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 | ||
cd64ea1d | 99 | static Lisp_Object Fgetenv_internal (Lisp_Object, Lisp_Object); |
d2bb6598 | 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 | ||
a7ca3326 | 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'). | |
1ef14cb4 LMI |
159 | Insert output in BUFFER before point; t means current buffer; nil for BUFFER |
160 | means discard it; 0 means discard and don't wait; and `(:file FILE)', where | |
161 | FILE is a file name string, means that it should be written to that file. | |
fdb82f93 PJ |
162 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
163 | REAL-BUFFER says what to do with standard output, as above, | |
164 | while STDERR-FILE says what to do with standard error in the child. | |
165 | STDERR-FILE may be nil (discard standard error output), | |
166 | t (mix it with ordinary output), or a file name string. | |
167 | ||
168 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
169 | Remaining arguments are strings passed as command arguments to PROGRAM. | |
170 | ||
a4feb144 RS |
171 | If executable PROGRAM can't be found as an executable, `call-process' |
172 | signals a Lisp error. `call-process' reports errors in execution of | |
173 | the program only through its return and output. | |
174 | ||
fdb82f93 PJ |
175 | If BUFFER is 0, `call-process' returns immediately with value nil. |
176 | Otherwise it waits for PROGRAM to terminate | |
177 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
178 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
179 | ||
180 | usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */) | |
c5101a77 | 181 | (size_t nargs, register Lisp_Object *args) |
80856e74 | 182 | { |
0aa2630f | 183 | Lisp_Object infile, buffer, current_dir, path; |
b9c7f648 | 184 | volatile int display_p_volatile; |
80856e74 JB |
185 | int fd[2]; |
186 | int filefd; | |
187 | register int pid; | |
4da256b1 KS |
188 | #define CALLPROC_BUFFER_SIZE_MIN (16 * 1024) |
189 | #define CALLPROC_BUFFER_SIZE_MAX (4 * CALLPROC_BUFFER_SIZE_MIN) | |
190 | char buf[CALLPROC_BUFFER_SIZE_MAX]; | |
191 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; | |
aed13378 | 192 | int count = SPECPDL_INDEX (); |
3c59b4c9 | 193 | volatile USE_SAFE_ALLOCA; |
2d607244 | 194 | |
b9c7f648 | 195 | const unsigned char **volatile new_argv_volatile; |
1aa83b22 | 196 | register const unsigned char **new_argv; |
39eaa782 RS |
197 | /* File to use for stderr in the child. |
198 | t means use same as standard output. */ | |
199 | Lisp_Object error_file; | |
1ef14cb4 | 200 | Lisp_Object output_file = Qnil; |
7e6c2178 RS |
201 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
202 | char *outf, *tempfile; | |
203 | int outfilefd; | |
80856e74 | 204 | #endif |
1ef14cb4 | 205 | int fd_output = -1; |
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; | |
1ef14cb4 | 210 | int output_to_buffer = 1; |
09494912 RS |
211 | |
212 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ | |
213 | coding_systems = Qt; | |
32d08644 | 214 | |
b7826503 | 215 | CHECK_STRING (args[0]); |
80856e74 | 216 | |
39eaa782 RS |
217 | error_file = Qt; |
218 | ||
7e6c2178 RS |
219 | #ifndef subprocesses |
220 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
177c0ea7 | 221 | if (nargs >= 3 |
09ffb8b5 | 222 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
223 | error ("Operating system cannot handle asynchronous subprocesses"); |
224 | #endif /* subprocesses */ | |
225 | ||
09494912 | 226 | /* Decide the coding-system for giving arguments. */ |
32d08644 KH |
227 | { |
228 | Lisp_Object val, *args2; | |
c5101a77 | 229 | size_t i; |
32d08644 KH |
230 | |
231 | /* If arguments are supplied, we may have to encode them. */ | |
232 | if (nargs >= 5) | |
233 | { | |
30d57b8e | 234 | int must_encode = 0; |
6e50da0a | 235 | Lisp_Object coding_attrs; |
30d57b8e | 236 | |
e7c1c20e | 237 | for (i = 4; i < nargs; i++) |
b7826503 | 238 | CHECK_STRING (args[i]); |
e7c1c20e | 239 | |
a2286b5c | 240 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
241 | if (STRING_MULTIBYTE (args[i])) |
242 | must_encode = 1; | |
243 | ||
beacaab3 KH |
244 | if (!NILP (Vcoding_system_for_write)) |
245 | val = Vcoding_system_for_write; | |
30d57b8e | 246 | else if (! must_encode) |
fcaf8878 | 247 | val = Qraw_text; |
beacaab3 | 248 | else |
32d08644 | 249 | { |
3c59b4c9 | 250 | SAFE_ALLOCA (args2, Lisp_Object *, (nargs + 1) * sizeof *args2); |
32d08644 KH |
251 | args2[0] = Qcall_process; |
252 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 253 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 254 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
32d08644 | 255 | } |
fcaf8878 | 256 | val = complement_process_encoding_system (val); |
32d08644 | 257 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); |
6e50da0a KH |
258 | coding_attrs = CODING_ID_ATTRS (argument_coding.id); |
259 | if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs))) | |
260 | { | |
261 | /* We should not use an ASCII incompatible coding system. */ | |
262 | val = raw_text_coding_system (val); | |
263 | setup_coding_system (val, &argument_coding); | |
264 | } | |
32d08644 | 265 | } |
32d08644 KH |
266 | } |
267 | ||
e576cab4 JB |
268 | if (nargs >= 2 && ! NILP (args[1])) |
269 | { | |
4b4deea2 | 270 | infile = Fexpand_file_name (args[1], BVAR (current_buffer, directory)); |
b7826503 | 271 | CHECK_STRING (infile); |
e576cab4 | 272 | } |
80856e74 | 273 | else |
5437e9f9 | 274 | infile = build_string (NULL_DEVICE); |
80856e74 | 275 | |
e576cab4 JB |
276 | if (nargs >= 3) |
277 | { | |
39eaa782 RS |
278 | buffer = args[2]; |
279 | ||
1ef14cb4 LMI |
280 | /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT |
281 | FILE-FOR-STDERR), unless the first element is :file, in which case see | |
282 | the next paragraph. */ | |
283 | if (CONSP (buffer) && | |
284 | (! SYMBOLP (XCAR (buffer)) || | |
285 | strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file"))) | |
39eaa782 | 286 | { |
70949dac | 287 | if (CONSP (XCDR (buffer))) |
45be8a1e | 288 | { |
a9d4f28a | 289 | Lisp_Object stderr_file; |
70949dac | 290 | stderr_file = XCAR (XCDR (buffer)); |
45be8a1e RS |
291 | |
292 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
293 | error_file = stderr_file; | |
294 | else | |
295 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
296 | } | |
297 | ||
70949dac | 298 | buffer = XCAR (buffer); |
39eaa782 | 299 | } |
044512ed | 300 | |
1ef14cb4 LMI |
301 | /* If the buffer is (still) a list, it might be a (:file "file") spec. */ |
302 | if (CONSP (buffer) && | |
303 | SYMBOLP (XCAR (buffer)) && | |
304 | ! strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file")) | |
305 | { | |
306 | output_file = Fexpand_file_name (XCAR (XCDR (buffer)), | |
307 | BVAR (current_buffer, directory)); | |
308 | CHECK_STRING (output_file); | |
309 | buffer = Qnil; | |
310 | } | |
311 | ||
39eaa782 RS |
312 | if (!(EQ (buffer, Qnil) |
313 | || EQ (buffer, Qt) | |
3ffde7d6 | 314 | || INTEGERP (buffer))) |
e576cab4 | 315 | { |
39eaa782 RS |
316 | Lisp_Object spec_buffer; |
317 | spec_buffer = buffer; | |
50fe359b | 318 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
319 | /* Mention the buffer name for a better error message. */ |
320 | if (NILP (buffer)) | |
b7826503 PJ |
321 | CHECK_BUFFER (spec_buffer); |
322 | CHECK_BUFFER (buffer); | |
e576cab4 JB |
323 | } |
324 | } | |
177c0ea7 | 325 | else |
e576cab4 | 326 | buffer = Qnil; |
80856e74 | 327 | |
58616e67 JB |
328 | /* Make sure that the child will be able to chdir to the current |
329 | buffer's current directory, or its unhandled equivalent. We | |
330 | can't just have the child check for an error when it does the | |
331 | chdir, since it's in a vfork. | |
332 | ||
333 | We have to GCPRO around this because Fexpand_file_name, | |
334 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
335 | might call a file name handling function. The argument list is | |
