1 /* Process support for GNU Emacs on the Microsoft Windows API.
3 Copyright (C) 1992, 1995, 1999-2015 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 Drew Bliss Oct 14, 1993
22 Adapted from alarm.c by Tim Fleehart
25 #include <mingw_time.h>
37 /* must include CRT headers *before* config.h */
47 #if defined(__GNUC__) && !defined(__MINGW64__)
48 /* This definition is missing from mingw.org headers, but not MinGW64
50 extern BOOL WINAPI
IsValidLocale (LCID
, DWORD
);
53 #ifdef HAVE_LANGINFO_CODESET
60 #include "w32common.h"
65 #include "syssignal.h"
67 #include "dispextern.h" /* for xstrcasecmp */
70 #define RVA_TO_PTR(var,section,filedata) \
71 ((void *)((section)->PointerToRawData \
72 + ((DWORD_PTR)(var) - (section)->VirtualAddress) \
73 + (filedata).file_base))
75 /* Signal handlers...SIG_DFL == 0 so this is initialized correctly. */
76 static signal_handler sig_handlers
[NSIG
];
78 static sigset_t sig_mask
;
80 static CRITICAL_SECTION crit_sig
;
82 /* Improve on the CRT 'signal' implementation so that we could record
83 the SIGCHLD handler and fake interval timers. */
85 sys_signal (int sig
, signal_handler handler
)
89 /* SIGCHLD is needed for supporting subprocesses, see sys_kill
90 below. SIGALRM and SIGPROF are used by setitimer. All the
91 others are the only ones supported by the MS runtime. */
92 if (!(sig
== SIGCHLD
|| sig
== SIGSEGV
|| sig
== SIGILL
93 || sig
== SIGFPE
|| sig
== SIGABRT
|| sig
== SIGTERM
94 || sig
== SIGALRM
|| sig
== SIGPROF
))
99 old
= sig_handlers
[sig
];
100 /* SIGABRT is treated specially because w32.c installs term_ntproc
101 as its handler, so we don't want to override that afterwards.
102 Aborting Emacs works specially anyway: either by calling
103 emacs_abort directly or through terminate_due_to_signal, which
104 calls emacs_abort through emacs_raise. */
105 if (!(sig
== SIGABRT
&& old
== term_ntproc
))
107 sig_handlers
[sig
] = handler
;
108 if (!(sig
== SIGCHLD
|| sig
== SIGALRM
|| sig
== SIGPROF
))
109 signal (sig
, handler
);
114 /* Emulate sigaction. */
116 sigaction (int sig
, const struct sigaction
*act
, struct sigaction
*oact
)
118 signal_handler old
= SIG_DFL
;
122 old
= sys_signal (sig
, act
->sa_handler
);
124 old
= sig_handlers
[sig
];
133 oact
->sa_handler
= old
;
135 oact
->sa_mask
= empty_mask
;
140 /* Emulate signal sets and blocking of signals used by timers. */
143 sigemptyset (sigset_t
*set
)
150 sigaddset (sigset_t
*set
, int signo
)
157 if (signo
< 0 || signo
>= NSIG
)
163 *set
|= (1U << signo
);
169 sigfillset (sigset_t
*set
)
182 sigprocmask (int how
, const sigset_t
*set
, sigset_t
*oset
)
184 if (!(how
== SIG_BLOCK
|| how
== SIG_UNBLOCK
|| how
== SIG_SETMASK
))
205 /* FIXME: Catch signals that are blocked and reissue them when
206 they are unblocked. Important for SIGALRM and SIGPROF only. */
215 pthread_sigmask (int how
, const sigset_t
*set
, sigset_t
*oset
)
217 if (sigprocmask (how
, set
, oset
) == -1)
223 sigismember (const sigset_t
*set
, int signo
)
225 if (signo
< 0 || signo
>= NSIG
)
230 if (signo
> sizeof (*set
) * BITS_PER_CHAR
)
233 return (*set
& (1U << signo
)) != 0;
249 setpgid (pid_t pid
, pid_t pgid
)
260 /* Emulations of interval timers.
262 Limitations: only ITIMER_REAL and ITIMER_PROF are supported.
264 Implementation: a separate thread is started for each timer type,
265 the thread calls the appropriate signal handler when the timer
266 expires, after stopping the thread which installed the timer. */
269 volatile ULONGLONG expire
;
270 volatile ULONGLONG reload
;
271 volatile int terminate
;
273 HANDLE caller_thread
;
277 static ULONGLONG ticks_now
;
278 static struct itimer_data real_itimer
, prof_itimer
;
279 static ULONGLONG clocks_min
;
280 /* If non-zero, itimers are disabled. Used during shutdown, when we
281 delete the critical sections used by the timer threads. */
282 static int disable_itimers
;
284 static CRITICAL_SECTION crit_real
, crit_prof
;
286 /* GetThreadTimes is not available on Windows 9X and possibly also on 2K. */
287 typedef BOOL (WINAPI
*GetThreadTimes_Proc
) (
289 LPFILETIME lpCreationTime
,
290 LPFILETIME lpExitTime
,
291 LPFILETIME lpKernelTime
,
292 LPFILETIME lpUserTime
);
294 static GetThreadTimes_Proc s_pfn_Get_Thread_Times
;
296 #define MAX_SINGLE_SLEEP 30
297 #define TIMER_TICKS_PER_SEC 1000
299 /* Return a suitable time value, in 1-ms units, for THREAD, a handle
300 to a thread. If THREAD is NULL or an invalid handle, return the
301 current wall-clock time since January 1, 1601 (UTC). Otherwise,
302 return the sum of kernel and user times used by THREAD since it was
303 created, plus its creation time. */
305 w32_get_timer_time (HANDLE thread
)
308 int use_system_time
= 1;
309 /* The functions below return times in 100-ns units. */
310 const int tscale
= 10 * TIMER_TICKS_PER_SEC
;
312 if (thread
&& thread
!= INVALID_HANDLE_VALUE
313 && s_pfn_Get_Thread_Times
!= NULL
)
315 FILETIME creation_ftime
, exit_ftime
, kernel_ftime
, user_ftime
;
316 ULARGE_INTEGER temp_creation
, temp_kernel
, temp_user
;
318 if (s_pfn_Get_Thread_Times (thread
, &creation_ftime
, &exit_ftime
,
319 &kernel_ftime
, &user_ftime
))
322 temp_creation
.LowPart
= creation_ftime
.dwLowDateTime
;
323 temp_creation
.HighPart
= creation_ftime
.dwHighDateTime
;
324 temp_kernel
.LowPart
= kernel_ftime
.dwLowDateTime
;
325 temp_kernel
.HighPart
= kernel_ftime
.dwHighDateTime
;
326 temp_user
.LowPart
= user_ftime
.dwLowDateTime
;
327 temp_user
.HighPart
= user_ftime
.dwHighDateTime
;
329 temp_creation
.QuadPart
/ tscale
+ temp_kernel
.QuadPart
/ tscale
330 + temp_user
.QuadPart
/ tscale
;
333 DebPrint (("GetThreadTimes failed with error code %lu\n",
339 FILETIME current_ftime
;
342 GetSystemTimeAsFileTime (¤t_ftime
);
344 temp
.LowPart
= current_ftime
.dwLowDateTime
;
345 temp
.HighPart
= current_ftime
.dwHighDateTime
;
347 retval
= temp
.QuadPart
/ tscale
;
353 /* Thread function for a timer thread. */
355 timer_loop (LPVOID arg
)
357 struct itimer_data
*itimer
= (struct itimer_data
*)arg
;
358 int which
= itimer
->type
;
359 int sig
= (which
== ITIMER_REAL
) ? SIGALRM
: SIGPROF
;
360 CRITICAL_SECTION
*crit
= (which
== ITIMER_REAL
) ? &crit_real
: &crit_prof
;
361 const DWORD max_sleep
= MAX_SINGLE_SLEEP
* 1000 / TIMER_TICKS_PER_SEC
;
362 HANDLE hth
= (which
== ITIMER_REAL
) ? NULL
: itimer
->caller_thread
;
367 signal_handler handler
;
368 ULONGLONG now
, expire
, reload
;
370 /* Load new values if requested by setitimer. */
371 EnterCriticalSection (crit
);
372 expire
= itimer
->expire
;
373 reload
= itimer
->reload
;
374 LeaveCriticalSection (crit
);
375 if (itimer
->terminate
)
385 if (expire
> (now
= w32_get_timer_time (hth
)))
386 sleep_time
= expire
- now
;
389 /* Don't sleep too long at a time, to be able to see the
390 termination flag without too long a delay. */
391 while (sleep_time
> max_sleep
)
393 if (itimer
->terminate
)
396 EnterCriticalSection (crit
);
397 expire
= itimer
->expire
;
398 LeaveCriticalSection (crit
);
400 (expire
> (now
= w32_get_timer_time (hth
))) ? expire
- now
: 0;
402 if (itimer
->terminate
)
406 Sleep (sleep_time
* 1000 / TIMER_TICKS_PER_SEC
);
407 /* Always sleep past the expiration time, to make sure we
408 never call the handler _before_ the expiration time,
409 always slightly after it. Sleep(5) makes sure we don't
410 hog the CPU by calling 'w32_get_timer_time' with high
411 frequency, and also let other threads work. */
412 while (w32_get_timer_time (hth
) < expire
)
416 EnterCriticalSection (crit
);
417 expire
= itimer
->expire
;
418 LeaveCriticalSection (crit
);
423 handler
= sig_handlers
[sig
];
424 if (!(handler
== SIG_DFL
|| handler
== SIG_IGN
|| handler
== SIG_ERR
)
425 /* FIXME: Don't ignore masked signals. Instead, record that
426 they happened and reissue them when the signal is
428 && !sigismember (&sig_mask
, sig
)
429 /* Simulate masking of SIGALRM and SIGPROF when processing
431 && !fatal_error_in_progress
432 && itimer
->caller_thread
)
434 /* Simulate a signal delivered to the thread which installed
435 the timer, by suspending that thread while the handler
437 HANDLE th
= itimer
->caller_thread
;
438 DWORD result
= SuspendThread (th
);
440 if (result
== (DWORD
)-1)
447 /* Update expiration time and loop. */
448 EnterCriticalSection (crit
);
449 expire
= itimer
->expire
;
452 LeaveCriticalSection (crit
);
455 reload
= itimer
->reload
;
458 now
= w32_get_timer_time (hth
);
461 ULONGLONG lag
= now
- expire
;
463 /* If we missed some opportunities (presumably while
464 sleeping or while the signal handler ran), skip
467 expire
= now
- (lag
% reload
);
473 expire
= 0; /* become idle */
474 itimer
->expire
= expire
;
475 LeaveCriticalSection (crit
);
481 stop_timer_thread (int which
)
483 struct itimer_data
*itimer
=
484 (which
== ITIMER_REAL
) ? &real_itimer
: &prof_itimer
;
486 DWORD err
, exit_code
= 255;
489 /* Signal the thread that it should terminate. */
490 itimer
->terminate
= 1;
492 if (itimer
->timer_thread
== NULL
)
495 /* Wait for the timer thread to terminate voluntarily, then kill it
496 if it doesn't. This loop waits twice more than the maximum
497 amount of time a timer thread sleeps, see above. */
498 for (i
= 0; i
< MAX_SINGLE_SLEEP
/ 5; i
++)
500 if (!((status
= GetExitCodeThread (itimer
->timer_thread
, &exit_code
))
501 && exit_code
== STILL_ACTIVE
))
505 if ((status
== FALSE
&& (err
= GetLastError ()) == ERROR_INVALID_HANDLE
)
506 || exit_code
== STILL_ACTIVE
)
508 if (!(status
== FALSE
&& err
== ERROR_INVALID_HANDLE
))
509 TerminateThread (itimer
->timer_thread
, 0);
513 CloseHandle (itimer
->timer_thread
);
514 itimer
->timer_thread
= NULL
;
515 if (itimer
->caller_thread
)
517 CloseHandle (itimer
->caller_thread
);
518 itimer
->caller_thread
= NULL
;
522 /* This is called at shutdown time from term_ntproc. */
526 if (real_itimer
.timer_thread
)
527 stop_timer_thread (ITIMER_REAL
);
528 if (prof_itimer
.timer_thread
)
529 stop_timer_thread (ITIMER_PROF
);
531 /* We are going to delete the critical sections, so timers cannot
535 DeleteCriticalSection (&crit_real
);
536 DeleteCriticalSection (&crit_prof
);
537 DeleteCriticalSection (&crit_sig
);
540 /* This is called at initialization time from init_ntproc. */
544 /* GetThreadTimes is not available on all versions of Windows, so
545 need to probe for its availability dynamically, and call it
546 through a pointer. */
547 s_pfn_Get_Thread_Times
= NULL
; /* in case dumped Emacs comes with a value */
548 if (os_subtype
!= OS_9X
)
549 s_pfn_Get_Thread_Times
=
550 (GetThreadTimes_Proc
)GetProcAddress (GetModuleHandle ("kernel32.dll"),
553 /* Make sure we start with zeroed out itimer structures, since
554 dumping may have left there traces of threads long dead. */
555 memset (&real_itimer
, 0, sizeof real_itimer
);
556 memset (&prof_itimer
, 0, sizeof prof_itimer
);
558 InitializeCriticalSection (&crit_real
);
559 InitializeCriticalSection (&crit_prof
);
560 InitializeCriticalSection (&crit_sig
);
566 start_timer_thread (int which
)
568 DWORD exit_code
, tid
;
570 struct itimer_data
*itimer
=
571 (which
== ITIMER_REAL
) ? &real_itimer
: &prof_itimer
;
573 if (itimer
->timer_thread
574 && GetExitCodeThread (itimer
->timer_thread
, &exit_code
)
575 && exit_code
== STILL_ACTIVE
)
578 /* Clean up after possibly exited thread. */
579 if (itimer
->timer_thread
)
581 CloseHandle (itimer
->timer_thread
);
582 itimer
->timer_thread
= NULL
;
584 if (itimer
->caller_thread
)
586 CloseHandle (itimer
->caller_thread
);
587 itimer
->caller_thread
= NULL
;
590 /* Start a new thread. */
591 if (!DuplicateHandle (GetCurrentProcess (), GetCurrentThread (),
592 GetCurrentProcess (), &th
, 0, FALSE
,
593 DUPLICATE_SAME_ACCESS
))
598 itimer
->terminate
= 0;
599 itimer
->type
= which
;
600 itimer
->caller_thread
= th
;
601 /* Request that no more than 64KB of stack be reserved for this
602 thread, to avoid reserving too much memory, which would get in
603 the way of threads we start to wait for subprocesses. See also
605 itimer
->timer_thread
= CreateThread (NULL
, 64 * 1024, timer_loop
,
606 (void *)itimer
, 0x00010000, &tid
);
608 if (!itimer
->timer_thread
)
610 CloseHandle (itimer
->caller_thread
);
611 itimer
->caller_thread
= NULL
;
616 /* This is needed to make sure that the timer thread running for
617 profiling gets CPU as soon as the Sleep call terminates. */
618 if (which
== ITIMER_PROF
)
619 SetThreadPriority (itimer
