Commit | Line | Data |
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80856e74 | 1 | /* Synchronous subprocess invocation for GNU Emacs. |
acaf905b | 2 | Copyright (C) 1985-1988, 1993-1995, 1999-2012 |
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> |
e576cab4 | 22 | #include <errno.h> |
565620a5 | 23 | #include <stdio.h> |
80856e74 | 24 | #include <sys/types.h> |
3cbd6585 | 25 | #include <unistd.h> |
3cbd6585 | 26 | |
80856e74 | 27 | #include <sys/file.h> |
80856e74 | 28 | #include <fcntl.h> |
80856e74 | 29 | |
0898ca10 JB |
30 | #include "lisp.h" |
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 | 44 | #include "commands.h" |
91183bfd | 45 | #include "character.h" |
e5560ff7 | 46 | #include "buffer.h" |
edf496dd | 47 | #include "ccl.h" |
32d08644 | 48 | #include "coding.h" |
f0b950cf | 49 | #include "composite.h" |
57bda87a | 50 | #include <epaths.h> |
80856e74 | 51 | #include "process.h" |
d177f194 | 52 | #include "syssignal.h" |
a129418f | 53 | #include "systty.h" |
afea8a8a | 54 | #include "syswait.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 | ||
d01ba2f1 GM |
63 | #ifdef HAVE_NS |
64 | #include "nsterm.h" | |
65 | #endif | |
66 | ||
f92d51d8 CY |
67 | /* Pattern used by call-process-region to make temp files. */ |
68 | static Lisp_Object Vtemp_file_name_pattern; | |
69 | ||
bb5f74ee PE |
70 | /* The next two variables are valid only while record-unwind-protect |
71 | is in place during call-process for a synchronous subprocess. At | |
72 | other times, their contents are irrelevant. Doing this via static | |
73 | C variables is more convenient than putting them into the arguments | |
74 | of record-unwind-protect, as they need to be updated at randomish | |
75 | times in the code, and Lisp cannot always store these values as | |
76 | Emacs integers. It's safe to use static variables here, as the | |
77 | code is never invoked reentrantly. */ | |
78 | ||
79 | /* If nonzero, a process-ID that has not been reaped. */ | |
80 | static pid_t synch_process_pid; | |
81 | ||
82 | /* If nonnegative, a file descriptor that has not been closed. */ | |
83 | static int synch_process_fd; | |
84 | \f | |
85 | /* Block SIGCHLD. */ | |
80856e74 | 86 | |
bb5f74ee PE |
87 | static void |
88 | block_child_signal (void) | |
89 | { | |
bb5f74ee PE |
90 | sigset_t blocked; |
91 | sigemptyset (&blocked); | |
92 | sigaddset (&blocked, SIGCHLD); | |
93 | pthread_sigmask (SIG_BLOCK, &blocked, 0); | |
bb5f74ee | 94 | } |
6b61353c | 95 | |
bb5f74ee | 96 | /* Unblock SIGCHLD. */ |
f105f403 | 97 | |
bb5f74ee PE |
98 | static void |
99 | unblock_child_signal (void) | |
100 | { | |
bb5f74ee | 101 | pthread_sigmask (SIG_SETMASK, &empty_mask, 0); |
bb5f74ee | 102 | } |
37d54121 | 103 | |
35fb8050 PE |
104 | /* If P is reapable, record it as a deleted process and kill it. |
105 | Do this in a critical section. Unless PID is wedged it will be | |
106 | reaped on receipt of the first SIGCHLD after the critical section. */ | |
107 | ||
108 | void | |
109 | record_kill_process (struct Lisp_Process *p) | |
110 | { | |
111 | block_child_signal (); | |
112 | ||
113 | if (p->alive) | |
114 | { | |
115 | p->alive = 0; | |
116 | record_deleted_pid (p->pid); | |
d983a10b | 117 | kill (- p->pid, SIGKILL); |
35fb8050 PE |
118 | } |
119 | ||
120 | unblock_child_signal (); | |
121 | } | |
122 | ||
bb5f74ee | 123 | /* Clean up when exiting call_process_cleanup. */ |
37d54121 | 124 | |
d177f194 | 125 | static Lisp_Object |
bb5f74ee | 126 | call_process_kill (Lisp_Object ignored) |
d177f194 | 127 | { |
bb5f74ee PE |
128 | if (0 <= synch_process_fd) |
129 | emacs_close (synch_process_fd); | |
130 | ||
bb5f74ee PE |
131 | if (synch_process_pid) |
132 | { | |
35fb8050 PE |
133 | struct Lisp_Process proc; |
134 | proc.alive = 1; | |
135 | proc.pid = synch_process_pid; | |
136 | record_kill_process (&proc); | |
bb5f74ee PE |
137 | } |
138 | ||
d177f194 JB |
139 | return Qnil; |
140 | } | |
141 | ||
bb5f74ee PE |
142 | /* Clean up when exiting Fcall_process. |
143 | On MSDOS, delete the temporary file on any kind of termination. | |
144 | On Unix, kill the process and any children on termination by signal. */ | |
145 | ||
7710357c | 146 | static Lisp_Object |
971de7fb | 147 | call_process_cleanup (Lisp_Object arg) |
80856e74 | 148 | { |
bb5f74ee PE |
149 | #ifdef MSDOS |
150 | Lisp_Object buffer = Fcar (arg); | |
151 | Lisp_Object file = Fcdr (arg); | |
ad3aaf33 | 152 | #else |
bb5f74ee | 153 | Lisp_Object buffer = arg; |
ad3aaf33 AS |
154 | #endif |
155 | ||
bb5f74ee | 156 | Fset_buffer (buffer); |
d177f194 | 157 | |
bb5f74ee PE |
158 | #ifndef MSDOS |
159 | /* If the process still exists, kill its process group. */ | |
160 | if (synch_process_pid) | |
d177f194 | 161 | { |
d311d28c | 162 | ptrdiff_t count = SPECPDL_INDEX (); |
d983a10b | 163 | kill (-synch_process_pid, SIGINT); |
bb5f74ee | 164 | record_unwind_protect (call_process_kill, make_number (0)); |
d177f194 JB |
165 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); |
166 | immediate_quit = 1; | |
167 | QUIT; | |
bb5f74ee PE |
168 | wait_for_termination (synch_process_pid, 0, 1); |
169 | synch_process_pid = 0; | |
d177f194 JB |
170 | immediate_quit = 0; |
171 | specpdl_ptr = specpdl + count; /* Discard the unwind protect. */ | |
172 | message1 ("Waiting for process to die...done"); | |
173 | } | |
bb5f74ee PE |
174 | #endif |
175 | ||
176 | if (0 <= synch_process_fd) | |
177 | emacs_close (synch_process_fd); | |
178 | ||
179 | #ifdef MSDOS | |
180 | /* FILE is "" when we didn't actually create a temporary file in | |
181 | call-process. */ | |
182 | if (!(strcmp (SDATA (file), NULL_DEVICE) == 0 || SREF (file, 0) == '\0')) | |
183 | unlink (SDATA (file)); | |
184 | #endif | |
185 | ||
80856e74 JB |
186 | return Qnil; |
187 | } | |
188 | ||
a7ca3326 | 189 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, |
fdb82f93 PJ |
190 | doc: /* Call PROGRAM synchronously in separate process. |
191 | The remaining arguments are optional. | |
192 | The program's input comes from file INFILE (nil means `/dev/null'). | |
1ef14cb4 LMI |
193 | Insert output in BUFFER before point; t means current buffer; nil for BUFFER |
194 | means discard it; 0 means discard and don't wait; and `(:file FILE)', where | |
1b9f60cc GM |
195 | FILE is a file name string, means that it should be written to that file |
196 | \(if the file already exists it is overwritten). | |
fdb82f93 PJ |
197 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
198 | REAL-BUFFER says what to do with standard output, as above, | |
199 | while STDERR-FILE says what to do with standard error in the child. | |
200 | STDERR-FILE may be nil (discard standard error output), | |
201 | t (mix it with ordinary output), or a file name string. | |
202 | ||
203 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
204 | Remaining arguments are strings passed as command arguments to PROGRAM. | |
205 | ||
a4feb144 RS |
206 | If executable PROGRAM can't be found as an executable, `call-process' |
207 | signals a Lisp error. `call-process' reports errors in execution of | |
208 | the program only through its return and output. | |
209 | ||
fdb82f93 PJ |
210 | If BUFFER is 0, `call-process' returns immediately with value nil. |
211 | Otherwise it waits for PROGRAM to terminate | |
212 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
213 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
214 | ||
215 | usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */) | |
f66c7cf8 | 216 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 217 | { |
bb5f74ee | 218 | Lisp_Object infile, buffer, current_dir, path; |
2f221583 | 219 | bool display_p; |
60aeceb8 | 220 | int fd0, fd1, filefd; |
bb5f74ee | 221 | int status; |
d311d28c PE |
222 | ptrdiff_t count = SPECPDL_INDEX (); |
223 | USE_SAFE_ALLOCA; | |
2d607244 | 224 | |
60aeceb8 | 225 | char **new_argv; |
39eaa782 RS |
226 | /* File to use for stderr in the child. |
227 | t means use same as standard output. */ | |
228 | Lisp_Object error_file; | |
1ef14cb4 | 229 | Lisp_Object output_file = Qnil; |
7e6c2178 | 230 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
888c9e86 | 231 | char *outf, *tempfile = NULL; |
7e6c2178 | 232 | int outfilefd; |
d311d28c PE |
233 | int pid; |
234 | #else | |
235 | pid_t pid; | |
80856e74 | 236 | #endif |
bb5f74ee | 237 | int child_errno; |
1ef14cb4 | 238 | int fd_output = -1; |
32d08644 KH |
239 | struct coding_system process_coding; /* coding-system of process output */ |
240 | struct coding_system argument_coding; /* coding-system of arguments */ | |
09494912 RS |
241 | /* Set to the return value of Ffind_operation_coding_system. */ |
242 | Lisp_Object coding_systems; | |
2f221583 | 243 | bool output_to_buffer = 1; |
09494912 RS |
244 | |
245 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ | |
