Commit | Line | Data |
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80856e74 | 1 | /* Synchronous subprocess invocation for GNU Emacs. |
908589fd | 2 | Copyright (C) 1985-1988, 1993-1995, 1999-2013 |
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 | |
1d442672 | 34 | #include <sys/socket.h> /* for fcntl */ |
bad95d8f | 35 | #include <windows.h> |
489f9371 | 36 | #include "w32.h" |
bad95d8f RS |
37 | #define _P_NOWAIT 1 /* from process.h */ |
38 | #endif | |
39 | ||
7e6c2178 | 40 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
7e6c2178 RS |
41 | #include <sys/stat.h> |
42 | #include <sys/param.h> | |
7e6c2178 RS |
43 | #endif /* MSDOS */ |
44 | ||
80856e74 | 45 | #include "commands.h" |
91183bfd | 46 | #include "character.h" |
e5560ff7 | 47 | #include "buffer.h" |
edf496dd | 48 | #include "ccl.h" |
32d08644 | 49 | #include "coding.h" |
f0b950cf | 50 | #include "composite.h" |
57bda87a | 51 | #include <epaths.h> |
80856e74 | 52 | #include "process.h" |
d177f194 | 53 | #include "syssignal.h" |
a129418f | 54 | #include "systty.h" |
afea8a8a | 55 | #include "syswait.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 | ||
d01ba2f1 GM |
64 | #ifdef HAVE_NS |
65 | #include "nsterm.h" | |
66 | #endif | |
67 | ||
f92d51d8 CY |
68 | /* Pattern used by call-process-region to make temp files. */ |
69 | static Lisp_Object Vtemp_file_name_pattern; | |
70 | ||
bb5f74ee PE |
71 | /* The next two variables are valid only while record-unwind-protect |
72 | is in place during call-process for a synchronous subprocess. At | |
73 | other times, their contents are irrelevant. Doing this via static | |
74 | C variables is more convenient than putting them into the arguments | |
75 | of record-unwind-protect, as they need to be updated at randomish | |
76 | times in the code, and Lisp cannot always store these values as | |
77 | Emacs integers. It's safe to use static variables here, as the | |
78 | code is never invoked reentrantly. */ | |
79 | ||
80 | /* If nonzero, a process-ID that has not been reaped. */ | |
81 | static pid_t synch_process_pid; | |
82 | ||
83 | /* If nonnegative, a file descriptor that has not been closed. */ | |
84 | static int synch_process_fd; | |
85 | \f | |
86 | /* Block SIGCHLD. */ | |
80856e74 | 87 | |
c7041908 | 88 | void |
bb5f74ee PE |
89 | block_child_signal (void) |
90 | { | |
bb5f74ee PE |
91 | sigset_t blocked; |
92 | sigemptyset (&blocked); | |
93 | sigaddset (&blocked, SIGCHLD); | |
94 | pthread_sigmask (SIG_BLOCK, &blocked, 0); | |
bb5f74ee | 95 | } |
6b61353c | 96 | |
bb5f74ee | 97 | /* Unblock SIGCHLD. */ |
f105f403 | 98 | |
c7041908 | 99 | void |
bb5f74ee PE |
100 | unblock_child_signal (void) |
101 | { | |
bb5f74ee | 102 | pthread_sigmask (SIG_SETMASK, &empty_mask, 0); |
bb5f74ee | 103 | } |
37d54121 | 104 | |
35fb8050 PE |
105 | /* If P is reapable, record it as a deleted process and kill it. |
106 | Do this in a critical section. Unless PID is wedged it will be | |
107 | reaped on receipt of the first SIGCHLD after the critical section. */ | |
108 | ||
109 | void | |
110 | record_kill_process (struct Lisp_Process *p) | |
111 | { | |
112 | block_child_signal (); | |
113 | ||
114 | if (p->alive) | |
115 | { | |
116 | p->alive = 0; | |
117 | record_deleted_pid (p->pid); | |
d983a10b | 118 | kill (- p->pid, SIGKILL); |
35fb8050 PE |
119 | } |
120 | ||
121 | unblock_child_signal (); | |
122 | } | |
123 | ||
bb5f74ee | 124 | /* Clean up when exiting call_process_cleanup. */ |
37d54121 | 125 | |
d177f194 | 126 | static Lisp_Object |
bb5f74ee | 127 | call_process_kill (Lisp_Object ignored) |
d177f194 | 128 | { |
908589fd | 129 | if (synch_process_fd >= 0) |
bb5f74ee PE |
130 | emacs_close (synch_process_fd); |
131 | ||
bb5f74ee PE |
132 | if (synch_process_pid) |
133 | { | |
35fb8050 PE |
134 | struct Lisp_Process proc; |
135 | proc.alive = 1; | |
136 | proc.pid = synch_process_pid; | |
137 | record_kill_process (&proc); | |
bb5f74ee PE |
138 | } |
139 | ||
d177f194 JB |
140 | return Qnil; |
141 | } | |
142 | ||
bb5f74ee PE |
143 | /* Clean up when exiting Fcall_process. |
144 | On MSDOS, delete the temporary file on any kind of termination. | |
145 | On Unix, kill the process and any children on termination by signal. */ | |
146 | ||
7710357c | 147 | static Lisp_Object |
971de7fb | 148 | call_process_cleanup (Lisp_Object arg) |
80856e74 | 149 | { |
bb5f74ee PE |
150 | #ifdef MSDOS |
151 | Lisp_Object buffer = Fcar (arg); | |
152 | Lisp_Object file = Fcdr (arg); | |
ad3aaf33 | 153 | #else |
bb5f74ee | 154 | Lisp_Object buffer = arg; |
ad3aaf33 AS |
155 | #endif |
156 | ||
bb5f74ee | 157 | Fset_buffer (buffer); |
d177f194 | 158 | |
bb5f74ee PE |
159 | #ifndef MSDOS |
160 | /* If the process still exists, kill its process group. */ | |
161 | if (synch_process_pid) | |
d177f194 | 162 | { |
d311d28c | 163 | ptrdiff_t count = SPECPDL_INDEX (); |
d983a10b | 164 | kill (-synch_process_pid, SIGINT); |
bb5f74ee | 165 | record_unwind_protect (call_process_kill, make_number (0)); |
d177f194 JB |
166 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); |
167 | immediate_quit = 1; | |
168 | QUIT; | |
bb5f74ee PE |
169 | wait_for_termination (synch_process_pid, 0, 1); |
170 | synch_process_pid = 0; | |
d177f194 JB |
171 | immediate_quit = 0; |
172 | specpdl_ptr = specpdl + count; /* Discard the unwind protect. */ | |
173 | message1 ("Waiting for process to die...done"); | |
174 | } | |
bb5f74ee PE |
175 | #endif |
176 | ||
908589fd | 177 | if (synch_process_fd >= 0) |
bb5f74ee PE |
178 | emacs_close (synch_process_fd); |
179 | ||
180 | #ifdef MSDOS | |
181 | /* FILE is "" when we didn't actually create a temporary file in | |
182 | call-process. */ | |
183 | if (!(strcmp (SDATA (file), NULL_DEVICE) == 0 || SREF (file, 0) == '\0')) | |
184 | unlink (SDATA (file)); | |
185 | #endif | |
186 | ||
80856e74 JB |
187 | return Qnil; |
188 | } | |
189 | ||
406af475 PE |
190 | #ifdef DOS_NT |
191 | static mode_t const default_output_mode = S_IREAD | S_IWRITE; | |
192 | #else | |
193 | static mode_t const default_output_mode = 0666; | |
194 | #endif | |
195 | ||
a7ca3326 | 196 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, |
fdb82f93 PJ |
197 | doc: /* Call PROGRAM synchronously in separate process. |
198 | The remaining arguments are optional. | |
199 | The program's input comes from file INFILE (nil means `/dev/null'). | |
38cd43eb | 200 | Insert output in DESTINATION before point; t means current buffer; nil for DESTINATION |
1ef14cb4 | 201 | means discard it; 0 means discard and don't wait; and `(:file FILE)', where |
1b9f60cc GM |
202 | FILE is a file name string, means that it should be written to that file |
203 | \(if the file already exists it is overwritten). | |
38cd43eb | 204 | DESTINATION can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
fdb82f93 PJ |
205 | REAL-BUFFER says what to do with standard output, as above, |
206 | while STDERR-FILE says what to do with standard error in the child. | |
207 | STDERR-FILE may be nil (discard standard error output), | |
208 | t (mix it with ordinary output), or a file name string. | |
209 | ||
210 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
211 | Remaining arguments are strings passed as command arguments to PROGRAM. | |
212 | ||
a4feb144 RS |
213 | If executable PROGRAM can't be found as an executable, `call-process' |
214 | signals a Lisp error. `call-process' reports errors in execution of | |
215 | the program only through its return and output. | |
216 | ||
38cd43eb | 217 | If DESTINATION is 0, `call-process' returns immediately with value nil. |
