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* fileio.c (Finsert_file_contents): Revert code introduced at
[bpt/emacs.git] / src / w32.c
... / ...
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1/* Utility and Unix shadow routines for GNU Emacs on the Microsoft Windows API.
2 Copyright (C) 1994-1995, 2000-2013 Free Software Foundation, Inc.
3
4This file is part of GNU Emacs.
5
6GNU Emacs is free software: you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation, either version 3 of the License, or
9(at your option) any later version.
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
17along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
18
19/*
20 Geoff Voelker (voelker@cs.washington.edu) 7-29-94
21*/
22#include <stddef.h> /* for offsetof */
23#include <stdlib.h>
24#include <stdio.h>
25#include <float.h> /* for DBL_EPSILON */
26#include <io.h>
27#include <errno.h>
28#include <fcntl.h>
29#include <ctype.h>
30#include <signal.h>
31#include <sys/file.h>
32#include <sys/time.h>
33#include <sys/utime.h>
34#include <math.h>
35#include <time.h>
36
37/* must include CRT headers *before* config.h */
38
39#include <config.h>
40#include <mbstring.h> /* for _mbspbrk */
41
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
62
63#undef strerror
64
65#undef localtime
66
67#include "lisp.h"
68
69#include <pwd.h>
70#include <grp.h>
71
72#ifdef __GNUC__
73#define _ANONYMOUS_UNION
74#define _ANONYMOUS_STRUCT
75#endif
76#include <windows.h>
77/* Some versions of compiler define MEMORYSTATUSEX, some don't, so we
78 use a different name to avoid compilation problems. */
79typedef struct _MEMORY_STATUS_EX {
80 DWORD dwLength;
81 DWORD dwMemoryLoad;
82 DWORDLONG ullTotalPhys;
83 DWORDLONG ullAvailPhys;
84 DWORDLONG ullTotalPageFile;
85 DWORDLONG ullAvailPageFile;
86 DWORDLONG ullTotalVirtual;
87 DWORDLONG ullAvailVirtual;
88 DWORDLONG ullAvailExtendedVirtual;
89} MEMORY_STATUS_EX,*LPMEMORY_STATUS_EX;
90
91#include <lmcons.h>
92#include <shlobj.h>
93
94#include <tlhelp32.h>
95#include <psapi.h>
96#ifndef _MSC_VER
97#include <w32api.h>
98#endif
99#if !defined (__MINGW32__) || __W32API_MAJOR_VERSION < 3 || (__W32API_MAJOR_VERSION == 3 && __W32API_MINOR_VERSION < 15)
100/* This either is not in psapi.h or guarded by higher value of
101 _WIN32_WINNT than what we use. w32api supplied with MinGW 3.15
102 defines it in psapi.h */
103typedef struct _PROCESS_MEMORY_COUNTERS_EX {
104 DWORD cb;
105 DWORD PageFaultCount;
106 SIZE_T PeakWorkingSetSize;
107 SIZE_T WorkingSetSize;
108 SIZE_T QuotaPeakPagedPoolUsage;
109 SIZE_T QuotaPagedPoolUsage;
110 SIZE_T QuotaPeakNonPagedPoolUsage;
111 SIZE_T QuotaNonPagedPoolUsage;
112 SIZE_T PagefileUsage;
113 SIZE_T PeakPagefileUsage;
114 SIZE_T PrivateUsage;
115} PROCESS_MEMORY_COUNTERS_EX,*PPROCESS_MEMORY_COUNTERS_EX;
116#endif
117
118#include <winioctl.h>
119#include <aclapi.h>
120#include <sddl.h>
121
122#include <sys/acl.h>
123
124/* This is not in MinGW's sddl.h (but they are in MSVC headers), so we
125 define them by hand if not already defined. */
126#ifndef SDDL_REVISION_1
127#define SDDL_REVISION_1 1
128#endif /* SDDL_REVISION_1 */
129
130#ifdef _MSC_VER
131/* MSVC doesn't provide the definition of REPARSE_DATA_BUFFER and the
132 associated macros, except on ntifs.h, which cannot be included
133 because it triggers conflicts with other Windows API headers. So
134 we define it here by hand. */
135
136typedef struct _REPARSE_DATA_BUFFER {
137 ULONG ReparseTag;
138 USHORT ReparseDataLength;
139 USHORT Reserved;
140 union {
141 struct {
142 USHORT SubstituteNameOffset;
143 USHORT SubstituteNameLength;
144 USHORT PrintNameOffset;
145 USHORT PrintNameLength;
146 ULONG Flags;
147 WCHAR PathBuffer[1];
148 } SymbolicLinkReparseBuffer;
149 struct {
150 USHORT SubstituteNameOffset;
151 USHORT SubstituteNameLength;
152 USHORT PrintNameOffset;
153 USHORT PrintNameLength;
154 WCHAR PathBuffer[1];
155 } MountPointReparseBuffer;
156 struct {
157 UCHAR DataBuffer[1];
158 } GenericReparseBuffer;
159 } DUMMYUNIONNAME;
160} REPARSE_DATA_BUFFER, *PREPARSE_DATA_BUFFER;
161
162#ifndef FILE_DEVICE_FILE_SYSTEM
163#define FILE_DEVICE_FILE_SYSTEM 9
164#endif
165#ifndef METHOD_BUFFERED
166#define METHOD_BUFFERED 0
167#endif
168#ifndef FILE_ANY_ACCESS
169#define FILE_ANY_ACCESS 0x00000000
170#endif
171#ifndef CTL_CODE
172#define CTL_CODE(t,f,m,a) (((t)<<16)|((a)<<14)|((f)<<2)|(m))
173#endif
174#define FSCTL_GET_REPARSE_POINT \
175 CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 42, METHOD_BUFFERED, FILE_ANY_ACCESS)
176#endif
177
178/* TCP connection support. */
179#include <sys/socket.h>
180#undef socket
181#undef bind
182#undef connect
183#undef htons
184#undef ntohs
185#undef inet_addr
186#undef gethostname
187#undef gethostbyname
188#undef getservbyname
189#undef getpeername
190#undef shutdown
191#undef setsockopt
192#undef listen
193#undef getsockname
194#undef accept
195#undef recvfrom
196#undef sendto
197
198#include "w32.h"
199#include <dirent.h>
200#include "w32common.h"
201#include "w32heap.h"
202#include "w32select.h"
203#include "systime.h"
204#include "dispextern.h" /* for xstrcasecmp */
205#include "coding.h" /* for Vlocale_coding_system */
206
207#include "careadlinkat.h"
208#include "allocator.h"
209
210/* For serial_configure and serial_open. */
211#include "process.h"
212
213typedef HRESULT (WINAPI * ShGetFolderPath_fn)
214 (IN HWND, IN int, IN HANDLE, IN DWORD, OUT char *);
215
216Lisp_Object QCloaded_from;
217
218void globals_of_w32 (void);
219static DWORD get_rid (PSID);
220static int is_symlink (const char *);
221static char * chase_symlinks (const char *);
222static int enable_privilege (LPCTSTR, BOOL, TOKEN_PRIVILEGES *);
223static int restore_privilege (TOKEN_PRIVILEGES *);
224static BOOL WINAPI revert_to_self (void);
225
226extern int sys_access (const char *, int);
227extern void *e_malloc (size_t);
228extern int sys_select (int, SELECT_TYPE *, SELECT_TYPE *, SELECT_TYPE *,
229 EMACS_TIME *, void *);
230
231
232\f
233/* Initialization states.
234
235 WARNING: If you add any more such variables for additional APIs,
236 you MUST add initialization for them to globals_of_w32
237 below. This is because these variables might get set
238 to non-NULL values during dumping, but the dumped Emacs
239 cannot reuse those values, because it could be run on a
240 different version of the OS, where API addresses are
241 different. */
242static BOOL g_b_init_is_windows_9x;
243static BOOL g_b_init_open_process_token;
244static BOOL g_b_init_get_token_information;
245static BOOL g_b_init_lookup_account_sid;
246static BOOL g_b_init_get_sid_sub_authority;
247static BOOL g_b_init_get_sid_sub_authority_count;
248static BOOL g_b_init_get_security_info;
249static BOOL g_b_init_get_file_security;
250static BOOL g_b_init_get_security_descriptor_owner;
251static BOOL g_b_init_get_security_descriptor_group;
252static BOOL g_b_init_is_valid_sid;
253static BOOL g_b_init_create_toolhelp32_snapshot;
254static BOOL g_b_init_process32_first;
255static BOOL g_b_init_process32_next;
256static BOOL g_b_init_open_thread_token;
257static BOOL g_b_init_impersonate_self;
258static BOOL g_b_init_revert_to_self;
259static BOOL g_b_init_get_process_memory_info;
260static BOOL g_b_init_get_process_working_set_size;
261static BOOL g_b_init_global_memory_status;
262static BOOL g_b_init_global_memory_status_ex;
263static BOOL g_b_init_get_length_sid;
264static BOOL g_b_init_equal_sid;
265static BOOL g_b_init_copy_sid;
266static BOOL g_b_init_get_native_system_info;
267static BOOL g_b_init_get_system_times;
268static BOOL g_b_init_create_symbolic_link;
269static BOOL g_b_init_get_security_descriptor_dacl;
270static BOOL g_b_init_convert_sd_to_sddl;
271static BOOL g_b_init_convert_sddl_to_sd;
272static BOOL g_b_init_is_valid_security_descriptor;
273static BOOL g_b_init_set_file_security;
274
275/*
276 BEGIN: Wrapper functions around OpenProcessToken
277 and other functions in advapi32.dll that are only
278 supported in Windows NT / 2k / XP
279*/
280 /* ** Function pointer typedefs ** */
281typedef BOOL (WINAPI * OpenProcessToken_Proc) (
282 HANDLE ProcessHandle,
283 DWORD DesiredAccess,
284 PHANDLE TokenHandle);
285typedef BOOL (WINAPI * GetTokenInformation_Proc) (
286 HANDLE TokenHandle,
287 TOKEN_INFORMATION_CLASS TokenInformationClass,
288 LPVOID TokenInformation,
289 DWORD TokenInformationLength,
290 PDWORD ReturnLength);
291typedef BOOL (WINAPI * GetProcessTimes_Proc) (
292 HANDLE process_handle,
293 LPFILETIME creation_time,
294 LPFILETIME exit_time,
295 LPFILETIME kernel_time,
296 LPFILETIME user_time);
297
298GetProcessTimes_Proc get_process_times_fn = NULL;
299
300#ifdef _UNICODE
301const char * const LookupAccountSid_Name = "LookupAccountSidW";
302const char * const GetFileSecurity_Name = "GetFileSecurityW";
303const char * const SetFileSecurity_Name = "SetFileSecurityW";
304#else
305const char * const LookupAccountSid_Name = "LookupAccountSidA";
306const char * const GetFileSecurity_Name = "GetFileSecurityA";
307const char * const SetFileSecurity_Name = "SetFileSecurityA";
308#endif
309typedef BOOL (WINAPI * LookupAccountSid_Proc) (
310 LPCTSTR lpSystemName,
311 PSID Sid,
312 LPTSTR Name,
313 LPDWORD cbName,
314 LPTSTR DomainName,
315 LPDWORD cbDomainName,
316 PSID_NAME_USE peUse);
317typedef PDWORD (WINAPI * GetSidSubAuthority_Proc) (
318 PSID pSid,
319 DWORD n);
320typedef PUCHAR (WINAPI * GetSidSubAuthorityCount_Proc) (
321 PSID pSid);
322typedef DWORD (WINAPI * GetSecurityInfo_Proc) (
323 HANDLE handle,
324 SE_OBJECT_TYPE ObjectType,
325 SECURITY_INFORMATION SecurityInfo,
326 PSID *ppsidOwner,
327 PSID *ppsidGroup,
328 PACL *ppDacl,
329 PACL *ppSacl,
330 PSECURITY_DESCRIPTOR *ppSecurityDescriptor);
331typedef BOOL (WINAPI * GetFileSecurity_Proc) (
332 LPCTSTR lpFileName,
333 SECURITY_INFORMATION RequestedInformation,
334 PSECURITY_DESCRIPTOR pSecurityDescriptor,
335 DWORD nLength,
336 LPDWORD lpnLengthNeeded);
337typedef BOOL (WINAPI *SetFileSecurity_Proc) (
338 LPCTSTR lpFileName,
339 SECURITY_INFORMATION SecurityInformation,
340 PSECURITY_DESCRIPTOR pSecurityDescriptor);
341typedef BOOL (WINAPI * GetSecurityDescriptorOwner_Proc) (
342 PSECURITY_DESCRIPTOR pSecurityDescriptor,
343 PSID *pOwner,
344 LPBOOL lpbOwnerDefaulted);
345typedef BOOL (WINAPI * GetSecurityDescriptorGroup_Proc) (
346 PSECURITY_DESCRIPTOR pSecurityDescriptor,
347 PSID *pGroup,
348 LPBOOL lpbGroupDefaulted);
349typedef BOOL (WINAPI *GetSecurityDescriptorDacl_Proc) (
350 PSECURITY_DESCRIPTOR pSecurityDescriptor,
351 LPBOOL lpbDaclPresent,
352 PACL *pDacl,
353 LPBOOL lpbDaclDefaulted);
354typedef BOOL (WINAPI * IsValidSid_Proc) (
355 PSID sid);
356typedef HANDLE (WINAPI * CreateToolhelp32Snapshot_Proc) (
357 DWORD dwFlags,
358 DWORD th32ProcessID);
359typedef BOOL (WINAPI * Process32First_Proc) (
360 HANDLE hSnapshot,
361 LPPROCESSENTRY32 lppe);
362typedef BOOL (WINAPI * Process32Next_Proc) (
363 HANDLE hSnapshot,
364 LPPROCESSENTRY32 lppe);
365typedef BOOL (WINAPI * OpenThreadToken_Proc) (
366 HANDLE ThreadHandle,
367 DWORD DesiredAccess,
368 BOOL OpenAsSelf,
369 PHANDLE TokenHandle);
370typedef BOOL (WINAPI * ImpersonateSelf_Proc) (
371 SECURITY_IMPERSONATION_LEVEL ImpersonationLevel);
372typedef BOOL (WINAPI * RevertToSelf_Proc) (void);
373typedef BOOL (WINAPI * GetProcessMemoryInfo_Proc) (
374 HANDLE Process,
375 PPROCESS_MEMORY_COUNTERS ppsmemCounters,
376 DWORD cb);
377typedef BOOL (WINAPI * GetProcessWorkingSetSize_Proc) (
378 HANDLE hProcess,
379 PSIZE_T lpMinimumWorkingSetSize,
380 PSIZE_T lpMaximumWorkingSetSize);
381typedef BOOL (WINAPI * GlobalMemoryStatus_Proc) (
382 LPMEMORYSTATUS lpBuffer);
383typedef BOOL (WINAPI * GlobalMemoryStatusEx_Proc) (
384 LPMEMORY_STATUS_EX lpBuffer);
385typedef BOOL (WINAPI * CopySid_Proc) (
386 DWORD nDestinationSidLength,
387 PSID pDestinationSid,
388 PSID pSourceSid);
389typedef BOOL (WINAPI * EqualSid_Proc) (
390 PSID pSid1,
391 PSID pSid2);
392typedef DWORD (WINAPI * GetLengthSid_Proc) (
393 PSID pSid);
394typedef void (WINAPI * GetNativeSystemInfo_Proc) (
395 LPSYSTEM_INFO lpSystemInfo);
396typedef BOOL (WINAPI * GetSystemTimes_Proc) (
397 LPFILETIME lpIdleTime,
398 LPFILETIME lpKernelTime,
399 LPFILETIME lpUserTime);
400typedef BOOLEAN (WINAPI *CreateSymbolicLink_Proc) (
401 LPTSTR lpSymlinkFileName,
402 LPTSTR lpTargetFileName,
403 DWORD dwFlags);
404typedef BOOL (WINAPI *ConvertStringSecurityDescriptorToSecurityDescriptor_Proc) (
405 LPCTSTR StringSecurityDescriptor,
406 DWORD StringSDRevision,
407 PSECURITY_DESCRIPTOR *SecurityDescriptor,
408 PULONG SecurityDescriptorSize);
409typedef BOOL (WINAPI *ConvertSecurityDescriptorToStringSecurityDescriptor_Proc) (
410 PSECURITY_DESCRIPTOR SecurityDescriptor,
411 DWORD RequestedStringSDRevision,
412 SECURITY_INFORMATION SecurityInformation,
413 LPTSTR *StringSecurityDescriptor,
414 PULONG StringSecurityDescriptorLen);
415typedef BOOL (WINAPI *IsValidSecurityDescriptor_Proc) (PSECURITY_DESCRIPTOR);
416
417 /* ** A utility function ** */
418static BOOL
419is_windows_9x (void)
420{
421 static BOOL s_b_ret = 0;
422 OSVERSIONINFO os_ver;
423 if (g_b_init_is_windows_9x == 0)
424 {
425 g_b_init_is_windows_9x = 1;
426 ZeroMemory (&os_ver, sizeof (OSVERSIONINFO));
427 os_ver.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
428 if (GetVersionEx (&os_ver))
429 {
430 s_b_ret = (os_ver.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS);
431 }
432 }
433 return s_b_ret;
434}
435
436static Lisp_Object ltime (ULONGLONG);
437
438/* Get total user and system times for get-internal-run-time.
439 Returns a list of integers if the times are provided by the OS
440 (NT derivatives), otherwise it returns the result of current-time. */
441Lisp_Object
442w32_get_internal_run_time (void)
443{
444 if (get_process_times_fn)
445 {
446 FILETIME create, exit, kernel, user;
447 HANDLE proc = GetCurrentProcess ();
448 if ((*get_process_times_fn) (proc, &create, &exit, &kernel, &user))
449 {
450 LARGE_INTEGER user_int, kernel_int, total;
451 user_int.LowPart = user.dwLowDateTime;
452 user_int.HighPart = user.dwHighDateTime;
453 kernel_int.LowPart = kernel.dwLowDateTime;
454 kernel_int.HighPart = kernel.dwHighDateTime;
455 total.QuadPart = user_int.QuadPart + kernel_int.QuadPart;
456 return ltime (total.QuadPart);
457 }
458 }
459
460 return Fcurrent_time ();
461}
462
463 /* ** The wrapper functions ** */
464
465static BOOL WINAPI
466open_process_token (HANDLE ProcessHandle,
467 DWORD DesiredAccess,
468 PHANDLE TokenHandle)
469{
470 static OpenProcessToken_Proc s_pfn_Open_Process_Token = NULL;
471 HMODULE hm_advapi32 = NULL;
472 if (is_windows_9x () == TRUE)
473 {
474 return FALSE;
475 }
476 if (g_b_init_open_process_token == 0)
477 {
478 g_b_init_open_process_token = 1;
479 hm_advapi32 = LoadLibrary ("Advapi32.dll");
480 s_pfn_Open_Process_Token =
481 (OpenProcessToken_Proc) GetProcAddress (hm_advapi32, "OpenProcessToken");
482 }
483 if (s_pfn_Open_Process_Token == NULL)
484 {
485 return FALSE;
486 }
487 return (
488 s_pfn_Open_Process_Token (
489 ProcessHandle,
490 DesiredAccess,
491 TokenHandle)
492 );
493}
494
495static BOOL WINAPI
496get_token_information (HANDLE TokenHandle,
497 TOKEN_INFORMATION_CLASS TokenInformationClass,
498 LPVOID TokenInformation,
499 DWORD TokenInformationLength,
500 PDWORD ReturnLength)
501{
502 static GetTokenInformation_Proc s_pfn_Get_Token_Information = NULL;
503 HMODULE hm_advapi32 = NULL;
504 if (is_windows_9x () == TRUE)
505 {
506 return FALSE;
507 }
508 if (g_b_init_get_token_information == 0)
509 {
510 g_b_init_get_token_information = 1;
511 hm_advapi32 = LoadLibrary ("Advapi32.dll");
512 s_pfn_Get_Token_Information =
513 (GetTokenInformation_Proc) GetProcAddress (hm_advapi32, "GetTokenInformation");
514 }
515 if (s_pfn_Get_Token_Information == NULL)
516 {
517 return FALSE;
518 }
519 return (
520 s_pfn_Get_Token_Information (
521 TokenHandle,
522 TokenInformationClass,
523 TokenInformation,
524 TokenInformationLength,
525 ReturnLength)
526 );
527}
528
529static BOOL WINAPI
530lookup_account_sid (LPCTSTR lpSystemName,
531 PSID Sid,
532 LPTSTR Name,
533 LPDWORD cbName,
534 LPTSTR DomainName,
535 LPDWORD cbDomainName,
536 PSID_NAME_USE peUse)
537{
538 static LookupAccountSid_Proc s_pfn_Lookup_Account_Sid = NULL;
539 HMODULE hm_advapi32 = NULL;
540 if (is_windows_9x () == TRUE)
541 {
542 return FALSE;
543 }
544 if (g_b_init_lookup_account_sid == 0)
545 {
546 g_b_init_lookup_account_sid = 1;
547 hm_advapi32 = LoadLibrary ("Advapi32.dll");
548 s_pfn_Lookup_Account_Sid =
549 (LookupAccountSid_Proc) GetProcAddress (hm_advapi32, LookupAccountSid_Name);
550 }
551 if (s_pfn_Lookup_Account_Sid == NULL)
552 {
553 return FALSE;
554 }
555 return (
556 s_pfn_Lookup_Account_Sid (
557 lpSystemName,
558 Sid,
559 Name,
560 cbName,
561 DomainName,
562 cbDomainName,
563 peUse)
564 );
565}
566
567static PDWORD WINAPI
568get_sid_sub_authority (PSID pSid, DWORD n)
569{
570 static GetSidSubAuthority_Proc s_pfn_Get_Sid_Sub_Authority = NULL;
571 static DWORD zero = 0U;
572 HMODULE hm_advapi32 = NULL;
573 if (is_windows_9x () == TRUE)
574 {
575 return &zero;
576 }
577 if (g_b_init_get_sid_sub_authority == 0)
578 {
579 g_b_init_get_sid_sub_authority = 1;
580 hm_advapi32 = LoadLibrary ("Advapi32.dll");
581 s_pfn_Get_Sid_Sub_Authority =
582 (GetSidSubAuthority_Proc) GetProcAddress (
583 hm_advapi32, "GetSidSubAuthority");
584 }
585 if (s_pfn_Get_Sid_Sub_Authority == NULL)
586 {
587 return &zero;
588 }
589 return (s_pfn_Get_Sid_Sub_Authority (pSid, n));
590}
591
592static PUCHAR WINAPI
593get_sid_sub_authority_count (PSID pSid)
594{
595 static GetSidSubAuthorityCount_Proc s_pfn_Get_Sid_Sub_Authority_Count = NULL;
596 static UCHAR zero = 0U;
597 HMODULE hm_advapi32 = NULL;
598 if (is_windows_9x () == TRUE)
599 {
600 return &zero;
601 }
602 if (g_b_init_get_sid_sub_authority_count == 0)
603 {
604 g_b_init_get_sid_sub_authority_count = 1;
605 hm_advapi32 = LoadLibrary ("Advapi32.dll");
606 s_pfn_Get_Sid_Sub_Authority_Count =
607 (GetSidSubAuthorityCount_Proc) GetProcAddress (
608 hm_advapi32, "GetSidSubAuthorityCount");
609 }
610 if (s_pfn_Get_Sid_Sub_Authority_Count == NULL)
611 {
612 return &zero;
613 }
614 return (s_pfn_Get_Sid_Sub_Authority_Count (pSid));
615}
616
617static DWORD WINAPI
618get_security_info (HANDLE handle,
619 SE_OBJECT_TYPE ObjectType,
620 SECURITY_INFORMATION SecurityInfo,
621 PSID *ppsidOwner,
622 PSID *ppsidGroup,
623 PACL *ppDacl,
624 PACL *ppSacl,
625 PSECURITY_DESCRIPTOR *ppSecurityDescriptor)
626{
627 static GetSecurityInfo_Proc s_pfn_Get_Security_Info = NULL;
628 HMODULE hm_advapi32 = NULL;
629 if (is_windows_9x () == TRUE)
630 {
631 return FALSE;
632 }
633 if (g_b_init_get_security_info == 0)
634 {
635 g_b_init_get_security_info = 1;
636 hm_advapi32 = LoadLibrary ("Advapi32.dll");
637 s_pfn_Get_Security_Info =
638 (GetSecurityInfo_Proc) GetProcAddress (
639 hm_advapi32, "GetSecurityInfo");
640 }
641 if (s_pfn_Get_Security_Info == NULL)
642 {
643 return FALSE;
644 }
645 return (s_pfn_Get_Security_Info (handle, ObjectType, SecurityInfo,
646 ppsidOwner, ppsidGroup, ppDacl, ppSacl,
647 ppSecurityDescriptor));
648}
649
650static BOOL WINAPI
651get_file_security (LPCTSTR lpFileName,
652 SECURITY_INFORMATION RequestedInformation,
653 PSECURITY_DESCRIPTOR pSecurityDescriptor,
654 DWORD nLength,
655 LPDWORD lpnLengthNeeded)
656{
657 static GetFileSecurity_Proc s_pfn_Get_File_Security = NULL;
658 HMODULE hm_advapi32 = NULL;
659 if (is_windows_9x () == TRUE)
660 {
661 errno = ENOTSUP;
662 return FALSE;
663 }
664 if (g_b_init_get_file_security == 0)
665 {
666 g_b_init_get_file_security = 1;
667 hm_advapi32 = LoadLibrary ("Advapi32.dll");
668 s_pfn_Get_File_Security =
669 (GetFileSecurity_Proc) GetProcAddress (
670 hm_advapi32, GetFileSecurity_Name);
671 }
672 if (s_pfn_Get_File_Security == NULL)
673 {
674 errno = ENOTSUP;
675 return FALSE;
676 }
677 return (s_pfn_Get_File_Security (lpFileName, RequestedInformation,
678 pSecurityDescriptor, nLength,
679 lpnLengthNeeded));
680}
681
682static BOOL WINAPI
683set_file_security (LPCTSTR lpFileName,
684 SECURITY_INFORMATION SecurityInformation,
685 PSECURITY_DESCRIPTOR pSecurityDescriptor)
686{
687 static SetFileSecurity_Proc s_pfn_Set_File_Security = NULL;
688 HMODULE hm_advapi32 = NULL;
689 if (is_windows_9x () == TRUE)
690 {
691 errno = ENOTSUP;
692 return FALSE;
693 }
694 if (g_b_init_set_file_security == 0)
695 {
696 g_b_init_set_file_security = 1;
697 hm_advapi32 = LoadLibrary ("Advapi32.dll");
698 s_pfn_Set_File_Security =
699 (SetFileSecurity_Proc) GetProcAddress (
700 hm_advapi32, SetFileSecurity_Name);
701 }
702 if (s_pfn_Set_File_Security == NULL)
703 {
704 errno = ENOTSUP;
705 return FALSE;
706 }
707 return (s_pfn_Set_File_Security (lpFileName, SecurityInformation,
708 pSecurityDescriptor));
709}
710
711static BOOL WINAPI
712get_security_descriptor_owner (PSECURITY_DESCRIPTOR pSecurityDescriptor,
713 PSID *pOwner,
714 LPBOOL lpbOwnerDefaulted)
715{
716 static GetSecurityDescriptorOwner_Proc s_pfn_Get_Security_Descriptor_Owner = NULL;
717 HMODULE hm_advapi32 = NULL;
718 if (is_windows_9x () == TRUE)
719 {
720 errno = ENOTSUP;
721 return FALSE;
722 }
723 if (g_b_init_get_security_descriptor_owner == 0)
724 {
725 g_b_init_get_security_descriptor_owner = 1;
726 hm_advapi32 = LoadLibrary ("Advapi32.dll");
727 s_pfn_Get_Security_Descriptor_Owner =
728 (GetSecurityDescriptorOwner_Proc) GetProcAddress (
729 hm_advapi32, "GetSecurityDescriptorOwner");
730 }
731 if (s_pfn_Get_Security_Descriptor_Owner == NULL)
732 {
733 errno = ENOTSUP;
734 return FALSE;
735 }
736 return (s_pfn_Get_Security_Descriptor_Owner (pSecurityDescriptor, pOwner,
737 lpbOwnerDefaulted));
738}
739
740static BOOL WINAPI
741get_security_descriptor_group (PSECURITY_DESCRIPTOR pSecurityDescriptor,
742 PSID *pGroup,
743 LPBOOL lpbGroupDefaulted)
744{
745 static GetSecurityDescriptorGroup_Proc s_pfn_Get_Security_Descriptor_Group = NULL;
746 HMODULE hm_advapi32 = NULL;
747 if (is_windows_9x () == TRUE)
748 {
749 errno = ENOTSUP;
750 return FALSE;
751 }
752 if (g_b_init_get_security_descriptor_group == 0)
753 {
754 g_b_init_get_security_descriptor_group = 1;
755 hm_advapi32 = LoadLibrary ("Advapi32.dll");
756 s_pfn_Get_Security_Descriptor_Group =
757 (GetSecurityDescriptorGroup_Proc) GetProcAddress (
758 hm_advapi32, "GetSecurityDescriptorGroup");
759 }
760 if (s_pfn_Get_Security_Descriptor_Group == NULL)
761 {
762 errno = ENOTSUP;
763 return FALSE;
764 }
765 return (s_pfn_Get_Security_Descriptor_Group (pSecurityDescriptor, pGroup,
766 lpbGroupDefaulted));
767}
768
769static BOOL WINAPI
770get_security_descriptor_dacl (PSECURITY_DESCRIPTOR pSecurityDescriptor,
771 LPBOOL lpbDaclPresent,
772 PACL *pDacl,
773 LPBOOL lpbDaclDefaulted)
774{
775 static GetSecurityDescriptorDacl_Proc s_pfn_Get_Security_Descriptor_Dacl = NULL;
776 HMODULE hm_advapi32 = NULL;
777 if (is_windows_9x () == TRUE)
778 {
779 errno = ENOTSUP;
780 return FALSE;
781 }
782 if (g_b_init_get_security_descriptor_dacl == 0)
783 {
784 g_b_init_get_security_descriptor_dacl = 1;
785 hm_advapi32 = LoadLibrary ("Advapi32.dll");
786 s_pfn_Get_Security_Descriptor_Dacl =
787 (GetSecurityDescriptorDacl_Proc) GetProcAddress (
788 hm_advapi32, "GetSecurityDescriptorDacl");
789 }
790 if (s_pfn_Get_Security_Descriptor_Dacl == NULL)
791 {
792 errno = ENOTSUP;
793 return FALSE;
794 }
795 return (s_pfn_Get_Security_Descriptor_Dacl (pSecurityDescriptor,
796 lpbDaclPresent, pDacl,
797 lpbDaclDefaulted));
798}
799
800static BOOL WINAPI
801is_valid_sid (PSID sid)
802{
803 static IsValidSid_Proc s_pfn_Is_Valid_Sid = NULL;
804 HMODULE hm_advapi32 = NULL;
805 if (is_windows_9x () == TRUE)
806 {
807 return FALSE;
808 }
809 if (g_b_init_is_valid_sid == 0)
810 {
811 g_b_init_is_valid_sid = 1;
812 hm_advapi32 = LoadLibrary ("Advapi32.dll");
813 s_pfn_Is_Valid_Sid =
814 (IsValidSid_Proc) GetProcAddress (
815 hm_advapi32, "IsValidSid");
816 }
817 if (s_pfn_Is_Valid_Sid == NULL)
818 {
819 return FALSE;
820 }
821 return (s_pfn_Is_Valid_Sid (sid));
822}
823
824static BOOL WINAPI
825equal_sid (PSID sid1, PSID sid2)
826{
827 static EqualSid_Proc s_pfn_Equal_Sid = NULL;
828 HMODULE hm_advapi32 = NULL;
829 if (is_windows_9x () == TRUE)
830 {
831 return FALSE;
832 }
833 if (g_b_init_equal_sid == 0)
834 {
835 g_b_init_equal_sid = 1;
836 hm_advapi32 = LoadLibrary ("Advapi32.dll");
837 s_pfn_Equal_Sid =
838 (EqualSid_Proc) GetProcAddress (
839 hm_advapi32, "EqualSid");
840 }
841 if (s_pfn_Equal_Sid == NULL)
842 {
843 return FALSE;
844 }
845 return (s_pfn_Equal_Sid (sid1, sid2));
846}
847
848static DWORD WINAPI
849get_length_sid (PSID sid)
850{
851 static GetLengthSid_Proc s_pfn_Get_Length_Sid = NULL;
852 HMODULE hm_advapi32 = NULL;
853 if (is_windows_9x () == TRUE)
854 {
855 return 0;
856 }
857 if (g_b_init_get_length_sid == 0)
858 {
859 g_b_init_get_length_sid = 1;
860 hm_advapi32 = LoadLibrary ("Advapi32.dll");
861 s_pfn_Get_Length_Sid =
862 (GetLengthSid_Proc) GetProcAddress (
863 hm_advapi32, "GetLengthSid");
864 }
865 if (s_pfn_Get_Length_Sid == NULL)
866 {
867 return 0;
868 }
869 return (s_pfn_Get_Length_Sid (sid));
870}
871
872static BOOL WINAPI
873copy_sid (DWORD destlen, PSID dest, PSID src)
874{
875 static CopySid_Proc s_pfn_Copy_Sid = NULL;
876 HMODULE hm_advapi32 = NULL;
877 if (is_windows_9x () == TRUE)
878 {
879 return FALSE;
880 }
881 if (g_b_init_copy_sid == 0)
882 {
883 g_b_init_copy_sid = 1;
884 hm_advapi32 = LoadLibrary ("Advapi32.dll");
885 s_pfn_Copy_Sid =
886 (CopySid_Proc) GetProcAddress (
887 hm_advapi32, "CopySid");
888 }
889 if (s_pfn_Copy_Sid == NULL)
890 {
891 return FALSE;
892 }
893 return (s_pfn_Copy_Sid (destlen, dest, src));
894}
895
896/*
897 END: Wrapper functions around OpenProcessToken
898 and other functions in advapi32.dll that are only
899 supported in Windows NT / 2k / XP
900*/
901
902static void WINAPI
903get_native_system_info (LPSYSTEM_INFO lpSystemInfo)
904{
905 static GetNativeSystemInfo_Proc s_pfn_Get_Native_System_Info = NULL;
906 if (is_windows_9x () != TRUE)
907 {
908 if (g_b_init_get_native_system_info == 0)
909 {
910 g_b_init_get_native_system_info = 1;
911 s_pfn_Get_Native_System_Info =
912 (GetNativeSystemInfo_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
913 "GetNativeSystemInfo");
914 }
915 if (s_pfn_Get_Native_System_Info != NULL)
916 s_pfn_Get_Native_System_Info (lpSystemInfo);
917 }
918 else
919 lpSystemInfo->dwNumberOfProcessors = -1;
920}
921
922static BOOL WINAPI
923get_system_times (LPFILETIME lpIdleTime,
924 LPFILETIME lpKernelTime,
925 LPFILETIME lpUserTime)
926{
927 static GetSystemTimes_Proc s_pfn_Get_System_times = NULL;
928 if (is_windows_9x () == TRUE)
929 {
930 return FALSE;
931 }
932 if (g_b_init_get_system_times == 0)
933 {
934 g_b_init_get_system_times = 1;
935 s_pfn_Get_System_times =
936 (GetSystemTimes_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
937 "GetSystemTimes");
938 }
939 if (s_pfn_Get_System_times == NULL)
940 return FALSE;
941 return (s_pfn_Get_System_times (lpIdleTime, lpKernelTime, lpUserTime));
942}
943
944static BOOLEAN WINAPI
945create_symbolic_link (LPTSTR lpSymlinkFilename,
946 LPTSTR lpTargetFileName,
947 DWORD dwFlags)
948{
949 static CreateSymbolicLink_Proc s_pfn_Create_Symbolic_Link = NULL;
950 BOOLEAN retval;
951
952 if (is_windows_9x () == TRUE)
953 {
954 errno = ENOSYS;
955 return 0;
956 }
957 if (g_b_init_create_symbolic_link == 0)
958 {
959 g_b_init_create_symbolic_link = 1;
960#ifdef _UNICODE
961 s_pfn_Create_Symbolic_Link =
962 (CreateSymbolicLink_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
963 "CreateSymbolicLinkW");
964#else
965 s_pfn_Create_Symbolic_Link =
966 (CreateSymbolicLink_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"),
967 "CreateSymbolicLinkA");
968#endif
969 }
970 if (s_pfn_Create_Symbolic_Link == NULL)
971 {
972 errno = ENOSYS;
973 return 0;
974 }
975
976 retval = s_pfn_Create_Symbolic_Link (lpSymlinkFilename, lpTargetFileName,
977 dwFlags);
978 /* If we were denied creation of the symlink, try again after
979 enabling the SeCreateSymbolicLinkPrivilege for our process. */
980 if (!retval)
981 {
982 TOKEN_PRIVILEGES priv_current;
983
984 if (enable_privilege (SE_CREATE_SYMBOLIC_LINK_NAME, TRUE, &priv_current))
985 {
986 retval = s_pfn_Create_Symbolic_Link (lpSymlinkFilename, lpTargetFileName,
987 dwFlags);
988 restore_privilege (&priv_current);
989 revert_to_self ();
990 }
991 }
992 return retval;
993}
994
995static BOOL WINAPI
996is_valid_security_descriptor (PSECURITY_DESCRIPTOR pSecurityDescriptor)
997{
998 static IsValidSecurityDescriptor_Proc s_pfn_Is_Valid_Security_Descriptor_Proc = NULL;
999
1000 if (is_windows_9x () == TRUE)
1001 {
1002 errno = ENOTSUP;
1003 return FALSE;
1004 }
1005
1006 if (g_b_init_is_valid_security_descriptor == 0)
1007 {
1008 g_b_init_is_valid_security_descriptor = 1;
1009 s_pfn_Is_Valid_Security_Descriptor_Proc =
1010 (IsValidSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1011 "IsValidSecurityDescriptor");
1012 }
1013 if (s_pfn_Is_Valid_Security_Descriptor_Proc == NULL)
1014 {
1015 errno = ENOTSUP;
1016 return FALSE;
1017 }
1018
1019 return s_pfn_Is_Valid_Security_Descriptor_Proc (pSecurityDescriptor);
1020}
1021
1022static BOOL WINAPI
1023convert_sd_to_sddl (PSECURITY_DESCRIPTOR SecurityDescriptor,
1024 DWORD RequestedStringSDRevision,
1025 SECURITY_INFORMATION SecurityInformation,
1026 LPTSTR *StringSecurityDescriptor,
1027 PULONG StringSecurityDescriptorLen)
1028{
1029 static ConvertSecurityDescriptorToStringSecurityDescriptor_Proc s_pfn_Convert_SD_To_SDDL = NULL;
1030 BOOL retval;
1031
1032 if (is_windows_9x () == TRUE)
1033 {
1034 errno = ENOTSUP;
1035 return FALSE;
1036 }
1037
1038 if (g_b_init_convert_sd_to_sddl == 0)
1039 {
1040 g_b_init_convert_sd_to_sddl = 1;
1041#ifdef _UNICODE
1042 s_pfn_Convert_SD_To_SDDL =
1043 (ConvertSecurityDescriptorToStringSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1044 "ConvertSecurityDescriptorToStringSecurityDescriptorW");
1045#else
1046 s_pfn_Convert_SD_To_SDDL =
1047 (ConvertSecurityDescriptorToStringSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1048 "ConvertSecurityDescriptorToStringSecurityDescriptorA");
1049#endif
1050 }
1051 if (s_pfn_Convert_SD_To_SDDL == NULL)
1052 {
1053 errno = ENOTSUP;
1054 return FALSE;
1055 }
1056
1057 retval = s_pfn_Convert_SD_To_SDDL (SecurityDescriptor,
1058 RequestedStringSDRevision,
1059 SecurityInformation,
1060 StringSecurityDescriptor,
1061 StringSecurityDescriptorLen);
1062
1063 return retval;
1064}
1065
1066static BOOL WINAPI
1067convert_sddl_to_sd (LPCTSTR StringSecurityDescriptor,
1068 DWORD StringSDRevision,
1069 PSECURITY_DESCRIPTOR *SecurityDescriptor,
1070 PULONG SecurityDescriptorSize)
1071{
1072 static ConvertStringSecurityDescriptorToSecurityDescriptor_Proc s_pfn_Convert_SDDL_To_SD = NULL;
1073 BOOL retval;
1074
1075 if (is_windows_9x () == TRUE)
1076 {
1077 errno = ENOTSUP;
1078 return FALSE;
1079 }
1080
1081 if (g_b_init_convert_sddl_to_sd == 0)
1082 {
1083 g_b_init_convert_sddl_to_sd = 1;
1084#ifdef _UNICODE
1085 s_pfn_Convert_SDDL_To_SD =
1086 (ConvertStringSecurityDescriptorToSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1087 "ConvertStringSecurityDescriptorToSecurityDescriptorW");
1088#else
1089 s_pfn_Convert_SDDL_To_SD =
1090 (ConvertStringSecurityDescriptorToSecurityDescriptor_Proc)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1091 "ConvertStringSecurityDescriptorToSecurityDescriptorA");
1092#endif
1093 }
1094 if (s_pfn_Convert_SDDL_To_SD == NULL)
1095 {
1096 errno = ENOTSUP;
1097 return FALSE;
1098 }
1099
1100 retval = s_pfn_Convert_SDDL_To_SD (StringSecurityDescriptor,
1101 StringSDRevision,
1102 SecurityDescriptor,
1103 SecurityDescriptorSize);
1104
1105 return retval;
1106}
1107
1108\f
1109
1110/* Return 1 if P is a valid pointer to an object of size SIZE. Return
1111 0 if P is NOT a valid pointer. Return -1 if we cannot validate P.
