178 2855 case ':':
480b0c5b
GV		 2856 case '\\':
2857 case '/':
6dad7178 2858 *str++ = (c == ':' ? ':' : '\\');
480b0c5b
GV		 2859 extn = 0; /* reset extension flags */
2860 dots = 2; /* max 2 dots */
2861 left = 8; /* max length 8 for main part */
2862 break;
2863 case '.':
2864 if ( dots )
2865 {
2866 /* Convert path components of the form .xxx to _xxx,
2867 but leave . and .. as they are. This allows .emacs
2868 to be read as _emacs, for example. */
2869
2870 if (! *name ||
2871 *name == '.' ||
2872 IS_DIRECTORY_SEP (*name))
2873 {
2874 *str++ = '.';
2875 dots--;
2876 }
2877 else
2878 {
2879 *str++ = '_';
2880 left--;
2881 dots = 0;
2882 }
2883 }
2884 else if ( !extn )
2885 {
2886 *str++ = '.';
2887 extn = 1; /* we've got an extension */
2888 left = 3; /* 3 chars in extension */
2889 }
2890 else
2891 {
2892 /* any embedded dots after the first are converted to _ */
2893 *str++ = '_';
2894 }
2895 break;
2896 case '~':
2897 case '#': /* don't lose these, they're important */
2898 if ( ! left )
2899 str[-1] = c; /* replace last character of part */
2900 /* FALLTHRU */
2901 default:
f5441ba4 2902 if ( left && 'A' <= c && c <= 'Z' )
480b0c5b
GV		 2903 {
2904 *str++ = tolower (c); /* map to lower case (looks nicer) */
2905 left--;
2906 dots = 0; /* started a path component */
2907 }
2908 break;
2909 }
2910 }
2911 *str = '\0';
fc85cb29
RS		 2912 }
2913 else
2914 {
2915 strcpy (shortname, name);
2916 unixtodos_filename (shortname);
95ed0025 2917 }
480b0c5b
GV		 2918
2919 if (pPath)
76b3903d 2920 *pPath = shortname + (path - save_name);
480b0c5b 2921
fc85cb29 2922 return shortname;
480b0c5b
GV		 2923}
2924
b3308d2e
KH		 2925static int
2926is_exec (const char * name)
2927{
2928 char * p = strrchr (name, '.');
2929 return
2930 (p != NULL
05131107
JR		 2931 && (xstrcasecmp (p, ".exe") == 0 ||
2932 xstrcasecmp (p, ".com") == 0 ||
2933 xstrcasecmp (p, ".bat") == 0 ||
2934 xstrcasecmp (p, ".cmd") == 0));
b3308d2e
KH		 2935}
2936
0b9de7cd
EZ		 2937/* Emulate the Unix directory procedures opendir, closedir, and
2938 readdir. We rename them to sys_* names because some versions of
2939 MinGW startup code call opendir and readdir to glob wildcards, and
2940 the code that calls them doesn't grok UTF-8 encoded file names we
2941 produce in dirent->d_name[]. */
76b3903d 2942
95ef7787 2943struct dirent dir_static; /* simulated directory contents */
76b3903d
GV		 2944static HANDLE dir_find_handle = INVALID_HANDLE_VALUE;
2945static int dir_is_fat;
0b9de7cd
EZ		 2946static char dir_pathname[MAX_UTF8_PATH];
2947static WIN32_FIND_DATAW dir_find_data_w;
2948static WIN32_FIND_DATAA dir_find_data_a;
76b3903d 2949
9d3355d1
GV		 2950/* Support shares on a network resource as subdirectories of a read-only
2951 root directory. */
2952static HANDLE wnet_enum_handle = INVALID_HANDLE_VALUE;
bedf4aab 2953static HANDLE open_unc_volume (const char *);
0b9de7cd 2954static void *read_unc_volume (HANDLE, wchar_t *, char *, int);
bedf4aab 2955static void close_unc_volume (HANDLE);
9d3355d1 2956
76b3903d 2957DIR *
0b9de7cd 2958sys_opendir (const char *filename)
76b3903d
GV		 2959{
2960 DIR *dirp;
2961
2962 /* Opening is done by FindFirstFile. However, a read is inherent to
2963 this operation, so we defer the open until read time. */
2964
76b3903d
GV		 2965 if (dir_find_handle != INVALID_HANDLE_VALUE)
2966 return NULL;
9d3355d1
GV		 2967 if (wnet_enum_handle != INVALID_HANDLE_VALUE)
2968 return NULL;
2969
6dad7178
EZ		 2970 /* Note: We don't support traversal of UNC volumes via symlinks.
2971 Doing so would mean punishing 99.99% of use cases by resolving
2972 all the possible symlinks in FILENAME, recursively. */
9d3355d1
GV		 2973 if (is_unc_volume (filename))
2974 {
2975 wnet_enum_handle = open_unc_volume (filename);
2976 if (wnet_enum_handle == INVALID_HANDLE_VALUE)
2977 return NULL;
2978 }
2979
2980 if (!(dirp = (DIR *) malloc (sizeof (DIR))))
2981 return NULL;
76b3903d
GV		 2982
2983 dirp->dd_fd = 0;
2984 dirp->dd_loc = 0;
2985 dirp->dd_size = 0;
2986
0b9de7cd
EZ		 2987 strncpy (dir_pathname, map_w32_filename (filename, NULL), MAX_UTF8_PATH - 1);
2988 dir_pathname[MAX_UTF8_PATH - 1] = '\0';
6dad7178
EZ		 2989 /* Note: We don't support symlinks to file names on FAT volumes.
2990 Doing so would mean punishing 99.99% of use cases by resolving
2991 all the possible symlinks in FILENAME, recursively. */
76b3903d
GV		 2992 dir_is_fat = is_fat_volume (filename, NULL);
2993
2994 return dirp;
2995}
2996
2997void
0b9de7cd 2998sys_closedir (DIR *dirp)
76b3903d
GV		 2999{
3000 /* If we have a find-handle open, close it. */
3001 if (dir_find_handle != INVALID_HANDLE_VALUE)
3002 {
3003 FindClose (dir_find_handle);
3004 dir_find_handle = INVALID_HANDLE_VALUE;
3005 }
9d3355d1
GV		 3006 else if (wnet_enum_handle != INVALID_HANDLE_VALUE)
3007 {
3008 close_unc_volume (wnet_enum_handle);
3009 wnet_enum_handle = INVALID_HANDLE_VALUE;
3010 }
76b3903d
GV		 3011 xfree ((char *) dirp);
3012}
3013
95ef7787 3014struct dirent *
0b9de7cd 3015sys_readdir (DIR *dirp)
76b3903d 3016{
b07103dc
EZ		 3017 int downcase = !NILP (Vw32_downcase_file_names);
3018
9d3355d1
GV		 3019 if (wnet_enum_handle != INVALID_HANDLE_VALUE)
3020 {
177c0ea7 3021 if (!read_unc_volume (wnet_enum_handle,
0b9de7cd
EZ		 3022 dir_find_data_w.cFileName,
3023 dir_find_data_a.cFileName,
59eb0929 3024 MAX_PATH))
9d3355d1
GV		 3025 return NULL;
3026 }
76b3903d 3027 /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */
9d3355d1 3028 else if (dir_find_handle == INVALID_HANDLE_VALUE)
76b3903d 3029 {
0b9de7cd 3030 char filename[MAX_UTF8_PATH + 2];
76b3903d
GV		 3031 int ln;
3032
3033 strcpy (filename, dir_pathname);
3034 ln = strlen (filename) - 1;
0b9de7cd
EZ		 3035 if (!IS_DIRECTORY_SEP (filename[ln]))
3036 strcat (filename, "\\");
3037 strcat (filename, "*");
3038
3039 /* Note: No need to resolve symlinks in FILENAME, because
3040 FindFirst opens the directory that is the target of a
3041 symlink. */
3042 if (w32_unicode_filenames)
806fed21 3043 {
0b9de7cd
EZ		 3044 wchar_t fnw[MAX_PATH];
3045
3046 filename_to_utf16 (filename, fnw);
3047 dir_find_handle = FindFirstFileW (fnw, &dir_find_data_w);
806fed21
EZ		 3048 }
3049 else
3050 {
0b9de7cd 3051 char fna[MAX_PATH];
806fed21 3052
0b9de7cd
EZ		 3053 filename_to_ansi (filename, fna);
3054 dir_find_handle = FindFirstFileA (fna, &dir_find_data_a);
806fed21 3055 }
76b3903d
GV		 3056
3057 if (dir_find_handle == INVALID_HANDLE_VALUE)
3058 return NULL;
3059 }
0b9de7cd
EZ		 3060 else if (w32_unicode_filenames)
3061 {
3062 if (!FindNextFileW (dir_find_handle, &dir_find_data_w))
3063 return NULL;
3064 }
76b3903d
GV		 3065 else
3066 {
0b9de7cd 3067 if (!FindNextFileA (dir_find_handle, &dir_find_data_a))
76b3903d
GV		 3068 return NULL;
3069 }
177c0ea7 3070
76b3903d
GV		 3071 /* Emacs never uses this value, so don't bother making it match
3072 value returned by stat(). */
3073 dir_static.d_ino = 1;
177c0ea7 3074
0b9de7cd 3075 if (w32_unicode_filenames)
b07103dc 3076 {
0b9de7cd
EZ		 3077 if (downcase || dir_is_fat)
3078 {
3079 wchar_t tem[MAX_PATH];
177c0ea7 3080
0b9de7cd
EZ		 3081 wcscpy (tem, dir_find_data_w.cFileName);
3082 CharLowerW (tem);
3083 filename_from_utf16 (tem, dir_static.d_name);
3084 }
3085 else
3086 filename_from_utf16 (dir_find_data_w.cFileName, dir_static.d_name);
192788d7
EZ		 3087 }
3088 else
76b3903d 3089 {
0b9de7cd
EZ		 3090 char tem[MAX_PATH];
3091
3092 /* If the file name in cFileName[] includes `?' characters, it
3093 means the original file name used characters that cannot be
3094 represented by the current ANSI codepage. To avoid total
3095 lossage, retrieve the short 8+3 alias of the long file
3096 name. */
3097 if (_mbspbrk (dir_find_data_a.cFileName, "?"))
6d2851de 3098 {
0b9de7cd
EZ		 3099 strcpy (tem, dir_find_data_a.cAlternateFileName);
3100 /* 8+3 aliases are returned in all caps, which could break
3101 various alists that look at filenames' extensions. */
3102 downcase = 1;
3103 }
3104 else if (downcase || dir_is_fat)
3105 strcpy (tem, dir_find_data_a.cFileName);
3106 else
3107 filename_from_ansi (dir_find_data_a.cFileName, dir_static.d_name);
3108 if (downcase || dir_is_fat)
3109 {
3110 _mbslwr (tem);
3111 filename_from_ansi (tem, dir_static.d_name);
6d2851de 3112 }
76b3903d 3113 }
177c0ea7 3114
0b9de7cd
EZ		 3115 dir_static.d_namlen = strlen (dir_static.d_name);
3116 dir_static.d_reclen = sizeof (struct dirent) - MAX_UTF8_PATH + 3 +
3117 dir_static.d_namlen - dir_static.d_namlen % 4;
3118
76b3903d
GV		 3119 return &dir_static;
3120}
3121
bedf4aab 3122static HANDLE
e0c181dd 3123open_unc_volume (const char *path)
9d3355d1 3124{
0b9de7cd
EZ		 3125 const char *fn = map_w32_filename (path, NULL);
3126 DWORD result;
9d3355d1 3127 HANDLE henum;
9d3355d1 3128
0b9de7cd
EZ		 3129 if (w32_unicode_filenames)
3130 {
3131 NETRESOURCEW nrw;
3132 wchar_t fnw[MAX_PATH];
3133
3134 nrw.dwScope = RESOURCE_GLOBALNET;
3135 nrw.dwType = RESOURCETYPE_DISK;
3136 nrw.dwDisplayType = RESOURCEDISPLAYTYPE_SERVER;
3137 nrw.dwUsage = RESOURCEUSAGE_CONTAINER;
3138 nrw.lpLocalName = NULL;
3139 filename_to_utf16 (fn, fnw);
3140 nrw.lpRemoteName = fnw;
3141 nrw.lpComment = NULL;
3142 nrw.lpProvider = NULL;
9d3355d1 3143
0b9de7cd
EZ		 3144 result = WNetOpenEnumW (RESOURCE_GLOBALNET, RESOURCETYPE_DISK,
3145 RESOURCEUSAGE_CONNECTABLE, &nrw, &henum);
3146 }
3147 else
3148 {
3149 NETRESOURCEA nra;
3150 char fna[MAX_PATH];
9d3355d1 3151
0b9de7cd
EZ		 3152 nra.dwScope = RESOURCE_GLOBALNET;
3153 nra.dwType = RESOURCETYPE_DISK;
3154 nra.dwDisplayType = RESOURCEDISPLAYTYPE_SERVER;
3155 nra.dwUsage = RESOURCEUSAGE_CONTAINER;
3156 nra.lpLocalName = NULL;
3157 filename_to_ansi (fn, fna);
3158 nra.lpRemoteName = fna;
3159 nra.lpComment = NULL;
3160 nra.lpProvider = NULL;
3161
3162 result = WNetOpenEnumA (RESOURCE_GLOBALNET, RESOURCETYPE_DISK,
3163 RESOURCEUSAGE_CONNECTABLE, &nra, &henum);
3164 }
9d3355d1
GV		 3165 if (result == NO_ERROR)
3166 return henum;
3167 else
3168 return INVALID_HANDLE_VALUE;
3169}
3170
0b9de7cd
EZ		 3171static void *
3172read_unc_volume (HANDLE henum, wchar_t *fname_w, char *fname_a, int size)
9d3355d1 3173{
a302c7ae 3174 DWORD count;
9d3355d1 3175 int result;
9d3355d1 3176 char *buffer;
0b9de7cd
EZ		 3177 DWORD bufsize = 512;
3178 void *retval;
9d3355d1
GV		 3179
3180 count = 1;
0b9de7cd
EZ		 3181 if (w32_unicode_filenames)
3182 {
3183 wchar_t *ptrw;
9d3355d1 3184
0b9de7cd
EZ		 3185 bufsize *= 2;
3186 buffer = alloca (bufsize);
3187 result = WNetEnumResourceW (henum, &count, buffer, &bufsize);
3188 if (result != NO_ERROR)
3189 return NULL;
3190 /* WNetEnumResource returns \\resource\share...skip forward to "share". */
3191 ptrw = ((LPNETRESOURCEW) buffer)->lpRemoteName;
3192 ptrw += 2;
3193 while (*ptrw && *ptrw != L'/' && *ptrw != L'\\') ptrw++;
3194 ptrw++;
3195 wcsncpy (fname_w, ptrw, size);
3196 retval = fname_w;
3197 }
806fed21
EZ		 3198 else
3199 {
0b9de7cd
EZ		 3200 int dbcs_p = max_filename_mbslen () > 1;
3201 char *ptra;
3202
3203 buffer = alloca (bufsize);
3204 result = WNetEnumResourceA (henum, &count, buffer, &bufsize);
3205 if (result != NO_ERROR)
3206 return NULL;
3207 ptra = ((LPNETRESOURCEA) buffer)->lpRemoteName;
3208 ptra += 2;
3209 if (!dbcs_p)
3210 while (*ptra && !IS_DIRECTORY_SEP (*ptra)) ptra++;
3211 else
3212 {
3213 while (*ptra && !IS_DIRECTORY_SEP (*ptra))
3214 ptra = CharNextExA (file_name_codepage, ptra, 0);
3215 }
3216 ptra++;
3217 strncpy (fname_a, ptra, size);
3218 retval = fname_a;
806fed21 3219 }
9d3355d1 3220
0b9de7cd 3221 return retval;
9d3355d1
GV		 3222}
3223
bedf4aab 3224static void
9d3355d1
GV		 3225close_unc_volume (HANDLE henum)
3226{
3227 if (henum != INVALID_HANDLE_VALUE)
3228 WNetCloseEnum (henum);
3229}
3230
bedf4aab 3231static DWORD
e0c181dd 3232unc_volume_file_attributes (const char *path)
9d3355d1
GV		 3233{
3234 HANDLE henum;
3235 DWORD attrs;
3236
3237 henum = open_unc_volume (path);
3238 if (henum == INVALID_HANDLE_VALUE)
3239 return -1;
3240
3241 attrs = FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_DIRECTORY;
3242
3243 close_unc_volume (henum);
3244
3245 return attrs;
3246}
3247
302d7d54
JR		 3248/* Ensure a network connection is authenticated. */
3249static void
3250logon_network_drive (const char *path)
3251{
0b9de7cd 3252 char share[MAX_UTF8_PATH];
806fed21 3253 int n_slashes;
40a339c8 3254 char drive[4];
be4c6380 3255 UINT drvtype;
806fed21 3256 char *p;
0b9de7cd 3257 DWORD val;
40a339c8 3258
be4c6380
EZ		 3259 if (IS_DIRECTORY_SEP (path[0]) && IS_DIRECTORY_SEP (path[1]))
3260 drvtype = DRIVE_REMOTE;
3261 else if (path[0] == '\0' || path[1] != ':')
3262 drvtype = GetDriveType (NULL);
3263 else
3264 {
3265 drive[0] = path[0];
3266 drive[1] = ':';
3267 drive[2] = '\\';
3268 drive[3] = '\0';
3269 drvtype = GetDriveType (drive);
3270 }
302d7d54
JR		 3271
3272 /* Only logon to networked drives. */
be4c6380 3273 if (drvtype != DRIVE_REMOTE)
302d7d54 3274 return;
40a339c8 3275
302d7d54 3276 n_slashes = 2;
0b9de7cd 3277 strncpy (share, path, MAX_UTF8_PATH);
302d7d54 3278 /* Truncate to just server and share name. */
0b9de7cd 3279 for (p = share + 2; *p && p < share + MAX_UTF8_PATH; p++)
302d7d54 3280 {
806fed21 3281 if (IS_DIRECTORY_SEP (*p) && ++n_slashes > 3)
302d7d54 3282 {
806fed21 3283 *p = '\0';
302d7d54
JR		 3284 break;
3285 }
3286 }
3287
0b9de7cd
EZ		 3288 if (w32_unicode_filenames)
3289 {
3290 NETRESOURCEW resourcew;
3291 wchar_t share_w[MAX_PATH];
3292
3293 resourcew.dwScope = RESOURCE_GLOBALNET;
3294 resourcew.dwType = RESOURCETYPE_DISK;
3295 resourcew.dwDisplayType = RESOURCEDISPLAYTYPE_SHARE;
3296 resourcew.dwUsage = RESOURCEUSAGE_CONTAINER;
3297 resourcew.lpLocalName = NULL;
3298 filename_to_utf16 (share, share_w);
3299 resourcew.lpRemoteName = share_w;
3300 resourcew.lpProvider = NULL;
3301
3302 val = WNetAddConnection2W (&resourcew, NULL, NULL, CONNECT_INTERACTIVE);
3303 }
3304 else
3305 {
3306 NETRESOURCEA resourcea;
3307 char share_a[MAX_PATH];
3308
3309 resourcea.dwScope = RESOURCE_GLOBALNET;
3310 resourcea.dwType = RESOURCETYPE_DISK;
3311 resourcea.dwDisplayType = RESOURCEDISPLAYTYPE_SHARE;
3312 resourcea.dwUsage = RESOURCEUSAGE_CONTAINER;
3313 resourcea.lpLocalName = NULL;
3314 filename_to_ansi (share, share_a);
3315 resourcea.lpRemoteName = share_a;
3316 resourcea.lpProvider = NULL;
302d7d54 3317
0b9de7cd
EZ		 3318 val = WNetAddConnection2A (&resourcea, NULL, NULL, CONNECT_INTERACTIVE);
3319 }
3320
3321 switch (val)
3322 {
3323 case NO_ERROR:
3324 case ERROR_ALREADY_ASSIGNED:
3325 break;
3326 case ERROR_ACCESS_DENIED:
3327 case ERROR_LOGON_FAILURE:
3328 errno = EACCES;
3329 break;
3330 case ERROR_BUSY:
3331 errno = EAGAIN;
3332 break;
3333 case ERROR_BAD_NET_NAME:
3334 case ERROR_NO_NET_OR_BAD_PATH:
3335 case ERROR_NO_NETWORK:
3336 case ERROR_CANCELLED:
3337 default:
3338 errno = ENOENT;
3339 break;
3340 }
302d7d54 3341}
480b0c5b 3342
14f20728 3343/* Emulate faccessat(2). */
480b0c5b 3344int
14f20728 3345faccessat (int dirfd, const char * path, int mode, int flags)
480b0c5b 3346{
b3308d2e
KH		 3347 DWORD attributes;
3348
14f20728
EZ		 3349 if (dirfd != AT_FDCWD
3350 && !(IS_DIRECTORY_SEP (path[0])
3351 || IS_DEVICE_SEP (path[1])))
73dcdb9f
PE		 3352 {
3353 errno = EBADF;
3354 return -1;
3355 }
3356
8d38f461
EZ		 3357 /* MSVCRT implementation of 'access' doesn't recognize D_OK, and its
3358 newer versions blow up when passed D_OK. */
b3308d2e 3359 path = map_w32_filename (path, NULL);
6dad7178
EZ		 3360 /* If the last element of PATH is a symlink, we need to resolve it
3361 to get the attributes of its target file. Note: any symlinks in
3362 PATH elements other than the last one are transparently resolved
3363 by GetFileAttributes below. */
14f20728
EZ		 3364 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0
3365 && (flags & AT_SYMLINK_NOFOLLOW) == 0)
6dad7178
EZ		 3366 path = chase_symlinks (path);
3367
e75e4a89
EZ		 3368 if (w32_unicode_filenames)
3369 {
3370 wchar_t path_w[MAX_PATH];
3371
3372 filename_to_utf16 (path, path_w);
3373 attributes = GetFileAttributesW (path_w);
3374 }
3375 else
3376 {
3377 char path_a[MAX_PATH];
3378
3379 filename_to_ansi (path, path_a);
3380 attributes = GetFileAttributesA (path_a);
3381 }
3382
3383 if (attributes == -1)
b3308d2e 3384 {
8d38f461
EZ		 3385 DWORD w32err = GetLastError ();
3386
3387 switch (w32err)
3388 {
6dad7178
EZ		 3389 case ERROR_INVALID_NAME:
3390 case ERROR_BAD_PATHNAME:
3391 if (is_unc_volume (path))
3392 {
3393 attributes = unc_volume_file_attributes (path);
3394 if (attributes == -1)
3395 {
3396 errno = EACCES;
3397 return -1;
3398 }
3399 break;
3400 }
3401 /* FALLTHROUGH */
8d38f461 3402 case ERROR_FILE_NOT_FOUND:
6dad7178 3403 case ERROR_BAD_NETPATH:
8d38f461
EZ		 3404 errno = ENOENT;
3405 break;
3406 default:
3407 errno = EACCES;
3408 break;
3409 }
b3308d2e
KH		 3410 return -1;
3411 }
6ad30855
EZ		 3412 if ((mode & X_OK) != 0
3413 && !(is_exec (path) || (attributes & FILE_ATTRIBUTE_DIRECTORY) != 0))
b3308d2e
KH		 3414 {
3415 errno = EACCES;
3416 return -1;
3417 }
3418 if ((mode & W_OK) != 0 && (attributes & FILE_ATTRIBUTE_READONLY) != 0)
3419 {
3420 errno = EACCES;
3421 return -1;
3422 }
3423 if ((mode & D_OK) != 0 && (attributes & FILE_ATTRIBUTE_DIRECTORY) == 0)
3424 {
3425 errno = EACCES;
3426 return -1;
3427 }
3428 return 0;
480b0c5b
GV		 3429}
3430
b1846422
EZ		 3431/* A version of 'access' to be used locally with file names in
3432 locale-specific encoding. Does not resolve symlinks and does not
3433 support file names on FAT12 and FAT16 volumes, but that's OK, since
3434 we only invoke this function for files inside the Emacs source or
3435 installation tree, on directories (so any symlinks should have the
3436 directory bit set), and on short file names such as "C:/.emacs". */
3437static int
3438sys_access (const char *fname, int mode)
3439{
3440 char fname_copy[MAX_PATH], *p;
3441 DWORD attributes;
3442
3443 strcpy (fname_copy, fname);
3444 /* Do the equivalent of unixtodos_filename. */
3445 for (p = fname_copy; *p; p = CharNext (p))
3446 if (*p == '/')
3447 *p = '\\';
3448
3449 if ((attributes = GetFileAttributesA (fname_copy)) == -1)
3450 {
3451 DWORD w32err = GetLastError ();
3452
3453 switch (w32err)
3454 {
3455 case ERROR_INVALID_NAME:
3456 case ERROR_BAD_PATHNAME:
3457 case ERROR_FILE_NOT_FOUND:
3458 case ERROR_BAD_NETPATH:
3459 errno = ENOENT;
3460 break;
3461 default:
3462 errno = EACCES;
3463 break;
3464 }
3465 return -1;
3466 }
3467 if ((mode & X_OK) != 0
3468 && !(is_exec (fname_copy)
3469 || (attributes & FILE_ATTRIBUTE_DIRECTORY) != 0))
3470 {
3471 errno = EACCES;
3472 return -1;
3473 }
3474 if ((mode & W_OK) != 0 && (attributes & FILE_ATTRIBUTE_READONLY) != 0)
3475 {
3476 errno = EACCES;
3477 return -1;
3478 }
3479 if ((mode & D_OK) != 0 && (attributes & FILE_ATTRIBUTE_DIRECTORY) == 0)
3480 {
3481 errno = EACCES;
3482 return -1;
3483 }
3484 return 0;
3485}
3486
14f20728
EZ		 3487/* Shadow some MSVC runtime functions to map requests for long filenames
3488 to reasonable short names if necessary. This was originally added to
3489 permit running Emacs on NT 3.1 on a FAT partition, which doesn't support
3490 long file names. */
3491
480b0c5b
GV		 3492int
3493sys_chdir (const char * path)
3494{
e75e4a89 3495 path = map_w32_filename (path, NULL);
03d58cca
EZ		 3496 if (w32_unicode_filenames)
3497 {
e75e4a89 3498 wchar_t newdir_w[MAX_PATH];
03d58cca 3499
e75e4a89
EZ		 3500 if (filename_to_utf16 (path, newdir_w) == 0)
3501 return _wchdir (newdir_w);
03d58cca
EZ		 3502 return -1;
3503 }
3504 else
3505 {
e75e4a89 3506 char newdir_a[MAX_PATH];
03d58cca 3507
e75e4a89
EZ		 3508 if (filename_to_ansi (path, newdir_a) == 0)
3509 return _chdir (newdir_a);
03d58cca
EZ		 3510 return -1;
3511 }
480b0c5b
GV		 3512}
3513
3514int
3515sys_chmod (const char * path, int mode)
3516{
6dad7178 3517 path = chase_symlinks (map_w32_filename (path, NULL));
e75e4a89
EZ		 3518 if (w32_unicode_filenames)
3519 {
3520 wchar_t path_w[MAX_PATH];
3521
3522 filename_to_utf16 (path, path_w);
3523 return _wchmod (path_w, mode);
3524 }
3525 else
3526 {
3527 char path_a[MAX_PATH];
3528
3529 filename_to_ansi (path, path_a);
3530 return _chmod (path_a, mode);
3531 }
480b0c5b
GV		 3532}
3533
3534int
3535sys_creat (const char * path, int mode)
3536{
e75e4a89
EZ		 3537 path = map_w32_filename (path, NULL);
3538 if (w32_unicode_filenames)
3539 {
3540 wchar_t path_w[MAX_PATH];
3541
3542 filename_to_utf16 (path, path_w);
3543 return _wcreat (path_w, mode);
3544 }
3545 else
3546 {
3547 char path_a[MAX_PATH];
3548
3549 filename_to_ansi (path, path_a);
3550 return _creat (path_a, mode);
3551 }
480b0c5b
GV		 3552}
3553
3554FILE *
b56ceb92 3555sys_fopen (const char * path, const char * mode)
480b0c5b
GV		 3556{
3557 int fd;
3558 int oflag;
3559 const char * mode_save = mode;
3560
3561 /* Force all file handles to be non-inheritable. This is necessary to
3562 ensure child processes don't unwittingly inherit handles that might
3563 prevent future file access. */
3564
3565 if (mode[0] == 'r')
3566 oflag = O_RDONLY;
3567 else if (mode[0] == 'w' || mode[0] == 'a')
3568 oflag = O_WRONLY | O_CREAT | O_TRUNC;
95ed0025 3569 else
480b0c5b
GV		 3570 return NULL;
3571
3572 /* Only do simplistic option parsing. */
3573 while (*++mode)
3574 if (mode[0] == '+')
3575 {
3576 oflag &= ~(O_RDONLY | O_WRONLY);
3577 oflag |= O_RDWR;
3578 }
3579 else if (mode[0] == 'b')
3580 {
3581 oflag &= ~O_TEXT;
3582 oflag |= O_BINARY;
3583 }
3584 else if (mode[0] == 't')
3585 {
3586 oflag &= ~O_BINARY;
3587 oflag |= O_TEXT;
3588 }
3589 else break;
3590
e75e4a89
EZ		 3591 path = map_w32_filename (path, NULL);
3592 if (w32_unicode_filenames)
3593 {
3594 wchar_t path_w[MAX_PATH];
3595
3596 filename_to_utf16 (path, path_w);
3597 fd = _wopen (path_w, oflag | _O_NOINHERIT, 0644);
3598 }
3599 else
3600 {
3601 char path_a[MAX_PATH];
3602
3603 filename_to_ansi (path, path_a);
3604 fd = _open (path_a, oflag | _O_NOINHERIT, 0644);
3605 }
480b0c5b
GV		 3606 if (fd < 0)
3607 return NULL;
3608
76b3903d 3609 return _fdopen (fd, mode_save);
95ed0025 3610}
480b0c5b 3611
76b3903d 3612/* This only works on NTFS volumes, but is useful to have. */
480b0c5b 3613int
76b3903d 3614sys_link (const char * old, const char * new)
480b0c5b 3615{
76b3903d
GV		 3616 HANDLE fileh;
3617 int result = -1;
6349f70a
EZ		 3618 char oldname[MAX_UTF8_PATH], newname[MAX_UTF8_PATH];
3619 wchar_t oldname_w[MAX_PATH];
3620 char oldname_a[MAX_PATH];
76b3903d
GV		 3621
3622 if (old == NULL || new == NULL)
3623 {
3624 errno = ENOENT;
3625 return -1;
3626 }
3627
3628 strcpy (oldname, map_w32_filename (old, NULL));
3629 strcpy (newname, map_w32_filename (new, NULL));
3630
6349f70a
EZ		 3631 if (w32_unicode_filenames)
3632 {
3633 filename_to_utf16 (oldname, oldname_w);
3634 fileh = CreateFileW (oldname_w, 0, 0, NULL, OPEN_EXISTING,
3635 FILE_FLAG_BACKUP_SEMANTICS, NULL);
3636 }
3637 else
3638 {
3639 filename_to_ansi (oldname, oldname_a);
3640 fileh = CreateFileA (oldname_a, 0, 0, NULL, OPEN_EXISTING,
3641 FILE_FLAG_BACKUP_SEMANTICS, NULL);
3642 }
76b3903d
GV		 3643 if (fileh != INVALID_HANDLE_VALUE)
3644 {
3645 int wlen;
3646
3647 /* Confusingly, the "alternate" stream name field does not apply
3648 when restoring a hard link, and instead contains the actual
3649 stream data for the link (ie. the name of the link to create).
