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 */ |
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" | |
32d08644 | 73 | #include "charset.h" |
edf496dd | 74 | #include "ccl.h" |
32d08644 | 75 | #include "coding.h" |
57bda87a | 76 | #include <epaths.h> |
80856e74 | 77 | #include "process.h" |
d177f194 | 78 | #include "syssignal.h" |
a129418f | 79 | #include "systty.h" |
80856e74 | 80 | |
5f027cea EZ |
81 | #ifdef MSDOS |
82 | #include "msdos.h" | |
83 | #endif | |
84 | ||
80856e74 JB |
85 | #ifdef VMS |
86 | extern noshare char **environ; | |
87 | #else | |
88 | extern char **environ; | |
89 | #endif | |
90 | ||
91 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
92 | ||
35a2f4b8 | 93 | Lisp_Object Vexec_path, Vexec_directory, Vdata_directory, Vdoc_directory; |
ed61592a | 94 | Lisp_Object Vconfigure_info_directory; |
8abd035b | 95 | Lisp_Object Vtemp_file_name_pattern; |
80856e74 JB |
96 | |
97 | Lisp_Object Vshell_file_name; | |
98 | ||
80856e74 | 99 | Lisp_Object Vprocess_environment; |
80856e74 | 100 | |
bad95d8f | 101 | #ifdef DOS_NT |
093650fe | 102 | Lisp_Object Qbuffer_file_type; |
bad95d8f | 103 | #endif /* DOS_NT */ |
093650fe | 104 | |
80856e74 JB |
105 | /* True iff we are about to fork off a synchronous process or if we |
106 | are waiting for it. */ | |
107 | int synch_process_alive; | |
108 | ||
109 | /* Nonzero => this is a string explaining death of synchronous subprocess. */ | |
110 | char *synch_process_death; | |
111 | ||
112 | /* If synch_process_death is zero, | |
113 | this is exit code of synchronous subprocess. */ | |
114 | int synch_process_retcode; | |
8de15d69 RS |
115 | |
116 | extern Lisp_Object Vdoc_file_name; | |
89e1ec1d | 117 | |
8d024345 | 118 | extern Lisp_Object Vfile_name_coding_system, Vdefault_file_name_coding_system; |
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\ | |
edf496dd | 180 | The remaining arguments are optional.\n\ |
80856e74 JB |
181 | The program's input comes from file INFILE (nil means `/dev/null').\n\ |
182 | Insert output in BUFFER before point; t means current buffer;\n\ | |
183 | nil for BUFFER means discard it; 0 means discard and don't wait.\n\ | |
39eaa782 RS |
184 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,\n\ |
185 | REAL-BUFFER says what to do with standard output, as above,\n\ | |
186 | while STDERR-FILE says what to do with standard error in the child.\n\ | |
187 | STDERR-FILE may be nil (discard standard error output),\n\ | |
188 | t (mix it with ordinary output), or a file name string.\n\ | |
189 | \n\ | |
80856e74 JB |
190 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.\n\ |
191 | Remaining arguments are strings passed as command arguments to PROGRAM.\n\ | |
39eaa782 RS |
192 | \n\ |
193 | If BUFFER is 0, `call-process' returns immediately with value nil.\n\ | |
194 | Otherwise it waits for PROGRAM to terminate\n\ | |
e576cab4 | 195 | and returns a numeric exit status or a signal description string.\n\ |
d177f194 | 196 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.") |
80856e74 JB |
197 | (nargs, args) |
198 | int nargs; | |
199 | register Lisp_Object *args; | |
200 | { | |
58616e67 | 201 | Lisp_Object infile, buffer, current_dir, display, path; |
80856e74 JB |
202 | int fd[2]; |
203 | int filefd; | |
204 | register int pid; | |
6e3bfbb2 RS |
205 | char buf[16384]; |
206 | char *bufptr = buf; | |
207 | int bufsize = 16384; | |
80856e74 | 208 | int count = specpdl_ptr - specpdl; |
2d607244 | 209 | |
80856e74 JB |
210 | register unsigned char **new_argv |
211 | = (unsigned char **) alloca ((max (2, nargs - 2)) * sizeof (char *)); | |
212 | struct buffer *old = current_buffer; | |
39eaa782 RS |
213 | /* File to use for stderr in the child. |
214 | t means use same as standard output. */ | |
215 | Lisp_Object error_file; | |
7e6c2178 RS |
216 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
217 | char *outf, *tempfile; | |
218 | int outfilefd; | |
219 | #endif | |
80856e74 JB |
220 | #if 0 |
221 | int mask; | |
222 | #endif | |
32d08644 KH |
223 | struct coding_system process_coding; /* coding-system of process output */ |
224 | struct coding_system argument_coding; /* coding-system of arguments */ | |
225 | ||
80856e74 JB |
226 | CHECK_STRING (args[0], 0); |
227 | ||
39eaa782 RS |
228 | error_file = Qt; |
229 | ||
7e6c2178 RS |
230 | #ifndef subprocesses |
231 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
3ffde7d6 | 232 | if (nargs >= 3 |
09ffb8b5 | 233 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
234 | error ("Operating system cannot handle asynchronous subprocesses"); |
235 | #endif /* subprocesses */ | |
236 | ||
32d08644 KH |
237 | /* Decide the coding-system for giving arguments and reading process |
238 | output. */ | |
239 | { | |
240 | Lisp_Object val, *args2; | |
08ee4e87 | 241 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
32d08644 KH |
242 | Lisp_Object coding_systems = Qt; |
243 | int i; | |
244 | ||
245 | /* If arguments are supplied, we may have to encode them. */ | |
246 | if (nargs >= 5) | |
247 | { | |
30d57b8e RS |
248 | int must_encode = 0; |
249 | ||
e7c1c20e RS |
250 | for (i = 4; i < nargs; i++) |
251 | CHECK_STRING (args[i], i); | |
252 | ||
a2286b5c | 253 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
254 | if (STRING_MULTIBYTE (args[i])) |
255 | must_encode = 1; | |
256 | ||
beacaab3 KH |
257 | if (!NILP (Vcoding_system_for_write)) |
258 | val = Vcoding_system_for_write; | |
30d57b8e | 259 | else if (! must_encode) |
beacaab3 KH |
260 | val = Qnil; |
261 | else | |
32d08644 KH |
262 | { |
263 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); | |
264 | args2[0] = Qcall_process; | |
265 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 266 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
776b95cb KH |
267 | if (CONSP (coding_systems)) |
268 | val = XCONS (coding_systems)->cdr; | |
269 | else if (CONSP (Vdefault_process_coding_system)) | |
270 | val = XCONS (Vdefault_process_coding_system)->cdr; | |
beacaab3 KH |
271 | else |
272 | val = Qnil; | |
32d08644 KH |
273 | } |
274 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); | |
275 | } | |
276 | ||
277 | /* If BUFFER is nil, we must read process output once and then | |
278 | discard it, so setup coding system but with nil. If BUFFER is | |
279 | an integer, we can discard it without reading. */ | |