246 | coding_systems = Qt; | |
32d08644 | 247 | |
b7826503 | 248 | CHECK_STRING (args[0]); |
80856e74 | 249 | |
39eaa782 RS |
250 | error_file = Qt; |
251 | ||
7e6c2178 RS |
252 | #ifndef subprocesses |
253 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
177c0ea7 | 254 | if (nargs >= 3 |
09ffb8b5 | 255 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
256 | error ("Operating system cannot handle asynchronous subprocesses"); |
257 | #endif /* subprocesses */ | |
258 | ||
09494912 | 259 | /* Decide the coding-system for giving arguments. */ |
32d08644 KH |
260 | { |
261 | Lisp_Object val, *args2; | |
f66c7cf8 | 262 | ptrdiff_t i; |
32d08644 KH |
263 | |
264 | /* If arguments are supplied, we may have to encode them. */ | |
265 | if (nargs >= 5) | |
266 | { | |
2f221583 | 267 | bool must_encode = 0; |
6e50da0a | 268 | Lisp_Object coding_attrs; |
30d57b8e | 269 | |
e7c1c20e | 270 | for (i = 4; i < nargs; i++) |
b7826503 | 271 | CHECK_STRING (args[i]); |
e7c1c20e | 272 | |
a2286b5c | 273 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
274 | if (STRING_MULTIBYTE (args[i])) |
275 | must_encode = 1; | |
276 | ||
beacaab3 KH |
277 | if (!NILP (Vcoding_system_for_write)) |
278 | val = Vcoding_system_for_write; | |
30d57b8e | 279 | else if (! must_encode) |
fcaf8878 | 280 | val = Qraw_text; |
beacaab3 | 281 | else |
32d08644 | 282 | { |
0065d054 | 283 | SAFE_NALLOCA (args2, 1, nargs + 1); |
32d08644 KH |
284 | args2[0] = Qcall_process; |
285 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 286 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 287 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
32d08644 | 288 | } |
fcaf8878 | 289 | val = complement_process_encoding_system (val); |
32d08644 | 290 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); |
6e50da0a KH |
291 | coding_attrs = CODING_ID_ATTRS (argument_coding.id); |
292 | if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs))) | |
293 | { | |
294 | /* We should not use an ASCII incompatible coding system. */ | |
295 | val = raw_text_coding_system (val); | |
296 | setup_coding_system (val, &argument_coding); | |
297 | } | |
32d08644 | 298 | } |
32d08644 KH |
299 | } |
300 | ||
e576cab4 JB |
301 | if (nargs >= 2 && ! NILP (args[1])) |
302 | { | |
4b4deea2 | 303 | infile = Fexpand_file_name (args[1], BVAR (current_buffer, directory)); |
b7826503 | 304 | CHECK_STRING (infile); |
e576cab4 | 305 | } |
80856e74 | 306 | else |
5437e9f9 | 307 | infile = build_string (NULL_DEVICE); |
80856e74 | 308 | |
e576cab4 JB |
309 | if (nargs >= 3) |
310 | { | |
39eaa782 RS |
311 | buffer = args[2]; |
312 | ||
1ef14cb4 LMI |
313 | /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT |
314 | FILE-FOR-STDERR), unless the first element is :file, in which case see | |
315 | the next paragraph. */ | |
19ed11ba AS |
316 | if (CONSP (buffer) |
317 | && (! SYMBOLP (XCAR (buffer)) | |
318 | || strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file"))) | |
39eaa782 | 319 | { |
70949dac | 320 | if (CONSP (XCDR (buffer))) |
45be8a1e | 321 | { |
a9d4f28a | 322 | Lisp_Object stderr_file; |
70949dac | 323 | stderr_file = XCAR (XCDR (buffer)); |
45be8a1e RS |
324 | |
325 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
326 | error_file = stderr_file; | |
327 | else | |
328 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
329 | } | |
330 | ||
70949dac | 331 | buffer = XCAR (buffer); |
39eaa782 | 332 | } |
044512ed | 333 | |
1ef14cb4 | 334 | /* If the buffer is (still) a list, it might be a (:file "file") spec. */ |
19ed11ba AS |
335 | if (CONSP (buffer) |
336 | && SYMBOLP (XCAR (buffer)) | |
337 | && ! strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file")) | |
1ef14cb4 LMI |
338 | { |
339 | output_file = Fexpand_file_name (XCAR (XCDR (buffer)), | |
340 | BVAR (current_buffer, directory)); | |
341 | CHECK_STRING (output_file); | |
342 | buffer = Qnil; | |
343 | } | |
344 | ||
39eaa782 RS |
345 | if (!(EQ (buffer, Qnil) |
346 | || EQ (buffer, Qt) | |
3ffde7d6 | 347 | || INTEGERP (buffer))) |
e576cab4 | 348 | { |
39eaa782 RS |
349 | Lisp_Object spec_buffer; |
350 | spec_buffer = buffer; | |
50fe359b | 351 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
352 | /* Mention the buffer name for a better error message. */ |
353 | if (NILP (buffer)) | |
b7826503 PJ |
354 | CHECK_BUFFER (spec_buffer); |
355 | CHECK_BUFFER (buffer); | |
e576cab4 JB |
356 | } |
357 | } | |
177c0ea7 | 358 | else |
e576cab4 | 359 | buffer = Qnil; |
80856e74 | 360 | |
58616e67 JB |
361 | /* Make sure that the child will be able to chdir to the current |
362 | buffer's current directory, or its unhandled equivalent. We | |
363 | can't just have the child check for an error when it does the | |
364 | chdir, since it's in a vfork. | |
365 | ||
366 | We have to GCPRO around this because Fexpand_file_name, | |
367 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
368 | might call a file name handling function. The argument list is | |
369 | protected by the caller, so all we really have to worry about is | |
370 | buffer. */ | |
371 | { | |
1ef14cb4 | 372 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
58616e67 | 373 | |
4b4deea2 | 374 | current_dir = BVAR (current_buffer, directory); |
58616e67 | 375 | |
1ef14cb4 | 376 | GCPRO5 (infile, buffer, current_dir, error_file, output_file); |
58616e67 | 377 | |
ca319910 SM |
378 | current_dir = Funhandled_file_name_directory (current_dir); |
379 | if (NILP (current_dir)) | |
380 | /* If the file name handler says that current_dir is unreachable, use | |
381 | a sensible default. */ | |
382 | current_dir = build_string ("~/"); | |
383 | current_dir = expand_and_dir_to_file (current_dir, Qnil); | |
db8454b0 CY |
384 | current_dir = Ffile_name_as_directory (current_dir); |
385 | ||
58616e67 JB |
386 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
387 | report_file_error ("Setting current directory", | |
4b4deea2 | 388 | Fcons (BVAR (current_buffer, directory), Qnil)); |
58616e67 | 389 | |
34b87689 KH |
390 | if (STRING_MULTIBYTE (infile)) |
391 | infile = ENCODE_FILE (infile); | |
392 | if (STRING_MULTIBYTE (current_dir)) | |
393 | current_dir = ENCODE_FILE (current_dir); | |
394 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) | |
395 | error_file = ENCODE_FILE (error_file); | |
1ef14cb4 LMI |
396 | if (STRINGP (output_file) && STRING_MULTIBYTE (output_file)) |
397 | output_file = ENCODE_FILE (output_file); | |
58616e67 JB |
398 | UNGCPRO; |
399 | } | |
400 | ||
d311d28c | 401 | display_p = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
80856e74 | 402 | |
42a5b22f | 403 | filefd = emacs_open (SSDATA (infile), O_RDONLY, 0); |
80856e74 | 404 | if (filefd < 0) |
b0728617 EZ |
405 | report_file_error ("Opening process input file", |
406 | Fcons (DECODE_FILE (infile), Qnil)); | |
1ef14cb4 LMI |
407 | |
408 | if (STRINGP (output_file)) | |
409 | { | |
410 | #ifdef DOS_NT | |
411 | fd_output = emacs_open (SSDATA (output_file), | |
412 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, | |
413 | S_IREAD | S_IWRITE); | |
414 | #else /* not DOS_NT */ | |
415 | fd_output = creat (SSDATA (output_file), 0666); | |
416 | #endif /* not DOS_NT */ | |
417 | if (fd_output < 0) | |
418 | { | |
419 | output_file = DECODE_FILE (output_file); | |
420 | report_file_error ("Opening process output file", | |
421 | Fcons (output_file, Qnil)); | |
19ed11ba | 422 | } |
1ef14cb4 | 423 | if (STRINGP (error_file) || NILP (error_file)) |
19ed11ba | 424 | output_to_buffer = 0; |
1ef14cb4 LMI |
425 | } |
426 | ||
80856e74 | 427 | /* Search for program; barf if not found. */ |
c52b0b34 | 428 | { |
ad3aaf33 | 429 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
c52b0b34 | 430 | |
ad3aaf33 | 431 | GCPRO4 (infile, buffer, current_dir, error_file); |
5c150961 | 432 | openp (Vexec_path, args[0], Vexec_suffixes, &path, make_number (X_OK)); |
c52b0b34 KH |
433 | UNGCPRO; |
434 | } | |
012c6fcb | 435 | if (NILP (path)) |
80856e74 | 436 | { |
68c45bf0 | 437 | emacs_close (filefd); |
80856e74 JB |
438 | report_file_error ("Searching for program", Fcons (args[0], Qnil)); |
439 | } | |
8ee8f447 RS |
440 | |
441 | /* If program file name starts with /: for quoting a magic name, | |
442 | discard that. */ | |
443 | if (SBYTES (path) > 2 && SREF (path, 0) == '/' | |
444 | && SREF (path, 1) == ':') | |
445 | path = Fsubstring (path, make_number (2), Qnil); | |
446 | ||
98c6f1e3 | 447 | new_argv = SAFE_ALLOCA ((nargs > 4 ? nargs - 2 : 2) * sizeof *new_argv); |
c364e618 | 448 | |
e7c3fb06 EZ |
449 | { |
450 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; | |
451 | ||
452 | GCPRO5 (infile, buffer, current_dir, path, error_file); | |
453 | if (nargs > 4) | |
454 | { | |
455 | ptrdiff_t i; | |
456 | ||
457 | argument_coding.dst_multibyte = 0; | |
458 | for (i = 4; i < nargs; i++) | |
459 | { | |
