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 | ||
279066b2 | 24 | #include <mingw_time.h> |
6cdfb6e6 RS |
25 | #include <stdio.h> |
26 | #include <stdlib.h> | |
27 | #include <errno.h> | |
a68089e4 | 28 | #include <ctype.h> |
6cdfb6e6 | 29 | #include <io.h> |
c519b5e1 | 30 | #include <fcntl.h> |
6cdfb6e6 | 31 | #include <signal.h> |
51f635c4 | 32 | #include <sys/file.h> |
17788cb3 | 33 | #include <mbstring.h> |
6cdfb6e6 | 34 | |
c519b5e1 | 35 | /* must include CRT headers *before* config.h */ |
4838e624 | 36 | #include <config.h> |
4838e624 | 37 | |
c519b5e1 GV |
38 | #undef signal |
39 | #undef wait | |
40 | #undef spawnve | |
41 | #undef select | |
42 | #undef kill | |
43 | ||
6cdfb6e6 | 44 | #include <windows.h> |
42c95ffb AI |
45 | #ifdef __GNUC__ |
46 | /* This definition is missing from mingw32 headers. */ | |
ed3751c8 | 47 | extern BOOL WINAPI IsValidLocale (LCID, DWORD); |
42c95ffb | 48 | #endif |
6cdfb6e6 | 49 | |
d613418b EZ |
50 | #ifdef HAVE_LANGINFO_CODESET |
51 | #include <nl_types.h> | |
52 | #include <langinfo.h> | |
53 | #endif | |
54 | ||
6cdfb6e6 | 55 | #include "lisp.h" |
489f9371 | 56 | #include "w32.h" |
501199a3 | 57 | #include "w32common.h" |
b2fc9f3d | 58 | #include "w32heap.h" |
6cdfb6e6 | 59 | #include "systime.h" |
3d7eead0 GV |
60 | #include "syswait.h" |
61 | #include "process.h" | |
e7c15bba | 62 | #include "syssignal.h" |
ef79fbba | 63 | #include "w32term.h" |
f481eb31 | 64 | #include "dispextern.h" /* for xstrcasecmp */ |
b23077df | 65 | #include "coding.h" |
3d7eead0 | 66 | |
8747ac3f EZ |
67 | #define RVA_TO_PTR(var,section,filedata) \ |
68 | ((void *)((section)->PointerToRawData \ | |
62aba0d4 | 69 | + ((DWORD_PTR)(var) - (section)->VirtualAddress) \ |
8747ac3f EZ |
70 | + (filedata).file_base)) |
71 | ||
b2fc9f3d | 72 | Lisp_Object Qhigh, Qlow; |
817abdf6 | 73 | |
6cdfb6e6 RS |
74 | /* Signal handlers...SIG_DFL == 0 so this is initialized correctly. */ |
75 | static signal_handler sig_handlers[NSIG]; | |
76 | ||
c06c382a EZ |
77 | static sigset_t sig_mask; |
78 | ||
79 | static CRITICAL_SECTION crit_sig; | |
80 | ||
16b22fef | 81 | /* Improve on the CRT 'signal' implementation so that we could record |
c06c382a | 82 | the SIGCHLD handler and fake interval timers. */ |
177c0ea7 | 83 | signal_handler |
c519b5e1 | 84 | sys_signal (int sig, signal_handler handler) |
6cdfb6e6 RS |
85 | { |
86 | signal_handler old; | |
177c0ea7 | 87 | |
16b22fef | 88 | /* SIGCHLD is needed for supporting subprocesses, see sys_kill |
c06c382a EZ |
89 | below. SIGALRM and SIGPROF are used by setitimer. All the |
90 | others are the only ones supported by the MS runtime. */ | |
16b22fef | 91 | if (!(sig == SIGCHLD || sig == SIGSEGV || sig == SIGILL |
c06c382a EZ |
92 | || sig == SIGFPE || sig == SIGABRT || sig == SIGTERM |
93 | || sig == SIGALRM || sig == SIGPROF)) | |
6cdfb6e6 RS |
94 | { |
95 | errno = EINVAL; | |
96 | return SIG_ERR; | |
97 | } | |
98 | old = sig_handlers[sig]; | |
16b22fef EZ |
99 | /* SIGABRT is treated specially because w32.c installs term_ntproc |
100 | as its handler, so we don't want to override that afterwards. | |
101 | Aborting Emacs works specially anyway: either by calling | |
102 | emacs_abort directly or through terminate_due_to_signal, which | |
103 | calls emacs_abort through emacs_raise. */ | |
104 | if (!(sig == SIGABRT && old == term_ntproc)) | |
105 | { | |
106 | sig_handlers[sig] = handler; | |
c06c382a | 107 | if (!(sig == SIGCHLD || sig == SIGALRM || sig == SIGPROF)) |
16b22fef EZ |
108 | signal (sig, handler); |
109 | } | |
6cdfb6e6 RS |
110 | return old; |
111 | } | |
112 | ||
3e6d6928 EZ |
113 | /* Emulate sigaction. */ |
114 | int | |
115 | sigaction (int sig, const struct sigaction *act, struct sigaction *oact) | |
116 | { | |
16b22fef EZ |
117 | signal_handler old = SIG_DFL; |
118 | int retval = 0; | |
119 | ||
120 | if (act) | |
121 | old = sys_signal (sig, act->sa_handler); | |
122 | else if (oact) | |
123 | old = sig_handlers[sig]; | |
3e6d6928 | 124 | |
16b22fef | 125 | if (old == SIG_ERR) |
3e6d6928 EZ |
126 | { |
127 | errno = EINVAL; | |
16b22fef | 128 | retval = -1; |
3e6d6928 | 129 | } |
3e6d6928 EZ |
130 | if (oact) |
131 | { | |
132 | oact->sa_handler = old; | |
133 | oact->sa_flags = 0; | |
134 | oact->sa_mask = empty_mask; | |
135 | } | |
16b22fef | 136 | return retval; |
3e6d6928 EZ |
137 | } |
138 | ||
c06c382a EZ |
139 | /* Emulate signal sets and blocking of signals used by timers. */ |
140 | ||
141 | int | |
142 | sigemptyset (sigset_t *set) | |
143 | { | |
144 | *set = 0; | |
145 | return 0; | |
146 | } | |
147 | ||
148 | int | |
149 | sigaddset (sigset_t *set, int signo) | |
150 | { | |
151 | if (!set) | |
152 | { | |
153 | errno = EINVAL; | |
154 | return -1; | |
155 | } | |
156 | if (signo < 0 || signo >= NSIG) | |
157 | { | |
158 | errno = EINVAL; | |
159 | return -1; | |
160 | } | |
161 | ||
162 | *set |= (1U << signo); | |
163 | ||
164 | return 0; | |
165 | } | |
166 | ||
167 | int | |
168 | sigfillset (sigset_t *set) | |
169 | { | |
170 | if (!set) | |
171 | { | |
172 | errno = EINVAL; | |
173 | return -1; | |
174 | } | |
175 | ||
176 | *set = 0xFFFFFFFF; | |
177 | return 0; | |
178 | } | |
179 | ||
180 | int | |
181 | sigprocmask (int how, const sigset_t *set, sigset_t *oset) | |
182 | { | |
183 | if (!(how == SIG_BLOCK || how == SIG_UNBLOCK || how == SIG_SETMASK)) | |
184 | { | |
185 | errno = EINVAL; | |
186 | return -1; | |
187 | } | |
188 | ||
189 | if (oset) | |
190 | *oset = sig_mask; | |
191 | ||
192 | if (!set) | |
193 | return 0; | |
194 | ||
195 | switch (how) | |
196 | { | |
197 | case SIG_BLOCK: | |
198 | sig_mask |= *set; | |
199 | break; | |
200 | case SIG_SETMASK: | |
201 | sig_mask = *set; | |
202 | break; | |
203 | case SIG_UNBLOCK: | |
204 | /* FIXME: Catch signals that are blocked and reissue them when | |
205 | they are unblocked. Important for SIGALRM and SIGPROF only. */ | |
206 | sig_mask &= ~(*set); | |
207 | break; | |
208 | } | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
213 | int | |
214 | pthread_sigmask (int how, const sigset_t *set, sigset_t *oset) | |
215 | { | |
216 | if (sigprocmask (how, set, oset) == -1) | |
217 | return EINVAL; | |
218 | return 0; | |
219 | } | |
220 | ||
221 | int | |
222 | sigismember (const sigset_t *set, int signo) | |
223 | { | |
224 | if (signo < 0 || signo >= NSIG) | |
225 | { | |
226 | errno = EINVAL; | |
227 | return -1; | |
228 | } | |
229 | if (signo > sizeof (*set) * BITS_PER_CHAR) | |
230 | emacs_abort (); | |
231 | ||
232 | return (*set & (1U << signo)) != 0; | |
233 | } | |
234 | ||
dd0333b6 PE |
235 | pid_t |
236 | getpgrp (void) | |
c06c382a | 237 | { |
dd0333b6 | 238 | return getpid (); |
c06c382a EZ |
239 | } |
240 | ||
7e8b50d9 | 241 | pid_t |
dd0333b6 | 242 | tcgetpgrp (int fd) |
7e8b50d9 EZ |
243 | { |
244 | return getpid (); | |
245 | } | |
246 | ||
247 | int | |
248 | setpgid (pid_t pid, pid_t pgid) | |
249 | { | |
250 | return 0; | |
251 | } | |
252 | ||
dd0333b6 PE |
253 | pid_t |
254 | setsid (void) | |
255 | { | |
256 | return getpid (); | |
257 | } | |
258 | ||
c06c382a EZ |
259 | /* Emulations of interval timers. |
260 | ||
261 | Limitations: only ITIMER_REAL and ITIMER_PROF are supported. | |
262 | ||
263 | Implementation: a separate thread is started for each timer type, | |
264 | the thread calls the appropriate signal handler when the timer | |
265 | expires, after stopping the thread which installed the timer. */ | |
266 | ||
c06c382a | 267 | struct itimer_data { |
2e612797 EZ |
268 | volatile ULONGLONG expire; |
269 | volatile ULONGLONG reload; | |
270 | volatile int terminate; | |
c06c382a EZ |
271 | int type; |
272 | HANDLE caller_thread; | |
273 | HANDLE timer_thread; | |
274 | }; | |
275 | ||
6c16c13e | 276 | static ULONGLONG ticks_now; |
c06c382a | 277 | static struct itimer_data real_itimer, prof_itimer; |
6c16c13e | 278 | static ULONGLONG clocks_min; |
f0e5f225 EZ |
279 | /* If non-zero, itimers are disabled. Used during shutdown, when we |
280 | delete the critical sections used by the timer threads. */ | |
281 | static int disable_itimers; | |
c06c382a EZ |
282 | |
283 | static CRITICAL_SECTION crit_real, crit_prof; | |
284 | ||
15cc05e9 | 285 | /* GetThreadTimes is not available on Windows 9X and possibly also on 2K. */ |
6c16c13e EZ |
286 | typedef BOOL (WINAPI *GetThreadTimes_Proc) ( |
287 | HANDLE hThread, | |
288 | LPFILETIME lpCreationTime, | |
289 | LPFILETIME lpExitTime, | |
290 | LPFILETIME lpKernelTime, | |
291 | LPFILETIME lpUserTime); | |
292 | ||
293 | static GetThreadTimes_Proc s_pfn_Get_Thread_Times; | |
294 | ||
640bf8ad EZ |
295 | #define MAX_SINGLE_SLEEP 30 |
296 | #define TIMER_TICKS_PER_SEC 1000 | |
297 | ||
6c16c13e EZ |
298 | /* Return a suitable time value, in 1-ms units, for THREAD, a handle |
299 | to a thread. If THREAD is NULL or an invalid handle, return the | |
300 | current wall-clock time since January 1, 1601 (UTC). Otherwise, | |
301 | return the sum of kernel and user times used by THREAD since it was | |
302 | created, plus its creation time. */ | |
303 | static ULONGLONG | |
304 | w32_get_timer_time (HANDLE thread) | |
305 | { | |
306 | ULONGLONG retval; | |
307 | int use_system_time = 1; | |
640bf8ad EZ |
308 | /* The functions below return times in 100-ns units. */ |
309 | const int tscale = 10 * TIMER_TICKS_PER_SEC; | |
6c16c13e EZ |
310 | |
311 | if (thread && thread != INVALID_HANDLE_VALUE | |
312 | && s_pfn_Get_Thread_Times != NULL) | |
313 | { | |
314 | FILETIME creation_ftime, exit_ftime, kernel_ftime, user_ftime; | |
315 | ULARGE_INTEGER temp_creation, temp_kernel, temp_user; | |
316 | ||
317 | if (s_pfn_Get_Thread_Times (thread, &creation_ftime, &exit_ftime, | |
318 | &kernel_ftime, &user_ftime)) | |
319 | { | |
320 | use_system_time = 0; | |
321 | temp_creation.LowPart = creation_ftime.dwLowDateTime; | |
322 | temp_creation.HighPart = creation_ftime.dwHighDateTime; | |
323 | temp_kernel.LowPart = kernel_ftime.dwLowDateTime; | |
324 | temp_kernel.HighPart = kernel_ftime.dwHighDateTime; | |
325 | temp_user.LowPart = user_ftime.dwLowDateTime; | |
326 | temp_user.HighPart = user_ftime.dwHighDateTime; | |
327 | retval = | |
640bf8ad EZ |
328 | temp_creation.QuadPart / tscale + temp_kernel.QuadPart / tscale |
329 | + temp_user.QuadPart / tscale; | |
6c16c13e EZ |
330 | } |
331 | else | |
332 | DebPrint (("GetThreadTimes failed with error code %lu\n", | |
333 | GetLastError ())); | |
334 | } | |
c06c382a | 335 | |
6c16c13e EZ |
336 | if (use_system_time) |
337 | { | |
338 | FILETIME current_ftime; | |
339 | ULARGE_INTEGER temp; | |
340 | ||
341 | GetSystemTimeAsFileTime (¤t_ftime); | |
342 | ||
343 | temp.LowPart = current_ftime.dwLowDateTime; | |
344 | temp.HighPart = current_ftime.dwHighDateTime; | |
345 | ||
640bf8ad | 346 | retval = temp.QuadPart / tscale; |
6c16c13e EZ |
347 | } |
348 | ||
349 | return retval; | |
350 | } | |
351 | ||
6c16c13e | 352 | /* Thread function for a timer thread. */ |
c06c382a EZ |
353 | static DWORD WINAPI |
354 | timer_loop (LPVOID arg) | |
355 | { | |
356 | struct itimer_data *itimer = (struct itimer_data *)arg; | |
357 | int which = itimer->type; | |
358 | int sig = (which == ITIMER_REAL) ? SIGALRM : SIGPROF; | |
359 | CRITICAL_SECTION *crit = (which == ITIMER_REAL) ? &crit_real : &crit_prof; | |
640bf8ad | 360 | const DWORD max_sleep = MAX_SINGLE_SLEEP * 1000 / TIMER_TICKS_PER_SEC; |
6c16c13e | 361 | HANDLE hth = (which == ITIMER_REAL) ? NULL : itimer->caller_thread; |
c06c382a EZ |
362 | |
363 | while (1) | |
364 | { | |
365 | DWORD sleep_time; | |
366 | signal_handler handler; | |
6c16c13e | 367 | ULONGLONG now, expire, reload; |
c06c382a EZ |
368 | |
369 | /* Load new values if requested by setitimer. */ | |
370 | EnterCriticalSection (crit); | |
371 | expire = itimer->expire; | |
372 | reload = itimer->reload; | |
373 | LeaveCriticalSection (crit); | |
374 | if (itimer->terminate) | |
375 | return 0; | |
376 | ||
6c16c13e | 377 | if (expire == 0) |
c06c382a EZ |
378 | { |
379 | /* We are idle. */ | |
380 | Sleep (max_sleep); | |
381 | continue; | |
382 | } | |
383 | ||
6c16c13e | 384 | if (expire > (now = w32_get_timer_time (hth))) |
c06c382a EZ |
385 | sleep_time = expire - now; |
386 | else | |
387 | sleep_time = 0; | |
388 | /* Don't sleep too long at a time, to be able to see the | |
389 | termination flag without too long a delay. */ | |
390 | while (sleep_time > max_sleep) | |
391 | { | |
392 | if (itimer->terminate) | |
393 | return 0; | |
394 | Sleep (max_sleep); | |
6c16c13e | 395 | EnterCriticalSection (crit); |
c06c382a | 396 | expire = itimer->expire; |
6c16c13e EZ |
397 | LeaveCriticalSection (crit); |
398 | sleep_time = | |
399 | (expire > (now = w32_get_timer_time (hth))) ? expire - now : 0; | |
c06c382a EZ |
400 | } |
401 | if (itimer->terminate) | |
402 | return 0; | |
403 | if (sleep_time > 0) | |
404 | { | |
640bf8ad | 405 | Sleep (sleep_time * 1000 / TIMER_TICKS_PER_SEC); |
c06c382a EZ |
406 | /* Always sleep past the expiration time, to make sure we |
407 | never call the handler _before_ the expiration time, | |
ace917bd | 408 | always slightly after it. Sleep(5) makes sure we don't |
6c16c13e EZ |
409 | hog the CPU by calling 'w32_get_timer_time' with high |
410 | frequency, and also let other threads work. */ | |
411 | while (w32_get_timer_time (hth) < expire) | |
ace917bd | 412 | Sleep (5); |
c06c382a EZ |
413 | } |
414 | ||
6c16c13e EZ |
415 | EnterCriticalSection (crit); |
416 | expire = itimer->expire; | |
417 | LeaveCriticalSection (crit); | |
418 | if (expire == 0) | |
c06c382a EZ |
419 | continue; |
420 | ||
421 | /* Time's up. */ | |
422 | handler = sig_handlers[sig]; | |
423 | if (!(handler == SIG_DFL || handler == SIG_IGN || handler == SIG_ERR) | |
424 | /* FIXME: Don't ignore masked signals. Instead, record that | |
425 | they happened and reissue them when the signal is | |
426 | unblocked. */ | |
427 | && !sigismember (&sig_mask, sig) | |
428 | /* Simulate masking of SIGALRM and SIGPROF when processing | |
429 | fatal signals. */ | |
430 | && !fatal_error_in_progress | |
431 | && itimer->caller_thread) | |
432 | { | |
433 | /* Simulate a signal delivered to the thread which installed | |
434 | the timer, by suspending that thread while the handler | |
435 | runs. */ | |
730b2d8f EZ |
436 | HANDLE th = itimer->caller_thread; |
437 | DWORD result = SuspendThread (th); | |
c06c382a EZ |
438 | |
439 | if (result == (DWORD)-1) | |
db9848e4 EZ |
440 | return 2; |
441 | ||
c06c382a | 442 | handler (sig); |
730b2d8f | 443 | ResumeThread (th); |
c06c382a EZ |
444 | } |
445 | ||
c06c382a EZ |
446 | /* Update expiration time and loop. */ |
447 | EnterCriticalSection (crit); | |
448 | expire = itimer->expire; | |
6c16c13e EZ |
449 | if (expire == 0) |
450 | { | |
451 | LeaveCriticalSection (crit); | |
452 | continue; | |
453 | } | |
c06c382a EZ |
454 | reload = itimer->reload; |
455 | if (reload > 0) | |
456 | { | |
6c16c13e | 457 | now = w32_get_timer_time (hth); |
c06c382a EZ |
458 | if (expire <= now) |
459 | { | |
6c16c13e | 460 | ULONGLONG lag = now - expire; |
c06c382a EZ |
461 | |
462 | /* If we missed some opportunities (presumably while | |
463 | sleeping or while the signal handler ran), skip | |
464 | them. */ | |
465 | if (lag > reload) | |
466 | expire = now - (lag % reload); | |
467 | ||
468 | expire += reload; | |
469 | } | |
470 | } | |
471 | else | |
472 | expire = 0; /* become idle */ | |
473 | itimer->expire = expire; | |
474 | LeaveCriticalSection (crit); | |
475 | } | |
476 | return 0; | |
477 | } | |
478 | ||
479 | static void | |
480 | stop_timer_thread (int which) | |
481 | { | |
482 | struct itimer_data *itimer = | |
483 | (which == ITIMER_REAL) ? &real_itimer : &prof_itimer; | |
484 | int i; | |
a65fbb5f EZ |
485 | DWORD err, exit_code = 255; |
486 | BOOL status; | |
c06c382a EZ |
487 | |
488 | /* Signal the thread that it should terminate. */ | |
489 | itimer->terminate = 1; | |
490 | ||
491 | if (itimer->timer_thread == NULL) | |
492 | return; | |
493 | ||
494 | /* Wait for the timer thread to terminate voluntarily, then kill it | |
