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 |
19ed11ba | 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 | |
0898ca10 JB |
32 | #include "lisp.h" |
33 | ||
bad95d8f RS |
34 | #ifdef WINDOWSNT |
35 | #define NOMINMAX | |
36 | #include <windows.h> | |
489f9371 | 37 | #include "w32.h" |
bad95d8f RS |
38 | #define _P_NOWAIT 1 /* from process.h */ |
39 | #endif | |
40 | ||
7e6c2178 | 41 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
7e6c2178 RS |
42 | #include <sys/stat.h> |
43 | #include <sys/param.h> | |
7e6c2178 RS |
44 | #endif /* MSDOS */ |
45 | ||
80856e74 JB |
46 | #include "commands.h" |
47 | #include "buffer.h" | |
91183bfd | 48 | #include "character.h" |
edf496dd | 49 | #include "ccl.h" |
32d08644 | 50 | #include "coding.h" |
f0b950cf | 51 | #include "composite.h" |
57bda87a | 52 | #include <epaths.h> |
80856e74 | 53 | #include "process.h" |
d177f194 | 54 | #include "syssignal.h" |
a129418f | 55 | #include "systty.h" |
aba637ec | 56 | #include "blockinput.h" |
f105f403 KL |
57 | #include "frame.h" |
58 | #include "termhooks.h" | |
80856e74 | 59 | |
5f027cea EZ |
60 | #ifdef MSDOS |
61 | #include "msdos.h" | |
62 | #endif | |
63 | ||
03695ace | 64 | #ifndef USE_CRT_DLL |
80856e74 JB |
65 | extern char **environ; |
66 | #endif | |
67 | ||
f95c3f91 | 68 | #ifdef HAVE_SETPGID |
58eb6cf0 | 69 | #if !defined (USG) |
320695d8 | 70 | #undef setpgrp |
f95c3f91 GM |
71 | #define setpgrp setpgid |
72 | #endif | |
2b7e8799 | 73 | #endif |
f95c3f91 | 74 | |
f92d51d8 CY |
75 | /* Pattern used by call-process-region to make temp files. */ |
76 | static Lisp_Object Vtemp_file_name_pattern; | |
77 | ||
e0f24100 | 78 | /* True if we are about to fork off a synchronous process or if we |
80856e74 JB |
79 | are waiting for it. */ |
80 | int synch_process_alive; | |
81 | ||
82 | /* Nonzero => this is a string explaining death of synchronous subprocess. */ | |
42ca4633 | 83 | const char *synch_process_death; |
80856e74 | 84 | |
6b61353c KH |
85 | /* Nonzero => this is the signal number that terminated the subprocess. */ |
86 | int synch_process_termsig; | |
87 | ||
80856e74 JB |
88 | /* If synch_process_death is zero, |
89 | this is exit code of synchronous subprocess. */ | |
90 | int synch_process_retcode; | |
f105f403 | 91 | |
80856e74 | 92 | \f |
37d54121 RS |
93 | /* Clean up when exiting Fcall_process. |
94 | On MSDOS, delete the temporary file on any kind of termination. | |
95 | On Unix, kill the process and any children on termination by signal. */ | |
96 | ||
97 | /* Nonzero if this is termination due to exit. */ | |
98 | static int call_process_exited; | |
99 | ||
cd64ea1d | 100 | static Lisp_Object Fgetenv_internal (Lisp_Object, Lisp_Object); |
d2bb6598 | 101 | |
d177f194 | 102 | static Lisp_Object |
971de7fb | 103 | call_process_kill (Lisp_Object fdpid) |
d177f194 | 104 | { |
68c45bf0 | 105 | emacs_close (XFASTINT (Fcar (fdpid))); |
d177f194 JB |
106 | EMACS_KILLPG (XFASTINT (Fcdr (fdpid)), SIGKILL); |
107 | synch_process_alive = 0; | |
108 | return Qnil; | |
109 | } | |
110 | ||
7710357c | 111 | static Lisp_Object |
971de7fb | 112 | call_process_cleanup (Lisp_Object arg) |
80856e74 | 113 | { |
ad3aaf33 AS |
114 | Lisp_Object fdpid = Fcdr (arg); |
115 | #if defined (MSDOS) | |
116 | Lisp_Object file; | |
888c9e86 | 117 | int fd; |
ad3aaf33 AS |
118 | #else |
119 | int pid; | |
120 | #endif | |
121 | ||
122 | Fset_buffer (Fcar (arg)); | |
123 | ||
e39a993c | 124 | #if defined (MSDOS) |
7e6c2178 | 125 | /* for MSDOS fdpid is really (fd . tempfile) */ |
888c9e86 | 126 | fd = XFASTINT (Fcar (fdpid)); |
c1350752 | 127 | file = Fcdr (fdpid); |
888c9e86 EZ |
128 | /* FD is -1 and FILE is "" when we didn't actually create a |
129 | temporary file in call-process. */ | |
130 | if (fd >= 0) | |
131 | emacs_close (fd); | |
132 | if (!(strcmp (SDATA (file), NULL_DEVICE) == 0 || SREF (file, 0) == '\0')) | |
d5db4077 | 133 | unlink (SDATA (file)); |
e39a993c | 134 | #else /* not MSDOS */ |
ad3aaf33 | 135 | pid = XFASTINT (Fcdr (fdpid)); |
d177f194 | 136 | |
37d54121 | 137 | if (call_process_exited) |
6b6e798b | 138 | { |
68c45bf0 | 139 | emacs_close (XFASTINT (Fcar (fdpid))); |
6b6e798b RS |
140 | return Qnil; |
141 | } | |
37d54121 | 142 | |
d177f194 JB |
143 | if (EMACS_KILLPG (pid, SIGINT) == 0) |
144 | { | |
aed13378 | 145 | int count = SPECPDL_INDEX (); |
d177f194 JB |
146 | record_unwind_protect (call_process_kill, fdpid); |
147 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); | |
148 | immediate_quit = 1; | |
149 | QUIT; | |
150 | wait_for_termination (pid); | |
151 | immediate_quit = 0; | |
152 | specpdl_ptr = specpdl + count; /* Discard the unwind protect. */ | |
153 | message1 ("Waiting for process to die...done"); | |
154 | } | |
80856e74 | 155 | synch_process_alive = 0; |
68c45bf0 | 156 | emacs_close (XFASTINT (Fcar (fdpid))); |
7e6c2178 | 157 | #endif /* not MSDOS */ |
80856e74 JB |
158 | return Qnil; |
159 | } | |
160 | ||
a7ca3326 | 161 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, |
fdb82f93 PJ |
162 | doc: /* Call PROGRAM synchronously in separate process. |
163 | The remaining arguments are optional. | |
164 | The program's input comes from file INFILE (nil means `/dev/null'). | |
1ef14cb4 LMI |
165 | Insert output in BUFFER before point; t means current buffer; nil for BUFFER |
166 | means discard it; 0 means discard and don't wait; and `(:file FILE)', where | |
167 | FILE is a file name string, means that it should be written to that file. | |
fdb82f93 PJ |
168 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
169 | REAL-BUFFER says what to do with standard output, as above, | |
170 | while STDERR-FILE says what to do with standard error in the child. | |
171 | STDERR-FILE may be nil (discard standard error output), | |
172 | t (mix it with ordinary output), or a file name string. | |
173 | ||
174 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
175 | Remaining arguments are strings passed as command arguments to PROGRAM. | |
176 | ||
a4feb144 RS |
177 | If executable PROGRAM can't be found as an executable, `call-process' |
178 | signals a Lisp error. `call-process' reports errors in execution of | |
179 | the program only through its return and output. | |
180 | ||
fdb82f93 PJ |
181 | If BUFFER is 0, `call-process' returns immediately with value nil. |
182 | Otherwise it waits for PROGRAM to terminate | |
183 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
184 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
185 | ||
186 | usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */) | |
f66c7cf8 | 187 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 188 | { |
0aa2630f | 189 | Lisp_Object infile, buffer, current_dir, path; |
b9c7f648 | 190 | volatile int display_p_volatile; |
80856e74 JB |
191 | int fd[2]; |
192 | int filefd; | |
193 | register int pid; | |
4da256b1 KS |
194 | #define CALLPROC_BUFFER_SIZE_MIN (16 * 1024) |
195 | #define CALLPROC_BUFFER_SIZE_MAX (4 * CALLPROC_BUFFER_SIZE_MIN) | |
196 | char buf[CALLPROC_BUFFER_SIZE_MAX]; | |
197 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; | |
aed13378 | 198 | int count = SPECPDL_INDEX (); |
3c59b4c9 | 199 | volatile USE_SAFE_ALLOCA; |
2d607244 | 200 | |
1aa83b22 | 201 | register const unsigned char **new_argv; |
39eaa782 RS |
202 | /* File to use for stderr in the child. |
203 | t means use same as standard output. */ | |
204 | Lisp_Object error_file; | |
1ef14cb4 | 205 | Lisp_Object output_file = Qnil; |
7e6c2178 | 206 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
888c9e86 | 207 | char *outf, *tempfile = NULL; |
7e6c2178 | 208 | int outfilefd; |
80856e74 | 209 | #endif |
1ef14cb4 | 210 | int fd_output = -1; |
32d08644 KH |
211 | struct coding_system process_coding; /* coding-system of process output */ |
212 | struct coding_system argument_coding; /* coding-system of arguments */ | |
09494912 RS |
213 | /* Set to the return value of Ffind_operation_coding_system. */ |
214 | Lisp_Object coding_systems; | |
1ef14cb4 | 215 | int output_to_buffer = 1; |
09494912 RS |
216 | |
217 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ | |
218 | coding_systems = Qt; | |
32d08644 | 219 | |
b7826503 | 220 | CHECK_STRING (args[0]); |
80856e74 | 221 | |
39eaa782 RS |
222 | error_file = Qt; |
223 | ||
7e6c2178 RS |
224 | #ifndef subprocesses |
225 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
177c0ea7 | 226 | if (nargs >= 3 |
09ffb8b5 | 227 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
228 | error ("Operating system cannot handle asynchronous subprocesses"); |
229 | #endif /* subprocesses */ | |
230 | ||
