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* emacs-lisp/byte-run.el (defmacro): Use same argument parsing as
[bpt/emacs.git] / src / w32.c
CommitLineData
b46a6a83 1/* Utility and Unix shadow routines for GNU Emacs on the Microsoft Windows API.
acaf905b 2 Copyright (C) 1994-1995, 2000-2012 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*/
76b3903d 22#include <stddef.h> /* for offsetof */
95ed0025
RS		 23#include <stdlib.h>
24#include <stdio.h>
ad9e2d54 25#include <float.h> /* for DBL_EPSILON */
95ed0025 26#include <io.h>
480b0c5b 27#include <errno.h>
95ed0025
RS		 28#include <fcntl.h>
29#include <ctype.h>
480b0c5b 30#include <signal.h>
b3308d2e 31#include <sys/file.h>
480b0c5b 32#include <sys/time.h>
16bb7578 33#include <sys/utime.h>
7c80d5ec 34#include <math.h>
97a93095 35#include <time.h>
480b0c5b
GV		 36
37/* must include CRT headers *before* config.h */
4838e624 38
4838e624 39#include <config.h>
0fda9b75 40#include <mbstring.h> /* for _mbspbrk */
4838e624 41
480b0c5b
GV		 42#undef access
43#undef chdir
44#undef chmod
45#undef creat
46#undef ctime
47#undef fopen
48#undef link
49#undef mkdir
50#undef mktemp
51#undef open
52#undef rename
53#undef rmdir
54#undef unlink
55
56#undef close
57#undef dup
58#undef dup2
59#undef pipe
60#undef read
61#undef write
95ed0025 62
d8fcc1b9
AI		 63#undef strerror
64
97a93095
EZ		 65#undef localtime
66
95ed0025 67#include "lisp.h"
95ed0025
RS		 68
69#include <pwd.h>
3d19b645 70#include <grp.h>
95ed0025 71
971bce75
AI		 72#ifdef __GNUC__
73#define _ANONYMOUS_UNION
74#define _ANONYMOUS_STRUCT
75#endif
480b0c5b 76#include <windows.h>
b8526f6e
EZ		 77/* Some versions of compiler define MEMORYSTATUSEX, some don't, so we
78 use a different name to avoid compilation problems. */
79typedef struct _MEMORY_STATUS_EX {
bedf4aab
JB		 80 DWORD dwLength;
81 DWORD dwMemoryLoad;
82 DWORDLONG ullTotalPhys;
83 DWORDLONG ullAvailPhys;
84 DWORDLONG ullTotalPageFile;
85 DWORDLONG ullAvailPageFile;
86 DWORDLONG ullTotalVirtual;
87 DWORDLONG ullAvailVirtual;
88 DWORDLONG ullAvailExtendedVirtual;
b8526f6e 89} MEMORY_STATUS_EX,*LPMEMORY_STATUS_EX;
7c80d5ec 90
634d3003 91#include <lmcons.h>
2d5324c5 92#include <shlobj.h>
00b3b7b3 93
7c80d5ec
EZ		 94#include <tlhelp32.h>
95#include <psapi.h>
a6fc3b5c 96#ifndef _MSC_VER
69e847be 97#include <w32api.h>
a6fc3b5c 98#endif
5e617bc2 99#if !defined (__MINGW32__) || __W32API_MAJOR_VERSION < 3 || (__W32API_MAJOR_VERSION == 3 && __W32API_MINOR_VERSION < 15)
7c80d5ec 100/* This either is not in psapi.h or guarded by higher value of
a6d3e72e 101 _WIN32_WINNT than what we use. w32api supplied with MinGW 3.15
69e847be 102 defines it in psapi.h */
7c80d5ec 103typedef struct _PROCESS_MEMORY_COUNTERS_EX {
cb576b5c
FP		 104 DWORD cb;
105 DWORD PageFaultCount;
106 SIZE_T PeakWorkingSetSize;
107 SIZE_T WorkingSetSize;
108 SIZE_T QuotaPeakPagedPoolUsage;
109 SIZE_T QuotaPagedPoolUsage;
110 SIZE_T QuotaPeakNonPagedPoolUsage;
111 SIZE_T QuotaNonPagedPoolUsage;
112 SIZE_T PagefileUsage;
113 SIZE_T PeakPagefileUsage;
114 SIZE_T PrivateUsage;
7c80d5ec 115} PROCESS_MEMORY_COUNTERS_EX,*PPROCESS_MEMORY_COUNTERS_EX;
69e847be 116#endif
7c80d5ec 117
6dad7178
EZ		 118#include <winioctl.h>
119#include <aclapi.h>
120
121#ifdef _MSC_VER
88c4a13c
EZ		 122/* MSVC doesn't provide the definition of REPARSE_DATA_BUFFER and the
123 associated macros, except on ntifs.h, which cannot be included
124 because it triggers conflicts with other Windows API headers. So
125 we define it here by hand. */
6dad7178
EZ		 126
127typedef struct _REPARSE_DATA_BUFFER {
128 ULONG ReparseTag;
129 USHORT ReparseDataLength;
130 USHORT Reserved;
131 union {
132 struct {
133 USHORT SubstituteNameOffset;
134 USHORT SubstituteNameLength;
135 USHORT PrintNameOffset;
136 USHORT PrintNameLength;
137 ULONG Flags;
138 WCHAR PathBuffer[1];
139 } SymbolicLinkReparseBuffer;
140 struct {
141 USHORT SubstituteNameOffset;
142 USHORT SubstituteNameLength;
143 USHORT PrintNameOffset;
144 USHORT PrintNameLength;
145 WCHAR PathBuffer[1];
146 } MountPointReparseBuffer;
147 struct {
148 UCHAR DataBuffer[1];
149 } GenericReparseBuffer;
150 } DUMMYUNIONNAME;
151} REPARSE_DATA_BUFFER, *PREPARSE_DATA_BUFFER;
152
c7b36b95 153#ifndef FILE_DEVICE_FILE_SYSTEM
88c4a13c 154#define FILE_DEVICE_FILE_SYSTEM 9
c7b36b95
FP		 155#endif
156#ifndef METHOD_BUFFERED
88c4a13c 157#define METHOD_BUFFERED 0
c7b36b95
FP		 158#endif
159#ifndef FILE_ANY_ACCESS
88c4a13c 160#define FILE_ANY_ACCESS 0x00000000
c7b36b95
FP		 161#endif
162#ifndef CTL_CODE
88c4a13c 163#define CTL_CODE(t,f,m,a) (((t)<<16)|((a)<<14)|((f)<<2)|(m))
c7b36b95 164#endif
88c4a13c
EZ		 165#define FSCTL_GET_REPARSE_POINT \
166 CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 42, METHOD_BUFFERED, FILE_ANY_ACCESS)
6dad7178
EZ		 167#endif
168
7d701334 169/* TCP connection support. */
480b0c5b
GV		 170#include <sys/socket.h>
171#undef socket
172#undef bind
173#undef connect
174#undef htons
175#undef ntohs
176#undef inet_addr
177#undef gethostname
178#undef gethostbyname
179#undef getservbyname
ecd270eb 180#undef getpeername
380961a6 181#undef shutdown
962955c5
JR		 182#undef setsockopt
183#undef listen
184#undef getsockname
185#undef accept
186#undef recvfrom
187#undef sendto
00b3b7b3 188
489f9371 189#include "w32.h"
480b0c5b 190#include "ndir.h"
501199a3 191#include "w32common.h"
489f9371 192#include "w32heap.h"
a68089e4 193#include "w32select.h"
253574a6 194#include "systime.h"
f481eb31 195#include "dispextern.h" /* for xstrcasecmp */
7c80d5ec 196#include "coding.h" /* for Vlocale_coding_system */
253574a6 197
973f782d
EZ		 198#include "careadlinkat.h"
199#include "allocator.h"
200
1eb8fd91 201/* For serial_configure and serial_open. */
d888760c 202#include "process.h"
d888760c 203
2d5324c5
JR		 204typedef HRESULT (WINAPI * ShGetFolderPath_fn)
205 (IN HWND, IN int, IN HANDLE, IN DWORD, OUT char *);
206
0898ca10
JB		 207Lisp_Object QCloaded_from;
208
b56ceb92 209void globals_of_w32 (void);
8aaaec6b 210static DWORD get_rid (PSID);
6dad7178
EZ		 211static int is_symlink (const char *);
212static char * chase_symlinks (const char *);
213static int enable_privilege (LPCTSTR, BOOL, TOKEN_PRIVILEGES *);
214static int restore_privilege (TOKEN_PRIVILEGES *);
215static BOOL WINAPI revert_to_self (void);
9785d95b 216
a68089e4
EZ		 217extern int sys_access (const char *, int);
218extern void *e_malloc (size_t);
219extern int sys_select (int, SELECT_TYPE *, SELECT_TYPE *, SELECT_TYPE *,
220 EMACS_TIME *, void *);
221
222
18e070ac 223\f
9d95a291
EZ		 224/* Initialization states.
225
226 WARNING: If you add any more such variables for additional APIs,
227 you MUST add initialization for them to globals_of_w32
228 below. This is because these variables might get set
229 to non-NULL values during dumping, but the dumped Emacs
230 cannot reuse those values, because it could be run on a
231 different version of the OS, where API addresses are
232 different. */
9785d95b
BK		 233static BOOL g_b_init_is_windows_9x;
234static BOOL g_b_init_open_process_token;
235static BOOL g_b_init_get_token_information;
236static BOOL g_b_init_lookup_account_sid;
c617afce
EZ		 237static BOOL g_b_init_get_sid_sub_authority;
238static BOOL g_b_init_get_sid_sub_authority_count;
6dad7178 239static BOOL g_b_init_get_security_info;
8aaaec6b
EZ		 240static BOOL g_b_init_get_file_security;
241static BOOL g_b_init_get_security_descriptor_owner;
242static BOOL g_b_init_get_security_descriptor_group;
243static BOOL g_b_init_is_valid_sid;
7c80d5ec
EZ		 244static BOOL g_b_init_create_toolhelp32_snapshot;
245static BOOL g_b_init_process32_first;
246static BOOL g_b_init_process32_next;
247static BOOL g_b_init_open_thread_token;
248static BOOL g_b_init_impersonate_self;
249static BOOL g_b_init_revert_to_self;
250static BOOL g_b_init_get_process_memory_info;
251static BOOL g_b_init_get_process_working_set_size;
252static BOOL g_b_init_global_memory_status;
253static BOOL g_b_init_global_memory_status_ex;
f8b35b24
EZ		 254static BOOL g_b_init_get_length_sid;
255static BOOL g_b_init_equal_sid;
256static BOOL g_b_init_copy_sid;
ad9e2d54
EZ		 257static BOOL g_b_init_get_native_system_info;
258static BOOL g_b_init_get_system_times;
6dad7178 259static BOOL g_b_init_create_symbolic_link;
9785d95b 260
f60ae425
BK		 261/*
262 BEGIN: Wrapper functions around OpenProcessToken
263 and other functions in advapi32.dll that are only
264 supported in Windows NT / 2k / XP
265*/
266 /* ** Function pointer typedefs ** */
267typedef BOOL (WINAPI * OpenProcessToken_Proc) (
268 HANDLE ProcessHandle,
269 DWORD DesiredAccess,
270 PHANDLE TokenHandle);
271typedef BOOL (WINAPI * GetTokenInformation_Proc) (
272 HANDLE TokenHandle,
273 TOKEN_INFORMATION_CLASS TokenInformationClass,
274 LPVOID TokenInformation,
275 DWORD TokenInformationLength,
276 PDWORD ReturnLength);
74258518
JR		 277typedef BOOL (WINAPI * GetProcessTimes_Proc) (
278 HANDLE process_handle,
279 LPFILETIME creation_time,
280 LPFILETIME exit_time,
281 LPFILETIME kernel_time,
282 LPFILETIME user_time);
283
284GetProcessTimes_Proc get_process_times_fn = NULL;
285
f60ae425
BK		 286#ifdef _UNICODE
287const char * const LookupAccountSid_Name = "LookupAccountSidW";
8aaaec6b 288const char * const GetFileSecurity_Name = "GetFileSecurityW";
f60ae425
BK		 289#else
290const char * const LookupAccountSid_Name = "LookupAccountSidA";
8aaaec6b 291const char * const GetFileSecurity_Name = "GetFileSecurityA";
f60ae425
BK		 292#endif
293typedef BOOL (WINAPI * LookupAccountSid_Proc) (
294 LPCTSTR lpSystemName,
295 PSID Sid,
296 LPTSTR Name,
297 LPDWORD cbName,
298 LPTSTR DomainName,
299 LPDWORD cbDomainName,
300 PSID_NAME_USE peUse);
c617afce
EZ		 301typedef PDWORD (WINAPI * GetSidSubAuthority_Proc) (
302 PSID pSid,
303 DWORD n);
304typedef PUCHAR (WINAPI * GetSidSubAuthorityCount_Proc) (
305 PSID pSid);
6dad7178
EZ		 306typedef DWORD (WINAPI * GetSecurityInfo_Proc) (
307 HANDLE handle,
308 SE_OBJECT_TYPE ObjectType,
309 SECURITY_INFORMATION SecurityInfo,
310 PSID *ppsidOwner,
311 PSID *ppsidGroup,
312 PACL *ppDacl,
313 PACL *ppSacl,
314 PSECURITY_DESCRIPTOR *ppSecurityDescriptor);
8aaaec6b
EZ		 315typedef BOOL (WINAPI * GetFileSecurity_Proc) (
316 LPCTSTR lpFileName,
317 SECURITY_INFORMATION RequestedInformation,
318 PSECURITY_DESCRIPTOR pSecurityDescriptor,
319 DWORD nLength,
320 LPDWORD lpnLengthNeeded);
321typedef BOOL (WINAPI * GetSecurityDescriptorOwner_Proc) (
322 PSECURITY_DESCRIPTOR pSecurityDescriptor,
323 PSID *pOwner,
324 LPBOOL lpbOwnerDefaulted);
325typedef BOOL (WINAPI * GetSecurityDescriptorGroup_Proc) (
326 PSECURITY_DESCRIPTOR pSecurityDescriptor,
327 PSID *pGroup,
328 LPBOOL lpbGroupDefaulted);
329typedef BOOL (WINAPI * IsValidSid_Proc) (
330 PSID sid);
7c80d5ec
EZ		 331typedef HANDLE (WINAPI * CreateToolhelp32Snapshot_Proc) (
332 DWORD dwFlags,
333 DWORD th32ProcessID);
334typedef BOOL (WINAPI * Process32First_Proc) (
335 HANDLE hSnapshot,
336 LPPROCESSENTRY32 lppe);
337typedef BOOL (WINAPI * Process32Next_Proc) (
338 HANDLE hSnapshot,
339 LPPROCESSENTRY32 lppe);
340typedef BOOL (WINAPI * OpenThreadToken_Proc) (
341 HANDLE ThreadHandle,
342 DWORD DesiredAccess,
343 BOOL OpenAsSelf,
344 PHANDLE TokenHandle);
345typedef BOOL (WINAPI * ImpersonateSelf_Proc) (
346 SECURITY_IMPERSONATION_LEVEL ImpersonationLevel);
347typedef BOOL (WINAPI * RevertToSelf_Proc) (void);
348typedef BOOL (WINAPI * GetProcessMemoryInfo_Proc) (
349 HANDLE Process,
350 PPROCESS_MEMORY_COUNTERS ppsmemCounters,
351 DWORD cb);
352typedef BOOL (WINAPI * GetProcessWorkingSetSize_Proc) (
353 HANDLE hProcess,
cb576b5c
FP		 354 PSIZE_T lpMinimumWorkingSetSize,
355 PSIZE_T lpMaximumWorkingSetSize);
7c80d5ec
EZ		 356typedef BOOL (WINAPI * GlobalMemoryStatus_Proc) (
357 LPMEMORYSTATUS lpBuffer);
358typedef BOOL (WINAPI * GlobalMemoryStatusEx_Proc) (
b8526f6e 359 LPMEMORY_STATUS_EX lpBuffer);
f8b35b24
EZ		 360typedef BOOL (WINAPI * CopySid_Proc) (
361 DWORD nDestinationSidLength,
362 PSID pDestinationSid,
363 PSID pSourceSid);
364typedef BOOL (WINAPI * EqualSid_Proc) (
365 PSID pSid1,
366 PSID pSid2);
367typedef DWORD (WINAPI * GetLengthSid_Proc) (
368 PSID pSid);
ad9e2d54
EZ		 369typedef void (WINAPI * GetNativeSystemInfo_Proc) (
370 LPSYSTEM_INFO lpSystemInfo);
371typedef BOOL (WINAPI * GetSystemTimes_Proc) (
372 LPFILETIME lpIdleTime,
373 LPFILETIME lpKernelTime,
374 LPFILETIME lpUserTime);
6dad7178
EZ		 375typedef BOOLEAN (WINAPI *CreateSymbolicLink_Proc) (
376 LPTSTR lpSymlinkFileName,
377 LPTSTR lpTargetFileName,
378 DWORD dwFlags);
f8b35b24 379
f60ae425 380 /* ** A utility function ** */
9bfb11f9 381static BOOL
b56ceb92 382is_windows_9x (void)
f60ae425 383{
bedf4aab 384 static BOOL s_b_ret = 0;
f60ae425 385 OSVERSIONINFO os_ver;
9785d95b 386 if (g_b_init_is_windows_9x == 0)
f60ae425 387 {
9785d95b 388 g_b_init_is_windows_9x = 1;
ed3751c8
JB		 389 ZeroMemory (&os_ver, sizeof (OSVERSIONINFO));
390 os_ver.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
9785d95b
BK		 391 if (GetVersionEx (&os_ver))
392 {
393 s_b_ret = (os_ver.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS);
394 }
f60ae425 395 }
9785d95b 396 return s_b_ret;
f60ae425
BK		 397}
398
d35af63c
PE		 399static Lisp_Object ltime (ULONGLONG);
400
74258518 401/* Get total user and system times for get-internal-run-time.
d35af63c 402 Returns a list of integers if the times are provided by the OS
74258518
JR		 403 (NT derivatives), otherwise it returns the result of current-time. */
404Lisp_Object
b56ceb92 405w32_get_internal_run_time (void)
74258518
JR		 406{
407 if (get_process_times_fn)
408 {
409 FILETIME create, exit, kernel, user;
ed3751c8 410 HANDLE proc = GetCurrentProcess ();
74258518
JR		 411 if ((*get_process_times_fn) (proc, &create, &exit, &kernel, &user))
412 {
413 LARGE_INTEGER user_int, kernel_int, total;
74258518
JR		 414 user_int.LowPart = user.dwLowDateTime;
415 user_int.HighPart = user.dwHighDateTime;
416 kernel_int.LowPart = kernel.dwLowDateTime;
417 kernel_int.HighPart = kernel.dwHighDateTime;
418 total.QuadPart = user_int.QuadPart + kernel_int.QuadPart;
d35af63c 419 return ltime (total.QuadPart);
74258518
JR		 420 }
421 }
422
423 return Fcurrent_time ();
424}
425
f60ae425
BK		 426 /* ** The wrapper functions ** */
427
bedf4aab
JB		 428static BOOL WINAPI
429open_process_token (HANDLE ProcessHandle,
430 DWORD DesiredAccess,
431 PHANDLE TokenHandle)
f60ae425 432{
9785d95b 433 static OpenProcessToken_Proc s_pfn_Open_Process_Token = NULL;
f60ae425
BK		 434 HMODULE hm_advapi32 = NULL;
435 if (is_windows_9x () == TRUE)
436 {
437 return FALSE;
438 }
9785d95b
BK		 439 if (g_b_init_open_process_token == 0)
440 {
441 g_b_init_open_process_token = 1;
442 hm_advapi32 = LoadLibrary ("Advapi32.dll");
443 s_pfn_Open_Process_Token =
444 (OpenProcessToken_Proc) GetProcAddress (hm_advapi32, "OpenProcessToken");
445 }
446 if (s_pfn_Open_Process_Token == NULL)
f60ae425
BK		 447 {
448 return FALSE;
449 }
450 return (
9785d95b 451 s_pfn_Open_Process_Token (
f60ae425
BK		 452 ProcessHandle,
453 DesiredAccess,
454 TokenHandle)
455 );
456}
457
bedf4aab
JB		 458static BOOL WINAPI
459get_token_information (HANDLE TokenHandle,
460 TOKEN_INFORMATION_CLASS TokenInformationClass,
461 LPVOID TokenInformation,
462 DWORD TokenInformationLength,
463 PDWORD ReturnLength)
f60ae425 464{
9785d95b 465 static GetTokenInformation_Proc s_pfn_Get_Token_Information = NULL;
f60ae425
BK		 466 HMODULE hm_advapi32 = NULL;
467 if (is_windows_9x () == TRUE)
468 {
469 return FALSE;
470 }
9785d95b
BK		 471 if (g_b_init_get_token_information == 0)
472 {
473 g_b_init_get_token_information = 1;
474 hm_advapi32 = LoadLibrary ("Advapi32.dll");
475 s_pfn_Get_Token_Information =
476 (GetTokenInformation_Proc) GetProcAddress (hm_advapi32, "GetTokenInformation");
477 }
478 if (s_pfn_Get_Token_Information == NULL)
f60ae425
BK		 479 {
480 return FALSE;
481 }
482 return (
9785d95b 483 s_pfn_Get_Token_Information (
f60ae425
BK		 484 TokenHandle,
485 TokenInformationClass,
486 TokenInformation,
487 TokenInformationLength,
488 ReturnLength)
489 );
490}
491
bedf4aab
JB		 492static BOOL WINAPI
493lookup_account_sid (LPCTSTR lpSystemName,
494 PSID Sid,
495 LPTSTR Name,
496 LPDWORD cbName,
497 LPTSTR DomainName,
498 LPDWORD cbDomainName,
499 PSID_NAME_USE peUse)
f60ae425 500{
9785d95b 501 static LookupAccountSid_Proc s_pfn_Lookup_Account_Sid = 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_lookup_account_sid == 0)
508 {
509 g_b_init_lookup_account_sid = 1;
510 hm_advapi32 = LoadLibrary ("Advapi32.dll");
511 s_pfn_Lookup_Account_Sid =
512 (LookupAccountSid_Proc) GetProcAddress (hm_advapi32, LookupAccountSid_Name);
513 }
514 if (s_pfn_Lookup_Account_Sid == NULL)
f60ae425
BK		 515 {
516 return FALSE;
517 }
518 return (
9785d95b 519 s_pfn_Lookup_Account_Sid (
f60ae425
BK		 520 lpSystemName,
521 Sid,
522 Name,
523 cbName,
524 DomainName,
525 cbDomainName,
526 peUse)
527 );
528}
529
bedf4aab
JB		 530static PDWORD WINAPI
531get_sid_sub_authority (PSID pSid, DWORD n)
c617afce
EZ		 532{
533 static GetSidSubAuthority_Proc s_pfn_Get_Sid_Sub_Authority = NULL;
6811b9f4 534 static DWORD zero = 0U;
c617afce
EZ		 535 HMODULE hm_advapi32 = NULL;
536 if (is_windows_9x () == TRUE)
537 {
6811b9f4 538 return &zero;
c617afce
EZ		 539 }
540 if (g_b_init_get_sid_sub_authority == 0)
541 {
542 g_b_init_get_sid_sub_authority = 1;
543 hm_advapi32 = LoadLibrary ("Advapi32.dll");
544 s_pfn_Get_Sid_Sub_Authority =
545 (GetSidSubAuthority_Proc) GetProcAddress (
546 hm_advapi32, "GetSidSubAuthority");
547 }
548 if (s_pfn_Get_Sid_Sub_Authority == NULL)
549 {
6811b9f4 550 return &zero;
c617afce
EZ		 551 }
552 return (s_pfn_Get_Sid_Sub_Authority (pSid, n));
553}
554
bedf4aab
JB		 555static PUCHAR WINAPI
556get_sid_sub_authority_count (PSID pSid)
c617afce
EZ		 557{
558 static GetSidSubAuthorityCount_Proc s_pfn_Get_Sid_Sub_Authority_Count = NULL;
6811b9f4 559 static UCHAR zero = 0U;
c617afce
EZ		 560 HMODULE hm_advapi32 = NULL;
561 if (is_windows_9x () == TRUE)
562 {
6811b9f4 563 return &zero;
c617afce
EZ		 564 }
565 if (g_b_init_get_sid_sub_authority_count == 0)
566 {
567 g_b_init_get_sid_sub_authority_count = 1;
568 hm_advapi32 = LoadLibrary ("Advapi32.dll");
569 s_pfn_Get_Sid_Sub_Authority_Count =
570 (GetSidSubAuthorityCount_Proc) GetProcAddress (
571 hm_advapi32, "GetSidSubAuthorityCount");
572 }
573 if (s_pfn_Get_Sid_Sub_Authority_Count == NULL)
574 {
6811b9f4 575 return &zero;
c617afce
EZ		 576 }
577 return (s_pfn_Get_Sid_Sub_Authority_Count (pSid));
578}
579
6dad7178
EZ		 580static DWORD WINAPI
581get_security_info (HANDLE handle,
582 SE_OBJECT_TYPE ObjectType,
583 SECURITY_INFORMATION SecurityInfo,
584 PSID *ppsidOwner,
585 PSID *ppsidGroup,
586 PACL *ppDacl,
587 PACL *ppSacl,
588 PSECURITY_DESCRIPTOR *ppSecurityDescriptor)
589{
590 static GetSecurityInfo_Proc s_pfn_Get_Security_Info = NULL;
591 HMODULE hm_advapi32 = NULL;
592 if (is_windows_9x () == TRUE)
593 {
594 return FALSE;
595 }
596 if (g_b_init_get_security_info == 0)
597 {
598 g_b_init_get_security_info = 1;
599 hm_advapi32 = LoadLibrary ("Advapi32.dll");
600 s_pfn_Get_Security_Info =
601 (GetSecurityInfo_Proc) GetProcAddress (
602 hm_advapi32, "GetSecurityInfo");
603 }
604 if (s_pfn_Get_Security_Info == NULL)
605 {
606 return FALSE;
607 }
608 return (s_pfn_Get_Security_Info (handle, ObjectType, SecurityInfo,
609 ppsidOwner, ppsidGroup, ppDacl, ppSacl,
610 ppSecurityDescriptor));
611}
612
bedf4aab
JB		 613static BOOL WINAPI
614get_file_security (LPCTSTR lpFileName,
615 SECURITY_INFORMATION RequestedInformation,
616 PSECURITY_DESCRIPTOR pSecurityDescriptor,
617 DWORD nLength,
618 LPDWORD lpnLengthNeeded)
8aaaec6b
EZ		 619{
620 static GetFileSecurity_Proc s_pfn_Get_File_Security = NULL;
621 HMODULE hm_advapi32 = NULL;
622 if (is_windows_9x () == TRUE)
623 {
624 return FALSE;
625 }
626 if (g_b_init_get_file_security == 0)
627 {
628 g_b_init_get_file_security = 1;
629 hm_advapi32 = LoadLibrary ("Advapi32.dll");
630 s_pfn_Get_File_Security =
631 (GetFileSecurity_Proc) GetProcAddress (
632 hm_advapi32, GetFileSecurity_Name);
633 }
634 if (s_pfn_Get_File_Security == NULL)
635 {
636 return FALSE;
637 }
638 return (s_pfn_Get_File_Security (lpFileName, RequestedInformation,
639 pSecurityDescriptor, nLength,
640 lpnLengthNeeded));
641}
642
bedf4aab
JB		 643static BOOL WINAPI
644get_security_descriptor_owner (PSECURITY_DESCRIPTOR pSecurityDescriptor,
645 PSID *pOwner,
646 LPBOOL lpbOwnerDefaulted)
8aaaec6b
EZ		 647{
648 static GetSecurityDescriptorOwner_Proc s_pfn_Get_Security_Descriptor_Owner = NULL;
649 HMODULE hm_advapi32 = NULL;
650 if (is_windows_9x () == TRUE)
651 {
652 return FALSE;
653 }
654 if (g_b_init_get_security_descriptor_owner == 0)
655 {
656 g_b_init_get_security_descriptor_owner = 1;
657 hm_advapi32 = LoadLibrary ("Advapi32.dll");
658 s_pfn_Get_Security_Descriptor_Owner =
659 (GetSecurityDescriptorOwner_Proc) GetProcAddress (
660 hm_advapi32, "GetSecurityDescriptorOwner");
661 }
662 if (s_pfn_Get_Security_Descriptor_Owner == NULL)
663 {
664 return FALSE;
665 }
666 return (s_pfn_Get_Security_Descriptor_Owner (pSecurityDescriptor, pOwner,
667 lpbOwnerDefaulted));
668}
669
bedf4aab
JB		 670static BOOL WINAPI
671get_security_descriptor_group (PSECURITY_DESCRIPTOR pSecurityDescriptor,
672 PSID *pGroup,
673 LPBOOL lpbGroupDefaulted)
8aaaec6b
EZ		 674{
675 static GetSecurityDescriptorGroup_Proc s_pfn_Get_Security_Descriptor_Group = NULL;
676 HMODULE hm_advapi32 = NULL;
677 if (is_windows_9x () == TRUE)
678 {
679 return FALSE;
680 }
681 if (g_b_init_get_security_descriptor_group == 0)
682 {
683 g_b_init_get_security_descriptor_group = 1;
684 hm_advapi32 = LoadLibrary ("Advapi32.dll");
685 s_pfn_Get_Security_Descriptor_Group =
686 (GetSecurityDescriptorGroup_Proc) GetProcAddress (
687 hm_advapi32, "GetSecurityDescriptorGroup");
688 }
689 if (s_pfn_Get_Security_Descriptor_Group == NULL)
690 {
691 return FALSE;
692 }
693 return (s_pfn_Get_Security_Descriptor_Group (pSecurityDescriptor, pGroup,
694 lpbGroupDefaulted));
695}
696
bedf4aab
JB		 697static BOOL WINAPI
698is_valid_sid (PSID sid)
8aaaec6b
EZ		 699{
700 static IsValidSid_Proc s_pfn_Is_Valid_Sid = NULL;
701 HMODULE hm_advapi32 = NULL;
702 if (is_windows_9x () == TRUE)
703 {
704 return FALSE;
705 }
706 if (g_b_init_is_valid_sid == 0)
707 {
708 g_b_init_is_valid_sid = 1;
709 hm_advapi32 = LoadLibrary ("Advapi32.dll");
710 s_pfn_Is_Valid_Sid =
711 (IsValidSid_Proc) GetProcAddress (
712 hm_advapi32, "IsValidSid");
713 }
714 if (s_pfn_Is_Valid_Sid == NULL)
715 {
716 return FALSE;
717 }
718 return (s_pfn_Is_Valid_Sid (sid));
719}
720
bedf4aab
JB		 721static BOOL WINAPI
722equal_sid (PSID sid1, PSID sid2)
f8b35b24
EZ		 723{
724 static EqualSid_Proc s_pfn_Equal_Sid = NULL;
725 HMODULE hm_advapi32 = NULL;
726 if (is_windows_9x () == TRUE)
727 {
728 return FALSE;
729 }
730 if (g_b_init_equal_sid == 0)
731 {
732 g_b_init_equal_sid = 1;
733 hm_advapi32 = LoadLibrary ("Advapi32.dll");
734 s_pfn_Equal_Sid =
735 (EqualSid_Proc) GetProcAddress (
736 hm_advapi32, "EqualSid");
737 }
738 if (s_pfn_Equal_Sid == NULL)
739 {
740 return FALSE;
741 }
742 return (s_pfn_Equal_Sid (sid1, sid2));
743}
744
bedf4aab
JB		 745static DWORD WINAPI
746get_length_sid (PSID sid)
f8b35b24
EZ		 747{
748 static GetLengthSid_Proc s_pfn_Get_Length_Sid = NULL;
749 HMODULE hm_advapi32 = NULL;
750 if (is_windows_9x () == TRUE)
751 {
752 return 0;
753 }
754 if (g_b_init_get_length_sid == 0)
755 {
756 g_b_init_get_length_sid = 1;
757 hm_advapi32 = LoadLibrary ("Advapi32.dll");
758 s_pfn_Get_Length_Sid =
759 (GetLengthSid_Proc) GetProcAddress (
760 hm_advapi32, "GetLengthSid");
761 }
762 if (s_pfn_Get_Length_Sid == NULL)
763 {
764 return 0;
765 }
766 return (s_pfn_Get_Length_Sid (sid));
767}
768
bedf4aab
JB		 769static BOOL WINAPI
770copy_sid (DWORD destlen, PSID dest, PSID src)
f8b35b24
EZ		 771{
772 static CopySid_Proc s_pfn_Copy_Sid = NULL;
773 HMODULE hm_advapi32 = NULL;
774 if (is_windows_9x () == TRUE)
775 {
776 return FALSE;
777 }
778 if (g_b_init_copy_sid == 0)
779 {
780 g_b_init_copy_sid = 1;
781 hm_advapi32 = LoadLibrary ("Advapi32.dll");
782 s_pfn_Copy_Sid =
783 (CopySid_Proc) GetProcAddress (
784 hm_advapi32, "CopySid");
785 }
786 if (s_pfn_Copy_Sid == NULL)
787 {
788 return FALSE;
789 }
790 return (s_pfn_Copy_Sid (destlen, dest, src));
791}
792
f60ae425
BK		 793/*
794 END: Wrapper functions around OpenProcessToken
795 and other functions in advapi32.dll that are only
796 supported in Windows NT / 2k / XP
797*/
798
bedf4aab
JB		 799static void WINAPI
800get_native_system_info (LPSYSTEM_INFO lpSystemInfo)
ad9e2d54
EZ		 801{
802 static GetNativeSystemInfo_Proc s_pfn_Get_Native_System_Info = NULL;
803 if (is_windows_9x () != TRUE)
804 {
805 if (g_b_init_get_native_system_info == 0)
806 {
807 g_b_init_get_native_system_info = 1;
808 s_pfn_Get_Native_System_Info =
809 (GetNativeSystemInfo_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
810 "GetNativeSystemInfo");
811 }
812 if (s_pfn_Get_Native_System_Info != NULL)
813 s_pfn_Get_Native_System_Info (lpSystemInfo);
814 }
815 else
816 lpSystemInfo->dwNumberOfProcessors = -1;
817}
818
bedf4aab
JB		 819static BOOL WINAPI
820get_system_times (LPFILETIME lpIdleTime,
821 LPFILETIME lpKernelTime,
822 LPFILETIME lpUserTime)
ad9e2d54
EZ		 823{
824 static GetSystemTimes_Proc s_pfn_Get_System_times = NULL;
825 if (is_windows_9x () == TRUE)
826 {
827 return FALSE;
828 }
829 if (g_b_init_get_system_times == 0)
830 {
831 g_b_init_get_system_times = 1;
832 s_pfn_Get_System_times =
833 (GetSystemTimes_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
834 "GetSystemTimes");
835 }
836 if (s_pfn_Get_System_times == NULL)
837 return FALSE;
838 return (s_pfn_Get_System_times (lpIdleTime, lpKernelTime, lpUserTime));
839}
6dad7178
EZ		 840
841static BOOLEAN WINAPI
842create_symbolic_link (LPTSTR lpSymlinkFilename,
843 LPTSTR lpTargetFileName,
844 DWORD dwFlags)
845{
846 static CreateSymbolicLink_Proc s_pfn_Create_Symbolic_Link = NULL;
847 BOOLEAN retval;
848
849 if (is_windows_9x () == TRUE)
850 {
851 errno = ENOSYS;
852 return 0;
853 }
854 if (g_b_init_create_symbolic_link == 0)
855 {
856 g_b_init_create_symbolic_link = 1;
857#ifdef _UNICODE
858 s_pfn_Create_Symbolic_Link =
859 (CreateSymbolicLink_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
860 "CreateSymbolicLinkW");
861#else
862 s_pfn_Create_Symbolic_Link =
863 (CreateSymbolicLink_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
864 "CreateSymbolicLinkA");
865#endif
866 }
867 if (s_pfn_Create_Symbolic_Link == NULL)
868 {
869 errno = ENOSYS;
870 return 0;
871 }
872
873 retval = s_pfn_Create_Symbolic_Link (lpSymlinkFilename, lpTargetFileName,
874 dwFlags);
875 /* If we were denied creation of the symlink, try again after
876 enabling the SeCreateSymbolicLinkPrivilege for our process. */
877 if (!retval)
878 {
879 TOKEN_PRIVILEGES priv_current;
880
881 if (enable_privilege (SE_CREATE_SYMBOLIC_LINK_NAME, TRUE, &priv_current))
882 {
883 retval = s_pfn_Create_Symbolic_Link (lpSymlinkFilename, lpTargetFileName,
884 dwFlags);
885 restore_privilege (&priv_current);
886 revert_to_self ();
887 }
888 }
889 return retval;
890}
f60ae425 891\f
18e070ac 892
ed91b2ad
EZ		 893/* Return 1 if P is a valid pointer to an object of size SIZE. Return
894 0 if P is NOT a valid pointer. Return -1 if we cannot validate P.