fdb82f93 PJ |
218 | Otherwise it waits for PROGRAM to terminate |
219 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
220 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
221 | ||
38cd43eb | 222 | usage: (call-process PROGRAM &optional INFILE DESTINATION DISPLAY &rest ARGS) */) |
f66c7cf8 | 223 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 224 | { |
bb5f74ee | 225 | Lisp_Object infile, buffer, current_dir, path; |
2f221583 | 226 | bool display_p; |
60aeceb8 | 227 | int fd0, fd1, filefd; |
bb5f74ee | 228 | int status; |
d311d28c PE |
229 | ptrdiff_t count = SPECPDL_INDEX (); |
230 | USE_SAFE_ALLOCA; | |
2d607244 | 231 | |
60aeceb8 | 232 | char **new_argv; |
39eaa782 RS |
233 | /* File to use for stderr in the child. |
234 | t means use same as standard output. */ | |
235 | Lisp_Object error_file; | |
1ef14cb4 | 236 | Lisp_Object output_file = Qnil; |
7e6c2178 | 237 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
888c9e86 | 238 | char *outf, *tempfile = NULL; |
7e6c2178 | 239 | int outfilefd; |
d311d28c PE |
240 | int pid; |
241 | #else | |
242 | pid_t pid; | |
80856e74 | 243 | #endif |
bb5f74ee | 244 | int child_errno; |
1ef14cb4 | 245 | int fd_output = -1; |
32d08644 KH |
246 | struct coding_system process_coding; /* coding-system of process output */ |
247 | struct coding_system argument_coding; /* coding-system of arguments */ | |
09494912 RS |
248 | /* Set to the return value of Ffind_operation_coding_system. */ |
249 | Lisp_Object coding_systems; | |
2f221583 | 250 | bool output_to_buffer = 1; |
09494912 RS |
251 | |
252 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ | |
253 | coding_systems = Qt; | |
32d08644 | 254 | |
b7826503 | 255 | CHECK_STRING (args[0]); |
80856e74 | 256 | |
39eaa782 RS |
257 | error_file = Qt; |
258 | ||
7e6c2178 RS |
259 | #ifndef subprocesses |
260 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
177c0ea7 | 261 | if (nargs >= 3 |
09ffb8b5 | 262 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
263 | error ("Operating system cannot handle asynchronous subprocesses"); |
264 | #endif /* subprocesses */ | |
265 | ||
09494912 | 266 | /* Decide the coding-system for giving arguments. */ |
32d08644 KH |
267 | { |
268 | Lisp_Object val, *args2; | |
f66c7cf8 | 269 | ptrdiff_t i; |
32d08644 KH |
270 | |
271 | /* If arguments are supplied, we may have to encode them. */ | |
272 | if (nargs >= 5) | |
273 | { | |
2f221583 | 274 | bool must_encode = 0; |
6e50da0a | 275 | Lisp_Object coding_attrs; |
30d57b8e | 276 | |
e7c1c20e | 277 | for (i = 4; i < nargs; i++) |
b7826503 | 278 | CHECK_STRING (args[i]); |
e7c1c20e | 279 | |
a2286b5c | 280 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
281 | if (STRING_MULTIBYTE (args[i])) |
282 | must_encode = 1; | |
283 | ||
beacaab3 KH |
284 | if (!NILP (Vcoding_system_for_write)) |
285 | val = Vcoding_system_for_write; | |
30d57b8e | 286 | else if (! must_encode) |
fcaf8878 | 287 | val = Qraw_text; |
beacaab3 | 288 | else |
32d08644 | 289 | { |
0065d054 | 290 | SAFE_NALLOCA (args2, 1, nargs + 1); |
32d08644 KH |
291 | args2[0] = Qcall_process; |
292 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 293 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 294 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
32d08644 | 295 | } |
fcaf8878 | 296 | val = complement_process_encoding_system (val); |
32d08644 | 297 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); |
6e50da0a KH |
298 | coding_attrs = CODING_ID_ATTRS (argument_coding.id); |
299 | if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs))) | |
300 | { | |
301 | /* We should not use an ASCII incompatible coding system. */ | |
302 | val = raw_text_coding_system (val); | |
303 | setup_coding_system (val, &argument_coding); | |
304 | } | |
32d08644 | 305 | } |
32d08644 KH |
306 | } |
307 | ||
e576cab4 JB |
308 | if (nargs >= 2 && ! NILP (args[1])) |
309 | { | |
4b4deea2 | 310 | infile = Fexpand_file_name (args[1], BVAR (current_buffer, directory)); |
b7826503 | 311 | CHECK_STRING (infile); |
e576cab4 | 312 | } |
80856e74 | 313 | else |
5437e9f9 | 314 | infile = build_string (NULL_DEVICE); |
80856e74 | 315 | |
e576cab4 JB |
316 | if (nargs >= 3) |
317 | { | |
39eaa782 RS |
318 | buffer = args[2]; |
319 | ||
1ef14cb4 LMI |
320 | /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT |
321 | FILE-FOR-STDERR), unless the first element is :file, in which case see | |
322 | the next paragraph. */ | |
19ed11ba AS |
323 | if (CONSP (buffer) |
324 | && (! SYMBOLP (XCAR (buffer)) | |
325 | || strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file"))) | |
39eaa782 | 326 | { |
70949dac | 327 | if (CONSP (XCDR (buffer))) |
45be8a1e | 328 | { |
a9d4f28a | 329 | Lisp_Object stderr_file; |
70949dac | 330 | stderr_file = XCAR (XCDR (buffer)); |
45be8a1e RS |
331 | |
332 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
333 | error_file = stderr_file; | |
334 | else | |
335 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
336 | } | |
337 | ||
70949dac | 338 | buffer = XCAR (buffer); |
39eaa782 | 339 | } |
044512ed | 340 | |
1ef14cb4 | 341 | /* If the buffer is (still) a list, it might be a (:file "file") spec. */ |
19ed11ba AS |
342 | if (CONSP (buffer) |
343 | && SYMBOLP (XCAR (buffer)) | |
344 | && ! strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file")) | |
1ef14cb4 LMI |
345 | { |
346 | output_file = Fexpand_file_name (XCAR (XCDR (buffer)), | |
347 | BVAR (current_buffer, directory)); | |
348 | CHECK_STRING (output_file); | |
349 | buffer = Qnil; | |
350 | } | |
351 | ||
39eaa782 RS |
352 | if (!(EQ (buffer, Qnil) |
353 | || EQ (buffer, Qt) | |
3ffde7d6 | 354 | || INTEGERP (buffer))) |
e576cab4 | 355 | { |
39eaa782 RS |
356 | Lisp_Object spec_buffer; |
357 | spec_buffer = buffer; | |
50fe359b | 358 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
359 | /* Mention the buffer name for a better error message. */ |
360 | if (NILP (buffer)) | |
b7826503 PJ |
361 | CHECK_BUFFER (spec_buffer); |
362 | CHECK_BUFFER (buffer); | |
e576cab4 JB |
363 | } |
364 | } | |
177c0ea7 | 365 | else |
e576cab4 | 366 | buffer = Qnil; |
80856e74 | 367 | |
58616e67 JB |
368 | /* Make sure that the child will be able to chdir to the current |
369 | buffer's current directory, or its unhandled equivalent. We | |
370 | can't just have the child check for an error when it does the | |
371 | chdir, since it's in a vfork. | |
372 | ||
373 | We have to GCPRO around this because Fexpand_file_name, | |
374 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
375 | might call a file name handling function. The argument list is | |
376 | protected by the caller, so all we really have to worry about is | |
377 | buffer. */ | |
378 | { | |
1ef14cb4 | 379 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
58616e67 | 380 | |
4b4deea2 | 381 | current_dir = BVAR (current_buffer, directory); |
58616e67 | 382 | |
1ef14cb4 | 383 | GCPRO5 (infile, buffer, current_dir, error_file, output_file); |
58616e67 | 384 | |
ca319910 SM |
385 | current_dir = Funhandled_file_name_directory (current_dir); |
386 | if (NILP (current_dir)) | |
387 | /* If the file name handler says that current_dir is unreachable, use | |
388 | a sensible default. */ | |
389 | current_dir = build_string ("~/"); | |
390 | current_dir = expand_and_dir_to_file (current_dir, Qnil); | |
db8454b0 CY |
391 | current_dir = Ffile_name_as_directory (current_dir); |
392 | ||
58616e67 JB |
393 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
