1 /* Process support for GNU Emacs on the Microsoft W32 API.
2 Copyright (C) 1992, 1995 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA.
21 Drew Bliss Oct 14, 1993
22 Adapted from alarm.c by Tim Fleehart
32 /* must include CRT headers *before* config.h */
50 /* Control whether spawnve quotes arguments as necessary to ensure
51 correct parsing by child process. Because not all uses of spawnve
52 are careful about constructing argv arrays, we make this behaviour
53 conditional (off by default). */
54 Lisp_Object Vw32_quote_process_args
;
56 /* Control whether create_child causes the process' window to be
57 hidden. The default is nil. */
58 Lisp_Object Vw32_start_process_show_window
;
60 /* Control whether create_child causes the process to inherit Emacs'
61 console window, or be given a new one of its own. The default is
62 nil, to allow multiple DOS programs to run on Win95. Having separate
63 consoles also allows Emacs to cleanly terminate process groups. */
64 Lisp_Object Vw32_start_process_share_console
;
66 /* Time to sleep before reading from a subprocess output pipe - this
67 avoids the inefficiency of frequently reading small amounts of data.
68 This is primarily necessary for handling DOS processes on Windows 95,
69 but is useful for W32 processes on both Windows 95 and NT as well. */
70 Lisp_Object Vw32_pipe_read_delay
;
72 /* Control conversion of upper case file names to lower case.
73 nil means no, t means yes. */
74 Lisp_Object Vw32_downcase_file_names
;
76 /* Control whether stat() attempts to generate fake but hopefully
77 "accurate" inode values, by hashing the absolute truenames of files.
78 This should detect aliasing between long and short names, but still
79 allows the possibility of hash collisions. */
80 Lisp_Object Vw32_generate_fake_inodes
;
82 /* Control whether stat() attempts to determine file type and link count
83 exactly, at the expense of slower operation. Since true hard links
84 are supported on NTFS volumes, this is only relevant on NT. */
85 Lisp_Object Vw32_get_true_file_attributes
;
87 Lisp_Object Qhigh
, Qlow
;
89 #ifndef SYS_SIGLIST_DECLARED
90 extern char *sys_siglist
[];
94 void _DebPrint (const char *fmt
, ...)
100 vsprintf (buf
, fmt
, args
);
102 OutputDebugString (buf
);
106 typedef void (_CALLBACK_
*signal_handler
)(int);
108 /* Signal handlers...SIG_DFL == 0 so this is initialized correctly. */
109 static signal_handler sig_handlers
[NSIG
];
111 /* Fake signal implementation to record the SIGCHLD handler. */
113 sys_signal (int sig
, signal_handler handler
)
122 old
= sig_handlers
[sig
];
123 sig_handlers
[sig
] = handler
;
127 /* Defined in <process.h> which conflicts with the local copy */
130 /* Child process management list. */
131 int child_proc_count
= 0;
132 child_process child_procs
[ MAX_CHILDREN
];
133 child_process
*dead_child
= NULL
;
135 DWORD WINAPI
reader_thread (void *arg
);
137 /* Find an unused process slot. */
144 for (cp
= child_procs
+(child_proc_count
-1); cp
>= child_procs
; cp
--)
145 if (!CHILD_ACTIVE (cp
))
147 if (child_proc_count
== MAX_CHILDREN
)
149 cp
= &child_procs
[child_proc_count
++];
152 memset (cp
, 0, sizeof(*cp
));
155 cp
->procinfo
.hProcess
= NULL
;
156 cp
->status
= STATUS_READ_ERROR
;
158 /* use manual reset event so that select() will function properly */
159 cp
->char_avail
= CreateEvent (NULL
, TRUE
, FALSE
, NULL
);
162 cp
->char_consumed
= CreateEvent (NULL
, FALSE
, FALSE
, NULL
);
163 if (cp
->char_consumed
)
165 cp
->thrd
= CreateThread (NULL
, 1024, reader_thread
, cp
, 0, &id
);
175 delete_child (child_process
*cp
)
179 /* Should not be deleting a child that is still needed. */
180 for (i
= 0; i
< MAXDESC
; i
++)
181 if (fd_info
[i
].cp
== cp
)
184 if (!CHILD_ACTIVE (cp
))
187 /* reap thread if necessary */
192 if (GetExitCodeThread (cp
->thrd
, &rc
) && rc
== STILL_ACTIVE
)
194 /* let the thread exit cleanly if possible */
195 cp
->status
= STATUS_READ_ERROR
;
196 SetEvent (cp
->char_consumed
);
197 if (WaitForSingleObject (cp
->thrd
, 1000) != WAIT_OBJECT_0
)
199 DebPrint (("delete_child.WaitForSingleObject (thread) failed "
200 "with %lu for fd %ld\n", GetLastError (), cp
->fd
));
201 TerminateThread (cp
->thrd
, 0);
204 CloseHandle (cp
->thrd
);
209 CloseHandle (cp
->char_avail
);
210 cp
->char_avail
= NULL
;
212 if (cp
->char_consumed
)
214 CloseHandle (cp
->char_consumed
);
215 cp
->char_consumed
= NULL
;
218 /* update child_proc_count (highest numbered slot in use plus one) */
219 if (cp
== child_procs
+ child_proc_count
- 1)
221 for (i
= child_proc_count
-1; i
>= 0; i
--)
222 if (CHILD_ACTIVE (&child_procs
[i
]))
224 child_proc_count
= i
+ 1;
229 child_proc_count
= 0;
232 /* Find a child by pid. */
233 static child_process
*
234 find_child_pid (DWORD pid
)
238 for (cp
= child_procs
+(child_proc_count
-1); cp
>= child_procs
; cp
--)
239 if (CHILD_ACTIVE (cp
) && pid
== cp
->pid
)
245 /* Thread proc for child process and socket reader threads. Each thread
246 is normally blocked until woken by select() to check for input by
247 reading one char. When the read completes, char_avail is signalled
248 to wake up the select emulator and the thread blocks itself again. */
250 reader_thread (void *arg
)
255 cp
= (child_process
*)arg
;
257 /* We have to wait for the go-ahead before we can start */
259 || WaitForSingleObject (cp
->char_consumed
, INFINITE
) != WAIT_OBJECT_0
)
266 rc
= _sys_read_ahead (cp
->fd
);
268 /* The name char_avail is a misnomer - it really just means the
269 read-ahead has completed, whether successfully or not. */
270 if (!SetEvent (cp
->char_avail
))
272 DebPrint (("reader_thread.SetEvent failed with %lu for fd %ld\n",
273 GetLastError (), cp
->fd
));
277 if (rc
== STATUS_READ_ERROR
)
280 /* If the read died, the child has died so let the thread die */
281 if (rc
== STATUS_READ_FAILED
)
284 /* Wait until our input is acknowledged before reading again */
285 if (WaitForSingleObject (cp
->char_consumed
, INFINITE
) != WAIT_OBJECT_0
)
287 DebPrint (("reader_thread.WaitForSingleObject failed with "
288 "%lu for fd %ld\n", GetLastError (), cp
->fd
));
295 /* To avoid Emacs changing directory, we just record here the directory
296 the new process should start in. This is set just before calling