09494912 | 231 | /* Decide the coding-system for giving arguments. */ |
32d08644 KH |
232 | { |
233 | Lisp_Object val, *args2; | |
f66c7cf8 | 234 | ptrdiff_t i; |
32d08644 KH |
235 | |
236 | /* If arguments are supplied, we may have to encode them. */ | |
237 | if (nargs >= 5) | |
238 | { | |
30d57b8e | 239 | int must_encode = 0; |
6e50da0a | 240 | Lisp_Object coding_attrs; |
30d57b8e | 241 | |
e7c1c20e | 242 | for (i = 4; i < nargs; i++) |
b7826503 | 243 | CHECK_STRING (args[i]); |
e7c1c20e | 244 | |
a2286b5c | 245 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
246 | if (STRING_MULTIBYTE (args[i])) |
247 | must_encode = 1; | |
248 | ||
beacaab3 KH |
249 | if (!NILP (Vcoding_system_for_write)) |
250 | val = Vcoding_system_for_write; | |
30d57b8e | 251 | else if (! must_encode) |
fcaf8878 | 252 | val = Qraw_text; |
beacaab3 | 253 | else |
32d08644 | 254 | { |
0065d054 | 255 | SAFE_NALLOCA (args2, 1, nargs + 1); |
32d08644 KH |
256 | args2[0] = Qcall_process; |
257 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 258 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 259 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
32d08644 | 260 | } |
fcaf8878 | 261 | val = complement_process_encoding_system (val); |
32d08644 | 262 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); |
6e50da0a KH |
263 | coding_attrs = CODING_ID_ATTRS (argument_coding.id); |
264 | if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs))) | |
265 | { | |
266 | /* We should not use an ASCII incompatible coding system. */ | |
267 | val = raw_text_coding_system (val); | |
268 | setup_coding_system (val, &argument_coding); | |
269 | } | |
32d08644 | 270 | } |
32d08644 KH |
271 | } |
272 | ||
e576cab4 JB |
273 | if (nargs >= 2 && ! NILP (args[1])) |
274 | { | |
4b4deea2 | 275 | infile = Fexpand_file_name (args[1], BVAR (current_buffer, directory)); |
b7826503 | 276 | CHECK_STRING (infile); |
e576cab4 | 277 | } |
80856e74 | 278 | else |
5437e9f9 | 279 | infile = build_string (NULL_DEVICE); |
80856e74 | 280 | |
e576cab4 JB |
281 | if (nargs >= 3) |
282 | { | |
39eaa782 RS |
283 | buffer = args[2]; |
284 | ||
1ef14cb4 LMI |
285 | /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT |
286 | FILE-FOR-STDERR), unless the first element is :file, in which case see | |
287 | the next paragraph. */ | |
19ed11ba AS |
288 | if (CONSP (buffer) |
289 | && (! SYMBOLP (XCAR (buffer)) | |
290 | || strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file"))) | |
39eaa782 | 291 | { |
70949dac | 292 | if (CONSP (XCDR (buffer))) |
45be8a1e | 293 | { |
a9d4f28a | 294 | Lisp_Object stderr_file; |
70949dac | 295 | stderr_file = XCAR (XCDR (buffer)); |
45be8a1e RS |
296 | |
297 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
298 | error_file = stderr_file; | |
299 | else | |
300 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
301 | } | |
302 | ||
70949dac | 303 | buffer = XCAR (buffer); |
39eaa782 | 304 | } |
044512ed | 305 | |
1ef14cb4 | 306 | /* If the buffer is (still) a list, it might be a (:file "file") spec. */ |
19ed11ba AS |
307 | if (CONSP (buffer) |
308 | && SYMBOLP (XCAR (buffer)) | |
309 | && ! strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file")) | |
1ef14cb4 LMI |
310 | { |
311 | output_file = Fexpand_file_name (XCAR (XCDR (buffer)), | |
312 | BVAR (current_buffer, directory)); | |
313 | CHECK_STRING (output_file); | |
314 | buffer = Qnil; | |
315 | } | |
316 | ||
39eaa782 RS |
317 | if (!(EQ (buffer, Qnil) |
318 | || EQ (buffer, Qt) | |
3ffde7d6 | 319 | || INTEGERP (buffer))) |
e576cab4 | 320 | { |
39eaa782 RS |
321 | Lisp_Object spec_buffer; |
322 | spec_buffer = buffer; | |
50fe359b | 323 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
324 | /* Mention the buffer name for a better error message. */ |
325 | if (NILP (buffer)) | |
b7826503 PJ |
326 | CHECK_BUFFER (spec_buffer); |
327 | CHECK_BUFFER (buffer); | |
e576cab4 JB |
328 | } |
329 | } | |
177c0ea7 | 330 | else |
e576cab4 | 331 | buffer = Qnil; |
80856e74 | 332 | |
58616e67 JB |
333 | /* Make sure that the child will be able to chdir to the current |
334 | buffer's current directory, or its unhandled equivalent. We | |
335 | can't just have the child check for an error when it does the | |
336 | chdir, since it's in a vfork. | |
337 | ||
338 | We have to GCPRO around this because Fexpand_file_name, | |
339 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
340 | might call a file name handling function. The argument list is | |
341 | protected by the caller, so all we really have to worry about is | |
342 | buffer. */ | |
343 | { | |
1ef14cb4 | 344 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
58616e67 | 345 | |
4b4deea2 | 346 | current_dir = BVAR (current_buffer, directory); |
58616e67 | 347 | |
1ef14cb4 | 348 | GCPRO5 (infile, buffer, current_dir, error_file, output_file); |
58616e67 | 349 | |
ca319910 SM |
350 | current_dir = Funhandled_file_name_directory (current_dir); |
351 | if (NILP (current_dir)) | |
352 | /* If the file name handler says that current_dir is unreachable, use | |
353 | a sensible default. */ | |
354 | current_dir = build_string ("~/"); | |
355 | current_dir = expand_and_dir_to_file (current_dir, Qnil); | |
db8454b0 CY |
356 | current_dir = Ffile_name_as_directory (current_dir); |
357 | ||
58616e67 JB |
358 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
359 | report_file_error ("Setting current directory", | |
4b4deea2 | 360 | Fcons (BVAR (current_buffer, directory), Qnil)); |
58616e67 | 361 | |
34b87689 KH |
362 | if (STRING_MULTIBYTE (infile)) |
363 | infile = ENCODE_FILE (infile); | |
364 | if (STRING_MULTIBYTE (current_dir)) | |
365 | current_dir = ENCODE_FILE (current_dir); | |
366 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) | |
367 | error_file = ENCODE_FILE (error_file); | |
1ef14cb4 LMI |
368 | if (STRINGP (output_file) && STRING_MULTIBYTE (output_file)) |
369 | output_file = ENCODE_FILE (output_file); | |
58616e67 JB |
370 | UNGCPRO; |
371 | } | |
372 | ||
b9c7f648 | 373 | display_p_volatile = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
80856e74 | 374 | |
42a5b22f | 375 | filefd = emacs_open (SSDATA (infile), O_RDONLY, 0); |
80856e74 JB |
376 | if (filefd < 0) |
377 | { | |
34b87689 | 378 | infile = DECODE_FILE (infile); |
e576cab4 | 379 | report_file_error ("Opening process input file", Fcons (infile, Qnil)); |
80856e74 | 380 | } |
1ef14cb4 LMI |
381 | |
382 | if (STRINGP (output_file)) | |
383 | { | |
384 | #ifdef DOS_NT | |
385 | fd_output = emacs_open (SSDATA (output_file), | |
386 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, | |
387 | S_IREAD | S_IWRITE); | |
388 | #else /* not DOS_NT */ | |
389 | fd_output = creat (SSDATA (output_file), 0666); | |
390 | #endif /* not DOS_NT */ | |
391 | if (fd_output < 0) | |
392 | { | |
393 | output_file = DECODE_FILE (output_file); | |
394 | report_file_error ("Opening process output file", | |
395 | Fcons (output_file, Qnil)); | |
19ed11ba | 396 | } |
1ef14cb4 | 397 | if (STRINGP (error_file) || NILP (error_file)) |
19ed11ba | 398 | output_to_buffer = 0; |
1ef14cb4 LMI |
399 | } |
400 | ||
80856e74 | 401 | /* Search for program; barf if not found. */ |
c52b0b34 | 402 | { |
ad3aaf33 | 403 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
c52b0b34 | 404 | |
ad3aaf33 | 405 | GCPRO4 (infile, buffer, current_dir, error_file); |
5c150961 | 406 | openp (Vexec_path, args[0], Vexec_suffixes, &path, make_number (X_OK)); |
c52b0b34 KH |
407 | UNGCPRO; |
408 | } | |
012c6fcb | 409 | if (NILP (path)) |
80856e74 | 410 | { |
68c45bf0 | 411 | emacs_close (filefd); |
80856e74 JB |
412 | report_file_error ("Searching for program", Fcons (args[0], Qnil)); |
413 | } | |
8ee8f447 RS |
414 | |
415 | /* If program file name starts with /: for quoting a magic name, | |
416 | discard that. */ | |
417 | if (SBYTES (path) > 2 && SREF (path, 0) == '/' | |
418 | && SREF (path, 1) == ':') | |
419 | path = Fsubstring (path, make_number (2), Qnil); | |
420 | ||
3c59b4c9 PE |
421 | SAFE_ALLOCA (new_argv, const unsigned char **, |
422 | (nargs > 4 ? nargs - 2 : 2) * sizeof *new_argv); | |
c364e618 KH |
423 | if (nargs > 4) |
424 | { | |
f66c7cf8 | 425 | ptrdiff_t i; |
ad3aaf33 | 426 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
c364e618 | 427 | |
ad3aaf33 | 428 | GCPRO5 (infile, buffer, current_dir, path, error_file); |
c5bfa12b KH |
429 | argument_coding.dst_multibyte = 0; |
430 | for (i = 4; i < nargs; i++) | |
c364e618 | 431 | { |
c5bfa12b KH |
432 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); |
433 | if (CODING_REQUIRE_ENCODING (&argument_coding)) | |
91183bfd KH |
