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" |
b2fc9f3d | 44 | #include "w32heap.h" |
6cdfb6e6 | 45 | #include "systime.h" |
3d7eead0 GV |
46 | #include "syswait.h" |
47 | #include "process.h" | |
48 | ||
93fdf2f8 RS |
49 | /* Control whether spawnve quotes arguments as necessary to ensure |
50 | correct parsing by child process. Because not all uses of spawnve | |
51 | are careful about constructing argv arrays, we make this behaviour | |
52 | conditional (off by default). */ | |
fbd6baed | 53 | Lisp_Object Vw32_quote_process_args; |
93fdf2f8 | 54 | |
0ecf7d36 RS |
55 | /* Control whether create_child causes the process' window to be |
56 | hidden. The default is nil. */ | |
fbd6baed | 57 | Lisp_Object Vw32_start_process_show_window; |
0ecf7d36 | 58 | |
b2fc9f3d GV |
59 | /* Control whether create_child causes the process to inherit Emacs' |
60 | console window, or be given a new one of its own. The default is | |
61 | nil, to allow multiple DOS programs to run on Win95. Having separate | |
62 | consoles also allows Emacs to cleanly terminate process groups. */ | |
63 | Lisp_Object Vw32_start_process_share_console; | |
64 | ||
817abdf6 KH |
65 | /* Time to sleep before reading from a subprocess output pipe - this |
66 | avoids the inefficiency of frequently reading small amounts of data. | |
67 | This is primarily necessary for handling DOS processes on Windows 95, | |
e9e23e23 | 68 | but is useful for W32 processes on both Windows 95 and NT as well. */ |
fbd6baed | 69 | Lisp_Object Vw32_pipe_read_delay; |
817abdf6 | 70 | |
0c04091e RS |
71 | /* Control conversion of upper case file names to lower case. |
72 | nil means no, t means yes. */ | |
fbd6baed | 73 | Lisp_Object Vw32_downcase_file_names; |
0c04091e | 74 | |
b2fc9f3d GV |
75 | /* Control whether stat() attempts to generate fake but hopefully |
76 | "accurate" inode values, by hashing the absolute truenames of files. | |
77 | This should detect aliasing between long and short names, but still | |
78 | allows the possibility of hash collisions. */ | |
79 | Lisp_Object Vw32_generate_fake_inodes; | |
80 | ||
81 | /* Control whether stat() attempts to determine file type and link count | |
82 | exactly, at the expense of slower operation. Since true hard links | |
83 | are supported on NTFS volumes, this is only relevant on NT. */ | |
84 | Lisp_Object Vw32_get_true_file_attributes; | |
85 | ||
86 | Lisp_Object Qhigh, Qlow; | |
817abdf6 | 87 | |
3d7eead0 GV |
88 | #ifndef SYS_SIGLIST_DECLARED |
89 | extern char *sys_siglist[]; | |
90 | #endif | |
6cdfb6e6 | 91 | |
6cdfb6e6 | 92 | #ifdef EMACSDEBUG |
c519b5e1 | 93 | void _DebPrint (const char *fmt, ...) |
6cdfb6e6 | 94 | { |
c519b5e1 | 95 | char buf[1024]; |
6cdfb6e6 RS |
96 | va_list args; |
97 | ||
98 | va_start (args, fmt); | |
99 | vsprintf (buf, fmt, args); | |
100 | va_end (args); | |
101 | OutputDebugString (buf); | |
102 | } | |
103 | #endif | |
104 | ||
c519b5e1 | 105 | typedef void (_CALLBACK_ *signal_handler)(int); |
6cdfb6e6 RS |
106 | |
107 | /* Signal handlers...SIG_DFL == 0 so this is initialized correctly. */ | |
108 | static signal_handler sig_handlers[NSIG]; | |
109 | ||
110 | /* Fake signal implementation to record the SIGCHLD handler. */ | |
111 | signal_handler | |
c519b5e1 | 112 | sys_signal (int sig, signal_handler handler) |
6cdfb6e6 RS |
113 | { |
114 | signal_handler old; | |
115 | ||
116 | if (sig != SIGCHLD) | |
117 | { | |
118 | errno = EINVAL; | |
119 | return SIG_ERR; | |
120 | } | |
121 | old = sig_handlers[sig]; | |
122 | sig_handlers[sig] = handler; | |
123 | return old; | |
124 | } | |
125 | ||
c519b5e1 GV |
126 | /* Defined in <process.h> which conflicts with the local copy */ |
127 | #define _P_NOWAIT 1 | |
128 | ||
129 | /* Child process management list. */ | |
130 | int child_proc_count = 0; | |
131 | child_process child_procs[ MAX_CHILDREN ]; | |
132 | child_process *dead_child = NULL; | |
133 | ||
134 | DWORD WINAPI reader_thread (void *arg); | |
135 | ||
6cdfb6e6 | 136 | /* Find an unused process slot. */ |
c519b5e1 | 137 | child_process * |
6cdfb6e6 RS |
138 | new_child (void) |
139 | { | |
140 | child_process *cp; | |
c519b5e1 | 141 | DWORD id; |
6cdfb6e6 RS |
142 | |
143 | for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--) | |
144 | if (!CHILD_ACTIVE (cp)) | |
c519b5e1 GV |
145 | goto Initialise; |
146 | if (child_proc_count == MAX_CHILDREN) | |
147 | return NULL; | |
148 | cp = &child_procs[child_proc_count++]; | |
149 | ||
150 | Initialise: | |
151 | memset (cp, 0, sizeof(*cp)); | |
152 | cp->fd = -1; | |
153 | cp->pid = -1; | |
154 | cp->procinfo.hProcess = NULL; | |
155 | cp->status = STATUS_READ_ERROR; | |
156 | ||
157 | /* use manual reset event so that select() will function properly */ | |
158 | cp->char_avail = CreateEvent (NULL, TRUE, FALSE, NULL); | |
159 | if (cp->char_avail) | |
160 | { | |
161 | cp->char_consumed = CreateEvent (NULL, FALSE, FALSE, NULL); | |
162 | if (cp->char_consumed) | |
163 | { | |
164 | cp->thrd = CreateThread (NULL, 1024, reader_thread, cp, 0, &id); | |
165 | if (cp->thrd) | |
166 | return cp; | |
167 | } | |
168 | } | |
169 | delete_child (cp); | |
170 | return NULL; | |
171 | } | |
172 | ||
173 | void | |
174 | delete_child (child_process *cp) | |
175 | { | |
176 | int i; | |
177 | ||
178 | /* Should not be deleting a child that is still needed. */ | |
179 | for (i = 0; i < MAXDESC; i++) | |
180 | if (fd_info[i].cp == cp) | |
181 | abort (); | |
182 | ||
183 | if (!CHILD_ACTIVE (cp)) | |
184 | return; | |
185 | ||
186 | /* reap thread if necessary */ | |
187 | if (cp->thrd) | |
188 | { | |
189 | DWORD rc; | |
190 | ||
191 | if (GetExitCodeThread (cp->thrd, &rc) && rc == STILL_ACTIVE) | |
192 | { | |
193 | /* let the thread exit cleanly if possible */ | |
194 | cp->status = STATUS_READ_ERROR; | |
195 | SetEvent (cp->char_consumed); | |
196 | if (WaitForSingleObject (cp->thrd, 1000) != WAIT_OBJECT_0) | |
197 | { | |
198 | DebPrint (("delete_child.WaitForSingleObject (thread) failed " | |
199 | "with %lu for fd %ld\n", GetLastError (), cp->fd)); | |
200 | TerminateThread (cp->thrd, 0); | |
201 | } | |
202 | } | |
203 | CloseHandle (cp->thrd); | |
204 | cp->thrd = NULL; | |
205 | } | |
206 | if (cp->char_avail) | |
207 | { | |
208 | CloseHandle (cp->char_avail); | |
209 | cp->char_avail = NULL; | |
210 | } | |
211 | if (cp->char_consumed) | |
212 | { | |
213 | CloseHandle (cp->char_consumed); | |
214 | cp->char_consumed = NULL; | |
215 | } | |
216 | ||
217 | /* update child_proc_count (highest numbered slot in use plus one) */ | |
218 | if (cp == child_procs + child_proc_count - 1) | |
219 | { | |
220 | for (i = child_proc_count-1; i >= 0; i--) | |
221 | if (CHILD_ACTIVE (&child_procs[i])) | |
222 | { | |
223 | child_proc_count = i + 1; | |
224 | break; | |
225 | } | |
226 | } | |
227 | if (i < 0) | |
228 | child_proc_count = 0; | |
6cdfb6e6 RS |
229 | } |
230 | ||
231 | /* Find a child by pid. */ | |
232 | static child_process * | |
233 | find_child_pid (DWORD pid) | |
234 | { | |
235 | child_process *cp; | |
c519b5e1 | 236 | |
6cdfb6e6 RS |
237 | for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--) |
238 | if (CHILD_ACTIVE (cp) && pid == cp->pid) | |
239 | return cp; | |
240 | return NULL; | |
241 | } | |
242 | ||
6cdfb6e6 | 243 | |
c519b5e1 GV |
244 | /* Thread proc for child process and socket reader threads. Each thread |
245 | is normally blocked until woken by select() to check for input by | |
246 | reading one char. When the read completes, char_avail is signalled | |
247 | to wake up the select emulator and the thread blocks itself again. */ | |
6cdfb6e6 RS |
248 | DWORD WINAPI |
249 | reader_thread (void *arg) | |
250 | { | |
251 | child_process *cp; | |
252 | ||
253 | /* Our identity */ | |
254 | cp = (child_process *)arg; | |
255 | ||
256 | /* We have to wait for the go-ahead before we can start */ | |
b2fc9f3d GV |
257 | if (cp == NULL |
258 | || WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0) | |
c519b5e1 GV |
259 | return 1; |
260 | ||
6cdfb6e6 RS |
261 | for (;;) |
262 | { | |
c519b5e1 GV |
263 | int rc; |
264 | ||
265 | rc = _sys_read_ahead (cp->fd); | |
266 | ||
267 | /* The name char_avail is a misnomer - it really just means the | |
268 | read-ahead has completed, whether successfully or not. */ | |
6cdfb6e6 RS |
269 | if (!SetEvent (cp->char_avail)) |
270 | { | |
271 | DebPrint (("reader_thread.SetEvent failed with %lu for fd %ld\n", | |
