Commit | Line | Data |
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b46a6a83 | 1 | /* Process support for GNU Emacs on the Microsoft Windows API. |
ab422c4d | 2 | Copyright (C) 1992, 1995, 1999-2013 Free Software Foundation, Inc. |
6cdfb6e6 | 3 | |
3b7ad313 EN |
4 | This file is part of GNU Emacs. |
5 | ||
9ec0b715 | 6 | GNU Emacs is free software: you can redistribute it and/or modify |
3b7ad313 | 7 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
8 | the Free Software Foundation, either version 3 of the License, or |
9 | (at your option) any later version. | |
3b7ad313 EN |
10 | |
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 17 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
6cdfb6e6 | 18 | |
9ec0b715 | 19 | /* |
6cdfb6e6 RS |
20 | Drew Bliss Oct 14, 1993 |
21 | Adapted from alarm.c by Tim Fleehart | |
22 | */ | |
23 | ||
24 | #include <stdio.h> | |
25 | #include <stdlib.h> | |
26 | #include <errno.h> | |
a68089e4 | 27 | #include <ctype.h> |
6cdfb6e6 | 28 | #include <io.h> |
c519b5e1 | 29 | #include <fcntl.h> |
6cdfb6e6 | 30 | #include <signal.h> |
51f635c4 | 31 | #include <sys/file.h> |
6cdfb6e6 | 32 | |
c519b5e1 | 33 | /* must include CRT headers *before* config.h */ |
4838e624 | 34 | #include <config.h> |
4838e624 | 35 | |
c519b5e1 GV |
36 | #undef signal |
37 | #undef wait | |
38 | #undef spawnve | |
39 | #undef select | |
40 | #undef kill | |
41 | ||
6cdfb6e6 | 42 | #include <windows.h> |
42c95ffb AI |
43 | #ifdef __GNUC__ |
44 | /* This definition is missing from mingw32 headers. */ | |
ed3751c8 | 45 | extern BOOL WINAPI IsValidLocale (LCID, DWORD); |
42c95ffb | 46 | #endif |
6cdfb6e6 | 47 | |
d613418b EZ |
48 | #ifdef HAVE_LANGINFO_CODESET |
49 | #include <nl_types.h> | |
50 | #include <langinfo.h> | |
51 | #endif | |
52 | ||
6cdfb6e6 | 53 | #include "lisp.h" |
489f9371 | 54 | #include "w32.h" |
501199a3 | 55 | #include "w32common.h" |
b2fc9f3d | 56 | #include "w32heap.h" |
6cdfb6e6 | 57 | #include "systime.h" |
3d7eead0 GV |
58 | #include "syswait.h" |
59 | #include "process.h" | |
e7c15bba | 60 | #include "syssignal.h" |
ef79fbba | 61 | #include "w32term.h" |
f481eb31 | 62 | #include "dispextern.h" /* for xstrcasecmp */ |
b23077df | 63 | #include "coding.h" |
3d7eead0 | 64 | |
8747ac3f EZ |
65 | #define RVA_TO_PTR(var,section,filedata) \ |
66 | ((void *)((section)->PointerToRawData \ | |
62aba0d4 | 67 | + ((DWORD_PTR)(var) - (section)->VirtualAddress) \ |
8747ac3f EZ |
68 | + (filedata).file_base)) |
69 | ||
b2fc9f3d | 70 | Lisp_Object Qhigh, Qlow; |
817abdf6 | 71 | |
6cdfb6e6 RS |
72 | /* Signal handlers...SIG_DFL == 0 so this is initialized correctly. */ |
73 | static signal_handler sig_handlers[NSIG]; | |
74 | ||
c06c382a EZ |
75 | static sigset_t sig_mask; |
76 | ||
77 | static CRITICAL_SECTION crit_sig; | |
78 | ||
16b22fef | 79 | /* Improve on the CRT 'signal' implementation so that we could record |
c06c382a | 80 | the SIGCHLD handler and fake interval timers. */ |
177c0ea7 | 81 | signal_handler |
c519b5e1 | 82 | sys_signal (int sig, signal_handler handler) |
6cdfb6e6 RS |
83 | { |
84 | signal_handler old; | |
177c0ea7 | 85 | |
16b22fef | 86 | /* SIGCHLD is needed for supporting subprocesses, see sys_kill |
c06c382a EZ |
87 | below. SIGALRM and SIGPROF are used by setitimer. All the |
88 | others are the only ones supported by the MS runtime. */ | |
16b22fef | 89 | if (!(sig == SIGCHLD || sig == SIGSEGV || sig == SIGILL |
c06c382a EZ |
90 | || sig == SIGFPE || sig == SIGABRT || sig == SIGTERM |
91 | || sig == SIGALRM || sig == SIGPROF)) | |
6cdfb6e6 RS |
92 | { |
93 | errno = EINVAL; | |
94 | return SIG_ERR; | |
95 | } | |
96 | old = sig_handlers[sig]; | |
16b22fef EZ |
97 | /* SIGABRT is treated specially because w32.c installs term_ntproc |
98 | as its handler, so we don't want to override that afterwards. | |
99 | Aborting Emacs works specially anyway: either by calling | |
100 | emacs_abort directly or through terminate_due_to_signal, which | |
101 | calls emacs_abort through emacs_raise. */ | |
102 | if (!(sig == SIGABRT && old == term_ntproc)) | |
103 | { | |
104 | sig_handlers[sig] = handler; | |
c06c382a | 105 | if (!(sig == SIGCHLD || sig == SIGALRM || sig == SIGPROF)) |
16b22fef EZ |
106 | signal (sig, handler); |
107 | } | |
6cdfb6e6 RS |
108 | return old; |
109 | } | |
110 | ||
3e6d6928 EZ |
111 | /* Emulate sigaction. */ |
112 | int | |
113 | sigaction (int sig, const struct sigaction *act, struct sigaction *oact) | |
114 | { | |
16b22fef EZ |
115 | signal_handler old = SIG_DFL; |
116 | int retval = 0; | |
117 | ||
118 | if (act) | |
119 | old = sys_signal (sig, act->sa_handler); | |
120 | else if (oact) | |
121 | old = sig_handlers[sig]; | |
3e6d6928 | 122 | |
16b22fef | 123 | if (old == SIG_ERR) |
3e6d6928 EZ |
124 | { |
125 | errno = EINVAL; | |
16b22fef | 126 | retval = -1; |
3e6d6928 | 127 | } |
3e6d6928 EZ |
128 | if (oact) |
129 | { | |
130 | oact->sa_handler = old; | |
131 | oact->sa_flags = 0; | |
132 | oact->sa_mask = empty_mask; | |
133 | } | |
16b22fef | 134 | return retval; |
3e6d6928 EZ |
135 | } |
136 | ||
c06c382a EZ |
137 | /* Emulate signal sets and blocking of signals used by timers. */ |
138 | ||
139 | int | |
140 | sigemptyset (sigset_t *set) | |
141 | { | |
142 | *set = 0; | |
143 | return 0; | |
144 | } | |
145 | ||
146 | int | |
147 | sigaddset (sigset_t *set, int signo) | |
148 | { | |
149 | if (!set) | |
150 | { | |
151 | errno = EINVAL; | |
152 | return -1; | |
153 | } | |
154 | if (signo < 0 || signo >= NSIG) | |
155 | { | |
156 | errno = EINVAL; | |
157 | return -1; | |
158 | } | |
159 | ||
160 | *set |= (1U << signo); | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | int | |
166 | sigfillset (sigset_t *set) | |
167 | { | |
168 | if (!set) | |
169 | { | |
170 | errno = EINVAL; | |
171 | return -1; | |
172 | } | |
173 | ||
174 | *set = 0xFFFFFFFF; | |
175 | return 0; | |
176 | } | |
177 | ||
178 | int | |
179 | sigprocmask (int how, const sigset_t *set, sigset_t *oset) | |
180 | { | |
181 | if (!(how == SIG_BLOCK || how == SIG_UNBLOCK || how == SIG_SETMASK)) | |
182 | { | |
183 | errno = EINVAL; | |
184 | return -1; | |
185 | } | |
186 | ||
187 | if (oset) | |
188 | *oset = sig_mask; | |
189 | ||
190 | if (!set) | |
191 | return 0; | |
192 | ||
193 | switch (how) | |
194 | { | |
195 | case SIG_BLOCK: | |
196 | sig_mask |= *set; | |
197 | break; | |
198 | case SIG_SETMASK: | |
199 | sig_mask = *set; | |
200 | break; | |
201 | case SIG_UNBLOCK: | |
202 | /* FIXME: Catch signals that are blocked and reissue them when | |
203 | they are unblocked. Important for SIGALRM and SIGPROF only. */ | |
204 | sig_mask &= ~(*set); | |
205 | break; | |
206 | } | |
207 | ||
208 | return 0; | |
209 | } | |
210 | ||
211 | int | |
212 | pthread_sigmask (int how, const sigset_t *set, sigset_t *oset) | |
213 | { | |
214 | if (sigprocmask (how, set, oset) == -1) | |
215 | return EINVAL; | |
216 | return 0; | |
217 | } | |
218 | ||
219 | int | |
220 | sigismember (const sigset_t *set, int signo) | |
221 | { | |
222 | if (signo < 0 || signo >= NSIG) | |
223 | { | |
224 | errno = EINVAL; | |
225 | return -1; | |
226 | } | |
227 | if (signo > sizeof (*set) * BITS_PER_CHAR) | |
228 | emacs_abort (); | |
229 | ||
230 | return (*set & (1U << signo)) != 0; | |
231 | } | |
232 | ||
233 | int | |
234 | setpgrp (int pid, int gid) | |
235 | { | |
236 | return 0; | |
237 | } | |
238 | ||
7e8b50d9 EZ |
239 | pid_t |
240 | getpgrp (void) | |
241 | { | |
242 | return getpid (); | |
243 | } | |
244 | ||
245 | int | |
246 | setpgid (pid_t pid, pid_t pgid) | |
247 | { | |
248 | return 0; | |
249 | } | |
250 | ||
c06c382a EZ |
251 | /* Emulations of interval timers. |
252 | ||
253 | Limitations: only ITIMER_REAL and ITIMER_PROF are supported. | |
254 | ||
255 | Implementation: a separate thread is started for each timer type, | |
256 | the thread calls the appropriate signal handler when the timer | |
257 | expires, after stopping the thread which installed the timer. */ | |
258 | ||
c06c382a | 259 | struct itimer_data { |
2e612797 EZ |
260 | volatile ULONGLONG expire; |
261 | volatile ULONGLONG reload; | |
262 | volatile int terminate; | |
c06c382a EZ |
263 | int type; |
264 | HANDLE caller_thread; | |
265 | HANDLE timer_thread; | |
266 | }; | |
267 | ||
6c16c13e | 268 | static ULONGLONG ticks_now; |
c06c382a | 269 | static struct itimer_data real_itimer, prof_itimer; |
6c16c13e | 270 | static ULONGLONG clocks_min; |
f0e5f225 EZ |
271 | /* If non-zero, itimers are disabled. Used during shutdown, when we |
272 | delete the critical sections used by the timer threads. */ | |
273 | static int disable_itimers; | |
c06c382a EZ |
274 | |
275 | static CRITICAL_SECTION crit_real, crit_prof; | |
276 | ||
15cc05e9 | 277 | /* GetThreadTimes is not available on Windows 9X and possibly also on 2K. */ |
6c16c13e EZ |
278 | typedef BOOL (WINAPI *GetThreadTimes_Proc) ( |
279 | HANDLE hThread, | |
280 | LPFILETIME lpCreationTime, | |
281 | LPFILETIME lpExitTime, | |
282 | LPFILETIME lpKernelTime, | |
283 | LPFILETIME lpUserTime); | |
284 | ||
285 | static GetThreadTimes_Proc s_pfn_Get_Thread_Times; | |
286 | ||
640bf8ad EZ |
287 | #define MAX_SINGLE_SLEEP 30 |
288 | #define TIMER_TICKS_PER_SEC 1000 | |
289 | ||
6c16c13e EZ |
290 | /* Return a suitable time value, in 1-ms units, for THREAD, a handle |
291 | to a thread. If THREAD is NULL or an invalid handle, return the | |
292 | current wall-clock time since January 1, 1601 (UTC). Otherwise, | |
293 | return the sum of kernel and user times used by THREAD since it was | |
294 | created, plus its creation time. */ | |
295 | static ULONGLONG | |
296 | w32_get_timer_time (HANDLE thread) | |
297 | { | |
298 | ULONGLONG retval; | |
299 | int use_system_time = 1; | |
640bf8ad EZ |
300 | /* The functions below return times in 100-ns units. */ |
301 | const int tscale = 10 * TIMER_TICKS_PER_SEC; | |
6c16c13e EZ |
302 | |
303 | if (thread && thread != INVALID_HANDLE_VALUE | |
304 | && s_pfn_Get_Thread_Times != NULL) | |
305 | { | |
306 | FILETIME creation_ftime, exit_ftime, kernel_ftime, user_ftime; | |
307 | ULARGE_INTEGER temp_creation, temp_kernel, temp_user; | |
308 | ||
309 | if (s_pfn_Get_Thread_Times (thread, &creation_ftime, &exit_ftime, | |
310 | &kernel_ftime, &user_ftime)) | |
311 | { | |
312 | use_system_time = 0; | |
313 | temp_creation.LowPart = creation_ftime.dwLowDateTime; | |
314 | temp_creation.HighPart = creation_ftime.dwHighDateTime; | |
315 | temp_kernel.LowPart = kernel_ftime.dwLowDateTime; | |
316 | temp_kernel.HighPart = kernel_ftime.dwHighDateTime; | |
317 | temp_user.LowPart = user_ftime.dwLowDateTime; | |
318 | temp_user.HighPart = user_ftime.dwHighDateTime; | |
319 | retval = | |
640bf8ad EZ |
320 | temp_creation.QuadPart / tscale + temp_kernel.QuadPart / tscale |
321 | + temp_user.QuadPart / tscale; | |
6c16c13e EZ |
322 | } |
323 | else | |
324 | DebPrint (("GetThreadTimes failed with error code %lu\n", | |
325 | GetLastError ())); | |
326 | } | |
327 | ||
328 | if (use_system_time) | |
329 | { | |
330 | FILETIME current_ftime; | |
331 | ULARGE_INTEGER temp; | |
332 | ||
333 | GetSystemTimeAsFileTime (¤t_ftime); | |
334 | ||
335 | temp.LowPart = current_ftime.dwLowDateTime; | |
336 | temp.HighPart = current_ftime.dwHighDateTime; | |
337 | ||
640bf8ad | 338 | retval = temp.QuadPart / tscale; |
6c16c13e EZ |
339 | } |
340 | ||
341 | return retval; | |
342 | } | |
343 | ||
6c16c13e | 344 | /* Thread function for a timer thread. */ |
c06c382a EZ |
345 | static DWORD WINAPI |
346 | timer_loop (LPVOID arg) | |
347 | { | |
348 | struct itimer_data *itimer = (struct itimer_data *)arg; | |
349 | int which = itimer->type; | |
350 | int sig = (which == ITIMER_REAL) ? SIGALRM : SIGPROF; | |
351 | CRITICAL_SECTION *crit = (which == ITIMER_REAL) ? &crit_real : &crit_prof; | |
640bf8ad | 352 | const DWORD max_sleep = MAX_SINGLE_SLEEP * 1000 / TIMER_TICKS_PER_SEC; |
6c16c13e | 353 | HANDLE hth = (which == ITIMER_REAL) ? NULL : itimer->caller_thread; |
c06c382a EZ |
354 | |
355 | while (1) | |
356 | { | |
357 | DWORD sleep_time; | |
358 | signal_handler handler; | |
6c16c13e | 359 | ULONGLONG now, expire, reload; |
c06c382a EZ |
360 | |
361 | /* Load new values if requested by setitimer. */ | |
362 | EnterCriticalSection (crit); | |
363 | expire = itimer->expire; | |
364 | reload = itimer->reload; | |
365 | LeaveCriticalSection (crit); | |
366 | if (itimer->terminate) | |
367 | return 0; | |
368 | ||
6c16c13e | 369 | if (expire == 0) |
c06c382a EZ |
370 | { |
371 | /* We are idle. */ | |
372 | Sleep (max_sleep); | |
373 | continue; | |
374 | } | |
375 | ||
6c16c13e | 376 | if (expire > (now = w32_get_timer_time (hth))) |
c06c382a EZ |
377 | sleep_time = expire - now; |
378 | else | |
379 | sleep_time = 0; | |
380 | /* Don't sleep too long at a time, to be able to see the | |
381 | termination flag without too long a delay. */ | |
382 | while (sleep_time > max_sleep) | |
383 | { | |
384 | if (itimer->terminate) | |
385 | return 0; | |
386 | Sleep (max_sleep); | |
6c16c13e | 387 | EnterCriticalSection (crit); |
c06c382a | 388 | expire = itimer->expire; |
6c16c13e EZ |
389 | LeaveCriticalSection (crit); |
390 | sleep_time = | |
391 | (expire > (now = w32_get_timer_time (hth))) ? expire - now : 0; | |
c06c382a EZ |
392 | } |
393 | if (itimer->terminate) | |
394 | return 0; | |
395 | if (sleep_time > 0) | |
396 | { | |
640bf8ad | 397 | Sleep (sleep_time * 1000 / TIMER_TICKS_PER_SEC); |
c06c382a EZ |
398 | /* Always sleep past the expiration time, to make sure we |
399 | never call the handler _before_ the expiration time, | |
ace917bd | 400 | always slightly after it. Sleep(5) makes sure we don't |
6c16c13e EZ |
401 | hog the CPU by calling 'w32_get_timer_time' with high |
402 | frequency, and also let other threads work. */ | |
403 | while (w32_get_timer_time (hth) < expire) | |
ace917bd | 404 | Sleep (5); |
c06c382a EZ |
405 | } |
406 | ||
6c16c13e EZ |
407 | EnterCriticalSection (crit); |
408 | expire = itimer->expire; | |
409 | LeaveCriticalSection (crit); | |
410 | if (expire == 0) | |
c06c382a EZ |
411 | continue; |
412 | ||
413 | /* Time's up. */ | |
414 | handler = sig_handlers[sig]; | |
415 | if (!(handler == SIG_DFL || handler == SIG_IGN || handler == SIG_ERR) | |
416 | /* FIXME: Don't ignore masked signals. Instead, record that | |
417 | they happened and reissue them when the signal is | |
418 | unblocked. */ | |
419 | && !sigismember (&sig_mask, sig) | |
420 | /* Simulate masking of SIGALRM and SIGPROF when processing | |
421 | fatal signals. */ | |
422 | && !fatal_error_in_progress | |
423 | && itimer->caller_thread) | |
424 | { | |
425 | /* Simulate a signal delivered to the thread which installed | |
426 | the timer, by suspending that thread while the handler | |
427 | runs. */ | |
730b2d8f EZ |
428 | HANDLE th = itimer->caller_thread; |
429 | DWORD result = SuspendThread (th); | |
c06c382a EZ |
430 | |
431 | if (result == (DWORD)-1) | |
db9848e4 EZ |
432 | return 2; |
433 | ||
c06c382a | 434 | handler (sig); |