->timer_thread
, THREAD_PRIORITY_TIME_CRITICAL
);
624 /* Most of the code of getitimer and setitimer (but not of their
625 subroutines) was shamelessly stolen from itimer.c in the DJGPP
626 library, see www.delorie.com/djgpp. */
628 getitimer (int which
, struct itimerval
*value
)
630 volatile ULONGLONG
*t_expire
;
631 volatile ULONGLONG
*t_reload
;
632 ULONGLONG expire
, reload
;
634 CRITICAL_SECTION
*crit
;
635 struct itimer_data
*itimer
;
646 if (which
!= ITIMER_REAL
&& which
!= ITIMER_PROF
)
652 itimer
= (which
== ITIMER_REAL
) ? &real_itimer
: &prof_itimer
;
654 ticks_now
= w32_get_timer_time ((which
== ITIMER_REAL
)
656 : GetCurrentThread ());
658 t_expire
= &itimer
->expire
;
659 t_reload
= &itimer
->reload
;
660 crit
= (which
== ITIMER_REAL
) ? &crit_real
: &crit_prof
;
662 EnterCriticalSection (crit
);
665 LeaveCriticalSection (crit
);
670 value
->it_value
.tv_sec
= expire
/ TIMER_TICKS_PER_SEC
;
672 (expire
% TIMER_TICKS_PER_SEC
) * (__int64
)1000000 / TIMER_TICKS_PER_SEC
;
673 value
->it_value
.tv_usec
= usecs
;
674 value
->it_interval
.tv_sec
= reload
/ TIMER_TICKS_PER_SEC
;
676 (reload
% TIMER_TICKS_PER_SEC
) * (__int64
)1000000 / TIMER_TICKS_PER_SEC
;
677 value
->it_interval
.tv_usec
= usecs
;
683 setitimer(int which
, struct itimerval
*value
, struct itimerval
*ovalue
)
685 volatile ULONGLONG
*t_expire
, *t_reload
;
686 ULONGLONG expire
, reload
, expire_old
, reload_old
;
688 CRITICAL_SECTION
*crit
;
689 struct itimerval tem
, *ptem
;
694 /* Posix systems expect timer values smaller than the resolution of
695 the system clock be rounded up to the clock resolution. First
696 time we are called, measure the clock tick resolution. */
701 for (t1
= w32_get_timer_time (NULL
);
702 (t2
= w32_get_timer_time (NULL
)) == t1
; )
704 clocks_min
= t2
- t1
;
712 if (getitimer (which
, ptem
)) /* also sets ticks_now */
713 return -1; /* errno already set */
716 (which
== ITIMER_REAL
) ? &real_itimer
.expire
: &prof_itimer
.expire
;
718 (which
== ITIMER_REAL
) ? &real_itimer
.reload
: &prof_itimer
.reload
;
720 crit
= (which
== ITIMER_REAL
) ? &crit_real
: &crit_prof
;
723 || (value
->it_value
.tv_sec
== 0 && value
->it_value
.tv_usec
== 0))
725 EnterCriticalSection (crit
);
726 /* Disable the timer. */
729 LeaveCriticalSection (crit
);
733 reload
= value
->it_interval
.tv_sec
* TIMER_TICKS_PER_SEC
;
735 usecs
= value
->it_interval
.tv_usec
;
736 if (value
->it_interval
.tv_sec
== 0
737 && usecs
&& usecs
* TIMER_TICKS_PER_SEC
< clocks_min
* 1000000)
741 usecs
*= TIMER_TICKS_PER_SEC
;
742 reload
+= usecs
/ 1000000;
745 expire
= value
->it_value
.tv_sec
* TIMER_TICKS_PER_SEC
;
746 usecs
= value
->it_value
.tv_usec
;
747 if (value
->it_value
.tv_sec
== 0
748 && usecs
* TIMER_TICKS_PER_SEC
< clocks_min
* 1000000)
752 usecs
*= TIMER_TICKS_PER_SEC
;
753 expire
+= usecs
/ 1000000;
758 EnterCriticalSection (crit
);
759 expire_old
= *t_expire
;
760 reload_old
= *t_reload
;
761 if (!(expire
== expire_old
&& reload
== reload_old
))
766 LeaveCriticalSection (crit
);
768 return start_timer_thread (which
);
774 #ifdef HAVE_SETITIMER
775 struct itimerval new_values
, old_values
;
777 new_values
.it_value
.tv_sec
= seconds
;
778 new_values
.it_value
.tv_usec
= 0;
779 new_values
.it_interval
.tv_sec
= new_values
.it_interval
.tv_usec
= 0;
781 if (setitimer (ITIMER_REAL
, &new_values
, &old_values
) < 0)
783 return old_values
.it_value
.tv_sec
;
791 /* Here's an overview of how support for subprocesses and
792 network/serial streams is implemented on MS-Windows.
794 The management of both subprocesses and network/serial streams
795 circles around the child_procs[] array, which can record up to the
796 grand total of MAX_CHILDREN (= 32) of these. (The reasons for the
797 32 limitation will become clear below.) Each member of
798 child_procs[] is a child_process structure, defined on w32.h.
800 A related data structure is the fd_info[] array, which holds twice
801 as many members, 64, and records the information about file
802 descriptors used for communicating with subprocesses and
803 network/serial devices. Each member of the array is the filedesc
804 structure, which records the Windows handle for communications,
805 such as the read end of the pipe to a subprocess, a socket handle,
808 Both these arrays reference each other: there's a member of
809 child_process structure that records the corresponding file
810 descriptor, and there's a member of filedesc structure that holds a
811 pointer to the corresponding child_process.
813 Whenever Emacs starts a subprocess or opens a network/serial
814 stream, the function new_child is called to prepare a new
815 child_process structure. new_child looks for the first vacant slot
816 in the child_procs[] array, initializes it, and starts a "reader
817 thread" that will watch the output of the subprocess/stream and its
818 status. (If no vacant slot can be found, new_child returns a
819 failure indication to its caller, and the higher-level Emacs
820 primitive that called it will then fail with EMFILE or EAGAIN.)
822 The reader thread started by new_child communicates with the main
823 (a.k.a. "Lisp") thread via two event objects and a status, all of
824 them recorded by the members of the child_process structure in
825 child_procs[]. The event objects serve as semaphores between the
826 reader thread and the 'pselect' emulation in sys_select, as follows:
828 . Initially, the reader thread is waiting for the char_consumed
829 event to become signaled by sys_select, which is an indication
830 for the reader thread to go ahead and try reading more stuff
831 from the subprocess/stream.
833 . The reader thread then attempts to read by calling a
834 blocking-read function. When the read call returns, either
835 successfully or with some failure indication, the reader thread
836 updates the status of the read accordingly, and signals the 2nd
837 event object, char_avail, on whose handle sys_select is
838 waiting. This tells sys_select that the file descriptor
839 allocated for the subprocess or the the stream is ready to be
842 When the subprocess exits or the network/serial stream is closed,
843 the reader thread sets the status accordingly and exits. It also
844 exits when the main thread sets the status to STATUS_READ_ERROR
845 and/or the char_avail and char_consumed event handles become NULL;
846 this is how delete_child, called by Emacs when a subprocess or a
847 stream is terminated, terminates the reader thread as part of
848 deleting the child_process object.
850 The sys_select function emulates the Posix 'pselect' function; it
851 is needed because the Windows 'select' function supports only
852 network sockets, while Emacs expects 'pselect' to work for any file
853 descriptor, including pipes and serial streams.
855 When sys_select is called, it uses the information in fd_info[]
856 array to convert the file descriptors which it was asked to watch
857 into Windows handles. In general, the handle to watch is the
858 handle of the char_avail event of the child_process structure that
859 corresponds to the file descriptor. In addition, for subprocesses,
860 sys_select watches one more handle: the handle for the subprocess,
861 so that it could emulate the SIGCHLD signal when the subprocess
864 If file descriptor zero (stdin) doesn't have its bit set in the
865 'rfds' argument to sys_select, the function always watches for
866 keyboard interrupts, to be able to interrupt the wait and return
867 when the user presses C-g.
869 Having collected the handles to watch, sys_select calls
870 WaitForMultipleObjects to wait for any one of them to become
871 signaled. Since WaitForMultipleObjects can only watch up to 64
872 handles, Emacs on Windows is limited to maximum 32 child_process
873 objects (since a subprocess consumes 2 handles to be watched, see
876 When any of the handles become signaled, sys_select does whatever
877 is appropriate for the corresponding child_process object:
879 . If it's a handle to the char_avail event, sys_select marks the
880 corresponding bit in 'rfds', and Emacs will then read from that
883 . If it's a handle to the process, sys_select calls the SIGCHLD
884 handler, to inform Emacs of the fact that the subprocess
887 The waitpid emulation works very similar to sys_select, except that
888 it only watches handles of subprocesses, and doesn't synchronize
889 with the reader thread.
891 Because socket descriptors on Windows are handles, while Emacs
892 expects them to be file descriptors, all low-level I/O functions,
893 such as 'read' and 'write', and all socket operations, like
894 'connect', 'recvfrom', 'accept', etc., are redirected to the
895 corresponding 'sys_*' functions, which must convert a file
896 descriptor to a handle using the fd_info[] array, and then invoke
897 the corresponding Windows API on the handle. Most of these
898 redirected 'sys_*' functions are implemented on w32.c.
900 When the file descriptor was produced by functions such as 'open',
901 the corresponding handle is obtained by calling _get_osfhandle. To
902 produce a file descriptor for a socket handle, which has no file
903 descriptor as far as Windows is concerned, the function
904 socket_to_fd opens the null device; the resulting file descriptor
905 will never be used directly in any I/O API, but serves as an index
906 into the fd_info[] array, where the socket handle is stored. The
907 SOCK_HANDLE macro retrieves the handle when given the file
910 The function sys_kill emulates the Posix 'kill' functionality to
911 terminate other processes. It does that by attaching to the
912 foreground window of the process and sending a Ctrl-C or Ctrl-BREAK
913 signal to the process; if that doesn't work, then it calls
914 TerminateProcess to forcibly terminate the process. Note that this
915 only terminates the immediate process whose PID was passed to
916 sys_kill; it doesn't terminate the child processes of that process.
917 This means, for example, that an Emacs subprocess run through a
918 shell might not be killed, because sys_kill will only terminate the
919 shell. (In practice, however, such problems are very rare.) */
921 /* Defined in <process.h> which conflicts with the local copy */
924 /* Child process management list. */
925 int child_proc_count
= 0;
926 child_process child_procs
[ MAX_CHILDREN
];
928 static DWORD WINAPI
reader_thread (void *arg
);
930 /* Find an unused process slot. */
937 for (cp
= child_procs
+ (child_proc_count
-1); cp
>= child_procs
; cp
--)
938 if (!CHILD_ACTIVE (cp
) && cp
->procinfo
.hProcess
== NULL
)
940 if (child_proc_count
== MAX_CHILDREN
)
943 child_process
*dead_cp
= NULL
;
945 DebPrint (("new_child: No vacant slots, looking for dead processes\n"));
946 for (cp
= child_procs
+ (child_proc_count
-1); cp
>= child_procs
; cp
--)
947 if (!CHILD_ACTIVE (cp
) && cp
->procinfo
.hProcess
)
951 if (!GetExitCodeProcess (cp
->procinfo
.hProcess
, &status
))
953 DebPrint (("new_child.GetExitCodeProcess: error %lu for PID %lu\n",
954 GetLastError (), cp
->procinfo
.dwProcessId
));
955 status
= STILL_ACTIVE
;
957 if (status
!= STILL_ACTIVE
958 || WaitForSingleObject (cp
->procinfo
.hProcess
, 0) == WAIT_OBJECT_0
)
960 DebPrint (("new_child: Freeing slot of dead process %d, fd %d\n",
961 cp
->procinfo
.dwProcessId
, cp
->fd
));
962 CloseHandle (cp
->procinfo
.hProcess
);
963 cp
->procinfo
.hProcess
= NULL
;
964 CloseHandle (cp
->procinfo
.hThread
);
965 cp
->procinfo
.hThread
= NULL
;
966 /* Free up to 2 dead slots at a time, so that if we
967 have a lot of them, they will eventually all be
968 freed when the tornado ends. */
982 if (child_proc_count
== MAX_CHILDREN
)
984 cp
= &child_procs
[child_proc_count
++];
987 /* Last opportunity to avoid leaking handles before we forget them
989 if (cp
->procinfo
.hProcess
)
990 CloseHandle (cp
->procinfo
.hProcess
);
991 if (cp
->procinfo
.hThread
)
992 CloseHandle (cp
->procinfo
.hThread
);
993 memset (cp
, 0, sizeof (*cp
));
996 cp
->procinfo
.hProcess
= NULL
;
997 cp
->status
= STATUS_READ_ERROR
;
999 /* use manual reset event so that select() will function properly */
1000 cp
->char_avail
= CreateEvent (NULL
, TRUE
, FALSE
, NULL
);
1003 cp
->char_consumed
= CreateEvent (NULL
, FALSE
, FALSE
, NULL
);
1004 if (cp
->char_consumed
)
1006 /* The 0x00010000 flag is STACK_SIZE_PARAM_IS_A_RESERVATION.
