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Update instructions in nt/INSTALL.MSYS.
[bpt/emacs.git] / src / w32.c
CommitLineData
b46a6a83 1/* Utility and Unix shadow routines for GNU Emacs on the Microsoft Windows API.
ab422c4d 2 Copyright (C) 1994-1995, 2000-2013 Free Software Foundation, Inc.
95ed0025 3
3b7ad313
EN		 4This file is part of GNU Emacs.
5
9ec0b715 6GNU Emacs is free software: you can redistribute it and/or modify
3b7ad313 7it under the terms of the GNU General Public License as published by
9ec0b715
GM		 8the Free Software Foundation, either version 3 of the License, or
9(at your option) any later version.
3b7ad313
EN		 10
11GNU Emacs is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
9ec0b715 17along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
95ed0025 18
9ec0b715 19/*
95ed0025
RS		 20 Geoff Voelker (voelker@cs.washington.edu) 7-29-94
21*/
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>
8f5e14c8 32#include <time.h> /* must be before nt/inc/sys/time.h, for MinGW64 */
480b0c5b 33#include <sys/time.h>
16bb7578 34#include <sys/utime.h>
7c80d5ec 35#include <math.h>
480b0c5b
GV		 36
37/* must include CRT headers *before* config.h */
4838e624 38
4838e624 39#include <config.h>
6ee4509a 40#include <mbstring.h> /* for _mbspbrk, _mbslwr, _mbsrchr, ... */
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"
7d9fb4de 68#include "epaths.h" /* for SHELL */
95ed0025
RS		 69
70#include <pwd.h>
3d19b645 71#include <grp.h>
95ed0025 72
a18d7de6
EZ		 73/* MinGW64 (_W64) defines these in its _mingw.h. */
74#if defined(__GNUC__) && !defined(_W64)
971bce75
AI		 75#define _ANONYMOUS_UNION
76#define _ANONYMOUS_STRUCT
77#endif
480b0c5b 78#include <windows.h>
b8526f6e
EZ		 79/* Some versions of compiler define MEMORYSTATUSEX, some don't, so we
80 use a different name to avoid compilation problems. */
81typedef struct _MEMORY_STATUS_EX {
bedf4aab
JB		 82 DWORD dwLength;
83 DWORD dwMemoryLoad;
84 DWORDLONG ullTotalPhys;
85 DWORDLONG ullAvailPhys;
86 DWORDLONG ullTotalPageFile;
87 DWORDLONG ullAvailPageFile;
88 DWORDLONG ullTotalVirtual;
89 DWORDLONG ullAvailVirtual;
90 DWORDLONG ullAvailExtendedVirtual;
b8526f6e 91} MEMORY_STATUS_EX,*LPMEMORY_STATUS_EX;
7c80d5ec 92
634d3003 93#include <lmcons.h>
2d5324c5 94#include <shlobj.h>
00b3b7b3 95
7c80d5ec
EZ		 96#include <tlhelp32.h>
97#include <psapi.h>
a6fc3b5c 98#ifndef _MSC_VER
69e847be 99#include <w32api.h>
a6fc3b5c 100#endif
a18d7de6 101#if _WIN32_WINNT < 0x0500
5e617bc2 102#if !defined (__MINGW32__) || __W32API_MAJOR_VERSION < 3 || (__W32API_MAJOR_VERSION == 3 && __W32API_MINOR_VERSION < 15)
7c80d5ec 103/* This either is not in psapi.h or guarded by higher value of
a6d3e72e 104 _WIN32_WINNT than what we use. w32api supplied with MinGW 3.15
69e847be 105 defines it in psapi.h */
7c80d5ec 106typedef struct _PROCESS_MEMORY_COUNTERS_EX {
cb576b5c
FP		 107 DWORD cb;
108 DWORD PageFaultCount;
109 SIZE_T PeakWorkingSetSize;
110 SIZE_T WorkingSetSize;
111 SIZE_T QuotaPeakPagedPoolUsage;
112 SIZE_T QuotaPagedPoolUsage;
113 SIZE_T QuotaPeakNonPagedPoolUsage;
114 SIZE_T QuotaNonPagedPoolUsage;
115 SIZE_T PagefileUsage;
116 SIZE_T PeakPagefileUsage;
117 SIZE_T PrivateUsage;
7c80d5ec 118} PROCESS_MEMORY_COUNTERS_EX,*PPROCESS_MEMORY_COUNTERS_EX;
69e847be 119#endif
a18d7de6 120#endif
7c80d5ec 121
6dad7178
EZ		 122#include <winioctl.h>
123#include <aclapi.h>
66447e07
EZ		 124#include <sddl.h>
125
126#include <sys/acl.h>
127
128/* This is not in MinGW's sddl.h (but they are in MSVC headers), so we
129 define them by hand if not already defined. */
130#ifndef SDDL_REVISION_1
131#define SDDL_REVISION_1 1
132#endif /* SDDL_REVISION_1 */
6dad7178 133
c6e72e17
EZ		 134#if defined(_MSC_VER) || defined(_W64)
135/* MSVC and MinGW64 don't provide the definition of
136 REPARSE_DATA_BUFFER and the associated macros, except on ntifs.h,
137 which cannot be included because it triggers conflicts with other
138 Windows API headers. So we define it here by hand. */
6dad7178
EZ		 139
140typedef struct _REPARSE_DATA_BUFFER {
141 ULONG ReparseTag;
142 USHORT ReparseDataLength;
143 USHORT Reserved;
144 union {
145 struct {
146 USHORT SubstituteNameOffset;
147 USHORT SubstituteNameLength;
148 USHORT PrintNameOffset;
149 USHORT PrintNameLength;
150 ULONG Flags;
151 WCHAR PathBuffer[1];
152 } SymbolicLinkReparseBuffer;
153 struct {
154 USHORT SubstituteNameOffset;
155 USHORT SubstituteNameLength;
156 USHORT PrintNameOffset;
157 USHORT PrintNameLength;
158 WCHAR PathBuffer[1];
159 } MountPointReparseBuffer;
160 struct {
161 UCHAR DataBuffer[1];
162 } GenericReparseBuffer;
163 } DUMMYUNIONNAME;
164} REPARSE_DATA_BUFFER, *PREPARSE_DATA_BUFFER;
165
c7b36b95 166#ifndef FILE_DEVICE_FILE_SYSTEM
88c4a13c 167#define FILE_DEVICE_FILE_SYSTEM 9
c7b36b95
FP		 168#endif
169#ifndef METHOD_BUFFERED
88c4a13c 170#define METHOD_BUFFERED 0
c7b36b95
FP		 171#endif
172#ifndef FILE_ANY_ACCESS
88c4a13c 173#define FILE_ANY_ACCESS 0x00000000
c7b36b95
FP		 174#endif
175#ifndef CTL_CODE
88c4a13c 176#define CTL_CODE(t,f,m,a) (((t)<<16)|((a)<<14)|((f)<<2)|(m))
c7b36b95 177#endif
c86f791f
EZ		 178/* MinGW64 defines FSCTL_GET_REPARSE_POINT on winioctl.h. */
179#ifndef FSCTL_GET_REPARSE_POINT
88c4a13c
EZ		 180#define FSCTL_GET_REPARSE_POINT \
181 CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 42, METHOD_BUFFERED, FILE_ANY_ACCESS)
6dad7178 182#endif
c86f791f 183#endif
6dad7178 184
7d701334 185/* TCP connection support. */
480b0c5b
GV		 186#include <sys/socket.h>
187#undef socket
188#undef bind
189#undef connect
190#undef htons
191#undef ntohs
192#undef inet_addr
193#undef gethostname
194#undef gethostbyname
195#undef getservbyname
ecd270eb 196#undef getpeername
380961a6 197#undef shutdown
962955c5
JR		 198#undef setsockopt
199#undef listen
200#undef getsockname
201#undef accept
202#undef recvfrom
203#undef sendto
00b3b7b3 204
489f9371 205#include "w32.h"
95ef7787 206#include <dirent.h>
501199a3 207#include "w32common.h"
489f9371 208#include "w32heap.h"
a68089e4 209#include "w32select.h"
253574a6 210#include "systime.h"
f481eb31 211#include "dispextern.h" /* for xstrcasecmp */
7c80d5ec 212#include "coding.h" /* for Vlocale_coding_system */
253574a6 213
973f782d
EZ		 214#include "careadlinkat.h"
215#include "allocator.h"
216
1eb8fd91 217/* For serial_configure and serial_open. */
d888760c 218#include "process.h"
d888760c 219
2d5324c5
JR		 220typedef HRESULT (WINAPI * ShGetFolderPath_fn)
221 (IN HWND, IN int, IN HANDLE, IN DWORD, OUT char *);
222
0898ca10
JB		 223Lisp_Object QCloaded_from;
224
b56ceb92 225void globals_of_w32 (void);
8aaaec6b 226static DWORD get_rid (PSID);
6dad7178
EZ		 227static int is_symlink (const char *);
228static char * chase_symlinks (const char *);
229static int enable_privilege (LPCTSTR, BOOL, TOKEN_PRIVILEGES *);
230static int restore_privilege (TOKEN_PRIVILEGES *);
231static BOOL WINAPI revert_to_self (void);
9785d95b 232
a68089e4
EZ		 233extern int sys_access (const char *, int);
234extern void *e_malloc (size_t);
235extern int sys_select (int, SELECT_TYPE *, SELECT_TYPE *, SELECT_TYPE *,
236 EMACS_TIME *, void *);
237
238
18e070ac 239\f
9d95a291
EZ		 240/* Initialization states.
241
242 WARNING: If you add any more such variables for additional APIs,
243 you MUST add initialization for them to globals_of_w32
244 below. This is because these variables might get set
245 to non-NULL values during dumping, but the dumped Emacs
246 cannot reuse those values, because it could be run on a
247 different version of the OS, where API addresses are
248 different. */
9785d95b
BK		 249static BOOL g_b_init_is_windows_9x;
250static BOOL g_b_init_open_process_token;
251static BOOL g_b_init_get_token_information;
252static BOOL g_b_init_lookup_account_sid;
c617afce
EZ		 253static BOOL g_b_init_get_sid_sub_authority;
254static BOOL g_b_init_get_sid_sub_authority_count;
6dad7178 255static BOOL g_b_init_get_security_info;
8aaaec6b
EZ		 256static BOOL g_b_init_get_file_security;
257static BOOL g_b_init_get_security_descriptor_owner;
258static BOOL g_b_init_get_security_descriptor_group;
259static BOOL g_b_init_is_valid_sid;
7c80d5ec
EZ		 260static BOOL g_b_init_create_toolhelp32_snapshot;
261static BOOL g_b_init_process32_first;
262static BOOL g_b_init_process32_next;
263static BOOL g_b_init_open_thread_token;
264static BOOL g_b_init_impersonate_self;
265static BOOL g_b_init_revert_to_self;
266static BOOL g_b_init_get_process_memory_info;
267static BOOL g_b_init_get_process_working_set_size;
268static BOOL g_b_init_global_memory_status;
269static BOOL g_b_init_global_memory_status_ex;
f8b35b24
EZ		 270static BOOL g_b_init_get_length_sid;
271static BOOL g_b_init_equal_sid;
272static BOOL g_b_init_copy_sid;
ad9e2d54
EZ		 273static BOOL g_b_init_get_native_system_info;
274static BOOL g_b_init_get_system_times;
6dad7178 275static BOOL g_b_init_create_symbolic_link;
66447e07
EZ		 276static BOOL g_b_init_get_security_descriptor_dacl;
277static BOOL g_b_init_convert_sd_to_sddl;
278static BOOL g_b_init_convert_sddl_to_sd;
279static BOOL g_b_init_is_valid_security_descriptor;
280static BOOL g_b_init_set_file_security;
9785d95b 281
f60ae425
BK		 282/*
283 BEGIN: Wrapper functions around OpenProcessToken
284 and other functions in advapi32.dll that are only
285 supported in Windows NT / 2k / XP
286*/
287 /* ** Function pointer typedefs ** */
288typedef BOOL (WINAPI * OpenProcessToken_Proc) (
289 HANDLE ProcessHandle,
290 DWORD DesiredAccess,
291 PHANDLE TokenHandle);
292typedef BOOL (WINAPI * GetTokenInformation_Proc) (
293 HANDLE TokenHandle,
294 TOKEN_INFORMATION_CLASS TokenInformationClass,
295 LPVOID TokenInformation,
296 DWORD TokenInformationLength,
297 PDWORD ReturnLength);
74258518
JR		 298typedef BOOL (WINAPI * GetProcessTimes_Proc) (
299 HANDLE process_handle,
300 LPFILETIME creation_time,
301 LPFILETIME exit_time,
302 LPFILETIME kernel_time,
303 LPFILETIME user_time);
304
305GetProcessTimes_Proc get_process_times_fn = NULL;
306
f60ae425
BK		 307#ifdef _UNICODE
308const char * const LookupAccountSid_Name = "LookupAccountSidW";
8aaaec6b 309const char * const GetFileSecurity_Name = "GetFileSecurityW";
66447e07 310const char * const SetFileSecurity_Name = "SetFileSecurityW";
f60ae425
BK		 311#else
312const char * const LookupAccountSid_Name = "LookupAccountSidA";
8aaaec6b 313const char * const GetFileSecurity_Name = "GetFileSecurityA";
66447e07 314const char * const SetFileSecurity_Name = "SetFileSecurityA";
f60ae425
BK		 315#endif
316typedef BOOL (WINAPI * LookupAccountSid_Proc) (
317 LPCTSTR lpSystemName,
318 PSID Sid,
319 LPTSTR Name,
320 LPDWORD cbName,
321 LPTSTR DomainName,
322 LPDWORD cbDomainName,
323 PSID_NAME_USE peUse);
c617afce
EZ		 324typedef PDWORD (WINAPI * GetSidSubAuthority_Proc) (
325 PSID pSid,
326 DWORD n);
327typedef PUCHAR (WINAPI * GetSidSubAuthorityCount_Proc) (
328 PSID pSid);
6dad7178
EZ		 329typedef DWORD (WINAPI * GetSecurityInfo_Proc) (
330 HANDLE handle,
331 SE_OBJECT_TYPE ObjectType,
332 SECURITY_INFORMATION SecurityInfo,
333 PSID *ppsidOwner,
334 PSID *ppsidGroup,
335 PACL *ppDacl,
336 PACL *ppSacl,
337 PSECURITY_DESCRIPTOR *ppSecurityDescriptor);
8aaaec6b
EZ		 338typedef BOOL (WINAPI * GetFileSecurity_Proc) (
339 LPCTSTR lpFileName,
340 SECURITY_INFORMATION RequestedInformation,
341 PSECURITY_DESCRIPTOR pSecurityDescriptor,
342 DWORD nLength,
343 LPDWORD lpnLengthNeeded);
66447e07
EZ		 344typedef BOOL (WINAPI *SetFileSecurity_Proc) (
345 LPCTSTR lpFileName,
346 SECURITY_INFORMATION SecurityInformation,
347 PSECURITY_DESCRIPTOR pSecurityDescriptor);
8aaaec6b
EZ		 348typedef BOOL (WINAPI * GetSecurityDescriptorOwner_Proc) (
349 PSECURITY_DESCRIPTOR pSecurityDescriptor,
350 PSID *pOwner,
351 LPBOOL lpbOwnerDefaulted);
352typedef BOOL (WINAPI * GetSecurityDescriptorGroup_Proc) (
353 PSECURITY_DESCRIPTOR pSecurityDescriptor,
354 PSID *pGroup,
355 LPBOOL lpbGroupDefaulted);
66447e07
EZ		 356typedef BOOL (WINAPI *GetSecurityDescriptorDacl_Proc) (
357 PSECURITY_DESCRIPTOR pSecurityDescriptor,
358 LPBOOL lpbDaclPresent,
359 PACL *pDacl,
360 LPBOOL lpbDaclDefaulted);
8aaaec6b
EZ		 361typedef BOOL (WINAPI * IsValidSid_Proc) (
362 PSID sid);
7c80d5ec
EZ		 363typedef HANDLE (WINAPI * CreateToolhelp32Snapshot_Proc) (
364 DWORD dwFlags,
365 DWORD th32ProcessID);
366typedef BOOL (WINAPI * Process32First_Proc) (
367 HANDLE hSnapshot,
368 LPPROCESSENTRY32 lppe);
369typedef BOOL (WINAPI * Process32Next_Proc) (
370 HANDLE hSnapshot,
371 LPPROCESSENTRY32 lppe);
372typedef BOOL (WINAPI * OpenThreadToken_Proc) (
373 HANDLE ThreadHandle,
374 DWORD DesiredAccess,
375 BOOL OpenAsSelf,
376 PHANDLE TokenHandle);
377typedef BOOL (WINAPI * ImpersonateSelf_Proc) (
378 SECURITY_IMPERSONATION_LEVEL ImpersonationLevel);
379typedef BOOL (WINAPI * RevertToSelf_Proc) (void);
380typedef BOOL (WINAPI * GetProcessMemoryInfo_Proc) (
381 HANDLE Process,
382 PPROCESS_MEMORY_COUNTERS ppsmemCounters,
383 DWORD cb);
384typedef BOOL (WINAPI * GetProcessWorkingSetSize_Proc) (
385 HANDLE hProcess,
cb576b5c
FP		 386 PSIZE_T lpMinimumWorkingSetSize,
387 PSIZE_T lpMaximumWorkingSetSize);
7c80d5ec
EZ		 388typedef BOOL (WINAPI * GlobalMemoryStatus_Proc) (
389 LPMEMORYSTATUS lpBuffer);
390typedef BOOL (WINAPI * GlobalMemoryStatusEx_Proc) (
b8526f6e 391 LPMEMORY_STATUS_EX lpBuffer);
f8b35b24
EZ		 392typedef BOOL (WINAPI * CopySid_Proc) (
393 DWORD nDestinationSidLength,
394 PSID pDestinationSid,
395 PSID pSourceSid);
396typedef BOOL (WINAPI * EqualSid_Proc) (
397 PSID pSid1,
398 PSID pSid2);
399typedef DWORD (WINAPI * GetLengthSid_Proc) (
400 PSID pSid);
ad9e2d54
EZ		 401typedef void (WINAPI * GetNativeSystemInfo_Proc) (
402 LPSYSTEM_INFO lpSystemInfo);
403typedef BOOL (WINAPI * GetSystemTimes_Proc) (
404 LPFILETIME lpIdleTime,
405 LPFILETIME lpKernelTime,
406 LPFILETIME lpUserTime);
6dad7178
EZ		 407typedef BOOLEAN (WINAPI *CreateSymbolicLink_Proc) (
408 LPTSTR lpSymlinkFileName,
409 LPTSTR lpTargetFileName,
410 DWORD dwFlags);
66447e07
EZ		 411typedef BOOL (WINAPI *ConvertStringSecurityDescriptorToSecurityDescriptor_Proc) (
412 LPCTSTR StringSecurityDescriptor,
413 DWORD StringSDRevision,
414 PSECURITY_DESCRIPTOR *SecurityDescriptor,
415 PULONG SecurityDescriptorSize);
416typedef BOOL (WINAPI *ConvertSecurityDescriptorToStringSecurityDescriptor_Proc) (
417 PSECURITY_DESCRIPTOR SecurityDescriptor,
418 DWORD RequestedStringSDRevision,
419 SECURITY_INFORMATION SecurityInformation,
420 LPTSTR *StringSecurityDescriptor,
421 PULONG StringSecurityDescriptorLen);
422typedef BOOL (WINAPI *IsValidSecurityDescriptor_Proc) (PSECURITY_DESCRIPTOR);
f8b35b24 423
f60ae425 424 /* ** A utility function ** */
9bfb11f9 425static BOOL
b56ceb92 426is_windows_9x (void)
f60ae425 427{
bedf4aab 428 static BOOL s_b_ret = 0;
f60ae425 429 OSVERSIONINFO os_ver;
9785d95b 430 if (g_b_init_is_windows_9x == 0)
f60ae425 431 {
9785d95b 432 g_b_init_is_windows_9x = 1;
ed3751c8
JB		 433 ZeroMemory (&os_ver, sizeof (OSVERSIONINFO));
434 os_ver.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
9785d95b
BK		 435 if (GetVersionEx (&os_ver))
436 {
437 s_b_ret = (os_ver.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS);
438 }
f60ae425 439 }
9785d95b 440 return s_b_ret;
f60ae425
BK		 441}
442
d35af63c
PE		 443static Lisp_Object ltime (ULONGLONG);
444
74258518 445/* Get total user and system times for get-internal-run-time.
d35af63c 446 Returns a list of integers if the times are provided by the OS
74258518
JR		 447 (NT derivatives), otherwise it returns the result of current-time. */
448Lisp_Object
b56ceb92 449w32_get_internal_run_time (void)
74258518
JR		 450{
451 if (get_process_times_fn)
452 {
453 FILETIME create, exit, kernel, user;
ed3751c8 454 HANDLE proc = GetCurrentProcess ();
74258518
JR		 455 if ((*get_process_times_fn) (proc, &create, &exit, &kernel, &user))
456 {
457 LARGE_INTEGER user_int, kernel_int, total;
74258518
JR		 458 user_int.LowPart = user.dwLowDateTime;
459 user_int.HighPart = user.dwHighDateTime;
460 kernel_int.LowPart = kernel.dwLowDateTime;
461 kernel_int.HighPart = kernel.dwHighDateTime;
462 total.QuadPart = user_int.QuadPart + kernel_int.QuadPart;
d35af63c 463 return ltime (total.QuadPart);
74258518
JR		 464 }
465 }
466
467 return Fcurrent_time ();
468}
469
f60ae425
BK		 470 /* ** The wrapper functions ** */
471
bedf4aab
JB		 472static BOOL WINAPI
473open_process_token (HANDLE ProcessHandle,
474 DWORD DesiredAccess,
475 PHANDLE TokenHandle)
f60ae425 476{
9785d95b 477 static OpenProcessToken_Proc s_pfn_Open_Process_Token = NULL;
f60ae425
BK		 478 HMODULE hm_advapi32 = NULL;
479 if (is_windows_9x () == TRUE)
480 {
481 return FALSE;
482 }
9785d95b
BK		 483 if (g_b_init_open_process_token == 0)
484 {
485 g_b_init_open_process_token = 1;
486 hm_advapi32 = LoadLibrary ("Advapi32.dll");
487 s_pfn_Open_Process_Token =
488 (OpenProcessToken_Proc) GetProcAddress (hm_advapi32, "OpenProcessToken");
489 }
490 if (s_pfn_Open_Process_Token == NULL)
f60ae425
BK		 491 {
492 return FALSE;
493 }
494 return (
9785d95b 495 s_pfn_Open_Process_Token (
f60ae425
BK		 496 ProcessHandle,
497 DesiredAccess,
498 TokenHandle)
499 );
500}
501
bedf4aab
JB		 502static BOOL WINAPI
503get_token_information (HANDLE TokenHandle,
504 TOKEN_INFORMATION_CLASS TokenInformationClass,
505 LPVOID TokenInformation,
506 DWORD TokenInformationLength,
507 PDWORD ReturnLength)
f60ae425 508{
9785d95b 509 static GetTokenInformation_Proc s_pfn_Get_Token_Information = NULL;
f60ae425
BK		 510 HMODULE hm_advapi32 = NULL;
511 if (is_windows_9x () == TRUE)
512 {
513 return FALSE;
514 }
9785d95b
BK		 515 if (g_b_init_get_token_information == 0)
516 {
517 g_b_init_get_token_information = 1;
518 hm_advapi32 = LoadLibrary ("Advapi32.dll");
519 s_pfn_Get_Token_Information =
520 (GetTokenInformation_Proc) GetProcAddress (hm_advapi32, "GetTokenInformation");
521 }
522 if (s_pfn_Get_Token_Information == NULL)
f60ae425
BK		 523 {
524 return FALSE;
525 }
526 return (
9785d95b 527 s_pfn_Get_Token_Information (
f60ae425
BK		 528 TokenHandle,
529 TokenInformationClass,
530 TokenInformation,
531 TokenInformationLength,
532 ReturnLength)
533 );
534}
535
bedf4aab
JB		 536static BOOL WINAPI
537lookup_account_sid (LPCTSTR lpSystemName,
538 PSID Sid,
539 LPTSTR Name,
540 LPDWORD cbName,
541 LPTSTR DomainName,
542 LPDWORD cbDomainName,
543 PSID_NAME_USE peUse)
f60ae425 544{
9785d95b 545 static LookupAccountSid_Proc s_pfn_Lookup_Account_Sid = NULL;
f60ae425
BK		 546 HMODULE hm_advapi32 = NULL;
547 if (is_windows_9x () == TRUE)
548 {
549 return FALSE;
550 }
9785d95b
BK		 551 if (g_b_init_lookup_account_sid == 0)
552 {
553 g_b_init_lookup_account_sid = 1;
554 hm_advapi32 = LoadLibrary ("Advapi32.dll");
555 s_pfn_Lookup_Account_Sid =
556 (LookupAccountSid_Proc) GetProcAddress (hm_advapi32, LookupAccountSid_Name);
557 }
558 if (s_pfn_Lookup_Account_Sid == NULL)
f60ae425
BK		 559 {
560 return FALSE;
561 }
562 return (
9785d95b 563 s_pfn_Lookup_Account_Sid (
f60ae425
BK		 564 lpSystemName,
565 Sid,
566 Name,
567 cbName,
568 DomainName,
569 cbDomainName,
570 peUse)
571 );
572}
573
bedf4aab
JB		 574static PDWORD WINAPI
575get_sid_sub_authority (PSID pSid, DWORD n)
c617afce
EZ		 576{
577 static GetSidSubAuthority_Proc s_pfn_Get_Sid_Sub_Authority = NULL;
6811b9f4 578 static DWORD zero = 0U;
c617afce
EZ		 579 HMODULE hm_advapi32 = NULL;
580 if (is_windows_9x () == TRUE)
581 {
6811b9f4 582 return &zero;
c617afce
EZ		 583 }
584 if (g_b_init_get_sid_sub_authority == 0)
585 {
586 g_b_init_get_sid_sub_authority = 1;
587 hm_advapi32 = LoadLibrary ("Advapi32.dll");
588 s_pfn_Get_Sid_Sub_Authority =
589 (GetSidSubAuthority_Proc) GetProcAddress (
590 hm_advapi32, "GetSidSubAuthority");
591 }
592 if (s_pfn_Get_Sid_Sub_Authority == NULL)
593 {
6811b9f4 594 return &zero;
c617afce
EZ		 595 }
596 return (s_pfn_Get_Sid_Sub_Authority (pSid, n));
597}
598
bedf4aab
JB		 599static PUCHAR WINAPI
600get_sid_sub_authority_count (PSID pSid)
c617afce
EZ		 601{
602 static GetSidSubAuthorityCount_Proc s_pfn_Get_Sid_Sub_Authority_Count = NULL;
6811b9f4 603 static UCHAR zero = 0U;
c617afce
EZ		 604 HMODULE hm_advapi32 = NULL;
605 if (is_windows_9x () == TRUE)
606 {
6811b9f4 607 return &zero;
c617afce
EZ		 608 }
609 if (g_b_init_get_sid_sub_authority_count == 0)
610 {
611 g_b_init_get_sid_sub_authority_count = 1;
612 hm_advapi32 = LoadLibrary ("Advapi32.dll");
613 s_pfn_Get_Sid_Sub_Authority_Count =
614 (GetSidSubAuthorityCount_Proc) GetProcAddress (
615 hm_advapi32, "GetSidSubAuthorityCount");
616 }
617 if (s_pfn_Get_Sid_Sub_Authority_Count == NULL)
618 {
6811b9f4 619 return &zero;
c617afce
EZ		 620 }
621 return (s_pfn_Get_Sid_Sub_Authority_Count (pSid));
622}
623
6dad7178
EZ		 624static DWORD WINAPI
625get_security_info (HANDLE handle,
626 SE_OBJECT_TYPE ObjectType,
627 SECURITY_INFORMATION SecurityInfo,
628 PSID *ppsidOwner,
629 PSID *ppsidGroup,
630 PACL *ppDacl,
631 PACL *ppSacl,
632 PSECURITY_DESCRIPTOR *ppSecurityDescriptor)
633{
634 static GetSecurityInfo_Proc s_pfn_Get_Security_Info = NULL;
635 HMODULE hm_advapi32 = NULL;
636 if (is_windows_9x () == TRUE)
637 {
638 return FALSE;
639 }
640 if (g_b_init_get_security_info == 0)
641 {
642 g_b_init_get_security_info = 1;
643 hm_advapi32 = LoadLibrary ("Advapi32.dll");
644 s_pfn_Get_Security_Info =
645 (GetSecurityInfo_Proc) GetProcAddress (
646 hm_advapi32, "GetSecurityInfo");
647 }
648 if (s_pfn_Get_Security_Info == NULL)
649 {
650 return FALSE;
651 }
652 return (s_pfn_Get_Security_Info (handle, ObjectType, SecurityInfo,
653 ppsidOwner, ppsidGroup, ppDacl, ppSacl,
654 ppSecurityDescriptor));
655}
656
bedf4aab
JB		 657static BOOL WINAPI
658get_file_security (LPCTSTR lpFileName,
659 SECURITY_INFORMATION RequestedInformation,
660 PSECURITY_DESCRIPTOR pSecurityDescriptor,
661 DWORD nLength,
662 LPDWORD lpnLengthNeeded)
8aaaec6b
EZ		 663{
664 static GetFileSecurity_Proc s_pfn_Get_File_Security = NULL;
665 HMODULE hm_advapi32 = NULL;
666 if (is_windows_9x () == TRUE)
667 {
66447e07 668 errno = ENOTSUP;
8aaaec6b
EZ		 669 return FALSE;
670 }
671 if (g_b_init_get_file_security == 0)
672 {
673 g_b_init_get_file_security = 1;
674 hm_advapi32 = LoadLibrary ("Advapi32.dll");
675 s_pfn_Get_File_Security =
676 (GetFileSecurity_Proc) GetProcAddress (
677 hm_advapi32, GetFileSecurity_Name);
678 }
679 if (s_pfn_Get_File_Security == NULL)
680 {
66447e07 681 errno = ENOTSUP;
8aaaec6b
EZ		 682 return FALSE;
683 }
684 return (s_pfn_Get_File_Security (lpFileName, RequestedInformation,
685 pSecurityDescriptor, nLength,
686 lpnLengthNeeded));
687}
688
66447e07
EZ		 689static BOOL WINAPI
690set_file_security (LPCTSTR lpFileName,
691 SECURITY_INFORMATION SecurityInformation,
692 PSECURITY_DESCRIPTOR pSecurityDescriptor)
693{
694 static SetFileSecurity_Proc s_pfn_Set_File_Security = NULL;
695 HMODULE hm_advapi32 = NULL;
696 if (is_windows_9x () == TRUE)
697 {
698 errno = ENOTSUP;
699 return FALSE;
700 }
701 if (g_b_init_set_file_security == 0)
702 {
703 g_b_init_set_file_security = 1;
704 hm_advapi32 = LoadLibrary ("Advapi32.dll");
705 s_pfn_Set_File_Security =
706 (SetFileSecurity_Proc) GetProcAddress (
707 hm_advapi32, SetFileSecurity_Name);
708 }
709 if (s_pfn_Set_File_Security == NULL)
710 {
711 errno = ENOTSUP;
712 return FALSE;
713 }
714 return (s_pfn_Set_File_Security (lpFileName, SecurityInformation,
715 pSecurityDescriptor));
716}
717
bedf4aab
JB		 718static BOOL WINAPI
719get_security_descriptor_owner (PSECURITY_DESCRIPTOR pSecurityDescriptor,
720 PSID *pOwner,
721 LPBOOL lpbOwnerDefaulted)
8aaaec6b
EZ		 722{
723 static GetSecurityDescriptorOwner_Proc s_pfn_Get_Security_Descriptor_Owner = NULL;
724 HMODULE hm_advapi32 = NULL;
725 if (is_windows_9x () == TRUE)
726 {
66447e07 727 errno = ENOTSUP;
8aaaec6b
EZ		 728 return FALSE;
729 }
730 if (g_b_init_get_security_descriptor_owner == 0)
731 {
732 g_b_init_get_security_descriptor_owner = 1;
733 hm_advapi32 = LoadLibrary ("Advapi32.dll");
734 s_pfn_Get_Security_Descriptor_Owner =
735 (GetSecurityDescriptorOwner_Proc) GetProcAddress (
736 hm_advapi32, "GetSecurityDescriptorOwner");
737 }
738 if (s_pfn_Get_Security_Descriptor_Owner == NULL)
739 {
66447e07 740 errno = ENOTSUP;
8aaaec6b
EZ		 741 return FALSE;
742 }
743 return (s_pfn_Get_Security_Descriptor_Owner (pSecurityDescriptor, pOwner,
744 lpbOwnerDefaulted));
745}
746
bedf4aab
JB		 747static BOOL WINAPI
748get_security_descriptor_group (PSECURITY_DESCRIPTOR pSecurityDescriptor,
749 PSID *pGroup,
750 LPBOOL lpbGroupDefaulted)
8aaaec6b
EZ		 751{
752 static GetSecurityDescriptorGroup_Proc s_pfn_Get_Security_Descriptor_Group = NULL;
753 HMODULE hm_advapi32 = NULL;
754 if (is_windows_9x () == TRUE)
755 {
66447e07 756 errno = ENOTSUP;
8aaaec6b
EZ		 757 return FALSE;
758 }
759 if (g_b_init_get_security_descriptor_group == 0)
760 {
761 g_b_init_get_security_descriptor_group = 1;
762 hm_advapi32 = LoadLibrary ("Advapi32.dll");
763 s_pfn_Get_Security_Descriptor_Group =
764 (GetSecurityDescriptorGroup_Proc) GetProcAddress (
765 hm_advapi32, "GetSecurityDescriptorGroup");
766 }
767 if (s_pfn_Get_Security_Descriptor_Group == NULL)
768 {
66447e07 769 errno = ENOTSUP;
8aaaec6b
EZ		 770 return FALSE;
771 }
772 return (s_pfn_Get_Security_Descriptor_Group (pSecurityDescriptor, pGroup,
773 lpbGroupDefaulted));
774}
775
66447e07
EZ		 776static BOOL WINAPI
777get_security_descriptor_dacl (PSECURITY_DESCRIPTOR pSecurityDescriptor,
778 LPBOOL lpbDaclPresent,
779 PACL *pDacl,
780 LPBOOL lpbDaclDefaulted)
781{
782 static GetSecurityDescriptorDacl_Proc s_pfn_Get_Security_Descriptor_Dacl = NULL;
783 HMODULE hm_advapi32 = NULL;
784 if (is_windows_9x () == TRUE)
785 {
786 errno = ENOTSUP;
787 return FALSE;
788 }
789 if (g_b_init_get_security_descriptor_dacl == 0)
790 {
791 g_b_init_get_security_descriptor_dacl = 1;
792 hm_advapi32 = LoadLibrary ("Advapi32.dll");
793 s_pfn_Get_Security_Descriptor_Dacl =
794 (GetSecurityDescriptorDacl_Proc) GetProcAddress (
795 hm_advapi32, "GetSecurityDescriptorDacl");
796 }
797 if (s_pfn_Get_Security_Descriptor_Dacl == NULL)
798 {
799 errno = ENOTSUP;
800 return FALSE;
801 }
802 return (s_pfn_Get_Security_Descriptor_Dacl (pSecurityDescriptor,
803 lpbDaclPresent, pDacl,
804 lpbDaclDefaulted));
805}
806
bedf4aab
JB		 807static BOOL WINAPI
808is_valid_sid (PSID sid)
8aaaec6b
EZ		 809{
810 static IsValidSid_Proc s_pfn_Is_Valid_Sid = NULL;
811 HMODULE hm_advapi32 = NULL;
812 if (is_windows_9x () == TRUE)
813 {
814 return FALSE;
815 }
816 if (g_b_init_is_valid_sid == 0)
817 {
818 g_b_init_is_valid_sid = 1;
819 hm_advapi32 = LoadLibrary ("Advapi32.dll");
820 s_pfn_Is_Valid_Sid =
821 (IsValidSid_Proc) GetProcAddress (
822 hm_advapi32, "IsValidSid");
823 }
824 if (s_pfn_Is_Valid_Sid == NULL)
825 {
826 return FALSE;
827 }
828 return (s_pfn_Is_Valid_Sid (sid));
829}
830
bedf4aab
JB		 831static BOOL WINAPI
832equal_sid (PSID sid1, PSID sid2)
f8b35b24
EZ		 833{
834 static EqualSid_Proc s_pfn_Equal_Sid = NULL;
835 HMODULE hm_advapi32 = NULL;
836 if (is_windows_9x () == TRUE)
837 {
838 return FALSE;
839 }
840 if (g_b_init_equal_sid == 0)
841 {
842 g_b_init_equal_sid = 1;
843 hm_advapi32 = LoadLibrary ("Advapi32.dll");
844 s_pfn_Equal_Sid =
845 (EqualSid_Proc) GetProcAddress (
846 hm_advapi32, "EqualSid");
847 }
848 if (s_pfn_Equal_Sid == NULL)
849 {
850 return FALSE;
851 }
852 return (s_pfn_Equal_Sid (sid1, sid2));
853}
854
bedf4aab
JB		 855static DWORD WINAPI
856get_length_sid (PSID sid)
f8b35b24
EZ		 857{
858 static GetLengthSid_Proc s_pfn_Get_Length_Sid = NULL;
859 HMODULE hm_advapi32 = NULL;
860 if (is_windows_9x () == TRUE)
861 {
862 return 0;
863 }
864 if (g_b_init_get_length_sid == 0)
865 {
866 g_b_init_get_length_sid = 1;
867 hm_advapi32 = LoadLibrary ("Advapi32.dll");
868 s_pfn_Get_Length_Sid =
869 (GetLengthSid_Proc) GetProcAddress (
870 hm_advapi32, "GetLengthSid");
871 }
872 if (s_pfn_Get_Length_Sid == NULL)
873 {
874 return 0;
875 }
876 return (s_pfn_Get_Length_Sid (sid));
877}
878
bedf4aab
JB		 879static BOOL WINAPI
880copy_sid (DWORD destlen, PSID dest, PSID src)
f8b35b24
EZ		 881{
882 static CopySid_Proc s_pfn_Copy_Sid = NULL;
883 HMODULE hm_advapi32 = NULL;
884 if (is_windows_9x () == TRUE)
885 {
886 return FALSE;
887 }
888 if (g_b_init_copy_sid == 0)
889 {
890 g_b_init_copy_sid = 1;
891 hm_advapi32 = LoadLibrary ("Advapi32.dll");
892 s_pfn_Copy_Sid =
893 (CopySid_Proc) GetProcAddress (
894 hm_advapi32, "CopySid");
895 }
896 if (s_pfn_Copy_Sid == NULL)
897 {
898 return FALSE;
899 }
900 return (s_pfn_Copy_Sid (destlen, dest, src));
901}
902
f60ae425
BK		 903/*
904 END: Wrapper functions around OpenProcessToken
905 and other functions in advapi32.dll that are only
906 supported in Windows NT / 2k / XP
907*/
908
bedf4aab
JB		 909static void WINAPI
910get_native_system_info (LPSYSTEM_INFO lpSystemInfo)
ad9e2d54
EZ		 911{
912 static GetNativeSystemInfo_Proc s_pfn_Get_Native_System_Info = NULL;
913 if (is_windows_9x () != TRUE)
914 {
915 if (g_b_init_get_native_system_info == 0)
916 {
917 g_b_init_get_native_system_info = 1;
918 s_pfn_Get_Native_System_Info =
919 (GetNativeSystemInfo_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
920 "GetNativeSystemInfo");
921 }
922 if (s_pfn_Get_Native_System_Info != NULL)
923 s_pfn_Get_Native_System_Info (lpSystemInfo);
924 }
925 else
926 lpSystemInfo->dwNumberOfProcessors = -1;
927}
928
bedf4aab
JB		 929static BOOL WINAPI
930get_system_times (LPFILETIME lpIdleTime,
931 LPFILETIME lpKernelTime,
932 LPFILETIME lpUserTime)
ad9e2d54
EZ		 933{
934 static GetSystemTimes_Proc s_pfn_Get_System_times = NULL;
935 if (is_windows_9x () == TRUE)
936 {
937 return FALSE;
938 }
939 if (g_b_init_get_system_times == 0)
940 {
941 g_b_init_get_system_times = 1;
942 s_pfn_Get_System_times =
943 (GetSystemTimes_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
944 "GetSystemTimes");
945 }
946 if (s_pfn_Get_System_times == NULL)
947 return FALSE;
948 return (s_pfn_Get_System_times (lpIdleTime, lpKernelTime, lpUserTime));
949}
6dad7178
EZ		 950
951static BOOLEAN WINAPI
952create_symbolic_link (LPTSTR lpSymlinkFilename,
953 LPTSTR lpTargetFileName,
954 DWORD dwFlags)
955{
956 static CreateSymbolicLink_Proc s_pfn_Create_Symbolic_Link = NULL;
957 BOOLEAN retval;
958
959 if (is_windows_9x () == TRUE)
960 {
961 errno = ENOSYS;
962 return 0;
963 }
964 if (g_b_init_create_symbolic_link == 0)
965 {
966 g_b_init_create_symbolic_link = 1;
967#ifdef _UNICODE
968 s_pfn_Create_Symbolic_Link =
969 (CreateSymbolicLink_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
970 "CreateSymbolicLinkW");
971#else
972 s_pfn_Create_Symbolic_Link =
973 (CreateSymbolicLink_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
974 "CreateSymbolicLinkA");
975#endif
976 }
977 if (s_pfn_Create_Symbolic_Link == NULL)
978 {
979 errno = ENOSYS;
980 return 0;
981 }
982
983 retval = s_pfn_Create_Symbolic_Link (lpSymlinkFilename, lpTargetFileName,
984 dwFlags);
985 /* If we were denied creation of the symlink, try again after
986 enabling the SeCreateSymbolicLinkPrivilege for our process. */
987 if (!retval)
988 {
989 TOKEN_PRIVILEGES priv_current;
990
991 if (enable_privilege (SE_CREATE_SYMBOLIC_LINK_NAME, TRUE, &priv_current))
992 {
993 retval = s_pfn_Create_Symbolic_Link (lpSymlinkFilename, lpTargetFileName,
994 dwFlags);
995 restore_privilege (&priv_current);
996 revert_to_self ();
997 }
998 }
999 return retval;
1000}
66447e07
EZ		 1001
1002static BOOL WINAPI
1003is_valid_security_descriptor (PSECURITY_DESCRIPTOR pSecurityDescriptor)
1004{
1005 static IsValidSecurityDescriptor_Proc s_pfn_Is_Valid_Security_Descriptor_Proc = NULL;
1006
1007 if (is_windows_9x () == TRUE)
1008 {
1009 errno = ENOTSUP;
1010 return FALSE;
1011 }
1012
1013 if (g_b_init_is_valid_security_descriptor == 0)
1014 {
1015 g_b_init_is_valid_security_descriptor = 1;
1016 s_pfn_Is_Valid_Security_Descriptor_Proc =
1017 (IsValidSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1018 "IsValidSecurityDescriptor");
1019 }
1020 if (s_pfn_Is_Valid_Security_Descriptor_Proc == NULL)
1021 {
1022 errno = ENOTSUP;
1023 return FALSE;
1024 }
1025
1026 return s_pfn_Is_Valid_Security_Descriptor_Proc (pSecurityDescriptor);
1027}
1028
1029static BOOL WINAPI
1030convert_sd_to_sddl (PSECURITY_DESCRIPTOR SecurityDescriptor,
1031 DWORD RequestedStringSDRevision,
1032 SECURITY_INFORMATION SecurityInformation,
1033 LPTSTR *StringSecurityDescriptor,
1034 PULONG StringSecurityDescriptorLen)
1035{
1036 static ConvertSecurityDescriptorToStringSecurityDescriptor_Proc s_pfn_Convert_SD_To_SDDL = NULL;
1037 BOOL retval;
1038
1039 if (is_windows_9x () == TRUE)
1040 {
1041 errno = ENOTSUP;
1042 return FALSE;
1043 }
1044
1045 if (g_b_init_convert_sd_to_sddl == 0)
1046 {
1047 g_b_init_convert_sd_to_sddl = 1;
1048#ifdef _UNICODE
1049 s_pfn_Convert_SD_To_SDDL =
1050 (ConvertSecurityDescriptorToStringSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1051 "ConvertSecurityDescriptorToStringSecurityDescriptorW");
1052#else
1053 s_pfn_Convert_SD_To_SDDL =
1054 (ConvertSecurityDescriptorToStringSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1055 "ConvertSecurityDescriptorToStringSecurityDescriptorA");
1056#endif
1057 }
1058 if (s_pfn_Convert_SD_To_SDDL == NULL)
1059 {
1060 errno = ENOTSUP;
1061 return FALSE;
1062 }
1063
1064 retval = s_pfn_Convert_SD_To_SDDL (SecurityDescriptor,
1065 RequestedStringSDRevision,
1066 SecurityInformation,
1067 StringSecurityDescriptor,
1068 StringSecurityDescriptorLen);
1069
1070 return retval;
1071}
1072
1073static BOOL WINAPI
1074convert_sddl_to_sd (LPCTSTR StringSecurityDescriptor,
1075 DWORD StringSDRevision,
1076 PSECURITY_DESCRIPTOR *SecurityDescriptor,
1077 PULONG SecurityDescriptorSize)
1078{
1079 static ConvertStringSecurityDescriptorToSecurityDescriptor_Proc s_pfn_Convert_SDDL_To_SD = NULL;
1080 BOOL retval;
1081
1082 if (is_windows_9x () == TRUE)
1083 {
1084 errno = ENOTSUP;
1085 return FALSE;
1086 }
1087
1088 if (g_b_init_convert_sddl_to_sd == 0)
1089 {
1090 g_b_init_convert_sddl_to_sd = 1;
1091#ifdef _UNICODE
1092 s_pfn_Convert_SDDL_To_SD =
1093 (ConvertStringSecurityDescriptorToSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1094 "ConvertStringSecurityDescriptorToSecurityDescriptorW");
1095#else
1096 s_pfn_Convert_SDDL_To_SD =
1097 (ConvertStringSecurityDescriptorToSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1098 "ConvertStringSecurityDescriptorToSecurityDescriptorA");
1099#endif
1100 }
1101 if (s_pfn_Convert_SDDL_To_SD == NULL)
1102 {
1103 errno = ENOTSUP;
1104 return FALSE;
1105 }
1106
1107 retval = s_pfn_Convert_SDDL_To_SD (StringSecurityDescriptor,
1108 StringSDRevision,
1109 SecurityDescriptor,
1110 SecurityDescriptorSize);
1111
1112 return retval;
1113}
1114
f60ae425 1115\f
18e070ac 1116
ed91b2ad
EZ		 1117/* Return 1 if P is a valid pointer to an object of size SIZE. Return
1118 0 if P is NOT a valid pointer. Return -1 if we cannot validate P.
