Commit | Line | Data |
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80856e74 | 1 | /* Synchronous subprocess invocation for GNU Emacs. |
73b0cd50 | 2 | Copyright (C) 1985-1988, 1993-1995, 1999-2011 |
8cabe764 | 3 | Free Software Foundation, Inc. |
80856e74 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
80856e74 | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
80856e74 JB |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
80856e74 JB |
19 | |
20 | ||
68c45bf0 | 21 | #include <config.h> |
80856e74 | 22 | #include <signal.h> |
e576cab4 | 23 | #include <errno.h> |
565620a5 | 24 | #include <stdio.h> |
d7306fe6 | 25 | #include <setjmp.h> |
80856e74 | 26 | #include <sys/types.h> |
3cbd6585 | 27 | #include <unistd.h> |
3cbd6585 | 28 | |
80856e74 | 29 | #include <sys/file.h> |
80856e74 | 30 | #include <fcntl.h> |
80856e74 | 31 | |
bad95d8f RS |
32 | #ifdef WINDOWSNT |
33 | #define NOMINMAX | |
34 | #include <windows.h> | |
489f9371 | 35 | #include "w32.h" |
bad95d8f RS |
36 | #define _P_NOWAIT 1 /* from process.h */ |
37 | #endif | |
38 | ||
7e6c2178 | 39 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
7e6c2178 RS |
40 | #include <sys/stat.h> |
41 | #include <sys/param.h> | |
7e6c2178 RS |
42 | #endif /* MSDOS */ |
43 | ||
80856e74 JB |
44 | #include "lisp.h" |
45 | #include "commands.h" | |
46 | #include "buffer.h" | |
91183bfd | 47 | #include "character.h" |
edf496dd | 48 | #include "ccl.h" |
32d08644 | 49 | #include "coding.h" |
f0b950cf | 50 | #include "composite.h" |
57bda87a | 51 | #include <epaths.h> |
80856e74 | 52 | #include "process.h" |
d177f194 | 53 | #include "syssignal.h" |
a129418f | 54 | #include "systty.h" |
aba637ec | 55 | #include "blockinput.h" |
f105f403 KL |
56 | #include "frame.h" |
57 | #include "termhooks.h" | |
80856e74 | 58 | |
5f027cea EZ |
59 | #ifdef MSDOS |
60 | #include "msdos.h" | |
61 | #endif | |
62 | ||
03695ace | 63 | #ifndef USE_CRT_DLL |
80856e74 JB |
64 | extern char **environ; |
65 | #endif | |
66 | ||
f95c3f91 | 67 | #ifdef HAVE_SETPGID |
58eb6cf0 | 68 | #if !defined (USG) |
320695d8 | 69 | #undef setpgrp |
f95c3f91 GM |
70 | #define setpgrp setpgid |
71 | #endif | |
2b7e8799 | 72 | #endif |
f95c3f91 | 73 | |
f92d51d8 CY |
74 | /* Pattern used by call-process-region to make temp files. */ |
75 | static Lisp_Object Vtemp_file_name_pattern; | |
76 | ||
e0f24100 | 77 | /* True if we are about to fork off a synchronous process or if we |
80856e74 JB |
78 | are waiting for it. */ |
79 | int synch_process_alive; | |
80 | ||
81 | /* Nonzero => this is a string explaining death of synchronous subprocess. */ | |
42ca4633 | 82 | const char *synch_process_death; |
80856e74 | 83 | |
6b61353c KH |
84 | /* Nonzero => this is the signal number that terminated the subprocess. */ |
85 | int synch_process_termsig; | |
86 | ||
80856e74 JB |
87 | /* If synch_process_death is zero, |
88 | this is exit code of synchronous subprocess. */ | |
89 | int synch_process_retcode; | |
f105f403 | 90 | |
80856e74 | 91 | \f |
37d54121 RS |
92 | /* Clean up when exiting Fcall_process. |
93 | On MSDOS, delete the temporary file on any kind of termination. | |
94 | On Unix, kill the process and any children on termination by signal. */ | |
95 | ||
96 | /* Nonzero if this is termination due to exit. */ | |
97 | static int call_process_exited; | |
98 | ||
d2bb6598 SM |
99 | EXFUN (Fgetenv_internal, 2); |
100 | ||
d177f194 | 101 | static Lisp_Object |
971de7fb | 102 | call_process_kill (Lisp_Object fdpid) |
d177f194 | 103 | { |
68c45bf0 | 104 | emacs_close (XFASTINT (Fcar (fdpid))); |
d177f194 JB |
105 | EMACS_KILLPG (XFASTINT (Fcdr (fdpid)), SIGKILL); |
106 | synch_process_alive = 0; | |
107 | return Qnil; | |
108 | } | |
109 | ||
7710357c | 110 | static Lisp_Object |
971de7fb | 111 | call_process_cleanup (Lisp_Object arg) |
80856e74 | 112 | { |
ad3aaf33 AS |
113 | Lisp_Object fdpid = Fcdr (arg); |
114 | #if defined (MSDOS) | |
115 | Lisp_Object file; | |
116 | #else | |
117 | int pid; | |
118 | #endif | |
119 | ||
120 | Fset_buffer (Fcar (arg)); | |
121 | ||
e39a993c | 122 | #if defined (MSDOS) |
7e6c2178 | 123 | /* for MSDOS fdpid is really (fd . tempfile) */ |
c1350752 | 124 | file = Fcdr (fdpid); |
68c45bf0 | 125 | emacs_close (XFASTINT (Fcar (fdpid))); |
d5db4077 KR |
126 | if (strcmp (SDATA (file), NULL_DEVICE) != 0) |
127 | unlink (SDATA (file)); | |
e39a993c | 128 | #else /* not MSDOS */ |
ad3aaf33 | 129 | pid = XFASTINT (Fcdr (fdpid)); |
d177f194 | 130 | |
37d54121 | 131 | if (call_process_exited) |
6b6e798b | 132 | { |
68c45bf0 | 133 | emacs_close (XFASTINT (Fcar (fdpid))); |
6b6e798b RS |
134 | return Qnil; |
135 | } | |
37d54121 | 136 | |
d177f194 JB |
137 | if (EMACS_KILLPG (pid, SIGINT) == 0) |
138 | { | |
aed13378 | 139 | int count = SPECPDL_INDEX (); |
d177f194 JB |
140 | record_unwind_protect (call_process_kill, fdpid); |
141 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); | |
142 | immediate_quit = 1; | |
143 | QUIT; | |
144 | wait_for_termination (pid); | |
145 | immediate_quit = 0; | |
146 | specpdl_ptr = specpdl + count; /* Discard the unwind protect. */ | |
147 | message1 ("Waiting for process to die...done"); | |
148 | } | |
80856e74 | 149 | synch_process_alive = 0; |
68c45bf0 | 150 | emacs_close (XFASTINT (Fcar (fdpid))); |
7e6c2178 | 151 | #endif /* not MSDOS */ |
80856e74 JB |
152 | return Qnil; |
153 | } | |
154 | ||
155 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, | |
fdb82f93 PJ |
156 | doc: /* Call PROGRAM synchronously in separate process. |
157 | The remaining arguments are optional. | |
158 | The program's input comes from file INFILE (nil means `/dev/null'). | |
159 | Insert output in BUFFER before point; t means current buffer; | |
160 | nil for BUFFER means discard it; 0 means discard and don't wait. | |
161 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, | |
162 | REAL-BUFFER says what to do with standard output, as above, | |
163 | while STDERR-FILE says what to do with standard error in the child. | |
164 | STDERR-FILE may be nil (discard standard error output), | |
165 | t (mix it with ordinary output), or a file name string. | |
166 | ||
167 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
168 | Remaining arguments are strings passed as command arguments to PROGRAM. | |
169 | ||
a4feb144 RS |
170 | If executable PROGRAM can't be found as an executable, `call-process' |
171 | signals a Lisp error. `call-process' reports errors in execution of | |
172 | the program only through its return and output. | |
173 | ||
fdb82f93 PJ |
174 | If BUFFER is 0, `call-process' returns immediately with value nil. |
175 | Otherwise it waits for PROGRAM to terminate | |
176 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
177 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
178 | ||
179 | usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */) | |
c5101a77 | 180 | (size_t nargs, register Lisp_Object *args) |
80856e74 | 181 | { |
0aa2630f | 182 | Lisp_Object infile, buffer, current_dir, path; |
b9c7f648 | 183 | volatile int display_p_volatile; |
80856e74 JB |
184 | int fd[2]; |
185 | int filefd; | |
186 | register int pid; | |
4da256b1 KS |
187 | #define CALLPROC_BUFFER_SIZE_MIN (16 * 1024) |
188 | #define CALLPROC_BUFFER_SIZE_MAX (4 * CALLPROC_BUFFER_SIZE_MIN) | |
189 | char buf[CALLPROC_BUFFER_SIZE_MAX]; | |
190 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; | |
aed13378 | 191 | int count = SPECPDL_INDEX (); |
2d607244 | 192 | |
b9c7f648 | 193 | const unsigned char **volatile new_argv_volatile; |
1aa83b22 | 194 | register const unsigned char **new_argv; |
39eaa782 RS |
195 | /* File to use for stderr in the child. |
196 | t means use same as standard output. */ | |
197 | Lisp_Object error_file; | |
7e6c2178 RS |
198 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
199 | char *outf, *tempfile; | |
200 | int outfilefd; | |
80856e74 | 201 | #endif |
32d08644 KH |
202 | struct coding_system process_coding; /* coding-system of process output */ |
203 | struct coding_system argument_coding; /* coding-system of arguments */ | |
09494912 RS |
204 | /* Set to the return value of Ffind_operation_coding_system. */ |
205 | Lisp_Object coding_systems; | |
206 | ||
207 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ | |
208 | coding_systems = Qt; | |
