Commit | Line | Data |
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80856e74 | 1 | /* Synchronous subprocess invocation for GNU Emacs. |
826c56ac | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994 Free Software Foundation, Inc. |
80856e74 JB |
3 | |
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 | |
826c56ac | 8 | the Free Software Foundation; either version 2, or (at your option) |
80856e74 JB |
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, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include <signal.h> | |
e576cab4 | 22 | #include <errno.h> |
0af6a831 | 23 | #include <stdio.h> |
80856e74 | 24 | |
18160b98 | 25 | #include <config.h> |
80856e74 | 26 | |
426b37ae | 27 | extern int errno; |
826c56ac | 28 | extern char *strerror (); |
426b37ae | 29 | |
80856e74 JB |
30 | /* Define SIGCHLD as an alias for SIGCLD. */ |
31 | ||
32 | #if !defined (SIGCHLD) && defined (SIGCLD) | |
33 | #define SIGCHLD SIGCLD | |
34 | #endif /* SIGCLD */ | |
35 | ||
36 | #include <sys/types.h> | |
88a64fef | 37 | |
80856e74 JB |
38 | #include <sys/file.h> |
39 | #ifdef USG5 | |
472e83fe | 40 | #define INCLUDED_FCNTL |
80856e74 JB |
41 | #include <fcntl.h> |
42 | #endif | |
43 | ||
7e6c2178 | 44 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
472e83fe | 45 | #define INCLUDED_FCNTL |
7e6c2178 RS |
46 | #include <fcntl.h> |
47 | #include <sys/stat.h> | |
48 | #include <sys/param.h> | |
49 | #include <errno.h> | |
50 | #endif /* MSDOS */ | |
51 | ||
80856e74 JB |
52 | #ifndef O_RDONLY |
53 | #define O_RDONLY 0 | |
54 | #endif | |
55 | ||
56 | #ifndef O_WRONLY | |
57 | #define O_WRONLY 1 | |
58 | #endif | |
59 | ||
60 | #include "lisp.h" | |
61 | #include "commands.h" | |
62 | #include "buffer.h" | |
2a6b3537 | 63 | #include <paths.h> |
80856e74 | 64 | #include "process.h" |
d177f194 | 65 | #include "syssignal.h" |
a129418f | 66 | #include "systty.h" |
80856e74 JB |
67 | |
68 | #ifdef VMS | |
69 | extern noshare char **environ; | |
70 | #else | |
71 | extern char **environ; | |
72 | #endif | |
73 | ||
74 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
75 | ||
7e6c2178 | 76 | #ifdef MSDOS |
093650fe RS |
77 | /* When we are starting external processes we need to know whether they |
78 | take binary input (no conversion) or text input (\n is converted to | |
79 | \r\n). Similar for output: if newlines are written as \r\n then it's | |
80 | text process output, otherwise it's binary. */ | |
81 | Lisp_Object Vbinary_process_input; | |
82 | Lisp_Object Vbinary_process_output; | |
7e6c2178 RS |
83 | #endif |
84 | ||
35a2f4b8 | 85 | Lisp_Object Vexec_path, Vexec_directory, Vdata_directory, Vdoc_directory; |
ed61592a | 86 | Lisp_Object Vconfigure_info_directory; |
80856e74 JB |
87 | |
88 | Lisp_Object Vshell_file_name; | |
89 | ||
80856e74 | 90 | Lisp_Object Vprocess_environment; |
80856e74 | 91 | |
093650fe RS |
92 | #ifdef MSDOS |
93 | Lisp_Object Qbuffer_file_type; | |
94 | #endif | |
95 | ||
80856e74 JB |
96 | /* True iff we are about to fork off a synchronous process or if we |
97 | are waiting for it. */ | |
98 | int synch_process_alive; | |
99 | ||
100 | /* Nonzero => this is a string explaining death of synchronous subprocess. */ | |
101 | char *synch_process_death; | |
102 | ||
103 | /* If synch_process_death is zero, | |
104 | this is exit code of synchronous subprocess. */ | |
105 | int synch_process_retcode; | |
8de15d69 RS |
106 | |
107 | extern Lisp_Object Vdoc_file_name; | |
80856e74 | 108 | \f |
37d54121 RS |
109 | /* Clean up when exiting Fcall_process. |
110 | On MSDOS, delete the temporary file on any kind of termination. | |
111 | On Unix, kill the process and any children on termination by signal. */ | |
112 | ||
113 | /* Nonzero if this is termination due to exit. */ | |
114 | static int call_process_exited; | |
115 | ||
80856e74 JB |
116 | #ifndef VMS /* VMS version is in vmsproc.c. */ |
117 | ||
d177f194 JB |
118 | static Lisp_Object |
119 | call_process_kill (fdpid) | |
120 | Lisp_Object fdpid; | |
121 | { | |
122 | close (XFASTINT (Fcar (fdpid))); | |
123 | EMACS_KILLPG (XFASTINT (Fcdr (fdpid)), SIGKILL); | |
124 | synch_process_alive = 0; | |
125 | return Qnil; | |
126 | } | |
127 | ||
80856e74 JB |
128 | Lisp_Object |
129 | call_process_cleanup (fdpid) | |
130 | Lisp_Object fdpid; | |
131 | { | |
7e6c2178 RS |
132 | #ifdef MSDOS |
133 | /* for MSDOS fdpid is really (fd . tempfile) */ | |
c1350752 KH |
134 | register Lisp_Object file; |
135 | file = Fcdr (fdpid); | |
7e6c2178 RS |
136 | close (XFASTINT (Fcar (fdpid))); |