730b2d8f | 435 | ResumeThread (th); |
c06c382a EZ |
436 | } |
437 | ||
c06c382a EZ |
438 | /* Update expiration time and loop. */ |
439 | EnterCriticalSection (crit); | |
440 | expire = itimer->expire; | |
6c16c13e EZ |
441 | if (expire == 0) |
442 | { | |
443 | LeaveCriticalSection (crit); | |
444 | continue; | |
445 | } | |
c06c382a EZ |
446 | reload = itimer->reload; |
447 | if (reload > 0) | |
448 | { | |
6c16c13e | 449 | now = w32_get_timer_time (hth); |
c06c382a EZ |
450 | if (expire <= now) |
451 | { | |
6c16c13e | 452 | ULONGLONG lag = now - expire; |
c06c382a EZ |
453 | |
454 | /* If we missed some opportunities (presumably while | |
455 | sleeping or while the signal handler ran), skip | |
456 | them. */ | |
457 | if (lag > reload) | |
458 | expire = now - (lag % reload); | |
459 | ||
460 | expire += reload; | |
461 | } | |
462 | } | |
463 | else | |
464 | expire = 0; /* become idle */ | |
465 | itimer->expire = expire; | |
466 | LeaveCriticalSection (crit); | |
467 | } | |
468 | return 0; | |
469 | } | |
470 | ||
471 | static void | |
472 | stop_timer_thread (int which) | |
473 | { | |
474 | struct itimer_data *itimer = | |
475 | (which == ITIMER_REAL) ? &real_itimer : &prof_itimer; | |
476 | int i; | |
a65fbb5f EZ |
477 | DWORD err, exit_code = 255; |
478 | BOOL status; | |
c06c382a EZ |
479 | |
480 | /* Signal the thread that it should terminate. */ | |
481 | itimer->terminate = 1; | |
482 | ||
483 | if (itimer->timer_thread == NULL) | |
484 | return; | |
485 | ||
486 | /* Wait for the timer thread to terminate voluntarily, then kill it | |
487 | if it doesn't. This loop waits twice more than the maximum | |
488 | amount of time a timer thread sleeps, see above. */ | |
489 | for (i = 0; i < MAX_SINGLE_SLEEP / 5; i++) | |
490 | { | |
491 | if (!((status = GetExitCodeThread (itimer->timer_thread, &exit_code)) | |
492 | && exit_code == STILL_ACTIVE)) | |
493 | break; | |
494 | Sleep (10); | |
495 | } | |
496 | if ((status == FALSE && (err = GetLastError ()) == ERROR_INVALID_HANDLE) | |
497 | || exit_code == STILL_ACTIVE) | |
498 | { | |
499 | if (!(status == FALSE && err == ERROR_INVALID_HANDLE)) | |
500 | TerminateThread (itimer->timer_thread, 0); | |
501 | } | |
502 | ||
503 | /* Clean up. */ | |
504 | CloseHandle (itimer->timer_thread); | |
505 | itimer->timer_thread = NULL; | |
506 | if (itimer->caller_thread) | |
507 | { | |
508 | CloseHandle (itimer->caller_thread); | |
509 | itimer->caller_thread = NULL; | |
510 | } | |
511 | } | |
512 | ||
513 | /* This is called at shutdown time from term_ntproc. */ | |
514 | void | |
515 | term_timers (void) | |
516 | { | |
517 | if (real_itimer.timer_thread) | |
518 | stop_timer_thread (ITIMER_REAL); | |
519 | if (prof_itimer.timer_thread) | |
520 | stop_timer_thread (ITIMER_PROF); | |
521 | ||
f0e5f225 EZ |
522 | /* We are going to delete the critical sections, so timers cannot |
523 | work after this. */ | |
524 | disable_itimers = 1; | |
525 | ||
c06c382a EZ |
526 | DeleteCriticalSection (&crit_real); |
527 | DeleteCriticalSection (&crit_prof); | |
528 | DeleteCriticalSection (&crit_sig); | |
529 | } | |
530 | ||
531 | /* This is called at initialization time from init_ntproc. */ | |
532 | void | |
533 | init_timers (void) | |
534 | { | |
5c6ce1c7 | 535 | /* GetThreadTimes is not available on all versions of Windows, so |
6c16c13e EZ |
536 | need to probe for its availability dynamically, and call it |
537 | through a pointer. */ | |
538 | s_pfn_Get_Thread_Times = NULL; /* in case dumped Emacs comes with a value */ | |
539 | if (os_subtype != OS_9X) | |
540 | s_pfn_Get_Thread_Times = | |
541 | (GetThreadTimes_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"), | |
542 | "GetThreadTimes"); | |
543 | ||
c06c382a EZ |
544 | /* Make sure we start with zeroed out itimer structures, since |
545 | dumping may have left there traces of threads long dead. */ | |
546 | memset (&real_itimer, 0, sizeof real_itimer); | |
547 | memset (&prof_itimer, 0, sizeof prof_itimer); | |
548 | ||
549 | InitializeCriticalSection (&crit_real); | |
550 | InitializeCriticalSection (&crit_prof); | |
551 | InitializeCriticalSection (&crit_sig); | |
f0e5f225 EZ |
552 | |
553 | disable_itimers = 0; | |
c06c382a EZ |
554 | } |
555 | ||
556 | static int | |
557 | start_timer_thread (int which) | |
558 | { | |
559 | DWORD exit_code; | |
730b2d8f | 560 | HANDLE th; |
c06c382a EZ |
561 | struct itimer_data *itimer = |
562 | (which == ITIMER_REAL) ? &real_itimer : &prof_itimer; | |
563 | ||
564 | if (itimer->timer_thread | |
565 | && GetExitCodeThread (itimer->timer_thread, &exit_code) | |
566 | && exit_code == STILL_ACTIVE) | |
567 | return 0; | |
568 | ||
730b2d8f EZ |
569 | /* Clean up after possibly exited thread. */ |
570 | if (itimer->timer_thread) | |
571 | { | |
572 | CloseHandle (itimer->timer_thread); | |
573 | itimer->timer_thread = NULL; | |
574 | } | |
575 | if (itimer->caller_thread) | |
576 | { | |
577 | CloseHandle (itimer->caller_thread); | |
578 | itimer->caller_thread = NULL; | |
579 | } | |
580 | ||
c06c382a | 581 | /* Start a new thread. */ |
730b2d8f EZ |
582 | if (!DuplicateHandle (GetCurrentProcess (), GetCurrentThread (), |
583 | GetCurrentProcess (), &th, 0, FALSE, | |
584 | DUPLICATE_SAME_ACCESS)) | |
585 | { | |
586 | errno = ESRCH; | |
587 | return -1; | |
588 | } | |
c06c382a EZ |
589 | itimer->terminate = 0; |
590 | itimer->type = which; | |
730b2d8f | 591 | itimer->caller_thread = th; |
c06c382a EZ |
592 | /* Request that no more than 64KB of stack be reserved for this |
593 | thread, to avoid reserving too much memory, which would get in | |
594 | the way of threads we start to wait for subprocesses. See also | |
595 | new_child below. */ | |
596 | itimer->timer_thread = CreateThread (NULL, 64 * 1024, timer_loop, | |
597 | (void *)itimer, 0x00010000, NULL); | |
598 | ||
599 | if (!itimer->timer_thread) | |
600 | { | |
601 | CloseHandle (itimer->caller_thread); | |
602 | itimer->caller_thread = NULL; | |
603 | errno = EAGAIN; | |
604 | return -1; | |
605 | } | |
606 | ||
607 | /* This is needed to make sure that the timer thread running for | |
608 | profiling gets CPU as soon as the Sleep call terminates. */ | |
609 | if (which == ITIMER_PROF) | |
730b2d8f | 610 | SetThreadPriority (itimer->timer_thread, THREAD_PRIORITY_TIME_CRITICAL); |
c06c382a | 611 | |
3e6d6928 EZ |
612 | return 0; |
613 | } | |
614 | ||
c06c382a EZ |
615 | /* Most of the code of getitimer and setitimer (but not of their |
616 | subroutines) was shamelessly stolen from itimer.c in the DJGPP | |
617 | library, see www.delorie.com/djgpp. */ | |
618 | int | |
619 | getitimer (int which, struct itimerval *value) | |
620 | { | |
6c16c13e EZ |
621 | volatile ULONGLONG *t_expire; |
622 | volatile ULONGLONG *t_reload; | |
623 | ULONGLONG expire, reload; | |
c06c382a EZ |
624 | __int64 usecs; |
625 | CRITICAL_SECTION *crit; | |
6c16c13e | 626 | struct itimer_data *itimer; |
c06c382a | 627 | |
f0e5f225 EZ |
628 | if (disable_itimers) |
629 | return -1; | |
630 | ||
c06c382a EZ |
631 | if (!value) |
632 | { | |
633 | errno = EFAULT; | |
634 | return -1; | |
635 | } | |
636 | ||
637 | if (which != ITIMER_REAL && which != ITIMER_PROF) | |
638 | { | |
639 | errno = EINVAL; | |
640 | return -1; | |
641 | } | |
642 | ||
6c16c13e EZ |
643 | itimer = (which == ITIMER_REAL) ? &real_itimer : &prof_itimer; |
644 | ||
6c16c13e EZ |
645 | ticks_now = w32_get_timer_time ((which == ITIMER_REAL) |
646 | ? NULL | |
730b2d8f | 647 | : GetCurrentThread ()); |
6c16c13e EZ |
648 | |
649 | t_expire = &itimer->expire; | |
650 | t_reload = &itimer->reload; | |
c06c382a EZ |
651 | crit = (which == ITIMER_REAL) ? &crit_real : &crit_prof; |
652 | ||
653 | EnterCriticalSection (crit); | |
654 | reload = *t_reload; | |
655 | expire = *t_expire; | |
656 | LeaveCriticalSection (crit); | |
657 | ||
658 | if (expire) | |
659 | expire -= ticks_now; | |
660 | ||
640bf8ad EZ |
661 | value->it_value.tv_sec = expire / TIMER_TICKS_PER_SEC; |
662 | usecs = | |
663 | (expire % TIMER_TICKS_PER_SEC) * (__int64)1000000 / TIMER_TICKS_PER_SEC; | |
c06c382a | 664 | value->it_value.tv_usec = usecs; |
640bf8ad EZ |
665 | value->it_interval.tv_sec = reload / TIMER_TICKS_PER_SEC; |
666 | usecs = | |
667 | (reload % TIMER_TICKS_PER_SEC) * (__int64)1000000 / TIMER_TICKS_PER_SEC; | |
c06c382a EZ |
668 | value->it_interval.tv_usec= usecs; |
669 | ||
670 | return 0; | |
671 | } | |
672 | ||
673 | int | |
674 | setitimer(int which, struct itimerval *value, struct itimerval *ovalue) | |
675 | { | |
6c16c13e EZ |
676 | volatile ULONGLONG *t_expire, *t_reload; |
677 | ULONGLONG expire, reload, expire_old, reload_old; | |
c06c382a EZ |
678 | __int64 usecs; |
679 | CRITICAL_SECTION *crit; | |
6c16c13e | 680 | struct itimerval tem, *ptem; |
c06c382a | 681 | |
f0e5f225 EZ |
682 | if (disable_itimers) |
683 | return -1; | |
684 | ||
c06c382a EZ |
685 | /* Posix systems expect timer values smaller than the resolution of |
686 | the system clock be rounded up to the clock resolution. First | |
687 | time we are called, measure the clock tick resolution. */ | |
688 | if (!clocks_min) | |
689 | { | |
6c16c13e | 690 | ULONGLONG t1, t2; |
c06c382a | 691 | |
6c16c13e EZ |
692 | for (t1 = w32_get_timer_time (NULL); |
693 | (t2 = w32_get_timer_time (NULL)) == t1; ) | |
c06c382a EZ |
694 | ; |
695 | clocks_min = t2 - t1; | |
696 | } | |
697 | ||
698 | if (ovalue) | |
6c16c13e | 699 | ptem = ovalue; |
c06c382a | 700 | else |
6c16c13e | 701 | ptem = &tem; |
c06c382a | 702 | |
6c16c13e EZ |
703 | if (getitimer (which, ptem)) /* also sets ticks_now */ |
704 | return -1; /* errno already set */ | |
c06c382a EZ |
705 | |
706 | t_expire = | |
707 | (which == ITIMER_REAL) ? &real_itimer.expire : &prof_itimer.expire; | |
708 | t_reload = | |
709 | (which == ITIMER_REAL) ? &real_itimer.reload : &prof_itimer.reload; | |
710 | ||
711 | crit = (which == ITIMER_REAL) ? &crit_real : &crit_prof; | |
712 | ||
713 | if (!value | |
714 | || (value->it_value.tv_sec == 0 && value->it_value.tv_usec == 0)) | |
715 | { | |
716 | EnterCriticalSection (crit); | |
717 | /* Disable the timer. */ | |
718 | *t_expire = 0; | |
719 | *t_reload = 0; | |
720 | LeaveCriticalSection (crit); | |
721 | return 0; | |
722 | } | |
723 | ||
640bf8ad | 724 | reload = value->it_interval.tv_sec * TIMER_TICKS_PER_SEC; |
c06c382a EZ |
725 | |
726 | usecs = value->it_interval.tv_usec; | |
727 | if (value->it_interval.tv_sec == 0 | |
640bf8ad | 728 | && usecs && usecs * TIMER_TICKS_PER_SEC < clocks_min * 1000000) |
c06c382a EZ |
729 | reload = clocks_min; |
730 | else | |
731 | { | |
640bf8ad | 732 | usecs *= TIMER_TICKS_PER_SEC; |
c06c382a EZ |
733 | reload += usecs / 1000000; |
734 | } | |
735 | ||
640bf8ad | 736 | expire = value->it_value.tv_sec * TIMER_TICKS_PER_SEC; |
c06c382a EZ |
737 | usecs = value->it_value.tv_usec; |
738 | if (value->it_value.tv_sec == 0 | |
640bf8ad | 739 | && usecs * TIMER_TICKS_PER_SEC < clocks_min * 1000000) |
c06c382a EZ |
740 | expire = clocks_min; |
741 | else | |
742 | { | |
640bf8ad | 743 | usecs *= TIMER_TICKS_PER_SEC; |
c06c382a EZ |
744 | expire += usecs / 1000000; |
745 | } | |
746 | ||
747 | expire += ticks_now; | |
748 | ||
749 | EnterCriticalSection (crit); | |
750 | expire_old = *t_expire; | |
751 | reload_old = *t_reload; | |
752 | if (!(expire == expire_old && reload == reload_old)) | |
753 | { | |
754 | *t_reload = reload; | |
755 | *t_expire = expire; | |
756 | } | |
757 | LeaveCriticalSection (crit); | |
758 | ||
759 | return start_timer_thread (which); | |
760 | } | |
761 | ||
762 | int | |
763 | alarm (int seconds) | |
764 | { | |
4cdfbb89 EZ |
765 | #ifdef HAVE_SETITIMER |
766 | struct itimerval new_values, old_values; | |
c06c382a EZ |
767 | |
768 | new_values.it_value.tv_sec = seconds; | |
769 | new_values.it_value.tv_usec = 0; | |
770 | new_values.it_interval.tv_sec = new_values.it_interval.tv_usec = 0; | |
771 | ||
4cdfbb89 EZ |
772 | if (setitimer (ITIMER_REAL, &new_values, &old_values) < 0) |
773 | return 0; | |
774 | return old_values.it_value.tv_sec; | |
775 | #else | |
c06c382a | 776 | return seconds; |
4cdfbb89 | 777 | #endif |
c06c382a EZ |
778 | } |
779 | ||
c519b5e1 GV |
780 | /* Defined in <process.h> which conflicts with the local copy */ |
781 | #define _P_NOWAIT 1 | |
782 | ||
783 | /* Child process management list. */ | |
784 | int child_proc_count = 0; | |
785 | child_process child_procs[ MAX_CHILDREN ]; | |
d4547511 | 786 | child_process *dead_child = NULL; |
c519b5e1 | 787 | |
24f981c9 | 788 | static DWORD WINAPI reader_thread (void *arg); |
c519b5e1 | 789 | |
6cdfb6e6 | 790 | /* Find an unused process slot. */ |
c519b5e1 | 791 | child_process * |
6cdfb6e6 RS |
792 | new_child (void) |
793 | { | |
794 | child_process *cp; | |
c519b5e1 | 795 | DWORD id; |
177c0ea7 | 796 | |
9d4f32e8 | 797 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
ae11bda5 | 798 | if (!CHILD_ACTIVE (cp)) |
e1dbe924 | 799 | goto Initialize; |
c519b5e1 GV |
800 | if (child_proc_count == MAX_CHILDREN) |
801 | return NULL; | |
802 | cp = &child_procs[child_proc_count++]; | |
803 | ||
e1dbe924 | 804 | Initialize: |
17ddfd15 EZ |
805 | /* Last opportunity to avoid leaking handles before we forget them |
806 | for good. */ | |
807 | if (cp->procinfo.hProcess) | |
808 | CloseHandle (cp->procinfo.hProcess); | |
809 | if (cp->procinfo.hThread) | |
810 | CloseHandle (cp->procinfo.hThread); | |
ed3751c8 | 811 | memset (cp, 0, sizeof (*cp)); |
c519b5e1 GV |
812 | cp->fd = -1; |
813 | cp->pid = -1; | |
814 | cp->procinfo.hProcess = NULL; | |
815 | cp->status = STATUS_READ_ERROR; | |
816 | ||
817 | /* use manual reset event so that select() will function properly */ | |
818 | cp->char_avail = CreateEvent (NULL, TRUE, FALSE, NULL); | |
819 | if (cp->char_avail) | |
820 | { | |
821 | cp->char_consumed = CreateEvent (NULL, FALSE, FALSE, NULL); | |
822 | if (cp->char_consumed) | |
823 | { | |
0d887c7d EZ |
824 | /* The 0x00010000 flag is STACK_SIZE_PARAM_IS_A_RESERVATION. |
825 | It means that the 64K stack we are requesting in the 2nd | |
826 | argument is how much memory should be reserved for the | |
827 | stack. If we don't use this flag, the memory requested | |
828 | by the 2nd argument is the amount actually _committed_, | |
829 | but Windows reserves 8MB of memory for each thread's | |
830 | stack. (The 8MB figure comes from the -stack | |
831 | command-line argument we pass to the linker when building | |
832 | Emacs, but that's because we need a large stack for | |
833 | Emacs's main thread.) Since we request 2GB of reserved | |
834 | memory at startup (see w32heap.c), which is close to the | |
835 | maximum memory available for a 32-bit process on Windows, | |
836 | the 8MB reservation for each thread causes failures in | |
837 | starting subprocesses, because we create a thread running | |
838 | reader_thread for each subprocess. As 8MB of stack is | |
839 | way too much for reader_thread, forcing Windows to | |
840 | reserve less wins the day. */ | |
841 | cp->thrd = CreateThread (NULL, 64 * 1024, reader_thread, cp, | |
