Commit | Line | Data |
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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 | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
80856e74 JB |
20 | |
21 | ||
22 | #include <signal.h> | |
e576cab4 | 23 | #include <errno.h> |
80856e74 | 24 | |
18160b98 | 25 | #include <config.h> |
565620a5 | 26 | #include <stdio.h> |
80856e74 | 27 | |
426b37ae | 28 | extern int errno; |
826c56ac | 29 | extern char *strerror (); |
426b37ae | 30 | |
80856e74 JB |
31 | /* Define SIGCHLD as an alias for SIGCLD. */ |
32 | ||
33 | #if !defined (SIGCHLD) && defined (SIGCLD) | |
34 | #define SIGCHLD SIGCLD | |
35 | #endif /* SIGCLD */ | |
36 | ||
37 | #include <sys/types.h> | |
88a64fef | 38 | |
80856e74 JB |
39 | #include <sys/file.h> |
40 | #ifdef USG5 | |
472e83fe | 41 | #define INCLUDED_FCNTL |
80856e74 JB |
42 | #include <fcntl.h> |
43 | #endif | |
44 | ||
bad95d8f RS |
45 | #ifdef WINDOWSNT |
46 | #define NOMINMAX | |
47 | #include <windows.h> | |
48 | #include <stdlib.h> /* for proper declaration of environ */ | |
49 | #include <fcntl.h> | |
489f9371 | 50 | #include "w32.h" |
bad95d8f RS |
51 | #define _P_NOWAIT 1 /* from process.h */ |
52 | #endif | |
53 | ||
7e6c2178 | 54 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
00353d4f | 55 | #include "msdos.h" |
472e83fe | 56 | #define INCLUDED_FCNTL |
7e6c2178 RS |
57 | #include <fcntl.h> |
58 | #include <sys/stat.h> | |
59 | #include <sys/param.h> | |
60 | #include <errno.h> | |
61 | #endif /* MSDOS */ | |
62 | ||
80856e74 JB |
63 | #ifndef O_RDONLY |
64 | #define O_RDONLY 0 | |
65 | #endif | |
66 | ||
67 | #ifndef O_WRONLY | |
68 | #define O_WRONLY 1 | |
69 | #endif | |
70 | ||
71 | #include "lisp.h" | |
72 | #include "commands.h" | |
73 | #include "buffer.h" | |
2a6b3537 | 74 | #include <paths.h> |
80856e74 | 75 | #include "process.h" |
d177f194 | 76 | #include "syssignal.h" |
a129418f | 77 | #include "systty.h" |
80856e74 JB |
78 | |
79 | #ifdef VMS | |
80 | extern noshare char **environ; | |
81 | #else | |
82 | extern char **environ; | |
83 | #endif | |
84 | ||
85 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
86 | ||
bad95d8f | 87 | #ifdef DOS_NT |
093650fe RS |
88 | /* When we are starting external processes we need to know whether they |
89 | take binary input (no conversion) or text input (\n is converted to | |
90 | \r\n). Similar for output: if newlines are written as \r\n then it's | |
91 | text process output, otherwise it's binary. */ | |
92 | Lisp_Object Vbinary_process_input; | |
93 | Lisp_Object Vbinary_process_output; | |
bad95d8f | 94 | #endif /* DOS_NT */ |
7e6c2178 | 95 | |
35a2f4b8 | 96 | Lisp_Object Vexec_path, Vexec_directory, Vdata_directory, Vdoc_directory; |
ed61592a | 97 | Lisp_Object Vconfigure_info_directory; |
80856e74 JB |
98 | |
99 | Lisp_Object Vshell_file_name; | |
100 | ||
80856e74 | 101 | Lisp_Object Vprocess_environment; |
80856e74 | 102 | |
bad95d8f | 103 | #ifdef DOS_NT |
093650fe | 104 | Lisp_Object Qbuffer_file_type; |
bad95d8f | 105 | #endif /* DOS_NT */ |
093650fe | 106 | |
80856e74 JB |
107 | /* True iff we are about to fork off a synchronous process or if we |
108 | are waiting for it. */ | |
109 | int synch_process_alive; | |
110 | ||
111 | /* Nonzero => this is a string explaining death of synchronous subprocess. */ | |
112 | char *synch_process_death; | |
113 | ||
114 | /* If synch_process_death is zero, | |
115 | this is exit code of synchronous subprocess. */ | |
116 | int synch_process_retcode; | |
8de15d69 RS |
117 | |
118 | extern Lisp_Object Vdoc_file_name; | |
80856e74 | 119 | \f |
37d54121 RS |
120 | /* Clean up when exiting Fcall_process. |
121 | On MSDOS, delete the temporary file on any kind of termination. | |
122 | On Unix, kill the process and any children on termination by signal. */ | |
123 | ||
124 | /* Nonzero if this is termination due to exit. */ | |
125 | static int call_process_exited; | |
126 | ||
80856e74 JB |
127 | #ifndef VMS /* VMS version is in vmsproc.c. */ |
128 | ||
d177f194 JB |
129 | static Lisp_Object |
130 | call_process_kill (fdpid) | |
131 | Lisp_Object fdpid; | |
132 | { | |
133 | close (XFASTINT (Fcar (fdpid))); | |
134 | EMACS_KILLPG (XFASTINT (Fcdr (fdpid)), SIGKILL); | |
135 | synch_process_alive = 0; | |
136 | return Qnil; | |
137 | } | |
138 | ||
80856e74 JB |
139 | Lisp_Object |
140 | call_process_cleanup (fdpid) | |
141 | Lisp_Object fdpid; | |
142 | { | |
7e6c2178 RS |
143 | #ifdef MSDOS |
144 | /* for MSDOS fdpid is really (fd . tempfile) */ | |
c1350752 KH |
145 | register Lisp_Object file; |
146 | file = Fcdr (fdpid); | |
7e6c2178 RS |
147 | close (XFASTINT (Fcar (fdpid))); |
148 | if (strcmp (XSTRING (file)-> data, NULL_DEVICE) != 0) | |
149 | unlink (XSTRING (file)->data); | |
150 | #else /* not MSDOS */ | |
d177f194 JB |
151 | register int pid = XFASTINT (Fcdr (fdpid)); |
152 | ||
6b6e798b | 153 | |
37d54121 | 154 | if (call_process_exited) |
6b6e798b RS |
155 | { |
156 | close (XFASTINT (Fcar (fdpid))); | |
157 | return Qnil; | |
158 | } | |
37d54121 | 159 | |
d177f194 JB |
160 | if (EMACS_KILLPG (pid, SIGINT) == 0) |
161 | { | |
162 | int count = specpdl_ptr - specpdl; | |
163 | record_unwind_protect (call_process_kill, fdpid); | |
164 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); | |
165 | immediate_quit = 1; | |
166 | QUIT; | |
167 | wait_for_termination (pid); | |
168 | immediate_quit = 0; | |
169 | specpdl_ptr = specpdl + count; /* Discard the unwind protect. */ | |
170 | message1 ("Waiting for process to die...done"); | |