434 | /* We must encode this argument. */ |
435 | args[i] = encode_coding_string (&argument_coding, args[i], 1); | |
c364e618 | 436 | } |
c5bfa12b | 437 | UNGCPRO; |
1aa83b22 AS |
438 | for (i = 4; i < nargs; i++) |
439 | new_argv[i - 3] = SDATA (args[i]); | |
440 | new_argv[i - 3] = 0; | |
c364e618 | 441 | } |
db54baaa KH |
442 | else |
443 | new_argv[1] = 0; | |
1aa83b22 | 444 | new_argv[0] = SDATA (path); |
80856e74 | 445 | |
7e6c2178 | 446 | #ifdef MSDOS /* MW, July 1993 */ |
7e6c2178 | 447 | |
888c9e86 EZ |
448 | /* If we're redirecting STDOUT to a file, that file is already open |
449 | on fd_output. */ | |
1ef14cb4 | 450 | if (fd_output < 0) |
7e6c2178 | 451 | { |
888c9e86 EZ |
452 | if ((outf = egetenv ("TMPDIR"))) |
453 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); | |
454 | else | |
455 | { | |
456 | tempfile = alloca (20); | |
457 | *tempfile = '\0'; | |
458 | } | |
459 | dostounix_filename (tempfile); | |
460 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') | |
461 | strcat (tempfile, "/"); | |
462 | strcat (tempfile, "detmp.XXX"); | |
463 | mktemp (tempfile); | |
1ef14cb4 LMI |
464 | outfilefd = creat (tempfile, S_IREAD | S_IWRITE); |
465 | if (outfilefd < 0) { | |
466 | emacs_close (filefd); | |
467 | report_file_error ("Opening process output file", | |
468 | Fcons (build_string (tempfile), Qnil)); | |
469 | } | |
7e6c2178 | 470 | } |
1ef14cb4 LMI |
471 | else |
472 | outfilefd = fd_output; | |
6f89d28a | 473 | fd[0] = filefd; |
2610078a | 474 | fd[1] = outfilefd; |
6f89d28a | 475 | #endif /* MSDOS */ |
7e6c2178 | 476 | |
d50d3dc8 | 477 | if (INTEGERP (buffer)) |
68c45bf0 | 478 | fd[1] = emacs_open (NULL_DEVICE, O_WRONLY, 0), fd[0] = -1; |
80856e74 JB |
479 | else |
480 | { | |
7e6c2178 | 481 | #ifndef MSDOS |
db92b288 GM |
482 | errno = 0; |
483 | if (pipe (fd) == -1) | |
484 | { | |
485 | emacs_close (filefd); | |
486 | report_file_error ("Creating process pipe", Qnil); | |
487 | } | |
80856e74 JB |
488 | #endif |
489 | } | |
490 | ||
491 | { | |
492 | /* child_setup must clobber environ in systems with true vfork. | |
493 | Protect it from permanent change. */ | |
494 | register char **save_environ = environ; | |
495 | register int fd1 = fd[1]; | |
39eaa782 | 496 | int fd_error = fd1; |
c0ad4ea5 AS |
497 | #ifdef HAVE_WORKING_VFORK |
498 | sigset_t procmask; | |
499 | sigset_t blocked; | |
500 | struct sigaction sigpipe_action; | |
501 | #endif | |
80856e74 | 502 | |
1ef14cb4 LMI |
503 | if (fd_output >= 0) |
504 | fd1 = fd_output; | |
80856e74 | 505 | #if 0 /* Some systems don't have sigblock. */ |
e065a56e | 506 | mask = sigblock (sigmask (SIGCHLD)); |
80856e74 JB |
507 | #endif |
508 | ||
509 | /* Record that we're about to create a synchronous process. */ | |
510 | synch_process_alive = 1; | |
511 | ||
5c03767e RS |
512 | /* These vars record information from process termination. |
513 | Clear them now before process can possibly terminate, | |
514 | to avoid timing error if process terminates soon. */ | |
515 | synch_process_death = 0; | |
516 | synch_process_retcode = 0; | |
6b61353c | 517 | synch_process_termsig = 0; |
5c03767e | 518 | |
39eaa782 | 519 | if (NILP (error_file)) |
68c45bf0 | 520 | fd_error = emacs_open (NULL_DEVICE, O_WRONLY, 0); |
39eaa782 RS |
521 | else if (STRINGP (error_file)) |
522 | { | |
523 | #ifdef DOS_NT | |
42a5b22f | 524 | fd_error = emacs_open (SSDATA (error_file), |
68c45bf0 PE |
525 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, |
526 | S_IREAD | S_IWRITE); | |
39eaa782 | 527 | #else /* not DOS_NT */ |
42a5b22f | 528 | fd_error = creat (SSDATA (error_file), 0666); |
39eaa782 RS |
529 | #endif /* not DOS_NT */ |
530 | } | |
531 | ||
532 | if (fd_error < 0) | |
533 | { | |
68c45bf0 | 534 | emacs_close (filefd); |
6f89d28a | 535 | if (fd[0] != filefd) |
68c45bf0 | 536 | emacs_close (fd[0]); |
39eaa782 | 537 | if (fd1 >= 0) |
68c45bf0 | 538 | emacs_close (fd1); |
6f89d28a MB |
539 | #ifdef MSDOS |
540 | unlink (tempfile); | |
541 | #endif | |
34b87689 KH |
542 | if (NILP (error_file)) |
543 | error_file = build_string (NULL_DEVICE); | |
544 | else if (STRINGP (error_file)) | |
545 | error_file = DECODE_FILE (error_file); | |
546 | report_file_error ("Cannot redirect stderr", Fcons (error_file, Qnil)); | |
39eaa782 | 547 | } |
89e1ec1d | 548 | |
2610078a | 549 | #ifdef MSDOS /* MW, July 1993 */ |
c17c4250 | 550 | /* Note that on MSDOS `child_setup' actually returns the child process |
2610078a KH |
551 | exit status, not its PID, so we assign it to `synch_process_retcode' |
552 | below. */ | |
c17c4250 EZ |
553 | pid = child_setup (filefd, outfilefd, fd_error, (char **) new_argv, |
554 | 0, current_dir); | |
39eaa782 | 555 | |
2610078a KH |
556 | /* Record that the synchronous process exited and note its |
557 | termination status. */ | |
558 | synch_process_alive = 0; | |
559 | synch_process_retcode = pid; | |
560 | if (synch_process_retcode < 0) /* means it couldn't be exec'ed */ | |
68c45bf0 | 561 | { |
ca9c0567 | 562 | synchronize_system_messages_locale (); |
68c45bf0 PE |
563 | synch_process_death = strerror (errno); |
564 | } | |
2610078a | 565 | |
68c45bf0 | 566 | emacs_close (outfilefd); |
2610078a | 567 | if (fd_error != outfilefd) |
68c45bf0 | 568 | emacs_close (fd_error); |
2610078a | 569 | fd1 = -1; /* No harm in closing that one! */ |
888c9e86 | 570 | if (tempfile) |
2610078a | 571 | { |
888c9e86 EZ |
572 | /* Since CRLF is converted to LF within `decode_coding', we |
573 | can always open a file with binary mode. */ | |
574 | fd[0] = emacs_open (tempfile, O_RDONLY | O_BINARY, 0); | |
575 | if (fd[0] < 0) | |
576 | { | |
577 | unlink (tempfile); | |
578 | emacs_close (filefd); | |
579 | report_file_error ("Cannot re-open temporary file", | |
7285dc67 | 580 | Fcons (build_string (tempfile), Qnil)); |
888c9e86 | 581 | } |
2610078a | 582 | } |
888c9e86 EZ |
583 | else |
584 | fd[0] = -1; /* We are not going to read from tempfile. */ | |
2610078a | 585 | #else /* not MSDOS */ |
bad95d8f | 586 | #ifdef WINDOWSNT |
2d607244 RS |
587 | pid = child_setup (filefd, fd1, fd_error, (char **) new_argv, |
588 | 0, current_dir); | |
bad95d8f | 589 | #else /* not WINDOWSNT */ |
c0ad4ea5 AS |
590 | |
591 | #ifdef HAVE_WORKING_VFORK | |
592 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', | |
593 | this sets the parent's signal handlers as well as the child's. | |
594 | So delay all interrupts whose handlers the child might munge, | |
595 | and record the current handlers so they can be restored later. */ | |
596 | sigemptyset (&blocked); | |
597 | sigaddset (&blocked, SIGPIPE); | |
598 | sigaction (SIGPIPE, 0, &sigpipe_action); | |
123403e4 | 599 | pthread_sigmask (SIG_BLOCK, &blocked, &procmask); |
c0ad4ea5 AS |
600 | #endif |
601 | ||
aba637ec KS |
602 | BLOCK_INPUT; |
603 | ||
db6c0e74 | 604 | /* vfork, and prevent local vars from being clobbered by the vfork. */ |
b08a63cc | 605 | { |
5266b4bb | 606 | int volatile fd1_volatile = fd1; |
db6c0e74 PE |
607 | int volatile fd_error_volatile = fd_error; |
608 | int volatile fd_output_volatile = fd_output; | |
609 | int volatile output_to_buffer_volatile = output_to_buffer; | |
610 | unsigned char const **volatile new_argv_volatile = new_argv; | |
80856e74 | 611 | |
db6c0e74 | 612 | pid = vfork (); |
80856e74 | 613 | |
5266b4bb | 614 | fd1 = fd1_volatile; |
db6c0e74 PE |
615 | fd_error = fd_error_volatile; |
616 | fd_output = fd_output_volatile; | |
617 | output_to_buffer = output_to_buffer_volatile; | |
618 | new_argv = new_argv_volatile; | |
619 | } | |
b9c7f648 | 620 | |
80856e74 JB |
621 | if (pid == 0) |
622 | { | |
623 | if (fd[0] >= 0) | |
68c45bf0 | 624 | emacs_close (fd[0]); |
1e7963c7 | 625 | #ifdef HAVE_SETSID |
19ed11ba | 626 | setsid (); |
1e7963c7 | 627 | #endif |
58eb6cf0 | 628 | #if defined (USG) |
19ed11ba | 629 | setpgrp (); |
80856e74 | 630 | #else |
19ed11ba | 631 | setpgrp (pid, pid); |
80856e74 | 632 | #endif /* USG */ |
c0ad4ea5 | 633 | |
2f9a22e2 | 634 | /* GConf causes us to ignore SIGPIPE, make sure it is restored |
c0ad4ea5 | 635 | in the child. */ |
2f9a22e2 | 636 | //signal (SIGPIPE, SIG_DFL); |
c0ad4ea5 | 637 | #ifdef HAVE_WORKING_VFORK |
123403e4 | 638 | pthread_sigmask (SIG_SETMASK, &procmask, 0); |
c0ad4ea5 AS |
639 | #endif |
640 | ||
2d607244 RS |
641 | child_setup (filefd, fd1, fd_error, (char **) new_argv, |
642 | 0, current_dir); | |
80856e74 | 643 | } |
aba637ec KS |
644 | |
645 | UNBLOCK_INPUT; | |
c0ad4ea5 AS |
646 | |
647 | #ifdef HAVE_WORKING_VFORK | |
648 | /* Restore the signal state. */ | |
649 | sigaction (SIGPIPE, &sigpipe_action, 0); | |
123403e4 | 650 | pthread_sigmask (SIG_SETMASK, &procmask, 0); |