895
896 This is called from alloc.c:valid_pointer_p. */
897int
898w32_valid_pointer_p (void *p, int size)
899{
900 SIZE_T done;
901 HANDLE h = OpenProcess (PROCESS_VM_READ, FALSE, GetCurrentProcessId ());
902
903 if (h)
904 {
905 unsigned char *buf = alloca (size);
906 int retval = ReadProcessMemory (h, p, buf, size, &done);
907
908 CloseHandle (h);
909 return retval;
910 }
911 else
912 return -1;
913}
914
76b3903d 915static char startup_dir[MAXPATHLEN];
00b3b7b3 916
95ed0025 917/* Get the current working directory. */
480b0c5b 918char *
95ed0025
RS		 919getwd (char *dir)
920{
76b3903d 921#if 0
480b0c5b
GV		 922 if (GetCurrentDirectory (MAXPATHLEN, dir) > 0)
923 return dir;
924 return NULL;
76b3903d 925#else
8d38f461
EZ		 926 /* Emacs doesn't actually change directory itself, it stays in the
927 same directory where it was started. */
76b3903d
GV		 928 strcpy (dir, startup_dir);
929 return dir;
930#endif
95ed0025
RS		 931}
932
95ed0025 933/* Emulate getloadavg. */
ad9e2d54
EZ		 934
935struct load_sample {
936 time_t sample_time;
937 ULONGLONG idle;
938 ULONGLONG kernel;
939 ULONGLONG user;
940};
941
942/* Number of processors on this machine. */
943static unsigned num_of_processors;
944
945/* We maintain 1-sec samples for the last 16 minutes in a circular buffer. */
946static struct load_sample samples[16*60];
947static int first_idx = -1, last_idx = -1;
948static int max_idx = sizeof (samples) / sizeof (samples[0]);
949
950static int
951buf_next (int from)
952{
953 int next_idx = from + 1;
954
955 if (next_idx >= max_idx)
956 next_idx = 0;
957
958 return next_idx;
959}
960
961static int
962buf_prev (int from)
963{
964 int prev_idx = from - 1;
965
966 if (prev_idx < 0)
967 prev_idx = max_idx - 1;
968
969 return prev_idx;
970}
971
972static void
973sample_system_load (ULONGLONG *idle, ULONGLONG *kernel, ULONGLONG *user)
974{
975 SYSTEM_INFO sysinfo;
976 FILETIME ft_idle, ft_user, ft_kernel;
977
978 /* Initialize the number of processors on this machine. */
979 if (num_of_processors <= 0)
980 {
981 get_native_system_info (&sysinfo);
982 num_of_processors = sysinfo.dwNumberOfProcessors;
983 if (num_of_processors <= 0)
984 {
985 GetSystemInfo (&sysinfo);
986 num_of_processors = sysinfo.dwNumberOfProcessors;
987 }
988 if (num_of_processors <= 0)
989 num_of_processors = 1;
990 }
991
992 /* TODO: Take into account threads that are ready to run, by
993 sampling the "\System\Processor Queue Length" performance
994 counter. The code below accounts only for threads that are
995 actually running. */
996
997 if (get_system_times (&ft_idle, &ft_kernel, &ft_user))
998 {
999 ULARGE_INTEGER uidle, ukernel, uuser;
1000
1001 memcpy (&uidle, &ft_idle, sizeof (ft_idle));
1002 memcpy (&ukernel, &ft_kernel, sizeof (ft_kernel));
1003 memcpy (&uuser, &ft_user, sizeof (ft_user));
1004 *idle = uidle.QuadPart;
1005 *kernel = ukernel.QuadPart;
1006 *user = uuser.QuadPart;
1007 }
1008 else
1009 {
1010 *idle = 0;
1011 *kernel = 0;
1012 *user = 0;
1013 }
1014}
1015
1016/* Produce the load average for a given time interval, using the
1017 samples in the samples[] array. WHICH can be 0, 1, or 2, meaning
1018 1-minute, 5-minute, or 15-minute average, respectively. */
1019static double
1020getavg (int which)
1021{
1022 double retval = -1.0;
1023 double tdiff;
1024 int idx;
1025 double span = (which == 0 ? 1.0 : (which == 1 ? 5.0 : 15.0)) * 60;
1026 time_t now = samples[last_idx].sample_time;
1027
1028 if (first_idx != last_idx)
1029 {
1030 for (idx = buf_prev (last_idx); ; idx = buf_prev (idx))
1031 {
1032 tdiff = difftime (now, samples[idx].sample_time);
1033 if (tdiff >= span - 2*DBL_EPSILON*now)
1034 {
1035 long double sys =
1036 samples[last_idx].kernel + samples[last_idx].user
1037 - (samples[idx].kernel + samples[idx].user);
1038 long double idl = samples[last_idx].idle - samples[idx].idle;
1039
1040 retval = (1.0 - idl / sys) * num_of_processors;
1041 break;
1042 }
1043 if (idx == first_idx)
1044 break;
1045 }
1046 }
1047
1048 return retval;
1049}
1050
95ed0025
RS		 1051int
1052getloadavg (double loadavg[], int nelem)
1053{
ad9e2d54
EZ		 1054 int elem;
1055 ULONGLONG idle, kernel, user;
1056 time_t now = time (NULL);
1057
1058 /* Store another sample. We ignore samples that are less than 1 sec
1059 apart. */
1060 if (difftime (now, samples[last_idx].sample_time) >= 1.0 - 2*DBL_EPSILON*now)
1061 {
1062 sample_system_load (&idle, &kernel, &user);
1063 last_idx = buf_next (last_idx);
1064 samples[last_idx].sample_time = now;
1065 samples[last_idx].idle = idle;
1066 samples[last_idx].kernel = kernel;
1067 samples[last_idx].user = user;
1068 /* If the buffer has more that 15 min worth of samples, discard
1069 the old ones. */
1070 if (first_idx == -1)
1071 first_idx = last_idx;
1072 while (first_idx != last_idx
1073 && (difftime (now, samples[first_idx].sample_time)
1074 >= 15.0*60 + 2*DBL_EPSILON*now))
1075 first_idx = buf_next (first_idx);
1076 }
95ed0025 1077
ad9e2d54 1078 for (elem = 0; elem < nelem; elem++)
95ed0025 1079 {
ad9e2d54
EZ		 1080 double avg = getavg (elem);
1081
1082 if (avg < 0)
1083 break;
1084 loadavg[elem] = avg;
95ed0025 1085 }
ad9e2d54
EZ		 1086
1087 return elem;
95ed0025
RS		 1088}
1089
480b0c5b 1090/* Emulate getpwuid, getpwnam and others. */
95ed0025 1091
051fe60d
GV		 1092#define PASSWD_FIELD_SIZE 256
1093
07f7980a
EZ		 1094static char dflt_passwd_name[PASSWD_FIELD_SIZE];
1095static char dflt_passwd_passwd[PASSWD_FIELD_SIZE];
1096static char dflt_passwd_gecos[PASSWD_FIELD_SIZE];
1097static char dflt_passwd_dir[PASSWD_FIELD_SIZE];
1098static char dflt_passwd_shell[PASSWD_FIELD_SIZE];
95ed0025 1099
07f7980a 1100static struct passwd dflt_passwd =
95ed0025 1101{
07f7980a
EZ		 1102 dflt_passwd_name,
1103 dflt_passwd_passwd,
95ed0025
RS		 1104 0,
1105 0,
1106 0,
07f7980a
EZ		 1107 dflt_passwd_gecos,
1108 dflt_passwd_dir,
1109 dflt_passwd_shell,
95ed0025
RS		 1110};
1111
07f7980a
EZ		 1112static char dflt_group_name[GNLEN+1];
1113
1114static struct group dflt_group =
3d19b645 1115{
07f7980a
EZ		 1116 /* When group information is not available, we return this as the
1117 group for all files. */
1118 dflt_group_name,
1119 0,
3d19b645
LH		 1120};
1121
22749e9a 1122unsigned
b56ceb92 1123getuid (void)
177c0ea7 1124{
07f7980a 1125 return dflt_passwd.pw_uid;
480b0c5b
GV		 1126}
1127
22749e9a 1128unsigned
b56ceb92 1129geteuid (void)
177c0ea7 1130{
480b0c5b
GV		 1131 /* I could imagine arguing for checking to see whether the user is
1132 in the Administrators group and returning a UID of 0 for that
1133 case, but I don't know how wise that would be in the long run. */
177c0ea7 1134 return getuid ();
480b0c5b
GV		 1135}
1136
22749e9a 1137unsigned
b56ceb92 1138getgid (void)
177c0ea7 1139{
07f7980a 1140 return dflt_passwd.pw_gid;
480b0c5b
GV		 1141}
1142
22749e9a 1143unsigned
b56ceb92 1144getegid (void)
177c0ea7 1145{
480b0c5b
GV		 1146 return getgid ();
1147}
1148
95ed0025 1149struct passwd *
22749e9a 1150getpwuid (unsigned uid)
95ed0025 1151{
07f7980a
EZ		 1152 if (uid == dflt_passwd.pw_uid)
1153 return &dflt_passwd;
480b0c5b 1154 return NULL;
95ed0025
RS		 1155}
1156
3d19b645
LH		 1157struct group *
1158getgrgid (gid_t gid)
1159{
07f7980a 1160 return &dflt_group;
3d19b645
LH		 1161}
1162
95ed0025
RS		 1163struct passwd *
1164getpwnam (char *name)
1165{
1166 struct passwd *pw;
177c0ea7 1167
95ed0025
RS		 1168 pw = getpwuid (getuid ());
1169 if (!pw)
1170 return pw;
1171
05131107 1172 if (xstrcasecmp (name, pw->pw_name))
95ed0025
RS		 1173 return NULL;
1174
1175 return pw;
1176}
1177
bedf4aab 1178static void
b56ceb92 1179init_user_info (void)
95ed0025 1180{
480b0c5b
GV		 1181 /* Find the user's real name by opening the process token and
1182 looking up the name associated with the user-sid in that token.
1183
1184 Use the relative portion of the identifier authority value from
1185 the user-sid as the user id value (same for group id using the
1186 primary group sid from the process token). */
1187
07f7980a 1188 char uname[UNLEN+1], gname[GNLEN+1], domain[1025];
32cef06e 1189 DWORD ulength = sizeof (uname), dlength = sizeof (domain), needed;
07f7980a 1190 DWORD glength = sizeof (gname);
10aabbf9
JB		 1191 HANDLE token = NULL;
1192 SID_NAME_USE user_type;
32cef06e
EZ		 1193 unsigned char *buf = NULL;
1194 DWORD blen = 0;
634d3003
EZ		 1195 TOKEN_USER user_token;
1196 TOKEN_PRIMARY_GROUP group_token;
32cef06e 1197 BOOL result;
10aabbf9 1198
32cef06e
EZ		 1199 result = open_process_token (GetCurrentProcess (), TOKEN_QUERY, &token);
1200 if (result)
1201 {
1202 result = get_token_information (token, TokenUser, NULL, 0, &blen);
1203 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
1204 {
1205 buf = xmalloc (blen);
1206 result = get_token_information (token, TokenUser,
1207 (LPVOID)buf, blen, &needed);
1208 if (result)
1209 {
1210 memcpy (&user_token, buf, sizeof (user_token));
1211 result = lookup_account_sid (NULL, user_token.User.Sid,
1212 uname, &ulength,
1213 domain, &dlength, &user_type);
1214 }
1215 }
1216 else
1217 result = FALSE;
1218 }
1219 if (result)
d1c1c3d2 1220 {
07f7980a 1221 strcpy (dflt_passwd.pw_name, uname);
c617afce 1222 /* Determine a reasonable uid value. */
05131107 1223 if (xstrcasecmp ("administrator", uname) == 0)
480b0c5b 1224 {
07f7980a
EZ		 1225 dflt_passwd.pw_uid = 500; /* well-known Administrator uid */
1226 dflt_passwd.pw_gid = 513; /* well-known None gid */
480b0c5b
GV		 1227 }
1228 else
1229 {
ce0ee994
EZ		 1230 /* Use the last sub-authority value of the RID, the relative
1231 portion of the SID, as user/group ID. */
8aaaec6b 1232 dflt_passwd.pw_uid = get_rid (user_token.User.Sid);
480b0c5b 1233
8aaaec6b 1234 /* Get group id and name. */
32cef06e
EZ		 1235 result = get_token_information (token, TokenPrimaryGroup,
1236 (LPVOID)buf, blen, &needed);
1237 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
1238 {
1239 buf = xrealloc (buf, blen = needed);
1240 result = get_token_information (token, TokenPrimaryGroup,
1241 (LPVOID)buf, blen, &needed);
1242 }
1243 if (result)
480b0c5b 1244 {
634d3003 1245 memcpy (&group_token, buf, sizeof (group_token));
8aaaec6b 1246 dflt_passwd.pw_gid = get_rid (group_token.PrimaryGroup);
07f7980a 1247 dlength = sizeof (domain);
32cef06e
EZ		 1248 /* If we can get at the real Primary Group name, use that.
1249 Otherwise, the default group name was already set to
1250 "None" in globals_of_w32. */
07f7980a
EZ		 1251 if (lookup_account_sid (NULL, group_token.PrimaryGroup,
1252 gname, &glength, NULL, &dlength,
1253 &user_type))
1254 strcpy (dflt_group_name, gname);
480b0c5b
GV		 1255 }
1256 else
07f7980a 1257 dflt_passwd.pw_gid = dflt_passwd.pw_uid;
480b0c5b
GV		 1258 }
1259 }
1260 /* If security calls are not supported (presumably because we
32cef06e 1261 are running under Windows 9X), fallback to this: */
07f7980a 1262 else if (GetUserName (uname, &ulength))
480b0c5b 1263 {
07f7980a 1264 strcpy (dflt_passwd.pw_name, uname);
05131107 1265 if (xstrcasecmp ("administrator", uname) == 0)
07f7980a 1266 dflt_passwd.pw_uid = 0;
480b0c5b 1267 else
07f7980a
EZ		 1268 dflt_passwd.pw_uid = 123;
1269 dflt_passwd.pw_gid = dflt_passwd.pw_uid;
480b0c5b
GV		 1270 }
1271 else
1272 {
07f7980a
EZ		 1273 strcpy (dflt_passwd.pw_name, "unknown");
1274 dflt_passwd.pw_uid = 123;
1275 dflt_passwd.pw_gid = 123;
d1c1c3d2 1276 }
07f7980a 1277 dflt_group.gr_gid = dflt_passwd.pw_gid;
95ed0025 1278
480b0c5b
GV		 1279 /* Ensure HOME and SHELL are defined. */
1280 if (getenv ("HOME") == NULL)
1088b922 1281 emacs_abort ();
480b0c5b 1282 if (getenv ("SHELL") == NULL)
1088b922 1283 emacs_abort ();
95ed0025 1284
480b0c5b 1285 /* Set dir and shell from environment variables. */
07f7980a
EZ		 1286 strcpy (dflt_passwd.pw_dir, getenv ("HOME"));
1287 strcpy (dflt_passwd.pw_shell, getenv ("SHELL"));
bd4a449f 1288
32cef06e 1289 xfree (buf);
480b0c5b
GV		 1290 if (token)
1291 CloseHandle (token);
95ed0025
RS		 1292}
1293
95ed0025 1294int
b56ceb92 1295random (void)
95ed0025 1296{
480b0c5b
GV		 1297 /* rand () on NT gives us 15 random bits...hack together 30 bits. */
1298 return ((rand () << 15) | rand ());
95ed0025
RS		 1299}
1300
95ed0025 1301void
480b0c5b 1302srandom (int seed)
95ed0025 1303{
480b0c5b 1304 srand (seed);
95ed0025
RS		 1305}
1306
76b3903d 1307
cbe39279
RS		 1308/* Normalize filename by converting all path separators to
1309 the specified separator. Also conditionally convert upper
1310 case path name components to lower case. */
1311
1312static void
b56ceb92 1313normalize_filename (register char *fp, char path_sep)
cbe39279
RS		 1314{
1315 char sep;
1316 char *elem;
1317
5162ffce
MB		 1318 /* Always lower-case drive letters a-z, even if the filesystem
1319 preserves case in filenames.
1320 This is so filenames can be compared by string comparison
1321 functions that are case-sensitive. Even case-preserving filesystems
1322 do not distinguish case in drive letters. */
1323 if (fp[1] == ':' && *fp >= 'A' && *fp <= 'Z')
1324 {
1325 *fp += 'a' - 'A';
1326 fp += 2;
1327 }
1328
fbd6baed 1329 if (NILP (Vw32_downcase_file_names))
cbe39279
RS		 1330 {
1331 while (*fp)
1332 {
1333 if (*fp == '/' || *fp == '\\')
1334 *fp = path_sep;
1335 fp++;
1336 }
1337 return;
1338 }
1339
1340 sep = path_sep; /* convert to this path separator */
1341 elem = fp; /* start of current path element */
1342
1343 do {
1344 if (*fp >= 'a' && *fp <= 'z')
1345 elem = 0; /* don't convert this element */
1346
1347 if (*fp == 0 || *fp == ':')
1348 {
1349 sep = *fp; /* restore current separator (or 0) */
1350 *fp = '/'; /* after conversion of this element */
1351 }
1352
1353 if (*fp == '/' || *fp == '\\')
1354 {
1355 if (elem && elem != fp)
1356 {
1357 *fp = 0; /* temporary end of string */
1358 _strlwr (elem); /* while we convert to lower case */
1359 }
1360 *fp = sep; /* convert (or restore) path separator */
1361 elem = fp + 1; /* next element starts after separator */
1362 sep = path_sep;
1363 }
1364 } while (*fp++);
1365}
1366
480b0c5b 1367/* Destructively turn backslashes into slashes. */
95ed0025 1368void
b56ceb92 1369dostounix_filename (register char *p)
95ed0025 1370{
cbe39279 1371 normalize_filename (p, '/');
95ed0025
RS		 1372}
1373
480b0c5b 1374/* Destructively turn slashes into backslashes. */
95ed0025 1375void
b56ceb92 1376unixtodos_filename (register char *p)
95ed0025 1377{
cbe39279 1378 normalize_filename (p, '\\');
95ed0025
RS		 1379}
1380
480b0c5b
GV		 1381/* Remove all CR's that are followed by a LF.
1382 (From msdos.c...probably should figure out a way to share it,
1383 although this code isn't going to ever change.) */
bedf4aab 1384static int
b56ceb92 1385crlf_to_lf (register int n, register unsigned char *buf)
35f0d482 1386{
480b0c5b
GV		 1387 unsigned char *np = buf;
1388 unsigned char *startp = buf;
1389 unsigned char *endp = buf + n;
35f0d482 1390
480b0c5b
GV		 1391 if (n == 0)
1392 return n;
1393 while (buf < endp - 1)
95ed0025 1394 {
480b0c5b
GV		 1395 if (*buf == 0x0d)
1396 {
1397 if (*(++buf) != 0x0a)
1398 *np++ = 0x0d;
1399 }
1400 else
1401 *np++ = *buf++;
95ed0025 1402 }
480b0c5b
GV		 1403 if (buf < endp)
1404 *np++ = *buf++;
1405 return np - startp;
95ed0025
RS		 1406}
1407
76b3903d
GV		 1408/* Parse the root part of file name, if present. Return length and
1409 optionally store pointer to char after root. */
1410static int
1411parse_root (char * name, char ** pPath)
1412{
1413 char * start = name;
1414
1415 if (name == NULL)
1416 return 0;
1417
1418 /* find the root name of the volume if given */
1419 if (isalpha (name[0]) && name[1] == ':')
1420 {
1421 /* skip past drive specifier */
1422 name += 2;
1423 if (IS_DIRECTORY_SEP (name[0]))
1424 name++;
1425 }
1426 else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1]))
1427 {
1428 int slashes = 2;
1429 name += 2;
1430 do
1431 {
1432 if (IS_DIRECTORY_SEP (*name) && --slashes == 0)
1433 break;
1434 name++;
1435 }
1436 while ( *name );
1437 if (IS_DIRECTORY_SEP (name[0]))
1438 name++;
1439 }
1440
1441 if (pPath)
1442 *pPath = name;
1443
1444 return name - start;
1445}
1446
1447/* Get long base name for name; name is assumed to be absolute. */
1448static int
1449get_long_basename (char * name, char * buf, int size)
1450{
1451 WIN32_FIND_DATA find_data;
1452 HANDLE dir_handle;
1453 int len = 0;
1454
9ab8560d 1455 /* must be valid filename, no wild cards or other invalid characters */
22189f79 1456 if (_mbspbrk (name, "*?|<>\""))
bb1584c8
RS		 1457 return 0;
1458
76b3903d
GV		 1459 dir_handle = FindFirstFile (name, &find_data);
1460 if (dir_handle != INVALID_HANDLE_VALUE)
1461 {
1462 if ((len = strlen (find_data.cFileName)) < size)
1463 memcpy (buf, find_data.cFileName, len + 1);
1464 else
1465 len = 0;
1466 FindClose (dir_handle);
1467 }
1468 return len;
1469}
1470
1471/* Get long name for file, if possible (assumed to be absolute). */
1472BOOL
1473w32_get_long_filename (char * name, char * buf, int size)
1474{
1475 char * o = buf;
1476 char * p;
1477 char * q;
1478 char full[ MAX_PATH ];
1479 int len;
1480
1481 len = strlen (name);
1482 if (len >= MAX_PATH)
1483 return FALSE;
1484
1485 /* Use local copy for destructive modification. */
1486 memcpy (full, name, len+1);
1487 unixtodos_filename (full);
1488
1489 /* Copy root part verbatim. */
1490 len = parse_root (full, &p);
1491 memcpy (o, full, len);
1492 o += len;
4f8ac0b2 1493 *o = '\0';
76b3903d
GV		 1494 size -= len;
1495
4f8ac0b2 1496 while (p != NULL && *p)
76b3903d
GV		 1497 {
1498 q = p;
1499 p = strchr (q, '\\');
1500 if (p) *p = '\0';
1501 len = get_long_basename (full, o, size);
1502 if (len > 0)
1503 {
1504 o += len;
1505 size -= len;
1506 if (p != NULL)
1507 {
1508 *p++ = '\\';
1509 if (size < 2)
1510 return FALSE;
1511 *o++ = '\\';
1512 size--;
1513 *o = '\0';
1514 }
1515 }
1516 else
1517 return FALSE;
1518 }
76b3903d
GV		 1519
1520 return TRUE;
1521}
1522
bedf4aab 1523static int
9d3355d1
GV		 1524is_unc_volume (const char *filename)
1525{
1526 const char *ptr = filename;
1527
1528 if (!IS_DIRECTORY_SEP (ptr[0]) || !IS_DIRECTORY_SEP (ptr[1]) || !ptr[2])
1529 return 0;
1530
22189f79 1531 if (_mbspbrk (ptr + 2, "*?|<>\"\\/"))
9d3355d1
GV		 1532 return 0;
1533
1534 return 1;
1535}
76b3903d 1536
480b0c5b 1537#define REG_ROOT "SOFTWARE\\GNU\\Emacs"
f332b293 1538
177c0ea7 1539LPBYTE
b56ceb92 1540w32_get_resource (char *key, LPDWORD lpdwtype)
f332b293
GV		 1541{
1542 LPBYTE lpvalue;
1543 HKEY hrootkey = NULL;
1544 DWORD cbData;
177c0ea7
JB		 1545
1546 /* Check both the current user and the local machine to see if
f332b293 1547 we have any resources. */
177c0ea7 1548
f332b293
GV		 1549 if (RegOpenKeyEx (HKEY_CURRENT_USER, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS)
1550 {
1551 lpvalue = NULL;
1552
177c0ea7 1553 if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS
23f86fce 1554 && (lpvalue = xmalloc (cbData)) != NULL
f332b293
GV		 1555 && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS)
1556 {
4da4d9bb 1557 RegCloseKey (hrootkey);
f332b293
GV		 1558 return (lpvalue);
1559 }
1560
70fdbb46 1561 xfree (lpvalue);
177c0ea7 1562
f332b293 1563 RegCloseKey (hrootkey);
177c0ea7
JB		 1564 }
1565
f332b293
GV		 1566 if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS)
1567 {
1568 lpvalue = NULL;
177c0ea7 1569
76b3903d 1570 if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS
23f86fce 1571 && (lpvalue = xmalloc (cbData)) != NULL
76b3903d 1572 && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS)
f332b293 1573 {
4da4d9bb 1574 RegCloseKey (hrootkey);
f332b293
GV		 1575 return (lpvalue);
1576 }
177c0ea7 1577
70fdbb46 1578 xfree (lpvalue);
177c0ea7 1579
f332b293 1580 RegCloseKey (hrootkey);
177c0ea7
JB		 1581 }
1582
f332b293
GV		 1583 return (NULL);
1584}
1585
75b08edb 1586char *get_emacs_configuration (void);
94eab1c8 1587
f332b293 1588void
aa7b87b0 1589init_environment (char ** argv)
f332b293 1590{
b3308d2e
KH		 1591 static const char * const tempdirs[] = {
1592 "$TMPDIR", "$TEMP", "$TMP", "c:/"
1593 };
2d5324c5 1594
b3308d2e 1595 int i;
2d5324c5 1596
b3308d2e
KH		 1597 const int imax = sizeof (tempdirs) / sizeof (tempdirs[0]);
1598
1599 /* Make sure they have a usable $TMPDIR. Many Emacs functions use
1600 temporary files and assume "/tmp" if $TMPDIR is unset, which
1601 will break on DOS/Windows. Refuse to work if we cannot find
1602 a directory, not even "c:/", usable for that purpose. */
1603 for (i = 0; i < imax ; i++)
1604 {
1605 const char *tmp = tempdirs[i];
1606
1607 if (*tmp == '$')
1608 tmp = getenv (tmp + 1);
1609 /* Note that `access' can lie to us if the directory resides on a
1610 read-only filesystem, like CD-ROM or a write-protected floppy.
1611 The only way to be really sure is to actually create a file and
1612 see if it succeeds. But I think that's too much to ask. */
6dad7178
EZ		 1613
1614 /* MSVCRT's _access crashes with D_OK. */
a6fc3b5c 1615 if (tmp && sys_access (tmp, D_OK) == 0)
b3308d2e
KH		 1616 {
1617 char * var = alloca (strlen (tmp) + 8);
1618 sprintf (var, "TMPDIR=%s", tmp);
aca583b2 1619 _putenv (strdup (var));
b3308d2e
KH		 1620 break;
1621 }
1622 }
1623 if (i >= imax)
1624 cmd_error_internal
1625 (Fcons (Qerror,
1626 Fcons (build_string ("no usable temporary directories found!!"),
1627 Qnil)),
1628 "While setting TMPDIR: ");
1629
ca149beb
AI		 1630 /* Check for environment variables and use registry settings if they
1631 don't exist. Fallback on default values where applicable. */
f332b293 1632 {
480b0c5b
GV		 1633 int i;
1634 LPBYTE lpval;
1635 DWORD dwType;
69fb0241 1636 char locale_name[32];
2d5324c5 1637 char default_home[MAX_PATH];
fdc5744d 1638 int appdata = 0;
f332b293 1639
e00b99c8 1640 static const struct env_entry
ca149beb
AI		 1641 {
1642 char * name;
1643 char * def_value;
e00b99c8 1644 } dflt_envvars[] =
ca149beb 1645 {
76151e2c
EZ		 1646 /* If the default value is NULL, we will use the value from the
1647 outside environment or the Registry, but will not push the
1648 variable into the Emacs environment if it is defined neither
1649 in the Registry nor in the outside environment. */
ca149beb
AI		 1650 {"HOME", "C:/"},
1651 {"PRELOAD_WINSOCK", NULL},
1652 {"emacs_dir", "C:/emacs"},
76151e2c 1653 {"EMACSLOADPATH", NULL},
ca149beb 1654 {"SHELL", "%emacs_dir%/bin/cmdproxy.exe"},
76151e2c
EZ		 1655 {"EMACSDATA", NULL},
1656 {"EMACSPATH", NULL},
1657 {"INFOPATH", NULL},
1658 {"EMACSDOC", NULL},
69fb0241
JR		 1659 {"TERM", "cmd"},
1660 {"LANG", NULL},
480b0c5b
GV		 1661 };
1662
ed3751c8 1663#define N_ENV_VARS sizeof (dflt_envvars)/sizeof (dflt_envvars[0])
e00b99c8
EZ		 1664
1665 /* We need to copy dflt_envvars[] and work on the copy because we
1666 don't want the dumped Emacs to inherit the values of
1667 environment variables we saw during dumping (which could be on
1668 a different system). The defaults above must be left intact. */
1669 struct env_entry env_vars[N_ENV_VARS];
1670
1671 for (i = 0; i < N_ENV_VARS; i++)
1672 env_vars[i] = dflt_envvars[i];
1673
2d5324c5
JR		 1674 /* For backwards compatibility, check if a .emacs file exists in C:/
1675 If not, then we can try to default to the appdata directory under the
1676 user's profile, which is more likely to be writable. */
99b1553e 1677 if (!check_existing ("C:/.emacs"))
94eab1c8
JB		 1678 {
1679 HRESULT profile_result;
1680 /* Dynamically load ShGetFolderPath, as it won't exist on versions
1681 of Windows 95 and NT4 that have not been updated to include
1682 MSIE 5. */
1683 ShGetFolderPath_fn get_folder_path;
1684 get_folder_path = (ShGetFolderPath_fn)
1685 GetProcAddress (GetModuleHandle ("shell32.dll"), "SHGetFolderPathA");
1686
1687 if (get_folder_path != NULL)
1688 {
1689 profile_result = get_folder_path (NULL, CSIDL_APPDATA, NULL,
1690 0, default_home);
2d5324c5 1691
94eab1c8
JB		 1692 /* If we can't get the appdata dir, revert to old behavior. */
1693 if (profile_result == S_OK)
fdc5744d
JB		 1694 {
1695 env_vars[0].def_value = default_home;
1696 appdata = 1;
1697 }
94eab1c8
JB		 1698 }
1699 }
2d5324c5 1700
69fb0241
JR		 1701 /* Get default locale info and use it for LANG. */
1702 if (GetLocaleInfo (LOCALE_USER_DEFAULT,
1703 LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP,
1704 locale_name, sizeof (locale_name)))
1705 {
e00b99c8 1706 for (i = 0; i < N_ENV_VARS; i++)
69fb0241
JR		 1707 {
1708 if (strcmp (env_vars[i].name, "LANG") == 0)
1709 {
1710 env_vars[i].def_value = locale_name;
1711 break;
1712 }
1713 }
1714 }
1715
ca149beb
AI		 1716#define SET_ENV_BUF_SIZE (4 * MAX_PATH) /* to cover EMACSLOADPATH */
1717
1718 /* Treat emacs_dir specially: set it unconditionally based on our
76151e2c 1719 location. */
ca149beb
AI		 1720 {
1721 char *p;
1722 char modname[MAX_PATH];
1723
1724 if (!GetModuleFileName (NULL, modname, MAX_PATH))
1088b922 1725 emacs_abort ();
ca149beb 1726 if ((p = strrchr (modname, '\\')) == NULL)
1088b922 1727 emacs_abort ();
ca149beb
AI		 1728 *p = 0;
1729
05131107 1730 if ((p = strrchr (modname, '\\')) && xstrcasecmp (p, "\\bin") == 0)
ca149beb
AI		 1731 {
1732 char buf[SET_ENV_BUF_SIZE];
1733
1734 *p = 0;
1735 for (p = modname; *p; p++)
1736 if (*p == '\\') *p = '/';
177c0ea7 1737
ed3751c8 1738 _snprintf (buf, sizeof (buf)-1, "emacs_dir=%s", modname);
a302c7ae 1739 _putenv (strdup (buf));
ca149beb 1740 }
950090be
JR		 1741 /* Handle running emacs from the build directory: src/oo-spd/i386/ */
1742
1743 /* FIXME: should use substring of get_emacs_configuration ().