336 | protected by the caller, so all we really have to worry about is | |
337 | buffer. */ | |
338 | { | |
1ef14cb4 | 339 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
58616e67 | 340 | |
4b4deea2 | 341 | current_dir = BVAR (current_buffer, directory); |
58616e67 | 342 | |
1ef14cb4 | 343 | GCPRO5 (infile, buffer, current_dir, error_file, output_file); |
58616e67 | 344 | |
ca319910 SM |
345 | current_dir = Funhandled_file_name_directory (current_dir); |
346 | if (NILP (current_dir)) | |
347 | /* If the file name handler says that current_dir is unreachable, use | |
348 | a sensible default. */ | |
349 | current_dir = build_string ("~/"); | |
350 | current_dir = expand_and_dir_to_file (current_dir, Qnil); | |
db8454b0 CY |
351 | current_dir = Ffile_name_as_directory (current_dir); |
352 | ||
58616e67 JB |
353 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
354 | report_file_error ("Setting current directory", | |
4b4deea2 | 355 | Fcons (BVAR (current_buffer, directory), Qnil)); |
58616e67 | 356 | |
34b87689 KH |
357 | if (STRING_MULTIBYTE (infile)) |
358 | infile = ENCODE_FILE (infile); | |
359 | if (STRING_MULTIBYTE (current_dir)) | |
360 | current_dir = ENCODE_FILE (current_dir); | |
361 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) | |
362 | error_file = ENCODE_FILE (error_file); | |
1ef14cb4 LMI |
363 | if (STRINGP (output_file) && STRING_MULTIBYTE (output_file)) |
364 | output_file = ENCODE_FILE (output_file); | |
58616e67 JB |
365 | UNGCPRO; |
366 | } | |
367 | ||
b9c7f648 | 368 | display_p_volatile = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
80856e74 | 369 | |
42a5b22f | 370 | filefd = emacs_open (SSDATA (infile), O_RDONLY, 0); |
80856e74 JB |
371 | if (filefd < 0) |
372 | { | |
34b87689 | 373 | infile = DECODE_FILE (infile); |
e576cab4 | 374 | report_file_error ("Opening process input file", Fcons (infile, Qnil)); |
80856e74 | 375 | } |
1ef14cb4 LMI |
376 | |
377 | if (STRINGP (output_file)) | |
378 | { | |
379 | #ifdef DOS_NT | |
380 | fd_output = emacs_open (SSDATA (output_file), | |
381 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, | |
382 | S_IREAD | S_IWRITE); | |
383 | #else /* not DOS_NT */ | |
384 | fd_output = creat (SSDATA (output_file), 0666); | |
385 | #endif /* not DOS_NT */ | |
386 | if (fd_output < 0) | |
387 | { | |
388 | output_file = DECODE_FILE (output_file); | |
389 | report_file_error ("Opening process output file", | |
390 | Fcons (output_file, Qnil)); | |
391 | } | |
392 | if (STRINGP (error_file) || NILP (error_file)) | |
393 | output_to_buffer = 0; | |
394 | } | |
395 | ||
80856e74 | 396 | /* Search for program; barf if not found. */ |
c52b0b34 | 397 | { |
ad3aaf33 | 398 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
c52b0b34 | 399 | |
ad3aaf33 | 400 | GCPRO4 (infile, buffer, current_dir, error_file); |
5c150961 | 401 | openp (Vexec_path, args[0], Vexec_suffixes, &path, make_number (X_OK)); |
c52b0b34 KH |
402 | UNGCPRO; |
403 | } | |
012c6fcb | 404 | if (NILP (path)) |
80856e74 | 405 | { |
68c45bf0 | 406 | emacs_close (filefd); |
80856e74 JB |
407 | report_file_error ("Searching for program", Fcons (args[0], Qnil)); |
408 | } | |
8ee8f447 RS |
409 | |
410 | /* If program file name starts with /: for quoting a magic name, | |
411 | discard that. */ | |
412 | if (SBYTES (path) > 2 && SREF (path, 0) == '/' | |
413 | && SREF (path, 1) == ':') | |
414 | path = Fsubstring (path, make_number (2), Qnil); | |
415 | ||
3c59b4c9 PE |
416 | SAFE_ALLOCA (new_argv, const unsigned char **, |
417 | (nargs > 4 ? nargs - 2 : 2) * sizeof *new_argv); | |
418 | new_argv_volatile = new_argv; | |
c364e618 KH |
419 | if (nargs > 4) |
420 | { | |
c5101a77 | 421 | register size_t i; |
ad3aaf33 | 422 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
c364e618 | 423 | |
ad3aaf33 | 424 | GCPRO5 (infile, buffer, current_dir, path, error_file); |
c5bfa12b KH |
425 | argument_coding.dst_multibyte = 0; |
426 | for (i = 4; i < nargs; i++) | |
c364e618 | 427 | { |
c5bfa12b KH |
428 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); |
429 | if (CODING_REQUIRE_ENCODING (&argument_coding)) | |
91183bfd KH |
430 | /* We must encode this argument. */ |
431 | args[i] = encode_coding_string (&argument_coding, args[i], 1); | |
c364e618 | 432 | } |
c5bfa12b | 433 | UNGCPRO; |
1aa83b22 AS |
434 | for (i = 4; i < nargs; i++) |
435 | new_argv[i - 3] = SDATA (args[i]); | |
436 | new_argv[i - 3] = 0; | |
c364e618 | 437 | } |
db54baaa KH |
438 | else |
439 | new_argv[1] = 0; | |
1aa83b22 | 440 | new_argv[0] = SDATA (path); |
80856e74 | 441 | |
7e6c2178 | 442 | #ifdef MSDOS /* MW, July 1993 */ |
8a52365c | 443 | if ((outf = egetenv ("TMPDIR"))) |
7e6c2178 RS |
444 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); |
445 | else | |
446 | { | |
447 | tempfile = alloca (20); | |
448 | *tempfile = '\0'; | |
449 | } | |
450 | dostounix_filename (tempfile); | |
177c0ea7 | 451 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') |
7e6c2178 RS |
452 | strcat (tempfile, "/"); |
453 | strcat (tempfile, "detmp.XXX"); | |
454 | mktemp (tempfile); | |
455 | ||
1ef14cb4 LMI |
456 | /* If we're redirecting STDOUT to a file, this is already opened. */ |
457 | if (fd_output < 0) | |
7e6c2178 | 458 | { |
1ef14cb4 LMI |
459 | outfilefd = creat (tempfile, S_IREAD | S_IWRITE); |
460 | if (outfilefd < 0) { | |
461 | emacs_close (filefd); | |
462 | report_file_error ("Opening process output file", | |
463 | Fcons (build_string (tempfile), Qnil)); | |
464 | } | |
7e6c2178 | 465 | } |
1ef14cb4 LMI |
466 | else |
467 | outfilefd = fd_output; | |
6f89d28a | 468 | fd[0] = filefd; |
2610078a | 469 | fd[1] = outfilefd; |
6f89d28a | 470 | #endif /* MSDOS */ |
7e6c2178 | 471 | |
d50d3dc8 | 472 | if (INTEGERP (buffer)) |
68c45bf0 | 473 | fd[1] = emacs_open (NULL_DEVICE, O_WRONLY, 0), fd[0] = -1; |
80856e74 JB |
474 | else |
475 | { | |
7e6c2178 | 476 | #ifndef MSDOS |
db92b288 GM |
477 | errno = 0; |
478 | if (pipe (fd) == -1) | |
479 | { | |
480 | emacs_close (filefd); | |
481 | report_file_error ("Creating process pipe", Qnil); | |
482 | } | |
80856e74 JB |
483 | #endif |
484 | } | |
485 | ||
486 | { | |
487 | /* child_setup must clobber environ in systems with true vfork. | |
488 | Protect it from permanent change. */ | |
489 | register char **save_environ = environ; | |
490 | register int fd1 = fd[1]; | |
39eaa782 | 491 | int fd_error = fd1; |
c0ad4ea5 AS |
492 | #ifdef HAVE_WORKING_VFORK |
493 | sigset_t procmask; | |
494 | sigset_t blocked; | |
495 | struct sigaction sigpipe_action; | |
496 | #endif | |
80856e74 | 497 | |
1ef14cb4 LMI |
498 | if (fd_output >= 0) |
499 | fd1 = fd_output; | |
80856e74 | 500 | #if 0 /* Some systems don't have sigblock. */ |
e065a56e | 501 | mask = sigblock (sigmask (SIGCHLD)); |
80856e74 JB |
502 | #endif |
503 | ||
504 | /* Record that we're about to create a synchronous process. */ | |
505 | synch_process_alive = 1; | |
506 | ||
5c03767e RS |
507 | /* These vars record information from process termination. |
508 | Clear them now before process can possibly terminate, | |
509 | to avoid timing error if process terminates soon. */ | |
510 | synch_process_death = 0; | |
511 | synch_process_retcode = 0; | |
6b61353c | 512 | synch_process_termsig = 0; |
5c03767e | 513 | |
39eaa782 | 514 | if (NILP (error_file)) |
68c45bf0 | 515 | fd_error = emacs_open (NULL_DEVICE, O_WRONLY, 0); |
39eaa782 RS |
516 | else if (STRINGP (error_file)) |
517 | { | |
518 | #ifdef DOS_NT | |
42a5b22f | 519 | fd_error = emacs_open (SSDATA (error_file), |
68c45bf0 PE |
520 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, |
521 | S_IREAD | S_IWRITE); | |
39eaa782 | 522 | #else /* not DOS_NT */ |
42a5b22f | 523 | fd_error = creat (SSDATA (error_file), 0666); |
39eaa782 RS |
524 | #endif /* not DOS_NT */ |
525 | } | |
526 | ||
527 | if (fd_error < 0) | |
528 | { | |
68c45bf0 | 529 | emacs_close (filefd); |
6f89d28a | 530 | if (fd[0] != filefd) |