c0ad4ea5 AS |
651 | #endif |
652 | ||
bad95d8f | 653 | #endif /* not WINDOWSNT */ |
cd5f8f60 RS |
654 | |
655 | /* The MSDOS case did this already. */ | |
656 | if (fd_error >= 0) | |
68c45bf0 | 657 | emacs_close (fd_error); |
2610078a | 658 | #endif /* not MSDOS */ |
80856e74 | 659 | |
80856e74 JB |
660 | environ = save_environ; |
661 | ||
6b6e798b RS |
662 | /* Close most of our fd's, but not fd[0] |
663 | since we will use that to read input from. */ | |
68c45bf0 | 664 | emacs_close (filefd); |
1ef14cb4 LMI |
665 | if (fd_output >= 0) |
666 | emacs_close (fd_output); | |
799abb26 | 667 | if (fd1 >= 0 && fd1 != fd_error) |
68c45bf0 | 668 | emacs_close (fd1); |
80856e74 JB |
669 | } |
670 | ||
671 | if (pid < 0) | |
672 | { | |
6b6e798b | 673 | if (fd[0] >= 0) |
68c45bf0 | 674 | emacs_close (fd[0]); |
80856e74 JB |
675 | report_file_error ("Doing vfork", Qnil); |
676 | } | |
677 | ||
d50d3dc8 | 678 | if (INTEGERP (buffer)) |
80856e74 | 679 | { |
6b6e798b | 680 | if (fd[0] >= 0) |
68c45bf0 | 681 | emacs_close (fd[0]); |
80856e74 JB |
682 | return Qnil; |
683 | } | |
684 | ||
6b6e798b | 685 | /* Enable sending signal if user quits below. */ |
37d54121 RS |
686 | call_process_exited = 0; |
687 | ||
e39a993c | 688 | #if defined(MSDOS) |
7e6c2178 RS |
689 | /* MSDOS needs different cleanup information. */ |
690 | record_unwind_protect (call_process_cleanup, | |
ad3aaf33 AS |
691 | Fcons (Fcurrent_buffer (), |
692 | Fcons (make_number (fd[0]), | |
888c9e86 | 693 | build_string (tempfile ? tempfile : "")))); |
7e6c2178 | 694 | #else |
80856e74 | 695 | record_unwind_protect (call_process_cleanup, |
ad3aaf33 AS |
696 | Fcons (Fcurrent_buffer (), |
697 | Fcons (make_number (fd[0]), make_number (pid)))); | |
e39a993c | 698 | #endif /* not MSDOS */ |
80856e74 JB |
699 | |
700 | ||
d50d3dc8 | 701 | if (BUFFERP (buffer)) |
80856e74 JB |
702 | Fset_buffer (buffer); |
703 | ||
09494912 RS |
704 | if (NILP (buffer)) |
705 | { | |
706 | /* If BUFFER is nil, we must read process output once and then | |
707 | discard it, so setup coding system but with nil. */ | |
708 | setup_coding_system (Qnil, &process_coding); | |
709 | } | |
710 | else | |
711 | { | |
712 | Lisp_Object val, *args2; | |
713 | ||
714 | val = Qnil; | |
715 | if (!NILP (Vcoding_system_for_read)) | |
716 | val = Vcoding_system_for_read; | |
717 | else | |
718 | { | |
719 | if (EQ (coding_systems, Qt)) | |
720 | { | |
f66c7cf8 | 721 | ptrdiff_t i; |
09494912 | 722 | |
0065d054 | 723 | SAFE_NALLOCA (args2, 1, nargs + 1); |
09494912 RS |
724 | args2[0] = Qcall_process; |
725 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
726 | coding_systems | |
727 | = Ffind_operation_coding_system (nargs + 1, args2); | |
728 | } | |
729 | if (CONSP (coding_systems)) | |
70949dac | 730 | val = XCAR (coding_systems); |
09494912 | 731 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 732 | val = XCAR (Vdefault_process_coding_system); |
09494912 RS |
733 | else |
734 | val = Qnil; | |
735 | } | |
91183bfd | 736 | Fcheck_coding_system (val); |
09494912 RS |
737 | /* In unibyte mode, character code conversion should not take |
738 | place but EOL conversion should. So, setup raw-text or one | |
739 | of the subsidiary according to the information just setup. */ | |
4b4deea2 | 740 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
09494912 | 741 | && !NILP (val)) |
91183bfd KH |
742 | val = raw_text_coding_system (val); |
743 | setup_coding_system (val, &process_coding); | |
09494912 RS |
744 | } |
745 | ||
80856e74 JB |
746 | immediate_quit = 1; |
747 | QUIT; | |
748 | ||
1ef14cb4 | 749 | if (output_to_buffer) |
19ed11ba AS |
750 | { |
751 | register EMACS_INT nread; | |
752 | int first = 1; | |
753 | EMACS_INT total_read = 0; | |
754 | int carryover = 0; | |
755 | int display_p = display_p_volatile; | |
756 | int display_on_the_fly = display_p; | |
757 | struct coding_system saved_coding; | |
758 | ||
759 | saved_coding = process_coding; | |
760 | while (1) | |
761 | { | |
762 | /* Repeatedly read until we've filled as much as possible | |
763 | of the buffer size we have. But don't read | |
764 | less than 1024--save that for the next bufferful. */ | |
765 | nread = carryover; | |
766 | while (nread < bufsize - 1024) | |
767 | { | |
768 | int this_read = emacs_read (fd[0], buf + nread, | |
769 | bufsize - nread); | |
60558b19 | 770 | |
19ed11ba AS |
771 | if (this_read < 0) |
772 | goto give_up; | |
60558b19 | 773 | |
19ed11ba AS |
774 | if (this_read == 0) |
775 | { | |
776 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
777 | break; | |
778 | } | |
60558b19 | 779 | |
19ed11ba AS |
780 | nread += this_read; |
781 | total_read += this_read; | |
60558b19 | 782 | |
19ed11ba AS |
783 | if (display_on_the_fly) |
784 | break; | |
785 | } | |
60558b19 | 786 | |
19ed11ba AS |
787 | /* Now NREAD is the total amount of data in the buffer. */ |
788 | immediate_quit = 0; | |
177c0ea7 | 789 | |
19ed11ba AS |
790 | if (!NILP (buffer)) |
791 | { | |
792 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) | |
793 | && ! CODING_MAY_REQUIRE_DECODING (&process_coding)) | |
794 | insert_1_both (buf, nread, nread, 0, 1, 0); | |
795 | else | |
796 | { /* We have to decode the input. */ | |
797 | Lisp_Object curbuf; | |
798 | int count1 = SPECPDL_INDEX (); | |
799 | ||
800 | XSETBUFFER (curbuf, current_buffer); | |
801 | /* We cannot allow after-change-functions be run | |
802 | during decoding, because that might modify the | |
803 | buffer, while we rely on process_coding.produced to | |
804 | faithfully reflect inserted text until we | |
805 | TEMP_SET_PT_BOTH below. */ | |
806 | specbind (Qinhibit_modification_hooks, Qt); | |
807 | decode_coding_c_string (&process_coding, | |
808 | (unsigned char *) buf, nread, curbuf); | |
809 | unbind_to (count1, Qnil); | |
810 | if (display_on_the_fly | |
811 | && CODING_REQUIRE_DETECTION (&saved_coding) | |
812 | && ! CODING_REQUIRE_DETECTION (&process_coding)) | |
813 | { | |
814 | /* We have detected some coding system. But, | |
815 | there's a possibility that the detection was | |
816 | done by insufficient data. So, we give up | |
817 | displaying on the fly. */ | |
818 | if (process_coding.produced > 0) | |
819 | del_range_2 (process_coding.dst_pos, | |
820 | process_coding.dst_pos_byte, | |
821 | process_coding.dst_pos | |
822 | + process_coding.produced_char, | |
823 | process_coding.dst_pos_byte | |
824 | + process_coding.produced, 0); | |
825 | display_on_the_fly = 0; | |
826 | process_coding = saved_coding; | |
827 | carryover = nread; | |
828 | /* This is to make the above condition always | |
829 | fails in the future. */ | |
830 | saved_coding.common_flags | |
831 | &= ~CODING_REQUIRE_DETECTION_MASK; | |
832 | continue; | |
833 | } | |
834 | ||
835 | TEMP_SET_PT_BOTH (PT + process_coding.produced_char, | |
836 | PT_BYTE + process_coding.produced); | |
837 | carryover = process_coding.carryover_bytes; | |
838 | if (carryover > 0) | |
839 | memcpy (buf, process_coding.carryover, | |
840 | process_coding.carryover_bytes); | |
841 | } | |
842 | } | |
c5bfa12b | 843 | |
19ed11ba AS |
844 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
845 | break; | |
6e3bfbb2 | 846 | |
19ed11ba AS |
847 | /* Make the buffer bigger as we continue to read more data, |
848 | but not past CALLPROC_BUFFER_SIZE_MAX. */ | |
849 | if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) | |
850 | if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) | |
851 | bufsize = CALLPROC_BUFFER_SIZE_MAX; | |
6e3bfbb2 | 852 | |
19ed11ba AS |
853 | if (display_p) |
854 | { | |
855 | if (first) | |
856 | prepare_menu_bars (); | |
857 | first = 0; | |
858 | redisplay_preserve_echo_area (1); | |
859 | /* This variable might have been set to 0 for code | |
860 | detection. In that case, we set it back to 1 because | |
861 | we should have already detected a coding system. */ | |
862 | display_on_the_fly = 1; | |
863 | } | |
864 | immediate_quit = 1; | |
865 | QUIT; | |
866 | } | |
867 | give_up: ; | |
868 | ||
869 | Vlast_coding_system_used = CODING_ID_NAME (process_coding.id); | |
870 | /* If the caller required, let the buffer inherit the | |
871 | coding-system used to decode the process output. */ | |
872 | if (inherit_process_coding_system) | |
873 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
874 | make_number (total_read)); | |
875 | } | |
3b440bb5 | 876 | |
77defa9a | 877 | #ifndef MSDOS |
80856e74 | 878 | /* Wait for it to terminate, unless it already has. */ |
1ef14cb4 LMI |
879 | if (output_to_buffer) |
880 | wait_for_termination (pid); | |
881 | else | |
882 | interruptible_wait_for_termination (pid); | |