1744 But I don't think the Windows build supports alpha, mips etc
1745 anymore, so have taken the easy option for now. */
62aba0d4
FP		 1746 else if (p && (xstrcasecmp (p, "\\i386") == 0
1747 || xstrcasecmp (p, "\\AMD64") == 0))
950090be
JR		 1748 {
1749 *p = 0;
1750 p = strrchr (modname, '\\');
1751 if (p != NULL)
1752 {
1753 *p = 0;
1754 p = strrchr (modname, '\\');
05131107 1755 if (p && xstrcasecmp (p, "\\src") == 0)
950090be
JR		 1756 {
1757 char buf[SET_ENV_BUF_SIZE];
1758
1759 *p = 0;
1760 for (p = modname; *p; p++)
1761 if (*p == '\\') *p = '/';
1762
ed3751c8 1763 _snprintf (buf, sizeof (buf)-1, "emacs_dir=%s", modname);
950090be
JR		 1764 _putenv (strdup (buf));
1765 }
1766 }
1767 }
ca149beb
AI		 1768 }
1769
e00b99c8 1770 for (i = 0; i < N_ENV_VARS; i++)
f332b293 1771 {
ca149beb 1772 if (!getenv (env_vars[i].name))
480b0c5b 1773 {
ca149beb 1774 int dont_free = 0;
480b0c5b 1775
aa5ee2a3
JB		 1776 if ((lpval = w32_get_resource (env_vars[i].name, &dwType)) == NULL
1777 /* Also ignore empty environment variables. */
1778 || *lpval == 0)
ca149beb 1779 {
70fdbb46 1780 xfree (lpval);
ca149beb
AI		 1781 lpval = env_vars[i].def_value;
1782 dwType = REG_EXPAND_SZ;
1783 dont_free = 1;
fdc5744d 1784 if (!strcmp (env_vars[i].name, "HOME") && !appdata)
3438fe21
EZ		 1785 Vdelayed_warnings_list
1786 = Fcons (listn (CONSTYPE_HEAP, 2,
073c88c2 1787 intern ("initialization"),
694b6c97 1788 build_string ("Setting HOME to C:\\ by default is deprecated")),
073c88c2 1789 Vdelayed_warnings_list);
480b0c5b 1790 }
ca149beb
AI		 1791
1792 if (lpval)
480b0c5b 1793 {
892eb237 1794 char buf1[SET_ENV_BUF_SIZE], buf2[SET_ENV_BUF_SIZE];
ca149beb 1795
892eb237 1796 if (dwType == REG_EXPAND_SZ)
ed3751c8 1797 ExpandEnvironmentStrings ((LPSTR) lpval, buf1, sizeof (buf1));
ca149beb 1798 else if (dwType == REG_SZ)
892eb237
EZ		 1799 strcpy (buf1, lpval);
1800 if (dwType == REG_EXPAND_SZ || dwType == REG_SZ)
ca149beb 1801 {
ed3751c8 1802 _snprintf (buf2, sizeof (buf2)-1, "%s=%s", env_vars[i].name,
892eb237
EZ		 1803 buf1);
1804 _putenv (strdup (buf2));
ca149beb 1805 }
f332b293 1806
ca149beb
AI		 1807 if (!dont_free)
1808 xfree (lpval);
1809 }
480b0c5b
GV		 1810 }
1811 }
1812 }
1813
75b08edb
GV		 1814 /* Rebuild system configuration to reflect invoking system. */
1815 Vsystem_configuration = build_string (EMACS_CONFIGURATION);
1816
76b3903d
GV		 1817 /* Another special case: on NT, the PATH variable is actually named
1818 "Path" although cmd.exe (perhaps NT itself) arranges for
1819 environment variable lookup and setting to be case insensitive.
1820 However, Emacs assumes a fully case sensitive environment, so we
1821 need to change "Path" to "PATH" to match the expectations of
1822 various elisp packages. We do this by the sneaky method of
1823 modifying the string in the C runtime environ entry.
1824
1825 The same applies to COMSPEC. */
1826 {
1827 char ** envp;
1828
1829 for (envp = environ; *envp; envp++)
1830 if (_strnicmp (*envp, "PATH=", 5) == 0)
1831 memcpy (*envp, "PATH=", 5);
1832 else if (_strnicmp (*envp, "COMSPEC=", 8) == 0)
1833 memcpy (*envp, "COMSPEC=", 8);
1834 }
1835
8d38f461 1836 /* Remember the initial working directory for getwd. */
6dad7178
EZ		 1837 /* FIXME: Do we need to resolve possible symlinks in startup_dir?
1838 Does it matter anywhere in Emacs? */
76b3903d 1839 if (!GetCurrentDirectory (MAXPATHLEN, startup_dir))
1088b922 1840 emacs_abort ();
76b3903d
GV		 1841
1842 {
aa7b87b0 1843 static char modname[MAX_PATH];
76b3903d
GV		 1844
1845 if (!GetModuleFileName (NULL, modname, MAX_PATH))
1088b922 1846 emacs_abort ();
aa7b87b0 1847 argv[0] = modname;
76b3903d
GV		 1848 }
1849
20af4831
JR		 1850 /* Determine if there is a middle mouse button, to allow parse_button
1851 to decide whether right mouse events should be mouse-2 or
1852 mouse-3. */
e0c181dd 1853 w32_num_mouse_buttons = GetSystemMetrics (SM_CMOUSEBUTTONS);
20af4831 1854
480b0c5b
GV		 1855 init_user_info ();
1856}
1857
6dad7178
EZ		 1858/* Called from expand-file-name when default-directory is not a string. */
1859
bf794306
EZ		 1860char *
1861emacs_root_dir (void)
1862{
1863 static char root_dir[FILENAME_MAX];
1864 const char *p;
1865
1866 p = getenv ("emacs_dir");
1867 if (p == NULL)
1088b922 1868 emacs_abort ();
bf794306
EZ		 1869 strcpy (root_dir, p);
1870 root_dir[parse_root (root_dir, NULL)] = '\0';
1871 dostounix_filename (root_dir);
1872 return root_dir;
1873}
1874
480b0c5b
GV		 1875/* We don't have scripts to automatically determine the system configuration
1876 for Emacs before it's compiled, and we don't want to have to make the
1877 user enter it, so we define EMACS_CONFIGURATION to invoke this runtime
1878 routine. */
1879
480b0c5b
GV		 1880char *
1881get_emacs_configuration (void)
1882{
1883 char *arch, *oem, *os;
c5247da2 1884 int build_num;
a302c7ae 1885 static char configuration_buffer[32];
480b0c5b
GV		 1886
1887 /* Determine the processor type. */
177c0ea7 1888 switch (get_processor_type ())
480b0c5b
GV		 1889 {
1890
1891#ifdef PROCESSOR_INTEL_386
1892 case PROCESSOR_INTEL_386:
1893 case PROCESSOR_INTEL_486:
1894 case PROCESSOR_INTEL_PENTIUM:
62aba0d4
FP		 1895#ifdef _WIN64
1896 arch = "amd64";
1897#else
480b0c5b 1898 arch = "i386";
62aba0d4
FP		 1899#endif
1900 break;
1901#endif
1902#ifdef PROCESSOR_AMD_X8664
1903 case PROCESSOR_AMD_X8664:
1904 arch = "amd64";
480b0c5b
GV		 1905 break;
1906#endif
1907
480b0c5b
GV		 1908#ifdef PROCESSOR_MIPS_R2000
1909 case PROCESSOR_MIPS_R2000:
1910 case PROCESSOR_MIPS_R3000:
1911 case PROCESSOR_MIPS_R4000:
1912 arch = "mips";
1913 break;
1914#endif
1915
1916#ifdef PROCESSOR_ALPHA_21064
1917 case PROCESSOR_ALPHA_21064:
1918 arch = "alpha";
1919 break;
1920#endif
1921
1922 default:
1923 arch = "unknown";
1924 break;
f332b293 1925 }
480b0c5b 1926
a302c7ae
AI		 1927 /* Use the OEM field to reflect the compiler/library combination. */
1928#ifdef _MSC_VER
1929#define COMPILER_NAME "msvc"
1930#else
1931#ifdef __GNUC__
1932#define COMPILER_NAME "mingw"
1933#else
1934#define COMPILER_NAME "unknown"
1935#endif
1936#endif
1937 oem = COMPILER_NAME;
480b0c5b 1938
c5247da2
GV		 1939 switch (osinfo_cache.dwPlatformId) {
1940 case VER_PLATFORM_WIN32_NT:
1941 os = "nt";
1942 build_num = osinfo_cache.dwBuildNumber;
1943 break;
1944 case VER_PLATFORM_WIN32_WINDOWS:
1945 if (osinfo_cache.dwMinorVersion == 0) {
1946 os = "windows95";
1947 } else {
1948 os = "windows98";
1949 }
1950 build_num = LOWORD (osinfo_cache.dwBuildNumber);
1951 break;
1952 case VER_PLATFORM_WIN32s:
1953 /* Not supported, should not happen. */
1954 os = "windows32s";
1955 build_num = LOWORD (osinfo_cache.dwBuildNumber);
1956 break;
1957 default:
1958 os = "unknown";
1959 build_num = 0;
1960 break;
1961 }
1962
1963 if (osinfo_cache.dwPlatformId == VER_PLATFORM_WIN32_NT) {
1964 sprintf (configuration_buffer, "%s-%s-%s%d.%d.%d", arch, oem, os,
1965 get_w32_major_version (), get_w32_minor_version (), build_num);
1966 } else {
1967 sprintf (configuration_buffer, "%s-%s-%s.%d", arch, oem, os, build_num);
1968 }
480b0c5b 1969
480b0c5b 1970 return configuration_buffer;
f332b293
GV		 1971}
1972
a302c7ae
AI		 1973char *
1974get_emacs_configuration_options (void)
1975{
38c54d9d
JB		 1976 static char *options_buffer;
1977 char cv[32]; /* Enough for COMPILER_VERSION. */
1978 char *options[] = {
1979 cv, /* To be filled later. */
1980#ifdef EMACSDEBUG
1981 " --no-opt",
d7f29f8e
EZ		 1982#endif
1983#ifdef ENABLE_CHECKING
1984 " --enable-checking",
38c54d9d
JB		 1985#endif
1986 /* configure.bat already sets USER_CFLAGS and USER_LDFLAGS
1987 with a starting space to save work here. */
1988#ifdef USER_CFLAGS
1989 " --cflags", USER_CFLAGS,
1990#endif
1991#ifdef USER_LDFLAGS
1992 " --ldflags", USER_LDFLAGS,
1993#endif
1994 NULL
1995 };
1996 size_t size = 0;
1997 int i;
a302c7ae
AI		 1998
1999/* Work out the effective configure options for this build. */
2000#ifdef _MSC_VER
2001#define COMPILER_VERSION "--with-msvc (%d.%02d)", _MSC_VER / 100, _MSC_VER % 100
2002#else
2003#ifdef __GNUC__
2004#define COMPILER_VERSION "--with-gcc (%d.%d)", __GNUC__, __GNUC_MINOR__
2005#else
2006#define COMPILER_VERSION ""
2007#endif
2008#endif
2009
83e245c4 2010 if (_snprintf (cv, sizeof (cv) - 1, COMPILER_VERSION) < 0)
38c54d9d 2011 return "Error: not enough space for compiler version";
83e245c4 2012 cv[sizeof (cv) - 1] = '\0';
38c54d9d
JB		 2013
2014 for (i = 0; options[i]; i++)
2015 size += strlen (options[i]);
2016
2017 options_buffer = xmalloc (size + 1);
fc33e153 2018 options_buffer[0] = '\0';
38c54d9d
JB		 2019
2020 for (i = 0; options[i]; i++)
2021 strcat (options_buffer, options[i]);
2022
a302c7ae
AI		 2023 return options_buffer;
2024}
2025
2026
35f0d482
KH		 2027#include <sys/timeb.h>
2028
2029/* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */
177c0ea7 2030void
35f0d482
KH		 2031gettimeofday (struct timeval *tv, struct timezone *tz)
2032{
6e602566 2033 struct _timeb tb;
35f0d482
KH		 2034 _ftime (&tb);
2035
2036 tv->tv_sec = tb.time;
2037 tv->tv_usec = tb.millitm * 1000L;
97a93095
EZ		 2038 /* Implementation note: _ftime sometimes doesn't update the dstflag
2039 according to the new timezone when the system timezone is
2040 changed. We could fix that by using GetSystemTime and
2041 GetTimeZoneInformation, but that doesn't seem necessary, since
2042 Emacs always calls gettimeofday with the 2nd argument NULL (see
e9a9ae03 2043 current_emacs_time). */
177c0ea7 2044 if (tz)
35f0d482
KH		 2045 {
2046 tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */
2047 tz->tz_dsttime = tb.dstflag; /* type of dst correction */
2048 }
2049}
35f0d482 2050
388cdec0
EZ		 2051/* Emulate fdutimens. */
2052
2053/* Set the access and modification time stamps of FD (a.k.a. FILE) to be
2054 TIMESPEC[0] and TIMESPEC[1], respectively.
2055 FD must be either negative -- in which case it is ignored --
2056 or a file descriptor that is open on FILE.
2057 If FD is nonnegative, then FILE can be NULL, which means
2058 use just futimes instead of utimes.
2059 If TIMESPEC is null, FAIL.
2060 Return 0 on success, -1 (setting errno) on failure. */
2061
2062int
2063fdutimens (int fd, char const *file, struct timespec const timespec[2])
2064{
2065 struct _utimbuf ut;
2066
2067 if (!timespec)
2068 {
2069 errno = ENOSYS;
2070 return -1;
2071 }
2072 if (fd < 0 && !file)
2073 {
2074 errno = EBADF;
2075 return -1;
2076 }
2077 ut.actime = timespec[0].tv_sec;
2078 ut.modtime = timespec[1].tv_sec;
2079 if (fd >= 0)
2080 return _futime (fd, &ut);
2081 else
2082 return _utime (file, &ut);
2083}
2084
2085
480b0c5b 2086/* ------------------------------------------------------------------------- */
b46a6a83 2087/* IO support and wrapper functions for the Windows API. */
480b0c5b 2088/* ------------------------------------------------------------------------- */
95ed0025 2089
480b0c5b 2090/* Place a wrapper around the MSVC version of ctime. It returns NULL
177c0ea7 2091 on network directories, so we handle that case here.
480b0c5b
GV		 2092 (Ulrich Leodolter, 1/11/95). */
2093char *
2094sys_ctime (const time_t *t)
2095{
2096 char *str = (char *) ctime (t);
2097 return (str ? str : "Sun Jan 01 00:00:00 1970");
2098}
2099
2100/* Emulate sleep...we could have done this with a define, but that
2101 would necessitate including windows.h in the files that used it.
2102 This is much easier. */
2103void
2104sys_sleep (int seconds)
2105{
2106 Sleep (seconds * 1000);
2107}
2108
76b3903d 2109/* Internal MSVC functions for low-level descriptor munging */
480b0c5b
GV		 2110extern int __cdecl _set_osfhnd (int fd, long h);
2111extern int __cdecl _free_osfhnd (int fd);
2112
2113/* parallel array of private info on file handles */
2114filedesc fd_info [ MAXDESC ];
2115
76b3903d
GV		 2116typedef struct volume_info_data {
2117 struct volume_info_data * next;
2118
2119 /* time when info was obtained */
2120 DWORD timestamp;
2121
2122 /* actual volume info */
2123 char * root_dir;
480b0c5b
GV		 2124 DWORD serialnum;
2125 DWORD maxcomp;
2126 DWORD flags;
76b3903d
GV		 2127 char * name;
2128 char * type;
2129} volume_info_data;
2130
2131/* Global referenced by various functions. */
2132static volume_info_data volume_info;
2133
2134/* Vector to indicate which drives are local and fixed (for which cached
2135 data never expires). */
2136static BOOL fixed_drives[26];
2137
2138/* Consider cached volume information to be stale if older than 10s,
2139 at least for non-local drives. Info for fixed drives is never stale. */
2140#define DRIVE_INDEX( c ) ( (c) <= 'Z' ? (c) - 'A' : (c) - 'a' )
2141#define VOLINFO_STILL_VALID( root_dir, info ) \
2142 ( ( isalpha (root_dir[0]) && \
2143 fixed_drives[ DRIVE_INDEX (root_dir[0]) ] ) \
2144 || GetTickCount () - info->timestamp < 10000 )
2145
2146/* Cache support functions. */
2147
2148/* Simple linked list with linear search is sufficient. */
2149static volume_info_data *volume_cache = NULL;
2150
2151static volume_info_data *
2152lookup_volume_info (char * root_dir)
2153{
2154 volume_info_data * info;
2155
2156 for (info = volume_cache; info; info = info->next)
05131107 2157 if (xstrcasecmp (info->root_dir, root_dir) == 0)
76b3903d
GV		 2158 break;
2159 return info;
2160}
2161
2162static void
2163add_volume_info (char * root_dir, volume_info_data * info)
2164{
a302c7ae 2165 info->root_dir = xstrdup (root_dir);
76b3903d
GV		 2166 info->next = volume_cache;
2167 volume_cache = info;
2168}
2169
2170
2171/* Wrapper for GetVolumeInformation, which uses caching to avoid
2172 performance penalty (~2ms on 486 for local drives, 7.5ms for local
2173 cdrom drive, ~5-10ms or more for remote drives on LAN). */
bedf4aab 2174static volume_info_data *
76b3903d
GV		 2175GetCachedVolumeInformation (char * root_dir)
2176{
2177 volume_info_data * info;
2178 char default_root[ MAX_PATH ];
2179
2180 /* NULL for root_dir means use root from current directory. */
2181 if (root_dir == NULL)
2182 {
2183 if (GetCurrentDirectory (MAX_PATH, default_root) == 0)
2184 return NULL;
2185 parse_root (default_root, &root_dir);
2186 *root_dir = 0;
2187 root_dir = default_root;
2188 }
2189
2190 /* Local fixed drives can be cached permanently. Removable drives
2191 cannot be cached permanently, since the volume name and serial
2192 number (if nothing else) can change. Remote drives should be
2193 treated as if they are removable, since there is no sure way to
2194 tell whether they are or not. Also, the UNC association of drive
2195 letters mapped to remote volumes can be changed at any time (even
2196 by other processes) without notice.
177c0ea7 2197
76b3903d
GV		 2198 As a compromise, so we can benefit from caching info for remote
2199 volumes, we use a simple expiry mechanism to invalidate cache
2200 entries that are more than ten seconds old. */
2201
2202#if 0
2203 /* No point doing this, because WNetGetConnection is even slower than
2204 GetVolumeInformation, consistently taking ~50ms on a 486 (FWIW,
2205 GetDriveType is about the only call of this type which does not
2206 involve network access, and so is extremely quick). */
2207
2208 /* Map drive letter to UNC if remote. */
ed3751c8 2209 if (isalpha (root_dir[0]) && !fixed[DRIVE_INDEX (root_dir[0])])
76b3903d
GV		 2210 {
2211 char remote_name[ 256 ];
2212 char drive[3] = { root_dir[0], ':' };
2213
2214 if (WNetGetConnection (drive, remote_name, sizeof (remote_name))
2215 == NO_ERROR)
2216 /* do something */ ;
2217 }
2218#endif
2219
2220 info = lookup_volume_info (root_dir);
2221
2222 if (info == NULL || ! VOLINFO_STILL_VALID (root_dir, info))
94eab1c8
JB		 2223 {
2224 char name[ 256 ];
2225 DWORD serialnum;
2226 DWORD maxcomp;
2227 DWORD flags;
2228 char type[ 256 ];
2229
2230 /* Info is not cached, or is stale. */
2231 if (!GetVolumeInformation (root_dir,
2232 name, sizeof (name),
2233 &serialnum,
2234 &maxcomp,
2235 &flags,
2236 type, sizeof (type)))
2237 return NULL;
76b3903d 2238
94eab1c8
JB		 2239 /* Cache the volume information for future use, overwriting existing
2240 entry if present. */
2241 if (info == NULL)
2242 {
23f86fce 2243 info = xmalloc (sizeof (volume_info_data));
94eab1c8
JB		 2244 add_volume_info (root_dir, info);
2245 }
2246 else
2247 {
2248 xfree (info->name);
2249 xfree (info->type);
2250 }
2251
2252 info->name = xstrdup (name);
2253 info->serialnum = serialnum;
2254 info->maxcomp = maxcomp;
2255 info->flags = flags;
2256 info->type = xstrdup (type);
2257 info->timestamp = GetTickCount ();
2258 }
76b3903d
GV		 2259
2260 return info;
2261}
480b0c5b 2262
6dad7178
EZ		 2263/* Get information on the volume where NAME is held; set path pointer to
2264 start of pathname in NAME (past UNC header\volume header if present),
2265 if pPath is non-NULL.
2266
2267 Note: if NAME includes symlinks, the information is for the volume
2268 of the symlink, not of its target. That's because, even though
2269 GetVolumeInformation returns information about the symlink target
2270 of its argument, we only pass the root directory to
2271 GetVolumeInformation, not the full NAME. */
bedf4aab 2272static int
480b0c5b 2273get_volume_info (const char * name, const char ** pPath)
95ed0025 2274{
480b0c5b
GV		 2275 char temp[MAX_PATH];
2276 char *rootname = NULL; /* default to current volume */
76b3903d 2277 volume_info_data * info;
480b0c5b
GV		 2278
2279 if (name == NULL)
2280 return FALSE;
2281
6dad7178 2282 /* Find the root name of the volume if given. */
480b0c5b
GV		 2283 if (isalpha (name[0]) && name[1] == ':')
2284 {
2285 rootname = temp;
2286 temp[0] = *name++;
2287 temp[1] = *name++;
2288 temp[2] = '\\';
2289 temp[3] = 0;
2290 }
2291 else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1]))
95ed0025 2292 {
480b0c5b
GV		 2293 char *str = temp;
2294 int slashes = 4;
2295 rootname = temp;
2296 do
2297 {
2298 if (IS_DIRECTORY_SEP (*name) && --slashes == 0)
2299 break;
2300 *str++ = *name++;
2301 }
2302 while ( *name );
2303
480b0c5b
GV		 2304 *str++ = '\\';
2305 *str = 0;
95ed0025 2306 }
480b0c5b
GV		 2307
2308 if (pPath)
2309 *pPath = name;
177c0ea7 2310
76b3903d
GV		 2311 info = GetCachedVolumeInformation (rootname);
2312 if (info != NULL)
95ed0025 2313 {
76b3903d
GV		 2314 /* Set global referenced by other functions. */
2315 volume_info = *info;
480b0c5b 2316 return TRUE;
95ed0025 2317 }
480b0c5b
GV		 2318 return FALSE;
2319}
2320
2321/* Determine if volume is FAT format (ie. only supports short 8.3
6dad7178
EZ		 2322 names); also set path pointer to start of pathname in name, if
2323 pPath is non-NULL. */
bedf4aab 2324static int
480b0c5b
GV		 2325is_fat_volume (const char * name, const char ** pPath)
2326{
2327 if (get_volume_info (name, pPath))
2328 return (volume_info.maxcomp == 12);
2329 return FALSE;
2330}
2331
6dad7178
EZ		 2332/* Map filename to a valid 8.3 name if necessary.
2333 The result is a pointer to a static buffer, so CAVEAT EMPTOR! */
480b0c5b 2334const char *
fbd6baed 2335map_w32_filename (const char * name, const char ** pPath)
480b0c5b
GV		 2336{
2337 static char shortname[MAX_PATH];
2338 char * str = shortname;
2339 char c;
480b0c5b 2340 char * path;
76b3903d 2341 const char * save_name = name;
480b0c5b 2342
ca149beb
AI		 2343 if (strlen (name) >= MAX_PATH)
2344 {
2345 /* Return a filename which will cause callers to fail. */
2346 strcpy (shortname, "?");
2347 return shortname;
2348 }
2349
a302c7ae 2350 if (is_fat_volume (name, (const char **)&path)) /* truncate to 8.3 */
95ed0025 2351 {
480b0c5b
GV		 2352 register int left = 8; /* maximum number of chars in part */
2353 register int extn = 0; /* extension added? */
2354 register int dots = 2; /* maximum number of dots allowed */
2355
2356 while (name < path)
2357 *str++ = *name++; /* skip past UNC header */
2358
2359 while ((c = *name++))
2360 {
2361 switch ( c )
2362 {
6dad7178 2363 case ':':
480b0c5b
GV		 2364 case '\\':
2365 case '/':
6dad7178 2366 *str++ = (c == ':' ? ':' : '\\');
480b0c5b
GV		 2367 extn = 0; /* reset extension flags */
2368 dots = 2; /* max 2 dots */
2369 left = 8; /* max length 8 for main part */
2370 break;
2371 case '.':
2372 if ( dots )
2373 {
2374 /* Convert path components of the form .xxx to _xxx,
2375 but leave . and .. as they are. This allows .emacs
2376 to be read as _emacs, for example. */
2377
2378 if (! *name ||
2379 *name == '.' ||
2380 IS_DIRECTORY_SEP (*name))
2381 {
2382 *str++ = '.';
2383 dots--;
2384 }
2385 else
2386 {
2387 *str++ = '_';
2388 left--;
2389 dots = 0;
2390 }
2391 }
2392 else if ( !extn )
2393 {
2394 *str++ = '.';
2395 extn = 1; /* we've got an extension */
2396 left = 3; /* 3 chars in extension */
2397 }
2398 else
2399 {
2400 /* any embedded dots after the first are converted to _ */
2401 *str++ = '_';
2402 }
2403 break;
2404 case '~':
2405 case '#': /* don't lose these, they're important */
2406 if ( ! left )
2407 str[-1] = c; /* replace last character of part */
2408 /* FALLTHRU */
2409 default:
2410 if ( left )
2411 {
2412 *str++ = tolower (c); /* map to lower case (looks nicer) */
2413 left--;
2414 dots = 0; /* started a path component */
2415 }
2416 break;
2417 }
2418 }
2419 *str = '\0';
fc85cb29
RS		 2420 }
2421 else
2422 {
2423 strcpy (shortname, name);
2424 unixtodos_filename (shortname);
95ed0025 2425 }
480b0c5b
GV		 2426
2427 if (pPath)
76b3903d 2428 *pPath = shortname + (path - save_name);
480b0c5b 2429
fc85cb29 2430 return shortname;
480b0c5b
GV		 2431}
2432
b3308d2e
KH		 2433static int
2434is_exec (const char * name)
2435{
2436 char * p = strrchr (name, '.');
2437 return
2438 (p != NULL
05131107
JR		 2439 && (xstrcasecmp (p, ".exe") == 0 ||
2440 xstrcasecmp (p, ".com") == 0 ||
2441 xstrcasecmp (p, ".bat") == 0 ||
2442 xstrcasecmp (p, ".cmd") == 0));
b3308d2e
KH		 2443}
2444
177c0ea7 2445/* Emulate the Unix directory procedures opendir, closedir,
76b3903d
GV		 2446 and readdir. We can't use the procedures supplied in sysdep.c,
2447 so we provide them here. */
2448
2449struct direct dir_static; /* simulated directory contents */
2450static HANDLE dir_find_handle = INVALID_HANDLE_VALUE;
2451static int dir_is_fat;
2452static char dir_pathname[MAXPATHLEN+1];
2453static WIN32_FIND_DATA dir_find_data;
2454
9d3355d1
GV		 2455/* Support shares on a network resource as subdirectories of a read-only
2456 root directory. */
2457static HANDLE wnet_enum_handle = INVALID_HANDLE_VALUE;
bedf4aab
JB		 2458static HANDLE open_unc_volume (const char *);
2459static char *read_unc_volume (HANDLE, char *, int);
2460static void close_unc_volume (HANDLE);
9d3355d1 2461
76b3903d
GV		 2462DIR *
2463opendir (char *filename)
2464{
2465 DIR *dirp;
2466
2467 /* Opening is done by FindFirstFile. However, a read is inherent to
2468 this operation, so we defer the open until read time. */
2469
76b3903d
GV		 2470 if (dir_find_handle != INVALID_HANDLE_VALUE)
2471 return NULL;
9d3355d1
GV		 2472 if (wnet_enum_handle != INVALID_HANDLE_VALUE)
2473 return NULL;
2474
6dad7178
EZ		 2475 /* Note: We don't support traversal of UNC volumes via symlinks.
2476 Doing so would mean punishing 99.99% of use cases by resolving
2477 all the possible symlinks in FILENAME, recursively. */
9d3355d1
GV		 2478 if (is_unc_volume (filename))
2479 {
2480 wnet_enum_handle = open_unc_volume (filename);
2481 if (wnet_enum_handle == INVALID_HANDLE_VALUE)
2482 return NULL;
2483 }
2484
2485 if (!(dirp = (DIR *) malloc (sizeof (DIR))))
2486 return NULL;
76b3903d
GV		 2487
2488 dirp->dd_fd = 0;
2489 dirp->dd_loc = 0;
2490 dirp->dd_size = 0;
2491
2492 strncpy (dir_pathname, map_w32_filename (filename, NULL), MAXPATHLEN);
2493 dir_pathname[MAXPATHLEN] = '\0';
6dad7178
EZ		 2494 /* Note: We don't support symlinks to file names on FAT volumes.
2495 Doing so would mean punishing 99.99% of use cases by resolving
2496 all the possible symlinks in FILENAME, recursively. */
76b3903d
GV		 2497 dir_is_fat = is_fat_volume (filename, NULL);
2498
2499 return dirp;
2500}
2501
2502void
2503closedir (DIR *dirp)
2504{
2505 /* If we have a find-handle open, close it. */
2506 if (dir_find_handle != INVALID_HANDLE_VALUE)
2507 {
2508 FindClose (dir_find_handle);
2509 dir_find_handle = INVALID_HANDLE_VALUE;
2510 }
9d3355d1
GV		 2511 else if (wnet_enum_handle != INVALID_HANDLE_VALUE)
2512 {
2513 close_unc_volume (wnet_enum_handle);
2514 wnet_enum_handle = INVALID_HANDLE_VALUE;
2515 }
76b3903d
GV		 2516 xfree ((char *) dirp);
2517}
2518
2519struct direct *
2520readdir (DIR *dirp)
2521{
b07103dc
EZ		 2522 int downcase = !NILP (Vw32_downcase_file_names);
2523
9d3355d1
GV		 2524 if (wnet_enum_handle != INVALID_HANDLE_VALUE)
2525 {
177c0ea7 2526 if (!read_unc_volume (wnet_enum_handle,
59eb0929
JB		 2527 dir_find_data.cFileName,
2528 MAX_PATH))
9d3355d1
GV		 2529 return NULL;
2530 }
76b3903d 2531 /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */
9d3355d1 2532 else if (dir_find_handle == INVALID_HANDLE_VALUE)
76b3903d
GV		 2533 {
2534 char filename[MAXNAMLEN + 3];
2535 int ln;
2536
2537 strcpy (filename, dir_pathname);
2538 ln = strlen (filename) - 1;
2539 if (!IS_DIRECTORY_SEP (filename[ln]))
2540 strcat (filename, "\\");
2541 strcat (filename, "*");
2542
6dad7178
EZ		 2543 /* Note: No need to resolve symlinks in FILENAME, because
2544 FindFirst opens the directory that is the target of a
2545 symlink. */
76b3903d
GV		 2546 dir_find_handle = FindFirstFile (filename, &dir_find_data);
2547
2548 if (dir_find_handle == INVALID_HANDLE_VALUE)
2549 return NULL;
2550 }
2551 else
2552 {
2553 if (!FindNextFile (dir_find_handle, &dir_find_data))
2554 return NULL;
2555 }
177c0ea7 2556
76b3903d
GV		 2557 /* Emacs never uses this value, so don't bother making it match
2558 value returned by stat(). */
2559 dir_static.d_ino = 1;
177c0ea7 2560
b07103dc
EZ		 2561 strcpy (dir_static.d_name, dir_find_data.cFileName);
2562
2563 /* If the file name in cFileName[] includes `?' characters, it means
2564 the original file name used characters that cannot be represented
2565 by the current ANSI codepage. To avoid total lossage, retrieve
2566 the short 8+3 alias of the long file name. */
2567 if (_mbspbrk (dir_static.d_name, "?"))
2568 {
2569 strcpy (dir_static.d_name, dir_find_data.cAlternateFileName);
2570 downcase = 1; /* 8+3 aliases are returned in all caps */
2571 }
2572 dir_static.d_namlen = strlen (dir_static.d_name);
76b3903d
GV		 2573 dir_static.d_reclen = sizeof (struct direct) - MAXNAMLEN + 3 +
2574 dir_static.d_namlen - dir_static.d_namlen % 4;
177c0ea7 2575
192788d7
EZ		 2576 /* If the file name in cFileName[] includes `?' characters, it means
2577 the original file name used characters that cannot be represented
2578 by the current ANSI codepage. To avoid total lossage, retrieve
2579 the short 8+3 alias of the long file name. */
2580 if (_mbspbrk (dir_find_data.cFileName, "?"))
