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> | |
50 | #include "nt.h" | |
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)) | |
d20b8af6 RS |
248 | error_file = Fexpand_file_name (XCONS (XCONS (buffer)->cdr)->car, |
249 | Qnil); | |
39eaa782 RS |
250 | buffer = XCONS (buffer)->car; |
251 | } | |
044512ed | 252 | |
39eaa782 RS |
253 | if (!(EQ (buffer, Qnil) |
254 | || EQ (buffer, Qt) | |
255 | || XFASTINT (buffer) == 0)) | |
e576cab4 | 256 | { |
39eaa782 RS |
257 | Lisp_Object spec_buffer; |
258 | spec_buffer = buffer; | |
259 | buffer = Fget_buffer (buffer); | |
260 | /* Mention the buffer name for a better error message. */ | |
261 | if (NILP (buffer)) | |
262 | CHECK_BUFFER (spec_buffer, 2); | |
e576cab4 JB |
263 | CHECK_BUFFER (buffer, 2); |
264 | } | |
265 | } | |
266 | else | |
267 | buffer = Qnil; | |
80856e74 | 268 | |
58616e67 JB |
269 | /* Make sure that the child will be able to chdir to the current |
270 | buffer's current directory, or its unhandled equivalent. We | |
271 | can't just have the child check for an error when it does the | |
272 | chdir, since it's in a vfork. | |
273 | ||
274 | We have to GCPRO around this because Fexpand_file_name, | |
275 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
276 | might call a file name handling function. The argument list is | |
277 | protected by the caller, so all we really have to worry about is | |
278 | buffer. */ | |
279 | { | |
280 | struct gcpro gcpro1, gcpro2, gcpro3; | |
281 | ||
282 | current_dir = current_buffer->directory; | |
283 | ||
284 | GCPRO3 (infile, buffer, current_dir); | |
285 | ||
c52b0b34 KH |
286 | current_dir |
287 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), | |
288 | Qnil); | |
58616e67 JB |
289 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
290 | report_file_error ("Setting current directory", | |
291 | Fcons (current_buffer->directory, Qnil)); | |
292 | ||
293 | UNGCPRO; | |
294 | } | |
295 | ||
e576cab4 | 296 | display = nargs >= 4 ? args[3] : Qnil; |
80856e74 | 297 | |
e576cab4 | 298 | filefd = open (XSTRING (infile)->data, O_RDONLY, 0); |
80856e74 JB |
299 | if (filefd < 0) |
300 | { | |
e576cab4 | 301 | report_file_error ("Opening process input file", Fcons (infile, Qnil)); |
80856e74 JB |
302 | } |
303 | /* Search for program; barf if not found. */ | |
c52b0b34 KH |
304 | { |
305 | struct gcpro gcpro1; | |
306 | ||
307 | GCPRO1 (current_dir); | |
308 | openp (Vexec_path, args[0], EXEC_SUFFIXES, &path, 1); | |
309 | UNGCPRO; | |
310 | } | |
012c6fcb | 311 | if (NILP (path)) |
80856e74 JB |
312 | { |
313 | close (filefd); | |
314 | report_file_error ("Searching for program", Fcons (args[0], Qnil)); | |
315 | } | |
316 | new_argv[0] = XSTRING (path)->data; | |
c52b0b34 KH |
317 | { |
318 | register int i; | |
319 | for (i = 4; i < nargs; i++) | |
320 | { | |
321 | CHECK_STRING (args[i], i); | |
322 | new_argv[i - 3] = XSTRING (args[i])->data; | |
323 | } | |
324 | new_argv[i - 3] = 0; | |
325 | } | |
80856e74 | 326 | |
7e6c2178 | 327 | #ifdef MSDOS /* MW, July 1993 */ |
7e6c2178 RS |
328 | if ((outf = egetenv ("TMP")) || (outf = egetenv ("TEMP"))) |
329 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); | |
330 | else | |
331 | { | |
332 | tempfile = alloca (20); | |
333 | *tempfile = '\0'; | |
334 | } | |
335 | dostounix_filename (tempfile); | |
336 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') | |
337 | strcat (tempfile, "/"); | |
338 | strcat (tempfile, "detmp.XXX"); | |
339 | mktemp (tempfile); | |
340 | ||
341 | outfilefd = creat (tempfile, S_IREAD | S_IWRITE); | |
342 | if (outfilefd < 0) | |
343 | { | |
344 | close (filefd); | |
345 | report_file_error ("Opening process output file", Fcons (tempfile, Qnil)); | |
346 | } | |
2610078a | 347 | fd[1] = outfilefd; |
7e6c2178 RS |
348 | #endif |
349 | ||
d50d3dc8 | 350 | if (INTEGERP (buffer)) |
5437e9f9 | 351 | fd[1] = open (NULL_DEVICE, O_WRONLY), fd[0] = -1; |
80856e74 JB |
352 | else |
353 | { | |
7e6c2178 | 354 | #ifndef MSDOS |
bad95d8f RS |
355 | #ifdef WINDOWSNT |
356 | pipe_with_inherited_out (fd); | |
357 | #else /* not WINDOWSNT */ | |
80856e74 | 358 | pipe (fd); |
bad95d8f | 359 | #endif /* not WINDOWSNT */ |
7e6c2178 | 360 | #endif |
80856e74 JB |
361 | #if 0 |
362 | /* Replaced by close_process_descs */ | |
363 | set_exclusive_use (fd[0]); | |
364 | #endif | |