3650 The WIN32_STREAM_ID structure before the cStreamName field is
3651 the stream header, which is then immediately followed by the
3652 stream data. */
3653
3654 struct {
3655 WIN32_STREAM_ID wid;
3656 WCHAR wbuffer[MAX_PATH]; /* extra space for link name */
3657 } data;
3658
6349f70a
EZ		 3659 /* We used to pass MB_PRECOMPOSED as the 2nd arg here, but MSDN
3660 indicates that flag is unsupported for CP_UTF8, and OTOH says
3661 it is the default anyway. */
3662 wlen = MultiByteToWideChar (CP_UTF8, 0, newname, -1,
76b3903d
GV		 3663 data.wid.cStreamName, MAX_PATH);
3664 if (wlen > 0)
3665 {
3666 LPVOID context = NULL;
3667 DWORD wbytes = 0;
3668
3669 data.wid.dwStreamId = BACKUP_LINK;
3670 data.wid.dwStreamAttributes = 0;
ed3751c8 3671 data.wid.Size.LowPart = wlen * sizeof (WCHAR);
76b3903d
GV		 3672 data.wid.Size.HighPart = 0;
3673 data.wid.dwStreamNameSize = 0;
3674
3675 if (BackupWrite (fileh, (LPBYTE)&data,
3676 offsetof (WIN32_STREAM_ID, cStreamName)
3677 + data.wid.Size.LowPart,
3678 &wbytes, FALSE, FALSE, &context)
3679 && BackupWrite (fileh, NULL, 0, &wbytes, TRUE, FALSE, &context))
3680 {
3681 /* succeeded */
3682 result = 0;
3683 }
3684 else
3685 {
6349f70a
EZ		 3686 DWORD err = GetLastError ();
3687 DWORD attributes;
3688
3689 switch (err)
3690 {
3691 case ERROR_ACCESS_DENIED:
3692 /* This is what happens when OLDNAME is a directory,
3693 since Windows doesn't support hard links to
3694 directories. Posix says to set errno to EPERM in
3695 that case. */
3696 if (w32_unicode_filenames)
3697 attributes = GetFileAttributesW (oldname_w);
3698 else
3699 attributes = GetFileAttributesA (oldname_a);
3700 if (attributes != -1
3701 && (attributes & FILE_ATTRIBUTE_DIRECTORY) != 0)
3702 errno = EPERM;
3703 else if (attributes == -1
3704 && is_unc_volume (oldname)
3705 && unc_volume_file_attributes (oldname) != -1)
3706 errno = EPERM;
3707 else
3708 errno = EACCES;
3709 break;
3710 case ERROR_TOO_MANY_LINKS:
3711 errno = EMLINK;
3712 break;
3713 case ERROR_NOT_SAME_DEVICE:
3714 errno = EXDEV;
3715 break;
3716 default:
3717 errno = EINVAL;
3718 break;
3719 }
76b3903d
GV		 3720 }
3721 }
3722
3723 CloseHandle (fileh);
3724 }
3725 else
3726 errno = ENOENT;
3727
3728 return result;
480b0c5b
GV		 3729}
3730
3731int
3732sys_mkdir (const char * path)
3733{
44b32251
EZ		 3734 path = map_w32_filename (path, NULL);
3735
3736 if (w32_unicode_filenames)
3737 {
3738 wchar_t path_w[MAX_PATH];
3739
3740 filename_to_utf16 (path, path_w);
3741 return _wmkdir (path_w);
3742 }
3743 else
3744 {
3745 char path_a[MAX_PATH];
3746
3747 filename_to_ansi (path, path_a);
3748 return _mkdir (path_a);
3749 }
480b0c5b
GV		 3750}
3751
63f5c6c2
EZ		 3752int
3753sys_open (const char * path, int oflag, int mode)
3754{
3755 const char* mpath = map_w32_filename (path, NULL);
3756 int res = -1;
3757
44b32251
EZ		 3758 if (w32_unicode_filenames)
3759 {
3760 wchar_t mpath_w[MAX_PATH];
3761
3762 filename_to_utf16 (mpath, mpath_w);
3763 /* If possible, try to open file without _O_CREAT, to be able to
3764 write to existing hidden and system files. Force all file
3765 handles to be non-inheritable. */
3766 if ((oflag & (_O_CREAT | _O_EXCL)) != (_O_CREAT | _O_EXCL))
3767 res = _wopen (mpath_w, (oflag & ~_O_CREAT) | _O_NOINHERIT, mode);
3768 if (res < 0)
3769 res = _wopen (mpath_w, oflag | _O_NOINHERIT, mode);
3770 }
3771 else
3772 {
3773 char mpath_a[MAX_PATH];
3774
3775 filename_to_ansi (mpath, mpath_a);
3776 if ((oflag & (_O_CREAT | _O_EXCL)) != (_O_CREAT | _O_EXCL))
3777 res = _open (mpath_a, (oflag & ~_O_CREAT) | _O_NOINHERIT, mode);
3778 if (res < 0)
3779 res = _open (mpath_a, oflag | _O_NOINHERIT, mode);
3780 }
63f5c6c2
EZ		 3781
3782 return res;
3783}
3784
3785/* Implementation of mkostemp for MS-Windows, to avoid race conditions
3786 when using mktemp.
3787
3788 Standard algorithm for generating a temporary file name seems to be
3789 use pid or tid with a letter on the front (in place of the 6 X's)
3790 and cycle through the letters to find a unique name. We extend
3791 that to allow any reasonable character as the first of the 6 X's,
3792 so that the number of simultaneously used temporary files will be
3793 greater. */
3794
3795int
3796mkostemp (char * template, int flags)
480b0c5b 3797{
9d1778b1 3798 char * p;
63f5c6c2 3799 int i, fd = -1;
9d1778b1 3800 unsigned uid = GetCurrentThreadId ();
63f5c6c2 3801 int save_errno = errno;
9d1778b1
RS		 3802 static char first_char[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#";
3803
63f5c6c2 3804 errno = EINVAL;
9d1778b1 3805 if (template == NULL)
63f5c6c2
EZ		 3806 return -1;
3807
9d1778b1
RS		 3808 p = template + strlen (template);
3809 i = 5;
3810 /* replace up to the last 5 X's with uid in decimal */
3811 while (--p >= template && p[0] == 'X' && --i >= 0)
3812 {
3813 p[0] = '0' + uid % 10;
3814 uid /= 10;
3815 }
3816
3817 if (i < 0 && p[0] == 'X')
3818 {
3819 i = 0;
3820 do
3821 {
9d1778b1 3822 p[0] = first_char[i];
63f5c6c2
EZ		 3823 if ((fd = sys_open (template,
3824 flags | _O_CREAT | _O_EXCL | _O_RDWR,
3825 S_IRUSR | S_IWUSR)) >= 0
3826 || errno != EEXIST)
9d1778b1 3827 {
63f5c6c2
EZ		 3828 if (fd >= 0)
3829 errno = save_errno;
3830 return fd;
9d1778b1
RS		 3831 }
3832 }
3833 while (++i < sizeof (first_char));
3834 }
3835
63f5c6c2
EZ		 3836 /* Template is badly formed or else we can't generate a unique name. */
3837 return -1;
480b0c5b
GV		 3838}
3839
3840int
70743157
PE		 3841fchmod (int fd, mode_t mode)
3842{
3843 return 0;
3844}
3845
3846int
3847sys_rename_replace (const char *oldname, const char *newname, BOOL force)
480b0c5b 3848{
cfb5e855 3849 BOOL result;
f5c287f4 3850 char temp[MAX_UTF8_PATH], temp_a[MAX_PATH];;
069d2b50
L		 3851 int newname_dev;
3852 int oldname_dev;
f5c287f4 3853 bool have_temp_a = false;
480b0c5b 3854
e9e23e23 3855 /* MoveFile on Windows 95 doesn't correctly change the short file name
5162ffce
MB		 3856 alias in a number of circumstances (it is not easy to predict when
3857 just by looking at oldname and newname, unfortunately). In these
3858 cases, renaming through a temporary name avoids the problem.
3859
e9e23e23 3860 A second problem on Windows 95 is that renaming through a temp name when
5162ffce
MB		 3861 newname is uppercase fails (the final long name ends up in
3862 lowercase, although the short alias might be uppercase) UNLESS the
3863 long temp name is not 8.3.
3864
e9e23e23 3865 So, on Windows 95 we always rename through a temp name, and we make sure
5162ffce 3866 the temp name has a long extension to ensure correct renaming. */
480b0c5b 3867
fbd6baed 3868 strcpy (temp, map_w32_filename (oldname, NULL));
480b0c5b 3869
069d2b50
L		 3870 /* volume_info is set indirectly by map_w32_filename. */
3871 oldname_dev = volume_info.serialnum;
3872
417a7a0e 3873 if (os_subtype == OS_9X)
480b0c5b 3874 {
b3308d2e 3875 char * o;
480b0c5b 3876 char * p;
b3308d2e 3877 int i = 0;
f5c287f4 3878 char oldname_a[MAX_PATH];
b3308d2e
KH		 3879
3880 oldname = map_w32_filename (oldname, NULL);
f5c287f4
EZ		 3881 filename_to_ansi (oldname, oldname_a);
3882 filename_to_ansi (temp, temp_a);
3883 if ((o = strrchr (oldname_a, '\\')))
b3308d2e
KH		 3884 o++;
3885 else
f5c287f4 3886 o = (char *) oldname_a;
480b0c5b 3887
f5c287f4 3888 if ((p = strrchr (temp_a, '\\')))
480b0c5b
GV		 3889 p++;
3890 else
f5c287f4 3891 p = temp_a;
b3308d2e
KH		 3892
3893 do
3894 {
3895 /* Force temp name to require a manufactured 8.3 alias - this
3896 seems to make the second rename work properly. */
f313ee82 3897 sprintf (p, "_.%s.%u", o, i);
b3308d2e 3898 i++;
f5c287f4 3899 result = rename (oldname_a, temp_a);
b3308d2e
KH		 3900 }
3901 /* This loop must surely terminate! */
cfb5e855 3902 while (result < 0 && errno == EEXIST);
58f0cb7e 3903 if (result < 0)
480b0c5b 3904 return -1;
f5c287f4 3905 have_temp_a = true;
480b0c5b
GV		 3906 }
3907
70743157 3908 /* If FORCE, emulate Unix behavior - newname is deleted if it already exists
5162ffce 3909 (at least if it is a file; don't do this for directories).
76b3903d 3910
b3308d2e
KH		 3911 Since we mustn't do this if we are just changing the case of the
3912 file name (we would end up deleting the file we are trying to
3913 rename!), we let rename detect if the destination file already
3914 exists - that way we avoid the possible pitfalls of trying to
3915 determine ourselves whether two names really refer to the same
3916 file, which is not always possible in the general case. (Consider
3917 all the permutations of shared or subst'd drives, etc.) */
3918
3919 newname = map_w32_filename (newname, NULL);
069d2b50
L		 3920
3921 /* volume_info is set indirectly by map_w32_filename. */
3922 newname_dev = volume_info.serialnum;
3923
f5c287f4 3924 if (w32_unicode_filenames)
069d2b50 3925 {
f5c287f4 3926 wchar_t temp_w[MAX_PATH], newname_w[MAX_PATH];
069d2b50 3927
f5c287f4
EZ		 3928 filename_to_utf16 (temp, temp_w);
3929 filename_to_utf16 (newname, newname_w);
3930 result = _wrename (temp_w, newname_w);
3931 if (result < 0 && force)
069d2b50 3932 {
f5c287f4
EZ		 3933 DWORD w32err = GetLastError ();
3934
3935 if (errno == EACCES
3936 && newname_dev != oldname_dev)
3937 {
3938 /* The implementation of `rename' on Windows does not return
3939 errno = EXDEV when you are moving a directory to a
3940 different storage device (ex. logical disk). It returns
3941 EACCES instead. So here we handle such situations and
3942 return EXDEV. */
3943 DWORD attributes;
3944
3945 if ((attributes = GetFileAttributesW (temp_w)) != -1
3946 && (attributes & FILE_ATTRIBUTE_DIRECTORY))
3947 errno = EXDEV;
3948 }
3949 else if (errno == EEXIST)
3950 {
3951 if (_wchmod (newname_w, 0666) != 0)
3952 return result;
3953 if (_wunlink (newname_w) != 0)
3954 return result;
3955 result = _wrename (temp_w, newname_w);
3956 }
3957 else if (w32err == ERROR_PRIVILEGE_NOT_HELD
3958 && is_symlink (temp))
3959 {
3960 /* This is Windows prohibiting the user from creating a
3961 symlink in another place, since that requires
3962 privileges. */
3963 errno = EPERM;
3964 }
069d2b50 3965 }
f5c287f4
EZ		 3966 }
3967 else
3968 {
3969 char newname_a[MAX_PATH];
3970
3971 if (!have_temp_a)
3972 filename_to_ansi (temp, temp_a);
3973 filename_to_ansi (newname, newname_a);
3974 result = rename (temp_a, newname_a);
3975 if (result < 0 && force)
6dad7178 3976 {
f5c287f4
EZ		 3977 DWORD w32err = GetLastError ();
3978
3979 if (errno == EACCES
3980 && newname_dev != oldname_dev)
3981 {
3982 DWORD attributes;
3983
3984 if ((attributes = GetFileAttributesA (temp_a)) != -1
3985 && (attributes & FILE_ATTRIBUTE_DIRECTORY))
3986 errno = EXDEV;
3987 }
3988 else if (errno == EEXIST)
3989 {
3990 if (_chmod (newname_a, 0666) != 0)
3991 return result;
3992 if (_unlink (newname_a) != 0)
3993 return result;
3994 result = rename (temp_a, newname_a);
3995 }
3996 else if (w32err == ERROR_PRIVILEGE_NOT_HELD
3997 && is_symlink (temp))
3998 errno = EPERM;
6dad7178 3999 }
069d2b50 4000 }
480b0c5b 4001
eb9ea53f 4002 return result;
480b0c5b
GV		 4003}
4004
70743157
PE		 4005int
4006sys_rename (char const *old, char const *new)
4007{
4008 return sys_rename_replace (old, new, TRUE);
4009}
4010
480b0c5b
GV		 4011int
4012sys_rmdir (const char * path)
4013{
fbd6baed 4014 return _rmdir (map_w32_filename (path, NULL));
480b0c5b
GV		 4015}
4016
4017int
4018sys_unlink (const char * path)
4019{
16bb7578
GV		 4020 path = map_w32_filename (path, NULL);
4021
4022 /* On Unix, unlink works without write permission. */
4023 _chmod (path, 0666);
4024 return _unlink (path);
480b0c5b
GV		 4025}
4026
4027static FILETIME utc_base_ft;
5da9424d 4028static ULONGLONG utc_base; /* In 100ns units */
480b0c5b
GV		 4029static int init = 0;
4030
5da9424d
JB		 4031#define FILETIME_TO_U64(result, ft) \
4032 do { \
4033 ULARGE_INTEGER uiTemp; \
4034 uiTemp.LowPart = (ft).dwLowDateTime; \
4035 uiTemp.HighPart = (ft).dwHighDateTime; \
4036 result = uiTemp.QuadPart; \
4037 } while (0)
4038
4039static void
b56ceb92 4040initialize_utc_base (void)
7c80d5ec 4041{
5da9424d
JB		 4042 /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */
4043 SYSTEMTIME st;
4044
4045 st.wYear = 1970;
4046 st.wMonth = 1;
4047 st.wDay = 1;
4048 st.wHour = 0;
4049 st.wMinute = 0;
4050 st.wSecond = 0;
4051 st.wMilliseconds = 0;
4052
4053 SystemTimeToFileTime (&st, &utc_base_ft);
4054 FILETIME_TO_U64 (utc_base, utc_base_ft);
7c80d5ec
EZ		 4055}
4056
480b0c5b
GV		 4057static time_t
4058convert_time (FILETIME ft)
4059{
5da9424d 4060 ULONGLONG tmp;
480b0c5b
GV		 4061
4062 if (!init)
4063 {
9d4f32e8 4064 initialize_utc_base ();
480b0c5b
GV		 4065 init = 1;
4066 }
4067
4068 if (CompareFileTime (&ft, &utc_base_ft) < 0)
4069 return 0;
4070
5da9424d
JB		 4071 FILETIME_TO_U64 (tmp, ft);
4072 return (time_t) ((tmp - utc_base) / 10000000L);
480b0c5b
GV		 4073}
4074
bedf4aab 4075static void
480b0c5b
GV		 4076convert_from_time_t (time_t time, FILETIME * pft)
4077{
5da9424d 4078 ULARGE_INTEGER tmp;
480b0c5b
GV		 4079
4080 if (!init)
4081 {
5da9424d 4082 initialize_utc_base ();
480b0c5b
GV		 4083 init = 1;
4084 }
4085
4086 /* time in 100ns units since 1-Jan-1601 */
5da9424d
JB		 4087 tmp.QuadPart = (ULONGLONG) time * 10000000L + utc_base;
4088 pft->dwHighDateTime = tmp.HighPart;
4089 pft->dwLowDateTime = tmp.LowPart;
480b0c5b 4090}
480b0c5b 4091
8aaaec6b 4092static PSECURITY_DESCRIPTOR
6dad7178
EZ		 4093get_file_security_desc_by_handle (HANDLE h)
4094{
4095 PSECURITY_DESCRIPTOR psd = NULL;
4096 DWORD err;
4097 SECURITY_INFORMATION si = OWNER_SECURITY_INFORMATION
4098 | GROUP_SECURITY_INFORMATION /* | DACL_SECURITY_INFORMATION */ ;
4099
4100 err = get_security_info (h, SE_FILE_OBJECT, si,
4101 NULL, NULL, NULL, NULL, &psd);
4102 if (err != ERROR_SUCCESS)
4103 return NULL;
4104
4105 return psd;
4106}
4107
4108static PSECURITY_DESCRIPTOR
4109get_file_security_desc_by_name (const char *fname)
8aaaec6b
EZ		 4110{
4111 PSECURITY_DESCRIPTOR psd = NULL;
4112 DWORD sd_len, err;
4113 SECURITY_INFORMATION si = OWNER_SECURITY_INFORMATION
4114 | GROUP_SECURITY_INFORMATION /* | DACL_SECURITY_INFORMATION */ ;
4115
4116 if (!get_file_security (fname, si, psd, 0, &sd_len))
4117 {
4118 err = GetLastError ();
4119 if (err != ERROR_INSUFFICIENT_BUFFER)
4120 return NULL;
4121 }
4122
4123 psd = xmalloc (sd_len);
4124 if (!get_file_security (fname, si, psd, sd_len, &sd_len))
4125 {
4126 xfree (psd);
4127 return NULL;
4128 }
4129
4130 return psd;
4131}
4132
4133static DWORD
4134get_rid (PSID sid)
4135{
4136 unsigned n_subauthorities;
4137
4138 /* Use the last sub-authority value of the RID, the relative
4139 portion of the SID, as user/group ID. */
4140 n_subauthorities = *get_sid_sub_authority_count (sid);
4141 if (n_subauthorities < 1)
4142 return 0; /* the "World" RID */
4143 return *get_sid_sub_authority (sid, n_subauthorities - 1);
4144}
4145
f8b35b24
EZ		 4146/* Caching SID and account values for faster lokup. */
4147
f8b35b24 4148struct w32_id {
22749e9a 4149 unsigned rid;
f8b35b24
EZ		 4150 struct w32_id *next;
4151 char name[GNLEN+1];
4152 unsigned char sid[FLEXIBLE_ARRAY_MEMBER];
4153};
4154
4155static struct w32_id *w32_idlist;
4156
4157static int
22749e9a 4158w32_cached_id (PSID sid, unsigned *id, char *name)
f8b35b24
EZ		 4159{
4160 struct w32_id *tail, *found;
4161
4162 for (found = NULL, tail = w32_idlist; tail; tail = tail->next)
4163 {
4164 if (equal_sid ((PSID)tail->sid, sid))
4165 {
4166 found = tail;
4167 break;
4168 }
4169 }
4170 if (found)
4171 {
4172 *id = found->rid;
4173 strcpy (name, found->name);
4174 return 1;
4175 }
4176 else
4177 return 0;
4178}
4179
4180static void
22749e9a 4181w32_add_to_cache (PSID sid, unsigned id, char *name)
f8b35b24
EZ		 4182{
4183 DWORD sid_len;
4184 struct w32_id *new_entry;
4185
4186 /* We don't want to leave behind stale cache from when Emacs was
4187 dumped. */
4188 if (initialized)
4189 {
4190 sid_len = get_length_sid (sid);
4191 new_entry = xmalloc (offsetof (struct w32_id, sid) + sid_len);
4192 if (new_entry)
4193 {
4194 new_entry->rid = id;
4195 strcpy (new_entry->name, name);
4196 copy_sid (sid_len, (PSID)new_entry->sid, sid);
4197 new_entry->next = w32_idlist;
4198 w32_idlist = new_entry;
4199 }
4200 }
4201}
4202
8aaaec6b
EZ		 4203#define UID 1
4204#define GID 2
4205
4206static int
92340ec7 4207get_name_and_id (PSECURITY_DESCRIPTOR psd, unsigned *id, char *nm, int what)
8aaaec6b
EZ		 4208{
4209 PSID sid = NULL;
8aaaec6b
EZ		 4210 BOOL dflt;
4211 SID_NAME_USE ignore;
4212 char name[UNLEN+1];
4213 DWORD name_len = sizeof (name);
4214 char domain[1024];
ed3751c8 4215 DWORD domain_len = sizeof (domain);
8aaaec6b
EZ		 4216 int use_dflt = 0;
4217 int result;
4218
4219 if (what == UID)
4220 result = get_security_descriptor_owner (psd, &sid, &dflt);
4221 else if (what == GID)
4222 result = get_security_descriptor_group (psd, &sid, &dflt);
4223 else
4224 result = 0;
4225
4226 if (!result || !is_valid_sid (sid))
4227 use_dflt = 1;
f8b35b24 4228 else if (!w32_cached_id (sid, id, nm))
8aaaec6b 4229 {
92340ec7 4230 if (!lookup_account_sid (NULL, sid, name, &name_len,
8aaaec6b
EZ		 4231 domain, &domain_len, &ignore)
4232 || name_len > UNLEN+1)
4233 use_dflt = 1;
4234 else
4235 {
4236 *id = get_rid (sid);
4237 strcpy (nm, name);
f8b35b24 4238 w32_add_to_cache (sid, *id, name);
8aaaec6b
EZ		 4239 }
4240 }
4241 return use_dflt;
4242}
4243
4244static void
92340ec7 4245get_file_owner_and_group (PSECURITY_DESCRIPTOR psd, struct stat *st)
8aaaec6b
EZ		 4246{
4247 int dflt_usr = 0, dflt_grp = 0;
4248
4249 if (!psd)
4250 {
4251 dflt_usr = 1;
4252 dflt_grp = 1;
4253 }
4254 else
4255 {
92340ec7 4256 if (get_name_and_id (psd, &st->st_uid, st->st_uname, UID))
8aaaec6b 4257 dflt_usr = 1;
92340ec7 4258 if (get_name_and_id (psd, &st->st_gid, st->st_gname, GID))
8aaaec6b
EZ		 4259 dflt_grp = 1;
4260 }
4261 /* Consider files to belong to current user/group, if we cannot get
4262 more accurate information. */
4263 if (dflt_usr)
4264 {
4265 st->st_uid = dflt_passwd.pw_uid;
4266 strcpy (st->st_uname, dflt_passwd.pw_name);
4267 }
4268 if (dflt_grp)
4269 {
4270 st->st_gid = dflt_passwd.pw_gid;
4271 strcpy (st->st_gname, dflt_group.gr_name);
4272 }
4273}
4274
be4c6380
EZ		 4275/* Return non-zero if NAME is a potentially slow filesystem. */
4276int
4277is_slow_fs (const char *name)
4278{
4279 char drive_root[4];
4280 UINT devtype;
4281
4282 if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1]))
4283 devtype = DRIVE_REMOTE; /* assume UNC name is remote */
4284 else if (!(strlen (name) >= 2 && IS_DEVICE_SEP (name[1])))
4285 devtype = GetDriveType (NULL); /* use root of current drive */
4286 else
4287 {
4288 /* GetDriveType needs the root directory of the drive. */
4289 strncpy (drive_root, name, 2);
4290 drive_root[2] = '\\';
4291 drive_root[3] = '\0';
4292 devtype = GetDriveType (drive_root);
4293 }
4294 return !(devtype == DRIVE_FIXED || devtype == DRIVE_RAMDISK);
4295}
4296
5c207910
EZ		 4297/* If this is non-zero, the caller wants accurate information about
4298 file's owner and group, which could be expensive to get. */
4299int w32_stat_get_owner_group;
4300
480b0c5b
GV		 4301/* MSVC stat function can't cope with UNC names and has other bugs, so
4302 replace it with our own. This also allows us to calculate consistent
6dad7178
EZ		 4303 inode values and owner/group without hacks in the main Emacs code. */
4304
4305static int
4306stat_worker (const char * path, struct stat * buf, int follow_symlinks)
480b0c5b 4307{
6dad7178 4308 char *name, *save_name, *r;
480b0c5b
GV		 4309 WIN32_FIND_DATA wfd;
4310 HANDLE fh;
6dad7178 4311 unsigned __int64 fake_inode = 0;
480b0c5b
GV		 4312 int permission;
4313 int len;
4314 int rootdir = FALSE;
8aaaec6b 4315 PSECURITY_DESCRIPTOR psd = NULL;
6dad7178
EZ		 4316 int is_a_symlink = 0;
4317 DWORD file_flags = FILE_FLAG_BACKUP_SEMANTICS;
4318 DWORD access_rights = 0;
4319 DWORD fattrs = 0, serialnum = 0, fs_high = 0, fs_low = 0, nlinks = 1;
4320 FILETIME ctime, atime, wtime;
806fed21 4321 int dbcs_p;
480b0c5b
GV		 4322
4323 if (path == NULL || buf == NULL)
4324 {
4325 errno = EFAULT;
4326 return -1;
4327 }
4328
6dad7178 4329 save_name = name = (char *) map_w32_filename (path, &path);
22189f79
EZ		 4330 /* Must be valid filename, no wild cards or other invalid
4331 characters. We use _mbspbrk to support multibyte strings that
4332 might look to strpbrk as if they included literal *, ?, and other
4333 characters mentioned below that are disallowed by Windows
4334 filesystems. */
4335 if (_mbspbrk (name, "*?|<>\""))
480b0c5b
GV		 4336 {
4337 errno = ENOENT;
4338 return -1;
4339 }
4340
4341 /* Remove trailing directory separator, unless name is the root
4342 directory of a drive or UNC volume in which case ensure there
4343 is a trailing separator. */
4344 len = strlen (name);
480b0c5b
GV		 4345 name = strcpy (alloca (len + 2), name);
4346
6dad7178
EZ		 4347 /* Avoid a somewhat costly call to is_symlink if the filesystem
4348 doesn't support symlinks. */
4349 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
4350 is_a_symlink = is_symlink (name);
4351
4352 /* Plan A: Open the file and get all the necessary information via
4353 the resulting handle. This solves several issues in one blow:
4354
4355 . retrieves attributes for the target of a symlink, if needed
4356 . gets attributes of root directories and symlinks pointing to
4357 root directories, thus avoiding the need for special-casing
4358 these and detecting them by examining the file-name format
4359 . retrieves more accurate attributes (e.g., non-zero size for
4360 some directories, esp. directories that are junction points)