842 | 0x00010000, &id); | |
c519b5e1 GV |
843 | if (cp->thrd) |
844 | return cp; | |
845 | } | |
846 | } | |
847 | delete_child (cp); | |
848 | return NULL; | |
849 | } | |
850 | ||
177c0ea7 | 851 | void |
c519b5e1 GV |
852 | delete_child (child_process *cp) |
853 | { | |
854 | int i; | |
855 | ||
856 | /* Should not be deleting a child that is still needed. */ | |
857 | for (i = 0; i < MAXDESC; i++) | |
858 | if (fd_info[i].cp == cp) | |
1088b922 | 859 | emacs_abort (); |
c519b5e1 | 860 | |
ae11bda5 | 861 | if (!CHILD_ACTIVE (cp)) |
c519b5e1 GV |
862 | return; |
863 | ||
864 | /* reap thread if necessary */ | |
865 | if (cp->thrd) | |
866 | { | |
867 | DWORD rc; | |
868 | ||
869 | if (GetExitCodeThread (cp->thrd, &rc) && rc == STILL_ACTIVE) | |
870 | { | |
871 | /* let the thread exit cleanly if possible */ | |
872 | cp->status = STATUS_READ_ERROR; | |
873 | SetEvent (cp->char_consumed); | |
a017b515 | 874 | #if 0 |
c5e87d10 | 875 | /* We used to forcibly terminate the thread here, but it |
a017b515 JR |
876 | is normally unnecessary, and in abnormal cases, the worst that |
877 | will happen is we have an extra idle thread hanging around | |
878 | waiting for the zombie process. */ | |
c519b5e1 GV |
879 | if (WaitForSingleObject (cp->thrd, 1000) != WAIT_OBJECT_0) |
880 | { | |
881 | DebPrint (("delete_child.WaitForSingleObject (thread) failed " | |
882 | "with %lu for fd %ld\n", GetLastError (), cp->fd)); | |
883 | TerminateThread (cp->thrd, 0); | |
884 | } | |
a017b515 | 885 | #endif |
c519b5e1 GV |
886 | } |
887 | CloseHandle (cp->thrd); | |
888 | cp->thrd = NULL; | |
889 | } | |
890 | if (cp->char_avail) | |
891 | { | |
892 | CloseHandle (cp->char_avail); | |
893 | cp->char_avail = NULL; | |
894 | } | |
895 | if (cp->char_consumed) | |
896 | { | |
897 | CloseHandle (cp->char_consumed); | |
898 | cp->char_consumed = NULL; | |
899 | } | |
900 | ||
901 | /* update child_proc_count (highest numbered slot in use plus one) */ | |
902 | if (cp == child_procs + child_proc_count - 1) | |
903 | { | |
904 | for (i = child_proc_count-1; i >= 0; i--) | |
ae11bda5 | 905 | if (CHILD_ACTIVE (&child_procs[i])) |
c519b5e1 GV |
906 | { |
907 | child_proc_count = i + 1; | |
908 | break; | |
909 | } | |
910 | } | |
911 | if (i < 0) | |
912 | child_proc_count = 0; | |
6cdfb6e6 RS |
913 | } |
914 | ||
915 | /* Find a child by pid. */ | |
916 | static child_process * | |
917 | find_child_pid (DWORD pid) | |
918 | { | |
919 | child_process *cp; | |
c519b5e1 | 920 | |
9d4f32e8 | 921 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
ae11bda5 | 922 | if (CHILD_ACTIVE (cp) && pid == cp->pid) |
6cdfb6e6 RS |
923 | return cp; |
924 | return NULL; | |
925 | } | |
926 | ||
6cdfb6e6 | 927 | |
c519b5e1 GV |
928 | /* Thread proc for child process and socket reader threads. Each thread |
929 | is normally blocked until woken by select() to check for input by | |
04bf5b65 | 930 | reading one char. When the read completes, char_avail is signaled |
c519b5e1 | 931 | to wake up the select emulator and the thread blocks itself again. */ |
24f981c9 | 932 | static DWORD WINAPI |
6cdfb6e6 RS |
933 | reader_thread (void *arg) |
934 | { | |
935 | child_process *cp; | |
177c0ea7 | 936 | |
6cdfb6e6 RS |
937 | /* Our identity */ |
938 | cp = (child_process *)arg; | |
177c0ea7 | 939 | |
6cdfb6e6 | 940 | /* We have to wait for the go-ahead before we can start */ |
b2fc9f3d | 941 | if (cp == NULL |
f067b8ec JB |
942 | || WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0 |
943 | || cp->fd < 0) | |
c519b5e1 GV |
944 | return 1; |
945 | ||
6cdfb6e6 RS |
946 | for (;;) |
947 | { | |
c519b5e1 GV |
948 | int rc; |
949 | ||
f9125cde KS |
950 | if (fd_info[cp->fd].flags & FILE_LISTEN) |
951 | rc = _sys_wait_accept (cp->fd); | |
952 | else | |
953 | rc = _sys_read_ahead (cp->fd); | |
c519b5e1 GV |
954 | |
955 | /* The name char_avail is a misnomer - it really just means the | |
956 | read-ahead has completed, whether successfully or not. */ | |
6cdfb6e6 RS |
957 | if (!SetEvent (cp->char_avail)) |
958 | { | |
ef862e20 EZ |
959 | DebPrint (("reader_thread.SetEvent(0x%x) failed with %lu for fd %ld (PID %d)\n", |
960 | (DWORD_PTR)cp->char_avail, GetLastError (), | |
961 | cp->fd, cp->pid)); | |
c519b5e1 GV |
962 | return 1; |
963 | } | |
964 | ||
965 | if (rc == STATUS_READ_ERROR) | |
966 | return 1; | |
177c0ea7 | 967 | |
6cdfb6e6 | 968 | /* If the read died, the child has died so let the thread die */ |
c519b5e1 | 969 | if (rc == STATUS_READ_FAILED) |
6cdfb6e6 | 970 | break; |
177c0ea7 | 971 | |
6cdfb6e6 RS |
972 | /* Wait until our input is acknowledged before reading again */ |
973 | if (WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0) | |
974 | { | |
975 | DebPrint (("reader_thread.WaitForSingleObject failed with " | |
976 | "%lu for fd %ld\n", GetLastError (), cp->fd)); | |
977 | break; | |
978 | } | |
979 | } | |
980 | return 0; | |
981 | } | |
982 | ||
b2fc9f3d GV |
983 | /* To avoid Emacs changing directory, we just record here the directory |
984 | the new process should start in. This is set just before calling | |
985 | sys_spawnve, and is not generally valid at any other time. */ | |
986 | static char * process_dir; | |
987 | ||
177c0ea7 | 988 | static BOOL |
a55a5f3c | 989 | create_child (char *exe, char *cmdline, char *env, int is_gui_app, |
c519b5e1 | 990 | int * pPid, child_process *cp) |
6cdfb6e6 | 991 | { |
6cdfb6e6 RS |
992 | STARTUPINFO start; |
993 | SECURITY_ATTRIBUTES sec_attrs; | |
42c95ffb | 994 | #if 0 |
6cdfb6e6 | 995 | SECURITY_DESCRIPTOR sec_desc; |
42c95ffb | 996 | #endif |
82e7c0a9 | 997 | DWORD flags; |
b2fc9f3d | 998 | char dir[ MAXPATHLEN ]; |
177c0ea7 | 999 | |
1088b922 | 1000 | if (cp == NULL) emacs_abort (); |
177c0ea7 | 1001 | |
6cdfb6e6 RS |
1002 | memset (&start, 0, sizeof (start)); |
1003 | start.cb = sizeof (start); | |
177c0ea7 | 1004 | |
58d4e829 | 1005 | #ifdef HAVE_NTGUI |
a55a5f3c | 1006 | if (NILP (Vw32_start_process_show_window) && !is_gui_app) |
0ecf7d36 RS |
1007 | start.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; |
1008 | else | |
1009 | start.dwFlags = STARTF_USESTDHANDLES; | |
58d4e829 GV |
1010 | start.wShowWindow = SW_HIDE; |
1011 | ||
1012 | start.hStdInput = GetStdHandle (STD_INPUT_HANDLE); | |
1013 | start.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE); | |
1014 | start.hStdError = GetStdHandle (STD_ERROR_HANDLE); | |
1015 | #endif /* HAVE_NTGUI */ | |
1016 | ||
42c95ffb | 1017 | #if 0 |
6cdfb6e6 RS |
1018 | /* Explicitly specify no security */ |
1019 | if (!InitializeSecurityDescriptor (&sec_desc, SECURITY_DESCRIPTOR_REVISION)) | |
c519b5e1 | 1020 | goto EH_Fail; |
6cdfb6e6 | 1021 | if (!SetSecurityDescriptorDacl (&sec_desc, TRUE, NULL, FALSE)) |
c519b5e1 | 1022 | goto EH_Fail; |
42c95ffb | 1023 | #endif |
6cdfb6e6 | 1024 | sec_attrs.nLength = sizeof (sec_attrs); |
42c95ffb | 1025 | sec_attrs.lpSecurityDescriptor = NULL /* &sec_desc */; |
6cdfb6e6 | 1026 | sec_attrs.bInheritHandle = FALSE; |
177c0ea7 | 1027 | |
b2fc9f3d GV |
1028 | strcpy (dir, process_dir); |
1029 | unixtodos_filename (dir); | |
82e7c0a9 AI |
1030 | |
1031 | flags = (!NILP (Vw32_start_process_share_console) | |
1032 | ? CREATE_NEW_PROCESS_GROUP | |
1033 | : CREATE_NEW_CONSOLE); | |
1034 | if (NILP (Vw32_start_process_inherit_error_mode)) | |
1035 | flags |= CREATE_DEFAULT_ERROR_MODE; | |
6cdfb6e6 | 1036 | if (!CreateProcess (exe, cmdline, &sec_attrs, NULL, TRUE, |
82e7c0a9 | 1037 | flags, env, dir, &start, &cp->procinfo)) |
c519b5e1 GV |
1038 | goto EH_Fail; |
1039 | ||
1040 | cp->pid = (int) cp->procinfo.dwProcessId; | |
1041 | ||
1042 | /* Hack for Windows 95, which assigns large (ie negative) pids */ | |
1043 | if (cp->pid < 0) | |
1044 | cp->pid = -cp->pid; | |
1045 | ||
d4547511 PE |
1046 | /* pid must fit in a Lisp_Int */ |
1047 | cp->pid = cp->pid & INTMASK; | |
1048 | ||
c519b5e1 | 1049 | *pPid = cp->pid; |
b2fc9f3d | 1050 | |
6cdfb6e6 | 1051 | return TRUE; |
b2fc9f3d | 1052 | |
6cdfb6e6 | 1053 | EH_Fail: |
ed3751c8 | 1054 | DebPrint (("create_child.CreateProcess failed: %ld\n", GetLastError ());); |
6cdfb6e6 RS |
1055 | return FALSE; |
1056 | } | |
1057 | ||
1058 | /* create_child doesn't know what emacs' file handle will be for waiting | |
1059 | on output from the child, so we need to make this additional call | |
1060 | to register the handle with the process | |
1061 | This way the select emulator knows how to match file handles with | |
1062 | entries in child_procs. */ | |
177c0ea7 | 1063 | void |
6cdfb6e6 RS |
1064 | register_child (int pid, int fd) |
1065 | { | |
1066 | child_process *cp; | |
177c0ea7 | 1067 | |
6cdfb6e6 RS |
1068 | cp = find_child_pid (pid); |
1069 | if (cp == NULL) | |
1070 | { | |
1071 | DebPrint (("register_child unable to find pid %lu\n", pid)); | |
1072 | return; | |
1073 | } | |
177c0ea7 | 1074 | |
6cdfb6e6 RS |
1075 | #ifdef FULL_DEBUG |
1076 | DebPrint (("register_child registered fd %d with pid %lu\n", fd, pid)); | |
1077 | #endif | |
177c0ea7 | 1078 | |
6cdfb6e6 | 1079 | cp->fd = fd; |
6cdfb6e6 | 1080 | |
c519b5e1 GV |
1081 | /* thread is initially blocked until select is called; set status so |
1082 | that select will release thread */ | |
1083 | cp->status = STATUS_READ_ACKNOWLEDGED; | |
1084 | ||
1085 | /* attach child_process to fd_info */ | |
1086 | if (fd_info[fd].cp != NULL) | |
6cdfb6e6 | 1087 | { |
c519b5e1 | 1088 | DebPrint (("register_child: fd_info[%d] apparently in use!\n", fd)); |
1088b922 | 1089 | emacs_abort (); |
6cdfb6e6 | 1090 | } |
c519b5e1 GV |
1091 | |
1092 | fd_info[fd].cp = cp; | |
6cdfb6e6 RS |
1093 | } |
1094 | ||
1095 | /* When a process dies its pipe will break so the reader thread will | |
1096 | signal failure to the select emulator. | |
1097 | The select emulator then calls this routine to clean up. | |
1098 | Since the thread signaled failure we can assume it is exiting. */ | |
177c0ea7 | 1099 | static void |
c519b5e1 | 1100 | reap_subprocess (child_process *cp) |
6cdfb6e6 | 1101 | { |
c519b5e1 | 1102 | if (cp->procinfo.hProcess) |
6cdfb6e6 | 1103 | { |
c519b5e1 | 1104 | /* Reap the process */ |
b2fc9f3d GV |
1105 | #ifdef FULL_DEBUG |
1106 | /* Process should have already died before we are called. */ | |
1107 | if (WaitForSingleObject (cp->procinfo.hProcess, 0) != WAIT_OBJECT_0) | |
1108 | DebPrint (("reap_subprocess: child fpr fd %d has not died yet!", cp->fd)); | |
1109 | #endif | |
c519b5e1 GV |
1110 | CloseHandle (cp->procinfo.hProcess); |
1111 | cp->procinfo.hProcess = NULL; | |
1112 | CloseHandle (cp->procinfo.hThread); | |
1113 | cp->procinfo.hThread = NULL; | |
6cdfb6e6 | 1114 | } |
c519b5e1 GV |
1115 | |
1116 | /* For asynchronous children, the child_proc resources will be freed | |
1117 | when the last pipe read descriptor is closed; for synchronous | |
1118 | children, we must explicitly free the resources now because | |
1119 | register_child has not been called. */ | |
1120 | if (cp->fd == -1) | |
1121 | delete_child (cp); | |
6cdfb6e6 RS |
1122 | } |
1123 | ||
d4547511 PE |
1124 | /* Wait for any of our existing child processes to die |
1125 | When it does, close its handle | |
1126 | Return the pid and fill in the status if non-NULL. */ | |
22759c72 | 1127 | |
d4547511 PE |
1128 | int |
1129 | sys_wait (int *status) | |
6cdfb6e6 RS |
1130 | { |
1131 | DWORD active, retval; | |
1132 | int nh; | |
d4547511 | 1133 | int pid; |
6cdfb6e6 RS |
1134 | child_process *cp, *cps[MAX_CHILDREN]; |
1135 | HANDLE wait_hnd[MAX_CHILDREN]; | |
177c0ea7 | 1136 | |
6cdfb6e6 | 1137 | nh = 0; |
d4547511 | 1138 | if (dead_child != NULL) |
6cdfb6e6 | 1139 | { |
d4547511 PE |
1140 | /* We want to wait for a specific child */ |
1141 | wait_hnd[nh] = dead_child->procinfo.hProcess; | |
1142 | cps[nh] = dead_child; | |
1143 | if (!wait_hnd[nh]) emacs_abort (); | |
1144 | nh++; | |
1145 | active = 0; | |
1146 | goto get_result; | |
6cdfb6e6 RS |
1147 | } |
1148 | else | |
1149 | { | |
9d4f32e8 | 1150 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
d4547511 PE |
1151 | /* some child_procs might be sockets; ignore them */ |
1152 | if (CHILD_ACTIVE (cp) && cp->procinfo.hProcess | |
1153 | && (cp->fd < 0 || (fd_info[cp->fd].flags & FILE_AT_EOF) != 0)) | |
1154 | { | |
1155 | wait_hnd[nh] = cp->procinfo.hProcess; | |
1156 | cps[nh] = cp; | |
1157 | nh++; | |
1158 | } | |
6cdfb6e6 | 1159 | } |
177c0ea7 | 1160 | |
d4547511 PE |
1161 | if (nh == 0) |
1162 | { | |
1163 | /* Nothing to wait on, so fail */ | |
1164 | errno = ECHILD; | |
1165 | return -1; | |
1166 | } | |
b2fc9f3d GV |
1167 | |
1168 | do | |
1169 | { | |
d4547511 | 1170 | /* Check for quit about once a second. */ |
b2fc9f3d | 1171 | QUIT; |
d4547511 | 1172 | active = WaitForMultipleObjects (nh, wait_hnd, FALSE, 1000); |
b2fc9f3d GV |
1173 | } while (active == WAIT_TIMEOUT); |
1174 | ||
6cdfb6e6 RS |
1175 | if (active == WAIT_FAILED) |
1176 | { | |
1177 | errno = EBADF; | |
1178 | return -1; | |
1179 | } | |
b2fc9f3d GV |
1180 | else if (active >= WAIT_OBJECT_0 |
1181 | && active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS) | |
6cdfb6e6 RS |
1182 | { |
1183 | active -= WAIT_OBJECT_0; | |
1184 | } | |
b2fc9f3d GV |
1185 | else if (active >= WAIT_ABANDONED_0 |
1186 | && active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS) | |
6cdfb6e6 RS |
1187 | { |
1188 | active -= WAIT_ABANDONED_0; | |
1189 | } | |
b2fc9f3d | 1190 | else |
1088b922 | 1191 | emacs_abort (); |
b2fc9f3d GV |
1192 | |
1193 | get_result: | |
6cdfb6e6 RS |
1194 | if (!GetExitCodeProcess (wait_hnd[active], &retval)) |
1195 | { | |
1196 | DebPrint (("Wait.GetExitCodeProcess failed with %lu\n", | |
1197 | GetLastError ())); | |
1198 | retval = 1; | |
1199 | } | |
1200 | if (retval == STILL_ACTIVE) | |
1201 | { | |
d4547511 | 1202 | /* Should never happen */ |
6cdfb6e6 RS |
1203 | DebPrint (("Wait.WaitForMultipleObjects returned an active process\n")); |
1204 | errno = EINVAL; | |
1205 | return -1; | |
1206 | } | |
bc69349b RS |
1207 | |
1208 | /* Massage the exit code from the process to match the format expected | |
8e6208c5 | 1209 | by the WIFSTOPPED et al macros in syswait.h. Only WIFSIGNALED and |
bc69349b RS |
1210 | WIFEXITED are supported; WIFSTOPPED doesn't make sense under NT. */ |
1211 | ||
1212 | if (retval == STATUS_CONTROL_C_EXIT) | |
1213 | retval = SIGINT; | |
1214 | else | |
1215 | retval <<= 8; | |
177c0ea7 | 1216 | |
6cdfb6e6 | 1217 | cp = cps[active]; |
c519b5e1 GV |
1218 | pid = cp->pid; |
1219 | #ifdef FULL_DEBUG | |
1220 | DebPrint (("Wait signaled with process pid %d\n", cp->pid)); | |
1221 | #endif | |
22759c72 | 1222 | |
6cdfb6e6 RS |
1223 | if (status) |
1224 | { | |
22759c72 KH |
1225 | *status = retval; |
1226 | } | |
1227 | else if (synch_process_alive) | |
1228 | { | |
1229 | synch_process_alive = 0; | |
22759c72 | 1230 | |
3d7eead0 GV |
1231 | /* Report the status of the synchronous process. */ |
1232 | if (WIFEXITED (retval)) | |
13294f95 | 1233 | synch_process_retcode = WEXITSTATUS (retval); |
3d7eead0 GV |
1234 | else if (WIFSIGNALED (retval)) |
1235 | { | |
