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sys_link works, including enhanced error handling.
[bpt/emacs.git] / src / w32.c
CommitLineData
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{
fbd6baed 3734 return _mkdir (map_w32_filename (path, NULL));
480b0c5b
GV		 3735}
3736
63f5c6c2
EZ		 3737int
3738sys_open (const char * path, int oflag, int mode)
3739{
3740 const char* mpath = map_w32_filename (path, NULL);
3741 int res = -1;
3742
3743 /* If possible, try to open file without _O_CREAT, to be able to
3744 write to existing hidden and system files. Force all file
3745 handles to be non-inheritable. */
3746 if ((oflag & (_O_CREAT | _O_EXCL)) != (_O_CREAT | _O_EXCL))
3747 res = _open (mpath, (oflag & ~_O_CREAT) | _O_NOINHERIT, mode);
3748 if (res < 0)
3749 res = _open (mpath, oflag | _O_NOINHERIT, mode);
3750
3751 return res;
3752}
3753
3754/* Implementation of mkostemp for MS-Windows, to avoid race conditions
3755 when using mktemp.
3756
3757 Standard algorithm for generating a temporary file name seems to be
3758 use pid or tid with a letter on the front (in place of the 6 X's)
3759 and cycle through the letters to find a unique name. We extend
3760 that to allow any reasonable character as the first of the 6 X's,
3761 so that the number of simultaneously used temporary files will be
3762 greater. */
3763
3764int
3765mkostemp (char * template, int flags)
480b0c5b 3766{
9d1778b1 3767 char * p;
63f5c6c2 3768 int i, fd = -1;
9d1778b1 3769 unsigned uid = GetCurrentThreadId ();
63f5c6c2 3770 int save_errno = errno;
9d1778b1
RS		 3771 static char first_char[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#";
3772
63f5c6c2 3773 errno = EINVAL;
9d1778b1 3774 if (template == NULL)
63f5c6c2
EZ		 3775 return -1;
3776
9d1778b1
RS		 3777 p = template + strlen (template);
3778 i = 5;
3779 /* replace up to the last 5 X's with uid in decimal */
3780 while (--p >= template && p[0] == 'X' && --i >= 0)
3781 {
3782 p[0] = '0' + uid % 10;
3783 uid /= 10;
3784 }
3785
3786 if (i < 0 && p[0] == 'X')
3787 {
3788 i = 0;
3789 do
3790 {
9d1778b1 3791 p[0] = first_char[i];
63f5c6c2
EZ		 3792 if ((fd = sys_open (template,
3793 flags | _O_CREAT | _O_EXCL | _O_RDWR,
3794 S_IRUSR | S_IWUSR)) >= 0
3795 || errno != EEXIST)
9d1778b1 3796 {
63f5c6c2
EZ		 3797 if (fd >= 0)
3798 errno = save_errno;
3799 return fd;
9d1778b1
RS		 3800 }
3801 }
3802 while (++i < sizeof (first_char));
3803 }
3804
63f5c6c2
EZ		 3805 /* Template is badly formed or else we can't generate a unique name. */
3806 return -1;
480b0c5b
GV		 3807}
3808
3809int
70743157
PE		 3810fchmod (int fd, mode_t mode)
3811{
3812 return 0;
3813}
3814
3815int
3816sys_rename_replace (const char *oldname, const char *newname, BOOL force)
480b0c5b 3817{
cfb5e855 3818 BOOL result;
b3308d2e 3819 char temp[MAX_PATH];
069d2b50
L		 3820 int newname_dev;
3821 int oldname_dev;
480b0c5b 3822
e9e23e23 3823 /* MoveFile on Windows 95 doesn't correctly change the short file name
5162ffce
MB		 3824 alias in a number of circumstances (it is not easy to predict when
3825 just by looking at oldname and newname, unfortunately). In these
3826 cases, renaming through a temporary name avoids the problem.
3827
e9e23e23 3828 A second problem on Windows 95 is that renaming through a temp name when
5162ffce
MB		 3829 newname is uppercase fails (the final long name ends up in
3830 lowercase, although the short alias might be uppercase) UNLESS the
3831 long temp name is not 8.3.
3832
e9e23e23 3833 So, on Windows 95 we always rename through a temp name, and we make sure
5162ffce 3834 the temp name has a long extension to ensure correct renaming. */
480b0c5b 3835
fbd6baed 3836 strcpy (temp, map_w32_filename (oldname, NULL));
480b0c5b 3837
069d2b50
L		 3838 /* volume_info is set indirectly by map_w32_filename. */
3839 oldname_dev = volume_info.serialnum;
3840
417a7a0e 3841 if (os_subtype == OS_9X)
480b0c5b 3842 {
b3308d2e 3843 char * o;
480b0c5b 3844 char * p;
b3308d2e
KH		 3845 int i = 0;
3846
3847 oldname = map_w32_filename (oldname, NULL);
657d08d3 3848 if ((o = strrchr (oldname, '\\')))
b3308d2e
KH		 3849 o++;
3850 else
3851 o = (char *) oldname;
480b0c5b 3852
657d08d3 3853 if ((p = strrchr (temp, '\\')))
480b0c5b
GV		 3854 p++;
3855 else
3856 p = temp;
b3308d2e
KH		 3857
3858 do
3859 {
3860 /* Force temp name to require a manufactured 8.3 alias - this
3861 seems to make the second rename work properly. */
f313ee82 3862 sprintf (p, "_.%s.%u", o, i);
b3308d2e 3863 i++;
58f0cb7e 3864 result = rename (oldname, temp);
b3308d2e
KH		 3865 }
3866 /* This loop must surely terminate! */
cfb5e855 3867 while (result < 0 && errno == EEXIST);
58f0cb7e 3868 if (result < 0)
480b0c5b
GV		 3869 return -1;
3870 }
3871
70743157 3872 /* If FORCE, emulate Unix behavior - newname is deleted if it already exists
5162ffce 3873 (at least if it is a file; don't do this for directories).
76b3903d 3874
b3308d2e
KH		 3875 Since we mustn't do this if we are just changing the case of the
3876 file name (we would end up deleting the file we are trying to
3877 rename!), we let rename detect if the destination file already
3878 exists - that way we avoid the possible pitfalls of trying to
3879 determine ourselves whether two names really refer to the same
3880 file, which is not always possible in the general case. (Consider
3881 all the permutations of shared or subst'd drives, etc.) */
3882
3883 newname = map_w32_filename (newname, NULL);
069d2b50
L		 3884
3885 /* volume_info is set indirectly by map_w32_filename. */
3886 newname_dev = volume_info.serialnum;
3887
eb9ea53f 3888 result = rename (temp, newname);
b3308d2e 3889
70743157 3890 if (result < 0 && force)
069d2b50 3891 {
6dad7178 3892 DWORD w32err = GetLastError ();
069d2b50
L		 3893
3894 if (errno == EACCES
3895 && newname_dev != oldname_dev)
3896 {
3897 /* The implementation of `rename' on Windows does not return
3898 errno = EXDEV when you are moving a directory to a
3899 different storage device (ex. logical disk). It returns
3900 EACCES instead. So here we handle such situations and
3901 return EXDEV. */
3902 DWORD attributes;
3903
3904 if ((attributes = GetFileAttributes (temp)) != -1
6dad7178 3905 && (attributes & FILE_ATTRIBUTE_DIRECTORY))
069d2b50
L		 3906 errno = EXDEV;
3907 }
3908 else if (errno == EEXIST)
3909 {
3910 if (_chmod (newname, 0666) != 0)
3911 return result;
3912 if (_unlink (newname) != 0)
3913 return result;
3914 result = rename (temp, newname);
3915 }
6dad7178
EZ		 3916 else if (w32err == ERROR_PRIVILEGE_NOT_HELD
3917 && is_symlink (temp))
3918 {
3919 /* This is Windows prohibiting the user from creating a
3920 symlink in another place, since that requires
3921 privileges. */
3922 errno = EPERM;
3923 }
069d2b50 3924 }
480b0c5b 3925
eb9ea53f 3926 return result;
480b0c5b
GV		 3927}
3928
70743157
PE		 3929int
3930sys_rename (char const *old, char const *new)
3931{
3932 return sys_rename_replace (old, new, TRUE);
3933}
3934
480b0c5b
GV		 3935int
3936sys_rmdir (const char * path)
3937{
fbd6baed 3938 return _rmdir (map_w32_filename (path, NULL));
480b0c5b
GV		 3939}
3940
3941int
3942sys_unlink (const char * path)
3943{
16bb7578
GV		 3944 path = map_w32_filename (path, NULL);
3945
3946 /* On Unix, unlink works without write permission. */
3947 _chmod (path, 0666);
3948 return _unlink (path);
480b0c5b
GV		 3949}
3950
3951static FILETIME utc_base_ft;
5da9424d 3952static ULONGLONG utc_base; /* In 100ns units */
480b0c5b
GV		 3953static int init = 0;
3954
5da9424d
JB		 3955#define FILETIME_TO_U64(result, ft) \
3956 do { \
3957 ULARGE_INTEGER uiTemp; \
3958 uiTemp.LowPart = (ft).dwLowDateTime; \
3959 uiTemp.HighPart = (ft).dwHighDateTime; \
3960 result = uiTemp.QuadPart; \
3961 } while (0)
3962
3963static void
b56ceb92 3964initialize_utc_base (void)
7c80d5ec 3965{
5da9424d
JB		 3966 /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */
3967 SYSTEMTIME st;
3968
3969 st.wYear = 1970;
3970 st.wMonth = 1;
3971 st.wDay = 1;
3972 st.wHour = 0;
3973 st.wMinute = 0;
3974 st.wSecond = 0;
3975 st.wMilliseconds = 0;
3976
3977 SystemTimeToFileTime (&st, &utc_base_ft);
3978 FILETIME_TO_U64 (utc_base, utc_base_ft);
7c80d5ec
EZ		 3979}
3980
480b0c5b
GV		 3981static time_t
3982convert_time (FILETIME ft)
3983{
5da9424d 3984 ULONGLONG tmp;
480b0c5b
GV		 3985
3986 if (!init)
3987 {
9d4f32e8 3988 initialize_utc_base ();
480b0c5b
GV		 3989 init = 1;
3990 }
3991
3992 if (CompareFileTime (&ft, &utc_base_ft) < 0)
3993 return 0;
3994
5da9424d
JB		 3995 FILETIME_TO_U64 (tmp, ft);
3996 return (time_t) ((tmp - utc_base) / 10000000L);
480b0c5b
GV		 3997}
3998
bedf4aab 3999static void
480b0c5b
GV		 4000convert_from_time_t (time_t time, FILETIME * pft)
4001{
5da9424d 4002 ULARGE_INTEGER tmp;
480b0c5b
GV		 4003
4004 if (!init)
4005 {
5da9424d 4006 initialize_utc_base ();
480b0c5b
GV		 4007 init = 1;
4008 }
4009
4010 /* time in 100ns units since 1-Jan-1601 */
5da9424d
JB		 4011 tmp.QuadPart = (ULONGLONG) time * 10000000L + utc_base;
4012 pft->dwHighDateTime = tmp.HighPart;
4013 pft->dwLowDateTime = tmp.LowPart;
480b0c5b 4014}
480b0c5b 4015
8aaaec6b 4016static PSECURITY_DESCRIPTOR
6dad7178
EZ		 4017get_file_security_desc_by_handle (HANDLE h)
4018{
4019 PSECURITY_DESCRIPTOR psd = NULL;
4020 DWORD err;
4021 SECURITY_INFORMATION si = OWNER_SECURITY_INFORMATION
4022 | GROUP_SECURITY_INFORMATION /* | DACL_SECURITY_INFORMATION */ ;
4023
4024 err = get_security_info (h, SE_FILE_OBJECT, si,
4025 NULL, NULL, NULL, NULL, &psd);
4026 if (err != ERROR_SUCCESS)
4027 return NULL;
4028
4029 return psd;
4030}
4031
4032static PSECURITY_DESCRIPTOR
4033get_file_security_desc_by_name (const char *fname)
8aaaec6b
EZ		 4034{
4035 PSECURITY_DESCRIPTOR psd = NULL;
4036 DWORD sd_len, err;
4037 SECURITY_INFORMATION si = OWNER_SECURITY_INFORMATION
4038 | GROUP_SECURITY_INFORMATION /* | DACL_SECURITY_INFORMATION */ ;
4039
4040 if (!get_file_security (fname, si, psd, 0, &sd_len))
4041 {
4042 err = GetLastError ();
4043 if (err != ERROR_INSUFFICIENT_BUFFER)
4044 return NULL;
4045 }
4046
4047 psd = xmalloc (sd_len);
4048 if (!get_file_security (fname, si, psd, sd_len, &sd_len))
4049 {
4050 xfree (psd);
4051 return NULL;
4052 }
4053
4054 return psd;
4055}
4056
4057static DWORD
4058get_rid (PSID sid)
4059{
4060 unsigned n_subauthorities;
4061
4062 /* Use the last sub-authority value of the RID, the relative
4063 portion of the SID, as user/group ID. */
4064 n_subauthorities = *get_sid_sub_authority_count (sid);
4065 if (n_subauthorities < 1)
4066 return 0; /* the "World" RID */
4067 return *get_sid_sub_authority (sid, n_subauthorities - 1);
4068}
4069
f8b35b24
EZ		 4070/* Caching SID and account values for faster lokup. */
4071
f8b35b24 4072struct w32_id {
22749e9a 4073 unsigned rid;
f8b35b24
EZ		 4074 struct w32_id *next;
4075 char name[GNLEN+1];
4076 unsigned char sid[FLEXIBLE_ARRAY_MEMBER];
4077};
4078
4079static struct w32_id *w32_idlist;
4080
4081static int
22749e9a 4082w32_cached_id (PSID sid, unsigned *id, char *name)
f8b35b24
EZ		 4083{
4084 struct w32_id *tail, *found;
4085
4086 for (found = NULL, tail = w32_idlist; tail; tail = tail->next)
4087 {
4088 if (equal_sid ((PSID)tail->sid, sid))
4089 {
4090 found = tail;
4091 break;
4092 }
4093 }
4094 if (found)
4095 {
4096 *id = found->rid;
4097 strcpy (name, found->name);
4098 return 1;
4099 }
4100 else
4101 return 0;
4102}
4103
4104static void
22749e9a 4105w32_add_to_cache (PSID sid, unsigned id, char *name)
f8b35b24
EZ		 4106{
4107 DWORD sid_len;
4108 struct w32_id *new_entry;
4109
4110 /* We don't want to leave behind stale cache from when Emacs was
4111 dumped. */
4112 if (initialized)
4113 {
4114 sid_len = get_length_sid (sid);
4115 new_entry = xmalloc (offsetof (struct w32_id, sid) + sid_len);
4116 if (new_entry)
4117 {
4118 new_entry->rid = id;
4119 strcpy (new_entry->name, name);
4120 copy_sid (sid_len, (PSID)new_entry->sid, sid);
4121 new_entry->next = w32_idlist;
4122 w32_idlist = new_entry;
4123 }
4124 }
4125}
4126
8aaaec6b
EZ		 4127#define UID 1
4128#define GID 2
4129
4130static int
92340ec7 4131get_name_and_id (PSECURITY_DESCRIPTOR psd, unsigned *id, char *nm, int what)
8aaaec6b
EZ		 4132{
4133 PSID sid = NULL;
8aaaec6b
EZ		 4134 BOOL dflt;
4135 SID_NAME_USE ignore;
4136 char name[UNLEN+1];
4137 DWORD name_len = sizeof (name);
4138 char domain[1024];
ed3751c8 4139 DWORD domain_len = sizeof (domain);
8aaaec6b
EZ		 4140 int use_dflt = 0;
4141 int result;
4142
4143 if (what == UID)
4144 result = get_security_descriptor_owner (psd, &sid, &dflt);
4145 else if (what == GID)
4146 result = get_security_descriptor_group (psd, &sid, &dflt);
4147 else
4148 result = 0;
4149
4150 if (!result || !is_valid_sid (sid))
4151 use_dflt = 1;
f8b35b24 4152 else if (!w32_cached_id (sid, id, nm))
8aaaec6b 4153 {
92340ec7 4154 if (!lookup_account_sid (NULL, sid, name, &name_len,
8aaaec6b
EZ		 4155 domain, &domain_len, &ignore)
4156 || name_len > UNLEN+1)
4157 use_dflt = 1;
4158 else
4159 {
4160 *id = get_rid (sid);
4161 strcpy (nm, name);
f8b35b24 4162 w32_add_to_cache (sid, *id, name);
8aaaec6b
EZ		 4163 }
4164 }
4165 return use_dflt;
4166}
4167
4168static void
92340ec7 4169get_file_owner_and_group (PSECURITY_DESCRIPTOR psd, struct stat *st)
8aaaec6b
EZ		 4170{
4171 int dflt_usr = 0, dflt_grp = 0;
4172
4173 if (!psd)
4174 {
4175 dflt_usr = 1;
4176 dflt_grp = 1;
4177 }
4178 else
4179 {
92340ec7 4180 if (get_name_and_id (psd, &st->st_uid, st->st_uname, UID))
8aaaec6b 4181 dflt_usr = 1;
92340ec7 4182 if (get_name_and_id (psd, &st->st_gid, st->st_gname, GID))
8aaaec6b
EZ		 4183 dflt_grp = 1;
4184 }
4185 /* Consider files to belong to current user/group, if we cannot get
4186 more accurate information. */
4187 if (dflt_usr)
4188 {
4189 st->st_uid = dflt_passwd.pw_uid;
4190 strcpy (st->st_uname, dflt_passwd.pw_name);
4191 }
4192 if (dflt_grp)
4193 {
4194 st->st_gid = dflt_passwd.pw_gid;
4195 strcpy (st->st_gname, dflt_group.gr_name);
4196 }
4197}
4198
be4c6380
EZ		 4199/* Return non-zero if NAME is a potentially slow filesystem. */
4200int
4201is_slow_fs (const char *name)
4202{
4203 char drive_root[4];
4204 UINT devtype;
4205
4206 if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1]))
4207 devtype = DRIVE_REMOTE; /* assume UNC name is remote */
4208 else if (!(strlen (name) >= 2 && IS_DEVICE_SEP (name[1])))
4209 devtype = GetDriveType (NULL); /* use root of current drive */
4210 else
4211 {
4212 /* GetDriveType needs the root directory of the drive. */
4213 strncpy (drive_root, name, 2);
4214 drive_root[2] = '\\';
4215 drive_root[3] = '\0';
4216 devtype = GetDriveType (drive_root);
4217 }
4218 return !(devtype == DRIVE_FIXED || devtype == DRIVE_RAMDISK);
4219}
4220
5c207910
EZ		 4221/* If this is non-zero, the caller wants accurate information about
4222 file's owner and group, which could be expensive to get. */
4223int w32_stat_get_owner_group;
4224
480b0c5b
GV		 4225/* MSVC stat function can't cope with UNC names and has other bugs, so
4226 replace it with our own. This also allows us to calculate consistent
6dad7178
EZ		 4227 inode values and owner/group without hacks in the main Emacs code. */
4228
4229static int
4230stat_worker (const char * path, struct stat * buf, int follow_symlinks)
480b0c5b 4231{
6dad7178 4232 char *name, *save_name, *r;
480b0c5b
GV		 4233 WIN32_FIND_DATA wfd;
4234 HANDLE fh;
6dad7178 4235 unsigned __int64 fake_inode = 0;
480b0c5b
GV		 4236 int permission;
4237 int len;
4238 int rootdir = FALSE;
8aaaec6b 4239 PSECURITY_DESCRIPTOR psd = NULL;
6dad7178
EZ		 4240 int is_a_symlink = 0;
4241 DWORD file_flags = FILE_FLAG_BACKUP_SEMANTICS;
4242 DWORD access_rights = 0;
4243 DWORD fattrs = 0, serialnum = 0, fs_high = 0, fs_low = 0, nlinks = 1;
4244 FILETIME ctime, atime, wtime;
806fed21 4245 int dbcs_p;
480b0c5b
GV		 4246
4247 if (path == NULL || buf == NULL)
4248 {
4249 errno = EFAULT;
4250 return -1;
4251 }
4252
6dad7178 4253 save_name = name = (char *) map_w32_filename (path, &path);
22189f79
EZ		 4254 /* Must be valid filename, no wild cards or other invalid
4255 characters. We use _mbspbrk to support multibyte strings that
4256 might look to strpbrk as if they included literal *, ?, and other
4257 characters mentioned below that are disallowed by Windows
4258 filesystems. */
4259 if (_mbspbrk (name, "*?|<>\""))
480b0c5b
GV		 4260 {
4261 errno = ENOENT;
4262 return -1;
4263 }
4264
4265 /* Remove trailing directory separator, unless name is the root
4266 directory of a drive or UNC volume in which case ensure there
4267 is a trailing separator. */
4268 len = strlen (name);
480b0c5b
GV		 4269 name = strcpy (alloca (len + 2), name);
4270
6dad7178
EZ		 4271 /* Avoid a somewhat costly call to is_symlink if the filesystem
4272 doesn't support symlinks. */
4273 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
4274 is_a_symlink = is_symlink (name);
4275
4276 /* Plan A: Open the file and get all the necessary information via
4277 the resulting handle. This solves several issues in one blow:
4278
4279 . retrieves attributes for the target of a symlink, if needed
4280 . gets attributes of root directories and symlinks pointing to
4281 root directories, thus avoiding the need for special-casing
4282 these and detecting them by examining the file-name format
4283 . retrieves more accurate attributes (e.g., non-zero size for
4284 some directories, esp. directories that are junction points)
4285 . correctly resolves "c:/..", "/.." and similar file names
4286 . avoids run-time penalties for 99% of use cases
4287
4288 Plan A is always tried first, unless the user asked not to (but
4289 if the file is a symlink and we need to follow links, we try Plan
4290 A even if the user asked not to).
4291
4292 If Plan A fails, we go to Plan B (below), where various
4293 potentially expensive techniques must be used to handle "special"
4294 files such as UNC volumes etc. */
8aaaec6b 4295 if (!(NILP (Vw32_get_true_file_attributes)
19ced600 4296 || (EQ (Vw32_get_true_file_attributes, Qlocal) && is_slow_fs (name)))
6dad7178
EZ		 4297 /* Following symlinks requires getting the info by handle. */
4298 || (is_a_symlink && follow_symlinks))
480b0c5b 4299 {
6dad7178
EZ		 4300 BY_HANDLE_FILE_INFORMATION info;
4301
4302 if (is_a_symlink && !follow_symlinks)
4303 file_flags |= FILE_FLAG_OPEN_REPARSE_POINT;
4304 /* READ_CONTROL access rights are required to get security info
4305 by handle. But if the OS doesn't support security in the
4306 first place, we don't need to try. */
4307 if (is_windows_9x () != TRUE)
4308 access_rights |= READ_CONTROL;
4309
4310 fh = CreateFile (name, access_rights, 0, NULL, OPEN_EXISTING,
4311 file_flags, NULL);
4312 /* If CreateFile fails with READ_CONTROL, try again with zero as
4313 access rights. */
4314 if (fh == INVALID_HANDLE_VALUE && access_rights)
4315 fh = CreateFile (name, 0, 0, NULL, OPEN_EXISTING,
4316 file_flags, NULL);
4317 if (fh == INVALID_HANDLE_VALUE)
4318 goto no_true_file_attributes;
4319
3ed8598c 4320 /* This is more accurate in terms of getting the correct number
aa5ee2a3 4321 of links, but is quite slow (it is noticeable when Emacs is
480b0c5b 4322 making a list of file name completions). */
480b0c5b
GV		 4323 if (GetFileInformationByHandle (fh, &info))
4324 {
6dad7178 4325 nlinks = info.nNumberOfLinks;
76b3903d
GV		 4326 /* Might as well use file index to fake inode values, but this
4327 is not guaranteed to be unique unless we keep a handle open
4328 all the time (even then there are situations where it is
4329 not unique). Reputedly, there are at most 48 bits of info
4330 (on NTFS, presumably less on FAT). */
e3b88685
EZ		 4331 fake_inode = info.nFileIndexHigh;
4332 fake_inode <<= 32;
4333 fake_inode += info.nFileIndexLow;
6dad7178
EZ		 4334 serialnum = info.dwVolumeSerialNumber;
4335 fs_high = info.nFileSizeHigh;
4336 fs_low = info.nFileSizeLow;
4337 ctime = info.ftCreationTime;
4338 atime = info.ftLastAccessTime;
4339 wtime = info.ftLastWriteTime;
4340 fattrs = info.dwFileAttributes;
480b0c5b
GV		 4341 }
4342 else
4343 {
6dad7178
EZ		 4344 /* We don't go to Plan B here, because it's not clear that
4345 it's a good idea. The only known use case where
4346 CreateFile succeeds, but GetFileInformationByHandle fails
4347 (with ERROR_INVALID_FUNCTION) is for character devices
4348 such as NUL, PRN, etc. For these, switching to Plan B is
4349 a net loss, because we lose the character device
4350 attribute returned by GetFileType below (FindFirstFile
4351 doesn't set that bit in the attributes), and the other
4352 fields don't make sense for character devices anyway.