1112
1113 This is called from alloc.c:valid_pointer_p. */
1114int
1115w32_valid_pointer_p (void *p, int size)
1116{
1117 SIZE_T done;
1118 HANDLE h = OpenProcess (PROCESS_VM_READ, FALSE, GetCurrentProcessId ());
1119
1120 if (h)
1121 {
1122 unsigned char *buf = alloca (size);
1123 int retval = ReadProcessMemory (h, p, buf, size, &done);
1124
1125 CloseHandle (h);
1126 return retval;
1127 }
1128 else
1129 return -1;
1130}
1131
1132static char startup_dir[MAXPATHLEN];
1133
1134/* Get the current working directory. */
1135char *
1136getcwd (char *dir, int dirsize)
1137{
1138 if (!dirsize)
1139 {
1140 errno = EINVAL;
1141 return NULL;
1142 }
1143 if (dirsize <= strlen (startup_dir))
1144 {
1145 errno = ERANGE;
1146 return NULL;
1147 }
1148#if 0
1149 if (GetCurrentDirectory (MAXPATHLEN, dir) > 0)
1150 return dir;
1151 return NULL;
1152#else
1153 /* Emacs doesn't actually change directory itself, it stays in the
1154 same directory where it was started. */
1155 strcpy (dir, startup_dir);
1156 return dir;
1157#endif
1158}
1159
1160/* Emulate getloadavg. */
1161
1162struct load_sample {
1163 time_t sample_time;
1164 ULONGLONG idle;
1165 ULONGLONG kernel;
1166 ULONGLONG user;
1167};
1168
1169/* Number of processors on this machine. */
1170static unsigned num_of_processors;
1171
1172/* We maintain 1-sec samples for the last 16 minutes in a circular buffer. */
1173static struct load_sample samples[16*60];
1174static int first_idx = -1, last_idx = -1;
1175static int max_idx = sizeof (samples) / sizeof (samples[0]);
1176
1177static int
1178buf_next (int from)
1179{
1180 int next_idx = from + 1;
1181
1182 if (next_idx >= max_idx)
1183 next_idx = 0;
1184
1185 return next_idx;
1186}
1187
1188static int
1189buf_prev (int from)
1190{
1191 int prev_idx = from - 1;
1192
1193 if (prev_idx < 0)
1194 prev_idx = max_idx - 1;
1195
1196 return prev_idx;
1197}
1198
1199static void
1200sample_system_load (ULONGLONG *idle, ULONGLONG *kernel, ULONGLONG *user)
1201{
1202 SYSTEM_INFO sysinfo;
1203 FILETIME ft_idle, ft_user, ft_kernel;
1204
1205 /* Initialize the number of processors on this machine. */
1206 if (num_of_processors <= 0)
1207 {
1208 get_native_system_info (&sysinfo);
1209 num_of_processors = sysinfo.dwNumberOfProcessors;
1210 if (num_of_processors <= 0)
1211 {
1212 GetSystemInfo (&sysinfo);
1213 num_of_processors = sysinfo.dwNumberOfProcessors;
1214 }
1215 if (num_of_processors <= 0)
1216 num_of_processors = 1;
1217 }
1218
1219 /* TODO: Take into account threads that are ready to run, by
1220 sampling the "\System\Processor Queue Length" performance
1221 counter. The code below accounts only for threads that are
1222 actually running. */
1223
1224 if (get_system_times (&ft_idle, &ft_kernel, &ft_user))
1225 {
1226 ULARGE_INTEGER uidle, ukernel, uuser;
1227
1228 memcpy (&uidle, &ft_idle, sizeof (ft_idle));
1229 memcpy (&ukernel, &ft_kernel, sizeof (ft_kernel));
1230 memcpy (&uuser, &ft_user, sizeof (ft_user));
1231 *idle = uidle.QuadPart;
1232 *kernel = ukernel.QuadPart;
1233 *user = uuser.QuadPart;
1234 }
1235 else
1236 {
1237 *idle = 0;
1238 *kernel = 0;
1239 *user = 0;
1240 }
1241}
1242
1243/* Produce the load average for a given time interval, using the
1244 samples in the samples[] array. WHICH can be 0, 1, or 2, meaning
1245 1-minute, 5-minute, or 15-minute average, respectively. */
1246static double
1247getavg (int which)
1248{
1249 double retval = -1.0;
1250 double tdiff;
1251 int idx;
1252 double span = (which == 0 ? 1.0 : (which == 1 ? 5.0 : 15.0)) * 60;
1253 time_t now = samples[last_idx].sample_time;
1254
1255 if (first_idx != last_idx)
1256 {
1257 for (idx = buf_prev (last_idx); ; idx = buf_prev (idx))
1258 {
1259 tdiff = difftime (now, samples[idx].sample_time);
1260 if (tdiff >= span - 2*DBL_EPSILON*now)
1261 {
1262 long double sys =
1263 samples[last_idx].kernel + samples[last_idx].user
1264 - (samples[idx].kernel + samples[idx].user);
1265 long double idl = samples[last_idx].idle - samples[idx].idle;
1266
1267 retval = (1.0 - idl / sys) * num_of_processors;
1268 break;
1269 }
1270 if (idx == first_idx)
1271 break;
1272 }
1273 }
1274
1275 return retval;
1276}
1277
1278int
1279getloadavg (double loadavg[], int nelem)
1280{
1281 int elem;
1282 ULONGLONG idle, kernel, user;
1283 time_t now = time (NULL);
1284
1285 /* Store another sample. We ignore samples that are less than 1 sec
1286 apart. */
1287 if (difftime (now, samples[last_idx].sample_time) >= 1.0 - 2*DBL_EPSILON*now)
1288 {
1289 sample_system_load (&idle, &kernel, &user);
1290 last_idx = buf_next (last_idx);
1291 samples[last_idx].sample_time = now;
1292 samples[last_idx].idle = idle;
1293 samples[last_idx].kernel = kernel;
1294 samples[last_idx].user = user;
1295 /* If the buffer has more that 15 min worth of samples, discard
1296 the old ones. */
1297 if (first_idx == -1)
1298 first_idx = last_idx;
1299 while (first_idx != last_idx
1300 && (difftime (now, samples[first_idx].sample_time)
1301 >= 15.0*60 + 2*DBL_EPSILON*now))
1302 first_idx = buf_next (first_idx);
1303 }
1304
1305 for (elem = 0; elem < nelem; elem++)
1306 {
1307 double avg = getavg (elem);
1308
1309 if (avg < 0)
1310 break;
1311 loadavg[elem] = avg;
1312 }
1313
1314 return elem;
1315}
1316
1317/* Emulate getpwuid, getpwnam and others. */
1318
1319#define PASSWD_FIELD_SIZE 256
1320
1321static char dflt_passwd_name[PASSWD_FIELD_SIZE];
1322static char dflt_passwd_passwd[PASSWD_FIELD_SIZE];
1323static char dflt_passwd_gecos[PASSWD_FIELD_SIZE];
1324static char dflt_passwd_dir[PASSWD_FIELD_SIZE];
1325static char dflt_passwd_shell[PASSWD_FIELD_SIZE];
1326
1327static struct passwd dflt_passwd =
1328{
1329 dflt_passwd_name,
1330 dflt_passwd_passwd,
1331 0,
1332 0,
1333 0,
1334 dflt_passwd_gecos,
1335 dflt_passwd_dir,
1336 dflt_passwd_shell,
1337};
1338
1339static char dflt_group_name[GNLEN+1];
1340
1341static struct group dflt_group =
1342{
1343 /* When group information is not available, we return this as the
1344 group for all files. */
1345 dflt_group_name,
1346 0,
1347};
1348
1349unsigned
1350getuid (void)
1351{
1352 return dflt_passwd.pw_uid;
1353}
1354
1355unsigned
1356geteuid (void)
1357{
1358 /* I could imagine arguing for checking to see whether the user is
1359 in the Administrators group and returning a UID of 0 for that
1360 case, but I don't know how wise that would be in the long run. */
1361 return getuid ();
1362}
1363
1364unsigned
1365getgid (void)
1366{
1367 return dflt_passwd.pw_gid;
1368}
1369
1370unsigned
1371getegid (void)
1372{
1373 return getgid ();
1374}
1375
1376struct passwd *
1377getpwuid (unsigned uid)
1378{
1379 if (uid == dflt_passwd.pw_uid)
1380 return &dflt_passwd;
1381 return NULL;
1382}
1383
1384struct group *
1385getgrgid (gid_t gid)
1386{
1387 return &dflt_group;
1388}
1389
1390struct passwd *
1391getpwnam (char *name)
1392{
1393 struct passwd *pw;
1394
1395 pw = getpwuid (getuid ());
1396 if (!pw)
1397 return pw;
1398
1399 if (xstrcasecmp (name, pw->pw_name))
1400 return NULL;
1401
1402 return pw;
1403}
1404
1405static void
1406init_user_info (void)
1407{
1408 /* Find the user's real name by opening the process token and
1409 looking up the name associated with the user-sid in that token.
1410
1411 Use the relative portion of the identifier authority value from
1412 the user-sid as the user id value (same for group id using the
1413 primary group sid from the process token). */
1414
1415 char uname[UNLEN+1], gname[GNLEN+1], domain[1025];
1416 DWORD ulength = sizeof (uname), dlength = sizeof (domain), needed;
1417 DWORD glength = sizeof (gname);
1418 HANDLE token = NULL;
1419 SID_NAME_USE user_type;
1420 unsigned char *buf = NULL;
1421 DWORD blen = 0;
1422 TOKEN_USER user_token;
1423 TOKEN_PRIMARY_GROUP group_token;
1424 BOOL result;
1425
1426 result = open_process_token (GetCurrentProcess (), TOKEN_QUERY, &token);
1427 if (result)
1428 {
1429 result = get_token_information (token, TokenUser, NULL, 0, &blen);
1430 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
1431 {
1432 buf = xmalloc (blen);
1433 result = get_token_information (token, TokenUser,
1434 (LPVOID)buf, blen, &needed);
1435 if (result)
1436 {
1437 memcpy (&user_token, buf, sizeof (user_token));
1438 result = lookup_account_sid (NULL, user_token.User.Sid,
1439 uname, &ulength,
1440 domain, &dlength, &user_type);
1441 }
1442 }
1443 else
1444 result = FALSE;
1445 }
1446 if (result)
1447 {
1448 strcpy (dflt_passwd.pw_name, uname);
1449 /* Determine a reasonable uid value. */
1450 if (xstrcasecmp ("administrator", uname) == 0)
1451 {
1452 dflt_passwd.pw_uid = 500; /* well-known Administrator uid */
1453 dflt_passwd.pw_gid = 513; /* well-known None gid */
1454 }
1455 else
1456 {
1457 /* Use the last sub-authority value of the RID, the relative
1458 portion of the SID, as user/group ID. */
1459 dflt_passwd.pw_uid = get_rid (user_token.User.Sid);
1460
1461 /* Get group id and name. */
1462 result = get_token_information (token, TokenPrimaryGroup,
1463 (LPVOID)buf, blen, &needed);
1464 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
1465 {
1466 buf = xrealloc (buf, blen = needed);
1467 result = get_token_information (token, TokenPrimaryGroup,
1468 (LPVOID)buf, blen, &needed);
1469 }
1470 if (result)
1471 {
1472 memcpy (&group_token, buf, sizeof (group_token));
1473 dflt_passwd.pw_gid = get_rid (group_token.PrimaryGroup);
1474 dlength = sizeof (domain);
1475 /* If we can get at the real Primary Group name, use that.
1476 Otherwise, the default group name was already set to
1477 "None" in globals_of_w32. */
1478 if (lookup_account_sid (NULL, group_token.PrimaryGroup,
1479 gname, &glength, NULL, &dlength,
1480 &user_type))
1481 strcpy (dflt_group_name, gname);
1482 }
1483 else
1484 dflt_passwd.pw_gid = dflt_passwd.pw_uid;
1485 }
1486 }
1487 /* If security calls are not supported (presumably because we
1488 are running under Windows 9X), fallback to this: */
1489 else if (GetUserName (uname, &ulength))
1490 {
1491 strcpy (dflt_passwd.pw_name, uname);
1492 if (xstrcasecmp ("administrator", uname) == 0)
1493 dflt_passwd.pw_uid = 0;
1494 else
1495 dflt_passwd.pw_uid = 123;
1496 dflt_passwd.pw_gid = dflt_passwd.pw_uid;
1497 }
1498 else
1499 {
1500 strcpy (dflt_passwd.pw_name, "unknown");
1501 dflt_passwd.pw_uid = 123;
1502 dflt_passwd.pw_gid = 123;
1503 }
1504 dflt_group.gr_gid = dflt_passwd.pw_gid;
1505
1506 /* Ensure HOME and SHELL are defined. */
1507 if (getenv ("HOME") == NULL)
1508 emacs_abort ();
1509 if (getenv ("SHELL") == NULL)
1510 emacs_abort ();
1511
1512 /* Set dir and shell from environment variables. */
1513 strcpy (dflt_passwd.pw_dir, getenv ("HOME"));
1514 strcpy (dflt_passwd.pw_shell, getenv ("SHELL"));
1515
1516 xfree (buf);
1517 if (token)
1518 CloseHandle (token);
1519}
1520
1521int
1522random (void)
1523{
1524 /* rand () on NT gives us 15 random bits...hack together 30 bits. */
1525 return ((rand () << 15) | rand ());
1526}
1527
1528void
1529srandom (int seed)
1530{
1531 srand (seed);
1532}
1533
1534
1535/* Normalize filename by converting all path separators to
1536 the specified separator. Also conditionally convert upper
1537 case path name components to lower case. */
1538
1539static void
1540normalize_filename (register char *fp, char path_sep)
1541{
1542 char sep;
1543 char *elem;
1544
1545 /* Always lower-case drive letters a-z, even if the filesystem
1546 preserves case in filenames.
1547 This is so filenames can be compared by string comparison
1548 functions that are case-sensitive. Even case-preserving filesystems
1549 do not distinguish case in drive letters. */
1550 if (fp[1] == ':' && *fp >= 'A' && *fp <= 'Z')
1551 {
1552 *fp += 'a' - 'A';
1553 fp += 2;
1554 }
1555
1556 if (NILP (Vw32_downcase_file_names))
1557 {
1558 while (*fp)
1559 {
1560 if (*fp == '/' || *fp == '\\')
1561 *fp = path_sep;
1562 fp++;
1563 }
1564 return;
1565 }
1566
1567 sep = path_sep; /* convert to this path separator */
1568 elem = fp; /* start of current path element */
1569
1570 do {
1571 if (*fp >= 'a' && *fp <= 'z')
1572 elem = 0; /* don't convert this element */
1573
1574 if (*fp == 0 || *fp == ':')
1575 {
1576 sep = *fp; /* restore current separator (or 0) */
1577 *fp = '/'; /* after conversion of this element */
1578 }
1579
1580 if (*fp == '/' || *fp == '\\')
1581 {
1582 if (elem && elem != fp)
1583 {
1584 *fp = 0; /* temporary end of string */
1585 _strlwr (elem); /* while we convert to lower case */
1586 }
1587 *fp = sep; /* convert (or restore) path separator */
1588 elem = fp + 1; /* next element starts after separator */
1589 sep = path_sep;
1590 }
1591 } while (*fp++);
1592}
1593
1594/* Destructively turn backslashes into slashes. */
1595void
1596dostounix_filename (register char *p)
1597{
1598 normalize_filename (p, '/');
1599}
1600
1601/* Destructively turn slashes into backslashes. */
1602void
1603unixtodos_filename (register char *p)
1604{
1605 normalize_filename (p, '\\');
1606}
1607
1608/* Remove all CR's that are followed by a LF.
1609 (From msdos.c...probably should figure out a way to share it,
1610 although this code isn't going to ever change.) */
1611static int
1612crlf_to_lf (register int n, register unsigned char *buf)
1613{
1614 unsigned char *np = buf;
1615 unsigned char *startp = buf;
1616 unsigned char *endp = buf + n;
1617
1618 if (n == 0)
1619 return n;
1620 while (buf < endp - 1)
1621 {
1622 if (*buf == 0x0d)
1623 {
1624 if (*(++buf) != 0x0a)
1625 *np++ = 0x0d;
1626 }
1627 else
1628 *np++ = *buf++;
1629 }
1630 if (buf < endp)
1631 *np++ = *buf++;
1632 return np - startp;
1633}
1634
1635/* Parse the root part of file name, if present. Return length and
1636 optionally store pointer to char after root. */
1637static int
1638parse_root (char * name, char ** pPath)
1639{
1640 char * start = name;
1641
1642 if (name == NULL)
1643 return 0;
1644
1645 /* find the root name of the volume if given */
1646 if (isalpha (name[0]) && name[1] == ':')
1647 {
1648 /* skip past drive specifier */
1649 name += 2;
1650 if (IS_DIRECTORY_SEP (name[0]))
1651 name++;
1652 }
1653 else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1]))
1654 {
1655 int slashes = 2;
1656 name += 2;
1657 do
1658 {
1659 if (IS_DIRECTORY_SEP (*name) && --slashes == 0)
1660 break;
1661 name++;
1662 }
1663 while ( *name );
1664 if (IS_DIRECTORY_SEP (name[0]))
1665 name++;
1666 }
1667
1668 if (pPath)
1669 *pPath = name;
1670
1671 return name - start;
1672}
1673
1674/* Get long base name for name; name is assumed to be absolute. */
1675static int
1676get_long_basename (char * name, char * buf, int size)
1677{
1678 WIN32_FIND_DATA find_data;
1679 HANDLE dir_handle;
1680 int len = 0;
1681
1682 /* must be valid filename, no wild cards or other invalid characters */
1683 if (_mbspbrk (name, "*?|<>\""))
1684 return 0;
1685
1686 dir_handle = FindFirstFile (name, &find_data);
1687 if (dir_handle != INVALID_HANDLE_VALUE)
1688 {
1689 if ((len = strlen (find_data.cFileName)) < size)
1690 memcpy (buf, find_data.cFileName, len + 1);
1691 else
1692 len = 0;
1693 FindClose (dir_handle);
1694 }
1695 return len;
1696}
1697
1698/* Get long name for file, if possible (assumed to be absolute). */
1699BOOL
1700w32_get_long_filename (char * name, char * buf, int size)
1701{
1702 char * o = buf;
1703 char * p;
1704 char * q;
1705 char full[ MAX_PATH ];
1706 int len;
1707
1708 len = strlen (name);
1709 if (len >= MAX_PATH)
1710 return FALSE;
1711
1712 /* Use local copy for destructive modification. */
1713 memcpy (full, name, len+1);
1714 unixtodos_filename (full);
1715
1716 /* Copy root part verbatim. */
1717 len = parse_root (full, &p);
1718 memcpy (o, full, len);
1719 o += len;
1720 *o = '\0';
1721 size -= len;
1722
1723 while (p != NULL && *p)
1724 {
1725 q = p;
1726 p = strchr (q, '\\');
1727 if (p) *p = '\0';
1728 len = get_long_basename (full, o, size);
1729 if (len > 0)
1730 {
1731 o += len;
1732 size -= len;
1733 if (p != NULL)
1734 {
1735 *p++ = '\\';
1736 if (size < 2)
1737 return FALSE;
1738 *o++ = '\\';
1739 size--;
1740 *o = '\0';
1741 }
1742 }
1743 else
1744 return FALSE;
1745 }
1746
1747 return TRUE;
1748}
1749
1750static int
1751is_unc_volume (const char *filename)
1752{
1753 const char *ptr = filename;
1754
1755 if (!IS_DIRECTORY_SEP (ptr[0]) || !IS_DIRECTORY_SEP (ptr[1]) || !ptr[2])
1756 return 0;
1757
1758 if (_mbspbrk (ptr + 2, "*?|<>\"\\/"))
1759 return 0;
1760
1761 return 1;
1762}
1763
1764/* Emulate the Posix unsetenv. */
1765int
1766unsetenv (const char *name)
1767{
1768 char *var;
1769 size_t name_len;
1770 int retval;
1771
1772 if (name == NULL || *name == '\0' || strchr (name, '=') != NULL)
1773 {
1774 errno = EINVAL;
1775 return -1;
1776 }
1777 name_len = strlen (name);
1778 /* MS docs says an environment variable cannot be longer than 32K. */
1779 if (name_len > 32767)
1780 {
1781 errno = ENOMEM;
1782 return 0;
1783 }
1784 /* It is safe to use 'alloca' with 32K size, since the stack is at
1785 least 2MB, and we set it to 8MB in the link command line. */
1786 var = alloca (name_len + 2);
1787 strncpy (var, name, name_len);
1788 var[name_len++] = '=';
1789 var[name_len] = '\0';
1790 return _putenv (var);
1791}
1792
1793/* MS _putenv doesn't support removing a variable when the argument
1794 does not include the '=' character, so we fix that here. */
1795int
1796sys_putenv (char *str)
1797{
1798 const char *const name_end = strchr (str, '=');
1799
1800 if (name_end == NULL)
1801 {
1802 /* Remove the variable from the environment. */
1803 return unsetenv (str);
1804 }
1805
1806 return _putenv (str);
1807}
1808
1809#define REG_ROOT "SOFTWARE\\GNU\\Emacs"
1810
1811LPBYTE
1812w32_get_resource (char *key, LPDWORD lpdwtype)
1813{
1814 LPBYTE lpvalue;
1815 HKEY hrootkey = NULL;
1816 DWORD cbData;
1817
1818 /* Check both the current user and the local machine to see if
1819 we have any resources. */
1820
1821 if (RegOpenKeyEx (HKEY_CURRENT_USER, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS)
1822 {
1823 lpvalue = NULL;
1824
1825 if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS
1826 && (lpvalue = xmalloc (cbData)) != NULL
1827 && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS)
1828 {
1829 RegCloseKey (hrootkey);
1830 return (lpvalue);
1831 }
1832
1833 xfree (lpvalue);
1834
1835 RegCloseKey (hrootkey);
1836 }
1837
1838 if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS)
1839 {
1840 lpvalue = NULL;
1841
1842 if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS
1843 && (lpvalue = xmalloc (cbData)) != NULL
1844 && RegQueryValueEx (hrootkey, key, NULL, lpdwtype, lpvalue, &cbData) == ERROR_SUCCESS)
1845 {
1846 RegCloseKey (hrootkey);
1847 return (lpvalue);
1848 }
1849
1850 xfree (lpvalue);
1851
1852 RegCloseKey (hrootkey);
1853 }
1854
1855 return (NULL);
1856}
1857
1858char *get_emacs_configuration (void);
1859
1860void
1861init_environment (char ** argv)
1862{
1863 static const char * const tempdirs[] = {
1864 "$TMPDIR", "$TEMP", "$TMP", "c:/"
1865 };
1866
1867 int i;
1868
1869 const int imax = sizeof (tempdirs) / sizeof (tempdirs[0]);
1870
1871 /* Make sure they have a usable $TMPDIR. Many Emacs functions use
1872 temporary files and assume "/tmp" if $TMPDIR is unset, which
1873 will break on DOS/Windows. Refuse to work if we cannot find
1874 a directory, not even "c:/", usable for that purpose. */
1875 for (i = 0; i < imax ; i++)
1876 {
1877 const char *tmp = tempdirs[i];
1878
1879 if (*tmp == '$')
1880 tmp = getenv (tmp + 1);
1881 /* Note that `access' can lie to us if the directory resides on a
1882 read-only filesystem, like CD-ROM or a write-protected floppy.