1236 | int code = WTERMSIG (retval); | |
d8ab37a8 | 1237 | const char *signame; |
68c45bf0 | 1238 | |
ca9c0567 | 1239 | synchronize_system_messages_locale (); |
68c45bf0 PE |
1240 | signame = strsignal (code); |
1241 | ||
3d7eead0 GV |
1242 | if (signame == 0) |
1243 | signame = "unknown"; | |
1244 | ||
1245 | synch_process_death = signame; | |
1246 | } | |
c519b5e1 GV |
1247 | |
1248 | reap_subprocess (cp); | |
6cdfb6e6 | 1249 | } |
b2fc9f3d GV |
1250 | |
1251 | reap_subprocess (cp); | |
177c0ea7 | 1252 | |
c519b5e1 | 1253 | return pid; |
6cdfb6e6 RS |
1254 | } |
1255 | ||
75be5258 EZ |
1256 | /* Old versions of w32api headers don't have separate 32-bit and |
1257 | 64-bit defines, but the one they have matches the 32-bit variety. */ | |
1258 | #ifndef IMAGE_NT_OPTIONAL_HDR32_MAGIC | |
1259 | # define IMAGE_NT_OPTIONAL_HDR32_MAGIC IMAGE_NT_OPTIONAL_HDR_MAGIC | |
1260 | # define IMAGE_OPTIONAL_HEADER32 IMAGE_OPTIONAL_HEADER | |
1261 | #endif | |
1262 | ||
24f981c9 | 1263 | static void |
b56ceb92 JB |
1264 | w32_executable_type (char * filename, |
1265 | int * is_dos_app, | |
1266 | int * is_cygnus_app, | |
1267 | int * is_gui_app) | |
817abdf6 | 1268 | { |
b2fc9f3d GV |
1269 | file_data executable; |
1270 | char * p; | |
177c0ea7 | 1271 | |
b2fc9f3d GV |
1272 | /* Default values in case we can't tell for sure. */ |
1273 | *is_dos_app = FALSE; | |
1274 | *is_cygnus_app = FALSE; | |
a55a5f3c | 1275 | *is_gui_app = FALSE; |
b2fc9f3d GV |
1276 | |
1277 | if (!open_input_file (&executable, filename)) | |
1278 | return; | |
817abdf6 | 1279 | |
b2fc9f3d | 1280 | p = strrchr (filename, '.'); |
177c0ea7 | 1281 | |
b2fc9f3d | 1282 | /* We can only identify DOS .com programs from the extension. */ |
05131107 | 1283 | if (p && xstrcasecmp (p, ".com") == 0) |
b2fc9f3d | 1284 | *is_dos_app = TRUE; |
05131107 JR |
1285 | else if (p && (xstrcasecmp (p, ".bat") == 0 |
1286 | || xstrcasecmp (p, ".cmd") == 0)) | |
b2fc9f3d GV |
1287 | { |
1288 | /* A DOS shell script - it appears that CreateProcess is happy to | |
1289 | accept this (somewhat surprisingly); presumably it looks at | |
1290 | COMSPEC to determine what executable to actually invoke. | |
1291 | Therefore, we have to do the same here as well. */ | |
1292 | /* Actually, I think it uses the program association for that | |
1293 | extension, which is defined in the registry. */ | |
1294 | p = egetenv ("COMSPEC"); | |
1295 | if (p) | |
a55a5f3c | 1296 | w32_executable_type (p, is_dos_app, is_cygnus_app, is_gui_app); |
b2fc9f3d GV |
1297 | } |
1298 | else | |
817abdf6 | 1299 | { |
b2fc9f3d GV |
1300 | /* Look for DOS .exe signature - if found, we must also check that |
1301 | it isn't really a 16- or 32-bit Windows exe, since both formats | |
1302 | start with a DOS program stub. Note that 16-bit Windows | |
1303 | executables use the OS/2 1.x format. */ | |
817abdf6 | 1304 | |
b2fc9f3d GV |
1305 | IMAGE_DOS_HEADER * dos_header; |
1306 | IMAGE_NT_HEADERS * nt_header; | |
1307 | ||
1308 | dos_header = (PIMAGE_DOS_HEADER) executable.file_base; | |
1309 | if (dos_header->e_magic != IMAGE_DOS_SIGNATURE) | |
1310 | goto unwind; | |
1311 | ||
62aba0d4 | 1312 | nt_header = (PIMAGE_NT_HEADERS) ((unsigned char *) dos_header + dos_header->e_lfanew); |
b2fc9f3d | 1313 | |
177c0ea7 | 1314 | if ((char *) nt_header > (char *) dos_header + executable.size) |
817abdf6 | 1315 | { |
b2fc9f3d GV |
1316 | /* Some dos headers (pkunzip) have bogus e_lfanew fields. */ |
1317 | *is_dos_app = TRUE; | |
177c0ea7 | 1318 | } |
b2fc9f3d GV |
1319 | else if (nt_header->Signature != IMAGE_NT_SIGNATURE |
1320 | && LOWORD (nt_header->Signature) != IMAGE_OS2_SIGNATURE) | |
1321 | { | |
1322 | *is_dos_app = TRUE; | |
1323 | } | |
1324 | else if (nt_header->Signature == IMAGE_NT_SIGNATURE) | |
1325 | { | |
2b6e2f4d JR |
1326 | IMAGE_DATA_DIRECTORY *data_dir = NULL; |
1327 | if (nt_header->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC) | |
1328 | { | |
1329 | /* Ensure we are using the 32 bit structure. */ | |
1330 | IMAGE_OPTIONAL_HEADER32 *opt | |
1331 | = (IMAGE_OPTIONAL_HEADER32*) &(nt_header->OptionalHeader); | |
1332 | data_dir = opt->DataDirectory; | |
1333 | *is_gui_app = (opt->Subsystem == IMAGE_SUBSYSTEM_WINDOWS_GUI); | |
1334 | } | |
1335 | /* MingW 3.12 has the required 64 bit structs, but in case older | |
1336 | versions don't, only check 64 bit exes if we know how. */ | |
1337 | #ifdef IMAGE_NT_OPTIONAL_HDR64_MAGIC | |
1338 | else if (nt_header->OptionalHeader.Magic | |
1339 | == IMAGE_NT_OPTIONAL_HDR64_MAGIC) | |
1340 | { | |
1341 | IMAGE_OPTIONAL_HEADER64 *opt | |
1342 | = (IMAGE_OPTIONAL_HEADER64*) &(nt_header->OptionalHeader); | |
1343 | data_dir = opt->DataDirectory; | |
1344 | *is_gui_app = (opt->Subsystem == IMAGE_SUBSYSTEM_WINDOWS_GUI); | |
1345 | } | |
1346 | #endif | |
1347 | if (data_dir) | |
1348 | { | |
1349 | /* Look for cygwin.dll in DLL import list. */ | |
1350 | IMAGE_DATA_DIRECTORY import_dir = | |
1351 | data_dir[IMAGE_DIRECTORY_ENTRY_IMPORT]; | |
1352 | IMAGE_IMPORT_DESCRIPTOR * imports; | |
1353 | IMAGE_SECTION_HEADER * section; | |
1354 | ||
1355 | section = rva_to_section (import_dir.VirtualAddress, nt_header); | |
1356 | imports = RVA_TO_PTR (import_dir.VirtualAddress, section, | |
1357 | executable); | |
1358 | ||
1359 | for ( ; imports->Name; imports++) | |
1360 | { | |
1361 | char * dllname = RVA_TO_PTR (imports->Name, section, | |
1362 | executable); | |
35f36d65 | 1363 | |
2b6e2f4d JR |
1364 | /* The exact name of the cygwin dll has changed with |
1365 | various releases, but hopefully this will be reasonably | |
1366 | future proof. */ | |
1367 | if (strncmp (dllname, "cygwin", 6) == 0) | |
1368 | { | |
1369 | *is_cygnus_app = TRUE; | |
1370 | break; | |
1371 | } | |
1372 | } | |
1373 | } | |
b2fc9f3d | 1374 | } |
817abdf6 | 1375 | } |
177c0ea7 | 1376 | |
b2fc9f3d GV |
1377 | unwind: |
1378 | close_file_data (&executable); | |
817abdf6 KH |
1379 | } |
1380 | ||
24f981c9 | 1381 | static int |
42c95ffb | 1382 | compare_env (const void *strp1, const void *strp2) |
d9709fde | 1383 | { |
42c95ffb | 1384 | const char *str1 = *(const char **)strp1, *str2 = *(const char **)strp2; |
d9709fde GV |
1385 | |
1386 | while (*str1 && *str2 && *str1 != '=' && *str2 != '=') | |
1387 | { | |
11c22fff AI |
1388 | /* Sort order in command.com/cmd.exe is based on uppercasing |
1389 | names, so do the same here. */ | |
1390 | if (toupper (*str1) > toupper (*str2)) | |
d9709fde | 1391 | return 1; |
11c22fff | 1392 | else if (toupper (*str1) < toupper (*str2)) |
d9709fde GV |
1393 | return -1; |
1394 | str1++, str2++; | |
1395 | } | |
1396 | ||
1397 | if (*str1 == '=' && *str2 == '=') | |
1398 | return 0; | |
1399 | else if (*str1 == '=') | |
1400 | return -1; | |
1401 | else | |
1402 | return 1; | |
1403 | } | |
1404 | ||
24f981c9 | 1405 | static void |
d9709fde GV |
1406 | merge_and_sort_env (char **envp1, char **envp2, char **new_envp) |
1407 | { | |
1408 | char **optr, **nptr; | |
1409 | int num; | |
1410 | ||
1411 | nptr = new_envp; | |
1412 | optr = envp1; | |
1413 | while (*optr) | |
1414 | *nptr++ = *optr++; | |
1415 | num = optr - envp1; | |
1416 | ||
1417 | optr = envp2; | |
1418 | while (*optr) | |
1419 | *nptr++ = *optr++; | |
1420 | num += optr - envp2; | |
1421 | ||
1422 | qsort (new_envp, num, sizeof (char *), compare_env); | |
1423 | ||
1424 | *nptr = NULL; | |
1425 | } | |
6cdfb6e6 RS |
1426 | |
1427 | /* When a new child process is created we need to register it in our list, | |
1428 | so intercept spawn requests. */ | |
177c0ea7 | 1429 | int |
c519b5e1 | 1430 | sys_spawnve (int mode, char *cmdname, char **argv, char **envp) |
6cdfb6e6 | 1431 | { |
0a4de642 | 1432 | Lisp_Object program, full; |
6cdfb6e6 | 1433 | char *cmdline, *env, *parg, **targ; |
d9709fde | 1434 | int arglen, numenv; |
c519b5e1 GV |
1435 | int pid; |
1436 | child_process *cp; | |
a55a5f3c | 1437 | int is_dos_app, is_cygnus_app, is_gui_app; |
b2fc9f3d | 1438 | int do_quoting = 0; |
d9709fde GV |
1439 | /* We pass our process ID to our children by setting up an environment |
1440 | variable in their environment. */ | |
1441 | char ppid_env_var_buffer[64]; | |
1442 | char *extra_env[] = {ppid_env_var_buffer, NULL}; | |
0a7a6051 JR |
1443 | /* These are the characters that cause an argument to need quoting. |
1444 | Arguments with whitespace characters need quoting to prevent the | |
1445 | argument being split into two or more. Arguments with wildcards | |
1446 | are also quoted, for consistency with posix platforms, where wildcards | |
1447 | are not expanded if we run the program directly without a shell. | |
1448 | Some extra whitespace characters need quoting in Cygwin programs, | |
1449 | so this list is conditionally modified below. */ | |
1450 | char *sepchars = " \t*?"; | |
18a80473 EZ |
1451 | /* This is for native w32 apps; modified below for Cygwin apps. */ |
1452 | char escape_char = '\\'; | |
d9709fde | 1453 | |
c519b5e1 GV |
1454 | /* We don't care about the other modes */ |
1455 | if (mode != _P_NOWAIT) | |
1456 | { | |
1457 | errno = EINVAL; | |
1458 | return -1; | |
1459 | } | |
0a4de642 RS |
1460 | |
1461 | /* Handle executable names without an executable suffix. */ | |
1130ecfc | 1462 | program = build_string (cmdname); |
0a4de642 RS |
1463 | if (NILP (Ffile_executable_p (program))) |
1464 | { | |
1465 | struct gcpro gcpro1; | |
177c0ea7 | 1466 | |
0a4de642 RS |
1467 | full = Qnil; |
1468 | GCPRO1 (program); | |
44c7a526 | 1469 | openp (Vexec_path, program, Vexec_suffixes, &full, make_number (X_OK)); |
0a4de642 RS |
1470 | UNGCPRO; |
1471 | if (NILP (full)) | |
1472 | { | |
1473 | errno = EINVAL; | |
1474 | return -1; | |
1475 | } | |
b2fc9f3d | 1476 | program = full; |
0a4de642 RS |
1477 | } |
1478 | ||
b2fc9f3d | 1479 | /* make sure argv[0] and cmdname are both in DOS format */ |
d5db4077 | 1480 | cmdname = SDATA (program); |
c519b5e1 GV |
1481 | unixtodos_filename (cmdname); |
1482 | argv[0] = cmdname; | |
817abdf6 | 1483 | |
b46a6a83 | 1484 | /* Determine whether program is a 16-bit DOS executable, or a 32-bit Windows |
b2fc9f3d GV |
1485 | executable that is implicitly linked to the Cygnus dll (implying it |
1486 | was compiled with the Cygnus GNU toolchain and hence relies on | |
1487 | cygwin.dll to parse the command line - we use this to decide how to | |
a55a5f3c AI |
1488 | escape quote chars in command line args that must be quoted). |
1489 | ||
1490 | Also determine whether it is a GUI app, so that we don't hide its | |
1491 | initial window unless specifically requested. */ | |
1492 | w32_executable_type (cmdname, &is_dos_app, &is_cygnus_app, &is_gui_app); | |
b2fc9f3d GV |
1493 | |
1494 | /* On Windows 95, if cmdname is a DOS app, we invoke a helper | |
1495 | application to start it by specifying the helper app as cmdname, | |
1496 | while leaving the real app name as argv[0]. */ | |
1497 | if (is_dos_app) | |
817abdf6 | 1498 | { |
b2fc9f3d GV |
1499 | cmdname = alloca (MAXPATHLEN); |
1500 | if (egetenv ("CMDPROXY")) | |
1501 | strcpy (cmdname, egetenv ("CMDPROXY")); | |
1502 | else | |
1503 | { | |
d5db4077 | 1504 | strcpy (cmdname, SDATA (Vinvocation_directory)); |
b2fc9f3d GV |
1505 | strcat (cmdname, "cmdproxy.exe"); |
1506 | } | |
1507 | unixtodos_filename (cmdname); | |
817abdf6 | 1508 | } |
177c0ea7 | 1509 | |
6cdfb6e6 RS |
1510 | /* we have to do some conjuring here to put argv and envp into the |
1511 | form CreateProcess wants... argv needs to be a space separated/null | |
1512 | terminated list of parameters, and envp is a null | |
1513 | separated/double-null terminated list of parameters. | |
c519b5e1 | 1514 | |
b2fc9f3d GV |
1515 | Additionally, zero-length args and args containing whitespace or |
1516 | quote chars need to be wrapped in double quotes - for this to work, | |
1517 | embedded quotes need to be escaped as well. The aim is to ensure | |
1518 | the child process reconstructs the argv array we start with | |
1519 | exactly, so we treat quotes at the beginning and end of arguments | |
1520 | as embedded quotes. | |
1521 | ||
ef79fbba | 1522 | The w32 GNU-based library from Cygnus doubles quotes to escape |
b2fc9f3d | 1523 | them, while MSVC uses backslash for escaping. (Actually the MSVC |
e1dbe924 | 1524 | startup code does attempt to recognize doubled quotes and accept |
b2fc9f3d GV |
1525 | them, but gets it wrong and ends up requiring three quotes to get a |
1526 | single embedded quote!) So by default we decide whether to use | |
1527 | quote or backslash as the escape character based on whether the | |
1528 | binary is apparently a Cygnus compiled app. | |
1529 | ||
1530 | Note that using backslash to escape embedded quotes requires | |
1531 | additional special handling if an embedded quote is already | |
97610156 | 1532 | preceded by backslash, or if an arg requiring quoting ends with |
b2fc9f3d GV |
1533 | backslash. In such cases, the run of escape characters needs to be |
1534 | doubled. For consistency, we apply this special handling as long | |
1535 | as the escape character is not quote. | |
1536 | ||
1537 | Since we have no idea how large argv and envp are likely to be we | |
1538 | figure out list lengths on the fly and allocate them. */ | |
1539 | ||
1540 | if (!NILP (Vw32_quote_process_args)) | |
1541 | { | |
1542 | do_quoting = 1; | |
1543 | /* Override escape char by binding w32-quote-process-args to | |
1544 | desired character, or use t for auto-selection. */ | |
1545 | if (INTEGERP (Vw32_quote_process_args)) | |
1546 | escape_char = XINT (Vw32_quote_process_args); | |
1547 | else | |
1548 | escape_char = is_cygnus_app ? '"' : '\\'; | |
1549 | } | |
177c0ea7 | 1550 | |
9d4f32e8 | 1551 | /* Cygwin apps needs quoting a bit more often. */ |
dbb70029 GM |
1552 | if (escape_char == '"') |
1553 | sepchars = "\r\n\t\f '"; | |
1554 | ||
6cdfb6e6 RS |
1555 | /* do argv... */ |
1556 | arglen = 0; | |
1557 | targ = argv; | |
1558 | while (*targ) | |
1559 | { | |
c519b5e1 | 1560 | char * p = *targ; |
b2fc9f3d GV |
1561 | int need_quotes = 0; |
1562 | int escape_char_run = 0; | |
c519b5e1 GV |
1563 | |
1564 | if (*p == 0) | |
b2fc9f3d GV |
1565 | need_quotes = 1; |
1566 | for ( ; *p; p++) | |
1567 | { | |
dbb70029 GM |
1568 | if (escape_char == '"' && *p == '\\') |
1569 | /* If it's a Cygwin app, \ needs to be escaped. */ | |
1570 | arglen++; | |
1571 | else if (*p == '"') | |
b2fc9f3d GV |
1572 | { |
1573 | /* allow for embedded quotes to be escaped */ | |
1574 | arglen++; | |
1575 | need_quotes = 1; | |
1576 | /* handle the case where the embedded quote is already escaped */ | |
1577 | if (escape_char_run > 0) | |
1578 | { | |
1579 | /* To preserve the arg exactly, we need to double the | |
1580 | preceding escape characters (plus adding one to | |
1581 | escape the quote character itself). */ | |
1582 | arglen += escape_char_run; | |
1583 | } | |
1584 | } | |
dbb70029 | 1585 | else if (strchr (sepchars, *p) != NULL) |
b2fc9f3d GV |
1586 | { |
1587 | need_quotes = 1; | |
1588 | } | |
1589 | ||
1590 | if (*p == escape_char && escape_char != '"') | |