365 | } | |
366 | ||
367 | { | |
368 | /* child_setup must clobber environ in systems with true vfork. | |
369 | Protect it from permanent change. */ | |
370 | register char **save_environ = environ; | |
371 | register int fd1 = fd[1]; | |
39eaa782 | 372 | int fd_error = fd1; |
80856e74 JB |
373 | |
374 | #if 0 /* Some systems don't have sigblock. */ | |
e065a56e | 375 | mask = sigblock (sigmask (SIGCHLD)); |
80856e74 JB |
376 | #endif |
377 | ||
378 | /* Record that we're about to create a synchronous process. */ | |
379 | synch_process_alive = 1; | |
380 | ||
5c03767e RS |
381 | /* These vars record information from process termination. |
382 | Clear them now before process can possibly terminate, | |
383 | to avoid timing error if process terminates soon. */ | |
384 | synch_process_death = 0; | |
385 | synch_process_retcode = 0; | |
386 | ||
39eaa782 RS |
387 | if (NILP (error_file)) |
388 | fd_error = open (NULL_DEVICE, O_WRONLY); | |
389 | else if (STRINGP (error_file)) | |
390 | { | |
391 | #ifdef DOS_NT | |
392 | fd_error = open (XSTRING (error_file)->data, | |
393 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, | |
394 | S_IREAD | S_IWRITE); | |
395 | #else /* not DOS_NT */ | |
396 | fd_error = creat (XSTRING (error_file)->data, 0666); | |
397 | #endif /* not DOS_NT */ | |
398 | } | |
399 | ||
400 | if (fd_error < 0) | |
401 | { | |
402 | close (filefd); | |
403 | close (fd[0]); | |
404 | if (fd1 >= 0) | |
405 | close (fd1); | |
406 | report_file_error ("Cannot open", error_file); | |
407 | } | |
2610078a KH |
408 | #ifdef MSDOS /* MW, July 1993 */ |
409 | /* ??? Someone who knows MSDOG needs to check whether this properly | |
410 | closes all descriptors that it opens. | |
411 | ||
412 | Note that run_msdos_command() actually returns the child process | |
413 | exit status, not its PID, so we assign it to `synch_process_retcode' | |
414 | below. */ | |
415 | pid = run_msdos_command (new_argv, current_dir, | |
416 | filefd, outfilefd, fd_error); | |
39eaa782 | 417 | |
2610078a KH |
418 | /* Record that the synchronous process exited and note its |
419 | termination status. */ | |
420 | synch_process_alive = 0; | |
421 | synch_process_retcode = pid; | |
422 | if (synch_process_retcode < 0) /* means it couldn't be exec'ed */ | |
423 | synch_process_death = strerror(errno); | |
424 | ||
425 | close (outfilefd); | |
426 | if (fd_error != outfilefd) | |
427 | close (fd_error); | |
428 | fd1 = -1; /* No harm in closing that one! */ | |
429 | fd[0] = open (tempfile, NILP (Vbinary_process_output) ? O_TEXT : O_BINARY); | |
430 | if (fd[0] < 0) | |
431 | { | |
432 | unlink (tempfile); | |
433 | close (filefd); | |
434 | report_file_error ("Cannot re-open temporary file", Qnil); | |
435 | } | |
436 | #else /* not MSDOS */ | |
bad95d8f | 437 | #ifdef WINDOWSNT |
39eaa782 | 438 | pid = child_setup (filefd, fd1, fd_error, new_argv, 0, current_dir); |
bad95d8f | 439 | #else /* not WINDOWSNT */ |
80856e74 JB |
440 | pid = vfork (); |
441 | ||
442 | if (pid == 0) | |
443 | { | |
444 | if (fd[0] >= 0) | |
445 | close (fd[0]); | |
5a570e37 | 446 | #ifdef USG |
80856e74 JB |
447 | setpgrp (); |
448 | #else | |
449 | setpgrp (pid, pid); | |
450 | #endif /* USG */ | |
39eaa782 | 451 | child_setup (filefd, fd1, fd_error, new_argv, 0, current_dir); |
80856e74 | 452 | } |
bad95d8f | 453 | #endif /* not WINDOWSNT */ |
2610078a | 454 | #endif /* not MSDOS */ |
80856e74 | 455 | |
80856e74 JB |
456 | environ = save_environ; |
457 | ||
6b6e798b RS |
458 | /* Close most of our fd's, but not fd[0] |
459 | since we will use that to read input from. */ | |
80856e74 | 460 | close (filefd); |
7e6c2178 RS |
461 | if (fd1 >= 0) |
462 | close (fd1); | |
80856e74 JB |
463 | } |
464 | ||
465 | if (pid < 0) | |
466 | { | |
6b6e798b RS |
467 | if (fd[0] >= 0) |
468 | close (fd[0]); | |
80856e74 JB |
469 | report_file_error ("Doing vfork", Qnil); |
470 | } | |
471 | ||
d50d3dc8 | 472 | if (INTEGERP (buffer)) |
80856e74 | 473 | { |
6b6e798b RS |
474 | if (fd[0] >= 0) |
475 | close (fd[0]); | |
80856e74 | 476 | #ifndef subprocesses |
e576cab4 JB |
477 | /* If Emacs has been built with asynchronous subprocess support, |
478 | we don't need to do this, I think because it will then have | |
479 | the facilities for handling SIGCHLD. */ | |
80856e74 JB |
480 | wait_without_blocking (); |
481 | #endif /* subprocesses */ | |