272 | GetLastError (), cp->fd)); | |
c519b5e1 GV |
273 | return 1; |
274 | } | |
275 | ||
276 | if (rc == STATUS_READ_ERROR) | |
277 | return 1; | |
6cdfb6e6 RS |
278 | |
279 | /* If the read died, the child has died so let the thread die */ | |
c519b5e1 | 280 | if (rc == STATUS_READ_FAILED) |
6cdfb6e6 RS |
281 | break; |
282 | ||
283 | /* Wait until our input is acknowledged before reading again */ | |
284 | if (WaitForSingleObject (cp->char_consumed, INFINITE) != WAIT_OBJECT_0) | |
285 | { | |
286 | DebPrint (("reader_thread.WaitForSingleObject failed with " | |
287 | "%lu for fd %ld\n", GetLastError (), cp->fd)); | |
288 | break; | |
289 | } | |
290 | } | |
291 | return 0; | |
292 | } | |
293 | ||
b2fc9f3d GV |
294 | /* To avoid Emacs changing directory, we just record here the directory |
295 | the new process should start in. This is set just before calling | |
296 | sys_spawnve, and is not generally valid at any other time. */ | |
297 | static char * process_dir; | |
298 | ||
6cdfb6e6 RS |
299 | static BOOL |
300 | create_child (char *exe, char *cmdline, char *env, | |
c519b5e1 | 301 | int * pPid, child_process *cp) |
6cdfb6e6 | 302 | { |
6cdfb6e6 RS |
303 | STARTUPINFO start; |
304 | SECURITY_ATTRIBUTES sec_attrs; | |
305 | SECURITY_DESCRIPTOR sec_desc; | |
b2fc9f3d | 306 | char dir[ MAXPATHLEN ]; |
6cdfb6e6 | 307 | |
c519b5e1 | 308 | if (cp == NULL) abort (); |
6cdfb6e6 RS |
309 | |
310 | memset (&start, 0, sizeof (start)); | |
311 | start.cb = sizeof (start); | |
312 | ||
58d4e829 | 313 | #ifdef HAVE_NTGUI |
fbd6baed | 314 | if (NILP (Vw32_start_process_show_window)) |
0ecf7d36 RS |
315 | start.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; |
316 | else | |
317 | start.dwFlags = STARTF_USESTDHANDLES; | |
58d4e829 GV |
318 | start.wShowWindow = SW_HIDE; |
319 | ||
320 | start.hStdInput = GetStdHandle (STD_INPUT_HANDLE); | |
321 | start.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE); | |
322 | start.hStdError = GetStdHandle (STD_ERROR_HANDLE); | |
323 | #endif /* HAVE_NTGUI */ | |
324 | ||
6cdfb6e6 RS |
325 | /* Explicitly specify no security */ |
326 | if (!InitializeSecurityDescriptor (&sec_desc, SECURITY_DESCRIPTOR_REVISION)) | |
c519b5e1 | 327 | goto EH_Fail; |
6cdfb6e6 | 328 | if (!SetSecurityDescriptorDacl (&sec_desc, TRUE, NULL, FALSE)) |
c519b5e1 | 329 | goto EH_Fail; |
6cdfb6e6 RS |
330 | sec_attrs.nLength = sizeof (sec_attrs); |
331 | sec_attrs.lpSecurityDescriptor = &sec_desc; | |
332 | sec_attrs.bInheritHandle = FALSE; | |
333 | ||
b2fc9f3d GV |
334 | strcpy (dir, process_dir); |
335 | unixtodos_filename (dir); | |
336 | ||
6cdfb6e6 | 337 | if (!CreateProcess (exe, cmdline, &sec_attrs, NULL, TRUE, |
b2fc9f3d GV |
338 | (!NILP (Vw32_start_process_share_console) |
339 | ? CREATE_NEW_PROCESS_GROUP | |
340 | : CREATE_NEW_CONSOLE), | |
341 | env, dir, | |
c519b5e1 GV |
342 | &start, &cp->procinfo)) |
343 | goto EH_Fail; | |
344 | ||
345 | cp->pid = (int) cp->procinfo.dwProcessId; | |
346 | ||
347 | /* Hack for Windows 95, which assigns large (ie negative) pids */ | |
348 | if (cp->pid < 0) | |
349 | cp->pid = -cp->pid; | |
350 | ||
351 | /* pid must fit in a Lisp_Int */ | |
352 | cp->pid = (cp->pid & VALMASK); | |
353 | ||
c519b5e1 | 354 | *pPid = cp->pid; |
b2fc9f3d | 355 | |
6cdfb6e6 | 356 | return TRUE; |
b2fc9f3d | 357 | |
6cdfb6e6 | 358 | EH_Fail: |
c519b5e1 | 359 | DebPrint (("create_child.CreateProcess failed: %ld\n", GetLastError());); |
6cdfb6e6 RS |
360 | return FALSE; |
361 | } | |
362 | ||
363 | /* create_child doesn't know what emacs' file handle will be for waiting | |
364 | on output from the child, so we need to make this additional call | |
365 | to register the handle with the process | |
366 | This way the select emulator knows how to match file handles with | |
367 | entries in child_procs. */ | |
368 | void | |
369 | register_child (int pid, int fd) | |
370 | { | |
371 | child_process *cp; | |
372 | ||
373 | cp = find_child_pid (pid); | |
374 | if (cp == NULL) | |
375 | { | |
376 | DebPrint (("register_child unable to find pid %lu\n", pid)); | |
377 | return; | |
378 | } | |
379 | ||
380 | #ifdef FULL_DEBUG | |
381 | DebPrint (("register_child registered fd %d with pid %lu\n", fd, pid)); | |
382 | #endif | |
383 | ||
384 | cp->fd = fd; | |
6cdfb6e6 | 385 | |
c519b5e1 GV |
386 | /* thread is initially blocked until select is called; set status so |
387 | that select will release thread */ | |
388 | cp->status = STATUS_READ_ACKNOWLEDGED; | |
389 | ||
390 | /* attach child_process to fd_info */ | |
391 | if (fd_info[fd].cp != NULL) | |
6cdfb6e6 | 392 | { |
c519b5e1 GV |
393 | DebPrint (("register_child: fd_info[%d] apparently in use!\n", fd)); |
394 | abort (); | |
6cdfb6e6 | 395 | } |
c519b5e1 GV |
396 | |
397 | fd_info[fd].cp = cp; | |
6cdfb6e6 RS |
398 | } |
399 | ||
400 | /* When a process dies its pipe will break so the reader thread will | |
401 | signal failure to the select emulator. | |
402 | The select emulator then calls this routine to clean up. | |
403 | Since the thread signaled failure we can assume it is exiting. */ | |
404 | static void | |
c519b5e1 | 405 | reap_subprocess (child_process *cp) |
6cdfb6e6 | 406 | { |
c519b5e1 | 407 | if (cp->procinfo.hProcess) |
6cdfb6e6 | 408 | { |
c519b5e1 | 409 | /* Reap the process */ |
b2fc9f3d GV |
410 | #ifdef FULL_DEBUG |
411 | /* Process should have already died before we are called. */ | |
412 | if (WaitForSingleObject (cp->procinfo.hProcess, 0) != WAIT_OBJECT_0) | |
413 | DebPrint (("reap_subprocess: child fpr fd %d has not died yet!", cp->fd)); | |
414 | #endif | |
c519b5e1 GV |
415 | CloseHandle (cp->procinfo.hProcess); |
416 | cp->procinfo.hProcess = NULL; | |
417 | CloseHandle (cp->procinfo.hThread); | |
418 | cp->procinfo.hThread = NULL; | |
6cdfb6e6 | 419 | } |
c519b5e1 GV |
420 | |
421 | /* For asynchronous children, the child_proc resources will be freed | |
422 | when the last pipe read descriptor is closed; for synchronous | |
423 | children, we must explicitly free the resources now because | |
424 | register_child has not been called. */ | |
425 | if (cp->fd == -1) | |
426 | delete_child (cp); | |
6cdfb6e6 RS |
427 | } |
428 | ||
429 | /* Wait for any of our existing child processes to die | |
430 | When it does, close its handle | |
431 | Return the pid and fill in the status if non-NULL. */ | |
22759c72 | 432 | |
6cdfb6e6 | 433 | int |
c519b5e1 | 434 | sys_wait (int *status) |
6cdfb6e6 RS |
435 | { |
436 | DWORD active, retval; | |
437 | int nh; | |
c519b5e1 | 438 | int pid; |
6cdfb6e6 RS |
439 | child_process *cp, *cps[MAX_CHILDREN]; |
440 | HANDLE wait_hnd[MAX_CHILDREN]; | |
441 | ||
442 | nh = 0; | |
443 | if (dead_child != NULL) | |
444 | { | |
445 | /* We want to wait for a specific child */ | |
c519b5e1 | 446 | wait_hnd[nh] = dead_child->procinfo.hProcess; |
6cdfb6e6 | 447 | cps[nh] = dead_child; |
c519b5e1 | 448 | if (!wait_hnd[nh]) abort (); |
6cdfb6e6 | 449 | nh++; |
b2fc9f3d GV |
450 | active = 0; |
451 | goto get_result; | |
6cdfb6e6 RS |
452 | } |
453 | else | |
454 | { | |
455 | for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--) | |
c519b5e1 GV |
456 | /* some child_procs might be sockets; ignore them */ |
457 | if (CHILD_ACTIVE (cp) && cp->procinfo.hProcess) | |
6cdfb6e6 | 458 | { |
c519b5e1 | 459 | wait_hnd[nh] = cp->procinfo.hProcess; |
6cdfb6e6 RS |
460 | cps[nh] = cp; |
461 | nh++; | |
462 | } | |
463 | } | |
464 | ||
465 | if (nh == 0) | |
466 | { | |
467 | /* Nothing to wait on, so fail */ | |
468 | errno = ECHILD; | |
469 | return -1; | |
470 | } | |
b2fc9f3d GV |
471 | |
472 | do | |
473 | { | |
474 | /* Check for quit about once a second. */ | |
475 | QUIT; | |
476 | active = WaitForMultipleObjects (nh, wait_hnd, FALSE, 1000); | |
477 | } while (active == WAIT_TIMEOUT); | |
478 | ||
6cdfb6e6 RS |
479 | if (active == WAIT_FAILED) |
480 | { | |
481 | errno = EBADF; | |
482 | return -1; | |
483 | } | |
b2fc9f3d GV |
484 | else if (active >= WAIT_OBJECT_0 |
485 | && active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS) | |
6cdfb6e6 RS |
486 | { |
487 | active -= WAIT_OBJECT_0; | |
488 | } | |
b2fc9f3d GV |
489 | else if (active >= WAIT_ABANDONED_0 |
490 | && active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS) | |
6cdfb6e6 RS |
491 | { |
492 | active -= WAIT_ABANDONED_0; | |
493 | } | |
b2fc9f3d GV |
494 | else |
495 | abort (); | |
496 | ||
497 | get_result: | |
6cdfb6e6 RS |
