Commit | Line | Data |
---|---|---|
80856e74 | 1 | /* Synchronous subprocess invocation for GNU Emacs. |
f8c25f1b | 2 | Copyright (C) 1985, 86, 87, 88, 93, 94, 95 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> |
80856e74 | 23 | |
18160b98 | 24 | #include <config.h> |
565620a5 | 25 | #include <stdio.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 | ||
bad95d8f RS |
44 | #ifdef WINDOWSNT |
45 | #define NOMINMAX | |
46 | #include <windows.h> | |
47 | #include <stdlib.h> /* for proper declaration of environ */ | |
48 | #include <fcntl.h> | |
49 | #include "nt.h" | |
50 | #define _P_NOWAIT 1 /* from process.h */ | |
51 | #endif | |
52 | ||
7e6c2178 | 53 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
00353d4f | 54 | #include "msdos.h" |
472e83fe | 55 | #define INCLUDED_FCNTL |
7e6c2178 RS |
56 | #include <fcntl.h> |
57 | #include <sys/stat.h> | |
58 | #include <sys/param.h> | |
59 | #include <errno.h> | |
60 | #endif /* MSDOS */ | |
61 | ||
80856e74 JB |
62 | #ifndef O_RDONLY |
63 | #define O_RDONLY 0 | |
64 | #endif | |
65 | ||
66 | #ifndef O_WRONLY | |
67 | #define O_WRONLY 1 | |
68 | #endif | |
69 | ||
70 | #include "lisp.h" | |
71 | #include "commands.h" | |
72 | #include "buffer.h" | |
2a6b3537 | 73 | #include <paths.h> |
80856e74 | 74 | #include "process.h" |
d177f194 | 75 | #include "syssignal.h" |
a129418f | 76 | #include "systty.h" |
80856e74 JB |
77 | |
78 | #ifdef VMS | |
79 | extern noshare char **environ; | |
80 | #else | |
81 | extern char **environ; | |
82 | #endif | |
83 | ||
84 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
85 | ||
bad95d8f | 86 | #ifdef DOS_NT |
093650fe RS |
87 | /* When we are starting external processes we need to know whether they |
88 | take binary input (no conversion) or text input (\n is converted to | |
89 | \r\n). Similar for output: if newlines are written as \r\n then it's | |
90 | text process output, otherwise it's binary. */ | |
91 | Lisp_Object Vbinary_process_input; | |
92 | Lisp_Object Vbinary_process_output; | |
bad95d8f | 93 | #endif /* DOS_NT */ |
7e6c2178 | 94 | |
35a2f4b8 | 95 | Lisp_Object Vexec_path, Vexec_directory, Vdata_directory, Vdoc_directory; |
ed61592a | 96 | Lisp_Object Vconfigure_info_directory; |
80856e74 JB |
97 | |
98 | Lisp_Object Vshell_file_name; | |
99 | ||
80856e74 | 100 | Lisp_Object Vprocess_environment; |
80856e74 | 101 | |
bad95d8f | 102 | #ifdef DOS_NT |
093650fe | 103 | Lisp_Object Qbuffer_file_type; |
bad95d8f | 104 | #endif /* DOS_NT */ |
093650fe | 105 | |
80856e74 JB |
106 | /* True iff we are about to fork off a synchronous process or if we |
107 | are waiting for it. */ | |
108 | int synch_process_alive; | |
109 | ||
110 | /* Nonzero => this is a string explaining death of synchronous subprocess. */ | |
111 | char *synch_process_death; | |
112 | ||
113 | /* If synch_process_death is zero, | |
114 | this is exit code of synchronous subprocess. */ | |
115 | int synch_process_retcode; | |
8de15d69 RS |
116 | |
117 | extern Lisp_Object Vdoc_file_name; | |
80856e74 | 118 | \f |
37d54121 RS |
119 | /* Clean up when exiting Fcall_process. |
120 | On MSDOS, delete the temporary file on any kind of termination. | |
121 | On Unix, kill the process and any children on termination by signal. */ | |
122 | ||
123 | /* Nonzero if this is termination due to exit. */ | |
124 | static int call_process_exited; | |
125 | ||
80856e74 JB |
126 | #ifndef VMS /* VMS version is in vmsproc.c. */ |
127 | ||
d177f194 JB |
128 | static Lisp_Object |
129 | call_process_kill (fdpid) | |
130 | Lisp_Object fdpid; | |
131 | { | |
132 | close (XFASTINT (Fcar (fdpid))); | |
133 | EMACS_KILLPG (XFASTINT (Fcdr (fdpid)), SIGKILL); | |
134 | synch_process_alive = 0; | |
135 | return Qnil; | |
136 | } | |
137 | ||
80856e74 JB |
138 | Lisp_Object |
139 | call_process_cleanup (fdpid) | |
140 | Lisp_Object fdpid; | |
141 | { | |
7e6c2178 RS |
142 | #ifdef MSDOS |
143 | /* for MSDOS fdpid is really (fd . tempfile) */ | |
c1350752 KH |
144 | register Lisp_Object file; |
145 | file = Fcdr (fdpid); | |
7e6c2178 RS |
146 | close (XFASTINT (Fcar (fdpid))); |
147 | if (strcmp (XSTRING (file)-> data, NULL_DEVICE) != 0) | |
148 | unlink (XSTRING (file)->data); | |
149 | #else /* not MSDOS */ | |
d177f194 JB |
150 | register int pid = XFASTINT (Fcdr (fdpid)); |
151 | ||
6b6e798b | 152 | |
37d54121 | 153 | if (call_process_exited) |
6b6e798b RS |
154 | { |
155 | close (XFASTINT (Fcar (fdpid))); | |
156 | return Qnil; | |
157 | } | |
37d54121 | 158 | |
d177f194 JB |
159 | if (EMACS_KILLPG (pid, SIGINT) == 0) |
160 | { | |
161 | int count = specpdl_ptr - specpdl; | |
162 | record_unwind_protect (call_process_kill, fdpid); | |
163 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); | |
164 | immediate_quit = 1; | |
165 | QUIT; | |
166 | wait_for_termination (pid); | |
167 | immediate_quit = 0; | |
168 | specpdl_ptr = specpdl + count; /* Discard the unwind protect. */ | |
169 | message1 ("Waiting for process to die...done"); | |
170 | } | |
80856e74 | 171 | synch_process_alive = 0; |
d177f194 | 172 | close (XFASTINT (Fcar (fdpid))); |
7e6c2178 | 173 | #endif /* not MSDOS */ |
80856e74 JB |
174 | return Qnil; |
175 | } | |
176 | ||
177 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, | |
178 | "Call PROGRAM synchronously in separate process.\n\ | |
179 | The program's input comes from file INFILE (nil means `/dev/null').\n\ | |