171 | } | |
80856e74 | 172 | synch_process_alive = 0; |
d177f194 | 173 | close (XFASTINT (Fcar (fdpid))); |
7e6c2178 | 174 | #endif /* not MSDOS */ |
80856e74 JB |
175 | return Qnil; |
176 | } | |
177 | ||
178 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, | |
179 | "Call PROGRAM synchronously in separate process.\n\ | |
180 | The program's input comes from file INFILE (nil means `/dev/null').\n\ | |
181 | Insert output in BUFFER before point; t means current buffer;\n\ | |
182 | nil for BUFFER means discard it; 0 means discard and don't wait.\n\ | |
39eaa782 RS |
183 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,\n\ |
184 | REAL-BUFFER says what to do with standard output, as above,\n\ | |
185 | while STDERR-FILE says what to do with standard error in the child.\n\ | |
186 | STDERR-FILE may be nil (discard standard error output),\n\ | |
187 | t (mix it with ordinary output), or a file name string.\n\ | |
188 | \n\ | |
80856e74 JB |
189 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.\n\ |
190 | Remaining arguments are strings passed as command arguments to PROGRAM.\n\ | |
39eaa782 RS |
191 | \n\ |
192 | If BUFFER is 0, `call-process' returns immediately with value nil.\n\ | |
193 | Otherwise it waits for PROGRAM to terminate\n\ | |
e576cab4 | 194 | and returns a numeric exit status or a signal description string.\n\ |
d177f194 | 195 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.") |
80856e74 JB |
196 | (nargs, args) |
197 | int nargs; | |
198 | register Lisp_Object *args; | |
199 | { | |
58616e67 | 200 | Lisp_Object infile, buffer, current_dir, display, path; |
80856e74 JB |
201 | int fd[2]; |
202 | int filefd; | |
203 | register int pid; | |
6e3bfbb2 RS |
204 | char buf[16384]; |
205 | char *bufptr = buf; | |
206 | int bufsize = 16384; | |
80856e74 JB |
207 | int count = specpdl_ptr - specpdl; |
208 | register unsigned char **new_argv | |
209 | = (unsigned char **) alloca ((max (2, nargs - 2)) * sizeof (char *)); | |
210 | struct buffer *old = current_buffer; | |
39eaa782 RS |
211 | /* File to use for stderr in the child. |
212 | t means use same as standard output. */ | |
213 | Lisp_Object error_file; | |
7e6c2178 RS |
214 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
215 | char *outf, *tempfile; | |
216 | int outfilefd; | |
217 | #endif | |
80856e74 JB |
218 | #if 0 |
219 | int mask; | |
220 | #endif | |
80856e74 JB |
221 | CHECK_STRING (args[0], 0); |
222 | ||
39eaa782 RS |
223 | error_file = Qt; |
224 | ||
7e6c2178 RS |
225 | #ifndef subprocesses |
226 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
d50d3dc8 | 227 | if (nargs >= 3 && INTEGERP (args[2])) |
7e6c2178 RS |
228 | error ("Operating system cannot handle asynchronous subprocesses"); |
229 | #endif /* subprocesses */ | |
230 | ||
e576cab4 JB |
231 | if (nargs >= 2 && ! NILP (args[1])) |
232 | { | |
233 | infile = Fexpand_file_name (args[1], current_buffer->directory); | |
234 | CHECK_STRING (infile, 1); | |
235 | } | |
80856e74 | 236 | else |
5437e9f9 | 237 | infile = build_string (NULL_DEVICE); |
80856e74 | 238 | |
e576cab4 JB |
239 | if (nargs >= 3) |
240 | { | |
39eaa782 RS |
241 | buffer = args[2]; |
242 | ||
243 | /* If BUFFER is a list, its meaning is | |
244 | (BUFFER-FOR-STDOUT FILE-FOR-STDERR). */ | |
245 | if (CONSP (buffer)) | |
246 | { | |
247 | if (CONSP (XCONS (buffer)->cdr)) | |
45be8a1e | 248 | { |
a9d4f28a | 249 | Lisp_Object stderr_file; |
45be8a1e RS |
250 | stderr_file = XCONS (XCONS (buffer)->cdr)->car; |
251 | ||
252 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
253 | error_file = stderr_file; | |
254 | else | |
255 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
256 | } | |
257 | ||
39eaa782 RS |
258 | buffer = XCONS (buffer)->car; |
259 | } | |
044512ed | 260 | |
39eaa782 RS |
261 | if (!(EQ (buffer, Qnil) |
262 | || EQ (buffer, Qt) | |
263 | || XFASTINT (buffer) == 0)) | |
e576cab4 | 264 | { |
39eaa782 RS |
265 | Lisp_Object spec_buffer; |
266 | spec_buffer = buffer; | |
267 | buffer = Fget_buffer (buffer); | |
268 | /* Mention the buffer name for a better error message. */ | |
269 | if (NILP (buffer)) | |
270 | CHECK_BUFFER (spec_buffer, 2); | |
e576cab4 JB |
271 | CHECK_BUFFER (buffer, 2); |
272 | } | |
273 | } | |
274 | else | |
275 | buffer = Qnil; | |
80856e74 | 276 | |
58616e67 JB |
277 | /* Make sure that the child will be able to chdir to the current |
278 | buffer's current directory, or its unhandled equivalent. We | |
279 | can't just have the child check for an error when it does the | |
280 | chdir, since it's in a vfork. | |
281 | ||
282 | We have to GCPRO around this because Fexpand_file_name, | |
283 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
284 | might call a file name handling function. The argument list is | |
285 | protected by the caller, so all we really have to worry about is | |
286 | buffer. */ | |
287 | { | |
288 | struct gcpro gcpro1, gcpro2, gcpro3; | |
289 | ||
290 | current_dir = current_buffer->directory; | |
291 | ||
292 | GCPRO3 (infile, buffer, current_dir); | |
293 | ||
c52b0b34 KH |
294 | current_dir |
295 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), | |
296 | Qnil); | |
58616e67 JB |
297 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
298 | report_file_error ("Setting current directory", | |
299 | Fcons (current_buffer->directory, Qnil)); | |
300 | ||
301 | UNGCPRO; | |
302 | } | |
303 | ||
e576cab4 | 304 | display = nargs >= 4 ? args[3] : Qnil; |
80856e74 | 305 | |
