Commit | Line | Data |
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80856e74 | 1 | /* Synchronous subprocess invocation for GNU Emacs. |
fe12847a | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1999, 2000, 2001, |
5df4f04c | 3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
8cabe764 | 4 | Free Software Foundation, Inc. |
80856e74 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
80856e74 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
80856e74 JB |
12 | |
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
80856e74 JB |
20 | |
21 | ||
68c45bf0 | 22 | #include <config.h> |
80856e74 | 23 | #include <signal.h> |
e576cab4 | 24 | #include <errno.h> |
565620a5 | 25 | #include <stdio.h> |
d7306fe6 | 26 | #include <setjmp.h> |
80856e74 | 27 | #include <sys/types.h> |
3cbd6585 | 28 | #include <unistd.h> |
3cbd6585 | 29 | |
80856e74 | 30 | #include <sys/file.h> |
80856e74 | 31 | #include <fcntl.h> |
80856e74 | 32 | |
bad95d8f RS |
33 | #ifdef WINDOWSNT |
34 | #define NOMINMAX | |
35 | #include <windows.h> | |
489f9371 | 36 | #include "w32.h" |
bad95d8f RS |
37 | #define _P_NOWAIT 1 /* from process.h */ |
38 | #endif | |
39 | ||
7e6c2178 | 40 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
7e6c2178 RS |
41 | #include <sys/stat.h> |
42 | #include <sys/param.h> | |
7e6c2178 RS |
43 | #endif /* MSDOS */ |
44 | ||
80856e74 JB |
45 | #include "lisp.h" |
46 | #include "commands.h" | |
47 | #include "buffer.h" | |
91183bfd | 48 | #include "character.h" |
edf496dd | 49 | #include "ccl.h" |
32d08644 | 50 | #include "coding.h" |
f0b950cf | 51 | #include "composite.h" |
57bda87a | 52 | #include <epaths.h> |
80856e74 | 53 | #include "process.h" |
d177f194 | 54 | #include "syssignal.h" |
a129418f | 55 | #include "systty.h" |
aba637ec | 56 | #include "blockinput.h" |
f105f403 KL |
57 | #include "frame.h" |
58 | #include "termhooks.h" | |
80856e74 | 59 | |
5f027cea EZ |
60 | #ifdef MSDOS |
61 | #include "msdos.h" | |
62 | #endif | |
63 | ||
03695ace | 64 | #ifndef USE_CRT_DLL |
80856e74 JB |
65 | extern char **environ; |
66 | #endif | |
67 | ||
f95c3f91 | 68 | #ifdef HAVE_SETPGID |
58eb6cf0 | 69 | #if !defined (USG) |
320695d8 | 70 | #undef setpgrp |
f95c3f91 GM |
71 | #define setpgrp setpgid |
72 | #endif | |
2b7e8799 | 73 | #endif |
f95c3f91 | 74 | |
f92d51d8 CY |
75 | /* Pattern used by call-process-region to make temp files. */ |
76 | static Lisp_Object Vtemp_file_name_pattern; | |
77 | ||
bad95d8f | 78 | #ifdef DOS_NT |
093650fe | 79 | Lisp_Object Qbuffer_file_type; |
bad95d8f | 80 | #endif /* DOS_NT */ |
093650fe | 81 | |
e0f24100 | 82 | /* True if we are about to fork off a synchronous process or if we |
80856e74 JB |
83 | are waiting for it. */ |
84 | int synch_process_alive; | |
85 | ||
86 | /* Nonzero => this is a string explaining death of synchronous subprocess. */ | |
42ca4633 | 87 | const char *synch_process_death; |
80856e74 | 88 | |
6b61353c KH |
89 | /* Nonzero => this is the signal number that terminated the subprocess. */ |
90 | int synch_process_termsig; | |
91 | ||
80856e74 JB |
92 | /* If synch_process_death is zero, |
93 | this is exit code of synchronous subprocess. */ | |
94 | int synch_process_retcode; | |
f105f403 | 95 | |
80856e74 | 96 | \f |
37d54121 RS |
97 | /* Clean up when exiting Fcall_process. |
98 | On MSDOS, delete the temporary file on any kind of termination. | |
99 | On Unix, kill the process and any children on termination by signal. */ | |
100 | ||
101 | /* Nonzero if this is termination due to exit. */ | |
102 | static int call_process_exited; | |
103 | ||
d2bb6598 SM |
104 | EXFUN (Fgetenv_internal, 2); |
105 | ||
d177f194 | 106 | static Lisp_Object |
971de7fb | 107 | call_process_kill (Lisp_Object fdpid) |
d177f194 | 108 | { |
68c45bf0 | 109 | emacs_close (XFASTINT (Fcar (fdpid))); |
d177f194 JB |
110 | EMACS_KILLPG (XFASTINT (Fcdr (fdpid)), SIGKILL); |
111 | synch_process_alive = 0; | |
112 | return Qnil; | |
113 | } | |
114 | ||
80856e74 | 115 | Lisp_Object |
971de7fb | 116 | call_process_cleanup (Lisp_Object arg) |
80856e74 | 117 | { |
ad3aaf33 AS |
118 | Lisp_Object fdpid = Fcdr (arg); |
119 | #if defined (MSDOS) | |
120 | Lisp_Object file; | |
121 | #else | |
122 | int pid; | |
123 | #endif | |
124 | ||
125 | Fset_buffer (Fcar (arg)); | |
126 | ||
e39a993c | 127 | #if defined (MSDOS) |
7e6c2178 | 128 | /* for MSDOS fdpid is really (fd . tempfile) */ |
c1350752 | 129 | file = Fcdr (fdpid); |
68c45bf0 | 130 | emacs_close (XFASTINT (Fcar (fdpid))); |
d5db4077 KR |
131 | if (strcmp (SDATA (file), NULL_DEVICE) != 0) |
132 | unlink (SDATA (file)); | |
e39a993c | 133 | #else /* not MSDOS */ |
ad3aaf33 | 134 | pid = XFASTINT (Fcdr (fdpid)); |
d177f194 | 135 | |
37d54121 | 136 | if (call_process_exited) |
6b6e798b | 137 | { |
68c45bf0 | 138 | emacs_close (XFASTINT (Fcar (fdpid))); |
6b6e798b RS |
139 | return Qnil; |
140 | } | |
37d54121 | 141 | |
d177f194 JB |
142 | if (EMACS_KILLPG (pid, SIGINT) == 0) |
143 | { | |
aed13378 | 144 | int count = SPECPDL_INDEX (); |
d177f194 JB |
145 | record_unwind_protect (call_process_kill, fdpid); |
146 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); | |
147 | immediate_quit = 1; | |
148 | QUIT; | |
149 | wait_for_termination (pid); | |
150 | immediate_quit = 0; | |
151 | specpdl_ptr = specpdl + count; /* Discard the unwind protect. */ | |
152 | message1 ("Waiting for process to die...done"); | |
153 | } | |
80856e74 | 154 | synch_process_alive = 0; |
68c45bf0 | 155 | emacs_close (XFASTINT (Fcar (fdpid))); |
7e6c2178 | 156 | #endif /* not MSDOS */ |
80856e74 JB |
157 | return Qnil; |
158 | } | |
159 | ||
160 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, | |
fdb82f93 PJ |
161 | doc: /* Call PROGRAM synchronously in separate process. |
162 | The remaining arguments are optional. | |
163 | The program's input comes from file INFILE (nil means `/dev/null'). | |
164 | Insert output in BUFFER before point; t means current buffer; | |
165 | nil for BUFFER means discard it; 0 means discard and don't wait. | |
166 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, | |
167 | REAL-BUFFER says what to do with standard output, as above, | |
168 | while STDERR-FILE says what to do with standard error in the child. | |
169 | STDERR-FILE may be nil (discard standard error output), | |
170 | t (mix it with ordinary output), or a file name string. | |
171 | ||
172 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
173 | Remaining arguments are strings passed as command arguments to PROGRAM. | |
174 | ||
a4feb144 RS |
175 | If executable PROGRAM can't be found as an executable, `call-process' |
176 | signals a Lisp error. `call-process' reports errors in execution of | |
177 | the program only through its return and output. | |
178 | ||
fdb82f93 PJ |
179 | If BUFFER is 0, `call-process' returns immediately with value nil. |
180 | Otherwise it waits for PROGRAM to terminate | |
181 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
182 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
183 | ||
184 | usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */) | |
5842a27b | 185 | (int nargs, register Lisp_Object *args) |
80856e74 | 186 | { |
0aa2630f KS |
187 | Lisp_Object infile, buffer, current_dir, path; |
188 | int display_p; | |
80856e74 JB |
189 | int fd[2]; |
190 | int filefd; | |
191 | register int pid; | |
4da256b1 KS |
192 | #define CALLPROC_BUFFER_SIZE_MIN (16 * 1024) |
193 | #define CALLPROC_BUFFER_SIZE_MAX (4 * CALLPROC_BUFFER_SIZE_MIN) | |
194 | char buf[CALLPROC_BUFFER_SIZE_MAX]; | |
195 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; | |
aed13378 | 196 | int count = SPECPDL_INDEX (); |
2d607244 | 197 | |
1aa83b22 | 198 | register const unsigned char **new_argv; |
39eaa782 RS |
199 | /* File to use for stderr in the child. |
200 | t means use same as standard output. */ | |
201 | Lisp_Object error_file; | |
7e6c2178 RS |
202 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
203 | char *outf, *tempfile; | |
204 | int outfilefd; | |
80856e74 | 205 | #endif |
32d08644 KH |
206 | struct coding_system process_coding; /* coding-system of process output */ |
