Commit | Line | Data |
---|---|---|
e9e23e23 | 1 | /* Process support for GNU Emacs on the Microsoft W32 API. |
22759c72 | 2 | Copyright (C) 1992, 1995 Free Software Foundation, Inc. |
6cdfb6e6 | 3 | |
3b7ad313 EN |
4 | This file is part of GNU Emacs. |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. | |
6cdfb6e6 RS |
20 | |
21 | Drew Bliss Oct 14, 1993 | |
22 | Adapted from alarm.c by Tim Fleehart | |
23 | */ | |
24 | ||
25 | #include <stdio.h> | |
26 | #include <stdlib.h> | |
27 | #include <errno.h> | |
28 | #include <io.h> | |
c519b5e1 | 29 | #include <fcntl.h> |
6cdfb6e6 RS |
30 | #include <signal.h> |
31 | ||
c519b5e1 GV |
32 | /* must include CRT headers *before* config.h */ |
33 | #include "config.h" | |
34 | #undef signal | |
35 | #undef wait | |
36 | #undef spawnve | |
37 | #undef select | |
38 | #undef kill | |
39 | ||
6cdfb6e6 RS |
40 | #include <windows.h> |
41 | ||
42 | #include "lisp.h" | |
489f9371 | 43 | #include "w32.h" |
6cdfb6e6 | 44 | #include "systime.h" |
3d7eead0 GV |
45 | #include "syswait.h" |
46 | #include "process.h" | |
47 | ||
93fdf2f8 RS |
48 | /* Control whether spawnve quotes arguments as necessary to ensure |
49 | correct parsing by child process. Because not all uses of spawnve | |
50 | are careful about constructing argv arrays, we make this behaviour | |
51 | conditional (off by default). */ | |
fbd6baed | 52 | Lisp_Object Vw32_quote_process_args; |
93fdf2f8 | 53 | |
0ecf7d36 RS |
54 | /* Control whether create_child causes the process' window to be |
55 | hidden. The default is nil. */ | |
fbd6baed | 56 | Lisp_Object Vw32_start_process_show_window; |
0ecf7d36 | 57 | |
817abdf6 KH |
58 | /* Time to sleep before reading from a subprocess output pipe - this |
59 | avoids the inefficiency of frequently reading small amounts of data. | |
60 | This is primarily necessary for handling DOS processes on Windows 95, | |
e9e23e23 | 61 | but is useful for W32 processes on both Windows 95 and NT as well. */ |
fbd6baed | 62 | Lisp_Object Vw32_pipe_read_delay; |
817abdf6 | 63 | |
0c04091e RS |
64 | /* Control conversion of upper case file names to lower case. |
65 | nil means no, t means yes. */ | |
fbd6baed | 66 | Lisp_Object Vw32_downcase_file_names; |
0c04091e | 67 | |
57445e59 | 68 | /* Keep track of whether we have already started a DOS program. */ |
817abdf6 KH |
69 | BOOL dos_process_running; |
70 | ||
3d7eead0 GV |
71 | #ifndef SYS_SIGLIST_DECLARED |
72 | extern char *sys_siglist[]; | |
73 | #endif | |
6cdfb6e6 | 74 | |
6cdfb6e6 | 75 | #ifdef EMACSDEBUG |
c519b5e1 | 76 | void _DebPrint (const char *fmt, ...) |
6cdfb6e6 | 77 | { |
c519b5e1 | 78 | char buf[1024]; |
6cdfb6e6 RS |
79 | va_list args; |
80 | ||
81 | va_start (args, fmt); | |
82 | vsprintf (buf, fmt, args); | |
83 | va_end (args); | |
84 | OutputDebugString (buf); | |
85 | } | |
86 | #endif | |
87 | ||
c519b5e1 | 88 | typedef void (_CALLBACK_ *signal_handler)(int); |
6cdfb6e6 RS |
89 | |
90 | /* Signal handlers...SIG_DFL == 0 so this is initialized correctly. */ | |
91 | static signal_handler sig_handlers[NSIG]; | |
92 | ||
93 | /* Fake signal implementation to record the SIGCHLD handler. */ | |
94 | signal_handler | |
c519b5e1 | 95 | sys_signal (int sig, signal_handler handler) |
6cdfb6e6 RS |
96 | { |
97 | signal_handler old; | |
98 | ||
99 | if (sig != SIGCHLD) | |
100 | { | |
101 | errno = EINVAL; | |
102 | return SIG_ERR; | |
103 | } | |
104 | old = sig_handlers[sig]; | |
105 | sig_handlers[sig] = handler; | |
106 | return old; | |
107 | } | |
108 | ||
c519b5e1 GV |
109 | /* Defined in <process.h> which conflicts with the local copy */ |
110 | #define _P_NOWAIT 1 | |
111 | ||
112 | /* Child process management list. */ | |
113 | int child_proc_count = 0; | |
114 | child_process child_procs[ MAX_CHILDREN ]; | |
115 | child_process *dead_child = NULL; | |
116 | ||
117 | DWORD WINAPI reader_thread (void *arg); | |
118 | ||
6cdfb6e6 | 119 | /* Find an unused process slot. */ |
c519b5e1 | 120 | child_process * |
6cdfb6e6 RS |
121 | new_child (void) |
122 | { | |
123 | child_process *cp; | |
c519b5e1 | 124 | DWORD id; |
6cdfb6e6 RS |
125 | |
126 | for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--) | |
127 | if (!CHILD_ACTIVE (cp)) | |
c519b5e1 GV |
128 | goto Initialise; |
129 | if (child_proc_count == MAX_CHILDREN) | |
130 | return NULL; | |
131 | cp = &child_procs[child_proc_count++]; | |
132 | ||
133 | Initialise: | |
134 | memset (cp, 0, sizeof(*cp)); | |
135 | cp->fd = -1; | |
136 | cp->pid = -1; | |
137 | cp->procinfo.hProcess = NULL; | |
138 | cp->status = STATUS_READ_ERROR; | |
139 | ||
140 | /* use manual reset event so that select() will function properly */ | |
141 | cp->char_avail = CreateEvent (NULL, TRUE, FALSE, NULL); | |
142 | if (cp->char_avail) | |
143 | { | |
144 | cp->char_consumed = CreateEvent (NULL, FALSE, FALSE, NULL); | |
145 | if (cp->char_consumed) | |
146 | { | |
147 | cp->thrd = CreateThread (NULL, 1024, reader_thread, cp, 0, &id); | |
148 | if (cp->thrd) | |
149 | return cp; | |
150 | } | |
151 | } | |
152 | delete_child (cp); | |
153 | return NULL; | |
154 | } | |
155 | ||
156 | void | |
157 | delete_child (child_process *cp) | |
158 | { | |
159 | int i; | |
160 | ||
161 | /* Should not be deleting a child that is still needed. */ | |
162 | for (i = 0; i < MAXDESC; i++) | |
163 | if (fd_info[i].cp == cp) | |
164 | abort (); | |
165 | ||
166 | if (!CHILD_ACTIVE (cp)) | |
167 | return; | |
168 | ||
169 | /* reap thread if necessary */ | |
170 | if (cp->thrd) | |
171 | { | |
172 | DWORD rc; | |
173 | ||
174 | if (GetExitCodeThread (cp->thrd, &rc) && rc == STILL_ACTIVE) | |
175 | { | |
176 | /* let the thread exit cleanly if possible */ | |
177 | cp->status = STATUS_READ_ERROR; | |
178 | SetEvent (cp->char_consumed); | |
179 | if (WaitForSingleObject (cp->thrd, 1000) != WAIT_OBJECT_0) | |
180 | { | |
181 | DebPrint (("delete_child.WaitForSingleObject (thread) failed " | |
182 | "with %lu for fd %ld\n", GetLastError (), cp->fd)); | |
183 | TerminateThread (cp->thrd, 0); | |
184 | } | |
185 | } | |
