Commit | Line | Data |
---|---|---|
b46a6a83 | 1 | /* Process support for GNU Emacs on the Microsoft Windows API. |
1f41ee56 | 2 | |
ba318903 | 3 | Copyright (C) 1992, 1995, 1999-2014 Free Software Foundation, Inc. |
6cdfb6e6 | 4 | |
3b7ad313 EN |
5 | This file is part of GNU Emacs. |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
3b7ad313 | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
3b7ad313 EN |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
6cdfb6e6 | 19 | |
9ec0b715 | 20 | /* |
6cdfb6e6 RS |
21 | Drew Bliss Oct 14, 1993 |
22 | Adapted from alarm.c by Tim Fleehart | |
23 | */ | |
24 | ||
279066b2 | 25 | #include <mingw_time.h> |
6cdfb6e6 RS |
26 | #include <stdio.h> |
27 | #include <stdlib.h> | |
28 | #include <errno.h> | |
a68089e4 | 29 | #include <ctype.h> |
6cdfb6e6 | 30 | #include <io.h> |
c519b5e1 | 31 | #include <fcntl.h> |
6cdfb6e6 | 32 | #include <signal.h> |
51f635c4 | 33 | #include <sys/file.h> |
17788cb3 | 34 | #include <mbstring.h> |
6cdfb6e6 | 35 | |
c519b5e1 | 36 | /* must include CRT headers *before* config.h */ |
4838e624 | 37 | #include <config.h> |
4838e624 | 38 | |
c519b5e1 GV |
39 | #undef signal |
40 | #undef wait | |
41 | #undef spawnve | |
42 | #undef select | |
43 | #undef kill | |
44 | ||
6cdfb6e6 | 45 | #include <windows.h> |
bd717ca4 FP |
46 | #if defined(__GNUC__) && !defined(__MINGW64__) |
47 | /* This definition is missing from mingw.org headers, but not MinGW64 | |
48 | headers. */ | |
ed3751c8 | 49 | extern BOOL WINAPI IsValidLocale (LCID, DWORD); |
42c95ffb | 50 | #endif |
6cdfb6e6 | 51 | |
d613418b EZ |
52 | #ifdef HAVE_LANGINFO_CODESET |
53 | #include <nl_types.h> | |
54 | #include <langinfo.h> | |
55 | #endif | |
56 | ||
6cdfb6e6 | 57 | #include "lisp.h" |
489f9371 | 58 | #include "w32.h" |
501199a3 | 59 | #include "w32common.h" |
b2fc9f3d | 60 | #include "w32heap.h" |
6cdfb6e6 | 61 | #include "systime.h" |
3d7eead0 GV |
62 | #include "syswait.h" |
63 | #include "process.h" | |
e7c15bba | 64 | #include "syssignal.h" |
ef79fbba | 65 | #include "w32term.h" |
f481eb31 | 66 | #include "dispextern.h" /* for xstrcasecmp */ |
b23077df | 67 | #include "coding.h" |
3d7eead0 | 68 | |
8747ac3f EZ |
69 | #define RVA_TO_PTR(var,section,filedata) \ |
70 | ((void *)((section)->PointerToRawData \ | |
62aba0d4 | 71 | + ((DWORD_PTR)(var) - (section)->VirtualAddress) \ |
8747ac3f EZ |
72 | + (filedata).file_base)) |
73 | ||
b2fc9f3d | 74 | Lisp_Object Qhigh, Qlow; |
817abdf6 | 75 | |
6cdfb6e6 RS |
76 | /* Signal handlers...SIG_DFL == 0 so this is initialized correctly. */ |
77 | static signal_handler sig_handlers[NSIG]; | |
78 | ||
c06c382a EZ |
79 | static sigset_t sig_mask; |
80 | ||
81 | static CRITICAL_SECTION crit_sig; | |
82 | ||
16b22fef | 83 | /* Improve on the CRT 'signal' implementation so that we could record |
c06c382a | 84 | the SIGCHLD handler and fake interval timers. */ |
177c0ea7 | 85 | signal_handler |
c519b5e1 | 86 | sys_signal (int sig, signal_handler handler) |
6cdfb6e6 RS |
87 | { |
88 | signal_handler old; | |
177c0ea7 | 89 | |
16b22fef | 90 | /* SIGCHLD is needed for supporting subprocesses, see sys_kill |
c06c382a EZ |
91 | below. SIGALRM and SIGPROF are used by setitimer. All the |
92 | others are the only ones supported by the MS runtime. */ | |
16b22fef | 93 | if (!(sig == SIGCHLD || sig == SIGSEGV || sig == SIGILL |
c06c382a EZ |
94 | || sig == SIGFPE || sig == SIGABRT || sig == SIGTERM |
95 | || sig == SIGALRM || sig == SIGPROF)) | |
6cdfb6e6 RS |
96 | { |
97 | errno = EINVAL; | |
98 | return SIG_ERR; | |
99 | } | |
100 | old = sig_handlers[sig]; | |
16b22fef EZ |
101 | /* SIGABRT is treated specially because w32.c installs term_ntproc |
102 | as its handler, so we don't want to override that afterwards. | |
103 | Aborting Emacs works specially anyway: either by calling | |
104 | emacs_abort directly or through terminate_due_to_signal, which | |
105 | calls emacs_abort through emacs_raise. */ | |
106 | if (!(sig == SIGABRT && old == term_ntproc)) | |
107 | { | |
108 | sig_handlers[sig] = handler; | |
c06c382a | 109 | if (!(sig == SIGCHLD || sig == SIGALRM || sig == SIGPROF)) |
16b22fef EZ |
110 | signal (sig, handler); |
111 | } | |
6cdfb6e6 RS |
112 | return old; |
113 | } | |
114 | ||
3e6d6928 EZ |
115 | /* Emulate sigaction. */ |
116 | int | |
117 | sigaction (int sig, const struct sigaction *act, struct sigaction *oact) | |
118 | { | |
16b22fef EZ |
119 | signal_handler old = SIG_DFL; |
120 | int retval = 0; | |
121 | ||
122 | if (act) | |
123 | old = sys_signal (sig, act->sa_handler); | |
124 | else if (oact) | |
125 | old = sig_handlers[sig]; | |
3e6d6928 | 126 | |
16b22fef | 127 | if (old == SIG_ERR) |
3e6d6928 EZ |
128 | { |
129 | errno = EINVAL; | |
16b22fef | 130 | retval = -1; |
3e6d6928 | 131 | } |
3e6d6928 EZ |
132 | if (oact) |
133 | { | |
134 | oact->sa_handler = old; | |
135 | oact->sa_flags = 0; | |
136 | oact->sa_mask = empty_mask; | |
137 | } | |
16b22fef | 138 | return retval; |
3e6d6928 EZ |
139 | } |
140 | ||
c06c382a EZ |
141 | /* Emulate signal sets and blocking of signals used by timers. */ |
142 | ||
143 | int | |
144 | sigemptyset (sigset_t *set) | |
145 | { | |
146 | *set = 0; | |
147 | return 0; | |
148 | } | |
149 | ||
150 | int | |
151 | sigaddset (sigset_t *set, int signo) | |
152 | { | |
153 | if (!set) | |
154 | { | |
155 | errno = EINVAL; | |
156 | return -1; | |
157 | } | |
158 | if (signo < 0 || signo >= NSIG) | |
159 | { | |
160 | errno = EINVAL; | |
161 | return -1; | |
162 | } | |
163 | ||
164 | *set |= (1U << signo); | |
165 | ||
166 | return 0; | |
167 | } | |
168 | ||
169 | int | |
170 | sigfillset (sigset_t *set) | |
171 | { | |
172 | if (!set) | |
173 | { | |
174 | errno = EINVAL; | |
175 | return -1; | |
176 | } | |
177 | ||
178 | *set = 0xFFFFFFFF; | |
179 | return 0; | |
180 | } | |
181 | ||
182 | int | |
183 | sigprocmask (int how, const sigset_t *set, sigset_t *oset) | |
184 | { | |
185 | if (!(how == SIG_BLOCK || how == SIG_UNBLOCK || how == SIG_SETMASK)) | |
186 | { | |
187 | errno = EINVAL; | |
188 | return -1; | |
189 | } | |
190 | ||
191 | if (oset) | |
192 | *oset = sig_mask; | |
193 | ||
194 | if (!set) | |
195 | return 0; | |
196 | ||
197 | switch (how) | |
198 | { | |
199 | case SIG_BLOCK: | |
200 | sig_mask |= *set; | |
201 | break; | |
202 | case SIG_SETMASK: | |
203 | sig_mask = *set; | |
204 | break; | |
205 | case SIG_UNBLOCK: | |
206 | /* FIXME: Catch signals that are blocked and reissue them when | |
207 | they are unblocked. Important for SIGALRM and SIGPROF only. */ | |
208 | sig_mask &= ~(*set); | |
209 | break; | |
210 | } | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | int | |
216 | pthread_sigmask (int how, const sigset_t *set, sigset_t *oset) | |
217 | { | |
218 | if (sigprocmask (how, set, oset) == -1) | |
219 | return EINVAL; | |
220 | return 0; | |
221 | } | |
222 | ||
223 | int | |
224 | sigismember (const sigset_t *set, int signo) | |
225 | { | |
226 | if (signo < 0 || signo >= NSIG) | |
227 | { | |
228 | errno = EINVAL; | |
229 | return -1; | |
230 | } | |
231 | if (signo > sizeof (*set) * BITS_PER_CHAR) | |
232 | emacs_abort (); | |
233 | ||
234 | return (*set & (1U << signo)) != 0; | |
235 | } | |
236 | ||
dd0333b6 PE |
237 | pid_t |
238 | getpgrp (void) | |
c06c382a | 239 | { |
dd0333b6 | 240 | return getpid (); |
c06c382a EZ |
241 | } |
242 | ||
7e8b50d9 | 243 | pid_t |
dd0333b6 | 244 | tcgetpgrp (int fd) |
7e8b50d9 EZ |
245 | { |
246 | return getpid (); | |
247 | } | |
248 | ||
249 | int | |
250 | setpgid (pid_t pid, pid_t pgid) | |
251 | { | |
252 | return 0; | |
253 | } | |
254 | ||
dd0333b6 PE |
255 | pid_t |
256 | setsid (void) | |
257 | { | |
258 | return getpid (); | |
259 | } | |
260 | ||
c06c382a EZ |
261 | /* Emulations of interval timers. |
262 | ||
263 | Limitations: only ITIMER_REAL and ITIMER_PROF are supported. | |
264 | ||
265 | Implementation: a separate thread is started for each timer type, | |
266 | the thread calls the appropriate signal handler when the timer | |
267 | expires, after stopping the thread which installed the timer. */ | |
268 | ||
c06c382a | 269 | struct itimer_data { |
2e612797 EZ |
270 | volatile ULONGLONG expire; |
271 | volatile ULONGLONG reload; | |
272 | volatile int terminate; | |
c06c382a EZ |
273 | int type; |
274 | HANDLE caller_thread; | |
275 | HANDLE timer_thread; | |
276 | }; | |
277 | ||
6c16c13e | 278 | static ULONGLONG ticks_now; |
c06c382a | 279 | static struct itimer_data real_itimer, prof_itimer; |
6c16c13e | 280 | static ULONGLONG clocks_min; |
f0e5f225 EZ |
281 | /* If non-zero, itimers are disabled. Used during shutdown, when we |
282 | delete the critical sections used by the timer threads. */ | |
283 | static int disable_itimers; | |
c06c382a EZ |
284 | |
285 | static CRITICAL_SECTION crit_real, crit_prof; | |
286 | ||
15cc05e9 | 287 | /* GetThreadTimes is not available on Windows 9X and possibly also on 2K. */ |
6c16c13e EZ |
288 | typedef BOOL (WINAPI *GetThreadTimes_Proc) ( |
289 | HANDLE hThread, | |
290 | LPFILETIME lpCreationTime, | |
291 | LPFILETIME lpExitTime, | |
292 | LPFILETIME lpKernelTime, | |
293 | LPFILETIME lpUserTime); | |
294 | ||
295 | static GetThreadTimes_Proc s_pfn_Get_Thread_Times; | |
296 | ||
640bf8ad EZ |
297 | #define MAX_SINGLE_SLEEP 30 |
298 | #define TIMER_TICKS_PER_SEC 1000 | |
299 | ||
6c16c13e EZ |
300 | /* Return a suitable time value, in 1-ms units, for THREAD, a handle |
301 | to a thread. If THREAD is NULL or an invalid handle, return the | |
302 | current wall-clock time since January 1, 1601 (UTC). Otherwise, | |
303 | return the sum of kernel and user times used by THREAD since it was | |
304 | created, plus its creation time. */ | |
305 | static ULONGLONG | |
306 | w32_get_timer_time (HANDLE thread) | |
307 | { | |
308 | ULONGLONG retval; | |
309 | int use_system_time = 1; | |
640bf8ad EZ |
310 | /* The functions below return times in 100-ns units. */ |
311 | const int tscale = 10 * TIMER_TICKS_PER_SEC; | |
6c16c13e EZ |
312 | |
313 | if (thread && thread != INVALID_HANDLE_VALUE | |
314 | && s_pfn_Get_Thread_Times != NULL) | |
315 | { | |
316 | FILETIME creation_ftime, exit_ftime, kernel_ftime, user_ftime; | |
317 | ULARGE_INTEGER temp_creation, temp_kernel, temp_user; | |
318 | ||
319 | if (s_pfn_Get_Thread_Times (thread, &creation_ftime, &exit_ftime, | |
320 | &kernel_ftime, &user_ftime)) | |
321 | { | |
322 | use_system_time = 0; | |
323 | temp_creation.LowPart = creation_ftime.dwLowDateTime; | |
324 | temp_creation.HighPart = creation_ftime.dwHighDateTime; | |
325 | temp_kernel.LowPart = kernel_ftime.dwLowDateTime; | |
326 | temp_kernel.HighPart = kernel_ftime.dwHighDateTime; | |
327 | temp_user.LowPart = user_ftime.dwLowDateTime; | |
328 | temp_user.HighPart = user_ftime.dwHighDateTime; | |
329 | retval = | |
640bf8ad EZ |
330 | temp_creation.QuadPart / tscale + temp_kernel.QuadPart / tscale |
331 | + temp_user.QuadPart / tscale; | |
6c16c13e EZ |
332 | } |
333 | else | |
334 | DebPrint (("GetThreadTimes failed with error code %lu\n", | |
335 | GetLastError ())); | |
336 | } | |
c06c382a | 337 | |
6c16c13e EZ |
338 | if (use_system_time) |
339 | { | |
340 | FILETIME current_ftime; | |
341 | ULARGE_INTEGER temp; | |
342 | ||
343 | GetSystemTimeAsFileTime (¤t_ftime); | |
344 | ||
345 | temp.LowPart = current_ftime.dwLowDateTime; | |
346 | temp.HighPart = current_ftime.dwHighDateTime; | |
347 | ||
640bf8ad | 348 | retval = temp.QuadPart / tscale; |
6c16c13e EZ |
349 | } |
350 | ||
351 | return retval; | |
352 | } | |
353 | ||
6c16c13e | 354 | /* Thread function for a timer thread. */ |
c06c382a EZ |
355 | static DWORD WINAPI |
356 | timer_loop (LPVOID arg) | |
357 | { | |
358 | struct itimer_data *itimer = (struct itimer_data *)arg; | |
359 | int which = itimer->type; | |
360 | int sig = (which == ITIMER_REAL) ? SIGALRM : SIGPROF; | |
361 | CRITICAL_SECTION *crit = (which == ITIMER_REAL) ? &crit_real : &crit_prof; | |
640bf8ad | 362 | const DWORD max_sleep = MAX_SINGLE_SLEEP * 1000 / TIMER_TICKS_PER_SEC; |
6c16c13e | 363 | HANDLE hth = (which == ITIMER_REAL) ? NULL : itimer->caller_thread; |
c06c382a EZ |
364 | |
365 | while (1) | |
366 | { | |
367 | DWORD sleep_time; | |
368 | signal_handler handler; | |
6c16c13e | 369 | ULONGLONG now, expire, reload; |
c06c382a EZ |
370 | |
371 | /* Load new values if requested by setitimer. */ | |
372 | EnterCriticalSection (crit); | |
373 | expire = itimer->expire; | |
374 | reload = itimer->reload; | |
375 | LeaveCriticalSection (crit); | |
376 | if (itimer->terminate) | |
377 | return 0; | |
378 | ||
6c16c13e | 379 | if (expire == 0) |
c06c382a EZ |
380 | { |
381 | /* We are idle. */ | |
382 | Sleep (max_sleep); | |
383 | continue; | |
384 | } | |
385 | ||
6c16c13e | 386 | if (expire > (now = w32_get_timer_time (hth))) |
c06c382a EZ |
387 | sleep_time = expire - now; |
388 | else | |
389 | sleep_time = 0; | |
390 | /* Don't sleep too long at a time, to be able to see the | |
391 | termination flag without too long a delay. */ | |
392 | while (sleep_time > max_sleep) | |
393 | { | |
394 | if (itimer->terminate) | |
395 | return 0; | |
396 | Sleep (max_sleep); | |
6c16c13e | 397 | EnterCriticalSection (crit); |
c06c382a | 398 | expire = itimer->expire; |
6c16c13e EZ |
399 | LeaveCriticalSection (crit); |
400 | sleep_time = | |
401 | (expire > (now = w32_get_timer_time (hth))) ? expire - now : 0; | |
c06c382a EZ |
402 | } |
403 | if (itimer->terminate) | |
404 | return 0; | |
405 | if (sleep_time > 0) | |
406 | { | |
640bf8ad | 407 | Sleep (sleep_time * 1000 / TIMER_TICKS_PER_SEC); |
c06c382a EZ |
408 | /* Always sleep past the expiration time, to make sure we |
409 | never call the handler _before_ the expiration time, | |
ace917bd | 410 | always slightly after it. Sleep(5) makes sure we don't |
6c16c13e EZ |
411 | hog the CPU by calling 'w32_get_timer_time' with high |
412 | frequency, and also let other threads work. */ | |
413 | while (w32_get_timer_time (hth) < expire) | |
ace917bd | 414 | Sleep (5); |
c06c382a EZ |
415 | } |
416 | ||
6c16c13e EZ |
417 | EnterCriticalSection (crit); |
418 | expire = itimer->expire; | |
419 | LeaveCriticalSection (crit); | |
420 | if (expire == 0) | |
c06c382a EZ |
421 | continue; |
422 | ||
423 | /* Time's up. */ | |
424 | handler = sig_handlers[sig]; | |
425 | if (!(handler == SIG_DFL || handler == SIG_IGN || handler == SIG_ERR) | |
426 | /* FIXME: Don't ignore masked signals. Instead, record that | |
427 | they happened and reissue them when the signal is | |
428 | unblocked. */ | |
429 | && !sigismember (&sig_mask, sig) | |
430 | /* Simulate masking of SIGALRM and SIGPROF when processing | |
431 | fatal signals. */ | |
432 | && !fatal_error_in_progress | |
433 | && itimer->caller_thread) | |
434 | { | |
435 | /* Simulate a signal delivered to the thread which installed | |
436 | the timer, by suspending that thread while the handler | |
437 | runs. */ | |
730b2d8f EZ |
438 | HANDLE th = itimer->caller_thread; |
439 | DWORD result = SuspendThread (th); | |
c06c382a EZ |
440 | |
441 | if (result == (DWORD)-1) | |
db9848e4 EZ |
442 | return 2; |
443 | ||
c06c382a | 444 | handler (sig); |
730b2d8f | 445 | ResumeThread (th); |
c06c382a EZ |
446 | } |
447 | ||
c06c382a EZ |
448 | /* Update expiration time and loop. */ |
449 | EnterCriticalSection (crit); | |
450 | expire = itimer->expire; | |
6c16c13e EZ |
451 | if (expire == 0) |
452 | { | |
453 | LeaveCriticalSection (crit); | |
454 | continue; | |
455 | } | |
c06c382a EZ |
456 | reload = itimer->reload; |
457 | if (reload > 0) | |
458 | { | |
6c16c13e | 459 | now = w32_get_timer_time (hth); |
c06c382a EZ |
460 | if (expire <= now) |
461 | { | |
6c16c13e | 462 | ULONGLONG lag = now - expire; |
c06c382a EZ |
463 | |
464 | /* If we missed some opportunities (presumably while | |
465 | sleeping or while the signal handler ran), skip | |
466 | them. */ | |
467 | if (lag > reload) | |
468 | expire = now - (lag % reload); | |
469 | ||
470 | expire += reload; | |
471 | } | |
472 | } | |
473 | else | |
474 | expire = 0; /* become idle */ | |
475 | itimer->expire = expire; | |
476 | LeaveCriticalSection (crit); | |
477 | } | |
478 | return 0; | |