137 | if (strcmp (XSTRING (file)-> data, NULL_DEVICE) != 0) | |
138 | unlink (XSTRING (file)->data); | |
139 | #else /* not MSDOS */ | |
d177f194 JB |
140 | register int pid = XFASTINT (Fcdr (fdpid)); |
141 | ||
6b6e798b | 142 | |
37d54121 | 143 | if (call_process_exited) |
6b6e798b RS |
144 | { |
145 | close (XFASTINT (Fcar (fdpid))); | |
146 | return Qnil; | |
147 | } | |
37d54121 | 148 | |
d177f194 JB |
149 | if (EMACS_KILLPG (pid, SIGINT) == 0) |
150 | { | |
151 | int count = specpdl_ptr - specpdl; | |
152 | record_unwind_protect (call_process_kill, fdpid); | |
153 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); | |
154 | immediate_quit = 1; | |
155 | QUIT; | |
156 | wait_for_termination (pid); | |
157 | immediate_quit = 0; | |
158 | specpdl_ptr = specpdl + count; /* Discard the unwind protect. */ | |
159 | message1 ("Waiting for process to die...done"); | |
160 | } | |
80856e74 | 161 | synch_process_alive = 0; |
d177f194 | 162 | close (XFASTINT (Fcar (fdpid))); |
7e6c2178 | 163 | #endif /* not MSDOS */ |
80856e74 JB |
164 | return Qnil; |
165 | } | |
166 | ||
167 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, | |
168 | "Call PROGRAM synchronously in separate process.\n\ | |
169 | The program's input comes from file INFILE (nil means `/dev/null').\n\ | |
170 | Insert output in BUFFER before point; t means current buffer;\n\ | |
171 | nil for BUFFER means discard it; 0 means discard and don't wait.\n\ | |
172 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.\n\ | |
173 | Remaining arguments are strings passed as command arguments to PROGRAM.\n\ | |
e576cab4 | 174 | If BUFFER is 0, returns immediately with value nil.\n\ |
80856e74 | 175 | Otherwise waits for PROGRAM to terminate\n\ |
e576cab4 | 176 | and returns a numeric exit status or a signal description string.\n\ |
d177f194 | 177 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.") |
80856e74 JB |
178 | (nargs, args) |
179 | int nargs; | |
180 | register Lisp_Object *args; | |
181 | { | |
58616e67 | 182 | Lisp_Object infile, buffer, current_dir, display, path; |
80856e74 JB |
183 | int fd[2]; |
184 | int filefd; | |
185 | register int pid; | |
186 | char buf[1024]; | |
187 | int count = specpdl_ptr - specpdl; | |
188 | register unsigned char **new_argv | |
189 | = (unsigned char **) alloca ((max (2, nargs - 2)) * sizeof (char *)); | |
190 | struct buffer *old = current_buffer; | |
7e6c2178 RS |
191 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
192 | char *outf, *tempfile; | |
193 | int outfilefd; | |
194 | #endif | |
80856e74 JB |
195 | #if 0 |
196 | int mask; | |
197 | #endif | |
80856e74 JB |
198 | CHECK_STRING (args[0], 0); |
199 | ||
7e6c2178 RS |
200 | #ifndef subprocesses |
201 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
202 | if (nargs >= 3 && XTYPE (args[2]) == Lisp_Int) | |
203 | error ("Operating system cannot handle asynchronous subprocesses"); | |
204 | #endif /* subprocesses */ | |
205 | ||
e576cab4 JB |
206 | if (nargs >= 2 && ! NILP (args[1])) |
207 | { | |
208 | infile = Fexpand_file_name (args[1], current_buffer->directory); | |
209 | CHECK_STRING (infile, 1); | |
210 | } | |
80856e74 | 211 | else |
5437e9f9 | 212 | infile = build_string (NULL_DEVICE); |
80856e74 | 213 | |
e576cab4 JB |
214 | if (nargs >= 3) |
215 | { | |
216 | register Lisp_Object tem; | |
044512ed | 217 | |
e576cab4 JB |
218 | buffer = tem = args[2]; |
219 | if (!(EQ (tem, Qnil) | |
220 | || EQ (tem, Qt) | |
221 | || XFASTINT (tem) == 0)) | |
222 | { | |
223 | buffer = Fget_buffer (tem); | |
224 | CHECK_BUFFER (buffer, 2); | |
225 | } | |
226 | } | |
227 | else | |
228 | buffer = Qnil; | |
80856e74 | 229 | |
58616e67 JB |
230 | /* Make sure that the child will be able to chdir to the current |
231 | buffer's current directory, or its unhandled equivalent. We | |
232 | can't just have the child check for an error when it does the | |
233 | chdir, since it's in a vfork. | |
234 | ||
235 | We have to GCPRO around this because Fexpand_file_name, | |
236 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
237 | might call a file name handling function. The argument list is | |
238 | protected by the caller, so all we really have to worry about is | |
239 | buffer. */ | |
240 | { | |
241 | struct gcpro gcpro1, gcpro2, gcpro3; | |
242 | ||
243 | current_dir = current_buffer->directory; | |
244 | ||
245 | GCPRO3 (infile, buffer, current_dir); | |
246 | ||
c52b0b34 KH |
247 | current_dir |
248 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), | |
249 | Qnil); | |
58616e67 JB |