180 | Insert output in BUFFER before point; t means current buffer;\n\ | |
181 | nil for BUFFER means discard it; 0 means discard and don't wait.\n\ | |
39eaa782 RS |
182 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,\n\ |
183 | REAL-BUFFER says what to do with standard output, as above,\n\ | |
184 | while STDERR-FILE says what to do with standard error in the child.\n\ | |
185 | STDERR-FILE may be nil (discard standard error output),\n\ | |
186 | t (mix it with ordinary output), or a file name string.\n\ | |
187 | \n\ | |
80856e74 JB |
188 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.\n\ |
189 | Remaining arguments are strings passed as command arguments to PROGRAM.\n\ | |
39eaa782 RS |
190 | \n\ |
191 | If BUFFER is 0, `call-process' returns immediately with value nil.\n\ | |
192 | Otherwise it waits for PROGRAM to terminate\n\ | |
e576cab4 | 193 | and returns a numeric exit status or a signal description string.\n\ |
d177f194 | 194 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.") |
80856e74 JB |
195 | (nargs, args) |
196 | int nargs; | |
197 | register Lisp_Object *args; | |
198 | { | |
58616e67 | 199 | Lisp_Object infile, buffer, current_dir, display, path; |
80856e74 JB |
200 | int fd[2]; |
201 | int filefd; | |
202 | register int pid; | |
6e3bfbb2 RS |
203 | char buf[16384]; |
204 | char *bufptr = buf; | |
205 | int bufsize = 16384; | |
80856e74 JB |
206 | int count = specpdl_ptr - specpdl; |
207 | register unsigned char **new_argv | |
208 | = (unsigned char **) alloca ((max (2, nargs - 2)) * sizeof (char *)); | |
209 | struct buffer *old = current_buffer; | |
39eaa782 RS |
210 | /* File to use for stderr in the child. |
211 | t means use same as standard output. */ | |
212 | Lisp_Object error_file; | |
7e6c2178 RS |
213 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
214 | char *outf, *tempfile; | |
215 | int outfilefd; | |
216 | #endif | |
80856e74 JB |
217 | #if 0 |
218 | int mask; | |
219 | #endif | |
80856e74 JB |
220 | CHECK_STRING (args[0], 0); |
221 | ||
39eaa782 RS |
222 | error_file = Qt; |
223 | ||
7e6c2178 RS |
224 | #ifndef subprocesses |
225 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
d50d3dc8 | 226 | if (nargs >= 3 && INTEGERP (args[2])) |
7e6c2178 RS |
227 | error ("Operating system cannot handle asynchronous subprocesses"); |
228 | #endif /* subprocesses */ | |
229 | ||
e576cab4 JB |
230 | if (nargs >= 2 && ! NILP (args[1])) |
231 | { | |
232 | infile = Fexpand_file_name (args[1], current_buffer->directory); | |
233 | CHECK_STRING (infile, 1); | |
234 | } | |
80856e74 | 235 | else |
5437e9f9 | 236 | infile = build_string (NULL_DEVICE); |
80856e74 | 237 | |
e576cab4 JB |
238 | if (nargs >= 3) |
239 | { | |
39eaa782 RS |
240 | buffer = args[2]; |
241 | ||
242 | /* If BUFFER is a list, its meaning is | |
243 | (BUFFER-FOR-STDOUT FILE-FOR-STDERR). */ | |
244 | if (CONSP (buffer)) | |
245 | { | |
246 | if (CONSP (XCONS (buffer)->cdr)) | |
d20b8af6 RS |
247 | error_file = Fexpand_file_name (XCONS (XCONS (buffer)->cdr)->car, |
248 | Qnil); | |
39eaa782 RS |
249 | buffer = XCONS (buffer)->car; |
250 | } | |
044512ed | 251 | |
39eaa782 RS |
252 | if (!(EQ (buffer, Qnil) |
253 | || EQ (buffer, Qt) | |
254 | || XFASTINT (buffer) == 0)) | |
e576cab4 | 255 | { |
39eaa782 RS |
256 | Lisp_Object spec_buffer; |
257 | spec_buffer = buffer; | |
258 | buffer = Fget_buffer (buffer); | |
259 | /* Mention the buffer name for a better error message. */ | |
260 | if (NILP (buffer)) | |
261 | CHECK_BUFFER (spec_buffer, 2); | |
e576cab4 JB |
262 | CHECK_BUFFER (buffer, 2); |
263 | } | |
264 | } | |
265 | else | |
266 | buffer = Qnil; | |
80856e74 | 267 | |
58616e67 JB |
268 | /* Make sure that the child will be able to chdir to the current |
269 | buffer's current directory, or its unhandled equivalent. We | |
270 | can't just have the child check for an error when it does the | |
271 | chdir, since it's in a vfork. | |
272 | ||
273 | We have to GCPRO around this because Fexpand_file_name, | |
274 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
275 | might call a file name handling function. The argument list is | |
276 | protected by the caller, so all we really have to worry about is | |
277 | buffer. */ | |
278 | { | |
279 | struct gcpro gcpro1, gcpro2, gcpro3; | |
280 | ||
281 | current_dir = current_buffer->directory; | |
282 | ||
283 | GCPRO3 (infile, buffer, current_dir); | |
284 | ||
c52b0b34 KH |
285 | current_dir |
286 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), | |
287 | Qnil); | |
58616e67 JB |
288 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
289 | report_file_error ("Setting current directory", | |
290 | Fcons (current_buffer->directory, Qnil)); | |
291 | ||
292 | UNGCPRO; | |
293 | } | |
294 | ||
e576cab4 | 295 | display = nargs >= 4 ? args[3] : Qnil; |
80856e74 | 296 | |
e576cab4 | 297 | filefd = open (XSTRING (infile)->data, O_RDONLY, 0); |
80856e74 JB |
298 | if (filefd < 0) |
299 | { | |
e576cab4 | 300 | report_file_error ("Opening process input file", Fcons (infile, Qnil)); |
80856e74 JB |
301 | } |
302 | /* Search for program; barf if not found. */ | |
c52b0b34 KH |
303 | { |
304 | struct gcpro gcpro1; | |
305 | ||
306 | GCPRO1 (current_dir); | |
307 | openp (Vexec_path, args[0], EXEC_SUFFIXES, &path, 1); | |
308 | UNGCPRO; | |
309 | } | |
012c6fcb | 310 | if (NILP (path)) |
80856e74 JB |