80856e74 JB |
482 | return Qnil; |
483 | } | |
484 | ||
6b6e798b | 485 | /* Enable sending signal if user quits below. */ |
37d54121 RS |
486 | call_process_exited = 0; |
487 | ||
7e6c2178 RS |
488 | #ifdef MSDOS |
489 | /* MSDOS needs different cleanup information. */ | |
490 | record_unwind_protect (call_process_cleanup, | |
491 | Fcons (make_number (fd[0]), build_string (tempfile))); | |
492 | #else | |
80856e74 JB |
493 | record_unwind_protect (call_process_cleanup, |
494 | Fcons (make_number (fd[0]), make_number (pid))); | |
7e6c2178 | 495 | #endif /* not MSDOS */ |
80856e74 JB |
496 | |
497 | ||
d50d3dc8 | 498 | if (BUFFERP (buffer)) |
80856e74 JB |
499 | Fset_buffer (buffer); |
500 | ||
501 | immediate_quit = 1; | |
502 | QUIT; | |
503 | ||
504 | { | |
505 | register int nread; | |
0ad477db | 506 | int first = 1; |
6e3bfbb2 | 507 | int total_read = 0; |
80856e74 | 508 | |
60558b19 | 509 | while (1) |
80856e74 | 510 | { |
60558b19 RS |
511 | /* Repeatedly read until we've filled as much as possible |
512 | of the buffer size we have. But don't read | |
8e6208c5 | 513 | less than 1024--save that for the next bufferful. */ |
60558b19 RS |
514 | |
515 | nread = 0; | |
516 | while (nread < bufsize - 1024) | |
00fb3e95 | 517 | { |
60558b19 RS |
518 | int this_read |
519 | = read (fd[0], bufptr + nread, bufsize - nread); | |
520 | ||
521 | if (this_read < 0) | |
522 | goto give_up; | |
523 | ||
524 | if (this_read == 0) | |
525 | goto give_up_1; | |
526 | ||
527 | nread += this_read; | |
00fb3e95 | 528 | } |
60558b19 RS |
529 | |
530 | give_up_1: | |
531 | ||
532 | /* Now NREAD is the total amount of data in the buffer. */ | |
533 | if (nread == 0) | |
534 | break; | |
535 | ||
80856e74 | 536 | immediate_quit = 0; |
6e3bfbb2 RS |
537 | total_read += nread; |
538 | ||
012c6fcb | 539 | if (!NILP (buffer)) |
6e3bfbb2 RS |
540 | insert (bufptr, nread); |
541 | ||
542 | /* Make the buffer bigger as we continue to read more data, | |
543 | but not past 64k. */ | |
544 | if (bufsize < 64 * 1024 && total_read > 32 * bufsize) | |
545 | { | |
546 | bufsize *= 2; | |
547 | bufptr = (char *) alloca (bufsize); | |
548 | } | |
549 | ||
012c6fcb | 550 | if (!NILP (display) && INTERACTIVE) |
0ad477db RS |
551 | { |
552 | if (first) | |
553 | prepare_menu_bars (); | |
554 | first = 0; | |
555 | redisplay_preserve_echo_area (); | |
556 | } | |
80856e74 JB |
557 | immediate_quit = 1; |
558 | QUIT; | |
559 | } | |
60558b19 | 560 | give_up: ; |
80856e74 JB |
561 | } |
562 | ||
563 | /* Wait for it to terminate, unless it already has. */ | |
564 | wait_for_termination (pid); | |
565 | ||
566 | immediate_quit = 0; | |
567 | ||
568 | set_buffer_internal (old); | |
569 | ||
37d54121 RS |
570 | /* Don't kill any children that the subprocess may have left behind |
571 | when exiting. */ | |
572 | call_process_exited = 1; | |
573 | ||
80856e74 JB |
574 | unbind_to (count, Qnil); |
575 | ||
80856e74 JB |
576 | if (synch_process_death) |
577 | return build_string (synch_process_death); | |
578 | return make_number (synch_process_retcode); | |
579 | } | |
580 | #endif | |
581 | \f | |
9fefd2ba | 582 | static Lisp_Object |
80856e74 JB |
583 | delete_temp_file (name) |
584 | Lisp_Object name; | |
585 | { | |
2e3dc201 | 586 | /* Use Fdelete_file (indirectly) because that runs a file name handler. |
59750d69 | 587 | We did that when writing the file, so we should do so when deleting. */ |
2e3dc201 | 588 | internal_delete_file (name); |
80856e74 JB |
589 | } |
590 | ||
591 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
592 | 3, MANY, 0, | |
593 | "Send text from START to END to a synchronous process running PROGRAM.\n\ | |
594 | Delete the text if fourth arg DELETE is non-nil.\n\ | |
39eaa782 | 595 | \n\ |
80856e74 JB |
596 | Insert output in BUFFER before point; t means current buffer;\n\ |
597 | nil for BUFFER means discard it; 0 means discard and don't wait.\n\ | |
39eaa782 RS |
598 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,\n\ |
599 | REAL-BUFFER says what to do with standard output, as above,\n\ | |
600 | while STDERR-FILE says what to do with standard error in the child.\n\ | |
601 | STDERR-FILE may be nil (discard standard error output),\n\ | |
602 | t (mix it with ordinary output), or a file name string.\n\ | |
603 | \n\ | |
80856e74 JB |
604 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.\n\ |