1119
1120 This is called from alloc.c:valid_pointer_p. */
1121int
1122w32_valid_pointer_p (void *p, int size)
1123{
1124 SIZE_T done;
1125 HANDLE h = OpenProcess (PROCESS_VM_READ, FALSE, GetCurrentProcessId ());
1126
1127 if (h)
1128 {
1129 unsigned char *buf = alloca (size);
1130 int retval = ReadProcessMemory (h, p, buf, size, &done);
1131
1132 CloseHandle (h);
1133 return retval;
1134 }
1135 else
1136 return -1;
1137}
1138
76b3903d 1139static char startup_dir[MAXPATHLEN];
00b3b7b3 1140
95ed0025 1141/* Get the current working directory. */
480b0c5b 1142char *
ec84768f 1143getcwd (char *dir, int dirsize)
95ed0025 1144{
9239d970
PE		 1145 if (!dirsize)
1146 {
1147 errno = EINVAL;
1148 return NULL;
1149 }
1150 if (dirsize <= strlen (startup_dir))
1151 {
1152 errno = ERANGE;
1153 return NULL;
1154 }
76b3903d 1155#if 0
480b0c5b
GV		 1156 if (GetCurrentDirectory (MAXPATHLEN, dir) > 0)
1157 return dir;
1158 return NULL;
76b3903d 1159#else
8d38f461
EZ		 1160 /* Emacs doesn't actually change directory itself, it stays in the
1161 same directory where it was started. */
76b3903d
GV		 1162 strcpy (dir, startup_dir);
1163 return dir;
1164#endif
95ed0025
RS		 1165}
1166
95ed0025 1167/* Emulate getloadavg. */
ad9e2d54
EZ		 1168
1169struct load_sample {
1170 time_t sample_time;
1171 ULONGLONG idle;
1172 ULONGLONG kernel;
1173 ULONGLONG user;
1174};
1175
1176/* Number of processors on this machine. */
1177static unsigned num_of_processors;
1178
1179/* We maintain 1-sec samples for the last 16 minutes in a circular buffer. */
1180static struct load_sample samples[16*60];
1181static int first_idx = -1, last_idx = -1;
1182static int max_idx = sizeof (samples) / sizeof (samples[0]);
1183
1184static int
1185buf_next (int from)
1186{
1187 int next_idx = from + 1;
1188
1189 if (next_idx >= max_idx)
1190 next_idx = 0;
1191
1192 return next_idx;
1193}
1194
1195static int
1196buf_prev (int from)
1197{
1198 int prev_idx = from - 1;
1199
1200 if (prev_idx < 0)
1201 prev_idx = max_idx - 1;
1202
1203 return prev_idx;
1204}
1205
1206static void
1207sample_system_load (ULONGLONG *idle, ULONGLONG *kernel, ULONGLONG *user)
1208{
1209 SYSTEM_INFO sysinfo;
1210 FILETIME ft_idle, ft_user, ft_kernel;
1211
1212 /* Initialize the number of processors on this machine. */
1213 if (num_of_processors <= 0)
1214 {
1215 get_native_system_info (&sysinfo);
1216 num_of_processors = sysinfo.dwNumberOfProcessors;
1217 if (num_of_processors <= 0)
1218 {
1219 GetSystemInfo (&sysinfo);
1220 num_of_processors = sysinfo.dwNumberOfProcessors;
1221 }
1222 if (num_of_processors <= 0)
1223 num_of_processors = 1;
1224 }
1225
1226 /* TODO: Take into account threads that are ready to run, by
1227 sampling the "\System\Processor Queue Length" performance
1228 counter. The code below accounts only for threads that are
1229 actually running. */
1230
1231 if (get_system_times (&ft_idle, &ft_kernel, &ft_user))
1232 {
1233 ULARGE_INTEGER uidle, ukernel, uuser;
1234
1235 memcpy (&uidle, &ft_idle, sizeof (ft_idle));
1236 memcpy (&ukernel, &ft_kernel, sizeof (ft_kernel));
1237 memcpy (&uuser, &ft_user, sizeof (ft_user));
1238 *idle = uidle.QuadPart;
1239 *kernel = ukernel.QuadPart;
1240 *user = uuser.QuadPart;
1241 }
1242 else
1243 {
1244 *idle = 0;
1245 *kernel = 0;
1246 *user = 0;
1247 }
1248}
1249
1250/* Produce the load average for a given time interval, using the
1251 samples in the samples[] array. WHICH can be 0, 1, or 2, meaning
1252 1-minute, 5-minute, or 15-minute average, respectively. */
1253static double
1254getavg (int which)
1255{
1256 double retval = -1.0;
1257 double tdiff;
1258 int idx;
1259 double span = (which == 0 ? 1.0 : (which == 1 ? 5.0 : 15.0)) * 60;
1260 time_t now = samples[last_idx].sample_time;
1261
1262 if (first_idx != last_idx)
1263 {
1264 for (idx = buf_prev (last_idx); ; idx = buf_prev (idx))
1265 {
1266 tdiff = difftime (now, samples[idx].sample_time);
1267 if (tdiff >= span - 2*DBL_EPSILON*now)
1268 {
1269 long double sys =
1270 samples[last_idx].kernel + samples[last_idx].user
1271 - (samples[idx].kernel + samples[idx].user);
1272 long double idl = samples[last_idx].idle - samples[idx].idle;
1273
1274 retval = (1.0 - idl / sys) * num_of_processors;
1275 break;
1276 }
1277 if (idx == first_idx)
1278 break;
1279 }
1280 }
1281
1282 return retval;
1283}
1284
95ed0025
RS		 1285int
1286getloadavg (double loadavg[], int nelem)
1287{
ad9e2d54
EZ		 1288 int elem;
1289 ULONGLONG idle, kernel, user;
1290 time_t now = time (NULL);
1291
1292 /* Store another sample. We ignore samples that are less than 1 sec
1293 apart. */
1294 if (difftime (now, samples[last_idx].sample_time) >= 1.0 - 2*DBL_EPSILON*now)
1295 {
1296 sample_system_load (&idle, &kernel, &user);
1297 last_idx = buf_next (last_idx);
1298 samples[last_idx].sample_time = now;
1299 samples[last_idx].idle = idle;
1300 samples[last_idx].kernel = kernel;
1301 samples[last_idx].user = user;
1302 /* If the buffer has more that 15 min worth of samples, discard
1303 the old ones. */
1304 if (first_idx == -1)
1305 first_idx = last_idx;
1306 while (first_idx != last_idx
1307 && (difftime (now, samples[first_idx].sample_time)
1308 >= 15.0*60 + 2*DBL_EPSILON*now))
1309 first_idx = buf_next (first_idx);
1310 }
95ed0025 1311
ad9e2d54 1312 for (elem = 0; elem < nelem; elem++)
95ed0025 1313 {
ad9e2d54
EZ		 1314 double avg = getavg (elem);
1315
1316 if (avg < 0)
1317 break;
1318 loadavg[elem] = avg;
95ed0025 1319 }
ad9e2d54
EZ		 1320
1321 return elem;
95ed0025
RS		 1322}
1323
480b0c5b 1324/* Emulate getpwuid, getpwnam and others. */
95ed0025 1325
051fe60d
GV		 1326#define PASSWD_FIELD_SIZE 256
1327
07f7980a
EZ		 1328static char dflt_passwd_name[PASSWD_FIELD_SIZE];
1329static char dflt_passwd_passwd[PASSWD_FIELD_SIZE];
1330static char dflt_passwd_gecos[PASSWD_FIELD_SIZE];
1331static char dflt_passwd_dir[PASSWD_FIELD_SIZE];
1332static char dflt_passwd_shell[PASSWD_FIELD_SIZE];
95ed0025 1333
07f7980a 1334static struct passwd dflt_passwd =
95ed0025 1335{
07f7980a
EZ		 1336 dflt_passwd_name,
1337 dflt_passwd_passwd,
95ed0025
RS		 1338 0,
1339 0,
1340 0,
07f7980a
EZ		 1341 dflt_passwd_gecos,
1342 dflt_passwd_dir,
1343 dflt_passwd_shell,
95ed0025
RS		 1344};
1345
07f7980a
EZ		 1346static char dflt_group_name[GNLEN+1];
1347
1348static struct group dflt_group =
3d19b645 1349{
07f7980a
EZ		 1350 /* When group information is not available, we return this as the
1351 group for all files. */
1352 dflt_group_name,
1353 0,
3d19b645
LH		 1354};
1355
22749e9a 1356unsigned
b56ceb92 1357getuid (void)
177c0ea7 1358{
07f7980a 1359 return dflt_passwd.pw_uid;
480b0c5b
GV		 1360}
1361
22749e9a 1362unsigned
b56ceb92 1363geteuid (void)
177c0ea7 1364{
480b0c5b
GV		 1365 /* I could imagine arguing for checking to see whether the user is
1366 in the Administrators group and returning a UID of 0 for that
1367 case, but I don't know how wise that would be in the long run. */
177c0ea7 1368 return getuid ();
480b0c5b
GV		 1369}
1370
22749e9a 1371unsigned
b56ceb92 1372getgid (void)
177c0ea7 1373{
07f7980a 1374 return dflt_passwd.pw_gid;
480b0c5b
GV		 1375}
1376
22749e9a 1377unsigned
b56ceb92 1378getegid (void)
177c0ea7 1379{
480b0c5b
GV		 1380 return getgid ();
1381}
1382
95ed0025 1383struct passwd *
22749e9a 1384getpwuid (unsigned uid)
95ed0025 1385{
07f7980a
EZ		 1386 if (uid == dflt_passwd.pw_uid)
1387 return &dflt_passwd;
480b0c5b 1388 return NULL;
95ed0025
RS		 1389}
1390
3d19b645
LH		 1391struct group *
1392getgrgid (gid_t gid)
1393{
07f7980a 1394 return &dflt_group;
3d19b645
LH		 1395}
1396
95ed0025
RS		 1397struct passwd *
1398getpwnam (char *name)
1399{
1400 struct passwd *pw;
177c0ea7 1401
95ed0025
RS		 1402 pw = getpwuid (getuid ());
1403 if (!pw)
1404 return pw;
1405
05131107 1406 if (xstrcasecmp (name, pw->pw_name))
95ed0025
RS		 1407 return NULL;
1408
1409 return pw;
1410}
1411
bedf4aab 1412static void
b56ceb92 1413init_user_info (void)
95ed0025 1414{
480b0c5b
GV		 1415 /* Find the user's real name by opening the process token and
1416 looking up the name associated with the user-sid in that token.
1417
1418 Use the relative portion of the identifier authority value from
1419 the user-sid as the user id value (same for group id using the
1420 primary group sid from the process token). */
1421
07f7980a 1422 char uname[UNLEN+1], gname[GNLEN+1], domain[1025];
32cef06e 1423 DWORD ulength = sizeof (uname), dlength = sizeof (domain), needed;
07f7980a 1424 DWORD glength = sizeof (gname);
10aabbf9
JB		 1425 HANDLE token = NULL;
1426 SID_NAME_USE user_type;
32cef06e
EZ		 1427 unsigned char *buf = NULL;
1428 DWORD blen = 0;
634d3003
EZ		 1429 TOKEN_USER user_token;
1430 TOKEN_PRIMARY_GROUP group_token;
32cef06e 1431 BOOL result;
10aabbf9 1432
32cef06e
EZ		 1433 result = open_process_token (GetCurrentProcess (), TOKEN_QUERY, &token);
1434 if (result)
1435 {
1436 result = get_token_information (token, TokenUser, NULL, 0, &blen);
1437 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
1438 {
1439 buf = xmalloc (blen);
1440 result = get_token_information (token, TokenUser,
1441 (LPVOID)buf, blen, &needed);
1442 if (result)
1443 {
1444 memcpy (&user_token, buf, sizeof (user_token));
1445 result = lookup_account_sid (NULL, user_token.User.Sid,
1446 uname, &ulength,
1447 domain, &dlength, &user_type);
1448 }
1449 }
1450 else
1451 result = FALSE;
1452 }
1453 if (result)
d1c1c3d2 1454 {
07f7980a 1455 strcpy (dflt_passwd.pw_name, uname);
c617afce 1456 /* Determine a reasonable uid value. */
05131107 1457 if (xstrcasecmp ("administrator", uname) == 0)
480b0c5b 1458 {
07f7980a
EZ		 1459 dflt_passwd.pw_uid = 500; /* well-known Administrator uid */
1460 dflt_passwd.pw_gid = 513; /* well-known None gid */
480b0c5b
GV		 1461 }
1462 else
1463 {
ce0ee994
EZ		 1464 /* Use the last sub-authority value of the RID, the relative
1465 portion of the SID, as user/group ID. */
8aaaec6b 1466 dflt_passwd.pw_uid = get_rid (user_token.User.Sid);
480b0c5b 1467
8aaaec6b 1468 /* Get group id and name. */
32cef06e
EZ		 1469 result = get_token_information (token, TokenPrimaryGroup,
1470 (LPVOID)buf, blen, &needed);
1471 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
1472 {
1473 buf = xrealloc (buf, blen = needed);
1474 result = get_token_information (token, TokenPrimaryGroup,
1475 (LPVOID)buf, blen, &needed);
1476 }
1477 if (result)
480b0c5b 1478 {
634d3003 1479 memcpy (&group_token, buf, sizeof (group_token));
8aaaec6b 1480 dflt_passwd.pw_gid = get_rid (group_token.PrimaryGroup);
07f7980a 1481 dlength = sizeof (domain);
32cef06e
EZ		 1482 /* If we can get at the real Primary Group name, use that.
1483 Otherwise, the default group name was already set to
1484 "None" in globals_of_w32. */
07f7980a
EZ		 1485 if (lookup_account_sid (NULL, group_token.PrimaryGroup,
1486 gname, &glength, NULL, &dlength,
1487 &user_type))
1488 strcpy (dflt_group_name, gname);
480b0c5b
GV		 1489 }
1490 else
07f7980a 1491 dflt_passwd.pw_gid = dflt_passwd.pw_uid;
480b0c5b
GV		 1492 }
1493 }
1494 /* If security calls are not supported (presumably because we
32cef06e 1495 are running under Windows 9X), fallback to this: */
07f7980a 1496 else if (GetUserName (uname, &ulength))
480b0c5b 1497 {
07f7980a 1498 strcpy (dflt_passwd.pw_name, uname);
05131107 1499 if (xstrcasecmp ("administrator", uname) == 0)
07f7980a 1500 dflt_passwd.pw_uid = 0;
480b0c5b 1501 else
07f7980a
EZ		 1502 dflt_passwd.pw_uid = 123;
1503 dflt_passwd.pw_gid = dflt_passwd.pw_uid;
480b0c5b
GV		 1504 }
1505 else
1506 {
07f7980a
EZ		 1507 strcpy (dflt_passwd.pw_name, "unknown");
1508 dflt_passwd.pw_uid = 123;
1509 dflt_passwd.pw_gid = 123;
d1c1c3d2 1510 }
07f7980a 1511 dflt_group.gr_gid = dflt_passwd.pw_gid;
95ed0025 1512
480b0c5b
GV		 1513 /* Ensure HOME and SHELL are defined. */
1514 if (getenv ("HOME") == NULL)
1088b922 1515 emacs_abort ();
480b0c5b 1516 if (getenv ("SHELL") == NULL)
1088b922 1517 emacs_abort ();
95ed0025 1518
480b0c5b 1519 /* Set dir and shell from environment variables. */
07f7980a
EZ		 1520 strcpy (dflt_passwd.pw_dir, getenv ("HOME"));
1521 strcpy (dflt_passwd.pw_shell, getenv ("SHELL"));
bd4a449f 1522
32cef06e 1523 xfree (buf);
480b0c5b
GV		 1524 if (token)
1525 CloseHandle (token);
95ed0025
RS		 1526}
1527
95ed0025 1528int
b56ceb92 1529random (void)
95ed0025 1530{
480b0c5b
GV		 1531 /* rand () on NT gives us 15 random bits...hack together 30 bits. */
1532 return ((rand () << 15) | rand ());
95ed0025
RS		 1533}
1534
95ed0025 1535void
480b0c5b 1536srandom (int seed)
95ed0025 1537{
480b0c5b 1538 srand (seed);
95ed0025
RS		 1539}
1540
6d2851de
EZ		 1541/* Current codepage for encoding file names. */
1542static int file_name_codepage;
1543
1544/* Return the maximum length in bytes of a multibyte character
1545 sequence encoded in the current ANSI codepage. This is required to
1546 correctly walk the encoded file names one character at a time. */
1547static int
1548max_filename_mbslen (void)
1549{
1550 /* A simple cache to avoid calling GetCPInfo every time we need to
1551 normalize a file name. The file-name encoding is not supposed to
1552 be changed too frequently, if ever. */
1553 static Lisp_Object last_file_name_encoding;
1554 static int last_max_mbslen;
1555 Lisp_Object current_encoding;
1556
1557 current_encoding = Vfile_name_coding_system;
1558 if (NILP (current_encoding))
1559 current_encoding = Vdefault_file_name_coding_system;
1560
1561 if (!EQ (last_file_name_encoding, current_encoding))
1562 {
1563 CPINFO cp_info;
1564
1565 last_file_name_encoding = current_encoding;
1566 /* Default to the current ANSI codepage. */
1567 file_name_codepage = w32_ansi_code_page;
1568 if (!NILP (current_encoding))
1569 {
1570 char *cpname = SDATA (SYMBOL_NAME (current_encoding));
1571 char *cp = NULL, *end;
1572 int cpnum;
1573
1574 if (strncmp (cpname, "cp", 2) == 0)
1575 cp = cpname + 2;
1576 else if (strncmp (cpname, "windows-", 8) == 0)
1577 cp = cpname + 8;
1578
1579 if (cp)
1580 {
1581 end = cp;
1582 cpnum = strtol (cp, &end, 10);
1583 if (cpnum && *end == '\0' && end - cp >= 2)
1584 file_name_codepage = cpnum;
1585 }
1586 }
1587
1588 if (!file_name_codepage)
1589 file_name_codepage = CP_ACP; /* CP_ACP = 0, but let's not assume that */
1590
1591 if (!GetCPInfo (file_name_codepage, &cp_info))
1592 {
1593 file_name_codepage = CP_ACP;
1594 if (!GetCPInfo (file_name_codepage, &cp_info))
1595 emacs_abort ();
1596 }
1597 last_max_mbslen = cp_info.MaxCharSize;
1598 }
1599
1600 return last_max_mbslen;
1601}
76b3903d 1602
cbe39279
RS		 1603/* Normalize filename by converting all path separators to
1604 the specified separator. Also conditionally convert upper
1605 case path name components to lower case. */
1606
1607static void
e7ac588e 1608normalize_filename (register char *fp, char path_sep, int multibyte)
cbe39279
RS		 1609{
1610 char sep;
6d2851de
EZ		 1611 char *elem, *p2;
1612 int dbcs_p = max_filename_mbslen () > 1;
cbe39279 1613
e7ac588e
EZ		 1614 /* Multibyte file names are in the Emacs internal representation, so
1615 we can traverse them by bytes with no problems. */
1616 if (multibyte)
1617 dbcs_p = 0;
1618
5162ffce
MB		 1619 /* Always lower-case drive letters a-z, even if the filesystem
1620 preserves case in filenames.
1621 This is so filenames can be compared by string comparison
1622 functions that are case-sensitive. Even case-preserving filesystems
1623 do not distinguish case in drive letters. */
6d2851de
EZ		 1624 if (dbcs_p)
1625 p2 = CharNextExA (file_name_codepage, fp, 0);
1626 else
1627 p2 = fp + 1;
1628
1629 if (*p2 == ':' && *fp >= 'A' && *fp <= 'Z')
5162ffce
MB		 1630 {
1631 *fp += 'a' - 'A';
1632 fp += 2;
1633 }
1634
e7ac588e 1635 if (multibyte || NILP (Vw32_downcase_file_names))
cbe39279
RS		 1636 {
1637 while (*fp)
1638 {
1639 if (*fp == '/' || *fp == '\\')
1640 *fp = path_sep;
6d2851de
EZ		 1641 if (!dbcs_p)
1642 fp++;
1643 else
1644 fp = CharNextExA (file_name_codepage, fp, 0);
cbe39279
RS		 1645 }
1646 return;
1647 }
1648
1649 sep = path_sep; /* convert to this path separator */
1650 elem = fp; /* start of current path element */
1651
1652 do {
1653 if (*fp >= 'a' && *fp <= 'z')
1654 elem = 0; /* don't convert this element */
1655
1656 if (*fp == 0 || *fp == ':')
1657 {
1658 sep = *fp; /* restore current separator (or 0) */
1659 *fp = '/'; /* after conversion of this element */
1660 }
1661
1662 if (*fp == '/' || *fp == '\\')
1663 {
1664 if (elem && elem != fp)
1665 {
1666 *fp = 0; /* temporary end of string */
6d2851de 1667 _mbslwr (elem); /* while we convert to lower case */
cbe39279
RS		 1668 }
1669 *fp = sep; /* convert (or restore) path separator */
1670 elem = fp + 1; /* next element starts after separator */
1671 sep = path_sep;
1672 }
6d2851de
EZ		 1673 if (*fp)
1674 {
1675 if (!dbcs_p)
1676 fp++;
1677 else
1678 fp = CharNextExA (file_name_codepage, fp, 0);
1679 }
1680 } while (*fp);
cbe39279
RS		 1681}
1682
e7ac588e
EZ		 1683/* Destructively turn backslashes into slashes. MULTIBYTE non-zero
1684 means the file name is a multibyte string in Emacs's internal
1685 representation. */
95ed0025 1686void
e7ac588e 1687dostounix_filename (register char *p, int multibyte)
95ed0025 1688{
e7ac588e 1689 normalize_filename (p, '/', multibyte);
95ed0025
RS		 1690}
1691
480b0c5b 1692/* Destructively turn slashes into backslashes. */
95ed0025 1693void
b56ceb92 1694unixtodos_filename (register char *p)
95ed0025 1695{
e7ac588e 1696 normalize_filename (p, '\\', 0);
95ed0025
RS		 1697}
1698
480b0c5b
GV		 1699/* Remove all CR's that are followed by a LF.
1700 (From msdos.c...probably should figure out a way to share it,
1701 although this code isn't going to ever change.) */
bedf4aab 1702static int
b56ceb92 1703crlf_to_lf (register int n, register unsigned char *buf)
35f0d482 1704{
480b0c5b
GV		 1705 unsigned char *np = buf;
1706 unsigned char *startp = buf;
1707 unsigned char *endp = buf + n;
35f0d482 1708
480b0c5b
GV		 1709 if (n == 0)
1710 return n;
1711 while (buf < endp - 1)
95ed0025 1712 {
480b0c5b
GV		 1713 if (*buf == 0x0d)
1714 {
1715 if (*(++buf) != 0x0a)
1716 *np++ = 0x0d;
1717 }
1718 else
1719 *np++ = *buf++;
95ed0025 1720 }
480b0c5b
GV		 1721 if (buf < endp)
1722 *np++ = *buf++;
1723 return np - startp;
95ed0025
RS		 1724}
1725
76b3903d
GV		 1726/* Parse the root part of file name, if present. Return length and
1727 optionally store pointer to char after root. */
1728static int
1729parse_root (char * name, char ** pPath)
1730{
1731 char * start = name;
1732
1733 if (name == NULL)
1734 return 0;
1735
1736 /* find the root name of the volume if given */
1737 if (isalpha (name[0]) && name[1] == ':')
1738 {
1739 /* skip past drive specifier */
1740 name += 2;
1741 if (IS_DIRECTORY_SEP (name[0]))
1742 name++;
1743 }
1744 else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1]))
1745 {
1746 int slashes = 2;
806fed21
EZ		 1747 int dbcs_p = max_filename_mbslen () > 1;
1748
76b3903d
GV		 1749 name += 2;
1750 do
1751 {
1752 if (IS_DIRECTORY_SEP (*name) && --slashes == 0)
1753 break;
806fed21
EZ		 1754 if (dbcs_p)
1755 name = CharNextExA (file_name_codepage, name, 0);
1756 else
1757 name++;
76b3903d
GV		 1758 }
1759 while ( *name );
1760 if (IS_DIRECTORY_SEP (name[0]))
1761 name++;
1762 }
1763
1764 if (pPath)
1765 *pPath = name;
1766
1767 return name - start;
1768}
1769
1770/* Get long base name for name; name is assumed to be absolute. */
1771static int
1772get_long_basename (char * name, char * buf, int size)
1773{
1774 WIN32_FIND_DATA find_data;
1775 HANDLE dir_handle;
1776 int len = 0;
1777
9ab8560d 1778 /* must be valid filename, no wild cards or other invalid characters */
22189f79 1779 if (_mbspbrk (name, "*?|<>\""))
bb1584c8
RS		 1780 return 0;
1781
76b3903d
GV		 1782 dir_handle = FindFirstFile (name, &find_data);
1783 if (dir_handle != INVALID_HANDLE_VALUE)
1784 {
1785 if ((len = strlen (find_data.cFileName)) < size)
1786 memcpy (buf, find_data.cFileName, len + 1);
1787 else
1788 len = 0;
1789 FindClose (dir_handle);
1790 }
1791 return len;
1792}
1793
1794/* Get long name for file, if possible (assumed to be absolute). */
1795BOOL
1796w32_get_long_filename (char * name, char * buf, int size)
1797{
1798 char * o = buf;
1799 char * p;
1800 char * q;
1801 char full[ MAX_PATH ];
1802 int len;
1803
1804 len = strlen (name);
1805 if (len >= MAX_PATH)
1806 return FALSE;
1807
1808 /* Use local copy for destructive modification. */
1809 memcpy (full, name, len+1);
1810 unixtodos_filename (full);
1811
1812 /* Copy root part verbatim. */
1813 len = parse_root (full, &p);
1814 memcpy (o, full, len);
1815 o += len;
4f8ac0b2 1816 *o = '\0';
76b3903d
GV		 1817 size -= len;
1818
4f8ac0b2 1819 while (p != NULL && *p)
76b3903d
GV		 1820 {
1821 q = p;
6ee4509a 1822 p = _mbschr (q, '\\');
76b3903d
GV		 1823 if (p) *p = '\0';
1824 len = get_long_basename (full, o, size);
1825 if (len > 0)
1826 {
1827 o += len;
1828 size -= len;
1829 if (p != NULL)
1830 {
1831 *p++ = '\\';
1832 if (size < 2)
1833 return FALSE;
1834 *o++ = '\\';
1835 size--;
1836 *o = '\0';
1837 }
1838 }
1839 else
1840 return FALSE;
1841 }
76b3903d
GV		 1842
1843 return TRUE;
1844}
1845
bedf4aab 1846static int
9d3355d1
GV		 1847is_unc_volume (const char *filename)
1848{
1849 const char *ptr = filename;
1850
1851 if (!IS_DIRECTORY_SEP (ptr[0]) || !IS_DIRECTORY_SEP (ptr[1]) || !ptr[2])
1852 return 0;
1853
22189f79 1854 if (_mbspbrk (ptr + 2, "*?|<>\"\\/"))
9d3355d1
GV		 1855 return 0;
1856
1857 return 1;
1858}
76b3903d 1859
75ceee05
EZ		 1860/* Emulate the Posix unsetenv. */
1861int
1862unsetenv (const char *name)
1863{
1864 char *var;
1865 size_t name_len;
1866 int retval;
1867
1868 if (name == NULL || *name == '\0' || strchr (name, '=') != NULL)
1869 {
1870 errno = EINVAL;
1871 return -1;
1872 }
1873 name_len = strlen (name);
1874 /* MS docs says an environment variable cannot be longer than 32K. */
1875 if (name_len > 32767)
1876 {
1877 errno = ENOMEM;
a16e75cd 1878 return 0;
75ceee05
EZ		 1879 }
1880 /* It is safe to use 'alloca' with 32K size, since the stack is at
1881 least 2MB, and we set it to 8MB in the link command line. */
1882 var = alloca (name_len + 2);
a7f11948 1883 strncpy (var, name, name_len);
75ceee05
EZ		 1884 var[name_len++] = '=';
1885 var[name_len] = '\0';
1886 return _putenv (var);
1887}
1888
1889/* MS _putenv doesn't support removing a variable when the argument
1890 does not include the '=' character, so we fix that here. */
1891int
1892sys_putenv (char *str)
1893{
1894 const char *const name_end = strchr (str, '=');
1895
1896 if (name_end == NULL)
1897 {
1898 /* Remove the variable from the environment. */
1899 return unsetenv (str);
1900 }
1901
1902 return _putenv (str);
1903}
1904
480b0c5b 1905#define REG_ROOT "SOFTWARE\\GNU\\Emacs"
f332b293 1906
177c0ea7 1907LPBYTE
b56ceb92 1908w32_get_resource (char *key, LPDWORD lpdwtype)
f332b293
GV		 1909{
1910 LPBYTE lpvalue;
1911 HKEY hrootkey = NULL;
1912 DWORD cbData;
177c0ea7
JB		 1913
1914 /* Check both the current user and the local machine to see if
f332b293 1915 we have any resources. */
177c0ea7 1916
f332b293
GV		 1917 if (RegOpenKeyEx (HKEY_CURRENT_USER, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS)
1918 {
1919 lpvalue = NULL;
1920
177c0ea7 1921 if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS
23f86fce 1922 && (lpvalue = xmalloc (cbData)) != NULL
f332b293
GV		 1923 && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS)
1924 {
4da4d9bb 1925 RegCloseKey (hrootkey);
f332b293
GV		 1926 return (lpvalue);
1927 }
1928
70fdbb46 1929 xfree (lpvalue);
177c0ea7 1930
f332b293 1931 RegCloseKey (hrootkey);
177c0ea7
JB		 1932 }
1933
f332b293
GV		 1934 if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS)
1935 {
1936 lpvalue = NULL;
177c0ea7 1937
76b3903d 1938 if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS
23f86fce 1939 && (lpvalue = xmalloc (cbData)) != NULL
76b3903d 1940 && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS)
f332b293 1941 {
4da4d9bb 1942 RegCloseKey (hrootkey);
f332b293
GV		 1943 return (lpvalue);
1944 }
177c0ea7 1945
70fdbb46 1946 xfree (lpvalue);
177c0ea7 1947
f332b293 1948 RegCloseKey (hrootkey);
177c0ea7
JB		 1949 }
1950
f332b293
GV		 1951 return (NULL);
1952}
1953
75b08edb 1954char *get_emacs_configuration (void);
94eab1c8 1955
f332b293 1956void
aa7b87b0 1957init_environment (char ** argv)
f332b293 1958{
b3308d2e
KH		 1959 static const char * const tempdirs[] = {
1960 "$TMPDIR", "$TEMP", "$TMP", "c:/"
1961 };
2d5324c5 1962
b3308d2e 1963 int i;
2d5324c5 1964
b3308d2e
KH		 1965 const int imax = sizeof (tempdirs) / sizeof (tempdirs[0]);
1966
1967 /* Make sure they have a usable $TMPDIR. Many Emacs functions use
1968 temporary files and assume "/tmp" if $TMPDIR is unset, which
1969 will break on DOS/Windows. Refuse to work if we cannot find
1970 a directory, not even "c:/", usable for that purpose. */
1971 for (i = 0; i < imax ; i++)
1972 {
1973 const char *tmp = tempdirs[i];
1974
1975 if (*tmp == '$')
1976 tmp = getenv (tmp + 1);
1977 /* Note that `access' can lie to us if the directory resides on a
1978 read-only filesystem, like CD-ROM or a write-protected floppy.
