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80856e74 | 1 | /* Synchronous subprocess invocation for GNU Emacs. |
91bac16a | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1992 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 | |
8 | the Free Software Foundation; either version 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include <signal.h> | |
77d78be1 | 22 | #include <errno.h> |
80856e74 JB |
23 | |
24 | #include "config.h" | |
25 | ||
26 | /* Define SIGCHLD as an alias for SIGCLD. */ | |
27 | ||
28 | #if !defined (SIGCHLD) && defined (SIGCLD) | |
29 | #define SIGCHLD SIGCLD | |
30 | #endif /* SIGCLD */ | |
31 | ||
32 | #include <sys/types.h> | |
33 | #define PRIO_PROCESS 0 | |
34 | #include <sys/file.h> | |
35 | #ifdef USG5 | |
36 | #include <fcntl.h> | |
37 | #endif | |
38 | ||
39 | #ifndef O_RDONLY | |
40 | #define O_RDONLY 0 | |
41 | #endif | |
42 | ||
43 | #ifndef O_WRONLY | |
44 | #define O_WRONLY 1 | |
45 | #endif | |
46 | ||
47 | #include "lisp.h" | |
48 | #include "commands.h" | |
49 | #include "buffer.h" | |
50 | #include "paths.h" | |
51 | #include "process.h" | |
52 | ||
53 | #ifdef VMS | |
54 | extern noshare char **environ; | |
55 | #else | |
56 | extern char **environ; | |
57 | #endif | |
58 | ||
59 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
60 | ||
9453ea7b | 61 | Lisp_Object Vexec_path, Vexec_directory, Vdata_directory; |
80856e74 JB |
62 | |
63 | Lisp_Object Vshell_file_name; | |
64 | ||
80856e74 | 65 | Lisp_Object Vprocess_environment; |
80856e74 JB |
66 | |
67 | /* True iff we are about to fork off a synchronous process or if we | |
68 | are waiting for it. */ | |
69 | int synch_process_alive; | |
70 | ||
71 | /* Nonzero => this is a string explaining death of synchronous subprocess. */ | |
72 | char *synch_process_death; | |
73 | ||
74 | /* If synch_process_death is zero, | |
75 | this is exit code of synchronous subprocess. */ | |
76 | int synch_process_retcode; | |
77 | \f | |
78 | #ifndef VMS /* VMS version is in vmsproc.c. */ | |
79 | ||
80 | Lisp_Object | |
81 | call_process_cleanup (fdpid) | |
82 | Lisp_Object fdpid; | |
83 | { | |
84 | register Lisp_Object fd, pid; | |
85 | fd = Fcar (fdpid); | |
86 | pid = Fcdr (fdpid); | |
87 | close (XFASTINT (fd)); | |
88 | kill (XFASTINT (pid), SIGKILL); | |
89 | synch_process_alive = 0; | |
90 | return Qnil; | |
91 | } | |
92 | ||
93 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, | |
94 | "Call PROGRAM synchronously in separate process.\n\ | |
95 | The program's input comes from file INFILE (nil means `/dev/null').\n\ | |
96 | Insert output in BUFFER before point; t means current buffer;\n\ | |
97 | nil for BUFFER means discard it; 0 means discard and don't wait.\n\ | |
98 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.\n\ | |
99 | Remaining arguments are strings passed as command arguments to PROGRAM.\n\ | |
100 | If BUFFER is nil or 0, returns immediately with value nil.\n\ | |
101 | Otherwise waits for PROGRAM to terminate\n\ | |
102 | and returns a numeric exit status or a signal name as a string.\n\ | |
103 | If you quit, the process is killed with SIGKILL.") | |
104 | (nargs, args) | |
105 | int nargs; | |
106 | register Lisp_Object *args; | |
107 | { | |
77d78be1 | 108 | Lisp_Object display, infile, buffer, path, current_dir; |
80856e74 JB |
109 | int fd[2]; |
110 | int filefd; | |
111 | register int pid; | |
112 | char buf[1024]; | |
113 | int count = specpdl_ptr - specpdl; | |
114 | register unsigned char **new_argv | |