311 | { |
312 | close (filefd); | |
313 | report_file_error ("Searching for program", Fcons (args[0], Qnil)); | |
314 | } | |
315 | new_argv[0] = XSTRING (path)->data; | |
c52b0b34 KH |
316 | { |
317 | register int i; | |
318 | for (i = 4; i < nargs; i++) | |
319 | { | |
320 | CHECK_STRING (args[i], i); | |
321 | new_argv[i - 3] = XSTRING (args[i])->data; | |
322 | } | |
323 | new_argv[i - 3] = 0; | |
324 | } | |
80856e74 | 325 | |
7e6c2178 | 326 | #ifdef MSDOS /* MW, July 1993 */ |
7e6c2178 RS |
327 | if ((outf = egetenv ("TMP")) || (outf = egetenv ("TEMP"))) |
328 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); | |
329 | else | |
330 | { | |
331 | tempfile = alloca (20); | |
332 | *tempfile = '\0'; | |
333 | } | |
334 | dostounix_filename (tempfile); | |
335 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') | |
336 | strcat (tempfile, "/"); | |
337 | strcat (tempfile, "detmp.XXX"); | |
338 | mktemp (tempfile); | |
339 | ||
340 | outfilefd = creat (tempfile, S_IREAD | S_IWRITE); | |
341 | if (outfilefd < 0) | |
342 | { | |
343 | close (filefd); | |
344 | report_file_error ("Opening process output file", Fcons (tempfile, Qnil)); | |
345 | } | |
2610078a | 346 | fd[1] = outfilefd; |
7e6c2178 RS |
347 | #endif |
348 | ||
d50d3dc8 | 349 | if (INTEGERP (buffer)) |
5437e9f9 | 350 | fd[1] = open (NULL_DEVICE, O_WRONLY), fd[0] = -1; |
80856e74 JB |
351 | else |
352 | { | |
7e6c2178 | 353 | #ifndef MSDOS |
bad95d8f RS |
354 | #ifdef WINDOWSNT |
355 | pipe_with_inherited_out (fd); | |
356 | #else /* not WINDOWSNT */ | |
80856e74 | 357 | pipe (fd); |
bad95d8f | 358 | #endif /* not WINDOWSNT */ |
7e6c2178 | 359 | #endif |
80856e74 JB |
360 | #if 0 |
361 | /* Replaced by close_process_descs */ | |
362 | set_exclusive_use (fd[0]); | |
363 | #endif | |
364 | } | |
365 | ||
366 | { | |
367 | /* child_setup must clobber environ in systems with true vfork. | |
368 | Protect it from permanent change. */ | |
369 | register char **save_environ = environ; | |
370 | register int fd1 = fd[1]; | |
39eaa782 | 371 | int fd_error = fd1; |
80856e74 JB |
372 | |
373 | #if 0 /* Some systems don't have sigblock. */ | |
e065a56e | 374 | mask = sigblock (sigmask (SIGCHLD)); |
80856e74 JB |
375 | #endif |
376 | ||
377 | /* Record that we're about to create a synchronous process. */ | |
378 | synch_process_alive = 1; | |
379 | ||
5c03767e RS |
380 | /* These vars record information from process termination. |
381 | Clear them now before process can possibly terminate, | |
382 | to avoid timing error if process terminates soon. */ | |
383 | synch_process_death = 0; | |
384 | synch_process_retcode = 0; | |
385 | ||
39eaa782 RS |
386 | if (NILP (error_file)) |
387 | fd_error = open (NULL_DEVICE, O_WRONLY); | |
388 | else if (STRINGP (error_file)) | |
389 | { | |
390 | #ifdef DOS_NT | |
391 | fd_error = open (XSTRING (error_file)->data, | |
392 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, | |
393 | S_IREAD | S_IWRITE); | |
394 | #else /* not DOS_NT */ | |
395 | fd_error = creat (XSTRING (error_file)->data, 0666); | |
396 | #endif /* not DOS_NT */ | |
397 | } | |
398 | ||
399 | if (fd_error < 0) | |
400 | { | |
401 | close (filefd); | |
402 | close (fd[0]); | |
403 | if (fd1 >= 0) | |
404 | close (fd1); | |
405 | report_file_error ("Cannot open", error_file); | |
406 | } | |
2610078a KH |
407 | #ifdef MSDOS /* MW, July 1993 */ |
408 | /* ??? Someone who knows MSDOG needs to check whether this properly | |
409 | closes all descriptors that it opens. | |
410 | ||
411 | Note that run_msdos_command() actually returns the child process | |
412 | exit status, not its PID, so we assign it to `synch_process_retcode' | |
413 | below. */ | |
414 | pid = run_msdos_command (new_argv, current_dir, | |
415 | filefd, outfilefd, fd_error); | |
39eaa782 | 416 | |
2610078a KH |
417 | /* Record that the synchronous process exited and note its |
418 | termination status. */ | |
419 | synch_process_alive = 0; | |
420 | synch_process_retcode = pid; | |
421 | if (synch_process_retcode < 0) /* means it couldn't be exec'ed */ | |
422 | synch_process_death = strerror(errno); | |
423 | ||
424 | close (outfilefd); | |
425 | if (fd_error != outfilefd) | |
426 | close (fd_error); | |
427 | fd1 = -1; /* No harm in closing that one! */ | |
428 | fd[0] = open (tempfile, NILP (Vbinary_process_output) ? O_TEXT : O_BINARY); | |
429 | if (fd[0] < 0) | |
430 | { | |
431 | unlink (tempfile); | |
432 | close (filefd); | |
433 | report_file_error ("Cannot re-open temporary file", Qnil); | |
434 | } | |
435 | #else /* not MSDOS */ | |
bad95d8f | 436 | #ifdef WINDOWSNT |
39eaa782 | 437 | pid = child_setup (filefd, fd1, fd_error, new_argv, 0, current_dir); |
bad95d8f | 438 | #else /* not WINDOWSNT */ |
80856e74 JB |
439 | pid = vfork (); |
440 | ||
441 | if (pid == 0) | |
442 | { | |
443 | if (fd[0] >= 0) | |
444 | close (fd[0]); | |
5a570e37 | 445 | #ifdef USG |
80856e74 JB |
446 | setpgrp (); |
447 | #else | |
448 | setpgrp (pid, pid); | |
449 | #endif /* USG */ | |
39eaa782 | 450 | child_setup (filefd, fd1, fd_error, new_argv, 0, current_dir); |
80856e74 | 451 | } |
bad95d8f | 452 | #endif /* not WINDOWSNT */ |
2610078a | 453 | #endif /* not MSDOS */ |
80856e74 | 454 | |
80856e74 JB |
455 | environ = save_environ; |
456 | ||
6b6e798b RS |
457 | /* Close most of our fd's, but not fd[0] |
458 | since we will use that to read input from. */ | |