1883 The only way to be really sure is to actually create a file and
1884 see if it succeeds. But I think that's too much to ask. */
1885
1886 /* MSVCRT's _access crashes with D_OK. */
1887 if (tmp && faccessat (AT_FDCWD, tmp, D_OK, AT_EACCESS) == 0)
1888 {
1889 char * var = alloca (strlen (tmp) + 8);
1890 sprintf (var, "TMPDIR=%s", tmp);
1891 _putenv (strdup (var));
1892 break;
1893 }
1894 }
1895 if (i >= imax)
1896 cmd_error_internal
1897 (Fcons (Qerror,
1898 Fcons (build_string ("no usable temporary directories found!!"),
1899 Qnil)),
1900 "While setting TMPDIR: ");
1901
1902 /* Check for environment variables and use registry settings if they
1903 don't exist. Fallback on default values where applicable. */
1904 {
1905 int i;
1906 LPBYTE lpval;
1907 DWORD dwType;
1908 char locale_name[32];
1909 char default_home[MAX_PATH];
1910 int appdata = 0;
1911
1912 static const struct env_entry
1913 {
1914 char * name;
1915 char * def_value;
1916 } dflt_envvars[] =
1917 {
1918 /* If the default value is NULL, we will use the value from the
1919 outside environment or the Registry, but will not push the
1920 variable into the Emacs environment if it is defined neither
1921 in the Registry nor in the outside environment. */
1922 {"HOME", "C:/"},
1923 {"PRELOAD_WINSOCK", NULL},
1924 {"emacs_dir", "C:/emacs"},
1925 {"EMACSLOADPATH", NULL},
1926 {"SHELL", "%emacs_dir%/bin/cmdproxy.exe"},
1927 {"EMACSDATA", NULL},
1928 {"EMACSPATH", NULL},
1929 {"INFOPATH", NULL},
1930 {"EMACSDOC", NULL},
1931 {"TERM", "cmd"},
1932 {"LANG", NULL},
1933 };
1934
1935#define N_ENV_VARS sizeof (dflt_envvars)/sizeof (dflt_envvars[0])
1936
1937 /* We need to copy dflt_envvars[] and work on the copy because we
1938 don't want the dumped Emacs to inherit the values of
1939 environment variables we saw during dumping (which could be on
1940 a different system). The defaults above must be left intact. */
1941 struct env_entry env_vars[N_ENV_VARS];
1942
1943 for (i = 0; i < N_ENV_VARS; i++)
1944 env_vars[i] = dflt_envvars[i];
1945
1946 /* For backwards compatibility, check if a .emacs file exists in C:/
1947 If not, then we can try to default to the appdata directory under the
1948 user's profile, which is more likely to be writable. */
1949 if (!check_existing ("C:/.emacs"))
1950 {
1951 HRESULT profile_result;
1952 /* Dynamically load ShGetFolderPath, as it won't exist on versions
1953 of Windows 95 and NT4 that have not been updated to include
1954 MSIE 5. */
1955 ShGetFolderPath_fn get_folder_path;
1956 get_folder_path = (ShGetFolderPath_fn)
1957 GetProcAddress (GetModuleHandle ("shell32.dll"), "SHGetFolderPathA");
1958
1959 if (get_folder_path != NULL)
1960 {
1961 profile_result = get_folder_path (NULL, CSIDL_APPDATA, NULL,
1962 0, default_home);
1963
1964 /* If we can't get the appdata dir, revert to old behavior. */
1965 if (profile_result == S_OK)
1966 {
1967 env_vars[0].def_value = default_home;
1968 appdata = 1;
1969 }
1970 }
1971 }
1972
1973 /* Get default locale info and use it for LANG. */
1974 if (GetLocaleInfo (LOCALE_USER_DEFAULT,
1975 LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP,
1976 locale_name, sizeof (locale_name)))
1977 {
1978 for (i = 0; i < N_ENV_VARS; i++)
1979 {
1980 if (strcmp (env_vars[i].name, "LANG") == 0)
1981 {
1982 env_vars[i].def_value = locale_name;
1983 break;
1984 }
1985 }
1986 }
1987
1988#define SET_ENV_BUF_SIZE (4 * MAX_PATH) /* to cover EMACSLOADPATH */
1989
1990 /* Treat emacs_dir specially: set it unconditionally based on our
1991 location. */
1992 {
1993 char *p;
1994 char modname[MAX_PATH];
1995
1996 if (!GetModuleFileName (NULL, modname, MAX_PATH))
1997 emacs_abort ();
1998 if ((p = strrchr (modname, '\\')) == NULL)
1999 emacs_abort ();
2000 *p = 0;
2001
2002 if ((p = strrchr (modname, '\\')) && xstrcasecmp (p, "\\bin") == 0)
2003 {
2004 char buf[SET_ENV_BUF_SIZE];
2005
2006 *p = 0;
2007 for (p = modname; *p; p++)
2008 if (*p == '\\') *p = '/';
2009
2010 _snprintf (buf, sizeof (buf)-1, "emacs_dir=%s", modname);
2011 _putenv (strdup (buf));
2012 }
2013 /* Handle running emacs from the build directory: src/oo-spd/i386/ */
2014
2015 /* FIXME: should use substring of get_emacs_configuration ().
2016 But I don't think the Windows build supports alpha, mips etc
2017 anymore, so have taken the easy option for now. */
2018 else if (p && (xstrcasecmp (p, "\\i386") == 0
2019 || xstrcasecmp (p, "\\AMD64") == 0))
2020 {
2021 *p = 0;
2022 p = strrchr (modname, '\\');
2023 if (p != NULL)
2024 {
2025 *p = 0;
2026 p = strrchr (modname, '\\');
2027 if (p && xstrcasecmp (p, "\\src") == 0)
2028 {
2029 char buf[SET_ENV_BUF_SIZE];
2030
2031 *p = 0;
2032 for (p = modname; *p; p++)
2033 if (*p == '\\') *p = '/';
2034
2035 _snprintf (buf, sizeof (buf)-1, "emacs_dir=%s", modname);
2036 _putenv (strdup (buf));
2037 }
2038 }
2039 }
2040 }
2041
2042 for (i = 0; i < N_ENV_VARS; i++)
2043 {
2044 if (!getenv (env_vars[i].name))
2045 {
2046 int dont_free = 0;
2047
2048 if ((lpval = w32_get_resource (env_vars[i].name, &dwType)) == NULL
2049 /* Also ignore empty environment variables. */
2050 || *lpval == 0)
2051 {
2052 xfree (lpval);
2053 lpval = env_vars[i].def_value;
2054 dwType = REG_EXPAND_SZ;
2055 dont_free = 1;
2056 if (!strcmp (env_vars[i].name, "HOME") && !appdata)
2057 Vdelayed_warnings_list
2058 = Fcons (listn (CONSTYPE_HEAP, 2,
2059 intern ("initialization"),
2060 build_string ("Setting HOME to C:\\ by default is deprecated")),
2061 Vdelayed_warnings_list);
2062 }
2063
2064 if (lpval)
2065 {
2066 char buf1[SET_ENV_BUF_SIZE], buf2[SET_ENV_BUF_SIZE];
2067
2068 if (dwType == REG_EXPAND_SZ)
2069 ExpandEnvironmentStrings ((LPSTR) lpval, buf1, sizeof (buf1));
2070 else if (dwType == REG_SZ)
2071 strcpy (buf1, lpval);
2072 if (dwType == REG_EXPAND_SZ || dwType == REG_SZ)
2073 {
2074 _snprintf (buf2, sizeof (buf2)-1, "%s=%s", env_vars[i].name,
2075 buf1);
2076 _putenv (strdup (buf2));
2077 }
2078
2079 if (!dont_free)
2080 xfree (lpval);
2081 }
2082 }
2083 }
2084 }
2085
2086 /* Rebuild system configuration to reflect invoking system. */
2087 Vsystem_configuration = build_string (EMACS_CONFIGURATION);
2088
2089 /* Another special case: on NT, the PATH variable is actually named
2090 "Path" although cmd.exe (perhaps NT itself) arranges for
2091 environment variable lookup and setting to be case insensitive.
2092 However, Emacs assumes a fully case sensitive environment, so we
2093 need to change "Path" to "PATH" to match the expectations of
2094 various elisp packages. We do this by the sneaky method of
2095 modifying the string in the C runtime environ entry.
2096
2097 The same applies to COMSPEC. */
2098 {
2099 char ** envp;
2100
2101 for (envp = environ; *envp; envp++)
2102 if (_strnicmp (*envp, "PATH=", 5) == 0)
2103 memcpy (*envp, "PATH=", 5);
2104 else if (_strnicmp (*envp, "COMSPEC=", 8) == 0)
2105 memcpy (*envp, "COMSPEC=", 8);
2106 }
2107
2108 /* Remember the initial working directory for getcwd. */
2109 /* FIXME: Do we need to resolve possible symlinks in startup_dir?
2110 Does it matter anywhere in Emacs? */
2111 if (!GetCurrentDirectory (MAXPATHLEN, startup_dir))
2112 emacs_abort ();
2113
2114 {
2115 static char modname[MAX_PATH];
2116
2117 if (!GetModuleFileName (NULL, modname, MAX_PATH))
2118 emacs_abort ();
2119 argv[0] = modname;
2120 }
2121
2122 /* Determine if there is a middle mouse button, to allow parse_button
2123 to decide whether right mouse events should be mouse-2 or
2124 mouse-3. */
2125 w32_num_mouse_buttons = GetSystemMetrics (SM_CMOUSEBUTTONS);
2126
2127 init_user_info ();
2128}
2129
2130/* Called from expand-file-name when default-directory is not a string. */
2131
2132char *
2133emacs_root_dir (void)
2134{
2135 static char root_dir[FILENAME_MAX];
2136 const char *p;
2137
2138 p = getenv ("emacs_dir");
2139 if (p == NULL)
2140 emacs_abort ();
2141 strcpy (root_dir, p);
2142 root_dir[parse_root (root_dir, NULL)] = '\0';
2143 dostounix_filename (root_dir);
2144 return root_dir;
2145}
2146
2147/* We don't have scripts to automatically determine the system configuration
2148 for Emacs before it's compiled, and we don't want to have to make the
2149 user enter it, so we define EMACS_CONFIGURATION to invoke this runtime
2150 routine. */
2151
2152char *
2153get_emacs_configuration (void)
2154{
2155 char *arch, *oem, *os;
2156 int build_num;
2157 static char configuration_buffer[32];
2158
2159 /* Determine the processor type. */
2160 switch (get_processor_type ())
2161 {
2162
2163#ifdef PROCESSOR_INTEL_386
2164 case PROCESSOR_INTEL_386:
2165 case PROCESSOR_INTEL_486:
2166 case PROCESSOR_INTEL_PENTIUM:
2167#ifdef _WIN64
2168 arch = "amd64";
2169#else
2170 arch = "i386";
2171#endif
2172 break;
2173#endif
2174#ifdef PROCESSOR_AMD_X8664
2175 case PROCESSOR_AMD_X8664:
2176 arch = "amd64";
2177 break;
2178#endif
2179
2180#ifdef PROCESSOR_MIPS_R2000
2181 case PROCESSOR_MIPS_R2000:
2182 case PROCESSOR_MIPS_R3000:
2183 case PROCESSOR_MIPS_R4000:
2184 arch = "mips";
2185 break;
2186#endif
2187
2188#ifdef PROCESSOR_ALPHA_21064
2189 case PROCESSOR_ALPHA_21064:
2190 arch = "alpha";
2191 break;
2192#endif
2193
2194 default:
2195 arch = "unknown";
2196 break;
2197 }
2198
2199 /* Use the OEM field to reflect the compiler/library combination. */
2200#ifdef _MSC_VER
2201#define COMPILER_NAME "msvc"
2202#else
2203#ifdef __GNUC__
2204#define COMPILER_NAME "mingw"
2205#else
2206#define COMPILER_NAME "unknown"
2207#endif
2208#endif
2209 oem = COMPILER_NAME;
2210
2211 switch (osinfo_cache.dwPlatformId) {
2212 case VER_PLATFORM_WIN32_NT:
2213 os = "nt";
2214 build_num = osinfo_cache.dwBuildNumber;
2215 break;
2216 case VER_PLATFORM_WIN32_WINDOWS:
2217 if (osinfo_cache.dwMinorVersion == 0) {
2218 os = "windows95";
2219 } else {
2220 os = "windows98";
2221 }
2222 build_num = LOWORD (osinfo_cache.dwBuildNumber);
2223 break;
2224 case VER_PLATFORM_WIN32s:
2225 /* Not supported, should not happen. */
2226 os = "windows32s";
2227 build_num = LOWORD (osinfo_cache.dwBuildNumber);
2228 break;
2229 default:
2230 os = "unknown";
2231 build_num = 0;
2232 break;
2233 }
2234
2235 if (osinfo_cache.dwPlatformId == VER_PLATFORM_WIN32_NT) {
2236 sprintf (configuration_buffer, "%s-%s-%s%d.%d.%d", arch, oem, os,
2237 get_w32_major_version (), get_w32_minor_version (), build_num);
2238 } else {
2239 sprintf (configuration_buffer, "%s-%s-%s.%d", arch, oem, os, build_num);
2240 }
2241
2242 return configuration_buffer;
2243}
2244
2245char *
2246get_emacs_configuration_options (void)
2247{
2248 static char *options_buffer;
2249 char cv[32]; /* Enough for COMPILER_VERSION. */
2250 char *options[] = {
2251 cv, /* To be filled later. */
2252#ifdef EMACSDEBUG
2253 " --no-opt",
2254#endif
2255#ifdef ENABLE_CHECKING
2256 " --enable-checking",
2257#endif
2258 /* configure.bat already sets USER_CFLAGS and USER_LDFLAGS
2259 with a starting space to save work here. */
2260#ifdef USER_CFLAGS
2261 " --cflags", USER_CFLAGS,
2262#endif
2263#ifdef USER_LDFLAGS
2264 " --ldflags", USER_LDFLAGS,
2265#endif
2266 NULL
2267 };
2268 size_t size = 0;
2269 int i;
2270
2271/* Work out the effective configure options for this build. */
2272#ifdef _MSC_VER
2273#define COMPILER_VERSION "--with-msvc (%d.%02d)", _MSC_VER / 100, _MSC_VER % 100
2274#else
2275#ifdef __GNUC__
2276#define COMPILER_VERSION "--with-gcc (%d.%d)", __GNUC__, __GNUC_MINOR__
2277#else
2278#define COMPILER_VERSION ""
2279#endif
2280#endif
2281
2282 if (_snprintf (cv, sizeof (cv) - 1, COMPILER_VERSION) < 0)
2283 return "Error: not enough space for compiler version";
2284 cv[sizeof (cv) - 1] = '\0';
2285
2286 for (i = 0; options[i]; i++)
2287 size += strlen (options[i]);
2288
2289 options_buffer = xmalloc (size + 1);
2290 options_buffer[0] = '\0';
2291
2292 for (i = 0; options[i]; i++)
2293 strcat (options_buffer, options[i]);
2294
2295 return options_buffer;
2296}
2297
2298
2299#include <sys/timeb.h>
2300
2301/* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */
2302void
2303gettimeofday (struct timeval *tv, struct timezone *tz)
2304{
2305 struct _timeb tb;
2306 _ftime (&tb);
2307
2308 tv->tv_sec = tb.time;
2309 tv->tv_usec = tb.millitm * 1000L;
2310 /* Implementation note: _ftime sometimes doesn't update the dstflag
2311 according to the new timezone when the system timezone is
2312 changed. We could fix that by using GetSystemTime and
2313 GetTimeZoneInformation, but that doesn't seem necessary, since
2314 Emacs always calls gettimeofday with the 2nd argument NULL (see
2315 current_emacs_time). */
2316 if (tz)
2317 {
2318 tz->tz_minuteswest = tb.timezone; /* minutes west of Greenwich */
2319 tz->tz_dsttime = tb.dstflag; /* type of dst correction */
2320 }
2321}
2322
2323/* Emulate fdutimens. */
2324
2325/* Set the access and modification time stamps of FD (a.k.a. FILE) to be
2326 TIMESPEC[0] and TIMESPEC[1], respectively.
2327 FD must be either negative -- in which case it is ignored --
2328 or a file descriptor that is open on FILE.
2329 If FD is nonnegative, then FILE can be NULL, which means
2330 use just futimes instead of utimes.
2331 If TIMESPEC is null, FAIL.
2332 Return 0 on success, -1 (setting errno) on failure. */
2333
2334int
2335fdutimens (int fd, char const *file, struct timespec const timespec[2])
2336{
2337 struct _utimbuf ut;
2338
2339 if (!timespec)
2340 {
2341 errno = ENOSYS;
2342 return -1;
2343 }
2344 if (fd < 0 && !file)
2345 {
2346 errno = EBADF;
2347 return -1;
2348 }
2349 ut.actime = timespec[0].tv_sec;
2350 ut.modtime = timespec[1].tv_sec;
2351 if (fd >= 0)
2352 return _futime (fd, &ut);
2353 else
2354 return _utime (file, &ut);
2355}
2356
2357
2358/* ------------------------------------------------------------------------- */
2359/* IO support and wrapper functions for the Windows API. */
2360/* ------------------------------------------------------------------------- */
2361
2362/* Place a wrapper around the MSVC version of ctime. It returns NULL
2363 on network directories, so we handle that case here.
2364 (Ulrich Leodolter, 1/11/95). */
2365char *
2366sys_ctime (const time_t *t)
2367{
2368 char *str = (char *) ctime (t);
2369 return (str ? str : "Sun Jan 01 00:00:00 1970");
2370}
2371
2372/* Emulate sleep...we could have done this with a define, but that
2373 would necessitate including windows.h in the files that used it.
2374 This is much easier. */
2375void
2376sys_sleep (int seconds)
2377{
2378 Sleep (seconds * 1000);
2379}
2380
2381/* Internal MSVC functions for low-level descriptor munging */
2382extern int __cdecl _set_osfhnd (int fd, long h);
2383extern int __cdecl _free_osfhnd (int fd);
2384
2385/* parallel array of private info on file handles */
2386filedesc fd_info [ MAXDESC ];
2387
2388typedef struct volume_info_data {
2389 struct volume_info_data * next;
2390
2391 /* time when info was obtained */
2392 DWORD timestamp;
2393
2394 /* actual volume info */
2395 char * root_dir;
2396 DWORD serialnum;
2397 DWORD maxcomp;
2398 DWORD flags;
2399 char * name;
2400 char * type;
2401} volume_info_data;
2402
2403/* Global referenced by various functions. */
2404static volume_info_data volume_info;
2405
2406/* Vector to indicate which drives are local and fixed (for which cached
2407 data never expires). */
2408static BOOL fixed_drives[26];
2409
2410/* Consider cached volume information to be stale if older than 10s,
2411 at least for non-local drives. Info for fixed drives is never stale. */
2412#define DRIVE_INDEX( c ) ( (c) <= 'Z' ? (c) - 'A' : (c) - 'a' )
2413#define VOLINFO_STILL_VALID( root_dir, info ) \
2414 ( ( isalpha (root_dir[0]) && \
2415 fixed_drives[ DRIVE_INDEX (root_dir[0]) ] ) \
2416 || GetTickCount () - info->timestamp < 10000 )
2417
2418/* Cache support functions. */
2419
2420/* Simple linked list with linear search is sufficient. */
2421static volume_info_data *volume_cache = NULL;
2422
2423static volume_info_data *
2424lookup_volume_info (char * root_dir)
2425{
2426 volume_info_data * info;
2427
2428 for (info = volume_cache; info; info = info->next)
2429 if (xstrcasecmp (info->root_dir, root_dir) == 0)
2430 break;
2431 return info;
2432}
2433
2434static void
2435add_volume_info (char * root_dir, volume_info_data * info)
2436{
2437 info->root_dir = xstrdup (root_dir);
2438 info->next = volume_cache;
2439 volume_cache = info;
2440}
2441
2442
2443/* Wrapper for GetVolumeInformation, which uses caching to avoid
2444 performance penalty (~2ms on 486 for local drives, 7.5ms for local
2445 cdrom drive, ~5-10ms or more for remote drives on LAN). */
2446static volume_info_data *
2447GetCachedVolumeInformation (char * root_dir)
2448{
2449 volume_info_data * info;
2450 char default_root[ MAX_PATH ];
2451
2452 /* NULL for root_dir means use root from current directory. */
2453 if (root_dir == NULL)
2454 {
2455 if (GetCurrentDirectory (MAX_PATH, default_root) == 0)
2456 return NULL;
2457 parse_root (default_root, &root_dir);
2458 *root_dir = 0;
2459 root_dir = default_root;
2460 }
2461
2462 /* Local fixed drives can be cached permanently. Removable drives
2463 cannot be cached permanently, since the volume name and serial
2464 number (if nothing else) can change. Remote drives should be
2465 treated as if they are removable, since there is no sure way to
2466 tell whether they are or not. Also, the UNC association of drive
2467 letters mapped to remote volumes can be changed at any time (even
2468 by other processes) without notice.
2469
2470 As a compromise, so we can benefit from caching info for remote
2471 volumes, we use a simple expiry mechanism to invalidate cache
2472 entries that are more than ten seconds old. */
2473
2474#if 0
2475 /* No point doing this, because WNetGetConnection is even slower than
2476 GetVolumeInformation, consistently taking ~50ms on a 486 (FWIW,
2477 GetDriveType is about the only call of this type which does not
2478 involve network access, and so is extremely quick). */
2479
2480 /* Map drive letter to UNC if remote. */
2481 if (isalpha (root_dir[0]) && !fixed[DRIVE_INDEX (root_dir[0])])
2482 {
2483 char remote_name[ 256 ];
2484 char drive[3] = { root_dir[0], ':' };
2485
2486 if (WNetGetConnection (drive, remote_name, sizeof (remote_name))
2487 == NO_ERROR)
2488 /* do something */ ;
2489 }
2490#endif
2491
2492 info = lookup_volume_info (root_dir);
2493
2494 if (info == NULL || ! VOLINFO_STILL_VALID (root_dir, info))
2495 {
2496 char name[ 256 ];
2497 DWORD serialnum;
2498 DWORD maxcomp;
2499 DWORD flags;
2500 char type[ 256 ];
2501
2502 /* Info is not cached, or is stale. */
2503 if (!GetVolumeInformation (root_dir,
2504 name, sizeof (name),
2505 &serialnum,
2506 &maxcomp,
2507 &flags,
2508 type, sizeof (type)))
2509 return NULL;
2510
2511 /* Cache the volume information for future use, overwriting existing
2512 entry if present. */
2513 if (info == NULL)
2514 {
2515 info = xmalloc (sizeof (volume_info_data));
2516 add_volume_info (root_dir, info);
2517 }
2518 else
2519 {
2520 xfree (info->name);
2521 xfree (info->type);
2522 }
2523
2524 info->name = xstrdup (name);
2525 info->serialnum = serialnum;
2526 info->maxcomp = maxcomp;
2527 info->flags = flags;
2528 info->type = xstrdup (type);
2529 info->timestamp = GetTickCount ();
2530 }
2531
2532 return info;
2533}
2534
2535/* Get information on the volume where NAME is held; set path pointer to
2536 start of pathname in NAME (past UNC header\volume header if present),
2537 if pPath is non-NULL.
2538
2539 Note: if NAME includes symlinks, the information is for the volume
2540 of the symlink, not of its target. That's because, even though
2541 GetVolumeInformation returns information about the symlink target
2542 of its argument, we only pass the root directory to
2543 GetVolumeInformation, not the full NAME. */
2544static int
2545get_volume_info (const char * name, const char ** pPath)
2546{
2547 char temp[MAX_PATH];
2548 char *rootname = NULL; /* default to current volume */
2549 volume_info_data * info;
2550
2551 if (name == NULL)
2552 return FALSE;
2553
2554 /* Find the root name of the volume if given. */
2555 if (isalpha (name[0]) && name[1] == ':')
2556 {
2557 rootname = temp;
2558 temp[0] = *name++;
2559 temp[1] = *name++;
2560 temp[2] = '\\';
2561 temp[3] = 0;
2562 }
2563 else if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1]))
2564 {
2565 char *str = temp;
2566 int slashes = 4;
2567 rootname = temp;
2568 do
2569 {
2570 if (IS_DIRECTORY_SEP (*name) && --slashes == 0)
2571 break;
2572 *str++ = *name++;
2573 }
2574 while ( *name );
2575
2576 *str++ = '\\';
2577 *str = 0;
2578 }
2579
2580 if (pPath)
2581 *pPath = name;
2582
2583 info = GetCachedVolumeInformation (rootname);
2584 if (info != NULL)
2585 {
2586 /* Set global referenced by other functions. */
2587 volume_info = *info;
2588 return TRUE;
2589 }
2590 return FALSE;
2591}
2592
2593/* Determine if volume is FAT format (ie. only supports short 8.3
2594 names); also set path pointer to start of pathname in name, if
2595 pPath is non-NULL. */
2596static int
2597is_fat_volume (const char * name, const char ** pPath)
2598{
2599 if (get_volume_info (name, pPath))
2600 return (volume_info.maxcomp == 12);
2601 return FALSE;
2602}
2603
2604/* Map filename to a valid 8.3 name if necessary.
2605 The result is a pointer to a static buffer, so CAVEAT EMPTOR! */
2606const char *
2607map_w32_filename (const char * name, const char ** pPath)
2608{
2609 static char shortname[MAX_PATH];
2610 char * str = shortname;
2611 char c;
2612 char * path;
2613 const char * save_name = name;
2614
2615 if (strlen (name) >= MAX_PATH)
2616 {
2617 /* Return a filename which will cause callers to fail. */
2618 strcpy (shortname, "?");
2619 return shortname;
2620 }
2621
2622 if (is_fat_volume (name, (const char **)&path)) /* truncate to 8.3 */
2623 {
2624 register int left = 8; /* maximum number of chars in part */
2625 register int extn = 0; /* extension added? */
2626 register int dots = 2; /* maximum number of dots allowed */
2627
2628 while (name < path)
2629 *str++ = *name++; /* skip past UNC header */
2630
2631 while ((c = *name++))
2632 {
2633 switch ( c )
2634 {
2635 case ':':
2636 case '\\':
2637 case '/':
2638 *str++ = (c == ':' ? ':' : '\\');
2639 extn = 0; /* reset extension flags */
2640 dots = 2; /* max 2 dots */
2641 left = 8; /* max length 8 for main part */
2642 break;
2643 case '.':
2644 if ( dots )
2645 {
2646 /* Convert path components of the form .xxx to _xxx,
2647 but leave . and .. as they are. This allows .emacs
2648 to be read as _emacs, for example. */
2649
2650 if (! *name ||
2651 *name == '.' ||
2652 IS_DIRECTORY_SEP (*name))
2653 {
2654 *str++ = '.';
2655 dots--;
2656 }
2657 else
2658 {
2659 *str++ = '_';
2660 left--;
2661 dots = 0;
2662 }
2663 }
2664 else if ( !extn )
2665 {
2666 *str++ = '.';
2667 extn = 1; /* we've got an extension */
2668 left = 3; /* 3 chars in extension */
2669 }
2670 else
2671 {
2672 /* any embedded dots after the first are converted to _ */
2673 *str++ = '_';
2674 }
2675 break;
2676 case '~':
2677 case '#': /* don't lose these, they're important */
2678 if ( ! left )
2679 str[-1] = c; /* replace last character of part */
2680 /* FALLTHRU */
2681 default:
2682 if ( left )
2683 {
2684 *str++ = tolower (c); /* map to lower case (looks nicer) */
2685 left--;
2686 dots = 0; /* started a path component */
2687 }
2688 break;
2689 }
2690 }
2691 *str = '\0';
2692 }
2693 else
2694 {
2695 strcpy (shortname, name);
2696 unixtodos_filename (shortname);
2697 }
2698
2699 if (pPath)
2700 *pPath = shortname + (path - save_name);
2701
2702 return shortname;
2703}
2704
2705static int
2706is_exec (const char * name)
2707{
2708 char * p = strrchr (name, '.');
2709 return
2710 (p != NULL
2711 && (xstrcasecmp (p, ".exe") == 0 ||
2712 xstrcasecmp (p, ".com") == 0 ||
2713 xstrcasecmp (p, ".bat") == 0 ||
2714 xstrcasecmp (p, ".cmd") == 0));
2715}
2716
2717/* Emulate the Unix directory procedures opendir, closedir,
2718 and readdir. We can't use the procedures supplied in sysdep.c,
2719 so we provide them here. */
2720
2721struct dirent dir_static; /* simulated directory contents */
2722static HANDLE dir_find_handle = INVALID_HANDLE_VALUE;
2723static int dir_is_fat;
2724static char dir_pathname[MAXPATHLEN+1];
2725static WIN32_FIND_DATA dir_find_data;
2726
2727/* Support shares on a network resource as subdirectories of a read-only
2728 root directory. */
2729static HANDLE wnet_enum_handle = INVALID_HANDLE_VALUE;
2730static HANDLE open_unc_volume (const char *);
2731static char *read_unc_volume (HANDLE, char *, int);
2732static void close_unc_volume (HANDLE);
2733
2734DIR *
2735opendir (char *filename)
2736{
2737 DIR *dirp;
2738
2739 /* Opening is done by FindFirstFile. However, a read is inherent to
2740 this operation, so we defer the open until read time. */
2741
2742 if (dir_find_handle != INVALID_HANDLE_VALUE)
2743 return NULL;
2744 if (wnet_enum_handle != INVALID_HANDLE_VALUE)
2745 return NULL;
2746
2747 /* Note: We don't support traversal of UNC volumes via symlinks.
2748 Doing so would mean punishing 99.99% of use cases by resolving
2749 all the possible symlinks in FILENAME, recursively. */
2750 if (is_unc_volume (filename))
2751 {
2752 wnet_enum_handle = open_unc_volume (filename);
2753 if (wnet_enum_handle == INVALID_HANDLE_VALUE)
2754 return NULL;
2755 }
2756
2757 if (!(dirp = (DIR *) malloc (sizeof (DIR))))
2758 return NULL;
2759
2760 dirp->dd_fd = 0;
2761 dirp->dd_loc = 0;
2762 dirp->dd_size = 0;
2763
2764 strncpy (dir_pathname, map_w32_filename (filename, NULL), MAXPATHLEN);
2765 dir_pathname[MAXPATHLEN] = '\0';
2766 /* Note: We don't support symlinks to file names on FAT volumes.
2767 Doing so would mean punishing 99.99% of use cases by resolving
2768 all the possible symlinks in FILENAME, recursively. */
2769 dir_is_fat = is_fat_volume (filename, NULL);
2770
2771 return dirp;
2772}
2773
2774void
2775closedir (DIR *dirp)
2776{
2777 /* If we have a find-handle open, close it. */
2778 if (dir_find_handle != INVALID_HANDLE_VALUE)
2779 {
2780 FindClose (dir_find_handle);
2781 dir_find_handle = INVALID_HANDLE_VALUE;
2782 }
2783 else if (wnet_enum_handle != INVALID_HANDLE_VALUE)
2784 {
2785 close_unc_volume (wnet_enum_handle);
2786 wnet_enum_handle = INVALID_HANDLE_VALUE;
2787 }
2788 xfree ((char *) dirp);
2789}
2790
2791struct dirent *
2792readdir (DIR *dirp)
2793{
2794 int downcase = !NILP (Vw32_downcase_file_names);
2795
2796 if (wnet_enum_handle != INVALID_HANDLE_VALUE)
2797 {
2798 if (!read_unc_volume (wnet_enum_handle,
2799 dir_find_data.cFileName,
2800 MAX_PATH))
2801 return NULL;
2802 }
2803 /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */
2804 else if (dir_find_handle == INVALID_HANDLE_VALUE)
2805 {
2806 char filename[MAXNAMLEN + 3];
2807 int ln;
2808
2809 strcpy (filename, dir_pathname);
2810 ln = strlen (filename) - 1;
2811 if (!IS_DIRECTORY_SEP (filename[ln]))
2812 strcat (filename, "\\");
2813 strcat (filename, "*");
2814
2815 /* Note: No need to resolve symlinks in FILENAME, because
2816 FindFirst opens the directory that is the target of a
2817 symlink. */
2818 dir_find_handle = FindFirstFile (filename, &dir_find_data);
2819
2820 if (dir_find_handle == INVALID_HANDLE_VALUE)
2821 return NULL;
2822 }
2823 else
2824 {
2825 if (!FindNextFile (dir_find_handle, &dir_find_data))
2826 return NULL;
2827 }
2828
2829 /* Emacs never uses this value, so don't bother making it match
2830 value returned by stat(). */
2831 dir_static.d_ino = 1;
2832
2833 strcpy (dir_static.d_name, dir_find_data.cFileName);
2834
2835 /* If the file name in cFileName[] includes `?' characters, it means
2836 the original file name used characters that cannot be represented
2837 by the current ANSI codepage. To avoid total lossage, retrieve
2838 the short 8+3 alias of the long file name. */
2839 if (_mbspbrk (dir_static.d_name, "?"))
2840 {
2841 strcpy (dir_static.d_name, dir_find_data.cAlternateFileName);
2842 downcase = 1; /* 8+3 aliases are returned in all caps */
2843 }
2844 dir_static.d_namlen = strlen (dir_static.d_name);
2845 dir_static.d_reclen = sizeof (struct dirent) - MAXNAMLEN + 3 +
2846 dir_static.d_namlen - dir_static.d_namlen % 4;
2847
2848 /* If the file name in cFileName[] includes `?' characters, it means
2849 the original file name used characters that cannot be represented
2850 by the current ANSI codepage. To avoid total lossage, retrieve
2851 the short 8+3 alias of the long file name. */
2852 if (_mbspbrk (dir_find_data.cFileName, "?"))