207 | struct coding_system argument_coding; /* coding-system of arguments */ | |
09494912 RS |
208 | /* Set to the return value of Ffind_operation_coding_system. */ |
209 | Lisp_Object coding_systems; | |
210 | ||
211 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ | |
212 | coding_systems = Qt; | |
32d08644 | 213 | |
b7826503 | 214 | CHECK_STRING (args[0]); |
80856e74 | 215 | |
39eaa782 RS |
216 | error_file = Qt; |
217 | ||
7e6c2178 RS |
218 | #ifndef subprocesses |
219 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
177c0ea7 | 220 | if (nargs >= 3 |
09ffb8b5 | 221 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
222 | error ("Operating system cannot handle asynchronous subprocesses"); |
223 | #endif /* subprocesses */ | |
224 | ||
09494912 | 225 | /* Decide the coding-system for giving arguments. */ |
32d08644 KH |
226 | { |
227 | Lisp_Object val, *args2; | |
32d08644 KH |
228 | int i; |
229 | ||
230 | /* If arguments are supplied, we may have to encode them. */ | |
231 | if (nargs >= 5) | |
232 | { | |
30d57b8e | 233 | int must_encode = 0; |
6e50da0a | 234 | Lisp_Object coding_attrs; |
30d57b8e | 235 | |
e7c1c20e | 236 | for (i = 4; i < nargs; i++) |
b7826503 | 237 | CHECK_STRING (args[i]); |
e7c1c20e | 238 | |
a2286b5c | 239 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
240 | if (STRING_MULTIBYTE (args[i])) |
241 | must_encode = 1; | |
242 | ||
beacaab3 KH |
243 | if (!NILP (Vcoding_system_for_write)) |
244 | val = Vcoding_system_for_write; | |
30d57b8e | 245 | else if (! must_encode) |
fcaf8878 | 246 | val = Qraw_text; |
beacaab3 | 247 | else |
32d08644 KH |
248 | { |
249 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); | |
250 | args2[0] = Qcall_process; | |
251 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 252 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 253 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
32d08644 | 254 | } |
fcaf8878 | 255 | val = complement_process_encoding_system (val); |
32d08644 | 256 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); |
6e50da0a KH |
257 | coding_attrs = CODING_ID_ATTRS (argument_coding.id); |
258 | if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs))) | |
259 | { | |
260 | /* We should not use an ASCII incompatible coding system. */ | |
261 | val = raw_text_coding_system (val); | |
262 | setup_coding_system (val, &argument_coding); | |
263 | } | |
32d08644 | 264 | } |
32d08644 KH |
265 | } |
266 | ||
e576cab4 JB |
267 | if (nargs >= 2 && ! NILP (args[1])) |
268 | { | |
269 | infile = Fexpand_file_name (args[1], current_buffer->directory); | |
b7826503 | 270 | CHECK_STRING (infile); |
e576cab4 | 271 | } |
80856e74 | 272 | else |
5437e9f9 | 273 | infile = build_string (NULL_DEVICE); |
80856e74 | 274 | |
e576cab4 JB |
275 | if (nargs >= 3) |
276 | { | |
39eaa782 RS |
277 | buffer = args[2]; |
278 | ||
279 | /* If BUFFER is a list, its meaning is | |
280 | (BUFFER-FOR-STDOUT FILE-FOR-STDERR). */ | |
281 | if (CONSP (buffer)) | |
282 | { | |
70949dac | 283 | if (CONSP (XCDR (buffer))) |
45be8a1e | 284 | { |
a9d4f28a | 285 | Lisp_Object stderr_file; |
70949dac | 286 | stderr_file = XCAR (XCDR (buffer)); |
45be8a1e RS |
287 | |
288 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
289 | error_file = stderr_file; | |
290 | else | |
291 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
292 | } | |
293 | ||
70949dac | 294 | buffer = XCAR (buffer); |
39eaa782 | 295 | } |
044512ed | 296 | |
39eaa782 RS |
297 | if (!(EQ (buffer, Qnil) |
298 | || EQ (buffer, Qt) | |
3ffde7d6 | 299 | || INTEGERP (buffer))) |
e576cab4 | 300 | { |
39eaa782 RS |
301 | Lisp_Object spec_buffer; |
302 | spec_buffer = buffer; | |
50fe359b | 303 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
304 | /* Mention the buffer name for a better error message. */ |
305 | if (NILP (buffer)) | |
b7826503 PJ |
306 | CHECK_BUFFER (spec_buffer); |
307 | CHECK_BUFFER (buffer); | |
e576cab4 JB |
308 | } |
309 | } | |
177c0ea7 | 310 | else |
e576cab4 | 311 | buffer = Qnil; |
80856e74 | 312 | |
58616e67 JB |
313 | /* Make sure that the child will be able to chdir to the current |
314 | buffer's current directory, or its unhandled equivalent. We | |
315 | can't just have the child check for an error when it does the | |
316 | chdir, since it's in a vfork. | |
317 | ||
318 | We have to GCPRO around this because Fexpand_file_name, | |
319 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
320 | might call a file name handling function. The argument list is | |
321 | protected by the caller, so all we really have to worry about is | |
322 | buffer. */ | |
323 | { | |
34b87689 | 324 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
58616e67 JB |
325 | |
326 | current_dir = current_buffer->directory; | |
327 | ||
34b87689 | 328 | GCPRO4 (infile, buffer, current_dir, error_file); |
58616e67 | 329 | |
ca319910 SM |
330 | current_dir = Funhandled_file_name_directory (current_dir); |
331 | if (NILP (current_dir)) | |
332 | /* If the file name handler says that current_dir is unreachable, use | |
333 | a sensible default. */ | |
334 | current_dir = build_string ("~/"); | |
335 | current_dir = expand_and_dir_to_file (current_dir, Qnil); | |
db8454b0 CY |
336 | current_dir = Ffile_name_as_directory (current_dir); |
337 | ||
58616e67 JB |
338 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
339 | report_file_error ("Setting current directory", | |
340 | Fcons (current_buffer->directory, Qnil)); | |
341 | ||
34b87689 KH |
342 | if (STRING_MULTIBYTE (infile)) |
343 | infile = ENCODE_FILE (infile); | |
344 | if (STRING_MULTIBYTE (current_dir)) | |
345 | current_dir = ENCODE_FILE (current_dir); | |
346 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) | |
347 | error_file = ENCODE_FILE (error_file); | |
58616e67 JB |
348 | UNGCPRO; |
349 | } | |
350 | ||
0aa2630f | 351 | display_p = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
80856e74 | 352 | |
d5db4077 | 353 | filefd = emacs_open (SDATA (infile), O_RDONLY, 0); |
80856e74 JB |
354 | if (filefd < 0) |
355 | { | |
34b87689 | 356 | infile = DECODE_FILE (infile); |
e576cab4 | 357 | report_file_error ("Opening process input file", Fcons (infile, Qnil)); |
80856e74 JB |
358 | } |
359 | /* Search for program; barf if not found. */ | |
c52b0b34 | 360 | { |
ad3aaf33 | 361 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
c52b0b34 | 362 | |
ad3aaf33 | 363 | GCPRO4 (infile, buffer, current_dir, error_file); |
5c150961 | 364 | openp (Vexec_path, args[0], Vexec_suffixes, &path, make_number (X_OK)); |
c52b0b34 KH |
365 | UNGCPRO; |
366 | } | |
012c6fcb | 367 | if (NILP (path)) |
80856e74 | 368 | { |
68c45bf0 | 369 | emacs_close (filefd); |
80856e74 JB |
370 | report_file_error ("Searching for program", Fcons (args[0], Qnil)); |
371 | } | |
8ee8f447 RS |
372 | |
373 | /* If program file name starts with /: for quoting a magic name, | |
374 | discard that. */ | |
375 | if (SBYTES (path) > 2 && SREF (path, 0) == '/' | |
376 | && SREF (path, 1) == ':') | |
377 | path = Fsubstring (path, make_number (2), Qnil); | |
378 | ||
1aa83b22 AS |
379 | new_argv = (const unsigned char **) |
380 | alloca (max (2, nargs - 2) * sizeof (char *)); | |
c364e618 KH |
381 | if (nargs > 4) |
382 | { | |
383 | register int i; | |
ad3aaf33 | 384 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
c364e618 | 385 | |
ad3aaf33 | 386 | GCPRO5 (infile, buffer, current_dir, path, error_file); |
c5bfa12b KH |
387 | argument_coding.dst_multibyte = 0; |
388 | for (i = 4; i < nargs; i++) | |
c364e618 | 389 | { |
c5bfa12b KH |
390 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); |
391 | if (CODING_REQUIRE_ENCODING (&argument_coding)) | |
91183bfd KH |
392 | /* We must encode this argument. */ |
393 | args[i] = encode_coding_string (&argument_coding, args[i], 1); | |
c364e618 | 394 | } |
c5bfa12b | 395 | UNGCPRO; |
1aa83b22 AS |
396 | for (i = 4; i < nargs; i++) |
397 | new_argv[i - 3] = SDATA (args[i]); | |
398 | new_argv[i - 3] = 0; | |
c364e618 | 399 | } |
db54baaa KH |
400 | else |
401 | new_argv[1] = 0; | |
1aa83b22 | 402 | new_argv[0] = SDATA (path); |