460 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); | |
461 | if (CODING_REQUIRE_ENCODING (&argument_coding)) | |
462 | /* We must encode this argument. */ | |
463 | args[i] = encode_coding_string (&argument_coding, args[i], 1); | |
464 | } | |
465 | for (i = 4; i < nargs; i++) | |
94fbc901 | 466 | new_argv[i - 3] = SSDATA (args[i]); |
e7c3fb06 EZ |
467 | new_argv[i - 3] = 0; |
468 | } | |
469 | else | |
470 | new_argv[1] = 0; | |
471 | if (STRING_MULTIBYTE (path)) | |
472 | path = ENCODE_FILE (path); | |
94fbc901 | 473 | new_argv[0] = SSDATA (path); |
e7c3fb06 EZ |
474 | UNGCPRO; |
475 | } | |
80856e74 | 476 | |
7e6c2178 | 477 | #ifdef MSDOS /* MW, July 1993 */ |
7e6c2178 | 478 | |
888c9e86 EZ |
479 | /* If we're redirecting STDOUT to a file, that file is already open |
480 | on fd_output. */ | |
1ef14cb4 | 481 | if (fd_output < 0) |
7e6c2178 | 482 | { |
888c9e86 EZ |
483 | if ((outf = egetenv ("TMPDIR"))) |
484 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); | |
485 | else | |
486 | { | |
487 | tempfile = alloca (20); | |
488 | *tempfile = '\0'; | |
489 | } | |
490 | dostounix_filename (tempfile); | |
491 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') | |
492 | strcat (tempfile, "/"); | |
493 | strcat (tempfile, "detmp.XXX"); | |
494 | mktemp (tempfile); | |
1ef14cb4 LMI |
495 | outfilefd = creat (tempfile, S_IREAD | S_IWRITE); |
496 | if (outfilefd < 0) { | |
497 | emacs_close (filefd); | |
498 | report_file_error ("Opening process output file", | |
499 | Fcons (build_string (tempfile), Qnil)); | |
500 | } | |
7e6c2178 | 501 | } |
1ef14cb4 LMI |
502 | else |
503 | outfilefd = fd_output; | |
60aeceb8 PE |
504 | fd0 = filefd; |
505 | fd1 = outfilefd; | |
6f89d28a | 506 | #endif /* MSDOS */ |
7e6c2178 | 507 | |
d50d3dc8 | 508 | if (INTEGERP (buffer)) |
60aeceb8 PE |
509 | { |
510 | fd0 = -1; | |
511 | fd1 = emacs_open (NULL_DEVICE, O_WRONLY, 0); | |
512 | } | |
80856e74 JB |
513 | else |
514 | { | |
7e6c2178 | 515 | #ifndef MSDOS |
60aeceb8 | 516 | int fd[2]; |
db92b288 GM |
517 | if (pipe (fd) == -1) |
518 | { | |
60aeceb8 | 519 | int pipe_errno = errno; |
db92b288 | 520 | emacs_close (filefd); |
60aeceb8 | 521 | errno = pipe_errno; |
db92b288 GM |
522 | report_file_error ("Creating process pipe", Qnil); |
523 | } | |
60aeceb8 PE |
524 | fd0 = fd[0]; |
525 | fd1 = fd[1]; | |
80856e74 JB |
526 | #endif |
527 | } | |
528 | ||
529 | { | |
39eaa782 | 530 | int fd_error = fd1; |
80856e74 | 531 | |
1ef14cb4 LMI |
532 | if (fd_output >= 0) |
533 | fd1 = fd_output; | |
80856e74 | 534 | |
39eaa782 | 535 | if (NILP (error_file)) |
68c45bf0 | 536 | fd_error = emacs_open (NULL_DEVICE, O_WRONLY, 0); |
39eaa782 RS |
537 | else if (STRINGP (error_file)) |
538 | { | |
539 | #ifdef DOS_NT | |
42a5b22f | 540 | fd_error = emacs_open (SSDATA (error_file), |
68c45bf0 PE |
541 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, |
542 | S_IREAD | S_IWRITE); | |
39eaa782 | 543 | #else /* not DOS_NT */ |
42a5b22f | 544 | fd_error = creat (SSDATA (error_file), 0666); |
39eaa782 RS |
545 | #endif /* not DOS_NT */ |
546 | } | |
547 | ||
548 | if (fd_error < 0) | |
549 | { | |
68c45bf0 | 550 | emacs_close (filefd); |
60aeceb8 PE |
551 | if (fd0 != filefd) |
552 | emacs_close (fd0); | |
39eaa782 | 553 | if (fd1 >= 0) |
68c45bf0 | 554 | emacs_close (fd1); |
6f89d28a MB |
555 | #ifdef MSDOS |
556 | unlink (tempfile); | |
557 | #endif | |
34b87689 KH |
558 | if (NILP (error_file)) |
559 | error_file = build_string (NULL_DEVICE); | |
560 | else if (STRINGP (error_file)) | |
561 | error_file = DECODE_FILE (error_file); | |
562 | report_file_error ("Cannot redirect stderr", Fcons (error_file, Qnil)); | |
39eaa782 | 563 | } |
89e1ec1d | 564 | |
2610078a | 565 | #ifdef MSDOS /* MW, July 1993 */ |
c17c4250 | 566 | /* Note that on MSDOS `child_setup' actually returns the child process |
bb5f74ee | 567 | exit status, not its PID, so assign it to status below. */ |
60aeceb8 | 568 | pid = child_setup (filefd, outfilefd, fd_error, new_argv, 0, current_dir); |
bb5f74ee | 569 | child_errno = errno; |
2610078a | 570 | |
68c45bf0 | 571 | emacs_close (outfilefd); |
2610078a | 572 | if (fd_error != outfilefd) |
68c45bf0 | 573 | emacs_close (fd_error); |
bb5f74ee PE |
574 | if (pid < 0) |
575 | { | |
576 | synchronize_system_messages_locale (); | |
577 | return | |
578 | code_convert_string_norecord (build_string (strerror (child_errno)), | |
579 | Vlocale_coding_system, 0); | |
580 | } | |
581 | status = pid; | |
2610078a | 582 | fd1 = -1; /* No harm in closing that one! */ |
888c9e86 | 583 | if (tempfile) |
2610078a | 584 | { |
888c9e86 EZ |
585 | /* Since CRLF is converted to LF within `decode_coding', we |
586 | can always open a file with binary mode. */ | |
60aeceb8 PE |
587 | fd0 = emacs_open (tempfile, O_RDONLY | O_BINARY, 0); |
588 | if (fd0 < 0) | |
888c9e86 EZ |
589 | { |
590 | unlink (tempfile); | |
591 | emacs_close (filefd); | |
592 | report_file_error ("Cannot re-open temporary file", | |
7285dc67 | 593 | Fcons (build_string (tempfile), Qnil)); |
888c9e86 | 594 | } |
2610078a | 595 | } |
888c9e86 | 596 | else |
60aeceb8 | 597 | fd0 = -1; /* We are not going to read from tempfile. */ |
644d3f0d | 598 | #endif /* MSDOS */ |
bb5f74ee PE |
599 | |
600 | /* Do the unwind-protect now, even though the pid is not known, so | |
601 | that no storage allocation is done in the critical section. | |
602 | The actual PID will be filled in during the critical section. */ | |
603 | synch_process_pid = 0; | |
604 | synch_process_fd = fd0; | |
644d3f0d PE |
605 | |
606 | #ifdef MSDOS | |
607 | /* MSDOS needs different cleanup information. */ | |
608 | record_unwind_protect (call_process_cleanup, | |
609 | Fcons (Fcurrent_buffer (), | |
610 | build_string (tempfile ? tempfile : ""))); | |
611 | #else | |
bb5f74ee PE |
612 | record_unwind_protect (call_process_cleanup, Fcurrent_buffer ()); |
613 | ||
614 | block_input (); | |
615 | block_child_signal (); | |
616 | ||
bad95d8f | 617 | #ifdef WINDOWSNT |
60aeceb8 | 618 | pid = child_setup (filefd, fd1, fd_error, new_argv, 0, current_dir); |
b0728617 EZ |
619 | /* We need to record the input file of this child, for when we are |
620 | called from call-process-region to create an async subprocess. | |
621 | That's because call-process-region's unwind procedure will | |
622 | attempt to delete the temporary input file, which will fail | |
623 | because that file is still in use. Recording it with the child | |
624 | will allow us to delete the file when the subprocess exits. | |
625 | The second part of this is in delete_temp_file, q.v. */ | |
626 | if (pid > 0 && INTEGERP (buffer) && nargs >= 2 && !NILP (args[1])) | |
627 | record_infile (pid, xstrdup (SSDATA (infile))); | |
bad95d8f | 628 | #else /* not WINDOWSNT */ |
c0ad4ea5 | 629 | |
db6c0e74 | 630 | /* vfork, and prevent local vars from being clobbered by the vfork. */ |
b08a63cc | 631 | { |
c74e9d86 PE |
632 | Lisp_Object volatile buffer_volatile = buffer; |
633 | Lisp_Object volatile coding_systems_volatile = coding_systems; | |
634 | Lisp_Object volatile current_dir_volatile = current_dir; | |
2f221583 PE |
635 | bool volatile display_p_volatile = display_p; |
636 | bool volatile output_to_buffer_volatile = output_to_buffer; | |
637 | bool volatile sa_must_free_volatile = sa_must_free; | |
5266b4bb | 638 | int volatile fd1_volatile = fd1; |
db6c0e74 PE |
639 | int volatile fd_error_volatile = fd_error; |
640 | int volatile fd_output_volatile = fd_output; | |
60aeceb8 PE |
641 | int volatile filefd_volatile = filefd; |
642 | ptrdiff_t volatile count_volatile = count; | |
d311d28c | 643 | ptrdiff_t volatile sa_count_volatile = sa_count; |
60aeceb8 | 644 | char **volatile new_argv_volatile = new_argv; |
80856e74 | 645 | |
db6c0e74 | 646 | pid = vfork (); |
bb5f74ee | 647 | child_errno = errno; |
80856e74 | 648 | |
c74e9d86 PE |
649 | buffer = buffer_volatile; |
650 | coding_systems = coding_systems_volatile; | |
651 | current_dir = current_dir_volatile; | |
d311d28c | 652 | display_p = display_p_volatile; |
60aeceb8 PE |
653 | output_to_buffer = output_to_buffer_volatile; |
654 | sa_must_free = sa_must_free_volatile; | |
5266b4bb | 655 | fd1 = fd1_volatile; |
db6c0e74 PE |
656 | fd_error = fd_error_volatile; |
657 | fd_output = fd_output_volatile; | |
60aeceb8 PE |
658 | filefd = filefd_volatile; |
659 | count = count_volatile; | |
d311d28c | 660 | sa_count = sa_count_volatile; |
db6c0e74 | 661 | new_argv = new_argv_volatile; |
644d3f0d PE |
662 | |
663 | fd0 = synch_process_fd; | |
db6c0e74 | 664 | } |
b9c7f648 | 665 | |
80856e74 JB |
666 | if (pid == 0) |
667 | { | |
bb5f74ee PE |
668 | unblock_child_signal (); |
669 | ||
60aeceb8 PE |
670 | if (fd0 >= 0) |
671 | emacs_close (fd0); | |
322aea6d | 672 | |
19ed11ba | 673 | setsid (); |
c0ad4ea5 | 674 | |
4d7e6e51 | 675 | /* Emacs ignores SIGPIPE, but the child should not. */ |