68c45bf0 | 531 | emacs_close (fd[0]); |
39eaa782 | 532 | if (fd1 >= 0) |
68c45bf0 | 533 | emacs_close (fd1); |
6f89d28a MB |
534 | #ifdef MSDOS |
535 | unlink (tempfile); | |
536 | #endif | |
34b87689 KH |
537 | if (NILP (error_file)) |
538 | error_file = build_string (NULL_DEVICE); | |
539 | else if (STRINGP (error_file)) | |
540 | error_file = DECODE_FILE (error_file); | |
541 | report_file_error ("Cannot redirect stderr", Fcons (error_file, Qnil)); | |
39eaa782 | 542 | } |
89e1ec1d | 543 | |
2610078a | 544 | #ifdef MSDOS /* MW, July 1993 */ |
c17c4250 | 545 | /* Note that on MSDOS `child_setup' actually returns the child process |
2610078a KH |
546 | exit status, not its PID, so we assign it to `synch_process_retcode' |
547 | below. */ | |
c17c4250 EZ |
548 | pid = child_setup (filefd, outfilefd, fd_error, (char **) new_argv, |
549 | 0, current_dir); | |
39eaa782 | 550 | |
2610078a KH |
551 | /* Record that the synchronous process exited and note its |
552 | termination status. */ | |
553 | synch_process_alive = 0; | |
554 | synch_process_retcode = pid; | |
555 | if (synch_process_retcode < 0) /* means it couldn't be exec'ed */ | |
68c45bf0 | 556 | { |
ca9c0567 | 557 | synchronize_system_messages_locale (); |
68c45bf0 PE |
558 | synch_process_death = strerror (errno); |
559 | } | |
2610078a | 560 | |
68c45bf0 | 561 | emacs_close (outfilefd); |
2610078a | 562 | if (fd_error != outfilefd) |
68c45bf0 | 563 | emacs_close (fd_error); |
2610078a | 564 | fd1 = -1; /* No harm in closing that one! */ |
32d08644 KH |
565 | /* Since CRLF is converted to LF within `decode_coding', we can |
566 | always open a file with binary mode. */ | |
68c45bf0 | 567 | fd[0] = emacs_open (tempfile, O_RDONLY | O_BINARY, 0); |
2610078a KH |
568 | if (fd[0] < 0) |
569 | { | |
570 | unlink (tempfile); | |
68c45bf0 | 571 | emacs_close (filefd); |
2610078a KH |
572 | report_file_error ("Cannot re-open temporary file", Qnil); |
573 | } | |
574 | #else /* not MSDOS */ | |
bad95d8f | 575 | #ifdef WINDOWSNT |
2d607244 RS |
576 | pid = child_setup (filefd, fd1, fd_error, (char **) new_argv, |
577 | 0, current_dir); | |
bad95d8f | 578 | #else /* not WINDOWSNT */ |
c0ad4ea5 AS |
579 | |
580 | #ifdef HAVE_WORKING_VFORK | |
581 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', | |
582 | this sets the parent's signal handlers as well as the child's. | |
583 | So delay all interrupts whose handlers the child might munge, | |
584 | and record the current handlers so they can be restored later. */ | |
585 | sigemptyset (&blocked); | |
586 | sigaddset (&blocked, SIGPIPE); | |
587 | sigaction (SIGPIPE, 0, &sigpipe_action); | |
588 | sigprocmask (SIG_BLOCK, &blocked, &procmask); | |
589 | #endif | |
590 | ||
aba637ec KS |
591 | BLOCK_INPUT; |
592 | ||
80856e74 JB |
593 | pid = vfork (); |
594 | ||
b9c7f648 PE |
595 | new_argv = new_argv_volatile; |
596 | ||
80856e74 JB |
597 | if (pid == 0) |
598 | { | |
599 | if (fd[0] >= 0) | |
68c45bf0 | 600 | emacs_close (fd[0]); |
1e7963c7 RS |
601 | #ifdef HAVE_SETSID |
602 | setsid (); | |
603 | #endif | |
58eb6cf0 | 604 | #if defined (USG) |
80856e74 JB |
605 | setpgrp (); |
606 | #else | |
607 | setpgrp (pid, pid); | |
608 | #endif /* USG */ | |
c0ad4ea5 | 609 | |
2f9a22e2 | 610 | /* GConf causes us to ignore SIGPIPE, make sure it is restored |
c0ad4ea5 | 611 | in the child. */ |
2f9a22e2 | 612 | //signal (SIGPIPE, SIG_DFL); |
c0ad4ea5 AS |
613 | #ifdef HAVE_WORKING_VFORK |
614 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
615 | #endif | |
616 | ||
2d607244 RS |
617 | child_setup (filefd, fd1, fd_error, (char **) new_argv, |
618 | 0, current_dir); | |
80856e74 | 619 | } |
aba637ec KS |
620 | |
621 | UNBLOCK_INPUT; | |
c0ad4ea5 AS |
622 | |
623 | #ifdef HAVE_WORKING_VFORK | |
624 | /* Restore the signal state. */ | |
625 | sigaction (SIGPIPE, &sigpipe_action, 0); | |
626 | sigprocmask (SIG_SETMASK, &procmask, 0); | |
627 | #endif | |
628 | ||
bad95d8f | 629 | #endif /* not WINDOWSNT */ |
cd5f8f60 RS |
630 | |
631 | /* The MSDOS case did this already. */ | |
632 | if (fd_error >= 0) | |
68c45bf0 | 633 | emacs_close (fd_error); |
2610078a | 634 | #endif /* not MSDOS */ |
80856e74 | 635 | |
80856e74 JB |
636 | environ = save_environ; |
637 | ||
6b6e798b RS |
638 | /* Close most of our fd's, but not fd[0] |
639 | since we will use that to read input from. */ | |
68c45bf0 | 640 | emacs_close (filefd); |
1ef14cb4 LMI |
641 | if (fd_output >= 0) |
642 | emacs_close (fd_output); | |
799abb26 | 643 | if (fd1 >= 0 && fd1 != fd_error) |
68c45bf0 | 644 | emacs_close (fd1); |
80856e74 JB |
645 | } |
646 | ||
647 | if (pid < 0) | |
648 | { | |
6b6e798b | 649 | if (fd[0] >= 0) |
68c45bf0 | 650 | emacs_close (fd[0]); |
80856e74 JB |
651 | report_file_error ("Doing vfork", Qnil); |
652 | } | |
653 | ||
d50d3dc8 | 654 | if (INTEGERP (buffer)) |
80856e74 | 655 | { |
6b6e798b | 656 | if (fd[0] >= 0) |
68c45bf0 | 657 | emacs_close (fd[0]); |
80856e74 JB |
658 | return Qnil; |
659 | } | |
660 | ||
6b6e798b | 661 | /* Enable sending signal if user quits below. */ |
37d54121 RS |
662 | call_process_exited = 0; |
663 | ||
e39a993c | 664 | #if defined(MSDOS) |
7e6c2178 RS |
665 | /* MSDOS needs different cleanup information. */ |
666 | record_unwind_protect (call_process_cleanup, | |
ad3aaf33 AS |
667 | Fcons (Fcurrent_buffer (), |
668 | Fcons (make_number (fd[0]), | |
669 | build_string (tempfile)))); | |
7e6c2178 | 670 | #else |
80856e74 | 671 | record_unwind_protect (call_process_cleanup, |
ad3aaf33 AS |
672 | Fcons (Fcurrent_buffer (), |
673 | Fcons (make_number (fd[0]), make_number (pid)))); | |
e39a993c | 674 | #endif /* not MSDOS */ |
80856e74 JB |
675 | |
676 | ||
d50d3dc8 | 677 | if (BUFFERP (buffer)) |
80856e74 JB |
678 | Fset_buffer (buffer); |
679 | ||
09494912 RS |
680 | if (NILP (buffer)) |
681 | { | |
682 | /* If BUFFER is nil, we must read process output once and then | |
683 | discard it, so setup coding system but with nil. */ | |
684 | setup_coding_system (Qnil, &process_coding); | |
685 | } | |
686 | else | |
687 | { | |
688 | Lisp_Object val, *args2; | |
689 | ||
690 | val = Qnil; | |
691 | if (!NILP (Vcoding_system_for_read)) | |
692 | val = Vcoding_system_for_read; | |
693 | else | |
694 | { | |
695 | if (EQ (coding_systems, Qt)) | |
696 | { | |
c5101a77 | 697 | size_t i; |
09494912 | 698 | |
3c59b4c9 | 699 | SAFE_ALLOCA (args2, Lisp_Object *, (nargs + 1) * sizeof *args2); |
09494912 RS |
700 | args2[0] = Qcall_process; |
701 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
702 | coding_systems | |
703 | = Ffind_operation_coding_system (nargs + 1, args2); | |
704 | } | |
705 | if (CONSP (coding_systems)) | |
70949dac | 706 | val = XCAR (coding_systems); |
09494912 | 707 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 708 | val = XCAR (Vdefault_process_coding_system); |
09494912 RS |
709 | else |
710 | val = Qnil; | |
711 | } | |
91183bfd | 712 | Fcheck_coding_system (val); |
09494912 RS |
713 | /* In unibyte mode, character code conversion should not take |
714 | place but EOL conversion should. So, setup raw-text or one | |
715 | of the subsidiary according to the information just setup. */ | |
4b4deea2 | 716 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
09494912 | 717 | && !NILP (val)) |
91183bfd KH |
718 | val = raw_text_coding_system (val); |
719 | setup_coding_system (val, &process_coding); | |
09494912 RS |
720 | } |
721 | ||
80856e74 JB |
722 | immediate_quit = 1; |
723 | QUIT; | |
724 | ||
1ef14cb4 | 725 | if (output_to_buffer) |
80856e74 | 726 | { |
69481da7 | 727 | register EMACS_INT nread; |
0ad477db | 728 | int first = 1; |
69481da7 | 729 | EMACS_INT total_read = 0; |
321fecde | 730 | int carryover = 0; |
b9c7f648 | 731 | int display_p = display_p_volatile; |
0aa2630f | 732 | int display_on_the_fly = display_p; |
05b44e90 KH |
733 | struct coding_system saved_coding; |
734 | ||
735 | saved_coding = process_coding; | |
60558b19 | 736 | while (1) |