495 | if it doesn't. This loop waits twice more than the maximum | |
496 | amount of time a timer thread sleeps, see above. */ | |
497 | for (i = 0; i < MAX_SINGLE_SLEEP / 5; i++) | |
498 | { | |
499 | if (!((status = GetExitCodeThread (itimer->timer_thread, &exit_code)) | |
500 | && exit_code == STILL_ACTIVE)) | |
501 | break; | |
502 | Sleep (10); | |
503 | } | |
504 | if ((status == FALSE && (err = GetLastError ()) == ERROR_INVALID_HANDLE) | |
505 | || exit_code == STILL_ACTIVE) | |
506 | { | |
507 | if (!(status == FALSE && err == ERROR_INVALID_HANDLE)) | |
508 | TerminateThread (itimer->timer_thread, 0); | |
509 | } | |
510 | ||
511 | /* Clean up. */ | |
512 | CloseHandle (itimer->timer_thread); | |
513 | itimer->timer_thread = NULL; | |
514 | if (itimer->caller_thread) | |
515 | { | |
516 | CloseHandle (itimer->caller_thread); | |
517 | itimer->caller_thread = NULL; | |
518 | } | |
519 | } | |
520 | ||
521 | /* This is called at shutdown time from term_ntproc. */ | |
522 | void | |
523 | term_timers (void) | |
524 | { | |
525 | if (real_itimer.timer_thread) | |
526 | stop_timer_thread (ITIMER_REAL); | |
527 | if (prof_itimer.timer_thread) | |
528 | stop_timer_thread (ITIMER_PROF); | |
529 | ||
f0e5f225 EZ |
530 | /* We are going to delete the critical sections, so timers cannot |
531 | work after this. */ | |
532 | disable_itimers = 1; | |
533 | ||
c06c382a EZ |
534 | DeleteCriticalSection (&crit_real); |
535 | DeleteCriticalSection (&crit_prof); | |
536 | DeleteCriticalSection (&crit_sig); | |
537 | } | |
538 | ||
539 | /* This is called at initialization time from init_ntproc. */ | |
540 | void | |
541 | init_timers (void) | |
542 | { | |
5c6ce1c7 | 543 | /* GetThreadTimes is not available on all versions of Windows, so |
6c16c13e EZ |
544 | need to probe for its availability dynamically, and call it |
545 | through a pointer. */ | |
546 | s_pfn_Get_Thread_Times = NULL; /* in case dumped Emacs comes with a value */ | |
547 | if (os_subtype != OS_9X) | |
548 | s_pfn_Get_Thread_Times = | |
549 | (GetThreadTimes_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"), | |
550 | "GetThreadTimes"); | |
551 | ||
c06c382a EZ |
552 | /* Make sure we start with zeroed out itimer structures, since |
553 | dumping may have left there traces of threads long dead. */ | |
554 | memset (&real_itimer, 0, sizeof real_itimer); | |
555 | memset (&prof_itimer, 0, sizeof prof_itimer); | |
556 | ||
557 | InitializeCriticalSection (&crit_real); | |
558 | InitializeCriticalSection (&crit_prof); | |
559 | InitializeCriticalSection (&crit_sig); | |
f0e5f225 EZ |
560 | |
561 | disable_itimers = 0; | |
c06c382a EZ |
562 | } |
563 | ||
564 | static int | |
565 | start_timer_thread (int which) | |
566 | { | |
567 | DWORD exit_code; | |
730b2d8f | 568 | HANDLE th; |
c06c382a EZ |
569 | struct itimer_data *itimer = |
570 | (which == ITIMER_REAL) ? &real_itimer : &prof_itimer; | |
571 | ||
572 | if (itimer->timer_thread | |
573 | && GetExitCodeThread (itimer->timer_thread, &exit_code) | |
574 | && exit_code == STILL_ACTIVE) | |
575 | return 0; | |
576 | ||
730b2d8f EZ |
577 | /* Clean up after possibly exited thread. */ |
578 | if (itimer->timer_thread) | |
579 | { | |
580 | CloseHandle (itimer->timer_thread); | |
581 | itimer->timer_thread = NULL; | |
582 | } | |
583 | if (itimer->caller_thread) | |
584 | { | |
585 | CloseHandle (itimer->caller_thread); | |
586 | itimer->caller_thread = NULL; | |
587 | } | |
588 | ||
c06c382a | 589 | /* Start a new thread. */ |
730b2d8f EZ |
590 | if (!DuplicateHandle (GetCurrentProcess (), GetCurrentThread (), |
591 | GetCurrentProcess (), &th, 0, FALSE, | |
592 | DUPLICATE_SAME_ACCESS)) | |
593 | { | |
594 | errno = ESRCH; | |
595 | return -1; | |
596 | } | |
c06c382a EZ |
597 | itimer->terminate = 0; |
598 | itimer->type = which; | |
730b2d8f | 599 | itimer->caller_thread = th; |
c06c382a EZ |
600 | /* Request that no more than 64KB of stack be reserved for this |
601 | thread, to avoid reserving too much memory, which would get in | |
602 | the way of threads we start to wait for subprocesses. See also | |
603 | new_child below. */ | |
604 | itimer->timer_thread = CreateThread (NULL, 64 * 1024, timer_loop, | |
605 | (void *)itimer, 0x00010000, NULL); | |
606 | ||
607 | if (!itimer->timer_thread) | |
608 | { | |
609 | CloseHandle (itimer->caller_thread); | |
610 | itimer->caller_thread = NULL; | |
611 | errno = EAGAIN; | |
612 | return -1; | |
613 | } | |
614 | ||
615 | /* This is needed to make sure that the timer thread running for | |
616 | profiling gets CPU as soon as the Sleep call terminates. */ | |
617 | if (which == ITIMER_PROF) | |
730b2d8f | 618 | SetThreadPriority (itimer->timer_thread, THREAD_PRIORITY_TIME_CRITICAL); |
c06c382a | 619 | |
3e6d6928 EZ |
620 | return 0; |
621 | } | |
622 | ||
c06c382a EZ |
623 | /* Most of the code of getitimer and setitimer (but not of their |
624 | subroutines) was shamelessly stolen from itimer.c in the DJGPP | |
625 | library, see www.delorie.com/djgpp. */ | |
626 | int | |
627 | getitimer (int which, struct itimerval *value) | |
628 | { | |
6c16c13e EZ |
629 | volatile ULONGLONG *t_expire; |
630 | volatile ULONGLONG *t_reload; | |
631 | ULONGLONG expire, reload; | |
c06c382a EZ |
632 | __int64 usecs; |
633 | CRITICAL_SECTION *crit; | |
6c16c13e | 634 | struct itimer_data *itimer; |
c06c382a | 635 | |
f0e5f225 EZ |
636 | if (disable_itimers) |
637 | return -1; | |
638 | ||
c06c382a EZ |
639 | if (!value) |
640 | { | |
641 | errno = EFAULT; | |
642 | return -1; | |
643 | } | |
644 | ||
645 | if (which != ITIMER_REAL && which != ITIMER_PROF) | |
646 | { | |
647 | errno = EINVAL; | |
648 | return -1; | |
649 | } | |
650 | ||
6c16c13e EZ |
651 | itimer = (which == ITIMER_REAL) ? &real_itimer : &prof_itimer; |
652 | ||
6c16c13e EZ |
653 | ticks_now = w32_get_timer_time ((which == ITIMER_REAL) |
654 | ? NULL | |
730b2d8f | 655 | : GetCurrentThread ()); |
6c16c13e EZ |
656 | |
657 | t_expire = &itimer->expire; | |
658 | t_reload = &itimer->reload; | |
c06c382a EZ |
659 | crit = (which == ITIMER_REAL) ? &crit_real : &crit_prof; |
660 | ||
661 | EnterCriticalSection (crit); | |
662 | reload = *t_reload; | |
663 | expire = *t_expire; | |
664 | LeaveCriticalSection (crit); | |
665 | ||
666 | if (expire) | |
667 | expire -= ticks_now; | |
668 | ||
640bf8ad EZ |
669 | value->it_value.tv_sec = expire / TIMER_TICKS_PER_SEC; |
670 | usecs = | |
671 | (expire % TIMER_TICKS_PER_SEC) * (__int64)1000000 / TIMER_TICKS_PER_SEC; | |
c06c382a | 672 | value->it_value.tv_usec = usecs; |
640bf8ad EZ |
673 | value->it_interval.tv_sec = reload / TIMER_TICKS_PER_SEC; |
674 | usecs = | |
675 | (reload % TIMER_TICKS_PER_SEC) * (__int64)1000000 / TIMER_TICKS_PER_SEC; | |
c06c382a EZ |
676 | value->it_interval.tv_usec= usecs; |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
681 | int | |
682 | setitimer(int which, struct itimerval *value, struct itimerval *ovalue) | |
683 | { | |
6c16c13e EZ |
684 | volatile ULONGLONG *t_expire, *t_reload; |
685 | ULONGLONG expire, reload, expire_old, reload_old; | |
c06c382a EZ |
686 | __int64 usecs; |
687 | CRITICAL_SECTION *crit; | |
6c16c13e | 688 | struct itimerval tem, *ptem; |
c06c382a | 689 | |
f0e5f225 EZ |
690 | if (disable_itimers) |
691 | return -1; | |
692 | ||
c06c382a EZ |
693 | /* Posix systems expect timer values smaller than the resolution of |
694 | the system clock be rounded up to the clock resolution. First | |
695 | time we are called, measure the clock tick resolution. */ | |
696 | if (!clocks_min) | |
697 | { | |
6c16c13e | 698 | ULONGLONG t1, t2; |
c06c382a | 699 | |
6c16c13e EZ |
700 | for (t1 = w32_get_timer_time (NULL); |
701 | (t2 = w32_get_timer_time (NULL)) == t1; ) | |
c06c382a EZ |
702 | ; |
703 | clocks_min = t2 - t1; | |
704 | } | |
705 | ||
706 | if (ovalue) | |
6c16c13e | 707 | ptem = ovalue; |
c06c382a | 708 | else |
6c16c13e | 709 | ptem = &tem; |
c06c382a | 710 | |
6c16c13e EZ |
711 | if (getitimer (which, ptem)) /* also sets ticks_now */ |
712 | return -1; /* errno already set */ | |
c06c382a EZ |
713 | |
714 | t_expire = | |
715 | (which == ITIMER_REAL) ? &real_itimer.expire : &prof_itimer.expire; | |
716 | t_reload = | |
717 | (which == ITIMER_REAL) ? &real_itimer.reload : &prof_itimer.reload; | |
718 | ||
719 | crit = (which == ITIMER_REAL) ? &crit_real : &crit_prof; | |
720 | ||
721 | if (!value | |
722 | || (value->it_value.tv_sec == 0 && value->it_value.tv_usec == 0)) | |
723 | { | |
724 | EnterCriticalSection (crit); | |
725 | /* Disable the timer. */ | |
726 | *t_expire = 0; | |
727 | *t_reload = 0; | |
728 | LeaveCriticalSection (crit); | |
729 | return 0; | |
730 | } | |
731 | ||
640bf8ad | 732 | reload = value->it_interval.tv_sec * TIMER_TICKS_PER_SEC; |
c06c382a EZ |
733 | |
734 | usecs = value->it_interval.tv_usec; | |
735 | if (value->it_interval.tv_sec == 0 | |
640bf8ad | 736 | && usecs && usecs * TIMER_TICKS_PER_SEC < clocks_min * 1000000) |
c06c382a EZ |
737 | reload = clocks_min; |
738 | else | |
739 | { | |
640bf8ad | 740 | usecs *= TIMER_TICKS_PER_SEC; |
c06c382a EZ |
741 | reload += usecs / 1000000; |
742 | } | |
743 | ||
640bf8ad | 744 | expire = value->it_value.tv_sec * TIMER_TICKS_PER_SEC; |
c06c382a EZ |
745 | usecs = value->it_value.tv_usec; |
746 | if (value->it_value.tv_sec == 0 | |
640bf8ad | 747 | && usecs * TIMER_TICKS_PER_SEC < clocks_min * 1000000) |
c06c382a EZ |
748 | expire = clocks_min; |
749 | else | |
750 | { | |
640bf8ad | 751 | usecs *= TIMER_TICKS_PER_SEC; |
c06c382a EZ |
752 | expire += usecs / 1000000; |
753 | } | |
754 | ||
755 | expire += ticks_now; | |
756 | ||
757 | EnterCriticalSection (crit); | |
758 | expire_old = *t_expire; | |
759 | reload_old = *t_reload; | |
760 | if (!(expire == expire_old && reload == reload_old)) | |
761 | { | |
762 | *t_reload = reload; | |
763 | *t_expire = expire; | |
764 | } | |
765 | LeaveCriticalSection (crit); | |
766 | ||
767 | return start_timer_thread (which); | |
768 | } | |
769 | ||
770 | int | |
771 | alarm (int seconds) | |
772 | { | |
4cdfbb89 EZ |
773 | #ifdef HAVE_SETITIMER |
774 | struct itimerval new_values, old_values; | |
c06c382a EZ |
775 | |
776 | new_values.it_value.tv_sec = seconds; | |
777 | new_values.it_value.tv_usec = 0; | |
778 | new_values.it_interval.tv_sec = new_values.it_interval.tv_usec = 0; | |
779 | ||
4cdfbb89 EZ |
780 | if (setitimer (ITIMER_REAL, &new_values, &old_values) < 0) |
781 | return 0; | |
782 | return old_values.it_value.tv_sec; | |
783 | #else | |
c06c382a | 784 | return seconds; |
4cdfbb89 | 785 | #endif |
c06c382a EZ |
786 | } |
787 | ||
c519b5e1 GV |
788 | /* Defined in <process.h> which conflicts with the local copy */ |
789 | #define _P_NOWAIT 1 | |
790 | ||
791 | /* Child process management list. */ | |
792 | int child_proc_count = 0; | |
793 | child_process child_procs[ MAX_CHILDREN ]; | |
c519b5e1 | 794 | |
24f981c9 | 795 | static DWORD WINAPI reader_thread (void *arg); |
c519b5e1 | 796 | |
6cdfb6e6 | 797 | /* Find an unused process slot. */ |
c519b5e1 | 798 | child_process * |
6cdfb6e6 RS |
799 | new_child (void) |
800 | { | |
801 | child_process *cp; | |
c519b5e1 | 802 | DWORD id; |
177c0ea7 | 803 | |
9d4f32e8 | 804 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
7efa3fb3 | 805 | if (!CHILD_ACTIVE (cp) && cp->procinfo.hProcess == NULL) |
e1dbe924 | 806 | goto Initialize; |
0e4e7b74 EZ |
807 | if (child_proc_count == MAX_CHILDREN) |
808 | { | |
ef862e20 | 809 | int i = 0; |
a7727d05 | 810 | child_process *dead_cp = NULL; |
ef862e20 | 811 | |
0e4e7b74 EZ |
812 | DebPrint (("new_child: No vacant slots, looking for dead processes\n")); |
813 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) | |
814 | if (!CHILD_ACTIVE (cp) && cp->procinfo.hProcess) | |
815 | { | |
816 | DWORD status = 0; | |
817 | ||
818 | if (!GetExitCodeProcess (cp->procinfo.hProcess, &status)) | |
819 | { | |
820 | DebPrint (("new_child.GetExitCodeProcess: error %lu for PID %lu\n", | |
821 | GetLastError (), cp->procinfo.dwProcessId)); | |
822 | status = STILL_ACTIVE; | |
823 | } | |
824 | if (status != STILL_ACTIVE | |
825 | || WaitForSingleObject (cp->procinfo.hProcess, 0) == WAIT_OBJECT_0) | |
826 | { | |
ef862e20 EZ |
827 | DebPrint (("new_child: Freeing slot of dead process %d, fd %d\n", |
828 | cp->procinfo.dwProcessId, cp->fd)); | |
0e4e7b74 EZ |
829 | CloseHandle (cp->procinfo.hProcess); |
830 | cp->procinfo.hProcess = NULL; | |
831 | CloseHandle (cp->procinfo.hThread); | |
832 | cp->procinfo.hThread = NULL; | |
ef862e20 EZ |
833 | /* Free up to 2 dead slots at a time, so that if we |
834 | have a lot of them, they will eventually all be | |
835 | freed when the tornado ends. */ | |
836 | if (i == 0) | |
837 | dead_cp = cp; | |
838 | else | |
a7727d05 | 839 | break; |
ef862e20 | 840 | i++; |
0e4e7b74 EZ |
841 | } |
842 | } | |
a7727d05 EZ |
843 | if (dead_cp) |
844 | { | |
845 | cp = dead_cp; | |
846 | goto Initialize; | |
847 | } | |
0e4e7b74 | 848 | } |
c519b5e1 GV |
849 | if (child_proc_count == MAX_CHILDREN) |
850 | return NULL; | |
851 | cp = &child_procs[child_proc_count++]; | |
852 | ||
e1dbe924 | 853 | Initialize: |
17ddfd15 EZ |
854 | /* Last opportunity to avoid leaking handles before we forget them |
855 | for good. */ | |
856 | if (cp->procinfo.hProcess) | |
857 | CloseHandle (cp->procinfo.hProcess); | |
858 | if (cp->procinfo.hThread) | |
859 | CloseHandle (cp->procinfo.hThread); | |
ed3751c8 | 860 | memset (cp, 0, sizeof (*cp)); |
c519b5e1 GV |
861 | cp->fd = -1; |
862 | cp->pid = -1; | |
863 | cp->procinfo.hProcess = NULL; | |
864 | cp->status = STATUS_READ_ERROR; | |
865 | ||
866 | /* use manual reset event so that select() will function properly */ | |
867 | cp->char_avail = CreateEvent (NULL, TRUE, FALSE, NULL); | |
868 | if (cp->char_avail) | |
869 | { | |
870 | cp->char_consumed = CreateEvent (NULL, FALSE, FALSE, NULL); | |
871 | if (cp->char_consumed) | |
872 | { | |
0d887c7d EZ |
873 | /* The 0x00010000 flag is STACK_SIZE_PARAM_IS_A_RESERVATION. |
874 | It means that the 64K stack we are requesting in the 2nd | |
875 | argument is how much memory should be reserved for the | |
876 | stack. If we don't use this flag, the memory requested | |
877 | by the 2nd argument is the amount actually _committed_, | |
878 | but Windows reserves 8MB of memory for each thread's | |
879 | stack. (The 8MB figure comes from the -stack | |
880 | command-line argument we pass to the linker when building | |
881 | Emacs, but that's because we need a large stack for | |
882 | Emacs's main thread.) Since we request 2GB of reserved | |
883 | memory at startup (see w32heap.c), which is close to the | |
884 | maximum memory available for a 32-bit process on Windows, | |
885 | the 8MB reservation for each thread causes failures in | |
886 | starting subprocesses, because we create a thread running | |
887 | reader_thread for each subprocess. As 8MB of stack is | |
888 | way too much for reader_thread, forcing Windows to | |
889 | reserve less wins the day. */ | |
890 | cp->thrd = CreateThread (NULL, 64 * 1024, reader_thread, cp, | |
891 | 0x00010000, &id); | |
c519b5e1 GV |
892 | if (cp->thrd) |
893 | return cp; | |
894 | } | |
895 | } | |
896 | delete_child (cp); | |
897 | return NULL; | |
898 | } | |
899 | ||
177c0ea7 | 900 | void |
c519b5e1 GV |
901 | delete_child (child_process *cp) |
902 | { | |
903 | int i; | |
904 | ||
905 | /* Should not be deleting a child that is still needed. */ | |
906 | for (i = 0; i < MAXDESC; i++) | |
907 | if (fd_info[i].cp == cp) | |
1088b922 | 908 | emacs_abort (); |
c519b5e1 | 909 | |
7efa3fb3 | 910 | if (!CHILD_ACTIVE (cp) && cp->procinfo.hProcess == NULL) |
c519b5e1 GV |
911 | return; |
912 | ||
913 | /* reap thread if necessary */ | |
914 | if (cp->thrd) | |
915 | { | |
916 | DWORD rc; | |
917 | ||
918 | if (GetExitCodeThread (cp->thrd, &rc) && rc == STILL_ACTIVE) | |
919 | { | |
920 | /* let the thread exit cleanly if possible */ | |
921 | cp->status = STATUS_READ_ERROR; | |
922 | SetEvent (cp->char_consumed); | |
a017b515 | 923 | #if 0 |