80856e74 | 459 | close (filefd); |
7e6c2178 RS |
460 | if (fd1 >= 0) |
461 | close (fd1); | |
80856e74 JB |
462 | } |
463 | ||
464 | if (pid < 0) | |
465 | { | |
6b6e798b RS |
466 | if (fd[0] >= 0) |
467 | close (fd[0]); | |
80856e74 JB |
468 | report_file_error ("Doing vfork", Qnil); |
469 | } | |
470 | ||
d50d3dc8 | 471 | if (INTEGERP (buffer)) |
80856e74 | 472 | { |
6b6e798b RS |
473 | if (fd[0] >= 0) |
474 | close (fd[0]); | |
80856e74 | 475 | #ifndef subprocesses |
e576cab4 JB |
476 | /* If Emacs has been built with asynchronous subprocess support, |
477 | we don't need to do this, I think because it will then have | |
478 | the facilities for handling SIGCHLD. */ | |
80856e74 JB |
479 | wait_without_blocking (); |
480 | #endif /* subprocesses */ | |
80856e74 JB |
481 | return Qnil; |
482 | } | |
483 | ||
6b6e798b | 484 | /* Enable sending signal if user quits below. */ |
37d54121 RS |
485 | call_process_exited = 0; |
486 | ||
7e6c2178 RS |
487 | #ifdef MSDOS |
488 | /* MSDOS needs different cleanup information. */ | |
489 | record_unwind_protect (call_process_cleanup, | |
490 | Fcons (make_number (fd[0]), build_string (tempfile))); | |
491 | #else | |
80856e74 JB |
492 | record_unwind_protect (call_process_cleanup, |
493 | Fcons (make_number (fd[0]), make_number (pid))); | |
7e6c2178 | 494 | #endif /* not MSDOS */ |
80856e74 JB |
495 | |
496 | ||
d50d3dc8 | 497 | if (BUFFERP (buffer)) |
80856e74 JB |
498 | Fset_buffer (buffer); |
499 | ||
500 | immediate_quit = 1; | |
501 | QUIT; | |
502 | ||
503 | { | |
504 | register int nread; | |
0ad477db | 505 | int first = 1; |
6e3bfbb2 | 506 | int total_read = 0; |
80856e74 | 507 | |
60558b19 | 508 | while (1) |
80856e74 | 509 | { |
60558b19 RS |
510 | /* Repeatedly read until we've filled as much as possible |
511 | of the buffer size we have. But don't read | |
8e6208c5 | 512 | less than 1024--save that for the next bufferful. */ |
60558b19 RS |
513 | |
514 | nread = 0; | |
515 | while (nread < bufsize - 1024) | |
00fb3e95 | 516 | { |
60558b19 RS |
517 | int this_read |
518 | = read (fd[0], bufptr + nread, bufsize - nread); | |
519 | ||
520 | if (this_read < 0) | |
521 | goto give_up; | |
522 | ||
523 | if (this_read == 0) | |
524 | goto give_up_1; | |
525 | ||
526 | nread += this_read; | |
00fb3e95 | 527 | } |
60558b19 RS |
528 | |
529 | give_up_1: | |
530 | ||
531 | /* Now NREAD is the total amount of data in the buffer. */ | |
532 | if (nread == 0) | |
533 | break; | |
534 | ||
80856e74 | 535 | immediate_quit = 0; |
6e3bfbb2 RS |
536 | total_read += nread; |
537 | ||
012c6fcb | 538 | if (!NILP (buffer)) |
6e3bfbb2 RS |
539 | insert (bufptr, nread); |
540 | ||
541 | /* Make the buffer bigger as we continue to read more data, | |
542 | but not past 64k. */ | |
543 | if (bufsize < 64 * 1024 && total_read > 32 * bufsize) | |
544 | { | |
545 | bufsize *= 2; | |
546 | bufptr = (char *) alloca (bufsize); | |
547 | } | |
548 | ||
012c6fcb | 549 | if (!NILP (display) && INTERACTIVE) |
0ad477db RS |
550 | { |
551 | if (first) | |
552 | prepare_menu_bars (); | |
553 | first = 0; | |
554 | redisplay_preserve_echo_area (); | |
555 | } | |
80856e74 JB |
556 | immediate_quit = 1; |
557 | QUIT; | |
558 | } | |
60558b19 | 559 | give_up: ; |
80856e74 JB |
560 | } |
561 | ||
562 | /* Wait for it to terminate, unless it already has. */ | |
563 | wait_for_termination (pid); | |
564 | ||
565 | immediate_quit = 0; | |
566 | ||
567 | set_buffer_internal (old); | |
568 | ||
37d54121 RS |
569 | /* Don't kill any children that the subprocess may have left behind |
570 | when exiting. */ | |
571 | call_process_exited = 1; | |
572 | ||
80856e74 JB |
573 | unbind_to (count, Qnil); |
574 | ||
80856e74 JB |
575 | if (synch_process_death) |
576 | return build_string (synch_process_death); | |
577 | return make_number (synch_process_retcode); | |
578 | } | |
579 | #endif | |
580 | \f | |
9fefd2ba | 581 | static Lisp_Object |
80856e74 JB |
582 | delete_temp_file (name) |
583 | Lisp_Object name; | |
584 | { | |
2e3dc201 | 585 | /* Use Fdelete_file (indirectly) because that runs a file name handler. |
59750d69 | 586 | We did that when writing the file, so we should do so when deleting. */ |
2e3dc201 | 587 | internal_delete_file (name); |
80856e74 JB |
588 | } |
589 | ||
590 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
591 | 3, MANY, 0, | |
592 | "Send text from START to END to a synchronous process running PROGRAM.\n\ | |
593 | Delete the text if fourth arg DELETE is non-nil.\n\ | |
39eaa782 | 594 | \n\ |
80856e74 JB |
595 | Insert output in BUFFER before point; t means current buffer;\n\ |
596 | nil for BUFFER means discard it; 0 means discard and don't wait.\n\ | |
39eaa782 RS |
597 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,\n\ |
598 | REAL-BUFFER says what to do with standard output, as above,\n\ | |
599 | while STDERR-FILE says what to do with standard error in the child.\n\ | |
600 | STDERR-FILE may be nil (discard standard error output),\n\ | |
601 | t (mix it with ordinary output), or a file name string.\n\ | |
602 | \n\ | |
80856e74 JB |
603 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.\n\ |
604 | Remaining args are passed to PROGRAM at startup as command args.\n\ | |
39eaa782 RS |
605 | \n\ |
606 | If BUFFER is nil, `call-process-region' returns immediately with value nil.\n\ | |
607 | Otherwise it waits for PROGRAM to terminate\n\ | |