479 | } | |
480 | ||
481 | static void | |
482 | stop_timer_thread (int which) | |
483 | { | |
484 | struct itimer_data *itimer = | |
485 | (which == ITIMER_REAL) ? &real_itimer : &prof_itimer; | |
486 | int i; | |
a65fbb5f EZ |
487 | DWORD err, exit_code = 255; |
488 | BOOL status; | |
c06c382a EZ |
489 | |
490 | /* Signal the thread that it should terminate. */ | |
491 | itimer->terminate = 1; | |
492 | ||
493 | if (itimer->timer_thread == NULL) | |
494 | return; | |
495 | ||
496 | /* Wait for the timer thread to terminate voluntarily, then kill it | |
497 | if it doesn't. This loop waits twice more than the maximum | |
498 | amount of time a timer thread sleeps, see above. */ | |
499 | for (i = 0; i < MAX_SINGLE_SLEEP / 5; i++) | |
500 | { | |
501 | if (!((status = GetExitCodeThread (itimer->timer_thread, &exit_code)) | |
502 | && exit_code == STILL_ACTIVE)) | |
503 | break; | |
504 | Sleep (10); | |
505 | } | |
506 | if ((status == FALSE && (err = GetLastError ()) == ERROR_INVALID_HANDLE) | |
507 | || exit_code == STILL_ACTIVE) | |
508 | { | |
509 | if (!(status == FALSE && err == ERROR_INVALID_HANDLE)) | |
510 | TerminateThread (itimer->timer_thread, 0); | |
511 | } | |
512 | ||
513 | /* Clean up. */ | |
514 | CloseHandle (itimer->timer_thread); | |
515 | itimer->timer_thread = NULL; | |
516 | if (itimer->caller_thread) | |
517 | { | |
518 | CloseHandle (itimer->caller_thread); | |
519 | itimer->caller_thread = NULL; | |
520 | } | |
521 | } | |
522 | ||
523 | /* This is called at shutdown time from term_ntproc. */ | |
524 | void | |
525 | term_timers (void) | |
526 | { | |
527 | if (real_itimer.timer_thread) | |
528 | stop_timer_thread (ITIMER_REAL); | |
529 | if (prof_itimer.timer_thread) | |
530 | stop_timer_thread (ITIMER_PROF); | |
531 | ||
f0e5f225 EZ |
532 | /* We are going to delete the critical sections, so timers cannot |
533 | work after this. */ | |
534 | disable_itimers = 1; | |
535 | ||
c06c382a EZ |
536 | DeleteCriticalSection (&crit_real); |
537 | DeleteCriticalSection (&crit_prof); | |
538 | DeleteCriticalSection (&crit_sig); | |
539 | } | |
540 | ||
541 | /* This is called at initialization time from init_ntproc. */ | |
542 | void | |
543 | init_timers (void) | |
544 | { | |
5c6ce1c7 | 545 | /* GetThreadTimes is not available on all versions of Windows, so |
6c16c13e EZ |
546 | need to probe for its availability dynamically, and call it |
547 | through a pointer. */ | |
548 | s_pfn_Get_Thread_Times = NULL; /* in case dumped Emacs comes with a value */ | |
549 | if (os_subtype != OS_9X) | |
550 | s_pfn_Get_Thread_Times = | |
551 | (GetThreadTimes_Proc)GetProcAddress (GetModuleHandle ("kernel32.dll"), | |
552 | "GetThreadTimes"); | |
553 | ||
c06c382a EZ |
554 | /* Make sure we start with zeroed out itimer structures, since |
555 | dumping may have left there traces of threads long dead. */ | |
556 | memset (&real_itimer, 0, sizeof real_itimer); | |
557 | memset (&prof_itimer, 0, sizeof prof_itimer); | |
558 | ||
559 | InitializeCriticalSection (&crit_real); | |
560 | InitializeCriticalSection (&crit_prof); | |
561 | InitializeCriticalSection (&crit_sig); | |
f0e5f225 EZ |
562 | |
563 | disable_itimers = 0; | |
c06c382a EZ |
564 | } |
565 | ||
566 | static int | |
567 | start_timer_thread (int which) | |
568 | { | |
569 | DWORD exit_code; | |
730b2d8f | 570 | HANDLE th; |
c06c382a EZ |
571 | struct itimer_data *itimer = |
572 | (which == ITIMER_REAL) ? &real_itimer : &prof_itimer; | |
573 | ||
574 | if (itimer->timer_thread | |
575 | && GetExitCodeThread (itimer->timer_thread, &exit_code) | |
576 | && exit_code == STILL_ACTIVE) | |
577 | return 0; | |
578 | ||
730b2d8f EZ |
579 | /* Clean up after possibly exited thread. */ |
580 | if (itimer->timer_thread) | |
581 | { | |
582 | CloseHandle (itimer->timer_thread); | |
583 | itimer->timer_thread = NULL; | |
584 | } | |
585 | if (itimer->caller_thread) | |
586 | { | |
587 | CloseHandle (itimer->caller_thread); | |
588 | itimer->caller_thread = NULL; | |
589 | } | |
590 | ||
c06c382a | 591 | /* Start a new thread. */ |
730b2d8f EZ |
592 | if (!DuplicateHandle (GetCurrentProcess (), GetCurrentThread (), |
593 | GetCurrentProcess (), &th, 0, FALSE, | |
594 | DUPLICATE_SAME_ACCESS)) | |
595 | { | |
596 | errno = ESRCH; | |
597 | return -1; | |
598 | } | |
c06c382a EZ |
599 | itimer->terminate = 0; |
600 | itimer->type = which; | |
730b2d8f | 601 | itimer->caller_thread = th; |
c06c382a EZ |
602 | /* Request that no more than 64KB of stack be reserved for this |
603 | thread, to avoid reserving too much memory, which would get in | |
604 | the way of threads we start to wait for subprocesses. See also | |
605 | new_child below. */ | |
606 | itimer->timer_thread = CreateThread (NULL, 64 * 1024, timer_loop, | |
607 | (void *)itimer, 0x00010000, NULL); | |
608 | ||
609 | if (!itimer->timer_thread) | |
610 | { | |
611 | CloseHandle (itimer->caller_thread); | |
612 | itimer->caller_thread = NULL; | |
613 | errno = EAGAIN; | |
614 | return -1; | |
615 | } | |
616 | ||
617 | /* This is needed to make sure that the timer thread running for | |
618 | profiling gets CPU as soon as the Sleep call terminates. */ | |
619 | if (which == ITIMER_PROF) | |
730b2d8f | 620 | SetThreadPriority (itimer->timer_thread, THREAD_PRIORITY_TIME_CRITICAL); |
c06c382a | 621 | |
3e6d6928 EZ |
622 | return 0; |
623 | } | |
624 | ||
c06c382a EZ |
625 | /* Most of the code of getitimer and setitimer (but not of their |
626 | subroutines) was shamelessly stolen from itimer.c in the DJGPP | |
627 | library, see www.delorie.com/djgpp. */ | |
628 | int | |
629 | getitimer (int which, struct itimerval *value) | |
630 | { | |
6c16c13e EZ |
631 | volatile ULONGLONG *t_expire; |
632 | volatile ULONGLONG *t_reload; | |
633 | ULONGLONG expire, reload; | |
c06c382a EZ |
634 | __int64 usecs; |
635 | CRITICAL_SECTION *crit; | |
6c16c13e | 636 | struct itimer_data *itimer; |
c06c382a | 637 | |
f0e5f225 EZ |
638 | if (disable_itimers) |
639 | return -1; | |
640 | ||
c06c382a EZ |
641 | if (!value) |
642 | { | |
643 | errno = EFAULT; | |
644 | return -1; | |
645 | } | |
646 | ||
647 | if (which != ITIMER_REAL && which != ITIMER_PROF) | |
648 | { | |
649 | errno = EINVAL; | |
650 | return -1; | |
651 | } | |
652 | ||
6c16c13e EZ |
653 | itimer = (which == ITIMER_REAL) ? &real_itimer : &prof_itimer; |
654 | ||
6c16c13e EZ |
655 | ticks_now = w32_get_timer_time ((which == ITIMER_REAL) |
656 | ? NULL | |
730b2d8f | 657 | : GetCurrentThread ()); |
6c16c13e EZ |
658 | |
659 | t_expire = &itimer->expire; | |
660 | t_reload = &itimer->reload; | |
c06c382a EZ |
661 | crit = (which == ITIMER_REAL) ? &crit_real : &crit_prof; |
662 | ||
663 | EnterCriticalSection (crit); | |
664 | reload = *t_reload; | |
665 | expire = *t_expire; | |
666 | LeaveCriticalSection (crit); | |
667 | ||
668 | if (expire) | |
669 | expire -= ticks_now; | |
670 | ||
640bf8ad EZ |
671 | value->it_value.tv_sec = expire / TIMER_TICKS_PER_SEC; |
672 | usecs = | |
673 | (expire % TIMER_TICKS_PER_SEC) * (__int64)1000000 / TIMER_TICKS_PER_SEC; | |
c06c382a | 674 | value->it_value.tv_usec = usecs; |
640bf8ad EZ |
675 | value->it_interval.tv_sec = reload / TIMER_TICKS_PER_SEC; |
676 | usecs = | |
677 | (reload % TIMER_TICKS_PER_SEC) * (__int64)1000000 / TIMER_TICKS_PER_SEC; | |
c06c382a EZ |
678 | value->it_interval.tv_usec= usecs; |
679 | ||
680 | return 0; | |
681 | } | |
682 | ||
683 | int | |
684 | setitimer(int which, struct itimerval *value, struct itimerval *ovalue) | |
685 | { | |
6c16c13e EZ |
686 | volatile ULONGLONG *t_expire, *t_reload; |
687 | ULONGLONG expire, reload, expire_old, reload_old; | |
c06c382a EZ |
688 | __int64 usecs; |
689 | CRITICAL_SECTION *crit; | |
6c16c13e | 690 | struct itimerval tem, *ptem; |
c06c382a | 691 | |
f0e5f225 EZ |
692 | if (disable_itimers) |
693 | return -1; | |
694 | ||
c06c382a EZ |
695 | /* Posix systems expect timer values smaller than the resolution of |
696 | the system clock be rounded up to the clock resolution. First | |
697 | time we are called, measure the clock tick resolution. */ | |
698 | if (!clocks_min) | |
699 | { | |
6c16c13e | 700 | ULONGLONG t1, t2; |
c06c382a | 701 | |
6c16c13e EZ |
702 | for (t1 = w32_get_timer_time (NULL); |
703 | (t2 = w32_get_timer_time (NULL)) == t1; ) | |
c06c382a EZ |
704 | ; |
705 | clocks_min = t2 - t1; | |
706 | } | |
707 | ||
708 | if (ovalue) | |
6c16c13e | 709 | ptem = ovalue; |
c06c382a | 710 | else |
6c16c13e | 711 | ptem = &tem; |
c06c382a | 712 | |
6c16c13e EZ |
713 | if (getitimer (which, ptem)) /* also sets ticks_now */ |
714 | return -1; /* errno already set */ | |
c06c382a EZ |
715 | |
716 | t_expire = | |
717 | (which == ITIMER_REAL) ? &real_itimer.expire : &prof_itimer.expire; | |
718 | t_reload = | |
719 | (which == ITIMER_REAL) ? &real_itimer.reload : &prof_itimer.reload; | |
720 | ||
721 | crit = (which == ITIMER_REAL) ? &crit_real : &crit_prof; | |
722 | ||
723 | if (!value | |
724 | || (value->it_value.tv_sec == 0 && value->it_value.tv_usec == 0)) | |
725 | { | |
726 | EnterCriticalSection (crit); | |
727 | /* Disable the timer. */ | |
728 | *t_expire = 0; | |
729 | *t_reload = 0; | |
730 | LeaveCriticalSection (crit); | |
731 | return 0; | |
732 | } | |
733 | ||
640bf8ad | 734 | reload = value->it_interval.tv_sec * TIMER_TICKS_PER_SEC; |
c06c382a EZ |
735 | |
736 | usecs = value->it_interval.tv_usec; | |
737 | if (value->it_interval.tv_sec == 0 | |
640bf8ad | 738 | && usecs && usecs * TIMER_TICKS_PER_SEC < clocks_min * 1000000) |
c06c382a EZ |
739 | reload = clocks_min; |
740 | else | |
741 | { | |
640bf8ad | 742 | usecs *= TIMER_TICKS_PER_SEC; |
c06c382a EZ |
743 | reload += usecs / 1000000; |
744 | } | |
745 | ||
640bf8ad | 746 | expire = value->it_value.tv_sec * TIMER_TICKS_PER_SEC; |
c06c382a EZ |
747 | usecs = value->it_value.tv_usec; |
748 | if (value->it_value.tv_sec == 0 | |
640bf8ad | 749 | && usecs * TIMER_TICKS_PER_SEC < clocks_min * 1000000) |
c06c382a EZ |
750 | expire = clocks_min; |
751 | else | |
752 | { | |
640bf8ad | 753 | usecs *= TIMER_TICKS_PER_SEC; |
c06c382a EZ |
754 | expire += usecs / 1000000; |
755 | } | |
756 | ||
757 | expire += ticks_now; | |
758 | ||
759 | EnterCriticalSection (crit); | |
760 | expire_old = *t_expire; | |
761 | reload_old = *t_reload; | |
762 | if (!(expire == expire_old && reload == reload_old)) | |
763 | { | |
764 | *t_reload = reload; | |
765 | *t_expire = expire; | |
766 | } | |
767 | LeaveCriticalSection (crit); | |
768 | ||
769 | return start_timer_thread (which); | |
770 | } | |
771 | ||
772 | int | |
773 | alarm (int seconds) | |
774 | { | |
4cdfbb89 EZ |
775 | #ifdef HAVE_SETITIMER |
776 | struct itimerval new_values, old_values; | |
c06c382a EZ |
777 | |
778 | new_values.it_value.tv_sec = seconds; | |
779 | new_values.it_value.tv_usec = 0; | |
780 | new_values.it_interval.tv_sec = new_values.it_interval.tv_usec = 0; | |
781 | ||
4cdfbb89 EZ |
782 | if (setitimer (ITIMER_REAL, &new_values, &old_values) < 0) |
783 | return 0; | |
784 | return old_values.it_value.tv_sec; | |
785 | #else | |
c06c382a | 786 | return seconds; |
4cdfbb89 | 787 | #endif |
c06c382a EZ |
788 | } |
789 | ||
c519b5e1 GV |
790 | /* Defined in <process.h> which conflicts with the local copy */ |
791 | #define _P_NOWAIT 1 | |
792 | ||
793 | /* Child process management list. */ | |
794 | int child_proc_count = 0; | |
795 | child_process child_procs[ MAX_CHILDREN ]; | |
c519b5e1 | 796 | |
24f981c9 | 797 | static DWORD WINAPI reader_thread (void *arg); |
c519b5e1 | 798 | |
6cdfb6e6 | 799 | /* Find an unused process slot. */ |
c519b5e1 | 800 | child_process * |
6cdfb6e6 RS |
801 | new_child (void) |
802 | { | |
803 | child_process *cp; | |
c519b5e1 | 804 | DWORD id; |
177c0ea7 | 805 | |
9d4f32e8 | 806 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
7efa3fb3 | 807 | if (!CHILD_ACTIVE (cp) && cp->procinfo.hProcess == NULL) |
e1dbe924 | 808 | goto Initialize; |
0e4e7b74 EZ |
809 | if (child_proc_count == MAX_CHILDREN) |
810 | { | |
ef862e20 | 811 | int i = 0; |
a7727d05 | 812 | child_process *dead_cp = NULL; |
ef862e20 | 813 | |
0e4e7b74 EZ |
814 | DebPrint (("new_child: No vacant slots, looking for dead processes\n")); |
815 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) | |
816 | if (!CHILD_ACTIVE (cp) && cp->procinfo.hProcess) | |
817 | { | |
818 | DWORD status = 0; | |
819 | ||
820 | if (!GetExitCodeProcess (cp->procinfo.hProcess, &status)) | |
821 | { | |
822 | DebPrint (("new_child.GetExitCodeProcess: error %lu for PID %lu\n", | |
823 | GetLastError (), cp->procinfo.dwProcessId)); | |
824 | status = STILL_ACTIVE; | |
825 | } | |
826 | if (status != STILL_ACTIVE | |
827 | || WaitForSingleObject (cp->procinfo.hProcess, 0) == WAIT_OBJECT_0) | |
828 | { | |
ef862e20 EZ |
829 | DebPrint (("new_child: Freeing slot of dead process %d, fd %d\n", |
830 | cp->procinfo.dwProcessId, cp->fd)); | |
0e4e7b74 EZ |
831 | CloseHandle (cp->procinfo.hProcess); |
832 | cp->procinfo.hProcess = NULL; | |
833 | CloseHandle (cp->procinfo.hThread); | |
834 | cp->procinfo.hThread = NULL; | |
ef862e20 EZ |
835 | /* Free up to 2 dead slots at a time, so that if we |
836 | have a lot of them, they will eventually all be | |
837 | freed when the tornado ends. */ | |
838 | if (i == 0) | |
839 | dead_cp = cp; | |
840 | else | |
a7727d05 | 841 | break; |
ef862e20 | 842 | i++; |
0e4e7b74 EZ |
843 | } |
844 | } | |
a7727d05 EZ |
845 | if (dead_cp) |
846 | { | |
847 | cp = dead_cp; | |
848 | goto Initialize; | |
849 | } | |
0e4e7b74 | 850 | } |
c519b5e1 GV |
851 | if (child_proc_count == MAX_CHILDREN) |
852 | return NULL; | |
853 | cp = &child_procs[child_proc_count++]; | |
854 | ||
e1dbe924 | 855 | Initialize: |
17ddfd15 EZ |
856 | /* Last opportunity to avoid leaking handles before we forget them |
857 | for good. */ | |
858 | if (cp->procinfo.hProcess) | |
859 | CloseHandle (cp->procinfo.hProcess); | |
860 | if (cp->procinfo.hThread) | |
861 | CloseHandle (cp->procinfo.hThread); | |
ed3751c8 | 862 | memset (cp, 0, sizeof (*cp)); |
c519b5e1 GV |
863 | cp->fd = -1; |
864 | cp->pid = -1; | |
865 | cp->procinfo.hProcess = NULL; | |
866 | cp->status = STATUS_READ_ERROR; | |
867 | ||
868 | /* use manual reset event so that select() will function properly */ | |
869 | cp->char_avail = CreateEvent (NULL, TRUE, FALSE, NULL); | |
870 | if (cp->char_avail) | |
871 | { | |
872 | cp->char_consumed = CreateEvent (NULL, FALSE, FALSE, NULL); | |
873 | if (cp->char_consumed) | |
874 | { | |
0d887c7d EZ |
875 | /* The 0x00010000 flag is STACK_SIZE_PARAM_IS_A_RESERVATION. |
876 | It means that the 64K stack we are requesting in the 2nd | |
877 | argument is how much memory should be reserved for the | |
878 | stack. If we don't use this flag, the memory requested | |
879 | by the 2nd argument is the amount actually _committed_, | |
880 | but Windows reserves 8MB of memory for each thread's | |
881 | stack. (The 8MB figure comes from the -stack | |
882 | command-line argument we pass to the linker when building | |
883 | Emacs, but that's because we need a large stack for | |
884 | Emacs's main thread.) Since we request 2GB of reserved | |
885 | memory at startup (see w32heap.c), which is close to the | |
886 | maximum memory available for a 32-bit process on Windows, | |
887 | the 8MB reservation for each thread causes failures in | |
888 | starting subprocesses, because we create a thread running | |
889 | reader_thread for each subprocess. As 8MB of stack is | |
890 | way too much for reader_thread, forcing Windows to | |
891 | reserve less wins the day. */ | |
892 | cp->thrd = CreateThread (NULL, 64 * 1024, reader_thread, cp, | |
893 | 0x00010000, &id); | |
c519b5e1 GV |
894 | if (cp->thrd) |
895 | return cp; | |
896 | } | |
897 | } | |
898 | delete_child (cp); | |
899 | return NULL; | |
900 | } | |
901 | ||
177c0ea7 | 902 | void |
c519b5e1 GV |
903 | delete_child (child_process *cp) |
904 | { | |
905 | int i; | |
906 | ||
907 | /* Should not be deleting a child that is still needed. */ | |
908 | for (i = 0; i < MAXDESC; i++) | |
909 | if (fd_info[i].cp == cp) | |
1088b922 | 910 | emacs_abort (); |
c519b5e1 | 911 | |
7efa3fb3 | 912 | if (!CHILD_ACTIVE (cp) && cp->procinfo.hProcess == NULL) |