2853 {
2854 strcpy (dir_static.d_name, dir_find_data.cAlternateFileName);
2855 /* 8+3 aliases are returned in all caps, which could break
2856 various alists that look at filenames' extensions. */
2857 downcase = 1;
2858 }
2859 else
2860 strcpy (dir_static.d_name, dir_find_data.cFileName);
2861 dir_static.d_namlen = strlen (dir_static.d_name);
2862 if (dir_is_fat)
2863 _strlwr (dir_static.d_name);
2864 else if (downcase)
2865 {
2866 register char *p;
2867 for (p = dir_static.d_name; *p; p++)
2868 if (*p >= 'a' && *p <= 'z')
2869 break;
2870 if (!*p)
2871 _strlwr (dir_static.d_name);
2872 }
2873
2874 return &dir_static;
2875}
2876
2877static HANDLE
2878open_unc_volume (const char *path)
2879{
2880 NETRESOURCE nr;
2881 HANDLE henum;
2882 int result;
2883
2884 nr.dwScope = RESOURCE_GLOBALNET;
2885 nr.dwType = RESOURCETYPE_DISK;
2886 nr.dwDisplayType = RESOURCEDISPLAYTYPE_SERVER;
2887 nr.dwUsage = RESOURCEUSAGE_CONTAINER;
2888 nr.lpLocalName = NULL;
2889 nr.lpRemoteName = (LPSTR)map_w32_filename (path, NULL);
2890 nr.lpComment = NULL;
2891 nr.lpProvider = NULL;
2892
2893 result = WNetOpenEnum (RESOURCE_GLOBALNET, RESOURCETYPE_DISK,
2894 RESOURCEUSAGE_CONNECTABLE, &nr, &henum);
2895
2896 if (result == NO_ERROR)
2897 return henum;
2898 else
2899 return INVALID_HANDLE_VALUE;
2900}
2901
2902static char *
2903read_unc_volume (HANDLE henum, char *readbuf, int size)
2904{
2905 DWORD count;
2906 int result;
2907 DWORD bufsize = 512;
2908 char *buffer;
2909 char *ptr;
2910
2911 count = 1;
2912 buffer = alloca (bufsize);
2913 result = WNetEnumResource (henum, &count, buffer, &bufsize);
2914 if (result != NO_ERROR)
2915 return NULL;
2916
2917 /* WNetEnumResource returns \\resource\share...skip forward to "share". */
2918 ptr = ((LPNETRESOURCE) buffer)->lpRemoteName;
2919 ptr += 2;
2920 while (*ptr && !IS_DIRECTORY_SEP (*ptr)) ptr++;
2921 ptr++;
2922
2923 strncpy (readbuf, ptr, size);
2924 return readbuf;
2925}
2926
2927static void
2928close_unc_volume (HANDLE henum)
2929{
2930 if (henum != INVALID_HANDLE_VALUE)
2931 WNetCloseEnum (henum);
2932}
2933
2934static DWORD
2935unc_volume_file_attributes (const char *path)
2936{
2937 HANDLE henum;
2938 DWORD attrs;
2939
2940 henum = open_unc_volume (path);
2941 if (henum == INVALID_HANDLE_VALUE)
2942 return -1;
2943
2944 attrs = FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_DIRECTORY;
2945
2946 close_unc_volume (henum);
2947
2948 return attrs;
2949}
2950
2951/* Ensure a network connection is authenticated. */
2952static void
2953logon_network_drive (const char *path)
2954{
2955 NETRESOURCE resource;
2956 char share[MAX_PATH];
2957 int i, n_slashes;
2958 char drive[4];
2959 UINT drvtype;
2960
2961 if (IS_DIRECTORY_SEP (path[0]) && IS_DIRECTORY_SEP (path[1]))
2962 drvtype = DRIVE_REMOTE;
2963 else if (path[0] == '\0' || path[1] != ':')
2964 drvtype = GetDriveType (NULL);
2965 else
2966 {
2967 drive[0] = path[0];
2968 drive[1] = ':';
2969 drive[2] = '\\';
2970 drive[3] = '\0';
2971 drvtype = GetDriveType (drive);
2972 }
2973
2974 /* Only logon to networked drives. */
2975 if (drvtype != DRIVE_REMOTE)
2976 return;
2977
2978 n_slashes = 2;
2979 strncpy (share, path, MAX_PATH);
2980 /* Truncate to just server and share name. */
2981 for (i = 2; i < MAX_PATH; i++)
2982 {
2983 if (IS_DIRECTORY_SEP (share[i]) && ++n_slashes > 3)
2984 {
2985 share[i] = '\0';
2986 break;
2987 }
2988 }
2989
2990 resource.dwType = RESOURCETYPE_DISK;
2991 resource.lpLocalName = NULL;
2992 resource.lpRemoteName = share;
2993 resource.lpProvider = NULL;
2994
2995 WNetAddConnection2 (&resource, NULL, NULL, CONNECT_INTERACTIVE);
2996}
2997
2998/* Emulate faccessat(2). */
2999int
3000faccessat (int dirfd, const char * path, int mode, int flags)
3001{
3002 DWORD attributes;
3003
3004 if (dirfd != AT_FDCWD
3005 && !(IS_DIRECTORY_SEP (path[0])
3006 || IS_DEVICE_SEP (path[1])))
3007 {
3008 errno = EBADF;
3009 return -1;
3010 }
3011
3012 /* MSVCRT implementation of 'access' doesn't recognize D_OK, and its
3013 newer versions blow up when passed D_OK. */
3014 path = map_w32_filename (path, NULL);
3015 /* If the last element of PATH is a symlink, we need to resolve it
3016 to get the attributes of its target file. Note: any symlinks in
3017 PATH elements other than the last one are transparently resolved
3018 by GetFileAttributes below. */
3019 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0
3020 && (flags & AT_SYMLINK_NOFOLLOW) == 0)
3021 path = chase_symlinks (path);
3022
3023 if ((attributes = GetFileAttributes (path)) == -1)
3024 {
3025 DWORD w32err = GetLastError ();
3026
3027 switch (w32err)
3028 {
3029 case ERROR_INVALID_NAME:
3030 case ERROR_BAD_PATHNAME:
3031 if (is_unc_volume (path))
3032 {
3033 attributes = unc_volume_file_attributes (path);
3034 if (attributes == -1)
3035 {
3036 errno = EACCES;
3037 return -1;
3038 }
3039 break;
3040 }
3041 /* FALLTHROUGH */
3042 case ERROR_FILE_NOT_FOUND:
3043 case ERROR_BAD_NETPATH:
3044 errno = ENOENT;
3045 break;
3046 default:
3047 errno = EACCES;
3048 break;
3049 }
3050 return -1;
3051 }
3052 if ((mode & X_OK) != 0
3053 && !(is_exec (path) || (attributes & FILE_ATTRIBUTE_DIRECTORY) != 0))
3054 {
3055 errno = EACCES;
3056 return -1;
3057 }
3058 if ((mode & W_OK) != 0 && (attributes & FILE_ATTRIBUTE_READONLY) != 0)
3059 {
3060 errno = EACCES;
3061 return -1;
3062 }
3063 if ((mode & D_OK) != 0 && (attributes & FILE_ATTRIBUTE_DIRECTORY) == 0)
3064 {
3065 errno = EACCES;
3066 return -1;
3067 }
3068 return 0;
3069}
3070
3071/* Shadow some MSVC runtime functions to map requests for long filenames
3072 to reasonable short names if necessary. This was originally added to
3073 permit running Emacs on NT 3.1 on a FAT partition, which doesn't support
3074 long file names. */
3075
3076int
3077sys_chdir (const char * path)
3078{
3079 return _chdir (map_w32_filename (path, NULL));
3080}
3081
3082int
3083sys_chmod (const char * path, int mode)
3084{
3085 path = chase_symlinks (map_w32_filename (path, NULL));
3086 return _chmod (path, mode);
3087}
3088
3089int
3090sys_chown (const char *path, uid_t owner, gid_t group)
3091{
3092 if (sys_chmod (path, S_IREAD) == -1) /* check if file exists */
3093 return -1;
3094 return 0;
3095}
3096
3097int
3098sys_creat (const char * path, int mode)
3099{
3100 return _creat (map_w32_filename (path, NULL), mode);
3101}
3102
3103FILE *
3104sys_fopen (const char * path, const char * mode)
3105{
3106 int fd;
3107 int oflag;
3108 const char * mode_save = mode;
3109
3110 /* Force all file handles to be non-inheritable. This is necessary to
3111 ensure child processes don't unwittingly inherit handles that might
3112 prevent future file access. */
3113
3114 if (mode[0] == 'r')
3115 oflag = O_RDONLY;
3116 else if (mode[0] == 'w' || mode[0] == 'a')
3117 oflag = O_WRONLY | O_CREAT | O_TRUNC;
3118 else
3119 return NULL;
3120
3121 /* Only do simplistic option parsing. */
3122 while (*++mode)
3123 if (mode[0] == '+')
3124 {
3125 oflag &= ~(O_RDONLY | O_WRONLY);
3126 oflag |= O_RDWR;
3127 }
3128 else if (mode[0] == 'b')
3129 {
3130 oflag &= ~O_TEXT;
3131 oflag |= O_BINARY;
3132 }
3133 else if (mode[0] == 't')
3134 {
3135 oflag &= ~O_BINARY;
3136 oflag |= O_TEXT;
3137 }
3138 else break;
3139
3140 fd = _open (map_w32_filename (path, NULL), oflag | _O_NOINHERIT, 0644);
3141 if (fd < 0)
3142 return NULL;
3143
3144 return _fdopen (fd, mode_save);
3145}
3146
3147/* This only works on NTFS volumes, but is useful to have. */
3148int
3149sys_link (const char * old, const char * new)
3150{
3151 HANDLE fileh;
3152 int result = -1;
3153 char oldname[MAX_PATH], newname[MAX_PATH];
3154
3155 if (old == NULL || new == NULL)
3156 {
3157 errno = ENOENT;
3158 return -1;
3159 }
3160
3161 strcpy (oldname, map_w32_filename (old, NULL));
3162 strcpy (newname, map_w32_filename (new, NULL));
3163
3164 fileh = CreateFile (oldname, 0, 0, NULL, OPEN_EXISTING,
3165 FILE_FLAG_BACKUP_SEMANTICS, NULL);
3166 if (fileh != INVALID_HANDLE_VALUE)
3167 {
3168 int wlen;
3169
3170 /* Confusingly, the "alternate" stream name field does not apply
3171 when restoring a hard link, and instead contains the actual
3172 stream data for the link (ie. the name of the link to create).
3173 The WIN32_STREAM_ID structure before the cStreamName field is
3174 the stream header, which is then immediately followed by the
3175 stream data. */
3176
3177 struct {
3178 WIN32_STREAM_ID wid;
3179 WCHAR wbuffer[MAX_PATH]; /* extra space for link name */
3180 } data;
3181
3182 wlen = MultiByteToWideChar (CP_ACP, MB_PRECOMPOSED, newname, -1,
3183 data.wid.cStreamName, MAX_PATH);
3184 if (wlen > 0)
3185 {
3186 LPVOID context = NULL;
3187 DWORD wbytes = 0;
3188
3189 data.wid.dwStreamId = BACKUP_LINK;
3190 data.wid.dwStreamAttributes = 0;
3191 data.wid.Size.LowPart = wlen * sizeof (WCHAR);
3192 data.wid.Size.HighPart = 0;
3193 data.wid.dwStreamNameSize = 0;
3194
3195 if (BackupWrite (fileh, (LPBYTE)&data,
3196 offsetof (WIN32_STREAM_ID, cStreamName)
3197 + data.wid.Size.LowPart,
3198 &wbytes, FALSE, FALSE, &context)
3199 && BackupWrite (fileh, NULL, 0, &wbytes, TRUE, FALSE, &context))
3200 {
3201 /* succeeded */
3202 result = 0;
3203 }
3204 else
3205 {
3206 /* Should try mapping GetLastError to errno; for now just
3207 indicate a general error (eg. links not supported). */
3208 errno = EINVAL; // perhaps EMLINK?
3209 }
3210 }
3211
3212 CloseHandle (fileh);
3213 }
3214 else
3215 errno = ENOENT;
3216
3217 return result;
3218}
3219
3220int
3221sys_mkdir (const char * path)
3222{
3223 return _mkdir (map_w32_filename (path, NULL));
3224}
3225
3226/* Because of long name mapping issues, we need to implement this
3227 ourselves. Also, MSVC's _mktemp returns NULL when it can't generate
3228 a unique name, instead of setting the input template to an empty
3229 string.
3230
3231 Standard algorithm seems to be use pid or tid with a letter on the
3232 front (in place of the 6 X's) and cycle through the letters to find a
3233 unique name. We extend that to allow any reasonable character as the
3234 first of the 6 X's. */
3235char *
3236sys_mktemp (char * template)
3237{
3238 char * p;
3239 int i;
3240 unsigned uid = GetCurrentThreadId ();
3241 static char first_char[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#";
3242
3243 if (template == NULL)
3244 return NULL;
3245 p = template + strlen (template);
3246 i = 5;
3247 /* replace up to the last 5 X's with uid in decimal */
3248 while (--p >= template && p[0] == 'X' && --i >= 0)
3249 {
3250 p[0] = '0' + uid % 10;
3251 uid /= 10;
3252 }
3253
3254 if (i < 0 && p[0] == 'X')
3255 {
3256 i = 0;
3257 do
3258 {
3259 int save_errno = errno;
3260 p[0] = first_char[i];
3261 if (faccessat (AT_FDCWD, template, F_OK, AT_EACCESS) < 0)
3262 {
3263 errno = save_errno;
3264 return template;
3265 }
3266 }
3267 while (++i < sizeof (first_char));
3268 }
3269
3270 /* Template is badly formed or else we can't generate a unique name,
3271 so return empty string */
3272 template[0] = 0;
3273 return template;
3274}
3275
3276int
3277sys_open (const char * path, int oflag, int mode)
3278{
3279 const char* mpath = map_w32_filename (path, NULL);
3280 /* Try to open file without _O_CREAT, to be able to write to hidden
3281 and system files. Force all file handles to be
3282 non-inheritable. */
3283 int res = _open (mpath, (oflag & ~_O_CREAT) | _O_NOINHERIT, mode);
3284 if (res >= 0)
3285 return res;
3286 return _open (mpath, oflag | _O_NOINHERIT, mode);
3287}
3288
3289int
3290sys_rename (const char * oldname, const char * newname)
3291{
3292 BOOL result;
3293 char temp[MAX_PATH];
3294 int newname_dev;
3295 int oldname_dev;
3296
3297 /* MoveFile on Windows 95 doesn't correctly change the short file name
3298 alias in a number of circumstances (it is not easy to predict when
3299 just by looking at oldname and newname, unfortunately). In these
3300 cases, renaming through a temporary name avoids the problem.
3301
3302 A second problem on Windows 95 is that renaming through a temp name when
3303 newname is uppercase fails (the final long name ends up in
3304 lowercase, although the short alias might be uppercase) UNLESS the
3305 long temp name is not 8.3.
3306
3307 So, on Windows 95 we always rename through a temp name, and we make sure
3308 the temp name has a long extension to ensure correct renaming. */
3309
3310 strcpy (temp, map_w32_filename (oldname, NULL));
3311
3312 /* volume_info is set indirectly by map_w32_filename. */
3313 oldname_dev = volume_info.serialnum;
3314
3315 if (os_subtype == OS_9X)
3316 {
3317 char * o;
3318 char * p;
3319 int i = 0;
3320
3321 oldname = map_w32_filename (oldname, NULL);
3322 if ((o = strrchr (oldname, '\\')))
3323 o++;
3324 else
3325 o = (char *) oldname;
3326
3327 if ((p = strrchr (temp, '\\')))
3328 p++;
3329 else
3330 p = temp;
3331
3332 do
3333 {
3334 /* Force temp name to require a manufactured 8.3 alias - this
3335 seems to make the second rename work properly. */
3336 sprintf (p, "_.%s.%u", o, i);
3337 i++;
3338 result = rename (oldname, temp);
3339 }
3340 /* This loop must surely terminate! */
3341 while (result < 0 && errno == EEXIST);
3342 if (result < 0)
3343 return -1;
3344 }
3345
3346 /* Emulate Unix behavior - newname is deleted if it already exists
3347 (at least if it is a file; don't do this for directories).
3348
3349 Since we mustn't do this if we are just changing the case of the
3350 file name (we would end up deleting the file we are trying to
3351 rename!), we let rename detect if the destination file already
3352 exists - that way we avoid the possible pitfalls of trying to
3353 determine ourselves whether two names really refer to the same
3354 file, which is not always possible in the general case. (Consider
3355 all the permutations of shared or subst'd drives, etc.) */
3356
3357 newname = map_w32_filename (newname, NULL);
3358
3359 /* volume_info is set indirectly by map_w32_filename. */
3360 newname_dev = volume_info.serialnum;
3361
3362 result = rename (temp, newname);
3363
3364 if (result < 0)
3365 {
3366 DWORD w32err = GetLastError ();
3367
3368 if (errno == EACCES
3369 && newname_dev != oldname_dev)
3370 {
3371 /* The implementation of `rename' on Windows does not return
3372 errno = EXDEV when you are moving a directory to a
3373 different storage device (ex. logical disk). It returns
3374 EACCES instead. So here we handle such situations and
3375 return EXDEV. */
3376 DWORD attributes;
3377
3378 if ((attributes = GetFileAttributes (temp)) != -1
3379 && (attributes & FILE_ATTRIBUTE_DIRECTORY))
3380 errno = EXDEV;
3381 }
3382 else if (errno == EEXIST)
3383 {
3384 if (_chmod (newname, 0666) != 0)
3385 return result;
3386 if (_unlink (newname) != 0)
3387 return result;
3388 result = rename (temp, newname);
3389 }
3390 else if (w32err == ERROR_PRIVILEGE_NOT_HELD
3391 && is_symlink (temp))
3392 {
3393 /* This is Windows prohibiting the user from creating a
3394 symlink in another place, since that requires
3395 privileges. */
3396 errno = EPERM;
3397 }
3398 }
3399
3400 return result;
3401}
3402
3403int
3404sys_rmdir (const char * path)
3405{
3406 return _rmdir (map_w32_filename (path, NULL));
3407}
3408
3409int
3410sys_unlink (const char * path)
3411{
3412 path = map_w32_filename (path, NULL);
3413
3414 /* On Unix, unlink works without write permission. */
3415 _chmod (path, 0666);
3416 return _unlink (path);
3417}
3418
3419static FILETIME utc_base_ft;
3420static ULONGLONG utc_base; /* In 100ns units */
3421static int init = 0;
3422
3423#define FILETIME_TO_U64(result, ft) \
3424 do { \
3425 ULARGE_INTEGER uiTemp; \
3426 uiTemp.LowPart = (ft).dwLowDateTime; \
3427 uiTemp.HighPart = (ft).dwHighDateTime; \
3428 result = uiTemp.QuadPart; \
3429 } while (0)
3430
3431static void
3432initialize_utc_base (void)
3433{
3434 /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */
3435 SYSTEMTIME st;
3436
3437 st.wYear = 1970;
3438 st.wMonth = 1;
3439 st.wDay = 1;
3440 st.wHour = 0;
3441 st.wMinute = 0;
3442 st.wSecond = 0;
3443 st.wMilliseconds = 0;
3444
3445 SystemTimeToFileTime (&st, &utc_base_ft);
3446 FILETIME_TO_U64 (utc_base, utc_base_ft);
3447}
3448
3449static time_t
3450convert_time (FILETIME ft)
3451{
3452 ULONGLONG tmp;
3453
3454 if (!init)
3455 {
3456 initialize_utc_base ();
3457 init = 1;
3458 }
3459
3460 if (CompareFileTime (&ft, &utc_base_ft) < 0)
3461 return 0;
3462
3463 FILETIME_TO_U64 (tmp, ft);
3464 return (time_t) ((tmp - utc_base) / 10000000L);
3465}
3466
3467static void
3468convert_from_time_t (time_t time, FILETIME * pft)
3469{
3470 ULARGE_INTEGER tmp;
3471
3472 if (!init)
3473 {
3474 initialize_utc_base ();
3475 init = 1;
3476 }
3477
3478 /* time in 100ns units since 1-Jan-1601 */
3479 tmp.QuadPart = (ULONGLONG) time * 10000000L + utc_base;
3480 pft->dwHighDateTime = tmp.HighPart;
3481 pft->dwLowDateTime = tmp.LowPart;
3482}
3483
3484#if 0
3485/* No reason to keep this; faking inode values either by hashing or even
3486 using the file index from GetInformationByHandle, is not perfect and
3487 so by default Emacs doesn't use the inode values on Windows.
3488 Instead, we now determine file-truename correctly (except for
3489 possible drive aliasing etc). */
3490
3491/* Modified version of "PJW" algorithm (see the "Dragon" compiler book). */
3492static unsigned
3493hashval (const unsigned char * str)
3494{
3495 unsigned h = 0;
3496 while (*str)
3497 {
3498 h = (h << 4) + *str++;
3499 h ^= (h >> 28);
3500 }
3501 return h;
3502}
3503
3504/* Return the hash value of the canonical pathname, excluding the
3505 drive/UNC header, to get a hopefully unique inode number. */
3506static DWORD
3507generate_inode_val (const char * name)
3508{
3509 char fullname[ MAX_PATH ];
3510 char * p;
3511 unsigned hash;
3512
3513 /* Get the truly canonical filename, if it exists. (Note: this
3514 doesn't resolve aliasing due to subst commands, or recognize hard
3515 links. */
3516 if (!w32_get_long_filename ((char *)name, fullname, MAX_PATH))
3517 emacs_abort ();
3518
3519 parse_root (fullname, &p);
3520 /* Normal W32 filesystems are still case insensitive. */
3521 _strlwr (p);
3522 return hashval (p);
3523}
3524
3525#endif
3526
3527static PSECURITY_DESCRIPTOR
3528get_file_security_desc_by_handle (HANDLE h)
3529{
3530 PSECURITY_DESCRIPTOR psd = NULL;
3531 DWORD err;
3532 SECURITY_INFORMATION si = OWNER_SECURITY_INFORMATION
3533 | GROUP_SECURITY_INFORMATION /* | DACL_SECURITY_INFORMATION */ ;
3534
3535 err = get_security_info (h, SE_FILE_OBJECT, si,
3536 NULL, NULL, NULL, NULL, &psd);
3537 if (err != ERROR_SUCCESS)
3538 return NULL;
3539
3540 return psd;
3541}
3542
3543static PSECURITY_DESCRIPTOR
3544get_file_security_desc_by_name (const char *fname)
3545{
3546 PSECURITY_DESCRIPTOR psd = NULL;
3547 DWORD sd_len, err;
3548 SECURITY_INFORMATION si = OWNER_SECURITY_INFORMATION
3549 | GROUP_SECURITY_INFORMATION /* | DACL_SECURITY_INFORMATION */ ;
3550
3551 if (!get_file_security (fname, si, psd, 0, &sd_len))
3552 {
3553 err = GetLastError ();
3554 if (err != ERROR_INSUFFICIENT_BUFFER)
3555 return NULL;
3556 }
3557
3558 psd = xmalloc (sd_len);
3559 if (!get_file_security (fname, si, psd, sd_len, &sd_len))
3560 {
3561 xfree (psd);
3562 return NULL;
3563 }
3564
3565 return psd;
3566}
3567
3568static DWORD
3569get_rid (PSID sid)
3570{
3571 unsigned n_subauthorities;
3572
3573 /* Use the last sub-authority value of the RID, the relative
3574 portion of the SID, as user/group ID. */
3575 n_subauthorities = *get_sid_sub_authority_count (sid);
3576 if (n_subauthorities < 1)
3577 return 0; /* the "World" RID */
3578 return *get_sid_sub_authority (sid, n_subauthorities - 1);
3579}
3580
3581/* Caching SID and account values for faster lokup. */
3582
3583#ifdef __GNUC__
3584# define FLEXIBLE_ARRAY_MEMBER
3585#else
3586# define FLEXIBLE_ARRAY_MEMBER 1
3587#endif
3588
3589struct w32_id {
3590 unsigned rid;
3591 struct w32_id *next;
3592 char name[GNLEN+1];
3593 unsigned char sid[FLEXIBLE_ARRAY_MEMBER];
3594};
3595
3596static struct w32_id *w32_idlist;
3597
3598static int
3599w32_cached_id (PSID sid, unsigned *id, char *name)
3600{
3601 struct w32_id *tail, *found;
3602
3603 for (found = NULL, tail = w32_idlist; tail; tail = tail->next)
3604 {
3605 if (equal_sid ((PSID)tail->sid, sid))
3606 {
3607 found = tail;
3608 break;
3609 }
3610 }
3611 if (found)
3612 {
3613 *id = found->rid;
3614 strcpy (name, found->name);
3615 return 1;
3616 }
3617 else
3618 return 0;
3619}
3620
3621static void
3622w32_add_to_cache (PSID sid, unsigned id, char *name)
3623{
3624 DWORD sid_len;
3625 struct w32_id *new_entry;
3626
3627 /* We don't want to leave behind stale cache from when Emacs was
3628 dumped. */
3629 if (initialized)
3630 {
3631 sid_len = get_length_sid (sid);
3632 new_entry = xmalloc (offsetof (struct w32_id, sid) + sid_len);
3633 if (new_entry)
3634 {
3635 new_entry->rid = id;
3636 strcpy (new_entry->name, name);
3637 copy_sid (sid_len, (PSID)new_entry->sid, sid);
3638 new_entry->next = w32_idlist;
3639 w32_idlist = new_entry;
3640 }
3641 }
3642}
3643
3644#define UID 1
3645#define GID 2
3646
3647static int
3648get_name_and_id (PSECURITY_DESCRIPTOR psd, unsigned *id, char *nm, int what)
3649{
3650 PSID sid = NULL;
3651 BOOL dflt;
3652 SID_NAME_USE ignore;
3653 char name[UNLEN+1];
3654 DWORD name_len = sizeof (name);
3655 char domain[1024];
3656 DWORD domain_len = sizeof (domain);
3657 int use_dflt = 0;
3658 int result;
3659
3660 if (what == UID)
3661 result = get_security_descriptor_owner (psd, &sid, &dflt);
3662 else if (what == GID)
3663 result = get_security_descriptor_group (psd, &sid, &dflt);
3664 else
3665 result = 0;
3666
3667 if (!result || !is_valid_sid (sid))
3668 use_dflt = 1;
3669 else if (!w32_cached_id (sid, id, nm))
3670 {
3671 if (!lookup_account_sid (NULL, sid, name, &name_len,
3672 domain, &domain_len, &ignore)
3673 || name_len > UNLEN+1)
3674 use_dflt = 1;
3675 else
3676 {
3677 *id = get_rid (sid);
3678 strcpy (nm, name);
3679 w32_add_to_cache (sid, *id, name);
3680 }
3681 }
3682 return use_dflt;
3683}
3684
3685static void
3686get_file_owner_and_group (PSECURITY_DESCRIPTOR psd, struct stat *st)
3687{
3688 int dflt_usr = 0, dflt_grp = 0;
3689
3690 if (!psd)
3691 {
3692 dflt_usr = 1;
3693 dflt_grp = 1;
3694 }
3695 else
3696 {
3697 if (get_name_and_id (psd, &st->st_uid, st->st_uname, UID))
3698 dflt_usr = 1;
3699 if (get_name_and_id (psd, &st->st_gid, st->st_gname, GID))
3700 dflt_grp = 1;
3701 }
3702 /* Consider files to belong to current user/group, if we cannot get
3703 more accurate information. */
3704 if (dflt_usr)
3705 {
3706 st->st_uid = dflt_passwd.pw_uid;
3707 strcpy (st->st_uname, dflt_passwd.pw_name);
3708 }
3709 if (dflt_grp)
3710 {
3711 st->st_gid = dflt_passwd.pw_gid;
3712 strcpy (st->st_gname, dflt_group.gr_name);
3713 }
3714}
3715
3716/* Return non-zero if NAME is a potentially slow filesystem. */
3717int
3718is_slow_fs (const char *name)
3719{
3720 char drive_root[4];
3721 UINT devtype;
3722
3723 if (IS_DIRECTORY_SEP (name[0]) && IS_DIRECTORY_SEP (name[1]))
3724 devtype = DRIVE_REMOTE; /* assume UNC name is remote */
3725 else if (!(strlen (name) >= 2 && IS_DEVICE_SEP (name[1])))
3726 devtype = GetDriveType (NULL); /* use root of current drive */
3727 else
3728 {
3729 /* GetDriveType needs the root directory of the drive. */
3730 strncpy (drive_root, name, 2);
3731 drive_root[2] = '\\';
3732 drive_root[3] = '\0';
3733 devtype = GetDriveType (drive_root);
3734 }
3735 return !(devtype == DRIVE_FIXED || devtype == DRIVE_RAMDISK);
3736}
3737
3738/* If this is non-zero, the caller wants accurate information about
3739 file's owner and group, which could be expensive to get. */
3740int w32_stat_get_owner_group;
3741
3742/* MSVC stat function can't cope with UNC names and has other bugs, so
3743 replace it with our own. This also allows us to calculate consistent
3744 inode values and owner/group without hacks in the main Emacs code. */
3745
3746static int
3747stat_worker (const char * path, struct stat * buf, int follow_symlinks)
3748{
3749 char *name, *save_name, *r;
3750 WIN32_FIND_DATA wfd;
3751 HANDLE fh;
3752 unsigned __int64 fake_inode = 0;
3753 int permission;
3754 int len;
3755 int rootdir = FALSE;
3756 PSECURITY_DESCRIPTOR psd = NULL;
3757 int is_a_symlink = 0;
3758 DWORD file_flags = FILE_FLAG_BACKUP_SEMANTICS;
3759 DWORD access_rights = 0;
3760 DWORD fattrs = 0, serialnum = 0, fs_high = 0, fs_low = 0, nlinks = 1;
3761 FILETIME ctime, atime, wtime;
3762
3763 if (path == NULL || buf == NULL)
3764 {
3765 errno = EFAULT;
3766 return -1;
3767 }
3768
3769 save_name = name = (char *) map_w32_filename (path, &path);
3770 /* Must be valid filename, no wild cards or other invalid
3771 characters. We use _mbspbrk to support multibyte strings that
3772 might look to strpbrk as if they included literal *, ?, and other
3773 characters mentioned below that are disallowed by Windows
3774 filesystems. */
3775 if (_mbspbrk (name, "*?|<>\""))
3776 {
3777 errno = ENOENT;
3778 return -1;
3779 }
3780
3781 /* Remove trailing directory separator, unless name is the root
3782 directory of a drive or UNC volume in which case ensure there
3783 is a trailing separator. */
3784 len = strlen (name);
3785 name = strcpy (alloca (len + 2), name);
3786
3787 /* Avoid a somewhat costly call to is_symlink if the filesystem
3788 doesn't support symlinks. */
3789 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
3790 is_a_symlink = is_symlink (name);
3791
3792 /* Plan A: Open the file and get all the necessary information via
3793 the resulting handle. This solves several issues in one blow:
3794
3795 . retrieves attributes for the target of a symlink, if needed
3796 . gets attributes of root directories and symlinks pointing to
3797 root directories, thus avoiding the need for special-casing
3798 these and detecting them by examining the file-name format
3799 . retrieves more accurate attributes (e.g., non-zero size for
3800 some directories, esp. directories that are junction points)
3801 . correctly resolves "c:/..", "/.." and similar file names
3802 . avoids run-time penalties for 99% of use cases
3803
3804 Plan A is always tried first, unless the user asked not to (but
3805 if the file is a symlink and we need to follow links, we try Plan
3806 A even if the user asked not to).
3807
3808 If Plan A fails, we go to Plan B (below), where various
3809 potentially expensive techniques must be used to handle "special"
3810 files such as UNC volumes etc. */
3811 if (!(NILP (Vw32_get_true_file_attributes)
3812 || (EQ (Vw32_get_true_file_attributes, Qlocal) && is_slow_fs (name)))
3813 /* Following symlinks requires getting the info by handle. */
3814 || (is_a_symlink && follow_symlinks))
3815 {
3816 BY_HANDLE_FILE_INFORMATION info;
3817
3818 if (is_a_symlink && !follow_symlinks)
3819 file_flags |= FILE_FLAG_OPEN_REPARSE_POINT;
3820 /* READ_CONTROL access rights are required to get security info
3821 by handle. But if the OS doesn't support security in the
3822 first place, we don't need to try. */
3823 if (is_windows_9x () != TRUE)
3824 access_rights |= READ_CONTROL;
3825
3826 fh = CreateFile (name, access_rights, 0, NULL, OPEN_EXISTING,
3827 file_flags, NULL);
3828 /* If CreateFile fails with READ_CONTROL, try again with zero as
3829 access rights. */
3830 if (fh == INVALID_HANDLE_VALUE && access_rights)
3831 fh = CreateFile (name, 0, 0, NULL, OPEN_EXISTING,
3832 file_flags, NULL);
3833 if (fh == INVALID_HANDLE_VALUE)
3834 goto no_true_file_attributes;
3835
3836 /* This is more accurate in terms of getting the correct number
3837 of links, but is quite slow (it is noticeable when Emacs is
3838 making a list of file name completions). */
3839 if (GetFileInformationByHandle (fh, &info))
3840 {
3841 nlinks = info.nNumberOfLinks;
3842 /* Might as well use file index to fake inode values, but this
3843 is not guaranteed to be unique unless we keep a handle open
3844 all the time (even then there are situations where it is
3845 not unique). Reputedly, there are at most 48 bits of info
3846 (on NTFS, presumably less on FAT). */
3847 fake_inode = info.nFileIndexHigh;
3848 fake_inode <<= 32;
3849 fake_inode += info.nFileIndexLow;
3850 serialnum = info.dwVolumeSerialNumber;
3851 fs_high = info.nFileSizeHigh;
3852 fs_low = info.nFileSizeLow;
3853 ctime = info.ftCreationTime;
3854 atime = info.ftLastAccessTime;
3855 wtime = info.ftLastWriteTime;
3856 fattrs = info.dwFileAttributes;
3857 }
3858 else
3859 {
3860 /* We don't go to Plan B here, because it's not clear that
3861 it's a good idea. The only known use case where
3862 CreateFile succeeds, but GetFileInformationByHandle fails
3863 (with ERROR_INVALID_FUNCTION) is for character devices
3864 such as NUL, PRN, etc. For these, switching to Plan B is
3865 a net loss, because we lose the character device
3866 attribute returned by GetFileType below (FindFirstFile
3867 doesn't set that bit in the attributes), and the other
3868 fields don't make sense for character devices anyway.