e576cab4 | 608 | and returns a numeric exit status or a signal description string.\n\ |
d177f194 | 609 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.") |
80856e74 JB |
610 | (nargs, args) |
611 | int nargs; | |
612 | register Lisp_Object *args; | |
613 | { | |
39323a7e KH |
614 | struct gcpro gcpro1; |
615 | Lisp_Object filename_string; | |
616 | register Lisp_Object start, end; | |
bad95d8f | 617 | #ifdef DOS_NT |
7e6c2178 RS |
618 | char *tempfile; |
619 | #else | |
80856e74 | 620 | char tempfile[20]; |
7e6c2178 | 621 | #endif |
80856e74 | 622 | int count = specpdl_ptr - specpdl; |
bad95d8f | 623 | #ifdef DOS_NT |
7e6c2178 RS |
624 | char *outf = '\0'; |
625 | ||
626 | if ((outf = egetenv ("TMP")) || (outf = egetenv ("TEMP"))) | |
627 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); | |
628 | else | |
629 | { | |
630 | tempfile = alloca (20); | |
631 | *tempfile = '\0'; | |
632 | } | |
633 | dostounix_filename (tempfile); | |
0774fcf8 | 634 | if (!IS_DIRECTORY_SEP (tempfile[strlen (tempfile) - 1])) |
7e6c2178 | 635 | strcat (tempfile, "/"); |
0774fcf8 RS |
636 | #ifdef WINDOWSNT |
637 | strcat (tempfile, "emXXXXXX"); | |
638 | #else | |
7e6c2178 | 639 | strcat (tempfile, "detmp.XXX"); |
0774fcf8 | 640 | #endif |
bad95d8f | 641 | #else /* not DOS_NT */ |
80856e74 JB |
642 | |
643 | #ifdef VMS | |
644 | strcpy (tempfile, "tmp:emacsXXXXXX."); | |
645 | #else | |
646 | strcpy (tempfile, "/tmp/emacsXXXXXX"); | |
647 | #endif | |
bad95d8f | 648 | #endif /* not DOS_NT */ |
7e6c2178 | 649 | |
80856e74 JB |
650 | mktemp (tempfile); |
651 | ||
652 | filename_string = build_string (tempfile); | |
39323a7e | 653 | GCPRO1 (filename_string); |
80856e74 JB |
654 | start = args[0]; |
655 | end = args[1]; | |
bad95d8f | 656 | #ifdef DOS_NT |
093650fe | 657 | specbind (Qbuffer_file_type, Vbinary_process_input); |
bc4498bb | 658 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil); |
093650fe | 659 | unbind_to (count, Qnil); |
bad95d8f | 660 | #else /* not DOS_NT */ |
bc4498bb | 661 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil); |
bad95d8f | 662 | #endif /* not DOS_NT */ |
093650fe | 663 | |
80856e74 JB |
664 | record_unwind_protect (delete_temp_file, filename_string); |
665 | ||
012c6fcb | 666 | if (!NILP (args[3])) |
80856e74 JB |
667 | Fdelete_region (start, end); |
668 | ||
669 | args[3] = filename_string; | |
80856e74 | 670 | |
39323a7e | 671 | RETURN_UNGCPRO (unbind_to (count, Fcall_process (nargs - 2, args + 2))); |
80856e74 JB |
672 | } |
673 | \f | |
674 | #ifndef VMS /* VMS version is in vmsproc.c. */ | |
675 | ||
676 | /* This is the last thing run in a newly forked inferior | |
677 | either synchronous or asynchronous. | |
678 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
679 | Initialize inferior's priority, pgrp, connected dir and environment. | |
680 | then exec another program based on new_argv. | |
681 | ||
682 | This function may change environ for the superior process. | |
683 | Therefore, the superior process must save and restore the value | |
684 | of environ around the vfork and the call to this function. | |
685 | ||
686 | ENV is the environment for the subprocess. | |
687 | ||
688 | SET_PGRP is nonzero if we should put the subprocess into a separate | |
e576cab4 JB |
689 | process group. |
690 | ||
691 | CURRENT_DIR is an elisp string giving the path of the current | |
692 | directory the subprocess should have. Since we can't really signal | |
693 | a decent error from within the child, this should be verified as an | |
694 | executable directory by the parent. */ | |
80856e74 | 695 | |
e576cab4 | 696 | child_setup (in, out, err, new_argv, set_pgrp, current_dir) |
80856e74 JB |
697 | int in, out, err; |
698 | register char **new_argv; | |
80856e74 | 699 | int set_pgrp; |
e576cab4 | 700 | Lisp_Object current_dir; |
80856e74 | 701 | { |
7e6c2178 RS |
702 | #ifdef MSDOS |
703 | /* The MSDOS port of gcc cannot fork, vfork, ... so we must call system | |
704 | instead. */ | |
705 | #else /* not MSDOS */ | |
e576cab4 | 706 | char **env; |
7fcf7f05 | 707 | char *pwd_var; |
bad95d8f RS |
708 | #ifdef WINDOWSNT |
709 | int cpid; | |
710 | HANDLE handles[4]; | |
711 | #endif /* WINDOWSNT */ | |
e576cab4 | 712 | |
33abe2d9 | 713 | int pid = getpid (); |
80856e74 | 714 | |
68d10241 | 715 | #ifdef SET_EMACS_PRIORITY |
4f0b9d49 JB |
716 | { |
717 | extern int emacs_priority; | |
718 | ||
68d10241 RS |
719 | if (emacs_priority < 0) |
720 | nice (- emacs_priority); | |
4f0b9d49 | 721 | } |
5b633aeb | 722 | #endif |
80856e74 JB |
723 | |
724 | #ifdef subprocesses | |
725 | /* Close Emacs's descriptors that this process should not have. */ | |
726 | close_process_descs (); | |
727 | #endif | |
4458cebe | 728 | close_load_descs (); |
80856e74 JB |
729 | |
730 | /* Note that use of alloca is always safe here. It's obvious for systems | |
731 | that do not have true vfork or that have true (stack) alloca. | |
732 | If using vfork and C_ALLOCA it is safe because that changes | |
733 | the superior's static variables as if the superior had done alloca | |
734 | and will be cleaned up in the usual way. */ | |
e576cab4 | 735 | { |
7fcf7f05 | 736 | register char *temp; |
e576cab4 | 737 | register int i; |
77d78be1 | 738 | |
e576cab4 | 739 | i = XSTRING (current_dir)->size; |
7fcf7f05 RS |
740 | pwd_var = (char *) alloca (i + 6); |