c519b5e1 GV |
913 | return; |
914 | ||
915 | /* reap thread if necessary */ | |
916 | if (cp->thrd) | |
917 | { | |
918 | DWORD rc; | |
919 | ||
920 | if (GetExitCodeThread (cp->thrd, &rc) && rc == STILL_ACTIVE) | |
921 | { | |
922 | /* let the thread exit cleanly if possible */ | |
923 | cp->status = STATUS_READ_ERROR; | |
924 | SetEvent (cp->char_consumed); | |
a017b515 | 925 | #if 0 |
c5e87d10 | 926 | /* We used to forcibly terminate the thread here, but it |
a017b515 JR |
927 | is normally unnecessary, and in abnormal cases, the worst that |
928 | will happen is we have an extra idle thread hanging around | |
929 | waiting for the zombie process. */ | |
c519b5e1 GV |
930 | if (WaitForSingleObject (cp->thrd, 1000) != WAIT_OBJECT_0) |
931 | { | |
932 | DebPrint (("delete_child.WaitForSingleObject (thread) failed " | |
933 | "with %lu for fd %ld\n", GetLastError (), cp->fd)); | |
934 | TerminateThread (cp->thrd, 0); | |
935 | } | |
a017b515 | 936 | #endif |
c519b5e1 GV |
937 | } |
938 | CloseHandle (cp->thrd); | |
939 | cp->thrd = NULL; | |
940 | } | |
941 | if (cp->char_avail) | |
942 | { | |
943 | CloseHandle (cp->char_avail); | |
944 | cp->char_avail = NULL; | |
945 | } | |
946 | if (cp->char_consumed) | |
947 | { | |
948 | CloseHandle (cp->char_consumed); | |
949 | cp->char_consumed = NULL; | |
950 | } | |
951 | ||
952 | /* update child_proc_count (highest numbered slot in use plus one) */ | |
953 | if (cp == child_procs + child_proc_count - 1) | |
954 | { | |
955 | for (i = child_proc_count-1; i >= 0; i--) | |
7efa3fb3 EZ |
956 | if (CHILD_ACTIVE (&child_procs[i]) |
957 | || child_procs[i].procinfo.hProcess != NULL) | |
c519b5e1 GV |
958 | { |
959 | child_proc_count = i + 1; | |
960 | break; | |
961 | } | |
962 | } | |
963 | if (i < 0) | |
964 | child_proc_count = 0; | |
6cdfb6e6 RS |
965 | } |
966 | ||
967 | /* Find a child by pid. */ | |
968 | static child_process * | |
969 | find_child_pid (DWORD pid) | |
970 | { | |
971 | child_process *cp; | |
c519b5e1 | 972 | |
9d4f32e8 | 973 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
7efa3fb3 EZ |
974 | if ((CHILD_ACTIVE (cp) || cp->procinfo.hProcess != NULL) |
975 | && pid == cp->pid) | |
6cdfb6e6 RS |
976 | return cp; |
977 | return NULL; | |
978 | } | |
979 | ||
3f940c5a EZ |
980 | void |
981 | release_listen_threads (void) | |
982 | { | |
983 | int i; | |
984 | ||
985 | for (i = child_proc_count - 1; i >= 0; i--) | |
986 | { | |
987 | if (CHILD_ACTIVE (&child_procs[i]) | |
988 | && (fd_info[child_procs[i].fd].flags & FILE_LISTEN)) | |
989 | child_procs[i].status = STATUS_READ_ERROR; | |
990 | } | |
991 | } | |
6cdfb6e6 | 992 | |
c519b5e1 GV |
993 | /* Thread proc for child process and socket reader threads. Each thread |
994 | is normally blocked until woken by select() to check for input by | |
04bf5b65 | 995 | reading one char. When the read completes, char_avail is signaled |
c519b5e1 | 996 | to wake up the select emulator and the thread blocks itself again. */ |
24f981c9 | 997 | static DWORD WINAPI |
6cdfb6e6 RS |
998 | reader_thread (void *arg) |
999 | { | |
1000 | child_process *cp; | |
177c0ea7 | 1001 | |
6cdfb6e6 RS |
1002 | /* Our identity */ |
1003 | cp = (child_process *)arg; | |
177c0ea7 | 1004 | |
6cdfb6e6 | 1005 | /* We have to wait for the go-ahead before we can start */ |
b2fc9f3d | 1006 | if (cp == NULL |
f067b8ec JB |
1007 | || WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0 |
1008 | || cp->fd < 0) | |
c519b5e1 GV |
1009 | return 1; |
1010 | ||
6cdfb6e6 RS |
1011 | for (;;) |
1012 | { | |
c519b5e1 GV |
1013 | int rc; |
1014 | ||
299614f3 | 1015 | if (cp->fd >= 0 && fd_info[cp->fd].flags & FILE_LISTEN) |
f9125cde KS |
1016 | rc = _sys_wait_accept (cp->fd); |
1017 | else | |
1018 | rc = _sys_read_ahead (cp->fd); | |
c519b5e1 | 1019 | |
e7ae8039 EZ |
1020 | /* Don't bother waiting for the event if we already have been |
1021 | told to exit by delete_child. */ | |
1022 | if (cp->status == STATUS_READ_ERROR || !cp->char_avail) | |
1023 | break; | |
1024 | ||
c519b5e1 GV |
1025 | /* The name char_avail is a misnomer - it really just means the |
1026 | read-ahead has completed, whether successfully or not. */ | |
6cdfb6e6 RS |
1027 | if (!SetEvent (cp->char_avail)) |
1028 | { | |
ef862e20 EZ |
1029 | DebPrint (("reader_thread.SetEvent(0x%x) failed with %lu for fd %ld (PID %d)\n", |
1030 | (DWORD_PTR)cp->char_avail, GetLastError (), | |
1031 | cp->fd, cp->pid)); | |
c519b5e1 GV |
1032 | return 1; |
1033 | } | |
1034 | ||
1035 | if (rc == STATUS_READ_ERROR) | |
1036 | return 1; | |
177c0ea7 | 1037 | |
6cdfb6e6 | 1038 | /* If the read died, the child has died so let the thread die */ |
c519b5e1 | 1039 | if (rc == STATUS_READ_FAILED) |
6cdfb6e6 | 1040 | break; |
177c0ea7 | 1041 | |
e7ae8039 EZ |
1042 | /* Don't bother waiting for the acknowledge if we already have |
1043 | been told to exit by delete_child. */ | |
1044 | if (cp->status == STATUS_READ_ERROR || !cp->char_consumed) | |
1045 | break; | |
1046 | ||
6cdfb6e6 RS |
1047 | /* Wait until our input is acknowledged before reading again */ |
1048 | if (WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0) | |
1049 | { | |
1050 | DebPrint (("reader_thread.WaitForSingleObject failed with " | |
1051 | "%lu for fd %ld\n", GetLastError (), cp->fd)); | |
1052 | break; | |
1053 | } | |
e7ae8039 EZ |
1054 | /* delete_child sets status to STATUS_READ_ERROR when it wants |
1055 | us to exit. */ | |
299614f3 EZ |
1056 | if (cp->status == STATUS_READ_ERROR) |
1057 | break; | |
6cdfb6e6 RS |
1058 | } |
1059 | return 0; | |
1060 | } | |
1061 | ||
17788cb3 EZ |
1062 | /* To avoid Emacs changing directory, we just record here the |
1063 | directory the new process should start in. This is set just before | |
1064 | calling sys_spawnve, and is not generally valid at any other time. | |
1065 | Note that this directory's name is UTF-8 encoded. */ | |
b2fc9f3d GV |
1066 | static char * process_dir; |
1067 | ||
177c0ea7 | 1068 | static BOOL |
a55a5f3c | 1069 | create_child (char *exe, char *cmdline, char *env, int is_gui_app, |
bd717ca4 | 1070 | pid_t * pPid, child_process *cp) |
6cdfb6e6 | 1071 | { |
6cdfb6e6 RS |
1072 | STARTUPINFO start; |
1073 | SECURITY_ATTRIBUTES sec_attrs; | |
42c95ffb | 1074 | #if 0 |
6cdfb6e6 | 1075 | SECURITY_DESCRIPTOR sec_desc; |
42c95ffb | 1076 | #endif |
82e7c0a9 | 1077 | DWORD flags; |
17788cb3 EZ |
1078 | char dir[ MAX_PATH ]; |
1079 | char *p; | |
177c0ea7 | 1080 | |
1088b922 | 1081 | if (cp == NULL) emacs_abort (); |
177c0ea7 | 1082 | |
6cdfb6e6 RS |
1083 | memset (&start, 0, sizeof (start)); |
1084 | start.cb = sizeof (start); | |
177c0ea7 | 1085 | |
58d4e829 | 1086 | #ifdef HAVE_NTGUI |
a55a5f3c | 1087 | if (NILP (Vw32_start_process_show_window) && !is_gui_app) |
0ecf7d36 RS |
1088 | start.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; |
1089 | else | |
1090 | start.dwFlags = STARTF_USESTDHANDLES; | |
58d4e829 GV |
1091 | start.wShowWindow = SW_HIDE; |
1092 | ||
1093 | start.hStdInput = GetStdHandle (STD_INPUT_HANDLE); | |
1094 | start.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE); | |
1095 | start.hStdError = GetStdHandle (STD_ERROR_HANDLE); | |
1096 | #endif /* HAVE_NTGUI */ | |
1097 | ||
42c95ffb | 1098 | #if 0 |
6cdfb6e6 RS |
1099 | /* Explicitly specify no security */ |
1100 | if (!InitializeSecurityDescriptor (&sec_desc, SECURITY_DESCRIPTOR_REVISION)) | |
c519b5e1 | 1101 | goto EH_Fail; |
6cdfb6e6 | 1102 | if (!SetSecurityDescriptorDacl (&sec_desc, TRUE, NULL, FALSE)) |
c519b5e1 | 1103 | goto EH_Fail; |
42c95ffb | 1104 | #endif |
6cdfb6e6 | 1105 | sec_attrs.nLength = sizeof (sec_attrs); |
42c95ffb | 1106 | sec_attrs.lpSecurityDescriptor = NULL /* &sec_desc */; |
6cdfb6e6 | 1107 | sec_attrs.bInheritHandle = FALSE; |
177c0ea7 | 1108 | |
17788cb3 EZ |
1109 | filename_to_ansi (process_dir, dir); |
1110 | /* Can't use unixtodos_filename here, since that needs its file name | |
1111 | argument encoded in UTF-8. OTOH, process_dir, which _is_ in | |
1112 | UTF-8, points, to the directory computed by our caller, and we | |
1113 | don't want to modify that, either. */ | |
1114 | for (p = dir; *p; p = CharNextA (p)) | |
1115 | if (*p == '/') | |
1116 | *p = '\\'; | |
82e7c0a9 AI |
1117 | |
1118 | flags = (!NILP (Vw32_start_process_share_console) | |
1119 | ? CREATE_NEW_PROCESS_GROUP | |
1120 | : CREATE_NEW_CONSOLE); | |
1121 | if (NILP (Vw32_start_process_inherit_error_mode)) | |
1122 | flags |= CREATE_DEFAULT_ERROR_MODE; | |
17788cb3 EZ |
1123 | if (!CreateProcessA (exe, cmdline, &sec_attrs, NULL, TRUE, |
1124 | flags, env, dir, &start, &cp->procinfo)) | |
c519b5e1 GV |
1125 | goto EH_Fail; |
1126 | ||
1127 | cp->pid = (int) cp->procinfo.dwProcessId; | |
1128 | ||
1129 | /* Hack for Windows 95, which assigns large (ie negative) pids */ | |
1130 | if (cp->pid < 0) | |
1131 | cp->pid = -cp->pid; | |
1132 | ||
c519b5e1 | 1133 | *pPid = cp->pid; |
b2fc9f3d | 1134 | |
6cdfb6e6 | 1135 | return TRUE; |
b2fc9f3d | 1136 | |
6cdfb6e6 | 1137 | EH_Fail: |
ed3751c8 | 1138 | DebPrint (("create_child.CreateProcess failed: %ld\n", GetLastError ());); |
6cdfb6e6 RS |
1139 | return FALSE; |
1140 | } | |
1141 | ||
5ec0337a | 1142 | /* create_child doesn't know what emacs's file handle will be for waiting |
6cdfb6e6 RS |
1143 | on output from the child, so we need to make this additional call |
1144 | to register the handle with the process | |
1145 | This way the select emulator knows how to match file handles with | |
1146 | entries in child_procs. */ | |
177c0ea7 | 1147 | void |
b0728617 | 1148 | register_child (pid_t pid, int fd) |
6cdfb6e6 RS |
1149 | { |
1150 | child_process *cp; | |
177c0ea7 | 1151 | |
b0728617 | 1152 | cp = find_child_pid ((DWORD)pid); |
6cdfb6e6 RS |
1153 | if (cp == NULL) |
1154 | { | |
1155 | DebPrint (("register_child unable to find pid %lu\n", pid)); | |
1156 | return; | |
1157 | } | |
177c0ea7 | 1158 | |
6cdfb6e6 RS |
1159 | #ifdef FULL_DEBUG |
1160 | DebPrint (("register_child registered fd %d with pid %lu\n", fd, pid)); | |
1161 | #endif | |
177c0ea7 | 1162 | |
6cdfb6e6 | 1163 | cp->fd = fd; |
6cdfb6e6 | 1164 | |
c519b5e1 GV |
1165 | /* thread is initially blocked until select is called; set status so |
1166 | that select will release thread */ | |
1167 | cp->status = STATUS_READ_ACKNOWLEDGED; | |
1168 | ||
1169 | /* attach child_process to fd_info */ | |
1170 | if (fd_info[fd].cp != NULL) | |
6cdfb6e6 | 1171 | { |
c519b5e1 | 1172 | DebPrint (("register_child: fd_info[%d] apparently in use!\n", fd)); |
1088b922 | 1173 | emacs_abort (); |
6cdfb6e6 | 1174 | } |
c519b5e1 GV |
1175 | |
1176 | fd_info[fd].cp = cp; | |
6cdfb6e6 RS |
1177 | } |
1178 | ||
7be7da6c | 1179 | /* Called from waitpid when a process exits. */ |
177c0ea7 | 1180 | static void |
c519b5e1 | 1181 | reap_subprocess (child_process *cp) |
6cdfb6e6 | 1182 | { |
c519b5e1 | 1183 | if (cp->procinfo.hProcess) |
6cdfb6e6 | 1184 | { |
c519b5e1 | 1185 | /* Reap the process */ |
b2fc9f3d GV |
1186 | #ifdef FULL_DEBUG |
1187 | /* Process should have already died before we are called. */ | |
1188 | if (WaitForSingleObject (cp->procinfo.hProcess, 0) != WAIT_OBJECT_0) | |
b0728617 | 1189 | DebPrint (("reap_subprocess: child for fd %d has not died yet!", cp->fd)); |
b2fc9f3d | 1190 | #endif |
c519b5e1 GV |
1191 | CloseHandle (cp->procinfo.hProcess); |
1192 | cp->procinfo.hProcess = NULL; | |
1193 | CloseHandle (cp->procinfo.hThread); | |
1194 | cp->procinfo.hThread = NULL; | |
6cdfb6e6 | 1195 | } |
c519b5e1 | 1196 | |
299614f3 EZ |
1197 | /* If cp->fd was not closed yet, we might be still reading the |
1198 | process output, so don't free its resources just yet. The call | |
1199 | to delete_child on behalf of this subprocess will be made by | |
1200 | sys_read when the subprocess output is fully read. */ | |
1201 | if (cp->fd < 0) | |
c519b5e1 | 1202 | delete_child (cp); |
6cdfb6e6 RS |
1203 | } |
1204 | ||
22bae83f EZ |
1205 | /* Wait for a child process specified by PID, or for any of our |
1206 | existing child processes (if PID is nonpositive) to die. When it | |
1207 | does, close its handle. Return the pid of the process that died | |
1208 | and fill in STATUS if non-NULL. */ | |
22759c72 | 1209 | |
22bae83f EZ |
1210 | pid_t |
1211 | waitpid (pid_t pid, int *status, int options) | |
6cdfb6e6 RS |
1212 | { |
1213 | DWORD active, retval; | |
1214 | int nh; | |
1215 | child_process *cp, *cps[MAX_CHILDREN]; | |
1216 | HANDLE wait_hnd[MAX_CHILDREN]; | |
22bae83f EZ |
1217 | DWORD timeout_ms; |
1218 | int dont_wait = (options & WNOHANG) != 0; | |
177c0ea7 | 1219 | |
6cdfb6e6 | 1220 | nh = 0; |
22bae83f EZ |
1221 | /* According to Posix: |
1222 | ||
1223 | PID = -1 means status is requested for any child process. | |
1224 | ||
1225 | PID > 0 means status is requested for a single child process | |
1226 | whose pid is PID. | |
1227 | ||
1228 | PID = 0 means status is requested for any child process whose | |
1229 | process group ID is equal to that of the calling process. But | |
1230 | since Windows has only a limited support for process groups (only | |
1231 | for console processes and only for the purposes of passing | |
1232 | Ctrl-BREAK signal to them), and since we have no documented way | |
1233 | of determining whether a given process belongs to our group, we | |
1234 | treat 0 as -1. | |
1235 | ||
1236 | PID < -1 means status is requested for any child process whose | |
1237 | process group ID is equal to the absolute value of PID. Again, | |
1238 | since we don't support process groups, we treat that as -1. */ | |
1239 | if (pid > 0) | |
6cdfb6e6 | 1240 | { |
22bae83f EZ |
1241 | int our_child = 0; |
1242 | ||
1243 | /* We are requested to wait for a specific child. */ | |
1244 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) | |
1245 | { | |
1246 | /* Some child_procs might be sockets; ignore them. Also | |
1247 | ignore subprocesses whose output is not yet completely | |
1248 | read. */ | |
1249 | if (CHILD_ACTIVE (cp) | |
1250 | && cp->procinfo.hProcess | |
1251 | && cp->pid == pid) | |
1252 | { | |
1253 | our_child = 1; | |
1254 | break; | |
1255 | } | |
1256 | } | |
1257 | if (our_child) | |
1258 | { | |
1259 | if (cp->fd < 0 || (fd_info[cp->fd].flags & FILE_AT_EOF) != 0) | |
1260 | { | |
1261 | wait_hnd[nh] = cp->procinfo.hProcess; | |
1262 | cps[nh] = cp; | |
1263 | nh++; | |
1264 | } | |
1265 | else if (dont_wait) | |
1266 | { | |
1267 | /* PID specifies our subprocess, but its status is not | |
1268 | yet available. */ | |
1269 | return 0; | |
1270 | } | |
1271 | } | |
1272 | if (nh == 0) | |
1273 | { | |
1274 | /* No such child process, or nothing to wait for, so fail. */ | |
1275 | errno = ECHILD; | |
1276 | return -1; | |
1277 | } | |
6cdfb6e6 RS |
1278 | } |
1279 | else | |
1280 | { | |
9d4f32e8 | 1281 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
22bae83f EZ |
1282 | { |
1283 | if (CHILD_ACTIVE (cp) | |
1284 | && cp->procinfo.hProcess | |
1285 | && (cp->fd < 0 || (fd_info[cp->fd].flags & FILE_AT_EOF) != 0)) | |
1286 | { | |
1287 | wait_hnd[nh] = cp->procinfo.hProcess; | |
1288 | cps[nh] = cp; | |
1289 | nh++; | |
1290 | } | |
1291 | } | |
1292 | if (nh == 0) | |
1293 | { | |
1294 | /* Nothing to wait on, so fail. */ | |
1295 | errno = ECHILD; | |
1296 | return -1; | |
1297 | } | |
6cdfb6e6 | 1298 | } |
177c0ea7 | 1299 | |
22bae83f EZ |
1300 | if (dont_wait) |
1301 | timeout_ms = 0; | |
1302 | else | |
1303 | timeout_ms = 1000; /* check for quit about once a second. */ | |
b2fc9f3d GV |
1304 | |
1305 | do | |
1306 | { | |
b2fc9f3d | 1307 | QUIT; |
22bae83f | 1308 | active = WaitForMultipleObjects (nh, wait_hnd, FALSE, timeout_ms); |
e86f5134 | 1309 | } while (active == WAIT_TIMEOUT && !dont_wait); |
b2fc9f3d | 1310 | |
6cdfb6e6 RS |
1311 | if (active == WAIT_FAILED) |
1312 | { | |
1313 | errno = EBADF; | |
1314 | return -1; | |
1315 | } | |
e86f5134 EZ |
1316 | else if (active == WAIT_TIMEOUT && dont_wait) |
1317 | { | |
1318 | /* PID specifies our subprocess, but it didn't exit yet, so its | |
1319 | status is not yet available. */ | |
1320 | #ifdef FULL_DEBUG | |
1321 | DebPrint (("Wait: PID %d not reap yet\n", cp->pid)); | |
1322 | #endif | |