3869 Emacs doesn't really care for non-file entities in the
3870 context of l?stat, so neither do we. */
3871
3872 /* w32err is assigned so one could put a breakpoint here and
3873 examine its value, when GetFileInformationByHandle
3874 fails. */
3875 DWORD w32err = GetLastError ();
3876
3877 switch (w32err)
3878 {
3879 case ERROR_FILE_NOT_FOUND: /* can this ever happen? */
3880 errno = ENOENT;
3881 return -1;
3882 }
3883 }
3884
3885 /* Test for a symlink before testing for a directory, since
3886 symlinks to directories have the directory bit set, but we
3887 don't want them to appear as directories. */
3888 if (is_a_symlink && !follow_symlinks)
3889 buf->st_mode = S_IFLNK;
3890 else if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
3891 buf->st_mode = S_IFDIR;
3892 else
3893 {
3894 DWORD ftype = GetFileType (fh);
3895
3896 switch (ftype)
3897 {
3898 case FILE_TYPE_DISK:
3899 buf->st_mode = S_IFREG;
3900 break;
3901 case FILE_TYPE_PIPE:
3902 buf->st_mode = S_IFIFO;
3903 break;
3904 case FILE_TYPE_CHAR:
3905 case FILE_TYPE_UNKNOWN:
3906 default:
3907 buf->st_mode = S_IFCHR;
3908 }
3909 }
3910 /* We produce the fallback owner and group data, based on the
3911 current user that runs Emacs, in the following cases:
3912
3913 . caller didn't request owner and group info
3914 . this is Windows 9X
3915 . getting security by handle failed, and we need to produce
3916 information for the target of a symlink (this is better
3917 than producing a potentially misleading info about the
3918 symlink itself)
3919
3920 If getting security by handle fails, and we don't need to
3921 resolve symlinks, we try getting security by name. */
3922 if (!w32_stat_get_owner_group || is_windows_9x () == TRUE)
3923 get_file_owner_and_group (NULL, buf);
3924 else
3925 {
3926 psd = get_file_security_desc_by_handle (fh);
3927 if (psd)
3928 {
3929 get_file_owner_and_group (psd, buf);
3930 LocalFree (psd);
3931 }
3932 else if (!(is_a_symlink && follow_symlinks))
3933 {
3934 psd = get_file_security_desc_by_name (name);
3935 get_file_owner_and_group (psd, buf);
3936 xfree (psd);
3937 }
3938 else
3939 get_file_owner_and_group (NULL, buf);
3940 }
3941 CloseHandle (fh);
3942 }
3943 else
3944 {
3945 no_true_file_attributes:
3946 /* Plan B: Either getting a handle on the file failed, or the
3947 caller explicitly asked us to not bother making this
3948 information more accurate.
3949
3950 Implementation note: In Plan B, we never bother to resolve
3951 symlinks, even if we got here because we tried Plan A and
3952 failed. That's because, even if the caller asked for extra
3953 precision by setting Vw32_get_true_file_attributes to t,
3954 resolving symlinks requires acquiring a file handle to the
3955 symlink, which we already know will fail. And if the user
3956 did not ask for extra precision, resolving symlinks will fly
3957 in the face of that request, since the user then wants the
3958 lightweight version of the code. */
3959 rootdir = (path >= save_name + len - 1
3960 && (IS_DIRECTORY_SEP (*path) || *path == 0));
3961
3962 /* If name is "c:/.." or "/.." then stat "c:/" or "/". */
3963 r = IS_DEVICE_SEP (name[1]) ? &name[2] : name;
3964 if (IS_DIRECTORY_SEP (r[0])
3965 && r[1] == '.' && r[2] == '.' && r[3] == '\0')
3966 r[1] = r[2] = '\0';
3967
3968 /* Note: If NAME is a symlink to the root of a UNC volume
3969 (i.e. "\\SERVER"), we will not detect that here, and we will
3970 return data about the symlink as result of FindFirst below.
3971 This is unfortunate, but that marginal use case does not
3972 justify a call to chase_symlinks which would impose a penalty
3973 on all the other use cases. (We get here for symlinks to
3974 roots of UNC volumes because CreateFile above fails for them,
3975 unlike with symlinks to root directories X:\ of drives.) */
3976 if (is_unc_volume (name))
3977 {
3978 fattrs = unc_volume_file_attributes (name);
3979 if (fattrs == -1)
3980 return -1;
3981
3982 ctime = atime = wtime = utc_base_ft;
3983 }
3984 else if (rootdir)
3985 {
3986 if (!IS_DIRECTORY_SEP (name[len-1]))
3987 strcat (name, "\\");
3988 if (GetDriveType (name) < 2)
3989 {
3990 errno = ENOENT;
3991 return -1;
3992 }
3993
3994 fattrs = FILE_ATTRIBUTE_DIRECTORY;
3995 ctime = atime = wtime = utc_base_ft;
3996 }
3997 else
3998 {
3999 if (IS_DIRECTORY_SEP (name[len-1]))
4000 name[len - 1] = 0;
4001
4002 /* (This is hacky, but helps when doing file completions on
4003 network drives.) Optimize by using information available from
4004 active readdir if possible. */
4005 len = strlen (dir_pathname);
4006 if (IS_DIRECTORY_SEP (dir_pathname[len-1]))
4007 len--;
4008 if (dir_find_handle != INVALID_HANDLE_VALUE
4009 && !(is_a_symlink && follow_symlinks)
4010 && strnicmp (save_name, dir_pathname, len) == 0
4011 && IS_DIRECTORY_SEP (name[len])
4012 && xstrcasecmp (name + len + 1, dir_static.d_name) == 0)
4013 {
4014 /* This was the last entry returned by readdir. */
4015 wfd = dir_find_data;
4016 }
4017 else
4018 {
4019 logon_network_drive (name);
4020
4021 fh = FindFirstFile (name, &wfd);
4022 if (fh == INVALID_HANDLE_VALUE)
4023 {
4024 errno = ENOENT;
4025 return -1;
4026 }
4027 FindClose (fh);
4028 }
4029 /* Note: if NAME is a symlink, the information we get from
4030 FindFirstFile is for the symlink, not its target. */
4031 fattrs = wfd.dwFileAttributes;
4032 ctime = wfd.ftCreationTime;
4033 atime = wfd.ftLastAccessTime;
4034 wtime = wfd.ftLastWriteTime;
4035 fs_high = wfd.nFileSizeHigh;
4036 fs_low = wfd.nFileSizeLow;
4037 fake_inode = 0;
4038 nlinks = 1;
4039 serialnum = volume_info.serialnum;
4040 }
4041 if (is_a_symlink && !follow_symlinks)
4042 buf->st_mode = S_IFLNK;
4043 else if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
4044 buf->st_mode = S_IFDIR;
4045 else
4046 buf->st_mode = S_IFREG;
4047
4048 get_file_owner_and_group (NULL, buf);
4049 }
4050
4051#if 0
4052 /* Not sure if there is any point in this. */
4053 if (!NILP (Vw32_generate_fake_inodes))
4054 fake_inode = generate_inode_val (name);
4055 else if (fake_inode == 0)
4056 {
4057 /* For want of something better, try to make everything unique. */
4058 static DWORD gen_num = 0;
4059 fake_inode = ++gen_num;
4060 }
4061#endif
4062
4063 buf->st_ino = fake_inode;
4064
4065 buf->st_dev = serialnum;
4066 buf->st_rdev = serialnum;
4067
4068 buf->st_size = fs_high;
4069 buf->st_size <<= 32;
4070 buf->st_size += fs_low;
4071 buf->st_nlink = nlinks;
4072
4073 /* Convert timestamps to Unix format. */
4074 buf->st_mtime = convert_time (wtime);
4075 buf->st_atime = convert_time (atime);
4076 if (buf->st_atime == 0) buf->st_atime = buf->st_mtime;
4077 buf->st_ctime = convert_time (ctime);
4078 if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime;
4079
4080 /* determine rwx permissions */
4081 if (is_a_symlink && !follow_symlinks)
4082 permission = S_IREAD | S_IWRITE | S_IEXEC; /* Posix expectations */
4083 else
4084 {
4085 if (fattrs & FILE_ATTRIBUTE_READONLY)
4086 permission = S_IREAD;
4087 else
4088 permission = S_IREAD | S_IWRITE;
4089
4090 if (fattrs & FILE_ATTRIBUTE_DIRECTORY)
4091 permission |= S_IEXEC;
4092 else if (is_exec (name))
4093 permission |= S_IEXEC;
4094 }
4095
4096 buf->st_mode |= permission | (permission >> 3) | (permission >> 6);
4097
4098 return 0;
4099}
4100
4101int
4102stat (const char * path, struct stat * buf)
4103{
4104 return stat_worker (path, buf, 1);
4105}
4106
4107int
4108lstat (const char * path, struct stat * buf)
4109{
4110 return stat_worker (path, buf, 0);
4111}
4112
4113/* Provide fstat and utime as well as stat for consistent handling of
4114 file timestamps. */
4115int
4116fstat (int desc, struct stat * buf)
4117{
4118 HANDLE fh = (HANDLE) _get_osfhandle (desc);
4119 BY_HANDLE_FILE_INFORMATION info;
4120 unsigned __int64 fake_inode;
4121 int permission;
4122
4123 switch (GetFileType (fh) & ~FILE_TYPE_REMOTE)
4124 {
4125 case FILE_TYPE_DISK:
4126 buf->st_mode = S_IFREG;
4127 if (!GetFileInformationByHandle (fh, &info))
4128 {
4129 errno = EACCES;
4130 return -1;
4131 }
4132 break;
4133 case FILE_TYPE_PIPE:
4134 buf->st_mode = S_IFIFO;
4135 goto non_disk;
4136 case FILE_TYPE_CHAR:
4137 case FILE_TYPE_UNKNOWN:
4138 default:
4139 buf->st_mode = S_IFCHR;
4140 non_disk:
4141 memset (&info, 0, sizeof (info));
4142 info.dwFileAttributes = 0;
4143 info.ftCreationTime = utc_base_ft;
4144 info.ftLastAccessTime = utc_base_ft;
4145 info.ftLastWriteTime = utc_base_ft;
4146 }
4147
4148 if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
4149 buf->st_mode = S_IFDIR;
4150
4151 buf->st_nlink = info.nNumberOfLinks;
4152 /* Might as well use file index to fake inode values, but this
4153 is not guaranteed to be unique unless we keep a handle open
4154 all the time (even then there are situations where it is
4155 not unique). Reputedly, there are at most 48 bits of info
4156 (on NTFS, presumably less on FAT). */
4157 fake_inode = info.nFileIndexHigh;
4158 fake_inode <<= 32;
4159 fake_inode += info.nFileIndexLow;
4160
4161 /* MSVC defines _ino_t to be short; other libc's might not. */
4162 if (sizeof (buf->st_ino) == 2)
4163 buf->st_ino = fake_inode ^ (fake_inode >> 16);
4164 else
4165 buf->st_ino = fake_inode;
4166
4167 /* If the caller so requested, get the true file owner and group.
4168 Otherwise, consider the file to belong to the current user. */
4169 if (!w32_stat_get_owner_group || is_windows_9x () == TRUE)
4170 get_file_owner_and_group (NULL, buf);
4171 else
4172 {
4173 PSECURITY_DESCRIPTOR psd = NULL;
4174
4175 psd = get_file_security_desc_by_handle (fh);
4176 if (psd)
4177 {
4178 get_file_owner_and_group (psd, buf);
4179 LocalFree (psd);
4180 }
4181 else
4182 get_file_owner_and_group (NULL, buf);
4183 }
4184
4185 buf->st_dev = info.dwVolumeSerialNumber;
4186 buf->st_rdev = info.dwVolumeSerialNumber;
4187
4188 buf->st_size = info.nFileSizeHigh;
4189 buf->st_size <<= 32;
4190 buf->st_size += info.nFileSizeLow;
4191
4192 /* Convert timestamps to Unix format. */
4193 buf->st_mtime = convert_time (info.ftLastWriteTime);
4194 buf->st_atime = convert_time (info.ftLastAccessTime);
4195 if (buf->st_atime == 0) buf->st_atime = buf->st_mtime;
4196 buf->st_ctime = convert_time (info.ftCreationTime);
4197 if (buf->st_ctime == 0) buf->st_ctime = buf->st_mtime;
4198
4199 /* determine rwx permissions */
4200 if (info.dwFileAttributes & FILE_ATTRIBUTE_READONLY)
4201 permission = S_IREAD;
4202 else
4203 permission = S_IREAD | S_IWRITE;
4204
4205 if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
4206 permission |= S_IEXEC;
4207 else
4208 {
4209#if 0 /* no way of knowing the filename */
4210 char * p = strrchr (name, '.');
4211 if (p != NULL &&
4212 (xstrcasecmp (p, ".exe") == 0 ||
4213 xstrcasecmp (p, ".com") == 0 ||
4214 xstrcasecmp (p, ".bat") == 0 ||
4215 xstrcasecmp (p, ".cmd") == 0))
4216 permission |= S_IEXEC;
4217#endif
4218 }
4219
4220 buf->st_mode |= permission | (permission >> 3) | (permission >> 6);
4221
4222 return 0;
4223}
4224
4225int
4226utime (const char *name, struct utimbuf *times)
4227{
4228 struct utimbuf deftime;
4229 HANDLE fh;
4230 FILETIME mtime;
4231 FILETIME atime;
4232
4233 if (times == NULL)
4234 {
4235 deftime.modtime = deftime.actime = time (NULL);
4236 times = &deftime;
4237 }
4238
4239 /* Need write access to set times. */
4240 fh = CreateFile (name, FILE_WRITE_ATTRIBUTES,
4241 /* If NAME specifies a directory, FILE_SHARE_DELETE
4242 allows other processes to delete files inside it,
4243 while we have the directory open. */
4244 FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
4245 0, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
4246 if (fh != INVALID_HANDLE_VALUE)
4247 {
4248 convert_from_time_t (times->actime, &atime);
4249 convert_from_time_t (times->modtime, &mtime);
4250 if (!SetFileTime (fh, NULL, &atime, &mtime))
4251 {
4252 CloseHandle (fh);
4253 errno = EACCES;
4254 return -1;
4255 }
4256 CloseHandle (fh);
4257 }
4258 else
4259 {
4260 errno = EINVAL;
4261 return -1;
4262 }
4263 return 0;
4264}
4265
4266\f
4267/* Symlink-related functions. */
4268#ifndef SYMBOLIC_LINK_FLAG_DIRECTORY
4269#define SYMBOLIC_LINK_FLAG_DIRECTORY 0x1
4270#endif
4271
4272int
4273symlink (char const *filename, char const *linkname)
4274{
4275 char linkfn[MAX_PATH], *tgtfn;
4276 DWORD flags = 0;
4277 int dir_access, filename_ends_in_slash;
4278
4279 /* Diagnostics follows Posix as much as possible. */
4280 if (filename == NULL || linkname == NULL)
4281 {
4282 errno = EFAULT;
4283 return -1;
4284 }
4285 if (!*filename)
4286 {
4287 errno = ENOENT;
4288 return -1;
4289 }
4290 if (strlen (filename) > MAX_PATH || strlen (linkname) > MAX_PATH)
4291 {
4292 errno = ENAMETOOLONG;
4293 return -1;
4294 }
4295
4296 strcpy (linkfn, map_w32_filename (linkname, NULL));
4297 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) == 0)
4298 {
4299 errno = EPERM;
4300 return -1;
4301 }
4302
4303 /* Note: since empty FILENAME was already rejected, we can safely
4304 refer to FILENAME[1]. */
4305 if (!(IS_DIRECTORY_SEP (filename[0]) || IS_DEVICE_SEP (filename[1])))
4306 {
4307 /* Non-absolute FILENAME is understood as being relative to
4308 LINKNAME's directory. We need to prepend that directory to
4309 FILENAME to get correct results from faccessat below, since
4310 otherwise it will interpret FILENAME relative to the
4311 directory where the Emacs process runs. Note that
4312 make-symbolic-link always makes sure LINKNAME is a fully
4313 expanded file name. */
4314 char tem[MAX_PATH];
4315 char *p = linkfn + strlen (linkfn);
4316
4317 while (p > linkfn && !IS_ANY_SEP (p[-1]))
4318 p--;
4319 if (p > linkfn)
4320 strncpy (tem, linkfn, p - linkfn);
4321 tem[p - linkfn] = '\0';
4322 strcat (tem, filename);
4323 dir_access = faccessat (AT_FDCWD, tem, D_OK, AT_EACCESS);
4324 }
4325 else
4326 dir_access = faccessat (AT_FDCWD, filename, D_OK, AT_EACCESS);
4327
4328 /* Since Windows distinguishes between symlinks to directories and
4329 to files, we provide a kludgy feature: if FILENAME doesn't
4330 exist, but ends in a slash, we create a symlink to directory. If
4331 FILENAME exists and is a directory, we always create a symlink to
4332 directory. */
4333 filename_ends_in_slash = IS_DIRECTORY_SEP (filename[strlen (filename) - 1]);
4334 if (dir_access == 0 || filename_ends_in_slash)
4335 flags = SYMBOLIC_LINK_FLAG_DIRECTORY;
4336
4337 tgtfn = (char *)map_w32_filename (filename, NULL);
4338 if (filename_ends_in_slash)
4339 tgtfn[strlen (tgtfn) - 1] = '\0';
4340
4341 errno = 0;
4342 if (!create_symbolic_link (linkfn, tgtfn, flags))
4343 {
4344 /* ENOSYS is set by create_symbolic_link, when it detects that
4345 the OS doesn't support the CreateSymbolicLink API. */
4346 if (errno != ENOSYS)
4347 {
4348 DWORD w32err = GetLastError ();
4349
4350 switch (w32err)
4351 {
4352 /* ERROR_SUCCESS is sometimes returned when LINKFN and
4353 TGTFN point to the same file name, go figure. */
4354 case ERROR_SUCCESS:
4355 case ERROR_FILE_EXISTS:
4356 errno = EEXIST;
4357 break;
4358 case ERROR_ACCESS_DENIED:
4359 errno = EACCES;
4360 break;
4361 case ERROR_FILE_NOT_FOUND:
4362 case ERROR_PATH_NOT_FOUND:
4363 case ERROR_BAD_NETPATH:
4364 case ERROR_INVALID_REPARSE_DATA:
4365 errno = ENOENT;
4366 break;
4367 case ERROR_DIRECTORY:
4368 errno = EISDIR;
4369 break;
4370 case ERROR_PRIVILEGE_NOT_HELD:
4371 case ERROR_NOT_ALL_ASSIGNED:
4372 errno = EPERM;
4373 break;
4374 case ERROR_DISK_FULL:
4375 errno = ENOSPC;
4376 break;
4377 default:
4378 errno = EINVAL;
4379 break;
4380 }
4381 }
4382 return -1;
4383 }
4384 return 0;
4385}
4386
4387/* A quick inexpensive test of whether FILENAME identifies a file that
4388 is a symlink. Returns non-zero if it is, zero otherwise. FILENAME
4389 must already be in the normalized form returned by
4390 map_w32_filename.
4391
4392 Note: for repeated operations on many files, it is best to test
4393 whether the underlying volume actually supports symlinks, by
4394 testing the FILE_SUPPORTS_REPARSE_POINTS bit in volume's flags, and
4395 avoid the call to this function if it doesn't. That's because the
4396 call to GetFileAttributes takes a non-negligible time, especially
4397 on non-local or removable filesystems. See stat_worker for an
4398 example of how to do that. */
4399static int
4400is_symlink (const char *filename)
4401{
4402 DWORD attrs;
4403 WIN32_FIND_DATA wfd;
4404 HANDLE fh;
4405
4406 attrs = GetFileAttributes (filename);
4407 if (attrs == -1)
4408 {
4409 DWORD w32err = GetLastError ();
4410
4411 switch (w32err)
4412 {
4413 case ERROR_BAD_NETPATH: /* network share, can't be a symlink */
4414 break;
4415 case ERROR_ACCESS_DENIED:
4416 errno = EACCES;
4417 break;
4418 case ERROR_FILE_NOT_FOUND:
4419 case ERROR_PATH_NOT_FOUND:
4420 default:
4421 errno = ENOENT;
4422 break;
4423 }
4424 return 0;
4425 }
4426 if ((attrs & FILE_ATTRIBUTE_REPARSE_POINT) == 0)
4427 return 0;
4428 logon_network_drive (filename);
4429 fh = FindFirstFile (filename, &wfd);
4430 if (fh == INVALID_HANDLE_VALUE)
4431 return 0;
4432 FindClose (fh);
4433 return (wfd.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) != 0
4434 && (wfd.dwReserved0 & IO_REPARSE_TAG_SYMLINK) == IO_REPARSE_TAG_SYMLINK;
4435}
4436
4437/* If NAME identifies a symbolic link, copy into BUF the file name of
4438 the symlink's target. Copy at most BUF_SIZE bytes, and do NOT
4439 null-terminate the target name, even if it fits. Return the number
4440 of bytes copied, or -1 if NAME is not a symlink or any error was
4441 encountered while resolving it. The file name copied into BUF is
4442 encoded in the current ANSI codepage. */
4443ssize_t
4444readlink (const char *name, char *buf, size_t buf_size)
4445{
4446 const char *path;
4447 TOKEN_PRIVILEGES privs;
4448 int restore_privs = 0;
4449 HANDLE sh;
4450 ssize_t retval;
4451
4452 if (name == NULL)
4453 {
4454 errno = EFAULT;
4455 return -1;
4456 }
4457 if (!*name)
4458 {
4459 errno = ENOENT;
4460 return -1;
4461 }
4462
4463 path = map_w32_filename (name, NULL);
4464
4465 if (strlen (path) > MAX_PATH)
4466 {
4467 errno = ENAMETOOLONG;
4468 return -1;
4469 }
4470
4471 errno = 0;
4472 if (is_windows_9x () == TRUE
4473 || (volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) == 0
4474 || !is_symlink (path))
4475 {
4476 if (!errno)
4477 errno = EINVAL; /* not a symlink */
4478 return -1;
4479 }
4480
4481 /* Done with simple tests, now we're in for some _real_ work. */
4482 if (enable_privilege (SE_BACKUP_NAME, TRUE, &privs))
4483 restore_privs = 1;
4484 /* Implementation note: From here and onward, don't return early,
4485 since that will fail to restore the original set of privileges of
4486 the calling thread. */
4487
4488 retval = -1; /* not too optimistic, are we? */
4489
4490 /* Note: In the next call to CreateFile, we use zero as the 2nd
4491 argument because, when the symlink is a hidden/system file,
4492 e.g. 'C:\Users\All Users', GENERIC_READ fails with
4493 ERROR_ACCESS_DENIED. Zero seems to work just fine, both for file
4494 and directory symlinks. */
4495 sh = CreateFile (path, 0, 0, NULL, OPEN_EXISTING,
4496 FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS,
4497 NULL);
4498 if (sh != INVALID_HANDLE_VALUE)
4499 {
4500 BYTE reparse_buf[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
4501 REPARSE_DATA_BUFFER *reparse_data = (REPARSE_DATA_BUFFER *)&reparse_buf[0];
4502 DWORD retbytes;
4503
4504 if (!DeviceIoControl (sh, FSCTL_GET_REPARSE_POINT, NULL, 0,
4505 reparse_buf, MAXIMUM_REPARSE_DATA_BUFFER_SIZE,
4506 &retbytes, NULL))
4507 errno = EIO;
4508 else if (reparse_data->ReparseTag != IO_REPARSE_TAG_SYMLINK)
4509 errno = EINVAL;
4510 else
4511 {
4512 /* Copy the link target name, in wide characters, from
4513 reparse_data, then convert it to multibyte encoding in
4514 the current locale's codepage. */
4515 WCHAR *lwname;
4516 BYTE lname[MAX_PATH];
4517 USHORT lname_len;
4518 USHORT lwname_len =
4519 reparse_data->SymbolicLinkReparseBuffer.PrintNameLength;
4520 WCHAR *lwname_src =
4521 reparse_data->SymbolicLinkReparseBuffer.PathBuffer
4522 + reparse_data->SymbolicLinkReparseBuffer.PrintNameOffset/sizeof(WCHAR);
4523
4524 /* According to MSDN, PrintNameLength does not include the
4525 terminating null character. */
4526 lwname = alloca ((lwname_len + 1) * sizeof(WCHAR));
4527 memcpy (lwname, lwname_src, lwname_len);
4528 lwname[lwname_len/sizeof(WCHAR)] = 0; /* null-terminate */
4529
4530 /* FIXME: Should we use the current file-name coding system
4531 instead of the fixed value of the ANSI codepage? */
4532 lname_len = WideCharToMultiByte (w32_ansi_code_page, 0, lwname, -1,
4533 lname, MAX_PATH, NULL, NULL);
4534 if (!lname_len)
4535 {
4536 /* WideCharToMultiByte failed. */
4537 DWORD w32err1 = GetLastError ();
4538
4539 switch (w32err1)
4540 {
4541 case ERROR_INSUFFICIENT_BUFFER:
4542 errno = ENAMETOOLONG;
4543 break;
4544 case ERROR_INVALID_PARAMETER:
4545 errno = EFAULT;
4546 break;
4547 case ERROR_NO_UNICODE_TRANSLATION:
4548 errno = ENOENT;
4549 break;
4550 default:
4551 errno = EINVAL;
4552 break;
4553 }
4554 }
4555 else
4556 {
4557 size_t size_to_copy = buf_size;
4558 BYTE *p = lname;
4559 BYTE *pend = p + lname_len;
4560
4561 /* Normalize like dostounix_filename does, but we don't
4562 want to assume that lname is null-terminated. */
4563 if (*p && p[1] == ':' && *p >= 'A' && *p <= 'Z')
4564 *p += 'a' - 'A';
4565 while (p <= pend)
4566 {
4567 if (*p == '\\')
4568 *p = '/';
4569 ++p;
4570 }
4571 /* Testing for null-terminated LNAME is paranoia:
4572 WideCharToMultiByte should always return a
4573 null-terminated string when its 4th argument is -1
4574 and its 3rd argument is null-terminated (which they
4575 are, see above). */
4576 if (lname[lname_len - 1] == '\0')
4577 lname_len--;
4578 if (lname_len <= buf_size)
4579 size_to_copy = lname_len;
4580 strncpy (buf, lname, size_to_copy);
4581 /* Success! */
4582 retval = size_to_copy;
4583 }
4584 }
4585 CloseHandle (sh);
4586 }
4587 else
4588 {
4589 /* CreateFile failed. */
4590 DWORD w32err2 = GetLastError ();
4591
4592 switch (w32err2)
4593 {
4594 case ERROR_FILE_NOT_FOUND:
4595 case ERROR_PATH_NOT_FOUND:
4596 errno = ENOENT;
4597 break;
4598 case ERROR_ACCESS_DENIED:
4599 case ERROR_TOO_MANY_OPEN_FILES:
4600 errno = EACCES;
4601 break;
4602 default:
4603 errno = EPERM;
4604 break;
4605 }
4606 }
4607 if (restore_privs)
4608 {
4609 restore_privilege (&privs);
4610 revert_to_self ();
4611 }
4612
4613 return retval;
4614}
4615
4616/* If FILE is a symlink, return its target (stored in a static
4617 buffer); otherwise return FILE.
4618
4619 This function repeatedly resolves symlinks in the last component of
4620 a chain of symlink file names, as in foo -> bar -> baz -> ...,
4621 until it arrives at a file whose last component is not a symlink,
4622 or some error occurs. It returns the target of the last
4623 successfully resolved symlink in the chain. If it succeeds to
4624 resolve even a single symlink, the value returned is an absolute
4625 file name with backslashes (result of GetFullPathName). By
4626 contrast, if the original FILE is returned, it is unaltered.
4627
4628 Note: This function can set errno even if it succeeds.
4629
4630 Implementation note: we only resolve the last portion ("basename")
4631 of the argument FILE and of each following file in the chain,
4632 disregarding any possible symlinks in its leading directories.