4361 . correctly resolves "c:/..", "/.." and similar file names
4362 . avoids run-time penalties for 99% of use cases
4363
4364 Plan A is always tried first, unless the user asked not to (but
4365 if the file is a symlink and we need to follow links, we try Plan
4366 A even if the user asked not to).
4367
4368 If Plan A fails, we go to Plan B (below), where various
4369 potentially expensive techniques must be used to handle "special"
4370 files such as UNC volumes etc. */
8aaaec6b 4371 if (!(NILP (Vw32_get_true_file_attributes)
19ced600 4372 || (EQ (Vw32_get_true_file_attributes, Qlocal) && is_slow_fs (name)))
6dad7178
EZ		 4373 /* Following symlinks requires getting the info by handle. */
4374 || (is_a_symlink && follow_symlinks))
480b0c5b 4375 {
6dad7178
EZ		 4376 BY_HANDLE_FILE_INFORMATION info;
4377
4378 if (is_a_symlink && !follow_symlinks)
4379 file_flags |= FILE_FLAG_OPEN_REPARSE_POINT;
4380 /* READ_CONTROL access rights are required to get security info
4381 by handle. But if the OS doesn't support security in the
4382 first place, we don't need to try. */
4383 if (is_windows_9x () != TRUE)
4384 access_rights |= READ_CONTROL;
4385
4386 fh = CreateFile (name, access_rights, 0, NULL, OPEN_EXISTING,
4387 file_flags, NULL);
4388 /* If CreateFile fails with READ_CONTROL, try again with zero as
4389 access rights. */
4390 if (fh == INVALID_HANDLE_VALUE && access_rights)
4391 fh = CreateFile (name, 0, 0, NULL, OPEN_EXISTING,
4392 file_flags, NULL);
4393 if (fh == INVALID_HANDLE_VALUE)
4394 goto no_true_file_attributes;
4395
3ed8598c 4396 /* This is more accurate in terms of getting the correct number
aa5ee2a3 4397 of links, but is quite slow (it is noticeable when Emacs is
480b0c5b 4398 making a list of file name completions). */
480b0c5b
GV		 4399 if (GetFileInformationByHandle (fh, &info))
4400 {
6dad7178 4401 nlinks = info.nNumberOfLinks;
76b3903d
GV		 4402 /* Might as well use file index to fake inode values, but this
4403 is not guaranteed to be unique unless we keep a handle open
4404 all the time (even then there are situations where it is
4405 not unique). Reputedly, there are at most 48 bits of info
4406 (on NTFS, presumably less on FAT). */
e3b88685
EZ		 4407 fake_inode = info.nFileIndexHigh;
4408 fake_inode <<= 32;
4409 fake_inode += info.nFileIndexLow;
6dad7178
EZ		 4410 serialnum = info.dwVolumeSerialNumber;
4411 fs_high = info.nFileSizeHigh;
4412 fs_low = info.nFileSizeLow;
4413 ctime = info.ftCreationTime;
4414 atime = info.ftLastAccessTime;
4415 wtime = info.ftLastWriteTime;
4416 fattrs = info.dwFileAttributes;
480b0c5b
GV		 4417 }
4418 else
4419 {
6dad7178
EZ		 4420 /* We don't go to Plan B here, because it's not clear that
4421 it's a good idea. The only known use case where
4422 CreateFile succeeds, but GetFileInformationByHandle fails
4423 (with ERROR_INVALID_FUNCTION) is for character devices
4424 such as NUL, PRN, etc. For these, switching to Plan B is
4425 a net loss, because we lose the character device
4426 attribute returned by GetFileType below (FindFirstFile
4427 doesn't set that bit in the attributes), and the other
4428 fields don't make sense for character devices anyway.
4429 Emacs doesn't really care for non-file entities in the
4430 context of l?stat, so neither do we. */
4431
4432 /* w32err is assigned so one could put a breakpoint here and
4433 examine its value, when GetFileInformationByHandle
4434 fails. */
4435 DWORD w32err = GetLastError ();
4436
4437 switch (w32err)
4438 {
4439 case ERROR_FILE_NOT_FOUND: /* can this ever happen? */
4440 errno = ENOENT;
4441 return -1;
4442 }
01f31dfb
AI		 4443 }
4444
6dad7178
EZ		 4445 /* Test for a symlink before testing for a directory, since
4446 symlinks to directories have the directory bit set, but we
4447 don't want them to appear as directories. */
4448 if (is_a_symlink && !follow_symlinks)
4449 buf->st_mode = S_IFLNK;
4450 else if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
4451 buf->st_mode = S_IFDIR;
93e0f0da
JR		 4452 else
4453 {
6dad7178
EZ		 4454 DWORD ftype = GetFileType (fh);
4455
4456 switch (ftype)
93e0f0da
JR		 4457 {
4458 case FILE_TYPE_DISK:
e3b88685 4459 buf->st_mode = S_IFREG;
93e0f0da
JR		 4460 break;
4461 case FILE_TYPE_PIPE:
e3b88685 4462 buf->st_mode = S_IFIFO;
93e0f0da
JR		 4463 break;
4464 case FILE_TYPE_CHAR:
4465 case FILE_TYPE_UNKNOWN:
4466 default:
e3b88685 4467 buf->st_mode = S_IFCHR;
93e0f0da 4468 }
480b0c5b 4469 }
6dad7178
EZ		 4470 /* We produce the fallback owner and group data, based on the
4471 current user that runs Emacs, in the following cases:
4472
5c207910 4473 . caller didn't request owner and group info
6dad7178
EZ		 4474 . this is Windows 9X
4475 . getting security by handle failed, and we need to produce
4476 information for the target of a symlink (this is better
4477 than producing a potentially misleading info about the
4478 symlink itself)
4479
4480 If getting security by handle fails, and we don't need to
4481 resolve symlinks, we try getting security by name. */
5c207910 4482 if (!w32_stat_get_owner_group || is_windows_9x () == TRUE)
92340ec7 4483 get_file_owner_and_group (NULL, buf);
5c207910 4484 else
6dad7178 4485 {
5c207910
EZ		 4486 psd = get_file_security_desc_by_handle (fh);
4487 if (psd)
4488 {
a4b0cca1 4489 get_file_owner_and_group (psd, buf);
5c207910
EZ		 4490 LocalFree (psd);
4491 }
4492 else if (!(is_a_symlink && follow_symlinks))
4493 {
4494 psd = get_file_security_desc_by_name (name);
a4b0cca1 4495 get_file_owner_and_group (psd, buf);
5c207910
EZ		 4496 xfree (psd);
4497 }
4498 else
a4b0cca1 4499 get_file_owner_and_group (NULL, buf);
6dad7178 4500 }
01f31dfb 4501 CloseHandle (fh);
76b3903d
GV		 4502 }
4503 else
4504 {
6dad7178
EZ		 4505 no_true_file_attributes:
4506 /* Plan B: Either getting a handle on the file failed, or the
4507 caller explicitly asked us to not bother making this
4508 information more accurate.
4509
4510 Implementation note: In Plan B, we never bother to resolve
4511 symlinks, even if we got here because we tried Plan A and
4512 failed. That's because, even if the caller asked for extra
4513 precision by setting Vw32_get_true_file_attributes to t,
4514 resolving symlinks requires acquiring a file handle to the
4515 symlink, which we already know will fail. And if the user
4516 did not ask for extra precision, resolving symlinks will fly
4517 in the face of that request, since the user then wants the
4518 lightweight version of the code. */
806fed21 4519 dbcs_p = max_filename_mbslen () > 1;
6dad7178
EZ		 4520 rootdir = (path >= save_name + len - 1
4521 && (IS_DIRECTORY_SEP (*path) || *path == 0));
4522
4523 /* If name is "c:/.." or "/.." then stat "c:/" or "/". */
4524 r = IS_DEVICE_SEP (name[1]) ? &name[2] : name;
4525 if (IS_DIRECTORY_SEP (r[0])
4526 && r[1] == '.' && r[2] == '.' && r[3] == '\0')
4527 r[1] = r[2] = '\0';
4528
4529 /* Note: If NAME is a symlink to the root of a UNC volume
4530 (i.e. "\\SERVER"), we will not detect that here, and we will
4531 return data about the symlink as result of FindFirst below.
4532 This is unfortunate, but that marginal use case does not
4533 justify a call to chase_symlinks which would impose a penalty
4534 on all the other use cases. (We get here for symlinks to
4535 roots of UNC volumes because CreateFile above fails for them,
4536 unlike with symlinks to root directories X:\ of drives.) */
4537 if (is_unc_volume (name))
4538 {
4539 fattrs = unc_volume_file_attributes (name);
4540 if (fattrs == -1)
4541 return -1;
4542
4543 ctime = atime = wtime = utc_base_ft;
4544 }
4545 else if (rootdir)
4546 {
806fed21
EZ		 4547 if (!dbcs_p)
4548 {
4549 if (!IS_DIRECTORY_SEP (name[len-1]))
4550 strcat (name, "\\");
4551 }
4552 else
4553 {
4554 char *end = name + len;
4555 char *n = CharPrevExA (file_name_codepage, name, end, 0);
4556
4557 if (!IS_DIRECTORY_SEP (*n))
4558 strcat (name, "\\");
4559 }
6dad7178
EZ		 4560 if (GetDriveType (name) < 2)
4561 {
4562 errno = ENOENT;
4563 return -1;
4564 }
4565
4566 fattrs = FILE_ATTRIBUTE_DIRECTORY;
4567 ctime = atime = wtime = utc_base_ft;
4568 }
4569 else
4570 {
806fed21
EZ		 4571 if (!dbcs_p)
4572 {
4573 if (IS_DIRECTORY_SEP (name[len-1]))
4574 name[len - 1] = 0;
4575 }
4576 else
4577 {
4578 char *end = name + len;
4579 char *n = CharPrevExA (file_name_codepage, name, end, 0);
4580
4581 if (IS_DIRECTORY_SEP (*n))
4582 *n = 0;
4583 }
6dad7178
EZ		 4584
4585 /* (This is hacky, but helps when doing file completions on
4586 network drives.) Optimize by using information available from
4587 active readdir if possible. */
4588 len = strlen (dir_pathname);
806fed21
EZ		 4589 if (!dbcs_p)
4590 {
4591 if (IS_DIRECTORY_SEP (dir_pathname[len-1]))
4592 len--;
4593 }
4594 else
4595 {
4596 char *end = dir_pathname + len;
4597 char *n = CharPrevExA (file_name_codepage, dir_pathname, end, 0);
4598
4599 if (IS_DIRECTORY_SEP (*n))
4600 len--;
4601 }
6dad7178
EZ		 4602 if (dir_find_handle != INVALID_HANDLE_VALUE
4603 && !(is_a_symlink && follow_symlinks)
4604 && strnicmp (save_name, dir_pathname, len) == 0
4605 && IS_DIRECTORY_SEP (name[len])
4606 && xstrcasecmp (name + len + 1, dir_static.d_name) == 0)
4607 {
4608 /* This was the last entry returned by readdir. */
0b9de7cd 4609 wfd = dir_find_data_a; /* FIXME!!! */
6dad7178
EZ		 4610 }
4611 else
4612 {
4613 logon_network_drive (name);
4614
4615 fh = FindFirstFile (name, &wfd);
4616 if (fh == INVALID_HANDLE_VALUE)
4617 {
4618 errno = ENOENT;
4619 return -1;
4620 }
4621 FindClose (fh);
4622 }
4623 /* Note: if NAME is a symlink, the information we get from
4624 FindFirstFile is for the symlink, not its target. */
4625 fattrs = wfd.dwFileAttributes;
4626 ctime = wfd.ftCreationTime;
4627 atime = wfd.ftLastAccessTime;
4628 wtime = wfd.ftLastWriteTime;
4629 fs_high = wfd.nFileSizeHigh;
4630 fs_low = wfd.nFileSizeLow;
4631 fake_inode = 0;
4632 nlinks = 1;
4633 serialnum = volume_info.serialnum;
4634 }
4635 if (is_a_symlink && !follow_symlinks)
4636 buf->st_mode = S_IFLNK;
4637 else if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
4638 buf->st_mode = S_IFDIR;
4639 else
4640 buf->st_mode = S_IFREG;
8aaaec6b 4641
92340ec7 4642 get_file_owner_and_group (NULL, buf);
76b3903d
GV		 4643 }
4644
4645#if 0
4646 /* Not sure if there is any point in this. */
4647 if (!NILP (Vw32_generate_fake_inodes))
4648 fake_inode = generate_inode_val (name);
4649 else if (fake_inode == 0)
4650 {
4651 /* For want of something better, try to make everything unique. */
4652 static DWORD gen_num = 0;
4653 fake_inode = ++gen_num;
480b0c5b 4654 }
76b3903d
GV		 4655#endif
4656
6dad7178 4657 buf->st_ino = fake_inode;
480b0c5b 4658
6dad7178
EZ		 4659 buf->st_dev = serialnum;
4660 buf->st_rdev = serialnum;
480b0c5b 4661
6dad7178 4662 buf->st_size = fs_high;
8aaaec6b 4663 buf->st_size <<= 32;
6dad7178
EZ		 4664 buf->st_size += fs_low;
4665 buf->st_nlink = nlinks;
480b0c5b
GV		 4666
4667 /* Convert timestamps to Unix format. */
6dad7178
EZ		 4668 buf->st_mtime = convert_time (wtime);
4669 buf->st_atime = convert_time (atime);
480b0c5b 4670 if (buf->st_atime == 0) buf->st_atime = buf->st_mtime;
6dad7178 4671 buf->st_ctime = convert_time (ctime);
480b0c5b
GV		 4672 if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime;
4673
4674 /* determine rwx permissions */
6dad7178
EZ		 4675 if (is_a_symlink && !follow_symlinks)
4676 permission = S_IREAD | S_IWRITE | S_IEXEC; /* Posix expectations */
480b0c5b 4677 else
6dad7178
EZ		 4678 {
4679 if (fattrs & FILE_ATTRIBUTE_READONLY)
4680 permission = S_IREAD;
4681 else
4682 permission = S_IREAD | S_IWRITE;
177c0ea7 4683
6dad7178
EZ		 4684 if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
4685 permission |= S_IEXEC;
4686 else if (is_exec (name))
4687 permission |= S_IEXEC;
4688 }
480b0c5b
GV		 4689
4690 buf->st_mode |= permission | (permission >> 3) | (permission >> 6);
4691
4692 return 0;
4693}
4694
6dad7178
EZ		 4695int
4696stat (const char * path, struct stat * buf)
4697{
4698 return stat_worker (path, buf, 1);
4699}
4700
4701int
4702lstat (const char * path, struct stat * buf)
4703{
4704 return stat_worker (path, buf, 0);
4705}
4706
8654f9d7
PE		 4707int
4708fstatat (int fd, char const *name, struct stat *st, int flags)
4709{
4710 /* Rely on a hack: an open directory is modeled as file descriptor 0.
4711 This is good enough for the current usage in Emacs, but is fragile.
4712
d9c287e5 4713 FIXME: Add proper support for fdopendir, fstatat, readlinkat.
8654f9d7
PE		 4714 Gnulib does this and can serve as a model. */
4715 char fullname[MAX_PATH];
4716
4717 if (fd != AT_FDCWD)
4718 {
4719 if (_snprintf (fullname, sizeof fullname, "%s/%s", dir_pathname, name)
4720 < 0)
4721 {
4722 errno = ENAMETOOLONG;
4723 return -1;
4724 }
4725 name = fullname;
4726 }
4727
4728 return stat_worker (name, st, ! (flags & AT_SYMLINK_NOFOLLOW));
4729}
4730
16bb7578
GV		 4731/* Provide fstat and utime as well as stat for consistent handling of
4732 file timestamps. */
4733int
4734fstat (int desc, struct stat * buf)
4735{
4736 HANDLE fh = (HANDLE) _get_osfhandle (desc);
4737 BY_HANDLE_FILE_INFORMATION info;
e3b88685 4738 unsigned __int64 fake_inode;
16bb7578
GV		 4739 int permission;
4740
4741 switch (GetFileType (fh) & ~FILE_TYPE_REMOTE)
4742 {
4743 case FILE_TYPE_DISK:
e3b88685 4744 buf->st_mode = S_IFREG;
16bb7578
GV		 4745 if (!GetFileInformationByHandle (fh, &info))
4746 {
4747 errno = EACCES;
4748 return -1;
4749 }
4750 break;
4751 case FILE_TYPE_PIPE:
e3b88685 4752 buf->st_mode = S_IFIFO;
16bb7578
GV		 4753 goto non_disk;
4754 case FILE_TYPE_CHAR:
4755 case FILE_TYPE_UNKNOWN:
4756 default:
e3b88685 4757 buf->st_mode = S_IFCHR;
16bb7578
GV		 4758 non_disk:
4759 memset (&info, 0, sizeof (info));
4760 info.dwFileAttributes = 0;
4761 info.ftCreationTime = utc_base_ft;
4762 info.ftLastAccessTime = utc_base_ft;
4763 info.ftLastWriteTime = utc_base_ft;
4764 }
4765
4766 if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
e3b88685 4767 buf->st_mode = S_IFDIR;
93e0f0da
JR		 4768
4769 buf->st_nlink = info.nNumberOfLinks;
4770 /* Might as well use file index to fake inode values, but this
4771 is not guaranteed to be unique unless we keep a handle open
4772 all the time (even then there are situations where it is
4773 not unique). Reputedly, there are at most 48 bits of info
4774 (on NTFS, presumably less on FAT). */
e3b88685
EZ		 4775 fake_inode = info.nFileIndexHigh;
4776 fake_inode <<= 32;
4777 fake_inode += info.nFileIndexLow;
16bb7578
GV		 4778
4779 /* MSVC defines _ino_t to be short; other libc's might not. */
4780 if (sizeof (buf->st_ino) == 2)
4781 buf->st_ino = fake_inode ^ (fake_inode >> 16);
4782 else
4783 buf->st_ino = fake_inode;
4784
76e9f7b9
EZ		 4785 /* If the caller so requested, get the true file owner and group.
4786 Otherwise, consider the file to belong to the current user. */
4787 if (!w32_stat_get_owner_group || is_windows_9x () == TRUE)
4788 get_file_owner_and_group (NULL, buf);
4789 else
4790 {
4791 PSECURITY_DESCRIPTOR psd = NULL;
4792
4793 psd = get_file_security_desc_by_handle (fh);
4794 if (psd)
4795 {
4796 get_file_owner_and_group (psd, buf);
4797 LocalFree (psd);
4798 }
4799 else
4800 get_file_owner_and_group (NULL, buf);
4801 }
16bb7578
GV		 4802
4803 buf->st_dev = info.dwVolumeSerialNumber;
4804 buf->st_rdev = info.dwVolumeSerialNumber;
4805
8aaaec6b
EZ		 4806 buf->st_size = info.nFileSizeHigh;
4807 buf->st_size <<= 32;
4808 buf->st_size += info.nFileSizeLow;
16bb7578
GV		 4809
4810 /* Convert timestamps to Unix format. */
4811 buf->st_mtime = convert_time (info.ftLastWriteTime);
4812 buf->st_atime = convert_time (info.ftLastAccessTime);
4813 if (buf->st_atime == 0) buf->st_atime = buf->st_mtime;
4814 buf->st_ctime = convert_time (info.ftCreationTime);
4815 if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime;
4816
4817 /* determine rwx permissions */
4818 if (info.dwFileAttributes & FILE_ATTRIBUTE_READONLY)
e3b88685 4819 permission = S_IREAD;
16bb7578 4820 else
e3b88685 4821 permission = S_IREAD | S_IWRITE;
177c0ea7 4822
16bb7578 4823 if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
e3b88685 4824 permission |= S_IEXEC;
16bb7578
GV		 4825 else
4826 {
4827#if 0 /* no way of knowing the filename */
4828 char * p = strrchr (name, '.');
4829 if (p != NULL &&
05131107
JR		 4830 (xstrcasecmp (p, ".exe") == 0 ||
4831 xstrcasecmp (p, ".com") == 0 ||
4832 xstrcasecmp (p, ".bat") == 0 ||
4833 xstrcasecmp (p, ".cmd") == 0))
e3b88685 4834 permission |= S_IEXEC;
16bb7578
GV		 4835#endif
4836 }
4837
4838 buf->st_mode |= permission | (permission >> 3) | (permission >> 6);
4839
4840 return 0;
4841}
4842
b34454d0
EZ		 4843/* A version of 'utime' which handles directories as well as
4844 files. */
4845
16bb7578 4846int
86e93460 4847utime (const char *name, struct utimbuf *times)
16bb7578 4848{
86e93460 4849 struct utimbuf deftime;
16bb7578
GV		 4850 HANDLE fh;
4851 FILETIME mtime;
4852 FILETIME atime;
4853
4854 if (times == NULL)
4855 {
4856 deftime.modtime = deftime.actime = time (NULL);
4857 times = &deftime;
4858 }
4859
80fcb9d2
EZ		 4860 if (w32_unicode_filenames)
4861 {
4862 wchar_t name_utf16[MAX_PATH];
4863
4864 if (filename_to_utf16 (name, name_utf16) != 0)
4865 return -1; /* errno set by filename_to_utf16 */
4866
4867 /* Need write access to set times. */
4868 fh = CreateFileW (name_utf16, FILE_WRITE_ATTRIBUTES,
4869 /* If NAME specifies a directory, FILE_SHARE_DELETE
4870 allows other processes to delete files inside it,
4871 while we have the directory open. */
4872 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
4873 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
4874 }
4875 else
4876 {
4877 char name_ansi[MAX_PATH];
4878
4879 if (filename_to_ansi (name, name_ansi) != 0)
4880 return -1; /* errno set by filename_to_ansi */
4881
4882 fh = CreateFileA (name_ansi, FILE_WRITE_ATTRIBUTES,
4883 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
4884 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
4885 }
7604f298 4886 if (fh != INVALID_HANDLE_VALUE)
16bb7578
GV		 4887 {
4888 convert_from_time_t (times->actime, &atime);
4889 convert_from_time_t (times->modtime, &mtime);
4890 if (!SetFileTime (fh, NULL, &atime, &mtime))
4891 {
4892 CloseHandle (fh);
4893 errno = EACCES;
4894 return -1;
4895 }
4896 CloseHandle (fh);
4897 }
4898 else
4899 {
80fcb9d2
EZ		 4900 DWORD err = GetLastError ();
4901
4902 switch (err)
4903 {
4904 case ERROR_FILE_NOT_FOUND:
4905 case ERROR_PATH_NOT_FOUND:
4906 case ERROR_INVALID_DRIVE:
4907 case ERROR_BAD_NETPATH:
4908 case ERROR_DEV_NOT_EXIST:
4909 /* ERROR_INVALID_NAME is the error CreateFile sets when the
4910 file name includes ?s, i.e. translation to ANSI failed. */
4911 case ERROR_INVALID_NAME:
4912 errno = ENOENT;
4913 break;
4914 case ERROR_TOO_MANY_OPEN_FILES:
4915 errno = ENFILE;
4916 break;
4917 case ERROR_ACCESS_DENIED:
4918 case ERROR_SHARING_VIOLATION:
4919 errno = EACCES;
4920 break;
4921 default:
4922 errno = EINVAL;
4923 break;
4924 }
16bb7578
GV		 4925 return -1;
4926 }
4927 return 0;
4928}
4929
7c80d5ec 4930\f
6dad7178
EZ		 4931/* Symlink-related functions. */
4932#ifndef SYMBOLIC_LINK_FLAG_DIRECTORY
4933#define SYMBOLIC_LINK_FLAG_DIRECTORY 0x1
4934#endif
4935
0f7bb05d 4936int
6dad7178 4937symlink (char const *filename, char const *linkname)
0f7bb05d 4938{
6dad7178
EZ		 4939 char linkfn[MAX_PATH], *tgtfn;
4940 DWORD flags = 0;
4941 int dir_access, filename_ends_in_slash;
806fed21 4942 int dbcs_p;
6dad7178
EZ		 4943
4944 /* Diagnostics follows Posix as much as possible. */
4945 if (filename == NULL || linkname == NULL)
4946 {
4947 errno = EFAULT;
4948 return -1;
4949 }
4950 if (!*filename)
4951 {
4952 errno = ENOENT;
4953 return -1;
4954 }
4955 if (strlen (filename) > MAX_PATH || strlen (linkname) > MAX_PATH)
4956 {
4957 errno = ENAMETOOLONG;
4958 return -1;
4959 }
4960
4961 strcpy (linkfn, map_w32_filename (linkname, NULL));
4962 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) == 0)
4963 {
4964 errno = EPERM;
4965 return -1;
4966 }
4967
806fed21
EZ		 4968 dbcs_p = max_filename_mbslen () > 1;
4969
6dad7178
EZ		 4970 /* Note: since empty FILENAME was already rejected, we can safely
4971 refer to FILENAME[1]. */
4972 if (!(IS_DIRECTORY_SEP (filename[0]) || IS_DEVICE_SEP (filename[1])))
4973 {
4974 /* Non-absolute FILENAME is understood as being relative to
4975 LINKNAME's directory. We need to prepend that directory to
14f20728 4976 FILENAME to get correct results from faccessat below, since
6dad7178
EZ		 4977 otherwise it will interpret FILENAME relative to the
4978 directory where the Emacs process runs. Note that
4979 make-symbolic-link always makes sure LINKNAME is a fully
4980 expanded file name. */
4981 char tem[MAX_PATH];
4982 char *p = linkfn + strlen (linkfn);
4983
806fed21
EZ		 4984 if (!dbcs_p)
4985 {
4986 while (p > linkfn && !IS_ANY_SEP (p[-1]))
4987 p--;
4988 }
4989 else
4990 {
4991 char *p1 = CharPrevExA (file_name_codepage, linkfn, p, 0);
4992
4993 while (p > linkfn && !IS_ANY_SEP (*p1))
4994 {
4995 p = p1;
4996 p1 = CharPrevExA (file_name_codepage, linkfn, p1, 0);
4997 }
4998 }
6dad7178
EZ		 4999 if (p > linkfn)
5000 strncpy (tem, linkfn, p - linkfn);
5001 tem[p - linkfn] = '\0';
5002 strcat (tem, filename);
14f20728 5003 dir_access = faccessat (AT_FDCWD, tem, D_OK, AT_EACCESS);
6dad7178
EZ		 5004 }
5005 else
14f20728 5006 dir_access = faccessat (AT_FDCWD, filename, D_OK, AT_EACCESS);
6dad7178
EZ		 5007
5008 /* Since Windows distinguishes between symlinks to directories and
8b2e00a3 5009 to files, we provide a kludgy feature: if FILENAME doesn't
6dad7178
EZ		 5010 exist, but ends in a slash, we create a symlink to directory. If
5011 FILENAME exists and is a directory, we always create a symlink to
5012 directory. */
806fed21
EZ		 5013 if (!dbcs_p)
5014 filename_ends_in_slash = IS_DIRECTORY_SEP (filename[strlen (filename) - 1]);
5015 else
5016 {
5017 const char *end = filename + strlen (filename);
5018 const char *n = CharPrevExA (file_name_codepage, filename, end, 0);
5019
5020 filename_ends_in_slash = IS_DIRECTORY_SEP (*n);
5021 }
6dad7178
EZ		 5022 if (dir_access == 0 || filename_ends_in_slash)
5023 flags = SYMBOLIC_LINK_FLAG_DIRECTORY;
5024
5025 tgtfn = (char *)map_w32_filename (filename, NULL);
5026 if (filename_ends_in_slash)
5027 tgtfn[strlen (tgtfn) - 1] = '\0';
5028
5029 errno = 0;
5030 if (!create_symbolic_link (linkfn, tgtfn, flags))
5031 {
5032 /* ENOSYS is set by create_symbolic_link, when it detects that
5033 the OS doesn't support the CreateSymbolicLink API. */
5034 if (errno != ENOSYS)
5035 {
5036 DWORD w32err = GetLastError ();
5037
5038 switch (w32err)
5039 {
5040 /* ERROR_SUCCESS is sometimes returned when LINKFN and
5041 TGTFN point to the same file name, go figure. */
5042 case ERROR_SUCCESS:
5043 case ERROR_FILE_EXISTS:
5044 errno = EEXIST;
5045 break;
5046 case ERROR_ACCESS_DENIED:
5047 errno = EACCES;
5048 break;
5049 case ERROR_FILE_NOT_FOUND:
5050 case ERROR_PATH_NOT_FOUND:
5051 case ERROR_BAD_NETPATH:
5052 case ERROR_INVALID_REPARSE_DATA:
5053 errno = ENOENT;
5054 break;
5055 case ERROR_DIRECTORY:
5056 errno = EISDIR;
5057 break;
5058 case ERROR_PRIVILEGE_NOT_HELD:
5059 case ERROR_NOT_ALL_ASSIGNED:
5060 errno = EPERM;
5061 break;
5062 case ERROR_DISK_FULL:
5063 errno = ENOSPC;
5064 break;
5065 default:
5066 errno = EINVAL;
5067 break;
5068 }
5069 }
5070 return -1;
5071 }
5072 return 0;
0f7bb05d
EZ		 5073}
5074
6dad7178
EZ		 5075/* A quick inexpensive test of whether FILENAME identifies a file that
5076 is a symlink. Returns non-zero if it is, zero otherwise. FILENAME
5077 must already be in the normalized form returned by
5078 map_w32_filename.