605 | Remaining args are passed to PROGRAM at startup as command args.\n\ | |
39eaa782 RS |
606 | \n\ |
607 | If BUFFER is nil, `call-process-region' returns immediately with value nil.\n\ | |
608 | Otherwise it waits for PROGRAM to terminate\n\ | |
e576cab4 | 609 | and returns a numeric exit status or a signal description string.\n\ |
d177f194 | 610 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.") |
80856e74 JB |
611 | (nargs, args) |
612 | int nargs; | |
613 | register Lisp_Object *args; | |
614 | { | |
39323a7e KH |
615 | struct gcpro gcpro1; |
616 | Lisp_Object filename_string; | |
617 | register Lisp_Object start, end; | |
bad95d8f | 618 | #ifdef DOS_NT |
7e6c2178 RS |
619 | char *tempfile; |
620 | #else | |
80856e74 | 621 | char tempfile[20]; |
7e6c2178 | 622 | #endif |
80856e74 | 623 | int count = specpdl_ptr - specpdl; |
bad95d8f | 624 | #ifdef DOS_NT |
7e6c2178 RS |
625 | char *outf = '\0'; |
626 | ||
627 | if ((outf = egetenv ("TMP")) || (outf = egetenv ("TEMP"))) | |
628 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); | |
629 | else | |
630 | { | |
631 | tempfile = alloca (20); | |
632 | *tempfile = '\0'; | |
633 | } | |
634 | dostounix_filename (tempfile); | |
0774fcf8 | 635 | if (!IS_DIRECTORY_SEP (tempfile[strlen (tempfile) - 1])) |
7e6c2178 | 636 | strcat (tempfile, "/"); |
0774fcf8 RS |
637 | #ifdef WINDOWSNT |
638 | strcat (tempfile, "emXXXXXX"); | |
639 | #else | |
7e6c2178 | 640 | strcat (tempfile, "detmp.XXX"); |
0774fcf8 | 641 | #endif |
bad95d8f | 642 | #else /* not DOS_NT */ |
80856e74 JB |
643 | |
644 | #ifdef VMS | |
645 | strcpy (tempfile, "tmp:emacsXXXXXX."); | |
646 | #else | |
647 | strcpy (tempfile, "/tmp/emacsXXXXXX"); | |
648 | #endif | |
bad95d8f | 649 | #endif /* not DOS_NT */ |
7e6c2178 | 650 | |
80856e74 JB |
651 | mktemp (tempfile); |
652 | ||
653 | filename_string = build_string (tempfile); | |
39323a7e | 654 | GCPRO1 (filename_string); |
80856e74 JB |
655 | start = args[0]; |
656 | end = args[1]; | |
bad95d8f | 657 | #ifdef DOS_NT |
093650fe | 658 | specbind (Qbuffer_file_type, Vbinary_process_input); |
bc4498bb | 659 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil); |
093650fe | 660 | unbind_to (count, Qnil); |
bad95d8f | 661 | #else /* not DOS_NT */ |
bc4498bb | 662 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil); |
bad95d8f | 663 | #endif /* not DOS_NT */ |
093650fe | 664 | |
80856e74 JB |
665 | record_unwind_protect (delete_temp_file, filename_string); |
666 | ||
012c6fcb | 667 | if (!NILP (args[3])) |
80856e74 JB |
668 | Fdelete_region (start, end); |
669 | ||
670 | args[3] = filename_string; | |
80856e74 | 671 | |
39323a7e | 672 | RETURN_UNGCPRO (unbind_to (count, Fcall_process (nargs - 2, args + 2))); |
80856e74 JB |
673 | } |
674 | \f | |
675 | #ifndef VMS /* VMS version is in vmsproc.c. */ | |
676 | ||
677 | /* This is the last thing run in a newly forked inferior | |
678 | either synchronous or asynchronous. | |
679 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
680 | Initialize inferior's priority, pgrp, connected dir and environment. | |
681 | then exec another program based on new_argv. | |
682 | ||
683 | This function may change environ for the superior process. | |
684 | Therefore, the superior process must save and restore the value | |
685 | of environ around the vfork and the call to this function. | |
686 | ||
687 | ENV is the environment for the subprocess. | |
688 | ||
689 | SET_PGRP is nonzero if we should put the subprocess into a separate | |
e576cab4 JB |
690 | process group. |
691 | ||
692 | CURRENT_DIR is an elisp string giving the path of the current | |
693 | directory the subprocess should have. Since we can't really signal | |
694 | a decent error from within the child, this should be verified as an | |
695 | executable directory by the parent. */ | |
80856e74 | 696 | |
e576cab4 | 697 | child_setup (in, out, err, new_argv, set_pgrp, current_dir) |
80856e74 JB |
698 | int in, out, err; |
699 | register char **new_argv; | |
80856e74 | 700 | int set_pgrp; |
e576cab4 | 701 | Lisp_Object current_dir; |
80856e74 | 702 | { |
7e6c2178 RS |
703 | #ifdef MSDOS |
704 | /* The MSDOS port of gcc cannot fork, vfork, ... so we must call system | |
705 | instead. */ | |
706 | #else /* not MSDOS */ | |
e576cab4 | 707 | char **env; |
7fcf7f05 | 708 | char *pwd_var; |