394 | report_file_error ("Setting current directory", | |
4b4deea2 | 395 | Fcons (BVAR (current_buffer, directory), Qnil)); |
58616e67 | 396 | |
34b87689 KH |
397 | if (STRING_MULTIBYTE (infile)) |
398 | infile = ENCODE_FILE (infile); | |
399 | if (STRING_MULTIBYTE (current_dir)) | |
400 | current_dir = ENCODE_FILE (current_dir); | |
401 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) | |
402 | error_file = ENCODE_FILE (error_file); | |
1ef14cb4 LMI |
403 | if (STRINGP (output_file) && STRING_MULTIBYTE (output_file)) |
404 | output_file = ENCODE_FILE (output_file); | |
58616e67 JB |
405 | UNGCPRO; |
406 | } | |
407 | ||
d311d28c | 408 | display_p = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
80856e74 | 409 | |
42a5b22f | 410 | filefd = emacs_open (SSDATA (infile), O_RDONLY, 0); |
80856e74 | 411 | if (filefd < 0) |
b0728617 EZ |
412 | report_file_error ("Opening process input file", |
413 | Fcons (DECODE_FILE (infile), Qnil)); | |
1ef14cb4 LMI |
414 | |
415 | if (STRINGP (output_file)) | |
416 | { | |
1ef14cb4 | 417 | fd_output = emacs_open (SSDATA (output_file), |
406af475 PE |
418 | O_WRONLY | O_CREAT | O_TRUNC | O_TEXT, |
419 | default_output_mode); | |
1ef14cb4 LMI |
420 | if (fd_output < 0) |
421 | { | |
a773ed9a | 422 | int open_errno = errno; |
1ef14cb4 | 423 | output_file = DECODE_FILE (output_file); |
a773ed9a PE |
424 | report_file_errno ("Opening process output file", |
425 | Fcons (output_file, Qnil), open_errno); | |
19ed11ba | 426 | } |
1ef14cb4 | 427 | if (STRINGP (error_file) || NILP (error_file)) |
19ed11ba | 428 | output_to_buffer = 0; |
1ef14cb4 LMI |
429 | } |
430 | ||
80856e74 | 431 | /* Search for program; barf if not found. */ |
c52b0b34 | 432 | { |
ad3aaf33 | 433 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
a773ed9a | 434 | int ok; |
c52b0b34 | 435 | |
ad3aaf33 | 436 | GCPRO4 (infile, buffer, current_dir, error_file); |
a773ed9a | 437 | ok = openp (Vexec_path, args[0], Vexec_suffixes, &path, make_number (X_OK)); |
c52b0b34 | 438 | UNGCPRO; |
a773ed9a PE |
439 | if (ok < 0) |
440 | { | |
441 | int openp_errno = errno; | |
442 | emacs_close (filefd); | |
443 | report_file_errno ("Searching for program", | |
444 | Fcons (args[0], Qnil), openp_errno); | |
445 | } | |
c52b0b34 | 446 | } |
8ee8f447 RS |
447 | |
448 | /* If program file name starts with /: for quoting a magic name, | |
449 | discard that. */ | |
450 | if (SBYTES (path) > 2 && SREF (path, 0) == '/' | |
451 | && SREF (path, 1) == ':') | |
452 | path = Fsubstring (path, make_number (2), Qnil); | |
453 | ||
98c6f1e3 | 454 | new_argv = SAFE_ALLOCA ((nargs > 4 ? nargs - 2 : 2) * sizeof *new_argv); |
c364e618 | 455 | |
e7c3fb06 EZ |
456 | { |
457 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; | |
458 | ||
459 | GCPRO5 (infile, buffer, current_dir, path, error_file); | |
460 | if (nargs > 4) | |
461 | { | |
462 | ptrdiff_t i; | |
463 | ||
464 | argument_coding.dst_multibyte = 0; | |
465 | for (i = 4; i < nargs; i++) | |
466 | { | |
467 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); | |
468 | if (CODING_REQUIRE_ENCODING (&argument_coding)) | |
469 | /* We must encode this argument. */ | |
470 | args[i] = encode_coding_string (&argument_coding, args[i], 1); | |
471 | } | |
472 | for (i = 4; i < nargs; i++) | |
94fbc901 | 473 | new_argv[i - 3] = SSDATA (args[i]); |
e7c3fb06 EZ |
474 | new_argv[i - 3] = 0; |
475 | } | |
476 | else | |
477 | new_argv[1] = 0; | |
478 | if (STRING_MULTIBYTE (path)) | |
479 | path = ENCODE_FILE (path); | |
94fbc901 | 480 | new_argv[0] = SSDATA (path); |
e7c3fb06 EZ |
481 | UNGCPRO; |
482 | } | |
80856e74 | 483 | |
7e6c2178 | 484 | #ifdef MSDOS /* MW, July 1993 */ |
7e6c2178 | 485 | |
888c9e86 EZ |
486 | /* If we're redirecting STDOUT to a file, that file is already open |
487 | on fd_output. */ | |
1ef14cb4 | 488 | if (fd_output < 0) |
7e6c2178 | 489 | { |
888c9e86 EZ |
490 | if ((outf = egetenv ("TMPDIR"))) |
491 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); | |
492 | else | |
493 | { | |
494 | tempfile = alloca (20); | |
495 | *tempfile = '\0'; | |
496 | } | |
e7ac588e | 497 | dostounix_filename (tempfile, 0); |
888c9e86 EZ |
498 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') |
499 | strcat (tempfile, "/"); | |
500 | strcat (tempfile, "detmp.XXX"); | |
501 | mktemp (tempfile); | |
406af475 PE |
502 | outfilefd = emacs_open (tempfile, O_WRONLY | O_CREAT | O_TRUNC, |
503 | S_IREAD | S_IWRITE); | |
a773ed9a PE |
504 | if (outfilefd < 0) |
505 | { | |
506 | int open_errno = errno; | |
507 | emacs_close (filefd); | |
508 | report_file_errno ("Opening process output file", | |
509 | Fcons (build_string (tempfile), Qnil), open_errno); | |
510 | } | |
7e6c2178 | 511 | } |
1ef14cb4 LMI |
512 | else |
513 | outfilefd = fd_output; | |
60aeceb8 PE |
514 | fd0 = filefd; |
515 | fd1 = outfilefd; | |
6f89d28a | 516 | #endif /* MSDOS */ |
7e6c2178 | 517 | |
d50d3dc8 | 518 | if (INTEGERP (buffer)) |
60aeceb8 PE |
519 | { |
520 | fd0 = -1; | |
521 | fd1 = emacs_open (NULL_DEVICE, O_WRONLY, 0); | |
522 | } | |
80856e74 JB |
523 | else |
524 | { | |
7e6c2178 | 525 | #ifndef MSDOS |
60aeceb8 | 526 | int fd[2]; |
067428c1 | 527 | if (pipe2 (fd, O_CLOEXEC) != 0) |
db92b288 | 528 | { |
60aeceb8 | 529 | int pipe_errno = errno; |
db92b288 | 530 | emacs_close (filefd); |
a773ed9a | 531 | report_file_errno ("Creating process pipe", Qnil, pipe_errno); |
db92b288 | 532 | } |
60aeceb8 PE |
533 | fd0 = fd[0]; |
534 | fd1 = fd[1]; | |
80856e74 JB |
535 | #endif |
536 | } | |
537 | ||
538 | { | |
39eaa782 | 539 | int fd_error = fd1; |
80856e74 | 540 | |
1ef14cb4 LMI |
541 | if (fd_output >= 0) |
542 | fd1 = fd_output; | |
80856e74 | 543 | |
39eaa782 | 544 | if (NILP (error_file)) |
68c45bf0 | 545 | fd_error = emacs_open (NULL_DEVICE, O_WRONLY, 0); |
39eaa782 | 546 | else if (STRINGP (error_file)) |
406af475 PE |
547 | fd_error = emacs_open (SSDATA (error_file), |
548 | O_WRONLY | O_CREAT | O_TRUNC | O_TEXT, | |
549 | default_output_mode); | |
39eaa782 RS |
550 | |
551 | if (fd_error < 0) | |
552 | { | |
a773ed9a | 553 | int open_errno = errno; |
68c45bf0 | 554 | emacs_close (filefd); |
60aeceb8 PE |
555 | if (fd0 != filefd) |
556 | emacs_close (fd0); | |
39eaa782 | 557 | if (fd1 >= 0) |
68c45bf0 | 558 | emacs_close (fd1); |
6f89d28a MB |
559 | #ifdef MSDOS |
560 | unlink (tempfile); | |
561 | #endif | |
34b87689 KH |
562 | if (NILP (error_file)) |
563 | error_file = build_string (NULL_DEVICE); | |
564 | else if (STRINGP (error_file)) | |
565 | error_file = DECODE_FILE (error_file); | |
a773ed9a PE |
566 | report_file_errno ("Cannot redirect stderr", |
567 | Fcons (error_file, Qnil), open_errno); | |
39eaa782 | 568 | } |
89e1ec1d | 569 | |
2610078a | 570 | #ifdef MSDOS /* MW, July 1993 */ |
c17c4250 | 571 | /* Note that on MSDOS `child_setup' actually returns the child process |
bb5f74ee | 572 | exit status, not its PID, so assign it to status below. */ |
60aeceb8 | 573 | pid = child_setup (filefd, outfilefd, fd_error, new_argv, 0, current_dir); |
bb5f74ee | 574 | child_errno = errno; |
2610078a | 575 | |
68c45bf0 | 576 | emacs_close (outfilefd); |
2610078a | 577 | if (fd_error != outfilefd) |
68c45bf0 | 578 | emacs_close (fd_error); |
bb5f74ee PE |
579 | if (pid < 0) |
580 | { | |
581 | synchronize_system_messages_locale (); | |
582 | return | |
583 | code_convert_string_norecord (build_string (strerror (child_errno)), | |
584 | Vlocale_coding_system, 0); | |
585 | } | |
586 | status = pid; | |
2610078a | 587 | fd1 = -1; /* No harm in closing that one! */ |
888c9e86 | 588 | if (tempfile) |