2581 {
2582 strcpy (dir_static.d_name, dir_find_data.cAlternateFileName);
2583 /* 8+3 aliases are returned in all caps, which could break
2584 various alists that look at filenames' extensions. */
2585 downcase = 1;
2586 }
2587 else
2588 strcpy (dir_static.d_name, dir_find_data.cFileName);
2589 dir_static.d_namlen = strlen (dir_static.d_name);
76b3903d
GV		 2590 if (dir_is_fat)
2591 _strlwr (dir_static.d_name);
b07103dc 2592 else if (downcase)
76b3903d
GV		 2593 {
2594 register char *p;
2595 for (p = dir_static.d_name; *p; p++)
2596 if (*p >= 'a' && *p <= 'z')
2597 break;
2598 if (!*p)
2599 _strlwr (dir_static.d_name);
2600 }
177c0ea7 2601
76b3903d
GV		 2602 return &dir_static;
2603}
2604
bedf4aab 2605static HANDLE
e0c181dd 2606open_unc_volume (const char *path)
9d3355d1 2607{
177c0ea7 2608 NETRESOURCE nr;
9d3355d1
GV		 2609 HANDLE henum;
2610 int result;
2611
177c0ea7
JB		 2612 nr.dwScope = RESOURCE_GLOBALNET;
2613 nr.dwType = RESOURCETYPE_DISK;
2614 nr.dwDisplayType = RESOURCEDISPLAYTYPE_SERVER;
2615 nr.dwUsage = RESOURCEUSAGE_CONTAINER;
2616 nr.lpLocalName = NULL;
6e602566 2617 nr.lpRemoteName = (LPSTR)map_w32_filename (path, NULL);
177c0ea7
JB		 2618 nr.lpComment = NULL;
2619 nr.lpProvider = NULL;
9d3355d1 2620
ed3751c8
JB		 2621 result = WNetOpenEnum (RESOURCE_GLOBALNET, RESOURCETYPE_DISK,
2622 RESOURCEUSAGE_CONNECTABLE, &nr, &henum);
9d3355d1
GV		 2623
2624 if (result == NO_ERROR)
2625 return henum;
2626 else
2627 return INVALID_HANDLE_VALUE;
2628}
2629
bedf4aab 2630static char *
9d3355d1
GV		 2631read_unc_volume (HANDLE henum, char *readbuf, int size)
2632{
a302c7ae 2633 DWORD count;
9d3355d1 2634 int result;
a302c7ae 2635 DWORD bufsize = 512;
9d3355d1
GV		 2636 char *buffer;
2637 char *ptr;
2638
2639 count = 1;
2640 buffer = alloca (bufsize);
59eb0929 2641 result = WNetEnumResource (henum, &count, buffer, &bufsize);
9d3355d1
GV		 2642 if (result != NO_ERROR)
2643 return NULL;
2644
2645 /* WNetEnumResource returns \\resource\share...skip forward to "share". */
2646 ptr = ((LPNETRESOURCE) buffer)->lpRemoteName;
2647 ptr += 2;
2648 while (*ptr && !IS_DIRECTORY_SEP (*ptr)) ptr++;
2649 ptr++;
2650
2651 strncpy (readbuf, ptr, size);
2652 return readbuf;
2653}
2654
bedf4aab 2655static void
9d3355d1
GV		 2656close_unc_volume (HANDLE henum)
2657{
2658 if (henum != INVALID_HANDLE_VALUE)
2659 WNetCloseEnum (henum);
2660}
2661
bedf4aab 2662static DWORD
e0c181dd 2663unc_volume_file_attributes (const char *path)
9d3355d1
GV		 2664{
2665 HANDLE henum;
2666 DWORD attrs;
2667
2668 henum = open_unc_volume (path);
2669 if (henum == INVALID_HANDLE_VALUE)
2670 return -1;
2671
2672 attrs = FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_DIRECTORY;
2673
2674 close_unc_volume (henum);
2675
2676 return attrs;
2677}
2678
302d7d54
JR		 2679/* Ensure a network connection is authenticated. */
2680static void
2681logon_network_drive (const char *path)
2682{
2683 NETRESOURCE resource;
2684 char share[MAX_PATH];
2685 int i, n_slashes;
40a339c8 2686 char drive[4];
be4c6380 2687 UINT drvtype;
40a339c8 2688
be4c6380
EZ		 2689 if (IS_DIRECTORY_SEP (path[0]) && IS_DIRECTORY_SEP (path[1]))
2690 drvtype = DRIVE_REMOTE;
2691 else if (path[0] == '\0' || path[1] != ':')
2692 drvtype = GetDriveType (NULL);
2693 else
2694 {
2695 drive[0] = path[0];
2696 drive[1] = ':';
2697 drive[2] = '\\';
2698 drive[3] = '\0';
2699 drvtype = GetDriveType (drive);
2700 }
302d7d54
JR		 2701
2702 /* Only logon to networked drives. */
be4c6380 2703 if (drvtype != DRIVE_REMOTE)
302d7d54 2704 return;
40a339c8 2705
302d7d54
JR		 2706 n_slashes = 2;
2707 strncpy (share, path, MAX_PATH);
2708 /* Truncate to just server and share name. */
2709 for (i = 2; i < MAX_PATH; i++)
2710 {
2711 if (IS_DIRECTORY_SEP (share[i]) && ++n_slashes > 3)
2712 {
2713 share[i] = '\0';
2714 break;
2715 }
2716 }
2717
2718 resource.dwType = RESOURCETYPE_DISK;
2719 resource.lpLocalName = NULL;
2720 resource.lpRemoteName = share;
2721 resource.lpProvider = NULL;
2722
2723 WNetAddConnection2 (&resource, NULL, NULL, CONNECT_INTERACTIVE);
2724}
480b0c5b
GV		 2725
2726/* Shadow some MSVC runtime functions to map requests for long filenames
2727 to reasonable short names if necessary. This was originally added to
177c0ea7 2728 permit running Emacs on NT 3.1 on a FAT partition, which doesn't support
480b0c5b
GV		 2729 long file names. */
2730
2731int
2732sys_access (const char * path, int mode)
2733{
b3308d2e
KH		 2734 DWORD attributes;
2735
8d38f461
EZ		 2736 /* MSVCRT implementation of 'access' doesn't recognize D_OK, and its
2737 newer versions blow up when passed D_OK. */
b3308d2e 2738 path = map_w32_filename (path, NULL);
6dad7178
EZ		 2739 /* If the last element of PATH is a symlink, we need to resolve it
2740 to get the attributes of its target file. Note: any symlinks in
2741 PATH elements other than the last one are transparently resolved
2742 by GetFileAttributes below. */
2743 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
2744 path = chase_symlinks (path);
2745
2746 if ((attributes = GetFileAttributes (path)) == -1)
b3308d2e 2747 {
8d38f461
EZ		 2748 DWORD w32err = GetLastError ();
2749
2750 switch (w32err)
2751 {
6dad7178
EZ		 2752 case ERROR_INVALID_NAME:
2753 case ERROR_BAD_PATHNAME:
2754 if (is_unc_volume (path))
2755 {
2756 attributes = unc_volume_file_attributes (path);
2757 if (attributes == -1)
2758 {
2759 errno = EACCES;
2760 return -1;
2761 }
2762 break;
2763 }
2764 /* FALLTHROUGH */
8d38f461 2765 case ERROR_FILE_NOT_FOUND:
6dad7178 2766 case ERROR_BAD_NETPATH:
8d38f461
EZ		 2767 errno = ENOENT;
2768 break;
2769 default:
2770 errno = EACCES;
2771 break;
2772 }
b3308d2e
KH		 2773 return -1;
2774 }
2775 if ((mode & X_OK) != 0 && !is_exec (path))
2776 {
2777 errno = EACCES;
2778 return -1;
2779 }
2780 if ((mode & W_OK) != 0 && (attributes & FILE_ATTRIBUTE_READONLY) != 0)
2781 {
2782 errno = EACCES;
2783 return -1;
2784 }
2785 if ((mode & D_OK) != 0 && (attributes & FILE_ATTRIBUTE_DIRECTORY) == 0)
2786 {
2787 errno = EACCES;
2788 return -1;
2789 }
2790 return 0;
480b0c5b
GV		 2791}
2792
2793int
2794sys_chdir (const char * path)
2795{
fbd6baed 2796 return _chdir (map_w32_filename (path, NULL));
480b0c5b
GV		 2797}
2798
2799int
2800sys_chmod (const char * path, int mode)
2801{
6dad7178
EZ		 2802 path = chase_symlinks (map_w32_filename (path, NULL));
2803 return _chmod (path, mode);
480b0c5b
GV		 2804}
2805
2d5ab4bf
EZ		 2806int
2807sys_chown (const char *path, uid_t owner, gid_t group)
2808{
e3b88685 2809 if (sys_chmod (path, S_IREAD) == -1) /* check if file exists */
2d5ab4bf
EZ		 2810 return -1;
2811 return 0;
2812}
2813
480b0c5b
GV		 2814int
2815sys_creat (const char * path, int mode)
2816{
fbd6baed 2817 return _creat (map_w32_filename (path, NULL), mode);
480b0c5b
GV		 2818}
2819
2820FILE *
b56ceb92 2821sys_fopen (const char * path, const char * mode)
480b0c5b
GV		 2822{
2823 int fd;
2824 int oflag;
2825 const char * mode_save = mode;
2826
2827 /* Force all file handles to be non-inheritable. This is necessary to
2828 ensure child processes don't unwittingly inherit handles that might
2829 prevent future file access. */
2830
2831 if (mode[0] == 'r')
2832 oflag = O_RDONLY;
2833 else if (mode[0] == 'w' || mode[0] == 'a')
2834 oflag = O_WRONLY | O_CREAT | O_TRUNC;
95ed0025 2835 else
480b0c5b
GV		 2836 return NULL;
2837
2838 /* Only do simplistic option parsing. */
2839 while (*++mode)
2840 if (mode[0] == '+')
2841 {
2842 oflag &= ~(O_RDONLY | O_WRONLY);
2843 oflag |= O_RDWR;
2844 }
2845 else if (mode[0] == 'b')
2846 {
2847 oflag &= ~O_TEXT;
2848 oflag |= O_BINARY;
2849 }
2850 else if (mode[0] == 't')
2851 {
2852 oflag &= ~O_BINARY;
2853 oflag |= O_TEXT;
2854 }
2855 else break;
2856
fbd6baed 2857 fd = _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, 0644);
480b0c5b
GV		 2858 if (fd < 0)
2859 return NULL;
2860
76b3903d 2861 return _fdopen (fd, mode_save);
95ed0025 2862}
480b0c5b 2863
76b3903d 2864/* This only works on NTFS volumes, but is useful to have. */
480b0c5b 2865int
76b3903d 2866sys_link (const char * old, const char * new)
480b0c5b 2867{
76b3903d
GV		 2868 HANDLE fileh;
2869 int result = -1;
2870 char oldname[MAX_PATH], newname[MAX_PATH];
2871
2872 if (old == NULL || new == NULL)
2873 {
2874 errno = ENOENT;
2875 return -1;
2876 }
2877
2878 strcpy (oldname, map_w32_filename (old, NULL));
2879 strcpy (newname, map_w32_filename (new, NULL));
2880
2881 fileh = CreateFile (oldname, 0, 0, NULL, OPEN_EXISTING,
2882 FILE_FLAG_BACKUP_SEMANTICS, NULL);
2883 if (fileh != INVALID_HANDLE_VALUE)
2884 {
2885 int wlen;
2886
2887 /* Confusingly, the "alternate" stream name field does not apply
2888 when restoring a hard link, and instead contains the actual
2889 stream data for the link (ie. the name of the link to create).
2890 The WIN32_STREAM_ID structure before the cStreamName field is
2891 the stream header, which is then immediately followed by the
2892 stream data. */
2893
2894 struct {
2895 WIN32_STREAM_ID wid;
2896 WCHAR wbuffer[MAX_PATH]; /* extra space for link name */
2897 } data;
2898
2899 wlen = MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, newname, -1,
2900 data.wid.cStreamName, MAX_PATH);
2901 if (wlen > 0)
2902 {
2903 LPVOID context = NULL;
2904 DWORD wbytes = 0;
2905
2906 data.wid.dwStreamId = BACKUP_LINK;
2907 data.wid.dwStreamAttributes = 0;
ed3751c8 2908 data.wid.Size.LowPart = wlen * sizeof (WCHAR);
76b3903d
GV		 2909 data.wid.Size.HighPart = 0;
2910 data.wid.dwStreamNameSize = 0;
2911
2912 if (BackupWrite (fileh, (LPBYTE)&data,
2913 offsetof (WIN32_STREAM_ID, cStreamName)
2914 + data.wid.Size.LowPart,
2915 &wbytes, FALSE, FALSE, &context)
2916 && BackupWrite (fileh, NULL, 0, &wbytes, TRUE, FALSE, &context))
2917 {
2918 /* succeeded */
2919 result = 0;
2920 }
2921 else
2922 {
2923 /* Should try mapping GetLastError to errno; for now just
2924 indicate a general error (eg. links not supported). */
2925 errno = EINVAL; // perhaps EMLINK?
2926 }
2927 }
2928
2929 CloseHandle (fileh);
2930 }
2931 else
2932 errno = ENOENT;
2933
2934 return result;
480b0c5b
GV		 2935}
2936
2937int
2938sys_mkdir (const char * path)
2939{
fbd6baed 2940 return _mkdir (map_w32_filename (path, NULL));
480b0c5b
GV		 2941}
2942
9d1778b1
RS		 2943/* Because of long name mapping issues, we need to implement this
2944 ourselves. Also, MSVC's _mktemp returns NULL when it can't generate
2945 a unique name, instead of setting the input template to an empty
2946 string.
2947
2948 Standard algorithm seems to be use pid or tid with a letter on the
2949 front (in place of the 6 X's) and cycle through the letters to find a
2950 unique name. We extend that to allow any reasonable character as the
2951 first of the 6 X's. */
480b0c5b
GV		 2952char *
2953sys_mktemp (char * template)
2954{
9d1778b1
RS		 2955 char * p;
2956 int i;
2957 unsigned uid = GetCurrentThreadId ();
2958 static char first_char[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#";
2959
2960 if (template == NULL)
2961 return NULL;
2962 p = template + strlen (template);
2963 i = 5;
2964 /* replace up to the last 5 X's with uid in decimal */
2965 while (--p >= template && p[0] == 'X' && --i >= 0)
2966 {
2967 p[0] = '0' + uid % 10;
2968 uid /= 10;
2969 }
2970
2971 if (i < 0 && p[0] == 'X')
2972 {
2973 i = 0;
2974 do
2975 {
2976 int save_errno = errno;
2977 p[0] = first_char[i];
2978 if (sys_access (template, 0) < 0)
2979 {
2980 errno = save_errno;
2981 return template;
2982 }
2983 }
2984 while (++i < sizeof (first_char));
2985 }
2986
2987 /* Template is badly formed or else we can't generate a unique name,
2988 so return empty string */
2989 template[0] = 0;
2990 return template;
480b0c5b
GV		 2991}
2992
2993int
2994sys_open (const char * path, int oflag, int mode)
2995{
302f0b29
GM		 2996 const char* mpath = map_w32_filename (path, NULL);
2997 /* Try to open file without _O_CREAT, to be able to write to hidden
2998 and system files. Force all file handles to be
2999 non-inheritable. */
3000 int res = _open (mpath, (oflag & ~_O_CREAT) | _O_NOINHERIT, mode);
3001 if (res >= 0)
3002 return res;
3003 return _open (mpath, oflag | _O_NOINHERIT, mode);
480b0c5b
GV		 3004}
3005
3006int
3007sys_rename (const char * oldname, const char * newname)
3008{
cfb5e855 3009 BOOL result;
b3308d2e 3010 char temp[MAX_PATH];
069d2b50
L		 3011 int newname_dev;
3012 int oldname_dev;
480b0c5b 3013
e9e23e23 3014 /* MoveFile on Windows 95 doesn't correctly change the short file name
5162ffce
MB		 3015 alias in a number of circumstances (it is not easy to predict when
3016 just by looking at oldname and newname, unfortunately). In these
3017 cases, renaming through a temporary name avoids the problem.
3018
e9e23e23 3019 A second problem on Windows 95 is that renaming through a temp name when
5162ffce
MB		 3020 newname is uppercase fails (the final long name ends up in
3021 lowercase, although the short alias might be uppercase) UNLESS the
3022 long temp name is not 8.3.
3023
e9e23e23 3024 So, on Windows 95 we always rename through a temp name, and we make sure
5162ffce 3025 the temp name has a long extension to ensure correct renaming. */
480b0c5b 3026
fbd6baed 3027 strcpy (temp, map_w32_filename (oldname, NULL));
480b0c5b 3028
069d2b50
L		 3029 /* volume_info is set indirectly by map_w32_filename. */
3030 oldname_dev = volume_info.serialnum;
3031
417a7a0e 3032 if (os_subtype == OS_9X)
480b0c5b 3033 {
b3308d2e 3034 char * o;
480b0c5b 3035 char * p;
b3308d2e
KH		 3036 int i = 0;
3037
3038 oldname = map_w32_filename (oldname, NULL);
657d08d3 3039 if ((o = strrchr (oldname, '\\')))
b3308d2e
KH		 3040 o++;
3041 else
3042 o = (char *) oldname;
480b0c5b 3043
657d08d3 3044 if ((p = strrchr (temp, '\\')))
480b0c5b
GV		 3045 p++;
3046 else
3047 p = temp;
b3308d2e
KH		 3048
3049 do
3050 {
3051 /* Force temp name to require a manufactured 8.3 alias - this
3052 seems to make the second rename work properly. */
f313ee82 3053 sprintf (p, "_.%s.%u", o, i);
b3308d2e 3054 i++;
58f0cb7e 3055 result = rename (oldname, temp);
b3308d2e
KH		 3056 }
3057 /* This loop must surely terminate! */
cfb5e855 3058 while (result < 0 && errno == EEXIST);
58f0cb7e 3059 if (result < 0)
480b0c5b
GV		 3060 return -1;
3061 }
3062
fffa137c 3063 /* Emulate Unix behavior - newname is deleted if it already exists
5162ffce 3064 (at least if it is a file; don't do this for directories).
76b3903d 3065
b3308d2e
KH		 3066 Since we mustn't do this if we are just changing the case of the
3067 file name (we would end up deleting the file we are trying to
3068 rename!), we let rename detect if the destination file already
3069 exists - that way we avoid the possible pitfalls of trying to
3070 determine ourselves whether two names really refer to the same
3071 file, which is not always possible in the general case. (Consider
3072 all the permutations of shared or subst'd drives, etc.) */
3073
3074 newname = map_w32_filename (newname, NULL);
069d2b50
L		 3075
3076 /* volume_info is set indirectly by map_w32_filename. */
3077 newname_dev = volume_info.serialnum;
3078
eb9ea53f 3079 result = rename (temp, newname);
b3308d2e 3080
069d2b50
L		 3081 if (result < 0)
3082 {
6dad7178 3083 DWORD w32err = GetLastError ();
069d2b50
L		 3084
3085 if (errno == EACCES
3086 && newname_dev != oldname_dev)
3087 {
3088 /* The implementation of `rename' on Windows does not return
3089 errno = EXDEV when you are moving a directory to a
3090 different storage device (ex. logical disk). It returns
3091 EACCES instead. So here we handle such situations and
3092 return EXDEV. */
3093 DWORD attributes;
3094
3095 if ((attributes = GetFileAttributes (temp)) != -1
6dad7178 3096 && (attributes & FILE_ATTRIBUTE_DIRECTORY))
069d2b50
L		 3097 errno = EXDEV;
3098 }
3099 else if (errno == EEXIST)
3100 {
3101 if (_chmod (newname, 0666) != 0)
3102 return result;
3103 if (_unlink (newname) != 0)
3104 return result;
3105 result = rename (temp, newname);
3106 }
6dad7178
EZ		 3107 else if (w32err == ERROR_PRIVILEGE_NOT_HELD
3108 && is_symlink (temp))
3109 {
3110 /* This is Windows prohibiting the user from creating a
3111 symlink in another place, since that requires
3112 privileges. */
3113 errno = EPERM;
3114 }
069d2b50 3115 }
480b0c5b 3116
eb9ea53f 3117 return result;
480b0c5b
GV		 3118}
3119
3120int
3121sys_rmdir (const char * path)
3122{
fbd6baed 3123 return _rmdir (map_w32_filename (path, NULL));
480b0c5b
GV		 3124}
3125
3126int
3127sys_unlink (const char * path)
3128{
16bb7578
GV		 3129 path = map_w32_filename (path, NULL);
3130
3131 /* On Unix, unlink works without write permission. */
3132 _chmod (path, 0666);
3133 return _unlink (path);
480b0c5b
GV		 3134}
3135
3136static FILETIME utc_base_ft;
5da9424d 3137static ULONGLONG utc_base; /* In 100ns units */
480b0c5b
GV		 3138static int init = 0;
3139
5da9424d
JB		 3140#define FILETIME_TO_U64(result, ft) \
3141 do { \
3142 ULARGE_INTEGER uiTemp; \
3143 uiTemp.LowPart = (ft).dwLowDateTime; \
3144 uiTemp.HighPart = (ft).dwHighDateTime; \
3145 result = uiTemp.QuadPart; \
3146 } while (0)
3147
3148static void
b56ceb92 3149initialize_utc_base (void)
7c80d5ec 3150{
5da9424d
JB		 3151 /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */
3152 SYSTEMTIME st;
3153
3154 st.wYear = 1970;
3155 st.wMonth = 1;
3156 st.wDay = 1;
3157 st.wHour = 0;
3158 st.wMinute = 0;
3159 st.wSecond = 0;
3160 st.wMilliseconds = 0;
3161
3162 SystemTimeToFileTime (&st, &utc_base_ft);
3163 FILETIME_TO_U64 (utc_base, utc_base_ft);
7c80d5ec
EZ		 3164}
3165
480b0c5b
GV		 3166static time_t
3167convert_time (FILETIME ft)
3168{
5da9424d 3169 ULONGLONG tmp;
480b0c5b
GV		 3170
3171 if (!init)
3172 {
9d4f32e8 3173 initialize_utc_base ();
480b0c5b
GV		 3174 init = 1;
3175 }
3176
3177 if (CompareFileTime (&ft, &utc_base_ft) < 0)
3178 return 0;
3179
5da9424d
JB		 3180 FILETIME_TO_U64 (tmp, ft);
3181 return (time_t) ((tmp - utc_base) / 10000000L);
480b0c5b
GV		 3182}
3183
bedf4aab 3184static void
480b0c5b
GV		 3185convert_from_time_t (time_t time, FILETIME * pft)
3186{
5da9424d 3187 ULARGE_INTEGER tmp;
480b0c5b
GV		 3188
3189 if (!init)
3190 {
5da9424d 3191 initialize_utc_base ();
480b0c5b
GV		 3192 init = 1;
3193 }
3194
3195 /* time in 100ns units since 1-Jan-1601 */
5da9424d
JB		 3196 tmp.QuadPart = (ULONGLONG) time * 10000000L + utc_base;
3197 pft->dwHighDateTime = tmp.HighPart;
3198 pft->dwLowDateTime = tmp.LowPart;
480b0c5b 3199}
480b0c5b 3200
76b3903d
GV		 3201#if 0
3202/* No reason to keep this; faking inode values either by hashing or even
3203 using the file index from GetInformationByHandle, is not perfect and
3204 so by default Emacs doesn't use the inode values on Windows.
3205 Instead, we now determine file-truename correctly (except for
3206 possible drive aliasing etc). */
3207
3208/* Modified version of "PJW" algorithm (see the "Dragon" compiler book). */
480b0c5b 3209static unsigned
76b3903d 3210hashval (const unsigned char * str)
480b0c5b
GV		 3211{
3212 unsigned h = 0;
480b0c5b
GV		 3213 while (*str)
3214 {
3215 h = (h << 4) + *str++;
76b3903d 3216 h ^= (h >> 28);
480b0c5b
GV		 3217 }
3218 return h;
3219}
3220
3221/* Return the hash value of the canonical pathname, excluding the
3222 drive/UNC header, to get a hopefully unique inode number. */
76b3903d 3223static DWORD
480b0c5b
GV		 3224generate_inode_val (const char * name)
3225{
3226 char fullname[ MAX_PATH ];
3227 char * p;
3228 unsigned hash;
3229
76b3903d 3230 /* Get the truly canonical filename, if it exists. (Note: this
e1dbe924 3231 doesn't resolve aliasing due to subst commands, or recognize hard
76b3903d
GV		 3232 links. */
3233 if (!w32_get_long_filename ((char *)name, fullname, MAX_PATH))
1088b922 3234 emacs_abort ();
76b3903d
GV		 3235
3236 parse_root (fullname, &p);
fbd6baed 3237 /* Normal W32 filesystems are still case insensitive. */
480b0c5b 3238 _strlwr (p);
76b3903d 3239 return hashval (p);
480b0c5b
GV		 3240}
3241
76b3903d
GV		 3242#endif
3243
8aaaec6b 3244static PSECURITY_DESCRIPTOR
6dad7178
EZ		 3245get_file_security_desc_by_handle (HANDLE h)
3246{
3247 PSECURITY_DESCRIPTOR psd = NULL;
3248 DWORD err;
3249 SECURITY_INFORMATION si = OWNER_SECURITY_INFORMATION
3250 | GROUP_SECURITY_INFORMATION /* | DACL_SECURITY_INFORMATION */ ;
3251
3252 err = get_security_info (h, SE_FILE_OBJECT, si,
3253 NULL, NULL, NULL, NULL, &psd);
3254 if (err != ERROR_SUCCESS)
3255 return NULL;
3256
3257 return psd;
3258}
3259
3260static PSECURITY_DESCRIPTOR
3261get_file_security_desc_by_name (const char *fname)
8aaaec6b
EZ		 3262{
3263 PSECURITY_DESCRIPTOR psd = NULL;
3264 DWORD sd_len, err;
3265 SECURITY_INFORMATION si = OWNER_SECURITY_INFORMATION
3266 | GROUP_SECURITY_INFORMATION /* | DACL_SECURITY_INFORMATION */ ;
3267
3268 if (!get_file_security (fname, si, psd, 0, &sd_len))
3269 {
3270 err = GetLastError ();
3271 if (err != ERROR_INSUFFICIENT_BUFFER)
3272 return NULL;
3273 }
3274
3275 psd = xmalloc (sd_len);
3276 if (!get_file_security (fname, si, psd, sd_len, &sd_len))
3277 {
3278 xfree (psd);
3279 return NULL;
3280 }
3281
3282 return psd;
3283}
3284
3285static DWORD
3286get_rid (PSID sid)
3287{
3288 unsigned n_subauthorities;
3289
3290 /* Use the last sub-authority value of the RID, the relative
3291 portion of the SID, as user/group ID. */
3292 n_subauthorities = *get_sid_sub_authority_count (sid);
3293 if (n_subauthorities < 1)
3294 return 0; /* the "World" RID */
3295 return *get_sid_sub_authority (sid, n_subauthorities - 1);
3296}
3297
f8b35b24
EZ		 3298/* Caching SID and account values for faster lokup. */
3299
3300#ifdef __GNUC__
3301# define FLEXIBLE_ARRAY_MEMBER
3302#else
3303# define FLEXIBLE_ARRAY_MEMBER 1
3304#endif
3305
3306struct w32_id {
22749e9a 3307 unsigned rid;
f8b35b24
EZ		 3308 struct w32_id *next;
3309 char name[GNLEN+1];
3310 unsigned char sid[FLEXIBLE_ARRAY_MEMBER];
3311};
3312
3313static struct w32_id *w32_idlist;
3314
3315static int
22749e9a 3316w32_cached_id (PSID sid, unsigned *id, char *name)
f8b35b24
EZ		 3317{
3318 struct w32_id *tail, *found;
3319
3320 for (found = NULL, tail = w32_idlist; tail; tail = tail->next)
3321 {
3322 if (equal_sid ((PSID)tail->sid, sid))
3323 {
3324 found = tail;
3325 break;
3326 }
3327 }
3328 if (found)
3329 {
3330 *id = found->rid;
3331 strcpy (name, found->name);
3332 return 1;
3333 }
3334 else
3335 return 0;
3336}
3337
3338static void
22749e9a 3339w32_add_to_cache (PSID sid, unsigned id, char *name)
f8b35b24
EZ		 3340{
3341 DWORD sid_len;
3342 struct w32_id *new_entry;
3343
3344 /* We don't want to leave behind stale cache from when Emacs was
3345 dumped. */
3346 if (initialized)
3347 {
3348 sid_len = get_length_sid (sid);
3349 new_entry = xmalloc (offsetof (struct w32_id, sid) + sid_len);
3350 if (new_entry)
3351 {
3352 new_entry->rid = id;
3353 strcpy (new_entry->name, name);
3354 copy_sid (sid_len, (PSID)new_entry->sid, sid);
3355 new_entry->next = w32_idlist;
3356 w32_idlist = new_entry;
3357 }
3358 }
3359}
3360
8aaaec6b
EZ		 3361#define UID 1
3362#define GID 2
3363
3364static int
92340ec7 3365get_name_and_id (PSECURITY_DESCRIPTOR psd, unsigned *id, char *nm, int what)
8aaaec6b
EZ		 3366{
3367 PSID sid = NULL;
3368 char machine[MAX_COMPUTERNAME_LENGTH+1];
3369 BOOL dflt;
3370 SID_NAME_USE ignore;
3371 char name[UNLEN+1];
3372 DWORD name_len = sizeof (name);
3373 char domain[1024];
ed3751c8 3374 DWORD domain_len = sizeof (domain);
8aaaec6b
EZ		 3375 int use_dflt = 0;
3376 int result;
3377
3378 if (what == UID)
3379 result = get_security_descriptor_owner (psd, &sid, &dflt);
3380 else if (what == GID)
3381 result = get_security_descriptor_group (psd, &sid, &dflt);
3382 else
3383 result = 0;
3384
3385 if (!result || !is_valid_sid (sid))
3386 use_dflt = 1;
f8b35b24 3387 else if (!w32_cached_id (sid, id, nm))
8aaaec6b 3388 {
92340ec7 3389 if (!lookup_account_sid (NULL, sid, name, &name_len,
8aaaec6b
EZ		 3390 domain, &domain_len, &ignore)
3391 || name_len > UNLEN+1)
3392 use_dflt = 1;
3393 else
3394 {
3395 *id = get_rid (sid);
3396 strcpy (nm, name);
f8b35b24 3397 w32_add_to_cache (sid, *id, name);
8aaaec6b
EZ		 3398 }
3399 }
3400 return use_dflt;
3401}
3402
3403static void
92340ec7 3404get_file_owner_and_group (PSECURITY_DESCRIPTOR psd, struct stat *st)
8aaaec6b
EZ		 3405{
3406 int dflt_usr = 0, dflt_grp = 0;
3407
3408 if (!psd)
3409 {
3410 dflt_usr = 1;
3411 dflt_grp = 1;
3412 }
3413 else
3414 {
92340ec7 3415 if (get_name_and_id (psd, &st->st_uid, st->st_uname, UID))
8aaaec6b 3416 dflt_usr = 1;
92340ec7 3417 if (get_name_and_id (psd, &st->st_gid, st->st_gname, GID))
8aaaec6b
EZ		 3418 dflt_grp = 1;
3419 }
3420 /* Consider files to belong to current user/group, if we cannot get
3421 more accurate information. */
3422 if (dflt_usr)
3423 {
3424 st->st_uid = dflt_passwd.pw_uid;
3425 strcpy (st->st_uname, dflt_passwd.pw_name);
3426 }
3427 if (dflt_grp)
3428 {
3429 st->st_gid = dflt_passwd.pw_gid;
3430 strcpy (st->st_gname, dflt_group.gr_name);
3431 }
3432}
3433
be4c6380
EZ		 3434/* Return non-zero if NAME is a potentially slow filesystem. */
3435int
3436is_slow_fs (const char *name)
3437{
3438 char drive_root[4];
3439 UINT devtype;
3440
3441 if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1]))
3442 devtype = DRIVE_REMOTE; /* assume UNC name is remote */
3443 else if (!(strlen (name) >= 2 && IS_DEVICE_SEP (name[1])))
3444 devtype = GetDriveType (NULL); /* use root of current drive */
3445 else
3446 {
3447 /* GetDriveType needs the root directory of the drive. */
3448 strncpy (drive_root, name, 2);
3449 drive_root[2] = '\\';
3450 drive_root[3] = '\0';
3451 devtype = GetDriveType (drive_root);
3452 }
3453 return !(devtype == DRIVE_FIXED || devtype == DRIVE_RAMDISK);
3454}
3455
480b0c5b
GV		 3456/* MSVC stat function can't cope with UNC names and has other bugs, so
3457 replace it with our own. This also allows us to calculate consistent
6dad7178
EZ		 3458 inode values and owner/group without hacks in the main Emacs code. */
3459
3460static int
3461stat_worker (const char * path, struct stat * buf, int follow_symlinks)
480b0c5b 3462{
6dad7178 3463 char *name, *save_name, *r;
480b0c5b
GV		 3464 WIN32_FIND_DATA wfd;
3465 HANDLE fh;
6dad7178 3466 unsigned __int64 fake_inode = 0;
480b0c5b
GV		 3467 int permission;
3468 int len;
3469 int rootdir = FALSE;
8aaaec6b 3470 PSECURITY_DESCRIPTOR psd = NULL;
6dad7178
EZ		 3471 int is_a_symlink = 0;
3472 DWORD file_flags = FILE_FLAG_BACKUP_SEMANTICS;
3473 DWORD access_rights = 0;
3474 DWORD fattrs = 0, serialnum = 0, fs_high = 0, fs_low = 0, nlinks = 1;
3475 FILETIME ctime, atime, wtime;
480b0c5b
GV		 3476
3477 if (path == NULL || buf == NULL)
3478 {
3479 errno = EFAULT;
3480 return -1;
3481 }
3482
6dad7178 3483 save_name = name = (char *) map_w32_filename (path, &path);
22189f79
EZ		 3484 /* Must be valid filename, no wild cards or other invalid
3485 characters. We use _mbspbrk to support multibyte strings that
3486 might look to strpbrk as if they included literal *, ?, and other
3487 characters mentioned below that are disallowed by Windows
3488 filesystems. */
3489 if (_mbspbrk (name, "*?|<>\""))
480b0c5b
GV		 3490 {
3491 errno = ENOENT;
3492 return -1;
3493 }
3494
3495 /* Remove trailing directory separator, unless name is the root
3496 directory of a drive or UNC volume in which case ensure there
3497 is a trailing separator. */
3498 len = strlen (name);
480b0c5b
GV		 3499 name = strcpy (alloca (len + 2), name);
3500
6dad7178
EZ		 3501 /* Avoid a somewhat costly call to is_symlink if the filesystem
3502 doesn't support symlinks. */
3503 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
3504 is_a_symlink = is_symlink (name);
3505
3506 /* Plan A: Open the file and get all the necessary information via
3507 the resulting handle. This solves several issues in one blow:
3508
3509 . retrieves attributes for the target of a symlink, if needed
3510 . gets attributes of root directories and symlinks pointing to
3511 root directories, thus avoiding the need for special-casing
3512 these and detecting them by examining the file-name format
3513 . retrieves more accurate attributes (e.g., non-zero size for
3514 some directories, esp. directories that are junction points)
3515 . correctly resolves "c:/..", "/.." and similar file names
3516 . avoids run-time penalties for 99% of use cases
3517
3518 Plan A is always tried first, unless the user asked not to (but
3519 if the file is a symlink and we need to follow links, we try Plan
3520 A even if the user asked not to).
3521
3522 If Plan A fails, we go to Plan B (below), where various
3523 potentially expensive techniques must be used to handle "special"
3524 files such as UNC volumes etc. */
8aaaec6b 3525 if (!(NILP (Vw32_get_true_file_attributes)
19ced600 3526 || (EQ (Vw32_get_true_file_attributes, Qlocal) && is_slow_fs (name)))
6dad7178
EZ		 3527 /* Following symlinks requires getting the info by handle. */
3528 || (is_a_symlink && follow_symlinks))
480b0c5b 3529 {
6dad7178
EZ		 3530 BY_HANDLE_FILE_INFORMATION info;
3531
3532 if (is_a_symlink && !follow_symlinks)
3533 file_flags |= FILE_FLAG_OPEN_REPARSE_POINT;
3534 /* READ_CONTROL access rights are required to get security info
3535 by handle. But if the OS doesn't support security in the
3536 first place, we don't need to try. */
3537 if (is_windows_9x () != TRUE)
3538 access_rights |= READ_CONTROL;
3539
3540 fh = CreateFile (name, access_rights, 0, NULL, OPEN_EXISTING,
3541 file_flags, NULL);
3542 /* If CreateFile fails with READ_CONTROL, try again with zero as
3543 access rights. */
3544 if (fh == INVALID_HANDLE_VALUE && access_rights)
3545 fh = CreateFile (name, 0, 0, NULL, OPEN_EXISTING,
3546 file_flags, NULL);
3547 if (fh == INVALID_HANDLE_VALUE)
3548 goto no_true_file_attributes;
3549
3ed8598c 3550 /* This is more accurate in terms of getting the correct number
aa5ee2a3 3551 of links, but is quite slow (it is noticeable when Emacs is
480b0c5b 3552 making a list of file name completions). */
480b0c5b
GV		 3553 if (GetFileInformationByHandle (fh, &info))
3554 {
6dad7178 3555 nlinks = info.nNumberOfLinks;
76b3903d
GV		 3556 /* Might as well use file index to fake inode values, but this
3557 is not guaranteed to be unique unless we keep a handle open
3558 all the time (even then there are situations where it is
3559 not unique). Reputedly, there are at most 48 bits of info
3560 (on NTFS, presumably less on FAT). */
e3b88685
EZ		 3561 fake_inode = info.nFileIndexHigh;
3562 fake_inode <<= 32;
3563 fake_inode += info.nFileIndexLow;
6dad7178
EZ		 3564 serialnum = info.dwVolumeSerialNumber;
3565 fs_high = info.nFileSizeHigh;
3566 fs_low = info.nFileSizeLow;
3567 ctime = info.ftCreationTime;
3568 atime = info.ftLastAccessTime;
3569 wtime = info.ftLastWriteTime;
3570 fattrs = info.dwFileAttributes;
480b0c5b
GV		 3571 }
3572 else
3573 {
6dad7178
EZ		 3574 /* We don't go to Plan B here, because it's not clear that
3575 it's a good idea. The only known use case where
3576 CreateFile succeeds, but GetFileInformationByHandle fails
3577 (with ERROR_INVALID_FUNCTION) is for character devices
3578 such as NUL, PRN, etc. For these, switching to Plan B is
3579 a net loss, because we lose the character device
3580 attribute returned by GetFileType below (FindFirstFile
3581 doesn't set that bit in the attributes), and the other
3582 fields don't make sense for character devices anyway.