2f9b9adb | 676 | signal (SIGPIPE, SIG_DFL); |
c0ad4ea5 | 677 | |
60aeceb8 | 678 | child_setup (filefd, fd1, fd_error, new_argv, 0, current_dir); |
80856e74 | 679 | } |
aba637ec | 680 | |
bad95d8f | 681 | #endif /* not WINDOWSNT */ |
cd5f8f60 | 682 | |
bb5f74ee PE |
683 | child_errno = errno; |
684 | ||
685 | if (0 < pid) | |
686 | { | |
687 | if (INTEGERP (buffer)) | |
688 | record_deleted_pid (pid); | |
689 | else | |
690 | synch_process_pid = pid; | |
691 | } | |
692 | ||
693 | unblock_child_signal (); | |
694 | unblock_input (); | |
695 | ||
cd5f8f60 RS |
696 | /* The MSDOS case did this already. */ |
697 | if (fd_error >= 0) | |
68c45bf0 | 698 | emacs_close (fd_error); |
2610078a | 699 | #endif /* not MSDOS */ |
80856e74 | 700 | |
60aeceb8 | 701 | /* Close most of our file descriptors, but not fd0 |
6b6e798b | 702 | since we will use that to read input from. */ |
68c45bf0 | 703 | emacs_close (filefd); |
1ef14cb4 LMI |
704 | if (fd_output >= 0) |
705 | emacs_close (fd_output); | |
799abb26 | 706 | if (fd1 >= 0 && fd1 != fd_error) |
68c45bf0 | 707 | emacs_close (fd1); |
80856e74 JB |
708 | } |
709 | ||
710 | if (pid < 0) | |
711 | { | |
bb5f74ee | 712 | errno = child_errno; |
80856e74 JB |
713 | report_file_error ("Doing vfork", Qnil); |
714 | } | |
715 | ||
d50d3dc8 | 716 | if (INTEGERP (buffer)) |
644d3f0d | 717 | return unbind_to (count, Qnil); |
80856e74 | 718 | |
d50d3dc8 | 719 | if (BUFFERP (buffer)) |
80856e74 JB |
720 | Fset_buffer (buffer); |
721 | ||
09494912 RS |
722 | if (NILP (buffer)) |
723 | { | |
724 | /* If BUFFER is nil, we must read process output once and then | |
725 | discard it, so setup coding system but with nil. */ | |
726 | setup_coding_system (Qnil, &process_coding); | |
659afede | 727 | process_coding.dst_multibyte = 0; |
09494912 RS |
728 | } |
729 | else | |
730 | { | |
731 | Lisp_Object val, *args2; | |
732 | ||
733 | val = Qnil; | |
734 | if (!NILP (Vcoding_system_for_read)) | |
735 | val = Vcoding_system_for_read; | |
736 | else | |
737 | { | |
738 | if (EQ (coding_systems, Qt)) | |
739 | { | |
f66c7cf8 | 740 | ptrdiff_t i; |
09494912 | 741 | |
0065d054 | 742 | SAFE_NALLOCA (args2, 1, nargs + 1); |
09494912 RS |
743 | args2[0] = Qcall_process; |
744 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
745 | coding_systems | |
746 | = Ffind_operation_coding_system (nargs + 1, args2); | |
747 | } | |
748 | if (CONSP (coding_systems)) | |
70949dac | 749 | val = XCAR (coding_systems); |
09494912 | 750 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 751 | val = XCAR (Vdefault_process_coding_system); |
09494912 RS |
752 | else |
753 | val = Qnil; | |
754 | } | |
91183bfd | 755 | Fcheck_coding_system (val); |
09494912 RS |
756 | /* In unibyte mode, character code conversion should not take |
757 | place but EOL conversion should. So, setup raw-text or one | |
758 | of the subsidiary according to the information just setup. */ | |
4b4deea2 | 759 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
09494912 | 760 | && !NILP (val)) |
91183bfd KH |
761 | val = raw_text_coding_system (val); |
762 | setup_coding_system (val, &process_coding); | |
659afede KH |
763 | process_coding.dst_multibyte |
764 | = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); | |
09494912 | 765 | } |
a0241d01 | 766 | process_coding.src_multibyte = 0; |
09494912 | 767 | |
80856e74 JB |
768 | immediate_quit = 1; |
769 | QUIT; | |
770 | ||
1ef14cb4 | 771 | if (output_to_buffer) |
19ed11ba | 772 | { |
60aeceb8 PE |
773 | enum { CALLPROC_BUFFER_SIZE_MIN = 16 * 1024 }; |
774 | enum { CALLPROC_BUFFER_SIZE_MAX = 4 * CALLPROC_BUFFER_SIZE_MIN }; | |
775 | char buf[CALLPROC_BUFFER_SIZE_MAX]; | |
776 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; | |
2f221583 PE |
777 | int nread; |
778 | bool first = 1; | |
19ed11ba AS |
779 | EMACS_INT total_read = 0; |
780 | int carryover = 0; | |
2f221583 | 781 | bool display_on_the_fly = display_p; |
19ed11ba AS |
782 | struct coding_system saved_coding; |
783 | ||
784 | saved_coding = process_coding; | |
785 | while (1) | |
786 | { | |
787 | /* Repeatedly read until we've filled as much as possible | |
788 | of the buffer size we have. But don't read | |
789 | less than 1024--save that for the next bufferful. */ | |
790 | nread = carryover; | |
791 | while (nread < bufsize - 1024) | |
792 | { | |
60aeceb8 | 793 | int this_read = emacs_read (fd0, buf + nread, |
19ed11ba | 794 | bufsize - nread); |
60558b19 | 795 | |
19ed11ba AS |
796 | if (this_read < 0) |
797 | goto give_up; | |
60558b19 | 798 | |
19ed11ba AS |
799 | if (this_read == 0) |
800 | { | |
801 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
802 | break; | |
803 | } | |
60558b19 | 804 | |
19ed11ba AS |
805 | nread += this_read; |
806 | total_read += this_read; | |
60558b19 | 807 | |
19ed11ba AS |
808 | if (display_on_the_fly) |
809 | break; | |
810 | } | |
60558b19 | 811 | |
19ed11ba AS |
812 | /* Now NREAD is the total amount of data in the buffer. */ |
813 | immediate_quit = 0; | |
177c0ea7 | 814 | |
19ed11ba AS |
815 | if (!NILP (buffer)) |
816 | { | |
817 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) | |
818 | && ! CODING_MAY_REQUIRE_DECODING (&process_coding)) | |
819 | insert_1_both (buf, nread, nread, 0, 1, 0); | |
820 | else | |
821 | { /* We have to decode the input. */ | |
822 | Lisp_Object curbuf; | |
d311d28c | 823 | ptrdiff_t count1 = SPECPDL_INDEX (); |
19ed11ba AS |
824 | |
825 | XSETBUFFER (curbuf, current_buffer); | |
826 | /* We cannot allow after-change-functions be run | |
827 | during decoding, because that might modify the | |
828 | buffer, while we rely on process_coding.produced to | |
829 | faithfully reflect inserted text until we | |
830 | TEMP_SET_PT_BOTH below. */ | |
831 | specbind (Qinhibit_modification_hooks, Qt); | |
832 | decode_coding_c_string (&process_coding, | |
833 | (unsigned char *) buf, nread, curbuf); | |
834 | unbind_to (count1, Qnil); | |
835 | if (display_on_the_fly | |
836 | && CODING_REQUIRE_DETECTION (&saved_coding) | |
837 | && ! CODING_REQUIRE_DETECTION (&process_coding)) | |
838 | { | |
839 | /* We have detected some coding system. But, | |
840 | there's a possibility that the detection was | |
841 | done by insufficient data. So, we give up | |
842 | displaying on the fly. */ | |
843 | if (process_coding.produced > 0) | |
844 | del_range_2 (process_coding.dst_pos, | |
845 | process_coding.dst_pos_byte, | |
846 | process_coding.dst_pos | |
847 | + process_coding.produced_char, | |
848 | process_coding.dst_pos_byte | |
849 | + process_coding.produced, 0); | |
850 | display_on_the_fly = 0; | |
851 | process_coding = saved_coding; | |
852 | carryover = nread; | |
853 | /* This is to make the above condition always | |
854 | fails in the future. */ | |
855 | saved_coding.common_flags | |
856 | &= ~CODING_REQUIRE_DETECTION_MASK; | |
857 | continue; | |
858 | } | |
859 | ||
860 | TEMP_SET_PT_BOTH (PT + process_coding.produced_char, | |
861 | PT_BYTE + process_coding.produced); | |
862 | carryover = process_coding.carryover_bytes; | |
863 | if (carryover > 0) | |
864 | memcpy (buf, process_coding.carryover, | |
865 | process_coding.carryover_bytes); | |
866 | } | |
867 | } | |
c5bfa12b | 868 | |
19ed11ba AS |
869 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
870 | break; | |
6e3bfbb2 | 871 | |
19ed11ba AS |
872 | /* Make the buffer bigger as we continue to read more data, |
873 | but not past CALLPROC_BUFFER_SIZE_MAX. */ | |
874 | if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) | |
875 | if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) | |
876 | bufsize = CALLPROC_BUFFER_SIZE_MAX; | |
6e3bfbb2 | 877 | |
19ed11ba AS |
878 | if (display_p) |
879 | { | |
880 | if (first) | |
881 | prepare_menu_bars (); | |
882 | first = 0; | |
883 | redisplay_preserve_echo_area (1); | |
884 | /* This variable might have been set to 0 for code | |
885 | detection. In that case, we set it back to 1 because | |
886 | we should have already detected a coding system. */ | |
887 | display_on_the_fly = 1; | |
888 | } | |
889 | immediate_quit = 1; | |
890 | QUIT; | |
891 | } | |
892 | give_up: ; | |
893 | ||
894 | Vlast_coding_system_used = CODING_ID_NAME (process_coding.id); | |
895 | /* If the caller required, let the buffer inherit the | |
896 | coding-system used to decode the process output. */ | |
897 | if (inherit_process_coding_system) | |
898 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
899 | make_number (total_read)); | |
900 | } | |
3b440bb5 | 901 | |
77defa9a | 902 | #ifndef MSDOS |
80856e74 | 903 | /* Wait for it to terminate, unless it already has. */ |
bb5f74ee | 904 | wait_for_termination (pid, &status, !output_to_buffer); |
77defa9a | 905 | #endif |
80856e74 JB |
906 | |
907 | immediate_quit = 0; | |
908 | ||
37d54121 RS |