2610078a | 589 | { |
888c9e86 EZ |
590 | /* Since CRLF is converted to LF within `decode_coding', we |
591 | can always open a file with binary mode. */ | |
60aeceb8 PE |
592 | fd0 = emacs_open (tempfile, O_RDONLY | O_BINARY, 0); |
593 | if (fd0 < 0) | |
888c9e86 | 594 | { |
a773ed9a | 595 | int open_errno = errno; |
888c9e86 EZ |
596 | unlink (tempfile); |
597 | emacs_close (filefd); | |
a773ed9a PE |
598 | report_file_errno ("Cannot re-open temporary file", |
599 | Fcons (build_string (tempfile), Qnil), | |
600 | open_errno); | |
888c9e86 | 601 | } |
2610078a | 602 | } |
888c9e86 | 603 | else |
60aeceb8 | 604 | fd0 = -1; /* We are not going to read from tempfile. */ |
644d3f0d | 605 | #endif /* MSDOS */ |
bb5f74ee PE |
606 | |
607 | /* Do the unwind-protect now, even though the pid is not known, so | |
608 | that no storage allocation is done in the critical section. | |
609 | The actual PID will be filled in during the critical section. */ | |
610 | synch_process_pid = 0; | |
611 | synch_process_fd = fd0; | |
644d3f0d PE |
612 | |
613 | #ifdef MSDOS | |
614 | /* MSDOS needs different cleanup information. */ | |
615 | record_unwind_protect (call_process_cleanup, | |
616 | Fcons (Fcurrent_buffer (), | |
617 | build_string (tempfile ? tempfile : ""))); | |
618 | #else | |
bb5f74ee PE |
619 | record_unwind_protect (call_process_cleanup, Fcurrent_buffer ()); |
620 | ||
621 | block_input (); | |
622 | block_child_signal (); | |
623 | ||
bad95d8f | 624 | #ifdef WINDOWSNT |
60aeceb8 | 625 | pid = child_setup (filefd, fd1, fd_error, new_argv, 0, current_dir); |
b0728617 EZ |
626 | /* We need to record the input file of this child, for when we are |
627 | called from call-process-region to create an async subprocess. | |
628 | That's because call-process-region's unwind procedure will | |
629 | attempt to delete the temporary input file, which will fail | |
630 | because that file is still in use. Recording it with the child | |
631 | will allow us to delete the file when the subprocess exits. | |
632 | The second part of this is in delete_temp_file, q.v. */ | |
633 | if (pid > 0 && INTEGERP (buffer) && nargs >= 2 && !NILP (args[1])) | |
634 | record_infile (pid, xstrdup (SSDATA (infile))); | |
bad95d8f | 635 | #else /* not WINDOWSNT */ |
c0ad4ea5 | 636 | |
db6c0e74 | 637 | /* vfork, and prevent local vars from being clobbered by the vfork. */ |
b08a63cc | 638 | { |
c74e9d86 PE |
639 | Lisp_Object volatile buffer_volatile = buffer; |
640 | Lisp_Object volatile coding_systems_volatile = coding_systems; | |
641 | Lisp_Object volatile current_dir_volatile = current_dir; | |
2f221583 PE |
642 | bool volatile display_p_volatile = display_p; |
643 | bool volatile output_to_buffer_volatile = output_to_buffer; | |
644 | bool volatile sa_must_free_volatile = sa_must_free; | |
5266b4bb | 645 | int volatile fd1_volatile = fd1; |
db6c0e74 PE |
646 | int volatile fd_error_volatile = fd_error; |
647 | int volatile fd_output_volatile = fd_output; | |
60aeceb8 PE |
648 | int volatile filefd_volatile = filefd; |
649 | ptrdiff_t volatile count_volatile = count; | |
d311d28c | 650 | ptrdiff_t volatile sa_count_volatile = sa_count; |
60aeceb8 | 651 | char **volatile new_argv_volatile = new_argv; |
80856e74 | 652 | |
db6c0e74 | 653 | pid = vfork (); |
bb5f74ee | 654 | child_errno = errno; |
80856e74 | 655 | |
c74e9d86 PE |
656 | buffer = buffer_volatile; |
657 | coding_systems = coding_systems_volatile; | |
658 | current_dir = current_dir_volatile; | |
d311d28c | 659 | display_p = display_p_volatile; |
60aeceb8 PE |
660 | output_to_buffer = output_to_buffer_volatile; |
661 | sa_must_free = sa_must_free_volatile; | |
5266b4bb | 662 | fd1 = fd1_volatile; |
db6c0e74 PE |
663 | fd_error = fd_error_volatile; |
664 | fd_output = fd_output_volatile; | |
60aeceb8 PE |
665 | filefd = filefd_volatile; |
666 | count = count_volatile; | |
d311d28c | 667 | sa_count = sa_count_volatile; |
db6c0e74 | 668 | new_argv = new_argv_volatile; |
644d3f0d PE |
669 | |
670 | fd0 = synch_process_fd; | |
db6c0e74 | 671 | } |
b9c7f648 | 672 | |
80856e74 JB |
673 | if (pid == 0) |
674 | { | |
bb5f74ee PE |
675 | unblock_child_signal (); |
676 | ||
60aeceb8 PE |
677 | if (fd0 >= 0) |
678 | emacs_close (fd0); | |
322aea6d | 679 | |
19ed11ba | 680 | setsid (); |
c0ad4ea5 | 681 | |
4d7e6e51 | 682 | /* Emacs ignores SIGPIPE, but the child should not. */ |
2f9b9adb | 683 | signal (SIGPIPE, SIG_DFL); |
c0ad4ea5 | 684 | |
60aeceb8 | 685 | child_setup (filefd, fd1, fd_error, new_argv, 0, current_dir); |
80856e74 | 686 | } |
aba637ec | 687 | |
bad95d8f | 688 | #endif /* not WINDOWSNT */ |
cd5f8f60 | 689 | |
bb5f74ee PE |
690 | child_errno = errno; |
691 | ||
908589fd | 692 | if (pid > 0) |
bb5f74ee PE |
693 | { |
694 | if (INTEGERP (buffer)) | |
695 | record_deleted_pid (pid); | |
696 | else | |
697 | synch_process_pid = pid; | |
698 | } | |
699 | ||
700 | unblock_child_signal (); | |
701 | unblock_input (); | |
702 | ||
cd5f8f60 RS |
703 | /* The MSDOS case did this already. */ |
704 | if (fd_error >= 0) | |
68c45bf0 | 705 | emacs_close (fd_error); |
2610078a | 706 | #endif /* not MSDOS */ |
80856e74 | 707 | |
60aeceb8 | 708 | /* Close most of our file descriptors, but not fd0 |
6b6e798b | 709 | since we will use that to read input from. */ |
68c45bf0 | 710 | emacs_close (filefd); |
1ef14cb4 LMI |
711 | if (fd_output >= 0) |
712 | emacs_close (fd_output); | |
799abb26 | 713 | if (fd1 >= 0 && fd1 != fd_error) |
68c45bf0 | 714 | emacs_close (fd1); |
80856e74 JB |
715 | } |
716 | ||
717 | if (pid < 0) | |
a773ed9a | 718 | report_file_errno ("Doing vfork", Qnil, child_errno); |
80856e74 | 719 | |
d50d3dc8 | 720 | if (INTEGERP (buffer)) |
644d3f0d | 721 | return unbind_to (count, Qnil); |
80856e74 | 722 | |
d50d3dc8 | 723 | if (BUFFERP (buffer)) |
80856e74 JB |
724 | Fset_buffer (buffer); |
725 | ||
09494912 RS |
726 | if (NILP (buffer)) |
727 | { | |
728 | /* If BUFFER is nil, we must read process output once and then | |
729 | discard it, so setup coding system but with nil. */ | |
730 | setup_coding_system (Qnil, &process_coding); | |
659afede | 731 | process_coding.dst_multibyte = 0; |
09494912 RS |
732 | } |
733 | else | |
734 | { | |
735 | Lisp_Object val, *args2; | |
736 | ||
737 | val = Qnil; | |
738 | if (!NILP (Vcoding_system_for_read)) | |
739 | val = Vcoding_system_for_read; | |
740 | else | |
741 | { | |
742 | if (EQ (coding_systems, Qt)) | |
743 | { | |
f66c7cf8 | 744 | ptrdiff_t i; |
09494912 | 745 | |
0065d054 | 746 | SAFE_NALLOCA (args2, 1, nargs + 1); |
09494912 RS |
747 | args2[0] = Qcall_process; |
748 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
749 | coding_systems | |
750 | = Ffind_operation_coding_system (nargs + 1, args2); | |
751 | } | |
752 | if (CONSP (coding_systems)) | |
70949dac | 753 | val = XCAR (coding_systems); |
09494912 | 754 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 755 | val = XCAR (Vdefault_process_coding_system); |
09494912 RS |
756 | else |
757 | val = Qnil; | |
758 | } | |
91183bfd | 759 | Fcheck_coding_system (val); |
09494912 RS |
760 | /* In unibyte mode, character code conversion should not take |
761 | place but EOL conversion should. So, setup raw-text or one | |
762 | of the subsidiary according to the information just setup. */ | |
4b4deea2 | 763 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
09494912 | 764 | && !NILP (val)) |
91183bfd KH |
765 | val = raw_text_coding_system (val); |
766 | setup_coding_system (val, &process_coding); | |
659afede KH |
767 | process_coding.dst_multibyte |