4633 This is because Windows system calls and library functions
4634 transparently resolve symlinks in leading directories and return
4635 correct information, as long as the basename is not a symlink. */
4636static char *
4637chase_symlinks (const char *file)
4638{
4639 static char target[MAX_PATH];
4640 char link[MAX_PATH];
4641 ssize_t res, link_len;
4642 int loop_count = 0;
4643
4644 if (is_windows_9x () == TRUE || !is_symlink (file))
4645 return (char *)file;
4646
4647 if ((link_len = GetFullPathName (file, MAX_PATH, link, NULL)) == 0)
4648 return (char *)file;
4649
4650 target[0] = '\0';
4651 do {
4652
4653 /* Remove trailing slashes, as we want to resolve the last
4654 non-trivial part of the link name. */
4655 while (link_len > 3 && IS_DIRECTORY_SEP (link[link_len-1]))
4656 link[link_len--] = '\0';
4657
4658 res = readlink (link, target, MAX_PATH);
4659 if (res > 0)
4660 {
4661 target[res] = '\0';
4662 if (!(IS_DEVICE_SEP (target[1])
4663 || (IS_DIRECTORY_SEP (target[0]) && IS_DIRECTORY_SEP (target[1]))))
4664 {
4665 /* Target is relative. Append it to the directory part of
4666 the symlink, then copy the result back to target. */
4667 char *p = link + link_len;
4668
4669 while (p > link && !IS_ANY_SEP (p[-1]))
4670 p--;
4671 strcpy (p, target);
4672 strcpy (target, link);
4673 }
4674 /* Resolve any "." and ".." to get a fully-qualified file name
4675 in link[] again. */
4676 link_len = GetFullPathName (target, MAX_PATH, link, NULL);
4677 }
4678 } while (res > 0 && link_len > 0 && ++loop_count <= 100);
4679
4680 if (loop_count > 100)
4681 errno = ELOOP;
4682
4683 if (target[0] == '\0') /* not a single call to readlink succeeded */
4684 return (char *)file;
4685 return target;
4686}
4687
4688\f
4689/* Posix ACL emulation. */
4690
4691int
4692acl_valid (acl_t acl)
4693{
4694 return is_valid_security_descriptor ((PSECURITY_DESCRIPTOR)acl) ? 0 : -1;
4695}
4696
4697char *
4698acl_to_text (acl_t acl, ssize_t *size)
4699{
4700 LPTSTR str_acl;
4701 SECURITY_INFORMATION flags =
4702 OWNER_SECURITY_INFORMATION |
4703 GROUP_SECURITY_INFORMATION |
4704 DACL_SECURITY_INFORMATION;
4705 char *retval = NULL;
4706 ULONG local_size;
4707 int e = errno;
4708
4709 errno = 0;
4710
4711 if (convert_sd_to_sddl ((PSECURITY_DESCRIPTOR)acl, SDDL_REVISION_1, flags, &str_acl, &local_size))
4712 {
4713 errno = e;
4714 /* We don't want to mix heaps, so we duplicate the string in our
4715 heap and free the one allocated by the API. */
4716 retval = xstrdup (str_acl);
4717 if (size)
4718 *size = local_size;
4719 LocalFree (str_acl);
4720 }
4721 else if (errno != ENOTSUP)
4722 errno = EINVAL;
4723
4724 return retval;
4725}
4726
4727acl_t
4728acl_from_text (const char *acl_str)
4729{
4730 PSECURITY_DESCRIPTOR psd, retval = NULL;
4731 ULONG sd_size;
4732 int e = errno;
4733
4734 errno = 0;
4735
4736 if (convert_sddl_to_sd (acl_str, SDDL_REVISION_1, &psd, &sd_size))
4737 {
4738 errno = e;
4739 retval = xmalloc (sd_size);
4740 memcpy (retval, psd, sd_size);
4741 LocalFree (psd);
4742 }
4743 else if (errno != ENOTSUP)
4744 errno = EINVAL;
4745
4746 return retval;
4747}
4748
4749int
4750acl_free (void *ptr)
4751{
4752 xfree (ptr);
4753 return 0;
4754}
4755
4756acl_t
4757acl_get_file (const char *fname, acl_type_t type)
4758{
4759 PSECURITY_DESCRIPTOR psd = NULL;
4760 const char *filename;
4761
4762 if (type == ACL_TYPE_ACCESS)
4763 {
4764 DWORD sd_len, err;
4765 SECURITY_INFORMATION si =
4766 OWNER_SECURITY_INFORMATION |
4767 GROUP_SECURITY_INFORMATION |
4768 DACL_SECURITY_INFORMATION ;
4769 int e = errno;
4770
4771 filename = map_w32_filename (fname, NULL);
4772 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
4773 fname = chase_symlinks (filename);
4774 else
4775 fname = filename;
4776
4777 errno = 0;
4778 if (!get_file_security (fname, si, psd, 0, &sd_len)
4779 && errno != ENOTSUP)
4780 {
4781 err = GetLastError ();
4782 if (err == ERROR_INSUFFICIENT_BUFFER)
4783 {
4784 psd = xmalloc (sd_len);
4785 if (!get_file_security (fname, si, psd, sd_len, &sd_len))
4786 {
4787 xfree (psd);
4788 errno = EIO;
4789 psd = NULL;
4790 }
4791 }
4792 else if (err == ERROR_FILE_NOT_FOUND
4793 || err == ERROR_PATH_NOT_FOUND)
4794 errno = ENOENT;
4795 else
4796 errno = EIO;
4797 }
4798 else if (!errno)
4799 errno = e;
4800 }
4801 else if (type != ACL_TYPE_DEFAULT)
4802 errno = EINVAL;
4803
4804 return psd;
4805}
4806
4807int
4808acl_set_file (const char *fname, acl_type_t type, acl_t acl)
4809{
4810 TOKEN_PRIVILEGES old1, old2;
4811 DWORD err;
4812 int st = 0, retval = -1;
4813 SECURITY_INFORMATION flags = 0;
4814 PSID psid;
4815 PACL pacl;
4816 BOOL dflt;
4817 BOOL dacl_present;
4818 int e;
4819 const char *filename;
4820
4821 if (acl_valid (acl) != 0
4822 || (type != ACL_TYPE_DEFAULT && type != ACL_TYPE_ACCESS))
4823 {
4824 errno = EINVAL;
4825 return -1;
4826 }
4827
4828 if (type == ACL_TYPE_DEFAULT)
4829 {
4830 errno = ENOSYS;
4831 return -1;
4832 }
4833
4834 filename = map_w32_filename (fname, NULL);
4835 if ((volume_info.flags & FILE_SUPPORTS_REPARSE_POINTS) != 0)
4836 fname = chase_symlinks (filename);
4837 else
4838 fname = filename;
4839
4840 if (get_security_descriptor_owner ((PSECURITY_DESCRIPTOR)acl, &psid, &dflt)
4841 && psid)
4842 flags |= OWNER_SECURITY_INFORMATION;
4843 if (get_security_descriptor_group ((PSECURITY_DESCRIPTOR)acl, &psid, &dflt)
4844 && psid)
4845 flags |= GROUP_SECURITY_INFORMATION;
4846 if (get_security_descriptor_dacl ((PSECURITY_DESCRIPTOR)acl, &dacl_present,
4847 &pacl, &dflt)
4848 && dacl_present)
4849 flags |= DACL_SECURITY_INFORMATION;
4850 if (!flags)
4851 return 0;
4852
4853 /* According to KB-245153, setting the owner will succeed if either:
4854 (1) the caller is the user who will be the new owner, and has the
4855 SE_TAKE_OWNERSHIP privilege, or
4856 (2) the caller has the SE_RESTORE privilege, in which case she can
4857 set any valid user or group as the owner
4858
4859 We request below both SE_TAKE_OWNERSHIP and SE_RESTORE
4860 privileges, and disregard any failures in obtaining them. If
4861 these privileges cannot be obtained, and do not already exist in
4862 the calling thread's security token, this function could fail
4863 with EPERM. */
4864 if (enable_privilege (SE_TAKE_OWNERSHIP_NAME, TRUE, &old1))
4865 st++;
4866 if (enable_privilege (SE_RESTORE_NAME, TRUE, &old2))
4867 st++;
4868
4869 e = errno;
4870 errno = 0;
4871 set_file_security ((char *)fname, flags, (PSECURITY_DESCRIPTOR)acl);
4872 err = GetLastError ();
4873 if (st)
4874 {
4875 if (st >= 2)
4876 restore_privilege (&old2);
4877 restore_privilege (&old1);
4878 revert_to_self ();
4879 }
4880
4881 if (errno == ENOTSUP)
4882 ;
4883 else if (err == ERROR_SUCCESS)
4884 {
4885 retval = 0;
4886 errno = e;
4887 }
4888 else if (err == ERROR_INVALID_OWNER || err == ERROR_NOT_ALL_ASSIGNED
4889 || err == ERROR_ACCESS_DENIED)
4890 {
4891 /* Maybe the requested ACL and the one the file already has are
4892 identical, in which case we can silently ignore the
4893 failure. (And no, Windows doesn't.) */
4894 acl_t current_acl = acl_get_file (fname, ACL_TYPE_ACCESS);
4895
4896 errno = EPERM;
4897 if (current_acl)
4898 {
4899 char *acl_from = acl_to_text (current_acl, NULL);
4900 char *acl_to = acl_to_text (acl, NULL);
4901
4902 if (acl_from && acl_to && xstrcasecmp (acl_from, acl_to) == 0)
4903 {
4904 retval = 0;
4905 errno = e;
4906 }
4907 if (acl_from)
4908 acl_free (acl_from);
4909 if (acl_to)
4910 acl_free (acl_to);
4911 acl_free (current_acl);
4912 }
4913 }
4914 else if (err == ERROR_FILE_NOT_FOUND || err == ERROR_PATH_NOT_FOUND)
4915 errno = ENOENT;
4916
4917 return retval;
4918}
4919
4920\f
4921/* MS-Windows version of careadlinkat (cf. ../lib/careadlinkat.c). We
4922 have a fixed max size for file names, so we don't need the kind of
4923 alloc/malloc/realloc dance the gnulib version does. We also don't
4924 support FD-relative symlinks. */
4925char *
4926careadlinkat (int fd, char const *filename,
4927 char *buffer, size_t buffer_size,
4928 struct allocator const *alloc,
4929 ssize_t (*preadlinkat) (int, char const *, char *, size_t))
4930{
4931 char linkname[MAX_PATH];
4932 ssize_t link_size;
4933
4934 if (fd != AT_FDCWD)
4935 {
4936 errno = EINVAL;
4937 return NULL;
4938 }
4939
4940 link_size = preadlinkat (fd, filename, linkname, sizeof(linkname));
4941
4942 if (link_size > 0)
4943 {
4944 char *retval = buffer;
4945
4946 linkname[link_size++] = '\0';
4947 if (link_size > buffer_size)
4948 retval = (char *)(alloc ? alloc->allocate : xmalloc) (link_size);
4949 if (retval)
4950 memcpy (retval, linkname, link_size);
4951
4952 return retval;
4953 }
4954 return NULL;
4955}
4956
4957ssize_t
4958careadlinkatcwd (int fd, char const *filename, char *buffer,
4959 size_t buffer_size)
4960{
4961 (void) fd;
4962 return readlink (filename, buffer, buffer_size);
4963}
4964
4965\f
4966/* Support for browsing other processes and their attributes. See
4967 process.c for the Lisp bindings. */
4968
4969/* Helper wrapper functions. */
4970
4971static HANDLE WINAPI
4972create_toolhelp32_snapshot (DWORD Flags, DWORD Ignored)
4973{
4974 static CreateToolhelp32Snapshot_Proc s_pfn_Create_Toolhelp32_Snapshot = NULL;
4975
4976 if (g_b_init_create_toolhelp32_snapshot == 0)
4977 {
4978 g_b_init_create_toolhelp32_snapshot = 1;
4979 s_pfn_Create_Toolhelp32_Snapshot = (CreateToolhelp32Snapshot_Proc)
4980 GetProcAddress (GetModuleHandle ("kernel32.dll"),
4981 "CreateToolhelp32Snapshot");
4982 }
4983 if (s_pfn_Create_Toolhelp32_Snapshot == NULL)
4984 {
4985 return INVALID_HANDLE_VALUE;
4986 }
4987 return (s_pfn_Create_Toolhelp32_Snapshot (Flags, Ignored));
4988}
4989
4990static BOOL WINAPI
4991process32_first (HANDLE hSnapshot, LPPROCESSENTRY32 lppe)
4992{
4993 static Process32First_Proc s_pfn_Process32_First = NULL;
4994
4995 if (g_b_init_process32_first == 0)
4996 {
4997 g_b_init_process32_first = 1;
4998 s_pfn_Process32_First = (Process32First_Proc)
4999 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5000 "Process32First");
5001 }
5002 if (s_pfn_Process32_First == NULL)
5003 {
5004 return FALSE;
5005 }
5006 return (s_pfn_Process32_First (hSnapshot, lppe));
5007}
5008
5009static BOOL WINAPI
5010process32_next (HANDLE hSnapshot, LPPROCESSENTRY32 lppe)
5011{
5012 static Process32Next_Proc s_pfn_Process32_Next = NULL;
5013
5014 if (g_b_init_process32_next == 0)
5015 {
5016 g_b_init_process32_next = 1;
5017 s_pfn_Process32_Next = (Process32Next_Proc)
5018 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5019 "Process32Next");
5020 }
5021 if (s_pfn_Process32_Next == NULL)
5022 {
5023 return FALSE;
5024 }
5025 return (s_pfn_Process32_Next (hSnapshot, lppe));
5026}
5027
5028static BOOL WINAPI
5029open_thread_token (HANDLE ThreadHandle,
5030 DWORD DesiredAccess,
5031 BOOL OpenAsSelf,
5032 PHANDLE TokenHandle)
5033{
5034 static OpenThreadToken_Proc s_pfn_Open_Thread_Token = NULL;
5035 HMODULE hm_advapi32 = NULL;
5036 if (is_windows_9x () == TRUE)
5037 {
5038 SetLastError (ERROR_NOT_SUPPORTED);
5039 return FALSE;
5040 }
5041 if (g_b_init_open_thread_token == 0)
5042 {
5043 g_b_init_open_thread_token = 1;
5044 hm_advapi32 = LoadLibrary ("Advapi32.dll");
5045 s_pfn_Open_Thread_Token =
5046 (OpenThreadToken_Proc) GetProcAddress (hm_advapi32, "OpenThreadToken");
5047 }
5048 if (s_pfn_Open_Thread_Token == NULL)
5049 {
5050 SetLastError (ERROR_NOT_SUPPORTED);
5051 return FALSE;
5052 }
5053 return (
5054 s_pfn_Open_Thread_Token (
5055 ThreadHandle,
5056 DesiredAccess,
5057 OpenAsSelf,
5058 TokenHandle)
5059 );
5060}
5061
5062static BOOL WINAPI
5063impersonate_self (SECURITY_IMPERSONATION_LEVEL ImpersonationLevel)
5064{
5065 static ImpersonateSelf_Proc s_pfn_Impersonate_Self = NULL;
5066 HMODULE hm_advapi32 = NULL;
5067 if (is_windows_9x () == TRUE)
5068 {
5069 return FALSE;
5070 }
5071 if (g_b_init_impersonate_self == 0)
5072 {
5073 g_b_init_impersonate_self = 1;
5074 hm_advapi32 = LoadLibrary ("Advapi32.dll");
5075 s_pfn_Impersonate_Self =
5076 (ImpersonateSelf_Proc) GetProcAddress (hm_advapi32, "ImpersonateSelf");
5077 }
5078 if (s_pfn_Impersonate_Self == NULL)
5079 {
5080 return FALSE;
5081 }
5082 return s_pfn_Impersonate_Self (ImpersonationLevel);
5083}
5084
5085static BOOL WINAPI
5086revert_to_self (void)
5087{
5088 static RevertToSelf_Proc s_pfn_Revert_To_Self = NULL;
5089 HMODULE hm_advapi32 = NULL;
5090 if (is_windows_9x () == TRUE)
5091 {
5092 return FALSE;
5093 }
5094 if (g_b_init_revert_to_self == 0)
5095 {
5096 g_b_init_revert_to_self = 1;
5097 hm_advapi32 = LoadLibrary ("Advapi32.dll");
5098 s_pfn_Revert_To_Self =
5099 (RevertToSelf_Proc) GetProcAddress (hm_advapi32, "RevertToSelf");
5100 }
5101 if (s_pfn_Revert_To_Self == NULL)
5102 {
5103 return FALSE;
5104 }
5105 return s_pfn_Revert_To_Self ();
5106}
5107
5108static BOOL WINAPI
5109get_process_memory_info (HANDLE h_proc,
5110 PPROCESS_MEMORY_COUNTERS mem_counters,
5111 DWORD bufsize)
5112{
5113 static GetProcessMemoryInfo_Proc s_pfn_Get_Process_Memory_Info = NULL;
5114 HMODULE hm_psapi = NULL;
5115 if (is_windows_9x () == TRUE)
5116 {
5117 return FALSE;
5118 }
5119 if (g_b_init_get_process_memory_info == 0)
5120 {
5121 g_b_init_get_process_memory_info = 1;
5122 hm_psapi = LoadLibrary ("Psapi.dll");
5123 if (hm_psapi)
5124 s_pfn_Get_Process_Memory_Info = (GetProcessMemoryInfo_Proc)
5125 GetProcAddress (hm_psapi, "GetProcessMemoryInfo");
5126 }
5127 if (s_pfn_Get_Process_Memory_Info == NULL)
5128 {
5129 return FALSE;
5130 }
5131 return s_pfn_Get_Process_Memory_Info (h_proc, mem_counters, bufsize);
5132}
5133
5134static BOOL WINAPI
5135get_process_working_set_size (HANDLE h_proc,
5136 PSIZE_T minrss,
5137 PSIZE_T maxrss)
5138{
5139 static GetProcessWorkingSetSize_Proc
5140 s_pfn_Get_Process_Working_Set_Size = NULL;
5141
5142 if (is_windows_9x () == TRUE)
5143 {
5144 return FALSE;
5145 }
5146 if (g_b_init_get_process_working_set_size == 0)
5147 {
5148 g_b_init_get_process_working_set_size = 1;
5149 s_pfn_Get_Process_Working_Set_Size = (GetProcessWorkingSetSize_Proc)
5150 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5151 "GetProcessWorkingSetSize");
5152 }
5153 if (s_pfn_Get_Process_Working_Set_Size == NULL)
5154 {
5155 return FALSE;
5156 }
5157 return s_pfn_Get_Process_Working_Set_Size (h_proc, minrss, maxrss);
5158}
5159
5160static BOOL WINAPI
5161global_memory_status (MEMORYSTATUS *buf)
5162{
5163 static GlobalMemoryStatus_Proc s_pfn_Global_Memory_Status = NULL;
5164
5165 if (is_windows_9x () == TRUE)
5166 {
5167 return FALSE;
5168 }
5169 if (g_b_init_global_memory_status == 0)
5170 {
5171 g_b_init_global_memory_status = 1;
5172 s_pfn_Global_Memory_Status = (GlobalMemoryStatus_Proc)
5173 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5174 "GlobalMemoryStatus");
5175 }
5176 if (s_pfn_Global_Memory_Status == NULL)
5177 {
5178 return FALSE;
5179 }
5180 return s_pfn_Global_Memory_Status (buf);
5181}
5182
5183static BOOL WINAPI
5184global_memory_status_ex (MEMORY_STATUS_EX *buf)
5185{
5186 static GlobalMemoryStatusEx_Proc s_pfn_Global_Memory_Status_Ex = NULL;
5187
5188 if (is_windows_9x () == TRUE)
5189 {
5190 return FALSE;
5191 }
5192 if (g_b_init_global_memory_status_ex == 0)
5193 {
5194 g_b_init_global_memory_status_ex = 1;
5195 s_pfn_Global_Memory_Status_Ex = (GlobalMemoryStatusEx_Proc)
5196 GetProcAddress (GetModuleHandle ("kernel32.dll"),
5197 "GlobalMemoryStatusEx");
5198 }
5199 if (s_pfn_Global_Memory_Status_Ex == NULL)
5200 {
5201 return FALSE;
5202 }
5203 return s_pfn_Global_Memory_Status_Ex (buf);
5204}
5205
5206Lisp_Object
5207list_system_processes (void)
5208{
5209 struct gcpro gcpro1;
5210 Lisp_Object proclist = Qnil;
5211 HANDLE h_snapshot;
5212
5213 h_snapshot = create_toolhelp32_snapshot (TH32CS_SNAPPROCESS, 0);
5214
5215 if (h_snapshot != INVALID_HANDLE_VALUE)
5216 {
5217 PROCESSENTRY32 proc_entry;
5218 DWORD proc_id;
5219 BOOL res;
5220
5221 GCPRO1 (proclist);
5222
5223 proc_entry.dwSize = sizeof (PROCESSENTRY32);
5224 for (res = process32_first (h_snapshot, &proc_entry); res;
5225 res = process32_next (h_snapshot, &proc_entry))
5226 {
5227 proc_id = proc_entry.th32ProcessID;
5228 proclist = Fcons (make_fixnum_or_float (proc_id), proclist);
5229 }
5230
5231 CloseHandle (h_snapshot);
5232 UNGCPRO;
5233 proclist = Fnreverse (proclist);
5234 }
5235
5236 return proclist;
5237}
5238
5239static int
5240enable_privilege (LPCTSTR priv_name, BOOL enable_p, TOKEN_PRIVILEGES *old_priv)
5241{
5242 TOKEN_PRIVILEGES priv;
5243 DWORD priv_size = sizeof (priv);
5244 DWORD opriv_size = sizeof (*old_priv);
5245 HANDLE h_token = NULL;
5246 HANDLE h_thread = GetCurrentThread ();
5247 int ret_val = 0;
5248 BOOL res;
5249
5250 res = open_thread_token (h_thread,
5251 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
5252 FALSE, &h_token);
5253 if (!res && GetLastError () == ERROR_NO_TOKEN)
5254 {
5255 if (impersonate_self (SecurityImpersonation))
5256 res = open_thread_token (h_thread,
5257 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
5258 FALSE, &h_token);
5259 }
5260 if (res)
5261 {
5262 priv.PrivilegeCount = 1;
5263 priv.Privileges[0].Attributes = enable_p ? SE_PRIVILEGE_ENABLED : 0;
5264 LookupPrivilegeValue (NULL, priv_name, &priv.Privileges[0].Luid);
5265 if (AdjustTokenPrivileges (h_token, FALSE, &priv, priv_size,
5266 old_priv, &opriv_size)
5267 && GetLastError () != ERROR_NOT_ALL_ASSIGNED)
5268 ret_val = 1;
5269 }
5270 if (h_token)
5271 CloseHandle (h_token);
5272
5273 return ret_val;
5274}
5275
5276static int
5277restore_privilege (TOKEN_PRIVILEGES *priv)
5278{
5279 DWORD priv_size = sizeof (*priv);
5280 HANDLE h_token = NULL;
5281 int ret_val = 0;
5282
5283 if (open_thread_token (GetCurrentThread (),
5284 TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
5285 FALSE, &h_token))
5286 {
5287 if (AdjustTokenPrivileges (h_token, FALSE, priv, priv_size, NULL, NULL)
5288 && GetLastError () != ERROR_NOT_ALL_ASSIGNED)
5289 ret_val = 1;
5290 }
5291 if (h_token)
5292 CloseHandle (h_token);
5293
5294 return ret_val;
5295}
5296
5297static Lisp_Object
5298ltime (ULONGLONG time_100ns)
5299{
5300 ULONGLONG time_sec = time_100ns / 10000000;
5301 int subsec = time_100ns % 10000000;
5302 return list4 (make_number (time_sec >> 16),
5303 make_number (time_sec & 0xffff),
5304 make_number (subsec / 10),
5305 make_number (subsec % 10 * 100000));
5306}
5307
5308#define U64_TO_LISP_TIME(time) ltime (time)
5309
5310static int
5311process_times (HANDLE h_proc, Lisp_Object *ctime, Lisp_Object *etime,
5312 Lisp_Object *stime, Lisp_Object *utime, Lisp_Object *ttime,
5313 double *pcpu)
5314{
5315 FILETIME ft_creation, ft_exit, ft_kernel, ft_user, ft_current;
5316 ULONGLONG tem1, tem2, tem3, tem;
5317
5318 if (!h_proc
5319 || !get_process_times_fn
5320 || !(*get_process_times_fn) (h_proc, &ft_creation, &ft_exit,
5321 &ft_kernel, &ft_user))
5322 return 0;
5323
5324 GetSystemTimeAsFileTime (&ft_current);
5325
5326 FILETIME_TO_U64 (tem1, ft_kernel);
5327 *stime = U64_TO_LISP_TIME (tem1);
5328
5329 FILETIME_TO_U64 (tem2, ft_user);
5330 *utime = U64_TO_LISP_TIME (tem2);
5331
5332 tem3 = tem1 + tem2;
5333 *ttime = U64_TO_LISP_TIME (tem3);
5334
5335 FILETIME_TO_U64 (tem, ft_creation);
5336 /* Process no 4 (System) returns zero creation time. */
5337 if (tem)
5338 tem -= utc_base;
5339 *ctime = U64_TO_LISP_TIME (tem);
5340
5341 if (tem)
5342 {
5343 FILETIME_TO_U64 (tem3, ft_current);
5344 tem = (tem3 - utc_base) - tem;
5345 }
5346 *etime = U64_TO_LISP_TIME (tem);
5347
5348 if (tem)
5349 {
5350 *pcpu = 100.0 * (tem1 + tem2) / tem;
5351 if (*pcpu > 100)
5352 *pcpu = 100.0;
5353 }
5354 else
5355 *pcpu = 0;
5356
5357 return 1;
5358}
5359
5360Lisp_Object
5361system_process_attributes (Lisp_Object pid)
5362{
5363 struct gcpro gcpro1, gcpro2, gcpro3;
5364 Lisp_Object attrs = Qnil;
5365 Lisp_Object cmd_str, decoded_cmd, tem;
5366 HANDLE h_snapshot, h_proc;
5367 DWORD proc_id;
5368 int found_proc = 0;
5369 char uname[UNLEN+1], gname[GNLEN+1], domain[1025];
5370 DWORD ulength = sizeof (uname), dlength = sizeof (domain), needed;
5371 DWORD glength = sizeof (gname);
5372 HANDLE token = NULL;
5373 SID_NAME_USE user_type;
5374 unsigned char *buf = NULL;
5375 DWORD blen = 0;
5376 TOKEN_USER user_token;
5377 TOKEN_PRIMARY_GROUP group_token;
5378 unsigned euid;
5379 unsigned egid;
5380 PROCESS_MEMORY_COUNTERS mem;
5381 PROCESS_MEMORY_COUNTERS_EX mem_ex;
5382 SIZE_T minrss, maxrss;
5383 MEMORYSTATUS memst;
5384 MEMORY_STATUS_EX memstex;
5385 double totphys = 0.0;
5386 Lisp_Object ctime, stime, utime, etime, ttime;
5387 double pcpu;
5388 BOOL result = FALSE;
5389
5390 CHECK_NUMBER_OR_FLOAT (pid);
5391 proc_id = FLOATP (pid) ? XFLOAT_DATA (pid) : XINT (pid);
5392
5393 h_snapshot = create_toolhelp32_snapshot (TH32CS_SNAPPROCESS, 0);
5394
5395 GCPRO3 (attrs, decoded_cmd, tem);
5396
5397 if (h_snapshot != INVALID_HANDLE_VALUE)
5398 {
5399 PROCESSENTRY32 pe;
5400 BOOL res;
5401
5402 pe.dwSize = sizeof (PROCESSENTRY32);
5403 for (res = process32_first (h_snapshot, &pe); res;
5404 res = process32_next (h_snapshot, &pe))
5405 {
5406 if (proc_id == pe.th32ProcessID)
5407 {
5408 if (proc_id == 0)
5409 decoded_cmd = build_string ("Idle");
5410 else
5411 {
5412 /* Decode the command name from locale-specific
5413 encoding. */
5414 cmd_str = make_unibyte_string (pe.szExeFile,
5415 strlen (pe.szExeFile));
5416 decoded_cmd =
5417 code_convert_string_norecord (cmd_str,
5418 Vlocale_coding_system, 0);
5419 }
5420 attrs = Fcons (Fcons (Qcomm, decoded_cmd), attrs);
5421 attrs = Fcons (Fcons (Qppid,
5422 make_fixnum_or_float (pe.th32ParentProcessID)),
5423 attrs);
5424 attrs = Fcons (Fcons (Qpri, make_number (pe.pcPriClassBase)),
5425 attrs);
5426 attrs = Fcons (Fcons (Qthcount,
5427 make_fixnum_or_float (pe.cntThreads)),
5428 attrs);
5429 found_proc = 1;
5430 break;
5431 }
5432 }
5433
5434 CloseHandle (h_snapshot);
5435 }
5436
5437 if (!found_proc)
5438 {
5439 UNGCPRO;
5440 return Qnil;
5441 }
5442
5443 h_proc = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
5444 FALSE, proc_id);
5445 /* If we were denied a handle to the process, try again after
5446 enabling the SeDebugPrivilege in our process. */
5447 if (!h_proc)
5448 {
5449 TOKEN_PRIVILEGES priv_current;
5450
5451 if (enable_privilege (SE_DEBUG_NAME, TRUE, &priv_current))
5452 {
5453 h_proc = OpenProcess (PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
5454 FALSE, proc_id);
5455 restore_privilege (&priv_current);
5456 revert_to_self ();
5457 }
5458 }
5459 if (h_proc)
5460 {
5461 result = open_process_token (h_proc, TOKEN_QUERY, &token);
5462 if (result)
5463 {
5464 result = get_token_information (token, TokenUser, NULL, 0, &blen);
5465 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
5466 {
5467 buf = xmalloc (blen);
5468 result = get_token_information (token, TokenUser,
5469 (LPVOID)buf, blen, &needed);
5470 if (result)
5471 {
5472 memcpy (&user_token, buf, sizeof (user_token));
5473 if (!w32_cached_id (user_token.User.Sid, &euid, uname))
5474 {
5475 euid = get_rid (user_token.User.Sid);
5476 result = lookup_account_sid (NULL, user_token.User.Sid,
5477 uname, &ulength,
5478 domain, &dlength,
5479 &user_type);
5480 if (result)
5481 w32_add_to_cache (user_token.User.Sid, euid, uname);
5482 else
5483 {
5484 strcpy (uname, "unknown");
5485 result = TRUE;
5486 }
5487 }
5488 ulength = strlen (uname);
5489 }
5490 }
5491 }
5492 if (result)
5493 {
5494 /* Determine a reasonable euid and gid values. */
5495 if (xstrcasecmp ("administrator", uname) == 0)
5496 {
5497 euid = 500; /* well-known Administrator uid */
5498 egid = 513; /* well-known None gid */
5499 }
5500 else
5501 {
5502 /* Get group id and name. */
5503 result = get_token_information (token, TokenPrimaryGroup,
5504 (LPVOID)buf, blen, &needed);
5505 if (!result && GetLastError () == ERROR_INSUFFICIENT_BUFFER)
5506 {
5507 buf = xrealloc (buf, blen = needed);
5508 result = get_token_information (token, TokenPrimaryGroup,
5509 (LPVOID)buf, blen, &needed);
5510 }
5511 if (result)
5512 {
5513 memcpy (&group_token, buf, sizeof (group_token));
5514 if (!w32_cached_id (group_token.PrimaryGroup, &egid, gname))
5515 {
5516 egid = get_rid (group_token.PrimaryGroup);
5517 dlength = sizeof (domain);
5518 result =
5519 lookup_account_sid (NULL, group_token.PrimaryGroup,
5520 gname, &glength, NULL, &dlength,
5521 &user_type);
5522 if (result)
5523 w32_add_to_cache (group_token.PrimaryGroup,
5524 egid, gname);
5525 else
5526 {
5527 strcpy (gname, "None");
5528 result = TRUE;
5529 }
5530 }
5531 glength = strlen (gname);
5532 }
5533 }
5534 }
5535 xfree (buf);
5536 }
5537 if (!result)
5538 {
5539 if (!is_windows_9x ())
5540 {
5541 /* We couldn't open the process token, presumably because of
5542 insufficient access rights. Assume this process is run
5543 by the system. */
5544 strcpy (uname, "SYSTEM");
5545 strcpy (gname, "None");
5546 euid = 18; /* SYSTEM */
5547 egid = 513; /* None */
5548 glength = strlen (gname);
5549 ulength = strlen (uname);
5550 }
5551 /* If we are running under Windows 9X, where security calls are
5552 not supported, we assume all processes are run by the current
5553 user. */
5554 else if (GetUserName (uname, &ulength))
5555 {
5556 if (xstrcasecmp ("administrator", uname) == 0)
5557 euid = 0;
5558 else
5559 euid = 123;
5560 egid = euid;
5561 strcpy (gname, "None");
5562 glength = strlen (gname);
5563 ulength = strlen (uname);
5564 }
5565 else
5566 {
5567 euid = 123;
5568 egid = 123;
5569 strcpy (uname, "administrator");
5570 ulength = strlen (uname);
5571 strcpy (gname, "None");
5572 glength = strlen (gname);
5573 }
5574 if (token)
5575 CloseHandle (token);
5576 }
5577
5578 attrs = Fcons (Fcons (Qeuid, make_fixnum_or_float (euid)), attrs);
5579 tem = make_unibyte_string (uname, ulength);
5580 attrs = Fcons (Fcons (Quser,
5581 code_convert_string_norecord (tem, Vlocale_coding_system, 0)),
5582 attrs);
5583 attrs = Fcons (Fcons (Qegid, make_fixnum_or_float (egid)), attrs);
5584 tem = make_unibyte_string (gname, glength);
5585 attrs = Fcons (Fcons (Qgroup,
5586 code_convert_string_norecord (tem, Vlocale_coding_system, 0)),
5587 attrs);
5588
5589 if (global_memory_status_ex (&memstex))
5590#if __GNUC__ || (defined (_MSC_VER) && _MSC_VER >= 1300)
5591 totphys = memstex.ullTotalPhys / 1024.0;
5592#else
5593 /* Visual Studio 6 cannot convert an unsigned __int64 type to
5594 double, so we need to do this for it... */
5595 {
5596 DWORD tot_hi = memstex.ullTotalPhys >> 32;
5597 DWORD tot_md = (memstex.ullTotalPhys & 0x00000000ffffffff) >> 10;
5598 DWORD tot_lo = memstex.ullTotalPhys % 1024;
5599
5600 totphys = tot_hi * 4194304.0 + tot_md + tot_lo / 1024.0;
5601 }
5602#endif /* __GNUC__ || _MSC_VER >= 1300 */
5603 else if (global_memory_status (&memst))
5604 totphys = memst.dwTotalPhys / 1024.0;
5605
5606 if (h_proc
5607 && get_process_memory_info (h_proc, (PROCESS_MEMORY_COUNTERS *)&mem_ex,
5608 sizeof (mem_ex)))
5609 {
5610 SIZE_T rss = mem_ex.WorkingSetSize / 1024;
5611
5612 attrs = Fcons (Fcons (Qmajflt,
5613 make_fixnum_or_float (mem_ex.PageFaultCount)),
5614 attrs);
5615 attrs = Fcons (Fcons (Qvsize,
5616 make_fixnum_or_float (mem_ex.PrivateUsage / 1024)),
5617 attrs);
5618 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (rss)), attrs);
5619 if (totphys)
5620 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
5621 }
5622 else if (h_proc
5623 && get_process_memory_info (h_proc, &mem, sizeof (mem)))
5624 {
5625 SIZE_T rss = mem_ex.WorkingSetSize / 1024;
5626
5627 attrs = Fcons (Fcons (Qmajflt,
5628 make_fixnum_or_float (mem.PageFaultCount)),
5629 attrs);
5630 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (rss)), attrs);
5631 if (totphys)
5632 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
5633 }
5634 else if (h_proc
5635 && get_process_working_set_size (h_proc, &minrss, &maxrss))
5636 {
5637 DWORD rss = maxrss / 1024;
5638
5639 attrs = Fcons (Fcons (Qrss, make_fixnum_or_float (maxrss / 1024)), attrs);
5640 if (totphys)
5641 attrs = Fcons (Fcons (Qpmem, make_float (100. * rss / totphys)), attrs);
5642 }
5643
5644 if (process_times (h_proc, &ctime, &etime, &stime, &utime, &ttime, &pcpu))
5645 {
5646 attrs = Fcons (Fcons (Qutime, utime), attrs);
5647 attrs = Fcons (Fcons (Qstime, stime), attrs);
5648 attrs = Fcons (Fcons (Qtime, ttime), attrs);
5649 attrs = Fcons (Fcons (Qstart, ctime), attrs);
5650 attrs = Fcons (Fcons (Qetime, etime), attrs);
5651 attrs = Fcons (Fcons (Qpcpu, make_float (pcpu)), attrs);
5652 }
5653
5654 /* FIXME: Retrieve command line by walking the PEB of the process. */
5655
5656 if (h_proc)
5657 CloseHandle (h_proc);
5658 UNGCPRO;
5659 return attrs;
5660}
5661
5662\f
5663/* Wrappers for winsock functions to map between our file descriptors
5664 and winsock's handles; also set h_errno for convenience.