5079
5080 Note: for repeated operations on many files, it is best to test
5081 whether the underlying volume actually supports symlinks, by
5082 testing the FILE_SUPPORTS_REPARSE_POINTS bit in volume's flags, and
5083 avoid the call to this function if it doesn't. That's because the
8b2e00a3 5084 call to GetFileAttributes takes a non-negligible time, especially
6dad7178
EZ		 5085 on non-local or removable filesystems. See stat_worker for an
5086 example of how to do that. */
5087static int
5088is_symlink (const char *filename)
5089{
5090 DWORD attrs;
5091 WIN32_FIND_DATA wfd;
5092 HANDLE fh;
5093
5094 attrs = GetFileAttributes (filename);
5095 if (attrs == -1)
5096 {
5097 DWORD w32err = GetLastError ();
5098
5099 switch (w32err)
5100 {
5101 case ERROR_BAD_NETPATH: /* network share, can't be a symlink */
5102 break;
5103 case ERROR_ACCESS_DENIED:
5104 errno = EACCES;
5105 break;
5106 case ERROR_FILE_NOT_FOUND:
5107 case ERROR_PATH_NOT_FOUND:
5108 default:
5109 errno = ENOENT;
5110 break;
5111 }
5112 return 0;
5113 }
5114 if ((attrs & FILE_ATTRIBUTE_REPARSE_POINT) == 0)
5115 return 0;
5116 logon_network_drive (filename);
5117 fh = FindFirstFile (filename, &wfd);
5118 if (fh == INVALID_HANDLE_VALUE)
5119 return 0;
5120 FindClose (fh);
5121 return (wfd.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) != 0
5122 && (wfd.dwReserved0 & IO_REPARSE_TAG_SYMLINK) == IO_REPARSE_TAG_SYMLINK;
5123}
5124
5125/* If NAME identifies a symbolic link, copy into BUF the file name of
5126 the symlink's target. Copy at most BUF_SIZE bytes, and do NOT
5127 null-terminate the target name, even if it fits. Return the number
5128 of bytes copied, or -1 if NAME is not a symlink or any error was
5129 encountered while resolving it. The file name copied into BUF is
5130 encoded in the current ANSI codepage. */
0f7bb05d 5131ssize_t
6dad7178 5132readlink (const char *name, char *buf, size_t buf_size)
0f7bb05d 5133{
6dad7178
EZ		 5134 const char *path;
5135 TOKEN_PRIVILEGES privs;
5136 int restore_privs = 0;
5137 HANDLE sh;
5138 ssize_t retval;
5139
5140 if (name == NULL)
5141 {
5142 errno = EFAULT;
5143 return -1;
5144 }
5145 if (!*name)
5146 {
5147 errno = ENOENT;
5148 return -1;
5149 }
5150
5151 path = map_w32_filename (name, NULL);
5152
5153 if (strlen (path) > MAX_PATH)
5154 {
5155 errno = ENAMETOOLONG;
5156 return -1;
5157 }
5158
5159 errno = 0;
5160 if (is_windows_9x () == TRUE
5161 || (volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) == 0
5162 || !is_symlink (path))
5163 {
5164 if (!errno)
5165 errno = EINVAL; /* not a symlink */
5166 return -1;
5167 }
5168
5169 /* Done with simple tests, now we're in for some _real_ work. */
5170 if (enable_privilege (SE_BACKUP_NAME, TRUE, &privs))
5171 restore_privs = 1;
5172 /* Implementation note: From here and onward, don't return early,
5173 since that will fail to restore the original set of privileges of
5174 the calling thread. */
5175
5176 retval = -1; /* not too optimistic, are we? */
5177
5178 /* Note: In the next call to CreateFile, we use zero as the 2nd
5179 argument because, when the symlink is a hidden/system file,
5180 e.g. 'C:\Users\All Users', GENERIC_READ fails with
5181 ERROR_ACCESS_DENIED. Zero seems to work just fine, both for file
5182 and directory symlinks. */
5183 sh = CreateFile (path, 0, 0, NULL, OPEN_EXISTING,
5184 FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS,
5185 NULL);
5186 if (sh != INVALID_HANDLE_VALUE)
5187 {
5188 BYTE reparse_buf[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
5189 REPARSE_DATA_BUFFER *reparse_data = (REPARSE_DATA_BUFFER *)&reparse_buf[0];
5190 DWORD retbytes;
5191
5192 if (!DeviceIoControl (sh, FSCTL_GET_REPARSE_POINT, NULL, 0,
5193 reparse_buf, MAXIMUM_REPARSE_DATA_BUFFER_SIZE,
5194 &retbytes, NULL))
5195 errno = EIO;
5196 else if (reparse_data->ReparseTag != IO_REPARSE_TAG_SYMLINK)
5197 errno = EINVAL;
5198 else
5199 {
474d441e 5200 /* Copy the link target name, in wide characters, from
6dad7178
EZ		 5201 reparse_data, then convert it to multibyte encoding in
5202 the current locale's codepage. */
5203 WCHAR *lwname;
5204 BYTE lname[MAX_PATH];
5205 USHORT lname_len;
5206 USHORT lwname_len =
5207 reparse_data->SymbolicLinkReparseBuffer.PrintNameLength;
5208 WCHAR *lwname_src =
5209 reparse_data->SymbolicLinkReparseBuffer.PathBuffer
5210 + reparse_data->SymbolicLinkReparseBuffer.PrintNameOffset/sizeof(WCHAR);
26854e9c
EZ		 5211 /* This updates file_name_codepage which we need below. */
5212 int dbcs_p = max_filename_mbslen () > 1;
6dad7178
EZ		 5213
5214 /* According to MSDN, PrintNameLength does not include the
5215 terminating null character. */
5216 lwname = alloca ((lwname_len + 1) * sizeof(WCHAR));
5217 memcpy (lwname, lwname_src, lwname_len);
5218 lwname[lwname_len/sizeof(WCHAR)] = 0; /* null-terminate */
5219
26854e9c 5220 lname_len = WideCharToMultiByte (file_name_codepage, 0, lwname, -1,
6dad7178
EZ		 5221 lname, MAX_PATH, NULL, NULL);
5222 if (!lname_len)
5223 {
5224 /* WideCharToMultiByte failed. */
5225 DWORD w32err1 = GetLastError ();
5226
5227 switch (w32err1)
5228 {
5229 case ERROR_INSUFFICIENT_BUFFER:
5230 errno = ENAMETOOLONG;
5231 break;
5232 case ERROR_INVALID_PARAMETER:
5233 errno = EFAULT;
5234 break;
5235 case ERROR_NO_UNICODE_TRANSLATION:
5236 errno = ENOENT;
5237 break;
5238 default:
5239 errno = EINVAL;
5240 break;
5241 }
5242 }
5243 else
5244 {
5245 size_t size_to_copy = buf_size;
6ee4509a 5246 BYTE *p = lname, *p2;
6dad7178
EZ		 5247 BYTE *pend = p + lname_len;
5248
5249 /* Normalize like dostounix_filename does, but we don't
5250 want to assume that lname is null-terminated. */
6ee4509a 5251 if (dbcs_p)
26854e9c 5252 p2 = CharNextExA (file_name_codepage, p, 0);
6ee4509a
EZ		 5253 else
5254 p2 = p + 1;
5255 if (*p && *p2 == ':' && *p >= 'A' && *p <= 'Z')
5256 {
5257 *p += 'a' - 'A';
5258 p += 2;
5259 }
6dad7178
EZ		 5260 while (p <= pend)
5261 {
5262 if (*p == '\\')
5263 *p = '/';
6ee4509a
EZ		 5264 if (dbcs_p)
5265 {
26854e9c 5266 p = CharNextExA (file_name_codepage, p, 0);
6ee4509a
EZ		 5267 /* CharNextExA doesn't advance at null character. */
5268 if (!*p)
5269 break;
5270 }
5271 else
5272 ++p;
6dad7178
EZ		 5273 }
5274 /* Testing for null-terminated LNAME is paranoia:
5275 WideCharToMultiByte should always return a
5276 null-terminated string when its 4th argument is -1
5277 and its 3rd argument is null-terminated (which they
5278 are, see above). */
5279 if (lname[lname_len - 1] == '\0')
5280 lname_len--;
5281 if (lname_len <= buf_size)
5282 size_to_copy = lname_len;
5283 strncpy (buf, lname, size_to_copy);
5284 /* Success! */
5285 retval = size_to_copy;
5286 }
5287 }
5288 CloseHandle (sh);
5289 }
5290 else
5291 {
5292 /* CreateFile failed. */
5293 DWORD w32err2 = GetLastError ();
5294
5295 switch (w32err2)
5296 {
5297 case ERROR_FILE_NOT_FOUND:
5298 case ERROR_PATH_NOT_FOUND:
5299 errno = ENOENT;
5300 break;
5301 case ERROR_ACCESS_DENIED:
5302 case ERROR_TOO_MANY_OPEN_FILES:
5303 errno = EACCES;
5304 break;
5305 default:
5306 errno = EPERM;
5307 break;
5308 }
5309 }
5310 if (restore_privs)
5311 {
5312 restore_privilege (&privs);
5313 revert_to_self ();
5314 }
5315
5316 return retval;
0f7bb05d
EZ		 5317}
5318
8654f9d7
PE		 5319ssize_t
5320readlinkat (int fd, char const *name, char *buffer,
5321 size_t buffer_size)
5322{
5323 /* Rely on a hack: an open directory is modeled as file descriptor 0,
5324 as in fstatat. FIXME: Add proper support for readlinkat. */
5325 char fullname[MAX_PATH];
5326
5327 if (fd != AT_FDCWD)
5328 {
5329 if (_snprintf (fullname, sizeof fullname, "%s/%s", dir_pathname, name)
5330 < 0)
5331 {
5332 errno = ENAMETOOLONG;
5333 return -1;
5334 }
5335 name = fullname;
5336 }
5337
5338 return readlink (name, buffer, buffer_size);
5339}
5340
6dad7178
EZ		 5341/* If FILE is a symlink, return its target (stored in a static
5342 buffer); otherwise return FILE.
5343
5344 This function repeatedly resolves symlinks in the last component of
5345 a chain of symlink file names, as in foo -> bar -> baz -> ...,
5346 until it arrives at a file whose last component is not a symlink,
5347 or some error occurs. It returns the target of the last
5348 successfully resolved symlink in the chain. If it succeeds to
5349 resolve even a single symlink, the value returned is an absolute
5350 file name with backslashes (result of GetFullPathName). By
5351 contrast, if the original FILE is returned, it is unaltered.
5352
5353 Note: This function can set errno even if it succeeds.
5354
5355 Implementation note: we only resolve the last portion ("basename")
5356 of the argument FILE and of each following file in the chain,
5357 disregarding any possible symlinks in its leading directories.
5358 This is because Windows system calls and library functions
5359 transparently resolve symlinks in leading directories and return
5360 correct information, as long as the basename is not a symlink. */
5361static char *
5362chase_symlinks (const char *file)
5363{
5364 static char target[MAX_PATH];
5365 char link[MAX_PATH];
5366 ssize_t res, link_len;
5367 int loop_count = 0;
806fed21 5368 int dbcs_p;
6dad7178
EZ		 5369
5370 if (is_windows_9x () == TRUE || !is_symlink (file))
5371 return (char *)file;
5372
5373 if ((link_len = GetFullPathName (file, MAX_PATH, link, NULL)) == 0)
5374 return (char *)file;
5375
806fed21 5376 dbcs_p = max_filename_mbslen () > 1;
6dad7178
EZ		 5377 target[0] = '\0';
5378 do {
5379
5380 /* Remove trailing slashes, as we want to resolve the last
5381 non-trivial part of the link name. */
806fed21
EZ		 5382 if (!dbcs_p)
5383 {
5384 while (link_len > 3 && IS_DIRECTORY_SEP (link[link_len-1]))
5385 link[link_len--] = '\0';
5386 }
5387 else if (link_len > 3)
5388 {
5389 char *n = CharPrevExA (file_name_codepage, link, link + link_len, 0);
5390
5391 while (n >= link + 2 && IS_DIRECTORY_SEP (*n))
5392 {
5393 n[1] = '\0';
5394 n = CharPrevExA (file_name_codepage, link, n, 0);
5395 }
5396 }
6dad7178
EZ		 5397
5398 res = readlink (link, target, MAX_PATH);
5399 if (res > 0)
5400 {
5401 target[res] = '\0';
5402 if (!(IS_DEVICE_SEP (target[1])
25a20a3a 5403 || (IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]))))
6dad7178
EZ		 5404 {
5405 /* Target is relative. Append it to the directory part of
5406 the symlink, then copy the result back to target. */
5407 char *p = link + link_len;
5408
806fed21
EZ		 5409 if (!dbcs_p)
5410 {
5411 while (p > link && !IS_ANY_SEP (p[-1]))
5412 p--;
5413 }
5414 else
5415 {
5416 char *p1 = CharPrevExA (file_name_codepage, link, p, 0);
5417
5418 while (p > link && !IS_ANY_SEP (*p1))
5419 {
5420 p = p1;
5421 p1 = CharPrevExA (file_name_codepage, link, p1, 0);
5422 }
5423 }
6dad7178
EZ		 5424 strcpy (p, target);
5425 strcpy (target, link);
5426 }
5427 /* Resolve any "." and ".." to get a fully-qualified file name
5428 in link[] again. */
5429 link_len = GetFullPathName (target, MAX_PATH, link, NULL);
5430 }
5431 } while (res > 0 && link_len > 0 && ++loop_count <= 100);
5432
5433 if (loop_count > 100)
5434 errno = ELOOP;
5435
5436 if (target[0] == '\0') /* not a single call to readlink succeeded */
5437 return (char *)file;
5438 return target;
5439}
5440
66447e07
EZ		 5441\f
5442/* Posix ACL emulation. */
5443
5444int
5445acl_valid (acl_t acl)
5446{
5447 return is_valid_security_descriptor ((PSECURITY_DESCRIPTOR)acl) ? 0 : -1;
5448}
5449
5450char *
5451acl_to_text (acl_t acl, ssize_t *size)
5452{
5453 LPTSTR str_acl;
5454 SECURITY_INFORMATION flags =
5455 OWNER_SECURITY_INFORMATION |
5456 GROUP_SECURITY_INFORMATION |
5457 DACL_SECURITY_INFORMATION;
5458 char *retval = NULL;
b764d018 5459 ULONG local_size;
66447e07
EZ		 5460 int e = errno;
5461
5462 errno = 0;
5463
5464 if (convert_sd_to_sddl ((PSECURITY_DESCRIPTOR)acl, SDDL_REVISION_1, flags, &str_acl, &local_size))
5465 {
5466 errno = e;
5467 /* We don't want to mix heaps, so we duplicate the string in our
5468 heap and free the one allocated by the API. */
5469 retval = xstrdup (str_acl);
5470 if (size)
5471 *size = local_size;
5472 LocalFree (str_acl);
5473 }
5474 else if (errno != ENOTSUP)
5475 errno = EINVAL;
5476
5477 return retval;
5478}
5479
5480acl_t
5481acl_from_text (const char *acl_str)
5482{
5483 PSECURITY_DESCRIPTOR psd, retval = NULL;
5484 ULONG sd_size;
5485 int e = errno;
5486
5487 errno = 0;
5488
5489 if (convert_sddl_to_sd (acl_str, SDDL_REVISION_1, &psd, &sd_size))
5490 {
5491 errno = e;
5492 retval = xmalloc (sd_size);
5493 memcpy (retval, psd, sd_size);
5494 LocalFree (psd);
5495 }
5496 else if (errno != ENOTSUP)
5497 errno = EINVAL;
5498
5499 return retval;
5500}
5501
5502int
5503acl_free (void *ptr)
5504{
5505 xfree (ptr);
5506 return 0;
5507}
5508
5509acl_t
5510acl_get_file (const char *fname, acl_type_t type)
5511{
5512 PSECURITY_DESCRIPTOR psd = NULL;
474d441e 5513 const char *filename;
66447e07
EZ		 5514
5515 if (type == ACL_TYPE_ACCESS)
5516 {
5517 DWORD sd_len, err;
5518 SECURITY_INFORMATION si =
5519 OWNER_SECURITY_INFORMATION |
5520 GROUP_SECURITY_INFORMATION |
5521 DACL_SECURITY_INFORMATION ;
5522 int e = errno;
5523
474d441e
EZ		 5524 filename = map_w32_filename (fname, NULL);
5525 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
5526 fname = chase_symlinks (filename);
5527 else
5528 fname = filename;
5529
66447e07
EZ		 5530 errno = 0;
5531 if (!get_file_security (fname, si, psd, 0, &sd_len)
5532 && errno != ENOTSUP)
5533 {
5534 err = GetLastError ();
5535 if (err == ERROR_INSUFFICIENT_BUFFER)
5536 {
5537 psd = xmalloc (sd_len);
5538 if (!get_file_security (fname, si, psd, sd_len, &sd_len))
5539 {
5540 xfree (psd);
5541 errno = EIO;
5542 psd = NULL;
5543 }
5544 }
5545 else if (err == ERROR_FILE_NOT_FOUND
5546 || err == ERROR_PATH_NOT_FOUND)
5547 errno = ENOENT;
5548 else
5549 errno = EIO;
5550 }
5551 else if (!errno)
5552 errno = e;
5553 }
5554 else if (type != ACL_TYPE_DEFAULT)
5555 errno = EINVAL;
5556
5557 return psd;
5558}
5559
5560int
5561acl_set_file (const char *fname, acl_type_t type, acl_t acl)
5562{
5563 TOKEN_PRIVILEGES old1, old2;
5564 DWORD err;
66447e07
EZ		 5565 int st = 0, retval = -1;
5566 SECURITY_INFORMATION flags = 0;
5567 PSID psid;
5568 PACL pacl;
5569 BOOL dflt;
5570 BOOL dacl_present;
5571 int e;
474d441e 5572 const char *filename;
66447e07
EZ		 5573
5574 if (acl_valid (acl) != 0
5575 || (type != ACL_TYPE_DEFAULT && type != ACL_TYPE_ACCESS))
5576 {
5577 errno = EINVAL;
5578 return -1;
5579 }
5580
5581 if (type == ACL_TYPE_DEFAULT)
5582 {
5583 errno = ENOSYS;
5584 return -1;
5585 }
5586
474d441e
EZ		 5587 filename = map_w32_filename (fname, NULL);
5588 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
5589 fname = chase_symlinks (filename);
5590 else
5591 fname = filename;
5592
66447e07
EZ		 5593 if (get_security_descriptor_owner ((PSECURITY_DESCRIPTOR)acl, &psid, &dflt)
5594 && psid)
5595 flags |= OWNER_SECURITY_INFORMATION;
5596 if (get_security_descriptor_group ((PSECURITY_DESCRIPTOR)acl, &psid, &dflt)
5597 && psid)
5598 flags |= GROUP_SECURITY_INFORMATION;
5599 if (get_security_descriptor_dacl ((PSECURITY_DESCRIPTOR)acl, &dacl_present,
5600 &pacl, &dflt)
5601 && dacl_present)
5602 flags |= DACL_SECURITY_INFORMATION;
5603 if (!flags)
5604 return 0;
5605
5606 /* According to KB-245153, setting the owner will succeed if either:
5607 (1) the caller is the user who will be the new owner, and has the
5608 SE_TAKE_OWNERSHIP privilege, or
5609 (2) the caller has the SE_RESTORE privilege, in which case she can
5610 set any valid user or group as the owner
5611
5612 We request below both SE_TAKE_OWNERSHIP and SE_RESTORE
5613 privileges, and disregard any failures in obtaining them. If
5614 these privileges cannot be obtained, and do not already exist in
5615 the calling thread's security token, this function could fail
5616 with EPERM. */
5617 if (enable_privilege (SE_TAKE_OWNERSHIP_NAME, TRUE, &old1))
5618 st++;
5619 if (enable_privilege (SE_RESTORE_NAME, TRUE, &old2))
5620 st++;
5621
5622 e = errno;
5623 errno = 0;
84e5ed96 5624 if (!set_file_security ((char *)fname, flags, (PSECURITY_DESCRIPTOR)acl))
474d441e 5625 {
84e5ed96 5626 err = GetLastError ();
40ff07a5 5627
84e5ed96
EZ		 5628 if (errno == ENOTSUP)
5629 ;
5630 else if (err == ERROR_INVALID_OWNER
5631 || err == ERROR_NOT_ALL_ASSIGNED
5632 || err == ERROR_ACCESS_DENIED)
40ff07a5 5633 {
84e5ed96
EZ		 5634 /* Maybe the requested ACL and the one the file already has
5635 are identical, in which case we can silently ignore the
5636 failure. (And no, Windows doesn't.) */
5637 acl_t current_acl = acl_get_file (fname, ACL_TYPE_ACCESS);
40ff07a5 5638
84e5ed96
EZ		 5639 errno = EPERM;
5640 if (current_acl)
40ff07a5 5641 {
84e5ed96
EZ		 5642 char *acl_from = acl_to_text (current_acl, NULL);
5643 char *acl_to = acl_to_text (acl, NULL);
5644
5645 if (acl_from && acl_to && xstrcasecmp (acl_from, acl_to) == 0)
5646 {
5647 retval = 0;
5648 errno = e;
5649 }
5650 if (acl_from)
5651 acl_free (acl_from);
5652 if (acl_to)
5653 acl_free (acl_to);
5654 acl_free (current_acl);
40ff07a5 5655 }
40ff07a5 5656 }
84e5ed96
EZ		 5657 else if (err == ERROR_FILE_NOT_FOUND || err == ERROR_PATH_NOT_FOUND)
5658 errno = ENOENT;
5659 else
5660 errno = EACCES;
5661 }
5662 else
5663 {
5664 retval = 0;
5665 errno = e;
5666 }
5667
5668 if (st)
5669 {
5670 if (st >= 2)
5671 restore_privilege (&old2);
5672 restore_privilege (&old1);
5673 revert_to_self ();
40ff07a5 5674 }
66447e07
EZ		 5675
5676 return retval;
5677}
5678
5679\f
6dad7178
EZ		 5680/* MS-Windows version of careadlinkat (cf. ../lib/careadlinkat.c). We
5681 have a fixed max size for file names, so we don't need the kind of
5682 alloc/malloc/realloc dance the gnulib version does. We also don't
5683 support FD-relative symlinks. */
973f782d
EZ		 5684char *
5685careadlinkat (int fd, char const *filename,
5686 char *buffer, size_t buffer_size,
5687 struct allocator const *alloc,
5688 ssize_t (*preadlinkat) (int, char const *, char *, size_t))
5689{
6dad7178
EZ		 5690 char linkname[MAX_PATH];
5691 ssize_t link_size;
5692
6dad7178
EZ		 5693 link_size = preadlinkat (fd, filename, linkname, sizeof(linkname));
5694
5695 if (link_size > 0)
5696 {
5697 char *retval = buffer;
5698
5699 linkname[link_size++] = '\0';
5700 if (link_size > buffer_size)
5701 retval = (char *)(alloc ? alloc->allocate : xmalloc) (link_size);
5702 if (retval)
5703 memcpy (retval, linkname, link_size);
5704
5705 return retval;
5706 }
973f782d
EZ		 5707 return NULL;
5708}
5709
0f7bb05d 5710\f
7c80d5ec
EZ		 5711/* Support for browsing other processes and their attributes. See
5712 process.c for the Lisp bindings. */
5713
5714/* Helper wrapper functions. */
5715
bedf4aab
JB		 5716static HANDLE WINAPI
5717create_toolhelp32_snapshot (DWORD Flags, DWORD Ignored)
7c80d5ec
EZ		 5718{
5719 static CreateToolhelp32Snapshot_Proc s_pfn_Create_Toolhelp32_Snapshot = NULL;
5720
5721 if (g_b_init_create_toolhelp32_snapshot == 0)
5722 {
5723 g_b_init_create_toolhelp32_snapshot = 1;
5724 s_pfn_Create_Toolhelp32_Snapshot = (CreateToolhelp32Snapshot_Proc)
5725 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5726 "CreateToolhelp32Snapshot");
5727 }
5728 if (s_pfn_Create_Toolhelp32_Snapshot == NULL)
5729 {
5730 return INVALID_HANDLE_VALUE;
5731 }
5732 return (s_pfn_Create_Toolhelp32_Snapshot (Flags, Ignored));
5733}
5734
bedf4aab
JB		 5735static BOOL WINAPI
5736process32_first (HANDLE hSnapshot, LPPROCESSENTRY32 lppe)
7c80d5ec
EZ		 5737{
5738 static Process32First_Proc s_pfn_Process32_First = NULL;
5739
5740 if (g_b_init_process32_first == 0)
5741 {
5742 g_b_init_process32_first = 1;
5743 s_pfn_Process32_First = (Process32First_Proc)
5744 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5745 "Process32First");
5746 }
5747 if (s_pfn_Process32_First == NULL)
5748 {
5749 return FALSE;
5750 }
5751 return (s_pfn_Process32_First (hSnapshot, lppe));