768 | = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); | |
09494912 | 769 | } |
a0241d01 | 770 | process_coding.src_multibyte = 0; |
09494912 | 771 | |
80856e74 JB |
772 | immediate_quit = 1; |
773 | QUIT; | |
774 | ||
1ef14cb4 | 775 | if (output_to_buffer) |
19ed11ba | 776 | { |
60aeceb8 PE |
777 | enum { CALLPROC_BUFFER_SIZE_MIN = 16 * 1024 }; |
778 | enum { CALLPROC_BUFFER_SIZE_MAX = 4 * CALLPROC_BUFFER_SIZE_MIN }; | |
779 | char buf[CALLPROC_BUFFER_SIZE_MAX]; | |
780 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; | |
2f221583 PE |
781 | int nread; |
782 | bool first = 1; | |
19ed11ba AS |
783 | EMACS_INT total_read = 0; |
784 | int carryover = 0; | |
2f221583 | 785 | bool display_on_the_fly = display_p; |
19ed11ba AS |
786 | struct coding_system saved_coding; |
787 | ||
788 | saved_coding = process_coding; | |
789 | while (1) | |
790 | { | |
791 | /* Repeatedly read until we've filled as much as possible | |
792 | of the buffer size we have. But don't read | |
793 | less than 1024--save that for the next bufferful. */ | |
794 | nread = carryover; | |
795 | while (nread < bufsize - 1024) | |
796 | { | |
60aeceb8 | 797 | int this_read = emacs_read (fd0, buf + nread, |
19ed11ba | 798 | bufsize - nread); |
60558b19 | 799 | |
19ed11ba AS |
800 | if (this_read < 0) |
801 | goto give_up; | |
60558b19 | 802 | |
19ed11ba AS |
803 | if (this_read == 0) |
804 | { | |
805 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
806 | break; | |
807 | } | |
60558b19 | 808 | |
19ed11ba AS |
809 | nread += this_read; |
810 | total_read += this_read; | |
60558b19 | 811 | |
19ed11ba AS |
812 | if (display_on_the_fly) |
813 | break; | |
814 | } | |
60558b19 | 815 | |
19ed11ba AS |
816 | /* Now NREAD is the total amount of data in the buffer. */ |
817 | immediate_quit = 0; | |
177c0ea7 | 818 | |
19ed11ba AS |
819 | if (!NILP (buffer)) |
820 | { | |
821 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) | |
822 | && ! CODING_MAY_REQUIRE_DECODING (&process_coding)) | |
823 | insert_1_both (buf, nread, nread, 0, 1, 0); | |
824 | else | |
825 | { /* We have to decode the input. */ | |
826 | Lisp_Object curbuf; | |
d311d28c | 827 | ptrdiff_t count1 = SPECPDL_INDEX (); |
19ed11ba AS |
828 | |
829 | XSETBUFFER (curbuf, current_buffer); | |
830 | /* We cannot allow after-change-functions be run | |
831 | during decoding, because that might modify the | |
832 | buffer, while we rely on process_coding.produced to | |
833 | faithfully reflect inserted text until we | |
834 | TEMP_SET_PT_BOTH below. */ | |
835 | specbind (Qinhibit_modification_hooks, Qt); | |
836 | decode_coding_c_string (&process_coding, | |
837 | (unsigned char *) buf, nread, curbuf); | |
838 | unbind_to (count1, Qnil); | |
839 | if (display_on_the_fly | |
840 | && CODING_REQUIRE_DETECTION (&saved_coding) | |
841 | && ! CODING_REQUIRE_DETECTION (&process_coding)) | |
842 | { | |
843 | /* We have detected some coding system. But, | |
844 | there's a possibility that the detection was | |
845 | done by insufficient data. So, we give up | |
846 | displaying on the fly. */ | |
847 | if (process_coding.produced > 0) | |
848 | del_range_2 (process_coding.dst_pos, | |
849 | process_coding.dst_pos_byte, | |
850 | process_coding.dst_pos | |
851 | + process_coding.produced_char, | |
852 | process_coding.dst_pos_byte | |
853 | + process_coding.produced, 0); | |
854 | display_on_the_fly = 0; | |
855 | process_coding = saved_coding; | |
856 | carryover = nread; | |
857 | /* This is to make the above condition always | |
858 | fails in the future. */ | |
859 | saved_coding.common_flags | |
860 | &= ~CODING_REQUIRE_DETECTION_MASK; | |
861 | continue; | |
862 | } | |
863 | ||
864 | TEMP_SET_PT_BOTH (PT + process_coding.produced_char, | |
865 | PT_BYTE + process_coding.produced); | |
866 | carryover = process_coding.carryover_bytes; | |
867 | if (carryover > 0) | |
868 | memcpy (buf, process_coding.carryover, | |
869 | process_coding.carryover_bytes); | |
870 | } | |
871 | } | |
c5bfa12b | 872 | |
19ed11ba AS |
873 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
874 | break; | |
6e3bfbb2 | 875 | |
19ed11ba AS |
876 | /* Make the buffer bigger as we continue to read more data, |
877 | but not past CALLPROC_BUFFER_SIZE_MAX. */ | |
878 | if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) | |
879 | if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) | |
880 | bufsize = CALLPROC_BUFFER_SIZE_MAX; | |
6e3bfbb2 | 881 | |
19ed11ba AS |
882 | if (display_p) |
883 | { | |
884 | if (first) | |
885 | prepare_menu_bars (); | |
886 | first = 0; | |
887 | redisplay_preserve_echo_area (1); | |
888 | /* This variable might have been set to 0 for code | |
889 | detection. In that case, we set it back to 1 because | |
890 | we should have already detected a coding system. */ | |
891 | display_on_the_fly = 1; | |
892 | } | |
893 | immediate_quit = 1; | |
894 | QUIT; | |
895 | } | |
896 | give_up: ; | |
897 | ||
898 | Vlast_coding_system_used = CODING_ID_NAME (process_coding.id); | |
899 | /* If the caller required, let the buffer inherit the | |
900 | coding-system used to decode the process output. */ | |
901 | if (inherit_process_coding_system) | |
902 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
903 | make_number (total_read)); | |
904 | } | |
3b440bb5 | 905 | |
77defa9a | 906 | #ifndef MSDOS |
80856e74 | 907 | /* Wait for it to terminate, unless it already has. */ |
bb5f74ee | 908 | wait_for_termination (pid, &status, !output_to_buffer); |
77defa9a | 909 | #endif |
80856e74 JB |
910 | |
911 | immediate_quit = 0; | |
912 | ||
37d54121 RS |
913 | /* Don't kill any children that the subprocess may have left behind |
914 | when exiting. */ | |
bb5f74ee | 915 | synch_process_pid = 0; |
37d54121 | 916 | |
3c59b4c9 | 917 | SAFE_FREE (); |
80856e74 JB |
918 | unbind_to (count, Qnil); |
919 | ||
bb5f74ee | 920 | if (WIFSIGNALED (status)) |
6b61353c | 921 | { |
42ca4633 | 922 | const char *signame; |
6b61353c KH |
923 | |
924 | synchronize_system_messages_locale (); | |
bb5f74ee | 925 | signame = strsignal (WTERMSIG (status)); |
6b61353c KH |
926 | |
927 | if (signame == 0) | |
19ed11ba | 928 | signame = "unknown"; |
6b61353c | 929 | |
bb5f74ee PE |
930 | return code_convert_string_norecord (build_string (signame), |
931 | Vlocale_coding_system, 0); | |
6b61353c KH |
932 | } |
933 | ||
bb5f74ee PE |
934 | eassert (WIFEXITED (status)); |
935 | return make_number (WEXITSTATUS (status)); | |
80856e74 | 936 | } |
80856e74 | 937 | \f |
9fefd2ba | 938 | static Lisp_Object |
971de7fb | 939 | delete_temp_file (Lisp_Object name) |
80856e74 | 940 | { |
1a271e14 | 941 | /* Suppress jka-compr handling, etc. */ |
d311d28c | 942 | ptrdiff_t count = SPECPDL_INDEX (); |
1a271e14 | 943 | specbind (intern ("file-name-handler-alist"), Qnil); |
b0728617 EZ |
944 | #ifdef WINDOWSNT |
945 | /* If this is called when the subprocess didn't exit yet, the | |
946 | attempt to delete its input file will fail. In that case, we | |
947 | schedule the file for deletion when the subprocess exits. This | |
948 | is the 2nd part of handling this situation; see the call to | |
949 | record_infile in call-process above, for the first part. */ | |
950 | if (!internal_delete_file (name)) | |
951 | { | |
952 | Lisp_Object encoded_file = ENCODE_FILE (name); | |
953 | ||
954 | record_pending_deletion (SSDATA (encoded_file)); | |
955 | } | |
956 | #else | |
f1a5d776 | 957 | internal_delete_file (name); |
b0728617 | 958 | #endif |
1a271e14 | 959 | unbind_to (count, Qnil); |
320695d8 | 960 | return Qnil; |