32d08644 | 209 | |
b7826503 | 210 | CHECK_STRING (args[0]); |
80856e74 | 211 | |
39eaa782 RS |
212 | error_file = Qt; |
213 | ||
7e6c2178 RS |
214 | #ifndef subprocesses |
215 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
177c0ea7 | 216 | if (nargs >= 3 |
09ffb8b5 | 217 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
218 | error ("Operating system cannot handle asynchronous subprocesses"); |
219 | #endif /* subprocesses */ | |
220 | ||
09494912 | 221 | /* Decide the coding-system for giving arguments. */ |
32d08644 KH |
222 | { |
223 | Lisp_Object val, *args2; | |
c5101a77 | 224 | size_t i; |
32d08644 KH |
225 | |
226 | /* If arguments are supplied, we may have to encode them. */ | |
227 | if (nargs >= 5) | |
228 | { | |
30d57b8e | 229 | int must_encode = 0; |
6e50da0a | 230 | Lisp_Object coding_attrs; |
30d57b8e | 231 | |
e7c1c20e | 232 | for (i = 4; i < nargs; i++) |
b7826503 | 233 | CHECK_STRING (args[i]); |
e7c1c20e | 234 | |
a2286b5c | 235 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
236 | if (STRING_MULTIBYTE (args[i])) |
237 | must_encode = 1; | |
238 | ||
beacaab3 KH |
239 | if (!NILP (Vcoding_system_for_write)) |
240 | val = Vcoding_system_for_write; | |
30d57b8e | 241 | else if (! must_encode) |
fcaf8878 | 242 | val = Qraw_text; |
beacaab3 | 243 | else |
32d08644 KH |
244 | { |
245 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); | |
246 | args2[0] = Qcall_process; | |
247 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 248 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 249 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
32d08644 | 250 | } |
fcaf8878 | 251 | val = complement_process_encoding_system (val); |
32d08644 | 252 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); |
6e50da0a KH |
253 | coding_attrs = CODING_ID_ATTRS (argument_coding.id); |
254 | if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs))) | |
255 | { | |
256 | /* We should not use an ASCII incompatible coding system. */ | |
257 | val = raw_text_coding_system (val); | |
258 | setup_coding_system (val, &argument_coding); | |
259 | } | |
32d08644 | 260 | } |
32d08644 KH |
261 | } |
262 | ||
e576cab4 JB |
263 | if (nargs >= 2 && ! NILP (args[1])) |
264 | { | |
4b4deea2 | 265 | infile = Fexpand_file_name (args[1], BVAR (current_buffer, directory)); |
b7826503 | 266 | CHECK_STRING (infile); |
e576cab4 | 267 | } |
80856e74 | 268 | else |
5437e9f9 | 269 | infile = build_string (NULL_DEVICE); |
80856e74 | 270 | |
e576cab4 JB |
271 | if (nargs >= 3) |
272 | { | |
39eaa782 RS |
273 | buffer = args[2]; |
274 | ||
275 | /* If BUFFER is a list, its meaning is | |
276 | (BUFFER-FOR-STDOUT FILE-FOR-STDERR). */ | |
277 | if (CONSP (buffer)) | |
278 | { | |
70949dac | 279 | if (CONSP (XCDR (buffer))) |
45be8a1e | 280 | { |
a9d4f28a | 281 | Lisp_Object stderr_file; |
70949dac | 282 | stderr_file = XCAR (XCDR (buffer)); |
45be8a1e RS |
283 | |
284 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
285 | error_file = stderr_file; | |
286 | else | |
287 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
288 | } | |
289 | ||
70949dac | 290 | buffer = XCAR (buffer); |
39eaa782 | 291 | } |
044512ed | 292 | |
39eaa782 RS |
293 | if (!(EQ (buffer, Qnil) |
294 | || EQ (buffer, Qt) | |
3ffde7d6 | 295 | || INTEGERP (buffer))) |
e576cab4 | 296 | { |
39eaa782 RS |
297 | Lisp_Object spec_buffer; |
298 | spec_buffer = buffer; | |
50fe359b | 299 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
300 | /* Mention the buffer name for a better error message. */ |
301 | if (NILP (buffer)) | |
b7826503 PJ |
302 | CHECK_BUFFER (spec_buffer); |
303 | CHECK_BUFFER (buffer); | |
e576cab4 JB |
304 | } |
305 | } | |
177c0ea7 | 306 | else |
e576cab4 | 307 | buffer = Qnil; |
80856e74 | 308 | |
58616e67 JB |
309 | /* Make sure that the child will be able to chdir to the current |
310 | buffer's current directory, or its unhandled equivalent. We | |
311 | can't just have the child check for an error when it does the | |
312 | chdir, since it's in a vfork. | |
313 | ||
314 | We have to GCPRO around this because Fexpand_file_name, | |
315 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
316 | might call a file name handling function. The argument list is | |
317 | protected by the caller, so all we really have to worry about is | |
318 | buffer. */ | |
319 | { | |
34b87689 | 320 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
58616e67 | 321 | |
4b4deea2 | 322 | current_dir = BVAR (current_buffer, directory); |
58616e67 | 323 | |
34b87689 | 324 | GCPRO4 (infile, buffer, current_dir, error_file); |
58616e67 | 325 | |
ca319910 SM |
326 | current_dir = Funhandled_file_name_directory (current_dir); |
327 | if (NILP (current_dir)) | |
328 | /* If the file name handler says that current_dir is unreachable, use | |
329 | a sensible default. */ | |
330 | current_dir = build_string ("~/"); | |
331 | current_dir = expand_and_dir_to_file (current_dir, Qnil); | |
db8454b0 CY |
332 | current_dir = Ffile_name_as_directory (current_dir); |
333 | ||
58616e67 JB |
334 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
335 | report_file_error ("Setting current directory", | |
4b4deea2 | 336 | Fcons (BVAR (current_buffer, directory), Qnil)); |
58616e67 | 337 | |
34b87689 KH |
338 | if (STRING_MULTIBYTE (infile)) |
339 | infile = ENCODE_FILE (infile); | |
340 | if (STRING_MULTIBYTE (current_dir)) | |
341 | current_dir = ENCODE_FILE (current_dir); | |
342 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) | |
343 | error_file = ENCODE_FILE (error_file); | |
58616e67 JB |
344 | UNGCPRO; |
345 | } | |
346 | ||
b9c7f648 | 347 | display_p_volatile = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
80856e74 | 348 | |
42a5b22f | 349 | filefd = emacs_open (SSDATA (infile), O_RDONLY, 0); |
80856e74 JB |
350 | if (filefd < 0) |
351 | { | |
34b87689 | 352 | infile = DECODE_FILE (infile); |
e576cab4 | 353 | report_file_error ("Opening process input file", Fcons (infile, Qnil)); |
80856e74 JB |
354 | } |
355 | /* Search for program; barf if not found. */ | |
c52b0b34 | 356 | { |
ad3aaf33 | 357 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
c52b0b34 | 358 | |
ad3aaf33 | 359 | GCPRO4 (infile, buffer, current_dir, error_file); |
5c150961 | 360 | openp (Vexec_path, args[0], Vexec_suffixes, &path, make_number (X_OK)); |
c52b0b34 KH |
361 | UNGCPRO; |
362 | } | |
012c6fcb | 363 | if (NILP (path)) |
80856e74 | 364 | { |
68c45bf0 | 365 | emacs_close (filefd); |
80856e74 JB |
366 | report_file_error ("Searching for program", Fcons (args[0], Qnil)); |
367 | } | |
8ee8f447 RS |
368 | |
369 | /* If program file name starts with /: for quoting a magic name, | |
370 | discard that. */ | |
371 | if (SBYTES (path) > 2 && SREF (path, 0) == '/' | |
372 | && SREF (path, 1) == ':') | |
373 | path = Fsubstring (path, make_number (2), Qnil); | |
374 | ||
b9c7f648 | 375 | new_argv_volatile = new_argv = (const unsigned char **) |
c5101a77 | 376 | alloca ((nargs > 4 ? nargs - 2 : 2) * sizeof (char *)); |
c364e618 KH |
377 | if (nargs > 4) |
378 | { | |
c5101a77 | 379 | register size_t i; |
ad3aaf33 | 380 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
c364e618 | 381 | |
ad3aaf33 | 382 | GCPRO5 (infile, buffer, current_dir, path, error_file); |
c5bfa12b KH |
383 | argument_coding.dst_multibyte = 0; |
384 | for (i = 4; i < nargs; i++) | |
c364e618 | 385 | { |
c5bfa12b KH |
386 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); |
387 | if (CODING_REQUIRE_ENCODING (&argument_coding)) | |
91183bfd KH |
388 | /* We must encode this argument. */ |
389 | args[i] = encode_coding_string (&argument_coding, args[i], 1); | |
c364e618 | 390 | } |
c5bfa12b | 391 | UNGCPRO; |
1aa83b22 AS |
392 | for (i = 4; i < nargs; i++) |
393 | new_argv[i - 3] = SDATA (args[i]); | |
394 | new_argv[i - 3] = 0; | |
c364e618 | 395 | } |
db54baaa KH |
396 | else |
397 | new_argv[1] = 0; | |
1aa83b22 | 398 | new_argv[0] = SDATA (path); |
80856e74 | 399 | |
7e6c2178 | 400 | #ifdef MSDOS /* MW, July 1993 */ |
8a52365c | 401 | if ((outf = egetenv ("TMPDIR"))) |
7e6c2178 RS |
402 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); |
403 | else | |
404 | { | |
405 | tempfile = alloca (20); | |
406 | *tempfile = '\0'; | |
407 | } | |
408 | dostounix_filename (tempfile); | |