741 | temp = pwd_var + 4; | |
742 | bcopy ("PWD=", pwd_var, 4); | |
e576cab4 | 743 | bcopy (XSTRING (current_dir)->data, temp, i); |
bad95d8f | 744 | if (!IS_DIRECTORY_SEP (temp[i - 1])) temp[i++] = DIRECTORY_SEP; |
e576cab4 JB |
745 | temp[i] = 0; |
746 | ||
747 | /* We can't signal an Elisp error here; we're in a vfork. Since | |
748 | the callers check the current directory before forking, this | |
749 | should only return an error if the directory's permissions | |
750 | are changed between the check and this chdir, but we should | |
751 | at least check. */ | |
752 | if (chdir (temp) < 0) | |
20b25e46 | 753 | _exit (errno); |
7fcf7f05 RS |
754 | |
755 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ | |
bad95d8f | 756 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 757 | temp[--i] = 0; |
e576cab4 | 758 | } |
80856e74 | 759 | |
80856e74 JB |
760 | /* Set `env' to a vector of the strings in Vprocess_environment. */ |
761 | { | |
762 | register Lisp_Object tem; | |
763 | register char **new_env; | |
764 | register int new_length; | |
765 | ||
766 | new_length = 0; | |
767 | for (tem = Vprocess_environment; | |
d50d3dc8 | 768 | CONSP (tem) && STRINGP (XCONS (tem)->car); |
80856e74 JB |
769 | tem = XCONS (tem)->cdr) |
770 | new_length++; | |
771 | ||
7fcf7f05 RS |
772 | /* new_length + 2 to include PWD and terminating 0. */ |
773 | env = new_env = (char **) alloca ((new_length + 2) * sizeof (char *)); | |
774 | ||
775 | /* If we have a PWD envvar, pass one down, | |
776 | but with corrected value. */ | |
777 | if (getenv ("PWD")) | |
778 | *new_env++ = pwd_var; | |
80856e74 | 779 | |
cd9565ba | 780 | /* Copy the Vprocess_environment strings into new_env. */ |
80856e74 | 781 | for (tem = Vprocess_environment; |
d50d3dc8 | 782 | CONSP (tem) && STRINGP (XCONS (tem)->car); |
80856e74 | 783 | tem = XCONS (tem)->cdr) |
cd9565ba RS |
784 | { |
785 | char **ep = env; | |
786 | char *string = (char *) XSTRING (XCONS (tem)->car)->data; | |
787 | /* See if this string duplicates any string already in the env. | |
788 | If so, don't put it in. | |
789 | When an env var has multiple definitions, | |
790 | we keep the definition that comes first in process-environment. */ | |
791 | for (; ep != new_env; ep++) | |
792 | { | |
793 | char *p = *ep, *q = string; | |
794 | while (1) | |
795 | { | |
796 | if (*q == 0) | |
797 | /* The string is malformed; might as well drop it. */ | |
798 | goto duplicate; | |
799 | if (*q != *p) | |
800 | break; | |
801 | if (*q == '=') | |
802 | goto duplicate; | |
803 | p++, q++; | |
804 | } | |
805 | } | |
806 | *new_env++ = string; | |
807 | duplicate: ; | |
808 | } | |
80856e74 JB |
809 | *new_env = 0; |
810 | } | |
bad95d8f RS |
811 | #ifdef WINDOWSNT |
812 | prepare_standard_handles (in, out, err, handles); | |
813 | #else /* not WINDOWSNT */ | |
426b37ae JB |
814 | /* Make sure that in, out, and err are not actually already in |
815 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 816 | started with its standard in, out, or error closed, as might |
426b37ae | 817 | happen under X. */ |
f29f9e4a RS |
818 | { |
819 | int oin = in, oout = out; | |
820 | ||
821 | /* We have to avoid relocating the same descriptor twice! */ | |
822 | ||
823 | in = relocate_fd (in, 3); | |
824 | ||
825 | if (out == oin) | |
826 | out = in; | |
827 | else | |
3e9367e7 | 828 | out = relocate_fd (out, 3); |
f29f9e4a RS |
829 | |
830 | if (err == oin) | |
831 | err = in; | |
832 | else if (err == oout) | |
833 | err = out; | |
834 | else | |
3e9367e7 | 835 | err = relocate_fd (err, 3); |
f29f9e4a | 836 | } |
426b37ae | 837 | |
80856e74 JB |
838 | close (0); |
839 | close (1); | |
840 | close (2); | |
841 | ||
842 | dup2 (in, 0); | |
843 | dup2 (out, 1); | |
844 | dup2 (err, 2); | |
845 | close (in); | |
846 | close (out); | |
847 | close (err); | |
bad95d8f | 848 | #endif /* not WINDOWSNT */ |
80856e74 | 849 | |
fdba8590 RS |
850 | #ifdef USG |
851 | #ifndef SETPGRP_RELEASES_CTTY | |
e576cab4 | 852 | setpgrp (); /* No arguments but equivalent in this case */ |
fdba8590 | 853 | #endif |
e576cab4 JB |
854 | #else |
855 | setpgrp (pid, pid); | |
856 | #endif /* USG */ | |
a129418f RS |
857 | /* setpgrp_of_tty is incorrect here; it uses input_fd. */ |
858 | EMACS_SET_TTY_PGRP (0, &pid); | |
80856e74 JB |
859 | |
860 | #ifdef vipc | |
861 | something missing here; | |
862 | #endif /* vipc */ | |
863 | ||
bad95d8f RS |
864 | #ifdef WINDOWSNT |
865 | /* Spawn the child. (See ntproc.c:Spawnve). */ | |
866 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); | |
ff27bfbe KH |
867 | if (cpid == -1) |
868 | /* An error occurred while trying to spawn the process. */ | |
869 | report_file_error ("Spawning child process", Qnil); | |
bad95d8f RS |
870 | reset_standard_handles (in, out, err, handles); |
871 | return cpid; | |
872 | #else /* not WINDOWSNT */ | |
80856e74 JB |
873 | /* execvp does not accept an environment arg so the only way |
874 | to pass this environment is to set environ. Our caller | |
875 | is responsible for restoring the ambient value of environ. */ | |
876 | environ = env; | |
877 | execvp (new_argv[0], new_argv); | |
878 | ||
d20b8af6 | 879 | write (1, "Can't exec program: ", 26); |
80856e74 | 880 | write (1, new_argv[0], strlen (new_argv[0])); |
d20b8af6 | 881 | write (1, "\n", 1); |
80856e74 | 882 | _exit (1); |
bad95d8f | 883 | #endif /* not WINDOWSNT */ |