909 | /* Don't kill any children that the subprocess may have left behind |
910 | when exiting. */ | |
bb5f74ee | 911 | synch_process_pid = 0; |
37d54121 | 912 | |
3c59b4c9 | 913 | SAFE_FREE (); |
80856e74 JB |
914 | unbind_to (count, Qnil); |
915 | ||
bb5f74ee | 916 | if (WIFSIGNALED (status)) |
6b61353c | 917 | { |
42ca4633 | 918 | const char *signame; |
6b61353c KH |
919 | |
920 | synchronize_system_messages_locale (); | |
bb5f74ee | 921 | signame = strsignal (WTERMSIG (status)); |
6b61353c KH |
922 | |
923 | if (signame == 0) | |
19ed11ba | 924 | signame = "unknown"; |
6b61353c | 925 | |
bb5f74ee PE |
926 | return code_convert_string_norecord (build_string (signame), |
927 | Vlocale_coding_system, 0); | |
6b61353c KH |
928 | } |
929 | ||
bb5f74ee PE |
930 | eassert (WIFEXITED (status)); |
931 | return make_number (WEXITSTATUS (status)); | |
80856e74 | 932 | } |
80856e74 | 933 | \f |
9fefd2ba | 934 | static Lisp_Object |
971de7fb | 935 | delete_temp_file (Lisp_Object name) |
80856e74 | 936 | { |
1a271e14 | 937 | /* Suppress jka-compr handling, etc. */ |
d311d28c | 938 | ptrdiff_t count = SPECPDL_INDEX (); |
1a271e14 | 939 | specbind (intern ("file-name-handler-alist"), Qnil); |
b0728617 EZ |
940 | #ifdef WINDOWSNT |
941 | /* If this is called when the subprocess didn't exit yet, the | |
942 | attempt to delete its input file will fail. In that case, we | |
943 | schedule the file for deletion when the subprocess exits. This | |
944 | is the 2nd part of handling this situation; see the call to | |
945 | record_infile in call-process above, for the first part. */ | |
946 | if (!internal_delete_file (name)) | |
947 | { | |
948 | Lisp_Object encoded_file = ENCODE_FILE (name); | |
949 | ||
950 | record_pending_deletion (SSDATA (encoded_file)); | |
951 | } | |
952 | #else | |
f1a5d776 | 953 | internal_delete_file (name); |
b0728617 | 954 | #endif |
1a271e14 | 955 | unbind_to (count, Qnil); |
320695d8 | 956 | return Qnil; |
80856e74 JB |
957 | } |
958 | ||
959 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
fdb82f93 PJ |
960 | 3, MANY, 0, |
961 | doc: /* Send text from START to END to a synchronous process running PROGRAM. | |
962 | The remaining arguments are optional. | |
963 | Delete the text if fourth arg DELETE is non-nil. | |
964 | ||
1ef14cb4 LMI |
965 | Insert output in BUFFER before point; t means current buffer; nil for |
966 | BUFFER means discard it; 0 means discard and don't wait; and `(:file | |
967 | FILE)', where FILE is a file name string, means that it should be | |
1b9f60cc | 968 | written to that file (if the file already exists it is overwritten). |
fdb82f93 PJ |
969 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
970 | REAL-BUFFER says what to do with standard output, as above, | |
971 | while STDERR-FILE says what to do with standard error in the child. | |
972 | STDERR-FILE may be nil (discard standard error output), | |
973 | t (mix it with ordinary output), or a file name string. | |
974 | ||
975 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
976 | Remaining args are passed to PROGRAM at startup as command args. | |
977 | ||
ba9a5174 | 978 | If BUFFER is 0, `call-process-region' returns immediately with value nil. |
fdb82f93 PJ |
979 | Otherwise it waits for PROGRAM to terminate |
980 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
981 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
982 | ||
983 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) | |
f66c7cf8 | 984 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 985 | { |
39323a7e KH |
986 | struct gcpro gcpro1; |
987 | Lisp_Object filename_string; | |
988 | register Lisp_Object start, end; | |
d311d28c | 989 | ptrdiff_t count = SPECPDL_INDEX (); |
08ee4e87 | 990 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
09494912 | 991 | Lisp_Object coding_systems; |
32d08644 | 992 | Lisp_Object val, *args2; |
f66c7cf8 | 993 | ptrdiff_t i; |
98c6f1e3 | 994 | Lisp_Object tmpdir; |
7e6c2178 | 995 | |
f92d51d8 CY |
996 | if (STRINGP (Vtemporary_file_directory)) |
997 | tmpdir = Vtemporary_file_directory; | |
7e6c2178 RS |
998 | else |
999 | { | |
f92d51d8 CY |
1000 | #ifndef DOS_NT |
1001 | if (getenv ("TMPDIR")) | |
1002 | tmpdir = build_string (getenv ("TMPDIR")); | |
1003 | else | |
1004 | tmpdir = build_string ("/tmp/"); | |
1005 | #else /* DOS_NT */ | |
1006 | char *outf; | |
1007 | if ((outf = egetenv ("TMPDIR")) | |
1008 | || (outf = egetenv ("TMP")) | |
1009 | || (outf = egetenv ("TEMP"))) | |
1010 | tmpdir = build_string (outf); | |
1011 | else | |
1012 | tmpdir = Ffile_name_as_directory (build_string ("c:/temp")); | |
0774fcf8 | 1013 | #endif |
f92d51d8 | 1014 | } |
7e6c2178 | 1015 | |
3c59b4c9 PE |
1016 | { |
1017 | USE_SAFE_ALLOCA; | |
98c6f1e3 | 1018 | Lisp_Object pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir); |
7c2fcf9b EZ |
1019 | Lisp_Object encoded_tem = ENCODE_FILE (pattern); |
1020 | char *tempfile = SAFE_ALLOCA (SBYTES (encoded_tem) + 1); | |
1021 | memcpy (tempfile, SDATA (encoded_tem), SBYTES (encoded_tem) + 1); | |
3c59b4c9 | 1022 | coding_systems = Qt; |
09494912 | 1023 | |
1ddc85a4 | 1024 | #ifdef HAVE_MKSTEMP |
3c59b4c9 PE |
1025 | { |
1026 | int fd; | |
1027 | ||
4d7e6e51 | 1028 | block_input (); |
3c59b4c9 | 1029 | fd = mkstemp (tempfile); |
4d7e6e51 | 1030 | unblock_input (); |
3c59b4c9 PE |
1031 | if (fd == -1) |
1032 | report_file_error ("Failed to open temporary file", | |
baac5bc7 | 1033 | Fcons (build_string (tempfile), Qnil)); |
3c59b4c9 PE |
1034 | else |
1035 | close (fd); | |
1036 | } | |
1ddc85a4 | 1037 | #else |
d3cefd13 | 1038 | errno = 0; |
3c59b4c9 | 1039 | mktemp (tempfile); |
d3cefd13 EZ |
1040 | if (!*tempfile) |
1041 | { | |
1042 | if (!errno) | |
1043 | errno = EEXIST; | |
1044 | report_file_error ("Failed to open temporary file using pattern", | |
1045 | Fcons (pattern, Qnil)); | |
1046 | } | |
1ddc85a4 | 1047 | #endif |
80856e74 | 1048 | |
3c59b4c9 PE |
1049 | filename_string = build_string (tempfile); |
1050 | GCPRO1 (filename_string); | |
1051 | SAFE_FREE (); | |
1052 | } | |
1053 | ||
80856e74 JB |
1054 | start = args[0]; |
1055 | end = args[1]; | |
32d08644 | 1056 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
1057 | if (!NILP (Vcoding_system_for_write)) |
1058 | val = Vcoding_system_for_write; | |
4b4deea2 | 1059 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
fcaf8878 | 1060 | val = Qraw_text; |
32d08644 | 1061 | else |
beacaab3 | 1062 | { |
3c59b4c9 | 1063 | USE_SAFE_ALLOCA; |
0065d054 | 1064 | SAFE_NALLOCA (args2, 1, nargs + 1); |
91489411 RS |
1065 | args2[0] = Qcall_process_region; |
1066 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1067 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); | |
fcaf8878 | 1068 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
3c59b4c9 | 1069 | SAFE_FREE (); |
beacaab3 | 1070 | } |
fcaf8878 | 1071 | val = complement_process_encoding_system (val); |
32d08644 | 1072 | |
168afdaa | 1073 | { |
d311d28c | 1074 | ptrdiff_t count1 = SPECPDL_INDEX (); |
168afdaa RS |
1075 | |
1076 | specbind (intern ("coding-system-for-write"), val); | |
bb951f0e KR |
1077 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
1078 | happen to get a ".Z" suffix. */ | |
1079 | specbind (intern ("file-name-handler-alist"), Qnil); | |
168afdaa RS |
1080 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil); |
1081 | ||
1082 | unbind_to (count1, Qnil); | |
1083 | } | |
91489411 | 1084 | |
177c0ea7 | 1085 | /* Note that Fcall_process takes care of binding |
91489411 | 1086 | coding-system-for-read. */ |
093650fe | 1087 | |
80856e74 JB |
1088 | record_unwind_protect (delete_temp_file, filename_string); |
1089 | ||
edf496dd | 1090 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
1091 | Fdelete_region (start, end); |
1092 | ||
edf496dd KH |
1093 | if (nargs > 3) |
1094 | { | |
1095 | args += 2; | |
1096 | nargs -= 2; | |
1097 | } | |
1098 | else | |
1099 | { | |
1100 | args[0] = args[2]; | |
1101 | nargs = 2; | |
1102 | } | |
1103 | args[1] = filename_string; | |
80856e74 | 1104 | |
edf496dd | 1105 | RETURN_UNGCPRO (unbind_to (count, Fcall_process (nargs, args))); |
80856e74 JB |
1106 | } |
1107 | \f | |
361358ea | 1108 | #ifndef WINDOWSNT |
971de7fb | 1109 | static int relocate_fd (int fd, int minfd); |
361358ea | 1110 | #endif |
dfcf069d | 1111 | |
5990851d KL |
1112 | static char ** |
1113 | add_env (char **env, char **new_env, char *string) | |
1114 | { | |
1115 | char **ep; | |
2f221583 | 1116 | bool ok = 1; |
5990851d KL |
1117 | if (string == NULL) |
1118 | return new_env; | |
1119 | ||
1120 | /* See if this string duplicates any string already in the env. | |
1121 | If so, don't put it in. | |
1122 | When an env var has multiple definitions, | |
1123 | we keep the definition that comes first in process-environment. */ | |
1124 | for (ep = env; ok && ep != new_env; ep++) | |
1125 | { | |