4353 Emacs doesn't really care for non-file entities in the
4354 context of l?stat, so neither do we. */
4355
4356 /* w32err is assigned so one could put a breakpoint here and
4357 examine its value, when GetFileInformationByHandle
4358 fails. */
4359 DWORD w32err = GetLastError ();
4360
4361 switch (w32err)
4362 {
4363 case ERROR_FILE_NOT_FOUND: /* can this ever happen? */
4364 errno = ENOENT;
4365 return -1;
4366 }
01f31dfb
AI		 4367 }
4368
6dad7178
EZ		 4369 /* Test for a symlink before testing for a directory, since
4370 symlinks to directories have the directory bit set, but we
4371 don't want them to appear as directories. */
4372 if (is_a_symlink && !follow_symlinks)
4373 buf->st_mode = S_IFLNK;
4374 else if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
4375 buf->st_mode = S_IFDIR;
93e0f0da
JR		 4376 else
4377 {
6dad7178
EZ		 4378 DWORD ftype = GetFileType (fh);
4379
4380 switch (ftype)
93e0f0da
JR		 4381 {
4382 case FILE_TYPE_DISK:
e3b88685 4383 buf->st_mode = S_IFREG;
93e0f0da
JR		 4384 break;
4385 case FILE_TYPE_PIPE:
e3b88685 4386 buf->st_mode = S_IFIFO;
93e0f0da
JR		 4387 break;
4388 case FILE_TYPE_CHAR:
4389 case FILE_TYPE_UNKNOWN:
4390 default:
e3b88685 4391 buf->st_mode = S_IFCHR;
93e0f0da 4392 }
480b0c5b 4393 }
6dad7178
EZ		 4394 /* We produce the fallback owner and group data, based on the
4395 current user that runs Emacs, in the following cases:
4396
5c207910 4397 . caller didn't request owner and group info
6dad7178
EZ		 4398 . this is Windows 9X
4399 . getting security by handle failed, and we need to produce
4400 information for the target of a symlink (this is better
4401 than producing a potentially misleading info about the
4402 symlink itself)
4403
4404 If getting security by handle fails, and we don't need to
4405 resolve symlinks, we try getting security by name. */
5c207910 4406 if (!w32_stat_get_owner_group || is_windows_9x () == TRUE)
92340ec7 4407 get_file_owner_and_group (NULL, buf);
5c207910 4408 else
6dad7178 4409 {
5c207910
EZ		 4410 psd = get_file_security_desc_by_handle (fh);
4411 if (psd)
4412 {
a4b0cca1 4413 get_file_owner_and_group (psd, buf);
5c207910
EZ		 4414 LocalFree (psd);
4415 }
4416 else if (!(is_a_symlink && follow_symlinks))
4417 {
4418 psd = get_file_security_desc_by_name (name);
a4b0cca1 4419 get_file_owner_and_group (psd, buf);
5c207910
EZ		 4420 xfree (psd);
4421 }
4422 else
a4b0cca1 4423 get_file_owner_and_group (NULL, buf);
6dad7178 4424 }
01f31dfb 4425 CloseHandle (fh);
76b3903d
GV		 4426 }
4427 else
4428 {
6dad7178
EZ		 4429 no_true_file_attributes:
4430 /* Plan B: Either getting a handle on the file failed, or the
4431 caller explicitly asked us to not bother making this
4432 information more accurate.
4433
4434 Implementation note: In Plan B, we never bother to resolve
4435 symlinks, even if we got here because we tried Plan A and
4436 failed. That's because, even if the caller asked for extra
4437 precision by setting Vw32_get_true_file_attributes to t,
4438 resolving symlinks requires acquiring a file handle to the
4439 symlink, which we already know will fail. And if the user
4440 did not ask for extra precision, resolving symlinks will fly
4441 in the face of that request, since the user then wants the
4442 lightweight version of the code. */
806fed21 4443 dbcs_p = max_filename_mbslen () > 1;
6dad7178
EZ		 4444 rootdir = (path >= save_name + len - 1
4445 && (IS_DIRECTORY_SEP (*path) || *path == 0));
4446
4447 /* If name is "c:/.." or "/.." then stat "c:/" or "/". */
4448 r = IS_DEVICE_SEP (name[1]) ? &name[2] : name;
4449 if (IS_DIRECTORY_SEP (r[0])
4450 && r[1] == '.' && r[2] == '.' && r[3] == '\0')
4451 r[1] = r[2] = '\0';
4452
4453 /* Note: If NAME is a symlink to the root of a UNC volume
4454 (i.e. "\\SERVER"), we will not detect that here, and we will
4455 return data about the symlink as result of FindFirst below.
4456 This is unfortunate, but that marginal use case does not
4457 justify a call to chase_symlinks which would impose a penalty
4458 on all the other use cases. (We get here for symlinks to
4459 roots of UNC volumes because CreateFile above fails for them,
4460 unlike with symlinks to root directories X:\ of drives.) */
4461 if (is_unc_volume (name))
4462 {
4463 fattrs = unc_volume_file_attributes (name);
4464 if (fattrs == -1)
4465 return -1;
4466
4467 ctime = atime = wtime = utc_base_ft;
4468 }
4469 else if (rootdir)
4470 {
806fed21
EZ		 4471 if (!dbcs_p)
4472 {
4473 if (!IS_DIRECTORY_SEP (name[len-1]))
4474 strcat (name, "\\");
4475 }
4476 else
4477 {
4478 char *end = name + len;
4479 char *n = CharPrevExA (file_name_codepage, name, end, 0);
4480
4481 if (!IS_DIRECTORY_SEP (*n))
4482 strcat (name, "\\");
4483 }
6dad7178
EZ		 4484 if (GetDriveType (name) < 2)
4485 {
4486 errno = ENOENT;
4487 return -1;
4488 }
4489
4490 fattrs = FILE_ATTRIBUTE_DIRECTORY;
4491 ctime = atime = wtime = utc_base_ft;
4492 }
4493 else
4494 {
806fed21
EZ		 4495 if (!dbcs_p)
4496 {
4497 if (IS_DIRECTORY_SEP (name[len-1]))
4498 name[len - 1] = 0;
4499 }
4500 else
4501 {
4502 char *end = name + len;
4503 char *n = CharPrevExA (file_name_codepage, name, end, 0);
4504
4505 if (IS_DIRECTORY_SEP (*n))
4506 *n = 0;
4507 }
6dad7178
EZ		 4508
4509 /* (This is hacky, but helps when doing file completions on
4510 network drives.) Optimize by using information available from
4511 active readdir if possible. */
4512 len = strlen (dir_pathname);
806fed21
EZ		 4513 if (!dbcs_p)
4514 {
4515 if (IS_DIRECTORY_SEP (dir_pathname[len-1]))
4516 len--;
4517 }
4518 else
4519 {
4520 char *end = dir_pathname + len;
4521 char *n = CharPrevExA (file_name_codepage, dir_pathname, end, 0);
4522
4523 if (IS_DIRECTORY_SEP (*n))
4524 len--;
4525 }
6dad7178
EZ		 4526 if (dir_find_handle != INVALID_HANDLE_VALUE
4527 && !(is_a_symlink && follow_symlinks)
4528 && strnicmp (save_name, dir_pathname, len) == 0
4529 && IS_DIRECTORY_SEP (name[len])
4530 && xstrcasecmp (name + len + 1, dir_static.d_name) == 0)
4531 {
4532 /* This was the last entry returned by readdir. */
0b9de7cd 4533 wfd = dir_find_data_a; /* FIXME!!! */
6dad7178
EZ		 4534 }
4535 else
4536 {
4537 logon_network_drive (name);
4538
4539 fh = FindFirstFile (name, &wfd);
4540 if (fh == INVALID_HANDLE_VALUE)
4541 {
4542 errno = ENOENT;
4543 return -1;
4544 }
4545 FindClose (fh);
4546 }
4547 /* Note: if NAME is a symlink, the information we get from
4548 FindFirstFile is for the symlink, not its target. */
4549 fattrs = wfd.dwFileAttributes;
4550 ctime = wfd.ftCreationTime;
4551 atime = wfd.ftLastAccessTime;
4552 wtime = wfd.ftLastWriteTime;
4553 fs_high = wfd.nFileSizeHigh;
4554 fs_low = wfd.nFileSizeLow;
4555 fake_inode = 0;
4556 nlinks = 1;
4557 serialnum = volume_info.serialnum;
4558 }
4559 if (is_a_symlink && !follow_symlinks)
4560 buf->st_mode = S_IFLNK;
4561 else if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
4562 buf->st_mode = S_IFDIR;
4563 else
4564 buf->st_mode = S_IFREG;
8aaaec6b 4565
92340ec7 4566 get_file_owner_and_group (NULL, buf);
76b3903d
GV		 4567 }
4568
4569#if 0
4570 /* Not sure if there is any point in this. */
4571 if (!NILP (Vw32_generate_fake_inodes))
4572 fake_inode = generate_inode_val (name);
4573 else if (fake_inode == 0)
4574 {
4575 /* For want of something better, try to make everything unique. */
4576 static DWORD gen_num = 0;
4577 fake_inode = ++gen_num;
480b0c5b 4578 }
76b3903d
GV		 4579#endif
4580
6dad7178 4581 buf->st_ino = fake_inode;
480b0c5b 4582
6dad7178
EZ		 4583 buf->st_dev = serialnum;
4584 buf->st_rdev = serialnum;
480b0c5b 4585
6dad7178 4586 buf->st_size = fs_high;
8aaaec6b 4587 buf->st_size <<= 32;
6dad7178
EZ		 4588 buf->st_size += fs_low;
4589 buf->st_nlink = nlinks;
480b0c5b
GV		 4590
4591 /* Convert timestamps to Unix format. */
6dad7178
EZ		 4592 buf->st_mtime = convert_time (wtime);
4593 buf->st_atime = convert_time (atime);
480b0c5b 4594 if (buf->st_atime == 0) buf->st_atime = buf->st_mtime;
6dad7178 4595 buf->st_ctime = convert_time (ctime);
480b0c5b
GV		 4596 if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime;
4597
4598 /* determine rwx permissions */
6dad7178
EZ		 4599 if (is_a_symlink && !follow_symlinks)
4600 permission = S_IREAD | S_IWRITE | S_IEXEC; /* Posix expectations */
480b0c5b 4601 else
6dad7178
EZ		 4602 {
4603 if (fattrs & FILE_ATTRIBUTE_READONLY)
4604 permission = S_IREAD;
4605 else
4606 permission = S_IREAD | S_IWRITE;
177c0ea7 4607
6dad7178
EZ		 4608 if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
4609 permission |= S_IEXEC;
4610 else if (is_exec (name))
4611 permission |= S_IEXEC;
4612 }
480b0c5b
GV		 4613
4614 buf->st_mode |= permission | (permission >> 3) | (permission >> 6);
4615
4616 return 0;
4617}
4618
6dad7178
EZ		 4619int
4620stat (const char * path, struct stat * buf)
4621{
4622 return stat_worker (path, buf, 1);
4623}
4624
4625int
4626lstat (const char * path, struct stat * buf)
4627{
4628 return stat_worker (path, buf, 0);
4629}
4630
8654f9d7
PE		 4631int
4632fstatat (int fd, char const *name, struct stat *st, int flags)
4633{
4634 /* Rely on a hack: an open directory is modeled as file descriptor 0.
4635 This is good enough for the current usage in Emacs, but is fragile.
4636
d9c287e5 4637 FIXME: Add proper support for fdopendir, fstatat, readlinkat.
8654f9d7
PE		 4638 Gnulib does this and can serve as a model. */
4639 char fullname[MAX_PATH];
4640
4641 if (fd != AT_FDCWD)
4642 {
4643 if (_snprintf (fullname, sizeof fullname, "%s/%s", dir_pathname, name)
4644 < 0)
4645 {
4646 errno = ENAMETOOLONG;
4647 return -1;
4648 }
4649 name = fullname;
4650 }
4651
4652 return stat_worker (name, st, ! (flags & AT_SYMLINK_NOFOLLOW));
4653}
4654
16bb7578
GV		 4655/* Provide fstat and utime as well as stat for consistent handling of
4656 file timestamps. */
4657int
4658fstat (int desc, struct stat * buf)
4659{
4660 HANDLE fh = (HANDLE) _get_osfhandle (desc);
4661 BY_HANDLE_FILE_INFORMATION info;
e3b88685 4662 unsigned __int64 fake_inode;
16bb7578
GV		 4663 int permission;
4664
4665 switch (GetFileType (fh) & ~FILE_TYPE_REMOTE)
4666 {
4667 case FILE_TYPE_DISK:
e3b88685 4668 buf->st_mode = S_IFREG;
16bb7578
GV		 4669 if (!GetFileInformationByHandle (fh, &info))
4670 {
4671 errno = EACCES;
4672 return -1;
4673 }
4674 break;
4675 case FILE_TYPE_PIPE:
e3b88685 4676 buf->st_mode = S_IFIFO;
16bb7578
GV		 4677 goto non_disk;
4678 case FILE_TYPE_CHAR:
4679 case FILE_TYPE_UNKNOWN:
4680 default:
e3b88685 4681 buf->st_mode = S_IFCHR;
16bb7578
GV		 4682 non_disk:
4683 memset (&info, 0, sizeof (info));
4684 info.dwFileAttributes = 0;
4685 info.ftCreationTime = utc_base_ft;
4686 info.ftLastAccessTime = utc_base_ft;
4687 info.ftLastWriteTime = utc_base_ft;
4688 }
4689
4690 if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
e3b88685 4691 buf->st_mode = S_IFDIR;
93e0f0da
JR		 4692
4693 buf->st_nlink = info.nNumberOfLinks;
4694 /* Might as well use file index to fake inode values, but this
4695 is not guaranteed to be unique unless we keep a handle open
4696 all the time (even then there are situations where it is
4697 not unique). Reputedly, there are at most 48 bits of info
4698 (on NTFS, presumably less on FAT). */
e3b88685
EZ		 4699 fake_inode = info.nFileIndexHigh;
4700 fake_inode <<= 32;
4701 fake_inode += info.nFileIndexLow;
16bb7578
GV		 4702
4703 /* MSVC defines _ino_t to be short; other libc's might not. */
4704 if (sizeof (buf->st_ino) == 2)
4705 buf->st_ino = fake_inode ^ (fake_inode >> 16);
4706 else
4707 buf->st_ino = fake_inode;
4708
76e9f7b9
EZ		 4709 /* If the caller so requested, get the true file owner and group.
4710 Otherwise, consider the file to belong to the current user. */
4711 if (!w32_stat_get_owner_group || is_windows_9x () == TRUE)
4712 get_file_owner_and_group (NULL, buf);
4713 else
4714 {
4715 PSECURITY_DESCRIPTOR psd = NULL;
4716
4717 psd = get_file_security_desc_by_handle (fh);
4718 if (psd)
4719 {
4720 get_file_owner_and_group (psd, buf);
4721 LocalFree (psd);
4722 }
4723 else
4724 get_file_owner_and_group (NULL, buf);
4725 }
16bb7578
GV		 4726
4727 buf->st_dev = info.dwVolumeSerialNumber;
4728 buf->st_rdev = info.dwVolumeSerialNumber;
4729
8aaaec6b
EZ		 4730 buf->st_size = info.nFileSizeHigh;
4731 buf->st_size <<= 32;
4732 buf->st_size += info.nFileSizeLow;
16bb7578
GV		 4733
4734 /* Convert timestamps to Unix format. */
4735 buf->st_mtime = convert_time (info.ftLastWriteTime);
4736 buf->st_atime = convert_time (info.ftLastAccessTime);
4737 if (buf->st_atime == 0) buf->st_atime = buf->st_mtime;
4738 buf->st_ctime = convert_time (info.ftCreationTime);
4739 if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime;
4740
4741 /* determine rwx permissions */
4742 if (info.dwFileAttributes & FILE_ATTRIBUTE_READONLY)
e3b88685 4743 permission = S_IREAD;
16bb7578 4744 else
e3b88685 4745 permission = S_IREAD | S_IWRITE;
177c0ea7 4746
16bb7578 4747 if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
e3b88685 4748 permission |= S_IEXEC;
16bb7578
GV		 4749 else
4750 {
4751#if 0 /* no way of knowing the filename */
4752 char * p = strrchr (name, '.');
4753 if (p != NULL &&
05131107
JR		 4754 (xstrcasecmp (p, ".exe") == 0 ||
4755 xstrcasecmp (p, ".com") == 0 ||
4756 xstrcasecmp (p, ".bat") == 0 ||
4757 xstrcasecmp (p, ".cmd") == 0))
e3b88685 4758 permission |= S_IEXEC;
16bb7578
GV		 4759#endif
4760 }
4761
4762 buf->st_mode |= permission | (permission >> 3) | (permission >> 6);
4763
4764 return 0;
4765}
4766
b34454d0
EZ		 4767/* A version of 'utime' which handles directories as well as
4768 files. */
4769
16bb7578 4770int
86e93460 4771utime (const char *name, struct utimbuf *times)
16bb7578 4772{
86e93460 4773 struct utimbuf deftime;
16bb7578
GV		 4774 HANDLE fh;
4775 FILETIME mtime;
4776 FILETIME atime;
4777
4778 if (times == NULL)
4779 {
4780 deftime.modtime = deftime.actime = time (NULL);
4781 times = &deftime;
4782 }
4783
80fcb9d2
EZ		 4784 if (w32_unicode_filenames)
4785 {
4786 wchar_t name_utf16[MAX_PATH];
4787
4788 if (filename_to_utf16 (name, name_utf16) != 0)
4789 return -1; /* errno set by filename_to_utf16 */
4790
4791 /* Need write access to set times. */
4792 fh = CreateFileW (name_utf16, FILE_WRITE_ATTRIBUTES,
4793 /* If NAME specifies a directory, FILE_SHARE_DELETE
4794 allows other processes to delete files inside it,
4795 while we have the directory open. */
4796 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
4797 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
4798 }
4799 else
4800 {
4801 char name_ansi[MAX_PATH];
4802
4803 if (filename_to_ansi (name, name_ansi) != 0)
4804 return -1; /* errno set by filename_to_ansi */
4805
4806 fh = CreateFileA (name_ansi, FILE_WRITE_ATTRIBUTES,
4807 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
4808 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
4809 }
7604f298 4810 if (fh != INVALID_HANDLE_VALUE)
16bb7578
GV		 4811 {
4812 convert_from_time_t (times->actime, &atime);
4813 convert_from_time_t (times->modtime, &mtime);
4814 if (!SetFileTime (fh, NULL, &atime, &mtime))
4815 {
4816 CloseHandle (fh);
4817 errno = EACCES;
4818 return -1;
4819 }
4820 CloseHandle (fh);
4821 }
4822 else
4823 {
80fcb9d2
EZ		 4824 DWORD err = GetLastError ();
4825
4826 switch (err)
4827 {
4828 case ERROR_FILE_NOT_FOUND:
4829 case ERROR_PATH_NOT_FOUND:
4830 case ERROR_INVALID_DRIVE:
4831 case ERROR_BAD_NETPATH:
4832 case ERROR_DEV_NOT_EXIST:
4833 /* ERROR_INVALID_NAME is the error CreateFile sets when the
4834 file name includes ?s, i.e. translation to ANSI failed. */
4835 case ERROR_INVALID_NAME:
4836 errno = ENOENT;
4837 break;
4838 case ERROR_TOO_MANY_OPEN_FILES:
4839 errno = ENFILE;
4840 break;
4841 case ERROR_ACCESS_DENIED:
4842 case ERROR_SHARING_VIOLATION:
4843 errno = EACCES;
4844 break;
4845 default:
4846 errno = EINVAL;
4847 break;
4848 }
16bb7578
GV		 4849 return -1;
4850 }
4851 return 0;
4852}
4853
7c80d5ec 4854\f
6dad7178
EZ		 4855/* Symlink-related functions. */
4856#ifndef SYMBOLIC_LINK_FLAG_DIRECTORY
4857#define SYMBOLIC_LINK_FLAG_DIRECTORY 0x1
4858#endif
4859
0f7bb05d 4860int
6dad7178 4861symlink (char const *filename, char const *linkname)
0f7bb05d 4862{
6dad7178
EZ		 4863 char linkfn[MAX_PATH], *tgtfn;
4864 DWORD flags = 0;
4865 int dir_access, filename_ends_in_slash;
806fed21 4866 int dbcs_p;
6dad7178
EZ		 4867
4868 /* Diagnostics follows Posix as much as possible. */
4869 if (filename == NULL || linkname == NULL)
4870 {
4871 errno = EFAULT;
4872 return -1;
4873 }
4874 if (!*filename)
4875 {
4876 errno = ENOENT;
4877 return -1;
4878 }
4879 if (strlen (filename) > MAX_PATH || strlen (linkname) > MAX_PATH)
4880 {
4881 errno = ENAMETOOLONG;
4882 return -1;
4883 }
4884
4885 strcpy (linkfn, map_w32_filename (linkname, NULL));
4886 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) == 0)
4887 {
4888 errno = EPERM;
4889 return -1;
4890 }
4891
806fed21
EZ		 4892 dbcs_p = max_filename_mbslen () > 1;
4893
6dad7178
EZ		 4894 /* Note: since empty FILENAME was already rejected, we can safely
4895 refer to FILENAME[1]. */
4896 if (!(IS_DIRECTORY_SEP (filename[0]) || IS_DEVICE_SEP (filename[1])))
4897 {
4898 /* Non-absolute FILENAME is understood as being relative to
4899 LINKNAME's directory. We need to prepend that directory to
14f20728 4900 FILENAME to get correct results from faccessat below, since
6dad7178
EZ		 4901 otherwise it will interpret FILENAME relative to the
4902 directory where the Emacs process runs. Note that
4903 make-symbolic-link always makes sure LINKNAME is a fully
4904 expanded file name. */
4905 char tem[MAX_PATH];
4906 char *p = linkfn + strlen (linkfn);
4907
806fed21
EZ		 4908 if (!dbcs_p)
4909 {
4910 while (p > linkfn && !IS_ANY_SEP (p[-1]))
4911 p--;
4912 }
4913 else
4914 {
4915 char *p1 = CharPrevExA (file_name_codepage, linkfn, p, 0);
4916
4917 while (p > linkfn && !IS_ANY_SEP (*p1))
4918 {
4919 p = p1;
4920 p1 = CharPrevExA (file_name_codepage, linkfn, p1, 0);
4921 }
4922 }
6dad7178
EZ		 4923 if (p > linkfn)
4924 strncpy (tem, linkfn, p - linkfn);
4925 tem[p - linkfn] = '\0';
4926 strcat (tem, filename);
14f20728 4927 dir_access = faccessat (AT_FDCWD, tem, D_OK, AT_EACCESS);
6dad7178
EZ		 4928 }
4929 else
14f20728 4930 dir_access = faccessat (AT_FDCWD, filename, D_OK, AT_EACCESS);
6dad7178
EZ		 4931
4932 /* Since Windows distinguishes between symlinks to directories and
8b2e00a3 4933 to files, we provide a kludgy feature: if FILENAME doesn't
6dad7178
EZ		 4934 exist, but ends in a slash, we create a symlink to directory. If
4935 FILENAME exists and is a directory, we always create a symlink to
4936 directory. */
806fed21
EZ		 4937 if (!dbcs_p)
4938 filename_ends_in_slash = IS_DIRECTORY_SEP (filename[strlen (filename) - 1]);
4939 else
4940 {
4941 const char *end = filename + strlen (filename);
4942 const char *n = CharPrevExA (file_name_codepage, filename, end, 0);
4943
4944 filename_ends_in_slash = IS_DIRECTORY_SEP (*n);
4945 }
6dad7178
EZ		 4946 if (dir_access == 0 || filename_ends_in_slash)
4947 flags = SYMBOLIC_LINK_FLAG_DIRECTORY;
4948
4949 tgtfn = (char *)map_w32_filename (filename, NULL);
4950 if (filename_ends_in_slash)
4951 tgtfn[strlen (tgtfn) - 1] = '\0';
4952
4953 errno = 0;
4954 if (!create_symbolic_link (linkfn, tgtfn, flags))
4955 {
4956 /* ENOSYS is set by create_symbolic_link, when it detects that
4957 the OS doesn't support the CreateSymbolicLink API. */
4958 if (errno != ENOSYS)
4959 {
4960 DWORD w32err = GetLastError ();
4961
4962 switch (w32err)
4963 {
4964 /* ERROR_SUCCESS is sometimes returned when LINKFN and
4965 TGTFN point to the same file name, go figure. */
4966 case ERROR_SUCCESS:
4967 case ERROR_FILE_EXISTS:
4968 errno = EEXIST;
4969 break;
4970 case ERROR_ACCESS_DENIED:
4971 errno = EACCES;
4972 break;
4973 case ERROR_FILE_NOT_FOUND:
4974 case ERROR_PATH_NOT_FOUND:
4975 case ERROR_BAD_NETPATH:
4976 case ERROR_INVALID_REPARSE_DATA:
4977 errno = ENOENT;
4978 break;
4979 case ERROR_DIRECTORY:
4980 errno = EISDIR;
4981 break;
4982 case ERROR_PRIVILEGE_NOT_HELD:
4983 case ERROR_NOT_ALL_ASSIGNED:
4984 errno = EPERM;
4985 break;
4986 case ERROR_DISK_FULL:
4987 errno = ENOSPC;
4988 break;
4989 default:
4990 errno = EINVAL;
4991 break;
4992 }
4993 }
4994 return -1;
4995 }
4996 return 0;
0f7bb05d
EZ		 4997}
4998
6dad7178
EZ		 4999/* A quick inexpensive test of whether FILENAME identifies a file that
5000 is a symlink. Returns non-zero if it is, zero otherwise. FILENAME
5001 must already be in the normalized form returned by
5002 map_w32_filename.