80856e74 | 403 | |
7e6c2178 | 404 | #ifdef MSDOS /* MW, July 1993 */ |
8a52365c | 405 | if ((outf = egetenv ("TMPDIR"))) |
7e6c2178 RS |
406 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); |
407 | else | |
408 | { | |
409 | tempfile = alloca (20); | |
410 | *tempfile = '\0'; | |
411 | } | |
412 | dostounix_filename (tempfile); | |
177c0ea7 | 413 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') |
7e6c2178 RS |
414 | strcat (tempfile, "/"); |
415 | strcat (tempfile, "detmp.XXX"); | |
416 | mktemp (tempfile); | |
417 | ||
418 | outfilefd = creat (tempfile, S_IREAD | S_IWRITE); | |
419 | if (outfilefd < 0) | |
420 | { | |
68c45bf0 | 421 | emacs_close (filefd); |
6f89d28a MB |
422 | report_file_error ("Opening process output file", |
423 | Fcons (build_string (tempfile), Qnil)); | |
7e6c2178 | 424 | } |
6f89d28a | 425 | fd[0] = filefd; |
2610078a | 426 | fd[1] = outfilefd; |
6f89d28a | 427 | #endif /* MSDOS */ |
7e6c2178 | 428 | |
d50d3dc8 | 429 | if (INTEGERP (buffer)) |
68c45bf0 | 430 | fd[1] = emacs_open (NULL_DEVICE, O_WRONLY, 0), fd[0] = -1; |
80856e74 JB |
431 | else |
432 | { | |
7e6c2178 | 433 | #ifndef MSDOS |
db92b288 GM |
434 | errno = 0; |
435 | if (pipe (fd) == -1) | |
436 | { | |
437 | emacs_close (filefd); | |
438 | report_file_error ("Creating process pipe", Qnil); | |
439 | } | |
80856e74 JB |
440 | #endif |
441 | } | |
442 | ||
443 | { | |
444 | /* child_setup must clobber environ in systems with true vfork. | |
445 | Protect it from permanent change. */ | |
446 | register char **save_environ = environ; | |
447 | register int fd1 = fd[1]; | |
39eaa782 | 448 | int fd_error = fd1; |
80856e74 JB |
449 | |
450 | #if 0 /* Some systems don't have sigblock. */ | |
e065a56e | 451 | mask = sigblock (sigmask (SIGCHLD)); |
80856e74 JB |
452 | #endif |
453 | ||
454 | /* Record that we're about to create a synchronous process. */ | |
455 | synch_process_alive = 1; | |
456 | ||
5c03767e RS |
457 | /* These vars record information from process termination. |
458 | Clear them now before process can possibly terminate, | |
459 | to avoid timing error if process terminates soon. */ | |
460 | synch_process_death = 0; | |
461 | synch_process_retcode = 0; | |
6b61353c | 462 | synch_process_termsig = 0; |
5c03767e | 463 | |
39eaa782 | 464 | if (NILP (error_file)) |
68c45bf0 | 465 | fd_error = emacs_open (NULL_DEVICE, O_WRONLY, 0); |
39eaa782 RS |
466 | else if (STRINGP (error_file)) |
467 | { | |
468 | #ifdef DOS_NT | |
d5db4077 | 469 | fd_error = emacs_open (SDATA (error_file), |
68c45bf0 PE |
470 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, |
471 | S_IREAD | S_IWRITE); | |
39eaa782 | 472 | #else /* not DOS_NT */ |
d5db4077 | 473 | fd_error = creat (SDATA (error_file), 0666); |
39eaa782 RS |
474 | #endif /* not DOS_NT */ |
475 | } | |
476 | ||
477 | if (fd_error < 0) | |
478 | { | |
68c45bf0 | 479 | emacs_close (filefd); |
6f89d28a | 480 | if (fd[0] != filefd) |
68c45bf0 | 481 | emacs_close (fd[0]); |
39eaa782 | 482 | if (fd1 >= 0) |
68c45bf0 | 483 | emacs_close (fd1); |
6f89d28a MB |
484 | #ifdef MSDOS |
485 | unlink (tempfile); | |
486 | #endif | |
34b87689 KH |
487 | if (NILP (error_file)) |
488 | error_file = build_string (NULL_DEVICE); | |
489 | else if (STRINGP (error_file)) | |
490 | error_file = DECODE_FILE (error_file); | |
491 | report_file_error ("Cannot redirect stderr", Fcons (error_file, Qnil)); | |
39eaa782 | 492 | } |
89e1ec1d | 493 | |
2610078a | 494 | #ifdef MSDOS /* MW, July 1993 */ |
c17c4250 | 495 | /* Note that on MSDOS `child_setup' actually returns the child process |
2610078a KH |
496 | exit status, not its PID, so we assign it to `synch_process_retcode' |
497 | below. */ | |
c17c4250 EZ |
498 | pid = child_setup (filefd, outfilefd, fd_error, (char **) new_argv, |
499 | 0, current_dir); | |
39eaa782 | 500 | |
2610078a KH |
501 | /* Record that the synchronous process exited and note its |
502 | termination status. */ | |
503 | synch_process_alive = 0; | |
504 | synch_process_retcode = pid; | |
505 | if (synch_process_retcode < 0) /* means it couldn't be exec'ed */ | |
68c45bf0 | 506 | { |
ca9c0567 | 507 | synchronize_system_messages_locale (); |
68c45bf0 PE |
508 | synch_process_death = strerror (errno); |
509 | } | |
2610078a | 510 | |
68c45bf0 | 511 | emacs_close (outfilefd); |
2610078a | 512 | if (fd_error != outfilefd) |
68c45bf0 | 513 | emacs_close (fd_error); |
2610078a | 514 | fd1 = -1; /* No harm in closing that one! */ |
32d08644 KH |
515 | /* Since CRLF is converted to LF within `decode_coding', we can |
516 | always open a file with binary mode. */ | |
68c45bf0 | 517 | fd[0] = emacs_open (tempfile, O_RDONLY | O_BINARY, 0); |
2610078a KH |
518 | if (fd[0] < 0) |
519 | { | |
520 | unlink (tempfile); | |
68c45bf0 | 521 | emacs_close (filefd); |
2610078a KH |
522 | report_file_error ("Cannot re-open temporary file", Qnil); |
523 | } | |
524 | #else /* not MSDOS */ | |
bad95d8f | 525 | #ifdef WINDOWSNT |
2d607244 RS |
526 | pid = child_setup (filefd, fd1, fd_error, (char **) new_argv, |
527 | 0, current_dir); | |
bad95d8f | 528 | #else /* not WINDOWSNT */ |
aba637ec KS |
529 | BLOCK_INPUT; |
530 | ||
80856e74 JB |
531 | pid = vfork (); |
532 | ||
533 | if (pid == 0) | |
534 | { | |
535 | if (fd[0] >= 0) | |
68c45bf0 | 536 | emacs_close (fd[0]); |
1e7963c7 RS |
537 | #ifdef HAVE_SETSID |
538 | setsid (); | |
539 | #endif | |
58eb6cf0 | 540 | #if defined (USG) |
80856e74 JB |
541 | setpgrp (); |
542 | #else | |
543 | setpgrp (pid, pid); | |
544 | #endif /* USG */ | |
2d607244 RS |
545 | child_setup (filefd, fd1, fd_error, (char **) new_argv, |
546 | 0, current_dir); | |
80856e74 | 547 | } |
aba637ec KS |
548 | |
549 | UNBLOCK_INPUT; | |
bad95d8f | 550 | #endif /* not WINDOWSNT */ |
cd5f8f60 RS |
551 | |
552 | /* The MSDOS case did this already. */ | |
553 | if (fd_error >= 0) | |
68c45bf0 | 554 | emacs_close (fd_error); |
2610078a | 555 | #endif /* not MSDOS */ |
80856e74 | 556 | |
80856e74 JB |
557 | environ = save_environ; |
558 | ||
6b6e798b RS |
559 | /* Close most of our fd's, but not fd[0] |
560 | since we will use that to read input from. */ | |
68c45bf0 | 561 | emacs_close (filefd); |
799abb26 | 562 | if (fd1 >= 0 && fd1 != fd_error) |
68c45bf0 | 563 | emacs_close (fd1); |
80856e74 JB |
564 | } |
565 | ||
566 | if (pid < 0) | |
567 | { | |
6b6e798b | 568 | if (fd[0] >= 0) |
68c45bf0 | 569 | emacs_close (fd[0]); |
80856e74 JB |
570 | report_file_error ("Doing vfork", Qnil); |
571 | } | |
572 | ||
d50d3dc8 | 573 | if (INTEGERP (buffer)) |
80856e74 | 574 | { |
6b6e798b | 575 | if (fd[0] >= 0) |
68c45bf0 | 576 | emacs_close (fd[0]); |
80856e74 JB |
577 | return Qnil; |
578 | } | |
579 | ||
6b6e798b | 580 | /* Enable sending signal if user quits below. */ |
37d54121 RS |
581 | call_process_exited = 0; |
582 | ||
e39a993c | 583 | #if defined(MSDOS) |
7e6c2178 RS |
584 | /* MSDOS needs different cleanup information. */ |
585 | record_unwind_protect (call_process_cleanup, | |
ad3aaf33 AS |
586 | Fcons (Fcurrent_buffer (), |
587 | Fcons (make_number (fd[0]), | |
588 | build_string (tempfile)))); | |
7e6c2178 | 589 | #else |
80856e74 | 590 | record_unwind_protect (call_process_cleanup, |
ad3aaf33 AS |
591 | Fcons (Fcurrent_buffer (), |
592 | Fcons (make_number (fd[0]), make_number (pid)))); | |
e39a993c | 593 | #endif /* not MSDOS */ |
80856e74 JB |
594 | |
595 | ||
d50d3dc8 | 596 | if (BUFFERP (buffer)) |
80856e74 JB |
597 | Fset_buffer (buffer); |
598 | ||
09494912 RS |
599 | if (NILP (buffer)) |
600 | { | |
601 | /* If BUFFER is nil, we must read process output once and then | |
602 | discard it, so setup coding system but with nil. */ | |
603 | setup_coding_system (Qnil, &process_coding); | |
604 | } | |
605 | else | |
606 | { | |
607 | Lisp_Object val, *args2; | |
608 | ||
609 | val = Qnil; | |
610 | if (!NILP (Vcoding_system_for_read)) | |
611 | val = Vcoding_system_for_read; | |
612 | else | |
613 | { | |
614 | if (EQ (coding_systems, Qt)) | |
615 | { | |
616 | int i; | |
617 | ||
618 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); | |
619 | args2[0] = Qcall_process; | |