1323 | return 0; | |
1324 | } | |
b2fc9f3d GV |
1325 | else if (active >= WAIT_OBJECT_0 |
1326 | && active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS) | |
6cdfb6e6 RS |
1327 | { |
1328 | active -= WAIT_OBJECT_0; | |
1329 | } | |
b2fc9f3d GV |
1330 | else if (active >= WAIT_ABANDONED_0 |
1331 | && active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS) | |
6cdfb6e6 RS |
1332 | { |
1333 | active -= WAIT_ABANDONED_0; | |
1334 | } | |
b2fc9f3d | 1335 | else |
1088b922 | 1336 | emacs_abort (); |
b2fc9f3d | 1337 | |
6cdfb6e6 RS |
1338 | if (!GetExitCodeProcess (wait_hnd[active], &retval)) |
1339 | { | |
1340 | DebPrint (("Wait.GetExitCodeProcess failed with %lu\n", | |
1341 | GetLastError ())); | |
1342 | retval = 1; | |
1343 | } | |
1344 | if (retval == STILL_ACTIVE) | |
1345 | { | |
22bae83f | 1346 | /* Should never happen. */ |
6cdfb6e6 | 1347 | DebPrint (("Wait.WaitForMultipleObjects returned an active process\n")); |
22bae83f EZ |
1348 | if (pid > 0 && dont_wait) |
1349 | return 0; | |
6cdfb6e6 RS |
1350 | errno = EINVAL; |
1351 | return -1; | |
1352 | } | |
bc69349b RS |
1353 | |
1354 | /* Massage the exit code from the process to match the format expected | |
8e6208c5 | 1355 | by the WIFSTOPPED et al macros in syswait.h. Only WIFSIGNALED and |
bc69349b RS |
1356 | WIFEXITED are supported; WIFSTOPPED doesn't make sense under NT. */ |
1357 | ||
1358 | if (retval == STATUS_CONTROL_C_EXIT) | |
1359 | retval = SIGINT; | |
1360 | else | |
1361 | retval <<= 8; | |
177c0ea7 | 1362 | |
22bae83f EZ |
1363 | if (pid > 0 && active != 0) |
1364 | emacs_abort (); | |
6cdfb6e6 | 1365 | cp = cps[active]; |
c519b5e1 GV |
1366 | pid = cp->pid; |
1367 | #ifdef FULL_DEBUG | |
1368 | DebPrint (("Wait signaled with process pid %d\n", cp->pid)); | |
1369 | #endif | |
22759c72 | 1370 | |
6cdfb6e6 | 1371 | if (status) |
bb5f74ee | 1372 | *status = retval; |
b2fc9f3d | 1373 | reap_subprocess (cp); |
177c0ea7 | 1374 | |
c519b5e1 | 1375 | return pid; |
6cdfb6e6 RS |
1376 | } |
1377 | ||
75be5258 EZ |
1378 | /* Old versions of w32api headers don't have separate 32-bit and |
1379 | 64-bit defines, but the one they have matches the 32-bit variety. */ | |
1380 | #ifndef IMAGE_NT_OPTIONAL_HDR32_MAGIC | |
1381 | # define IMAGE_NT_OPTIONAL_HDR32_MAGIC IMAGE_NT_OPTIONAL_HDR_MAGIC | |
1382 | # define IMAGE_OPTIONAL_HEADER32 IMAGE_OPTIONAL_HEADER | |
1383 | #endif | |
1384 | ||
17788cb3 EZ |
1385 | /* Implementation note: This function works with file names encoded in |
1386 | the current ANSI codepage. */ | |
24f981c9 | 1387 | static void |
b56ceb92 JB |
1388 | w32_executable_type (char * filename, |
1389 | int * is_dos_app, | |
1390 | int * is_cygnus_app, | |
1391 | int * is_gui_app) | |
817abdf6 | 1392 | { |
b2fc9f3d GV |
1393 | file_data executable; |
1394 | char * p; | |
177c0ea7 | 1395 | |
b2fc9f3d GV |
1396 | /* Default values in case we can't tell for sure. */ |
1397 | *is_dos_app = FALSE; | |
1398 | *is_cygnus_app = FALSE; | |
a55a5f3c | 1399 | *is_gui_app = FALSE; |
b2fc9f3d GV |
1400 | |
1401 | if (!open_input_file (&executable, filename)) | |
1402 | return; | |
817abdf6 | 1403 | |
b2fc9f3d | 1404 | p = strrchr (filename, '.'); |
177c0ea7 | 1405 | |
b2fc9f3d | 1406 | /* We can only identify DOS .com programs from the extension. */ |
05131107 | 1407 | if (p && xstrcasecmp (p, ".com") == 0) |
b2fc9f3d | 1408 | *is_dos_app = TRUE; |
05131107 JR |
1409 | else if (p && (xstrcasecmp (p, ".bat") == 0 |
1410 | || xstrcasecmp (p, ".cmd") == 0)) | |
b2fc9f3d GV |
1411 | { |
1412 | /* A DOS shell script - it appears that CreateProcess is happy to | |
1413 | accept this (somewhat surprisingly); presumably it looks at | |
1414 | COMSPEC to determine what executable to actually invoke. | |
1415 | Therefore, we have to do the same here as well. */ | |
1416 | /* Actually, I think it uses the program association for that | |
1417 | extension, which is defined in the registry. */ | |
1418 | p = egetenv ("COMSPEC"); | |
1419 | if (p) | |
a55a5f3c | 1420 | w32_executable_type (p, is_dos_app, is_cygnus_app, is_gui_app); |
b2fc9f3d GV |
1421 | } |
1422 | else | |
817abdf6 | 1423 | { |
b2fc9f3d GV |
1424 | /* Look for DOS .exe signature - if found, we must also check that |
1425 | it isn't really a 16- or 32-bit Windows exe, since both formats | |
1426 | start with a DOS program stub. Note that 16-bit Windows | |
1427 | executables use the OS/2 1.x format. */ | |
817abdf6 | 1428 | |
b2fc9f3d GV |
1429 | IMAGE_DOS_HEADER * dos_header; |
1430 | IMAGE_NT_HEADERS * nt_header; | |
1431 | ||
1432 | dos_header = (PIMAGE_DOS_HEADER) executable.file_base; | |
1433 | if (dos_header->e_magic != IMAGE_DOS_SIGNATURE) | |
1434 | goto unwind; | |
1435 | ||
62aba0d4 | 1436 | nt_header = (PIMAGE_NT_HEADERS) ((unsigned char *) dos_header + dos_header->e_lfanew); |
b2fc9f3d | 1437 | |
177c0ea7 | 1438 | if ((char *) nt_header > (char *) dos_header + executable.size) |
817abdf6 | 1439 | { |
b2fc9f3d GV |
1440 | /* Some dos headers (pkunzip) have bogus e_lfanew fields. */ |
1441 | *is_dos_app = TRUE; | |
177c0ea7 | 1442 | } |
b2fc9f3d GV |
1443 | else if (nt_header->Signature != IMAGE_NT_SIGNATURE |
1444 | && LOWORD (nt_header->Signature) != IMAGE_OS2_SIGNATURE) | |
1445 | { | |
1446 | *is_dos_app = TRUE; | |
1447 | } | |
1448 | else if (nt_header->Signature == IMAGE_NT_SIGNATURE) | |
1449 | { | |
2b6e2f4d JR |
1450 | IMAGE_DATA_DIRECTORY *data_dir = NULL; |
1451 | if (nt_header->OptionalHeader.Magic == IMAGE_NT_OPTIONAL_HDR32_MAGIC) | |
1452 | { | |
1453 | /* Ensure we are using the 32 bit structure. */ | |
1454 | IMAGE_OPTIONAL_HEADER32 *opt | |
1455 | = (IMAGE_OPTIONAL_HEADER32*) &(nt_header->OptionalHeader); | |
1456 | data_dir = opt->DataDirectory; | |
1457 | *is_gui_app = (opt->Subsystem == IMAGE_SUBSYSTEM_WINDOWS_GUI); | |
1458 | } | |
1459 | /* MingW 3.12 has the required 64 bit structs, but in case older | |
1460 | versions don't, only check 64 bit exes if we know how. */ | |
1461 | #ifdef IMAGE_NT_OPTIONAL_HDR64_MAGIC | |
1462 | else if (nt_header->OptionalHeader.Magic | |
1463 | == IMAGE_NT_OPTIONAL_HDR64_MAGIC) | |
1464 | { | |
1465 | IMAGE_OPTIONAL_HEADER64 *opt | |
1466 | = (IMAGE_OPTIONAL_HEADER64*) &(nt_header->OptionalHeader); | |
1467 | data_dir = opt->DataDirectory; | |
1468 | *is_gui_app = (opt->Subsystem == IMAGE_SUBSYSTEM_WINDOWS_GUI); | |
1469 | } | |
1470 | #endif | |
1471 | if (data_dir) | |
1472 | { | |
1473 | /* Look for cygwin.dll in DLL import list. */ | |
1474 | IMAGE_DATA_DIRECTORY import_dir = | |
1475 | data_dir[IMAGE_DIRECTORY_ENTRY_IMPORT]; | |
1476 | IMAGE_IMPORT_DESCRIPTOR * imports; | |
1477 | IMAGE_SECTION_HEADER * section; | |
1478 | ||
1479 | section = rva_to_section (import_dir.VirtualAddress, nt_header); | |
1480 | imports = RVA_TO_PTR (import_dir.VirtualAddress, section, | |
1481 | executable); | |
1482 | ||
1483 | for ( ; imports->Name; imports++) | |
1484 | { | |
1485 | char * dllname = RVA_TO_PTR (imports->Name, section, | |
1486 | executable); | |
35f36d65 | 1487 | |
2b6e2f4d JR |
1488 | /* The exact name of the cygwin dll has changed with |
1489 | various releases, but hopefully this will be reasonably | |
1490 | future proof. */ | |
1491 | if (strncmp (dllname, "cygwin", 6) == 0) | |
1492 | { | |
1493 | *is_cygnus_app = TRUE; | |
1494 | break; | |
1495 | } | |
1496 | } | |
1497 | } | |
b2fc9f3d | 1498 | } |
817abdf6 | 1499 | } |
177c0ea7 | 1500 | |
b2fc9f3d GV |
1501 | unwind: |
1502 | close_file_data (&executable); | |
817abdf6 KH |
1503 | } |
1504 | ||
24f981c9 | 1505 | static int |
42c95ffb | 1506 | compare_env (const void *strp1, const void *strp2) |
d9709fde | 1507 | { |
42c95ffb | 1508 | const char *str1 = *(const char **)strp1, *str2 = *(const char **)strp2; |
d9709fde GV |
1509 | |
1510 | while (*str1 && *str2 && *str1 != '=' && *str2 != '=') | |
1511 | { | |
11c22fff AI |
1512 | /* Sort order in command.com/cmd.exe is based on uppercasing |
1513 | names, so do the same here. */ | |
1514 | if (toupper (*str1) > toupper (*str2)) | |
d9709fde | 1515 | return 1; |
11c22fff | 1516 | else if (toupper (*str1) < toupper (*str2)) |
d9709fde GV |
1517 | return -1; |
1518 | str1++, str2++; | |
1519 | } | |
1520 | ||
1521 | if (*str1 == '=' && *str2 == '=') | |
1522 | return 0; | |
1523 | else if (*str1 == '=') | |
1524 | return -1; | |
1525 | else | |
1526 | return 1; | |
1527 | } | |
1528 | ||
24f981c9 | 1529 | static void |
d9709fde GV |
1530 | merge_and_sort_env (char **envp1, char **envp2, char **new_envp) |
1531 | { | |
1532 | char **optr, **nptr; | |
1533 | int num; | |
1534 | ||
1535 | nptr = new_envp; | |
1536 | optr = envp1; | |
1537 | while (*optr) | |
1538 | *nptr++ = *optr++; | |
1539 | num = optr - envp1; | |
1540 | ||
1541 | optr = envp2; | |
1542 | while (*optr) | |
1543 | *nptr++ = *optr++; | |
1544 | num += optr - envp2; | |
1545 | ||
1546 | qsort (new_envp, num, sizeof (char *), compare_env); | |
1547 | ||
1548 | *nptr = NULL; | |
1549 | } | |
6cdfb6e6 RS |
1550 | |
1551 | /* When a new child process is created we need to register it in our list, | |
1552 | so intercept spawn requests. */ | |
177c0ea7 | 1553 | int |
c519b5e1 | 1554 | sys_spawnve (int mode, char *cmdname, char **argv, char **envp) |
6cdfb6e6 | 1555 | { |
0a4de642 | 1556 | Lisp_Object program, full; |
6cdfb6e6 | 1557 | char *cmdline, *env, *parg, **targ; |
d9709fde | 1558 | int arglen, numenv; |
b0728617 | 1559 | pid_t pid; |
c519b5e1 | 1560 | child_process *cp; |
a55a5f3c | 1561 | int is_dos_app, is_cygnus_app, is_gui_app; |
b2fc9f3d | 1562 | int do_quoting = 0; |
d9709fde GV |
1563 | /* We pass our process ID to our children by setting up an environment |
1564 | variable in their environment. */ | |
1565 | char ppid_env_var_buffer[64]; | |
1566 | char *extra_env[] = {ppid_env_var_buffer, NULL}; | |
0a7a6051 JR |
1567 | /* These are the characters that cause an argument to need quoting. |
1568 | Arguments with whitespace characters need quoting to prevent the | |
1569 | argument being split into two or more. Arguments with wildcards | |
1570 | are also quoted, for consistency with posix platforms, where wildcards | |
1571 | are not expanded if we run the program directly without a shell. | |
1572 | Some extra whitespace characters need quoting in Cygwin programs, | |
1573 | so this list is conditionally modified below. */ | |
1574 | char *sepchars = " \t*?"; | |
18a80473 EZ |
1575 | /* This is for native w32 apps; modified below for Cygwin apps. */ |
1576 | char escape_char = '\\'; | |
17788cb3 | 1577 | char cmdname_a[MAX_PATH]; |
d9709fde | 1578 | |
c519b5e1 GV |
1579 | /* We don't care about the other modes */ |
1580 | if (mode != _P_NOWAIT) | |
1581 | { | |
1582 | errno = EINVAL; | |
1583 | return -1; | |
1584 | } | |
0a4de642 | 1585 | |
17788cb3 EZ |
1586 | /* Handle executable names without an executable suffix. The caller |
1587 | already searched exec-path and verified the file is executable, | |
1588 | but start-process doesn't do that for file names that are already | |
1589 | absolute. So we double-check this here, just in case. */ | |
1590 | if (faccessat (AT_FDCWD, cmdname, X_OK, AT_EACCESS) != 0) | |
0a4de642 RS |
1591 | { |
1592 | struct gcpro gcpro1; | |
177c0ea7 | 1593 | |
17788cb3 | 1594 | program = build_string (cmdname); |
0a4de642 RS |
1595 | full = Qnil; |
1596 | GCPRO1 (program); | |
1f41ee56 | 1597 | openp (Vexec_path, program, Vexec_suffixes, &full, make_number (X_OK), 0); |
0a4de642 RS |
1598 | UNGCPRO; |
1599 | if (NILP (full)) | |
1600 | { | |
1601 | errno = EINVAL; | |
1602 | return -1; | |
1603 | } | |
17788cb3 EZ |
1604 | program = ENCODE_FILE (full); |
1605 | cmdname = SDATA (program); | |
0a4de642 RS |
1606 | } |
1607 | ||
b2fc9f3d | 1608 | /* make sure argv[0] and cmdname are both in DOS format */ |
c519b5e1 | 1609 | unixtodos_filename (cmdname); |
17788cb3 EZ |
1610 | /* argv[0] was encoded by caller using ENCODE_FILE, so it is in |
1611 | UTF-8. All the other arguments are encoded by ENCODE_SYSTEM or | |
1612 | some such, and are in some ANSI codepage. We need to have | |
1613 | argv[0] encoded in ANSI codepage. */ | |
1614 | filename_to_ansi (cmdname, cmdname_a); | |
1615 | /* We explicitly require that the command's file name be encodable | |
1616 | in the current ANSI codepage, because we will be invoking it via | |
1617 | the ANSI APIs. */ | |
1618 | if (_mbspbrk (cmdname_a, "?")) | |
1619 | { | |
1620 | errno = ENOENT; | |
1621 | return -1; | |
1622 | } | |
1623 | /* From here on, CMDNAME is an ANSI-encoded string. */ | |
94ae1542 | 1624 | cmdname = cmdname_a; |
c519b5e1 | 1625 | argv[0] = cmdname; |
817abdf6 | 1626 | |
b46a6a83 | 1627 | /* Determine whether program is a 16-bit DOS executable, or a 32-bit Windows |
b2fc9f3d GV |
1628 | executable that is implicitly linked to the Cygnus dll (implying it |
1629 | was compiled with the Cygnus GNU toolchain and hence relies on | |
1630 | cygwin.dll to parse the command line - we use this to decide how to | |
a55a5f3c AI |
1631 | escape quote chars in command line args that must be quoted). |
1632 | ||
1633 | Also determine whether it is a GUI app, so that we don't hide its | |
1634 | initial window unless specifically requested. */ | |
1635 | w32_executable_type (cmdname, &is_dos_app, &is_cygnus_app, &is_gui_app); | |
b2fc9f3d GV |
1636 | |
1637 | /* On Windows 95, if cmdname is a DOS app, we invoke a helper | |
1638 | application to start it by specifying the helper app as cmdname, | |
1639 | while leaving the real app name as argv[0]. */ | |
1640 | if (is_dos_app) | |
817abdf6 | 1641 | { |
17788cb3 EZ |
1642 | char *p; |
1643 | ||
1644 | cmdname = alloca (MAX_PATH); | |
b2fc9f3d GV |
1645 | if (egetenv ("CMDPROXY")) |
1646 | strcpy (cmdname, egetenv ("CMDPROXY")); | |
1647 | else | |
1648 | { | |
d5db4077 | 1649 | strcpy (cmdname, SDATA (Vinvocation_directory)); |
b2fc9f3d GV |
1650 | strcat (cmdname, "cmdproxy.exe"); |
1651 | } | |
17788cb3 EZ |
1652 | |
1653 | /* Can't use unixtodos_filename here, since that needs its file | |
1654 | name argument encoded in UTF-8. */ | |
1655 | for (p = cmdname; *p; p = CharNextA (p)) | |
1656 | if (*p == '/') | |
1657 | *p = '\\'; | |
817abdf6 | 1658 | } |
177c0ea7 | 1659 | |
6cdfb6e6 RS |
1660 | /* we have to do some conjuring here to put argv and envp into the |
1661 | form CreateProcess wants... argv needs to be a space separated/null | |
1662 | terminated list of parameters, and envp is a null | |
1663 | separated/double-null terminated list of parameters. | |
c519b5e1 | 1664 | |
b2fc9f3d GV |
1665 | Additionally, zero-length args and args containing whitespace or |
1666 | quote chars need to be wrapped in double quotes - for this to work, | |
1667 | embedded quotes need to be escaped as well. The aim is to ensure | |
1668 | the child process reconstructs the argv array we start with | |
1669 | exactly, so we treat quotes at the beginning and end of arguments | |
1670 | as embedded quotes. | |
1671 | ||
ef79fbba | 1672 | The w32 GNU-based library from Cygnus doubles quotes to escape |
b2fc9f3d | 1673 | them, while MSVC uses backslash for escaping. (Actually the MSVC |
e1dbe924 | 1674 | startup code does attempt to recognize doubled quotes and accept |
b2fc9f3d GV |
1675 | them, but gets it wrong and ends up requiring three quotes to get a |
1676 | single embedded quote!) So by default we decide whether to use | |
1677 | quote or backslash as the escape character based on whether the | |
1678 | binary is apparently a Cygnus compiled app. | |
1679 | ||
1680 | Note that using backslash to escape embedded quotes requires | |
1681 | additional special handling if an embedded quote is already | |
97610156 | 1682 | preceded by backslash, or if an arg requiring quoting ends with |
b2fc9f3d GV |
1683 | backslash. In such cases, the run of escape characters needs to be |
1684 | doubled. For consistency, we apply this special handling as long | |
1685 | as the escape character is not quote. | |
1686 | ||
1687 | Since we have no idea how large argv and envp are likely to be we | |
1688 | figure out list lengths on the fly and allocate them. */ | |
1689 | ||
1690 | if (!NILP (Vw32_quote_process_args)) | |
1691 | { | |
1692 | do_quoting = 1; | |