3ffde7d6 RS |
280 | if (nargs < 3 || NILP (args[2]) |
281 | || (CONSP (args[2]) && NILP (XCAR (args[2])))) | |
32d08644 | 282 | setup_coding_system (Qnil, &process_coding); |
3ffde7d6 | 283 | else if (!INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2])) |
32d08644 | 284 | { |
beacaab3 KH |
285 | val = Qnil; |
286 | if (!NILP (Vcoding_system_for_read)) | |
287 | val = Vcoding_system_for_read; | |
288 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
321fecde | 289 | val = Qraw_text; |
beacaab3 | 290 | else |
32d08644 | 291 | { |
4724eab4 | 292 | if (EQ (coding_systems, Qt)) |
32d08644 KH |
293 | { |
294 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); | |
295 | args2[0] = Qcall_process; | |
296 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 KH |
297 | coding_systems |
298 | = Ffind_operation_coding_system (nargs + 1, args2); | |
32d08644 | 299 | } |
776b95cb KH |
300 | if (CONSP (coding_systems)) |
301 | val = XCONS (coding_systems)->car; | |
302 | else if (CONSP (Vdefault_process_coding_system)) | |
303 | val = XCONS (Vdefault_process_coding_system)->car; | |
beacaab3 KH |
304 | else |
305 | val = Qnil; | |
32d08644 KH |
306 | } |
307 | setup_coding_system (Fcheck_coding_system (val), &process_coding); | |
308 | } | |
309 | } | |
310 | ||
e576cab4 JB |
311 | if (nargs >= 2 && ! NILP (args[1])) |
312 | { | |
313 | infile = Fexpand_file_name (args[1], current_buffer->directory); | |
314 | CHECK_STRING (infile, 1); | |
315 | } | |
80856e74 | 316 | else |
5437e9f9 | 317 | infile = build_string (NULL_DEVICE); |
80856e74 | 318 | |
e576cab4 JB |
319 | if (nargs >= 3) |
320 | { | |
39eaa782 RS |
321 | buffer = args[2]; |
322 | ||
323 | /* If BUFFER is a list, its meaning is | |
324 | (BUFFER-FOR-STDOUT FILE-FOR-STDERR). */ | |
325 | if (CONSP (buffer)) | |
326 | { | |
327 | if (CONSP (XCONS (buffer)->cdr)) | |
45be8a1e | 328 | { |
a9d4f28a | 329 | Lisp_Object stderr_file; |
45be8a1e RS |
330 | stderr_file = XCONS (XCONS (buffer)->cdr)->car; |
331 | ||
332 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
333 | error_file = stderr_file; | |
334 | else | |
335 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
336 | } | |
337 | ||
39eaa782 RS |
338 | buffer = XCONS (buffer)->car; |
339 | } | |
044512ed | 340 | |
39eaa782 RS |
341 | if (!(EQ (buffer, Qnil) |
342 | || EQ (buffer, Qt) | |
3ffde7d6 | 343 | || INTEGERP (buffer))) |
e576cab4 | 344 | { |
39eaa782 RS |
345 | Lisp_Object spec_buffer; |
346 | spec_buffer = buffer; | |
50fe359b | 347 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
348 | /* Mention the buffer name for a better error message. */ |
349 | if (NILP (buffer)) | |
350 | CHECK_BUFFER (spec_buffer, 2); | |
e576cab4 JB |
351 | CHECK_BUFFER (buffer, 2); |
352 | } | |
353 | } | |
354 | else | |
355 | buffer = Qnil; | |
80856e74 | 356 | |
58616e67 JB |
357 | /* Make sure that the child will be able to chdir to the current |
358 | buffer's current directory, or its unhandled equivalent. We | |
359 | can't just have the child check for an error when it does the | |
360 | chdir, since it's in a vfork. | |
361 | ||
362 | We have to GCPRO around this because Fexpand_file_name, | |
363 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
364 | might call a file name handling function. The argument list is | |
365 | protected by the caller, so all we really have to worry about is | |
366 | buffer. */ | |
367 | { | |
368 | struct gcpro gcpro1, gcpro2, gcpro3; | |
369 | ||
370 | current_dir = current_buffer->directory; | |
371 | ||
372 | GCPRO3 (infile, buffer, current_dir); | |
373 | ||
c52b0b34 KH |
374 | current_dir |
375 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), | |
376 | Qnil); | |
58616e67 JB |
377 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
378 | report_file_error ("Setting current directory", | |
379 | Fcons (current_buffer->directory, Qnil)); | |
380 | ||
381 | UNGCPRO; | |
382 | } | |
383 | ||
e576cab4 | 384 | display = nargs >= 4 ? args[3] : Qnil; |
80856e74 | 385 | |
e576cab4 | 386 | filefd = open (XSTRING (infile)->data, O_RDONLY, 0); |
80856e74 JB |
387 | if (filefd < 0) |
388 | { | |
e576cab4 | 389 | report_file_error ("Opening process input file", Fcons (infile, Qnil)); |
80856e74 JB |
390 | } |
391 | /* Search for program; barf if not found. */ | |
c52b0b34 KH |
392 | { |
393 | struct gcpro gcpro1; | |
394 | ||
395 | GCPRO1 (current_dir); | |
396 | openp (Vexec_path, args[0], EXEC_SUFFIXES, &path, 1); | |
397 | UNGCPRO; | |
398 | } | |
012c6fcb | 399 | if (NILP (path)) |
80856e74 JB |
400 | { |
401 | close (filefd); | |
402 | report_file_error ("Searching for program", Fcons (args[0], Qnil)); | |
403 | } | |
404 | new_argv[0] = XSTRING (path)->data; | |
c364e618 KH |
405 | if (nargs > 4) |
406 | { | |
407 | register int i; | |
408 | ||
c364e618 KH |
409 | if (! CODING_REQUIRE_ENCODING (&argument_coding)) |
410 | { | |
411 | for (i = 4; i < nargs; i++) | |
412 | new_argv[i - 3] = XSTRING (args[i])->data; | |
413 | } | |
414 | else | |
415 | { | |
416 | /* We must encode the arguments. */ | |
417 | struct gcpro gcpro1, gcpro2, gcpro3; | |
418 | ||
419 | GCPRO3 (infile, buffer, current_dir); | |
420 | for (i = 4; i < nargs; i++) | |
421 | { | |
422 | int size = encoding_buffer_size (&argument_coding, | |
fc932ac6 | 423 | STRING_BYTES (XSTRING (args[i]))); |
c364e618 | 424 | unsigned char *dummy1 = (unsigned char *) alloca (size); |
321fecde | 425 | int dummy; |
c364e618 KH |
426 | |
427 | /* The Irix 4.0 compiler barfs if we eliminate dummy. */ | |
428 | new_argv[i - 3] = dummy1; | |
edf496dd | 429 | argument_coding.mode |= CODING_MODE_LAST_BLOCK; |
321fecde KH |
430 | encode_coding (&argument_coding, |
431 | XSTRING (args[i])->data, | |
432 | new_argv[i - 3], | |
fc932ac6 | 433 | STRING_BYTES (XSTRING (args[i])), |
321fecde KH |
434 | size); |
435 | new_argv[i - 3][argument_coding.produced] = 0; | |
edf496dd KH |
436 | /* We have to initialize CCL program status again. */ |
437 | if (argument_coding.type == coding_type_ccl) | |
438 | setup_ccl_program (&(argument_coding.spec.ccl.encoder), Qnil); | |
c364e618 KH |
439 | } |
440 | UNGCPRO; | |
441 | } | |
db54baaa | 442 | new_argv[nargs - 3] = 0; |
c364e618 | 443 | } |
db54baaa KH |
444 | else |
445 | new_argv[1] = 0; | |
80856e74 | 446 | |
7e6c2178 | 447 | #ifdef MSDOS /* MW, July 1993 */ |