c5e87d10 | 924 | /* We used to forcibly terminate the thread here, but it |
a017b515 JR |
925 | is normally unnecessary, and in abnormal cases, the worst that |
926 | will happen is we have an extra idle thread hanging around | |
927 | waiting for the zombie process. */ | |
c519b5e1 GV |
928 | if (WaitForSingleObject (cp->thrd, 1000) != WAIT_OBJECT_0) |
929 | { | |
930 | DebPrint (("delete_child.WaitForSingleObject (thread) failed " | |
931 | "with %lu for fd %ld\n", GetLastError (), cp->fd)); | |
932 | TerminateThread (cp->thrd, 0); | |
933 | } | |
a017b515 | 934 | #endif |
c519b5e1 GV |
935 | } |
936 | CloseHandle (cp->thrd); | |
937 | cp->thrd = NULL; | |
938 | } | |
939 | if (cp->char_avail) | |
940 | { | |
941 | CloseHandle (cp->char_avail); | |
942 | cp->char_avail = NULL; | |
943 | } | |
944 | if (cp->char_consumed) | |
945 | { | |
946 | CloseHandle (cp->char_consumed); | |
947 | cp->char_consumed = NULL; | |
948 | } | |
949 | ||
950 | /* update child_proc_count (highest numbered slot in use plus one) */ | |
951 | if (cp == child_procs + child_proc_count - 1) | |
952 | { | |
953 | for (i = child_proc_count-1; i >= 0; i--) | |
7efa3fb3 EZ |
954 | if (CHILD_ACTIVE (&child_procs[i]) |
955 | || child_procs[i].procinfo.hProcess != NULL) | |
c519b5e1 GV |
956 | { |
957 | child_proc_count = i + 1; | |
958 | break; | |
959 | } | |
960 | } | |
961 | if (i < 0) | |
962 | child_proc_count = 0; | |
6cdfb6e6 RS |
963 | } |
964 | ||
965 | /* Find a child by pid. */ | |
966 | static child_process * | |
967 | find_child_pid (DWORD pid) | |
968 | { | |
969 | child_process *cp; | |
c519b5e1 | 970 | |
9d4f32e8 | 971 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
7efa3fb3 EZ |
972 | if ((CHILD_ACTIVE (cp) || cp->procinfo.hProcess != NULL) |
973 | && pid == cp->pid) | |
6cdfb6e6 RS |
974 | return cp; |
975 | return NULL; | |
976 | } | |
977 | ||
3f940c5a EZ |
978 | void |
979 | release_listen_threads (void) | |
980 | { | |
981 | int i; | |
982 | ||
983 | for (i = child_proc_count - 1; i >= 0; i--) | |
984 | { | |
985 | if (CHILD_ACTIVE (&child_procs[i]) | |
986 | && (fd_info[child_procs[i].fd].flags & FILE_LISTEN)) | |
987 | child_procs[i].status = STATUS_READ_ERROR; | |
988 | } | |
989 | } | |
6cdfb6e6 | 990 | |
c519b5e1 GV |
991 | /* Thread proc for child process and socket reader threads. Each thread |
992 | is normally blocked until woken by select() to check for input by | |
04bf5b65 | 993 | reading one char. When the read completes, char_avail is signaled |
c519b5e1 | 994 | to wake up the select emulator and the thread blocks itself again. */ |
24f981c9 | 995 | static DWORD WINAPI |
6cdfb6e6 RS |
996 | reader_thread (void *arg) |
997 | { | |
998 | child_process *cp; | |
177c0ea7 | 999 | |
6cdfb6e6 RS |
1000 | /* Our identity */ |
1001 | cp = (child_process *)arg; | |
177c0ea7 | 1002 | |
6cdfb6e6 | 1003 | /* We have to wait for the go-ahead before we can start */ |
b2fc9f3d | 1004 | if (cp == NULL |
f067b8ec JB |
1005 | || WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0 |
1006 | || cp->fd < 0) | |
c519b5e1 GV |
1007 | return 1; |
1008 | ||
6cdfb6e6 RS |
1009 | for (;;) |
1010 | { | |
c519b5e1 GV |
1011 | int rc; |
1012 | ||
299614f3 | 1013 | if (cp->fd >= 0 && fd_info[cp->fd].flags & FILE_LISTEN) |
f9125cde KS |
1014 | rc = _sys_wait_accept (cp->fd); |
1015 | else | |
1016 | rc = _sys_read_ahead (cp->fd); | |
c519b5e1 | 1017 | |
e7ae8039 EZ |
1018 | /* Don't bother waiting for the event if we already have been |
1019 | told to exit by delete_child. */ | |
1020 | if (cp->status == STATUS_READ_ERROR || !cp->char_avail) | |
1021 | break; | |
1022 | ||
c519b5e1 GV |
1023 | /* The name char_avail is a misnomer - it really just means the |
1024 | read-ahead has completed, whether successfully or not. */ | |
6cdfb6e6 RS |
1025 | if (!SetEvent (cp->char_avail)) |
1026 | { | |
ef862e20 EZ |
1027 | DebPrint (("reader_thread.SetEvent(0x%x) failed with %lu for fd %ld (PID %d)\n", |
1028 | (DWORD_PTR)cp->char_avail, GetLastError (), | |
1029 | cp->fd, cp->pid)); | |
c519b5e1 GV |
1030 | return 1; |
1031 | } | |
1032 | ||
1033 | if (rc == STATUS_READ_ERROR) | |
1034 | return 1; | |
177c0ea7 | 1035 | |
6cdfb6e6 | 1036 | /* If the read died, the child has died so let the thread die */ |
c519b5e1 | 1037 | if (rc == STATUS_READ_FAILED) |
6cdfb6e6 | 1038 | break; |
177c0ea7 | 1039 | |
e7ae8039 EZ |
1040 | /* Don't bother waiting for the acknowledge if we already have |
1041 | been told to exit by delete_child. */ | |
1042 | if (cp->status == STATUS_READ_ERROR || !cp->char_consumed) | |
1043 | break; | |
1044 | ||
6cdfb6e6 RS |
1045 | /* Wait until our input is acknowledged before reading again */ |
1046 | if (WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0) | |
1047 | { | |
1048 | DebPrint (("reader_thread.WaitForSingleObject failed with " | |
1049 | "%lu for fd %ld\n", GetLastError (), cp->fd)); | |
1050 | break; | |
1051 | } | |
e7ae8039 EZ |
1052 | /* delete_child sets status to STATUS_READ_ERROR when it wants |
1053 | us to exit. */ | |
299614f3 EZ |
1054 | if (cp->status == STATUS_READ_ERROR) |
1055 | break; | |
6cdfb6e6 RS |
1056 | } |
1057 | return 0; | |
1058 | } | |
1059 | ||
17788cb3 EZ |
1060 | /* To avoid Emacs changing directory, we just record here the |
1061 | directory the new process should start in. This is set just before | |
1062 | calling sys_spawnve, and is not generally valid at any other time. | |
1063 | Note that this directory's name is UTF-8 encoded. */ | |
b2fc9f3d GV |
1064 | static char * process_dir; |
1065 | ||
177c0ea7 | 1066 | static BOOL |
a55a5f3c | 1067 | create_child (char *exe, char *cmdline, char *env, int is_gui_app, |
c519b5e1 | 1068 | int * pPid, child_process *cp) |
6cdfb6e6 | 1069 | { |
6cdfb6e6 RS |
1070 | STARTUPINFO start; |
1071 | SECURITY_ATTRIBUTES sec_attrs; | |
42c95ffb | 1072 | #if 0 |
6cdfb6e6 | 1073 | SECURITY_DESCRIPTOR sec_desc; |
42c95ffb | 1074 | #endif |
82e7c0a9 | 1075 | DWORD flags; |
17788cb3 EZ |
1076 | char dir[ MAX_PATH ]; |
1077 | char *p; | |
177c0ea7 | 1078 | |
1088b922 | 1079 | if (cp == NULL) emacs_abort (); |
177c0ea7 | 1080 | |
6cdfb6e6 RS |
1081 | memset (&start, 0, sizeof (start)); |
1082 | start.cb = sizeof (start); | |
177c0ea7 | 1083 | |
58d4e829 | 1084 | #ifdef HAVE_NTGUI |
a55a5f3c | 1085 | if (NILP (Vw32_start_process_show_window) && !is_gui_app) |
0ecf7d36 RS |
1086 | start.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; |
1087 | else | |
1088 | start.dwFlags = STARTF_USESTDHANDLES; | |
58d4e829 GV |
1089 | start.wShowWindow = SW_HIDE; |
1090 | ||
1091 | start.hStdInput = GetStdHandle (STD_INPUT_HANDLE); | |
1092 | start.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE); | |
1093 | start.hStdError = GetStdHandle (STD_ERROR_HANDLE); | |
1094 | #endif /* HAVE_NTGUI */ | |
1095 | ||
42c95ffb | 1096 | #if 0 |
6cdfb6e6 RS |
1097 | /* Explicitly specify no security */ |
1098 | if (!InitializeSecurityDescriptor (&sec_desc, SECURITY_DESCRIPTOR_REVISION)) | |
c519b5e1 | 1099 | goto EH_Fail; |
6cdfb6e6 | 1100 | if (!SetSecurityDescriptorDacl (&sec_desc, TRUE, NULL, FALSE)) |
c519b5e1 | 1101 | goto EH_Fail; |
42c95ffb | 1102 | #endif |
6cdfb6e6 | 1103 | sec_attrs.nLength = sizeof (sec_attrs); |
42c95ffb | 1104 | sec_attrs.lpSecurityDescriptor = NULL /* &sec_desc */; |
6cdfb6e6 | 1105 | sec_attrs.bInheritHandle = FALSE; |
177c0ea7 | 1106 | |
17788cb3 EZ |
1107 | filename_to_ansi (process_dir, dir); |
1108 | /* Can't use unixtodos_filename here, since that needs its file name | |
1109 | argument encoded in UTF-8. OTOH, process_dir, which _is_ in | |
1110 | UTF-8, points, to the directory computed by our caller, and we | |
1111 | don't want to modify that, either. */ | |
1112 | for (p = dir; *p; p = CharNextA (p)) | |
1113 | if (*p == '/') | |
1114 | *p = '\\'; | |
82e7c0a9 AI |
1115 | |
1116 | flags = (!NILP (Vw32_start_process_share_console) | |
1117 | ? CREATE_NEW_PROCESS_GROUP | |
1118 | : CREATE_NEW_CONSOLE); | |
1119 | if (NILP (Vw32_start_process_inherit_error_mode)) | |
1120 | flags |= CREATE_DEFAULT_ERROR_MODE; | |
17788cb3 EZ |
1121 | if (!CreateProcessA (exe, cmdline, &sec_attrs, NULL, TRUE, |
1122 | flags, env, dir, &start, &cp->procinfo)) | |
c519b5e1 GV |
1123 | goto EH_Fail; |
1124 | ||
1125 | cp->pid = (int) cp->procinfo.dwProcessId; | |
1126 | ||
1127 | /* Hack for Windows 95, which assigns large (ie negative) pids */ | |
1128 | if (cp->pid < 0) | |
1129 | cp->pid = -cp->pid; | |
1130 | ||
c519b5e1 | 1131 | *pPid = cp->pid; |
b2fc9f3d | 1132 | |
6cdfb6e6 | 1133 | return TRUE; |
b2fc9f3d | 1134 | |
6cdfb6e6 | 1135 | EH_Fail: |
ed3751c8 | 1136 | DebPrint (("create_child.CreateProcess failed: %ld\n", GetLastError ());); |
6cdfb6e6 RS |
1137 | return FALSE; |
1138 | } | |
1139 | ||
5ec0337a | 1140 | /* create_child doesn't know what emacs's file handle will be for waiting |
6cdfb6e6 RS |
1141 | on output from the child, so we need to make this additional call |
1142 | to register the handle with the process | |
1143 | This way the select emulator knows how to match file handles with | |
1144 | entries in child_procs. */ | |
177c0ea7 | 1145 | void |
b0728617 | 1146 | register_child (pid_t pid, int fd) |
6cdfb6e6 RS |
1147 | { |
1148 | child_process *cp; | |
177c0ea7 | 1149 | |
b0728617 | 1150 | cp = find_child_pid ((DWORD)pid); |
6cdfb6e6 RS |
1151 | if (cp == NULL) |
1152 | { | |
1153 | DebPrint (("register_child unable to find pid %lu\n", pid)); | |
1154 | return; | |
1155 | } | |
177c0ea7 | 1156 | |
6cdfb6e6 RS |
1157 | #ifdef FULL_DEBUG |
1158 | DebPrint (("register_child registered fd %d with pid %lu\n", fd, pid)); | |
1159 | #endif | |
177c0ea7 | 1160 | |
6cdfb6e6 | 1161 | cp->fd = fd; |
6cdfb6e6 | 1162 | |
c519b5e1 GV |
1163 | /* thread is initially blocked until select is called; set status so |
1164 | that select will release thread */ | |
1165 | cp->status = STATUS_READ_ACKNOWLEDGED; | |
1166 | ||
1167 | /* attach child_process to fd_info */ | |
1168 | if (fd_info[fd].cp != NULL) | |
6cdfb6e6 | 1169 | { |
c519b5e1 | 1170 | DebPrint (("register_child: fd_info[%d] apparently in use!\n", fd)); |
1088b922 | 1171 | emacs_abort (); |
6cdfb6e6 | 1172 | } |
c519b5e1 GV |
1173 | |
1174 | fd_info[fd].cp = cp; | |
6cdfb6e6 RS |
1175 | } |
1176 | ||
7be7da6c | 1177 | /* Called from waitpid when a process exits. */ |
177c0ea7 | 1178 | static void |
c519b5e1 | 1179 | reap_subprocess (child_process *cp) |
6cdfb6e6 | 1180 | { |
c519b5e1 | 1181 | if (cp->procinfo.hProcess) |
6cdfb6e6 | 1182 | { |
c519b5e1 | 1183 | /* Reap the process */ |
b2fc9f3d GV |
1184 | #ifdef FULL_DEBUG |
1185 | /* Process should have already died before we are called. */ | |
1186 | if (WaitForSingleObject (cp->procinfo.hProcess, 0) != WAIT_OBJECT_0) | |
b0728617 | 1187 | DebPrint (("reap_subprocess: child for fd %d has not died yet!", cp->fd)); |
b2fc9f3d | 1188 | #endif |
c519b5e1 GV |
1189 | CloseHandle (cp->procinfo.hProcess); |
1190 | cp->procinfo.hProcess = NULL; | |
1191 | CloseHandle (cp->procinfo.hThread); | |
1192 | cp->procinfo.hThread = NULL; | |
6cdfb6e6 | 1193 | } |
c519b5e1 | 1194 | |
299614f3 EZ |
1195 | /* If cp->fd was not closed yet, we might be still reading the |
1196 | process output, so don't free its resources just yet. The call | |
1197 | to delete_child on behalf of this subprocess will be made by | |
1198 | sys_read when the subprocess output is fully read. */ | |
1199 | if (cp->fd < 0) | |
c519b5e1 | 1200 | delete_child (cp); |
6cdfb6e6 RS |
1201 | } |
1202 | ||
22bae83f EZ |
1203 | /* Wait for a child process specified by PID, or for any of our |
1204 | existing child processes (if PID is nonpositive) to die. When it | |
1205 | does, close its handle. Return the pid of the process that died | |
1206 | and fill in STATUS if non-NULL. */ | |
22759c72 | 1207 | |
22bae83f EZ |
1208 | pid_t |
1209 | waitpid (pid_t pid, int *status, int options) | |
6cdfb6e6 RS |
1210 | { |
1211 | DWORD active, retval; | |
1212 | int nh; | |
1213 | child_process *cp, *cps[MAX_CHILDREN]; | |
1214 | HANDLE wait_hnd[MAX_CHILDREN]; | |
22bae83f EZ |
1215 | DWORD timeout_ms; |
1216 | int dont_wait = (options & WNOHANG) != 0; | |
177c0ea7 | 1217 | |
6cdfb6e6 | 1218 | nh = 0; |
22bae83f EZ |
1219 | /* According to Posix: |
1220 | ||
1221 | PID = -1 means status is requested for any child process. | |
1222 | ||
1223 | PID > 0 means status is requested for a single child process | |
1224 | whose pid is PID. | |
1225 | ||
1226 | PID = 0 means status is requested for any child process whose | |
1227 | process group ID is equal to that of the calling process. But | |
1228 | since Windows has only a limited support for process groups (only | |
1229 | for console processes and only for the purposes of passing | |
1230 | Ctrl-BREAK signal to them), and since we have no documented way | |
1231 | of determining whether a given process belongs to our group, we | |
1232 | treat 0 as -1. | |
1233 | ||
1234 | PID < -1 means status is requested for any child process whose | |
1235 | process group ID is equal to the absolute value of PID. Again, | |
1236 | since we don't support process groups, we treat that as -1. */ | |
1237 | if (pid > 0) | |
6cdfb6e6 | 1238 | { |
22bae83f EZ |
1239 | int our_child = 0; |
1240 | ||
1241 | /* We are requested to wait for a specific child. */ | |
1242 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) | |
1243 | { | |
1244 | /* Some child_procs might be sockets; ignore them. Also | |
1245 | ignore subprocesses whose output is not yet completely | |
1246 | read. */ | |
1247 | if (CHILD_ACTIVE (cp) | |
1248 | && cp->procinfo.hProcess | |
1249 | && cp->pid == pid) | |
1250 | { | |
1251 | our_child = 1; | |
1252 | break; | |
1253 | } | |
1254 | } | |
1255 | if (our_child) | |
1256 | { | |
1257 | if (cp->fd < 0 || (fd_info[cp->fd].flags & FILE_AT_EOF) != 0) | |
1258 | { | |
1259 | wait_hnd[nh] = cp->procinfo.hProcess; | |
1260 | cps[nh] = cp; | |
1261 | nh++; | |
1262 | } | |
1263 | else if (dont_wait) | |
1264 | { | |
1265 | /* PID specifies our subprocess, but its status is not | |
1266 | yet available. */ | |
1267 | return 0; | |
1268 | } | |
1269 | } | |
1270 | if (nh == 0) | |
1271 | { | |
1272 | /* No such child process, or nothing to wait for, so fail. */ | |
1273 | errno = ECHILD; | |
1274 | return -1; | |
1275 | } | |
6cdfb6e6 RS |
1276 | } |
1277 | else | |
1278 | { | |
9d4f32e8 | 1279 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
22bae83f EZ |
1280 | { |
1281 | if (CHILD_ACTIVE (cp) | |
1282 | && cp->procinfo.hProcess | |
1283 | && (cp->fd < 0 || (fd_info[cp->fd].flags & FILE_AT_EOF) != 0)) | |
1284 | { | |
1285 | wait_hnd[nh] = cp->procinfo.hProcess; | |
1286 | cps[nh] = cp; | |
1287 | nh++; | |
1288 | } | |
1289 | } | |
1290 | if (nh == 0) | |
1291 | { | |
1292 | /* Nothing to wait on, so fail. */ | |
1293 | errno = ECHILD; | |
1294 | return -1; | |
1295 | } | |
6cdfb6e6 | 1296 | } |
177c0ea7 | 1297 | |
22bae83f EZ |
1298 | if (dont_wait) |
1299 | timeout_ms = 0; | |
1300 | else | |
1301 | timeout_ms = 1000; /* check for quit about once a second. */ | |
b2fc9f3d GV |
1302 | |
1303 | do | |
1304 | { | |
b2fc9f3d | 1305 | QUIT; |
22bae83f | 1306 | active = WaitForMultipleObjects (nh, wait_hnd, FALSE, timeout_ms); |
e86f5134 | 1307 | } while (active == WAIT_TIMEOUT && !dont_wait); |
b2fc9f3d | 1308 | |
6cdfb6e6 RS |
1309 | if (active == WAIT_FAILED) |
1310 | { | |
1311 | errno = EBADF; | |
1312 | return -1; | |
1313 | } | |
e86f5134 EZ |
1314 | else if (active == WAIT_TIMEOUT && dont_wait) |
1315 | { | |
1316 | /* PID specifies our subprocess, but it didn't exit yet, so its | |
1317 | status is not yet available. */ | |
1318 | #ifdef FULL_DEBUG | |
1319 | DebPrint (("Wait: PID %d not reap yet\n", cp->pid)); | |
1320 | #endif | |
1321 | return 0; | |
1322 | } | |
b2fc9f3d GV |
1323 | else if (active >= WAIT_OBJECT_0 |
1324 | && active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS) | |
6cdfb6e6 RS |
1325 | { |
1326 | active -= WAIT_OBJECT_0; | |
1327 | } | |
b2fc9f3d GV |
1328 | else if (active >= WAIT_ABANDONED_0 |
1329 | && active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS) | |