1693 | /* Override escape char by binding w32-quote-process-args to | |
1694 | desired character, or use t for auto-selection. */ | |
1695 | if (INTEGERP (Vw32_quote_process_args)) | |
1696 | escape_char = XINT (Vw32_quote_process_args); | |
1697 | else | |
1698 | escape_char = is_cygnus_app ? '"' : '\\'; | |
1699 | } | |
177c0ea7 | 1700 | |
9d4f32e8 | 1701 | /* Cygwin apps needs quoting a bit more often. */ |
dbb70029 GM |
1702 | if (escape_char == '"') |
1703 | sepchars = "\r\n\t\f '"; | |
1704 | ||
6cdfb6e6 RS |
1705 | /* do argv... */ |
1706 | arglen = 0; | |
1707 | targ = argv; | |
1708 | while (*targ) | |
1709 | { | |
c519b5e1 | 1710 | char * p = *targ; |
b2fc9f3d GV |
1711 | int need_quotes = 0; |
1712 | int escape_char_run = 0; | |
c519b5e1 GV |
1713 | |
1714 | if (*p == 0) | |
b2fc9f3d GV |
1715 | need_quotes = 1; |
1716 | for ( ; *p; p++) | |
1717 | { | |
dbb70029 GM |
1718 | if (escape_char == '"' && *p == '\\') |
1719 | /* If it's a Cygwin app, \ needs to be escaped. */ | |
1720 | arglen++; | |
1721 | else if (*p == '"') | |
b2fc9f3d GV |
1722 | { |
1723 | /* allow for embedded quotes to be escaped */ | |
1724 | arglen++; | |
1725 | need_quotes = 1; | |
1726 | /* handle the case where the embedded quote is already escaped */ | |
1727 | if (escape_char_run > 0) | |
1728 | { | |
1729 | /* To preserve the arg exactly, we need to double the | |
1730 | preceding escape characters (plus adding one to | |
1731 | escape the quote character itself). */ | |
1732 | arglen += escape_char_run; | |
1733 | } | |
1734 | } | |
dbb70029 | 1735 | else if (strchr (sepchars, *p) != NULL) |
b2fc9f3d GV |
1736 | { |
1737 | need_quotes = 1; | |
1738 | } | |
1739 | ||
1740 | if (*p == escape_char && escape_char != '"') | |
1741 | escape_char_run++; | |
1742 | else | |
1743 | escape_char_run = 0; | |
1744 | } | |
1745 | if (need_quotes) | |
1746 | { | |
1747 | arglen += 2; | |
1748 | /* handle the case where the arg ends with an escape char - we | |
1749 | must not let the enclosing quote be escaped. */ | |
1750 | if (escape_char_run > 0) | |
1751 | arglen += escape_char_run; | |
1752 | } | |
6cdfb6e6 RS |
1753 | arglen += strlen (*targ++) + 1; |
1754 | } | |
c519b5e1 | 1755 | cmdline = alloca (arglen); |
6cdfb6e6 RS |
1756 | targ = argv; |
1757 | parg = cmdline; | |
1758 | while (*targ) | |
1759 | { | |
c519b5e1 | 1760 | char * p = *targ; |
b2fc9f3d | 1761 | int need_quotes = 0; |
c519b5e1 GV |
1762 | |
1763 | if (*p == 0) | |
b2fc9f3d | 1764 | need_quotes = 1; |
93fdf2f8 | 1765 | |
b2fc9f3d | 1766 | if (do_quoting) |
93fdf2f8 | 1767 | { |
93fdf2f8 | 1768 | for ( ; *p; p++) |
dbb70029 | 1769 | if ((strchr (sepchars, *p) != NULL) || *p == '"') |
b2fc9f3d | 1770 | need_quotes = 1; |
93fdf2f8 | 1771 | } |
b2fc9f3d | 1772 | if (need_quotes) |
c519b5e1 | 1773 | { |
b2fc9f3d | 1774 | int escape_char_run = 0; |
c519b5e1 GV |
1775 | char * first; |
1776 | char * last; | |
1777 | ||
1778 | p = *targ; | |
1779 | first = p; | |
1780 | last = p + strlen (p) - 1; | |
1781 | *parg++ = '"'; | |
b2fc9f3d GV |
1782 | #if 0 |
1783 | /* This version does not escape quotes if they occur at the | |
1784 | beginning or end of the arg - this could lead to incorrect | |
fffa137c | 1785 | behavior when the arg itself represents a command line |
b2fc9f3d GV |
1786 | containing quoted args. I believe this was originally done |
1787 | as a hack to make some things work, before | |
1788 | `w32-quote-process-args' was added. */ | |
c519b5e1 GV |
1789 | while (*p) |
1790 | { | |
1791 | if (*p == '"' && p > first && p < last) | |
b2fc9f3d | 1792 | *parg++ = escape_char; /* escape embedded quotes */ |
c519b5e1 GV |
1793 | *parg++ = *p++; |
1794 | } | |
b2fc9f3d GV |
1795 | #else |
1796 | for ( ; *p; p++) | |
1797 | { | |
1798 | if (*p == '"') | |
1799 | { | |
1800 | /* double preceding escape chars if any */ | |
1801 | while (escape_char_run > 0) | |
1802 | { | |
1803 | *parg++ = escape_char; | |
1804 | escape_char_run--; | |
1805 | } | |
1806 | /* escape all quote chars, even at beginning or end */ | |
1807 | *parg++ = escape_char; | |
1808 | } | |
dbb70029 GM |
1809 | else if (escape_char == '"' && *p == '\\') |
1810 | *parg++ = '\\'; | |
b2fc9f3d GV |
1811 | *parg++ = *p; |
1812 | ||
1813 | if (*p == escape_char && escape_char != '"') | |
1814 | escape_char_run++; | |
1815 | else | |
1816 | escape_char_run = 0; | |
1817 | } | |
1818 | /* double escape chars before enclosing quote */ | |
1819 | while (escape_char_run > 0) | |
1820 | { | |
1821 | *parg++ = escape_char; | |
1822 | escape_char_run--; | |
1823 | } | |
1824 | #endif | |
c519b5e1 GV |
1825 | *parg++ = '"'; |
1826 | } | |
1827 | else | |
1828 | { | |
1829 | strcpy (parg, *targ); | |
1830 | parg += strlen (*targ); | |
1831 | } | |
6cdfb6e6 | 1832 | *parg++ = ' '; |
c519b5e1 | 1833 | targ++; |
6cdfb6e6 RS |
1834 | } |
1835 | *--parg = '\0'; | |
177c0ea7 | 1836 | |
6cdfb6e6 RS |
1837 | /* and envp... */ |
1838 | arglen = 1; | |
1839 | targ = envp; | |
d9709fde | 1840 | numenv = 1; /* for end null */ |
6cdfb6e6 RS |
1841 | while (*targ) |
1842 | { | |
1843 | arglen += strlen (*targ++) + 1; | |
d9709fde | 1844 | numenv++; |
6cdfb6e6 | 1845 | } |
d9709fde | 1846 | /* extra env vars... */ |
2f246cd3 | 1847 | sprintf (ppid_env_var_buffer, "EM_PARENT_PROCESS_ID=%lu", |
6cdfb6e6 RS |
1848 | GetCurrentProcessId ()); |
1849 | arglen += strlen (ppid_env_var_buffer) + 1; | |
d9709fde | 1850 | numenv++; |
6cdfb6e6 | 1851 | |
d9709fde GV |
1852 | /* merge env passed in and extra env into one, and sort it. */ |
1853 | targ = (char **) alloca (numenv * sizeof (char *)); | |
1854 | merge_and_sort_env (envp, extra_env, targ); | |
1855 | ||
1856 | /* concatenate env entries. */ | |
c519b5e1 | 1857 | env = alloca (arglen); |
6cdfb6e6 RS |
1858 | parg = env; |
1859 | while (*targ) | |
1860 | { | |
1861 | strcpy (parg, *targ); | |
1862 | parg += strlen (*targ++); | |
1863 | *parg++ = '\0'; | |
1864 | } | |
6cdfb6e6 RS |
1865 | *parg++ = '\0'; |
1866 | *parg = '\0'; | |
c519b5e1 GV |
1867 | |
1868 | cp = new_child (); | |
1869 | if (cp == NULL) | |
1870 | { | |
1871 | errno = EAGAIN; | |
1872 | return -1; | |
1873 | } | |
177c0ea7 | 1874 | |
6cdfb6e6 | 1875 | /* Now create the process. */ |
a55a5f3c | 1876 | if (!create_child (cmdname, cmdline, env, is_gui_app, &pid, cp)) |
6cdfb6e6 | 1877 | { |
c519b5e1 | 1878 | delete_child (cp); |
6cdfb6e6 | 1879 | errno = ENOEXEC; |
c519b5e1 | 1880 | return -1; |
6cdfb6e6 | 1881 | } |
177c0ea7 | 1882 | |
c519b5e1 | 1883 | return pid; |
6cdfb6e6 RS |
1884 | } |
1885 | ||
1886 | /* Emulate the select call | |
1887 | Wait for available input on any of the given rfds, or timeout if | |
1888 | a timeout is given and no input is detected | |
b2fc9f3d GV |
1889 | wfds and efds are not supported and must be NULL. |
1890 | ||
1891 | For simplicity, we detect the death of child processes here and | |
1892 | synchronously call the SIGCHLD handler. Since it is possible for | |
1893 | children to be created without a corresponding pipe handle from which | |
1894 | to read output, we wait separately on the process handles as well as | |
1895 | the char_avail events for each process pipe. We only call | |
86143765 RS |
1896 | wait/reap_process when the process actually terminates. |
1897 | ||
1898 | To reduce the number of places in which Emacs can be hung such that | |
1899 | C-g is not able to interrupt it, we always wait on interrupt_handle | |
04bf5b65 | 1900 | (which is signaled by the input thread when C-g is detected). If we |
86143765 RS |
1901 | detect that we were woken up by C-g, we return -1 with errno set to |
1902 | EINTR as on Unix. */ | |
6cdfb6e6 | 1903 | |
7684e57b | 1904 | /* From w32console.c */ |
6cdfb6e6 | 1905 | extern HANDLE keyboard_handle; |
86143765 RS |
1906 | |
1907 | /* From w32xfns.c */ | |
1908 | extern HANDLE interrupt_handle; | |
1909 | ||
6cdfb6e6 RS |
1910 | /* From process.c */ |
1911 | extern int proc_buffered_char[]; | |
1912 | ||
177c0ea7 | 1913 | int |
22759c72 | 1914 | sys_select (int nfds, SELECT_TYPE *rfds, SELECT_TYPE *wfds, SELECT_TYPE *efds, |
43aac990 | 1915 | struct timespec *timeout, void *ignored) |
6cdfb6e6 RS |
1916 | { |
1917 | SELECT_TYPE orfds; | |
b2fc9f3d GV |
1918 | DWORD timeout_ms, start_time; |
1919 | int i, nh, nc, nr; | |
6cdfb6e6 | 1920 | DWORD active; |
b2fc9f3d GV |
1921 | child_process *cp, *cps[MAX_CHILDREN]; |
1922 | HANDLE wait_hnd[MAXDESC + MAX_CHILDREN]; | |
c519b5e1 | 1923 | int fdindex[MAXDESC]; /* mapping from wait handles back to descriptors */ |
177c0ea7 | 1924 | |
388cdec0 EZ |
1925 | timeout_ms = |
1926 | timeout ? (timeout->tv_sec * 1000 + timeout->tv_nsec / 1000000) : INFINITE; | |
b2fc9f3d | 1927 | |
6cdfb6e6 | 1928 | /* If the descriptor sets are NULL but timeout isn't, then just Sleep. */ |
177c0ea7 | 1929 | if (rfds == NULL && wfds == NULL && efds == NULL && timeout != NULL) |
6cdfb6e6 | 1930 | { |
b2fc9f3d | 1931 | Sleep (timeout_ms); |
6cdfb6e6 RS |
1932 | return 0; |
1933 | } | |
1934 | ||
1935 | /* Otherwise, we only handle rfds, so fail otherwise. */ | |
1936 | if (rfds == NULL || wfds != NULL || efds != NULL) | |
1937 | { | |
1938 | errno = EINVAL; | |
1939 | return -1; | |
1940 | } | |
177c0ea7 | 1941 | |
6cdfb6e6 RS |
1942 | orfds = *rfds; |
1943 | FD_ZERO (rfds); | |
1944 | nr = 0; | |
86143765 | 1945 | |
9c099ca7 EZ |
1946 | /* If interrupt_handle is available and valid, always wait on it, to |
1947 | detect C-g (quit). */ | |
1948 | nh = 0; | |
1949 | if (interrupt_handle && interrupt_handle != INVALID_HANDLE_VALUE) | |
1950 | { | |
1951 | wait_hnd[0] = interrupt_handle; | |
1952 | fdindex[0] = -1; | |
1953 | nh++; | |
1954 | } | |
177c0ea7 | 1955 | |
b2fc9f3d | 1956 | /* Build a list of pipe handles to wait on. */ |
6cdfb6e6 RS |
1957 | for (i = 0; i < nfds; i++) |
1958 | if (FD_ISSET (i, &orfds)) | |
1959 | { | |
1960 | if (i == 0) | |
1961 | { | |
c519b5e1 GV |
1962 | if (keyboard_handle) |
1963 | { | |
1964 | /* Handle stdin specially */ | |
1965 | wait_hnd[nh] = keyboard_handle; | |
1966 | fdindex[nh] = i; | |
1967 | nh++; | |
1968 | } | |
6cdfb6e6 RS |
1969 | |
1970 | /* Check for any emacs-generated input in the queue since | |
1971 | it won't be detected in the wait */ | |
1972 | if (detect_input_pending ()) | |
1973 | { | |
1974 | FD_SET (i, rfds); | |
c519b5e1 | 1975 | return 1; |
6cdfb6e6 | 1976 | } |
9c099ca7 EZ |
1977 | else if (noninteractive) |
1978 | { | |
1979 | if (handle_file_notifications (NULL)) | |
1980 | return 1; | |
1981 | } | |
6cdfb6e6 RS |
1982 | } |
1983 | else | |
1984 | { | |
d3d14b40 | 1985 | /* Child process and socket/comm port input. */ |
c519b5e1 | 1986 | cp = fd_info[i].cp; |
6cdfb6e6 RS |
1987 | if (cp) |
1988 | { | |
c519b5e1 GV |
1989 | int current_status = cp->status; |
1990 | ||
1991 | if (current_status == STATUS_READ_ACKNOWLEDGED) | |
1992 | { | |
1993 | /* Tell reader thread which file handle to use. */ | |
1994 | cp->fd = i; | |
1995 | /* Wake up the reader thread for this process */ | |
1996 | cp->status = STATUS_READ_READY; | |
1997 | if (!SetEvent (cp->char_consumed)) | |
d3d14b40 | 1998 | DebPrint (("sys_select.SetEvent failed with " |
c519b5e1 GV |
1999 | "%lu for fd %ld\n", GetLastError (), i)); |
2000 | } | |
2001 | ||
2002 | #ifdef CHECK_INTERLOCK | |
2003 | /* slightly crude cross-checking of interlock between threads */ | |
2004 | ||
2005 | current_status = cp->status; | |
2006 | if (WaitForSingleObject (cp->char_avail, 0) == WAIT_OBJECT_0) | |
2007 | { | |
04bf5b65 | 2008 | /* char_avail has been signaled, so status (which may |
c519b5e1 GV |
2009 | have changed) should indicate read has completed |
2010 | but has not been acknowledged. */ | |
2011 | current_status = cp->status; | |
b2fc9f3d GV |
2012 | if (current_status != STATUS_READ_SUCCEEDED |
2013 | && current_status != STATUS_READ_FAILED) | |
c519b5e1 GV |
2014 | DebPrint (("char_avail set, but read not completed: status %d\n", |
2015 | current_status)); | |
2016 | } | |
2017 | else | |
2018 | { | |
04bf5b65 | 2019 | /* char_avail has not been signaled, so status should |
c519b5e1 | 2020 | indicate that read is in progress; small possibility |
04bf5b65 | 2021 | that read has completed but event wasn't yet signaled |
c519b5e1 GV |
2022 | when we tested it (because a context switch occurred |
2023 | or if running on separate CPUs). */ | |
b2fc9f3d GV |
2024 | if (current_status != STATUS_READ_READY |
2025 | && current_status != STATUS_READ_IN_PROGRESS | |
2026 | && current_status != STATUS_READ_SUCCEEDED | |
2027 | && current_status != STATUS_READ_FAILED) | |
c519b5e1 GV |
2028 | DebPrint (("char_avail reset, but read status is bad: %d\n", |
2029 | current_status)); | |
2030 | } | |
2031 | #endif | |
2032 | wait_hnd[nh] = cp->char_avail; | |
2033 | fdindex[nh] = i; | |
1088b922 | 2034 | if (!wait_hnd[nh]) emacs_abort (); |
c519b5e1 | 2035 | nh++; |
6cdfb6e6 RS |
2036 | #ifdef FULL_DEBUG |
2037 | DebPrint (("select waiting on child %d fd %d\n", | |
2038 | cp-child_procs, i)); | |
2039 | #endif | |
6cdfb6e6 RS |
2040 | } |
2041 | else | |
2042 | { | |
c519b5e1 | 2043 | /* Unable to find something to wait on for this fd, skip */ |
ef79fbba GV |
2044 | |
2045 | /* Note that this is not a fatal error, and can in fact | |
2046 | happen in unusual circumstances. Specifically, if | |
2047 | sys_spawnve fails, eg. because the program doesn't | |
2048 | exist, and debug-on-error is t so Fsignal invokes a | |
2049 | nested input loop, then the process output pipe is | |
2050 | still included in input_wait_mask with no child_proc | |
2051 | associated with it. (It is removed when the debugger | |
2052 | exits the nested input loop and the error is thrown.) */ | |
2053 | ||
c519b5e1 | 2054 | DebPrint (("sys_select: fd %ld is invalid! ignoring\n", i)); |
6cdfb6e6 RS |
2055 | } |
2056 | } | |
2057 | } | |
b2fc9f3d GV |
2058 | |
2059 | count_children: | |
2060 | /* Add handles of child processes. */ | |
2061 | nc = 0; | |
9d4f32e8 | 2062 | for (cp = child_procs + (child_proc_count-1); cp >= child_procs; cp--) |
ef79fbba GV |
2063 | /* Some child_procs might be sockets; ignore them. Also some |
2064 | children may have died already, but we haven't finished reading | |
2065 | the process output; ignore them too. */ | |
b2af991a | 2066 | if ((CHILD_ACTIVE (cp) && cp->procinfo.hProcess) |
ef79fbba GV |
2067 | && (cp->fd < 0 |
2068 | || (fd_info[cp->fd].flags & FILE_SEND_SIGCHLD) == 0 | |
2069 | || (fd_info[cp->fd].flags & FILE_AT_EOF) != 0) | |
2070 | ) | |
b2fc9f3d GV |
2071 | { |
2072 | wait_hnd[nh + nc] = cp->procinfo.hProcess; | |
2073 | cps[nc] = cp; | |
2074 | nc++; | |
2075 | } | |
177c0ea7 | 2076 | |
6cdfb6e6 | 2077 | /* Nothing to look for, so we didn't find anything */ |
177c0ea7 | 2078 | if (nh + nc == 0) |
6cdfb6e6 | 2079 | { |
22759c72 | 2080 | if (timeout) |
b2fc9f3d | 2081 | Sleep (timeout_ms); |
9c099ca7 EZ |
2082 | if (noninteractive) |
2083 | { | |
2084 | if (handle_file_notifications (NULL)) | |
2085 | return 1; | |
2086 | } | |
6cdfb6e6 RS |
2087 | return 0; |
2088 | } | |
177c0ea7 | 2089 | |
b2fc9f3d | 2090 | start_time = GetTickCount (); |
8b031dcc | 2091 | |
04bf5b65 | 2092 | /* Wait for input or child death to be signaled. If user input is |
8b031dcc AI |
2093 | allowed, then also accept window messages. */ |
2094 | if (FD_ISSET (0, &orfds)) | |
2095 | active = MsgWaitForMultipleObjects (nh + nc, wait_hnd, FALSE, timeout_ms, | |
2096 | QS_ALLINPUT); | |
2097 | else | |
2098 | active = WaitForMultipleObjects (nh + nc, wait_hnd, FALSE, timeout_ms); | |
c519b5e1 | 2099 | |
6cdfb6e6 RS |
2100 | if (active == WAIT_FAILED) |
2101 | { | |
2102 | DebPrint (("select.WaitForMultipleObjects (%d, %lu) failed with %lu\n", | |
b2fc9f3d | 2103 | nh + nc, timeout_ms, GetLastError ())); |
d64b707c | 2104 | /* don't return EBADF - this causes wait_reading_process_output to |
c519b5e1 GV |
2105 | abort; WAIT_FAILED is returned when single-stepping under |
2106 | Windows 95 after switching thread focus in debugger, and | |
2107 | possibly at other times. */ | |
2108 | errno = EINTR; | |
6cdfb6e6 RS |
2109 | return -1; |
2110 | } | |
2111 | else if (active == WAIT_TIMEOUT) | |
2112 | { | |
9c099ca7 EZ |