1007 It means that the 64K stack we are requesting in the 2nd
1008 argument is how much memory should be reserved for the
1009 stack. If we don't use this flag, the memory requested
1010 by the 2nd argument is the amount actually _committed_,
1011 but Windows reserves 8MB of memory for each thread's
1012 stack. (The 8MB figure comes from the -stack
1013 command-line argument we pass to the linker when building
1014 Emacs, but that's because we need a large stack for
1015 Emacs's main thread.) Since we request 2GB of reserved
1016 memory at startup (see w32heap.c), which is close to the
1017 maximum memory available for a 32-bit process on Windows,
1018 the 8MB reservation for each thread causes failures in
1019 starting subprocesses, because we create a thread running
1020 reader_thread for each subprocess. As 8MB of stack is
1021 way too much for reader_thread, forcing Windows to
1022 reserve less wins the day. */
1023 cp
->thrd
= CreateThread (NULL
, 64 * 1024, reader_thread
, cp
,
1034 delete_child (child_process
*cp
)
1038 /* Should not be deleting a child that is still needed. */
1039 for (i
= 0; i
< MAXDESC
; i
++)
1040 if (fd_info
[i
].cp
== cp
)
1043 if (!CHILD_ACTIVE (cp
) && cp
->procinfo
.hProcess
== NULL
)
1046 /* reap thread if necessary */
1051 if (GetExitCodeThread (cp
->thrd
, &rc
) && rc
== STILL_ACTIVE
)
1053 /* let the thread exit cleanly if possible */
1054 cp
->status
= STATUS_READ_ERROR
;
1055 SetEvent (cp
->char_consumed
);
1057 /* We used to forcibly terminate the thread here, but it
1058 is normally unnecessary, and in abnormal cases, the worst that
1059 will happen is we have an extra idle thread hanging around
1060 waiting for the zombie process. */
1061 if (WaitForSingleObject (cp
->thrd
, 1000) != WAIT_OBJECT_0
)
1063 DebPrint (("delete_child.WaitForSingleObject (thread) failed "
1064 "with %lu for fd %ld\n", GetLastError (), cp
->fd
));
1065 TerminateThread (cp
->thrd
, 0);
1069 CloseHandle (cp
->thrd
);
1074 CloseHandle (cp
->char_avail
);
1075 cp
->char_avail
= NULL
;
1077 if (cp
->char_consumed
)
1079 CloseHandle (cp
->char_consumed
);
1080 cp
->char_consumed
= NULL
;
1083 /* update child_proc_count (highest numbered slot in use plus one) */
1084 if (cp
== child_procs
+ child_proc_count
- 1)
1086 for (i
= child_proc_count
-1; i
>= 0; i
--)
1087 if (CHILD_ACTIVE (&child_procs
[i
])
1088 || child_procs
[i
].procinfo
.hProcess
!= NULL
)
1090 child_proc_count
= i
+ 1;
1095 child_proc_count
= 0;
1098 /* Find a child by pid. */
1099 static child_process
*
1100 find_child_pid (DWORD pid
)
1104 for (cp
= child_procs
+ (child_proc_count
-1); cp
>= child_procs
; cp
--)
1105 if ((CHILD_ACTIVE (cp
) || cp
->procinfo
.hProcess
!= NULL
)
1112 release_listen_threads (void)
1116 for (i
= child_proc_count
- 1; i
>= 0; i
--)
1118 if (CHILD_ACTIVE (&child_procs
[i
])
1119 && (fd_info
[child_procs
[i
].fd
].flags
& FILE_LISTEN
))
1120 child_procs
[i
].status
= STATUS_READ_ERROR
;
1124 /* Thread proc for child process and socket reader threads. Each thread
1125 is normally blocked until woken by select() to check for input by
1126 reading one char. When the read completes, char_avail is signaled
1127 to wake up the select emulator and the thread blocks itself again. */
1129 reader_thread (void *arg
)
1134 cp
= (child_process
*)arg
;
1136 /* We have to wait for the go-ahead before we can start */
1138 || WaitForSingleObject (cp
->char_consumed
, INFINITE
) != WAIT_OBJECT_0
1146 if (cp
->fd
>= 0 && (fd_info
[cp
->fd
].flags
& FILE_CONNECT
) != 0)
1147 rc
= _sys_wait_connect (cp
->fd
);
1148 else if (cp
->fd
>= 0 && (fd_info
[cp
->fd
].flags
& FILE_LISTEN
) != 0)
1149 rc
= _sys_wait_accept (cp
->fd
);
1151 rc
= _sys_read_ahead (cp
->fd
);
1153 /* Don't bother waiting for the event if we already have been
1154 told to exit by delete_child. */
1155 if (cp
->status
== STATUS_READ_ERROR
|| !cp
->char_avail
)
1158 /* The name char_avail is a misnomer - it really just means the
1159 read-ahead has completed, whether successfully or not. */
1160 if (!SetEvent (cp
->char_avail
))
1162 DebPrint (("reader_thread.SetEvent(0x%x) failed with %lu for fd %ld (PID %d)\n",
1163 (DWORD_PTR
)cp
->char_avail
, GetLastError (),
1168 if (rc
== STATUS_READ_ERROR
|| rc
== STATUS_CONNECT_FAILED
)
1171 /* If the read died, the child has died so let the thread die */
1172 if (rc
== STATUS_READ_FAILED
)
1175 /* Don't bother waiting for the acknowledge if we already have
1176 been told to exit by delete_child. */
1177 if (cp
->status
== STATUS_READ_ERROR
|| !cp
->char_consumed
)
1180 /* Wait until our input is acknowledged before reading again */
1181 if (WaitForSingleObject (cp
->char_consumed
, INFINITE
) != WAIT_OBJECT_0
)
1183 DebPrint (("reader_thread.WaitForSingleObject failed with "
1184 "%lu for fd %ld\n", GetLastError (), cp
->fd
));
1187 /* delete_child sets status to STATUS_READ_ERROR when it wants
1189 if (cp
->status
== STATUS_READ_ERROR
)
1195 /* To avoid Emacs changing directory, we just record here the
1196 directory the new process should start in. This is set just before
1197 calling sys_spawnve, and is not generally valid at any other time.
1198 Note that this directory's name is UTF-8 encoded. */
1199 static char * process_dir
;
1202 create_child (char *exe
, char *cmdline
, char *env
, int is_gui_app
,
1203 pid_t
* pPid
, child_process
*cp
)
1206 SECURITY_ATTRIBUTES sec_attrs
;
1208 SECURITY_DESCRIPTOR sec_desc
;
1211 char dir
[ MAX_PATH
];
1215 if (cp
== NULL
) emacs_abort ();
1217 memset (&start
, 0, sizeof (start
));
1218 start
.cb
= sizeof (start
);
1221 if (NILP (Vw32_start_process_show_window
) && !is_gui_app
)
1222 start
.dwFlags
= STARTF_USESTDHANDLES
| STARTF_USESHOWWINDOW
;
1224 start
.dwFlags
= STARTF_USESTDHANDLES
;
1225 start
.wShowWindow
= SW_HIDE
;
1227 start
.hStdInput
= GetStdHandle (STD_INPUT_HANDLE
);
1228 start
.hStdOutput
= GetStdHandle (STD_OUTPUT_HANDLE
);
1229 start
.hStdError
= GetStdHandle (STD_ERROR_HANDLE
);
1230 #endif /* HAVE_NTGUI */
1233 /* Explicitly specify no security */
1234 if (!InitializeSecurityDescriptor (&sec_desc
, SECURITY_DESCRIPTOR_REVISION
))
1236 if (!SetSecurityDescriptorDacl (&sec_desc
, TRUE
, NULL
, FALSE
))
1239 sec_attrs
.nLength
= sizeof (sec_attrs
);
1240 sec_attrs
.lpSecurityDescriptor
= NULL
/* &sec_desc */;
1241 sec_attrs
.bInheritHandle
= FALSE
;
1243 filename_to_ansi (process_dir
, dir
);
1244 /* Can't use unixtodos_filename here, since that needs its file name
1245 argument encoded in UTF-8. OTOH, process_dir, which _is_ in
1246 UTF-8, points, to the directory computed by our caller, and we
1247 don't want to modify that, either. */
1248 for (p
= dir
; *p
; p
= CharNextA (p
))
1252 /* CreateProcess handles batch files as exe specially. This special
1253 handling fails when both the batch file and arguments are quoted.
1254 We pass NULL as exe to avoid the special handling. */
1255 if (exe
&& cmdline
[0] == '"' &&
1256 (ext
= strrchr (exe
, '.')) &&
1257 (xstrcasecmp (ext
, ".bat") == 0
1258 || xstrcasecmp (ext
, ".cmd") == 0))
1261 flags
= (!NILP (Vw32_start_process_share_console
)
1262 ? CREATE_NEW_PROCESS_GROUP
1263 : CREATE_NEW_CONSOLE
);
1264 if (NILP (Vw32_start_process_inherit_error_mode
))
1265 flags
|= CREATE_DEFAULT_ERROR_MODE
;
1266 if (!CreateProcessA (exe
, cmdline
, &sec_attrs
, NULL
, TRUE
,
1267 flags
, env
, dir
, &start
, &cp
->procinfo
))
1270 cp
->pid
= (int) cp
->procinfo
.dwProcessId
;
1272 /* Hack for Windows 95, which assigns large (ie negative) pids */
1281 DebPrint (("create_child.CreateProcess failed: %ld\n", GetLastError ()););
1285 /* create_child doesn't know what emacs's file handle will be for waiting
1286 on output from the child, so we need to make this additional call
1287 to register the handle with the process
1288 This way the select emulator knows how to match file handles with
1289 entries in child_procs. */
1291 register_child (pid_t pid
, int fd
)
1295 cp
= find_child_pid ((DWORD
)pid
);
1298 DebPrint (("register_child unable to find pid %lu\n", pid
));
1303 DebPrint (("register_child registered fd %d with pid %lu\n", fd
, pid
));
1308 /* thread is initially blocked until select is called; set status so
1309 that select will release thread */
1310 cp
->status
= STATUS_READ_ACKNOWLEDGED
;
1312 /* attach child_process to fd_info */
1313 if (fd_info
[fd
].cp
!= NULL
)
1315 DebPrint (("register_child: fd_info[%d] apparently in use!\n", fd
));
1319 fd_info
[fd
].cp
= cp
;
1322 /* Called from waitpid when a process exits. */
1324 reap_subprocess (child_process
*cp
)
1326 if (cp
->procinfo
.hProcess
)
1328 /* Reap the process */
1330 /* Process should have already died before we are called. */
1331 if (WaitForSingleObject (cp
->procinfo
.hProcess
, 0) != WAIT_OBJECT_0
)
1332 DebPrint (("reap_subprocess: child for fd %d has not died yet!", cp
->fd
));
1334 CloseHandle (cp
->procinfo
.hProcess
);
1335 cp
->procinfo
.hProcess
= NULL
;
1336 CloseHandle (cp
->procinfo
.hThread
);
1337 cp
->procinfo
.hThread
= NULL
;
1340 /* If cp->fd was not closed yet, we might be still reading the
1341 process output, so don't free its resources just yet. The call
1342 to delete_child on behalf of this subprocess will be made by
1343 sys_read when the subprocess output is fully read. */
1348 /* Wait for a child process specified by PID, or for any of our
1349 existing child processes (if PID is nonpositive) to die. When it
1350 does, close its handle. Return the pid of the process that died
1351 and fill in STATUS if non-NULL. */
1354 waitpid (pid_t pid
, int *status
, int options
)
1356 DWORD active
, retval
;
1358 child_process
*cp
, *cps
[MAX_CHILDREN
];
1359 HANDLE wait_hnd
[MAX_CHILDREN
];
1361 int dont_wait
= (options
& WNOHANG
) != 0;
1364 /* According to Posix:
1366 PID = -1 means status is requested for any child process.
1368 PID > 0 means status is requested for a single child process
1371 PID = 0 means status is requested for any child process whose
1372 process group ID is equal to that of the calling process. But
1373 since Windows has only a limited support for process groups (only
1374 for console processes and only for the purposes of passing
1375 Ctrl-BREAK signal to them), and since we have no documented way
1376 of determining whether a given process belongs to our group, we
1379 PID < -1 means status is requested for any child process whose
1380 process group ID is equal to the absolute value of PID. Again,
1381 since we don't support process groups, we treat that as -1. */
1386 /* We are requested to wait for a specific child. */
1387 for (cp
= child_procs
+ (child_proc_count
-1); cp
>= child_procs
; cp
--)
1389 /* Some child_procs might be sockets; ignore them. Also
1390 ignore subprocesses whose output is not yet completely
1392 if (CHILD_ACTIVE (cp
)
1393 && cp
->procinfo
.hProcess
1402 if (cp
->fd
< 0 || (fd_info
[cp
->fd
].flags
& FILE_AT_EOF
) != 0)
1404 wait_hnd
[nh
] = cp
->procinfo
.hProcess
;
1410 /* PID specifies our subprocess, but its status is not
1417 /* No such child process, or nothing to wait for, so fail. */
1424 for (cp
= child_procs
+ (child_proc_count
-1); cp
>= child_procs
; cp
--)
1426 if (CHILD_ACTIVE (cp
)
1427 && cp
->procinfo
.hProcess
1428 && (cp
->fd
< 0 || (fd_info
[cp
->fd
].flags
& FILE_AT_EOF
) != 0))
1430 wait_hnd
[nh
] = cp
->procinfo
.hProcess
;
1437 /* Nothing to wait on, so fail. */
1446 timeout_ms
= 1000; /* check for quit about once a second. */
1451 active
= WaitForMultipleObjects (nh
, wait_hnd
, FALSE
, timeout_ms
);
1452 } while (active
== WAIT_TIMEOUT
&& !dont_wait
);
1454 if (active
== WAIT_FAILED
)
1459 else if (active
== WAIT_TIMEOUT
&& dont_wait
)
1461 /* PID specifies our subprocess, but it didn't exit yet, so its
1462 status is not yet available. */
1464 DebPrint (("Wait: PID %d not reap yet\n", cp
->pid
));
1468 else if (active
>= WAIT_OBJECT_0
1469 && active
< WAIT_OBJECT_0
+MAXIMUM_WAIT_OBJECTS
)
1471 active
-= WAIT_OBJECT_0
;
1473 else if (active
>= WAIT_ABANDONED_0
1474 && active
< WAIT_ABANDONED_0
+MAXIMUM_WAIT_OBJECTS
)
1476 active
-= WAIT_ABANDONED_0
;
1481 if (!GetExitCodeProcess (wait_hnd
[active
], &retval
))
1483 DebPrint (("Wait.GetExitCodeProcess failed with %lu\n",
1487 if (retval
== STILL_ACTIVE
)
1489 /* Should never happen. */
1490 DebPrint (("Wait.WaitForMultipleObjects returned an active process\n"));
1491 if (pid
> 0 && dont_wait
)
1497 /* Massage the exit code from the process to match the format expected
1498 by the WIFSTOPPED et al macros in syswait.h. Only WIFSIGNALED and
1499 WIFEXITED are supported; WIFSTOPPED doesn't make sense under NT. */
1501 if (retval
== STATUS_CONTROL_C_EXIT
)
1506 if (pid
> 0 && active
!= 0)
1511 DebPrint (("Wait signaled with process pid %d\n", cp
->pid
));
1516 reap_subprocess (cp
);
1521 /* Old versions of w32api headers don't have separate 32-bit and
1522 64-bit defines, but the one they have matches the 32-bit variety. */
1523 #ifndef IMAGE_NT_OPTIONAL_HDR32_MAGIC
1524 # define IMAGE_NT_OPTIONAL_HDR32_MAGIC IMAGE_NT_OPTIONAL_HDR_MAGIC
1525 # define IMAGE_OPTIONAL_HEADER32 IMAGE_OPTIONAL_HEADER
1528 /* Implementation note: This function works with file names encoded in
1529 the current ANSI codepage. */
1531 w32_executable_type (char * filename
,
1533 int * is_cygnus_app
,
1537 file_data executable
;
1541 /* Default values in case we can't tell for sure. */
1542 *is_dos_app
= FALSE
;
1543 *is_cygnus_app
= FALSE
;
1544 *is_msys_app
= FALSE
;
1545 *is_gui_app
= FALSE
;
1547 if (!open_input_file (&executable
, filename
))
1550 p
= strrchr (filename
, '.');
1552 /* We can only identify DOS .com programs from the extension. */
1553 if (p
&& xstrcasecmp (p
, ".com") == 0)
1555 else if (p
&& (xstrcasecmp (p
, ".bat") == 0
1556 || xstrcasecmp (p
, ".cmd") == 0))
