1 /* Utility and Unix shadow routines for GNU Emacs on the Microsoft Windows API.
3 Copyright (C) 1994-1995, 2000-2015 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
21 Geoff Voelker (voelker@cs.washington.edu) 7-29-94
24 #include <mingw_time.h>
25 #include <stddef.h> /* for offsetof */
28 #include <float.h> /* for DBL_EPSILON */
35 #include <time.h> /* must be before nt/inc/sys/time.h, for MinGW64 */
37 #include <sys/utime.h>
40 /* must include CRT headers *before* config.h */
43 #include <mbstring.h> /* for _mbspbrk, _mbslwr, _mbsrchr, ... */
70 #include "epaths.h" /* for SHELL */
75 /* MinGW64 defines these in its _mingw.h. */
76 #ifndef _ANONYMOUS_UNION
77 # define _ANONYMOUS_UNION
79 #ifndef _ANONYMOUS_STRUCT
80 # define _ANONYMOUS_STRUCT
83 /* Some versions of compiler define MEMORYSTATUSEX, some don't, so we
84 use a different name to avoid compilation problems. */
85 typedef struct _MEMORY_STATUS_EX
{
88 DWORDLONG ullTotalPhys
;
89 DWORDLONG ullAvailPhys
;
90 DWORDLONG ullTotalPageFile
;
91 DWORDLONG ullAvailPageFile
;
92 DWORDLONG ullTotalVirtual
;
93 DWORDLONG ullAvailVirtual
;
94 DWORDLONG ullAvailExtendedVirtual
;
95 } MEMORY_STATUS_EX
,*LPMEMORY_STATUS_EX
;
97 /* These are here so that GDB would know about these data types. This
98 allows to attach GDB to Emacs when a fatal exception is triggered
99 and Windows pops up the "application needs to be closed" dialog.
100 At that point, _gnu_exception_handler, the top-level exception
101 handler installed by the MinGW startup code, is somewhere on the
102 call-stack of the main thread, so going to that call frame and
103 looking at the argument to _gnu_exception_handler, which is a
104 PEXCEPTION_POINTERS pointer, can reveal the exception code
105 (excptr->ExceptionRecord->ExceptionCode) and the address where the
106 exception happened (excptr->ExceptionRecord->ExceptionAddress), as
107 well as some additional information specific to the exception. */
108 PEXCEPTION_POINTERS excptr
;
109 PEXCEPTION_RECORD excprec
;
115 #include <tlhelp32.h>
120 #if _WIN32_WINNT < 0x0500
121 #if !defined (__MINGW32__) || __W32API_MAJOR_VERSION < 3 || (__W32API_MAJOR_VERSION == 3 && __W32API_MINOR_VERSION < 15)
122 /* This either is not in psapi.h or guarded by higher value of
123 _WIN32_WINNT than what we use. w32api supplied with MinGW 3.15
124 defines it in psapi.h */
125 typedef struct _PROCESS_MEMORY_COUNTERS_EX
{
127 DWORD PageFaultCount
;
128 SIZE_T PeakWorkingSetSize
;
129 SIZE_T WorkingSetSize
;
130 SIZE_T QuotaPeakPagedPoolUsage
;
131 SIZE_T QuotaPagedPoolUsage
;
132 SIZE_T QuotaPeakNonPagedPoolUsage
;
133 SIZE_T QuotaNonPagedPoolUsage
;
134 SIZE_T PagefileUsage
;
135 SIZE_T PeakPagefileUsage
;
137 } PROCESS_MEMORY_COUNTERS_EX
,*PPROCESS_MEMORY_COUNTERS_EX
;
141 #include <winioctl.h>
148 /* This is not in MinGW's sddl.h (but they are in MSVC headers), so we
149 define them by hand if not already defined. */
150 #ifndef SDDL_REVISION_1
151 #define SDDL_REVISION_1 1
152 #endif /* SDDL_REVISION_1 */
154 #if defined(_MSC_VER) || defined(MINGW_W64)
155 /* MSVC and MinGW64 don't provide the definition of
156 REPARSE_DATA_BUFFER and the associated macros, except on ntifs.h,
157 which cannot be included because it triggers conflicts with other
158 Windows API headers. So we define it here by hand. */
160 typedef struct _REPARSE_DATA_BUFFER
{
162 USHORT ReparseDataLength
;
166 USHORT SubstituteNameOffset
;
167 USHORT SubstituteNameLength
;
168 USHORT PrintNameOffset
;
169 USHORT PrintNameLength
;
172 } SymbolicLinkReparseBuffer
;
174 USHORT SubstituteNameOffset
;
175 USHORT SubstituteNameLength
;
176 USHORT PrintNameOffset
;
177 USHORT PrintNameLength
;
179 } MountPointReparseBuffer
;
182 } GenericReparseBuffer
;
184 } REPARSE_DATA_BUFFER
, *PREPARSE_DATA_BUFFER
;
186 #ifndef FILE_DEVICE_FILE_SYSTEM
187 #define FILE_DEVICE_FILE_SYSTEM 9
189 #ifndef METHOD_BUFFERED
190 #define METHOD_BUFFERED 0
192 #ifndef FILE_ANY_ACCESS
193 #define FILE_ANY_ACCESS 0x00000000
196 #define CTL_CODE(t,f,m,a) (((t)<<16)|((a)<<14)|((f)<<2)|(m))
198 /* MinGW64 defines FSCTL_GET_REPARSE_POINT on winioctl.h. */
199 #ifndef FSCTL_GET_REPARSE_POINT
200 #define FSCTL_GET_REPARSE_POINT \
201 CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 42, METHOD_BUFFERED, FILE_ANY_ACCESS)
205 /* TCP connection support. */
206 #include <sys/socket.h>
225 #include <iphlpapi.h> /* should be after winsock2.h */
229 #include "w32common.h"
231 #include "w32select.h"
233 #include "dispextern.h" /* for xstrcasecmp */
234 #include "coding.h" /* for Vlocale_coding_system */
236 #include "careadlinkat.h"
237 #include "allocator.h"
239 /* For serial_configure and serial_open. */
242 typedef HRESULT (WINAPI
* ShGetFolderPath_fn
)
243 (IN HWND
, IN
int, IN HANDLE
, IN DWORD
, OUT
char *);
245 void globals_of_w32 (void);
246 static DWORD
get_rid (PSID
);
247 static int is_symlink (const char *);
248 static char * chase_symlinks (const char *);
249 static int enable_privilege (LPCTSTR
, BOOL
, TOKEN_PRIVILEGES
*);
250 static int restore_privilege (TOKEN_PRIVILEGES
*);
251 static BOOL WINAPI
revert_to_self (void);
253 static int sys_access (const char *, int);
254 extern void *e_malloc (size_t);
255 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
256 struct timespec
*, void *);
257 extern int sys_dup (int);
262 /* Initialization states.
264 WARNING: If you add any more such variables for additional APIs,
265 you MUST add initialization for them to globals_of_w32
266 below. This is because these variables might get set
267 to non-NULL values during dumping, but the dumped Emacs
268 cannot reuse those values, because it could be run on a
269 different version of the OS, where API addresses are
271 static BOOL g_b_init_is_windows_9x
;
272 static BOOL g_b_init_open_process_token
;
273 static BOOL g_b_init_get_token_information
;
274 static BOOL g_b_init_lookup_account_sid
;
275 static BOOL g_b_init_get_sid_sub_authority
;
276 static BOOL g_b_init_get_sid_sub_authority_count
;
277 static BOOL g_b_init_get_security_info
;
278 static BOOL g_b_init_get_file_security_w
;
279 static BOOL g_b_init_get_file_security_a
;
280 static BOOL g_b_init_get_security_descriptor_owner
;
281 static BOOL g_b_init_get_security_descriptor_group
;
282 static BOOL g_b_init_is_valid_sid
;
283 static BOOL g_b_init_create_toolhelp32_snapshot
;
284 static BOOL g_b_init_process32_first
;
285 static BOOL g_b_init_process32_next
;
286 static BOOL g_b_init_open_thread_token
;
287 static BOOL g_b_init_impersonate_self
;
288 static BOOL g_b_init_revert_to_self
;
289 static BOOL g_b_init_get_process_memory_info
;
290 static BOOL g_b_init_get_process_working_set_size
;
291 static BOOL g_b_init_global_memory_status
;
292 static BOOL g_b_init_global_memory_status_ex
;
293 static BOOL g_b_init_get_length_sid
;
294 static BOOL g_b_init_equal_sid
;
295 static BOOL g_b_init_copy_sid
;
296 static BOOL g_b_init_get_native_system_info
;
297 static BOOL g_b_init_get_system_times
;
298 static BOOL g_b_init_create_symbolic_link_w
;
299 static BOOL g_b_init_create_symbolic_link_a
;
300 static BOOL g_b_init_get_security_descriptor_dacl
;
301 static BOOL g_b_init_convert_sd_to_sddl
;
302 static BOOL g_b_init_convert_sddl_to_sd
;
303 static BOOL g_b_init_is_valid_security_descriptor
;
304 static BOOL g_b_init_set_file_security_w
;
305 static BOOL g_b_init_set_file_security_a
;
306 static BOOL g_b_init_set_named_security_info_w
;
307 static BOOL g_b_init_set_named_security_info_a
;
308 static BOOL g_b_init_get_adapters_info
;
310 BOOL g_b_init_compare_string_w
;
313 BEGIN: Wrapper functions around OpenProcessToken
314 and other functions in advapi32.dll that are only
315 supported in Windows NT / 2k / XP
317 /* ** Function pointer typedefs ** */
318 typedef BOOL (WINAPI
* OpenProcessToken_Proc
) (
319 HANDLE ProcessHandle
,
321 PHANDLE TokenHandle
);
322 typedef BOOL (WINAPI
* GetTokenInformation_Proc
) (
324 TOKEN_INFORMATION_CLASS TokenInformationClass
,
325 LPVOID TokenInformation
,
326 DWORD TokenInformationLength
,
327 PDWORD ReturnLength
);
328 typedef BOOL (WINAPI
* GetProcessTimes_Proc
) (
329 HANDLE process_handle
,
330 LPFILETIME creation_time
,
331 LPFILETIME exit_time
,
332 LPFILETIME kernel_time
,
333 LPFILETIME user_time
);
335 GetProcessTimes_Proc get_process_times_fn
= NULL
;
338 const char * const LookupAccountSid_Name
= "LookupAccountSidW";
340 const char * const LookupAccountSid_Name
= "LookupAccountSidA";
342 typedef BOOL (WINAPI
* LookupAccountSid_Proc
) (
343 LPCTSTR lpSystemName
,
348 LPDWORD cbDomainName
,
349 PSID_NAME_USE peUse
);
350 typedef PDWORD (WINAPI
* GetSidSubAuthority_Proc
) (
353 typedef PUCHAR (WINAPI
* GetSidSubAuthorityCount_Proc
) (
355 typedef DWORD (WINAPI
* GetSecurityInfo_Proc
) (
357 SE_OBJECT_TYPE ObjectType
,
358 SECURITY_INFORMATION SecurityInfo
,
363 PSECURITY_DESCRIPTOR
*ppSecurityDescriptor
);
364 typedef BOOL (WINAPI
* GetFileSecurityW_Proc
) (
366 SECURITY_INFORMATION RequestedInformation
,
367 PSECURITY_DESCRIPTOR pSecurityDescriptor
,
369 LPDWORD lpnLengthNeeded
);
370 typedef BOOL (WINAPI
* GetFileSecurityA_Proc
) (
372 SECURITY_INFORMATION RequestedInformation
,
373 PSECURITY_DESCRIPTOR pSecurityDescriptor
,
375 LPDWORD lpnLengthNeeded
);
376 typedef BOOL (WINAPI
*SetFileSecurityW_Proc
) (
378 SECURITY_INFORMATION SecurityInformation
,
379 PSECURITY_DESCRIPTOR pSecurityDescriptor
);
380 typedef BOOL (WINAPI
*SetFileSecurityA_Proc
) (
382 SECURITY_INFORMATION SecurityInformation
,
383 PSECURITY_DESCRIPTOR pSecurityDescriptor
);
384 typedef DWORD (WINAPI
*SetNamedSecurityInfoW_Proc
) (
385 LPCWSTR lpObjectName
,
386 SE_OBJECT_TYPE ObjectType
,
387 SECURITY_INFORMATION SecurityInformation
,
392 typedef DWORD (WINAPI
*SetNamedSecurityInfoA_Proc
) (
394 SE_OBJECT_TYPE ObjectType
,
395 SECURITY_INFORMATION SecurityInformation
,
400 typedef BOOL (WINAPI
* GetSecurityDescriptorOwner_Proc
) (
401 PSECURITY_DESCRIPTOR pSecurityDescriptor
,
403 LPBOOL lpbOwnerDefaulted
);
404 typedef BOOL (WINAPI
* GetSecurityDescriptorGroup_Proc
) (
405 PSECURITY_DESCRIPTOR pSecurityDescriptor
,
407 LPBOOL lpbGroupDefaulted
);
408 typedef BOOL (WINAPI
*GetSecurityDescriptorDacl_Proc
) (
409 PSECURITY_DESCRIPTOR pSecurityDescriptor
,
410 LPBOOL lpbDaclPresent
,
412 LPBOOL lpbDaclDefaulted
);
413 typedef BOOL (WINAPI
* IsValidSid_Proc
) (
415 typedef HANDLE (WINAPI
* CreateToolhelp32Snapshot_Proc
) (
417 DWORD th32ProcessID
);
418 typedef BOOL (WINAPI
* Process32First_Proc
) (
420 LPPROCESSENTRY32 lppe
);
421 typedef BOOL (WINAPI
* Process32Next_Proc
) (
423 LPPROCESSENTRY32 lppe
);
424 typedef BOOL (WINAPI
* OpenThreadToken_Proc
) (
428 PHANDLE TokenHandle
);
429 typedef BOOL (WINAPI
* ImpersonateSelf_Proc
) (
430 SECURITY_IMPERSONATION_LEVEL ImpersonationLevel
);
431 typedef BOOL (WINAPI
* RevertToSelf_Proc
) (void);
432 typedef BOOL (WINAPI
* GetProcessMemoryInfo_Proc
) (
434 PPROCESS_MEMORY_COUNTERS ppsmemCounters
,
436 typedef BOOL (WINAPI
* GetProcessWorkingSetSize_Proc
) (
438 PSIZE_T lpMinimumWorkingSetSize
,
439 PSIZE_T lpMaximumWorkingSetSize
);
440 typedef BOOL (WINAPI
* GlobalMemoryStatus_Proc
) (
441 LPMEMORYSTATUS lpBuffer
);
442 typedef BOOL (WINAPI
* GlobalMemoryStatusEx_Proc
) (
443 LPMEMORY_STATUS_EX lpBuffer
);
444 typedef BOOL (WINAPI
* CopySid_Proc
) (
445 DWORD nDestinationSidLength
,
446 PSID pDestinationSid
,
448 typedef BOOL (WINAPI
* EqualSid_Proc
) (
451 typedef DWORD (WINAPI
* GetLengthSid_Proc
) (
453 typedef void (WINAPI
* GetNativeSystemInfo_Proc
) (
454 LPSYSTEM_INFO lpSystemInfo
);
455 typedef BOOL (WINAPI
* GetSystemTimes_Proc
) (
456 LPFILETIME lpIdleTime
,
457 LPFILETIME lpKernelTime
,
458 LPFILETIME lpUserTime
);
459 typedef BOOLEAN (WINAPI
*CreateSymbolicLinkW_Proc
) (
460 LPCWSTR lpSymlinkFileName
,
461 LPCWSTR lpTargetFileName
,
463 typedef BOOLEAN (WINAPI
*CreateSymbolicLinkA_Proc
) (
464 LPCSTR lpSymlinkFileName
,
465 LPCSTR lpTargetFileName
,
467 typedef BOOL (WINAPI
*ConvertStringSecurityDescriptorToSecurityDescriptor_Proc
) (
468 LPCTSTR StringSecurityDescriptor
,
469 DWORD StringSDRevision
,
470 PSECURITY_DESCRIPTOR
*SecurityDescriptor
,
471 PULONG SecurityDescriptorSize
);
472 typedef BOOL (WINAPI
*ConvertSecurityDescriptorToStringSecurityDescriptor_Proc
) (
473 PSECURITY_DESCRIPTOR SecurityDescriptor
,
474 DWORD RequestedStringSDRevision
,
475 SECURITY_INFORMATION SecurityInformation
,
476 LPTSTR
*StringSecurityDescriptor
,
477 PULONG StringSecurityDescriptorLen
);
478 typedef BOOL (WINAPI
*IsValidSecurityDescriptor_Proc
) (PSECURITY_DESCRIPTOR
);
479 typedef DWORD (WINAPI
*GetAdaptersInfo_Proc
) (
480 PIP_ADAPTER_INFO pAdapterInfo
,
483 int (WINAPI
*pMultiByteToWideChar
)(UINT
,DWORD
,LPCSTR
,int,LPWSTR
,int);
484 int (WINAPI
*pWideCharToMultiByte
)(UINT
,DWORD
,LPCWSTR
,int,LPSTR
,int,LPCSTR
,LPBOOL
);
486 /* ** A utility function ** */
490 static BOOL s_b_ret
= 0;
491 OSVERSIONINFO os_ver
;
492 if (g_b_init_is_windows_9x
== 0)
494 g_b_init_is_windows_9x
= 1;
495 ZeroMemory (&os_ver
, sizeof (OSVERSIONINFO
));
496 os_ver
.dwOSVersionInfoSize
= sizeof (OSVERSIONINFO
);
497 if (GetVersionEx (&os_ver
))
499 s_b_ret
= (os_ver
.dwPlatformId
== VER_PLATFORM_WIN32_WINDOWS
);
505 static Lisp_Object
ltime (ULONGLONG
);
507 /* Get total user and system times for get-internal-run-time.
508 Returns a list of integers if the times are provided by the OS
509 (NT derivatives), otherwise it returns the result of current-time. */
511 w32_get_internal_run_time (void)
513 if (get_process_times_fn
)
515 FILETIME create
, exit
, kernel
, user
;
516 HANDLE proc
= GetCurrentProcess ();
517 if ((*get_process_times_fn
) (proc
, &create
, &exit
, &kernel
, &user
))
519 LARGE_INTEGER user_int
, kernel_int
, total
;
520 user_int
.LowPart
= user
.dwLowDateTime
;
521 user_int
.HighPart
= user
.dwHighDateTime
;
522 kernel_int
.LowPart
= kernel
.dwLowDateTime
;
523 kernel_int
.HighPart
= kernel
.dwHighDateTime
;
524 total
.QuadPart
= user_int
.QuadPart
+ kernel_int
.QuadPart
;
525 return ltime (total
.QuadPart
);
529 return Fcurrent_time ();
532 /* ** The wrapper functions ** */
535 open_process_token (HANDLE ProcessHandle
,
539 static OpenProcessToken_Proc s_pfn_Open_Process_Token
= NULL
;
540 HMODULE hm_advapi32
= NULL
;
541 if (is_windows_9x () == TRUE
)
545 if (g_b_init_open_process_token
== 0)
547 g_b_init_open_process_token
= 1;
548 hm_advapi32
= LoadLibrary ("Advapi32.dll");
549 s_pfn_Open_Process_Token
=
550 (OpenProcessToken_Proc
) GetProcAddress (hm_advapi32
, "OpenProcessToken");
552 if (s_pfn_Open_Process_Token
== NULL
)
557 s_pfn_Open_Process_Token (
565 get_token_information (HANDLE TokenHandle
,
566 TOKEN_INFORMATION_CLASS TokenInformationClass
,
567 LPVOID TokenInformation
,
568 DWORD TokenInformationLength
,
571 static GetTokenInformation_Proc s_pfn_Get_Token_Information
= NULL
;
572 HMODULE hm_advapi32
= NULL
;
573 if (is_windows_9x () == TRUE
)
577 if (g_b_init_get_token_information
== 0)
579 g_b_init_get_token_information
= 1;
580 hm_advapi32
= LoadLibrary ("Advapi32.dll");
581 s_pfn_Get_Token_Information
=
582 (GetTokenInformation_Proc
) GetProcAddress (hm_advapi32
, "GetTokenInformation");
584 if (s_pfn_Get_Token_Information
== NULL
)
589 s_pfn_Get_Token_Information (
591 TokenInformationClass
,
593 TokenInformationLength
,
599 lookup_account_sid (LPCTSTR lpSystemName
,
604 LPDWORD cbDomainName
,
607 static LookupAccountSid_Proc s_pfn_Lookup_Account_Sid
= NULL
;
608 HMODULE hm_advapi32
= NULL
;
609 if (is_windows_9x () == TRUE
)
613 if (g_b_init_lookup_account_sid
== 0)
615 g_b_init_lookup_account_sid
= 1;
616 hm_advapi32
= LoadLibrary ("Advapi32.dll");
617 s_pfn_Lookup_Account_Sid
=
618 (LookupAccountSid_Proc
) GetProcAddress (hm_advapi32
, LookupAccountSid_Name
);
620 if (s_pfn_Lookup_Account_Sid
== NULL
)
625 s_pfn_Lookup_Account_Sid (
637 get_sid_sub_authority (PSID pSid
, DWORD n
)
639 static GetSidSubAuthority_Proc s_pfn_Get_Sid_Sub_Authority
= NULL
;
640 static DWORD zero
= 0U;
641 HMODULE hm_advapi32
= NULL
;
642 if (is_windows_9x () == TRUE
)
646 if (g_b_init_get_sid_sub_authority
== 0)
648 g_b_init_get_sid_sub_authority
= 1;
649 hm_advapi32
= LoadLibrary ("Advapi32.dll");
650 s_pfn_Get_Sid_Sub_Authority
=
651 (GetSidSubAuthority_Proc
) GetProcAddress (
652 hm_advapi32
, "GetSidSubAuthority");
654 if (s_pfn_Get_Sid_Sub_Authority
== NULL
)
658 return (s_pfn_Get_Sid_Sub_Authority (pSid
, n
));
662 get_sid_sub_authority_count (PSID pSid
)
664 static GetSidSubAuthorityCount_Proc s_pfn_Get_Sid_Sub_Authority_Count
= NULL
;
665 static UCHAR zero
= 0U;
666 HMODULE hm_advapi32
= NULL
;
667 if (is_windows_9x () == TRUE
)
671 if (g_b_init_get_sid_sub_authority_count
== 0)
673 g_b_init_get_sid_sub_authority_count
= 1;
674 hm_advapi32
= LoadLibrary ("Advapi32.dll");
675 s_pfn_Get_Sid_Sub_Authority_Count
=
676 (GetSidSubAuthorityCount_Proc
) GetProcAddress (
677 hm_advapi32
, "GetSidSubAuthorityCount");
679 if (s_pfn_Get_Sid_Sub_Authority_Count
== NULL
)
683 return (s_pfn_Get_Sid_Sub_Authority_Count (pSid
));
687 get_security_info (HANDLE handle
,
688 SE_OBJECT_TYPE ObjectType
,
689 SECURITY_INFORMATION SecurityInfo
,
694 PSECURITY_DESCRIPTOR
*ppSecurityDescriptor
)
696 static GetSecurityInfo_Proc s_pfn_Get_Security_Info
= NULL
;
697 HMODULE hm_advapi32
= NULL
;
698 if (is_windows_9x () == TRUE
)
702 if (g_b_init_get_security_info
== 0)
704 g_b_init_get_security_info
= 1;
705 hm_advapi32
= LoadLibrary ("Advapi32.dll");
706 s_pfn_Get_Security_Info
=
707 (GetSecurityInfo_Proc
) GetProcAddress (
708 hm_advapi32
, "GetSecurityInfo");
710 if (s_pfn_Get_Security_Info
== NULL
)
714 return (s_pfn_Get_Security_Info (handle
, ObjectType
, SecurityInfo
,
715 ppsidOwner
, ppsidGroup
, ppDacl
, ppSacl
,
716 ppSecurityDescriptor
));
720 get_file_security (const char *lpFileName
,
721 SECURITY_INFORMATION RequestedInformation
,
722 PSECURITY_DESCRIPTOR pSecurityDescriptor
,
724 LPDWORD lpnLengthNeeded
)
726 static GetFileSecurityA_Proc s_pfn_Get_File_SecurityA
= NULL
;
727 static GetFileSecurityW_Proc s_pfn_Get_File_SecurityW
= NULL
;
728 HMODULE hm_advapi32
= NULL
;
729 if (is_windows_9x () == TRUE
)
734 if (w32_unicode_filenames
)
736 wchar_t filename_w
[MAX_PATH
];
738 if (g_b_init_get_file_security_w
== 0)
740 g_b_init_get_file_security_w
= 1;
741 hm_advapi32
= LoadLibrary ("Advapi32.dll");
742 s_pfn_Get_File_SecurityW
=
743 (GetFileSecurityW_Proc
) GetProcAddress (hm_advapi32
,
746 if (s_pfn_Get_File_SecurityW
== NULL
)
751 filename_to_utf16 (lpFileName
, filename_w
);
752 return (s_pfn_Get_File_SecurityW (filename_w
, RequestedInformation
,
753 pSecurityDescriptor
, nLength
,
758 char filename_a
[MAX_PATH
];
760 if (g_b_init_get_file_security_a
== 0)
762 g_b_init_get_file_security_a
= 1;
763 hm_advapi32
= LoadLibrary ("Advapi32.dll");
764 s_pfn_Get_File_SecurityA
=
765 (GetFileSecurityA_Proc
) GetProcAddress (hm_advapi32
,
768 if (s_pfn_Get_File_SecurityA
== NULL
)
773 filename_to_ansi (lpFileName
, filename_a
);
774 return (s_pfn_Get_File_SecurityA (filename_a
, RequestedInformation
,
775 pSecurityDescriptor
, nLength
,
781 set_file_security (const char *lpFileName
,
782 SECURITY_INFORMATION SecurityInformation
,
783 PSECURITY_DESCRIPTOR pSecurityDescriptor
)
785 static SetFileSecurityW_Proc s_pfn_Set_File_SecurityW
= NULL
;
786 static SetFileSecurityA_Proc s_pfn_Set_File_SecurityA
= NULL
;
787 HMODULE hm_advapi32
= NULL
;
788 if (is_windows_9x () == TRUE
)
793 if (w32_unicode_filenames
)
795 wchar_t filename_w
[MAX_PATH
];
797 if (g_b_init_set_file_security_w
== 0)
799 g_b_init_set_file_security_w
= 1;
800 hm_advapi32
= LoadLibrary ("Advapi32.dll");
801 s_pfn_Set_File_SecurityW
=
802 (SetFileSecurityW_Proc
) GetProcAddress (hm_advapi32
,
805 if (s_pfn_Set_File_SecurityW
== NULL
)
810 filename_to_utf16 (lpFileName
, filename_w
);
811 return (s_pfn_Set_File_SecurityW (filename_w
, SecurityInformation
,
812 pSecurityDescriptor
));
816 char filename_a
[MAX_PATH
];
818 if (g_b_init_set_file_security_a
== 0)
820 g_b_init_set_file_security_a
= 1;
821 hm_advapi32
= LoadLibrary ("Advapi32.dll");
822 s_pfn_Set_File_SecurityA
=
823 (SetFileSecurityA_Proc
) GetProcAddress (hm_advapi32
,
826 if (s_pfn_Set_File_SecurityA
== NULL
)
831 filename_to_ansi (lpFileName
, filename_a
);
832 return (s_pfn_Set_File_SecurityA (filename_a
, SecurityInformation
,
833 pSecurityDescriptor
));
838 set_named_security_info (LPCTSTR lpObjectName
,
839 SE_OBJECT_TYPE ObjectType
,
840 SECURITY_INFORMATION SecurityInformation
,
846 static SetNamedSecurityInfoW_Proc s_pfn_Set_Named_Security_InfoW
= NULL
;
847 static SetNamedSecurityInfoA_Proc s_pfn_Set_Named_Security_InfoA
= NULL
;
848 HMODULE hm_advapi32
= NULL
;
849 if (is_windows_9x () == TRUE
)
854 if (w32_unicode_filenames
)
856 wchar_t filename_w
[MAX_PATH
];
858 if (g_b_init_set_named_security_info_w
== 0)
860 g_b_init_set_named_security_info_w
= 1;
861 hm_advapi32
= LoadLibrary ("Advapi32.dll");
862 s_pfn_Set_Named_Security_InfoW
=
863 (SetNamedSecurityInfoW_Proc
) GetProcAddress (hm_advapi32
,
864 "SetNamedSecurityInfoW");
866 if (s_pfn_Set_Named_Security_InfoW
== NULL
)
871 filename_to_utf16 (lpObjectName
, filename_w
);
872 return (s_pfn_Set_Named_Security_InfoW (filename_w
, ObjectType
,
873 SecurityInformation
, psidOwner
,
874 psidGroup
, pDacl
, pSacl
));
878 char filename_a
[MAX_PATH
];
880 if (g_b_init_set_named_security_info_a
== 0)
882 g_b_init_set_named_security_info_a
= 1;
883 hm_advapi32
= LoadLibrary ("Advapi32.dll");
884 s_pfn_Set_Named_Security_InfoA
=
885 (SetNamedSecurityInfoA_Proc
) GetProcAddress (hm_advapi32
,
886 "SetNamedSecurityInfoA");
888 if (s_pfn_Set_Named_Security_InfoA
== NULL
)
893 filename_to_ansi (lpObjectName
, filename_a
);
894 return (s_pfn_Set_Named_Security_InfoA (filename_a
, ObjectType
,
895 SecurityInformation
, psidOwner
,
896 psidGroup
, pDacl
, pSacl
));
901 get_security_descriptor_owner (PSECURITY_DESCRIPTOR pSecurityDescriptor
,
903 LPBOOL lpbOwnerDefaulted
)
905 static GetSecurityDescriptorOwner_Proc s_pfn_Get_Security_Descriptor_Owner
= NULL
;
906 HMODULE hm_advapi32
= NULL
;
907 if (is_windows_9x () == TRUE
)
912 if (g_b_init_get_security_descriptor_owner
== 0)
914 g_b_init_get_security_descriptor_owner
= 1;
915 hm_advapi32
= LoadLibrary ("Advapi32.dll");
916 s_pfn_Get_Security_Descriptor_Owner
=
917 (GetSecurityDescriptorOwner_Proc
) GetProcAddress (
918 hm_advapi32
, "GetSecurityDescriptorOwner");
920 if (s_pfn_Get_Security_Descriptor_Owner
== NULL
)
925 return (s_pfn_Get_Security_Descriptor_Owner (pSecurityDescriptor
, pOwner
,
930 get_security_descriptor_group (PSECURITY_DESCRIPTOR pSecurityDescriptor
,
932 LPBOOL lpbGroupDefaulted
)
934 static GetSecurityDescriptorGroup_Proc s_pfn_Get_Security_Descriptor_Group
= NULL
;
935 HMODULE hm_advapi32
= NULL
;
936 if (is_windows_9x () == TRUE
)
941 if (g_b_init_get_security_descriptor_group
== 0)
943 g_b_init_get_security_descriptor_group
= 1;
944 hm_advapi32
= LoadLibrary ("Advapi32.dll");
945 s_pfn_Get_Security_Descriptor_Group
=
946 (GetSecurityDescriptorGroup_Proc
) GetProcAddress (
947 hm_advapi32
, "GetSecurityDescriptorGroup");
949 if (s_pfn_Get_Security_Descriptor_Group
== NULL
)
954 return (s_pfn_Get_Security_Descriptor_Group (pSecurityDescriptor
, pGroup
,
959 get_security_descriptor_dacl (PSECURITY_DESCRIPTOR pSecurityDescriptor
,
960 LPBOOL lpbDaclPresent
,
962 LPBOOL lpbDaclDefaulted
)
964 static GetSecurityDescriptorDacl_Proc s_pfn_Get_Security_Descriptor_Dacl
= NULL
;
965 HMODULE hm_advapi32
= NULL
;
966 if (is_windows_9x () == TRUE
)
971 if (g_b_init_get_security_descriptor_dacl
== 0)
973 g_b_init_get_security_descriptor_dacl
= 1;
974 hm_advapi32
= LoadLibrary ("Advapi32.dll");
975 s_pfn_Get_Security_Descriptor_Dacl
=
976 (GetSecurityDescriptorDacl_Proc
) GetProcAddress (
977 hm_advapi32
, "GetSecurityDescriptorDacl");
979 if (s_pfn_Get_Security_Descriptor_Dacl
== NULL
)
984 return (s_pfn_Get_Security_Descriptor_Dacl (pSecurityDescriptor
,
985 lpbDaclPresent
, pDacl
,
990 is_valid_sid (PSID sid
)
992 static IsValidSid_Proc s_pfn_Is_Valid_Sid
= NULL
;
993 HMODULE hm_advapi32
= NULL
;
994 if (is_windows_9x () == TRUE
)
998 if (g_b_init_is_valid_sid
== 0)
1000 g_b_init_is_valid_sid
= 1;
1001 hm_advapi32
= LoadLibrary ("Advapi32.dll");
1002 s_pfn_Is_Valid_Sid
=
1003 (IsValidSid_Proc
) GetProcAddress (
1004 hm_advapi32
, "IsValidSid");
1006 if (s_pfn_Is_Valid_Sid
== NULL
)
1010 return (s_pfn_Is_Valid_Sid (sid
));
1014 equal_sid (PSID sid1
, PSID sid2
)
1016 static EqualSid_Proc s_pfn_Equal_Sid
= NULL
;
1017 HMODULE hm_advapi32
= NULL
;
1018 if (is_windows_9x () == TRUE
)
1022 if (g_b_init_equal_sid
== 0)
1024 g_b_init_equal_sid
= 1;
1025 hm_advapi32
= LoadLibrary ("Advapi32.dll");
1027 (EqualSid_Proc
) GetProcAddress (
1028 hm_advapi32
, "EqualSid");
1030 if (s_pfn_Equal_Sid
== NULL
)
1034 return (s_pfn_Equal_Sid (sid1
, sid2
));
1038 get_length_sid (PSID sid
)
1040 static GetLengthSid_Proc s_pfn_Get_Length_Sid
= NULL
;
1041 HMODULE hm_advapi32
= NULL
;
1042 if (is_windows_9x () == TRUE
)
1046 if (g_b_init_get_length_sid
== 0)
1048 g_b_init_get_length_sid
= 1;
1049 hm_advapi32
= LoadLibrary ("Advapi32.dll");
1050 s_pfn_Get_Length_Sid
=
1051 (GetLengthSid_Proc
) GetProcAddress (
1052 hm_advapi32
, "GetLengthSid");
1054 if (s_pfn_Get_Length_Sid
== NULL
)
1058 return (s_pfn_Get_Length_Sid (sid
));
1062 copy_sid (DWORD destlen
, PSID dest
, PSID src
)
1064 static CopySid_Proc s_pfn_Copy_Sid
= NULL
;
1065 HMODULE hm_advapi32
= NULL
;
1066 if (is_windows_9x () == TRUE
)
1070 if (g_b_init_copy_sid
== 0)
1072 g_b_init_copy_sid
= 1;
1073 hm_advapi32
= LoadLibrary ("Advapi32.dll");
1075 (CopySid_Proc
) GetProcAddress (
1076 hm_advapi32
, "CopySid");
1078 if (s_pfn_Copy_Sid
== NULL
)
1082 return (s_pfn_Copy_Sid (destlen
, dest
, src
));
1086 END: Wrapper functions around OpenProcessToken
1087 and other functions in advapi32.dll that are only
1088 supported in Windows NT / 2k / XP
1092 get_native_system_info (LPSYSTEM_INFO lpSystemInfo
)
1094 static GetNativeSystemInfo_Proc s_pfn_Get_Native_System_Info
= NULL
;
1095 if (is_windows_9x () != TRUE
)
1097 if (g_b_init_get_native_system_info
== 0)
1099 g_b_init_get_native_system_info
= 1;
1100 s_pfn_Get_Native_System_Info
=
1101 (GetNativeSystemInfo_Proc
)GetProcAddress (GetModuleHandle ("kernel32.dll"),
1102 "GetNativeSystemInfo");
1104 if (s_pfn_Get_Native_System_Info
!= NULL
)
1105 s_pfn_Get_Native_System_Info (lpSystemInfo
);
1108 lpSystemInfo
->dwNumberOfProcessors
= -1;
1112 get_system_times (LPFILETIME lpIdleTime
,
1113 LPFILETIME lpKernelTime
,
1114 LPFILETIME lpUserTime
)
1116 static GetSystemTimes_Proc s_pfn_Get_System_times
= NULL
;
1117 if (is_windows_9x () == TRUE
)
1121 if (g_b_init_get_system_times
== 0)
1123 g_b_init_get_system_times
= 1;
1124 s_pfn_Get_System_times
=
1125 (GetSystemTimes_Proc
)GetProcAddress (GetModuleHandle ("kernel32.dll"),
1128 if (s_pfn_Get_System_times
== NULL
)
1130 return (s_pfn_Get_System_times (lpIdleTime
, lpKernelTime
, lpUserTime
));
1133 static BOOLEAN WINAPI
1134 create_symbolic_link (LPCSTR lpSymlinkFilename
,
1135 LPCSTR lpTargetFileName
,
1138 static CreateSymbolicLinkW_Proc s_pfn_Create_Symbolic_LinkW
= NULL
;
1139 static CreateSymbolicLinkA_Proc s_pfn_Create_Symbolic_LinkA
= NULL
;
1142 if (is_windows_9x () == TRUE
)
1147 if (w32_unicode_filenames
)
1149 wchar_t symfn_w
[MAX_PATH
], tgtfn_w
[MAX_PATH
];
1151 if (g_b_init_create_symbolic_link_w
== 0)
1153 g_b_init_create_symbolic_link_w
= 1;
1154 s_pfn_Create_Symbolic_LinkW
=
1155 (CreateSymbolicLinkW_Proc
)GetProcAddress (GetModuleHandle ("kernel32.dll"),
1156 "CreateSymbolicLinkW");
1158 if (s_pfn_Create_Symbolic_LinkW
== NULL
)
1164 filename_to_utf16 (lpSymlinkFilename
, symfn_w
);
1165 filename_to_utf16 (lpTargetFileName
, tgtfn_w
);
1166 retval
= s_pfn_Create_Symbolic_LinkW (symfn_w
, tgtfn_w
, dwFlags
);
1167 /* If we were denied creation of the symlink, try again after
1168 enabling the SeCreateSymbolicLinkPrivilege for our process. */
1171 TOKEN_PRIVILEGES priv_current
;
1173 if (enable_privilege (SE_CREATE_SYMBOLIC_LINK_NAME
, TRUE
,
1176 retval
= s_pfn_Create_Symbolic_LinkW (symfn_w
, tgtfn_w
, dwFlags
);
1177 restore_privilege (&priv_current
);
1184 char symfn_a
[MAX_PATH
], tgtfn_a
[MAX_PATH
];
1186 if (g_b_init_create_symbolic_link_a
== 0)
1188 g_b_init_create_symbolic_link_a
= 1;
1189 s_pfn_Create_Symbolic_LinkA
=
1190 (CreateSymbolicLinkA_Proc
)GetProcAddress (GetModuleHandle ("kernel32.dll"),
1191 "CreateSymbolicLinkA");
1193 if (s_pfn_Create_Symbolic_LinkA
== NULL
)
1199 filename_to_ansi (lpSymlinkFilename
, symfn_a
);
1200 filename_to_ansi (lpTargetFileName
, tgtfn_a
);
1201 retval
= s_pfn_Create_Symbolic_LinkA (symfn_a
, tgtfn_a
, dwFlags
);
1202 /* If we were denied creation of the symlink, try again after
1203 enabling the SeCreateSymbolicLinkPrivilege for our process. */
1206 TOKEN_PRIVILEGES priv_current
;
1208 if (enable_privilege (SE_CREATE_SYMBOLIC_LINK_NAME
, TRUE
,
1211 retval
= s_pfn_Create_Symbolic_LinkA (symfn_a
, tgtfn_a
, dwFlags
);
1212 restore_privilege (&priv_current
);
1221 is_valid_security_descriptor (PSECURITY_DESCRIPTOR pSecurityDescriptor
)
1223 static IsValidSecurityDescriptor_Proc s_pfn_Is_Valid_Security_Descriptor_Proc
= NULL
;
1225 if (is_windows_9x () == TRUE
)
1231 if (g_b_init_is_valid_security_descriptor
== 0)
1233 g_b_init_is_valid_security_descriptor
= 1;
1234 s_pfn_Is_Valid_Security_Descriptor_Proc
=
1235 (IsValidSecurityDescriptor_Proc
)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1236 "IsValidSecurityDescriptor");
1238 if (s_pfn_Is_Valid_Security_Descriptor_Proc
== NULL
)
1244 return s_pfn_Is_Valid_Security_Descriptor_Proc (pSecurityDescriptor
);
1248 convert_sd_to_sddl (PSECURITY_DESCRIPTOR SecurityDescriptor
,
1249 DWORD RequestedStringSDRevision
,
1250 SECURITY_INFORMATION SecurityInformation
,
1251 LPTSTR
*StringSecurityDescriptor
,
1252 PULONG StringSecurityDescriptorLen
)
1254 static ConvertSecurityDescriptorToStringSecurityDescriptor_Proc s_pfn_Convert_SD_To_SDDL
= NULL
;
1257 if (is_windows_9x () == TRUE
)
1263 if (g_b_init_convert_sd_to_sddl
== 0)
1265 g_b_init_convert_sd_to_sddl
= 1;
1267 s_pfn_Convert_SD_To_SDDL
=
1268 (ConvertSecurityDescriptorToStringSecurityDescriptor_Proc
)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1269 "ConvertSecurityDescriptorToStringSecurityDescriptorW");
1271 s_pfn_Convert_SD_To_SDDL
=
1272 (ConvertSecurityDescriptorToStringSecurityDescriptor_Proc
)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1273 "ConvertSecurityDescriptorToStringSecurityDescriptorA");
1276 if (s_pfn_Convert_SD_To_SDDL
== NULL
)
1282 retval
= s_pfn_Convert_SD_To_SDDL (SecurityDescriptor
,
1283 RequestedStringSDRevision
,
1284 SecurityInformation
,
1285 StringSecurityDescriptor
,
1286 StringSecurityDescriptorLen
);
1292 convert_sddl_to_sd (LPCTSTR StringSecurityDescriptor
,
1293 DWORD StringSDRevision
,
1294 PSECURITY_DESCRIPTOR
*SecurityDescriptor
,
1295 PULONG SecurityDescriptorSize
)
1297 static ConvertStringSecurityDescriptorToSecurityDescriptor_Proc s_pfn_Convert_SDDL_To_SD
= NULL
;
1300 if (is_windows_9x () == TRUE
)
1306 if (g_b_init_convert_sddl_to_sd
== 0)
1308 g_b_init_convert_sddl_to_sd
= 1;
1310 s_pfn_Convert_SDDL_To_SD
=
1311 (ConvertStringSecurityDescriptorToSecurityDescriptor_Proc
)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1312 "ConvertStringSecurityDescriptorToSecurityDescriptorW");
1314 s_pfn_Convert_SDDL_To_SD
=
1315 (ConvertStringSecurityDescriptorToSecurityDescriptor_Proc
)GetProcAddress (GetModuleHandle ("Advapi32.dll"),
1316 "ConvertStringSecurityDescriptorToSecurityDescriptorA");
1319 if (s_pfn_Convert_SDDL_To_SD
== NULL
)
1325 retval
= s_pfn_Convert_SDDL_To_SD (StringSecurityDescriptor
,
1328 SecurityDescriptorSize
);
1334 get_adapters_info (PIP_ADAPTER_INFO pAdapterInfo
, PULONG pOutBufLen
)
1336 static GetAdaptersInfo_Proc s_pfn_Get_Adapters_Info
= NULL
;
1337 HMODULE hm_iphlpapi
= NULL
;
1339 if (is_windows_9x () == TRUE
)
1340 return ERROR_NOT_SUPPORTED
;
1342 if (g_b_init_get_adapters_info
== 0)
1344 g_b_init_get_adapters_info
= 1;
1345 hm_iphlpapi
= LoadLibrary ("Iphlpapi.dll");
1347 s_pfn_Get_Adapters_Info
= (GetAdaptersInfo_Proc
)
1348 GetProcAddress (hm_iphlpapi
, "GetAdaptersInfo");
1350 if (s_pfn_Get_Adapters_Info
== NULL
)
1351 return ERROR_NOT_SUPPORTED
;
1352 return s_pfn_Get_Adapters_Info (pAdapterInfo
, pOutBufLen
);
1357 /* Return 1 if P is a valid pointer to an object of size SIZE. Return
1358 0 if P is NOT a valid pointer. Return -1 if we cannot validate P.