177c0ea7 | 409 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') |
7e6c2178 RS |
410 | strcat (tempfile, "/"); |
411 | strcat (tempfile, "detmp.XXX"); | |
412 | mktemp (tempfile); | |
413 | ||
414 | outfilefd = creat (tempfile, S_IREAD | S_IWRITE); | |
415 | if (outfilefd < 0) | |
416 | { | |
68c45bf0 | 417 | emacs_close (filefd); |
6f89d28a MB |
418 | report_file_error ("Opening process output file", |
419 | Fcons (build_string (tempfile), Qnil)); | |
7e6c2178 | 420 | } |
6f89d28a | 421 | fd[0] = filefd; |
2610078a | 422 | fd[1] = outfilefd; |
6f89d28a | 423 | #endif /* MSDOS */ |
7e6c2178 | 424 | |
d50d3dc8 | 425 | if (INTEGERP (buffer)) |
68c45bf0 | 426 | fd[1] = emacs_open (NULL_DEVICE, O_WRONLY, 0), fd[0] = -1; |
80856e74 JB |
427 | else |
428 | { | |
7e6c2178 | 429 | #ifndef MSDOS |
db92b288 GM |
430 | errno = 0; |
431 | if (pipe (fd) == -1) | |
432 | { | |
433 | emacs_close (filefd); | |
434 | report_file_error ("Creating process pipe", Qnil); | |
435 | } | |
80856e74 JB |
436 | #endif |
437 | } | |
438 | ||
439 | { | |
440 | /* child_setup must clobber environ in systems with true vfork. | |
441 | Protect it from permanent change. */ | |
442 | register char **save_environ = environ; | |
443 | register int fd1 = fd[1]; | |
39eaa782 | 444 | int fd_error = fd1; |
c0ad4ea5 AS |
445 | #ifdef HAVE_WORKING_VFORK |
446 | sigset_t procmask; | |
447 | sigset_t blocked; | |
448 | struct sigaction sigpipe_action; | |
449 | #endif | |
80856e74 JB |
450 | |
451 | #if 0 /* Some systems don't have sigblock. */ | |
e065a56e | 452 | mask = sigblock (sigmask (SIGCHLD)); |
80856e74 JB |
453 | #endif |
454 | ||
455 | /* Record that we're about to create a synchronous process. */ | |
456 | synch_process_alive = 1; | |
457 | ||
5c03767e RS |
458 | /* These vars record information from process termination. |
459 | Clear them now before process can possibly terminate, | |
460 | to avoid timing error if process terminates soon. */ | |
461 | synch_process_death = 0; | |
462 | synch_process_retcode = 0; | |
6b61353c | 463 | synch_process_termsig = 0; |
5c03767e | 464 | |
39eaa782 | 465 | if (NILP (error_file)) |
68c45bf0 | 466 | fd_error = emacs_open (NULL_DEVICE, O_WRONLY, 0); |
39eaa782 RS |
467 | else if (STRINGP (error_file)) |
468 | { | |
469 | #ifdef DOS_NT | |
42a5b22f | 470 | fd_error = emacs_open (SSDATA (error_file), |
68c45bf0 PE |
471 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, |
472 | S_IREAD | S_IWRITE); | |
39eaa782 | 473 | #else /* not DOS_NT */ |
42a5b22f | 474 | fd_error = creat (SSDATA (error_file), 0666); |
39eaa782 RS |
475 | #endif /* not DOS_NT */ |
476 | } | |
477 | ||
478 | if (fd_error < 0) | |
479 | { | |
68c45bf0 | 480 | emacs_close (filefd); |
6f89d28a | 481 | if (fd[0] != filefd) |
68c45bf0 | 482 | emacs_close (fd[0]); |
39eaa782 | 483 | if (fd1 >= 0) |
68c45bf0 | 484 | emacs_close (fd1); |
6f89d28a MB |
485 | #ifdef MSDOS |
486 | unlink (tempfile); | |
487 | #endif | |
34b87689 KH |
488 | if (NILP (error_file)) |
489 | error_file = build_string (NULL_DEVICE); | |
490 | else if (STRINGP (error_file)) | |
491 | error_file = DECODE_FILE (error_file); | |
492 | report_file_error ("Cannot redirect stderr", Fcons (error_file, Qnil)); | |
39eaa782 | 493 | } |
89e1ec1d | 494 | |
2610078a | 495 | #ifdef MSDOS /* MW, July 1993 */ |
c17c4250 | 496 | /* Note that on MSDOS `child_setup' actually returns the child process |
2610078a KH |
497 | exit status, not its PID, so we assign it to `synch_process_retcode' |
498 | below. */ | |
c17c4250 EZ |
499 | pid = child_setup (filefd, outfilefd, fd_error, (char **) new_argv, |
500 | 0, current_dir); | |
39eaa782 | 501 | |
2610078a KH |
502 | /* Record that the synchronous process exited and note its |
503 | termination status. */ | |
504 | synch_process_alive = 0; | |
505 | synch_process_retcode = pid; | |
506 | if (synch_process_retcode < 0) /* means it couldn't be exec'ed */ | |
68c45bf0 | 507 | { |
ca9c0567 | 508 | synchronize_system_messages_locale (); |
68c45bf0 PE |
509 | synch_process_death = strerror (errno); |
510 | } | |
2610078a | 511 | |
68c45bf0 | 512 | emacs_close (outfilefd); |
2610078a | 513 | if (fd_error != outfilefd) |
68c45bf0 | 514 | emacs_close (fd_error); |
2610078a | 515 | fd1 = -1; /* No harm in closing that one! */ |
32d08644 KH |
516 | /* Since CRLF is converted to LF within `decode_coding', we can |
517 | always open a file with binary mode. */ | |
68c45bf0 | 518 | fd[0] = emacs_open (tempfile, O_RDONLY | O_BINARY, 0); |
2610078a KH |
519 | if (fd[0] < 0) |
520 | { | |
521 | unlink (tempfile); | |
68c45bf0 | 522 | emacs_close (filefd); |
2610078a KH |
523 | report_file_error ("Cannot re-open temporary file", Qnil); |
524 | } | |
525 | #else /* not MSDOS */ | |
bad95d8f | 526 | #ifdef WINDOWSNT |
2d607244 RS |
527 | pid = child_setup (filefd, fd1, fd_error, (char **) new_argv, |
528 | 0, current_dir); | |
bad95d8f | 529 | #else /* not WINDOWSNT */ |
c0ad4ea5 AS |
530 | |
531 | #ifdef HAVE_WORKING_VFORK | |
532 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', | |
533 | this sets the parent's signal handlers as well as the child's. | |
534 | So delay all interrupts whose handlers the child might munge, | |
535 | and record the current handlers so they can be restored later. */ | |
536 | sigemptyset (&blocked); | |
537 | sigaddset (&blocked, SIGPIPE); | |
538 | sigaction (SIGPIPE, 0, &sigpipe_action); | |
539 | sigprocmask (SIG_BLOCK, &blocked, &procmask); | |
540 | #endif | |
541 | ||
aba637ec KS |
542 | BLOCK_INPUT; |
543 | ||
80856e74 JB |
544 | pid = vfork (); |
545 | ||
b9c7f648 PE |
546 | new_argv = new_argv_volatile; |
547 | ||
80856e74 JB |
548 | if (pid == 0) |
549 | { | |
550 | if (fd[0] >= 0) | |
68c45bf0 | 551 | emacs_close (fd[0]); |
1e7963c7 RS |
552 | #ifdef HAVE_SETSID |
553 | setsid (); | |
554 | #endif | |
58eb6cf0 | 555 | #if defined (USG) |
80856e74 JB |
556 | setpgrp (); |
557 | #else | |
558 | setpgrp (pid, pid); | |
559 | #endif /* USG */ | |
c0ad4ea5 | 560 | |
2f9a22e2 | 561 | /* GConf causes us to ignore SIGPIPE, make sure it is restored |
c0ad4ea5 | 562 | in the child. */ |
2f9a22e2 | 563 | //signal (SIGPIPE, SIG_DFL); |
c0ad4ea5 AS |
564 | #ifdef HAVE_WORKING_VFORK |
565 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
566 | #endif | |
567 | ||
2d607244 RS |
568 | child_setup (filefd, fd1, fd_error, (char **) new_argv, |
569 | 0, current_dir); | |
80856e74 | 570 | } |
aba637ec KS |
571 | |
572 | UNBLOCK_INPUT; | |
c0ad4ea5 AS |
573 | |
574 | #ifdef HAVE_WORKING_VFORK | |
575 | /* Restore the signal state. */ | |
576 | sigaction (SIGPIPE, &sigpipe_action, 0); | |
577 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
578 | #endif | |
579 | ||
bad95d8f | 580 | #endif /* not WINDOWSNT */ |
cd5f8f60 RS |
581 | |
582 | /* The MSDOS case did this already. */ | |
583 | if (fd_error >= 0) | |
68c45bf0 | 584 | emacs_close (fd_error); |
2610078a | 585 | #endif /* not MSDOS */ |
80856e74 | 586 | |
80856e74 JB |
587 | environ = save_environ; |
588 | ||
6b6e798b RS |
589 | /* Close most of our fd's, but not fd[0] |
590 | since we will use that to read input from. */ | |
68c45bf0 | 591 | emacs_close (filefd); |
799abb26 | 592 | if (fd1 >= 0 && fd1 != fd_error) |
68c45bf0 | 593 | emacs_close (fd1); |
80856e74 JB |
594 | } |
595 | ||
596 | if (pid < 0) | |
597 | { | |
6b6e798b | 598 | if (fd[0] >= 0) |
68c45bf0 | 599 | emacs_close (fd[0]); |
80856e74 JB |
600 | report_file_error ("Doing vfork", Qnil); |
601 | } | |
602 | ||
d50d3dc8 | 603 | if (INTEGERP (buffer)) |
80856e74 | 604 | { |
6b6e798b | 605 | if (fd[0] >= 0) |
68c45bf0 | 606 | emacs_close (fd[0]); |
80856e74 JB |
607 | return Qnil; |
608 | } | |
609 | ||
6b6e798b | 610 | /* Enable sending signal if user quits below. */ |
37d54121 RS |
611 | call_process_exited = 0; |
612 | ||
e39a993c | 613 | #if defined(MSDOS) |
7e6c2178 RS |
614 | /* MSDOS needs different cleanup information. */ |
615 | record_unwind_protect (call_process_cleanup, | |
ad3aaf33 AS |
616 | Fcons (Fcurrent_buffer (), |
617 | Fcons (make_number (fd[0]), | |
618 | build_string (tempfile)))); | |
7e6c2178 | 619 | #else |
80856e74 | 620 | record_unwind_protect (call_process_cleanup, |
ad3aaf33 AS |
621 | Fcons (Fcurrent_buffer (), |
622 | Fcons (make_number (fd[0]), make_number (pid)))); | |