620 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
621 | coding_systems | |
622 | = Ffind_operation_coding_system (nargs + 1, args2); | |
623 | } | |
624 | if (CONSP (coding_systems)) | |
70949dac | 625 | val = XCAR (coding_systems); |
09494912 | 626 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 627 | val = XCAR (Vdefault_process_coding_system); |
09494912 RS |
628 | else |
629 | val = Qnil; | |
630 | } | |
91183bfd | 631 | Fcheck_coding_system (val); |
09494912 RS |
632 | /* In unibyte mode, character code conversion should not take |
633 | place but EOL conversion should. So, setup raw-text or one | |
634 | of the subsidiary according to the information just setup. */ | |
635 | if (NILP (current_buffer->enable_multibyte_characters) | |
636 | && !NILP (val)) | |
91183bfd KH |
637 | val = raw_text_coding_system (val); |
638 | setup_coding_system (val, &process_coding); | |
09494912 RS |
639 | } |
640 | ||
80856e74 JB |
641 | immediate_quit = 1; |
642 | QUIT; | |
643 | ||
644 | { | |
69481da7 | 645 | register EMACS_INT nread; |
0ad477db | 646 | int first = 1; |
69481da7 | 647 | EMACS_INT total_read = 0; |
321fecde | 648 | int carryover = 0; |
0aa2630f | 649 | int display_on_the_fly = display_p; |
05b44e90 KH |
650 | struct coding_system saved_coding; |
651 | ||
652 | saved_coding = process_coding; | |
60558b19 | 653 | while (1) |
80856e74 | 654 | { |
60558b19 RS |
655 | /* Repeatedly read until we've filled as much as possible |
656 | of the buffer size we have. But don't read | |
8e6208c5 | 657 | less than 1024--save that for the next bufferful. */ |
321fecde | 658 | nread = carryover; |
60558b19 | 659 | while (nread < bufsize - 1024) |
00fb3e95 | 660 | { |
4da256b1 | 661 | int this_read = emacs_read (fd[0], buf + nread, |
68c45bf0 | 662 | bufsize - nread); |
60558b19 RS |
663 | |
664 | if (this_read < 0) | |
665 | goto give_up; | |
666 | ||
667 | if (this_read == 0) | |
7a7ab107 KH |
668 | { |
669 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
670 | break; | |
671 | } | |
60558b19 RS |
672 | |
673 | nread += this_read; | |
7a7ab107 | 674 | total_read += this_read; |
60558b19 | 675 | |
7a7ab107 KH |
676 | if (display_on_the_fly) |
677 | break; | |
678 | } | |
60558b19 RS |
679 | |
680 | /* Now NREAD is the total amount of data in the buffer. */ | |
80856e74 | 681 | immediate_quit = 0; |
177c0ea7 | 682 | |
012c6fcb | 683 | if (!NILP (buffer)) |
32d08644 | 684 | { |
bb4a3884 KH |
685 | if (NILP (current_buffer->enable_multibyte_characters) |
686 | && ! CODING_MAY_REQUIRE_DECODING (&process_coding)) | |
4da256b1 | 687 | insert_1_both (buf, nread, nread, 0, 1, 0); |
32d08644 KH |
688 | else |
689 | { /* We have to decode the input. */ | |
45d60801 | 690 | Lisp_Object curbuf; |
71a0c011 | 691 | int count1 = SPECPDL_INDEX (); |
177c0ea7 | 692 | |
45d60801 | 693 | XSETBUFFER (curbuf, current_buffer); |
71a0c011 EZ |
694 | /* We cannot allow after-change-functions be run |
695 | during decoding, because that might modify the | |
696 | buffer, while we rely on process_coding.produced to | |
697 | faithfully reflect inserted text until we | |
698 | TEMP_SET_PT_BOTH below. */ | |
699 | specbind (Qinhibit_modification_hooks, Qt); | |
45d60801 KH |
700 | decode_coding_c_string (&process_coding, buf, nread, |
701 | curbuf); | |
71a0c011 | 702 | unbind_to (count1, Qnil); |
7a7ab107 | 703 | if (display_on_the_fly |
91183bfd KH |
704 | && CODING_REQUIRE_DETECTION (&saved_coding) |
705 | && ! CODING_REQUIRE_DETECTION (&process_coding)) | |
7a7ab107 KH |
706 | { |
707 | /* We have detected some coding system. But, | |
708 | there's a possibility that the detection was | |
709 | done by insufficient data. So, we give up | |
710 | displaying on the fly. */ | |
91183bfd KH |
711 | if (process_coding.produced > 0) |
712 | del_range_2 (process_coding.dst_pos, | |
713 | process_coding.dst_pos_byte, | |
714 | process_coding.dst_pos | |
715 | + process_coding.produced_char, | |
716 | process_coding.dst_pos_byte | |
717 | + process_coding.produced, 0); | |
7a7ab107 KH |
718 | display_on_the_fly = 0; |
719 | process_coding = saved_coding; | |
720 | carryover = nread; | |
0aa2630f KS |
721 | /* This is to make the above condition always |
722 | fails in the future. */ | |
21d0467f KH |
723 | saved_coding.common_flags |
724 | &= ~CODING_REQUIRE_DETECTION_MASK; | |
7a7ab107 KH |
725 | continue; |
726 | } | |
177c0ea7 | 727 | |
ea99bcc1 KH |
728 | TEMP_SET_PT_BOTH (PT + process_coding.produced_char, |
729 | PT_BYTE + process_coding.produced); | |
54ab3d3b | 730 | carryover = process_coding.carryover_bytes; |
321fecde | 731 | if (carryover > 0) |
72af86bd AS |
732 | memcpy (buf, process_coding.carryover, |
733 | process_coding.carryover_bytes); | |
32d08644 KH |
734 | } |
735 | } | |
c5bfa12b | 736 | |
321fecde | 737 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
c5bfa12b | 738 | break; |
6e3bfbb2 RS |
739 | |
740 | /* Make the buffer bigger as we continue to read more data, | |
4da256b1 KS |
741 | but not past CALLPROC_BUFFER_SIZE_MAX. */ |
742 | if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) | |
743 | if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) | |
744 | bufsize = CALLPROC_BUFFER_SIZE_MAX; | |
6e3bfbb2 | 745 | |
0aa2630f | 746 | if (display_p) |
0ad477db RS |
747 | { |
748 | if (first) | |
749 | prepare_menu_bars (); | |
750 | first = 0; | |
3007ebfb | 751 | redisplay_preserve_echo_area (1); |
0aa2630f KS |
752 | /* This variable might have been set to 0 for code |
753 | detection. In that case, we set it back to 1 because | |
754 | we should have already detected a coding system. */ | |
755 | display_on_the_fly = 1; | |
0ad477db | 756 | } |
80856e74 JB |
757 | immediate_quit = 1; |
758 | QUIT; | |
759 | } | |
60558b19 | 760 | give_up: ; |
80856e74 | 761 | |
91183bfd KH |
762 | Vlast_coding_system_used = CODING_ID_NAME (process_coding.id); |
763 | /* If the caller required, let the buffer inherit the | |
764 | coding-system used to decode the process output. */ | |
765 | if (inherit_process_coding_system) | |
766 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
ad3aaf33 | 767 | make_number (total_read)); |
3b440bb5 EZ |
768 | } |
769 | ||
77defa9a | 770 | #ifndef MSDOS |
80856e74 JB |
771 | /* Wait for it to terminate, unless it already has. */ |
772 | wait_for_termination (pid); | |
77defa9a | 773 | #endif |
80856e74 JB |
774 | |
775 | immediate_quit = 0; | |
776 | ||
37d54121 RS |
777 | /* Don't kill any children that the subprocess may have left behind |
778 | when exiting. */ | |
779 | call_process_exited = 1; | |
780 | ||
80856e74 JB |
781 | unbind_to (count, Qnil); |
782 | ||
6b61353c KH |
783 | if (synch_process_termsig) |
784 | { | |
42ca4633 | 785 | const char *signame; |
6b61353c KH |
786 | |
787 | synchronize_system_messages_locale (); | |
788 | signame = strsignal (synch_process_termsig); | |
789 | ||
790 | if (signame == 0) | |
791 | signame = "unknown"; | |
792 | ||
793 | synch_process_death = signame; | |
794 | } | |
795 | ||
80856e74 | 796 | if (synch_process_death) |
68c45bf0 PE |
797 | return code_convert_string_norecord (build_string (synch_process_death), |
798 | Vlocale_coding_system, 0); | |
80856e74 JB |
799 | return make_number (synch_process_retcode); |
800 | } | |
80856e74 | 801 | \f |
9fefd2ba | 802 | static Lisp_Object |
971de7fb | 803 | delete_temp_file (Lisp_Object name) |
80856e74 | 804 | { |
1a271e14 KR |
805 | /* Suppress jka-compr handling, etc. */ |
806 | int count = SPECPDL_INDEX (); | |
807 | specbind (intern ("file-name-handler-alist"), Qnil); | |
f1a5d776 | 808 | internal_delete_file (name); |
1a271e14 | 809 | unbind_to (count, Qnil); |
320695d8 | 810 | return Qnil; |
80856e74 JB |
811 | } |
812 | ||
813 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
fdb82f93 PJ |
814 | 3, MANY, 0, |
815 | doc: /* Send text from START to END to a synchronous process running PROGRAM. | |
816 | The remaining arguments are optional. | |
817 | Delete the text if fourth arg DELETE is non-nil. | |
818 | ||
819 | Insert output in BUFFER before point; t means current buffer; | |
820 | nil for BUFFER means discard it; 0 means discard and don't wait. | |