5752}
5753
bedf4aab
JB		 5754static BOOL WINAPI
5755process32_next (HANDLE hSnapshot, LPPROCESSENTRY32 lppe)
7c80d5ec
EZ		 5756{
5757 static Process32Next_Proc s_pfn_Process32_Next = NULL;
5758
5759 if (g_b_init_process32_next == 0)
5760 {
5761 g_b_init_process32_next = 1;
5762 s_pfn_Process32_Next = (Process32Next_Proc)
5763 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5764 "Process32Next");
5765 }
5766 if (s_pfn_Process32_Next == NULL)
5767 {
5768 return FALSE;
5769 }
5770 return (s_pfn_Process32_Next (hSnapshot, lppe));
5771}
5772
bedf4aab
JB		 5773static BOOL WINAPI
5774open_thread_token (HANDLE ThreadHandle,
5775 DWORD DesiredAccess,
5776 BOOL OpenAsSelf,
5777 PHANDLE TokenHandle)
7c80d5ec
EZ		 5778{
5779 static OpenThreadToken_Proc s_pfn_Open_Thread_Token = NULL;
5780 HMODULE hm_advapi32 = NULL;
5781 if (is_windows_9x () == TRUE)
5782 {
5783 SetLastError (ERROR_NOT_SUPPORTED);
5784 return FALSE;
5785 }
5786 if (g_b_init_open_thread_token == 0)
5787 {
5788 g_b_init_open_thread_token = 1;
5789 hm_advapi32 = LoadLibrary ("Advapi32.dll");
5790 s_pfn_Open_Thread_Token =
5791 (OpenThreadToken_Proc) GetProcAddress (hm_advapi32, "OpenThreadToken");
5792 }
5793 if (s_pfn_Open_Thread_Token == NULL)
5794 {
5795 SetLastError (ERROR_NOT_SUPPORTED);
5796 return FALSE;
5797 }
5798 return (
5799 s_pfn_Open_Thread_Token (
5800 ThreadHandle,
5801 DesiredAccess,
5802 OpenAsSelf,
5803 TokenHandle)
5804 );
5805}
5806
bedf4aab
JB		 5807static BOOL WINAPI
5808impersonate_self (SECURITY_IMPERSONATION_LEVEL ImpersonationLevel)
7c80d5ec
EZ		 5809{
5810 static ImpersonateSelf_Proc s_pfn_Impersonate_Self = NULL;
5811 HMODULE hm_advapi32 = NULL;
5812 if (is_windows_9x () == TRUE)
5813 {
5814 return FALSE;
5815 }
5816 if (g_b_init_impersonate_self == 0)
5817 {
5818 g_b_init_impersonate_self = 1;
5819 hm_advapi32 = LoadLibrary ("Advapi32.dll");
5820 s_pfn_Impersonate_Self =
5821 (ImpersonateSelf_Proc) GetProcAddress (hm_advapi32, "ImpersonateSelf");
5822 }
5823 if (s_pfn_Impersonate_Self == NULL)
5824 {
5825 return FALSE;
5826 }
5827 return s_pfn_Impersonate_Self (ImpersonationLevel);
5828}
5829
bedf4aab
JB		 5830static BOOL WINAPI
5831revert_to_self (void)
7c80d5ec
EZ		 5832{
5833 static RevertToSelf_Proc s_pfn_Revert_To_Self = NULL;
5834 HMODULE hm_advapi32 = NULL;
5835 if (is_windows_9x () == TRUE)
5836 {
5837 return FALSE;
5838 }
5839 if (g_b_init_revert_to_self == 0)
5840 {
5841 g_b_init_revert_to_self = 1;
5842 hm_advapi32 = LoadLibrary ("Advapi32.dll");
5843 s_pfn_Revert_To_Self =
5844 (RevertToSelf_Proc) GetProcAddress (hm_advapi32, "RevertToSelf");
5845 }
5846 if (s_pfn_Revert_To_Self == NULL)
5847 {
5848 return FALSE;
5849 }
5850 return s_pfn_Revert_To_Self ();
5851}
5852
bedf4aab
JB		 5853static BOOL WINAPI
5854get_process_memory_info (HANDLE h_proc,
5855 PPROCESS_MEMORY_COUNTERS mem_counters,
5856 DWORD bufsize)
7c80d5ec
EZ		 5857{
5858 static GetProcessMemoryInfo_Proc s_pfn_Get_Process_Memory_Info = NULL;
5859 HMODULE hm_psapi = NULL;
5860 if (is_windows_9x () == TRUE)
5861 {
5862 return FALSE;
5863 }
5864 if (g_b_init_get_process_memory_info == 0)
5865 {
5866 g_b_init_get_process_memory_info = 1;
5867 hm_psapi = LoadLibrary ("Psapi.dll");
5868 if (hm_psapi)
5869 s_pfn_Get_Process_Memory_Info = (GetProcessMemoryInfo_Proc)
5870 GetProcAddress (hm_psapi, "GetProcessMemoryInfo");
5871 }
5872 if (s_pfn_Get_Process_Memory_Info == NULL)
5873 {
5874 return FALSE;
5875 }
5876 return s_pfn_Get_Process_Memory_Info (h_proc, mem_counters, bufsize);
5877}
5878
bedf4aab
JB		 5879static BOOL WINAPI
5880get_process_working_set_size (HANDLE h_proc,
cb576b5c
FP		 5881 PSIZE_T minrss,
5882 PSIZE_T maxrss)
7c80d5ec
EZ		 5883{
5884 static GetProcessWorkingSetSize_Proc
5885 s_pfn_Get_Process_Working_Set_Size = NULL;
5886
5887 if (is_windows_9x () == TRUE)
5888 {
5889 return FALSE;
5890 }
5891 if (g_b_init_get_process_working_set_size == 0)
5892 {
5893 g_b_init_get_process_working_set_size = 1;
5894 s_pfn_Get_Process_Working_Set_Size = (GetProcessWorkingSetSize_Proc)
5895 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5896 "GetProcessWorkingSetSize");
5897 }
5898 if (s_pfn_Get_Process_Working_Set_Size == NULL)
5899 {
5900 return FALSE;
5901 }
5902 return s_pfn_Get_Process_Working_Set_Size (h_proc, minrss, maxrss);
5903}
5904
bedf4aab
JB		 5905static BOOL WINAPI
5906global_memory_status (MEMORYSTATUS *buf)
7c80d5ec
EZ		 5907{
5908 static GlobalMemoryStatus_Proc s_pfn_Global_Memory_Status = NULL;
5909
5910 if (is_windows_9x () == TRUE)
5911 {
5912 return FALSE;
5913 }
5914 if (g_b_init_global_memory_status == 0)
5915 {
5916 g_b_init_global_memory_status = 1;
5917 s_pfn_Global_Memory_Status = (GlobalMemoryStatus_Proc)
5918 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5919 "GlobalMemoryStatus");
5920 }
5921 if (s_pfn_Global_Memory_Status == NULL)
5922 {
5923 return FALSE;
5924 }
5925 return s_pfn_Global_Memory_Status (buf);
5926}
5927
bedf4aab
JB		 5928static BOOL WINAPI
5929global_memory_status_ex (MEMORY_STATUS_EX *buf)
7c80d5ec
EZ		 5930{
5931 static GlobalMemoryStatusEx_Proc s_pfn_Global_Memory_Status_Ex = NULL;
5932
5933 if (is_windows_9x () == TRUE)
5934 {
5935 return FALSE;
5936 }
5937 if (g_b_init_global_memory_status_ex == 0)
5938 {
5939 g_b_init_global_memory_status_ex = 1;
5940 s_pfn_Global_Memory_Status_Ex = (GlobalMemoryStatusEx_Proc)
5941 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5942 "GlobalMemoryStatusEx");
5943 }
5944 if (s_pfn_Global_Memory_Status_Ex == NULL)
5945 {
5946 return FALSE;
5947 }
5948 return s_pfn_Global_Memory_Status_Ex (buf);
5949}
5950
5951Lisp_Object
b56ceb92 5952list_system_processes (void)
7c80d5ec
EZ		 5953{
5954 struct gcpro gcpro1;
5955 Lisp_Object proclist = Qnil;
5956 HANDLE h_snapshot;
5957
5958 h_snapshot = create_toolhelp32_snapshot (TH32CS_SNAPPROCESS, 0);
5959
5960 if (h_snapshot != INVALID_HANDLE_VALUE)
5961 {
5962 PROCESSENTRY32 proc_entry;
5963 DWORD proc_id;
5964 BOOL res;
5965
5966 GCPRO1 (proclist);
5967
5968 proc_entry.dwSize = sizeof (PROCESSENTRY32);
5969 for (res = process32_first (h_snapshot, &proc_entry); res;
5970 res = process32_next (h_snapshot, &proc_entry))
5971 {
5972 proc_id = proc_entry.th32ProcessID;
5973 proclist = Fcons (make_fixnum_or_float (proc_id), proclist);
5974 }
5975
5976 CloseHandle (h_snapshot);
5977 UNGCPRO;
5978 proclist = Fnreverse (proclist);
5979 }
5980
5981 return proclist;
5982}
5983
5984static int
5985enable_privilege (LPCTSTR priv_name, BOOL enable_p, TOKEN_PRIVILEGES *old_priv)
5986{
5987 TOKEN_PRIVILEGES priv;
5988 DWORD priv_size = sizeof (priv);
5989 DWORD opriv_size = sizeof (*old_priv);
5990 HANDLE h_token = NULL;
5991 HANDLE h_thread = GetCurrentThread ();
5992 int ret_val = 0;
5993 BOOL res;
5994
5995 res = open_thread_token (h_thread,
5996 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
5997 FALSE, &h_token);
5998 if (!res && GetLastError () == ERROR_NO_TOKEN)
5999 {
6000 if (impersonate_self (SecurityImpersonation))
6001 res = open_thread_token (h_thread,
6002 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
6003 FALSE, &h_token);
6004 }
6005 if (res)
6006 {
6007 priv.PrivilegeCount = 1;
6008 priv.Privileges[0].Attributes = enable_p ? SE_PRIVILEGE_ENABLED : 0;
6009 LookupPrivilegeValue (NULL, priv_name, &priv.Privileges[0].Luid);
6010 if (AdjustTokenPrivileges (h_token, FALSE, &priv, priv_size,
6011 old_priv, &opriv_size)
6012 && GetLastError () != ERROR_NOT_ALL_ASSIGNED)
6013 ret_val = 1;
6014 }
6015 if (h_token)
6016 CloseHandle (h_token);
6017
6018 return ret_val;
6019}
6020
6021static int
6022restore_privilege (TOKEN_PRIVILEGES *priv)
6023{
6024 DWORD priv_size = sizeof (*priv);
6025 HANDLE h_token = NULL;
6026 int ret_val = 0;
6027
6028 if (open_thread_token (GetCurrentThread (),
6029 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
6030 FALSE, &h_token))
6031 {
6032 if (AdjustTokenPrivileges (h_token, FALSE, priv, priv_size, NULL, NULL)
6033 && GetLastError () != ERROR_NOT_ALL_ASSIGNED)
6034 ret_val = 1;
6035 }
6036 if (h_token)
6037 CloseHandle (h_token);
6038
6039 return ret_val;
6040}
6041
ca300656 6042static Lisp_Object
d35af63c 6043ltime (ULONGLONG time_100ns)
7c80d5ec 6044{
d35af63c
PE		 6045 ULONGLONG time_sec = time_100ns / 10000000;
6046 int subsec = time_100ns % 10000000;
3de717bd
DA		 6047 return list4i (time_sec >> 16, time_sec & 0xffff,
6048 subsec / 10, subsec % 10 * 100000);
7c80d5ec
EZ		 6049}
6050
d35af63c 6051#define U64_TO_LISP_TIME(time) ltime (time)
5da9424d 6052
7c80d5ec 6053static int
b56ceb92
JB		 6054process_times (HANDLE h_proc, Lisp_Object *ctime, Lisp_Object *etime,
6055 Lisp_Object *stime, Lisp_Object *utime, Lisp_Object *ttime,
6056 double *pcpu)
7c80d5ec
EZ		 6057{
6058 FILETIME ft_creation, ft_exit, ft_kernel, ft_user, ft_current;
5da9424d 6059 ULONGLONG tem1, tem2, tem3, tem;
7c80d5ec
EZ		 6060
6061 if (!h_proc
6062 || !get_process_times_fn
ed3751c8
JB		 6063 || !(*get_process_times_fn) (h_proc, &ft_creation, &ft_exit,
6064 &ft_kernel, &ft_user))
7c80d5ec
EZ		 6065 return 0;
6066
6067 GetSystemTimeAsFileTime (&ft_current);
6068
5da9424d 6069 FILETIME_TO_U64 (tem1, ft_kernel);
5da9424d
JB		 6070 *stime = U64_TO_LISP_TIME (tem1);
6071
6072 FILETIME_TO_U64 (tem2, ft_user);
5da9424d
JB		 6073 *utime = U64_TO_LISP_TIME (tem2);
6074
6075 tem3 = tem1 + tem2;
6076 *ttime = U64_TO_LISP_TIME (tem3);
6077
6078 FILETIME_TO_U64 (tem, ft_creation);
3af03101
EZ		 6079 /* Process no 4 (System) returns zero creation time. */
6080 if (tem)
d35af63c 6081 tem -= utc_base;
5da9424d
JB		 6082 *ctime = U64_TO_LISP_TIME (tem);
6083
3af03101 6084 if (tem)
5da9424d
JB		 6085 {
6086 FILETIME_TO_U64 (tem3, ft_current);
d35af63c 6087 tem = (tem3 - utc_base) - tem;
5da9424d
JB		 6088 }
6089 *etime = U64_TO_LISP_TIME (tem);
7c80d5ec 6090
3af03101
EZ		 6091 if (tem)
6092 {
6093 *pcpu = 100.0 * (tem1 + tem2) / tem;
6094 if (*pcpu > 100)
6095 *pcpu = 100.0;
6096 }
6097 else
6098 *pcpu = 0;
6099
6100 return 1;
7c80d5ec
EZ		 6101}
6102
6103Lisp_Object
b56ceb92 6104system_process_attributes (Lisp_Object pid)
7c80d5ec
EZ		 6105{
6106 struct gcpro gcpro1, gcpro2, gcpro3;
6107 Lisp_Object attrs = Qnil;
6108 Lisp_Object cmd_str, decoded_cmd, tem;
6109 HANDLE h_snapshot, h_proc;
6110 DWORD proc_id;
754a2d13 6111 int found_proc = 0;
7c80d5ec 6112 char uname[UNLEN+1], gname[GNLEN+1], domain[1025];
32cef06e 6113 DWORD ulength = sizeof (uname), dlength = sizeof (domain), needed;
7c80d5ec
EZ		 6114 DWORD glength = sizeof (gname);
6115 HANDLE token = NULL;
6116 SID_NAME_USE user_type;
32cef06e
EZ		 6117 unsigned char *buf = NULL;
6118 DWORD blen = 0;
7c80d5ec
EZ		 6119 TOKEN_USER user_token;
6120 TOKEN_PRIMARY_GROUP group_token;
22749e9a
EZ		 6121 unsigned euid;
6122 unsigned egid;
7c80d5ec
EZ		 6123 PROCESS_MEMORY_COUNTERS mem;
6124 PROCESS_MEMORY_COUNTERS_EX mem_ex;
cb576b5c 6125 SIZE_T minrss, maxrss;
7c80d5ec 6126 MEMORYSTATUS memst;
b8526f6e 6127 MEMORY_STATUS_EX memstex;
7c80d5ec 6128 double totphys = 0.0;
031da700 6129 Lisp_Object ctime, stime, utime, etime, ttime;
7c80d5ec 6130 double pcpu;
32cef06e 6131 BOOL result = FALSE;
7c80d5ec
EZ		 6132
6133 CHECK_NUMBER_OR_FLOAT (pid);
6134 proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid);
6135
6136 h_snapshot = create_toolhelp32_snapshot (TH32CS_SNAPPROCESS, 0);
6137
6138 GCPRO3 (attrs, decoded_cmd, tem);
6139
6140 if (h_snapshot != INVALID_HANDLE_VALUE)
6141 {
6142 PROCESSENTRY32 pe;
6143 BOOL res;
6144
6145 pe.dwSize = sizeof (PROCESSENTRY32);
6146 for (res = process32_first (h_snapshot, &pe); res;
6147 res = process32_next (h_snapshot, &pe))
6148 {
6149 if (proc_id == pe.th32ProcessID)
6150 {
6151 if (proc_id == 0)
6152 decoded_cmd = build_string ("Idle");
6153 else
6154 {
6155 /* Decode the command name from locale-specific
6156 encoding. */
309f24d1
DA		 6157 cmd_str = build_unibyte_string (pe.szExeFile);
6158
7c80d5ec
EZ		 6159 decoded_cmd =
6160 code_convert_string_norecord (cmd_str,
6161 Vlocale_coding_system, 0);
6162 }
6163 attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
6164 attrs = Fcons (Fcons (Qppid,
6165 make_fixnum_or_float (pe.th32ParentProcessID)),
6166 attrs);
6167 attrs = Fcons (Fcons (Qpri, make_number (pe.pcPriClassBase)),
6168 attrs);
6169 attrs = Fcons (Fcons (Qthcount,
6170 make_fixnum_or_float (pe.cntThreads)),
6171 attrs);
754a2d13 6172 found_proc = 1;
7c80d5ec
EZ		 6173 break;
6174 }
6175 }
6176
6177 CloseHandle (h_snapshot);
6178 }
6179
754a2d13
EZ		 6180 if (!found_proc)
6181 {
6182 UNGCPRO;
6183 return Qnil;
6184 }
6185
7c80d5ec
EZ		 6186 h_proc = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
6187 FALSE, proc_id);
6188 /* If we were denied a handle to the process, try again after
6189 enabling the SeDebugPrivilege in our process. */
6190 if (!h_proc)
6191 {
6192 TOKEN_PRIVILEGES priv_current;
6193
6194 if (enable_privilege (SE_DEBUG_NAME, TRUE, &priv_current))
6195 {
6196 h_proc = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
6197 FALSE, proc_id);
6198 restore_privilege (&priv_current);
6199 revert_to_self ();
6200 }
6201 }
32cef06e 6202 if (h_proc)
7c80d5ec 6203 {
32cef06e
EZ		 6204 result = open_process_token (h_proc, TOKEN_QUERY, &token);
6205 if (result)
f8b35b24 6206 {
32cef06e
EZ		 6207 result = get_token_information (token, TokenUser, NULL, 0, &blen);
6208 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
6209 {
6210 buf = xmalloc (blen);
6211 result = get_token_information (token, TokenUser,
6212 (LPVOID)buf, blen, &needed);
6213 if (result)
6214 {
6215 memcpy (&user_token, buf, sizeof (user_token));
6216 if (!w32_cached_id (user_token.User.Sid, &euid, uname))
6217 {
6218 euid = get_rid (user_token.User.Sid);
6219 result = lookup_account_sid (NULL, user_token.User.Sid,
6220 uname, &ulength,
6221 domain, &dlength,
6222 &user_type);
6223 if (result)
6224 w32_add_to_cache (user_token.User.Sid, euid, uname);
6225 else
6226 {
6227 strcpy (uname, "unknown");
6228 result = TRUE;
6229 }
6230 }
6231 ulength = strlen (uname);
6232 }
6233 }
7c80d5ec 6234 }
32cef06e 6235 if (result)
7c80d5ec 6236 {
32cef06e
EZ		 6237 /* Determine a reasonable euid and gid values. */
6238 if (xstrcasecmp ("administrator", uname) == 0)
7c80d5ec 6239 {
32cef06e
EZ		 6240 euid = 500; /* well-known Administrator uid */
6241 egid = 513; /* well-known None gid */
6242 }
6243 else
6244 {
6245 /* Get group id and name. */
6246 result = get_token_information (token, TokenPrimaryGroup,
6247 (LPVOID)buf, blen, &needed);
6248 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
f8b35b24 6249 {
32cef06e
EZ		 6250 buf = xrealloc (buf, blen = needed);
6251 result = get_token_information (token, TokenPrimaryGroup,
6252 (LPVOID)buf, blen, &needed);
6253 }
6254 if (result)
6255 {
6256 memcpy (&group_token, buf, sizeof (group_token));
6257 if (!w32_cached_id (group_token.PrimaryGroup, &egid, gname))
6258 {
6259 egid = get_rid (group_token.PrimaryGroup);
6260 dlength = sizeof (domain);
6261 result =
6262 lookup_account_sid (NULL, group_token.PrimaryGroup,
6263 gname, &glength, NULL, &dlength,
6264 &user_type);
6265 if (result)
6266 w32_add_to_cache (group_token.PrimaryGroup,
6267 egid, gname);
6268 else
6269 {
6270 strcpy (gname, "None");
6271 result = TRUE;
6272 }
6273 }
6274 glength = strlen (gname);
f8b35b24 6275 }
7c80d5ec 6276 }
7c80d5ec 6277 }
5f445726 6278 xfree (buf);
7c80d5ec 6279 }
32cef06e 6280 if (!result)
7c80d5ec 6281 {
32cef06e
EZ		 6282 if (!is_windows_9x ())
6283 {
6284 /* We couldn't open the process token, presumably because of
6285 insufficient access rights. Assume this process is run
6286 by the system. */
6287 strcpy (uname, "SYSTEM");
6288 strcpy (gname, "None");
6289 euid = 18; /* SYSTEM */
6290 egid = 513; /* None */
6291 glength = strlen (gname);
6292 ulength = strlen (uname);
6293 }
6294 /* If we are running under Windows 9X, where security calls are
6295 not supported, we assume all processes are run by the current
6296 user. */
6297 else if (GetUserName (uname, &ulength))
6298 {
6299 if (xstrcasecmp ("administrator", uname) == 0)
6300 euid = 0;
6301 else
6302 euid = 123;
6303 egid = euid;
6304 strcpy (gname, "None");
6305 glength = strlen (gname);
6306 ulength = strlen (uname);
6307 }
7c80d5ec 6308 else
32cef06e
EZ		 6309 {
6310 euid = 123;
6311 egid = 123;
6312 strcpy (uname, "administrator");
6313 ulength = strlen (uname);
6314 strcpy (gname, "None");
6315 glength = strlen (gname);
6316 }
6317 if (token)
6318 CloseHandle (token);
7c80d5ec 6319 }
7c80d5ec
EZ		 6320
6321 attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (euid)), attrs);
6322 tem = make_unibyte_string (uname, ulength);
6323 attrs = Fcons (Fcons (Quser,
6324 code_convert_string_norecord (tem, Vlocale_coding_system, 0)),
6325 attrs);
6326 attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (egid)), attrs);
6327 tem = make_unibyte_string (gname, glength);
6328 attrs = Fcons (Fcons (Qgroup,
6329 code_convert_string_norecord (tem, Vlocale_coding_system, 0)),
6330 attrs);
6331
6332 if (global_memory_status_ex (&memstex))
235661f6 6333#if __GNUC__ || (defined (_MSC_VER) && _MSC_VER >= 1300)
7c80d5ec 6334 totphys = memstex.ullTotalPhys / 1024.0;
235661f6
EZ		 6335#else
6336 /* Visual Studio 6 cannot convert an unsigned __int64 type to
6337 double, so we need to do this for it... */
6338 {
6339 DWORD tot_hi = memstex.ullTotalPhys >> 32;
6340 DWORD tot_md = (memstex.ullTotalPhys & 0x00000000ffffffff) >> 10;
6341 DWORD tot_lo = memstex.ullTotalPhys % 1024;
6342
6343 totphys = tot_hi * 4194304.0 + tot_md + tot_lo / 1024.0;
6344 }
6345#endif /* __GNUC__ || _MSC_VER >= 1300 */
7c80d5ec
EZ		 6346 else if (global_memory_status (&memst))
6347 totphys = memst.dwTotalPhys / 1024.0;
6348
6349 if (h_proc
6350 && get_process_memory_info (h_proc, (PROCESS_MEMORY_COUNTERS *)&mem_ex,
6351 sizeof (mem_ex)))
6352 {
cb576b5c 6353 SIZE_T rss = mem_ex.WorkingSetSize / 1024;
7c80d5ec
EZ		 6354
6355 attrs = Fcons (Fcons (Qmajflt,
6356 make_fixnum_or_float (mem_ex.PageFaultCount)),
6357 attrs);
6358 attrs = Fcons (Fcons (Qvsize,
6359 make_fixnum_or_float (mem_ex.PrivateUsage / 1024)),
6360 attrs);
6361 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (rss)), attrs);
6362 if (totphys)
6363 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
6364 }
6365 else if (h_proc
6366 && get_process_memory_info (h_proc, &mem, sizeof (mem)))
6367 {
cb576b5c 6368 SIZE_T rss = mem_ex.WorkingSetSize / 1024;
7c80d5ec
EZ		 6369
6370 attrs = Fcons (Fcons (Qmajflt,
6371 make_fixnum_or_float (mem.PageFaultCount)),
6372 attrs);
6373 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (rss)), attrs);
6374 if (totphys)
6375 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
6376 }
6377 else if (h_proc
6378 && get_process_working_set_size (h_proc, &minrss, &maxrss))
6379 {
6380 DWORD rss = maxrss / 1024;
6381
6382 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (maxrss / 1024)), attrs);
6383 if (totphys)
6384 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
6385 }
6386
031da700 6387 if (process_times (h_proc, &ctime, &etime, &stime, &utime, &ttime, &pcpu))
7c80d5ec
EZ		 6388 {
6389 attrs = Fcons (Fcons (Qutime, utime), attrs);
6390 attrs = Fcons (Fcons (Qstime, stime), attrs);
031da700 6391 attrs = Fcons (Fcons (Qtime, ttime), attrs);
7c80d5ec
EZ		 6392 attrs = Fcons (Fcons (Qstart, ctime), attrs);
6393 attrs = Fcons (Fcons (Qetime, etime), attrs);
6394 attrs = Fcons (Fcons (Qpcpu, make_float (pcpu)), attrs);
6395 }
6396
6397 /* FIXME: Retrieve command line by walking the PEB of the process. */
6398
6399 if (h_proc)
6400 CloseHandle (h_proc);
6401 UNGCPRO;
6402 return attrs;
6403}
6404
6405\f
480b0c5b
GV		 6406/* Wrappers for winsock functions to map between our file descriptors
6407 and winsock's handles; also set h_errno for convenience.