e39a993c | 623 | #endif /* not MSDOS */ |
80856e74 JB |
624 | |
625 | ||
d50d3dc8 | 626 | if (BUFFERP (buffer)) |
80856e74 JB |
627 | Fset_buffer (buffer); |
628 | ||
09494912 RS |
629 | if (NILP (buffer)) |
630 | { | |
631 | /* If BUFFER is nil, we must read process output once and then | |
632 | discard it, so setup coding system but with nil. */ | |
633 | setup_coding_system (Qnil, &process_coding); | |
634 | } | |
635 | else | |
636 | { | |
637 | Lisp_Object val, *args2; | |
638 | ||
639 | val = Qnil; | |
640 | if (!NILP (Vcoding_system_for_read)) | |
641 | val = Vcoding_system_for_read; | |
642 | else | |
643 | { | |
644 | if (EQ (coding_systems, Qt)) | |
645 | { | |
c5101a77 | 646 | size_t i; |
09494912 RS |
647 | |
648 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); | |
649 | args2[0] = Qcall_process; | |
650 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
651 | coding_systems | |
652 | = Ffind_operation_coding_system (nargs + 1, args2); | |
653 | } | |
654 | if (CONSP (coding_systems)) | |
70949dac | 655 | val = XCAR (coding_systems); |
09494912 | 656 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 657 | val = XCAR (Vdefault_process_coding_system); |
09494912 RS |
658 | else |
659 | val = Qnil; | |
660 | } | |
91183bfd | 661 | Fcheck_coding_system (val); |
09494912 RS |
662 | /* In unibyte mode, character code conversion should not take |
663 | place but EOL conversion should. So, setup raw-text or one | |
664 | of the subsidiary according to the information just setup. */ | |
4b4deea2 | 665 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
09494912 | 666 | && !NILP (val)) |
91183bfd KH |
667 | val = raw_text_coding_system (val); |
668 | setup_coding_system (val, &process_coding); | |
09494912 RS |
669 | } |
670 | ||
80856e74 JB |
671 | immediate_quit = 1; |
672 | QUIT; | |
673 | ||
674 | { | |
69481da7 | 675 | register EMACS_INT nread; |
0ad477db | 676 | int first = 1; |
69481da7 | 677 | EMACS_INT total_read = 0; |
321fecde | 678 | int carryover = 0; |
b9c7f648 | 679 | int display_p = display_p_volatile; |
0aa2630f | 680 | int display_on_the_fly = display_p; |
05b44e90 KH |
681 | struct coding_system saved_coding; |
682 | ||
683 | saved_coding = process_coding; | |
60558b19 | 684 | while (1) |
80856e74 | 685 | { |
60558b19 RS |
686 | /* Repeatedly read until we've filled as much as possible |
687 | of the buffer size we have. But don't read | |
8e6208c5 | 688 | less than 1024--save that for the next bufferful. */ |
321fecde | 689 | nread = carryover; |
60558b19 | 690 | while (nread < bufsize - 1024) |
00fb3e95 | 691 | { |
4da256b1 | 692 | int this_read = emacs_read (fd[0], buf + nread, |
68c45bf0 | 693 | bufsize - nread); |
60558b19 RS |
694 | |
695 | if (this_read < 0) | |
696 | goto give_up; | |
697 | ||
698 | if (this_read == 0) | |
7a7ab107 KH |
699 | { |
700 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
701 | break; | |
702 | } | |
60558b19 RS |
703 | |
704 | nread += this_read; | |
7a7ab107 | 705 | total_read += this_read; |
60558b19 | 706 | |
7a7ab107 KH |
707 | if (display_on_the_fly) |
708 | break; | |
709 | } | |
60558b19 RS |
710 | |
711 | /* Now NREAD is the total amount of data in the buffer. */ | |
80856e74 | 712 | immediate_quit = 0; |
177c0ea7 | 713 | |
012c6fcb | 714 | if (!NILP (buffer)) |
32d08644 | 715 | { |
4b4deea2 | 716 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
bb4a3884 | 717 | && ! CODING_MAY_REQUIRE_DECODING (&process_coding)) |
4da256b1 | 718 | insert_1_both (buf, nread, nread, 0, 1, 0); |
32d08644 KH |
719 | else |
720 | { /* We have to decode the input. */ | |
45d60801 | 721 | Lisp_Object curbuf; |
71a0c011 | 722 | int count1 = SPECPDL_INDEX (); |
177c0ea7 | 723 | |
45d60801 | 724 | XSETBUFFER (curbuf, current_buffer); |
71a0c011 EZ |
725 | /* We cannot allow after-change-functions be run |
726 | during decoding, because that might modify the | |
727 | buffer, while we rely on process_coding.produced to | |
728 | faithfully reflect inserted text until we | |
729 | TEMP_SET_PT_BOTH below. */ | |
730 | specbind (Qinhibit_modification_hooks, Qt); | |
0ca76b1e PE |
731 | decode_coding_c_string (&process_coding, (unsigned char *) buf, |
732 | nread, curbuf); | |
71a0c011 | 733 | unbind_to (count1, Qnil); |
7a7ab107 | 734 | if (display_on_the_fly |
91183bfd KH |
735 | && CODING_REQUIRE_DETECTION (&saved_coding) |
736 | && ! CODING_REQUIRE_DETECTION (&process_coding)) | |
7a7ab107 KH |
737 | { |
738 | /* We have detected some coding system. But, | |
739 | there's a possibility that the detection was | |
740 | done by insufficient data. So, we give up | |
741 | displaying on the fly. */ | |
91183bfd KH |
742 | if (process_coding.produced > 0) |
743 | del_range_2 (process_coding.dst_pos, | |
744 | process_coding.dst_pos_byte, | |
745 | process_coding.dst_pos | |
746 | + process_coding.produced_char, | |
747 | process_coding.dst_pos_byte | |
748 | + process_coding.produced, 0); | |
7a7ab107 KH |
749 | display_on_the_fly = 0; |
750 | process_coding = saved_coding; | |
751 | carryover = nread; | |
0aa2630f KS |
752 | /* This is to make the above condition always |
753 | fails in the future. */ | |
21d0467f KH |
754 | saved_coding.common_flags |
755 | &= ~CODING_REQUIRE_DETECTION_MASK; | |
7a7ab107 KH |
756 | continue; |
757 | } | |
177c0ea7 | 758 | |
ea99bcc1 KH |
759 | TEMP_SET_PT_BOTH (PT + process_coding.produced_char, |
760 | PT_BYTE + process_coding.produced); | |
54ab3d3b | 761 | carryover = process_coding.carryover_bytes; |
321fecde | 762 | if (carryover > 0) |
72af86bd AS |
763 | memcpy (buf, process_coding.carryover, |
764 | process_coding.carryover_bytes); | |
32d08644 KH |
765 | } |
766 | } | |
c5bfa12b | 767 | |
321fecde | 768 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
c5bfa12b | 769 | break; |
6e3bfbb2 RS |
770 | |
771 | /* Make the buffer bigger as we continue to read more data, | |
4da256b1 KS |
772 | but not past CALLPROC_BUFFER_SIZE_MAX. */ |
773 | if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) | |
774 | if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) | |
775 | bufsize = CALLPROC_BUFFER_SIZE_MAX; | |
6e3bfbb2 | 776 | |
0aa2630f | 777 | if (display_p) |
0ad477db RS |
778 | { |
779 | if (first) | |
780 | prepare_menu_bars (); | |
781 | first = 0; | |
3007ebfb | 782 | redisplay_preserve_echo_area (1); |
0aa2630f KS |
783 | /* This variable might have been set to 0 for code |
784 | detection. In that case, we set it back to 1 because | |
785 | we should have already detected a coding system. */ | |
786 | display_on_the_fly = 1; | |
0ad477db | 787 | } |
80856e74 JB |
788 | immediate_quit = 1; |
789 | QUIT; | |
790 | } | |
60558b19 | 791 | give_up: ; |
80856e74 | 792 | |
91183bfd KH |
793 | Vlast_coding_system_used = CODING_ID_NAME (process_coding.id); |
794 | /* If the caller required, let the buffer inherit the | |
795 | coding-system used to decode the process output. */ | |
796 | if (inherit_process_coding_system) | |
797 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
ad3aaf33 | 798 | make_number (total_read)); |
3b440bb5 EZ |
799 | } |
800 | ||
77defa9a | 801 | #ifndef MSDOS |
80856e74 JB |
802 | /* Wait for it to terminate, unless it already has. */ |
803 | wait_for_termination (pid); | |
77defa9a | 804 | #endif |
80856e74 JB |
805 | |
806 | immediate_quit = 0; | |
807 | ||
37d54121 RS |
808 | /* Don't kill any children that the subprocess may have left behind |
809 | when exiting. */ | |
810 | call_process_exited = 1; | |
811 | ||
80856e74 JB |
812 | unbind_to (count, Qnil); |
813 | ||
6b61353c KH |
814 | if (synch_process_termsig) |
815 | { | |
42ca4633 | 816 | const char *signame; |
6b61353c KH |
817 | |
818 | synchronize_system_messages_locale (); | |
819 | signame = strsignal (synch_process_termsig); | |
820 | ||
821 | if (signame == 0) | |
822 | signame = "unknown"; | |
823 | ||
824 | synch_process_death = signame; | |
825 | } | |
826 | ||
80856e74 | 827 | if (synch_process_death) |
68c45bf0 PE |
828 | return code_convert_string_norecord (build_string (synch_process_death), |
829 | Vlocale_coding_system, 0); | |
80856e74 JB |
830 | return make_number (synch_process_retcode); |
831 | } | |
80856e74 | 832 | \f |
9fefd2ba | 833 | static Lisp_Object |
971de7fb | 834 | delete_temp_file (Lisp_Object name) |
80856e74 | 835 | { |