e576cab4 | 306 | filefd = open (XSTRING (infile)->data, O_RDONLY, 0); |
80856e74 JB |
307 | if (filefd < 0) |
308 | { | |
e576cab4 | 309 | report_file_error ("Opening process input file", Fcons (infile, Qnil)); |
80856e74 JB |
310 | } |
311 | /* Search for program; barf if not found. */ | |
c52b0b34 KH |
312 | { |
313 | struct gcpro gcpro1; | |
314 | ||
315 | GCPRO1 (current_dir); | |
316 | openp (Vexec_path, args[0], EXEC_SUFFIXES, &path, 1); | |
317 | UNGCPRO; | |
318 | } | |
012c6fcb | 319 | if (NILP (path)) |
80856e74 JB |
320 | { |
321 | close (filefd); | |
322 | report_file_error ("Searching for program", Fcons (args[0], Qnil)); | |
323 | } | |
324 | new_argv[0] = XSTRING (path)->data; | |
c52b0b34 KH |
325 | { |
326 | register int i; | |
327 | for (i = 4; i < nargs; i++) | |
328 | { | |
329 | CHECK_STRING (args[i], i); | |
330 | new_argv[i - 3] = XSTRING (args[i])->data; | |
331 | } | |
332 | new_argv[i - 3] = 0; | |
333 | } | |
80856e74 | 334 | |
7e6c2178 | 335 | #ifdef MSDOS /* MW, July 1993 */ |
7e6c2178 RS |
336 | if ((outf = egetenv ("TMP")) || (outf = egetenv ("TEMP"))) |
337 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); | |
338 | else | |
339 | { | |
340 | tempfile = alloca (20); | |
341 | *tempfile = '\0'; | |
342 | } | |
343 | dostounix_filename (tempfile); | |
344 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') | |
345 | strcat (tempfile, "/"); | |
346 | strcat (tempfile, "detmp.XXX"); | |
347 | mktemp (tempfile); | |
348 | ||
349 | outfilefd = creat (tempfile, S_IREAD | S_IWRITE); | |
350 | if (outfilefd < 0) | |
351 | { | |
352 | close (filefd); | |
6f89d28a MB |
353 | report_file_error ("Opening process output file", |
354 | Fcons (build_string (tempfile), Qnil)); | |
7e6c2178 | 355 | } |
6f89d28a | 356 | fd[0] = filefd; |
2610078a | 357 | fd[1] = outfilefd; |
6f89d28a | 358 | #endif /* MSDOS */ |
7e6c2178 | 359 | |
d50d3dc8 | 360 | if (INTEGERP (buffer)) |
5437e9f9 | 361 | fd[1] = open (NULL_DEVICE, O_WRONLY), fd[0] = -1; |
80856e74 JB |
362 | else |
363 | { | |
7e6c2178 | 364 | #ifndef MSDOS |
80856e74 | 365 | pipe (fd); |
7e6c2178 | 366 | #endif |
80856e74 JB |
367 | #if 0 |
368 | /* Replaced by close_process_descs */ | |
369 | set_exclusive_use (fd[0]); | |
370 | #endif | |
371 | } | |
372 | ||
373 | { | |
374 | /* child_setup must clobber environ in systems with true vfork. | |
375 | Protect it from permanent change. */ | |
376 | register char **save_environ = environ; | |
377 | register int fd1 = fd[1]; | |
39eaa782 | 378 | int fd_error = fd1; |
80856e74 JB |
379 | |
380 | #if 0 /* Some systems don't have sigblock. */ | |
e065a56e | 381 | mask = sigblock (sigmask (SIGCHLD)); |
80856e74 JB |
382 | #endif |
383 | ||
384 | /* Record that we're about to create a synchronous process. */ | |
385 | synch_process_alive = 1; | |
386 | ||
5c03767e RS |
387 | /* These vars record information from process termination. |
388 | Clear them now before process can possibly terminate, | |
389 | to avoid timing error if process terminates soon. */ | |
390 | synch_process_death = 0; | |
391 | synch_process_retcode = 0; | |
392 | ||
39eaa782 RS |
393 | if (NILP (error_file)) |
394 | fd_error = open (NULL_DEVICE, O_WRONLY); | |
395 | else if (STRINGP (error_file)) | |
396 | { | |
397 | #ifdef DOS_NT | |
398 | fd_error = open (XSTRING (error_file)->data, | |
399 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, | |
400 | S_IREAD | S_IWRITE); | |
401 | #else /* not DOS_NT */ | |
402 | fd_error = creat (XSTRING (error_file)->data, 0666); | |
403 | #endif /* not DOS_NT */ | |
404 | } | |
405 | ||
406 | if (fd_error < 0) | |
407 | { | |
408 | close (filefd); | |
6f89d28a MB |
409 | if (fd[0] != filefd) |
410 | close (fd[0]); | |
39eaa782 RS |
411 | if (fd1 >= 0) |
412 | close (fd1); | |
6f89d28a MB |
413 | #ifdef MSDOS |
414 | unlink (tempfile); | |
415 | #endif | |
416 | report_file_error ("Cannot redirect stderr", | |
417 | Fcons ((NILP (error_file) | |
418 | ? build_string (NULL_DEVICE) : error_file), | |
419 | Qnil)); | |
39eaa782 | 420 | } |
2610078a KH |
421 | #ifdef MSDOS /* MW, July 1993 */ |
422 | /* ??? Someone who knows MSDOG needs to check whether this properly | |
423 | closes all descriptors that it opens. | |
424 | ||
425 | Note that run_msdos_command() actually returns the child process | |
426 | exit status, not its PID, so we assign it to `synch_process_retcode' | |
427 | below. */ | |
428 | pid = run_msdos_command (new_argv, current_dir, | |
429 | filefd, outfilefd, fd_error); | |
39eaa782 | 430 | |
2610078a KH |
431 | /* Record that the synchronous process exited and note its |
432 | termination status. */ | |
433 | synch_process_alive = 0; | |
434 | synch_process_retcode = pid; | |
435 | if (synch_process_retcode < 0) /* means it couldn't be exec'ed */ | |
436 | synch_process_death = strerror(errno); | |
437 | ||
438 | close (outfilefd); | |
439 | if (fd_error != outfilefd) | |
440 | close (fd_error); | |
441 | fd1 = -1; /* No harm in closing that one! */ | |
442 | fd[0] = open (tempfile, NILP (Vbinary_process_output) ? O_TEXT : O_BINARY); | |
443 | if (fd[0] < 0) | |
444 | { | |
445 | unlink (tempfile); | |
446 | close (filefd); | |
447 | report_file_error ("Cannot re-open temporary file", Qnil); | |
448 | } | |
449 | #else /* not MSDOS */ | |
bad95d8f | 450 | #ifdef WINDOWSNT |
39eaa782 | 451 | pid = child_setup (filefd, fd1, fd_error, new_argv, 0, current_dir); |
bad95d8f | 452 | #else /* not WINDOWSNT */ |
80856e74 JB |
453 | pid = vfork (); |
454 | ||
455 | if (pid == 0) | |
456 | { | |
457 | if (fd[0] >= 0) | |