7e6c2178 | 884 | #endif /* not MSDOS */ |
80856e74 JB |
885 | } |
886 | ||
426b37ae JB |
887 | /* Move the file descriptor FD so that its number is not less than MIN. |
888 | If the file descriptor is moved at all, the original is freed. */ | |
889 | int | |
890 | relocate_fd (fd, min) | |
891 | int fd, min; | |
892 | { | |
893 | if (fd >= min) | |
894 | return fd; | |
895 | else | |
896 | { | |
897 | int new = dup (fd); | |
898 | if (new == -1) | |
899 | { | |
20c018a0 | 900 | char *message1 = "Error while setting up child: "; |
826c56ac | 901 | char *errmessage = strerror (errno); |
20c018a0 JB |
902 | char *message2 = "\n"; |
903 | write (2, message1, strlen (message1)); | |
826c56ac | 904 | write (2, errmessage, strlen (errmessage)); |
20c018a0 | 905 | write (2, message2, strlen (message2)); |
426b37ae JB |
906 | _exit (1); |
907 | } | |
908 | /* Note that we hold the original FD open while we recurse, | |
909 | to guarantee we'll get a new FD if we need it. */ | |
910 | new = relocate_fd (new, min); | |
911 | close (fd); | |
912 | return new; | |
913 | } | |
914 | } | |
915 | ||
012c6fcb JA |
916 | static int |
917 | getenv_internal (var, varlen, value, valuelen) | |
918 | char *var; | |
919 | int varlen; | |
920 | char **value; | |
921 | int *valuelen; | |
922 | { | |
923 | Lisp_Object scan; | |
924 | ||
925 | for (scan = Vprocess_environment; CONSP (scan); scan = XCONS (scan)->cdr) | |
926 | { | |
c1350752 KH |
927 | Lisp_Object entry; |
928 | ||
929 | entry = XCONS (scan)->car; | |
d50d3dc8 | 930 | if (STRINGP (entry) |
012c6fcb JA |
931 | && XSTRING (entry)->size > varlen |
932 | && XSTRING (entry)->data[varlen] == '=' | |
bad95d8f RS |
933 | #ifdef WINDOWSNT |
934 | /* NT environment variables are case insensitive. */ | |
a9971c6d | 935 | && ! strnicmp (XSTRING (entry)->data, var, varlen) |
bad95d8f | 936 | #else /* not WINDOWSNT */ |
a9971c6d | 937 | && ! bcmp (XSTRING (entry)->data, var, varlen) |
bad95d8f | 938 | #endif /* not WINDOWSNT */ |
a9971c6d | 939 | ) |
012c6fcb JA |
940 | { |
941 | *value = (char *) XSTRING (entry)->data + (varlen + 1); | |
942 | *valuelen = XSTRING (entry)->size - (varlen + 1); | |
943 | return 1; | |
944 | } | |
945 | } | |
946 | ||
947 | return 0; | |
948 | } | |
949 | ||
0ad477db | 950 | DEFUN ("getenv", Fgetenv, Sgetenv, 1, 1, 0, |
012c6fcb JA |
951 | "Return the value of environment variable VAR, as a string.\n\ |
952 | VAR should be a string. Value is nil if VAR is undefined in the environment.\n\ | |
953 | This function consults the variable ``process-environment'' for its value.") | |
954 | (var) | |
955 | Lisp_Object var; | |
956 | { | |
957 | char *value; | |
958 | int valuelen; | |
959 | ||
960 | CHECK_STRING (var, 0); | |
961 | if (getenv_internal (XSTRING (var)->data, XSTRING (var)->size, | |
962 | &value, &valuelen)) | |
963 | return make_string (value, valuelen); | |
964 | else | |
965 | return Qnil; | |
966 | } | |
967 | ||
968 | /* A version of getenv that consults process_environment, easily | |
e576cab4 | 969 | callable from C. */ |
012c6fcb JA |
970 | char * |
971 | egetenv (var) | |
e576cab4 | 972 | char *var; |
012c6fcb JA |
973 | { |
974 | char *value; | |
975 | int valuelen; | |
976 | ||
977 | if (getenv_internal (var, strlen (var), &value, &valuelen)) | |
978 | return value; | |
979 | else | |
980 | return 0; | |
981 | } | |
982 | ||
80856e74 JB |
983 | #endif /* not VMS */ |
984 | \f | |
8de15d69 | 985 | /* This is run before init_cmdargs. */ |
7e6c2178 | 986 | |
8de15d69 RS |
987 | init_callproc_1 () |
988 | { | |
989 | char *data_dir = egetenv ("EMACSDATA"); | |
35a2f4b8 KH |
990 | char *doc_dir = egetenv ("EMACSDOC"); |
991 | ||
8de15d69 | 992 | Vdata_directory |
7e6c2178 | 993 | = Ffile_name_as_directory (build_string (data_dir ? data_dir |
8de15d69 | 994 | : PATH_DATA)); |
35a2f4b8 KH |
995 | Vdoc_directory |
996 | = Ffile_name_as_directory (build_string (doc_dir ? doc_dir | |
997 | : PATH_DOC)); | |
9453ea7b | 998 | |
e576cab4 JB |
999 | /* Check the EMACSPATH environment variable, defaulting to the |
1000 | PATH_EXEC path from paths.h. */ | |
1001 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); | |
80856e74 JB |
1002 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
1003 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
8de15d69 RS |
1004 | } |
1005 | ||
e17f7533 | 1006 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 RS |
1007 | |
1008 | init_callproc () | |
1009 | { | |
1010 | char *data_dir = egetenv ("EMACSDATA"); | |
1011 | ||
1012 | register char * sh; | |
1013 | Lisp_Object tempdir; | |
1014 | ||
05630743 | 1015 | if (initialized && !NILP (Vinstallation_directory)) |
8de15d69 | 1016 | { |
05630743 RS |
1017 | /* Add to the path the lib-src subdir of the installation dir. */ |
1018 | Lisp_Object tem; | |
1019 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1020 | Vinstallation_directory); | |
1021 | if (NILP (Fmember (tem, Vexec_path))) | |
8de15d69 | 1022 | { |
bad95d8f | 1023 | #ifndef DOS_NT |
1a6640ec | 1024 | /* MSDOS uses wrapped binaries, so don't do this. */ |
8de15d69 RS |
1025 | Vexec_path = nconc2 (Vexec_path, Fcons (tem, Qnil)); |
1026 | Vexec_directory = Ffile_name_as_directory (tem); | |
bad95d8f | 1027 | #endif /* not DOS_NT */ |
e17f7533 | 1028 | } |
8de15d69 | 1029 | |
e17f7533 RS |
1030 | /* Maybe use ../etc as well as ../lib-src. */ |
1031 | if (data_dir == 0) | |