6cdfb6e6 RS |
1330 | { |
1331 | active -= WAIT_ABANDONED_0; | |
1332 | } | |
b2fc9f3d | 1333 | else |
1088b922 | 1334 | emacs_abort (); |
b2fc9f3d | 1335 | |
6cdfb6e6 RS |
1336 | if (!GetExitCodeProcess (wait_hnd[active], &retval)) |
1337 | { | |
1338 | DebPrint (("Wait.GetExitCodeProcess failed with %lu\n", | |
1339 | GetLastError ())); | |
1340 | retval = 1; | |
1341 | } | |
1342 | if (retval == STILL_ACTIVE) | |
1343 | { | |
22bae83f | 1344 | /* Should never happen. */ |
6cdfb6e6 | 1345 | DebPrint (("Wait.WaitForMultipleObjects returned an active process\n")); |
22bae83f EZ |
1346 | if (pid > 0 && dont_wait) |
1347 | return 0; | |
6cdfb6e6 RS |
1348 | errno = EINVAL; |
1349 | return -1; | |
1350 | } | |
bc69349b RS |
1351 | |
1352 | /* Massage the exit code from the process to match the format expected | |
8e6208c5 | 1353 | by the WIFSTOPPED et al macros in syswait.h. Only WIFSIGNALED and |
bc69349b RS |
1354 | WIFEXITED are supported; WIFSTOPPED doesn't make sense under NT. */ |
1355 | ||
1356 | if (retval == STATUS_CONTROL_C_EXIT) | |
1357 | retval = SIGINT; | |
1358 | else | |
1359 | retval <<= 8; | |
177c0ea7 | 1360 | |
22bae83f EZ |
1361 | if (pid > 0 && active != 0) |
1362 | emacs_abort (); | |
6cdfb6e6 | 1363 | cp = cps[active]; |
c519b5e1 GV |
1364 | pid = cp->pid; |
1365 | #ifdef FULL_DEBUG | |
1366 | DebPrint (("Wait signaled with process pid %d\n", cp->pid)); | |
1367 | #endif | |
22759c72 | 1368 | |
6cdfb6e6 | 1369 | if (status) |
bb5f74ee | 1370 | *status = retval; |
b2fc9f3d | 1371 | reap_subprocess (cp); |
177c0ea7 | 1372 | |
c519b5e1 | 1373 | return pid; |
6cdfb6e6 RS |
1374 | } |
1375 | ||
75be5258 EZ |
1376 | /* Old versions of w32api headers don't have separate 32-bit and |
1377 | 64-bit defines, but the one they have matches the 32-bit variety. */ | |
1378 | #ifndef IMAGE_NT_OPTIONAL_HDR32_MAGIC | |
1379 | # define IMAGE_NT_OPTIONAL_HDR32_MAGIC IMAGE_NT_OPTIONAL_HDR_MAGIC | |
1380 | # define IMAGE_OPTIONAL_HEADER32 IMAGE_OPTIONAL_HEADER | |
1381 | #endif | |
1382 | ||
17788cb3 EZ |
1383 | /* Implementation note: This function works with file names encoded in |
1384 | the current ANSI codepage. */ | |
24f981c9 | 1385 | static void |
b56ceb92 JB |
1386 | w32_executable_type (char * filename, |
1387 | int * is_dos_app, | |
1388 | int * is_cygnus_app, | |
1389 | int * is_gui_app) | |
817abdf6 | 1390 | { |
b2fc9f3d GV |
1391 | file_data executable; |
1392 | char * p; | |
177c0ea7 | 1393 | |
b2fc9f3d GV |
1394 | /* Default values in case we can't tell for sure. */ |
1395 | *is_dos_app = FALSE; | |
1396 | *is_cygnus_app = FALSE; | |
a55a5f3c | 1397 | *is_gui_app = FALSE; |
b2fc9f3d GV |
1398 | |
1399 | if (!open_input_file (&executable, filename)) | |
1400 | return; | |
817abdf6 | 1401 | |
b2fc9f3d | 1402 | p = strrchr (filename, '.'); |
177c0ea7 | 1403 | |
b2fc9f3d | 1404 | /* We can only identify DOS .com programs from the extension. */ |
05131107 | 1405 | if (p && xstrcasecmp (p, ".com") == 0) |
b2fc9f3d | 1406 | *is_dos_app = TRUE; |
05131107 JR |
1407 | else if (p && (xstrcasecmp (p, ".bat") == 0 |
1408 | || xstrcasecmp (p, ".cmd") == 0)) | |
b2fc9f3d GV |
1409 | { |
1410 | /* A DOS shell script - it appears that CreateProcess is happy to | |
1411 | accept this (somewhat surprisingly); presumably it looks at | |
1412 | COMSPEC to determine what executable to actually invoke. | |
1413 | Therefore, we have to do the same here as well. */ | |
1414 | /* Actually, I think it uses the program association for that | |
1415 | extension, which is defined in the registry. */ | |
1416 | p = egetenv ("COMSPEC"); | |
1417 | if (p) | |
a55a5f3c | 1418 | w32_executable_type (p, is_dos_app, is_cygnus_app, is_gui_app); |
b2fc9f3d GV |
1419 | } |
1420 | else | |
817abdf6 | 1421 | { |
b2fc9f3d GV |
1422 | /* Look for DOS .exe signature - if found, we must also check that |
1423 | it isn't really a 16- or 32-bit Windows exe, since both formats | |
1424 | start with a DOS program stub. Note that 16-bit Windows | |
1425 | executables use the OS/2 1.x format. */ | |
817abdf6 | 1426 | |
b2fc9f3d GV |
1427 | IMAGE_DOS_HEADER * dos_header; |
1428 | IMAGE_NT_HEADERS * nt_header; | |
1429 | ||
1430 | dos_header = (PIMAGE_DOS_HEADER) executable.file_base; | |
1431 | if (dos_header->e_magic != IMAGE_DOS_SIGNATURE) | |
1432 | goto unwind; | |
1433 | ||
62aba0d4 | 1434 | nt_header = (PIMAGE_NT_HEADERS) ((unsigned char *) dos_header + dos_header->e_lfanew); |
b2fc9f3d | 1435 | |
177c0ea7 | 1436 | if ((char *) nt_header > (char *) dos_header + executable.size) |
817abdf6 | 1437 | { |
b2fc9f3d GV |
1438 | /* Some dos headers (pkunzip) have bogus e_lfanew fields. */ |
1439 | *is_dos_app = TRUE; | |
177c0ea7 | 1440 | } |
b2fc9f3d GV |
1441 | else if (nt_header->Signature != IMAGE_NT_SIGNATURE |
1442 | && LOWORD (nt_header->Signature) != IMAGE_OS2_SIGNATURE) | |
1443 | { | |
1444 | *is_dos_app = TRUE; | |
1445 | } | |
1446 | else if (nt_header->Signature == IMAGE_NT_SIGNATURE) | |
1447 | { | |
2b6e2f4d JR |
1448 | IMAGE_DATA_DIRECTORY *data_dir = NULL; |
1449 | if (nt_header->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC) | |
1450 | { | |
1451 | /* Ensure we are using the 32 bit structure. */ | |
1452 | IMAGE_OPTIONAL_HEADER32 *opt | |
1453 | = (IMAGE_OPTIONAL_HEADER32*) &(nt_header->OptionalHeader); | |
1454 | data_dir = opt->DataDirectory; | |
1455 | *is_gui_app = (opt->Subsystem == IMAGE_SUBSYSTEM_WINDOWS_GUI); | |
1456 | } | |
1457 | /* MingW 3.12 has the required 64 bit structs, but in case older | |
1458 | versions don't, only check 64 bit exes if we know how. */ | |
1459 | #ifdef IMAGE_NT_OPTIONAL_HDR64_MAGIC | |
1460 | else if (nt_header->OptionalHeader.Magic | |
1461 | == IMAGE_NT_OPTIONAL_HDR64_MAGIC) | |
1462 | { | |
1463 | IMAGE_OPTIONAL_HEADER64 *opt | |
1464 | = (IMAGE_OPTIONAL_HEADER64*) &(nt_header->OptionalHeader); | |
1465 | data_dir = opt->DataDirectory; | |
1466 | *is_gui_app = (opt->Subsystem == IMAGE_SUBSYSTEM_WINDOWS_GUI); | |
1467 | } | |
1468 | #endif | |
1469 | if (data_dir) | |
1470 | { | |
1471 | /* Look for cygwin.dll in DLL import list. */ | |
1472 | IMAGE_DATA_DIRECTORY import_dir = | |
1473 | data_dir[IMAGE_DIRECTORY_ENTRY_IMPORT]; | |
1474 | IMAGE_IMPORT_DESCRIPTOR * imports; | |
1475 | IMAGE_SECTION_HEADER * section; | |
1476 | ||
1477 | section = rva_to_section (import_dir.VirtualAddress, nt_header); | |
1478 | imports = RVA_TO_PTR (import_dir.VirtualAddress, section, | |
1479 | executable); | |
1480 | ||
1481 | for ( ; imports->Name; imports++) | |
1482 | { | |
1483 | char * dllname = RVA_TO_PTR (imports->Name, section, | |
1484 | executable); | |
35f36d65 | 1485 | |
2b6e2f4d JR |
1486 | /* The exact name of the cygwin dll has changed with |
1487 | various releases, but hopefully this will be reasonably | |
1488 | future proof. */ | |
1489 | if (strncmp (dllname, "cygwin", 6) == 0) | |
1490 | { | |
1491 | *is_cygnus_app = TRUE; | |
1492 | break; | |
1493 | } | |
1494 | } | |
1495 | } | |
b2fc9f3d | 1496 | } |
817abdf6 | 1497 | } |
177c0ea7 | 1498 | |
b2fc9f3d GV |
1499 | unwind: |
1500 | close_file_data (&executable); | |
817abdf6 KH |
1501 | } |
1502 | ||
24f981c9 | 1503 | static int |
42c95ffb | 1504 | compare_env (const void *strp1, const void *strp2) |
d9709fde | 1505 | { |
42c95ffb | 1506 | const char *str1 = *(const char **)strp1, *str2 = *(const char **)strp2; |
d9709fde GV |
1507 | |
1508 | while (*str1 && *str2 && *str1 != '=' && *str2 != '=') | |
1509 | { | |
11c22fff AI |
1510 | /* Sort order in command.com/cmd.exe is based on uppercasing |
1511 | names, so do the same here. */ | |
1512 | if (toupper (*str1) > toupper (*str2)) | |
d9709fde | 1513 | return 1; |
11c22fff | 1514 | else if (toupper (*str1) < toupper (*str2)) |
d9709fde GV |
1515 | return -1; |
1516 | str1++, str2++; | |
1517 | } | |
1518 | ||
1519 | if (*str1 == '=' && *str2 == '=') | |
1520 | return 0; | |
1521 | else if (*str1 == '=') | |
1522 | return -1; | |
1523 | else | |
1524 | return 1; | |
1525 | } | |
1526 | ||
24f981c9 | 1527 | static void |
d9709fde GV |
1528 | merge_and_sort_env (char **envp1, char **envp2, char **new_envp) |
1529 | { | |
1530 | char **optr, **nptr; | |
1531 | int num; | |
1532 | ||
1533 | nptr = new_envp; | |
1534 | optr = envp1; | |
1535 | while (*optr) | |
1536 | *nptr++ = *optr++; | |
1537 | num = optr - envp1; | |
1538 | ||
1539 | optr = envp2; | |
1540 | while (*optr) | |
1541 | *nptr++ = *optr++; | |
1542 | num += optr - envp2; | |
1543 | ||
1544 | qsort (new_envp, num, sizeof (char *), compare_env); | |
1545 | ||
1546 | *nptr = NULL; | |
1547 | } | |
6cdfb6e6 RS |
1548 | |
1549 | /* When a new child process is created we need to register it in our list, | |
1550 | so intercept spawn requests. */ | |
177c0ea7 | 1551 | int |
c519b5e1 | 1552 | sys_spawnve (int mode, char *cmdname, char **argv, char **envp) |
6cdfb6e6 | 1553 | { |
0a4de642 | 1554 | Lisp_Object program, full; |
6cdfb6e6 | 1555 | char *cmdline, *env, *parg, **targ; |
d9709fde | 1556 | int arglen, numenv; |
b0728617 | 1557 | pid_t pid; |
c519b5e1 | 1558 | child_process *cp; |
a55a5f3c | 1559 | int is_dos_app, is_cygnus_app, is_gui_app; |
b2fc9f3d | 1560 | int do_quoting = 0; |
d9709fde GV |
1561 | /* We pass our process ID to our children by setting up an environment |
1562 | variable in their environment. */ | |
1563 | char ppid_env_var_buffer[64]; | |
1564 | char *extra_env[] = {ppid_env_var_buffer, NULL}; | |
0a7a6051 JR |
1565 | /* These are the characters that cause an argument to need quoting. |
1566 | Arguments with whitespace characters need quoting to prevent the | |
1567 | argument being split into two or more. Arguments with wildcards | |
1568 | are also quoted, for consistency with posix platforms, where wildcards | |
1569 | are not expanded if we run the program directly without a shell. | |
1570 | Some extra whitespace characters need quoting in Cygwin programs, | |
1571 | so this list is conditionally modified below. */ | |
1572 | char *sepchars = " \t*?"; | |
18a80473 EZ |
1573 | /* This is for native w32 apps; modified below for Cygwin apps. */ |
1574 | char escape_char = '\\'; | |
17788cb3 | 1575 | char cmdname_a[MAX_PATH]; |
d9709fde | 1576 | |
c519b5e1 GV |
1577 | /* We don't care about the other modes */ |
1578 | if (mode != _P_NOWAIT) | |
1579 | { | |
1580 | errno = EINVAL; | |
1581 | return -1; | |
1582 | } | |
0a4de642 | 1583 | |
17788cb3 EZ |
1584 | /* Handle executable names without an executable suffix. The caller |
1585 | already searched exec-path and verified the file is executable, | |
1586 | but start-process doesn't do that for file names that are already | |
1587 | absolute. So we double-check this here, just in case. */ | |
1588 | if (faccessat (AT_FDCWD, cmdname, X_OK, AT_EACCESS) != 0) | |
0a4de642 RS |
1589 | { |
1590 | struct gcpro gcpro1; | |
177c0ea7 | 1591 | |
17788cb3 | 1592 | program = build_string (cmdname); |
0a4de642 RS |
1593 | full = Qnil; |
1594 | GCPRO1 (program); | |
44c7a526 | 1595 | openp (Vexec_path, program, Vexec_suffixes, &full, make_number (X_OK)); |
0a4de642 RS |
1596 | UNGCPRO; |
1597 | if (NILP (full)) | |
1598 | { | |
1599 | errno = EINVAL; | |
1600 | return -1; | |
1601 | } | |
17788cb3 EZ |
1602 | program = ENCODE_FILE (full); |
1603 | cmdname = SDATA (program); | |
0a4de642 RS |
1604 | } |
1605 | ||
b2fc9f3d | 1606 | /* make sure argv[0] and cmdname are both in DOS format */ |
c519b5e1 | 1607 | unixtodos_filename (cmdname); |
17788cb3 EZ |
1608 | /* argv[0] was encoded by caller using ENCODE_FILE, so it is in |
1609 | UTF-8. All the other arguments are encoded by ENCODE_SYSTEM or | |
1610 | some such, and are in some ANSI codepage. We need to have | |
1611 | argv[0] encoded in ANSI codepage. */ | |
1612 | filename_to_ansi (cmdname, cmdname_a); | |
1613 | /* We explicitly require that the command's file name be encodable | |
1614 | in the current ANSI codepage, because we will be invoking it via | |
1615 | the ANSI APIs. */ | |
1616 | if (_mbspbrk (cmdname_a, "?")) | |
1617 | { | |
1618 | errno = ENOENT; | |
1619 | return -1; | |
1620 | } | |
1621 | /* From here on, CMDNAME is an ANSI-encoded string. */ | |
94ae1542 | 1622 | cmdname = cmdname_a; |
c519b5e1 | 1623 | argv[0] = cmdname; |
817abdf6 | 1624 | |
b46a6a83 | 1625 | /* Determine whether program is a 16-bit DOS executable, or a 32-bit Windows |
b2fc9f3d GV |
1626 | executable that is implicitly linked to the Cygnus dll (implying it |
1627 | was compiled with the Cygnus GNU toolchain and hence relies on | |
1628 | cygwin.dll to parse the command line - we use this to decide how to | |
a55a5f3c AI |
1629 | escape quote chars in command line args that must be quoted). |
1630 | ||
1631 | Also determine whether it is a GUI app, so that we don't hide its | |
1632 | initial window unless specifically requested. */ | |
1633 | w32_executable_type (cmdname, &is_dos_app, &is_cygnus_app, &is_gui_app); | |
b2fc9f3d GV |
1634 | |
1635 | /* On Windows 95, if cmdname is a DOS app, we invoke a helper | |
1636 | application to start it by specifying the helper app as cmdname, | |
1637 | while leaving the real app name as argv[0]. */ | |
1638 | if (is_dos_app) | |
817abdf6 | 1639 | { |
17788cb3 EZ |
1640 | char *p; |
1641 | ||
1642 | cmdname = alloca (MAX_PATH); | |
b2fc9f3d GV |
1643 | if (egetenv ("CMDPROXY")) |
1644 | strcpy (cmdname, egetenv ("CMDPROXY")); | |
1645 | else | |
1646 | { | |
d5db4077 | 1647 | strcpy (cmdname, SDATA (Vinvocation_directory)); |
b2fc9f3d GV |
1648 | strcat (cmdname, "cmdproxy.exe"); |
1649 | } | |
17788cb3 EZ |
1650 | |
1651 | /* Can't use unixtodos_filename here, since that needs its file | |
1652 | name argument encoded in UTF-8. */ | |
1653 | for (p = cmdname; *p; p = CharNextA (p)) | |
1654 | if (*p == '/') | |
1655 | *p = '\\'; | |
817abdf6 | 1656 | } |
177c0ea7 | 1657 | |
6cdfb6e6 RS |
1658 | /* we have to do some conjuring here to put argv and envp into the |
1659 | form CreateProcess wants... argv needs to be a space separated/null | |
1660 | terminated list of parameters, and envp is a null | |
1661 | separated/double-null terminated list of parameters. | |
c519b5e1 | 1662 | |
b2fc9f3d GV |
1663 | Additionally, zero-length args and args containing whitespace or |
1664 | quote chars need to be wrapped in double quotes - for this to work, | |
1665 | embedded quotes need to be escaped as well. The aim is to ensure | |
1666 | the child process reconstructs the argv array we start with | |
1667 | exactly, so we treat quotes at the beginning and end of arguments | |
1668 | as embedded quotes. | |
1669 | ||
ef79fbba | 1670 | The w32 GNU-based library from Cygnus doubles quotes to escape |
b2fc9f3d | 1671 | them, while MSVC uses backslash for escaping. (Actually the MSVC |
e1dbe924 | 1672 | startup code does attempt to recognize doubled quotes and accept |
b2fc9f3d GV |
1673 | them, but gets it wrong and ends up requiring three quotes to get a |
1674 | single embedded quote!) So by default we decide whether to use | |
1675 | quote or backslash as the escape character based on whether the | |
1676 | binary is apparently a Cygnus compiled app. | |
1677 | ||
1678 | Note that using backslash to escape embedded quotes requires | |
1679 | additional special handling if an embedded quote is already | |
97610156 | 1680 | preceded by backslash, or if an arg requiring quoting ends with |
b2fc9f3d GV |
1681 | backslash. In such cases, the run of escape characters needs to be |
1682 | doubled. For consistency, we apply this special handling as long | |
1683 | as the escape character is not quote. | |
1684 | ||
1685 | Since we have no idea how large argv and envp are likely to be we | |
1686 | figure out list lengths on the fly and allocate them. */ | |
1687 | ||
1688 | if (!NILP (Vw32_quote_process_args)) | |
1689 | { | |
1690 | do_quoting = 1; | |
1691 | /* Override escape char by binding w32-quote-process-args to | |
1692 | desired character, or use t for auto-selection. */ | |
1693 | if (INTEGERP (Vw32_quote_process_args)) | |
1694 | escape_char = XINT (Vw32_quote_process_args); | |
1695 | else | |