1a271e14 KR |
836 | /* Suppress jka-compr handling, etc. */ |
837 | int count = SPECPDL_INDEX (); | |
838 | specbind (intern ("file-name-handler-alist"), Qnil); | |
f1a5d776 | 839 | internal_delete_file (name); |
1a271e14 | 840 | unbind_to (count, Qnil); |
320695d8 | 841 | return Qnil; |
80856e74 JB |
842 | } |
843 | ||
844 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
fdb82f93 PJ |
845 | 3, MANY, 0, |
846 | doc: /* Send text from START to END to a synchronous process running PROGRAM. | |
847 | The remaining arguments are optional. | |
848 | Delete the text if fourth arg DELETE is non-nil. | |
849 | ||
850 | Insert output in BUFFER before point; t means current buffer; | |
851 | nil for BUFFER means discard it; 0 means discard and don't wait. | |
852 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, | |
853 | REAL-BUFFER says what to do with standard output, as above, | |
854 | while STDERR-FILE says what to do with standard error in the child. | |
855 | STDERR-FILE may be nil (discard standard error output), | |
856 | t (mix it with ordinary output), or a file name string. | |
857 | ||
858 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
859 | Remaining args are passed to PROGRAM at startup as command args. | |
860 | ||
ba9a5174 | 861 | If BUFFER is 0, `call-process-region' returns immediately with value nil. |
fdb82f93 PJ |
862 | Otherwise it waits for PROGRAM to terminate |
863 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
864 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
865 | ||
866 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) | |
c5101a77 | 867 | (size_t nargs, register Lisp_Object *args) |
80856e74 | 868 | { |
39323a7e KH |
869 | struct gcpro gcpro1; |
870 | Lisp_Object filename_string; | |
871 | register Lisp_Object start, end; | |
aed13378 | 872 | int count = SPECPDL_INDEX (); |
08ee4e87 | 873 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
09494912 | 874 | Lisp_Object coding_systems; |
32d08644 | 875 | Lisp_Object val, *args2; |
c5101a77 | 876 | size_t i; |
7e6c2178 | 877 | char *tempfile; |
f92d51d8 | 878 | Lisp_Object tmpdir, pattern; |
7e6c2178 | 879 | |
f92d51d8 CY |
880 | if (STRINGP (Vtemporary_file_directory)) |
881 | tmpdir = Vtemporary_file_directory; | |
7e6c2178 RS |
882 | else |
883 | { | |
f92d51d8 CY |
884 | #ifndef DOS_NT |
885 | if (getenv ("TMPDIR")) | |
886 | tmpdir = build_string (getenv ("TMPDIR")); | |
887 | else | |
888 | tmpdir = build_string ("/tmp/"); | |
889 | #else /* DOS_NT */ | |
890 | char *outf; | |
891 | if ((outf = egetenv ("TMPDIR")) | |
892 | || (outf = egetenv ("TMP")) | |
893 | || (outf = egetenv ("TEMP"))) | |
894 | tmpdir = build_string (outf); | |
895 | else | |
896 | tmpdir = Ffile_name_as_directory (build_string ("c:/temp")); | |
0774fcf8 | 897 | #endif |
f92d51d8 | 898 | } |
7e6c2178 | 899 | |
f92d51d8 CY |
900 | pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir); |
901 | tempfile = (char *) alloca (SBYTES (pattern) + 1); | |
72af86bd | 902 | memcpy (tempfile, SDATA (pattern), SBYTES (pattern) + 1); |
09494912 RS |
903 | coding_systems = Qt; |
904 | ||
1ddc85a4 DL |
905 | #ifdef HAVE_MKSTEMP |
906 | { | |
d277f1f7 YM |
907 | int fd; |
908 | ||
909 | BLOCK_INPUT; | |
910 | fd = mkstemp (tempfile); | |
911 | UNBLOCK_INPUT; | |
1ddc85a4 DL |
912 | if (fd == -1) |
913 | report_file_error ("Failed to open temporary file", | |
914 | Fcons (Vtemp_file_name_pattern, Qnil)); | |
915 | else | |
916 | close (fd); | |
917 | } | |
918 | #else | |
80856e74 | 919 | mktemp (tempfile); |
1ddc85a4 | 920 | #endif |
80856e74 JB |
921 | |
922 | filename_string = build_string (tempfile); | |
39323a7e | 923 | GCPRO1 (filename_string); |
80856e74 JB |
924 | start = args[0]; |
925 | end = args[1]; | |
32d08644 | 926 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
927 | if (!NILP (Vcoding_system_for_write)) |
928 | val = Vcoding_system_for_write; | |
4b4deea2 | 929 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
fcaf8878 | 930 | val = Qraw_text; |
32d08644 | 931 | else |
beacaab3 | 932 | { |
91489411 RS |
933 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); |
934 | args2[0] = Qcall_process_region; | |
935 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
936 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); | |
fcaf8878 | 937 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
beacaab3 | 938 | } |
fcaf8878 | 939 | val = complement_process_encoding_system (val); |
32d08644 | 940 | |
168afdaa | 941 | { |
aed13378 | 942 | int count1 = SPECPDL_INDEX (); |
168afdaa RS |
943 | |
944 | specbind (intern ("coding-system-for-write"), val); | |
bb951f0e KR |
945 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
946 | happen to get a ".Z" suffix. */ | |
947 | specbind (intern ("file-name-handler-alist"), Qnil); | |
168afdaa RS |
948 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil); |
949 | ||
950 | unbind_to (count1, Qnil); | |
951 | } | |
91489411 | 952 | |
177c0ea7 | 953 | /* Note that Fcall_process takes care of binding |
91489411 | 954 | coding-system-for-read. */ |
093650fe | 955 | |
80856e74 JB |
956 | record_unwind_protect (delete_temp_file, filename_string); |
957 | ||
edf496dd | 958 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
959 | Fdelete_region (start, end); |
960 | ||
edf496dd KH |
961 | if (nargs > 3) |
962 | { | |
963 | args += 2; | |
964 | nargs -= 2; | |
965 | } | |
966 | else | |
967 | { | |
968 | args[0] = args[2]; | |
969 | nargs = 2; | |
970 | } | |
971 | args[1] = filename_string; | |
80856e74 | 972 | |
edf496dd | 973 | RETURN_UNGCPRO (unbind_to (count, Fcall_process (nargs, args))); |
80856e74 JB |
974 | } |
975 | \f | |
361358ea | 976 | #ifndef WINDOWSNT |
971de7fb | 977 | static int relocate_fd (int fd, int minfd); |
361358ea | 978 | #endif |
dfcf069d | 979 | |
5990851d KL |
980 | static char ** |
981 | add_env (char **env, char **new_env, char *string) | |
982 | { | |
983 | char **ep; | |
984 | int ok = 1; | |
985 | if (string == NULL) | |
986 | return new_env; | |
987 | ||
988 | /* See if this string duplicates any string already in the env. | |
989 | If so, don't put it in. | |
990 | When an env var has multiple definitions, | |
991 | we keep the definition that comes first in process-environment. */ | |
992 | for (ep = env; ok && ep != new_env; ep++) | |
993 | { | |
994 | char *p = *ep, *q = string; | |
995 | while (ok) | |
996 | { | |
997 | if (*q != *p) | |
998 | break; | |
999 | if (*q == 0) | |
1000 | /* The string is a lone variable name; keep it for now, we | |
1001 | will remove it later. It is a placeholder for a | |
1002 | variable that is not to be included in the environment. */ | |
1003 | break; | |
1004 | if (*q == '=') | |
1005 | ok = 0; | |
1006 | p++, q++; | |
1007 | } | |
1008 | } | |
1009 | if (ok) | |
1010 | *new_env++ = string; | |
1011 | return new_env; | |
1012 | } | |
1013 | ||
80856e74 JB |
1014 | /* This is the last thing run in a newly forked inferior |
1015 | either synchronous or asynchronous. | |
1016 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
1017 | Initialize inferior's priority, pgrp, connected dir and environment. | |
1018 | then exec another program based on new_argv. | |
1019 | ||
1020 | This function may change environ for the superior process. | |
1021 | Therefore, the superior process must save and restore the value | |
1022 | of environ around the vfork and the call to this function. | |
1023 | ||
80856e74 | 1024 | SET_PGRP is nonzero if we should put the subprocess into a separate |
177c0ea7 | 1025 | process group. |
e576cab4 JB |
1026 | |
1027 | CURRENT_DIR is an elisp string giving the path of the current | |
1028 | directory the subprocess should have. Since we can't really signal | |
1029 | a decent error from within the child, this should be verified as an | |
1030 | executable directory by the parent. */ | |
80856e74 | 1031 | |
dfcf069d | 1032 | int |
971de7fb | 1033 | child_setup (int in, int out, int err, register char **new_argv, int set_pgrp, Lisp_Object current_dir) |
80856e74 | 1034 | { |
e576cab4 | 1035 | char **env; |
7fcf7f05 | 1036 | char *pwd_var; |
bad95d8f RS |
1037 | #ifdef WINDOWSNT |
1038 | int cpid; | |
4252a4bd | 1039 | HANDLE handles[3]; |
bad95d8f | 1040 | #endif /* WINDOWSNT */ |
e576cab4 | 1041 | |