250 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
251 | report_file_error ("Setting current directory", | |
252 | Fcons (current_buffer->directory, Qnil)); | |
253 | ||
254 | UNGCPRO; | |
255 | } | |
256 | ||
e576cab4 | 257 | display = nargs >= 4 ? args[3] : Qnil; |
80856e74 | 258 | |
e576cab4 | 259 | filefd = open (XSTRING (infile)->data, O_RDONLY, 0); |
80856e74 JB |
260 | if (filefd < 0) |
261 | { | |
e576cab4 | 262 | report_file_error ("Opening process input file", Fcons (infile, Qnil)); |
80856e74 JB |
263 | } |
264 | /* Search for program; barf if not found. */ | |
c52b0b34 KH |
265 | { |
266 | struct gcpro gcpro1; | |
267 | ||
268 | GCPRO1 (current_dir); | |
269 | openp (Vexec_path, args[0], EXEC_SUFFIXES, &path, 1); | |
270 | UNGCPRO; | |
271 | } | |
012c6fcb | 272 | if (NILP (path)) |
80856e74 JB |
273 | { |
274 | close (filefd); | |
275 | report_file_error ("Searching for program", Fcons (args[0], Qnil)); | |
276 | } | |
277 | new_argv[0] = XSTRING (path)->data; | |
c52b0b34 KH |
278 | { |
279 | register int i; | |
280 | for (i = 4; i < nargs; i++) | |
281 | { | |
282 | CHECK_STRING (args[i], i); | |
283 | new_argv[i - 3] = XSTRING (args[i])->data; | |
284 | } | |
285 | new_argv[i - 3] = 0; | |
286 | } | |
80856e74 | 287 | |
7e6c2178 RS |
288 | #ifdef MSDOS /* MW, July 1993 */ |
289 | /* These vars record information from process termination. | |
290 | Clear them now before process can possibly terminate, | |
291 | to avoid timing error if process terminates soon. */ | |
292 | synch_process_death = 0; | |
293 | synch_process_retcode = 0; | |
294 | ||
295 | if ((outf = egetenv ("TMP")) || (outf = egetenv ("TEMP"))) | |
296 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); | |
297 | else | |
298 | { | |
299 | tempfile = alloca (20); | |
300 | *tempfile = '\0'; | |
301 | } | |
302 | dostounix_filename (tempfile); | |
303 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') | |
304 | strcat (tempfile, "/"); | |
305 | strcat (tempfile, "detmp.XXX"); | |
306 | mktemp (tempfile); | |
307 | ||
308 | outfilefd = creat (tempfile, S_IREAD | S_IWRITE); | |
309 | if (outfilefd < 0) | |
310 | { | |
311 | close (filefd); | |
312 | report_file_error ("Opening process output file", Fcons (tempfile, Qnil)); | |
313 | } | |
314 | #endif | |
315 | ||
80856e74 | 316 | if (XTYPE (buffer) == Lisp_Int) |
5437e9f9 | 317 | fd[1] = open (NULL_DEVICE, O_WRONLY), fd[0] = -1; |
80856e74 JB |
318 | else |
319 | { | |
7e6c2178 | 320 | #ifndef MSDOS |
80856e74 | 321 | pipe (fd); |
7e6c2178 | 322 | #endif |
80856e74 JB |
323 | #if 0 |
324 | /* Replaced by close_process_descs */ | |
325 | set_exclusive_use (fd[0]); | |
326 | #endif | |
327 | } | |
328 | ||
329 | { | |
330 | /* child_setup must clobber environ in systems with true vfork. | |
331 | Protect it from permanent change. */ | |
332 | register char **save_environ = environ; | |
333 | register int fd1 = fd[1]; | |
80856e74 JB |
334 | |
335 | #if 0 /* Some systems don't have sigblock. */ | |
e065a56e | 336 | mask = sigblock (sigmask (SIGCHLD)); |
80856e74 JB |
337 | #endif |
338 | ||
339 | /* Record that we're about to create a synchronous process. */ | |
340 | synch_process_alive = 1; | |
341 | ||
5c03767e RS |
342 | /* These vars record information from process termination. |
343 | Clear them now before process can possibly terminate, | |
344 | to avoid timing error if process terminates soon. */ | |
345 | synch_process_death = 0; | |
346 | synch_process_retcode = 0; | |
347 | ||
7e6c2178 | 348 | #ifdef MSDOS /* MW, July 1993 */ |
6b6e798b RS |
349 | /* ??? Someone who knows MSDOG needs to check whether this properly |
350 | closes all descriptors that it opens. */ | |
7e6c2178 RS |
351 | pid = run_msdos_command (new_argv, current_dir, filefd, outfilefd); |
352 | close (outfilefd); | |
353 | fd1 = -1; /* No harm in closing that one! */ | |
093650fe | 354 | fd[0] = open (tempfile, NILP (Vbinary_process_output) ? O_TEXT : O_BINARY); |
7e6c2178 RS |
355 | if (fd[0] < 0) |
356 | { | |
357 | unlink (tempfile); | |
6b6e798b | 358 | close (filefd); |
7e6c2178 RS |
359 | report_file_error ("Cannot re-open temporary file", Qnil); |
360 | } | |
361 | #else /* not MSDOS */ | |
80856e74 JB |
362 | pid = vfork (); |
363 | ||
364 | if (pid == 0) | |
365 | { | |
366 | if (fd[0] >= 0) | |
367 | close (fd[0]); | |
5a570e37 | 368 | #ifdef USG |
80856e74 JB |
369 | setpgrp (); |
370 | #else | |
371 | setpgrp (pid, pid); | |
372 | #endif /* USG */ | |
e576cab4 | 373 | child_setup (filefd, fd1, fd1, new_argv, 0, current_dir); |
80856e74 | 374 | } |