1591 | escape_char_run++; | |
1592 | else | |
1593 | escape_char_run = 0; | |
1594 | } | |
1595 | if (need_quotes) | |
1596 | { | |
1597 | arglen += 2; | |
1598 | /* handle the case where the arg ends with an escape char - we | |
1599 | must not let the enclosing quote be escaped. */ | |
1600 | if (escape_char_run > 0) | |
1601 | arglen += escape_char_run; | |
1602 | } | |
6cdfb6e6 RS |
1603 | arglen += strlen (*targ++) + 1; |
1604 | } | |
c519b5e1 | 1605 | cmdline = alloca (arglen); |
6cdfb6e6 RS |
1606 | targ = argv; |
1607 | parg = cmdline; | |
1608 | while (*targ) | |
1609 | { | |
c519b5e1 | 1610 | char * p = *targ; |
b2fc9f3d | 1611 | int need_quotes = 0; |
c519b5e1 GV |
1612 | |
1613 | if (*p == 0) | |
b2fc9f3d | 1614 | need_quotes = 1; |
93fdf2f8 | 1615 | |
b2fc9f3d | 1616 | if (do_quoting) |
93fdf2f8 | 1617 | { |
93fdf2f8 | 1618 | for ( ; *p; p++) |
dbb70029 | 1619 | if ((strchr (sepchars, *p) != NULL) || *p == '"') |
b2fc9f3d | 1620 | need_quotes = 1; |
93fdf2f8 | 1621 | } |
b2fc9f3d | 1622 | if (need_quotes) |
c519b5e1 | 1623 | { |
b2fc9f3d | 1624 | int escape_char_run = 0; |
c519b5e1 GV |
1625 | char * first; |
1626 | char * last; | |
1627 | ||
1628 | p = *targ; | |
1629 | first = p; | |
1630 | last = p + strlen (p) - 1; | |
1631 | *parg++ = '"'; | |
b2fc9f3d GV |
1632 | #if 0 |
1633 | /* This version does not escape quotes if they occur at the | |
1634 | beginning or end of the arg - this could lead to incorrect | |
fffa137c | 1635 | behavior when the arg itself represents a command line |
b2fc9f3d GV |
1636 | containing quoted args. I believe this was originally done |
1637 | as a hack to make some things work, before | |
1638 | `w32-quote-process-args' was added. */ | |
c519b5e1 GV |
1639 | while (*p) |
1640 | { | |
1641 | if (*p == '"' && p > first && p < last) | |
b2fc9f3d | 1642 | *parg++ = escape_char; /* escape embedded quotes */ |
c519b5e1 GV |
1643 | *parg++ = *p++; |
1644 | } | |
b2fc9f3d GV |
1645 | #else |
1646 | for ( ; *p; p++) | |
1647 | { | |
1648 | if (*p == '"') | |
1649 | { | |
1650 | /* double preceding escape chars if any */ | |
1651 | while (escape_char_run > 0) | |
1652 | { | |
1653 | *parg++ = escape_char; | |
1654 | escape_char_run--; | |
1655 | } | |
1656 | /* escape all quote chars, even at beginning or end */ | |
1657 | *parg++ = escape_char; | |
1658 | } | |
dbb70029 GM |
1659 | else if (escape_char == '"' && *p == '\\') |
1660 | *parg++ = '\\'; | |
b2fc9f3d GV |
1661 | *parg++ = *p; |
1662 | ||
1663 | if (*p == escape_char && escape_char != '"') | |
1664 | escape_char_run++; | |
1665 | else | |
1666 | escape_char_run = 0; | |
1667 | } | |
1668 | /* double escape chars before enclosing quote */ | |
1669 | while (escape_char_run > 0) | |
1670 | { | |
1671 | *parg++ = escape_char; | |
1672 | escape_char_run--; | |
1673 | } | |
1674 | #endif | |
c519b5e1 GV |
1675 | *parg++ = '"'; |
1676 | } | |
1677 | else | |
1678 | { | |
1679 | strcpy (parg, *targ); | |
1680 | parg += strlen (*targ); | |
1681 | } | |
6cdfb6e6 | 1682 | *parg++ = ' '; |
c519b5e1 | 1683 | targ++; |
6cdfb6e6 RS |
1684 | } |
1685 | *--parg = '\0'; | |
177c0ea7 | 1686 | |
6cdfb6e6 RS |
1687 | /* and envp... */ |
1688 | arglen = 1; | |
1689 | targ = envp; | |
d9709fde | 1690 | numenv = 1; /* for end null */ |
6cdfb6e6 RS |
1691 | while (*targ) |
1692 | { | |
1693 | arglen += strlen (*targ++) + 1; | |
d9709fde | 1694 | numenv++; |
6cdfb6e6 | 1695 | } |
d9709fde | 1696 | /* extra env vars... */ |
2f246cd3 | 1697 | sprintf (ppid_env_var_buffer, "EM_PARENT_PROCESS_ID=%lu", |
6cdfb6e6 RS |
1698 | GetCurrentProcessId ()); |
1699 | arglen += strlen (ppid_env_var_buffer) + 1; | |
d9709fde | 1700 | numenv++; |
6cdfb6e6 | 1701 | |
d9709fde GV |
1702 | /* merge env passed in and extra env into one, and sort it. */ |
1703 | targ = (char **) alloca (numenv * sizeof (char *)); | |
1704 | merge_and_sort_env (envp, extra_env, targ); | |
1705 | ||
1706 | /* concatenate env entries. */ | |
c519b5e1 | 1707 | env = alloca (arglen); |
6cdfb6e6 RS |
1708 | parg = env; |
1709 | while (*targ) | |
1710 | { | |
1711 | strcpy (parg, *targ); | |
1712 | parg += strlen (*targ++); | |
1713 | *parg++ = '\0'; | |
1714 | } | |
6cdfb6e6 RS |
1715 | *parg++ = '\0'; |
1716 | *parg = '\0'; | |
c519b5e1 GV |
1717 | |
1718 | cp = new_child (); | |
1719 | if (cp == NULL) | |
1720 | { | |
1721 | errno = EAGAIN; | |
1722 | return -1; | |
1723 | } | |
177c0ea7 | 1724 | |
6cdfb6e6 | 1725 | /* Now create the process. */ |
a55a5f3c | 1726 | if (!create_child (cmdname, cmdline, env, is_gui_app, &pid, cp)) |
6cdfb6e6 | 1727 | { |
c519b5e1 | 1728 | delete_child (cp); |
6cdfb6e6 | 1729 | errno = ENOEXEC; |
c519b5e1 | 1730 | return -1; |
6cdfb6e6 | 1731 | } |
177c0ea7 | 1732 | |
c519b5e1 | 1733 | return pid; |
6cdfb6e6 RS |
1734 | } |
1735 | ||
1736 | /* Emulate the select call | |
1737 | Wait for available input on any of the given rfds, or timeout if | |
1738 | a timeout is given and no input is detected | |
b2fc9f3d GV |
1739 | wfds and efds are not supported and must be NULL. |
1740 | ||
1741 | For simplicity, we detect the death of child processes here and | |
1742 | synchronously call the SIGCHLD handler. Since it is possible for | |
1743 | children to be created without a corresponding pipe handle from which | |
1744 | to read output, we wait separately on the process handles as well as | |
1745 | the char_avail events for each process pipe. We only call | |
86143765 RS |
1746 | wait/reap_process when the process actually terminates. |
1747 | ||
1748 | To reduce the number of places in which Emacs can be hung such that | |
1749 | C-g is not able to interrupt it, we always wait on interrupt_handle | |
04bf5b65 | 1750 | (which is signaled by the input thread when C-g is detected). If we |
86143765 RS |
1751 | detect that we were woken up by C-g, we return -1 with errno set to |
1752 | EINTR as on Unix. */ | |
6cdfb6e6 | 1753 | |
7684e57b | 1754 | /* From w32console.c */ |
6cdfb6e6 | 1755 | extern HANDLE keyboard_handle; |
86143765 RS |
1756 | |
1757 | /* From w32xfns.c */ | |
1758 | extern HANDLE interrupt_handle; | |
1759 | ||
6cdfb6e6 RS |
1760 | /* From process.c */ |
1761 | extern int proc_buffered_char[]; | |
1762 | ||
177c0ea7 | 1763 | int |
22759c72 | 1764 | sys_select (int nfds, SELECT_TYPE *rfds, SELECT_TYPE *wfds, SELECT_TYPE *efds, |
c9240d7a | 1765 | EMACS_TIME *timeout, void *ignored) |
6cdfb6e6 RS |
1766 | { |
1767 | SELECT_TYPE orfds; | |
b2fc9f3d GV |
1768 | DWORD timeout_ms, start_time; |
1769 | int i, nh, nc, nr; | |
6cdfb6e6 | 1770 | DWORD active; |
b2fc9f3d GV |
1771 | child_process *cp, *cps[MAX_CHILDREN]; |
1772 | HANDLE wait_hnd[MAXDESC + MAX_CHILDREN]; | |
c519b5e1 | 1773 | int fdindex[MAXDESC]; /* mapping from wait handles back to descriptors */ |
177c0ea7 | 1774 | |
388cdec0 EZ |
1775 | timeout_ms = |
1776 | timeout ? (timeout->tv_sec * 1000 + timeout->tv_nsec / 1000000) : INFINITE; | |
b2fc9f3d | 1777 | |
6cdfb6e6 | 1778 | /* If the descriptor sets are NULL but timeout isn't, then just Sleep. */ |
177c0ea7 | 1779 | if (rfds == NULL && wfds == NULL && efds == NULL && timeout != NULL) |
6cdfb6e6 | 1780 | { |
b2fc9f3d | 1781 | Sleep (timeout_ms); |
6cdfb6e6 RS |
1782 | return 0; |
1783 | } | |
1784 | ||
1785 | /* Otherwise, we only handle rfds, so fail otherwise. */ | |
1786 | if (rfds == NULL || wfds != NULL || efds != NULL) | |
1787 | { | |
1788 | errno = EINVAL; | |
1789 | return -1; | |
1790 | } | |
177c0ea7 | 1791 | |
6cdfb6e6 RS |
1792 | orfds = *rfds; |
1793 | FD_ZERO (rfds); | |
1794 | nr = 0; | |
86143765 RS |
1795 | |
1796 | /* Always wait on interrupt_handle, to detect C-g (quit). */ | |
1797 | wait_hnd[0] = interrupt_handle; | |
1798 | fdindex[0] = -1; | |
177c0ea7 | 1799 | |
b2fc9f3d | 1800 | /* Build a list of pipe handles to wait on. */ |
86143765 | 1801 | nh = 1; |
6cdfb6e6 RS |
1802 | for (i = 0; i < nfds; i++) |
1803 | if (FD_ISSET (i, &orfds)) | |
1804 | { | |
1805 | if (i == 0) | |
1806 | { | |
c519b5e1 GV |
1807 | if (keyboard_handle) |
1808 | { | |
1809 | /* Handle stdin specially */ | |
1810 | wait_hnd[nh] = keyboard_handle; | |
1811 | fdindex[nh] = i; | |
1812 | nh++; | |
1813 | } | |
6cdfb6e6 RS |
1814 | |
1815 | /* Check for any emacs-generated input in the queue since | |
1816 | it won't be detected in the wait */ | |
1817 | if (detect_input_pending ()) | |
1818 | { | |
1819 | FD_SET (i, rfds); | |
c519b5e1 | 1820 | return 1; |
6cdfb6e6 RS |
1821 | } |
1822 | } | |
1823 | else | |
1824 | { | |
c519b5e1 GV |
1825 | /* Child process and socket input */ |
1826 | cp = fd_info[i].cp; | |
6cdfb6e6 RS |
1827 | if (cp) |
1828 | { | |
c519b5e1 GV |
1829 | int current_status = cp->status; |
1830 | ||
1831 | if (current_status == STATUS_READ_ACKNOWLEDGED) | |
1832 | { | |
1833 | /* Tell reader thread which file handle to use. */ | |
1834 | cp->fd = i; | |
1835 | /* Wake up the reader thread for this process */ | |
1836 | cp->status = STATUS_READ_READY; | |
1837 | if (!SetEvent (cp->char_consumed)) | |
1838 | DebPrint (("nt_select.SetEvent failed with " | |
1839 | "%lu for fd %ld\n", GetLastError (), i)); | |
1840 | } | |
1841 | ||
1842 | #ifdef CHECK_INTERLOCK | |
1843 | /* slightly crude cross-checking of interlock between threads */ | |
1844 | ||
1845 | current_status = cp->status; | |
1846 | if (WaitForSingleObject (cp->char_avail, 0) == WAIT_OBJECT_0) | |
1847 | { | |
04bf5b65 | 1848 | /* char_avail has been signaled, so status (which may |
c519b5e1 GV |
1849 | have changed) should indicate read has completed |
1850 | but has not been acknowledged. */ | |
1851 | current_status = cp->status; | |
b2fc9f3d GV |
1852 | if (current_status != STATUS_READ_SUCCEEDED |
1853 | && current_status != STATUS_READ_FAILED) | |
c519b5e1 GV |
1854 | DebPrint (("char_avail set, but read not completed: status %d\n", |
1855 | current_status)); | |
1856 | } | |
1857 | else | |
1858 | { | |
04bf5b65 | 1859 | /* char_avail has not been signaled, so status should |
c519b5e1 | 1860 | indicate that read is in progress; small possibility |
04bf5b65 | 1861 | that read has completed but event wasn't yet signaled |
c519b5e1 GV |
1862 | when we tested it (because a context switch occurred |
1863 | or if running on separate CPUs). */ | |
b2fc9f3d GV |
1864 | if (current_status != STATUS_READ_READY |
1865 | && current_status != STATUS_READ_IN_PROGRESS | |
1866 | && current_status != STATUS_READ_SUCCEEDED | |
1867 | && current_status != STATUS_READ_FAILED) | |
c519b5e1 GV |
1868 | DebPrint (("char_avail reset, but read status is bad: %d\n", |
1869 | current_status)); | |
1870 | } | |
1871 | #endif | |
1872 | wait_hnd[nh] = cp->char_avail; | |
1873 | fdindex[nh] = i; | |
1088b922 | 1874 | if (!wait_hnd[nh]) emacs_abort (); |
c519b5e1 | 1875 | nh++; |
6cdfb6e6 RS |
1876 | #ifdef FULL_DEBUG |
1877 | DebPrint (("select waiting on child %d fd %d\n", | |
1878 | cp-child_procs, i)); | |
1879 | #endif | |
6cdfb6e6 RS |
1880 | } |
1881 | else | |
1882 | { | |
c519b5e1 | 1883 | /* Unable to find something to wait on for this fd, skip */ |
ef79fbba GV |
1884 | |
1885 | /* Note that this is not a fatal error, and can in fact | |
1886 | happen in unusual circumstances. Specifically, if | |
1887 | sys_spawnve fails, eg. because the program doesn't | |
1888 | exist, and debug-on-error is t so Fsignal invokes a | |
1889 | nested input loop, then the process output pipe is | |
1890 | still included in input_wait_mask with no child_proc | |
1891 | associated with it. (It is removed when the debugger | |
1892 | exits the nested input loop and the error is thrown.) */ | |
1893 | ||
c519b5e1 | 1894 | DebPrint (("sys_select: fd %ld is invalid! ignoring\n", i)); |
6cdfb6e6 RS |
1895 | } |
1896 | } | |
1897 | } | |
b2fc9f3d GV |
1898 | |
1899 | count_children: | |
1900 | /* Add handles of child processes. */ | |
1901 | nc = 0; | |
9d4f32e8 | 1902 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
ef79fbba GV |
1903 | /* Some child_procs might be sockets; ignore them. Also some |
1904 | children may have died already, but we haven't finished reading | |
1905 | the process output; ignore them too. */ | |
ae11bda5 | 1906 | if (CHILD_ACTIVE (cp) && cp->procinfo.hProcess |
ef79fbba GV |
1907 | && (cp->fd < 0 |
1908 | || (fd_info[cp->fd].flags & FILE_SEND_SIGCHLD) == 0 | |
1909 | || (fd_info[cp->fd].flags & FILE_AT_EOF) != 0) | |
1910 | ) | |
b2fc9f3d GV |
1911 | { |
1912 | wait_hnd[nh + nc] = cp->procinfo.hProcess; | |
1913 | cps[nc] = cp; | |
1914 | nc++; | |
1915 | } | |
177c0ea7 | 1916 | |
6cdfb6e6 | 1917 | /* Nothing to look for, so we didn't find anything */ |
177c0ea7 | 1918 | if (nh + nc == 0) |
6cdfb6e6 | 1919 | { |
22759c72 | 1920 | if (timeout) |
b2fc9f3d | 1921 | Sleep (timeout_ms); |
6cdfb6e6 RS |
1922 | return 0; |
1923 | } | |
177c0ea7 | 1924 | |
b2fc9f3d | 1925 | start_time = GetTickCount (); |
8b031dcc | 1926 | |
04bf5b65 | 1927 | /* Wait for input or child death to be signaled. If user input is |
8b031dcc AI |
1928 | allowed, then also accept window messages. */ |
1929 | if (FD_ISSET (0, &orfds)) | |
1930 | active = MsgWaitForMultipleObjects (nh + nc, wait_hnd, FALSE, timeout_ms, | |
1931 | QS_ALLINPUT); | |
1932 | else | |
1933 | active = WaitForMultipleObjects (nh + nc, wait_hnd, FALSE, timeout_ms); | |
c519b5e1 | 1934 | |
6cdfb6e6 RS |
1935 | if (active == WAIT_FAILED) |
1936 | { | |
1937 | DebPrint (("select.WaitForMultipleObjects (%d, %lu) failed with %lu\n", | |
b2fc9f3d | 1938 | nh + nc, timeout_ms, GetLastError ())); |
d64b707c | 1939 | /* don't return EBADF - this causes wait_reading_process_output to |
c519b5e1 GV |
1940 | abort; WAIT_FAILED is returned when single-stepping under |
1941 | Windows 95 after switching thread focus in debugger, and | |
1942 | possibly at other times. */ | |
1943 | errno = EINTR; | |
6cdfb6e6 RS |
1944 | return -1; |
1945 | } | |
1946 | else if (active == WAIT_TIMEOUT) | |
1947 | { | |
1948 | return 0; | |
1949 | } | |
b2fc9f3d GV |
1950 | else if (active >= WAIT_OBJECT_0 |
1951 | && active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS) | |
6cdfb6e6 RS |
1952 | { |
1953 | active -= WAIT_OBJECT_0; | |
1954 | } | |
b2fc9f3d GV |
1955 | else if (active >= WAIT_ABANDONED_0 |
1956 | && active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS) | |
6cdfb6e6 RS |
1957 | { |
1958 | active -= WAIT_ABANDONED_0; | |
1959 | } | |
b2fc9f3d | 1960 | else |
1088b922 | 1961 | emacs_abort (); |
6cdfb6e6 | 1962 | |
c519b5e1 | 1963 | /* Loop over all handles after active (now officially documented as |
04bf5b65 | 1964 | being the first signaled handle in the array). We do this to |
c519b5e1 GV |
1965 | ensure fairness, so that all channels with data available will be |
1966 | processed - otherwise higher numbered channels could be starved. */ | |
1967 | do | |
6cdfb6e6 | 1968 | { |
8b031dcc AI |
1969 | if (active == nh + nc) |
1970 | { | |
1971 | /* There are messages in the lisp thread's queue; we must | |
1972 | drain the queue now to ensure they are processed promptly, | |
1973 | because if we don't do so, we will not be woken again until | |