1126 | char *p = *ep, *q = string; | |
1127 | while (ok) | |
19ed11ba AS |
1128 | { |
1129 | if (*q != *p) | |
1130 | break; | |
1131 | if (*q == 0) | |
1132 | /* The string is a lone variable name; keep it for now, we | |
1133 | will remove it later. It is a placeholder for a | |
1134 | variable that is not to be included in the environment. */ | |
1135 | break; | |
1136 | if (*q == '=') | |
1137 | ok = 0; | |
1138 | p++, q++; | |
1139 | } | |
5990851d KL |
1140 | } |
1141 | if (ok) | |
1142 | *new_env++ = string; | |
1143 | return new_env; | |
1144 | } | |
1145 | ||
80856e74 JB |
1146 | /* This is the last thing run in a newly forked inferior |
1147 | either synchronous or asynchronous. | |
1148 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
1149 | Initialize inferior's priority, pgrp, connected dir and environment. | |
1150 | then exec another program based on new_argv. | |
1151 | ||
2f221583 | 1152 | If SET_PGRP, put the subprocess into a separate process group. |
e576cab4 JB |
1153 | |
1154 | CURRENT_DIR is an elisp string giving the path of the current | |
1155 | directory the subprocess should have. Since we can't really signal | |
1156 | a decent error from within the child, this should be verified as an | |
1157 | executable directory by the parent. */ | |
80856e74 | 1158 | |
dfcf069d | 1159 | int |
2f221583 PE |
1160 | child_setup (int in, int out, int err, char **new_argv, bool set_pgrp, |
1161 | Lisp_Object current_dir) | |
80856e74 | 1162 | { |
e576cab4 | 1163 | char **env; |
7fcf7f05 | 1164 | char *pwd_var; |
bad95d8f RS |
1165 | #ifdef WINDOWSNT |
1166 | int cpid; | |
4252a4bd | 1167 | HANDLE handles[3]; |
bad95d8f | 1168 | #endif /* WINDOWSNT */ |
e576cab4 | 1169 | |
d311d28c | 1170 | pid_t pid = getpid (); |
80856e74 | 1171 | |
80856e74 JB |
1172 | /* Close Emacs's descriptors that this process should not have. */ |
1173 | close_process_descs (); | |
ded80a25 | 1174 | |
c17c4250 EZ |
1175 | /* DOS_NT isn't in a vfork, so if we are in the middle of load-file, |
1176 | we will lose if we call close_load_descs here. */ | |
1177 | #ifndef DOS_NT | |
4458cebe | 1178 | close_load_descs (); |
c17c4250 | 1179 | #endif |
80856e74 JB |
1180 | |
1181 | /* Note that use of alloca is always safe here. It's obvious for systems | |
1182 | that do not have true vfork or that have true (stack) alloca. | |
caa01fe0 GM |
1183 | If using vfork and C_ALLOCA (when Emacs used to include |
1184 | src/alloca.c) it is safe because that changes the superior's | |
1185 | static variables as if the superior had done alloca and will be | |
1186 | cleaned up in the usual way. */ | |
e576cab4 | 1187 | { |
7fcf7f05 | 1188 | register char *temp; |
0065d054 | 1189 | size_t i; /* size_t, because ptrdiff_t might overflow here! */ |
77d78be1 | 1190 | |
d5db4077 | 1191 | i = SBYTES (current_dir); |
16425c4a EZ |
1192 | #ifdef MSDOS |
1193 | /* MSDOS must have all environment variables malloc'ed, because | |
1194 | low-level libc functions that launch subsidiary processes rely | |
1195 | on that. */ | |
23f86fce | 1196 | pwd_var = xmalloc (i + 6); |
16425c4a | 1197 | #else |
38182d90 | 1198 | pwd_var = alloca (i + 6); |
16425c4a | 1199 | #endif |
7fcf7f05 | 1200 | temp = pwd_var + 4; |
72af86bd AS |
1201 | memcpy (pwd_var, "PWD=", 4); |
1202 | memcpy (temp, SDATA (current_dir), i); | |
bad95d8f | 1203 | if (!IS_DIRECTORY_SEP (temp[i - 1])) temp[i++] = DIRECTORY_SEP; |
e576cab4 JB |
1204 | temp[i] = 0; |
1205 | ||
c17c4250 | 1206 | #ifndef DOS_NT |
e576cab4 JB |
1207 | /* We can't signal an Elisp error here; we're in a vfork. Since |
1208 | the callers check the current directory before forking, this | |
1209 | should only return an error if the directory's permissions | |
1210 | are changed between the check and this chdir, but we should | |
1211 | at least check. */ | |
1212 | if (chdir (temp) < 0) | |
20b25e46 | 1213 | _exit (errno); |
f8d23104 | 1214 | #else /* DOS_NT */ |
c17c4250 EZ |
1215 | /* Get past the drive letter, so that d:/ is left alone. */ |
1216 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
1217 | { | |
1218 | temp += 2; | |
1219 | i -= 2; | |
1220 | } | |
f8d23104 | 1221 | #endif /* DOS_NT */ |
c17c4250 | 1222 | |
7fcf7f05 | 1223 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 1224 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 1225 | temp[--i] = 0; |
e576cab4 | 1226 | } |
80856e74 | 1227 | |
5990851d | 1228 | /* Set `env' to a vector of the strings in the environment. */ |
80856e74 JB |
1229 | { |
1230 | register Lisp_Object tem; | |
1231 | register char **new_env; | |
5990851d | 1232 | char **p, **q; |
80856e74 | 1233 | register int new_length; |
d2bb6598 | 1234 | Lisp_Object display = Qnil; |
361358ea | 1235 | |
80856e74 | 1236 | new_length = 0; |
f105f403 | 1237 | |
80856e74 | 1238 | for (tem = Vprocess_environment; |
19ed11ba AS |
1239 | CONSP (tem) && STRINGP (XCAR (tem)); |
1240 | tem = XCDR (tem)) | |
d2bb6598 | 1241 | { |
42a5b22f | 1242 | if (strncmp (SSDATA (XCAR (tem)), "DISPLAY", 7) == 0 |
d2bb6598 SM |
1243 | && (SDATA (XCAR (tem)) [7] == '\0' |
1244 | || SDATA (XCAR (tem)) [7] == '=')) | |
1245 | /* DISPLAY is specified in process-environment. */ | |
1246 | display = Qt; | |
1247 | new_length++; | |
1248 | } | |
de87fb59 | 1249 | |
d2bb6598 SM |
1250 | /* If not provided yet, use the frame's DISPLAY. */ |
1251 | if (NILP (display)) | |
1252 | { | |
1253 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); | |
1254 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) | |
1255 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1256 | tmp = Fgetenv_internal (build_string ("DISPLAY"), | |
1257 | Vinitial_environment); | |
1258 | if (STRINGP (tmp)) | |
1259 | { | |
1260 | display = tmp; | |
1261 | new_length++; | |
1262 | } | |
1263 | } | |
80856e74 | 1264 | |
7fcf7f05 | 1265 | /* new_length + 2 to include PWD and terminating 0. */ |
38182d90 | 1266 | env = new_env = alloca ((new_length + 2) * sizeof *env); |
7fcf7f05 RS |
1267 | /* If we have a PWD envvar, pass one down, |
1268 | but with corrected value. */ | |
a13f8f50 | 1269 | if (egetenv ("PWD")) |
7fcf7f05 | 1270 | *new_env++ = pwd_var; |
361358ea | 1271 | |
6b8e474c | 1272 | if (STRINGP (display)) |
de87fb59 | 1273 | { |
38182d90 | 1274 | char *vdata = alloca (sizeof "DISPLAY=" + SBYTES (display)); |
de87fb59 | 1275 | strcpy (vdata, "DISPLAY="); |
42a5b22f | 1276 | strcat (vdata, SSDATA (display)); |
de87fb59 DN |
1277 | new_env = add_env (env, new_env, vdata); |
1278 | } | |
80856e74 | 1279 | |
5990851d | 1280 | /* Overrides. */ |
80856e74 | 1281 | for (tem = Vprocess_environment; |
70949dac KR |
1282 | CONSP (tem) && STRINGP (XCAR (tem)); |
1283 | tem = XCDR (tem)) | |
42a5b22f | 1284 | new_env = add_env (env, new_env, SSDATA (XCAR (tem))); |
d2bb6598 | 1285 | |
5990851d KL |
1286 | *new_env = 0; |
1287 | ||
1288 | /* Remove variable names without values. */ | |
1289 | p = q = env; | |
1290 | while (*p != 0) | |
cd9565ba | 1291 | { |
19ed11ba AS |
1292 | while (*q != 0 && strchr (*q, '=') == NULL) |
1293 | q++; | |
1294 | *p = *q++; | |
1295 | if (*p != 0) | |
1296 | p++; | |
cd9565ba | 1297 | } |
80856e74 | 1298 | } |
de87fb59 | 1299 | |
361358ea | 1300 | |
bad95d8f RS |
1301 | #ifdef WINDOWSNT |
1302 | prepare_standard_handles (in, out, err, handles); | |
d5db4077 | 1303 | set_process_dir (SDATA (current_dir)); |
d3d14b40 | 1304 | /* Spawn the child. (See w32proc.c:sys_spawnve). */ |
67802943 DN |
1305 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); |
1306 | reset_standard_handles (in, out, err, handles); | |
1307 | if (cpid == -1) | |
1308 | /* An error occurred while trying to spawn the process. */ | |
1309 | report_file_error ("Spawning child process", Qnil); | |
1310 | return cpid; | |
1311 | ||
bad95d8f | 1312 | #else /* not WINDOWSNT */ |
426b37ae JB |
1313 | /* Make sure that in, out, and err are not actually already in |
1314 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1315 | started with its standard in, out, or error closed, as might |
426b37ae | 1316 | happen under X. */ |
f29f9e4a RS |
1317 | { |
1318 | int oin = in, oout = out; | |
1319 | ||
1320 | /* We have to avoid relocating the same descriptor twice! */ | |
1321 | ||
1322 | in = relocate_fd (in, 3); | |
1323 | ||
1324 | if (out == oin) | |
1325 | out = in; | |
1326 | else | |
3e9367e7 | 1327 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1328 | |
1329 | if (err == oin) | |
1330 | err = in; | |
1331 | else if (err == oout) | |
1332 | err = out; | |
1333 | else | |
3e9367e7 | 1334 | err = relocate_fd (err, 3); |
f29f9e4a | 1335 | } |
426b37ae | 1336 | |
c17c4250 | 1337 | #ifndef MSDOS |
68c45bf0 PE |
1338 | emacs_close (0); |
1339 | emacs_close (1); | |
1340 | emacs_close (2); | |
80856e74 JB |
1341 | |
1342 | dup2 (in, 0); | |
1343 | dup2 (out, 1); | |
1344 | dup2 (err, 2); | |