80856e74 | 737 | { |
60558b19 RS |
738 | /* Repeatedly read until we've filled as much as possible |
739 | of the buffer size we have. But don't read | |
8e6208c5 | 740 | less than 1024--save that for the next bufferful. */ |
321fecde | 741 | nread = carryover; |
60558b19 | 742 | while (nread < bufsize - 1024) |
00fb3e95 | 743 | { |
4da256b1 | 744 | int this_read = emacs_read (fd[0], buf + nread, |
68c45bf0 | 745 | bufsize - nread); |
60558b19 RS |
746 | |
747 | if (this_read < 0) | |
748 | goto give_up; | |
749 | ||
750 | if (this_read == 0) | |
7a7ab107 KH |
751 | { |
752 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
753 | break; | |
754 | } | |
60558b19 RS |
755 | |
756 | nread += this_read; | |
7a7ab107 | 757 | total_read += this_read; |
60558b19 | 758 | |
7a7ab107 KH |
759 | if (display_on_the_fly) |
760 | break; | |
761 | } | |
60558b19 RS |
762 | |
763 | /* Now NREAD is the total amount of data in the buffer. */ | |
80856e74 | 764 | immediate_quit = 0; |
177c0ea7 | 765 | |
012c6fcb | 766 | if (!NILP (buffer)) |
32d08644 | 767 | { |
4b4deea2 | 768 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
bb4a3884 | 769 | && ! CODING_MAY_REQUIRE_DECODING (&process_coding)) |
4da256b1 | 770 | insert_1_both (buf, nread, nread, 0, 1, 0); |
32d08644 KH |
771 | else |
772 | { /* We have to decode the input. */ | |
45d60801 | 773 | Lisp_Object curbuf; |
71a0c011 | 774 | int count1 = SPECPDL_INDEX (); |
177c0ea7 | 775 | |
45d60801 | 776 | XSETBUFFER (curbuf, current_buffer); |
71a0c011 EZ |
777 | /* We cannot allow after-change-functions be run |
778 | during decoding, because that might modify the | |
779 | buffer, while we rely on process_coding.produced to | |
780 | faithfully reflect inserted text until we | |
781 | TEMP_SET_PT_BOTH below. */ | |
782 | specbind (Qinhibit_modification_hooks, Qt); | |
0ca76b1e PE |
783 | decode_coding_c_string (&process_coding, (unsigned char *) buf, |
784 | nread, curbuf); | |
71a0c011 | 785 | unbind_to (count1, Qnil); |
7a7ab107 | 786 | if (display_on_the_fly |
91183bfd KH |
787 | && CODING_REQUIRE_DETECTION (&saved_coding) |
788 | && ! CODING_REQUIRE_DETECTION (&process_coding)) | |
7a7ab107 KH |
789 | { |
790 | /* We have detected some coding system. But, | |
791 | there's a possibility that the detection was | |
792 | done by insufficient data. So, we give up | |
793 | displaying on the fly. */ | |
91183bfd KH |
794 | if (process_coding.produced > 0) |
795 | del_range_2 (process_coding.dst_pos, | |
796 | process_coding.dst_pos_byte, | |
797 | process_coding.dst_pos | |
798 | + process_coding.produced_char, | |
799 | process_coding.dst_pos_byte | |
800 | + process_coding.produced, 0); | |
7a7ab107 KH |
801 | display_on_the_fly = 0; |
802 | process_coding = saved_coding; | |
803 | carryover = nread; | |
0aa2630f KS |
804 | /* This is to make the above condition always |
805 | fails in the future. */ | |
21d0467f KH |
806 | saved_coding.common_flags |
807 | &= ~CODING_REQUIRE_DETECTION_MASK; | |
7a7ab107 KH |
808 | continue; |
809 | } | |
177c0ea7 | 810 | |
ea99bcc1 KH |
811 | TEMP_SET_PT_BOTH (PT + process_coding.produced_char, |
812 | PT_BYTE + process_coding.produced); | |
54ab3d3b | 813 | carryover = process_coding.carryover_bytes; |
321fecde | 814 | if (carryover > 0) |
72af86bd AS |
815 | memcpy (buf, process_coding.carryover, |
816 | process_coding.carryover_bytes); | |
32d08644 KH |
817 | } |
818 | } | |
c5bfa12b | 819 | |
321fecde | 820 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
c5bfa12b | 821 | break; |
6e3bfbb2 RS |
822 | |
823 | /* Make the buffer bigger as we continue to read more data, | |
4da256b1 KS |
824 | but not past CALLPROC_BUFFER_SIZE_MAX. */ |
825 | if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) | |
826 | if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) | |
827 | bufsize = CALLPROC_BUFFER_SIZE_MAX; | |
6e3bfbb2 | 828 | |
0aa2630f | 829 | if (display_p) |
0ad477db RS |
830 | { |
831 | if (first) | |
832 | prepare_menu_bars (); | |
833 | first = 0; | |
3007ebfb | 834 | redisplay_preserve_echo_area (1); |
0aa2630f KS |
835 | /* This variable might have been set to 0 for code |
836 | detection. In that case, we set it back to 1 because | |
837 | we should have already detected a coding system. */ | |
838 | display_on_the_fly = 1; | |
0ad477db | 839 | } |
80856e74 JB |
840 | immediate_quit = 1; |
841 | QUIT; | |
842 | } | |
60558b19 | 843 | give_up: ; |
80856e74 | 844 | |
91183bfd KH |
845 | Vlast_coding_system_used = CODING_ID_NAME (process_coding.id); |
846 | /* If the caller required, let the buffer inherit the | |
847 | coding-system used to decode the process output. */ | |
848 | if (inherit_process_coding_system) | |
849 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
ad3aaf33 | 850 | make_number (total_read)); |
3b440bb5 EZ |
851 | } |
852 | ||
77defa9a | 853 | #ifndef MSDOS |
80856e74 | 854 | /* Wait for it to terminate, unless it already has. */ |
1ef14cb4 LMI |
855 | if (output_to_buffer) |
856 | wait_for_termination (pid); | |
857 | else | |
858 | interruptible_wait_for_termination (pid); | |
77defa9a | 859 | #endif |
80856e74 JB |
860 | |
861 | immediate_quit = 0; | |
862 | ||
37d54121 RS |
863 | /* Don't kill any children that the subprocess may have left behind |
864 | when exiting. */ | |
865 | call_process_exited = 1; | |
866 | ||
3c59b4c9 | 867 | SAFE_FREE (); |
80856e74 JB |
868 | unbind_to (count, Qnil); |
869 | ||
6b61353c KH |
870 | if (synch_process_termsig) |
871 | { | |
42ca4633 | 872 | const char *signame; |
6b61353c KH |
873 | |
874 | synchronize_system_messages_locale (); | |
875 | signame = strsignal (synch_process_termsig); | |
876 | ||
877 | if (signame == 0) | |
878 | signame = "unknown"; | |
879 | ||
880 | synch_process_death = signame; | |
881 | } | |
882 | ||
80856e74 | 883 | if (synch_process_death) |
68c45bf0 PE |
884 | return code_convert_string_norecord (build_string (synch_process_death), |
885 | Vlocale_coding_system, 0); | |
80856e74 JB |
886 | return make_number (synch_process_retcode); |
887 | } | |
80856e74 | 888 | \f |
9fefd2ba | 889 | static Lisp_Object |
971de7fb | 890 | delete_temp_file (Lisp_Object name) |
80856e74 | 891 | { |
1a271e14 KR |
892 | /* Suppress jka-compr handling, etc. */ |
893 | int count = SPECPDL_INDEX (); | |
894 | specbind (intern ("file-name-handler-alist"), Qnil); | |
f1a5d776 | 895 | internal_delete_file (name); |
1a271e14 | 896 | unbind_to (count, Qnil); |
320695d8 | 897 | return Qnil; |
80856e74 JB |
898 | } |
899 | ||
900 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
fdb82f93 PJ |
901 | 3, MANY, 0, |
902 | doc: /* Send text from START to END to a synchronous process running PROGRAM. | |
903 | The remaining arguments are optional. | |
904 | Delete the text if fourth arg DELETE is non-nil. | |
905 | ||
1ef14cb4 LMI |
906 | Insert output in BUFFER before point; t means current buffer; nil for |
907 | BUFFER means discard it; 0 means discard and don't wait; and `(:file | |
908 | FILE)', where FILE is a file name string, means that it should be | |
909 | written to that file. | |
fdb82f93 PJ |
910 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
911 | REAL-BUFFER says what to do with standard output, as above, | |
912 | while STDERR-FILE says what to do with standard error in the child. | |
913 | STDERR-FILE may be nil (discard standard error output), | |
914 | t (mix it with ordinary output), or a file name string. | |
915 | ||
916 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
917 | Remaining args are passed to PROGRAM at startup as command args. | |
918 | ||
ba9a5174 | 919 | If BUFFER is 0, `call-process-region' returns immediately with value nil. |
fdb82f93 PJ |
920 | Otherwise it waits for PROGRAM to terminate |
921 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
922 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
923 | ||
924 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) | |