1696 | escape_char = is_cygnus_app ? '"' : '\\'; | |
1697 | } | |
177c0ea7 | 1698 | |
9d4f32e8 | 1699 | /* Cygwin apps needs quoting a bit more often. */ |
dbb70029 GM |
1700 | if (escape_char == '"') |
1701 | sepchars = "\r\n\t\f '"; | |
1702 | ||
6cdfb6e6 RS |
1703 | /* do argv... */ |
1704 | arglen = 0; | |
1705 | targ = argv; | |
1706 | while (*targ) | |
1707 | { | |
c519b5e1 | 1708 | char * p = *targ; |
b2fc9f3d GV |
1709 | int need_quotes = 0; |
1710 | int escape_char_run = 0; | |
c519b5e1 GV |
1711 | |
1712 | if (*p == 0) | |
b2fc9f3d GV |
1713 | need_quotes = 1; |
1714 | for ( ; *p; p++) | |
1715 | { | |
dbb70029 GM |
1716 | if (escape_char == '"' && *p == '\\') |
1717 | /* If it's a Cygwin app, \ needs to be escaped. */ | |
1718 | arglen++; | |
1719 | else if (*p == '"') | |
b2fc9f3d GV |
1720 | { |
1721 | /* allow for embedded quotes to be escaped */ | |
1722 | arglen++; | |
1723 | need_quotes = 1; | |
1724 | /* handle the case where the embedded quote is already escaped */ | |
1725 | if (escape_char_run > 0) | |
1726 | { | |
1727 | /* To preserve the arg exactly, we need to double the | |
1728 | preceding escape characters (plus adding one to | |
1729 | escape the quote character itself). */ | |
1730 | arglen += escape_char_run; | |
1731 | } | |
1732 | } | |
dbb70029 | 1733 | else if (strchr (sepchars, *p) != NULL) |
b2fc9f3d GV |
1734 | { |
1735 | need_quotes = 1; | |
1736 | } | |
1737 | ||
1738 | if (*p == escape_char && escape_char != '"') | |
1739 | escape_char_run++; | |
1740 | else | |
1741 | escape_char_run = 0; | |
1742 | } | |
1743 | if (need_quotes) | |
1744 | { | |
1745 | arglen += 2; | |
1746 | /* handle the case where the arg ends with an escape char - we | |
1747 | must not let the enclosing quote be escaped. */ | |
1748 | if (escape_char_run > 0) | |
1749 | arglen += escape_char_run; | |
1750 | } | |
6cdfb6e6 RS |
1751 | arglen += strlen (*targ++) + 1; |
1752 | } | |
c519b5e1 | 1753 | cmdline = alloca (arglen); |
6cdfb6e6 RS |
1754 | targ = argv; |
1755 | parg = cmdline; | |
1756 | while (*targ) | |
1757 | { | |
c519b5e1 | 1758 | char * p = *targ; |
b2fc9f3d | 1759 | int need_quotes = 0; |
c519b5e1 GV |
1760 | |
1761 | if (*p == 0) | |
b2fc9f3d | 1762 | need_quotes = 1; |
93fdf2f8 | 1763 | |
b2fc9f3d | 1764 | if (do_quoting) |
93fdf2f8 | 1765 | { |
93fdf2f8 | 1766 | for ( ; *p; p++) |
dbb70029 | 1767 | if ((strchr (sepchars, *p) != NULL) || *p == '"') |
b2fc9f3d | 1768 | need_quotes = 1; |
93fdf2f8 | 1769 | } |
b2fc9f3d | 1770 | if (need_quotes) |
c519b5e1 | 1771 | { |
b2fc9f3d | 1772 | int escape_char_run = 0; |
c519b5e1 GV |
1773 | char * first; |
1774 | char * last; | |
1775 | ||
1776 | p = *targ; | |
1777 | first = p; | |
1778 | last = p + strlen (p) - 1; | |
1779 | *parg++ = '"'; | |
b2fc9f3d GV |
1780 | #if 0 |
1781 | /* This version does not escape quotes if they occur at the | |
1782 | beginning or end of the arg - this could lead to incorrect | |
fffa137c | 1783 | behavior when the arg itself represents a command line |
b2fc9f3d GV |
1784 | containing quoted args. I believe this was originally done |
1785 | as a hack to make some things work, before | |
1786 | `w32-quote-process-args' was added. */ | |
c519b5e1 GV |
1787 | while (*p) |
1788 | { | |
1789 | if (*p == '"' && p > first && p < last) | |
b2fc9f3d | 1790 | *parg++ = escape_char; /* escape embedded quotes */ |
c519b5e1 GV |
1791 | *parg++ = *p++; |
1792 | } | |
b2fc9f3d GV |
1793 | #else |
1794 | for ( ; *p; p++) | |
1795 | { | |
1796 | if (*p == '"') | |
1797 | { | |
1798 | /* double preceding escape chars if any */ | |
1799 | while (escape_char_run > 0) | |
1800 | { | |
1801 | *parg++ = escape_char; | |
1802 | escape_char_run--; | |
1803 | } | |
1804 | /* escape all quote chars, even at beginning or end */ | |
1805 | *parg++ = escape_char; | |
1806 | } | |
dbb70029 GM |
1807 | else if (escape_char == '"' && *p == '\\') |
1808 | *parg++ = '\\'; | |
b2fc9f3d GV |
1809 | *parg++ = *p; |
1810 | ||
1811 | if (*p == escape_char && escape_char != '"') | |
1812 | escape_char_run++; | |
1813 | else | |
1814 | escape_char_run = 0; | |
1815 | } | |
1816 | /* double escape chars before enclosing quote */ | |
1817 | while (escape_char_run > 0) | |
1818 | { | |
1819 | *parg++ = escape_char; | |
1820 | escape_char_run--; | |
1821 | } | |
1822 | #endif | |
c519b5e1 GV |
1823 | *parg++ = '"'; |
1824 | } | |
1825 | else | |
1826 | { | |
1827 | strcpy (parg, *targ); | |
1828 | parg += strlen (*targ); | |
1829 | } | |
6cdfb6e6 | 1830 | *parg++ = ' '; |
c519b5e1 | 1831 | targ++; |
6cdfb6e6 RS |
1832 | } |
1833 | *--parg = '\0'; | |
177c0ea7 | 1834 | |
6cdfb6e6 RS |
1835 | /* and envp... */ |
1836 | arglen = 1; | |
1837 | targ = envp; | |
d9709fde | 1838 | numenv = 1; /* for end null */ |
6cdfb6e6 RS |
1839 | while (*targ) |
1840 | { | |
1841 | arglen += strlen (*targ++) + 1; | |
d9709fde | 1842 | numenv++; |
6cdfb6e6 | 1843 | } |
d9709fde | 1844 | /* extra env vars... */ |
2f246cd3 | 1845 | sprintf (ppid_env_var_buffer, "EM_PARENT_PROCESS_ID=%lu", |
6cdfb6e6 RS |
1846 | GetCurrentProcessId ()); |
1847 | arglen += strlen (ppid_env_var_buffer) + 1; | |
d9709fde | 1848 | numenv++; |
6cdfb6e6 | 1849 | |
d9709fde GV |
1850 | /* merge env passed in and extra env into one, and sort it. */ |
1851 | targ = (char **) alloca (numenv * sizeof (char *)); | |
1852 | merge_and_sort_env (envp, extra_env, targ); | |
1853 | ||
1854 | /* concatenate env entries. */ | |
c519b5e1 | 1855 | env = alloca (arglen); |
6cdfb6e6 RS |
1856 | parg = env; |
1857 | while (*targ) | |
1858 | { | |
1859 | strcpy (parg, *targ); | |
1860 | parg += strlen (*targ++); | |
1861 | *parg++ = '\0'; | |
1862 | } | |
6cdfb6e6 RS |
1863 | *parg++ = '\0'; |
1864 | *parg = '\0'; | |
c519b5e1 GV |
1865 | |
1866 | cp = new_child (); | |
1867 | if (cp == NULL) | |
1868 | { | |
1869 | errno = EAGAIN; | |
1870 | return -1; | |
1871 | } | |
177c0ea7 | 1872 | |
6cdfb6e6 | 1873 | /* Now create the process. */ |
a55a5f3c | 1874 | if (!create_child (cmdname, cmdline, env, is_gui_app, &pid, cp)) |
6cdfb6e6 | 1875 | { |
c519b5e1 | 1876 | delete_child (cp); |
6cdfb6e6 | 1877 | errno = ENOEXEC; |
c519b5e1 | 1878 | return -1; |
6cdfb6e6 | 1879 | } |
177c0ea7 | 1880 | |
c519b5e1 | 1881 | return pid; |
6cdfb6e6 RS |
1882 | } |
1883 | ||
1884 | /* Emulate the select call | |
1885 | Wait for available input on any of the given rfds, or timeout if | |
1886 | a timeout is given and no input is detected | |
b2fc9f3d GV |
1887 | wfds and efds are not supported and must be NULL. |
1888 | ||
1889 | For simplicity, we detect the death of child processes here and | |
1890 | synchronously call the SIGCHLD handler. Since it is possible for | |
1891 | children to be created without a corresponding pipe handle from which | |
1892 | to read output, we wait separately on the process handles as well as | |
1893 | the char_avail events for each process pipe. We only call | |
86143765 RS |
1894 | wait/reap_process when the process actually terminates. |
1895 | ||
1896 | To reduce the number of places in which Emacs can be hung such that | |
1897 | C-g is not able to interrupt it, we always wait on interrupt_handle | |
04bf5b65 | 1898 | (which is signaled by the input thread when C-g is detected). If we |
86143765 RS |
1899 | detect that we were woken up by C-g, we return -1 with errno set to |
1900 | EINTR as on Unix. */ | |
6cdfb6e6 | 1901 | |
7684e57b | 1902 | /* From w32console.c */ |
6cdfb6e6 | 1903 | extern HANDLE keyboard_handle; |
86143765 RS |
1904 | |
1905 | /* From w32xfns.c */ | |
1906 | extern HANDLE interrupt_handle; | |
1907 | ||
6cdfb6e6 RS |
1908 | /* From process.c */ |
1909 | extern int proc_buffered_char[]; | |
1910 | ||
177c0ea7 | 1911 | int |
22759c72 | 1912 | sys_select (int nfds, SELECT_TYPE *rfds, SELECT_TYPE *wfds, SELECT_TYPE *efds, |
43aac990 | 1913 | struct timespec *timeout, void *ignored) |
6cdfb6e6 RS |
1914 | { |
1915 | SELECT_TYPE orfds; | |
b2fc9f3d GV |
1916 | DWORD timeout_ms, start_time; |
1917 | int i, nh, nc, nr; | |
6cdfb6e6 | 1918 | DWORD active; |
b2fc9f3d GV |
1919 | child_process *cp, *cps[MAX_CHILDREN]; |
1920 | HANDLE wait_hnd[MAXDESC + MAX_CHILDREN]; | |
c519b5e1 | 1921 | int fdindex[MAXDESC]; /* mapping from wait handles back to descriptors */ |
177c0ea7 | 1922 | |
388cdec0 EZ |
1923 | timeout_ms = |
1924 | timeout ? (timeout->tv_sec * 1000 + timeout->tv_nsec / 1000000) : INFINITE; | |
b2fc9f3d | 1925 | |
6cdfb6e6 | 1926 | /* If the descriptor sets are NULL but timeout isn't, then just Sleep. */ |
177c0ea7 | 1927 | if (rfds == NULL && wfds == NULL && efds == NULL && timeout != NULL) |
6cdfb6e6 | 1928 | { |
b2fc9f3d | 1929 | Sleep (timeout_ms); |
6cdfb6e6 RS |
1930 | return 0; |
1931 | } | |
1932 | ||
1933 | /* Otherwise, we only handle rfds, so fail otherwise. */ | |
1934 | if (rfds == NULL || wfds != NULL || efds != NULL) | |
1935 | { | |
1936 | errno = EINVAL; | |
1937 | return -1; | |
1938 | } | |
177c0ea7 | 1939 | |
6cdfb6e6 RS |
1940 | orfds = *rfds; |
1941 | FD_ZERO (rfds); | |
1942 | nr = 0; | |
86143765 | 1943 | |
9c099ca7 EZ |
1944 | /* If interrupt_handle is available and valid, always wait on it, to |
1945 | detect C-g (quit). */ | |
1946 | nh = 0; | |
1947 | if (interrupt_handle && interrupt_handle != INVALID_HANDLE_VALUE) | |
1948 | { | |
1949 | wait_hnd[0] = interrupt_handle; | |
1950 | fdindex[0] = -1; | |
1951 | nh++; | |
1952 | } | |
177c0ea7 | 1953 | |
b2fc9f3d | 1954 | /* Build a list of pipe handles to wait on. */ |
6cdfb6e6 RS |
1955 | for (i = 0; i < nfds; i++) |
1956 | if (FD_ISSET (i, &orfds)) | |
1957 | { | |
1958 | if (i == 0) | |
1959 | { | |
c519b5e1 GV |
1960 | if (keyboard_handle) |
1961 | { | |
1962 | /* Handle stdin specially */ | |
1963 | wait_hnd[nh] = keyboard_handle; | |
1964 | fdindex[nh] = i; | |
1965 | nh++; | |
1966 | } | |
6cdfb6e6 RS |
1967 | |
1968 | /* Check for any emacs-generated input in the queue since | |
1969 | it won't be detected in the wait */ | |
1970 | if (detect_input_pending ()) | |
1971 | { | |
1972 | FD_SET (i, rfds); | |
c519b5e1 | 1973 | return 1; |
6cdfb6e6 | 1974 | } |
9c099ca7 EZ |
1975 | else if (noninteractive) |
1976 | { | |
1977 | if (handle_file_notifications (NULL)) | |
1978 | return 1; | |
1979 | } | |
6cdfb6e6 RS |
1980 | } |
1981 | else | |
1982 | { | |
d3d14b40 | 1983 | /* Child process and socket/comm port input. */ |
c519b5e1 | 1984 | cp = fd_info[i].cp; |
6cdfb6e6 RS |
1985 | if (cp) |
1986 | { | |
c519b5e1 GV |
1987 | int current_status = cp->status; |
1988 | ||
1989 | if (current_status == STATUS_READ_ACKNOWLEDGED) | |
1990 | { | |
1991 | /* Tell reader thread which file handle to use. */ | |
1992 | cp->fd = i; | |
1993 | /* Wake up the reader thread for this process */ | |
1994 | cp->status = STATUS_READ_READY; | |
1995 | if (!SetEvent (cp->char_consumed)) | |
d3d14b40 | 1996 | DebPrint (("sys_select.SetEvent failed with " |
c519b5e1 GV |
1997 | "%lu for fd %ld\n", GetLastError (), i)); |
1998 | } | |
1999 | ||
2000 | #ifdef CHECK_INTERLOCK | |
2001 | /* slightly crude cross-checking of interlock between threads */ | |
2002 | ||
2003 | current_status = cp->status; | |
2004 | if (WaitForSingleObject (cp->char_avail, 0) == WAIT_OBJECT_0) | |
2005 | { | |
04bf5b65 | 2006 | /* char_avail has been signaled, so status (which may |
c519b5e1 GV |
2007 | have changed) should indicate read has completed |
2008 | but has not been acknowledged. */ | |
2009 | current_status = cp->status; | |
b2fc9f3d GV |
2010 | if (current_status != STATUS_READ_SUCCEEDED |
2011 | && current_status != STATUS_READ_FAILED) | |
c519b5e1 GV |
2012 | DebPrint (("char_avail set, but read not completed: status %d\n", |
2013 | current_status)); | |
2014 | } | |
2015 | else | |
2016 | { | |
04bf5b65 | 2017 | /* char_avail has not been signaled, so status should |
c519b5e1 | 2018 | indicate that read is in progress; small possibility |
04bf5b65 | 2019 | that read has completed but event wasn't yet signaled |
c519b5e1 GV |
2020 | when we tested it (because a context switch occurred |
2021 | or if running on separate CPUs). */ | |
b2fc9f3d GV |
2022 | if (current_status != STATUS_READ_READY |
2023 | && current_status != STATUS_READ_IN_PROGRESS | |
2024 | && current_status != STATUS_READ_SUCCEEDED | |
2025 | && current_status != STATUS_READ_FAILED) | |
c519b5e1 GV |
2026 | DebPrint (("char_avail reset, but read status is bad: %d\n", |
2027 | current_status)); | |
2028 | } | |
2029 | #endif | |
2030 | wait_hnd[nh] = cp->char_avail; | |
2031 | fdindex[nh] = i; | |
1088b922 | 2032 | if (!wait_hnd[nh]) emacs_abort (); |
c519b5e1 | 2033 | nh++; |
6cdfb6e6 RS |
2034 | #ifdef FULL_DEBUG |
2035 | DebPrint (("select waiting on child %d fd %d\n", | |
2036 | cp-child_procs, i)); | |
2037 | #endif | |
6cdfb6e6 RS |
2038 | } |
2039 | else | |
2040 | { | |
c519b5e1 | 2041 | /* Unable to find something to wait on for this fd, skip */ |
ef79fbba GV |
2042 | |
2043 | /* Note that this is not a fatal error, and can in fact | |
2044 | happen in unusual circumstances. Specifically, if | |
2045 | sys_spawnve fails, eg. because the program doesn't | |
2046 | exist, and debug-on-error is t so Fsignal invokes a | |
2047 | nested input loop, then the process output pipe is | |
2048 | still included in input_wait_mask with no child_proc | |
2049 | associated with it. (It is removed when the debugger | |
2050 | exits the nested input loop and the error is thrown.) */ | |
2051 | ||
c519b5e1 | 2052 | DebPrint (("sys_select: fd %ld is invalid! ignoring\n", i)); |
6cdfb6e6 RS |
2053 | } |
2054 | } | |
2055 | } | |
b2fc9f3d GV |
2056 | |
2057 | count_children: | |
2058 | /* Add handles of child processes. */ | |
2059 | nc = 0; | |
9d4f32e8 | 2060 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
ef79fbba GV |
2061 | /* Some child_procs might be sockets; ignore them. Also some |
2062 | children may have died already, but we haven't finished reading | |
2063 | the process output; ignore them too. */ | |
b2af991a | 2064 | if ((CHILD_ACTIVE (cp) && cp->procinfo.hProcess) |
ef79fbba GV |
2065 | && (cp->fd < 0 |
2066 | || (fd_info[cp->fd].flags & FILE_SEND_SIGCHLD) == 0 | |
2067 | || (fd_info[cp->fd].flags & FILE_AT_EOF) != 0) | |
2068 | ) | |
b2fc9f3d GV |
2069 | { |
2070 | wait_hnd[nh + nc] = cp->procinfo.hProcess; | |
2071 | cps[nc] = cp; | |
2072 | nc++; | |
2073 | } | |
177c0ea7 | 2074 | |
6cdfb6e6 | 2075 | /* Nothing to look for, so we didn't find anything */ |
177c0ea7 | 2076 | if (nh + nc == 0) |
6cdfb6e6 | 2077 | { |
22759c72 | 2078 | if (timeout) |
b2fc9f3d | 2079 | Sleep (timeout_ms); |
9c099ca7 EZ |
2080 | if (noninteractive) |
2081 | { | |
2082 | if (handle_file_notifications (NULL)) | |
2083 | return 1; | |
2084 | } | |
6cdfb6e6 RS |
2085 | return 0; |
2086 | } | |
177c0ea7 | 2087 | |
b2fc9f3d | 2088 | start_time = GetTickCount (); |
8b031dcc | 2089 | |
04bf5b65 | 2090 | /* Wait for input or child death to be signaled. If user input is |
8b031dcc AI |
2091 | allowed, then also accept window messages. */ |
2092 | if (FD_ISSET (0, &orfds)) | |
2093 | active = MsgWaitForMultipleObjects (nh + nc, wait_hnd, FALSE, timeout_ms, | |
2094 | QS_ALLINPUT); | |
2095 | else | |
2096 | active = WaitForMultipleObjects (nh + nc, wait_hnd, FALSE, timeout_ms); | |
c519b5e1 | 2097 | |
6cdfb6e6 RS |
2098 | if (active == WAIT_FAILED) |
2099 | { | |
2100 | DebPrint (("select.WaitForMultipleObjects (%d, %lu) failed with %lu\n", | |
b2fc9f3d | 2101 | nh + nc, timeout_ms, GetLastError ())); |
d64b707c | 2102 | /* don't return EBADF - this causes wait_reading_process_output to |
c519b5e1 GV |
2103 | abort; WAIT_FAILED is returned when single-stepping under |
2104 | Windows 95 after switching thread focus in debugger, and | |
2105 | possibly at other times. */ | |
2106 | errno = EINTR; | |
6cdfb6e6 RS |
2107 | return -1; |
2108 | } | |
2109 | else if (active == WAIT_TIMEOUT) | |
2110 | { | |
9c099ca7 EZ |
2111 | if (noninteractive) |
2112 | { | |
2113 | if (handle_file_notifications (NULL)) | |
2114 | return 1; | |
2115 | } | |
6cdfb6e6 RS |
2116 | return 0; |
2117 | } | |
b2fc9f3d GV |
2118 | else if (active >= WAIT_OBJECT_0 |