115 | = (unsigned char **) alloca ((max (2, nargs - 2)) * sizeof (char *)); | |
116 | struct buffer *old = current_buffer; | |
117 | #if 0 | |
118 | int mask; | |
119 | #endif | |
80856e74 JB |
120 | CHECK_STRING (args[0], 0); |
121 | ||
77d78be1 JB |
122 | if (nargs >= 2 && ! NILP (args[1])) |
123 | { | |
124 | infile = Fexpand_file_name (args[1], current_buffer->directory); | |
125 | CHECK_STRING (infile, 1); | |
126 | } | |
80856e74 | 127 | else |
77d78be1 | 128 | infile = build_string ("/dev/null"); |
80856e74 JB |
129 | |
130 | { | |
131 | register Lisp_Object tem; | |
77d78be1 | 132 | if (nargs < 3) |
80856e74 | 133 | buffer = Qnil; |
77d78be1 | 134 | else |
80856e74 | 135 | { |
77d78be1 JB |
136 | buffer = tem = args[2]; |
137 | if (!(EQ (tem, Qnil) || EQ (tem, Qt) | |
138 | || XFASTINT (tem) == 0)) | |
139 | { | |
140 | buffer = Fget_buffer (tem); | |
141 | CHECK_BUFFER (buffer, 2); | |
142 | } | |
80856e74 JB |
143 | } |
144 | } | |
145 | ||
146 | display = nargs >= 3 ? args[3] : Qnil; | |
147 | ||
148 | { | |
149 | register int i; | |
150 | for (i = 4; i < nargs; i++) | |
151 | { | |
152 | CHECK_STRING (args[i], i); | |
153 | new_argv[i - 3] = XSTRING (args[i])->data; | |
154 | } | |
155 | /* Program name is first command arg */ | |
156 | new_argv[0] = XSTRING (args[0])->data; | |
157 | new_argv[i - 3] = 0; | |
158 | } | |
159 | ||
77d78be1 | 160 | filefd = open (XSTRING (infile)->data, O_RDONLY, 0); |
80856e74 JB |
161 | if (filefd < 0) |
162 | { | |
77d78be1 | 163 | report_file_error ("Opening process input file", Fcons (infile, Qnil)); |
80856e74 JB |
164 | } |
165 | /* Search for program; barf if not found. */ | |
166 | openp (Vexec_path, args[0], "", &path, 1); | |
efb859b4 | 167 | if (NILP (path)) |
80856e74 JB |
168 | { |
169 | close (filefd); | |
170 | report_file_error ("Searching for program", Fcons (args[0], Qnil)); | |
171 | } | |
172 | new_argv[0] = XSTRING (path)->data; | |
173 | ||
174 | if (XTYPE (buffer) == Lisp_Int) | |
175 | fd[1] = open ("/dev/null", O_WRONLY), fd[0] = -1; | |
176 | else | |
177 | { | |
178 | pipe (fd); | |
179 | #if 0 | |
180 | /* Replaced by close_process_descs */ | |
181 | set_exclusive_use (fd[0]); | |
182 | #endif | |
183 | } | |
184 | ||
77d78be1 JB |
185 | /* Make sure that the child will be able to chdir to the current |
186 | buffer's current directory. We can't just have the child check | |
187 | for an error when it does the chdir, since it's in a vfork. */ | |
188 | current_dir = expand_and_dir_to_file (current_buffer->directory, Qnil); | |
189 | if (NILP (Ffile_accessible_directory_p (current_dir))) | |
190 | report_file_error ("Setting current directory", | |
191 | Fcons (current_buffer->directory, Qnil)); | |
192 | ||
80856e74 JB |
193 | { |
194 | /* child_setup must clobber environ in systems with true vfork. | |
195 | Protect it from permanent change. */ | |
196 | register char **save_environ = environ; | |
197 | register int fd1 = fd[1]; | |
198 | char **env; | |
199 | ||
80856e74 | 200 | env = environ; |
80856e74 JB |
201 | |
202 | #if 0 /* Some systems don't have sigblock. */ | |
203 | mask = sigblock (sigmask (SIGCHLD)); | |
204 | #endif | |
205 | ||
206 | /* Record that we're about to create a synchronous process. */ | |
207 | synch_process_alive = 1; | |
208 | ||
209 | pid = vfork (); | |
210 | ||
211 | if (pid == 0) | |
212 | { | |
213 | if (fd[0] >= 0) | |
214 | close (fd[0]); | |
215 | #ifdef USG | |
216 | setpgrp (); | |
217 | #else | |