498 | if (!GetExitCodeProcess (wait_hnd[active], &retval)) |
499 | { | |
500 | DebPrint (("Wait.GetExitCodeProcess failed with %lu\n", | |
501 | GetLastError ())); | |
502 | retval = 1; | |
503 | } | |
504 | if (retval == STILL_ACTIVE) | |
505 | { | |
506 | /* Should never happen */ | |
507 | DebPrint (("Wait.WaitForMultipleObjects returned an active process\n")); | |
508 | errno = EINVAL; | |
509 | return -1; | |
510 | } | |
bc69349b RS |
511 | |
512 | /* Massage the exit code from the process to match the format expected | |
8e6208c5 | 513 | by the WIFSTOPPED et al macros in syswait.h. Only WIFSIGNALED and |
bc69349b RS |
514 | WIFEXITED are supported; WIFSTOPPED doesn't make sense under NT. */ |
515 | ||
516 | if (retval == STATUS_CONTROL_C_EXIT) | |
517 | retval = SIGINT; | |
518 | else | |
519 | retval <<= 8; | |
c519b5e1 | 520 | |
6cdfb6e6 | 521 | cp = cps[active]; |
c519b5e1 GV |
522 | pid = cp->pid; |
523 | #ifdef FULL_DEBUG | |
524 | DebPrint (("Wait signaled with process pid %d\n", cp->pid)); | |
525 | #endif | |
22759c72 | 526 | |
6cdfb6e6 RS |
527 | if (status) |
528 | { | |
22759c72 KH |
529 | *status = retval; |
530 | } | |
531 | else if (synch_process_alive) | |
532 | { | |
533 | synch_process_alive = 0; | |
22759c72 | 534 | |
3d7eead0 GV |
535 | /* Report the status of the synchronous process. */ |
536 | if (WIFEXITED (retval)) | |
537 | synch_process_retcode = WRETCODE (retval); | |
538 | else if (WIFSIGNALED (retval)) | |
539 | { | |
540 | int code = WTERMSIG (retval); | |
541 | char *signame = 0; | |
542 | ||
543 | if (code < NSIG) | |
544 | { | |
545 | /* Suppress warning if the table has const char *. */ | |
546 | signame = (char *) sys_siglist[code]; | |
547 | } | |
548 | if (signame == 0) | |
549 | signame = "unknown"; | |
550 | ||
551 | synch_process_death = signame; | |
552 | } | |
c519b5e1 GV |
553 | |
554 | reap_subprocess (cp); | |
6cdfb6e6 | 555 | } |
b2fc9f3d GV |
556 | |
557 | reap_subprocess (cp); | |
6cdfb6e6 | 558 | |
c519b5e1 | 559 | return pid; |
6cdfb6e6 RS |
560 | } |
561 | ||
b2fc9f3d GV |
562 | void |
563 | w32_executable_type (char * filename, int * is_dos_app, int * is_cygnus_app) | |
817abdf6 | 564 | { |
b2fc9f3d GV |
565 | file_data executable; |
566 | char * p; | |
567 | ||
568 | /* Default values in case we can't tell for sure. */ | |
569 | *is_dos_app = FALSE; | |
570 | *is_cygnus_app = FALSE; | |
571 | ||
572 | if (!open_input_file (&executable, filename)) | |
573 | return; | |
817abdf6 | 574 | |
b2fc9f3d GV |
575 | p = strrchr (filename, '.'); |
576 | ||
577 | /* We can only identify DOS .com programs from the extension. */ | |
578 | if (p && stricmp (p, ".com") == 0) | |
579 | *is_dos_app = TRUE; | |
580 | else if (p && (stricmp (p, ".bat") == 0 | |
581 | || stricmp (p, ".cmd") == 0)) | |
582 | { | |
583 | /* A DOS shell script - it appears that CreateProcess is happy to | |
584 | accept this (somewhat surprisingly); presumably it looks at | |
585 | COMSPEC to determine what executable to actually invoke. | |
586 | Therefore, we have to do the same here as well. */ | |
587 | /* Actually, I think it uses the program association for that | |
588 | extension, which is defined in the registry. */ | |
589 | p = egetenv ("COMSPEC"); | |
590 | if (p) | |
591 | w32_executable_type (p, is_dos_app, is_cygnus_app); | |
592 | } | |
593 | else | |
817abdf6 | 594 | { |
b2fc9f3d GV |
595 | /* Look for DOS .exe signature - if found, we must also check that |
596 | it isn't really a 16- or 32-bit Windows exe, since both formats | |
597 | start with a DOS program stub. Note that 16-bit Windows | |
598 | executables use the OS/2 1.x format. */ | |
817abdf6 | 599 | |
b2fc9f3d GV |
600 | IMAGE_DOS_HEADER * dos_header; |
601 | IMAGE_NT_HEADERS * nt_header; | |
602 | ||
603 | dos_header = (PIMAGE_DOS_HEADER) executable.file_base; | |
604 | if (dos_header->e_magic != IMAGE_DOS_SIGNATURE) | |
605 | goto unwind; | |
606 | ||
607 | nt_header = (PIMAGE_NT_HEADERS) ((char *) dos_header + dos_header->e_lfanew); | |
608 | ||
609 | if (nt_header > dos_header + executable.size) | |
817abdf6 | 610 | { |
b2fc9f3d GV |
611 | /* Some dos headers (pkunzip) have bogus e_lfanew fields. */ |
612 | *is_dos_app = TRUE; | |
613 | } | |
614 | else if (nt_header->Signature != IMAGE_NT_SIGNATURE | |
615 | && LOWORD (nt_header->Signature) != IMAGE_OS2_SIGNATURE) | |
616 | { | |
617 | *is_dos_app = TRUE; | |
618 | } | |
619 | else if (nt_header->Signature == IMAGE_NT_SIGNATURE) | |
620 | { | |
621 | /* Look for cygwin.dll in DLL import list. */ | |
622 | IMAGE_DATA_DIRECTORY import_dir = | |
623 | nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT]; | |
624 | IMAGE_IMPORT_DESCRIPTOR * imports; | |
625 | IMAGE_SECTION_HEADER * section; | |
626 | ||
627 | section = rva_to_section (import_dir.VirtualAddress, nt_header); | |
628 | imports = RVA_TO_PTR (import_dir.VirtualAddress, section, executable); | |
629 | ||
630 | for ( ; imports->Name; imports++) | |
631 | { | |
632 | char * dllname = RVA_TO_PTR (imports->Name, section, executable); | |
633 | ||
634 | if (strcmp (dllname, "cygwin.dll") == 0) | |
635 | { | |
636 | *is_cygnus_app = TRUE; | |
637 | break; | |
638 | } | |
639 | } | |
640 | } | |
817abdf6 | 641 | } |
b2fc9f3d GV |
642 | |
643 | unwind: | |
644 | close_file_data (&executable); | |
817abdf6 KH |
645 | } |
646 | ||
d9709fde GV |
647 | int |
648 | compare_env (const char **strp1, const char **strp2) | |
649 | { | |
650 | const char *str1 = *strp1, *str2 = *strp2; | |
651 | ||
652 | while (*str1 && *str2 && *str1 != '=' && *str2 != '=') | |
653 | { | |
654 | if (tolower (*str1) > tolower (*str2)) | |
655 | return 1; | |
656 | else if (tolower (*str1) < tolower (*str2)) | |
657 | return -1; | |
658 | str1++, str2++; | |
659 | } | |
660 | ||
661 | if (*str1 == '=' && *str2 == '=') | |
662 | return 0; | |
663 | else if (*str1 == '=') | |
664 | return -1; | |
665 | else | |
666 | return 1; | |
667 | } | |
668 | ||
669 | void | |
670 | merge_and_sort_env (char **envp1, char **envp2, char **new_envp) | |
671 | { | |
672 | char **optr, **nptr; | |
673 | int num; | |
674 | ||
675 | nptr = new_envp; | |
676 | optr = envp1; | |
677 | while (*optr) | |
678 | *nptr++ = *optr++; | |
679 | num = optr - envp1; | |
680 | ||
681 | optr = envp2; | |
682 | while (*optr) | |
683 | *nptr++ = *optr++; | |
684 | num += optr - envp2; | |
685 | ||
686 | qsort (new_envp, num, sizeof (char *), compare_env); | |
687 | ||
688 | *nptr = NULL; | |
689 | } | |
6cdfb6e6 RS |
690 | |
691 | /* When a new child process is created we need to register it in our list, | |
692 | so intercept spawn requests. */ | |
693 | int | |
c519b5e1 | 694 | sys_spawnve (int mode, char *cmdname, char **argv, char **envp) |
6cdfb6e6 | 695 | { |
0a4de642 | 696 | Lisp_Object program, full; |
6cdfb6e6 | 697 | char *cmdline, *env, *parg, **targ; |
d9709fde | 698 | int arglen, numenv; |
c519b5e1 GV |
699 | int pid; |
700 | child_process *cp; | |
b2fc9f3d GV |
701 | int is_dos_app, is_cygnus_app; |
702 | int do_quoting = 0; | |
703 | char escape_char; | |
d9709fde GV |
704 | /* We pass our process ID to our children by setting up an environment |
705 | variable in their environment. */ | |
706 | char ppid_env_var_buffer[64]; | |
707 | char *extra_env[] = {ppid_env_var_buffer, NULL}; | |
708 | ||
c519b5e1 GV |
709 | /* We don't care about the other modes */ |
710 | if (mode != _P_NOWAIT) | |
711 | { | |
712 | errno = EINVAL; | |
713 | return -1; | |
714 | } | |
0a4de642 RS |
715 | |
716 | /* Handle executable names without an executable suffix. */ | |
717 | program = make_string (cmdname, strlen (cmdname)); | |
718 | if (NILP (Ffile_executable_p (program))) | |
719 | { | |
720 | struct gcpro gcpro1; | |
721 | ||
722 | full = Qnil; | |
723 | GCPRO1 (program); | |
724 | openp (Vexec_path, program, EXEC_SUFFIXES, &full, 1); | |
725 | UNGCPRO; | |
726 | if (NILP (full)) | |
727 | { | |
728 | errno = EINVAL; | |
729 | return -1; | |
730 | } | |
b2fc9f3d | 731 | program = full; |
0a4de642 RS |
732 | } |
733 | ||
b2fc9f3d GV |
734 | /* make sure argv[0] and cmdname are both in DOS format */ |
735 | cmdname = XSTRING (program)->data; | |
c519b5e1 GV |
736 | unixtodos_filename (cmdname); |
737 | argv[0] = cmdname; | |
817abdf6 | 738 | |
b2fc9f3d GV |
739 | /* Determine whether program is a 16-bit DOS executable, or a Win32 |
740 | executable that is implicitly linked to the Cygnus dll (implying it | |