c5101a77 | 925 | (size_t nargs, register Lisp_Object *args) |
80856e74 | 926 | { |
39323a7e KH |
927 | struct gcpro gcpro1; |
928 | Lisp_Object filename_string; | |
929 | register Lisp_Object start, end; | |
aed13378 | 930 | int count = SPECPDL_INDEX (); |
08ee4e87 | 931 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
09494912 | 932 | Lisp_Object coding_systems; |
32d08644 | 933 | Lisp_Object val, *args2; |
c5101a77 | 934 | size_t i; |
7e6c2178 | 935 | char *tempfile; |
f92d51d8 | 936 | Lisp_Object tmpdir, pattern; |
7e6c2178 | 937 | |
f92d51d8 CY |
938 | if (STRINGP (Vtemporary_file_directory)) |
939 | tmpdir = Vtemporary_file_directory; | |
7e6c2178 RS |
940 | else |
941 | { | |
f92d51d8 CY |
942 | #ifndef DOS_NT |
943 | if (getenv ("TMPDIR")) | |
944 | tmpdir = build_string (getenv ("TMPDIR")); | |
945 | else | |
946 | tmpdir = build_string ("/tmp/"); | |
947 | #else /* DOS_NT */ | |
948 | char *outf; | |
949 | if ((outf = egetenv ("TMPDIR")) | |
950 | || (outf = egetenv ("TMP")) | |
951 | || (outf = egetenv ("TEMP"))) | |
952 | tmpdir = build_string (outf); | |
953 | else | |
954 | tmpdir = Ffile_name_as_directory (build_string ("c:/temp")); | |
0774fcf8 | 955 | #endif |
f92d51d8 | 956 | } |
7e6c2178 | 957 | |
3c59b4c9 PE |
958 | { |
959 | USE_SAFE_ALLOCA; | |
960 | pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir); | |
961 | SAFE_ALLOCA (tempfile, char *, SBYTES (pattern) + 1); | |
962 | memcpy (tempfile, SDATA (pattern), SBYTES (pattern) + 1); | |
963 | coding_systems = Qt; | |
09494912 | 964 | |
1ddc85a4 | 965 | #ifdef HAVE_MKSTEMP |
3c59b4c9 PE |
966 | { |
967 | int fd; | |
968 | ||
969 | BLOCK_INPUT; | |
970 | fd = mkstemp (tempfile); | |
971 | UNBLOCK_INPUT; | |
972 | if (fd == -1) | |
973 | report_file_error ("Failed to open temporary file", | |
974 | Fcons (Vtemp_file_name_pattern, Qnil)); | |
975 | else | |
976 | close (fd); | |
977 | } | |
1ddc85a4 | 978 | #else |
3c59b4c9 | 979 | mktemp (tempfile); |
1ddc85a4 | 980 | #endif |
80856e74 | 981 | |
3c59b4c9 PE |
982 | filename_string = build_string (tempfile); |
983 | GCPRO1 (filename_string); | |
984 | SAFE_FREE (); | |
985 | } | |
986 | ||
80856e74 JB |
987 | start = args[0]; |
988 | end = args[1]; | |
32d08644 | 989 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
990 | if (!NILP (Vcoding_system_for_write)) |
991 | val = Vcoding_system_for_write; | |
4b4deea2 | 992 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
fcaf8878 | 993 | val = Qraw_text; |
32d08644 | 994 | else |
beacaab3 | 995 | { |
3c59b4c9 PE |
996 | USE_SAFE_ALLOCA; |
997 | SAFE_ALLOCA (args2, Lisp_Object *, (nargs + 1) * sizeof *args2); | |
91489411 RS |
998 | args2[0] = Qcall_process_region; |
999 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1000 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); | |
fcaf8878 | 1001 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
3c59b4c9 | 1002 | SAFE_FREE (); |
beacaab3 | 1003 | } |
fcaf8878 | 1004 | val = complement_process_encoding_system (val); |
32d08644 | 1005 | |
168afdaa | 1006 | { |
aed13378 | 1007 | int count1 = SPECPDL_INDEX (); |
168afdaa RS |
1008 | |
1009 | specbind (intern ("coding-system-for-write"), val); | |
bb951f0e KR |
1010 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
1011 | happen to get a ".Z" suffix. */ | |
1012 | specbind (intern ("file-name-handler-alist"), Qnil); | |
168afdaa RS |
1013 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil); |
1014 | ||
1015 | unbind_to (count1, Qnil); | |
1016 | } | |
91489411 | 1017 | |
177c0ea7 | 1018 | /* Note that Fcall_process takes care of binding |
91489411 | 1019 | coding-system-for-read. */ |
093650fe | 1020 | |
80856e74 JB |
1021 | record_unwind_protect (delete_temp_file, filename_string); |
1022 | ||
edf496dd | 1023 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
1024 | Fdelete_region (start, end); |
1025 | ||
edf496dd KH |
1026 | if (nargs > 3) |
1027 | { | |
1028 | args += 2; | |
1029 | nargs -= 2; | |
1030 | } | |
1031 | else | |
1032 | { | |
1033 | args[0] = args[2]; | |
1034 | nargs = 2; | |
1035 | } | |
1036 | args[1] = filename_string; | |
80856e74 | 1037 | |
edf496dd | 1038 | RETURN_UNGCPRO (unbind_to (count, Fcall_process (nargs, args))); |
80856e74 JB |
1039 | } |
1040 | \f | |
361358ea | 1041 | #ifndef WINDOWSNT |
971de7fb | 1042 | static int relocate_fd (int fd, int minfd); |
361358ea | 1043 | #endif |
dfcf069d | 1044 | |
5990851d KL |
1045 | static char ** |
1046 | add_env (char **env, char **new_env, char *string) | |
1047 | { | |
1048 | char **ep; | |
1049 | int ok = 1; | |
1050 | if (string == NULL) | |
1051 | return new_env; | |
1052 | ||
1053 | /* See if this string duplicates any string already in the env. | |
1054 | If so, don't put it in. | |
1055 | When an env var has multiple definitions, | |
1056 | we keep the definition that comes first in process-environment. */ | |
1057 | for (ep = env; ok && ep != new_env; ep++) | |
1058 | { | |
1059 | char *p = *ep, *q = string; | |
1060 | while (ok) | |
1061 | { | |
1062 | if (*q != *p) | |
1063 | break; | |
1064 | if (*q == 0) | |
1065 | /* The string is a lone variable name; keep it for now, we | |
1066 | will remove it later. It is a placeholder for a | |
1067 | variable that is not to be included in the environment. */ | |
1068 | break; | |
1069 | if (*q == '=') | |
1070 | ok = 0; | |
1071 | p++, q++; | |
1072 | } | |
1073 | } | |
1074 | if (ok) | |
1075 | *new_env++ = string; | |
1076 | return new_env; | |
1077 | } | |
1078 | ||
80856e74 JB |
1079 | /* This is the last thing run in a newly forked inferior |
1080 | either synchronous or asynchronous. | |
1081 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
1082 | Initialize inferior's priority, pgrp, connected dir and environment. | |
1083 | then exec another program based on new_argv. | |
1084 | ||
1085 | This function may change environ for the superior process. | |
1086 | Therefore, the superior process must save and restore the value | |
1087 | of environ around the vfork and the call to this function. | |
1088 | ||
80856e74 | 1089 | SET_PGRP is nonzero if we should put the subprocess into a separate |
177c0ea7 | 1090 | process group. |
e576cab4 JB |
1091 | |
1092 | CURRENT_DIR is an elisp string giving the path of the current | |
1093 | directory the subprocess should have. Since we can't really signal | |
1094 | a decent error from within the child, this should be verified as an | |
1095 | executable directory by the parent. */ | |
80856e74 | 1096 | |
dfcf069d | 1097 | int |
971de7fb | 1098 | child_setup (int in, int out, int err, register char **new_argv, int set_pgrp, Lisp_Object current_dir) |
80856e74 | 1099 | { |
e576cab4 | 1100 | char **env; |
7fcf7f05 | 1101 | char *pwd_var; |
bad95d8f RS |
1102 | #ifdef WINDOWSNT |
1103 | int cpid; | |
4252a4bd | 1104 | HANDLE handles[3]; |
bad95d8f | 1105 | #endif /* WINDOWSNT */ |
e576cab4 | 1106 | |
33abe2d9 | 1107 | int pid = getpid (); |
80856e74 | 1108 | |
80856e74 JB |
1109 | /* Close Emacs's descriptors that this process should not have. */ |
1110 | close_process_descs (); | |
ded80a25 | 1111 | |
c17c4250 EZ |
1112 | /* DOS_NT isn't in a vfork, so if we are in the middle of load-file, |
1113 | we will lose if we call close_load_descs here. */ | |
1114 | #ifndef DOS_NT | |
4458cebe | 1115 | close_load_descs (); |
c17c4250 | 1116 | #endif |
80856e74 JB |
1117 | |
1118 | /* Note that use of alloca is always safe here. It's obvious for systems | |
1119 | that do not have true vfork or that have true (stack) alloca. | |
caa01fe0 GM |
1120 | If using vfork and C_ALLOCA (when Emacs used to include |
1121 | src/alloca.c) it is safe because that changes the superior's | |
1122 | static variables as if the superior had done alloca and will be | |
1123 | cleaned up in the usual way. */ | |
e576cab4 | 1124 | { |
7fcf7f05 | 1125 | register char *temp; |
e576cab4 | 1126 | register int i; |
77d78be1 | 1127 | |
d5db4077 | 1128 | i = SBYTES (current_dir); |