5003
5004 Note: for repeated operations on many files, it is best to test
5005 whether the underlying volume actually supports symlinks, by
5006 testing the FILE_SUPPORTS_REPARSE_POINTS bit in volume's flags, and
5007 avoid the call to this function if it doesn't. That's because the
8b2e00a3 5008 call to GetFileAttributes takes a non-negligible time, especially
6dad7178
EZ		 5009 on non-local or removable filesystems. See stat_worker for an
5010 example of how to do that. */
5011static int
5012is_symlink (const char *filename)
5013{
5014 DWORD attrs;
5015 WIN32_FIND_DATA wfd;
5016 HANDLE fh;
5017
5018 attrs = GetFileAttributes (filename);
5019 if (attrs == -1)
5020 {
5021 DWORD w32err = GetLastError ();
5022
5023 switch (w32err)
5024 {
5025 case ERROR_BAD_NETPATH: /* network share, can't be a symlink */
5026 break;
5027 case ERROR_ACCESS_DENIED:
5028 errno = EACCES;
5029 break;
5030 case ERROR_FILE_NOT_FOUND:
5031 case ERROR_PATH_NOT_FOUND:
5032 default:
5033 errno = ENOENT;
5034 break;
5035 }
5036 return 0;
5037 }
5038 if ((attrs & FILE_ATTRIBUTE_REPARSE_POINT) == 0)
5039 return 0;
5040 logon_network_drive (filename);
5041 fh = FindFirstFile (filename, &wfd);
5042 if (fh == INVALID_HANDLE_VALUE)
5043 return 0;
5044 FindClose (fh);
5045 return (wfd.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) != 0
5046 && (wfd.dwReserved0 & IO_REPARSE_TAG_SYMLINK) == IO_REPARSE_TAG_SYMLINK;
5047}
5048
5049/* If NAME identifies a symbolic link, copy into BUF the file name of
5050 the symlink's target. Copy at most BUF_SIZE bytes, and do NOT
5051 null-terminate the target name, even if it fits. Return the number
5052 of bytes copied, or -1 if NAME is not a symlink or any error was
5053 encountered while resolving it. The file name copied into BUF is
5054 encoded in the current ANSI codepage. */
0f7bb05d 5055ssize_t
6dad7178 5056readlink (const char *name, char *buf, size_t buf_size)
0f7bb05d 5057{
6dad7178
EZ		 5058 const char *path;
5059 TOKEN_PRIVILEGES privs;
5060 int restore_privs = 0;
5061 HANDLE sh;
5062 ssize_t retval;
5063
5064 if (name == NULL)
5065 {
5066 errno = EFAULT;
5067 return -1;
5068 }
5069 if (!*name)
5070 {
5071 errno = ENOENT;
5072 return -1;
5073 }
5074
5075 path = map_w32_filename (name, NULL);
5076
5077 if (strlen (path) > MAX_PATH)
5078 {
5079 errno = ENAMETOOLONG;
5080 return -1;
5081 }
5082
5083 errno = 0;
5084 if (is_windows_9x () == TRUE
5085 || (volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) == 0
5086 || !is_symlink (path))
5087 {
5088 if (!errno)
5089 errno = EINVAL; /* not a symlink */
5090 return -1;
5091 }
5092
5093 /* Done with simple tests, now we're in for some _real_ work. */
5094 if (enable_privilege (SE_BACKUP_NAME, TRUE, &privs))
5095 restore_privs = 1;
5096 /* Implementation note: From here and onward, don't return early,
5097 since that will fail to restore the original set of privileges of
5098 the calling thread. */
5099
5100 retval = -1; /* not too optimistic, are we? */
5101
5102 /* Note: In the next call to CreateFile, we use zero as the 2nd
5103 argument because, when the symlink is a hidden/system file,
5104 e.g. 'C:\Users\All Users', GENERIC_READ fails with
5105 ERROR_ACCESS_DENIED. Zero seems to work just fine, both for file
5106 and directory symlinks. */
5107 sh = CreateFile (path, 0, 0, NULL, OPEN_EXISTING,
5108 FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS,
5109 NULL);
5110 if (sh != INVALID_HANDLE_VALUE)
5111 {
5112 BYTE reparse_buf[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
5113 REPARSE_DATA_BUFFER *reparse_data = (REPARSE_DATA_BUFFER *)&reparse_buf[0];
5114 DWORD retbytes;
5115
5116 if (!DeviceIoControl (sh, FSCTL_GET_REPARSE_POINT, NULL, 0,
5117 reparse_buf, MAXIMUM_REPARSE_DATA_BUFFER_SIZE,
5118 &retbytes, NULL))
5119 errno = EIO;
5120 else if (reparse_data->ReparseTag != IO_REPARSE_TAG_SYMLINK)
5121 errno = EINVAL;
5122 else
5123 {
474d441e 5124 /* Copy the link target name, in wide characters, from
6dad7178
EZ		 5125 reparse_data, then convert it to multibyte encoding in
5126 the current locale's codepage. */
5127 WCHAR *lwname;
5128 BYTE lname[MAX_PATH];
5129 USHORT lname_len;
5130 USHORT lwname_len =
5131 reparse_data->SymbolicLinkReparseBuffer.PrintNameLength;
5132 WCHAR *lwname_src =
5133 reparse_data->SymbolicLinkReparseBuffer.PathBuffer
5134 + reparse_data->SymbolicLinkReparseBuffer.PrintNameOffset/sizeof(WCHAR);
26854e9c
EZ		 5135 /* This updates file_name_codepage which we need below. */
5136 int dbcs_p = max_filename_mbslen () > 1;
6dad7178
EZ		 5137
5138 /* According to MSDN, PrintNameLength does not include the
5139 terminating null character. */
5140 lwname = alloca ((lwname_len + 1) * sizeof(WCHAR));
5141 memcpy (lwname, lwname_src, lwname_len);
5142 lwname[lwname_len/sizeof(WCHAR)] = 0; /* null-terminate */
5143
26854e9c 5144 lname_len = WideCharToMultiByte (file_name_codepage, 0, lwname, -1,
6dad7178
EZ		 5145 lname, MAX_PATH, NULL, NULL);
5146 if (!lname_len)
5147 {
5148 /* WideCharToMultiByte failed. */
5149 DWORD w32err1 = GetLastError ();
5150
5151 switch (w32err1)
5152 {
5153 case ERROR_INSUFFICIENT_BUFFER:
5154 errno = ENAMETOOLONG;
5155 break;
5156 case ERROR_INVALID_PARAMETER:
5157 errno = EFAULT;
5158 break;
5159 case ERROR_NO_UNICODE_TRANSLATION:
5160 errno = ENOENT;
5161 break;
5162 default:
5163 errno = EINVAL;
5164 break;
5165 }
5166 }
5167 else
5168 {
5169 size_t size_to_copy = buf_size;
6ee4509a 5170 BYTE *p = lname, *p2;
6dad7178
EZ		 5171 BYTE *pend = p + lname_len;
5172
5173 /* Normalize like dostounix_filename does, but we don't
5174 want to assume that lname is null-terminated. */
6ee4509a 5175 if (dbcs_p)
26854e9c 5176 p2 = CharNextExA (file_name_codepage, p, 0);
6ee4509a
EZ		 5177 else
5178 p2 = p + 1;
5179 if (*p && *p2 == ':' && *p >= 'A' && *p <= 'Z')
5180 {
5181 *p += 'a' - 'A';
5182 p += 2;
5183 }
6dad7178
EZ		 5184 while (p <= pend)
5185 {
5186 if (*p == '\\')
5187 *p = '/';
6ee4509a
EZ		 5188 if (dbcs_p)
5189 {
26854e9c 5190 p = CharNextExA (file_name_codepage, p, 0);
6ee4509a
EZ		 5191 /* CharNextExA doesn't advance at null character. */
5192 if (!*p)
5193 break;
5194 }
5195 else
5196 ++p;
6dad7178
EZ		 5197 }
5198 /* Testing for null-terminated LNAME is paranoia:
5199 WideCharToMultiByte should always return a
5200 null-terminated string when its 4th argument is -1
5201 and its 3rd argument is null-terminated (which they
5202 are, see above). */
5203 if (lname[lname_len - 1] == '\0')
5204 lname_len--;
5205 if (lname_len <= buf_size)
5206 size_to_copy = lname_len;
5207 strncpy (buf, lname, size_to_copy);
5208 /* Success! */
5209 retval = size_to_copy;
5210 }
5211 }
5212 CloseHandle (sh);
5213 }
5214 else
5215 {
5216 /* CreateFile failed. */
5217 DWORD w32err2 = GetLastError ();
5218
5219 switch (w32err2)
5220 {
5221 case ERROR_FILE_NOT_FOUND:
5222 case ERROR_PATH_NOT_FOUND:
5223 errno = ENOENT;
5224 break;
5225 case ERROR_ACCESS_DENIED:
5226 case ERROR_TOO_MANY_OPEN_FILES:
5227 errno = EACCES;
5228 break;
5229 default:
5230 errno = EPERM;
5231 break;
5232 }
5233 }
5234 if (restore_privs)
5235 {
5236 restore_privilege (&privs);
5237 revert_to_self ();
5238 }
5239
5240 return retval;
0f7bb05d
EZ		 5241}
5242
8654f9d7
PE		 5243ssize_t
5244readlinkat (int fd, char const *name, char *buffer,
5245 size_t buffer_size)
5246{
5247 /* Rely on a hack: an open directory is modeled as file descriptor 0,
5248 as in fstatat. FIXME: Add proper support for readlinkat. */
5249 char fullname[MAX_PATH];
5250
5251 if (fd != AT_FDCWD)
5252 {
5253 if (_snprintf (fullname, sizeof fullname, "%s/%s", dir_pathname, name)
5254 < 0)
5255 {
5256 errno = ENAMETOOLONG;
5257 return -1;
5258 }
5259 name = fullname;
5260 }
5261
5262 return readlink (name, buffer, buffer_size);
5263}
5264
6dad7178
EZ		 5265/* If FILE is a symlink, return its target (stored in a static
5266 buffer); otherwise return FILE.
5267
5268 This function repeatedly resolves symlinks in the last component of
5269 a chain of symlink file names, as in foo -> bar -> baz -> ...,
5270 until it arrives at a file whose last component is not a symlink,
5271 or some error occurs. It returns the target of the last
5272 successfully resolved symlink in the chain. If it succeeds to
5273 resolve even a single symlink, the value returned is an absolute
5274 file name with backslashes (result of GetFullPathName). By
5275 contrast, if the original FILE is returned, it is unaltered.
5276
5277 Note: This function can set errno even if it succeeds.
5278
5279 Implementation note: we only resolve the last portion ("basename")
5280 of the argument FILE and of each following file in the chain,
5281 disregarding any possible symlinks in its leading directories.
5282 This is because Windows system calls and library functions
5283 transparently resolve symlinks in leading directories and return
5284 correct information, as long as the basename is not a symlink. */
5285static char *
5286chase_symlinks (const char *file)
5287{
5288 static char target[MAX_PATH];
5289 char link[MAX_PATH];
5290 ssize_t res, link_len;
5291 int loop_count = 0;
806fed21 5292 int dbcs_p;
6dad7178
EZ		 5293
5294 if (is_windows_9x () == TRUE || !is_symlink (file))
5295 return (char *)file;
5296
5297 if ((link_len = GetFullPathName (file, MAX_PATH, link, NULL)) == 0)
5298 return (char *)file;
5299
806fed21 5300 dbcs_p = max_filename_mbslen () > 1;
6dad7178
EZ		 5301 target[0] = '\0';
5302 do {
5303
5304 /* Remove trailing slashes, as we want to resolve the last
5305 non-trivial part of the link name. */
806fed21
EZ		 5306 if (!dbcs_p)
5307 {
5308 while (link_len > 3 && IS_DIRECTORY_SEP (link[link_len-1]))
5309 link[link_len--] = '\0';
5310 }
5311 else if (link_len > 3)
5312 {
5313 char *n = CharPrevExA (file_name_codepage, link, link + link_len, 0);
5314
5315 while (n >= link + 2 && IS_DIRECTORY_SEP (*n))
5316 {
5317 n[1] = '\0';
5318 n = CharPrevExA (file_name_codepage, link, n, 0);
5319 }
5320 }
6dad7178
EZ		 5321
5322 res = readlink (link, target, MAX_PATH);
5323 if (res > 0)
5324 {
5325 target[res] = '\0';
5326 if (!(IS_DEVICE_SEP (target[1])
25a20a3a 5327 || (IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]))))
6dad7178
EZ		 5328 {
5329 /* Target is relative. Append it to the directory part of
5330 the symlink, then copy the result back to target. */
5331 char *p = link + link_len;
5332
806fed21
EZ		 5333 if (!dbcs_p)
5334 {
5335 while (p > link && !IS_ANY_SEP (p[-1]))
5336 p--;
5337 }
5338 else
5339 {
5340 char *p1 = CharPrevExA (file_name_codepage, link, p, 0);
5341
5342 while (p > link && !IS_ANY_SEP (*p1))
5343 {
5344 p = p1;
5345 p1 = CharPrevExA (file_name_codepage, link, p1, 0);
5346 }
5347 }
6dad7178
EZ		 5348 strcpy (p, target);
5349 strcpy (target, link);
5350 }
5351 /* Resolve any "." and ".." to get a fully-qualified file name
5352 in link[] again. */
5353 link_len = GetFullPathName (target, MAX_PATH, link, NULL);
5354 }
5355 } while (res > 0 && link_len > 0 && ++loop_count <= 100);
5356
5357 if (loop_count > 100)
5358 errno = ELOOP;
5359
5360 if (target[0] == '\0') /* not a single call to readlink succeeded */
5361 return (char *)file;
5362 return target;
5363}
5364
66447e07
EZ		 5365\f
5366/* Posix ACL emulation. */
5367
5368int
5369acl_valid (acl_t acl)
5370{
5371 return is_valid_security_descriptor ((PSECURITY_DESCRIPTOR)acl) ? 0 : -1;
5372}
5373
5374char *
5375acl_to_text (acl_t acl, ssize_t *size)
5376{
5377 LPTSTR str_acl;
5378 SECURITY_INFORMATION flags =
5379 OWNER_SECURITY_INFORMATION |
5380 GROUP_SECURITY_INFORMATION |
5381 DACL_SECURITY_INFORMATION;
5382 char *retval = NULL;
b764d018 5383 ULONG local_size;
66447e07
EZ		 5384 int e = errno;
5385
5386 errno = 0;
5387
5388 if (convert_sd_to_sddl ((PSECURITY_DESCRIPTOR)acl, SDDL_REVISION_1, flags, &str_acl, &local_size))
5389 {
5390 errno = e;
5391 /* We don't want to mix heaps, so we duplicate the string in our
5392 heap and free the one allocated by the API. */
5393 retval = xstrdup (str_acl);
5394 if (size)
5395 *size = local_size;
5396 LocalFree (str_acl);
5397 }
5398 else if (errno != ENOTSUP)
5399 errno = EINVAL;
5400
5401 return retval;
5402}
5403
5404acl_t
5405acl_from_text (const char *acl_str)
5406{
5407 PSECURITY_DESCRIPTOR psd, retval = NULL;
5408 ULONG sd_size;
5409 int e = errno;
5410
5411 errno = 0;
5412
5413 if (convert_sddl_to_sd (acl_str, SDDL_REVISION_1, &psd, &sd_size))
5414 {
5415 errno = e;
5416 retval = xmalloc (sd_size);
5417 memcpy (retval, psd, sd_size);
5418 LocalFree (psd);
5419 }
5420 else if (errno != ENOTSUP)
5421 errno = EINVAL;
5422
5423 return retval;
5424}
5425
5426int
5427acl_free (void *ptr)
5428{
5429 xfree (ptr);
5430 return 0;
5431}
5432
5433acl_t
5434acl_get_file (const char *fname, acl_type_t type)
5435{
5436 PSECURITY_DESCRIPTOR psd = NULL;
474d441e 5437 const char *filename;
66447e07
EZ		 5438
5439 if (type == ACL_TYPE_ACCESS)
5440 {
5441 DWORD sd_len, err;
5442 SECURITY_INFORMATION si =
5443 OWNER_SECURITY_INFORMATION |
5444 GROUP_SECURITY_INFORMATION |
5445 DACL_SECURITY_INFORMATION ;
5446 int e = errno;
5447
474d441e
EZ		 5448 filename = map_w32_filename (fname, NULL);
5449 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
5450 fname = chase_symlinks (filename);
5451 else
5452 fname = filename;
5453
66447e07
EZ		 5454 errno = 0;
5455 if (!get_file_security (fname, si, psd, 0, &sd_len)
5456 && errno != ENOTSUP)
5457 {
5458 err = GetLastError ();
5459 if (err == ERROR_INSUFFICIENT_BUFFER)
5460 {
5461 psd = xmalloc (sd_len);
5462 if (!get_file_security (fname, si, psd, sd_len, &sd_len))
5463 {
5464 xfree (psd);
5465 errno = EIO;
5466 psd = NULL;
5467 }
5468 }
5469 else if (err == ERROR_FILE_NOT_FOUND
5470 || err == ERROR_PATH_NOT_FOUND)
5471 errno = ENOENT;
5472 else
5473 errno = EIO;
5474 }
5475 else if (!errno)
5476 errno = e;
5477 }
5478 else if (type != ACL_TYPE_DEFAULT)
5479 errno = EINVAL;
5480
5481 return psd;
5482}
5483
5484int
5485acl_set_file (const char *fname, acl_type_t type, acl_t acl)
5486{
5487 TOKEN_PRIVILEGES old1, old2;
5488 DWORD err;
66447e07
EZ		 5489 int st = 0, retval = -1;
5490 SECURITY_INFORMATION flags = 0;
5491 PSID psid;
5492 PACL pacl;
5493 BOOL dflt;
5494 BOOL dacl_present;
5495 int e;
474d441e 5496 const char *filename;
66447e07
EZ		 5497
5498 if (acl_valid (acl) != 0
5499 || (type != ACL_TYPE_DEFAULT && type != ACL_TYPE_ACCESS))
5500 {
5501 errno = EINVAL;
5502 return -1;
5503 }
5504
5505 if (type == ACL_TYPE_DEFAULT)
5506 {
5507 errno = ENOSYS;
5508 return -1;
5509 }
5510
474d441e
EZ		 5511 filename = map_w32_filename (fname, NULL);
5512 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
5513 fname = chase_symlinks (filename);
5514 else
5515 fname = filename;
5516
66447e07
EZ		 5517 if (get_security_descriptor_owner ((PSECURITY_DESCRIPTOR)acl, &psid, &dflt)
5518 && psid)
5519 flags |= OWNER_SECURITY_INFORMATION;
5520 if (get_security_descriptor_group ((PSECURITY_DESCRIPTOR)acl, &psid, &dflt)
5521 && psid)
5522 flags |= GROUP_SECURITY_INFORMATION;
5523 if (get_security_descriptor_dacl ((PSECURITY_DESCRIPTOR)acl, &dacl_present,
5524 &pacl, &dflt)
5525 && dacl_present)
5526 flags |= DACL_SECURITY_INFORMATION;
5527 if (!flags)
5528 return 0;
5529
5530 /* According to KB-245153, setting the owner will succeed if either:
5531 (1) the caller is the user who will be the new owner, and has the
5532 SE_TAKE_OWNERSHIP privilege, or
5533 (2) the caller has the SE_RESTORE privilege, in which case she can
5534 set any valid user or group as the owner
5535
5536 We request below both SE_TAKE_OWNERSHIP and SE_RESTORE
5537 privileges, and disregard any failures in obtaining them. If
5538 these privileges cannot be obtained, and do not already exist in
5539 the calling thread's security token, this function could fail
5540 with EPERM. */
5541 if (enable_privilege (SE_TAKE_OWNERSHIP_NAME, TRUE, &old1))
5542 st++;
5543 if (enable_privilege (SE_RESTORE_NAME, TRUE, &old2))
5544 st++;
5545
5546 e = errno;
5547 errno = 0;
84e5ed96 5548 if (!set_file_security ((char *)fname, flags, (PSECURITY_DESCRIPTOR)acl))
474d441e 5549 {
84e5ed96 5550 err = GetLastError ();
40ff07a5 5551
84e5ed96
EZ		 5552 if (errno == ENOTSUP)
5553 ;
5554 else if (err == ERROR_INVALID_OWNER
5555 || err == ERROR_NOT_ALL_ASSIGNED
5556 || err == ERROR_ACCESS_DENIED)
40ff07a5 5557 {
84e5ed96
EZ		 5558 /* Maybe the requested ACL and the one the file already has
5559 are identical, in which case we can silently ignore the
5560 failure. (And no, Windows doesn't.) */
5561 acl_t current_acl = acl_get_file (fname, ACL_TYPE_ACCESS);
40ff07a5 5562
84e5ed96
EZ		 5563 errno = EPERM;
5564 if (current_acl)
40ff07a5 5565 {
84e5ed96
EZ		 5566 char *acl_from = acl_to_text (current_acl, NULL);
5567 char *acl_to = acl_to_text (acl, NULL);
5568
5569 if (acl_from && acl_to && xstrcasecmp (acl_from, acl_to) == 0)
5570 {
5571 retval = 0;
5572 errno = e;
5573 }
5574 if (acl_from)
5575 acl_free (acl_from);
5576 if (acl_to)
5577 acl_free (acl_to);
5578 acl_free (current_acl);
40ff07a5 5579 }
40ff07a5 5580 }
84e5ed96
EZ		 5581 else if (err == ERROR_FILE_NOT_FOUND || err == ERROR_PATH_NOT_FOUND)
5582 errno = ENOENT;
5583 else
5584 errno = EACCES;
5585 }
5586 else
5587 {
5588 retval = 0;
5589 errno = e;
5590 }
5591
5592 if (st)
5593 {
5594 if (st >= 2)
5595 restore_privilege (&old2);
5596 restore_privilege (&old1);
5597 revert_to_self ();
40ff07a5 5598 }
66447e07
EZ		 5599
5600 return retval;
5601}
5602
5603\f
6dad7178
EZ		 5604/* MS-Windows version of careadlinkat (cf. ../lib/careadlinkat.c). We
5605 have a fixed max size for file names, so we don't need the kind of
5606 alloc/malloc/realloc dance the gnulib version does. We also don't
5607 support FD-relative symlinks. */
973f782d
EZ		 5608char *
5609careadlinkat (int fd, char const *filename,
5610 char *buffer, size_t buffer_size,
5611 struct allocator const *alloc,
5612 ssize_t (*preadlinkat) (int, char const *, char *, size_t))
5613{
6dad7178
EZ		 5614 char linkname[MAX_PATH];
5615 ssize_t link_size;
5616
6dad7178
EZ		 5617 link_size = preadlinkat (fd, filename, linkname, sizeof(linkname));
5618
5619 if (link_size > 0)
5620 {
5621 char *retval = buffer;
5622
5623 linkname[link_size++] = '\0';
5624 if (link_size > buffer_size)
5625 retval = (char *)(alloc ? alloc->allocate : xmalloc) (link_size);
5626 if (retval)
5627 memcpy (retval, linkname, link_size);
5628
5629 return retval;
5630 }
973f782d
EZ		 5631 return NULL;
5632}
5633
0f7bb05d 5634\f
7c80d5ec
EZ		 5635/* Support for browsing other processes and their attributes. See
5636 process.c for the Lisp bindings. */
5637
5638/* Helper wrapper functions. */
5639
bedf4aab
JB		 5640static HANDLE WINAPI
5641create_toolhelp32_snapshot (DWORD Flags, DWORD Ignored)
7c80d5ec
EZ		 5642{
5643 static CreateToolhelp32Snapshot_Proc s_pfn_Create_Toolhelp32_Snapshot = NULL;
5644
5645 if (g_b_init_create_toolhelp32_snapshot == 0)
5646 {
5647 g_b_init_create_toolhelp32_snapshot = 1;
5648 s_pfn_Create_Toolhelp32_Snapshot = (CreateToolhelp32Snapshot_Proc)
5649 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5650 "CreateToolhelp32Snapshot");
5651 }
5652 if (s_pfn_Create_Toolhelp32_Snapshot == NULL)
5653 {
5654 return INVALID_HANDLE_VALUE;
5655 }
5656 return (s_pfn_Create_Toolhelp32_Snapshot (Flags, Ignored));
5657}
5658
bedf4aab
JB		 5659static BOOL WINAPI
5660process32_first (HANDLE hSnapshot, LPPROCESSENTRY32 lppe)
7c80d5ec
EZ		 5661{
5662 static Process32First_Proc s_pfn_Process32_First = NULL;
5663
5664 if (g_b_init_process32_first == 0)
5665 {
5666 g_b_init_process32_first = 1;
5667 s_pfn_Process32_First = (Process32First_Proc)
5668 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5669 "Process32First");
5670 }
5671 if (s_pfn_Process32_First == NULL)
5672 {
5673 return FALSE;
5674 }
5675 return (s_pfn_Process32_First (hSnapshot, lppe));