218 | setpgrp (pid, pid); | |
219 | #endif /* USG */ | |
77d78be1 | 220 | child_setup (filefd, fd1, fd1, new_argv, env, 0, current_dir); |
80856e74 JB |
221 | } |
222 | ||
223 | #if 0 | |
224 | /* Tell SIGCHLD handler to look for this pid. */ | |
225 | synch_process_pid = pid; | |
226 | /* Now let SIGCHLD come through. */ | |
227 | sigsetmask (mask); | |
228 | #endif | |
229 | ||
230 | environ = save_environ; | |
231 | ||
232 | close (filefd); | |
233 | close (fd1); | |
234 | } | |
235 | ||
236 | if (pid < 0) | |
237 | { | |
238 | close (fd[0]); | |
239 | report_file_error ("Doing vfork", Qnil); | |
240 | } | |
241 | ||
242 | if (XTYPE (buffer) == Lisp_Int) | |
243 | { | |
244 | #ifndef subprocesses | |
8cf9a8c6 JB |
245 | /* If Emacs has been built with asynchronous subprocess support, |
246 | we don't need to do this, I think because it will then have | |
247 | the facilities for handling SIGCHLD. */ | |
80856e74 JB |
248 | wait_without_blocking (); |
249 | #endif /* subprocesses */ | |
80856e74 JB |
250 | return Qnil; |
251 | } | |
252 | ||
b5752bd1 JB |
253 | synch_process_death = 0; |
254 | synch_process_retcode = 0; | |
255 | ||
80856e74 JB |
256 | record_unwind_protect (call_process_cleanup, |
257 | Fcons (make_number (fd[0]), make_number (pid))); | |
258 | ||
259 | ||
260 | if (XTYPE (buffer) == Lisp_Buffer) | |
261 | Fset_buffer (buffer); | |
262 | ||
263 | immediate_quit = 1; | |
264 | QUIT; | |
265 | ||
266 | { | |
267 | register int nread; | |
268 | ||
269 | while ((nread = read (fd[0], buf, sizeof buf)) > 0) | |
270 | { | |
271 | immediate_quit = 0; | |
efb859b4 | 272 | if (!NILP (buffer)) |
80856e74 | 273 | insert (buf, nread); |
efb859b4 | 274 | if (!NILP (display) && INTERACTIVE) |
80856e74 JB |
275 | redisplay_preserve_echo_area (); |
276 | immediate_quit = 1; | |
277 | QUIT; | |
278 | } | |
279 | } | |
280 | ||
281 | /* Wait for it to terminate, unless it already has. */ | |
282 | wait_for_termination (pid); | |
283 | ||
284 | immediate_quit = 0; | |
285 | ||
286 | set_buffer_internal (old); | |
287 | ||
288 | unbind_to (count, Qnil); | |
289 | ||
80856e74 JB |
290 | if (synch_process_death) |
291 | return build_string (synch_process_death); | |
292 | return make_number (synch_process_retcode); | |
293 | } | |
294 | #endif | |
295 | \f | |
296 | static void | |
297 | delete_temp_file (name) | |
298 | Lisp_Object name; | |
299 | { | |
300 | unlink (XSTRING (name)->data); | |
301 | } | |
302 | ||
303 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
304 | 3, MANY, 0, | |
305 | "Send text from START to END to a synchronous process running PROGRAM.\n\ | |
306 | Delete the text if fourth arg DELETE is non-nil.\n\ | |
307 | Insert output in BUFFER before point; t means current buffer;\n\ | |
308 | nil for BUFFER means discard it; 0 means discard and don't wait.\n\ | |
309 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.\n\ | |
310 | Remaining args are passed to PROGRAM at startup as command args.\n\ | |
311 | If BUFFER is nil, returns immediately with value nil.\n\ | |
312 | Otherwise waits for PROGRAM to terminate\n\ | |
313 | and returns a numeric exit status or a signal name as a string.\n\ | |
314 | If you quit, the process is killed with SIGKILL.") | |
315 | (nargs, args) | |
316 | int nargs; | |
317 | register Lisp_Object *args; | |
318 | { | |
319 | register Lisp_Object filename_string, start, end; | |
320 | char tempfile[20]; | |
321 | int count = specpdl_ptr - specpdl; | |
80856e74 JB |
322 | |