68c45bf0 | 1345 | emacs_close (in); |
ce8f5a9a AS |
1346 | if (out != in) |
1347 | emacs_close (out); | |
1348 | if (err != in && err != out) | |
1349 | emacs_close (err); | |
80856e74 | 1350 | |
dd0333b6 | 1351 | setpgid (0, 0); |
12e610e8 | 1352 | tcsetpgrp (0, pid); |
a7ebc409 | 1353 | |
21e54a94 | 1354 | execve (new_argv[0], new_argv, env); |
80856e74 | 1355 | |
68c45bf0 PE |
1356 | emacs_write (1, "Can't exec program: ", 20); |
1357 | emacs_write (1, new_argv[0], strlen (new_argv[0])); | |
1358 | emacs_write (1, "\n", 1); | |
80856e74 | 1359 | _exit (1); |
67802943 DN |
1360 | |
1361 | #else /* MSDOS */ | |
1362 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
1363 | xfree (pwd_var); | |
1364 | if (pid == -1) | |
1365 | /* An error occurred while trying to run the subprocess. */ | |
1366 | report_file_error ("Spawning child process", Qnil); | |
1367 | return pid; | |
1368 | #endif /* MSDOS */ | |
ae76d9e1 | 1369 | #endif /* not WINDOWSNT */ |
80856e74 JB |
1370 | } |
1371 | ||
361358ea | 1372 | #ifndef WINDOWSNT |
a3833dfe | 1373 | /* Move the file descriptor FD so that its number is not less than MINFD. |
426b37ae | 1374 | If the file descriptor is moved at all, the original is freed. */ |
dfcf069d | 1375 | static int |
971de7fb | 1376 | relocate_fd (int fd, int minfd) |
426b37ae | 1377 | { |
a3833dfe | 1378 | if (fd >= minfd) |
426b37ae JB |
1379 | return fd; |
1380 | else | |
1381 | { | |
49cdacda | 1382 | int new = fcntl (fd, F_DUPFD, minfd); |
426b37ae JB |
1383 | if (new == -1) |
1384 | { | |
cb1d0ef7 | 1385 | const char *message_1 = "Error while setting up child: "; |
a8fe7202 | 1386 | const char *errmessage = strerror (errno); |
cb1d0ef7 PE |
1387 | const char *message_2 = "\n"; |
1388 | emacs_write (2, message_1, strlen (message_1)); | |
68c45bf0 | 1389 | emacs_write (2, errmessage, strlen (errmessage)); |
cb1d0ef7 | 1390 | emacs_write (2, message_2, strlen (message_2)); |
426b37ae JB |
1391 | _exit (1); |
1392 | } | |
68c45bf0 | 1393 | emacs_close (fd); |
426b37ae JB |
1394 | return new; |
1395 | } | |
1396 | } | |
361358ea | 1397 | #endif /* not WINDOWSNT */ |
426b37ae | 1398 | |
2f221583 | 1399 | static bool |
989f33ba PE |
1400 | getenv_internal_1 (const char *var, ptrdiff_t varlen, char **value, |
1401 | ptrdiff_t *valuelen, Lisp_Object env) | |
012c6fcb | 1402 | { |
db699fc6 | 1403 | for (; CONSP (env); env = XCDR (env)) |
012c6fcb | 1404 | { |
db699fc6 | 1405 | Lisp_Object entry = XCAR (env); |
d50d3dc8 | 1406 | if (STRINGP (entry) |
db699fc6 | 1407 | && SBYTES (entry) >= varlen |
bad95d8f RS |
1408 | #ifdef WINDOWSNT |
1409 | /* NT environment variables are case insensitive. */ | |
d5db4077 | 1410 | && ! strnicmp (SDATA (entry), var, varlen) |
bad95d8f | 1411 | #else /* not WINDOWSNT */ |
72af86bd | 1412 | && ! memcmp (SDATA (entry), var, varlen) |
bad95d8f | 1413 | #endif /* not WINDOWSNT */ |
a9971c6d | 1414 | ) |
012c6fcb | 1415 | { |
db699fc6 SM |
1416 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') |
1417 | { | |
51b59d79 | 1418 | *value = SSDATA (entry) + (varlen + 1); |
db699fc6 SM |
1419 | *valuelen = SBYTES (entry) - (varlen + 1); |
1420 | return 1; | |
1421 | } | |
1422 | else if (SBYTES (entry) == varlen) | |
1423 | { | |
1424 | /* Lone variable names in Vprocess_environment mean that | |
1425 | variable should be removed from the environment. */ | |
1426 | *value = NULL; | |
1427 | return 1; | |
1428 | } | |
1429 | } | |
1430 | } | |
1431 | return 0; | |
1432 | } | |
1433 | ||
2f221583 | 1434 | static bool |
989f33ba PE |
1435 | getenv_internal (const char *var, ptrdiff_t varlen, char **value, |
1436 | ptrdiff_t *valuelen, Lisp_Object frame) | |
012c6fcb | 1437 | { |
d2bb6598 SM |
1438 | /* Try to find VAR in Vprocess_environment first. */ |
1439 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1440 | Vprocess_environment)) | |
1441 | return *value ? 1 : 0; | |
f105f403 | 1442 | |
d2bb6598 | 1443 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
de87fb59 | 1444 | if (strcmp (var, "DISPLAY") == 0) |
d2bb6598 SM |
1445 | { |
1446 | Lisp_Object display | |
1447 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); | |
1448 | if (STRINGP (display)) | |
1449 | { | |
51b59d79 | 1450 | *value = SSDATA (display); |
de87fb59 | 1451 | *valuelen = SBYTES (display); |
012c6fcb JA |
1452 | return 1; |
1453 | } | |
d2bb6598 SM |
1454 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
1455 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1456 | Vinitial_environment)) | |
1457 | return *value ? 1 : 0; | |
012c6fcb JA |
1458 | } |
1459 | ||
1460 | return 0; | |
1461 | } | |
1462 | ||
f105f403 | 1463 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
5990851d KL |
1464 | doc: /* Get the value of environment variable VARIABLE. |
1465 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
1466 | the environment. Otherwise, value is a string. | |
f105f403 | 1467 | |
acf20901 | 1468 | This function searches `process-environment' for VARIABLE. |
5990851d | 1469 | |
db699fc6 | 1470 | If optional parameter ENV is a list, then search this list instead of |
acf20901 JB |
1471 | `process-environment', and return t when encountering a negative entry |
1472 | \(an entry for a variable with no value). */) | |
5842a27b | 1473 | (Lisp_Object variable, Lisp_Object env) |
012c6fcb JA |
1474 | { |
1475 | char *value; | |
989f33ba | 1476 | ptrdiff_t valuelen; |
012c6fcb | 1477 | |
5990851d | 1478 | CHECK_STRING (variable); |
db699fc6 SM |
1479 | if (CONSP (env)) |
1480 | { | |
42a5b22f | 1481 | if (getenv_internal_1 (SSDATA (variable), SBYTES (variable), |
db699fc6 SM |
1482 | &value, &valuelen, env)) |
1483 | return value ? make_string (value, valuelen) : Qt; | |
1484 | else | |
1485 | return Qnil; | |
1486 | } | |
42a5b22f | 1487 | else if (getenv_internal (SSDATA (variable), SBYTES (variable), |
d2bb6598 | 1488 | &value, &valuelen, env)) |
012c6fcb JA |
1489 | return make_string (value, valuelen); |
1490 | else | |
1491 | return Qnil; | |
1492 | } | |
1493 | ||
5990851d KL |
1494 | /* A version of getenv that consults the Lisp environment lists, |
1495 | easily callable from C. */ | |
012c6fcb | 1496 | char * |
a8fe7202 | 1497 | egetenv (const char *var) |
012c6fcb JA |
1498 | { |
1499 | char *value; | |
25c7e41f | 1500 | ptrdiff_t valuelen; |
012c6fcb | 1501 | |
f105f403 | 1502 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
012c6fcb JA |
1503 | return value; |
1504 | else | |
1505 | return 0; | |
1506 | } | |
1507 | ||
80856e74 | 1508 | \f |
8de15d69 | 1509 | /* This is run before init_cmdargs. */ |
177c0ea7 | 1510 | |
dfcf069d | 1511 | void |
971de7fb | 1512 | init_callproc_1 (void) |
8de15d69 | 1513 | { |
d01ba2f1 GM |
1514 | #ifdef HAVE_NS |
1515 | const char *etc_dir = ns_etc_directory (); | |
cbb31951 | 1516 | const char *path_exec = ns_exec_path (); |
d01ba2f1 | 1517 | #endif |
35a2f4b8 | 1518 | |
76151e2c | 1519 | Vdata_directory = decode_env_path ("EMACSDATA", |
d01ba2f1 | 1520 | #ifdef HAVE_NS |
76151e2c | 1521 | etc_dir ? etc_dir : |
d01ba2f1 | 1522 | #endif |
76151e2c EZ |
1523 | PATH_DATA); |
1524 | Vdata_directory = Ffile_name_as_directory (Fcar (Vdata_directory)); | |
1525 | ||
1526 | Vdoc_directory = decode_env_path ("EMACSDOC", | |
d01ba2f1 | 1527 | #ifdef HAVE_NS |
76151e2c | 1528 | etc_dir ? etc_dir : |
d01ba2f1 | 1529 | #endif |
76151e2c EZ |
1530 | PATH_DOC); |
1531 | Vdoc_directory = Ffile_name_as_directory (Fcar (Vdoc_directory)); | |
9453ea7b | 1532 | |
e576cab4 | 1533 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1534 | PATH_EXEC path from epaths.h. */ |
cbb31951 GM |
1535 | Vexec_path = decode_env_path ("EMACSPATH", |
1536 | #ifdef HAVE_NS | |
1537 | path_exec ? path_exec : | |
1538 | #endif | |
1539 | PATH_EXEC); | |
80856e74 | 1540 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
cbb31951 | 1541 | /* FIXME? For ns, path_exec should go at the front? */ |
80856e74 | 1542 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); |
8de15d69 RS |
1543 | } |
1544 | ||
e17f7533 | 1545 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1546 | |
dfcf069d | 1547 | void |
971de7fb | 1548 | init_callproc (void) |
8de15d69 RS |
1549 | { |
1550 | char *data_dir = egetenv ("EMACSDATA"); | |
177c0ea7 | 1551 | |
8de15d69 RS |
1552 | register char * sh; |
1553 | Lisp_Object tempdir; | |
d01ba2f1 GM |
1554 | #ifdef HAVE_NS |
1555 | if (data_dir == 0) | |
1556 | { | |
1557 | const char *etc_dir = ns_etc_directory (); | |
1558 | if (etc_dir) | |
1559 | { | |
1560 | data_dir = alloca (strlen (etc_dir) + 1); | |
1561 | strcpy (data_dir, etc_dir); | |
1562 | } | |
1563 | } | |
1564 | #endif | |
8de15d69 | 1565 | |
9cc4fad5 | 1566 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1567 | { |
05630743 RS |
1568 | /* Add to the path the lib-src subdir of the installation dir. */ |
1569 | Lisp_Object tem; | |