5676}
5677
bedf4aab
JB		 5678static BOOL WINAPI
5679process32_next (HANDLE hSnapshot, LPPROCESSENTRY32 lppe)
7c80d5ec
EZ		 5680{
5681 static Process32Next_Proc s_pfn_Process32_Next = NULL;
5682
5683 if (g_b_init_process32_next == 0)
5684 {
5685 g_b_init_process32_next = 1;
5686 s_pfn_Process32_Next = (Process32Next_Proc)
5687 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5688 "Process32Next");
5689 }
5690 if (s_pfn_Process32_Next == NULL)
5691 {
5692 return FALSE;
5693 }
5694 return (s_pfn_Process32_Next (hSnapshot, lppe));
5695}
5696
bedf4aab
JB		 5697static BOOL WINAPI
5698open_thread_token (HANDLE ThreadHandle,
5699 DWORD DesiredAccess,
5700 BOOL OpenAsSelf,
5701 PHANDLE TokenHandle)
7c80d5ec
EZ		 5702{
5703 static OpenThreadToken_Proc s_pfn_Open_Thread_Token = NULL;
5704 HMODULE hm_advapi32 = NULL;
5705 if (is_windows_9x () == TRUE)
5706 {
5707 SetLastError (ERROR_NOT_SUPPORTED);
5708 return FALSE;
5709 }
5710 if (g_b_init_open_thread_token == 0)
5711 {
5712 g_b_init_open_thread_token = 1;
5713 hm_advapi32 = LoadLibrary ("Advapi32.dll");
5714 s_pfn_Open_Thread_Token =
5715 (OpenThreadToken_Proc) GetProcAddress (hm_advapi32, "OpenThreadToken");
5716 }
5717 if (s_pfn_Open_Thread_Token == NULL)
5718 {
5719 SetLastError (ERROR_NOT_SUPPORTED);
5720 return FALSE;
5721 }
5722 return (
5723 s_pfn_Open_Thread_Token (
5724 ThreadHandle,
5725 DesiredAccess,
5726 OpenAsSelf,
5727 TokenHandle)
5728 );
5729}
5730
bedf4aab
JB		 5731static BOOL WINAPI
5732impersonate_self (SECURITY_IMPERSONATION_LEVEL ImpersonationLevel)
7c80d5ec
EZ		 5733{
5734 static ImpersonateSelf_Proc s_pfn_Impersonate_Self = NULL;
5735 HMODULE hm_advapi32 = NULL;
5736 if (is_windows_9x () == TRUE)
5737 {
5738 return FALSE;
5739 }
5740 if (g_b_init_impersonate_self == 0)
5741 {
5742 g_b_init_impersonate_self = 1;
5743 hm_advapi32 = LoadLibrary ("Advapi32.dll");
5744 s_pfn_Impersonate_Self =
5745 (ImpersonateSelf_Proc) GetProcAddress (hm_advapi32, "ImpersonateSelf");
5746 }
5747 if (s_pfn_Impersonate_Self == NULL)
5748 {
5749 return FALSE;
5750 }
5751 return s_pfn_Impersonate_Self (ImpersonationLevel);
5752}
5753
bedf4aab
JB		 5754static BOOL WINAPI
5755revert_to_self (void)
7c80d5ec
EZ		 5756{
5757 static RevertToSelf_Proc s_pfn_Revert_To_Self = NULL;
5758 HMODULE hm_advapi32 = NULL;
5759 if (is_windows_9x () == TRUE)
5760 {
5761 return FALSE;
5762 }
5763 if (g_b_init_revert_to_self == 0)
5764 {
5765 g_b_init_revert_to_self = 1;
5766 hm_advapi32 = LoadLibrary ("Advapi32.dll");
5767 s_pfn_Revert_To_Self =
5768 (RevertToSelf_Proc) GetProcAddress (hm_advapi32, "RevertToSelf");
5769 }
5770 if (s_pfn_Revert_To_Self == NULL)
5771 {
5772 return FALSE;
5773 }
5774 return s_pfn_Revert_To_Self ();
5775}
5776
bedf4aab
JB		 5777static BOOL WINAPI
5778get_process_memory_info (HANDLE h_proc,
5779 PPROCESS_MEMORY_COUNTERS mem_counters,
5780 DWORD bufsize)
7c80d5ec
EZ		 5781{
5782 static GetProcessMemoryInfo_Proc s_pfn_Get_Process_Memory_Info = NULL;
5783 HMODULE hm_psapi = NULL;
5784 if (is_windows_9x () == TRUE)
5785 {
5786 return FALSE;
5787 }
5788 if (g_b_init_get_process_memory_info == 0)
5789 {
5790 g_b_init_get_process_memory_info = 1;
5791 hm_psapi = LoadLibrary ("Psapi.dll");
5792 if (hm_psapi)
5793 s_pfn_Get_Process_Memory_Info = (GetProcessMemoryInfo_Proc)
5794 GetProcAddress (hm_psapi, "GetProcessMemoryInfo");
5795 }
5796 if (s_pfn_Get_Process_Memory_Info == NULL)
5797 {
5798 return FALSE;
5799 }
5800 return s_pfn_Get_Process_Memory_Info (h_proc, mem_counters, bufsize);
5801}
5802
bedf4aab
JB		 5803static BOOL WINAPI
5804get_process_working_set_size (HANDLE h_proc,
cb576b5c
FP		 5805 PSIZE_T minrss,
5806 PSIZE_T maxrss)
7c80d5ec
EZ		 5807{
5808 static GetProcessWorkingSetSize_Proc
5809 s_pfn_Get_Process_Working_Set_Size = NULL;
5810
5811 if (is_windows_9x () == TRUE)
5812 {
5813 return FALSE;
5814 }
5815 if (g_b_init_get_process_working_set_size == 0)
5816 {
5817 g_b_init_get_process_working_set_size = 1;
5818 s_pfn_Get_Process_Working_Set_Size = (GetProcessWorkingSetSize_Proc)
5819 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5820 "GetProcessWorkingSetSize");
5821 }
5822 if (s_pfn_Get_Process_Working_Set_Size == NULL)
5823 {
5824 return FALSE;
5825 }
5826 return s_pfn_Get_Process_Working_Set_Size (h_proc, minrss, maxrss);
5827}
5828
bedf4aab
JB		 5829static BOOL WINAPI
5830global_memory_status (MEMORYSTATUS *buf)
7c80d5ec
EZ		 5831{
5832 static GlobalMemoryStatus_Proc s_pfn_Global_Memory_Status = NULL;
5833
5834 if (is_windows_9x () == TRUE)
5835 {
5836 return FALSE;
5837 }
5838 if (g_b_init_global_memory_status == 0)
5839 {
5840 g_b_init_global_memory_status = 1;
5841 s_pfn_Global_Memory_Status = (GlobalMemoryStatus_Proc)
5842 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5843 "GlobalMemoryStatus");
5844 }
5845 if (s_pfn_Global_Memory_Status == NULL)
5846 {
5847 return FALSE;
5848 }
5849 return s_pfn_Global_Memory_Status (buf);
5850}
5851
bedf4aab
JB		 5852static BOOL WINAPI
5853global_memory_status_ex (MEMORY_STATUS_EX *buf)
7c80d5ec
EZ		 5854{
5855 static GlobalMemoryStatusEx_Proc s_pfn_Global_Memory_Status_Ex = NULL;
5856
5857 if (is_windows_9x () == TRUE)
5858 {
5859 return FALSE;
5860 }
5861 if (g_b_init_global_memory_status_ex == 0)
5862 {
5863 g_b_init_global_memory_status_ex = 1;
5864 s_pfn_Global_Memory_Status_Ex = (GlobalMemoryStatusEx_Proc)
5865 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5866 "GlobalMemoryStatusEx");
5867 }
5868 if (s_pfn_Global_Memory_Status_Ex == NULL)
5869 {
5870 return FALSE;
5871 }
5872 return s_pfn_Global_Memory_Status_Ex (buf);
5873}
5874
5875Lisp_Object
b56ceb92 5876list_system_processes (void)
7c80d5ec
EZ		 5877{
5878 struct gcpro gcpro1;
5879 Lisp_Object proclist = Qnil;
5880 HANDLE h_snapshot;
5881
5882 h_snapshot = create_toolhelp32_snapshot (TH32CS_SNAPPROCESS, 0);
5883
5884 if (h_snapshot != INVALID_HANDLE_VALUE)
5885 {
5886 PROCESSENTRY32 proc_entry;
5887 DWORD proc_id;
5888 BOOL res;
5889
5890 GCPRO1 (proclist);
5891
5892 proc_entry.dwSize = sizeof (PROCESSENTRY32);
5893 for (res = process32_first (h_snapshot, &proc_entry); res;
5894 res = process32_next (h_snapshot, &proc_entry))
5895 {
5896 proc_id = proc_entry.th32ProcessID;
5897 proclist = Fcons (make_fixnum_or_float (proc_id), proclist);
5898 }
5899
5900 CloseHandle (h_snapshot);
5901 UNGCPRO;
5902 proclist = Fnreverse (proclist);
5903 }
5904
5905 return proclist;
5906}
5907
5908static int
5909enable_privilege (LPCTSTR priv_name, BOOL enable_p, TOKEN_PRIVILEGES *old_priv)
5910{
5911 TOKEN_PRIVILEGES priv;
5912 DWORD priv_size = sizeof (priv);
5913 DWORD opriv_size = sizeof (*old_priv);
5914 HANDLE h_token = NULL;
5915 HANDLE h_thread = GetCurrentThread ();
5916 int ret_val = 0;
5917 BOOL res;
5918
5919 res = open_thread_token (h_thread,
5920 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
5921 FALSE, &h_token);
5922 if (!res && GetLastError () == ERROR_NO_TOKEN)
5923 {
5924 if (impersonate_self (SecurityImpersonation))
5925 res = open_thread_token (h_thread,
5926 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
5927 FALSE, &h_token);
5928 }
5929 if (res)
5930 {
5931 priv.PrivilegeCount = 1;
5932 priv.Privileges[0].Attributes = enable_p ? SE_PRIVILEGE_ENABLED : 0;
5933 LookupPrivilegeValue (NULL, priv_name, &priv.Privileges[0].Luid);
5934 if (AdjustTokenPrivileges (h_token, FALSE, &priv, priv_size,
5935 old_priv, &opriv_size)
5936 && GetLastError () != ERROR_NOT_ALL_ASSIGNED)
5937 ret_val = 1;
5938 }
5939 if (h_token)
5940 CloseHandle (h_token);
5941
5942 return ret_val;
5943}
5944
5945static int
5946restore_privilege (TOKEN_PRIVILEGES *priv)
5947{
5948 DWORD priv_size = sizeof (*priv);
5949 HANDLE h_token = NULL;
5950 int ret_val = 0;
5951
5952 if (open_thread_token (GetCurrentThread (),
5953 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
5954 FALSE, &h_token))
5955 {
5956 if (AdjustTokenPrivileges (h_token, FALSE, priv, priv_size, NULL, NULL)
5957 && GetLastError () != ERROR_NOT_ALL_ASSIGNED)
5958 ret_val = 1;
5959 }
5960 if (h_token)
5961 CloseHandle (h_token);
5962
5963 return ret_val;
5964}
5965
ca300656 5966static Lisp_Object
d35af63c 5967ltime (ULONGLONG time_100ns)
7c80d5ec 5968{
d35af63c
PE		 5969 ULONGLONG time_sec = time_100ns / 10000000;
5970 int subsec = time_100ns % 10000000;
3de717bd
DA		 5971 return list4i (time_sec >> 16, time_sec & 0xffff,
5972 subsec / 10, subsec % 10 * 100000);
7c80d5ec
EZ		 5973}
5974
d35af63c 5975#define U64_TO_LISP_TIME(time) ltime (time)
5da9424d 5976
7c80d5ec 5977static int
b56ceb92
JB		 5978process_times (HANDLE h_proc, Lisp_Object *ctime, Lisp_Object *etime,
5979 Lisp_Object *stime, Lisp_Object *utime, Lisp_Object *ttime,
5980 double *pcpu)
7c80d5ec
EZ		 5981{
5982 FILETIME ft_creation, ft_exit, ft_kernel, ft_user, ft_current;
5da9424d 5983 ULONGLONG tem1, tem2, tem3, tem;
7c80d5ec
EZ		 5984
5985 if (!h_proc
5986 || !get_process_times_fn
ed3751c8
JB		 5987 || !(*get_process_times_fn) (h_proc, &ft_creation, &ft_exit,
5988 &ft_kernel, &ft_user))
7c80d5ec
EZ		 5989 return 0;
5990
5991 GetSystemTimeAsFileTime (&ft_current);
5992
5da9424d 5993 FILETIME_TO_U64 (tem1, ft_kernel);
5da9424d
JB		 5994 *stime = U64_TO_LISP_TIME (tem1);
5995
5996 FILETIME_TO_U64 (tem2, ft_user);
5da9424d
JB		 5997 *utime = U64_TO_LISP_TIME (tem2);
5998
5999 tem3 = tem1 + tem2;
6000 *ttime = U64_TO_LISP_TIME (tem3);
6001
6002 FILETIME_TO_U64 (tem, ft_creation);
3af03101
EZ		 6003 /* Process no 4 (System) returns zero creation time. */
6004 if (tem)
d35af63c 6005 tem -= utc_base;
5da9424d
JB		 6006 *ctime = U64_TO_LISP_TIME (tem);
6007
3af03101 6008 if (tem)
5da9424d
JB		 6009 {
6010 FILETIME_TO_U64 (tem3, ft_current);
d35af63c 6011 tem = (tem3 - utc_base) - tem;
5da9424d
JB		 6012 }
6013 *etime = U64_TO_LISP_TIME (tem);
7c80d5ec 6014
3af03101
EZ		 6015 if (tem)
6016 {
6017 *pcpu = 100.0 * (tem1 + tem2) / tem;
6018 if (*pcpu > 100)
6019 *pcpu = 100.0;
6020 }
6021 else
6022 *pcpu = 0;
6023
6024 return 1;
7c80d5ec
EZ		 6025}
6026
6027Lisp_Object
b56ceb92 6028system_process_attributes (Lisp_Object pid)
7c80d5ec
EZ		 6029{
6030 struct gcpro gcpro1, gcpro2, gcpro3;
6031 Lisp_Object attrs = Qnil;
6032 Lisp_Object cmd_str, decoded_cmd, tem;
6033 HANDLE h_snapshot, h_proc;
6034 DWORD proc_id;
754a2d13 6035 int found_proc = 0;
7c80d5ec 6036 char uname[UNLEN+1], gname[GNLEN+1], domain[1025];
32cef06e 6037 DWORD ulength = sizeof (uname), dlength = sizeof (domain), needed;
7c80d5ec
EZ		 6038 DWORD glength = sizeof (gname);
6039 HANDLE token = NULL;
6040 SID_NAME_USE user_type;
32cef06e
EZ		 6041 unsigned char *buf = NULL;
6042 DWORD blen = 0;
7c80d5ec
EZ		 6043 TOKEN_USER user_token;
6044 TOKEN_PRIMARY_GROUP group_token;
22749e9a
EZ		 6045 unsigned euid;
6046 unsigned egid;
7c80d5ec
EZ		 6047 PROCESS_MEMORY_COUNTERS mem;
6048 PROCESS_MEMORY_COUNTERS_EX mem_ex;
cb576b5c 6049 SIZE_T minrss, maxrss;
7c80d5ec 6050 MEMORYSTATUS memst;
b8526f6e 6051 MEMORY_STATUS_EX memstex;
7c80d5ec 6052 double totphys = 0.0;
031da700 6053 Lisp_Object ctime, stime, utime, etime, ttime;
7c80d5ec 6054 double pcpu;
32cef06e 6055 BOOL result = FALSE;
7c80d5ec
EZ		 6056
6057 CHECK_NUMBER_OR_FLOAT (pid);
6058 proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid);
6059
6060 h_snapshot = create_toolhelp32_snapshot (TH32CS_SNAPPROCESS, 0);
6061
6062 GCPRO3 (attrs, decoded_cmd, tem);
6063
6064 if (h_snapshot != INVALID_HANDLE_VALUE)
6065 {
6066 PROCESSENTRY32 pe;
6067 BOOL res;
6068
6069 pe.dwSize = sizeof (PROCESSENTRY32);
6070 for (res = process32_first (h_snapshot, &pe); res;
6071 res = process32_next (h_snapshot, &pe))
6072 {
6073 if (proc_id == pe.th32ProcessID)
6074 {
6075 if (proc_id == 0)
6076 decoded_cmd = build_string ("Idle");
6077 else
6078 {
6079 /* Decode the command name from locale-specific
6080 encoding. */
309f24d1
DA		 6081 cmd_str = build_unibyte_string (pe.szExeFile);
6082
7c80d5ec
EZ		 6083 decoded_cmd =
6084 code_convert_string_norecord (cmd_str,
6085 Vlocale_coding_system, 0);
6086 }
6087 attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
6088 attrs = Fcons (Fcons (Qppid,
6089 make_fixnum_or_float (pe.th32ParentProcessID)),
6090 attrs);
6091 attrs = Fcons (Fcons (Qpri, make_number (pe.pcPriClassBase)),
6092 attrs);
6093 attrs = Fcons (Fcons (Qthcount,
6094 make_fixnum_or_float (pe.cntThreads)),
6095 attrs);
754a2d13 6096 found_proc = 1;
7c80d5ec
EZ		 6097 break;
6098 }
6099 }
6100
6101 CloseHandle (h_snapshot);
6102 }
6103
754a2d13
EZ		 6104 if (!found_proc)
6105 {
6106 UNGCPRO;
6107 return Qnil;
6108 }
6109
7c80d5ec
EZ		 6110 h_proc = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
6111 FALSE, proc_id);
6112 /* If we were denied a handle to the process, try again after
6113 enabling the SeDebugPrivilege in our process. */
6114 if (!h_proc)
6115 {
6116 TOKEN_PRIVILEGES priv_current;
6117
6118 if (enable_privilege (SE_DEBUG_NAME, TRUE, &priv_current))
6119 {
6120 h_proc = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
6121 FALSE, proc_id);
6122 restore_privilege (&priv_current);
6123 revert_to_self ();
6124 }
6125 }
32cef06e 6126 if (h_proc)
7c80d5ec 6127 {
32cef06e
EZ		 6128 result = open_process_token (h_proc, TOKEN_QUERY, &token);
6129 if (result)
f8b35b24 6130 {
32cef06e
EZ		 6131 result = get_token_information (token, TokenUser, NULL, 0, &blen);
6132 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
6133 {
6134 buf = xmalloc (blen);
6135 result = get_token_information (token, TokenUser,
6136 (LPVOID)buf, blen, &needed);
6137 if (result)
6138 {
6139 memcpy (&user_token, buf, sizeof (user_token));
6140 if (!w32_cached_id (user_token.User.Sid, &euid, uname))
6141 {
6142 euid = get_rid (user_token.User.Sid);
6143 result = lookup_account_sid (NULL, user_token.User.Sid,
6144 uname, &ulength,
6145 domain, &dlength,
6146 &user_type);
6147 if (result)
6148 w32_add_to_cache (user_token.User.Sid, euid, uname);
6149 else
6150 {
6151 strcpy (uname, "unknown");
6152 result = TRUE;
6153 }
6154 }
6155 ulength = strlen (uname);
6156 }
6157 }
7c80d5ec 6158 }
32cef06e 6159 if (result)
7c80d5ec 6160 {
32cef06e
EZ		 6161 /* Determine a reasonable euid and gid values. */
6162 if (xstrcasecmp ("administrator", uname) == 0)
7c80d5ec 6163 {
32cef06e
EZ		 6164 euid = 500; /* well-known Administrator uid */
6165 egid = 513; /* well-known None gid */
6166 }
6167 else
6168 {
6169 /* Get group id and name. */
6170 result = get_token_information (token, TokenPrimaryGroup,
6171 (LPVOID)buf, blen, &needed);
6172 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
f8b35b24 6173 {
32cef06e
EZ		 6174 buf = xrealloc (buf, blen = needed);
6175 result = get_token_information (token, TokenPrimaryGroup,
6176 (LPVOID)buf, blen, &needed);
6177 }
6178 if (result)
6179 {
6180 memcpy (&group_token, buf, sizeof (group_token));
6181 if (!w32_cached_id (group_token.PrimaryGroup, &egid, gname))
6182 {
6183 egid = get_rid (group_token.PrimaryGroup);
6184 dlength = sizeof (domain);
6185 result =
6186 lookup_account_sid (NULL, group_token.PrimaryGroup,
6187 gname, &glength, NULL, &dlength,
6188 &user_type);
6189 if (result)
6190 w32_add_to_cache (group_token.PrimaryGroup,
6191 egid, gname);
6192 else
6193 {
6194 strcpy (gname, "None");
6195 result = TRUE;
6196 }
6197 }
6198 glength = strlen (gname);
f8b35b24 6199 }
7c80d5ec 6200 }
7c80d5ec 6201 }
5f445726 6202 xfree (buf);
7c80d5ec 6203 }
32cef06e 6204 if (!result)
7c80d5ec 6205 {
32cef06e
EZ		 6206 if (!is_windows_9x ())
6207 {
6208 /* We couldn't open the process token, presumably because of
6209 insufficient access rights. Assume this process is run
6210 by the system. */
6211 strcpy (uname, "SYSTEM");
6212 strcpy (gname, "None");
6213 euid = 18; /* SYSTEM */
6214 egid = 513; /* None */
6215 glength = strlen (gname);
6216 ulength = strlen (uname);
6217 }
6218 /* If we are running under Windows 9X, where security calls are
6219 not supported, we assume all processes are run by the current
6220 user. */
6221 else if (GetUserName (uname, &ulength))
6222 {
6223 if (xstrcasecmp ("administrator", uname) == 0)
6224 euid = 0;
6225 else
6226 euid = 123;
6227 egid = euid;
6228 strcpy (gname, "None");
6229 glength = strlen (gname);
6230 ulength = strlen (uname);
6231 }
7c80d5ec 6232 else
32cef06e
EZ		 6233 {
6234 euid = 123;
6235 egid = 123;
6236 strcpy (uname, "administrator");
6237 ulength = strlen (uname);
6238 strcpy (gname, "None");
6239 glength = strlen (gname);
6240 }
6241 if (token)
6242 CloseHandle (token);
7c80d5ec 6243 }
7c80d5ec
EZ		 6244
6245 attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (euid)), attrs);
6246 tem = make_unibyte_string (uname, ulength);
6247 attrs = Fcons (Fcons (Quser,
6248 code_convert_string_norecord (tem, Vlocale_coding_system, 0)),
6249 attrs);
6250 attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (egid)), attrs);
6251 tem = make_unibyte_string (gname, glength);
6252 attrs = Fcons (Fcons (Qgroup,
6253 code_convert_string_norecord (tem, Vlocale_coding_system, 0)),
6254 attrs);
6255
6256 if (global_memory_status_ex (&memstex))
235661f6 6257#if __GNUC__ || (defined (_MSC_VER) && _MSC_VER >= 1300)
7c80d5ec 6258 totphys = memstex.ullTotalPhys / 1024.0;
235661f6
EZ		 6259#else
6260 /* Visual Studio 6 cannot convert an unsigned __int64 type to
6261 double, so we need to do this for it... */
6262 {
6263 DWORD tot_hi = memstex.ullTotalPhys >> 32;
6264 DWORD tot_md = (memstex.ullTotalPhys & 0x00000000ffffffff) >> 10;
6265 DWORD tot_lo = memstex.ullTotalPhys % 1024;
6266
6267 totphys = tot_hi * 4194304.0 + tot_md + tot_lo / 1024.0;
6268 }
6269#endif /* __GNUC__ || _MSC_VER >= 1300 */
7c80d5ec
EZ		 6270 else if (global_memory_status (&memst))
6271 totphys = memst.dwTotalPhys / 1024.0;
6272
6273 if (h_proc
6274 && get_process_memory_info (h_proc, (PROCESS_MEMORY_COUNTERS *)&mem_ex,
6275 sizeof (mem_ex)))
6276 {
cb576b5c 6277 SIZE_T rss = mem_ex.WorkingSetSize / 1024;
7c80d5ec
EZ		 6278
6279 attrs = Fcons (Fcons (Qmajflt,
6280 make_fixnum_or_float (mem_ex.PageFaultCount)),
6281 attrs);
6282 attrs = Fcons (Fcons (Qvsize,
6283 make_fixnum_or_float (mem_ex.PrivateUsage / 1024)),
6284 attrs);
6285 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (rss)), attrs);
6286 if (totphys)
6287 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
6288 }
6289 else if (h_proc
6290 && get_process_memory_info (h_proc, &mem, sizeof (mem)))
6291 {
cb576b5c 6292 SIZE_T rss = mem_ex.WorkingSetSize / 1024;
7c80d5ec
EZ		 6293
6294 attrs = Fcons (Fcons (Qmajflt,
6295 make_fixnum_or_float (mem.PageFaultCount)),
6296 attrs);
6297 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (rss)), attrs);
6298 if (totphys)
6299 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
6300 }
6301 else if (h_proc
6302 && get_process_working_set_size (h_proc, &minrss, &maxrss))
6303 {
6304 DWORD rss = maxrss / 1024;
6305
6306 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (maxrss / 1024)), attrs);
6307 if (totphys)
6308 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
6309 }
6310
031da700 6311 if (process_times (h_proc, &ctime, &etime, &stime, &utime, &ttime, &pcpu))
7c80d5ec
EZ		 6312 {
6313 attrs = Fcons (Fcons (Qutime, utime), attrs);
6314 attrs = Fcons (Fcons (Qstime, stime), attrs);
031da700 6315 attrs = Fcons (Fcons (Qtime, ttime), attrs);
7c80d5ec
EZ		 6316 attrs = Fcons (Fcons (Qstart, ctime), attrs);
6317 attrs = Fcons (Fcons (Qetime, etime), attrs);
6318 attrs = Fcons (Fcons (Qpcpu, make_float (pcpu)), attrs);
6319 }
6320
6321 /* FIXME: Retrieve command line by walking the PEB of the process. */
6322
6323 if (h_proc)
6324 CloseHandle (h_proc);
6325 UNGCPRO;
6326 return attrs;
6327}
6328
6329\f
480b0c5b
GV		 6330/* Wrappers for winsock functions to map between our file descriptors
6331 and winsock's handles; also set h_errno for convenience.