80856e74 JB |
961 | } |
962 | ||
963 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
fdb82f93 PJ |
964 | 3, MANY, 0, |
965 | doc: /* Send text from START to END to a synchronous process running PROGRAM. | |
966 | The remaining arguments are optional. | |
967 | Delete the text if fourth arg DELETE is non-nil. | |
968 | ||
1ef14cb4 LMI |
969 | Insert output in BUFFER before point; t means current buffer; nil for |
970 | BUFFER means discard it; 0 means discard and don't wait; and `(:file | |
971 | FILE)', where FILE is a file name string, means that it should be | |
1b9f60cc | 972 | written to that file (if the file already exists it is overwritten). |
fdb82f93 PJ |
973 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
974 | REAL-BUFFER says what to do with standard output, as above, | |
975 | while STDERR-FILE says what to do with standard error in the child. | |
976 | STDERR-FILE may be nil (discard standard error output), | |
977 | t (mix it with ordinary output), or a file name string. | |
978 | ||
979 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
980 | Remaining args are passed to PROGRAM at startup as command args. | |
981 | ||
ba9a5174 | 982 | If BUFFER is 0, `call-process-region' returns immediately with value nil. |
fdb82f93 PJ |
983 | Otherwise it waits for PROGRAM to terminate |
984 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
985 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
986 | ||
987 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) | |
f66c7cf8 | 988 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 989 | { |
39323a7e KH |
990 | struct gcpro gcpro1; |
991 | Lisp_Object filename_string; | |
992 | register Lisp_Object start, end; | |
d311d28c | 993 | ptrdiff_t count = SPECPDL_INDEX (); |
08ee4e87 | 994 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
09494912 | 995 | Lisp_Object coding_systems; |
32d08644 | 996 | Lisp_Object val, *args2; |
f66c7cf8 | 997 | ptrdiff_t i; |
98c6f1e3 | 998 | Lisp_Object tmpdir; |
7e6c2178 | 999 | |
f92d51d8 CY |
1000 | if (STRINGP (Vtemporary_file_directory)) |
1001 | tmpdir = Vtemporary_file_directory; | |
7e6c2178 RS |
1002 | else |
1003 | { | |
83be8524 | 1004 | char *outf; |
f92d51d8 | 1005 | #ifndef DOS_NT |
83be8524 PE |
1006 | outf = getenv ("TMPDIR"); |
1007 | tmpdir = build_string (outf ? outf : "/tmp/"); | |
f92d51d8 | 1008 | #else /* DOS_NT */ |
f92d51d8 CY |
1009 | if ((outf = egetenv ("TMPDIR")) |
1010 | || (outf = egetenv ("TMP")) | |
1011 | || (outf = egetenv ("TEMP"))) | |
1012 | tmpdir = build_string (outf); | |
1013 | else | |
1014 | tmpdir = Ffile_name_as_directory (build_string ("c:/temp")); | |
0774fcf8 | 1015 | #endif |
f92d51d8 | 1016 | } |
7e6c2178 | 1017 | |
3c59b4c9 PE |
1018 | { |
1019 | USE_SAFE_ALLOCA; | |
98c6f1e3 | 1020 | Lisp_Object pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir); |
74ba1583 EZ |
1021 | Lisp_Object encoded_tem; |
1022 | char *tempfile; | |
1023 | ||
1024 | #ifdef WINDOWSNT | |
1025 | /* Cannot use the result of Fexpand_file_name, because it | |
1026 | downcases the XXXXXX part of the pattern, and mktemp then | |
1027 | doesn't recognize it. */ | |
1028 | if (!NILP (Vw32_downcase_file_names)) | |
1029 | { | |
1030 | Lisp_Object dirname = Ffile_name_directory (pattern); | |
1031 | ||
1032 | if (NILP (dirname)) | |
1033 | pattern = Vtemp_file_name_pattern; | |
1034 | else | |
1035 | pattern = concat2 (dirname, Vtemp_file_name_pattern); | |
1036 | } | |
1037 | #endif | |
1038 | ||
1039 | encoded_tem = ENCODE_FILE (pattern); | |
1040 | tempfile = SAFE_ALLOCA (SBYTES (encoded_tem) + 1); | |
7c2fcf9b | 1041 | memcpy (tempfile, SDATA (encoded_tem), SBYTES (encoded_tem) + 1); |
3c59b4c9 | 1042 | coding_systems = Qt; |
09494912 | 1043 | |
067428c1 | 1044 | #if defined HAVE_MKOSTEMP || defined HAVE_MKSTEMP |
3c59b4c9 | 1045 | { |
a773ed9a | 1046 | int fd, open_errno; |
3c59b4c9 | 1047 | |
4d7e6e51 | 1048 | block_input (); |
067428c1 PE |
1049 | # ifdef HAVE_MKOSTEMP |
1050 | fd = mkostemp (tempfile, O_CLOEXEC); | |
1051 | # else | |
3c59b4c9 | 1052 | fd = mkstemp (tempfile); |
067428c1 | 1053 | # endif |
a773ed9a | 1054 | open_errno = errno; |
4d7e6e51 | 1055 | unblock_input (); |
a773ed9a PE |
1056 | if (fd < 0) |
1057 | report_file_errno ("Failed to open temporary file", | |
1058 | Fcons (build_string (tempfile), Qnil), open_errno); | |
1059 | emacs_close (fd); | |
3c59b4c9 | 1060 | } |
1ddc85a4 | 1061 | #else |
a773ed9a | 1062 | errno = EEXIST; |
3c59b4c9 | 1063 | mktemp (tempfile); |
d3cefd13 | 1064 | if (!*tempfile) |
a773ed9a PE |
1065 | report_file_error ("Failed to open temporary file using pattern", |
1066 | Fcons (pattern, Qnil)); | |
1ddc85a4 | 1067 | #endif |
80856e74 | 1068 | |
3c59b4c9 PE |
1069 | filename_string = build_string (tempfile); |
1070 | GCPRO1 (filename_string); | |
1071 | SAFE_FREE (); | |
1072 | } | |
1073 | ||
80856e74 JB |
1074 | start = args[0]; |
1075 | end = args[1]; | |
32d08644 | 1076 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
1077 | if (!NILP (Vcoding_system_for_write)) |
1078 | val = Vcoding_system_for_write; | |
4b4deea2 | 1079 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
fcaf8878 | 1080 | val = Qraw_text; |
32d08644 | 1081 | else |
beacaab3 | 1082 | { |
3c59b4c9 | 1083 | USE_SAFE_ALLOCA; |
0065d054 | 1084 | SAFE_NALLOCA (args2, 1, nargs + 1); |
91489411 RS |
1085 | args2[0] = Qcall_process_region; |
1086 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1087 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); | |
fcaf8878 | 1088 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
3c59b4c9 | 1089 | SAFE_FREE (); |
beacaab3 | 1090 | } |
fcaf8878 | 1091 | val = complement_process_encoding_system (val); |
32d08644 | 1092 | |
168afdaa | 1093 | { |
d311d28c | 1094 | ptrdiff_t count1 = SPECPDL_INDEX (); |
168afdaa RS |
1095 | |
1096 | specbind (intern ("coding-system-for-write"), val); | |
bb951f0e KR |
1097 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
1098 | happen to get a ".Z" suffix. */ | |
1099 | specbind (intern ("file-name-handler-alist"), Qnil); | |
168afdaa RS |
1100 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil); |
1101 | ||
1102 | unbind_to (count1, Qnil); | |
1103 | } | |
91489411 | 1104 | |
177c0ea7 | 1105 | /* Note that Fcall_process takes care of binding |
91489411 | 1106 | coding-system-for-read. */ |
093650fe | 1107 | |
80856e74 JB |
1108 | record_unwind_protect (delete_temp_file, filename_string); |
1109 | ||
edf496dd | 1110 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
1111 | Fdelete_region (start, end); |
1112 | ||
edf496dd KH |
1113 | if (nargs > 3) |
1114 | { | |
1115 | args += 2; | |
1116 | nargs -= 2; | |
1117 | } | |
1118 | else | |
1119 | { | |
1120 | args[0] = args[2]; | |
1121 | nargs = 2; | |
1122 | } | |
1123 | args[1] = filename_string; | |
80856e74 | 1124 | |
edf496dd | 1125 | RETURN_UNGCPRO (unbind_to (count, Fcall_process (nargs, args))); |
80856e74 JB |
1126 | } |
1127 | \f | |
361358ea | 1128 | #ifndef WINDOWSNT |
971de7fb | 1129 | static int relocate_fd (int fd, int minfd); |
361358ea | 1130 | #endif |
dfcf069d | 1131 | |
5990851d KL |
1132 | static char ** |
1133 | add_env (char **env, char **new_env, char *string) | |
1134 | { | |
1135 | char **ep; | |
2f221583 | 1136 | bool ok = 1; |
5990851d KL |
1137 | if (string == NULL) |
1138 | return new_env; | |
1139 | ||
1140 | /* See if this string duplicates any string already in the env. | |
1141 | If so, don't put it in. | |
1142 | When an env var has multiple definitions, | |