1558 /* A DOS shell script - it appears that CreateProcess is happy to
1559 accept this (somewhat surprisingly); presumably it looks at
1560 COMSPEC to determine what executable to actually invoke.
1561 Therefore, we have to do the same here as well. */
1562 /* Actually, I think it uses the program association for that
1563 extension, which is defined in the registry. */
1564 p
= egetenv ("COMSPEC");
1566 retval
= w32_executable_type (p
, is_dos_app
, is_cygnus_app
, is_msys_app
,
1571 /* Look for DOS .exe signature - if found, we must also check that
1572 it isn't really a 16- or 32-bit Windows exe, since both formats
1573 start with a DOS program stub. Note that 16-bit Windows
1574 executables use the OS/2 1.x format. */
1576 IMAGE_DOS_HEADER
* dos_header
;
1577 IMAGE_NT_HEADERS
* nt_header
;
1579 dos_header
= (PIMAGE_DOS_HEADER
) executable
.file_base
;
1580 if (dos_header
->e_magic
!= IMAGE_DOS_SIGNATURE
)
1583 nt_header
= (PIMAGE_NT_HEADERS
) ((unsigned char *) dos_header
+ dos_header
->e_lfanew
);
1585 if ((char *) nt_header
> (char *) dos_header
+ executable
.size
)
1587 /* Some dos headers (pkunzip) have bogus e_lfanew fields. */
1590 else if (nt_header
->Signature
!= IMAGE_NT_SIGNATURE
1591 && LOWORD (nt_header
->Signature
) != IMAGE_OS2_SIGNATURE
)
1595 else if (nt_header
->Signature
== IMAGE_NT_SIGNATURE
)
1597 IMAGE_DATA_DIRECTORY
*data_dir
= NULL
;
1598 if (nt_header
->OptionalHeader
.Magic
== IMAGE_NT_OPTIONAL_HDR32_MAGIC
)
1600 /* Ensure we are using the 32 bit structure. */
1601 IMAGE_OPTIONAL_HEADER32
*opt
1602 = (IMAGE_OPTIONAL_HEADER32
*) &(nt_header
->OptionalHeader
);
1603 data_dir
= opt
->DataDirectory
;
1604 *is_gui_app
= (opt
->Subsystem
== IMAGE_SUBSYSTEM_WINDOWS_GUI
);
1606 /* MingW 3.12 has the required 64 bit structs, but in case older
1607 versions don't, only check 64 bit exes if we know how. */
1608 #ifdef IMAGE_NT_OPTIONAL_HDR64_MAGIC
1609 else if (nt_header
->OptionalHeader
.Magic
1610 == IMAGE_NT_OPTIONAL_HDR64_MAGIC
)
1612 IMAGE_OPTIONAL_HEADER64
*opt
1613 = (IMAGE_OPTIONAL_HEADER64
*) &(nt_header
->OptionalHeader
);
1614 data_dir
= opt
->DataDirectory
;
1615 *is_gui_app
= (opt
->Subsystem
== IMAGE_SUBSYSTEM_WINDOWS_GUI
);
1620 /* Look for Cygwin DLL in the DLL import list. */
1621 IMAGE_DATA_DIRECTORY import_dir
=
1622 data_dir
[IMAGE_DIRECTORY_ENTRY_IMPORT
];
1623 IMAGE_IMPORT_DESCRIPTOR
* imports
=
1624 RVA_TO_PTR (import_dir
.VirtualAddress
,
1625 rva_to_section (import_dir
.VirtualAddress
,
1629 for ( ; imports
->Name
; imports
++)
1631 IMAGE_SECTION_HEADER
* section
=
1632 rva_to_section (imports
->Name
, nt_header
);
1633 char * dllname
= RVA_TO_PTR (imports
->Name
, section
,
1636 /* The exact name of the Cygwin DLL has changed with
1637 various releases, but hopefully this will be
1638 reasonably future-proof. */
1639 if (strncmp (dllname
, "cygwin", 6) == 0)
1641 *is_cygnus_app
= TRUE
;
1644 else if (strncmp (dllname
, "msys-", 5) == 0)
1646 /* This catches both MSYS 1.x and MSYS2
1647 executables (the DLL name is msys-1.0.dll and
1648 msys-2.0.dll, respectively). There doesn't
1649 seem to be a reason to distinguish between
1650 the two, for now. */
1651 *is_msys_app
= TRUE
;
1660 close_file_data (&executable
);
1665 compare_env (const void *strp1
, const void *strp2
)
1667 const char *str1
= *(const char **)strp1
, *str2
= *(const char **)strp2
;
1669 while (*str1
&& *str2
&& *str1
!= '=' && *str2
!= '=')
1671 /* Sort order in command.com/cmd.exe is based on uppercasing
1672 names, so do the same here. */
1673 if (toupper (*str1
) > toupper (*str2
))
1675 else if (toupper (*str1
) < toupper (*str2
))
1680 if (*str1
== '=' && *str2
== '=')
1682 else if (*str1
== '=')
1689 merge_and_sort_env (char **envp1
, char **envp2
, char **new_envp
)
1691 char **optr
, **nptr
;
1703 num
+= optr
- envp2
;
1705 qsort (new_envp
, num
, sizeof (char *), compare_env
);
1710 /* When a new child process is created we need to register it in our list,
1711 so intercept spawn requests. */
1713 sys_spawnve (int mode
, char *cmdname
, char **argv
, char **envp
)
1715 Lisp_Object program
, full
;
1716 char *cmdline
, *env
, *parg
, **targ
;
1720 int is_dos_app
, is_cygnus_app
, is_msys_app
, is_gui_app
;
1722 /* We pass our process ID to our children by setting up an environment
1723 variable in their environment. */
1724 char ppid_env_var_buffer
[64];
1725 char *extra_env
[] = {ppid_env_var_buffer
, NULL
};
1726 /* These are the characters that cause an argument to need quoting.
1727 Arguments with whitespace characters need quoting to prevent the
1728 argument being split into two or more. Arguments with wildcards
1729 are also quoted, for consistency with posix platforms, where wildcards
1730 are not expanded if we run the program directly without a shell.
1731 Some extra whitespace characters need quoting in Cygwin/MSYS programs,
1732 so this list is conditionally modified below. */
1733 char *sepchars
= " \t*?";
1734 /* This is for native w32 apps; modified below for Cygwin/MSUS apps. */
1735 char escape_char
= '\\';
1736 char cmdname_a
[MAX_PATH
];
1738 /* We don't care about the other modes */
1739 if (mode
!= _P_NOWAIT
)
1745 /* Handle executable names without an executable suffix. The caller
1746 already searched exec-path and verified the file is executable,
1747 but start-process doesn't do that for file names that are already
1748 absolute. So we double-check this here, just in case. */
1749 if (faccessat (AT_FDCWD
, cmdname
, X_OK
, AT_EACCESS
) != 0)
1751 struct gcpro gcpro1
;
1753 program
= build_string (cmdname
);
1756 openp (Vexec_path
, program
, Vexec_suffixes
, &full
, make_number (X_OK
), 0);
1763 program
= ENCODE_FILE (full
);
1764 cmdname
= SDATA (program
);
1768 char *p
= alloca (strlen (cmdname
) + 1);
1770 /* Don't change the command name we were passed by our caller
1771 (unixtodos_filename below will destructively mirror forward
1773 cmdname
= strcpy (p
, cmdname
);
1776 /* make sure argv[0] and cmdname are both in DOS format */
1777 unixtodos_filename (cmdname
);
1778 /* argv[0] was encoded by caller using ENCODE_FILE, so it is in
1779 UTF-8. All the other arguments are encoded by ENCODE_SYSTEM or
1780 some such, and are in some ANSI codepage. We need to have
1781 argv[0] encoded in ANSI codepage. */
1782 filename_to_ansi (cmdname
, cmdname_a
);
1783 /* We explicitly require that the command's file name be encodable
1784 in the current ANSI codepage, because we will be invoking it via
1786 if (_mbspbrk (cmdname_a
, "?"))
1791 /* From here on, CMDNAME is an ANSI-encoded string. */
1792 cmdname
= cmdname_a
;
1795 /* Determine whether program is a 16-bit DOS executable, or a 32-bit
1796 Windows executable that is implicitly linked to the Cygnus or
1797 MSYS dll (implying it was compiled with the Cygnus/MSYS GNU
1798 toolchain and hence relies on cygwin.dll or MSYS DLL to parse the
1799 command line - we use this to decide how to escape quote chars in
1800 command line args that must be quoted).
1802 Also determine whether it is a GUI app, so that we don't hide its
1803 initial window unless specifically requested. */
1804 w32_executable_type (cmdname
, &is_dos_app
, &is_cygnus_app
, &is_msys_app
,
1807 /* On Windows 95, if cmdname is a DOS app, we invoke a helper
1808 application to start it by specifying the helper app as cmdname,
1809 while leaving the real app name as argv[0]. */
1814 cmdname
= alloca (MAX_PATH
);
1815 if (egetenv ("CMDPROXY"))
1816 strcpy (cmdname
, egetenv ("CMDPROXY"));
1819 char *q
= lispstpcpy (cmdname
, Vexec_directory
);
1820 /* If we are run from the source tree, use cmdproxy.exe from
1821 the same source tree. */
1822 for (p
= q
- 2; p
> cmdname
; p
--)
1825 if (*p
== '/' && xstrcasecmp (p
, "/lib-src/") == 0)
1826 q
= stpcpy (p
, "/nt/");
1827 strcpy (q
, "cmdproxy.exe");
1830 /* Can't use unixtodos_filename here, since that needs its file
1831 name argument encoded in UTF-8. */
1832 for (p
= cmdname
; *p
; p
= CharNextA (p
))
1837 /* we have to do some conjuring here to put argv and envp into the
1838 form CreateProcess wants... argv needs to be a space separated/null
1839 terminated list of parameters, and envp is a null
1840 separated/double-null terminated list of parameters.
1842 Additionally, zero-length args and args containing whitespace or
1843 quote chars need to be wrapped in double quotes - for this to work,
1844 embedded quotes need to be escaped as well. The aim is to ensure
1845 the child process reconstructs the argv array we start with
1846 exactly, so we treat quotes at the beginning and end of arguments
1849 The w32 GNU-based library from Cygnus doubles quotes to escape
1850 them, while MSVC uses backslash for escaping. (Actually the MSVC
1851 startup code does attempt to recognize doubled quotes and accept
1852 them, but gets it wrong and ends up requiring three quotes to get a
1853 single embedded quote!) So by default we decide whether to use
1854 quote or backslash as the escape character based on whether the
1855 binary is apparently a Cygnus compiled app.
1857 Note that using backslash to escape embedded quotes requires
1858 additional special handling if an embedded quote is already
1859 preceded by backslash, or if an arg requiring quoting ends with
1860 backslash. In such cases, the run of escape characters needs to be
1861 doubled. For consistency, we apply this special handling as long
1862 as the escape character is not quote.
1864 Since we have no idea how large argv and envp are likely to be we
1865 figure out list lengths on the fly and allocate them. */
1867 if (!NILP (Vw32_quote_process_args
))
1870 /* Override escape char by binding w32-quote-process-args to
1871 desired character, or use t for auto-selection. */
1872 if (INTEGERP (Vw32_quote_process_args
))
1873 escape_char
= XINT (Vw32_quote_process_args
);
1875 escape_char
= (is_cygnus_app
|| is_msys_app
) ? '"' : '\\';
1878 /* Cygwin/MSYS apps need quoting a bit more often. */
1879 if (escape_char
== '"')
1880 sepchars
= "\r\n\t\f '";
1888 int need_quotes
= 0;
1889 int escape_char_run
= 0;
1895 if (escape_char
== '"' && *p
== '\\')
1896 /* If it's a Cygwin/MSYS app, \ needs to be escaped. */
1900 /* allow for embedded quotes to be escaped */
1903 /* handle the case where the embedded quote is already escaped */
1904 if (escape_char_run
> 0)
1906 /* To preserve the arg exactly, we need to double the
1907 preceding escape characters (plus adding one to
1908 escape the quote character itself). */
1909 arglen
+= escape_char_run
;
1912 else if (strchr (sepchars
, *p
) != NULL
)
1917 if (*p
== escape_char
&& escape_char
!= '"')
1920 escape_char_run
= 0;
1925 /* handle the case where the arg ends with an escape char - we
1926 must not let the enclosing quote be escaped. */
1927 if (escape_char_run
> 0)
1928 arglen
+= escape_char_run
;
1930 arglen
+= strlen (*targ
++) + 1;
1932 cmdline
= alloca (arglen
);
1938 int need_quotes
= 0;
1946 if ((strchr (sepchars
, *p
) != NULL
) || *p
== '"')
1951 int escape_char_run
= 0;
1957 /* last = p + strlen (p) - 1; */
1960 /* This version does not escape quotes if they occur at the
1961 beginning or end of the arg - this could lead to incorrect
1962 behavior when the arg itself represents a command line
1963 containing quoted args. I believe this was originally done
1964 as a hack to make some things work, before
1965 `w32-quote-process-args' was added. */
1968 if (*p
== '"' && p
> first
&& p
< last
)
1969 *parg
++ = escape_char
; /* escape embedded quotes */
1977 /* double preceding escape chars if any */
1978 while (escape_char_run
> 0)
1980 *parg
++ = escape_char
;
1983 /* escape all quote chars, even at beginning or end */
1984 *parg
++ = escape_char
;
1986 else if (escape_char
== '"' && *p
== '\\')
1990 if (*p
== escape_char
&& escape_char
!= '"')
1993 escape_char_run
= 0;
1995 /* double escape chars before enclosing quote */
1996 while (escape_char_run
> 0)
1998 *parg
++ = escape_char
;
2006 strcpy (parg
, *targ
);
2007 parg
+= strlen (*targ
);
2017 numenv
= 1; /* for end null */
2020 arglen
+= strlen (*targ
++) + 1;
2023 /* extra env vars... */
2024 sprintf (ppid_env_var_buffer
, "EM_PARENT_PROCESS_ID=%lu",
2025 GetCurrentProcessId ());
2026 arglen
+= strlen (ppid_env_var_buffer
) + 1;
2029 /* merge env passed in and extra env into one, and sort it. */
2030 targ
= (char **) alloca (numenv
* sizeof (char *));
2031 merge_and_sort_env (envp
, extra_env
, targ
);
2033 /* concatenate env entries. */
2034 env
= alloca (arglen
);
2038 strcpy (parg
, *targ
);
2039 parg
+= strlen (*targ
++);
2052 /* Now create the process. */
2053 if (!create_child (cmdname
, cmdline
, env
, is_gui_app
, &pid
, cp
))
2063 /* Emulate the select call
2064 Wait for available input on any of the given rfds, or timeout if
2065 a timeout is given and no input is detected
2066 wfds and efds are not supported and must be NULL.