8a52365c | 448 | if ((outf = egetenv ("TMPDIR"))) |
7e6c2178 RS |
449 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); |
450 | else | |
451 | { | |
452 | tempfile = alloca (20); | |
453 | *tempfile = '\0'; | |
454 | } | |
455 | dostounix_filename (tempfile); | |
456 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') | |
457 | strcat (tempfile, "/"); | |
458 | strcat (tempfile, "detmp.XXX"); | |
459 | mktemp (tempfile); | |
460 | ||
461 | outfilefd = creat (tempfile, S_IREAD | S_IWRITE); | |
462 | if (outfilefd < 0) | |
463 | { | |
464 | close (filefd); | |
6f89d28a MB |
465 | report_file_error ("Opening process output file", |
466 | Fcons (build_string (tempfile), Qnil)); | |
7e6c2178 | 467 | } |
6f89d28a | 468 | fd[0] = filefd; |
2610078a | 469 | fd[1] = outfilefd; |
6f89d28a | 470 | #endif /* MSDOS */ |
7e6c2178 | 471 | |
d50d3dc8 | 472 | if (INTEGERP (buffer)) |
5437e9f9 | 473 | fd[1] = open (NULL_DEVICE, O_WRONLY), fd[0] = -1; |
80856e74 JB |
474 | else |
475 | { | |
7e6c2178 | 476 | #ifndef MSDOS |
80856e74 | 477 | pipe (fd); |
7e6c2178 | 478 | #endif |
80856e74 JB |
479 | #if 0 |
480 | /* Replaced by close_process_descs */ | |
481 | set_exclusive_use (fd[0]); | |
482 | #endif | |
483 | } | |
484 | ||
485 | { | |
486 | /* child_setup must clobber environ in systems with true vfork. | |
487 | Protect it from permanent change. */ | |
488 | register char **save_environ = environ; | |
489 | register int fd1 = fd[1]; | |
39eaa782 | 490 | int fd_error = fd1; |
80856e74 JB |
491 | |
492 | #if 0 /* Some systems don't have sigblock. */ | |
e065a56e | 493 | mask = sigblock (sigmask (SIGCHLD)); |
80856e74 JB |
494 | #endif |
495 | ||
496 | /* Record that we're about to create a synchronous process. */ | |
497 | synch_process_alive = 1; | |
498 | ||
5c03767e RS |
499 | /* These vars record information from process termination. |
500 | Clear them now before process can possibly terminate, | |
501 | to avoid timing error if process terminates soon. */ | |
502 | synch_process_death = 0; | |
503 | synch_process_retcode = 0; | |
504 | ||
39eaa782 RS |
505 | if (NILP (error_file)) |
506 | fd_error = open (NULL_DEVICE, O_WRONLY); | |
507 | else if (STRINGP (error_file)) | |
508 | { | |
509 | #ifdef DOS_NT | |
510 | fd_error = open (XSTRING (error_file)->data, | |
511 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, | |
512 | S_IREAD | S_IWRITE); | |
513 | #else /* not DOS_NT */ | |
514 | fd_error = creat (XSTRING (error_file)->data, 0666); | |
515 | #endif /* not DOS_NT */ | |
516 | } | |
517 | ||
518 | if (fd_error < 0) | |
519 | { | |
520 | close (filefd); | |
6f89d28a MB |
521 | if (fd[0] != filefd) |
522 | close (fd[0]); | |
39eaa782 RS |
523 | if (fd1 >= 0) |
524 | close (fd1); | |
6f89d28a MB |
525 | #ifdef MSDOS |
526 | unlink (tempfile); | |
527 | #endif | |
528 | report_file_error ("Cannot redirect stderr", | |
529 | Fcons ((NILP (error_file) | |
530 | ? build_string (NULL_DEVICE) : error_file), | |
531 | Qnil)); | |
39eaa782 | 532 | } |
89e1ec1d | 533 | |
8d024345 | 534 | current_dir = ENCODE_FILE (current_dir); |
89e1ec1d | 535 | |
2610078a | 536 | #ifdef MSDOS /* MW, July 1993 */ |
c17c4250 | 537 | /* Note that on MSDOS `child_setup' actually returns the child process |
2610078a KH |
538 | exit status, not its PID, so we assign it to `synch_process_retcode' |
539 | below. */ | |
c17c4250 EZ |
540 | pid = child_setup (filefd, outfilefd, fd_error, (char **) new_argv, |
541 | 0, current_dir); | |
39eaa782 | 542 | |
2610078a KH |
543 | /* Record that the synchronous process exited and note its |
544 | termination status. */ | |
545 | synch_process_alive = 0; | |
546 | synch_process_retcode = pid; | |
547 | if (synch_process_retcode < 0) /* means it couldn't be exec'ed */ | |
759ae811 | 548 | synch_process_death = strerror (errno); |
2610078a KH |
549 | |
550 | close (outfilefd); | |
551 | if (fd_error != outfilefd) | |
552 | close (fd_error); | |
553 | fd1 = -1; /* No harm in closing that one! */ | |
32d08644 KH |
554 | /* Since CRLF is converted to LF within `decode_coding', we can |
555 | always open a file with binary mode. */ | |
556 | fd[0] = open (tempfile, O_BINARY); | |
2610078a KH |
557 | if (fd[0] < 0) |
558 | { | |
559 | unlink (tempfile); | |
560 | close (filefd); | |
561 | report_file_error ("Cannot re-open temporary file", Qnil); | |
562 | } | |
563 | #else /* not MSDOS */ | |
bad95d8f | 564 | #ifdef WINDOWSNT |
2d607244 RS |
565 | pid = child_setup (filefd, fd1, fd_error, (char **) new_argv, |
566 | 0, current_dir); | |
bad95d8f | 567 | #else /* not WINDOWSNT */ |
80856e74 JB |
568 | pid = vfork (); |
569 | ||
570 | if (pid == 0) | |
571 | { | |
572 | if (fd[0] >= 0) | |
573 | close (fd[0]); | |
1e7963c7 RS |
574 | #ifdef HAVE_SETSID |
575 | setsid (); | |
576 | #endif | |
577 | #if defined (USG) && !defined (BSD_PGRPS) | |
80856e74 JB |
578 | setpgrp (); |
579 | #else | |
580 | setpgrp (pid, pid); | |
581 | #endif /* USG */ | |
2d607244 RS |
582 | child_setup (filefd, fd1, fd_error, (char **) new_argv, |
583 | 0, current_dir); | |
80856e74 | 584 | } |
bad95d8f | 585 | #endif /* not WINDOWSNT */ |
cd5f8f60 RS |
586 | |
587 | /* The MSDOS case did this already. */ | |
588 | if (fd_error >= 0) | |
589 | close (fd_error); | |
2610078a | 590 | #endif /* not MSDOS */ |
80856e74 | 591 | |
80856e74 JB |
592 | environ = save_environ; |
593 | ||
6b6e798b RS |
594 | /* Close most of our fd's, but not fd[0] |
595 | since we will use that to read input from. */ | |
80856e74 | 596 | close (filefd); |
799abb26 | 597 | if (fd1 >= 0 && fd1 != fd_error) |
7e6c2178 | 598 | close (fd1); |
80856e74 JB |
599 | } |
600 | ||
601 | if (pid < 0) | |
602 | { | |
6b6e798b RS |
603 | if (fd[0] >= 0) |
604 | close (fd[0]); | |
80856e74 JB |
605 | report_file_error ("Doing vfork", Qnil); |
606 | } | |
607 | ||
d50d3dc8 | 608 | if (INTEGERP (buffer)) |
80856e74 | 609 | { |
6b6e798b RS |
610 | if (fd[0] >= 0) |
611 | close (fd[0]); | |
80856e74 | 612 | #ifndef subprocesses |
e576cab4 JB |
613 | /* If Emacs has been built with asynchronous subprocess support, |
614 | we don't need to do this, I think because it will then have | |
615 | the facilities for handling SIGCHLD. */ | |
80856e74 JB |
616 | wait_without_blocking (); |
617 | #endif /* subprocesses */ | |
80856e74 JB |
618 | return Qnil; |
619 | } | |