741 | was compiled with the Cygnus GNU toolchain and hence relies on | |
742 | cygwin.dll to parse the command line - we use this to decide how to | |
743 | escape quote chars in command line args that must be quoted). */ | |
744 | w32_executable_type (cmdname, &is_dos_app, &is_cygnus_app); | |
745 | ||
746 | /* On Windows 95, if cmdname is a DOS app, we invoke a helper | |
747 | application to start it by specifying the helper app as cmdname, | |
748 | while leaving the real app name as argv[0]. */ | |
749 | if (is_dos_app) | |
817abdf6 | 750 | { |
b2fc9f3d GV |
751 | cmdname = alloca (MAXPATHLEN); |
752 | if (egetenv ("CMDPROXY")) | |
753 | strcpy (cmdname, egetenv ("CMDPROXY")); | |
754 | else | |
755 | { | |
756 | strcpy (cmdname, XSTRING (Vinvocation_directory)->data); | |
757 | strcat (cmdname, "cmdproxy.exe"); | |
758 | } | |
759 | unixtodos_filename (cmdname); | |
817abdf6 | 760 | } |
6cdfb6e6 RS |
761 | |
762 | /* we have to do some conjuring here to put argv and envp into the | |
763 | form CreateProcess wants... argv needs to be a space separated/null | |
764 | terminated list of parameters, and envp is a null | |
765 | separated/double-null terminated list of parameters. | |
c519b5e1 | 766 | |
b2fc9f3d GV |
767 | Additionally, zero-length args and args containing whitespace or |
768 | quote chars need to be wrapped in double quotes - for this to work, | |
769 | embedded quotes need to be escaped as well. The aim is to ensure | |
770 | the child process reconstructs the argv array we start with | |
771 | exactly, so we treat quotes at the beginning and end of arguments | |
772 | as embedded quotes. | |
773 | ||
774 | The Win32 GNU-based library from Cygnus doubles quotes to escape | |
775 | them, while MSVC uses backslash for escaping. (Actually the MSVC | |
776 | startup code does attempt to recognise doubled quotes and accept | |
777 | them, but gets it wrong and ends up requiring three quotes to get a | |
778 | single embedded quote!) So by default we decide whether to use | |
779 | quote or backslash as the escape character based on whether the | |
780 | binary is apparently a Cygnus compiled app. | |
781 | ||
782 | Note that using backslash to escape embedded quotes requires | |
783 | additional special handling if an embedded quote is already | |
784 | preceeded by backslash, or if an arg requiring quoting ends with | |
785 | backslash. In such cases, the run of escape characters needs to be | |
786 | doubled. For consistency, we apply this special handling as long | |
787 | as the escape character is not quote. | |
788 | ||
789 | Since we have no idea how large argv and envp are likely to be we | |
790 | figure out list lengths on the fly and allocate them. */ | |
791 | ||
792 | if (!NILP (Vw32_quote_process_args)) | |
793 | { | |
794 | do_quoting = 1; | |
795 | /* Override escape char by binding w32-quote-process-args to | |
796 | desired character, or use t for auto-selection. */ | |
797 | if (INTEGERP (Vw32_quote_process_args)) | |
798 | escape_char = XINT (Vw32_quote_process_args); | |
799 | else | |
800 | escape_char = is_cygnus_app ? '"' : '\\'; | |
801 | } | |
6cdfb6e6 RS |
802 | |
803 | /* do argv... */ | |
804 | arglen = 0; | |
805 | targ = argv; | |
806 | while (*targ) | |
807 | { | |
c519b5e1 | 808 | char * p = *targ; |
b2fc9f3d GV |
809 | int need_quotes = 0; |
810 | int escape_char_run = 0; | |
c519b5e1 GV |
811 | |
812 | if (*p == 0) | |
b2fc9f3d GV |
813 | need_quotes = 1; |
814 | for ( ; *p; p++) | |
815 | { | |
816 | if (*p == '"') | |
817 | { | |
818 | /* allow for embedded quotes to be escaped */ | |
819 | arglen++; | |
820 | need_quotes = 1; | |
821 | /* handle the case where the embedded quote is already escaped */ | |
822 | if (escape_char_run > 0) | |
823 | { | |
824 | /* To preserve the arg exactly, we need to double the | |
825 | preceding escape characters (plus adding one to | |
826 | escape the quote character itself). */ | |
827 | arglen += escape_char_run; | |
828 | } | |
829 | } | |
830 | else if (*p == ' ' || *p == '\t') | |
831 | { | |
832 | need_quotes = 1; | |
833 | } | |
834 | ||
835 | if (*p == escape_char && escape_char != '"') | |
836 | escape_char_run++; | |
837 | else | |
838 | escape_char_run = 0; | |
839 | } | |
840 | if (need_quotes) | |
841 | { | |
842 | arglen += 2; | |
843 | /* handle the case where the arg ends with an escape char - we | |
844 | must not let the enclosing quote be escaped. */ | |
845 | if (escape_char_run > 0) | |
846 | arglen += escape_char_run; | |
847 | } | |
6cdfb6e6 RS |
848 | arglen += strlen (*targ++) + 1; |
849 | } | |
c519b5e1 | 850 | cmdline = alloca (arglen); |
6cdfb6e6 RS |
851 | targ = argv; |
852 | parg = cmdline; | |
853 | while (*targ) | |
854 | { | |
c519b5e1 | 855 | char * p = *targ; |
b2fc9f3d | 856 | int need_quotes = 0; |
c519b5e1 GV |
857 | |
858 | if (*p == 0) | |
b2fc9f3d | 859 | need_quotes = 1; |
93fdf2f8 | 860 | |
b2fc9f3d | 861 | if (do_quoting) |
93fdf2f8 | 862 | { |
93fdf2f8 RS |
863 | for ( ; *p; p++) |
864 | if (*p == ' ' || *p == '\t' || *p == '"') | |
b2fc9f3d | 865 | need_quotes = 1; |
93fdf2f8 | 866 | } |
b2fc9f3d | 867 | if (need_quotes) |
c519b5e1 | 868 | { |
b2fc9f3d | 869 | int escape_char_run = 0; |
c519b5e1 GV |
870 | char * first; |
871 | char * last; | |
872 | ||
873 | p = *targ; | |
874 | first = p; | |
875 | last = p + strlen (p) - 1; | |
876 | *parg++ = '"'; | |
b2fc9f3d GV |
877 | #if 0 |
878 | /* This version does not escape quotes if they occur at the | |
879 | beginning or end of the arg - this could lead to incorrect | |
880 | behaviour when the arg itself represents a command line | |
881 | containing quoted args. I believe this was originally done | |
882 | as a hack to make some things work, before | |
883 | `w32-quote-process-args' was added. */ | |
c519b5e1 GV |
884 | while (*p) |
885 | { | |
886 | if (*p == '"' && p > first && p < last) | |
b2fc9f3d | 887 | *parg++ = escape_char; /* escape embedded quotes */ |
c519b5e1 GV |
888 | *parg++ = *p++; |
889 | } | |
b2fc9f3d GV |
890 | #else |
891 | for ( ; *p; p++) | |
892 | { | |
893 | if (*p == '"') | |
894 | { | |
895 | /* double preceding escape chars if any */ | |
896 | while (escape_char_run > 0) | |
897 | { | |
898 | *parg++ = escape_char; | |
899 | escape_char_run--; | |
900 | } | |
901 | /* escape all quote chars, even at beginning or end */ | |
902 | *parg++ = escape_char; | |
903 | } | |
904 | *parg++ = *p; | |
905 | ||
906 | if (*p == escape_char && escape_char != '"') | |
907 | escape_char_run++; | |
908 | else | |
909 | escape_char_run = 0; | |
910 | } | |
911 | /* double escape chars before enclosing quote */ | |
912 | while (escape_char_run > 0) | |
913 | { | |
914 | *parg++ = escape_char; | |
915 | escape_char_run--; | |
916 | } | |
917 | #endif | |
c519b5e1 GV |
918 | *parg++ = '"'; |
919 | } | |
920 | else | |
921 | { | |
922 | strcpy (parg, *targ); | |
923 | parg += strlen (*targ); | |
924 | } | |
6cdfb6e6 | 925 | *parg++ = ' '; |
c519b5e1 | 926 | targ++; |
6cdfb6e6 RS |
927 | } |
928 | *--parg = '\0'; | |
929 | ||
930 | /* and envp... */ | |
931 | arglen = 1; | |
932 | targ = envp; | |
d9709fde | 933 | numenv = 1; /* for end null */ |
6cdfb6e6 RS |
934 | while (*targ) |
935 | { | |
936 | arglen += strlen (*targ++) + 1; | |
d9709fde | 937 | numenv++; |
6cdfb6e6 | 938 | } |
d9709fde | 939 | /* extra env vars... */ |
6cdfb6e6 RS |
940 | sprintf (ppid_env_var_buffer, "__PARENT_PROCESS_ID=%d", |
941 | GetCurrentProcessId ()); | |
942 | arglen += strlen (ppid_env_var_buffer) + 1; | |
d9709fde | 943 | numenv++; |
6cdfb6e6 | 944 | |
d9709fde GV |
945 | /* merge env passed in and extra env into one, and sort it. */ |
946 | targ = (char **) alloca (numenv * sizeof (char *)); | |
947 | merge_and_sort_env (envp, extra_env, targ); | |
948 | ||
949 | /* concatenate env entries. */ | |
c519b5e1 | 950 | env = alloca (arglen); |
6cdfb6e6 RS |
951 | parg = env; |
952 | while (*targ) | |
953 | { | |
954 | strcpy (parg, *targ); | |
955 | parg += strlen (*targ++); | |
956 | *parg++ = '\0'; | |
957 | } | |
6cdfb6e6 RS |
958 | *parg++ = '\0'; |
959 | *parg = '\0'; | |
c519b5e1 GV |
960 | |
961 | cp = new_child (); | |
962 | if (cp == NULL) | |
963 | { | |
964 | errno = EAGAIN; | |
965 | return -1; | |
966 | } | |
6cdfb6e6 RS |
967 | |
968 | /* Now create the process. */ | |
c519b5e1 | 969 | if (!create_child (cmdname, cmdline, env, &pid, cp)) |
6cdfb6e6 | 970 | { |
c519b5e1 | 971 | delete_child (cp); |