1360 This is called from alloc.c:valid_pointer_p. */
1362 w32_valid_pointer_p (void *p
, int size
)
1365 HANDLE h
= OpenProcess (PROCESS_VM_READ
, FALSE
, GetCurrentProcessId ());
1369 unsigned char *buf
= alloca (size
);
1370 int retval
= ReadProcessMemory (h
, p
, buf
, size
, &done
);
1381 /* Here's an overview of how the Windows build supports file names
1382 that cannot be encoded by the current system codepage.
1384 From the POV of Lisp and layers of C code above the functions here,
1385 Emacs on Windows pretends that its file names are encoded in UTF-8;
1386 see encode_file and decode_file on coding.c. Any file name that is
1387 passed as a unibyte string to C functions defined here is assumed
1388 to be in UTF-8 encoding. Any file name returned by functions
1389 defined here must be in UTF-8 encoding, with only a few exceptions
1390 reserved for a couple of special cases. (Be sure to use
1391 MAX_UTF8_PATH for char arrays that store UTF-8 encoded file names,
1392 as they can be much longer than MAX_PATH!)
1394 The UTF-8 encoded file names cannot be passed to system APIs, as
1395 Windows does not support that. Therefore, they are converted
1396 either to UTF-16 or to the ANSI codepage, depending on the value of
1397 w32-unicode-filenames, before calling any system APIs or CRT library
1398 functions. The default value of that variable is determined by the
1399 OS on which Emacs runs: nil on Windows 9X and t otherwise, but the
1400 user can change that default (although I don't see why would she
1403 The 4 functions defined below, filename_to_utf16, filename_to_ansi,
1404 filename_from_utf16, and filename_from_ansi, are the workhorses of
1405 these conversions. They rely on Windows native APIs
1406 MultiByteToWideChar and WideCharToMultiByte; we cannot use
1407 functions from coding.c here, because they allocate memory, which
1408 is a bad idea on the level of libc, which is what the functions
1409 here emulate. (If you worry about performance due to constant
1410 conversion back and forth from UTF-8 to UTF-16, then don't: first,
1411 it was measured to take only a few microseconds on a not-so-fast
1412 machine, and second, that's exactly what the ANSI APIs we used
1413 before did anyway, because they are just thin wrappers around the
1416 The variables file-name-coding-system and default-file-name-coding-system
1417 still exist, but are actually used only when a file name needs to
1418 be converted to the ANSI codepage. This happens all the time when
1419 w32-unicode-filenames is nil, but can also happen from time to time
1420 when it is t. Otherwise, these variables have no effect on file-name
1421 encoding when w32-unicode-filenames is t; this is similar to
1422 selection-coding-system.
1424 This arrangement works very well, but it has a few gotchas and
1427 . Lisp code that encodes or decodes file names manually should
1428 normally use 'utf-8' as the coding-system on Windows,
1429 disregarding file-name-coding-system. This is a somewhat
1430 unpleasant consequence, but it cannot be avoided. Fortunately,
1431 very few Lisp packages need to do that.
1433 More generally, passing to library functions (e.g., fopen or
1434 opendir) file names already encoded in the ANSI codepage is
1435 explicitly *verboten*, as all those functions, as shadowed and
1436 emulated here, assume they will receive UTF-8 encoded file names.
1438 For the same reasons, no CRT function or Win32 API can be called
1439 directly in Emacs sources, without either converting the file
1440 names from UTF-8 to UTF-16 or ANSI codepage, or going through
1441 some shadowing function defined here.
1443 . Environment variables stored in Vprocess_environment are encoded
1444 in the ANSI codepage, so if getenv/egetenv is used for a variable
1445 whose value is a file name or a list of directories, it needs to
1446 be converted to UTF-8, before it is used as argument to functions
1447 or decoded into a Lisp string.
1449 . File names passed to external libraries, like the image libraries
1450 and GnuTLS, need special handling. These libraries generally
1451 don't support UTF-16 or UTF-8 file names, so they must get file
1452 names encoded in the ANSI codepage. To facilitate using these
1453 libraries with file names that are not encodable in the ANSI
1454 codepage, use the function ansi_encode_filename, which will try
1455 to use the short 8+3 alias of a file name if that file name is
1456 not encodable in the ANSI codepage. See image.c and gnutls.c for
1457 examples of how this should be done.
1459 . Running subprocesses in non-ASCII directories and with non-ASCII
1460 file arguments is limited to the current codepage (even though
1461 Emacs is perfectly capable of finding an executable program file
1462 in a directory whose name cannot be encoded in the current
1463 codepage). This is because the command-line arguments are
1464 encoded _before_ they get to the w32-specific level, and the
1465 encoding is not known in advance (it doesn't have to be the
1466 current ANSI codepage), so w32proc.c functions cannot re-encode
1467 them in UTF-16. This should be fixed, but will also require
1468 changes in cmdproxy. The current limitation is not terribly bad
1469 anyway, since very few, if any, Windows console programs that are
1470 likely to be invoked by Emacs support UTF-16 encoded command
1473 . For similar reasons, server.el and emacsclient are also limited
1474 to the current ANSI codepage for now.
1476 . Emacs itself can only handle command-line arguments encoded in
1477 the current codepage.
1479 . Turning on w32-unicode-filename on Windows 9X (if it at all
1480 works) requires UNICOWS.DLL, which is thus a requirement even in
1481 non-GUI sessions, something the we previously avoided. */
1485 /* Converting file names from UTF-8 to either UTF-16 or the ANSI
1486 codepage defined by file-name-coding-system. */
1488 /* Current codepage for encoding file names. */
1489 static int file_name_codepage
;
1491 /* Produce a Windows ANSI codepage suitable for encoding file names.
1492 Return the information about that codepage in CP_INFO. */
1494 codepage_for_filenames (CPINFO
*cp_info
)
1496 /* A simple cache to avoid calling GetCPInfo every time we need to
1497 encode/decode a file name. The file-name encoding is not
1498 supposed to be changed too frequently, if ever. */
1499 static Lisp_Object last_file_name_encoding
;
1501 Lisp_Object current_encoding
;
1503 current_encoding
= Vfile_name_coding_system
;
1504 if (NILP (current_encoding
))
1505 current_encoding
= Vdefault_file_name_coding_system
;
1507 if (!EQ (last_file_name_encoding
, current_encoding
))
1509 /* Default to the current ANSI codepage. */
1510 file_name_codepage
= w32_ansi_code_page
;
1512 if (NILP (current_encoding
))
1514 char *cpname
= SDATA (SYMBOL_NAME (current_encoding
));
1515 char *cp
= NULL
, *end
;
1518 if (strncmp (cpname
, "cp", 2) == 0)
1520 else if (strncmp (cpname
, "windows-", 8) == 0)
1526 cpnum
= strtol (cp
, &end
, 10);
1527 if (cpnum
&& *end
== '\0' && end
- cp
>= 2)
1528 file_name_codepage
= cpnum
;
1532 if (!file_name_codepage
)
1533 file_name_codepage
= CP_ACP
; /* CP_ACP = 0, but let's not assume that */
1535 if (!GetCPInfo (file_name_codepage
, &cp
))
1537 file_name_codepage
= CP_ACP
;
1538 if (!GetCPInfo (file_name_codepage
, &cp
))
1545 return file_name_codepage
;
1549 filename_to_utf16 (const char *fn_in
, wchar_t *fn_out
)
1551 int result
= pMultiByteToWideChar (CP_UTF8
, MB_ERR_INVALID_CHARS
, fn_in
, -1,
1556 DWORD err
= GetLastError ();
1560 case ERROR_INVALID_FLAGS
:
1561 case ERROR_INVALID_PARAMETER
:
1564 case ERROR_INSUFFICIENT_BUFFER
:
1565 case ERROR_NO_UNICODE_TRANSLATION
:
1576 filename_from_utf16 (const wchar_t *fn_in
, char *fn_out
)
1578 int result
= pWideCharToMultiByte (CP_UTF8
, 0, fn_in
, -1,
1579 fn_out
, MAX_UTF8_PATH
, NULL
, NULL
);
1583 DWORD err
= GetLastError ();
1587 case ERROR_INVALID_FLAGS
:
1588 case ERROR_INVALID_PARAMETER
:
1591 case ERROR_INSUFFICIENT_BUFFER
:
1592 case ERROR_NO_UNICODE_TRANSLATION
:
1603 filename_to_ansi (const char *fn_in
, char *fn_out
)
1605 wchar_t fn_utf16
[MAX_PATH
];
1607 if (filename_to_utf16 (fn_in
, fn_utf16
) == 0)
1610 int codepage
= codepage_for_filenames (NULL
);
1612 result
= pWideCharToMultiByte (codepage
, 0, fn_utf16
, -1,
1613 fn_out
, MAX_PATH
, NULL
, NULL
);
1616 DWORD err
= GetLastError ();
1620 case ERROR_INVALID_FLAGS
:
1621 case ERROR_INVALID_PARAMETER
:
1624 case ERROR_INSUFFICIENT_BUFFER
:
1625 case ERROR_NO_UNICODE_TRANSLATION
:
1638 filename_from_ansi (const char *fn_in
, char *fn_out
)
1640 wchar_t fn_utf16
[MAX_PATH
];
1641 int codepage
= codepage_for_filenames (NULL
);
1642 int result
= pMultiByteToWideChar (codepage
, MB_ERR_INVALID_CHARS
, fn_in
, -1,
1643 fn_utf16
, MAX_PATH
);
1647 DWORD err
= GetLastError ();
1651 case ERROR_INVALID_FLAGS
:
1652 case ERROR_INVALID_PARAMETER
:
1655 case ERROR_INSUFFICIENT_BUFFER
:
1656 case ERROR_NO_UNICODE_TRANSLATION
:
1663 return filename_from_utf16 (fn_utf16
, fn_out
);
1668 /* The directory where we started, in UTF-8. */
1669 static char startup_dir
[MAX_UTF8_PATH
];
1671 /* Get the current working directory. */
1673 getcwd (char *dir
, int dirsize
)
1680 if (dirsize
<= strlen (startup_dir
))
1686 if (GetCurrentDirectory (MAXPATHLEN
, dir
) > 0)
1690 /* Emacs doesn't actually change directory itself, it stays in the
1691 same directory where it was started. */
1692 strcpy (dir
, startup_dir
);
1697 /* Emulate getloadavg. */
1699 struct load_sample
{
1706 /* Number of processors on this machine. */
1707 static unsigned num_of_processors
;
1709 /* We maintain 1-sec samples for the last 16 minutes in a circular buffer. */
1710 static struct load_sample samples
[16*60];
1711 static int first_idx
= -1, last_idx
= -1;
1712 static int max_idx
= ARRAYELTS (samples
);
1717 int next_idx
= from
+ 1;
1719 if (next_idx
>= max_idx
)
1728 int prev_idx
= from
- 1;
1731 prev_idx
= max_idx
- 1;
1737 sample_system_load (ULONGLONG
*idle
, ULONGLONG
*kernel
, ULONGLONG
*user
)
1739 SYSTEM_INFO sysinfo
;
1740 FILETIME ft_idle
, ft_user
, ft_kernel
;
1742 /* Initialize the number of processors on this machine. */
1743 if (num_of_processors
<= 0)
1745 get_native_system_info (&sysinfo
);
1746 num_of_processors
= sysinfo
.dwNumberOfProcessors
;
1747 if (num_of_processors
<= 0)
1749 GetSystemInfo (&sysinfo
);
1750 num_of_processors
= sysinfo
.dwNumberOfProcessors
;
1752 if (num_of_processors
<= 0)
1753 num_of_processors
= 1;
1756 /* TODO: Take into account threads that are ready to run, by
1757 sampling the "\System\Processor Queue Length" performance
1758 counter. The code below accounts only for threads that are
1759 actually running. */
1761 if (get_system_times (&ft_idle
, &ft_kernel
, &ft_user
))
1763 ULARGE_INTEGER uidle
, ukernel
, uuser
;
1765 memcpy (&uidle
, &ft_idle
, sizeof (ft_idle
));
1766 memcpy (&ukernel
, &ft_kernel
, sizeof (ft_kernel
));
1767 memcpy (&uuser
, &ft_user
, sizeof (ft_user
));
1768 *idle
= uidle
.QuadPart
;
1769 *kernel
= ukernel
.QuadPart
;
1770 *user
= uuser
.QuadPart
;
1780 /* Produce the load average for a given time interval, using the
1781 samples in the samples[] array. WHICH can be 0, 1, or 2, meaning
1782 1-minute, 5-minute, or 15-minute average, respectively. */
1786 double retval
= -1.0;
1789 double span
= (which
== 0 ? 1.0 : (which
== 1 ? 5.0 : 15.0)) * 60;
1790 time_t now
= samples
[last_idx
].sample_time
;
1792 if (first_idx
!= last_idx
)
1794 for (idx
= buf_prev (last_idx
); ; idx
= buf_prev (idx
))
1796 tdiff
= difftime (now
, samples
[idx
].sample_time
);
1797 if (tdiff
>= span
- 2*DBL_EPSILON
*now
)
1800 samples
[last_idx
].kernel
+ samples
[last_idx
].user
1801 - (samples
[idx
].kernel
+ samples
[idx
].user
);
1802 long double idl
= samples
[last_idx
].idle
- samples
[idx
].idle
;
1804 retval
= (1.0 - idl
/ sys
) * num_of_processors
;
1807 if (idx
== first_idx
)
1816 getloadavg (double loadavg
[], int nelem
)
1819 ULONGLONG idle
, kernel
, user
;
1820 time_t now
= time (NULL
);
1822 /* If system time jumped back for some reason, delete all samples
1823 whose time is later than the current wall-clock time. This
1824 prevents load average figures from becoming frozen for prolonged
1825 periods of time, when system time is reset backwards. */
1828 while (difftime (now
, samples
[last_idx
].sample_time
) < -1.0)
1830 if (last_idx
== first_idx
)
1832 first_idx
= last_idx
= -1;
1835 last_idx
= buf_prev (last_idx
);
1839 /* Store another sample. We ignore samples that are less than 1 sec
1842 || (difftime (now
, samples
[last_idx
].sample_time
)
1843 >= 1.0 - 2*DBL_EPSILON
*now
))
1845 sample_system_load (&idle
, &kernel
, &user
);
1846 last_idx
= buf_next (last_idx
);
1847 samples
[last_idx
].sample_time
= now
;
1848 samples
[last_idx
].idle
= idle
;
1849 samples
[last_idx
].kernel
= kernel
;
1850 samples
[last_idx
].user
= user
;
1851 /* If the buffer has more that 15 min worth of samples, discard
1853 if (first_idx
== -1)
1854 first_idx
= last_idx
;
1855 while (first_idx
!= last_idx
1856 && (difftime (now
, samples
[first_idx
].sample_time
)
1857 >= 15.0*60 + 2*DBL_EPSILON
*now
))
1858 first_idx
= buf_next (first_idx
);
1861 for (elem
= 0; elem
< nelem
; elem
++)
1863 double avg
= getavg (elem
);
1867 loadavg
[elem
] = avg
;
1873 /* Emulate getpwuid, getpwnam and others. */
1875 #define PASSWD_FIELD_SIZE 256
1877 static char dflt_passwd_name
[PASSWD_FIELD_SIZE
];
1878 static char dflt_passwd_passwd
[PASSWD_FIELD_SIZE
];
1879 static char dflt_passwd_gecos
[PASSWD_FIELD_SIZE
];
1880 static char dflt_passwd_dir
[MAX_UTF8_PATH
];
1881 static char dflt_passwd_shell
[MAX_UTF8_PATH
];
1883 static struct passwd dflt_passwd
=
1895 static char dflt_group_name
[GNLEN
+1];
1897 static struct group dflt_group
=
1899 /* When group information is not available, we return this as the
1900 group for all files. */
1908 return dflt_passwd
.pw_uid
;
1914 /* I could imagine arguing for checking to see whether the user is
1915 in the Administrators group and returning a UID of 0 for that
1916 case, but I don't know how wise that would be in the long run. */
1923 return dflt_passwd
.pw_gid
;
1933 getpwuid (unsigned uid
)
1935 if (uid
== dflt_passwd
.pw_uid
)
1936 return &dflt_passwd
;
1941 getgrgid (gid_t gid
)
1947 getpwnam (char *name
)
1951 pw
= getpwuid (getuid ());
1955 if (xstrcasecmp (name
, pw
->pw_name
))
1962 init_user_info (void)
1964 /* Find the user's real name by opening the process token and
1965 looking up the name associated with the user-sid in that token.
1967 Use the relative portion of the identifier authority value from
1968 the user-sid as the user id value (same for group id using the
1969 primary group sid from the process token). */
1971 char uname
[UNLEN
+1], gname
[GNLEN
+1], domain
[1025];
1972 DWORD ulength
= sizeof (uname
), dlength
= sizeof (domain
), needed
;
1973 DWORD glength
= sizeof (gname
);
1974 HANDLE token
= NULL
;
1975 SID_NAME_USE user_type
;
1976 unsigned char *buf
= NULL
;
1978 TOKEN_USER user_token
;
1979 TOKEN_PRIMARY_GROUP group_token
;
1982 result
= open_process_token (GetCurrentProcess (), TOKEN_QUERY
, &token
);
1985 result
= get_token_information (token
, TokenUser
, NULL
, 0, &blen
);
1986 if (!result
&& GetLastError () == ERROR_INSUFFICIENT_BUFFER
)
1988 buf
= xmalloc (blen
);
1989 result
= get_token_information (token
, TokenUser
,
1990 (LPVOID
)buf
, blen
, &needed
);
1993 memcpy (&user_token
, buf
, sizeof (user_token
));
1994 result
= lookup_account_sid (NULL
, user_token
.User
.Sid
,
1996 domain
, &dlength
, &user_type
);
2004 strcpy (dflt_passwd
.pw_name
, uname
);
2005 /* Determine a reasonable uid value. */
2006 if (xstrcasecmp ("administrator", uname
) == 0)
2008 dflt_passwd
.pw_uid
= 500; /* well-known Administrator uid */
2009 dflt_passwd
.pw_gid
= 513; /* well-known None gid */
2013 /* Use the last sub-authority value of the RID, the relative
2014 portion of the SID, as user/group ID. */
2015 dflt_passwd
.pw_uid
= get_rid (user_token
.User
.Sid
);
2017 /* Get group id and name. */
2018 result
= get_token_information (token
, TokenPrimaryGroup
,
2019 (LPVOID
)buf
, blen
, &needed
);
2020 if (!result
&& GetLastError () == ERROR_INSUFFICIENT_BUFFER
)
2022 buf
= xrealloc (buf
, blen
= needed
);
2023 result
= get_token_information (token
, TokenPrimaryGroup
,
2024 (LPVOID
)buf
, blen
, &needed
);
2028 memcpy (&group_token
, buf
, sizeof (group_token
));
2029 dflt_passwd
.pw_gid
= get_rid (group_token
.PrimaryGroup
);
2030 dlength
= sizeof (domain
);
2031 /* If we can get at the real Primary Group name, use that.
2032 Otherwise, the default group name was already set to
2033 "None" in globals_of_w32. */
2034 if (lookup_account_sid (NULL
, group_token
.PrimaryGroup
,
2035 gname
, &glength
, NULL
, &dlength
,
2037 strcpy (dflt_group_name
, gname
);
2040 dflt_passwd
.pw_gid
= dflt_passwd
.pw_uid
;
2043 /* If security calls are not supported (presumably because we
2044 are running under Windows 9X), fallback to this: */
2045 else if (GetUserName (uname
, &ulength
))
2047 strcpy (dflt_passwd
.pw_name
, uname
);
2048 if (xstrcasecmp ("administrator", uname
) == 0)
2049 dflt_passwd
.pw_uid
= 0;
2051 dflt_passwd
.pw_uid
= 123;
2052 dflt_passwd
.pw_gid
= dflt_passwd
.pw_uid
;
2056 strcpy (dflt_passwd
.pw_name
, "unknown");
2057 dflt_passwd
.pw_uid
= 123;
2058 dflt_passwd
.pw_gid
= 123;
2060 dflt_group
.gr_gid
= dflt_passwd
.pw_gid
;
2062 /* Set dir and shell from environment variables. */
2063 if (w32_unicode_filenames
)
2065 wchar_t *home
= _wgetenv (L
"HOME");
2066 wchar_t *shell
= _wgetenv (L
"SHELL");
2068 /* Ensure HOME and SHELL are defined. */
2073 filename_from_utf16 (home
, dflt_passwd
.pw_dir
);
2074 filename_from_utf16 (shell
, dflt_passwd
.pw_shell
);
2078 char *home
= getenv ("HOME");
2079 char *shell
= getenv ("SHELL");
2085 filename_from_ansi (home
, dflt_passwd
.pw_dir
);
2086 filename_from_ansi (shell
, dflt_passwd
.pw_shell
);
2091 CloseHandle (token
);
2097 /* rand () on NT gives us 15 random bits...hack together 30 bits. */
2098 return ((rand () << 15) | rand ());
2107 /* Return the maximum length in bytes of a multibyte character
2108 sequence encoded in the current ANSI codepage. This is required to
2109 correctly walk the encoded file names one character at a time. */
2111 max_filename_mbslen (void)
2115 codepage_for_filenames (&cp_info
);
2116 return cp_info
.MaxCharSize
;
2119 /* Normalize filename by converting in-place all of its path
2120 separators to the separator specified by PATH_SEP. */
2123 normalize_filename (register char *fp
, char path_sep
)
2127 /* Always lower-case drive letters a-z, even if the filesystem
2128 preserves case in filenames.
2129 This is so filenames can be compared by string comparison
2130 functions that are case-sensitive. Even case-preserving filesystems
2131 do not distinguish case in drive letters. */
2134 if (*p2
== ':' && *fp
>= 'A' && *fp
<= 'Z')
2142 if ((*fp
== '/' || *fp
== '\\') && *fp
!= path_sep
)
2148 /* Destructively turn backslashes into slashes. */
2150 dostounix_filename (register char *p
)
2152 normalize_filename (p
, '/');
2155 /* Destructively turn slashes into backslashes. */
2157 unixtodos_filename (register char *p
)
2159 normalize_filename (p
, '\\');
2162 /* Remove all CR's that are followed by a LF.
2163 (From msdos.c...probably should figure out a way to share it,
2164 although this code isn't going to ever change.) */
2166 crlf_to_lf (register int n
, register unsigned char *buf
)
2168 unsigned char *np
= buf
;
2169 unsigned char *startp
= buf
;
2170 unsigned char *endp
= buf
+ n
;
2174 while (buf
< endp
- 1)
2178 if (*(++buf
) != 0x0a)
2189 /* Parse the root part of file name, if present. Return length and
2190 optionally store pointer to char after root. */
2192 parse_root (const char * name
, const char ** pPath
)
2194 const char * start
= name
;
2199 /* find the root name of the volume if given */
2200 if (isalpha (name
[0]) && name
[1] == ':')
2202 /* skip past drive specifier */
2204 if (IS_DIRECTORY_SEP (name
[0]))
2207 else if (IS_DIRECTORY_SEP (name
[0]) && IS_DIRECTORY_SEP (name
[1]))
2214 if (IS_DIRECTORY_SEP (*name
) && --slashes
== 0)
2219 if (IS_DIRECTORY_SEP (name
[0]))
2226 return name
- start
;
2229 /* Get long base name for name; name is assumed to be absolute. */
2231 get_long_basename (char * name
, char * buf
, int size
)
2233 HANDLE dir_handle
= INVALID_HANDLE_VALUE
;
2234 char fname_utf8
[MAX_UTF8_PATH
];
2238 /* Must be valid filename, no wild cards or other invalid characters. */
2239 if (strpbrk (name
, "*?|<>\""))
2242 if (w32_unicode_filenames
)
2244 wchar_t fname_utf16
[MAX_PATH
];
2245 WIN32_FIND_DATAW find_data_wide
;
2247 filename_to_utf16 (name
, fname_utf16
);
2248 dir_handle
= FindFirstFileW (fname_utf16
, &find_data_wide
);
2249 if (dir_handle
!= INVALID_HANDLE_VALUE
)
2250 cstatus
= filename_from_utf16 (find_data_wide
.cFileName
, fname_utf8
);
2254 char fname_ansi
[MAX_PATH
];
2255 WIN32_FIND_DATAA find_data_ansi
;
2257 filename_to_ansi (name
, fname_ansi
);
2258 /* If the ANSI name includes ? characters, it is not encodable
2259 in the ANSI codepage. In that case, we deliver the question
2260 marks to the caller; calling FindFirstFileA in this case
2261 could return some unrelated file name in the same
2263 if (_mbspbrk (fname_ansi
, "?"))
2265 /* Find the basename of fname_ansi. */
2266 char *p
= strrchr (fname_ansi
, '\\');
2272 cstatus
= filename_from_ansi (p
, fname_utf8
);
2276 dir_handle
= FindFirstFileA (fname_ansi
, &find_data_ansi
);
2277 if (dir_handle
!= INVALID_HANDLE_VALUE
)
2278 cstatus
= filename_from_ansi (find_data_ansi
.cFileName
, fname_utf8
);
2282 if (cstatus
== 0 && (len
= strlen (fname_utf8
)) < size
)
2283 memcpy (buf
, fname_utf8
, len
+ 1);
2287 if (dir_handle
!= INVALID_HANDLE_VALUE
)
2288 FindClose (dir_handle
);
2293 /* Get long name for file, if possible (assumed to be absolute). */
2295 w32_get_long_filename (const char * name
, char * buf
, int size
)
2300 char full
[ MAX_UTF8_PATH
];
2303 len
= strlen (name
);
2304 if (len
>= MAX_UTF8_PATH
)
2307 /* Use local copy for destructive modification. */
2308 memcpy (full
, name
, len
+1);
2309 unixtodos_filename (full
);
2311 /* Copy root part verbatim. */
2312 len
= parse_root (full
, (const char **)&p
);
2313 memcpy (o
, full
, len
);
2318 while (p
!= NULL
&& *p
)
2321 p
= strchr (q
, '\\');
2323 len
= get_long_basename (full
, o
, size
);
2346 w32_get_short_filename (const char * name
, char * buf
, int size
)
2348 if (w32_unicode_filenames
)
2350 wchar_t name_utf16
[MAX_PATH
], short_name
[MAX_PATH
];
2351 unsigned int retval
;
2353 filename_to_utf16 (name
, name_utf16
);
2354 retval
= GetShortPathNameW (name_utf16
, short_name
, size
);
2355 if (retval
&& retval
< size
)
2356 filename_from_utf16 (short_name
, buf
);
2361 char name_ansi
[MAX_PATH
];
2363 filename_to_ansi (name
, name_ansi
);
2364 return GetShortPathNameA (name_ansi
, buf
, size
);
2368 /* Re-encode FILENAME, a UTF-8 encoded unibyte string, using the
2369 MS-Windows ANSI codepage. If FILENAME includes characters not
2370 supported by the ANSI codepage, return the 8+3 alias of FILENAME,
2371 if it exists. This is needed because the w32 build wants to
2372 support file names outside of the system locale, but image
2373 libraries typically don't support wide (a.k.a. "Unicode") APIs
2374 required for that. */
2377 ansi_encode_filename (Lisp_Object filename
)
2379 Lisp_Object encoded_filename
;
2380 char fname
[MAX_PATH
];
2382 filename_to_ansi (SSDATA (filename
), fname
);
2383 if (_mbspbrk (fname
, "?"))