16425c4a EZ |
1129 | #ifdef MSDOS |
1130 | /* MSDOS must have all environment variables malloc'ed, because | |
1131 | low-level libc functions that launch subsidiary processes rely | |
1132 | on that. */ | |
1133 | pwd_var = (char *) xmalloc (i + 6); | |
1134 | #else | |
7fcf7f05 | 1135 | pwd_var = (char *) alloca (i + 6); |
16425c4a | 1136 | #endif |
7fcf7f05 | 1137 | temp = pwd_var + 4; |
72af86bd AS |
1138 | memcpy (pwd_var, "PWD=", 4); |
1139 | memcpy (temp, SDATA (current_dir), i); | |
bad95d8f | 1140 | if (!IS_DIRECTORY_SEP (temp[i - 1])) temp[i++] = DIRECTORY_SEP; |
e576cab4 JB |
1141 | temp[i] = 0; |
1142 | ||
c17c4250 | 1143 | #ifndef DOS_NT |
e576cab4 JB |
1144 | /* We can't signal an Elisp error here; we're in a vfork. Since |
1145 | the callers check the current directory before forking, this | |
1146 | should only return an error if the directory's permissions | |
1147 | are changed between the check and this chdir, but we should | |
1148 | at least check. */ | |
1149 | if (chdir (temp) < 0) | |
20b25e46 | 1150 | _exit (errno); |
f8d23104 | 1151 | #else /* DOS_NT */ |
c17c4250 EZ |
1152 | /* Get past the drive letter, so that d:/ is left alone. */ |
1153 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
1154 | { | |
1155 | temp += 2; | |
1156 | i -= 2; | |
1157 | } | |
f8d23104 | 1158 | #endif /* DOS_NT */ |
c17c4250 | 1159 | |
7fcf7f05 | 1160 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 1161 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 1162 | temp[--i] = 0; |
e576cab4 | 1163 | } |
80856e74 | 1164 | |
5990851d | 1165 | /* Set `env' to a vector of the strings in the environment. */ |
80856e74 JB |
1166 | { |
1167 | register Lisp_Object tem; | |
1168 | register char **new_env; | |
5990851d | 1169 | char **p, **q; |
80856e74 | 1170 | register int new_length; |
d2bb6598 | 1171 | Lisp_Object display = Qnil; |
361358ea | 1172 | |
80856e74 | 1173 | new_length = 0; |
f105f403 | 1174 | |
80856e74 | 1175 | for (tem = Vprocess_environment; |
5990851d KL |
1176 | CONSP (tem) && STRINGP (XCAR (tem)); |
1177 | tem = XCDR (tem)) | |
d2bb6598 | 1178 | { |
42a5b22f | 1179 | if (strncmp (SSDATA (XCAR (tem)), "DISPLAY", 7) == 0 |
d2bb6598 SM |
1180 | && (SDATA (XCAR (tem)) [7] == '\0' |
1181 | || SDATA (XCAR (tem)) [7] == '=')) | |
1182 | /* DISPLAY is specified in process-environment. */ | |
1183 | display = Qt; | |
1184 | new_length++; | |
1185 | } | |
de87fb59 | 1186 | |
d2bb6598 SM |
1187 | /* If not provided yet, use the frame's DISPLAY. */ |
1188 | if (NILP (display)) | |
1189 | { | |
1190 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); | |
1191 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) | |
1192 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1193 | tmp = Fgetenv_internal (build_string ("DISPLAY"), | |
1194 | Vinitial_environment); | |
1195 | if (STRINGP (tmp)) | |
1196 | { | |
1197 | display = tmp; | |
1198 | new_length++; | |
1199 | } | |
1200 | } | |
80856e74 | 1201 | |
7fcf7f05 RS |
1202 | /* new_length + 2 to include PWD and terminating 0. */ |
1203 | env = new_env = (char **) alloca ((new_length + 2) * sizeof (char *)); | |
7fcf7f05 RS |
1204 | /* If we have a PWD envvar, pass one down, |
1205 | but with corrected value. */ | |
a13f8f50 | 1206 | if (egetenv ("PWD")) |
7fcf7f05 | 1207 | *new_env++ = pwd_var; |
361358ea | 1208 | |
6b8e474c | 1209 | if (STRINGP (display)) |
de87fb59 | 1210 | { |
42a5b22f | 1211 | int vlen = strlen ("DISPLAY=") + strlen (SSDATA (display)) + 1; |
de87fb59 DN |
1212 | char *vdata = (char *) alloca (vlen); |
1213 | strcpy (vdata, "DISPLAY="); | |
42a5b22f | 1214 | strcat (vdata, SSDATA (display)); |
de87fb59 DN |
1215 | new_env = add_env (env, new_env, vdata); |
1216 | } | |
80856e74 | 1217 | |
5990851d | 1218 | /* Overrides. */ |
80856e74 | 1219 | for (tem = Vprocess_environment; |
70949dac KR |
1220 | CONSP (tem) && STRINGP (XCAR (tem)); |
1221 | tem = XCDR (tem)) | |
42a5b22f | 1222 | new_env = add_env (env, new_env, SSDATA (XCAR (tem))); |
d2bb6598 | 1223 | |
5990851d KL |
1224 | *new_env = 0; |
1225 | ||
1226 | /* Remove variable names without values. */ | |
1227 | p = q = env; | |
1228 | while (*p != 0) | |
cd9565ba | 1229 | { |
5990851d | 1230 | while (*q != 0 && strchr (*q, '=') == NULL) |
1baf6db9 | 1231 | q++; |
5990851d KL |
1232 | *p = *q++; |
1233 | if (*p != 0) | |
1234 | p++; | |
cd9565ba | 1235 | } |
80856e74 | 1236 | } |
de87fb59 | 1237 | |
361358ea | 1238 | |
bad95d8f RS |
1239 | #ifdef WINDOWSNT |
1240 | prepare_standard_handles (in, out, err, handles); | |
d5db4077 | 1241 | set_process_dir (SDATA (current_dir)); |
67802943 DN |
1242 | /* Spawn the child. (See ntproc.c:Spawnve). */ |
1243 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); | |
1244 | reset_standard_handles (in, out, err, handles); | |
1245 | if (cpid == -1) | |
1246 | /* An error occurred while trying to spawn the process. */ | |
1247 | report_file_error ("Spawning child process", Qnil); | |
1248 | return cpid; | |
1249 | ||
bad95d8f | 1250 | #else /* not WINDOWSNT */ |
426b37ae JB |
1251 | /* Make sure that in, out, and err are not actually already in |
1252 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1253 | started with its standard in, out, or error closed, as might |
426b37ae | 1254 | happen under X. */ |
f29f9e4a RS |
1255 | { |
1256 | int oin = in, oout = out; | |
1257 | ||
1258 | /* We have to avoid relocating the same descriptor twice! */ | |
1259 | ||
1260 | in = relocate_fd (in, 3); | |
1261 | ||
1262 | if (out == oin) | |
1263 | out = in; | |
1264 | else | |
3e9367e7 | 1265 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1266 | |
1267 | if (err == oin) | |
1268 | err = in; | |
1269 | else if (err == oout) | |
1270 | err = out; | |
1271 | else | |
3e9367e7 | 1272 | err = relocate_fd (err, 3); |
f29f9e4a | 1273 | } |
426b37ae | 1274 | |
c17c4250 | 1275 | #ifndef MSDOS |
68c45bf0 PE |
1276 | emacs_close (0); |
1277 | emacs_close (1); | |
1278 | emacs_close (2); | |
80856e74 JB |
1279 | |
1280 | dup2 (in, 0); | |
1281 | dup2 (out, 1); | |
1282 | dup2 (err, 2); | |
68c45bf0 | 1283 | emacs_close (in); |
ce8f5a9a AS |
1284 | if (out != in) |
1285 | emacs_close (out); | |
1286 | if (err != in && err != out) | |
1287 | emacs_close (err); | |
80856e74 | 1288 | |
58eb6cf0 | 1289 | #if defined(USG) |
fdba8590 | 1290 | #ifndef SETPGRP_RELEASES_CTTY |
e576cab4 | 1291 | setpgrp (); /* No arguments but equivalent in this case */ |
fdba8590 | 1292 | #endif |
67802943 | 1293 | #else /* not USG */ |
e576cab4 | 1294 | setpgrp (pid, pid); |
67802943 | 1295 | #endif /* not USG */ |
80856e74 | 1296 | |
a7ebc409 | 1297 | /* setpgrp_of_tty is incorrect here; it uses input_fd. */ |
12e610e8 | 1298 | tcsetpgrp (0, pid); |
a7ebc409 | 1299 | |
80856e74 JB |
1300 | /* execvp does not accept an environment arg so the only way |
1301 | to pass this environment is to set environ. Our caller | |
1302 | is responsible for restoring the ambient value of environ. */ | |
1303 | environ = env; | |
1304 | execvp (new_argv[0], new_argv); | |
1305 | ||
68c45bf0 PE |
1306 | emacs_write (1, "Can't exec program: ", 20); |
1307 | emacs_write (1, new_argv[0], strlen (new_argv[0])); | |
1308 | emacs_write (1, "\n", 1); | |
80856e74 | 1309 | _exit (1); |
67802943 DN |
1310 | |
1311 | #else /* MSDOS */ | |
1312 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
1313 | xfree (pwd_var); | |
1314 | if (pid == -1) | |
1315 | /* An error occurred while trying to run the subprocess. */ | |
1316 | report_file_error ("Spawning child process", Qnil); | |
1317 | return pid; | |
1318 | #endif /* MSDOS */ | |
ae76d9e1 | 1319 | #endif /* not WINDOWSNT */ |
80856e74 JB |
1320 | } |
1321 | ||
361358ea | 1322 | #ifndef WINDOWSNT |
a3833dfe | 1323 | /* Move the file descriptor FD so that its number is not less than MINFD. |
426b37ae | 1324 | If the file descriptor is moved at all, the original is freed. */ |
dfcf069d | 1325 | static int |