6cdfb6e6 | 972 | errno = ENOEXEC; |
c519b5e1 | 973 | return -1; |
6cdfb6e6 RS |
974 | } |
975 | ||
c519b5e1 | 976 | return pid; |
6cdfb6e6 RS |
977 | } |
978 | ||
979 | /* Emulate the select call | |
980 | Wait for available input on any of the given rfds, or timeout if | |
981 | a timeout is given and no input is detected | |
b2fc9f3d GV |
982 | wfds and efds are not supported and must be NULL. |
983 | ||
984 | For simplicity, we detect the death of child processes here and | |
985 | synchronously call the SIGCHLD handler. Since it is possible for | |
986 | children to be created without a corresponding pipe handle from which | |
987 | to read output, we wait separately on the process handles as well as | |
988 | the char_avail events for each process pipe. We only call | |
989 | wait/reap_process when the process actually terminates. */ | |
6cdfb6e6 RS |
990 | |
991 | /* From ntterm.c */ | |
992 | extern HANDLE keyboard_handle; | |
993 | /* From process.c */ | |
994 | extern int proc_buffered_char[]; | |
995 | ||
996 | int | |
22759c72 KH |
997 | sys_select (int nfds, SELECT_TYPE *rfds, SELECT_TYPE *wfds, SELECT_TYPE *efds, |
998 | EMACS_TIME *timeout) | |
6cdfb6e6 RS |
999 | { |
1000 | SELECT_TYPE orfds; | |
b2fc9f3d GV |
1001 | DWORD timeout_ms, start_time; |
1002 | int i, nh, nc, nr; | |
6cdfb6e6 | 1003 | DWORD active; |
b2fc9f3d GV |
1004 | child_process *cp, *cps[MAX_CHILDREN]; |
1005 | HANDLE wait_hnd[MAXDESC + MAX_CHILDREN]; | |
c519b5e1 | 1006 | int fdindex[MAXDESC]; /* mapping from wait handles back to descriptors */ |
6cdfb6e6 | 1007 | |
b2fc9f3d GV |
1008 | timeout_ms = timeout ? (timeout->tv_sec * 1000 + timeout->tv_usec / 1000) : INFINITE; |
1009 | ||
6cdfb6e6 RS |
1010 | /* If the descriptor sets are NULL but timeout isn't, then just Sleep. */ |
1011 | if (rfds == NULL && wfds == NULL && efds == NULL && timeout != NULL) | |
1012 | { | |
b2fc9f3d | 1013 | Sleep (timeout_ms); |
6cdfb6e6 RS |
1014 | return 0; |
1015 | } | |
1016 | ||
1017 | /* Otherwise, we only handle rfds, so fail otherwise. */ | |
1018 | if (rfds == NULL || wfds != NULL || efds != NULL) | |
1019 | { | |
1020 | errno = EINVAL; | |
1021 | return -1; | |
1022 | } | |
1023 | ||
1024 | orfds = *rfds; | |
1025 | FD_ZERO (rfds); | |
1026 | nr = 0; | |
1027 | ||
b2fc9f3d | 1028 | /* Build a list of pipe handles to wait on. */ |
6cdfb6e6 RS |
1029 | nh = 0; |
1030 | for (i = 0; i < nfds; i++) | |
1031 | if (FD_ISSET (i, &orfds)) | |
1032 | { | |
1033 | if (i == 0) | |
1034 | { | |
c519b5e1 GV |
1035 | if (keyboard_handle) |
1036 | { | |
1037 | /* Handle stdin specially */ | |
1038 | wait_hnd[nh] = keyboard_handle; | |
1039 | fdindex[nh] = i; | |
1040 | nh++; | |
1041 | } | |
6cdfb6e6 RS |
1042 | |
1043 | /* Check for any emacs-generated input in the queue since | |
1044 | it won't be detected in the wait */ | |
1045 | if (detect_input_pending ()) | |
1046 | { | |
1047 | FD_SET (i, rfds); | |
c519b5e1 | 1048 | return 1; |
6cdfb6e6 RS |
1049 | } |
1050 | } | |
1051 | else | |
1052 | { | |
c519b5e1 GV |
1053 | /* Child process and socket input */ |
1054 | cp = fd_info[i].cp; | |
6cdfb6e6 RS |
1055 | if (cp) |
1056 | { | |
c519b5e1 GV |
1057 | int current_status = cp->status; |
1058 | ||
1059 | if (current_status == STATUS_READ_ACKNOWLEDGED) | |
1060 | { | |
1061 | /* Tell reader thread which file handle to use. */ | |
1062 | cp->fd = i; | |
1063 | /* Wake up the reader thread for this process */ | |
1064 | cp->status = STATUS_READ_READY; | |
1065 | if (!SetEvent (cp->char_consumed)) | |
1066 | DebPrint (("nt_select.SetEvent failed with " | |
1067 | "%lu for fd %ld\n", GetLastError (), i)); | |
1068 | } | |
1069 | ||
1070 | #ifdef CHECK_INTERLOCK | |
1071 | /* slightly crude cross-checking of interlock between threads */ | |
1072 | ||
1073 | current_status = cp->status; | |
1074 | if (WaitForSingleObject (cp->char_avail, 0) == WAIT_OBJECT_0) | |
1075 | { | |
1076 | /* char_avail has been signalled, so status (which may | |
1077 | have changed) should indicate read has completed | |
1078 | but has not been acknowledged. */ | |
1079 | current_status = cp->status; | |
b2fc9f3d GV |
1080 | if (current_status != STATUS_READ_SUCCEEDED |
1081 | && current_status != STATUS_READ_FAILED) | |
c519b5e1 GV |
1082 | DebPrint (("char_avail set, but read not completed: status %d\n", |
1083 | current_status)); | |
1084 | } | |
1085 | else | |
1086 | { | |
1087 | /* char_avail has not been signalled, so status should | |
1088 | indicate that read is in progress; small possibility | |
1089 | that read has completed but event wasn't yet signalled | |
1090 | when we tested it (because a context switch occurred | |
1091 | or if running on separate CPUs). */ | |
b2fc9f3d GV |
1092 | if (current_status != STATUS_READ_READY |
1093 | && current_status != STATUS_READ_IN_PROGRESS | |
1094 | && current_status != STATUS_READ_SUCCEEDED | |
1095 | && current_status != STATUS_READ_FAILED) | |
c519b5e1 GV |
1096 | DebPrint (("char_avail reset, but read status is bad: %d\n", |
1097 | current_status)); | |
1098 | } | |
1099 | #endif | |
1100 | wait_hnd[nh] = cp->char_avail; | |
1101 | fdindex[nh] = i; | |
1102 | if (!wait_hnd[nh]) abort (); | |
1103 | nh++; | |
6cdfb6e6 RS |
1104 | #ifdef FULL_DEBUG |
1105 | DebPrint (("select waiting on child %d fd %d\n", | |
1106 | cp-child_procs, i)); | |
1107 | #endif | |
6cdfb6e6 RS |
1108 | } |
1109 | else | |
1110 | { | |
c519b5e1 GV |
1111 | /* Unable to find something to wait on for this fd, skip */ |
1112 | DebPrint (("sys_select: fd %ld is invalid! ignoring\n", i)); | |
1113 | abort (); | |
6cdfb6e6 RS |
1114 | } |
1115 | } | |
1116 | } | |
b2fc9f3d GV |
1117 | |
1118 | count_children: | |
1119 | /* Add handles of child processes. */ | |
1120 | nc = 0; | |
1121 | for (cp = child_procs+(child_proc_count-1); cp >= child_procs; cp--) | |
1122 | /* some child_procs might be sockets; ignore them */ | |
1123 | if (CHILD_ACTIVE (cp) && cp->procinfo.hProcess) | |
1124 | { | |
1125 | wait_hnd[nh + nc] = cp->procinfo.hProcess; | |
1126 | cps[nc] = cp; | |
1127 | nc++; | |
1128 | } | |
6cdfb6e6 RS |
1129 | |
1130 | /* Nothing to look for, so we didn't find anything */ | |
b2fc9f3d | 1131 | if (nh + nc == 0) |
6cdfb6e6 | 1132 | { |
22759c72 | 1133 | if (timeout) |
b2fc9f3d | 1134 | Sleep (timeout_ms); |
6cdfb6e6 RS |
1135 | return 0; |
1136 | } | |
6cdfb6e6 | 1137 | |
b2fc9f3d GV |
1138 | /* Wait for input or child death to be signalled. */ |
1139 | start_time = GetTickCount (); | |
1140 | active = WaitForMultipleObjects (nh + nc, wait_hnd, FALSE, timeout_ms); | |
c519b5e1 | 1141 | |
6cdfb6e6 RS |
1142 | if (active == WAIT_FAILED) |
1143 | { | |
1144 | DebPrint (("select.WaitForMultipleObjects (%d, %lu) failed with %lu\n", | |
b2fc9f3d | 1145 | nh + nc, timeout_ms, GetLastError ())); |
c519b5e1 GV |
1146 | /* don't return EBADF - this causes wait_reading_process_input to |
1147 | abort; WAIT_FAILED is returned when single-stepping under | |
1148 | Windows 95 after switching thread focus in debugger, and | |
1149 | possibly at other times. */ | |
1150 | errno = EINTR; | |
6cdfb6e6 RS |
1151 | return -1; |
1152 | } | |
1153 | else if (active == WAIT_TIMEOUT) | |
1154 | { | |
1155 | return 0; | |
1156 | } | |
b2fc9f3d GV |
1157 | else if (active >= WAIT_OBJECT_0 |
1158 | && active < WAIT_OBJECT_0+MAXIMUM_WAIT_OBJECTS) | |
6cdfb6e6 RS |
1159 | { |
1160 | active -= WAIT_OBJECT_0; | |
1161 | } | |
b2fc9f3d GV |
1162 | else if (active >= WAIT_ABANDONED_0 |
1163 | && active < WAIT_ABANDONED_0+MAXIMUM_WAIT_OBJECTS) | |
6cdfb6e6 RS |
1164 | { |
1165 | active -= WAIT_ABANDONED_0; | |
1166 | } | |
b2fc9f3d GV |
1167 | else |
1168 | abort (); | |
6cdfb6e6 | 1169 | |
c519b5e1 GV |
1170 | /* Loop over all handles after active (now officially documented as |
1171 | being the first signalled handle in the array). We do this to | |
1172 | ensure fairness, so that all channels with data available will be | |
1173 | processed - otherwise higher numbered channels could be starved. */ | |
1174 | do | |
6cdfb6e6 | 1175 | { |
b2fc9f3d GV |
1176 | if (active >= nh) |
1177 | { | |
1178 | cp = cps[active - nh]; | |
1179 | /* SIG_DFL for SIGCHLD is ignore */ | |
1180 | if (sig_handlers[SIGCHLD] != SIG_DFL | |
1181 | && sig_handlers[SIGCHLD] != SIG_IGN) | |
1182 | { | |
1183 | #ifdef FULL_DEBUG | |
1184 | DebPrint (("select calling SIGCHLD handler for pid %d\n", | |
1185 | cp->pid)); | |
1186 | #endif | |
1187 | dead_child = cp; | |