2113 | if (noninteractive) |
2114 | { | |
2115 | if (handle_file_notifications (NULL)) | |
2116 | return 1; | |
2117 | } | |
6cdfb6e6 RS |
2118 | return 0; |
2119 | } | |
b2fc9f3d GV |
2120 | else if (active >= WAIT_OBJECT_0 |
2121 | && active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS) | |
6cdfb6e6 RS |
2122 | { |
2123 | active -= WAIT_OBJECT_0; | |
2124 | } | |
b2fc9f3d GV |
2125 | else if (active >= WAIT_ABANDONED_0 |
2126 | && active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS) | |
6cdfb6e6 RS |
2127 | { |
2128 | active -= WAIT_ABANDONED_0; | |
2129 | } | |
b2fc9f3d | 2130 | else |
1088b922 | 2131 | emacs_abort (); |
6cdfb6e6 | 2132 | |
c519b5e1 | 2133 | /* Loop over all handles after active (now officially documented as |
04bf5b65 | 2134 | being the first signaled handle in the array). We do this to |
c519b5e1 GV |
2135 | ensure fairness, so that all channels with data available will be |
2136 | processed - otherwise higher numbered channels could be starved. */ | |
2137 | do | |
6cdfb6e6 | 2138 | { |
8b031dcc AI |
2139 | if (active == nh + nc) |
2140 | { | |
2141 | /* There are messages in the lisp thread's queue; we must | |
2142 | drain the queue now to ensure they are processed promptly, | |
2143 | because if we don't do so, we will not be woken again until | |
2144 | further messages arrive. | |
2145 | ||
2146 | NB. If ever we allow window message procedures to callback | |
2147 | into lisp, we will need to ensure messages are dispatched | |
2148 | at a safe time for lisp code to be run (*), and we may also | |
2149 | want to provide some hooks in the dispatch loop to cater | |
2150 | for modeless dialogs created by lisp (ie. to register | |
2151 | window handles to pass to IsDialogMessage). | |
2152 | ||
2153 | (*) Note that MsgWaitForMultipleObjects above is an | |
2154 | internal dispatch point for messages that are sent to | |
2155 | windows created by this thread. */ | |
977c6479 EZ |
2156 | if (drain_message_queue () |
2157 | /* If drain_message_queue returns non-zero, that means | |
2158 | we received a WM_EMACS_FILENOTIFY message. If this | |
2159 | is a TTY frame, we must signal the caller that keyboard | |
2160 | input is available, so that w32_console_read_socket | |
2161 | will be called to pick up the notifications. If we | |
2162 | don't do that, file notifications will only work when | |
2163 | the Emacs TTY frame has focus. */ | |
2164 | && FRAME_TERMCAP_P (SELECTED_FRAME ()) | |
2165 | /* they asked for stdin reads */ | |
2166 | && FD_ISSET (0, &orfds) | |
2167 | /* the stdin handle is valid */ | |
2168 | && keyboard_handle) | |
2169 | { | |
2170 | FD_SET (0, rfds); | |
2171 | if (nr == 0) | |
2172 | nr = 1; | |
2173 | } | |
8b031dcc AI |
2174 | } |
2175 | else if (active >= nh) | |
b2fc9f3d GV |
2176 | { |
2177 | cp = cps[active - nh]; | |
ef79fbba GV |
2178 | |
2179 | /* We cannot always signal SIGCHLD immediately; if we have not | |
2180 | finished reading the process output, we must delay sending | |
2181 | SIGCHLD until we do. */ | |
2182 | ||
2183 | if (cp->fd >= 0 && (fd_info[cp->fd].flags & FILE_AT_EOF) == 0) | |
2184 | fd_info[cp->fd].flags |= FILE_SEND_SIGCHLD; | |
b2fc9f3d | 2185 | /* SIG_DFL for SIGCHLD is ignore */ |
ef79fbba GV |
2186 | else if (sig_handlers[SIGCHLD] != SIG_DFL && |
2187 | sig_handlers[SIGCHLD] != SIG_IGN) | |
b2fc9f3d GV |
2188 | { |
2189 | #ifdef FULL_DEBUG | |
2190 | DebPrint (("select calling SIGCHLD handler for pid %d\n", | |
2191 | cp->pid)); | |
2192 | #endif | |
b2fc9f3d | 2193 | sig_handlers[SIGCHLD] (SIGCHLD); |
b2fc9f3d GV |
2194 | } |
2195 | } | |
86143765 RS |
2196 | else if (fdindex[active] == -1) |
2197 | { | |
2198 | /* Quit (C-g) was detected. */ | |
2199 | errno = EINTR; | |
2200 | return -1; | |
2201 | } | |
b2fc9f3d | 2202 | else if (fdindex[active] == 0) |
c519b5e1 GV |
2203 | { |
2204 | /* Keyboard input available */ | |
2205 | FD_SET (0, rfds); | |
6cdfb6e6 | 2206 | nr++; |
c519b5e1 | 2207 | } |
6cdfb6e6 | 2208 | else |
c519b5e1 | 2209 | { |
b2fc9f3d GV |
2210 | /* must be a socket or pipe - read ahead should have |
2211 | completed, either succeeding or failing. */ | |
c519b5e1 GV |
2212 | FD_SET (fdindex[active], rfds); |
2213 | nr++; | |
c519b5e1 GV |
2214 | } |
2215 | ||
b2fc9f3d GV |
2216 | /* Even though wait_reading_process_output only reads from at most |
2217 | one channel, we must process all channels here so that we reap | |
2218 | all children that have died. */ | |
2219 | while (++active < nh + nc) | |
c519b5e1 GV |
2220 | if (WaitForSingleObject (wait_hnd[active], 0) == WAIT_OBJECT_0) |
2221 | break; | |
b2fc9f3d GV |
2222 | } while (active < nh + nc); |
2223 | ||
9c099ca7 EZ |
2224 | if (noninteractive) |
2225 | { | |
2226 | if (handle_file_notifications (NULL)) | |
2227 | nr++; | |
2228 | } | |
2229 | ||
b2fc9f3d GV |
2230 | /* If no input has arrived and timeout hasn't expired, wait again. */ |
2231 | if (nr == 0) | |
2232 | { | |
2233 | DWORD elapsed = GetTickCount () - start_time; | |
2234 | ||
2235 | if (timeout_ms > elapsed) /* INFINITE is MAX_UINT */ | |
2236 | { | |
2237 | if (timeout_ms != INFINITE) | |
2238 | timeout_ms -= elapsed; | |
2239 | goto count_children; | |
2240 | } | |
2241 | } | |
c519b5e1 | 2242 | |
6cdfb6e6 RS |
2243 | return nr; |
2244 | } | |
2245 | ||
c519b5e1 | 2246 | /* Substitute for certain kill () operations */ |
b2fc9f3d GV |
2247 | |
2248 | static BOOL CALLBACK | |
42c95ffb | 2249 | find_child_console (HWND hwnd, LPARAM arg) |
b2fc9f3d | 2250 | { |
42c95ffb | 2251 | child_process * cp = (child_process *) arg; |
b2fc9f3d GV |
2252 | DWORD thread_id; |
2253 | DWORD process_id; | |
2254 | ||
2255 | thread_id = GetWindowThreadProcessId (hwnd, &process_id); | |
2256 | if (process_id == cp->procinfo.dwProcessId) | |
2257 | { | |
2258 | char window_class[32]; | |
2259 | ||
2260 | GetClassName (hwnd, window_class, sizeof (window_class)); | |
2261 | if (strcmp (window_class, | |
417a7a0e | 2262 | (os_subtype == OS_9X) |
b2fc9f3d GV |
2263 | ? "tty" |
2264 | : "ConsoleWindowClass") == 0) | |
2265 | { | |
2266 | cp->hwnd = hwnd; | |
2267 | return FALSE; | |
2268 | } | |
2269 | } | |
2270 | /* keep looking */ | |
2271 | return TRUE; | |
2272 | } | |
2273 | ||
16b22fef | 2274 | /* Emulate 'kill', but only for other processes. */ |
177c0ea7 | 2275 | int |
b0728617 | 2276 | sys_kill (pid_t pid, int sig) |
6cdfb6e6 RS |
2277 | { |
2278 | child_process *cp; | |
c519b5e1 GV |
2279 | HANDLE proc_hand; |
2280 | int need_to_free = 0; | |
2281 | int rc = 0; | |
177c0ea7 | 2282 | |
d983a10b PE |
2283 | /* Each process is in its own process group. */ |
2284 | if (pid < 0) | |
2285 | pid = -pid; | |
2286 | ||
6cdfb6e6 | 2287 | /* Only handle signals that will result in the process dying */ |
343a2aef EZ |
2288 | if (sig != 0 |
2289 | && sig != SIGINT && sig != SIGKILL && sig != SIGQUIT && sig != SIGHUP) | |
6cdfb6e6 RS |
2290 | { |
2291 | errno = EINVAL; | |
2292 | return -1; | |
2293 | } | |
c519b5e1 | 2294 | |
343a2aef EZ |
2295 | if (sig == 0) |
2296 | { | |
2297 | /* It will take _some_ time before PID 4 or less on Windows will | |
2298 | be Emacs... */ | |
2299 | if (pid <= 4) | |
2300 | { | |
2301 | errno = EPERM; | |
2302 | return -1; | |
2303 | } | |
2304 | proc_hand = OpenProcess (PROCESS_QUERY_INFORMATION, 0, pid); | |
2305 | if (proc_hand == NULL) | |
2306 | { | |
2307 | DWORD err = GetLastError (); | |
2308 | ||
2309 | switch (err) | |
2310 | { | |
2311 | case ERROR_ACCESS_DENIED: /* existing process, but access denied */ | |
2312 | errno = EPERM; | |
2313 | return -1; | |
2314 | case ERROR_INVALID_PARAMETER: /* process PID does not exist */ | |
2315 | errno = ESRCH; | |
2316 | return -1; | |
2317 | } | |
2318 | } | |
2319 | else | |
2320 | CloseHandle (proc_hand); | |
2321 | return 0; | |
2322 | } | |
2323 | ||
6cdfb6e6 RS |
2324 | cp = find_child_pid (pid); |
2325 | if (cp == NULL) | |
2326 | { | |
16b22fef EZ |
2327 | /* We were passed a PID of something other than our subprocess. |
2328 | If that is our own PID, we will send to ourself a message to | |
2329 | close the selected frame, which does not necessarily | |
2330 | terminates Emacs. But then we are not supposed to call | |
2331 | sys_kill with our own PID. */ | |
c519b5e1 GV |
2332 | proc_hand = OpenProcess (PROCESS_TERMINATE, 0, pid); |
2333 | if (proc_hand == NULL) | |
2334 | { | |
2335 | errno = EPERM; | |
2336 | return -1; | |
2337 | } | |
2338 | need_to_free = 1; | |
2339 | } | |
2340 | else | |
2341 | { | |
2342 | proc_hand = cp->procinfo.hProcess; | |
2343 | pid = cp->procinfo.dwProcessId; | |
b2fc9f3d GV |
2344 | |
2345 | /* Try to locate console window for process. */ | |
2346 | EnumWindows (find_child_console, (LPARAM) cp); | |
6cdfb6e6 | 2347 | } |
177c0ea7 | 2348 | |
a55a5f3c | 2349 | if (sig == SIGINT || sig == SIGQUIT) |
6cdfb6e6 | 2350 | { |
b2fc9f3d GV |
2351 | if (NILP (Vw32_start_process_share_console) && cp && cp->hwnd) |
2352 | { | |
2353 | BYTE control_scan_code = (BYTE) MapVirtualKey (VK_CONTROL, 0); | |
a55a5f3c AI |
2354 | /* Fake Ctrl-C for SIGINT, and Ctrl-Break for SIGQUIT. */ |
2355 | BYTE vk_break_code = (sig == SIGINT) ? 'C' : VK_CANCEL; | |
b2fc9f3d GV |
2356 | BYTE break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0); |
2357 | HWND foreground_window; | |
2358 | ||
2359 | if (break_scan_code == 0) | |
2360 | { | |
a55a5f3c | 2361 | /* Fake Ctrl-C for SIGQUIT if we can't manage Ctrl-Break. */ |
b2fc9f3d GV |
2362 | vk_break_code = 'C'; |
2363 | break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0); | |
2364 | } | |
2365 | ||
2366 | foreground_window = GetForegroundWindow (); | |
f446016f | 2367 | if (foreground_window) |
b2fc9f3d | 2368 | { |
f446016f AI |
2369 | /* NT 5.0, and apparently also Windows 98, will not allow |
2370 | a Window to be set to foreground directly without the | |
2371 | user's involvement. The workaround is to attach | |
2372 | ourselves to the thread that owns the foreground | |
2373 | window, since that is the only thread that can set the | |
2374 | foreground window. */ | |
2375 | DWORD foreground_thread, child_thread; | |
2376 | foreground_thread = | |
2377 | GetWindowThreadProcessId (foreground_window, NULL); | |
2378 | if (foreground_thread == GetCurrentThreadId () | |
2379 | || !AttachThreadInput (GetCurrentThreadId (), | |
2380 | foreground_thread, TRUE)) | |
2381 | foreground_thread = 0; | |
2382 | ||
2383 | child_thread = GetWindowThreadProcessId (cp->hwnd, NULL); | |
2384 | if (child_thread == GetCurrentThreadId () | |
2385 | || !AttachThreadInput (GetCurrentThreadId (), | |
2386 | child_thread, TRUE)) | |
2387 | child_thread = 0; | |
2388 | ||
2389 | /* Set the foreground window to the child. */ | |
2390 | if (SetForegroundWindow (cp->hwnd)) | |
2391 | { | |
2392 | /* Generate keystrokes as if user had typed Ctrl-Break or | |
2393 | Ctrl-C. */ | |
2394 | keybd_event (VK_CONTROL, control_scan_code, 0, 0); | |
2395 | keybd_event (vk_break_code, break_scan_code, | |
2396 | (vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY), 0); | |
2397 | keybd_event (vk_break_code, break_scan_code, | |
2398 | (vk_break_code == 'C' ? 0 : KEYEVENTF_EXTENDEDKEY) | |
2399 | | KEYEVENTF_KEYUP, 0); | |
2400 | keybd_event (VK_CONTROL, control_scan_code, | |
2401 | KEYEVENTF_KEYUP, 0); | |
2402 | ||
2403 | /* Sleep for a bit to give time for Emacs frame to respond | |
2404 | to focus change events (if Emacs was active app). */ | |
2405 | Sleep (100); | |
2406 | ||
2407 | SetForegroundWindow (foreground_window); | |
2408 | } | |
2409 | /* Detach from the foreground and child threads now that | |
2410 | the foreground switching is over. */ | |
2411 | if (foreground_thread) | |
2412 | AttachThreadInput (GetCurrentThreadId (), | |
2413 | foreground_thread, FALSE); | |
2414 | if (child_thread) | |
2415 | AttachThreadInput (GetCurrentThreadId (), | |
2416 | child_thread, FALSE); | |
2417 | } | |
2418 | } | |
c519b5e1 | 2419 | /* Ctrl-Break is NT equivalent of SIGINT. */ |
b2fc9f3d | 2420 | else if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid)) |
6cdfb6e6 | 2421 | { |
c519b5e1 | 2422 | DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d " |
6cdfb6e6 RS |
2423 | "for pid %lu\n", GetLastError (), pid)); |
2424 | errno = EINVAL; | |
c519b5e1 | 2425 | rc = -1; |
80874ef7 | 2426 | } |
6cdfb6e6 RS |
2427 | } |
2428 | else | |
2429 | { | |
b2fc9f3d GV |
2430 | if (NILP (Vw32_start_process_share_console) && cp && cp->hwnd) |
2431 | { | |
2432 | #if 1 | |
417a7a0e | 2433 | if (os_subtype == OS_9X) |
b2fc9f3d GV |
2434 | { |
2435 | /* | |
2436 | Another possibility is to try terminating the VDM out-right by | |
2437 | calling the Shell VxD (id 0x17) V86 interface, function #4 | |
2438 | "SHELL_Destroy_VM", ie. | |
2439 | ||
2440 | mov edx,4 | |
2441 | mov ebx,vm_handle | |
2442 | call shellapi | |
2443 | ||
2444 | First need to determine the current VM handle, and then arrange for | |
2445 | the shellapi call to be made from the system vm (by using | |
2446 | Switch_VM_and_callback). | |
2447 | ||
2448 | Could try to invoke DestroyVM through CallVxD. | |
2449 | ||
2450 | */ | |
ef79fbba | 2451 | #if 0 |
b46a6a83 | 2452 | /* On Windows 95, posting WM_QUIT causes the 16-bit subsystem |
ef79fbba GV |
2453 | to hang when cmdproxy is used in conjunction with |
2454 | command.com for an interactive shell. Posting | |
2455 | WM_CLOSE pops up a dialog that, when Yes is selected, | |
2456 | does the same thing. TerminateProcess is also less | |
2457 | than ideal in that subprocesses tend to stick around | |
2458 | until the machine is shutdown, but at least it | |
2459 | doesn't freeze the 16-bit subsystem. */ | |
b2fc9f3d | 2460 | PostMessage (cp->hwnd, WM_QUIT, 0xff, 0); |
ef79fbba GV |
2461 | #endif |
2462 | if (!TerminateProcess (proc_hand, 0xff)) | |
2463 | { | |
2464 | DebPrint (("sys_kill.TerminateProcess returned %d " | |
2465 | "for pid %lu\n", GetLastError (), pid)); | |
2466 | errno = EINVAL; | |
2467 | rc = -1; | |
2468 | } | |
b2fc9f3d GV |
2469 | } |
2470 | else | |
2471 | #endif | |
2472 | PostMessage (cp->hwnd, WM_CLOSE, 0, 0); | |
2473 | } | |
fbd6baed | 2474 | /* Kill the process. On W32 this doesn't kill child processes |
8eae7766 | 2475 | so it doesn't work very well for shells which is why it's not |
b2fc9f3d GV |
2476 | used in every case. */ |
2477 | else if (!TerminateProcess (proc_hand, 0xff)) | |
6cdfb6e6 | 2478 | { |
c519b5e1 | 2479 | DebPrint (("sys_kill.TerminateProcess returned %d " |
6cdfb6e6 RS |
2480 | "for pid %lu\n", GetLastError (), pid)); |
2481 | errno = EINVAL; | |
c519b5e1 | 2482 | rc = -1; |
6cdfb6e6 RS |
2483 | } |
2484 | } | |
c519b5e1 GV |
2485 | |
2486 | if (need_to_free) | |
2487 | CloseHandle (proc_hand); | |
2488 | ||
2489 | return rc; | |
6cdfb6e6 RS |
2490 | } |
2491 | ||
c519b5e1 GV |
2492 | /* The following two routines are used to manipulate stdin, stdout, and |
2493 | stderr of our child processes. | |
2494 | ||
2495 | Assuming that in, out, and err are *not* inheritable, we make them | |
2496 | stdin, stdout, and stderr of the child as follows: | |
2497 | ||
2498 | - Save the parent's current standard handles. | |
2499 | - Set the std handles to inheritable duplicates of the ones being passed in. | |
2500 | (Note that _get_osfhandle() is an io.h procedure that retrieves the | |
2501 | NT file handle for a crt file descriptor.) | |
2502 | - Spawn the child, which inherits in, out, and err as stdin, | |
2503 | stdout, and stderr. (see Spawnve) | |
2504 | - Close the std handles passed to the child. | |
2505 | - Reset the parent's standard handles to the saved handles. | |
2506 | (see reset_standard_handles) | |
2507 | We assume that the caller closes in, out, and err after calling us. */ | |
2508 | ||
2509 | void | |
2510 | prepare_standard_handles (int in, int out, int err, HANDLE handles[3]) | |
6cdfb6e6 | 2511 | { |
c519b5e1 GV |
2512 | HANDLE parent; |
2513 | HANDLE newstdin, newstdout, newstderr; | |
2514 | ||
2515 | parent = GetCurrentProcess (); | |
2516 | ||
2517 | handles[0] = GetStdHandle (STD_INPUT_HANDLE); | |
2518 | handles[1] = GetStdHandle (STD_OUTPUT_HANDLE); | |
2519 | handles[2] = GetStdHandle (STD_ERROR_HANDLE); | |
2520 | ||