6332
6333 To allow Emacs to run on systems which don't have winsock support
6334 installed, we dynamically link to winsock on startup if present, and
6335 otherwise provide the minimum necessary functionality
6336 (eg. gethostname). */
6337
6338/* function pointers for relevant socket functions */
6339int (PASCAL *pfn_WSAStartup) (WORD wVersionRequired, LPWSADATA lpWSAData);
6340void (PASCAL *pfn_WSASetLastError) (int iError);
6341int (PASCAL *pfn_WSAGetLastError) (void);
26fb7bc4 6342int (PASCAL *pfn_WSAEventSelect) (SOCKET s, HANDLE hEventObject, long lNetworkEvents);
64570b36
KS		 6343HANDLE (PASCAL *pfn_WSACreateEvent) (void);
6344int (PASCAL *pfn_WSACloseEvent) (HANDLE hEvent);
480b0c5b
GV		 6345int (PASCAL *pfn_socket) (int af, int type, int protocol);
6346int (PASCAL *pfn_bind) (SOCKET s, const struct sockaddr *addr, int namelen);
6347int (PASCAL *pfn_connect) (SOCKET s, const struct sockaddr *addr, int namelen);
6348int (PASCAL *pfn_ioctlsocket) (SOCKET s, long cmd, u_long *argp);
6349int (PASCAL *pfn_recv) (SOCKET s, char * buf, int len, int flags);
6350int (PASCAL *pfn_send) (SOCKET s, const char * buf, int len, int flags);
6351int (PASCAL *pfn_closesocket) (SOCKET s);
6352int (PASCAL *pfn_shutdown) (SOCKET s, int how);
6353int (PASCAL *pfn_WSACleanup) (void);
6354
6355u_short (PASCAL *pfn_htons) (u_short hostshort);
6356u_short (PASCAL *pfn_ntohs) (u_short netshort);
6357unsigned long (PASCAL *pfn_inet_addr) (const char * cp);
6358int (PASCAL *pfn_gethostname) (char * name, int namelen);
6359struct hostent * (PASCAL *pfn_gethostbyname) (const char * name);
6360struct servent * (PASCAL *pfn_getservbyname) (const char * name, const char * proto);
ecd270eb 6361int (PASCAL *pfn_getpeername) (SOCKET s, struct sockaddr *addr, int * namelen);
962955c5
JR		 6362int (PASCAL *pfn_setsockopt) (SOCKET s, int level, int optname,
6363 const char * optval, int optlen);
6364int (PASCAL *pfn_listen) (SOCKET s, int backlog);
6365int (PASCAL *pfn_getsockname) (SOCKET s, struct sockaddr * name,
6366 int * namelen);
6367SOCKET (PASCAL *pfn_accept) (SOCKET s, struct sockaddr * addr, int * addrlen);
6368int (PASCAL *pfn_recvfrom) (SOCKET s, char * buf, int len, int flags,
6369 struct sockaddr * from, int * fromlen);
6370int (PASCAL *pfn_sendto) (SOCKET s, const char * buf, int len, int flags,
6371 const struct sockaddr * to, int tolen);
6372
f1614061
RS		 6373/* SetHandleInformation is only needed to make sockets non-inheritable. */
6374BOOL (WINAPI *pfn_SetHandleInformation) (HANDLE object, DWORD mask, DWORD flags);
6375#ifndef HANDLE_FLAG_INHERIT
6376#define HANDLE_FLAG_INHERIT 1
6377#endif
480b0c5b 6378
f249a012
RS		 6379HANDLE winsock_lib;
6380static int winsock_inuse;
480b0c5b 6381
f249a012 6382BOOL
480b0c5b
GV		 6383term_winsock (void)
6384{
f249a012 6385 if (winsock_lib != NULL && winsock_inuse == 0)
480b0c5b 6386 {
3f940c5a 6387 release_listen_threads ();
f249a012
RS		 6388 /* Not sure what would cause WSAENETDOWN, or even if it can happen
6389 after WSAStartup returns successfully, but it seems reasonable
6390 to allow unloading winsock anyway in that case. */
6391 if (pfn_WSACleanup () == 0 ||
6392 pfn_WSAGetLastError () == WSAENETDOWN)
6393 {
6394 if (FreeLibrary (winsock_lib))
6395 winsock_lib = NULL;
6396 return TRUE;
6397 }
480b0c5b 6398 }
f249a012 6399 return FALSE;
480b0c5b
GV		 6400}
6401
f249a012
RS		 6402BOOL
6403init_winsock (int load_now)
480b0c5b
GV		 6404{
6405 WSADATA winsockData;
6406
f249a012
RS		 6407 if (winsock_lib != NULL)
6408 return TRUE;
f1614061 6409
f1614061
RS		 6410 pfn_SetHandleInformation
6411 = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"),
6412 "SetHandleInformation");
6413
64570b36 6414 winsock_lib = LoadLibrary ("Ws2_32.dll");
480b0c5b
GV		 6415
6416 if (winsock_lib != NULL)
6417 {
6418 /* dynamically link to socket functions */
6419
6420#define LOAD_PROC(fn) \
6421 if ((pfn_##fn = (void *) GetProcAddress (winsock_lib, #fn)) == NULL) \
6422 goto fail;
6423
ed3751c8
JB		 6424 LOAD_PROC (WSAStartup);
6425 LOAD_PROC (WSASetLastError);
6426 LOAD_PROC (WSAGetLastError);
6427 LOAD_PROC (WSAEventSelect);
6428 LOAD_PROC (WSACreateEvent);
6429 LOAD_PROC (WSACloseEvent);
6430 LOAD_PROC (socket);
6431 LOAD_PROC (bind);
6432 LOAD_PROC (connect);
6433 LOAD_PROC (ioctlsocket);
6434 LOAD_PROC (recv);
6435 LOAD_PROC (send);
6436 LOAD_PROC (closesocket);
6437 LOAD_PROC (shutdown);
6438 LOAD_PROC (htons);
6439 LOAD_PROC (ntohs);
6440 LOAD_PROC (inet_addr);
6441 LOAD_PROC (gethostname);
6442 LOAD_PROC (gethostbyname);
6443 LOAD_PROC (getservbyname);
6444 LOAD_PROC (getpeername);
6445 LOAD_PROC (WSACleanup);
6446 LOAD_PROC (setsockopt);
6447 LOAD_PROC (listen);
6448 LOAD_PROC (getsockname);
6449 LOAD_PROC (accept);
6450 LOAD_PROC (recvfrom);
6451 LOAD_PROC (sendto);
f249a012
RS		 6452#undef LOAD_PROC
6453
480b0c5b
GV		 6454 /* specify version 1.1 of winsock */
6455 if (pfn_WSAStartup (0x101, &winsockData) == 0)
6456 {
f249a012
RS		 6457 if (winsockData.wVersion != 0x101)
6458 goto fail;
6459
6460 if (!load_now)
6461 {
6462 /* Report that winsock exists and is usable, but leave
6463 socket functions disabled. I am assuming that calling
6464 WSAStartup does not require any network interaction,
6465 and in particular does not cause or require a dial-up
6466 connection to be established. */
6467
6468 pfn_WSACleanup ();
6469 FreeLibrary (winsock_lib);
6470 winsock_lib = NULL;
6471 }
6472 winsock_inuse = 0;
6473 return TRUE;
480b0c5b
GV		 6474 }
6475
6476 fail:
6477 FreeLibrary (winsock_lib);
f249a012 6478 winsock_lib = NULL;
480b0c5b 6479 }
f249a012
RS		 6480
6481 return FALSE;
480b0c5b
GV		 6482}
6483
6484
6485int h_errno = 0;
6486
f277993b
EZ		 6487/* Function to map winsock error codes to errno codes for those errno
6488 code defined in errno.h (errno values not defined by errno.h are
6489 already in nt/inc/sys/socket.h). */
9bfb11f9 6490static void
b56ceb92 6491set_errno (void)
480b0c5b 6492{
f277993b
EZ		 6493 int wsa_err;
6494
6495 h_errno = 0;
f249a012 6496 if (winsock_lib == NULL)
f277993b 6497 wsa_err = EINVAL;
480b0c5b 6498 else
f277993b 6499 wsa_err = pfn_WSAGetLastError ();
480b0c5b 6500
f277993b 6501 switch (wsa_err)
480b0c5b 6502 {
f277993b
EZ		 6503 case WSAEACCES: errno = EACCES; break;
6504 case WSAEBADF: errno = EBADF; break;
6505 case WSAEFAULT: errno = EFAULT; break;
6506 case WSAEINTR: errno = EINTR; break;
6507 case WSAEINVAL: errno = EINVAL; break;
6508 case WSAEMFILE: errno = EMFILE; break;
6509 case WSAENAMETOOLONG: errno = ENAMETOOLONG; break;
6510 case WSAENOTEMPTY: errno = ENOTEMPTY; break;
6511 default: errno = wsa_err; break;
480b0c5b 6512 }
480b0c5b
GV		 6513}
6514
9bfb11f9 6515static void
b56ceb92 6516check_errno (void)
480b0c5b 6517{
f277993b
EZ		 6518 h_errno = 0;
6519 if (winsock_lib != NULL)
480b0c5b
GV		 6520 pfn_WSASetLastError (0);
6521}
6522
d8fcc1b9
AI		 6523/* Extend strerror to handle the winsock-specific error codes. */
6524struct {
6525 int errnum;
6526 char * msg;
6527} _wsa_errlist[] = {
1db5b1ad
JB		 6528 {WSAEINTR , "Interrupted function call"},
6529 {WSAEBADF , "Bad file descriptor"},
6530 {WSAEACCES , "Permission denied"},
6531 {WSAEFAULT , "Bad address"},
6532 {WSAEINVAL , "Invalid argument"},
6533 {WSAEMFILE , "Too many open files"},
6534
6535 {WSAEWOULDBLOCK , "Resource temporarily unavailable"},
6536 {WSAEINPROGRESS , "Operation now in progress"},
6537 {WSAEALREADY , "Operation already in progress"},
6538 {WSAENOTSOCK , "Socket operation on non-socket"},
6539 {WSAEDESTADDRREQ , "Destination address required"},
6540 {WSAEMSGSIZE , "Message too long"},
6541 {WSAEPROTOTYPE , "Protocol wrong type for socket"},
6542 {WSAENOPROTOOPT , "Bad protocol option"},
6543 {WSAEPROTONOSUPPORT , "Protocol not supported"},
6544 {WSAESOCKTNOSUPPORT , "Socket type not supported"},
6545 {WSAEOPNOTSUPP , "Operation not supported"},
6546 {WSAEPFNOSUPPORT , "Protocol family not supported"},
6547 {WSAEAFNOSUPPORT , "Address family not supported by protocol family"},
6548 {WSAEADDRINUSE , "Address already in use"},
6549 {WSAEADDRNOTAVAIL , "Cannot assign requested address"},
6550 {WSAENETDOWN , "Network is down"},
6551 {WSAENETUNREACH , "Network is unreachable"},
6552 {WSAENETRESET , "Network dropped connection on reset"},
6553 {WSAECONNABORTED , "Software caused connection abort"},
6554 {WSAECONNRESET , "Connection reset by peer"},
6555 {WSAENOBUFS , "No buffer space available"},
6556 {WSAEISCONN , "Socket is already connected"},
6557 {WSAENOTCONN , "Socket is not connected"},
6558 {WSAESHUTDOWN , "Cannot send after socket shutdown"},
6559 {WSAETOOMANYREFS , "Too many references"}, /* not sure */
6560 {WSAETIMEDOUT , "Connection timed out"},
6561 {WSAECONNREFUSED , "Connection refused"},
6562 {WSAELOOP , "Network loop"}, /* not sure */
6563 {WSAENAMETOOLONG , "Name is too long"},
6564 {WSAEHOSTDOWN , "Host is down"},
6565 {WSAEHOSTUNREACH , "No route to host"},
6566 {WSAENOTEMPTY , "Buffer not empty"}, /* not sure */
6567 {WSAEPROCLIM , "Too many processes"},
6568 {WSAEUSERS , "Too many users"}, /* not sure */
6569 {WSAEDQUOT , "Double quote in host name"}, /* really not sure */
6570 {WSAESTALE , "Data is stale"}, /* not sure */
6571 {WSAEREMOTE , "Remote error"}, /* not sure */
6572
6573 {WSASYSNOTREADY , "Network subsystem is unavailable"},
6574 {WSAVERNOTSUPPORTED , "WINSOCK.DLL version out of range"},
6575 {WSANOTINITIALISED , "Winsock not initialized successfully"},
6576 {WSAEDISCON , "Graceful shutdown in progress"},
d8fcc1b9 6577#ifdef WSAENOMORE
1db5b1ad
JB		 6578 {WSAENOMORE , "No more operations allowed"}, /* not sure */
6579 {WSAECANCELLED , "Operation cancelled"}, /* not sure */
6580 {WSAEINVALIDPROCTABLE , "Invalid procedure table from service provider"},
6581 {WSAEINVALIDPROVIDER , "Invalid service provider version number"},
6582 {WSAEPROVIDERFAILEDINIT , "Unable to initialize a service provider"},
6583 {WSASYSCALLFAILURE , "System call failure"},
6584 {WSASERVICE_NOT_FOUND , "Service not found"}, /* not sure */
6585 {WSATYPE_NOT_FOUND , "Class type not found"},
6586 {WSA_E_NO_MORE , "No more resources available"}, /* really not sure */
6587 {WSA_E_CANCELLED , "Operation already cancelled"}, /* really not sure */
6588 {WSAEREFUSED , "Operation refused"}, /* not sure */
d8fcc1b9 6589#endif
177c0ea7 6590
1db5b1ad
JB		 6591 {WSAHOST_NOT_FOUND , "Host not found"},
6592 {WSATRY_AGAIN , "Authoritative host not found during name lookup"},
6593 {WSANO_RECOVERY , "Non-recoverable error during name lookup"},
6594 {WSANO_DATA , "Valid name, no data record of requested type"},
d8fcc1b9 6595
1db5b1ad 6596 {-1, NULL}
d8fcc1b9
AI		 6597};
6598
6599char *
ed3751c8 6600sys_strerror (int error_no)
d8fcc1b9
AI		 6601{
6602 int i;
6603 static char unknown_msg[40];
6604
a302c7ae
AI		 6605 if (error_no >= 0 && error_no < sys_nerr)
6606 return sys_errlist[error_no];
d8fcc1b9
AI		 6607
6608 for (i = 0; _wsa_errlist[i].errnum >= 0; i++)
6609 if (_wsa_errlist[i].errnum == error_no)
6610 return _wsa_errlist[i].msg;
6611
ed3751c8 6612 sprintf (unknown_msg, "Unidentified error: %d", error_no);
d8fcc1b9
AI		 6613 return unknown_msg;
6614}
6615
480b0c5b
GV		 6616/* [andrewi 3-May-96] I've had conflicting results using both methods,
6617 but I believe the method of keeping the socket handle separate (and
6618 insuring it is not inheritable) is the correct one. */
6619
480b0c5b 6620#define SOCK_HANDLE(fd) ((SOCKET) fd_info[fd].hnd)
480b0c5b 6621
bedf4aab 6622static int socket_to_fd (SOCKET s);
962955c5 6623
480b0c5b 6624int
ed3751c8 6625sys_socket (int af, int type, int protocol)
480b0c5b 6626{
962955c5 6627 SOCKET s;
480b0c5b 6628
f249a012 6629 if (winsock_lib == NULL)
480b0c5b 6630 {
f277993b 6631 errno = ENETDOWN;
480b0c5b
GV		 6632 return INVALID_SOCKET;
6633 }
6634
6635 check_errno ();
6636
6637 /* call the real socket function */
962955c5 6638 s = pfn_socket (af, type, protocol);
177c0ea7 6639
480b0c5b 6640 if (s != INVALID_SOCKET)
f277993b 6641 return socket_to_fd (s);
480b0c5b 6642
962955c5
JR		 6643 set_errno ();
6644 return -1;
6645}
6646
6647/* Convert a SOCKET to a file descriptor. */
bedf4aab 6648static int
962955c5
JR		 6649socket_to_fd (SOCKET s)
6650{
6651 int fd;
6652 child_process * cp;
6653
6654 /* Although under NT 3.5 _open_osfhandle will accept a socket
6655 handle, if opened with SO_OPENTYPE == SO_SYNCHRONOUS_NONALERT,
6656 that does not work under NT 3.1. However, we can get the same
6657 effect by using a backdoor function to replace an existing
6658 descriptor handle with the one we want. */
6659
6660 /* allocate a file descriptor (with appropriate flags) */
6661 fd = _open ("NUL:", _O_RDWR);
6662 if (fd >= 0)
6663 {
962955c5
JR		 6664 /* Make a non-inheritable copy of the socket handle. Note
6665 that it is possible that sockets aren't actually kernel
6666 handles, which appears to be the case on Windows 9x when
6667 the MS Proxy winsock client is installed. */
6668 {
6669 /* Apparently there is a bug in NT 3.51 with some service
6670 packs, which prevents using DuplicateHandle to make a
6671 socket handle non-inheritable (causes WSACleanup to
6672 hang). The work-around is to use SetHandleInformation
6673 instead if it is available and implemented. */
6674 if (pfn_SetHandleInformation)
480b0c5b 6675 {
962955c5
JR		 6676 pfn_SetHandleInformation ((HANDLE) s, HANDLE_FLAG_INHERIT, 0);
6677 }
6678 else
6679 {
6680 HANDLE parent = GetCurrentProcess ();
6681 HANDLE new_s = INVALID_HANDLE_VALUE;
6682
6683 if (DuplicateHandle (parent,
6684 (HANDLE) s,
6685 parent,
6686 &new_s,
6687 0,
6688 FALSE,
6689 DUPLICATE_SAME_ACCESS))
f1614061 6690 {
962955c5
JR		 6691 /* It is possible that DuplicateHandle succeeds even
6692 though the socket wasn't really a kernel handle,
6693 because a real handle has the same value. So
6694 test whether the new handle really is a socket. */
6695 long nonblocking = 0;
6696 if (pfn_ioctlsocket ((SOCKET) new_s, FIONBIO, &nonblocking) == 0)
ca149beb 6697 {
962955c5
JR		 6698 pfn_closesocket (s);
6699 s = (SOCKET) new_s;
6700 }
6701 else
6702 {
6703 CloseHandle (new_s);
6704 }
177c0ea7 6705 }
480b0c5b 6706 }
962955c5 6707 }
bcf7fe2a 6708 eassert (fd < MAXDESC);
962955c5 6709 fd_info[fd].hnd = (HANDLE) s;
480b0c5b 6710
962955c5
JR		 6711 /* set our own internal flags */
6712 fd_info[fd].flags = FILE_SOCKET | FILE_BINARY | FILE_READ | FILE_WRITE;
480b0c5b 6713
962955c5
JR		 6714 cp = new_child ();
6715 if (cp)
6716 {
6717 cp->fd = fd;
6718 cp->status = STATUS_READ_ACKNOWLEDGED;
480b0c5b 6719
962955c5
JR		 6720 /* attach child_process to fd_info */
6721 if (fd_info[ fd ].cp != NULL)
6722 {
6723 DebPrint (("sys_socket: fd_info[%d] apparently in use!\n", fd));
1088b922 6724 emacs_abort ();
480b0c5b
GV		 6725 }
6726
962955c5
JR		 6727 fd_info[ fd ].cp = cp;
6728
6729 /* success! */
6730 winsock_inuse++; /* count open sockets */
6731 return fd;
480b0c5b 6732 }
480b0c5b 6733
962955c5
JR		 6734 /* clean up */
6735 _close (fd);
6736 }
f277993b 6737 else
962955c5 6738 pfn_closesocket (s);
f277993b 6739 errno = EMFILE;
480b0c5b
GV		 6740 return -1;
6741}
6742
480b0c5b
GV		 6743int
6744sys_bind (int s, const struct sockaddr * addr, int namelen)
6745{
f249a012 6746 if (winsock_lib == NULL)
480b0c5b 6747 {
f277993b 6748 errno = ENOTSOCK;
480b0c5b
GV		 6749 return SOCKET_ERROR;
6750 }
6751
6752 check_errno ();
6753 if (fd_info[s].flags & FILE_SOCKET)
6754 {
6755 int rc = pfn_bind (SOCK_HANDLE (s), addr, namelen);
6756 if (rc == SOCKET_ERROR)
6757 set_errno ();
6758 return rc;
6759 }
f277993b 6760 errno = ENOTSOCK;
480b0c5b
GV		 6761 return SOCKET_ERROR;
6762}
6763
480b0c5b
GV		 6764int
6765sys_connect (int s, const struct sockaddr * name, int namelen)
6766{
f249a012 6767 if (winsock_lib == NULL)
480b0c5b 6768 {
f277993b 6769 errno = ENOTSOCK;
480b0c5b
GV		 6770 return SOCKET_ERROR;
6771 }
6772
6773 check_errno ();
6774 if (fd_info[s].flags & FILE_SOCKET)
6775 {
6776 int rc = pfn_connect (SOCK_HANDLE (s), name, namelen);
6777 if (rc == SOCKET_ERROR)
6778 set_errno ();
6779 return rc;
6780 }
f277993b 6781 errno = ENOTSOCK;
480b0c5b
GV		 6782 return SOCKET_ERROR;
6783}
6784
6785u_short
6786sys_htons (u_short hostshort)
6787{
f249a012 6788 return (winsock_lib != NULL) ?