2119 | && active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS) | |
6cdfb6e6 RS |
2120 | { |
2121 | active -= WAIT_OBJECT_0; | |
2122 | } | |
b2fc9f3d GV |
2123 | else if (active >= WAIT_ABANDONED_0 |
2124 | && active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS) | |
6cdfb6e6 RS |
2125 | { |
2126 | active -= WAIT_ABANDONED_0; | |
2127 | } | |
b2fc9f3d | 2128 | else |
1088b922 | 2129 | emacs_abort (); |
6cdfb6e6 | 2130 | |
c519b5e1 | 2131 | /* Loop over all handles after active (now officially documented as |
04bf5b65 | 2132 | being the first signaled handle in the array). We do this to |
c519b5e1 GV |
2133 | ensure fairness, so that all channels with data available will be |
2134 | processed - otherwise higher numbered channels could be starved. */ | |
2135 | do | |
6cdfb6e6 | 2136 | { |
8b031dcc AI |
2137 | if (active == nh + nc) |
2138 | { | |
2139 | /* There are messages in the lisp thread's queue; we must | |
2140 | drain the queue now to ensure they are processed promptly, | |
2141 | because if we don't do so, we will not be woken again until | |
2142 | further messages arrive. | |
2143 | ||
2144 | NB. If ever we allow window message procedures to callback | |
2145 | into lisp, we will need to ensure messages are dispatched | |
2146 | at a safe time for lisp code to be run (*), and we may also | |
2147 | want to provide some hooks in the dispatch loop to cater | |
2148 | for modeless dialogs created by lisp (ie. to register | |
2149 | window handles to pass to IsDialogMessage). | |
2150 | ||
2151 | (*) Note that MsgWaitForMultipleObjects above is an | |
2152 | internal dispatch point for messages that are sent to | |
2153 | windows created by this thread. */ | |
977c6479 EZ |
2154 | if (drain_message_queue () |
2155 | /* If drain_message_queue returns non-zero, that means | |
2156 | we received a WM_EMACS_FILENOTIFY message. If this | |
2157 | is a TTY frame, we must signal the caller that keyboard | |
2158 | input is available, so that w32_console_read_socket | |
2159 | will be called to pick up the notifications. If we | |
2160 | don't do that, file notifications will only work when | |
2161 | the Emacs TTY frame has focus. */ | |
2162 | && FRAME_TERMCAP_P (SELECTED_FRAME ()) | |
2163 | /* they asked for stdin reads */ | |
2164 | && FD_ISSET (0, &orfds) | |
2165 | /* the stdin handle is valid */ | |
2166 | && keyboard_handle) | |
2167 | { | |
2168 | FD_SET (0, rfds); | |
2169 | if (nr == 0) | |
2170 | nr = 1; | |
2171 | } | |
8b031dcc AI |
2172 | } |
2173 | else if (active >= nh) | |
b2fc9f3d GV |
2174 | { |
2175 | cp = cps[active - nh]; | |
ef79fbba GV |
2176 | |
2177 | /* We cannot always signal SIGCHLD immediately; if we have not | |
2178 | finished reading the process output, we must delay sending | |
2179 | SIGCHLD until we do. */ | |
2180 | ||
2181 | if (cp->fd >= 0 && (fd_info[cp->fd].flags & FILE_AT_EOF) == 0) | |
2182 | fd_info[cp->fd].flags |= FILE_SEND_SIGCHLD; | |
b2fc9f3d | 2183 | /* SIG_DFL for SIGCHLD is ignore */ |
ef79fbba GV |
2184 | else if (sig_handlers[SIGCHLD] != SIG_DFL && |
2185 | sig_handlers[SIGCHLD] != SIG_IGN) | |
b2fc9f3d GV |
2186 | { |
2187 | #ifdef FULL_DEBUG | |
2188 | DebPrint (("select calling SIGCHLD handler for pid %d\n", | |
2189 | cp->pid)); | |
2190 | #endif | |
b2fc9f3d | 2191 | sig_handlers[SIGCHLD] (SIGCHLD); |
b2fc9f3d GV |
2192 | } |
2193 | } | |
86143765 RS |
2194 | else if (fdindex[active] == -1) |
2195 | { | |
2196 | /* Quit (C-g) was detected. */ | |
2197 | errno = EINTR; | |
2198 | return -1; | |
2199 | } | |
b2fc9f3d | 2200 | else if (fdindex[active] == 0) |
c519b5e1 GV |
2201 | { |
2202 | /* Keyboard input available */ | |
2203 | FD_SET (0, rfds); | |
6cdfb6e6 | 2204 | nr++; |
c519b5e1 | 2205 | } |
6cdfb6e6 | 2206 | else |
c519b5e1 | 2207 | { |
b2fc9f3d GV |
2208 | /* must be a socket or pipe - read ahead should have |
2209 | completed, either succeeding or failing. */ | |
c519b5e1 GV |
2210 | FD_SET (fdindex[active], rfds); |
2211 | nr++; | |
c519b5e1 GV |
2212 | } |
2213 | ||
b2fc9f3d GV |
2214 | /* Even though wait_reading_process_output only reads from at most |
2215 | one channel, we must process all channels here so that we reap | |
2216 | all children that have died. */ | |
2217 | while (++active < nh + nc) | |
c519b5e1 GV |
2218 | if (WaitForSingleObject (wait_hnd[active], 0) == WAIT_OBJECT_0) |
2219 | break; | |
b2fc9f3d GV |
2220 | } while (active < nh + nc); |
2221 | ||
9c099ca7 EZ |
2222 | if (noninteractive) |
2223 | { | |
2224 | if (handle_file_notifications (NULL)) | |
2225 | nr++; | |
2226 | } | |
2227 | ||
b2fc9f3d GV |
2228 | /* If no input has arrived and timeout hasn't expired, wait again. */ |
2229 | if (nr == 0) | |
2230 | { | |
2231 | DWORD elapsed = GetTickCount () - start_time; | |
2232 | ||
2233 | if (timeout_ms > elapsed) /* INFINITE is MAX_UINT */ | |
2234 | { | |
2235 | if (timeout_ms != INFINITE) | |
2236 | timeout_ms -= elapsed; | |
2237 | goto count_children; | |
2238 | } | |
2239 | } | |
c519b5e1 | 2240 | |
6cdfb6e6 RS |
2241 | return nr; |
2242 | } | |
2243 | ||
c519b5e1 | 2244 | /* Substitute for certain kill () operations */ |
b2fc9f3d GV |
2245 | |
2246 | static BOOL CALLBACK | |
42c95ffb | 2247 | find_child_console (HWND hwnd, LPARAM arg) |
b2fc9f3d | 2248 | { |
42c95ffb | 2249 | child_process * cp = (child_process *) arg; |
b2fc9f3d GV |
2250 | DWORD thread_id; |
2251 | DWORD process_id; | |
2252 | ||
2253 | thread_id = GetWindowThreadProcessId (hwnd, &process_id); | |
2254 | if (process_id == cp->procinfo.dwProcessId) | |
2255 | { | |
2256 | char window_class[32]; | |
2257 | ||
2258 | GetClassName (hwnd, window_class, sizeof (window_class)); | |
2259 | if (strcmp (window_class, | |
417a7a0e | 2260 | (os_subtype == OS_9X) |
b2fc9f3d GV |
2261 | ? "tty" |
2262 | : "ConsoleWindowClass") == 0) | |
2263 | { | |
2264 | cp->hwnd = hwnd; | |
2265 | return FALSE; | |
2266 | } | |
2267 | } | |
2268 | /* keep looking */ | |
2269 | return TRUE; | |
2270 | } | |
2271 | ||
16b22fef | 2272 | /* Emulate 'kill', but only for other processes. */ |
177c0ea7 | 2273 | int |
b0728617 | 2274 | sys_kill (pid_t pid, int sig) |
6cdfb6e6 RS |
2275 | { |
2276 | child_process *cp; | |
c519b5e1 GV |
2277 | HANDLE proc_hand; |
2278 | int need_to_free = 0; | |
2279 | int rc = 0; | |
177c0ea7 | 2280 | |
d983a10b PE |
2281 | /* Each process is in its own process group. */ |
2282 | if (pid < 0) | |
2283 | pid = -pid; | |
2284 | ||
6cdfb6e6 | 2285 | /* Only handle signals that will result in the process dying */ |
343a2aef EZ |
2286 | if (sig != 0 |
2287 | && sig != SIGINT && sig != SIGKILL && sig != SIGQUIT && sig != SIGHUP) | |
6cdfb6e6 RS |
2288 | { |
2289 | errno = EINVAL; | |
2290 | return -1; | |
2291 | } | |
c519b5e1 | 2292 | |
343a2aef EZ |
2293 | if (sig == 0) |
2294 | { | |
2295 | /* It will take _some_ time before PID 4 or less on Windows will | |
2296 | be Emacs... */ | |
2297 | if (pid <= 4) | |
2298 | { | |
2299 | errno = EPERM; | |
2300 | return -1; | |
2301 | } | |
2302 | proc_hand = OpenProcess (PROCESS_QUERY_INFORMATION, 0, pid); | |
2303 | if (proc_hand == NULL) | |
2304 | { | |
2305 | DWORD err = GetLastError (); | |
2306 | ||
2307 | switch (err) | |
2308 | { | |
2309 | case ERROR_ACCESS_DENIED: /* existing process, but access denied */ | |
2310 | errno = EPERM; | |
2311 | return -1; | |
2312 | case ERROR_INVALID_PARAMETER: /* process PID does not exist */ | |
2313 | errno = ESRCH; | |
2314 | return -1; | |
2315 | } | |
2316 | } | |
2317 | else | |
2318 | CloseHandle (proc_hand); | |
2319 | return 0; | |
2320 | } | |
2321 | ||
6cdfb6e6 RS |
2322 | cp = find_child_pid (pid); |
2323 | if (cp == NULL) | |
2324 | { | |
16b22fef EZ |
2325 | /* We were passed a PID of something other than our subprocess. |
2326 | If that is our own PID, we will send to ourself a message to | |
2327 | close the selected frame, which does not necessarily | |
2328 | terminates Emacs. But then we are not supposed to call | |
2329 | sys_kill with our own PID. */ | |
c519b5e1 GV |
2330 | proc_hand = OpenProcess (PROCESS_TERMINATE, 0, pid); |
2331 | if (proc_hand == NULL) | |
2332 | { | |
2333 | errno = EPERM; | |
2334 | return -1; | |
2335 | } | |
2336 | need_to_free = 1; | |
2337 | } | |
2338 | else | |
2339 | { | |
2340 | proc_hand = cp->procinfo.hProcess; | |
2341 | pid = cp->procinfo.dwProcessId; | |
b2fc9f3d GV |
2342 | |
2343 | /* Try to locate console window for process. */ | |
2344 | EnumWindows (find_child_console, (LPARAM) cp); | |
6cdfb6e6 | 2345 | } |
177c0ea7 | 2346 | |
a55a5f3c | 2347 | if (sig == SIGINT || sig == SIGQUIT) |
6cdfb6e6 | 2348 | { |
b2fc9f3d GV |
2349 | if (NILP (Vw32_start_process_share_console) && cp && cp->hwnd) |
2350 | { | |
2351 | BYTE control_scan_code = (BYTE) MapVirtualKey (VK_CONTROL, 0); | |
a55a5f3c AI |
2352 | /* Fake Ctrl-C for SIGINT, and Ctrl-Break for SIGQUIT. */ |
2353 | BYTE vk_break_code = (sig == SIGINT) ? 'C' : VK_CANCEL; | |
b2fc9f3d GV |
2354 | BYTE break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0); |
2355 | HWND foreground_window; | |
2356 | ||
2357 | if (break_scan_code == 0) | |
2358 | { | |
a55a5f3c | 2359 | /* Fake Ctrl-C for SIGQUIT if we can't manage Ctrl-Break. */ |
b2fc9f3d GV |
2360 | vk_break_code = 'C'; |
2361 | break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0); | |
2362 | } | |
2363 | ||
2364 | foreground_window = GetForegroundWindow (); | |
f446016f | 2365 | if (foreground_window) |
b2fc9f3d | 2366 | { |
f446016f AI |
2367 | /* NT 5.0, and apparently also Windows 98, will not allow |
2368 | a Window to be set to foreground directly without the | |
2369 | user's involvement. The workaround is to attach | |
2370 | ourselves to the thread that owns the foreground | |
2371 | window, since that is the only thread that can set the | |
2372 | foreground window. */ | |
2373 | DWORD foreground_thread, child_thread; | |
2374 | foreground_thread = | |
2375 | GetWindowThreadProcessId (foreground_window, NULL); | |
2376 | if (foreground_thread == GetCurrentThreadId () | |
2377 | || !AttachThreadInput (GetCurrentThreadId (), | |
2378 | foreground_thread, TRUE)) | |
2379 | foreground_thread = 0; | |
2380 | ||
2381 | child_thread = GetWindowThreadProcessId (cp->hwnd, NULL); | |
2382 | if (child_thread == GetCurrentThreadId () | |
2383 | || !AttachThreadInput (GetCurrentThreadId (), | |
2384 | child_thread, TRUE)) | |
2385 | child_thread = 0; | |
2386 | ||
2387 | /* Set the foreground window to the child. */ | |
2388 | if (SetForegroundWindow (cp->hwnd)) | |
2389 | { | |
2390 | /* Generate keystrokes as if user had typed Ctrl-Break or | |
2391 | Ctrl-C. */ | |
2392 | keybd_event (VK_CONTROL, control_scan_code, 0, 0); | |
2393 | keybd_event (vk_break_code, break_scan_code, | |
2394 | (vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY), 0); | |
2395 | keybd_event (vk_break_code, break_scan_code, | |
2396 | (vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY) | |
2397 | | KEYEVENTF_KEYUP, 0); | |
2398 | keybd_event (VK_CONTROL, control_scan_code, | |
2399 | KEYEVENTF_KEYUP, 0); | |
2400 | ||
2401 | /* Sleep for a bit to give time for Emacs frame to respond | |
2402 | to focus change events (if Emacs was active app). */ | |
2403 | Sleep (100); | |
2404 | ||
2405 | SetForegroundWindow (foreground_window); | |
2406 | } | |
2407 | /* Detach from the foreground and child threads now that | |
2408 | the foreground switching is over. */ | |
2409 | if (foreground_thread) | |
2410 | AttachThreadInput (GetCurrentThreadId (), | |
2411 | foreground_thread, FALSE); | |
2412 | if (child_thread) | |
2413 | AttachThreadInput (GetCurrentThreadId (), | |
2414 | child_thread, FALSE); | |
2415 | } | |
2416 | } | |
c519b5e1 | 2417 | /* Ctrl-Break is NT equivalent of SIGINT. */ |
b2fc9f3d | 2418 | else if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid)) |
6cdfb6e6 | 2419 | { |
c519b5e1 | 2420 | DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d " |
6cdfb6e6 RS |
2421 | "for pid %lu\n", GetLastError (), pid)); |
2422 | errno = EINVAL; | |
c519b5e1 | 2423 | rc = -1; |
80874ef7 | 2424 | } |
6cdfb6e6 RS |
2425 | } |
2426 | else | |
2427 | { | |
b2fc9f3d GV |
2428 | if (NILP (Vw32_start_process_share_console) && cp && cp->hwnd) |
2429 | { | |
2430 | #if 1 | |
417a7a0e | 2431 | if (os_subtype == OS_9X) |
b2fc9f3d GV |
2432 | { |
2433 | /* | |
2434 | Another possibility is to try terminating the VDM out-right by | |
2435 | calling the Shell VxD (id 0x17) V86 interface, function #4 | |
2436 | "SHELL_Destroy_VM", ie. | |
2437 | ||
2438 | mov edx,4 | |
2439 | mov ebx,vm_handle | |
2440 | call shellapi | |
2441 | ||
2442 | First need to determine the current VM handle, and then arrange for | |
2443 | the shellapi call to be made from the system vm (by using | |
2444 | Switch_VM_and_callback). | |
2445 | ||
2446 | Could try to invoke DestroyVM through CallVxD. | |
2447 | ||
2448 | */ | |
ef79fbba | 2449 | #if 0 |
b46a6a83 | 2450 | /* On Windows 95, posting WM_QUIT causes the 16-bit subsystem |
ef79fbba GV |
2451 | to hang when cmdproxy is used in conjunction with |
2452 | command.com for an interactive shell. Posting | |
2453 | WM_CLOSE pops up a dialog that, when Yes is selected, | |
2454 | does the same thing. TerminateProcess is also less | |
2455 | than ideal in that subprocesses tend to stick around | |
2456 | until the machine is shutdown, but at least it | |
2457 | doesn't freeze the 16-bit subsystem. */ | |
b2fc9f3d | 2458 | PostMessage (cp->hwnd, WM_QUIT, 0xff, 0); |
ef79fbba GV |
2459 | #endif |
2460 | if (!TerminateProcess (proc_hand, 0xff)) | |
2461 | { | |
2462 | DebPrint (("sys_kill.TerminateProcess returned %d " | |
2463 | "for pid %lu\n", GetLastError (), pid)); | |
2464 | errno = EINVAL; | |
2465 | rc = -1; | |
2466 | } | |
b2fc9f3d GV |
2467 | } |
2468 | else | |
2469 | #endif | |
2470 | PostMessage (cp->hwnd, WM_CLOSE, 0, 0); | |
2471 | } | |
fbd6baed | 2472 | /* Kill the process. On W32 this doesn't kill child processes |
8eae7766 | 2473 | so it doesn't work very well for shells which is why it's not |
b2fc9f3d GV |
2474 | used in every case. */ |
2475 | else if (!TerminateProcess (proc_hand, 0xff)) | |
6cdfb6e6 | 2476 | { |
c519b5e1 | 2477 | DebPrint (("sys_kill.TerminateProcess returned %d " |
6cdfb6e6 RS |
2478 | "for pid %lu\n", GetLastError (), pid)); |
2479 | errno = EINVAL; | |
c519b5e1 | 2480 | rc = -1; |
6cdfb6e6 RS |
2481 | } |
2482 | } | |
c519b5e1 GV |
2483 | |
2484 | if (need_to_free) | |
2485 | CloseHandle (proc_hand); | |
2486 | ||
2487 | return rc; | |
6cdfb6e6 RS |
2488 | } |
2489 | ||
c519b5e1 GV |
2490 | /* The following two routines are used to manipulate stdin, stdout, and |
2491 | stderr of our child processes. | |
2492 | ||
2493 | Assuming that in, out, and err are *not* inheritable, we make them | |
2494 | stdin, stdout, and stderr of the child as follows: | |
2495 | ||
2496 | - Save the parent's current standard handles. | |
2497 | - Set the std handles to inheritable duplicates of the ones being passed in. | |
2498 | (Note that _get_osfhandle() is an io.h procedure that retrieves the | |
2499 | NT file handle for a crt file descriptor.) | |
2500 | - Spawn the child, which inherits in, out, and err as stdin, | |
2501 | stdout, and stderr. (see Spawnve) | |
2502 | - Close the std handles passed to the child. | |
2503 | - Reset the parent's standard handles to the saved handles. | |
2504 | (see reset_standard_handles) | |
2505 | We assume that the caller closes in, out, and err after calling us. */ | |
2506 | ||
2507 | void | |
2508 | prepare_standard_handles (int in, int out, int err, HANDLE handles[3]) | |
6cdfb6e6 | 2509 | { |
c519b5e1 GV |
2510 | HANDLE parent; |
2511 | HANDLE newstdin, newstdout, newstderr; | |
2512 | ||
2513 | parent = GetCurrentProcess (); | |
2514 | ||
2515 | handles[0] = GetStdHandle (STD_INPUT_HANDLE); | |
2516 | handles[1] = GetStdHandle (STD_OUTPUT_HANDLE); | |
2517 | handles[2] = GetStdHandle (STD_ERROR_HANDLE); | |
2518 | ||
2519 | /* make inheritable copies of the new handles */ | |
177c0ea7 | 2520 | if (!DuplicateHandle (parent, |