1032 | { | |
1033 | tem = Fexpand_file_name (build_string ("etc"), | |
1034 | Vinstallation_directory); | |
1035 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1036 | } |
1037 | } | |
7e933683 RS |
1038 | |
1039 | /* Look for the files that should be in etc. We don't use | |
1040 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1041 | near the executable, and they are never in the build |
7e933683 RS |
1042 | directory when that's different from the source directory. |
1043 | ||
1044 | Instead, if these files are not in the nominal place, we try the | |
1045 | source directory. */ | |
1046 | if (data_dir == 0) | |
1047 | { | |
1048 | Lisp_Object tem, tem1, newdir; | |
1049 | ||
1050 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); | |
1051 | tem1 = Ffile_exists_p (tem); | |
1052 | if (NILP (tem1)) | |
1053 | { | |
1054 | newdir = Fexpand_file_name (build_string ("../etc/"), | |
1055 | build_string (PATH_DUMPLOADSEARCH)); | |
1056 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1057 | tem1 = Ffile_exists_p (tem); | |
1058 | if (!NILP (tem1)) | |
1059 | Vdata_directory = newdir; | |
1060 | } | |
1061 | } | |
80856e74 | 1062 | |
e576cab4 JB |
1063 | tempdir = Fdirectory_file_name (Vexec_directory); |
1064 | if (access (XSTRING (tempdir)->data, 0) < 0) | |
80856e74 | 1065 | { |
0af6a831 RS |
1066 | fprintf (stderr, |
1067 | "Warning: arch-dependent data dir (%s) does not exist.\n", | |
1068 | XSTRING (Vexec_directory)->data); | |
80856e74 JB |
1069 | sleep (2); |
1070 | } | |
1071 | ||
e576cab4 JB |
1072 | tempdir = Fdirectory_file_name (Vdata_directory); |
1073 | if (access (XSTRING (tempdir)->data, 0) < 0) | |
1074 | { | |
0af6a831 RS |
1075 | fprintf (stderr, |
1076 | "Warning: arch-independent data dir (%s) does not exist.\n", | |
1077 | XSTRING (Vdata_directory)->data); | |
e576cab4 JB |
1078 | sleep (2); |
1079 | } | |
1080 | ||
80856e74 JB |
1081 | #ifdef VMS |
1082 | Vshell_file_name = build_string ("*dcl*"); | |
1083 | #else | |
e576cab4 | 1084 | sh = (char *) getenv ("SHELL"); |
80856e74 JB |
1085 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
1086 | #endif | |
9fefd2ba JB |
1087 | } |
1088 | ||
1089 | set_process_environment () | |
1090 | { | |
1091 | register char **envp; | |
80856e74 | 1092 | |
80856e74 JB |
1093 | Vprocess_environment = Qnil; |
1094 | #ifndef CANNOT_DUMP | |
1095 | if (initialized) | |
1096 | #endif | |
1097 | for (envp = environ; *envp; envp++) | |
1098 | Vprocess_environment = Fcons (build_string (*envp), | |
1099 | Vprocess_environment); | |
80856e74 JB |
1100 | } |
1101 | ||
1102 | syms_of_callproc () | |
1103 | { | |
bad95d8f | 1104 | #ifdef DOS_NT |
093650fe RS |
1105 | Qbuffer_file_type = intern ("buffer-file-type"); |
1106 | staticpro (&Qbuffer_file_type); | |
1107 | ||
1108 | DEFVAR_LISP ("binary-process-input", &Vbinary_process_input, | |
1109 | "*If non-nil then new subprocesses are assumed to take binary input."); | |
1110 | Vbinary_process_input = Qnil; | |
1111 | ||
1112 | DEFVAR_LISP ("binary-process-output", &Vbinary_process_output, | |
7e6c2178 | 1113 | "*If non-nil then new subprocesses are assumed to produce binary output."); |
093650fe | 1114 | Vbinary_process_output = Qnil; |
bad95d8f | 1115 | #endif /* DOS_NT */ |
7e6c2178 | 1116 | |
80856e74 JB |
1117 | DEFVAR_LISP ("shell-file-name", &Vshell_file_name, |
1118 | "*File name to load inferior shells from.\n\ | |
1119 | Initialized from the SHELL environment variable."); | |
1120 | ||
1121 | DEFVAR_LISP ("exec-path", &Vexec_path, | |
1122 | "*List of directories to search programs to run in subprocesses.\n\ | |
1123 | Each element is a string (directory name) or nil (try default directory)."); | |
1124 | ||
1125 | DEFVAR_LISP ("exec-directory", &Vexec_directory, | |
e576cab4 JB |
1126 | "Directory of architecture-dependent files that come with GNU Emacs,\n\ |
1127 | especially executable programs intended for Emacs to invoke."); | |
1128 | ||
1129 | DEFVAR_LISP ("data-directory", &Vdata_directory, | |
1130 | "Directory of architecture-independent files that come with GNU Emacs,\n\ | |
1131 | intended for Emacs to use."); | |
80856e74 | 1132 | |
35a2f4b8 KH |
1133 | DEFVAR_LISP ("doc-directory", &Vdoc_directory, |
1134 | "Directory containing the DOC file that comes with GNU Emacs.\n\ | |
1135 | This is usually the same as data-directory."); | |
1136 | ||
ed61592a JB |
1137 | DEFVAR_LISP ("configure-info-directory", &Vconfigure_info_directory, |
1138 | "For internal use by the build procedure only.\n\ | |
1139 | This is the name of the directory in which the build procedure installed\n\ | |
1140 | Emacs's info files; the default value for Info-default-directory-list\n\ | |
1141 | includes this."); | |
1142 | Vconfigure_info_directory = build_string (PATH_INFO); | |
1143 | ||
80856e74 | 1144 | DEFVAR_LISP ("process-environment", &Vprocess_environment, |
e576cab4 JB |
1145 | "List of environment variables for subprocesses to inherit.\n\ |
1146 | Each element should be a string of the form ENVVARNAME=VALUE.\n\ | |
1147 | The environment which Emacs inherits is placed in this variable\n\ | |
1148 | when Emacs starts."); | |
80856e74 JB |
1149 | |
1150 | #ifndef VMS | |
1151 | defsubr (&Scall_process); | |
012c6fcb | 1152 | defsubr (&Sgetenv); |
986ffb24 | 1153 | #endif |
e576cab4 | 1154 | defsubr (&Scall_process_region); |
80856e74 | 1155 | } |