1979 The only way to be really sure is to actually create a file and
1980 see if it succeeds. But I think that's too much to ask. */
6dad7178
EZ		 1981
1982 /* MSVCRT's _access crashes with D_OK. */
14f20728 1983 if (tmp && faccessat (AT_FDCWD, tmp, D_OK, AT_EACCESS) == 0)
b3308d2e
KH		 1984 {
1985 char * var = alloca (strlen (tmp) + 8);
1986 sprintf (var, "TMPDIR=%s", tmp);
aca583b2 1987 _putenv (strdup (var));
b3308d2e
KH		 1988 break;
1989 }
1990 }
1991 if (i >= imax)
1992 cmd_error_internal
1993 (Fcons (Qerror,
1994 Fcons (build_string ("no usable temporary directories found!!"),
1995 Qnil)),
1996 "While setting TMPDIR: ");
1997
ca149beb
AI		 1998 /* Check for environment variables and use registry settings if they
1999 don't exist. Fallback on default values where applicable. */
f332b293 2000 {
480b0c5b
GV		 2001 int i;
2002 LPBYTE lpval;
2003 DWORD dwType;
69fb0241 2004 char locale_name[32];
2d5324c5 2005 char default_home[MAX_PATH];
fdc5744d 2006 int appdata = 0;
f332b293 2007
e00b99c8 2008 static const struct env_entry
ca149beb
AI		 2009 {
2010 char * name;
2011 char * def_value;
e00b99c8 2012 } dflt_envvars[] =
ca149beb 2013 {
76151e2c
EZ		 2014 /* If the default value is NULL, we will use the value from the
2015 outside environment or the Registry, but will not push the
2016 variable into the Emacs environment if it is defined neither
2017 in the Registry nor in the outside environment. */
ca149beb
AI		 2018 {"HOME", "C:/"},
2019 {"PRELOAD_WINSOCK", NULL},
2020 {"emacs_dir", "C:/emacs"},
76151e2c 2021 {"EMACSLOADPATH", NULL},
7d9fb4de 2022 {"SHELL", "cmdproxy.exe"}, /* perhaps it is somewhere on PATH */
76151e2c
EZ		 2023 {"EMACSDATA", NULL},
2024 {"EMACSPATH", NULL},
2025 {"INFOPATH", NULL},
2026 {"EMACSDOC", NULL},
69fb0241
JR		 2027 {"TERM", "cmd"},
2028 {"LANG", NULL},
480b0c5b
GV		 2029 };
2030
ed3751c8 2031#define N_ENV_VARS sizeof (dflt_envvars)/sizeof (dflt_envvars[0])
e00b99c8
EZ		 2032
2033 /* We need to copy dflt_envvars[] and work on the copy because we
2034 don't want the dumped Emacs to inherit the values of
2035 environment variables we saw during dumping (which could be on
2036 a different system). The defaults above must be left intact. */
2037 struct env_entry env_vars[N_ENV_VARS];
2038
2039 for (i = 0; i < N_ENV_VARS; i++)
2040 env_vars[i] = dflt_envvars[i];
2041
2d5324c5
JR		 2042 /* For backwards compatibility, check if a .emacs file exists in C:/
2043 If not, then we can try to default to the appdata directory under the
2044 user's profile, which is more likely to be writable. */
99b1553e 2045 if (!check_existing ("C:/.emacs"))
94eab1c8
JB		 2046 {
2047 HRESULT profile_result;
2048 /* Dynamically load ShGetFolderPath, as it won't exist on versions
2049 of Windows 95 and NT4 that have not been updated to include
2050 MSIE 5. */
2051 ShGetFolderPath_fn get_folder_path;
2052 get_folder_path = (ShGetFolderPath_fn)
2053 GetProcAddress (GetModuleHandle ("shell32.dll"), "SHGetFolderPathA");
2054
2055 if (get_folder_path != NULL)
2056 {
2057 profile_result = get_folder_path (NULL, CSIDL_APPDATA, NULL,
2058 0, default_home);
2d5324c5 2059
94eab1c8
JB		 2060 /* If we can't get the appdata dir, revert to old behavior. */
2061 if (profile_result == S_OK)
fdc5744d
JB		 2062 {
2063 env_vars[0].def_value = default_home;
2064 appdata = 1;
2065 }
94eab1c8
JB		 2066 }
2067 }
2d5324c5 2068
69fb0241
JR		 2069 /* Get default locale info and use it for LANG. */
2070 if (GetLocaleInfo (LOCALE_USER_DEFAULT,
2071 LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP,
2072 locale_name, sizeof (locale_name)))
2073 {
e00b99c8 2074 for (i = 0; i < N_ENV_VARS; i++)
69fb0241
JR		 2075 {
2076 if (strcmp (env_vars[i].name, "LANG") == 0)
2077 {
2078 env_vars[i].def_value = locale_name;
2079 break;
2080 }
2081 }
2082 }
2083
ca149beb
AI		 2084#define SET_ENV_BUF_SIZE (4 * MAX_PATH) /* to cover EMACSLOADPATH */
2085
2086 /* Treat emacs_dir specially: set it unconditionally based on our
76151e2c 2087 location. */
ca149beb
AI		 2088 {
2089 char *p;
2090 char modname[MAX_PATH];
2091
2092 if (!GetModuleFileName (NULL, modname, MAX_PATH))
1088b922 2093 emacs_abort ();
6ee4509a 2094 if ((p = _mbsrchr (modname, '\\')) == NULL)
1088b922 2095 emacs_abort ();
ca149beb
AI		 2096 *p = 0;
2097
7d9fb4de
EZ		 2098 if ((p = _mbsrchr (modname, '\\'))
2099 /* From bin means installed Emacs, from src means uninstalled. */
2100 && (xstrcasecmp (p, "\\bin") == 0 || xstrcasecmp (p, "\\src") == 0))
ca149beb
AI		 2101 {
2102 char buf[SET_ENV_BUF_SIZE];
7d9fb4de 2103 int within_build_tree = xstrcasecmp (p, "\\src") == 0;
ca149beb
AI		 2104
2105 *p = 0;
6ee4509a 2106 for (p = modname; *p; p = CharNext (p))
ca149beb 2107 if (*p == '\\') *p = '/';
177c0ea7 2108
ed3751c8 2109 _snprintf (buf, sizeof (buf)-1, "emacs_dir=%s", modname);
a302c7ae 2110 _putenv (strdup (buf));
7d9fb4de
EZ		 2111 /* If we are running from the Posix-like build tree, define
2112 SHELL to point to our own cmdproxy. The loop below will
2113 then disregard PATH_EXEC and the default value. */
2114 if (within_build_tree)
2115 {
2116 _snprintf (buf, sizeof (buf) - 1,
2117 "SHELL=%s/nt/cmdproxy.exe", modname);
2118 _putenv (strdup (buf));
2119 }
ca149beb 2120 }
950090be
JR		 2121 /* Handle running emacs from the build directory: src/oo-spd/i386/ */
2122
2123 /* FIXME: should use substring of get_emacs_configuration ().
2124 But I don't think the Windows build supports alpha, mips etc
2125 anymore, so have taken the easy option for now. */
62aba0d4
FP		 2126 else if (p && (xstrcasecmp (p, "\\i386") == 0
2127 || xstrcasecmp (p, "\\AMD64") == 0))
950090be
JR		 2128 {
2129 *p = 0;
6ee4509a 2130 p = _mbsrchr (modname, '\\');
950090be
JR		 2131 if (p != NULL)
2132 {
2133 *p = 0;
6ee4509a 2134 p = _mbsrchr (modname, '\\');
05131107 2135 if (p && xstrcasecmp (p, "\\src") == 0)
950090be
JR		 2136 {
2137 char buf[SET_ENV_BUF_SIZE];
2138
2139 *p = 0;
6ee4509a 2140 for (p = modname; *p; p = CharNext (p))
950090be
JR		 2141 if (*p == '\\') *p = '/';
2142
ed3751c8 2143 _snprintf (buf, sizeof (buf)-1, "emacs_dir=%s", modname);
950090be
JR		 2144 _putenv (strdup (buf));
2145 }
2146 }
2147 }
ca149beb
AI		 2148 }
2149
e00b99c8 2150 for (i = 0; i < N_ENV_VARS; i++)
f332b293 2151 {
ca149beb 2152 if (!getenv (env_vars[i].name))
480b0c5b 2153 {
ca149beb 2154 int dont_free = 0;
7d9fb4de 2155 char bufc[SET_ENV_BUF_SIZE];
480b0c5b 2156
aa5ee2a3
JB		 2157 if ((lpval = w32_get_resource (env_vars[i].name, &dwType)) == NULL
2158 /* Also ignore empty environment variables. */
2159 || *lpval == 0)
ca149beb 2160 {
70fdbb46 2161 xfree (lpval);
ca149beb 2162 dont_free = 1;
7d9fb4de
EZ		 2163 if (strcmp (env_vars[i].name, "SHELL") == 0)
2164 {
2165 /* Look for cmdproxy.exe in every directory in
2166 PATH_EXEC. FIXME: This does not find cmdproxy
2167 in nt/ when we run uninstalled. */
2168 char fname[MAX_PATH];
2169 const char *pstart = PATH_EXEC, *pend;
2170
2171 do {
2172 pend = _mbschr (pstart, ';');
2173 if (!pend)
2174 pend = pstart + strlen (pstart);
2175 /* Be defensive against series of ;;; characters. */
2176 if (pend > pstart)
2177 {
2178 strncpy (fname, pstart, pend - pstart);
2179 fname[pend - pstart] = '/';
2180 strcpy (&fname[pend - pstart + 1], "cmdproxy.exe");
2181 ExpandEnvironmentStrings ((LPSTR) fname, bufc,
2182 sizeof (bufc));
2183 if (check_existing (bufc))
2184 {
2185 lpval = bufc;
2186 dwType = REG_SZ;
2187 break;
2188 }
2189 }
2190 if (*pend)
2191 pstart = pend + 1;
2192 else
2193 pstart = pend;
2194 if (!*pstart)
2195 {
2196 /* If not found in any directory, use the
2197 default as the last resort. */
2198 lpval = env_vars[i].def_value;
2199 dwType = REG_EXPAND_SZ;
2200 }
2201 } while (*pstart);
2202 }
2203 else
2204 {
2205 lpval = env_vars[i].def_value;
2206 dwType = REG_EXPAND_SZ;
2207 }
2208 if (strcmp (env_vars[i].name, "HOME") == 0 && !appdata)
3438fe21
EZ		 2209 Vdelayed_warnings_list
2210 = Fcons (listn (CONSTYPE_HEAP, 2,
073c88c2 2211 intern ("initialization"),
694b6c97 2212 build_string ("Setting HOME to C:\\ by default is deprecated")),
073c88c2 2213 Vdelayed_warnings_list);
480b0c5b 2214 }
ca149beb
AI		 2215
2216 if (lpval)
480b0c5b 2217 {
892eb237 2218 char buf1[SET_ENV_BUF_SIZE], buf2[SET_ENV_BUF_SIZE];
ca149beb 2219
892eb237 2220 if (dwType == REG_EXPAND_SZ)
ed3751c8 2221 ExpandEnvironmentStrings ((LPSTR) lpval, buf1, sizeof (buf1));
ca149beb 2222 else if (dwType == REG_SZ)
892eb237
EZ		 2223 strcpy (buf1, lpval);
2224 if (dwType == REG_EXPAND_SZ || dwType == REG_SZ)
ca149beb 2225 {
ed3751c8 2226 _snprintf (buf2, sizeof (buf2)-1, "%s=%s", env_vars[i].name,
892eb237
EZ		 2227 buf1);
2228 _putenv (strdup (buf2));
ca149beb 2229 }
f332b293 2230
ca149beb
AI		 2231 if (!dont_free)
2232 xfree (lpval);
2233 }
480b0c5b
GV		 2234 }
2235 }
2236 }
2237
75b08edb
GV		 2238 /* Rebuild system configuration to reflect invoking system. */
2239 Vsystem_configuration = build_string (EMACS_CONFIGURATION);
2240
76b3903d
GV		 2241 /* Another special case: on NT, the PATH variable is actually named
2242 "Path" although cmd.exe (perhaps NT itself) arranges for
2243 environment variable lookup and setting to be case insensitive.
2244 However, Emacs assumes a fully case sensitive environment, so we
2245 need to change "Path" to "PATH" to match the expectations of
2246 various elisp packages. We do this by the sneaky method of
2247 modifying the string in the C runtime environ entry.
2248
2249 The same applies to COMSPEC. */
2250 {
2251 char ** envp;
2252
2253 for (envp = environ; *envp; envp++)
2254 if (_strnicmp (*envp, "PATH=", 5) == 0)
2255 memcpy (*envp, "PATH=", 5);
2256 else if (_strnicmp (*envp, "COMSPEC=", 8) == 0)
2257 memcpy (*envp, "COMSPEC=", 8);
2258 }
2259
9239d970 2260 /* Remember the initial working directory for getcwd. */
6dad7178
EZ		 2261 /* FIXME: Do we need to resolve possible symlinks in startup_dir?
2262 Does it matter anywhere in Emacs? */
76b3903d 2263 if (!GetCurrentDirectory (MAXPATHLEN, startup_dir))
1088b922 2264 emacs_abort ();
76b3903d
GV		 2265
2266 {
aa7b87b0 2267 static char modname[MAX_PATH];
76b3903d
GV		 2268
2269 if (!GetModuleFileName (NULL, modname, MAX_PATH))
1088b922 2270 emacs_abort ();
aa7b87b0 2271 argv[0] = modname;
76b3903d
GV		 2272 }
2273
20af4831
JR		 2274 /* Determine if there is a middle mouse button, to allow parse_button
2275 to decide whether right mouse events should be mouse-2 or
2276 mouse-3. */
e0c181dd 2277 w32_num_mouse_buttons = GetSystemMetrics (SM_CMOUSEBUTTONS);
20af4831 2278
480b0c5b
GV		 2279 init_user_info ();
2280}
2281
6dad7178
EZ		 2282/* Called from expand-file-name when default-directory is not a string. */
2283
bf794306
EZ		 2284char *
2285emacs_root_dir (void)
2286{
2287 static char root_dir[FILENAME_MAX];
2288 const char *p;
2289
2290 p = getenv ("emacs_dir");
2291 if (p == NULL)
1088b922 2292 emacs_abort ();
bf794306
EZ		 2293 strcpy (root_dir, p);
2294 root_dir[parse_root (root_dir, NULL)] = '\0';
e7ac588e 2295 dostounix_filename (root_dir, 0);
bf794306
EZ		 2296 return root_dir;
2297}
2298
480b0c5b
GV		 2299/* We don't have scripts to automatically determine the system configuration
2300 for Emacs before it's compiled, and we don't want to have to make the
2301 user enter it, so we define EMACS_CONFIGURATION to invoke this runtime
2302 routine. */
2303
480b0c5b
GV		 2304char *
2305get_emacs_configuration (void)
2306{
2307 char *arch, *oem, *os;
c5247da2 2308 int build_num;
a302c7ae 2309 static char configuration_buffer[32];
480b0c5b
GV		 2310
2311 /* Determine the processor type. */
177c0ea7 2312 switch (get_processor_type ())
480b0c5b
GV		 2313 {
2314
2315#ifdef PROCESSOR_INTEL_386
2316 case PROCESSOR_INTEL_386:
2317 case PROCESSOR_INTEL_486:
2318 case PROCESSOR_INTEL_PENTIUM:
62aba0d4
FP		 2319#ifdef _WIN64
2320 arch = "amd64";
2321#else
480b0c5b 2322 arch = "i386";
62aba0d4
FP		 2323#endif
2324 break;
2325#endif
2326#ifdef PROCESSOR_AMD_X8664
2327 case PROCESSOR_AMD_X8664:
2328 arch = "amd64";
480b0c5b
GV		 2329 break;
2330#endif
2331
480b0c5b
GV		 2332#ifdef PROCESSOR_MIPS_R2000
2333 case PROCESSOR_MIPS_R2000:
2334 case PROCESSOR_MIPS_R3000:
2335 case PROCESSOR_MIPS_R4000:
2336 arch = "mips";
2337 break;
2338#endif
2339
2340#ifdef PROCESSOR_ALPHA_21064
2341 case PROCESSOR_ALPHA_21064:
2342 arch = "alpha";
2343 break;
2344#endif
2345
2346 default:
2347 arch = "unknown";
2348 break;
f332b293 2349 }
480b0c5b 2350
a302c7ae
AI		 2351 /* Use the OEM field to reflect the compiler/library combination. */
2352#ifdef _MSC_VER
2353#define COMPILER_NAME "msvc"
2354#else
2355#ifdef __GNUC__
2356#define COMPILER_NAME "mingw"
2357#else
2358#define COMPILER_NAME "unknown"
2359#endif
2360#endif
2361 oem = COMPILER_NAME;
480b0c5b 2362
c5247da2
GV		 2363 switch (osinfo_cache.dwPlatformId) {
2364 case VER_PLATFORM_WIN32_NT:
2365 os = "nt";
2366 build_num = osinfo_cache.dwBuildNumber;
2367 break;
2368 case VER_PLATFORM_WIN32_WINDOWS:
2369 if (osinfo_cache.dwMinorVersion == 0) {
2370 os = "windows95";
2371 } else {
2372 os = "windows98";
2373 }
2374 build_num = LOWORD (osinfo_cache.dwBuildNumber);
2375 break;
2376 case VER_PLATFORM_WIN32s:
2377 /* Not supported, should not happen. */
2378 os = "windows32s";
2379 build_num = LOWORD (osinfo_cache.dwBuildNumber);
2380 break;
2381 default:
2382 os = "unknown";
2383 build_num = 0;
2384 break;
2385 }
2386
2387 if (osinfo_cache.dwPlatformId == VER_PLATFORM_WIN32_NT) {
2388 sprintf (configuration_buffer, "%s-%s-%s%d.%d.%d", arch, oem, os,
2389 get_w32_major_version (), get_w32_minor_version (), build_num);
2390 } else {
2391 sprintf (configuration_buffer, "%s-%s-%s.%d", arch, oem, os, build_num);
2392 }
480b0c5b 2393
480b0c5b 2394 return configuration_buffer;
f332b293
GV		 2395}
2396
a302c7ae
AI		 2397char *
2398get_emacs_configuration_options (void)
2399{
38c54d9d
JB		 2400 static char *options_buffer;
2401 char cv[32]; /* Enough for COMPILER_VERSION. */
2402 char *options[] = {
2403 cv, /* To be filled later. */
2404#ifdef EMACSDEBUG
2405 " --no-opt",
d7f29f8e
EZ		 2406#endif
2407#ifdef ENABLE_CHECKING
2408 " --enable-checking",
38c54d9d
JB		 2409#endif
2410 /* configure.bat already sets USER_CFLAGS and USER_LDFLAGS
2411 with a starting space to save work here. */
2412#ifdef USER_CFLAGS
2413 " --cflags", USER_CFLAGS,
2414#endif
2415#ifdef USER_LDFLAGS
2416 " --ldflags", USER_LDFLAGS,
2417#endif
2418 NULL
2419 };
2420 size_t size = 0;
2421 int i;
a302c7ae
AI		 2422
2423/* Work out the effective configure options for this build. */
2424#ifdef _MSC_VER
2425#define COMPILER_VERSION "--with-msvc (%d.%02d)", _MSC_VER / 100, _MSC_VER % 100
2426#else
2427#ifdef __GNUC__
2428#define COMPILER_VERSION "--with-gcc (%d.%d)", __GNUC__, __GNUC_MINOR__
2429#else
2430#define COMPILER_VERSION ""
2431#endif
2432#endif
2433
83e245c4 2434 if (_snprintf (cv, sizeof (cv) - 1, COMPILER_VERSION) < 0)
38c54d9d 2435 return "Error: not enough space for compiler version";
83e245c4 2436 cv[sizeof (cv) - 1] = '\0';
38c54d9d
JB		 2437
2438 for (i = 0; options[i]; i++)
2439 size += strlen (options[i]);
2440
2441 options_buffer = xmalloc (size + 1);
fc33e153 2442 options_buffer[0] = '\0';
38c54d9d
JB		 2443
2444 for (i = 0; options[i]; i++)
2445 strcat (options_buffer, options[i]);
2446
a302c7ae
AI		 2447 return options_buffer;
2448}
2449
2450
35f0d482
KH		 2451#include <sys/timeb.h>
2452
2453/* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */
97dababa 2454int
5d611e04 2455gettimeofday (struct timeval *restrict tv, struct timezone *restrict tz)
35f0d482 2456{
6e602566 2457 struct _timeb tb;
35f0d482
KH		 2458 _ftime (&tb);
2459
2460 tv->tv_sec = tb.time;
2461 tv->tv_usec = tb.millitm * 1000L;
97a93095
EZ		 2462 /* Implementation note: _ftime sometimes doesn't update the dstflag
2463 according to the new timezone when the system timezone is
2464 changed. We could fix that by using GetSystemTime and
2465 GetTimeZoneInformation, but that doesn't seem necessary, since
2466 Emacs always calls gettimeofday with the 2nd argument NULL (see
e9a9ae03 2467 current_emacs_time). */
177c0ea7 2468 if (tz)
35f0d482
KH		 2469 {
2470 tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */
2471 tz->tz_dsttime = tb.dstflag; /* type of dst correction */
2472 }
97dababa 2473 return 0;
35f0d482 2474}
35f0d482 2475
388cdec0
EZ		 2476/* Emulate fdutimens. */
2477
2478/* Set the access and modification time stamps of FD (a.k.a. FILE) to be
2479 TIMESPEC[0] and TIMESPEC[1], respectively.
2480 FD must be either negative -- in which case it is ignored --
2481 or a file descriptor that is open on FILE.
2482 If FD is nonnegative, then FILE can be NULL, which means
2483 use just futimes instead of utimes.
2484 If TIMESPEC is null, FAIL.
2485 Return 0 on success, -1 (setting errno) on failure. */
2486
2487int
2488fdutimens (int fd, char const *file, struct timespec const timespec[2])
2489{
2490 struct _utimbuf ut;
2491
2492 if (!timespec)
2493 {
2494 errno = ENOSYS;
2495 return -1;
2496 }
2497 if (fd < 0 && !file)
2498 {
2499 errno = EBADF;
2500 return -1;
2501 }
2502 ut.actime = timespec[0].tv_sec;
2503 ut.modtime = timespec[1].tv_sec;
2504 if (fd >= 0)
2505 return _futime (fd, &ut);
2506 else
2507 return _utime (file, &ut);
2508}
2509
2510
480b0c5b 2511/* ------------------------------------------------------------------------- */
b46a6a83 2512/* IO support and wrapper functions for the Windows API. */
480b0c5b 2513/* ------------------------------------------------------------------------- */
95ed0025 2514
480b0c5b 2515/* Place a wrapper around the MSVC version of ctime. It returns NULL
177c0ea7 2516 on network directories, so we handle that case here.
480b0c5b
GV		 2517 (Ulrich Leodolter, 1/11/95). */
2518char *
2519sys_ctime (const time_t *t)
2520{
2521 char *str = (char *) ctime (t);
2522 return (str ? str : "Sun Jan 01 00:00:00 1970");
2523}
2524
2525/* Emulate sleep...we could have done this with a define, but that
2526 would necessitate including windows.h in the files that used it.
2527 This is much easier. */
2528void
2529sys_sleep (int seconds)
2530{
2531 Sleep (seconds * 1000);
2532}
2533
76b3903d 2534/* Internal MSVC functions for low-level descriptor munging */
480b0c5b
GV		 2535extern int __cdecl _set_osfhnd (int fd, long h);
2536extern int __cdecl _free_osfhnd (int fd);
2537
2538/* parallel array of private info on file handles */
2539filedesc fd_info [ MAXDESC ];
2540
76b3903d
GV		 2541typedef struct volume_info_data {
2542 struct volume_info_data * next;
2543
2544 /* time when info was obtained */
2545 DWORD timestamp;
2546
2547 /* actual volume info */
2548 char * root_dir;
480b0c5b
GV		 2549 DWORD serialnum;
2550 DWORD maxcomp;
2551 DWORD flags;
76b3903d
GV		 2552 char * name;
2553 char * type;
2554} volume_info_data;
2555
2556/* Global referenced by various functions. */
2557static volume_info_data volume_info;
2558
2559/* Vector to indicate which drives are local and fixed (for which cached
2560 data never expires). */
2561static BOOL fixed_drives[26];
2562
2563/* Consider cached volume information to be stale if older than 10s,
2564 at least for non-local drives. Info for fixed drives is never stale. */
2565#define DRIVE_INDEX( c ) ( (c) <= 'Z' ? (c) - 'A' : (c) - 'a' )
2566#define VOLINFO_STILL_VALID( root_dir, info ) \
2567 ( ( isalpha (root_dir[0]) && \
2568 fixed_drives[ DRIVE_INDEX (root_dir[0]) ] ) \
2569 || GetTickCount () - info->timestamp < 10000 )
2570
2571/* Cache support functions. */
2572
2573/* Simple linked list with linear search is sufficient. */
2574static volume_info_data *volume_cache = NULL;
2575
2576static volume_info_data *
2577lookup_volume_info (char * root_dir)
2578{
2579 volume_info_data * info;
2580
2581 for (info = volume_cache; info; info = info->next)
05131107 2582 if (xstrcasecmp (info->root_dir, root_dir) == 0)
76b3903d
GV		 2583 break;
2584 return info;
2585}
2586
2587static void
2588add_volume_info (char * root_dir, volume_info_data * info)
2589{
a302c7ae 2590 info->root_dir = xstrdup (root_dir);
76b3903d
GV		 2591 info->next = volume_cache;
2592 volume_cache = info;
2593}
2594
2595
2596/* Wrapper for GetVolumeInformation, which uses caching to avoid
2597 performance penalty (~2ms on 486 for local drives, 7.5ms for local
2598 cdrom drive, ~5-10ms or more for remote drives on LAN). */
bedf4aab 2599static volume_info_data *
76b3903d
GV		 2600GetCachedVolumeInformation (char * root_dir)
2601{
2602 volume_info_data * info;
2603 char default_root[ MAX_PATH ];
2604
2605 /* NULL for root_dir means use root from current directory. */
2606 if (root_dir == NULL)
2607 {
2608 if (GetCurrentDirectory (MAX_PATH, default_root) == 0)
2609 return NULL;
2610 parse_root (default_root, &root_dir);
2611 *root_dir = 0;
2612 root_dir = default_root;
2613 }
2614
2615 /* Local fixed drives can be cached permanently. Removable drives
2616 cannot be cached permanently, since the volume name and serial
2617 number (if nothing else) can change. Remote drives should be
2618 treated as if they are removable, since there is no sure way to
2619 tell whether they are or not. Also, the UNC association of drive
2620 letters mapped to remote volumes can be changed at any time (even
2621 by other processes) without notice.
177c0ea7 2622
76b3903d
GV		 2623 As a compromise, so we can benefit from caching info for remote
2624 volumes, we use a simple expiry mechanism to invalidate cache
2625 entries that are more than ten seconds old. */
2626
2627#if 0
2628 /* No point doing this, because WNetGetConnection is even slower than
2629 GetVolumeInformation, consistently taking ~50ms on a 486 (FWIW,
2630 GetDriveType is about the only call of this type which does not
2631 involve network access, and so is extremely quick). */
2632
2633 /* Map drive letter to UNC if remote. */
ed3751c8 2634 if (isalpha (root_dir[0]) && !fixed[DRIVE_INDEX (root_dir[0])])
76b3903d
GV		 2635 {
2636 char remote_name[ 256 ];
2637 char drive[3] = { root_dir[0], ':' };
2638
2639 if (WNetGetConnection (drive, remote_name, sizeof (remote_name))
2640 == NO_ERROR)
2641 /* do something */ ;
2642 }
2643#endif
2644
2645 info = lookup_volume_info (root_dir);
2646
2647 if (info == NULL || ! VOLINFO_STILL_VALID (root_dir, info))
94eab1c8
JB		 2648 {
2649 char name[ 256 ];
2650 DWORD serialnum;
2651 DWORD maxcomp;
2652 DWORD flags;
2653 char type[ 256 ];
2654
2655 /* Info is not cached, or is stale. */
2656 if (!GetVolumeInformation (root_dir,
2657 name, sizeof (name),
2658 &serialnum,
2659 &maxcomp,
2660 &flags,
2661 type, sizeof (type)))
2662 return NULL;
76b3903d 2663
94eab1c8
JB		 2664 /* Cache the volume information for future use, overwriting existing
2665 entry if present. */
2666 if (info == NULL)
2667 {
23f86fce 2668 info = xmalloc (sizeof (volume_info_data));
94eab1c8
JB		 2669 add_volume_info (root_dir, info);
2670 }
2671 else
2672 {
2673 xfree (info->name);
2674 xfree (info->type);
2675 }
2676
2677 info->name = xstrdup (name);
2678 info->serialnum = serialnum;
2679 info->maxcomp = maxcomp;
2680 info->flags = flags;
2681 info->type = xstrdup (type);
2682 info->timestamp = GetTickCount ();
2683 }
76b3903d
GV		 2684
2685 return info;
2686}
480b0c5b 2687
6dad7178
EZ		 2688/* Get information on the volume where NAME is held; set path pointer to
2689 start of pathname in NAME (past UNC header\volume header if present),
2690 if pPath is non-NULL.
2691
2692 Note: if NAME includes symlinks, the information is for the volume
2693 of the symlink, not of its target. That's because, even though
2694 GetVolumeInformation returns information about the symlink target
2695 of its argument, we only pass the root directory to
2696 GetVolumeInformation, not the full NAME. */
bedf4aab 2697static int
480b0c5b 2698get_volume_info (const char * name, const char ** pPath)
95ed0025 2699{
480b0c5b
GV		 2700 char temp[MAX_PATH];
2701 char *rootname = NULL; /* default to current volume */
76b3903d 2702 volume_info_data * info;
480b0c5b
GV		 2703
2704 if (name == NULL)
2705 return FALSE;
2706
6dad7178 2707 /* Find the root name of the volume if given. */
480b0c5b
GV		 2708 if (isalpha (name[0]) && name[1] == ':')
2709 {
2710 rootname = temp;
2711 temp[0] = *name++;
2712 temp[1] = *name++;
2713 temp[2] = '\\';
2714 temp[3] = 0;
2715 }
2716 else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1]))
95ed0025 2717 {
480b0c5b
GV		 2718 char *str = temp;
2719 int slashes = 4;
806fed21
EZ		 2720 int dbcs_p = max_filename_mbslen () > 1;
2721
480b0c5b
GV		 2722 rootname = temp;
2723 do
2724 {
2725 if (IS_DIRECTORY_SEP (*name) && --slashes == 0)
2726 break;
806fed21
EZ		 2727 if (!dbcs_p)
2728 *str++ = *name++;
2729 else
2730 {
2731 const char *p = name;
2732
2733 name = CharNextExA (file_name_codepage, name, 0);
2734 memcpy (str, p, name - p);
2735 str += name - p;
2736 }
480b0c5b
GV		 2737 }
2738 while ( *name );
2739
480b0c5b
GV		 2740 *str++ = '\\';
2741 *str = 0;
95ed0025 2742 }
480b0c5b
GV		 2743
2744 if (pPath)
2745 *pPath = name;
177c0ea7 2746
76b3903d
GV		 2747 info = GetCachedVolumeInformation (rootname);
2748 if (info != NULL)
95ed0025 2749 {
76b3903d
GV		 2750 /* Set global referenced by other functions. */
2751 volume_info = *info;
480b0c5b 2752 return TRUE;
95ed0025 2753 }
480b0c5b
GV		 2754 return FALSE;
2755}
2756
2757/* Determine if volume is FAT format (ie. only supports short 8.3
6dad7178
EZ		 2758 names); also set path pointer to start of pathname in name, if
2759 pPath is non-NULL. */
bedf4aab 2760static int
480b0c5b
GV		 2761is_fat_volume (const char * name, const char ** pPath)
2762{
2763 if (get_volume_info (name, pPath))
2764 return (volume_info.maxcomp == 12);
2765 return FALSE;
2766}
2767
6dad7178
EZ		 2768/* Map filename to a valid 8.3 name if necessary.
2769 The result is a pointer to a static buffer, so CAVEAT EMPTOR! */
480b0c5b 2770const char *
fbd6baed 2771map_w32_filename (const char * name, const char ** pPath)
480b0c5b
GV		 2772{
2773 static char shortname[MAX_PATH];
2774 char * str = shortname;
2775 char c;
480b0c5b 2776 char * path;
76b3903d 2777 const char * save_name = name;
480b0c5b 2778
ca149beb
AI		 2779 if (strlen (name) >= MAX_PATH)
2780 {
2781 /* Return a filename which will cause callers to fail. */
2782 strcpy (shortname, "?");
2783 return shortname;
2784 }
2785
a302c7ae 2786 if (is_fat_volume (name, (const char **)&path)) /* truncate to 8.3 */
95ed0025 2787 {
480b0c5b
GV		 2788 register int left = 8; /* maximum number of chars in part */
2789 register int extn = 0; /* extension added? */
2790 register int dots = 2; /* maximum number of dots allowed */
2791
2792 while (name < path)
2793 *str++ = *name++; /* skip past UNC header */
2794
2795 while ((c = *name++))
2796 {
2797 switch ( c )
2798 {
6dad7178 2799 case ':':
480b0c5b
GV		 2800 case '\\':
2801 case '/':
6dad7178 2802 *str++ = (c == ':' ? ':' : '\\');
480b0c5b
GV		 2803 extn = 0; /* reset extension flags */
2804 dots = 2; /* max 2 dots */
2805 left = 8; /* max length 8 for main part */
2806 break;
2807 case '.':
2808 if ( dots )
2809 {
2810 /* Convert path components of the form .xxx to _xxx,
2811 but leave . and .. as they are. This allows .emacs
2812 to be read as _emacs, for example. */
2813
2814 if (! *name ||
2815 *name == '.' ||
2816 IS_DIRECTORY_SEP (*name))
2817 {
2818 *str++ = '.';
2819 dots--;
2820 }
2821 else
2822 {
2823 *str++ = '_';
2824 left--;
2825 dots = 0;
2826 }
2827 }
2828 else if ( !extn )
2829 {
2830 *str++ = '.';
2831 extn = 1; /* we've got an extension */
2832 left = 3; /* 3 chars in extension */
2833 }
2834 else
2835 {
2836 /* any embedded dots after the first are converted to _ */
2837 *str++ = '_';
2838 }
2839 break;
2840 case '~':
2841 case '#': /* don't lose these, they're important */
2842 if ( ! left )
2843 str[-1] = c; /* replace last character of part */
2844 /* FALLTHRU */
2845 default:
2846 if ( left )
2847 {
2848 *str++ = tolower (c); /* map to lower case (looks nicer) */
2849 left--;
2850 dots = 0; /* started a path component */
2851 }
2852 break;
2853 }
2854 }
2855 *str = '\0';
fc85cb29
RS		 2856 }
2857 else
2858 {
2859 strcpy (shortname, name);
2860 unixtodos_filename (shortname);
95ed0025 2861 }
480b0c5b
GV		 2862
2863 if (pPath)
76b3903d 2864 *pPath = shortname + (path - save_name);
480b0c5b 2865
fc85cb29 2866 return shortname;
480b0c5b
GV		 2867}
2868
b3308d2e
KH		 2869static int
2870is_exec (const char * name)
2871{
2872 char * p = strrchr (name, '.');
2873 return
2874 (p != NULL
05131107
JR		 2875 && (xstrcasecmp (p, ".exe") == 0 ||
2876 xstrcasecmp (p, ".com") == 0 ||
2877 xstrcasecmp (p, ".bat") == 0 ||
2878 xstrcasecmp (p, ".cmd") == 0));
b3308d2e
KH		 2879}
2880
177c0ea7 2881/* Emulate the Unix directory procedures opendir, closedir,
76b3903d
GV		 2882 and readdir. We can't use the procedures supplied in sysdep.c,
2883 so we provide them here. */
2884
95ef7787 2885struct dirent dir_static; /* simulated directory contents */
76b3903d
GV		 2886static HANDLE dir_find_handle = INVALID_HANDLE_VALUE;
2887static int dir_is_fat;
2888static char dir_pathname[MAXPATHLEN+1];
2889static WIN32_FIND_DATA dir_find_data;
2890
9d3355d1
GV		 2891/* Support shares on a network resource as subdirectories of a read-only
2892 root directory. */
2893static HANDLE wnet_enum_handle = INVALID_HANDLE_VALUE;
bedf4aab
JB		 2894static HANDLE open_unc_volume (const char *);
2895static char *read_unc_volume (HANDLE, char *, int);
2896static void close_unc_volume (HANDLE);
9d3355d1 2897
76b3903d 2898DIR *
cf01a359 2899opendir (const char *filename)
76b3903d
GV		 2900{
2901 DIR *dirp;
2902
2903 /* Opening is done by FindFirstFile. However, a read is inherent to
2904 this operation, so we defer the open until read time. */
2905
76b3903d
GV		 2906 if (dir_find_handle != INVALID_HANDLE_VALUE)
2907 return NULL;
9d3355d1
GV		 2908 if (wnet_enum_handle != INVALID_HANDLE_VALUE)
2909 return NULL;
2910
6dad7178
EZ		 2911 /* Note: We don't support traversal of UNC volumes via symlinks.
2912 Doing so would mean punishing 99.99% of use cases by resolving
2913 all the possible symlinks in FILENAME, recursively. */
9d3355d1
GV		 2914 if (is_unc_volume (filename))
2915 {
2916 wnet_enum_handle = open_unc_volume (filename);
2917 if (wnet_enum_handle == INVALID_HANDLE_VALUE)
2918 return NULL;
2919 }
2920
2921 if (!(dirp = (DIR *) malloc (sizeof (DIR))))
2922 return NULL;
76b3903d
GV		 2923
2924 dirp->dd_fd = 0;
2925 dirp->dd_loc = 0;
2926 dirp->dd_size = 0;
2927
2928 strncpy (dir_pathname, map_w32_filename (filename, NULL), MAXPATHLEN);
2929 dir_pathname[MAXPATHLEN] = '\0';
6dad7178
EZ		 2930 /* Note: We don't support symlinks to file names on FAT volumes.
2931 Doing so would mean punishing 99.99% of use cases by resolving
2932 all the possible symlinks in FILENAME, recursively. */
76b3903d
GV		 2933 dir_is_fat = is_fat_volume (filename, NULL);
2934
2935 return dirp;
2936}
2937
2938void
2939closedir (DIR *dirp)
2940{
2941 /* If we have a find-handle open, close it. */
2942 if (dir_find_handle != INVALID_HANDLE_VALUE)
2943 {
2944 FindClose (dir_find_handle);
2945 dir_find_handle = INVALID_HANDLE_VALUE;
2946 }
9d3355d1
GV		 2947 else if (wnet_enum_handle != INVALID_HANDLE_VALUE)
2948 {
2949 close_unc_volume (wnet_enum_handle);
2950 wnet_enum_handle = INVALID_HANDLE_VALUE;
2951 }
76b3903d
GV		 2952 xfree ((char *) dirp);
2953}
2954
95ef7787 2955struct dirent *
76b3903d
GV		 2956readdir (DIR *dirp)
2957{
b07103dc
EZ		 2958 int downcase = !NILP (Vw32_downcase_file_names);
2959
9d3355d1
GV		 2960 if (wnet_enum_handle != INVALID_HANDLE_VALUE)
2961 {
177c0ea7 2962 if (!read_unc_volume (wnet_enum_handle,
59eb0929
JB		 2963 dir_find_data.cFileName,
2964 MAX_PATH))
9d3355d1
GV		 2965 return NULL;
2966 }
76b3903d 2967 /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */
9d3355d1 2968 else if (dir_find_handle == INVALID_HANDLE_VALUE)
76b3903d
GV		 2969 {
2970 char filename[MAXNAMLEN + 3];
2971 int ln;
806fed21 2972 int dbcs_p = max_filename_mbslen () > 1;
76b3903d
GV		 2973
2974 strcpy (filename, dir_pathname);
2975 ln = strlen (filename) - 1;
806fed21
EZ		 2976 if (!dbcs_p)
2977 {
2978 if (!IS_DIRECTORY_SEP (filename[ln]))
2979 strcat (filename, "\\");
2980 }
2981 else
2982 {
2983 char *end = filename + ln + 1;
2984 char *last_char = CharPrevExA (file_name_codepage, filename, end, 0);
2985
2986 if (!IS_DIRECTORY_SEP (*last_char))
2987 strcat (filename, "\\");
2988 }
76b3903d
GV		 2989 strcat (filename, "*");
2990
6dad7178
EZ		 2991 /* Note: No need to resolve symlinks in FILENAME, because
2992 FindFirst opens the directory that is the target of a
2993 symlink. */
76b3903d
GV		 2994 dir_find_handle = FindFirstFile (filename, &dir_find_data);
2995
2996 if (dir_find_handle == INVALID_HANDLE_VALUE)
2997 return NULL;
2998 }
2999 else
3000 {
3001 if (!FindNextFile (dir_find_handle, &dir_find_data))
3002 return NULL;
3003 }
177c0ea7 3004
76b3903d
GV		 3005 /* Emacs never uses this value, so don't bother making it match
3006 value returned by stat(). */
3007 dir_static.d_ino = 1;
177c0ea7 3008
b07103dc
EZ		 3009 strcpy (dir_static.d_name, dir_find_data.cFileName);
3010
3011 /* If the file name in cFileName[] includes `?' characters, it means
3012 the original file name used characters that cannot be represented
3013 by the current ANSI codepage. To avoid total lossage, retrieve
3014 the short 8+3 alias of the long file name. */
3015 if (_mbspbrk (dir_static.d_name, "?"))