1188 | sig_handlers[SIGCHLD] (SIGCHLD); | |
1189 | dead_child = NULL; | |
1190 | } | |
1191 | } | |
1192 | else if (fdindex[active] == 0) | |
c519b5e1 GV |
1193 | { |
1194 | /* Keyboard input available */ | |
1195 | FD_SET (0, rfds); | |
6cdfb6e6 | 1196 | nr++; |
c519b5e1 | 1197 | } |
6cdfb6e6 | 1198 | else |
c519b5e1 | 1199 | { |
b2fc9f3d GV |
1200 | /* must be a socket or pipe - read ahead should have |
1201 | completed, either succeeding or failing. */ | |
c519b5e1 GV |
1202 | FD_SET (fdindex[active], rfds); |
1203 | nr++; | |
c519b5e1 GV |
1204 | } |
1205 | ||
b2fc9f3d GV |
1206 | /* Even though wait_reading_process_output only reads from at most |
1207 | one channel, we must process all channels here so that we reap | |
1208 | all children that have died. */ | |
1209 | while (++active < nh + nc) | |
c519b5e1 GV |
1210 | if (WaitForSingleObject (wait_hnd[active], 0) == WAIT_OBJECT_0) |
1211 | break; | |
b2fc9f3d GV |
1212 | } while (active < nh + nc); |
1213 | ||
1214 | /* If no input has arrived and timeout hasn't expired, wait again. */ | |
1215 | if (nr == 0) | |
1216 | { | |
1217 | DWORD elapsed = GetTickCount () - start_time; | |
1218 | ||
1219 | if (timeout_ms > elapsed) /* INFINITE is MAX_UINT */ | |
1220 | { | |
1221 | if (timeout_ms != INFINITE) | |
1222 | timeout_ms -= elapsed; | |
1223 | goto count_children; | |
1224 | } | |
1225 | } | |
c519b5e1 | 1226 | |
6cdfb6e6 RS |
1227 | return nr; |
1228 | } | |
1229 | ||
c519b5e1 | 1230 | /* Substitute for certain kill () operations */ |
b2fc9f3d GV |
1231 | |
1232 | static BOOL CALLBACK | |
1233 | find_child_console (HWND hwnd, child_process * cp) | |
1234 | { | |
1235 | DWORD thread_id; | |
1236 | DWORD process_id; | |
1237 | ||
1238 | thread_id = GetWindowThreadProcessId (hwnd, &process_id); | |
1239 | if (process_id == cp->procinfo.dwProcessId) | |
1240 | { | |
1241 | char window_class[32]; | |
1242 | ||
1243 | GetClassName (hwnd, window_class, sizeof (window_class)); | |
1244 | if (strcmp (window_class, | |
1245 | (os_subtype == OS_WIN95) | |
1246 | ? "tty" | |
1247 | : "ConsoleWindowClass") == 0) | |
1248 | { | |
1249 | cp->hwnd = hwnd; | |
1250 | return FALSE; | |
1251 | } | |
1252 | } | |
1253 | /* keep looking */ | |
1254 | return TRUE; | |
1255 | } | |
1256 | ||
6cdfb6e6 | 1257 | int |
c519b5e1 | 1258 | sys_kill (int pid, int sig) |
6cdfb6e6 RS |
1259 | { |
1260 | child_process *cp; | |
c519b5e1 GV |
1261 | HANDLE proc_hand; |
1262 | int need_to_free = 0; | |
1263 | int rc = 0; | |
6cdfb6e6 RS |
1264 | |
1265 | /* Only handle signals that will result in the process dying */ | |
1266 | if (sig != SIGINT && sig != SIGKILL && sig != SIGQUIT && sig != SIGHUP) | |
1267 | { | |
1268 | errno = EINVAL; | |
1269 | return -1; | |
1270 | } | |
c519b5e1 | 1271 | |
6cdfb6e6 RS |
1272 | cp = find_child_pid (pid); |
1273 | if (cp == NULL) | |
1274 | { | |
c519b5e1 GV |
1275 | proc_hand = OpenProcess (PROCESS_TERMINATE, 0, pid); |
1276 | if (proc_hand == NULL) | |
1277 | { | |
1278 | errno = EPERM; | |
1279 | return -1; | |
1280 | } | |
1281 | need_to_free = 1; | |
1282 | } | |
1283 | else | |
1284 | { | |
1285 | proc_hand = cp->procinfo.hProcess; | |
1286 | pid = cp->procinfo.dwProcessId; | |
b2fc9f3d GV |
1287 | |
1288 | /* Try to locate console window for process. */ | |
1289 | EnumWindows (find_child_console, (LPARAM) cp); | |
6cdfb6e6 RS |
1290 | } |
1291 | ||
1292 | if (sig == SIGINT) | |
1293 | { | |
b2fc9f3d GV |
1294 | if (NILP (Vw32_start_process_share_console) && cp && cp->hwnd) |
1295 | { | |
1296 | BYTE control_scan_code = (BYTE) MapVirtualKey (VK_CONTROL, 0); | |
1297 | BYTE vk_break_code = VK_CANCEL; | |
1298 | BYTE break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0); | |
1299 | HWND foreground_window; | |
1300 | ||
1301 | if (break_scan_code == 0) | |
1302 | { | |
1303 | /* Fake Ctrl-C if we can't manage Ctrl-Break. */ | |
1304 | vk_break_code = 'C'; | |
1305 | break_scan_code = (BYTE) MapVirtualKey (vk_break_code, 0); | |
1306 | } | |
1307 | ||
1308 | foreground_window = GetForegroundWindow (); | |
1309 | if (foreground_window && SetForegroundWindow (cp->hwnd)) | |
1310 | { | |
1311 | /* Generate keystrokes as if user had typed Ctrl-Break or Ctrl-C. */ | |
1312 | keybd_event (VK_CONTROL, control_scan_code, 0, 0); | |
1313 | keybd_event (vk_break_code, break_scan_code, 0, 0); | |
1314 | keybd_event (vk_break_code, break_scan_code, KEYEVENTF_KEYUP, 0); | |
1315 | keybd_event (VK_CONTROL, control_scan_code, KEYEVENTF_KEYUP, 0); | |
1316 | ||
1317 | SetForegroundWindow (foreground_window); | |
1318 | } | |
1319 | } | |
c519b5e1 | 1320 | /* Ctrl-Break is NT equivalent of SIGINT. */ |
b2fc9f3d | 1321 | else if (!GenerateConsoleCtrlEvent (CTRL_BREAK_EVENT, pid)) |
6cdfb6e6 | 1322 | { |
c519b5e1 | 1323 | DebPrint (("sys_kill.GenerateConsoleCtrlEvent return %d " |
6cdfb6e6 RS |
1324 | "for pid %lu\n", GetLastError (), pid)); |
1325 | errno = EINVAL; | |
c519b5e1 | 1326 | rc = -1; |
b2fc9f3d | 1327 | } |
6cdfb6e6 RS |
1328 | } |
1329 | else | |
1330 | { | |
b2fc9f3d GV |
1331 | if (NILP (Vw32_start_process_share_console) && cp && cp->hwnd) |
1332 | { | |
1333 | #if 1 | |
1334 | if (os_subtype == OS_WIN95) | |
1335 | { | |
1336 | /* | |
1337 | Another possibility is to try terminating the VDM out-right by | |
1338 | calling the Shell VxD (id 0x17) V86 interface, function #4 | |
1339 | "SHELL_Destroy_VM", ie. | |
1340 | ||
1341 | mov edx,4 | |
1342 | mov ebx,vm_handle | |
1343 | call shellapi | |
1344 | ||
1345 | First need to determine the current VM handle, and then arrange for | |
1346 | the shellapi call to be made from the system vm (by using | |
1347 | Switch_VM_and_callback). | |
1348 | ||
1349 | Could try to invoke DestroyVM through CallVxD. | |
1350 | ||
1351 | */ | |
1352 | PostMessage (cp->hwnd, WM_QUIT, 0xff, 0); | |
1353 | } | |
1354 | else | |
1355 | #endif | |
1356 | PostMessage (cp->hwnd, WM_CLOSE, 0, 0); | |
1357 | } | |
fbd6baed | 1358 | /* Kill the process. On W32 this doesn't kill child processes |
8eae7766 | 1359 | so it doesn't work very well for shells which is why it's not |
b2fc9f3d GV |
1360 | used in every case. */ |
1361 | else if (!TerminateProcess (proc_hand, 0xff)) | |
6cdfb6e6 | 1362 | { |
c519b5e1 | 1363 | DebPrint (("sys_kill.TerminateProcess returned %d " |
6cdfb6e6 RS |
1364 | "for pid %lu\n", GetLastError (), pid)); |
1365 | errno = EINVAL; | |
c519b5e1 | 1366 | rc = -1; |
6cdfb6e6 RS |
1367 | } |
1368 | } | |
c519b5e1 GV |
1369 | |
1370 | if (need_to_free) | |
1371 | CloseHandle (proc_hand); | |
1372 | ||
1373 | return rc; | |
6cdfb6e6 RS |
1374 | } |
1375 | ||
09522567 | 1376 | /* extern int report_file_error (char *, Lisp_Object); */ |
c519b5e1 GV |
1377 | |
1378 | /* The following two routines are used to manipulate stdin, stdout, and | |
1379 | stderr of our child processes. | |
1380 | ||
1381 | Assuming that in, out, and err are *not* inheritable, we make them | |
1382 | stdin, stdout, and stderr of the child as follows: | |
1383 | ||
1384 | - Save the parent's current standard handles. | |
1385 | - Set the std handles to inheritable duplicates of the ones being passed in. | |
1386 | (Note that _get_osfhandle() is an io.h procedure that retrieves the | |
1387 | NT file handle for a crt file descriptor.) | |
1388 | - Spawn the child, which inherits in, out, and err as stdin, | |
1389 | stdout, and stderr. (see Spawnve) | |
1390 | - Close the std handles passed to the child. | |
1391 | - Reset the parent's standard handles to the saved handles. | |
1392 | (see reset_standard_handles) | |
1393 | We assume that the caller closes in, out, and err after calling us. */ | |
1394 | ||
1395 | void | |
1396 | prepare_standard_handles (int in, int out, int err, HANDLE handles[3]) | |
6cdfb6e6 | 1397 | { |
c519b5e1 GV |
1398 | HANDLE parent; |
1399 | HANDLE newstdin, newstdout, newstderr; | |
1400 | ||
1401 | parent = GetCurrentProcess (); | |
1402 | ||
1403 | handles[0] = GetStdHandle (STD_INPUT_HANDLE); | |
1404 | handles[1] = GetStdHandle (STD_OUTPUT_HANDLE); | |
1405 | handles[2] = GetStdHandle (STD_ERROR_HANDLE); | |
1406 | ||
1407 | /* make inheritable copies of the new handles */ | |
1408 | if (!DuplicateHandle (parent, | |
1409 | (HANDLE) _get_osfhandle (in), | |
1410 | parent, | |
1411 | &newstdin, | |
1412 | 0, | |
1413 | TRUE, | |
1414 | DUPLICATE_SAME_ACCESS)) | |
1415 | report_file_error ("Duplicating input handle for child", Qnil); | |
6cdfb6e6 | 1416 | |
c519b5e1 GV |