77defa9a | 883 | #endif |
80856e74 JB |
884 | |
885 | immediate_quit = 0; | |
886 | ||
37d54121 RS |
887 | /* Don't kill any children that the subprocess may have left behind |
888 | when exiting. */ | |
889 | call_process_exited = 1; | |
890 | ||
3c59b4c9 | 891 | SAFE_FREE (); |
80856e74 JB |
892 | unbind_to (count, Qnil); |
893 | ||
6b61353c KH |
894 | if (synch_process_termsig) |
895 | { | |
42ca4633 | 896 | const char *signame; |
6b61353c KH |
897 | |
898 | synchronize_system_messages_locale (); | |
899 | signame = strsignal (synch_process_termsig); | |
900 | ||
901 | if (signame == 0) | |
19ed11ba | 902 | signame = "unknown"; |
6b61353c KH |
903 | |
904 | synch_process_death = signame; | |
905 | } | |
906 | ||
80856e74 | 907 | if (synch_process_death) |
68c45bf0 PE |
908 | return code_convert_string_norecord (build_string (synch_process_death), |
909 | Vlocale_coding_system, 0); | |
80856e74 JB |
910 | return make_number (synch_process_retcode); |
911 | } | |
80856e74 | 912 | \f |
9fefd2ba | 913 | static Lisp_Object |
971de7fb | 914 | delete_temp_file (Lisp_Object name) |
80856e74 | 915 | { |
1a271e14 KR |
916 | /* Suppress jka-compr handling, etc. */ |
917 | int count = SPECPDL_INDEX (); | |
918 | specbind (intern ("file-name-handler-alist"), Qnil); | |
f1a5d776 | 919 | internal_delete_file (name); |
1a271e14 | 920 | unbind_to (count, Qnil); |
320695d8 | 921 | return Qnil; |
80856e74 JB |
922 | } |
923 | ||
924 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
fdb82f93 PJ |
925 | 3, MANY, 0, |
926 | doc: /* Send text from START to END to a synchronous process running PROGRAM. | |
927 | The remaining arguments are optional. | |
928 | Delete the text if fourth arg DELETE is non-nil. | |
929 | ||
1ef14cb4 LMI |
930 | Insert output in BUFFER before point; t means current buffer; nil for |
931 | BUFFER means discard it; 0 means discard and don't wait; and `(:file | |
932 | FILE)', where FILE is a file name string, means that it should be | |
933 | written to that file. | |
fdb82f93 PJ |
934 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
935 | REAL-BUFFER says what to do with standard output, as above, | |
936 | while STDERR-FILE says what to do with standard error in the child. | |
937 | STDERR-FILE may be nil (discard standard error output), | |
938 | t (mix it with ordinary output), or a file name string. | |
939 | ||
940 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
941 | Remaining args are passed to PROGRAM at startup as command args. | |
942 | ||
ba9a5174 | 943 | If BUFFER is 0, `call-process-region' returns immediately with value nil. |
fdb82f93 PJ |
944 | Otherwise it waits for PROGRAM to terminate |
945 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
946 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
947 | ||
948 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) | |
f66c7cf8 | 949 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 950 | { |
39323a7e KH |
951 | struct gcpro gcpro1; |
952 | Lisp_Object filename_string; | |
953 | register Lisp_Object start, end; | |
aed13378 | 954 | int count = SPECPDL_INDEX (); |
08ee4e87 | 955 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
09494912 | 956 | Lisp_Object coding_systems; |
32d08644 | 957 | Lisp_Object val, *args2; |
f66c7cf8 | 958 | ptrdiff_t i; |
7e6c2178 | 959 | char *tempfile; |
f92d51d8 | 960 | Lisp_Object tmpdir, pattern; |
7e6c2178 | 961 | |
f92d51d8 CY |
962 | if (STRINGP (Vtemporary_file_directory)) |
963 | tmpdir = Vtemporary_file_directory; | |
7e6c2178 RS |
964 | else |
965 | { | |
f92d51d8 CY |
966 | #ifndef DOS_NT |
967 | if (getenv ("TMPDIR")) | |
968 | tmpdir = build_string (getenv ("TMPDIR")); | |
969 | else | |
970 | tmpdir = build_string ("/tmp/"); | |
971 | #else /* DOS_NT */ | |
972 | char *outf; | |
973 | if ((outf = egetenv ("TMPDIR")) | |
974 | || (outf = egetenv ("TMP")) | |
975 | || (outf = egetenv ("TEMP"))) | |
976 | tmpdir = build_string (outf); | |
977 | else | |
978 | tmpdir = Ffile_name_as_directory (build_string ("c:/temp")); | |
0774fcf8 | 979 | #endif |
f92d51d8 | 980 | } |
7e6c2178 | 981 | |
3c59b4c9 PE |
982 | { |
983 | USE_SAFE_ALLOCA; | |
984 | pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir); | |
985 | SAFE_ALLOCA (tempfile, char *, SBYTES (pattern) + 1); | |
986 | memcpy (tempfile, SDATA (pattern), SBYTES (pattern) + 1); | |
987 | coding_systems = Qt; | |
09494912 | 988 | |
1ddc85a4 | 989 | #ifdef HAVE_MKSTEMP |
3c59b4c9 PE |
990 | { |
991 | int fd; | |
992 | ||
993 | BLOCK_INPUT; | |
994 | fd = mkstemp (tempfile); | |
995 | UNBLOCK_INPUT; | |
996 | if (fd == -1) | |
997 | report_file_error ("Failed to open temporary file", | |
998 | Fcons (Vtemp_file_name_pattern, Qnil)); | |
999 | else | |
1000 | close (fd); | |
1001 | } | |
1ddc85a4 | 1002 | #else |
3c59b4c9 | 1003 | mktemp (tempfile); |
1ddc85a4 | 1004 | #endif |
80856e74 | 1005 | |
3c59b4c9 PE |
1006 | filename_string = build_string (tempfile); |
1007 | GCPRO1 (filename_string); | |
1008 | SAFE_FREE (); | |
1009 | } | |
1010 | ||
80856e74 JB |
1011 | start = args[0]; |
1012 | end = args[1]; | |
32d08644 | 1013 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
1014 | if (!NILP (Vcoding_system_for_write)) |
1015 | val = Vcoding_system_for_write; | |
4b4deea2 | 1016 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
fcaf8878 | 1017 | val = Qraw_text; |
32d08644 | 1018 | else |
beacaab3 | 1019 | { |
3c59b4c9 | 1020 | USE_SAFE_ALLOCA; |
0065d054 | 1021 | SAFE_NALLOCA (args2, 1, nargs + 1); |
91489411 RS |
1022 | args2[0] = Qcall_process_region; |
1023 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1024 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); | |
fcaf8878 | 1025 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
3c59b4c9 | 1026 | SAFE_FREE (); |
beacaab3 | 1027 | } |
fcaf8878 | 1028 | val = complement_process_encoding_system (val); |
32d08644 | 1029 | |
168afdaa | 1030 | { |
aed13378 | 1031 | int count1 = SPECPDL_INDEX (); |
168afdaa RS |
1032 | |
1033 | specbind (intern ("coding-system-for-write"), val); | |
bb951f0e KR |
1034 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
1035 | happen to get a ".Z" suffix. */ | |
1036 | specbind (intern ("file-name-handler-alist"), Qnil); | |
168afdaa RS |
1037 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil); |
1038 | ||
1039 | unbind_to (count1, Qnil); | |
1040 | } | |
91489411 | 1041 | |
177c0ea7 | 1042 | /* Note that Fcall_process takes care of binding |
91489411 | 1043 | coding-system-for-read. */ |
093650fe | 1044 | |
80856e74 JB |
1045 | record_unwind_protect (delete_temp_file, filename_string); |
1046 | ||
edf496dd | 1047 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
1048 | Fdelete_region (start, end); |
1049 | ||
edf496dd KH |
1050 | if (nargs > 3) |
1051 | { | |
1052 | args += 2; | |
1053 | nargs -= 2; | |
1054 | } | |
1055 | else | |
1056 | { | |
1057 | args[0] = args[2]; | |
1058 | nargs = 2; | |
1059 | } | |
1060 | args[1] = filename_string; | |
80856e74 | 1061 | |
edf496dd | 1062 | RETURN_UNGCPRO (unbind_to (count, Fcall_process (nargs, args))); |
80856e74 JB |
1063 | } |
1064 | \f | |
361358ea | 1065 | #ifndef WINDOWSNT |
971de7fb | 1066 | static int relocate_fd (int fd, int minfd); |
361358ea | 1067 | #endif |
dfcf069d | 1068 | |
5990851d KL |
1069 | static char ** |
1070 | add_env (char **env, char **new_env, char *string) | |
1071 | { | |
1072 | char **ep; | |
1073 | int ok = 1; | |
1074 | if (string == NULL) | |
1075 | return new_env; | |
1076 | ||
1077 | /* See if this string duplicates any string already in the env. | |
1078 | If so, don't put it in. | |
1079 | When an env var has multiple definitions, | |
1080 | we keep the definition that comes first in process-environment. */ | |
1081 | for (ep = env; ok && ep != new_env; ep++) | |
1082 | { | |
1083 | char *p = *ep, *q = string; | |
1084 | while (ok) | |
19ed11ba AS |
1085 | { |
1086 | if (*q != *p) | |
1087 | break; | |
1088 | if (*q == 0) | |
1089 | /* The string is a lone variable name; keep it for now, we | |
1090 | will remove it later. It is a placeholder for a | |
1091 | variable that is not to be included in the environment. */ | |
1092 | break; | |
1093 | if (*q == '=') | |
1094 | ok = 0; | |
1095 | p++, q++; | |
1096 | } | |
5990851d KL |
1097 | } |
1098 | if (ok) | |
1099 | *new_env++ = string; | |
1100 | return new_env; | |
1101 | } | |
1102 | ||
80856e74 JB |
1103 | /* This is the last thing run in a newly forked inferior |
1104 | either synchronous or asynchronous. | |
1105 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