1143 | we keep the definition that comes first in process-environment. */ | |
1144 | for (ep = env; ok && ep != new_env; ep++) | |
1145 | { | |
1146 | char *p = *ep, *q = string; | |
1147 | while (ok) | |
19ed11ba AS |
1148 | { |
1149 | if (*q != *p) | |
1150 | break; | |
1151 | if (*q == 0) | |
1152 | /* The string is a lone variable name; keep it for now, we | |
1153 | will remove it later. It is a placeholder for a | |
1154 | variable that is not to be included in the environment. */ | |
1155 | break; | |
1156 | if (*q == '=') | |
1157 | ok = 0; | |
1158 | p++, q++; | |
1159 | } | |
5990851d KL |
1160 | } |
1161 | if (ok) | |
1162 | *new_env++ = string; | |
1163 | return new_env; | |
1164 | } | |
1165 | ||
80856e74 JB |
1166 | /* This is the last thing run in a newly forked inferior |
1167 | either synchronous or asynchronous. | |
1168 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
1169 | Initialize inferior's priority, pgrp, connected dir and environment. | |
1170 | then exec another program based on new_argv. | |
1171 | ||
2f221583 | 1172 | If SET_PGRP, put the subprocess into a separate process group. |
e576cab4 JB |
1173 | |
1174 | CURRENT_DIR is an elisp string giving the path of the current | |
1175 | directory the subprocess should have. Since we can't really signal | |
1176 | a decent error from within the child, this should be verified as an | |
1177 | executable directory by the parent. */ | |
80856e74 | 1178 | |
dfcf069d | 1179 | int |
2f221583 PE |
1180 | child_setup (int in, int out, int err, char **new_argv, bool set_pgrp, |
1181 | Lisp_Object current_dir) | |
80856e74 | 1182 | { |
e576cab4 | 1183 | char **env; |
7fcf7f05 | 1184 | char *pwd_var; |
bad95d8f RS |
1185 | #ifdef WINDOWSNT |
1186 | int cpid; | |
4252a4bd | 1187 | HANDLE handles[3]; |
bad95d8f | 1188 | #endif /* WINDOWSNT */ |
e576cab4 | 1189 | |
d311d28c | 1190 | pid_t pid = getpid (); |
80856e74 | 1191 | |
80856e74 JB |
1192 | /* Note that use of alloca is always safe here. It's obvious for systems |
1193 | that do not have true vfork or that have true (stack) alloca. | |
caa01fe0 GM |
1194 | If using vfork and C_ALLOCA (when Emacs used to include |
1195 | src/alloca.c) it is safe because that changes the superior's | |
1196 | static variables as if the superior had done alloca and will be | |
1197 | cleaned up in the usual way. */ | |
e576cab4 | 1198 | { |
7fcf7f05 | 1199 | register char *temp; |
0065d054 | 1200 | size_t i; /* size_t, because ptrdiff_t might overflow here! */ |
77d78be1 | 1201 | |
d5db4077 | 1202 | i = SBYTES (current_dir); |
16425c4a EZ |
1203 | #ifdef MSDOS |
1204 | /* MSDOS must have all environment variables malloc'ed, because | |
1205 | low-level libc functions that launch subsidiary processes rely | |
1206 | on that. */ | |
23f86fce | 1207 | pwd_var = xmalloc (i + 6); |
16425c4a | 1208 | #else |
38182d90 | 1209 | pwd_var = alloca (i + 6); |
16425c4a | 1210 | #endif |
7fcf7f05 | 1211 | temp = pwd_var + 4; |
72af86bd AS |
1212 | memcpy (pwd_var, "PWD=", 4); |
1213 | memcpy (temp, SDATA (current_dir), i); | |
bad95d8f | 1214 | if (!IS_DIRECTORY_SEP (temp[i - 1])) temp[i++] = DIRECTORY_SEP; |
e576cab4 JB |
1215 | temp[i] = 0; |
1216 | ||
c17c4250 | 1217 | #ifndef DOS_NT |
e576cab4 JB |
1218 | /* We can't signal an Elisp error here; we're in a vfork. Since |
1219 | the callers check the current directory before forking, this | |
1220 | should only return an error if the directory's permissions | |
1221 | are changed between the check and this chdir, but we should | |
1222 | at least check. */ | |
1223 | if (chdir (temp) < 0) | |
4ebbdd67 | 1224 | _exit (EXIT_CANCELED); |
f8d23104 | 1225 | #else /* DOS_NT */ |
c17c4250 EZ |
1226 | /* Get past the drive letter, so that d:/ is left alone. */ |
1227 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
1228 | { | |
1229 | temp += 2; | |
1230 | i -= 2; | |
1231 | } | |
f8d23104 | 1232 | #endif /* DOS_NT */ |
c17c4250 | 1233 | |
7fcf7f05 | 1234 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 1235 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 1236 | temp[--i] = 0; |
e576cab4 | 1237 | } |
80856e74 | 1238 | |
5990851d | 1239 | /* Set `env' to a vector of the strings in the environment. */ |
80856e74 JB |
1240 | { |
1241 | register Lisp_Object tem; | |
1242 | register char **new_env; | |
5990851d | 1243 | char **p, **q; |
80856e74 | 1244 | register int new_length; |
d2bb6598 | 1245 | Lisp_Object display = Qnil; |
361358ea | 1246 | |
80856e74 | 1247 | new_length = 0; |
f105f403 | 1248 | |
80856e74 | 1249 | for (tem = Vprocess_environment; |
19ed11ba AS |
1250 | CONSP (tem) && STRINGP (XCAR (tem)); |
1251 | tem = XCDR (tem)) | |
d2bb6598 | 1252 | { |
42a5b22f | 1253 | if (strncmp (SSDATA (XCAR (tem)), "DISPLAY", 7) == 0 |
d2bb6598 SM |
1254 | && (SDATA (XCAR (tem)) [7] == '\0' |
1255 | || SDATA (XCAR (tem)) [7] == '=')) | |
1256 | /* DISPLAY is specified in process-environment. */ | |
1257 | display = Qt; | |
1258 | new_length++; | |
1259 | } | |
de87fb59 | 1260 | |
d2bb6598 SM |
1261 | /* If not provided yet, use the frame's DISPLAY. */ |
1262 | if (NILP (display)) | |
1263 | { | |
1264 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); | |
1265 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) | |
1266 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1267 | tmp = Fgetenv_internal (build_string ("DISPLAY"), | |
1268 | Vinitial_environment); | |
1269 | if (STRINGP (tmp)) | |
1270 | { | |
1271 | display = tmp; | |
1272 | new_length++; | |
1273 | } | |
1274 | } | |
80856e74 | 1275 | |
7fcf7f05 | 1276 | /* new_length + 2 to include PWD and terminating 0. */ |
38182d90 | 1277 | env = new_env = alloca ((new_length + 2) * sizeof *env); |
7fcf7f05 RS |
1278 | /* If we have a PWD envvar, pass one down, |
1279 | but with corrected value. */ | |
a13f8f50 | 1280 | if (egetenv ("PWD")) |
7fcf7f05 | 1281 | *new_env++ = pwd_var; |
361358ea | 1282 | |
6b8e474c | 1283 | if (STRINGP (display)) |
de87fb59 | 1284 | { |
38182d90 | 1285 | char *vdata = alloca (sizeof "DISPLAY=" + SBYTES (display)); |
de87fb59 | 1286 | strcpy (vdata, "DISPLAY="); |
42a5b22f | 1287 | strcat (vdata, SSDATA (display)); |
de87fb59 DN |
1288 | new_env = add_env (env, new_env, vdata); |
1289 | } | |
80856e74 | 1290 | |
5990851d | 1291 | /* Overrides. */ |
80856e74 | 1292 | for (tem = Vprocess_environment; |
70949dac KR |
1293 | CONSP (tem) && STRINGP (XCAR (tem)); |
1294 | tem = XCDR (tem)) | |
42a5b22f | 1295 | new_env = add_env (env, new_env, SSDATA (XCAR (tem))); |
d2bb6598 | 1296 | |
5990851d KL |
1297 | *new_env = 0; |
1298 | ||
1299 | /* Remove variable names without values. */ | |
1300 | p = q = env; | |
1301 | while (*p != 0) | |
cd9565ba | 1302 | { |
19ed11ba AS |
1303 | while (*q != 0 && strchr (*q, '=') == NULL) |
1304 | q++; | |
1305 | *p = *q++; | |
1306 | if (*p != 0) | |
1307 | p++; | |
cd9565ba | 1308 | } |
80856e74 | 1309 | } |
de87fb59 | 1310 | |
361358ea | 1311 | |
bad95d8f RS |
1312 | #ifdef WINDOWSNT |
1313 | prepare_standard_handles (in, out, err, handles); | |
d5db4077 | 1314 | set_process_dir (SDATA (current_dir)); |
d3d14b40 | 1315 | /* Spawn the child. (See w32proc.c:sys_spawnve). */ |
67802943 DN |
1316 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); |
1317 | reset_standard_handles (in, out, err, handles); | |
1318 | if (cpid == -1) | |
1319 | /* An error occurred while trying to spawn the process. */ | |
1320 | report_file_error ("Spawning child process", Qnil); | |
1321 | return cpid; | |
1322 | ||
bad95d8f | 1323 | #else /* not WINDOWSNT */ |
426b37ae JB |