33abe2d9 | 1042 | int pid = getpid (); |
80856e74 | 1043 | |
80856e74 JB |
1044 | /* Close Emacs's descriptors that this process should not have. */ |
1045 | close_process_descs (); | |
ded80a25 | 1046 | |
c17c4250 EZ |
1047 | /* DOS_NT isn't in a vfork, so if we are in the middle of load-file, |
1048 | we will lose if we call close_load_descs here. */ | |
1049 | #ifndef DOS_NT | |
4458cebe | 1050 | close_load_descs (); |
c17c4250 | 1051 | #endif |
80856e74 JB |
1052 | |
1053 | /* Note that use of alloca is always safe here. It's obvious for systems | |
1054 | that do not have true vfork or that have true (stack) alloca. | |
caa01fe0 GM |
1055 | If using vfork and C_ALLOCA (when Emacs used to include |
1056 | src/alloca.c) it is safe because that changes the superior's | |
1057 | static variables as if the superior had done alloca and will be | |
1058 | cleaned up in the usual way. */ | |
e576cab4 | 1059 | { |
7fcf7f05 | 1060 | register char *temp; |
e576cab4 | 1061 | register int i; |
77d78be1 | 1062 | |
d5db4077 | 1063 | i = SBYTES (current_dir); |
16425c4a EZ |
1064 | #ifdef MSDOS |
1065 | /* MSDOS must have all environment variables malloc'ed, because | |
1066 | low-level libc functions that launch subsidiary processes rely | |
1067 | on that. */ | |
1068 | pwd_var = (char *) xmalloc (i + 6); | |
1069 | #else | |
7fcf7f05 | 1070 | pwd_var = (char *) alloca (i + 6); |
16425c4a | 1071 | #endif |
7fcf7f05 | 1072 | temp = pwd_var + 4; |
72af86bd AS |
1073 | memcpy (pwd_var, "PWD=", 4); |
1074 | memcpy (temp, SDATA (current_dir), i); | |
bad95d8f | 1075 | if (!IS_DIRECTORY_SEP (temp[i - 1])) temp[i++] = DIRECTORY_SEP; |
e576cab4 JB |
1076 | temp[i] = 0; |
1077 | ||
c17c4250 | 1078 | #ifndef DOS_NT |
e576cab4 JB |
1079 | /* We can't signal an Elisp error here; we're in a vfork. Since |
1080 | the callers check the current directory before forking, this | |
1081 | should only return an error if the directory's permissions | |
1082 | are changed between the check and this chdir, but we should | |
1083 | at least check. */ | |
1084 | if (chdir (temp) < 0) | |
20b25e46 | 1085 | _exit (errno); |
f8d23104 | 1086 | #else /* DOS_NT */ |
c17c4250 EZ |
1087 | /* Get past the drive letter, so that d:/ is left alone. */ |
1088 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
1089 | { | |
1090 | temp += 2; | |
1091 | i -= 2; | |
1092 | } | |
f8d23104 | 1093 | #endif /* DOS_NT */ |
c17c4250 | 1094 | |
7fcf7f05 | 1095 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 1096 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 1097 | temp[--i] = 0; |
e576cab4 | 1098 | } |
80856e74 | 1099 | |
5990851d | 1100 | /* Set `env' to a vector of the strings in the environment. */ |
80856e74 JB |
1101 | { |
1102 | register Lisp_Object tem; | |
1103 | register char **new_env; | |
5990851d | 1104 | char **p, **q; |
80856e74 | 1105 | register int new_length; |
d2bb6598 | 1106 | Lisp_Object display = Qnil; |
361358ea | 1107 | |
80856e74 | 1108 | new_length = 0; |
f105f403 | 1109 | |
80856e74 | 1110 | for (tem = Vprocess_environment; |
5990851d KL |
1111 | CONSP (tem) && STRINGP (XCAR (tem)); |
1112 | tem = XCDR (tem)) | |
d2bb6598 | 1113 | { |
42a5b22f | 1114 | if (strncmp (SSDATA (XCAR (tem)), "DISPLAY", 7) == 0 |
d2bb6598 SM |
1115 | && (SDATA (XCAR (tem)) [7] == '\0' |
1116 | || SDATA (XCAR (tem)) [7] == '=')) | |
1117 | /* DISPLAY is specified in process-environment. */ | |
1118 | display = Qt; | |
1119 | new_length++; | |
1120 | } | |
de87fb59 | 1121 | |
d2bb6598 SM |
1122 | /* If not provided yet, use the frame's DISPLAY. */ |
1123 | if (NILP (display)) | |
1124 | { | |
1125 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); | |
1126 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) | |
1127 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1128 | tmp = Fgetenv_internal (build_string ("DISPLAY"), | |
1129 | Vinitial_environment); | |
1130 | if (STRINGP (tmp)) | |
1131 | { | |
1132 | display = tmp; | |
1133 | new_length++; | |
1134 | } | |
1135 | } | |
80856e74 | 1136 | |
7fcf7f05 RS |
1137 | /* new_length + 2 to include PWD and terminating 0. */ |
1138 | env = new_env = (char **) alloca ((new_length + 2) * sizeof (char *)); | |
7fcf7f05 RS |
1139 | /* If we have a PWD envvar, pass one down, |
1140 | but with corrected value. */ | |
a13f8f50 | 1141 | if (egetenv ("PWD")) |
7fcf7f05 | 1142 | *new_env++ = pwd_var; |
361358ea | 1143 | |
6b8e474c | 1144 | if (STRINGP (display)) |
de87fb59 | 1145 | { |
42a5b22f | 1146 | int vlen = strlen ("DISPLAY=") + strlen (SSDATA (display)) + 1; |
de87fb59 DN |
1147 | char *vdata = (char *) alloca (vlen); |
1148 | strcpy (vdata, "DISPLAY="); | |
42a5b22f | 1149 | strcat (vdata, SSDATA (display)); |
de87fb59 DN |
1150 | new_env = add_env (env, new_env, vdata); |
1151 | } | |
80856e74 | 1152 | |
5990851d | 1153 | /* Overrides. */ |
80856e74 | 1154 | for (tem = Vprocess_environment; |
70949dac KR |
1155 | CONSP (tem) && STRINGP (XCAR (tem)); |
1156 | tem = XCDR (tem)) | |
42a5b22f | 1157 | new_env = add_env (env, new_env, SSDATA (XCAR (tem))); |
d2bb6598 | 1158 | |
5990851d KL |
1159 | *new_env = 0; |
1160 | ||
1161 | /* Remove variable names without values. */ | |
1162 | p = q = env; | |
1163 | while (*p != 0) | |
cd9565ba | 1164 | { |
5990851d | 1165 | while (*q != 0 && strchr (*q, '=') == NULL) |
1baf6db9 | 1166 | q++; |
5990851d KL |
1167 | *p = *q++; |
1168 | if (*p != 0) | |
1169 | p++; | |
cd9565ba | 1170 | } |
80856e74 | 1171 | } |
de87fb59 | 1172 | |
361358ea | 1173 | |
bad95d8f RS |
1174 | #ifdef WINDOWSNT |
1175 | prepare_standard_handles (in, out, err, handles); | |
d5db4077 | 1176 | set_process_dir (SDATA (current_dir)); |
67802943 DN |
1177 | /* Spawn the child. (See ntproc.c:Spawnve). */ |
1178 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); | |
1179 | reset_standard_handles (in, out, err, handles); | |
1180 | if (cpid == -1) | |
1181 | /* An error occurred while trying to spawn the process. */ | |
1182 | report_file_error ("Spawning child process", Qnil); | |
1183 | return cpid; | |
1184 | ||
bad95d8f | 1185 | #else /* not WINDOWSNT */ |
426b37ae JB |
1186 | /* Make sure that in, out, and err are not actually already in |
1187 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1188 | started with its standard in, out, or error closed, as might |
426b37ae | 1189 | happen under X. */ |
f29f9e4a RS |
1190 | { |
1191 | int oin = in, oout = out; | |
1192 | ||
1193 | /* We have to avoid relocating the same descriptor twice! */ | |
1194 | ||
1195 | in = relocate_fd (in, 3); | |
1196 | ||
1197 | if (out == oin) | |
1198 | out = in; | |
1199 | else | |
3e9367e7 | 1200 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1201 | |
1202 | if (err == oin) | |
1203 | err = in; | |
1204 | else if (err == oout) | |
1205 | err = out; | |
1206 | else | |
3e9367e7 | 1207 | err = relocate_fd (err, 3); |
f29f9e4a | 1208 | } |
426b37ae | 1209 | |
c17c4250 | 1210 | #ifndef MSDOS |
68c45bf0 PE |
1211 | emacs_close (0); |
1212 | emacs_close (1); | |
1213 | emacs_close (2); | |
80856e74 JB |
1214 | |
1215 | dup2 (in, 0); | |
1216 | dup2 (out, 1); | |
1217 | dup2 (err, 2); | |
68c45bf0 | 1218 | emacs_close (in); |
ce8f5a9a AS |
1219 | if (out != in) |
1220 | emacs_close (out); | |
1221 | if (err != in && err != out) | |
1222 | emacs_close (err); | |
80856e74 | 1223 | |
58eb6cf0 | 1224 | #if defined(USG) |
fdba8590 | 1225 | #ifndef SETPGRP_RELEASES_CTTY |
e576cab4 | 1226 | setpgrp (); /* No arguments but equivalent in this case */ |
fdba8590 | 1227 | #endif |
67802943 | 1228 | #else /* not USG */ |
e576cab4 | 1229 | setpgrp (pid, pid); |
67802943 | 1230 | #endif /* not USG */ |
80856e74 | 1231 | |
a7ebc409 | 1232 | /* setpgrp_of_tty is incorrect here; it uses input_fd. */ |
12e610e8 | 1233 | tcsetpgrp (0, pid); |
a7ebc409 | 1234 | |
80856e74 JB |
1235 | /* execvp does not accept an environment arg so the only way |
1236 | to pass this environment is to set environ. Our caller | |
1237 | is responsible for restoring the ambient value of environ. */ | |
1238 | environ = env; | |
1239 | execvp (new_argv[0], new_argv); | |
1240 | ||
68c45bf0 PE |
1241 | emacs_write (1, "Can't exec program: ", 20); |
1242 | emacs_write (1, new_argv[0], strlen (new_argv[0])); | |
1243 | emacs_write (1, "\n", 1); | |
80856e74 | 1244 | _exit (1); |