971de7fb | 1326 | relocate_fd (int fd, int minfd) |
426b37ae | 1327 | { |
a3833dfe | 1328 | if (fd >= minfd) |
426b37ae JB |
1329 | return fd; |
1330 | else | |
1331 | { | |
cf237e27 AS |
1332 | int new; |
1333 | #ifdef F_DUPFD | |
1334 | new = fcntl (fd, F_DUPFD, minfd); | |
1335 | #else | |
1336 | new = dup (fd); | |
1337 | if (new != -1) | |
1338 | /* Note that we hold the original FD open while we recurse, | |
1339 | to guarantee we'll get a new FD if we need it. */ | |
1340 | new = relocate_fd (new, minfd); | |
1341 | #endif | |
426b37ae JB |
1342 | if (new == -1) |
1343 | { | |
cb1d0ef7 | 1344 | const char *message_1 = "Error while setting up child: "; |
a8fe7202 | 1345 | const char *errmessage = strerror (errno); |
cb1d0ef7 PE |
1346 | const char *message_2 = "\n"; |
1347 | emacs_write (2, message_1, strlen (message_1)); | |
68c45bf0 | 1348 | emacs_write (2, errmessage, strlen (errmessage)); |
cb1d0ef7 | 1349 | emacs_write (2, message_2, strlen (message_2)); |
426b37ae JB |
1350 | _exit (1); |
1351 | } | |
68c45bf0 | 1352 | emacs_close (fd); |
426b37ae JB |
1353 | return new; |
1354 | } | |
1355 | } | |
361358ea | 1356 | #endif /* not WINDOWSNT */ |
426b37ae | 1357 | |
012c6fcb | 1358 | static int |
a8fe7202 AS |
1359 | getenv_internal_1 (const char *var, int varlen, char **value, int *valuelen, |
1360 | Lisp_Object env) | |
012c6fcb | 1361 | { |
db699fc6 | 1362 | for (; CONSP (env); env = XCDR (env)) |
012c6fcb | 1363 | { |
db699fc6 | 1364 | Lisp_Object entry = XCAR (env); |
d50d3dc8 | 1365 | if (STRINGP (entry) |
db699fc6 | 1366 | && SBYTES (entry) >= varlen |
bad95d8f RS |
1367 | #ifdef WINDOWSNT |
1368 | /* NT environment variables are case insensitive. */ | |
d5db4077 | 1369 | && ! strnicmp (SDATA (entry), var, varlen) |
bad95d8f | 1370 | #else /* not WINDOWSNT */ |
72af86bd | 1371 | && ! memcmp (SDATA (entry), var, varlen) |
bad95d8f | 1372 | #endif /* not WINDOWSNT */ |
a9971c6d | 1373 | ) |
012c6fcb | 1374 | { |
db699fc6 SM |
1375 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') |
1376 | { | |
51b59d79 | 1377 | *value = SSDATA (entry) + (varlen + 1); |
db699fc6 SM |
1378 | *valuelen = SBYTES (entry) - (varlen + 1); |
1379 | return 1; | |
1380 | } | |
1381 | else if (SBYTES (entry) == varlen) | |
1382 | { | |
1383 | /* Lone variable names in Vprocess_environment mean that | |
1384 | variable should be removed from the environment. */ | |
1385 | *value = NULL; | |
1386 | return 1; | |
1387 | } | |
1388 | } | |
1389 | } | |
1390 | return 0; | |
1391 | } | |
1392 | ||
012c6fcb | 1393 | static int |
a8fe7202 AS |
1394 | getenv_internal (const char *var, int varlen, char **value, int *valuelen, |
1395 | Lisp_Object frame) | |
012c6fcb | 1396 | { |
d2bb6598 SM |
1397 | /* Try to find VAR in Vprocess_environment first. */ |
1398 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1399 | Vprocess_environment)) | |
1400 | return *value ? 1 : 0; | |
f105f403 | 1401 | |
d2bb6598 | 1402 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
de87fb59 | 1403 | if (strcmp (var, "DISPLAY") == 0) |
d2bb6598 SM |
1404 | { |
1405 | Lisp_Object display | |
1406 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); | |
1407 | if (STRINGP (display)) | |
1408 | { | |
51b59d79 | 1409 | *value = SSDATA (display); |
de87fb59 | 1410 | *valuelen = SBYTES (display); |
012c6fcb JA |
1411 | return 1; |
1412 | } | |
d2bb6598 SM |
1413 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
1414 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1415 | Vinitial_environment)) | |
1416 | return *value ? 1 : 0; | |
012c6fcb JA |
1417 | } |
1418 | ||
1419 | return 0; | |
1420 | } | |
1421 | ||
f105f403 | 1422 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
5990851d KL |
1423 | doc: /* Get the value of environment variable VARIABLE. |
1424 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
1425 | the environment. Otherwise, value is a string. | |
f105f403 | 1426 | |
acf20901 | 1427 | This function searches `process-environment' for VARIABLE. |
5990851d | 1428 | |
db699fc6 | 1429 | If optional parameter ENV is a list, then search this list instead of |
acf20901 JB |
1430 | `process-environment', and return t when encountering a negative entry |
1431 | \(an entry for a variable with no value). */) | |
5842a27b | 1432 | (Lisp_Object variable, Lisp_Object env) |
012c6fcb JA |
1433 | { |
1434 | char *value; | |
1435 | int valuelen; | |
1436 | ||
5990851d | 1437 | CHECK_STRING (variable); |
db699fc6 SM |
1438 | if (CONSP (env)) |
1439 | { | |
42a5b22f | 1440 | if (getenv_internal_1 (SSDATA (variable), SBYTES (variable), |
db699fc6 SM |
1441 | &value, &valuelen, env)) |
1442 | return value ? make_string (value, valuelen) : Qt; | |
1443 | else | |
1444 | return Qnil; | |
1445 | } | |
42a5b22f | 1446 | else if (getenv_internal (SSDATA (variable), SBYTES (variable), |
d2bb6598 | 1447 | &value, &valuelen, env)) |
012c6fcb JA |
1448 | return make_string (value, valuelen); |
1449 | else | |
1450 | return Qnil; | |
1451 | } | |
1452 | ||
5990851d KL |
1453 | /* A version of getenv that consults the Lisp environment lists, |
1454 | easily callable from C. */ | |
012c6fcb | 1455 | char * |
a8fe7202 | 1456 | egetenv (const char *var) |
012c6fcb JA |
1457 | { |
1458 | char *value; | |
1459 | int valuelen; | |
1460 | ||
f105f403 | 1461 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
012c6fcb JA |
1462 | return value; |
1463 | else | |
1464 | return 0; | |
1465 | } | |
1466 | ||
80856e74 | 1467 | \f |
8de15d69 | 1468 | /* This is run before init_cmdargs. */ |
177c0ea7 | 1469 | |
dfcf069d | 1470 | void |
971de7fb | 1471 | init_callproc_1 (void) |
8de15d69 RS |
1472 | { |
1473 | char *data_dir = egetenv ("EMACSDATA"); | |
35a2f4b8 KH |
1474 | char *doc_dir = egetenv ("EMACSDOC"); |
1475 | ||
8de15d69 | 1476 | Vdata_directory |
177c0ea7 | 1477 | = Ffile_name_as_directory (build_string (data_dir ? data_dir |
8de15d69 | 1478 | : PATH_DATA)); |
35a2f4b8 KH |
1479 | Vdoc_directory |
1480 | = Ffile_name_as_directory (build_string (doc_dir ? doc_dir | |
1481 | : PATH_DOC)); | |
9453ea7b | 1482 | |
e576cab4 | 1483 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1484 | PATH_EXEC path from epaths.h. */ |
e576cab4 | 1485 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); |
80856e74 JB |
1486 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
1487 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
8de15d69 RS |
1488 | } |
1489 | ||
e17f7533 | 1490 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1491 | |
dfcf069d | 1492 | void |
971de7fb | 1493 | init_callproc (void) |
8de15d69 RS |
1494 | { |
1495 | char *data_dir = egetenv ("EMACSDATA"); | |
177c0ea7 | 1496 | |
8de15d69 RS |
1497 | register char * sh; |
1498 | Lisp_Object tempdir; | |
1499 | ||
9cc4fad5 | 1500 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1501 | { |
05630743 RS |
1502 | /* Add to the path the lib-src subdir of the installation dir. */ |
1503 | Lisp_Object tem; | |
1504 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1505 | Vinstallation_directory); | |
bad95d8f | 1506 | #ifndef DOS_NT |
1a6640ec | 1507 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc | 1508 | if (NILP (Fmember (tem, Vexec_path))) |
70ec1377 RS |
1509 | { |
1510 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); | |
1511 | Vexec_path = Fcons (tem, Vexec_path); | |
1512 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
1513 | } | |
177c0ea7 | 1514 | |
0fa248bc | 1515 | Vexec_directory = Ffile_name_as_directory (tem); |
bad95d8f | 1516 | #endif /* not DOS_NT */ |
8de15d69 | 1517 | |
e17f7533 RS |
1518 | /* Maybe use ../etc as well as ../lib-src. */ |
1519 | if (data_dir == 0) | |
1520 | { | |
1521 | tem = Fexpand_file_name (build_string ("etc"), | |
1522 | Vinstallation_directory); | |
1523 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1524 | } |
1525 | } | |
7e933683 RS |
1526 | |
1527 | /* Look for the files that should be in etc. We don't use | |