186 | CloseHandle (cp->thrd); | |
187 | cp->thrd = NULL; | |
188 | } | |
189 | if (cp->char_avail) | |
190 | { | |
191 | CloseHandle (cp->char_avail); | |
192 | cp->char_avail = NULL; | |
193 | } | |
194 | if (cp->char_consumed) | |
195 | { | |
196 | CloseHandle (cp->char_consumed); | |
197 | cp->char_consumed = NULL; | |
198 | } | |
199 | ||
200 | /* update child_proc_count (highest numbered slot in use plus one) */ | |
201 | if (cp == child_procs + child_proc_count - 1) | |
202 | { | |
203 | for (i = child_proc_count-1; i >= 0; i--) | |
204 | if (CHILD_ACTIVE (&child_procs[i])) | |
205 | { | |
206 | child_proc_count = i + 1; | |
207 | break; | |
208 | } | |
209 | } | |
210 | if (i < 0) | |
211 | child_proc_count = 0; | |
6cdfb6e6 RS |
212 | } |
213 | ||
214 | /* Find a child by pid. */ | |
215 | static child_process * | |
216 | find_child_pid (DWORD pid) | |
217 | { | |
218 | child_process *cp; | |
c519b5e1 | 219 | |
6cdfb6e6 RS |
220 | for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--) |
221 | if (CHILD_ACTIVE (cp) && pid == cp->pid) | |
222 | return cp; | |
223 | return NULL; | |
224 | } | |
225 | ||
6cdfb6e6 | 226 | |
c519b5e1 GV |
227 | /* Thread proc for child process and socket reader threads. Each thread |
228 | is normally blocked until woken by select() to check for input by | |
229 | reading one char. When the read completes, char_avail is signalled | |
230 | to wake up the select emulator and the thread blocks itself again. */ | |
6cdfb6e6 RS |
231 | DWORD WINAPI |
232 | reader_thread (void *arg) | |
233 | { | |
234 | child_process *cp; | |
235 | ||
236 | /* Our identity */ | |
237 | cp = (child_process *)arg; | |
238 | ||
239 | /* We have to wait for the go-ahead before we can start */ | |
c519b5e1 GV |
240 | if (cp == NULL || |
241 | WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0) | |
242 | return 1; | |
243 | ||
6cdfb6e6 RS |
244 | for (;;) |
245 | { | |
c519b5e1 GV |
246 | int rc; |
247 | ||
248 | rc = _sys_read_ahead (cp->fd); | |
249 | ||
250 | /* The name char_avail is a misnomer - it really just means the | |
251 | read-ahead has completed, whether successfully or not. */ | |
6cdfb6e6 RS |
252 | if (!SetEvent (cp->char_avail)) |
253 | { | |
254 | DebPrint (("reader_thread.SetEvent failed with %lu for fd %ld\n", | |
255 | GetLastError (), cp->fd)); | |
c519b5e1 GV |
256 | return 1; |
257 | } | |
258 | ||
259 | if (rc == STATUS_READ_ERROR) | |
260 | return 1; | |
6cdfb6e6 RS |
261 | |
262 | /* If the read died, the child has died so let the thread die */ | |
c519b5e1 | 263 | if (rc == STATUS_READ_FAILED) |
6cdfb6e6 RS |
264 | break; |
265 | ||
266 | /* Wait until our input is acknowledged before reading again */ | |
267 | if (WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0) | |
268 | { | |
269 | DebPrint (("reader_thread.WaitForSingleObject failed with " | |
270 | "%lu for fd %ld\n", GetLastError (), cp->fd)); | |
271 | break; | |
272 | } | |
273 | } | |
274 | return 0; | |
275 | } | |
276 | ||
277 | static BOOL | |
278 | create_child (char *exe, char *cmdline, char *env, | |
c519b5e1 | 279 | int * pPid, child_process *cp) |
6cdfb6e6 | 280 | { |
6cdfb6e6 RS |
281 | STARTUPINFO start; |
282 | SECURITY_ATTRIBUTES sec_attrs; | |
283 | SECURITY_DESCRIPTOR sec_desc; | |
284 | ||
c519b5e1 | 285 | if (cp == NULL) abort (); |
6cdfb6e6 RS |
286 | |
287 | memset (&start, 0, sizeof (start)); | |
288 | start.cb = sizeof (start); | |
289 | ||
58d4e829 | 290 | #ifdef HAVE_NTGUI |
fbd6baed | 291 | if (NILP (Vw32_start_process_show_window)) |
0ecf7d36 RS |
292 | start.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; |
293 | else | |
294 | start.dwFlags = STARTF_USESTDHANDLES; | |
58d4e829 GV |
295 | start.wShowWindow = SW_HIDE; |
296 | ||
297 | start.hStdInput = GetStdHandle (STD_INPUT_HANDLE); | |
298 | start.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE); | |
299 | start.hStdError = GetStdHandle (STD_ERROR_HANDLE); | |
300 | #endif /* HAVE_NTGUI */ | |
301 | ||
6cdfb6e6 RS |
302 | /* Explicitly specify no security */ |
303 | if (!InitializeSecurityDescriptor (&sec_desc, SECURITY_DESCRIPTOR_REVISION)) | |
c519b5e1 | 304 | goto EH_Fail; |
6cdfb6e6 | 305 | if (!SetSecurityDescriptorDacl (&sec_desc, TRUE, NULL, FALSE)) |
c519b5e1 | 306 | goto EH_Fail; |
6cdfb6e6 RS |
307 | sec_attrs.nLength = sizeof (sec_attrs); |
308 | sec_attrs.lpSecurityDescriptor = &sec_desc; | |
309 | sec_attrs.bInheritHandle = FALSE; | |
310 | ||
311 | if (!CreateProcess (exe, cmdline, &sec_attrs, NULL, TRUE, | |
c519b5e1 GV |
312 | CREATE_NEW_PROCESS_GROUP, |
313 | env, NULL, | |
314 | &start, &cp->procinfo)) | |
315 | goto EH_Fail; | |
316 | ||
317 | cp->pid = (int) cp->procinfo.dwProcessId; | |
318 | ||
319 | /* Hack for Windows 95, which assigns large (ie negative) pids */ | |
320 | if (cp->pid < 0) | |
321 | cp->pid = -cp->pid; | |
322 | ||
323 | /* pid must fit in a Lisp_Int */ | |
324 | cp->pid = (cp->pid & VALMASK); | |
325 | ||
326 | ||
327 | *pPid = cp->pid; | |
6cdfb6e6 RS |
328 | |
329 | return TRUE; | |
330 | ||
6cdfb6e6 | 331 | EH_Fail: |
c519b5e1 | 332 | DebPrint (("create_child.CreateProcess failed: %ld\n", GetLastError());); |
6cdfb6e6 RS |
333 | return FALSE; |
334 | } | |
335 | ||
336 | /* create_child doesn't know what emacs' file handle will be for waiting | |
337 | on output from the child, so we need to make this additional call | |
338 | to register the handle with the process | |
339 | This way the select emulator knows how to match file handles with | |
340 | entries in child_procs. */ | |
341 | void | |
342 | register_child (int pid, int fd) | |
343 | { | |
344 | child_process *cp; | |
345 | ||
346 | cp = find_child_pid (pid); | |
347 | if (cp == NULL) | |
348 | { | |
349 | DebPrint (("register_child unable to find pid %lu\n", pid)); | |
350 | return; | |
351 | } | |
352 | ||
353 | #ifdef FULL_DEBUG | |
354 | DebPrint (("register_child registered fd %d with pid %lu\n", fd, pid)); | |
355 | #endif | |
356 | ||
357 | cp->fd = fd; | |
6cdfb6e6 | 358 | |
c519b5e1 GV |