7e6c2178 | 375 | #endif /* not MSDOS */ |
80856e74 | 376 | |
80856e74 JB |
377 | environ = save_environ; |
378 | ||
6b6e798b RS |
379 | /* Close most of our fd's, but not fd[0] |
380 | since we will use that to read input from. */ | |
80856e74 | 381 | close (filefd); |
7e6c2178 RS |
382 | if (fd1 >= 0) |
383 | close (fd1); | |
80856e74 JB |
384 | } |
385 | ||
386 | if (pid < 0) | |
387 | { | |
6b6e798b RS |
388 | if (fd[0] >= 0) |
389 | close (fd[0]); | |
80856e74 JB |
390 | report_file_error ("Doing vfork", Qnil); |
391 | } | |
392 | ||
393 | if (XTYPE (buffer) == Lisp_Int) | |
394 | { | |
6b6e798b RS |
395 | if (fd[0] >= 0) |
396 | close (fd[0]); | |
80856e74 | 397 | #ifndef subprocesses |
e576cab4 JB |
398 | /* If Emacs has been built with asynchronous subprocess support, |
399 | we don't need to do this, I think because it will then have | |
400 | the facilities for handling SIGCHLD. */ | |
80856e74 JB |
401 | wait_without_blocking (); |
402 | #endif /* subprocesses */ | |
80856e74 JB |
403 | return Qnil; |
404 | } | |
405 | ||
6b6e798b | 406 | /* Enable sending signal if user quits below. */ |
37d54121 RS |
407 | call_process_exited = 0; |
408 | ||
7e6c2178 RS |
409 | #ifdef MSDOS |
410 | /* MSDOS needs different cleanup information. */ | |
411 | record_unwind_protect (call_process_cleanup, | |
412 | Fcons (make_number (fd[0]), build_string (tempfile))); | |
413 | #else | |
80856e74 JB |
414 | record_unwind_protect (call_process_cleanup, |
415 | Fcons (make_number (fd[0]), make_number (pid))); | |
7e6c2178 | 416 | #endif /* not MSDOS */ |
80856e74 JB |
417 | |
418 | ||
419 | if (XTYPE (buffer) == Lisp_Buffer) | |
420 | Fset_buffer (buffer); | |
421 | ||
422 | immediate_quit = 1; | |
423 | QUIT; | |
424 | ||
425 | { | |
426 | register int nread; | |
0ad477db | 427 | int first = 1; |
80856e74 JB |
428 | |
429 | while ((nread = read (fd[0], buf, sizeof buf)) > 0) | |
430 | { | |
431 | immediate_quit = 0; | |
012c6fcb | 432 | if (!NILP (buffer)) |
80856e74 | 433 | insert (buf, nread); |
012c6fcb | 434 | if (!NILP (display) && INTERACTIVE) |
0ad477db RS |
435 | { |
436 | if (first) | |
437 | prepare_menu_bars (); | |
438 | first = 0; | |
439 | redisplay_preserve_echo_area (); | |
440 | } | |
80856e74 JB |
441 | immediate_quit = 1; |
442 | QUIT; | |
443 | } | |
444 | } | |
445 | ||
446 | /* Wait for it to terminate, unless it already has. */ | |
447 | wait_for_termination (pid); | |
448 | ||
449 | immediate_quit = 0; | |
450 | ||
451 | set_buffer_internal (old); | |
452 | ||
37d54121 RS |
453 | /* Don't kill any children that the subprocess may have left behind |
454 | when exiting. */ | |
455 | call_process_exited = 1; | |
456 | ||
80856e74 JB |
457 | unbind_to (count, Qnil); |
458 | ||
80856e74 JB |
459 | if (synch_process_death) |
460 | return build_string (synch_process_death); | |
461 | return make_number (synch_process_retcode); | |
462 | } | |
463 | #endif | |
464 | \f | |
9fefd2ba | 465 | static Lisp_Object |
80856e74 JB |
466 | delete_temp_file (name) |
467 | Lisp_Object name; | |
468 | { | |
469 | unlink (XSTRING (name)->data); | |
470 | } | |
471 | ||
472 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
473 | 3, MANY, 0, | |
474 | "Send text from START to END to a synchronous process running PROGRAM.\n\ | |
475 | Delete the text if fourth arg DELETE is non-nil.\n\ | |
476 | Insert output in BUFFER before point; t means current buffer;\n\ | |
477 | nil for BUFFER means discard it; 0 means discard and don't wait.\n\ | |
478 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.\n\ | |
479 | Remaining args are passed to PROGRAM at startup as command args.\n\ | |
480 | If BUFFER is nil, returns immediately with value nil.\n\ | |
481 | Otherwise waits for PROGRAM to terminate\n\ | |
e576cab4 | 482 | and returns a numeric exit status or a signal description string.\n\ |
d177f194 | 483 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.") |
80856e74 JB |
484 | (nargs, args) |
485 | int nargs; | |
486 | register Lisp_Object *args; | |
487 | { | |
488 | register Lisp_Object filename_string, start, end; | |
7e6c2178 RS |
489 | #ifdef MSDOS |
490 | char *tempfile; | |
491 | #else | |
80856e74 | 492 | char tempfile[20]; |
7e6c2178 | 493 | #endif |
80856e74 | 494 | int count = specpdl_ptr - specpdl; |
7e6c2178 RS |
495 | #ifdef MSDOS |
496 | char *outf = '\0'; | |
497 | ||
498 | if ((outf = egetenv ("TMP")) || (outf = egetenv ("TEMP"))) | |
499 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); | |
500 | else | |
501 | { | |
502 | tempfile = alloca (20); | |