2521 | /* make inheritable copies of the new handles */ | |
177c0ea7 | 2522 | if (!DuplicateHandle (parent, |
c519b5e1 GV |
2523 | (HANDLE) _get_osfhandle (in), |
2524 | parent, | |
177c0ea7 JB |
2525 | &newstdin, |
2526 | 0, | |
2527 | TRUE, | |
c519b5e1 GV |
2528 | DUPLICATE_SAME_ACCESS)) |
2529 | report_file_error ("Duplicating input handle for child", Qnil); | |
177c0ea7 | 2530 | |
c519b5e1 GV |
2531 | if (!DuplicateHandle (parent, |
2532 | (HANDLE) _get_osfhandle (out), | |
2533 | parent, | |
2534 | &newstdout, | |
2535 | 0, | |
2536 | TRUE, | |
2537 | DUPLICATE_SAME_ACCESS)) | |
2538 | report_file_error ("Duplicating output handle for child", Qnil); | |
177c0ea7 | 2539 | |
c519b5e1 GV |
2540 | if (!DuplicateHandle (parent, |
2541 | (HANDLE) _get_osfhandle (err), | |
2542 | parent, | |
2543 | &newstderr, | |
2544 | 0, | |
2545 | TRUE, | |
2546 | DUPLICATE_SAME_ACCESS)) | |
2547 | report_file_error ("Duplicating error handle for child", Qnil); | |
2548 | ||
2549 | /* and store them as our std handles */ | |
2550 | if (!SetStdHandle (STD_INPUT_HANDLE, newstdin)) | |
2551 | report_file_error ("Changing stdin handle", Qnil); | |
177c0ea7 | 2552 | |
c519b5e1 GV |
2553 | if (!SetStdHandle (STD_OUTPUT_HANDLE, newstdout)) |
2554 | report_file_error ("Changing stdout handle", Qnil); | |
2555 | ||
2556 | if (!SetStdHandle (STD_ERROR_HANDLE, newstderr)) | |
2557 | report_file_error ("Changing stderr handle", Qnil); | |
2558 | } | |
2559 | ||
2560 | void | |
2561 | reset_standard_handles (int in, int out, int err, HANDLE handles[3]) | |
2562 | { | |
2563 | /* close the duplicated handles passed to the child */ | |
2564 | CloseHandle (GetStdHandle (STD_INPUT_HANDLE)); | |
2565 | CloseHandle (GetStdHandle (STD_OUTPUT_HANDLE)); | |
2566 | CloseHandle (GetStdHandle (STD_ERROR_HANDLE)); | |
2567 | ||
2568 | /* now restore parent's saved std handles */ | |
2569 | SetStdHandle (STD_INPUT_HANDLE, handles[0]); | |
2570 | SetStdHandle (STD_OUTPUT_HANDLE, handles[1]); | |
2571 | SetStdHandle (STD_ERROR_HANDLE, handles[2]); | |
6cdfb6e6 | 2572 | } |
c519b5e1 | 2573 | |
b2fc9f3d GV |
2574 | void |
2575 | set_process_dir (char * dir) | |
2576 | { | |
2577 | process_dir = dir; | |
2578 | } | |
2579 | ||
a11e68d0 RS |
2580 | /* To avoid problems with winsock implementations that work over dial-up |
2581 | connections causing or requiring a connection to exist while Emacs is | |
2582 | running, Emacs no longer automatically loads winsock on startup if it | |
2583 | is present. Instead, it will be loaded when open-network-stream is | |
2584 | first called. | |
2585 | ||
2586 | To allow full control over when winsock is loaded, we provide these | |
2587 | two functions to dynamically load and unload winsock. This allows | |
2588 | dial-up users to only be connected when they actually need to use | |
2589 | socket services. */ | |
2590 | ||
7684e57b | 2591 | /* From w32.c */ |
a11e68d0 RS |
2592 | extern HANDLE winsock_lib; |
2593 | extern BOOL term_winsock (void); | |
2594 | extern BOOL init_winsock (int load_now); | |
2595 | ||
fbd6baed | 2596 | DEFUN ("w32-has-winsock", Fw32_has_winsock, Sw32_has_winsock, 0, 1, 0, |
33f09670 JR |
2597 | doc: /* Test for presence of the Windows socket library `winsock'. |
2598 | Returns non-nil if winsock support is present, nil otherwise. | |
2599 | ||
2600 | If the optional argument LOAD-NOW is non-nil, the winsock library is | |
2601 | also loaded immediately if not already loaded. If winsock is loaded, | |
2602 | the winsock local hostname is returned (since this may be different from | |
2603 | the value of `system-name' and should supplant it), otherwise t is | |
2604 | returned to indicate winsock support is present. */) | |
5842a27b | 2605 | (Lisp_Object load_now) |
a11e68d0 RS |
2606 | { |
2607 | int have_winsock; | |
2608 | ||
2609 | have_winsock = init_winsock (!NILP (load_now)); | |
2610 | if (have_winsock) | |
2611 | { | |
2612 | if (winsock_lib != NULL) | |
2613 | { | |
2614 | /* Return new value for system-name. The best way to do this | |
2615 | is to call init_system_name, saving and restoring the | |
2616 | original value to avoid side-effects. */ | |
2617 | Lisp_Object orig_hostname = Vsystem_name; | |
2618 | Lisp_Object hostname; | |
2619 | ||
2620 | init_system_name (); | |
2621 | hostname = Vsystem_name; | |
2622 | Vsystem_name = orig_hostname; | |
2623 | return hostname; | |
2624 | } | |
2625 | return Qt; | |
2626 | } | |
2627 | return Qnil; | |
2628 | } | |
2629 | ||
fbd6baed | 2630 | DEFUN ("w32-unload-winsock", Fw32_unload_winsock, Sw32_unload_winsock, |
a11e68d0 | 2631 | 0, 0, 0, |
33f09670 JR |
2632 | doc: /* Unload the Windows socket library `winsock' if loaded. |
2633 | This is provided to allow dial-up socket connections to be disconnected | |
2634 | when no longer needed. Returns nil without unloading winsock if any | |
2635 | socket connections still exist. */) | |
5842a27b | 2636 | (void) |
a11e68d0 RS |
2637 | { |
2638 | return term_winsock () ? Qt : Qnil; | |
2639 | } | |
2640 | ||
93fdf2f8 | 2641 | \f |
b2fc9f3d GV |
2642 | /* Some miscellaneous functions that are Windows specific, but not GUI |
2643 | specific (ie. are applicable in terminal or batch mode as well). */ | |
2644 | ||
b2fc9f3d | 2645 | DEFUN ("w32-short-file-name", Fw32_short_file_name, Sw32_short_file_name, 1, 1, 0, |
33f09670 JR |
2646 | doc: /* Return the short file name version (8.3) of the full path of FILENAME. |
2647 | If FILENAME does not exist, return nil. | |
2648 | All path elements in FILENAME are converted to their short names. */) | |
5842a27b | 2649 | (Lisp_Object filename) |
b2fc9f3d GV |
2650 | { |
2651 | char shortname[MAX_PATH]; | |
2652 | ||
b7826503 | 2653 | CHECK_STRING (filename); |
b2fc9f3d GV |
2654 | |
2655 | /* first expand it. */ | |
2656 | filename = Fexpand_file_name (filename, Qnil); | |
2657 | ||
2658 | /* luckily, this returns the short version of each element in the path. */ | |
1fd201bb EZ |
2659 | if (w32_get_short_filename (SDATA (ENCODE_FILE (filename)), |
2660 | shortname, MAX_PATH) == 0) | |
b2fc9f3d GV |
2661 | return Qnil; |
2662 | ||
1fd201bb | 2663 | dostounix_filename (shortname); |
b2fc9f3d | 2664 | |
e7ac588e | 2665 | /* No need to DECODE_FILE, because 8.3 names are pure ASCII. */ |
b2fc9f3d GV |
2666 | return build_string (shortname); |
2667 | } | |
2668 | ||
2669 | ||
2670 | DEFUN ("w32-long-file-name", Fw32_long_file_name, Sw32_long_file_name, | |
2671 | 1, 1, 0, | |
33f09670 JR |
2672 | doc: /* Return the long file name version of the full path of FILENAME. |
2673 | If FILENAME does not exist, return nil. | |
2674 | All path elements in FILENAME are converted to their long names. */) | |
5842a27b | 2675 | (Lisp_Object filename) |
b2fc9f3d | 2676 | { |
1fd201bb | 2677 | char longname[ MAX_UTF8_PATH ]; |
8dcaeba2 | 2678 | int drive_only = 0; |
b2fc9f3d | 2679 | |
b7826503 | 2680 | CHECK_STRING (filename); |
b2fc9f3d | 2681 | |
8dcaeba2 JR |
2682 | if (SBYTES (filename) == 2 |
2683 | && *(SDATA (filename) + 1) == ':') | |
2684 | drive_only = 1; | |
2685 | ||
b2fc9f3d GV |
2686 | /* first expand it. */ |
2687 | filename = Fexpand_file_name (filename, Qnil); | |
2688 | ||
1fd201bb EZ |
2689 | if (!w32_get_long_filename (SDATA (ENCODE_FILE (filename)), longname, |
2690 | MAX_UTF8_PATH)) | |
b2fc9f3d GV |
2691 | return Qnil; |
2692 | ||
1fd201bb | 2693 | dostounix_filename (longname); |
b2fc9f3d | 2694 | |
8dcaeba2 JR |
2695 | /* If we were passed only a drive, make sure that a slash is not appended |
2696 | for consistency with directories. Allow for drive mapping via SUBST | |
2697 | in case expand-file-name is ever changed to expand those. */ | |
2698 | if (drive_only && longname[1] == ':' && longname[2] == '/' && !longname[3]) | |
2699 | longname[2] = '\0'; | |
2700 | ||
1fd201bb | 2701 | return DECODE_FILE (build_unibyte_string (longname)); |
b2fc9f3d GV |
2702 | } |
2703 | ||
33f09670 JR |
2704 | DEFUN ("w32-set-process-priority", Fw32_set_process_priority, |
2705 | Sw32_set_process_priority, 2, 2, 0, | |
2706 | doc: /* Set the priority of PROCESS to PRIORITY. | |
2707 | If PROCESS is nil, the priority of Emacs is changed, otherwise the | |
2708 | priority of the process whose pid is PROCESS is changed. | |
2709 | PRIORITY should be one of the symbols high, normal, or low; | |
2710 | any other symbol will be interpreted as normal. | |
2711 | ||
2712 | If successful, the return value is t, otherwise nil. */) | |
5842a27b | 2713 | (Lisp_Object process, Lisp_Object priority) |
b2fc9f3d GV |
2714 | { |
2715 | HANDLE proc_handle = GetCurrentProcess (); | |
2716 | DWORD priority_class = NORMAL_PRIORITY_CLASS; | |
2717 | Lisp_Object result = Qnil; | |
2718 | ||
b7826503 | 2719 | CHECK_SYMBOL (priority); |
b2fc9f3d GV |
2720 | |
2721 | if (!NILP (process)) | |
2722 | { | |
2723 | DWORD pid; | |
2724 | child_process *cp; | |
2725 | ||
b7826503 | 2726 | CHECK_NUMBER (process); |
b2fc9f3d GV |
2727 | |
2728 | /* Allow pid to be an internally generated one, or one obtained | |
b46a6a83 | 2729 | externally. This is necessary because real pids on Windows 95 are |
b2fc9f3d GV |
2730 | negative. */ |
2731 | ||
2732 | pid = XINT (process); | |
2733 | cp = find_child_pid (pid); | |
2734 | if (cp != NULL) | |
2735 | pid = cp->procinfo.dwProcessId; | |
2736 | ||
2737 | proc_handle = OpenProcess (PROCESS_SET_INFORMATION, FALSE, pid); | |
2738 | } | |
2739 | ||
2740 | if (EQ (priority, Qhigh)) | |
2741 | priority_class = HIGH_PRIORITY_CLASS; | |
2742 | else if (EQ (priority, Qlow)) | |
2743 | priority_class = IDLE_PRIORITY_CLASS; | |
2744 | ||
2745 | if (proc_handle != NULL) | |
2746 | { | |
2747 | if (SetPriorityClass (proc_handle, priority_class)) | |
2748 | result = Qt; | |
2749 | if (!NILP (process)) | |
2750 | CloseHandle (proc_handle); | |
2751 | } | |
2752 | ||
2753 | return result; | |
2754 | } | |
2755 | ||
d613418b EZ |
2756 | #ifdef HAVE_LANGINFO_CODESET |
2757 | /* Emulation of nl_langinfo. Used in fns.c:Flocale_info. */ | |
b56ceb92 JB |
2758 | char * |
2759 | nl_langinfo (nl_item item) | |
d613418b EZ |
2760 | { |
2761 | /* Conversion of Posix item numbers to their Windows equivalents. */ | |
2762 | static const LCTYPE w32item[] = { | |
2763 | LOCALE_IDEFAULTANSICODEPAGE, | |
2764 | LOCALE_SDAYNAME1, LOCALE_SDAYNAME2, LOCALE_SDAYNAME3, | |
2765 | LOCALE_SDAYNAME4, LOCALE_SDAYNAME5, LOCALE_SDAYNAME6, LOCALE_SDAYNAME7, | |
2766 | LOCALE_SMONTHNAME1, LOCALE_SMONTHNAME2, LOCALE_SMONTHNAME3, | |
2767 | LOCALE_SMONTHNAME4, LOCALE_SMONTHNAME5, LOCALE_SMONTHNAME6, | |
2768 | LOCALE_SMONTHNAME7, LOCALE_SMONTHNAME8, LOCALE_SMONTHNAME9, | |
2769 | LOCALE_SMONTHNAME10, LOCALE_SMONTHNAME11, LOCALE_SMONTHNAME12 | |
2770 | }; | |
2771 | ||
2772 | static char *nl_langinfo_buf = NULL; | |
2773 | static int nl_langinfo_len = 0; | |
2774 | ||
2775 | if (nl_langinfo_len <= 0) | |
2776 | nl_langinfo_buf = xmalloc (nl_langinfo_len = 1); | |
2777 | ||
2778 | if (item < 0 || item >= _NL_NUM) | |
2779 | nl_langinfo_buf[0] = 0; | |
2780 | else | |
2781 | { | |
2782 | LCID cloc = GetThreadLocale (); | |
2783 | int need_len = GetLocaleInfo (cloc, w32item[item] | LOCALE_USE_CP_ACP, | |
2784 | NULL, 0); | |
2785 | ||
2786 | if (need_len <= 0) | |
2787 | nl_langinfo_buf[0] = 0; | |
2788 | else | |
2789 | { | |
2790 | if (item == CODESET) | |
2791 | { | |
2792 | need_len += 2; /* for the "cp" prefix */ | |
2793 | if (need_len < 8) /* for the case we call GetACP */ | |
2794 | need_len = 8; | |
2795 | } | |
2796 | if (nl_langinfo_len <= need_len) | |
2797 | nl_langinfo_buf = xrealloc (nl_langinfo_buf, | |
2798 | nl_langinfo_len = need_len); | |
2799 | if (!GetLocaleInfo (cloc, w32item[item] | LOCALE_USE_CP_ACP, | |
2800 | nl_langinfo_buf, nl_langinfo_len)) | |
2801 | nl_langinfo_buf[0] = 0; | |
2802 | else if (item == CODESET) | |
2803 | { | |
2804 | if (strcmp (nl_langinfo_buf, "0") == 0 /* CP_ACP */ | |
2805 | || strcmp (nl_langinfo_buf, "1") == 0) /* CP_OEMCP */ | |
2806 | sprintf (nl_langinfo_buf, "cp%u", GetACP ()); | |
2807 | else | |
2808 | { | |
2809 | memmove (nl_langinfo_buf + 2, nl_langinfo_buf, | |
2810 | strlen (nl_langinfo_buf) + 1); | |
2811 | nl_langinfo_buf[0] = 'c'; | |
2812 | nl_langinfo_buf[1] = 'p'; | |
2813 | } | |
2814 | } | |
2815 | } | |
2816 | } | |
2817 | return nl_langinfo_buf; | |
2818 | } | |
2819 | #endif /* HAVE_LANGINFO_CODESET */ | |
b2fc9f3d | 2820 | |
33f09670 JR |
2821 | DEFUN ("w32-get-locale-info", Fw32_get_locale_info, |
2822 | Sw32_get_locale_info, 1, 2, 0, | |
2823 | doc: /* Return information about the Windows locale LCID. | |
2824 | By default, return a three letter locale code which encodes the default | |
35f36d65 | 2825 | language as the first two characters, and the country or regional variant |
33f09670 JR |
2826 | as the third letter. For example, ENU refers to `English (United States)', |
2827 | while ENC means `English (Canadian)'. | |
2828 | ||
2829 | If the optional argument LONGFORM is t, the long form of the locale | |
2830 | name is returned, e.g. `English (United States)' instead; if LONGFORM | |
2831 | is a number, it is interpreted as an LCTYPE constant and the corresponding | |
2832 | locale information is returned. | |
2833 | ||
2834 | If LCID (a 16-bit number) is not a valid locale, the result is nil. */) | |
5842a27b | 2835 | (Lisp_Object lcid, Lisp_Object longform) |
b2fc9f3d GV |
2836 | { |
2837 | int got_abbrev; | |
2838 | int got_full; | |
2839 | char abbrev_name[32] = { 0 }; | |
2840 | char full_name[256] = { 0 }; | |
2841 | ||
b7826503 | 2842 | CHECK_NUMBER (lcid); |
b2fc9f3d GV |
2843 | |
2844 | if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED)) | |
2845 | return Qnil; | |
2846 | ||
2847 | if (NILP (longform)) | |
2848 | { | |
2849 | got_abbrev = GetLocaleInfo (XINT (lcid), | |
2850 | LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP, | |
2851 | abbrev_name, sizeof (abbrev_name)); | |
2852 | if (got_abbrev) | |
2853 | return build_string (abbrev_name); | |
2854 | } | |
0eaf5926 | 2855 | else if (EQ (longform, Qt)) |
b2fc9f3d GV |
2856 | { |
2857 | got_full = GetLocaleInfo (XINT (lcid), | |
2858 | LOCALE_SLANGUAGE | LOCALE_USE_CP_ACP, | |
2859 | full_name, sizeof (full_name)); | |
2860 | if (got_full) | |
011a0143 | 2861 | return DECODE_SYSTEM (build_string (full_name)); |
b2fc9f3d | 2862 | } |
0eaf5926 GV |
2863 | else if (NUMBERP (longform)) |
2864 | { | |
2865 | got_full = GetLocaleInfo (XINT (lcid), | |
2866 | XINT (longform), | |
2867 | full_name, sizeof (full_name)); | |
96512555 EZ |
2868 | /* GetLocaleInfo's return value includes the terminating null |
2869 | character, when the returned information is a string, whereas | |
2870 | make_unibyte_string needs the string length without the | |
2871 | terminating null. */ | |
0eaf5926 | 2872 | if (got_full) |
96512555 | 2873 | return make_unibyte_string (full_name, got_full - 1); |
0eaf5926 | 2874 | } |
b2fc9f3d GV |
2875 | |
2876 | return Qnil; | |
2877 | } | |
2878 | ||
2879 | ||
33f09670 JR |
2880 | DEFUN ("w32-get-current-locale-id", Fw32_get_current_locale_id, |
2881 | Sw32_get_current_locale_id, 0, 0, 0, | |
2882 | doc: /* Return Windows locale id for current locale setting. | |
2883 | This is a numerical value; use `w32-get-locale-info' to convert to a | |
2884 | human-readable form. */) | |
5842a27b | 2885 | (void) |
b2fc9f3d GV |
2886 | { |
2887 | return make_number (GetThreadLocale ()); | |
2888 | } | |
2889 | ||
24f981c9 | 2890 | static DWORD |
b56ceb92 | 2891 | int_from_hex (char * s) |
ef79fbba GV |
2892 | { |
2893 | DWORD val = 0; | |
2894 | static char hex[] = "0123456789abcdefABCDEF"; | |
2895 | char * p; | |
2896 | ||
ed3751c8 | 2897 | while (*s && (p = strchr (hex, *s)) != NULL) |
ef79fbba GV |
2898 | { |
2899 | unsigned digit = p - hex; | |
2900 | if (digit > 15) | |
2901 | digit -= 6; | |
2902 | val = val * 16 + digit; | |
2903 | s++; | |
2904 | } | |
2905 | return val; | |
2906 | } | |
2907 | ||
2908 | /* We need to build a global list, since the EnumSystemLocale callback | |
2909 | function isn't given a context pointer. */ | |
2910 | Lisp_Object Vw32_valid_locale_ids; | |
2911 | ||
24f981c9 | 2912 | static BOOL CALLBACK |
b56ceb92 | 2913 | enum_locale_fn (LPTSTR localeNum) |