297 sys_spawnve, and is not generally valid at any other time. */
298 static char * process_dir
;
301 create_child (char *exe
, char *cmdline
, char *env
,
302 int * pPid
, child_process
*cp
)
305 SECURITY_ATTRIBUTES sec_attrs
;
306 SECURITY_DESCRIPTOR sec_desc
;
307 char dir
[ MAXPATHLEN
];
309 if (cp
== NULL
) abort ();
311 memset (&start
, 0, sizeof (start
));
312 start
.cb
= sizeof (start
);
315 if (NILP (Vw32_start_process_show_window
))
316 start
.dwFlags
= STARTF_USESTDHANDLES
| STARTF_USESHOWWINDOW
;
318 start
.dwFlags
= STARTF_USESTDHANDLES
;
319 start
.wShowWindow
= SW_HIDE
;
321 start
.hStdInput
= GetStdHandle (STD_INPUT_HANDLE
);
322 start
.hStdOutput
= GetStdHandle (STD_OUTPUT_HANDLE
);
323 start
.hStdError
= GetStdHandle (STD_ERROR_HANDLE
);
324 #endif /* HAVE_NTGUI */
326 /* Explicitly specify no security */
327 if (!InitializeSecurityDescriptor (&sec_desc
, SECURITY_DESCRIPTOR_REVISION
))
329 if (!SetSecurityDescriptorDacl (&sec_desc
, TRUE
, NULL
, FALSE
))
331 sec_attrs
.nLength
= sizeof (sec_attrs
);
332 sec_attrs
.lpSecurityDescriptor
= &sec_desc
;
333 sec_attrs
.bInheritHandle
= FALSE
;
335 strcpy (dir
, process_dir
);
336 unixtodos_filename (dir
);
338 if (!CreateProcess (exe
, cmdline
, &sec_attrs
, NULL
, TRUE
,
339 (!NILP (Vw32_start_process_share_console
)
340 ? CREATE_NEW_PROCESS_GROUP
341 : CREATE_NEW_CONSOLE
),
343 &start
, &cp
->procinfo
))
346 cp
->pid
= (int) cp
->procinfo
.dwProcessId
;
348 /* Hack for Windows 95, which assigns large (ie negative) pids */
352 /* pid must fit in a Lisp_Int */
353 cp
->pid
= (cp
->pid
& VALMASK
);
360 DebPrint (("create_child.CreateProcess failed: %ld\n", GetLastError()););
364 /* create_child doesn't know what emacs' file handle will be for waiting
365 on output from the child, so we need to make this additional call
366 to register the handle with the process
367 This way the select emulator knows how to match file handles with
368 entries in child_procs. */
370 register_child (int pid
, int fd
)
374 cp
= find_child_pid (pid
);
377 DebPrint (("register_child unable to find pid %lu\n", pid
));
382 DebPrint (("register_child registered fd %d with pid %lu\n", fd
, pid
));
387 /* thread is initially blocked until select is called; set status so
388 that select will release thread */
389 cp
->status
= STATUS_READ_ACKNOWLEDGED
;
391 /* attach child_process to fd_info */
392 if (fd_info
[fd
].cp
!= NULL
)
394 DebPrint (("register_child: fd_info[%d] apparently in use!\n", fd
));
401 /* When a process dies its pipe will break so the reader thread will
402 signal failure to the select emulator.
403 The select emulator then calls this routine to clean up.
404 Since the thread signaled failure we can assume it is exiting. */
406 reap_subprocess (child_process
*cp
)
408 if (cp
->procinfo
.hProcess
)
410 /* Reap the process */
412 /* Process should have already died before we are called. */
413 if (WaitForSingleObject (cp
->procinfo
.hProcess
, 0) != WAIT_OBJECT_0
)
414 DebPrint (("reap_subprocess: child fpr fd %d has not died yet!", cp
->fd
));
416 CloseHandle (cp
->procinfo
.hProcess
);
417 cp
->procinfo
.hProcess
= NULL
;
418 CloseHandle (cp
->procinfo
.hThread
);
419 cp
->procinfo
.hThread
= NULL
;
422 /* For asynchronous children, the child_proc resources will be freed
423 when the last pipe read descriptor is closed; for synchronous
424 children, we must explicitly free the resources now because
425 register_child has not been called. */
430 /* Wait for any of our existing child processes to die
431 When it does, close its handle
432 Return the pid and fill in the status if non-NULL. */
435 sys_wait (int *status
)
437 DWORD active
, retval
;
440 child_process
*cp
, *cps
[MAX_CHILDREN
];
441 HANDLE wait_hnd
[MAX_CHILDREN
];
444 if (dead_child
!= NULL
)
446 /* We want to wait for a specific child */
447 wait_hnd
[nh
] = dead_child
->procinfo
.hProcess
;
448 cps
[nh
] = dead_child
;
449 if (!wait_hnd
[nh
]) abort ();
456 for (cp
= child_procs
+(child_proc_count
-1); cp
>= child_procs
; cp
--)
457 /* some child_procs might be sockets; ignore them */
458 if (CHILD_ACTIVE (cp
) && cp
->procinfo
.hProcess
)
460 wait_hnd
[nh
] = cp
->procinfo
.hProcess
;
468 /* Nothing to wait on, so fail */
475 /* Check for quit about once a second. */
477 active
= WaitForMultipleObjects (nh
, wait_hnd
, FALSE
, 1000);
478 } while (active
== WAIT_TIMEOUT
);
480 if (active
== WAIT_FAILED
)
485 else if (active
>= WAIT_OBJECT_0
486 && active
< WAIT_OBJECT_0
+MAXIMUM_WAIT_OBJECTS
)
488 active
-= WAIT_OBJECT_0
;
490 else if (active
>= WAIT_ABANDONED_0
491 && active
< WAIT_ABANDONED_0
+MAXIMUM_WAIT_OBJECTS
)
493 active
-= WAIT_ABANDONED_0
;
499 if (!GetExitCodeProcess (wait_hnd
[active
], &retval
))
501 DebPrint (("Wait.GetExitCodeProcess failed with %lu\n",
505 if (retval
== STILL_ACTIVE
)
507 /* Should never happen */
508 DebPrint (("Wait.WaitForMultipleObjects returned an active process\n"));
513 /* Massage the exit code from the process to match the format expected
514 by the WIFSTOPPED et al macros in syswait.h. Only WIFSIGNALED and
515 WIFEXITED are supported; WIFSTOPPED doesn't make sense under NT. */
517 if (retval
== STATUS_CONTROL_C_EXIT
)
525 DebPrint (("Wait signaled with process pid %d\n", cp
->pid
));
532 else if (synch_process_alive
)
534 synch_process_alive
= 0;
536 /* Report the status of the synchronous process. */
537 if (WIFEXITED (retval
))
538 synch_process_retcode
= WRETCODE (retval
);
539 else if (WIFSIGNALED (retval
))
541 int code
= WTERMSIG (retval
);
546 /* Suppress warning if the table has const char *. */
547 signame
= (char *) sys_siglist
[code
];
552 synch_process_death
= signame
;
555 reap_subprocess (cp
);
558 reap_subprocess (cp
);
564 w32_executable_type (char * filename
, int * is_dos_app
, int * is_cygnus_app
)
566 file_data executable
;
569 /* Default values in case we can't tell for sure. */
571 *is_cygnus_app
= FALSE
;
573 if (!open_input_file (&executable
, filename
))
576 p
= strrchr (filename
, '.');
578 /* We can only identify DOS .com programs from the extension. */
579 if (p
&& stricmp (p
, ".com") == 0)
581 else if (p
&& (stricmp (p
, ".bat") == 0
582 || stricmp (p
, ".cmd") == 0))