3016 {
3017 strcpy (dir_static.d_name, dir_find_data.cAlternateFileName);
3018 downcase = 1; /* 8+3 aliases are returned in all caps */
3019 }
3020 dir_static.d_namlen = strlen (dir_static.d_name);
95ef7787 3021 dir_static.d_reclen = sizeof (struct dirent) - MAXNAMLEN + 3 +
76b3903d 3022 dir_static.d_namlen - dir_static.d_namlen % 4;
177c0ea7 3023
192788d7
EZ		 3024 /* If the file name in cFileName[] includes `?' characters, it means
3025 the original file name used characters that cannot be represented
3026 by the current ANSI codepage. To avoid total lossage, retrieve
3027 the short 8+3 alias of the long file name. */
3028 if (_mbspbrk (dir_find_data.cFileName, "?"))
3029 {
3030 strcpy (dir_static.d_name, dir_find_data.cAlternateFileName);
3031 /* 8+3 aliases are returned in all caps, which could break
3032 various alists that look at filenames' extensions. */
3033 downcase = 1;
3034 }
3035 else
3036 strcpy (dir_static.d_name, dir_find_data.cFileName);
3037 dir_static.d_namlen = strlen (dir_static.d_name);
76b3903d 3038 if (dir_is_fat)
6d2851de 3039 _mbslwr (dir_static.d_name);
b07103dc 3040 else if (downcase)
76b3903d
GV		 3041 {
3042 register char *p;
6d2851de
EZ		 3043 int dbcs_p = max_filename_mbslen () > 1;
3044 for (p = dir_static.d_name; *p; )
3045 {
3046 if (*p >= 'a' && *p <= 'z')
3047 break;
3048 if (dbcs_p)
3049 p = CharNextExA (file_name_codepage, p, 0);
3050 else
3051 p++;
3052 }
76b3903d 3053 if (!*p)
6d2851de 3054 _mbslwr (dir_static.d_name);
76b3903d 3055 }
177c0ea7 3056
76b3903d
GV		 3057 return &dir_static;
3058}
3059
bedf4aab 3060static HANDLE
e0c181dd 3061open_unc_volume (const char *path)
9d3355d1 3062{
177c0ea7 3063 NETRESOURCE nr;
9d3355d1
GV		 3064 HANDLE henum;
3065 int result;
3066
177c0ea7
JB		 3067 nr.dwScope = RESOURCE_GLOBALNET;
3068 nr.dwType = RESOURCETYPE_DISK;
3069 nr.dwDisplayType = RESOURCEDISPLAYTYPE_SERVER;
3070 nr.dwUsage = RESOURCEUSAGE_CONTAINER;
3071 nr.lpLocalName = NULL;
6e602566 3072 nr.lpRemoteName = (LPSTR)map_w32_filename (path, NULL);
177c0ea7
JB		 3073 nr.lpComment = NULL;
3074 nr.lpProvider = NULL;
9d3355d1 3075
ed3751c8
JB		 3076 result = WNetOpenEnum (RESOURCE_GLOBALNET, RESOURCETYPE_DISK,
3077 RESOURCEUSAGE_CONNECTABLE, &nr, &henum);
9d3355d1
GV		 3078
3079 if (result == NO_ERROR)
3080 return henum;
3081 else
3082 return INVALID_HANDLE_VALUE;
3083}
3084
bedf4aab 3085static char *
9d3355d1
GV		 3086read_unc_volume (HANDLE henum, char *readbuf, int size)
3087{
a302c7ae 3088 DWORD count;
9d3355d1 3089 int result;
a302c7ae 3090 DWORD bufsize = 512;
9d3355d1
GV		 3091 char *buffer;
3092 char *ptr;
806fed21 3093 int dbcs_p = max_filename_mbslen () > 1;
9d3355d1
GV		 3094
3095 count = 1;
3096 buffer = alloca (bufsize);
59eb0929 3097 result = WNetEnumResource (henum, &count, buffer, &bufsize);
9d3355d1
GV		 3098 if (result != NO_ERROR)
3099 return NULL;
3100
3101 /* WNetEnumResource returns \\resource\share...skip forward to "share". */
3102 ptr = ((LPNETRESOURCE) buffer)->lpRemoteName;
3103 ptr += 2;
806fed21
EZ		 3104 if (!dbcs_p)
3105 while (*ptr && !IS_DIRECTORY_SEP (*ptr)) ptr++;
3106 else
3107 {
3108 while (*ptr && !IS_DIRECTORY_SEP (*ptr))
3109 ptr = CharNextExA (file_name_codepage, ptr, 0);
3110 }
9d3355d1
GV		 3111 ptr++;
3112
3113 strncpy (readbuf, ptr, size);
3114 return readbuf;
3115}
3116
bedf4aab 3117static void
9d3355d1
GV		 3118close_unc_volume (HANDLE henum)
3119{
3120 if (henum != INVALID_HANDLE_VALUE)
3121 WNetCloseEnum (henum);
3122}
3123
bedf4aab 3124static DWORD
e0c181dd 3125unc_volume_file_attributes (const char *path)
9d3355d1
GV		 3126{
3127 HANDLE henum;
3128 DWORD attrs;
3129
3130 henum = open_unc_volume (path);
3131 if (henum == INVALID_HANDLE_VALUE)
3132 return -1;
3133
3134 attrs = FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_DIRECTORY;
3135
3136 close_unc_volume (henum);
3137
3138 return attrs;
3139}
3140
302d7d54
JR		 3141/* Ensure a network connection is authenticated. */
3142static void
3143logon_network_drive (const char *path)
3144{
3145 NETRESOURCE resource;
3146 char share[MAX_PATH];
806fed21 3147 int n_slashes;
40a339c8 3148 char drive[4];
be4c6380 3149 UINT drvtype;
806fed21
EZ		 3150 char *p;
3151 int dbcs_p;
40a339c8 3152
be4c6380
EZ		 3153 if (IS_DIRECTORY_SEP (path[0]) && IS_DIRECTORY_SEP (path[1]))
3154 drvtype = DRIVE_REMOTE;
3155 else if (path[0] == '\0' || path[1] != ':')
3156 drvtype = GetDriveType (NULL);
3157 else
3158 {
3159 drive[0] = path[0];
3160 drive[1] = ':';
3161 drive[2] = '\\';
3162 drive[3] = '\0';
3163 drvtype = GetDriveType (drive);
3164 }
302d7d54
JR		 3165
3166 /* Only logon to networked drives. */
be4c6380 3167 if (drvtype != DRIVE_REMOTE)
302d7d54 3168 return;
40a339c8 3169
302d7d54
JR		 3170 n_slashes = 2;
3171 strncpy (share, path, MAX_PATH);
3172 /* Truncate to just server and share name. */
806fed21
EZ		 3173 dbcs_p = max_filename_mbslen () > 1;
3174 for (p = share + 2; *p && p < share + MAX_PATH; )
302d7d54 3175 {
806fed21 3176 if (IS_DIRECTORY_SEP (*p) && ++n_slashes > 3)
302d7d54 3177 {
806fed21 3178 *p = '\0';
302d7d54
JR		 3179 break;
3180 }
806fed21
EZ		 3181 if (dbcs_p)
3182 p = CharNextExA (file_name_codepage, p, 0);
3183 else
3184 p++;
302d7d54
JR		 3185 }
3186
3187 resource.dwType = RESOURCETYPE_DISK;
3188 resource.lpLocalName = NULL;
3189 resource.lpRemoteName = share;
3190 resource.lpProvider = NULL;
3191
3192 WNetAddConnection2 (&resource, NULL, NULL, CONNECT_INTERACTIVE);
3193}
480b0c5b 3194
14f20728 3195/* Emulate faccessat(2). */
480b0c5b 3196int
14f20728 3197faccessat (int dirfd, const char * path, int mode, int flags)
480b0c5b 3198{
b3308d2e
KH		 3199 DWORD attributes;
3200
14f20728
EZ		 3201 if (dirfd != AT_FDCWD
3202 && !(IS_DIRECTORY_SEP (path[0])
3203 || IS_DEVICE_SEP (path[1])))
73dcdb9f
PE		 3204 {
3205 errno = EBADF;
3206 return -1;
3207 }
3208
8d38f461
EZ		 3209 /* MSVCRT implementation of 'access' doesn't recognize D_OK, and its
3210 newer versions blow up when passed D_OK. */
b3308d2e 3211 path = map_w32_filename (path, NULL);
6dad7178
EZ		 3212 /* If the last element of PATH is a symlink, we need to resolve it
3213 to get the attributes of its target file. Note: any symlinks in
3214 PATH elements other than the last one are transparently resolved
3215 by GetFileAttributes below. */
14f20728
EZ		 3216 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0
3217 && (flags & AT_SYMLINK_NOFOLLOW) == 0)
6dad7178
EZ		 3218 path = chase_symlinks (path);
3219
3220 if ((attributes = GetFileAttributes (path)) == -1)
b3308d2e 3221 {
8d38f461
EZ		 3222 DWORD w32err = GetLastError ();
3223
3224 switch (w32err)
3225 {
6dad7178
EZ		 3226 case ERROR_INVALID_NAME:
3227 case ERROR_BAD_PATHNAME:
3228 if (is_unc_volume (path))
3229 {
3230 attributes = unc_volume_file_attributes (path);
3231 if (attributes == -1)
3232 {
3233 errno = EACCES;
3234 return -1;
3235 }
3236 break;
3237 }
3238 /* FALLTHROUGH */
8d38f461 3239 case ERROR_FILE_NOT_FOUND:
6dad7178 3240 case ERROR_BAD_NETPATH:
8d38f461
EZ		 3241 errno = ENOENT;
3242 break;
3243 default:
3244 errno = EACCES;
3245 break;
3246 }
b3308d2e
KH		 3247 return -1;
3248 }
6ad30855
EZ		 3249 if ((mode & X_OK) != 0
3250 && !(is_exec (path) || (attributes & FILE_ATTRIBUTE_DIRECTORY) != 0))
b3308d2e
KH		 3251 {
3252 errno = EACCES;
3253 return -1;
3254 }
3255 if ((mode & W_OK) != 0 && (attributes & FILE_ATTRIBUTE_READONLY) != 0)
3256 {
3257 errno = EACCES;
3258 return -1;
3259 }
3260 if ((mode & D_OK) != 0 && (attributes & FILE_ATTRIBUTE_DIRECTORY) == 0)
3261 {
3262 errno = EACCES;
3263 return -1;
3264 }
3265 return 0;
480b0c5b
GV		 3266}
3267
14f20728
EZ		 3268/* Shadow some MSVC runtime functions to map requests for long filenames
3269 to reasonable short names if necessary. This was originally added to
3270 permit running Emacs on NT 3.1 on a FAT partition, which doesn't support
3271 long file names. */
3272
480b0c5b
GV		 3273int
3274sys_chdir (const char * path)
3275{
fbd6baed 3276 return _chdir (map_w32_filename (path, NULL));
480b0c5b
GV		 3277}
3278
3279int
3280sys_chmod (const char * path, int mode)
3281{
6dad7178
EZ		 3282 path = chase_symlinks (map_w32_filename (path, NULL));
3283 return _chmod (path, mode);
480b0c5b
GV		 3284}
3285
3286int
3287sys_creat (const char * path, int mode)
3288{
fbd6baed 3289 return _creat (map_w32_filename (path, NULL), mode);
480b0c5b
GV		 3290}
3291
3292FILE *
b56ceb92 3293sys_fopen (const char * path, const char * mode)
480b0c5b
GV		 3294{
3295 int fd;
3296 int oflag;
3297 const char * mode_save = mode;
3298
3299 /* Force all file handles to be non-inheritable. This is necessary to
3300 ensure child processes don't unwittingly inherit handles that might
3301 prevent future file access. */
3302
3303 if (mode[0] == 'r')
3304 oflag = O_RDONLY;
3305 else if (mode[0] == 'w' || mode[0] == 'a')
3306 oflag = O_WRONLY | O_CREAT | O_TRUNC;
95ed0025 3307 else
480b0c5b
GV		 3308 return NULL;
3309
3310 /* Only do simplistic option parsing. */
3311 while (*++mode)
3312 if (mode[0] == '+')
3313 {
3314 oflag &= ~(O_RDONLY | O_WRONLY);
3315 oflag |= O_RDWR;
3316 }
3317 else if (mode[0] == 'b')
3318 {
3319 oflag &= ~O_TEXT;
3320 oflag |= O_BINARY;
3321 }
3322 else if (mode[0] == 't')
3323 {
3324 oflag &= ~O_BINARY;
3325 oflag |= O_TEXT;
3326 }
3327 else break;
3328
fbd6baed 3329 fd = _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, 0644);
480b0c5b
GV		 3330 if (fd < 0)
3331 return NULL;
3332
76b3903d 3333 return _fdopen (fd, mode_save);
95ed0025 3334}
480b0c5b 3335
76b3903d 3336/* This only works on NTFS volumes, but is useful to have. */
480b0c5b 3337int
76b3903d 3338sys_link (const char * old, const char * new)
480b0c5b 3339{
76b3903d
GV		 3340 HANDLE fileh;
3341 int result = -1;
3342 char oldname[MAX_PATH], newname[MAX_PATH];
3343
3344 if (old == NULL || new == NULL)
3345 {
3346 errno = ENOENT;
3347 return -1;
3348 }
3349
3350 strcpy (oldname, map_w32_filename (old, NULL));
3351 strcpy (newname, map_w32_filename (new, NULL));
3352
3353 fileh = CreateFile (oldname, 0, 0, NULL, OPEN_EXISTING,
3354 FILE_FLAG_BACKUP_SEMANTICS, NULL);
3355 if (fileh != INVALID_HANDLE_VALUE)
3356 {
3357 int wlen;
3358
3359 /* Confusingly, the "alternate" stream name field does not apply
3360 when restoring a hard link, and instead contains the actual
3361 stream data for the link (ie. the name of the link to create).
3362 The WIN32_STREAM_ID structure before the cStreamName field is
3363 the stream header, which is then immediately followed by the
3364 stream data. */
3365
3366 struct {
3367 WIN32_STREAM_ID wid;
3368 WCHAR wbuffer[MAX_PATH]; /* extra space for link name */
3369 } data;
3370
3371 wlen = MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, newname, -1,
3372 data.wid.cStreamName, MAX_PATH);
3373 if (wlen > 0)
3374 {
3375 LPVOID context = NULL;
3376 DWORD wbytes = 0;
3377
3378 data.wid.dwStreamId = BACKUP_LINK;
3379 data.wid.dwStreamAttributes = 0;
ed3751c8 3380 data.wid.Size.LowPart = wlen * sizeof (WCHAR);
76b3903d
GV		 3381 data.wid.Size.HighPart = 0;
3382 data.wid.dwStreamNameSize = 0;
3383
3384 if (BackupWrite (fileh, (LPBYTE)&data,
3385 offsetof (WIN32_STREAM_ID, cStreamName)
3386 + data.wid.Size.LowPart,
3387 &wbytes, FALSE, FALSE, &context)
3388 && BackupWrite (fileh, NULL, 0, &wbytes, TRUE, FALSE, &context))
3389 {
3390 /* succeeded */
3391 result = 0;
3392 }
3393 else
3394 {
3395 /* Should try mapping GetLastError to errno; for now just
3396 indicate a general error (eg. links not supported). */
3397 errno = EINVAL; // perhaps EMLINK?
3398 }
3399 }
3400
3401 CloseHandle (fileh);
3402 }
3403 else
3404 errno = ENOENT;
3405
3406 return result;
480b0c5b
GV		 3407}
3408
3409int
3410sys_mkdir (const char * path)
3411{
fbd6baed 3412 return _mkdir (map_w32_filename (path, NULL));
480b0c5b
GV		 3413}
3414
9d1778b1
RS		 3415/* Because of long name mapping issues, we need to implement this
3416 ourselves. Also, MSVC's _mktemp returns NULL when it can't generate
3417 a unique name, instead of setting the input template to an empty
3418 string.
3419
3420 Standard algorithm seems to be use pid or tid with a letter on the
3421 front (in place of the 6 X's) and cycle through the letters to find a
3422 unique name. We extend that to allow any reasonable character as the
3423 first of the 6 X's. */
480b0c5b
GV		 3424char *
3425sys_mktemp (char * template)
3426{
9d1778b1
RS		 3427 char * p;
3428 int i;
3429 unsigned uid = GetCurrentThreadId ();
3430 static char first_char[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#";
3431
3432 if (template == NULL)
3433 return NULL;
3434 p = template + strlen (template);
3435 i = 5;
3436 /* replace up to the last 5 X's with uid in decimal */
3437 while (--p >= template && p[0] == 'X' && --i >= 0)
3438 {
3439 p[0] = '0' + uid % 10;
3440 uid /= 10;
3441 }
3442
3443 if (i < 0 && p[0] == 'X')
3444 {
3445 i = 0;
3446 do
3447 {
3448 int save_errno = errno;
3449 p[0] = first_char[i];
14f20728 3450 if (faccessat (AT_FDCWD, template, F_OK, AT_EACCESS) < 0)
9d1778b1
RS		 3451 {
3452 errno = save_errno;
3453 return template;
3454 }
3455 }
3456 while (++i < sizeof (first_char));
3457 }
3458
3459 /* Template is badly formed or else we can't generate a unique name,
3460 so return empty string */
3461 template[0] = 0;
3462 return template;
480b0c5b
GV		 3463}
3464
3465int
3466sys_open (const char * path, int oflag, int mode)
3467{
302f0b29 3468 const char* mpath = map_w32_filename (path, NULL);
343a2aef
EZ		 3469 int res = -1;
3470
3471 /* If possible, try to open file without _O_CREAT, to be able to
3472 write to existing hidden and system files. Force all file
3473 handles to be non-inheritable. */
3474 if ((oflag & (_O_CREAT | _O_EXCL)) != (_O_CREAT | _O_EXCL))
3475 res = _open (mpath, (oflag & ~_O_CREAT) | _O_NOINHERIT, mode);
224f4ec1
EZ		 3476 if (res < 0)
3477 res = _open (mpath, oflag | _O_NOINHERIT, mode);
224f4ec1
EZ		 3478
3479 return res;
480b0c5b
GV		 3480}
3481
3482int
70743157
PE		 3483fchmod (int fd, mode_t mode)
3484{
3485 return 0;
3486}
3487
3488int
3489sys_rename_replace (const char *oldname, const char *newname, BOOL force)
480b0c5b 3490{
cfb5e855 3491 BOOL result;
b3308d2e 3492 char temp[MAX_PATH];
069d2b50
L		 3493 int newname_dev;
3494 int oldname_dev;
480b0c5b 3495
e9e23e23 3496 /* MoveFile on Windows 95 doesn't correctly change the short file name
5162ffce
MB		 3497 alias in a number of circumstances (it is not easy to predict when
3498 just by looking at oldname and newname, unfortunately). In these
3499 cases, renaming through a temporary name avoids the problem.
3500
e9e23e23 3501 A second problem on Windows 95 is that renaming through a temp name when
5162ffce
MB		 3502 newname is uppercase fails (the final long name ends up in
3503 lowercase, although the short alias might be uppercase) UNLESS the
3504 long temp name is not 8.3.
3505
e9e23e23 3506 So, on Windows 95 we always rename through a temp name, and we make sure
5162ffce 3507 the temp name has a long extension to ensure correct renaming. */
480b0c5b 3508
fbd6baed 3509 strcpy (temp, map_w32_filename (oldname, NULL));
480b0c5b 3510
069d2b50
L		 3511 /* volume_info is set indirectly by map_w32_filename. */
3512 oldname_dev = volume_info.serialnum;
3513
417a7a0e 3514 if (os_subtype == OS_9X)
480b0c5b 3515 {
b3308d2e 3516 char * o;
480b0c5b 3517 char * p;
b3308d2e
KH		 3518 int i = 0;
3519
3520 oldname = map_w32_filename (oldname, NULL);
657d08d3 3521 if ((o = strrchr (oldname, '\\')))
b3308d2e
KH		 3522 o++;
3523 else
3524 o = (char *) oldname;
480b0c5b 3525
657d08d3 3526 if ((p = strrchr (temp, '\\')))
480b0c5b
GV		 3527 p++;
3528 else
3529 p = temp;
b3308d2e
KH		 3530
3531 do
3532 {
3533 /* Force temp name to require a manufactured 8.3 alias - this
3534 seems to make the second rename work properly. */
f313ee82 3535 sprintf (p, "_.%s.%u", o, i);
b3308d2e 3536 i++;
58f0cb7e 3537 result = rename (oldname, temp);
b3308d2e
KH		 3538 }
3539 /* This loop must surely terminate! */
cfb5e855 3540 while (result < 0 && errno == EEXIST);
58f0cb7e 3541 if (result < 0)
480b0c5b
GV		 3542 return -1;
3543 }
3544
70743157 3545 /* If FORCE, emulate Unix behavior - newname is deleted if it already exists
5162ffce 3546 (at least if it is a file; don't do this for directories).
76b3903d 3547
b3308d2e
KH		 3548 Since we mustn't do this if we are just changing the case of the
3549 file name (we would end up deleting the file we are trying to
3550 rename!), we let rename detect if the destination file already
3551 exists - that way we avoid the possible pitfalls of trying to
3552 determine ourselves whether two names really refer to the same
3553 file, which is not always possible in the general case. (Consider
3554 all the permutations of shared or subst'd drives, etc.) */
3555
3556 newname = map_w32_filename (newname, NULL);
069d2b50
L		 3557
3558 /* volume_info is set indirectly by map_w32_filename. */
3559 newname_dev = volume_info.serialnum;
3560
eb9ea53f 3561 result = rename (temp, newname);
b3308d2e 3562
70743157 3563 if (result < 0 && force)
069d2b50 3564 {
6dad7178 3565 DWORD w32err = GetLastError ();
069d2b50
L		 3566
3567 if (errno == EACCES
3568 && newname_dev != oldname_dev)
3569 {
3570 /* The implementation of `rename' on Windows does not return
3571 errno = EXDEV when you are moving a directory to a
3572 different storage device (ex. logical disk). It returns
3573 EACCES instead. So here we handle such situations and
3574 return EXDEV. */
3575 DWORD attributes;
3576
3577 if ((attributes = GetFileAttributes (temp)) != -1
6dad7178 3578 && (attributes & FILE_ATTRIBUTE_DIRECTORY))
069d2b50
L		 3579 errno = EXDEV;
3580 }
3581 else if (errno == EEXIST)
3582 {
3583 if (_chmod (newname, 0666) != 0)
3584 return result;
3585 if (_unlink (newname) != 0)
3586 return result;
3587 result = rename (temp, newname);
3588 }
6dad7178
EZ		 3589 else if (w32err == ERROR_PRIVILEGE_NOT_HELD
3590 && is_symlink (temp))
3591 {
3592 /* This is Windows prohibiting the user from creating a
3593 symlink in another place, since that requires
3594 privileges. */
3595 errno = EPERM;
3596 }
069d2b50 3597 }
480b0c5b 3598
eb9ea53f 3599 return result;
480b0c5b
GV		 3600}
3601
70743157
PE		 3602int
3603sys_rename (char const *old, char const *new)
3604{
3605 return sys_rename_replace (old, new, TRUE);
3606}
3607
480b0c5b
GV		 3608int
3609sys_rmdir (const char * path)
3610{
fbd6baed 3611 return _rmdir (map_w32_filename (path, NULL));
480b0c5b
GV		 3612}
3613
3614int
3615sys_unlink (const char * path)
3616{
16bb7578
GV		 3617 path = map_w32_filename (path, NULL);
3618
3619 /* On Unix, unlink works without write permission. */
3620 _chmod (path, 0666);
3621 return _unlink (path);
480b0c5b
GV		 3622}
3623
3624static FILETIME utc_base_ft;
5da9424d 3625static ULONGLONG utc_base; /* In 100ns units */
480b0c5b
GV		 3626static int init = 0;
3627
5da9424d
JB		 3628#define FILETIME_TO_U64(result, ft) \
3629 do { \
3630 ULARGE_INTEGER uiTemp; \
3631 uiTemp.LowPart = (ft).dwLowDateTime; \
3632 uiTemp.HighPart = (ft).dwHighDateTime; \
3633 result = uiTemp.QuadPart; \
3634 } while (0)
3635
3636static void
b56ceb92 3637initialize_utc_base (void)
7c80d5ec 3638{
5da9424d
JB		 3639 /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */
3640 SYSTEMTIME st;
3641
3642 st.wYear = 1970;
3643 st.wMonth = 1;
3644 st.wDay = 1;
3645 st.wHour = 0;
3646 st.wMinute = 0;
3647 st.wSecond = 0;
3648 st.wMilliseconds = 0;
3649
3650 SystemTimeToFileTime (&st, &utc_base_ft);
3651 FILETIME_TO_U64 (utc_base, utc_base_ft);
7c80d5ec
EZ		 3652}
3653
480b0c5b
GV		 3654static time_t
3655convert_time (FILETIME ft)
3656{
5da9424d 3657 ULONGLONG tmp;
480b0c5b
GV		 3658
3659 if (!init)
3660 {
9d4f32e8 3661 initialize_utc_base ();
480b0c5b
GV		 3662 init = 1;
3663 }
3664
3665 if (CompareFileTime (&ft, &utc_base_ft) < 0)
3666 return 0;
3667
5da9424d
JB		 3668 FILETIME_TO_U64 (tmp, ft);
3669 return (time_t) ((tmp - utc_base) / 10000000L);
480b0c5b
GV		 3670}
3671
bedf4aab 3672static void
480b0c5b
GV		 3673convert_from_time_t (time_t time, FILETIME * pft)
3674{
5da9424d 3675 ULARGE_INTEGER tmp;
480b0c5b
GV		 3676
3677 if (!init)
3678 {
5da9424d 3679 initialize_utc_base ();
480b0c5b
GV		 3680 init = 1;
3681 }
3682
3683 /* time in 100ns units since 1-Jan-1601 */
5da9424d
JB		 3684 tmp.QuadPart = (ULONGLONG) time * 10000000L + utc_base;
3685 pft->dwHighDateTime = tmp.HighPart;
3686 pft->dwLowDateTime = tmp.LowPart;
480b0c5b 3687}
480b0c5b 3688
76b3903d
GV		 3689#if 0
3690/* No reason to keep this; faking inode values either by hashing or even
3691 using the file index from GetInformationByHandle, is not perfect and
3692 so by default Emacs doesn't use the inode values on Windows.
3693 Instead, we now determine file-truename correctly (except for
3694 possible drive aliasing etc). */
3695
3696/* Modified version of "PJW" algorithm (see the "Dragon" compiler book). */
480b0c5b 3697static unsigned
76b3903d 3698hashval (const unsigned char * str)
480b0c5b
GV		 3699{
3700 unsigned h = 0;
480b0c5b
GV		 3701 while (*str)
3702 {
3703 h = (h << 4) + *str++;
76b3903d 3704 h ^= (h >> 28);
480b0c5b
GV		 3705 }
3706 return h;
3707}
3708
3709/* Return the hash value of the canonical pathname, excluding the
3710 drive/UNC header, to get a hopefully unique inode number. */
76b3903d 3711static DWORD
480b0c5b
GV		 3712generate_inode_val (const char * name)
3713{
3714 char fullname[ MAX_PATH ];
3715 char * p;
3716 unsigned hash;
3717
76b3903d 3718 /* Get the truly canonical filename, if it exists. (Note: this
e1dbe924 3719 doesn't resolve aliasing due to subst commands, or recognize hard
76b3903d
GV		 3720 links. */
3721 if (!w32_get_long_filename ((char *)name, fullname, MAX_PATH))
1088b922 3722 emacs_abort ();
76b3903d
GV		 3723
3724 parse_root (fullname, &p);
fbd6baed 3725 /* Normal W32 filesystems are still case insensitive. */
480b0c5b 3726 _strlwr (p);
76b3903d 3727 return hashval (p);
480b0c5b
GV		 3728}
3729
76b3903d
GV		 3730#endif
3731
8aaaec6b 3732static PSECURITY_DESCRIPTOR
6dad7178
EZ		 3733get_file_security_desc_by_handle (HANDLE h)
3734{
3735 PSECURITY_DESCRIPTOR psd = NULL;
3736 DWORD err;
3737 SECURITY_INFORMATION si = OWNER_SECURITY_INFORMATION
3738 | GROUP_SECURITY_INFORMATION /* | DACL_SECURITY_INFORMATION */ ;
3739
3740 err = get_security_info (h, SE_FILE_OBJECT, si,
3741 NULL, NULL, NULL, NULL, &psd);
3742 if (err != ERROR_SUCCESS)
3743 return NULL;
3744
3745 return psd;
3746}
3747
3748static PSECURITY_DESCRIPTOR
3749get_file_security_desc_by_name (const char *fname)
8aaaec6b
EZ		 3750{
3751 PSECURITY_DESCRIPTOR psd = NULL;
3752 DWORD sd_len, err;
3753 SECURITY_INFORMATION si = OWNER_SECURITY_INFORMATION
3754 | GROUP_SECURITY_INFORMATION /* | DACL_SECURITY_INFORMATION */ ;
3755
3756 if (!get_file_security (fname, si, psd, 0, &sd_len))
3757 {
3758 err = GetLastError ();
3759 if (err != ERROR_INSUFFICIENT_BUFFER)
3760 return NULL;
3761 }
3762
3763 psd = xmalloc (sd_len);
3764 if (!get_file_security (fname, si, psd, sd_len, &sd_len))
3765 {
3766 xfree (psd);
3767 return NULL;
3768 }
3769
3770 return psd;
3771}
3772
3773static DWORD
3774get_rid (PSID sid)
3775{
3776 unsigned n_subauthorities;
3777
3778 /* Use the last sub-authority value of the RID, the relative
3779 portion of the SID, as user/group ID. */
3780 n_subauthorities = *get_sid_sub_authority_count (sid);
3781 if (n_subauthorities < 1)
3782 return 0; /* the "World" RID */
3783 return *get_sid_sub_authority (sid, n_subauthorities - 1);
3784}
3785
f8b35b24
EZ		 3786/* Caching SID and account values for faster lokup. */
3787
3788#ifdef __GNUC__
3789# define FLEXIBLE_ARRAY_MEMBER
3790#else
3791# define FLEXIBLE_ARRAY_MEMBER 1
3792#endif
3793
3794struct w32_id {
22749e9a 3795 unsigned rid;
f8b35b24
EZ		 3796 struct w32_id *next;
3797 char name[GNLEN+1];
3798 unsigned char sid[FLEXIBLE_ARRAY_MEMBER];
3799};
3800
3801static struct w32_id *w32_idlist;
3802
3803static int
22749e9a 3804w32_cached_id (PSID sid, unsigned *id, char *name)
f8b35b24
EZ		 3805{
3806 struct w32_id *tail, *found;
3807
3808 for (found = NULL, tail = w32_idlist; tail; tail = tail->next)
3809 {
3810 if (equal_sid ((PSID)tail->sid, sid))
3811 {
3812 found = tail;
3813 break;
3814 }
3815 }
3816 if (found)
3817 {
3818 *id = found->rid;
3819 strcpy (name, found->name);
3820 return 1;
3821 }
3822 else
3823 return 0;
3824}
3825
3826static void
22749e9a 3827w32_add_to_cache (PSID sid, unsigned id, char *name)
f8b35b24
EZ		 3828{
3829 DWORD sid_len;
3830 struct w32_id *new_entry;
3831
3832 /* We don't want to leave behind stale cache from when Emacs was
3833 dumped. */
3834 if (initialized)
3835 {
3836 sid_len = get_length_sid (sid);
3837 new_entry = xmalloc (offsetof (struct w32_id, sid) + sid_len);
3838 if (new_entry)
3839 {
3840 new_entry->rid = id;
3841 strcpy (new_entry->name, name);
3842 copy_sid (sid_len, (PSID)new_entry->sid, sid);
3843 new_entry->next = w32_idlist;
3844 w32_idlist = new_entry;
3845 }
3846 }
3847}
3848
8aaaec6b
EZ		 3849#define UID 1
3850#define GID 2
3851
3852static int
92340ec7 3853get_name_and_id (PSECURITY_DESCRIPTOR psd, unsigned *id, char *nm, int what)
8aaaec6b
EZ		 3854{
3855 PSID sid = NULL;
8aaaec6b
EZ		 3856 BOOL dflt;
3857 SID_NAME_USE ignore;
3858 char name[UNLEN+1];
3859 DWORD name_len = sizeof (name);
3860 char domain[1024];
ed3751c8 3861 DWORD domain_len = sizeof (domain);
8aaaec6b
EZ		 3862 int use_dflt = 0;
3863 int result;
3864
3865 if (what == UID)
3866 result = get_security_descriptor_owner (psd, &sid, &dflt);
3867 else if (what == GID)
3868 result = get_security_descriptor_group (psd, &sid, &dflt);
3869 else
3870 result = 0;
3871
3872 if (!result || !is_valid_sid (sid))
3873 use_dflt = 1;
f8b35b24 3874 else if (!w32_cached_id (sid, id, nm))
8aaaec6b 3875 {
92340ec7 3876 if (!lookup_account_sid (NULL, sid, name, &name_len,
8aaaec6b
EZ		 3877 domain, &domain_len, &ignore)
3878 || name_len > UNLEN+1)
3879 use_dflt = 1;
3880 else
3881 {
3882 *id = get_rid (sid);
3883 strcpy (nm, name);
f8b35b24 3884 w32_add_to_cache (sid, *id, name);
8aaaec6b
EZ		 3885 }
3886 }
3887 return use_dflt;
3888}
3889
3890static void
92340ec7 3891get_file_owner_and_group (PSECURITY_DESCRIPTOR psd, struct stat *st)
8aaaec6b
EZ		 3892{
3893 int dflt_usr = 0, dflt_grp = 0;
3894
3895 if (!psd)
3896 {
3897 dflt_usr = 1;
3898 dflt_grp = 1;
3899 }
3900 else
3901 {
92340ec7 3902 if (get_name_and_id (psd, &st->st_uid, st->st_uname, UID))
8aaaec6b 3903 dflt_usr = 1;
92340ec7 3904 if (get_name_and_id (psd, &st->st_gid, st->st_gname, GID))
8aaaec6b
EZ		 3905 dflt_grp = 1;
3906 }
3907 /* Consider files to belong to current user/group, if we cannot get
3908 more accurate information. */
3909 if (dflt_usr)
3910 {
3911 st->st_uid = dflt_passwd.pw_uid;
3912 strcpy (st->st_uname, dflt_passwd.pw_name);
3913 }
3914 if (dflt_grp)
3915 {
3916 st->st_gid = dflt_passwd.pw_gid;
3917 strcpy (st->st_gname, dflt_group.gr_name);
3918 }
3919}
3920
be4c6380
EZ		 3921/* Return non-zero if NAME is a potentially slow filesystem. */
3922int
3923is_slow_fs (const char *name)
3924{
3925 char drive_root[4];
3926 UINT devtype;
3927
3928 if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1]))
3929 devtype = DRIVE_REMOTE; /* assume UNC name is remote */
3930 else if (!(strlen (name) >= 2 && IS_DEVICE_SEP (name[1])))
3931 devtype = GetDriveType (NULL); /* use root of current drive */
3932 else
3933 {
3934 /* GetDriveType needs the root directory of the drive. */
3935 strncpy (drive_root, name, 2);
3936 drive_root[2] = '\\';
3937 drive_root[3] = '\0';
3938 devtype = GetDriveType (drive_root);
3939 }
3940 return !(devtype == DRIVE_FIXED || devtype == DRIVE_RAMDISK);
3941}
3942
5c207910
EZ		 3943/* If this is non-zero, the caller wants accurate information about
3944 file's owner and group, which could be expensive to get. */
3945int w32_stat_get_owner_group;
3946
480b0c5b
GV		 3947/* MSVC stat function can't cope with UNC names and has other bugs, so
3948 replace it with our own. This also allows us to calculate consistent
6dad7178
EZ		 3949 inode values and owner/group without hacks in the main Emacs code. */
3950
3951static int
3952stat_worker (const char * path, struct stat * buf, int follow_symlinks)
480b0c5b 3953{
6dad7178 3954 char *name, *save_name, *r;
480b0c5b
GV		 3955 WIN32_FIND_DATA wfd;
3956 HANDLE fh;
6dad7178 3957 unsigned __int64 fake_inode = 0;
480b0c5b
GV		 3958 int permission;
3959 int len;
3960 int rootdir = FALSE;
8aaaec6b 3961 PSECURITY_DESCRIPTOR psd = NULL;
6dad7178
EZ		 3962 int is_a_symlink = 0;
3963 DWORD file_flags = FILE_FLAG_BACKUP_SEMANTICS;
3964 DWORD access_rights = 0;
3965 DWORD fattrs = 0, serialnum = 0, fs_high = 0, fs_low = 0, nlinks = 1;
3966 FILETIME ctime, atime, wtime;
806fed21 3967 int dbcs_p;
480b0c5b
GV		 3968
3969 if (path == NULL || buf == NULL)
3970 {
3971 errno = EFAULT;
3972 return -1;
3973 }
3974
6dad7178 3975 save_name = name = (char *) map_w32_filename (path, &path);
22189f79
EZ		 3976 /* Must be valid filename, no wild cards or other invalid
3977 characters. We use _mbspbrk to support multibyte strings that
3978 might look to strpbrk as if they included literal *, ?, and other
3979 characters mentioned below that are disallowed by Windows
3980 filesystems. */
3981 if (_mbspbrk (name, "*?|<>\""))
480b0c5b
GV		 3982 {
3983 errno = ENOENT;
3984 return -1;
3985 }
3986
3987 /* Remove trailing directory separator, unless name is the root
3988 directory of a drive or UNC volume in which case ensure there
3989 is a trailing separator. */
3990 len = strlen (name);
480b0c5b
GV		 3991 name = strcpy (alloca (len + 2), name);
3992
6dad7178
EZ		 3993 /* Avoid a somewhat costly call to is_symlink if the filesystem
3994 doesn't support symlinks. */
3995 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
3996 is_a_symlink = is_symlink (name);
3997
3998 /* Plan A: Open the file and get all the necessary information via
3999 the resulting handle. This solves several issues in one blow:
4000
4001 . retrieves attributes for the target of a symlink, if needed
4002 . gets attributes of root directories and symlinks pointing to
4003 root directories, thus avoiding the need for special-casing
4004 these and detecting them by examining the file-name format
4005 . retrieves more accurate attributes (e.g., non-zero size for
4006 some directories, esp. directories that are junction points)
4007 . correctly resolves "c:/..", "/.." and similar file names
4008 . avoids run-time penalties for 99% of use cases
4009
4010 Plan A is always tried first, unless the user asked not to (but
4011 if the file is a symlink and we need to follow links, we try Plan
4012 A even if the user asked not to).
4013
4014 If Plan A fails, we go to Plan B (below), where various
4015 potentially expensive techniques must be used to handle "special"
4016 files such as UNC volumes etc. */
8aaaec6b 4017 if (!(NILP (Vw32_get_true_file_attributes)
19ced600 4018 || (EQ (Vw32_get_true_file_attributes, Qlocal) && is_slow_fs (name)))
6dad7178
EZ		 4019 /* Following symlinks requires getting the info by handle. */
4020 || (is_a_symlink && follow_symlinks))
480b0c5b 4021 {
6dad7178
EZ		 4022 BY_HANDLE_FILE_INFORMATION info;
4023
4024 if (is_a_symlink && !follow_symlinks)
4025 file_flags |= FILE_FLAG_OPEN_REPARSE_POINT;
4026 /* READ_CONTROL access rights are required to get security info
4027 by handle. But if the OS doesn't support security in the
4028 first place, we don't need to try. */
4029 if (is_windows_9x () != TRUE)
4030 access_rights |= READ_CONTROL;
4031
4032 fh = CreateFile (name, access_rights, 0, NULL, OPEN_EXISTING,
4033 file_flags, NULL);
4034 /* If CreateFile fails with READ_CONTROL, try again with zero as
4035 access rights. */
4036 if (fh == INVALID_HANDLE_VALUE && access_rights)
4037 fh = CreateFile (name, 0, 0, NULL, OPEN_EXISTING,
4038 file_flags, NULL);
4039 if (fh == INVALID_HANDLE_VALUE)
4040 goto no_true_file_attributes;
4041
3ed8598c 4042 /* This is more accurate in terms of getting the correct number
aa5ee2a3 4043 of links, but is quite slow (it is noticeable when Emacs is
480b0c5b 4044 making a list of file name completions). */
480b0c5b
GV		 4045 if (GetFileInformationByHandle (fh, &info))
4046 {
6dad7178 4047 nlinks = info.nNumberOfLinks;
76b3903d
GV		 4048 /* Might as well use file index to fake inode values, but this
4049 is not guaranteed to be unique unless we keep a handle open
4050 all the time (even then there are situations where it is
4051 not unique). Reputedly, there are at most 48 bits of info
4052 (on NTFS, presumably less on FAT). */
e3b88685
EZ		 4053 fake_inode = info.nFileIndexHigh;
4054 fake_inode <<= 32;
4055 fake_inode += info.nFileIndexLow;
6dad7178
EZ		 4056 serialnum = info.dwVolumeSerialNumber;
4057 fs_high = info.nFileSizeHigh;
4058 fs_low = info.nFileSizeLow;
4059 ctime = info.ftCreationTime;
4060 atime = info.ftLastAccessTime;
4061 wtime = info.ftLastWriteTime;
4062 fattrs = info.dwFileAttributes;
480b0c5b
GV		 4063 }
4064 else
4065 {
6dad7178
EZ		 4066 /* We don't go to Plan B here, because it's not clear that
4067 it's a good idea. The only known use case where
4068 CreateFile succeeds, but GetFileInformationByHandle fails
4069 (with ERROR_INVALID_FUNCTION) is for character devices
4070 such as NUL, PRN, etc. For these, switching to Plan B is
4071 a net loss, because we lose the character device
4072 attribute returned by GetFileType below (FindFirstFile
4073 doesn't set that bit in the attributes), and the other
4074 fields don't make sense for character devices anyway.