620 | ||
6b6e798b | 621 | /* Enable sending signal if user quits below. */ |
37d54121 RS |
622 | call_process_exited = 0; |
623 | ||
7e6c2178 RS |
624 | #ifdef MSDOS |
625 | /* MSDOS needs different cleanup information. */ | |
626 | record_unwind_protect (call_process_cleanup, | |
627 | Fcons (make_number (fd[0]), build_string (tempfile))); | |
628 | #else | |
80856e74 JB |
629 | record_unwind_protect (call_process_cleanup, |
630 | Fcons (make_number (fd[0]), make_number (pid))); | |
7e6c2178 | 631 | #endif /* not MSDOS */ |
80856e74 JB |
632 | |
633 | ||
d50d3dc8 | 634 | if (BUFFERP (buffer)) |
80856e74 JB |
635 | Fset_buffer (buffer); |
636 | ||
637 | immediate_quit = 1; | |
638 | QUIT; | |
639 | ||
640 | { | |
641 | register int nread; | |
0ad477db | 642 | int first = 1; |
6e3bfbb2 | 643 | int total_read = 0; |
321fecde | 644 | int carryover = 0; |
7a7ab107 | 645 | int display_on_the_fly = !NILP (display) && INTERACTIVE; |
05b44e90 KH |
646 | struct coding_system saved_coding; |
647 | ||
648 | saved_coding = process_coding; | |
80856e74 | 649 | |
60558b19 | 650 | while (1) |
80856e74 | 651 | { |
60558b19 RS |
652 | /* Repeatedly read until we've filled as much as possible |
653 | of the buffer size we have. But don't read | |
8e6208c5 | 654 | less than 1024--save that for the next bufferful. */ |
321fecde | 655 | nread = carryover; |
60558b19 | 656 | while (nread < bufsize - 1024) |
00fb3e95 | 657 | { |
321fecde | 658 | int this_read = read (fd[0], bufptr + nread, bufsize - nread); |
60558b19 RS |
659 | |
660 | if (this_read < 0) | |
661 | goto give_up; | |
662 | ||
663 | if (this_read == 0) | |
7a7ab107 KH |
664 | { |
665 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
666 | break; | |
667 | } | |
60558b19 RS |
668 | |
669 | nread += this_read; | |
7a7ab107 | 670 | total_read += this_read; |
60558b19 | 671 | |
7a7ab107 KH |
672 | if (display_on_the_fly) |
673 | break; | |
674 | } | |
60558b19 RS |
675 | |
676 | /* Now NREAD is the total amount of data in the buffer. */ | |
80856e74 | 677 | immediate_quit = 0; |
6e3bfbb2 | 678 | |
012c6fcb | 679 | if (!NILP (buffer)) |
32d08644 KH |
680 | { |
681 | if (process_coding.type == coding_type_no_conversion) | |
682 | insert (bufptr, nread); | |
683 | else | |
684 | { /* We have to decode the input. */ | |
321fecde | 685 | int size = decoding_buffer_size (&process_coding, nread); |
a871dd58 | 686 | char *decoding_buf = (char *) xmalloc (size); |
32d08644 | 687 | |
321fecde KH |
688 | decode_coding (&process_coding, bufptr, decoding_buf, |
689 | nread, size); | |
7a7ab107 KH |
690 | if (display_on_the_fly |
691 | && saved_coding.type == coding_type_undecided | |
692 | && process_coding.type != coding_type_undecided) | |
693 | { | |
694 | /* We have detected some coding system. But, | |
695 | there's a possibility that the detection was | |
696 | done by insufficient data. So, we give up | |
697 | displaying on the fly. */ | |
a871dd58 | 698 | xfree (decoding_buf); |
7a7ab107 KH |
699 | display_on_the_fly = 0; |
700 | process_coding = saved_coding; | |
701 | carryover = nread; | |
702 | continue; | |
703 | } | |
321fecde KH |
704 | if (process_coding.produced > 0) |
705 | insert (decoding_buf, process_coding.produced); | |
a871dd58 | 706 | xfree (decoding_buf); |
11218c68 | 707 | carryover = nread - process_coding.consumed; |
321fecde KH |
708 | if (carryover > 0) |
709 | { | |
710 | /* As CARRYOVER should not be that large, we had | |
711 | better avoid overhead of bcopy. */ | |
712 | char *p = bufptr + process_coding.consumed; | |
713 | char *pend = p + carryover; | |
714 | char *dst = bufptr; | |
715 | ||
716 | while (p < pend) *dst++ = *p++; | |
717 | } | |
32d08644 KH |
718 | } |
719 | } | |
321fecde KH |
720 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
721 | { | |
722 | if (carryover > 0) | |
723 | insert (bufptr, carryover); | |
724 | break; | |
725 | } | |
6e3bfbb2 RS |
726 | |
727 | /* Make the buffer bigger as we continue to read more data, | |
728 | but not past 64k. */ | |
729 | if (bufsize < 64 * 1024 && total_read > 32 * bufsize) | |
730 | { | |
731 | bufsize *= 2; | |
732 | bufptr = (char *) alloca (bufsize); | |
733 | } | |
734 | ||
012c6fcb | 735 | if (!NILP (display) && INTERACTIVE) |
0ad477db RS |
736 | { |
737 | if (first) | |
738 | prepare_menu_bars (); | |
739 | first = 0; | |
740 | redisplay_preserve_echo_area (); | |
741 | } | |
80856e74 JB |
742 | immediate_quit = 1; |
743 | QUIT; | |
744 | } | |
60558b19 | 745 | give_up: ; |
80856e74 | 746 | |
bbd29cfe KH |
747 | Vlast_coding_system_used = process_coding.symbol; |
748 | ||
3b440bb5 EZ |
749 | /* If the caller required, let the buffer inherit the |
750 | coding-system used to decode the process output. */ | |
751 | if (inherit_process_coding_system) | |
752 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
753 | make_number (total_read)); | |
754 | } | |
755 | ||
80856e74 JB |
756 | /* Wait for it to terminate, unless it already has. */ |
757 | wait_for_termination (pid); | |
758 | ||
759 | immediate_quit = 0; | |
760 | ||
761 | set_buffer_internal (old); | |
762 | ||
37d54121 RS |
763 | /* Don't kill any children that the subprocess may have left behind |
764 | when exiting. */ | |
765 | call_process_exited = 1; | |
766 | ||
80856e74 JB |
767 | unbind_to (count, Qnil); |
768 | ||
80856e74 JB |
769 | if (synch_process_death) |
770 | return build_string (synch_process_death); | |
771 | return make_number (synch_process_retcode); | |
772 | } | |
773 | #endif | |
774 | \f | |
9fefd2ba | 775 | static Lisp_Object |
80856e74 JB |
776 | delete_temp_file (name) |
777 | Lisp_Object name; | |
778 | { | |
2e3dc201 | 779 | /* Use Fdelete_file (indirectly) because that runs a file name handler. |
59750d69 | 780 | We did that when writing the file, so we should do so when deleting. */ |
2e3dc201 | 781 | internal_delete_file (name); |
80856e74 JB |
782 | } |
783 | ||
784 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
785 | 3, MANY, 0, | |
786 | "Send text from START to END to a synchronous process running PROGRAM.\n\ | |
edf496dd | 787 | The remaining arguments are optional.\n\ |
80856e74 | 788 | Delete the text if fourth arg DELETE is non-nil.\n\ |
39eaa782 | 789 | \n\ |
80856e74 JB |
790 | Insert output in BUFFER before point; t means current buffer;\n\ |