bad95d8f RS |
709 | #ifdef WINDOWSNT |
710 | int cpid; | |
711 | HANDLE handles[4]; | |
712 | #endif /* WINDOWSNT */ | |
e576cab4 | 713 | |
33abe2d9 | 714 | int pid = getpid (); |
80856e74 | 715 | |
68d10241 | 716 | #ifdef SET_EMACS_PRIORITY |
4f0b9d49 JB |
717 | { |
718 | extern int emacs_priority; | |
719 | ||
68d10241 RS |
720 | if (emacs_priority < 0) |
721 | nice (- emacs_priority); | |
4f0b9d49 | 722 | } |
5b633aeb | 723 | #endif |
80856e74 JB |
724 | |
725 | #ifdef subprocesses | |
726 | /* Close Emacs's descriptors that this process should not have. */ | |
727 | close_process_descs (); | |
728 | #endif | |
4458cebe | 729 | close_load_descs (); |
80856e74 JB |
730 | |
731 | /* Note that use of alloca is always safe here. It's obvious for systems | |
732 | that do not have true vfork or that have true (stack) alloca. | |
733 | If using vfork and C_ALLOCA it is safe because that changes | |
734 | the superior's static variables as if the superior had done alloca | |
735 | and will be cleaned up in the usual way. */ | |
e576cab4 | 736 | { |
7fcf7f05 | 737 | register char *temp; |
e576cab4 | 738 | register int i; |
77d78be1 | 739 | |
e576cab4 | 740 | i = XSTRING (current_dir)->size; |
7fcf7f05 RS |
741 | pwd_var = (char *) alloca (i + 6); |
742 | temp = pwd_var + 4; | |
743 | bcopy ("PWD=", pwd_var, 4); | |
e576cab4 | 744 | bcopy (XSTRING (current_dir)->data, temp, i); |
bad95d8f | 745 | if (!IS_DIRECTORY_SEP (temp[i - 1])) temp[i++] = DIRECTORY_SEP; |
e576cab4 JB |
746 | temp[i] = 0; |
747 | ||
748 | /* We can't signal an Elisp error here; we're in a vfork. Since | |
749 | the callers check the current directory before forking, this | |
750 | should only return an error if the directory's permissions | |
751 | are changed between the check and this chdir, but we should | |
752 | at least check. */ | |
753 | if (chdir (temp) < 0) | |
20b25e46 | 754 | _exit (errno); |
7fcf7f05 RS |
755 | |
756 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ | |
bad95d8f | 757 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 758 | temp[--i] = 0; |
e576cab4 | 759 | } |
80856e74 | 760 | |
80856e74 JB |
761 | /* Set `env' to a vector of the strings in Vprocess_environment. */ |
762 | { | |
763 | register Lisp_Object tem; | |
764 | register char **new_env; | |
765 | register int new_length; | |
766 | ||
767 | new_length = 0; | |
768 | for (tem = Vprocess_environment; | |
d50d3dc8 | 769 | CONSP (tem) && STRINGP (XCONS (tem)->car); |
80856e74 JB |
770 | tem = XCONS (tem)->cdr) |
771 | new_length++; | |
772 | ||
7fcf7f05 RS |
773 | /* new_length + 2 to include PWD and terminating 0. */ |
774 | env = new_env = (char **) alloca ((new_length + 2) * sizeof (char *)); | |
775 | ||
776 | /* If we have a PWD envvar, pass one down, | |
777 | but with corrected value. */ | |
778 | if (getenv ("PWD")) | |
779 | *new_env++ = pwd_var; | |
80856e74 | 780 | |
cd9565ba | 781 | /* Copy the Vprocess_environment strings into new_env. */ |
80856e74 | 782 | for (tem = Vprocess_environment; |
d50d3dc8 | 783 | CONSP (tem) && STRINGP (XCONS (tem)->car); |
80856e74 | 784 | tem = XCONS (tem)->cdr) |
cd9565ba RS |
785 | { |
786 | char **ep = env; | |
787 | char *string = (char *) XSTRING (XCONS (tem)->car)->data; | |
788 | /* See if this string duplicates any string already in the env. | |
789 | If so, don't put it in. | |
790 | When an env var has multiple definitions, | |
791 | we keep the definition that comes first in process-environment. */ | |
792 | for (; ep != new_env; ep++) | |
793 | { | |
794 | char *p = *ep, *q = string; | |
795 | while (1) | |
796 | { | |
797 | if (*q == 0) | |
798 | /* The string is malformed; might as well drop it. */ | |
799 | goto duplicate; | |
800 | if (*q != *p) | |
801 | break; | |
802 | if (*q == '=') | |
803 | goto duplicate; | |
804 | p++, q++; | |
805 | } | |
806 | } | |
807 | *new_env++ = string; | |
808 | duplicate: ; | |
809 | } | |
80856e74 JB |
810 | *new_env = 0; |
811 | } | |
bad95d8f RS |
812 | #ifdef WINDOWSNT |
813 | prepare_standard_handles (in, out, err, handles); | |
814 | #else /* not WINDOWSNT */ | |
426b37ae JB |
815 | /* Make sure that in, out, and err are not actually already in |
816 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 817 | started with its standard in, out, or error closed, as might |
426b37ae | 818 | happen under X. */ |