1570 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1571 | Vinstallation_directory); | |
76151e2c | 1572 | #ifndef MSDOS |
1a6640ec | 1573 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc | 1574 | if (NILP (Fmember (tem, Vexec_path))) |
70ec1377 | 1575 | { |
cbb31951 GM |
1576 | #ifdef HAVE_NS |
1577 | const char *path_exec = ns_exec_path (); | |
1578 | #endif | |
1579 | Vexec_path = decode_env_path ("EMACSPATH", | |
1580 | #ifdef HAVE_NS | |
1581 | path_exec ? path_exec : | |
1582 | #endif | |
1583 | PATH_EXEC); | |
70ec1377 RS |
1584 | Vexec_path = Fcons (tem, Vexec_path); |
1585 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
1586 | } | |
177c0ea7 | 1587 | |
0fa248bc | 1588 | Vexec_directory = Ffile_name_as_directory (tem); |
76151e2c | 1589 | #endif /* not MSDOS */ |
8de15d69 | 1590 | |
e17f7533 RS |
1591 | /* Maybe use ../etc as well as ../lib-src. */ |
1592 | if (data_dir == 0) | |
1593 | { | |
1594 | tem = Fexpand_file_name (build_string ("etc"), | |
1595 | Vinstallation_directory); | |
1596 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1597 | } |
1598 | } | |
7e933683 RS |
1599 | |
1600 | /* Look for the files that should be in etc. We don't use | |
1601 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1602 | near the executable, and they are never in the build |
7e933683 RS |
1603 | directory when that's different from the source directory. |
1604 | ||
1605 | Instead, if these files are not in the nominal place, we try the | |
1606 | source directory. */ | |
1607 | if (data_dir == 0) | |
1608 | { | |
70ec1377 | 1609 | Lisp_Object tem, tem1, srcdir; |
7e933683 | 1610 | |
70ec1377 RS |
1611 | srcdir = Fexpand_file_name (build_string ("../src/"), |
1612 | build_string (PATH_DUMPLOADSEARCH)); | |
7e933683 RS |
1613 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); |
1614 | tem1 = Ffile_exists_p (tem); | |
70ec1377 | 1615 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
7e933683 | 1616 | { |
70ec1377 | 1617 | Lisp_Object newdir; |
7e933683 RS |
1618 | newdir = Fexpand_file_name (build_string ("../etc/"), |
1619 | build_string (PATH_DUMPLOADSEARCH)); | |
1620 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1621 | tem1 = Ffile_exists_p (tem); | |
1622 | if (!NILP (tem1)) | |
1623 | Vdata_directory = newdir; | |
1624 | } | |
1625 | } | |
80856e74 | 1626 | |
d883eb62 RS |
1627 | #ifndef CANNOT_DUMP |
1628 | if (initialized) | |
1629 | #endif | |
1630 | { | |
1631 | tempdir = Fdirectory_file_name (Vexec_directory); | |
73dcdb9f PE |
1632 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
1633 | dir_warning ("arch-dependent data dir", Vexec_directory); | |
d883eb62 | 1634 | } |
80856e74 | 1635 | |
e576cab4 | 1636 | tempdir = Fdirectory_file_name (Vdata_directory); |
73dcdb9f PE |
1637 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
1638 | dir_warning ("arch-independent data dir", Vdata_directory); | |
e576cab4 | 1639 | |
e576cab4 | 1640 | sh = (char *) getenv ("SHELL"); |
80856e74 | 1641 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
8abd035b | 1642 | |
40b49d4b JB |
1643 | #ifdef DOS_NT |
1644 | Vshared_game_score_directory = Qnil; | |
1645 | #else | |
63789758 | 1646 | Vshared_game_score_directory = build_string (PATH_GAME); |
73dcdb9f | 1647 | if (NILP (Ffile_accessible_directory_p (Vshared_game_score_directory))) |
63789758 | 1648 | Vshared_game_score_directory = Qnil; |
40b49d4b | 1649 | #endif |
9fefd2ba JB |
1650 | } |
1651 | ||
dfcf069d | 1652 | void |
971de7fb | 1653 | set_initial_environment (void) |
9fefd2ba | 1654 | { |
738db178 DN |
1655 | char **envp; |
1656 | for (envp = environ; *envp; envp++) | |
1657 | Vprocess_environment = Fcons (build_string (*envp), | |
1658 | Vprocess_environment); | |
1659 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent | |
1660 | to use `delete' and friends on process-environment. */ | |
1661 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); | |
80856e74 JB |
1662 | } |
1663 | ||
dfcf069d | 1664 | void |
971de7fb | 1665 | syms_of_callproc (void) |
80856e74 | 1666 | { |
f92d51d8 CY |
1667 | #ifndef DOS_NT |
1668 | Vtemp_file_name_pattern = build_string ("emacsXXXXXX"); | |
1669 | #elif defined (WINDOWSNT) | |
1670 | Vtemp_file_name_pattern = build_string ("emXXXXXX"); | |
1671 | #else | |
1672 | Vtemp_file_name_pattern = build_string ("detmp.XXX"); | |
1673 | #endif | |
1674 | staticpro (&Vtemp_file_name_pattern); | |
1675 | ||
29208e82 | 1676 | DEFVAR_LISP ("shell-file-name", Vshell_file_name, |
fb7ada5f | 1677 | doc: /* File name to load inferior shells from. |
b20b29be EZ |
1678 | Initialized from the SHELL environment variable, or to a system-dependent |
1679 | default if SHELL is not set. */); | |
80856e74 | 1680 | |
29208e82 | 1681 | DEFVAR_LISP ("exec-path", Vexec_path, |
fb7ada5f | 1682 | doc: /* List of directories to search programs to run in subprocesses. |
fdb82f93 | 1683 | Each element is a string (directory name) or nil (try default directory). */); |
80856e74 | 1684 | |
29208e82 | 1685 | DEFVAR_LISP ("exec-suffixes", Vexec_suffixes, |
fb7ada5f | 1686 | doc: /* List of suffixes to try to find executable file names. |
fdb82f93 | 1687 | Each element is a string. */); |
33d5af99 | 1688 | Vexec_suffixes = Qnil; |
b81a1b72 | 1689 | |
29208e82 | 1690 | DEFVAR_LISP ("exec-directory", Vexec_directory, |
fdb82f93 PJ |
1691 | doc: /* Directory for executables for Emacs to invoke. |
1692 | More generally, this includes any architecture-dependent files | |
1693 | that are built and installed from the Emacs distribution. */); | |
e576cab4 | 1694 | |
29208e82 | 1695 | DEFVAR_LISP ("data-directory", Vdata_directory, |
fdb82f93 PJ |
1696 | doc: /* Directory of machine-independent files that come with GNU Emacs. |
1697 | These are files intended for Emacs to use while it runs. */); | |
80856e74 | 1698 | |
29208e82 | 1699 | DEFVAR_LISP ("doc-directory", Vdoc_directory, |
fdb82f93 | 1700 | doc: /* Directory containing the DOC file that comes with GNU Emacs. |
ebf24b59 | 1701 | This is usually the same as `data-directory'. */); |
35a2f4b8 | 1702 | |
29208e82 | 1703 | DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory, |
fdb82f93 PJ |
1704 | doc: /* For internal use by the build procedure only. |
1705 | This is the name of the directory in which the build procedure installed | |
ebf24b59 | 1706 | Emacs's info files; the default value for `Info-default-directory-list' |
fdb82f93 | 1707 | includes this. */); |
ed61592a JB |
1708 | Vconfigure_info_directory = build_string (PATH_INFO); |
1709 | ||
29208e82 | 1710 | DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory, |
b065672a CW |
1711 | doc: /* Directory of score files for games which come with GNU Emacs. |
1712 | If this variable is nil, then Emacs is unable to use a shared directory. */); | |
40b49d4b JB |
1713 | #ifdef DOS_NT |
1714 | Vshared_game_score_directory = Qnil; | |
1715 | #else | |
63789758 | 1716 | Vshared_game_score_directory = build_string (PATH_GAME); |
40b49d4b | 1717 | #endif |
b065672a | 1718 | |
29208e82 | 1719 | DEFVAR_LISP ("initial-environment", Vinitial_environment, |
6b8e474c SM |
1720 | doc: /* List of environment variables inherited from the parent process. |
1721 | Each element should be a string of the form ENVVARNAME=VALUE. | |
1722 | The elements must normally be decoded (using `locale-coding-system') for use. */); | |
1723 | Vinitial_environment = Qnil; | |
1724 | ||
29208e82 | 1725 | DEFVAR_LISP ("process-environment", Vprocess_environment, |
5990851d | 1726 | doc: /* List of overridden environment variables for subprocesses to inherit. |
fdb82f93 | 1727 | Each element should be a string of the form ENVVARNAME=VALUE. |
5990851d | 1728 | |
a13f8f50 KL |
1729 | Entries in this list take precedence to those in the frame-local |
1730 | environments. Therefore, let-binding `process-environment' is an easy | |
1731 | way to temporarily change the value of an environment variable, | |
1732 | irrespective of where it comes from. To use `process-environment' to | |
1733 | remove an environment variable, include only its name in the list, | |
1734 | without "=VALUE". | |
5990851d KL |
1735 | |
1736 | This variable is set to nil when Emacs starts. | |
1737 | ||
fdb82f93 PJ |
1738 | If multiple entries define the same variable, the first one always |
1739 | takes precedence. | |
5990851d | 1740 | |
776a24a1 | 1741 | Non-ASCII characters are encoded according to the initial value of |
5990851d KL |
1742 | `locale-coding-system', i.e. the elements must normally be decoded for |
1743 | use. | |
1744 | ||
776a24a1 | 1745 | See `setenv' and `getenv'. */); |
86f5ca04 | 1746 | Vprocess_environment = Qnil; |
80856e74 | 1747 | |
80856e74 | 1748 | defsubr (&Scall_process); |
83fa009c | 1749 | defsubr (&Sgetenv_internal); |
e576cab4 | 1750 | defsubr (&Scall_process_region); |
80856e74 | 1751 | } |