359 | /* thread is initially blocked until select is called; set status so |
360 | that select will release thread */ | |
361 | cp->status = STATUS_READ_ACKNOWLEDGED; | |
362 | ||
363 | /* attach child_process to fd_info */ | |
364 | if (fd_info[fd].cp != NULL) | |
6cdfb6e6 | 365 | { |
c519b5e1 GV |
366 | DebPrint (("register_child: fd_info[%d] apparently in use!\n", fd)); |
367 | abort (); | |
6cdfb6e6 | 368 | } |
c519b5e1 GV |
369 | |
370 | fd_info[fd].cp = cp; | |
6cdfb6e6 RS |
371 | } |
372 | ||
373 | /* When a process dies its pipe will break so the reader thread will | |
374 | signal failure to the select emulator. | |
375 | The select emulator then calls this routine to clean up. | |
376 | Since the thread signaled failure we can assume it is exiting. */ | |
377 | static void | |
c519b5e1 | 378 | reap_subprocess (child_process *cp) |
6cdfb6e6 | 379 | { |
c519b5e1 | 380 | if (cp->procinfo.hProcess) |
6cdfb6e6 | 381 | { |
c519b5e1 GV |
382 | /* Reap the process */ |
383 | if (WaitForSingleObject (cp->procinfo.hProcess, INFINITE) != WAIT_OBJECT_0) | |
384 | DebPrint (("reap_subprocess.WaitForSingleObject (process) failed " | |
385 | "with %lu for fd %ld\n", GetLastError (), cp->fd)); | |
386 | CloseHandle (cp->procinfo.hProcess); | |
387 | cp->procinfo.hProcess = NULL; | |
388 | CloseHandle (cp->procinfo.hThread); | |
389 | cp->procinfo.hThread = NULL; | |
817abdf6 KH |
390 | |
391 | /* If this was a DOS process, indicate that it is now safe to | |
57445e59 | 392 | start a new one. */ |
817abdf6 KH |
393 | if (cp->is_dos_process) |
394 | dos_process_running = FALSE; | |
6cdfb6e6 | 395 | } |
c519b5e1 GV |
396 | |
397 | /* For asynchronous children, the child_proc resources will be freed | |
398 | when the last pipe read descriptor is closed; for synchronous | |
399 | children, we must explicitly free the resources now because | |
400 | register_child has not been called. */ | |
401 | if (cp->fd == -1) | |
402 | delete_child (cp); | |
6cdfb6e6 RS |
403 | } |
404 | ||
405 | /* Wait for any of our existing child processes to die | |
406 | When it does, close its handle | |
407 | Return the pid and fill in the status if non-NULL. */ | |
22759c72 | 408 | |
6cdfb6e6 | 409 | int |
c519b5e1 | 410 | sys_wait (int *status) |
6cdfb6e6 RS |
411 | { |
412 | DWORD active, retval; | |
413 | int nh; | |
c519b5e1 | 414 | int pid; |
6cdfb6e6 RS |
415 | child_process *cp, *cps[MAX_CHILDREN]; |
416 | HANDLE wait_hnd[MAX_CHILDREN]; | |
417 | ||
418 | nh = 0; | |
419 | if (dead_child != NULL) | |
420 | { | |
421 | /* We want to wait for a specific child */ | |
c519b5e1 | 422 | wait_hnd[nh] = dead_child->procinfo.hProcess; |
6cdfb6e6 | 423 | cps[nh] = dead_child; |
c519b5e1 | 424 | if (!wait_hnd[nh]) abort (); |
6cdfb6e6 RS |
425 | nh++; |
426 | } | |
427 | else | |
428 | { | |
429 | for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--) | |
c519b5e1 GV |
430 | /* some child_procs might be sockets; ignore them */ |
431 | if (CHILD_ACTIVE (cp) && cp->procinfo.hProcess) | |
6cdfb6e6 | 432 | { |
c519b5e1 | 433 | wait_hnd[nh] = cp->procinfo.hProcess; |
6cdfb6e6 | 434 | cps[nh] = cp; |
c519b5e1 | 435 | if (!wait_hnd[nh]) abort (); |
6cdfb6e6 RS |
436 | nh++; |
437 | } | |
438 | } | |
439 | ||
440 | if (nh == 0) | |
441 | { | |
442 | /* Nothing to wait on, so fail */ | |
443 | errno = ECHILD; | |
444 | return -1; | |
445 | } | |
446 | ||
447 | active = WaitForMultipleObjects (nh, wait_hnd, FALSE, INFINITE); | |
448 | if (active == WAIT_FAILED) | |
449 | { | |
450 | errno = EBADF; | |
451 | return -1; | |
452 | } | |
453 | else if (active == WAIT_TIMEOUT) | |
454 | { | |
455 | /* Should never happen */ | |
456 | errno = EINVAL; | |
457 | return -1; | |
458 | } | |
459 | else if (active >= WAIT_OBJECT_0 && | |
460 | active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS) | |
461 | { | |
462 | active -= WAIT_OBJECT_0; | |
463 | } | |
464 | else if (active >= WAIT_ABANDONED_0 && | |
465 | active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS) | |
466 | { | |
467 | active -= WAIT_ABANDONED_0; | |
468 | } | |
469 | ||
470 | if (!GetExitCodeProcess (wait_hnd[active], &retval)) | |
471 | { | |
472 | DebPrint (("Wait.GetExitCodeProcess failed with %lu\n", | |
473 | GetLastError ())); | |
474 | retval = 1; | |
475 | } | |
476 | if (retval == STILL_ACTIVE) | |
477 | { | |
478 | /* Should never happen */ | |
479 | DebPrint (("Wait.WaitForMultipleObjects returned an active process\n")); | |
480 | errno = EINVAL; | |
481 | return -1; | |
482 | } | |
bc69349b RS |
483 | |
484 | /* Massage the exit code from the process to match the format expected | |
8e6208c5 | 485 | by the WIFSTOPPED et al macros in syswait.h. Only WIFSIGNALED and |
bc69349b RS |
486 | WIFEXITED are supported; WIFSTOPPED doesn't make sense under NT. */ |
487 | ||
488 | if (retval == STATUS_CONTROL_C_EXIT) | |
489 | retval = SIGINT; | |
490 | else | |
491 | retval <<= 8; | |
c519b5e1 | 492 | |
6cdfb6e6 | 493 | cp = cps[active]; |
c519b5e1 GV |
494 | pid = cp->pid; |
495 | #ifdef FULL_DEBUG | |
496 | DebPrint (("Wait signaled with process pid %d\n", cp->pid)); | |
497 | #endif | |
22759c72 | 498 | |
6cdfb6e6 RS |
499 | if (status) |
500 | { | |
22759c72 KH |
501 | *status = retval; |
502 | } | |
503 | else if (synch_process_alive) | |
504 | { | |
505 | synch_process_alive = 0; | |
22759c72 | 506 | |
3d7eead0 GV |
507 | /* Report the status of the synchronous process. */ |
508 | if (WIFEXITED (retval)) | |
509 | synch_process_retcode = WRETCODE (retval); | |
510 | else if (WIFSIGNALED (retval)) | |
511 | { | |
512 | int code = WTERMSIG (retval); | |
513 | char *signame = 0; | |
514 | ||
515 | if (code < NSIG) | |
516 | { | |
517 | /* Suppress warning if the table has const char *. */ | |
518 | signame = (char *) sys_siglist[code]; | |
519 | } | |
520 | if (signame == 0) | |
521 | signame = "unknown"; | |
522 | ||
523 | synch_process_death = signame; | |
524 | } | |
c519b5e1 GV |
525 | |
526 | reap_subprocess (cp); | |
6cdfb6e6 RS |
527 | } |
528 | ||
c519b5e1 | 529 | return pid; |
6cdfb6e6 RS |
530 | } |
531 | ||