ef79fbba GV |
2914 | { |
2915 | DWORD id = int_from_hex (localeNum); | |
2916 | Vw32_valid_locale_ids = Fcons (make_number (id), Vw32_valid_locale_ids); | |
2917 | return TRUE; | |
2918 | } | |
2919 | ||
33f09670 JR |
2920 | DEFUN ("w32-get-valid-locale-ids", Fw32_get_valid_locale_ids, |
2921 | Sw32_get_valid_locale_ids, 0, 0, 0, | |
2922 | doc: /* Return list of all valid Windows locale ids. | |
2923 | Each id is a numerical value; use `w32-get-locale-info' to convert to a | |
2924 | human-readable form. */) | |
5842a27b | 2925 | (void) |
ef79fbba GV |
2926 | { |
2927 | Vw32_valid_locale_ids = Qnil; | |
2928 | ||
2929 | EnumSystemLocales (enum_locale_fn, LCID_SUPPORTED); | |
2930 | ||
2931 | Vw32_valid_locale_ids = Fnreverse (Vw32_valid_locale_ids); | |
2932 | return Vw32_valid_locale_ids; | |
2933 | } | |
2934 | ||
b2fc9f3d GV |
2935 | |
2936 | DEFUN ("w32-get-default-locale-id", Fw32_get_default_locale_id, Sw32_get_default_locale_id, 0, 1, 0, | |
33f09670 JR |
2937 | doc: /* Return Windows locale id for default locale setting. |
2938 | By default, the system default locale setting is returned; if the optional | |
2939 | parameter USERP is non-nil, the user default locale setting is returned. | |
2940 | This is a numerical value; use `w32-get-locale-info' to convert to a | |
2941 | human-readable form. */) | |
5842a27b | 2942 | (Lisp_Object userp) |
b2fc9f3d GV |
2943 | { |
2944 | if (NILP (userp)) | |
2945 | return make_number (GetSystemDefaultLCID ()); | |
2946 | return make_number (GetUserDefaultLCID ()); | |
2947 | } | |
2948 | ||
177c0ea7 | 2949 | |
b2fc9f3d | 2950 | DEFUN ("w32-set-current-locale", Fw32_set_current_locale, Sw32_set_current_locale, 1, 1, 0, |
33f09670 JR |
2951 | doc: /* Make Windows locale LCID be the current locale setting for Emacs. |
2952 | If successful, the new locale id is returned, otherwise nil. */) | |
5842a27b | 2953 | (Lisp_Object lcid) |
b2fc9f3d | 2954 | { |
b7826503 | 2955 | CHECK_NUMBER (lcid); |
b2fc9f3d GV |
2956 | |
2957 | if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED)) | |
2958 | return Qnil; | |
2959 | ||
2960 | if (!SetThreadLocale (XINT (lcid))) | |
2961 | return Qnil; | |
2962 | ||
ef79fbba GV |
2963 | /* Need to set input thread locale if present. */ |
2964 | if (dwWindowsThreadId) | |
2965 | /* Reply is not needed. */ | |
2966 | PostThreadMessage (dwWindowsThreadId, WM_EMACS_SETLOCALE, XINT (lcid), 0); | |
2967 | ||
b2fc9f3d GV |
2968 | return make_number (GetThreadLocale ()); |
2969 | } | |
2970 | ||
0eaf5926 GV |
2971 | |
2972 | /* We need to build a global list, since the EnumCodePages callback | |
2973 | function isn't given a context pointer. */ | |
2974 | Lisp_Object Vw32_valid_codepages; | |
2975 | ||
24f981c9 | 2976 | static BOOL CALLBACK |
b56ceb92 | 2977 | enum_codepage_fn (LPTSTR codepageNum) |
0eaf5926 GV |
2978 | { |
2979 | DWORD id = atoi (codepageNum); | |
2980 | Vw32_valid_codepages = Fcons (make_number (id), Vw32_valid_codepages); | |
2981 | return TRUE; | |
2982 | } | |
2983 | ||
33f09670 JR |
2984 | DEFUN ("w32-get-valid-codepages", Fw32_get_valid_codepages, |
2985 | Sw32_get_valid_codepages, 0, 0, 0, | |
2986 | doc: /* Return list of all valid Windows codepages. */) | |
5842a27b | 2987 | (void) |
0eaf5926 GV |
2988 | { |
2989 | Vw32_valid_codepages = Qnil; | |
2990 | ||
2991 | EnumSystemCodePages (enum_codepage_fn, CP_SUPPORTED); | |
2992 | ||
2993 | Vw32_valid_codepages = Fnreverse (Vw32_valid_codepages); | |
2994 | return Vw32_valid_codepages; | |
2995 | } | |
2996 | ||
2997 | ||
33f09670 JR |
2998 | DEFUN ("w32-get-console-codepage", Fw32_get_console_codepage, |
2999 | Sw32_get_console_codepage, 0, 0, 0, | |
3000 | doc: /* Return current Windows codepage for console input. */) | |
5842a27b | 3001 | (void) |
0eaf5926 GV |
3002 | { |
3003 | return make_number (GetConsoleCP ()); | |
3004 | } | |
3005 | ||
177c0ea7 | 3006 | |
33f09670 JR |
3007 | DEFUN ("w32-set-console-codepage", Fw32_set_console_codepage, |
3008 | Sw32_set_console_codepage, 1, 1, 0, | |
62356a1b EZ |
3009 | doc: /* Make Windows codepage CP be the codepage for Emacs tty keyboard input. |
3010 | This codepage setting affects keyboard input in tty mode. | |
33f09670 | 3011 | If successful, the new CP is returned, otherwise nil. */) |
5842a27b | 3012 | (Lisp_Object cp) |
0eaf5926 | 3013 | { |
b7826503 | 3014 | CHECK_NUMBER (cp); |
0eaf5926 GV |
3015 | |
3016 | if (!IsValidCodePage (XINT (cp))) | |
3017 | return Qnil; | |
3018 | ||
3019 | if (!SetConsoleCP (XINT (cp))) | |
3020 | return Qnil; | |
3021 | ||
3022 | return make_number (GetConsoleCP ()); | |
3023 | } | |
3024 | ||
3025 | ||
33f09670 JR |
3026 | DEFUN ("w32-get-console-output-codepage", Fw32_get_console_output_codepage, |
3027 | Sw32_get_console_output_codepage, 0, 0, 0, | |
3028 | doc: /* Return current Windows codepage for console output. */) | |
5842a27b | 3029 | (void) |
0eaf5926 GV |
3030 | { |
3031 | return make_number (GetConsoleOutputCP ()); | |
3032 | } | |
3033 | ||
177c0ea7 | 3034 | |
33f09670 JR |
3035 | DEFUN ("w32-set-console-output-codepage", Fw32_set_console_output_codepage, |
3036 | Sw32_set_console_output_codepage, 1, 1, 0, | |
62356a1b EZ |
3037 | doc: /* Make Windows codepage CP be the codepage for Emacs console output. |
3038 | This codepage setting affects display in tty mode. | |
33f09670 | 3039 | If successful, the new CP is returned, otherwise nil. */) |
5842a27b | 3040 | (Lisp_Object cp) |
0eaf5926 | 3041 | { |
b7826503 | 3042 | CHECK_NUMBER (cp); |
0eaf5926 GV |
3043 | |
3044 | if (!IsValidCodePage (XINT (cp))) | |
3045 | return Qnil; | |
3046 | ||
3047 | if (!SetConsoleOutputCP (XINT (cp))) | |
3048 | return Qnil; | |
3049 | ||
3050 | return make_number (GetConsoleOutputCP ()); | |
3051 | } | |
3052 | ||
3053 | ||
33f09670 JR |
3054 | DEFUN ("w32-get-codepage-charset", Fw32_get_codepage_charset, |
3055 | Sw32_get_codepage_charset, 1, 1, 0, | |
62356a1b | 3056 | doc: /* Return charset ID corresponding to codepage CP. |
33f09670 | 3057 | Returns nil if the codepage is not valid. */) |
5842a27b | 3058 | (Lisp_Object cp) |
0eaf5926 GV |
3059 | { |
3060 | CHARSETINFO info; | |
3061 | ||
b7826503 | 3062 | CHECK_NUMBER (cp); |
0eaf5926 GV |
3063 | |
3064 | if (!IsValidCodePage (XINT (cp))) | |
3065 | return Qnil; | |
3066 | ||
3067 | if (TranslateCharsetInfo ((DWORD *) XINT (cp), &info, TCI_SRCCODEPAGE)) | |
3068 | return make_number (info.ciCharset); | |
3069 | ||
3070 | return Qnil; | |
3071 | } | |
3072 | ||
3073 | ||
33f09670 JR |
3074 | DEFUN ("w32-get-valid-keyboard-layouts", Fw32_get_valid_keyboard_layouts, |
3075 | Sw32_get_valid_keyboard_layouts, 0, 0, 0, | |
3076 | doc: /* Return list of Windows keyboard languages and layouts. | |
3077 | The return value is a list of pairs of language id and layout id. */) | |
5842a27b | 3078 | (void) |
0eaf5926 GV |
3079 | { |
3080 | int num_layouts = GetKeyboardLayoutList (0, NULL); | |
3081 | HKL * layouts = (HKL *) alloca (num_layouts * sizeof (HKL)); | |
3082 | Lisp_Object obj = Qnil; | |
3083 | ||
3084 | if (GetKeyboardLayoutList (num_layouts, layouts) == num_layouts) | |
3085 | { | |
3086 | while (--num_layouts >= 0) | |
3087 | { | |
bd717ca4 | 3088 | HKL kl = layouts[num_layouts]; |
0eaf5926 | 3089 | |
bd717ca4 FP |
3090 | obj = Fcons (Fcons (make_number (LOWORD (kl)), |
3091 | make_number (HIWORD (kl))), | |
0eaf5926 GV |
3092 | obj); |
3093 | } | |
3094 | } | |
3095 | ||
3096 | return obj; | |
3097 | } | |
3098 | ||
3099 | ||
33f09670 JR |
3100 | DEFUN ("w32-get-keyboard-layout", Fw32_get_keyboard_layout, |
3101 | Sw32_get_keyboard_layout, 0, 0, 0, | |
3102 | doc: /* Return current Windows keyboard language and layout. | |
3103 | The return value is the cons of the language id and the layout id. */) | |
5842a27b | 3104 | (void) |
0eaf5926 | 3105 | { |
bd717ca4 | 3106 | HKL kl = GetKeyboardLayout (dwWindowsThreadId); |
0eaf5926 | 3107 | |
bd717ca4 FP |
3108 | return Fcons (make_number (LOWORD (kl)), |
3109 | make_number (HIWORD (kl))); | |
0eaf5926 GV |
3110 | } |
3111 | ||
177c0ea7 | 3112 | |
33f09670 JR |
3113 | DEFUN ("w32-set-keyboard-layout", Fw32_set_keyboard_layout, |
3114 | Sw32_set_keyboard_layout, 1, 1, 0, | |
3115 | doc: /* Make LAYOUT be the current keyboard layout for Emacs. | |
3116 | The keyboard layout setting affects interpretation of keyboard input. | |
3117 | If successful, the new layout id is returned, otherwise nil. */) | |
5842a27b | 3118 | (Lisp_Object layout) |
0eaf5926 | 3119 | { |
bd717ca4 | 3120 | HKL kl; |
0eaf5926 | 3121 | |
b7826503 | 3122 | CHECK_CONS (layout); |
f4532092 AI |
3123 | CHECK_NUMBER_CAR (layout); |
3124 | CHECK_NUMBER_CDR (layout); | |
0eaf5926 | 3125 | |
bd717ca4 FP |
3126 | kl = (HKL) ((XINT (XCAR (layout)) & 0xffff) |
3127 | | (XINT (XCDR (layout)) << 16)); | |
0eaf5926 GV |
3128 | |
3129 | /* Synchronize layout with input thread. */ | |
3130 | if (dwWindowsThreadId) | |
3131 | { | |
3132 | if (PostThreadMessage (dwWindowsThreadId, WM_EMACS_SETKEYBOARDLAYOUT, | |
3133 | (WPARAM) kl, 0)) | |
3134 | { | |
3135 | MSG msg; | |
3136 | GetMessage (&msg, NULL, WM_EMACS_DONE, WM_EMACS_DONE); | |
3137 | ||
3138 | if (msg.wParam == 0) | |
3139 | return Qnil; | |
3140 | } | |
3141 | } | |
bd717ca4 | 3142 | else if (!ActivateKeyboardLayout (kl, 0)) |
0eaf5926 GV |
3143 | return Qnil; |
3144 | ||
3145 | return Fw32_get_keyboard_layout (); | |
3146 | } | |
3147 | ||
b2fc9f3d | 3148 | \f |
b56ceb92 JB |
3149 | void |
3150 | syms_of_ntproc (void) | |
93fdf2f8 | 3151 | { |
51128692 JR |
3152 | DEFSYM (Qhigh, "high"); |
3153 | DEFSYM (Qlow, "low"); | |
b2fc9f3d | 3154 | |
fbd6baed GV |
3155 | defsubr (&Sw32_has_winsock); |
3156 | defsubr (&Sw32_unload_winsock); | |
7d701334 | 3157 | |
b2fc9f3d GV |
3158 | defsubr (&Sw32_short_file_name); |
3159 | defsubr (&Sw32_long_file_name); | |
3160 | defsubr (&Sw32_set_process_priority); | |
3161 | defsubr (&Sw32_get_locale_info); | |
3162 | defsubr (&Sw32_get_current_locale_id); | |
3163 | defsubr (&Sw32_get_default_locale_id); | |
ef79fbba | 3164 | defsubr (&Sw32_get_valid_locale_ids); |
b2fc9f3d | 3165 | defsubr (&Sw32_set_current_locale); |
a11e68d0 | 3166 | |
0eaf5926 GV |
3167 | defsubr (&Sw32_get_console_codepage); |
3168 | defsubr (&Sw32_set_console_codepage); | |
3169 | defsubr (&Sw32_get_console_output_codepage); | |
3170 | defsubr (&Sw32_set_console_output_codepage); | |
3171 | defsubr (&Sw32_get_valid_codepages); | |
3172 | defsubr (&Sw32_get_codepage_charset); | |
3173 | ||
3174 | defsubr (&Sw32_get_valid_keyboard_layouts); | |
3175 | defsubr (&Sw32_get_keyboard_layout); | |
3176 | defsubr (&Sw32_set_keyboard_layout); | |
3177 | ||
29208e82 | 3178 | DEFVAR_LISP ("w32-quote-process-args", Vw32_quote_process_args, |
33f09670 JR |
3179 | doc: /* Non-nil enables quoting of process arguments to ensure correct parsing. |
3180 | Because Windows does not directly pass argv arrays to child processes, | |
3181 | programs have to reconstruct the argv array by parsing the command | |
3182 | line string. For an argument to contain a space, it must be enclosed | |
3183 | in double quotes or it will be parsed as multiple arguments. | |
3184 | ||
3185 | If the value is a character, that character will be used to escape any | |
3186 | quote characters that appear, otherwise a suitable escape character | |
3187 | will be chosen based on the type of the program. */); | |
b2fc9f3d | 3188 | Vw32_quote_process_args = Qt; |
817abdf6 | 3189 | |
fbd6baed | 3190 | DEFVAR_LISP ("w32-start-process-show-window", |
29208e82 | 3191 | Vw32_start_process_show_window, |
33f09670 JR |
3192 | doc: /* When nil, new child processes hide their windows. |
3193 | When non-nil, they show their window in the method of their choice. | |
3194 | This variable doesn't affect GUI applications, which will never be hidden. */); | |
fbd6baed | 3195 | Vw32_start_process_show_window = Qnil; |
0ecf7d36 | 3196 | |
b2fc9f3d | 3197 | DEFVAR_LISP ("w32-start-process-share-console", |
29208e82 | 3198 | Vw32_start_process_share_console, |
33f09670 JR |
3199 | doc: /* When nil, new child processes are given a new console. |
3200 | When non-nil, they share the Emacs console; this has the limitation of | |
804d894a | 3201 | allowing only one DOS subprocess to run at a time (whether started directly |
33f09670 JR |
3202 | or indirectly by Emacs), and preventing Emacs from cleanly terminating the |
3203 | subprocess group, but may allow Emacs to interrupt a subprocess that doesn't | |
3204 | otherwise respond to interrupts from Emacs. */); | |
b2fc9f3d GV |
3205 | Vw32_start_process_share_console = Qnil; |
3206 | ||
82e7c0a9 | 3207 | DEFVAR_LISP ("w32-start-process-inherit-error-mode", |
29208e82 | 3208 | Vw32_start_process_inherit_error_mode, |
33f09670 JR |
3209 | doc: /* When nil, new child processes revert to the default error mode. |
3210 | When non-nil, they inherit their error mode setting from Emacs, which stops | |
3211 | them blocking when trying to access unmounted drives etc. */); | |
82e7c0a9 AI |
3212 | Vw32_start_process_inherit_error_mode = Qt; |
3213 | ||
29208e82 | 3214 | DEFVAR_INT ("w32-pipe-read-delay", w32_pipe_read_delay, |
33f09670 JR |
3215 | doc: /* Forced delay before reading subprocess output. |
3216 | This is done to improve the buffering of subprocess output, by | |
3217 | avoiding the inefficiency of frequently reading small amounts of data. | |
3218 | ||
3219 | If positive, the value is the number of milliseconds to sleep before | |
3220 | reading the subprocess output. If negative, the magnitude is the number | |
3221 | of time slices to wait (effectively boosting the priority of the child | |
3222 | process temporarily). A value of zero disables waiting entirely. */); | |
5322f50b | 3223 | w32_pipe_read_delay = 50; |
0c04091e | 3224 | |
29208e82 | 3225 | DEFVAR_LISP ("w32-downcase-file-names", Vw32_downcase_file_names, |
33f09670 JR |
3226 | doc: /* Non-nil means convert all-upper case file names to lower case. |
3227 | This applies when performing completions and file name expansion. | |
3228 | Note that the value of this setting also affects remote file names, | |
3229 | so you probably don't want to set to non-nil if you use case-sensitive | |
177c0ea7 | 3230 | filesystems via ange-ftp. */); |
fbd6baed | 3231 | Vw32_downcase_file_names = Qnil; |
b2fc9f3d GV |
3232 | |
3233 | #if 0 | |
29208e82 | 3234 | DEFVAR_LISP ("w32-generate-fake-inodes", Vw32_generate_fake_inodes, |
33f09670 JR |
3235 | doc: /* Non-nil means attempt to fake realistic inode values. |
3236 | This works by hashing the truename of files, and should detect | |
3237 | aliasing between long and short (8.3 DOS) names, but can have | |
4c36be58 | 3238 | false positives because of hash collisions. Note that determining |
33f09670 | 3239 | the truename of a file can be slow. */); |
b2fc9f3d GV |
3240 | Vw32_generate_fake_inodes = Qnil; |
3241 | #endif | |
3242 | ||
29208e82 | 3243 | DEFVAR_LISP ("w32-get-true-file-attributes", Vw32_get_true_file_attributes, |
ed4c17bb EZ |
3244 | doc: /* Non-nil means determine accurate file attributes in `file-attributes'. |
3245 | This option controls whether to issue additional system calls to determine | |
017dab84 | 3246 | accurate link counts, file type, and ownership information. It is more |
ed4c17bb | 3247 | useful for files on NTFS volumes, where hard links and file security are |
017dab84 | 3248 | supported, than on volumes of the FAT family. |
ed4c17bb EZ |
3249 | |
3250 | Without these system calls, link count will always be reported as 1 and file | |
3251 | ownership will be attributed to the current user. | |
3252 | The default value `local' means only issue these system calls for files | |
3253 | on local fixed drives. A value of nil means never issue them. | |
3254 | Any other non-nil value means do this even on remote and removable drives | |
3255 | where the performance impact may be noticeable even on modern hardware. */); | |
2fa4f090 | 3256 | Vw32_get_true_file_attributes = Qlocal; |
af621bc3 EZ |
3257 | |
3258 | staticpro (&Vw32_valid_locale_ids); | |
3259 | staticpro (&Vw32_valid_codepages); | |
93fdf2f8 | 3260 | } |
42a7e7f1 | 3261 | /* end of w32proc.c */ |