f29f9e4a RS |
819 | { |
820 | int oin = in, oout = out; | |
821 | ||
822 | /* We have to avoid relocating the same descriptor twice! */ | |
823 | ||
824 | in = relocate_fd (in, 3); | |
825 | ||
826 | if (out == oin) | |
827 | out = in; | |
828 | else | |
3e9367e7 | 829 | out = relocate_fd (out, 3); |
f29f9e4a RS |
830 | |
831 | if (err == oin) | |
832 | err = in; | |
833 | else if (err == oout) | |
834 | err = out; | |
835 | else | |
3e9367e7 | 836 | err = relocate_fd (err, 3); |
f29f9e4a | 837 | } |
426b37ae | 838 | |
80856e74 JB |
839 | close (0); |
840 | close (1); | |
841 | close (2); | |
842 | ||
843 | dup2 (in, 0); | |
844 | dup2 (out, 1); | |
845 | dup2 (err, 2); | |
846 | close (in); | |
847 | close (out); | |
848 | close (err); | |
bad95d8f | 849 | #endif /* not WINDOWSNT */ |
80856e74 | 850 | |
fdba8590 RS |
851 | #ifdef USG |
852 | #ifndef SETPGRP_RELEASES_CTTY | |
e576cab4 | 853 | setpgrp (); /* No arguments but equivalent in this case */ |
fdba8590 | 854 | #endif |
e576cab4 JB |
855 | #else |
856 | setpgrp (pid, pid); | |
857 | #endif /* USG */ | |
a129418f RS |
858 | /* setpgrp_of_tty is incorrect here; it uses input_fd. */ |
859 | EMACS_SET_TTY_PGRP (0, &pid); | |
80856e74 JB |
860 | |
861 | #ifdef vipc | |
862 | something missing here; | |
863 | #endif /* vipc */ | |
864 | ||
bad95d8f RS |
865 | #ifdef WINDOWSNT |
866 | /* Spawn the child. (See ntproc.c:Spawnve). */ | |
867 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); | |
ff27bfbe KH |
868 | if (cpid == -1) |
869 | /* An error occurred while trying to spawn the process. */ | |
870 | report_file_error ("Spawning child process", Qnil); | |
bad95d8f RS |
871 | reset_standard_handles (in, out, err, handles); |
872 | return cpid; | |
873 | #else /* not WINDOWSNT */ | |
80856e74 JB |
874 | /* execvp does not accept an environment arg so the only way |
875 | to pass this environment is to set environ. Our caller | |
876 | is responsible for restoring the ambient value of environ. */ | |
877 | environ = env; | |
878 | execvp (new_argv[0], new_argv); | |
879 | ||
d20b8af6 | 880 | write (1, "Can't exec program: ", 26); |
80856e74 | 881 | write (1, new_argv[0], strlen (new_argv[0])); |
d20b8af6 | 882 | write (1, "\n", 1); |
80856e74 | 883 | _exit (1); |
bad95d8f | 884 | #endif /* not WINDOWSNT */ |
7e6c2178 | 885 | #endif /* not MSDOS */ |
80856e74 JB |
886 | } |
887 | ||
426b37ae JB |
888 | /* Move the file descriptor FD so that its number is not less than MIN. |
889 | If the file descriptor is moved at all, the original is freed. */ | |
890 | int | |
891 | relocate_fd (fd, min) | |
892 | int fd, min; | |
893 | { | |
894 | if (fd >= min) | |
895 | return fd; | |
896 | else | |
897 | { | |
898 | int new = dup (fd); | |
899 | if (new == -1) | |
900 | { | |
20c018a0 | 901 | char *message1 = "Error while setting up child: "; |
826c56ac | 902 | char *errmessage = strerror (errno); |
20c018a0 JB |
903 | char *message2 = "\n"; |
904 | write (2, message1, strlen (message1)); | |
826c56ac | 905 | write (2, errmessage, strlen (errmessage)); |
20c018a0 | 906 | write (2, message2, strlen (message2)); |
426b37ae JB |
907 | _exit (1); |
908 | } | |
909 | /* Note that we hold the original FD open while we recurse, | |
910 | to guarantee we'll get a new FD if we need it. */ | |
911 | new = relocate_fd (new, min); | |
912 | close (fd); | |
913 | return new; | |
914 | } | |
915 | } | |
916 | ||
012c6fcb JA |
917 | static int |
918 | getenv_internal (var, varlen, value, valuelen) | |
919 | char *var; | |
920 | int varlen; | |
921 | char **value; | |
922 | int *valuelen; | |
923 | { | |
924 | Lisp_Object scan; | |
925 | ||
926 | for (scan = Vprocess_environment; CONSP (scan); scan = XCONS (scan)->cdr) | |
927 | { | |
c1350752 KH |
928 | Lisp_Object entry; |
929 | ||
930 | entry = XCONS (scan)->car; | |
d50d3dc8 | 931 | if (STRINGP (entry) |
012c6fcb JA |
932 | && XSTRING (entry)->size > varlen |
933 | && XSTRING (entry)->data[varlen] == '=' | |
bad95d8f RS |
934 | #ifdef WINDOWSNT |
935 | /* NT environment variables are case insensitive. */ | |
a9971c6d | 936 | && ! strnicmp (XSTRING (entry)->data, var, varlen) |
bad95d8f | 937 | #else /* not WINDOWSNT */ |
a9971c6d | 938 | && ! bcmp (XSTRING (entry)->data, var, varlen) |
bad95d8f | 939 | #endif /* not WINDOWSNT */ |
a9971c6d | 940 | ) |
012c6fcb JA |
941 | { |