458 | close (fd[0]); | |
6b2cd868 | 459 | #if defined(USG) && !defined(BSD_PGRPS) |
80856e74 JB |
460 | setpgrp (); |
461 | #else | |
462 | setpgrp (pid, pid); | |
463 | #endif /* USG */ | |
39eaa782 | 464 | child_setup (filefd, fd1, fd_error, new_argv, 0, current_dir); |
80856e74 | 465 | } |
bad95d8f | 466 | #endif /* not WINDOWSNT */ |
cd5f8f60 RS |
467 | |
468 | /* The MSDOS case did this already. */ | |
469 | if (fd_error >= 0) | |
470 | close (fd_error); | |
2610078a | 471 | #endif /* not MSDOS */ |
80856e74 | 472 | |
80856e74 JB |
473 | environ = save_environ; |
474 | ||
6b6e798b RS |
475 | /* Close most of our fd's, but not fd[0] |
476 | since we will use that to read input from. */ | |
80856e74 | 477 | close (filefd); |
799abb26 | 478 | if (fd1 >= 0 && fd1 != fd_error) |
7e6c2178 | 479 | close (fd1); |
80856e74 JB |
480 | } |
481 | ||
482 | if (pid < 0) | |
483 | { | |
6b6e798b RS |
484 | if (fd[0] >= 0) |
485 | close (fd[0]); | |
80856e74 JB |
486 | report_file_error ("Doing vfork", Qnil); |
487 | } | |
488 | ||
d50d3dc8 | 489 | if (INTEGERP (buffer)) |
80856e74 | 490 | { |
6b6e798b RS |
491 | if (fd[0] >= 0) |
492 | close (fd[0]); | |
80856e74 | 493 | #ifndef subprocesses |
e576cab4 JB |
494 | /* If Emacs has been built with asynchronous subprocess support, |
495 | we don't need to do this, I think because it will then have | |
496 | the facilities for handling SIGCHLD. */ | |
80856e74 JB |
497 | wait_without_blocking (); |
498 | #endif /* subprocesses */ | |
80856e74 JB |
499 | return Qnil; |
500 | } | |
501 | ||
6b6e798b | 502 | /* Enable sending signal if user quits below. */ |
37d54121 RS |
503 | call_process_exited = 0; |
504 | ||
7e6c2178 RS |
505 | #ifdef MSDOS |
506 | /* MSDOS needs different cleanup information. */ | |
507 | record_unwind_protect (call_process_cleanup, | |
508 | Fcons (make_number (fd[0]), build_string (tempfile))); | |
509 | #else | |
80856e74 JB |
510 | record_unwind_protect (call_process_cleanup, |
511 | Fcons (make_number (fd[0]), make_number (pid))); | |
7e6c2178 | 512 | #endif /* not MSDOS */ |
80856e74 JB |
513 | |
514 | ||
d50d3dc8 | 515 | if (BUFFERP (buffer)) |
80856e74 JB |
516 | Fset_buffer (buffer); |
517 | ||
518 | immediate_quit = 1; | |
519 | QUIT; | |
520 | ||
521 | { | |
522 | register int nread; | |
0ad477db | 523 | int first = 1; |
6e3bfbb2 | 524 | int total_read = 0; |
80856e74 | 525 | |
60558b19 | 526 | while (1) |
80856e74 | 527 | { |
60558b19 RS |
528 | /* Repeatedly read until we've filled as much as possible |
529 | of the buffer size we have. But don't read | |
8e6208c5 | 530 | less than 1024--save that for the next bufferful. */ |
60558b19 RS |
531 | |
532 | nread = 0; | |
533 | while (nread < bufsize - 1024) | |
00fb3e95 | 534 | { |
60558b19 RS |
535 | int this_read |
536 | = read (fd[0], bufptr + nread, bufsize - nread); | |
537 | ||
538 | if (this_read < 0) | |
539 | goto give_up; | |
540 | ||
541 | if (this_read == 0) | |
542 | goto give_up_1; | |
543 | ||
544 | nread += this_read; | |
00fb3e95 | 545 | } |
60558b19 RS |
546 | |
547 | give_up_1: | |
548 | ||
549 | /* Now NREAD is the total amount of data in the buffer. */ | |
550 | if (nread == 0) | |
551 | break; | |
552 | ||
80856e74 | 553 | immediate_quit = 0; |
6e3bfbb2 RS |
554 | total_read += nread; |
555 | ||
012c6fcb | 556 | if (!NILP (buffer)) |
6e3bfbb2 RS |
557 | insert (bufptr, nread); |
558 | ||
559 | /* Make the buffer bigger as we continue to read more data, | |
560 | but not past 64k. */ | |
561 | if (bufsize < 64 * 1024 && total_read > 32 * bufsize) | |
562 | { | |
563 | bufsize *= 2; | |
564 | bufptr = (char *) alloca (bufsize); | |
565 | } | |
566 | ||
012c6fcb | 567 | if (!NILP (display) && INTERACTIVE) |
0ad477db RS |
568 | { |
569 | if (first) | |
570 | prepare_menu_bars (); | |
571 | first = 0; | |
572 | redisplay_preserve_echo_area (); | |
573 | } | |
80856e74 JB |
574 | immediate_quit = 1; |
575 | QUIT; | |
576 | } | |
60558b19 | 577 | give_up: ; |
80856e74 JB |
578 | } |
579 | ||
580 | /* Wait for it to terminate, unless it already has. */ | |
581 | wait_for_termination (pid); | |
582 | ||
583 | immediate_quit = 0; | |
584 | ||
585 | set_buffer_internal (old); | |
586 | ||
37d54121 RS |
587 | /* Don't kill any children that the subprocess may have left behind |
588 | when exiting. */ | |
589 | call_process_exited = 1; | |
590 | ||
80856e74 JB |
591 | unbind_to (count, Qnil); |
592 | ||
80856e74 JB |
593 | if (synch_process_death) |
594 | return build_string (synch_process_death); | |
595 | return make_number (synch_process_retcode); | |
596 | } | |
597 | #endif | |
598 | \f | |
9fefd2ba | 599 | static Lisp_Object |
80856e74 JB |
600 | delete_temp_file (name) |
601 | Lisp_Object name; | |
602 | { | |
2e3dc201 | 603 | /* Use Fdelete_file (indirectly) because that runs a file name handler. |
59750d69 | 604 | We did that when writing the file, so we should do so when deleting. */ |
2e3dc201 | 605 | internal_delete_file (name); |
80856e74 JB |
606 | } |
607 | ||
608 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
609 | 3, MANY, 0, | |
610 | "Send text from START to END to a synchronous process running PROGRAM.\n\ | |
611 | Delete the text if fourth arg DELETE is non-nil.\n\ | |
39eaa782 | 612 | \n\ |
80856e74 JB |
613 | Insert output in BUFFER before point; t means current buffer;\n\ |
614 | nil for BUFFER means discard it; 0 means discard and don't wait.\n\ | |
39eaa782 RS |
615 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,\n\ |