1974 | further messages arrive. | |
1975 | ||
1976 | NB. If ever we allow window message procedures to callback | |
1977 | into lisp, we will need to ensure messages are dispatched | |
1978 | at a safe time for lisp code to be run (*), and we may also | |
1979 | want to provide some hooks in the dispatch loop to cater | |
1980 | for modeless dialogs created by lisp (ie. to register | |
1981 | window handles to pass to IsDialogMessage). | |
1982 | ||
1983 | (*) Note that MsgWaitForMultipleObjects above is an | |
1984 | internal dispatch point for messages that are sent to | |
1985 | windows created by this thread. */ | |
1986 | drain_message_queue (); | |
1987 | } | |
1988 | else if (active >= nh) | |
b2fc9f3d GV |
1989 | { |
1990 | cp = cps[active - nh]; | |
ef79fbba GV |
1991 | |
1992 | /* We cannot always signal SIGCHLD immediately; if we have not | |
1993 | finished reading the process output, we must delay sending | |
1994 | SIGCHLD until we do. */ | |
1995 | ||
1996 | if (cp->fd >= 0 && (fd_info[cp->fd].flags & FILE_AT_EOF) == 0) | |
1997 | fd_info[cp->fd].flags |= FILE_SEND_SIGCHLD; | |
b2fc9f3d | 1998 | /* SIG_DFL for SIGCHLD is ignore */ |
ef79fbba GV |
1999 | else if (sig_handlers[SIGCHLD] != SIG_DFL && |
2000 | sig_handlers[SIGCHLD] != SIG_IGN) | |
b2fc9f3d GV |
2001 | { |
2002 | #ifdef FULL_DEBUG | |
2003 | DebPrint (("select calling SIGCHLD handler for pid %d\n", | |
2004 | cp->pid)); | |
2005 | #endif | |
d4547511 | 2006 | dead_child = cp; |
b2fc9f3d | 2007 | sig_handlers[SIGCHLD] (SIGCHLD); |
d4547511 | 2008 | dead_child = NULL; |
b2fc9f3d GV |
2009 | } |
2010 | } | |
86143765 RS |
2011 | else if (fdindex[active] == -1) |
2012 | { | |
2013 | /* Quit (C-g) was detected. */ | |
2014 | errno = EINTR; | |
2015 | return -1; | |
2016 | } | |
b2fc9f3d | 2017 | else if (fdindex[active] == 0) |
c519b5e1 GV |
2018 | { |
2019 | /* Keyboard input available */ | |
2020 | FD_SET (0, rfds); | |
6cdfb6e6 | 2021 | nr++; |
c519b5e1 | 2022 | } |
6cdfb6e6 | 2023 | else |
c519b5e1 | 2024 | { |
b2fc9f3d GV |
2025 | /* must be a socket or pipe - read ahead should have |
2026 | completed, either succeeding or failing. */ | |
c519b5e1 GV |
2027 | FD_SET (fdindex[active], rfds); |
2028 | nr++; | |
c519b5e1 GV |
2029 | } |
2030 | ||
b2fc9f3d GV |
2031 | /* Even though wait_reading_process_output only reads from at most |
2032 | one channel, we must process all channels here so that we reap | |
2033 | all children that have died. */ | |
2034 | while (++active < nh + nc) | |
c519b5e1 GV |
2035 | if (WaitForSingleObject (wait_hnd[active], 0) == WAIT_OBJECT_0) |
2036 | break; | |
b2fc9f3d GV |
2037 | } while (active < nh + nc); |
2038 | ||
2039 | /* If no input has arrived and timeout hasn't expired, wait again. */ | |
2040 | if (nr == 0) | |
2041 | { | |
2042 | DWORD elapsed = GetTickCount () - start_time; | |
2043 | ||
2044 | if (timeout_ms > elapsed) /* INFINITE is MAX_UINT */ | |
2045 | { | |
2046 | if (timeout_ms != INFINITE) | |
2047 | timeout_ms -= elapsed; | |
2048 | goto count_children; | |
2049 | } | |
2050 | } | |
c519b5e1 | 2051 | |
6cdfb6e6 RS |
2052 | return nr; |
2053 | } | |
2054 | ||
c519b5e1 | 2055 | /* Substitute for certain kill () operations */ |
b2fc9f3d GV |
2056 | |
2057 | static BOOL CALLBACK | |
42c95ffb | 2058 | find_child_console (HWND hwnd, LPARAM arg) |
b2fc9f3d | 2059 | { |
42c95ffb | 2060 | child_process * cp = (child_process *) arg; |
b2fc9f3d GV |
2061 | DWORD thread_id; |
2062 | DWORD process_id; | |
2063 | ||
2064 | thread_id = GetWindowThreadProcessId (hwnd, &process_id); | |
2065 | if (process_id == cp->procinfo.dwProcessId) | |
2066 | { | |
2067 | char window_class[32]; | |
2068 | ||
2069 | GetClassName (hwnd, window_class, sizeof (window_class)); | |
2070 | if (strcmp (window_class, | |
417a7a0e | 2071 | (os_subtype == OS_9X) |
b2fc9f3d GV |
2072 | ? "tty" |
2073 | : "ConsoleWindowClass") == 0) | |
2074 | { | |
2075 | cp->hwnd = hwnd; | |
2076 | return FALSE; | |
2077 | } | |
2078 | } | |
2079 | /* keep looking */ | |
2080 | return TRUE; | |
2081 | } | |
2082 | ||
16b22fef | 2083 | /* Emulate 'kill', but only for other processes. */ |
177c0ea7 | 2084 | int |
c519b5e1 | 2085 | sys_kill (int pid, int sig) |
6cdfb6e6 RS |
2086 | { |
2087 | child_process *cp; | |
c519b5e1 GV |
2088 | HANDLE proc_hand; |
2089 | int need_to_free = 0; | |
2090 | int rc = 0; | |
177c0ea7 | 2091 | |
6cdfb6e6 RS |
2092 | /* Only handle signals that will result in the process dying */ |
2093 | if (sig != SIGINT && sig != SIGKILL && sig != SIGQUIT && sig != SIGHUP) | |
2094 | { | |
2095 | errno = EINVAL; | |
2096 | return -1; | |
2097 | } | |
c519b5e1 | 2098 | |
6cdfb6e6 RS |
2099 | cp = find_child_pid (pid); |
2100 | if (cp == NULL) | |
2101 | { | |
16b22fef EZ |
2102 | /* We were passed a PID of something other than our subprocess. |
2103 | If that is our own PID, we will send to ourself a message to | |
2104 | close the selected frame, which does not necessarily | |
2105 | terminates Emacs. But then we are not supposed to call | |
2106 | sys_kill with our own PID. */ | |
c519b5e1 GV |
2107 | proc_hand = OpenProcess (PROCESS_TERMINATE, 0, pid); |
2108 | if (proc_hand == NULL) | |
2109 | { | |
2110 | errno = EPERM; | |
2111 | return -1; | |
2112 | } | |
2113 | need_to_free = 1; | |
2114 | } | |
2115 | else | |
2116 | { | |
2117 | proc_hand = cp->procinfo.hProcess; | |
2118 | pid = cp->procinfo.dwProcessId; | |
b2fc9f3d GV |
2119 | |
2120 | /* Try to locate console window for process. */ | |
2121 | EnumWindows (find_child_console, (LPARAM) cp); | |
6cdfb6e6 | 2122 | } |
177c0ea7 | 2123 | |
a55a5f3c | 2124 | if (sig == SIGINT || sig == SIGQUIT) |
6cdfb6e6 | 2125 | { |
b2fc9f3d GV |
2126 | if (NILP (Vw32_start_process_share_console) && cp && cp->hwnd) |
2127 | { | |
2128 | BYTE control_scan_code = (BYTE) MapVirtualKey (VK_CONTROL, 0); | |
a55a5f3c AI |
2129 | /* Fake Ctrl-C for SIGINT, and Ctrl-Break for SIGQUIT. */ |
2130 | BYTE vk_break_code = (sig == SIGINT) ? 'C' : VK_CANCEL; | |
b2fc9f3d GV |
2131 | BYTE break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0); |
2132 | HWND foreground_window; | |
2133 | ||
2134 | if (break_scan_code == 0) | |
2135 | { | |
a55a5f3c | 2136 | /* Fake Ctrl-C for SIGQUIT if we can't manage Ctrl-Break. */ |
b2fc9f3d GV |
2137 | vk_break_code = 'C'; |
2138 | break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0); | |
2139 | } | |
2140 | ||
2141 | foreground_window = GetForegroundWindow (); | |
f446016f | 2142 | if (foreground_window) |
b2fc9f3d | 2143 | { |
f446016f AI |
2144 | /* NT 5.0, and apparently also Windows 98, will not allow |
2145 | a Window to be set to foreground directly without the | |
2146 | user's involvement. The workaround is to attach | |
2147 | ourselves to the thread that owns the foreground | |
2148 | window, since that is the only thread that can set the | |
2149 | foreground window. */ | |
2150 | DWORD foreground_thread, child_thread; | |
2151 | foreground_thread = | |
2152 | GetWindowThreadProcessId (foreground_window, NULL); | |
2153 | if (foreground_thread == GetCurrentThreadId () | |
2154 | || !AttachThreadInput (GetCurrentThreadId (), | |
2155 | foreground_thread, TRUE)) | |
2156 | foreground_thread = 0; | |
2157 | ||
2158 | child_thread = GetWindowThreadProcessId (cp->hwnd, NULL); | |
2159 | if (child_thread == GetCurrentThreadId () | |
2160 | || !AttachThreadInput (GetCurrentThreadId (), | |
2161 | child_thread, TRUE)) | |
2162 | child_thread = 0; | |
2163 | ||
2164 | /* Set the foreground window to the child. */ | |
2165 | if (SetForegroundWindow (cp->hwnd)) | |
2166 | { | |
2167 | /* Generate keystrokes as if user had typed Ctrl-Break or | |
2168 | Ctrl-C. */ | |
2169 | keybd_event (VK_CONTROL, control_scan_code, 0, 0); | |
2170 | keybd_event (vk_break_code, break_scan_code, | |
2171 | (vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY), 0); | |
2172 | keybd_event (vk_break_code, break_scan_code, | |
2173 | (vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY) | |
2174 | | KEYEVENTF_KEYUP, 0); | |
2175 | keybd_event (VK_CONTROL, control_scan_code, | |
2176 | KEYEVENTF_KEYUP, 0); | |
2177 | ||
2178 | /* Sleep for a bit to give time for Emacs frame to respond | |
2179 | to focus change events (if Emacs was active app). */ | |
2180 | Sleep (100); | |
2181 | ||
2182 | SetForegroundWindow (foreground_window); | |
2183 | } | |
2184 | /* Detach from the foreground and child threads now that | |
2185 | the foreground switching is over. */ | |
2186 | if (foreground_thread) | |
2187 | AttachThreadInput (GetCurrentThreadId (), | |
2188 | foreground_thread, FALSE); | |
2189 | if (child_thread) | |
2190 | AttachThreadInput (GetCurrentThreadId (), | |
2191 | child_thread, FALSE); | |
2192 | } | |
2193 | } | |
c519b5e1 | 2194 | /* Ctrl-Break is NT equivalent of SIGINT. */ |
b2fc9f3d | 2195 | else if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid)) |
6cdfb6e6 | 2196 | { |
c519b5e1 | 2197 | DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d " |
6cdfb6e6 RS |
2198 | "for pid %lu\n", GetLastError (), pid)); |
2199 | errno = EINVAL; | |
c519b5e1 | 2200 | rc = -1; |
80874ef7 | 2201 | } |
6cdfb6e6 RS |
2202 | } |
2203 | else | |
2204 | { | |
b2fc9f3d GV |
2205 | if (NILP (Vw32_start_process_share_console) && cp && cp->hwnd) |
2206 | { | |
2207 | #if 1 | |
417a7a0e | 2208 | if (os_subtype == OS_9X) |
b2fc9f3d GV |
2209 | { |
2210 | /* | |
2211 | Another possibility is to try terminating the VDM out-right by | |
2212 | calling the Shell VxD (id 0x17) V86 interface, function #4 | |
2213 | "SHELL_Destroy_VM", ie. | |
2214 | ||
2215 | mov edx,4 | |
2216 | mov ebx,vm_handle | |
2217 | call shellapi | |
2218 | ||
2219 | First need to determine the current VM handle, and then arrange for | |
2220 | the shellapi call to be made from the system vm (by using | |
2221 | Switch_VM_and_callback). | |
2222 | ||
2223 | Could try to invoke DestroyVM through CallVxD. | |
2224 | ||
2225 | */ | |
ef79fbba | 2226 | #if 0 |
b46a6a83 | 2227 | /* On Windows 95, posting WM_QUIT causes the 16-bit subsystem |
ef79fbba GV |
2228 | to hang when cmdproxy is used in conjunction with |
2229 | command.com for an interactive shell. Posting | |
2230 | WM_CLOSE pops up a dialog that, when Yes is selected, | |
2231 | does the same thing. TerminateProcess is also less | |
2232 | than ideal in that subprocesses tend to stick around | |
2233 | until the machine is shutdown, but at least it | |
2234 | doesn't freeze the 16-bit subsystem. */ | |
b2fc9f3d | 2235 | PostMessage (cp->hwnd, WM_QUIT, 0xff, 0); |
ef79fbba GV |
2236 | #endif |
2237 | if (!TerminateProcess (proc_hand, 0xff)) | |
2238 | { | |
2239 | DebPrint (("sys_kill.TerminateProcess returned %d " | |
2240 | "for pid %lu\n", GetLastError (), pid)); | |
2241 | errno = EINVAL; | |
2242 | rc = -1; | |
2243 | } | |
b2fc9f3d GV |
2244 | } |
2245 | else | |
2246 | #endif | |
2247 | PostMessage (cp->hwnd, WM_CLOSE, 0, 0); | |
2248 | } | |
fbd6baed | 2249 | /* Kill the process. On W32 this doesn't kill child processes |
8eae7766 | 2250 | so it doesn't work very well for shells which is why it's not |
b2fc9f3d GV |
2251 | used in every case. */ |
2252 | else if (!TerminateProcess (proc_hand, 0xff)) | |
6cdfb6e6 | 2253 | { |
c519b5e1 | 2254 | DebPrint (("sys_kill.TerminateProcess returned %d " |
6cdfb6e6 RS |
2255 | "for pid %lu\n", GetLastError (), pid)); |
2256 | errno = EINVAL; | |
c519b5e1 | 2257 | rc = -1; |
6cdfb6e6 RS |
2258 | } |
2259 | } | |
c519b5e1 GV |
2260 | |
2261 | if (need_to_free) | |
2262 | CloseHandle (proc_hand); | |
2263 | ||
2264 | return rc; | |
6cdfb6e6 RS |
2265 | } |
2266 | ||
c519b5e1 GV |
2267 | /* The following two routines are used to manipulate stdin, stdout, and |
2268 | stderr of our child processes. | |
2269 | ||
2270 | Assuming that in, out, and err are *not* inheritable, we make them | |
2271 | stdin, stdout, and stderr of the child as follows: | |
2272 | ||
2273 | - Save the parent's current standard handles. | |
2274 | - Set the std handles to inheritable duplicates of the ones being passed in. | |
2275 | (Note that _get_osfhandle() is an io.h procedure that retrieves the | |
2276 | NT file handle for a crt file descriptor.) | |
2277 | - Spawn the child, which inherits in, out, and err as stdin, | |
2278 | stdout, and stderr. (see Spawnve) | |
2279 | - Close the std handles passed to the child. | |
2280 | - Reset the parent's standard handles to the saved handles. | |
2281 | (see reset_standard_handles) | |
2282 | We assume that the caller closes in, out, and err after calling us. */ | |
2283 | ||
2284 | void | |
2285 | prepare_standard_handles (int in, int out, int err, HANDLE handles[3]) | |
6cdfb6e6 | 2286 | { |
c519b5e1 GV |
2287 | HANDLE parent; |
2288 | HANDLE newstdin, newstdout, newstderr; | |
2289 | ||
2290 | parent = GetCurrentProcess (); | |
2291 | ||
2292 | handles[0] = GetStdHandle (STD_INPUT_HANDLE); | |
2293 | handles[1] = GetStdHandle (STD_OUTPUT_HANDLE); | |
2294 | handles[2] = GetStdHandle (STD_ERROR_HANDLE); | |
2295 | ||
2296 | /* make inheritable copies of the new handles */ | |
177c0ea7 | 2297 | if (!DuplicateHandle (parent, |
c519b5e1 GV |
2298 | (HANDLE) _get_osfhandle (in), |
2299 | parent, | |
177c0ea7 JB |
2300 | &newstdin, |
2301 | 0, | |
2302 | TRUE, | |
c519b5e1 GV |
2303 | DUPLICATE_SAME_ACCESS)) |
2304 | report_file_error ("Duplicating input handle for child", Qnil); | |
177c0ea7 | 2305 | |
c519b5e1 GV |
2306 | if (!DuplicateHandle (parent, |
2307 | (HANDLE) _get_osfhandle (out), | |
2308 | parent, | |
2309 | &newstdout, | |
2310 | 0, | |
2311 | TRUE, | |
2312 | DUPLICATE_SAME_ACCESS)) | |
2313 | report_file_error ("Duplicating output handle for child", Qnil); | |
177c0ea7 | 2314 | |
c519b5e1 GV |
2315 | if (!DuplicateHandle (parent, |
2316 | (HANDLE) _get_osfhandle (err), | |
2317 | parent, | |
2318 | &newstderr, | |
2319 | 0, | |
2320 | TRUE, | |
2321 | DUPLICATE_SAME_ACCESS)) | |
2322 | report_file_error ("Duplicating error handle for child", Qnil); | |
2323 | ||
2324 | /* and store them as our std handles */ | |
2325 | if (!SetStdHandle (STD_INPUT_HANDLE, newstdin)) | |
2326 | report_file_error ("Changing stdin handle", Qnil); | |
177c0ea7 | 2327 | |
c519b5e1 GV |
2328 | if (!SetStdHandle (STD_OUTPUT_HANDLE, newstdout)) |
2329 | report_file_error ("Changing stdout handle", Qnil); | |
2330 | ||
2331 | if (!SetStdHandle (STD_ERROR_HANDLE, newstderr)) | |
2332 | report_file_error ("Changing stderr handle", Qnil); | |
2333 | } | |
2334 | ||
2335 | void | |
2336 | reset_standard_handles (int in, int out, int err, HANDLE handles[3]) | |
2337 | { | |
2338 | /* close the duplicated handles passed to the child */ | |
2339 | CloseHandle (GetStdHandle (STD_INPUT_HANDLE)); | |
2340 | CloseHandle (GetStdHandle (STD_OUTPUT_HANDLE)); | |
2341 | CloseHandle (GetStdHandle (STD_ERROR_HANDLE)); | |
2342 | ||
2343 | /* now restore parent's saved std handles */ | |
2344 | SetStdHandle (STD_INPUT_HANDLE, handles[0]); | |
2345 | SetStdHandle (STD_OUTPUT_HANDLE, handles[1]); | |