1417 | if (!DuplicateHandle (parent, |
1418 | (HANDLE) _get_osfhandle (out), | |
1419 | parent, | |
1420 | &newstdout, | |
1421 | 0, | |
1422 | TRUE, | |
1423 | DUPLICATE_SAME_ACCESS)) | |
1424 | report_file_error ("Duplicating output handle for child", Qnil); | |
6cdfb6e6 | 1425 | |
c519b5e1 GV |
1426 | if (!DuplicateHandle (parent, |
1427 | (HANDLE) _get_osfhandle (err), | |
1428 | parent, | |
1429 | &newstderr, | |
1430 | 0, | |
1431 | TRUE, | |
1432 | DUPLICATE_SAME_ACCESS)) | |
1433 | report_file_error ("Duplicating error handle for child", Qnil); | |
1434 | ||
1435 | /* and store them as our std handles */ | |
1436 | if (!SetStdHandle (STD_INPUT_HANDLE, newstdin)) | |
1437 | report_file_error ("Changing stdin handle", Qnil); | |
6cdfb6e6 | 1438 | |
c519b5e1 GV |
1439 | if (!SetStdHandle (STD_OUTPUT_HANDLE, newstdout)) |
1440 | report_file_error ("Changing stdout handle", Qnil); | |
1441 | ||
1442 | if (!SetStdHandle (STD_ERROR_HANDLE, newstderr)) | |
1443 | report_file_error ("Changing stderr handle", Qnil); | |
1444 | } | |
1445 | ||
1446 | void | |
1447 | reset_standard_handles (int in, int out, int err, HANDLE handles[3]) | |
1448 | { | |
1449 | /* close the duplicated handles passed to the child */ | |
1450 | CloseHandle (GetStdHandle (STD_INPUT_HANDLE)); | |
1451 | CloseHandle (GetStdHandle (STD_OUTPUT_HANDLE)); | |
1452 | CloseHandle (GetStdHandle (STD_ERROR_HANDLE)); | |
1453 | ||
1454 | /* now restore parent's saved std handles */ | |
1455 | SetStdHandle (STD_INPUT_HANDLE, handles[0]); | |
1456 | SetStdHandle (STD_OUTPUT_HANDLE, handles[1]); | |
1457 | SetStdHandle (STD_ERROR_HANDLE, handles[2]); | |
6cdfb6e6 | 1458 | } |
c519b5e1 | 1459 | |
b2fc9f3d GV |
1460 | void |
1461 | set_process_dir (char * dir) | |
1462 | { | |
1463 | process_dir = dir; | |
1464 | } | |
1465 | ||
a11e68d0 RS |
1466 | #ifdef HAVE_SOCKETS |
1467 | ||
1468 | /* To avoid problems with winsock implementations that work over dial-up | |
1469 | connections causing or requiring a connection to exist while Emacs is | |
1470 | running, Emacs no longer automatically loads winsock on startup if it | |
1471 | is present. Instead, it will be loaded when open-network-stream is | |
1472 | first called. | |
1473 | ||
1474 | To allow full control over when winsock is loaded, we provide these | |
1475 | two functions to dynamically load and unload winsock. This allows | |
1476 | dial-up users to only be connected when they actually need to use | |
1477 | socket services. */ | |
1478 | ||
1479 | /* From nt.c */ | |
1480 | extern HANDLE winsock_lib; | |
1481 | extern BOOL term_winsock (void); | |
1482 | extern BOOL init_winsock (int load_now); | |
1483 | ||
1484 | extern Lisp_Object Vsystem_name; | |
1485 | ||
fbd6baed | 1486 | DEFUN ("w32-has-winsock", Fw32_has_winsock, Sw32_has_winsock, 0, 1, 0, |
a11e68d0 RS |
1487 | "Test for presence of the Windows socket library `winsock'.\n\ |
1488 | Returns non-nil if winsock support is present, nil otherwise.\n\ | |
1489 | \n\ | |
1490 | If the optional argument LOAD-NOW is non-nil, the winsock library is\n\ | |
1491 | also loaded immediately if not already loaded. If winsock is loaded,\n\ | |
1492 | the winsock local hostname is returned (since this may be different from\n\ | |
1493 | the value of `system-name' and should supplant it), otherwise t is\n\ | |
1494 | returned to indicate winsock support is present.") | |
1495 | (load_now) | |
1496 | Lisp_Object load_now; | |
1497 | { | |
1498 | int have_winsock; | |
1499 | ||
1500 | have_winsock = init_winsock (!NILP (load_now)); | |
1501 | if (have_winsock) | |
1502 | { | |
1503 | if (winsock_lib != NULL) | |
1504 | { | |
1505 | /* Return new value for system-name. The best way to do this | |
1506 | is to call init_system_name, saving and restoring the | |
1507 | original value to avoid side-effects. */ | |
1508 | Lisp_Object orig_hostname = Vsystem_name; | |
1509 | Lisp_Object hostname; | |
1510 | ||
1511 | init_system_name (); | |
1512 | hostname = Vsystem_name; | |
1513 | Vsystem_name = orig_hostname; | |
1514 | return hostname; | |
1515 | } | |
1516 | return Qt; | |
1517 | } | |
1518 | return Qnil; | |
1519 | } | |
1520 | ||
fbd6baed | 1521 | DEFUN ("w32-unload-winsock", Fw32_unload_winsock, Sw32_unload_winsock, |
a11e68d0 RS |
1522 | 0, 0, 0, |
1523 | "Unload the Windows socket library `winsock' if loaded.\n\ | |
1524 | This is provided to allow dial-up socket connections to be disconnected\n\ | |
1525 | when no longer needed. Returns nil without unloading winsock if any\n\ | |
1526 | socket connections still exist.") | |
1527 | () | |
1528 | { | |
1529 | return term_winsock () ? Qt : Qnil; | |
1530 | } | |
1531 | ||
1532 | #endif /* HAVE_SOCKETS */ | |
1533 | ||
93fdf2f8 | 1534 | \f |
b2fc9f3d GV |
1535 | /* Some miscellaneous functions that are Windows specific, but not GUI |
1536 | specific (ie. are applicable in terminal or batch mode as well). */ | |
1537 | ||
1538 | /* lifted from fileio.c */ | |
1539 | #define CORRECT_DIR_SEPS(s) \ | |
1540 | do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \ | |
1541 | else unixtodos_filename (s); \ | |
1542 | } while (0) | |
1543 | ||
1544 | DEFUN ("w32-short-file-name", Fw32_short_file_name, Sw32_short_file_name, 1, 1, 0, | |
1545 | "Return the short file name version (8.3) of the full path of FILENAME.\n\ | |
1546 | If FILENAME does not exist, return nil.\n\ | |
1547 | All path elements in FILENAME are converted to their short names.") | |
1548 | (filename) | |
1549 | Lisp_Object filename; | |
1550 | { | |
1551 | char shortname[MAX_PATH]; | |
1552 | ||
1553 | CHECK_STRING (filename, 0); | |
1554 | ||
1555 | /* first expand it. */ | |
1556 | filename = Fexpand_file_name (filename, Qnil); | |
1557 | ||
1558 | /* luckily, this returns the short version of each element in the path. */ | |
1559 | if (GetShortPathName (XSTRING (filename)->data, shortname, MAX_PATH) == 0) | |
1560 | return Qnil; | |
1561 | ||
1562 | CORRECT_DIR_SEPS (shortname); | |
1563 | ||
1564 | return build_string (shortname); | |
1565 | } | |
1566 | ||
1567 | ||
1568 | DEFUN ("w32-long-file-name", Fw32_long_file_name, Sw32_long_file_name, | |
1569 | 1, 1, 0, | |
1570 | "Return the long file name version of the full path of FILENAME.\n\ | |
1571 | If FILENAME does not exist, return nil.\n\ | |
1572 | All path elements in FILENAME are converted to their long names.") | |
1573 | (filename) | |
1574 | Lisp_Object filename; | |
1575 | { | |
1576 | char longname[ MAX_PATH ]; | |
1577 | ||
1578 | CHECK_STRING (filename, 0); | |
1579 | ||
1580 | /* first expand it. */ | |
1581 | filename = Fexpand_file_name (filename, Qnil); | |
1582 | ||
1583 | if (!w32_get_long_filename (XSTRING (filename)->data, longname, MAX_PATH)) | |
1584 | return Qnil; | |
1585 | ||
1586 | CORRECT_DIR_SEPS (longname); | |
1587 | ||
1588 | return build_string (longname); | |
1589 | } | |
1590 | ||
1591 | DEFUN ("w32-set-process-priority", Fw32_set_process_priority, Sw32_set_process_priority, | |
1592 | 2, 2, 0, | |
1593 | "Set the priority of PROCESS to PRIORITY.\n\ | |
1594 | If PROCESS is nil, the priority of Emacs is changed, otherwise the\n\ | |
1595 | priority of the process whose pid is PROCESS is changed.\n\ | |
1596 | PRIORITY should be one of the symbols high, normal, or low;\n\ | |
1597 | any other symbol will be interpreted as normal.\n\ | |
1598 | \n\ | |
1599 | If successful, the return value is t, otherwise nil.") | |
1600 | (process, priority) | |
1601 | Lisp_Object process, priority; | |
1602 | { | |
1603 | HANDLE proc_handle = GetCurrentProcess (); | |
1604 | DWORD priority_class = NORMAL_PRIORITY_CLASS; | |
1605 | Lisp_Object result = Qnil; | |
1606 | ||
1607 | CHECK_SYMBOL (priority, 0); | |
1608 | ||
1609 | if (!NILP (process)) | |
1610 | { | |
1611 | DWORD pid; | |
1612 | child_process *cp; | |
1613 | ||
1614 | CHECK_NUMBER (process, 0); | |
1615 | ||
1616 | /* Allow pid to be an internally generated one, or one obtained | |
1617 | externally. This is necessary because real pids on Win95 are | |
1618 | negative. */ | |
1619 | ||
1620 | pid = XINT (process); | |
1621 | cp = find_child_pid (pid); | |
1622 | if (cp != NULL) | |
1623 | pid = cp->procinfo.dwProcessId; | |
1624 | ||
1625 | proc_handle = OpenProcess (PROCESS_SET_INFORMATION, FALSE, pid); | |
1626 | } | |
1627 | ||
1628 | if (EQ (priority, Qhigh)) | |
1629 | priority_class = HIGH_PRIORITY_CLASS; | |
1630 | else if (EQ (priority, Qlow)) | |