791 | nil for BUFFER means discard it; 0 means discard and don't wait.\n\ | |
39eaa782 RS |
792 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,\n\ |
793 | REAL-BUFFER says what to do with standard output, as above,\n\ | |
794 | while STDERR-FILE says what to do with standard error in the child.\n\ | |
795 | STDERR-FILE may be nil (discard standard error output),\n\ | |
796 | t (mix it with ordinary output), or a file name string.\n\ | |
797 | \n\ | |
80856e74 JB |
798 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.\n\ |
799 | Remaining args are passed to PROGRAM at startup as command args.\n\ | |
39eaa782 RS |
800 | \n\ |
801 | If BUFFER is nil, `call-process-region' returns immediately with value nil.\n\ | |
802 | Otherwise it waits for PROGRAM to terminate\n\ | |
e576cab4 | 803 | and returns a numeric exit status or a signal description string.\n\ |
d177f194 | 804 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.") |
80856e74 JB |
805 | (nargs, args) |
806 | int nargs; | |
807 | register Lisp_Object *args; | |
808 | { | |
39323a7e KH |
809 | struct gcpro gcpro1; |
810 | Lisp_Object filename_string; | |
811 | register Lisp_Object start, end; | |
d3e81d0a | 812 | int count = specpdl_ptr - specpdl; |
08ee4e87 | 813 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
32d08644 KH |
814 | Lisp_Object coding_systems = Qt; |
815 | Lisp_Object val, *args2; | |
816 | int i; | |
bad95d8f | 817 | #ifdef DOS_NT |
7e6c2178 | 818 | char *tempfile; |
7e6c2178 RS |
819 | char *outf = '\0'; |
820 | ||
8a52365c EZ |
821 | if ((outf = egetenv ("TMPDIR")) |
822 | || (outf = egetenv ("TMP")) | |
823 | || (outf = egetenv ("TEMP"))) | |
7e6c2178 RS |
824 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); |
825 | else | |
826 | { | |
827 | tempfile = alloca (20); | |
828 | *tempfile = '\0'; | |
829 | } | |
0774fcf8 | 830 | if (!IS_DIRECTORY_SEP (tempfile[strlen (tempfile) - 1])) |
7e6c2178 | 831 | strcat (tempfile, "/"); |
5711b547 RS |
832 | if ('/' == DIRECTORY_SEP) |
833 | dostounix_filename (tempfile); | |
834 | else | |
835 | unixtodos_filename (tempfile); | |
0774fcf8 RS |
836 | #ifdef WINDOWSNT |
837 | strcat (tempfile, "emXXXXXX"); | |
838 | #else | |
7e6c2178 | 839 | strcat (tempfile, "detmp.XXX"); |
0774fcf8 | 840 | #endif |
bad95d8f | 841 | #else /* not DOS_NT */ |
fc932ac6 | 842 | char *tempfile = (char *) alloca (STRING_BYTES (XSTRING (Vtemp_file_name_pattern)) + 1); |
8abd035b | 843 | bcopy (XSTRING (Vtemp_file_name_pattern)->data, tempfile, |
fc932ac6 | 844 | STRING_BYTES (XSTRING (Vtemp_file_name_pattern)) + 1); |
bad95d8f | 845 | #endif /* not DOS_NT */ |
7e6c2178 | 846 | |
80856e74 JB |
847 | mktemp (tempfile); |
848 | ||
849 | filename_string = build_string (tempfile); | |
39323a7e | 850 | GCPRO1 (filename_string); |
80856e74 JB |
851 | start = args[0]; |
852 | end = args[1]; | |
32d08644 | 853 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
854 | if (!NILP (Vcoding_system_for_write)) |
855 | val = Vcoding_system_for_write; | |
856 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
32d08644 KH |
857 | val = Qnil; |
858 | else | |
beacaab3 | 859 | { |
91489411 RS |
860 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); |
861 | args2[0] = Qcall_process_region; | |
862 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
863 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); | |
864 | if (CONSP (coding_systems)) | |
865 | val = XCONS (coding_systems)->cdr; | |
866 | else if (CONSP (Vdefault_process_coding_system)) | |
867 | val = XCONS (Vdefault_process_coding_system)->cdr; | |
beacaab3 | 868 | else |
91489411 | 869 | val = Qnil; |
beacaab3 | 870 | } |
32d08644 | 871 | |
168afdaa RS |
872 | { |
873 | int count1 = specpdl_ptr - specpdl; | |
874 | ||
875 | specbind (intern ("coding-system-for-write"), val); | |
876 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil); | |
877 | ||
878 | unbind_to (count1, Qnil); | |
879 | } | |
91489411 RS |
880 | |
881 | /* Note that Fcall_process takes care of binding | |
882 | coding-system-for-read. */ | |
093650fe | 883 | |
80856e74 JB |
884 | record_unwind_protect (delete_temp_file, filename_string); |
885 | ||
edf496dd | 886 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
887 | Fdelete_region (start, end); |
888 | ||
edf496dd KH |
889 | if (nargs > 3) |
890 | { | |
891 | args += 2; | |
892 | nargs -= 2; | |
893 | } | |
894 | else | |
895 | { | |
896 | args[0] = args[2]; | |
897 | nargs = 2; | |
898 | } | |
899 | args[1] = filename_string; | |
80856e74 | 900 | |
edf496dd | 901 | RETURN_UNGCPRO (unbind_to (count, Fcall_process (nargs, args))); |
80856e74 JB |
902 | } |
903 | \f | |
904 | #ifndef VMS /* VMS version is in vmsproc.c. */ | |
905 | ||
dfcf069d AS |
906 | static int relocate_fd (); |
907 | ||
80856e74 JB |
908 | /* This is the last thing run in a newly forked inferior |
909 | either synchronous or asynchronous. | |
910 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
911 | Initialize inferior's priority, pgrp, connected dir and environment. | |
912 | then exec another program based on new_argv. | |
913 | ||
914 | This function may change environ for the superior process. | |
915 | Therefore, the superior process must save and restore the value | |
916 | of environ around the vfork and the call to this function. | |
917 | ||
80856e74 | 918 | SET_PGRP is nonzero if we should put the subprocess into a separate |
e576cab4 JB |
919 | process group. |
920 | ||
921 | CURRENT_DIR is an elisp string giving the path of the current | |
922 | directory the subprocess should have. Since we can't really signal | |
923 | a decent error from within the child, this should be verified as an | |
924 | executable directory by the parent. */ | |
80856e74 | 925 | |
dfcf069d | 926 | int |
e576cab4 | 927 | child_setup (in, out, err, new_argv, set_pgrp, current_dir) |
80856e74 JB |
928 | int in, out, err; |
929 | register char **new_argv; | |
80856e74 | 930 | int set_pgrp; |
e576cab4 | 931 | Lisp_Object current_dir; |
80856e74 | 932 | { |
e576cab4 | 933 | char **env; |
7fcf7f05 | 934 | char *pwd_var; |
bad95d8f RS |
935 | #ifdef WINDOWSNT |
936 | int cpid; | |
4252a4bd | 937 | HANDLE handles[3]; |
bad95d8f | 938 | #endif /* WINDOWSNT */ |
e576cab4 | 939 | |
33abe2d9 | 940 | int pid = getpid (); |
80856e74 | 941 | |
68d10241 | 942 | #ifdef SET_EMACS_PRIORITY |
4f0b9d49 JB |