584 /* A DOS shell script - it appears that CreateProcess is happy to
585 accept this (somewhat surprisingly); presumably it looks at
586 COMSPEC to determine what executable to actually invoke.
587 Therefore, we have to do the same here as well. */
588 /* Actually, I think it uses the program association for that
589 extension, which is defined in the registry. */
590 p
= egetenv ("COMSPEC");
592 w32_executable_type (p
, is_dos_app
, is_cygnus_app
);
596 /* Look for DOS .exe signature - if found, we must also check that
597 it isn't really a 16- or 32-bit Windows exe, since both formats
598 start with a DOS program stub. Note that 16-bit Windows
599 executables use the OS/2 1.x format. */
601 IMAGE_DOS_HEADER
* dos_header
;
602 IMAGE_NT_HEADERS
* nt_header
;
604 dos_header
= (PIMAGE_DOS_HEADER
) executable
.file_base
;
605 if (dos_header
->e_magic
!= IMAGE_DOS_SIGNATURE
)
608 nt_header
= (PIMAGE_NT_HEADERS
) ((char *) dos_header
+ dos_header
->e_lfanew
);
610 if ((char *) nt_header
> (char *) dos_header
+ executable
.size
)
612 /* Some dos headers (pkunzip) have bogus e_lfanew fields. */
615 else if (nt_header
->Signature
!= IMAGE_NT_SIGNATURE
616 && LOWORD (nt_header
->Signature
) != IMAGE_OS2_SIGNATURE
)
620 else if (nt_header
->Signature
== IMAGE_NT_SIGNATURE
)
622 /* Look for cygwin.dll in DLL import list. */
623 IMAGE_DATA_DIRECTORY import_dir
=
624 nt_header
->OptionalHeader
.DataDirectory
[IMAGE_DIRECTORY_ENTRY_IMPORT
];
625 IMAGE_IMPORT_DESCRIPTOR
* imports
;
626 IMAGE_SECTION_HEADER
* section
;
628 section
= rva_to_section (import_dir
.VirtualAddress
, nt_header
);
629 imports
= RVA_TO_PTR (import_dir
.VirtualAddress
, section
, executable
);
631 for ( ; imports
->Name
; imports
++)
633 char * dllname
= RVA_TO_PTR (imports
->Name
, section
, executable
);
635 if (strcmp (dllname
, "cygwin.dll") == 0)
637 *is_cygnus_app
= TRUE
;
645 close_file_data (&executable
);
649 compare_env (const char **strp1
, const char **strp2
)
651 const char *str1
= *strp1
, *str2
= *strp2
;
653 while (*str1
&& *str2
&& *str1
!= '=' && *str2
!= '=')
655 if (tolower (*str1
) > tolower (*str2
))
657 else if (tolower (*str1
) < tolower (*str2
))
662 if (*str1
== '=' && *str2
== '=')
664 else if (*str1
== '=')
671 merge_and_sort_env (char **envp1
, char **envp2
, char **new_envp
)
687 qsort (new_envp
, num
, sizeof (char *), compare_env
);
692 /* When a new child process is created we need to register it in our list,
693 so intercept spawn requests. */
695 sys_spawnve (int mode
, char *cmdname
, char **argv
, char **envp
)
697 Lisp_Object program
, full
;
698 char *cmdline
, *env
, *parg
, **targ
;
702 int is_dos_app
, is_cygnus_app
;
705 /* We pass our process ID to our children by setting up an environment
706 variable in their environment. */
707 char ppid_env_var_buffer
[64];
708 char *extra_env
[] = {ppid_env_var_buffer
, NULL
};
710 /* We don't care about the other modes */
711 if (mode
!= _P_NOWAIT
)
717 /* Handle executable names without an executable suffix. */
718 program
= make_string (cmdname
, strlen (cmdname
));
719 if (NILP (Ffile_executable_p (program
)))
725 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &full
, 1);
735 /* make sure argv[0] and cmdname are both in DOS format */
736 cmdname
= XSTRING (program
)->data
;
737 unixtodos_filename (cmdname
);
740 /* Determine whether program is a 16-bit DOS executable, or a w32
741 executable that is implicitly linked to the Cygnus dll (implying it
742 was compiled with the Cygnus GNU toolchain and hence relies on
743 cygwin.dll to parse the command line - we use this to decide how to
744 escape quote chars in command line args that must be quoted). */
745 w32_executable_type (cmdname
, &is_dos_app
, &is_cygnus_app
);
747 /* On Windows 95, if cmdname is a DOS app, we invoke a helper
748 application to start it by specifying the helper app as cmdname,
749 while leaving the real app name as argv[0]. */
752 cmdname
= alloca (MAXPATHLEN
);
753 if (egetenv ("CMDPROXY"))
754 strcpy (cmdname
, egetenv ("CMDPROXY"));
757 strcpy (cmdname
, XSTRING (Vinvocation_directory
)->data
);
758 strcat (cmdname
, "cmdproxy.exe");
760 unixtodos_filename (cmdname
);
763 /* we have to do some conjuring here to put argv and envp into the
764 form CreateProcess wants... argv needs to be a space separated/null
765 terminated list of parameters, and envp is a null
766 separated/double-null terminated list of parameters.
768 Additionally, zero-length args and args containing whitespace or
769 quote chars need to be wrapped in double quotes - for this to work,
770 embedded quotes need to be escaped as well. The aim is to ensure
771 the child process reconstructs the argv array we start with
772 exactly, so we treat quotes at the beginning and end of arguments
775 The w32 GNU-based library from Cygnus doubles quotes to escape
776 them, while MSVC uses backslash for escaping. (Actually the MSVC
777 startup code does attempt to recognise doubled quotes and accept
778 them, but gets it wrong and ends up requiring three quotes to get a
779 single embedded quote!) So by default we decide whether to use
780 quote or backslash as the escape character based on whether the
781 binary is apparently a Cygnus compiled app.