4075 Emacs doesn't really care for non-file entities in the
4076 context of l?stat, so neither do we. */
4077
4078 /* w32err is assigned so one could put a breakpoint here and
4079 examine its value, when GetFileInformationByHandle
4080 fails. */
4081 DWORD w32err = GetLastError ();
4082
4083 switch (w32err)
4084 {
4085 case ERROR_FILE_NOT_FOUND: /* can this ever happen? */
4086 errno = ENOENT;
4087 return -1;
4088 }
01f31dfb
AI		 4089 }
4090
6dad7178
EZ		 4091 /* Test for a symlink before testing for a directory, since
4092 symlinks to directories have the directory bit set, but we
4093 don't want them to appear as directories. */
4094 if (is_a_symlink && !follow_symlinks)
4095 buf->st_mode = S_IFLNK;
4096 else if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
4097 buf->st_mode = S_IFDIR;
93e0f0da
JR		 4098 else
4099 {
6dad7178
EZ		 4100 DWORD ftype = GetFileType (fh);
4101
4102 switch (ftype)
93e0f0da
JR		 4103 {
4104 case FILE_TYPE_DISK:
e3b88685 4105 buf->st_mode = S_IFREG;
93e0f0da
JR		 4106 break;
4107 case FILE_TYPE_PIPE:
e3b88685 4108 buf->st_mode = S_IFIFO;
93e0f0da
JR		 4109 break;
4110 case FILE_TYPE_CHAR:
4111 case FILE_TYPE_UNKNOWN:
4112 default:
e3b88685 4113 buf->st_mode = S_IFCHR;
93e0f0da 4114 }
480b0c5b 4115 }
6dad7178
EZ		 4116 /* We produce the fallback owner and group data, based on the
4117 current user that runs Emacs, in the following cases:
4118
5c207910 4119 . caller didn't request owner and group info
6dad7178
EZ		 4120 . this is Windows 9X
4121 . getting security by handle failed, and we need to produce
4122 information for the target of a symlink (this is better
4123 than producing a potentially misleading info about the
4124 symlink itself)
4125
4126 If getting security by handle fails, and we don't need to
4127 resolve symlinks, we try getting security by name. */
5c207910 4128 if (!w32_stat_get_owner_group || is_windows_9x () == TRUE)
92340ec7 4129 get_file_owner_and_group (NULL, buf);
5c207910 4130 else
6dad7178 4131 {
5c207910
EZ		 4132 psd = get_file_security_desc_by_handle (fh);
4133 if (psd)
4134 {
a4b0cca1 4135 get_file_owner_and_group (psd, buf);
5c207910
EZ		 4136 LocalFree (psd);
4137 }
4138 else if (!(is_a_symlink && follow_symlinks))
4139 {
4140 psd = get_file_security_desc_by_name (name);
a4b0cca1 4141 get_file_owner_and_group (psd, buf);
5c207910
EZ		 4142 xfree (psd);
4143 }
4144 else
a4b0cca1 4145 get_file_owner_and_group (NULL, buf);
6dad7178 4146 }
01f31dfb 4147 CloseHandle (fh);
76b3903d
GV		 4148 }
4149 else
4150 {
6dad7178
EZ		 4151 no_true_file_attributes:
4152 /* Plan B: Either getting a handle on the file failed, or the
4153 caller explicitly asked us to not bother making this
4154 information more accurate.
4155
4156 Implementation note: In Plan B, we never bother to resolve
4157 symlinks, even if we got here because we tried Plan A and
4158 failed. That's because, even if the caller asked for extra
4159 precision by setting Vw32_get_true_file_attributes to t,
4160 resolving symlinks requires acquiring a file handle to the
4161 symlink, which we already know will fail. And if the user
4162 did not ask for extra precision, resolving symlinks will fly
4163 in the face of that request, since the user then wants the
4164 lightweight version of the code. */
806fed21 4165 dbcs_p = max_filename_mbslen () > 1;
6dad7178
EZ		 4166 rootdir = (path >= save_name + len - 1
4167 && (IS_DIRECTORY_SEP (*path) || *path == 0));
4168
4169 /* If name is "c:/.." or "/.." then stat "c:/" or "/". */
4170 r = IS_DEVICE_SEP (name[1]) ? &name[2] : name;
4171 if (IS_DIRECTORY_SEP (r[0])
4172 && r[1] == '.' && r[2] == '.' && r[3] == '\0')
4173 r[1] = r[2] = '\0';
4174
4175 /* Note: If NAME is a symlink to the root of a UNC volume
4176 (i.e. "\\SERVER"), we will not detect that here, and we will
4177 return data about the symlink as result of FindFirst below.
4178 This is unfortunate, but that marginal use case does not
4179 justify a call to chase_symlinks which would impose a penalty
4180 on all the other use cases. (We get here for symlinks to
4181 roots of UNC volumes because CreateFile above fails for them,
4182 unlike with symlinks to root directories X:\ of drives.) */
4183 if (is_unc_volume (name))
4184 {
4185 fattrs = unc_volume_file_attributes (name);
4186 if (fattrs == -1)
4187 return -1;
4188
4189 ctime = atime = wtime = utc_base_ft;
4190 }
4191 else if (rootdir)
4192 {
806fed21
EZ		 4193 if (!dbcs_p)
4194 {
4195 if (!IS_DIRECTORY_SEP (name[len-1]))
4196 strcat (name, "\\");
4197 }
4198 else
4199 {
4200 char *end = name + len;
4201 char *n = CharPrevExA (file_name_codepage, name, end, 0);
4202
4203 if (!IS_DIRECTORY_SEP (*n))
4204 strcat (name, "\\");
4205 }
6dad7178
EZ		 4206 if (GetDriveType (name) < 2)
4207 {
4208 errno = ENOENT;
4209 return -1;
4210 }
4211
4212 fattrs = FILE_ATTRIBUTE_DIRECTORY;
4213 ctime = atime = wtime = utc_base_ft;
4214 }
4215 else
4216 {
806fed21
EZ		 4217 if (!dbcs_p)
4218 {
4219 if (IS_DIRECTORY_SEP (name[len-1]))
4220 name[len - 1] = 0;
4221 }
4222 else
4223 {
4224 char *end = name + len;
4225 char *n = CharPrevExA (file_name_codepage, name, end, 0);
4226
4227 if (IS_DIRECTORY_SEP (*n))
4228 *n = 0;
4229 }
6dad7178
EZ		 4230
4231 /* (This is hacky, but helps when doing file completions on
4232 network drives.) Optimize by using information available from
4233 active readdir if possible. */
4234 len = strlen (dir_pathname);
806fed21
EZ		 4235 if (!dbcs_p)
4236 {
4237 if (IS_DIRECTORY_SEP (dir_pathname[len-1]))
4238 len--;
4239 }
4240 else
4241 {
4242 char *end = dir_pathname + len;
4243 char *n = CharPrevExA (file_name_codepage, dir_pathname, end, 0);
4244
4245 if (IS_DIRECTORY_SEP (*n))
4246 len--;
4247 }
6dad7178
EZ		 4248 if (dir_find_handle != INVALID_HANDLE_VALUE
4249 && !(is_a_symlink && follow_symlinks)
4250 && strnicmp (save_name, dir_pathname, len) == 0
4251 && IS_DIRECTORY_SEP (name[len])
4252 && xstrcasecmp (name + len + 1, dir_static.d_name) == 0)
4253 {
4254 /* This was the last entry returned by readdir. */
4255 wfd = dir_find_data;
4256 }
4257 else
4258 {
4259 logon_network_drive (name);
4260
4261 fh = FindFirstFile (name, &wfd);
4262 if (fh == INVALID_HANDLE_VALUE)
4263 {
4264 errno = ENOENT;
4265 return -1;
4266 }
4267 FindClose (fh);
4268 }
4269 /* Note: if NAME is a symlink, the information we get from
4270 FindFirstFile is for the symlink, not its target. */
4271 fattrs = wfd.dwFileAttributes;
4272 ctime = wfd.ftCreationTime;
4273 atime = wfd.ftLastAccessTime;
4274 wtime = wfd.ftLastWriteTime;
4275 fs_high = wfd.nFileSizeHigh;
4276 fs_low = wfd.nFileSizeLow;
4277 fake_inode = 0;
4278 nlinks = 1;
4279 serialnum = volume_info.serialnum;
4280 }
4281 if (is_a_symlink && !follow_symlinks)
4282 buf->st_mode = S_IFLNK;
4283 else if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
4284 buf->st_mode = S_IFDIR;
4285 else
4286 buf->st_mode = S_IFREG;
8aaaec6b 4287
92340ec7 4288 get_file_owner_and_group (NULL, buf);
76b3903d
GV		 4289 }
4290
4291#if 0
4292 /* Not sure if there is any point in this. */
4293 if (!NILP (Vw32_generate_fake_inodes))
4294 fake_inode = generate_inode_val (name);
4295 else if (fake_inode == 0)
4296 {
4297 /* For want of something better, try to make everything unique. */
4298 static DWORD gen_num = 0;
4299 fake_inode = ++gen_num;
480b0c5b 4300 }
76b3903d
GV		 4301#endif
4302
6dad7178 4303 buf->st_ino = fake_inode;
480b0c5b 4304
6dad7178
EZ		 4305 buf->st_dev = serialnum;
4306 buf->st_rdev = serialnum;
480b0c5b 4307
6dad7178 4308 buf->st_size = fs_high;
8aaaec6b 4309 buf->st_size <<= 32;
6dad7178
EZ		 4310 buf->st_size += fs_low;
4311 buf->st_nlink = nlinks;
480b0c5b
GV		 4312
4313 /* Convert timestamps to Unix format. */
6dad7178
EZ		 4314 buf->st_mtime = convert_time (wtime);
4315 buf->st_atime = convert_time (atime);
480b0c5b 4316 if (buf->st_atime == 0) buf->st_atime = buf->st_mtime;
6dad7178 4317 buf->st_ctime = convert_time (ctime);
480b0c5b
GV		 4318 if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime;
4319
4320 /* determine rwx permissions */
6dad7178
EZ		 4321 if (is_a_symlink && !follow_symlinks)
4322 permission = S_IREAD | S_IWRITE | S_IEXEC; /* Posix expectations */
480b0c5b 4323 else
6dad7178
EZ		 4324 {
4325 if (fattrs & FILE_ATTRIBUTE_READONLY)
4326 permission = S_IREAD;
4327 else
4328 permission = S_IREAD | S_IWRITE;
177c0ea7 4329
6dad7178
EZ		 4330 if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
4331 permission |= S_IEXEC;
4332 else if (is_exec (name))
4333 permission |= S_IEXEC;
4334 }
480b0c5b
GV		 4335
4336 buf->st_mode |= permission | (permission >> 3) | (permission >> 6);
4337
4338 return 0;
4339}
4340
6dad7178
EZ		 4341int
4342stat (const char * path, struct stat * buf)
4343{
4344 return stat_worker (path, buf, 1);
4345}
4346
4347int
4348lstat (const char * path, struct stat * buf)
4349{
4350 return stat_worker (path, buf, 0);
4351}
4352
8654f9d7
PE		 4353int
4354fstatat (int fd, char const *name, struct stat *st, int flags)
4355{
4356 /* Rely on a hack: an open directory is modeled as file descriptor 0.
4357 This is good enough for the current usage in Emacs, but is fragile.
4358
d9c287e5 4359 FIXME: Add proper support for fdopendir, fstatat, readlinkat.
8654f9d7
PE		 4360 Gnulib does this and can serve as a model. */
4361 char fullname[MAX_PATH];
4362
4363 if (fd != AT_FDCWD)
4364 {
4365 if (_snprintf (fullname, sizeof fullname, "%s/%s", dir_pathname, name)
4366 < 0)
4367 {
4368 errno = ENAMETOOLONG;
4369 return -1;
4370 }
4371 name = fullname;
4372 }
4373
4374 return stat_worker (name, st, ! (flags & AT_SYMLINK_NOFOLLOW));
4375}
4376
16bb7578
GV		 4377/* Provide fstat and utime as well as stat for consistent handling of
4378 file timestamps. */
4379int
4380fstat (int desc, struct stat * buf)
4381{
4382 HANDLE fh = (HANDLE) _get_osfhandle (desc);
4383 BY_HANDLE_FILE_INFORMATION info;
e3b88685 4384 unsigned __int64 fake_inode;
16bb7578
GV		 4385 int permission;
4386
4387 switch (GetFileType (fh) & ~FILE_TYPE_REMOTE)
4388 {
4389 case FILE_TYPE_DISK:
e3b88685 4390 buf->st_mode = S_IFREG;
16bb7578
GV		 4391 if (!GetFileInformationByHandle (fh, &info))
4392 {
4393 errno = EACCES;
4394 return -1;
4395 }
4396 break;
4397 case FILE_TYPE_PIPE:
e3b88685 4398 buf->st_mode = S_IFIFO;
16bb7578
GV		 4399 goto non_disk;
4400 case FILE_TYPE_CHAR:
4401 case FILE_TYPE_UNKNOWN:
4402 default:
e3b88685 4403 buf->st_mode = S_IFCHR;
16bb7578
GV		 4404 non_disk:
4405 memset (&info, 0, sizeof (info));
4406 info.dwFileAttributes = 0;
4407 info.ftCreationTime = utc_base_ft;
4408 info.ftLastAccessTime = utc_base_ft;
4409 info.ftLastWriteTime = utc_base_ft;
4410 }
4411
4412 if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
e3b88685 4413 buf->st_mode = S_IFDIR;
93e0f0da
JR		 4414
4415 buf->st_nlink = info.nNumberOfLinks;
4416 /* Might as well use file index to fake inode values, but this
4417 is not guaranteed to be unique unless we keep a handle open
4418 all the time (even then there are situations where it is
4419 not unique). Reputedly, there are at most 48 bits of info
4420 (on NTFS, presumably less on FAT). */
e3b88685
EZ		 4421 fake_inode = info.nFileIndexHigh;
4422 fake_inode <<= 32;
4423 fake_inode += info.nFileIndexLow;
16bb7578
GV		 4424
4425 /* MSVC defines _ino_t to be short; other libc's might not. */
4426 if (sizeof (buf->st_ino) == 2)
4427 buf->st_ino = fake_inode ^ (fake_inode >> 16);
4428 else
4429 buf->st_ino = fake_inode;
4430
76e9f7b9
EZ		 4431 /* If the caller so requested, get the true file owner and group.
4432 Otherwise, consider the file to belong to the current user. */
4433 if (!w32_stat_get_owner_group || is_windows_9x () == TRUE)
4434 get_file_owner_and_group (NULL, buf);
4435 else
4436 {
4437 PSECURITY_DESCRIPTOR psd = NULL;
4438
4439 psd = get_file_security_desc_by_handle (fh);
4440 if (psd)
4441 {
4442 get_file_owner_and_group (psd, buf);
4443 LocalFree (psd);
4444 }
4445 else
4446 get_file_owner_and_group (NULL, buf);
4447 }
16bb7578
GV		 4448
4449 buf->st_dev = info.dwVolumeSerialNumber;
4450 buf->st_rdev = info.dwVolumeSerialNumber;
4451
8aaaec6b
EZ		 4452 buf->st_size = info.nFileSizeHigh;
4453 buf->st_size <<= 32;
4454 buf->st_size += info.nFileSizeLow;
16bb7578
GV		 4455
4456 /* Convert timestamps to Unix format. */
4457 buf->st_mtime = convert_time (info.ftLastWriteTime);
4458 buf->st_atime = convert_time (info.ftLastAccessTime);
4459 if (buf->st_atime == 0) buf->st_atime = buf->st_mtime;
4460 buf->st_ctime = convert_time (info.ftCreationTime);
4461 if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime;
4462
4463 /* determine rwx permissions */
4464 if (info.dwFileAttributes & FILE_ATTRIBUTE_READONLY)
e3b88685 4465 permission = S_IREAD;
16bb7578 4466 else
e3b88685 4467 permission = S_IREAD | S_IWRITE;
177c0ea7 4468
16bb7578 4469 if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
e3b88685 4470 permission |= S_IEXEC;
16bb7578
GV		 4471 else
4472 {
4473#if 0 /* no way of knowing the filename */
4474 char * p = strrchr (name, '.');
4475 if (p != NULL &&
05131107
JR		 4476 (xstrcasecmp (p, ".exe") == 0 ||
4477 xstrcasecmp (p, ".com") == 0 ||
4478 xstrcasecmp (p, ".bat") == 0 ||
4479 xstrcasecmp (p, ".cmd") == 0))
e3b88685 4480 permission |= S_IEXEC;
16bb7578
GV		 4481#endif
4482 }
4483
4484 buf->st_mode |= permission | (permission >> 3) | (permission >> 6);
4485
4486 return 0;
4487}
4488
4489int
86e93460 4490utime (const char *name, struct utimbuf *times)
16bb7578 4491{
86e93460 4492 struct utimbuf deftime;
16bb7578
GV		 4493 HANDLE fh;
4494 FILETIME mtime;
4495 FILETIME atime;
4496
4497 if (times == NULL)
4498 {
4499 deftime.modtime = deftime.actime = time (NULL);
4500 times = &deftime;
4501 }
4502
4503 /* Need write access to set times. */
0d9f584b 4504 fh = CreateFile (name, FILE_WRITE_ATTRIBUTES,
0ace05d3
EZ		 4505 /* If NAME specifies a directory, FILE_SHARE_DELETE
4506 allows other processes to delete files inside it,
4507 while we have the directory open. */
0d9f584b
EZ		 4508 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
4509 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
7604f298 4510 if (fh != INVALID_HANDLE_VALUE)
16bb7578
GV		 4511 {
4512 convert_from_time_t (times->actime, &atime);
4513 convert_from_time_t (times->modtime, &mtime);
4514 if (!SetFileTime (fh, NULL, &atime, &mtime))
4515 {
4516 CloseHandle (fh);
4517 errno = EACCES;
4518 return -1;
4519 }
4520 CloseHandle (fh);
4521 }
4522 else
4523 {
4524 errno = EINVAL;
4525 return -1;
4526 }
4527 return 0;
4528}
4529
7c80d5ec 4530\f
6dad7178
EZ		 4531/* Symlink-related functions. */
4532#ifndef SYMBOLIC_LINK_FLAG_DIRECTORY
4533#define SYMBOLIC_LINK_FLAG_DIRECTORY 0x1
4534#endif
4535
0f7bb05d 4536int
6dad7178 4537symlink (char const *filename, char const *linkname)
0f7bb05d 4538{
6dad7178
EZ		 4539 char linkfn[MAX_PATH], *tgtfn;
4540 DWORD flags = 0;
4541 int dir_access, filename_ends_in_slash;
806fed21 4542 int dbcs_p;
6dad7178
EZ		 4543
4544 /* Diagnostics follows Posix as much as possible. */
4545 if (filename == NULL || linkname == NULL)
4546 {
4547 errno = EFAULT;
4548 return -1;
4549 }
4550 if (!*filename)
4551 {
4552 errno = ENOENT;
4553 return -1;
4554 }
4555 if (strlen (filename) > MAX_PATH || strlen (linkname) > MAX_PATH)
4556 {
4557 errno = ENAMETOOLONG;
4558 return -1;
4559 }
4560
4561 strcpy (linkfn, map_w32_filename (linkname, NULL));
4562 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) == 0)
4563 {
4564 errno = EPERM;
4565 return -1;
4566 }
4567
806fed21
EZ		 4568 dbcs_p = max_filename_mbslen () > 1;
4569
6dad7178
EZ		 4570 /* Note: since empty FILENAME was already rejected, we can safely
4571 refer to FILENAME[1]. */
4572 if (!(IS_DIRECTORY_SEP (filename[0]) || IS_DEVICE_SEP (filename[1])))
4573 {
4574 /* Non-absolute FILENAME is understood as being relative to
4575 LINKNAME's directory. We need to prepend that directory to
14f20728 4576 FILENAME to get correct results from faccessat below, since
6dad7178
EZ		 4577 otherwise it will interpret FILENAME relative to the
4578 directory where the Emacs process runs. Note that
4579 make-symbolic-link always makes sure LINKNAME is a fully
4580 expanded file name. */
4581 char tem[MAX_PATH];
4582 char *p = linkfn + strlen (linkfn);
4583
806fed21
EZ		 4584 if (!dbcs_p)
4585 {
4586 while (p > linkfn && !IS_ANY_SEP (p[-1]))
4587 p--;
4588 }
4589 else
4590 {
4591 char *p1 = CharPrevExA (file_name_codepage, linkfn, p, 0);
4592
4593 while (p > linkfn && !IS_ANY_SEP (*p1))
4594 {
4595 p = p1;
4596 p1 = CharPrevExA (file_name_codepage, linkfn, p1, 0);
4597 }
4598 }
6dad7178
EZ		 4599 if (p > linkfn)
4600 strncpy (tem, linkfn, p - linkfn);
4601 tem[p - linkfn] = '\0';
4602 strcat (tem, filename);
14f20728 4603 dir_access = faccessat (AT_FDCWD, tem, D_OK, AT_EACCESS);
6dad7178
EZ		 4604 }
4605 else
14f20728 4606 dir_access = faccessat (AT_FDCWD, filename, D_OK, AT_EACCESS);
6dad7178
EZ		 4607
4608 /* Since Windows distinguishes between symlinks to directories and
8b2e00a3 4609 to files, we provide a kludgy feature: if FILENAME doesn't
6dad7178
EZ		 4610 exist, but ends in a slash, we create a symlink to directory. If
4611 FILENAME exists and is a directory, we always create a symlink to
4612 directory. */
806fed21
EZ		 4613 if (!dbcs_p)
4614 filename_ends_in_slash = IS_DIRECTORY_SEP (filename[strlen (filename) - 1]);
4615 else
4616 {
4617 const char *end = filename + strlen (filename);
4618 const char *n = CharPrevExA (file_name_codepage, filename, end, 0);
4619
4620 filename_ends_in_slash = IS_DIRECTORY_SEP (*n);
4621 }
6dad7178
EZ		 4622 if (dir_access == 0 || filename_ends_in_slash)
4623 flags = SYMBOLIC_LINK_FLAG_DIRECTORY;
4624
4625 tgtfn = (char *)map_w32_filename (filename, NULL);
4626 if (filename_ends_in_slash)
4627 tgtfn[strlen (tgtfn) - 1] = '\0';
4628
4629 errno = 0;
4630 if (!create_symbolic_link (linkfn, tgtfn, flags))
4631 {
4632 /* ENOSYS is set by create_symbolic_link, when it detects that
4633 the OS doesn't support the CreateSymbolicLink API. */
4634 if (errno != ENOSYS)
4635 {
4636 DWORD w32err = GetLastError ();
4637
4638 switch (w32err)
4639 {
4640 /* ERROR_SUCCESS is sometimes returned when LINKFN and
4641 TGTFN point to the same file name, go figure. */
4642 case ERROR_SUCCESS:
4643 case ERROR_FILE_EXISTS:
4644 errno = EEXIST;
4645 break;
4646 case ERROR_ACCESS_DENIED:
4647 errno = EACCES;
4648 break;
4649 case ERROR_FILE_NOT_FOUND:
4650 case ERROR_PATH_NOT_FOUND:
4651 case ERROR_BAD_NETPATH:
4652 case ERROR_INVALID_REPARSE_DATA:
4653 errno = ENOENT;
4654 break;
4655 case ERROR_DIRECTORY:
4656 errno = EISDIR;
4657 break;
4658 case ERROR_PRIVILEGE_NOT_HELD:
4659 case ERROR_NOT_ALL_ASSIGNED:
4660 errno = EPERM;
4661 break;
4662 case ERROR_DISK_FULL:
4663 errno = ENOSPC;
4664 break;
4665 default:
4666 errno = EINVAL;
4667 break;
4668 }
4669 }
4670 return -1;
4671 }
4672 return 0;
0f7bb05d
EZ		 4673}
4674
6dad7178
EZ		 4675/* A quick inexpensive test of whether FILENAME identifies a file that
4676 is a symlink. Returns non-zero if it is, zero otherwise. FILENAME
4677 must already be in the normalized form returned by
4678 map_w32_filename.
4679
4680 Note: for repeated operations on many files, it is best to test
4681 whether the underlying volume actually supports symlinks, by
4682 testing the FILE_SUPPORTS_REPARSE_POINTS bit in volume's flags, and
4683 avoid the call to this function if it doesn't. That's because the
8b2e00a3 4684 call to GetFileAttributes takes a non-negligible time, especially
6dad7178
EZ		 4685 on non-local or removable filesystems. See stat_worker for an
4686 example of how to do that. */
4687static int
4688is_symlink (const char *filename)
4689{
4690 DWORD attrs;
4691 WIN32_FIND_DATA wfd;
4692 HANDLE fh;
4693
4694 attrs = GetFileAttributes (filename);
4695 if (attrs == -1)
4696 {
4697 DWORD w32err = GetLastError ();
4698
4699 switch (w32err)
4700 {
4701 case ERROR_BAD_NETPATH: /* network share, can't be a symlink */
4702 break;
4703 case ERROR_ACCESS_DENIED:
4704 errno = EACCES;
4705 break;
4706 case ERROR_FILE_NOT_FOUND:
4707 case ERROR_PATH_NOT_FOUND:
4708 default:
4709 errno = ENOENT;
4710 break;
4711 }
4712 return 0;
4713 }
4714 if ((attrs & FILE_ATTRIBUTE_REPARSE_POINT) == 0)
4715 return 0;
4716 logon_network_drive (filename);
4717 fh = FindFirstFile (filename, &wfd);
4718 if (fh == INVALID_HANDLE_VALUE)
4719 return 0;
4720 FindClose (fh);
4721 return (wfd.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) != 0
4722 && (wfd.dwReserved0 & IO_REPARSE_TAG_SYMLINK) == IO_REPARSE_TAG_SYMLINK;
4723}
4724
4725/* If NAME identifies a symbolic link, copy into BUF the file name of
4726 the symlink's target. Copy at most BUF_SIZE bytes, and do NOT
4727 null-terminate the target name, even if it fits. Return the number
4728 of bytes copied, or -1 if NAME is not a symlink or any error was
4729 encountered while resolving it. The file name copied into BUF is
4730 encoded in the current ANSI codepage. */
0f7bb05d 4731ssize_t
6dad7178 4732readlink (const char *name, char *buf, size_t buf_size)
0f7bb05d 4733{
6dad7178
EZ		 4734 const char *path;
4735 TOKEN_PRIVILEGES privs;
4736 int restore_privs = 0;
4737 HANDLE sh;
4738 ssize_t retval;
4739
4740 if (name == NULL)
4741 {
4742 errno = EFAULT;
4743 return -1;
4744 }
4745 if (!*name)
4746 {
4747 errno = ENOENT;
4748 return -1;
4749 }
4750
4751 path = map_w32_filename (name, NULL);
4752
4753 if (strlen (path) > MAX_PATH)
4754 {
4755 errno = ENAMETOOLONG;
4756 return -1;
4757 }
4758
4759 errno = 0;
4760 if (is_windows_9x () == TRUE
4761 || (volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) == 0
4762 || !is_symlink (path))
4763 {
4764 if (!errno)
4765 errno = EINVAL; /* not a symlink */
4766 return -1;
4767 }
4768
4769 /* Done with simple tests, now we're in for some _real_ work. */
4770 if (enable_privilege (SE_BACKUP_NAME, TRUE, &privs))
4771 restore_privs = 1;
4772 /* Implementation note: From here and onward, don't return early,
4773 since that will fail to restore the original set of privileges of
4774 the calling thread. */
4775
4776 retval = -1; /* not too optimistic, are we? */
4777
4778 /* Note: In the next call to CreateFile, we use zero as the 2nd
4779 argument because, when the symlink is a hidden/system file,
4780 e.g. 'C:\Users\All Users', GENERIC_READ fails with
4781 ERROR_ACCESS_DENIED. Zero seems to work just fine, both for file
4782 and directory symlinks. */
4783 sh = CreateFile (path, 0, 0, NULL, OPEN_EXISTING,
4784 FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS,
4785 NULL);
4786 if (sh != INVALID_HANDLE_VALUE)
4787 {
4788 BYTE reparse_buf[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
4789 REPARSE_DATA_BUFFER *reparse_data = (REPARSE_DATA_BUFFER *)&reparse_buf[0];
4790 DWORD retbytes;
4791
4792 if (!DeviceIoControl (sh, FSCTL_GET_REPARSE_POINT, NULL, 0,
4793 reparse_buf, MAXIMUM_REPARSE_DATA_BUFFER_SIZE,
4794 &retbytes, NULL))
4795 errno = EIO;
4796 else if (reparse_data->ReparseTag != IO_REPARSE_TAG_SYMLINK)
4797 errno = EINVAL;
4798 else
4799 {
474d441e 4800 /* Copy the link target name, in wide characters, from
6dad7178
EZ		 4801 reparse_data, then convert it to multibyte encoding in
4802 the current locale's codepage. */
4803 WCHAR *lwname;
4804 BYTE lname[MAX_PATH];
4805 USHORT lname_len;
4806 USHORT lwname_len =
4807 reparse_data->SymbolicLinkReparseBuffer.PrintNameLength;
4808 WCHAR *lwname_src =
4809 reparse_data->SymbolicLinkReparseBuffer.PathBuffer
4810 + reparse_data->SymbolicLinkReparseBuffer.PrintNameOffset/sizeof(WCHAR);
26854e9c
EZ		 4811 /* This updates file_name_codepage which we need below. */
4812 int dbcs_p = max_filename_mbslen () > 1;
6dad7178
EZ		 4813
4814 /* According to MSDN, PrintNameLength does not include the
4815 terminating null character. */
4816 lwname = alloca ((lwname_len + 1) * sizeof(WCHAR));
4817 memcpy (lwname, lwname_src, lwname_len);
4818 lwname[lwname_len/sizeof(WCHAR)] = 0; /* null-terminate */
4819
26854e9c 4820 lname_len = WideCharToMultiByte (file_name_codepage, 0, lwname, -1,
6dad7178
EZ		 4821 lname, MAX_PATH, NULL, NULL);
4822 if (!lname_len)
4823 {
4824 /* WideCharToMultiByte failed. */
4825 DWORD w32err1 = GetLastError ();
4826
4827 switch (w32err1)
4828 {
4829 case ERROR_INSUFFICIENT_BUFFER:
4830 errno = ENAMETOOLONG;
4831 break;
4832 case ERROR_INVALID_PARAMETER:
4833 errno = EFAULT;
4834 break;
4835 case ERROR_NO_UNICODE_TRANSLATION:
4836 errno = ENOENT;
4837 break;
4838 default:
4839 errno = EINVAL;
4840 break;
4841 }
4842 }
4843 else
4844 {
4845 size_t size_to_copy = buf_size;
6ee4509a 4846 BYTE *p = lname, *p2;
6dad7178
EZ		 4847 BYTE *pend = p + lname_len;
4848
4849 /* Normalize like dostounix_filename does, but we don't
4850 want to assume that lname is null-terminated. */
6ee4509a 4851 if (dbcs_p)
26854e9c 4852 p2 = CharNextExA (file_name_codepage, p, 0);
6ee4509a
EZ		 4853 else
4854 p2 = p + 1;
4855 if (*p && *p2 == ':' && *p >= 'A' && *p <= 'Z')
4856 {
4857 *p += 'a' - 'A';
4858 p += 2;
4859 }
6dad7178
EZ		 4860 while (p <= pend)
4861 {
4862 if (*p == '\\')
4863 *p = '/';
6ee4509a
EZ		 4864 if (dbcs_p)
4865 {
26854e9c 4866 p = CharNextExA (file_name_codepage, p, 0);
6ee4509a
EZ		 4867 /* CharNextExA doesn't advance at null character. */
4868 if (!*p)
4869 break;
4870 }
4871 else
4872 ++p;
6dad7178
EZ		 4873 }
4874 /* Testing for null-terminated LNAME is paranoia:
4875 WideCharToMultiByte should always return a
4876 null-terminated string when its 4th argument is -1
4877 and its 3rd argument is null-terminated (which they
4878 are, see above). */
4879 if (lname[lname_len - 1] == '\0')
4880 lname_len--;
4881 if (lname_len <= buf_size)
4882 size_to_copy = lname_len;
4883 strncpy (buf, lname, size_to_copy);
4884 /* Success! */
4885 retval = size_to_copy;
4886 }
4887 }
4888 CloseHandle (sh);
4889 }
4890 else
4891 {
4892 /* CreateFile failed. */
4893 DWORD w32err2 = GetLastError ();
4894
4895 switch (w32err2)
4896 {
4897 case ERROR_FILE_NOT_FOUND:
4898 case ERROR_PATH_NOT_FOUND:
4899 errno = ENOENT;
4900 break;
4901 case ERROR_ACCESS_DENIED:
4902 case ERROR_TOO_MANY_OPEN_FILES:
4903 errno = EACCES;
4904 break;
4905 default:
4906 errno = EPERM;
4907 break;
4908 }
4909 }
4910 if (restore_privs)
4911 {
4912 restore_privilege (&privs);
4913 revert_to_self ();
4914 }
4915
4916 return retval;
0f7bb05d
EZ		 4917}
4918
8654f9d7
PE		 4919ssize_t
4920readlinkat (int fd, char const *name, char *buffer,
4921 size_t buffer_size)
4922{
4923 /* Rely on a hack: an open directory is modeled as file descriptor 0,
4924 as in fstatat. FIXME: Add proper support for readlinkat. */
4925 char fullname[MAX_PATH];
4926
4927 if (fd != AT_FDCWD)
4928 {
4929 if (_snprintf (fullname, sizeof fullname, "%s/%s", dir_pathname, name)
4930 < 0)
4931 {
4932 errno = ENAMETOOLONG;
4933 return -1;
4934 }
4935 name = fullname;
4936 }
4937
4938 return readlink (name, buffer, buffer_size);
4939}
4940
6dad7178
EZ		 4941/* If FILE is a symlink, return its target (stored in a static
4942 buffer); otherwise return FILE.
4943
4944 This function repeatedly resolves symlinks in the last component of
4945 a chain of symlink file names, as in foo -> bar -> baz -> ...,
4946 until it arrives at a file whose last component is not a symlink,
4947 or some error occurs. It returns the target of the last
4948 successfully resolved symlink in the chain. If it succeeds to
4949 resolve even a single symlink, the value returned is an absolute
4950 file name with backslashes (result of GetFullPathName). By
4951 contrast, if the original FILE is returned, it is unaltered.
4952
4953 Note: This function can set errno even if it succeeds.
4954
4955 Implementation note: we only resolve the last portion ("basename")
4956 of the argument FILE and of each following file in the chain,
4957 disregarding any possible symlinks in its leading directories.