616 | REAL-BUFFER says what to do with standard output, as above,\n\ | |
617 | while STDERR-FILE says what to do with standard error in the child.\n\ | |
618 | STDERR-FILE may be nil (discard standard error output),\n\ | |
619 | t (mix it with ordinary output), or a file name string.\n\ | |
620 | \n\ | |
80856e74 JB |
621 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.\n\ |
622 | Remaining args are passed to PROGRAM at startup as command args.\n\ | |
39eaa782 RS |
623 | \n\ |
624 | If BUFFER is nil, `call-process-region' returns immediately with value nil.\n\ | |
625 | Otherwise it waits for PROGRAM to terminate\n\ | |
e576cab4 | 626 | and returns a numeric exit status or a signal description string.\n\ |
d177f194 | 627 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.") |
80856e74 JB |
628 | (nargs, args) |
629 | int nargs; | |
630 | register Lisp_Object *args; | |
631 | { | |
39323a7e KH |
632 | struct gcpro gcpro1; |
633 | Lisp_Object filename_string; | |
634 | register Lisp_Object start, end; | |
bad95d8f | 635 | #ifdef DOS_NT |
7e6c2178 RS |
636 | char *tempfile; |
637 | #else | |
80856e74 | 638 | char tempfile[20]; |
7e6c2178 | 639 | #endif |
80856e74 | 640 | int count = specpdl_ptr - specpdl; |
bad95d8f | 641 | #ifdef DOS_NT |
7e6c2178 RS |
642 | char *outf = '\0'; |
643 | ||
644 | if ((outf = egetenv ("TMP")) || (outf = egetenv ("TEMP"))) | |
645 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); | |
646 | else | |
647 | { | |
648 | tempfile = alloca (20); | |
649 | *tempfile = '\0'; | |
650 | } | |
0774fcf8 | 651 | if (!IS_DIRECTORY_SEP (tempfile[strlen (tempfile) - 1])) |
7e6c2178 | 652 | strcat (tempfile, "/"); |
5711b547 RS |
653 | if ('/' == DIRECTORY_SEP) |
654 | dostounix_filename (tempfile); | |
655 | else | |
656 | unixtodos_filename (tempfile); | |
0774fcf8 RS |
657 | #ifdef WINDOWSNT |
658 | strcat (tempfile, "emXXXXXX"); | |
659 | #else | |
7e6c2178 | 660 | strcat (tempfile, "detmp.XXX"); |
0774fcf8 | 661 | #endif |
bad95d8f | 662 | #else /* not DOS_NT */ |
80856e74 JB |
663 | |
664 | #ifdef VMS | |
665 | strcpy (tempfile, "tmp:emacsXXXXXX."); | |
666 | #else | |
667 | strcpy (tempfile, "/tmp/emacsXXXXXX"); | |
668 | #endif | |
bad95d8f | 669 | #endif /* not DOS_NT */ |
7e6c2178 | 670 | |
80856e74 JB |
671 | mktemp (tempfile); |
672 | ||
673 | filename_string = build_string (tempfile); | |
39323a7e | 674 | GCPRO1 (filename_string); |
80856e74 JB |
675 | start = args[0]; |
676 | end = args[1]; | |
bad95d8f | 677 | #ifdef DOS_NT |
093650fe | 678 | specbind (Qbuffer_file_type, Vbinary_process_input); |
bc4498bb | 679 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil); |
093650fe | 680 | unbind_to (count, Qnil); |
bad95d8f | 681 | #else /* not DOS_NT */ |
bc4498bb | 682 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil); |
bad95d8f | 683 | #endif /* not DOS_NT */ |
093650fe | 684 | |
80856e74 JB |
685 | record_unwind_protect (delete_temp_file, filename_string); |
686 | ||
012c6fcb | 687 | if (!NILP (args[3])) |
80856e74 JB |
688 | Fdelete_region (start, end); |
689 | ||
690 | args[3] = filename_string; | |
80856e74 | 691 | |
39323a7e | 692 | RETURN_UNGCPRO (unbind_to (count, Fcall_process (nargs - 2, args + 2))); |
80856e74 JB |
693 | } |
694 | \f | |
695 | #ifndef VMS /* VMS version is in vmsproc.c. */ | |
696 | ||
697 | /* This is the last thing run in a newly forked inferior | |
698 | either synchronous or asynchronous. | |
699 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
700 | Initialize inferior's priority, pgrp, connected dir and environment. | |
701 | then exec another program based on new_argv. | |
702 | ||
703 | This function may change environ for the superior process. | |
704 | Therefore, the superior process must save and restore the value | |
705 | of environ around the vfork and the call to this function. | |
706 | ||
707 | ENV is the environment for the subprocess. | |
708 | ||
709 | SET_PGRP is nonzero if we should put the subprocess into a separate | |
e576cab4 JB |
710 | process group. |
711 | ||
712 | CURRENT_DIR is an elisp string giving the path of the current | |
713 | directory the subprocess should have. Since we can't really signal | |
714 | a decent error from within the child, this should be verified as an | |
715 | executable directory by the parent. */ | |
80856e74 | 716 | |
e576cab4 | 717 | child_setup (in, out, err, new_argv, set_pgrp, current_dir) |
80856e74 JB |
718 | int in, out, err; |
719 | register char **new_argv; | |
80856e74 | 720 | int set_pgrp; |
e576cab4 | 721 | Lisp_Object current_dir; |
80856e74 | 722 | { |
7e6c2178 RS |
723 | #ifdef MSDOS |
724 | /* The MSDOS port of gcc cannot fork, vfork, ... so we must call system | |
725 | instead. */ | |
726 | #else /* not MSDOS */ | |
e576cab4 | 727 | char **env; |
7fcf7f05 | 728 | char *pwd_var; |
bad95d8f RS |
729 | #ifdef WINDOWSNT |
730 | int cpid; | |
4252a4bd | 731 | HANDLE handles[3]; |
bad95d8f | 732 | #endif /* WINDOWSNT */ |
e576cab4 | 733 | |
33abe2d9 | 734 | int pid = getpid (); |
80856e74 | 735 | |
68d10241 | 736 | #ifdef SET_EMACS_PRIORITY |
4f0b9d49 JB |
737 | { |
738 | extern int emacs_priority; | |
739 | ||
68d10241 RS |
740 | if (emacs_priority < 0) |
741 | nice (- emacs_priority); | |
4f0b9d49 | 742 | } |
5b633aeb | 743 | #endif |
80856e74 JB |
744 | |
745 | #ifdef subprocesses | |
746 | /* Close Emacs's descriptors that this process should not have. */ | |
747 | close_process_descs (); | |
748 | #endif | |
4458cebe | 749 | close_load_descs (); |
80856e74 JB |
750 | |