1528 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1529 | near the executable, and they are never in the build |
7e933683 RS |
1530 | directory when that's different from the source directory. |
1531 | ||
1532 | Instead, if these files are not in the nominal place, we try the | |
1533 | source directory. */ | |
1534 | if (data_dir == 0) | |
1535 | { | |
70ec1377 | 1536 | Lisp_Object tem, tem1, srcdir; |
7e933683 | 1537 | |
70ec1377 RS |
1538 | srcdir = Fexpand_file_name (build_string ("../src/"), |
1539 | build_string (PATH_DUMPLOADSEARCH)); | |
7e933683 RS |
1540 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); |
1541 | tem1 = Ffile_exists_p (tem); | |
70ec1377 | 1542 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
7e933683 | 1543 | { |
70ec1377 | 1544 | Lisp_Object newdir; |
7e933683 RS |
1545 | newdir = Fexpand_file_name (build_string ("../etc/"), |
1546 | build_string (PATH_DUMPLOADSEARCH)); | |
1547 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1548 | tem1 = Ffile_exists_p (tem); | |
1549 | if (!NILP (tem1)) | |
1550 | Vdata_directory = newdir; | |
1551 | } | |
1552 | } | |
80856e74 | 1553 | |
d883eb62 RS |
1554 | #ifndef CANNOT_DUMP |
1555 | if (initialized) | |
1556 | #endif | |
1557 | { | |
1558 | tempdir = Fdirectory_file_name (Vexec_directory); | |
42a5b22f | 1559 | if (access (SSDATA (tempdir), 0) < 0) |
d883eb62 RS |
1560 | dir_warning ("Warning: arch-dependent data dir (%s) does not exist.\n", |
1561 | Vexec_directory); | |
1562 | } | |
80856e74 | 1563 | |
e576cab4 | 1564 | tempdir = Fdirectory_file_name (Vdata_directory); |
42a5b22f | 1565 | if (access (SSDATA (tempdir), 0) < 0) |
76d5c6cf RS |
1566 | dir_warning ("Warning: arch-independent data dir (%s) does not exist.\n", |
1567 | Vdata_directory); | |
e576cab4 | 1568 | |
e576cab4 | 1569 | sh = (char *) getenv ("SHELL"); |
80856e74 | 1570 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
8abd035b | 1571 | |
40b49d4b JB |
1572 | #ifdef DOS_NT |
1573 | Vshared_game_score_directory = Qnil; | |
1574 | #else | |
63789758 RS |
1575 | Vshared_game_score_directory = build_string (PATH_GAME); |
1576 | if (NILP (Ffile_directory_p (Vshared_game_score_directory))) | |
1577 | Vshared_game_score_directory = Qnil; | |
40b49d4b | 1578 | #endif |
9fefd2ba JB |
1579 | } |
1580 | ||
dfcf069d | 1581 | void |
971de7fb | 1582 | set_initial_environment (void) |
9fefd2ba JB |
1583 | { |
1584 | register char **envp; | |
7bfa6d77 AS |
1585 | #ifdef CANNOT_DUMP |
1586 | Vprocess_environment = Qnil; | |
edfda783 | 1587 | #else |
7bfa6d77 | 1588 | if (initialized) |
edfda783 | 1589 | #endif |
7bfa6d77 | 1590 | { |
a13f8f50 | 1591 | for (envp = environ; *envp; envp++) |
de87fb59 DN |
1592 | Vprocess_environment = Fcons (build_string (*envp), |
1593 | Vprocess_environment); | |
3c33c79a SM |
1594 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent |
1595 | to use `delete' and friends on process-environment. */ | |
1596 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); | |
a13f8f50 | 1597 | } |
80856e74 JB |
1598 | } |
1599 | ||
dfcf069d | 1600 | void |
971de7fb | 1601 | syms_of_callproc (void) |
80856e74 | 1602 | { |
f92d51d8 CY |
1603 | #ifndef DOS_NT |
1604 | Vtemp_file_name_pattern = build_string ("emacsXXXXXX"); | |
1605 | #elif defined (WINDOWSNT) | |
1606 | Vtemp_file_name_pattern = build_string ("emXXXXXX"); | |
1607 | #else | |
1608 | Vtemp_file_name_pattern = build_string ("detmp.XXX"); | |
1609 | #endif | |
1610 | staticpro (&Vtemp_file_name_pattern); | |
1611 | ||
29208e82 | 1612 | DEFVAR_LISP ("shell-file-name", Vshell_file_name, |
fdb82f93 | 1613 | doc: /* *File name to load inferior shells from. |
b20b29be EZ |
1614 | Initialized from the SHELL environment variable, or to a system-dependent |
1615 | default if SHELL is not set. */); | |
80856e74 | 1616 | |
29208e82 | 1617 | DEFVAR_LISP ("exec-path", Vexec_path, |
fdb82f93 PJ |
1618 | doc: /* *List of directories to search programs to run in subprocesses. |
1619 | Each element is a string (directory name) or nil (try default directory). */); | |
80856e74 | 1620 | |
29208e82 | 1621 | DEFVAR_LISP ("exec-suffixes", Vexec_suffixes, |
fdb82f93 PJ |
1622 | doc: /* *List of suffixes to try to find executable file names. |
1623 | Each element is a string. */); | |
33d5af99 | 1624 | Vexec_suffixes = Qnil; |
b81a1b72 | 1625 | |
29208e82 | 1626 | DEFVAR_LISP ("exec-directory", Vexec_directory, |
fdb82f93 PJ |
1627 | doc: /* Directory for executables for Emacs to invoke. |
1628 | More generally, this includes any architecture-dependent files | |
1629 | that are built and installed from the Emacs distribution. */); | |
e576cab4 | 1630 | |
29208e82 | 1631 | DEFVAR_LISP ("data-directory", Vdata_directory, |
fdb82f93 PJ |
1632 | doc: /* Directory of machine-independent files that come with GNU Emacs. |
1633 | These are files intended for Emacs to use while it runs. */); | |
80856e74 | 1634 | |
29208e82 | 1635 | DEFVAR_LISP ("doc-directory", Vdoc_directory, |
fdb82f93 | 1636 | doc: /* Directory containing the DOC file that comes with GNU Emacs. |
ebf24b59 | 1637 | This is usually the same as `data-directory'. */); |
35a2f4b8 | 1638 | |
29208e82 | 1639 | DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory, |
fdb82f93 PJ |
1640 | doc: /* For internal use by the build procedure only. |
1641 | This is the name of the directory in which the build procedure installed | |
ebf24b59 | 1642 | Emacs's info files; the default value for `Info-default-directory-list' |
fdb82f93 | 1643 | includes this. */); |
ed61592a JB |
1644 | Vconfigure_info_directory = build_string (PATH_INFO); |
1645 | ||
29208e82 | 1646 | DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory, |
b065672a CW |
1647 | doc: /* Directory of score files for games which come with GNU Emacs. |
1648 | If this variable is nil, then Emacs is unable to use a shared directory. */); | |
40b49d4b JB |
1649 | #ifdef DOS_NT |
1650 | Vshared_game_score_directory = Qnil; | |
1651 | #else | |
63789758 | 1652 | Vshared_game_score_directory = build_string (PATH_GAME); |
40b49d4b | 1653 | #endif |
b065672a | 1654 | |
29208e82 | 1655 | DEFVAR_LISP ("initial-environment", Vinitial_environment, |
6b8e474c SM |
1656 | doc: /* List of environment variables inherited from the parent process. |
1657 | Each element should be a string of the form ENVVARNAME=VALUE. | |
1658 | The elements must normally be decoded (using `locale-coding-system') for use. */); | |
1659 | Vinitial_environment = Qnil; | |
1660 | ||
29208e82 | 1661 | DEFVAR_LISP ("process-environment", Vprocess_environment, |
5990851d | 1662 | doc: /* List of overridden environment variables for subprocesses to inherit. |
fdb82f93 | 1663 | Each element should be a string of the form ENVVARNAME=VALUE. |
5990851d | 1664 | |
a13f8f50 KL |
1665 | Entries in this list take precedence to those in the frame-local |
1666 | environments. Therefore, let-binding `process-environment' is an easy | |
1667 | way to temporarily change the value of an environment variable, | |
1668 | irrespective of where it comes from. To use `process-environment' to | |
1669 | remove an environment variable, include only its name in the list, | |
1670 | without "=VALUE". | |
5990851d KL |
1671 | |
1672 | This variable is set to nil when Emacs starts. | |
1673 | ||
fdb82f93 PJ |
1674 | If multiple entries define the same variable, the first one always |
1675 | takes precedence. | |
5990851d | 1676 | |
776a24a1 | 1677 | Non-ASCII characters are encoded according to the initial value of |
5990851d KL |
1678 | `locale-coding-system', i.e. the elements must normally be decoded for |
1679 | use. | |
1680 | ||
776a24a1 | 1681 | See `setenv' and `getenv'. */); |
86f5ca04 | 1682 | Vprocess_environment = Qnil; |
80856e74 | 1683 | |
80856e74 | 1684 | defsubr (&Scall_process); |
83fa009c | 1685 | defsubr (&Sgetenv_internal); |
e576cab4 | 1686 | defsubr (&Scall_process_region); |
80856e74 | 1687 | } |