503 | *tempfile = '\0'; | |
504 | } | |
505 | dostounix_filename (tempfile); | |
506 | if (tempfile[strlen (tempfile) - 1] != '/') | |
507 | strcat (tempfile, "/"); | |
508 | strcat (tempfile, "detmp.XXX"); | |
509 | #else /* not MSDOS */ | |
80856e74 JB |
510 | |
511 | #ifdef VMS | |
512 | strcpy (tempfile, "tmp:emacsXXXXXX."); | |
513 | #else | |
514 | strcpy (tempfile, "/tmp/emacsXXXXXX"); | |
515 | #endif | |
7e6c2178 RS |
516 | #endif /* not MSDOS */ |
517 | ||
80856e74 JB |
518 | mktemp (tempfile); |
519 | ||
520 | filename_string = build_string (tempfile); | |
521 | start = args[0]; | |
522 | end = args[1]; | |
093650fe RS |
523 | #ifdef MSDOS |
524 | specbind (Qbuffer_file_type, Vbinary_process_input); | |
525 | Fwrite_region (start, end, filename_string, Qnil, Qlambda); | |
526 | unbind_to (count, Qnil); | |
527 | #else | |
80856e74 | 528 | Fwrite_region (start, end, filename_string, Qnil, Qlambda); |
093650fe RS |
529 | #endif |
530 | ||
80856e74 JB |
531 | record_unwind_protect (delete_temp_file, filename_string); |
532 | ||
012c6fcb | 533 | if (!NILP (args[3])) |
80856e74 JB |
534 | Fdelete_region (start, end); |
535 | ||
536 | args[3] = filename_string; | |
80856e74 | 537 | |
58616e67 | 538 | return unbind_to (count, Fcall_process (nargs - 2, args + 2)); |
80856e74 JB |
539 | } |
540 | \f | |
541 | #ifndef VMS /* VMS version is in vmsproc.c. */ | |
542 | ||
543 | /* This is the last thing run in a newly forked inferior | |
544 | either synchronous or asynchronous. | |
545 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
546 | Initialize inferior's priority, pgrp, connected dir and environment. | |
547 | then exec another program based on new_argv. | |
548 | ||
549 | This function may change environ for the superior process. | |
550 | Therefore, the superior process must save and restore the value | |
551 | of environ around the vfork and the call to this function. | |
552 | ||
553 | ENV is the environment for the subprocess. | |
554 | ||
555 | SET_PGRP is nonzero if we should put the subprocess into a separate | |
e576cab4 JB |
556 | process group. |
557 | ||
558 | CURRENT_DIR is an elisp string giving the path of the current | |
559 | directory the subprocess should have. Since we can't really signal | |
560 | a decent error from within the child, this should be verified as an | |
561 | executable directory by the parent. */ | |
80856e74 | 562 | |
e576cab4 | 563 | child_setup (in, out, err, new_argv, set_pgrp, current_dir) |
80856e74 JB |
564 | int in, out, err; |
565 | register char **new_argv; | |
80856e74 | 566 | int set_pgrp; |
e576cab4 | 567 | Lisp_Object current_dir; |
80856e74 | 568 | { |
7e6c2178 RS |
569 | #ifdef MSDOS |
570 | /* The MSDOS port of gcc cannot fork, vfork, ... so we must call system | |
571 | instead. */ | |
572 | #else /* not MSDOS */ | |
e576cab4 JB |
573 | char **env; |
574 | ||
33abe2d9 | 575 | int pid = getpid (); |
80856e74 | 576 | |
68d10241 | 577 | #ifdef SET_EMACS_PRIORITY |
4f0b9d49 JB |
578 | { |
579 | extern int emacs_priority; | |
580 | ||
68d10241 RS |
581 | if (emacs_priority < 0) |
582 | nice (- emacs_priority); | |
4f0b9d49 | 583 | } |
5b633aeb | 584 | #endif |
80856e74 JB |
585 | |
586 | #ifdef subprocesses | |
587 | /* Close Emacs's descriptors that this process should not have. */ | |
588 | close_process_descs (); | |
589 | #endif | |
4458cebe | 590 | close_load_descs (); |
80856e74 JB |
591 | |
592 | /* Note that use of alloca is always safe here. It's obvious for systems | |
593 | that do not have true vfork or that have true (stack) alloca. | |
594 | If using vfork and C_ALLOCA it is safe because that changes | |
595 | the superior's static variables as if the superior had done alloca | |
596 | and will be cleaned up in the usual way. */ | |
e576cab4 JB |
597 | { |
598 | register unsigned char *temp; | |
599 | register int i; | |
77d78be1 | 600 | |
e576cab4 JB |
601 | i = XSTRING (current_dir)->size; |
602 | temp = (unsigned char *) alloca (i + 2); | |
603 | bcopy (XSTRING (current_dir)->data, temp, i); | |
604 | if (temp[i - 1] != '/') temp[i++] = '/'; | |
605 | temp[i] = 0; | |
606 | ||
607 | /* We can't signal an Elisp error here; we're in a vfork. Since | |
608 | the callers check the current directory before forking, this | |
609 | should only return an error if the directory's permissions | |
610 | are changed between the check and this chdir, but we should | |
611 | at least check. */ | |
612 | if (chdir (temp) < 0) | |
613 | exit (errno); | |
614 | } | |
80856e74 | 615 | |
80856e74 JB |