1106 | Initialize inferior's priority, pgrp, connected dir and environment. | |
1107 | then exec another program based on new_argv. | |
1108 | ||
1109 | This function may change environ for the superior process. | |
1110 | Therefore, the superior process must save and restore the value | |
1111 | of environ around the vfork and the call to this function. | |
1112 | ||
80856e74 | 1113 | SET_PGRP is nonzero if we should put the subprocess into a separate |
177c0ea7 | 1114 | process group. |
e576cab4 JB |
1115 | |
1116 | CURRENT_DIR is an elisp string giving the path of the current | |
1117 | directory the subprocess should have. Since we can't really signal | |
1118 | a decent error from within the child, this should be verified as an | |
1119 | executable directory by the parent. */ | |
80856e74 | 1120 | |
dfcf069d | 1121 | int |
971de7fb | 1122 | child_setup (int in, int out, int err, register char **new_argv, int set_pgrp, Lisp_Object current_dir) |
80856e74 | 1123 | { |
e576cab4 | 1124 | char **env; |
7fcf7f05 | 1125 | char *pwd_var; |
bad95d8f RS |
1126 | #ifdef WINDOWSNT |
1127 | int cpid; | |
4252a4bd | 1128 | HANDLE handles[3]; |
bad95d8f | 1129 | #endif /* WINDOWSNT */ |
e576cab4 | 1130 | |
33abe2d9 | 1131 | int pid = getpid (); |
80856e74 | 1132 | |
80856e74 JB |
1133 | /* Close Emacs's descriptors that this process should not have. */ |
1134 | close_process_descs (); | |
ded80a25 | 1135 | |
c17c4250 EZ |
1136 | /* DOS_NT isn't in a vfork, so if we are in the middle of load-file, |
1137 | we will lose if we call close_load_descs here. */ | |
1138 | #ifndef DOS_NT | |
4458cebe | 1139 | close_load_descs (); |
c17c4250 | 1140 | #endif |
80856e74 JB |
1141 | |
1142 | /* Note that use of alloca is always safe here. It's obvious for systems | |
1143 | that do not have true vfork or that have true (stack) alloca. | |
caa01fe0 GM |
1144 | If using vfork and C_ALLOCA (when Emacs used to include |
1145 | src/alloca.c) it is safe because that changes the superior's | |
1146 | static variables as if the superior had done alloca and will be | |
1147 | cleaned up in the usual way. */ | |
e576cab4 | 1148 | { |
7fcf7f05 | 1149 | register char *temp; |
0065d054 | 1150 | size_t i; /* size_t, because ptrdiff_t might overflow here! */ |
77d78be1 | 1151 | |
d5db4077 | 1152 | i = SBYTES (current_dir); |
16425c4a EZ |
1153 | #ifdef MSDOS |
1154 | /* MSDOS must have all environment variables malloc'ed, because | |
1155 | low-level libc functions that launch subsidiary processes rely | |
1156 | on that. */ | |
1157 | pwd_var = (char *) xmalloc (i + 6); | |
1158 | #else | |
7fcf7f05 | 1159 | pwd_var = (char *) alloca (i + 6); |
16425c4a | 1160 | #endif |
7fcf7f05 | 1161 | temp = pwd_var + 4; |
72af86bd AS |
1162 | memcpy (pwd_var, "PWD=", 4); |
1163 | memcpy (temp, SDATA (current_dir), i); | |
bad95d8f | 1164 | if (!IS_DIRECTORY_SEP (temp[i - 1])) temp[i++] = DIRECTORY_SEP; |
e576cab4 JB |
1165 | temp[i] = 0; |
1166 | ||
c17c4250 | 1167 | #ifndef DOS_NT |
e576cab4 JB |
1168 | /* We can't signal an Elisp error here; we're in a vfork. Since |
1169 | the callers check the current directory before forking, this | |
1170 | should only return an error if the directory's permissions | |
1171 | are changed between the check and this chdir, but we should | |
1172 | at least check. */ | |
1173 | if (chdir (temp) < 0) | |
20b25e46 | 1174 | _exit (errno); |
f8d23104 | 1175 | #else /* DOS_NT */ |
c17c4250 EZ |
1176 | /* Get past the drive letter, so that d:/ is left alone. */ |
1177 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
1178 | { | |
1179 | temp += 2; | |
1180 | i -= 2; | |
1181 | } | |
f8d23104 | 1182 | #endif /* DOS_NT */ |
c17c4250 | 1183 | |
7fcf7f05 | 1184 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 1185 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 1186 | temp[--i] = 0; |
e576cab4 | 1187 | } |
80856e74 | 1188 | |
5990851d | 1189 | /* Set `env' to a vector of the strings in the environment. */ |
80856e74 JB |
1190 | { |
1191 | register Lisp_Object tem; | |
1192 | register char **new_env; | |
5990851d | 1193 | char **p, **q; |
80856e74 | 1194 | register int new_length; |
d2bb6598 | 1195 | Lisp_Object display = Qnil; |
361358ea | 1196 | |
80856e74 | 1197 | new_length = 0; |
f105f403 | 1198 | |
80856e74 | 1199 | for (tem = Vprocess_environment; |
19ed11ba AS |
1200 | CONSP (tem) && STRINGP (XCAR (tem)); |
1201 | tem = XCDR (tem)) | |
d2bb6598 | 1202 | { |
42a5b22f | 1203 | if (strncmp (SSDATA (XCAR (tem)), "DISPLAY", 7) == 0 |
d2bb6598 SM |
1204 | && (SDATA (XCAR (tem)) [7] == '\0' |
1205 | || SDATA (XCAR (tem)) [7] == '=')) | |
1206 | /* DISPLAY is specified in process-environment. */ | |
1207 | display = Qt; | |
1208 | new_length++; | |
1209 | } | |
de87fb59 | 1210 | |
d2bb6598 SM |
1211 | /* If not provided yet, use the frame's DISPLAY. */ |
1212 | if (NILP (display)) | |
1213 | { | |
1214 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); | |
1215 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) | |
1216 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1217 | tmp = Fgetenv_internal (build_string ("DISPLAY"), | |
1218 | Vinitial_environment); | |
1219 | if (STRINGP (tmp)) | |
1220 | { | |
1221 | display = tmp; | |
1222 | new_length++; | |
1223 | } | |
1224 | } | |
80856e74 | 1225 | |
7fcf7f05 RS |
1226 | /* new_length + 2 to include PWD and terminating 0. */ |
1227 | env = new_env = (char **) alloca ((new_length + 2) * sizeof (char *)); | |
7fcf7f05 RS |
1228 | /* If we have a PWD envvar, pass one down, |
1229 | but with corrected value. */ | |
a13f8f50 | 1230 | if (egetenv ("PWD")) |
7fcf7f05 | 1231 | *new_env++ = pwd_var; |
361358ea | 1232 | |
6b8e474c | 1233 | if (STRINGP (display)) |
de87fb59 | 1234 | { |
35016e9a | 1235 | char *vdata = (char *) alloca (sizeof "DISPLAY=" + SBYTES (display)); |
de87fb59 | 1236 | strcpy (vdata, "DISPLAY="); |
42a5b22f | 1237 | strcat (vdata, SSDATA (display)); |
de87fb59 DN |
1238 | new_env = add_env (env, new_env, vdata); |
1239 | } | |
80856e74 | 1240 | |
5990851d | 1241 | /* Overrides. */ |
80856e74 | 1242 | for (tem = Vprocess_environment; |
70949dac KR |
1243 | CONSP (tem) && STRINGP (XCAR (tem)); |
1244 | tem = XCDR (tem)) | |
42a5b22f | 1245 | new_env = add_env (env, new_env, SSDATA (XCAR (tem))); |
d2bb6598 | 1246 | |
5990851d KL |
1247 | *new_env = 0; |
1248 | ||
1249 | /* Remove variable names without values. */ | |
1250 | p = q = env; | |
1251 | while (*p != 0) | |
cd9565ba | 1252 | { |
19ed11ba AS |
1253 | while (*q != 0 && strchr (*q, '=') == NULL) |
1254 | q++; | |
1255 | *p = *q++; | |
1256 | if (*p != 0) | |
1257 | p++; | |
cd9565ba | 1258 | } |
80856e74 | 1259 | } |
de87fb59 | 1260 | |
361358ea | 1261 | |
bad95d8f RS |
1262 | #ifdef WINDOWSNT |
1263 | prepare_standard_handles (in, out, err, handles); | |
d5db4077 | 1264 | set_process_dir (SDATA (current_dir)); |
67802943 DN |
1265 | /* Spawn the child. (See ntproc.c:Spawnve). */ |
1266 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); | |
1267 | reset_standard_handles (in, out, err, handles); | |
1268 | if (cpid == -1) | |
1269 | /* An error occurred while trying to spawn the process. */ | |
1270 | report_file_error ("Spawning child process", Qnil); | |
1271 | return cpid; | |
1272 | ||
bad95d8f | 1273 | #else /* not WINDOWSNT */ |
426b37ae JB |
1274 | /* Make sure that in, out, and err are not actually already in |
1275 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1276 | started with its standard in, out, or error closed, as might |
426b37ae | 1277 | happen under X. */ |
f29f9e4a RS |
1278 | { |
1279 | int oin = in, oout = out; | |
1280 | ||
1281 | /* We have to avoid relocating the same descriptor twice! */ | |
1282 | ||
1283 | in = relocate_fd (in, 3); | |
1284 | ||
1285 | if (out == oin) | |
1286 | out = in; | |
1287 | else | |
3e9367e7 | 1288 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1289 | |
1290 | if (err == oin) | |
1291 | err = in; | |
1292 | else if (err == oout) | |
1293 | err = out; | |
1294 | else | |
3e9367e7 | 1295 | err = relocate_fd (err, 3); |
f29f9e4a | 1296 | } |
426b37ae | 1297 | |
c17c4250 | 1298 | #ifndef MSDOS |
68c45bf0 PE |
1299 | emacs_close (0); |
1300 | emacs_close (1); | |
1301 | emacs_close (2); | |
80856e74 JB |
1302 | |
1303 | dup2 (in, 0); | |
1304 | dup2 (out, 1); | |
1305 | dup2 (err, 2); | |
68c45bf0 | 1306 | emacs_close (in); |
ce8f5a9a AS |
1307 | if (out != in) |
1308 | emacs_close (out); | |
1309 | if (err != in && err != out) | |
1310 | emacs_close (err); | |
80856e74 | 1311 | |
58eb6cf0 | 1312 | #if defined(USG) |
fdba8590 | 1313 | #ifndef SETPGRP_RELEASES_CTTY |