2385 char shortname
[MAX_PATH
];
2387 if (w32_get_short_filename (SDATA (filename
), shortname
, MAX_PATH
))
2389 dostounix_filename (shortname
);
2390 encoded_filename
= build_string (shortname
);
2393 encoded_filename
= build_unibyte_string (fname
);
2396 encoded_filename
= build_unibyte_string (fname
);
2397 return encoded_filename
;
2401 is_unc_volume (const char *filename
)
2403 const char *ptr
= filename
;
2405 if (!IS_DIRECTORY_SEP (ptr
[0]) || !IS_DIRECTORY_SEP (ptr
[1]) || !ptr
[2])
2408 if (strpbrk (ptr
+ 2, "*?|<>\"\\/"))
2414 /* Emulate the Posix unsetenv. */
2416 unsetenv (const char *name
)
2421 if (name
== NULL
|| *name
== '\0' || strchr (name
, '=') != NULL
)
2426 name_len
= strlen (name
);
2427 /* MS docs says an environment variable cannot be longer than 32K. */
2428 if (name_len
> 32767)
2433 /* It is safe to use 'alloca' with 32K size, since the stack is at
2434 least 2MB, and we set it to 8MB in the link command line. */
2435 var
= alloca (name_len
+ 2);
2436 strncpy (var
, name
, name_len
);
2437 var
[name_len
++] = '=';
2438 var
[name_len
] = '\0';
2439 return _putenv (var
);
2442 /* MS _putenv doesn't support removing a variable when the argument
2443 does not include the '=' character, so we fix that here. */
2445 sys_putenv (char *str
)
2447 const char *const name_end
= strchr (str
, '=');
2449 if (name_end
== NULL
)
2451 /* Remove the variable from the environment. */
2452 return unsetenv (str
);
2455 return _putenv (str
);
2458 #define REG_ROOT "SOFTWARE\\GNU\\Emacs"
2461 w32_get_resource (char *key
, LPDWORD lpdwtype
)
2464 HKEY hrootkey
= NULL
;
2467 /* Check both the current user and the local machine to see if
2468 we have any resources. */
2470 if (RegOpenKeyEx (HKEY_CURRENT_USER
, REG_ROOT
, 0, KEY_READ
, &hrootkey
) == ERROR_SUCCESS
)
2474 if (RegQueryValueEx (hrootkey
, key
, NULL
, NULL
, NULL
, &cbData
) == ERROR_SUCCESS
2475 && (lpvalue
= xmalloc (cbData
)) != NULL
2476 && RegQueryValueEx (hrootkey
, key
, NULL
, lpdwtype
, lpvalue
, &cbData
) == ERROR_SUCCESS
)
2478 RegCloseKey (hrootkey
);
2484 RegCloseKey (hrootkey
);
2487 if (RegOpenKeyEx (HKEY_LOCAL_MACHINE
, REG_ROOT
, 0, KEY_READ
, &hrootkey
) == ERROR_SUCCESS
)
2491 if (RegQueryValueEx (hrootkey
, key
, NULL
, NULL
, NULL
, &cbData
) == ERROR_SUCCESS
2492 && (lpvalue
= xmalloc (cbData
)) != NULL
2493 && RegQueryValueEx (hrootkey
, key
, NULL
, lpdwtype
, lpvalue
, &cbData
) == ERROR_SUCCESS
)
2495 RegCloseKey (hrootkey
);
2501 RegCloseKey (hrootkey
);
2507 /* The argv[] array holds ANSI-encoded strings, and so this function
2508 works with ANS_encoded strings. */
2510 init_environment (char ** argv
)
2512 static const char * const tempdirs
[] = {
2513 "$TMPDIR", "$TEMP", "$TMP", "c:/"
2518 const int imax
= ARRAYELTS (tempdirs
);
2520 /* Implementation note: This function explicitly works with ANSI
2521 file names, not with UTF-8 encoded file names. This is because
2522 this function pushes variables into the Emacs's environment, and
2523 the environment variables are always assumed to be in the
2524 locale-specific encoding. Do NOT call any functions that accept
2525 UTF-8 file names from this function! */
2527 /* Make sure they have a usable $TMPDIR. Many Emacs functions use
2528 temporary files and assume "/tmp" if $TMPDIR is unset, which
2529 will break on DOS/Windows. Refuse to work if we cannot find
2530 a directory, not even "c:/", usable for that purpose. */
2531 for (i
= 0; i
< imax
; i
++)
2533 const char *tmp
= tempdirs
[i
];
2536 tmp
= getenv (tmp
+ 1);
2537 /* Note that `access' can lie to us if the directory resides on a
2538 read-only filesystem, like CD-ROM or a write-protected floppy.
2539 The only way to be really sure is to actually create a file and
2540 see if it succeeds. But I think that's too much to ask. */
2542 /* MSVCRT's _access crashes with D_OK, so we use our replacement. */
2543 if (tmp
&& sys_access (tmp
, D_OK
) == 0)
2545 char * var
= alloca (strlen (tmp
) + 8);
2546 sprintf (var
, "TMPDIR=%s", tmp
);
2547 _putenv (strdup (var
));
2554 Fcons (build_string ("no usable temporary directories found!!"),
2556 "While setting TMPDIR: ");
2558 /* Check for environment variables and use registry settings if they
2559 don't exist. Fallback on default values where applicable. */
2564 char locale_name
[32];
2565 char default_home
[MAX_PATH
];
2568 static const struct env_entry
2574 /* If the default value is NULL, we will use the value from the
2575 outside environment or the Registry, but will not push the
2576 variable into the Emacs environment if it is defined neither
2577 in the Registry nor in the outside environment. */
2579 {"PRELOAD_WINSOCK", NULL
},
2580 {"emacs_dir", "C:/emacs"},
2581 {"EMACSLOADPATH", NULL
},
2582 {"SHELL", "cmdproxy.exe"}, /* perhaps it is somewhere on PATH */
2583 {"EMACSDATA", NULL
},
2584 {"EMACSPATH", NULL
},
2591 #define N_ENV_VARS ARRAYELTS (dflt_envvars)
2593 /* We need to copy dflt_envvars[] and work on the copy because we
2594 don't want the dumped Emacs to inherit the values of
2595 environment variables we saw during dumping (which could be on
2596 a different system). The defaults above must be left intact. */
2597 struct env_entry env_vars
[N_ENV_VARS
];
2599 for (i
= 0; i
< N_ENV_VARS
; i
++)
2600 env_vars
[i
] = dflt_envvars
[i
];
2602 /* For backwards compatibility, check if a .emacs file exists in C:/
2603 If not, then we can try to default to the appdata directory under the
2604 user's profile, which is more likely to be writable. */
2605 if (sys_access ("C:/.emacs", F_OK
) != 0)
2607 HRESULT profile_result
;
2608 /* Dynamically load ShGetFolderPath, as it won't exist on versions
2609 of Windows 95 and NT4 that have not been updated to include
2611 ShGetFolderPath_fn get_folder_path
;
2612 get_folder_path
= (ShGetFolderPath_fn
)
2613 GetProcAddress (GetModuleHandle ("shell32.dll"), "SHGetFolderPathA");
2615 if (get_folder_path
!= NULL
)
2617 profile_result
= get_folder_path (NULL
, CSIDL_APPDATA
, NULL
,
2620 /* If we can't get the appdata dir, revert to old behavior. */
2621 if (profile_result
== S_OK
)
2623 env_vars
[0].def_value
= default_home
;
2629 /* Get default locale info and use it for LANG. */
2630 if (GetLocaleInfo (LOCALE_USER_DEFAULT
,
2631 LOCALE_SABBREVLANGNAME
| LOCALE_USE_CP_ACP
,
2632 locale_name
, sizeof (locale_name
)))
2634 for (i
= 0; i
< N_ENV_VARS
; i
++)
2636 if (strcmp (env_vars
[i
].name
, "LANG") == 0)
2638 env_vars
[i
].def_value
= locale_name
;
2644 #define SET_ENV_BUF_SIZE (4 * MAX_PATH) /* to cover EMACSLOADPATH */
2646 /* Treat emacs_dir specially: set it unconditionally based on our
2650 char modname
[MAX_PATH
];
2652 if (!GetModuleFileNameA (NULL
, modname
, MAX_PATH
))
2654 if ((p
= _mbsrchr (modname
, '\\')) == NULL
)
2658 if ((p
= _mbsrchr (modname
, '\\'))
2659 /* From bin means installed Emacs, from src means uninstalled. */
2660 && (xstrcasecmp (p
, "\\bin") == 0 || xstrcasecmp (p
, "\\src") == 0))
2662 char buf
[SET_ENV_BUF_SIZE
];
2663 int within_build_tree
= xstrcasecmp (p
, "\\src") == 0;
2666 for (p
= modname
; *p
; p
= CharNext (p
))
2667 if (*p
== '\\') *p
= '/';
2669 _snprintf (buf
, sizeof (buf
)-1, "emacs_dir=%s", modname
);
2670 _putenv (strdup (buf
));
2671 /* If we are running from the Posix-like build tree, define
2672 SHELL to point to our own cmdproxy. The loop below will
2673 then disregard PATH_EXEC and the default value. */
2674 if (within_build_tree
)
2676 _snprintf (buf
, sizeof (buf
) - 1,
2677 "SHELL=%s/nt/cmdproxy.exe", modname
);
2678 _putenv (strdup (buf
));
2683 for (i
= 0; i
< N_ENV_VARS
; i
++)
2685 if (!getenv (env_vars
[i
].name
))
2688 char bufc
[SET_ENV_BUF_SIZE
];
2690 if ((lpval
= w32_get_resource (env_vars
[i
].name
, &dwType
)) == NULL
2691 /* Also ignore empty environment variables. */
2696 if (strcmp (env_vars
[i
].name
, "SHELL") == 0)
2698 /* Look for cmdproxy.exe in every directory in
2699 PATH_EXEC. FIXME: This does not find cmdproxy
2700 in nt/ when we run uninstalled. */
2701 char fname
[MAX_PATH
];
2702 const char *pstart
= PATH_EXEC
, *pend
;
2705 pend
= _mbschr (pstart
, ';');
2707 pend
= pstart
+ strlen (pstart
);
2708 /* Be defensive against series of ;;; characters. */
2711 strncpy (fname
, pstart
, pend
- pstart
);
2712 fname
[pend
- pstart
] = '/';
2713 strcpy (&fname
[pend
- pstart
+ 1], "cmdproxy.exe");
2714 ExpandEnvironmentStrings ((LPSTR
) fname
, bufc
,
2716 if (sys_access (bufc
, F_OK
) == 0)
2729 /* If not found in any directory, use the
2730 default as the last resort. */
2731 lpval
= env_vars
[i
].def_value
;
2732 dwType
= REG_EXPAND_SZ
;
2738 lpval
= env_vars
[i
].def_value
;
2739 dwType
= REG_EXPAND_SZ
;
2741 if (strcmp (env_vars
[i
].name
, "HOME") == 0 && !appdata
)
2742 Vdelayed_warnings_list
2743 = Fcons (listn (CONSTYPE_HEAP
, 2,
2744 intern ("initialization"),
2745 build_string ("Setting HOME to C:\\ by default is deprecated")),
2746 Vdelayed_warnings_list
);
2751 char buf1
[SET_ENV_BUF_SIZE
], buf2
[SET_ENV_BUF_SIZE
];
2753 if (dwType
== REG_EXPAND_SZ
)
2754 ExpandEnvironmentStrings ((LPSTR
) lpval
, buf1
, sizeof (buf1
));
2755 else if (dwType
== REG_SZ
)
2756 strcpy (buf1
, lpval
);
2757 if (dwType
== REG_EXPAND_SZ
|| dwType
== REG_SZ
)
2759 _snprintf (buf2
, sizeof (buf2
)-1, "%s=%s", env_vars
[i
].name
,
2761 _putenv (strdup (buf2
));
2771 /* Rebuild system configuration to reflect invoking system. */
2772 Vsystem_configuration
= build_string (EMACS_CONFIGURATION
);
2774 /* Another special case: on NT, the PATH variable is actually named
2775 "Path" although cmd.exe (perhaps NT itself) arranges for
2776 environment variable lookup and setting to be case insensitive.
2777 However, Emacs assumes a fully case sensitive environment, so we
2778 need to change "Path" to "PATH" to match the expectations of
2779 various elisp packages. We do this by the sneaky method of
2780 modifying the string in the C runtime environ entry.
2782 The same applies to COMSPEC. */
2786 for (envp
= environ
; *envp
; envp
++)
2787 if (_strnicmp (*envp
, "PATH=", 5) == 0)
2788 memcpy (*envp
, "PATH=", 5);
2789 else if (_strnicmp (*envp
, "COMSPEC=", 8) == 0)
2790 memcpy (*envp
, "COMSPEC=", 8);
2793 /* Remember the initial working directory for getcwd. */
2794 /* FIXME: Do we need to resolve possible symlinks in startup_dir?
2795 Does it matter anywhere in Emacs? */
2796 if (w32_unicode_filenames
)
2798 wchar_t wstartup_dir
[MAX_PATH
];
2800 if (!GetCurrentDirectoryW (MAX_PATH
, wstartup_dir
))
2802 filename_from_utf16 (wstartup_dir
, startup_dir
);
2806 char astartup_dir
[MAX_PATH
];
2808 if (!GetCurrentDirectoryA (MAX_PATH
, astartup_dir
))
2810 filename_from_ansi (astartup_dir
, startup_dir
);
2814 static char modname
[MAX_PATH
];
2816 if (!GetModuleFileNameA (NULL
, modname
, MAX_PATH
))
2821 /* Determine if there is a middle mouse button, to allow parse_button
2822 to decide whether right mouse events should be mouse-2 or
2824 w32_num_mouse_buttons
= GetSystemMetrics (SM_CMOUSEBUTTONS
);
2829 /* Called from expand-file-name when default-directory is not a string. */
2832 emacs_root_dir (void)
2834 static char root_dir
[MAX_UTF8_PATH
];
2837 p
= getenv ("emacs_dir");
2840 filename_from_ansi (p
, root_dir
);
2841 root_dir
[parse_root (root_dir
, NULL
)] = '\0';
2842 dostounix_filename (root_dir
);
2846 #include <sys/timeb.h>
2848 /* Emulate gettimeofday (Ulrich Leodolter, 1/11/95). */
2850 gettimeofday (struct timeval
*__restrict tv
, struct timezone
*__restrict tz
)
2855 tv
->tv_sec
= tb
.time
;
2856 tv
->tv_usec
= tb
.millitm
* 1000L;
2857 /* Implementation note: _ftime sometimes doesn't update the dstflag
2858 according to the new timezone when the system timezone is
2859 changed. We could fix that by using GetSystemTime and
2860 GetTimeZoneInformation, but that doesn't seem necessary, since
2861 Emacs always calls gettimeofday with the 2nd argument NULL (see
2862 current_emacs_time). */
2865 tz
->tz_minuteswest
= tb
.timezone
; /* minutes west of Greenwich */
2866 tz
->tz_dsttime
= tb
.dstflag
; /* type of dst correction */
2871 /* Emulate fdutimens. */
2873 /* Set the access and modification time stamps of FD (a.k.a. FILE) to be
2874 TIMESPEC[0] and TIMESPEC[1], respectively.
2875 FD must be either negative -- in which case it is ignored --
2876 or a file descriptor that is open on FILE.
2877 If FD is nonnegative, then FILE can be NULL, which means
2878 use just futimes instead of utimes.
2879 If TIMESPEC is null, FAIL.
2880 Return 0 on success, -1 (setting errno) on failure. */
2883 fdutimens (int fd
, char const *file
, struct timespec
const timespec
[2])
2890 if (fd
< 0 && !file
)
2895 /* _futime's prototype defines 2nd arg as having the type 'struct
2896 _utimbuf', while utime needs to accept 'struct utimbuf' for
2897 compatibility with Posix. So we need to use 2 different (but
2898 equivalent) types to avoid compiler warnings, sigh. */
2901 struct _utimbuf _ut
;
2903 _ut
.actime
= timespec
[0].tv_sec
;
2904 _ut
.modtime
= timespec
[1].tv_sec
;
2905 return _futime (fd
, &_ut
);
2911 ut
.actime
= timespec
[0].tv_sec
;
2912 ut
.modtime
= timespec
[1].tv_sec
;
2913 /* Call 'utime', which is implemented below, not the MS library
2914 function, which fails on directories. */
2915 return utime (file
, &ut
);
2920 /* ------------------------------------------------------------------------- */
2921 /* IO support and wrapper functions for the Windows API. */
2922 /* ------------------------------------------------------------------------- */
2924 /* Place a wrapper around the MSVC version of ctime. It returns NULL
2925 on network directories, so we handle that case here.
2926 (Ulrich Leodolter, 1/11/95). */
2928 sys_ctime (const time_t *t
)
2930 char *str
= (char *) ctime (t
);
2931 return (str
? str
: "Sun Jan 01 00:00:00 1970");
2934 /* Emulate sleep...we could have done this with a define, but that
2935 would necessitate including windows.h in the files that used it.
2936 This is much easier. */
2938 sys_sleep (int seconds
)
2940 Sleep (seconds
* 1000);
2943 /* Internal MSVC functions for low-level descriptor munging */
2944 extern int __cdecl
_set_osfhnd (int fd
, long h
);
2945 extern int __cdecl
_free_osfhnd (int fd
);
2947 /* parallel array of private info on file handles */
2948 filedesc fd_info
[ MAXDESC
];
2950 typedef struct volume_info_data
{
2951 struct volume_info_data
* next
;
2953 /* time when info was obtained */
2956 /* actual volume info */
2965 /* Global referenced by various functions. */
2966 static volume_info_data volume_info
;
2968 /* Vector to indicate which drives are local and fixed (for which cached
2969 data never expires). */
2970 static BOOL fixed_drives
[26];
2972 /* Consider cached volume information to be stale if older than 10s,
2973 at least for non-local drives. Info for fixed drives is never stale. */
2974 #define DRIVE_INDEX( c ) ( (c) <= 'Z' ? (c) - 'A' : (c) - 'a' )
2975 #define VOLINFO_STILL_VALID( root_dir, info ) \
2976 ( ( isalpha (root_dir[0]) && \
2977 fixed_drives[ DRIVE_INDEX (root_dir[0]) ] ) \
2978 || GetTickCount () - info->timestamp < 10000 )
2980 /* Cache support functions. */
2982 /* Simple linked list with linear search is sufficient. */
2983 static volume_info_data
*volume_cache
= NULL
;
2985 static volume_info_data
*
2986 lookup_volume_info (char * root_dir
)
2988 volume_info_data
* info
;
2990 for (info
= volume_cache
; info
; info
= info
->next
)
2991 if (xstrcasecmp (info
->root_dir
, root_dir
) == 0)
2997 add_volume_info (char * root_dir
, volume_info_data
* info
)
2999 info
->root_dir
= xstrdup (root_dir
);
3000 unixtodos_filename (info
->root_dir
);
3001 info
->next
= volume_cache
;
3002 volume_cache
= info
;
3006 /* Wrapper for GetVolumeInformation, which uses caching to avoid
3007 performance penalty (~2ms on 486 for local drives, 7.5ms for local
3008 cdrom drive, ~5-10ms or more for remote drives on LAN). */
3009 static volume_info_data
*
3010 GetCachedVolumeInformation (char * root_dir
)
3012 volume_info_data
* info
;
3013 char default_root
[ MAX_UTF8_PATH
];
3014 char name
[MAX_PATH
+1];
3015 char type
[MAX_PATH
+1];
3017 /* NULL for root_dir means use root from current directory. */
3018 if (root_dir
== NULL
)
3020 if (w32_unicode_filenames
)
3022 wchar_t curdirw
[MAX_PATH
];
3024 if (GetCurrentDirectoryW (MAX_PATH
, curdirw
) == 0)
3026 filename_from_utf16 (curdirw
, default_root
);
3030 char curdira
[MAX_PATH
];
3032 if (GetCurrentDirectoryA (MAX_PATH
, curdira
) == 0)
3034 filename_from_ansi (curdira
, default_root
);
3036 parse_root (default_root
, (const char **)&root_dir
);
3038 root_dir
= default_root
;
3041 /* Local fixed drives can be cached permanently. Removable drives
3042 cannot be cached permanently, since the volume name and serial
3043 number (if nothing else) can change. Remote drives should be
3044 treated as if they are removable, since there is no sure way to
3045 tell whether they are or not. Also, the UNC association of drive
3046 letters mapped to remote volumes can be changed at any time (even
3047 by other processes) without notice.
3049 As a compromise, so we can benefit from caching info for remote
3050 volumes, we use a simple expiry mechanism to invalidate cache
3051 entries that are more than ten seconds old. */
3054 /* No point doing this, because WNetGetConnection is even slower than
3055 GetVolumeInformation, consistently taking ~50ms on a 486 (FWIW,
3056 GetDriveType is about the only call of this type which does not
3057 involve network access, and so is extremely quick). */
3059 /* Map drive letter to UNC if remote. */
3060 if (isalpha (root_dir
[0]) && !fixed
[DRIVE_INDEX (root_dir
[0])])
3062 char remote_name
[ 256 ];
3063 char drive
[3] = { root_dir
[0], ':' };
3065 if (WNetGetConnection (drive
, remote_name
, sizeof (remote_name
))
3067 /* do something */ ;
3071 info
= lookup_volume_info (root_dir
);
3073 if (info
== NULL
|| ! VOLINFO_STILL_VALID (root_dir
, info
))
3079 /* Info is not cached, or is stale. */
3080 if (w32_unicode_filenames
)
3082 wchar_t root_w
[MAX_PATH
];
3083 wchar_t name_w
[MAX_PATH
+1];
3084 wchar_t type_w
[MAX_PATH
+1];
3086 filename_to_utf16 (root_dir
, root_w
);
3087 if (!GetVolumeInformationW (root_w
,
3088 name_w
, sizeof (name_w
),
3092 type_w
, sizeof (type_w
)))
3094 /* Hmm... not really 100% correct, as these 2 are not file
3096 filename_from_utf16 (name_w
, name
);
3097 filename_from_utf16 (type_w
, type
);
3101 char root_a
[MAX_PATH
];
3102 char name_a
[MAX_PATH
+1];
3103 char type_a
[MAX_PATH
+1];
3105 filename_to_ansi (root_dir
, root_a
);
3106 if (!GetVolumeInformationA (root_a
,
3107 name_a
, sizeof (name_a
),
3111 type_a
, sizeof (type_a
)))
3113 filename_from_ansi (name_a
, name
);
3114 filename_from_ansi (type_a
, type
);
3117 /* Cache the volume information for future use, overwriting existing
3118 entry if present. */
3121 info
= xmalloc (sizeof (volume_info_data
));
3122 add_volume_info (root_dir
, info
);
3130 info
->name
= xstrdup (name
);
3131 unixtodos_filename (info
->name
);
3132 info
->serialnum
= serialnum
;
3133 info
->maxcomp
= maxcomp
;
3134 info
->flags
= flags
;
3135 info
->type
= xstrdup (type
);
3136 info
->timestamp
= GetTickCount ();
3142 /* Get information on the volume where NAME is held; set path pointer to
3143 start of pathname in NAME (past UNC header\volume header if present),
3144 if pPath is non-NULL.
3146 Note: if NAME includes symlinks, the information is for the volume
3147 of the symlink, not of its target. That's because, even though
3148 GetVolumeInformation returns information about the symlink target
3149 of its argument, we only pass the root directory to
3150 GetVolumeInformation, not the full NAME. */
3152 get_volume_info (const char * name
, const char ** pPath
)
3154 char temp
[MAX_UTF8_PATH
];
3155 char *rootname
= NULL
; /* default to current volume */
3156 volume_info_data
* info
;
3157 int root_len
= parse_root (name
, pPath
);
3162 /* Copy the root name of the volume, if given. */
3165 strncpy (temp
, name
, root_len
);
3166 temp
[root_len
] = '\0';
3167 unixtodos_filename (temp
);
3171 info
= GetCachedVolumeInformation (rootname
);
3174 /* Set global referenced by other functions. */
3175 volume_info
= *info
;
3181 /* Determine if volume is FAT format (ie. only supports short 8.3
3182 names); also set path pointer to start of pathname in name, if
3183 pPath is non-NULL. */
3185 is_fat_volume (const char * name
, const char ** pPath
)
3187 if (get_volume_info (name
, pPath
))
3188 return (volume_info
.maxcomp
== 12);
3192 /* Convert all slashes in a filename to backslashes, and map filename
3193 to a valid 8.3 name if necessary. The result is a pointer to a
3194 static buffer, so CAVEAT EMPTOR! */
3196 map_w32_filename (const char * name
, const char ** pPath
)
3198 static char shortname
[MAX_UTF8_PATH
];
3199 char * str
= shortname
;
3202 const char * save_name
= name
;
3204 if (strlen (name
) >= sizeof (shortname
))
3206 /* Return a filename which will cause callers to fail. */
3207 strcpy (shortname
, "?");
3211 if (is_fat_volume (name
, (const char **)&path
)) /* truncate to 8.3 */
3213 register int left
= 8; /* maximum number of chars in part */
3214 register int extn
= 0; /* extension added? */
3215 register int dots
= 2; /* maximum number of dots allowed */
3218 *str
++ = *name
++; /* skip past UNC header */
3220 while ((c
= *name
++))
3227 *str
++ = (c
== ':' ? ':' : '\\');
3228 extn
= 0; /* reset extension flags */
3229 dots
= 2; /* max 2 dots */
3230 left
= 8; /* max length 8 for main part */
3235 /* Convert path components of the form .xxx to _xxx,
3236 but leave . and .. as they are. This allows .emacs
3237 to be read as _emacs, for example. */
3241 IS_DIRECTORY_SEP (*name
))
3256 extn
= 1; /* we've got an extension */
3257 left
= 3; /* 3 chars in extension */
3261 /* any embedded dots after the first are converted to _ */
3266 case '#': /* don't lose these, they're important */
3268 str
[-1] = c
; /* replace last character of part */
3271 if ( left
&& 'A' <= c
&& c
<= 'Z' )
3273 *str
++ = tolower (c
); /* map to lower case (looks nicer) */
3275 dots
= 0; /* started a path component */
3284 strcpy (shortname
, name
);
3285 unixtodos_filename (shortname
);
3289 *pPath
= shortname
+ (path
- save_name
);
3295 is_exec (const char * name
)
3297 char * p
= strrchr (name
, '.');
3300 && (xstrcasecmp (p
, ".exe") == 0 ||
3301 xstrcasecmp (p
, ".com") == 0 ||
3302 xstrcasecmp (p
, ".bat") == 0 ||
3303 xstrcasecmp (p
, ".cmd") == 0));
3306 /* Emulate the Unix directory procedures opendir, closedir, and
3307 readdir. We rename them to sys_* names because some versions of
3308 MinGW startup code call opendir and readdir to glob wildcards, and
3309 the code that calls them doesn't grok UTF-8 encoded file names we
3310 produce in dirent->d_name[]. */
3312 struct dirent dir_static
; /* simulated directory contents */
3313 static HANDLE dir_find_handle
= INVALID_HANDLE_VALUE
;
3314 static int dir_is_fat
;
3315 static char dir_pathname
[MAX_UTF8_PATH
];
3316 static WIN32_FIND_DATAW dir_find_data_w
;
3317 static WIN32_FIND_DATAA dir_find_data_a
;
3318 #define DIR_FIND_DATA_W 1
3319 #define DIR_FIND_DATA_A 2
3320 static int last_dir_find_data
= -1;
3322 /* Support shares on a network resource as subdirectories of a read-only
3324 static HANDLE wnet_enum_handle
= INVALID_HANDLE_VALUE
;
3325 static HANDLE
open_unc_volume (const char *);
3326 static void *read_unc_volume (HANDLE
, wchar_t *, char *, int);
3327 static void close_unc_volume (HANDLE
);
3330 sys_opendir (const char *filename
)
3334 /* Opening is done by FindFirstFile. However, a read is inherent to
3335 this operation, so we defer the open until read time. */
3337 if (dir_find_handle
!= INVALID_HANDLE_VALUE
)
3339 if (wnet_enum_handle
!= INVALID_HANDLE_VALUE
)
3342 /* Note: We don't support traversal of UNC volumes via symlinks.
3343 Doing so would mean punishing 99.99% of use cases by resolving
3344 all the possible symlinks in FILENAME, recursively. */
3345 if (is_unc_volume (filename
))
3347 wnet_enum_handle
= open_unc_volume (filename
);
3348 if (wnet_enum_handle
== INVALID_HANDLE_VALUE
)
3352 if (!(dirp
= (DIR *) malloc (sizeof (DIR))))
3359 strncpy (dir_pathname
, map_w32_filename (filename
, NULL
), MAX_UTF8_PATH
- 1);
3360 dir_pathname
[MAX_UTF8_PATH
- 1] = '\0';
3361 /* Note: We don't support symlinks to file names on FAT volumes.
3362 Doing so would mean punishing 99.99% of use cases by resolving
3363 all the possible symlinks in FILENAME, recursively. */
3364 dir_is_fat
= is_fat_volume (filename
, NULL
);
3370 sys_closedir (DIR *dirp
)
3372 /* If we have a find-handle open, close it. */
3373 if (dir_find_handle
!= INVALID_HANDLE_VALUE
)
3375 FindClose (dir_find_handle
);
3376 dir_find_handle
= INVALID_HANDLE_VALUE
;
3378 else if (wnet_enum_handle
!= INVALID_HANDLE_VALUE
)
3380 close_unc_volume (wnet_enum_handle
);
3381 wnet_enum_handle
= INVALID_HANDLE_VALUE
;
3383 xfree ((char *) dirp
);
3387 sys_readdir (DIR *dirp
)
3389 int downcase
= !NILP (Vw32_downcase_file_names
);
3391 if (wnet_enum_handle
!= INVALID_HANDLE_VALUE
)
3393 if (!read_unc_volume (wnet_enum_handle
,
3394 dir_find_data_w
.cFileName
,
3395 dir_find_data_a
.cFileName
,
3399 /* If we aren't dir_finding, do a find-first, otherwise do a find-next. */
3400 else if (dir_find_handle
== INVALID_HANDLE_VALUE
)
3402 char filename
[MAX_UTF8_PATH
];
3404 bool last_slash
= true;
3406 /* Note: We don't need to worry about dir_pathname being longer
3407 than MAX_UTF8_PATH, as sys_opendir already took care of that
3408 when it called map_w32_filename: that function will put a "?"
3409 in its return value in that case, thus failing all the calls
3411 strcpy (filename
, dir_pathname
);
3412 ln
= strlen (filename
);
3413 if (!IS_DIRECTORY_SEP (filename
[ln
- 1]))
3416 /* Note: No need to resolve symlinks in FILENAME, because
3417 FindFirst opens the directory that is the target of a
3419 if (w32_unicode_filenames
)
3421 wchar_t fnw
[MAX_PATH
+ 2];
3423 filename_to_utf16 (filename
, fnw
);
3425 wcscat (fnw
, L
"\\");
3427 dir_find_handle
= FindFirstFileW (fnw
, &dir_find_data_w
);
3431 char fna
[MAX_PATH
+ 2];
3433 filename_to_ansi (filename
, fna
);
3437 /* If FILENAME is not representable by the current ANSI
3438 codepage, we don't want FindFirstFileA to interpret the
3439 '?' characters as a wildcard. */
3440 if (_mbspbrk (fna
, "?"))
3441 dir_find_handle
= INVALID_HANDLE_VALUE
;
3443 dir_find_handle
= FindFirstFileA (fna
, &dir_find_data_a
);
3446 if (dir_find_handle
== INVALID_HANDLE_VALUE
)
3448 /* Any changes in the value of errno here should be in sync
3449 with what directory_files_internal does when it calls
3451 switch (GetLastError ())
3453 /* Windows uses this value when FindFirstFile finds no
3454 files that match the wildcard. This is not supposed
3455 to happen, since our wildcard is "*", but just in
3456 case, if there's some weird empty directory with not
3457 even "." and ".." entries... */
3458 case ERROR_FILE_NOT_FOUND
:
3463 case ERROR_ACCESS_DENIED
:
3464 case ERROR_NETWORK_ACCESS_DENIED
:
3467 case ERROR_PATH_NOT_FOUND
:
3468 case ERROR_INVALID_DRIVE
:
3469 case ERROR_NOT_READY
:
3470 case ERROR_BAD_NETPATH
:
3471 case ERROR_BAD_NET_NAME
:
3478 else if (w32_unicode_filenames
)
3480 if (!FindNextFileW (dir_find_handle
, &dir_find_data_w
))
3488 if (!FindNextFileA (dir_find_handle
, &dir_find_data_a
))
3495 /* Emacs never uses this value, so don't bother making it match
3496 value returned by stat(). */
3497 dir_static
.d_ino
= 1;
3499 if (w32_unicode_filenames
)
3501 if (downcase
|| dir_is_fat
)
3503 wchar_t tem
[MAX_PATH
];
3505 wcscpy (tem
, dir_find_data_w
.cFileName
);
3507 filename_from_utf16 (tem
, dir_static
.d_name
);
3510 filename_from_utf16 (dir_find_data_w
.cFileName
, dir_static
.d_name
);
3511 last_dir_find_data
= DIR_FIND_DATA_W
;
3517 /* If the file name in cFileName[] includes `?' characters, it
3518 means the original file name used characters that cannot be
3519 represented by the current ANSI codepage. To avoid total
3520 lossage, retrieve the short 8+3 alias of the long file
3522 if (_mbspbrk (dir_find_data_a
.cFileName
, "?"))