821 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, | |
822 | REAL-BUFFER says what to do with standard output, as above, | |
823 | while STDERR-FILE says what to do with standard error in the child. | |
824 | STDERR-FILE may be nil (discard standard error output), | |
825 | t (mix it with ordinary output), or a file name string. | |
826 | ||
827 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
828 | Remaining args are passed to PROGRAM at startup as command args. | |
829 | ||
ba9a5174 | 830 | If BUFFER is 0, `call-process-region' returns immediately with value nil. |
fdb82f93 PJ |
831 | Otherwise it waits for PROGRAM to terminate |
832 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
833 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
834 | ||
835 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) | |
5842a27b | 836 | (int nargs, register Lisp_Object *args) |
80856e74 | 837 | { |
39323a7e KH |
838 | struct gcpro gcpro1; |
839 | Lisp_Object filename_string; | |
840 | register Lisp_Object start, end; | |
aed13378 | 841 | int count = SPECPDL_INDEX (); |
08ee4e87 | 842 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
09494912 | 843 | Lisp_Object coding_systems; |
32d08644 KH |
844 | Lisp_Object val, *args2; |
845 | int i; | |
7e6c2178 | 846 | char *tempfile; |
f92d51d8 | 847 | Lisp_Object tmpdir, pattern; |
7e6c2178 | 848 | |
f92d51d8 CY |
849 | if (STRINGP (Vtemporary_file_directory)) |
850 | tmpdir = Vtemporary_file_directory; | |
7e6c2178 RS |
851 | else |
852 | { | |
f92d51d8 CY |
853 | #ifndef DOS_NT |
854 | if (getenv ("TMPDIR")) | |
855 | tmpdir = build_string (getenv ("TMPDIR")); | |
856 | else | |
857 | tmpdir = build_string ("/tmp/"); | |
858 | #else /* DOS_NT */ | |
859 | char *outf; | |
860 | if ((outf = egetenv ("TMPDIR")) | |
861 | || (outf = egetenv ("TMP")) | |
862 | || (outf = egetenv ("TEMP"))) | |
863 | tmpdir = build_string (outf); | |
864 | else | |
865 | tmpdir = Ffile_name_as_directory (build_string ("c:/temp")); | |
0774fcf8 | 866 | #endif |
f92d51d8 | 867 | } |
7e6c2178 | 868 | |
f92d51d8 CY |
869 | pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir); |
870 | tempfile = (char *) alloca (SBYTES (pattern) + 1); | |
72af86bd | 871 | memcpy (tempfile, SDATA (pattern), SBYTES (pattern) + 1); |
09494912 RS |
872 | coding_systems = Qt; |
873 | ||
1ddc85a4 DL |
874 | #ifdef HAVE_MKSTEMP |
875 | { | |
d277f1f7 YM |
876 | int fd; |
877 | ||
878 | BLOCK_INPUT; | |
879 | fd = mkstemp (tempfile); | |
880 | UNBLOCK_INPUT; | |
1ddc85a4 DL |
881 | if (fd == -1) |
882 | report_file_error ("Failed to open temporary file", | |
883 | Fcons (Vtemp_file_name_pattern, Qnil)); | |
884 | else | |
885 | close (fd); | |
886 | } | |
887 | #else | |
80856e74 | 888 | mktemp (tempfile); |
1ddc85a4 | 889 | #endif |
80856e74 JB |
890 | |
891 | filename_string = build_string (tempfile); | |
39323a7e | 892 | GCPRO1 (filename_string); |
80856e74 JB |
893 | start = args[0]; |
894 | end = args[1]; | |
32d08644 | 895 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
896 | if (!NILP (Vcoding_system_for_write)) |
897 | val = Vcoding_system_for_write; | |
898 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
fcaf8878 | 899 | val = Qraw_text; |
32d08644 | 900 | else |
beacaab3 | 901 | { |
91489411 RS |
902 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); |
903 | args2[0] = Qcall_process_region; | |
904 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
905 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); | |
fcaf8878 | 906 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
beacaab3 | 907 | } |
fcaf8878 | 908 | val = complement_process_encoding_system (val); |
32d08644 | 909 | |
168afdaa | 910 | { |
aed13378 | 911 | int count1 = SPECPDL_INDEX (); |
168afdaa RS |
912 | |
913 | specbind (intern ("coding-system-for-write"), val); | |
bb951f0e KR |
914 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
915 | happen to get a ".Z" suffix. */ | |
916 | specbind (intern ("file-name-handler-alist"), Qnil); | |
168afdaa RS |
917 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil); |
918 | ||
919 | unbind_to (count1, Qnil); | |
920 | } | |
91489411 | 921 | |
177c0ea7 | 922 | /* Note that Fcall_process takes care of binding |
91489411 | 923 | coding-system-for-read. */ |
093650fe | 924 | |
80856e74 JB |
925 | record_unwind_protect (delete_temp_file, filename_string); |
926 | ||
edf496dd | 927 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
928 | Fdelete_region (start, end); |
929 | ||
edf496dd KH |
930 | if (nargs > 3) |
931 | { | |
932 | args += 2; | |
933 | nargs -= 2; | |
934 | } | |
935 | else | |
936 | { | |
937 | args[0] = args[2]; | |
938 | nargs = 2; | |
939 | } | |
940 | args[1] = filename_string; | |
80856e74 | 941 | |
edf496dd | 942 | RETURN_UNGCPRO (unbind_to (count, Fcall_process (nargs, args))); |
80856e74 JB |
943 | } |
944 | \f | |
361358ea | 945 | #ifndef WINDOWSNT |
971de7fb | 946 | static int relocate_fd (int fd, int minfd); |
361358ea | 947 | #endif |
dfcf069d | 948 | |
5990851d KL |
949 | static char ** |
950 | add_env (char **env, char **new_env, char *string) | |
951 | { | |
952 | char **ep; | |
953 | int ok = 1; | |
954 | if (string == NULL) | |
955 | return new_env; | |
956 | ||
957 | /* See if this string duplicates any string already in the env. | |
958 | If so, don't put it in. | |
959 | When an env var has multiple definitions, | |
960 | we keep the definition that comes first in process-environment. */ | |
961 | for (ep = env; ok && ep != new_env; ep++) | |
962 | { | |
963 | char *p = *ep, *q = string; | |
964 | while (ok) | |
965 | { | |
966 | if (*q != *p) | |
967 | break; | |
968 | if (*q == 0) | |
969 | /* The string is a lone variable name; keep it for now, we | |
970 | will remove it later. It is a placeholder for a | |
971 | variable that is not to be included in the environment. */ | |
972 | break; | |
973 | if (*q == '=') | |
974 | ok = 0; | |
975 | p++, q++; | |
976 | } | |
977 | } | |
978 | if (ok) | |
979 | *new_env++ = string; | |
980 | return new_env; | |
981 | } | |
982 | ||
80856e74 JB |
983 | /* This is the last thing run in a newly forked inferior |
984 | either synchronous or asynchronous. | |
985 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
986 | Initialize inferior's priority, pgrp, connected dir and environment. | |
987 | then exec another program based on new_argv. | |
988 | ||
989 | This function may change environ for the superior process. | |
990 | Therefore, the superior process must save and restore the value | |
991 | of environ around the vfork and the call to this function. | |
992 | ||
80856e74 | 993 | SET_PGRP is nonzero if we should put the subprocess into a separate |
177c0ea7 | 994 | process group. |
e576cab4 JB |
995 | |
996 | CURRENT_DIR is an elisp string giving the path of the current | |
997 | directory the subprocess should have. Since we can't really signal | |
998 | a decent error from within the child, this should be verified as an | |
999 | executable directory by the parent. */ | |
80856e74 | 1000 | |
dfcf069d | 1001 | int |
971de7fb | 1002 | child_setup (int in, int out, int err, register char **new_argv, int set_pgrp, Lisp_Object current_dir) |
80856e74 | 1003 | { |
e576cab4 | 1004 | char **env; |
7fcf7f05 | 1005 | char *pwd_var; |
bad95d8f RS |
1006 | #ifdef WINDOWSNT |
1007 | int cpid; | |
4252a4bd | 1008 | HANDLE handles[3]; |
bad95d8f | 1009 | #endif /* WINDOWSNT */ |
e576cab4 | 1010 | |
33abe2d9 | 1011 | int pid = getpid (); |
80856e74 | 1012 | |
80856e74 JB |
1013 | /* Close Emacs's descriptors that this process should not have. */ |
1014 | close_process_descs (); | |
ded80a25 | 1015 | |
c17c4250 EZ |
1016 | /* DOS_NT isn't in a vfork, so if we are in the middle of load-file, |
1017 | we will lose if we call close_load_descs here. */ | |
1018 | #ifndef DOS_NT | |
4458cebe | 1019 | close_load_descs (); |
c17c4250 | 1020 | #endif |
80856e74 JB |
1021 | |
1022 | /* Note that use of alloca is always safe here. It's obvious for systems | |
1023 | that do not have true vfork or that have true (stack) alloca. | |