817abdf6 | 532 | int |
fbd6baed | 533 | w32_is_dos_binary (char * filename) |
817abdf6 KH |
534 | { |
535 | IMAGE_DOS_HEADER dos_header; | |
536 | DWORD signature; | |
537 | int fd; | |
538 | int is_dos_binary = FALSE; | |
539 | ||
540 | fd = open (filename, O_RDONLY | O_BINARY, 0); | |
541 | if (fd >= 0) | |
542 | { | |
543 | char * p = strrchr (filename, '.'); | |
544 | ||
545 | /* We can only identify DOS .com programs from the extension. */ | |
546 | if (p && stricmp (p, ".com") == 0) | |
547 | is_dos_binary = TRUE; | |
548 | else if (p && stricmp (p, ".bat") == 0) | |
549 | { | |
550 | /* A DOS shell script - it appears that CreateProcess is happy | |
551 | to accept this (somewhat surprisingly); presumably it looks | |
552 | at COMSPEC to determine what executable to actually invoke. | |
553 | Therefore, we have to do the same here as well. */ | |
554 | p = getenv ("COMSPEC"); | |
555 | if (p) | |
fbd6baed | 556 | is_dos_binary = w32_is_dos_binary (p); |
817abdf6 KH |
557 | } |
558 | else | |
559 | { | |
560 | /* Look for DOS .exe signature - if found, we must also check | |
561 | that it isn't really a 16- or 32-bit Windows exe, since | |
562 | both formats start with a DOS program stub. Note that | |
563 | 16-bit Windows executables use the OS/2 1.x format. */ | |
564 | if (read (fd, &dos_header, sizeof (dos_header)) == sizeof (dos_header) | |
565 | && dos_header.e_magic == IMAGE_DOS_SIGNATURE | |
566 | && lseek (fd, dos_header.e_lfanew, SEEK_SET) != -1) | |
567 | { | |
568 | if (read (fd, &signature, sizeof (signature)) != sizeof (signature) | |
569 | || (signature != IMAGE_NT_SIGNATURE && | |
570 | LOWORD (signature) != IMAGE_OS2_SIGNATURE)) | |
571 | is_dos_binary = TRUE; | |
572 | } | |
573 | } | |
574 | close (fd); | |
575 | } | |
576 | ||
577 | return is_dos_binary; | |
578 | } | |
579 | ||
d9709fde GV |
580 | int |
581 | compare_env (const char **strp1, const char **strp2) | |
582 | { | |
583 | const char *str1 = *strp1, *str2 = *strp2; | |
584 | ||
585 | while (*str1 && *str2 && *str1 != '=' && *str2 != '=') | |
586 | { | |
587 | if (tolower (*str1) > tolower (*str2)) | |
588 | return 1; | |
589 | else if (tolower (*str1) < tolower (*str2)) | |
590 | return -1; | |
591 | str1++, str2++; | |
592 | } | |
593 | ||
594 | if (*str1 == '=' && *str2 == '=') | |
595 | return 0; | |
596 | else if (*str1 == '=') | |
597 | return -1; | |
598 | else | |
599 | return 1; | |
600 | } | |
601 | ||
602 | void | |
603 | merge_and_sort_env (char **envp1, char **envp2, char **new_envp) | |
604 | { | |
605 | char **optr, **nptr; | |
606 | int num; | |
607 | ||
608 | nptr = new_envp; | |
609 | optr = envp1; | |
610 | while (*optr) | |
611 | *nptr++ = *optr++; | |
612 | num = optr - envp1; | |
613 | ||
614 | optr = envp2; | |
615 | while (*optr) | |
616 | *nptr++ = *optr++; | |
617 | num += optr - envp2; | |
618 | ||
619 | qsort (new_envp, num, sizeof (char *), compare_env); | |
620 | ||
621 | *nptr = NULL; | |
622 | } | |
6cdfb6e6 RS |
623 | |
624 | /* When a new child process is created we need to register it in our list, | |
625 | so intercept spawn requests. */ | |
626 | int | |
c519b5e1 | 627 | sys_spawnve (int mode, char *cmdname, char **argv, char **envp) |
6cdfb6e6 | 628 | { |
0a4de642 | 629 | Lisp_Object program, full; |
6cdfb6e6 | 630 | char *cmdline, *env, *parg, **targ; |
d9709fde | 631 | int arglen, numenv; |
c519b5e1 GV |
632 | int pid; |
633 | child_process *cp; | |
817abdf6 | 634 | int is_dos_binary; |
d9709fde GV |
635 | /* We pass our process ID to our children by setting up an environment |
636 | variable in their environment. */ | |
637 | char ppid_env_var_buffer[64]; | |
638 | char *extra_env[] = {ppid_env_var_buffer, NULL}; | |
639 | ||
c519b5e1 GV |
640 | /* We don't care about the other modes */ |
641 | if (mode != _P_NOWAIT) | |
642 | { | |
643 | errno = EINVAL; | |
644 | return -1; | |
645 | } | |
0a4de642 RS |
646 | |
647 | /* Handle executable names without an executable suffix. */ | |
648 | program = make_string (cmdname, strlen (cmdname)); | |
649 | if (NILP (Ffile_executable_p (program))) | |
650 | { | |
651 | struct gcpro gcpro1; | |
652 | ||
653 | full = Qnil; | |
654 | GCPRO1 (program); | |
655 | openp (Vexec_path, program, EXEC_SUFFIXES, &full, 1); | |
656 | UNGCPRO; | |
657 | if (NILP (full)) | |
658 | { | |
659 | errno = EINVAL; | |
660 | return -1; | |
661 | } | |
662 | cmdname = XSTRING (full)->data; | |
663 | argv[0] = cmdname; | |
664 | } | |
665 | ||
c519b5e1 GV |
666 | /* make sure cmdname is in DOS format */ |
667 | strcpy (cmdname = alloca (strlen (cmdname) + 1), argv[0]); | |
668 | unixtodos_filename (cmdname); | |
669 | argv[0] = cmdname; | |
817abdf6 KH |
670 | |
671 | /* Check if program is a DOS executable, and if so whether we are | |
672 | allowed to start it. */ | |
fbd6baed | 673 | is_dos_binary = w32_is_dos_binary (cmdname); |
57445e59 | 674 | if (is_dos_binary && dos_process_running) |
817abdf6 | 675 | { |
de05443f | 676 | errno = EAGAIN; |
817abdf6 KH |
677 | return -1; |
678 | } | |
6cdfb6e6 RS |
679 | |
680 | /* we have to do some conjuring here to put argv and envp into the | |
681 | form CreateProcess wants... argv needs to be a space separated/null | |
682 | terminated list of parameters, and envp is a null | |
683 | separated/double-null terminated list of parameters. | |
c519b5e1 GV |
684 | |
685 | Additionally, zero-length args and args containing whitespace need | |
686 | to be wrapped in double quotes. Args containing embedded double | |
687 | quotes (as opposed to enclosing quotes, which we leave alone) are | |
fbd6baed | 688 | usually illegal (most W32 programs do not implement escaping of |
c519b5e1 GV |
689 | double quotes - sad but true, at least for programs compiled with |
690 | MSVC), but we will escape quotes anyway for those programs that can | |
fbd6baed | 691 | handle it. The W32 gcc library from Cygnus doubles quotes to |
c519b5e1 | 692 | escape them, so we will use that convention. |
6cdfb6e6 RS |
693 | |
694 | Since I have no idea how large argv and envp are likely to be | |