323 | #ifdef VMS | |
324 | strcpy (tempfile, "tmp:emacsXXXXXX."); | |
325 | #else | |
326 | strcpy (tempfile, "/tmp/emacsXXXXXX"); | |
327 | #endif | |
328 | mktemp (tempfile); | |
329 | ||
330 | filename_string = build_string (tempfile); | |
331 | start = args[0]; | |
332 | end = args[1]; | |
333 | Fwrite_region (start, end, filename_string, Qnil, Qlambda); | |
334 | record_unwind_protect (delete_temp_file, filename_string); | |
335 | ||
efb859b4 | 336 | if (!NILP (args[3])) |
80856e74 JB |
337 | Fdelete_region (start, end); |
338 | ||
339 | args[3] = filename_string; | |
340 | Fcall_process (nargs - 2, args + 2); | |
341 | ||
80856e74 JB |
342 | return unbind_to (count, Qnil); |
343 | } | |
344 | \f | |
345 | #ifndef VMS /* VMS version is in vmsproc.c. */ | |
346 | ||
347 | /* This is the last thing run in a newly forked inferior | |
348 | either synchronous or asynchronous. | |
349 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
350 | Initialize inferior's priority, pgrp, connected dir and environment. | |
351 | then exec another program based on new_argv. | |
352 | ||
353 | This function may change environ for the superior process. | |
354 | Therefore, the superior process must save and restore the value | |
355 | of environ around the vfork and the call to this function. | |
356 | ||
357 | ENV is the environment for the subprocess. | |
358 | ||
359 | SET_PGRP is nonzero if we should put the subprocess into a separate | |
77d78be1 JB |
360 | process group. |
361 | ||
362 | CURRENT_DIR is an elisp string giving the path of the current | |
363 | directory the subprocess should have. Since we can't really signal | |
364 | a decent error from within the child, this should be verified as an | |
365 | executable directory by the parent. */ | |
80856e74 | 366 | |
77d78be1 | 367 | child_setup (in, out, err, new_argv, env, set_pgrp, current_dir) |
80856e74 JB |
368 | int in, out, err; |
369 | register char **new_argv; | |
370 | char **env; | |
371 | int set_pgrp; | |
77d78be1 | 372 | Lisp_Object current_dir; |
80856e74 JB |
373 | { |
374 | register int pid = getpid(); | |
375 | ||
376 | setpriority (PRIO_PROCESS, pid, 0); | |
377 | ||
378 | #ifdef subprocesses | |
379 | /* Close Emacs's descriptors that this process should not have. */ | |
380 | close_process_descs (); | |
381 | #endif | |
382 | ||
383 | /* Note that use of alloca is always safe here. It's obvious for systems | |
384 | that do not have true vfork or that have true (stack) alloca. | |
385 | If using vfork and C_ALLOCA it is safe because that changes | |
386 | the superior's static variables as if the superior had done alloca | |
387 | and will be cleaned up in the usual way. */ | |
77d78be1 JB |
388 | { |
389 | register unsigned char *temp; | |
390 | register int i; | |
391 | ||
392 | i = XSTRING (current_dir)->size; | |
393 | temp = (unsigned char *) alloca (i + 2); | |
394 | bcopy (XSTRING (current_dir)->data, temp, i); | |
395 | if (temp[i - 1] != '/') temp[i++] = '/'; | |
396 | temp[i] = 0; | |
397 | ||
398 | /* We can't signal an Elisp error here; we're in a vfork. Since | |
399 | the callers check the current directory before forking, this | |
400 | should only return an error if the directory's permissions | |
401 | are changed between the check and this chdir, but we should | |
402 | at least check. */ | |
403 | if (chdir (temp) < 0) | |
404 | exit (errno); | |
405 | } | |
80856e74 | 406 | |
80856e74 JB |
407 | /* Set `env' to a vector of the strings in Vprocess_environment. */ |