783 Note that using backslash to escape embedded quotes requires
784 additional special handling if an embedded quote is already
785 preceeded by backslash, or if an arg requiring quoting ends with
786 backslash. In such cases, the run of escape characters needs to be
787 doubled. For consistency, we apply this special handling as long
788 as the escape character is not quote.
790 Since we have no idea how large argv and envp are likely to be we
791 figure out list lengths on the fly and allocate them. */
793 if (!NILP (Vw32_quote_process_args
))
796 /* Override escape char by binding w32-quote-process-args to
797 desired character, or use t for auto-selection. */
798 if (INTEGERP (Vw32_quote_process_args
))
799 escape_char
= XINT (Vw32_quote_process_args
);
801 escape_char
= is_cygnus_app
? '"' : '\\';
811 int escape_char_run
= 0;
819 /* allow for embedded quotes to be escaped */
822 /* handle the case where the embedded quote is already escaped */
823 if (escape_char_run
> 0)
825 /* To preserve the arg exactly, we need to double the
826 preceding escape characters (plus adding one to
827 escape the quote character itself). */
828 arglen
+= escape_char_run
;
831 else if (*p
== ' ' || *p
== '\t')
836 if (*p
== escape_char
&& escape_char
!= '"')
844 /* handle the case where the arg ends with an escape char - we
845 must not let the enclosing quote be escaped. */
846 if (escape_char_run
> 0)
847 arglen
+= escape_char_run
;
849 arglen
+= strlen (*targ
++) + 1;
851 cmdline
= alloca (arglen
);
865 if (*p
== ' ' || *p
== '\t' || *p
== '"')
870 int escape_char_run
= 0;
876 last
= p
+ strlen (p
) - 1;
879 /* This version does not escape quotes if they occur at the
880 beginning or end of the arg - this could lead to incorrect
881 behaviour when the arg itself represents a command line
882 containing quoted args. I believe this was originally done
883 as a hack to make some things work, before
884 `w32-quote-process-args' was added. */
887 if (*p
== '"' && p
> first
&& p
< last
)
888 *parg
++ = escape_char
; /* escape embedded quotes */
896 /* double preceding escape chars if any */
897 while (escape_char_run
> 0)
899 *parg
++ = escape_char
;
902 /* escape all quote chars, even at beginning or end */
903 *parg
++ = escape_char
;
907 if (*p
== escape_char
&& escape_char
!= '"')
912 /* double escape chars before enclosing quote */
913 while (escape_char_run
> 0)
915 *parg
++ = escape_char
;
923 strcpy (parg
, *targ
);
924 parg
+= strlen (*targ
);
934 numenv
= 1; /* for end null */
937 arglen
+= strlen (*targ
++) + 1;
940 /* extra env vars... */
941 sprintf (ppid_env_var_buffer
, "__PARENT_PROCESS_ID=%d",
942 GetCurrentProcessId ());
943 arglen
+= strlen (ppid_env_var_buffer
) + 1;
946 /* merge env passed in and extra env into one, and sort it. */
947 targ
= (char **) alloca (numenv
* sizeof (char *));
948 merge_and_sort_env (envp
, extra_env
, targ
);
950 /* concatenate env entries. */
951 env
= alloca (arglen
);
955 strcpy (parg
, *targ
);
956 parg
+= strlen (*targ
++);
969 /* Now create the process. */
970 if (!create_child (cmdname
, cmdline
, env
, &pid
, cp
))
980 /* Emulate the select call
981 Wait for available input on any of the given rfds, or timeout if
982 a timeout is given and no input is detected
983 wfds and efds are not supported and must be NULL.
985 For simplicity, we detect the death of child processes here and
986 synchronously call the SIGCHLD handler. Since it is possible for
987 children to be created without a corresponding pipe handle from which
988 to read output, we wait separately on the process handles as well as
989 the char_avail events for each process pipe. We only call
990 wait/reap_process when the process actually terminates. */
993 extern HANDLE keyboard_handle
;
995 extern int proc_buffered_char
[];
998 sys_select (int nfds
, SELECT_TYPE
*rfds
, SELECT_TYPE
*wfds
, SELECT_TYPE
*efds
,
1002 DWORD timeout_ms
, start_time
;
1005 child_process
*cp
, *cps
[MAX_CHILDREN
];
1006 HANDLE wait_hnd
[MAXDESC
+ MAX_CHILDREN
];
1007 int fdindex
[MAXDESC
]; /* mapping from wait handles back to descriptors */
1009 timeout_ms
= timeout
? (timeout
->tv_sec
* 1000 + timeout
->tv_usec
/ 1000) : INFINITE
;
1011 /* If the descriptor sets are NULL but timeout isn't, then just Sleep. */
1012 if (rfds
== NULL
&& wfds
== NULL
&& efds
== NULL
&& timeout
!= NULL
)
1018 /* Otherwise, we only handle rfds, so fail otherwise. */
1019 if (rfds
== NULL
|| wfds
!= NULL
|| efds
!= NULL
)
1029 /* Build a list of pipe handles to wait on. */
1031 for (i
= 0; i
< nfds
; i
++)
1032 if (FD_ISSET (i
, &orfds
))
1036 if (keyboard_handle
)
1038 /* Handle stdin specially */
1039 wait_hnd
[nh
] = keyboard_handle
;
1044 /* Check for any emacs-generated input in the queue since
1045 it won't be detected in the wait */
1046 if (detect_input_pending ())
1054 /* Child process and socket input */
1058 int current_status
= cp
->status
;
1060 if (current_status
== STATUS_READ_ACKNOWLEDGED
)
1062 /* Tell reader thread which file handle to use. */
1064 /* Wake up the reader thread for this process */
1065 cp
->status
= STATUS_READ_READY
;
1066 if (!SetEvent (cp
->char_consumed
))
1067 DebPrint (("nt_select.SetEvent failed with "
1068 "%lu for fd %ld\n", GetLastError (), i
));
1071 #ifdef CHECK_INTERLOCK
1072 /* slightly crude cross-checking of interlock between threads */
1074 current_status
= cp
->status
;
1075 if (WaitForSingleObject (cp
->char_avail
, 0) == WAIT_OBJECT_0
)
1077 /* char_avail has been signalled, so status (which may
1078 have changed) should indicate read has completed
1079 but has not been acknowledged. */
1080 current_status
= cp
->status
;
1081 if (current_status
!= STATUS_READ_SUCCEEDED
1082 && current_status
!= STATUS_READ_FAILED
)
1083 DebPrint (("char_avail set, but read not completed: status %d\n",
1088 /* char_avail has not been signalled, so status should
1089 indicate that read is in progress; small possibility
1090 that read has completed but event wasn't yet signalled
1091 when we tested it (because a context switch occurred
1092 or if running on separate CPUs). */
1093 if (current_status
!= STATUS_READ_READY
1094 && current_status
!= STATUS_READ_IN_PROGRESS
1095 && current_status
!= STATUS_READ_SUCCEEDED
1096 && current_status
!= STATUS_READ_FAILED
)
1097 DebPrint (("char_avail reset, but read status is bad: %d\n",
1101 wait_hnd
[nh
] = cp