6408
6409 To allow Emacs to run on systems which don't have winsock support
6410 installed, we dynamically link to winsock on startup if present, and
6411 otherwise provide the minimum necessary functionality
6412 (eg. gethostname). */
6413
6414/* function pointers for relevant socket functions */
6415int (PASCAL *pfn_WSAStartup) (WORD wVersionRequired, LPWSADATA lpWSAData);
6416void (PASCAL *pfn_WSASetLastError) (int iError);
6417int (PASCAL *pfn_WSAGetLastError) (void);
26fb7bc4 6418int (PASCAL *pfn_WSAEventSelect) (SOCKET s, HANDLE hEventObject, long lNetworkEvents);
64570b36
KS		 6419HANDLE (PASCAL *pfn_WSACreateEvent) (void);
6420int (PASCAL *pfn_WSACloseEvent) (HANDLE hEvent);
480b0c5b
GV		 6421int (PASCAL *pfn_socket) (int af, int type, int protocol);
6422int (PASCAL *pfn_bind) (SOCKET s, const struct sockaddr *addr, int namelen);
6423int (PASCAL *pfn_connect) (SOCKET s, const struct sockaddr *addr, int namelen);
6424int (PASCAL *pfn_ioctlsocket) (SOCKET s, long cmd, u_long *argp);
6425int (PASCAL *pfn_recv) (SOCKET s, char * buf, int len, int flags);
6426int (PASCAL *pfn_send) (SOCKET s, const char * buf, int len, int flags);
6427int (PASCAL *pfn_closesocket) (SOCKET s);
6428int (PASCAL *pfn_shutdown) (SOCKET s, int how);
6429int (PASCAL *pfn_WSACleanup) (void);
6430
6431u_short (PASCAL *pfn_htons) (u_short hostshort);
6432u_short (PASCAL *pfn_ntohs) (u_short netshort);
6433unsigned long (PASCAL *pfn_inet_addr) (const char * cp);
6434int (PASCAL *pfn_gethostname) (char * name, int namelen);
6435struct hostent * (PASCAL *pfn_gethostbyname) (const char * name);
6436struct servent * (PASCAL *pfn_getservbyname) (const char * name, const char * proto);
ecd270eb 6437int (PASCAL *pfn_getpeername) (SOCKET s, struct sockaddr *addr, int * namelen);
962955c5
JR		 6438int (PASCAL *pfn_setsockopt) (SOCKET s, int level, int optname,
6439 const char * optval, int optlen);
6440int (PASCAL *pfn_listen) (SOCKET s, int backlog);
6441int (PASCAL *pfn_getsockname) (SOCKET s, struct sockaddr * name,
6442 int * namelen);
6443SOCKET (PASCAL *pfn_accept) (SOCKET s, struct sockaddr * addr, int * addrlen);
6444int (PASCAL *pfn_recvfrom) (SOCKET s, char * buf, int len, int flags,
6445 struct sockaddr * from, int * fromlen);
6446int (PASCAL *pfn_sendto) (SOCKET s, const char * buf, int len, int flags,
6447 const struct sockaddr * to, int tolen);
6448
f1614061
RS		 6449/* SetHandleInformation is only needed to make sockets non-inheritable. */
6450BOOL (WINAPI *pfn_SetHandleInformation) (HANDLE object, DWORD mask, DWORD flags);
6451#ifndef HANDLE_FLAG_INHERIT
6452#define HANDLE_FLAG_INHERIT 1
6453#endif
480b0c5b 6454
f249a012
RS		 6455HANDLE winsock_lib;
6456static int winsock_inuse;
480b0c5b 6457
f249a012 6458BOOL
480b0c5b
GV		 6459term_winsock (void)
6460{
f249a012 6461 if (winsock_lib != NULL && winsock_inuse == 0)
480b0c5b 6462 {
3f940c5a 6463 release_listen_threads ();
f249a012
RS		 6464 /* Not sure what would cause WSAENETDOWN, or even if it can happen
6465 after WSAStartup returns successfully, but it seems reasonable
6466 to allow unloading winsock anyway in that case. */
6467 if (pfn_WSACleanup () == 0 ||
6468 pfn_WSAGetLastError () == WSAENETDOWN)
6469 {
6470 if (FreeLibrary (winsock_lib))
6471 winsock_lib = NULL;
6472 return TRUE;
6473 }
480b0c5b 6474 }
f249a012 6475 return FALSE;
480b0c5b
GV		 6476}
6477
f249a012
RS		 6478BOOL
6479init_winsock (int load_now)
480b0c5b
GV		 6480{
6481 WSADATA winsockData;
6482
f249a012
RS		 6483 if (winsock_lib != NULL)
6484 return TRUE;
f1614061 6485
f1614061
RS		 6486 pfn_SetHandleInformation
6487 = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"),
6488 "SetHandleInformation");
6489
64570b36 6490 winsock_lib = LoadLibrary ("Ws2_32.dll");
480b0c5b
GV		 6491
6492 if (winsock_lib != NULL)
6493 {
6494 /* dynamically link to socket functions */
6495
6496#define LOAD_PROC(fn) \
6497 if ((pfn_##fn = (void *) GetProcAddress (winsock_lib, #fn)) == NULL) \
6498 goto fail;
6499
ed3751c8
JB		 6500 LOAD_PROC (WSAStartup);
6501 LOAD_PROC (WSASetLastError);
6502 LOAD_PROC (WSAGetLastError);
6503 LOAD_PROC (WSAEventSelect);
6504 LOAD_PROC (WSACreateEvent);
6505 LOAD_PROC (WSACloseEvent);
6506 LOAD_PROC (socket);
6507 LOAD_PROC (bind);
6508 LOAD_PROC (connect);
6509 LOAD_PROC (ioctlsocket);
6510 LOAD_PROC (recv);
6511 LOAD_PROC (send);
6512 LOAD_PROC (closesocket);
6513 LOAD_PROC (shutdown);
6514 LOAD_PROC (htons);
6515 LOAD_PROC (ntohs);
6516 LOAD_PROC (inet_addr);
6517 LOAD_PROC (gethostname);
6518 LOAD_PROC (gethostbyname);
6519 LOAD_PROC (getservbyname);
6520 LOAD_PROC (getpeername);
6521 LOAD_PROC (WSACleanup);
6522 LOAD_PROC (setsockopt);
6523 LOAD_PROC (listen);
6524 LOAD_PROC (getsockname);
6525 LOAD_PROC (accept);
6526 LOAD_PROC (recvfrom);
6527 LOAD_PROC (sendto);
f249a012
RS		 6528#undef LOAD_PROC
6529
480b0c5b
GV		 6530 /* specify version 1.1 of winsock */
6531 if (pfn_WSAStartup (0x101, &winsockData) == 0)
6532 {
f249a012
RS		 6533 if (winsockData.wVersion != 0x101)
6534 goto fail;
6535
6536 if (!load_now)
6537 {
6538 /* Report that winsock exists and is usable, but leave
6539 socket functions disabled. I am assuming that calling
6540 WSAStartup does not require any network interaction,
6541 and in particular does not cause or require a dial-up
6542 connection to be established. */
6543
6544 pfn_WSACleanup ();
6545 FreeLibrary (winsock_lib);
6546 winsock_lib = NULL;
6547 }
6548 winsock_inuse = 0;
6549 return TRUE;
480b0c5b
GV		 6550 }
6551
6552 fail:
6553 FreeLibrary (winsock_lib);
f249a012 6554 winsock_lib = NULL;
480b0c5b 6555 }
f249a012
RS		 6556
6557 return FALSE;
480b0c5b
GV		 6558}
6559
6560
6561int h_errno = 0;
6562
f277993b
EZ		 6563/* Function to map winsock error codes to errno codes for those errno
6564 code defined in errno.h (errno values not defined by errno.h are
6565 already in nt/inc/sys/socket.h). */
9bfb11f9 6566static void
b56ceb92 6567set_errno (void)
480b0c5b 6568{
f277993b
EZ		 6569 int wsa_err;
6570
6571 h_errno = 0;
f249a012 6572 if (winsock_lib == NULL)
f277993b 6573 wsa_err = EINVAL;
480b0c5b 6574 else
f277993b 6575 wsa_err = pfn_WSAGetLastError ();
480b0c5b 6576
f277993b 6577 switch (wsa_err)
480b0c5b 6578 {
f277993b
EZ		 6579 case WSAEACCES: errno = EACCES; break;
6580 case WSAEBADF: errno = EBADF; break;
6581 case WSAEFAULT: errno = EFAULT; break;
6582 case WSAEINTR: errno = EINTR; break;
6583 case WSAEINVAL: errno = EINVAL; break;
6584 case WSAEMFILE: errno = EMFILE; break;
6585 case WSAENAMETOOLONG: errno = ENAMETOOLONG; break;
6586 case WSAENOTEMPTY: errno = ENOTEMPTY; break;
6587 default: errno = wsa_err; break;
480b0c5b 6588 }
480b0c5b
GV		 6589}
6590
9bfb11f9 6591static void
b56ceb92 6592check_errno (void)
480b0c5b 6593{
f277993b
EZ		 6594 h_errno = 0;
6595 if (winsock_lib != NULL)
480b0c5b
GV		 6596 pfn_WSASetLastError (0);
6597}
6598
d8fcc1b9
AI		 6599/* Extend strerror to handle the winsock-specific error codes. */
6600struct {
6601 int errnum;
6602 char * msg;
6603} _wsa_errlist[] = {
1db5b1ad
JB		 6604 {WSAEINTR , "Interrupted function call"},
6605 {WSAEBADF , "Bad file descriptor"},
6606 {WSAEACCES , "Permission denied"},
6607 {WSAEFAULT , "Bad address"},
6608 {WSAEINVAL , "Invalid argument"},
6609 {WSAEMFILE , "Too many open files"},
6610
6611 {WSAEWOULDBLOCK , "Resource temporarily unavailable"},
6612 {WSAEINPROGRESS , "Operation now in progress"},
6613 {WSAEALREADY , "Operation already in progress"},
6614 {WSAENOTSOCK , "Socket operation on non-socket"},
6615 {WSAEDESTADDRREQ , "Destination address required"},
6616 {WSAEMSGSIZE , "Message too long"},
6617 {WSAEPROTOTYPE , "Protocol wrong type for socket"},
6618 {WSAENOPROTOOPT , "Bad protocol option"},
6619 {WSAEPROTONOSUPPORT , "Protocol not supported"},
6620 {WSAESOCKTNOSUPPORT , "Socket type not supported"},
6621 {WSAEOPNOTSUPP , "Operation not supported"},
6622 {WSAEPFNOSUPPORT , "Protocol family not supported"},
6623 {WSAEAFNOSUPPORT , "Address family not supported by protocol family"},
6624 {WSAEADDRINUSE , "Address already in use"},
6625 {WSAEADDRNOTAVAIL , "Cannot assign requested address"},
6626 {WSAENETDOWN , "Network is down"},
6627 {WSAENETUNREACH , "Network is unreachable"},
6628 {WSAENETRESET , "Network dropped connection on reset"},
6629 {WSAECONNABORTED , "Software caused connection abort"},
6630 {WSAECONNRESET , "Connection reset by peer"},
6631 {WSAENOBUFS , "No buffer space available"},
6632 {WSAEISCONN , "Socket is already connected"},
6633 {WSAENOTCONN , "Socket is not connected"},
6634 {WSAESHUTDOWN , "Cannot send after socket shutdown"},
6635 {WSAETOOMANYREFS , "Too many references"}, /* not sure */
6636 {WSAETIMEDOUT , "Connection timed out"},
6637 {WSAECONNREFUSED , "Connection refused"},
6638 {WSAELOOP , "Network loop"}, /* not sure */
6639 {WSAENAMETOOLONG , "Name is too long"},
6640 {WSAEHOSTDOWN , "Host is down"},
6641 {WSAEHOSTUNREACH , "No route to host"},
6642 {WSAENOTEMPTY , "Buffer not empty"}, /* not sure */
6643 {WSAEPROCLIM , "Too many processes"},
6644 {WSAEUSERS , "Too many users"}, /* not sure */
6645 {WSAEDQUOT , "Double quote in host name"}, /* really not sure */
6646 {WSAESTALE , "Data is stale"}, /* not sure */
6647 {WSAEREMOTE , "Remote error"}, /* not sure */
6648
6649 {WSASYSNOTREADY , "Network subsystem is unavailable"},
6650 {WSAVERNOTSUPPORTED , "WINSOCK.DLL version out of range"},
6651 {WSANOTINITIALISED , "Winsock not initialized successfully"},
6652 {WSAEDISCON , "Graceful shutdown in progress"},
d8fcc1b9 6653#ifdef WSAENOMORE
1db5b1ad
JB		 6654 {WSAENOMORE , "No more operations allowed"}, /* not sure */
6655 {WSAECANCELLED , "Operation cancelled"}, /* not sure */
6656 {WSAEINVALIDPROCTABLE , "Invalid procedure table from service provider"},
6657 {WSAEINVALIDPROVIDER , "Invalid service provider version number"},
6658 {WSAEPROVIDERFAILEDINIT , "Unable to initialize a service provider"},
6659 {WSASYSCALLFAILURE , "System call failure"},
6660 {WSASERVICE_NOT_FOUND , "Service not found"}, /* not sure */
6661 {WSATYPE_NOT_FOUND , "Class type not found"},
6662 {WSA_E_NO_MORE , "No more resources available"}, /* really not sure */
6663 {WSA_E_CANCELLED , "Operation already cancelled"}, /* really not sure */
6664 {WSAEREFUSED , "Operation refused"}, /* not sure */
d8fcc1b9 6665#endif
177c0ea7 6666
1db5b1ad
JB		 6667 {WSAHOST_NOT_FOUND , "Host not found"},
6668 {WSATRY_AGAIN , "Authoritative host not found during name lookup"},
6669 {WSANO_RECOVERY , "Non-recoverable error during name lookup"},
6670 {WSANO_DATA , "Valid name, no data record of requested type"},
d8fcc1b9 6671
1db5b1ad 6672 {-1, NULL}
d8fcc1b9
AI		 6673};
6674
6675char *
ed3751c8 6676sys_strerror (int error_no)
d8fcc1b9
AI		 6677{
6678 int i;
6679 static char unknown_msg[40];
6680
a302c7ae
AI		 6681 if (error_no >= 0 && error_no < sys_nerr)
6682 return sys_errlist[error_no];
d8fcc1b9
AI		 6683
6684 for (i = 0; _wsa_errlist[i].errnum >= 0; i++)
6685 if (_wsa_errlist[i].errnum == error_no)
6686 return _wsa_errlist[i].msg;
6687
ed3751c8 6688 sprintf (unknown_msg, "Unidentified error: %d", error_no);
d8fcc1b9
AI		 6689 return unknown_msg;
6690}
6691
480b0c5b
GV		 6692/* [andrewi 3-May-96] I've had conflicting results using both methods,
6693 but I believe the method of keeping the socket handle separate (and
6694 insuring it is not inheritable) is the correct one. */
6695
480b0c5b 6696#define SOCK_HANDLE(fd) ((SOCKET) fd_info[fd].hnd)
480b0c5b 6697
bedf4aab 6698static int socket_to_fd (SOCKET s);
962955c5 6699
480b0c5b 6700int
ed3751c8 6701sys_socket (int af, int type, int protocol)
480b0c5b 6702{
962955c5 6703 SOCKET s;
480b0c5b 6704
f249a012 6705 if (winsock_lib == NULL)
480b0c5b 6706 {
f277993b 6707 errno = ENETDOWN;
480b0c5b
GV		 6708 return INVALID_SOCKET;
6709 }
6710
6711 check_errno ();
6712
6713 /* call the real socket function */
962955c5 6714 s = pfn_socket (af, type, protocol);
177c0ea7 6715
480b0c5b 6716 if (s != INVALID_SOCKET)
f277993b 6717 return socket_to_fd (s);
480b0c5b 6718
962955c5
JR		 6719 set_errno ();
6720 return -1;
6721}
6722
6723/* Convert a SOCKET to a file descriptor. */
bedf4aab 6724static int
962955c5
JR		 6725socket_to_fd (SOCKET s)
6726{
6727 int fd;
6728 child_process * cp;
6729
6730 /* Although under NT 3.5 _open_osfhandle will accept a socket
6731 handle, if opened with SO_OPENTYPE == SO_SYNCHRONOUS_NONALERT,
6732 that does not work under NT 3.1. However, we can get the same
6733 effect by using a backdoor function to replace an existing
6734 descriptor handle with the one we want. */
6735
6736 /* allocate a file descriptor (with appropriate flags) */
6737 fd = _open ("NUL:", _O_RDWR);
6738 if (fd >= 0)
6739 {
962955c5
JR		 6740 /* Make a non-inheritable copy of the socket handle. Note
6741 that it is possible that sockets aren't actually kernel
6742 handles, which appears to be the case on Windows 9x when
6743 the MS Proxy winsock client is installed. */
6744 {
6745 /* Apparently there is a bug in NT 3.51 with some service
6746 packs, which prevents using DuplicateHandle to make a
6747 socket handle non-inheritable (causes WSACleanup to
6748 hang). The work-around is to use SetHandleInformation
6749 instead if it is available and implemented. */
6750 if (pfn_SetHandleInformation)
480b0c5b 6751 {
962955c5
JR		 6752 pfn_SetHandleInformation ((HANDLE) s, HANDLE_FLAG_INHERIT, 0);
6753 }
6754 else
6755 {
6756 HANDLE parent = GetCurrentProcess ();
6757 HANDLE new_s = INVALID_HANDLE_VALUE;
6758
6759 if (DuplicateHandle (parent,
6760 (HANDLE) s,
6761 parent,
6762 &new_s,
6763 0,
6764 FALSE,
6765 DUPLICATE_SAME_ACCESS))
f1614061 6766 {
962955c5
JR		 6767 /* It is possible that DuplicateHandle succeeds even
6768 though the socket wasn't really a kernel handle,
6769 because a real handle has the same value. So
6770 test whether the new handle really is a socket. */
6771 long nonblocking = 0;
6772 if (pfn_ioctlsocket ((SOCKET) new_s, FIONBIO, &nonblocking) == 0)
ca149beb 6773 {
962955c5
JR		 6774 pfn_closesocket (s);
6775 s = (SOCKET) new_s;
6776 }
6777 else
6778 {
6779 CloseHandle (new_s);
6780 }
177c0ea7 6781 }
480b0c5b 6782 }
962955c5 6783 }
bcf7fe2a 6784 eassert (fd < MAXDESC);
962955c5 6785 fd_info[fd].hnd = (HANDLE) s;
480b0c5b 6786
962955c5
JR		 6787 /* set our own internal flags */
6788 fd_info[fd].flags = FILE_SOCKET | FILE_BINARY | FILE_READ | FILE_WRITE;
480b0c5b 6789
962955c5
JR		 6790 cp = new_child ();
6791 if (cp)
6792 {
6793 cp->fd = fd;
6794 cp->status = STATUS_READ_ACKNOWLEDGED;
480b0c5b 6795
962955c5
JR		 6796 /* attach child_process to fd_info */
6797 if (fd_info[ fd ].cp != NULL)
6798 {
6799 DebPrint (("sys_socket: fd_info[%d] apparently in use!\n", fd));
1088b922 6800 emacs_abort ();
480b0c5b
GV		 6801 }
6802
962955c5
JR		 6803 fd_info[ fd ].cp = cp;
6804
6805 /* success! */
6806 winsock_inuse++; /* count open sockets */
6807 return fd;
480b0c5b 6808 }
480b0c5b 6809
962955c5
JR		 6810 /* clean up */
6811 _close (fd);
6812 }
f277993b 6813 else
962955c5 6814 pfn_closesocket (s);
f277993b 6815 errno = EMFILE;
480b0c5b
GV		 6816 return -1;
6817}
6818
480b0c5b
GV		 6819int
6820sys_bind (int s, const struct sockaddr * addr, int namelen)
6821{
f249a012 6822 if (winsock_lib == NULL)
480b0c5b 6823 {
f277993b 6824 errno = ENOTSOCK;
480b0c5b
GV		 6825 return SOCKET_ERROR;
6826 }
6827
6828 check_errno ();
6829 if (fd_info[s].flags & FILE_SOCKET)
6830 {
6831 int rc = pfn_bind (SOCK_HANDLE (s), addr, namelen);
6832 if (rc == SOCKET_ERROR)
6833 set_errno ();
6834 return rc;
6835 }
f277993b 6836 errno = ENOTSOCK;
480b0c5b
GV		 6837 return SOCKET_ERROR;
6838}
6839
480b0c5b
GV		 6840int
6841sys_connect (int s, const struct sockaddr * name, int namelen)
6842{
f249a012 6843 if (winsock_lib == NULL)
480b0c5b 6844 {
f277993b 6845 errno = ENOTSOCK;
480b0c5b
GV		 6846 return SOCKET_ERROR;
6847 }
6848
6849 check_errno ();
6850 if (fd_info[s].flags & FILE_SOCKET)
6851 {
6852 int rc = pfn_connect (SOCK_HANDLE (s), name, namelen);
6853 if (rc == SOCKET_ERROR)
6854 set_errno ();
6855 return rc;
6856 }
f277993b 6857 errno = ENOTSOCK;
480b0c5b
GV		 6858 return SOCKET_ERROR;
6859}
6860
6861u_short
6862sys_htons (u_short hostshort)
6863{
f249a012 6864 return (winsock_lib != NULL) ?
480b0c5b
GV		 6865 pfn_htons (hostshort) : hostshort;
6866}
6867
6868u_short
6869sys_ntohs (u_short netshort)
6870{
f249a012 6871 return (winsock_lib != NULL) ?
480b0c5b
GV		 6872 pfn_ntohs (netshort) : netshort;
6873}
6874
6875unsigned long
6876sys_inet_addr (const char * cp)
6877{
f249a012 6878 return (winsock_lib != NULL) ?
480b0c5b
GV		 6879 pfn_inet_addr (cp) : INADDR_NONE;
6880}
6881
6882int
6883sys_gethostname (char * name, int namelen)
6884{
f249a012 6885 if (winsock_lib != NULL)
f277993b
EZ		 6886 {
6887 int retval;
6888
6889 check_errno ();
6890 retval = pfn_gethostname (name, namelen);
6891 if (retval == SOCKET_ERROR)
6892 set_errno ();
6893 return retval;
6894 }
480b0c5b
GV		 6895
6896 if (namelen > MAX_COMPUTERNAME_LENGTH)
a302c7ae 6897 return !GetComputerName (name, (DWORD *)&namelen);
480b0c5b 6898
f277993b 6899 errno = EFAULT;
480b0c5b
GV		 6900 return SOCKET_ERROR;
6901}
6902
6903struct hostent *
ed3751c8 6904sys_gethostbyname (const char * name)
480b0c5b
GV		 6905{
6906 struct hostent * host;
f277993b 6907 int h_err = h_errno;
480b0c5b 6908
f249a012 6909 if (winsock_lib == NULL)
480b0c5b 6910 {
f277993b
EZ		 6911 h_errno = NO_RECOVERY;
6912 errno = ENETDOWN;
480b0c5b
GV		 6913 return NULL;
6914 }
6915
6916 check_errno ();
6917 host = pfn_gethostbyname (name);
6918 if (!host)
f277993b
EZ		 6919 {
6920 set_errno ();
6921 h_errno = errno;
6922 }
6923 else
6924 h_errno = h_err;
480b0c5b
GV		 6925 return host;
6926}
6927
6928struct servent *
ed3751c8 6929sys_getservbyname (const char * name, const char * proto)
480b0c5b
GV		 6930{
6931 struct servent * serv;
6932
f249a012 6933 if (winsock_lib == NULL)
480b0c5b 6934 {
f277993b 6935 errno = ENETDOWN;
480b0c5b
GV		 6936 return NULL;
6937 }
6938
6939 check_errno ();
6940 serv = pfn_getservbyname (name, proto);
6941 if (!serv)
6942 set_errno ();
6943 return serv;
6944}
6945
ecd270eb
JR		 6946int
6947sys_getpeername (int s, struct sockaddr *addr, int * namelen)
6948{
6949 if (winsock_lib == NULL)
6950 {
f277993b 6951 errno = ENETDOWN;
ecd270eb
JR		 6952 return SOCKET_ERROR;
6953 }
6954
6955 check_errno ();
6956 if (fd_info[s].flags & FILE_SOCKET)
6957 {
6958 int rc = pfn_getpeername (SOCK_HANDLE (s), addr, namelen);
6959 if (rc == SOCKET_ERROR)
6960 set_errno ();
6961 return rc;
6962 }
f277993b 6963 errno = ENOTSOCK;
ecd270eb
JR		 6964 return SOCKET_ERROR;
6965}
6966
380961a6
GV		 6967int
6968sys_shutdown (int s, int how)
6969{
380961a6
GV		 6970 if (winsock_lib == NULL)
6971 {
f277993b 6972 errno = ENETDOWN;
380961a6
GV		 6973 return SOCKET_ERROR;
6974 }
6975
6976 check_errno ();
6977 if (fd_info[s].flags & FILE_SOCKET)
6978 {
6979 int rc = pfn_shutdown (SOCK_HANDLE (s), how);
962955c5
JR		 6980 if (rc == SOCKET_ERROR)
6981 set_errno ();
6982 return rc;
6983 }
f277993b 6984 errno = ENOTSOCK;
962955c5
JR		 6985 return SOCKET_ERROR;
6986}
6987
6988int
a5a389bb 6989sys_setsockopt (int s, int level, int optname, const void * optval, int optlen)
962955c5
JR		 6990{
6991 if (winsock_lib == NULL)
6992 {
f277993b 6993 errno = ENETDOWN;
962955c5
JR		 6994 return SOCKET_ERROR;
6995 }
6996
6997 check_errno ();
6998 if (fd_info[s].flags & FILE_SOCKET)
6999 {
7000 int rc = pfn_setsockopt (SOCK_HANDLE (s), level, optname,
a5a389bb 7001 (const char *)optval, optlen);
962955c5
JR		 7002 if (rc == SOCKET_ERROR)
7003 set_errno ();
7004 return rc;
7005 }
f277993b 7006 errno = ENOTSOCK;
177c0ea7 7007 return SOCKET_ERROR;
962955c5
JR		 7008}
7009
7010int
7011sys_listen (int s, int backlog)
7012{
7013 if (winsock_lib == NULL)
7014 {
f277993b 7015 errno = ENETDOWN;
962955c5
JR		 7016 return SOCKET_ERROR;
7017 }
7018
7019 check_errno ();
7020 if (fd_info[s].flags & FILE_SOCKET)
7021 {
7022 int rc = pfn_listen (SOCK_HANDLE (s), backlog);
7023 if (rc == SOCKET_ERROR)
7024 set_errno ();
26fb7bc4 7025 else
64570b36 7026 fd_info[s].flags |= FILE_LISTEN;
962955c5
JR		 7027 return rc;
7028 }
f277993b 7029 errno = ENOTSOCK;
177c0ea7 7030 return SOCKET_ERROR;
962955c5
JR		 7031}
7032
7033int
7034sys_getsockname (int s, struct sockaddr * name, int * namelen)
7035{
7036 if (winsock_lib == NULL)
7037 {
f277993b 7038 errno = ENETDOWN;
962955c5
JR		 7039 return SOCKET_ERROR;
7040 }
7041
7042 check_errno ();
7043 if (fd_info[s].flags & FILE_SOCKET)
7044 {
7045 int rc = pfn_getsockname (SOCK_HANDLE (s), name, namelen);
7046 if (rc == SOCKET_ERROR)
7047 set_errno ();
7048 return rc;
7049 }
f277993b 7050 errno = ENOTSOCK;
177c0ea7 7051 return SOCKET_ERROR;
962955c5
JR		 7052}
7053
7054int
7055sys_accept (int s, struct sockaddr * addr, int * addrlen)
7056{
7057 if (winsock_lib == NULL)
7058 {
f277993b 7059 errno = ENETDOWN;
962955c5
JR		 7060 return -1;
7061 }
7062
7063 check_errno ();
26fb7bc4 7064 if (fd_info[s].flags & FILE_LISTEN)
962955c5 7065 {
a0ad1860 7066 SOCKET t = pfn_accept (SOCK_HANDLE (s), addr, addrlen);
64570b36
KS		 7067 int fd = -1;
7068 if (t == INVALID_SOCKET)
7069 set_errno ();
7070 else
f277993b 7071 fd = socket_to_fd (t);
962955c5 7072
bcf7fe2a
EZ		 7073 if (fd >= 0)
7074 {
7075 fd_info[s].cp->status = STATUS_READ_ACKNOWLEDGED;
7076 ResetEvent (fd_info[s].cp->char_avail);
7077 }
64570b36 7078 return fd;
962955c5 7079 }
f277993b 7080 errno = ENOTSOCK;
962955c5
JR		 7081 return -1;
7082}
7083
7084int
7085sys_recvfrom (int s, char * buf, int len, int flags,
b56ceb92 7086 struct sockaddr * from, int * fromlen)
962955c5
JR		 7087{
7088 if (winsock_lib == NULL)
7089 {
f277993b 7090 errno = ENETDOWN;
962955c5
JR		 7091 return SOCKET_ERROR;
7092 }
7093
7094 check_errno ();
7095 if (fd_info[s].flags & FILE_SOCKET)
7096 {
7097 int rc = pfn_recvfrom (SOCK_HANDLE (s), buf, len, flags, from, fromlen);
7098 if (rc == SOCKET_ERROR)
7099 set_errno ();
7100 return rc;
7101 }
f277993b 7102 errno = ENOTSOCK;
962955c5
JR		 7103 return SOCKET_ERROR;
7104}
7105
7106int
7107sys_sendto (int s, const char * buf, int len, int flags,
7108 const struct sockaddr * to, int tolen)
7109{
7110 if (winsock_lib == NULL)
7111 {
f277993b 7112 errno = ENETDOWN;
962955c5
JR		 7113 return SOCKET_ERROR;
7114 }
7115
7116 check_errno ();
7117 if (fd_info[s].flags & FILE_SOCKET)
7118 {
7119 int rc = pfn_sendto (SOCK_HANDLE (s), buf, len, flags, to, tolen);
380961a6
GV		 7120 if (rc == SOCKET_ERROR)
7121 set_errno ();
7122 return rc;
7123 }
f277993b 7124 errno = ENOTSOCK;
380961a6
GV		 7125 return SOCKET_ERROR;
7126}
7127
ecd270eb 7128/* Windows does not have an fcntl function. Provide an implementation
067428c1 7129 good enough for Emacs. */
ecd270eb
JR		 7130int
7131fcntl (int s, int cmd, int options)
7132{
067428c1
PE		 7133 /* In the w32 Emacs port, fcntl (fd, F_DUPFD_CLOEXEC, fd1) is always
7134 invoked in a context where fd1 is closed and all descriptors less
7135 than fd1 are open, so sys_dup is an adequate implementation. */
7136 if (cmd == F_DUPFD_CLOEXEC)
7137 return sys_dup (s);
7138
ecd270eb
JR		 7139 if (winsock_lib == NULL)
7140 {
f277993b 7141 errno = ENETDOWN;
ecd270eb
JR		 7142 return -1;
7143 }
7144
7145 check_errno ();
7146 if (fd_info[s].flags & FILE_SOCKET)
7147 {
49cdacda 7148 if (cmd == F_SETFL && options == O_NONBLOCK)
ecd270eb
JR		 7149 {
7150 unsigned long nblock = 1;
7151 int rc = pfn_ioctlsocket (SOCK_HANDLE (s), FIONBIO, &nblock);
7152 if (rc == SOCKET_ERROR)
9d4f32e8 7153 set_errno ();
ecd270eb
JR		 7154 /* Keep track of the fact that we set this to non-blocking. */
7155 fd_info[s].flags |= FILE_NDELAY;
7156 return rc;
7157 }
7158 else
7159 {
f277993b 7160 errno = EINVAL;
ecd270eb
JR		 7161 return SOCKET_ERROR;
7162 }
7163 }
f277993b 7164 errno = ENOTSOCK;
ecd270eb
JR		 7165 return SOCKET_ERROR;
7166}
7167
480b0c5b
GV		 7168
7169/* Shadow main io functions: we need to handle pipes and sockets more
7170 intelligently, and implement non-blocking mode as well. */
7171
7172int
7173sys_close (int fd)
7174{
7175 int rc;
7176
7559f399 7177 if (fd < 0)
480b0c5b
GV		 7178 {
7179 errno = EBADF;
7180 return -1;
7181 }
7182
7559f399 7183 if (fd < MAXDESC && fd_info[fd].cp)
480b0c5b
GV		 7184 {
7185 child_process * cp = fd_info[fd].cp;
7186
7187 fd_info[fd].cp = NULL;
7188
7189 if (CHILD_ACTIVE (cp))
7190 {
7191 /* if last descriptor to active child_process then cleanup */
7192 int i;
7193 for (i = 0; i < MAXDESC; i++)
7194 {
7195 if (i == fd)
7196 continue;
7197 if (fd_info[i].cp == cp)
7198 break;
7199 }
7200 if (i == MAXDESC)
7201 {
480b0c5b
GV		 7202 if (fd_info[fd].flags & FILE_SOCKET)
7203 {
1088b922 7204 if (winsock_lib == NULL) emacs_abort ();
480b0c5b
GV		 7205
7206 pfn_shutdown (SOCK_HANDLE (fd), 2);
7207 rc = pfn_closesocket (SOCK_HANDLE (fd));
7d701334 7208
f249a012 7209 winsock_inuse--; /* count open sockets */
480b0c5b 7210 }
299614f3
EZ		 7211 /* If the process handle is NULL, it's either a socket
7212 or serial connection, or a subprocess that was
7213 already reaped by reap_subprocess, but whose
7214 resources were not yet freed, because its output was
7215 not fully read yet by the time it was reaped. (This
7216 usually happens with async subprocesses whose output
7217 is being read by Emacs.) Otherwise, this process was
7218 not reaped yet, so we set its FD to a negative value