616 | /* Set `env' to a vector of the strings in Vprocess_environment. */ |
617 | { | |
618 | register Lisp_Object tem; | |
619 | register char **new_env; | |
620 | register int new_length; | |
621 | ||
622 | new_length = 0; | |
623 | for (tem = Vprocess_environment; | |
624 | (XTYPE (tem) == Lisp_Cons | |
625 | && XTYPE (XCONS (tem)->car) == Lisp_String); | |
626 | tem = XCONS (tem)->cdr) | |
627 | new_length++; | |
628 | ||
cd9565ba | 629 | /* new_length + 1 to include terminating 0. */ |
80856e74 JB |
630 | env = new_env = (char **) alloca ((new_length + 1) * sizeof (char *)); |
631 | ||
cd9565ba | 632 | /* Copy the Vprocess_environment strings into new_env. */ |
80856e74 JB |
633 | for (tem = Vprocess_environment; |
634 | (XTYPE (tem) == Lisp_Cons | |
635 | && XTYPE (XCONS (tem)->car) == Lisp_String); | |
636 | tem = XCONS (tem)->cdr) | |
cd9565ba RS |
637 | { |
638 | char **ep = env; | |
639 | char *string = (char *) XSTRING (XCONS (tem)->car)->data; | |
640 | /* See if this string duplicates any string already in the env. | |
641 | If so, don't put it in. | |
642 | When an env var has multiple definitions, | |
643 | we keep the definition that comes first in process-environment. */ | |
644 | for (; ep != new_env; ep++) | |
645 | { | |
646 | char *p = *ep, *q = string; | |
647 | while (1) | |
648 | { | |
649 | if (*q == 0) | |
650 | /* The string is malformed; might as well drop it. */ | |
651 | goto duplicate; | |
652 | if (*q != *p) | |
653 | break; | |
654 | if (*q == '=') | |
655 | goto duplicate; | |
656 | p++, q++; | |
657 | } | |
658 | } | |
659 | *new_env++ = string; | |
660 | duplicate: ; | |
661 | } | |
80856e74 JB |
662 | *new_env = 0; |
663 | } | |
80856e74 | 664 | |
426b37ae JB |
665 | /* Make sure that in, out, and err are not actually already in |
666 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 667 | started with its standard in, out, or error closed, as might |
426b37ae JB |
668 | happen under X. */ |
669 | in = relocate_fd (in, 3); | |
3e9367e7 KH |
670 | if (out == err) |
671 | err = out = relocate_fd (out, 3); | |
672 | else | |
673 | { | |
674 | out = relocate_fd (out, 3); | |
675 | err = relocate_fd (err, 3); | |
676 | } | |
426b37ae | 677 | |
80856e74 JB |
678 | close (0); |
679 | close (1); | |
680 | close (2); | |
681 | ||
682 | dup2 (in, 0); | |
683 | dup2 (out, 1); | |
684 | dup2 (err, 2); | |
685 | close (in); | |
686 | close (out); | |
687 | close (err); | |
688 | ||
fdba8590 RS |
689 | #ifdef USG |
690 | #ifndef SETPGRP_RELEASES_CTTY | |
e576cab4 | 691 | setpgrp (); /* No arguments but equivalent in this case */ |
fdba8590 | 692 | #endif |
e576cab4 JB |
693 | #else |
694 | setpgrp (pid, pid); | |
695 | #endif /* USG */ | |
a129418f RS |
696 | /* setpgrp_of_tty is incorrect here; it uses input_fd. */ |
697 | EMACS_SET_TTY_PGRP (0, &pid); | |
80856e74 JB |
698 | |
699 | #ifdef vipc | |
700 | something missing here; | |
701 | #endif /* vipc */ | |
702 | ||
703 | /* execvp does not accept an environment arg so the only way | |
704 | to pass this environment is to set environ. Our caller | |
705 | is responsible for restoring the ambient value of environ. */ | |
706 | environ = env; | |
707 | execvp (new_argv[0], new_argv); | |
708 | ||
709 | write (1, "Couldn't exec the program ", 26); | |
710 | write (1, new_argv[0], strlen (new_argv[0])); | |
711 | _exit (1); | |
7e6c2178 | 712 | #endif /* not MSDOS */ |
80856e74 JB |
713 | } |
714 | ||
426b37ae JB |
715 | /* Move the file descriptor FD so that its number is not less than MIN. |
716 | If the file descriptor is moved at all, the original is freed. */ | |
717 | int | |
718 | relocate_fd (fd, min) | |
719 | int fd, min; | |
720 | { | |
721 | if (fd >= min) | |
722 | return fd; | |
723 | else | |
724 | { | |
725 | int new = dup (fd); | |
726 | if (new == -1) | |
727 | { | |
20c018a0 | 728 | char *message1 = "Error while setting up child: "; |
826c56ac | 729 | char *errmessage = strerror (errno); |
20c018a0 JB |
730 | char *message2 = "\n"; |
731 | write (2, message1, strlen (message1)); | |
826c56ac | 732 | write (2, errmessage, strlen (errmessage)); |
20c018a0 | 733 | write (2, message2, strlen (message2)); |
426b37ae JB |
734 | _exit (1); |
735 | } | |
736 | /* Note that we hold the original FD open while we recurse, | |
737 | to guarantee we'll get a new FD if we need it. */ | |
738 | new = relocate_fd (new, min); | |
739 | close (fd); | |
740 | return new; | |
741 | } | |
742 | } | |
743 | ||
012c6fcb JA |
744 | static int |
745 | getenv_internal (var, varlen, value, valuelen) | |