->char_avail
;
1103 if (!wait_hnd
[nh
]) abort ();
1106 DebPrint (("select waiting on child %d fd %d\n",
1107 cp
-child_procs
, i
));
1112 /* Unable to find something to wait on for this fd, skip */
1114 /* Note that this is not a fatal error, and can in fact
1115 happen in unusual circumstances. Specifically, if
1116 sys_spawnve fails, eg. because the program doesn't
1117 exist, and debug-on-error is t so Fsignal invokes a
1118 nested input loop, then the process output pipe is
1119 still included in input_wait_mask with no child_proc
1120 associated with it. (It is removed when the debugger
1121 exits the nested input loop and the error is thrown.) */
1123 DebPrint (("sys_select: fd %ld is invalid! ignoring\n", i
));
1129 /* Add handles of child processes. */
1131 for (cp
= child_procs
+(child_proc_count
-1); cp
>= child_procs
; cp
--)
1132 /* Some child_procs might be sockets; ignore them. Also some
1133 children may have died already, but we haven't finished reading
1134 the process output; ignore them too. */
1135 if (CHILD_ACTIVE (cp
) && cp
->procinfo
.hProcess
1137 || (fd_info
[cp
->fd
].flags
& FILE_SEND_SIGCHLD
) == 0
1138 || (fd_info
[cp
->fd
].flags
& FILE_AT_EOF
) != 0)
1141 wait_hnd
[nh
+ nc
] = cp
->procinfo
.hProcess
;
1146 /* Nothing to look for, so we didn't find anything */
1154 /* Wait for input or child death to be signalled. */
1155 start_time
= GetTickCount ();
1156 active
= WaitForMultipleObjects (nh
+ nc
, wait_hnd
, FALSE
, timeout_ms
);
1158 if (active
== WAIT_FAILED
)
1160 DebPrint (("select.WaitForMultipleObjects (%d, %lu) failed with %lu\n",
1161 nh
+ nc
, timeout_ms
, GetLastError ()));
1162 /* don't return EBADF - this causes wait_reading_process_input to
1163 abort; WAIT_FAILED is returned when single-stepping under
1164 Windows 95 after switching thread focus in debugger, and
1165 possibly at other times. */
1169 else if (active
== WAIT_TIMEOUT
)
1173 else if (active
>= WAIT_OBJECT_0
1174 && active
< WAIT_OBJECT_0
+MAXIMUM_WAIT_OBJECTS
)
1176 active
-= WAIT_OBJECT_0
;
1178 else if (active
>= WAIT_ABANDONED_0
1179 && active
< WAIT_ABANDONED_0
+MAXIMUM_WAIT_OBJECTS
)
1181 active
-= WAIT_ABANDONED_0
;
1186 /* Loop over all handles after active (now officially documented as
1187 being the first signalled handle in the array). We do this to
1188 ensure fairness, so that all channels with data available will be
1189 processed - otherwise higher numbered channels could be starved. */
1194 cp
= cps
[active
- nh
];
1196 /* We cannot always signal SIGCHLD immediately; if we have not
1197 finished reading the process output, we must delay sending
1198 SIGCHLD until we do. */
1200 if (cp
->fd
>= 0 && (fd_info
[cp
->fd
].flags
& FILE_AT_EOF
) == 0)
1201 fd_info
[cp
->fd
].flags
|= FILE_SEND_SIGCHLD
;
1202 /* SIG_DFL for SIGCHLD is ignore */
1203 else if (sig_handlers
[SIGCHLD
] != SIG_DFL
&&
1204 sig_handlers
[SIGCHLD
] != SIG_IGN
)
1207 DebPrint (("select calling SIGCHLD handler for pid %d\n",
1211 sig_handlers
[SIGCHLD
] (SIGCHLD
);
1215 else if (fdindex
[active
] == 0)
1217 /* Keyboard input available */
1223 /* must be a socket or pipe - read ahead should have
1224 completed, either succeeding or failing. */
1225 FD_SET (fdindex
[active
], rfds
);
1229 /* Even though wait_reading_process_output only reads from at most
1230 one channel, we must process all channels here so that we reap
1231 all children that have died. */
1232 while (++active
< nh
+ nc
)
1233 if (WaitForSingleObject (wait_hnd
[active
], 0) == WAIT_OBJECT_0
)
1235 } while (active
< nh
+ nc
);
1237 /* If no input has arrived and timeout hasn't expired, wait again. */
1240 DWORD elapsed
= GetTickCount () - start_time
;
1242 if (timeout_ms
> elapsed
) /* INFINITE is MAX_UINT */
1244 if (timeout_ms
!= INFINITE
)
1245 timeout_ms
-= elapsed
;
1246 goto count_children
;
1253 /* Substitute for certain kill () operations */
1255 static BOOL CALLBACK
1256 find_child_console (HWND hwnd
, child_process
* cp
)
1261 thread_id
= GetWindowThreadProcessId (hwnd
, &process_id
);
1262 if (process_id
== cp
->procinfo
.dwProcessId
)
1264 char window_class
[32];
1266 GetClassName (hwnd
, window_class
, sizeof (window_class
));
1267 if (strcmp (window_class
,
1268 (os_subtype
== OS_WIN95
)
1270 : "ConsoleWindowClass") == 0)
1281 sys_kill (int pid
, int sig
)
1285 int need_to_free
= 0;
1288 /* Only handle signals that will result in the process dying */
1289 if (sig
!= SIGINT
&& sig
!= SIGKILL
&& sig
!= SIGQUIT
&& sig
!= SIGHUP
)
1295 cp
= find_child_pid (pid
);
1298 proc_hand
= OpenProcess (PROCESS_TERMINATE
, 0, pid
);
1299 if (proc_hand
== NULL
)
1308 proc_hand
= cp
->procinfo
.hProcess
;
1309 pid
= cp
->procinfo
.dwProcessId
;
1311 /* Try to locate console window for process. */
1312 EnumWindows (find_child_console
, (LPARAM
) cp
);
1317 if (NILP (Vw32_start_process_share_console
) && cp
&& cp
->hwnd
)
1319 BYTE control_scan_code
= (BYTE
) MapVirtualKey (VK_CONTROL
, 0);
1320 BYTE vk_break_code
= VK_CANCEL
;
1321 BYTE break_scan_code
= (BYTE
) MapVirtualKey (vk_break_code
, 0);
1322 HWND foreground_window
;
1324 if (break_scan_code
== 0)
1326 /* Fake Ctrl-C if we can't manage Ctrl-Break. */
1327 vk_break_code
= 'C';
1328 break_scan_code
= (BYTE
) MapVirtualKey (vk_break_code
, 0);
1331 foreground_window
= GetForegroundWindow ();
1332 if (foreground_window
&& SetForegroundWindow (cp
->hwnd
))
1334 /* Generate keystrokes as if user had typed Ctrl-Break or Ctrl-C. */
1335 keybd_event (VK_CONTROL
, control_scan_code
, 0, 0);
1336 keybd_event (vk_break_code
, break_scan_code
, 0, 0);
1337 keybd_event (vk_break_code
, break_scan_code
, KEYEVENTF_KEYUP
, 0);
1338 keybd_event (VK_CONTROL
, control_scan_code
, KEYEVENTF_KEYUP
, 0);
1340 /* Sleep for a bit to give time for Emacs frame to respond
1341 to focus change events (if Emacs was active app). */
1344 SetForegroundWindow (foreground_window
);
1347 /* Ctrl-Break is NT equivalent of SIGINT. */
1348 else if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT
, pid
))
1350 DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d "
1351 "for pid %lu\n", GetLastError (), pid
));
1358 if (NILP (Vw32_start_process_share_console
) && cp
&& cp
->hwnd
)
1361 if (os_subtype
== OS_WIN95
)
1364 Another possibility is to try terminating the VDM out-right by
1365 calling the Shell VxD (id 0x17) V86 interface, function #4
1366 "SHELL_Destroy_VM", ie.