3524 strcpy (tem
, dir_find_data_a
.cAlternateFileName
);
3525 /* 8+3 aliases are returned in all caps, which could break
3526 various alists that look at filenames' extensions. */
3529 else if (downcase
|| dir_is_fat
)
3530 strcpy (tem
, dir_find_data_a
.cFileName
);
3532 filename_from_ansi (dir_find_data_a
.cFileName
, dir_static
.d_name
);
3533 if (downcase
|| dir_is_fat
)
3536 filename_from_ansi (tem
, dir_static
.d_name
);
3538 last_dir_find_data
= DIR_FIND_DATA_A
;
3541 dir_static
.d_namlen
= strlen (dir_static
.d_name
);
3542 dir_static
.d_reclen
= sizeof (struct dirent
) - MAX_UTF8_PATH
+ 3 +
3543 dir_static
.d_namlen
- dir_static
.d_namlen
% 4;
3549 open_unc_volume (const char *path
)
3551 const char *fn
= map_w32_filename (path
, NULL
);
3555 if (w32_unicode_filenames
)
3558 wchar_t fnw
[MAX_PATH
];
3560 nrw
.dwScope
= RESOURCE_GLOBALNET
;
3561 nrw
.dwType
= RESOURCETYPE_DISK
;
3562 nrw
.dwDisplayType
= RESOURCEDISPLAYTYPE_SERVER
;
3563 nrw
.dwUsage
= RESOURCEUSAGE_CONTAINER
;
3564 nrw
.lpLocalName
= NULL
;
3565 filename_to_utf16 (fn
, fnw
);
3566 nrw
.lpRemoteName
= fnw
;
3567 nrw
.lpComment
= NULL
;
3568 nrw
.lpProvider
= NULL
;
3570 result
= WNetOpenEnumW (RESOURCE_GLOBALNET
, RESOURCETYPE_DISK
,
3571 RESOURCEUSAGE_CONNECTABLE
, &nrw
, &henum
);
3578 nra
.dwScope
= RESOURCE_GLOBALNET
;
3579 nra
.dwType
= RESOURCETYPE_DISK
;
3580 nra
.dwDisplayType
= RESOURCEDISPLAYTYPE_SERVER
;
3581 nra
.dwUsage
= RESOURCEUSAGE_CONTAINER
;
3582 nra
.lpLocalName
= NULL
;
3583 filename_to_ansi (fn
, fna
);
3584 nra
.lpRemoteName
= fna
;
3585 nra
.lpComment
= NULL
;
3586 nra
.lpProvider
= NULL
;
3588 result
= WNetOpenEnumA (RESOURCE_GLOBALNET
, RESOURCETYPE_DISK
,
3589 RESOURCEUSAGE_CONNECTABLE
, &nra
, &henum
);
3591 if (result
== NO_ERROR
)
3595 /* Make sure directory_files_internal reports a sensible error. */
3597 return INVALID_HANDLE_VALUE
;
3602 read_unc_volume (HANDLE henum
, wchar_t *fname_w
, char *fname_a
, int size
)
3607 DWORD bufsize
= 512;
3611 if (w32_unicode_filenames
)
3616 buffer
= alloca (bufsize
);
3617 result
= WNetEnumResourceW (henum
, &count
, buffer
, &bufsize
);
3618 if (result
!= NO_ERROR
)
3620 /* WNetEnumResource returns \\resource\share...skip forward to "share". */
3621 ptrw
= ((LPNETRESOURCEW
) buffer
)->lpRemoteName
;
3623 while (*ptrw
&& *ptrw
!= L
'/' && *ptrw
!= L
'\\') ptrw
++;
3625 wcsncpy (fname_w
, ptrw
, size
);
3630 int dbcs_p
= max_filename_mbslen () > 1;
3633 buffer
= alloca (bufsize
);
3634 result
= WNetEnumResourceA (henum
, &count
, buffer
, &bufsize
);
3635 if (result
!= NO_ERROR
)
3637 ptra
= ((LPNETRESOURCEA
) buffer
)->lpRemoteName
;
3640 while (*ptra
&& !IS_DIRECTORY_SEP (*ptra
)) ptra
++;
3643 while (*ptra
&& !IS_DIRECTORY_SEP (*ptra
))
3644 ptra
= CharNextExA (file_name_codepage
, ptra
, 0);
3647 strncpy (fname_a
, ptra
, size
);
3655 close_unc_volume (HANDLE henum
)
3657 if (henum
!= INVALID_HANDLE_VALUE
)
3658 WNetCloseEnum (henum
);
3662 unc_volume_file_attributes (const char *path
)
3667 henum
= open_unc_volume (path
);
3668 if (henum
== INVALID_HANDLE_VALUE
)
3671 attrs
= FILE_ATTRIBUTE_READONLY
| FILE_ATTRIBUTE_DIRECTORY
;
3673 close_unc_volume (henum
);
3678 /* Ensure a network connection is authenticated. */
3680 logon_network_drive (const char *path
)
3682 char share
[MAX_UTF8_PATH
];
3689 if (IS_DIRECTORY_SEP (path
[0]) && IS_DIRECTORY_SEP (path
[1]))
3690 drvtype
= DRIVE_REMOTE
;
3691 else if (path
[0] == '\0' || path
[1] != ':')
3692 drvtype
= GetDriveType (NULL
);
3699 drvtype
= GetDriveType (drive
);
3702 /* Only logon to networked drives. */
3703 if (drvtype
!= DRIVE_REMOTE
)
3707 strncpy (share
, path
, MAX_UTF8_PATH
);
3708 /* Truncate to just server and share name. */
3709 for (p
= share
+ 2; *p
&& p
< share
+ MAX_UTF8_PATH
; p
++)
3711 if (IS_DIRECTORY_SEP (*p
) && ++n_slashes
> 3)
3718 if (w32_unicode_filenames
)
3720 NETRESOURCEW resourcew
;
3721 wchar_t share_w
[MAX_PATH
];
3723 resourcew
.dwScope
= RESOURCE_GLOBALNET
;
3724 resourcew
.dwType
= RESOURCETYPE_DISK
;
3725 resourcew
.dwDisplayType
= RESOURCEDISPLAYTYPE_SHARE
;
3726 resourcew
.dwUsage
= RESOURCEUSAGE_CONTAINER
;
3727 resourcew
.lpLocalName
= NULL
;
3728 filename_to_utf16 (share
, share_w
);
3729 resourcew
.lpRemoteName
= share_w
;
3730 resourcew
.lpProvider
= NULL
;
3732 val
= WNetAddConnection2W (&resourcew
, NULL
, NULL
, CONNECT_INTERACTIVE
);
3736 NETRESOURCEA resourcea
;
3737 char share_a
[MAX_PATH
];
3739 resourcea
.dwScope
= RESOURCE_GLOBALNET
;
3740 resourcea
.dwType
= RESOURCETYPE_DISK
;
3741 resourcea
.dwDisplayType
= RESOURCEDISPLAYTYPE_SHARE
;
3742 resourcea
.dwUsage
= RESOURCEUSAGE_CONTAINER
;
3743 resourcea
.lpLocalName
= NULL
;
3744 filename_to_ansi (share
, share_a
);
3745 resourcea
.lpRemoteName
= share_a
;
3746 resourcea
.lpProvider
= NULL
;
3748 val
= WNetAddConnection2A (&resourcea
, NULL
, NULL
, CONNECT_INTERACTIVE
);
3754 case ERROR_ALREADY_ASSIGNED
:
3756 case ERROR_ACCESS_DENIED
:
3757 case ERROR_LOGON_FAILURE
:
3763 case ERROR_BAD_NET_NAME
:
3764 case ERROR_NO_NET_OR_BAD_PATH
:
3765 case ERROR_NO_NETWORK
:
3766 case ERROR_CANCELLED
:
3773 /* Emulate faccessat(2). */
3775 faccessat (int dirfd
, const char * path
, int mode
, int flags
)
3779 if (dirfd
!= AT_FDCWD
3780 && !(IS_DIRECTORY_SEP (path
[0])
3781 || IS_DEVICE_SEP (path
[1])))
3787 /* MSVCRT implementation of 'access' doesn't recognize D_OK, and its
3788 newer versions blow up when passed D_OK. */
3789 path
= map_w32_filename (path
, NULL
);
3790 /* If the last element of PATH is a symlink, we need to resolve it
3791 to get the attributes of its target file. Note: any symlinks in
3792 PATH elements other than the last one are transparently resolved
3793 by GetFileAttributes below. */
3794 if ((volume_info
.flags
& FILE_SUPPORTS_REPARSE_POINTS
) != 0
3795 && (flags
& AT_SYMLINK_NOFOLLOW
) == 0)
3796 path
= chase_symlinks (path
);
3798 if (w32_unicode_filenames
)
3800 wchar_t path_w
[MAX_PATH
];
3802 filename_to_utf16 (path
, path_w
);
3803 attributes
= GetFileAttributesW (path_w
);
3807 char path_a
[MAX_PATH
];
3809 filename_to_ansi (path
, path_a
);
3810 attributes
= GetFileAttributesA (path_a
);
3813 if (attributes
== -1)
3815 DWORD w32err
= GetLastError ();
3819 case ERROR_INVALID_NAME
:
3820 case ERROR_BAD_PATHNAME
:
3821 if (is_unc_volume (path
))
3823 attributes
= unc_volume_file_attributes (path
);
3824 if (attributes
== -1)
3832 case ERROR_FILE_NOT_FOUND
:
3833 case ERROR_BAD_NETPATH
:
3842 if ((mode
& X_OK
) != 0
3843 && !(is_exec (path
) || (attributes
& FILE_ATTRIBUTE_DIRECTORY
) != 0))
3848 if ((mode
& W_OK
) != 0 && (attributes
& FILE_ATTRIBUTE_READONLY
) != 0)
3853 if ((mode
& D_OK
) != 0 && (attributes
& FILE_ATTRIBUTE_DIRECTORY
) == 0)
3861 /* A special test for DIRNAME being a directory accessible by the
3862 current user. This is needed because the security permissions in
3863 directory's ACLs are not visible in the Posix-style mode bits
3864 returned by 'stat' and in attributes returned by GetFileAttributes.
3865 So a directory would seem like it's readable by the current user,
3866 but will in fact error out with EACCES when they actually try. */
3868 w32_accessible_directory_p (const char *dirname
, ptrdiff_t dirlen
)
3870 char pattern
[MAX_UTF8_PATH
];
3871 bool last_slash
= dirlen
> 0 && IS_DIRECTORY_SEP (dirname
[dirlen
- 1]);
3874 /* Note: map_w32_filename makes sure DIRNAME is not longer than
3876 strcpy (pattern
, map_w32_filename (dirname
, NULL
));
3878 /* Note: No need to resolve symlinks in FILENAME, because FindFirst
3879 opens the directory that is the target of a symlink. */
3880 if (w32_unicode_filenames
)
3882 wchar_t pat_w
[MAX_PATH
+ 2];
3883 WIN32_FIND_DATAW dfd_w
;
3885 filename_to_utf16 (pattern
, pat_w
);
3887 wcscat (pat_w
, L
"\\");
3888 wcscat (pat_w
, L
"*");
3889 dh
= FindFirstFileW (pat_w
, &dfd_w
);
3893 char pat_a
[MAX_PATH
+ 2];
3894 WIN32_FIND_DATAA dfd_a
;
3896 filename_to_ansi (pattern
, pat_a
);
3898 strcpy (pat_a
, "\\");
3899 strcat (pat_a
, "*");
3900 /* In case DIRNAME cannot be expressed in characters from the
3901 current ANSI codepage. */
3902 if (_mbspbrk (pat_a
, "?"))
3903 dh
= INVALID_HANDLE_VALUE
;
3905 dh
= FindFirstFileA (pat_a
, &dfd_a
);
3908 if (dh
== INVALID_HANDLE_VALUE
)
3914 /* A version of 'access' to be used locally with file names in
3915 locale-specific encoding. Does not resolve symlinks and does not
3916 support file names on FAT12 and FAT16 volumes, but that's OK, since
3917 we only invoke this function for files inside the Emacs source or
3918 installation tree, on directories (so any symlinks should have the
3919 directory bit set), and on short file names such as "C:/.emacs". */
3921 sys_access (const char *fname
, int mode
)
3923 char fname_copy
[MAX_PATH
], *p
;
3926 strcpy (fname_copy
, fname
);
3927 /* Do the equivalent of unixtodos_filename. */
3928 for (p
= fname_copy
; *p
; p
= CharNext (p
))
3932 if ((attributes
= GetFileAttributesA (fname_copy
)) == -1)
3934 DWORD w32err
= GetLastError ();
3938 case ERROR_INVALID_NAME
:
3939 case ERROR_BAD_PATHNAME
:
3940 case ERROR_FILE_NOT_FOUND
:
3941 case ERROR_BAD_NETPATH
:
3950 if ((mode
& X_OK
) != 0
3951 && !(is_exec (fname_copy
)
3952 || (attributes
& FILE_ATTRIBUTE_DIRECTORY
) != 0))
3957 if ((mode
& W_OK
) != 0 && (attributes
& FILE_ATTRIBUTE_READONLY
) != 0)
3962 if ((mode
& D_OK
) != 0 && (attributes
& FILE_ATTRIBUTE_DIRECTORY
) == 0)
3970 /* Shadow some MSVC runtime functions to map requests for long filenames
3971 to reasonable short names if necessary. This was originally added to
3972 permit running Emacs on NT 3.1 on a FAT partition, which doesn't support
3976 sys_chdir (const char * path
)
3978 path
= map_w32_filename (path
, NULL
);
3979 if (w32_unicode_filenames
)
3981 wchar_t newdir_w
[MAX_PATH
];
3983 if (filename_to_utf16 (path
, newdir_w
) == 0)
3984 return _wchdir (newdir_w
);
3989 char newdir_a
[MAX_PATH
];
3991 if (filename_to_ansi (path
, newdir_a
) == 0)
3992 return _chdir (newdir_a
);
3998 sys_chmod (const char * path
, int mode
)
4000 path
= chase_symlinks (map_w32_filename (path
, NULL
));
4001 if (w32_unicode_filenames
)
4003 wchar_t path_w
[MAX_PATH
];
4005 filename_to_utf16 (path
, path_w
);
4006 return _wchmod (path_w
, mode
);
4010 char path_a
[MAX_PATH
];
4012 filename_to_ansi (path
, path_a
);
4013 return _chmod (path_a
, mode
);
4018 sys_creat (const char * path
, int mode
)
4020 path
= map_w32_filename (path
, NULL
);
4021 if (w32_unicode_filenames
)
4023 wchar_t path_w
[MAX_PATH
];
4025 filename_to_utf16 (path
, path_w
);
4026 return _wcreat (path_w
, mode
);
4030 char path_a
[MAX_PATH
];
4032 filename_to_ansi (path
, path_a
);
4033 return _creat (path_a
, mode
);
4038 sys_fopen (const char * path
, const char * mode
)
4042 const char * mode_save
= mode
;
4044 /* Force all file handles to be non-inheritable. This is necessary to
4045 ensure child processes don't unwittingly inherit handles that might
4046 prevent future file access. */
4050 else if (mode
[0] == 'w' || mode
[0] == 'a')
4051 oflag
= O_WRONLY
| O_CREAT
| O_TRUNC
;
4055 /* Only do simplistic option parsing. */
4059 oflag
&= ~(O_RDONLY
| O_WRONLY
);
4062 else if (mode
[0] == 'b')
4067 else if (mode
[0] == 't')
4074 path
= map_w32_filename (path
, NULL
);
4075 if (w32_unicode_filenames
)
4077 wchar_t path_w
[MAX_PATH
];
4079 filename_to_utf16 (path
, path_w
);
4080 fd
= _wopen (path_w
, oflag
| _O_NOINHERIT
, 0644);
4084 char path_a
[MAX_PATH
];
4086 filename_to_ansi (path
, path_a
);
4087 fd
= _open (path_a
, oflag
| _O_NOINHERIT
, 0644);
4092 return _fdopen (fd
, mode_save
);
4095 /* This only works on NTFS volumes, but is useful to have. */
4097 sys_link (const char * old
, const char * new)
4101 char oldname
[MAX_UTF8_PATH
], newname
[MAX_UTF8_PATH
];
4102 wchar_t oldname_w
[MAX_PATH
];
4103 char oldname_a
[MAX_PATH
];
4105 if (old
== NULL
|| new == NULL
)
4111 strcpy (oldname
, map_w32_filename (old
, NULL
));
4112 strcpy (newname
, map_w32_filename (new, NULL
));
4114 if (w32_unicode_filenames
)
4116 filename_to_utf16 (oldname
, oldname_w
);
4117 fileh
= CreateFileW (oldname_w
, 0, 0, NULL
, OPEN_EXISTING
,
4118 FILE_FLAG_BACKUP_SEMANTICS
, NULL
);
4122 filename_to_ansi (oldname
, oldname_a
);
4123 fileh
= CreateFileA (oldname_a
, 0, 0, NULL
, OPEN_EXISTING
,
4124 FILE_FLAG_BACKUP_SEMANTICS
, NULL
);
4126 if (fileh
!= INVALID_HANDLE_VALUE
)
4130 /* Confusingly, the "alternate" stream name field does not apply
4131 when restoring a hard link, and instead contains the actual
4132 stream data for the link (ie. the name of the link to create).
4133 The WIN32_STREAM_ID structure before the cStreamName field is
4134 the stream header, which is then immediately followed by the
4138 WIN32_STREAM_ID wid
;
4139 WCHAR wbuffer
[MAX_PATH
]; /* extra space for link name */
4142 /* We used to pass MB_PRECOMPOSED as the 2nd arg here, but MSDN
4143 indicates that flag is unsupported for CP_UTF8, and OTOH says
4144 it is the default anyway. */
4145 wlen
= pMultiByteToWideChar (CP_UTF8
, 0, newname
, -1,
4146 data
.wid
.cStreamName
, MAX_PATH
);
4149 LPVOID context
= NULL
;
4152 data
.wid
.dwStreamId
= BACKUP_LINK
;
4153 data
.wid
.dwStreamAttributes
= 0;
4154 data
.wid
.Size
.LowPart
= wlen
* sizeof (WCHAR
);
4155 data
.wid
.Size
.HighPart
= 0;
4156 data
.wid
.dwStreamNameSize
= 0;
4158 if (BackupWrite (fileh
, (LPBYTE
)&data
,
4159 offsetof (WIN32_STREAM_ID
, cStreamName
)
4160 + data
.wid
.Size
.LowPart
,
4161 &wbytes
, FALSE
, FALSE
, &context
)
4162 && BackupWrite (fileh
, NULL
, 0, &wbytes
, TRUE
, FALSE
, &context
))
4169 DWORD err
= GetLastError ();
4174 case ERROR_ACCESS_DENIED
:
4175 /* This is what happens when OLDNAME is a directory,
4176 since Windows doesn't support hard links to
4177 directories. Posix says to set errno to EPERM in
4179 if (w32_unicode_filenames
)
4180 attributes
= GetFileAttributesW (oldname_w
);
4182 attributes
= GetFileAttributesA (oldname_a
);
4183 if (attributes
!= -1
4184 && (attributes
& FILE_ATTRIBUTE_DIRECTORY
) != 0)
4186 else if (attributes
== -1
4187 && is_unc_volume (oldname
)
4188 && unc_volume_file_attributes (oldname
) != -1)
4193 case ERROR_TOO_MANY_LINKS
:
4196 case ERROR_NOT_SAME_DEVICE
:
4206 CloseHandle (fileh
);
4215 sys_mkdir (const char * path
)
4217 path
= map_w32_filename (path
, NULL
);
4219 if (w32_unicode_filenames
)
4221 wchar_t path_w
[MAX_PATH
];
4223 filename_to_utf16 (path
, path_w
);
4224 return _wmkdir (path_w
);
4228 char path_a
[MAX_PATH
];
4230 filename_to_ansi (path
, path_a
);
4231 return _mkdir (path_a
);
4236 sys_open (const char * path
, int oflag
, int mode
)
4238 const char* mpath
= map_w32_filename (path
, NULL
);
4241 if (w32_unicode_filenames
)
4243 wchar_t mpath_w
[MAX_PATH
];
4245 filename_to_utf16 (mpath
, mpath_w
);
4246 /* If possible, try to open file without _O_CREAT, to be able to
4247 write to existing hidden and system files. Force all file
4248 handles to be non-inheritable. */
4249 if ((oflag
& (_O_CREAT
| _O_EXCL
)) != (_O_CREAT
| _O_EXCL
))
4250 res
= _wopen (mpath_w
, (oflag
& ~_O_CREAT
) | _O_NOINHERIT
, mode
);
4252 res
= _wopen (mpath_w
, oflag
| _O_NOINHERIT
, mode
);
4256 char mpath_a
[MAX_PATH
];
4258 filename_to_ansi (mpath
, mpath_a
);
4259 if ((oflag
& (_O_CREAT
| _O_EXCL
)) != (_O_CREAT
| _O_EXCL
))
4260 res
= _open (mpath_a
, (oflag
& ~_O_CREAT
) | _O_NOINHERIT
, mode
);
4262 res
= _open (mpath_a
, oflag
| _O_NOINHERIT
, mode
);
4268 /* Implementation of mkostemp for MS-Windows, to avoid race conditions
4271 Standard algorithm for generating a temporary file name seems to be
4272 use pid or tid with a letter on the front (in place of the 6 X's)
4273 and cycle through the letters to find a unique name. We extend
4274 that to allow any reasonable character as the first of the 6 X's,
4275 so that the number of simultaneously used temporary files will be
4279 mkostemp (char * template, int flags
)
4283 unsigned uid
= GetCurrentThreadId ();
4284 int save_errno
= errno
;
4285 static char first_char
[] = "abcdefghijklmnopqrstuvwyz0123456789!%-_@#";
4288 if (template == NULL
)
4291 p
= template + strlen (template);
4293 /* replace up to the last 5 X's with uid in decimal */
4294 while (--p
>= template && p
[0] == 'X' && --i
>= 0)
4296 p
[0] = '0' + uid
% 10;
4300 if (i
< 0 && p
[0] == 'X')
4305 p
[0] = first_char
[i
];
4306 if ((fd
= sys_open (template,
4307 flags
| _O_CREAT
| _O_EXCL
| _O_RDWR
,
4308 S_IRUSR
| S_IWUSR
)) >= 0
4316 while (++i
< sizeof (first_char
));
4319 /* Template is badly formed or else we can't generate a unique name. */
4324 fchmod (int fd
, mode_t mode
)
4330 sys_rename_replace (const char *oldname
, const char *newname
, BOOL force
)
4333 char temp
[MAX_UTF8_PATH
], temp_a
[MAX_PATH
];;
4336 bool have_temp_a
= false;
4338 /* MoveFile on Windows 95 doesn't correctly change the short file name
4339 alias in a number of circumstances (it is not easy to predict when
4340 just by looking at oldname and newname, unfortunately). In these
4341 cases, renaming through a temporary name avoids the problem.
4343 A second problem on Windows 95 is that renaming through a temp name when
4344 newname is uppercase fails (the final long name ends up in
4345 lowercase, although the short alias might be uppercase) UNLESS the
4346 long temp name is not 8.3.
4348 So, on Windows 95 we always rename through a temp name, and we make sure
4349 the temp name has a long extension to ensure correct renaming. */
4351 strcpy (temp
, map_w32_filename (oldname
, NULL
));
4353 /* volume_info is set indirectly by map_w32_filename. */
4354 oldname_dev
= volume_info
.serialnum
;
4356 if (os_subtype
== OS_9X
)
4361 char oldname_a
[MAX_PATH
];
4363 oldname
= map_w32_filename (oldname
, NULL
);
4364 filename_to_ansi (oldname
, oldname_a
);
4365 filename_to_ansi (temp
, temp_a
);
4366 if ((o
= strrchr (oldname_a
, '\\')))
4369 o
= (char *) oldname_a
;
4371 if ((p
= strrchr (temp_a
, '\\')))
4378 /* Force temp name to require a manufactured 8.3 alias - this
4379 seems to make the second rename work properly. */
4380 sprintf (p
, "_.%s.%u", o
, i
);
4382 result
= rename (oldname_a
, temp_a
);
4384 /* This loop must surely terminate! */
4385 while (result
< 0 && errno
== EEXIST
);
4391 /* If FORCE, emulate Unix behavior - newname is deleted if it already exists
4392 (at least if it is a file; don't do this for directories).
4394 Since we mustn't do this if we are just changing the case of the
4395 file name (we would end up deleting the file we are trying to
4396 rename!), we let rename detect if the destination file already
4397 exists - that way we avoid the possible pitfalls of trying to
4398 determine ourselves whether two names really refer to the same
4399 file, which is not always possible in the general case. (Consider
4400 all the permutations of shared or subst'd drives, etc.) */
4402 newname
= map_w32_filename (newname
, NULL
);
4404 /* volume_info is set indirectly by map_w32_filename. */
4405 newname_dev
= volume_info
.serialnum
;
4407 if (w32_unicode_filenames
)
4409 wchar_t temp_w
[MAX_PATH
], newname_w
[MAX_PATH
];
4411 filename_to_utf16 (temp
, temp_w
);
4412 filename_to_utf16 (newname
, newname_w
);
4413 result
= _wrename (temp_w
, newname_w
);
4414 if (result
< 0 && force
)
4416 DWORD w32err
= GetLastError ();
4419 && newname_dev
!= oldname_dev
)
4421 /* The implementation of `rename' on Windows does not return
4422 errno = EXDEV when you are moving a directory to a
4423 different storage device (ex. logical disk). It returns
4424 EACCES instead. So here we handle such situations and
4428 if ((attributes
= GetFileAttributesW (temp_w
)) != -1
4429 && (attributes
& FILE_ATTRIBUTE_DIRECTORY
))
4432 else if (errno
== EEXIST
)
4434 if (_wchmod (newname_w
, 0666) != 0)
4436 if (_wunlink (newname_w
) != 0)
4438 result
= _wrename (temp_w
, newname_w
);
4440 else if (w32err
== ERROR_PRIVILEGE_NOT_HELD
4441 && is_symlink (temp
))
4443 /* This is Windows prohibiting the user from creating a
4444 symlink in another place, since that requires
4452 char newname_a
[MAX_PATH
];
4455 filename_to_ansi (temp
, temp_a
);
4456 filename_to_ansi (newname
, newname_a
);
4457 result
= rename (temp_a
, newname_a
);
4458 if (result
< 0 && force
)
4460 DWORD w32err
= GetLastError ();
4463 && newname_dev
!= oldname_dev
)
4467 if ((attributes
= GetFileAttributesA (temp_a
)) != -1
4468 && (attributes
& FILE_ATTRIBUTE_DIRECTORY
))
4471 else if (errno
== EEXIST
)
4473 if (_chmod (newname_a
, 0666) != 0)
4475 if (_unlink (newname_a
) != 0)
4477 result
= rename (temp_a
, newname_a
);
4479 else if (w32err
== ERROR_PRIVILEGE_NOT_HELD
4480 && is_symlink (temp
))
4489 sys_rename (char const *old
, char const *new)
4491 return sys_rename_replace (old
, new, TRUE
);
4495 sys_rmdir (const char * path
)
4497 path
= map_w32_filename (path
, NULL
);
4499 if (w32_unicode_filenames
)
4501 wchar_t path_w
[MAX_PATH
];
4503 filename_to_utf16 (path
, path_w
);
4504 return _wrmdir (path_w
);
4508 char path_a
[MAX_PATH
];
4510 filename_to_ansi (path
, path_a
);
4511 return _rmdir (path_a
);
4516 sys_unlink (const char * path
)
4518 path
= map_w32_filename (path
, NULL
);
4520 if (w32_unicode_filenames
)
4522 wchar_t path_w
[MAX_PATH
];
4524 filename_to_utf16 (path
, path_w
);
4525 /* On Unix, unlink works without write permission. */
4526 _wchmod (path_w
, 0666);
4527 return _wunlink (path_w
);
4531 char path_a
[MAX_PATH
];
4533 filename_to_ansi (path
, path_a
);
4534 _chmod (path_a
, 0666);
4535 return _unlink (path_a
);
4539 static FILETIME utc_base_ft
;
4540 static ULONGLONG utc_base
; /* In 100ns units */
4541 static int init
= 0;
4543 #define FILETIME_TO_U64(result, ft) \
4545 ULARGE_INTEGER uiTemp; \
4546 uiTemp.LowPart = (ft).dwLowDateTime; \
4547 uiTemp.HighPart = (ft).dwHighDateTime; \
4548 result = uiTemp.QuadPart; \
4552 initialize_utc_base (void)
4554 /* Determine the delta between 1-Jan-1601 and 1-Jan-1970. */
4563 st
.wMilliseconds
= 0;
4565 SystemTimeToFileTime (&st
, &utc_base_ft
);
4566 FILETIME_TO_U64 (utc_base
, utc_base_ft
);
4570 convert_time (FILETIME ft
)
4576 initialize_utc_base ();
4580 if (CompareFileTime (&ft
, &utc_base_ft
) < 0)
4583 FILETIME_TO_U64 (tmp
, ft
);
4584 return (time_t) ((tmp
- utc_base
) / 10000000L);
4588 convert_from_time_t (time_t time
, FILETIME
* pft
)
4594 initialize_utc_base ();
4598 /* time in 100ns units since 1-Jan-1601 */
4599 tmp
.QuadPart
= (ULONGLONG
) time
* 10000000L + utc_base
;
4600 pft
->dwHighDateTime
= tmp
.HighPart
;
4601 pft
->dwLowDateTime
= tmp
.LowPart
;
4604 static PSECURITY_DESCRIPTOR
4605 get_file_security_desc_by_handle (HANDLE h
)
4607 PSECURITY_DESCRIPTOR psd
= NULL
;
4609 SECURITY_INFORMATION si
= OWNER_SECURITY_INFORMATION
4610 | GROUP_SECURITY_INFORMATION
/* | DACL_SECURITY_INFORMATION */ ;
4612 err
= get_security_info (h
, SE_FILE_OBJECT
, si
,
4613 NULL
, NULL
, NULL
, NULL
, &psd
);
4614 if (err
!= ERROR_SUCCESS
)
4620 static PSECURITY_DESCRIPTOR
4621 get_file_security_desc_by_name (const char *fname
)
4623 PSECURITY_DESCRIPTOR psd
= NULL
;
4625 SECURITY_INFORMATION si
= OWNER_SECURITY_INFORMATION
4626 | GROUP_SECURITY_INFORMATION
/* | DACL_SECURITY_INFORMATION */ ;
4628 if (!get_file_security (fname
, si
, psd
, 0, &sd_len
))
4630 err
= GetLastError ();
4631 if (err
!= ERROR_INSUFFICIENT_BUFFER
)
4635 psd
= xmalloc (sd_len
);
4636 if (!get_file_security (fname
, si
, psd
, sd_len
, &sd_len
))
4648 unsigned n_subauthorities
;
4650 /* Use the last sub-authority value of the RID, the relative
4651 portion of the SID, as user/group ID. */
4652 n_subauthorities
= *get_sid_sub_authority_count (sid
);
4653 if (n_subauthorities
< 1)
4654 return 0; /* the "World" RID */
4655 return *get_sid_sub_authority (sid
, n_subauthorities
- 1);
4658 /* Caching SID and account values for faster lokup. */
4662 struct w32_id
*next
;
4664 unsigned char sid
[FLEXIBLE_ARRAY_MEMBER
];
4667 static struct w32_id
*w32_idlist
;
4670 w32_cached_id (PSID sid
, unsigned *id
, char *name
)
4672 struct w32_id
*tail
, *found
;
4674 for (found
= NULL
, tail
= w32_idlist
; tail
; tail
= tail
->next
)
4676 if (equal_sid ((PSID
)tail
->sid
, sid
))
4685 strcpy (name
, found
->name
);
4693 w32_add_to_cache (PSID sid
, unsigned id
, char *name
)
4696 struct w32_id
*new_entry
;
4698 /* We don't want to leave behind stale cache from when Emacs was
4702 sid_len
= get_length_sid (sid
);
4703 new_entry
= xmalloc (offsetof (struct w32_id
, sid
) + sid_len
);
4706 new_entry
->rid
= id
;
4707 strcpy (new_entry
->name
, name
);
4708 copy_sid (sid_len
, (PSID
)new_entry
->sid
, sid
);
4709 new_entry
->next
= w32_idlist
;
4710 w32_idlist
= new_entry
;
4719 get_name_and_id (PSECURITY_DESCRIPTOR psd
, unsigned *id
, char *nm
, int what
)
4723 SID_NAME_USE ignore
;
4725 DWORD name_len
= sizeof (name
);
4727 DWORD domain_len
= sizeof (domain
);
4732 result
= get_security_descriptor_owner (psd
, &sid
, &dflt
);
4733 else if (what
== GID
)
4734 result
= get_security_descriptor_group (psd
, &sid
, &dflt
);
4738 if (!result
|| !is_valid_sid (sid
))
4740 else if (!w32_cached_id (sid
, id
, nm
))
4742 if (!lookup_account_sid (NULL
, sid
, name
, &name_len
,
4743 domain
, &domain_len
, &ignore
)
4744 || name_len
> UNLEN
+1)
4748 *id
= get_rid (sid
);
4750 w32_add_to_cache (sid
, *id
, name
);
4757 get_file_owner_and_group (PSECURITY_DESCRIPTOR psd
, struct stat
*st
)
4759 int dflt_usr
= 0, dflt_grp
= 0;
4768 if (get_name_and_id (psd
, &st
->st_uid
, st
->st_uname
, UID
))
4770 if (get_name_and_id (psd
, &st
->st_gid
, st
->st_gname
, GID
))
4773 /* Consider files to belong to current user/group, if we cannot get
4774 more accurate information. */
4777 st
->st_uid
= dflt_passwd
.pw_uid
;
4778 strcpy (st
->st_uname
, dflt_passwd
.pw_name
);
4782 st
->st_gid
= dflt_passwd
.pw_gid
;
4783 strcpy (st
->st_gname
, dflt_group
.gr_name
);
4787 /* Return non-zero if NAME is a potentially slow filesystem. */
4789 is_slow_fs (const char *name
)
4794 if (IS_DIRECTORY_SEP (name
[0]) && IS_DIRECTORY_SEP (name
[1]))
4795 devtype
= DRIVE_REMOTE
; /* assume UNC name is remote */
4796 else if (!(strlen (name
) >= 2 && IS_DEVICE_SEP (name
[1])))
4797 devtype
= GetDriveType (NULL
); /* use root of current drive */
4800 /* GetDriveType needs the root directory of the drive. */
4801 strncpy (drive_root
, name
, 2);
4802 drive_root
[2] = '\\';
4803 drive_root
[3] = '\0';
4804 devtype
= GetDriveType (drive_root
);
4806 return !(devtype
== DRIVE_FIXED
|| devtype
== DRIVE_RAMDISK
);
4809 /* If this is non-zero, the caller wants accurate information about
4810 file's owner and group, which could be expensive to get. dired.c
4811 uses this flag when needed for the job at hand. */
4812 int w32_stat_get_owner_group
;
4814 /* MSVC stat function can't cope with UNC names and has other bugs, so
4815 replace it with our own. This also allows us to calculate consistent
4816 inode values and owner/group without hacks in the main Emacs code,
4817 and support file names encoded in UTF-8. */
4820 stat_worker (const char * path
, struct stat
* buf
, int follow_symlinks
)
4822 char *name
, *save_name
, *r
;
4823 WIN32_FIND_DATAW wfd_w
;
4824 WIN32_FIND_DATAA wfd_a
;
4826 unsigned __int64 fake_inode
= 0;
4829 int rootdir
= FALSE
;
4830 PSECURITY_DESCRIPTOR psd
= NULL
;
4831 int is_a_symlink
= 0;
4832 DWORD file_flags
= FILE_FLAG_BACKUP_SEMANTICS
;
4833 DWORD access_rights
= 0;
4834 DWORD fattrs
= 0, serialnum
= 0, fs_high
= 0, fs_low
= 0, nlinks
= 1;
4835 FILETIME ctime
, atime
, wtime
;
4836 wchar_t name_w
[MAX_PATH
];
4837 char name_a
[MAX_PATH
];
4839 if (path
== NULL
|| buf
== NULL
)
4845 save_name
= name
= (char *) map_w32_filename (path
, &path
);
4846 /* Must be valid filename, no wild cards or other invalid
4848 if (strpbrk (name
, "*?|<>\""))
4854 len
= strlen (name
);
4855 /* Allocate 1 extra byte so that we could append a slash to a root
4856 directory, down below. */
4857 name
= strcpy (alloca (len
+ 2), name
);
4859 /* Avoid a somewhat costly call to is_symlink if the filesystem
4860 doesn't support symlinks. */
4861 if ((volume_info
.flags
& FILE_SUPPORTS_REPARSE_POINTS
) != 0)
4862 is_a_symlink
= is_symlink (name
);
4864 /* Plan A: Open the file and get all the necessary information via
4865 the resulting handle. This solves several issues in one blow:
4867 . retrieves attributes for the target of a symlink, if needed
4868 . gets attributes of root directories and symlinks pointing to
4869 root directories, thus avoiding the need for special-casing
4870 these and detecting them by examining the file-name format
4871 . retrieves more accurate attributes (e.g., non-zero size for
4872 some directories, esp. directories that are junction points)
4873 . correctly resolves "c:/..", "/.." and similar file names
4874 . avoids run-time penalties for 99% of use cases
4876 Plan A is always tried first, unless the user asked not to (but
4877 if the file is a symlink and we need to follow links, we try Plan
4878 A even if the user asked not to).
4880 If Plan A fails, we go to Plan B (below), where various
4881 potentially expensive techniques must be used to handle "special"
4882 files such as UNC volumes etc. */
4883 if (!(NILP (Vw32_get_true_file_attributes
)
4884 || (EQ (Vw32_get_true_file_attributes
, Qlocal
) && is_slow_fs (name
)))
4885 /* Following symlinks requires getting the info by handle. */
4886 || (is_a_symlink
&& follow_symlinks
))
4888 BY_HANDLE_FILE_INFORMATION info
;
4890 if (is_a_symlink
&& !follow_symlinks
)
4891 file_flags
|= FILE_FLAG_OPEN_REPARSE_POINT
;
4892 /* READ_CONTROL access rights are required to get security info
4893 by handle. But if the OS doesn't support security in the
4894 first place, we don't need to try. */
4895 if (is_windows_9x () != TRUE
)
4896 access_rights
|= READ_CONTROL
;
4898 if (w32_unicode_filenames
)
4900 filename_to_utf16 (name
, name_w
);
4901 fh
= CreateFileW (name_w
, access_rights
, 0, NULL
, OPEN_EXISTING
,
4903 /* If CreateFile fails with READ_CONTROL, try again with
4904 zero as access rights. */
4905 if (fh
== INVALID_HANDLE_VALUE
&& access_rights
)
4906 fh
= CreateFileW (name_w
, 0, 0, NULL
, OPEN_EXISTING
,
4911 filename_to_ansi (name
, name_a
);
4912 fh
= CreateFileA (name_a
, access_rights
, 0, NULL
, OPEN_EXISTING
,
4914 if (fh
== INVALID_HANDLE_VALUE
&& access_rights
)
4915 fh
= CreateFileA (name_a
, 0, 0, NULL
, OPEN_EXISTING
,
4918 if (fh
== INVALID_HANDLE_VALUE
)
4919 goto no_true_file_attributes
;
4921 /* This is more accurate in terms of getting the correct number
4922 of links, but is quite slow (it is noticeable when Emacs is
4923 making a list of file name completions). */
4924 if (GetFileInformationByHandle (fh
, &info
))
4926 nlinks
= info
.nNumberOfLinks
;
4927 /* Might as well use file index to fake inode values, but this
4928 is not guaranteed to be unique unless we keep a handle open
4929 all the time (even then there are situations where it is
4930 not unique). Reputedly, there are at most 48 bits of info
4931 (on NTFS, presumably less on FAT). */
4932 fake_inode
= info
.nFileIndexHigh
;
4934 fake_inode
+= info
.nFileIndexLow
;
4935 serialnum
= info
.dwVolumeSerialNumber
;
4936 fs_high
= info
.nFileSizeHigh
;
4937 fs_low
= info
.nFileSizeLow
;
4938 ctime
= info
.ftCreationTime
;
4939 atime
= info
.ftLastAccessTime
;
4940 wtime
= info
.ftLastWriteTime
;
4941 fattrs
= info
.dwFileAttributes
;
4945 /* We don't go to Plan B here, because it's not clear that
4946 it's a good idea. The only known use case where
4947 CreateFile succeeds, but GetFileInformationByHandle fails
4948 (with ERROR_INVALID_FUNCTION) is for character devices
4949 such as NUL, PRN, etc. For these, switching to Plan B is
4950 a net loss, because we lose the character device
4951 attribute returned by GetFileType below (FindFirstFile
4952 doesn't set that bit in the attributes), and the other
4953 fields don't make sense for character devices anyway.