751 | /* Note that use of alloca is always safe here. It's obvious for systems | |
752 | that do not have true vfork or that have true (stack) alloca. | |
753 | If using vfork and C_ALLOCA it is safe because that changes | |
754 | the superior's static variables as if the superior had done alloca | |
755 | and will be cleaned up in the usual way. */ | |
e576cab4 | 756 | { |
7fcf7f05 | 757 | register char *temp; |
e576cab4 | 758 | register int i; |
77d78be1 | 759 | |
e576cab4 | 760 | i = XSTRING (current_dir)->size; |
7fcf7f05 RS |
761 | pwd_var = (char *) alloca (i + 6); |
762 | temp = pwd_var + 4; | |
763 | bcopy ("PWD=", pwd_var, 4); | |
e576cab4 | 764 | bcopy (XSTRING (current_dir)->data, temp, i); |
bad95d8f | 765 | if (!IS_DIRECTORY_SEP (temp[i - 1])) temp[i++] = DIRECTORY_SEP; |
e576cab4 JB |
766 | temp[i] = 0; |
767 | ||
768 | /* We can't signal an Elisp error here; we're in a vfork. Since | |
769 | the callers check the current directory before forking, this | |
770 | should only return an error if the directory's permissions | |
771 | are changed between the check and this chdir, but we should | |
772 | at least check. */ | |
773 | if (chdir (temp) < 0) | |
20b25e46 | 774 | _exit (errno); |
7fcf7f05 RS |
775 | |
776 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ | |
bad95d8f | 777 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 778 | temp[--i] = 0; |
e576cab4 | 779 | } |
80856e74 | 780 | |
80856e74 JB |
781 | /* Set `env' to a vector of the strings in Vprocess_environment. */ |
782 | { | |
783 | register Lisp_Object tem; | |
784 | register char **new_env; | |
785 | register int new_length; | |
786 | ||
787 | new_length = 0; | |
788 | for (tem = Vprocess_environment; | |
d50d3dc8 | 789 | CONSP (tem) && STRINGP (XCONS (tem)->car); |
80856e74 JB |
790 | tem = XCONS (tem)->cdr) |
791 | new_length++; | |
792 | ||
7fcf7f05 RS |
793 | /* new_length + 2 to include PWD and terminating 0. */ |
794 | env = new_env = (char **) alloca ((new_length + 2) * sizeof (char *)); | |
795 | ||
796 | /* If we have a PWD envvar, pass one down, | |
797 | but with corrected value. */ | |
798 | if (getenv ("PWD")) | |
799 | *new_env++ = pwd_var; | |
80856e74 | 800 | |
cd9565ba | 801 | /* Copy the Vprocess_environment strings into new_env. */ |
80856e74 | 802 | for (tem = Vprocess_environment; |
d50d3dc8 | 803 | CONSP (tem) && STRINGP (XCONS (tem)->car); |
80856e74 | 804 | tem = XCONS (tem)->cdr) |
cd9565ba RS |
805 | { |
806 | char **ep = env; | |
807 | char *string = (char *) XSTRING (XCONS (tem)->car)->data; | |
808 | /* See if this string duplicates any string already in the env. | |
809 | If so, don't put it in. | |
810 | When an env var has multiple definitions, | |
811 | we keep the definition that comes first in process-environment. */ | |
812 | for (; ep != new_env; ep++) | |
813 | { | |
814 | char *p = *ep, *q = string; | |
815 | while (1) | |
816 | { | |
817 | if (*q == 0) | |
818 | /* The string is malformed; might as well drop it. */ | |
819 | goto duplicate; | |
820 | if (*q != *p) | |
821 | break; | |
822 | if (*q == '=') | |
823 | goto duplicate; | |
824 | p++, q++; | |
825 | } | |
826 | } | |
827 | *new_env++ = string; | |
828 | duplicate: ; | |
829 | } | |
80856e74 JB |
830 | *new_env = 0; |
831 | } | |
bad95d8f RS |
832 | #ifdef WINDOWSNT |
833 | prepare_standard_handles (in, out, err, handles); | |
834 | #else /* not WINDOWSNT */ | |
426b37ae JB |
835 | /* Make sure that in, out, and err are not actually already in |
836 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 837 | started with its standard in, out, or error closed, as might |
426b37ae | 838 | happen under X. */ |
f29f9e4a RS |
839 | { |
840 | int oin = in, oout = out; | |
841 | ||
842 | /* We have to avoid relocating the same descriptor twice! */ | |
843 | ||
844 | in = relocate_fd (in, 3); | |
845 | ||
846 | if (out == oin) | |
847 | out = in; | |
848 | else | |
3e9367e7 | 849 | out = relocate_fd (out, 3); |
f29f9e4a RS |
850 | |
851 | if (err == oin) | |
852 | err = in; | |
853 | else if (err == oout) | |
854 | err = out; | |
855 | else | |
3e9367e7 | 856 | err = relocate_fd (err, 3); |
f29f9e4a | 857 | } |
426b37ae | 858 | |
80856e74 JB |
859 | close (0); |
860 | close (1); | |
861 | close (2); | |
862 | ||
863 | dup2 (in, 0); | |
864 | dup2 (out, 1); | |
865 | dup2 (err, 2); | |
866 | close (in); | |
867 | close (out); | |
868 | close (err); | |
bad95d8f | 869 | #endif /* not WINDOWSNT */ |
80856e74 | 870 | |
6b2cd868 | 871 | #if defined(USG) && !defined(BSD_PGRPS) |
fdba8590 | 872 | #ifndef SETPGRP_RELEASES_CTTY |
e576cab4 | 873 | setpgrp (); /* No arguments but equivalent in this case */ |
fdba8590 | 874 | #endif |
e576cab4 JB |
875 | #else |
876 | setpgrp (pid, pid); | |
877 | #endif /* USG */ | |
a129418f RS |
878 | /* setpgrp_of_tty is incorrect here; it uses input_fd. */ |
879 | EMACS_SET_TTY_PGRP (0, &pid); | |
80856e74 JB |
880 | |
881 | #ifdef vipc | |
882 | something missing here; | |
883 | #endif /* vipc */ | |
884 | ||
bad95d8f RS |
885 | #ifdef WINDOWSNT |
886 | /* Spawn the child. (See ntproc.c:Spawnve). */ | |
887 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); | |
ff27bfbe KH |
888 | if (cpid == -1) |
889 | /* An error occurred while trying to spawn the process. */ | |
890 | report_file_error ("Spawning child process", Qnil); | |
bad95d8f RS |
891 | reset_standard_handles (in, out, err, handles); |
892 | return cpid; | |
893 | #else /* not WINDOWSNT */ | |
80856e74 JB |
894 | /* execvp does not accept an environment arg so the only way |