1372 First need to determine the current VM handle, and then arrange for
1373 the shellapi call to be made from the system vm (by using
1374 Switch_VM_and_callback).
1376 Could try to invoke DestroyVM through CallVxD.
1380 /* On Win95, posting WM_QUIT causes the 16-bit subsystem
1381 to hang when cmdproxy is used in conjunction with
1382 command.com for an interactive shell. Posting
1383 WM_CLOSE pops up a dialog that, when Yes is selected,
1384 does the same thing. TerminateProcess is also less
1385 than ideal in that subprocesses tend to stick around
1386 until the machine is shutdown, but at least it
1387 doesn't freeze the 16-bit subsystem. */
1388 PostMessage (cp
->hwnd
, WM_QUIT
, 0xff, 0);
1390 if (!TerminateProcess (proc_hand
, 0xff))
1392 DebPrint (("sys_kill.TerminateProcess returned %d "
1393 "for pid %lu\n", GetLastError (), pid
));
1400 PostMessage (cp
->hwnd
, WM_CLOSE
, 0, 0);
1402 /* Kill the process. On W32 this doesn't kill child processes
1403 so it doesn't work very well for shells which is why it's not
1404 used in every case. */
1405 else if (!TerminateProcess (proc_hand
, 0xff))
1407 DebPrint (("sys_kill.TerminateProcess returned %d "
1408 "for pid %lu\n", GetLastError (), pid
));
1415 CloseHandle (proc_hand
);
1420 /* extern int report_file_error (char *, Lisp_Object); */
1422 /* The following two routines are used to manipulate stdin, stdout, and
1423 stderr of our child processes.
1425 Assuming that in, out, and err are *not* inheritable, we make them
1426 stdin, stdout, and stderr of the child as follows:
1428 - Save the parent's current standard handles.
1429 - Set the std handles to inheritable duplicates of the ones being passed in.
1430 (Note that _get_osfhandle() is an io.h procedure that retrieves the
1431 NT file handle for a crt file descriptor.)
1432 - Spawn the child, which inherits in, out, and err as stdin,
1433 stdout, and stderr. (see Spawnve)
1434 - Close the std handles passed to the child.
1435 - Reset the parent's standard handles to the saved handles.
1436 (see reset_standard_handles)
1437 We assume that the caller closes in, out, and err after calling us. */
1440 prepare_standard_handles (int in
, int out
, int err
, HANDLE handles
[3])
1443 HANDLE newstdin
, newstdout
, newstderr
;
1445 parent
= GetCurrentProcess ();
1447 handles
[0] = GetStdHandle (STD_INPUT_HANDLE
);
1448 handles
[1] = GetStdHandle (STD_OUTPUT_HANDLE
);
1449 handles
[2] = GetStdHandle (STD_ERROR_HANDLE
);
1451 /* make inheritable copies of the new handles */
1452 if (!DuplicateHandle (parent
,
1453 (HANDLE
) _get_osfhandle (in
),
1458 DUPLICATE_SAME_ACCESS
))
1459 report_file_error ("Duplicating input handle for child", Qnil
);
1461 if (!DuplicateHandle (parent
,
1462 (HANDLE
) _get_osfhandle (out
),
1467 DUPLICATE_SAME_ACCESS
))
1468 report_file_error ("Duplicating output handle for child", Qnil
);
1470 if (!DuplicateHandle (parent
,
1471 (HANDLE
) _get_osfhandle (err
),
1476 DUPLICATE_SAME_ACCESS
))
1477 report_file_error ("Duplicating error handle for child", Qnil
);
1479 /* and store them as our std handles */
1480 if (!SetStdHandle (STD_INPUT_HANDLE
, newstdin
))
1481 report_file_error ("Changing stdin handle", Qnil
);
1483 if (!SetStdHandle (STD_OUTPUT_HANDLE
, newstdout
))
1484 report_file_error ("Changing stdout handle", Qnil
);
1486 if (!SetStdHandle (STD_ERROR_HANDLE
, newstderr
))
1487 report_file_error ("Changing stderr handle", Qnil
);
1491 reset_standard_handles (int in
, int out
, int err
, HANDLE handles
[3])
1493 /* close the duplicated handles passed to the child */
1494 CloseHandle (GetStdHandle (STD_INPUT_HANDLE
));
1495 CloseHandle (GetStdHandle (STD_OUTPUT_HANDLE
));
1496 CloseHandle (GetStdHandle (STD_ERROR_HANDLE
));
1498 /* now restore parent's saved std handles */
1499 SetStdHandle (STD_INPUT_HANDLE
, handles
[0]);
1500 SetStdHandle (STD_OUTPUT_HANDLE
, handles
[1]);
1501 SetStdHandle (STD_ERROR_HANDLE
, handles
[2]);
1505 set_process_dir (char * dir
)
1512 /* To avoid problems with winsock implementations that work over dial-up
1513 connections causing or requiring a connection to exist while Emacs is
1514 running, Emacs no longer automatically loads winsock on startup if it
1515 is present. Instead, it will be loaded when open-network-stream is
1518 To allow full control over when winsock is loaded, we provide these
1519 two functions to dynamically load and unload winsock. This allows
1520 dial-up users to only be connected when they actually need to use
1524 extern HANDLE winsock_lib
;
1525 extern BOOL
term_winsock (void);
1526 extern BOOL
init_winsock (int load_now
);
1528 extern Lisp_Object Vsystem_name
;
1530 DEFUN ("w32-has-winsock", Fw32_has_winsock
, Sw32_has_winsock
, 0, 1, 0,
1531 "Test for presence of the Windows socket library `winsock'.\n\
1532 Returns non-nil if winsock support is present, nil otherwise.\n\
1534 If the optional argument LOAD-NOW is non-nil, the winsock library is\n\
1535 also loaded immediately if not already loaded. If winsock is loaded,\n\
1536 the winsock local hostname is returned (since this may be different from\n\
1537 the value of `system-name' and should supplant it), otherwise t is\n\
1538 returned to indicate winsock support is present.")