caa01fe0 GM |
1024 | If using vfork and C_ALLOCA (when Emacs used to include |
1025 | src/alloca.c) it is safe because that changes the superior's | |
1026 | static variables as if the superior had done alloca and will be | |
1027 | cleaned up in the usual way. */ | |
e576cab4 | 1028 | { |
7fcf7f05 | 1029 | register char *temp; |
e576cab4 | 1030 | register int i; |
77d78be1 | 1031 | |
d5db4077 | 1032 | i = SBYTES (current_dir); |
16425c4a EZ |
1033 | #ifdef MSDOS |
1034 | /* MSDOS must have all environment variables malloc'ed, because | |
1035 | low-level libc functions that launch subsidiary processes rely | |
1036 | on that. */ | |
1037 | pwd_var = (char *) xmalloc (i + 6); | |
1038 | #else | |
7fcf7f05 | 1039 | pwd_var = (char *) alloca (i + 6); |
16425c4a | 1040 | #endif |
7fcf7f05 | 1041 | temp = pwd_var + 4; |
72af86bd AS |
1042 | memcpy (pwd_var, "PWD=", 4); |
1043 | memcpy (temp, SDATA (current_dir), i); | |
bad95d8f | 1044 | if (!IS_DIRECTORY_SEP (temp[i - 1])) temp[i++] = DIRECTORY_SEP; |
e576cab4 JB |
1045 | temp[i] = 0; |
1046 | ||
c17c4250 | 1047 | #ifndef DOS_NT |
e576cab4 JB |
1048 | /* We can't signal an Elisp error here; we're in a vfork. Since |
1049 | the callers check the current directory before forking, this | |
1050 | should only return an error if the directory's permissions | |
1051 | are changed between the check and this chdir, but we should | |
1052 | at least check. */ | |
1053 | if (chdir (temp) < 0) | |
20b25e46 | 1054 | _exit (errno); |
f8d23104 | 1055 | #else /* DOS_NT */ |
c17c4250 EZ |
1056 | /* Get past the drive letter, so that d:/ is left alone. */ |
1057 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
1058 | { | |
1059 | temp += 2; | |
1060 | i -= 2; | |
1061 | } | |
f8d23104 | 1062 | #endif /* DOS_NT */ |
c17c4250 | 1063 | |
7fcf7f05 | 1064 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 1065 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 1066 | temp[--i] = 0; |
e576cab4 | 1067 | } |
80856e74 | 1068 | |
5990851d | 1069 | /* Set `env' to a vector of the strings in the environment. */ |
80856e74 JB |
1070 | { |
1071 | register Lisp_Object tem; | |
1072 | register char **new_env; | |
5990851d | 1073 | char **p, **q; |
80856e74 | 1074 | register int new_length; |
d2bb6598 | 1075 | Lisp_Object display = Qnil; |
361358ea | 1076 | |
80856e74 | 1077 | new_length = 0; |
f105f403 | 1078 | |
80856e74 | 1079 | for (tem = Vprocess_environment; |
5990851d KL |
1080 | CONSP (tem) && STRINGP (XCAR (tem)); |
1081 | tem = XCDR (tem)) | |
d2bb6598 SM |
1082 | { |
1083 | if (strncmp (SDATA (XCAR (tem)), "DISPLAY", 7) == 0 | |
1084 | && (SDATA (XCAR (tem)) [7] == '\0' | |
1085 | || SDATA (XCAR (tem)) [7] == '=')) | |
1086 | /* DISPLAY is specified in process-environment. */ | |
1087 | display = Qt; | |
1088 | new_length++; | |
1089 | } | |
de87fb59 | 1090 | |
d2bb6598 SM |
1091 | /* If not provided yet, use the frame's DISPLAY. */ |
1092 | if (NILP (display)) | |
1093 | { | |
1094 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); | |
1095 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) | |
1096 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1097 | tmp = Fgetenv_internal (build_string ("DISPLAY"), | |
1098 | Vinitial_environment); | |
1099 | if (STRINGP (tmp)) | |
1100 | { | |
1101 | display = tmp; | |
1102 | new_length++; | |
1103 | } | |
1104 | } | |
80856e74 | 1105 | |
7fcf7f05 RS |
1106 | /* new_length + 2 to include PWD and terminating 0. */ |
1107 | env = new_env = (char **) alloca ((new_length + 2) * sizeof (char *)); | |
7fcf7f05 RS |
1108 | /* If we have a PWD envvar, pass one down, |
1109 | but with corrected value. */ | |
a13f8f50 | 1110 | if (egetenv ("PWD")) |
7fcf7f05 | 1111 | *new_env++ = pwd_var; |
361358ea | 1112 | |
6b8e474c | 1113 | if (STRINGP (display)) |
de87fb59 DN |
1114 | { |
1115 | int vlen = strlen ("DISPLAY=") + strlen (SDATA (display)) + 1; | |
1116 | char *vdata = (char *) alloca (vlen); | |
1117 | strcpy (vdata, "DISPLAY="); | |
1118 | strcat (vdata, SDATA (display)); | |
1119 | new_env = add_env (env, new_env, vdata); | |
1120 | } | |
80856e74 | 1121 | |
5990851d | 1122 | /* Overrides. */ |
80856e74 | 1123 | for (tem = Vprocess_environment; |
70949dac KR |
1124 | CONSP (tem) && STRINGP (XCAR (tem)); |
1125 | tem = XCDR (tem)) | |
5990851d | 1126 | new_env = add_env (env, new_env, SDATA (XCAR (tem))); |
d2bb6598 | 1127 | |
5990851d KL |
1128 | *new_env = 0; |
1129 | ||
1130 | /* Remove variable names without values. */ | |
1131 | p = q = env; | |
1132 | while (*p != 0) | |
cd9565ba | 1133 | { |
5990851d | 1134 | while (*q != 0 && strchr (*q, '=') == NULL) |
1baf6db9 | 1135 | q++; |
5990851d KL |
1136 | *p = *q++; |
1137 | if (*p != 0) | |
1138 | p++; | |
cd9565ba | 1139 | } |
80856e74 | 1140 | } |
de87fb59 | 1141 | |
361358ea | 1142 | |
bad95d8f RS |
1143 | #ifdef WINDOWSNT |
1144 | prepare_standard_handles (in, out, err, handles); | |
d5db4077 | 1145 | set_process_dir (SDATA (current_dir)); |
67802943 DN |
1146 | /* Spawn the child. (See ntproc.c:Spawnve). */ |
1147 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); | |
1148 | reset_standard_handles (in, out, err, handles); | |
1149 | if (cpid == -1) | |
1150 | /* An error occurred while trying to spawn the process. */ | |
1151 | report_file_error ("Spawning child process", Qnil); | |
1152 | return cpid; | |
1153 | ||
bad95d8f | 1154 | #else /* not WINDOWSNT */ |
426b37ae JB |
1155 | /* Make sure that in, out, and err are not actually already in |
1156 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1157 | started with its standard in, out, or error closed, as might |
426b37ae | 1158 | happen under X. */ |
f29f9e4a RS |
1159 | { |
1160 | int oin = in, oout = out; | |
1161 | ||
1162 | /* We have to avoid relocating the same descriptor twice! */ | |
1163 | ||
1164 | in = relocate_fd (in, 3); | |
1165 | ||
1166 | if (out == oin) | |
1167 | out = in; | |
1168 | else | |
3e9367e7 | 1169 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1170 | |
1171 | if (err == oin) | |
1172 | err = in; | |
1173 | else if (err == oout) | |
1174 | err = out; | |
1175 | else | |
3e9367e7 | 1176 | err = relocate_fd (err, 3); |
f29f9e4a | 1177 | } |
426b37ae | 1178 | |
c17c4250 | 1179 | #ifndef MSDOS |
68c45bf0 PE |
1180 | emacs_close (0); |
1181 | emacs_close (1); | |
1182 | emacs_close (2); | |
80856e74 JB |
1183 | |
1184 | dup2 (in, 0); | |
1185 | dup2 (out, 1); | |
1186 | dup2 (err, 2); | |
68c45bf0 | 1187 | emacs_close (in); |
ce8f5a9a AS |
1188 | if (out != in) |
1189 | emacs_close (out); | |
1190 | if (err != in && err != out) | |
1191 | emacs_close (err); | |
80856e74 | 1192 | |
58eb6cf0 | 1193 | #if defined(USG) |
fdba8590 | 1194 | #ifndef SETPGRP_RELEASES_CTTY |
e576cab4 | 1195 | setpgrp (); /* No arguments but equivalent in this case */ |
fdba8590 | 1196 | #endif |
67802943 | 1197 | #else /* not USG */ |
e576cab4 | 1198 | setpgrp (pid, pid); |
67802943 | 1199 | #endif /* not USG */ |
80856e74 | 1200 | |
a7ebc409 | 1201 | /* setpgrp_of_tty is incorrect here; it uses input_fd. */ |
12e610e8 | 1202 | tcsetpgrp (0, pid); |
a7ebc409 | 1203 | |
80856e74 JB |
1204 | /* execvp does not accept an environment arg so the only way |
1205 | to pass this environment is to set environ. Our caller | |
1206 | is responsible for restoring the ambient value of environ. */ | |
1207 | environ = env; | |
1208 | execvp (new_argv[0], new_argv); | |
1209 | ||
68c45bf0 PE |
1210 | emacs_write (1, "Can't exec program: ", 20); |
1211 | emacs_write (1, new_argv[0], strlen (new_argv[0])); | |
1212 | emacs_write (1, "\n", 1); | |
80856e74 | 1213 | _exit (1); |
67802943 DN |
1214 | |
1215 | #else /* MSDOS */ | |
1216 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
1217 | xfree (pwd_var); | |
1218 | if (pid == -1) | |
1219 | /* An error occurred while trying to run the subprocess. */ | |
1220 | report_file_error ("Spawning child process", Qnil); | |
1221 | return pid; | |
1222 | #endif /* MSDOS */ | |
ae76d9e1 | 1223 | #endif /* not WINDOWSNT */ |
80856e74 JB |
1224 | } |
1225 | ||
361358ea | 1226 | #ifndef WINDOWSNT |