4954 Emacs doesn't really care for non-file entities in the
4955 context of l?stat, so neither do we. */
4957 /* w32err is assigned so one could put a breakpoint here and
4958 examine its value, when GetFileInformationByHandle
4960 DWORD w32err
= GetLastError ();
4964 case ERROR_FILE_NOT_FOUND
: /* can this ever happen? */
4970 /* Test for a symlink before testing for a directory, since
4971 symlinks to directories have the directory bit set, but we
4972 don't want them to appear as directories. */
4973 if (is_a_symlink
&& !follow_symlinks
)
4974 buf
->st_mode
= S_IFLNK
;
4975 else if (fattrs
& FILE_ATTRIBUTE_DIRECTORY
)
4976 buf
->st_mode
= S_IFDIR
;
4979 DWORD ftype
= GetFileType (fh
);
4983 case FILE_TYPE_DISK
:
4984 buf
->st_mode
= S_IFREG
;
4986 case FILE_TYPE_PIPE
:
4987 buf
->st_mode
= S_IFIFO
;
4989 case FILE_TYPE_CHAR
:
4990 case FILE_TYPE_UNKNOWN
:
4992 buf
->st_mode
= S_IFCHR
;
4995 /* We produce the fallback owner and group data, based on the
4996 current user that runs Emacs, in the following cases:
4998 . caller didn't request owner and group info
4999 . this is Windows 9X
5000 . getting security by handle failed, and we need to produce
5001 information for the target of a symlink (this is better
5002 than producing a potentially misleading info about the
5005 If getting security by handle fails, and we don't need to
5006 resolve symlinks, we try getting security by name. */
5007 if (!w32_stat_get_owner_group
|| is_windows_9x () == TRUE
)
5008 get_file_owner_and_group (NULL
, buf
);
5011 psd
= get_file_security_desc_by_handle (fh
);
5014 get_file_owner_and_group (psd
, buf
);
5017 else if (!(is_a_symlink
&& follow_symlinks
))
5019 psd
= get_file_security_desc_by_name (name
);
5020 get_file_owner_and_group (psd
, buf
);
5024 get_file_owner_and_group (NULL
, buf
);
5030 no_true_file_attributes
:
5031 /* Plan B: Either getting a handle on the file failed, or the
5032 caller explicitly asked us to not bother making this
5033 information more accurate.
5035 Implementation note: In Plan B, we never bother to resolve
5036 symlinks, even if we got here because we tried Plan A and
5037 failed. That's because, even if the caller asked for extra
5038 precision by setting Vw32_get_true_file_attributes to t,
5039 resolving symlinks requires acquiring a file handle to the
5040 symlink, which we already know will fail. And if the user
5041 did not ask for extra precision, resolving symlinks will fly
5042 in the face of that request, since the user then wants the
5043 lightweight version of the code. */
5044 rootdir
= (path
>= save_name
+ len
- 1
5045 && (IS_DIRECTORY_SEP (*path
) || *path
== 0));
5047 /* If name is "c:/.." or "/.." then stat "c:/" or "/". */
5048 r
= IS_DEVICE_SEP (name
[1]) ? &name
[2] : name
;
5049 if (IS_DIRECTORY_SEP (r
[0])
5050 && r
[1] == '.' && r
[2] == '.' && r
[3] == '\0')
5053 /* Note: If NAME is a symlink to the root of a UNC volume
5054 (i.e. "\\SERVER"), we will not detect that here, and we will
5055 return data about the symlink as result of FindFirst below.
5056 This is unfortunate, but that marginal use case does not
5057 justify a call to chase_symlinks which would impose a penalty
5058 on all the other use cases. (We get here for symlinks to
5059 roots of UNC volumes because CreateFile above fails for them,
5060 unlike with symlinks to root directories X:\ of drives.) */
5061 if (is_unc_volume (name
))
5063 fattrs
= unc_volume_file_attributes (name
);
5067 ctime
= atime
= wtime
= utc_base_ft
;
5071 /* Make sure root directories end in a slash. */
5072 if (!IS_DIRECTORY_SEP (name
[len
-1]))
5073 strcpy (name
+ len
, "\\");
5074 if (GetDriveType (name
) < 2)
5080 fattrs
= FILE_ATTRIBUTE_DIRECTORY
;
5081 ctime
= atime
= wtime
= utc_base_ft
;
5087 /* Make sure non-root directories do NOT end in a slash,
5088 otherwise FindFirstFile might fail. */
5089 if (IS_DIRECTORY_SEP (name
[len
-1]))
5092 /* (This is hacky, but helps when doing file completions on
5093 network drives.) Optimize by using information available from
5094 active readdir if possible. */
5095 len
= strlen (dir_pathname
);
5096 if (IS_DIRECTORY_SEP (dir_pathname
[len
-1]))
5098 if (dir_find_handle
!= INVALID_HANDLE_VALUE
5099 && last_dir_find_data
!= -1
5100 && !(is_a_symlink
&& follow_symlinks
)
5101 /* The 2 file-name comparisons below support only ASCII
5102 characters, and will lose (compare not equal) when
5103 the file names include non-ASCII characters that are
5104 the same but for the case. However, doing this
5105 properly involves: (a) converting both file names to
5106 UTF-16, (b) lower-casing both names using CharLowerW,
5107 and (c) comparing the results; this would be quite a
5108 bit slower, whereas Plan B is for users who want
5109 lightweight albeit inaccurate version of 'stat'. */
5110 && c_strncasecmp (save_name
, dir_pathname
, len
) == 0
5111 && IS_DIRECTORY_SEP (name
[len
])
5112 && xstrcasecmp (name
+ len
+ 1, dir_static
.d_name
) == 0)
5114 have_wfd
= last_dir_find_data
;
5115 /* This was the last entry returned by readdir. */
5116 if (last_dir_find_data
== DIR_FIND_DATA_W
)
5117 wfd_w
= dir_find_data_w
;
5119 wfd_a
= dir_find_data_a
;
5123 logon_network_drive (name
);
5125 if (w32_unicode_filenames
)
5127 filename_to_utf16 (name
, name_w
);
5128 fh
= FindFirstFileW (name_w
, &wfd_w
);
5129 have_wfd
= DIR_FIND_DATA_W
;
5133 filename_to_ansi (name
, name_a
);
5134 /* If NAME includes characters not representable by
5135 the current ANSI codepage, filename_to_ansi
5136 usually replaces them with a '?'. We don't want
5137 to let FindFirstFileA interpret those as wildcards,
5138 and "succeed", returning us data from some random
5139 file in the same directory. */
5140 if (_mbspbrk (name_a
, "?"))
5141 fh
= INVALID_HANDLE_VALUE
;
5143 fh
= FindFirstFileA (name_a
, &wfd_a
);
5144 have_wfd
= DIR_FIND_DATA_A
;
5146 if (fh
== INVALID_HANDLE_VALUE
)
5153 /* Note: if NAME is a symlink, the information we get from
5154 FindFirstFile is for the symlink, not its target. */
5155 if (have_wfd
== DIR_FIND_DATA_W
)
5157 fattrs
= wfd_w
.dwFileAttributes
;
5158 ctime
= wfd_w
.ftCreationTime
;
5159 atime
= wfd_w
.ftLastAccessTime
;
5160 wtime
= wfd_w
.ftLastWriteTime
;
5161 fs_high
= wfd_w
.nFileSizeHigh
;
5162 fs_low
= wfd_w
.nFileSizeLow
;
5166 fattrs
= wfd_a
.dwFileAttributes
;
5167 ctime
= wfd_a
.ftCreationTime
;
5168 atime
= wfd_a
.ftLastAccessTime
;
5169 wtime
= wfd_a
.ftLastWriteTime
;
5170 fs_high
= wfd_a
.nFileSizeHigh
;
5171 fs_low
= wfd_a
.nFileSizeLow
;
5175 serialnum
= volume_info
.serialnum
;
5177 if (is_a_symlink
&& !follow_symlinks
)
5178 buf
->st_mode
= S_IFLNK
;
5179 else if (fattrs
& FILE_ATTRIBUTE_DIRECTORY
)
5180 buf
->st_mode
= S_IFDIR
;
5182 buf
->st_mode
= S_IFREG
;
5184 get_file_owner_and_group (NULL
, buf
);
5187 buf
->st_ino
= fake_inode
;
5189 buf
->st_dev
= serialnum
;
5190 buf
->st_rdev
= serialnum
;
5192 buf
->st_size
= fs_high
;
5193 buf
->st_size
<<= 32;
5194 buf
->st_size
+= fs_low
;
5195 buf
->st_nlink
= nlinks
;
5197 /* Convert timestamps to Unix format. */
5198 buf
->st_mtime
= convert_time (wtime
);
5199 buf
->st_atime
= convert_time (atime
);
5200 if (buf
->st_atime
== 0) buf
->st_atime
= buf
->st_mtime
;
5201 buf
->st_ctime
= convert_time (ctime
);
5202 if (buf
->st_ctime
== 0) buf
->st_ctime
= buf
->st_mtime
;
5204 /* determine rwx permissions */
5205 if (is_a_symlink
&& !follow_symlinks
)
5206 permission
= S_IREAD
| S_IWRITE
| S_IEXEC
; /* Posix expectations */
5209 if (fattrs
& FILE_ATTRIBUTE_READONLY
)
5210 permission
= S_IREAD
;
5212 permission
= S_IREAD
| S_IWRITE
;
5214 if (fattrs
& FILE_ATTRIBUTE_DIRECTORY
)
5215 permission
|= S_IEXEC
;
5216 else if (is_exec (name
))
5217 permission
|= S_IEXEC
;
5220 buf
->st_mode
|= permission
| (permission
>> 3) | (permission
>> 6);
5226 stat (const char * path
, struct stat
* buf
)
5228 return stat_worker (path
, buf
, 1);
5232 lstat (const char * path
, struct stat
* buf
)
5234 return stat_worker (path
, buf
, 0);
5238 fstatat (int fd
, char const *name
, struct stat
*st
, int flags
)
5240 /* Rely on a hack: an open directory is modeled as file descriptor 0.
5241 This is good enough for the current usage in Emacs, but is fragile.
5243 FIXME: Add proper support for fdopendir, fstatat, readlinkat.
5244 Gnulib does this and can serve as a model. */
5245 char fullname
[MAX_UTF8_PATH
];
5249 char lastc
= dir_pathname
[strlen (dir_pathname
) - 1];
5251 if (_snprintf (fullname
, sizeof fullname
, "%s%s%s",
5252 dir_pathname
, IS_DIRECTORY_SEP (lastc
) ? "" : "/", name
)
5255 errno
= ENAMETOOLONG
;
5261 return stat_worker (name
, st
, ! (flags
& AT_SYMLINK_NOFOLLOW
));
5264 /* Provide fstat and utime as well as stat for consistent handling of
5267 fstat (int desc
, struct stat
* buf
)
5269 HANDLE fh
= (HANDLE
) _get_osfhandle (desc
);
5270 BY_HANDLE_FILE_INFORMATION info
;
5271 unsigned __int64 fake_inode
;
5274 switch (GetFileType (fh
) & ~FILE_TYPE_REMOTE
)
5276 case FILE_TYPE_DISK
:
5277 buf
->st_mode
= S_IFREG
;
5278 if (!GetFileInformationByHandle (fh
, &info
))
5284 case FILE_TYPE_PIPE
:
5285 buf
->st_mode
= S_IFIFO
;
5287 case FILE_TYPE_CHAR
:
5288 case FILE_TYPE_UNKNOWN
:
5290 buf
->st_mode
= S_IFCHR
;
5292 memset (&info
, 0, sizeof (info
));
5293 info
.dwFileAttributes
= 0;
5294 info
.ftCreationTime
= utc_base_ft
;
5295 info
.ftLastAccessTime
= utc_base_ft
;
5296 info
.ftLastWriteTime
= utc_base_ft
;
5299 if (info
.dwFileAttributes
& FILE_ATTRIBUTE_DIRECTORY
)
5300 buf
->st_mode
= S_IFDIR
;
5302 buf
->st_nlink
= info
.nNumberOfLinks
;
5303 /* Might as well use file index to fake inode values, but this
5304 is not guaranteed to be unique unless we keep a handle open
5305 all the time (even then there are situations where it is
5306 not unique). Reputedly, there are at most 48 bits of info
5307 (on NTFS, presumably less on FAT). */
5308 fake_inode
= info
.nFileIndexHigh
;
5310 fake_inode
+= info
.nFileIndexLow
;
5312 /* MSVC defines _ino_t to be short; other libc's might not. */
5313 if (sizeof (buf
->st_ino
) == 2)
5314 buf
->st_ino
= fake_inode
^ (fake_inode
>> 16);
5316 buf
->st_ino
= fake_inode
;
5318 /* If the caller so requested, get the true file owner and group.
5319 Otherwise, consider the file to belong to the current user. */
5320 if (!w32_stat_get_owner_group
|| is_windows_9x () == TRUE
)
5321 get_file_owner_and_group (NULL
, buf
);
5324 PSECURITY_DESCRIPTOR psd
= NULL
;
5326 psd
= get_file_security_desc_by_handle (fh
);
5329 get_file_owner_and_group (psd
, buf
);
5333 get_file_owner_and_group (NULL
, buf
);
5336 buf
->st_dev
= info
.dwVolumeSerialNumber
;
5337 buf
->st_rdev
= info
.dwVolumeSerialNumber
;
5339 buf
->st_size
= info
.nFileSizeHigh
;
5340 buf
->st_size
<<= 32;
5341 buf
->st_size
+= info
.nFileSizeLow
;
5343 /* Convert timestamps to Unix format. */
5344 buf
->st_mtime
= convert_time (info
.ftLastWriteTime
);
5345 buf
->st_atime
= convert_time (info
.ftLastAccessTime
);
5346 if (buf
->st_atime
== 0) buf
->st_atime
= buf
->st_mtime
;
5347 buf
->st_ctime
= convert_time (info
.ftCreationTime
);
5348 if (buf
->st_ctime
== 0) buf
->st_ctime
= buf
->st_mtime
;
5350 /* determine rwx permissions */
5351 if (info
.dwFileAttributes
& FILE_ATTRIBUTE_READONLY
)
5352 permission
= S_IREAD
;
5354 permission
= S_IREAD
| S_IWRITE
;
5356 if (info
.dwFileAttributes
& FILE_ATTRIBUTE_DIRECTORY
)
5357 permission
|= S_IEXEC
;
5360 #if 0 /* no way of knowing the filename */
5361 char * p
= strrchr (name
, '.');
5363 (xstrcasecmp (p
, ".exe") == 0 ||
5364 xstrcasecmp (p
, ".com") == 0 ||
5365 xstrcasecmp (p
, ".bat") == 0 ||
5366 xstrcasecmp (p
, ".cmd") == 0))
5367 permission
|= S_IEXEC
;
5371 buf
->st_mode
|= permission
| (permission
>> 3) | (permission
>> 6);
5376 /* A version of 'utime' which handles directories as well as
5380 utime (const char *name
, struct utimbuf
*times
)
5382 struct utimbuf deftime
;
5389 deftime
.modtime
= deftime
.actime
= time (NULL
);
5393 if (w32_unicode_filenames
)
5395 wchar_t name_utf16
[MAX_PATH
];
5397 if (filename_to_utf16 (name
, name_utf16
) != 0)
5398 return -1; /* errno set by filename_to_utf16 */
5400 /* Need write access to set times. */
5401 fh
= CreateFileW (name_utf16
, FILE_WRITE_ATTRIBUTES
,
5402 /* If NAME specifies a directory, FILE_SHARE_DELETE
5403 allows other processes to delete files inside it,
5404 while we have the directory open. */
5405 FILE_SHARE_READ
| FILE_SHARE_WRITE
| FILE_SHARE_DELETE
,
5406 0, OPEN_EXISTING
, FILE_FLAG_BACKUP_SEMANTICS
, NULL
);
5410 char name_ansi
[MAX_PATH
];
5412 if (filename_to_ansi (name
, name_ansi
) != 0)
5413 return -1; /* errno set by filename_to_ansi */
5415 fh
= CreateFileA (name_ansi
, FILE_WRITE_ATTRIBUTES
,
5416 FILE_SHARE_READ
| FILE_SHARE_WRITE
| FILE_SHARE_DELETE
,
5417 0, OPEN_EXISTING
, FILE_FLAG_BACKUP_SEMANTICS
, NULL
);
5419 if (fh
!= INVALID_HANDLE_VALUE
)
5421 convert_from_time_t (times
->actime
, &atime
);
5422 convert_from_time_t (times
->modtime
, &mtime
);
5423 if (!SetFileTime (fh
, NULL
, &atime
, &mtime
))
5433 DWORD err
= GetLastError ();
5437 case ERROR_FILE_NOT_FOUND
:
5438 case ERROR_PATH_NOT_FOUND
:
5439 case ERROR_INVALID_DRIVE
:
5440 case ERROR_BAD_NETPATH
:
5441 case ERROR_DEV_NOT_EXIST
:
5442 /* ERROR_INVALID_NAME is the error CreateFile sets when the
5443 file name includes ?s, i.e. translation to ANSI failed. */
5444 case ERROR_INVALID_NAME
:
5447 case ERROR_TOO_MANY_OPEN_FILES
:
5450 case ERROR_ACCESS_DENIED
:
5451 case ERROR_SHARING_VIOLATION
:
5464 sys_umask (int mode
)
5466 static int current_mask
;
5467 int retval
, arg
= 0;
5469 /* The only bit we really support is the write bit. Files are
5470 always readable on MS-Windows, and the execute bit does not exist
5472 /* FIXME: if the GROUP and OTHER bits are reset, we should use ACLs
5473 to prevent access by other users on NTFS. */
5474 if ((mode
& S_IWRITE
) != 0)
5477 retval
= _umask (arg
);
5478 /* Merge into the return value the bits they've set the last time,
5479 which msvcrt.dll ignores and never returns. Emacs insists on its
5480 notion of mask being identical to what we return. */
5481 retval
|= (current_mask
& ~S_IWRITE
);
5482 current_mask
= mode
;
5488 /* Symlink-related functions. */
5489 #ifndef SYMBOLIC_LINK_FLAG_DIRECTORY
5490 #define SYMBOLIC_LINK_FLAG_DIRECTORY 0x1
5494 symlink (char const *filename
, char const *linkname
)
5496 char linkfn
[MAX_UTF8_PATH
], *tgtfn
;
5498 int dir_access
, filename_ends_in_slash
;
5500 /* Diagnostics follows Posix as much as possible. */
5501 if (filename
== NULL
|| linkname
== NULL
)
5511 if (strlen (filename
) > MAX_UTF8_PATH
|| strlen (linkname
) > MAX_UTF8_PATH
)
5513 errno
= ENAMETOOLONG
;
5517 strcpy (linkfn
, map_w32_filename (linkname
, NULL
));
5518 if ((volume_info
.flags
& FILE_SUPPORTS_REPARSE_POINTS
) == 0)
5524 /* Note: since empty FILENAME was already rejected, we can safely
5525 refer to FILENAME[1]. */
5526 if (!(IS_DIRECTORY_SEP (filename
[0]) || IS_DEVICE_SEP (filename
[1])))
5528 /* Non-absolute FILENAME is understood as being relative to
5529 LINKNAME's directory. We need to prepend that directory to
5530 FILENAME to get correct results from faccessat below, since
5531 otherwise it will interpret FILENAME relative to the
5532 directory where the Emacs process runs. Note that
5533 make-symbolic-link always makes sure LINKNAME is a fully
5534 expanded file name. */
5535 char tem
[MAX_UTF8_PATH
];
5536 char *p
= linkfn
+ strlen (linkfn
);
5538 while (p
> linkfn
&& !IS_ANY_SEP (p
[-1]))
5541 strncpy (tem
, linkfn
, p
- linkfn
);
5542 strcpy (tem
+ (p
- linkfn
), filename
);
5543 dir_access
= faccessat (AT_FDCWD
, tem
, D_OK
, AT_EACCESS
);
5546 dir_access
= faccessat (AT_FDCWD
, filename
, D_OK
, AT_EACCESS
);
5548 /* Since Windows distinguishes between symlinks to directories and
5549 to files, we provide a kludgy feature: if FILENAME doesn't
5550 exist, but ends in a slash, we create a symlink to directory. If
5551 FILENAME exists and is a directory, we always create a symlink to
5553 filename_ends_in_slash
= IS_DIRECTORY_SEP (filename
[strlen (filename
) - 1]);
5554 if (dir_access
== 0 || filename_ends_in_slash
)
5555 flags
= SYMBOLIC_LINK_FLAG_DIRECTORY
;
5557 tgtfn
= (char *)map_w32_filename (filename
, NULL
);
5558 if (filename_ends_in_slash
)
5559 tgtfn
[strlen (tgtfn
) - 1] = '\0';
5562 if (!create_symbolic_link (linkfn
, tgtfn
, flags
))
5564 /* ENOSYS is set by create_symbolic_link, when it detects that
5565 the OS doesn't support the CreateSymbolicLink API. */
5566 if (errno
!= ENOSYS
)
5568 DWORD w32err
= GetLastError ();
5572 /* ERROR_SUCCESS is sometimes returned when LINKFN and
5573 TGTFN point to the same file name, go figure. */
5575 case ERROR_FILE_EXISTS
:
5578 case ERROR_ACCESS_DENIED
:
5581 case ERROR_FILE_NOT_FOUND
:
5582 case ERROR_PATH_NOT_FOUND
:
5583 case ERROR_BAD_NETPATH
:
5584 case ERROR_INVALID_REPARSE_DATA
:
5587 case ERROR_DIRECTORY
:
5590 case ERROR_PRIVILEGE_NOT_HELD
:
5591 case ERROR_NOT_ALL_ASSIGNED
:
5594 case ERROR_DISK_FULL
:
5607 /* A quick inexpensive test of whether FILENAME identifies a file that
5608 is a symlink. Returns non-zero if it is, zero otherwise. FILENAME
5609 must already be in the normalized form returned by
5612 Note: for repeated operations on many files, it is best to test
5613 whether the underlying volume actually supports symlinks, by
5614 testing the FILE_SUPPORTS_REPARSE_POINTS bit in volume's flags, and
5615 avoid the call to this function if it doesn't. That's because the
5616 call to GetFileAttributes takes a non-negligible time, especially
5617 on non-local or removable filesystems. See stat_worker for an
5618 example of how to do that. */
5620 is_symlink (const char *filename
)
5623 wchar_t filename_w
[MAX_PATH
];
5624 char filename_a
[MAX_PATH
];
5625 WIN32_FIND_DATAW wfdw
;
5626 WIN32_FIND_DATAA wfda
;
5628 int attrs_mean_symlink
;
5630 if (w32_unicode_filenames
)
5632 filename_to_utf16 (filename
, filename_w
);
5633 attrs
= GetFileAttributesW (filename_w
);
5637 filename_to_ansi (filename
, filename_a
);
5638 attrs
= GetFileAttributesA (filename_a
);
5642 DWORD w32err
= GetLastError ();
5646 case ERROR_BAD_NETPATH
: /* network share, can't be a symlink */
5648 case ERROR_ACCESS_DENIED
:
5651 case ERROR_FILE_NOT_FOUND
:
5652 case ERROR_PATH_NOT_FOUND
:
5659 if ((attrs
& FILE_ATTRIBUTE_REPARSE_POINT
) == 0)
5661 logon_network_drive (filename
);
5662 if (w32_unicode_filenames
)
5664 fh
= FindFirstFileW (filename_w
, &wfdw
);
5665 attrs_mean_symlink
=
5666 (wfdw
.dwFileAttributes
& FILE_ATTRIBUTE_REPARSE_POINT
) != 0
5667 && (wfdw
.dwReserved0
& IO_REPARSE_TAG_SYMLINK
) == IO_REPARSE_TAG_SYMLINK
;
5669 else if (_mbspbrk (filename_a
, "?"))
5671 /* filename_to_ansi failed to convert the file name. */
5677 fh
= FindFirstFileA (filename_a
, &wfda
);
5678 attrs_mean_symlink
=
5679 (wfda
.dwFileAttributes
& FILE_ATTRIBUTE_REPARSE_POINT
) != 0
5680 && (wfda
.dwReserved0
& IO_REPARSE_TAG_SYMLINK
) == IO_REPARSE_TAG_SYMLINK
;
5682 if (fh
== INVALID_HANDLE_VALUE
)
5685 return attrs_mean_symlink
;
5688 /* If NAME identifies a symbolic link, copy into BUF the file name of
5689 the symlink's target. Copy at most BUF_SIZE bytes, and do NOT
5690 null-terminate the target name, even if it fits. Return the number
5691 of bytes copied, or -1 if NAME is not a symlink or any error was
5692 encountered while resolving it. The file name copied into BUF is
5693 encoded in the current ANSI codepage. */
5695 readlink (const char *name
, char *buf
, size_t buf_size
)
5698 TOKEN_PRIVILEGES privs
;
5699 int restore_privs
= 0;
5702 char resolved
[MAX_UTF8_PATH
];
5715 path
= map_w32_filename (name
, NULL
);
5717 if (strlen (path
) > MAX_UTF8_PATH
)
5719 errno
= ENAMETOOLONG
;
5724 if (is_windows_9x () == TRUE
5725 || (volume_info
.flags
& FILE_SUPPORTS_REPARSE_POINTS
) == 0
5726 || !is_symlink (path
))
5729 errno
= EINVAL
; /* not a symlink */
5733 /* Done with simple tests, now we're in for some _real_ work. */
5734 if (enable_privilege (SE_BACKUP_NAME
, TRUE
, &privs
))
5736 /* Implementation note: From here and onward, don't return early,
5737 since that will fail to restore the original set of privileges of
5738 the calling thread. */
5740 retval
= -1; /* not too optimistic, are we? */
5742 /* Note: In the next call to CreateFile, we use zero as the 2nd
5743 argument because, when the symlink is a hidden/system file,
5744 e.g. 'C:\Users\All Users', GENERIC_READ fails with
5745 ERROR_ACCESS_DENIED. Zero seems to work just fine, both for file
5746 and directory symlinks. */
5747 if (w32_unicode_filenames
)
5749 wchar_t path_w
[MAX_PATH
];
5751 filename_to_utf16 (path
, path_w
);
5752 sh
= CreateFileW (path_w
, 0, 0, NULL
, OPEN_EXISTING
,
5753 FILE_FLAG_OPEN_REPARSE_POINT
5754 | FILE_FLAG_BACKUP_SEMANTICS
,
5759 char path_a
[MAX_PATH
];
5761 filename_to_ansi (path
, path_a
);
5762 sh
= CreateFileA (path_a
, 0, 0, NULL
, OPEN_EXISTING
,
5763 FILE_FLAG_OPEN_REPARSE_POINT
5764 | FILE_FLAG_BACKUP_SEMANTICS
,
5767 if (sh
!= INVALID_HANDLE_VALUE
)
5769 BYTE reparse_buf
[MAXIMUM_REPARSE_DATA_BUFFER_SIZE
];
5770 REPARSE_DATA_BUFFER
*reparse_data
= (REPARSE_DATA_BUFFER
*)&reparse_buf
[0];
5773 if (!DeviceIoControl (sh
, FSCTL_GET_REPARSE_POINT
, NULL
, 0,
5774 reparse_buf
, MAXIMUM_REPARSE_DATA_BUFFER_SIZE
,
5777 else if (reparse_data
->ReparseTag
!= IO_REPARSE_TAG_SYMLINK
)
5781 /* Copy the link target name, in wide characters, from
5782 reparse_data, then convert it to multibyte encoding in
5783 the current locale's codepage. */
5787 reparse_data
->SymbolicLinkReparseBuffer
.PrintNameLength
;
5789 reparse_data
->SymbolicLinkReparseBuffer
.PathBuffer
5790 + reparse_data
->SymbolicLinkReparseBuffer
.PrintNameOffset
/sizeof(WCHAR
);
5791 size_t size_to_copy
= buf_size
;
5793 /* According to MSDN, PrintNameLength does not include the
5794 terminating null character. */
5795 lwname
= alloca ((lwname_len
+ 1) * sizeof(WCHAR
));
5796 memcpy (lwname
, lwname_src
, lwname_len
);
5797 lwname
[lwname_len
/sizeof(WCHAR
)] = 0; /* null-terminate */
5798 filename_from_utf16 (lwname
, resolved
);
5799 dostounix_filename (resolved
);
5800 lname_size
= strlen (resolved
) + 1;
5801 if (lname_size
<= buf_size
)
5802 size_to_copy
= lname_size
;
5803 strncpy (buf
, resolved
, size_to_copy
);
5805 retval
= size_to_copy
;
5811 /* CreateFile failed. */
5812 DWORD w32err2
= GetLastError ();
5816 case ERROR_FILE_NOT_FOUND
:
5817 case ERROR_PATH_NOT_FOUND
:
5820 case ERROR_ACCESS_DENIED
:
5821 case ERROR_TOO_MANY_OPEN_FILES
:
5831 restore_privilege (&privs
);
5839 readlinkat (int fd
, char const *name
, char *buffer
,
5842 /* Rely on a hack: an open directory is modeled as file descriptor 0,
5843 as in fstatat. FIXME: Add proper support for readlinkat. */
5844 char fullname
[MAX_UTF8_PATH
];
5848 if (_snprintf (fullname
, sizeof fullname
, "%s/%s", dir_pathname
, name
)
5851 errno
= ENAMETOOLONG
;
5857 return readlink (name
, buffer
, buffer_size
);
5860 /* If FILE is a symlink, return its target (stored in a static
5861 buffer); otherwise return FILE.
5863 This function repeatedly resolves symlinks in the last component of
5864 a chain of symlink file names, as in foo -> bar -> baz -> ...,
5865 until it arrives at a file whose last component is not a symlink,
5866 or some error occurs. It returns the target of the last
5867 successfully resolved symlink in the chain. If it succeeds to
5868 resolve even a single symlink, the value returned is an absolute
5869 file name with backslashes (result of GetFullPathName). By
5870 contrast, if the original FILE is returned, it is unaltered.
5872 Note: This function can set errno even if it succeeds.
5874 Implementation note: we only resolve the last portion ("basename")
5875 of the argument FILE and of each following file in the chain,
5876 disregarding any possible symlinks in its leading directories.