5665
5666 To allow Emacs to run on systems which don't have winsock support
5667 installed, we dynamically link to winsock on startup if present, and
5668 otherwise provide the minimum necessary functionality
5669 (eg. gethostname). */
5670
5671/* function pointers for relevant socket functions */
5672int (PASCAL *pfn_WSAStartup) (WORD wVersionRequired, LPWSADATA lpWSAData);
5673void (PASCAL *pfn_WSASetLastError) (int iError);
5674int (PASCAL *pfn_WSAGetLastError) (void);
5675int (PASCAL *pfn_WSAEventSelect) (SOCKET s, HANDLE hEventObject, long lNetworkEvents);
5676HANDLE (PASCAL *pfn_WSACreateEvent) (void);
5677int (PASCAL *pfn_WSACloseEvent) (HANDLE hEvent);
5678int (PASCAL *pfn_socket) (int af, int type, int protocol);
5679int (PASCAL *pfn_bind) (SOCKET s, const struct sockaddr *addr, int namelen);
5680int (PASCAL *pfn_connect) (SOCKET s, const struct sockaddr *addr, int namelen);
5681int (PASCAL *pfn_ioctlsocket) (SOCKET s, long cmd, u_long *argp);
5682int (PASCAL *pfn_recv) (SOCKET s, char * buf, int len, int flags);
5683int (PASCAL *pfn_send) (SOCKET s, const char * buf, int len, int flags);
5684int (PASCAL *pfn_closesocket) (SOCKET s);
5685int (PASCAL *pfn_shutdown) (SOCKET s, int how);
5686int (PASCAL *pfn_WSACleanup) (void);
5687
5688u_short (PASCAL *pfn_htons) (u_short hostshort);
5689u_short (PASCAL *pfn_ntohs) (u_short netshort);
5690unsigned long (PASCAL *pfn_inet_addr) (const char * cp);
5691int (PASCAL *pfn_gethostname) (char * name, int namelen);
5692struct hostent * (PASCAL *pfn_gethostbyname) (const char * name);
5693struct servent * (PASCAL *pfn_getservbyname) (const char * name, const char * proto);
5694int (PASCAL *pfn_getpeername) (SOCKET s, struct sockaddr *addr, int * namelen);
5695int (PASCAL *pfn_setsockopt) (SOCKET s, int level, int optname,
5696 const char * optval, int optlen);
5697int (PASCAL *pfn_listen) (SOCKET s, int backlog);
5698int (PASCAL *pfn_getsockname) (SOCKET s, struct sockaddr * name,
5699 int * namelen);
5700SOCKET (PASCAL *pfn_accept) (SOCKET s, struct sockaddr * addr, int * addrlen);
5701int (PASCAL *pfn_recvfrom) (SOCKET s, char * buf, int len, int flags,
5702 struct sockaddr * from, int * fromlen);
5703int (PASCAL *pfn_sendto) (SOCKET s, const char * buf, int len, int flags,
5704 const struct sockaddr * to, int tolen);
5705
5706/* SetHandleInformation is only needed to make sockets non-inheritable. */
5707BOOL (WINAPI *pfn_SetHandleInformation) (HANDLE object, DWORD mask, DWORD flags);
5708#ifndef HANDLE_FLAG_INHERIT
5709#define HANDLE_FLAG_INHERIT 1
5710#endif
5711
5712HANDLE winsock_lib;
5713static int winsock_inuse;
5714
5715BOOL
5716term_winsock (void)
5717{
5718 if (winsock_lib != NULL && winsock_inuse == 0)
5719 {
5720 /* Not sure what would cause WSAENETDOWN, or even if it can happen
5721 after WSAStartup returns successfully, but it seems reasonable
5722 to allow unloading winsock anyway in that case. */
5723 if (pfn_WSACleanup () == 0 ||
5724 pfn_WSAGetLastError () == WSAENETDOWN)
5725 {
5726 if (FreeLibrary (winsock_lib))
5727 winsock_lib = NULL;
5728 return TRUE;
5729 }
5730 }
5731 return FALSE;
5732}
5733
5734BOOL
5735init_winsock (int load_now)
5736{
5737 WSADATA winsockData;
5738
5739 if (winsock_lib != NULL)
5740 return TRUE;
5741
5742 pfn_SetHandleInformation
5743 = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"),
5744 "SetHandleInformation");
5745
5746 winsock_lib = LoadLibrary ("Ws2_32.dll");
5747
5748 if (winsock_lib != NULL)
5749 {
5750 /* dynamically link to socket functions */
5751
5752#define LOAD_PROC(fn) \
5753 if ((pfn_##fn = (void *) GetProcAddress (winsock_lib, #fn)) == NULL) \
5754 goto fail;
5755
5756 LOAD_PROC (WSAStartup);
5757 LOAD_PROC (WSASetLastError);
5758 LOAD_PROC (WSAGetLastError);
5759 LOAD_PROC (WSAEventSelect);
5760 LOAD_PROC (WSACreateEvent);
5761 LOAD_PROC (WSACloseEvent);
5762 LOAD_PROC (socket);
5763 LOAD_PROC (bind);
5764 LOAD_PROC (connect);
5765 LOAD_PROC (ioctlsocket);
5766 LOAD_PROC (recv);
5767 LOAD_PROC (send);
5768 LOAD_PROC (closesocket);
5769 LOAD_PROC (shutdown);
5770 LOAD_PROC (htons);
5771 LOAD_PROC (ntohs);
5772 LOAD_PROC (inet_addr);
5773 LOAD_PROC (gethostname);
5774 LOAD_PROC (gethostbyname);
5775 LOAD_PROC (getservbyname);
5776 LOAD_PROC (getpeername);
5777 LOAD_PROC (WSACleanup);
5778 LOAD_PROC (setsockopt);
5779 LOAD_PROC (listen);
5780 LOAD_PROC (getsockname);
5781 LOAD_PROC (accept);
5782 LOAD_PROC (recvfrom);
5783 LOAD_PROC (sendto);
5784#undef LOAD_PROC
5785
5786 /* specify version 1.1 of winsock */
5787 if (pfn_WSAStartup (0x101, &winsockData) == 0)
5788 {
5789 if (winsockData.wVersion != 0x101)
5790 goto fail;
5791
5792 if (!load_now)
5793 {
5794 /* Report that winsock exists and is usable, but leave
5795 socket functions disabled. I am assuming that calling
5796 WSAStartup does not require any network interaction,
5797 and in particular does not cause or require a dial-up
5798 connection to be established. */
5799
5800 pfn_WSACleanup ();
5801 FreeLibrary (winsock_lib);
5802 winsock_lib = NULL;
5803 }
5804 winsock_inuse = 0;
5805 return TRUE;
5806 }
5807
5808 fail:
5809 FreeLibrary (winsock_lib);
5810 winsock_lib = NULL;
5811 }
5812
5813 return FALSE;
5814}
5815
5816
5817int h_errno = 0;
5818
5819/* function to set h_errno for compatibility; map winsock error codes to
5820 normal system codes where they overlap (non-overlapping definitions
5821 are already in <sys/socket.h> */
5822static void
5823set_errno (void)
5824{
5825 if (winsock_lib == NULL)
5826 h_errno = EINVAL;
5827 else
5828 h_errno = pfn_WSAGetLastError ();
5829
5830 switch (h_errno)
5831 {
5832 case WSAEACCES: h_errno = EACCES; break;
5833 case WSAEBADF: h_errno = EBADF; break;
5834 case WSAEFAULT: h_errno = EFAULT; break;
5835 case WSAEINTR: h_errno = EINTR; break;
5836 case WSAEINVAL: h_errno = EINVAL; break;
5837 case WSAEMFILE: h_errno = EMFILE; break;
5838 case WSAENAMETOOLONG: h_errno = ENAMETOOLONG; break;
5839 case WSAENOTEMPTY: h_errno = ENOTEMPTY; break;
5840 }
5841 errno = h_errno;
5842}
5843
5844static void
5845check_errno (void)
5846{
5847 if (h_errno == 0 && winsock_lib != NULL)
5848 pfn_WSASetLastError (0);
5849}
5850
5851/* Extend strerror to handle the winsock-specific error codes. */
5852struct {
5853 int errnum;
5854 char * msg;
5855} _wsa_errlist[] = {
5856 {WSAEINTR , "Interrupted function call"},
5857 {WSAEBADF , "Bad file descriptor"},
5858 {WSAEACCES , "Permission denied"},
5859 {WSAEFAULT , "Bad address"},
5860 {WSAEINVAL , "Invalid argument"},
5861 {WSAEMFILE , "Too many open files"},
5862
5863 {WSAEWOULDBLOCK , "Resource temporarily unavailable"},
5864 {WSAEINPROGRESS , "Operation now in progress"},
5865 {WSAEALREADY , "Operation already in progress"},
5866 {WSAENOTSOCK , "Socket operation on non-socket"},
5867 {WSAEDESTADDRREQ , "Destination address required"},
5868 {WSAEMSGSIZE , "Message too long"},
5869 {WSAEPROTOTYPE , "Protocol wrong type for socket"},
5870 {WSAENOPROTOOPT , "Bad protocol option"},
5871 {WSAEPROTONOSUPPORT , "Protocol not supported"},
5872 {WSAESOCKTNOSUPPORT , "Socket type not supported"},
5873 {WSAEOPNOTSUPP , "Operation not supported"},
5874 {WSAEPFNOSUPPORT , "Protocol family not supported"},
5875 {WSAEAFNOSUPPORT , "Address family not supported by protocol family"},
5876 {WSAEADDRINUSE , "Address already in use"},
5877 {WSAEADDRNOTAVAIL , "Cannot assign requested address"},
5878 {WSAENETDOWN , "Network is down"},
5879 {WSAENETUNREACH , "Network is unreachable"},
5880 {WSAENETRESET , "Network dropped connection on reset"},
5881 {WSAECONNABORTED , "Software caused connection abort"},
5882 {WSAECONNRESET , "Connection reset by peer"},
5883 {WSAENOBUFS , "No buffer space available"},
5884 {WSAEISCONN , "Socket is already connected"},
5885 {WSAENOTCONN , "Socket is not connected"},
5886 {WSAESHUTDOWN , "Cannot send after socket shutdown"},
5887 {WSAETOOMANYREFS , "Too many references"}, /* not sure */
5888 {WSAETIMEDOUT , "Connection timed out"},
5889 {WSAECONNREFUSED , "Connection refused"},
5890 {WSAELOOP , "Network loop"}, /* not sure */
5891 {WSAENAMETOOLONG , "Name is too long"},
5892 {WSAEHOSTDOWN , "Host is down"},
5893 {WSAEHOSTUNREACH , "No route to host"},
5894 {WSAENOTEMPTY , "Buffer not empty"}, /* not sure */
5895 {WSAEPROCLIM , "Too many processes"},
5896 {WSAEUSERS , "Too many users"}, /* not sure */
5897 {WSAEDQUOT , "Double quote in host name"}, /* really not sure */
5898 {WSAESTALE , "Data is stale"}, /* not sure */
5899 {WSAEREMOTE , "Remote error"}, /* not sure */
5900
5901 {WSASYSNOTREADY , "Network subsystem is unavailable"},
5902 {WSAVERNOTSUPPORTED , "WINSOCK.DLL version out of range"},
5903 {WSANOTINITIALISED , "Winsock not initialized successfully"},
5904 {WSAEDISCON , "Graceful shutdown in progress"},
5905#ifdef WSAENOMORE
5906 {WSAENOMORE , "No more operations allowed"}, /* not sure */
5907 {WSAECANCELLED , "Operation cancelled"}, /* not sure */
5908 {WSAEINVALIDPROCTABLE , "Invalid procedure table from service provider"},
5909 {WSAEINVALIDPROVIDER , "Invalid service provider version number"},
5910 {WSAEPROVIDERFAILEDINIT , "Unable to initialize a service provider"},
5911 {WSASYSCALLFAILURE , "System call failure"},
5912 {WSASERVICE_NOT_FOUND , "Service not found"}, /* not sure */
5913 {WSATYPE_NOT_FOUND , "Class type not found"},
5914 {WSA_E_NO_MORE , "No more resources available"}, /* really not sure */
5915 {WSA_E_CANCELLED , "Operation already cancelled"}, /* really not sure */
5916 {WSAEREFUSED , "Operation refused"}, /* not sure */
5917#endif
5918
5919 {WSAHOST_NOT_FOUND , "Host not found"},
5920 {WSATRY_AGAIN , "Authoritative host not found during name lookup"},
5921 {WSANO_RECOVERY , "Non-recoverable error during name lookup"},
5922 {WSANO_DATA , "Valid name, no data record of requested type"},
5923
5924 {-1, NULL}
5925};
5926
5927char *
5928sys_strerror (int error_no)
5929{
5930 int i;
5931 static char unknown_msg[40];
5932
5933 if (error_no >= 0 && error_no < sys_nerr)
5934 return sys_errlist[error_no];
5935
5936 for (i = 0; _wsa_errlist[i].errnum >= 0; i++)
5937 if (_wsa_errlist[i].errnum == error_no)
5938 return _wsa_errlist[i].msg;
5939
5940 sprintf (unknown_msg, "Unidentified error: %d", error_no);
5941 return unknown_msg;
5942}
5943
5944/* [andrewi 3-May-96] I've had conflicting results using both methods,
5945 but I believe the method of keeping the socket handle separate (and
5946 insuring it is not inheritable) is the correct one. */
5947
5948#define SOCK_HANDLE(fd) ((SOCKET) fd_info[fd].hnd)
5949
5950static int socket_to_fd (SOCKET s);
5951
5952int
5953sys_socket (int af, int type, int protocol)
5954{
5955 SOCKET s;
5956
5957 if (winsock_lib == NULL)
5958 {
5959 h_errno = ENETDOWN;
5960 return INVALID_SOCKET;
5961 }
5962
5963 check_errno ();
5964
5965 /* call the real socket function */
5966 s = pfn_socket (af, type, protocol);
5967
5968 if (s != INVALID_SOCKET)
5969 return socket_to_fd (s);
5970
5971 set_errno ();
5972 return -1;
5973}
5974
5975/* Convert a SOCKET to a file descriptor. */
5976static int
5977socket_to_fd (SOCKET s)
5978{
5979 int fd;
5980 child_process * cp;
5981
5982 /* Although under NT 3.5 _open_osfhandle will accept a socket
5983 handle, if opened with SO_OPENTYPE == SO_SYNCHRONOUS_NONALERT,
5984 that does not work under NT 3.1. However, we can get the same
5985 effect by using a backdoor function to replace an existing
5986 descriptor handle with the one we want. */
5987
5988 /* allocate a file descriptor (with appropriate flags) */
5989 fd = _open ("NUL:", _O_RDWR);
5990 if (fd >= 0)
5991 {
5992 /* Make a non-inheritable copy of the socket handle. Note
5993 that it is possible that sockets aren't actually kernel
5994 handles, which appears to be the case on Windows 9x when
5995 the MS Proxy winsock client is installed. */
5996 {
5997 /* Apparently there is a bug in NT 3.51 with some service
5998 packs, which prevents using DuplicateHandle to make a
5999 socket handle non-inheritable (causes WSACleanup to
6000 hang). The work-around is to use SetHandleInformation
6001 instead if it is available and implemented. */
6002 if (pfn_SetHandleInformation)
6003 {
6004 pfn_SetHandleInformation ((HANDLE) s, HANDLE_FLAG_INHERIT, 0);
6005 }
6006 else
6007 {
6008 HANDLE parent = GetCurrentProcess ();
6009 HANDLE new_s = INVALID_HANDLE_VALUE;
6010
6011 if (DuplicateHandle (parent,
6012 (HANDLE) s,
6013 parent,
6014 &new_s,
6015 0,
6016 FALSE,
6017 DUPLICATE_SAME_ACCESS))
6018 {
6019 /* It is possible that DuplicateHandle succeeds even
6020 though the socket wasn't really a kernel handle,
6021 because a real handle has the same value. So
6022 test whether the new handle really is a socket. */
6023 long nonblocking = 0;
6024 if (pfn_ioctlsocket ((SOCKET) new_s, FIONBIO, &nonblocking) == 0)
6025 {
6026 pfn_closesocket (s);
6027 s = (SOCKET) new_s;
6028 }
6029 else
6030 {
6031 CloseHandle (new_s);
6032 }
6033 }
6034 }
6035 }
6036 fd_info[fd].hnd = (HANDLE) s;
6037
6038 /* set our own internal flags */
6039 fd_info[fd].flags = FILE_SOCKET | FILE_BINARY | FILE_READ | FILE_WRITE;
6040
6041 cp = new_child ();
6042 if (cp)
6043 {
6044 cp->fd = fd;
6045 cp->status = STATUS_READ_ACKNOWLEDGED;
6046
6047 /* attach child_process to fd_info */
6048 if (fd_info[ fd ].cp != NULL)
6049 {
6050 DebPrint (("sys_socket: fd_info[%d] apparently in use!\n", fd));
6051 emacs_abort ();
6052 }
6053
6054 fd_info[ fd ].cp = cp;
6055
6056 /* success! */
6057 winsock_inuse++; /* count open sockets */
6058 return fd;
6059 }
6060
6061 /* clean up */
6062 _close (fd);
6063 }
6064 pfn_closesocket (s);
6065 h_errno = EMFILE;
6066 return -1;
6067}
6068
6069int
6070sys_bind (int s, const struct sockaddr * addr, int namelen)
6071{
6072 if (winsock_lib == NULL)
6073 {
6074 h_errno = ENOTSOCK;
6075 return SOCKET_ERROR;
6076 }
6077
6078 check_errno ();
6079 if (fd_info[s].flags & FILE_SOCKET)
6080 {
6081 int rc = pfn_bind (SOCK_HANDLE (s), addr, namelen);
6082 if (rc == SOCKET_ERROR)
6083 set_errno ();
6084 return rc;
6085 }
6086 h_errno = ENOTSOCK;
6087 return SOCKET_ERROR;
6088}
6089
6090int
6091sys_connect (int s, const struct sockaddr * name, int namelen)
6092{
6093 if (winsock_lib == NULL)
6094 {
6095 h_errno = ENOTSOCK;
6096 return SOCKET_ERROR;
6097 }
6098
6099 check_errno ();
6100 if (fd_info[s].flags & FILE_SOCKET)
6101 {
6102 int rc = pfn_connect (SOCK_HANDLE (s), name, namelen);
6103 if (rc == SOCKET_ERROR)
6104 set_errno ();
6105 return rc;
6106 }
6107 h_errno = ENOTSOCK;
6108 return SOCKET_ERROR;
6109}
6110
6111u_short
6112sys_htons (u_short hostshort)
6113{
6114 return (winsock_lib != NULL) ?
6115 pfn_htons (hostshort) : hostshort;
6116}
6117
6118u_short
6119sys_ntohs (u_short netshort)
6120{
6121 return (winsock_lib != NULL) ?
6122 pfn_ntohs (netshort) : netshort;
6123}
6124
6125unsigned long
6126sys_inet_addr (const char * cp)
6127{
6128 return (winsock_lib != NULL) ?
6129 pfn_inet_addr (cp) : INADDR_NONE;
6130}
6131
6132int
6133sys_gethostname (char * name, int namelen)
6134{
6135 if (winsock_lib != NULL)
6136 return pfn_gethostname (name, namelen);
6137
6138 if (namelen > MAX_COMPUTERNAME_LENGTH)
6139 return !GetComputerName (name, (DWORD *)&namelen);
6140
6141 h_errno = EFAULT;
6142 return SOCKET_ERROR;
6143}
6144
6145struct hostent *
6146sys_gethostbyname (const char * name)
6147{
6148 struct hostent * host;
6149
6150 if (winsock_lib == NULL)
6151 {
6152 h_errno = ENETDOWN;
6153 return NULL;
6154 }
6155
6156 check_errno ();
6157 host = pfn_gethostbyname (name);
6158 if (!host)
6159 set_errno ();
6160 return host;
6161}
6162
6163struct servent *
6164sys_getservbyname (const char * name, const char * proto)
6165{
6166 struct servent * serv;
6167
6168 if (winsock_lib == NULL)
6169 {
6170 h_errno = ENETDOWN;
6171 return NULL;
6172 }
6173
6174 check_errno ();
6175 serv = pfn_getservbyname (name, proto);
6176 if (!serv)
6177 set_errno ();
6178 return serv;
6179}
6180
6181int
6182sys_getpeername (int s, struct sockaddr *addr, int * namelen)
6183{
6184 if (winsock_lib == NULL)
6185 {
6186 h_errno = ENETDOWN;
6187 return SOCKET_ERROR;
6188 }
6189
6190 check_errno ();
6191 if (fd_info[s].flags & FILE_SOCKET)
6192 {
6193 int rc = pfn_getpeername (SOCK_HANDLE (s), addr, namelen);
6194 if (rc == SOCKET_ERROR)
6195 set_errno ();
6196 return rc;
6197 }
6198 h_errno = ENOTSOCK;
6199 return SOCKET_ERROR;
6200}
6201
6202int
6203sys_shutdown (int s, int how)
6204{
6205 if (winsock_lib == NULL)
6206 {
6207 h_errno = ENETDOWN;
6208 return SOCKET_ERROR;
6209 }
6210
6211 check_errno ();
6212 if (fd_info[s].flags & FILE_SOCKET)
6213 {
6214 int rc = pfn_shutdown (SOCK_HANDLE (s), how);
6215 if (rc == SOCKET_ERROR)
6216 set_errno ();
6217 return rc;
6218 }
6219 h_errno = ENOTSOCK;
6220 return SOCKET_ERROR;
6221}
6222
6223int
6224sys_setsockopt (int s, int level, int optname, const void * optval, int optlen)
6225{
6226 if (winsock_lib == NULL)
6227 {
6228 h_errno = ENETDOWN;
6229 return SOCKET_ERROR;
6230 }
6231
6232 check_errno ();
6233 if (fd_info[s].flags & FILE_SOCKET)
6234 {
6235 int rc = pfn_setsockopt (SOCK_HANDLE (s), level, optname,
6236 (const char *)optval, optlen);
6237 if (rc == SOCKET_ERROR)
6238 set_errno ();
6239 return rc;
6240 }
6241 h_errno = ENOTSOCK;
6242 return SOCKET_ERROR;
6243}
6244
6245int
6246sys_listen (int s, int backlog)
6247{
6248 if (winsock_lib == NULL)
6249 {
6250 h_errno = ENETDOWN;
6251 return SOCKET_ERROR;
6252 }
6253
6254 check_errno ();
6255 if (fd_info[s].flags & FILE_SOCKET)
6256 {
6257 int rc = pfn_listen (SOCK_HANDLE (s), backlog);
6258 if (rc == SOCKET_ERROR)
6259 set_errno ();
6260 else
6261 fd_info[s].flags |= FILE_LISTEN;
6262 return rc;
6263 }
6264 h_errno = ENOTSOCK;
6265 return SOCKET_ERROR;
6266}
6267
6268int
6269sys_getsockname (int s, struct sockaddr * name, int * namelen)
6270{
6271 if (winsock_lib == NULL)
6272 {
6273 h_errno = ENETDOWN;
6274 return SOCKET_ERROR;
6275 }
6276
6277 check_errno ();
6278 if (fd_info[s].flags & FILE_SOCKET)
6279 {
6280 int rc = pfn_getsockname (SOCK_HANDLE (s), name, namelen);
6281 if (rc == SOCKET_ERROR)
6282 set_errno ();
6283 return rc;
6284 }
6285 h_errno = ENOTSOCK;
6286 return SOCKET_ERROR;
6287}
6288
6289int
6290sys_accept (int s, struct sockaddr * addr, int * addrlen)
6291{
6292 if (winsock_lib == NULL)
6293 {
6294 h_errno = ENETDOWN;
6295 return -1;
6296 }
6297
6298 check_errno ();
6299 if (fd_info[s].flags & FILE_LISTEN)
6300 {
6301 SOCKET t = pfn_accept (SOCK_HANDLE (s), addr, addrlen);
6302 int fd = -1;
6303 if (t == INVALID_SOCKET)
6304 set_errno ();
6305 else
6306 fd = socket_to_fd (t);
6307
6308 fd_info[s].cp->status = STATUS_READ_ACKNOWLEDGED;
6309 ResetEvent (fd_info[s].cp->char_avail);
6310 return fd;
6311 }
6312 h_errno = ENOTSOCK;
6313 return -1;
6314}
6315
6316int
6317sys_recvfrom (int s, char * buf, int len, int flags,
6318 struct sockaddr * from, int * fromlen)
6319{
6320 if (winsock_lib == NULL)
6321 {
6322 h_errno = ENETDOWN;
6323 return SOCKET_ERROR;
6324 }
6325
6326 check_errno ();
6327 if (fd_info[s].flags & FILE_SOCKET)
6328 {
6329 int rc = pfn_recvfrom (SOCK_HANDLE (s), buf, len, flags, from, fromlen);
6330 if (rc == SOCKET_ERROR)
6331 set_errno ();
6332 return rc;
6333 }
6334 h_errno = ENOTSOCK;
6335 return SOCKET_ERROR;
6336}
6337
6338int
6339sys_sendto (int s, const char * buf, int len, int flags,
6340 const struct sockaddr * to, int tolen)
6341{
6342 if (winsock_lib == NULL)
6343 {
6344 h_errno = ENETDOWN;
6345 return SOCKET_ERROR;
6346 }
6347
6348 check_errno ();
6349 if (fd_info[s].flags & FILE_SOCKET)
6350 {
6351 int rc = pfn_sendto (SOCK_HANDLE (s), buf, len, flags, to, tolen);
6352 if (rc == SOCKET_ERROR)
6353 set_errno ();
6354 return rc;
6355 }
6356 h_errno = ENOTSOCK;
6357 return SOCKET_ERROR;
6358}
6359
6360/* Windows does not have an fcntl function. Provide an implementation
6361 solely for making sockets non-blocking. */
6362int
6363fcntl (int s, int cmd, int options)
6364{
6365 if (winsock_lib == NULL)
6366 {
6367 h_errno = ENETDOWN;
6368 return -1;
6369 }
6370
6371 check_errno ();
6372 if (fd_info[s].flags & FILE_SOCKET)
6373 {
6374 if (cmd == F_SETFL && options == O_NONBLOCK)
6375 {
6376 unsigned long nblock = 1;
6377 int rc = pfn_ioctlsocket (SOCK_HANDLE (s), FIONBIO, &nblock);
6378 if (rc == SOCKET_ERROR)
6379 set_errno ();
6380 /* Keep track of the fact that we set this to non-blocking. */
6381 fd_info[s].flags |= FILE_NDELAY;
6382 return rc;
6383 }
6384 else
6385 {
6386 h_errno = EINVAL;
6387 return SOCKET_ERROR;
6388 }
6389 }
6390 h_errno = ENOTSOCK;
6391 return SOCKET_ERROR;
6392}
6393
6394
6395/* Shadow main io functions: we need to handle pipes and sockets more
6396 intelligently, and implement non-blocking mode as well. */
6397
6398int
6399sys_close (int fd)
6400{
6401 int rc;
6402
6403 if (fd < 0)
6404 {
6405 errno = EBADF;
6406 return -1;
6407 }
6408
6409 if (fd < MAXDESC && fd_info[fd].cp)
6410 {
6411 child_process * cp = fd_info[fd].cp;
6412
6413 fd_info[fd].cp = NULL;
6414
6415 if (CHILD_ACTIVE (cp))
6416 {
6417 /* if last descriptor to active child_process then cleanup */
6418 int i;
6419 for (i = 0; i < MAXDESC; i++)
6420 {
6421 if (i == fd)
6422 continue;
6423 if (fd_info[i].cp == cp)
6424 break;
6425 }
6426 if (i == MAXDESC)
6427 {
6428 if (fd_info[fd].flags & FILE_SOCKET)
6429 {
6430 if (winsock_lib == NULL) emacs_abort ();
6431
6432 pfn_shutdown (SOCK_HANDLE (fd), 2);
6433 rc = pfn_closesocket (SOCK_HANDLE (fd));
6434
6435 winsock_inuse--; /* count open sockets */
6436 }
6437 /* If the process handle is NULL, it's either a socket
6438 or serial connection, or a subprocess that was
6439 already reaped by reap_subprocess, but whose
6440 resources were not yet freed, because its output was
6441 not fully read yet by the time it was reaped. (This
6442 usually happens with async subprocesses whose output
6443 is being read by Emacs.) Otherwise, this process was
6444 not reaped yet, so we set its FD to a negative value
6445 to make sure sys_select will eventually get to
6446 calling the SIGCHLD handler for it, which will then
6447 invoke waitpid and reap_subprocess. */
6448 if (cp->procinfo.hProcess == NULL)
6449 delete_child (cp);
6450 else
6451 cp->fd = -1;
6452 }
6453 }
6454 }
6455
6456 /* Note that sockets do not need special treatment here (at least on
6457 NT and Windows 95 using the standard tcp/ip stacks) - it appears that
6458 closesocket is equivalent to CloseHandle, which is to be expected
6459 because socket handles are fully fledged kernel handles. */
6460 rc = _close (fd);
6461
6462 if (rc == 0 && fd < MAXDESC)
6463 fd_info[fd].flags = 0;
6464
6465 return rc;
6466}
6467
6468int
6469sys_dup (int fd)
6470{
6471 int new_fd;
6472
6473 new_fd = _dup (fd);
6474 if (new_fd >= 0 && new_fd < MAXDESC)
6475 {
6476 /* duplicate our internal info as well */
6477 fd_info[new_fd] = fd_info[fd];
6478 }
6479 return new_fd;
6480}
6481
6482int
6483sys_dup2 (int src, int dst)
6484{
6485 int rc;
6486
6487 if (dst < 0 || dst >= MAXDESC)
6488 {
6489 errno = EBADF;
6490 return -1;
6491 }
6492
6493 /* make sure we close the destination first if it's a pipe or socket */
6494 if (src != dst && fd_info[dst].flags != 0)
6495 sys_close (dst);
6496
6497 rc = _dup2 (src, dst);
6498 if (rc == 0)
6499 {
6500 /* duplicate our internal info as well */
6501 fd_info[dst] = fd_info[src];
6502 }
6503 return rc;
6504}
6505
6506/* Unix pipe() has only one arg */
6507int
6508sys_pipe (int * phandles)
6509{
6510 int rc;
6511 unsigned flags;
6512
6513 /* make pipe handles non-inheritable; when we spawn a child, we
6514 replace the relevant handle with an inheritable one. Also put
6515 pipes into binary mode; we will do text mode translation ourselves
6516 if required. */
6517 rc = _pipe (phandles, 0, _O_NOINHERIT | _O_BINARY);
6518
6519 if (rc == 0)
6520 {
6521 /* Protect against overflow, since Windows can open more handles than
6522 our fd_info array has room for. */
6523 if (phandles[0] >= MAXDESC || phandles[1] >= MAXDESC)
6524 {
6525 _close (phandles[0]);
6526 _close (phandles[1]);
6527 rc = -1;
6528 }
6529 else
6530 {
6531 flags = FILE_PIPE | FILE_READ | FILE_BINARY;
6532 fd_info[phandles[0]].flags = flags;
6533
6534 flags = FILE_PIPE | FILE_WRITE | FILE_BINARY;
6535 fd_info[phandles[1]].flags = flags;
6536 }
6537 }
6538
6539 return rc;
6540}
6541
6542/* Function to do blocking read of one byte, needed to implement
6543 select. It is only allowed on communication ports, sockets, or
6544 pipes. */
6545int
6546_sys_read_ahead (int fd)
6547{
6548 child_process * cp;
6549 int rc;
6550
6551 if (fd < 0 || fd >= MAXDESC)
6552 return STATUS_READ_ERROR;
6553
6554 cp = fd_info[fd].cp;
6555
6556 if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY)
6557 return STATUS_READ_ERROR;
6558
6559 if ((fd_info[fd].flags & (FILE_PIPE | FILE_SERIAL | FILE_SOCKET)) == 0
6560 || (fd_info[fd].flags & FILE_READ) == 0)
6561 {
6562 DebPrint (("_sys_read_ahead: internal error: fd %d is not a pipe, serial port, or socket!\n", fd));
6563 emacs_abort ();
6564 }
6565
6566 cp->status = STATUS_READ_IN_PROGRESS;
6567
6568 if (fd_info[fd].flags & FILE_PIPE)
6569 {
6570 rc = _read (fd, &cp->chr, sizeof (char));
6571
6572 /* Give subprocess time to buffer some more output for us before
6573 reporting that input is available; we need this because Windows 95
6574 connects DOS programs to pipes by making the pipe appear to be
6575 the normal console stdout - as a result most DOS programs will
6576 write to stdout without buffering, ie. one character at a
6577 time. Even some W32 programs do this - "dir" in a command
6578 shell on NT is very slow if we don't do this. */
6579 if (rc > 0)
6580 {
6581 int wait = w32_pipe_read_delay;
6582
6583 if (wait > 0)
6584 Sleep (wait);
6585 else if (wait < 0)
6586 while (++wait <= 0)
6587 /* Yield remainder of our time slice, effectively giving a
6588 temporary priority boost to the child process. */
6589 Sleep (0);
6590 }
6591 }
6592 else if (fd_info[fd].flags & FILE_SERIAL)
6593 {
6594 HANDLE hnd = fd_info[fd].hnd;
6595 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_read;
6596 COMMTIMEOUTS ct;
6597
6598 /* Configure timeouts for blocking read. */
6599 if (!GetCommTimeouts (hnd, &ct))
6600 return STATUS_READ_ERROR;
6601 ct.ReadIntervalTimeout = 0;
6602 ct.ReadTotalTimeoutMultiplier = 0;
6603 ct.ReadTotalTimeoutConstant = 0;
6604 if (!SetCommTimeouts (hnd, &ct))
6605 return STATUS_READ_ERROR;
6606
6607 if (!ReadFile (hnd, &cp->chr, sizeof (char), (DWORD*) &rc, ovl))
6608 {
6609 if (GetLastError () != ERROR_IO_PENDING)
6610 return STATUS_READ_ERROR;
6611 if (!GetOverlappedResult (hnd, ovl, (DWORD*) &rc, TRUE))
6612 return STATUS_READ_ERROR;
6613 }
6614 }
6615 else if (fd_info[fd].flags & FILE_SOCKET)
6616 {
6617 unsigned long nblock = 0;
6618 /* We always want this to block, so temporarily disable NDELAY. */
6619 if (fd_info[fd].flags & FILE_NDELAY)
6620 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
6621
6622 rc = pfn_recv (SOCK_HANDLE (fd), &cp->chr, sizeof (char), 0);
6623
6624 if (fd_info[fd].flags & FILE_NDELAY)
6625 {
6626 nblock = 1;
6627 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
6628 }
6629 }
6630
6631 if (rc == sizeof (char))
6632 cp->status = STATUS_READ_SUCCEEDED;
6633 else
6634 cp->status = STATUS_READ_FAILED;
6635
6636 return cp->status;
6637}
6638
6639int
6640_sys_wait_accept (int fd)
6641{
6642 HANDLE hEv;
6643 child_process * cp;
6644 int rc;
6645
6646 if (fd < 0 || fd >= MAXDESC)
6647 return STATUS_READ_ERROR;
6648
6649 cp = fd_info[fd].cp;
6650
6651 if (cp == NULL || cp->fd != fd || cp->status != STATUS_READ_READY)
6652 return STATUS_READ_ERROR;
6653
6654 cp->status = STATUS_READ_FAILED;
6655
6656 hEv = pfn_WSACreateEvent ();
6657 rc = pfn_WSAEventSelect (SOCK_HANDLE (fd), hEv, FD_ACCEPT);
6658 if (rc != SOCKET_ERROR)
6659 {
6660 rc = WaitForSingleObject (hEv, INFINITE);
6661 pfn_WSAEventSelect (SOCK_HANDLE (fd), NULL, 0);
6662 if (rc == WAIT_OBJECT_0)
6663 cp->status = STATUS_READ_SUCCEEDED;
6664 }
6665 pfn_WSACloseEvent (hEv);
6666
6667 return cp->status;
6668}
6669
6670int
6671sys_read (int fd, char * buffer, unsigned int count)
6672{
6673 int nchars;
6674 int to_read;
6675 DWORD waiting;
6676 char * orig_buffer = buffer;
6677
6678 if (fd < 0)
6679 {
6680 errno = EBADF;
6681 return -1;
6682 }
6683
6684 if (fd < MAXDESC && fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET | FILE_SERIAL))
6685 {
6686 child_process *cp = fd_info[fd].cp;
6687
6688 if ((fd_info[fd].flags & FILE_READ) == 0)
6689 {
6690 errno = EBADF;
6691 return -1;
6692 }
6693
6694 nchars = 0;
6695
6696 /* re-read CR carried over from last read */
6697 if (fd_info[fd].flags & FILE_LAST_CR)
6698 {
6699 if (fd_info[fd].flags & FILE_BINARY) emacs_abort ();
6700 *buffer++ = 0x0d;
6701 count--;
6702 nchars++;
6703 fd_info[fd].flags &= ~FILE_LAST_CR;
6704 }
6705
6706 /* presence of a child_process structure means we are operating in
6707 non-blocking mode - otherwise we just call _read directly.