3583 Emacs doesn't really care for non-file entities in the
3584 context of l?stat, so neither do we. */
3585
3586 /* w32err is assigned so one could put a breakpoint here and
3587 examine its value, when GetFileInformationByHandle
3588 fails. */
3589 DWORD w32err = GetLastError ();
3590
3591 switch (w32err)
3592 {
3593 case ERROR_FILE_NOT_FOUND: /* can this ever happen? */
3594 errno = ENOENT;
3595 return -1;
3596 }
01f31dfb
AI		 3597 }
3598
6dad7178
EZ		 3599 /* Test for a symlink before testing for a directory, since
3600 symlinks to directories have the directory bit set, but we
3601 don't want them to appear as directories. */
3602 if (is_a_symlink && !follow_symlinks)
3603 buf->st_mode = S_IFLNK;
3604 else if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
3605 buf->st_mode = S_IFDIR;
93e0f0da
JR		 3606 else
3607 {
6dad7178
EZ		 3608 DWORD ftype = GetFileType (fh);
3609
3610 switch (ftype)
93e0f0da
JR		 3611 {
3612 case FILE_TYPE_DISK:
e3b88685 3613 buf->st_mode = S_IFREG;
93e0f0da
JR		 3614 break;
3615 case FILE_TYPE_PIPE:
e3b88685 3616 buf->st_mode = S_IFIFO;
93e0f0da
JR		 3617 break;
3618 case FILE_TYPE_CHAR:
3619 case FILE_TYPE_UNKNOWN:
3620 default:
e3b88685 3621 buf->st_mode = S_IFCHR;
93e0f0da 3622 }
480b0c5b 3623 }
6dad7178
EZ		 3624 /* We produce the fallback owner and group data, based on the
3625 current user that runs Emacs, in the following cases:
3626
3627 . this is Windows 9X
3628 . getting security by handle failed, and we need to produce
3629 information for the target of a symlink (this is better
3630 than producing a potentially misleading info about the
3631 symlink itself)
3632
3633 If getting security by handle fails, and we don't need to
3634 resolve symlinks, we try getting security by name. */
3635 if (is_windows_9x () != TRUE)
3636 psd = get_file_security_desc_by_handle (fh);
3637 if (psd)
3638 {
92340ec7 3639 get_file_owner_and_group (psd, buf);
6dad7178
EZ		 3640 LocalFree (psd);
3641 }
3642 else if (is_windows_9x () == TRUE)
92340ec7 3643 get_file_owner_and_group (NULL, buf);
6dad7178
EZ		 3644 else if (!(is_a_symlink && follow_symlinks))
3645 {
3646 psd = get_file_security_desc_by_name (name);
92340ec7 3647 get_file_owner_and_group (psd, buf);
6dad7178
EZ		 3648 xfree (psd);
3649 }
3650 else
92340ec7 3651 get_file_owner_and_group (NULL, buf);
01f31dfb 3652 CloseHandle (fh);
76b3903d
GV		 3653 }
3654 else
3655 {
6dad7178
EZ		 3656 no_true_file_attributes:
3657 /* Plan B: Either getting a handle on the file failed, or the
3658 caller explicitly asked us to not bother making this
3659 information more accurate.
3660
3661 Implementation note: In Plan B, we never bother to resolve
3662 symlinks, even if we got here because we tried Plan A and
3663 failed. That's because, even if the caller asked for extra
3664 precision by setting Vw32_get_true_file_attributes to t,
3665 resolving symlinks requires acquiring a file handle to the
3666 symlink, which we already know will fail. And if the user
3667 did not ask for extra precision, resolving symlinks will fly
3668 in the face of that request, since the user then wants the
3669 lightweight version of the code. */
3670 rootdir = (path >= save_name + len - 1
3671 && (IS_DIRECTORY_SEP (*path) || *path == 0));
3672
3673 /* If name is "c:/.." or "/.." then stat "c:/" or "/". */
3674 r = IS_DEVICE_SEP (name[1]) ? &name[2] : name;
3675 if (IS_DIRECTORY_SEP (r[0])
3676 && r[1] == '.' && r[2] == '.' && r[3] == '\0')
3677 r[1] = r[2] = '\0';
3678
3679 /* Note: If NAME is a symlink to the root of a UNC volume
3680 (i.e. "\\SERVER"), we will not detect that here, and we will
3681 return data about the symlink as result of FindFirst below.
3682 This is unfortunate, but that marginal use case does not
3683 justify a call to chase_symlinks which would impose a penalty
3684 on all the other use cases. (We get here for symlinks to
3685 roots of UNC volumes because CreateFile above fails for them,
3686 unlike with symlinks to root directories X:\ of drives.) */
3687 if (is_unc_volume (name))
3688 {
3689 fattrs = unc_volume_file_attributes (name);
3690 if (fattrs == -1)
3691 return -1;
3692
3693 ctime = atime = wtime = utc_base_ft;
3694 }
3695 else if (rootdir)
3696 {
3697 if (!IS_DIRECTORY_SEP (name[len-1]))
3698 strcat (name, "\\");
3699 if (GetDriveType (name) < 2)
3700 {
3701 errno = ENOENT;
3702 return -1;
3703 }
3704
3705 fattrs = FILE_ATTRIBUTE_DIRECTORY;
3706 ctime = atime = wtime = utc_base_ft;
3707 }
3708 else
3709 {
3710 if (IS_DIRECTORY_SEP (name[len-1]))
3711 name[len - 1] = 0;
3712
3713 /* (This is hacky, but helps when doing file completions on
3714 network drives.) Optimize by using information available from
3715 active readdir if possible. */
3716 len = strlen (dir_pathname);
3717 if (IS_DIRECTORY_SEP (dir_pathname[len-1]))
3718 len--;
3719 if (dir_find_handle != INVALID_HANDLE_VALUE
3720 && !(is_a_symlink && follow_symlinks)
3721 && strnicmp (save_name, dir_pathname, len) == 0
3722 && IS_DIRECTORY_SEP (name[len])
3723 && xstrcasecmp (name + len + 1, dir_static.d_name) == 0)
3724 {
3725 /* This was the last entry returned by readdir. */
3726 wfd = dir_find_data;
3727 }
3728 else
3729 {
3730 logon_network_drive (name);
3731
3732 fh = FindFirstFile (name, &wfd);
3733 if (fh == INVALID_HANDLE_VALUE)
3734 {
3735 errno = ENOENT;
3736 return -1;
3737 }
3738 FindClose (fh);
3739 }
3740 /* Note: if NAME is a symlink, the information we get from
3741 FindFirstFile is for the symlink, not its target. */
3742 fattrs = wfd.dwFileAttributes;
3743 ctime = wfd.ftCreationTime;
3744 atime = wfd.ftLastAccessTime;
3745 wtime = wfd.ftLastWriteTime;
3746 fs_high = wfd.nFileSizeHigh;
3747 fs_low = wfd.nFileSizeLow;
3748 fake_inode = 0;
3749 nlinks = 1;
3750 serialnum = volume_info.serialnum;
3751 }
3752 if (is_a_symlink && !follow_symlinks)
3753 buf->st_mode = S_IFLNK;
3754 else if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
3755 buf->st_mode = S_IFDIR;
3756 else
3757 buf->st_mode = S_IFREG;
8aaaec6b 3758
92340ec7 3759 get_file_owner_and_group (NULL, buf);
76b3903d
GV		 3760 }
3761
3762#if 0
3763 /* Not sure if there is any point in this. */
3764 if (!NILP (Vw32_generate_fake_inodes))
3765 fake_inode = generate_inode_val (name);
3766 else if (fake_inode == 0)
3767 {
3768 /* For want of something better, try to make everything unique. */
3769 static DWORD gen_num = 0;
3770 fake_inode = ++gen_num;
480b0c5b 3771 }
76b3903d
GV		 3772#endif
3773
6dad7178 3774 buf->st_ino = fake_inode;
480b0c5b 3775
6dad7178
EZ		 3776 buf->st_dev = serialnum;
3777 buf->st_rdev = serialnum;
480b0c5b 3778
6dad7178 3779 buf->st_size = fs_high;
8aaaec6b 3780 buf->st_size <<= 32;
6dad7178
EZ		 3781 buf->st_size += fs_low;
3782 buf->st_nlink = nlinks;
480b0c5b
GV		 3783
3784 /* Convert timestamps to Unix format. */
6dad7178
EZ		 3785 buf->st_mtime = convert_time (wtime);
3786 buf->st_atime = convert_time (atime);
480b0c5b 3787 if (buf->st_atime == 0) buf->st_atime = buf->st_mtime;
6dad7178 3788 buf->st_ctime = convert_time (ctime);
480b0c5b
GV		 3789 if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime;
3790
3791 /* determine rwx permissions */
6dad7178
EZ		 3792 if (is_a_symlink && !follow_symlinks)
3793 permission = S_IREAD | S_IWRITE | S_IEXEC; /* Posix expectations */
480b0c5b 3794 else
6dad7178
EZ		 3795 {
3796 if (fattrs & FILE_ATTRIBUTE_READONLY)
3797 permission = S_IREAD;
3798 else
3799 permission = S_IREAD | S_IWRITE;
177c0ea7 3800
6dad7178
EZ		 3801 if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
3802 permission |= S_IEXEC;
3803 else if (is_exec (name))
3804 permission |= S_IEXEC;
3805 }
480b0c5b
GV		 3806
3807 buf->st_mode |= permission | (permission >> 3) | (permission >> 6);
3808
3809 return 0;
3810}
3811
6dad7178
EZ		 3812int
3813stat (const char * path, struct stat * buf)
3814{
3815 return stat_worker (path, buf, 1);
3816}
3817
3818int
3819lstat (const char * path, struct stat * buf)
3820{
3821 return stat_worker (path, buf, 0);
3822}
3823
16bb7578
GV		 3824/* Provide fstat and utime as well as stat for consistent handling of
3825 file timestamps. */
3826int
3827fstat (int desc, struct stat * buf)
3828{
3829 HANDLE fh = (HANDLE) _get_osfhandle (desc);
3830 BY_HANDLE_FILE_INFORMATION info;
e3b88685 3831 unsigned __int64 fake_inode;
16bb7578
GV		 3832 int permission;
3833
3834 switch (GetFileType (fh) & ~FILE_TYPE_REMOTE)
3835 {
3836 case FILE_TYPE_DISK:
e3b88685 3837 buf->st_mode = S_IFREG;
16bb7578
GV		 3838 if (!GetFileInformationByHandle (fh, &info))
3839 {
3840 errno = EACCES;
3841 return -1;
3842 }
3843 break;
3844 case FILE_TYPE_PIPE:
e3b88685 3845 buf->st_mode = S_IFIFO;
16bb7578
GV		 3846 goto non_disk;
3847 case FILE_TYPE_CHAR:
3848 case FILE_TYPE_UNKNOWN:
3849 default:
e3b88685 3850 buf->st_mode = S_IFCHR;
16bb7578
GV		 3851 non_disk:
3852 memset (&info, 0, sizeof (info));
3853 info.dwFileAttributes = 0;
3854 info.ftCreationTime = utc_base_ft;
3855 info.ftLastAccessTime = utc_base_ft;
3856 info.ftLastWriteTime = utc_base_ft;
3857 }
3858
3859 if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
e3b88685 3860 buf->st_mode = S_IFDIR;
93e0f0da
JR		 3861
3862 buf->st_nlink = info.nNumberOfLinks;
3863 /* Might as well use file index to fake inode values, but this
3864 is not guaranteed to be unique unless we keep a handle open
3865 all the time (even then there are situations where it is
3866 not unique). Reputedly, there are at most 48 bits of info
3867 (on NTFS, presumably less on FAT). */
e3b88685
EZ		 3868 fake_inode = info.nFileIndexHigh;
3869 fake_inode <<= 32;
3870 fake_inode += info.nFileIndexLow;
16bb7578
GV		 3871
3872 /* MSVC defines _ino_t to be short; other libc's might not. */
3873 if (sizeof (buf->st_ino) == 2)
3874 buf->st_ino = fake_inode ^ (fake_inode >> 16);
3875 else
3876 buf->st_ino = fake_inode;
3877
8aaaec6b
EZ		 3878 /* Consider files to belong to current user.
3879 FIXME: this should use GetSecurityInfo API, but it is only
3880 available for _WIN32_WINNT >= 0x501. */
07f7980a
EZ		 3881 buf->st_uid = dflt_passwd.pw_uid;
3882 buf->st_gid = dflt_passwd.pw_gid;
8aaaec6b
EZ		 3883 strcpy (buf->st_uname, dflt_passwd.pw_name);
3884 strcpy (buf->st_gname, dflt_group.gr_name);
16bb7578
GV		 3885
3886 buf->st_dev = info.dwVolumeSerialNumber;
3887 buf->st_rdev = info.dwVolumeSerialNumber;
3888
8aaaec6b
EZ		 3889 buf->st_size = info.nFileSizeHigh;
3890 buf->st_size <<= 32;
3891 buf->st_size += info.nFileSizeLow;
16bb7578
GV		 3892
3893 /* Convert timestamps to Unix format. */
3894 buf->st_mtime = convert_time (info.ftLastWriteTime);
3895 buf->st_atime = convert_time (info.ftLastAccessTime);
3896 if (buf->st_atime == 0) buf->st_atime = buf->st_mtime;
3897 buf->st_ctime = convert_time (info.ftCreationTime);
3898 if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime;
3899
3900 /* determine rwx permissions */
3901 if (info.dwFileAttributes & FILE_ATTRIBUTE_READONLY)
e3b88685 3902 permission = S_IREAD;
16bb7578 3903 else
e3b88685 3904 permission = S_IREAD | S_IWRITE;
177c0ea7 3905
16bb7578 3906 if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
e3b88685 3907 permission |= S_IEXEC;
16bb7578
GV		 3908 else
3909 {
3910#if 0 /* no way of knowing the filename */
3911 char * p = strrchr (name, '.');
3912 if (p != NULL &&
05131107
JR		 3913 (xstrcasecmp (p, ".exe") == 0 ||
3914 xstrcasecmp (p, ".com") == 0 ||
3915 xstrcasecmp (p, ".bat") == 0 ||
3916 xstrcasecmp (p, ".cmd") == 0))
e3b88685 3917 permission |= S_IEXEC;
16bb7578
GV		 3918#endif
3919 }
3920
3921 buf->st_mode |= permission | (permission >> 3) | (permission >> 6);
3922
3923 return 0;
3924}
3925
3926int
3927utime (const char *name, struct utimbuf *times)
3928{
3929 struct utimbuf deftime;
3930 HANDLE fh;
3931 FILETIME mtime;
3932 FILETIME atime;
3933
3934 if (times == NULL)
3935 {
3936 deftime.modtime = deftime.actime = time (NULL);
3937 times = &deftime;
3938 }
3939
3940 /* Need write access to set times. */
0d9f584b 3941 fh = CreateFile (name, FILE_WRITE_ATTRIBUTES,
0ace05d3
EZ		 3942 /* If NAME specifies a directory, FILE_SHARE_DELETE
3943 allows other processes to delete files inside it,
3944 while we have the directory open. */
0d9f584b
EZ		 3945 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
3946 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
7604f298 3947 if (fh != INVALID_HANDLE_VALUE)
16bb7578
GV		 3948 {
3949 convert_from_time_t (times->actime, &atime);
3950 convert_from_time_t (times->modtime, &mtime);
3951 if (!SetFileTime (fh, NULL, &atime, &mtime))
3952 {
3953 CloseHandle (fh);
3954 errno = EACCES;
3955 return -1;
3956 }
3957 CloseHandle (fh);
3958 }
3959 else
3960 {
3961 errno = EINVAL;
3962 return -1;
3963 }
3964 return 0;
3965}
3966
7c80d5ec 3967\f
6dad7178
EZ		 3968/* Symlink-related functions. */
3969#ifndef SYMBOLIC_LINK_FLAG_DIRECTORY
3970#define SYMBOLIC_LINK_FLAG_DIRECTORY 0x1
3971#endif
3972
0f7bb05d 3973int
6dad7178 3974symlink (char const *filename, char const *linkname)
0f7bb05d 3975{
6dad7178
EZ		 3976 char linkfn[MAX_PATH], *tgtfn;
3977 DWORD flags = 0;
3978 int dir_access, filename_ends_in_slash;
3979
3980 /* Diagnostics follows Posix as much as possible. */
3981 if (filename == NULL || linkname == NULL)
3982 {
3983 errno = EFAULT;
3984 return -1;
3985 }
3986 if (!*filename)
3987 {
3988 errno = ENOENT;
3989 return -1;
3990 }
3991 if (strlen (filename) > MAX_PATH || strlen (linkname) > MAX_PATH)
3992 {
3993 errno = ENAMETOOLONG;
3994 return -1;
3995 }
3996
3997 strcpy (linkfn, map_w32_filename (linkname, NULL));
3998 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) == 0)
3999 {
4000 errno = EPERM;
4001 return -1;
4002 }
4003
4004 /* Note: since empty FILENAME was already rejected, we can safely
4005 refer to FILENAME[1]. */
4006 if (!(IS_DIRECTORY_SEP (filename[0]) || IS_DEVICE_SEP (filename[1])))
4007 {
4008 /* Non-absolute FILENAME is understood as being relative to
4009 LINKNAME's directory. We need to prepend that directory to
4010 FILENAME to get correct results from sys_access below, since
4011 otherwise it will interpret FILENAME relative to the
4012 directory where the Emacs process runs. Note that
4013 make-symbolic-link always makes sure LINKNAME is a fully
4014 expanded file name. */
4015 char tem[MAX_PATH];
4016 char *p = linkfn + strlen (linkfn);
4017
4018 while (p > linkfn && !IS_ANY_SEP (p[-1]))
4019 p--;
4020 if (p > linkfn)
4021 strncpy (tem, linkfn, p - linkfn);
4022 tem[p - linkfn] = '\0';
4023 strcat (tem, filename);
4024 dir_access = sys_access (tem, D_OK);
4025 }
4026 else
4027 dir_access = sys_access (filename, D_OK);
4028
4029 /* Since Windows distinguishes between symlinks to directories and
8b2e00a3 4030 to files, we provide a kludgy feature: if FILENAME doesn't
6dad7178
EZ		 4031 exist, but ends in a slash, we create a symlink to directory. If
4032 FILENAME exists and is a directory, we always create a symlink to
4033 directory. */
4034 filename_ends_in_slash = IS_DIRECTORY_SEP (filename[strlen (filename) - 1]);
4035 if (dir_access == 0 || filename_ends_in_slash)
4036 flags = SYMBOLIC_LINK_FLAG_DIRECTORY;
4037
4038 tgtfn = (char *)map_w32_filename (filename, NULL);
4039 if (filename_ends_in_slash)
4040 tgtfn[strlen (tgtfn) - 1] = '\0';
4041
4042 errno = 0;
4043 if (!create_symbolic_link (linkfn, tgtfn, flags))
4044 {
4045 /* ENOSYS is set by create_symbolic_link, when it detects that
4046 the OS doesn't support the CreateSymbolicLink API. */
4047 if (errno != ENOSYS)
4048 {
4049 DWORD w32err = GetLastError ();
4050
4051 switch (w32err)
4052 {
4053 /* ERROR_SUCCESS is sometimes returned when LINKFN and
4054 TGTFN point to the same file name, go figure. */
4055 case ERROR_SUCCESS:
4056 case ERROR_FILE_EXISTS:
4057 errno = EEXIST;
4058 break;
4059 case ERROR_ACCESS_DENIED:
4060 errno = EACCES;
4061 break;
4062 case ERROR_FILE_NOT_FOUND:
4063 case ERROR_PATH_NOT_FOUND:
4064 case ERROR_BAD_NETPATH:
4065 case ERROR_INVALID_REPARSE_DATA:
4066 errno = ENOENT;
4067 break;
4068 case ERROR_DIRECTORY:
4069 errno = EISDIR;
4070 break;
4071 case ERROR_PRIVILEGE_NOT_HELD:
4072 case ERROR_NOT_ALL_ASSIGNED:
4073 errno = EPERM;
4074 break;
4075 case ERROR_DISK_FULL:
4076 errno = ENOSPC;
4077 break;
4078 default:
4079 errno = EINVAL;
4080 break;
4081 }
4082 }
4083 return -1;
4084 }
4085 return 0;
0f7bb05d
EZ		 4086}
4087
6dad7178
EZ		 4088/* A quick inexpensive test of whether FILENAME identifies a file that
4089 is a symlink. Returns non-zero if it is, zero otherwise. FILENAME
4090 must already be in the normalized form returned by
4091 map_w32_filename.
4092
4093 Note: for repeated operations on many files, it is best to test
4094 whether the underlying volume actually supports symlinks, by
4095 testing the FILE_SUPPORTS_REPARSE_POINTS bit in volume's flags, and
4096 avoid the call to this function if it doesn't. That's because the
8b2e00a3 4097 call to GetFileAttributes takes a non-negligible time, especially
6dad7178
EZ		 4098 on non-local or removable filesystems. See stat_worker for an
4099 example of how to do that. */
4100static int
4101is_symlink (const char *filename)
4102{
4103 DWORD attrs;
4104 WIN32_FIND_DATA wfd;
4105 HANDLE fh;
4106
4107 attrs = GetFileAttributes (filename);
4108 if (attrs == -1)
4109 {
4110 DWORD w32err = GetLastError ();
4111
4112 switch (w32err)
4113 {
4114 case ERROR_BAD_NETPATH: /* network share, can't be a symlink */
4115 break;
4116 case ERROR_ACCESS_DENIED:
4117 errno = EACCES;
4118 break;
4119 case ERROR_FILE_NOT_FOUND:
4120 case ERROR_PATH_NOT_FOUND:
4121 default:
4122 errno = ENOENT;
4123 break;
4124 }
4125 return 0;
4126 }
4127 if ((attrs & FILE_ATTRIBUTE_REPARSE_POINT) == 0)
4128 return 0;
4129 logon_network_drive (filename);
4130 fh = FindFirstFile (filename, &wfd);
4131 if (fh == INVALID_HANDLE_VALUE)
4132 return 0;
4133 FindClose (fh);
4134 return (wfd.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) != 0
4135 && (wfd.dwReserved0 & IO_REPARSE_TAG_SYMLINK) == IO_REPARSE_TAG_SYMLINK;
4136}
4137
4138/* If NAME identifies a symbolic link, copy into BUF the file name of
4139 the symlink's target. Copy at most BUF_SIZE bytes, and do NOT
4140 null-terminate the target name, even if it fits. Return the number
4141 of bytes copied, or -1 if NAME is not a symlink or any error was
4142 encountered while resolving it. The file name copied into BUF is
4143 encoded in the current ANSI codepage. */
0f7bb05d 4144ssize_t
6dad7178 4145readlink (const char *name, char *buf, size_t buf_size)
0f7bb05d 4146{
6dad7178
EZ		 4147 const char *path;
4148 TOKEN_PRIVILEGES privs;
4149 int restore_privs = 0;
4150 HANDLE sh;
4151 ssize_t retval;
4152
4153 if (name == NULL)
4154 {
4155 errno = EFAULT;
4156 return -1;
4157 }
4158 if (!*name)
4159 {
4160 errno = ENOENT;
4161 return -1;
4162 }
4163
4164 path = map_w32_filename (name, NULL);
4165
4166 if (strlen (path) > MAX_PATH)
4167 {
4168 errno = ENAMETOOLONG;
4169 return -1;
4170 }
4171
4172 errno = 0;
4173 if (is_windows_9x () == TRUE
4174 || (volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) == 0
4175 || !is_symlink (path))
4176 {
4177 if (!errno)
4178 errno = EINVAL; /* not a symlink */
4179 return -1;
4180 }
4181
4182 /* Done with simple tests, now we're in for some _real_ work. */
4183 if (enable_privilege (SE_BACKUP_NAME, TRUE, &privs))
4184 restore_privs = 1;
4185 /* Implementation note: From here and onward, don't return early,
4186 since that will fail to restore the original set of privileges of
4187 the calling thread. */
4188
4189 retval = -1; /* not too optimistic, are we? */
4190
4191 /* Note: In the next call to CreateFile, we use zero as the 2nd
4192 argument because, when the symlink is a hidden/system file,
4193 e.g. 'C:\Users\All Users', GENERIC_READ fails with
4194 ERROR_ACCESS_DENIED. Zero seems to work just fine, both for file
4195 and directory symlinks. */
4196 sh = CreateFile (path, 0, 0, NULL, OPEN_EXISTING,
4197 FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS,
4198 NULL);
4199 if (sh != INVALID_HANDLE_VALUE)
4200 {
4201 BYTE reparse_buf[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
4202 REPARSE_DATA_BUFFER *reparse_data = (REPARSE_DATA_BUFFER *)&reparse_buf[0];
4203 DWORD retbytes;
4204
4205 if (!DeviceIoControl (sh, FSCTL_GET_REPARSE_POINT, NULL, 0,
4206 reparse_buf, MAXIMUM_REPARSE_DATA_BUFFER_SIZE,
4207 &retbytes, NULL))
4208 errno = EIO;
4209 else if (reparse_data->ReparseTag != IO_REPARSE_TAG_SYMLINK)
4210 errno = EINVAL;
4211 else
4212 {
4213 /* Copy the link target name, in wide characters, fro
4214 reparse_data, then convert it to multibyte encoding in
4215 the current locale's codepage. */
4216 WCHAR *lwname;
4217 BYTE lname[MAX_PATH];
4218 USHORT lname_len;
4219 USHORT lwname_len =
4220 reparse_data->SymbolicLinkReparseBuffer.PrintNameLength;
4221 WCHAR *lwname_src =
4222 reparse_data->SymbolicLinkReparseBuffer.PathBuffer
4223 + reparse_data->SymbolicLinkReparseBuffer.PrintNameOffset/sizeof(WCHAR);
4224
4225 /* According to MSDN, PrintNameLength does not include the
4226 terminating null character. */
4227 lwname = alloca ((lwname_len + 1) * sizeof(WCHAR));
4228 memcpy (lwname, lwname_src, lwname_len);
4229 lwname[lwname_len/sizeof(WCHAR)] = 0; /* null-terminate */
4230
4231 /* FIXME: Should we use the current file-name coding system
4232 instead of the fixed value of the ANSI codepage? */
4233 lname_len = WideCharToMultiByte (w32_ansi_code_page, 0, lwname, -1,
4234 lname, MAX_PATH, NULL, NULL);
4235 if (!lname_len)
4236 {
4237 /* WideCharToMultiByte failed. */
4238 DWORD w32err1 = GetLastError ();
4239
4240 switch (w32err1)
4241 {
4242 case ERROR_INSUFFICIENT_BUFFER:
4243 errno = ENAMETOOLONG;
4244 break;
4245 case ERROR_INVALID_PARAMETER:
4246 errno = EFAULT;
4247 break;
4248 case ERROR_NO_UNICODE_TRANSLATION:
4249 errno = ENOENT;
4250 break;
4251 default:
4252 errno = EINVAL;
4253 break;
4254 }
4255 }
4256 else
4257 {
4258 size_t size_to_copy = buf_size;
4259 BYTE *p = lname;
4260 BYTE *pend = p + lname_len;
4261
4262 /* Normalize like dostounix_filename does, but we don't
4263 want to assume that lname is null-terminated. */
4264 if (*p && p[1] == ':' && *p >= 'A' && *p <= 'Z')
4265 *p += 'a' - 'A';
4266 while (p <= pend)
4267 {
4268 if (*p == '\\')
4269 *p = '/';
4270 ++p;
4271 }
4272 /* Testing for null-terminated LNAME is paranoia:
4273 WideCharToMultiByte should always return a
4274 null-terminated string when its 4th argument is -1
4275 and its 3rd argument is null-terminated (which they
4276 are, see above). */
4277 if (lname[lname_len - 1] == '\0')
4278 lname_len--;
4279 if (lname_len <= buf_size)
4280 size_to_copy = lname_len;
4281 strncpy (buf, lname, size_to_copy);
4282 /* Success! */
4283 retval = size_to_copy;
4284 }
4285 }
4286 CloseHandle (sh);
4287 }
4288 else
4289 {
4290 /* CreateFile failed. */
4291 DWORD w32err2 = GetLastError ();
4292
4293 switch (w32err2)
4294 {
4295 case ERROR_FILE_NOT_FOUND:
4296 case ERROR_PATH_NOT_FOUND:
4297 errno = ENOENT;
4298 break;
4299 case ERROR_ACCESS_DENIED:
4300 case ERROR_TOO_MANY_OPEN_FILES:
4301 errno = EACCES;
4302 break;
4303 default:
4304 errno = EPERM;
4305 break;
4306 }
4307 }
4308 if (restore_privs)
4309 {
4310 restore_privilege (&privs);
4311 revert_to_self ();
4312 }
4313
4314 return retval;
0f7bb05d
EZ		 4315}
4316
6dad7178
EZ		 4317/* If FILE is a symlink, return its target (stored in a static
4318 buffer); otherwise return FILE.
4319
4320 This function repeatedly resolves symlinks in the last component of
4321 a chain of symlink file names, as in foo -> bar -> baz -> ...,
4322 until it arrives at a file whose last component is not a symlink,
4323 or some error occurs. It returns the target of the last
4324 successfully resolved symlink in the chain. If it succeeds to
4325 resolve even a single symlink, the value returned is an absolute
4326 file name with backslashes (result of GetFullPathName). By
4327 contrast, if the original FILE is returned, it is unaltered.
4328
4329 Note: This function can set errno even if it succeeds.
4330
4331 Implementation note: we only resolve the last portion ("basename")
4332 of the argument FILE and of each following file in the chain,
4333 disregarding any possible symlinks in its leading directories.