895 | to pass this environment is to set environ. Our caller | |
896 | is responsible for restoring the ambient value of environ. */ | |
897 | environ = env; | |
898 | execvp (new_argv[0], new_argv); | |
899 | ||
f040c0ba | 900 | write (1, "Can't exec program: ", 20); |
80856e74 | 901 | write (1, new_argv[0], strlen (new_argv[0])); |
d20b8af6 | 902 | write (1, "\n", 1); |
80856e74 | 903 | _exit (1); |
bad95d8f | 904 | #endif /* not WINDOWSNT */ |
7e6c2178 | 905 | #endif /* not MSDOS */ |
80856e74 JB |
906 | } |
907 | ||
426b37ae JB |
908 | /* Move the file descriptor FD so that its number is not less than MIN. |
909 | If the file descriptor is moved at all, the original is freed. */ | |
910 | int | |
911 | relocate_fd (fd, min) | |
912 | int fd, min; | |
913 | { | |
914 | if (fd >= min) | |
915 | return fd; | |
916 | else | |
917 | { | |
918 | int new = dup (fd); | |
919 | if (new == -1) | |
920 | { | |
20c018a0 | 921 | char *message1 = "Error while setting up child: "; |
826c56ac | 922 | char *errmessage = strerror (errno); |
20c018a0 JB |
923 | char *message2 = "\n"; |
924 | write (2, message1, strlen (message1)); | |
826c56ac | 925 | write (2, errmessage, strlen (errmessage)); |
20c018a0 | 926 | write (2, message2, strlen (message2)); |
426b37ae JB |
927 | _exit (1); |
928 | } | |
929 | /* Note that we hold the original FD open while we recurse, | |
930 | to guarantee we'll get a new FD if we need it. */ | |
931 | new = relocate_fd (new, min); | |
932 | close (fd); | |
933 | return new; | |
934 | } | |
935 | } | |
936 | ||
012c6fcb JA |
937 | static int |
938 | getenv_internal (var, varlen, value, valuelen) | |
939 | char *var; | |
940 | int varlen; | |
941 | char **value; | |
942 | int *valuelen; | |
943 | { | |
944 | Lisp_Object scan; | |
945 | ||
946 | for (scan = Vprocess_environment; CONSP (scan); scan = XCONS (scan)->cdr) | |
947 | { | |
c1350752 KH |
948 | Lisp_Object entry; |
949 | ||
950 | entry = XCONS (scan)->car; | |
d50d3dc8 | 951 | if (STRINGP (entry) |
012c6fcb JA |
952 | && XSTRING (entry)->size > varlen |
953 | && XSTRING (entry)->data[varlen] == '=' | |
bad95d8f RS |
954 | #ifdef WINDOWSNT |
955 | /* NT environment variables are case insensitive. */ | |
a9971c6d | 956 | && ! strnicmp (XSTRING (entry)->data, var, varlen) |
bad95d8f | 957 | #else /* not WINDOWSNT */ |
a9971c6d | 958 | && ! bcmp (XSTRING (entry)->data, var, varlen) |
bad95d8f | 959 | #endif /* not WINDOWSNT */ |
a9971c6d | 960 | ) |
012c6fcb JA |
961 | { |
962 | *value = (char *) XSTRING (entry)->data + (varlen + 1); | |
963 | *valuelen = XSTRING (entry)->size - (varlen + 1); | |
964 | return 1; | |
965 | } | |
966 | } | |
967 | ||
968 | return 0; | |
969 | } | |
970 | ||
0ad477db | 971 | DEFUN ("getenv", Fgetenv, Sgetenv, 1, 1, 0, |
012c6fcb JA |
972 | "Return the value of environment variable VAR, as a string.\n\ |
973 | VAR should be a string. Value is nil if VAR is undefined in the environment.\n\ | |
974 | This function consults the variable ``process-environment'' for its value.") | |
975 | (var) | |
976 | Lisp_Object var; | |
977 | { | |
978 | char *value; | |
979 | int valuelen; | |
980 | ||
981 | CHECK_STRING (var, 0); | |
982 | if (getenv_internal (XSTRING (var)->data, XSTRING (var)->size, | |
983 | &value, &valuelen)) | |
984 | return make_string (value, valuelen); | |
985 | else | |
986 | return Qnil; | |
987 | } | |
988 | ||
989 | /* A version of getenv that consults process_environment, easily | |
e576cab4 | 990 | callable from C. */ |
012c6fcb JA |
991 | char * |
992 | egetenv (var) | |
e576cab4 | 993 | char *var; |
012c6fcb JA |
994 | { |
995 | char *value; | |
996 | int valuelen; | |
997 | ||
998 | if (getenv_internal (var, strlen (var), &value, &valuelen)) | |
999 | return value; | |
1000 | else | |
1001 | return 0; | |
1002 | } | |
1003 | ||
80856e74 JB |
1004 | #endif /* not VMS */ |
1005 | \f | |
8de15d69 | 1006 | /* This is run before init_cmdargs. */ |
7e6c2178 | 1007 | |
8de15d69 RS |
1008 | init_callproc_1 () |
1009 | { | |
1010 | char *data_dir = egetenv ("EMACSDATA"); | |
35a2f4b8 KH |
1011 | char *doc_dir = egetenv ("EMACSDOC"); |
1012 | ||
8de15d69 | 1013 | Vdata_directory |
7e6c2178 | 1014 | = Ffile_name_as_directory (build_string (data_dir ? data_dir |
8de15d69 | 1015 | : PATH_DATA)); |
35a2f4b8 KH |
1016 | Vdoc_directory |
1017 | = Ffile_name_as_directory (build_string (doc_dir ? doc_dir | |
1018 | : PATH_DOC)); | |
9453ea7b | 1019 | |
e576cab4 JB |
1020 | /* Check the EMACSPATH environment variable, defaulting to the |
1021 | PATH_EXEC path from paths.h. */ | |
1022 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); | |
80856e74 JB |
1023 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
1024 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
8de15d69 RS |
1025 | } |
1026 | ||
e17f7533 | 1027 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 RS |
1028 | |
1029 | init_callproc () | |
1030 | { | |
1031 | char *data_dir = egetenv ("EMACSDATA"); | |
1032 | ||
1033 | register char * sh; | |
1034 | Lisp_Object tempdir; | |
1035 | ||
05630743 | 1036 | if (initialized && !NILP (Vinstallation_directory)) |
8de15d69 | 1037 | { |
05630743 RS |
1038 | /* Add to the path the lib-src subdir of the installation dir. */ |
1039 | Lisp_Object tem; | |
1040 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1041 | Vinstallation_directory); | |
1042 | if (NILP (Fmember (tem, Vexec_path))) | |
8de15d69 | 1043 | { |
bad95d8f | 1044 | #ifndef DOS_NT |
1a6640ec | 1045 | /* MSDOS uses wrapped binaries, so don't do this. */ |