942 | *value = (char *) XSTRING (entry)->data + (varlen + 1); | |
943 | *valuelen = XSTRING (entry)->size - (varlen + 1); | |
944 | return 1; | |
945 | } | |
946 | } | |
947 | ||
948 | return 0; | |
949 | } | |
950 | ||
0ad477db | 951 | DEFUN ("getenv", Fgetenv, Sgetenv, 1, 1, 0, |
012c6fcb JA |
952 | "Return the value of environment variable VAR, as a string.\n\ |
953 | VAR should be a string. Value is nil if VAR is undefined in the environment.\n\ | |
954 | This function consults the variable ``process-environment'' for its value.") | |
955 | (var) | |
956 | Lisp_Object var; | |
957 | { | |
958 | char *value; | |
959 | int valuelen; | |
960 | ||
961 | CHECK_STRING (var, 0); | |
962 | if (getenv_internal (XSTRING (var)->data, XSTRING (var)->size, | |
963 | &value, &valuelen)) | |
964 | return make_string (value, valuelen); | |
965 | else | |
966 | return Qnil; | |
967 | } | |
968 | ||
969 | /* A version of getenv that consults process_environment, easily | |
e576cab4 | 970 | callable from C. */ |
012c6fcb JA |
971 | char * |
972 | egetenv (var) | |
e576cab4 | 973 | char *var; |
012c6fcb JA |
974 | { |
975 | char *value; | |
976 | int valuelen; | |
977 | ||
978 | if (getenv_internal (var, strlen (var), &value, &valuelen)) | |
979 | return value; | |
980 | else | |
981 | return 0; | |
982 | } | |
983 | ||
80856e74 JB |
984 | #endif /* not VMS */ |
985 | \f | |
8de15d69 | 986 | /* This is run before init_cmdargs. */ |
7e6c2178 | 987 | |
8de15d69 RS |
988 | init_callproc_1 () |
989 | { | |
990 | char *data_dir = egetenv ("EMACSDATA"); | |
35a2f4b8 KH |
991 | char *doc_dir = egetenv ("EMACSDOC"); |
992 | ||
8de15d69 | 993 | Vdata_directory |
7e6c2178 | 994 | = Ffile_name_as_directory (build_string (data_dir ? data_dir |
8de15d69 | 995 | : PATH_DATA)); |
35a2f4b8 KH |
996 | Vdoc_directory |
997 | = Ffile_name_as_directory (build_string (doc_dir ? doc_dir | |
998 | : PATH_DOC)); | |
9453ea7b | 999 | |
e576cab4 JB |
1000 | /* Check the EMACSPATH environment variable, defaulting to the |
1001 | PATH_EXEC path from paths.h. */ | |
1002 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); | |
80856e74 JB |
1003 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
1004 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
8de15d69 RS |
1005 | } |
1006 | ||
e17f7533 | 1007 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 RS |
1008 | |
1009 | init_callproc () | |
1010 | { | |
1011 | char *data_dir = egetenv ("EMACSDATA"); | |
1012 | ||
1013 | register char * sh; | |
1014 | Lisp_Object tempdir; | |
1015 | ||
05630743 | 1016 | if (initialized && !NILP (Vinstallation_directory)) |
8de15d69 | 1017 | { |
05630743 RS |
1018 | /* Add to the path the lib-src subdir of the installation dir. */ |
1019 | Lisp_Object tem; | |
1020 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1021 | Vinstallation_directory); | |
1022 | if (NILP (Fmember (tem, Vexec_path))) | |
8de15d69 | 1023 | { |
bad95d8f | 1024 | #ifndef DOS_NT |
1a6640ec | 1025 | /* MSDOS uses wrapped binaries, so don't do this. */ |
8de15d69 RS |
1026 | Vexec_path = nconc2 (Vexec_path, Fcons (tem, Qnil)); |
1027 | Vexec_directory = Ffile_name_as_directory (tem); | |
bad95d8f | 1028 | #endif /* not DOS_NT */ |
e17f7533 | 1029 | } |
8de15d69 | 1030 | |
e17f7533 RS |
1031 | /* Maybe use ../etc as well as ../lib-src. */ |
1032 | if (data_dir == 0) | |
1033 | { | |
1034 | tem = Fexpand_file_name (build_string ("etc"), | |
1035 | Vinstallation_directory); | |
1036 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1037 | } |
1038 | } | |
7e933683 RS |
1039 | |
1040 | /* Look for the files that should be in etc. We don't use | |
1041 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1042 | near the executable, and they are never in the build |
7e933683 RS |
1043 | directory when that's different from the source directory. |
1044 | ||
1045 | Instead, if these files are not in the nominal place, we try the | |
1046 | source directory. */ | |
1047 | if (data_dir == 0) | |
1048 | { | |
1049 | Lisp_Object tem, tem1, newdir; | |
1050 | ||
1051 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); | |
1052 | tem1 = Ffile_exists_p (tem); | |
1053 | if (NILP (tem1)) | |
1054 | { | |
1055 | newdir = Fexpand_file_name (build_string ("../etc/"), | |
1056 | build_string (PATH_DUMPLOADSEARCH)); | |
1057 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1058 | tem1 = Ffile_exists_p (tem); | |