2068 For simplicity, we detect the death of child processes here and
2069 synchronously call the SIGCHLD handler. Since it is possible for
2070 children to be created without a corresponding pipe handle from which
2071 to read output, we wait separately on the process handles as well as
2072 the char_avail events for each process pipe. We only call
2073 wait/reap_process when the process actually terminates.
2075 To reduce the number of places in which Emacs can be hung such that
2076 C-g is not able to interrupt it, we always wait on interrupt_handle
2077 (which is signaled by the input thread when C-g is detected). If we
2078 detect that we were woken up by C-g, we return -1 with errno set to
2079 EINTR as on Unix. */
2081 /* From w32console.c */
2082 extern HANDLE keyboard_handle
;
2084 /* From w32xfns.c */
2085 extern HANDLE interrupt_handle
;
2087 /* From process.c */
2088 extern int proc_buffered_char
[];
2091 sys_select (int nfds
, SELECT_TYPE
*rfds
, SELECT_TYPE
*wfds
, SELECT_TYPE
*efds
,
2092 struct timespec
*timeout
, void *ignored
)
2094 SELECT_TYPE orfds
, owfds
;
2095 DWORD timeout_ms
, start_time
;
2098 child_process
*cp
, *cps
[MAX_CHILDREN
];
2099 HANDLE wait_hnd
[MAXDESC
+ MAX_CHILDREN
];
2100 int fdindex
[MAXDESC
]; /* mapping from wait handles back to descriptors */
2103 timeout
? (timeout
->tv_sec
* 1000 + timeout
->tv_nsec
/ 1000000) : INFINITE
;
2105 /* If the descriptor sets are NULL but timeout isn't, then just Sleep. */
2106 if (rfds
== NULL
&& wfds
== NULL
&& efds
== NULL
&& timeout
!= NULL
)
2112 /* Otherwise, we only handle rfds and wfds, so fail otherwise. */
2113 if ((rfds
== NULL
&& wfds
== NULL
) || efds
!= NULL
)
2135 /* If interrupt_handle is available and valid, always wait on it, to
2136 detect C-g (quit). */
2138 if (interrupt_handle
&& interrupt_handle
!= INVALID_HANDLE_VALUE
)
2140 wait_hnd
[0] = interrupt_handle
;
2145 /* Build a list of pipe handles to wait on. */
2146 for (i
= 0; i
< nfds
; i
++)
2147 if (FD_ISSET (i
, &orfds
) || FD_ISSET (i
, &owfds
))
2151 if (keyboard_handle
)
2153 /* Handle stdin specially */
2154 wait_hnd
[nh
] = keyboard_handle
;
2159 /* Check for any emacs-generated input in the queue since
2160 it won't be detected in the wait */
2161 if (rfds
&& detect_input_pending ())
2166 else if (noninteractive
)
2168 if (handle_file_notifications (NULL
))
2174 /* Child process and socket/comm port input. */
2176 if (FD_ISSET (i
, &owfds
)
2178 && (fd_info
[i
].flags
&& FILE_CONNECT
) == 0)
2180 DebPrint (("sys_select: fd %d is in wfds, but FILE_CONNECT is reset!\n", i
));
2185 int current_status
= cp
->status
;
2187 if (current_status
== STATUS_READ_ACKNOWLEDGED
)
2189 /* Tell reader thread which file handle to use. */
2191 /* Zero out the error code. */
2193 /* Wake up the reader thread for this process */
2194 cp
->status
= STATUS_READ_READY
;
2195 if (!SetEvent (cp
->char_consumed
))
2196 DebPrint (("sys_select.SetEvent failed with "
2197 "%lu for fd %ld\n", GetLastError (), i
));
2200 #ifdef CHECK_INTERLOCK
2201 /* slightly crude cross-checking of interlock between threads */
2203 current_status
= cp
->status
;
2204 if (WaitForSingleObject (cp
->char_avail
, 0) == WAIT_OBJECT_0
)
2206 /* char_avail has been signaled, so status (which may
2207 have changed) should indicate read has completed
2208 but has not been acknowledged. */
2209 current_status
= cp
->status
;
2210 if (current_status
!= STATUS_READ_SUCCEEDED
2211 && current_status
!= STATUS_READ_FAILED
)
2212 DebPrint (("char_avail set, but read not completed: status %d\n",
2217 /* char_avail has not been signaled, so status should
2218 indicate that read is in progress; small possibility
2219 that read has completed but event wasn't yet signaled
2220 when we tested it (because a context switch occurred
2221 or if running on separate CPUs). */
2222 if (current_status
!= STATUS_READ_READY
2223 && current_status
!= STATUS_READ_IN_PROGRESS
2224 && current_status
!= STATUS_READ_SUCCEEDED
2225 && current_status
!= STATUS_READ_FAILED
)
2226 DebPrint (("char_avail reset, but read status is bad: %d\n",
2230 wait_hnd
[nh
] = cp
->char_avail
;
2232 if (!wait_hnd
[nh
]) emacs_abort ();
2235 DebPrint (("select waiting on child %d fd %d\n",
2236 cp
-child_procs
, i
));
2241 /* Unable to find something to wait on for this fd, skip */
2243 /* Note that this is not a fatal error, and can in fact
2244 happen in unusual circumstances. Specifically, if
2245 sys_spawnve fails, eg. because the program doesn't
2246 exist, and debug-on-error is t so Fsignal invokes a
2247 nested input loop, then the process output pipe is
2248 still included in input_wait_mask with no child_proc
2249 associated with it. (It is removed when the debugger
2250 exits the nested input loop and the error is thrown.) */
2252 DebPrint (("sys_select: fd %ld is invalid! ignoring\n", i
));
2258 /* Add handles of child processes. */
2260 for (cp
= child_procs
+ (child_proc_count
-1); cp
>= child_procs
; cp
--)
2261 /* Some child_procs might be sockets; ignore them. Also some
2262 children may have died already, but we haven't finished reading
2263 the process output; ignore them too. */
2264 if ((CHILD_ACTIVE (cp
) && cp
->procinfo
.hProcess
)
2266 || (fd_info
[cp
->fd
].flags
& FILE_SEND_SIGCHLD
) == 0
2267 || (fd_info
[cp
->fd
].flags
& FILE_AT_EOF
) != 0)
2270 wait_hnd
[nh
+ nc
] = cp
->procinfo
.hProcess
;
2275 /* Nothing to look for, so we didn't find anything */
2282 if (handle_file_notifications (NULL
))
2288 start_time
= GetTickCount ();
2290 /* Wait for input or child death to be signaled. If user input is
2291 allowed, then also accept window messages. */
2292 if (FD_ISSET (0, &orfds
))
2293 active
= MsgWaitForMultipleObjects (nh
+ nc
, wait_hnd
, FALSE
, timeout_ms
,
2296 active
= WaitForMultipleObjects (nh
+ nc
, wait_hnd
, FALSE
, timeout_ms
);
2298 if (active
== WAIT_FAILED
)
2300 DebPrint (("select.WaitForMultipleObjects (%d, %lu) failed with %lu\n",
2301 nh
+ nc
, timeout_ms
, GetLastError ()));
2302 /* don't return EBADF - this causes wait_reading_process_output to
2303 abort; WAIT_FAILED is returned when single-stepping under
2304 Windows 95 after switching thread focus in debugger, and
2305 possibly at other times. */
2309 else if (active
== WAIT_TIMEOUT
)
2313 if (handle_file_notifications (NULL
))
2318 else if (active
>= WAIT_OBJECT_0
2319 && active
< WAIT_OBJECT_0
+MAXIMUM_WAIT_OBJECTS
)
2321 active
-= WAIT_OBJECT_0
;
2323 else if (active
>= WAIT_ABANDONED_0
2324 && active
< WAIT_ABANDONED_0
+MAXIMUM_WAIT_OBJECTS
)
2326 active
-= WAIT_ABANDONED_0
;
2331 /* Loop over all handles after active (now officially documented as
2332 being the first signaled handle in the array). We do this to
2333 ensure fairness, so that all channels with data available will be
2334 processed - otherwise higher numbered channels could be starved. */
2337 if (active
== nh
+ nc
)
2339 /* There are messages in the lisp thread's queue; we must
2340 drain the queue now to ensure they are processed promptly,
2341 because if we don't do so, we will not be woken again until
2342 further messages arrive.
2344 NB. If ever we allow window message procedures to callback
2345 into lisp, we will need to ensure messages are dispatched
2346 at a safe time for lisp code to be run (*), and we may also
2347 want to provide some hooks in the dispatch loop to cater
2348 for modeless dialogs created by lisp (ie. to register
2349 window handles to pass to IsDialogMessage).
2351 (*) Note that MsgWaitForMultipleObjects above is an
2352 internal dispatch point for messages that are sent to
2353 windows created by this thread. */
2354 if (drain_message_queue ()
2355 /* If drain_message_queue returns non-zero, that means
2356 we received a WM_EMACS_FILENOTIFY message. If this
2357 is a TTY frame, we must signal the caller that keyboard
2358 input is available, so that w32_console_read_socket
2359 will be called to pick up the notifications. If we
2360 don't do that, file notifications will only work when
2361 the Emacs TTY frame has focus. */
2362 && FRAME_TERMCAP_P (SELECTED_FRAME ())
2363 /* they asked for stdin reads */
2364 && FD_ISSET (0, &orfds
)
2365 /* the stdin handle is valid */
2373 else if (active
>= nh
)
2375 cp
= cps
[active
- nh
];
2377 /* We cannot always signal SIGCHLD immediately; if we have not
2378 finished reading the process output, we must delay sending
2379 SIGCHLD until we do. */
2381 if (cp
->fd
>= 0 && (fd_info
[cp
->fd
].flags
& FILE_AT_EOF
) == 0)
2382 fd_info
[cp
->fd
].flags
|= FILE_SEND_SIGCHLD
;
2383 /* SIG_DFL for SIGCHLD is ignored */
2384 else if (sig_handlers
[SIGCHLD
] != SIG_DFL
&&
2385 sig_handlers
[SIGCHLD
] != SIG_IGN
)
2388 DebPrint (("select calling SIGCHLD handler for pid %d\n",
2391 sig_handlers
[SIGCHLD
] (SIGCHLD
);
2394 else if (fdindex
[active
] == -1)
2396 /* Quit (C-g) was detected. */
2400 else if (rfds
&& fdindex
[active
] == 0)
2402 /* Keyboard input available */
2408 /* Must be a socket or pipe - read ahead should have
2409 completed, either succeeding or failing. If this handle
2410 was waiting for an async 'connect', reset the connect
2411 flag, so it could read from now on. */
2412 if (wfds
&& (fd_info
[fdindex
[active
]].flags
& FILE_CONNECT
) != 0)
2414 cp
= fd_info
[fdindex
[active
]].cp
;
2417 /* Don't reset the FILE_CONNECT bit and don't
2418 acknowledge the read if the status is
2419 STATUS_CONNECT_FAILED or some other
2420 failure. That's because the thread exits in those
2421 cases, so it doesn't need the ACK, and we want to
2422 keep the FILE_CONNECT bit as evidence that the
2423 connect failed, to be checked in sys_read. */
2424 if (cp
->status
== STATUS_READ_SUCCEEDED
)
2426 fd_info
[cp
->fd
].flags
&= ~FILE_CONNECT
;
2427 cp
->status
= STATUS_READ_ACKNOWLEDGED
;
2429 ResetEvent (cp
->char_avail
);
2431 FD_SET (fdindex
[active
], wfds
);
2434 FD_SET (fdindex
[active
], rfds
);
2438 /* Even though wait_reading_process_output only reads from at most
2439 one channel, we must process all channels here so that we reap
2440 all children that have died. */
2441 while (++active
< nh
+ nc
)
2442 if (WaitForSingleObject (wait_hnd
[active
], 0) == WAIT_OBJECT_0
)
2444 } while (active
< nh
+ nc
);
2448 if (handle_file_notifications (NULL
))
2452 /* If no input has arrived and timeout hasn't expired, wait again. */
2455 DWORD elapsed
= GetTickCount () - start_time
;
2457 if (timeout_ms
> elapsed
) /* INFINITE is MAX_UINT */
2459 if (timeout_ms
!= INFINITE
)
2460 timeout_ms
-= elapsed
;
2461 goto count_children
;
2468 /* Substitute for certain kill () operations */
2470 static BOOL CALLBACK
2471 find_child_console (HWND hwnd
, LPARAM arg
)
2473 child_process
* cp
= (child_process
*) arg
;
2476 GetWindowThreadProcessId (hwnd
, &process_id
);
2477 if (process_id
== cp
->procinfo
.dwProcessId
)
2479 char window_class
[32];
2481 GetClassName (hwnd
, window_class
, sizeof (window_class
));
2482 if (strcmp (window_class
,
2483 (os_subtype
== OS_9X
)
2485 : "ConsoleWindowClass") == 0)
2495 /* Emulate 'kill', but only for other processes. */
2497 sys_kill (pid_t pid
, int sig
)
2501 int need_to_free
= 0;
2504 /* Each process is in its own process group. */
2508 /* Only handle signals that will result in the process dying */
2510 && sig
!= SIGINT
&& sig
!= SIGKILL
&& sig
!= SIGQUIT
&& sig
!= SIGHUP
)
2518 /* It will take _some_ time before PID 4 or less on Windows will
2525 proc_hand
= OpenProcess (PROCESS_QUERY_INFORMATION
, 0, pid
);
2526 if (proc_hand
== NULL
)
2528 DWORD err
= GetLastError ();
2532 case ERROR_ACCESS_DENIED
: /* existing process, but access denied */
2535 case ERROR_INVALID_PARAMETER
: /* process PID does not exist */
2541 CloseHandle (proc_hand
);
2545 cp
= find_child_pid (pid
);
2548 /* We were passed a PID of something other than our subprocess.