4334 This is because Windows system calls and library functions
4335 transparently resolve symlinks in leading directories and return
4336 correct information, as long as the basename is not a symlink. */
4337static char *
4338chase_symlinks (const char *file)
4339{
4340 static char target[MAX_PATH];
4341 char link[MAX_PATH];
4342 ssize_t res, link_len;
4343 int loop_count = 0;
4344
4345 if (is_windows_9x () == TRUE || !is_symlink (file))
4346 return (char *)file;
4347
4348 if ((link_len = GetFullPathName (file, MAX_PATH, link, NULL)) == 0)
4349 return (char *)file;
4350
4351 target[0] = '\0';
4352 do {
4353
4354 /* Remove trailing slashes, as we want to resolve the last
4355 non-trivial part of the link name. */
4356 while (link_len > 3 && IS_DIRECTORY_SEP (link[link_len-1]))
4357 link[link_len--] = '\0';
4358
4359 res = readlink (link, target, MAX_PATH);
4360 if (res > 0)
4361 {
4362 target[res] = '\0';
4363 if (!(IS_DEVICE_SEP (target[1])
25a20a3a 4364 || (IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]))))
6dad7178
EZ		 4365 {
4366 /* Target is relative. Append it to the directory part of
4367 the symlink, then copy the result back to target. */
4368 char *p = link + link_len;
4369
4370 while (p > link && !IS_ANY_SEP (p[-1]))
4371 p--;
4372 strcpy (p, target);
4373 strcpy (target, link);
4374 }
4375 /* Resolve any "." and ".." to get a fully-qualified file name
4376 in link[] again. */
4377 link_len = GetFullPathName (target, MAX_PATH, link, NULL);
4378 }
4379 } while (res > 0 && link_len > 0 && ++loop_count <= 100);
4380
4381 if (loop_count > 100)
4382 errno = ELOOP;
4383
4384 if (target[0] == '\0') /* not a single call to readlink succeeded */
4385 return (char *)file;
4386 return target;
4387}
4388
4389/* MS-Windows version of careadlinkat (cf. ../lib/careadlinkat.c). We
4390 have a fixed max size for file names, so we don't need the kind of
4391 alloc/malloc/realloc dance the gnulib version does. We also don't
4392 support FD-relative symlinks. */
973f782d
EZ		 4393char *
4394careadlinkat (int fd, char const *filename,
4395 char *buffer, size_t buffer_size,
4396 struct allocator const *alloc,
4397 ssize_t (*preadlinkat) (int, char const *, char *, size_t))
4398{
6dad7178
EZ		 4399 char linkname[MAX_PATH];
4400 ssize_t link_size;
4401
4402 if (fd != AT_FDCWD)
4403 {
4404 errno = EINVAL;
4405 return NULL;
4406 }
4407
4408 link_size = preadlinkat (fd, filename, linkname, sizeof(linkname));
4409
4410 if (link_size > 0)
4411 {
4412 char *retval = buffer;
4413
4414 linkname[link_size++] = '\0';
4415 if (link_size > buffer_size)
4416 retval = (char *)(alloc ? alloc->allocate : xmalloc) (link_size);
4417 if (retval)
4418 memcpy (retval, linkname, link_size);
4419
4420 return retval;
4421 }
973f782d
EZ		 4422 return NULL;
4423}
4424
4425ssize_t
4426careadlinkatcwd (int fd, char const *filename, char *buffer,
4427 size_t buffer_size)
4428{
4429 (void) fd;
4430 return readlink (filename, buffer, buffer_size);
4431}
4432
0f7bb05d 4433\f
7c80d5ec
EZ		 4434/* Support for browsing other processes and their attributes. See
4435 process.c for the Lisp bindings. */
4436
4437/* Helper wrapper functions. */
4438
bedf4aab
JB		 4439static HANDLE WINAPI
4440create_toolhelp32_snapshot (DWORD Flags, DWORD Ignored)
7c80d5ec
EZ		 4441{
4442 static CreateToolhelp32Snapshot_Proc s_pfn_Create_Toolhelp32_Snapshot = NULL;
4443
4444 if (g_b_init_create_toolhelp32_snapshot == 0)
4445 {
4446 g_b_init_create_toolhelp32_snapshot = 1;
4447 s_pfn_Create_Toolhelp32_Snapshot = (CreateToolhelp32Snapshot_Proc)
4448 GetProcAddress (GetModuleHandle ("kernel32.dll"),
4449 "CreateToolhelp32Snapshot");
4450 }
4451 if (s_pfn_Create_Toolhelp32_Snapshot == NULL)
4452 {
4453 return INVALID_HANDLE_VALUE;
4454 }
4455 return (s_pfn_Create_Toolhelp32_Snapshot (Flags, Ignored));
4456}
4457
bedf4aab
JB		 4458static BOOL WINAPI
4459process32_first (HANDLE hSnapshot, LPPROCESSENTRY32 lppe)
7c80d5ec
EZ		 4460{
4461 static Process32First_Proc s_pfn_Process32_First = NULL;
4462
4463 if (g_b_init_process32_first == 0)
4464 {
4465 g_b_init_process32_first = 1;
4466 s_pfn_Process32_First = (Process32First_Proc)
4467 GetProcAddress (GetModuleHandle ("kernel32.dll"),
4468 "Process32First");
4469 }
4470 if (s_pfn_Process32_First == NULL)
4471 {
4472 return FALSE;
4473 }
4474 return (s_pfn_Process32_First (hSnapshot, lppe));
4475}
4476
bedf4aab
JB		 4477static BOOL WINAPI
4478process32_next (HANDLE hSnapshot, LPPROCESSENTRY32 lppe)
7c80d5ec
EZ		 4479{
4480 static Process32Next_Proc s_pfn_Process32_Next = NULL;
4481
4482 if (g_b_init_process32_next == 0)
4483 {
4484 g_b_init_process32_next = 1;
4485 s_pfn_Process32_Next = (Process32Next_Proc)
4486 GetProcAddress (GetModuleHandle ("kernel32.dll"),
4487 "Process32Next");
4488 }
4489 if (s_pfn_Process32_Next == NULL)
4490 {
4491 return FALSE;
4492 }
4493 return (s_pfn_Process32_Next (hSnapshot, lppe));
4494}
4495
bedf4aab
JB		 4496static BOOL WINAPI
4497open_thread_token (HANDLE ThreadHandle,
4498 DWORD DesiredAccess,
4499 BOOL OpenAsSelf,
4500 PHANDLE TokenHandle)
7c80d5ec
EZ		 4501{
4502 static OpenThreadToken_Proc s_pfn_Open_Thread_Token = NULL;
4503 HMODULE hm_advapi32 = NULL;
4504 if (is_windows_9x () == TRUE)
4505 {
4506 SetLastError (ERROR_NOT_SUPPORTED);
4507 return FALSE;
4508 }
4509 if (g_b_init_open_thread_token == 0)
4510 {
4511 g_b_init_open_thread_token = 1;
4512 hm_advapi32 = LoadLibrary ("Advapi32.dll");
4513 s_pfn_Open_Thread_Token =
4514 (OpenThreadToken_Proc) GetProcAddress (hm_advapi32, "OpenThreadToken");
4515 }
4516 if (s_pfn_Open_Thread_Token == NULL)
4517 {
4518 SetLastError (ERROR_NOT_SUPPORTED);
4519 return FALSE;
4520 }
4521 return (
4522 s_pfn_Open_Thread_Token (
4523 ThreadHandle,
4524 DesiredAccess,
4525 OpenAsSelf,
4526 TokenHandle)
4527 );
4528}
4529
bedf4aab
JB		 4530static BOOL WINAPI
4531impersonate_self (SECURITY_IMPERSONATION_LEVEL ImpersonationLevel)
7c80d5ec
EZ		 4532{
4533 static ImpersonateSelf_Proc s_pfn_Impersonate_Self = NULL;
4534 HMODULE hm_advapi32 = NULL;
4535 if (is_windows_9x () == TRUE)
4536 {
4537 return FALSE;
4538 }
4539 if (g_b_init_impersonate_self == 0)
4540 {
4541 g_b_init_impersonate_self = 1;
4542 hm_advapi32 = LoadLibrary ("Advapi32.dll");
4543 s_pfn_Impersonate_Self =
4544 (ImpersonateSelf_Proc) GetProcAddress (hm_advapi32, "ImpersonateSelf");
4545 }
4546 if (s_pfn_Impersonate_Self == NULL)
4547 {
4548 return FALSE;
4549 }
4550 return s_pfn_Impersonate_Self (ImpersonationLevel);
4551}
4552
bedf4aab
JB		 4553static BOOL WINAPI
4554revert_to_self (void)
7c80d5ec
EZ		 4555{
4556 static RevertToSelf_Proc s_pfn_Revert_To_Self = NULL;
4557 HMODULE hm_advapi32 = NULL;
4558 if (is_windows_9x () == TRUE)
4559 {
4560 return FALSE;
4561 }
4562 if (g_b_init_revert_to_self == 0)
4563 {
4564 g_b_init_revert_to_self = 1;
4565 hm_advapi32 = LoadLibrary ("Advapi32.dll");
4566 s_pfn_Revert_To_Self =
4567 (RevertToSelf_Proc) GetProcAddress (hm_advapi32, "RevertToSelf");
4568 }
4569 if (s_pfn_Revert_To_Self == NULL)
4570 {
4571 return FALSE;
4572 }
4573 return s_pfn_Revert_To_Self ();
4574}
4575
bedf4aab
JB		 4576static BOOL WINAPI
4577get_process_memory_info (HANDLE h_proc,
4578 PPROCESS_MEMORY_COUNTERS mem_counters,
4579 DWORD bufsize)
7c80d5ec
EZ		 4580{
4581 static GetProcessMemoryInfo_Proc s_pfn_Get_Process_Memory_Info = NULL;
4582 HMODULE hm_psapi = NULL;
4583 if (is_windows_9x () == TRUE)
4584 {
4585 return FALSE;
4586 }
4587 if (g_b_init_get_process_memory_info == 0)
4588 {
4589 g_b_init_get_process_memory_info = 1;
4590 hm_psapi = LoadLibrary ("Psapi.dll");
4591 if (hm_psapi)
4592 s_pfn_Get_Process_Memory_Info = (GetProcessMemoryInfo_Proc)
4593 GetProcAddress (hm_psapi, "GetProcessMemoryInfo");
4594 }
4595 if (s_pfn_Get_Process_Memory_Info == NULL)
4596 {
4597 return FALSE;
4598 }
4599 return s_pfn_Get_Process_Memory_Info (h_proc, mem_counters, bufsize);
4600}
4601
bedf4aab
JB		 4602static BOOL WINAPI
4603get_process_working_set_size (HANDLE h_proc,
cb576b5c
FP		 4604 PSIZE_T minrss,
4605 PSIZE_T maxrss)
7c80d5ec
EZ		 4606{
4607 static GetProcessWorkingSetSize_Proc
4608 s_pfn_Get_Process_Working_Set_Size = NULL;
4609
4610 if (is_windows_9x () == TRUE)
4611 {
4612 return FALSE;
4613 }
4614 if (g_b_init_get_process_working_set_size == 0)
4615 {
4616 g_b_init_get_process_working_set_size = 1;
4617 s_pfn_Get_Process_Working_Set_Size = (GetProcessWorkingSetSize_Proc)
4618 GetProcAddress (GetModuleHandle ("kernel32.dll"),
4619 "GetProcessWorkingSetSize");
4620 }
4621 if (s_pfn_Get_Process_Working_Set_Size == NULL)
4622 {
4623 return FALSE;
4624 }
4625 return s_pfn_Get_Process_Working_Set_Size (h_proc, minrss, maxrss);
4626}
4627
bedf4aab
JB		 4628static BOOL WINAPI
4629global_memory_status (MEMORYSTATUS *buf)
7c80d5ec
EZ		 4630{
4631 static GlobalMemoryStatus_Proc s_pfn_Global_Memory_Status = NULL;
4632
4633 if (is_windows_9x () == TRUE)
4634 {
4635 return FALSE;
4636 }
4637 if (g_b_init_global_memory_status == 0)
4638 {
4639 g_b_init_global_memory_status = 1;
4640 s_pfn_Global_Memory_Status = (GlobalMemoryStatus_Proc)
4641 GetProcAddress (GetModuleHandle ("kernel32.dll"),
4642 "GlobalMemoryStatus");
4643 }
4644 if (s_pfn_Global_Memory_Status == NULL)
4645 {
4646 return FALSE;
4647 }
4648 return s_pfn_Global_Memory_Status (buf);
4649}
4650
bedf4aab
JB		 4651static BOOL WINAPI
4652global_memory_status_ex (MEMORY_STATUS_EX *buf)
7c80d5ec
EZ		 4653{
4654 static GlobalMemoryStatusEx_Proc s_pfn_Global_Memory_Status_Ex = NULL;
4655
4656 if (is_windows_9x () == TRUE)
4657 {
4658 return FALSE;
4659 }
4660 if (g_b_init_global_memory_status_ex == 0)
4661 {
4662 g_b_init_global_memory_status_ex = 1;
4663 s_pfn_Global_Memory_Status_Ex = (GlobalMemoryStatusEx_Proc)
4664 GetProcAddress (GetModuleHandle ("kernel32.dll"),
4665 "GlobalMemoryStatusEx");
4666 }
4667 if (s_pfn_Global_Memory_Status_Ex == NULL)
4668 {
4669 return FALSE;
4670 }
4671 return s_pfn_Global_Memory_Status_Ex (buf);
4672}
4673
4674Lisp_Object
b56ceb92 4675list_system_processes (void)
7c80d5ec
EZ		 4676{
4677 struct gcpro gcpro1;
4678 Lisp_Object proclist = Qnil;
4679 HANDLE h_snapshot;
4680
4681 h_snapshot = create_toolhelp32_snapshot (TH32CS_SNAPPROCESS, 0);
4682
4683 if (h_snapshot != INVALID_HANDLE_VALUE)
4684 {
4685 PROCESSENTRY32 proc_entry;
4686 DWORD proc_id;
4687 BOOL res;
4688
4689 GCPRO1 (proclist);
4690
4691 proc_entry.dwSize = sizeof (PROCESSENTRY32);
4692 for (res = process32_first (h_snapshot, &proc_entry); res;
4693 res = process32_next (h_snapshot, &proc_entry))
4694 {
4695 proc_id = proc_entry.th32ProcessID;
4696 proclist = Fcons (make_fixnum_or_float (proc_id), proclist);
4697 }
4698
4699 CloseHandle (h_snapshot);
4700 UNGCPRO;
4701 proclist = Fnreverse (proclist);
4702 }
4703
4704 return proclist;
4705}
4706
4707static int
4708enable_privilege (LPCTSTR priv_name, BOOL enable_p, TOKEN_PRIVILEGES *old_priv)
4709{
4710 TOKEN_PRIVILEGES priv;
4711 DWORD priv_size = sizeof (priv);
4712 DWORD opriv_size = sizeof (*old_priv);
4713 HANDLE h_token = NULL;
4714 HANDLE h_thread = GetCurrentThread ();
4715 int ret_val = 0;
4716 BOOL res;
4717
4718 res = open_thread_token (h_thread,
4719 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
4720 FALSE, &h_token);
4721 if (!res && GetLastError () == ERROR_NO_TOKEN)
4722 {
4723 if (impersonate_self (SecurityImpersonation))
4724 res = open_thread_token (h_thread,
4725 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
4726 FALSE, &h_token);
4727 }
4728 if (res)
4729 {
4730 priv.PrivilegeCount = 1;
4731 priv.Privileges[0].Attributes = enable_p ? SE_PRIVILEGE_ENABLED : 0;
4732 LookupPrivilegeValue (NULL, priv_name, &priv.Privileges[0].Luid);
4733 if (AdjustTokenPrivileges (h_token, FALSE, &priv, priv_size,
4734 old_priv, &opriv_size)
4735 && GetLastError () != ERROR_NOT_ALL_ASSIGNED)
4736 ret_val = 1;
4737 }
4738 if (h_token)
4739 CloseHandle (h_token);
4740
4741 return ret_val;
4742}
4743
4744static int
4745restore_privilege (TOKEN_PRIVILEGES *priv)
4746{
4747 DWORD priv_size = sizeof (*priv);
4748 HANDLE h_token = NULL;
4749 int ret_val = 0;
4750
4751 if (open_thread_token (GetCurrentThread (),
4752 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
4753 FALSE, &h_token))
4754 {
4755 if (AdjustTokenPrivileges (h_token, FALSE, priv, priv_size, NULL, NULL)
4756 && GetLastError () != ERROR_NOT_ALL_ASSIGNED)
4757 ret_val = 1;
4758 }
4759 if (h_token)
4760 CloseHandle (h_token);
4761
4762 return ret_val;
4763}
4764
ca300656 4765static Lisp_Object
d35af63c 4766ltime (ULONGLONG time_100ns)
7c80d5ec 4767{
d35af63c
PE		 4768 ULONGLONG time_sec = time_100ns / 10000000;
4769 int subsec = time_100ns % 10000000;
4770 return list4 (make_number (time_sec >> 16),
7c80d5ec 4771 make_number (time_sec & 0xffff),
d35af63c
PE		 4772 make_number (subsec / 10),
4773 make_number (subsec % 10 * 100000));
7c80d5ec
EZ		 4774}
4775
d35af63c 4776#define U64_TO_LISP_TIME(time) ltime (time)
5da9424d 4777
7c80d5ec 4778static int
b56ceb92
JB		 4779process_times (HANDLE h_proc, Lisp_Object *ctime, Lisp_Object *etime,
4780 Lisp_Object *stime, Lisp_Object *utime, Lisp_Object *ttime,
4781 double *pcpu)
7c80d5ec
EZ		 4782{
4783 FILETIME ft_creation, ft_exit, ft_kernel, ft_user, ft_current;
5da9424d 4784 ULONGLONG tem1, tem2, tem3, tem;
7c80d5ec
EZ		 4785
4786 if (!h_proc
4787 || !get_process_times_fn
ed3751c8
JB		 4788 || !(*get_process_times_fn) (h_proc, &ft_creation, &ft_exit,
4789 &ft_kernel, &ft_user))
7c80d5ec
EZ		 4790 return 0;
4791
4792 GetSystemTimeAsFileTime (&ft_current);
4793
5da9424d 4794 FILETIME_TO_U64 (tem1, ft_kernel);
5da9424d
JB		 4795 *stime = U64_TO_LISP_TIME (tem1);
4796
4797 FILETIME_TO_U64 (tem2, ft_user);
5da9424d
JB		 4798 *utime = U64_TO_LISP_TIME (tem2);
4799
4800 tem3 = tem1 + tem2;
4801 *ttime = U64_TO_LISP_TIME (tem3);
4802
4803 FILETIME_TO_U64 (tem, ft_creation);
3af03101
EZ		 4804 /* Process no 4 (System) returns zero creation time. */
4805 if (tem)
d35af63c 4806 tem -= utc_base;
5da9424d
JB		 4807 *ctime = U64_TO_LISP_TIME (tem);
4808
3af03101 4809 if (tem)
5da9424d
JB		 4810 {
4811 FILETIME_TO_U64 (tem3, ft_current);
d35af63c 4812 tem = (tem3 - utc_base) - tem;
5da9424d
JB		 4813 }
4814 *etime = U64_TO_LISP_TIME (tem);
7c80d5ec 4815
3af03101
EZ		 4816 if (tem)
4817 {
4818 *pcpu = 100.0 * (tem1 + tem2) / tem;
4819 if (*pcpu > 100)
4820 *pcpu = 100.0;
4821 }
4822 else
4823 *pcpu = 0;
4824
4825 return 1;
7c80d5ec
EZ		 4826}
4827
4828Lisp_Object
b56ceb92 4829system_process_attributes (Lisp_Object pid)
7c80d5ec
EZ		 4830{
4831 struct gcpro gcpro1, gcpro2, gcpro3;
4832 Lisp_Object attrs = Qnil;
4833 Lisp_Object cmd_str, decoded_cmd, tem;
4834 HANDLE h_snapshot, h_proc;
4835 DWORD proc_id;
754a2d13 4836 int found_proc = 0;
7c80d5ec 4837 char uname[UNLEN+1], gname[GNLEN+1], domain[1025];
32cef06e 4838 DWORD ulength = sizeof (uname), dlength = sizeof (domain), needed;
7c80d5ec
EZ		 4839 DWORD glength = sizeof (gname);
4840 HANDLE token = NULL;
4841 SID_NAME_USE user_type;
32cef06e
EZ		 4842 unsigned char *buf = NULL;
4843 DWORD blen = 0;
7c80d5ec
EZ		 4844 TOKEN_USER user_token;
4845 TOKEN_PRIMARY_GROUP group_token;
22749e9a
EZ		 4846 unsigned euid;
4847 unsigned egid;
7c80d5ec
EZ		 4848 PROCESS_MEMORY_COUNTERS mem;
4849 PROCESS_MEMORY_COUNTERS_EX mem_ex;
cb576b5c 4850 SIZE_T minrss, maxrss;
7c80d5ec 4851 MEMORYSTATUS memst;
b8526f6e 4852 MEMORY_STATUS_EX memstex;
7c80d5ec 4853 double totphys = 0.0;
031da700 4854 Lisp_Object ctime, stime, utime, etime, ttime;
7c80d5ec 4855 double pcpu;
32cef06e 4856 BOOL result = FALSE;
7c80d5ec
EZ		 4857
4858 CHECK_NUMBER_OR_FLOAT (pid);
4859 proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid);
4860
4861 h_snapshot = create_toolhelp32_snapshot (TH32CS_SNAPPROCESS, 0);
4862
4863 GCPRO3 (attrs, decoded_cmd, tem);
4864
4865 if (h_snapshot != INVALID_HANDLE_VALUE)
4866 {
4867 PROCESSENTRY32 pe;
4868 BOOL res;
4869
4870 pe.dwSize = sizeof (PROCESSENTRY32);
4871 for (res = process32_first (h_snapshot, &pe); res;
4872 res = process32_next (h_snapshot, &pe))
4873 {
4874 if (proc_id == pe.th32ProcessID)
4875 {
4876 if (proc_id == 0)
4877 decoded_cmd = build_string ("Idle");
4878 else
4879 {
4880 /* Decode the command name from locale-specific
4881 encoding. */
4882 cmd_str = make_unibyte_string (pe.szExeFile,
4883 strlen (pe.szExeFile));
4884 decoded_cmd =
4885 code_convert_string_norecord (cmd_str,
4886 Vlocale_coding_system, 0);
4887 }
4888 attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
4889 attrs = Fcons (Fcons (Qppid,
4890 make_fixnum_or_float (pe.th32ParentProcessID)),
4891 attrs);
4892 attrs = Fcons (Fcons (Qpri, make_number (pe.pcPriClassBase)),
4893 attrs);
4894 attrs = Fcons (Fcons (Qthcount,
4895 make_fixnum_or_float (pe.cntThreads)),
4896 attrs);
754a2d13 4897 found_proc = 1;
7c80d5ec
EZ		 4898 break;
4899 }
4900 }
4901
4902 CloseHandle (h_snapshot);
4903 }
4904
754a2d13
EZ		 4905 if (!found_proc)
4906 {
4907 UNGCPRO;
4908 return Qnil;
4909 }
4910
7c80d5ec
EZ		 4911 h_proc = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
4912 FALSE, proc_id);
4913 /* If we were denied a handle to the process, try again after
4914 enabling the SeDebugPrivilege in our process. */
4915 if (!h_proc)
4916 {
4917 TOKEN_PRIVILEGES priv_current;
4918
4919 if (enable_privilege (SE_DEBUG_NAME, TRUE, &priv_current))
4920 {
4921 h_proc = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
4922 FALSE, proc_id);
4923 restore_privilege (&priv_current);
4924 revert_to_self ();
4925 }
4926 }
32cef06e 4927 if (h_proc)
7c80d5ec 4928 {
32cef06e
EZ		 4929 result = open_process_token (h_proc, TOKEN_QUERY, &token);
4930 if (result)
f8b35b24 4931 {
32cef06e
EZ		 4932 result = get_token_information (token, TokenUser, NULL, 0, &blen);
4933 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
4934 {
4935 buf = xmalloc (blen);
4936 result = get_token_information (token, TokenUser,
4937 (LPVOID)buf, blen, &needed);
4938 if (result)
4939 {
4940 memcpy (&user_token, buf, sizeof (user_token));
4941 if (!w32_cached_id (user_token.User.Sid, &euid, uname))
4942 {
4943 euid = get_rid (user_token.User.Sid);
4944 result = lookup_account_sid (NULL, user_token.User.Sid,
4945 uname, &ulength,
4946 domain, &dlength,
4947 &user_type);
4948 if (result)
4949 w32_add_to_cache (user_token.User.Sid, euid, uname);
4950 else
4951 {
4952 strcpy (uname, "unknown");
4953 result = TRUE;
4954 }
4955 }
4956 ulength = strlen (uname);
4957 }
4958 }
7c80d5ec 4959 }
32cef06e 4960 if (result)
7c80d5ec 4961 {
32cef06e
EZ		 4962 /* Determine a reasonable euid and gid values. */
4963 if (xstrcasecmp ("administrator", uname) == 0)
7c80d5ec 4964 {
32cef06e
EZ		 4965 euid = 500; /* well-known Administrator uid */
4966 egid = 513; /* well-known None gid */
4967 }
4968 else
4969 {
4970 /* Get group id and name. */
4971 result = get_token_information (token, TokenPrimaryGroup,
4972 (LPVOID)buf, blen, &needed);
4973 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
f8b35b24 4974 {
32cef06e
EZ		 4975 buf = xrealloc (buf, blen = needed);
4976 result = get_token_information (token, TokenPrimaryGroup,
4977 (LPVOID)buf, blen, &needed);
4978 }
4979 if (result)
4980 {
4981 memcpy (&group_token, buf, sizeof (group_token));
4982 if (!w32_cached_id (group_token.PrimaryGroup, &egid, gname))
4983 {
4984 egid = get_rid (group_token.PrimaryGroup);
4985 dlength = sizeof (domain);
4986 result =
4987 lookup_account_sid (NULL, group_token.PrimaryGroup,
4988 gname, &glength, NULL, &dlength,
4989 &user_type);
4990 if (result)
4991 w32_add_to_cache (group_token.PrimaryGroup,
4992 egid, gname);
4993 else
4994 {
4995 strcpy (gname, "None");
4996 result = TRUE;
4997 }
4998 }
4999 glength = strlen (gname);
f8b35b24 5000 }
7c80d5ec 5001 }
7c80d5ec 5002 }
5f445726 5003 xfree (buf);
7c80d5ec 5004 }
32cef06e 5005 if (!result)
7c80d5ec 5006 {
32cef06e
EZ		 5007 if (!is_windows_9x ())
5008 {
5009 /* We couldn't open the process token, presumably because of
5010 insufficient access rights. Assume this process is run
5011 by the system. */
5012 strcpy (uname, "SYSTEM");
5013 strcpy (gname, "None");
5014 euid = 18; /* SYSTEM */
5015 egid = 513; /* None */
5016 glength = strlen (gname);
5017 ulength = strlen (uname);
5018 }
5019 /* If we are running under Windows 9X, where security calls are
5020 not supported, we assume all processes are run by the current
5021 user. */
5022 else if (GetUserName (uname, &ulength))
5023 {
5024 if (xstrcasecmp ("administrator", uname) == 0)
5025 euid = 0;
5026 else
5027 euid = 123;
5028 egid = euid;
5029 strcpy (gname, "None");
5030 glength = strlen (gname);
5031 ulength = strlen (uname);
5032 }
7c80d5ec 5033 else
32cef06e
EZ		 5034 {
5035 euid = 123;
5036 egid = 123;
5037 strcpy (uname, "administrator");
5038 ulength = strlen (uname);
5039 strcpy (gname, "None");
5040 glength = strlen (gname);
5041 }
5042 if (token)
5043 CloseHandle (token);
7c80d5ec 5044 }
7c80d5ec
EZ		 5045
5046 attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (euid)), attrs);
5047 tem = make_unibyte_string (uname, ulength);
5048 attrs = Fcons (Fcons (Quser,
5049 code_convert_string_norecord (tem, Vlocale_coding_system, 0)),
5050 attrs);
5051 attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (egid)), attrs);
5052 tem = make_unibyte_string (gname, glength);
5053 attrs = Fcons (Fcons (Qgroup,
5054 code_convert_string_norecord (tem, Vlocale_coding_system, 0)),
5055 attrs);
5056
5057 if (global_memory_status_ex (&memstex))
235661f6 5058#if __GNUC__ || (defined (_MSC_VER) && _MSC_VER >= 1300)
7c80d5ec 5059 totphys = memstex.ullTotalPhys / 1024.0;
235661f6
EZ		 5060#else
5061 /* Visual Studio 6 cannot convert an unsigned __int64 type to
5062 double, so we need to do this for it... */
5063 {
5064 DWORD tot_hi = memstex.ullTotalPhys >> 32;
5065 DWORD tot_md = (memstex.ullTotalPhys & 0x00000000ffffffff) >> 10;
5066 DWORD tot_lo = memstex.ullTotalPhys % 1024;
5067
5068 totphys = tot_hi * 4194304.0 + tot_md + tot_lo / 1024.0;
5069 }
5070#endif /* __GNUC__ || _MSC_VER >= 1300 */
7c80d5ec
EZ		 5071 else if (global_memory_status (&memst))
5072 totphys = memst.dwTotalPhys / 1024.0;
5073
5074 if (h_proc
5075 && get_process_memory_info (h_proc, (PROCESS_MEMORY_COUNTERS *)&mem_ex,
5076 sizeof (mem_ex)))
5077 {
cb576b5c 5078 SIZE_T rss = mem_ex.WorkingSetSize / 1024;
7c80d5ec
EZ		 5079
5080 attrs = Fcons (Fcons (Qmajflt,
5081 make_fixnum_or_float (mem_ex.PageFaultCount)),
5082 attrs);
5083 attrs = Fcons (Fcons (Qvsize,
5084 make_fixnum_or_float (mem_ex.PrivateUsage / 1024)),
5085 attrs);
5086 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (rss)), attrs);
5087 if (totphys)
5088 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
5089 }
5090 else if (h_proc
5091 && get_process_memory_info (h_proc, &mem, sizeof (mem)))
5092 {
cb576b5c 5093 SIZE_T rss = mem_ex.WorkingSetSize / 1024;
7c80d5ec
EZ		 5094
5095 attrs = Fcons (Fcons (Qmajflt,
5096 make_fixnum_or_float (mem.PageFaultCount)),
5097 attrs);
5098 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (rss)), attrs);
5099 if (totphys)
5100 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
5101 }
5102 else if (h_proc
5103 && get_process_working_set_size (h_proc, &minrss, &maxrss))
5104 {
5105 DWORD rss = maxrss / 1024;
5106
5107 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (maxrss / 1024)), attrs);
5108 if (totphys)
5109 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
5110 }
5111
031da700 5112 if (process_times (h_proc, &ctime, &etime, &stime, &utime, &ttime, &pcpu))
7c80d5ec
EZ		 5113 {
5114 attrs = Fcons (Fcons (Qutime, utime), attrs);
5115 attrs = Fcons (Fcons (Qstime, stime), attrs);
031da700 5116 attrs = Fcons (Fcons (Qtime, ttime), attrs);
7c80d5ec
EZ		 5117 attrs = Fcons (Fcons (Qstart, ctime), attrs);
5118 attrs = Fcons (Fcons (Qetime, etime), attrs);
5119 attrs = Fcons (Fcons (Qpcpu, make_float (pcpu)), attrs);
5120 }
5121
5122 /* FIXME: Retrieve command line by walking the PEB of the process. */
5123
5124 if (h_proc)
5125 CloseHandle (h_proc);
5126 UNGCPRO;
5127 return attrs;
5128}
5129
5130\f
480b0c5b
GV		 5131/* Wrappers for winsock functions to map between our file descriptors
5132 and winsock's handles; also set h_errno for convenience.