695 | we figure out list lengths on the fly and allocate them. */ | |
696 | ||
697 | /* do argv... */ | |
698 | arglen = 0; | |
699 | targ = argv; | |
700 | while (*targ) | |
701 | { | |
c519b5e1 GV |
702 | char * p = *targ; |
703 | int add_quotes = 0; | |
704 | ||
705 | if (*p == 0) | |
706 | add_quotes = 1; | |
707 | while (*p) | |
708 | if (*p++ == '"') | |
709 | { | |
710 | /* allow for embedded quotes to be doubled - we won't | |
711 | actually double quotes that aren't embedded though */ | |
712 | arglen++; | |
713 | add_quotes = 1; | |
714 | } | |
715 | else if (*p == ' ' || *p == '\t') | |
716 | add_quotes = 1; | |
717 | if (add_quotes) | |
718 | arglen += 2; | |
6cdfb6e6 RS |
719 | arglen += strlen (*targ++) + 1; |
720 | } | |
c519b5e1 | 721 | cmdline = alloca (arglen); |
6cdfb6e6 RS |
722 | targ = argv; |
723 | parg = cmdline; | |
724 | while (*targ) | |
725 | { | |
c519b5e1 GV |
726 | char * p = *targ; |
727 | int add_quotes = 0; | |
728 | ||
729 | if (*p == 0) | |
730 | add_quotes = 1; | |
93fdf2f8 | 731 | |
fbd6baed | 732 | if (!NILP (Vw32_quote_process_args)) |
93fdf2f8 RS |
733 | { |
734 | /* This is conditional because it sometimes causes more | |
735 | problems than it solves, since argv arrays are not always | |
736 | carefully constructed. M-x grep, for instance, passes the | |
737 | whole command line as one argument, so it becomes | |
738 | impossible to pass a regexp which contains spaces. */ | |
739 | for ( ; *p; p++) | |
740 | if (*p == ' ' || *p == '\t' || *p == '"') | |
741 | add_quotes = 1; | |
742 | } | |
c519b5e1 GV |
743 | if (add_quotes) |
744 | { | |
745 | char * first; | |
746 | char * last; | |
747 | ||
748 | p = *targ; | |
749 | first = p; | |
750 | last = p + strlen (p) - 1; | |
751 | *parg++ = '"'; | |
752 | while (*p) | |
753 | { | |
754 | if (*p == '"' && p > first && p < last) | |
755 | *parg++ = '"'; /* double up embedded quotes only */ | |
756 | *parg++ = *p++; | |
757 | } | |
758 | *parg++ = '"'; | |
759 | } | |
760 | else | |
761 | { | |
762 | strcpy (parg, *targ); | |
763 | parg += strlen (*targ); | |
764 | } | |
6cdfb6e6 | 765 | *parg++ = ' '; |
c519b5e1 | 766 | targ++; |
6cdfb6e6 RS |
767 | } |
768 | *--parg = '\0'; | |
769 | ||
770 | /* and envp... */ | |
771 | arglen = 1; | |
772 | targ = envp; | |
d9709fde | 773 | numenv = 1; /* for end null */ |
6cdfb6e6 RS |
774 | while (*targ) |
775 | { | |
776 | arglen += strlen (*targ++) + 1; | |
d9709fde | 777 | numenv++; |
6cdfb6e6 | 778 | } |
d9709fde | 779 | /* extra env vars... */ |
6cdfb6e6 RS |
780 | sprintf (ppid_env_var_buffer, "__PARENT_PROCESS_ID=%d", |
781 | GetCurrentProcessId ()); | |
782 | arglen += strlen (ppid_env_var_buffer) + 1; | |
d9709fde | 783 | numenv++; |
6cdfb6e6 | 784 | |
d9709fde GV |
785 | /* merge env passed in and extra env into one, and sort it. */ |
786 | targ = (char **) alloca (numenv * sizeof (char *)); | |
787 | merge_and_sort_env (envp, extra_env, targ); | |
788 | ||
789 | /* concatenate env entries. */ | |
c519b5e1 | 790 | env = alloca (arglen); |
6cdfb6e6 RS |
791 | parg = env; |
792 | while (*targ) | |
793 | { | |
794 | strcpy (parg, *targ); | |
795 | parg += strlen (*targ++); | |
796 | *parg++ = '\0'; | |
797 | } | |
6cdfb6e6 RS |
798 | *parg++ = '\0'; |
799 | *parg = '\0'; | |
c519b5e1 GV |
800 | |
801 | cp = new_child (); | |
802 | if (cp == NULL) | |
803 | { | |
804 | errno = EAGAIN; | |
805 | return -1; | |
806 | } | |
6cdfb6e6 RS |
807 | |
808 | /* Now create the process. */ | |
c519b5e1 | 809 | if (!create_child (cmdname, cmdline, env, &pid, cp)) |
6cdfb6e6 | 810 | { |
c519b5e1 | 811 | delete_child (cp); |
6cdfb6e6 | 812 | errno = ENOEXEC; |
c519b5e1 | 813 | return -1; |
6cdfb6e6 | 814 | } |
817abdf6 KH |
815 | |
816 | if (is_dos_binary) | |
817 | { | |
818 | cp->is_dos_process = TRUE; | |
819 | dos_process_running = TRUE; | |
820 | } | |
6cdfb6e6 | 821 | |
c519b5e1 | 822 | return pid; |
6cdfb6e6 RS |
823 | } |
824 | ||
825 | /* Emulate the select call | |
826 | Wait for available input on any of the given rfds, or timeout if | |
827 | a timeout is given and no input is detected | |
828 | wfds and efds are not supported and must be NULL. */ | |
829 | ||
830 | /* From ntterm.c */ | |
831 | extern HANDLE keyboard_handle; | |
832 | /* From process.c */ | |
833 | extern int proc_buffered_char[]; | |
834 | ||
835 | int | |
22759c72 KH |
836 | sys_select (int nfds, SELECT_TYPE *rfds, SELECT_TYPE *wfds, SELECT_TYPE *efds, |
837 | EMACS_TIME *timeout) | |
6cdfb6e6 RS |
838 | { |
839 | SELECT_TYPE orfds; | |
840 | DWORD timeout_ms; | |
841 | int i, nh, nr; | |
842 | DWORD active; | |
c519b5e1 GV |
843 | child_process *cp; |
844 | HANDLE wait_hnd[MAXDESC]; | |
845 | int fdindex[MAXDESC]; /* mapping from wait handles back to descriptors */ | |
6cdfb6e6 RS |
846 | |
847 | /* If the descriptor sets are NULL but timeout isn't, then just Sleep. */ | |
848 | if (rfds == NULL && wfds == NULL && efds == NULL && timeout != NULL) | |
849 | { | |
22759c72 | 850 | Sleep (timeout->tv_sec * 1000 + timeout->tv_usec / 1000); |
6cdfb6e6 RS |
851 | return 0; |
852 | } | |
853 | ||
854 | /* Otherwise, we only handle rfds, so fail otherwise. */ | |
855 | if (rfds == NULL || wfds != NULL || efds != NULL) | |
856 | { | |
857 | errno = EINVAL; | |
858 | return -1; | |
859 | } | |
860 | ||
861 | orfds = *rfds; | |
862 | FD_ZERO (rfds); | |
863 | nr = 0; | |
864 | ||
865 | /* Build a list of handles to wait on. */ | |
866 | nh = 0; | |
867 | for (i = 0; i < nfds; i++) | |
868 | if (FD_ISSET (i, &orfds)) | |
869 | { | |
870 | if (i == 0) | |
871 | { | |
c519b5e1 GV |
872 | if (keyboard_handle) |
873 | { | |
874 | /* Handle stdin specially */ | |
875 | wait_hnd[nh] = keyboard_handle; | |
876 | fdindex[nh] = i; | |
877 | nh++; | |
878 | } | |
6cdfb6e6 RS |
879 | |
880 | /* Check for any emacs-generated input in the queue since | |
881 | it won't be detected in the wait */ | |
882 | if (detect_input_pending ()) | |
883 | { | |
884 | FD_SET (i, rfds); | |
c519b5e1 | 885 | return 1; |
6cdfb6e6 RS |
886 | } |