943 | { |
944 | extern int emacs_priority; | |
945 | ||
68d10241 RS |
946 | if (emacs_priority < 0) |
947 | nice (- emacs_priority); | |
4f0b9d49 | 948 | } |
5b633aeb | 949 | #endif |
80856e74 JB |
950 | |
951 | #ifdef subprocesses | |
952 | /* Close Emacs's descriptors that this process should not have. */ | |
953 | close_process_descs (); | |
954 | #endif | |
c17c4250 EZ |
955 | /* DOS_NT isn't in a vfork, so if we are in the middle of load-file, |
956 | we will lose if we call close_load_descs here. */ | |
957 | #ifndef DOS_NT | |
4458cebe | 958 | close_load_descs (); |
c17c4250 | 959 | #endif |
80856e74 JB |
960 | |
961 | /* Note that use of alloca is always safe here. It's obvious for systems | |
962 | that do not have true vfork or that have true (stack) alloca. | |
963 | If using vfork and C_ALLOCA it is safe because that changes | |
964 | the superior's static variables as if the superior had done alloca | |
965 | and will be cleaned up in the usual way. */ | |
e576cab4 | 966 | { |
7fcf7f05 | 967 | register char *temp; |
e576cab4 | 968 | register int i; |
77d78be1 | 969 | |
fc932ac6 | 970 | i = STRING_BYTES (XSTRING (current_dir)); |
7fcf7f05 RS |
971 | pwd_var = (char *) alloca (i + 6); |
972 | temp = pwd_var + 4; | |
973 | bcopy ("PWD=", pwd_var, 4); | |
e576cab4 | 974 | bcopy (XSTRING (current_dir)->data, temp, i); |
bad95d8f | 975 | if (!IS_DIRECTORY_SEP (temp[i - 1])) temp[i++] = DIRECTORY_SEP; |
e576cab4 JB |
976 | temp[i] = 0; |
977 | ||
c17c4250 | 978 | #ifndef DOS_NT |
e576cab4 JB |
979 | /* We can't signal an Elisp error here; we're in a vfork. Since |
980 | the callers check the current directory before forking, this | |
981 | should only return an error if the directory's permissions | |
982 | are changed between the check and this chdir, but we should | |
983 | at least check. */ | |
984 | if (chdir (temp) < 0) | |
20b25e46 | 985 | _exit (errno); |
b4c7684c | 986 | #endif |
7fcf7f05 | 987 | |
c17c4250 EZ |
988 | #ifdef DOS_NT |
989 | /* Get past the drive letter, so that d:/ is left alone. */ | |
990 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
991 | { | |
992 | temp += 2; | |
993 | i -= 2; | |
994 | } | |
995 | #endif | |
996 | ||
7fcf7f05 | 997 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 998 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 999 | temp[--i] = 0; |
e576cab4 | 1000 | } |
80856e74 | 1001 | |
80856e74 JB |
1002 | /* Set `env' to a vector of the strings in Vprocess_environment. */ |
1003 | { | |
1004 | register Lisp_Object tem; | |
1005 | register char **new_env; | |
1006 | register int new_length; | |
1007 | ||
1008 | new_length = 0; | |
1009 | for (tem = Vprocess_environment; | |
d50d3dc8 | 1010 | CONSP (tem) && STRINGP (XCONS (tem)->car); |
80856e74 JB |
1011 | tem = XCONS (tem)->cdr) |
1012 | new_length++; | |
1013 | ||
7fcf7f05 RS |
1014 | /* new_length + 2 to include PWD and terminating 0. */ |
1015 | env = new_env = (char **) alloca ((new_length + 2) * sizeof (char *)); | |
1016 | ||
1017 | /* If we have a PWD envvar, pass one down, | |
1018 | but with corrected value. */ | |
1019 | if (getenv ("PWD")) | |
1020 | *new_env++ = pwd_var; | |
80856e74 | 1021 | |
cd9565ba | 1022 | /* Copy the Vprocess_environment strings into new_env. */ |
80856e74 | 1023 | for (tem = Vprocess_environment; |
d50d3dc8 | 1024 | CONSP (tem) && STRINGP (XCONS (tem)->car); |
80856e74 | 1025 | tem = XCONS (tem)->cdr) |
cd9565ba RS |
1026 | { |
1027 | char **ep = env; | |
1028 | char *string = (char *) XSTRING (XCONS (tem)->car)->data; | |
1029 | /* See if this string duplicates any string already in the env. | |
1030 | If so, don't put it in. | |
1031 | When an env var has multiple definitions, | |
1032 | we keep the definition that comes first in process-environment. */ | |
1033 | for (; ep != new_env; ep++) | |
1034 | { | |
1035 | char *p = *ep, *q = string; | |
1036 | while (1) | |
1037 | { | |
1038 | if (*q == 0) | |
1039 | /* The string is malformed; might as well drop it. */ | |
1040 | goto duplicate; | |
1041 | if (*q != *p) | |
1042 | break; | |
1043 | if (*q == '=') | |
1044 | goto duplicate; | |
1045 | p++, q++; | |
1046 | } | |
1047 | } | |
1048 | *new_env++ = string; | |
1049 | duplicate: ; | |
1050 | } | |
80856e74 JB |
1051 | *new_env = 0; |
1052 | } | |
bad95d8f RS |
1053 | #ifdef WINDOWSNT |
1054 | prepare_standard_handles (in, out, err, handles); | |
b4c7684c | 1055 | set_process_dir (XSTRING (current_dir)->data); |
bad95d8f | 1056 | #else /* not WINDOWSNT */ |
426b37ae JB |
1057 | /* Make sure that in, out, and err are not actually already in |
1058 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1059 | started with its standard in, out, or error closed, as might |
426b37ae | 1060 | happen under X. */ |
f29f9e4a RS |
1061 | { |
1062 | int oin = in, oout = out; | |
1063 | ||
1064 | /* We have to avoid relocating the same descriptor twice! */ | |
1065 | ||
1066 | in = relocate_fd (in, 3); | |
1067 | ||
1068 | if (out == oin) | |
1069 | out = in; | |
1070 | else | |
3e9367e7 | 1071 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1072 | |
1073 | if (err == oin) | |
1074 | err = in; | |
1075 | else if (err == oout) | |
1076 | err = out; | |
1077 | else | |
3e9367e7 | 1078 | err = relocate_fd (err, 3); |
f29f9e4a | 1079 | } |
426b37ae | 1080 | |
c17c4250 | 1081 | #ifndef MSDOS |
80856e74 JB |
1082 | close (0); |
1083 | close (1); | |
1084 | close (2); | |
1085 | ||
1086 | dup2 (in, 0); | |
1087 | dup2 (out, 1); | |
1088 | dup2 (err, 2); | |
1089 | close (in); | |
1090 | close (out); | |
1091 | close (err); | |
c17c4250 | 1092 | #endif /* not MSDOS */ |
bad95d8f | 1093 | #endif /* not WINDOWSNT */ |
80856e74 | 1094 | |
6b2cd868 | 1095 | #if defined(USG) && !defined(BSD_PGRPS) |
fdba8590 | 1096 | #ifndef SETPGRP_RELEASES_CTTY |
e576cab4 | 1097 | setpgrp (); /* No arguments but equivalent in this case */ |
fdba8590 | 1098 | #endif |
e576cab4 JB |
1099 | #else |
1100 | setpgrp (pid, pid); | |
1101 | #endif /* USG */ | |
a129418f RS |
1102 | /* setpgrp_of_tty is incorrect here; it uses input_fd. */ |
1103 | EMACS_SET_TTY_PGRP (0, &pid); | |
80856e74 JB |
1104 | |
1105 | #ifdef vipc | |
1106 | something missing here; | |
1107 | #endif /* vipc */ | |
1108 | ||
c17c4250 EZ |
1109 | #ifdef MSDOS |
1110 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
1111 | if (pid == -1) | |