1540 Lisp_Object load_now
;
1544 have_winsock
= init_winsock (!NILP (load_now
));
1547 if (winsock_lib
!= NULL
)
1549 /* Return new value for system-name. The best way to do this
1550 is to call init_system_name, saving and restoring the
1551 original value to avoid side-effects. */
1552 Lisp_Object orig_hostname
= Vsystem_name
;
1553 Lisp_Object hostname
;
1555 init_system_name ();
1556 hostname
= Vsystem_name
;
1557 Vsystem_name
= orig_hostname
;
1565 DEFUN ("w32-unload-winsock", Fw32_unload_winsock
, Sw32_unload_winsock
,
1567 "Unload the Windows socket library `winsock' if loaded.\n\
1568 This is provided to allow dial-up socket connections to be disconnected\n\
1569 when no longer needed. Returns nil without unloading winsock if any\n\
1570 socket connections still exist.")
1573 return term_winsock () ? Qt
: Qnil
;
1576 #endif /* HAVE_SOCKETS */
1579 /* Some miscellaneous functions that are Windows specific, but not GUI
1580 specific (ie. are applicable in terminal or batch mode as well). */
1582 /* lifted from fileio.c */
1583 #define CORRECT_DIR_SEPS(s) \
1584 do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \
1585 else unixtodos_filename (s); \
1588 DEFUN ("w32-short-file-name", Fw32_short_file_name
, Sw32_short_file_name
, 1, 1, 0,
1589 "Return the short file name version (8.3) of the full path of FILENAME.\n\
1590 If FILENAME does not exist, return nil.\n\
1591 All path elements in FILENAME are converted to their short names.")
1593 Lisp_Object filename
;
1595 char shortname
[MAX_PATH
];
1597 CHECK_STRING (filename
, 0);
1599 /* first expand it. */
1600 filename
= Fexpand_file_name (filename
, Qnil
);
1602 /* luckily, this returns the short version of each element in the path. */
1603 if (GetShortPathName (XSTRING (filename
)->data
, shortname
, MAX_PATH
) == 0)
1606 CORRECT_DIR_SEPS (shortname
);
1608 return build_string (shortname
);
1612 DEFUN ("w32-long-file-name", Fw32_long_file_name
, Sw32_long_file_name
,
1614 "Return the long file name version of the full path of FILENAME.\n\
1615 If FILENAME does not exist, return nil.\n\
1616 All path elements in FILENAME are converted to their long names.")
1618 Lisp_Object filename
;
1620 char longname
[ MAX_PATH
];
1622 CHECK_STRING (filename
, 0);
1624 /* first expand it. */
1625 filename
= Fexpand_file_name (filename
, Qnil
);
1627 if (!w32_get_long_filename (XSTRING (filename
)->data
, longname
, MAX_PATH
))
1630 CORRECT_DIR_SEPS (longname
);
1632 return build_string (longname
);
1635 DEFUN ("w32-set-process-priority", Fw32_set_process_priority
, Sw32_set_process_priority
,
1637 "Set the priority of PROCESS to PRIORITY.\n\
1638 If PROCESS is nil, the priority of Emacs is changed, otherwise the\n\
1639 priority of the process whose pid is PROCESS is changed.\n\
1640 PRIORITY should be one of the symbols high, normal, or low;\n\
1641 any other symbol will be interpreted as normal.\n\
1643 If successful, the return value is t, otherwise nil.")
1645 Lisp_Object process
, priority
;
1647 HANDLE proc_handle
= GetCurrentProcess ();
1648 DWORD priority_class
= NORMAL_PRIORITY_CLASS
;
1649 Lisp_Object result
= Qnil
;
1651 CHECK_SYMBOL (priority
, 0);
1653 if (!NILP (process
))
1658 CHECK_NUMBER (process
, 0);
1660 /* Allow pid to be an internally generated one, or one obtained
1661 externally. This is necessary because real pids on Win95 are
1664 pid
= XINT (process
);
1665 cp
= find_child_pid (pid
);
1667 pid
= cp
->procinfo
.dwProcessId
;
1669 proc_handle
= OpenProcess (PROCESS_SET_INFORMATION
, FALSE
, pid
);
1672 if (EQ (priority
, Qhigh
))
1673 priority_class
= HIGH_PRIORITY_CLASS
;
1674 else if (EQ (priority
, Qlow
))
1675 priority_class
= IDLE_PRIORITY_CLASS
;
1677 if (proc_handle
!= NULL
)
1679 if (SetPriorityClass (proc_handle
, priority_class
))
1681 if (!NILP (process
))
1682 CloseHandle (proc_handle
);
1689 DEFUN ("w32-get-locale-info", Fw32_get_locale_info
, Sw32_get_locale_info
, 1, 2, 0,
1690 "Return information about the Windows locale LCID.\n\
1691 By default, return a three letter locale code which encodes the default\n\
1692 language as the first two characters, and the country or regionial variant\n\
1693 as the third letter. For example, ENU refers to `English (United States)',\n\
1694 while ENC means `English (Canadian)'.\n\
1696 If the optional argument LONGFORM is non-nil, the long form of the locale\n\
1697 name is returned, e.g. `English (United States)' instead.\n\
1699 If LCID (a 16-bit number) is not a valid locale, the result is nil.")
1701 Lisp_Object lcid
, longform
;
1705 char abbrev_name
[32] = { 0 };
1706 char full_name
[256] = { 0 };
1708 CHECK_NUMBER (lcid
, 0);
1710 if (!IsValidLocale (XINT (lcid
), LCID_SUPPORTED
))
1713 if (NILP (longform
))
1715 got_abbrev
= GetLocaleInfo (XINT (lcid
),
1716 LOCALE_SABBREVLANGNAME
| LOCALE_USE_CP_ACP
,
1717 abbrev_name
, sizeof (abbrev_name
));
1719 return build_string (abbrev_name
);
1723 got_full
= GetLocaleInfo (XINT (lcid
),
1724 LOCALE_SLANGUAGE
| LOCALE_USE_CP_ACP
,
1725 full_name
, sizeof (full_name
));
1727 return build_string (full_name
);
1734 DEFUN ("w32-get-current-locale-id", Fw32_get_current_locale_id
, Sw32_get_current_locale_id
, 0, 0, 0,
1735 "Return Windows locale id for current locale setting.\n\
1736 This is a numerical value; use `w32-get-locale-info' to convert to a\n\
1737 human-readable form.")