2549 If that is our own PID, we will send to ourself a message to
2550 close the selected frame, which does not necessarily
2551 terminates Emacs. But then we are not supposed to call
2552 sys_kill with our own PID. */
2553 proc_hand
= OpenProcess (PROCESS_TERMINATE
, 0, pid
);
2554 if (proc_hand
== NULL
)
2563 proc_hand
= cp
->procinfo
.hProcess
;
2564 pid
= cp
->procinfo
.dwProcessId
;
2566 /* Try to locate console window for process. */
2567 EnumWindows (find_child_console
, (LPARAM
) cp
);
2570 if (sig
== SIGINT
|| sig
== SIGQUIT
)
2572 if (NILP (Vw32_start_process_share_console
) && cp
&& cp
->hwnd
)
2574 BYTE control_scan_code
= (BYTE
) MapVirtualKey (VK_CONTROL
, 0);
2575 /* Fake Ctrl-C for SIGINT, and Ctrl-Break for SIGQUIT. */
2576 BYTE vk_break_code
= (sig
== SIGINT
) ? 'C' : VK_CANCEL
;
2577 BYTE break_scan_code
= (BYTE
) MapVirtualKey (vk_break_code
, 0);
2578 HWND foreground_window
;
2580 if (break_scan_code
== 0)
2582 /* Fake Ctrl-C for SIGQUIT if we can't manage Ctrl-Break. */
2583 vk_break_code
= 'C';
2584 break_scan_code
= (BYTE
) MapVirtualKey (vk_break_code
, 0);
2587 foreground_window
= GetForegroundWindow ();
2588 if (foreground_window
)
2590 /* NT 5.0, and apparently also Windows 98, will not allow
2591 a Window to be set to foreground directly without the
2592 user's involvement. The workaround is to attach
2593 ourselves to the thread that owns the foreground
2594 window, since that is the only thread that can set the
2595 foreground window. */
2596 DWORD foreground_thread
, child_thread
;
2598 GetWindowThreadProcessId (foreground_window
, NULL
);
2599 if (foreground_thread
== GetCurrentThreadId ()
2600 || !AttachThreadInput (GetCurrentThreadId (),
2601 foreground_thread
, TRUE
))
2602 foreground_thread
= 0;
2604 child_thread
= GetWindowThreadProcessId (cp
->hwnd
, NULL
);
2605 if (child_thread
== GetCurrentThreadId ()
2606 || !AttachThreadInput (GetCurrentThreadId (),
2607 child_thread
, TRUE
))
2610 /* Set the foreground window to the child. */
2611 if (SetForegroundWindow (cp
->hwnd
))
2613 /* Generate keystrokes as if user had typed Ctrl-Break or
2615 keybd_event (VK_CONTROL
, control_scan_code
, 0, 0);
2616 keybd_event (vk_break_code
, break_scan_code
,
2617 (vk_break_code
== 'C' ? 0 : KEYEVENTF_EXTENDEDKEY
), 0);
2618 keybd_event (vk_break_code
, break_scan_code
,
2619 (vk_break_code
== 'C' ? 0 : KEYEVENTF_EXTENDEDKEY
)
2620 | KEYEVENTF_KEYUP
, 0);
2621 keybd_event (VK_CONTROL
, control_scan_code
,
2622 KEYEVENTF_KEYUP
, 0);
2624 /* Sleep for a bit to give time for Emacs frame to respond
2625 to focus change events (if Emacs was active app). */
2628 SetForegroundWindow (foreground_window
);
2630 /* Detach from the foreground and child threads now that
2631 the foreground switching is over. */
2632 if (foreground_thread
)
2633 AttachThreadInput (GetCurrentThreadId (),
2634 foreground_thread
, FALSE
);
2636 AttachThreadInput (GetCurrentThreadId (),
2637 child_thread
, FALSE
);
2640 /* Ctrl-Break is NT equivalent of SIGINT. */
2641 else if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT
, pid
))
2643 DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d "
2644 "for pid %lu\n", GetLastError (), pid
));
2651 if (NILP (Vw32_start_process_share_console
) && cp
&& cp
->hwnd
)
2654 if (os_subtype
== OS_9X
)
2657 Another possibility is to try terminating the VDM out-right by
2658 calling the Shell VxD (id 0x17) V86 interface, function #4
2659 "SHELL_Destroy_VM", ie.
2665 First need to determine the current VM handle, and then arrange for
2666 the shellapi call to be made from the system vm (by using
2667 Switch_VM_and_callback).
2669 Could try to invoke DestroyVM through CallVxD.
2673 /* On Windows 95, posting WM_QUIT causes the 16-bit subsystem
2674 to hang when cmdproxy is used in conjunction with
2675 command.com for an interactive shell. Posting
2676 WM_CLOSE pops up a dialog that, when Yes is selected,
2677 does the same thing. TerminateProcess is also less
2678 than ideal in that subprocesses tend to stick around
2679 until the machine is shutdown, but at least it
2680 doesn't freeze the 16-bit subsystem. */
2681 PostMessage (cp
->hwnd
, WM_QUIT
, 0xff, 0);
2683 if (!TerminateProcess (proc_hand
, 0xff))
2685 DebPrint (("sys_kill.TerminateProcess returned %d "
2686 "for pid %lu\n", GetLastError (), pid
));
2693 PostMessage (cp
->hwnd
, WM_CLOSE
, 0, 0);
2695 /* Kill the process. On W32 this doesn't kill child processes
2696 so it doesn't work very well for shells which is why it's not
2697 used in every case. */
2698 else if (!TerminateProcess (proc_hand
, 0xff))
2700 DebPrint (("sys_kill.TerminateProcess returned %d "
2701 "for pid %lu\n", GetLastError (), pid
));
2708 CloseHandle (proc_hand
);
2713 /* The following two routines are used to manipulate stdin, stdout, and
2714 stderr of our child processes.
2716 Assuming that in, out, and err are *not* inheritable, we make them
2717 stdin, stdout, and stderr of the child as follows:
2719 - Save the parent's current standard handles.
2720 - Set the std handles to inheritable duplicates of the ones being passed in.
2721 (Note that _get_osfhandle() is an io.h procedure that retrieves the
2722 NT file handle for a crt file descriptor.)
2723 - Spawn the child, which inherits in, out, and err as stdin,
2724 stdout, and stderr. (see Spawnve)
2725 - Close the std handles passed to the child.
2726 - Reset the parent's standard handles to the saved handles.
2727 (see reset_standard_handles)
2728 We assume that the caller closes in, out, and err after calling us. */
2731 prepare_standard_handles (int in
, int out
, int err
, HANDLE handles
[3])
2734 HANDLE newstdin
, newstdout
, newstderr
;
2736 parent
= GetCurrentProcess ();
2738 handles
[0] = GetStdHandle (STD_INPUT_HANDLE
);
2739 handles
[1] = GetStdHandle (STD_OUTPUT_HANDLE
);
2740 handles
[2] = GetStdHandle (STD_ERROR_HANDLE
);
2742 /* make inheritable copies of the new handles */
2743 if (!DuplicateHandle (parent
,
2744 (HANDLE
) _get_osfhandle (in
),
2749 DUPLICATE_SAME_ACCESS
))
2750 report_file_error ("Duplicating input handle for child", Qnil
);
2752 if (!DuplicateHandle (parent
,
2753 (HANDLE
) _get_osfhandle (out
),
2758 DUPLICATE_SAME_ACCESS
))
2759 report_file_error ("Duplicating output handle for child", Qnil
);
2761 if (!DuplicateHandle (parent
,
2762 (HANDLE
) _get_osfhandle (err
),
2767 DUPLICATE_SAME_ACCESS
))
2768 report_file_error ("Duplicating error handle for child", Qnil
);
2770 /* and store them as our std handles */
2771 if (!SetStdHandle (STD_INPUT_HANDLE
, newstdin
))
2772 report_file_error ("Changing stdin handle", Qnil
);
2774 if (!SetStdHandle (STD_OUTPUT_HANDLE
, newstdout
))
2775 report_file_error ("Changing stdout handle", Qnil
);
2777 if (!SetStdHandle (STD_ERROR_HANDLE
, newstderr
))
2778 report_file_error ("Changing stderr handle", Qnil
);
2782 reset_standard_handles (int in
, int out
, int err
, HANDLE handles
[3])
2784 /* close the duplicated handles passed to the child */
2785 CloseHandle (GetStdHandle (STD_INPUT_HANDLE
));
2786 CloseHandle (GetStdHandle (STD_OUTPUT_HANDLE
));
2787 CloseHandle (GetStdHandle (STD_ERROR_HANDLE
));
2789 /* now restore parent's saved std handles */
2790 SetStdHandle (STD_INPUT_HANDLE
, handles
[0]);
2791 SetStdHandle (STD_OUTPUT_HANDLE
, handles
[1]);
2792 SetStdHandle (STD_ERROR_HANDLE
, handles
[2]);
2796 set_process_dir (char * dir
)
2801 /* To avoid problems with winsock implementations that work over dial-up
2802 connections causing or requiring a connection to exist while Emacs is
2803 running, Emacs no longer automatically loads winsock on startup if it
2804 is present. Instead, it will be loaded when open-network-stream is
2807 To allow full control over when winsock is loaded, we provide these
2808 two functions to dynamically load and unload winsock. This allows
2809 dial-up users to only be connected when they actually need to use
2813 extern HANDLE winsock_lib
;
2814 extern BOOL
term_winsock (void);
2815 extern BOOL
init_winsock (int load_now
);
2817 DEFUN ("w32-has-winsock", Fw32_has_winsock
, Sw32_has_winsock
, 0, 1, 0,
2818 doc
: /* Test for presence of the Windows socket library `winsock'.
2819 Returns non-nil if winsock support is present, nil otherwise.
2821 If the optional argument LOAD-NOW is non-nil, the winsock library is
2822 also loaded immediately if not already loaded. If winsock is loaded,
2823 the winsock local hostname is returned (since this may be different from
2824 the value of `system-name' and should supplant it), otherwise t is
2825 returned to indicate winsock support is present. */)
2826 (Lisp_Object load_now
)
2830 have_winsock
= init_winsock (!NILP (load_now
));
2833 if (winsock_lib
!= NULL
)
2835 /* Return new value for system-name. The best way to do this
2836 is to call init_system_name, saving and restoring the
2837 original value to avoid side-effects. */
2838 Lisp_Object orig_hostname
= Vsystem_name
;
2839 Lisp_Object hostname
;
2841 init_system_name ();
2842 hostname
= Vsystem_name
;
2843 Vsystem_name
= orig_hostname
;
2851 DEFUN ("w32-unload-winsock", Fw32_unload_winsock
, Sw32_unload_winsock
,
2853 doc
: /* Unload the Windows socket library `winsock' if loaded.
2854 This is provided to allow dial-up socket connections to be disconnected
2855 when no longer needed. Returns nil without unloading winsock if any
2856 socket connections still exist. */)
2859 return term_winsock () ? Qt
: Qnil
;
2863 /* Some miscellaneous functions that are Windows specific, but not GUI
2864 specific (ie. are applicable in terminal or batch mode as well). */
2866 DEFUN ("w32-short-file-name", Fw32_short_file_name
, Sw32_short_file_name
, 1, 1, 0,
2867 doc
: /* Return the short file name version (8.3) of the full path of FILENAME.
2868 If FILENAME does not exist, return nil.
2869 All path elements in FILENAME are converted to their short names. */)
2870 (Lisp_Object filename
)
2872 char shortname
[MAX_PATH
];
2874 CHECK_STRING (filename
);
2876 /* first expand it. */
2877 filename
= Fexpand_file_name (filename
, Qnil
);
2879 /* luckily, this returns the short version of each element in the path. */
2880 if (w32_get_short_filename (SDATA (ENCODE_FILE (filename
)),
2881 shortname
, MAX_PATH
) == 0)
2884 dostounix_filename (shortname
);
2886 /* No need to DECODE_FILE, because 8.3 names are pure ASCII. */
2887 return build_string (shortname
);
2891 DEFUN ("w32-long-file-name", Fw32_long_file_name
, Sw32_long_file_name
,
2893 doc
: /* Return the long file name version of the full path of FILENAME.
2894 If FILENAME does not exist, return nil.
2895 All path elements in FILENAME are converted to their long names. */)
2896 (Lisp_Object filename
)
2898 char longname
[ MAX_UTF8_PATH
];
2901 CHECK_STRING (filename
);
2903 if (SBYTES (filename
) == 2
2904 && *(SDATA (filename
) + 1) == ':')
2907 /* first expand it. */
2908 filename
= Fexpand_file_name (filename
, Qnil
);
2910 if (!w32_get_long_filename (SDATA (ENCODE_FILE (filename
)), longname
,
2914 dostounix_filename (longname
);
2916 /* If we were passed only a drive, make sure that a slash is not appended
2917 for consistency with directories. Allow for drive mapping via SUBST
2918 in case expand-file-name is ever changed to expand those. */
2919 if (drive_only
&& longname
[1] == ':' && longname
[2] == '/' && !longname
[3])
2922 return DECODE_FILE (build_unibyte_string (longname
));
2925 DEFUN ("w32-set-process-priority", Fw32_set_process_priority
,
2926 Sw32_set_process_priority
, 2, 2, 0,
2927 doc
: /* Set the priority of PROCESS to PRIORITY.
2928 If PROCESS is nil, the priority of Emacs is changed, otherwise the
2929 priority of the process whose pid is PROCESS is changed.
2930 PRIORITY should be one of the symbols high, normal, or low;
2931 any other symbol will be interpreted as normal.