a3833dfe | 1227 | /* Move the file descriptor FD so that its number is not less than MINFD. |
426b37ae | 1228 | If the file descriptor is moved at all, the original is freed. */ |
dfcf069d | 1229 | static int |
971de7fb | 1230 | relocate_fd (int fd, int minfd) |
426b37ae | 1231 | { |
a3833dfe | 1232 | if (fd >= minfd) |
426b37ae JB |
1233 | return fd; |
1234 | else | |
1235 | { | |
cf237e27 AS |
1236 | int new; |
1237 | #ifdef F_DUPFD | |
1238 | new = fcntl (fd, F_DUPFD, minfd); | |
1239 | #else | |
1240 | new = dup (fd); | |
1241 | if (new != -1) | |
1242 | /* Note that we hold the original FD open while we recurse, | |
1243 | to guarantee we'll get a new FD if we need it. */ | |
1244 | new = relocate_fd (new, minfd); | |
1245 | #endif | |
426b37ae JB |
1246 | if (new == -1) |
1247 | { | |
a8fe7202 AS |
1248 | const char *message1 = "Error while setting up child: "; |
1249 | const char *errmessage = strerror (errno); | |
1250 | const char *message2 = "\n"; | |
68c45bf0 PE |
1251 | emacs_write (2, message1, strlen (message1)); |
1252 | emacs_write (2, errmessage, strlen (errmessage)); | |
1253 | emacs_write (2, message2, strlen (message2)); | |
426b37ae JB |
1254 | _exit (1); |
1255 | } | |
68c45bf0 | 1256 | emacs_close (fd); |
426b37ae JB |
1257 | return new; |
1258 | } | |
1259 | } | |
361358ea | 1260 | #endif /* not WINDOWSNT */ |
426b37ae | 1261 | |
012c6fcb | 1262 | static int |
a8fe7202 AS |
1263 | getenv_internal_1 (const char *var, int varlen, char **value, int *valuelen, |
1264 | Lisp_Object env) | |
012c6fcb | 1265 | { |
db699fc6 | 1266 | for (; CONSP (env); env = XCDR (env)) |
012c6fcb | 1267 | { |
db699fc6 | 1268 | Lisp_Object entry = XCAR (env); |
d50d3dc8 | 1269 | if (STRINGP (entry) |
db699fc6 | 1270 | && SBYTES (entry) >= varlen |
bad95d8f RS |
1271 | #ifdef WINDOWSNT |
1272 | /* NT environment variables are case insensitive. */ | |
d5db4077 | 1273 | && ! strnicmp (SDATA (entry), var, varlen) |
bad95d8f | 1274 | #else /* not WINDOWSNT */ |
72af86bd | 1275 | && ! memcmp (SDATA (entry), var, varlen) |
bad95d8f | 1276 | #endif /* not WINDOWSNT */ |
a9971c6d | 1277 | ) |
012c6fcb | 1278 | { |
db699fc6 SM |
1279 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') |
1280 | { | |
51b59d79 | 1281 | *value = SSDATA (entry) + (varlen + 1); |
db699fc6 SM |
1282 | *valuelen = SBYTES (entry) - (varlen + 1); |
1283 | return 1; | |
1284 | } | |
1285 | else if (SBYTES (entry) == varlen) | |
1286 | { | |
1287 | /* Lone variable names in Vprocess_environment mean that | |
1288 | variable should be removed from the environment. */ | |
1289 | *value = NULL; | |
1290 | return 1; | |
1291 | } | |
1292 | } | |
1293 | } | |
1294 | return 0; | |
1295 | } | |
1296 | ||
012c6fcb | 1297 | static int |
a8fe7202 AS |
1298 | getenv_internal (const char *var, int varlen, char **value, int *valuelen, |
1299 | Lisp_Object frame) | |
012c6fcb | 1300 | { |
d2bb6598 SM |
1301 | /* Try to find VAR in Vprocess_environment first. */ |
1302 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1303 | Vprocess_environment)) | |
1304 | return *value ? 1 : 0; | |
f105f403 | 1305 | |
d2bb6598 | 1306 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
de87fb59 | 1307 | if (strcmp (var, "DISPLAY") == 0) |
d2bb6598 SM |
1308 | { |
1309 | Lisp_Object display | |
1310 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); | |
1311 | if (STRINGP (display)) | |
1312 | { | |
51b59d79 | 1313 | *value = SSDATA (display); |
de87fb59 | 1314 | *valuelen = SBYTES (display); |
012c6fcb JA |
1315 | return 1; |
1316 | } | |
d2bb6598 SM |
1317 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
1318 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1319 | Vinitial_environment)) | |
1320 | return *value ? 1 : 0; | |
012c6fcb JA |
1321 | } |
1322 | ||
1323 | return 0; | |
1324 | } | |
1325 | ||
f105f403 | 1326 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
5990851d KL |
1327 | doc: /* Get the value of environment variable VARIABLE. |
1328 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
1329 | the environment. Otherwise, value is a string. | |
f105f403 | 1330 | |
acf20901 | 1331 | This function searches `process-environment' for VARIABLE. |
5990851d | 1332 | |
db699fc6 | 1333 | If optional parameter ENV is a list, then search this list instead of |
acf20901 JB |
1334 | `process-environment', and return t when encountering a negative entry |
1335 | \(an entry for a variable with no value). */) | |
5842a27b | 1336 | (Lisp_Object variable, Lisp_Object env) |
012c6fcb JA |
1337 | { |
1338 | char *value; | |
1339 | int valuelen; | |
1340 | ||
5990851d | 1341 | CHECK_STRING (variable); |
db699fc6 SM |
1342 | if (CONSP (env)) |
1343 | { | |
1344 | if (getenv_internal_1 (SDATA (variable), SBYTES (variable), | |
1345 | &value, &valuelen, env)) | |
1346 | return value ? make_string (value, valuelen) : Qt; | |
1347 | else | |
1348 | return Qnil; | |
1349 | } | |
1350 | else if (getenv_internal (SDATA (variable), SBYTES (variable), | |
d2bb6598 | 1351 | &value, &valuelen, env)) |
012c6fcb JA |
1352 | return make_string (value, valuelen); |
1353 | else | |
1354 | return Qnil; | |
1355 | } | |
1356 | ||
5990851d KL |
1357 | /* A version of getenv that consults the Lisp environment lists, |
1358 | easily callable from C. */ | |
012c6fcb | 1359 | char * |
a8fe7202 | 1360 | egetenv (const char *var) |
012c6fcb JA |
1361 | { |
1362 | char *value; | |
1363 | int valuelen; | |
1364 | ||
f105f403 | 1365 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
012c6fcb JA |
1366 | return value; |
1367 | else | |
1368 | return 0; | |
1369 | } | |
1370 | ||
80856e74 | 1371 | \f |
8de15d69 | 1372 | /* This is run before init_cmdargs. */ |
177c0ea7 | 1373 | |
dfcf069d | 1374 | void |
971de7fb | 1375 | init_callproc_1 (void) |
8de15d69 RS |
1376 | { |
1377 | char *data_dir = egetenv ("EMACSDATA"); | |
35a2f4b8 KH |
1378 | char *doc_dir = egetenv ("EMACSDOC"); |
1379 | ||
8de15d69 | 1380 | Vdata_directory |
177c0ea7 | 1381 | = Ffile_name_as_directory (build_string (data_dir ? data_dir |
8de15d69 | 1382 | : PATH_DATA)); |
35a2f4b8 KH |
1383 | Vdoc_directory |
1384 | = Ffile_name_as_directory (build_string (doc_dir ? doc_dir | |
1385 | : PATH_DOC)); | |
9453ea7b | 1386 | |
e576cab4 | 1387 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1388 | PATH_EXEC path from epaths.h. */ |
e576cab4 | 1389 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); |
80856e74 JB |
1390 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
1391 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
8de15d69 RS |
1392 | } |
1393 | ||
e17f7533 | 1394 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1395 | |
dfcf069d | 1396 | void |
971de7fb | 1397 | init_callproc (void) |
8de15d69 RS |
1398 | { |
1399 | char *data_dir = egetenv ("EMACSDATA"); | |
177c0ea7 | 1400 | |
8de15d69 RS |
1401 | register char * sh; |
1402 | Lisp_Object tempdir; | |
1403 | ||
9cc4fad5 | 1404 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1405 | { |
05630743 RS |
1406 | /* Add to the path the lib-src subdir of the installation dir. */ |
1407 | Lisp_Object tem; | |
1408 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1409 | Vinstallation_directory); | |
bad95d8f | 1410 | #ifndef DOS_NT |
1a6640ec | 1411 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc | 1412 | if (NILP (Fmember (tem, Vexec_path))) |
70ec1377 RS |
1413 | { |
1414 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); | |
1415 | Vexec_path = Fcons (tem, Vexec_path); | |
1416 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
1417 | } | |
177c0ea7 | 1418 | |
0fa248bc | 1419 | Vexec_directory = Ffile_name_as_directory (tem); |
bad95d8f | 1420 | #endif /* not DOS_NT */ |
8de15d69 | 1421 | |
e17f7533 RS |
1422 | /* Maybe use ../etc as well as ../lib-src. */ |
1423 | if (data_dir == 0) | |
1424 | { | |
1425 | tem = Fexpand_file_name (build_string ("etc"), | |
1426 | Vinstallation_directory); | |
1427 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1428 | } |
1429 | } | |
7e933683 RS |
1430 | |
1431 | /* Look for the files that should be in etc. We don't use | |