887 | } | |
888 | else | |
889 | { | |
c519b5e1 GV |
890 | /* Child process and socket input */ |
891 | cp = fd_info[i].cp; | |
6cdfb6e6 RS |
892 | if (cp) |
893 | { | |
c519b5e1 GV |
894 | int current_status = cp->status; |
895 | ||
896 | if (current_status == STATUS_READ_ACKNOWLEDGED) | |
897 | { | |
898 | /* Tell reader thread which file handle to use. */ | |
899 | cp->fd = i; | |
900 | /* Wake up the reader thread for this process */ | |
901 | cp->status = STATUS_READ_READY; | |
902 | if (!SetEvent (cp->char_consumed)) | |
903 | DebPrint (("nt_select.SetEvent failed with " | |
904 | "%lu for fd %ld\n", GetLastError (), i)); | |
905 | } | |
906 | ||
907 | #ifdef CHECK_INTERLOCK | |
908 | /* slightly crude cross-checking of interlock between threads */ | |
909 | ||
910 | current_status = cp->status; | |
911 | if (WaitForSingleObject (cp->char_avail, 0) == WAIT_OBJECT_0) | |
912 | { | |
913 | /* char_avail has been signalled, so status (which may | |
914 | have changed) should indicate read has completed | |
915 | but has not been acknowledged. */ | |
916 | current_status = cp->status; | |
917 | if (current_status != STATUS_READ_SUCCEEDED && | |
918 | current_status != STATUS_READ_FAILED) | |
919 | DebPrint (("char_avail set, but read not completed: status %d\n", | |
920 | current_status)); | |
921 | } | |
922 | else | |
923 | { | |
924 | /* char_avail has not been signalled, so status should | |
925 | indicate that read is in progress; small possibility | |
926 | that read has completed but event wasn't yet signalled | |
927 | when we tested it (because a context switch occurred | |
928 | or if running on separate CPUs). */ | |
929 | if (current_status != STATUS_READ_READY && | |
930 | current_status != STATUS_READ_IN_PROGRESS && | |
931 | current_status != STATUS_READ_SUCCEEDED && | |
932 | current_status != STATUS_READ_FAILED) | |
933 | DebPrint (("char_avail reset, but read status is bad: %d\n", | |
934 | current_status)); | |
935 | } | |
936 | #endif | |
937 | wait_hnd[nh] = cp->char_avail; | |
938 | fdindex[nh] = i; | |
939 | if (!wait_hnd[nh]) abort (); | |
940 | nh++; | |
6cdfb6e6 RS |
941 | #ifdef FULL_DEBUG |
942 | DebPrint (("select waiting on child %d fd %d\n", | |
943 | cp-child_procs, i)); | |
944 | #endif | |
6cdfb6e6 RS |
945 | } |
946 | else | |
947 | { | |
c519b5e1 GV |
948 | /* Unable to find something to wait on for this fd, skip */ |
949 | DebPrint (("sys_select: fd %ld is invalid! ignoring\n", i)); | |
950 | abort (); | |
6cdfb6e6 RS |
951 | } |
952 | } | |
953 | } | |
954 | ||
955 | /* Nothing to look for, so we didn't find anything */ | |
956 | if (nh == 0) | |
957 | { | |
22759c72 | 958 | if (timeout) |
22759c72 | 959 | Sleep (timeout->tv_sec * 1000 + timeout->tv_usec / 1000); |
6cdfb6e6 RS |
960 | return 0; |
961 | } | |
6cdfb6e6 RS |
962 | |
963 | /* | |
964 | Wait for input | |
965 | If a child process dies while this is waiting, its pipe will break | |
966 | so the reader thread will signal an error condition, thus, the wait | |
967 | will wake up | |
968 | */ | |
22759c72 | 969 | timeout_ms = timeout ? (timeout->tv_sec * 1000 + timeout->tv_usec / 1000) : INFINITE; |
c519b5e1 | 970 | |
6cdfb6e6 | 971 | active = WaitForMultipleObjects (nh, wait_hnd, FALSE, timeout_ms); |
c519b5e1 | 972 | |
6cdfb6e6 RS |
973 | if (active == WAIT_FAILED) |
974 | { | |
975 | DebPrint (("select.WaitForMultipleObjects (%d, %lu) failed with %lu\n", | |
976 | nh, timeout_ms, GetLastError ())); | |
c519b5e1 GV |
977 | /* don't return EBADF - this causes wait_reading_process_input to |
978 | abort; WAIT_FAILED is returned when single-stepping under | |
979 | Windows 95 after switching thread focus in debugger, and | |
980 | possibly at other times. */ | |
981 | errno = EINTR; | |
6cdfb6e6 RS |
982 | return -1; |
983 | } | |
984 | else if (active == WAIT_TIMEOUT) | |
985 | { | |
986 | return 0; | |
987 | } | |
988 | else if (active >= WAIT_OBJECT_0 && | |
989 | active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS) | |
990 | { | |
991 | active -= WAIT_OBJECT_0; | |
992 | } | |
993 | else if (active >= WAIT_ABANDONED_0 && | |
994 | active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS) | |
995 | { | |
996 | active -= WAIT_ABANDONED_0; | |
997 | } | |
6cdfb6e6 | 998 | |
c519b5e1 GV |
999 | /* Loop over all handles after active (now officially documented as |
1000 | being the first signalled handle in the array). We do this to | |
1001 | ensure fairness, so that all channels with data available will be | |
1002 | processed - otherwise higher numbered channels could be starved. */ | |
1003 | do | |
6cdfb6e6 | 1004 | { |
c519b5e1 GV |
1005 | if (fdindex[active] == 0) |
1006 | { | |
1007 | /* Keyboard input available */ | |
1008 | FD_SET (0, rfds); | |
6cdfb6e6 | 1009 | nr++; |
c519b5e1 | 1010 | } |
6cdfb6e6 | 1011 | else |
c519b5e1 GV |
1012 | { |
1013 | /* must be a socket or pipe */ | |
1014 | int current_status; | |
1015 | ||
1016 | cp = fd_info[ fdindex[active] ].cp; | |
1017 | ||
1018 | /* Read ahead should have completed, either succeeding or failing. */ | |
1019 | FD_SET (fdindex[active], rfds); | |
1020 | nr++; | |
1021 | current_status = cp->status; | |
1022 | if (current_status != STATUS_READ_SUCCEEDED) | |
1023 | { | |
1024 | if (current_status != STATUS_READ_FAILED) | |
1025 | DebPrint (("internal error: subprocess pipe signalled " | |
1026 | "at the wrong time (status %d)\n!", current_status)); | |
1027 | ||
1028 | /* The child_process entry for a socket or pipe will be | |
1029 | freed when the last descriptor using it is closed; for | |
1030 | pipes, we call the SIGCHLD handler. */ | |
1031 | if (fd_info[ fdindex[active] ].flags & FILE_PIPE) | |
1032 | { | |
1033 | /* The SIGCHLD handler will do a Wait so we know it won't | |
1034 | return until the process is dead | |
1035 | We force Wait to only wait for this process to avoid it | |
1036 | picking up other children that happen to be dead but that | |
1037 | we haven't noticed yet | |
1038 | SIG_DFL for SIGCHLD is ignore? */ | |
1039 | if (sig_handlers[SIGCHLD] != SIG_DFL && | |