1631 | priority_class = IDLE_PRIORITY_CLASS; | |
1632 | ||
1633 | if (proc_handle != NULL) | |
1634 | { | |
1635 | if (SetPriorityClass (proc_handle, priority_class)) | |
1636 | result = Qt; | |
1637 | if (!NILP (process)) | |
1638 | CloseHandle (proc_handle); | |
1639 | } | |
1640 | ||
1641 | return result; | |
1642 | } | |
1643 | ||
1644 | ||
1645 | DEFUN ("w32-get-locale-info", Fw32_get_locale_info, Sw32_get_locale_info, 1, 2, 0, | |
1646 | "Return information about the Windows locale LCID.\n\ | |
1647 | By default, return a three letter locale code which encodes the default\n\ | |
1648 | language as the first two characters, and the country or regionial variant\n\ | |
1649 | as the third letter. For example, ENU refers to `English (United States)',\n\ | |
1650 | while ENC means `English (Canadian)'.\n\ | |
1651 | \n\ | |
1652 | If the optional argument LONGFORM is non-nil, the long form of the locale\n\ | |
1653 | name is returned, e.g. `English (United States)' instead.\n\ | |
1654 | \n\ | |
1655 | If LCID (a 16-bit number) is not a valid locale, the result is nil.") | |
1656 | (lcid, longform) | |
1657 | Lisp_Object lcid, longform; | |
1658 | { | |
1659 | int got_abbrev; | |
1660 | int got_full; | |
1661 | char abbrev_name[32] = { 0 }; | |
1662 | char full_name[256] = { 0 }; | |
1663 | ||
1664 | CHECK_NUMBER (lcid, 0); | |
1665 | ||
1666 | if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED)) | |
1667 | return Qnil; | |
1668 | ||
1669 | if (NILP (longform)) | |
1670 | { | |
1671 | got_abbrev = GetLocaleInfo (XINT (lcid), | |
1672 | LOCALE_SABBREVLANGNAME | LOCALE_USE_CP_ACP, | |
1673 | abbrev_name, sizeof (abbrev_name)); | |
1674 | if (got_abbrev) | |
1675 | return build_string (abbrev_name); | |
1676 | } | |
1677 | else | |
1678 | { | |
1679 | got_full = GetLocaleInfo (XINT (lcid), | |
1680 | LOCALE_SLANGUAGE | LOCALE_USE_CP_ACP, | |
1681 | full_name, sizeof (full_name)); | |
1682 | if (got_full) | |
1683 | return build_string (full_name); | |
1684 | } | |
1685 | ||
1686 | return Qnil; | |
1687 | } | |
1688 | ||
1689 | ||
1690 | DEFUN ("w32-get-current-locale-id", Fw32_get_current_locale_id, Sw32_get_current_locale_id, 0, 0, 0, | |
1691 | "Return Windows locale id for current locale setting.\n\ | |
1692 | This is a numerical value; use `w32-get-locale-info' to convert to a\n\ | |
1693 | human-readable form.") | |
1694 | () | |
1695 | { | |
1696 | return make_number (GetThreadLocale ()); | |
1697 | } | |
1698 | ||
1699 | ||
1700 | DEFUN ("w32-get-default-locale-id", Fw32_get_default_locale_id, Sw32_get_default_locale_id, 0, 1, 0, | |
1701 | "Return Windows locale id for default locale setting.\n\ | |
1702 | By default, the system default locale setting is returned; if the optional\n\ | |
1703 | parameter USERP is non-nil, the user default locale setting is returned.\n\ | |
1704 | This is a numerical value; use `w32-get-locale-info' to convert to a\n\ | |
1705 | human-readable form.") | |
1706 | (userp) | |
1707 | Lisp_Object userp; | |
1708 | { | |
1709 | if (NILP (userp)) | |
1710 | return make_number (GetSystemDefaultLCID ()); | |
1711 | return make_number (GetUserDefaultLCID ()); | |
1712 | } | |
1713 | ||
1714 | ||
1715 | DEFUN ("w32-set-current-locale", Fw32_set_current_locale, Sw32_set_current_locale, 1, 1, 0, | |
1716 | "Make Windows locale LCID be the current locale setting for Emacs.\n\ | |
1717 | If successful, the new locale id is returned, otherwise nil.") | |
1718 | (lcid) | |
1719 | Lisp_Object lcid; | |
1720 | { | |
1721 | CHECK_NUMBER (lcid, 0); | |
1722 | ||
1723 | if (!IsValidLocale (XINT (lcid), LCID_SUPPORTED)) | |
1724 | return Qnil; | |
1725 | ||
1726 | if (!SetThreadLocale (XINT (lcid))) | |
1727 | return Qnil; | |
1728 | ||
1729 | return make_number (GetThreadLocale ()); | |
1730 | } | |
1731 | ||
1732 | \f | |
93fdf2f8 RS |
1733 | syms_of_ntproc () |
1734 | { | |
b2fc9f3d GV |
1735 | Qhigh = intern ("high"); |
1736 | Qlow = intern ("low"); | |
1737 | ||
a11e68d0 | 1738 | #ifdef HAVE_SOCKETS |
fbd6baed GV |
1739 | defsubr (&Sw32_has_winsock); |
1740 | defsubr (&Sw32_unload_winsock); | |
a11e68d0 | 1741 | #endif |
b2fc9f3d GV |
1742 | defsubr (&Sw32_short_file_name); |
1743 | defsubr (&Sw32_long_file_name); | |
1744 | defsubr (&Sw32_set_process_priority); | |
1745 | defsubr (&Sw32_get_locale_info); | |
1746 | defsubr (&Sw32_get_current_locale_id); | |
1747 | defsubr (&Sw32_get_default_locale_id); | |
1748 | defsubr (&Sw32_set_current_locale); | |
a11e68d0 | 1749 | |
fbd6baed | 1750 | DEFVAR_LISP ("w32-quote-process-args", &Vw32_quote_process_args, |
93fdf2f8 RS |
1751 | "Non-nil enables quoting of process arguments to ensure correct parsing.\n\ |
1752 | Because Windows does not directly pass argv arrays to child processes,\n\ | |
1753 | programs have to reconstruct the argv array by parsing the command\n\ | |
1754 | line string. For an argument to contain a space, it must be enclosed\n\ | |
1755 | in double quotes or it will be parsed as multiple arguments.\n\ | |
1756 | \n\ | |
b2fc9f3d GV |
1757 | If the value is a character, that character will be used to escape any\n\ |
1758 | quote characters that appear, otherwise a suitable escape character\n\ | |
1759 | will be chosen based on the type of the program."); | |
1760 | Vw32_quote_process_args = Qt; | |
817abdf6 | 1761 | |
fbd6baed GV |
1762 | DEFVAR_LISP ("w32-start-process-show-window", |
1763 | &Vw32_start_process_show_window, | |
0ecf7d36 RS |
1764 | "When nil, processes started via start-process hide their windows.\n\ |
1765 | When non-nil, they show their window in the method of their choice."); | |
fbd6baed | 1766 | Vw32_start_process_show_window = Qnil; |
0ecf7d36 | 1767 | |
b2fc9f3d GV |
1768 | DEFVAR_LISP ("w32-start-process-share-console", |
1769 | &Vw32_start_process_share_console, | |
1770 | "When nil, processes started via start-process are given a new console.\n\ | |
1771 | When non-nil, they share the Emacs console; this has the limitation of\n\ | |
1772 | allowing only only DOS subprocess to run at a time (whether started directly\n\ | |
1773 | or indirectly by Emacs), and preventing Emacs from cleanly terminating the\n\ | |
1774 | subprocess group, but may allow Emacs to interrupt a subprocess that doesn't\n\ | |
1775 | otherwise respond to interrupts from Emacs."); | |
1776 | Vw32_start_process_share_console = Qnil; | |
1777 | ||
fbd6baed | 1778 | DEFVAR_INT ("w32-pipe-read-delay", &Vw32_pipe_read_delay, |
817abdf6 KH |
1779 | "Forced delay before reading subprocess output.\n\ |
1780 | This is done to improve the buffering of subprocess output, by\n\ | |
1781 | avoiding the inefficiency of frequently reading small amounts of data.\n\ | |
1782 | \n\ | |
1783 | If positive, the value is the number of milliseconds to sleep before\n\ | |
1784 | reading the subprocess output. If negative, the magnitude is the number\n\ | |
1785 | of time slices to wait (effectively boosting the priority of the child\n\ | |
1786 | process temporarily). A value of zero disables waiting entirely."); | |
fbd6baed | 1787 | Vw32_pipe_read_delay = 50; |
0c04091e | 1788 | |
fbd6baed | 1789 | DEFVAR_LISP ("w32-downcase-file-names", &Vw32_downcase_file_names, |
0c04091e RS |
1790 | "Non-nil means convert all-upper case file names to lower case.\n\ |
1791 | This applies when performing completions and file name expansion."); | |
fbd6baed | 1792 | Vw32_downcase_file_names = Qnil; |
b2fc9f3d GV |
1793 | |
1794 | #if 0 | |
1795 | DEFVAR_LISP ("w32-generate-fake-inodes", &Vw32_generate_fake_inodes, | |
1796 | "Non-nil means attempt to fake realistic inode values.\n\ | |
1797 | This works by hashing the truename of files, and should detect \n\ | |
1798 | aliasing between long and short (8.3 DOS) names, but can have\n\ | |
1799 | false positives because of hash collisions. Note that determing\n\ | |
1800 | the truename of a file can be slow."); | |
1801 | Vw32_generate_fake_inodes = Qnil; | |
1802 | #endif | |
1803 | ||
1804 | DEFVAR_LISP ("w32-get-true-file-attributes", &Vw32_get_true_file_attributes, | |
1805 | "Non-nil means determine accurate link count in file-attributes.\n\ | |
1806 | This option slows down file-attributes noticeably, so is disabled by\n\ | |
1807 | default. Note that it is only useful for files on NTFS volumes,\n\ | |
1808 | where hard links are supported."); | |
1809 | Vw32_get_true_file_attributes = Qnil; | |
93fdf2f8 | 1810 | } |
c519b5e1 | 1811 | /* end of ntproc.c */ |