480b0c5b
GV		 6789 pfn_htons (hostshort) : hostshort;
6790}
6791
6792u_short
6793sys_ntohs (u_short netshort)
6794{
f249a012 6795 return (winsock_lib != NULL) ?
480b0c5b
GV		 6796 pfn_ntohs (netshort) : netshort;
6797}
6798
6799unsigned long
6800sys_inet_addr (const char * cp)
6801{
f249a012 6802 return (winsock_lib != NULL) ?
480b0c5b
GV		 6803 pfn_inet_addr (cp) : INADDR_NONE;
6804}
6805
6806int
6807sys_gethostname (char * name, int namelen)
6808{
f249a012 6809 if (winsock_lib != NULL)
f277993b
EZ		 6810 {
6811 int retval;
6812
6813 check_errno ();
6814 retval = pfn_gethostname (name, namelen);
6815 if (retval == SOCKET_ERROR)
6816 set_errno ();
6817 return retval;
6818 }
480b0c5b
GV		 6819
6820 if (namelen > MAX_COMPUTERNAME_LENGTH)
a302c7ae 6821 return !GetComputerName (name, (DWORD *)&namelen);
480b0c5b 6822
f277993b 6823 errno = EFAULT;
480b0c5b
GV		 6824 return SOCKET_ERROR;
6825}
6826
6827struct hostent *
ed3751c8 6828sys_gethostbyname (const char * name)
480b0c5b
GV		 6829{
6830 struct hostent * host;
f277993b 6831 int h_err = h_errno;
480b0c5b 6832
f249a012 6833 if (winsock_lib == NULL)
480b0c5b 6834 {
f277993b
EZ		 6835 h_errno = NO_RECOVERY;
6836 errno = ENETDOWN;
480b0c5b
GV		 6837 return NULL;
6838 }
6839
6840 check_errno ();
6841 host = pfn_gethostbyname (name);
6842 if (!host)
f277993b
EZ		 6843 {
6844 set_errno ();
6845 h_errno = errno;
6846 }
6847 else
6848 h_errno = h_err;
480b0c5b
GV		 6849 return host;
6850}
6851
6852struct servent *
ed3751c8 6853sys_getservbyname (const char * name, const char * proto)
480b0c5b
GV		 6854{
6855 struct servent * serv;
6856
f249a012 6857 if (winsock_lib == NULL)
480b0c5b 6858 {
f277993b 6859 errno = ENETDOWN;
480b0c5b
GV		 6860 return NULL;
6861 }
6862
6863 check_errno ();
6864 serv = pfn_getservbyname (name, proto);
6865 if (!serv)
6866 set_errno ();
6867 return serv;
6868}
6869
ecd270eb
JR		 6870int
6871sys_getpeername (int s, struct sockaddr *addr, int * namelen)
6872{
6873 if (winsock_lib == NULL)
6874 {
f277993b 6875 errno = ENETDOWN;
ecd270eb
JR		 6876 return SOCKET_ERROR;
6877 }
6878
6879 check_errno ();
6880 if (fd_info[s].flags & FILE_SOCKET)
6881 {
6882 int rc = pfn_getpeername (SOCK_HANDLE (s), addr, namelen);
6883 if (rc == SOCKET_ERROR)
6884 set_errno ();
6885 return rc;
6886 }
f277993b 6887 errno = ENOTSOCK;
ecd270eb
JR		 6888 return SOCKET_ERROR;
6889}
6890
380961a6
GV		 6891int
6892sys_shutdown (int s, int how)
6893{
380961a6
GV		 6894 if (winsock_lib == NULL)
6895 {
f277993b 6896 errno = ENETDOWN;
380961a6
GV		 6897 return SOCKET_ERROR;
6898 }
6899
6900 check_errno ();
6901 if (fd_info[s].flags & FILE_SOCKET)
6902 {
6903 int rc = pfn_shutdown (SOCK_HANDLE (s), how);
962955c5
JR		 6904 if (rc == SOCKET_ERROR)
6905 set_errno ();
6906 return rc;
6907 }
f277993b 6908 errno = ENOTSOCK;
962955c5
JR		 6909 return SOCKET_ERROR;
6910}
6911
6912int
a5a389bb 6913sys_setsockopt (int s, int level, int optname, const void * optval, int optlen)
962955c5
JR		 6914{
6915 if (winsock_lib == NULL)
6916 {
f277993b 6917 errno = ENETDOWN;
962955c5
JR		 6918 return SOCKET_ERROR;
6919 }
6920
6921 check_errno ();
6922 if (fd_info[s].flags & FILE_SOCKET)
6923 {
6924 int rc = pfn_setsockopt (SOCK_HANDLE (s), level, optname,
a5a389bb 6925 (const char *)optval, optlen);
962955c5
JR		 6926 if (rc == SOCKET_ERROR)
6927 set_errno ();
6928 return rc;
6929 }
f277993b 6930 errno = ENOTSOCK;
177c0ea7 6931 return SOCKET_ERROR;
962955c5
JR		 6932}
6933
6934int
6935sys_listen (int s, int backlog)
6936{
6937 if (winsock_lib == NULL)
6938 {
f277993b 6939 errno = ENETDOWN;
962955c5
JR		 6940 return SOCKET_ERROR;
6941 }
6942
6943 check_errno ();
6944 if (fd_info[s].flags & FILE_SOCKET)
6945 {
6946 int rc = pfn_listen (SOCK_HANDLE (s), backlog);
6947 if (rc == SOCKET_ERROR)
6948 set_errno ();
26fb7bc4 6949 else
64570b36 6950 fd_info[s].flags |= FILE_LISTEN;
962955c5
JR		 6951 return rc;
6952 }
f277993b 6953 errno = ENOTSOCK;
177c0ea7 6954 return SOCKET_ERROR;
962955c5
JR		 6955}
6956
6957int
6958sys_getsockname (int s, struct sockaddr * name, int * namelen)
6959{
6960 if (winsock_lib == NULL)
6961 {
f277993b 6962 errno = ENETDOWN;
962955c5
JR		 6963 return SOCKET_ERROR;
6964 }
6965
6966 check_errno ();
6967 if (fd_info[s].flags & FILE_SOCKET)
6968 {
6969 int rc = pfn_getsockname (SOCK_HANDLE (s), name, namelen);
6970 if (rc == SOCKET_ERROR)
6971 set_errno ();
6972 return rc;
6973 }
f277993b 6974 errno = ENOTSOCK;
177c0ea7 6975 return SOCKET_ERROR;
962955c5
JR		 6976}
6977
6978int
6979sys_accept (int s, struct sockaddr * addr, int * addrlen)
6980{
6981 if (winsock_lib == NULL)
6982 {
f277993b 6983 errno = ENETDOWN;
962955c5
JR		 6984 return -1;
6985 }
6986
6987 check_errno ();
26fb7bc4 6988 if (fd_info[s].flags & FILE_LISTEN)
962955c5 6989 {
a0ad1860 6990 SOCKET t = pfn_accept (SOCK_HANDLE (s), addr, addrlen);
64570b36
KS		 6991 int fd = -1;
6992 if (t == INVALID_SOCKET)
6993 set_errno ();
6994 else
f277993b 6995 fd = socket_to_fd (t);
962955c5 6996
bcf7fe2a
EZ		 6997 if (fd >= 0)
6998 {
6999 fd_info[s].cp->status = STATUS_READ_ACKNOWLEDGED;
7000 ResetEvent (fd_info[s].cp->char_avail);
7001 }
64570b36 7002 return fd;
962955c5 7003 }
f277993b 7004 errno = ENOTSOCK;
962955c5
JR		 7005 return -1;
7006}
7007
7008int
7009sys_recvfrom (int s, char * buf, int len, int flags,
b56ceb92 7010 struct sockaddr * from, int * fromlen)
962955c5
JR		 7011{
7012 if (winsock_lib == NULL)
7013 {
f277993b 7014 errno = ENETDOWN;
962955c5
JR		 7015 return SOCKET_ERROR;
7016 }
7017
7018 check_errno ();
7019 if (fd_info[s].flags & FILE_SOCKET)
7020 {
7021 int rc = pfn_recvfrom (SOCK_HANDLE (s), buf, len, flags, from, fromlen);
7022 if (rc == SOCKET_ERROR)
7023 set_errno ();
7024 return rc;
7025 }
f277993b 7026 errno = ENOTSOCK;
962955c5
JR		 7027 return SOCKET_ERROR;
7028}
7029
7030int
7031sys_sendto (int s, const char * buf, int len, int flags,
7032 const struct sockaddr * to, int tolen)
7033{
7034 if (winsock_lib == NULL)
7035 {
f277993b 7036 errno = ENETDOWN;
962955c5
JR		 7037 return SOCKET_ERROR;
7038 }
7039
7040 check_errno ();
7041 if (fd_info[s].flags & FILE_SOCKET)
7042 {
7043 int rc = pfn_sendto (SOCK_HANDLE (s), buf, len, flags, to, tolen);
380961a6
GV		 7044 if (rc == SOCKET_ERROR)
7045 set_errno ();
7046 return rc;
7047 }
f277993b 7048 errno = ENOTSOCK;
380961a6
GV		 7049 return SOCKET_ERROR;
7050}
7051
ecd270eb 7052/* Windows does not have an fcntl function. Provide an implementation
067428c1 7053 good enough for Emacs. */
ecd270eb
JR		 7054int
7055fcntl (int s, int cmd, int options)
7056{
067428c1
PE		 7057 /* In the w32 Emacs port, fcntl (fd, F_DUPFD_CLOEXEC, fd1) is always
7058 invoked in a context where fd1 is closed and all descriptors less
7059 than fd1 are open, so sys_dup is an adequate implementation. */
7060 if (cmd == F_DUPFD_CLOEXEC)
7061 return sys_dup (s);
7062
ecd270eb
JR		 7063 if (winsock_lib == NULL)
7064 {
f277993b 7065 errno = ENETDOWN;
ecd270eb
JR		 7066 return -1;
7067 }
7068
7069 check_errno ();
7070 if (fd_info[s].flags & FILE_SOCKET)
7071 {
49cdacda 7072 if (cmd == F_SETFL && options == O_NONBLOCK)
ecd270eb
JR		 7073 {
7074 unsigned long nblock = 1;
7075 int rc = pfn_ioctlsocket (SOCK_HANDLE (s), FIONBIO, &nblock);
7076 if (rc == SOCKET_ERROR)
9d4f32e8 7077 set_errno ();
ecd270eb
JR		 7078 /* Keep track of the fact that we set this to non-blocking. */
7079 fd_info[s].flags |= FILE_NDELAY;
7080 return rc;
7081 }
7082 else
7083 {
f277993b 7084 errno = EINVAL;
ecd270eb
JR		 7085 return SOCKET_ERROR;
7086 }
7087 }
f277993b 7088 errno = ENOTSOCK;
ecd270eb
JR		 7089 return SOCKET_ERROR;
7090}
7091
480b0c5b
GV		 7092
7093/* Shadow main io functions: we need to handle pipes and sockets more
7094 intelligently, and implement non-blocking mode as well. */
7095
7096int
7097sys_close (int fd)
7098{
7099 int rc;
7100
7559f399 7101 if (fd < 0)
480b0c5b
GV		 7102 {
7103 errno = EBADF;
7104 return -1;
7105 }
7106
7559f399 7107 if (fd < MAXDESC && fd_info[fd].cp)
480b0c5b
GV		 7108 {
7109 child_process * cp = fd_info[fd].cp;
7110
7111 fd_info[fd].cp = NULL;
7112
7113 if (CHILD_ACTIVE (cp))
7114 {
7115 /* if last descriptor to active child_process then cleanup */
7116 int i;
7117 for (i = 0; i < MAXDESC; i++)
7118 {
7119 if (i == fd)
7120 continue;
7121 if (fd_info[i].cp == cp)
7122 break;
7123 }
7124 if (i == MAXDESC)
7125 {
480b0c5b
GV		 7126 if (fd_info[fd].flags & FILE_SOCKET)
7127 {
1088b922 7128 if (winsock_lib == NULL) emacs_abort ();
480b0c5b
GV		 7129
7130 pfn_shutdown (SOCK_HANDLE (fd), 2);
7131 rc = pfn_closesocket (SOCK_HANDLE (fd));
7d701334 7132
f249a012 7133 winsock_inuse--; /* count open sockets */
480b0c5b 7134 }
299614f3
EZ		 7135 /* If the process handle is NULL, it's either a socket
7136 or serial connection, or a subprocess that was
7137 already reaped by reap_subprocess, but whose
7138 resources were not yet freed, because its output was
7139 not fully read yet by the time it was reaped. (This
7140 usually happens with async subprocesses whose output
7141 is being read by Emacs.) Otherwise, this process was
7142 not reaped yet, so we set its FD to a negative value
7143 to make sure sys_select will eventually get to
7144 calling the SIGCHLD handler for it, which will then
7145 invoke waitpid and reap_subprocess. */
7146 if (cp->procinfo.hProcess == NULL)
7147 delete_child (cp);
7148 else
7149 cp->fd = -1;
480b0c5b
GV		 7150 }
7151 }
7152 }
7153
224f4ec1
EZ		 7154 if (fd >= 0 && fd < MAXDESC)
7155 fd_info[fd].flags = 0;
7156
480b0c5b 7157 /* Note that sockets do not need special treatment here (at least on
e9e23e23 7158 NT and Windows 95 using the standard tcp/ip stacks) - it appears that
480b0c5b
GV		 7159 closesocket is equivalent to CloseHandle, which is to be expected
7160 because socket handles are fully fledged kernel handles. */
7161 rc = _close (fd);
7162
480b0c5b
GV		 7163 return rc;
7164}
7165
7166int
7167sys_dup (int fd)
7168{
7169 int new_fd;
7170
7171 new_fd = _dup (fd);
7559f399 7172 if (new_fd >= 0 && new_fd < MAXDESC)
480b0c5b
GV		 7173 {
7174 /* duplicate our internal info as well */
7175 fd_info[new_fd] = fd_info[fd];
7176 }
7177 return new_fd;
7178}
7179
480b0c5b
GV		 7180int
7181sys_dup2 (int src, int dst)
7182{
7183 int rc;
7184
7185 if (dst < 0 || dst >= MAXDESC)
7186 {
7187 errno = EBADF;
7188 return -1;
7189 }
7190
7191 /* make sure we close the destination first if it's a pipe or socket */
7192 if (src != dst && fd_info[dst].flags != 0)
7193 sys_close (dst);
177c0ea7 7194
480b0c5b
GV		 7195 rc = _dup2 (src, dst);
7196 if (rc == 0)
7197 {
7198 /* duplicate our internal info as well */
7199 fd_info[dst] = fd_info[src];
7200 }
7201 return rc;
7202}
7203
480b0c5b 7204int
067428c1 7205pipe2 (int * phandles, int pipe2_flags)
480b0c5b
GV		 7206{
7207 int rc;
7208 unsigned flags;
480b0c5b 7209
067428c1
PE		 7210 eassert (pipe2_flags == O_CLOEXEC);
7211
76b3903d
GV		 7212 /* make pipe handles non-inheritable; when we spawn a child, we
7213 replace the relevant handle with an inheritable one. Also put
7214 pipes into binary mode; we will do text mode translation ourselves
7215 if required. */
7216 rc = _pipe (phandles, 0, _O_NOINHERIT | _O_BINARY);
480b0c5b
GV		 7217
7218 if (rc == 0)
7219 {
cb72110d
JR		 7220 /* Protect against overflow, since Windows can open more handles than
7221 our fd_info array has room for. */
7222 if (phandles[0] >= MAXDESC || phandles[1] >= MAXDESC)
7223 {
7224 _close (phandles[0]);
7225 _close (phandles[1]);
6e432f0c 7226 errno = EMFILE;
cb72110d
JR		 7227 rc = -1;
7228 }
7229 else
7230 {
7231 flags = FILE_PIPE | FILE_READ | FILE_BINARY;
7232 fd_info[phandles[0]].flags = flags;
480b0c5b 7233
cb72110d
JR		 7234 flags = FILE_PIPE | FILE_WRITE | FILE_BINARY;
7235 fd_info[phandles[1]].flags = flags;
7236 }
480b0c5b
GV		 7237 }
7238
7239 return rc;
7240}
7241
7242/* Function to do blocking read of one byte, needed to implement
d3d14b40
EZ		 7243 select. It is only allowed on communication ports, sockets, or
7244 pipes. */
480b0c5b
GV		 7245int
7246_sys_read_ahead (int fd)
7247{
7248 child_process * cp;
7249 int rc;
7250
7251 if (fd < 0 || fd >= MAXDESC)
7252 return STATUS_READ_ERROR;
7253
7254 cp = fd_info[fd].cp;
7255
7256 if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY)
7257 return STATUS_READ_ERROR;
7258
d888760c 7259 if ((fd_info[fd].flags & (FILE_PIPE | FILE_SERIAL | FILE_SOCKET)) == 0
480b0c5b
GV		 7260 || (fd_info[fd].flags & FILE_READ) == 0)
7261 {
d888760c 7262 DebPrint (("_sys_read_ahead: internal error: fd %d is not a pipe, serial port, or socket!\n", fd));
1088b922 7263 emacs_abort ();
480b0c5b 7264 }
177c0ea7 7265
480b0c5b 7266 cp->status = STATUS_READ_IN_PROGRESS;
177c0ea7 7267
480b0c5b 7268 if (fd_info[fd].flags & FILE_PIPE)
f7554349 7269 {
f7554349
KH		 7270 rc = _read (fd, &cp->chr, sizeof (char));
7271
7272 /* Give subprocess time to buffer some more output for us before
e9e23e23 7273 reporting that input is available; we need this because Windows 95
f7554349
KH		 7274 connects DOS programs to pipes by making the pipe appear to be
7275 the normal console stdout - as a result most DOS programs will
d888760c 7276 write to stdout without buffering, ie. one character at a
fbd6baed 7277 time. Even some W32 programs do this - "dir" in a command
f7554349
KH		 7278 shell on NT is very slow if we don't do this. */
7279 if (rc > 0)
7280 {
78806724 7281 int wait = w32_pipe_read_delay;
f7554349
KH		 7282
7283 if (wait > 0)
7284 Sleep (wait);
7285 else if (wait < 0)
7286 while (++wait <= 0)
7287 /* Yield remainder of our time slice, effectively giving a
7288 temporary priority boost to the child process. */
7289 Sleep (0);
7290 }
7291 }
d888760c
GM		 7292 else if (fd_info[fd].flags & FILE_SERIAL)
7293 {
7294 HANDLE hnd = fd_info[fd].hnd;
7295 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_read;
7296 COMMTIMEOUTS ct;
7297
7298 /* Configure timeouts for blocking read. */
7299 if (!GetCommTimeouts (hnd, &ct))
6e432f0c
EZ		 7300 {
7301 cp->status = STATUS_READ_ERROR;
7302 return STATUS_READ_ERROR;
7303 }
d888760c
GM		 7304 ct.ReadIntervalTimeout = 0;
7305 ct.ReadTotalTimeoutMultiplier = 0;
7306 ct.ReadTotalTimeoutConstant = 0;
7307 if (!SetCommTimeouts (hnd, &ct))
6e432f0c
EZ		 7308 {
7309 cp->status = STATUS_READ_ERROR;
7310 return STATUS_READ_ERROR;
7311 }
d888760c
GM		 7312
7313 if (!ReadFile (hnd, &cp->chr, sizeof (char), (DWORD*) &rc, ovl))
7314 {
7315 if (GetLastError () != ERROR_IO_PENDING)
6e432f0c
EZ		 7316 {
7317 cp->status = STATUS_READ_ERROR;
7318 return STATUS_READ_ERROR;
7319 }
d888760c 7320 if (!GetOverlappedResult (hnd, ovl, (DWORD*) &rc, TRUE))
6e432f0c
EZ		 7321 {
7322 cp->status = STATUS_READ_ERROR;
7323 return STATUS_READ_ERROR;
7324 }
d888760c
GM		 7325 }
7326 }
480b0c5b 7327 else if (fd_info[fd].flags & FILE_SOCKET)
ecd270eb
JR		 7328 {
7329 unsigned long nblock = 0;
7330 /* We always want this to block, so temporarily disable NDELAY. */
7331 if (fd_info[fd].flags & FILE_NDELAY)
7332 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
7333
7334 rc = pfn_recv (SOCK_HANDLE (fd), &cp->chr, sizeof (char), 0);
7335
7336 if (fd_info[fd].flags & FILE_NDELAY)
7337 {
7338 nblock = 1;
7339 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
7340 }
7341 }
177c0ea7 7342
480b0c5b
GV		 7343 if (rc == sizeof (char))
7344 cp->status = STATUS_READ_SUCCEEDED;
7345 else
7346 cp->status = STATUS_READ_FAILED;
7347
7348 return cp->status;
7349}
7350
9bfb11f9
KS		 7351int
7352_sys_wait_accept (int fd)
64570b36
KS		 7353{
7354 HANDLE hEv;
7355 child_process * cp;
7356 int rc;
7357
7358 if (fd < 0 || fd >= MAXDESC)
7359 return STATUS_READ_ERROR;
7360
7361 cp = fd_info[fd].cp;
7362
7363 if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY)
7364 return STATUS_READ_ERROR;
7365
7366 cp->status = STATUS_READ_FAILED;
7367
7368 hEv = pfn_WSACreateEvent ();
7369 rc = pfn_WSAEventSelect (SOCK_HANDLE (fd), hEv, FD_ACCEPT);
7370 if (rc != SOCKET_ERROR)
7371 {
3f940c5a
EZ		 7372 do {
7373 rc = WaitForSingleObject (hEv, 500);
7374 Sleep (5);
7375 } while (rc == WAIT_TIMEOUT
7376 && cp->status != STATUS_READ_ERROR
7377 && cp->char_avail);
64570b36 7378 pfn_WSAEventSelect (SOCK_HANDLE (fd), NULL, 0);
64570b36
KS		 7379 if (rc == WAIT_OBJECT_0)
7380 cp->status = STATUS_READ_SUCCEEDED;
7381 }
7046f191 7382 pfn_WSACloseEvent (hEv);
64570b36
KS		 7383
7384 return cp->status;
7385}
7386
480b0c5b
GV		 7387int
7388sys_read (int fd, char * buffer, unsigned int count)
7389{
7390 int nchars;
480b0c5b
GV		 7391 int to_read;
7392 DWORD waiting;
76b3903d 7393 char * orig_buffer = buffer;
480b0c5b 7394
7559f399 7395 if (fd < 0)
480b0c5b
GV		 7396 {
7397 errno = EBADF;
7398 return -1;
7399 }
7400
d888760c 7401 if (fd < MAXDESC && fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET | FILE_SERIAL))
480b0c5b
GV		 7402 {
7403 child_process *cp = fd_info[fd].cp;
7404
7405 if ((fd_info[fd].flags & FILE_READ) == 0)
7406 {
7407 errno = EBADF;
7408 return -1;
7409 }
7410
76b3903d
GV		 7411 nchars = 0;
7412
7413 /* re-read CR carried over from last read */
7414 if (fd_info[fd].flags & FILE_LAST_CR)
7415 {
1088b922 7416 if (fd_info[fd].flags & FILE_BINARY) emacs_abort ();
76b3903d
GV		 7417 *buffer++ = 0x0d;
7418 count--;
7419 nchars++;
f52eb3ef 7420 fd_info[fd].flags &= ~FILE_LAST_CR;
76b3903d
GV		 7421 }
7422
480b0c5b
GV		 7423 /* presence of a child_process structure means we are operating in
7424 non-blocking mode - otherwise we just call _read directly.