1059 | if (!NILP (tem1)) | |
1060 | Vdata_directory = newdir; | |
1061 | } | |
1062 | } | |
80856e74 | 1063 | |
e576cab4 JB |
1064 | tempdir = Fdirectory_file_name (Vexec_directory); |
1065 | if (access (XSTRING (tempdir)->data, 0) < 0) | |
80856e74 | 1066 | { |
0af6a831 RS |
1067 | fprintf (stderr, |
1068 | "Warning: arch-dependent data dir (%s) does not exist.\n", | |
1069 | XSTRING (Vexec_directory)->data); | |
80856e74 JB |
1070 | sleep (2); |
1071 | } | |
1072 | ||
e576cab4 JB |
1073 | tempdir = Fdirectory_file_name (Vdata_directory); |
1074 | if (access (XSTRING (tempdir)->data, 0) < 0) | |
1075 | { | |
0af6a831 RS |
1076 | fprintf (stderr, |
1077 | "Warning: arch-independent data dir (%s) does not exist.\n", | |
1078 | XSTRING (Vdata_directory)->data); | |
e576cab4 JB |
1079 | sleep (2); |
1080 | } | |
1081 | ||
80856e74 JB |
1082 | #ifdef VMS |
1083 | Vshell_file_name = build_string ("*dcl*"); | |
1084 | #else | |
e576cab4 | 1085 | sh = (char *) getenv ("SHELL"); |
80856e74 JB |
1086 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
1087 | #endif | |
9fefd2ba JB |
1088 | } |
1089 | ||
1090 | set_process_environment () | |
1091 | { | |
1092 | register char **envp; | |
80856e74 | 1093 | |
80856e74 JB |
1094 | Vprocess_environment = Qnil; |
1095 | #ifndef CANNOT_DUMP | |
1096 | if (initialized) | |
1097 | #endif | |
1098 | for (envp = environ; *envp; envp++) | |
1099 | Vprocess_environment = Fcons (build_string (*envp), | |
1100 | Vprocess_environment); | |
80856e74 JB |
1101 | } |
1102 | ||
1103 | syms_of_callproc () | |
1104 | { | |
bad95d8f | 1105 | #ifdef DOS_NT |
093650fe RS |
1106 | Qbuffer_file_type = intern ("buffer-file-type"); |
1107 | staticpro (&Qbuffer_file_type); | |
1108 | ||
1109 | DEFVAR_LISP ("binary-process-input", &Vbinary_process_input, | |
1110 | "*If non-nil then new subprocesses are assumed to take binary input."); | |
1111 | Vbinary_process_input = Qnil; | |
1112 | ||
1113 | DEFVAR_LISP ("binary-process-output", &Vbinary_process_output, | |
7e6c2178 | 1114 | "*If non-nil then new subprocesses are assumed to produce binary output."); |
093650fe | 1115 | Vbinary_process_output = Qnil; |
bad95d8f | 1116 | #endif /* DOS_NT */ |
7e6c2178 | 1117 | |
80856e74 JB |
1118 | DEFVAR_LISP ("shell-file-name", &Vshell_file_name, |
1119 | "*File name to load inferior shells from.\n\ | |
1120 | Initialized from the SHELL environment variable."); | |
1121 | ||
1122 | DEFVAR_LISP ("exec-path", &Vexec_path, | |
1123 | "*List of directories to search programs to run in subprocesses.\n\ | |
1124 | Each element is a string (directory name) or nil (try default directory)."); | |
1125 | ||
1126 | DEFVAR_LISP ("exec-directory", &Vexec_directory, | |
e576cab4 JB |
1127 | "Directory of architecture-dependent files that come with GNU Emacs,\n\ |
1128 | especially executable programs intended for Emacs to invoke."); | |
1129 | ||
1130 | DEFVAR_LISP ("data-directory", &Vdata_directory, | |
1131 | "Directory of architecture-independent files that come with GNU Emacs,\n\ | |
1132 | intended for Emacs to use."); | |
80856e74 | 1133 | |
35a2f4b8 KH |
1134 | DEFVAR_LISP ("doc-directory", &Vdoc_directory, |
1135 | "Directory containing the DOC file that comes with GNU Emacs.\n\ | |
1136 | This is usually the same as data-directory."); | |
1137 | ||
ed61592a JB |
1138 | DEFVAR_LISP ("configure-info-directory", &Vconfigure_info_directory, |
1139 | "For internal use by the build procedure only.\n\ | |
1140 | This is the name of the directory in which the build procedure installed\n\ | |
1141 | Emacs's info files; the default value for Info-default-directory-list\n\ | |
1142 | includes this."); | |
1143 | Vconfigure_info_directory = build_string (PATH_INFO); | |
1144 | ||
80856e74 | 1145 | DEFVAR_LISP ("process-environment", &Vprocess_environment, |
e576cab4 JB |
1146 | "List of environment variables for subprocesses to inherit.\n\ |
1147 | Each element should be a string of the form ENVVARNAME=VALUE.\n\ | |
1148 | The environment which Emacs inherits is placed in this variable\n\ | |
1149 | when Emacs starts."); | |
80856e74 JB |
1150 | |
1151 | #ifndef VMS | |
1152 | defsubr (&Scall_process); | |
012c6fcb | 1153 | defsubr (&Sgetenv); |
986ffb24 | 1154 | #endif |
e576cab4 | 1155 | defsubr (&Scall_process_region); |
80856e74 | 1156 | } |