1040 | sig_handlers[SIGCHLD] != SIG_IGN) | |
1041 | { | |
6cdfb6e6 | 1042 | #ifdef FULL_DEBUG |
c519b5e1 GV |
1043 | DebPrint (("select calling SIGCHLD handler for pid %d\n", |
1044 | cp->pid)); | |
6cdfb6e6 | 1045 | #endif |
c519b5e1 GV |
1046 | dead_child = cp; |
1047 | sig_handlers[SIGCHLD] (SIGCHLD); | |
1048 | dead_child = NULL; | |
1049 | } | |
1050 | ||
1051 | /* Clean up the child process entry in the table */ | |
1052 | reap_subprocess (cp); | |
1053 | } | |
1054 | } | |
1055 | } | |
1056 | ||
1057 | /* Test for input on remaining channels. */ | |
1058 | while (++active < nh) | |
1059 | if (WaitForSingleObject (wait_hnd[active], 0) == WAIT_OBJECT_0) | |
1060 | break; | |
1061 | } while (active < nh); | |
1062 | ||
6cdfb6e6 RS |
1063 | return nr; |
1064 | } | |
1065 | ||
c519b5e1 | 1066 | /* Substitute for certain kill () operations */ |
6cdfb6e6 | 1067 | int |
c519b5e1 | 1068 | sys_kill (int pid, int sig) |
6cdfb6e6 RS |
1069 | { |
1070 | child_process *cp; | |
c519b5e1 GV |
1071 | HANDLE proc_hand; |
1072 | int need_to_free = 0; | |
1073 | int rc = 0; | |
6cdfb6e6 RS |
1074 | |
1075 | /* Only handle signals that will result in the process dying */ | |
1076 | if (sig != SIGINT && sig != SIGKILL && sig != SIGQUIT && sig != SIGHUP) | |
1077 | { | |
1078 | errno = EINVAL; | |
1079 | return -1; | |
1080 | } | |
c519b5e1 | 1081 | |
6cdfb6e6 RS |
1082 | cp = find_child_pid (pid); |
1083 | if (cp == NULL) | |
1084 | { | |
c519b5e1 GV |
1085 | proc_hand = OpenProcess (PROCESS_TERMINATE, 0, pid); |
1086 | if (proc_hand == NULL) | |
1087 | { | |
1088 | errno = EPERM; | |
1089 | return -1; | |
1090 | } | |
1091 | need_to_free = 1; | |
1092 | } | |
1093 | else | |
1094 | { | |
1095 | proc_hand = cp->procinfo.hProcess; | |
1096 | pid = cp->procinfo.dwProcessId; | |
6cdfb6e6 RS |
1097 | } |
1098 | ||
1099 | if (sig == SIGINT) | |
1100 | { | |
c519b5e1 | 1101 | /* Ctrl-Break is NT equivalent of SIGINT. */ |
6cdfb6e6 RS |
1102 | if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid)) |
1103 | { | |
c519b5e1 | 1104 | DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d " |
6cdfb6e6 RS |
1105 | "for pid %lu\n", GetLastError (), pid)); |
1106 | errno = EINVAL; | |
c519b5e1 | 1107 | rc = -1; |
6cdfb6e6 RS |
1108 | } |
1109 | } | |
1110 | else | |
1111 | { | |
fbd6baed | 1112 | /* Kill the process. On W32 this doesn't kill child processes |
8eae7766 RS |
1113 | so it doesn't work very well for shells which is why it's not |
1114 | used in every case. Also, don't try to terminate DOS processes | |
e9e23e23 | 1115 | (on Windows 95), because this will hang Emacs. */ |
8eae7766 RS |
1116 | if (!(cp && cp->is_dos_process) |
1117 | && !TerminateProcess (proc_hand, 0xff)) | |
6cdfb6e6 | 1118 | { |
c519b5e1 | 1119 | DebPrint (("sys_kill.TerminateProcess returned %d " |
6cdfb6e6 RS |
1120 | "for pid %lu\n", GetLastError (), pid)); |
1121 | errno = EINVAL; | |
c519b5e1 | 1122 | rc = -1; |
6cdfb6e6 RS |
1123 | } |
1124 | } | |
c519b5e1 GV |
1125 | |
1126 | if (need_to_free) | |
1127 | CloseHandle (proc_hand); | |
1128 | ||
1129 | return rc; | |
6cdfb6e6 RS |
1130 | } |
1131 | ||
c519b5e1 GV |
1132 | extern int report_file_error (char *, Lisp_Object); |
1133 | ||
1134 | /* The following two routines are used to manipulate stdin, stdout, and | |
1135 | stderr of our child processes. | |
1136 | ||
1137 | Assuming that in, out, and err are *not* inheritable, we make them | |
1138 | stdin, stdout, and stderr of the child as follows: | |
1139 | ||
1140 | - Save the parent's current standard handles. | |
1141 | - Set the std handles to inheritable duplicates of the ones being passed in. | |
1142 | (Note that _get_osfhandle() is an io.h procedure that retrieves the | |
1143 | NT file handle for a crt file descriptor.) | |
1144 | - Spawn the child, which inherits in, out, and err as stdin, | |
1145 | stdout, and stderr. (see Spawnve) | |
1146 | - Close the std handles passed to the child. | |
1147 | - Reset the parent's standard handles to the saved handles. | |
1148 | (see reset_standard_handles) | |
1149 | We assume that the caller closes in, out, and err after calling us. */ | |
1150 | ||
1151 | void | |
1152 | prepare_standard_handles (int in, int out, int err, HANDLE handles[3]) | |
6cdfb6e6 | 1153 | { |
c519b5e1 GV |
1154 | HANDLE parent; |
1155 | HANDLE newstdin, newstdout, newstderr; | |
1156 | ||
1157 | parent = GetCurrentProcess (); | |
1158 | ||
1159 | handles[0] = GetStdHandle (STD_INPUT_HANDLE); | |
1160 | handles[1] = GetStdHandle (STD_OUTPUT_HANDLE); | |
1161 | handles[2] = GetStdHandle (STD_ERROR_HANDLE); | |
1162 | ||
1163 | /* make inheritable copies of the new handles */ | |
1164 | if (!DuplicateHandle (parent, | |
1165 | (HANDLE) _get_osfhandle (in), | |
1166 | parent, | |
1167 | &newstdin, | |
1168 | 0, | |
1169 | TRUE, | |
1170 | DUPLICATE_SAME_ACCESS)) | |
1171 | report_file_error ("Duplicating input handle for child", Qnil); | |
6cdfb6e6 | 1172 | |
c519b5e1 GV |
1173 | if (!DuplicateHandle (parent, |
1174 | (HANDLE) _get_osfhandle (out), | |
1175 | parent, | |
1176 | &newstdout, | |
1177 | 0, | |
1178 | TRUE, | |
1179 | DUPLICATE_SAME_ACCESS)) | |
1180 | report_file_error ("Duplicating output handle for child", Qnil); | |
6cdfb6e6 | 1181 | |
c519b5e1 GV |
1182 | if (!DuplicateHandle (parent, |
1183 | (HANDLE) _get_osfhandle (err), | |
1184 | parent, | |
1185 | &newstderr, | |
1186 | 0, | |
1187 | TRUE, | |
1188 | DUPLICATE_SAME_ACCESS)) | |
1189 | report_file_error ("Duplicating error handle for child", Qnil); | |
1190 | ||
1191 | /* and store them as our std handles */ | |
1192 | if (!SetStdHandle (STD_INPUT_HANDLE, newstdin)) | |
1193 | report_file_error ("Changing stdin handle", Qnil); | |
6cdfb6e6 | 1194 | |
c519b5e1 GV |
1195 | if (!SetStdHandle (STD_OUTPUT_HANDLE, newstdout)) |
1196 | report_file_error ("Changing stdout handle", Qnil); | |
1197 | ||
1198 | if (!SetStdHandle (STD_ERROR_HANDLE, newstderr)) | |
1199 | report_file_error ("Changing stderr handle", Qnil); | |
1200 | } | |
1201 | ||