5133
5134 To allow Emacs to run on systems which don't have winsock support
5135 installed, we dynamically link to winsock on startup if present, and
5136 otherwise provide the minimum necessary functionality
5137 (eg. gethostname). */
5138
5139/* function pointers for relevant socket functions */
5140int (PASCAL *pfn_WSAStartup) (WORD wVersionRequired, LPWSADATA lpWSAData);
5141void (PASCAL *pfn_WSASetLastError) (int iError);
5142int (PASCAL *pfn_WSAGetLastError) (void);
26fb7bc4 5143int (PASCAL *pfn_WSAEventSelect) (SOCKET s, HANDLE hEventObject, long lNetworkEvents);
64570b36
KS		 5144HANDLE (PASCAL *pfn_WSACreateEvent) (void);
5145int (PASCAL *pfn_WSACloseEvent) (HANDLE hEvent);
480b0c5b
GV		 5146int (PASCAL *pfn_socket) (int af, int type, int protocol);
5147int (PASCAL *pfn_bind) (SOCKET s, const struct sockaddr *addr, int namelen);
5148int (PASCAL *pfn_connect) (SOCKET s, const struct sockaddr *addr, int namelen);
5149int (PASCAL *pfn_ioctlsocket) (SOCKET s, long cmd, u_long *argp);
5150int (PASCAL *pfn_recv) (SOCKET s, char * buf, int len, int flags);
5151int (PASCAL *pfn_send) (SOCKET s, const char * buf, int len, int flags);
5152int (PASCAL *pfn_closesocket) (SOCKET s);
5153int (PASCAL *pfn_shutdown) (SOCKET s, int how);
5154int (PASCAL *pfn_WSACleanup) (void);
5155
5156u_short (PASCAL *pfn_htons) (u_short hostshort);
5157u_short (PASCAL *pfn_ntohs) (u_short netshort);
5158unsigned long (PASCAL *pfn_inet_addr) (const char * cp);
5159int (PASCAL *pfn_gethostname) (char * name, int namelen);
5160struct hostent * (PASCAL *pfn_gethostbyname) (const char * name);
5161struct servent * (PASCAL *pfn_getservbyname) (const char * name, const char * proto);
ecd270eb 5162int (PASCAL *pfn_getpeername) (SOCKET s, struct sockaddr *addr, int * namelen);
962955c5
JR		 5163int (PASCAL *pfn_setsockopt) (SOCKET s, int level, int optname,
5164 const char * optval, int optlen);
5165int (PASCAL *pfn_listen) (SOCKET s, int backlog);
5166int (PASCAL *pfn_getsockname) (SOCKET s, struct sockaddr * name,
5167 int * namelen);
5168SOCKET (PASCAL *pfn_accept) (SOCKET s, struct sockaddr * addr, int * addrlen);
5169int (PASCAL *pfn_recvfrom) (SOCKET s, char * buf, int len, int flags,
5170 struct sockaddr * from, int * fromlen);
5171int (PASCAL *pfn_sendto) (SOCKET s, const char * buf, int len, int flags,
5172 const struct sockaddr * to, int tolen);
5173
f1614061
RS		 5174/* SetHandleInformation is only needed to make sockets non-inheritable. */
5175BOOL (WINAPI *pfn_SetHandleInformation) (HANDLE object, DWORD mask, DWORD flags);
5176#ifndef HANDLE_FLAG_INHERIT
5177#define HANDLE_FLAG_INHERIT 1
5178#endif
480b0c5b 5179
f249a012
RS		 5180HANDLE winsock_lib;
5181static int winsock_inuse;
480b0c5b 5182
f249a012 5183BOOL
480b0c5b
GV		 5184term_winsock (void)
5185{
f249a012 5186 if (winsock_lib != NULL && winsock_inuse == 0)
480b0c5b 5187 {
f249a012
RS		 5188 /* Not sure what would cause WSAENETDOWN, or even if it can happen
5189 after WSAStartup returns successfully, but it seems reasonable
5190 to allow unloading winsock anyway in that case. */
5191 if (pfn_WSACleanup () == 0 ||
5192 pfn_WSAGetLastError () == WSAENETDOWN)
5193 {
5194 if (FreeLibrary (winsock_lib))
5195 winsock_lib = NULL;
5196 return TRUE;
5197 }
480b0c5b 5198 }
f249a012 5199 return FALSE;
480b0c5b
GV		 5200}
5201
f249a012
RS		 5202BOOL
5203init_winsock (int load_now)
480b0c5b
GV		 5204{
5205 WSADATA winsockData;
5206
f249a012
RS		 5207 if (winsock_lib != NULL)
5208 return TRUE;
f1614061 5209
f1614061
RS		 5210 pfn_SetHandleInformation
5211 = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"),
5212 "SetHandleInformation");
5213
64570b36 5214 winsock_lib = LoadLibrary ("Ws2_32.dll");
480b0c5b
GV		 5215
5216 if (winsock_lib != NULL)
5217 {
5218 /* dynamically link to socket functions */
5219
5220#define LOAD_PROC(fn) \
5221 if ((pfn_##fn = (void *) GetProcAddress (winsock_lib, #fn)) == NULL) \
5222 goto fail;
5223
ed3751c8
JB		 5224 LOAD_PROC (WSAStartup);
5225 LOAD_PROC (WSASetLastError);
5226 LOAD_PROC (WSAGetLastError);
5227 LOAD_PROC (WSAEventSelect);
5228 LOAD_PROC (WSACreateEvent);
5229 LOAD_PROC (WSACloseEvent);
5230 LOAD_PROC (socket);
5231 LOAD_PROC (bind);
5232 LOAD_PROC (connect);
5233 LOAD_PROC (ioctlsocket);
5234 LOAD_PROC (recv);
5235 LOAD_PROC (send);
5236 LOAD_PROC (closesocket);
5237 LOAD_PROC (shutdown);
5238 LOAD_PROC (htons);
5239 LOAD_PROC (ntohs);
5240 LOAD_PROC (inet_addr);
5241 LOAD_PROC (gethostname);
5242 LOAD_PROC (gethostbyname);
5243 LOAD_PROC (getservbyname);
5244 LOAD_PROC (getpeername);
5245 LOAD_PROC (WSACleanup);
5246 LOAD_PROC (setsockopt);
5247 LOAD_PROC (listen);
5248 LOAD_PROC (getsockname);
5249 LOAD_PROC (accept);
5250 LOAD_PROC (recvfrom);
5251 LOAD_PROC (sendto);
f249a012
RS		 5252#undef LOAD_PROC
5253
480b0c5b
GV		 5254 /* specify version 1.1 of winsock */
5255 if (pfn_WSAStartup (0x101, &winsockData) == 0)
5256 {
f249a012
RS		 5257 if (winsockData.wVersion != 0x101)
5258 goto fail;
5259
5260 if (!load_now)
5261 {
5262 /* Report that winsock exists and is usable, but leave
5263 socket functions disabled. I am assuming that calling
5264 WSAStartup does not require any network interaction,
5265 and in particular does not cause or require a dial-up
5266 connection to be established. */
5267
5268 pfn_WSACleanup ();
5269 FreeLibrary (winsock_lib);
5270 winsock_lib = NULL;
5271 }
5272 winsock_inuse = 0;
5273 return TRUE;
480b0c5b
GV		 5274 }
5275
5276 fail:
5277 FreeLibrary (winsock_lib);
f249a012 5278 winsock_lib = NULL;
480b0c5b 5279 }
f249a012
RS		 5280
5281 return FALSE;
480b0c5b
GV		 5282}
5283
5284
5285int h_errno = 0;
5286
f8381794 5287/* function to set h_errno for compatibility; map winsock error codes to
480b0c5b
GV		 5288 normal system codes where they overlap (non-overlapping definitions
5289 are already in <sys/socket.h> */
9bfb11f9 5290static void
b56ceb92 5291set_errno (void)
480b0c5b 5292{
f249a012 5293 if (winsock_lib == NULL)
480b0c5b
GV		 5294 h_errno = EINVAL;
5295 else
5296 h_errno = pfn_WSAGetLastError ();
5297
5298 switch (h_errno)
5299 {
5300 case WSAEACCES: h_errno = EACCES; break;
5301 case WSAEBADF: h_errno = EBADF; break;
5302 case WSAEFAULT: h_errno = EFAULT; break;
5303 case WSAEINTR: h_errno = EINTR; break;
5304 case WSAEINVAL: h_errno = EINVAL; break;
5305 case WSAEMFILE: h_errno = EMFILE; break;
5306 case WSAENAMETOOLONG: h_errno = ENAMETOOLONG; break;
5307 case WSAENOTEMPTY: h_errno = ENOTEMPTY; break;
5308 }
5309 errno = h_errno;
5310}
5311
9bfb11f9 5312static void
b56ceb92 5313check_errno (void)
480b0c5b 5314{
f249a012 5315 if (h_errno == 0 && winsock_lib != NULL)
480b0c5b
GV		 5316 pfn_WSASetLastError (0);
5317}
5318
d8fcc1b9
AI		 5319/* Extend strerror to handle the winsock-specific error codes. */
5320struct {
5321 int errnum;
5322 char * msg;
5323} _wsa_errlist[] = {
1db5b1ad
JB		 5324 {WSAEINTR , "Interrupted function call"},
5325 {WSAEBADF , "Bad file descriptor"},
5326 {WSAEACCES , "Permission denied"},
5327 {WSAEFAULT , "Bad address"},
5328 {WSAEINVAL , "Invalid argument"},
5329 {WSAEMFILE , "Too many open files"},
5330
5331 {WSAEWOULDBLOCK , "Resource temporarily unavailable"},
5332 {WSAEINPROGRESS , "Operation now in progress"},
5333 {WSAEALREADY , "Operation already in progress"},
5334 {WSAENOTSOCK , "Socket operation on non-socket"},
5335 {WSAEDESTADDRREQ , "Destination address required"},
5336 {WSAEMSGSIZE , "Message too long"},
5337 {WSAEPROTOTYPE , "Protocol wrong type for socket"},
5338 {WSAENOPROTOOPT , "Bad protocol option"},
5339 {WSAEPROTONOSUPPORT , "Protocol not supported"},
5340 {WSAESOCKTNOSUPPORT , "Socket type not supported"},
5341 {WSAEOPNOTSUPP , "Operation not supported"},
5342 {WSAEPFNOSUPPORT , "Protocol family not supported"},
5343 {WSAEAFNOSUPPORT , "Address family not supported by protocol family"},
5344 {WSAEADDRINUSE , "Address already in use"},
5345 {WSAEADDRNOTAVAIL , "Cannot assign requested address"},
5346 {WSAENETDOWN , "Network is down"},
5347 {WSAENETUNREACH , "Network is unreachable"},
5348 {WSAENETRESET , "Network dropped connection on reset"},
5349 {WSAECONNABORTED , "Software caused connection abort"},
5350 {WSAECONNRESET , "Connection reset by peer"},
5351 {WSAENOBUFS , "No buffer space available"},
5352 {WSAEISCONN , "Socket is already connected"},
5353 {WSAENOTCONN , "Socket is not connected"},
5354 {WSAESHUTDOWN , "Cannot send after socket shutdown"},
5355 {WSAETOOMANYREFS , "Too many references"}, /* not sure */
5356 {WSAETIMEDOUT , "Connection timed out"},
5357 {WSAECONNREFUSED , "Connection refused"},
5358 {WSAELOOP , "Network loop"}, /* not sure */
5359 {WSAENAMETOOLONG , "Name is too long"},
5360 {WSAEHOSTDOWN , "Host is down"},
5361 {WSAEHOSTUNREACH , "No route to host"},
5362 {WSAENOTEMPTY , "Buffer not empty"}, /* not sure */
5363 {WSAEPROCLIM , "Too many processes"},
5364 {WSAEUSERS , "Too many users"}, /* not sure */
5365 {WSAEDQUOT , "Double quote in host name"}, /* really not sure */
5366 {WSAESTALE , "Data is stale"}, /* not sure */
5367 {WSAEREMOTE , "Remote error"}, /* not sure */
5368
5369 {WSASYSNOTREADY , "Network subsystem is unavailable"},
5370 {WSAVERNOTSUPPORTED , "WINSOCK.DLL version out of range"},
5371 {WSANOTINITIALISED , "Winsock not initialized successfully"},
5372 {WSAEDISCON , "Graceful shutdown in progress"},
d8fcc1b9 5373#ifdef WSAENOMORE
1db5b1ad
JB		 5374 {WSAENOMORE , "No more operations allowed"}, /* not sure */
5375 {WSAECANCELLED , "Operation cancelled"}, /* not sure */
5376 {WSAEINVALIDPROCTABLE , "Invalid procedure table from service provider"},
5377 {WSAEINVALIDPROVIDER , "Invalid service provider version number"},
5378 {WSAEPROVIDERFAILEDINIT , "Unable to initialize a service provider"},
5379 {WSASYSCALLFAILURE , "System call failure"},
5380 {WSASERVICE_NOT_FOUND , "Service not found"}, /* not sure */
5381 {WSATYPE_NOT_FOUND , "Class type not found"},
5382 {WSA_E_NO_MORE , "No more resources available"}, /* really not sure */
5383 {WSA_E_CANCELLED , "Operation already cancelled"}, /* really not sure */
5384 {WSAEREFUSED , "Operation refused"}, /* not sure */
d8fcc1b9 5385#endif
177c0ea7 5386
1db5b1ad
JB		 5387 {WSAHOST_NOT_FOUND , "Host not found"},
5388 {WSATRY_AGAIN , "Authoritative host not found during name lookup"},
5389 {WSANO_RECOVERY , "Non-recoverable error during name lookup"},
5390 {WSANO_DATA , "Valid name, no data record of requested type"},
d8fcc1b9 5391
1db5b1ad 5392 {-1, NULL}
d8fcc1b9
AI		 5393};
5394
5395char *
ed3751c8 5396sys_strerror (int error_no)
d8fcc1b9
AI		 5397{
5398 int i;
5399 static char unknown_msg[40];
5400
a302c7ae
AI		 5401 if (error_no >= 0 && error_no < sys_nerr)
5402 return sys_errlist[error_no];
d8fcc1b9
AI		 5403
5404 for (i = 0; _wsa_errlist[i].errnum >= 0; i++)
5405 if (_wsa_errlist[i].errnum == error_no)
5406 return _wsa_errlist[i].msg;
5407
ed3751c8 5408 sprintf (unknown_msg, "Unidentified error: %d", error_no);
d8fcc1b9
AI		 5409 return unknown_msg;
5410}
5411
480b0c5b
GV		 5412/* [andrewi 3-May-96] I've had conflicting results using both methods,
5413 but I believe the method of keeping the socket handle separate (and
5414 insuring it is not inheritable) is the correct one. */
5415
480b0c5b 5416#define SOCK_HANDLE(fd) ((SOCKET) fd_info[fd].hnd)
480b0c5b 5417
bedf4aab 5418static int socket_to_fd (SOCKET s);
962955c5 5419
480b0c5b 5420int
ed3751c8 5421sys_socket (int af, int type, int protocol)
480b0c5b 5422{
962955c5 5423 SOCKET s;
480b0c5b 5424
f249a012 5425 if (winsock_lib == NULL)
480b0c5b
GV		 5426 {
5427 h_errno = ENETDOWN;
5428 return INVALID_SOCKET;
5429 }
5430
5431 check_errno ();
5432
5433 /* call the real socket function */
962955c5 5434 s = pfn_socket (af, type, protocol);
177c0ea7 5435
480b0c5b 5436 if (s != INVALID_SOCKET)
962955c5 5437 return socket_to_fd (s);
480b0c5b 5438
962955c5
JR		 5439 set_errno ();
5440 return -1;
5441}
5442
5443/* Convert a SOCKET to a file descriptor. */
bedf4aab 5444static int
962955c5
JR		 5445socket_to_fd (SOCKET s)
5446{
5447 int fd;
5448 child_process * cp;
5449
5450 /* Although under NT 3.5 _open_osfhandle will accept a socket
5451 handle, if opened with SO_OPENTYPE == SO_SYNCHRONOUS_NONALERT,
5452 that does not work under NT 3.1. However, we can get the same
5453 effect by using a backdoor function to replace an existing
5454 descriptor handle with the one we want. */
5455
5456 /* allocate a file descriptor (with appropriate flags) */
5457 fd = _open ("NUL:", _O_RDWR);
5458 if (fd >= 0)
5459 {
962955c5
JR		 5460 /* Make a non-inheritable copy of the socket handle. Note
5461 that it is possible that sockets aren't actually kernel
5462 handles, which appears to be the case on Windows 9x when
5463 the MS Proxy winsock client is installed. */
5464 {
5465 /* Apparently there is a bug in NT 3.51 with some service
5466 packs, which prevents using DuplicateHandle to make a
5467 socket handle non-inheritable (causes WSACleanup to
5468 hang). The work-around is to use SetHandleInformation
5469 instead if it is available and implemented. */
5470 if (pfn_SetHandleInformation)
480b0c5b 5471 {
962955c5
JR		 5472 pfn_SetHandleInformation ((HANDLE) s, HANDLE_FLAG_INHERIT, 0);
5473 }
5474 else
5475 {
5476 HANDLE parent = GetCurrentProcess ();
5477 HANDLE new_s = INVALID_HANDLE_VALUE;
5478
5479 if (DuplicateHandle (parent,
5480 (HANDLE) s,
5481 parent,
5482 &new_s,
5483 0,
5484 FALSE,
5485 DUPLICATE_SAME_ACCESS))
f1614061 5486 {
962955c5
JR		 5487 /* It is possible that DuplicateHandle succeeds even
5488 though the socket wasn't really a kernel handle,
5489 because a real handle has the same value. So
5490 test whether the new handle really is a socket. */
5491 long nonblocking = 0;
5492 if (pfn_ioctlsocket ((SOCKET) new_s, FIONBIO, &nonblocking) == 0)
ca149beb 5493 {
962955c5
JR		 5494 pfn_closesocket (s);
5495 s = (SOCKET) new_s;
5496 }
5497 else
5498 {
5499 CloseHandle (new_s);
5500 }
177c0ea7 5501 }
480b0c5b 5502 }
962955c5
JR		 5503 }
5504 fd_info[fd].hnd = (HANDLE) s;
480b0c5b 5505
962955c5
JR		 5506 /* set our own internal flags */
5507 fd_info[fd].flags = FILE_SOCKET | FILE_BINARY | FILE_READ | FILE_WRITE;
480b0c5b 5508
962955c5
JR		 5509 cp = new_child ();
5510 if (cp)
5511 {
5512 cp->fd = fd;
5513 cp->status = STATUS_READ_ACKNOWLEDGED;
480b0c5b 5514
962955c5
JR		 5515 /* attach child_process to fd_info */
5516 if (fd_info[ fd ].cp != NULL)
5517 {
5518 DebPrint (("sys_socket: fd_info[%d] apparently in use!\n", fd));
1088b922 5519 emacs_abort ();
480b0c5b
GV		 5520 }
5521
962955c5
JR		 5522 fd_info[ fd ].cp = cp;
5523
5524 /* success! */
5525 winsock_inuse++; /* count open sockets */
5526 return fd;
480b0c5b 5527 }
480b0c5b 5528
962955c5
JR		 5529 /* clean up */
5530 _close (fd);
5531 }
5532 pfn_closesocket (s);
5533 h_errno = EMFILE;
480b0c5b
GV		 5534 return -1;
5535}
5536
480b0c5b
GV		 5537int
5538sys_bind (int s, const struct sockaddr * addr, int namelen)
5539{
f249a012 5540 if (winsock_lib == NULL)
480b0c5b
GV		 5541 {
5542 h_errno = ENOTSOCK;
5543 return SOCKET_ERROR;
5544 }
5545
5546 check_errno ();
5547 if (fd_info[s].flags & FILE_SOCKET)
5548 {
5549 int rc = pfn_bind (SOCK_HANDLE (s), addr, namelen);
5550 if (rc == SOCKET_ERROR)
5551 set_errno ();
5552 return rc;
5553 }
5554 h_errno = ENOTSOCK;
5555 return SOCKET_ERROR;
5556}
5557
480b0c5b
GV		 5558int
5559sys_connect (int s, const struct sockaddr * name, int namelen)
5560{
f249a012 5561 if (winsock_lib == NULL)
480b0c5b
GV		 5562 {
5563 h_errno = ENOTSOCK;
5564 return SOCKET_ERROR;
5565 }
5566
5567 check_errno ();
5568 if (fd_info[s].flags & FILE_SOCKET)
5569 {
5570 int rc = pfn_connect (SOCK_HANDLE (s), name, namelen);
5571 if (rc == SOCKET_ERROR)
5572 set_errno ();
5573 return rc;
5574 }
5575 h_errno = ENOTSOCK;
5576 return SOCKET_ERROR;
5577}
5578
5579u_short
5580sys_htons (u_short hostshort)
5581{
f249a012 5582 return (winsock_lib != NULL) ?
480b0c5b
GV		 5583 pfn_htons (hostshort) : hostshort;
5584}
5585
5586u_short
5587sys_ntohs (u_short netshort)
5588{
f249a012 5589 return (winsock_lib != NULL) ?
480b0c5b
GV		 5590 pfn_ntohs (netshort) : netshort;
5591}
5592
5593unsigned long
5594sys_inet_addr (const char * cp)
5595{
f249a012 5596 return (winsock_lib != NULL) ?
480b0c5b
GV		 5597 pfn_inet_addr (cp) : INADDR_NONE;
5598}
5599
5600int
5601sys_gethostname (char * name, int namelen)
5602{
f249a012 5603 if (winsock_lib != NULL)
480b0c5b
GV		 5604 return pfn_gethostname (name, namelen);
5605
5606 if (namelen > MAX_COMPUTERNAME_LENGTH)
a302c7ae 5607 return !GetComputerName (name, (DWORD *)&namelen);
480b0c5b
GV		 5608
5609 h_errno = EFAULT;
5610 return SOCKET_ERROR;
5611}
5612
5613struct hostent *
ed3751c8 5614sys_gethostbyname (const char * name)
480b0c5b
GV		 5615{
5616 struct hostent * host;
5617
f249a012 5618 if (winsock_lib == NULL)
480b0c5b
GV		 5619 {
5620 h_errno = ENETDOWN;
5621 return NULL;
5622 }
5623
5624 check_errno ();
5625 host = pfn_gethostbyname (name);
5626 if (!host)
5627 set_errno ();
5628 return host;
5629}
5630
5631struct servent *
ed3751c8 5632sys_getservbyname (const char * name, const char * proto)
480b0c5b
GV		 5633{
5634 struct servent * serv;
5635
f249a012 5636 if (winsock_lib == NULL)
480b0c5b
GV		 5637 {
5638 h_errno = ENETDOWN;
5639 return NULL;
5640 }
5641
5642 check_errno ();
5643 serv = pfn_getservbyname (name, proto);
5644 if (!serv)
5645 set_errno ();
5646 return serv;
5647}
5648
ecd270eb
JR		 5649int
5650sys_getpeername (int s, struct sockaddr *addr, int * namelen)
5651{
5652 if (winsock_lib == NULL)
5653 {
5654 h_errno = ENETDOWN;
5655 return SOCKET_ERROR;
5656 }
5657
5658 check_errno ();
5659 if (fd_info[s].flags & FILE_SOCKET)
5660 {
5661 int rc = pfn_getpeername (SOCK_HANDLE (s), addr, namelen);
5662 if (rc == SOCKET_ERROR)
5663 set_errno ();
5664 return rc;
5665 }
5666 h_errno = ENOTSOCK;
5667 return SOCKET_ERROR;
5668}
5669
380961a6
GV		 5670int
5671sys_shutdown (int s, int how)
5672{
380961a6
GV		 5673 if (winsock_lib == NULL)
5674 {
5675 h_errno = ENETDOWN;
5676 return SOCKET_ERROR;
5677 }
5678
5679 check_errno ();
5680 if (fd_info[s].flags & FILE_SOCKET)
5681 {
5682 int rc = pfn_shutdown (SOCK_HANDLE (s), how);
962955c5
JR		 5683 if (rc == SOCKET_ERROR)
5684 set_errno ();
5685 return rc;
5686 }
5687 h_errno = ENOTSOCK;
5688 return SOCKET_ERROR;
5689}
5690
5691int
a5a389bb 5692sys_setsockopt (int s, int level, int optname, const void * optval, int optlen)
962955c5
JR		 5693{
5694 if (winsock_lib == NULL)
5695 {
5696 h_errno = ENETDOWN;
5697 return SOCKET_ERROR;
5698 }
5699
5700 check_errno ();
5701 if (fd_info[s].flags & FILE_SOCKET)
5702 {
5703 int rc = pfn_setsockopt (SOCK_HANDLE (s), level, optname,
a5a389bb 5704 (const char *)optval, optlen);
962955c5
JR		 5705 if (rc == SOCKET_ERROR)
5706 set_errno ();
5707 return rc;
5708 }
5709 h_errno = ENOTSOCK;
177c0ea7 5710 return SOCKET_ERROR;
962955c5
JR		 5711}
5712
5713int
5714sys_listen (int s, int backlog)
5715{
5716 if (winsock_lib == NULL)
5717 {
5718 h_errno = ENETDOWN;
5719 return SOCKET_ERROR;
5720 }
5721
5722 check_errno ();
5723 if (fd_info[s].flags & FILE_SOCKET)
5724 {
5725 int rc = pfn_listen (SOCK_HANDLE (s), backlog);
5726 if (rc == SOCKET_ERROR)
5727 set_errno ();
26fb7bc4 5728 else
64570b36 5729 fd_info[s].flags |= FILE_LISTEN;
962955c5
JR		 5730 return rc;
5731 }
5732 h_errno = ENOTSOCK;
177c0ea7 5733 return SOCKET_ERROR;
962955c5
JR		 5734}
5735
5736int
5737sys_getsockname (int s, struct sockaddr * name, int * namelen)
5738{
5739 if (winsock_lib == NULL)
5740 {
5741 h_errno = ENETDOWN;
5742 return SOCKET_ERROR;
5743 }
5744
5745 check_errno ();
5746 if (fd_info[s].flags & FILE_SOCKET)
5747 {
5748 int rc = pfn_getsockname (SOCK_HANDLE (s), name, namelen);
5749 if (rc == SOCKET_ERROR)
5750 set_errno ();
5751 return rc;
5752 }
5753 h_errno = ENOTSOCK;
177c0ea7 5754 return SOCKET_ERROR;
962955c5
JR		 5755}
5756
5757int
5758sys_accept (int s, struct sockaddr * addr, int * addrlen)
5759{
5760 if (winsock_lib == NULL)
5761 {
5762 h_errno = ENETDOWN;
5763 return -1;
5764 }
5765
5766 check_errno ();
26fb7bc4 5767 if (fd_info[s].flags & FILE_LISTEN)
962955c5 5768 {
a0ad1860 5769 SOCKET t = pfn_accept (SOCK_HANDLE (s), addr, addrlen);
64570b36
KS		 5770 int fd = -1;
5771 if (t == INVALID_SOCKET)
5772 set_errno ();
5773 else
5774 fd = socket_to_fd (t);
962955c5 5775
64570b36
KS		 5776 fd_info[s].cp->status = STATUS_READ_ACKNOWLEDGED;
5777 ResetEvent (fd_info[s].cp->char_avail);
5778 return fd;
962955c5
JR		 5779 }
5780 h_errno = ENOTSOCK;
5781 return -1;
5782}
5783
5784int
5785sys_recvfrom (int s, char * buf, int len, int flags,
b56ceb92 5786 struct sockaddr * from, int * fromlen)
962955c5
JR		 5787{
5788 if (winsock_lib == NULL)
5789 {
5790 h_errno = ENETDOWN;
5791 return SOCKET_ERROR;
5792 }
5793
5794 check_errno ();
5795 if (fd_info[s].flags & FILE_SOCKET)
5796 {
5797 int rc = pfn_recvfrom (SOCK_HANDLE (s), buf, len, flags, from, fromlen);
5798 if (rc == SOCKET_ERROR)
5799 set_errno ();
5800 return rc;
5801 }
5802 h_errno = ENOTSOCK;
5803 return SOCKET_ERROR;
5804}
5805
5806int
5807sys_sendto (int s, const char * buf, int len, int flags,
5808 const struct sockaddr * to, int tolen)
5809{
5810 if (winsock_lib == NULL)
5811 {
5812 h_errno = ENETDOWN;
5813 return SOCKET_ERROR;
5814 }
5815
5816 check_errno ();
5817 if (fd_info[s].flags & FILE_SOCKET)
5818 {
5819 int rc = pfn_sendto (SOCK_HANDLE (s), buf, len, flags, to, tolen);
380961a6
GV		 5820 if (rc == SOCKET_ERROR)
5821 set_errno ();
5822 return rc;
5823 }
5824 h_errno = ENOTSOCK;
5825 return SOCKET_ERROR;
5826}
5827
ecd270eb
JR		 5828/* Windows does not have an fcntl function. Provide an implementation
5829 solely for making sockets non-blocking. */
5830int
5831fcntl (int s, int cmd, int options)
5832{
5833 if (winsock_lib == NULL)
5834 {
5835 h_errno = ENETDOWN;
5836 return -1;
5837 }
5838
5839 check_errno ();
5840 if (fd_info[s].flags & FILE_SOCKET)
5841 {
5842 if (cmd == F_SETFL && options == O_NDELAY)
5843 {
5844 unsigned long nblock = 1;
5845 int rc = pfn_ioctlsocket (SOCK_HANDLE (s), FIONBIO, &nblock);
5846 if (rc == SOCKET_ERROR)
9d4f32e8 5847 set_errno ();
ecd270eb
JR		 5848 /* Keep track of the fact that we set this to non-blocking. */
5849 fd_info[s].flags |= FILE_NDELAY;
5850 return rc;
5851 }
5852 else
5853 {
5854 h_errno = EINVAL;
5855 return SOCKET_ERROR;
5856 }
5857 }
5858 h_errno = ENOTSOCK;
5859 return SOCKET_ERROR;
5860}
5861
480b0c5b
GV		 5862
5863/* Shadow main io functions: we need to handle pipes and sockets more
5864 intelligently, and implement non-blocking mode as well. */
5865
5866int
5867sys_close (int fd)
5868{
5869 int rc;
5870
7559f399 5871 if (fd < 0)
480b0c5b
GV		 5872 {
5873 errno = EBADF;
5874 return -1;
5875 }
5876
7559f399 5877 if (fd < MAXDESC && fd_info[fd].cp)
480b0c5b
GV		 5878 {
5879 child_process * cp = fd_info[fd].cp;
5880
5881 fd_info[fd].cp = NULL;
5882
5883 if (CHILD_ACTIVE (cp))
5884 {
5885 /* if last descriptor to active child_process then cleanup */
5886 int i;
5887 for (i = 0; i < MAXDESC; i++)
5888 {
5889 if (i == fd)
5890 continue;
5891 if (fd_info[i].cp == cp)
5892 break;
5893 }
5894 if (i == MAXDESC)
5895 {
480b0c5b
GV		 5896 if (fd_info[fd].flags & FILE_SOCKET)
5897 {
1088b922 5898 if (winsock_lib == NULL) emacs_abort ();
480b0c5b
GV		 5899
5900 pfn_shutdown (SOCK_HANDLE (fd), 2);
5901 rc = pfn_closesocket (SOCK_HANDLE (fd));
7d701334 5902
f249a012 5903 winsock_inuse--; /* count open sockets */
480b0c5b 5904 }
480b0c5b
GV		 5905 delete_child (cp);
5906 }
5907 }
5908 }
5909
5910 /* Note that sockets do not need special treatment here (at least on
e9e23e23 5911 NT and Windows 95 using the standard tcp/ip stacks) - it appears that
480b0c5b
GV		 5912 closesocket is equivalent to CloseHandle, which is to be expected
5913 because socket handles are fully fledged kernel handles. */
5914 rc = _close (fd);
5915
7559f399 5916 if (rc == 0 && fd < MAXDESC)
480b0c5b
GV		 5917 fd_info[fd].flags = 0;
5918
5919 return rc;
5920}
5921
5922int
5923sys_dup (int fd)
5924{
5925 int new_fd;
5926
5927 new_fd = _dup (fd);
7559f399 5928 if (new_fd >= 0 && new_fd < MAXDESC)
480b0c5b
GV		 5929 {
5930 /* duplicate our internal info as well */
5931 fd_info[new_fd] = fd_info[fd];
5932 }
5933 return new_fd;
5934}
5935
480b0c5b
GV		 5936int
5937sys_dup2 (int src, int dst)
5938{
5939 int rc;
5940
5941 if (dst < 0 || dst >= MAXDESC)
5942 {
5943 errno = EBADF;
5944 return -1;
5945 }
5946
5947 /* make sure we close the destination first if it's a pipe or socket */
5948 if (src != dst && fd_info[dst].flags != 0)
5949 sys_close (dst);
177c0ea7 5950
480b0c5b
GV		 5951 rc = _dup2 (src, dst);
5952 if (rc == 0)
5953 {
5954 /* duplicate our internal info as well */
5955 fd_info[dst] = fd_info[src];
5956 }
5957 return rc;
5958}
5959
480b0c5b
GV		 5960/* Unix pipe() has only one arg */
5961int
5962sys_pipe (int * phandles)
5963{
5964 int rc;
5965 unsigned flags;
480b0c5b 5966
76b3903d
GV		 5967 /* make pipe handles non-inheritable; when we spawn a child, we
5968 replace the relevant handle with an inheritable one. Also put
5969 pipes into binary mode; we will do text mode translation ourselves
5970 if required. */
5971 rc = _pipe (phandles, 0, _O_NOINHERIT | _O_BINARY);
480b0c5b
GV		 5972
5973 if (rc == 0)
5974 {
cb72110d
JR		 5975 /* Protect against overflow, since Windows can open more handles than
5976 our fd_info array has room for. */
5977 if (phandles[0] >= MAXDESC || phandles[1] >= MAXDESC)
5978 {
5979 _close (phandles[0]);
5980 _close (phandles[1]);
5981 rc = -1;
5982 }
5983 else
5984 {
5985 flags = FILE_PIPE | FILE_READ | FILE_BINARY;
5986 fd_info[phandles[0]].flags = flags;
480b0c5b 5987
cb72110d
JR		 5988 flags = FILE_PIPE | FILE_WRITE | FILE_BINARY;
5989 fd_info[phandles[1]].flags = flags;
5990 }
480b0c5b
GV		 5991 }
5992
5993 return rc;
5994}
5995
5996/* Function to do blocking read of one byte, needed to implement
5997 select. It is only allowed on sockets and pipes. */
5998int
5999_sys_read_ahead (int fd)
6000{
6001 child_process * cp;
6002 int rc;
6003
6004 if (fd < 0 || fd >= MAXDESC)
6005 return STATUS_READ_ERROR;
6006
6007 cp = fd_info[fd].cp;
6008
6009 if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY)
6010 return STATUS_READ_ERROR;
6011
d888760c 6012 if ((fd_info[fd].flags & (FILE_PIPE | FILE_SERIAL | FILE_SOCKET)) == 0
480b0c5b
GV		 6013 || (fd_info[fd].flags & FILE_READ) == 0)
6014 {
d888760c 6015 DebPrint (("_sys_read_ahead: internal error: fd %d is not a pipe, serial port, or socket!\n", fd));
1088b922 6016 emacs_abort ();
480b0c5b 6017 }
177c0ea7 6018
480b0c5b 6019 cp->status = STATUS_READ_IN_PROGRESS;
177c0ea7 6020
480b0c5b 6021 if (fd_info[fd].flags & FILE_PIPE)
f7554349 6022 {
f7554349
KH		 6023 rc = _read (fd, &cp->chr, sizeof (char));
6024
6025 /* Give subprocess time to buffer some more output for us before
e9e23e23 6026 reporting that input is available; we need this because Windows 95
f7554349
KH		 6027 connects DOS programs to pipes by making the pipe appear to be
6028 the normal console stdout - as a result most DOS programs will
d888760c 6029 write to stdout without buffering, ie. one character at a
fbd6baed 6030 time. Even some W32 programs do this - "dir" in a command
f7554349
KH		 6031 shell on NT is very slow if we don't do this. */
6032 if (rc > 0)
6033 {
78806724 6034 int wait = w32_pipe_read_delay;
f7554349
KH		 6035
6036 if (wait > 0)
6037 Sleep (wait);
6038 else if (wait < 0)
6039 while (++wait <= 0)
6040 /* Yield remainder of our time slice, effectively giving a
6041 temporary priority boost to the child process. */
6042 Sleep (0);
6043 }
6044 }
d888760c
GM		 6045 else if (fd_info[fd].flags & FILE_SERIAL)
6046 {
6047 HANDLE hnd = fd_info[fd].hnd;
6048 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_read;
6049 COMMTIMEOUTS ct;
6050
6051 /* Configure timeouts for blocking read. */
6052 if (!GetCommTimeouts (hnd, &ct))
6053 return STATUS_READ_ERROR;
6054 ct.ReadIntervalTimeout = 0;
6055 ct.ReadTotalTimeoutMultiplier = 0;
6056 ct.ReadTotalTimeoutConstant = 0;
6057 if (!SetCommTimeouts (hnd, &ct))
6058 return STATUS_READ_ERROR;
6059
6060 if (!ReadFile (hnd, &cp->chr, sizeof (char), (DWORD*) &rc, ovl))
6061 {
6062 if (GetLastError () != ERROR_IO_PENDING)
6063 return STATUS_READ_ERROR;
6064 if (!GetOverlappedResult (hnd, ovl, (DWORD*) &rc, TRUE))
6065 return STATUS_READ_ERROR;
6066 }
6067 }
480b0c5b 6068 else if (fd_info[fd].flags & FILE_SOCKET)
ecd270eb
JR		 6069 {
6070 unsigned long nblock = 0;
6071 /* We always want this to block, so temporarily disable NDELAY. */
6072 if (fd_info[fd].flags & FILE_NDELAY)
6073 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
6074
6075 rc = pfn_recv (SOCK_HANDLE (fd), &cp->chr, sizeof (char), 0);
6076
6077 if (fd_info[fd].flags & FILE_NDELAY)
6078 {
6079 nblock = 1;
6080 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
6081 }
6082 }
177c0ea7 6083
480b0c5b
GV		 6084 if (rc == sizeof (char))
6085 cp->status = STATUS_READ_SUCCEEDED;
6086 else
6087 cp->status = STATUS_READ_FAILED;
6088
6089 return cp->status;
6090}
6091
9bfb11f9
KS		 6092int
6093_sys_wait_accept (int fd)
64570b36
KS		 6094{
6095 HANDLE hEv;
6096 child_process * cp;
6097 int rc;
6098
6099 if (fd < 0 || fd >= MAXDESC)
6100 return STATUS_READ_ERROR;
6101
6102 cp = fd_info[fd].cp;
6103
6104 if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY)
6105 return STATUS_READ_ERROR;
6106
6107 cp->status = STATUS_READ_FAILED;
6108
6109 hEv = pfn_WSACreateEvent ();
6110 rc = pfn_WSAEventSelect (SOCK_HANDLE (fd), hEv, FD_ACCEPT);
6111 if (rc != SOCKET_ERROR)
6112 {
6113 rc = WaitForSingleObject (hEv, INFINITE);
6114 pfn_WSAEventSelect (SOCK_HANDLE (fd), NULL, 0);
64570b36
KS		 6115 if (rc == WAIT_OBJECT_0)
6116 cp->status = STATUS_READ_SUCCEEDED;
6117 }
7046f191 6118 pfn_WSACloseEvent (hEv);
64570b36
KS		 6119
6120 return cp->status;
6121}
6122
480b0c5b
GV		 6123int
6124sys_read (int fd, char * buffer, unsigned int count)
6125{
6126 int nchars;
480b0c5b
GV		 6127 int to_read;
6128 DWORD waiting;
76b3903d 6129 char * orig_buffer = buffer;
480b0c5b 6130
7559f399 6131 if (fd < 0)
480b0c5b
GV		 6132 {
6133 errno = EBADF;
6134 return -1;
6135 }
6136
d888760c 6137 if (fd < MAXDESC && fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET | FILE_SERIAL))
480b0c5b
GV		 6138 {
6139 child_process *cp = fd_info[fd].cp;
6140
6141 if ((fd_info[fd].flags & FILE_READ) == 0)
6142 {
6143 errno = EBADF;
6144 return -1;
6145 }
6146
76b3903d
GV		 6147 nchars = 0;
6148
6149 /* re-read CR carried over from last read */
6150 if (fd_info[fd].flags & FILE_LAST_CR)
6151 {
1088b922 6152 if (fd_info[fd].flags & FILE_BINARY) emacs_abort ();
76b3903d
GV		 6153 *buffer++ = 0x0d;
6154 count--;
6155 nchars++;
f52eb3ef 6156 fd_info[fd].flags &= ~FILE_LAST_CR;
76b3903d
GV		 6157 }
6158
480b0c5b
GV		 6159 /* presence of a child_process structure means we are operating in
6160 non-blocking mode - otherwise we just call _read directly.