2346 | SetStdHandle (STD_ERROR_HANDLE, handles[2]); | |
6cdfb6e6 | 2347 | } |
c519b5e1 | 2348 | |
b2fc9f3d GV |
2349 | void |
2350 | set_process_dir (char * dir) | |
2351 | { | |
2352 | process_dir = dir; | |
2353 | } | |
2354 | ||
a11e68d0 RS |
2355 | /* To avoid problems with winsock implementations that work over dial-up |
2356 | connections causing or requiring a connection to exist while Emacs is | |
2357 | running, Emacs no longer automatically loads winsock on startup if it | |
2358 | is present. Instead, it will be loaded when open-network-stream is | |
2359 | first called. | |
2360 | ||
2361 | To allow full control over when winsock is loaded, we provide these | |
2362 | two functions to dynamically load and unload winsock. This allows | |
2363 | dial-up users to only be connected when they actually need to use | |
2364 | socket services. */ | |
2365 | ||
7684e57b | 2366 | /* From w32.c */ |
a11e68d0 RS |
2367 | extern HANDLE winsock_lib; |
2368 | extern BOOL term_winsock (void); | |
2369 | extern BOOL init_winsock (int load_now); | |
2370 | ||
fbd6baed | 2371 | DEFUN ("w32-has-winsock", Fw32_has_winsock, Sw32_has_winsock, 0, 1, 0, |
33f09670 JR |
2372 | doc: /* Test for presence of the Windows socket library `winsock'. |
2373 | Returns non-nil if winsock support is present, nil otherwise. | |
2374 | ||
2375 | If the optional argument LOAD-NOW is non-nil, the winsock library is | |
2376 | also loaded immediately if not already loaded. If winsock is loaded, | |
2377 | the winsock local hostname is returned (since this may be different from | |
2378 | the value of `system-name' and should supplant it), otherwise t is | |
2379 | returned to indicate winsock support is present. */) | |
5842a27b | 2380 | (Lisp_Object load_now) |
a11e68d0 RS |
2381 | { |
2382 | int have_winsock; | |
2383 | ||
2384 | have_winsock = init_winsock (!NILP (load_now)); | |
2385 | if (have_winsock) | |
2386 | { | |
2387 | if (winsock_lib != NULL) | |
2388 | { | |
2389 | /* Return new value for system-name. The best way to do this | |
2390 | is to call init_system_name, saving and restoring the | |
2391 | original value to avoid side-effects. */ | |
2392 | Lisp_Object orig_hostname = Vsystem_name; | |
2393 | Lisp_Object hostname; | |
2394 | ||
2395 | init_system_name (); | |
2396 | hostname = Vsystem_name; | |
2397 | Vsystem_name = orig_hostname; | |
2398 | return hostname; | |
2399 | } | |
2400 | return Qt; | |
2401 | } | |
2402 | return Qnil; | |
2403 | } | |
2404 | ||
fbd6baed | 2405 | DEFUN ("w32-unload-winsock", Fw32_unload_winsock, Sw32_unload_winsock, |
a11e68d0 | 2406 | 0, 0, 0, |
33f09670 JR |
2407 | doc: /* Unload the Windows socket library `winsock' if loaded. |
2408 | This is provided to allow dial-up socket connections to be disconnected | |
2409 | when no longer needed. Returns nil without unloading winsock if any | |
2410 | socket connections still exist. */) | |
5842a27b | 2411 | (void) |
a11e68d0 RS |
2412 | { |
2413 | return term_winsock () ? Qt : Qnil; | |
2414 | } | |
2415 | ||
93fdf2f8 | 2416 | \f |
b2fc9f3d GV |
2417 | /* Some miscellaneous functions that are Windows specific, but not GUI |
2418 | specific (ie. are applicable in terminal or batch mode as well). */ | |
2419 | ||
b2fc9f3d | 2420 | DEFUN ("w32-short-file-name", Fw32_short_file_name, Sw32_short_file_name, 1, 1, 0, |
33f09670 JR |
2421 | doc: /* Return the short file name version (8.3) of the full path of FILENAME. |
2422 | If FILENAME does not exist, return nil. | |
2423 | All path elements in FILENAME are converted to their short names. */) | |
5842a27b | 2424 | (Lisp_Object filename) |
b2fc9f3d GV |
2425 | { |
2426 | char shortname[MAX_PATH]; | |
2427 | ||
b7826503 | 2428 | CHECK_STRING (filename); |
b2fc9f3d GV |
2429 | |
2430 | /* first expand it. */ | |
2431 | filename = Fexpand_file_name (filename, Qnil); | |
2432 | ||
2433 | /* luckily, this returns the short version of each element in the path. */ | |
b23077df | 2434 | if (GetShortPathName (SDATA (ENCODE_FILE (filename)), shortname, MAX_PATH) == 0) |
b2fc9f3d GV |
2435 | return Qnil; |
2436 | ||
087fc47a | 2437 | dostounix_filename (shortname); |
b2fc9f3d GV |
2438 | |
2439 | return build_string (shortname); | |
2440 | } | |
2441 | ||
2442 | ||
2443 | DEFUN ("w32-long-file-name", Fw32_long_file_name, Sw32_long_file_name, | |
2444 | 1, 1, 0, | |
33f09670 JR |
2445 | doc: /* Return the long file name version of the full path of FILENAME. |
2446 | If FILENAME does not exist, return nil. | |
2447 | All path elements in FILENAME are converted to their long names. */) | |
5842a27b | 2448 | (Lisp_Object filename) |
b2fc9f3d GV |
2449 | { |
2450 | char longname[ MAX_PATH ]; | |
8dcaeba2 | 2451 | int drive_only = 0; |
b2fc9f3d | 2452 | |
b7826503 | 2453 | CHECK_STRING (filename); |
b2fc9f3d | 2454 | |
8dcaeba2 JR |
2455 | if (SBYTES (filename) == 2 |
2456 | && *(SDATA (filename) + 1) == ':') | |
2457 | drive_only = 1; | |
2458 | ||
b2fc9f3d GV |
2459 | /* first expand it. */ |
2460 | filename = Fexpand_file_name (filename, Qnil); | |
2461 | ||
b23077df | 2462 | if (!w32_get_long_filename (SDATA (ENCODE_FILE (filename)), longname, MAX_PATH)) |
b2fc9f3d GV |
2463 | return Qnil; |
2464 | ||
087fc47a | 2465 | dostounix_filename (longname); |
b2fc9f3d | 2466 | |
8dcaeba2 JR |
2467 | /* If we were passed only a drive, make sure that a slash is not appended |
2468 | for consistency with directories. Allow for drive mapping via SUBST | |
2469 | in case expand-file-name is ever changed to expand those. */ | |
2470 | if (drive_only && longname[1] == ':' && longname[2] == '/' && !longname[3]) | |
2471 | longname[2] = '\0'; | |
2472 | ||
b23077df | 2473 | return DECODE_FILE (build_string (longname)); |
b2fc9f3d GV |
2474 | } |
2475 | ||
33f09670 JR |
2476 | DEFUN ("w32-set-process-priority", Fw32_set_process_priority, |
2477 | Sw32_set_process_priority, 2, 2, 0, | |
2478 | doc: /* Set the priority of PROCESS to PRIORITY. | |
2479 | If PROCESS is nil, the priority of Emacs is changed, otherwise the | |
2480 | priority of the process whose pid is PROCESS is changed. | |
2481 | PRIORITY should be one of the symbols high, normal, or low; | |
2482 | any other symbol will be interpreted as normal. | |
2483 | ||
2484 | If successful, the return value is t, otherwise nil. */) | |
5842a27b | 2485 | (Lisp_Object process, Lisp_Object priority) |
b2fc9f3d GV |
2486 | { |
2487 | HANDLE proc_handle = GetCurrentProcess (); | |
2488 | DWORD priority_class = NORMAL_PRIORITY_CLASS; | |
2489 | Lisp_Object result = Qnil; | |
2490 | ||
b7826503 | 2491 | CHECK_SYMBOL (priority); |
b2fc9f3d GV |
2492 | |
2493 | if (!NILP (process)) | |
2494 | { | |
2495 | DWORD pid; | |
2496 | child_process *cp; | |
2497 | ||
b7826503 | 2498 | CHECK_NUMBER (process); |
b2fc9f3d GV |
2499 | |
2500 | /* Allow pid to be an internally generated one, or one obtained | |
b46a6a83 | 2501 | externally. This is necessary because real pids on Windows 95 are |
b2fc9f3d GV |
2502 | negative. */ |
2503 | ||
2504 | pid = XINT (process); | |
2505 | cp = find_child_pid (pid); | |
2506 | if (cp != NULL) | |
2507 | pid = cp->procinfo.dwProcessId; | |
2508 | ||
2509 | proc_handle = OpenProcess (PROCESS_SET_INFORMATION, FALSE, pid); | |
2510 | } | |
2511 | ||
2512 | if (EQ (priority, Qhigh)) | |
2513 | priority_class = HIGH_PRIORITY_CLASS; | |
2514 | else if (EQ (priority, Qlow)) | |
2515 | priority_class = IDLE_PRIORITY_CLASS; | |
2516 | ||
2517 | if (proc_handle != NULL) | |
2518 | { | |
2519 | if (SetPriorityClass (proc_handle, priority_class)) | |
2520 | result = Qt; | |
2521 | if (!NILP (process)) | |
2522 | CloseHandle (proc_handle); | |
2523 | } | |
2524 | ||
2525 | return result; | |
2526 | } | |
2527 | ||
d613418b EZ |
2528 | #ifdef HAVE_LANGINFO_CODESET |
2529 | /* Emulation of nl_langinfo. Used in fns.c:Flocale_info. */ | |
b56ceb92 JB |
2530 | char * |
2531 | nl_langinfo (nl_item item) | |
d613418b EZ |
2532 | { |
2533 | /* Conversion of Posix item numbers to their Windows equivalents. */ | |
2534 | static const LCTYPE w32item[] = { | |
2535 | LOCALE_IDEFAULTANSICODEPAGE, | |
2536 | LOCALE_SDAYNAME1, LOCALE_SDAYNAME2, LOCALE_SDAYNAME3, | |
2537 | LOCALE_SDAYNAME4, LOCALE_SDAYNAME5, LOCALE_SDAYNAME6, LOCALE_SDAYNAME7, | |
2538 | LOCALE_SMONTHNAME1, LOCALE_SMONTHNAME2, LOCALE_SMONTHNAME3, | |
2539 | LOCALE_SMONTHNAME4, LOCALE_SMONTHNAME5, LOCALE_SMONTHNAME6, | |
2540 | LOCALE_SMONTHNAME7, LOCALE_SMONTHNAME8, LOCALE_SMONTHNAME9, | |
2541 | LOCALE_SMONTHNAME10, LOCALE_SMONTHNAME11, LOCALE_SMONTHNAME12 | |
2542 | }; | |
2543 | ||
2544 | static char *nl_langinfo_buf = NULL; | |
2545 | static int nl_langinfo_len = 0; | |
2546 | ||
2547 | if (nl_langinfo_len <= 0) | |
2548 | nl_langinfo_buf = xmalloc (nl_langinfo_len = 1); | |
2549 | ||
2550 | if (item < 0 || item >= _NL_NUM) | |
2551 | nl_langinfo_buf[0] = 0; | |
2552 | else | |
2553 | { | |
2554 | LCID cloc = GetThreadLocale (); | |
2555 | int need_len = GetLocaleInfo (cloc, w32item[item] | LOCALE_USE_CP_ACP, | |
2556 | NULL, 0); | |
2557 | ||
2558 | if (need_len <= 0) | |
2559 | nl_langinfo_buf[0] = 0; | |
2560 | else | |
2561 | { | |
2562 | if (item == CODESET) | |
2563 | { | |
2564 | need_len += 2; /* for the "cp" prefix */ | |
2565 | if (need_len < 8) /* for the case we call GetACP */ | |
2566 | need_len = 8; | |
2567 | } | |
2568 | if (nl_langinfo_len <= need_len) | |
2569 | nl_langinfo_buf = xrealloc (nl_langinfo_buf, | |
2570 | nl_langinfo_len = need_len); | |
2571 | if (!GetLocaleInfo (cloc, w32item[item] | LOCALE_USE_CP_ACP, | |
2572 | nl_langinfo_buf, nl_langinfo_len)) | |
2573 | nl_langinfo_buf[0] = 0; | |
2574 | else if (item == CODESET) | |
2575 | { | |
2576 | if (strcmp (nl_langinfo_buf, "0") == 0 /* CP_ACP */ | |
2577 | || strcmp (nl_langinfo_buf, "1") == 0) /* CP_OEMCP */ | |
2578 | sprintf (nl_langinfo_buf, "cp%u", GetACP ()); | |
2579 | else | |
2580 | { | |
2581 | memmove (nl_langinfo_buf + 2, nl_langinfo_buf, | |
2582 | strlen (nl_langinfo_buf) + 1); | |
2583 | nl_langinfo_buf[0] = 'c'; | |
2584 | nl_langinfo_buf[1] = 'p'; | |
2585 | } | |
2586 | } | |
2587 | } | |
2588 | } | |
2589 | return nl_langinfo_buf; | |
2590 | } | |
2591 | #endif /* HAVE_LANGINFO_CODESET */ | |
b2fc9f3d | 2592 | |
33f09670 JR |
2593 | DEFUN ("w32-get-locale-info", Fw32_get_locale_info, |
2594 | Sw32_get_locale_info, 1, 2, 0, | |
2595 | doc: /* Return information about the Windows locale LCID. | |
2596 | By default, return a three letter locale code which encodes the default | |
35f36d65 | 2597 | language as the first two characters, and the country or regional variant |
33f09670 JR |
2598 | as the third letter. For example, ENU refers to `English (United States)', |
2599 | while ENC means `English (Canadian)'. | |
2600 | ||
2601 | If the optional argument LONGFORM is t, the long form of the locale | |
2602 | name is returned, e.g. `English (United States)' instead; if LONGFORM | |
2603 | is a number, it is interpreted as an LCTYPE constant and the corresponding | |
2604 | locale information is returned. | |
2605 | ||
2606 | If LCID (a 16-bit number) is not a valid locale, the result is nil. */) | |
5842a27b | 2607 | (Lisp_Object lcid, Lisp_Object longform) |
b2fc9f3d GV |
2608 | { |
2609 | int got_abbrev; | |
2610 | int got_full; | |
2611 | char abbrev_name[32] = { 0 }; | |
2612 | char full_name[256] = { 0 }; | |
2613 | ||
b7826503 | 2614 | CHECK_NUMBER (lcid); |
b2fc9f3d GV |
2615 | |
2616 | if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED)) | |
2617 | return Qnil; | |
2618 | ||
2619 | if (NILP (longform)) | |
2620 | { | |
2621 | got_abbrev = GetLocaleInfo (XINT (lcid), | |
2622 | LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP, | |
2623 | abbrev_name, sizeof (abbrev_name)); | |
2624 | if (got_abbrev) | |
2625 | return build_string (abbrev_name); | |
2626 | } | |
0eaf5926 | 2627 | else if (EQ (longform, Qt)) |
b2fc9f3d GV |
2628 | { |
2629 | got_full = GetLocaleInfo (XINT (lcid), | |
2630 | LOCALE_SLANGUAGE | LOCALE_USE_CP_ACP, | |
2631 | full_name, sizeof (full_name)); | |
2632 | if (got_full) | |
011a0143 | 2633 | return DECODE_SYSTEM (build_string (full_name)); |
b2fc9f3d | 2634 | } |
0eaf5926 GV |
2635 | else if (NUMBERP (longform)) |
2636 | { | |
2637 | got_full = GetLocaleInfo (XINT (lcid), | |
2638 | XINT (longform), | |
2639 | full_name, sizeof (full_name)); | |
96512555 EZ |
2640 | /* GetLocaleInfo's return value includes the terminating null |
2641 | character, when the returned information is a string, whereas | |
2642 | make_unibyte_string needs the string length without the | |
2643 | terminating null. */ | |
0eaf5926 | 2644 | if (got_full) |
96512555 | 2645 | return make_unibyte_string (full_name, got_full - 1); |
0eaf5926 | 2646 | } |
b2fc9f3d GV |
2647 | |
2648 | return Qnil; | |
2649 | } | |
2650 | ||
2651 | ||
33f09670 JR |
2652 | DEFUN ("w32-get-current-locale-id", Fw32_get_current_locale_id, |
2653 | Sw32_get_current_locale_id, 0, 0, 0, | |
2654 | doc: /* Return Windows locale id for current locale setting. | |
2655 | This is a numerical value; use `w32-get-locale-info' to convert to a | |
2656 | human-readable form. */) | |
5842a27b | 2657 | (void) |
b2fc9f3d GV |
2658 | { |
2659 | return make_number (GetThreadLocale ()); | |
2660 | } | |
2661 | ||
24f981c9 | 2662 | static DWORD |
b56ceb92 | 2663 | int_from_hex (char * s) |
ef79fbba GV |
2664 | { |
2665 | DWORD val = 0; | |
2666 | static char hex[] = "0123456789abcdefABCDEF"; | |
2667 | char * p; | |
2668 | ||
ed3751c8 | 2669 | while (*s && (p = strchr (hex, *s)) != NULL) |
ef79fbba GV |
2670 | { |
2671 | unsigned digit = p - hex; | |
2672 | if (digit > 15) | |
2673 | digit -= 6; | |
2674 | val = val * 16 + digit; | |
2675 | s++; | |
2676 | } | |
2677 | return val; | |
2678 | } | |
2679 | ||
2680 | /* We need to build a global list, since the EnumSystemLocale callback | |
2681 | function isn't given a context pointer. */ | |
2682 | Lisp_Object Vw32_valid_locale_ids; | |
2683 | ||
24f981c9 | 2684 | static BOOL CALLBACK |
b56ceb92 | 2685 | enum_locale_fn (LPTSTR localeNum) |
ef79fbba GV |
2686 | { |
2687 | DWORD id = int_from_hex (localeNum); | |
2688 | Vw32_valid_locale_ids = Fcons (make_number (id), Vw32_valid_locale_ids); | |
2689 | return TRUE; | |
2690 | } | |
2691 | ||
33f09670 JR |
2692 | DEFUN ("w32-get-valid-locale-ids", Fw32_get_valid_locale_ids, |
2693 | Sw32_get_valid_locale_ids, 0, 0, 0, | |
2694 | doc: /* Return list of all valid Windows locale ids. | |
2695 | Each id is a numerical value; use `w32-get-locale-info' to convert to a | |
2696 | human-readable form. */) | |
5842a27b | 2697 | (void) |
ef79fbba GV |
2698 | { |
2699 | Vw32_valid_locale_ids = Qnil; | |
2700 | ||
2701 | EnumSystemLocales (enum_locale_fn, LCID_SUPPORTED); | |
2702 | ||
2703 | Vw32_valid_locale_ids = Fnreverse (Vw32_valid_locale_ids); | |
2704 | return Vw32_valid_locale_ids; | |
2705 | } | |
2706 | ||
b2fc9f3d GV |
2707 | |
2708 | DEFUN ("w32-get-default-locale-id", Fw32_get_default_locale_id, Sw32_get_default_locale_id, 0, 1, 0, | |
33f09670 JR |
2709 | doc: /* Return Windows locale id for default locale setting. |