4958 This is because Windows system calls and library functions
4959 transparently resolve symlinks in leading directories and return
4960 correct information, as long as the basename is not a symlink. */
4961static char *
4962chase_symlinks (const char *file)
4963{
4964 static char target[MAX_PATH];
4965 char link[MAX_PATH];
4966 ssize_t res, link_len;
4967 int loop_count = 0;
806fed21 4968 int dbcs_p;
6dad7178
EZ		 4969
4970 if (is_windows_9x () == TRUE || !is_symlink (file))
4971 return (char *)file;
4972
4973 if ((link_len = GetFullPathName (file, MAX_PATH, link, NULL)) == 0)
4974 return (char *)file;
4975
806fed21 4976 dbcs_p = max_filename_mbslen () > 1;
6dad7178
EZ		 4977 target[0] = '\0';
4978 do {
4979
4980 /* Remove trailing slashes, as we want to resolve the last
4981 non-trivial part of the link name. */
806fed21
EZ		 4982 if (!dbcs_p)
4983 {
4984 while (link_len > 3 && IS_DIRECTORY_SEP (link[link_len-1]))
4985 link[link_len--] = '\0';
4986 }
4987 else if (link_len > 3)
4988 {
4989 char *n = CharPrevExA (file_name_codepage, link, link + link_len, 0);
4990
4991 while (n >= link + 2 && IS_DIRECTORY_SEP (*n))
4992 {
4993 n[1] = '\0';
4994 n = CharPrevExA (file_name_codepage, link, n, 0);
4995 }
4996 }
6dad7178
EZ		 4997
4998 res = readlink (link, target, MAX_PATH);
4999 if (res > 0)
5000 {
5001 target[res] = '\0';
5002 if (!(IS_DEVICE_SEP (target[1])
25a20a3a 5003 || (IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]))))
6dad7178
EZ		 5004 {
5005 /* Target is relative. Append it to the directory part of
5006 the symlink, then copy the result back to target. */
5007 char *p = link + link_len;
5008
806fed21
EZ		 5009 if (!dbcs_p)
5010 {
5011 while (p > link && !IS_ANY_SEP (p[-1]))
5012 p--;
5013 }
5014 else
5015 {
5016 char *p1 = CharPrevExA (file_name_codepage, link, p, 0);
5017
5018 while (p > link && !IS_ANY_SEP (*p1))
5019 {
5020 p = p1;
5021 p1 = CharPrevExA (file_name_codepage, link, p1, 0);
5022 }
5023 }
6dad7178
EZ		 5024 strcpy (p, target);
5025 strcpy (target, link);
5026 }
5027 /* Resolve any "." and ".." to get a fully-qualified file name
5028 in link[] again. */
5029 link_len = GetFullPathName (target, MAX_PATH, link, NULL);
5030 }
5031 } while (res > 0 && link_len > 0 && ++loop_count <= 100);
5032
5033 if (loop_count > 100)
5034 errno = ELOOP;
5035
5036 if (target[0] == '\0') /* not a single call to readlink succeeded */
5037 return (char *)file;
5038 return target;
5039}
5040
66447e07
EZ		 5041\f
5042/* Posix ACL emulation. */
5043
5044int
5045acl_valid (acl_t acl)
5046{
5047 return is_valid_security_descriptor ((PSECURITY_DESCRIPTOR)acl) ? 0 : -1;
5048}
5049
5050char *
5051acl_to_text (acl_t acl, ssize_t *size)
5052{
5053 LPTSTR str_acl;
5054 SECURITY_INFORMATION flags =
5055 OWNER_SECURITY_INFORMATION |
5056 GROUP_SECURITY_INFORMATION |
5057 DACL_SECURITY_INFORMATION;
5058 char *retval = NULL;
b764d018 5059 ULONG local_size;
66447e07
EZ		 5060 int e = errno;
5061
5062 errno = 0;
5063
5064 if (convert_sd_to_sddl ((PSECURITY_DESCRIPTOR)acl, SDDL_REVISION_1, flags, &str_acl, &local_size))
5065 {
5066 errno = e;
5067 /* We don't want to mix heaps, so we duplicate the string in our
5068 heap and free the one allocated by the API. */
5069 retval = xstrdup (str_acl);
5070 if (size)
5071 *size = local_size;
5072 LocalFree (str_acl);
5073 }
5074 else if (errno != ENOTSUP)
5075 errno = EINVAL;
5076
5077 return retval;
5078}
5079
5080acl_t
5081acl_from_text (const char *acl_str)
5082{
5083 PSECURITY_DESCRIPTOR psd, retval = NULL;
5084 ULONG sd_size;
5085 int e = errno;
5086
5087 errno = 0;
5088
5089 if (convert_sddl_to_sd (acl_str, SDDL_REVISION_1, &psd, &sd_size))
5090 {
5091 errno = e;
5092 retval = xmalloc (sd_size);
5093 memcpy (retval, psd, sd_size);
5094 LocalFree (psd);
5095 }
5096 else if (errno != ENOTSUP)
5097 errno = EINVAL;
5098
5099 return retval;
5100}
5101
5102int
5103acl_free (void *ptr)
5104{
5105 xfree (ptr);
5106 return 0;
5107}
5108
5109acl_t
5110acl_get_file (const char *fname, acl_type_t type)
5111{
5112 PSECURITY_DESCRIPTOR psd = NULL;
474d441e 5113 const char *filename;
66447e07
EZ		 5114
5115 if (type == ACL_TYPE_ACCESS)
5116 {
5117 DWORD sd_len, err;
5118 SECURITY_INFORMATION si =
5119 OWNER_SECURITY_INFORMATION |
5120 GROUP_SECURITY_INFORMATION |
5121 DACL_SECURITY_INFORMATION ;
5122 int e = errno;
5123
474d441e
EZ		 5124 filename = map_w32_filename (fname, NULL);
5125 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
5126 fname = chase_symlinks (filename);
5127 else
5128 fname = filename;
5129
66447e07
EZ		 5130 errno = 0;
5131 if (!get_file_security (fname, si, psd, 0, &sd_len)
5132 && errno != ENOTSUP)
5133 {
5134 err = GetLastError ();
5135 if (err == ERROR_INSUFFICIENT_BUFFER)
5136 {
5137 psd = xmalloc (sd_len);
5138 if (!get_file_security (fname, si, psd, sd_len, &sd_len))
5139 {
5140 xfree (psd);
5141 errno = EIO;
5142 psd = NULL;
5143 }
5144 }
5145 else if (err == ERROR_FILE_NOT_FOUND
5146 || err == ERROR_PATH_NOT_FOUND)
5147 errno = ENOENT;
5148 else
5149 errno = EIO;
5150 }
5151 else if (!errno)
5152 errno = e;
5153 }
5154 else if (type != ACL_TYPE_DEFAULT)
5155 errno = EINVAL;
5156
5157 return psd;
5158}
5159
5160int
5161acl_set_file (const char *fname, acl_type_t type, acl_t acl)
5162{
5163 TOKEN_PRIVILEGES old1, old2;
5164 DWORD err;
66447e07
EZ		 5165 int st = 0, retval = -1;
5166 SECURITY_INFORMATION flags = 0;
5167 PSID psid;
5168 PACL pacl;
5169 BOOL dflt;
5170 BOOL dacl_present;
5171 int e;
474d441e 5172 const char *filename;
66447e07
EZ		 5173
5174 if (acl_valid (acl) != 0
5175 || (type != ACL_TYPE_DEFAULT && type != ACL_TYPE_ACCESS))
5176 {
5177 errno = EINVAL;
5178 return -1;
5179 }
5180
5181 if (type == ACL_TYPE_DEFAULT)
5182 {
5183 errno = ENOSYS;
5184 return -1;
5185 }
5186
474d441e
EZ		 5187 filename = map_w32_filename (fname, NULL);
5188 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
5189 fname = chase_symlinks (filename);
5190 else
5191 fname = filename;
5192
66447e07
EZ		 5193 if (get_security_descriptor_owner ((PSECURITY_DESCRIPTOR)acl, &psid, &dflt)
5194 && psid)
5195 flags |= OWNER_SECURITY_INFORMATION;
5196 if (get_security_descriptor_group ((PSECURITY_DESCRIPTOR)acl, &psid, &dflt)
5197 && psid)
5198 flags |= GROUP_SECURITY_INFORMATION;
5199 if (get_security_descriptor_dacl ((PSECURITY_DESCRIPTOR)acl, &dacl_present,
5200 &pacl, &dflt)
5201 && dacl_present)
5202 flags |= DACL_SECURITY_INFORMATION;
5203 if (!flags)
5204 return 0;
5205
5206 /* According to KB-245153, setting the owner will succeed if either:
5207 (1) the caller is the user who will be the new owner, and has the
5208 SE_TAKE_OWNERSHIP privilege, or
5209 (2) the caller has the SE_RESTORE privilege, in which case she can
5210 set any valid user or group as the owner
5211
5212 We request below both SE_TAKE_OWNERSHIP and SE_RESTORE
5213 privileges, and disregard any failures in obtaining them. If
5214 these privileges cannot be obtained, and do not already exist in
5215 the calling thread's security token, this function could fail
5216 with EPERM. */
5217 if (enable_privilege (SE_TAKE_OWNERSHIP_NAME, TRUE, &old1))
5218 st++;
5219 if (enable_privilege (SE_RESTORE_NAME, TRUE, &old2))
5220 st++;
5221
5222 e = errno;
5223 errno = 0;
84e5ed96 5224 if (!set_file_security ((char *)fname, flags, (PSECURITY_DESCRIPTOR)acl))
474d441e 5225 {
84e5ed96 5226 err = GetLastError ();
40ff07a5 5227
84e5ed96
EZ		 5228 if (errno == ENOTSUP)
5229 ;
5230 else if (err == ERROR_INVALID_OWNER
5231 || err == ERROR_NOT_ALL_ASSIGNED
5232 || err == ERROR_ACCESS_DENIED)
40ff07a5 5233 {
84e5ed96
EZ		 5234 /* Maybe the requested ACL and the one the file already has
5235 are identical, in which case we can silently ignore the
5236 failure. (And no, Windows doesn't.) */
5237 acl_t current_acl = acl_get_file (fname, ACL_TYPE_ACCESS);
40ff07a5 5238
84e5ed96
EZ		 5239 errno = EPERM;
5240 if (current_acl)
40ff07a5 5241 {
84e5ed96
EZ		 5242 char *acl_from = acl_to_text (current_acl, NULL);
5243 char *acl_to = acl_to_text (acl, NULL);
5244
5245 if (acl_from && acl_to && xstrcasecmp (acl_from, acl_to) == 0)
5246 {
5247 retval = 0;
5248 errno = e;
5249 }
5250 if (acl_from)
5251 acl_free (acl_from);
5252 if (acl_to)
5253 acl_free (acl_to);
5254 acl_free (current_acl);
40ff07a5 5255 }
40ff07a5 5256 }
84e5ed96
EZ		 5257 else if (err == ERROR_FILE_NOT_FOUND || err == ERROR_PATH_NOT_FOUND)
5258 errno = ENOENT;
5259 else
5260 errno = EACCES;
5261 }
5262 else
5263 {
5264 retval = 0;
5265 errno = e;
5266 }
5267
5268 if (st)
5269 {
5270 if (st >= 2)
5271 restore_privilege (&old2);
5272 restore_privilege (&old1);
5273 revert_to_self ();
40ff07a5 5274 }
66447e07
EZ		 5275
5276 return retval;
5277}
5278
5279\f
6dad7178
EZ		 5280/* MS-Windows version of careadlinkat (cf. ../lib/careadlinkat.c). We
5281 have a fixed max size for file names, so we don't need the kind of
5282 alloc/malloc/realloc dance the gnulib version does. We also don't
5283 support FD-relative symlinks. */
973f782d
EZ		 5284char *
5285careadlinkat (int fd, char const *filename,
5286 char *buffer, size_t buffer_size,
5287 struct allocator const *alloc,
5288 ssize_t (*preadlinkat) (int, char const *, char *, size_t))
5289{
6dad7178
EZ		 5290 char linkname[MAX_PATH];
5291 ssize_t link_size;
5292
6dad7178
EZ		 5293 link_size = preadlinkat (fd, filename, linkname, sizeof(linkname));
5294
5295 if (link_size > 0)
5296 {
5297 char *retval = buffer;
5298
5299 linkname[link_size++] = '\0';
5300 if (link_size > buffer_size)
5301 retval = (char *)(alloc ? alloc->allocate : xmalloc) (link_size);
5302 if (retval)
5303 memcpy (retval, linkname, link_size);
5304
5305 return retval;
5306 }
973f782d
EZ		 5307 return NULL;
5308}
5309
0f7bb05d 5310\f
7c80d5ec
EZ		 5311/* Support for browsing other processes and their attributes. See
5312 process.c for the Lisp bindings. */
5313
5314/* Helper wrapper functions. */
5315
bedf4aab
JB		 5316static HANDLE WINAPI
5317create_toolhelp32_snapshot (DWORD Flags, DWORD Ignored)
7c80d5ec
EZ		 5318{
5319 static CreateToolhelp32Snapshot_Proc s_pfn_Create_Toolhelp32_Snapshot = NULL;
5320
5321 if (g_b_init_create_toolhelp32_snapshot == 0)
5322 {
5323 g_b_init_create_toolhelp32_snapshot = 1;
5324 s_pfn_Create_Toolhelp32_Snapshot = (CreateToolhelp32Snapshot_Proc)
5325 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5326 "CreateToolhelp32Snapshot");
5327 }
5328 if (s_pfn_Create_Toolhelp32_Snapshot == NULL)
5329 {
5330 return INVALID_HANDLE_VALUE;
5331 }
5332 return (s_pfn_Create_Toolhelp32_Snapshot (Flags, Ignored));
5333}
5334
bedf4aab
JB		 5335static BOOL WINAPI
5336process32_first (HANDLE hSnapshot, LPPROCESSENTRY32 lppe)
7c80d5ec
EZ		 5337{
5338 static Process32First_Proc s_pfn_Process32_First = NULL;
5339
5340 if (g_b_init_process32_first == 0)
5341 {
5342 g_b_init_process32_first = 1;
5343 s_pfn_Process32_First = (Process32First_Proc)
5344 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5345 "Process32First");
5346 }
5347 if (s_pfn_Process32_First == NULL)
5348 {
5349 return FALSE;
5350 }
5351 return (s_pfn_Process32_First (hSnapshot, lppe));
5352}
5353
bedf4aab
JB		 5354static BOOL WINAPI
5355process32_next (HANDLE hSnapshot, LPPROCESSENTRY32 lppe)
7c80d5ec
EZ		 5356{
5357 static Process32Next_Proc s_pfn_Process32_Next = NULL;
5358
5359 if (g_b_init_process32_next == 0)
5360 {
5361 g_b_init_process32_next = 1;
5362 s_pfn_Process32_Next = (Process32Next_Proc)
5363 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5364 "Process32Next");
5365 }
5366 if (s_pfn_Process32_Next == NULL)
5367 {
5368 return FALSE;
5369 }
5370 return (s_pfn_Process32_Next (hSnapshot, lppe));
5371}
5372
bedf4aab
JB		 5373static BOOL WINAPI
5374open_thread_token (HANDLE ThreadHandle,
5375 DWORD DesiredAccess,
5376 BOOL OpenAsSelf,
5377 PHANDLE TokenHandle)
7c80d5ec
EZ		 5378{
5379 static OpenThreadToken_Proc s_pfn_Open_Thread_Token = NULL;
5380 HMODULE hm_advapi32 = NULL;
5381 if (is_windows_9x () == TRUE)
5382 {
5383 SetLastError (ERROR_NOT_SUPPORTED);
5384 return FALSE;
5385 }
5386 if (g_b_init_open_thread_token == 0)
5387 {
5388 g_b_init_open_thread_token = 1;
5389 hm_advapi32 = LoadLibrary ("Advapi32.dll");
5390 s_pfn_Open_Thread_Token =
5391 (OpenThreadToken_Proc) GetProcAddress (hm_advapi32, "OpenThreadToken");
5392 }
5393 if (s_pfn_Open_Thread_Token == NULL)
5394 {
5395 SetLastError (ERROR_NOT_SUPPORTED);
5396 return FALSE;
5397 }
5398 return (
5399 s_pfn_Open_Thread_Token (
5400 ThreadHandle,
5401 DesiredAccess,
5402 OpenAsSelf,
5403 TokenHandle)
5404 );
5405}
5406
bedf4aab
JB		 5407static BOOL WINAPI
5408impersonate_self (SECURITY_IMPERSONATION_LEVEL ImpersonationLevel)
7c80d5ec
EZ		 5409{
5410 static ImpersonateSelf_Proc s_pfn_Impersonate_Self = NULL;
5411 HMODULE hm_advapi32 = NULL;
5412 if (is_windows_9x () == TRUE)
5413 {
5414 return FALSE;
5415 }
5416 if (g_b_init_impersonate_self == 0)
5417 {
5418 g_b_init_impersonate_self = 1;
5419 hm_advapi32 = LoadLibrary ("Advapi32.dll");
5420 s_pfn_Impersonate_Self =
5421 (ImpersonateSelf_Proc) GetProcAddress (hm_advapi32, "ImpersonateSelf");
5422 }
5423 if (s_pfn_Impersonate_Self == NULL)
5424 {
5425 return FALSE;
5426 }
5427 return s_pfn_Impersonate_Self (ImpersonationLevel);
5428}
5429
bedf4aab
JB		 5430static BOOL WINAPI
5431revert_to_self (void)
7c80d5ec
EZ		 5432{
5433 static RevertToSelf_Proc s_pfn_Revert_To_Self = NULL;
5434 HMODULE hm_advapi32 = NULL;
5435 if (is_windows_9x () == TRUE)
5436 {
5437 return FALSE;
5438 }
5439 if (g_b_init_revert_to_self == 0)
5440 {
5441 g_b_init_revert_to_self = 1;
5442 hm_advapi32 = LoadLibrary ("Advapi32.dll");
5443 s_pfn_Revert_To_Self =
5444 (RevertToSelf_Proc) GetProcAddress (hm_advapi32, "RevertToSelf");
5445 }
5446 if (s_pfn_Revert_To_Self == NULL)
5447 {
5448 return FALSE;
5449 }
5450 return s_pfn_Revert_To_Self ();
5451}
5452
bedf4aab
JB		 5453static BOOL WINAPI
5454get_process_memory_info (HANDLE h_proc,
5455 PPROCESS_MEMORY_COUNTERS mem_counters,
5456 DWORD bufsize)
7c80d5ec
EZ		 5457{
5458 static GetProcessMemoryInfo_Proc s_pfn_Get_Process_Memory_Info = NULL;
5459 HMODULE hm_psapi = NULL;
5460 if (is_windows_9x () == TRUE)
5461 {
5462 return FALSE;
5463 }
5464 if (g_b_init_get_process_memory_info == 0)
5465 {
5466 g_b_init_get_process_memory_info = 1;
5467 hm_psapi = LoadLibrary ("Psapi.dll");
5468 if (hm_psapi)
5469 s_pfn_Get_Process_Memory_Info = (GetProcessMemoryInfo_Proc)
5470 GetProcAddress (hm_psapi, "GetProcessMemoryInfo");
5471 }
5472 if (s_pfn_Get_Process_Memory_Info == NULL)
5473 {
5474 return FALSE;
5475 }
5476 return s_pfn_Get_Process_Memory_Info (h_proc, mem_counters, bufsize);
5477}
5478
bedf4aab
JB		 5479static BOOL WINAPI
5480get_process_working_set_size (HANDLE h_proc,
cb576b5c
FP		 5481 PSIZE_T minrss,
5482 PSIZE_T maxrss)
7c80d5ec
EZ		 5483{
5484 static GetProcessWorkingSetSize_Proc
5485 s_pfn_Get_Process_Working_Set_Size = NULL;
5486
5487 if (is_windows_9x () == TRUE)
5488 {
5489 return FALSE;
5490 }
5491 if (g_b_init_get_process_working_set_size == 0)
5492 {
5493 g_b_init_get_process_working_set_size = 1;
5494 s_pfn_Get_Process_Working_Set_Size = (GetProcessWorkingSetSize_Proc)
5495 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5496 "GetProcessWorkingSetSize");
5497 }
5498 if (s_pfn_Get_Process_Working_Set_Size == NULL)
5499 {
5500 return FALSE;
5501 }
5502 return s_pfn_Get_Process_Working_Set_Size (h_proc, minrss, maxrss);
5503}
5504
bedf4aab
JB		 5505static BOOL WINAPI
5506global_memory_status (MEMORYSTATUS *buf)
7c80d5ec
EZ		 5507{
5508 static GlobalMemoryStatus_Proc s_pfn_Global_Memory_Status = NULL;
5509
5510 if (is_windows_9x () == TRUE)
5511 {
5512 return FALSE;
5513 }
5514 if (g_b_init_global_memory_status == 0)
5515 {
5516 g_b_init_global_memory_status = 1;
5517 s_pfn_Global_Memory_Status = (GlobalMemoryStatus_Proc)
5518 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5519 "GlobalMemoryStatus");
5520 }
5521 if (s_pfn_Global_Memory_Status == NULL)
5522 {
5523 return FALSE;
5524 }
5525 return s_pfn_Global_Memory_Status (buf);
5526}
5527
bedf4aab
JB		 5528static BOOL WINAPI
5529global_memory_status_ex (MEMORY_STATUS_EX *buf)
7c80d5ec
EZ		 5530{
5531 static GlobalMemoryStatusEx_Proc s_pfn_Global_Memory_Status_Ex = NULL;
5532
5533 if (is_windows_9x () == TRUE)
5534 {
5535 return FALSE;
5536 }
5537 if (g_b_init_global_memory_status_ex == 0)
5538 {
5539 g_b_init_global_memory_status_ex = 1;
5540 s_pfn_Global_Memory_Status_Ex = (GlobalMemoryStatusEx_Proc)
5541 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5542 "GlobalMemoryStatusEx");
5543 }
5544 if (s_pfn_Global_Memory_Status_Ex == NULL)
5545 {
5546 return FALSE;
5547 }
5548 return s_pfn_Global_Memory_Status_Ex (buf);
5549}
5550
5551Lisp_Object
b56ceb92 5552list_system_processes (void)
7c80d5ec
EZ		 5553{
5554 struct gcpro gcpro1;
5555 Lisp_Object proclist = Qnil;
5556 HANDLE h_snapshot;
5557
5558 h_snapshot = create_toolhelp32_snapshot (TH32CS_SNAPPROCESS, 0);
5559
5560 if (h_snapshot != INVALID_HANDLE_VALUE)
5561 {
5562 PROCESSENTRY32 proc_entry;
5563 DWORD proc_id;
5564 BOOL res;
5565
5566 GCPRO1 (proclist);
5567
5568 proc_entry.dwSize = sizeof (PROCESSENTRY32);
5569 for (res = process32_first (h_snapshot, &proc_entry); res;
5570 res = process32_next (h_snapshot, &proc_entry))
5571 {
5572 proc_id = proc_entry.th32ProcessID;
5573 proclist = Fcons (make_fixnum_or_float (proc_id), proclist);
5574 }
5575
5576 CloseHandle (h_snapshot);
5577 UNGCPRO;
5578 proclist = Fnreverse (proclist);
5579 }
5580
5581 return proclist;
5582}
5583
5584static int
5585enable_privilege (LPCTSTR priv_name, BOOL enable_p, TOKEN_PRIVILEGES *old_priv)
5586{
5587 TOKEN_PRIVILEGES priv;
5588 DWORD priv_size = sizeof (priv);
5589 DWORD opriv_size = sizeof (*old_priv);
5590 HANDLE h_token = NULL;
5591 HANDLE h_thread = GetCurrentThread ();
5592 int ret_val = 0;
5593 BOOL res;
5594
5595 res = open_thread_token (h_thread,
5596 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
5597 FALSE, &h_token);
5598 if (!res && GetLastError () == ERROR_NO_TOKEN)
5599 {
5600 if (impersonate_self (SecurityImpersonation))
5601 res = open_thread_token (h_thread,
5602 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
5603 FALSE, &h_token);
5604 }
5605 if (res)
5606 {
5607 priv.PrivilegeCount = 1;
5608 priv.Privileges[0].Attributes = enable_p ? SE_PRIVILEGE_ENABLED : 0;
5609 LookupPrivilegeValue (NULL, priv_name, &priv.Privileges[0].Luid);
5610 if (AdjustTokenPrivileges (h_token, FALSE, &priv, priv_size,
5611 old_priv, &opriv_size)
5612 && GetLastError () != ERROR_NOT_ALL_ASSIGNED)
5613 ret_val = 1;
5614 }
5615 if (h_token)
5616 CloseHandle (h_token);
5617
5618 return ret_val;
5619}
5620
5621static int
5622restore_privilege (TOKEN_PRIVILEGES *priv)
5623{
5624 DWORD priv_size = sizeof (*priv);
5625 HANDLE h_token = NULL;
5626 int ret_val = 0;
5627
5628 if (open_thread_token (GetCurrentThread (),
5629 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
5630 FALSE, &h_token))
5631 {
5632 if (AdjustTokenPrivileges (h_token, FALSE, priv, priv_size, NULL, NULL)
5633 && GetLastError () != ERROR_NOT_ALL_ASSIGNED)
5634 ret_val = 1;
5635 }
5636 if (h_token)
5637 CloseHandle (h_token);
5638
5639 return ret_val;
5640}
5641
ca300656 5642static Lisp_Object
d35af63c 5643ltime (ULONGLONG time_100ns)
7c80d5ec 5644{
d35af63c
PE		 5645 ULONGLONG time_sec = time_100ns / 10000000;
5646 int subsec = time_100ns % 10000000;
3de717bd
DA		 5647 return list4i (time_sec >> 16, time_sec & 0xffff,
5648 subsec / 10, subsec % 10 * 100000);
7c80d5ec
EZ		 5649}
5650
d35af63c 5651#define U64_TO_LISP_TIME(time) ltime (time)
5da9424d 5652
7c80d5ec 5653static int
b56ceb92
JB		 5654process_times (HANDLE h_proc, Lisp_Object *ctime, Lisp_Object *etime,
5655 Lisp_Object *stime, Lisp_Object *utime, Lisp_Object *ttime,
5656 double *pcpu)
7c80d5ec
EZ		 5657{
5658 FILETIME ft_creation, ft_exit, ft_kernel, ft_user, ft_current;
5da9424d 5659 ULONGLONG tem1, tem2, tem3, tem;
7c80d5ec
EZ		 5660
5661 if (!h_proc
5662 || !get_process_times_fn
ed3751c8
JB		 5663 || !(*get_process_times_fn) (h_proc, &ft_creation, &ft_exit,
5664 &ft_kernel, &ft_user))
7c80d5ec
EZ		 5665 return 0;
5666
5667 GetSystemTimeAsFileTime (&ft_current);
5668
5da9424d 5669 FILETIME_TO_U64 (tem1, ft_kernel);
5da9424d
JB		 5670 *stime = U64_TO_LISP_TIME (tem1);
5671
5672 FILETIME_TO_U64 (tem2, ft_user);
5da9424d
JB		 5673 *utime = U64_TO_LISP_TIME (tem2);
5674
5675 tem3 = tem1 + tem2;
5676 *ttime = U64_TO_LISP_TIME (tem3);
5677
5678 FILETIME_TO_U64 (tem, ft_creation);
3af03101
EZ		 5679 /* Process no 4 (System) returns zero creation time. */
5680 if (tem)
d35af63c 5681 tem -= utc_base;
5da9424d
JB		 5682 *ctime = U64_TO_LISP_TIME (tem);
5683
3af03101 5684 if (tem)
5da9424d
JB		 5685 {
5686 FILETIME_TO_U64 (tem3, ft_current);
d35af63c 5687 tem = (tem3 - utc_base) - tem;
5da9424d
JB		 5688 }
5689 *etime = U64_TO_LISP_TIME (tem);
7c80d5ec 5690
3af03101
EZ		 5691 if (tem)
5692 {
5693 *pcpu = 100.0 * (tem1 + tem2) / tem;
5694 if (*pcpu > 100)
5695 *pcpu = 100.0;
5696 }
5697 else
5698 *pcpu = 0;
5699
5700 return 1;
7c80d5ec
EZ		 5701}
5702
5703Lisp_Object
b56ceb92 5704system_process_attributes (Lisp_Object pid)
7c80d5ec
EZ		 5705{
5706 struct gcpro gcpro1, gcpro2, gcpro3;
5707 Lisp_Object attrs = Qnil;
5708 Lisp_Object cmd_str, decoded_cmd, tem;
5709 HANDLE h_snapshot, h_proc;
5710 DWORD proc_id;
754a2d13 5711 int found_proc = 0;
7c80d5ec 5712 char uname[UNLEN+1], gname[GNLEN+1], domain[1025];
32cef06e 5713 DWORD ulength = sizeof (uname), dlength = sizeof (domain), needed;
7c80d5ec
EZ		 5714 DWORD glength = sizeof (gname);
5715 HANDLE token = NULL;
5716 SID_NAME_USE user_type;
32cef06e
EZ		 5717 unsigned char *buf = NULL;
5718 DWORD blen = 0;
7c80d5ec
EZ		 5719 TOKEN_USER user_token;
5720 TOKEN_PRIMARY_GROUP group_token;
22749e9a
EZ		 5721 unsigned euid;
5722 unsigned egid;
7c80d5ec
EZ		 5723 PROCESS_MEMORY_COUNTERS mem;
5724 PROCESS_MEMORY_COUNTERS_EX mem_ex;
cb576b5c 5725 SIZE_T minrss, maxrss;
7c80d5ec 5726 MEMORYSTATUS memst;
b8526f6e 5727 MEMORY_STATUS_EX memstex;
7c80d5ec 5728 double totphys = 0.0;
031da700 5729 Lisp_Object ctime, stime, utime, etime, ttime;
7c80d5ec 5730 double pcpu;
32cef06e 5731 BOOL result = FALSE;
7c80d5ec
EZ		 5732
5733 CHECK_NUMBER_OR_FLOAT (pid);
5734 proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid);
5735
5736 h_snapshot = create_toolhelp32_snapshot (TH32CS_SNAPPROCESS, 0);
5737
5738 GCPRO3 (attrs, decoded_cmd, tem);
5739
5740 if (h_snapshot != INVALID_HANDLE_VALUE)
5741 {
5742 PROCESSENTRY32 pe;
5743 BOOL res;
5744
5745 pe.dwSize = sizeof (PROCESSENTRY32);
5746 for (res = process32_first (h_snapshot, &pe); res;
5747 res = process32_next (h_snapshot, &pe))
5748 {
5749 if (proc_id == pe.th32ProcessID)
5750 {
5751 if (proc_id == 0)
5752 decoded_cmd = build_string ("Idle");
5753 else
5754 {
5755 /* Decode the command name from locale-specific
5756 encoding. */
5757 cmd_str = make_unibyte_string (pe.szExeFile,
5758 strlen (pe.szExeFile));
5759 decoded_cmd =
5760 code_convert_string_norecord (cmd_str,
5761 Vlocale_coding_system, 0);
5762 }
5763 attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
5764 attrs = Fcons (Fcons (Qppid,
5765 make_fixnum_or_float (pe.th32ParentProcessID)),
5766 attrs);
5767 attrs = Fcons (Fcons (Qpri, make_number (pe.pcPriClassBase)),
5768 attrs);
5769 attrs = Fcons (Fcons (Qthcount,
5770 make_fixnum_or_float (pe.cntThreads)),
5771 attrs);
754a2d13 5772 found_proc = 1;
7c80d5ec
EZ		 5773 break;
5774 }
5775 }
5776
5777 CloseHandle (h_snapshot);
5778 }
5779
754a2d13
EZ		 5780 if (!found_proc)
5781 {
5782 UNGCPRO;
5783 return Qnil;
5784 }
5785
7c80d5ec
EZ		 5786 h_proc = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
5787 FALSE, proc_id);
5788 /* If we were denied a handle to the process, try again after
5789 enabling the SeDebugPrivilege in our process. */
5790 if (!h_proc)
5791 {
5792 TOKEN_PRIVILEGES priv_current;
5793
5794 if (enable_privilege (SE_DEBUG_NAME, TRUE, &priv_current))
5795 {
5796 h_proc = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
5797 FALSE, proc_id);
5798 restore_privilege (&priv_current);
5799 revert_to_self ();
5800 }
5801 }
32cef06e 5802 if (h_proc)
7c80d5ec 5803 {
32cef06e
EZ		 5804 result = open_process_token (h_proc, TOKEN_QUERY, &token);
5805 if (result)
f8b35b24 5806 {
32cef06e
EZ		 5807 result = get_token_information (token, TokenUser, NULL, 0, &blen);
5808 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
5809 {
5810 buf = xmalloc (blen);
5811 result = get_token_information (token, TokenUser,
5812 (LPVOID)buf, blen, &needed);
5813 if (result)
5814 {
5815 memcpy (&user_token, buf, sizeof (user_token));
5816 if (!w32_cached_id (user_token.User.Sid, &euid, uname))
5817 {
5818 euid = get_rid (user_token.User.Sid);
5819 result = lookup_account_sid (NULL, user_token.User.Sid,
5820 uname, &ulength,
5821 domain, &dlength,
5822 &user_type);
5823 if (result)
5824 w32_add_to_cache (user_token.User.Sid, euid, uname);
5825 else
5826 {
5827 strcpy (uname, "unknown");
5828 result = TRUE;
5829 }
5830 }
5831 ulength = strlen (uname);
5832 }
5833 }
7c80d5ec 5834 }
32cef06e 5835 if (result)
7c80d5ec 5836 {
32cef06e
EZ		 5837 /* Determine a reasonable euid and gid values. */
5838 if (xstrcasecmp ("administrator", uname) == 0)
7c80d5ec 5839 {
32cef06e
EZ		 5840 euid = 500; /* well-known Administrator uid */
5841 egid = 513; /* well-known None gid */
5842 }
5843 else
5844 {
5845 /* Get group id and name. */
5846 result = get_token_information (token, TokenPrimaryGroup,
5847 (LPVOID)buf, blen, &needed);
5848 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
f8b35b24 5849 {
32cef06e
EZ		 5850 buf = xrealloc (buf, blen = needed);
5851 result = get_token_information (token, TokenPrimaryGroup,
5852 (LPVOID)buf, blen, &needed);
5853 }
5854 if (result)
5855 {
5856 memcpy (&group_token, buf, sizeof (group_token));
5857 if (!w32_cached_id (group_token.PrimaryGroup, &egid, gname))
5858 {
5859 egid = get_rid (group_token.PrimaryGroup);
5860 dlength = sizeof (domain);
5861 result =
5862 lookup_account_sid (NULL, group_token.PrimaryGroup,
5863 gname, &glength, NULL, &dlength,
5864 &user_type);
5865 if (result)
5866 w32_add_to_cache (group_token.PrimaryGroup,
5867 egid, gname);
5868 else
5869 {
5870 strcpy (gname, "None");
5871 result = TRUE;
5872 }
5873 }
5874 glength = strlen (gname);
f8b35b24 5875 }
7c80d5ec 5876 }
7c80d5ec 5877 }
5f445726 5878 xfree (buf);
7c80d5ec 5879 }
32cef06e 5880 if (!result)
7c80d5ec 5881 {
32cef06e
EZ		 5882 if (!is_windows_9x ())
5883 {
5884 /* We couldn't open the process token, presumably because of
5885 insufficient access rights. Assume this process is run
5886 by the system. */
5887 strcpy (uname, "SYSTEM");
5888 strcpy (gname, "None");
5889 euid = 18; /* SYSTEM */
5890 egid = 513; /* None */
5891 glength = strlen (gname);
5892 ulength = strlen (uname);
5893 }
5894 /* If we are running under Windows 9X, where security calls are
5895 not supported, we assume all processes are run by the current
5896 user. */
5897 else if (GetUserName (uname, &ulength))
5898 {
5899 if (xstrcasecmp ("administrator", uname) == 0)
5900 euid = 0;
5901 else
5902 euid = 123;
5903 egid = euid;
5904 strcpy (gname, "None");
5905 glength = strlen (gname);
5906 ulength = strlen (uname);
5907 }
7c80d5ec 5908 else
32cef06e
EZ		 5909 {
5910 euid = 123;
5911 egid = 123;
5912 strcpy (uname, "administrator");
5913 ulength = strlen (uname);
5914 strcpy (gname, "None");
5915 glength = strlen (gname);
5916 }
5917 if (token)
5918 CloseHandle (token);
7c80d5ec 5919 }
7c80d5ec
EZ		 5920
5921 attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (euid)), attrs);
5922 tem = make_unibyte_string (uname, ulength);
5923 attrs = Fcons (Fcons (Quser,
5924 code_convert_string_norecord (tem, Vlocale_coding_system, 0)),
5925 attrs);
5926 attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (egid)), attrs);
5927 tem = make_unibyte_string (gname, glength);
5928 attrs = Fcons (Fcons (Qgroup,
5929 code_convert_string_norecord (tem, Vlocale_coding_system, 0)),
5930 attrs);
5931
5932 if (global_memory_status_ex (&memstex))
235661f6 5933#if __GNUC__ || (defined (_MSC_VER) && _MSC_VER >= 1300)
7c80d5ec 5934 totphys = memstex.ullTotalPhys / 1024.0;
235661f6
EZ		 5935#else
5936 /* Visual Studio 6 cannot convert an unsigned __int64 type to
5937 double, so we need to do this for it... */
5938 {
5939 DWORD tot_hi = memstex.ullTotalPhys >> 32;
5940 DWORD tot_md = (memstex.ullTotalPhys & 0x00000000ffffffff) >> 10;
5941 DWORD tot_lo = memstex.ullTotalPhys % 1024;
5942
5943 totphys = tot_hi * 4194304.0 + tot_md + tot_lo / 1024.0;
5944 }
5945#endif /* __GNUC__ || _MSC_VER >= 1300 */
7c80d5ec
EZ		 5946 else if (global_memory_status (&memst))
5947 totphys = memst.dwTotalPhys / 1024.0;
5948
5949 if (h_proc
5950 && get_process_memory_info (h_proc, (PROCESS_MEMORY_COUNTERS *)&mem_ex,
5951 sizeof (mem_ex)))
5952 {
cb576b5c 5953 SIZE_T rss = mem_ex.WorkingSetSize / 1024;
7c80d5ec
EZ		 5954
5955 attrs = Fcons (Fcons (Qmajflt,
5956 make_fixnum_or_float (mem_ex.PageFaultCount)),
5957 attrs);
5958 attrs = Fcons (Fcons (Qvsize,
5959 make_fixnum_or_float (mem_ex.PrivateUsage / 1024)),
5960 attrs);
5961 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (rss)), attrs);
5962 if (totphys)
5963 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
5964 }
5965 else if (h_proc
5966 && get_process_memory_info (h_proc, &mem, sizeof (mem)))
5967 {
cb576b5c 5968 SIZE_T rss = mem_ex.WorkingSetSize / 1024;
7c80d5ec
EZ		 5969
5970 attrs = Fcons (Fcons (Qmajflt,
5971 make_fixnum_or_float (mem.PageFaultCount)),
5972 attrs);
5973 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (rss)), attrs);
5974 if (totphys)
5975 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
5976 }
5977 else if (h_proc
5978 && get_process_working_set_size (h_proc, &minrss, &maxrss))
5979 {
5980 DWORD rss = maxrss / 1024;
5981
5982 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (maxrss / 1024)), attrs);
5983 if (totphys)
5984 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
5985 }
5986
031da700 5987 if (process_times (h_proc, &ctime, &etime, &stime, &utime, &ttime, &pcpu))
7c80d5ec
EZ		 5988 {
5989 attrs = Fcons (Fcons (Qutime, utime), attrs);
5990 attrs = Fcons (Fcons (Qstime, stime), attrs);
031da700 5991 attrs = Fcons (Fcons (Qtime, ttime), attrs);
7c80d5ec
EZ		 5992 attrs = Fcons (Fcons (Qstart, ctime), attrs);
5993 attrs = Fcons (Fcons (Qetime, etime), attrs);
5994 attrs = Fcons (Fcons (Qpcpu, make_float (pcpu)), attrs);
5995 }
5996
5997 /* FIXME: Retrieve command line by walking the PEB of the process. */
5998
5999 if (h_proc)
6000 CloseHandle (h_proc);
6001 UNGCPRO;
6002 return attrs;
6003}
6004
6005\f
480b0c5b
GV		 6006/* Wrappers for winsock functions to map between our file descriptors
6007 and winsock's handles; also set h_errno for convenience.