1112 | /* An error occurred while trying to run the subprocess. */ | |
1113 | report_file_error ("Spawning child process", Qnil); | |
1114 | return pid; | |
1115 | #else /* not MSDOS */ | |
bad95d8f RS |
1116 | #ifdef WINDOWSNT |
1117 | /* Spawn the child. (See ntproc.c:Spawnve). */ | |
1118 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); | |
db77d785 | 1119 | reset_standard_handles (in, out, err, handles); |
ff27bfbe KH |
1120 | if (cpid == -1) |
1121 | /* An error occurred while trying to spawn the process. */ | |
1122 | report_file_error ("Spawning child process", Qnil); | |
bad95d8f RS |
1123 | return cpid; |
1124 | #else /* not WINDOWSNT */ | |
80856e74 JB |
1125 | /* execvp does not accept an environment arg so the only way |
1126 | to pass this environment is to set environ. Our caller | |
1127 | is responsible for restoring the ambient value of environ. */ | |
1128 | environ = env; | |
1129 | execvp (new_argv[0], new_argv); | |
1130 | ||
f040c0ba | 1131 | write (1, "Can't exec program: ", 20); |
80856e74 | 1132 | write (1, new_argv[0], strlen (new_argv[0])); |
d20b8af6 | 1133 | write (1, "\n", 1); |
80856e74 | 1134 | _exit (1); |
bad95d8f | 1135 | #endif /* not WINDOWSNT */ |
7e6c2178 | 1136 | #endif /* not MSDOS */ |
80856e74 JB |
1137 | } |
1138 | ||
a3833dfe | 1139 | /* Move the file descriptor FD so that its number is not less than MINFD. |
426b37ae | 1140 | If the file descriptor is moved at all, the original is freed. */ |
dfcf069d | 1141 | static int |
a3833dfe KH |
1142 | relocate_fd (fd, minfd) |
1143 | int fd, minfd; | |
426b37ae | 1144 | { |
a3833dfe | 1145 | if (fd >= minfd) |
426b37ae JB |
1146 | return fd; |
1147 | else | |
1148 | { | |
1149 | int new = dup (fd); | |
1150 | if (new == -1) | |
1151 | { | |
20c018a0 | 1152 | char *message1 = "Error while setting up child: "; |
826c56ac | 1153 | char *errmessage = strerror (errno); |
20c018a0 JB |
1154 | char *message2 = "\n"; |
1155 | write (2, message1, strlen (message1)); | |
826c56ac | 1156 | write (2, errmessage, strlen (errmessage)); |
20c018a0 | 1157 | write (2, message2, strlen (message2)); |
426b37ae JB |
1158 | _exit (1); |
1159 | } | |
1160 | /* Note that we hold the original FD open while we recurse, | |
1161 | to guarantee we'll get a new FD if we need it. */ | |
a3833dfe | 1162 | new = relocate_fd (new, minfd); |
426b37ae JB |
1163 | close (fd); |
1164 | return new; | |
1165 | } | |
1166 | } | |
1167 | ||
012c6fcb JA |
1168 | static int |
1169 | getenv_internal (var, varlen, value, valuelen) | |
1170 | char *var; | |
1171 | int varlen; | |
1172 | char **value; | |
1173 | int *valuelen; | |
1174 | { | |
1175 | Lisp_Object scan; | |
1176 | ||
1177 | for (scan = Vprocess_environment; CONSP (scan); scan = XCONS (scan)->cdr) | |
1178 | { | |
c1350752 KH |
1179 | Lisp_Object entry; |
1180 | ||
1181 | entry = XCONS (scan)->car; | |
d50d3dc8 | 1182 | if (STRINGP (entry) |
fc932ac6 | 1183 | && STRING_BYTES (XSTRING (entry)) > varlen |
012c6fcb | 1184 | && XSTRING (entry)->data[varlen] == '=' |
bad95d8f RS |
1185 | #ifdef WINDOWSNT |
1186 | /* NT environment variables are case insensitive. */ | |
a9971c6d | 1187 | && ! strnicmp (XSTRING (entry)->data, var, varlen) |
bad95d8f | 1188 | #else /* not WINDOWSNT */ |
a9971c6d | 1189 | && ! bcmp (XSTRING (entry)->data, var, varlen) |
bad95d8f | 1190 | #endif /* not WINDOWSNT */ |
a9971c6d | 1191 | ) |
012c6fcb JA |
1192 | { |
1193 | *value = (char *) XSTRING (entry)->data + (varlen + 1); | |
fc932ac6 | 1194 | *valuelen = STRING_BYTES (XSTRING (entry)) - (varlen + 1); |
012c6fcb JA |
1195 | return 1; |
1196 | } | |
1197 | } | |
1198 | ||
1199 | return 0; | |
1200 | } | |
1201 | ||
0ad477db | 1202 | DEFUN ("getenv", Fgetenv, Sgetenv, 1, 1, 0, |
012c6fcb JA |
1203 | "Return the value of environment variable VAR, as a string.\n\ |
1204 | VAR should be a string. Value is nil if VAR is undefined in the environment.\n\ | |
1205 | This function consults the variable ``process-environment'' for its value.") | |
1206 | (var) | |
1207 | Lisp_Object var; | |
1208 | { | |
1209 | char *value; | |
1210 | int valuelen; | |
1211 | ||
1212 | CHECK_STRING (var, 0); | |
fc932ac6 | 1213 | if (getenv_internal (XSTRING (var)->data, STRING_BYTES (XSTRING (var)), |
012c6fcb JA |
1214 | &value, &valuelen)) |
1215 | return make_string (value, valuelen); | |
1216 | else | |
1217 | return Qnil; | |
1218 | } | |
1219 | ||
1220 | /* A version of getenv that consults process_environment, easily | |
e576cab4 | 1221 | callable from C. */ |
012c6fcb JA |
1222 | char * |
1223 | egetenv (var) | |
e576cab4 | 1224 | char *var; |
012c6fcb JA |
1225 | { |
1226 | char *value; | |
1227 | int valuelen; | |
1228 | ||
1229 | if (getenv_internal (var, strlen (var), &value, &valuelen)) | |
1230 | return value; | |
1231 | else | |
1232 | return 0; | |
1233 | } | |
1234 | ||
80856e74 JB |
1235 | #endif /* not VMS */ |
1236 | \f | |
8de15d69 | 1237 | /* This is run before init_cmdargs. */ |
7e6c2178 | 1238 | |
dfcf069d | 1239 | void |
8de15d69 RS |
1240 | init_callproc_1 () |
1241 | { | |
1242 | char *data_dir = egetenv ("EMACSDATA"); | |
35a2f4b8 KH |
1243 | char *doc_dir = egetenv ("EMACSDOC"); |
1244 | ||
8de15d69 | 1245 | Vdata_directory |
7e6c2178 | 1246 | = Ffile_name_as_directory (build_string (data_dir ? data_dir |
8de15d69 | 1247 | : PATH_DATA)); |
35a2f4b8 KH |
1248 | Vdoc_directory |
1249 | = Ffile_name_as_directory (build_string (doc_dir ? doc_dir | |
1250 | : PATH_DOC)); | |
9453ea7b | 1251 | |
e576cab4 | 1252 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1253 | PATH_EXEC path from epaths.h. */ |
e576cab4 | 1254 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); |
80856e74 JB |
1255 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
1256 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
8de15d69 RS |
1257 | } |
1258 | ||
e17f7533 | 1259 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1260 | |
dfcf069d | 1261 | void |
8de15d69 RS |
1262 | init_callproc () |
1263 | { | |
1264 | char *data_dir = egetenv ("EMACSDATA"); | |
1265 | ||
1266 | register char * sh; | |
1267 | Lisp_Object tempdir; | |
1268 | ||
9cc4fad5 | 1269 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1270 | { |
05630743 RS |
1271 | /* Add to the path the lib-src subdir of the installation dir. */ |
1272 | Lisp_Object tem; | |