2933 If successful, the return value is t, otherwise nil. */)
2934 (Lisp_Object process
, Lisp_Object priority
)
2936 HANDLE proc_handle
= GetCurrentProcess ();
2937 DWORD priority_class
= NORMAL_PRIORITY_CLASS
;
2938 Lisp_Object result
= Qnil
;
2940 CHECK_SYMBOL (priority
);
2942 if (!NILP (process
))
2947 CHECK_NUMBER (process
);
2949 /* Allow pid to be an internally generated one, or one obtained
2950 externally. This is necessary because real pids on Windows 95 are
2953 pid
= XINT (process
);
2954 cp
= find_child_pid (pid
);
2956 pid
= cp
->procinfo
.dwProcessId
;
2958 proc_handle
= OpenProcess (PROCESS_SET_INFORMATION
, FALSE
, pid
);
2961 if (EQ (priority
, Qhigh
))
2962 priority_class
= HIGH_PRIORITY_CLASS
;
2963 else if (EQ (priority
, Qlow
))
2964 priority_class
= IDLE_PRIORITY_CLASS
;
2966 if (proc_handle
!= NULL
)
2968 if (SetPriorityClass (proc_handle
, priority_class
))
2970 if (!NILP (process
))
2971 CloseHandle (proc_handle
);
2977 DEFUN ("w32-application-type", Fw32_application_type
,
2978 Sw32_application_type
, 1, 1, 0,
2979 doc
: /* Return the type of an MS-Windows PROGRAM.
2981 Knowing the type of an executable could be useful for formatting
2982 file names passed to it or for quoting its command-line arguments.
2984 PROGRAM should specify an executable file, including the extension.
2986 The value is one of the following:
2988 `dos' -- a DOS .com program or some other non-PE executable
2989 `cygwin' -- a Cygwin program that depends on Cygwin DLL
2990 `msys' -- an MSYS 1.x or MSYS2 program
2991 `w32-native' -- a native Windows application
2992 `unknown' -- a file that doesn't exist, or cannot be open, or whose
2993 name is not encodable in the current ANSI codepage.
2995 Note that for .bat and .cmd batch files the function returns the type
2996 of their command interpreter, as specified by the \"COMSPEC\"
2997 environment variable.
2999 This function returns `unknown' for programs whose file names
3000 include characters not supported by the current ANSI codepage, as
3001 such programs cannot be invoked by Emacs anyway. */)
3002 (Lisp_Object program
)
3004 int is_dos_app
, is_cygwin_app
, is_msys_app
, dummy
;
3005 Lisp_Object encoded_progname
;
3006 char *progname
, progname_a
[MAX_PATH
];
3008 program
= Fexpand_file_name (program
, Qnil
);
3009 encoded_progname
= ENCODE_FILE (program
);
3010 progname
= SDATA (encoded_progname
);
3011 unixtodos_filename (progname
);
3012 filename_to_ansi (progname
, progname_a
);
3013 /* Reject file names that cannot be encoded in the current ANSI
3015 if (_mbspbrk (progname_a
, "?"))
3018 if (w32_executable_type (progname_a
, &is_dos_app
, &is_cygwin_app
,
3019 &is_msys_app
, &dummy
) != 0)
3030 #ifdef HAVE_LANGINFO_CODESET
3031 /* Emulation of nl_langinfo. Used in fns.c:Flocale_info. */
3033 nl_langinfo (nl_item item
)
3035 /* Conversion of Posix item numbers to their Windows equivalents. */
3036 static const LCTYPE w32item
[] = {
3037 LOCALE_IDEFAULTANSICODEPAGE
,
3038 LOCALE_SDAYNAME1
, LOCALE_SDAYNAME2
, LOCALE_SDAYNAME3
,
3039 LOCALE_SDAYNAME4
, LOCALE_SDAYNAME5
, LOCALE_SDAYNAME6
, LOCALE_SDAYNAME7
,
3040 LOCALE_SMONTHNAME1
, LOCALE_SMONTHNAME2
, LOCALE_SMONTHNAME3
,
3041 LOCALE_SMONTHNAME4
, LOCALE_SMONTHNAME5
, LOCALE_SMONTHNAME6
,
3042 LOCALE_SMONTHNAME7
, LOCALE_SMONTHNAME8
, LOCALE_SMONTHNAME9
,
3043 LOCALE_SMONTHNAME10
, LOCALE_SMONTHNAME11
, LOCALE_SMONTHNAME12
3046 static char *nl_langinfo_buf
= NULL
;
3047 static int nl_langinfo_len
= 0;
3049 if (nl_langinfo_len
<= 0)
3050 nl_langinfo_buf
= xmalloc (nl_langinfo_len
= 1);
3052 if (item
< 0 || item
>= _NL_NUM
)
3053 nl_langinfo_buf
[0] = 0;
3056 LCID cloc
= GetThreadLocale ();
3057 int need_len
= GetLocaleInfo (cloc
, w32item
[item
] | LOCALE_USE_CP_ACP
,
3061 nl_langinfo_buf
[0] = 0;
3064 if (item
== CODESET
)
3066 need_len
+= 2; /* for the "cp" prefix */
3067 if (need_len
< 8) /* for the case we call GetACP */
3070 if (nl_langinfo_len
<= need_len
)
3071 nl_langinfo_buf
= xrealloc (nl_langinfo_buf
,
3072 nl_langinfo_len
= need_len
);
3073 if (!GetLocaleInfo (cloc
, w32item
[item
] | LOCALE_USE_CP_ACP
,
3074 nl_langinfo_buf
, nl_langinfo_len
))
3075 nl_langinfo_buf
[0] = 0;
3076 else if (item
== CODESET
)
3078 if (strcmp (nl_langinfo_buf
, "0") == 0 /* CP_ACP */
3079 || strcmp (nl_langinfo_buf
, "1") == 0) /* CP_OEMCP */
3080 sprintf (nl_langinfo_buf
, "cp%u", GetACP ());
3083 memmove (nl_langinfo_buf
+ 2, nl_langinfo_buf
,
3084 strlen (nl_langinfo_buf
) + 1);
3085 nl_langinfo_buf
[0] = 'c';
3086 nl_langinfo_buf
[1] = 'p';
3091 return nl_langinfo_buf
;
3093 #endif /* HAVE_LANGINFO_CODESET */
3095 DEFUN ("w32-get-locale-info", Fw32_get_locale_info
,
3096 Sw32_get_locale_info
, 1, 2, 0,
3097 doc
: /* Return information about the Windows locale LCID.
3098 By default, return a three letter locale code which encodes the default
3099 language as the first two characters, and the country or regional variant
3100 as the third letter. For example, ENU refers to `English (United States)',
3101 while ENC means `English (Canadian)'.
3103 If the optional argument LONGFORM is t, the long form of the locale
3104 name is returned, e.g. `English (United States)' instead; if LONGFORM
3105 is a number, it is interpreted as an LCTYPE constant and the corresponding
3106 locale information is returned.
3108 If LCID (a 16-bit number) is not a valid locale, the result is nil. */)
3109 (Lisp_Object lcid
, Lisp_Object longform
)
3113 char abbrev_name
[32] = { 0 };
3114 char full_name
[256] = { 0 };
3116 CHECK_NUMBER (lcid
);
3118 if (!IsValidLocale (XINT (lcid
), LCID_SUPPORTED
))
3121 if (NILP (longform
))
3123 got_abbrev
= GetLocaleInfo (XINT (lcid
),
3124 LOCALE_SABBREVLANGNAME
| LOCALE_USE_CP_ACP
,
3125 abbrev_name
, sizeof (abbrev_name
));
3127 return build_string (abbrev_name
);
3129 else if (EQ (longform
, Qt
))
3131 got_full
= GetLocaleInfo (XINT (lcid
),
3132 LOCALE_SLANGUAGE
| LOCALE_USE_CP_ACP
,
3133 full_name
, sizeof (full_name
));
3135 return DECODE_SYSTEM (build_string (full_name
));
3137 else if (NUMBERP (longform
))
3139 got_full
= GetLocaleInfo (XINT (lcid
),
3141 full_name
, sizeof (full_name
));
3142 /* GetLocaleInfo's return value includes the terminating null
3143 character, when the returned information is a string, whereas
3144 make_unibyte_string needs the string length without the
3145 terminating null. */
3147 return make_unibyte_string (full_name
, got_full
- 1);
3154 DEFUN ("w32-get-current-locale-id", Fw32_get_current_locale_id
,
3155 Sw32_get_current_locale_id
, 0, 0, 0,
3156 doc
: /* Return Windows locale id for current locale setting.
3157 This is a numerical value; use `w32-get-locale-info' to convert to a
3158 human-readable form. */)
3161 return make_number (GetThreadLocale ());
3165 int_from_hex (char * s
)
3168 static char hex
[] = "0123456789abcdefABCDEF";
3171 while (*s
&& (p
= strchr (hex
, *s
)) != NULL
)
3173 unsigned digit
= p
- hex
;
3176 val
= val
* 16 + digit
;
3182 /* We need to build a global list, since the EnumSystemLocale callback
3183 function isn't given a context pointer. */
3184 Lisp_Object Vw32_valid_locale_ids
;
3186 static BOOL CALLBACK ALIGN_STACK
3187 enum_locale_fn (LPTSTR localeNum
)
3189 DWORD id
= int_from_hex (localeNum
);
3190 Vw32_valid_locale_ids
= Fcons (make_number (id
), Vw32_valid_locale_ids
);
3194 DEFUN ("w32-get-valid-locale-ids", Fw32_get_valid_locale_ids
,
3195 Sw32_get_valid_locale_ids
, 0, 0, 0,
3196 doc
: /* Return list of all valid Windows locale ids.
3197 Each id is a numerical value; use `w32-get-locale-info' to convert to a
3198 human-readable form. */)
3201 Vw32_valid_locale_ids
= Qnil
;
3203 EnumSystemLocales (enum_locale_fn
, LCID_SUPPORTED
);
3205 Vw32_valid_locale_ids
= Fnreverse (Vw32_valid_locale_ids
);
3206 return Vw32_valid_locale_ids
;
3210 DEFUN ("w32-get-default-locale-id", Fw32_get_default_locale_id
, Sw32_get_default_locale_id
, 0, 1, 0,
3211 doc
: /* Return Windows locale id for default locale setting.
3212 By default, the system default locale setting is returned; if the optional
3213 parameter USERP is non-nil, the user default locale setting is returned.
3214 This is a numerical value; use `w32-get-locale-info' to convert to a
3215 human-readable form. */)
3219 return make_number (GetSystemDefaultLCID ());
3220 return make_number (GetUserDefaultLCID ());
3224 DEFUN ("w32-set-current-locale", Fw32_set_current_locale
, Sw32_set_current_locale
, 1, 1, 0,
3225 doc
: /* Make Windows locale LCID be the current locale setting for Emacs.
3226 If successful, the new locale id is returned, otherwise nil. */)
3229 CHECK_NUMBER (lcid
);
3231 if (!IsValidLocale (XINT (lcid
), LCID_SUPPORTED
))
3234 if (!SetThreadLocale (XINT (lcid
)))
3237 /* Need to set input thread locale if present. */
3238 if (dwWindowsThreadId
)
3239 /* Reply is not needed. */
3240 PostThreadMessage (dwWindowsThreadId
, WM_EMACS_SETLOCALE
, XINT (lcid
), 0);
3242 return make_number (GetThreadLocale ());
3246 /* We need to build a global list, since the EnumCodePages callback
3247 function isn't given a context pointer. */
3248 Lisp_Object Vw32_valid_codepages
;
3250 static BOOL CALLBACK ALIGN_STACK
3251 enum_codepage_fn (LPTSTR codepageNum
)
3253 DWORD id
= atoi (codepageNum
);
3254 Vw32_valid_codepages
= Fcons (make_number (id
), Vw32_valid_codepages
);
3258 DEFUN ("w32-get-valid-codepages", Fw32_get_valid_codepages
,
3259 Sw32_get_valid_codepages
, 0, 0, 0,
3260 doc
: /* Return list of all valid Windows codepages. */)
3263 Vw32_valid_codepages
= Qnil
;
3265 EnumSystemCodePages (enum_codepage_fn
, CP_SUPPORTED
);
3267 Vw32_valid_codepages
= Fnreverse (Vw32_valid_codepages
);
3268 return Vw32_valid_codepages
;
3272 DEFUN ("w32-get-console-codepage", Fw32_get_console_codepage
,
3273 Sw32_get_console_codepage
, 0, 0, 0,
3274 doc
: /* Return current Windows codepage for console input. */)
3277 return make_number (GetConsoleCP ());
3281 DEFUN ("w32-set-console-codepage", Fw32_set_console_codepage
,
3282 Sw32_set_console_codepage
, 1, 1, 0,
3283 doc
: /* Make Windows codepage CP be the codepage for Emacs tty keyboard input.
3284 This codepage setting affects keyboard input in tty mode.
3285 If successful, the new CP is returned, otherwise nil. */)
3290 if (!IsValidCodePage (XINT (cp
)))
3293 if (!SetConsoleCP (XINT (cp
)))
3296 return make_number (GetConsoleCP ());
3300 DEFUN ("w32-get-console-output-codepage", Fw32_get_console_output_codepage
,
3301 Sw32_get_console_output_codepage
, 0, 0, 0,
3302 doc
: /* Return current Windows codepage for console output. */)
3305 return make_number (GetConsoleOutputCP ());
3309 DEFUN ("w32-set-console-output-codepage", Fw32_set_console_output_codepage
,
3310 Sw32_set_console_output_codepage
, 1, 1, 0,
3311 doc
: /* Make Windows codepage CP be the codepage for Emacs console output.
3312 This codepage setting affects display in tty mode.
3313 If successful, the new CP is returned, otherwise nil. */)
3318 if (!IsValidCodePage (XINT (cp
)))
3321 if (!SetConsoleOutputCP (XINT (cp
)))
3324 return make_number (GetConsoleOutputCP ());
3328 DEFUN ("w32-get-codepage-charset", Fw32_get_codepage_charset
,
3329 Sw32_get_codepage_charset
, 1, 1, 0,
3330 doc
: /* Return charset ID corresponding to codepage CP.
3331 Returns nil if the codepage is not valid or its charset ID could
3334 Note that this function is only guaranteed to work with ANSI
3335 codepages; most console codepages are not supported and will
3344 if (!IsValidCodePage (XINT (cp
)))
3347 /* Going through a temporary DWORD_PTR variable avoids compiler warning
3348 about cast to pointer from integer of different size, when
3349 building --with-wide-int or building for 64bit. */
3351 if (TranslateCharsetInfo ((DWORD
*) dwcp
, &info
, TCI_SRCCODEPAGE
))
3352 return make_number (info
.ciCharset
);
3358 DEFUN ("w32-get-valid-keyboard-layouts", Fw32_get_valid_keyboard_layouts
,
3359 Sw32_get_valid_keyboard_layouts
, 0, 0, 0,
3360 doc
: /* Return list of Windows keyboard languages and layouts.