408 | { | |
409 | register Lisp_Object tem; | |
410 | register char **new_env; | |
411 | register int new_length; | |
412 | ||
413 | new_length = 0; | |
414 | for (tem = Vprocess_environment; | |
415 | (XTYPE (tem) == Lisp_Cons | |
416 | && XTYPE (XCONS (tem)->car) == Lisp_String); | |
417 | tem = XCONS (tem)->cdr) | |
418 | new_length++; | |
419 | ||
420 | /* new_length + 1 to include terminating 0 */ | |
421 | env = new_env = (char **) alloca ((new_length + 1) * sizeof (char *)); | |
422 | ||
423 | /* Copy the env strings into new_env. */ | |
424 | for (tem = Vprocess_environment; | |
425 | (XTYPE (tem) == Lisp_Cons | |
426 | && XTYPE (XCONS (tem)->car) == Lisp_String); | |
427 | tem = XCONS (tem)->cdr) | |
428 | *new_env++ = (char *) XSTRING (XCONS (tem)->car)->data; | |
429 | *new_env = 0; | |
430 | } | |
80856e74 JB |
431 | |
432 | close (0); | |
433 | close (1); | |
434 | close (2); | |
435 | ||
436 | dup2 (in, 0); | |
437 | dup2 (out, 1); | |
438 | dup2 (err, 2); | |
439 | close (in); | |
440 | close (out); | |
441 | close (err); | |
442 | ||
91bac16a JB |
443 | #ifdef USG |
444 | setpgrp (); /* No arguments but equivalent in this case */ | |
445 | #else | |
446 | setpgrp (pid, pid); | |
447 | #endif /* USG */ | |
80856e74 JB |
448 | setpgrp_of_tty (pid); |
449 | ||
450 | #ifdef vipc | |
451 | something missing here; | |
452 | #endif /* vipc */ | |
453 | ||
454 | /* execvp does not accept an environment arg so the only way | |
455 | to pass this environment is to set environ. Our caller | |
456 | is responsible for restoring the ambient value of environ. */ | |
457 | environ = env; | |
458 | execvp (new_argv[0], new_argv); | |
459 | ||
460 | write (1, "Couldn't exec the program ", 26); | |
461 | write (1, new_argv[0], strlen (new_argv[0])); | |
462 | _exit (1); | |
463 | } | |
464 | ||
efb859b4 JB |
465 | static int |
466 | getenv_internal (var, varlen, value, valuelen) | |
467 | char *var; | |
468 | int varlen; | |
469 | char **value; | |
77d78be1 | 470 | int *valuelen; |
efb859b4 JB |
471 | { |
472 | Lisp_Object scan; | |
473 | ||
474 | for (scan = Vprocess_environment; CONSP (scan); scan = XCONS (scan)->cdr) | |
475 | { | |
476 | Lisp_Object entry = XCONS (scan)->car; | |
477 | ||
478 | if (XTYPE (entry) == Lisp_String | |
479 | && XSTRING (entry)->size > varlen | |
480 | && XSTRING (entry)->data[varlen] == '=' | |
481 | && ! bcmp (XSTRING (entry)->data, var, varlen)) | |
482 | { | |
77d78be1 | 483 | *value = (char *) XSTRING (entry)->data + (varlen + 1); |
efb859b4 JB |
484 | *valuelen = XSTRING (entry)->size - (varlen + 1); |
485 | return 1; | |
486 | } | |
487 | } | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
492 | DEFUN ("getenv", Fgetenv, Sgetenv, 1, 2, 0, | |
493 | "Return the value of environment variable VAR, as a string.\n\ | |
494 | VAR should be a string. Value is nil if VAR is undefined in the environment.\n\ | |
495 | This function consults the variable ``process-environment'' for its value.") | |
496 | (var) | |
497 | Lisp_Object var; | |
498 | { | |
499 | char *value; | |
500 | int valuelen; | |
501 | ||
502 | CHECK_STRING (var, 0); | |
503 | if (getenv_internal (XSTRING (var)->data, XSTRING (var)->size, | |
504 | &value, &valuelen)) | |
505 | return make_string (value, valuelen); | |
506 | else | |
507 | return Qnil; | |
508 | } | |
509 | ||
510 | /* A version of getenv that consults process_environment, easily | |
511 | callable from C. */ | |
512 | char * | |