6008
6009 To allow Emacs to run on systems which don't have winsock support
6010 installed, we dynamically link to winsock on startup if present, and
6011 otherwise provide the minimum necessary functionality
6012 (eg. gethostname). */
6013
6014/* function pointers for relevant socket functions */
6015int (PASCAL *pfn_WSAStartup) (WORD wVersionRequired, LPWSADATA lpWSAData);
6016void (PASCAL *pfn_WSASetLastError) (int iError);
6017int (PASCAL *pfn_WSAGetLastError) (void);
26fb7bc4 6018int (PASCAL *pfn_WSAEventSelect) (SOCKET s, HANDLE hEventObject, long lNetworkEvents);
64570b36
KS		 6019HANDLE (PASCAL *pfn_WSACreateEvent) (void);
6020int (PASCAL *pfn_WSACloseEvent) (HANDLE hEvent);
480b0c5b
GV		 6021int (PASCAL *pfn_socket) (int af, int type, int protocol);
6022int (PASCAL *pfn_bind) (SOCKET s, const struct sockaddr *addr, int namelen);
6023int (PASCAL *pfn_connect) (SOCKET s, const struct sockaddr *addr, int namelen);
6024int (PASCAL *pfn_ioctlsocket) (SOCKET s, long cmd, u_long *argp);
6025int (PASCAL *pfn_recv) (SOCKET s, char * buf, int len, int flags);
6026int (PASCAL *pfn_send) (SOCKET s, const char * buf, int len, int flags);
6027int (PASCAL *pfn_closesocket) (SOCKET s);
6028int (PASCAL *pfn_shutdown) (SOCKET s, int how);
6029int (PASCAL *pfn_WSACleanup) (void);
6030
6031u_short (PASCAL *pfn_htons) (u_short hostshort);
6032u_short (PASCAL *pfn_ntohs) (u_short netshort);
6033unsigned long (PASCAL *pfn_inet_addr) (const char * cp);
6034int (PASCAL *pfn_gethostname) (char * name, int namelen);
6035struct hostent * (PASCAL *pfn_gethostbyname) (const char * name);
6036struct servent * (PASCAL *pfn_getservbyname) (const char * name, const char * proto);
ecd270eb 6037int (PASCAL *pfn_getpeername) (SOCKET s, struct sockaddr *addr, int * namelen);
962955c5
JR		 6038int (PASCAL *pfn_setsockopt) (SOCKET s, int level, int optname,
6039 const char * optval, int optlen);
6040int (PASCAL *pfn_listen) (SOCKET s, int backlog);
6041int (PASCAL *pfn_getsockname) (SOCKET s, struct sockaddr * name,
6042 int * namelen);
6043SOCKET (PASCAL *pfn_accept) (SOCKET s, struct sockaddr * addr, int * addrlen);
6044int (PASCAL *pfn_recvfrom) (SOCKET s, char * buf, int len, int flags,
6045 struct sockaddr * from, int * fromlen);
6046int (PASCAL *pfn_sendto) (SOCKET s, const char * buf, int len, int flags,
6047 const struct sockaddr * to, int tolen);
6048
f1614061
RS		 6049/* SetHandleInformation is only needed to make sockets non-inheritable. */
6050BOOL (WINAPI *pfn_SetHandleInformation) (HANDLE object, DWORD mask, DWORD flags);
6051#ifndef HANDLE_FLAG_INHERIT
6052#define HANDLE_FLAG_INHERIT 1
6053#endif
480b0c5b 6054
f249a012
RS		 6055HANDLE winsock_lib;
6056static int winsock_inuse;
480b0c5b 6057
f249a012 6058BOOL
480b0c5b
GV		 6059term_winsock (void)
6060{
f249a012 6061 if (winsock_lib != NULL && winsock_inuse == 0)
480b0c5b 6062 {
f249a012
RS		 6063 /* Not sure what would cause WSAENETDOWN, or even if it can happen
6064 after WSAStartup returns successfully, but it seems reasonable
6065 to allow unloading winsock anyway in that case. */
6066 if (pfn_WSACleanup () == 0 ||
6067 pfn_WSAGetLastError () == WSAENETDOWN)
6068 {
6069 if (FreeLibrary (winsock_lib))
6070 winsock_lib = NULL;
6071 return TRUE;
6072 }
480b0c5b 6073 }
f249a012 6074 return FALSE;
480b0c5b
GV		 6075}
6076
f249a012
RS		 6077BOOL
6078init_winsock (int load_now)
480b0c5b
GV		 6079{
6080 WSADATA winsockData;
6081
f249a012
RS		 6082 if (winsock_lib != NULL)
6083 return TRUE;
f1614061 6084
f1614061
RS		 6085 pfn_SetHandleInformation
6086 = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"),
6087 "SetHandleInformation");
6088
64570b36 6089 winsock_lib = LoadLibrary ("Ws2_32.dll");
480b0c5b
GV		 6090
6091 if (winsock_lib != NULL)
6092 {
6093 /* dynamically link to socket functions */
6094
6095#define LOAD_PROC(fn) \
6096 if ((pfn_##fn = (void *) GetProcAddress (winsock_lib, #fn)) == NULL) \
6097 goto fail;
6098
ed3751c8
JB		 6099 LOAD_PROC (WSAStartup);
6100 LOAD_PROC (WSASetLastError);
6101 LOAD_PROC (WSAGetLastError);
6102 LOAD_PROC (WSAEventSelect);
6103 LOAD_PROC (WSACreateEvent);
6104 LOAD_PROC (WSACloseEvent);
6105 LOAD_PROC (socket);
6106 LOAD_PROC (bind);
6107 LOAD_PROC (connect);
6108 LOAD_PROC (ioctlsocket);
6109 LOAD_PROC (recv);
6110 LOAD_PROC (send);
6111 LOAD_PROC (closesocket);
6112 LOAD_PROC (shutdown);
6113 LOAD_PROC (htons);
6114 LOAD_PROC (ntohs);
6115 LOAD_PROC (inet_addr);
6116 LOAD_PROC (gethostname);
6117 LOAD_PROC (gethostbyname);
6118 LOAD_PROC (getservbyname);
6119 LOAD_PROC (getpeername);
6120 LOAD_PROC (WSACleanup);
6121 LOAD_PROC (setsockopt);
6122 LOAD_PROC (listen);
6123 LOAD_PROC (getsockname);
6124 LOAD_PROC (accept);
6125 LOAD_PROC (recvfrom);
6126 LOAD_PROC (sendto);
f249a012
RS		 6127#undef LOAD_PROC
6128
480b0c5b
GV		 6129 /* specify version 1.1 of winsock */
6130 if (pfn_WSAStartup (0x101, &winsockData) == 0)
6131 {
f249a012
RS		 6132 if (winsockData.wVersion != 0x101)
6133 goto fail;
6134
6135 if (!load_now)
6136 {
6137 /* Report that winsock exists and is usable, but leave
6138 socket functions disabled. I am assuming that calling
6139 WSAStartup does not require any network interaction,
6140 and in particular does not cause or require a dial-up
6141 connection to be established. */
6142
6143 pfn_WSACleanup ();
6144 FreeLibrary (winsock_lib);
6145 winsock_lib = NULL;
6146 }
6147 winsock_inuse = 0;
6148 return TRUE;
480b0c5b
GV		 6149 }
6150
6151 fail:
6152 FreeLibrary (winsock_lib);
f249a012 6153 winsock_lib = NULL;
480b0c5b 6154 }
f249a012
RS		 6155
6156 return FALSE;
480b0c5b
GV		 6157}
6158
6159
6160int h_errno = 0;
6161
f277993b
EZ		 6162/* Function to map winsock error codes to errno codes for those errno
6163 code defined in errno.h (errno values not defined by errno.h are
6164 already in nt/inc/sys/socket.h). */
9bfb11f9 6165static void
b56ceb92 6166set_errno (void)
480b0c5b 6167{
f277993b
EZ		 6168 int wsa_err;
6169
6170 h_errno = 0;
f249a012 6171 if (winsock_lib == NULL)
f277993b 6172 wsa_err = EINVAL;
480b0c5b 6173 else
f277993b 6174 wsa_err = pfn_WSAGetLastError ();
480b0c5b 6175
f277993b 6176 switch (wsa_err)
480b0c5b 6177 {
f277993b
EZ		 6178 case WSAEACCES: errno = EACCES; break;
6179 case WSAEBADF: errno = EBADF; break;
6180 case WSAEFAULT: errno = EFAULT; break;
6181 case WSAEINTR: errno = EINTR; break;
6182 case WSAEINVAL: errno = EINVAL; break;
6183 case WSAEMFILE: errno = EMFILE; break;
6184 case WSAENAMETOOLONG: errno = ENAMETOOLONG; break;
6185 case WSAENOTEMPTY: errno = ENOTEMPTY; break;
6186 default: errno = wsa_err; break;
480b0c5b 6187 }
480b0c5b
GV		 6188}
6189
9bfb11f9 6190static void
b56ceb92 6191check_errno (void)
480b0c5b 6192{
f277993b
EZ		 6193 h_errno = 0;
6194 if (winsock_lib != NULL)
480b0c5b
GV		 6195 pfn_WSASetLastError (0);
6196}
6197
d8fcc1b9
AI		 6198/* Extend strerror to handle the winsock-specific error codes. */
6199struct {
6200 int errnum;
6201 char * msg;
6202} _wsa_errlist[] = {
1db5b1ad
JB		 6203 {WSAEINTR , "Interrupted function call"},
6204 {WSAEBADF , "Bad file descriptor"},
6205 {WSAEACCES , "Permission denied"},
6206 {WSAEFAULT , "Bad address"},
6207 {WSAEINVAL , "Invalid argument"},
6208 {WSAEMFILE , "Too many open files"},
6209
6210 {WSAEWOULDBLOCK , "Resource temporarily unavailable"},
6211 {WSAEINPROGRESS , "Operation now in progress"},
6212 {WSAEALREADY , "Operation already in progress"},
6213 {WSAENOTSOCK , "Socket operation on non-socket"},
6214 {WSAEDESTADDRREQ , "Destination address required"},
6215 {WSAEMSGSIZE , "Message too long"},
6216 {WSAEPROTOTYPE , "Protocol wrong type for socket"},
6217 {WSAENOPROTOOPT , "Bad protocol option"},
6218 {WSAEPROTONOSUPPORT , "Protocol not supported"},
6219 {WSAESOCKTNOSUPPORT , "Socket type not supported"},
6220 {WSAEOPNOTSUPP , "Operation not supported"},
6221 {WSAEPFNOSUPPORT , "Protocol family not supported"},
6222 {WSAEAFNOSUPPORT , "Address family not supported by protocol family"},
6223 {WSAEADDRINUSE , "Address already in use"},
6224 {WSAEADDRNOTAVAIL , "Cannot assign requested address"},
6225 {WSAENETDOWN , "Network is down"},
6226 {WSAENETUNREACH , "Network is unreachable"},
6227 {WSAENETRESET , "Network dropped connection on reset"},
6228 {WSAECONNABORTED , "Software caused connection abort"},
6229 {WSAECONNRESET , "Connection reset by peer"},
6230 {WSAENOBUFS , "No buffer space available"},
6231 {WSAEISCONN , "Socket is already connected"},
6232 {WSAENOTCONN , "Socket is not connected"},
6233 {WSAESHUTDOWN , "Cannot send after socket shutdown"},
6234 {WSAETOOMANYREFS , "Too many references"}, /* not sure */
6235 {WSAETIMEDOUT , "Connection timed out"},
6236 {WSAECONNREFUSED , "Connection refused"},
6237 {WSAELOOP , "Network loop"}, /* not sure */
6238 {WSAENAMETOOLONG , "Name is too long"},
6239 {WSAEHOSTDOWN , "Host is down"},
6240 {WSAEHOSTUNREACH , "No route to host"},
6241 {WSAENOTEMPTY , "Buffer not empty"}, /* not sure */
6242 {WSAEPROCLIM , "Too many processes"},
6243 {WSAEUSERS , "Too many users"}, /* not sure */
6244 {WSAEDQUOT , "Double quote in host name"}, /* really not sure */
6245 {WSAESTALE , "Data is stale"}, /* not sure */
6246 {WSAEREMOTE , "Remote error"}, /* not sure */
6247
6248 {WSASYSNOTREADY , "Network subsystem is unavailable"},
6249 {WSAVERNOTSUPPORTED , "WINSOCK.DLL version out of range"},
6250 {WSANOTINITIALISED , "Winsock not initialized successfully"},
6251 {WSAEDISCON , "Graceful shutdown in progress"},
d8fcc1b9 6252#ifdef WSAENOMORE
1db5b1ad
JB		 6253 {WSAENOMORE , "No more operations allowed"}, /* not sure */
6254 {WSAECANCELLED , "Operation cancelled"}, /* not sure */
6255 {WSAEINVALIDPROCTABLE , "Invalid procedure table from service provider"},
6256 {WSAEINVALIDPROVIDER , "Invalid service provider version number"},
6257 {WSAEPROVIDERFAILEDINIT , "Unable to initialize a service provider"},
6258 {WSASYSCALLFAILURE , "System call failure"},
6259 {WSASERVICE_NOT_FOUND , "Service not found"}, /* not sure */
6260 {WSATYPE_NOT_FOUND , "Class type not found"},
6261 {WSA_E_NO_MORE , "No more resources available"}, /* really not sure */
6262 {WSA_E_CANCELLED , "Operation already cancelled"}, /* really not sure */
6263 {WSAEREFUSED , "Operation refused"}, /* not sure */
d8fcc1b9 6264#endif
177c0ea7 6265
1db5b1ad
JB		 6266 {WSAHOST_NOT_FOUND , "Host not found"},
6267 {WSATRY_AGAIN , "Authoritative host not found during name lookup"},
6268 {WSANO_RECOVERY , "Non-recoverable error during name lookup"},
6269 {WSANO_DATA , "Valid name, no data record of requested type"},
d8fcc1b9 6270
1db5b1ad 6271 {-1, NULL}
d8fcc1b9
AI		 6272};
6273
6274char *
ed3751c8 6275sys_strerror (int error_no)
d8fcc1b9
AI		 6276{
6277 int i;
6278 static char unknown_msg[40];
6279
a302c7ae
AI		 6280 if (error_no >= 0 && error_no < sys_nerr)
6281 return sys_errlist[error_no];
d8fcc1b9
AI		 6282
6283 for (i = 0; _wsa_errlist[i].errnum >= 0; i++)
6284 if (_wsa_errlist[i].errnum == error_no)
6285 return _wsa_errlist[i].msg;
6286
ed3751c8 6287 sprintf (unknown_msg, "Unidentified error: %d", error_no);
d8fcc1b9
AI		 6288 return unknown_msg;
6289}
6290
480b0c5b
GV		 6291/* [andrewi 3-May-96] I've had conflicting results using both methods,
6292 but I believe the method of keeping the socket handle separate (and
6293 insuring it is not inheritable) is the correct one. */
6294
480b0c5b 6295#define SOCK_HANDLE(fd) ((SOCKET) fd_info[fd].hnd)
480b0c5b 6296
bedf4aab 6297static int socket_to_fd (SOCKET s);
962955c5 6298
480b0c5b 6299int
ed3751c8 6300sys_socket (int af, int type, int protocol)
480b0c5b 6301{
962955c5 6302 SOCKET s;
480b0c5b 6303
f249a012 6304 if (winsock_lib == NULL)
480b0c5b 6305 {
f277993b 6306 errno = ENETDOWN;
480b0c5b
GV		 6307 return INVALID_SOCKET;
6308 }
6309
6310 check_errno ();
6311
6312 /* call the real socket function */
962955c5 6313 s = pfn_socket (af, type, protocol);
177c0ea7 6314
480b0c5b 6315 if (s != INVALID_SOCKET)
f277993b 6316 return socket_to_fd (s);
480b0c5b 6317
962955c5
JR		 6318 set_errno ();
6319 return -1;
6320}
6321
6322/* Convert a SOCKET to a file descriptor. */
bedf4aab 6323static int
962955c5
JR		 6324socket_to_fd (SOCKET s)
6325{
6326 int fd;
6327 child_process * cp;
6328
6329 /* Although under NT 3.5 _open_osfhandle will accept a socket
6330 handle, if opened with SO_OPENTYPE == SO_SYNCHRONOUS_NONALERT,
6331 that does not work under NT 3.1. However, we can get the same
6332 effect by using a backdoor function to replace an existing
6333 descriptor handle with the one we want. */
6334
6335 /* allocate a file descriptor (with appropriate flags) */
6336 fd = _open ("NUL:", _O_RDWR);
6337 if (fd >= 0)
6338 {
962955c5
JR		 6339 /* Make a non-inheritable copy of the socket handle. Note
6340 that it is possible that sockets aren't actually kernel
6341 handles, which appears to be the case on Windows 9x when
6342 the MS Proxy winsock client is installed. */
6343 {
6344 /* Apparently there is a bug in NT 3.51 with some service
6345 packs, which prevents using DuplicateHandle to make a
6346 socket handle non-inheritable (causes WSACleanup to
6347 hang). The work-around is to use SetHandleInformation
6348 instead if it is available and implemented. */
6349 if (pfn_SetHandleInformation)
480b0c5b 6350 {
962955c5
JR		 6351 pfn_SetHandleInformation ((HANDLE) s, HANDLE_FLAG_INHERIT, 0);
6352 }
6353 else
6354 {
6355 HANDLE parent = GetCurrentProcess ();
6356 HANDLE new_s = INVALID_HANDLE_VALUE;
6357
6358 if (DuplicateHandle (parent,
6359 (HANDLE) s,
6360 parent,
6361 &new_s,
6362 0,
6363 FALSE,
6364 DUPLICATE_SAME_ACCESS))
f1614061 6365 {
962955c5
JR		 6366 /* It is possible that DuplicateHandle succeeds even
6367 though the socket wasn't really a kernel handle,
6368 because a real handle has the same value. So
6369 test whether the new handle really is a socket. */
6370 long nonblocking = 0;
6371 if (pfn_ioctlsocket ((SOCKET) new_s, FIONBIO, &nonblocking) == 0)
ca149beb 6372 {
962955c5
JR		 6373 pfn_closesocket (s);
6374 s = (SOCKET) new_s;
6375 }
6376 else
6377 {
6378 CloseHandle (new_s);
6379 }
177c0ea7 6380 }
480b0c5b 6381 }
962955c5 6382 }
bcf7fe2a 6383 eassert (fd < MAXDESC);
962955c5 6384 fd_info[fd].hnd = (HANDLE) s;
480b0c5b 6385
962955c5
JR		 6386 /* set our own internal flags */
6387 fd_info[fd].flags = FILE_SOCKET | FILE_BINARY | FILE_READ | FILE_WRITE;
480b0c5b 6388
962955c5
JR		 6389 cp = new_child ();
6390 if (cp)
6391 {
6392 cp->fd = fd;
6393 cp->status = STATUS_READ_ACKNOWLEDGED;
480b0c5b 6394
962955c5
JR		 6395 /* attach child_process to fd_info */
6396 if (fd_info[ fd ].cp != NULL)
6397 {
6398 DebPrint (("sys_socket: fd_info[%d] apparently in use!\n", fd));
1088b922 6399 emacs_abort ();
480b0c5b
GV		 6400 }
6401
962955c5
JR		 6402 fd_info[ fd ].cp = cp;
6403
6404 /* success! */
6405 winsock_inuse++; /* count open sockets */
6406 return fd;
480b0c5b 6407 }
480b0c5b 6408
962955c5
JR		 6409 /* clean up */
6410 _close (fd);
6411 }
f277993b 6412 else
962955c5 6413 pfn_closesocket (s);
f277993b 6414 errno = EMFILE;
480b0c5b
GV		 6415 return -1;
6416}
6417
480b0c5b
GV		 6418int
6419sys_bind (int s, const struct sockaddr * addr, int namelen)
6420{
f249a012 6421 if (winsock_lib == NULL)
480b0c5b 6422 {
f277993b 6423 errno = ENOTSOCK;
480b0c5b
GV		 6424 return SOCKET_ERROR;
6425 }
6426
6427 check_errno ();
6428 if (fd_info[s].flags & FILE_SOCKET)
6429 {
6430 int rc = pfn_bind (SOCK_HANDLE (s), addr, namelen);
6431 if (rc == SOCKET_ERROR)
6432 set_errno ();
6433 return rc;
6434 }
f277993b 6435 errno = ENOTSOCK;
480b0c5b
GV		 6436 return SOCKET_ERROR;
6437}
6438
480b0c5b
GV		 6439int
6440sys_connect (int s, const struct sockaddr * name, int namelen)
6441{
f249a012 6442 if (winsock_lib == NULL)
480b0c5b 6443 {
f277993b 6444 errno = ENOTSOCK;
480b0c5b
GV		 6445 return SOCKET_ERROR;
6446 }
6447
6448 check_errno ();
6449 if (fd_info[s].flags & FILE_SOCKET)
6450 {
6451 int rc = pfn_connect (SOCK_HANDLE (s), name, namelen);
6452 if (rc == SOCKET_ERROR)
6453 set_errno ();
6454 return rc;
6455 }
f277993b 6456 errno = ENOTSOCK;
480b0c5b
GV		 6457 return SOCKET_ERROR;
6458}
6459
6460u_short
6461sys_htons (u_short hostshort)
6462{
f249a012 6463 return (winsock_lib != NULL) ?
480b0c5b
GV		 6464 pfn_htons (hostshort) : hostshort;
6465}
6466
6467u_short
6468sys_ntohs (u_short netshort)
6469{
f249a012 6470 return (winsock_lib != NULL) ?
480b0c5b
GV		 6471 pfn_ntohs (netshort) : netshort;
6472}
6473
6474unsigned long
6475sys_inet_addr (const char * cp)
6476{
f249a012 6477 return (winsock_lib != NULL) ?
480b0c5b
GV		 6478 pfn_inet_addr (cp) : INADDR_NONE;
6479}
6480
6481int
6482sys_gethostname (char * name, int namelen)
6483{
f249a012 6484 if (winsock_lib != NULL)
f277993b
EZ		 6485 {
6486 int retval;
6487
6488 check_errno ();
6489 retval = pfn_gethostname (name, namelen);
6490 if (retval == SOCKET_ERROR)
6491 set_errno ();
6492 return retval;
6493 }
480b0c5b
GV		 6494
6495 if (namelen > MAX_COMPUTERNAME_LENGTH)
a302c7ae 6496 return !GetComputerName (name, (DWORD *)&namelen);
480b0c5b 6497
f277993b 6498 errno = EFAULT;
480b0c5b
GV		 6499 return SOCKET_ERROR;
6500}
6501
6502struct hostent *
ed3751c8 6503sys_gethostbyname (const char * name)
480b0c5b
GV		 6504{
6505 struct hostent * host;
f277993b 6506 int h_err = h_errno;
480b0c5b 6507
f249a012 6508 if (winsock_lib == NULL)
480b0c5b 6509 {
f277993b
EZ		 6510 h_errno = NO_RECOVERY;
6511 errno = ENETDOWN;
480b0c5b
GV		 6512 return NULL;
6513 }
6514
6515 check_errno ();
6516 host = pfn_gethostbyname (name);
6517 if (!host)
f277993b
EZ		 6518 {
6519 set_errno ();
6520 h_errno = errno;
6521 }
6522 else
6523 h_errno = h_err;
480b0c5b
GV		 6524 return host;
6525}
6526
6527struct servent *
ed3751c8 6528sys_getservbyname (const char * name, const char * proto)
480b0c5b
GV		 6529{
6530 struct servent * serv;
6531
f249a012 6532 if (winsock_lib == NULL)
480b0c5b 6533 {
f277993b 6534 errno = ENETDOWN;
480b0c5b
GV		 6535 return NULL;
6536 }
6537
6538 check_errno ();
6539 serv = pfn_getservbyname (name, proto);
6540 if (!serv)
6541 set_errno ();
6542 return serv;
6543}
6544
ecd270eb
JR		 6545int
6546sys_getpeername (int s, struct sockaddr *addr, int * namelen)
6547{
6548 if (winsock_lib == NULL)
6549 {
f277993b 6550 errno = ENETDOWN;
ecd270eb
JR		 6551 return SOCKET_ERROR;
6552 }
6553
6554 check_errno ();
6555 if (fd_info[s].flags & FILE_SOCKET)
6556 {
6557 int rc = pfn_getpeername (SOCK_HANDLE (s), addr, namelen);
6558 if (rc == SOCKET_ERROR)
6559 set_errno ();
6560 return rc;
6561 }
f277993b 6562 errno = ENOTSOCK;
ecd270eb
JR		 6563 return SOCKET_ERROR;
6564}
6565
380961a6
GV		 6566int
6567sys_shutdown (int s, int how)
6568{
380961a6
GV		 6569 if (winsock_lib == NULL)
6570 {
f277993b 6571 errno = ENETDOWN;
380961a6
GV		 6572 return SOCKET_ERROR;
6573 }
6574
6575 check_errno ();
6576 if (fd_info[s].flags & FILE_SOCKET)
6577 {
6578 int rc = pfn_shutdown (SOCK_HANDLE (s), how);
962955c5
JR		 6579 if (rc == SOCKET_ERROR)
6580 set_errno ();
6581 return rc;
6582 }
f277993b 6583 errno = ENOTSOCK;
962955c5
JR		 6584 return SOCKET_ERROR;
6585}
6586
6587int
a5a389bb 6588sys_setsockopt (int s, int level, int optname, const void * optval, int optlen)
962955c5
JR		 6589{
6590 if (winsock_lib == NULL)
6591 {
f277993b 6592 errno = ENETDOWN;
962955c5
JR		 6593 return SOCKET_ERROR;
6594 }
6595
6596 check_errno ();
6597 if (fd_info[s].flags & FILE_SOCKET)
6598 {
6599 int rc = pfn_setsockopt (SOCK_HANDLE (s), level, optname,
a5a389bb 6600 (const char *)optval, optlen);
962955c5
JR		 6601 if (rc == SOCKET_ERROR)
6602 set_errno ();
6603 return rc;
6604 }
f277993b 6605 errno = ENOTSOCK;
177c0ea7 6606 return SOCKET_ERROR;
962955c5
JR		 6607}
6608
6609int
6610sys_listen (int s, int backlog)
6611{
6612 if (winsock_lib == NULL)
6613 {
f277993b 6614 errno = ENETDOWN;
962955c5
JR		 6615 return SOCKET_ERROR;
6616 }
6617
6618 check_errno ();
6619 if (fd_info[s].flags & FILE_SOCKET)
6620 {
6621 int rc = pfn_listen (SOCK_HANDLE (s), backlog);
6622 if (rc == SOCKET_ERROR)
6623 set_errno ();
26fb7bc4 6624 else
64570b36 6625 fd_info[s].flags |= FILE_LISTEN;
962955c5
JR		 6626 return rc;
6627 }
f277993b 6628 errno = ENOTSOCK;
177c0ea7 6629 return SOCKET_ERROR;
962955c5
JR		 6630}
6631
6632int
6633sys_getsockname (int s, struct sockaddr * name, int * namelen)
6634{
6635 if (winsock_lib == NULL)
6636 {
f277993b 6637 errno = ENETDOWN;
962955c5
JR		 6638 return SOCKET_ERROR;
6639 }
6640
6641 check_errno ();
6642 if (fd_info[s].flags & FILE_SOCKET)
6643 {
6644 int rc = pfn_getsockname (SOCK_HANDLE (s), name, namelen);
6645 if (rc == SOCKET_ERROR)
6646 set_errno ();
6647 return rc;
6648 }
f277993b 6649 errno = ENOTSOCK;
177c0ea7 6650 return SOCKET_ERROR;
962955c5
JR		 6651}
6652
6653int
6654sys_accept (int s, struct sockaddr * addr, int * addrlen)
6655{
6656 if (winsock_lib == NULL)
6657 {
f277993b 6658 errno = ENETDOWN;
962955c5
JR		 6659 return -1;
6660 }
6661
6662 check_errno ();
26fb7bc4 6663 if (fd_info[s].flags & FILE_LISTEN)
962955c5 6664 {
a0ad1860 6665 SOCKET t = pfn_accept (SOCK_HANDLE (s), addr, addrlen);
64570b36
KS		 6666 int fd = -1;
6667 if (t == INVALID_SOCKET)
6668 set_errno ();
6669 else
f277993b 6670 fd = socket_to_fd (t);
962955c5 6671
bcf7fe2a
EZ		 6672 if (fd >= 0)
6673 {
6674 fd_info[s].cp->status = STATUS_READ_ACKNOWLEDGED;
6675 ResetEvent (fd_info[s].cp->char_avail);
6676 }
64570b36 6677 return fd;
962955c5 6678 }
f277993b 6679 errno = ENOTSOCK;
962955c5
JR		 6680 return -1;
6681}
6682
6683int
6684sys_recvfrom (int s, char * buf, int len, int flags,
b56ceb92 6685 struct sockaddr * from, int * fromlen)
962955c5
JR		 6686{
6687 if (winsock_lib == NULL)
6688 {
f277993b 6689 errno = ENETDOWN;
962955c5
JR		 6690 return SOCKET_ERROR;
6691 }
6692
6693 check_errno ();
6694 if (fd_info[s].flags & FILE_SOCKET)
6695 {
6696 int rc = pfn_recvfrom (SOCK_HANDLE (s), buf, len, flags, from, fromlen);
6697 if (rc == SOCKET_ERROR)
6698 set_errno ();
6699 return rc;
6700 }
f277993b 6701 errno = ENOTSOCK;
962955c5
JR		 6702 return SOCKET_ERROR;
6703}
6704
6705int
6706sys_sendto (int s, const char * buf, int len, int flags,
6707 const struct sockaddr * to, int tolen)
6708{
6709 if (winsock_lib == NULL)
6710 {
f277993b 6711 errno = ENETDOWN;
962955c5
JR		 6712 return SOCKET_ERROR;
6713 }
6714
6715 check_errno ();
6716 if (fd_info[s].flags & FILE_SOCKET)
6717 {
6718 int rc = pfn_sendto (SOCK_HANDLE (s), buf, len, flags, to, tolen);
380961a6
GV		 6719 if (rc == SOCKET_ERROR)
6720 set_errno ();
6721 return rc;
6722 }
f277993b 6723 errno = ENOTSOCK;
380961a6
GV		 6724 return SOCKET_ERROR;
6725}
6726
ecd270eb
JR		 6727/* Windows does not have an fcntl function. Provide an implementation
6728 solely for making sockets non-blocking. */
6729int
6730fcntl (int s, int cmd, int options)
6731{
6732 if (winsock_lib == NULL)
6733 {
f277993b 6734 errno = ENETDOWN;
ecd270eb
JR		 6735 return -1;
6736 }
6737
6738 check_errno ();
6739 if (fd_info[s].flags & FILE_SOCKET)
6740 {
49cdacda 6741 if (cmd == F_SETFL && options == O_NONBLOCK)
ecd270eb
JR		 6742 {
6743 unsigned long nblock = 1;
6744 int rc = pfn_ioctlsocket (SOCK_HANDLE (s), FIONBIO, &nblock);
6745 if (rc == SOCKET_ERROR)
9d4f32e8 6746 set_errno ();
ecd270eb
JR		 6747 /* Keep track of the fact that we set this to non-blocking. */
6748 fd_info[s].flags |= FILE_NDELAY;
6749 return rc;
6750 }
6751 else
6752 {
f277993b 6753 errno = EINVAL;
ecd270eb
JR		 6754 return SOCKET_ERROR;
6755 }
6756 }
f277993b 6757 errno = ENOTSOCK;
ecd270eb
JR		 6758 return SOCKET_ERROR;
6759}
6760
480b0c5b
GV		 6761
6762/* Shadow main io functions: we need to handle pipes and sockets more
6763 intelligently, and implement non-blocking mode as well. */
6764
6765int
6766sys_close (int fd)
6767{
6768 int rc;
6769
7559f399 6770 if (fd < 0)
480b0c5b
GV		 6771 {
6772 errno = EBADF;
6773 return -1;
6774 }
6775
7559f399 6776 if (fd < MAXDESC && fd_info[fd].cp)
480b0c5b
GV		 6777 {
6778 child_process * cp = fd_info[fd].cp;
6779
6780 fd_info[fd].cp = NULL;
6781
6782 if (CHILD_ACTIVE (cp))
6783 {
6784 /* if last descriptor to active child_process then cleanup */
6785 int i;
6786 for (i = 0; i < MAXDESC; i++)
6787 {
6788 if (i == fd)
6789 continue;
6790 if (fd_info[i].cp == cp)
6791 break;
6792 }
6793 if (i == MAXDESC)
6794 {
480b0c5b
GV		 6795 if (fd_info[fd].flags & FILE_SOCKET)
6796 {
1088b922 6797 if (winsock_lib == NULL) emacs_abort ();
480b0c5b
GV		 6798
6799 pfn_shutdown (SOCK_HANDLE (fd), 2);
6800 rc = pfn_closesocket (SOCK_HANDLE (fd));
7d701334 6801
f249a012 6802 winsock_inuse--; /* count open sockets */
480b0c5b 6803 }
299614f3
EZ		 6804 /* If the process handle is NULL, it's either a socket
6805 or serial connection, or a subprocess that was
6806 already reaped by reap_subprocess, but whose
6807 resources were not yet freed, because its output was
6808 not fully read yet by the time it was reaped. (This
6809 usually happens with async subprocesses whose output
6810 is being read by Emacs.) Otherwise, this process was
6811 not reaped yet, so we set its FD to a negative value
6812 to make sure sys_select will eventually get to
6813 calling the SIGCHLD handler for it, which will then
6814 invoke waitpid and reap_subprocess. */
6815 if (cp->procinfo.hProcess == NULL)
6816 delete_child (cp);
6817 else
6818 cp->fd = -1;
480b0c5b
GV		 6819 }
6820 }
6821 }
6822
224f4ec1
EZ		 6823 if (fd >= 0 && fd < MAXDESC)
6824 fd_info[fd].flags = 0;
6825
480b0c5b 6826 /* Note that sockets do not need special treatment here (at least on
e9e23e23 6827 NT and Windows 95 using the standard tcp/ip stacks) - it appears that
480b0c5b
GV		 6828 closesocket is equivalent to CloseHandle, which is to be expected
6829 because socket handles are fully fledged kernel handles. */
6830 rc = _close (fd);
6831
480b0c5b
GV		 6832 return rc;
6833}
6834
6835int
6836sys_dup (int fd)
6837{
6838 int new_fd;
6839
6840 new_fd = _dup (fd);
7559f399 6841 if (new_fd >= 0 && new_fd < MAXDESC)
480b0c5b
GV		 6842 {
6843 /* duplicate our internal info as well */
6844 fd_info[new_fd] = fd_info[fd];
6845 }
6846 return new_fd;
6847}
6848
480b0c5b
GV		 6849int
6850sys_dup2 (int src, int dst)
6851{
6852 int rc;
6853
6854 if (dst < 0 || dst >= MAXDESC)
6855 {
6856 errno = EBADF;
6857 return -1;
6858 }
6859
6860 /* make sure we close the destination first if it's a pipe or socket */
6861 if (src != dst && fd_info[dst].flags != 0)
6862 sys_close (dst);
177c0ea7 6863
480b0c5b
GV		 6864 rc = _dup2 (src, dst);
6865 if (rc == 0)
6866 {
6867 /* duplicate our internal info as well */
6868 fd_info[dst] = fd_info[src];
6869 }
6870 return rc;
6871}
6872
480b0c5b
GV		 6873/* Unix pipe() has only one arg */
6874int
6875sys_pipe (int * phandles)
6876{
6877 int rc;
6878 unsigned flags;
480b0c5b 6879
76b3903d
GV		 6880 /* make pipe handles non-inheritable; when we spawn a child, we
6881 replace the relevant handle with an inheritable one. Also put
6882 pipes into binary mode; we will do text mode translation ourselves
6883 if required. */
6884 rc = _pipe (phandles, 0, _O_NOINHERIT | _O_BINARY);
480b0c5b
GV		 6885
6886 if (rc == 0)
6887 {
cb72110d
JR		 6888 /* Protect against overflow, since Windows can open more handles than
6889 our fd_info array has room for. */
6890 if (phandles[0] >= MAXDESC || phandles[1] >= MAXDESC)
6891 {
6892 _close (phandles[0]);
6893 _close (phandles[1]);
6e432f0c 6894 errno = EMFILE;
cb72110d
JR		 6895 rc = -1;
6896 }
6897 else
6898 {
6899 flags = FILE_PIPE | FILE_READ | FILE_BINARY;
6900 fd_info[phandles[0]].flags = flags;
480b0c5b 6901
cb72110d
JR		 6902 flags = FILE_PIPE | FILE_WRITE | FILE_BINARY;
6903 fd_info[phandles[1]].flags = flags;
6904 }
480b0c5b
GV		 6905 }
6906
6907 return rc;
6908}
6909
6910/* Function to do blocking read of one byte, needed to implement
d3d14b40
EZ		 6911 select. It is only allowed on communication ports, sockets, or
6912 pipes. */
480b0c5b
GV		 6913int
6914_sys_read_ahead (int fd)
6915{
6916 child_process * cp;
6917 int rc;
6918
6919 if (fd < 0 || fd >= MAXDESC)
6920 return STATUS_READ_ERROR;
6921
6922 cp = fd_info[fd].cp;
6923
6924 if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY)
6925 return STATUS_READ_ERROR;
6926
d888760c 6927 if ((fd_info[fd].flags & (FILE_PIPE | FILE_SERIAL | FILE_SOCKET)) == 0
480b0c5b
GV		 6928 || (fd_info[fd].flags & FILE_READ) == 0)
6929 {
d888760c 6930 DebPrint (("_sys_read_ahead: internal error: fd %d is not a pipe, serial port, or socket!\n", fd));
1088b922 6931 emacs_abort ();
480b0c5b 6932 }
177c0ea7 6933
480b0c5b 6934 cp->status = STATUS_READ_IN_PROGRESS;
177c0ea7 6935
480b0c5b 6936 if (fd_info[fd].flags & FILE_PIPE)
f7554349 6937 {
f7554349
KH		 6938 rc = _read (fd, &cp->chr, sizeof (char));
6939
6940 /* Give subprocess time to buffer some more output for us before
e9e23e23 6941 reporting that input is available; we need this because Windows 95
f7554349
KH		 6942 connects DOS programs to pipes by making the pipe appear to be
6943 the normal console stdout - as a result most DOS programs will
d888760c 6944 write to stdout without buffering, ie. one character at a
fbd6baed 6945 time. Even some W32 programs do this - "dir" in a command
f7554349
KH		 6946 shell on NT is very slow if we don't do this. */
6947 if (rc > 0)
6948 {
78806724 6949 int wait = w32_pipe_read_delay;
f7554349
KH		 6950
6951 if (wait > 0)
6952 Sleep (wait);
6953 else if (wait < 0)
6954 while (++wait <= 0)
6955 /* Yield remainder of our time slice, effectively giving a
6956 temporary priority boost to the child process. */
6957 Sleep (0);
6958 }
6959 }
d888760c
GM		 6960 else if (fd_info[fd].flags & FILE_SERIAL)
6961 {
6962 HANDLE hnd = fd_info[fd].hnd;
6963 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_read;
6964 COMMTIMEOUTS ct;
6965
6966 /* Configure timeouts for blocking read. */
6967 if (!GetCommTimeouts (hnd, &ct))
6e432f0c
EZ		 6968 {
6969 cp->status = STATUS_READ_ERROR;
6970 return STATUS_READ_ERROR;
6971 }
d888760c
GM		 6972 ct.ReadIntervalTimeout = 0;
6973 ct.ReadTotalTimeoutMultiplier = 0;
6974 ct.ReadTotalTimeoutConstant = 0;
6975 if (!SetCommTimeouts (hnd, &ct))
6e432f0c
EZ		 6976 {
6977 cp->status = STATUS_READ_ERROR;
6978 return STATUS_READ_ERROR;
6979 }
d888760c
GM		 6980
6981 if (!ReadFile (hnd, &cp->chr, sizeof (char), (DWORD*) &rc, ovl))
6982 {
6983 if (GetLastError () != ERROR_IO_PENDING)
6e432f0c
EZ		 6984 {
6985 cp->status = STATUS_READ_ERROR;
6986 return STATUS_READ_ERROR;
6987 }
d888760c 6988 if (!GetOverlappedResult (hnd, ovl, (DWORD*) &rc, TRUE))
6e432f0c
EZ		 6989 {
6990 cp->status = STATUS_READ_ERROR;
6991 return STATUS_READ_ERROR;
6992 }
d888760c
GM		 6993 }
6994 }
480b0c5b 6995 else if (fd_info[fd].flags & FILE_SOCKET)
ecd270eb
JR		 6996 {
6997 unsigned long nblock = 0;
6998 /* We always want this to block, so temporarily disable NDELAY. */
6999 if (fd_info[fd].flags & FILE_NDELAY)
7000 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
7001
7002 rc = pfn_recv (SOCK_HANDLE (fd), &cp->chr, sizeof (char), 0);
7003
7004 if (fd_info[fd].flags & FILE_NDELAY)
7005 {
7006 nblock = 1;
7007 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
7008 }
7009 }
177c0ea7 7010
480b0c5b
GV		 7011 if (rc == sizeof (char))
7012 cp->status = STATUS_READ_SUCCEEDED;
7013 else
7014 cp->status = STATUS_READ_FAILED;
7015
7016 return cp->status;
7017}
7018
9bfb11f9
KS		 7019int
7020_sys_wait_accept (int fd)
64570b36
KS		 7021{
7022 HANDLE hEv;
7023 child_process * cp;
7024 int rc;
7025
7026 if (fd < 0 || fd >= MAXDESC)
7027 return STATUS_READ_ERROR;
7028
7029 cp = fd_info[fd].cp;
7030
7031 if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY)
7032 return STATUS_READ_ERROR;
7033
7034 cp->status = STATUS_READ_FAILED;
7035
7036 hEv = pfn_WSACreateEvent ();
7037 rc = pfn_WSAEventSelect (SOCK_HANDLE (fd), hEv, FD_ACCEPT);
7038 if (rc != SOCKET_ERROR)
7039 {
7040 rc = WaitForSingleObject (hEv, INFINITE);
7041 pfn_WSAEventSelect (SOCK_HANDLE (fd), NULL, 0);
64570b36
KS		 7042 if (rc == WAIT_OBJECT_0)
7043 cp->status = STATUS_READ_SUCCEEDED;
7044 }
7046f191 7045 pfn_WSACloseEvent (hEv);
64570b36
KS		 7046
7047 return cp->status;
7048}
7049
480b0c5b
GV		 7050int
7051sys_read (int fd, char * buffer, unsigned int count)
7052{
7053 int nchars;
480b0c5b
GV		 7054 int to_read;
7055 DWORD waiting;
76b3903d 7056 char * orig_buffer = buffer;
480b0c5b 7057
7559f399 7058 if (fd < 0)
480b0c5b
GV		 7059 {
7060 errno = EBADF;
7061 return -1;
7062 }
7063
d888760c 7064 if (fd < MAXDESC && fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET | FILE_SERIAL))
480b0c5b
GV		 7065 {
7066 child_process *cp = fd_info[fd].cp;
7067
7068 if ((fd_info[fd].flags & FILE_READ) == 0)
7069 {
7070 errno = EBADF;
7071 return -1;
7072 }
7073
76b3903d
GV		 7074 nchars = 0;
7075
7076 /* re-read CR carried over from last read */
7077 if (fd_info[fd].flags & FILE_LAST_CR)
7078 {
1088b922 7079 if (fd_info[fd].flags & FILE_BINARY) emacs_abort ();
76b3903d
GV		 7080 *buffer++ = 0x0d;
7081 count--;
7082 nchars++;
f52eb3ef 7083 fd_info[fd].flags &= ~FILE_LAST_CR;
76b3903d
GV		 7084 }
7085
480b0c5b
GV		 7086 /* presence of a child_process structure means we are operating in
7087 non-blocking mode - otherwise we just call _read directly.