5877 This is because Windows system calls and library functions
5878 transparently resolve symlinks in leading directories and return
5879 correct information, as long as the basename is not a symlink. */
5881 chase_symlinks (const char *file
)
5883 static char target
[MAX_UTF8_PATH
];
5884 char link
[MAX_UTF8_PATH
];
5885 wchar_t target_w
[MAX_PATH
], link_w
[MAX_PATH
];
5886 char target_a
[MAX_PATH
], link_a
[MAX_PATH
];
5887 ssize_t res
, link_len
;
5890 if (is_windows_9x () == TRUE
|| !is_symlink (file
))
5891 return (char *)file
;
5893 if (w32_unicode_filenames
)
5895 wchar_t file_w
[MAX_PATH
];
5897 filename_to_utf16 (file
, file_w
);
5898 if (GetFullPathNameW (file_w
, MAX_PATH
, link_w
, NULL
) == 0)
5899 return (char *)file
;
5900 filename_from_utf16 (link_w
, link
);
5904 char file_a
[MAX_PATH
];
5906 filename_to_ansi (file
, file_a
);
5907 if (GetFullPathNameA (file_a
, MAX_PATH
, link_a
, NULL
) == 0)
5908 return (char *)file
;
5909 filename_from_ansi (link_a
, link
);
5911 link_len
= strlen (link
);
5916 /* Remove trailing slashes, as we want to resolve the last
5917 non-trivial part of the link name. */
5918 while (link_len
> 3 && IS_DIRECTORY_SEP (link
[link_len
-1]))
5919 link
[link_len
--] = '\0';
5921 res
= readlink (link
, target
, MAX_UTF8_PATH
);
5925 if (!(IS_DEVICE_SEP (target
[1])
5926 || (IS_DIRECTORY_SEP (target
[0]) && IS_DIRECTORY_SEP (target
[1]))))
5928 /* Target is relative. Append it to the directory part of
5929 the symlink, then copy the result back to target. */
5930 char *p
= link
+ link_len
;
5932 while (p
> link
&& !IS_ANY_SEP (p
[-1]))
5935 strcpy (target
, link
);
5937 /* Resolve any "." and ".." to get a fully-qualified file name
5939 if (w32_unicode_filenames
)
5941 filename_to_utf16 (target
, target_w
);
5942 link_len
= GetFullPathNameW (target_w
, MAX_PATH
, link_w
, NULL
);
5944 filename_from_utf16 (link_w
, link
);
5948 filename_to_ansi (target
, target_a
);
5949 link_len
= GetFullPathNameA (target_a
, MAX_PATH
, link_a
, NULL
);
5951 filename_from_ansi (link_a
, link
);
5953 link_len
= strlen (link
);
5955 } while (res
> 0 && link_len
> 0 && ++loop_count
<= 100);
5957 if (loop_count
> 100)
5960 if (target
[0] == '\0') /* not a single call to readlink succeeded */
5961 return (char *)file
;
5966 /* Posix ACL emulation. */
5969 acl_valid (acl_t acl
)
5971 return is_valid_security_descriptor ((PSECURITY_DESCRIPTOR
)acl
) ? 0 : -1;
5975 acl_to_text (acl_t acl
, ssize_t
*size
)
5978 SECURITY_INFORMATION flags
=
5979 OWNER_SECURITY_INFORMATION
|
5980 GROUP_SECURITY_INFORMATION
|
5981 DACL_SECURITY_INFORMATION
;
5982 char *retval
= NULL
;
5988 if (convert_sd_to_sddl ((PSECURITY_DESCRIPTOR
)acl
, SDDL_REVISION_1
, flags
, &str_acl
, &local_size
))
5991 /* We don't want to mix heaps, so we duplicate the string in our
5992 heap and free the one allocated by the API. */
5993 retval
= xstrdup (str_acl
);
5996 LocalFree (str_acl
);
5998 else if (errno
!= ENOTSUP
)
6005 acl_from_text (const char *acl_str
)
6007 PSECURITY_DESCRIPTOR psd
, retval
= NULL
;
6013 if (convert_sddl_to_sd (acl_str
, SDDL_REVISION_1
, &psd
, &sd_size
))
6016 retval
= xmalloc (sd_size
);
6017 memcpy (retval
, psd
, sd_size
);
6020 else if (errno
!= ENOTSUP
)
6027 acl_free (void *ptr
)
6034 acl_get_file (const char *fname
, acl_type_t type
)
6036 PSECURITY_DESCRIPTOR psd
= NULL
;
6037 const char *filename
;
6039 if (type
== ACL_TYPE_ACCESS
)
6042 SECURITY_INFORMATION si
=
6043 OWNER_SECURITY_INFORMATION
|
6044 GROUP_SECURITY_INFORMATION
|
6045 DACL_SECURITY_INFORMATION
;
6048 filename
= map_w32_filename (fname
, NULL
);
6049 if ((volume_info
.flags
& FILE_SUPPORTS_REPARSE_POINTS
) != 0)
6050 fname
= chase_symlinks (filename
);
6055 if (!get_file_security (fname
, si
, psd
, 0, &sd_len
)
6056 && errno
!= ENOTSUP
)
6058 err
= GetLastError ();
6059 if (err
== ERROR_INSUFFICIENT_BUFFER
)
6061 psd
= xmalloc (sd_len
);
6062 if (!get_file_security (fname
, si
, psd
, sd_len
, &sd_len
))
6069 else if (err
== ERROR_FILE_NOT_FOUND
6070 || err
== ERROR_PATH_NOT_FOUND
6071 /* ERROR_INVALID_NAME is what we get if
6072 w32-unicode-filenames is nil and the file cannot
6073 be encoded in the current ANSI codepage. */
6074 || err
== ERROR_INVALID_NAME
)
6082 else if (type
!= ACL_TYPE_DEFAULT
)
6089 acl_set_file (const char *fname
, acl_type_t type
, acl_t acl
)
6091 TOKEN_PRIVILEGES old1
, old2
;
6093 int st
= 0, retval
= -1;
6094 SECURITY_INFORMATION flags
= 0;
6095 PSID psidOwner
, psidGroup
;
6100 const char *filename
;
6102 if (acl_valid (acl
) != 0
6103 || (type
!= ACL_TYPE_DEFAULT
&& type
!= ACL_TYPE_ACCESS
))
6109 if (type
== ACL_TYPE_DEFAULT
)
6115 filename
= map_w32_filename (fname
, NULL
);
6116 if ((volume_info
.flags
& FILE_SUPPORTS_REPARSE_POINTS
) != 0)
6117 fname
= chase_symlinks (filename
);
6121 if (get_security_descriptor_owner ((PSECURITY_DESCRIPTOR
)acl
, &psidOwner
,
6124 flags
|= OWNER_SECURITY_INFORMATION
;
6125 if (get_security_descriptor_group ((PSECURITY_DESCRIPTOR
)acl
, &psidGroup
,
6128 flags
|= GROUP_SECURITY_INFORMATION
;
6129 if (get_security_descriptor_dacl ((PSECURITY_DESCRIPTOR
)acl
, &dacl_present
,
6132 flags
|= DACL_SECURITY_INFORMATION
;
6136 /* According to KB-245153, setting the owner will succeed if either:
6137 (1) the caller is the user who will be the new owner, and has the
6138 SE_TAKE_OWNERSHIP privilege, or
6139 (2) the caller has the SE_RESTORE privilege, in which case she can
6140 set any valid user or group as the owner
6142 We request below both SE_TAKE_OWNERSHIP and SE_RESTORE
6143 privileges, and disregard any failures in obtaining them. If
6144 these privileges cannot be obtained, and do not already exist in
6145 the calling thread's security token, this function could fail
6147 if (enable_privilege (SE_TAKE_OWNERSHIP_NAME
, TRUE
, &old1
))
6149 if (enable_privilege (SE_RESTORE_NAME
, TRUE
, &old2
))
6154 /* SetFileSecurity is deprecated by MS, and sometimes fails when
6155 DACL inheritance is involved, but it seems to preserve ownership
6156 better than SetNamedSecurityInfo, which is important e.g., in
6158 if (!set_file_security (fname
, flags
, (PSECURITY_DESCRIPTOR
)acl
))
6160 err
= GetLastError ();
6162 if (errno
!= ENOTSUP
)
6163 err
= set_named_security_info (fname
, SE_FILE_OBJECT
, flags
,
6164 psidOwner
, psidGroup
, pacl
, NULL
);
6167 err
= ERROR_SUCCESS
;
6168 if (err
!= ERROR_SUCCESS
)
6170 if (errno
== ENOTSUP
)
6172 else if (err
== ERROR_INVALID_OWNER
6173 || err
== ERROR_NOT_ALL_ASSIGNED
6174 || err
== ERROR_ACCESS_DENIED
)
6176 /* Maybe the requested ACL and the one the file already has
6177 are identical, in which case we can silently ignore the
6178 failure. (And no, Windows doesn't.) */
6179 acl_t current_acl
= acl_get_file (fname
, ACL_TYPE_ACCESS
);
6184 char *acl_from
= acl_to_text (current_acl
, NULL
);
6185 char *acl_to
= acl_to_text (acl
, NULL
);
6187 if (acl_from
&& acl_to
&& xstrcasecmp (acl_from
, acl_to
) == 0)
6193 acl_free (acl_from
);
6196 acl_free (current_acl
);
6199 else if (err
== ERROR_FILE_NOT_FOUND
6200 || err
== ERROR_PATH_NOT_FOUND
6201 /* ERROR_INVALID_NAME is what we get if
6202 w32-unicode-filenames is nil and the file cannot be
6203 encoded in the current ANSI codepage. */
6204 || err
== ERROR_INVALID_NAME
)
6218 restore_privilege (&old2
);
6219 restore_privilege (&old1
);
6227 /* MS-Windows version of careadlinkat (cf. ../lib/careadlinkat.c). We
6228 have a fixed max size for file names, so we don't need the kind of
6229 alloc/malloc/realloc dance the gnulib version does. We also don't
6230 support FD-relative symlinks. */
6232 careadlinkat (int fd
, char const *filename
,
6233 char *buffer
, size_t buffer_size
,
6234 struct allocator
const *alloc
,
6235 ssize_t (*preadlinkat
) (int, char const *, char *, size_t))
6237 char linkname
[MAX_UTF8_PATH
];
6240 link_size
= preadlinkat (fd
, filename
, linkname
, sizeof(linkname
));
6244 char *retval
= buffer
;
6246 linkname
[link_size
++] = '\0';
6247 if (link_size
> buffer_size
)
6248 retval
= (char *)(alloc
? alloc
->allocate
: xmalloc
) (link_size
);
6250 memcpy (retval
, linkname
, link_size
);
6258 w32_copy_file (const char *from
, const char *to
,
6259 int keep_time
, int preserve_ownership
, int copy_acls
)
6263 wchar_t from_w
[MAX_PATH
], to_w
[MAX_PATH
];
6264 char from_a
[MAX_PATH
], to_a
[MAX_PATH
];
6266 /* We ignore preserve_ownership for now. */
6267 preserve_ownership
= preserve_ownership
;
6271 acl
= acl_get_file (from
, ACL_TYPE_ACCESS
);
6272 if (acl
== NULL
&& acl_errno_valid (errno
))
6275 if (w32_unicode_filenames
)
6277 filename_to_utf16 (from
, from_w
);
6278 filename_to_utf16 (to
, to_w
);
6279 copy_result
= CopyFileW (from_w
, to_w
, FALSE
);
6283 filename_to_ansi (from
, from_a
);
6284 filename_to_ansi (to
, to_a
);
6285 copy_result
= CopyFileA (from_a
, to_a
, FALSE
);
6289 /* CopyFile doesn't set errno when it fails. By far the most
6290 "popular" reason is that the target is read-only. */
6291 DWORD err
= GetLastError ();
6295 case ERROR_FILE_NOT_FOUND
:
6298 case ERROR_ACCESS_DENIED
:
6301 case ERROR_ENCRYPTION_FAILED
:
6313 /* CopyFile retains the timestamp by default. However, see
6314 "Community Additions" for CopyFile: it sounds like that is not
6315 entirely true. Testing on Windows XP confirms that modified time
6316 is copied, but creation and last-access times are not.
6318 else if (!keep_time
)
6320 struct timespec now
;
6323 if (w32_unicode_filenames
)
6325 /* Ensure file is writable while its times are set. */
6326 attributes
= GetFileAttributesW (to_w
);
6327 SetFileAttributesW (to_w
, attributes
& ~FILE_ATTRIBUTE_READONLY
);
6328 now
= current_timespec ();
6329 if (set_file_times (-1, to
, now
, now
))
6331 /* Restore original attributes. */
6332 SetFileAttributesW (to_w
, attributes
);
6337 /* Restore original attributes. */
6338 SetFileAttributesW (to_w
, attributes
);
6342 attributes
= GetFileAttributesA (to_a
);
6343 SetFileAttributesA (to_a
, attributes
& ~FILE_ATTRIBUTE_READONLY
);
6344 now
= current_timespec ();
6345 if (set_file_times (-1, to
, now
, now
))
6347 SetFileAttributesA (to_a
, attributes
);
6352 SetFileAttributesA (to_a
, attributes
);
6358 acl_set_file (to
, ACL_TYPE_ACCESS
, acl
) != 0;
6360 if (fail
&& acl_errno_valid (errno
))
6368 /* Support for browsing other processes and their attributes. See
6369 process.c for the Lisp bindings. */
6371 /* Helper wrapper functions. */
6373 static HANDLE WINAPI
6374 create_toolhelp32_snapshot (DWORD Flags
, DWORD Ignored
)
6376 static CreateToolhelp32Snapshot_Proc s_pfn_Create_Toolhelp32_Snapshot
= NULL
;
6378 if (g_b_init_create_toolhelp32_snapshot
== 0)
6380 g_b_init_create_toolhelp32_snapshot
= 1;
6381 s_pfn_Create_Toolhelp32_Snapshot
= (CreateToolhelp32Snapshot_Proc
)
6382 GetProcAddress (GetModuleHandle ("kernel32.dll"),
6383 "CreateToolhelp32Snapshot");
6385 if (s_pfn_Create_Toolhelp32_Snapshot
== NULL
)
6387 return INVALID_HANDLE_VALUE
;
6389 return (s_pfn_Create_Toolhelp32_Snapshot (Flags
, Ignored
));
6393 process32_first (HANDLE hSnapshot
, LPPROCESSENTRY32 lppe
)
6395 static Process32First_Proc s_pfn_Process32_First
= NULL
;
6397 if (g_b_init_process32_first
== 0)
6399 g_b_init_process32_first
= 1;
6400 s_pfn_Process32_First
= (Process32First_Proc
)
6401 GetProcAddress (GetModuleHandle ("kernel32.dll"),
6404 if (s_pfn_Process32_First
== NULL
)
6408 return (s_pfn_Process32_First (hSnapshot
, lppe
));
6412 process32_next (HANDLE hSnapshot
, LPPROCESSENTRY32 lppe
)
6414 static Process32Next_Proc s_pfn_Process32_Next
= NULL
;
6416 if (g_b_init_process32_next
== 0)
6418 g_b_init_process32_next
= 1;
6419 s_pfn_Process32_Next
= (Process32Next_Proc
)
6420 GetProcAddress (GetModuleHandle ("kernel32.dll"),
6423 if (s_pfn_Process32_Next
== NULL
)
6427 return (s_pfn_Process32_Next (hSnapshot
, lppe
));
6431 open_thread_token (HANDLE ThreadHandle
,
6432 DWORD DesiredAccess
,
6434 PHANDLE TokenHandle
)
6436 static OpenThreadToken_Proc s_pfn_Open_Thread_Token
= NULL
;
6437 HMODULE hm_advapi32
= NULL
;
6438 if (is_windows_9x () == TRUE
)
6440 SetLastError (ERROR_NOT_SUPPORTED
);
6443 if (g_b_init_open_thread_token
== 0)
6445 g_b_init_open_thread_token
= 1;
6446 hm_advapi32
= LoadLibrary ("Advapi32.dll");
6447 s_pfn_Open_Thread_Token
=
6448 (OpenThreadToken_Proc
) GetProcAddress (hm_advapi32
, "OpenThreadToken");
6450 if (s_pfn_Open_Thread_Token
== NULL
)
6452 SetLastError (ERROR_NOT_SUPPORTED
);
6456 s_pfn_Open_Thread_Token (
6465 impersonate_self (SECURITY_IMPERSONATION_LEVEL ImpersonationLevel
)
6467 static ImpersonateSelf_Proc s_pfn_Impersonate_Self
= NULL
;
6468 HMODULE hm_advapi32
= NULL
;
6469 if (is_windows_9x () == TRUE
)
6473 if (g_b_init_impersonate_self
== 0)
6475 g_b_init_impersonate_self
= 1;
6476 hm_advapi32
= LoadLibrary ("Advapi32.dll");
6477 s_pfn_Impersonate_Self
=
6478 (ImpersonateSelf_Proc
) GetProcAddress (hm_advapi32
, "ImpersonateSelf");
6480 if (s_pfn_Impersonate_Self
== NULL
)
6484 return s_pfn_Impersonate_Self (ImpersonationLevel
);
6488 revert_to_self (void)
6490 static RevertToSelf_Proc s_pfn_Revert_To_Self
= NULL
;
6491 HMODULE hm_advapi32
= NULL
;
6492 if (is_windows_9x () == TRUE
)
6496 if (g_b_init_revert_to_self
== 0)
6498 g_b_init_revert_to_self
= 1;
6499 hm_advapi32
= LoadLibrary ("Advapi32.dll");
6500 s_pfn_Revert_To_Self
=
6501 (RevertToSelf_Proc
) GetProcAddress (hm_advapi32
, "RevertToSelf");
6503 if (s_pfn_Revert_To_Self
== NULL
)
6507 return s_pfn_Revert_To_Self ();
6511 get_process_memory_info (HANDLE h_proc
,
6512 PPROCESS_MEMORY_COUNTERS mem_counters
,
6515 static GetProcessMemoryInfo_Proc s_pfn_Get_Process_Memory_Info
= NULL
;
6516 HMODULE hm_psapi
= NULL
;
6517 if (is_windows_9x () == TRUE
)
6521 if (g_b_init_get_process_memory_info
== 0)
6523 g_b_init_get_process_memory_info
= 1;
6524 hm_psapi
= LoadLibrary ("Psapi.dll");
6526 s_pfn_Get_Process_Memory_Info
= (GetProcessMemoryInfo_Proc
)
6527 GetProcAddress (hm_psapi
, "GetProcessMemoryInfo");
6529 if (s_pfn_Get_Process_Memory_Info
== NULL
)
6533 return s_pfn_Get_Process_Memory_Info (h_proc
, mem_counters
, bufsize
);
6537 get_process_working_set_size (HANDLE h_proc
,
6541 static GetProcessWorkingSetSize_Proc
6542 s_pfn_Get_Process_Working_Set_Size
= NULL
;
6544 if (is_windows_9x () == TRUE
)
6548 if (g_b_init_get_process_working_set_size
== 0)
6550 g_b_init_get_process_working_set_size
= 1;
6551 s_pfn_Get_Process_Working_Set_Size
= (GetProcessWorkingSetSize_Proc
)
6552 GetProcAddress (GetModuleHandle ("kernel32.dll"),
6553 "GetProcessWorkingSetSize");
6555 if (s_pfn_Get_Process_Working_Set_Size
== NULL
)
6559 return s_pfn_Get_Process_Working_Set_Size (h_proc
, minrss
, maxrss
);
6563 global_memory_status (MEMORYSTATUS
*buf
)
6565 static GlobalMemoryStatus_Proc s_pfn_Global_Memory_Status
= NULL
;
6567 if (is_windows_9x () == TRUE
)
6571 if (g_b_init_global_memory_status
== 0)
6573 g_b_init_global_memory_status
= 1;
6574 s_pfn_Global_Memory_Status
= (GlobalMemoryStatus_Proc
)
6575 GetProcAddress (GetModuleHandle ("kernel32.dll"),
6576 "GlobalMemoryStatus");
6578 if (s_pfn_Global_Memory_Status
== NULL
)
6582 return s_pfn_Global_Memory_Status (buf
);
6586 global_memory_status_ex (MEMORY_STATUS_EX
*buf
)
6588 static GlobalMemoryStatusEx_Proc s_pfn_Global_Memory_Status_Ex
= NULL
;
6590 if (is_windows_9x () == TRUE
)
6594 if (g_b_init_global_memory_status_ex
== 0)
6596 g_b_init_global_memory_status_ex
= 1;
6597 s_pfn_Global_Memory_Status_Ex
= (GlobalMemoryStatusEx_Proc
)
6598 GetProcAddress (GetModuleHandle ("kernel32.dll"),
6599 "GlobalMemoryStatusEx");
6601 if (s_pfn_Global_Memory_Status_Ex
== NULL
)
6605 return s_pfn_Global_Memory_Status_Ex (buf
);
6609 list_system_processes (void)
6611 Lisp_Object proclist
= Qnil
;
6614 h_snapshot
= create_toolhelp32_snapshot (TH32CS_SNAPPROCESS
, 0);
6616 if (h_snapshot
!= INVALID_HANDLE_VALUE
)
6618 PROCESSENTRY32 proc_entry
;
6622 proc_entry
.dwSize
= sizeof (PROCESSENTRY32
);
6623 for (res
= process32_first (h_snapshot
, &proc_entry
); res
;
6624 res
= process32_next (h_snapshot
, &proc_entry
))
6626 proc_id
= proc_entry
.th32ProcessID
;
6627 proclist
= Fcons (make_fixnum_or_float (proc_id
), proclist
);
6630 CloseHandle (h_snapshot
);
6631 proclist
= Fnreverse (proclist
);
6638 enable_privilege (LPCTSTR priv_name
, BOOL enable_p
, TOKEN_PRIVILEGES
*old_priv
)
6640 TOKEN_PRIVILEGES priv
;
6641 DWORD priv_size
= sizeof (priv
);
6642 DWORD opriv_size
= sizeof (*old_priv
);
6643 HANDLE h_token
= NULL
;
6644 HANDLE h_thread
= GetCurrentThread ();
6648 res
= open_thread_token (h_thread
,
6649 TOKEN_QUERY
| TOKEN_ADJUST_PRIVILEGES
,
6651 if (!res
&& GetLastError () == ERROR_NO_TOKEN
)
6653 if (impersonate_self (SecurityImpersonation
))
6654 res
= open_thread_token (h_thread
,
6655 TOKEN_QUERY
| TOKEN_ADJUST_PRIVILEGES
,
6660 priv
.PrivilegeCount
= 1;
6661 priv
.Privileges
[0].Attributes
= enable_p
? SE_PRIVILEGE_ENABLED
: 0;
6662 LookupPrivilegeValue (NULL
, priv_name
, &priv
.Privileges
[0].Luid
);
6663 if (AdjustTokenPrivileges (h_token
, FALSE
, &priv
, priv_size
,
6664 old_priv
, &opriv_size
)
6665 && GetLastError () != ERROR_NOT_ALL_ASSIGNED
)
6669 CloseHandle (h_token
);
6675 restore_privilege (TOKEN_PRIVILEGES
*priv
)
6677 DWORD priv_size
= sizeof (*priv
);
6678 HANDLE h_token
= NULL
;
6681 if (open_thread_token (GetCurrentThread (),
6682 TOKEN_QUERY
| TOKEN_ADJUST_PRIVILEGES
,
6685 if (AdjustTokenPrivileges (h_token
, FALSE
, priv
, priv_size
, NULL
, NULL
)
6686 && GetLastError () != ERROR_NOT_ALL_ASSIGNED
)
6690 CloseHandle (h_token
);
6696 ltime (ULONGLONG time_100ns
)
6698 ULONGLONG time_sec
= time_100ns
/ 10000000;
6699 int subsec
= time_100ns
% 10000000;
6700 return list4i (time_sec
>> 16, time_sec
& 0xffff,
6701 subsec
/ 10, subsec
% 10 * 100000);
6704 #define U64_TO_LISP_TIME(time) ltime (time)
6707 process_times (HANDLE h_proc
, Lisp_Object
*ctime
, Lisp_Object
*etime
,
6708 Lisp_Object
*stime
, Lisp_Object
*utime
, Lisp_Object
*ttime
,
6711 FILETIME ft_creation
, ft_exit
, ft_kernel
, ft_user
, ft_current
;
6712 ULONGLONG tem1
, tem2
, tem3
, tem
;
6715 || !get_process_times_fn
6716 || !(*get_process_times_fn
) (h_proc
, &ft_creation
, &ft_exit
,
6717 &ft_kernel
, &ft_user
))
6720 GetSystemTimeAsFileTime (&ft_current
);
6722 FILETIME_TO_U64 (tem1
, ft_kernel
);
6723 *stime
= U64_TO_LISP_TIME (tem1
);
6725 FILETIME_TO_U64 (tem2
, ft_user
);
6726 *utime
= U64_TO_LISP_TIME (tem2
);
6729 *ttime
= U64_TO_LISP_TIME (tem3
);
6731 FILETIME_TO_U64 (tem
, ft_creation
);
6732 /* Process no 4 (System) returns zero creation time. */
6735 *ctime
= U64_TO_LISP_TIME (tem
);
6739 FILETIME_TO_U64 (tem3
, ft_current
);
6740 tem
= (tem3
- utc_base
) - tem
;
6742 *etime
= U64_TO_LISP_TIME (tem
);
6746 *pcpu
= 100.0 * (tem1
+ tem2
) / tem
;
6757 system_process_attributes (Lisp_Object pid
)
6759 Lisp_Object attrs
= Qnil
;
6760 Lisp_Object cmd_str
, decoded_cmd
, tem
;
6761 HANDLE h_snapshot
, h_proc
;
6764 char uname
[UNLEN
+1], gname
[GNLEN
+1], domain
[1025];
6765 DWORD ulength
= sizeof (uname
), dlength
= sizeof (domain
), needed
;
6766 DWORD glength
= sizeof (gname
);
6767 HANDLE token
= NULL
;
6768 SID_NAME_USE user_type
;
6769 unsigned char *buf
= NULL
;
6771 TOKEN_USER user_token
;
6772 TOKEN_PRIMARY_GROUP group_token
;
6775 PROCESS_MEMORY_COUNTERS mem
;
6776 PROCESS_MEMORY_COUNTERS_EX mem_ex
;
6777 SIZE_T minrss
, maxrss
;
6779 MEMORY_STATUS_EX memstex
;
6780 double totphys
= 0.0;
6781 Lisp_Object ctime
, stime
, utime
, etime
, ttime
;
6783 BOOL result
= FALSE
;
6785 CHECK_NUMBER_OR_FLOAT (pid
);
6786 proc_id
= FLOATP (pid
) ? XFLOAT_DATA (pid
) : XINT (pid
);
6788 h_snapshot
= create_toolhelp32_snapshot (TH32CS_SNAPPROCESS
, 0);
6790 if (h_snapshot
!= INVALID_HANDLE_VALUE
)
6795 pe
.dwSize
= sizeof (PROCESSENTRY32
);
6796 for (res
= process32_first (h_snapshot
, &pe
); res
;
6797 res
= process32_next (h_snapshot
, &pe
))
6799 if (proc_id
== pe
.th32ProcessID
)
6802 decoded_cmd
= build_string ("Idle");
6805 /* Decode the command name from locale-specific
6807 cmd_str
= build_unibyte_string (pe
.szExeFile
);
6810 code_convert_string_norecord (cmd_str
,
6811 Vlocale_coding_system
, 0);
6813 attrs
= Fcons (Fcons (Qcomm
, decoded_cmd
), attrs
);
6814 attrs
= Fcons (Fcons (Qppid
,
6815 make_fixnum_or_float (pe
.th32ParentProcessID
)),
6817 attrs
= Fcons (Fcons (Qpri
, make_number (pe
.pcPriClassBase
)),
6819 attrs
= Fcons (Fcons (Qthcount
,
6820 make_fixnum_or_float (pe
.cntThreads
)),
6827 CloseHandle (h_snapshot
);
6833 h_proc
= OpenProcess (PROCESS_QUERY_INFORMATION
| PROCESS_VM_READ
,
6835 /* If we were denied a handle to the process, try again after
6836 enabling the SeDebugPrivilege in our process. */
6839 TOKEN_PRIVILEGES priv_current
;
6841 if (enable_privilege (SE_DEBUG_NAME
, TRUE
, &priv_current
))
6843 h_proc
= OpenProcess (PROCESS_QUERY_INFORMATION
| PROCESS_VM_READ
,
6845 restore_privilege (&priv_current
);
6851 result
= open_process_token (h_proc
, TOKEN_QUERY
, &token
);
6854 result
= get_token_information (token
, TokenUser
, NULL
, 0, &blen
);
6855 if (!result
&& GetLastError () == ERROR_INSUFFICIENT_BUFFER
)
6857 buf
= xmalloc (blen
);
6858 result
= get_token_information (token
, TokenUser
,
6859 (LPVOID
)buf
, blen
, &needed
);
6862 memcpy (&user_token
, buf
, sizeof (user_token
));
6863 if (!w32_cached_id (user_token
.User
.Sid
, &euid
, uname
))
6865 euid
= get_rid (user_token
.User
.Sid
);
6866 result
= lookup_account_sid (NULL
, user_token
.User
.Sid
,
6871 w32_add_to_cache (user_token
.User
.Sid
, euid
, uname
);
6874 strcpy (uname
, "unknown");
6878 ulength
= strlen (uname
);
6884 /* Determine a reasonable euid and gid values. */
6885 if (xstrcasecmp ("administrator", uname
) == 0)
6887 euid
= 500; /* well-known Administrator uid */
6888 egid
= 513; /* well-known None gid */
6892 /* Get group id and name. */
6893 result
= get_token_information (token
, TokenPrimaryGroup
,
6894 (LPVOID
)buf
, blen
, &needed
);
6895 if (!result
&& GetLastError () == ERROR_INSUFFICIENT_BUFFER
)
6897 buf
= xrealloc (buf
, blen
= needed
);
6898 result
= get_token_information (token
, TokenPrimaryGroup
,
6899 (LPVOID
)buf
, blen
, &needed
);
6903 memcpy (&group_token
, buf
, sizeof (group_token
));
6904 if (!w32_cached_id (group_token
.PrimaryGroup
, &egid
, gname
))
6906 egid
= get_rid (group_token
.PrimaryGroup
);
6907 dlength
= sizeof (domain
);
6909 lookup_account_sid (NULL
, group_token
.PrimaryGroup
,
6910 gname
, &glength
, NULL
, &dlength
,
6913 w32_add_to_cache (group_token
.PrimaryGroup
,
6917 strcpy (gname
, "None");
6921 glength
= strlen (gname
);
6929 if (!is_windows_9x ())
6931 /* We couldn't open the process token, presumably because of
6932 insufficient access rights. Assume this process is run
6934 strcpy (uname
, "SYSTEM");
6935 strcpy (gname
, "None");
6936 euid
= 18; /* SYSTEM */
6937 egid
= 513; /* None */
6938 glength
= strlen (gname
);
6939 ulength
= strlen (uname
);
6941 /* If we are running under Windows 9X, where security calls are
6942 not supported, we assume all processes are run by the current
6944 else if (GetUserName (uname
, &ulength
))
6946 if (xstrcasecmp ("administrator", uname
) == 0)
6951 strcpy (gname
, "None");
6952 glength
= strlen (gname
);
6953 ulength
= strlen (uname
);
6959 strcpy (uname
, "administrator");
6960 ulength
= strlen (uname
);
6961 strcpy (gname
, "None");
6962 glength
= strlen (gname
);
6965 CloseHandle (token
);
6968 attrs
= Fcons (Fcons (Qeuid
, make_fixnum_or_float (euid
)), attrs
);
6969 tem
= make_unibyte_string (uname
, ulength
);
6970 attrs
= Fcons (Fcons (Quser
,
6971 code_convert_string_norecord (tem
, Vlocale_coding_system
, 0)),
6973 attrs
= Fcons (Fcons (Qegid
, make_fixnum_or_float (egid
)), attrs
);
6974 tem
= make_unibyte_string (gname
, glength
);
6975 attrs
= Fcons (Fcons (Qgroup
,
6976 code_convert_string_norecord (tem
, Vlocale_coding_system
, 0)),
6979 if (global_memory_status_ex (&memstex
))
6980 #if __GNUC__ || (defined (_MSC_VER) && _MSC_VER >= 1300)
6981 totphys
= memstex
.ullTotalPhys
/ 1024.0;
6983 /* Visual Studio 6 cannot convert an unsigned __int64 type to
6984 double, so we need to do this for it... */
6986 DWORD tot_hi
= memstex
.ullTotalPhys
>> 32;
6987 DWORD tot_md
= (memstex
.ullTotalPhys
& 0x00000000ffffffff) >> 10;
6988 DWORD tot_lo
= memstex
.ullTotalPhys
% 1024;
6990 totphys
= tot_hi
* 4194304.0 + tot_md
+ tot_lo
/ 1024.0;
6992 #endif /* __GNUC__ || _MSC_VER >= 1300 */
6993 else if (global_memory_status (&memst
))
6994 totphys
= memst
.dwTotalPhys
/ 1024.0;
6997 && get_process_memory_info (h_proc
, (PROCESS_MEMORY_COUNTERS
*)&mem_ex
,
7000 SIZE_T rss
= mem_ex
.WorkingSetSize
/ 1024;
7002 attrs
= Fcons (Fcons (Qmajflt
,
7003 make_fixnum_or_float (mem_ex
.PageFaultCount
)),
7005 attrs
= Fcons (Fcons (Qvsize
,
7006 make_fixnum_or_float (mem_ex
.PrivateUsage
/ 1024)),
7008 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (rss
)), attrs
);
7010 attrs
= Fcons (Fcons (Qpmem
, make_float (100. * rss
/ totphys
)), attrs
);
7013 && get_process_memory_info (h_proc
, &mem
, sizeof (mem
)))
7015 SIZE_T rss
= mem_ex
.WorkingSetSize
/ 1024;
7017 attrs
= Fcons (Fcons (Qmajflt
,
7018 make_fixnum_or_float (mem
.PageFaultCount
)),
7020 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (rss
)), attrs
);
7022 attrs
= Fcons (Fcons (Qpmem
, make_float (100. * rss
/ totphys
)), attrs
);
7025 && get_process_working_set_size (h_proc
, &minrss
, &maxrss
))
7027 DWORD rss
= maxrss
/ 1024;
7029 attrs
= Fcons (Fcons (Qrss
, make_fixnum_or_float (maxrss
/ 1024)), attrs
);
7031 attrs
= Fcons (Fcons (Qpmem
, make_float (100. * rss
/ totphys
)), attrs
);
7034 if (process_times (h_proc
, &ctime
, &etime
, &stime
, &utime
, &ttime
, &pcpu
))
7036 attrs
= Fcons (Fcons (Qutime
, utime
), attrs
);
7037 attrs
= Fcons (Fcons (Qstime
, stime
), attrs
);
7038 attrs
= Fcons (Fcons (Qtime
, ttime
), attrs
);
7039 attrs
= Fcons (Fcons (Qstart
, ctime
), attrs
);
7040 attrs
= Fcons (Fcons (Qetime
, etime
), attrs
);
7041 attrs
= Fcons (Fcons (Qpcpu
, make_float (pcpu
)), attrs
);
7044 /* FIXME: Retrieve command line by walking the PEB of the process. */
7047 CloseHandle (h_proc
);
7052 w32_memory_info (unsigned long long *totalram
, unsigned long long *freeram
,
7053 unsigned long long *totalswap
, unsigned long long *freeswap
)
7056 MEMORY_STATUS_EX memstex
;
7058 /* Use GlobalMemoryStatusEx if available, as it can report more than
7060 if (global_memory_status_ex (&memstex
))
7062 *totalram
= memstex
.ullTotalPhys
;
7063 *freeram
= memstex
.ullAvailPhys
;
7064 *totalswap
= memstex
.ullTotalPageFile
;
7065 *freeswap
= memstex
.ullAvailPageFile
;
7068 else if (global_memory_status (&memst
))
7070 *totalram
= memst
.dwTotalPhys
;
7071 *freeram
= memst
.dwAvailPhys
;
7072 *totalswap
= memst
.dwTotalPageFile
;
7073 *freeswap
= memst
.dwAvailPageFile
;
7081 /* Wrappers for winsock functions to map between our file descriptors
7082 and winsock's handles; also set h_errno for convenience.