1740 return make_number (GetThreadLocale ());
1743 DWORD
int_from_hex (char * s
)
1746 static char hex
[] = "0123456789abcdefABCDEF";
1749 while (*s
&& (p
= strchr(hex
, *s
)) != NULL
)
1751 unsigned digit
= p
- hex
;
1754 val
= val
* 16 + digit
;
1760 /* We need to build a global list, since the EnumSystemLocale callback
1761 function isn't given a context pointer. */
1762 Lisp_Object Vw32_valid_locale_ids
;
1764 BOOL CALLBACK
enum_locale_fn (LPTSTR localeNum
)
1766 DWORD id
= int_from_hex (localeNum
);
1767 Vw32_valid_locale_ids
= Fcons (make_number (id
), Vw32_valid_locale_ids
);
1771 DEFUN ("w32-get-valid-locale-ids", Fw32_get_valid_locale_ids
, Sw32_get_valid_locale_ids
, 0, 0, 0,
1772 "Return list of all valid Windows locale ids.\n\
1773 Each id is a numerical value; use `w32-get-locale-info' to convert to a\n\
1774 human-readable form.")
1777 Vw32_valid_locale_ids
= Qnil
;
1779 EnumSystemLocales (enum_locale_fn
, LCID_SUPPORTED
);
1781 Vw32_valid_locale_ids
= Fnreverse (Vw32_valid_locale_ids
);
1782 return Vw32_valid_locale_ids
;
1786 DEFUN ("w32-get-default-locale-id", Fw32_get_default_locale_id
, Sw32_get_default_locale_id
, 0, 1, 0,
1787 "Return Windows locale id for default locale setting.\n\
1788 By default, the system default locale setting is returned; if the optional\n\
1789 parameter USERP is non-nil, the user default locale setting is returned.\n\
1790 This is a numerical value; use `w32-get-locale-info' to convert to a\n\
1791 human-readable form.")
1796 return make_number (GetSystemDefaultLCID ());
1797 return make_number (GetUserDefaultLCID ());
1801 DEFUN ("w32-set-current-locale", Fw32_set_current_locale
, Sw32_set_current_locale
, 1, 1, 0,
1802 "Make Windows locale LCID be the current locale setting for Emacs.\n\
1803 If successful, the new locale id is returned, otherwise nil.")
1807 CHECK_NUMBER (lcid
, 0);
1809 if (!IsValidLocale (XINT (lcid
), LCID_SUPPORTED
))
1812 if (!SetThreadLocale (XINT (lcid
)))
1815 /* Need to set input thread locale if present. */
1816 if (dwWindowsThreadId
)
1817 /* Reply is not needed. */
1818 PostThreadMessage (dwWindowsThreadId
, WM_EMACS_SETLOCALE
, XINT (lcid
), 0);
1820 return make_number (GetThreadLocale ());
1826 Qhigh
= intern ("high");
1827 Qlow
= intern ("low");
1830 defsubr (&Sw32_has_winsock
);
1831 defsubr (&Sw32_unload_winsock
);
1833 defsubr (&Sw32_short_file_name
);
1834 defsubr (&Sw32_long_file_name
);
1835 defsubr (&Sw32_set_process_priority
);
1836 defsubr (&Sw32_get_locale_info
);
1837 defsubr (&Sw32_get_current_locale_id
);
1838 defsubr (&Sw32_get_default_locale_id
);
1839 defsubr (&Sw32_get_valid_locale_ids
);
1840 defsubr (&Sw32_set_current_locale
);
1842 DEFVAR_LISP ("w32-quote-process-args", &Vw32_quote_process_args
,
1843 "Non-nil enables quoting of process arguments to ensure correct parsing.\n\
1844 Because Windows does not directly pass argv arrays to child processes,\n\
1845 programs have to reconstruct the argv array by parsing the command\n\
1846 line string. For an argument to contain a space, it must be enclosed\n\
1847 in double quotes or it will be parsed as multiple arguments.\n\
1849 If the value is a character, that character will be used to escape any\n\
1850 quote characters that appear, otherwise a suitable escape character\n\
1851 will be chosen based on the type of the program.");
1852 Vw32_quote_process_args
= Qt
;
1854 DEFVAR_LISP ("w32-start-process-show-window",
1855 &Vw32_start_process_show_window
,
1856 "When nil, processes started via start-process hide their windows.\n\
1857 When non-nil, they show their window in the method of their choice.");
1858 Vw32_start_process_show_window
= Qnil
;
1860 DEFVAR_LISP ("w32-start-process-share-console",
1861 &Vw32_start_process_share_console
,
1862 "When nil, processes started via start-process are given a new console.\n\
1863 When non-nil, they share the Emacs console; this has the limitation of\n\
1864 allowing only only DOS subprocess to run at a time (whether started directly\n\
1865 or indirectly by Emacs), and preventing Emacs from cleanly terminating the\n\
1866 subprocess group, but may allow Emacs to interrupt a subprocess that doesn't\n\
1867 otherwise respond to interrupts from Emacs.");
1868 Vw32_start_process_share_console
= Qnil
;
1870 DEFVAR_INT ("w32-pipe-read-delay", &Vw32_pipe_read_delay
,
1871 "Forced delay before reading subprocess output.\n\
1872 This is done to improve the buffering of subprocess output, by\n\
1873 avoiding the inefficiency of frequently reading small amounts of data.\n\
1875 If positive, the value is the number of milliseconds to sleep before\n\
1876 reading the subprocess output. If negative, the magnitude is the number\n\
1877 of time slices to wait (effectively boosting the priority of the child\n\
1878 process temporarily). A value of zero disables waiting entirely.");
1879 Vw32_pipe_read_delay
= 50;
1881 DEFVAR_LISP ("w32-downcase-file-names", &Vw32_downcase_file_names
,
1882 "Non-nil means convert all-upper case file names to lower case.\n\
1883 This applies when performing completions and file name expansion.");
1884 Vw32_downcase_file_names
= Qnil
;
1887 DEFVAR_LISP ("w32-generate-fake-inodes", &Vw32_generate_fake_inodes
,
1888 "Non-nil means attempt to fake realistic inode values.\n\
1889 This works by hashing the truename of files, and should detect \n\
1890 aliasing between long and short (8.3 DOS) names, but can have\n\
1891 false positives because of hash collisions. Note that determing\n\
1892 the truename of a file can be slow.");
1893 Vw32_generate_fake_inodes
= Qnil
;
1896 DEFVAR_LISP ("w32-get-true-file-attributes", &Vw32_get_true_file_attributes
,
1897 "Non-nil means determine accurate link count in file-attributes.\n\
1898 This option slows down file-attributes noticeably, so is disabled by\n\
1899 default. Note that it is only useful for files on NTFS volumes,\n\
1900 where hard links are supported.");
1901 Vw32_get_true_file_attributes
= Qnil
;
1903 /* end of ntproc.c */