7219 to make sure sys_select will eventually get to
7220 calling the SIGCHLD handler for it, which will then
7221 invoke waitpid and reap_subprocess. */
7222 if (cp->procinfo.hProcess == NULL)
7223 delete_child (cp);
7224 else
7225 cp->fd = -1;
480b0c5b
GV		 7226 }
7227 }
7228 }
7229
224f4ec1
EZ		 7230 if (fd >= 0 && fd < MAXDESC)
7231 fd_info[fd].flags = 0;
7232
480b0c5b 7233 /* Note that sockets do not need special treatment here (at least on
e9e23e23 7234 NT and Windows 95 using the standard tcp/ip stacks) - it appears that
480b0c5b
GV		 7235 closesocket is equivalent to CloseHandle, which is to be expected
7236 because socket handles are fully fledged kernel handles. */
7237 rc = _close (fd);
7238
480b0c5b
GV		 7239 return rc;
7240}
7241
7242int
7243sys_dup (int fd)
7244{
7245 int new_fd;
7246
7247 new_fd = _dup (fd);
7559f399 7248 if (new_fd >= 0 && new_fd < MAXDESC)
480b0c5b
GV		 7249 {
7250 /* duplicate our internal info as well */
7251 fd_info[new_fd] = fd_info[fd];
7252 }
7253 return new_fd;
7254}
7255
480b0c5b
GV		 7256int
7257sys_dup2 (int src, int dst)
7258{
7259 int rc;
7260
7261 if (dst < 0 || dst >= MAXDESC)
7262 {
7263 errno = EBADF;
7264 return -1;
7265 }
7266
7267 /* make sure we close the destination first if it's a pipe or socket */
7268 if (src != dst && fd_info[dst].flags != 0)
7269 sys_close (dst);
177c0ea7 7270
480b0c5b
GV		 7271 rc = _dup2 (src, dst);
7272 if (rc == 0)
7273 {
7274 /* duplicate our internal info as well */
7275 fd_info[dst] = fd_info[src];
7276 }
7277 return rc;
7278}
7279
480b0c5b 7280int
067428c1 7281pipe2 (int * phandles, int pipe2_flags)
480b0c5b
GV		 7282{
7283 int rc;
7284 unsigned flags;
480b0c5b 7285
067428c1
PE		 7286 eassert (pipe2_flags == O_CLOEXEC);
7287
76b3903d
GV		 7288 /* make pipe handles non-inheritable; when we spawn a child, we
7289 replace the relevant handle with an inheritable one. Also put
7290 pipes into binary mode; we will do text mode translation ourselves
7291 if required. */
7292 rc = _pipe (phandles, 0, _O_NOINHERIT | _O_BINARY);
480b0c5b
GV		 7293
7294 if (rc == 0)
7295 {
cb72110d
JR		 7296 /* Protect against overflow, since Windows can open more handles than
7297 our fd_info array has room for. */
7298 if (phandles[0] >= MAXDESC || phandles[1] >= MAXDESC)
7299 {
7300 _close (phandles[0]);
7301 _close (phandles[1]);
6e432f0c 7302 errno = EMFILE;
cb72110d
JR		 7303 rc = -1;
7304 }
7305 else
7306 {
7307 flags = FILE_PIPE | FILE_READ | FILE_BINARY;
7308 fd_info[phandles[0]].flags = flags;
480b0c5b 7309
cb72110d
JR		 7310 flags = FILE_PIPE | FILE_WRITE | FILE_BINARY;
7311 fd_info[phandles[1]].flags = flags;
7312 }
480b0c5b
GV		 7313 }
7314
7315 return rc;
7316}
7317
7318/* Function to do blocking read of one byte, needed to implement
d3d14b40
EZ		 7319 select. It is only allowed on communication ports, sockets, or
7320 pipes. */
480b0c5b
GV		 7321int
7322_sys_read_ahead (int fd)
7323{
7324 child_process * cp;
7325 int rc;
7326
7327 if (fd < 0 || fd >= MAXDESC)
7328 return STATUS_READ_ERROR;
7329
7330 cp = fd_info[fd].cp;
7331
7332 if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY)
7333 return STATUS_READ_ERROR;
7334
d888760c 7335 if ((fd_info[fd].flags & (FILE_PIPE | FILE_SERIAL | FILE_SOCKET)) == 0
480b0c5b
GV		 7336 || (fd_info[fd].flags & FILE_READ) == 0)
7337 {
d888760c 7338 DebPrint (("_sys_read_ahead: internal error: fd %d is not a pipe, serial port, or socket!\n", fd));
1088b922 7339 emacs_abort ();
480b0c5b 7340 }
177c0ea7 7341
480b0c5b 7342 cp->status = STATUS_READ_IN_PROGRESS;
177c0ea7 7343
480b0c5b 7344 if (fd_info[fd].flags & FILE_PIPE)
f7554349 7345 {
f7554349
KH		 7346 rc = _read (fd, &cp->chr, sizeof (char));
7347
7348 /* Give subprocess time to buffer some more output for us before
e9e23e23 7349 reporting that input is available; we need this because Windows 95
f7554349
KH		 7350 connects DOS programs to pipes by making the pipe appear to be
7351 the normal console stdout - as a result most DOS programs will
d888760c 7352 write to stdout without buffering, ie. one character at a
fbd6baed 7353 time. Even some W32 programs do this - "dir" in a command
f7554349
KH		 7354 shell on NT is very slow if we don't do this. */
7355 if (rc > 0)
7356 {
78806724 7357 int wait = w32_pipe_read_delay;
f7554349
KH		 7358
7359 if (wait > 0)
7360 Sleep (wait);
7361 else if (wait < 0)
7362 while (++wait <= 0)
7363 /* Yield remainder of our time slice, effectively giving a
7364 temporary priority boost to the child process. */
7365 Sleep (0);
7366 }
7367 }
d888760c
GM		 7368 else if (fd_info[fd].flags & FILE_SERIAL)
7369 {
7370 HANDLE hnd = fd_info[fd].hnd;
7371 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_read;
7372 COMMTIMEOUTS ct;
7373
7374 /* Configure timeouts for blocking read. */
7375 if (!GetCommTimeouts (hnd, &ct))
6e432f0c
EZ		 7376 {
7377 cp->status = STATUS_READ_ERROR;
7378 return STATUS_READ_ERROR;
7379 }
d888760c
GM		 7380 ct.ReadIntervalTimeout = 0;
7381 ct.ReadTotalTimeoutMultiplier = 0;
7382 ct.ReadTotalTimeoutConstant = 0;
7383 if (!SetCommTimeouts (hnd, &ct))
6e432f0c
EZ		 7384 {
7385 cp->status = STATUS_READ_ERROR;
7386 return STATUS_READ_ERROR;
7387 }
d888760c
GM		 7388
7389 if (!ReadFile (hnd, &cp->chr, sizeof (char), (DWORD*) &rc, ovl))
7390 {
7391 if (GetLastError () != ERROR_IO_PENDING)
6e432f0c
EZ		 7392 {
7393 cp->status = STATUS_READ_ERROR;
7394 return STATUS_READ_ERROR;
7395 }
d888760c 7396 if (!GetOverlappedResult (hnd, ovl, (DWORD*) &rc, TRUE))
6e432f0c
EZ		 7397 {
7398 cp->status = STATUS_READ_ERROR;
7399 return STATUS_READ_ERROR;
7400 }
d888760c
GM		 7401 }
7402 }
480b0c5b 7403 else if (fd_info[fd].flags & FILE_SOCKET)
ecd270eb
JR		 7404 {
7405 unsigned long nblock = 0;
7406 /* We always want this to block, so temporarily disable NDELAY. */
7407 if (fd_info[fd].flags & FILE_NDELAY)
7408 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
7409
7410 rc = pfn_recv (SOCK_HANDLE (fd), &cp->chr, sizeof (char), 0);
7411
7412 if (fd_info[fd].flags & FILE_NDELAY)
7413 {
7414 nblock = 1;
7415 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
7416 }
7417 }
177c0ea7 7418
480b0c5b
GV		 7419 if (rc == sizeof (char))
7420 cp->status = STATUS_READ_SUCCEEDED;
7421 else
7422 cp->status = STATUS_READ_FAILED;
7423
7424 return cp->status;
7425}
7426
9bfb11f9
KS		 7427int
7428_sys_wait_accept (int fd)
64570b36
KS		 7429{
7430 HANDLE hEv;
7431 child_process * cp;
7432 int rc;
7433
7434 if (fd < 0 || fd >= MAXDESC)
7435 return STATUS_READ_ERROR;
7436
7437 cp = fd_info[fd].cp;
7438
7439 if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY)
7440 return STATUS_READ_ERROR;
7441
7442 cp->status = STATUS_READ_FAILED;
7443
7444 hEv = pfn_WSACreateEvent ();
7445 rc = pfn_WSAEventSelect (SOCK_HANDLE (fd), hEv, FD_ACCEPT);
7446 if (rc != SOCKET_ERROR)
7447 {
3f940c5a
EZ		 7448 do {
7449 rc = WaitForSingleObject (hEv, 500);
7450 Sleep (5);
7451 } while (rc == WAIT_TIMEOUT
7452 && cp->status != STATUS_READ_ERROR
7453 && cp->char_avail);
64570b36 7454 pfn_WSAEventSelect (SOCK_HANDLE (fd), NULL, 0);
64570b36
KS		 7455 if (rc == WAIT_OBJECT_0)
7456 cp->status = STATUS_READ_SUCCEEDED;
7457 }
7046f191 7458 pfn_WSACloseEvent (hEv);
64570b36
KS		 7459
7460 return cp->status;
7461}
7462
480b0c5b
GV		 7463int
7464sys_read (int fd, char * buffer, unsigned int count)
7465{
7466 int nchars;
480b0c5b
GV		 7467 int to_read;
7468 DWORD waiting;
76b3903d 7469 char * orig_buffer = buffer;
480b0c5b 7470
7559f399 7471 if (fd < 0)
480b0c5b
GV		 7472 {
7473 errno = EBADF;
7474 return -1;
7475 }
7476
d888760c 7477 if (fd < MAXDESC && fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET | FILE_SERIAL))
480b0c5b
GV		 7478 {
7479 child_process *cp = fd_info[fd].cp;
7480
7481 if ((fd_info[fd].flags & FILE_READ) == 0)
7482 {
7483 errno = EBADF;
7484 return -1;
7485 }
7486
76b3903d
GV		 7487 nchars = 0;
7488
7489 /* re-read CR carried over from last read */
7490 if (fd_info[fd].flags & FILE_LAST_CR)
7491 {
1088b922 7492 if (fd_info[fd].flags & FILE_BINARY) emacs_abort ();
76b3903d
GV		 7493 *buffer++ = 0x0d;
7494 count--;
7495 nchars++;
f52eb3ef 7496 fd_info[fd].flags &= ~FILE_LAST_CR;
76b3903d
GV		 7497 }
7498
480b0c5b
GV		 7499 /* presence of a child_process structure means we are operating in
7500 non-blocking mode - otherwise we just call _read directly.
7501 Note that the child_process structure might be missing because
7502 reap_subprocess has been called; in this case the pipe is
7503 already broken, so calling _read on it is okay. */
7504 if (cp)
7505 {
7506 int current_status = cp->status;
7507
7508 switch (current_status)
7509 {
7510 case STATUS_READ_FAILED:
7511 case STATUS_READ_ERROR:
f52eb3ef
GV		 7512 /* report normal EOF if nothing in buffer */
7513 if (nchars <= 0)
7514 fd_info[fd].flags |= FILE_AT_EOF;
7515 return nchars;
480b0c5b
GV		 7516
7517 case STATUS_READ_READY:
7518 case STATUS_READ_IN_PROGRESS:
7519 DebPrint (("sys_read called when read is in progress\n"));
7520 errno = EWOULDBLOCK;
7521 return -1;
7522
7523 case STATUS_READ_SUCCEEDED:
7524 /* consume read-ahead char */
7525 *buffer++ = cp->chr;
7526 count--;
76b3903d 7527 nchars++;
480b0c5b
GV		 7528 cp->status = STATUS_READ_ACKNOWLEDGED;
7529 ResetEvent (cp->char_avail);
7530
7531 case STATUS_READ_ACKNOWLEDGED:
7532 break;
7533
7534 default:
7535 DebPrint (("sys_read: bad status %d\n", current_status));
7536 errno = EBADF;
7537 return -1;
7538 }
7539
7540 if (fd_info[fd].flags & FILE_PIPE)
7541 {
7542 PeekNamedPipe ((HANDLE) _get_osfhandle (fd), NULL, 0, NULL, &waiting, NULL);
7543 to_read = min (waiting, (DWORD) count);
f52eb3ef
GV		 7544
7545 if (to_read > 0)
7546 nchars += _read (fd, buffer, to_read);
480b0c5b 7547 }
d888760c
GM		 7548 else if (fd_info[fd].flags & FILE_SERIAL)
7549 {
7550 HANDLE hnd = fd_info[fd].hnd;
7551 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_read;
d888760c
GM		 7552 int rc = 0;
7553 COMMTIMEOUTS ct;
7554
7555 if (count > 0)
7556 {
7557 /* Configure timeouts for non-blocking read. */
7558 if (!GetCommTimeouts (hnd, &ct))
7559 {
7560 errno = EIO;
7561 return -1;
7562 }
7563 ct.ReadIntervalTimeout = MAXDWORD;
7564 ct.ReadTotalTimeoutMultiplier = 0;
7565 ct.ReadTotalTimeoutConstant = 0;
7566 if (!SetCommTimeouts (hnd, &ct))
7567 {
7568 errno = EIO;
7569 return -1;
7570 }
7571
7572 if (!ResetEvent (ovl->hEvent))
7573 {
7574 errno = EIO;
7575 return -1;
7576 }
7577 if (!ReadFile (hnd, buffer, count, (DWORD*) &rc, ovl))
7578 {
7579 if (GetLastError () != ERROR_IO_PENDING)
7580 {
7581 errno = EIO;
7582 return -1;
7583 }
7584 if (!GetOverlappedResult (hnd, ovl, (DWORD*) &rc, TRUE))
7585 {
7586 errno = EIO;
7587 return -1;
7588 }
7589 }
7590 nchars += rc;
7591 }
7592 }
480b0c5b
GV		 7593 else /* FILE_SOCKET */
7594 {
1088b922 7595 if (winsock_lib == NULL) emacs_abort ();
480b0c5b
GV		 7596
7597 /* do the equivalent of a non-blocking read */
7598 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONREAD, &waiting);
76b3903d 7599 if (waiting == 0 && nchars == 0)
480b0c5b 7600 {
f277993b 7601 errno = EWOULDBLOCK;
480b0c5b
GV		 7602 return -1;
7603 }
7604
480b0c5b
GV		 7605 if (waiting)
7606 {
7607 /* always use binary mode for sockets */
76b3903d
GV		 7608 int res = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0);
7609 if (res == SOCKET_ERROR)
480b0c5b 7610 {
ed3751c8
JB		 7611 DebPrint (("sys_read.recv failed with error %d on socket %ld\n",
7612 pfn_WSAGetLastError (), SOCK_HANDLE (fd)));
76b3903d
GV		 7613 set_errno ();
7614 return -1;
480b0c5b 7615 }
76b3903d 7616 nchars += res;
480b0c5b
GV		 7617 }
7618 }
480b0c5b
GV		 7619 }
7620 else
f52eb3ef
GV		 7621 {
7622 int nread = _read (fd, buffer, count);
7623 if (nread >= 0)
7624 nchars += nread;
7625 else if (nchars == 0)
7626 nchars = nread;
7627 }
76b3903d 7628
f52eb3ef
GV		 7629 if (nchars <= 0)
7630 fd_info[fd].flags |= FILE_AT_EOF;
76b3903d 7631 /* Perform text mode translation if required. */
f52eb3ef 7632 else if ((fd_info[fd].flags & FILE_BINARY) == 0)
76b3903d
GV		 7633 {
7634 nchars = crlf_to_lf (nchars, orig_buffer);
7635 /* If buffer contains only CR, return that. To be absolutely
7636 sure we should attempt to read the next char, but in
7637 practice a CR to be followed by LF would not appear by
7638 itself in the buffer. */
7639 if (nchars > 1 && orig_buffer[nchars - 1] == 0x0d)
7640 {
7641 fd_info[fd].flags |= FILE_LAST_CR;
7642 nchars--;
7643 }
76b3903d 7644 }
480b0c5b
GV		 7645 }
7646 else
7647 nchars = _read (fd, buffer, count);
7648
76b3903d 7649 return nchars;
480b0c5b
GV		 7650}
7651
d888760c
GM		 7652/* From w32xfns.c */
7653extern HANDLE interrupt_handle;
7654
480b0c5b
GV		 7655/* For now, don't bother with a non-blocking mode */
7656int
7657sys_write (int fd, const void * buffer, unsigned int count)
7658{
7659 int nchars;
7660
7559f399 7661 if (fd < 0)
480b0c5b
GV		 7662 {
7663 errno = EBADF;
7664 return -1;
7665 }
7666
d888760c 7667 if (fd < MAXDESC && fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET | FILE_SERIAL))
76b3903d
GV		 7668 {
7669 if ((fd_info[fd].flags & FILE_WRITE) == 0)
7670 {
7671 errno = EBADF;
7672 return -1;
7673 }
7674
7675 /* Perform text mode translation if required. */
7676 if ((fd_info[fd].flags & FILE_BINARY) == 0)
7677 {
7678 char * tmpbuf = alloca (count * 2);
7679 unsigned char * src = (void *)buffer;
7680 unsigned char * dst = tmpbuf;
7681 int nbytes = count;
7682
7683 while (1)
7684 {
7685 unsigned char *next;
7686 /* copy next line or remaining bytes */
7687 next = _memccpy (dst, src, '\n', nbytes);
7688 if (next)
7689 {
7690 /* copied one line ending with '\n' */
7691 int copied = next - dst;
7692 nbytes -= copied;
7693 src += copied;
7694 /* insert '\r' before '\n' */
7695 next[-1] = '\r';
7696 next[0] = '\n';
7697 dst = next + 1;
7698 count++;
177c0ea7 7699 }
76b3903d
GV		 7700 else
7701 /* copied remaining partial line -> now finished */
7702 break;
7703 }
7704 buffer = tmpbuf;
7705 }
7706 }
7707
d888760c
GM		 7708 if (fd < MAXDESC && fd_info[fd].flags & FILE_SERIAL)
7709 {
7710 HANDLE hnd = (HANDLE) _get_osfhandle (fd);
7711 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_write;
7712 HANDLE wait_hnd[2] = { interrupt_handle, ovl->hEvent };
7713 DWORD active = 0;
7714
7715 if (!WriteFile (hnd, buffer, count, (DWORD*) &nchars, ovl))
7716 {
7717 if (GetLastError () != ERROR_IO_PENDING)
7718 {
7719 errno = EIO;
7720 return -1;
7721 }
7722 if (detect_input_pending ())
7723 active = MsgWaitForMultipleObjects (2, wait_hnd, FALSE, INFINITE,
7724 QS_ALLINPUT);
7725 else
7726 active = WaitForMultipleObjects (2, wait_hnd, FALSE, INFINITE);
7727 if (active == WAIT_OBJECT_0)
7728 { /* User pressed C-g, cancel write, then leave. Don't bother
7729 cleaning up as we may only get stuck in buggy drivers. */
7730 PurgeComm (hnd, PURGE_TXABORT | PURGE_TXCLEAR);
7731 CancelIo (hnd);
7732 errno = EIO;
7733 return -1;
7734 }
7735 if (active == WAIT_OBJECT_0 + 1
7736 && !GetOverlappedResult (hnd, ovl, (DWORD*) &nchars, TRUE))
7737 {
7738 errno = EIO;
7739 return -1;
7740 }
7741 }
7742 }
7d701334 7743 else if (fd < MAXDESC && fd_info[fd].flags & FILE_SOCKET)
480b0c5b 7744 {
30a32e0e 7745 unsigned long nblock = 0;
1088b922 7746 if (winsock_lib == NULL) emacs_abort ();
30a32e0e
JR		 7747
7748 /* TODO: implement select() properly so non-blocking I/O works. */
7749 /* For now, make sure the write blocks. */
7750 if (fd_info[fd].flags & FILE_NDELAY)
7751 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
7752
480b0c5b 7753 nchars = pfn_send (SOCK_HANDLE (fd), buffer, count, 0);
30a32e0e
JR		 7754
7755 /* Set the socket back to non-blocking if it was before,
7756 for other operations that support it. */
7757 if (fd_info[fd].flags & FILE_NDELAY)
7758 {
7759 nblock = 1;
7760 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
7761 }
7762
480b0c5b
GV		 7763 if (nchars == SOCKET_ERROR)
7764 {
ed3751c8
JB		 7765 DebPrint (("sys_write.send failed with error %d on socket %ld\n",
7766 pfn_WSAGetLastError (), SOCK_HANDLE (fd)));
480b0c5b
GV		 7767 set_errno ();
7768 }
7769 }
7770 else
6e83d800
EZ		 7771 {
7772 /* Some networked filesystems don't like too large writes, so
7773 break them into smaller chunks. See the Comments section of
7774 the MSDN documentation of WriteFile for details behind the
7775 choice of the value of CHUNK below. See also the thread
7776 http://thread.gmane.org/gmane.comp.version-control.git/145294
7777 in the git mailing list. */
7778 const unsigned char *p = buffer;
7779 const unsigned chunk = 30 * 1024 * 1024;
7780
7781 nchars = 0;
7782 while (count > 0)
7783 {
7784 unsigned this_chunk = count < chunk ? count : chunk;
7785 int n = _write (fd, p, this_chunk);
7786
7787 nchars += n;
7788 if (n < 0)
7789 {
7790 nchars = n;
7791 break;
7792 }
7793 else if (n < this_chunk)
7794 break;
7795 count -= n;
7796 p += n;
7797 }
7798 }
480b0c5b
GV		 7799
7800 return nchars;
7801}
7802
3dffe395
EZ		 7803\f
7804/* Emulation of SIOCGIFCONF and getifaddrs, see process.c. */
7805
7806extern Lisp_Object conv_sockaddr_to_lisp (struct sockaddr *, int);
7807
7808/* Return information about network interface IFNAME, or about all
7809 interfaces (if IFNAME is nil). */
7810static Lisp_Object
7811network_interface_get_info (Lisp_Object ifname)
7812{
7813 ULONG ainfo_len = sizeof (IP_ADAPTER_INFO);
7814 IP_ADAPTER_INFO *adapter, *ainfo = xmalloc (ainfo_len);
7815 DWORD retval = get_adapters_info (ainfo, &ainfo_len);
7816 Lisp_Object res = Qnil;
7817
7818 if (retval == ERROR_BUFFER_OVERFLOW)
7819 {
7820 ainfo = xrealloc (ainfo, ainfo_len);
7821 retval = get_adapters_info (ainfo, &ainfo_len);
7822 }
7823
7824 if (retval == ERROR_SUCCESS)
7825 {
7826 int eth_count = 0, tr_count = 0, fddi_count = 0, ppp_count = 0;
7827 int sl_count = 0, wlan_count = 0, lo_count = 0, ifx_count = 0;
7828 int if_num;
7829 struct sockaddr_in sa;
7830
7831 /* For the below, we need some winsock functions, so make sure
7832 the winsock DLL is loaded. If we cannot successfully load
7833 it, they will have no use of the information we provide,
7834 anyway, so punt. */
7835 if (!winsock_lib && !init_winsock (1))
7836 goto done;
7837
7838 for (adapter = ainfo; adapter; adapter = adapter->Next)
7839 {
7840 char namebuf[MAX_ADAPTER_NAME_LENGTH + 4];
7841 u_long ip_addr;
7842 /* Present Unix-compatible interface names, instead of the
7843 Windows names, which are really GUIDs not readable by
7844 humans. */
7845 static const char *ifmt[] = {
7846 "eth%d", "tr%d", "fddi%d", "ppp%d", "sl%d", "wlan%d",
7847 "lo", "ifx%d"
7848 };
7849 enum {
7850 NONE = -1,
7851 ETHERNET = 0,
7852 TOKENRING = 1,
7853 FDDI = 2,
7854 PPP = 3,
7855 SLIP = 4,
7856 WLAN = 5,
7857 LOOPBACK = 6,
7858 OTHER_IF = 7
7859 } ifmt_idx;
7860
7861 switch (adapter->Type)
7862 {
7863 case MIB_IF_TYPE_ETHERNET:
7864 /* Windows before Vista reports wireless adapters as
7865 Ethernet. Work around by looking at the Description
7866 string. */
7867 if (strstr (adapter->Description, "Wireless "))
7868 {
7869 ifmt_idx = WLAN;
7870 if_num = wlan_count++;
7871 }
7872 else
7873 {
7874 ifmt_idx = ETHERNET;
7875 if_num = eth_count++;
7876 }
7877 break;
7878 case MIB_IF_TYPE_TOKENRING:
7879 ifmt_idx = TOKENRING;
7880 if_num = tr_count++;
7881 break;
7882 case MIB_IF_TYPE_FDDI:
7883 ifmt_idx = FDDI;
7884 if_num = fddi_count++;
7885 break;
7886 case MIB_IF_TYPE_PPP:
7887 ifmt_idx = PPP;
7888 if_num = ppp_count++;
7889 break;
7890 case MIB_IF_TYPE_SLIP:
7891 ifmt_idx = SLIP;
7892 if_num = sl_count++;
7893 break;
7894 case IF_TYPE_IEEE80211:
7895 ifmt_idx = WLAN;
7896 if_num = wlan_count++;
7897 break;
7898 case MIB_IF_TYPE_LOOPBACK:
7899 if (lo_count < 0)
7900 {
7901 ifmt_idx = LOOPBACK;
7902 if_num = lo_count++;
7903 }
7904 else
7905 ifmt_idx = NONE;
7906 break;
7907 default:
7908 ifmt_idx = OTHER_IF;
7909 if_num = ifx_count++;
7910 break;
7911 }
7912 if (ifmt_idx == NONE)
7913 continue;
7914 sprintf (namebuf, ifmt[ifmt_idx], if_num);
7915
7916 sa.sin_family = AF_INET;
7917 ip_addr = sys_inet_addr (adapter->IpAddressList.IpAddress.String);
7918 if (ip_addr == INADDR_NONE)
7919 {
7920 /* Bogus address, skip this interface. */
7921 continue;
7922 }
7923 sa.sin_addr.s_addr = ip_addr;
7924 sa.sin_port = 0;
7925 if (NILP (ifname))
7926 res = Fcons (Fcons (build_string (namebuf),
7927 conv_sockaddr_to_lisp ((struct sockaddr*) &sa,
7928 sizeof (struct sockaddr))),
7929 res);
7930 else if (strcmp (namebuf, SSDATA (ifname)) == 0)
7931 {
7932 Lisp_Object hwaddr = Fmake_vector (make_number (6), Qnil);
7933 register struct Lisp_Vector *p = XVECTOR (hwaddr);
7934 Lisp_Object flags = Qnil;
7935 int n;
7936 u_long net_mask;
7937
7938 /* Flags. We guess most of them by type, since the
7939 Windows flags are different and hard to get by. */
7940 flags = Fcons (intern ("up"), flags);
7941 if (ifmt_idx == ETHERNET || ifmt_idx == WLAN)
7942 {
7943 flags = Fcons (intern ("broadcast"), flags);
7944 flags = Fcons (intern ("multicast"), flags);
7945 }
7946 flags = Fcons (intern ("running"), flags);
7947 if (ifmt_idx == PPP)
7948 {
7949 flags = Fcons (intern ("pointopoint"), flags);
7950 flags = Fcons (intern ("noarp"), flags);
7951 }
7952 if (adapter->HaveWins)
7953 flags = Fcons (intern ("WINS"), flags);
7954 if (adapter->DhcpEnabled)
7955 flags = Fcons (intern ("dynamic"), flags);
7956
7957 res = Fcons (flags, res);
7958
7959 /* Hardware address and its family. */
7960 for (n = 0; n < adapter->AddressLength; n++)
7961 p->u.contents[n] = make_number ((int) adapter->Address[n]);
7962 /* Windows does not support AF_LINK or AF_PACKET family
7963 of addresses. Use an arbitrary family number that is
7964 identical to what GNU/Linux returns. */
7965 res = Fcons (Fcons (make_number (1), hwaddr), res);
7966
7967 /* Network mask. */
7968 sa.sin_family = AF_INET;
7969 net_mask = sys_inet_addr (adapter->IpAddressList.IpMask.String);
7970 if (net_mask != INADDR_NONE)
7971 {
7972 sa.sin_addr.s_addr = net_mask;
7973 sa.sin_port = 0;
7974 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
7975 sizeof (struct sockaddr)),
7976 res);
7977 }
7978 else
7979 res = Fcons (Qnil, res);
7980
7981 sa.sin_family = AF_INET;
7982 if (ip_addr != INADDR_NONE)
7983 {
7984 /* Broadcast address is only reported by
7985 GetAdaptersAddresses, which is of limited
7986 availability. Generate it on our own. */
7987 u_long bcast_addr = (ip_addr & net_mask) | ~net_mask;
7988
7989 sa.sin_addr.s_addr = bcast_addr;
7990 sa.sin_port = 0;
7991 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
7992 sizeof (struct sockaddr)),
7993 res);
7994
7995 /* IP address. */
7996 sa.sin_addr.s_addr = ip_addr;
7997 sa.sin_port = 0;
7998 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
7999 sizeof (struct sockaddr)),
8000 res);
8001 }
8002 else
8003 res = Fcons (Qnil, Fcons (Qnil, res));
8004 }
8005 }
8006 /* GetAdaptersInfo is documented to not report loopback
8007 interfaces, so we generate one out of thin air. */
8008 if (!lo_count)
8009 {
8010 sa.sin_family = AF_INET;
8011 sa.sin_port = 0;
8012 if (NILP (ifname))
8013 {
8014 sa.sin_addr.s_addr = sys_inet_addr ("127.0.0.1");
8015 res = Fcons (Fcons (build_string ("lo"),
8016 conv_sockaddr_to_lisp ((struct sockaddr*) &sa,
8017 sizeof (struct sockaddr))),
8018 res);
8019 }
8020 else if (strcmp (SSDATA (ifname), "lo") == 0)
8021 {
8022 res = Fcons (Fcons (intern ("running"),
8023 Fcons (intern ("loopback"),
8024 Fcons (intern ("up"), Qnil))), Qnil);
8025 /* 772 is what 3 different GNU/Linux systems report for
8026 the loopback interface. */
8027 res = Fcons (Fcons (make_number (772),
8028 Fmake_vector (make_number (6),
8029 make_number (0))),
8030 res);
8031 sa.sin_addr.s_addr = sys_inet_addr ("255.0.0.0");
8032 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
8033 sizeof (struct sockaddr)),
8034 res);
8035 sa.sin_addr.s_addr = sys_inet_addr ("0.0.0.0");
8036 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
8037 sizeof (struct sockaddr)),
8038 res);
8039 sa.sin_addr.s_addr = sys_inet_addr ("127.0.0.1");
8040 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
8041 sizeof (struct sockaddr)),
8042 res);
8043 }
8044
8045 }
8046 }
8047
8048 done:
8049 xfree (ainfo);
8050 return res;
8051}
8052
8053Lisp_Object
8054network_interface_list (void)
8055{
8056 return network_interface_get_info (Qnil);
8057}
8058
8059Lisp_Object
8060network_interface_info (Lisp_Object ifname)
8061{
8062 return network_interface_get_info (ifname);
8063}
8064
8065\f
97a93095
EZ		 8066/* The Windows CRT functions are "optimized for speed", so they don't
8067 check for timezone and DST changes if they were last called less
8068 than 1 minute ago (see http://support.microsoft.com/kb/821231). So
8069 all Emacs features that repeatedly call time functions (e.g.,
8070 display-time) are in real danger of missing timezone and DST
8071 changes. Calling tzset before each localtime call fixes that. */
8072struct tm *
8073sys_localtime (const time_t *t)
8074{
8075 tzset ();
8076 return localtime (t);
8077}
8078
0898ca10
JB		 8079
8080\f
d07ff9db
CY		 8081/* Try loading LIBRARY_ID from the file(s) specified in
8082 Vdynamic_library_alist. If the library is loaded successfully,
8083 return the handle of the DLL, and record the filename in the
8084 property :loaded-from of LIBRARY_ID. If the library could not be
8085 found, or when it was already loaded (because the handle is not
8086 recorded anywhere, and so is lost after use), return NULL.