8de15d69 RS |
1046 | Vexec_path = nconc2 (Vexec_path, Fcons (tem, Qnil)); |
1047 | Vexec_directory = Ffile_name_as_directory (tem); | |
bad95d8f | 1048 | #endif /* not DOS_NT */ |
e17f7533 | 1049 | } |
8de15d69 | 1050 | |
e17f7533 RS |
1051 | /* Maybe use ../etc as well as ../lib-src. */ |
1052 | if (data_dir == 0) | |
1053 | { | |
1054 | tem = Fexpand_file_name (build_string ("etc"), | |
1055 | Vinstallation_directory); | |
1056 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1057 | } |
1058 | } | |
7e933683 RS |
1059 | |
1060 | /* Look for the files that should be in etc. We don't use | |
1061 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1062 | near the executable, and they are never in the build |
7e933683 RS |
1063 | directory when that's different from the source directory. |
1064 | ||
1065 | Instead, if these files are not in the nominal place, we try the | |
1066 | source directory. */ | |
1067 | if (data_dir == 0) | |
1068 | { | |
1069 | Lisp_Object tem, tem1, newdir; | |
1070 | ||
1071 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); | |
1072 | tem1 = Ffile_exists_p (tem); | |
1073 | if (NILP (tem1)) | |
1074 | { | |
1075 | newdir = Fexpand_file_name (build_string ("../etc/"), | |
1076 | build_string (PATH_DUMPLOADSEARCH)); | |
1077 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1078 | tem1 = Ffile_exists_p (tem); | |
1079 | if (!NILP (tem1)) | |
1080 | Vdata_directory = newdir; | |
1081 | } | |
1082 | } | |
80856e74 | 1083 | |
e576cab4 JB |
1084 | tempdir = Fdirectory_file_name (Vexec_directory); |
1085 | if (access (XSTRING (tempdir)->data, 0) < 0) | |
76d5c6cf RS |
1086 | dir_warning ("Warning: arch-dependent data dir (%s) does not exist.\n", |
1087 | Vexec_directory); | |
80856e74 | 1088 | |
e576cab4 JB |
1089 | tempdir = Fdirectory_file_name (Vdata_directory); |
1090 | if (access (XSTRING (tempdir)->data, 0) < 0) | |
76d5c6cf RS |
1091 | dir_warning ("Warning: arch-independent data dir (%s) does not exist.\n", |
1092 | Vdata_directory); | |
e576cab4 | 1093 | |
80856e74 JB |
1094 | #ifdef VMS |
1095 | Vshell_file_name = build_string ("*dcl*"); | |
1096 | #else | |
e576cab4 | 1097 | sh = (char *) getenv ("SHELL"); |
80856e74 JB |
1098 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
1099 | #endif | |
9fefd2ba JB |
1100 | } |
1101 | ||
1102 | set_process_environment () | |
1103 | { | |
1104 | register char **envp; | |
80856e74 | 1105 | |
80856e74 JB |
1106 | Vprocess_environment = Qnil; |
1107 | #ifndef CANNOT_DUMP | |
1108 | if (initialized) | |
1109 | #endif | |
1110 | for (envp = environ; *envp; envp++) | |
1111 | Vprocess_environment = Fcons (build_string (*envp), | |
1112 | Vprocess_environment); | |
80856e74 JB |
1113 | } |
1114 | ||
1115 | syms_of_callproc () | |
1116 | { | |
bad95d8f | 1117 | #ifdef DOS_NT |
093650fe RS |
1118 | Qbuffer_file_type = intern ("buffer-file-type"); |
1119 | staticpro (&Qbuffer_file_type); | |
1120 | ||
1121 | DEFVAR_LISP ("binary-process-input", &Vbinary_process_input, | |
1122 | "*If non-nil then new subprocesses are assumed to take binary input."); | |
1123 | Vbinary_process_input = Qnil; | |
1124 | ||
1125 | DEFVAR_LISP ("binary-process-output", &Vbinary_process_output, | |
7e6c2178 | 1126 | "*If non-nil then new subprocesses are assumed to produce binary output."); |
093650fe | 1127 | Vbinary_process_output = Qnil; |
bad95d8f | 1128 | #endif /* DOS_NT */ |
7e6c2178 | 1129 | |
80856e74 JB |
1130 | DEFVAR_LISP ("shell-file-name", &Vshell_file_name, |
1131 | "*File name to load inferior shells from.\n\ | |
1132 | Initialized from the SHELL environment variable."); | |
1133 | ||
1134 | DEFVAR_LISP ("exec-path", &Vexec_path, | |
1135 | "*List of directories to search programs to run in subprocesses.\n\ | |
1136 | Each element is a string (directory name) or nil (try default directory)."); | |
1137 | ||
1138 | DEFVAR_LISP ("exec-directory", &Vexec_directory, | |
e576cab4 JB |
1139 | "Directory of architecture-dependent files that come with GNU Emacs,\n\ |
1140 | especially executable programs intended for Emacs to invoke."); | |
1141 | ||
1142 | DEFVAR_LISP ("data-directory", &Vdata_directory, | |
1143 | "Directory of architecture-independent files that come with GNU Emacs,\n\ | |
1144 | intended for Emacs to use."); | |
80856e74 | 1145 | |
35a2f4b8 KH |
1146 | DEFVAR_LISP ("doc-directory", &Vdoc_directory, |
1147 | "Directory containing the DOC file that comes with GNU Emacs.\n\ | |
1148 | This is usually the same as data-directory."); | |
1149 | ||
ed61592a JB |
1150 | DEFVAR_LISP ("configure-info-directory", &Vconfigure_info_directory, |
1151 | "For internal use by the build procedure only.\n\ | |
1152 | This is the name of the directory in which the build procedure installed\n\ | |
1153 | Emacs's info files; the default value for Info-default-directory-list\n\ | |
1154 | includes this."); | |
1155 | Vconfigure_info_directory = build_string (PATH_INFO); | |
1156 | ||
80856e74 | 1157 | DEFVAR_LISP ("process-environment", &Vprocess_environment, |
e576cab4 JB |
1158 | "List of environment variables for subprocesses to inherit.\n\ |
1159 | Each element should be a string of the form ENVVARNAME=VALUE.\n\ | |
1160 | The environment which Emacs inherits is placed in this variable\n\ | |
1161 | when Emacs starts."); | |
80856e74 JB |
1162 | |
1163 | #ifndef VMS | |
1164 | defsubr (&Scall_process); | |
012c6fcb | 1165 | defsubr (&Sgetenv); |
986ffb24 | 1166 | #endif |
e576cab4 | 1167 | defsubr (&Scall_process_region); |
80856e74 | 1168 | } |