7088 Note that the child_process structure might be missing because
7089 reap_subprocess has been called; in this case the pipe is
7090 already broken, so calling _read on it is okay. */
7091 if (cp)
7092 {
7093 int current_status = cp->status;
7094
7095 switch (current_status)
7096 {
7097 case STATUS_READ_FAILED:
7098 case STATUS_READ_ERROR:
f52eb3ef
GV		 7099 /* report normal EOF if nothing in buffer */
7100 if (nchars <= 0)
7101 fd_info[fd].flags |= FILE_AT_EOF;
7102 return nchars;
480b0c5b
GV		 7103
7104 case STATUS_READ_READY:
7105 case STATUS_READ_IN_PROGRESS:
7106 DebPrint (("sys_read called when read is in progress\n"));
7107 errno = EWOULDBLOCK;
7108 return -1;
7109
7110 case STATUS_READ_SUCCEEDED:
7111 /* consume read-ahead char */
7112 *buffer++ = cp->chr;
7113 count--;
76b3903d 7114 nchars++;
480b0c5b
GV		 7115 cp->status = STATUS_READ_ACKNOWLEDGED;
7116 ResetEvent (cp->char_avail);
7117
7118 case STATUS_READ_ACKNOWLEDGED:
7119 break;
7120
7121 default:
7122 DebPrint (("sys_read: bad status %d\n", current_status));
7123 errno = EBADF;
7124 return -1;
7125 }
7126
7127 if (fd_info[fd].flags & FILE_PIPE)
7128 {
7129 PeekNamedPipe ((HANDLE) _get_osfhandle (fd), NULL, 0, NULL, &waiting, NULL);
7130 to_read = min (waiting, (DWORD) count);
f52eb3ef
GV		 7131
7132 if (to_read > 0)
7133 nchars += _read (fd, buffer, to_read);
480b0c5b 7134 }
d888760c
GM		 7135 else if (fd_info[fd].flags & FILE_SERIAL)
7136 {
7137 HANDLE hnd = fd_info[fd].hnd;
7138 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_read;
d888760c
GM		 7139 int rc = 0;
7140 COMMTIMEOUTS ct;
7141
7142 if (count > 0)
7143 {
7144 /* Configure timeouts for non-blocking read. */
7145 if (!GetCommTimeouts (hnd, &ct))
7146 {
7147 errno = EIO;
7148 return -1;
7149 }
7150 ct.ReadIntervalTimeout = MAXDWORD;
7151 ct.ReadTotalTimeoutMultiplier = 0;
7152 ct.ReadTotalTimeoutConstant = 0;
7153 if (!SetCommTimeouts (hnd, &ct))
7154 {
7155 errno = EIO;
7156 return -1;
7157 }
7158
7159 if (!ResetEvent (ovl->hEvent))
7160 {
7161 errno = EIO;
7162 return -1;
7163 }
7164 if (!ReadFile (hnd, buffer, count, (DWORD*) &rc, ovl))
7165 {
7166 if (GetLastError () != ERROR_IO_PENDING)
7167 {
7168 errno = EIO;
7169 return -1;
7170 }
7171 if (!GetOverlappedResult (hnd, ovl, (DWORD*) &rc, TRUE))
7172 {
7173 errno = EIO;
7174 return -1;
7175 }
7176 }
7177 nchars += rc;
7178 }
7179 }
480b0c5b
GV		 7180 else /* FILE_SOCKET */
7181 {
1088b922 7182 if (winsock_lib == NULL) emacs_abort ();
480b0c5b
GV		 7183
7184 /* do the equivalent of a non-blocking read */
7185 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONREAD, &waiting);
76b3903d 7186 if (waiting == 0 && nchars == 0)
480b0c5b 7187 {
f277993b 7188 errno = EWOULDBLOCK;
480b0c5b
GV		 7189 return -1;
7190 }
7191
480b0c5b
GV		 7192 if (waiting)
7193 {
7194 /* always use binary mode for sockets */
76b3903d
GV		 7195 int res = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0);
7196 if (res == SOCKET_ERROR)
480b0c5b 7197 {
ed3751c8
JB		 7198 DebPrint (("sys_read.recv failed with error %d on socket %ld\n",
7199 pfn_WSAGetLastError (), SOCK_HANDLE (fd)));
76b3903d
GV		 7200 set_errno ();
7201 return -1;
480b0c5b 7202 }
76b3903d 7203 nchars += res;
480b0c5b
GV		 7204 }
7205 }
480b0c5b
GV		 7206 }
7207 else
f52eb3ef
GV		 7208 {
7209 int nread = _read (fd, buffer, count);
7210 if (nread >= 0)
7211 nchars += nread;
7212 else if (nchars == 0)
7213 nchars = nread;
7214 }
76b3903d 7215
f52eb3ef
GV		 7216 if (nchars <= 0)
7217 fd_info[fd].flags |= FILE_AT_EOF;
76b3903d 7218 /* Perform text mode translation if required. */
f52eb3ef 7219 else if ((fd_info[fd].flags & FILE_BINARY) == 0)
76b3903d
GV		 7220 {
7221 nchars = crlf_to_lf (nchars, orig_buffer);
7222 /* If buffer contains only CR, return that. To be absolutely
7223 sure we should attempt to read the next char, but in
7224 practice a CR to be followed by LF would not appear by
7225 itself in the buffer. */
7226 if (nchars > 1 && orig_buffer[nchars - 1] == 0x0d)
7227 {
7228 fd_info[fd].flags |= FILE_LAST_CR;
7229 nchars--;
7230 }
76b3903d 7231 }
480b0c5b
GV		 7232 }
7233 else
7234 nchars = _read (fd, buffer, count);
7235
76b3903d 7236 return nchars;
480b0c5b
GV		 7237}
7238
d888760c
GM		 7239/* From w32xfns.c */
7240extern HANDLE interrupt_handle;
7241
480b0c5b
GV		 7242/* For now, don't bother with a non-blocking mode */
7243int
7244sys_write (int fd, const void * buffer, unsigned int count)
7245{
7246 int nchars;
7247
7559f399 7248 if (fd < 0)
480b0c5b
GV		 7249 {
7250 errno = EBADF;
7251 return -1;
7252 }
7253
d888760c 7254 if (fd < MAXDESC && fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET | FILE_SERIAL))
76b3903d
GV		 7255 {
7256 if ((fd_info[fd].flags & FILE_WRITE) == 0)
7257 {
7258 errno = EBADF;
7259 return -1;
7260 }
7261
7262 /* Perform text mode translation if required. */
7263 if ((fd_info[fd].flags & FILE_BINARY) == 0)
7264 {
7265 char * tmpbuf = alloca (count * 2);
7266 unsigned char * src = (void *)buffer;
7267 unsigned char * dst = tmpbuf;
7268 int nbytes = count;
7269
7270 while (1)
7271 {
7272 unsigned char *next;
7273 /* copy next line or remaining bytes */
7274 next = _memccpy (dst, src, '\n', nbytes);
7275 if (next)
7276 {
7277 /* copied one line ending with '\n' */
7278 int copied = next - dst;
7279 nbytes -= copied;
7280 src += copied;
7281 /* insert '\r' before '\n' */
7282 next[-1] = '\r';
7283 next[0] = '\n';
7284 dst = next + 1;
7285 count++;
177c0ea7 7286 }
76b3903d
GV		 7287 else
7288 /* copied remaining partial line -> now finished */
7289 break;
7290 }
7291 buffer = tmpbuf;
7292 }
7293 }
7294
d888760c
GM		 7295 if (fd < MAXDESC && fd_info[fd].flags & FILE_SERIAL)
7296 {
7297 HANDLE hnd = (HANDLE) _get_osfhandle (fd);
7298 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_write;
7299 HANDLE wait_hnd[2] = { interrupt_handle, ovl->hEvent };
7300 DWORD active = 0;
7301
7302 if (!WriteFile (hnd, buffer, count, (DWORD*) &nchars, ovl))
7303 {
7304 if (GetLastError () != ERROR_IO_PENDING)
7305 {
7306 errno = EIO;
7307 return -1;
7308 }
7309 if (detect_input_pending ())
7310 active = MsgWaitForMultipleObjects (2, wait_hnd, FALSE, INFINITE,
7311 QS_ALLINPUT);
7312 else
7313 active = WaitForMultipleObjects (2, wait_hnd, FALSE, INFINITE);
7314 if (active == WAIT_OBJECT_0)
7315 { /* User pressed C-g, cancel write, then leave. Don't bother
7316 cleaning up as we may only get stuck in buggy drivers. */
7317 PurgeComm (hnd, PURGE_TXABORT | PURGE_TXCLEAR);
7318 CancelIo (hnd);
7319 errno = EIO;
7320 return -1;
7321 }
7322 if (active == WAIT_OBJECT_0 + 1
7323 && !GetOverlappedResult (hnd, ovl, (DWORD*) &nchars, TRUE))
7324 {
7325 errno = EIO;
7326 return -1;
7327 }
7328 }
7329 }
7d701334 7330 else if (fd < MAXDESC && fd_info[fd].flags & FILE_SOCKET)
480b0c5b 7331 {
30a32e0e 7332 unsigned long nblock = 0;
1088b922 7333 if (winsock_lib == NULL) emacs_abort ();
30a32e0e
JR		 7334
7335 /* TODO: implement select() properly so non-blocking I/O works. */
7336 /* For now, make sure the write blocks. */
7337 if (fd_info[fd].flags & FILE_NDELAY)
7338 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
7339
480b0c5b 7340 nchars = pfn_send (SOCK_HANDLE (fd), buffer, count, 0);
30a32e0e
JR		 7341
7342 /* Set the socket back to non-blocking if it was before,
7343 for other operations that support it. */
7344 if (fd_info[fd].flags & FILE_NDELAY)
7345 {
7346 nblock = 1;
7347 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
7348 }
7349
480b0c5b
GV		 7350 if (nchars == SOCKET_ERROR)
7351 {
ed3751c8
JB		 7352 DebPrint (("sys_write.send failed with error %d on socket %ld\n",
7353 pfn_WSAGetLastError (), SOCK_HANDLE (fd)));
480b0c5b
GV		 7354 set_errno ();
7355 }
7356 }
7357 else
6e83d800
EZ		 7358 {
7359 /* Some networked filesystems don't like too large writes, so
7360 break them into smaller chunks. See the Comments section of
7361 the MSDN documentation of WriteFile for details behind the
7362 choice of the value of CHUNK below. See also the thread
7363 http://thread.gmane.org/gmane.comp.version-control.git/145294
7364 in the git mailing list. */
7365 const unsigned char *p = buffer;
7366 const unsigned chunk = 30 * 1024 * 1024;
7367
7368 nchars = 0;
7369 while (count > 0)
7370 {
7371 unsigned this_chunk = count < chunk ? count : chunk;
7372 int n = _write (fd, p, this_chunk);
7373
7374 nchars += n;
7375 if (n < 0)
7376 {
7377 nchars = n;
7378 break;
7379 }
7380 else if (n < this_chunk)
7381 break;
7382 count -= n;
7383 p += n;
7384 }
7385 }
480b0c5b
GV		 7386
7387 return nchars;
7388}
7389
97a93095
EZ		 7390/* The Windows CRT functions are "optimized for speed", so they don't
7391 check for timezone and DST changes if they were last called less
7392 than 1 minute ago (see http://support.microsoft.com/kb/821231). So
7393 all Emacs features that repeatedly call time functions (e.g.,
7394 display-time) are in real danger of missing timezone and DST
7395 changes. Calling tzset before each localtime call fixes that. */
7396struct tm *
7397sys_localtime (const time_t *t)
7398{
7399 tzset ();
7400 return localtime (t);
7401}
7402
0898ca10
JB		 7403
7404\f
d07ff9db
CY		 7405/* Try loading LIBRARY_ID from the file(s) specified in
7406 Vdynamic_library_alist. If the library is loaded successfully,
7407 return the handle of the DLL, and record the filename in the
7408 property :loaded-from of LIBRARY_ID. If the library could not be
7409 found, or when it was already loaded (because the handle is not
7410 recorded anywhere, and so is lost after use), return NULL.
7411
7412 We could also save the handle in :loaded-from, but currently
7413 there's no use case for it. */
0898ca10 7414HMODULE
d07ff9db 7415w32_delayed_load (Lisp_Object library_id)
0898ca10
JB		 7416{
7417 HMODULE library_dll = NULL;
7418
7419 CHECK_SYMBOL (library_id);
7420
d07ff9db
CY		 7421 if (CONSP (Vdynamic_library_alist)
7422 && NILP (Fassq (library_id, Vlibrary_cache)))
0898ca10
JB		 7423 {
7424 Lisp_Object found = Qnil;
d07ff9db 7425 Lisp_Object dlls = Fassq (library_id, Vdynamic_library_alist);
0898ca10
JB		 7426
7427 if (CONSP (dlls))
7428 for (dlls = XCDR (dlls); CONSP (dlls); dlls = XCDR (dlls))
7429 {
7430 CHECK_STRING_CAR (dlls);
657d08d3 7431 if ((library_dll = LoadLibrary (SDATA (XCAR (dlls)))))
0898ca10 7432 {
2a8ce227
JB		 7433 char name[MAX_PATH];
7434 DWORD len;
7435
7436 len = GetModuleFileNameA (library_dll, name, sizeof (name));
7437 found = Fcons (XCAR (dlls),
7438 (len > 0)
7439 /* Possibly truncated */
7440 ? make_specified_string (name, -1, len, 1)
7441 : Qnil);
0898ca10
JB		 7442 break;
7443 }
7444 }
7445
7446 Fput (library_id, QCloaded_from, found);
7447 }
7448
7449 return library_dll;
7450}
7451
7452\f
76151e2c 7453void
b56ceb92 7454check_windows_init_file (void)
f52eb3ef 7455{
f52eb3ef
GV		 7456 /* A common indication that Emacs is not installed properly is when
7457 it cannot find the Windows installation file. If this file does
7458 not exist in the expected place, tell the user. */
7459
c7aa8333
EZ		 7460 if (!noninteractive && !inhibit_window_system
7461 /* Vload_path is not yet initialized when we are loading
7462 loadup.el. */
7463 && NILP (Vpurify_flag))
d54abccd 7464 {
d54abccd
GV		 7465 Lisp_Object init_file;
7466 int fd;
f52eb3ef 7467
d54abccd 7468 init_file = build_string ("term/w32-win");
76151e2c 7469 fd = openp (Vload_path, init_file, Fget_load_suffixes (), NULL, Qnil);
177c0ea7 7470 if (fd < 0)
d54abccd 7471 {
76151e2c 7472 Lisp_Object load_path_print = Fprin1_to_string (Vload_path, Qnil);
d5db4077
KR		 7473 char *init_file_name = SDATA (init_file);
7474 char *load_path = SDATA (load_path_print);
acc23b87
KS		 7475 char *buffer = alloca (1024
7476 + strlen (init_file_name)
7477 + strlen (load_path));
d54abccd 7478
177c0ea7 7479 sprintf (buffer,
d54abccd
GV		 7480 "The Emacs Windows initialization file \"%s.el\" "
7481 "could not be found in your Emacs installation. "
7482 "Emacs checked the following directories for this file:\n"
7483 "\n%s\n\n"
7484 "When Emacs cannot find this file, it usually means that it "
7485 "was not installed properly, or its distribution file was "
7486 "not unpacked properly.\nSee the README.W32 file in the "
7487 "top-level Emacs directory for more information.",
7488 init_file_name, load_path);
7489 MessageBox (NULL,
7490 buffer,
7491 "Emacs Abort Dialog",
7492 MB_OK | MB_ICONEXCLAMATION | MB_TASKMODAL);
1088b922 7493 /* Use the low-level system abort. */
d54abccd
GV		 7494 abort ();
7495 }
7496 else
7497 {
a302c7ae 7498 _close (fd);
d54abccd 7499 }
f52eb3ef 7500 }
f52eb3ef 7501}
480b0c5b
GV		 7502
7503void
16b22fef 7504term_ntproc (int ignored)
480b0c5b 7505{
16b22fef 7506 (void)ignored;
c06c382a
EZ		 7507
7508 term_timers ();
7509
480b0c5b
GV		 7510 /* shutdown the socket interface if necessary */
7511 term_winsock ();
52c7f9ee
JR		 7512
7513 term_w32select ();
480b0c5b
GV		 7514}
7515
7516void
16b22fef 7517init_ntproc (int dumping)
480b0c5b 7518{
c06c382a
EZ		 7519 sigset_t initial_mask = 0;
7520
e1dbe924 7521 /* Initialize the socket interface now if available and requested by
f249a012 7522 the user by defining PRELOAD_WINSOCK; otherwise loading will be
fbd6baed 7523 delayed until open-network-stream is called (w32-has-winsock can
f249a012
RS		 7524 also be used to dynamically load or reload winsock).
7525
7526 Conveniently, init_environment is called before us, so
7527 PRELOAD_WINSOCK can be set in the registry. */
7528
7529 /* Always initialize this correctly. */
7530 winsock_lib = NULL;
7531
7532 if (getenv ("PRELOAD_WINSOCK") != NULL)
7533 init_winsock (TRUE);
480b0c5b
GV		 7534
7535 /* Initial preparation for subprocess support: replace our standard
7536 handles with non-inheritable versions. */
7537 {
7538 HANDLE parent;
7539 HANDLE stdin_save = INVALID_HANDLE_VALUE;
7540 HANDLE stdout_save = INVALID_HANDLE_VALUE;
7541 HANDLE stderr_save = INVALID_HANDLE_VALUE;
7542
7543 parent = GetCurrentProcess ();
7544
7545 /* ignore errors when duplicating and closing; typically the
7546 handles will be invalid when running as a gui program. */
177c0ea7
JB		 7547 DuplicateHandle (parent,
7548 GetStdHandle (STD_INPUT_HANDLE),
480b0c5b 7549 parent,
177c0ea7
JB		 7550 &stdin_save,
7551 0,
7552 FALSE,
480b0c5b 7553 DUPLICATE_SAME_ACCESS);
177c0ea7 7554
480b0c5b
GV		 7555 DuplicateHandle (parent,
7556 GetStdHandle (STD_OUTPUT_HANDLE),
7557 parent,
7558 &stdout_save,
7559 0,
7560 FALSE,
7561 DUPLICATE_SAME_ACCESS);
177c0ea7 7562
480b0c5b
GV		 7563 DuplicateHandle (parent,
7564 GetStdHandle (STD_ERROR_HANDLE),
7565 parent,
7566 &stderr_save,
7567 0,
7568 FALSE,
7569 DUPLICATE_SAME_ACCESS);
177c0ea7 7570
480b0c5b
GV		 7571 fclose (stdin);
7572 fclose (stdout);
7573 fclose (stderr);
7574
7575 if (stdin_save != INVALID_HANDLE_VALUE)
62aba0d4 7576 _open_osfhandle ((intptr_t) stdin_save, O_TEXT);
480b0c5b 7577 else
76b3903d
GV		 7578 _open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY);
7579 _fdopen (0, "r");
480b0c5b
GV		 7580
7581 if (stdout_save != INVALID_HANDLE_VALUE)
62aba0d4 7582 _open_osfhandle ((intptr_t) stdout_save, O_TEXT);
480b0c5b 7583 else
76b3903d
GV		 7584 _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY);
7585 _fdopen (1, "w");
480b0c5b
GV		 7586
7587 if (stderr_save != INVALID_HANDLE_VALUE)
62aba0d4 7588 _open_osfhandle ((intptr_t) stderr_save, O_TEXT);
480b0c5b 7589 else
76b3903d
GV		 7590 _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY);
7591 _fdopen (2, "w");
480b0c5b
GV		 7592 }
7593
7594 /* unfortunately, atexit depends on implementation of malloc */
7595 /* atexit (term_ntproc); */
16b22fef 7596 if (!dumping)
c06c382a
EZ		 7597 {
7598 /* Make sure we start with all signals unblocked. */
7599 sigprocmask (SIG_SETMASK, &initial_mask, NULL);
7600 signal (SIGABRT, term_ntproc);
7601 }
7602 init_timers ();
76b3903d
GV		 7603
7604 /* determine which drives are fixed, for GetCachedVolumeInformation */
7605 {
7606 /* GetDriveType must have trailing backslash. */
7607 char drive[] = "A:\\";
7608
7609 /* Loop over all possible drive letters */
7610 while (*drive <= 'Z')
7611 {
7612 /* Record if this drive letter refers to a fixed drive. */
177c0ea7 7613 fixed_drives[DRIVE_INDEX (*drive)] =
76b3903d
GV		 7614 (GetDriveType (drive) == DRIVE_FIXED);
7615
7616 (*drive)++;
7617 }
a302c7ae
AI		 7618
7619 /* Reset the volume info cache. */
7620 volume_cache = NULL;
76b3903d 7621 }
480b0c5b
GV		 7622}
7623
a8c3a596
JR		 7624/*
7625 shutdown_handler ensures that buffers' autosave files are
7626 up to date when the user logs off, or the system shuts down.
7627*/
bedf4aab 7628static BOOL WINAPI
ed3751c8 7629shutdown_handler (DWORD type)
a8c3a596
JR		 7630{
7631 /* Ctrl-C and Ctrl-Break are already suppressed, so don't handle them. */
7632 if (type == CTRL_CLOSE_EVENT /* User closes console window. */
7633 || type == CTRL_LOGOFF_EVENT /* User logs off. */
7634 || type == CTRL_SHUTDOWN_EVENT) /* User shutsdown. */
7635 {
7636 /* Shut down cleanly, making sure autosave files are up to date. */
1882aa38 7637 shut_down_emacs (0, Qnil);
a8c3a596
JR		 7638 }
7639
7046f191 7640 /* Allow other handlers to handle this signal. */
a8c3a596
JR		 7641 return FALSE;
7642}
7643
9785d95b
BK		 7644/*
7645 globals_of_w32 is used to initialize those global variables that
7646 must always be initialized on startup even when the global variable
7647 initialized is non zero (see the function main in emacs.c).
7648*/
9bfb11f9 7649void
b56ceb92 7650globals_of_w32 (void)
9785d95b 7651{
74258518
JR		 7652 HMODULE kernel32 = GetModuleHandle ("kernel32.dll");
7653
7654 get_process_times_fn = (GetProcessTimes_Proc)
7655 GetProcAddress (kernel32, "GetProcessTimes");
7656
cd3520a4 7657 DEFSYM (QCloaded_from, ":loaded-from");
0898ca10 7658
9785d95b
BK		 7659 g_b_init_is_windows_9x = 0;
7660 g_b_init_open_process_token = 0;
7661 g_b_init_get_token_information = 0;
7662 g_b_init_lookup_account_sid = 0;
9d95a291
EZ		 7663 g_b_init_get_sid_sub_authority = 0;
7664 g_b_init_get_sid_sub_authority_count = 0;
6dad7178 7665 g_b_init_get_security_info = 0;
8aaaec6b
EZ		 7666 g_b_init_get_file_security = 0;
7667 g_b_init_get_security_descriptor_owner = 0;
7668 g_b_init_get_security_descriptor_group = 0;
7669 g_b_init_is_valid_sid = 0;
7c80d5ec
EZ		 7670 g_b_init_create_toolhelp32_snapshot = 0;
7671 g_b_init_process32_first = 0;
7672 g_b_init_process32_next = 0;
7673 g_b_init_open_thread_token = 0;
7674 g_b_init_impersonate_self = 0;
7675 g_b_init_revert_to_self = 0;
7676 g_b_init_get_process_memory_info = 0;
7677 g_b_init_get_process_working_set_size = 0;
7678 g_b_init_global_memory_status = 0;
7679 g_b_init_global_memory_status_ex = 0;
f8b35b24
EZ		 7680 g_b_init_equal_sid = 0;
7681 g_b_init_copy_sid = 0;
7682 g_b_init_get_length_sid = 0;
ad9e2d54
EZ		 7683 g_b_init_get_native_system_info = 0;
7684 g_b_init_get_system_times = 0;
6dad7178 7685 g_b_init_create_symbolic_link = 0;
66447e07
EZ		 7686 g_b_init_get_security_descriptor_dacl = 0;
7687 g_b_init_convert_sd_to_sddl = 0;
7688 g_b_init_convert_sddl_to_sd = 0;
7689 g_b_init_is_valid_security_descriptor = 0;
7690 g_b_init_set_file_security = 0;
ad9e2d54 7691 num_of_processors = 0;
a8c3a596
JR		 7692 /* The following sets a handler for shutdown notifications for
7693 console apps. This actually applies to Emacs in both console and
7694 GUI modes, since we had to fool windows into thinking emacs is a
7695 console application to get console mode to work. */
ed3751c8 7696 SetConsoleCtrlHandler (shutdown_handler, TRUE);
8aaaec6b
EZ		 7697
7698 /* "None" is the default group name on standalone workstations. */
7699 strcpy (dflt_group_name, "None");
5c207910
EZ		 7700
7701 /* Reset, in case it has some value inherited from dump time. */
7702 w32_stat_get_owner_group = 0;
9785d95b
BK		 7703}
7704
d888760c 7705/* For make-serial-process */
b56ceb92
JB		 7706int
7707serial_open (char *port)
d888760c
GM		 7708{
7709 HANDLE hnd;
7710 child_process *cp;
7711 int fd = -1;
7712
7713 hnd = CreateFile (port, GENERIC_READ | GENERIC_WRITE, 0, 0,
7714 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
7715 if (hnd == INVALID_HANDLE_VALUE)
7716 error ("Could not open %s", port);
62aba0d4 7717 fd = (int) _open_osfhandle ((intptr_t) hnd, 0);
d888760c
GM		 7718 if (fd == -1)
7719 error ("Could not open %s", port);
7720
7721 cp = new_child ();
7722 if (!cp)
7723 error ("Could not create child process");
7724 cp->fd = fd;
7725 cp->status = STATUS_READ_ACKNOWLEDGED;
7726 fd_info[ fd ].hnd = hnd;
7727 fd_info[ fd ].flags |=
7728 FILE_READ | FILE_WRITE | FILE_BINARY | FILE_SERIAL;
7729 if (fd_info[ fd ].cp != NULL)
7730 {
7731 error ("fd_info[fd = %d] is already in use", fd);
7732 }
7733 fd_info[ fd ].cp = cp;
7734 cp->ovl_read.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL);
7735 if (cp->ovl_read.hEvent == NULL)
7736 error ("Could not create read event");
7737 cp->ovl_write.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL);
7738 if (cp->ovl_write.hEvent == NULL)
7739 error ("Could not create write event");
7740
7741 return fd;
7742}
7743
7744/* For serial-process-configure */
7745void
9d4f32e8 7746serial_configure (struct Lisp_Process *p, Lisp_Object contact)
d888760c
GM		 7747{
7748 Lisp_Object childp2 = Qnil;
7749 Lisp_Object tem = Qnil;
7750 HANDLE hnd;
7751 DCB dcb;
7752 COMMTIMEOUTS ct;
7753 char summary[4] = "???"; /* This usually becomes "8N1". */
7754
7755 if ((fd_info[ p->outfd ].flags & FILE_SERIAL) == 0)
7756 error ("Not a serial process");
7757 hnd = fd_info[ p->outfd ].hnd;
7758
4d2b044c 7759 childp2 = Fcopy_sequence (p->childp);
d888760c
GM		 7760
7761 /* Initialize timeouts for blocking read and blocking write. */
7762 if (!GetCommTimeouts (hnd, &ct))
7763 error ("GetCommTimeouts() failed");
7764 ct.ReadIntervalTimeout = 0;
7765 ct.ReadTotalTimeoutMultiplier = 0;
7766 ct.ReadTotalTimeoutConstant = 0;
7767 ct.WriteTotalTimeoutMultiplier = 0;
7768 ct.WriteTotalTimeoutConstant = 0;
7769 if (!SetCommTimeouts (hnd, &ct))
7770 error ("SetCommTimeouts() failed");
7771 /* Read port attributes and prepare default configuration. */
7772 memset (&dcb, 0, sizeof (dcb));
7773 dcb.DCBlength = sizeof (DCB);
7774 if (!GetCommState (hnd, &dcb))
7775 error ("GetCommState() failed");
7776 dcb.fBinary = TRUE;
7777 dcb.fNull = FALSE;
7778 dcb.fAbortOnError = FALSE;
7779 /* dcb.XonLim and dcb.XoffLim are set by GetCommState() */
7780 dcb.ErrorChar = 0;
7781 dcb.EofChar = 0;
7782 dcb.EvtChar = 0;
7783
7784 /* Configure speed. */
7785 if (!NILP (Fplist_member (contact, QCspeed)))
7786 tem = Fplist_get (contact, QCspeed);
7787 else
4d2b044c 7788 tem = Fplist_get (p->childp, QCspeed);
d888760c
GM		 7789 CHECK_NUMBER (tem);
7790 dcb.BaudRate = XINT (tem);
7791 childp2 = Fplist_put (childp2, QCspeed, tem);
7792
7793 /* Configure bytesize. */
7794 if (!NILP (Fplist_member (contact, QCbytesize)))
7795 tem = Fplist_get (contact, QCbytesize);
7796 else
4d2b044c 7797 tem = Fplist_get (p->childp, QCbytesize);
d888760c
GM		 7798 if (NILP (tem))
7799 tem = make_number (8);
7800 CHECK_NUMBER (tem);
7801 if (XINT (tem) != 7 && XINT (tem) != 8)
7802 error (":bytesize must be nil (8), 7, or 8");
7803 dcb.ByteSize = XINT (tem);
7804 summary[0] = XINT (tem) + '0';
7805 childp2 = Fplist_put (childp2, QCbytesize, tem);
7806
7807 /* Configure parity. */
7808 if (!NILP (Fplist_member (contact, QCparity)))
7809 tem = Fplist_get (contact, QCparity);
7810 else
4d2b044c 7811 tem = Fplist_get (p->childp, QCparity);
d888760c
GM		 7812 if (!NILP (tem) && !EQ (tem, Qeven) && !EQ (tem, Qodd))
7813 error (":parity must be nil (no parity), `even', or `odd'");
7814 dcb.fParity = FALSE;
7815 dcb.Parity = NOPARITY;
7816 dcb.fErrorChar = FALSE;
7817 if (NILP (tem))
7818 {
7819 summary[1] = 'N';
7820 }
7821 else if (EQ (tem, Qeven))
7822 {
7823 summary[1] = 'E';
7824 dcb.fParity = TRUE;
7825 dcb.Parity = EVENPARITY;
7826 dcb.fErrorChar = TRUE;
7827 }
7828 else if (EQ (tem, Qodd))
7829 {
7830 summary[1] = 'O';
7831 dcb.fParity = TRUE;
7832 dcb.Parity = ODDPARITY;
7833 dcb.fErrorChar = TRUE;
7834 }
7835 childp2 = Fplist_put (childp2, QCparity, tem);
7836
7837 /* Configure stopbits. */
7838 if (!NILP (Fplist_member (contact, QCstopbits)))
7839 tem = Fplist_get (contact, QCstopbits);
7840 else
4d2b044c 7841 tem = Fplist_get (p->childp, QCstopbits);
d888760c
GM		 7842 if (NILP (tem))
7843 tem = make_number (1);
7844 CHECK_NUMBER (tem);
7845 if (XINT (tem) != 1 && XINT (tem) != 2)
7846 error (":stopbits must be nil (1 stopbit), 1, or 2");
7847 summary[2] = XINT (tem) + '0';
7848 if (XINT (tem) == 1)
7849 dcb.StopBits = ONESTOPBIT;
7850 else if (XINT (tem) == 2)
7851 dcb.StopBits = TWOSTOPBITS;
7852 childp2 = Fplist_put (childp2, QCstopbits, tem);
7853
7854 /* Configure flowcontrol. */
7855 if (!NILP (Fplist_member (contact, QCflowcontrol)))
7856 tem = Fplist_get (contact, QCflowcontrol);
7857 else
4d2b044c 7858 tem = Fplist_get (p->childp, QCflowcontrol);
d888760c
GM		 7859 if (!NILP (tem) && !EQ (tem, Qhw) && !EQ (tem, Qsw))
7860 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
7861 dcb.fOutxCtsFlow = FALSE;
7862 dcb.fOutxDsrFlow = FALSE;
7863 dcb.fDtrControl = DTR_CONTROL_DISABLE;
7864 dcb.fDsrSensitivity = FALSE;
7865 dcb.fTXContinueOnXoff = FALSE;
7866 dcb.fOutX = FALSE;
7867 dcb.fInX = FALSE;
7868 dcb.fRtsControl = RTS_CONTROL_DISABLE;
7869 dcb.XonChar = 17; /* Control-Q */
7870 dcb.XoffChar = 19; /* Control-S */
7871 if (NILP (tem))
7872 {
7873 /* Already configured. */
7874 }
7875 else if (EQ (tem, Qhw))
7876 {
7877 dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
7878 dcb.fOutxCtsFlow = TRUE;
7879 }
7880 else if (EQ (tem, Qsw))
7881 {
7882 dcb.fOutX = TRUE;
7883 dcb.fInX = TRUE;
7884 }
7885 childp2 = Fplist_put (childp2, QCflowcontrol, tem);
7886
7887 /* Activate configuration. */
7888 if (!SetCommState (hnd, &dcb))
7889 error ("SetCommState() failed");
7890
7891 childp2 = Fplist_put (childp2, QCsummary, build_string (summary));
6a09a33b 7892 pset_childp (p, childp2);
d888760c
GM		 7893}
7894
e061a11b
TZ		 7895#ifdef HAVE_GNUTLS
7896
7897ssize_t
7898emacs_gnutls_pull (gnutls_transport_ptr_t p, void* buf, size_t sz)
7899{
d78cf5ed 7900 int n, err;
e061a11b 7901 SELECT_TYPE fdset;
a68089e4 7902 EMACS_TIME timeout;
e061a11b
TZ		 7903 struct Lisp_Process *process = (struct Lisp_Process *)p;
7904 int fd = process->infd;
7905
d78cf5ed 7906 n = sys_read (fd, (char*)buf, sz);
e061a11b 7907
d78cf5ed
CB		 7908 if (n >= 0)
7909 return n;
e061a11b 7910
d78cf5ed 7911 err = errno;
e061a11b 7912
d78cf5ed
CB		 7913 /* Translate the WSAEWOULDBLOCK alias EWOULDBLOCK to EAGAIN. */
7914 if (err == EWOULDBLOCK)
7915 err = EAGAIN;
e061a11b 7916
d78cf5ed 7917 emacs_gnutls_transport_set_errno (process->gnutls_state, err);
e061a11b 7918
d78cf5ed 7919 return -1;
e061a11b 7920}
ab5796a9 7921
e061a11b
TZ		 7922ssize_t
7923emacs_gnutls_push (gnutls_transport_ptr_t p, const void* buf, size_t sz)
7924{
7925 struct Lisp_Process *process = (struct Lisp_Process *)p;
42ce4c63 7926 int fd = process->outfd;
5e617bc2 7927 ssize_t n = sys_write (fd, buf, sz);
e061a11b
TZ		 7928
7929 /* 0 or more bytes written means everything went fine. */
7930 if (n >= 0)
7931 return n;
7932
7933 /* Negative bytes written means we got an error in errno.
7934 Translate the WSAEWOULDBLOCK alias EWOULDBLOCK to EAGAIN. */
0898ca10
JB		 7935 emacs_gnutls_transport_set_errno (process->gnutls_state,
7936 errno == EWOULDBLOCK ? EAGAIN : errno);
e061a11b
TZ		 7937
7938 return -1;
7939}
7940#endif /* HAVE_GNUTLS */
7941
7942/* end of w32.c */
Unnamed repository; edit this file 'description' to name the repository.