746 | char *var; | |
747 | int varlen; | |
748 | char **value; | |
749 | int *valuelen; | |
750 | { | |
751 | Lisp_Object scan; | |
752 | ||
753 | for (scan = Vprocess_environment; CONSP (scan); scan = XCONS (scan)->cdr) | |
754 | { | |
c1350752 KH |
755 | Lisp_Object entry; |
756 | ||
757 | entry = XCONS (scan)->car; | |
012c6fcb JA |
758 | if (XTYPE (entry) == Lisp_String |
759 | && XSTRING (entry)->size > varlen | |
760 | && XSTRING (entry)->data[varlen] == '=' | |
761 | && ! bcmp (XSTRING (entry)->data, var, varlen)) | |
762 | { | |
763 | *value = (char *) XSTRING (entry)->data + (varlen + 1); | |
764 | *valuelen = XSTRING (entry)->size - (varlen + 1); | |
765 | return 1; | |
766 | } | |
767 | } | |
768 | ||
769 | return 0; | |
770 | } | |
771 | ||
0ad477db | 772 | DEFUN ("getenv", Fgetenv, Sgetenv, 1, 1, 0, |
012c6fcb JA |
773 | "Return the value of environment variable VAR, as a string.\n\ |
774 | VAR should be a string. Value is nil if VAR is undefined in the environment.\n\ | |
775 | This function consults the variable ``process-environment'' for its value.") | |
776 | (var) | |
777 | Lisp_Object var; | |
778 | { | |
779 | char *value; | |
780 | int valuelen; | |
781 | ||
782 | CHECK_STRING (var, 0); | |
783 | if (getenv_internal (XSTRING (var)->data, XSTRING (var)->size, | |
784 | &value, &valuelen)) | |
785 | return make_string (value, valuelen); | |
786 | else | |
787 | return Qnil; | |
788 | } | |
789 | ||
790 | /* A version of getenv that consults process_environment, easily | |
e576cab4 | 791 | callable from C. */ |
012c6fcb JA |
792 | char * |
793 | egetenv (var) | |
e576cab4 | 794 | char *var; |
012c6fcb JA |
795 | { |
796 | char *value; | |
797 | int valuelen; | |
798 | ||
799 | if (getenv_internal (var, strlen (var), &value, &valuelen)) | |
800 | return value; | |
801 | else | |
802 | return 0; | |
803 | } | |
804 | ||
80856e74 JB |
805 | #endif /* not VMS */ |
806 | \f | |
8de15d69 | 807 | /* This is run before init_cmdargs. */ |
7e6c2178 | 808 | |
8de15d69 RS |
809 | init_callproc_1 () |
810 | { | |
811 | char *data_dir = egetenv ("EMACSDATA"); | |
35a2f4b8 KH |
812 | char *doc_dir = egetenv ("EMACSDOC"); |
813 | ||
8de15d69 | 814 | Vdata_directory |
7e6c2178 | 815 | = Ffile_name_as_directory (build_string (data_dir ? data_dir |
8de15d69 | 816 | : PATH_DATA)); |
35a2f4b8 KH |
817 | Vdoc_directory |
818 | = Ffile_name_as_directory (build_string (doc_dir ? doc_dir | |
819 | : PATH_DOC)); | |
9453ea7b | 820 | |
e576cab4 JB |
821 | /* Check the EMACSPATH environment variable, defaulting to the |
822 | PATH_EXEC path from paths.h. */ | |
823 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); | |
80856e74 JB |
824 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
825 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
8de15d69 RS |
826 | } |
827 | ||
828 | /* This is run after init_cmdargs, so that Vinvocation_directory is valid. */ | |
829 | ||
830 | init_callproc () | |
831 | { | |
832 | char *data_dir = egetenv ("EMACSDATA"); | |
833 | ||
834 | register char * sh; | |
835 | Lisp_Object tempdir; | |
836 | ||
093650fe | 837 | #ifndef MSDOS |
05630743 | 838 | if (initialized && !NILP (Vinstallation_directory)) |
8de15d69 | 839 | { |
05630743 RS |
840 | /* Add to the path the lib-src subdir of the installation dir. */ |
841 | Lisp_Object tem; | |
842 | tem = Fexpand_file_name (build_string ("lib-src"), | |
843 | Vinstallation_directory); | |
844 | if (NILP (Fmember (tem, Vexec_path))) | |
8de15d69 RS |
845 | { |
846 | Vexec_path = nconc2 (Vexec_path, Fcons (tem, Qnil)); | |
847 | Vexec_directory = Ffile_name_as_directory (tem); | |
848 | ||
849 | /* If we use ../lib-src, maybe use ../etc as well. | |
850 | Do so if ../etc exists and has our DOC-... file in it. */ | |
851 | if (data_dir == 0) | |
852 | { | |
05630743 RS |
853 | tem = Fexpand_file_name (build_string ("etc"), |
854 | Vinstallation_directory); | |
7e933683 | 855 | Vdoc_directory = Ffile_name_as_directory (tem); |
8de15d69 RS |
856 | } |
857 | } | |
858 | } | |
7e933683 RS |
859 | |
860 | /* Look for the files that should be in etc. We don't use | |
861 | Vinstallation_directory, because these files are never installed | |
862 | in /bin near the executable, and they are never in the build | |
863 | directory when that's different from the source directory. | |
864 | ||
865 | Instead, if these files are not in the nominal place, we try the | |
866 | source directory. */ | |
867 | if (data_dir == 0) | |
868 | { | |
869 | Lisp_Object tem, tem1, newdir; | |
870 | ||