e576cab4 | 1314 | setpgrp (); /* No arguments but equivalent in this case */ |
fdba8590 | 1315 | #endif |
67802943 | 1316 | #else /* not USG */ |
e576cab4 | 1317 | setpgrp (pid, pid); |
67802943 | 1318 | #endif /* not USG */ |
80856e74 | 1319 | |
a7ebc409 | 1320 | /* setpgrp_of_tty is incorrect here; it uses input_fd. */ |
12e610e8 | 1321 | tcsetpgrp (0, pid); |
a7ebc409 | 1322 | |
80856e74 JB |
1323 | /* execvp does not accept an environment arg so the only way |
1324 | to pass this environment is to set environ. Our caller | |
1325 | is responsible for restoring the ambient value of environ. */ | |
1326 | environ = env; | |
1327 | execvp (new_argv[0], new_argv); | |
1328 | ||
68c45bf0 PE |
1329 | emacs_write (1, "Can't exec program: ", 20); |
1330 | emacs_write (1, new_argv[0], strlen (new_argv[0])); | |
1331 | emacs_write (1, "\n", 1); | |
80856e74 | 1332 | _exit (1); |
67802943 DN |
1333 | |
1334 | #else /* MSDOS */ | |
1335 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
1336 | xfree (pwd_var); | |
1337 | if (pid == -1) | |
1338 | /* An error occurred while trying to run the subprocess. */ | |
1339 | report_file_error ("Spawning child process", Qnil); | |
1340 | return pid; | |
1341 | #endif /* MSDOS */ | |
ae76d9e1 | 1342 | #endif /* not WINDOWSNT */ |
80856e74 JB |
1343 | } |
1344 | ||
361358ea | 1345 | #ifndef WINDOWSNT |
a3833dfe | 1346 | /* Move the file descriptor FD so that its number is not less than MINFD. |
426b37ae | 1347 | If the file descriptor is moved at all, the original is freed. */ |
dfcf069d | 1348 | static int |
971de7fb | 1349 | relocate_fd (int fd, int minfd) |
426b37ae | 1350 | { |
a3833dfe | 1351 | if (fd >= minfd) |
426b37ae JB |
1352 | return fd; |
1353 | else | |
1354 | { | |
cf237e27 AS |
1355 | int new; |
1356 | #ifdef F_DUPFD | |
1357 | new = fcntl (fd, F_DUPFD, minfd); | |
1358 | #else | |
1359 | new = dup (fd); | |
1360 | if (new != -1) | |
1361 | /* Note that we hold the original FD open while we recurse, | |
1362 | to guarantee we'll get a new FD if we need it. */ | |
1363 | new = relocate_fd (new, minfd); | |
1364 | #endif | |
426b37ae JB |
1365 | if (new == -1) |
1366 | { | |
cb1d0ef7 | 1367 | const char *message_1 = "Error while setting up child: "; |
a8fe7202 | 1368 | const char *errmessage = strerror (errno); |
cb1d0ef7 PE |
1369 | const char *message_2 = "\n"; |
1370 | emacs_write (2, message_1, strlen (message_1)); | |
68c45bf0 | 1371 | emacs_write (2, errmessage, strlen (errmessage)); |
cb1d0ef7 | 1372 | emacs_write (2, message_2, strlen (message_2)); |
426b37ae JB |
1373 | _exit (1); |
1374 | } | |
68c45bf0 | 1375 | emacs_close (fd); |
426b37ae JB |
1376 | return new; |
1377 | } | |
1378 | } | |
361358ea | 1379 | #endif /* not WINDOWSNT */ |
426b37ae | 1380 | |
012c6fcb | 1381 | static int |
989f33ba PE |
1382 | getenv_internal_1 (const char *var, ptrdiff_t varlen, char **value, |
1383 | ptrdiff_t *valuelen, Lisp_Object env) | |
012c6fcb | 1384 | { |
db699fc6 | 1385 | for (; CONSP (env); env = XCDR (env)) |
012c6fcb | 1386 | { |
db699fc6 | 1387 | Lisp_Object entry = XCAR (env); |
d50d3dc8 | 1388 | if (STRINGP (entry) |
db699fc6 | 1389 | && SBYTES (entry) >= varlen |
bad95d8f RS |
1390 | #ifdef WINDOWSNT |
1391 | /* NT environment variables are case insensitive. */ | |
d5db4077 | 1392 | && ! strnicmp (SDATA (entry), var, varlen) |
bad95d8f | 1393 | #else /* not WINDOWSNT */ |
72af86bd | 1394 | && ! memcmp (SDATA (entry), var, varlen) |
bad95d8f | 1395 | #endif /* not WINDOWSNT */ |
a9971c6d | 1396 | ) |
012c6fcb | 1397 | { |
db699fc6 SM |
1398 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') |
1399 | { | |
51b59d79 | 1400 | *value = SSDATA (entry) + (varlen + 1); |
db699fc6 SM |
1401 | *valuelen = SBYTES (entry) - (varlen + 1); |
1402 | return 1; | |
1403 | } | |
1404 | else if (SBYTES (entry) == varlen) | |
1405 | { | |
1406 | /* Lone variable names in Vprocess_environment mean that | |
1407 | variable should be removed from the environment. */ | |
1408 | *value = NULL; | |
1409 | return 1; | |
1410 | } | |
1411 | } | |
1412 | } | |
1413 | return 0; | |
1414 | } | |
1415 | ||
012c6fcb | 1416 | static int |
989f33ba PE |
1417 | getenv_internal (const char *var, ptrdiff_t varlen, char **value, |
1418 | ptrdiff_t *valuelen, Lisp_Object frame) | |
012c6fcb | 1419 | { |
d2bb6598 SM |
1420 | /* Try to find VAR in Vprocess_environment first. */ |
1421 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1422 | Vprocess_environment)) | |
1423 | return *value ? 1 : 0; | |
f105f403 | 1424 | |
d2bb6598 | 1425 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
de87fb59 | 1426 | if (strcmp (var, "DISPLAY") == 0) |
d2bb6598 SM |
1427 | { |
1428 | Lisp_Object display | |
1429 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); | |
1430 | if (STRINGP (display)) | |
1431 | { | |
51b59d79 | 1432 | *value = SSDATA (display); |
de87fb59 | 1433 | *valuelen = SBYTES (display); |
012c6fcb JA |
1434 | return 1; |
1435 | } | |
d2bb6598 SM |
1436 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
1437 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1438 | Vinitial_environment)) | |
1439 | return *value ? 1 : 0; | |
012c6fcb JA |
1440 | } |
1441 | ||
1442 | return 0; | |
1443 | } | |
1444 | ||
f105f403 | 1445 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
5990851d KL |
1446 | doc: /* Get the value of environment variable VARIABLE. |
1447 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
1448 | the environment. Otherwise, value is a string. | |
f105f403 | 1449 | |
acf20901 | 1450 | This function searches `process-environment' for VARIABLE. |
5990851d | 1451 | |
db699fc6 | 1452 | If optional parameter ENV is a list, then search this list instead of |
acf20901 JB |
1453 | `process-environment', and return t when encountering a negative entry |
1454 | \(an entry for a variable with no value). */) | |
5842a27b | 1455 | (Lisp_Object variable, Lisp_Object env) |
012c6fcb JA |
1456 | { |
1457 | char *value; | |
989f33ba | 1458 | ptrdiff_t valuelen; |
012c6fcb | 1459 | |
5990851d | 1460 | CHECK_STRING (variable); |
db699fc6 SM |
1461 | if (CONSP (env)) |
1462 | { | |
42a5b22f | 1463 | if (getenv_internal_1 (SSDATA (variable), SBYTES (variable), |
db699fc6 SM |
1464 | &value, &valuelen, env)) |
1465 | return value ? make_string (value, valuelen) : Qt; | |
1466 | else | |
1467 | return Qnil; | |
1468 | } | |
42a5b22f | 1469 | else if (getenv_internal (SSDATA (variable), SBYTES (variable), |
d2bb6598 | 1470 | &value, &valuelen, env)) |
012c6fcb JA |
1471 | return make_string (value, valuelen); |
1472 | else | |
1473 | return Qnil; | |
1474 | } | |
1475 | ||
5990851d KL |
1476 | /* A version of getenv that consults the Lisp environment lists, |
1477 | easily callable from C. */ | |
012c6fcb | 1478 | char * |
a8fe7202 | 1479 | egetenv (const char *var) |
012c6fcb JA |
1480 | { |
1481 | char *value; | |
25c7e41f | 1482 | ptrdiff_t valuelen; |
012c6fcb | 1483 | |
f105f403 | 1484 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
012c6fcb JA |
1485 | return value; |
1486 | else | |
1487 | return 0; | |
1488 | } | |
1489 | ||
80856e74 | 1490 | \f |
8de15d69 | 1491 | /* This is run before init_cmdargs. */ |
177c0ea7 | 1492 | |
dfcf069d | 1493 | void |
971de7fb | 1494 | init_callproc_1 (void) |
8de15d69 RS |
1495 | { |
1496 | char *data_dir = egetenv ("EMACSDATA"); | |
35a2f4b8 KH |
1497 | char *doc_dir = egetenv ("EMACSDOC"); |
1498 | ||
8de15d69 | 1499 | Vdata_directory |
177c0ea7 | 1500 | = Ffile_name_as_directory (build_string (data_dir ? data_dir |
8de15d69 | 1501 | : PATH_DATA)); |
35a2f4b8 KH |
1502 | Vdoc_directory |
1503 | = Ffile_name_as_directory (build_string (doc_dir ? doc_dir | |
1504 | : PATH_DOC)); | |
9453ea7b | 1505 | |
e576cab4 | 1506 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1507 | PATH_EXEC path from epaths.h. */ |
e576cab4 | 1508 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); |
80856e74 JB |
1509 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
1510 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
8de15d69 RS |
1511 | } |
1512 | ||
e17f7533 | 1513 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1514 | |
dfcf069d | 1515 | void |
971de7fb | 1516 | init_callproc (void) |
8de15d69 RS |
1517 | { |
1518 | char *data_dir = egetenv ("EMACSDATA"); | |
177c0ea7 | 1519 | |
8de15d69 RS |
1520 | register char * sh; |
1521 | Lisp_Object tempdir; | |
1522 | ||
9cc4fad5 | 1523 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1524 | { |
05630743 RS |
1525 | /* Add to the path the lib-src subdir of the installation dir. */ |
1526 | Lisp_Object tem; | |
1527 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1528 | Vinstallation_directory); | |