c519b5e1 GV |
2521 | (HANDLE) _get_osfhandle (in), |
2522 | parent, | |
177c0ea7 JB |
2523 | &newstdin, |
2524 | 0, | |
2525 | TRUE, | |
c519b5e1 GV |
2526 | DUPLICATE_SAME_ACCESS)) |
2527 | report_file_error ("Duplicating input handle for child", Qnil); | |
177c0ea7 | 2528 | |
c519b5e1 GV |
2529 | if (!DuplicateHandle (parent, |
2530 | (HANDLE) _get_osfhandle (out), | |
2531 | parent, | |
2532 | &newstdout, | |
2533 | 0, | |
2534 | TRUE, | |
2535 | DUPLICATE_SAME_ACCESS)) | |
2536 | report_file_error ("Duplicating output handle for child", Qnil); | |
177c0ea7 | 2537 | |
c519b5e1 GV |
2538 | if (!DuplicateHandle (parent, |
2539 | (HANDLE) _get_osfhandle (err), | |
2540 | parent, | |
2541 | &newstderr, | |
2542 | 0, | |
2543 | TRUE, | |
2544 | DUPLICATE_SAME_ACCESS)) | |
2545 | report_file_error ("Duplicating error handle for child", Qnil); | |
2546 | ||
2547 | /* and store them as our std handles */ | |
2548 | if (!SetStdHandle (STD_INPUT_HANDLE, newstdin)) | |
2549 | report_file_error ("Changing stdin handle", Qnil); | |
177c0ea7 | 2550 | |
c519b5e1 GV |
2551 | if (!SetStdHandle (STD_OUTPUT_HANDLE, newstdout)) |
2552 | report_file_error ("Changing stdout handle", Qnil); | |
2553 | ||
2554 | if (!SetStdHandle (STD_ERROR_HANDLE, newstderr)) | |
2555 | report_file_error ("Changing stderr handle", Qnil); | |
2556 | } | |
2557 | ||
2558 | void | |
2559 | reset_standard_handles (int in, int out, int err, HANDLE handles[3]) | |
2560 | { | |
2561 | /* close the duplicated handles passed to the child */ | |
2562 | CloseHandle (GetStdHandle (STD_INPUT_HANDLE)); | |
2563 | CloseHandle (GetStdHandle (STD_OUTPUT_HANDLE)); | |
2564 | CloseHandle (GetStdHandle (STD_ERROR_HANDLE)); | |
2565 | ||
2566 | /* now restore parent's saved std handles */ | |
2567 | SetStdHandle (STD_INPUT_HANDLE, handles[0]); | |
2568 | SetStdHandle (STD_OUTPUT_HANDLE, handles[1]); | |
2569 | SetStdHandle (STD_ERROR_HANDLE, handles[2]); | |
6cdfb6e6 | 2570 | } |
c519b5e1 | 2571 | |
b2fc9f3d GV |
2572 | void |
2573 | set_process_dir (char * dir) | |
2574 | { | |
2575 | process_dir = dir; | |
2576 | } | |
2577 | ||
a11e68d0 RS |
2578 | /* To avoid problems with winsock implementations that work over dial-up |
2579 | connections causing or requiring a connection to exist while Emacs is | |
2580 | running, Emacs no longer automatically loads winsock on startup if it | |
2581 | is present. Instead, it will be loaded when open-network-stream is | |
2582 | first called. | |
2583 | ||
2584 | To allow full control over when winsock is loaded, we provide these | |
2585 | two functions to dynamically load and unload winsock. This allows | |
2586 | dial-up users to only be connected when they actually need to use | |
2587 | socket services. */ | |
2588 | ||
7684e57b | 2589 | /* From w32.c */ |
a11e68d0 RS |
2590 | extern HANDLE winsock_lib; |
2591 | extern BOOL term_winsock (void); | |
2592 | extern BOOL init_winsock (int load_now); | |
2593 | ||
fbd6baed | 2594 | DEFUN ("w32-has-winsock", Fw32_has_winsock, Sw32_has_winsock, 0, 1, 0, |
33f09670 JR |
2595 | doc: /* Test for presence of the Windows socket library `winsock'. |
2596 | Returns non-nil if winsock support is present, nil otherwise. | |
2597 | ||
2598 | If the optional argument LOAD-NOW is non-nil, the winsock library is | |
2599 | also loaded immediately if not already loaded. If winsock is loaded, | |
2600 | the winsock local hostname is returned (since this may be different from | |
2601 | the value of `system-name' and should supplant it), otherwise t is | |
2602 | returned to indicate winsock support is present. */) | |
5842a27b | 2603 | (Lisp_Object load_now) |
a11e68d0 RS |
2604 | { |
2605 | int have_winsock; | |
2606 | ||
2607 | have_winsock = init_winsock (!NILP (load_now)); | |
2608 | if (have_winsock) | |
2609 | { | |
2610 | if (winsock_lib != NULL) | |
2611 | { | |
2612 | /* Return new value for system-name. The best way to do this | |
2613 | is to call init_system_name, saving and restoring the | |
2614 | original value to avoid side-effects. */ | |
2615 | Lisp_Object orig_hostname = Vsystem_name; | |
2616 | Lisp_Object hostname; | |
2617 | ||
2618 | init_system_name (); | |
2619 | hostname = Vsystem_name; | |
2620 | Vsystem_name = orig_hostname; | |
2621 | return hostname; | |
2622 | } | |
2623 | return Qt; | |
2624 | } | |
2625 | return Qnil; | |
2626 | } | |
2627 | ||
fbd6baed | 2628 | DEFUN ("w32-unload-winsock", Fw32_unload_winsock, Sw32_unload_winsock, |
a11e68d0 | 2629 | 0, 0, 0, |
33f09670 JR |
2630 | doc: /* Unload the Windows socket library `winsock' if loaded. |
2631 | This is provided to allow dial-up socket connections to be disconnected | |
2632 | when no longer needed. Returns nil without unloading winsock if any | |
2633 | socket connections still exist. */) | |
5842a27b | 2634 | (void) |
a11e68d0 RS |
2635 | { |
2636 | return term_winsock () ? Qt : Qnil; | |
2637 | } | |
2638 | ||
93fdf2f8 | 2639 | \f |
b2fc9f3d GV |
2640 | /* Some miscellaneous functions that are Windows specific, but not GUI |
2641 | specific (ie. are applicable in terminal or batch mode as well). */ | |
2642 | ||
b2fc9f3d | 2643 | DEFUN ("w32-short-file-name", Fw32_short_file_name, Sw32_short_file_name, 1, 1, 0, |
33f09670 JR |
2644 | doc: /* Return the short file name version (8.3) of the full path of FILENAME. |
2645 | If FILENAME does not exist, return nil. | |
2646 | All path elements in FILENAME are converted to their short names. */) | |
5842a27b | 2647 | (Lisp_Object filename) |
b2fc9f3d GV |
2648 | { |
2649 | char shortname[MAX_PATH]; | |
2650 | ||
b7826503 | 2651 | CHECK_STRING (filename); |
b2fc9f3d GV |
2652 | |
2653 | /* first expand it. */ | |
2654 | filename = Fexpand_file_name (filename, Qnil); | |
2655 | ||
2656 | /* luckily, this returns the short version of each element in the path. */ | |
1fd201bb EZ |
2657 | if (w32_get_short_filename (SDATA (ENCODE_FILE (filename)), |
2658 | shortname, MAX_PATH) == 0) | |
b2fc9f3d GV |
2659 | return Qnil; |
2660 | ||
1fd201bb | 2661 | dostounix_filename (shortname); |
b2fc9f3d | 2662 | |
e7ac588e | 2663 | /* No need to DECODE_FILE, because 8.3 names are pure ASCII. */ |
b2fc9f3d GV |
2664 | return build_string (shortname); |
2665 | } | |
2666 | ||
2667 | ||
2668 | DEFUN ("w32-long-file-name", Fw32_long_file_name, Sw32_long_file_name, | |
2669 | 1, 1, 0, | |
33f09670 JR |
2670 | doc: /* Return the long file name version of the full path of FILENAME. |
2671 | If FILENAME does not exist, return nil. | |
2672 | All path elements in FILENAME are converted to their long names. */) | |
5842a27b | 2673 | (Lisp_Object filename) |
b2fc9f3d | 2674 | { |
1fd201bb | 2675 | char longname[ MAX_UTF8_PATH ]; |
8dcaeba2 | 2676 | int drive_only = 0; |
b2fc9f3d | 2677 | |
b7826503 | 2678 | CHECK_STRING (filename); |
b2fc9f3d | 2679 | |
8dcaeba2 JR |
2680 | if (SBYTES (filename) == 2 |
2681 | && *(SDATA (filename) + 1) == ':') | |
2682 | drive_only = 1; | |
2683 | ||
b2fc9f3d GV |
2684 | /* first expand it. */ |
2685 | filename = Fexpand_file_name (filename, Qnil); | |
2686 | ||
1fd201bb EZ |
2687 | if (!w32_get_long_filename (SDATA (ENCODE_FILE (filename)), longname, |
2688 | MAX_UTF8_PATH)) | |
b2fc9f3d GV |
2689 | return Qnil; |
2690 | ||
1fd201bb | 2691 | dostounix_filename (longname); |
b2fc9f3d | 2692 | |
8dcaeba2 JR |
2693 | /* If we were passed only a drive, make sure that a slash is not appended |
2694 | for consistency with directories. Allow for drive mapping via SUBST | |
2695 | in case expand-file-name is ever changed to expand those. */ | |
2696 | if (drive_only && longname[1] == ':' && longname[2] == '/' && !longname[3]) | |
2697 | longname[2] = '\0'; | |
2698 | ||
1fd201bb | 2699 | return DECODE_FILE (build_unibyte_string (longname)); |
b2fc9f3d GV |
2700 | } |
2701 | ||
33f09670 JR |
2702 | DEFUN ("w32-set-process-priority", Fw32_set_process_priority, |
2703 | Sw32_set_process_priority, 2, 2, 0, | |
2704 | doc: /* Set the priority of PROCESS to PRIORITY. | |
2705 | If PROCESS is nil, the priority of Emacs is changed, otherwise the | |
2706 | priority of the process whose pid is PROCESS is changed. | |
2707 | PRIORITY should be one of the symbols high, normal, or low; | |
2708 | any other symbol will be interpreted as normal. | |
2709 | ||
2710 | If successful, the return value is t, otherwise nil. */) | |
5842a27b | 2711 | (Lisp_Object process, Lisp_Object priority) |
b2fc9f3d GV |
2712 | { |
2713 | HANDLE proc_handle = GetCurrentProcess (); | |
2714 | DWORD priority_class = NORMAL_PRIORITY_CLASS; | |
2715 | Lisp_Object result = Qnil; | |
2716 | ||
b7826503 | 2717 | CHECK_SYMBOL (priority); |
b2fc9f3d GV |
2718 | |
2719 | if (!NILP (process)) | |
2720 | { | |
2721 | DWORD pid; | |
2722 | child_process *cp; | |
2723 | ||
b7826503 | 2724 | CHECK_NUMBER (process); |
b2fc9f3d GV |
2725 | |
2726 | /* Allow pid to be an internally generated one, or one obtained | |
b46a6a83 | 2727 | externally. This is necessary because real pids on Windows 95 are |
b2fc9f3d GV |
2728 | negative. */ |
2729 | ||
2730 | pid = XINT (process); | |
2731 | cp = find_child_pid (pid); | |
2732 | if (cp != NULL) | |
2733 | pid = cp->procinfo.dwProcessId; | |
2734 | ||
2735 | proc_handle = OpenProcess (PROCESS_SET_INFORMATION, FALSE, pid); | |
2736 | } | |
2737 | ||
2738 | if (EQ (priority, Qhigh)) | |
2739 | priority_class = HIGH_PRIORITY_CLASS; | |
2740 | else if (EQ (priority, Qlow)) | |
2741 | priority_class = IDLE_PRIORITY_CLASS; | |
2742 | ||
2743 | if (proc_handle != NULL) | |
2744 | { | |
2745 | if (SetPriorityClass (proc_handle, priority_class)) | |
2746 | result = Qt; | |
2747 | if (!NILP (process)) | |
2748 | CloseHandle (proc_handle); | |
2749 | } | |
2750 | ||
2751 | return result; | |
2752 | } | |
2753 | ||
d613418b EZ |
2754 | #ifdef HAVE_LANGINFO_CODESET |
2755 | /* Emulation of nl_langinfo. Used in fns.c:Flocale_info. */ | |
b56ceb92 JB |
2756 | char * |
2757 | nl_langinfo (nl_item item) | |
d613418b EZ |
2758 | { |
2759 | /* Conversion of Posix item numbers to their Windows equivalents. */ | |
2760 | static const LCTYPE w32item[] = { | |
2761 | LOCALE_IDEFAULTANSICODEPAGE, | |
2762 | LOCALE_SDAYNAME1, LOCALE_SDAYNAME2, LOCALE_SDAYNAME3, | |
2763 | LOCALE_SDAYNAME4, LOCALE_SDAYNAME5, LOCALE_SDAYNAME6, LOCALE_SDAYNAME7, | |
2764 | LOCALE_SMONTHNAME1, LOCALE_SMONTHNAME2, LOCALE_SMONTHNAME3, | |
2765 | LOCALE_SMONTHNAME4, LOCALE_SMONTHNAME5, LOCALE_SMONTHNAME6, | |
2766 | LOCALE_SMONTHNAME7, LOCALE_SMONTHNAME8, LOCALE_SMONTHNAME9, | |
2767 | LOCALE_SMONTHNAME10, LOCALE_SMONTHNAME11, LOCALE_SMONTHNAME12 | |
2768 | }; | |
2769 | ||
2770 | static char *nl_langinfo_buf = NULL; | |
2771 | static int nl_langinfo_len = 0; | |
2772 | ||
2773 | if (nl_langinfo_len <= 0) | |
2774 | nl_langinfo_buf = xmalloc (nl_langinfo_len = 1); | |
2775 | ||
2776 | if (item < 0 || item >= _NL_NUM) | |
2777 | nl_langinfo_buf[0] = 0; | |
2778 | else | |
2779 | { | |
2780 | LCID cloc = GetThreadLocale (); | |
2781 | int need_len = GetLocaleInfo (cloc, w32item[item] | LOCALE_USE_CP_ACP, | |
2782 | NULL, 0); | |
2783 | ||
2784 | if (need_len <= 0) | |
2785 | nl_langinfo_buf[0] = 0; | |
2786 | else | |
2787 | { | |
2788 | if (item == CODESET) | |
2789 | { | |
2790 | need_len += 2; /* for the "cp" prefix */ | |
2791 | if (need_len < 8) /* for the case we call GetACP */ | |
2792 | need_len = 8; | |
2793 | } | |
2794 | if (nl_langinfo_len <= need_len) | |
2795 | nl_langinfo_buf = xrealloc (nl_langinfo_buf, | |
2796 | nl_langinfo_len = need_len); | |
2797 | if (!GetLocaleInfo (cloc, w32item[item] | LOCALE_USE_CP_ACP, | |
2798 | nl_langinfo_buf, nl_langinfo_len)) | |
2799 | nl_langinfo_buf[0] = 0; | |
2800 | else if (item == CODESET) | |
2801 | { | |
2802 | if (strcmp (nl_langinfo_buf, "0") == 0 /* CP_ACP */ | |
2803 | || strcmp (nl_langinfo_buf, "1") == 0) /* CP_OEMCP */ | |
2804 | sprintf (nl_langinfo_buf, "cp%u", GetACP ()); | |
2805 | else | |
2806 | { | |
2807 | memmove (nl_langinfo_buf + 2, nl_langinfo_buf, | |
2808 | strlen (nl_langinfo_buf) + 1); | |
2809 | nl_langinfo_buf[0] = 'c'; | |
2810 | nl_langinfo_buf[1] = 'p'; | |
2811 | } | |
2812 | } | |
2813 | } | |
2814 | } | |
2815 | return nl_langinfo_buf; | |
2816 | } | |
2817 | #endif /* HAVE_LANGINFO_CODESET */ | |
b2fc9f3d | 2818 | |
33f09670 JR |
2819 | DEFUN ("w32-get-locale-info", Fw32_get_locale_info, |
2820 | Sw32_get_locale_info, 1, 2, 0, | |
2821 | doc: /* Return information about the Windows locale LCID. | |
2822 | By default, return a three letter locale code which encodes the default | |
35f36d65 | 2823 | language as the first two characters, and the country or regional variant |
33f09670 JR |
2824 | as the third letter. For example, ENU refers to `English (United States)', |
2825 | while ENC means `English (Canadian)'. | |
2826 | ||
2827 | If the optional argument LONGFORM is t, the long form of the locale | |
2828 | name is returned, e.g. `English (United States)' instead; if LONGFORM | |
2829 | is a number, it is interpreted as an LCTYPE constant and the corresponding | |
2830 | locale information is returned. | |
2831 | ||
2832 | If LCID (a 16-bit number) is not a valid locale, the result is nil. */) | |
5842a27b | 2833 | (Lisp_Object lcid, Lisp_Object longform) |
b2fc9f3d GV |
2834 | { |
2835 | int got_abbrev; | |
2836 | int got_full; | |
2837 | char abbrev_name[32] = { 0 }; | |
2838 | char full_name[256] = { 0 }; | |
2839 | ||
b7826503 | 2840 | CHECK_NUMBER (lcid); |
b2fc9f3d GV |
2841 | |
2842 | if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED)) | |
2843 | return Qnil; | |
2844 | ||
2845 | if (NILP (longform)) | |
2846 | { | |
2847 | got_abbrev = GetLocaleInfo (XINT (lcid), | |
2848 | LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP, | |
2849 | abbrev_name, sizeof (abbrev_name)); | |
2850 | if (got_abbrev) | |
2851 | return build_string (abbrev_name); | |
2852 | } | |
0eaf5926 | 2853 | else if (EQ (longform, Qt)) |
b2fc9f3d GV |
2854 | { |
2855 | got_full = GetLocaleInfo (XINT (lcid), | |
2856 | LOCALE_SLANGUAGE | LOCALE_USE_CP_ACP, | |
2857 | full_name, sizeof (full_name)); | |
2858 | if (got_full) | |
011a0143 | 2859 | return DECODE_SYSTEM (build_string (full_name)); |
b2fc9f3d | 2860 | } |
0eaf5926 GV |
2861 | else if (NUMBERP (longform)) |
2862 | { | |
2863 | got_full = GetLocaleInfo (XINT (lcid), | |
2864 | XINT (longform), | |
2865 | full_name, sizeof (full_name)); | |
96512555 EZ |
2866 | /* GetLocaleInfo's return value includes the terminating null |
2867 | character, when the returned information is a string, whereas | |
2868 | make_unibyte_string needs the string length without the | |
2869 | terminating null. */ | |
0eaf5926 | 2870 | if (got_full) |
96512555 | 2871 | return make_unibyte_string (full_name, got_full - 1); |
0eaf5926 | 2872 | } |
b2fc9f3d GV |
2873 | |
2874 | return Qnil; | |
2875 | } | |
2876 | ||
2877 | ||
33f09670 JR |
2878 | DEFUN ("w32-get-current-locale-id", Fw32_get_current_locale_id, |
2879 | Sw32_get_current_locale_id, 0, 0, 0, | |
2880 | doc: /* Return Windows locale id for current locale setting. | |
2881 | This is a numerical value; use `w32-get-locale-info' to convert to a | |
2882 | human-readable form. */) | |
5842a27b | 2883 | (void) |
b2fc9f3d GV |
2884 | { |
2885 | return make_number (GetThreadLocale ()); | |
2886 | } | |
2887 | ||
24f981c9 | 2888 | static DWORD |
b56ceb92 | 2889 | int_from_hex (char * s) |
ef79fbba GV |
2890 | { |
2891 | DWORD val = 0; | |
2892 | static char hex[] = "0123456789abcdefABCDEF"; | |
2893 | char * p; | |
2894 | ||
ed3751c8 | 2895 | while (*s && (p = strchr (hex, *s)) != NULL) |
ef79fbba GV |
2896 | { |
2897 | unsigned digit = p - hex; | |
2898 | if (digit > 15) | |
2899 | digit -= 6; | |
2900 | val = val * 16 + digit; | |
2901 | s++; | |
2902 | } | |
2903 | return val; | |
2904 | } | |
2905 | ||
2906 | /* We need to build a global list, since the EnumSystemLocale callback | |
2907 | function isn't given a context pointer. */ | |
2908 | Lisp_Object Vw32_valid_locale_ids; | |
2909 | ||
24f981c9 | 2910 | static BOOL CALLBACK |
b56ceb92 | 2911 | enum_locale_fn (LPTSTR localeNum) |