1432 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1433 | near the executable, and they are never in the build |
7e933683 RS |
1434 | directory when that's different from the source directory. |
1435 | ||
1436 | Instead, if these files are not in the nominal place, we try the | |
1437 | source directory. */ | |
1438 | if (data_dir == 0) | |
1439 | { | |
70ec1377 | 1440 | Lisp_Object tem, tem1, srcdir; |
7e933683 | 1441 | |
70ec1377 RS |
1442 | srcdir = Fexpand_file_name (build_string ("../src/"), |
1443 | build_string (PATH_DUMPLOADSEARCH)); | |
7e933683 RS |
1444 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); |
1445 | tem1 = Ffile_exists_p (tem); | |
70ec1377 | 1446 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
7e933683 | 1447 | { |
70ec1377 | 1448 | Lisp_Object newdir; |
7e933683 RS |
1449 | newdir = Fexpand_file_name (build_string ("../etc/"), |
1450 | build_string (PATH_DUMPLOADSEARCH)); | |
1451 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1452 | tem1 = Ffile_exists_p (tem); | |
1453 | if (!NILP (tem1)) | |
1454 | Vdata_directory = newdir; | |
1455 | } | |
1456 | } | |
80856e74 | 1457 | |
d883eb62 RS |
1458 | #ifndef CANNOT_DUMP |
1459 | if (initialized) | |
1460 | #endif | |
1461 | { | |
1462 | tempdir = Fdirectory_file_name (Vexec_directory); | |
d5db4077 | 1463 | if (access (SDATA (tempdir), 0) < 0) |
d883eb62 RS |
1464 | dir_warning ("Warning: arch-dependent data dir (%s) does not exist.\n", |
1465 | Vexec_directory); | |
1466 | } | |
80856e74 | 1467 | |
e576cab4 | 1468 | tempdir = Fdirectory_file_name (Vdata_directory); |
d5db4077 | 1469 | if (access (SDATA (tempdir), 0) < 0) |
76d5c6cf RS |
1470 | dir_warning ("Warning: arch-independent data dir (%s) does not exist.\n", |
1471 | Vdata_directory); | |
e576cab4 | 1472 | |
e576cab4 | 1473 | sh = (char *) getenv ("SHELL"); |
80856e74 | 1474 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
8abd035b | 1475 | |
40b49d4b JB |
1476 | #ifdef DOS_NT |
1477 | Vshared_game_score_directory = Qnil; | |
1478 | #else | |
63789758 RS |
1479 | Vshared_game_score_directory = build_string (PATH_GAME); |
1480 | if (NILP (Ffile_directory_p (Vshared_game_score_directory))) | |
1481 | Vshared_game_score_directory = Qnil; | |
40b49d4b | 1482 | #endif |
9fefd2ba JB |
1483 | } |
1484 | ||
dfcf069d | 1485 | void |
971de7fb | 1486 | set_initial_environment (void) |
9fefd2ba JB |
1487 | { |
1488 | register char **envp; | |
7bfa6d77 AS |
1489 | #ifdef CANNOT_DUMP |
1490 | Vprocess_environment = Qnil; | |
edfda783 | 1491 | #else |
7bfa6d77 | 1492 | if (initialized) |
edfda783 | 1493 | #endif |
7bfa6d77 | 1494 | { |
a13f8f50 | 1495 | for (envp = environ; *envp; envp++) |
de87fb59 DN |
1496 | Vprocess_environment = Fcons (build_string (*envp), |
1497 | Vprocess_environment); | |
3c33c79a SM |
1498 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent |
1499 | to use `delete' and friends on process-environment. */ | |
1500 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); | |
a13f8f50 | 1501 | } |
80856e74 JB |
1502 | } |
1503 | ||
dfcf069d | 1504 | void |
971de7fb | 1505 | syms_of_callproc (void) |
80856e74 | 1506 | { |
bad95d8f | 1507 | #ifdef DOS_NT |
dde990a0 | 1508 | Qbuffer_file_type = intern_c_string ("buffer-file-type"); |
093650fe | 1509 | staticpro (&Qbuffer_file_type); |
bad95d8f | 1510 | #endif /* DOS_NT */ |
7e6c2178 | 1511 | |
f92d51d8 CY |
1512 | #ifndef DOS_NT |
1513 | Vtemp_file_name_pattern = build_string ("emacsXXXXXX"); | |
1514 | #elif defined (WINDOWSNT) | |
1515 | Vtemp_file_name_pattern = build_string ("emXXXXXX"); | |
1516 | #else | |
1517 | Vtemp_file_name_pattern = build_string ("detmp.XXX"); | |
1518 | #endif | |
1519 | staticpro (&Vtemp_file_name_pattern); | |
1520 | ||
29208e82 | 1521 | DEFVAR_LISP ("shell-file-name", Vshell_file_name, |
fdb82f93 | 1522 | doc: /* *File name to load inferior shells from. |
b20b29be EZ |
1523 | Initialized from the SHELL environment variable, or to a system-dependent |
1524 | default if SHELL is not set. */); | |
80856e74 | 1525 | |
29208e82 | 1526 | DEFVAR_LISP ("exec-path", Vexec_path, |
fdb82f93 PJ |
1527 | doc: /* *List of directories to search programs to run in subprocesses. |
1528 | Each element is a string (directory name) or nil (try default directory). */); | |
80856e74 | 1529 | |
29208e82 | 1530 | DEFVAR_LISP ("exec-suffixes", Vexec_suffixes, |
fdb82f93 PJ |
1531 | doc: /* *List of suffixes to try to find executable file names. |
1532 | Each element is a string. */); | |
33d5af99 | 1533 | Vexec_suffixes = Qnil; |
b81a1b72 | 1534 | |
29208e82 | 1535 | DEFVAR_LISP ("exec-directory", Vexec_directory, |
fdb82f93 PJ |
1536 | doc: /* Directory for executables for Emacs to invoke. |
1537 | More generally, this includes any architecture-dependent files | |
1538 | that are built and installed from the Emacs distribution. */); | |
e576cab4 | 1539 | |
29208e82 | 1540 | DEFVAR_LISP ("data-directory", Vdata_directory, |
fdb82f93 PJ |
1541 | doc: /* Directory of machine-independent files that come with GNU Emacs. |
1542 | These are files intended for Emacs to use while it runs. */); | |
80856e74 | 1543 | |
29208e82 | 1544 | DEFVAR_LISP ("doc-directory", Vdoc_directory, |
fdb82f93 | 1545 | doc: /* Directory containing the DOC file that comes with GNU Emacs. |
ebf24b59 | 1546 | This is usually the same as `data-directory'. */); |
35a2f4b8 | 1547 | |
29208e82 | 1548 | DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory, |
fdb82f93 PJ |
1549 | doc: /* For internal use by the build procedure only. |
1550 | This is the name of the directory in which the build procedure installed | |
ebf24b59 | 1551 | Emacs's info files; the default value for `Info-default-directory-list' |
fdb82f93 | 1552 | includes this. */); |
ed61592a JB |
1553 | Vconfigure_info_directory = build_string (PATH_INFO); |
1554 | ||
29208e82 | 1555 | DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory, |
b065672a CW |
1556 | doc: /* Directory of score files for games which come with GNU Emacs. |
1557 | If this variable is nil, then Emacs is unable to use a shared directory. */); | |
40b49d4b JB |
1558 | #ifdef DOS_NT |
1559 | Vshared_game_score_directory = Qnil; | |
1560 | #else | |
63789758 | 1561 | Vshared_game_score_directory = build_string (PATH_GAME); |
40b49d4b | 1562 | #endif |
b065672a | 1563 | |
29208e82 | 1564 | DEFVAR_LISP ("initial-environment", Vinitial_environment, |
6b8e474c SM |
1565 | doc: /* List of environment variables inherited from the parent process. |
1566 | Each element should be a string of the form ENVVARNAME=VALUE. | |
1567 | The elements must normally be decoded (using `locale-coding-system') for use. */); | |
1568 | Vinitial_environment = Qnil; | |
1569 | ||
29208e82 | 1570 | DEFVAR_LISP ("process-environment", Vprocess_environment, |
5990851d | 1571 | doc: /* List of overridden environment variables for subprocesses to inherit. |
fdb82f93 | 1572 | Each element should be a string of the form ENVVARNAME=VALUE. |
5990851d | 1573 | |
a13f8f50 KL |
1574 | Entries in this list take precedence to those in the frame-local |
1575 | environments. Therefore, let-binding `process-environment' is an easy | |
1576 | way to temporarily change the value of an environment variable, | |
1577 | irrespective of where it comes from. To use `process-environment' to | |
1578 | remove an environment variable, include only its name in the list, | |
1579 | without "=VALUE". | |
5990851d KL |
1580 | |
1581 | This variable is set to nil when Emacs starts. | |
1582 | ||
fdb82f93 PJ |
1583 | If multiple entries define the same variable, the first one always |
1584 | takes precedence. | |
5990851d | 1585 | |
776a24a1 | 1586 | Non-ASCII characters are encoded according to the initial value of |
5990851d KL |
1587 | `locale-coding-system', i.e. the elements must normally be decoded for |
1588 | use. | |
1589 | ||
776a24a1 | 1590 | See `setenv' and `getenv'. */); |
86f5ca04 | 1591 | Vprocess_environment = Qnil; |
80856e74 | 1592 | |
80856e74 | 1593 | defsubr (&Scall_process); |
83fa009c | 1594 | defsubr (&Sgetenv_internal); |
e576cab4 | 1595 | defsubr (&Scall_process_region); |
80856e74 | 1596 | } |