871 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); | |
872 | tem1 = Ffile_exists_p (tem); | |
873 | if (NILP (tem1)) | |
874 | { | |
875 | newdir = Fexpand_file_name (build_string ("../etc/"), | |
876 | build_string (PATH_DUMPLOADSEARCH)); | |
877 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
878 | tem1 = Ffile_exists_p (tem); | |
879 | if (!NILP (tem1)) | |
880 | Vdata_directory = newdir; | |
881 | } | |
882 | } | |
093650fe | 883 | #endif |
80856e74 | 884 | |
e576cab4 JB |
885 | tempdir = Fdirectory_file_name (Vexec_directory); |
886 | if (access (XSTRING (tempdir)->data, 0) < 0) | |
80856e74 | 887 | { |
0af6a831 RS |
888 | fprintf (stderr, |
889 | "Warning: arch-dependent data dir (%s) does not exist.\n", | |
890 | XSTRING (Vexec_directory)->data); | |
80856e74 JB |
891 | sleep (2); |
892 | } | |
893 | ||
e576cab4 JB |
894 | tempdir = Fdirectory_file_name (Vdata_directory); |
895 | if (access (XSTRING (tempdir)->data, 0) < 0) | |
896 | { | |
0af6a831 RS |
897 | fprintf (stderr, |
898 | "Warning: arch-independent data dir (%s) does not exist.\n", | |
899 | XSTRING (Vdata_directory)->data); | |
e576cab4 JB |
900 | sleep (2); |
901 | } | |
902 | ||
80856e74 JB |
903 | #ifdef VMS |
904 | Vshell_file_name = build_string ("*dcl*"); | |
905 | #else | |
e576cab4 | 906 | sh = (char *) getenv ("SHELL"); |
80856e74 JB |
907 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
908 | #endif | |
9fefd2ba JB |
909 | } |
910 | ||
911 | set_process_environment () | |
912 | { | |
913 | register char **envp; | |
80856e74 | 914 | |
80856e74 JB |
915 | Vprocess_environment = Qnil; |
916 | #ifndef CANNOT_DUMP | |
917 | if (initialized) | |
918 | #endif | |
919 | for (envp = environ; *envp; envp++) | |
920 | Vprocess_environment = Fcons (build_string (*envp), | |
921 | Vprocess_environment); | |
80856e74 JB |
922 | } |
923 | ||
924 | syms_of_callproc () | |
925 | { | |
7e6c2178 | 926 | #ifdef MSDOS |
093650fe RS |
927 | Qbuffer_file_type = intern ("buffer-file-type"); |
928 | staticpro (&Qbuffer_file_type); | |
929 | ||
930 | DEFVAR_LISP ("binary-process-input", &Vbinary_process_input, | |
931 | "*If non-nil then new subprocesses are assumed to take binary input."); | |
932 | Vbinary_process_input = Qnil; | |
933 | ||
934 | DEFVAR_LISP ("binary-process-output", &Vbinary_process_output, | |
7e6c2178 | 935 | "*If non-nil then new subprocesses are assumed to produce binary output."); |
093650fe | 936 | Vbinary_process_output = Qnil; |
7e6c2178 RS |
937 | #endif |
938 | ||
80856e74 JB |
939 | DEFVAR_LISP ("shell-file-name", &Vshell_file_name, |
940 | "*File name to load inferior shells from.\n\ | |
941 | Initialized from the SHELL environment variable."); | |
942 | ||
943 | DEFVAR_LISP ("exec-path", &Vexec_path, | |
944 | "*List of directories to search programs to run in subprocesses.\n\ | |
945 | Each element is a string (directory name) or nil (try default directory)."); | |
946 | ||
947 | DEFVAR_LISP ("exec-directory", &Vexec_directory, | |
e576cab4 JB |
948 | "Directory of architecture-dependent files that come with GNU Emacs,\n\ |
949 | especially executable programs intended for Emacs to invoke."); | |
950 | ||
951 | DEFVAR_LISP ("data-directory", &Vdata_directory, | |
952 | "Directory of architecture-independent files that come with GNU Emacs,\n\ | |
953 | intended for Emacs to use."); | |
80856e74 | 954 | |
35a2f4b8 KH |
955 | DEFVAR_LISP ("doc-directory", &Vdoc_directory, |
956 | "Directory containing the DOC file that comes with GNU Emacs.\n\ | |
957 | This is usually the same as data-directory."); | |
958 | ||
ed61592a JB |
959 | DEFVAR_LISP ("configure-info-directory", &Vconfigure_info_directory, |
960 | "For internal use by the build procedure only.\n\ | |
961 | This is the name of the directory in which the build procedure installed\n\ | |
962 | Emacs's info files; the default value for Info-default-directory-list\n\ | |
963 | includes this."); | |
964 | Vconfigure_info_directory = build_string (PATH_INFO); | |
965 | ||
80856e74 | 966 | DEFVAR_LISP ("process-environment", &Vprocess_environment, |
e576cab4 JB |
967 | "List of environment variables for subprocesses to inherit.\n\ |
968 | Each element should be a string of the form ENVVARNAME=VALUE.\n\ | |
969 | The environment which Emacs inherits is placed in this variable\n\ | |
970 | when Emacs starts."); | |
80856e74 JB |
971 | |
972 | #ifndef VMS | |
973 | defsubr (&Scall_process); | |
012c6fcb | 974 | defsubr (&Sgetenv); |
986ffb24 | 975 | #endif |
e576cab4 | 976 | defsubr (&Scall_process_region); |
80856e74 | 977 | } |