ef79fbba GV |
2912 | { |
2913 | DWORD id = int_from_hex (localeNum); | |
2914 | Vw32_valid_locale_ids = Fcons (make_number (id), Vw32_valid_locale_ids); | |
2915 | return TRUE; | |
2916 | } | |
2917 | ||
33f09670 JR |
2918 | DEFUN ("w32-get-valid-locale-ids", Fw32_get_valid_locale_ids, |
2919 | Sw32_get_valid_locale_ids, 0, 0, 0, | |
2920 | doc: /* Return list of all valid Windows locale ids. | |
2921 | Each id is a numerical value; use `w32-get-locale-info' to convert to a | |
2922 | human-readable form. */) | |
5842a27b | 2923 | (void) |
ef79fbba GV |
2924 | { |
2925 | Vw32_valid_locale_ids = Qnil; | |
2926 | ||
2927 | EnumSystemLocales (enum_locale_fn, LCID_SUPPORTED); | |
2928 | ||
2929 | Vw32_valid_locale_ids = Fnreverse (Vw32_valid_locale_ids); | |
2930 | return Vw32_valid_locale_ids; | |
2931 | } | |
2932 | ||
b2fc9f3d GV |
2933 | |
2934 | DEFUN ("w32-get-default-locale-id", Fw32_get_default_locale_id, Sw32_get_default_locale_id, 0, 1, 0, | |
33f09670 JR |
2935 | doc: /* Return Windows locale id for default locale setting. |
2936 | By default, the system default locale setting is returned; if the optional | |
2937 | parameter USERP is non-nil, the user default locale setting is returned. | |
2938 | This is a numerical value; use `w32-get-locale-info' to convert to a | |
2939 | human-readable form. */) | |
5842a27b | 2940 | (Lisp_Object userp) |
b2fc9f3d GV |
2941 | { |
2942 | if (NILP (userp)) | |
2943 | return make_number (GetSystemDefaultLCID ()); | |
2944 | return make_number (GetUserDefaultLCID ()); | |
2945 | } | |
2946 | ||
177c0ea7 | 2947 | |
b2fc9f3d | 2948 | DEFUN ("w32-set-current-locale", Fw32_set_current_locale, Sw32_set_current_locale, 1, 1, 0, |
33f09670 JR |
2949 | doc: /* Make Windows locale LCID be the current locale setting for Emacs. |
2950 | If successful, the new locale id is returned, otherwise nil. */) | |
5842a27b | 2951 | (Lisp_Object lcid) |
b2fc9f3d | 2952 | { |
b7826503 | 2953 | CHECK_NUMBER (lcid); |
b2fc9f3d GV |
2954 | |
2955 | if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED)) | |
2956 | return Qnil; | |
2957 | ||
2958 | if (!SetThreadLocale (XINT (lcid))) | |
2959 | return Qnil; | |
2960 | ||
ef79fbba GV |
2961 | /* Need to set input thread locale if present. */ |
2962 | if (dwWindowsThreadId) | |
2963 | /* Reply is not needed. */ | |
2964 | PostThreadMessage (dwWindowsThreadId, WM_EMACS_SETLOCALE, XINT (lcid), 0); | |
2965 | ||
b2fc9f3d GV |
2966 | return make_number (GetThreadLocale ()); |
2967 | } | |
2968 | ||
0eaf5926 GV |
2969 | |
2970 | /* We need to build a global list, since the EnumCodePages callback | |
2971 | function isn't given a context pointer. */ | |
2972 | Lisp_Object Vw32_valid_codepages; | |
2973 | ||
24f981c9 | 2974 | static BOOL CALLBACK |
b56ceb92 | 2975 | enum_codepage_fn (LPTSTR codepageNum) |
0eaf5926 GV |
2976 | { |
2977 | DWORD id = atoi (codepageNum); | |
2978 | Vw32_valid_codepages = Fcons (make_number (id), Vw32_valid_codepages); | |
2979 | return TRUE; | |
2980 | } | |
2981 | ||
33f09670 JR |
2982 | DEFUN ("w32-get-valid-codepages", Fw32_get_valid_codepages, |
2983 | Sw32_get_valid_codepages, 0, 0, 0, | |
2984 | doc: /* Return list of all valid Windows codepages. */) | |
5842a27b | 2985 | (void) |
0eaf5926 GV |
2986 | { |
2987 | Vw32_valid_codepages = Qnil; | |
2988 | ||
2989 | EnumSystemCodePages (enum_codepage_fn, CP_SUPPORTED); | |
2990 | ||
2991 | Vw32_valid_codepages = Fnreverse (Vw32_valid_codepages); | |
2992 | return Vw32_valid_codepages; | |
2993 | } | |
2994 | ||
2995 | ||
33f09670 JR |
2996 | DEFUN ("w32-get-console-codepage", Fw32_get_console_codepage, |
2997 | Sw32_get_console_codepage, 0, 0, 0, | |
2998 | doc: /* Return current Windows codepage for console input. */) | |
5842a27b | 2999 | (void) |
0eaf5926 GV |
3000 | { |
3001 | return make_number (GetConsoleCP ()); | |
3002 | } | |
3003 | ||
177c0ea7 | 3004 | |
33f09670 JR |
3005 | DEFUN ("w32-set-console-codepage", Fw32_set_console_codepage, |
3006 | Sw32_set_console_codepage, 1, 1, 0, | |
62356a1b EZ |
3007 | doc: /* Make Windows codepage CP be the codepage for Emacs tty keyboard input. |
3008 | This codepage setting affects keyboard input in tty mode. | |
33f09670 | 3009 | If successful, the new CP is returned, otherwise nil. */) |
5842a27b | 3010 | (Lisp_Object cp) |
0eaf5926 | 3011 | { |
b7826503 | 3012 | CHECK_NUMBER (cp); |
0eaf5926 GV |
3013 | |
3014 | if (!IsValidCodePage (XINT (cp))) | |
3015 | return Qnil; | |
3016 | ||
3017 | if (!SetConsoleCP (XINT (cp))) | |
3018 | return Qnil; | |
3019 | ||
3020 | return make_number (GetConsoleCP ()); | |
3021 | } | |
3022 | ||
3023 | ||
33f09670 JR |
3024 | DEFUN ("w32-get-console-output-codepage", Fw32_get_console_output_codepage, |
3025 | Sw32_get_console_output_codepage, 0, 0, 0, | |
3026 | doc: /* Return current Windows codepage for console output. */) | |
5842a27b | 3027 | (void) |
0eaf5926 GV |
3028 | { |
3029 | return make_number (GetConsoleOutputCP ()); | |
3030 | } | |
3031 | ||
177c0ea7 | 3032 | |
33f09670 JR |
3033 | DEFUN ("w32-set-console-output-codepage", Fw32_set_console_output_codepage, |
3034 | Sw32_set_console_output_codepage, 1, 1, 0, | |
62356a1b EZ |
3035 | doc: /* Make Windows codepage CP be the codepage for Emacs console output. |
3036 | This codepage setting affects display in tty mode. | |
33f09670 | 3037 | If successful, the new CP is returned, otherwise nil. */) |
5842a27b | 3038 | (Lisp_Object cp) |
0eaf5926 | 3039 | { |
b7826503 | 3040 | CHECK_NUMBER (cp); |
0eaf5926 GV |
3041 | |
3042 | if (!IsValidCodePage (XINT (cp))) | |
3043 | return Qnil; | |
3044 | ||
3045 | if (!SetConsoleOutputCP (XINT (cp))) | |
3046 | return Qnil; | |
3047 | ||
3048 | return make_number (GetConsoleOutputCP ()); | |
3049 | } | |
3050 | ||
3051 | ||
33f09670 JR |
3052 | DEFUN ("w32-get-codepage-charset", Fw32_get_codepage_charset, |
3053 | Sw32_get_codepage_charset, 1, 1, 0, | |
62356a1b | 3054 | doc: /* Return charset ID corresponding to codepage CP. |
33f09670 | 3055 | Returns nil if the codepage is not valid. */) |
5842a27b | 3056 | (Lisp_Object cp) |
0eaf5926 GV |
3057 | { |
3058 | CHARSETINFO info; | |
3059 | ||
b7826503 | 3060 | CHECK_NUMBER (cp); |
0eaf5926 GV |
3061 | |
3062 | if (!IsValidCodePage (XINT (cp))) | |
3063 | return Qnil; | |
3064 | ||
3065 | if (TranslateCharsetInfo ((DWORD *) XINT (cp), &info, TCI_SRCCODEPAGE)) | |
3066 | return make_number (info.ciCharset); | |
3067 | ||
3068 | return Qnil; | |
3069 | } | |
3070 | ||
3071 | ||
33f09670 JR |
3072 | DEFUN ("w32-get-valid-keyboard-layouts", Fw32_get_valid_keyboard_layouts, |
3073 | Sw32_get_valid_keyboard_layouts, 0, 0, 0, | |
3074 | doc: /* Return list of Windows keyboard languages and layouts. | |
3075 | The return value is a list of pairs of language id and layout id. */) | |
5842a27b | 3076 | (void) |
0eaf5926 GV |
3077 | { |
3078 | int num_layouts = GetKeyboardLayoutList (0, NULL); | |
3079 | HKL * layouts = (HKL *) alloca (num_layouts * sizeof (HKL)); | |
3080 | Lisp_Object obj = Qnil; | |
3081 | ||
3082 | if (GetKeyboardLayoutList (num_layouts, layouts) == num_layouts) | |
3083 | { | |
3084 | while (--num_layouts >= 0) | |
3085 | { | |
3086 | DWORD kl = (DWORD) layouts[num_layouts]; | |
3087 | ||
3088 | obj = Fcons (Fcons (make_number (kl & 0xffff), | |
3089 | make_number ((kl >> 16) & 0xffff)), | |
3090 | obj); | |
3091 | } | |
3092 | } | |
3093 | ||
3094 | return obj; | |
3095 | } | |
3096 | ||
3097 | ||
33f09670 JR |
3098 | DEFUN ("w32-get-keyboard-layout", Fw32_get_keyboard_layout, |
3099 | Sw32_get_keyboard_layout, 0, 0, 0, | |
3100 | doc: /* Return current Windows keyboard language and layout. | |
3101 | The return value is the cons of the language id and the layout id. */) | |
5842a27b | 3102 | (void) |
0eaf5926 GV |
3103 | { |
3104 | DWORD kl = (DWORD) GetKeyboardLayout (dwWindowsThreadId); | |
3105 | ||
3106 | return Fcons (make_number (kl & 0xffff), | |
3107 | make_number ((kl >> 16) & 0xffff)); | |
3108 | } | |
3109 | ||
177c0ea7 | 3110 | |
33f09670 JR |
3111 | DEFUN ("w32-set-keyboard-layout", Fw32_set_keyboard_layout, |
3112 | Sw32_set_keyboard_layout, 1, 1, 0, | |
3113 | doc: /* Make LAYOUT be the current keyboard layout for Emacs. | |
3114 | The keyboard layout setting affects interpretation of keyboard input. | |
3115 | If successful, the new layout id is returned, otherwise nil. */) | |
5842a27b | 3116 | (Lisp_Object layout) |
0eaf5926 GV |
3117 | { |
3118 | DWORD kl; | |
3119 | ||
b7826503 | 3120 | CHECK_CONS (layout); |
f4532092 AI |
3121 | CHECK_NUMBER_CAR (layout); |
3122 | CHECK_NUMBER_CDR (layout); | |
0eaf5926 | 3123 | |
8e713be6 KR |
3124 | kl = (XINT (XCAR (layout)) & 0xffff) |
3125 | | (XINT (XCDR (layout)) << 16); | |
0eaf5926 GV |
3126 | |
3127 | /* Synchronize layout with input thread. */ | |
3128 | if (dwWindowsThreadId) | |
3129 | { | |
3130 | if (PostThreadMessage (dwWindowsThreadId, WM_EMACS_SETKEYBOARDLAYOUT, | |
3131 | (WPARAM) kl, 0)) | |
3132 | { | |
3133 | MSG msg; | |
3134 | GetMessage (&msg, NULL, WM_EMACS_DONE, WM_EMACS_DONE); | |
3135 | ||
3136 | if (msg.wParam == 0) | |
3137 | return Qnil; | |
3138 | } | |
3139 | } | |
3140 | else if (!ActivateKeyboardLayout ((HKL) kl, 0)) | |
3141 | return Qnil; | |
3142 | ||
3143 | return Fw32_get_keyboard_layout (); | |
3144 | } | |
3145 | ||
b2fc9f3d | 3146 | \f |
b56ceb92 JB |
3147 | void |
3148 | syms_of_ntproc (void) | |
93fdf2f8 | 3149 | { |
51128692 JR |
3150 | DEFSYM (Qhigh, "high"); |
3151 | DEFSYM (Qlow, "low"); | |
b2fc9f3d | 3152 | |
fbd6baed GV |
3153 | defsubr (&Sw32_has_winsock); |
3154 | defsubr (&Sw32_unload_winsock); | |
7d701334 | 3155 | |
b2fc9f3d GV |
3156 | defsubr (&Sw32_short_file_name); |
3157 | defsubr (&Sw32_long_file_name); | |
3158 | defsubr (&Sw32_set_process_priority); | |
3159 | defsubr (&Sw32_get_locale_info); | |
3160 | defsubr (&Sw32_get_current_locale_id); | |
3161 | defsubr (&Sw32_get_default_locale_id); | |
ef79fbba | 3162 | defsubr (&Sw32_get_valid_locale_ids); |
b2fc9f3d | 3163 | defsubr (&Sw32_set_current_locale); |
a11e68d0 | 3164 | |
0eaf5926 GV |
3165 | defsubr (&Sw32_get_console_codepage); |
3166 | defsubr (&Sw32_set_console_codepage); | |
3167 | defsubr (&Sw32_get_console_output_codepage); | |
3168 | defsubr (&Sw32_set_console_output_codepage); | |
3169 | defsubr (&Sw32_get_valid_codepages); | |
3170 | defsubr (&Sw32_get_codepage_charset); | |
3171 | ||
3172 | defsubr (&Sw32_get_valid_keyboard_layouts); | |
3173 | defsubr (&Sw32_get_keyboard_layout); | |
3174 | defsubr (&Sw32_set_keyboard_layout); | |
3175 | ||
29208e82 | 3176 | DEFVAR_LISP ("w32-quote-process-args", Vw32_quote_process_args, |
33f09670 JR |
3177 | doc: /* Non-nil enables quoting of process arguments to ensure correct parsing. |
3178 | Because Windows does not directly pass argv arrays to child processes, | |
3179 | programs have to reconstruct the argv array by parsing the command | |
3180 | line string. For an argument to contain a space, it must be enclosed | |
3181 | in double quotes or it will be parsed as multiple arguments. | |
3182 | ||
3183 | If the value is a character, that character will be used to escape any | |
3184 | quote characters that appear, otherwise a suitable escape character | |
3185 | will be chosen based on the type of the program. */); | |
b2fc9f3d | 3186 | Vw32_quote_process_args = Qt; |
817abdf6 | 3187 | |
fbd6baed | 3188 | DEFVAR_LISP ("w32-start-process-show-window", |
29208e82 | 3189 | Vw32_start_process_show_window, |
33f09670 JR |
3190 | doc: /* When nil, new child processes hide their windows. |
3191 | When non-nil, they show their window in the method of their choice. | |
3192 | This variable doesn't affect GUI applications, which will never be hidden. */); | |
fbd6baed | 3193 | Vw32_start_process_show_window = Qnil; |
0ecf7d36 | 3194 | |
b2fc9f3d | 3195 | DEFVAR_LISP ("w32-start-process-share-console", |
29208e82 | 3196 | Vw32_start_process_share_console, |
33f09670 JR |
3197 | doc: /* When nil, new child processes are given a new console. |
3198 | When non-nil, they share the Emacs console; this has the limitation of | |
804d894a | 3199 | allowing only one DOS subprocess to run at a time (whether started directly |
33f09670 JR |
3200 | or indirectly by Emacs), and preventing Emacs from cleanly terminating the |
3201 | subprocess group, but may allow Emacs to interrupt a subprocess that doesn't | |
3202 | otherwise respond to interrupts from Emacs. */); | |
b2fc9f3d GV |
3203 | Vw32_start_process_share_console = Qnil; |
3204 | ||
82e7c0a9 | 3205 | DEFVAR_LISP ("w32-start-process-inherit-error-mode", |
29208e82 | 3206 | Vw32_start_process_inherit_error_mode, |
33f09670 JR |
3207 | doc: /* When nil, new child processes revert to the default error mode. |
3208 | When non-nil, they inherit their error mode setting from Emacs, which stops | |
3209 | them blocking when trying to access unmounted drives etc. */); | |
82e7c0a9 AI |
3210 | Vw32_start_process_inherit_error_mode = Qt; |
3211 | ||
29208e82 | 3212 | DEFVAR_INT ("w32-pipe-read-delay", w32_pipe_read_delay, |
33f09670 JR |
3213 | doc: /* Forced delay before reading subprocess output. |
3214 | This is done to improve the buffering of subprocess output, by | |
3215 | avoiding the inefficiency of frequently reading small amounts of data. | |
3216 | ||
3217 | If positive, the value is the number of milliseconds to sleep before | |
3218 | reading the subprocess output. If negative, the magnitude is the number | |
3219 | of time slices to wait (effectively boosting the priority of the child | |
3220 | process temporarily). A value of zero disables waiting entirely. */); | |
5322f50b | 3221 | w32_pipe_read_delay = 50; |
0c04091e | 3222 | |
29208e82 | 3223 | DEFVAR_LISP ("w32-downcase-file-names", Vw32_downcase_file_names, |
33f09670 JR |
3224 | doc: /* Non-nil means convert all-upper case file names to lower case. |
3225 | This applies when performing completions and file name expansion. | |
3226 | Note that the value of this setting also affects remote file names, | |
3227 | so you probably don't want to set to non-nil if you use case-sensitive | |
177c0ea7 | 3228 | filesystems via ange-ftp. */); |
fbd6baed | 3229 | Vw32_downcase_file_names = Qnil; |
b2fc9f3d GV |
3230 | |
3231 | #if 0 | |
29208e82 | 3232 | DEFVAR_LISP ("w32-generate-fake-inodes", Vw32_generate_fake_inodes, |
33f09670 JR |
3233 | doc: /* Non-nil means attempt to fake realistic inode values. |
3234 | This works by hashing the truename of files, and should detect | |
3235 | aliasing between long and short (8.3 DOS) names, but can have | |
4c36be58 | 3236 | false positives because of hash collisions. Note that determining |
33f09670 | 3237 | the truename of a file can be slow. */); |
b2fc9f3d GV |
3238 | Vw32_generate_fake_inodes = Qnil; |
3239 | #endif | |
3240 | ||
29208e82 | 3241 | DEFVAR_LISP ("w32-get-true-file-attributes", Vw32_get_true_file_attributes, |
ed4c17bb EZ |
3242 | doc: /* Non-nil means determine accurate file attributes in `file-attributes'. |
3243 | This option controls whether to issue additional system calls to determine | |
017dab84 | 3244 | accurate link counts, file type, and ownership information. It is more |
ed4c17bb | 3245 | useful for files on NTFS volumes, where hard links and file security are |
017dab84 | 3246 | supported, than on volumes of the FAT family. |
ed4c17bb EZ |
3247 | |
3248 | Without these system calls, link count will always be reported as 1 and file | |
3249 | ownership will be attributed to the current user. | |
3250 | The default value `local' means only issue these system calls for files | |
3251 | on local fixed drives. A value of nil means never issue them. | |
3252 | Any other non-nil value means do this even on remote and removable drives | |
3253 | where the performance impact may be noticeable even on modern hardware. */); | |
2fa4f090 | 3254 | Vw32_get_true_file_attributes = Qlocal; |
af621bc3 EZ |
3255 | |
3256 | staticpro (&Vw32_valid_locale_ids); | |
3257 | staticpro (&Vw32_valid_codepages); | |
93fdf2f8 | 3258 | } |
42a7e7f1 | 3259 | /* end of w32proc.c */ |