7084 To allow Emacs to run on systems which don't have winsock support
7085 installed, we dynamically link to winsock on startup if present, and
7086 otherwise provide the minimum necessary functionality
7087 (eg. gethostname). */
7089 /* function pointers for relevant socket functions */
7090 int (PASCAL
*pfn_WSAStartup
) (WORD wVersionRequired
, LPWSADATA lpWSAData
);
7091 void (PASCAL
*pfn_WSASetLastError
) (int iError
);
7092 int (PASCAL
*pfn_WSAGetLastError
) (void);
7093 int (PASCAL
*pfn_WSAEventSelect
) (SOCKET s
, HANDLE hEventObject
, long lNetworkEvents
);
7094 int (PASCAL
*pfn_WSAEnumNetworkEvents
) (SOCKET s
, HANDLE hEventObject
,
7095 WSANETWORKEVENTS
*NetworkEvents
);
7097 HANDLE (PASCAL
*pfn_WSACreateEvent
) (void);
7098 int (PASCAL
*pfn_WSACloseEvent
) (HANDLE hEvent
);
7099 int (PASCAL
*pfn_socket
) (int af
, int type
, int protocol
);
7100 int (PASCAL
*pfn_bind
) (SOCKET s
, const struct sockaddr
*addr
, int namelen
);
7101 int (PASCAL
*pfn_connect
) (SOCKET s
, const struct sockaddr
*addr
, int namelen
);
7102 int (PASCAL
*pfn_ioctlsocket
) (SOCKET s
, long cmd
, u_long
*argp
);
7103 int (PASCAL
*pfn_recv
) (SOCKET s
, char * buf
, int len
, int flags
);
7104 int (PASCAL
*pfn_send
) (SOCKET s
, const char * buf
, int len
, int flags
);
7105 int (PASCAL
*pfn_closesocket
) (SOCKET s
);
7106 int (PASCAL
*pfn_shutdown
) (SOCKET s
, int how
);
7107 int (PASCAL
*pfn_WSACleanup
) (void);
7109 u_short (PASCAL
*pfn_htons
) (u_short hostshort
);
7110 u_short (PASCAL
*pfn_ntohs
) (u_short netshort
);
7111 unsigned long (PASCAL
*pfn_inet_addr
) (const char * cp
);
7112 int (PASCAL
*pfn_gethostname
) (char * name
, int namelen
);
7113 struct hostent
* (PASCAL
*pfn_gethostbyname
) (const char * name
);
7114 struct servent
* (PASCAL
*pfn_getservbyname
) (const char * name
, const char * proto
);
7115 int (PASCAL
*pfn_getpeername
) (SOCKET s
, struct sockaddr
*addr
, int * namelen
);
7116 int (PASCAL
*pfn_setsockopt
) (SOCKET s
, int level
, int optname
,
7117 const char * optval
, int optlen
);
7118 int (PASCAL
*pfn_listen
) (SOCKET s
, int backlog
);
7119 int (PASCAL
*pfn_getsockname
) (SOCKET s
, struct sockaddr
* name
,
7121 SOCKET (PASCAL
*pfn_accept
) (SOCKET s
, struct sockaddr
* addr
, int * addrlen
);
7122 int (PASCAL
*pfn_recvfrom
) (SOCKET s
, char * buf
, int len
, int flags
,
7123 struct sockaddr
* from
, int * fromlen
);
7124 int (PASCAL
*pfn_sendto
) (SOCKET s
, const char * buf
, int len
, int flags
,
7125 const struct sockaddr
* to
, int tolen
);
7127 /* SetHandleInformation is only needed to make sockets non-inheritable. */
7128 BOOL (WINAPI
*pfn_SetHandleInformation
) (HANDLE object
, DWORD mask
, DWORD flags
);
7129 #ifndef HANDLE_FLAG_INHERIT
7130 #define HANDLE_FLAG_INHERIT 1
7134 static int winsock_inuse
;
7139 if (winsock_lib
!= NULL
&& winsock_inuse
== 0)
7141 release_listen_threads ();
7142 /* Not sure what would cause WSAENETDOWN, or even if it can happen
7143 after WSAStartup returns successfully, but it seems reasonable
7144 to allow unloading winsock anyway in that case. */
7145 if (pfn_WSACleanup () == 0 ||
7146 pfn_WSAGetLastError () == WSAENETDOWN
)
7148 if (FreeLibrary (winsock_lib
))
7157 init_winsock (int load_now
)
7159 WSADATA winsockData
;
7161 if (winsock_lib
!= NULL
)
7164 pfn_SetHandleInformation
7165 = (void *) GetProcAddress (GetModuleHandle ("kernel32.dll"),
7166 "SetHandleInformation");
7168 winsock_lib
= LoadLibrary ("Ws2_32.dll");
7170 if (winsock_lib
!= NULL
)
7172 /* dynamically link to socket functions */
7174 #define LOAD_PROC(fn) \
7175 if ((pfn_##fn = (void *) GetProcAddress (winsock_lib, #fn)) == NULL) \
7178 LOAD_PROC (WSAStartup
);
7179 LOAD_PROC (WSASetLastError
);
7180 LOAD_PROC (WSAGetLastError
);
7181 LOAD_PROC (WSAEventSelect
);
7182 LOAD_PROC (WSAEnumNetworkEvents
);
7183 LOAD_PROC (WSACreateEvent
);
7184 LOAD_PROC (WSACloseEvent
);
7187 LOAD_PROC (connect
);
7188 LOAD_PROC (ioctlsocket
);
7191 LOAD_PROC (closesocket
);
7192 LOAD_PROC (shutdown
);
7195 LOAD_PROC (inet_addr
);
7196 LOAD_PROC (gethostname
);
7197 LOAD_PROC (gethostbyname
);
7198 LOAD_PROC (getservbyname
);
7199 LOAD_PROC (getpeername
);
7200 LOAD_PROC (WSACleanup
);
7201 LOAD_PROC (setsockopt
);
7203 LOAD_PROC (getsockname
);
7205 LOAD_PROC (recvfrom
);
7209 /* specify version 1.1 of winsock */
7210 if (pfn_WSAStartup (0x101, &winsockData
) == 0)
7212 if (winsockData
.wVersion
!= 0x101)
7217 /* Report that winsock exists and is usable, but leave
7218 socket functions disabled. I am assuming that calling
7219 WSAStartup does not require any network interaction,
7220 and in particular does not cause or require a dial-up
7221 connection to be established. */
7224 FreeLibrary (winsock_lib
);
7232 FreeLibrary (winsock_lib
);
7242 /* Function to map winsock error codes to errno codes for those errno
7243 code defined in errno.h (errno values not defined by errno.h are
7244 already in nt/inc/sys/socket.h). */
7251 if (winsock_lib
== NULL
)
7254 wsa_err
= pfn_WSAGetLastError ();
7258 case WSAEACCES
: errno
= EACCES
; break;
7259 case WSAEBADF
: errno
= EBADF
; break;
7260 case WSAEFAULT
: errno
= EFAULT
; break;
7261 case WSAEINTR
: errno
= EINTR
; break;
7262 case WSAEINVAL
: errno
= EINVAL
; break;
7263 case WSAEMFILE
: errno
= EMFILE
; break;
7264 case WSAENAMETOOLONG
: errno
= ENAMETOOLONG
; break;
7265 case WSAENOTEMPTY
: errno
= ENOTEMPTY
; break;
7266 case WSAEWOULDBLOCK
: errno
= EWOULDBLOCK
; break;
7267 case WSAENOTCONN
: errno
= ENOTCONN
; break;
7268 default: errno
= wsa_err
; break;
7276 if (winsock_lib
!= NULL
)
7277 pfn_WSASetLastError (0);
7280 /* Extend strerror to handle the winsock-specific error codes. */
7284 } _wsa_errlist
[] = {
7285 {WSAEINTR
, "Interrupted function call"},
7286 {WSAEBADF
, "Bad file descriptor"},
7287 {WSAEACCES
, "Permission denied"},
7288 {WSAEFAULT
, "Bad address"},
7289 {WSAEINVAL
, "Invalid argument"},
7290 {WSAEMFILE
, "Too many open files"},
7292 {WSAEWOULDBLOCK
, "Resource temporarily unavailable"},
7293 {WSAEINPROGRESS
, "Operation now in progress"},
7294 {WSAEALREADY
, "Operation already in progress"},
7295 {WSAENOTSOCK
, "Socket operation on non-socket"},
7296 {WSAEDESTADDRREQ
, "Destination address required"},
7297 {WSAEMSGSIZE
, "Message too long"},
7298 {WSAEPROTOTYPE
, "Protocol wrong type for socket"},
7299 {WSAENOPROTOOPT
, "Bad protocol option"},
7300 {WSAEPROTONOSUPPORT
, "Protocol not supported"},
7301 {WSAESOCKTNOSUPPORT
, "Socket type not supported"},
7302 {WSAEOPNOTSUPP
, "Operation not supported"},
7303 {WSAEPFNOSUPPORT
, "Protocol family not supported"},
7304 {WSAEAFNOSUPPORT
, "Address family not supported by protocol family"},
7305 {WSAEADDRINUSE
, "Address already in use"},
7306 {WSAEADDRNOTAVAIL
, "Cannot assign requested address"},
7307 {WSAENETDOWN
, "Network is down"},
7308 {WSAENETUNREACH
, "Network is unreachable"},
7309 {WSAENETRESET
, "Network dropped connection on reset"},
7310 {WSAECONNABORTED
, "Software caused connection abort"},
7311 {WSAECONNRESET
, "Connection reset by peer"},
7312 {WSAENOBUFS
, "No buffer space available"},
7313 {WSAEISCONN
, "Socket is already connected"},
7314 {WSAENOTCONN
, "Socket is not connected"},
7315 {WSAESHUTDOWN
, "Cannot send after socket shutdown"},
7316 {WSAETOOMANYREFS
, "Too many references"}, /* not sure */
7317 {WSAETIMEDOUT
, "Connection timed out"},
7318 {WSAECONNREFUSED
, "Connection refused"},
7319 {WSAELOOP
, "Network loop"}, /* not sure */
7320 {WSAENAMETOOLONG
, "Name is too long"},
7321 {WSAEHOSTDOWN
, "Host is down"},
7322 {WSAEHOSTUNREACH
, "No route to host"},
7323 {WSAENOTEMPTY
, "Buffer not empty"}, /* not sure */
7324 {WSAEPROCLIM
, "Too many processes"},
7325 {WSAEUSERS
, "Too many users"}, /* not sure */
7326 {WSAEDQUOT
, "Double quote in host name"}, /* really not sure */
7327 {WSAESTALE
, "Data is stale"}, /* not sure */
7328 {WSAEREMOTE
, "Remote error"}, /* not sure */
7330 {WSASYSNOTREADY
, "Network subsystem is unavailable"},
7331 {WSAVERNOTSUPPORTED
, "WINSOCK.DLL version out of range"},
7332 {WSANOTINITIALISED
, "Winsock not initialized successfully"},
7333 {WSAEDISCON
, "Graceful shutdown in progress"},
7335 {WSAENOMORE
, "No more operations allowed"}, /* not sure */
7336 {WSAECANCELLED
, "Operation cancelled"}, /* not sure */
7337 {WSAEINVALIDPROCTABLE
, "Invalid procedure table from service provider"},
7338 {WSAEINVALIDPROVIDER
, "Invalid service provider version number"},
7339 {WSAEPROVIDERFAILEDINIT
, "Unable to initialize a service provider"},
7340 {WSASYSCALLFAILURE
, "System call failure"},
7341 {WSASERVICE_NOT_FOUND
, "Service not found"}, /* not sure */
7342 {WSATYPE_NOT_FOUND
, "Class type not found"},
7343 {WSA_E_NO_MORE
, "No more resources available"}, /* really not sure */
7344 {WSA_E_CANCELLED
, "Operation already cancelled"}, /* really not sure */
7345 {WSAEREFUSED
, "Operation refused"}, /* not sure */
7348 {WSAHOST_NOT_FOUND
, "Host not found"},
7349 {WSATRY_AGAIN
, "Authoritative host not found during name lookup"},
7350 {WSANO_RECOVERY
, "Non-recoverable error during name lookup"},
7351 {WSANO_DATA
, "Valid name, no data record of requested type"},
7357 sys_strerror (int error_no
)
7360 static char unknown_msg
[40];
7362 if (error_no
>= 0 && error_no
< sys_nerr
)
7363 return sys_errlist
[error_no
];
7365 for (i
= 0; _wsa_errlist
[i
].errnum
>= 0; i
++)
7366 if (_wsa_errlist
[i
].errnum
== error_no
)
7367 return _wsa_errlist
[i
].msg
;
7369 sprintf (unknown_msg
, "Unidentified error: %d", error_no
);
7373 /* [andrewi 3-May-96] I've had conflicting results using both methods,
7374 but I believe the method of keeping the socket handle separate (and
7375 insuring it is not inheritable) is the correct one. */
7377 #define SOCK_HANDLE(fd) ((SOCKET) fd_info[fd].hnd)
7379 static int socket_to_fd (SOCKET s
);
7382 sys_socket (int af
, int type
, int protocol
)
7386 if (winsock_lib
== NULL
)
7389 return INVALID_SOCKET
;
7394 /* call the real socket function */
7395 s
= pfn_socket (af
, type
, protocol
);
7397 if (s
!= INVALID_SOCKET
)
7398 return socket_to_fd (s
);
7404 /* Convert a SOCKET to a file descriptor. */
7406 socket_to_fd (SOCKET s
)
7411 /* Although under NT 3.5 _open_osfhandle will accept a socket
7412 handle, if opened with SO_OPENTYPE == SO_SYNCHRONOUS_NONALERT,
7413 that does not work under NT 3.1. However, we can get the same
7414 effect by using a backdoor function to replace an existing
7415 descriptor handle with the one we want. */
7417 /* allocate a file descriptor (with appropriate flags) */
7418 fd
= _open ("NUL:", _O_RDWR
);
7421 /* Make a non-inheritable copy of the socket handle. Note
7422 that it is possible that sockets aren't actually kernel
7423 handles, which appears to be the case on Windows 9x when
7424 the MS Proxy winsock client is installed. */
7426 /* Apparently there is a bug in NT 3.51 with some service
7427 packs, which prevents using DuplicateHandle to make a
7428 socket handle non-inheritable (causes WSACleanup to
7429 hang). The work-around is to use SetHandleInformation
7430 instead if it is available and implemented. */
7431 if (pfn_SetHandleInformation
)
7433 pfn_SetHandleInformation ((HANDLE
) s
, HANDLE_FLAG_INHERIT
, 0);
7437 HANDLE parent
= GetCurrentProcess ();
7438 HANDLE new_s
= INVALID_HANDLE_VALUE
;
7440 if (DuplicateHandle (parent
,
7446 DUPLICATE_SAME_ACCESS
))
7448 /* It is possible that DuplicateHandle succeeds even
7449 though the socket wasn't really a kernel handle,
7450 because a real handle has the same value. So
7451 test whether the new handle really is a socket. */
7452 long nonblocking
= 0;
7453 if (pfn_ioctlsocket ((SOCKET
) new_s
, FIONBIO
, &nonblocking
) == 0)
7455 pfn_closesocket (s
);
7460 CloseHandle (new_s
);
7465 eassert (fd
< MAXDESC
);
7466 fd_info
[fd
].hnd
= (HANDLE
) s
;
7468 /* set our own internal flags */
7469 fd_info
[fd
].flags
= FILE_SOCKET
| FILE_BINARY
| FILE_READ
| FILE_WRITE
;
7475 cp
->status
= STATUS_READ_ACKNOWLEDGED
;
7477 /* attach child_process to fd_info */
7478 if (fd_info
[ fd
].cp
!= NULL
)
7480 DebPrint (("sys_socket: fd_info[%d] apparently in use!\n", fd
));
7484 fd_info
[ fd
].cp
= cp
;
7487 winsock_inuse
++; /* count open sockets */
7495 pfn_closesocket (s
);
7501 sys_bind (int s
, const struct sockaddr
* addr
, int namelen
)
7503 if (winsock_lib
== NULL
)
7506 return SOCKET_ERROR
;
7510 if (fd_info
[s
].flags
& FILE_SOCKET
)
7512 int rc
= pfn_bind (SOCK_HANDLE (s
), addr
, namelen
);
7513 if (rc
== SOCKET_ERROR
)
7518 return SOCKET_ERROR
;
7522 sys_connect (int s
, const struct sockaddr
* name
, int namelen
)
7524 if (winsock_lib
== NULL
)
7527 return SOCKET_ERROR
;
7531 if (fd_info
[s
].flags
& FILE_SOCKET
)
7533 int rc
= pfn_connect (SOCK_HANDLE (s
), name
, namelen
);
7534 if (rc
== SOCKET_ERROR
)
7537 /* If this is a non-blocking 'connect', set the bit in flags
7538 that will tell reader_thread to wait for connection
7539 before trying to read. */
7540 if (errno
== EWOULDBLOCK
&& (fd_info
[s
].flags
& FILE_NDELAY
) != 0)
7542 errno
= EINPROGRESS
; /* that's what process.c expects */
7543 fd_info
[s
].flags
|= FILE_CONNECT
;
7549 return SOCKET_ERROR
;
7553 sys_htons (u_short hostshort
)
7555 return (winsock_lib
!= NULL
) ?
7556 pfn_htons (hostshort
) : hostshort
;
7560 sys_ntohs (u_short netshort
)
7562 return (winsock_lib
!= NULL
) ?
7563 pfn_ntohs (netshort
) : netshort
;
7567 sys_inet_addr (const char * cp
)
7569 return (winsock_lib
!= NULL
) ?
7570 pfn_inet_addr (cp
) : INADDR_NONE
;
7574 sys_gethostname (char * name
, int namelen
)
7576 if (winsock_lib
!= NULL
)
7581 retval
= pfn_gethostname (name
, namelen
);
7582 if (retval
== SOCKET_ERROR
)
7587 if (namelen
> MAX_COMPUTERNAME_LENGTH
)
7588 return !GetComputerName (name
, (DWORD
*)&namelen
);
7591 return SOCKET_ERROR
;
7595 sys_gethostbyname (const char * name
)
7597 struct hostent
* host
;
7598 int h_err
= h_errno
;
7600 if (winsock_lib
== NULL
)
7602 h_errno
= NO_RECOVERY
;
7608 host
= pfn_gethostbyname (name
);
7620 sys_getservbyname (const char * name
, const char * proto
)
7622 struct servent
* serv
;
7624 if (winsock_lib
== NULL
)
7631 serv
= pfn_getservbyname (name
, proto
);
7638 sys_getpeername (int s
, struct sockaddr
*addr
, int * namelen
)
7640 if (winsock_lib
== NULL
)
7643 return SOCKET_ERROR
;
7647 if (fd_info
[s
].flags
& FILE_SOCKET
)
7649 int rc
= pfn_getpeername (SOCK_HANDLE (s
), addr
, namelen
);
7650 if (rc
== SOCKET_ERROR
)
7655 return SOCKET_ERROR
;
7659 sys_shutdown (int s
, int how
)
7661 if (winsock_lib
== NULL
)
7664 return SOCKET_ERROR
;
7668 if (fd_info
[s
].flags
& FILE_SOCKET
)
7670 int rc
= pfn_shutdown (SOCK_HANDLE (s
), how
);
7671 if (rc
== SOCKET_ERROR
)
7676 return SOCKET_ERROR
;
7680 sys_setsockopt (int s
, int level
, int optname
, const void * optval
, int optlen
)
7682 if (winsock_lib
== NULL
)
7685 return SOCKET_ERROR
;
7689 if (fd_info
[s
].flags
& FILE_SOCKET
)
7691 int rc
= pfn_setsockopt (SOCK_HANDLE (s
), level
, optname
,
7692 (const char *)optval
, optlen
);
7693 if (rc
== SOCKET_ERROR
)
7698 return SOCKET_ERROR
;
7702 sys_listen (int s
, int backlog
)
7704 if (winsock_lib
== NULL
)
7707 return SOCKET_ERROR
;
7711 if (fd_info
[s
].flags
& FILE_SOCKET
)
7713 int rc
= pfn_listen (SOCK_HANDLE (s
), backlog
);
7714 if (rc
== SOCKET_ERROR
)
7717 fd_info
[s
].flags
|= FILE_LISTEN
;
7721 return SOCKET_ERROR
;
7725 sys_getsockname (int s
, struct sockaddr
* name
, int * namelen
)
7727 if (winsock_lib
== NULL
)
7730 return SOCKET_ERROR
;
7734 if (fd_info
[s
].flags
& FILE_SOCKET
)
7736 int rc
= pfn_getsockname (SOCK_HANDLE (s
), name
, namelen
);
7737 if (rc
== SOCKET_ERROR
)
7742 return SOCKET_ERROR
;
7746 sys_accept (int s
, struct sockaddr
* addr
, int * addrlen
)
7748 if (winsock_lib
== NULL
)
7755 if (fd_info
[s
].flags
& FILE_LISTEN
)
7757 SOCKET t
= pfn_accept (SOCK_HANDLE (s
), addr
, addrlen
);
7759 if (t
== INVALID_SOCKET
)
7762 fd
= socket_to_fd (t
);
7766 fd_info
[s
].cp
->status
= STATUS_READ_ACKNOWLEDGED
;
7767 ResetEvent (fd_info
[s
].cp
->char_avail
);
7776 sys_recvfrom (int s
, char * buf
, int len
, int flags
,
7777 struct sockaddr
* from
, int * fromlen
)
7779 if (winsock_lib
== NULL
)
7782 return SOCKET_ERROR
;
7786 if (fd_info
[s
].flags
& FILE_SOCKET
)
7788 int rc
= pfn_recvfrom (SOCK_HANDLE (s
), buf
, len
, flags
, from
, fromlen
);
7789 if (rc
== SOCKET_ERROR
)
7794 return SOCKET_ERROR
;
7798 sys_sendto (int s
, const char * buf
, int len
, int flags
,
7799 const struct sockaddr
* to
, int tolen
)
7801 if (winsock_lib
== NULL
)
7804 return SOCKET_ERROR
;
7808 if (fd_info
[s
].flags
& FILE_SOCKET
)
7810 int rc
= pfn_sendto (SOCK_HANDLE (s
), buf
, len
, flags
, to
, tolen
);
7811 if (rc
== SOCKET_ERROR
)
7816 return SOCKET_ERROR
;
7819 /* Windows does not have an fcntl function. Provide an implementation
7820 good enough for Emacs. */
7822 fcntl (int s
, int cmd
, int options
)
7824 /* In the w32 Emacs port, fcntl (fd, F_DUPFD_CLOEXEC, fd1) is always
7825 invoked in a context where fd1 is closed and all descriptors less
7826 than fd1 are open, so sys_dup is an adequate implementation. */
7827 if (cmd
== F_DUPFD_CLOEXEC
)
7831 if (fd_info
[s
].flags
& FILE_SOCKET
)
7833 if (winsock_lib
== NULL
)
7839 if (cmd
== F_SETFL
&& options
== O_NONBLOCK
)
7841 unsigned long nblock
= 1;
7842 int rc
= pfn_ioctlsocket (SOCK_HANDLE (s
), FIONBIO
, &nblock
);
7843 if (rc
== SOCKET_ERROR
)
7845 /* Keep track of the fact that we set this to non-blocking. */
7846 fd_info
[s
].flags
|= FILE_NDELAY
;
7852 return SOCKET_ERROR
;
7855 else if ((fd_info
[s
].flags
& (FILE_PIPE
| FILE_WRITE
))
7856 == (FILE_PIPE
| FILE_WRITE
))
7858 /* Force our writes to pipes be non-blocking. */
7859 if (cmd
== F_SETFL
&& options
== O_NONBLOCK
)
7861 HANDLE h
= (HANDLE
)_get_osfhandle (s
);
7862 DWORD pipe_mode
= PIPE_NOWAIT
;
7864 if (!SetNamedPipeHandleState (h
, &pipe_mode
, NULL
, NULL
))
7866 DebPrint (("SetNamedPipeHandleState: %lu\n", GetLastError ()));
7867 return SOCKET_ERROR
;
7869 fd_info
[s
].flags
|= FILE_NDELAY
;
7875 return SOCKET_ERROR
;
7879 return SOCKET_ERROR
;
7883 /* Shadow main io functions: we need to handle pipes and sockets more
7897 if (fd
< MAXDESC
&& fd_info
[fd
].cp
)
7899 child_process
* cp
= fd_info
[fd
].cp
;
7901 fd_info
[fd
].cp
= NULL
;
7903 if (CHILD_ACTIVE (cp
))
7905 /* if last descriptor to active child_process then cleanup */
7907 for (i
= 0; i
< MAXDESC
; i
++)
7911 if (fd_info
[i
].cp
== cp
)
7916 if (fd_info
[fd
].flags
& FILE_SOCKET
)
7918 if (winsock_lib
== NULL
) emacs_abort ();
7920 pfn_shutdown (SOCK_HANDLE (fd
), 2);
7921 rc
= pfn_closesocket (SOCK_HANDLE (fd
));
7923 winsock_inuse
--; /* count open sockets */
7925 /* If the process handle is NULL, it's either a socket
7926 or serial connection, or a subprocess that was
7927 already reaped by reap_subprocess, but whose
7928 resources were not yet freed, because its output was
7929 not fully read yet by the time it was reaped. (This
7930 usually happens with async subprocesses whose output
7931 is being read by Emacs.) Otherwise, this process was
7932 not reaped yet, so we set its FD to a negative value
7933 to make sure sys_select will eventually get to
7934 calling the SIGCHLD handler for it, which will then
7935 invoke waitpid and reap_subprocess. */
7936 if (cp
->procinfo
.hProcess
== NULL
)
7944 if (fd
>= 0 && fd
< MAXDESC
)
7945 fd_info
[fd
].flags
= 0;
7947 /* Note that sockets do not need special treatment here (at least on
7948 NT and Windows 95 using the standard tcp/ip stacks) - it appears that
7949 closesocket is equivalent to CloseHandle, which is to be expected
7950 because socket handles are fully fledged kernel handles. */
7962 if (new_fd
>= 0 && new_fd
< MAXDESC
)
7964 /* duplicate our internal info as well */
7965 fd_info
[new_fd
] = fd_info
[fd
];
7971 sys_dup2 (int src
, int dst
)
7975 if (dst
< 0 || dst
>= MAXDESC
)
7981 /* make sure we close the destination first if it's a pipe or socket */
7982 if (src
!= dst
&& fd_info
[dst
].flags
!= 0)
7985 rc
= _dup2 (src
, dst
);
7988 /* duplicate our internal info as well */
7989 fd_info
[dst
] = fd_info
[src
];
7995 pipe2 (int * phandles
, int pipe2_flags
)
8000 eassert (pipe2_flags
== (O_BINARY
| O_CLOEXEC
));
8002 /* make pipe handles non-inheritable; when we spawn a child, we
8003 replace the relevant handle with an inheritable one. Also put
8004 pipes into binary mode; we will do text mode translation ourselves
8006 rc
= _pipe (phandles
, 0, _O_NOINHERIT
| _O_BINARY
);
8010 /* Protect against overflow, since Windows can open more handles than
8011 our fd_info array has room for. */
8012 if (phandles
[0] >= MAXDESC
|| phandles
[1] >= MAXDESC
)
8014 _close (phandles
[0]);
8015 _close (phandles
[1]);
8021 flags
= FILE_PIPE
| FILE_READ
| FILE_BINARY
;
8022 fd_info
[phandles
[0]].flags
= flags
;
8024 flags
= FILE_PIPE
| FILE_WRITE
| FILE_BINARY
;
8025 fd_info
[phandles
[1]].flags
= flags
;
8032 /* Function to do blocking read of one byte, needed to implement
8033 select. It is only allowed on communication ports, sockets, or
8036 _sys_read_ahead (int fd
)
8041 if (fd
< 0 || fd
>= MAXDESC
)
8042 return STATUS_READ_ERROR
;
8044 cp
= fd_info
[fd
].cp
;
8046 if (cp
== NULL
|| cp
->fd
!= fd
|| cp
->status
!= STATUS_READ_READY
)
8047 return STATUS_READ_ERROR
;
8049 if ((fd_info
[fd
].flags
& (FILE_PIPE
| FILE_SERIAL
| FILE_SOCKET
)) == 0
8050 || (fd_info
[fd
].flags
& FILE_READ
) == 0)
8052 DebPrint (("_sys_read_ahead: internal error: fd %d is not a pipe, serial port, or socket!\n", fd
));
8056 if ((fd_info
[fd
].flags
& FILE_CONNECT
) != 0)
8057 DebPrint (("_sys_read_ahead: read requested from fd %d, which waits for async connect!\n", fd
));
8058 cp
->status
= STATUS_READ_IN_PROGRESS
;
8060 if (fd_info
[fd
].flags
& FILE_PIPE
)
8062 rc
= _read (fd
, &cp
->chr
, sizeof (char));
8064 /* Give subprocess time to buffer some more output for us before
8065 reporting that input is available; we need this because Windows 95
8066 connects DOS programs to pipes by making the pipe appear to be
8067 the normal console stdout - as a result most DOS programs will
8068 write to stdout without buffering, ie. one character at a
8069 time. Even some W32 programs do this - "dir" in a command
8070 shell on NT is very slow if we don't do this. */
8073 int wait
= w32_pipe_read_delay
;
8079 /* Yield remainder of our time slice, effectively giving a
8080 temporary priority boost to the child process. */
8084 else if (fd_info
[fd
].flags
& FILE_SERIAL
)
8086 HANDLE hnd
= fd_info
[fd
].hnd
;
8087 OVERLAPPED
*ovl
= &fd_info
[fd
].cp
->ovl_read
;
8090 /* Configure timeouts for blocking read. */
8091 if (!GetCommTimeouts (hnd
, &ct
))
8093 cp
->status
= STATUS_READ_ERROR
;
8094 return STATUS_READ_ERROR
;
8096 ct
.ReadIntervalTimeout
= 0;
8097 ct
.ReadTotalTimeoutMultiplier
= 0;
8098 ct
.ReadTotalTimeoutConstant
= 0;
8099 if (!SetCommTimeouts (hnd
, &ct
))
8101 cp
->status
= STATUS_READ_ERROR
;
8102 return STATUS_READ_ERROR
;
8105 if (!ReadFile (hnd
, &cp
->chr
, sizeof (char), (DWORD
*) &rc
, ovl
))
8107 if (GetLastError () != ERROR_IO_PENDING
)
8109 cp
->status
= STATUS_READ_ERROR
;
8110 return STATUS_READ_ERROR
;
8112 if (!GetOverlappedResult (hnd
, ovl
, (DWORD
*) &rc
, TRUE
))
8114 cp
->status
= STATUS_READ_ERROR
;
8115 return STATUS_READ_ERROR
;
8119 else if (fd_info
[fd
].flags
& FILE_SOCKET
)
8121 unsigned long nblock
= 0;
8122 /* We always want this to block, so temporarily disable NDELAY. */
8123 if (fd_info
[fd
].flags
& FILE_NDELAY
)
8124 pfn_ioctlsocket (SOCK_HANDLE (fd
), FIONBIO
, &nblock
);
8126 rc
= pfn_recv (SOCK_HANDLE (fd
), &cp
->chr
, sizeof (char), 0);
8128 if (fd_info
[fd
].flags
& FILE_NDELAY
)
8131 pfn_ioctlsocket (SOCK_HANDLE (fd
), FIONBIO
, &nblock
);
8135 if (rc
== sizeof (char))
8136 cp
->status
= STATUS_READ_SUCCEEDED
;
8138 cp
->status
= STATUS_READ_FAILED
;
8144 _sys_wait_accept (int fd
)
8150 if (fd
< 0 || fd
>= MAXDESC
)
8151 return STATUS_READ_ERROR
;
8153 cp
= fd_info
[fd
].cp
;
8155 if (cp
== NULL
|| cp
->fd
!= fd
|| cp
->status
!= STATUS_READ_READY
)
8156 return STATUS_READ_ERROR
;
8158 cp
->status
= STATUS_READ_FAILED
;
8160 hEv
= pfn_WSACreateEvent ();
8161 rc
= pfn_WSAEventSelect (SOCK_HANDLE (fd
), hEv
, FD_ACCEPT
);
8162 if (rc
!= SOCKET_ERROR
)
8165 rc
= WaitForSingleObject (hEv
, 500);
8167 } while (rc
== WAIT_TIMEOUT
8168 && cp
->status
!= STATUS_READ_ERROR
8170 pfn_WSAEventSelect (SOCK_HANDLE (fd
), NULL
, 0);
8171 if (rc
== WAIT_OBJECT_0
)
8172 cp
->status
= STATUS_READ_SUCCEEDED
;
8174 pfn_WSACloseEvent (hEv
);
8180 _sys_wait_connect (int fd
)
8186 if (fd
< 0 || fd
>= MAXDESC
)
8187 return STATUS_READ_ERROR
;
8189 cp
= fd_info
[fd
].cp
;
8190 if (cp
== NULL
|| cp
->fd
!= fd
|| cp
->status
!= STATUS_READ_READY
)
8191 return STATUS_READ_ERROR
;
8193 cp
->status
= STATUS_READ_FAILED
;
8195 hEv
= pfn_WSACreateEvent ();
8196 rc
= pfn_WSAEventSelect (SOCK_HANDLE (fd
), hEv
, FD_CONNECT
);
8197 if (rc
!= SOCKET_ERROR
)
8200 rc
= WaitForSingleObject (hEv
, 500);
8202 } while (rc
== WAIT_TIMEOUT
8203 && cp
->status
!= STATUS_READ_ERROR
8205 if (rc
== WAIT_OBJECT_0
)
8207 /* We've got an event, but it could be a successful
8208 connection, or it could be a failure. Find out
8210 WSANETWORKEVENTS events
;
8212 pfn_WSAEnumNetworkEvents (SOCK_HANDLE (fd
), hEv
, &events
);
8213 if ((events
.lNetworkEvents
& FD_CONNECT
) != 0
8214 && events
.iErrorCode
[FD_CONNECT_BIT
])
8216 cp
->status
= STATUS_CONNECT_FAILED
;
8217 cp
->errcode
= events
.iErrorCode
[FD_CONNECT_BIT
];
8221 cp
->status
= STATUS_READ_SUCCEEDED
;
8225 pfn_WSAEventSelect (SOCK_HANDLE (fd
), NULL
, 0);
8228 pfn_WSACloseEvent (hEv
);
8234 sys_read (int fd
, char * buffer
, unsigned int count
)
8239 char * orig_buffer
= buffer
;
8247 if (fd
< MAXDESC
&& fd_info
[fd
].flags
& (FILE_PIPE
| FILE_SOCKET
| FILE_SERIAL
))
8249 child_process
*cp
= fd_info
[fd
].cp
;
8251 if ((fd_info
[fd
].flags
& FILE_READ
) == 0)
8259 /* re-read CR carried over from last read */
8260 if (fd_info
[fd
].flags
& FILE_LAST_CR
)
8262 if (fd_info
[fd
].flags
& FILE_BINARY
) emacs_abort ();
8266 fd_info
[fd
].flags
&= ~FILE_LAST_CR
;
8269 /* presence of a child_process structure means we are operating in
8270 non-blocking mode - otherwise we just call _read directly.
8271 Note that the child_process structure might be missing because
8272 reap_subprocess has been called; in this case the pipe is
8273 already broken, so calling _read on it is okay. */
8276 int current_status
= cp
->status
;
8278 switch (current_status
)
8280 case STATUS_READ_FAILED
:
8281 case STATUS_READ_ERROR
:
8282 /* report normal EOF if nothing in buffer */
8284 fd_info
[fd
].flags
|= FILE_AT_EOF
;
8287 case STATUS_READ_READY
:
8288 case STATUS_READ_IN_PROGRESS
:
8289 DebPrint (("sys_read called when read is in progress\n"));
8290 errno
= EWOULDBLOCK
;
8293 case STATUS_READ_SUCCEEDED
:
8294 /* consume read-ahead char */
8295 *buffer
++ = cp
->chr
;
8298 cp
->status
= STATUS_READ_ACKNOWLEDGED
;
8299 ResetEvent (cp
->char_avail
);
8301 case STATUS_READ_ACKNOWLEDGED
:
8302 case STATUS_CONNECT_FAILED
:
8306 DebPrint (("sys_read: bad status %d\n", current_status
));
8311 if (fd_info
[fd
].flags
& FILE_PIPE
)
8313 PeekNamedPipe ((HANDLE
) _get_osfhandle (fd
), NULL
, 0, NULL
, &waiting
, NULL
);
8314 to_read
= min (waiting
, (DWORD
) count
);
8317 nchars
+= _read (fd
, buffer
, to_read
);
8319 else if (fd_info
[fd
].flags
& FILE_SERIAL
)
8321 HANDLE hnd
= fd_info
[fd
].hnd
;
8322 OVERLAPPED
*ovl
= &fd_info
[fd
].cp
->ovl_read
;
8328 /* Configure timeouts for non-blocking read. */
8329 if (!GetCommTimeouts (hnd
, &ct
))
8334 ct
.ReadIntervalTimeout
= MAXDWORD
;
8335 ct
.ReadTotalTimeoutMultiplier
= 0;
8336 ct
.ReadTotalTimeoutConstant
= 0;
8337 if (!SetCommTimeouts (hnd
, &ct
))
8343 if (!ResetEvent (ovl
->hEvent
))
8348 if (!ReadFile (hnd
, buffer
, count
, (DWORD
*) &rc
, ovl
))
8350 if (GetLastError () != ERROR_IO_PENDING
)
8355 if (!GetOverlappedResult (hnd
, ovl
, (DWORD
*) &rc
, TRUE
))
8364 else /* FILE_SOCKET */
8366 if (winsock_lib
== NULL
) emacs_abort ();
8368 /* When a non-blocking 'connect' call fails,
8369 wait_reading_process_output detects this by calling
8370 'getpeername', and then attempts to obtain the connection
8371 error code by trying to read 1 byte from the socket. If
8372 we try to serve that read by calling 'recv' below, the
8373 error we get is a generic WSAENOTCONN, not the actual
8374 connection error. So instead, we use the actual error
8375 code stashed by '_sys_wait_connect' in cp->errcode.
8376 Alternatively, we could have used 'getsockopt', like on
8377 GNU/Linux, but: (a) I have no idea whether the winsock
8378 version could hang, as it does "on some systems" (see the
8379 comment in process.c); and (b) 'getsockopt' on Windows is
8380 documented to clear the socket error for the entire
8381 process, which I'm not sure is TRT; FIXME. */
8382 if (current_status
== STATUS_CONNECT_FAILED
8383 && (fd_info
[fd
].flags
& FILE_CONNECT
) != 0
8384 && cp
->errcode
!= 0)
8386 pfn_WSASetLastError (cp
->errcode
);
8390 /* Do the equivalent of a non-blocking read. */
8391 pfn_ioctlsocket (SOCK_HANDLE (fd
), FIONREAD
, &waiting
);
8392 if (waiting
== 0 && nchars
== 0)
8394 errno
= EWOULDBLOCK
;
8400 /* always use binary mode for sockets */
8401 int res
= pfn_recv (SOCK_HANDLE (fd
), buffer
, count
, 0);
8402 if (res
== SOCKET_ERROR
)
8405 DebPrint (("sys_read.recv failed with error %d on socket %ld\n",
8406 errno
, SOCK_HANDLE (fd
)));
8415 int nread
= _read (fd
, buffer
, count
);
8418 else if (nchars
== 0)
8423 fd_info
[fd
].flags
|= FILE_AT_EOF
;
8424 /* Perform text mode translation if required. */
8425 else if ((fd_info
[fd
].flags
& FILE_BINARY
) == 0)
8427 nchars
= crlf_to_lf (nchars
, orig_buffer
);
8428 /* If buffer contains only CR, return that. To be absolutely
8429 sure we should attempt to read the next char, but in
8430 practice a CR to be followed by LF would not appear by
8431 itself in the buffer. */
8432 if (nchars
> 1 && orig_buffer
[nchars
- 1] == 0x0d)
8434 fd_info
[fd
].flags
|= FILE_LAST_CR
;
8440 nchars
= _read (fd
, buffer
, count
);
8445 /* From w32xfns.c */
8446 extern HANDLE interrupt_handle
;
8449 sys_write (int fd
, const void * buffer
, unsigned int count
)
8460 if (fd
< MAXDESC
&& fd_info
[fd
].flags
& (FILE_PIPE
| FILE_SOCKET
| FILE_SERIAL
))
8462 if ((fd_info
[fd
].flags
& FILE_WRITE
) == 0)
8468 /* Perform text mode translation if required. */
8469 if ((fd_info
[fd
].flags
& FILE_BINARY
) == 0)
8472 const unsigned char * src
= buffer
;
8473 unsigned char * dst
;
8476 SAFE_NALLOCA (tmpbuf
, 2, count
);
8481 unsigned char *next
;
8482 /* Copy next line or remaining bytes. */
8483 next
= _memccpy (dst
, src
, '\n', nbytes
);
8486 /* Copied one line ending with '\n'. */
8487 int copied
= next
- dst
;
8490 /* Insert '\r' before '\n'. */
8497 /* Copied remaining partial line -> now finished. */
8504 if (fd
< MAXDESC
&& fd_info
[fd
].flags
& FILE_SERIAL
)
8506 HANDLE hnd
= (HANDLE
) _get_osfhandle (fd
);
8507 OVERLAPPED
*ovl
= &fd_info
[fd
].cp
->ovl_write
;
8508 HANDLE wait_hnd
[2] = { interrupt_handle
, ovl
->hEvent
};
8511 /* This is async (a.k.a. "overlapped") I/O, so the return value
8512 of FALSE from WriteFile means either an error or the output
8513 will be completed asynchronously (ERROR_IO_PENDING). */
8514 if (!WriteFile (hnd
, buffer
, count
, (DWORD
*) &nchars
, ovl
))
8516 if (GetLastError () != ERROR_IO_PENDING
)
8523 /* Wait for the write to complete, and watch C-g while
8525 if (detect_input_pending ())
8526 active
= MsgWaitForMultipleObjects (2, wait_hnd
, FALSE
,
8527 INFINITE
, QS_ALLINPUT
);
8529 active
= WaitForMultipleObjects (2, wait_hnd
, FALSE
, INFINITE
);
8533 /* User pressed C-g, cancel write, then leave.