2710 | By default, the system default locale setting is returned; if the optional | |
2711 | parameter USERP is non-nil, the user default locale setting is returned. | |
2712 | This is a numerical value; use `w32-get-locale-info' to convert to a | |
2713 | human-readable form. */) | |
5842a27b | 2714 | (Lisp_Object userp) |
b2fc9f3d GV |
2715 | { |
2716 | if (NILP (userp)) | |
2717 | return make_number (GetSystemDefaultLCID ()); | |
2718 | return make_number (GetUserDefaultLCID ()); | |
2719 | } | |
2720 | ||
177c0ea7 | 2721 | |
b2fc9f3d | 2722 | DEFUN ("w32-set-current-locale", Fw32_set_current_locale, Sw32_set_current_locale, 1, 1, 0, |
33f09670 JR |
2723 | doc: /* Make Windows locale LCID be the current locale setting for Emacs. |
2724 | If successful, the new locale id is returned, otherwise nil. */) | |
5842a27b | 2725 | (Lisp_Object lcid) |
b2fc9f3d | 2726 | { |
b7826503 | 2727 | CHECK_NUMBER (lcid); |
b2fc9f3d GV |
2728 | |
2729 | if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED)) | |
2730 | return Qnil; | |
2731 | ||
2732 | if (!SetThreadLocale (XINT (lcid))) | |
2733 | return Qnil; | |
2734 | ||
ef79fbba GV |
2735 | /* Need to set input thread locale if present. */ |
2736 | if (dwWindowsThreadId) | |
2737 | /* Reply is not needed. */ | |
2738 | PostThreadMessage (dwWindowsThreadId, WM_EMACS_SETLOCALE, XINT (lcid), 0); | |
2739 | ||
b2fc9f3d GV |
2740 | return make_number (GetThreadLocale ()); |
2741 | } | |
2742 | ||
0eaf5926 GV |
2743 | |
2744 | /* We need to build a global list, since the EnumCodePages callback | |
2745 | function isn't given a context pointer. */ | |
2746 | Lisp_Object Vw32_valid_codepages; | |
2747 | ||
24f981c9 | 2748 | static BOOL CALLBACK |
b56ceb92 | 2749 | enum_codepage_fn (LPTSTR codepageNum) |
0eaf5926 GV |
2750 | { |
2751 | DWORD id = atoi (codepageNum); | |
2752 | Vw32_valid_codepages = Fcons (make_number (id), Vw32_valid_codepages); | |
2753 | return TRUE; | |
2754 | } | |
2755 | ||
33f09670 JR |
2756 | DEFUN ("w32-get-valid-codepages", Fw32_get_valid_codepages, |
2757 | Sw32_get_valid_codepages, 0, 0, 0, | |
2758 | doc: /* Return list of all valid Windows codepages. */) | |
5842a27b | 2759 | (void) |
0eaf5926 GV |
2760 | { |
2761 | Vw32_valid_codepages = Qnil; | |
2762 | ||
2763 | EnumSystemCodePages (enum_codepage_fn, CP_SUPPORTED); | |
2764 | ||
2765 | Vw32_valid_codepages = Fnreverse (Vw32_valid_codepages); | |
2766 | return Vw32_valid_codepages; | |
2767 | } | |
2768 | ||
2769 | ||
33f09670 JR |
2770 | DEFUN ("w32-get-console-codepage", Fw32_get_console_codepage, |
2771 | Sw32_get_console_codepage, 0, 0, 0, | |
2772 | doc: /* Return current Windows codepage for console input. */) | |
5842a27b | 2773 | (void) |
0eaf5926 GV |
2774 | { |
2775 | return make_number (GetConsoleCP ()); | |
2776 | } | |
2777 | ||
177c0ea7 | 2778 | |
33f09670 JR |
2779 | DEFUN ("w32-set-console-codepage", Fw32_set_console_codepage, |
2780 | Sw32_set_console_codepage, 1, 1, 0, | |
62356a1b EZ |
2781 | doc: /* Make Windows codepage CP be the codepage for Emacs tty keyboard input. |
2782 | This codepage setting affects keyboard input in tty mode. | |
33f09670 | 2783 | If successful, the new CP is returned, otherwise nil. */) |
5842a27b | 2784 | (Lisp_Object cp) |
0eaf5926 | 2785 | { |
b7826503 | 2786 | CHECK_NUMBER (cp); |
0eaf5926 GV |
2787 | |
2788 | if (!IsValidCodePage (XINT (cp))) | |
2789 | return Qnil; | |
2790 | ||
2791 | if (!SetConsoleCP (XINT (cp))) | |
2792 | return Qnil; | |
2793 | ||
2794 | return make_number (GetConsoleCP ()); | |
2795 | } | |
2796 | ||
2797 | ||
33f09670 JR |
2798 | DEFUN ("w32-get-console-output-codepage", Fw32_get_console_output_codepage, |
2799 | Sw32_get_console_output_codepage, 0, 0, 0, | |
2800 | doc: /* Return current Windows codepage for console output. */) | |
5842a27b | 2801 | (void) |
0eaf5926 GV |
2802 | { |
2803 | return make_number (GetConsoleOutputCP ()); | |
2804 | } | |
2805 | ||
177c0ea7 | 2806 | |
33f09670 JR |
2807 | DEFUN ("w32-set-console-output-codepage", Fw32_set_console_output_codepage, |
2808 | Sw32_set_console_output_codepage, 1, 1, 0, | |
62356a1b EZ |
2809 | doc: /* Make Windows codepage CP be the codepage for Emacs console output. |
2810 | This codepage setting affects display in tty mode. | |
33f09670 | 2811 | If successful, the new CP is returned, otherwise nil. */) |
5842a27b | 2812 | (Lisp_Object cp) |
0eaf5926 | 2813 | { |
b7826503 | 2814 | CHECK_NUMBER (cp); |
0eaf5926 GV |
2815 | |
2816 | if (!IsValidCodePage (XINT (cp))) | |
2817 | return Qnil; | |
2818 | ||
2819 | if (!SetConsoleOutputCP (XINT (cp))) | |
2820 | return Qnil; | |
2821 | ||
2822 | return make_number (GetConsoleOutputCP ()); | |
2823 | } | |
2824 | ||
2825 | ||
33f09670 JR |
2826 | DEFUN ("w32-get-codepage-charset", Fw32_get_codepage_charset, |
2827 | Sw32_get_codepage_charset, 1, 1, 0, | |
62356a1b | 2828 | doc: /* Return charset ID corresponding to codepage CP. |
33f09670 | 2829 | Returns nil if the codepage is not valid. */) |
5842a27b | 2830 | (Lisp_Object cp) |
0eaf5926 GV |
2831 | { |
2832 | CHARSETINFO info; | |
2833 | ||
b7826503 | 2834 | CHECK_NUMBER (cp); |
0eaf5926 GV |
2835 | |
2836 | if (!IsValidCodePage (XINT (cp))) | |
2837 | return Qnil; | |
2838 | ||
2839 | if (TranslateCharsetInfo ((DWORD *) XINT (cp), &info, TCI_SRCCODEPAGE)) | |
2840 | return make_number (info.ciCharset); | |
2841 | ||
2842 | return Qnil; | |
2843 | } | |
2844 | ||
2845 | ||
33f09670 JR |
2846 | DEFUN ("w32-get-valid-keyboard-layouts", Fw32_get_valid_keyboard_layouts, |
2847 | Sw32_get_valid_keyboard_layouts, 0, 0, 0, | |
2848 | doc: /* Return list of Windows keyboard languages and layouts. | |
2849 | The return value is a list of pairs of language id and layout id. */) | |
5842a27b | 2850 | (void) |
0eaf5926 GV |
2851 | { |
2852 | int num_layouts = GetKeyboardLayoutList (0, NULL); | |
2853 | HKL * layouts = (HKL *) alloca (num_layouts * sizeof (HKL)); | |
2854 | Lisp_Object obj = Qnil; | |
2855 | ||
2856 | if (GetKeyboardLayoutList (num_layouts, layouts) == num_layouts) | |
2857 | { | |
2858 | while (--num_layouts >= 0) | |
2859 | { | |
2860 | DWORD kl = (DWORD) layouts[num_layouts]; | |
2861 | ||
2862 | obj = Fcons (Fcons (make_number (kl & 0xffff), | |
2863 | make_number ((kl >> 16) & 0xffff)), | |
2864 | obj); | |
2865 | } | |
2866 | } | |
2867 | ||
2868 | return obj; | |
2869 | } | |
2870 | ||
2871 | ||
33f09670 JR |
2872 | DEFUN ("w32-get-keyboard-layout", Fw32_get_keyboard_layout, |
2873 | Sw32_get_keyboard_layout, 0, 0, 0, | |
2874 | doc: /* Return current Windows keyboard language and layout. | |
2875 | The return value is the cons of the language id and the layout id. */) | |
5842a27b | 2876 | (void) |
0eaf5926 GV |
2877 | { |
2878 | DWORD kl = (DWORD) GetKeyboardLayout (dwWindowsThreadId); | |
2879 | ||
2880 | return Fcons (make_number (kl & 0xffff), | |
2881 | make_number ((kl >> 16) & 0xffff)); | |
2882 | } | |
2883 | ||
177c0ea7 | 2884 | |
33f09670 JR |
2885 | DEFUN ("w32-set-keyboard-layout", Fw32_set_keyboard_layout, |
2886 | Sw32_set_keyboard_layout, 1, 1, 0, | |
2887 | doc: /* Make LAYOUT be the current keyboard layout for Emacs. | |
2888 | The keyboard layout setting affects interpretation of keyboard input. | |
2889 | If successful, the new layout id is returned, otherwise nil. */) | |
5842a27b | 2890 | (Lisp_Object layout) |
0eaf5926 GV |
2891 | { |
2892 | DWORD kl; | |
2893 | ||
b7826503 | 2894 | CHECK_CONS (layout); |
f4532092 AI |
2895 | CHECK_NUMBER_CAR (layout); |
2896 | CHECK_NUMBER_CDR (layout); | |
0eaf5926 | 2897 | |
8e713be6 KR |
2898 | kl = (XINT (XCAR (layout)) & 0xffff) |
2899 | | (XINT (XCDR (layout)) << 16); | |
0eaf5926 GV |
2900 | |
2901 | /* Synchronize layout with input thread. */ | |
2902 | if (dwWindowsThreadId) | |
2903 | { | |
2904 | if (PostThreadMessage (dwWindowsThreadId, WM_EMACS_SETKEYBOARDLAYOUT, | |
2905 | (WPARAM) kl, 0)) | |
2906 | { | |
2907 | MSG msg; | |
2908 | GetMessage (&msg, NULL, WM_EMACS_DONE, WM_EMACS_DONE); | |
2909 | ||
2910 | if (msg.wParam == 0) | |
2911 | return Qnil; | |
2912 | } | |
2913 | } | |
2914 | else if (!ActivateKeyboardLayout ((HKL) kl, 0)) | |
2915 | return Qnil; | |
2916 | ||
2917 | return Fw32_get_keyboard_layout (); | |
2918 | } | |
2919 | ||
b2fc9f3d | 2920 | \f |
b56ceb92 JB |
2921 | void |
2922 | syms_of_ntproc (void) | |
93fdf2f8 | 2923 | { |
51128692 JR |
2924 | DEFSYM (Qhigh, "high"); |
2925 | DEFSYM (Qlow, "low"); | |
b2fc9f3d | 2926 | |
fbd6baed GV |
2927 | defsubr (&Sw32_has_winsock); |
2928 | defsubr (&Sw32_unload_winsock); | |
7d701334 | 2929 | |
b2fc9f3d GV |
2930 | defsubr (&Sw32_short_file_name); |
2931 | defsubr (&Sw32_long_file_name); | |
2932 | defsubr (&Sw32_set_process_priority); | |
2933 | defsubr (&Sw32_get_locale_info); | |
2934 | defsubr (&Sw32_get_current_locale_id); | |
2935 | defsubr (&Sw32_get_default_locale_id); | |
ef79fbba | 2936 | defsubr (&Sw32_get_valid_locale_ids); |
b2fc9f3d | 2937 | defsubr (&Sw32_set_current_locale); |
a11e68d0 | 2938 | |
0eaf5926 GV |
2939 | defsubr (&Sw32_get_console_codepage); |
2940 | defsubr (&Sw32_set_console_codepage); | |
2941 | defsubr (&Sw32_get_console_output_codepage); | |
2942 | defsubr (&Sw32_set_console_output_codepage); | |
2943 | defsubr (&Sw32_get_valid_codepages); | |
2944 | defsubr (&Sw32_get_codepage_charset); | |
2945 | ||
2946 | defsubr (&Sw32_get_valid_keyboard_layouts); | |
2947 | defsubr (&Sw32_get_keyboard_layout); | |
2948 | defsubr (&Sw32_set_keyboard_layout); | |
2949 | ||
29208e82 | 2950 | DEFVAR_LISP ("w32-quote-process-args", Vw32_quote_process_args, |
33f09670 JR |
2951 | doc: /* Non-nil enables quoting of process arguments to ensure correct parsing. |
2952 | Because Windows does not directly pass argv arrays to child processes, | |
2953 | programs have to reconstruct the argv array by parsing the command | |
2954 | line string. For an argument to contain a space, it must be enclosed | |
2955 | in double quotes or it will be parsed as multiple arguments. | |
2956 | ||
2957 | If the value is a character, that character will be used to escape any | |
2958 | quote characters that appear, otherwise a suitable escape character | |
2959 | will be chosen based on the type of the program. */); | |
b2fc9f3d | 2960 | Vw32_quote_process_args = Qt; |
817abdf6 | 2961 | |
fbd6baed | 2962 | DEFVAR_LISP ("w32-start-process-show-window", |
29208e82 | 2963 | Vw32_start_process_show_window, |
33f09670 JR |
2964 | doc: /* When nil, new child processes hide their windows. |
2965 | When non-nil, they show their window in the method of their choice. | |
2966 | This variable doesn't affect GUI applications, which will never be hidden. */); | |
fbd6baed | 2967 | Vw32_start_process_show_window = Qnil; |
0ecf7d36 | 2968 | |
b2fc9f3d | 2969 | DEFVAR_LISP ("w32-start-process-share-console", |
29208e82 | 2970 | Vw32_start_process_share_console, |
33f09670 JR |
2971 | doc: /* When nil, new child processes are given a new console. |
2972 | When non-nil, they share the Emacs console; this has the limitation of | |
804d894a | 2973 | allowing only one DOS subprocess to run at a time (whether started directly |
33f09670 JR |
2974 | or indirectly by Emacs), and preventing Emacs from cleanly terminating the |
2975 | subprocess group, but may allow Emacs to interrupt a subprocess that doesn't | |
2976 | otherwise respond to interrupts from Emacs. */); | |
b2fc9f3d GV |
2977 | Vw32_start_process_share_console = Qnil; |
2978 | ||
82e7c0a9 | 2979 | DEFVAR_LISP ("w32-start-process-inherit-error-mode", |
29208e82 | 2980 | Vw32_start_process_inherit_error_mode, |
33f09670 JR |
2981 | doc: /* When nil, new child processes revert to the default error mode. |
2982 | When non-nil, they inherit their error mode setting from Emacs, which stops | |
2983 | them blocking when trying to access unmounted drives etc. */); | |
82e7c0a9 AI |
2984 | Vw32_start_process_inherit_error_mode = Qt; |
2985 | ||
29208e82 | 2986 | DEFVAR_INT ("w32-pipe-read-delay", w32_pipe_read_delay, |
33f09670 JR |
2987 | doc: /* Forced delay before reading subprocess output. |
2988 | This is done to improve the buffering of subprocess output, by | |
2989 | avoiding the inefficiency of frequently reading small amounts of data. | |
2990 | ||
2991 | If positive, the value is the number of milliseconds to sleep before | |
2992 | reading the subprocess output. If negative, the magnitude is the number | |
2993 | of time slices to wait (effectively boosting the priority of the child | |
2994 | process temporarily). A value of zero disables waiting entirely. */); | |
5322f50b | 2995 | w32_pipe_read_delay = 50; |
0c04091e | 2996 | |
29208e82 | 2997 | DEFVAR_LISP ("w32-downcase-file-names", Vw32_downcase_file_names, |
33f09670 JR |
2998 | doc: /* Non-nil means convert all-upper case file names to lower case. |
2999 | This applies when performing completions and file name expansion. | |
3000 | Note that the value of this setting also affects remote file names, | |
3001 | so you probably don't want to set to non-nil if you use case-sensitive | |
177c0ea7 | 3002 | filesystems via ange-ftp. */); |
fbd6baed | 3003 | Vw32_downcase_file_names = Qnil; |
b2fc9f3d GV |
3004 | |
3005 | #if 0 | |
29208e82 | 3006 | DEFVAR_LISP ("w32-generate-fake-inodes", Vw32_generate_fake_inodes, |
33f09670 JR |
3007 | doc: /* Non-nil means attempt to fake realistic inode values. |
3008 | This works by hashing the truename of files, and should detect | |
3009 | aliasing between long and short (8.3 DOS) names, but can have | |
4c36be58 | 3010 | false positives because of hash collisions. Note that determining |
33f09670 | 3011 | the truename of a file can be slow. */); |
b2fc9f3d GV |
3012 | Vw32_generate_fake_inodes = Qnil; |
3013 | #endif | |
3014 | ||
29208e82 | 3015 | DEFVAR_LISP ("w32-get-true-file-attributes", Vw32_get_true_file_attributes, |
ed4c17bb EZ |
3016 | doc: /* Non-nil means determine accurate file attributes in `file-attributes'. |
3017 | This option controls whether to issue additional system calls to determine | |
017dab84 | 3018 | accurate link counts, file type, and ownership information. It is more |
ed4c17bb | 3019 | useful for files on NTFS volumes, where hard links and file security are |
017dab84 | 3020 | supported, than on volumes of the FAT family. |
ed4c17bb EZ |
3021 | |
3022 | Without these system calls, link count will always be reported as 1 and file | |
3023 | ownership will be attributed to the current user. | |
3024 | The default value `local' means only issue these system calls for files | |
3025 | on local fixed drives. A value of nil means never issue them. | |
3026 | Any other non-nil value means do this even on remote and removable drives | |
3027 | where the performance impact may be noticeable even on modern hardware. */); | |
2fa4f090 | 3028 | Vw32_get_true_file_attributes = Qlocal; |
af621bc3 EZ |
3029 | |
3030 | staticpro (&Vw32_valid_locale_ids); | |
3031 | staticpro (&Vw32_valid_codepages); | |
93fdf2f8 | 3032 | } |
42a7e7f1 | 3033 | /* end of w32proc.c */ |