3361 The return value is a list of pairs of language id and layout id. */)
3364 int num_layouts
= GetKeyboardLayoutList (0, NULL
);
3365 HKL
* layouts
= (HKL
*) alloca (num_layouts
* sizeof (HKL
));
3366 Lisp_Object obj
= Qnil
;
3368 if (GetKeyboardLayoutList (num_layouts
, layouts
) == num_layouts
)
3370 while (--num_layouts
>= 0)
3372 HKL kl
= layouts
[num_layouts
];
3374 obj
= Fcons (Fcons (make_number (LOWORD (kl
)),
3375 make_number (HIWORD (kl
))),
3384 DEFUN ("w32-get-keyboard-layout", Fw32_get_keyboard_layout
,
3385 Sw32_get_keyboard_layout
, 0, 0, 0,
3386 doc
: /* Return current Windows keyboard language and layout.
3387 The return value is the cons of the language id and the layout id. */)
3390 HKL kl
= GetKeyboardLayout (dwWindowsThreadId
);
3392 return Fcons (make_number (LOWORD (kl
)),
3393 make_number (HIWORD (kl
)));
3397 DEFUN ("w32-set-keyboard-layout", Fw32_set_keyboard_layout
,
3398 Sw32_set_keyboard_layout
, 1, 1, 0,
3399 doc
: /* Make LAYOUT be the current keyboard layout for Emacs.
3400 The keyboard layout setting affects interpretation of keyboard input.
3401 If successful, the new layout id is returned, otherwise nil. */)
3402 (Lisp_Object layout
)
3406 CHECK_CONS (layout
);
3407 CHECK_NUMBER_CAR (layout
);
3408 CHECK_NUMBER_CDR (layout
);
3410 kl
= (HKL
) (UINT_PTR
) ((XINT (XCAR (layout
)) & 0xffff)
3411 | (XINT (XCDR (layout
)) << 16));
3413 /* Synchronize layout with input thread. */
3414 if (dwWindowsThreadId
)
3416 if (PostThreadMessage (dwWindowsThreadId
, WM_EMACS_SETKEYBOARDLAYOUT
,
3420 GetMessage (&msg
, NULL
, WM_EMACS_DONE
, WM_EMACS_DONE
);
3422 if (msg
.wParam
== 0)
3426 else if (!ActivateKeyboardLayout (kl
, 0))
3429 return Fw32_get_keyboard_layout ();
3432 /* Two variables to interface between get_lcid and the EnumLocales
3433 callback function below. */
3434 #ifndef LOCALE_NAME_MAX_LENGTH
3435 # define LOCALE_NAME_MAX_LENGTH 85
3437 static LCID found_lcid
;
3438 static char lname
[3 * LOCALE_NAME_MAX_LENGTH
+ 1 + 1];
3440 /* Callback function for EnumLocales. */
3441 static BOOL CALLBACK
3442 get_lcid_callback (LPTSTR locale_num_str
)
3445 char locval
[2 * LOCALE_NAME_MAX_LENGTH
+ 1 + 1];
3446 LCID try_lcid
= strtoul (locale_num_str
, &endp
, 16);
3448 if (GetLocaleInfo (try_lcid
, LOCALE_SABBREVLANGNAME
,
3449 locval
, LOCALE_NAME_MAX_LENGTH
))
3453 /* This is for when they only specify the language, as in "ENU". */
3454 if (stricmp (locval
, lname
) == 0)
3456 found_lcid
= try_lcid
;
3459 locval_len
= strlen (locval
);
3460 strcpy (locval
+ locval_len
, "_");
3461 if (GetLocaleInfo (try_lcid
, LOCALE_SABBREVCTRYNAME
,
3462 locval
+ locval_len
+ 1, LOCALE_NAME_MAX_LENGTH
))
3464 locval_len
= strlen (locval
);
3465 if (strnicmp (locval
, lname
, locval_len
) == 0
3466 && (lname
[locval_len
] == '.'
3467 || lname
[locval_len
] == '\0'))
3469 found_lcid
= try_lcid
;
3477 /* Return the Locale ID (LCID) number given the locale's name, a
3478 string, in LOCALE_NAME. This works by enumerating all the locales
3479 supported by the system, until we find one whose name matches
3482 get_lcid (const char *locale_name
)
3484 /* A simple cache. */
3485 static LCID last_lcid
;
3486 static char last_locale
[1000];
3488 /* The code below is not thread-safe, as it uses static variables.
3489 But this function is called only from the Lisp thread. */
3490 if (last_lcid
> 0 && strcmp (locale_name
, last_locale
) == 0)
3493 strncpy (lname
, locale_name
, sizeof (lname
) - 1);
3494 lname
[sizeof (lname
) - 1] = '\0';
3496 EnumSystemLocales (get_lcid_callback
, LCID_SUPPORTED
);
3499 last_lcid
= found_lcid
;
3500 strcpy (last_locale
, locale_name
);
3505 #ifndef _NSLCMPERROR
3506 # define _NSLCMPERROR INT_MAX
3508 #ifndef LINGUISTIC_IGNORECASE
3509 # define LINGUISTIC_IGNORECASE 0x00000010
3512 typedef int (WINAPI
*CompareStringW_Proc
)
3513 (LCID
, DWORD
, LPCWSTR
, int, LPCWSTR
, int);
3516 w32_compare_strings (const char *s1
, const char *s2
, char *locname
,
3519 LCID lcid
= GetThreadLocale ();
3520 wchar_t *string1_w
, *string2_w
;
3522 extern BOOL g_b_init_compare_string_w
;
3523 static CompareStringW_Proc pCompareStringW
;
3528 /* The LCID machinery doesn't seem to support the "C" locale, so we
3529 need to do that by hand. */
3531 && ((locname
[0] == 'C' && (locname
[1] == '\0' || locname
[1] == '.'))
3532 || strcmp (locname
, "POSIX") == 0))
3533 return (ignore_case
? stricmp (s1
, s2
) : strcmp (s1
, s2
));
3535 if (!g_b_init_compare_string_w
)
3537 if (os_subtype
== OS_9X
)
3540 (CompareStringW_Proc
) GetProcAddress (LoadLibrary ("Unicows.dll"),
3542 if (!pCompareStringW
)
3545 /* This return value is compatible with wcscoll and
3546 other MS CRT functions. */
3547 return _NSLCMPERROR
;
3551 pCompareStringW
= CompareStringW
;
3553 g_b_init_compare_string_w
= 1;
3556 needed
= pMultiByteToWideChar (CP_UTF8
, MB_ERR_INVALID_CHARS
, s1
, -1, NULL
, 0);
3559 SAFE_NALLOCA (string1_w
, 1, needed
+ 1);
3560 pMultiByteToWideChar (CP_UTF8
, MB_ERR_INVALID_CHARS
, s1
, -1,
3566 return _NSLCMPERROR
;
3569 needed
= pMultiByteToWideChar (CP_UTF8
, MB_ERR_INVALID_CHARS
, s2
, -1, NULL
, 0);
3572 SAFE_NALLOCA (string2_w
, 1, needed
+ 1);
3573 pMultiByteToWideChar (CP_UTF8
, MB_ERR_INVALID_CHARS
, s2
, -1,
3580 return _NSLCMPERROR
;
3585 /* Convert locale name string to LCID. We don't want to use
3586 LocaleNameToLCID because (a) it is only available since
3587 Vista, and (b) it doesn't accept locale names returned by
3588 'setlocale' and 'GetLocaleInfo'. */
3589 LCID new_lcid
= get_lcid (locname
);
3594 error ("Invalid locale %s: Invalid argument", locname
);
3599 /* NORM_IGNORECASE ignores any tertiary distinction, not just
3600 case variants. LINGUISTIC_IGNORECASE is more selective, and
3601 is sensitive to the locale's language, but it is not
3602 available before Vista. */
3603 if (w32_major_version
>= 6)
3604 flags
|= LINGUISTIC_IGNORECASE
;
3606 flags
|= NORM_IGNORECASE
;
3608 /* This approximates what glibc collation functions do when the
3609 locale's codeset is UTF-8. */
3610 if (!NILP (Vw32_collate_ignore_punctuation
))
3611 flags
|= NORM_IGNORESYMBOLS
;
3612 val
= pCompareStringW (lcid
, flags
, string1_w
, -1, string2_w
, -1);
3617 return _NSLCMPERROR
;
3624 syms_of_ntproc (void)
3626 DEFSYM (Qhigh
, "high");
3627 DEFSYM (Qlow
, "low");
3628 DEFSYM (Qcygwin
, "cygwin");
3629 DEFSYM (Qmsys
, "msys");
3630 DEFSYM (Qw32_native
, "w32-native");
3632 defsubr (&Sw32_has_winsock
);
3633 defsubr (&Sw32_unload_winsock
);
3635 defsubr (&Sw32_short_file_name
);
3636 defsubr (&Sw32_long_file_name
);
3637 defsubr (&Sw32_set_process_priority
);
3638 defsubr (&Sw32_application_type
);
3639 defsubr (&Sw32_get_locale_info
);
3640 defsubr (&Sw32_get_current_locale_id
);
3641 defsubr (&Sw32_get_default_locale_id
);
3642 defsubr (&Sw32_get_valid_locale_ids
);
3643 defsubr (&Sw32_set_current_locale
);
3645 defsubr (&Sw32_get_console_codepage
);
3646 defsubr (&Sw32_set_console_codepage
);
3647 defsubr (&Sw32_get_console_output_codepage
);
3648 defsubr (&Sw32_set_console_output_codepage
);
3649 defsubr (&Sw32_get_valid_codepages
);
3650 defsubr (&Sw32_get_codepage_charset
);
3652 defsubr (&Sw32_get_valid_keyboard_layouts
);
3653 defsubr (&Sw32_get_keyboard_layout
);
3654 defsubr (&Sw32_set_keyboard_layout
);
3656 DEFVAR_LISP ("w32-quote-process-args", Vw32_quote_process_args
,
3657 doc
: /* Non-nil enables quoting of process arguments to ensure correct parsing.
3658 Because Windows does not directly pass argv arrays to child processes,
3659 programs have to reconstruct the argv array by parsing the command
3660 line string. For an argument to contain a space, it must be enclosed
3661 in double quotes or it will be parsed as multiple arguments.
3663 If the value is a character, that character will be used to escape any
3664 quote characters that appear, otherwise a suitable escape character
3665 will be chosen based on the type of the program. */);
3666 Vw32_quote_process_args
= Qt
;
3668 DEFVAR_LISP ("w32-start-process-show-window",
3669 Vw32_start_process_show_window
,
3670 doc
: /* When nil, new child processes hide their windows.
3671 When non-nil, they show their window in the method of their choice.
3672 This variable doesn't affect GUI applications, which will never be hidden. */);
3673 Vw32_start_process_show_window
= Qnil
;
3675 DEFVAR_LISP ("w32-start-process-share-console",
3676 Vw32_start_process_share_console
,
3677 doc
: /* When nil, new child processes are given a new console.
3678 When non-nil, they share the Emacs console; this has the limitation of
3679 allowing only one DOS subprocess to run at a time (whether started directly
3680 or indirectly by Emacs), and preventing Emacs from cleanly terminating the
3681 subprocess group, but may allow Emacs to interrupt a subprocess that doesn't
3682 otherwise respond to interrupts from Emacs. */);
3683 Vw32_start_process_share_console
= Qnil
;
3685 DEFVAR_LISP ("w32-start-process-inherit-error-mode",
3686 Vw32_start_process_inherit_error_mode
,
3687 doc
: /* When nil, new child processes revert to the default error mode.
3688 When non-nil, they inherit their error mode setting from Emacs, which stops
3689 them blocking when trying to access unmounted drives etc. */);
3690 Vw32_start_process_inherit_error_mode
= Qt
;
3692 DEFVAR_INT ("w32-pipe-read-delay", w32_pipe_read_delay
,
3693 doc
: /* Forced delay before reading subprocess output.
3694 This is done to improve the buffering of subprocess output, by
3695 avoiding the inefficiency of frequently reading small amounts of data.
3697 If positive, the value is the number of milliseconds to sleep before
3698 reading the subprocess output. If negative, the magnitude is the number
3699 of time slices to wait (effectively boosting the priority of the child
3700 process temporarily). A value of zero disables waiting entirely. */);
3701 w32_pipe_read_delay
= 50;
3703 DEFVAR_LISP ("w32-downcase-file-names", Vw32_downcase_file_names
,
3704 doc
: /* Non-nil means convert all-upper case file names to lower case.
3705 This applies when performing completions and file name expansion.
3706 Note that the value of this setting also affects remote file names,
3707 so you probably don't want to set to non-nil if you use case-sensitive
3708 filesystems via ange-ftp. */);
3709 Vw32_downcase_file_names
= Qnil
;
3712 DEFVAR_LISP ("w32-generate-fake-inodes", Vw32_generate_fake_inodes
,
3713 doc
: /* Non-nil means attempt to fake realistic inode values.
3714 This works by hashing the truename of files, and should detect
3715 aliasing between long and short (8.3 DOS) names, but can have
3716 false positives because of hash collisions. Note that determining
3717 the truename of a file can be slow. */);
3718 Vw32_generate_fake_inodes
= Qnil
;
3721 DEFVAR_LISP ("w32-get-true-file-attributes", Vw32_get_true_file_attributes
,
3722 doc
: /* Non-nil means determine accurate file attributes in `file-attributes'.
3723 This option controls whether to issue additional system calls to determine
3724 accurate link counts, file type, and ownership information. It is more
3725 useful for files on NTFS volumes, where hard links and file security are
3726 supported, than on volumes of the FAT family.
3728 Without these system calls, link count will always be reported as 1 and file
3729 ownership will be attributed to the current user.
3730 The default value `local' means only issue these system calls for files
3731 on local fixed drives. A value of nil means never issue them.
3732 Any other non-nil value means do this even on remote and removable drives
3733 where the performance impact may be noticeable even on modern hardware. */);
3734 Vw32_get_true_file_attributes
= Qlocal
;
3736 DEFVAR_LISP ("w32-collate-ignore-punctuation",
3737 Vw32_collate_ignore_punctuation
,
3738 doc
: /* Non-nil causes string collation functions ignore punctuation on MS-Windows.
3739 On Posix platforms, `string-collate-lessp' and `string-collate-equalp'
3740 ignore punctuation characters when they compare strings, if the
3741 locale's codeset is UTF-8, as in \"en_US.UTF-8\". Binding this option
3742 to a non-nil value will achieve a similar effect on MS-Windows, where
3743 locales with UTF-8 codeset are not supported.
3745 Note that setting this to non-nil will also ignore blanks and symbols
3746 in the strings. So do NOT use this option when comparing file names
3747 for equality, only when you need to sort them. */);
3748 Vw32_collate_ignore_punctuation
= Qnil
;
3750 staticpro (&Vw32_valid_locale_ids
);
3751 staticpro (&Vw32_valid_codepages
);
3753 /* end of w32proc.c */