8087
8088 We could also save the handle in :loaded-from, but currently
8089 there's no use case for it. */
0898ca10 8090HMODULE
d07ff9db 8091w32_delayed_load (Lisp_Object library_id)
0898ca10
JB		 8092{
8093 HMODULE library_dll = NULL;
8094
8095 CHECK_SYMBOL (library_id);
8096
d07ff9db
CY		 8097 if (CONSP (Vdynamic_library_alist)
8098 && NILP (Fassq (library_id, Vlibrary_cache)))
0898ca10
JB		 8099 {
8100 Lisp_Object found = Qnil;
d07ff9db 8101 Lisp_Object dlls = Fassq (library_id, Vdynamic_library_alist);
0898ca10
JB		 8102
8103 if (CONSP (dlls))
8104 for (dlls = XCDR (dlls); CONSP (dlls); dlls = XCDR (dlls))
8105 {
8106 CHECK_STRING_CAR (dlls);
657d08d3 8107 if ((library_dll = LoadLibrary (SDATA (XCAR (dlls)))))
0898ca10 8108 {
2a8ce227
JB		 8109 char name[MAX_PATH];
8110 DWORD len;
8111
8112 len = GetModuleFileNameA (library_dll, name, sizeof (name));
8113 found = Fcons (XCAR (dlls),
8114 (len > 0)
8115 /* Possibly truncated */
8116 ? make_specified_string (name, -1, len, 1)
8117 : Qnil);
0898ca10
JB		 8118 break;
8119 }
8120 }
8121
8122 Fput (library_id, QCloaded_from, found);
8123 }
8124
8125 return library_dll;
8126}
8127
8128\f
76151e2c 8129void
b56ceb92 8130check_windows_init_file (void)
f52eb3ef 8131{
f52eb3ef
GV		 8132 /* A common indication that Emacs is not installed properly is when
8133 it cannot find the Windows installation file. If this file does
8134 not exist in the expected place, tell the user. */
8135
c7aa8333
EZ		 8136 if (!noninteractive && !inhibit_window_system
8137 /* Vload_path is not yet initialized when we are loading
8138 loadup.el. */
8139 && NILP (Vpurify_flag))
d54abccd 8140 {
d54abccd
GV		 8141 Lisp_Object init_file;
8142 int fd;
f52eb3ef 8143
d54abccd 8144 init_file = build_string ("term/w32-win");
76151e2c 8145 fd = openp (Vload_path, init_file, Fget_load_suffixes (), NULL, Qnil);
177c0ea7 8146 if (fd < 0)
d54abccd 8147 {
76151e2c 8148 Lisp_Object load_path_print = Fprin1_to_string (Vload_path, Qnil);
d5db4077
KR		 8149 char *init_file_name = SDATA (init_file);
8150 char *load_path = SDATA (load_path_print);
acc23b87
KS		 8151 char *buffer = alloca (1024
8152 + strlen (init_file_name)
8153 + strlen (load_path));
d54abccd 8154
177c0ea7 8155 sprintf (buffer,
d54abccd
GV		 8156 "The Emacs Windows initialization file \"%s.el\" "
8157 "could not be found in your Emacs installation. "
8158 "Emacs checked the following directories for this file:\n"
8159 "\n%s\n\n"
8160 "When Emacs cannot find this file, it usually means that it "
8161 "was not installed properly, or its distribution file was "
8162 "not unpacked properly.\nSee the README.W32 file in the "
8163 "top-level Emacs directory for more information.",
8164 init_file_name, load_path);
8165 MessageBox (NULL,
8166 buffer,
8167 "Emacs Abort Dialog",
8168 MB_OK | MB_ICONEXCLAMATION | MB_TASKMODAL);
1088b922 8169 /* Use the low-level system abort. */
d54abccd
GV		 8170 abort ();
8171 }
8172 else
8173 {
a302c7ae 8174 _close (fd);
d54abccd 8175 }
f52eb3ef 8176 }
f52eb3ef 8177}
480b0c5b
GV		 8178
8179void
16b22fef 8180term_ntproc (int ignored)
480b0c5b 8181{
16b22fef 8182 (void)ignored;
c06c382a
EZ		 8183
8184 term_timers ();
8185
480b0c5b
GV		 8186 /* shutdown the socket interface if necessary */
8187 term_winsock ();
52c7f9ee
JR		 8188
8189 term_w32select ();
480b0c5b
GV		 8190}
8191
8192void
16b22fef 8193init_ntproc (int dumping)
480b0c5b 8194{
c06c382a
EZ		 8195 sigset_t initial_mask = 0;
8196
e1dbe924 8197 /* Initialize the socket interface now if available and requested by
f249a012 8198 the user by defining PRELOAD_WINSOCK; otherwise loading will be
fbd6baed 8199 delayed until open-network-stream is called (w32-has-winsock can
f249a012
RS		 8200 also be used to dynamically load or reload winsock).
8201
8202 Conveniently, init_environment is called before us, so
8203 PRELOAD_WINSOCK can be set in the registry. */
8204
8205 /* Always initialize this correctly. */
8206 winsock_lib = NULL;
8207
8208 if (getenv ("PRELOAD_WINSOCK") != NULL)
8209 init_winsock (TRUE);
480b0c5b
GV		 8210
8211 /* Initial preparation for subprocess support: replace our standard
8212 handles with non-inheritable versions. */
8213 {
8214 HANDLE parent;
8215 HANDLE stdin_save = INVALID_HANDLE_VALUE;
8216 HANDLE stdout_save = INVALID_HANDLE_VALUE;
8217 HANDLE stderr_save = INVALID_HANDLE_VALUE;
8218
8219 parent = GetCurrentProcess ();
8220
8221 /* ignore errors when duplicating and closing; typically the
8222 handles will be invalid when running as a gui program. */
177c0ea7
JB		 8223 DuplicateHandle (parent,
8224 GetStdHandle (STD_INPUT_HANDLE),
480b0c5b 8225 parent,
177c0ea7
JB		 8226 &stdin_save,
8227 0,
8228 FALSE,
480b0c5b 8229 DUPLICATE_SAME_ACCESS);
177c0ea7 8230
480b0c5b
GV		 8231 DuplicateHandle (parent,
8232 GetStdHandle (STD_OUTPUT_HANDLE),
8233 parent,
8234 &stdout_save,
8235 0,
8236 FALSE,
8237 DUPLICATE_SAME_ACCESS);
177c0ea7 8238
480b0c5b
GV		 8239 DuplicateHandle (parent,
8240 GetStdHandle (STD_ERROR_HANDLE),
8241 parent,
8242 &stderr_save,
8243 0,
8244 FALSE,
8245 DUPLICATE_SAME_ACCESS);
177c0ea7 8246
480b0c5b
GV		 8247 fclose (stdin);
8248 fclose (stdout);
8249 fclose (stderr);
8250
8251 if (stdin_save != INVALID_HANDLE_VALUE)
62aba0d4 8252 _open_osfhandle ((intptr_t) stdin_save, O_TEXT);
480b0c5b 8253 else
76b3903d
GV		 8254 _open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY);
8255 _fdopen (0, "r");
480b0c5b
GV		 8256
8257 if (stdout_save != INVALID_HANDLE_VALUE)
62aba0d4 8258 _open_osfhandle ((intptr_t) stdout_save, O_TEXT);
480b0c5b 8259 else
76b3903d
GV		 8260 _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY);
8261 _fdopen (1, "w");
480b0c5b
GV		 8262
8263 if (stderr_save != INVALID_HANDLE_VALUE)
62aba0d4 8264 _open_osfhandle ((intptr_t) stderr_save, O_TEXT);
480b0c5b 8265 else
76b3903d
GV		 8266 _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY);
8267 _fdopen (2, "w");
480b0c5b
GV		 8268 }
8269
8270 /* unfortunately, atexit depends on implementation of malloc */
8271 /* atexit (term_ntproc); */
16b22fef 8272 if (!dumping)
c06c382a
EZ		 8273 {
8274 /* Make sure we start with all signals unblocked. */
8275 sigprocmask (SIG_SETMASK, &initial_mask, NULL);
8276 signal (SIGABRT, term_ntproc);
8277 }
8278 init_timers ();
76b3903d
GV		 8279
8280 /* determine which drives are fixed, for GetCachedVolumeInformation */
8281 {
8282 /* GetDriveType must have trailing backslash. */
8283 char drive[] = "A:\\";
8284
8285 /* Loop over all possible drive letters */
8286 while (*drive <= 'Z')
8287 {
8288 /* Record if this drive letter refers to a fixed drive. */
177c0ea7 8289 fixed_drives[DRIVE_INDEX (*drive)] =
76b3903d
GV		 8290 (GetDriveType (drive) == DRIVE_FIXED);
8291
8292 (*drive)++;
8293 }
a302c7ae
AI		 8294
8295 /* Reset the volume info cache. */
8296 volume_cache = NULL;
76b3903d 8297 }
480b0c5b
GV		 8298}
8299
a8c3a596
JR		 8300/*
8301 shutdown_handler ensures that buffers' autosave files are
8302 up to date when the user logs off, or the system shuts down.
8303*/
bedf4aab 8304static BOOL WINAPI
ed3751c8 8305shutdown_handler (DWORD type)
a8c3a596
JR		 8306{
8307 /* Ctrl-C and Ctrl-Break are already suppressed, so don't handle them. */
8308 if (type == CTRL_CLOSE_EVENT /* User closes console window. */
8309 || type == CTRL_LOGOFF_EVENT /* User logs off. */
8310 || type == CTRL_SHUTDOWN_EVENT) /* User shutsdown. */
8311 {
8312 /* Shut down cleanly, making sure autosave files are up to date. */
1882aa38 8313 shut_down_emacs (0, Qnil);
a8c3a596
JR		 8314 }
8315
7046f191 8316 /* Allow other handlers to handle this signal. */
a8c3a596
JR		 8317 return FALSE;
8318}
8319
9785d95b
BK		 8320/*
8321 globals_of_w32 is used to initialize those global variables that
8322 must always be initialized on startup even when the global variable
8323 initialized is non zero (see the function main in emacs.c).
8324*/
9bfb11f9 8325void
b56ceb92 8326globals_of_w32 (void)
9785d95b 8327{
74258518
JR		 8328 HMODULE kernel32 = GetModuleHandle ("kernel32.dll");
8329
8330 get_process_times_fn = (GetProcessTimes_Proc)
8331 GetProcAddress (kernel32, "GetProcessTimes");
8332
cd3520a4 8333 DEFSYM (QCloaded_from, ":loaded-from");
0898ca10 8334
9785d95b
BK		 8335 g_b_init_is_windows_9x = 0;
8336 g_b_init_open_process_token = 0;
8337 g_b_init_get_token_information = 0;
8338 g_b_init_lookup_account_sid = 0;
9d95a291
EZ		 8339 g_b_init_get_sid_sub_authority = 0;
8340 g_b_init_get_sid_sub_authority_count = 0;
6dad7178 8341 g_b_init_get_security_info = 0;
8aaaec6b
EZ		 8342 g_b_init_get_file_security = 0;
8343 g_b_init_get_security_descriptor_owner = 0;
8344 g_b_init_get_security_descriptor_group = 0;
8345 g_b_init_is_valid_sid = 0;
7c80d5ec
EZ		 8346 g_b_init_create_toolhelp32_snapshot = 0;
8347 g_b_init_process32_first = 0;
8348 g_b_init_process32_next = 0;
8349 g_b_init_open_thread_token = 0;
8350 g_b_init_impersonate_self = 0;
8351 g_b_init_revert_to_self = 0;
8352 g_b_init_get_process_memory_info = 0;
8353 g_b_init_get_process_working_set_size = 0;
8354 g_b_init_global_memory_status = 0;
8355 g_b_init_global_memory_status_ex = 0;
f8b35b24
EZ		 8356 g_b_init_equal_sid = 0;
8357 g_b_init_copy_sid = 0;
8358 g_b_init_get_length_sid = 0;
ad9e2d54
EZ		 8359 g_b_init_get_native_system_info = 0;
8360 g_b_init_get_system_times = 0;
6dad7178 8361 g_b_init_create_symbolic_link = 0;
66447e07
EZ		 8362 g_b_init_get_security_descriptor_dacl = 0;
8363 g_b_init_convert_sd_to_sddl = 0;
8364 g_b_init_convert_sddl_to_sd = 0;
8365 g_b_init_is_valid_security_descriptor = 0;
8366 g_b_init_set_file_security = 0;
3dffe395 8367 g_b_init_get_adapters_info = 0;
ad9e2d54 8368 num_of_processors = 0;
a8c3a596
JR		 8369 /* The following sets a handler for shutdown notifications for
8370 console apps. This actually applies to Emacs in both console and
8371 GUI modes, since we had to fool windows into thinking emacs is a
8372 console application to get console mode to work. */
ed3751c8 8373 SetConsoleCtrlHandler (shutdown_handler, TRUE);
8aaaec6b
EZ		 8374
8375 /* "None" is the default group name on standalone workstations. */
8376 strcpy (dflt_group_name, "None");
5c207910
EZ		 8377
8378 /* Reset, in case it has some value inherited from dump time. */
8379 w32_stat_get_owner_group = 0;
03d58cca
EZ		 8380
8381 /* If w32_unicode_filenames is non-zero, we will be using Unicode
8382 (a.k.a. "wide") APIs to invoke functions that accept file
8383 names. */
8384 if (is_windows_9x ())
8385 w32_unicode_filenames = 0;
8386 else
8387 w32_unicode_filenames = 1;
9785d95b
BK		 8388}
8389
d888760c 8390/* For make-serial-process */
b56ceb92 8391int
4e604a5d 8392serial_open (Lisp_Object port_obj)
d888760c 8393{
4e604a5d 8394 char *port = SSDATA (port_obj);
d888760c
GM		 8395 HANDLE hnd;
8396 child_process *cp;
8397 int fd = -1;
8398
8399 hnd = CreateFile (port, GENERIC_READ | GENERIC_WRITE, 0, 0,
8400 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
8401 if (hnd == INVALID_HANDLE_VALUE)
8402 error ("Could not open %s", port);
62aba0d4 8403 fd = (int) _open_osfhandle ((intptr_t) hnd, 0);
d888760c
GM		 8404 if (fd == -1)
8405 error ("Could not open %s", port);
8406
8407 cp = new_child ();
8408 if (!cp)
8409 error ("Could not create child process");
8410 cp->fd = fd;
8411 cp->status = STATUS_READ_ACKNOWLEDGED;
8412 fd_info[ fd ].hnd = hnd;
8413 fd_info[ fd ].flags |=
8414 FILE_READ | FILE_WRITE | FILE_BINARY | FILE_SERIAL;
8415 if (fd_info[ fd ].cp != NULL)
8416 {
8417 error ("fd_info[fd = %d] is already in use", fd);
8418 }
8419 fd_info[ fd ].cp = cp;
8420 cp->ovl_read.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL);
8421 if (cp->ovl_read.hEvent == NULL)
8422 error ("Could not create read event");
8423 cp->ovl_write.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL);
8424 if (cp->ovl_write.hEvent == NULL)
8425 error ("Could not create write event");
8426
8427 return fd;
8428}
8429
8430/* For serial-process-configure */
8431void
9d4f32e8 8432serial_configure (struct Lisp_Process *p, Lisp_Object contact)
d888760c
GM		 8433{
8434 Lisp_Object childp2 = Qnil;
8435 Lisp_Object tem = Qnil;
8436 HANDLE hnd;
8437 DCB dcb;
8438 COMMTIMEOUTS ct;
8439 char summary[4] = "???"; /* This usually becomes "8N1". */
8440
8441 if ((fd_info[ p->outfd ].flags & FILE_SERIAL) == 0)
8442 error ("Not a serial process");
8443 hnd = fd_info[ p->outfd ].hnd;
8444
4d2b044c 8445 childp2 = Fcopy_sequence (p->childp);
d888760c
GM		 8446
8447 /* Initialize timeouts for blocking read and blocking write. */
8448 if (!GetCommTimeouts (hnd, &ct))
8449 error ("GetCommTimeouts() failed");
8450 ct.ReadIntervalTimeout = 0;
8451 ct.ReadTotalTimeoutMultiplier = 0;
8452 ct.ReadTotalTimeoutConstant = 0;
8453 ct.WriteTotalTimeoutMultiplier = 0;
8454 ct.WriteTotalTimeoutConstant = 0;
8455 if (!SetCommTimeouts (hnd, &ct))
8456 error ("SetCommTimeouts() failed");
8457 /* Read port attributes and prepare default configuration. */
8458 memset (&dcb, 0, sizeof (dcb));
8459 dcb.DCBlength = sizeof (DCB);
8460 if (!GetCommState (hnd, &dcb))
8461 error ("GetCommState() failed");
8462 dcb.fBinary = TRUE;
8463 dcb.fNull = FALSE;
8464 dcb.fAbortOnError = FALSE;
8465 /* dcb.XonLim and dcb.XoffLim are set by GetCommState() */
8466 dcb.ErrorChar = 0;
8467 dcb.EofChar = 0;
8468 dcb.EvtChar = 0;
8469
8470 /* Configure speed. */
8471 if (!NILP (Fplist_member (contact, QCspeed)))
8472 tem = Fplist_get (contact, QCspeed);
8473 else
4d2b044c 8474 tem = Fplist_get (p->childp, QCspeed);
d888760c
GM		 8475 CHECK_NUMBER (tem);
8476 dcb.BaudRate = XINT (tem);
8477 childp2 = Fplist_put (childp2, QCspeed, tem);
8478
8479 /* Configure bytesize. */
8480 if (!NILP (Fplist_member (contact, QCbytesize)))
8481 tem = Fplist_get (contact, QCbytesize);
8482 else
4d2b044c 8483 tem = Fplist_get (p->childp, QCbytesize);
d888760c
GM		 8484 if (NILP (tem))
8485 tem = make_number (8);
8486 CHECK_NUMBER (tem);
8487 if (XINT (tem) != 7 && XINT (tem) != 8)
8488 error (":bytesize must be nil (8), 7, or 8");
8489 dcb.ByteSize = XINT (tem);
8490 summary[0] = XINT (tem) + '0';
8491 childp2 = Fplist_put (childp2, QCbytesize, tem);
8492
8493 /* Configure parity. */
8494 if (!NILP (Fplist_member (contact, QCparity)))
8495 tem = Fplist_get (contact, QCparity);
8496 else
4d2b044c 8497 tem = Fplist_get (p->childp, QCparity);
d888760c
GM		 8498 if (!NILP (tem) && !EQ (tem, Qeven) && !EQ (tem, Qodd))
8499 error (":parity must be nil (no parity), `even', or `odd'");
8500 dcb.fParity = FALSE;
8501 dcb.Parity = NOPARITY;
8502 dcb.fErrorChar = FALSE;
8503 if (NILP (tem))
8504 {
8505 summary[1] = 'N';
8506 }
8507 else if (EQ (tem, Qeven))
8508 {
8509 summary[1] = 'E';
8510 dcb.fParity = TRUE;
8511 dcb.Parity = EVENPARITY;
8512 dcb.fErrorChar = TRUE;
8513 }
8514 else if (EQ (tem, Qodd))
8515 {
8516 summary[1] = 'O';
8517 dcb.fParity = TRUE;
8518 dcb.Parity = ODDPARITY;
8519 dcb.fErrorChar = TRUE;
8520 }
8521 childp2 = Fplist_put (childp2, QCparity, tem);
8522
8523 /* Configure stopbits. */
8524 if (!NILP (Fplist_member (contact, QCstopbits)))
8525 tem = Fplist_get (contact, QCstopbits);
8526 else
4d2b044c 8527 tem = Fplist_get (p->childp, QCstopbits);
d888760c
GM		 8528 if (NILP (tem))
8529 tem = make_number (1);
8530 CHECK_NUMBER (tem);
8531 if (XINT (tem) != 1 && XINT (tem) != 2)
8532 error (":stopbits must be nil (1 stopbit), 1, or 2");
8533 summary[2] = XINT (tem) + '0';
8534 if (XINT (tem) == 1)
8535 dcb.StopBits = ONESTOPBIT;
8536 else if (XINT (tem) == 2)
8537 dcb.StopBits = TWOSTOPBITS;
8538 childp2 = Fplist_put (childp2, QCstopbits, tem);
8539
8540 /* Configure flowcontrol. */
8541 if (!NILP (Fplist_member (contact, QCflowcontrol)))
8542 tem = Fplist_get (contact, QCflowcontrol);
8543 else
4d2b044c 8544 tem = Fplist_get (p->childp, QCflowcontrol);
d888760c
GM		 8545 if (!NILP (tem) && !EQ (tem, Qhw) && !EQ (tem, Qsw))
8546 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
8547 dcb.fOutxCtsFlow = FALSE;
8548 dcb.fOutxDsrFlow = FALSE;
8549 dcb.fDtrControl = DTR_CONTROL_DISABLE;
8550 dcb.fDsrSensitivity = FALSE;
8551 dcb.fTXContinueOnXoff = FALSE;
8552 dcb.fOutX = FALSE;
8553 dcb.fInX = FALSE;
8554 dcb.fRtsControl = RTS_CONTROL_DISABLE;
8555 dcb.XonChar = 17; /* Control-Q */
8556 dcb.XoffChar = 19; /* Control-S */
8557 if (NILP (tem))
8558 {
8559 /* Already configured. */
8560 }
8561 else if (EQ (tem, Qhw))
8562 {
8563 dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
8564 dcb.fOutxCtsFlow = TRUE;
8565 }
8566 else if (EQ (tem, Qsw))
8567 {
8568 dcb.fOutX = TRUE;
8569 dcb.fInX = TRUE;
8570 }
8571 childp2 = Fplist_put (childp2, QCflowcontrol, tem);
8572
8573 /* Activate configuration. */
8574 if (!SetCommState (hnd, &dcb))
8575 error ("SetCommState() failed");
8576
8577 childp2 = Fplist_put (childp2, QCsummary, build_string (summary));
6a09a33b 8578 pset_childp (p, childp2);
d888760c
GM		 8579}
8580
e061a11b
TZ		 8581#ifdef HAVE_GNUTLS
8582
8583ssize_t
8584emacs_gnutls_pull (gnutls_transport_ptr_t p, void* buf, size_t sz)
8585{
d78cf5ed 8586 int n, err;
e061a11b 8587 SELECT_TYPE fdset;
43aac990 8588 struct timespec timeout;
e061a11b
TZ		 8589 struct Lisp_Process *process = (struct Lisp_Process *)p;
8590 int fd = process->infd;
8591
d78cf5ed 8592 n = sys_read (fd, (char*)buf, sz);
e061a11b 8593
d78cf5ed
CB		 8594 if (n >= 0)
8595 return n;
e061a11b 8596
d78cf5ed 8597 err = errno;
e061a11b 8598
d78cf5ed
CB		 8599 /* Translate the WSAEWOULDBLOCK alias EWOULDBLOCK to EAGAIN. */
8600 if (err == EWOULDBLOCK)
8601 err = EAGAIN;
e061a11b 8602
d78cf5ed 8603 emacs_gnutls_transport_set_errno (process->gnutls_state, err);
e061a11b 8604
d78cf5ed 8605 return -1;
e061a11b 8606}
ab5796a9 8607
e061a11b
TZ		 8608ssize_t
8609emacs_gnutls_push (gnutls_transport_ptr_t p, const void* buf, size_t sz)
8610{
8611 struct Lisp_Process *process = (struct Lisp_Process *)p;
42ce4c63 8612 int fd = process->outfd;
5e617bc2 8613 ssize_t n = sys_write (fd, buf, sz);
e061a11b
TZ		 8614
8615 /* 0 or more bytes written means everything went fine. */
8616 if (n >= 0)
8617 return n;
8618
8619 /* Negative bytes written means we got an error in errno.
8620 Translate the WSAEWOULDBLOCK alias EWOULDBLOCK to EAGAIN. */
0898ca10
JB		 8621 emacs_gnutls_transport_set_errno (process->gnutls_state,
8622 errno == EWOULDBLOCK ? EAGAIN : errno);
e061a11b
TZ		 8623
8624 return -1;
8625}
8626#endif /* HAVE_GNUTLS */
8627
8628/* end of w32.c */
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