67802943 DN |
1245 | |
1246 | #else /* MSDOS */ | |
1247 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
1248 | xfree (pwd_var); | |
1249 | if (pid == -1) | |
1250 | /* An error occurred while trying to run the subprocess. */ | |
1251 | report_file_error ("Spawning child process", Qnil); | |
1252 | return pid; | |
1253 | #endif /* MSDOS */ | |
ae76d9e1 | 1254 | #endif /* not WINDOWSNT */ |
80856e74 JB |
1255 | } |
1256 | ||
361358ea | 1257 | #ifndef WINDOWSNT |
a3833dfe | 1258 | /* Move the file descriptor FD so that its number is not less than MINFD. |
426b37ae | 1259 | If the file descriptor is moved at all, the original is freed. */ |
dfcf069d | 1260 | static int |
971de7fb | 1261 | relocate_fd (int fd, int minfd) |
426b37ae | 1262 | { |
a3833dfe | 1263 | if (fd >= minfd) |
426b37ae JB |
1264 | return fd; |
1265 | else | |
1266 | { | |
cf237e27 AS |
1267 | int new; |
1268 | #ifdef F_DUPFD | |
1269 | new = fcntl (fd, F_DUPFD, minfd); | |
1270 | #else | |
1271 | new = dup (fd); | |
1272 | if (new != -1) | |
1273 | /* Note that we hold the original FD open while we recurse, | |
1274 | to guarantee we'll get a new FD if we need it. */ | |
1275 | new = relocate_fd (new, minfd); | |
1276 | #endif | |
426b37ae JB |
1277 | if (new == -1) |
1278 | { | |
cb1d0ef7 | 1279 | const char *message_1 = "Error while setting up child: "; |
a8fe7202 | 1280 | const char *errmessage = strerror (errno); |
cb1d0ef7 PE |
1281 | const char *message_2 = "\n"; |
1282 | emacs_write (2, message_1, strlen (message_1)); | |
68c45bf0 | 1283 | emacs_write (2, errmessage, strlen (errmessage)); |
cb1d0ef7 | 1284 | emacs_write (2, message_2, strlen (message_2)); |
426b37ae JB |
1285 | _exit (1); |
1286 | } | |
68c45bf0 | 1287 | emacs_close (fd); |
426b37ae JB |
1288 | return new; |
1289 | } | |
1290 | } | |
361358ea | 1291 | #endif /* not WINDOWSNT */ |
426b37ae | 1292 | |
012c6fcb | 1293 | static int |
a8fe7202 AS |
1294 | getenv_internal_1 (const char *var, int varlen, char **value, int *valuelen, |
1295 | Lisp_Object env) | |
012c6fcb | 1296 | { |
db699fc6 | 1297 | for (; CONSP (env); env = XCDR (env)) |
012c6fcb | 1298 | { |
db699fc6 | 1299 | Lisp_Object entry = XCAR (env); |
d50d3dc8 | 1300 | if (STRINGP (entry) |
db699fc6 | 1301 | && SBYTES (entry) >= varlen |
bad95d8f RS |
1302 | #ifdef WINDOWSNT |
1303 | /* NT environment variables are case insensitive. */ | |
d5db4077 | 1304 | && ! strnicmp (SDATA (entry), var, varlen) |
bad95d8f | 1305 | #else /* not WINDOWSNT */ |
72af86bd | 1306 | && ! memcmp (SDATA (entry), var, varlen) |
bad95d8f | 1307 | #endif /* not WINDOWSNT */ |
a9971c6d | 1308 | ) |
012c6fcb | 1309 | { |
db699fc6 SM |
1310 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') |
1311 | { | |
51b59d79 | 1312 | *value = SSDATA (entry) + (varlen + 1); |
db699fc6 SM |
1313 | *valuelen = SBYTES (entry) - (varlen + 1); |
1314 | return 1; | |
1315 | } | |
1316 | else if (SBYTES (entry) == varlen) | |
1317 | { | |
1318 | /* Lone variable names in Vprocess_environment mean that | |
1319 | variable should be removed from the environment. */ | |
1320 | *value = NULL; | |
1321 | return 1; | |
1322 | } | |
1323 | } | |
1324 | } | |
1325 | return 0; | |
1326 | } | |
1327 | ||
012c6fcb | 1328 | static int |
a8fe7202 AS |
1329 | getenv_internal (const char *var, int varlen, char **value, int *valuelen, |
1330 | Lisp_Object frame) | |
012c6fcb | 1331 | { |
d2bb6598 SM |
1332 | /* Try to find VAR in Vprocess_environment first. */ |
1333 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1334 | Vprocess_environment)) | |
1335 | return *value ? 1 : 0; | |
f105f403 | 1336 | |
d2bb6598 | 1337 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
de87fb59 | 1338 | if (strcmp (var, "DISPLAY") == 0) |
d2bb6598 SM |
1339 | { |
1340 | Lisp_Object display | |
1341 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); | |
1342 | if (STRINGP (display)) | |
1343 | { | |
51b59d79 | 1344 | *value = SSDATA (display); |
de87fb59 | 1345 | *valuelen = SBYTES (display); |
012c6fcb JA |
1346 | return 1; |
1347 | } | |
d2bb6598 SM |
1348 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
1349 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1350 | Vinitial_environment)) | |
1351 | return *value ? 1 : 0; | |
012c6fcb JA |
1352 | } |
1353 | ||
1354 | return 0; | |
1355 | } | |
1356 | ||
f105f403 | 1357 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
5990851d KL |
1358 | doc: /* Get the value of environment variable VARIABLE. |
1359 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
1360 | the environment. Otherwise, value is a string. | |
f105f403 | 1361 | |
acf20901 | 1362 | This function searches `process-environment' for VARIABLE. |
5990851d | 1363 | |
db699fc6 | 1364 | If optional parameter ENV is a list, then search this list instead of |
acf20901 JB |
1365 | `process-environment', and return t when encountering a negative entry |
1366 | \(an entry for a variable with no value). */) | |
5842a27b | 1367 | (Lisp_Object variable, Lisp_Object env) |
012c6fcb JA |
1368 | { |
1369 | char *value; | |
1370 | int valuelen; | |
1371 | ||
5990851d | 1372 | CHECK_STRING (variable); |
db699fc6 SM |
1373 | if (CONSP (env)) |
1374 | { | |
42a5b22f | 1375 | if (getenv_internal_1 (SSDATA (variable), SBYTES (variable), |
db699fc6 SM |
1376 | &value, &valuelen, env)) |
1377 | return value ? make_string (value, valuelen) : Qt; | |
1378 | else | |
1379 | return Qnil; | |
1380 | } | |
42a5b22f | 1381 | else if (getenv_internal (SSDATA (variable), SBYTES (variable), |
d2bb6598 | 1382 | &value, &valuelen, env)) |
012c6fcb JA |
1383 | return make_string (value, valuelen); |
1384 | else | |
1385 | return Qnil; | |
1386 | } | |
1387 | ||
5990851d KL |
1388 | /* A version of getenv that consults the Lisp environment lists, |
1389 | easily callable from C. */ | |
012c6fcb | 1390 | char * |
a8fe7202 | 1391 | egetenv (const char *var) |
012c6fcb JA |
1392 | { |
1393 | char *value; | |
1394 | int valuelen; | |
1395 | ||
f105f403 | 1396 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
012c6fcb JA |
1397 | return value; |
1398 | else | |
1399 | return 0; | |
1400 | } | |
1401 | ||
80856e74 | 1402 | \f |
8de15d69 | 1403 | /* This is run before init_cmdargs. */ |
177c0ea7 | 1404 | |
dfcf069d | 1405 | void |
971de7fb | 1406 | init_callproc_1 (void) |
8de15d69 RS |
1407 | { |
1408 | char *data_dir = egetenv ("EMACSDATA"); | |
35a2f4b8 KH |
1409 | char *doc_dir = egetenv ("EMACSDOC"); |
1410 | ||
8de15d69 | 1411 | Vdata_directory |
177c0ea7 | 1412 | = Ffile_name_as_directory (build_string (data_dir ? data_dir |
8de15d69 | 1413 | : PATH_DATA)); |
35a2f4b8 KH |
1414 | Vdoc_directory |
1415 | = Ffile_name_as_directory (build_string (doc_dir ? doc_dir | |
1416 | : PATH_DOC)); | |
9453ea7b | 1417 | |
e576cab4 | 1418 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1419 | PATH_EXEC path from epaths.h. */ |
e576cab4 | 1420 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); |
80856e74 JB |
1421 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
1422 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
8de15d69 RS |
1423 | } |
1424 | ||
e17f7533 | 1425 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1426 | |
dfcf069d | 1427 | void |
971de7fb | 1428 | init_callproc (void) |
8de15d69 RS |
1429 | { |
1430 | char *data_dir = egetenv ("EMACSDATA"); | |
177c0ea7 | 1431 | |
8de15d69 RS |
1432 | register char * sh; |
1433 | Lisp_Object tempdir; | |
1434 | ||
9cc4fad5 | 1435 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1436 | { |
05630743 RS |
1437 | /* Add to the path the lib-src subdir of the installation dir. */ |
1438 | Lisp_Object tem; | |
1439 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1440 | Vinstallation_directory); | |
bad95d8f | 1441 | #ifndef DOS_NT |
1a6640ec | 1442 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc | 1443 | if (NILP (Fmember (tem, Vexec_path))) |
70ec1377 RS |
1444 | { |
1445 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); | |
1446 | Vexec_path = Fcons (tem, Vexec_path); | |
1447 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
1448 | } | |
177c0ea7 | 1449 | |
0fa248bc | 1450 | Vexec_directory = Ffile_name_as_directory (tem); |
bad95d8f | 1451 | #endif /* not DOS_NT */ |
8de15d69 | 1452 | |
e17f7533 RS |