8534 Don't bother cleaning up as we may only get stuck
8535 in buggy drivers. */
8536 PurgeComm (hnd
, PURGE_TXABORT
| PURGE_TXCLEAR
);
8538 errno
= EIO
; /* Why not EINTR? */
8541 case WAIT_OBJECT_0
+ 1:
8542 if (!GetOverlappedResult (hnd
, ovl
, (DWORD
*) &nchars
, TRUE
))
8552 else if (fd
< MAXDESC
&& fd_info
[fd
].flags
& FILE_SOCKET
)
8554 unsigned long nblock
= 0;
8555 if (winsock_lib
== NULL
) emacs_abort ();
8557 /* TODO: implement select() properly so non-blocking I/O works. */
8558 /* For now, make sure the write blocks. */
8559 if (fd_info
[fd
].flags
& FILE_NDELAY
)
8560 pfn_ioctlsocket (SOCK_HANDLE (fd
), FIONBIO
, &nblock
);
8562 nchars
= pfn_send (SOCK_HANDLE (fd
), buffer
, count
, 0);
8564 /* Set the socket back to non-blocking if it was before,
8565 for other operations that support it. */
8566 if (fd_info
[fd
].flags
& FILE_NDELAY
)
8569 pfn_ioctlsocket (SOCK_HANDLE (fd
), FIONBIO
, &nblock
);
8572 if (nchars
== SOCKET_ERROR
)
8574 DebPrint (("sys_write.send failed with error %d on socket %ld\n",
8575 pfn_WSAGetLastError (), SOCK_HANDLE (fd
)));
8581 /* Some networked filesystems don't like too large writes, so
8582 break them into smaller chunks. See the Comments section of
8583 the MSDN documentation of WriteFile for details behind the
8584 choice of the value of CHUNK below. See also the thread
8585 http://thread.gmane.org/gmane.comp.version-control.git/145294
8586 in the git mailing list. */
8587 const unsigned char *p
= buffer
;
8588 const unsigned chunk
= 30 * 1024 * 1024;
8593 unsigned this_chunk
= count
< chunk
? count
: chunk
;
8594 int n
= _write (fd
, p
, this_chunk
);
8599 /* When there's no buffer space in a pipe that is in the
8600 non-blocking mode, _write returns ENOSPC. We return
8601 EAGAIN instead, which should trigger the logic in
8602 send_process that enters waiting loop and calls
8603 wait_reading_process_output to allow process input to
8604 be accepted during the wait. Those calls to
8605 wait_reading_process_output allow sys_select to
8606 notice when process input becomes available, thus
8607 avoiding deadlock whereby each side of the pipe is
8608 blocked on write, waiting for the other party to read
8609 its end of the pipe. */
8612 && ((fd_info
[fd
].flags
& (FILE_PIPE
| FILE_NDELAY
))
8613 == (FILE_PIPE
| FILE_NDELAY
)))
8618 else if (n
< this_chunk
)
8630 /* Emulation of SIOCGIFCONF and getifaddrs, see process.c. */
8632 extern Lisp_Object
conv_sockaddr_to_lisp (struct sockaddr
*, int);
8634 /* Return information about network interface IFNAME, or about all
8635 interfaces (if IFNAME is nil). */
8637 network_interface_get_info (Lisp_Object ifname
)
8639 ULONG ainfo_len
= sizeof (IP_ADAPTER_INFO
);
8640 IP_ADAPTER_INFO
*adapter
, *ainfo
= xmalloc (ainfo_len
);
8641 DWORD retval
= get_adapters_info (ainfo
, &ainfo_len
);
8642 Lisp_Object res
= Qnil
;
8644 if (retval
== ERROR_BUFFER_OVERFLOW
)
8646 ainfo
= xrealloc (ainfo
, ainfo_len
);
8647 retval
= get_adapters_info (ainfo
, &ainfo_len
);
8650 if (retval
== ERROR_SUCCESS
)
8652 int eth_count
= 0, tr_count
= 0, fddi_count
= 0, ppp_count
= 0;
8653 int sl_count
= 0, wlan_count
= 0, lo_count
= 0, ifx_count
= 0;
8655 struct sockaddr_in sa
;
8657 /* For the below, we need some winsock functions, so make sure
8658 the winsock DLL is loaded. If we cannot successfully load
8659 it, they will have no use of the information we provide,
8661 if (!winsock_lib
&& !init_winsock (1))
8664 for (adapter
= ainfo
; adapter
; adapter
= adapter
->Next
)
8666 char namebuf
[MAX_ADAPTER_NAME_LENGTH
+ 4];
8668 /* Present Unix-compatible interface names, instead of the
8669 Windows names, which are really GUIDs not readable by
8671 static const char *ifmt
[] = {
8672 "eth%d", "tr%d", "fddi%d", "ppp%d", "sl%d", "wlan%d",
8687 switch (adapter
->Type
)
8689 case MIB_IF_TYPE_ETHERNET
:
8690 /* Windows before Vista reports wireless adapters as
8691 Ethernet. Work around by looking at the Description
8693 if (strstr (adapter
->Description
, "Wireless "))
8696 if_num
= wlan_count
++;
8700 ifmt_idx
= ETHERNET
;
8701 if_num
= eth_count
++;
8704 case MIB_IF_TYPE_TOKENRING
:
8705 ifmt_idx
= TOKENRING
;
8706 if_num
= tr_count
++;
8708 case MIB_IF_TYPE_FDDI
:
8710 if_num
= fddi_count
++;
8712 case MIB_IF_TYPE_PPP
:
8714 if_num
= ppp_count
++;
8716 case MIB_IF_TYPE_SLIP
:
8718 if_num
= sl_count
++;
8720 case IF_TYPE_IEEE80211
:
8722 if_num
= wlan_count
++;
8724 case MIB_IF_TYPE_LOOPBACK
:
8727 ifmt_idx
= LOOPBACK
;
8728 if_num
= lo_count
++;
8734 ifmt_idx
= OTHER_IF
;
8735 if_num
= ifx_count
++;
8738 if (ifmt_idx
== NONE
)
8740 sprintf (namebuf
, ifmt
[ifmt_idx
], if_num
);
8742 sa
.sin_family
= AF_INET
;
8743 ip_addr
= sys_inet_addr (adapter
->IpAddressList
.IpAddress
.String
);
8744 if (ip_addr
== INADDR_NONE
)
8746 /* Bogus address, skip this interface. */
8749 sa
.sin_addr
.s_addr
= ip_addr
;
8752 res
= Fcons (Fcons (build_string (namebuf
),
8753 conv_sockaddr_to_lisp ((struct sockaddr
*) &sa
,
8754 sizeof (struct sockaddr
))),
8756 else if (strcmp (namebuf
, SSDATA (ifname
)) == 0)
8758 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
8759 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
8760 Lisp_Object flags
= Qnil
;
8764 /* Flags. We guess most of them by type, since the
8765 Windows flags are different and hard to get by. */
8766 flags
= Fcons (intern ("up"), flags
);
8767 if (ifmt_idx
== ETHERNET
|| ifmt_idx
== WLAN
)
8769 flags
= Fcons (intern ("broadcast"), flags
);
8770 flags
= Fcons (intern ("multicast"), flags
);
8772 flags
= Fcons (intern ("running"), flags
);
8773 if (ifmt_idx
== PPP
)
8775 flags
= Fcons (intern ("pointopoint"), flags
);
8776 flags
= Fcons (intern ("noarp"), flags
);
8778 if (adapter
->HaveWins
)
8779 flags
= Fcons (intern ("WINS"), flags
);
8780 if (adapter
->DhcpEnabled
)
8781 flags
= Fcons (intern ("dynamic"), flags
);
8783 res
= Fcons (flags
, res
);
8785 /* Hardware address and its family. */
8786 for (n
= 0; n
< adapter
->AddressLength
; n
++)
8787 p
->contents
[n
] = make_number ((int) adapter
->Address
[n
]);
8788 /* Windows does not support AF_LINK or AF_PACKET family
8789 of addresses. Use an arbitrary family number that is
8790 identical to what GNU/Linux returns. */
8791 res
= Fcons (Fcons (make_number (1), hwaddr
), res
);
8794 sa
.sin_family
= AF_INET
;
8795 net_mask
= sys_inet_addr (adapter
->IpAddressList
.IpMask
.String
);
8796 if (net_mask
!= INADDR_NONE
)
8798 sa
.sin_addr
.s_addr
= net_mask
;
8800 res
= Fcons (conv_sockaddr_to_lisp ((struct sockaddr
*) &sa
,
8801 sizeof (struct sockaddr
)),
8805 res
= Fcons (Qnil
, res
);
8807 sa
.sin_family
= AF_INET
;
8808 if (ip_addr
!= INADDR_NONE
)
8810 /* Broadcast address is only reported by
8811 GetAdaptersAddresses, which is of limited
8812 availability. Generate it on our own. */
8813 u_long bcast_addr
= (ip_addr
& net_mask
) | ~net_mask
;
8815 sa
.sin_addr
.s_addr
= bcast_addr
;
8817 res
= Fcons (conv_sockaddr_to_lisp ((struct sockaddr
*) &sa
,
8818 sizeof (struct sockaddr
)),
8822 sa
.sin_addr
.s_addr
= ip_addr
;
8824 res
= Fcons (conv_sockaddr_to_lisp ((struct sockaddr
*) &sa
,
8825 sizeof (struct sockaddr
)),
8829 res
= Fcons (Qnil
, Fcons (Qnil
, res
));
8832 /* GetAdaptersInfo is documented to not report loopback
8833 interfaces, so we generate one out of thin air. */
8836 sa
.sin_family
= AF_INET
;
8840 sa
.sin_addr
.s_addr
= sys_inet_addr ("127.0.0.1");
8841 res
= Fcons (Fcons (build_string ("lo"),
8842 conv_sockaddr_to_lisp ((struct sockaddr
*) &sa
,
8843 sizeof (struct sockaddr
))),
8846 else if (strcmp (SSDATA (ifname
), "lo") == 0)
8848 res
= Fcons (Fcons (intern ("running"),
8849 Fcons (intern ("loopback"),
8850 Fcons (intern ("up"), Qnil
))), Qnil
);
8851 /* 772 is what 3 different GNU/Linux systems report for
8852 the loopback interface. */
8853 res
= Fcons (Fcons (make_number (772),
8854 Fmake_vector (make_number (6),
8857 sa
.sin_addr
.s_addr
= sys_inet_addr ("255.0.0.0");
8858 res
= Fcons (conv_sockaddr_to_lisp ((struct sockaddr
*) &sa
,
8859 sizeof (struct sockaddr
)),
8861 sa
.sin_addr
.s_addr
= sys_inet_addr ("0.0.0.0");
8862 res
= Fcons (conv_sockaddr_to_lisp ((struct sockaddr
*) &sa
,
8863 sizeof (struct sockaddr
)),
8865 sa
.sin_addr
.s_addr
= sys_inet_addr ("127.0.0.1");
8866 res
= Fcons (conv_sockaddr_to_lisp ((struct sockaddr
*) &sa
,
8867 sizeof (struct sockaddr
)),
8880 network_interface_list (void)
8882 return network_interface_get_info (Qnil
);
8886 network_interface_info (Lisp_Object ifname
)
8888 CHECK_STRING (ifname
);
8889 return network_interface_get_info (ifname
);
8893 /* The Windows CRT functions are "optimized for speed", so they don't
8894 check for timezone and DST changes if they were last called less
8895 than 1 minute ago (see http://support.microsoft.com/kb/821231). So
8896 all Emacs features that repeatedly call time functions (e.g.,
8897 display-time) are in real danger of missing timezone and DST
8898 changes. Calling tzset before each localtime call fixes that. */
8900 sys_localtime (const time_t *t
)
8903 return localtime (t
);
8908 /* Try loading LIBRARY_ID from the file(s) specified in
8909 Vdynamic_library_alist. If the library is loaded successfully,
8910 return the handle of the DLL, and record the filename in the
8911 property :loaded-from of LIBRARY_ID. If the library could not be
8912 found, or when it was already loaded (because the handle is not
8913 recorded anywhere, and so is lost after use), return NULL.
8915 We could also save the handle in :loaded-from, but currently
8916 there's no use case for it. */
8918 w32_delayed_load (Lisp_Object library_id
)
8920 HMODULE dll_handle
= NULL
;
8922 CHECK_SYMBOL (library_id
);
8924 if (CONSP (Vdynamic_library_alist
)
8925 && NILP (Fassq (library_id
, Vlibrary_cache
)))
8927 Lisp_Object found
= Qnil
;
8928 Lisp_Object dlls
= Fassq (library_id
, Vdynamic_library_alist
);
8931 for (dlls
= XCDR (dlls
); CONSP (dlls
); dlls
= XCDR (dlls
))
8933 Lisp_Object dll
= XCAR (dlls
);
8934 char name
[MAX_UTF8_PATH
];
8938 dll
= ENCODE_FILE (dll
);
8939 if (w32_unicode_filenames
)
8941 wchar_t name_w
[MAX_PATH
];
8943 filename_to_utf16 (SSDATA (dll
), name_w
);
8944 dll_handle
= LoadLibraryW (name_w
);
8947 res
= GetModuleFileNameW (dll_handle
, name_w
,
8950 filename_from_utf16 (name_w
, name
);
8955 char name_a
[MAX_PATH
];
8957 filename_to_ansi (SSDATA (dll
), name_a
);
8958 dll_handle
= LoadLibraryA (name_a
);
8961 res
= GetModuleFileNameA (dll_handle
, name_a
,
8964 filename_from_ansi (name_a
, name
);
8969 ptrdiff_t len
= strlen (name
);
8972 /* Possibly truncated */
8973 ? make_specified_string (name
, -1, len
, 1)
8975 /* This prevents thread start and end notifications
8976 from being sent to the DLL, for every thread we
8977 start. We don't need those notifications because
8978 threads we create never use any of these DLLs, only
8979 the main thread uses them. This is supposed to
8980 speed up thread creation. */
8981 DisableThreadLibraryCalls (dll_handle
);
8986 Fput (library_id
, QCloaded_from
, found
);
8994 check_windows_init_file (void)
8996 /* A common indication that Emacs is not installed properly is when
8997 it cannot find the Windows installation file. If this file does
8998 not exist in the expected place, tell the user. */
9000 if (!noninteractive
&& !inhibit_window_system
9001 /* Vload_path is not yet initialized when we are loading
9003 && NILP (Vpurify_flag
))
9005 Lisp_Object init_file
;
9008 /* Implementation note: this function runs early during Emacs
9009 startup, before startup.el is run. So Vload_path is still in
9010 its initial unibyte form, but it holds UTF-8 encoded file
9011 names, since init_callproc was already called. So we do not
9012 need to ENCODE_FILE here, but we do need to convert the file
9013 names from UTF-8 to ANSI. */
9014 init_file
= build_string ("term/w32-win");
9015 fd
= openp (Vload_path
, init_file
, Fget_load_suffixes (), NULL
, Qnil
, 0);
9018 Lisp_Object load_path_print
= Fprin1_to_string (Vload_path
, Qnil
);
9019 char *init_file_name
= SDATA (init_file
);
9020 char *load_path
= SDATA (load_path_print
);
9021 char *buffer
= alloca (1024
9022 + strlen (init_file_name
)
9023 + strlen (load_path
));
9028 "The Emacs Windows initialization file \"%s.el\" "
9029 "could not be found in your Emacs installation. "
9030 "Emacs checked the following directories for this file:\n"
9032 "When Emacs cannot find this file, it usually means that it "
9033 "was not installed properly, or its distribution file was "
9034 "not unpacked properly.\nSee the README.W32 file in the "
9035 "top-level Emacs directory for more information.",
9036 init_file_name
, load_path
);
9037 needed
= pMultiByteToWideChar (CP_UTF8
, MB_ERR_INVALID_CHARS
, buffer
,
9041 wchar_t *msg_w
= alloca ((needed
+ 1) * sizeof (wchar_t));
9043 pMultiByteToWideChar (CP_UTF8
, MB_ERR_INVALID_CHARS
, buffer
, -1,
9045 needed
= pWideCharToMultiByte (CP_ACP
, 0, msg_w
, -1,
9046 NULL
, 0, NULL
, NULL
);
9049 char *msg_a
= alloca (needed
+ 1);
9051 pWideCharToMultiByte (CP_ACP
, 0, msg_w
, -1, msg_a
, needed
,
9058 "Emacs Abort Dialog",
9059 MB_OK
| MB_ICONEXCLAMATION
| MB_TASKMODAL
);
9060 /* Use the low-level system abort. */
9071 term_ntproc (int ignored
)
9077 /* shutdown the socket interface if necessary */
9084 init_ntproc (int dumping
)
9086 sigset_t initial_mask
= 0;
9088 /* Initialize the socket interface now if available and requested by
9089 the user by defining PRELOAD_WINSOCK; otherwise loading will be
9090 delayed until open-network-stream is called (w32-has-winsock can
9091 also be used to dynamically load or reload winsock).
9093 Conveniently, init_environment is called before us, so
9094 PRELOAD_WINSOCK can be set in the registry. */
9096 /* Always initialize this correctly. */
9099 if (getenv ("PRELOAD_WINSOCK") != NULL
)
9100 init_winsock (TRUE
);
9102 /* Initial preparation for subprocess support: replace our standard
9103 handles with non-inheritable versions. */
9106 HANDLE stdin_save
= INVALID_HANDLE_VALUE
;
9107 HANDLE stdout_save
= INVALID_HANDLE_VALUE
;
9108 HANDLE stderr_save
= INVALID_HANDLE_VALUE
;
9110 parent
= GetCurrentProcess ();
9112 /* ignore errors when duplicating and closing; typically the
9113 handles will be invalid when running as a gui program. */
9114 DuplicateHandle (parent
,
9115 GetStdHandle (STD_INPUT_HANDLE
),
9120 DUPLICATE_SAME_ACCESS
);
9122 DuplicateHandle (parent
,
9123 GetStdHandle (STD_OUTPUT_HANDLE
),
9128 DUPLICATE_SAME_ACCESS
);
9130 DuplicateHandle (parent
,
9131 GetStdHandle (STD_ERROR_HANDLE
),
9136 DUPLICATE_SAME_ACCESS
);
9142 if (stdin_save
!= INVALID_HANDLE_VALUE
)
9143 _open_osfhandle ((intptr_t) stdin_save
, O_TEXT
);
9145 _open ("nul", O_TEXT
| O_NOINHERIT
| O_RDONLY
);
9148 if (stdout_save
!= INVALID_HANDLE_VALUE
)
9149 _open_osfhandle ((intptr_t) stdout_save
, O_TEXT
);
9151 _open ("nul", O_TEXT
| O_NOINHERIT
| O_WRONLY
);
9154 if (stderr_save
!= INVALID_HANDLE_VALUE
)
9155 _open_osfhandle ((intptr_t) stderr_save
, O_TEXT
);
9157 _open ("nul", O_TEXT
| O_NOINHERIT
| O_WRONLY
);
9161 /* unfortunately, atexit depends on implementation of malloc */
9162 /* atexit (term_ntproc); */
9165 /* Make sure we start with all signals unblocked. */
9166 sigprocmask (SIG_SETMASK
, &initial_mask
, NULL
);
9167 signal (SIGABRT
, term_ntproc
);
9171 /* determine which drives are fixed, for GetCachedVolumeInformation */
9173 /* GetDriveType must have trailing backslash. */
9174 char drive
[] = "A:\\";
9176 /* Loop over all possible drive letters */
9177 while (*drive
<= 'Z')
9179 /* Record if this drive letter refers to a fixed drive. */
9180 fixed_drives
[DRIVE_INDEX (*drive
)] =
9181 (GetDriveType (drive
) == DRIVE_FIXED
);
9186 /* Reset the volume info cache. */
9187 volume_cache
= NULL
;
9192 shutdown_handler ensures that buffers' autosave files are
9193 up to date when the user logs off, or the system shuts down.
9196 shutdown_handler (DWORD type
)
9198 /* Ctrl-C and Ctrl-Break are already suppressed, so don't handle them. */
9199 if (type
== CTRL_CLOSE_EVENT
/* User closes console window. */
9200 || type
== CTRL_LOGOFF_EVENT
/* User logs off. */
9201 || type
== CTRL_SHUTDOWN_EVENT
) /* User shutsdown. */
9203 /* Shut down cleanly, making sure autosave files are up to date. */
9204 shut_down_emacs (0, Qnil
);
9207 /* Allow other handlers to handle this signal. */
9211 /* On Windows 9X, load UNICOWS.DLL and return its handle, or die. On
9212 NT, return a handle to GDI32.DLL. */
9214 maybe_load_unicows_dll (void)
9216 if (os_subtype
== OS_9X
)
9218 HANDLE ret
= LoadLibrary ("Unicows.dll");
9221 /* These two functions are present on Windows 9X as stubs
9222 that always fail. We need the real implementations from
9223 UNICOWS.DLL, so we must call these functions through
9224 pointers, and assign the correct addresses to these
9225 pointers at program startup (see emacs.c, which calls
9226 this function early on). */
9227 pMultiByteToWideChar
= GetProcAddress (ret
, "MultiByteToWideChar");
9228 pWideCharToMultiByte
= GetProcAddress (ret
, "WideCharToMultiByte");
9235 button
= MessageBox (NULL
,
9236 "Emacs cannot load the UNICOWS.DLL library.\n"
9237 "This library is essential for using Emacs\n"
9238 "on this system. You need to install it.\n\n"
9239 "Emacs will exit when you click OK.",
9240 "Emacs cannot load UNICOWS.DLL",
9241 MB_ICONERROR
| MB_TASKMODAL
9242 | MB_SETFOREGROUND
| MB_OK
);
9253 /* On NT family of Windows, these two functions are always
9254 linked in, so we just assign their addresses to the 2
9255 pointers; no need for the LoadLibrary dance. */
9256 pMultiByteToWideChar
= MultiByteToWideChar
;
9257 pWideCharToMultiByte
= WideCharToMultiByte
;
9258 return LoadLibrary ("Gdi32.dll");
9263 globals_of_w32 is used to initialize those global variables that
9264 must always be initialized on startup even when the global variable
9265 initialized is non zero (see the function main in emacs.c).
9268 globals_of_w32 (void)
9270 HMODULE kernel32
= GetModuleHandle ("kernel32.dll");
9272 get_process_times_fn
= (GetProcessTimes_Proc
)
9273 GetProcAddress (kernel32
, "GetProcessTimes");
9275 DEFSYM (QCloaded_from
, ":loaded-from");
9277 g_b_init_is_windows_9x
= 0;
9278 g_b_init_open_process_token
= 0;
9279 g_b_init_get_token_information
= 0;
9280 g_b_init_lookup_account_sid
= 0;
9281 g_b_init_get_sid_sub_authority
= 0;
9282 g_b_init_get_sid_sub_authority_count
= 0;
9283 g_b_init_get_security_info
= 0;
9284 g_b_init_get_file_security_w
= 0;
9285 g_b_init_get_file_security_a
= 0;
9286 g_b_init_get_security_descriptor_owner
= 0;
9287 g_b_init_get_security_descriptor_group
= 0;
9288 g_b_init_is_valid_sid
= 0;
9289 g_b_init_create_toolhelp32_snapshot
= 0;
9290 g_b_init_process32_first
= 0;
9291 g_b_init_process32_next
= 0;
9292 g_b_init_open_thread_token
= 0;
9293 g_b_init_impersonate_self
= 0;
9294 g_b_init_revert_to_self
= 0;
9295 g_b_init_get_process_memory_info
= 0;
9296 g_b_init_get_process_working_set_size
= 0;
9297 g_b_init_global_memory_status
= 0;
9298 g_b_init_global_memory_status_ex
= 0;
9299 g_b_init_equal_sid
= 0;
9300 g_b_init_copy_sid
= 0;
9301 g_b_init_get_length_sid
= 0;
9302 g_b_init_get_native_system_info
= 0;
9303 g_b_init_get_system_times
= 0;
9304 g_b_init_create_symbolic_link_w
= 0;
9305 g_b_init_create_symbolic_link_a
= 0;
9306 g_b_init_get_security_descriptor_dacl
= 0;
9307 g_b_init_convert_sd_to_sddl
= 0;
9308 g_b_init_convert_sddl_to_sd
= 0;
9309 g_b_init_is_valid_security_descriptor
= 0;
9310 g_b_init_set_file_security_w
= 0;
9311 g_b_init_set_file_security_a
= 0;
9312 g_b_init_set_named_security_info_w
= 0;
9313 g_b_init_set_named_security_info_a
= 0;
9314 g_b_init_get_adapters_info
= 0;
9315 g_b_init_compare_string_w
= 0;
9316 num_of_processors
= 0;
9317 /* The following sets a handler for shutdown notifications for
9318 console apps. This actually applies to Emacs in both console and
9319 GUI modes, since we had to fool windows into thinking emacs is a
9320 console application to get console mode to work. */
9321 SetConsoleCtrlHandler (shutdown_handler
, TRUE
);
9323 /* "None" is the default group name on standalone workstations. */
9324 strcpy (dflt_group_name
, "None");
9326 /* Reset, in case it has some value inherited from dump time. */
9327 w32_stat_get_owner_group
= 0;
9329 /* If w32_unicode_filenames is non-zero, we will be using Unicode
9330 (a.k.a. "wide") APIs to invoke functions that accept file
9332 if (is_windows_9x ())
9333 w32_unicode_filenames
= 0;
9335 w32_unicode_filenames
= 1;
9338 /* For make-serial-process */
9340 serial_open (Lisp_Object port_obj
)
9342 char *port
= SSDATA (port_obj
);
9347 hnd
= CreateFile (port
, GENERIC_READ
| GENERIC_WRITE
, 0, 0,
9348 OPEN_EXISTING
, FILE_FLAG_OVERLAPPED
, 0);
9349 if (hnd
== INVALID_HANDLE_VALUE
)
9350 error ("Could not open %s", port
);
9351 fd
= (int) _open_osfhandle ((intptr_t) hnd
, 0);
9353 error ("Could not open %s", port
);
9357 error ("Could not create child process");
9359 cp
->status
= STATUS_READ_ACKNOWLEDGED
;
9360 fd_info
[ fd
].hnd
= hnd
;
9361 fd_info
[ fd
].flags
|=
9362 FILE_READ
| FILE_WRITE
| FILE_BINARY
| FILE_SERIAL
;
9363 if (fd_info
[ fd
].cp
!= NULL
)
9365 error ("fd_info[fd = %d] is already in use", fd
);
9367 fd_info
[ fd
].cp
= cp
;
9368 cp
->ovl_read
.hEvent
= CreateEvent (NULL
, TRUE
, FALSE
, NULL
);
9369 if (cp
->ovl_read
.hEvent
== NULL
)
9370 error ("Could not create read event");
9371 cp
->ovl_write
.hEvent
= CreateEvent (NULL
, TRUE
, FALSE
, NULL
);
9372 if (cp
->ovl_write
.hEvent
== NULL
)
9373 error ("Could not create write event");
9378 /* For serial-process-configure */
9380 serial_configure (struct Lisp_Process
*p
, Lisp_Object contact
)
9382 Lisp_Object childp2
= Qnil
;
9383 Lisp_Object tem
= Qnil
;
9387 char summary
[4] = "???"; /* This usually becomes "8N1". */
9389 if ((fd_info
[ p
->outfd
].flags
& FILE_SERIAL
) == 0)
9390 error ("Not a serial process");
9391 hnd
= fd_info
[ p
->outfd
].hnd
;
9393 childp2
= Fcopy_sequence (p
->childp
);
9395 /* Initialize timeouts for blocking read and blocking write. */
9396 if (!GetCommTimeouts (hnd
, &ct
))
9397 error ("GetCommTimeouts() failed");
9398 ct
.ReadIntervalTimeout
= 0;
9399 ct
.ReadTotalTimeoutMultiplier
= 0;
9400 ct
.ReadTotalTimeoutConstant
= 0;
9401 ct
.WriteTotalTimeoutMultiplier
= 0;
9402 ct
.WriteTotalTimeoutConstant
= 0;
9403 if (!SetCommTimeouts (hnd
, &ct
))
9404 error ("SetCommTimeouts() failed");
9405 /* Read port attributes and prepare default configuration. */
9406 memset (&dcb
, 0, sizeof (dcb
));
9407 dcb
.DCBlength
= sizeof (DCB
);
9408 if (!GetCommState (hnd
, &dcb
))
9409 error ("GetCommState() failed");
9412 dcb
.fAbortOnError
= FALSE
;
9413 /* dcb.XonLim and dcb.XoffLim are set by GetCommState() */
9418 /* Configure speed. */
9419 if (!NILP (Fplist_member (contact
, QCspeed
)))
9420 tem
= Fplist_get (contact
, QCspeed
);
9422 tem
= Fplist_get (p
->childp
, QCspeed
);
9424 dcb
.BaudRate
= XINT (tem
);
9425 childp2
= Fplist_put (childp2
, QCspeed
, tem
);
9427 /* Configure bytesize. */
9428 if (!NILP (Fplist_member (contact
, QCbytesize
)))
9429 tem
= Fplist_get (contact
, QCbytesize
);
9431 tem
= Fplist_get (p
->childp
, QCbytesize
);
9433 tem
= make_number (8);
9435 if (XINT (tem
) != 7 && XINT (tem
) != 8)
9436 error (":bytesize must be nil (8), 7, or 8");
9437 dcb
.ByteSize
= XINT (tem
);
9438 summary
[0] = XINT (tem
) + '0';
9439 childp2
= Fplist_put (childp2
, QCbytesize
, tem
);
9441 /* Configure parity. */
9442 if (!NILP (Fplist_member (contact
, QCparity
)))
9443 tem
= Fplist_get (contact
, QCparity
);
9445 tem
= Fplist_get (p
->childp
, QCparity
);
9446 if (!NILP (tem
) && !EQ (tem
, Qeven
) && !EQ (tem
, Qodd
))
9447 error (":parity must be nil (no parity), `even', or `odd'");
9448 dcb
.fParity
= FALSE
;
9449 dcb
.Parity
= NOPARITY
;
9450 dcb
.fErrorChar
= FALSE
;
9455 else if (EQ (tem
, Qeven
))
9459 dcb
.Parity
= EVENPARITY
;
9460 dcb
.fErrorChar
= TRUE
;
9462 else if (EQ (tem
, Qodd
))
9466 dcb
.Parity
= ODDPARITY
;
9467 dcb
.fErrorChar
= TRUE
;
9469 childp2
= Fplist_put (childp2
, QCparity
, tem
);
9471 /* Configure stopbits. */
9472 if (!NILP (Fplist_member (contact
, QCstopbits
)))
9473 tem
= Fplist_get (contact
, QCstopbits
);
9475 tem
= Fplist_get (p
->childp
, QCstopbits
);
9477 tem
= make_number (1);
9479 if (XINT (tem
) != 1 && XINT (tem
) != 2)
9480 error (":stopbits must be nil (1 stopbit), 1, or 2");
9481 summary
[2] = XINT (tem
) + '0';
9482 if (XINT (tem
) == 1)
9483 dcb
.StopBits
= ONESTOPBIT
;
9484 else if (XINT (tem
) == 2)
9485 dcb
.StopBits
= TWOSTOPBITS
;
9486 childp2
= Fplist_put (childp2
, QCstopbits
, tem
);
9488 /* Configure flowcontrol. */
9489 if (!NILP (Fplist_member (contact
, QCflowcontrol
)))
9490 tem
= Fplist_get (contact
, QCflowcontrol
);
9492 tem
= Fplist_get (p
->childp
, QCflowcontrol
);
9493 if (!NILP (tem
) && !EQ (tem
, Qhw
) && !EQ (tem
, Qsw
))
9494 error (":flowcontrol must be nil (no flowcontrol), `hw', or `sw'");
9495 dcb
.fOutxCtsFlow
= FALSE
;
9496 dcb
.fOutxDsrFlow
= FALSE
;
9497 dcb
.fDtrControl
= DTR_CONTROL_DISABLE
;
9498 dcb
.fDsrSensitivity
= FALSE
;
9499 dcb
.fTXContinueOnXoff
= FALSE
;
9502 dcb
.fRtsControl
= RTS_CONTROL_DISABLE
;
9503 dcb
.XonChar
= 17; /* Control-Q */
9504 dcb
.XoffChar
= 19; /* Control-S */
9507 /* Already configured. */
9509 else if (EQ (tem
, Qhw
))
9511 dcb
.fRtsControl
= RTS_CONTROL_HANDSHAKE
;
9512 dcb
.fOutxCtsFlow
= TRUE
;
9514 else if (EQ (tem
, Qsw
))
9519 childp2
= Fplist_put (childp2
, QCflowcontrol
, tem
);
9521 /* Activate configuration. */
9522 if (!SetCommState (hnd
, &dcb
))
9523 error ("SetCommState() failed");
9525 childp2
= Fplist_put (childp2
, QCsummary
, build_string (summary
));
9526 pset_childp (p
, childp2
);
9529 /* For make-pipe-process */
9531 register_aux_fd (int infd
)
9537 error ("Could not create child process");
9539 cp
->status
= STATUS_READ_ACKNOWLEDGED
;
9541 if (fd_info
[ infd
].cp
!= NULL
)
9543 error ("fd_info[fd = %d] is already in use", infd
);
9545 fd_info
[ infd
].cp
= cp
;
9546 fd_info
[ infd
].hnd
= (HANDLE
) _get_osfhandle (infd
);
9552 emacs_gnutls_pull (gnutls_transport_ptr_t p
, void* buf
, size_t sz
)
9555 struct Lisp_Process
*process
= (struct Lisp_Process
*)p
;
9556 int fd
= process
->infd
;
9558 n
= sys_read (fd
, (char*)buf
, sz
);
9565 /* Translate the WSAEWOULDBLOCK alias EWOULDBLOCK to EAGAIN. */
9566 if (err
== EWOULDBLOCK
)
9569 emacs_gnutls_transport_set_errno (process
->gnutls_state
, err
);
9575 emacs_gnutls_push (gnutls_transport_ptr_t p
, const void* buf
, size_t sz
)
9577 struct Lisp_Process
*process
= (struct Lisp_Process
*)p
;
9578 int fd
= process
->outfd
;
9579 ssize_t n
= sys_write (fd
, buf
, sz
);
9581 /* 0 or more bytes written means everything went fine. */
9585 /* Negative bytes written means we got an error in errno.
9586 Translate the WSAEWOULDBLOCK alias EWOULDBLOCK to EAGAIN. */
9587 emacs_gnutls_transport_set_errno (process
->gnutls_state
,
9588 errno
== EWOULDBLOCK
? EAGAIN
: errno
);
9592 #endif /* HAVE_GNUTLS */