6161 Note that the child_process structure might be missing because
6162 reap_subprocess has been called; in this case the pipe is
6163 already broken, so calling _read on it is okay. */
6164 if (cp)
6165 {
6166 int current_status = cp->status;
6167
6168 switch (current_status)
6169 {
6170 case STATUS_READ_FAILED:
6171 case STATUS_READ_ERROR:
f52eb3ef
GV		 6172 /* report normal EOF if nothing in buffer */
6173 if (nchars <= 0)
6174 fd_info[fd].flags |= FILE_AT_EOF;
6175 return nchars;
480b0c5b
GV		 6176
6177 case STATUS_READ_READY:
6178 case STATUS_READ_IN_PROGRESS:
6179 DebPrint (("sys_read called when read is in progress\n"));
6180 errno = EWOULDBLOCK;
6181 return -1;
6182
6183 case STATUS_READ_SUCCEEDED:
6184 /* consume read-ahead char */
6185 *buffer++ = cp->chr;
6186 count--;
76b3903d 6187 nchars++;
480b0c5b
GV		 6188 cp->status = STATUS_READ_ACKNOWLEDGED;
6189 ResetEvent (cp->char_avail);
6190
6191 case STATUS_READ_ACKNOWLEDGED:
6192 break;
6193
6194 default:
6195 DebPrint (("sys_read: bad status %d\n", current_status));
6196 errno = EBADF;
6197 return -1;
6198 }
6199
6200 if (fd_info[fd].flags & FILE_PIPE)
6201 {
6202 PeekNamedPipe ((HANDLE) _get_osfhandle (fd), NULL, 0, NULL, &waiting, NULL);
6203 to_read = min (waiting, (DWORD) count);
f52eb3ef
GV		 6204
6205 if (to_read > 0)
6206 nchars += _read (fd, buffer, to_read);
480b0c5b 6207 }
d888760c
GM		 6208 else if (fd_info[fd].flags & FILE_SERIAL)
6209 {
6210 HANDLE hnd = fd_info[fd].hnd;
6211 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_read;
d888760c
GM		 6212 int rc = 0;
6213 COMMTIMEOUTS ct;
6214
6215 if (count > 0)
6216 {
6217 /* Configure timeouts for non-blocking read. */
6218 if (!GetCommTimeouts (hnd, &ct))
6219 {
6220 errno = EIO;
6221 return -1;
6222 }
6223 ct.ReadIntervalTimeout = MAXDWORD;
6224 ct.ReadTotalTimeoutMultiplier = 0;
6225 ct.ReadTotalTimeoutConstant = 0;
6226 if (!SetCommTimeouts (hnd, &ct))
6227 {
6228 errno = EIO;
6229 return -1;
6230 }
6231
6232 if (!ResetEvent (ovl->hEvent))
6233 {
6234 errno = EIO;
6235 return -1;
6236 }
6237 if (!ReadFile (hnd, buffer, count, (DWORD*) &rc, ovl))
6238 {
6239 if (GetLastError () != ERROR_IO_PENDING)
6240 {
6241 errno = EIO;
6242 return -1;
6243 }
6244 if (!GetOverlappedResult (hnd, ovl, (DWORD*) &rc, TRUE))
6245 {
6246 errno = EIO;
6247 return -1;
6248 }
6249 }
6250 nchars += rc;
6251 }
6252 }
480b0c5b
GV		 6253 else /* FILE_SOCKET */
6254 {
1088b922 6255 if (winsock_lib == NULL) emacs_abort ();
480b0c5b
GV		 6256
6257 /* do the equivalent of a non-blocking read */
6258 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONREAD, &waiting);
76b3903d 6259 if (waiting == 0 && nchars == 0)
480b0c5b
GV		 6260 {
6261 h_errno = errno = EWOULDBLOCK;
6262 return -1;
6263 }
6264
480b0c5b
GV		 6265 if (waiting)
6266 {
6267 /* always use binary mode for sockets */
76b3903d
GV		 6268 int res = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0);
6269 if (res == SOCKET_ERROR)
480b0c5b 6270 {
ed3751c8
JB		 6271 DebPrint (("sys_read.recv failed with error %d on socket %ld\n",
6272 pfn_WSAGetLastError (), SOCK_HANDLE (fd)));
76b3903d
GV		 6273 set_errno ();
6274 return -1;
480b0c5b 6275 }
76b3903d 6276 nchars += res;
480b0c5b
GV		 6277 }
6278 }
480b0c5b
GV		 6279 }
6280 else
f52eb3ef
GV		 6281 {
6282 int nread = _read (fd, buffer, count);
6283 if (nread >= 0)
6284 nchars += nread;
6285 else if (nchars == 0)
6286 nchars = nread;
6287 }
76b3903d 6288
f52eb3ef
GV		 6289 if (nchars <= 0)
6290 fd_info[fd].flags |= FILE_AT_EOF;
76b3903d 6291 /* Perform text mode translation if required. */
f52eb3ef 6292 else if ((fd_info[fd].flags & FILE_BINARY) == 0)
76b3903d
GV		 6293 {
6294 nchars = crlf_to_lf (nchars, orig_buffer);
6295 /* If buffer contains only CR, return that. To be absolutely
6296 sure we should attempt to read the next char, but in
6297 practice a CR to be followed by LF would not appear by
6298 itself in the buffer. */
6299 if (nchars > 1 && orig_buffer[nchars - 1] == 0x0d)
6300 {
6301 fd_info[fd].flags |= FILE_LAST_CR;
6302 nchars--;
6303 }
76b3903d 6304 }
480b0c5b
GV		 6305 }
6306 else
6307 nchars = _read (fd, buffer, count);
6308
76b3903d 6309 return nchars;
480b0c5b
GV		 6310}
6311
d888760c
GM		 6312/* From w32xfns.c */
6313extern HANDLE interrupt_handle;
6314
480b0c5b
GV		 6315/* For now, don't bother with a non-blocking mode */
6316int
6317sys_write (int fd, const void * buffer, unsigned int count)
6318{
6319 int nchars;
6320
7559f399 6321 if (fd < 0)
480b0c5b
GV		 6322 {
6323 errno = EBADF;
6324 return -1;
6325 }
6326
d888760c 6327 if (fd < MAXDESC && fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET | FILE_SERIAL))
76b3903d
GV		 6328 {
6329 if ((fd_info[fd].flags & FILE_WRITE) == 0)
6330 {
6331 errno = EBADF;
6332 return -1;
6333 }
6334
6335 /* Perform text mode translation if required. */
6336 if ((fd_info[fd].flags & FILE_BINARY) == 0)
6337 {
6338 char * tmpbuf = alloca (count * 2);
6339 unsigned char * src = (void *)buffer;
6340 unsigned char * dst = tmpbuf;
6341 int nbytes = count;
6342
6343 while (1)
6344 {
6345 unsigned char *next;
6346 /* copy next line or remaining bytes */
6347 next = _memccpy (dst, src, '\n', nbytes);
6348 if (next)
6349 {
6350 /* copied one line ending with '\n' */
6351 int copied = next - dst;
6352 nbytes -= copied;
6353 src += copied;
6354 /* insert '\r' before '\n' */
6355 next[-1] = '\r';
6356 next[0] = '\n';
6357 dst = next + 1;
6358 count++;
177c0ea7 6359 }
76b3903d
GV		 6360 else
6361 /* copied remaining partial line -> now finished */
6362 break;
6363 }
6364 buffer = tmpbuf;
6365 }
6366 }
6367
d888760c
GM		 6368 if (fd < MAXDESC && fd_info[fd].flags & FILE_SERIAL)
6369 {
6370 HANDLE hnd = (HANDLE) _get_osfhandle (fd);
6371 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_write;
6372 HANDLE wait_hnd[2] = { interrupt_handle, ovl->hEvent };
6373 DWORD active = 0;
6374
6375 if (!WriteFile (hnd, buffer, count, (DWORD*) &nchars, ovl))
6376 {
6377 if (GetLastError () != ERROR_IO_PENDING)
6378 {
6379 errno = EIO;
6380 return -1;
6381 }
6382 if (detect_input_pending ())
6383 active = MsgWaitForMultipleObjects (2, wait_hnd, FALSE, INFINITE,
6384 QS_ALLINPUT);
6385 else
6386 active = WaitForMultipleObjects (2, wait_hnd, FALSE, INFINITE);
6387 if (active == WAIT_OBJECT_0)
6388 { /* User pressed C-g, cancel write, then leave. Don't bother
6389 cleaning up as we may only get stuck in buggy drivers. */
6390 PurgeComm (hnd, PURGE_TXABORT | PURGE_TXCLEAR);
6391 CancelIo (hnd);
6392 errno = EIO;
6393 return -1;
6394 }
6395 if (active == WAIT_OBJECT_0 + 1
6396 && !GetOverlappedResult (hnd, ovl, (DWORD*) &nchars, TRUE))
6397 {
6398 errno = EIO;
6399 return -1;
6400 }
6401 }
6402 }
7d701334 6403 else if (fd < MAXDESC && fd_info[fd].flags & FILE_SOCKET)
480b0c5b 6404 {
30a32e0e 6405 unsigned long nblock = 0;
1088b922 6406 if (winsock_lib == NULL) emacs_abort ();
30a32e0e
JR		 6407
6408 /* TODO: implement select() properly so non-blocking I/O works. */
6409 /* For now, make sure the write blocks. */
6410 if (fd_info[fd].flags & FILE_NDELAY)
6411 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
6412
480b0c5b 6413 nchars = pfn_send (SOCK_HANDLE (fd), buffer, count, 0);
30a32e0e
JR		 6414
6415 /* Set the socket back to non-blocking if it was before,
6416 for other operations that support it. */
6417 if (fd_info[fd].flags & FILE_NDELAY)
6418 {
6419 nblock = 1;
6420 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
6421 }
6422
480b0c5b
GV		 6423 if (nchars == SOCKET_ERROR)
6424 {
ed3751c8
JB		 6425 DebPrint (("sys_write.send failed with error %d on socket %ld\n",
6426 pfn_WSAGetLastError (), SOCK_HANDLE (fd)));
480b0c5b
GV		 6427 set_errno ();
6428 }
6429 }
6430 else
6e83d800
EZ		 6431 {
6432 /* Some networked filesystems don't like too large writes, so
6433 break them into smaller chunks. See the Comments section of
6434 the MSDN documentation of WriteFile for details behind the
6435 choice of the value of CHUNK below. See also the thread
6436 http://thread.gmane.org/gmane.comp.version-control.git/145294
6437 in the git mailing list. */
6438 const unsigned char *p = buffer;
6439 const unsigned chunk = 30 * 1024 * 1024;
6440
6441 nchars = 0;
6442 while (count > 0)
6443 {
6444 unsigned this_chunk = count < chunk ? count : chunk;
6445 int n = _write (fd, p, this_chunk);
6446
6447 nchars += n;
6448 if (n < 0)
6449 {
6450 nchars = n;
6451 break;
6452 }
6453 else if (n < this_chunk)
6454 break;
6455 count -= n;
6456 p += n;
6457 }
6458 }
480b0c5b
GV		 6459
6460 return nchars;
6461}
6462
97a93095
EZ		 6463/* The Windows CRT functions are "optimized for speed", so they don't
6464 check for timezone and DST changes if they were last called less
6465 than 1 minute ago (see http://support.microsoft.com/kb/821231). So
6466 all Emacs features that repeatedly call time functions (e.g.,
6467 display-time) are in real danger of missing timezone and DST
6468 changes. Calling tzset before each localtime call fixes that. */
6469struct tm *
6470sys_localtime (const time_t *t)
6471{
6472 tzset ();
6473 return localtime (t);
6474}
6475
0898ca10
JB		 6476
6477\f
d07ff9db
CY		 6478/* Try loading LIBRARY_ID from the file(s) specified in
6479 Vdynamic_library_alist. If the library is loaded successfully,
6480 return the handle of the DLL, and record the filename in the
6481 property :loaded-from of LIBRARY_ID. If the library could not be
6482 found, or when it was already loaded (because the handle is not
6483 recorded anywhere, and so is lost after use), return NULL.
6484
6485 We could also save the handle in :loaded-from, but currently
6486 there's no use case for it. */
0898ca10 6487HMODULE
d07ff9db 6488w32_delayed_load (Lisp_Object library_id)
0898ca10
JB		 6489{
6490 HMODULE library_dll = NULL;
6491
6492 CHECK_SYMBOL (library_id);
6493
d07ff9db
CY		 6494 if (CONSP (Vdynamic_library_alist)
6495 && NILP (Fassq (library_id, Vlibrary_cache)))
0898ca10
JB		 6496 {
6497 Lisp_Object found = Qnil;
d07ff9db 6498 Lisp_Object dlls = Fassq (library_id, Vdynamic_library_alist);
0898ca10
JB		 6499
6500 if (CONSP (dlls))
6501 for (dlls = XCDR (dlls); CONSP (dlls); dlls = XCDR (dlls))
6502 {
6503 CHECK_STRING_CAR (dlls);
657d08d3 6504 if ((library_dll = LoadLibrary (SDATA (XCAR (dlls)))))
0898ca10 6505 {
2a8ce227
JB		 6506 char name[MAX_PATH];
6507 DWORD len;
6508
6509 len = GetModuleFileNameA (library_dll, name, sizeof (name));
6510 found = Fcons (XCAR (dlls),
6511 (len > 0)
6512 /* Possibly truncated */
6513 ? make_specified_string (name, -1, len, 1)
6514 : Qnil);
0898ca10
JB		 6515 break;
6516 }
6517 }
6518
6519 Fput (library_id, QCloaded_from, found);
6520 }
6521
6522 return library_dll;
6523}
6524
6525\f
76151e2c 6526void
b56ceb92 6527check_windows_init_file (void)
f52eb3ef 6528{
f52eb3ef
GV		 6529 /* A common indication that Emacs is not installed properly is when
6530 it cannot find the Windows installation file. If this file does
6531 not exist in the expected place, tell the user. */
6532
c7aa8333
EZ		 6533 if (!noninteractive && !inhibit_window_system
6534 /* Vload_path is not yet initialized when we are loading
6535 loadup.el. */
6536 && NILP (Vpurify_flag))
d54abccd 6537 {
d54abccd
GV		 6538 Lisp_Object init_file;
6539 int fd;
f52eb3ef 6540
d54abccd 6541 init_file = build_string ("term/w32-win");
76151e2c 6542 fd = openp (Vload_path, init_file, Fget_load_suffixes (), NULL, Qnil);
177c0ea7 6543 if (fd < 0)
d54abccd 6544 {
76151e2c 6545 Lisp_Object load_path_print = Fprin1_to_string (Vload_path, Qnil);
d5db4077
KR		 6546 char *init_file_name = SDATA (init_file);
6547 char *load_path = SDATA (load_path_print);
acc23b87
KS		 6548 char *buffer = alloca (1024
6549 + strlen (init_file_name)
6550 + strlen (load_path));
d54abccd 6551
177c0ea7 6552 sprintf (buffer,
d54abccd
GV		 6553 "The Emacs Windows initialization file \"%s.el\" "
6554 "could not be found in your Emacs installation. "
6555 "Emacs checked the following directories for this file:\n"
6556 "\n%s\n\n"
6557 "When Emacs cannot find this file, it usually means that it "
6558 "was not installed properly, or its distribution file was "
6559 "not unpacked properly.\nSee the README.W32 file in the "
6560 "top-level Emacs directory for more information.",
6561 init_file_name, load_path);
6562 MessageBox (NULL,
6563 buffer,
6564 "Emacs Abort Dialog",
6565 MB_OK | MB_ICONEXCLAMATION | MB_TASKMODAL);
1088b922 6566 /* Use the low-level system abort. */
d54abccd
GV		 6567 abort ();
6568 }
6569 else
6570 {
a302c7ae 6571 _close (fd);
d54abccd 6572 }
f52eb3ef 6573 }
f52eb3ef 6574}
480b0c5b
GV		 6575
6576void
16b22fef 6577term_ntproc (int ignored)
480b0c5b 6578{
16b22fef 6579 (void)ignored;
c06c382a
EZ		 6580
6581 term_timers ();
6582
480b0c5b
GV		 6583 /* shutdown the socket interface if necessary */
6584 term_winsock ();
52c7f9ee
JR		 6585
6586 term_w32select ();
480b0c5b
GV		 6587}
6588
6589void
16b22fef 6590init_ntproc (int dumping)
480b0c5b 6591{
c06c382a
EZ		 6592 sigset_t initial_mask = 0;
6593
e1dbe924 6594 /* Initialize the socket interface now if available and requested by
f249a012 6595 the user by defining PRELOAD_WINSOCK; otherwise loading will be
fbd6baed 6596 delayed until open-network-stream is called (w32-has-winsock can
f249a012
RS		 6597 also be used to dynamically load or reload winsock).
6598
6599 Conveniently, init_environment is called before us, so
6600 PRELOAD_WINSOCK can be set in the registry. */
6601
6602 /* Always initialize this correctly. */
6603 winsock_lib = NULL;
6604
6605 if (getenv ("PRELOAD_WINSOCK") != NULL)
6606 init_winsock (TRUE);
480b0c5b
GV		 6607
6608 /* Initial preparation for subprocess support: replace our standard
6609 handles with non-inheritable versions. */
6610 {
6611 HANDLE parent;
6612 HANDLE stdin_save = INVALID_HANDLE_VALUE;
6613 HANDLE stdout_save = INVALID_HANDLE_VALUE;
6614 HANDLE stderr_save = INVALID_HANDLE_VALUE;
6615
6616 parent = GetCurrentProcess ();
6617
6618 /* ignore errors when duplicating and closing; typically the
6619 handles will be invalid when running as a gui program. */
177c0ea7
JB		 6620 DuplicateHandle (parent,
6621 GetStdHandle (STD_INPUT_HANDLE),
480b0c5b 6622 parent,
177c0ea7
JB		 6623 &stdin_save,
6624 0,
6625 FALSE,
480b0c5b 6626 DUPLICATE_SAME_ACCESS);
177c0ea7 6627
480b0c5b
GV		 6628 DuplicateHandle (parent,
6629 GetStdHandle (STD_OUTPUT_HANDLE),
6630 parent,
6631 &stdout_save,
6632 0,
6633 FALSE,
6634 DUPLICATE_SAME_ACCESS);
177c0ea7 6635
480b0c5b
GV		 6636 DuplicateHandle (parent,
6637 GetStdHandle (STD_ERROR_HANDLE),
6638 parent,
6639 &stderr_save,
6640 0,
6641 FALSE,
6642 DUPLICATE_SAME_ACCESS);
177c0ea7 6643
480b0c5b
GV		 6644 fclose (stdin);
6645 fclose (stdout);
6646 fclose (stderr);
6647
6648 if (stdin_save != INVALID_HANDLE_VALUE)
62aba0d4 6649 _open_osfhandle ((intptr_t) stdin_save, O_TEXT);
480b0c5b 6650 else
76b3903d
GV		 6651 _open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY);
6652 _fdopen (0, "r");
480b0c5b
GV		 6653
6654 if (stdout_save != INVALID_HANDLE_VALUE)
62aba0d4 6655 _open_osfhandle ((intptr_t) stdout_save, O_TEXT);
480b0c5b 6656 else
76b3903d
GV		 6657 _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY);
6658 _fdopen (1, "w");
480b0c5b
GV		 6659
6660 if (stderr_save != INVALID_HANDLE_VALUE)
62aba0d4 6661 _open_osfhandle ((intptr_t) stderr_save, O_TEXT);
480b0c5b 6662 else
76b3903d
GV		 6663 _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY);
6664 _fdopen (2, "w");
480b0c5b
GV		 6665 }
6666
6667 /* unfortunately, atexit depends on implementation of malloc */
6668 /* atexit (term_ntproc); */
16b22fef 6669 if (!dumping)
c06c382a
EZ		 6670 {
6671 /* Make sure we start with all signals unblocked. */
6672 sigprocmask (SIG_SETMASK, &initial_mask, NULL);
6673 signal (SIGABRT, term_ntproc);
6674 }
6675 init_timers ();
76b3903d
GV		 6676
6677 /* determine which drives are fixed, for GetCachedVolumeInformation */
6678 {
6679 /* GetDriveType must have trailing backslash. */
6680 char drive[] = "A:\\";
6681
6682 /* Loop over all possible drive letters */
6683 while (*drive <= 'Z')
6684 {
6685 /* Record if this drive letter refers to a fixed drive. */
177c0ea7 6686 fixed_drives[DRIVE_INDEX (*drive)] =
76b3903d
GV		 6687 (GetDriveType (drive) == DRIVE_FIXED);
6688
6689 (*drive)++;
6690 }
a302c7ae
AI		 6691
6692 /* Reset the volume info cache. */
6693 volume_cache = NULL;
76b3903d 6694 }
480b0c5b
GV		 6695}
6696
a8c3a596
JR		 6697/*
6698 shutdown_handler ensures that buffers' autosave files are
6699 up to date when the user logs off, or the system shuts down.
6700*/
bedf4aab 6701static BOOL WINAPI
ed3751c8 6702shutdown_handler (DWORD type)
a8c3a596
JR		 6703{
6704 /* Ctrl-C and Ctrl-Break are already suppressed, so don't handle them. */
6705 if (type == CTRL_CLOSE_EVENT /* User closes console window. */
6706 || type == CTRL_LOGOFF_EVENT /* User logs off. */
6707 || type == CTRL_SHUTDOWN_EVENT) /* User shutsdown. */
6708 {
6709 /* Shut down cleanly, making sure autosave files are up to date. */
1882aa38 6710 shut_down_emacs (0, Qnil);
a8c3a596
JR		 6711 }
6712
7046f191 6713 /* Allow other handlers to handle this signal. */
a8c3a596
JR		 6714 return FALSE;
6715}
6716
9785d95b
BK		 6717/*
6718 globals_of_w32 is used to initialize those global variables that
6719 must always be initialized on startup even when the global variable
6720 initialized is non zero (see the function main in emacs.c).
6721*/
9bfb11f9 6722void
b56ceb92 6723globals_of_w32 (void)
9785d95b 6724{
74258518
JR		 6725 HMODULE kernel32 = GetModuleHandle ("kernel32.dll");
6726
6727 get_process_times_fn = (GetProcessTimes_Proc)
6728 GetProcAddress (kernel32, "GetProcessTimes");
6729
cd3520a4 6730 DEFSYM (QCloaded_from, ":loaded-from");
0898ca10 6731
9785d95b
BK		 6732 g_b_init_is_windows_9x = 0;
6733 g_b_init_open_process_token = 0;
6734 g_b_init_get_token_information = 0;
6735 g_b_init_lookup_account_sid = 0;
9d95a291
EZ		 6736 g_b_init_get_sid_sub_authority = 0;
6737 g_b_init_get_sid_sub_authority_count = 0;
6dad7178 6738 g_b_init_get_security_info = 0;
8aaaec6b
EZ		 6739 g_b_init_get_file_security = 0;
6740 g_b_init_get_security_descriptor_owner = 0;
6741 g_b_init_get_security_descriptor_group = 0;
6742 g_b_init_is_valid_sid = 0;
7c80d5ec
EZ		 6743 g_b_init_create_toolhelp32_snapshot = 0;
6744 g_b_init_process32_first = 0;
6745 g_b_init_process32_next = 0;
6746 g_b_init_open_thread_token = 0;
6747 g_b_init_impersonate_self = 0;
6748 g_b_init_revert_to_self = 0;
6749 g_b_init_get_process_memory_info = 0;
6750 g_b_init_get_process_working_set_size = 0;
6751 g_b_init_global_memory_status = 0;
6752 g_b_init_global_memory_status_ex = 0;
f8b35b24
EZ		 6753 g_b_init_equal_sid = 0;
6754 g_b_init_copy_sid = 0;
6755 g_b_init_get_length_sid = 0;
ad9e2d54
EZ		 6756 g_b_init_get_native_system_info = 0;
6757 g_b_init_get_system_times = 0;
6dad7178 6758 g_b_init_create_symbolic_link = 0;
ad9e2d54 6759 num_of_processors = 0;
a8c3a596
JR		 6760 /* The following sets a handler for shutdown notifications for
6761 console apps. This actually applies to Emacs in both console and
6762 GUI modes, since we had to fool windows into thinking emacs is a
6763 console application to get console mode to work. */
ed3751c8 6764 SetConsoleCtrlHandler (shutdown_handler, TRUE);
8aaaec6b
EZ		 6765
6766 /* "None" is the default group name on standalone workstations. */
6767 strcpy (dflt_group_name, "None");
9785d95b
BK		 6768}
6769
d888760c 6770/* For make-serial-process */
b56ceb92
JB		 6771int
6772serial_open (char *port)
d888760c
GM		 6773{
6774 HANDLE hnd;
6775 child_process *cp;
6776 int fd = -1;
6777
6778 hnd = CreateFile (port, GENERIC_READ | GENERIC_WRITE, 0, 0,
6779 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
6780 if (hnd == INVALID_HANDLE_VALUE)
6781 error ("Could not open %s", port);
62aba0d4 6782 fd = (int) _open_osfhandle ((intptr_t) hnd, 0);
d888760c
GM		 6783 if (fd == -1)
6784 error ("Could not open %s", port);
6785
6786 cp = new_child ();
6787 if (!cp)
6788 error ("Could not create child process");
6789 cp->fd = fd;
6790 cp->status = STATUS_READ_ACKNOWLEDGED;
6791 fd_info[ fd ].hnd = hnd;
6792 fd_info[ fd ].flags |=
6793 FILE_READ | FILE_WRITE | FILE_BINARY | FILE_SERIAL;
6794 if (fd_info[ fd ].cp != NULL)
6795 {
6796 error ("fd_info[fd = %d] is already in use", fd);
6797 }
6798 fd_info[ fd ].cp = cp;
6799 cp->ovl_read.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL);
6800 if (cp->ovl_read.hEvent == NULL)
6801 error ("Could not create read event");
6802 cp->ovl_write.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL);
6803 if (cp->ovl_write.hEvent == NULL)
6804 error ("Could not create write event");
6805
6806 return fd;
6807}
6808
6809/* For serial-process-configure */
6810void
9d4f32e8 6811serial_configure (struct Lisp_Process *p, Lisp_Object contact)
d888760c
GM		 6812{
6813 Lisp_Object childp2 = Qnil;
6814 Lisp_Object tem = Qnil;
6815 HANDLE hnd;
6816 DCB dcb;
6817 COMMTIMEOUTS ct;
6818 char summary[4] = "???"; /* This usually becomes "8N1". */
6819
6820 if ((fd_info[ p->outfd ].flags & FILE_SERIAL) == 0)
6821 error ("Not a serial process");
6822 hnd = fd_info[ p->outfd ].hnd;
6823
4d2b044c 6824 childp2 = Fcopy_sequence (p->childp);
d888760c
GM		 6825
6826 /* Initialize timeouts for blocking read and blocking write. */
6827 if (!GetCommTimeouts (hnd, &ct))
6828 error ("GetCommTimeouts() failed");
6829 ct.ReadIntervalTimeout = 0;
6830 ct.ReadTotalTimeoutMultiplier = 0;
6831 ct.ReadTotalTimeoutConstant = 0;
6832 ct.WriteTotalTimeoutMultiplier = 0;
6833 ct.WriteTotalTimeoutConstant = 0;
6834 if (!SetCommTimeouts (hnd, &ct))
6835 error ("SetCommTimeouts() failed");
6836 /* Read port attributes and prepare default configuration. */
6837 memset (&dcb, 0, sizeof (dcb));
6838 dcb.DCBlength = sizeof (DCB);
6839 if (!GetCommState (hnd, &dcb))
6840 error ("GetCommState() failed");
6841 dcb.fBinary = TRUE;
6842 dcb.fNull = FALSE;
6843 dcb.fAbortOnError = FALSE;
6844 /* dcb.XonLim and dcb.XoffLim are set by GetCommState() */
6845 dcb.ErrorChar = 0;
6846 dcb.EofChar = 0;
6847 dcb.EvtChar = 0;
6848
6849 /* Configure speed. */
6850 if (!NILP (Fplist_member (contact, QCspeed)))
6851 tem = Fplist_get (contact, QCspeed);
6852 else
4d2b044c 6853 tem = Fplist_get (p->childp, QCspeed);
d888760c
GM		 6854 CHECK_NUMBER (tem);
6855 dcb.BaudRate = XINT (tem);
6856 childp2 = Fplist_put (childp2, QCspeed, tem);
6857
6858 /* Configure bytesize. */
6859 if (!NILP (Fplist_member (contact, QCbytesize)))
6860 tem = Fplist_get (contact, QCbytesize);
6861 else
4d2b044c 6862 tem = Fplist_get (p->childp, QCbytesize);
d888760c
GM		 6863 if (NILP (tem))
6864 tem = make_number (8);
6865 CHECK_NUMBER (tem);
6866 if (XINT (tem) != 7 && XINT (tem) != 8)
6867 error (":bytesize must be nil (8), 7, or 8");
6868 dcb.ByteSize = XINT (tem);
6869 summary[0] = XINT (tem) + '0';
6870 childp2 = Fplist_put (childp2, QCbytesize, tem);
6871
6872 /* Configure parity. */
6873 if (!NILP (Fplist_member (contact, QCparity)))
6874 tem = Fplist_get (contact, QCparity);
6875 else
4d2b044c 6876 tem = Fplist_get (p->childp, QCparity);
d888760c
GM		 6877 if (!NILP (tem) && !EQ (tem, Qeven) && !EQ (tem, Qodd))
6878 error (":parity must be nil (no parity), `even', or `odd'");
6879 dcb.fParity = FALSE;
6880 dcb.Parity = NOPARITY;
6881 dcb.fErrorChar = FALSE;
6882 if (NILP (tem))
6883 {
6884 summary[1] = 'N';
6885 }
6886 else if (EQ (tem, Qeven))
6887 {
6888 summary[1] = 'E';
6889 dcb.fParity = TRUE;
6890 dcb.Parity = EVENPARITY;
6891 dcb.fErrorChar = TRUE;
6892 }
6893 else if (EQ (tem, Qodd))
6894 {
6895 summary[1] = 'O';
6896 dcb.fParity = TRUE;
6897 dcb.Parity = ODDPARITY;
6898 dcb.fErrorChar = TRUE;
6899 }
6900 childp2 = Fplist_put (childp2, QCparity, tem);
6901
6902 /* Configure stopbits. */
6903 if (!NILP (Fplist_member (contact, QCstopbits)))
6904 tem = Fplist_get (contact, QCstopbits);
6905 else
4d2b044c 6906 tem = Fplist_get (p->childp, QCstopbits);
d888760c
GM		 6907 if (NILP (tem))
6908 tem = make_number (1);
6909 CHECK_NUMBER (tem);
6910 if (XINT (tem) != 1 && XINT (tem) != 2)
6911 error (":stopbits must be nil (1 stopbit), 1, or 2");
6912 summary[2] = XINT (tem) + '0';
6913 if (XINT (tem) == 1)
6914 dcb.StopBits = ONESTOPBIT;
6915 else if (XINT (tem) == 2)
6916 dcb.StopBits = TWOSTOPBITS;
6917 childp2 = Fplist_put (childp2, QCstopbits, tem);
6918
6919 /* Configure flowcontrol. */
6920 if (!NILP (Fplist_member (contact, QCflowcontrol)))
6921 tem = Fplist_get (contact, QCflowcontrol);
6922 else
4d2b044c 6923 tem = Fplist_get (p->childp, QCflowcontrol);
d888760c
GM		 6924 if (!NILP (tem) && !EQ (tem, Qhw) && !EQ (tem, Qsw))
6925 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
6926 dcb.fOutxCtsFlow = FALSE;
6927 dcb.fOutxDsrFlow = FALSE;
6928 dcb.fDtrControl = DTR_CONTROL_DISABLE;
6929 dcb.fDsrSensitivity = FALSE;
6930 dcb.fTXContinueOnXoff = FALSE;
6931 dcb.fOutX = FALSE;
6932 dcb.fInX = FALSE;
6933 dcb.fRtsControl = RTS_CONTROL_DISABLE;
6934 dcb.XonChar = 17; /* Control-Q */
6935 dcb.XoffChar = 19; /* Control-S */
6936 if (NILP (tem))
6937 {
6938 /* Already configured. */
6939 }
6940 else if (EQ (tem, Qhw))
6941 {
6942 dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
6943 dcb.fOutxCtsFlow = TRUE;
6944 }
6945 else if (EQ (tem, Qsw))
6946 {
6947 dcb.fOutX = TRUE;
6948 dcb.fInX = TRUE;
6949 }
6950 childp2 = Fplist_put (childp2, QCflowcontrol, tem);
6951
6952 /* Activate configuration. */
6953 if (!SetCommState (hnd, &dcb))
6954 error ("SetCommState() failed");
6955
6956 childp2 = Fplist_put (childp2, QCsummary, build_string (summary));
6a09a33b 6957 pset_childp (p, childp2);
d888760c
GM		 6958}
6959
e061a11b
TZ		 6960#ifdef HAVE_GNUTLS
6961
6962ssize_t
6963emacs_gnutls_pull (gnutls_transport_ptr_t p, void* buf, size_t sz)
6964{
6965 int n, sc, err;
6966 SELECT_TYPE fdset;
a68089e4 6967 EMACS_TIME timeout;
e061a11b
TZ		 6968 struct Lisp_Process *process = (struct Lisp_Process *)p;
6969 int fd = process->infd;
6970
6971 for (;;)
6972 {
5e617bc2 6973 n = sys_read (fd, (char*)buf, sz);
e061a11b
TZ		 6974
6975 if (n >= 0)
6976 return n;
6977
6978 err = errno;
6979
6980 if (err == EWOULDBLOCK)
6981 {
6982 /* Set a small timeout. */
a68089e4 6983 timeout = make_emacs_time (1, 0);
e061a11b
TZ		 6984 FD_ZERO (&fdset);
6985 FD_SET ((int)fd, &fdset);
6986
6987 /* Use select with the timeout to poll the selector. */
6988 sc = select (fd + 1, &fdset, (SELECT_TYPE *)0, (SELECT_TYPE *)0,
c9240d7a 6989 &timeout, NULL);
e061a11b
TZ		 6990
6991 if (sc > 0)
6992 continue; /* Try again. */
6993
6994 /* Translate the WSAEWOULDBLOCK alias EWOULDBLOCK to EAGAIN.
6995 Also accept select return 0 as an indicator to EAGAIN. */
6996 if (sc == 0 || errno == EWOULDBLOCK)
6997 err = EAGAIN;
6998 else
6999 err = errno; /* Other errors are just passed on. */
7000 }
7001
0898ca10 7002 emacs_gnutls_transport_set_errno (process->gnutls_state, err);
e061a11b
TZ		 7003
7004 return -1;
7005 }
7006}
ab5796a9 7007
e061a11b
TZ		 7008ssize_t
7009emacs_gnutls_push (gnutls_transport_ptr_t p, const void* buf, size_t sz)
7010{
7011 struct Lisp_Process *process = (struct Lisp_Process *)p;
42ce4c63 7012 int fd = process->outfd;
5e617bc2 7013 ssize_t n = sys_write (fd, buf, sz);
e061a11b
TZ		 7014
7015 /* 0 or more bytes written means everything went fine. */
7016 if (n >= 0)
7017 return n;
7018
7019 /* Negative bytes written means we got an error in errno.
7020 Translate the WSAEWOULDBLOCK alias EWOULDBLOCK to EAGAIN. */
0898ca10
JB		 7021 emacs_gnutls_transport_set_errno (process->gnutls_state,
7022 errno == EWOULDBLOCK ? EAGAIN : errno);
e061a11b
TZ		 7023
7024 return -1;
7025}
7026#endif /* HAVE_GNUTLS */
7027
7028/* end of w32.c */
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