1453 | /* Maybe use ../etc as well as ../lib-src. */ |
1454 | if (data_dir == 0) | |
1455 | { | |
1456 | tem = Fexpand_file_name (build_string ("etc"), | |
1457 | Vinstallation_directory); | |
1458 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1459 | } |
1460 | } | |
7e933683 RS |
1461 | |
1462 | /* Look for the files that should be in etc. We don't use | |
1463 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1464 | near the executable, and they are never in the build |
7e933683 RS |
1465 | directory when that's different from the source directory. |
1466 | ||
1467 | Instead, if these files are not in the nominal place, we try the | |
1468 | source directory. */ | |
1469 | if (data_dir == 0) | |
1470 | { | |
70ec1377 | 1471 | Lisp_Object tem, tem1, srcdir; |
7e933683 | 1472 | |
70ec1377 RS |
1473 | srcdir = Fexpand_file_name (build_string ("../src/"), |
1474 | build_string (PATH_DUMPLOADSEARCH)); | |
7e933683 RS |
1475 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); |
1476 | tem1 = Ffile_exists_p (tem); | |
70ec1377 | 1477 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
7e933683 | 1478 | { |
70ec1377 | 1479 | Lisp_Object newdir; |
7e933683 RS |
1480 | newdir = Fexpand_file_name (build_string ("../etc/"), |
1481 | build_string (PATH_DUMPLOADSEARCH)); | |
1482 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1483 | tem1 = Ffile_exists_p (tem); | |
1484 | if (!NILP (tem1)) | |
1485 | Vdata_directory = newdir; | |
1486 | } | |
1487 | } | |
80856e74 | 1488 | |
d883eb62 RS |
1489 | #ifndef CANNOT_DUMP |
1490 | if (initialized) | |
1491 | #endif | |
1492 | { | |
1493 | tempdir = Fdirectory_file_name (Vexec_directory); | |
42a5b22f | 1494 | if (access (SSDATA (tempdir), 0) < 0) |
d883eb62 RS |
1495 | dir_warning ("Warning: arch-dependent data dir (%s) does not exist.\n", |
1496 | Vexec_directory); | |
1497 | } | |
80856e74 | 1498 | |
e576cab4 | 1499 | tempdir = Fdirectory_file_name (Vdata_directory); |
42a5b22f | 1500 | if (access (SSDATA (tempdir), 0) < 0) |
76d5c6cf RS |
1501 | dir_warning ("Warning: arch-independent data dir (%s) does not exist.\n", |
1502 | Vdata_directory); | |
e576cab4 | 1503 | |
e576cab4 | 1504 | sh = (char *) getenv ("SHELL"); |
80856e74 | 1505 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
8abd035b | 1506 | |
40b49d4b JB |
1507 | #ifdef DOS_NT |
1508 | Vshared_game_score_directory = Qnil; | |
1509 | #else | |
63789758 RS |
1510 | Vshared_game_score_directory = build_string (PATH_GAME); |
1511 | if (NILP (Ffile_directory_p (Vshared_game_score_directory))) | |
1512 | Vshared_game_score_directory = Qnil; | |
40b49d4b | 1513 | #endif |
9fefd2ba JB |
1514 | } |
1515 | ||
dfcf069d | 1516 | void |
971de7fb | 1517 | set_initial_environment (void) |
9fefd2ba JB |
1518 | { |
1519 | register char **envp; | |
7bfa6d77 AS |
1520 | #ifdef CANNOT_DUMP |
1521 | Vprocess_environment = Qnil; | |
edfda783 | 1522 | #else |
7bfa6d77 | 1523 | if (initialized) |
edfda783 | 1524 | #endif |
7bfa6d77 | 1525 | { |
a13f8f50 | 1526 | for (envp = environ; *envp; envp++) |
de87fb59 DN |
1527 | Vprocess_environment = Fcons (build_string (*envp), |
1528 | Vprocess_environment); | |
3c33c79a SM |
1529 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent |
1530 | to use `delete' and friends on process-environment. */ | |
1531 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); | |
a13f8f50 | 1532 | } |
80856e74 JB |
1533 | } |
1534 | ||
dfcf069d | 1535 | void |
971de7fb | 1536 | syms_of_callproc (void) |
80856e74 | 1537 | { |
f92d51d8 CY |
1538 | #ifndef DOS_NT |
1539 | Vtemp_file_name_pattern = build_string ("emacsXXXXXX"); | |
1540 | #elif defined (WINDOWSNT) | |
1541 | Vtemp_file_name_pattern = build_string ("emXXXXXX"); | |
1542 | #else | |
1543 | Vtemp_file_name_pattern = build_string ("detmp.XXX"); | |
1544 | #endif | |
1545 | staticpro (&Vtemp_file_name_pattern); | |
1546 | ||
29208e82 | 1547 | DEFVAR_LISP ("shell-file-name", Vshell_file_name, |
fdb82f93 | 1548 | doc: /* *File name to load inferior shells from. |
b20b29be EZ |
1549 | Initialized from the SHELL environment variable, or to a system-dependent |
1550 | default if SHELL is not set. */); | |
80856e74 | 1551 | |
29208e82 | 1552 | DEFVAR_LISP ("exec-path", Vexec_path, |
fdb82f93 PJ |
1553 | doc: /* *List of directories to search programs to run in subprocesses. |
1554 | Each element is a string (directory name) or nil (try default directory). */); | |
80856e74 | 1555 | |
29208e82 | 1556 | DEFVAR_LISP ("exec-suffixes", Vexec_suffixes, |
fdb82f93 PJ |
1557 | doc: /* *List of suffixes to try to find executable file names. |
1558 | Each element is a string. */); | |
33d5af99 | 1559 | Vexec_suffixes = Qnil; |
b81a1b72 | 1560 | |
29208e82 | 1561 | DEFVAR_LISP ("exec-directory", Vexec_directory, |
fdb82f93 PJ |
1562 | doc: /* Directory for executables for Emacs to invoke. |
1563 | More generally, this includes any architecture-dependent files | |
1564 | that are built and installed from the Emacs distribution. */); | |
e576cab4 | 1565 | |
29208e82 | 1566 | DEFVAR_LISP ("data-directory", Vdata_directory, |
fdb82f93 PJ |
1567 | doc: /* Directory of machine-independent files that come with GNU Emacs. |
1568 | These are files intended for Emacs to use while it runs. */); | |
80856e74 | 1569 | |
29208e82 | 1570 | DEFVAR_LISP ("doc-directory", Vdoc_directory, |
fdb82f93 | 1571 | doc: /* Directory containing the DOC file that comes with GNU Emacs. |
ebf24b59 | 1572 | This is usually the same as `data-directory'. */); |
35a2f4b8 | 1573 | |
29208e82 | 1574 | DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory, |
fdb82f93 PJ |
1575 | doc: /* For internal use by the build procedure only. |
1576 | This is the name of the directory in which the build procedure installed | |
ebf24b59 | 1577 | Emacs's info files; the default value for `Info-default-directory-list' |
fdb82f93 | 1578 | includes this. */); |
ed61592a JB |
1579 | Vconfigure_info_directory = build_string (PATH_INFO); |
1580 | ||
29208e82 | 1581 | DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory, |
b065672a CW |
1582 | doc: /* Directory of score files for games which come with GNU Emacs. |
1583 | If this variable is nil, then Emacs is unable to use a shared directory. */); | |
40b49d4b JB |
1584 | #ifdef DOS_NT |
1585 | Vshared_game_score_directory = Qnil; | |
1586 | #else | |
63789758 | 1587 | Vshared_game_score_directory = build_string (PATH_GAME); |
40b49d4b | 1588 | #endif |
b065672a | 1589 | |
29208e82 | 1590 | DEFVAR_LISP ("initial-environment", Vinitial_environment, |
6b8e474c SM |
1591 | doc: /* List of environment variables inherited from the parent process. |
1592 | Each element should be a string of the form ENVVARNAME=VALUE. | |
1593 | The elements must normally be decoded (using `locale-coding-system') for use. */); | |
1594 | Vinitial_environment = Qnil; | |
1595 | ||
29208e82 | 1596 | DEFVAR_LISP ("process-environment", Vprocess_environment, |
5990851d | 1597 | doc: /* List of overridden environment variables for subprocesses to inherit. |
fdb82f93 | 1598 | Each element should be a string of the form ENVVARNAME=VALUE. |
5990851d | 1599 | |
a13f8f50 KL |
1600 | Entries in this list take precedence to those in the frame-local |
1601 | environments. Therefore, let-binding `process-environment' is an easy | |
1602 | way to temporarily change the value of an environment variable, | |
1603 | irrespective of where it comes from. To use `process-environment' to | |
1604 | remove an environment variable, include only its name in the list, | |
1605 | without "=VALUE". | |
5990851d KL |
1606 | |
1607 | This variable is set to nil when Emacs starts. | |
1608 | ||
fdb82f93 PJ |
1609 | If multiple entries define the same variable, the first one always |
1610 | takes precedence. | |
5990851d | 1611 | |
776a24a1 | 1612 | Non-ASCII characters are encoded according to the initial value of |
5990851d KL |
1613 | `locale-coding-system', i.e. the elements must normally be decoded for |
1614 | use. | |
1615 | ||
776a24a1 | 1616 | See `setenv' and `getenv'. */); |
86f5ca04 | 1617 | Vprocess_environment = Qnil; |
80856e74 | 1618 | |
80856e74 | 1619 | defsubr (&Scall_process); |
83fa009c | 1620 | defsubr (&Sgetenv_internal); |
e576cab4 | 1621 | defsubr (&Scall_process_region); |
80856e74 | 1622 | } |