7425 Note that the child_process structure might be missing because
7426 reap_subprocess has been called; in this case the pipe is
7427 already broken, so calling _read on it is okay. */
7428 if (cp)
7429 {
7430 int current_status = cp->status;
7431
7432 switch (current_status)
7433 {
7434 case STATUS_READ_FAILED:
7435 case STATUS_READ_ERROR:
f52eb3ef
GV		 7436 /* report normal EOF if nothing in buffer */
7437 if (nchars <= 0)
7438 fd_info[fd].flags |= FILE_AT_EOF;
7439 return nchars;
480b0c5b
GV		 7440
7441 case STATUS_READ_READY:
7442 case STATUS_READ_IN_PROGRESS:
7443 DebPrint (("sys_read called when read is in progress\n"));
7444 errno = EWOULDBLOCK;
7445 return -1;
7446
7447 case STATUS_READ_SUCCEEDED:
7448 /* consume read-ahead char */
7449 *buffer++ = cp->chr;
7450 count--;
76b3903d 7451 nchars++;
480b0c5b
GV		 7452 cp->status = STATUS_READ_ACKNOWLEDGED;
7453 ResetEvent (cp->char_avail);
7454
7455 case STATUS_READ_ACKNOWLEDGED:
7456 break;
7457
7458 default:
7459 DebPrint (("sys_read: bad status %d\n", current_status));
7460 errno = EBADF;
7461 return -1;
7462 }
7463
7464 if (fd_info[fd].flags & FILE_PIPE)
7465 {
7466 PeekNamedPipe ((HANDLE) _get_osfhandle (fd), NULL, 0, NULL, &waiting, NULL);
7467 to_read = min (waiting, (DWORD) count);
f52eb3ef
GV		 7468
7469 if (to_read > 0)
7470 nchars += _read (fd, buffer, to_read);
480b0c5b 7471 }
d888760c
GM		 7472 else if (fd_info[fd].flags & FILE_SERIAL)
7473 {
7474 HANDLE hnd = fd_info[fd].hnd;
7475 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_read;
d888760c
GM		 7476 int rc = 0;
7477 COMMTIMEOUTS ct;
7478
7479 if (count > 0)
7480 {
7481 /* Configure timeouts for non-blocking read. */
7482 if (!GetCommTimeouts (hnd, &ct))
7483 {
7484 errno = EIO;
7485 return -1;
7486 }
7487 ct.ReadIntervalTimeout = MAXDWORD;
7488 ct.ReadTotalTimeoutMultiplier = 0;
7489 ct.ReadTotalTimeoutConstant = 0;
7490 if (!SetCommTimeouts (hnd, &ct))
7491 {
7492 errno = EIO;
7493 return -1;
7494 }
7495
7496 if (!ResetEvent (ovl->hEvent))
7497 {
7498 errno = EIO;
7499 return -1;
7500 }
7501 if (!ReadFile (hnd, buffer, count, (DWORD*) &rc, ovl))
7502 {
7503 if (GetLastError () != ERROR_IO_PENDING)
7504 {
7505 errno = EIO;
7506 return -1;
7507 }
7508 if (!GetOverlappedResult (hnd, ovl, (DWORD*) &rc, TRUE))
7509 {
7510 errno = EIO;
7511 return -1;
7512 }
7513 }
7514 nchars += rc;
7515 }
7516 }
480b0c5b
GV		 7517 else /* FILE_SOCKET */
7518 {
1088b922 7519 if (winsock_lib == NULL) emacs_abort ();
480b0c5b
GV		 7520
7521 /* do the equivalent of a non-blocking read */
7522 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONREAD, &waiting);
76b3903d 7523 if (waiting == 0 && nchars == 0)
480b0c5b 7524 {
f277993b 7525 errno = EWOULDBLOCK;
480b0c5b
GV		 7526 return -1;
7527 }
7528
480b0c5b
GV		 7529 if (waiting)
7530 {
7531 /* always use binary mode for sockets */
76b3903d
GV		 7532 int res = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0);
7533 if (res == SOCKET_ERROR)
480b0c5b 7534 {
ed3751c8
JB		 7535 DebPrint (("sys_read.recv failed with error %d on socket %ld\n",
7536 pfn_WSAGetLastError (), SOCK_HANDLE (fd)));
76b3903d
GV		 7537 set_errno ();
7538 return -1;
480b0c5b 7539 }
76b3903d 7540 nchars += res;
480b0c5b
GV		 7541 }
7542 }
480b0c5b
GV		 7543 }
7544 else
f52eb3ef
GV		 7545 {
7546 int nread = _read (fd, buffer, count);
7547 if (nread >= 0)
7548 nchars += nread;
7549 else if (nchars == 0)
7550 nchars = nread;
7551 }
76b3903d 7552
f52eb3ef
GV		 7553 if (nchars <= 0)
7554 fd_info[fd].flags |= FILE_AT_EOF;
76b3903d 7555 /* Perform text mode translation if required. */
f52eb3ef 7556 else if ((fd_info[fd].flags & FILE_BINARY) == 0)
76b3903d
GV		 7557 {
7558 nchars = crlf_to_lf (nchars, orig_buffer);
7559 /* If buffer contains only CR, return that. To be absolutely
7560 sure we should attempt to read the next char, but in
7561 practice a CR to be followed by LF would not appear by
7562 itself in the buffer. */
7563 if (nchars > 1 && orig_buffer[nchars - 1] == 0x0d)
7564 {
7565 fd_info[fd].flags |= FILE_LAST_CR;
7566 nchars--;
7567 }
76b3903d 7568 }
480b0c5b
GV		 7569 }
7570 else
7571 nchars = _read (fd, buffer, count);
7572
76b3903d 7573 return nchars;
480b0c5b
GV		 7574}
7575
d888760c
GM		 7576/* From w32xfns.c */
7577extern HANDLE interrupt_handle;
7578
480b0c5b
GV		 7579/* For now, don't bother with a non-blocking mode */
7580int
7581sys_write (int fd, const void * buffer, unsigned int count)
7582{
7583 int nchars;
7584
7559f399 7585 if (fd < 0)
480b0c5b
GV		 7586 {
7587 errno = EBADF;
7588 return -1;
7589 }
7590
d888760c 7591 if (fd < MAXDESC && fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET | FILE_SERIAL))
76b3903d
GV		 7592 {
7593 if ((fd_info[fd].flags & FILE_WRITE) == 0)
7594 {
7595 errno = EBADF;
7596 return -1;
7597 }
7598
7599 /* Perform text mode translation if required. */
7600 if ((fd_info[fd].flags & FILE_BINARY) == 0)
7601 {
7602 char * tmpbuf = alloca (count * 2);
7603 unsigned char * src = (void *)buffer;
7604 unsigned char * dst = tmpbuf;
7605 int nbytes = count;
7606
7607 while (1)
7608 {
7609 unsigned char *next;
7610 /* copy next line or remaining bytes */
7611 next = _memccpy (dst, src, '\n', nbytes);
7612 if (next)
7613 {
7614 /* copied one line ending with '\n' */
7615 int copied = next - dst;
7616 nbytes -= copied;
7617 src += copied;
7618 /* insert '\r' before '\n' */
7619 next[-1] = '\r';
7620 next[0] = '\n';
7621 dst = next + 1;
7622 count++;
177c0ea7 7623 }
76b3903d
GV		 7624 else
7625 /* copied remaining partial line -> now finished */
7626 break;
7627 }
7628 buffer = tmpbuf;
7629 }
7630 }
7631
d888760c
GM		 7632 if (fd < MAXDESC && fd_info[fd].flags & FILE_SERIAL)
7633 {
7634 HANDLE hnd = (HANDLE) _get_osfhandle (fd);
7635 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_write;
7636 HANDLE wait_hnd[2] = { interrupt_handle, ovl->hEvent };
7637 DWORD active = 0;
7638
7639 if (!WriteFile (hnd, buffer, count, (DWORD*) &nchars, ovl))
7640 {
7641 if (GetLastError () != ERROR_IO_PENDING)
7642 {
7643 errno = EIO;
7644 return -1;
7645 }
7646 if (detect_input_pending ())
7647 active = MsgWaitForMultipleObjects (2, wait_hnd, FALSE, INFINITE,
7648 QS_ALLINPUT);
7649 else
7650 active = WaitForMultipleObjects (2, wait_hnd, FALSE, INFINITE);
7651 if (active == WAIT_OBJECT_0)
7652 { /* User pressed C-g, cancel write, then leave. Don't bother
7653 cleaning up as we may only get stuck in buggy drivers. */
7654 PurgeComm (hnd, PURGE_TXABORT | PURGE_TXCLEAR);
7655 CancelIo (hnd);
7656 errno = EIO;
7657 return -1;
7658 }
7659 if (active == WAIT_OBJECT_0 + 1
7660 && !GetOverlappedResult (hnd, ovl, (DWORD*) &nchars, TRUE))
7661 {
7662 errno = EIO;
7663 return -1;
7664 }
7665 }
7666 }
7d701334 7667 else if (fd < MAXDESC && fd_info[fd].flags & FILE_SOCKET)
480b0c5b 7668 {
30a32e0e 7669 unsigned long nblock = 0;
1088b922 7670 if (winsock_lib == NULL) emacs_abort ();
30a32e0e
JR		 7671
7672 /* TODO: implement select() properly so non-blocking I/O works. */
7673 /* For now, make sure the write blocks. */
7674 if (fd_info[fd].flags & FILE_NDELAY)
7675 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
7676
480b0c5b 7677 nchars = pfn_send (SOCK_HANDLE (fd), buffer, count, 0);
30a32e0e
JR		 7678
7679 /* Set the socket back to non-blocking if it was before,
7680 for other operations that support it. */
7681 if (fd_info[fd].flags & FILE_NDELAY)
7682 {
7683 nblock = 1;
7684 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
7685 }
7686
480b0c5b
GV		 7687 if (nchars == SOCKET_ERROR)
7688 {
ed3751c8
JB		 7689 DebPrint (("sys_write.send failed with error %d on socket %ld\n",
7690 pfn_WSAGetLastError (), SOCK_HANDLE (fd)));
480b0c5b
GV		 7691 set_errno ();
7692 }
7693 }
7694 else
6e83d800
EZ		 7695 {
7696 /* Some networked filesystems don't like too large writes, so
7697 break them into smaller chunks. See the Comments section of
7698 the MSDN documentation of WriteFile for details behind the
7699 choice of the value of CHUNK below. See also the thread
7700 http://thread.gmane.org/gmane.comp.version-control.git/145294
7701 in the git mailing list. */
7702 const unsigned char *p = buffer;
7703 const unsigned chunk = 30 * 1024 * 1024;
7704
7705 nchars = 0;
7706 while (count > 0)
7707 {
7708 unsigned this_chunk = count < chunk ? count : chunk;
7709 int n = _write (fd, p, this_chunk);
7710
7711 nchars += n;
7712 if (n < 0)
7713 {
7714 nchars = n;
7715 break;
7716 }
7717 else if (n < this_chunk)
7718 break;
7719 count -= n;
7720 p += n;
7721 }
7722 }
480b0c5b
GV		 7723
7724 return nchars;
7725}
7726
3dffe395
EZ		 7727\f
7728/* Emulation of SIOCGIFCONF and getifaddrs, see process.c. */
7729
7730extern Lisp_Object conv_sockaddr_to_lisp (struct sockaddr *, int);
7731
7732/* Return information about network interface IFNAME, or about all
7733 interfaces (if IFNAME is nil). */
7734static Lisp_Object
7735network_interface_get_info (Lisp_Object ifname)
7736{
7737 ULONG ainfo_len = sizeof (IP_ADAPTER_INFO);
7738 IP_ADAPTER_INFO *adapter, *ainfo = xmalloc (ainfo_len);
7739 DWORD retval = get_adapters_info (ainfo, &ainfo_len);
7740 Lisp_Object res = Qnil;
7741
7742 if (retval == ERROR_BUFFER_OVERFLOW)
7743 {
7744 ainfo = xrealloc (ainfo, ainfo_len);
7745 retval = get_adapters_info (ainfo, &ainfo_len);
7746 }
7747
7748 if (retval == ERROR_SUCCESS)
7749 {
7750 int eth_count = 0, tr_count = 0, fddi_count = 0, ppp_count = 0;
7751 int sl_count = 0, wlan_count = 0, lo_count = 0, ifx_count = 0;
7752 int if_num;
7753 struct sockaddr_in sa;
7754
7755 /* For the below, we need some winsock functions, so make sure
7756 the winsock DLL is loaded. If we cannot successfully load
7757 it, they will have no use of the information we provide,
7758 anyway, so punt. */
7759 if (!winsock_lib && !init_winsock (1))
7760 goto done;
7761
7762 for (adapter = ainfo; adapter; adapter = adapter->Next)
7763 {
7764 char namebuf[MAX_ADAPTER_NAME_LENGTH + 4];
7765 u_long ip_addr;
7766 /* Present Unix-compatible interface names, instead of the
7767 Windows names, which are really GUIDs not readable by
7768 humans. */
7769 static const char *ifmt[] = {
7770 "eth%d", "tr%d", "fddi%d", "ppp%d", "sl%d", "wlan%d",
7771 "lo", "ifx%d"
7772 };
7773 enum {
7774 NONE = -1,
7775 ETHERNET = 0,
7776 TOKENRING = 1,
7777 FDDI = 2,
7778 PPP = 3,
7779 SLIP = 4,
7780 WLAN = 5,
7781 LOOPBACK = 6,
7782 OTHER_IF = 7
7783 } ifmt_idx;
7784
7785 switch (adapter->Type)
7786 {
7787 case MIB_IF_TYPE_ETHERNET:
7788 /* Windows before Vista reports wireless adapters as
7789 Ethernet. Work around by looking at the Description
7790 string. */
7791 if (strstr (adapter->Description, "Wireless "))
7792 {
7793 ifmt_idx = WLAN;
7794 if_num = wlan_count++;
7795 }
7796 else
7797 {
7798 ifmt_idx = ETHERNET;
7799 if_num = eth_count++;
7800 }
7801 break;
7802 case MIB_IF_TYPE_TOKENRING:
7803 ifmt_idx = TOKENRING;
7804 if_num = tr_count++;
7805 break;
7806 case MIB_IF_TYPE_FDDI:
7807 ifmt_idx = FDDI;
7808 if_num = fddi_count++;
7809 break;
7810 case MIB_IF_TYPE_PPP:
7811 ifmt_idx = PPP;
7812 if_num = ppp_count++;
7813 break;
7814 case MIB_IF_TYPE_SLIP:
7815 ifmt_idx = SLIP;
7816 if_num = sl_count++;
7817 break;
7818 case IF_TYPE_IEEE80211:
7819 ifmt_idx = WLAN;
7820 if_num = wlan_count++;
7821 break;
7822 case MIB_IF_TYPE_LOOPBACK:
7823 if (lo_count < 0)
7824 {
7825 ifmt_idx = LOOPBACK;
7826 if_num = lo_count++;
7827 }
7828 else
7829 ifmt_idx = NONE;
7830 break;
7831 default:
7832 ifmt_idx = OTHER_IF;
7833 if_num = ifx_count++;
7834 break;
7835 }
7836 if (ifmt_idx == NONE)
7837 continue;
7838 sprintf (namebuf, ifmt[ifmt_idx], if_num);
7839
7840 sa.sin_family = AF_INET;
7841 ip_addr = sys_inet_addr (adapter->IpAddressList.IpAddress.String);
7842 if (ip_addr == INADDR_NONE)
7843 {
7844 /* Bogus address, skip this interface. */
7845 continue;
7846 }
7847 sa.sin_addr.s_addr = ip_addr;
7848 sa.sin_port = 0;
7849 if (NILP (ifname))
7850 res = Fcons (Fcons (build_string (namebuf),
7851 conv_sockaddr_to_lisp ((struct sockaddr*) &sa,
7852 sizeof (struct sockaddr))),
7853 res);
7854 else if (strcmp (namebuf, SSDATA (ifname)) == 0)
7855 {
7856 Lisp_Object hwaddr = Fmake_vector (make_number (6), Qnil);
7857 register struct Lisp_Vector *p = XVECTOR (hwaddr);
7858 Lisp_Object flags = Qnil;
7859 int n;
7860 u_long net_mask;
7861
7862 /* Flags. We guess most of them by type, since the
7863 Windows flags are different and hard to get by. */
7864 flags = Fcons (intern ("up"), flags);
7865 if (ifmt_idx == ETHERNET || ifmt_idx == WLAN)
7866 {
7867 flags = Fcons (intern ("broadcast"), flags);
7868 flags = Fcons (intern ("multicast"), flags);
7869 }
7870 flags = Fcons (intern ("running"), flags);
7871 if (ifmt_idx == PPP)
7872 {
7873 flags = Fcons (intern ("pointopoint"), flags);
7874 flags = Fcons (intern ("noarp"), flags);
7875 }
7876 if (adapter->HaveWins)
7877 flags = Fcons (intern ("WINS"), flags);
7878 if (adapter->DhcpEnabled)
7879 flags = Fcons (intern ("dynamic"), flags);
7880
7881 res = Fcons (flags, res);
7882
7883 /* Hardware address and its family. */
7884 for (n = 0; n < adapter->AddressLength; n++)
7885 p->u.contents[n] = make_number ((int) adapter->Address[n]);
7886 /* Windows does not support AF_LINK or AF_PACKET family
7887 of addresses. Use an arbitrary family number that is
7888 identical to what GNU/Linux returns. */
7889 res = Fcons (Fcons (make_number (1), hwaddr), res);
7890
7891 /* Network mask. */
7892 sa.sin_family = AF_INET;
7893 net_mask = sys_inet_addr (adapter->IpAddressList.IpMask.String);
7894 if (net_mask != INADDR_NONE)
7895 {
7896 sa.sin_addr.s_addr = net_mask;
7897 sa.sin_port = 0;
7898 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
7899 sizeof (struct sockaddr)),
7900 res);
7901 }
7902 else
7903 res = Fcons (Qnil, res);
7904
7905 sa.sin_family = AF_INET;
7906 if (ip_addr != INADDR_NONE)
7907 {
7908 /* Broadcast address is only reported by
7909 GetAdaptersAddresses, which is of limited
7910 availability. Generate it on our own. */
7911 u_long bcast_addr = (ip_addr & net_mask) | ~net_mask;
7912
7913 sa.sin_addr.s_addr = bcast_addr;
7914 sa.sin_port = 0;
7915 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
7916 sizeof (struct sockaddr)),
7917 res);
7918
7919 /* IP address. */
7920 sa.sin_addr.s_addr = ip_addr;
7921 sa.sin_port = 0;
7922 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
7923 sizeof (struct sockaddr)),
7924 res);
7925 }
7926 else
7927 res = Fcons (Qnil, Fcons (Qnil, res));
7928 }
7929 }
7930 /* GetAdaptersInfo is documented to not report loopback
7931 interfaces, so we generate one out of thin air. */
7932 if (!lo_count)
7933 {
7934 sa.sin_family = AF_INET;
7935 sa.sin_port = 0;
7936 if (NILP (ifname))
7937 {
7938 sa.sin_addr.s_addr = sys_inet_addr ("127.0.0.1");
7939 res = Fcons (Fcons (build_string ("lo"),
7940 conv_sockaddr_to_lisp ((struct sockaddr*) &sa,
7941 sizeof (struct sockaddr))),
7942 res);
7943 }
7944 else if (strcmp (SSDATA (ifname), "lo") == 0)
7945 {
7946 res = Fcons (Fcons (intern ("running"),
7947 Fcons (intern ("loopback"),
7948 Fcons (intern ("up"), Qnil))), Qnil);
7949 /* 772 is what 3 different GNU/Linux systems report for
7950 the loopback interface. */
7951 res = Fcons (Fcons (make_number (772),
7952 Fmake_vector (make_number (6),
7953 make_number (0))),
7954 res);
7955 sa.sin_addr.s_addr = sys_inet_addr ("255.0.0.0");
7956 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
7957 sizeof (struct sockaddr)),
7958 res);
7959 sa.sin_addr.s_addr = sys_inet_addr ("0.0.0.0");
7960 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
7961 sizeof (struct sockaddr)),
7962 res);
7963 sa.sin_addr.s_addr = sys_inet_addr ("127.0.0.1");
7964 res = Fcons (conv_sockaddr_to_lisp ((struct sockaddr *) &sa,
7965 sizeof (struct sockaddr)),
7966 res);
7967 }
7968
7969 }
7970 }
7971
7972 done:
7973 xfree (ainfo);
7974 return res;
7975}
7976
7977Lisp_Object
7978network_interface_list (void)
7979{
7980 return network_interface_get_info (Qnil);
7981}
7982
7983Lisp_Object
7984network_interface_info (Lisp_Object ifname)
7985{
7986 return network_interface_get_info (ifname);
7987}
7988
7989\f
97a93095
EZ		 7990/* The Windows CRT functions are "optimized for speed", so they don't
7991 check for timezone and DST changes if they were last called less
7992 than 1 minute ago (see http://support.microsoft.com/kb/821231). So
7993 all Emacs features that repeatedly call time functions (e.g.,
7994 display-time) are in real danger of missing timezone and DST
7995 changes. Calling tzset before each localtime call fixes that. */
7996struct tm *
7997sys_localtime (const time_t *t)
7998{
7999 tzset ();
8000 return localtime (t);
8001}
8002
0898ca10
JB		 8003
8004\f
d07ff9db
CY		 8005/* Try loading LIBRARY_ID from the file(s) specified in
8006 Vdynamic_library_alist. If the library is loaded successfully,
8007 return the handle of the DLL, and record the filename in the
8008 property :loaded-from of LIBRARY_ID. If the library could not be
8009 found, or when it was already loaded (because the handle is not
8010 recorded anywhere, and so is lost after use), return NULL.