1202 | void | |
1203 | reset_standard_handles (int in, int out, int err, HANDLE handles[3]) | |
1204 | { | |
1205 | /* close the duplicated handles passed to the child */ | |
1206 | CloseHandle (GetStdHandle (STD_INPUT_HANDLE)); | |
1207 | CloseHandle (GetStdHandle (STD_OUTPUT_HANDLE)); | |
1208 | CloseHandle (GetStdHandle (STD_ERROR_HANDLE)); | |
1209 | ||
1210 | /* now restore parent's saved std handles */ | |
1211 | SetStdHandle (STD_INPUT_HANDLE, handles[0]); | |
1212 | SetStdHandle (STD_OUTPUT_HANDLE, handles[1]); | |
1213 | SetStdHandle (STD_ERROR_HANDLE, handles[2]); | |
6cdfb6e6 | 1214 | } |
c519b5e1 | 1215 | |
a11e68d0 RS |
1216 | #ifdef HAVE_SOCKETS |
1217 | ||
1218 | /* To avoid problems with winsock implementations that work over dial-up | |
1219 | connections causing or requiring a connection to exist while Emacs is | |
1220 | running, Emacs no longer automatically loads winsock on startup if it | |
1221 | is present. Instead, it will be loaded when open-network-stream is | |
1222 | first called. | |
1223 | ||
1224 | To allow full control over when winsock is loaded, we provide these | |
1225 | two functions to dynamically load and unload winsock. This allows | |
1226 | dial-up users to only be connected when they actually need to use | |
1227 | socket services. */ | |
1228 | ||
1229 | /* From nt.c */ | |
1230 | extern HANDLE winsock_lib; | |
1231 | extern BOOL term_winsock (void); | |
1232 | extern BOOL init_winsock (int load_now); | |
1233 | ||
1234 | extern Lisp_Object Vsystem_name; | |
1235 | ||
fbd6baed | 1236 | DEFUN ("w32-has-winsock", Fw32_has_winsock, Sw32_has_winsock, 0, 1, 0, |
a11e68d0 RS |
1237 | "Test for presence of the Windows socket library `winsock'.\n\ |
1238 | Returns non-nil if winsock support is present, nil otherwise.\n\ | |
1239 | \n\ | |
1240 | If the optional argument LOAD-NOW is non-nil, the winsock library is\n\ | |
1241 | also loaded immediately if not already loaded. If winsock is loaded,\n\ | |
1242 | the winsock local hostname is returned (since this may be different from\n\ | |
1243 | the value of `system-name' and should supplant it), otherwise t is\n\ | |
1244 | returned to indicate winsock support is present.") | |
1245 | (load_now) | |
1246 | Lisp_Object load_now; | |
1247 | { | |
1248 | int have_winsock; | |
1249 | ||
1250 | have_winsock = init_winsock (!NILP (load_now)); | |
1251 | if (have_winsock) | |
1252 | { | |
1253 | if (winsock_lib != NULL) | |
1254 | { | |
1255 | /* Return new value for system-name. The best way to do this | |
1256 | is to call init_system_name, saving and restoring the | |
1257 | original value to avoid side-effects. */ | |
1258 | Lisp_Object orig_hostname = Vsystem_name; | |
1259 | Lisp_Object hostname; | |
1260 | ||
1261 | init_system_name (); | |
1262 | hostname = Vsystem_name; | |
1263 | Vsystem_name = orig_hostname; | |
1264 | return hostname; | |
1265 | } | |
1266 | return Qt; | |
1267 | } | |
1268 | return Qnil; | |
1269 | } | |
1270 | ||
fbd6baed | 1271 | DEFUN ("w32-unload-winsock", Fw32_unload_winsock, Sw32_unload_winsock, |
a11e68d0 RS |
1272 | 0, 0, 0, |
1273 | "Unload the Windows socket library `winsock' if loaded.\n\ | |
1274 | This is provided to allow dial-up socket connections to be disconnected\n\ | |
1275 | when no longer needed. Returns nil without unloading winsock if any\n\ | |
1276 | socket connections still exist.") | |
1277 | () | |
1278 | { | |
1279 | return term_winsock () ? Qt : Qnil; | |
1280 | } | |
1281 | ||
1282 | #endif /* HAVE_SOCKETS */ | |
1283 | ||
93fdf2f8 RS |
1284 | \f |
1285 | syms_of_ntproc () | |
1286 | { | |
a11e68d0 | 1287 | #ifdef HAVE_SOCKETS |
fbd6baed GV |
1288 | defsubr (&Sw32_has_winsock); |
1289 | defsubr (&Sw32_unload_winsock); | |
a11e68d0 RS |
1290 | #endif |
1291 | ||
fbd6baed | 1292 | DEFVAR_LISP ("w32-quote-process-args", &Vw32_quote_process_args, |
93fdf2f8 RS |
1293 | "Non-nil enables quoting of process arguments to ensure correct parsing.\n\ |
1294 | Because Windows does not directly pass argv arrays to child processes,\n\ | |
1295 | programs have to reconstruct the argv array by parsing the command\n\ | |
1296 | line string. For an argument to contain a space, it must be enclosed\n\ | |
1297 | in double quotes or it will be parsed as multiple arguments.\n\ | |
1298 | \n\ | |
1299 | However, the argument list to call-process is not always correctly\n\ | |
1300 | constructed (or arguments have already been quoted), so enabling this\n\ | |
1301 | option may cause unexpected behavior."); | |
fbd6baed | 1302 | Vw32_quote_process_args = Qnil; |
817abdf6 | 1303 | |
fbd6baed GV |
1304 | DEFVAR_LISP ("w32-start-process-show-window", |
1305 | &Vw32_start_process_show_window, | |
0ecf7d36 RS |
1306 | "When nil, processes started via start-process hide their windows.\n\ |
1307 | When non-nil, they show their window in the method of their choice."); | |
fbd6baed | 1308 | Vw32_start_process_show_window = Qnil; |
0ecf7d36 | 1309 | |
fbd6baed | 1310 | DEFVAR_INT ("w32-pipe-read-delay", &Vw32_pipe_read_delay, |
817abdf6 KH |
1311 | "Forced delay before reading subprocess output.\n\ |
1312 | This is done to improve the buffering of subprocess output, by\n\ | |
1313 | avoiding the inefficiency of frequently reading small amounts of data.\n\ | |
1314 | \n\ | |
1315 | If positive, the value is the number of milliseconds to sleep before\n\ | |
1316 | reading the subprocess output. If negative, the magnitude is the number\n\ | |
1317 | of time slices to wait (effectively boosting the priority of the child\n\ | |
1318 | process temporarily). A value of zero disables waiting entirely."); | |
fbd6baed | 1319 | Vw32_pipe_read_delay = 50; |
0c04091e | 1320 | |
fbd6baed | 1321 | DEFVAR_LISP ("w32-downcase-file-names", &Vw32_downcase_file_names, |
0c04091e RS |
1322 | "Non-nil means convert all-upper case file names to lower case.\n\ |
1323 | This applies when performing completions and file name expansion."); | |
fbd6baed | 1324 | Vw32_downcase_file_names = Qnil; |
93fdf2f8 | 1325 | } |
c519b5e1 | 1326 | /* end of ntproc.c */ |