bad95d8f | 1529 | #ifndef DOS_NT |
1a6640ec | 1530 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc | 1531 | if (NILP (Fmember (tem, Vexec_path))) |
70ec1377 RS |
1532 | { |
1533 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); | |
1534 | Vexec_path = Fcons (tem, Vexec_path); | |
1535 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
1536 | } | |
177c0ea7 | 1537 | |
0fa248bc | 1538 | Vexec_directory = Ffile_name_as_directory (tem); |
bad95d8f | 1539 | #endif /* not DOS_NT */ |
8de15d69 | 1540 | |
e17f7533 RS |
1541 | /* Maybe use ../etc as well as ../lib-src. */ |
1542 | if (data_dir == 0) | |
1543 | { | |
1544 | tem = Fexpand_file_name (build_string ("etc"), | |
1545 | Vinstallation_directory); | |
1546 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1547 | } |
1548 | } | |
7e933683 RS |
1549 | |
1550 | /* Look for the files that should be in etc. We don't use | |
1551 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1552 | near the executable, and they are never in the build |
7e933683 RS |
1553 | directory when that's different from the source directory. |
1554 | ||
1555 | Instead, if these files are not in the nominal place, we try the | |
1556 | source directory. */ | |
1557 | if (data_dir == 0) | |
1558 | { | |
70ec1377 | 1559 | Lisp_Object tem, tem1, srcdir; |
7e933683 | 1560 | |
70ec1377 RS |
1561 | srcdir = Fexpand_file_name (build_string ("../src/"), |
1562 | build_string (PATH_DUMPLOADSEARCH)); | |
7e933683 RS |
1563 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); |
1564 | tem1 = Ffile_exists_p (tem); | |
70ec1377 | 1565 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
7e933683 | 1566 | { |
70ec1377 | 1567 | Lisp_Object newdir; |
7e933683 RS |
1568 | newdir = Fexpand_file_name (build_string ("../etc/"), |
1569 | build_string (PATH_DUMPLOADSEARCH)); | |
1570 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1571 | tem1 = Ffile_exists_p (tem); | |
1572 | if (!NILP (tem1)) | |
1573 | Vdata_directory = newdir; | |
1574 | } | |
1575 | } | |
80856e74 | 1576 | |
d883eb62 RS |
1577 | #ifndef CANNOT_DUMP |
1578 | if (initialized) | |
1579 | #endif | |
1580 | { | |
1581 | tempdir = Fdirectory_file_name (Vexec_directory); | |
42a5b22f | 1582 | if (access (SSDATA (tempdir), 0) < 0) |
d883eb62 RS |
1583 | dir_warning ("Warning: arch-dependent data dir (%s) does not exist.\n", |
1584 | Vexec_directory); | |
1585 | } | |
80856e74 | 1586 | |
e576cab4 | 1587 | tempdir = Fdirectory_file_name (Vdata_directory); |
42a5b22f | 1588 | if (access (SSDATA (tempdir), 0) < 0) |
76d5c6cf RS |
1589 | dir_warning ("Warning: arch-independent data dir (%s) does not exist.\n", |
1590 | Vdata_directory); | |
e576cab4 | 1591 | |
e576cab4 | 1592 | sh = (char *) getenv ("SHELL"); |
80856e74 | 1593 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
8abd035b | 1594 | |
40b49d4b JB |
1595 | #ifdef DOS_NT |
1596 | Vshared_game_score_directory = Qnil; | |
1597 | #else | |
63789758 RS |
1598 | Vshared_game_score_directory = build_string (PATH_GAME); |
1599 | if (NILP (Ffile_directory_p (Vshared_game_score_directory))) | |
1600 | Vshared_game_score_directory = Qnil; | |
40b49d4b | 1601 | #endif |
9fefd2ba JB |
1602 | } |
1603 | ||
dfcf069d | 1604 | void |
971de7fb | 1605 | set_initial_environment (void) |
9fefd2ba | 1606 | { |
738db178 DN |
1607 | char **envp; |
1608 | for (envp = environ; *envp; envp++) | |
1609 | Vprocess_environment = Fcons (build_string (*envp), | |
1610 | Vprocess_environment); | |
1611 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent | |
1612 | to use `delete' and friends on process-environment. */ | |
1613 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); | |
80856e74 JB |
1614 | } |
1615 | ||
dfcf069d | 1616 | void |
971de7fb | 1617 | syms_of_callproc (void) |
80856e74 | 1618 | { |
f92d51d8 CY |
1619 | #ifndef DOS_NT |
1620 | Vtemp_file_name_pattern = build_string ("emacsXXXXXX"); | |
1621 | #elif defined (WINDOWSNT) | |
1622 | Vtemp_file_name_pattern = build_string ("emXXXXXX"); | |
1623 | #else | |
1624 | Vtemp_file_name_pattern = build_string ("detmp.XXX"); | |
1625 | #endif | |
1626 | staticpro (&Vtemp_file_name_pattern); | |
1627 | ||
29208e82 | 1628 | DEFVAR_LISP ("shell-file-name", Vshell_file_name, |
fdb82f93 | 1629 | doc: /* *File name to load inferior shells from. |
b20b29be EZ |
1630 | Initialized from the SHELL environment variable, or to a system-dependent |
1631 | default if SHELL is not set. */); | |
80856e74 | 1632 | |
29208e82 | 1633 | DEFVAR_LISP ("exec-path", Vexec_path, |
fdb82f93 PJ |
1634 | doc: /* *List of directories to search programs to run in subprocesses. |
1635 | Each element is a string (directory name) or nil (try default directory). */); | |
80856e74 | 1636 | |
29208e82 | 1637 | DEFVAR_LISP ("exec-suffixes", Vexec_suffixes, |
fdb82f93 PJ |
1638 | doc: /* *List of suffixes to try to find executable file names. |
1639 | Each element is a string. */); | |
33d5af99 | 1640 | Vexec_suffixes = Qnil; |
b81a1b72 | 1641 | |
29208e82 | 1642 | DEFVAR_LISP ("exec-directory", Vexec_directory, |
fdb82f93 PJ |
1643 | doc: /* Directory for executables for Emacs to invoke. |
1644 | More generally, this includes any architecture-dependent files | |
1645 | that are built and installed from the Emacs distribution. */); | |
e576cab4 | 1646 | |
29208e82 | 1647 | DEFVAR_LISP ("data-directory", Vdata_directory, |
fdb82f93 PJ |
1648 | doc: /* Directory of machine-independent files that come with GNU Emacs. |
1649 | These are files intended for Emacs to use while it runs. */); | |
80856e74 | 1650 | |
29208e82 | 1651 | DEFVAR_LISP ("doc-directory", Vdoc_directory, |
fdb82f93 | 1652 | doc: /* Directory containing the DOC file that comes with GNU Emacs. |
ebf24b59 | 1653 | This is usually the same as `data-directory'. */); |
35a2f4b8 | 1654 | |
29208e82 | 1655 | DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory, |
fdb82f93 PJ |
1656 | doc: /* For internal use by the build procedure only. |
1657 | This is the name of the directory in which the build procedure installed | |
ebf24b59 | 1658 | Emacs's info files; the default value for `Info-default-directory-list' |
fdb82f93 | 1659 | includes this. */); |
ed61592a JB |
1660 | Vconfigure_info_directory = build_string (PATH_INFO); |
1661 | ||
29208e82 | 1662 | DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory, |
b065672a CW |
1663 | doc: /* Directory of score files for games which come with GNU Emacs. |
1664 | If this variable is nil, then Emacs is unable to use a shared directory. */); | |
40b49d4b JB |
1665 | #ifdef DOS_NT |
1666 | Vshared_game_score_directory = Qnil; | |
1667 | #else | |
63789758 | 1668 | Vshared_game_score_directory = build_string (PATH_GAME); |
40b49d4b | 1669 | #endif |
b065672a | 1670 | |
29208e82 | 1671 | DEFVAR_LISP ("initial-environment", Vinitial_environment, |
6b8e474c SM |
1672 | doc: /* List of environment variables inherited from the parent process. |
1673 | Each element should be a string of the form ENVVARNAME=VALUE. | |
1674 | The elements must normally be decoded (using `locale-coding-system') for use. */); | |
1675 | Vinitial_environment = Qnil; | |
1676 | ||
29208e82 | 1677 | DEFVAR_LISP ("process-environment", Vprocess_environment, |
5990851d | 1678 | doc: /* List of overridden environment variables for subprocesses to inherit. |
fdb82f93 | 1679 | Each element should be a string of the form ENVVARNAME=VALUE. |
5990851d | 1680 | |
a13f8f50 KL |
1681 | Entries in this list take precedence to those in the frame-local |
1682 | environments. Therefore, let-binding `process-environment' is an easy | |
1683 | way to temporarily change the value of an environment variable, | |
1684 | irrespective of where it comes from. To use `process-environment' to | |
1685 | remove an environment variable, include only its name in the list, | |
1686 | without "=VALUE". | |
5990851d KL |
1687 | |
1688 | This variable is set to nil when Emacs starts. | |
1689 | ||
fdb82f93 PJ |
1690 | If multiple entries define the same variable, the first one always |
1691 | takes precedence. | |
5990851d | 1692 | |
776a24a1 | 1693 | Non-ASCII characters are encoded according to the initial value of |
5990851d KL |
1694 | `locale-coding-system', i.e. the elements must normally be decoded for |
1695 | use. | |
1696 | ||
776a24a1 | 1697 | See `setenv' and `getenv'. */); |
86f5ca04 | 1698 | Vprocess_environment = Qnil; |
80856e74 | 1699 | |
80856e74 | 1700 | defsubr (&Scall_process); |
83fa009c | 1701 | defsubr (&Sgetenv_internal); |
e576cab4 | 1702 | defsubr (&Scall_process_region); |
80856e74 | 1703 | } |