6708 Note that the child_process structure might be missing because
6709 reap_subprocess has been called; in this case the pipe is
6710 already broken, so calling _read on it is okay. */
6711 if (cp)
6712 {
6713 int current_status = cp->status;
6714
6715 switch (current_status)
6716 {
6717 case STATUS_READ_FAILED:
6718 case STATUS_READ_ERROR:
6719 /* report normal EOF if nothing in buffer */
6720 if (nchars <= 0)
6721 fd_info[fd].flags |= FILE_AT_EOF;
6722 return nchars;
6723
6724 case STATUS_READ_READY:
6725 case STATUS_READ_IN_PROGRESS:
6726 DebPrint (("sys_read called when read is in progress\n"));
6727 errno = EWOULDBLOCK;
6728 return -1;
6729
6730 case STATUS_READ_SUCCEEDED:
6731 /* consume read-ahead char */
6732 *buffer++ = cp->chr;
6733 count--;
6734 nchars++;
6735 cp->status = STATUS_READ_ACKNOWLEDGED;
6736 ResetEvent (cp->char_avail);
6737
6738 case STATUS_READ_ACKNOWLEDGED:
6739 break;
6740
6741 default:
6742 DebPrint (("sys_read: bad status %d\n", current_status));
6743 errno = EBADF;
6744 return -1;
6745 }
6746
6747 if (fd_info[fd].flags & FILE_PIPE)
6748 {
6749 PeekNamedPipe ((HANDLE) _get_osfhandle (fd), NULL, 0, NULL, &waiting, NULL);
6750 to_read = min (waiting, (DWORD) count);
6751
6752 if (to_read > 0)
6753 nchars += _read (fd, buffer, to_read);
6754 }
6755 else if (fd_info[fd].flags & FILE_SERIAL)
6756 {
6757 HANDLE hnd = fd_info[fd].hnd;
6758 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_read;
6759 int rc = 0;
6760 COMMTIMEOUTS ct;
6761
6762 if (count > 0)
6763 {
6764 /* Configure timeouts for non-blocking read. */
6765 if (!GetCommTimeouts (hnd, &ct))
6766 {
6767 errno = EIO;
6768 return -1;
6769 }
6770 ct.ReadIntervalTimeout = MAXDWORD;
6771 ct.ReadTotalTimeoutMultiplier = 0;
6772 ct.ReadTotalTimeoutConstant = 0;
6773 if (!SetCommTimeouts (hnd, &ct))
6774 {
6775 errno = EIO;
6776 return -1;
6777 }
6778
6779 if (!ResetEvent (ovl->hEvent))
6780 {
6781 errno = EIO;
6782 return -1;
6783 }
6784 if (!ReadFile (hnd, buffer, count, (DWORD*) &rc, ovl))
6785 {
6786 if (GetLastError () != ERROR_IO_PENDING)
6787 {
6788 errno = EIO;
6789 return -1;
6790 }
6791 if (!GetOverlappedResult (hnd, ovl, (DWORD*) &rc, TRUE))
6792 {
6793 errno = EIO;
6794 return -1;
6795 }
6796 }
6797 nchars += rc;
6798 }
6799 }
6800 else /* FILE_SOCKET */
6801 {
6802 if (winsock_lib == NULL) emacs_abort ();
6803
6804 /* do the equivalent of a non-blocking read */
6805 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONREAD, &waiting);
6806 if (waiting == 0 && nchars == 0)
6807 {
6808 h_errno = errno = EWOULDBLOCK;
6809 return -1;
6810 }
6811
6812 if (waiting)
6813 {
6814 /* always use binary mode for sockets */
6815 int res = pfn_recv (SOCK_HANDLE (fd), buffer, count, 0);
6816 if (res == SOCKET_ERROR)
6817 {
6818 DebPrint (("sys_read.recv failed with error %d on socket %ld\n",
6819 pfn_WSAGetLastError (), SOCK_HANDLE (fd)));
6820 set_errno ();
6821 return -1;
6822 }
6823 nchars += res;
6824 }
6825 }
6826 }
6827 else
6828 {
6829 int nread = _read (fd, buffer, count);
6830 if (nread >= 0)
6831 nchars += nread;
6832 else if (nchars == 0)
6833 nchars = nread;
6834 }
6835
6836 if (nchars <= 0)
6837 fd_info[fd].flags |= FILE_AT_EOF;
6838 /* Perform text mode translation if required. */
6839 else if ((fd_info[fd].flags & FILE_BINARY) == 0)
6840 {
6841 nchars = crlf_to_lf (nchars, orig_buffer);
6842 /* If buffer contains only CR, return that. To be absolutely
6843 sure we should attempt to read the next char, but in
6844 practice a CR to be followed by LF would not appear by
6845 itself in the buffer. */
6846 if (nchars > 1 && orig_buffer[nchars - 1] == 0x0d)
6847 {
6848 fd_info[fd].flags |= FILE_LAST_CR;
6849 nchars--;
6850 }
6851 }
6852 }
6853 else
6854 nchars = _read (fd, buffer, count);
6855
6856 return nchars;
6857}
6858
6859/* From w32xfns.c */
6860extern HANDLE interrupt_handle;
6861
6862/* For now, don't bother with a non-blocking mode */
6863int
6864sys_write (int fd, const void * buffer, unsigned int count)
6865{
6866 int nchars;
6867
6868 if (fd < 0)
6869 {
6870 errno = EBADF;
6871 return -1;
6872 }
6873
6874 if (fd < MAXDESC && fd_info[fd].flags & (FILE_PIPE | FILE_SOCKET | FILE_SERIAL))
6875 {
6876 if ((fd_info[fd].flags & FILE_WRITE) == 0)
6877 {
6878 errno = EBADF;
6879 return -1;
6880 }
6881
6882 /* Perform text mode translation if required. */
6883 if ((fd_info[fd].flags & FILE_BINARY) == 0)
6884 {
6885 char * tmpbuf = alloca (count * 2);
6886 unsigned char * src = (void *)buffer;
6887 unsigned char * dst = tmpbuf;
6888 int nbytes = count;
6889
6890 while (1)
6891 {
6892 unsigned char *next;
6893 /* copy next line or remaining bytes */
6894 next = _memccpy (dst, src, '\n', nbytes);
6895 if (next)
6896 {
6897 /* copied one line ending with '\n' */
6898 int copied = next - dst;
6899 nbytes -= copied;
6900 src += copied;
6901 /* insert '\r' before '\n' */
6902 next[-1] = '\r';
6903 next[0] = '\n';
6904 dst = next + 1;
6905 count++;
6906 }
6907 else
6908 /* copied remaining partial line -> now finished */
6909 break;
6910 }
6911 buffer = tmpbuf;
6912 }
6913 }
6914
6915 if (fd < MAXDESC && fd_info[fd].flags & FILE_SERIAL)
6916 {
6917 HANDLE hnd = (HANDLE) _get_osfhandle (fd);
6918 OVERLAPPED *ovl = &fd_info[fd].cp->ovl_write;
6919 HANDLE wait_hnd[2] = { interrupt_handle, ovl->hEvent };
6920 DWORD active = 0;
6921
6922 if (!WriteFile (hnd, buffer, count, (DWORD*) &nchars, ovl))
6923 {
6924 if (GetLastError () != ERROR_IO_PENDING)
6925 {
6926 errno = EIO;
6927 return -1;
6928 }
6929 if (detect_input_pending ())
6930 active = MsgWaitForMultipleObjects (2, wait_hnd, FALSE, INFINITE,
6931 QS_ALLINPUT);
6932 else
6933 active = WaitForMultipleObjects (2, wait_hnd, FALSE, INFINITE);
6934 if (active == WAIT_OBJECT_0)
6935 { /* User pressed C-g, cancel write, then leave. Don't bother
6936 cleaning up as we may only get stuck in buggy drivers. */
6937 PurgeComm (hnd, PURGE_TXABORT | PURGE_TXCLEAR);
6938 CancelIo (hnd);
6939 errno = EIO;
6940 return -1;
6941 }
6942 if (active == WAIT_OBJECT_0 + 1
6943 && !GetOverlappedResult (hnd, ovl, (DWORD*) &nchars, TRUE))
6944 {
6945 errno = EIO;
6946 return -1;
6947 }
6948 }
6949 }
6950 else if (fd < MAXDESC && fd_info[fd].flags & FILE_SOCKET)
6951 {
6952 unsigned long nblock = 0;
6953 if (winsock_lib == NULL) emacs_abort ();
6954
6955 /* TODO: implement select() properly so non-blocking I/O works. */
6956 /* For now, make sure the write blocks. */
6957 if (fd_info[fd].flags & FILE_NDELAY)
6958 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
6959
6960 nchars = pfn_send (SOCK_HANDLE (fd), buffer, count, 0);
6961
6962 /* Set the socket back to non-blocking if it was before,
6963 for other operations that support it. */
6964 if (fd_info[fd].flags & FILE_NDELAY)
6965 {
6966 nblock = 1;
6967 pfn_ioctlsocket (SOCK_HANDLE (fd), FIONBIO, &nblock);
6968 }
6969
6970 if (nchars == SOCKET_ERROR)
6971 {
6972 DebPrint (("sys_write.send failed with error %d on socket %ld\n",
6973 pfn_WSAGetLastError (), SOCK_HANDLE (fd)));
6974 set_errno ();
6975 }
6976 }
6977 else
6978 {
6979 /* Some networked filesystems don't like too large writes, so
6980 break them into smaller chunks. See the Comments section of
6981 the MSDN documentation of WriteFile for details behind the
6982 choice of the value of CHUNK below. See also the thread
6983 http://thread.gmane.org/gmane.comp.version-control.git/145294
6984 in the git mailing list. */
6985 const unsigned char *p = buffer;
6986 const unsigned chunk = 30 * 1024 * 1024;
6987
6988 nchars = 0;
6989 while (count > 0)
6990 {
6991 unsigned this_chunk = count < chunk ? count : chunk;
6992 int n = _write (fd, p, this_chunk);
6993
6994 nchars += n;
6995 if (n < 0)
6996 {
6997 nchars = n;
6998 break;
6999 }
7000 else if (n < this_chunk)
7001 break;
7002 count -= n;
7003 p += n;
7004 }
7005 }
7006
7007 return nchars;
7008}
7009
7010/* The Windows CRT functions are "optimized for speed", so they don't
7011 check for timezone and DST changes if they were last called less
7012 than 1 minute ago (see http://support.microsoft.com/kb/821231). So
7013 all Emacs features that repeatedly call time functions (e.g.,
7014 display-time) are in real danger of missing timezone and DST
7015 changes. Calling tzset before each localtime call fixes that. */
7016struct tm *
7017sys_localtime (const time_t *t)
7018{
7019 tzset ();
7020 return localtime (t);
7021}
7022
7023
7024\f
7025/* Try loading LIBRARY_ID from the file(s) specified in
7026 Vdynamic_library_alist. If the library is loaded successfully,
7027 return the handle of the DLL, and record the filename in the
7028 property :loaded-from of LIBRARY_ID. If the library could not be
7029 found, or when it was already loaded (because the handle is not
7030 recorded anywhere, and so is lost after use), return NULL.
7031
7032 We could also save the handle in :loaded-from, but currently
7033 there's no use case for it. */
7034HMODULE
7035w32_delayed_load (Lisp_Object library_id)
7036{
7037 HMODULE library_dll = NULL;
7038
7039 CHECK_SYMBOL (library_id);
7040
7041 if (CONSP (Vdynamic_library_alist)
7042 && NILP (Fassq (library_id, Vlibrary_cache)))
7043 {
7044 Lisp_Object found = Qnil;
7045 Lisp_Object dlls = Fassq (library_id, Vdynamic_library_alist);
7046
7047 if (CONSP (dlls))
7048 for (dlls = XCDR (dlls); CONSP (dlls); dlls = XCDR (dlls))
7049 {
7050 CHECK_STRING_CAR (dlls);
7051 if ((library_dll = LoadLibrary (SDATA (XCAR (dlls)))))
7052 {
7053 char name[MAX_PATH];
7054 DWORD len;
7055
7056 len = GetModuleFileNameA (library_dll, name, sizeof (name));
7057 found = Fcons (XCAR (dlls),
7058 (len > 0)
7059 /* Possibly truncated */
7060 ? make_specified_string (name, -1, len, 1)
7061 : Qnil);
7062 break;
7063 }
7064 }
7065
7066 Fput (library_id, QCloaded_from, found);
7067 }
7068
7069 return library_dll;
7070}
7071
7072\f
7073void
7074check_windows_init_file (void)
7075{
7076 /* A common indication that Emacs is not installed properly is when
7077 it cannot find the Windows installation file. If this file does
7078 not exist in the expected place, tell the user. */
7079
7080 if (!noninteractive && !inhibit_window_system
7081 /* Vload_path is not yet initialized when we are loading
7082 loadup.el. */
7083 && NILP (Vpurify_flag))
7084 {
7085 Lisp_Object init_file;
7086 int fd;
7087
7088 init_file = build_string ("term/w32-win");
7089 fd = openp (Vload_path, init_file, Fget_load_suffixes (), NULL, Qnil);
7090 if (fd < 0)
7091 {
7092 Lisp_Object load_path_print = Fprin1_to_string (Vload_path, Qnil);
7093 char *init_file_name = SDATA (init_file);
7094 char *load_path = SDATA (load_path_print);
7095 char *buffer = alloca (1024
7096 + strlen (init_file_name)
7097 + strlen (load_path));
7098
7099 sprintf (buffer,
7100 "The Emacs Windows initialization file \"%s.el\" "
7101 "could not be found in your Emacs installation. "
7102 "Emacs checked the following directories for this file:\n"
7103 "\n%s\n\n"
7104 "When Emacs cannot find this file, it usually means that it "
7105 "was not installed properly, or its distribution file was "
7106 "not unpacked properly.\nSee the README.W32 file in the "
7107 "top-level Emacs directory for more information.",
7108 init_file_name, load_path);
7109 MessageBox (NULL,
7110 buffer,
7111 "Emacs Abort Dialog",
7112 MB_OK | MB_ICONEXCLAMATION | MB_TASKMODAL);
7113 /* Use the low-level system abort. */
7114 abort ();
7115 }
7116 else
7117 {
7118 _close (fd);
7119 }
7120 }
7121}
7122
7123void
7124term_ntproc (int ignored)
7125{
7126 (void)ignored;
7127
7128 term_timers ();
7129
7130 /* shutdown the socket interface if necessary */
7131 term_winsock ();
7132
7133 term_w32select ();
7134}
7135
7136void
7137init_ntproc (int dumping)
7138{
7139 sigset_t initial_mask = 0;
7140
7141 /* Initialize the socket interface now if available and requested by
7142 the user by defining PRELOAD_WINSOCK; otherwise loading will be
7143 delayed until open-network-stream is called (w32-has-winsock can
7144 also be used to dynamically load or reload winsock).
7145
7146 Conveniently, init_environment is called before us, so
7147 PRELOAD_WINSOCK can be set in the registry. */
7148
7149 /* Always initialize this correctly. */
7150 winsock_lib = NULL;
7151
7152 if (getenv ("PRELOAD_WINSOCK") != NULL)
7153 init_winsock (TRUE);
7154
7155 /* Initial preparation for subprocess support: replace our standard
7156 handles with non-inheritable versions. */
7157 {
7158 HANDLE parent;
7159 HANDLE stdin_save = INVALID_HANDLE_VALUE;
7160 HANDLE stdout_save = INVALID_HANDLE_VALUE;
7161 HANDLE stderr_save = INVALID_HANDLE_VALUE;
7162
7163 parent = GetCurrentProcess ();
7164
7165 /* ignore errors when duplicating and closing; typically the
7166 handles will be invalid when running as a gui program. */
7167 DuplicateHandle (parent,
7168 GetStdHandle (STD_INPUT_HANDLE),
7169 parent,
7170 &stdin_save,
7171 0,
7172 FALSE,
7173 DUPLICATE_SAME_ACCESS);
7174
7175 DuplicateHandle (parent,
7176 GetStdHandle (STD_OUTPUT_HANDLE),
7177 parent,
7178 &stdout_save,
7179 0,
7180 FALSE,
7181 DUPLICATE_SAME_ACCESS);
7182
7183 DuplicateHandle (parent,
7184 GetStdHandle (STD_ERROR_HANDLE),
7185 parent,
7186 &stderr_save,
7187 0,
7188 FALSE,
7189 DUPLICATE_SAME_ACCESS);
7190
7191 fclose (stdin);
7192 fclose (stdout);
7193 fclose (stderr);
7194
7195 if (stdin_save != INVALID_HANDLE_VALUE)
7196 _open_osfhandle ((intptr_t) stdin_save, O_TEXT);
7197 else
7198 _open ("nul", O_TEXT | O_NOINHERIT | O_RDONLY);
7199 _fdopen (0, "r");
7200
7201 if (stdout_save != INVALID_HANDLE_VALUE)
7202 _open_osfhandle ((intptr_t) stdout_save, O_TEXT);
7203 else
7204 _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY);
7205 _fdopen (1, "w");
7206
7207 if (stderr_save != INVALID_HANDLE_VALUE)
7208 _open_osfhandle ((intptr_t) stderr_save, O_TEXT);
7209 else
7210 _open ("nul", O_TEXT | O_NOINHERIT | O_WRONLY);
7211 _fdopen (2, "w");
7212 }
7213
7214 /* unfortunately, atexit depends on implementation of malloc */
7215 /* atexit (term_ntproc); */
7216 if (!dumping)
7217 {
7218 /* Make sure we start with all signals unblocked. */
7219 sigprocmask (SIG_SETMASK, &initial_mask, NULL);
7220 signal (SIGABRT, term_ntproc);
7221 }
7222 init_timers ();
7223
7224 /* determine which drives are fixed, for GetCachedVolumeInformation */
7225 {
7226 /* GetDriveType must have trailing backslash. */
7227 char drive[] = "A:\\";
7228
7229 /* Loop over all possible drive letters */
7230 while (*drive <= 'Z')
7231 {
7232 /* Record if this drive letter refers to a fixed drive. */
7233 fixed_drives[DRIVE_INDEX (*drive)] =
7234 (GetDriveType (drive) == DRIVE_FIXED);
7235
7236 (*drive)++;
7237 }
7238
7239 /* Reset the volume info cache. */
7240 volume_cache = NULL;
7241 }
7242}
7243
7244/*
7245 shutdown_handler ensures that buffers' autosave files are
7246 up to date when the user logs off, or the system shuts down.
7247*/
7248static BOOL WINAPI
7249shutdown_handler (DWORD type)
7250{
7251 /* Ctrl-C and Ctrl-Break are already suppressed, so don't handle them. */
7252 if (type == CTRL_CLOSE_EVENT /* User closes console window. */
7253 || type == CTRL_LOGOFF_EVENT /* User logs off. */
7254 || type == CTRL_SHUTDOWN_EVENT) /* User shutsdown. */
7255 {
7256 /* Shut down cleanly, making sure autosave files are up to date. */
7257 shut_down_emacs (0, Qnil);
7258 }
7259
7260 /* Allow other handlers to handle this signal. */
7261 return FALSE;
7262}
7263
7264/*
7265 globals_of_w32 is used to initialize those global variables that
7266 must always be initialized on startup even when the global variable
7267 initialized is non zero (see the function main in emacs.c).
7268*/
7269void
7270globals_of_w32 (void)
7271{
7272 HMODULE kernel32 = GetModuleHandle ("kernel32.dll");
7273
7274 get_process_times_fn = (GetProcessTimes_Proc)
7275 GetProcAddress (kernel32, "GetProcessTimes");
7276
7277 DEFSYM (QCloaded_from, ":loaded-from");
7278
7279 g_b_init_is_windows_9x = 0;
7280 g_b_init_open_process_token = 0;
7281 g_b_init_get_token_information = 0;
7282 g_b_init_lookup_account_sid = 0;
7283 g_b_init_get_sid_sub_authority = 0;
7284 g_b_init_get_sid_sub_authority_count = 0;
7285 g_b_init_get_security_info = 0;
7286 g_b_init_get_file_security = 0;
7287 g_b_init_get_security_descriptor_owner = 0;
7288 g_b_init_get_security_descriptor_group = 0;
7289 g_b_init_is_valid_sid = 0;
7290 g_b_init_create_toolhelp32_snapshot = 0;
7291 g_b_init_process32_first = 0;
7292 g_b_init_process32_next = 0;
7293 g_b_init_open_thread_token = 0;
7294 g_b_init_impersonate_self = 0;
7295 g_b_init_revert_to_self = 0;
7296 g_b_init_get_process_memory_info = 0;
7297 g_b_init_get_process_working_set_size = 0;
7298 g_b_init_global_memory_status = 0;
7299 g_b_init_global_memory_status_ex = 0;
7300 g_b_init_equal_sid = 0;
7301 g_b_init_copy_sid = 0;
7302 g_b_init_get_length_sid = 0;
7303 g_b_init_get_native_system_info = 0;
7304 g_b_init_get_system_times = 0;
7305 g_b_init_create_symbolic_link = 0;
7306 g_b_init_get_security_descriptor_dacl = 0;
7307 g_b_init_convert_sd_to_sddl = 0;
7308 g_b_init_convert_sddl_to_sd = 0;
7309 g_b_init_is_valid_security_descriptor = 0;
7310 g_b_init_set_file_security = 0;
7311 num_of_processors = 0;
7312 /* The following sets a handler for shutdown notifications for
7313 console apps. This actually applies to Emacs in both console and
7314 GUI modes, since we had to fool windows into thinking emacs is a
7315 console application to get console mode to work. */
7316 SetConsoleCtrlHandler (shutdown_handler, TRUE);
7317
7318 /* "None" is the default group name on standalone workstations. */
7319 strcpy (dflt_group_name, "None");
7320
7321 /* Reset, in case it has some value inherited from dump time. */
7322 w32_stat_get_owner_group = 0;
7323}
7324
7325/* For make-serial-process */
7326int
7327serial_open (char *port)
7328{
7329 HANDLE hnd;
7330 child_process *cp;
7331 int fd = -1;
7332
7333 hnd = CreateFile (port, GENERIC_READ | GENERIC_WRITE, 0, 0,
7334 OPEN_EXISTING, FILE_FLAG_OVERLAPPED, 0);
7335 if (hnd == INVALID_HANDLE_VALUE)
7336 error ("Could not open %s", port);
7337 fd = (int) _open_osfhandle ((intptr_t) hnd, 0);
7338 if (fd == -1)
7339 error ("Could not open %s", port);
7340
7341 cp = new_child ();
7342 if (!cp)
7343 error ("Could not create child process");
7344 cp->fd = fd;
7345 cp->status = STATUS_READ_ACKNOWLEDGED;
7346 fd_info[ fd ].hnd = hnd;
7347 fd_info[ fd ].flags |=
7348 FILE_READ | FILE_WRITE | FILE_BINARY | FILE_SERIAL;
7349 if (fd_info[ fd ].cp != NULL)
7350 {
7351 error ("fd_info[fd = %d] is already in use", fd);
7352 }
7353 fd_info[ fd ].cp = cp;
7354 cp->ovl_read.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL);
7355 if (cp->ovl_read.hEvent == NULL)
7356 error ("Could not create read event");
7357 cp->ovl_write.hEvent = CreateEvent (NULL, TRUE, FALSE, NULL);
7358 if (cp->ovl_write.hEvent == NULL)
7359 error ("Could not create write event");
7360
7361 return fd;
7362}
7363
7364/* For serial-process-configure */
7365void
7366serial_configure (struct Lisp_Process *p, Lisp_Object contact)
7367{
7368 Lisp_Object childp2 = Qnil;
7369 Lisp_Object tem = Qnil;
7370 HANDLE hnd;
7371 DCB dcb;
7372 COMMTIMEOUTS ct;
7373 char summary[4] = "???"; /* This usually becomes "8N1". */
7374
7375 if ((fd_info[ p->outfd ].flags & FILE_SERIAL) == 0)
7376 error ("Not a serial process");
7377 hnd = fd_info[ p->outfd ].hnd;
7378
7379 childp2 = Fcopy_sequence (p->childp);
7380
7381 /* Initialize timeouts for blocking read and blocking write. */
7382 if (!GetCommTimeouts (hnd, &ct))
7383 error ("GetCommTimeouts() failed");
7384 ct.ReadIntervalTimeout = 0;
7385 ct.ReadTotalTimeoutMultiplier = 0;
7386 ct.ReadTotalTimeoutConstant = 0;
7387 ct.WriteTotalTimeoutMultiplier = 0;
7388 ct.WriteTotalTimeoutConstant = 0;
7389 if (!SetCommTimeouts (hnd, &ct))
7390 error ("SetCommTimeouts() failed");
7391 /* Read port attributes and prepare default configuration. */
7392 memset (&dcb, 0, sizeof (dcb));
7393 dcb.DCBlength = sizeof (DCB);
7394 if (!GetCommState (hnd, &dcb))
7395 error ("GetCommState() failed");
7396 dcb.fBinary = TRUE;
7397 dcb.fNull = FALSE;
7398 dcb.fAbortOnError = FALSE;
7399 /* dcb.XonLim and dcb.XoffLim are set by GetCommState() */
7400 dcb.ErrorChar = 0;
7401 dcb.EofChar = 0;
7402 dcb.EvtChar = 0;
7403
7404 /* Configure speed. */
7405 if (!NILP (Fplist_member (contact, QCspeed)))
7406 tem = Fplist_get (contact, QCspeed);
7407 else
7408 tem = Fplist_get (p->childp, QCspeed);
7409 CHECK_NUMBER (tem);
7410 dcb.BaudRate = XINT (tem);
7411 childp2 = Fplist_put (childp2, QCspeed, tem);
7412
7413 /* Configure bytesize. */
7414 if (!NILP (Fplist_member (contact, QCbytesize)))
7415 tem = Fplist_get (contact, QCbytesize);
7416 else
7417 tem = Fplist_get (p->childp, QCbytesize);
7418 if (NILP (tem))
7419 tem = make_number (8);
7420 CHECK_NUMBER (tem);
7421 if (XINT (tem) != 7 && XINT (tem) != 8)
7422 error (":bytesize must be nil (8), 7, or 8");
7423 dcb.ByteSize = XINT (tem);
7424 summary[0] = XINT (tem) + '0';
7425 childp2 = Fplist_put (childp2, QCbytesize, tem);
7426
7427 /* Configure parity. */
7428 if (!NILP (Fplist_member (contact, QCparity)))
7429 tem = Fplist_get (contact, QCparity);
7430 else
7431 tem = Fplist_get (p->childp, QCparity);
7432 if (!NILP (tem) && !EQ (tem, Qeven) && !EQ (tem, Qodd))
7433 error (":parity must be nil (no parity), `even', or `odd'");
7434 dcb.fParity = FALSE;
7435 dcb.Parity = NOPARITY;
7436 dcb.fErrorChar = FALSE;
7437 if (NILP (tem))
7438 {
7439 summary[1] = 'N';
7440 }
7441 else if (EQ (tem, Qeven))
7442 {
7443 summary[1] = 'E';
7444 dcb.fParity = TRUE;
7445 dcb.Parity = EVENPARITY;
7446 dcb.fErrorChar = TRUE;
7447 }
7448 else if (EQ (tem, Qodd))
7449 {
7450 summary[1] = 'O';
7451 dcb.fParity = TRUE;
7452 dcb.Parity = ODDPARITY;
7453 dcb.fErrorChar = TRUE;
7454 }
7455 childp2 = Fplist_put (childp2, QCparity, tem);
7456
7457 /* Configure stopbits. */
7458 if (!NILP (Fplist_member (contact, QCstopbits)))
7459 tem = Fplist_get (contact, QCstopbits);
7460 else
7461 tem = Fplist_get (p->childp, QCstopbits);
7462 if (NILP (tem))
7463 tem = make_number (1);
7464 CHECK_NUMBER (tem);
7465 if (XINT (tem) != 1 && XINT (tem) != 2)
7466 error (":stopbits must be nil (1 stopbit), 1, or 2");
7467 summary[2] = XINT (tem) + '0';
7468 if (XINT (tem) == 1)
7469 dcb.StopBits = ONESTOPBIT;
7470 else if (XINT (tem) == 2)
7471 dcb.StopBits = TWOSTOPBITS;
7472 childp2 = Fplist_put (childp2, QCstopbits, tem);
7473
7474 /* Configure flowcontrol. */
7475 if (!NILP (Fplist_member (contact, QCflowcontrol)))
7476 tem = Fplist_get (contact, QCflowcontrol);
7477 else
7478 tem = Fplist_get (p->childp, QCflowcontrol);
7479 if (!NILP (tem) && !EQ (tem, Qhw) && !EQ (tem, Qsw))
7480 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
7481 dcb.fOutxCtsFlow = FALSE;
7482 dcb.fOutxDsrFlow = FALSE;
7483 dcb.fDtrControl = DTR_CONTROL_DISABLE;
7484 dcb.fDsrSensitivity = FALSE;
7485 dcb.fTXContinueOnXoff = FALSE;
7486 dcb.fOutX = FALSE;
7487 dcb.fInX = FALSE;
7488 dcb.fRtsControl = RTS_CONTROL_DISABLE;
7489 dcb.XonChar = 17; /* Control-Q */
7490 dcb.XoffChar = 19; /* Control-S */
7491 if (NILP (tem))
7492 {
7493 /* Already configured. */
7494 }
7495 else if (EQ (tem, Qhw))
7496 {
7497 dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
7498 dcb.fOutxCtsFlow = TRUE;
7499 }
7500 else if (EQ (tem, Qsw))
7501 {
7502 dcb.fOutX = TRUE;
7503 dcb.fInX = TRUE;
7504 }
7505 childp2 = Fplist_put (childp2, QCflowcontrol, tem);
7506
7507 /* Activate configuration. */
7508 if (!SetCommState (hnd, &dcb))
7509 error ("SetCommState() failed");
7510
7511 childp2 = Fplist_put (childp2, QCsummary, build_string (summary));
7512 pset_childp (p, childp2);
7513}
7514
7515#ifdef HAVE_GNUTLS
7516
7517ssize_t
7518emacs_gnutls_pull (gnutls_transport_ptr_t p, void* buf, size_t sz)
7519{
7520 int n, sc, err;
7521 SELECT_TYPE fdset;
7522 EMACS_TIME timeout;
7523 struct Lisp_Process *process = (struct Lisp_Process *)p;
7524 int fd = process->infd;
7525
7526 for (;;)
7527 {
7528 n = sys_read (fd, (char*)buf, sz);
7529
7530 if (n >= 0)
7531 return n;
7532
7533 err = errno;
7534
7535 if (err == EWOULDBLOCK)
7536 {
7537 /* Set a small timeout. */
7538 timeout = make_emacs_time (1, 0);
7539 FD_ZERO (&fdset);
7540 FD_SET ((int)fd, &fdset);
7541
7542 /* Use select with the timeout to poll the selector. */
7543 sc = select (fd + 1, &fdset, (SELECT_TYPE *)0, (SELECT_TYPE *)0,
7544 &timeout, NULL);
7545
7546 if (sc > 0)
7547 continue; /* Try again. */
7548
7549 /* Translate the WSAEWOULDBLOCK alias EWOULDBLOCK to EAGAIN.
7550 Also accept select return 0 as an indicator to EAGAIN. */
7551 if (sc == 0 || errno == EWOULDBLOCK)
7552 err = EAGAIN;
7553 else
7554 err = errno; /* Other errors are just passed on. */
7555 }
7556
7557 emacs_gnutls_transport_set_errno (process->gnutls_state, err);
7558
7559 return -1;
7560 }
7561}
7562
7563ssize_t
7564emacs_gnutls_push (gnutls_transport_ptr_t p, const void* buf, size_t sz)
7565{
7566 struct Lisp_Process *process = (struct Lisp_Process *)p;
7567 int fd = process->outfd;
7568 ssize_t n = sys_write (fd, buf, sz);
7569
7570 /* 0 or more bytes written means everything went fine. */
7571 if (n >= 0)
7572 return n;
7573
7574 /* Negative bytes written means we got an error in errno.
7575 Translate the WSAEWOULDBLOCK alias EWOULDBLOCK to EAGAIN. */
7576 emacs_gnutls_transport_set_errno (process->gnutls_state,
7577 errno == EWOULDBLOCK ? EAGAIN : errno);
7578
7579 return -1;
7580}
7581#endif /* HAVE_GNUTLS */
7582
7583/* end of w32.c */
Unnamed repository; edit this file 'description' to name the repository.