513 | egetenv (var) | |
514 | { | |
515 | char *value; | |
516 | int valuelen; | |
517 | ||
518 | if (getenv_internal (var, strlen (var), &value, &valuelen)) | |
519 | return value; | |
520 | else | |
521 | return 0; | |
522 | } | |
523 | ||
80856e74 JB |
524 | #endif /* not VMS */ |
525 | \f | |
526 | init_callproc () | |
527 | { | |
528 | register char * sh; | |
529 | register char **envp; | |
9453ea7b JB |
530 | Lisp_Object tempdir; |
531 | ||
532 | Vdata_directory = Ffile_name_as_directory (build_string (PATH_DATA)); | |
80856e74 JB |
533 | |
534 | /* Turn PATH_EXEC into a path. `==' is just a string which we know | |
535 | will not be the name of an environment variable. */ | |
536 | Vexec_path = decode_env_path ("==", PATH_EXEC); | |
537 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); | |
538 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
539 | ||
9453ea7b JB |
540 | tempdir = Fdirectory_file_name (Vexec_directory); |
541 | if (access (XSTRING (tempdir)->data, 0) < 0) | |
80856e74 | 542 | { |
9453ea7b | 543 | printf ("Warning: arch-dependent data dir (%s) does not exist.\n", |
80856e74 JB |
544 | XSTRING (Vexec_directory)->data); |
545 | sleep (2); | |
546 | } | |
547 | ||
9453ea7b JB |
548 | tempdir = Fdirectory_file_name (Vdata_directory); |
549 | if (access (XSTRING (tempdir)->data, 0) < 0) | |
550 | { | |
551 | printf ("Warning: arch-independent data dir (%s) does not exist.\n", | |
552 | XSTRING (Vdata_directory)->data); | |
553 | sleep (2); | |
554 | } | |
555 | ||
80856e74 JB |
556 | #ifdef VMS |
557 | Vshell_file_name = build_string ("*dcl*"); | |
558 | #else | |
efb859b4 | 559 | sh = (char *) getenv ("SHELL"); |
80856e74 JB |
560 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
561 | #endif | |
562 | ||
80856e74 JB |
563 | Vprocess_environment = Qnil; |
564 | #ifndef CANNOT_DUMP | |
565 | if (initialized) | |
566 | #endif | |
567 | for (envp = environ; *envp; envp++) | |
568 | Vprocess_environment = Fcons (build_string (*envp), | |
569 | Vprocess_environment); | |
80856e74 JB |
570 | } |
571 | ||
572 | syms_of_callproc () | |
573 | { | |
574 | DEFVAR_LISP ("shell-file-name", &Vshell_file_name, | |
575 | "*File name to load inferior shells from.\n\ | |
576 | Initialized from the SHELL environment variable."); | |
577 | ||
578 | DEFVAR_LISP ("exec-path", &Vexec_path, | |
579 | "*List of directories to search programs to run in subprocesses.\n\ | |
580 | Each element is a string (directory name) or nil (try default directory)."); | |
581 | ||
582 | DEFVAR_LISP ("exec-directory", &Vexec_directory, | |
9453ea7b JB |
583 | "Directory of architecture-dependent files that come with GNU Emacs,\n\ |
584 | especially executable programs intended for Emacs to invoke."); | |
585 | ||
586 | DEFVAR_LISP ("data-directory", &Vdata_directory, | |
587 | "Directory of architecture-independent files that come with GNU Emacs,\n\ | |
588 | intended for Emacs to use."); | |
80856e74 | 589 | |
80856e74 | 590 | DEFVAR_LISP ("process-environment", &Vprocess_environment, |
efb859b4 JB |
591 | "List of environment variables for subprocesses to inherit.\n\ |
592 | Each element should be a string of the form ENVVARNAME=VALUE.\n\ | |
593 | The environment which Emacs inherits is placed in this variable\n\ | |
594 | when Emacs starts."); | |
80856e74 JB |
595 | |
596 | #ifndef VMS | |
597 | defsubr (&Scall_process); | |
598 | #endif | |
efb859b4 | 599 | defsubr (&Sgetenv); |
80856e74 JB |
600 | defsubr (&Scall_process_region); |
601 | } |