1273 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1274 | Vinstallation_directory); | |
bad95d8f | 1275 | #ifndef DOS_NT |
1a6640ec | 1276 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc RS |
1277 | if (NILP (Fmember (tem, Vexec_path))) |
1278 | Vexec_path = nconc2 (Vexec_path, Fcons (tem, Qnil)); | |
1279 | ||
1280 | Vexec_directory = Ffile_name_as_directory (tem); | |
bad95d8f | 1281 | #endif /* not DOS_NT */ |
8de15d69 | 1282 | |
e17f7533 RS |
1283 | /* Maybe use ../etc as well as ../lib-src. */ |
1284 | if (data_dir == 0) | |
1285 | { | |
1286 | tem = Fexpand_file_name (build_string ("etc"), | |
1287 | Vinstallation_directory); | |
1288 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1289 | } |
1290 | } | |
7e933683 RS |
1291 | |
1292 | /* Look for the files that should be in etc. We don't use | |
1293 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1294 | near the executable, and they are never in the build |
7e933683 RS |
1295 | directory when that's different from the source directory. |
1296 | ||
1297 | Instead, if these files are not in the nominal place, we try the | |
1298 | source directory. */ | |
1299 | if (data_dir == 0) | |
1300 | { | |
1301 | Lisp_Object tem, tem1, newdir; | |
1302 | ||
1303 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); | |
1304 | tem1 = Ffile_exists_p (tem); | |
1305 | if (NILP (tem1)) | |
1306 | { | |
1307 | newdir = Fexpand_file_name (build_string ("../etc/"), | |
1308 | build_string (PATH_DUMPLOADSEARCH)); | |
1309 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1310 | tem1 = Ffile_exists_p (tem); | |
1311 | if (!NILP (tem1)) | |
1312 | Vdata_directory = newdir; | |
1313 | } | |
1314 | } | |
80856e74 | 1315 | |
d883eb62 RS |
1316 | #ifndef CANNOT_DUMP |
1317 | if (initialized) | |
1318 | #endif | |
1319 | { | |
1320 | tempdir = Fdirectory_file_name (Vexec_directory); | |
1321 | if (access (XSTRING (tempdir)->data, 0) < 0) | |
1322 | dir_warning ("Warning: arch-dependent data dir (%s) does not exist.\n", | |
1323 | Vexec_directory); | |
1324 | } | |
80856e74 | 1325 | |
e576cab4 JB |
1326 | tempdir = Fdirectory_file_name (Vdata_directory); |
1327 | if (access (XSTRING (tempdir)->data, 0) < 0) | |
76d5c6cf RS |
1328 | dir_warning ("Warning: arch-independent data dir (%s) does not exist.\n", |
1329 | Vdata_directory); | |
e576cab4 | 1330 | |
80856e74 JB |
1331 | #ifdef VMS |
1332 | Vshell_file_name = build_string ("*dcl*"); | |
1333 | #else | |
e576cab4 | 1334 | sh = (char *) getenv ("SHELL"); |
80856e74 JB |
1335 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
1336 | #endif | |
8abd035b RS |
1337 | |
1338 | #ifdef VMS | |
1339 | Vtemp_file_name_pattern = build_string ("tmp:emacsXXXXXX."); | |
1340 | #else | |
1341 | if (getenv ("TMPDIR")) | |
1342 | { | |
1343 | char *dir = getenv ("TMPDIR"); | |
1344 | Vtemp_file_name_pattern | |
1345 | = Fexpand_file_name (build_string ("emacsXXXXXX"), | |
1346 | build_string (dir)); | |
1347 | } | |
1348 | else | |
1349 | Vtemp_file_name_pattern = build_string ("/tmp/emacsXXXXXX"); | |
1350 | #endif | |
9fefd2ba JB |
1351 | } |
1352 | ||
dfcf069d | 1353 | void |
9fefd2ba JB |
1354 | set_process_environment () |
1355 | { | |
1356 | register char **envp; | |
80856e74 | 1357 | |
80856e74 JB |
1358 | Vprocess_environment = Qnil; |
1359 | #ifndef CANNOT_DUMP | |
1360 | if (initialized) | |
1361 | #endif | |
1362 | for (envp = environ; *envp; envp++) | |
1363 | Vprocess_environment = Fcons (build_string (*envp), | |
1364 | Vprocess_environment); | |
80856e74 JB |
1365 | } |
1366 | ||
dfcf069d | 1367 | void |
80856e74 JB |
1368 | syms_of_callproc () |
1369 | { | |
bad95d8f | 1370 | #ifdef DOS_NT |
093650fe RS |
1371 | Qbuffer_file_type = intern ("buffer-file-type"); |
1372 | staticpro (&Qbuffer_file_type); | |
bad95d8f | 1373 | #endif /* DOS_NT */ |
7e6c2178 | 1374 | |
80856e74 JB |
1375 | DEFVAR_LISP ("shell-file-name", &Vshell_file_name, |
1376 | "*File name to load inferior shells from.\n\ | |
1377 | Initialized from the SHELL environment variable."); | |
1378 | ||
1379 | DEFVAR_LISP ("exec-path", &Vexec_path, | |
1380 | "*List of directories to search programs to run in subprocesses.\n\ | |
1381 | Each element is a string (directory name) or nil (try default directory)."); | |
1382 | ||
1383 | DEFVAR_LISP ("exec-directory", &Vexec_directory, | |
57ca9855 RS |
1384 | "Directory for executables for Emacs to invoke.\n\ |
1385 | More generally, this includes any architecture-dependent files\n\ | |
1386 | that are built and installed from the Emacs distribution."); | |
e576cab4 JB |
1387 | |
1388 | DEFVAR_LISP ("data-directory", &Vdata_directory, | |
57ca9855 RS |
1389 | "Directory of machine-independent files that come with GNU Emacs.\n\ |
1390 | These are files intended for Emacs to use while it runs."); | |
80856e74 | 1391 | |
35a2f4b8 KH |
1392 | DEFVAR_LISP ("doc-directory", &Vdoc_directory, |
1393 | "Directory containing the DOC file that comes with GNU Emacs.\n\ | |
1394 | This is usually the same as data-directory."); | |
1395 | ||
ed61592a JB |
1396 | DEFVAR_LISP ("configure-info-directory", &Vconfigure_info_directory, |
1397 | "For internal use by the build procedure only.\n\ | |
1398 | This is the name of the directory in which the build procedure installed\n\ | |
1399 | Emacs's info files; the default value for Info-default-directory-list\n\ | |
1400 | includes this."); | |
1401 | Vconfigure_info_directory = build_string (PATH_INFO); | |
1402 | ||
8abd035b RS |
1403 | DEFVAR_LISP ("temp-file-name-pattern", &Vtemp_file_name_pattern, |
1404 | "Pattern for making names for temporary files.\n\ | |
1405 | This is used by `call-process-region'."); | |
0537ec48 | 1406 | /* This variable is initialized in init_callproc. */ |
8abd035b | 1407 | |
80856e74 | 1408 | DEFVAR_LISP ("process-environment", &Vprocess_environment, |
e576cab4 JB |
1409 | "List of environment variables for subprocesses to inherit.\n\ |
1410 | Each element should be a string of the form ENVVARNAME=VALUE.\n\ | |
1411 | The environment which Emacs inherits is placed in this variable\n\ | |
1412 | when Emacs starts."); | |
80856e74 JB |
1413 | |
1414 | #ifndef VMS | |
1415 | defsubr (&Scall_process); | |
012c6fcb | 1416 | defsubr (&Sgetenv); |
986ffb24 | 1417 | #endif |
e576cab4 | 1418 | defsubr (&Scall_process_region); |
80856e74 | 1419 | } |