8011
8012 We could also save the handle in :loaded-from, but currently
8013 there's no use case for it. */
0898ca10 8014HMODULE
d07ff9db 8015w32_delayed_load (Lisp_Object library_id)
0898ca10
JB		 8016{
8017 HMODULE library_dll = NULL;
8018
8019 CHECK_SYMBOL (library_id);
8020
d07ff9db
CY		 8021 if (CONSP (Vdynamic_library_alist)
8022 && NILP (Fassq (library_id, Vlibrary_cache)))
0898ca10
JB		 8023 {
8024 Lisp_Object found = Qnil;
d07ff9db 8025 Lisp_Object dlls = Fassq (library_id, Vdynamic_library_alist);
0898ca10
JB		 8026
8027 if (CONSP (dlls))
8028 for (dlls = XCDR (dlls); CONSP (dlls); dlls = XCDR (dlls))
8029 {
8030 CHECK_STRING_CAR (dlls);
657d08d3 8031 if ((library_dll = LoadLibrary (SDATA (XCAR (dlls)))))
0898ca10 8032 {
2a8ce227
JB		 8033 char name[MAX_PATH];
8034 DWORD len;
8035
8036 len = GetModuleFileNameA (library_dll, name, sizeof (name));
8037 found = Fcons (XCAR (dlls),
8038 (len > 0)
8039 /* Possibly truncated */
8040 ? make_specified_string (name, -1, len, 1)
8041 : Qnil);
0898ca10
JB		 8042 break;
8043 }
8044 }
8045
8046 Fput (library_id, QCloaded_from, found);
8047 }
8048
8049 return library_dll;
8050}
8051
8052\f
76151e2c 8053void
b56ceb92 8054check_windows_init_file (void)
f52eb3ef 8055{
f52eb3ef
GV		 8056 /* A common indication that Emacs is not installed properly is when
8057 it cannot find the Windows installation file. If this file does
8058 not exist in the expected place, tell the user. */
8059
c7aa8333
EZ		 8060 if (!noninteractive && !inhibit_window_system
8061 /* Vload_path is not yet initialized when we are loading
8062 loadup.el. */
8063 && NILP (Vpurify_flag))
d54abccd 8064 {
d54abccd
GV		 8065 Lisp_Object init_file;
8066 int fd;
f52eb3ef 8067
d54abccd 8068 init_file = build_string ("term/w32-win");
76151e2c 8069 fd = openp (Vload_path, init_file, Fget_load_suffixes (), NULL, Qnil);
177c0ea7 8070 if (fd < 0)
d54abccd 8071 {
76151e2c 8072 Lisp_Object load_path_print = Fprin1_to_string (Vload_path, Qnil);
d5db4077
KR		 8073 char *init_file_name = SDATA (init_file);
8074 char *load_path = SDATA (load_path_print);
acc23b87
KS		 8075 char *buffer = alloca (1024
8076 + strlen (init_file_name)
8077 + strlen (load_path));
d54abccd 8078
177c0ea7 8079 sprintf (buffer,
d54abccd
GV		 8080 "The Emacs Windows initialization file \"%s.el\" "
8081 "could not be found in your Emacs installation. "
8082 "Emacs checked the following directories for this file:\n"
8083 "\n%s\n\n"
8084 "When Emacs cannot find this file, it usually means that it "
8085 "was not installed properly, or its distribution file was "
8086 "not unpacked properly.\nSee the README.W32 file in the "
8087 "top-level Emacs directory for more information.",
8088 init_file_name, load_path);
8089 MessageBox (NULL,
8090 buffer,
8091 "Emacs Abort Dialog",
8092 MB_OK | MB_ICONEXCLAMATION | MB_TASKMODAL);
1088b922 8093 /* Use the low-level system abort. */
d54abccd
GV		 8094 abort ();
8095 }
8096 else
8097 {
a302c7ae 8098 _close (fd);
d54abccd 8099 }
f52eb3ef 8100 }
f52eb3ef 8101}
480b0c5b
GV		 8102
8103void
16b22fef 8104term_ntproc (int ignored)
480b0c5b 8105{
16b22fef 8106 (void)ignored;
c06c382a
EZ		 8107
8108 term_timers ();
8109
480b0c5b
GV		 8110 /* shutdown the socket interface if necessary */
8111 term_winsock ();
52c7f9ee
JR		 8112
8113 term_w32select ();
480b0c5b
GV		 8114}
8115
8116void
16b22fef 8117init_ntproc (int dumping)
480b0c5b 8118{
c06c382a
EZ		 8119 sigset_t initial_mask = 0;
8120
e1dbe924 8121 /* Initialize the socket interface now if available and requested by
f249a012 8122 the user by defining PRELOAD_WINSOCK; otherwise loading will be
fbd6baed 8123 delayed until open-network-stream is called (w32-has-winsock can
f249a012
RS		 8124 also be used to dynamically load or reload winsock).
8125
8126 Conveniently, init_environment is called before us, so
8127 PRELOAD_WINSOCK can be set in the registry. */
8128
8129 /* Always initialize this correctly. */
8130 winsock_lib = NULL;
8131
8132 if (getenv ("PRELOAD_WINSOCK") != NULL)
8133 init_winsock (TRUE);
480b0c5b
GV		 8134
8135 /* Initial preparation for subprocess support: replace our standard
8136 handles with non-inheritable versions. */
8137 {
8138 HANDLE parent;
8139 HANDLE stdin_save = INVALID_HANDLE_VALUE;
8140 HANDLE stdout_save = INVALID_HANDLE_VALUE;
8141 HANDLE stderr_save = INVALID_HANDLE_VALUE;
8142
8143 parent = GetCurrentProcess ();
8144
8145 /* ignore errors when duplicating and closing; typically the
8146 handles will be invalid when running as a gui program. */
177c0ea7
JB		 8147 DuplicateHandle (parent,
8148 GetStdHandle (STD_INPUT_HANDLE),
480b0c5b 8149 parent,
177c0ea7
JB		 8150 &stdin_save,
8151 0,
8152 FALSE,
480b0c5b 8153 DUPLICATE_SAME_ACCESS);
177c0ea7 8154
480b0c5b
GV		 8155 DuplicateHandle (parent,
8156 GetStdHandle (STD_OUTPUT_HANDLE),
8157 parent,
8158 &stdout_save,
8159 0,
8160 FALSE,
8161 DUPLICATE_SAME_ACCESS);
177c0ea7 8162
480b0c5b
GV		 8163 DuplicateHandle (parent,
8164 GetStdHandle (STD_ERROR_HANDLE),
8165 parent,
8166 &stderr_save,
8167 0,
8168 FALSE,
8169 DUPLICATE_SAME_ACCESS);
177c0ea7 8170
480b0c5b
GV		 8171 fclose (stdin);
8172 fclose (stdout);
8173 fclose (stderr);
8174
8175 if (stdin_save != INVALID_HANDLE_VALUE)
62aba0d4 8176 _open_osfhandle ((intptr_t) stdin_save, O_TEXT);
480b0c5b 8177 else
76b3903d
GV		 8178 _open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY);
8179 _fdopen (0, "r");
480b0c5b
GV		 8180
8181 if (stdout_save != INVALID_HANDLE_VALUE)
62aba0d4 8182 _open_osfhandle ((intptr_t) stdout_save, O_TEXT);
480b0c5b 8183 else
76b3903d
GV		 8184 _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY);
8185 _fdopen (1, "w");
480b0c5b
GV		 8186
8187 if (stderr_save != INVALID_HANDLE_VALUE)
62aba0d4 8188 _open_osfhandle ((intptr_t) stderr_save, O_TEXT);
480b0c5b 8189 else
76b3903d
GV		 8190 _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY);
8191 _fdopen (2, "w");
480b0c5b
GV		 8192 }
8193
8194 /* unfortunately, atexit depends on implementation of malloc */
8195 /* atexit (term_ntproc); */
16b22fef 8196 if (!dumping)
c06c382a
EZ		 8197 {
8198 /* Make sure we start with all signals unblocked. */
8199 sigprocmask (SIG_SETMASK, &initial_mask, NULL);
8200 signal (SIGABRT, term_ntproc);
8201 }
8202 init_timers ();
76b3903d
GV		 8203
8204 /* determine which drives are fixed, for GetCachedVolumeInformation */
8205 {
8206 /* GetDriveType must have trailing backslash. */
8207 char drive[] = "A:\\";
8208
8209 /* Loop over all possible drive letters */
8210 while (*drive <= 'Z')
8211 {
8212 /* Record if this drive letter refers to a fixed drive. */
177c0ea7 8213 fixed_drives[DRIVE_INDEX (*drive)] =
76b3903d
GV		 8214 (GetDriveType (drive) == DRIVE_FIXED);
8215
8216 (*drive)++;
8217 }
a302c7ae
AI		 8218
8219 /* Reset the volume info cache. */
8220 volume_cache = NULL;
76b3903d 8221 }
480b0c5b
GV		 8222}
8223
a8c3a596
JR		 8224/*
8225 shutdown_handler ensures that buffers' autosave files are
8226 up to date when the user logs off, or the system shuts down.
8227*/
bedf4aab 8228static BOOL WINAPI
ed3751c8 8229shutdown_handler (DWORD type)
a8c3a596
JR		 8230{
8231 /* Ctrl-C and Ctrl-Break are already suppressed, so don't handle them. */
8232 if (type == CTRL_CLOSE_EVENT /* User closes console window. */
8233 || type == CTRL_LOGOFF_EVENT /* User logs off. */
8234 || type == CTRL_SHUTDOWN_EVENT) /* User shutsdown. */
8235 {
8236 /* Shut down cleanly, making sure autosave files are up to date. */
1882aa38 8237 shut_down_emacs (0, Qnil);
a8c3a596
JR		 8238 }
8239
7046f191 8240 /* Allow other handlers to handle this signal. */
a8c3a596
JR		 8241 return FALSE;
8242}
8243
9785d95b
BK		 8244/*
8245 globals_of_w32 is used to initialize those global variables that
8246 must always be initialized on startup even when the global variable
8247 initialized is non zero (see the function main in emacs.c).
8248*/
9bfb11f9 8249void
b56ceb92 8250globals_of_w32 (void)
9785d95b 8251{
74258518
JR		 8252 HMODULE kernel32 = GetModuleHandle ("kernel32.dll");
8253
8254 get_process_times_fn = (GetProcessTimes_Proc)
8255 GetProcAddress (kernel32, "GetProcessTimes");
8256
cd3520a4 8257 DEFSYM (QCloaded_from, ":loaded-from");
0898ca10 8258
9785d95b
BK		 8259 g_b_init_is_windows_9x = 0;
8260 g_b_init_open_process_token = 0;
8261 g_b_init_get_token_information = 0;
8262 g_b_init_lookup_account_sid = 0;
9d95a291
EZ		 8263 g_b_init_get_sid_sub_authority = 0;
8264 g_b_init_get_sid_sub_authority_count = 0;
6dad7178 8265 g_b_init_get_security_info = 0;
8aaaec6b
EZ		 8266 g_b_init_get_file_security = 0;
8267 g_b_init_get_security_descriptor_owner = 0;
8268 g_b_init_get_security_descriptor_group = 0;
8269 g_b_init_is_valid_sid = 0;
7c80d5ec
EZ		 8270 g_b_init_create_toolhelp32_snapshot = 0;
8271 g_b_init_process32_first = 0;
8272 g_b_init_process32_next = 0;
8273 g_b_init_open_thread_token = 0;
8274 g_b_init_impersonate_self = 0;
8275 g_b_init_revert_to_self = 0;
8276 g_b_init_get_process_memory_info = 0;
8277 g_b_init_get_process_working_set_size = 0;
8278 g_b_init_global_memory_status = 0;
8279 g_b_init_global_memory_status_ex = 0;
f8b35b24
EZ		 8280 g_b_init_equal_sid = 0;
8281 g_b_init_copy_sid = 0;
8282 g_b_init_get_length_sid = 0;
ad9e2d54
EZ		 8283 g_b_init_get_native_system_info = 0;
8284 g_b_init_get_system_times = 0;
6dad7178 8285 g_b_init_create_symbolic_link = 0;
66447e07
EZ		 8286 g_b_init_get_security_descriptor_dacl = 0;
8287 g_b_init_convert_sd_to_sddl = 0;
8288 g_b_init_convert_sddl_to_sd = 0;
8289 g_b_init_is_valid_security_descriptor = 0;
8290 g_b_init_set_file_security = 0;
3dffe395 8291 g_b_init_get_adapters_info = 0;
ad9e2d54 8292 num_of_processors = 0;
a8c3a596
JR		 8293 /* The following sets a handler for shutdown notifications for
8294 console apps. This actually applies to Emacs in both console and
8295 GUI modes, since we had to fool windows into thinking emacs is a
8296 console application to get console mode to work. */
ed3751c8 8297 SetConsoleCtrlHandler (shutdown_handler, TRUE);
8aaaec6b
EZ		 8298
8299 /* "None" is the default group name on standalone workstations. */
8300 strcpy (dflt_group_name, "None");
5c207910
EZ		 8301
8302 /* Reset, in case it has some value inherited from dump time. */
8303 w32_stat_get_owner_group = 0;
03d58cca
EZ		 8304
8305 /* If w32_unicode_filenames is non-zero, we will be using Unicode
8306 (a.k.a. "wide") APIs to invoke functions that accept file
8307 names. */
8308 if (is_windows_9x ())
8309 w32_unicode_filenames = 0;
8310 else
8311 w32_unicode_filenames = 1;
9785d95b
BK		 8312}
8313
d888760c 8314/* For make-serial-process */
b56ceb92 8315int
4e604a5d 8316serial_open (Lisp_Object port_obj)
d888760c 8317{
4e604a5d 8318 char *port = SSDATA (port_obj);
d888760c
GM		 8319 HANDLE hnd;
8320 child_process *cp;
8321 int fd = -1;
8322
8323 hnd = CreateFile (port, GENERIC_READ | GENERIC_WRITE, 0, 0,
8324 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
8325 if (hnd == INVALID_HANDLE_VALUE)
8326 error ("Could not open %s", port);
62aba0d4 8327 fd = (int) _open_osfhandle ((intptr_t) hnd, 0);
d888760c
GM		 8328 if (fd == -1)
8329 error ("Could not open %s", port);
8330
8331 cp = new_child ();
8332 if (!cp)
8333 error ("Could not create child process");
8334 cp->fd = fd;
8335 cp->status = STATUS_READ_ACKNOWLEDGED;
8336 fd_info[ fd ].hnd = hnd;
8337 fd_info[ fd ].flags |=
8338 FILE_READ | FILE_WRITE | FILE_BINARY | FILE_SERIAL;
8339 if (fd_info[ fd ].cp != NULL)
8340 {
8341 error ("fd_info[fd = %d] is already in use", fd);
8342 }
8343 fd_info[ fd ].cp = cp;
8344 cp->ovl_read.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL);
8345 if (cp->ovl_read.hEvent == NULL)
8346 error ("Could not create read event");
8347 cp->ovl_write.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL);
8348 if (cp->ovl_write.hEvent == NULL)
8349 error ("Could not create write event");
8350
8351 return fd;
8352}
8353
8354/* For serial-process-configure */
8355void
9d4f32e8 8356serial_configure (struct Lisp_Process *p, Lisp_Object contact)
d888760c
GM		 8357{
8358 Lisp_Object childp2 = Qnil;
8359 Lisp_Object tem = Qnil;
8360 HANDLE hnd;
8361 DCB dcb;
8362 COMMTIMEOUTS ct;
8363 char summary[4] = "???"; /* This usually becomes "8N1". */
8364
8365 if ((fd_info[ p->outfd ].flags & FILE_SERIAL) == 0)
8366 error ("Not a serial process");
8367 hnd = fd_info[ p->outfd ].hnd;
8368
4d2b044c 8369 childp2 = Fcopy_sequence (p->childp);
d888760c
GM		 8370
8371 /* Initialize timeouts for blocking read and blocking write. */
8372 if (!GetCommTimeouts (hnd, &ct))
8373 error ("GetCommTimeouts() failed");
8374 ct.ReadIntervalTimeout = 0;
8375 ct.ReadTotalTimeoutMultiplier = 0;
8376 ct.ReadTotalTimeoutConstant = 0;
8377 ct.WriteTotalTimeoutMultiplier = 0;
8378 ct.WriteTotalTimeoutConstant = 0;
8379 if (!SetCommTimeouts (hnd, &ct))
8380 error ("SetCommTimeouts() failed");
8381 /* Read port attributes and prepare default configuration. */
8382 memset (&dcb, 0, sizeof (dcb));
8383 dcb.DCBlength = sizeof (DCB);
8384 if (!GetCommState (hnd, &dcb))
8385 error ("GetCommState() failed");
8386 dcb.fBinary = TRUE;
8387 dcb.fNull = FALSE;
8388 dcb.fAbortOnError = FALSE;
8389 /* dcb.XonLim and dcb.XoffLim are set by GetCommState() */
8390 dcb.ErrorChar = 0;
8391 dcb.EofChar = 0;
8392 dcb.EvtChar = 0;
8393
8394 /* Configure speed. */
8395 if (!NILP (Fplist_member (contact, QCspeed)))
8396 tem = Fplist_get (contact, QCspeed);
8397 else
4d2b044c 8398 tem = Fplist_get (p->childp, QCspeed);
d888760c
GM		 8399 CHECK_NUMBER (tem);
8400 dcb.BaudRate = XINT (tem);
8401 childp2 = Fplist_put (childp2, QCspeed, tem);
8402
8403 /* Configure bytesize. */
8404 if (!NILP (Fplist_member (contact, QCbytesize)))
8405 tem = Fplist_get (contact, QCbytesize);
8406 else
4d2b044c 8407 tem = Fplist_get (p->childp, QCbytesize);
d888760c
GM		 8408 if (NILP (tem))
8409 tem = make_number (8);
8410 CHECK_NUMBER (tem);
8411 if (XINT (tem) != 7 && XINT (tem) != 8)
8412 error (":bytesize must be nil (8), 7, or 8");
8413 dcb.ByteSize = XINT (tem);
8414 summary[0] = XINT (tem) + '0';
8415 childp2 = Fplist_put (childp2, QCbytesize, tem);
8416
8417 /* Configure parity. */
8418 if (!NILP (Fplist_member (contact, QCparity)))
8419 tem = Fplist_get (contact, QCparity);
8420 else
4d2b044c 8421 tem = Fplist_get (p->childp, QCparity);
d888760c
GM		 8422 if (!NILP (tem) && !EQ (tem, Qeven) && !EQ (tem, Qodd))
8423 error (":parity must be nil (no parity), `even', or `odd'");
8424 dcb.fParity = FALSE;
8425 dcb.Parity = NOPARITY;
8426 dcb.fErrorChar = FALSE;
8427 if (NILP (tem))
8428 {
8429 summary[1] = 'N';
8430 }
8431 else if (EQ (tem, Qeven))
8432 {
8433 summary[1] = 'E';
8434 dcb.fParity = TRUE;
8435 dcb.Parity = EVENPARITY;
8436 dcb.fErrorChar = TRUE;
8437 }
8438 else if (EQ (tem, Qodd))
8439 {
8440 summary[1] = 'O';
8441 dcb.fParity = TRUE;
8442 dcb.Parity = ODDPARITY;
8443 dcb.fErrorChar = TRUE;
8444 }
8445 childp2 = Fplist_put (childp2, QCparity, tem);
8446
8447 /* Configure stopbits. */
8448 if (!NILP (Fplist_member (contact, QCstopbits)))
8449 tem = Fplist_get (contact, QCstopbits);
8450 else
4d2b044c 8451 tem = Fplist_get (p->childp, QCstopbits);
d888760c
GM		 8452 if (NILP (tem))
8453 tem = make_number (1);
8454 CHECK_NUMBER (tem);
8455 if (XINT (tem) != 1 && XINT (tem) != 2)
8456 error (":stopbits must be nil (1 stopbit), 1, or 2");
8457 summary[2] = XINT (tem) + '0';
8458 if (XINT (tem) == 1)
8459 dcb.StopBits = ONESTOPBIT;
8460 else if (XINT (tem) == 2)
8461 dcb.StopBits = TWOSTOPBITS;
8462 childp2 = Fplist_put (childp2, QCstopbits, tem);
8463
8464 /* Configure flowcontrol. */
8465 if (!NILP (Fplist_member (contact, QCflowcontrol)))
8466 tem = Fplist_get (contact, QCflowcontrol);
8467 else
4d2b044c 8468 tem = Fplist_get (p->childp, QCflowcontrol);
d888760c
GM		 8469 if (!NILP (tem) && !EQ (tem, Qhw) && !EQ (tem, Qsw))
8470 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
8471 dcb.fOutxCtsFlow = FALSE;
8472 dcb.fOutxDsrFlow = FALSE;
8473 dcb.fDtrControl = DTR_CONTROL_DISABLE;
8474 dcb.fDsrSensitivity = FALSE;
8475 dcb.fTXContinueOnXoff = FALSE;
8476 dcb.fOutX = FALSE;
8477 dcb.fInX = FALSE;
8478 dcb.fRtsControl = RTS_CONTROL_DISABLE;
8479 dcb.XonChar = 17; /* Control-Q */
8480 dcb.XoffChar = 19; /* Control-S */
8481 if (NILP (tem))
8482 {
8483 /* Already configured. */
8484 }
8485 else if (EQ (tem, Qhw))
8486 {
8487 dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
8488 dcb.fOutxCtsFlow = TRUE;
8489 }
8490 else if (EQ (tem, Qsw))
8491 {
8492 dcb.fOutX = TRUE;
8493 dcb.fInX = TRUE;
8494 }
8495 childp2 = Fplist_put (childp2, QCflowcontrol, tem);
8496
8497 /* Activate configuration. */
8498 if (!SetCommState (hnd, &dcb))
8499 error ("SetCommState() failed");
8500
8501 childp2 = Fplist_put (childp2, QCsummary, build_string (summary));
6a09a33b 8502 pset_childp (p, childp2);
d888760c
GM		 8503}
8504
e061a11b
TZ		 8505#ifdef HAVE_GNUTLS
8506
8507ssize_t
8508emacs_gnutls_pull (gnutls_transport_ptr_t p, void* buf, size_t sz)
8509{
d78cf5ed 8510 int n, err;
e061a11b 8511 SELECT_TYPE fdset;
43aac990 8512 struct timespec timeout;
e061a11b
TZ		 8513 struct Lisp_Process *process = (struct Lisp_Process *)p;
8514 int fd = process->infd;
8515
d78cf5ed 8516 n = sys_read (fd, (char*)buf, sz);
e061a11b 8517
d78cf5ed
CB		 8518 if (n >= 0)
8519 return n;
e061a11b 8520
d78cf5ed 8521 err = errno;
e061a11b 8522
d78cf5ed
CB		 8523 /* Translate the WSAEWOULDBLOCK alias EWOULDBLOCK to EAGAIN. */
8524 if (err == EWOULDBLOCK)
8525 err = EAGAIN;
e061a11b 8526
d78cf5ed 8527 emacs_gnutls_transport_set_errno (process->gnutls_state, err);
e061a11b 8528
d78cf5ed 8529 return -1;
e061a11b 8530}
ab5796a9 8531
e061a11b
TZ		 8532ssize_t
8533emacs_gnutls_push (gnutls_transport_ptr_t p, const void* buf, size_t sz)
8534{
8535 struct Lisp_Process *process = (struct Lisp_Process *)p;
42ce4c63 8536 int fd = process->outfd;
5e617bc2 8537 ssize_t n = sys_write (fd, buf, sz);
e061a11b
TZ		 8538
8539 /* 0 or more bytes written means everything went fine. */
8540 if (n >= 0)
8541 return n;
8542
8543 /* Negative bytes written means we got an error in errno.
8544 Translate the WSAEWOULDBLOCK alias EWOULDBLOCK to EAGAIN. */
0898ca10
JB		 8545 emacs_gnutls_transport_set_errno (process->gnutls_state,
8546 errno == EWOULDBLOCK ? EAGAIN : errno);
e061a11b
TZ		 8547
8548 return -1;
8549}
8550#endif /* HAVE_GNUTLS */
8551
8552/* end of w32.c */
Unnamed repository; edit this file 'description' to name the repository.