1324 | /* Make sure that in, out, and err are not actually already in |
1325 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1326 | started with its standard in, out, or error closed, as might |
426b37ae | 1327 | happen under X. */ |
f29f9e4a RS |
1328 | { |
1329 | int oin = in, oout = out; | |
1330 | ||
1331 | /* We have to avoid relocating the same descriptor twice! */ | |
1332 | ||
1333 | in = relocate_fd (in, 3); | |
1334 | ||
1335 | if (out == oin) | |
1336 | out = in; | |
1337 | else | |
3e9367e7 | 1338 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1339 | |
1340 | if (err == oin) | |
1341 | err = in; | |
1342 | else if (err == oout) | |
1343 | err = out; | |
1344 | else | |
3e9367e7 | 1345 | err = relocate_fd (err, 3); |
f29f9e4a | 1346 | } |
426b37ae | 1347 | |
c17c4250 | 1348 | #ifndef MSDOS |
4700b5a5 PE |
1349 | /* Redirect file descriptors and clear the close-on-exec flag on the |
1350 | redirected ones. IN, OUT, and ERR are close-on-exec so they | |
1351 | need not be closed explicitly. */ | |
80856e74 JB |
1352 | dup2 (in, 0); |
1353 | dup2 (out, 1); | |
1354 | dup2 (err, 2); | |
067428c1 | 1355 | |
dd0333b6 | 1356 | setpgid (0, 0); |
12e610e8 | 1357 | tcsetpgrp (0, pid); |
a7ebc409 | 1358 | |
21e54a94 | 1359 | execve (new_argv[0], new_argv, env); |
80856e74 | 1360 | |
4ebbdd67 PE |
1361 | /* Don't output the program name here, as it can be arbitrarily long, |
1362 | and a long write from a vforked child to its parent can cause a | |
1363 | deadlock. */ | |
1364 | emacs_perror ("child process"); | |
1365 | ||
1366 | _exit (errno == ENOENT ? EXIT_ENOENT : EXIT_CANNOT_INVOKE); | |
67802943 DN |
1367 | |
1368 | #else /* MSDOS */ | |
1369 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
1370 | xfree (pwd_var); | |
1371 | if (pid == -1) | |
1372 | /* An error occurred while trying to run the subprocess. */ | |
1373 | report_file_error ("Spawning child process", Qnil); | |
1374 | return pid; | |
1375 | #endif /* MSDOS */ | |
ae76d9e1 | 1376 | #endif /* not WINDOWSNT */ |
80856e74 JB |
1377 | } |
1378 | ||
361358ea | 1379 | #ifndef WINDOWSNT |
a3833dfe | 1380 | /* Move the file descriptor FD so that its number is not less than MINFD. |
4700b5a5 PE |
1381 | If the file descriptor is moved at all, the original is closed on MSDOS, |
1382 | but not elsewhere as the caller will close it anyway. */ | |
dfcf069d | 1383 | static int |
971de7fb | 1384 | relocate_fd (int fd, int minfd) |
426b37ae | 1385 | { |
a3833dfe | 1386 | if (fd >= minfd) |
426b37ae JB |
1387 | return fd; |
1388 | else | |
1389 | { | |
067428c1 | 1390 | int new = fcntl (fd, F_DUPFD_CLOEXEC, minfd); |
426b37ae JB |
1391 | if (new == -1) |
1392 | { | |
4ebbdd67 PE |
1393 | emacs_perror ("while setting up child"); |
1394 | _exit (EXIT_CANCELED); | |
426b37ae | 1395 | } |
4700b5a5 | 1396 | #ifdef MSDOS |
68c45bf0 | 1397 | emacs_close (fd); |
4700b5a5 | 1398 | #endif |
426b37ae JB |
1399 | return new; |
1400 | } | |
1401 | } | |
361358ea | 1402 | #endif /* not WINDOWSNT */ |
426b37ae | 1403 | |
2f221583 | 1404 | static bool |
989f33ba PE |
1405 | getenv_internal_1 (const char *var, ptrdiff_t varlen, char **value, |
1406 | ptrdiff_t *valuelen, Lisp_Object env) | |
012c6fcb | 1407 | { |
db699fc6 | 1408 | for (; CONSP (env); env = XCDR (env)) |
012c6fcb | 1409 | { |
db699fc6 | 1410 | Lisp_Object entry = XCAR (env); |
d50d3dc8 | 1411 | if (STRINGP (entry) |
db699fc6 | 1412 | && SBYTES (entry) >= varlen |
bad95d8f RS |
1413 | #ifdef WINDOWSNT |
1414 | /* NT environment variables are case insensitive. */ | |
d5db4077 | 1415 | && ! strnicmp (SDATA (entry), var, varlen) |
bad95d8f | 1416 | #else /* not WINDOWSNT */ |
72af86bd | 1417 | && ! memcmp (SDATA (entry), var, varlen) |
bad95d8f | 1418 | #endif /* not WINDOWSNT */ |
a9971c6d | 1419 | ) |
012c6fcb | 1420 | { |
db699fc6 SM |
1421 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') |
1422 | { | |
51b59d79 | 1423 | *value = SSDATA (entry) + (varlen + 1); |
db699fc6 SM |
1424 | *valuelen = SBYTES (entry) - (varlen + 1); |
1425 | return 1; | |
1426 | } | |
1427 | else if (SBYTES (entry) == varlen) | |
1428 | { | |
1429 | /* Lone variable names in Vprocess_environment mean that | |
1430 | variable should be removed from the environment. */ | |
1431 | *value = NULL; | |
1432 | return 1; | |
1433 | } | |
1434 | } | |
1435 | } | |
1436 | return 0; | |
1437 | } | |
1438 | ||
2f221583 | 1439 | static bool |
989f33ba PE |
1440 | getenv_internal (const char *var, ptrdiff_t varlen, char **value, |
1441 | ptrdiff_t *valuelen, Lisp_Object frame) | |
012c6fcb | 1442 | { |
d2bb6598 SM |
1443 | /* Try to find VAR in Vprocess_environment first. */ |
1444 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1445 | Vprocess_environment)) | |
1446 | return *value ? 1 : 0; | |
f105f403 | 1447 | |
d2bb6598 | 1448 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
de87fb59 | 1449 | if (strcmp (var, "DISPLAY") == 0) |
d2bb6598 SM |
1450 | { |
1451 | Lisp_Object display | |
1452 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); | |
1453 | if (STRINGP (display)) | |
1454 | { | |
51b59d79 | 1455 | *value = SSDATA (display); |
de87fb59 | 1456 | *valuelen = SBYTES (display); |
012c6fcb JA |
1457 | return 1; |
1458 | } | |
d2bb6598 SM |
1459 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
1460 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1461 | Vinitial_environment)) | |
1462 | return *value ? 1 : 0; | |
012c6fcb JA |
1463 | } |
1464 | ||
1465 | return 0; | |
1466 | } | |
1467 | ||
f105f403 | 1468 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
5990851d KL |
1469 | doc: /* Get the value of environment variable VARIABLE. |
1470 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
1471 | the environment. Otherwise, value is a string. | |
f105f403 | 1472 | |
acf20901 | 1473 | This function searches `process-environment' for VARIABLE. |
5990851d | 1474 | |
db699fc6 | 1475 | If optional parameter ENV is a list, then search this list instead of |
acf20901 JB |
1476 | `process-environment', and return t when encountering a negative entry |
1477 | \(an entry for a variable with no value). */) | |
5842a27b | 1478 | (Lisp_Object variable, Lisp_Object env) |
012c6fcb JA |
1479 | { |
1480 | char *value; | |
989f33ba | 1481 | ptrdiff_t valuelen; |
012c6fcb | 1482 | |
5990851d | 1483 | CHECK_STRING (variable); |
db699fc6 SM |
1484 | if (CONSP (env)) |
1485 | { | |
42a5b22f | 1486 | if (getenv_internal_1 (SSDATA (variable), SBYTES (variable), |
db699fc6 SM |
1487 | &value, &valuelen, env)) |
1488 | return value ? make_string (value, valuelen) : Qt; | |
1489 | else | |
1490 | return Qnil; | |
1491 | } | |
42a5b22f | 1492 | else if (getenv_internal (SSDATA (variable), SBYTES (variable), |
d2bb6598 | 1493 | &value, &valuelen, env)) |
012c6fcb JA |
1494 | return make_string (value, valuelen); |
1495 | else | |
1496 | return Qnil; | |
1497 | } | |
1498 | ||
5990851d KL |
1499 | /* A version of getenv that consults the Lisp environment lists, |
1500 | easily callable from C. */ | |
012c6fcb | 1501 | char * |
a8fe7202 | 1502 | egetenv (const char *var) |
012c6fcb JA |
1503 | { |
1504 | char *value; | |
25c7e41f | 1505 | ptrdiff_t valuelen; |
012c6fcb | 1506 | |
f105f403 | 1507 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
012c6fcb JA |
1508 | return value; |
1509 | else | |
1510 | return 0; | |
1511 | } | |
1512 | ||
80856e74 | 1513 | \f |
8de15d69 | 1514 | /* This is run before init_cmdargs. */ |
177c0ea7 | 1515 | |
dfcf069d | 1516 | void |
971de7fb | 1517 | init_callproc_1 (void) |
8de15d69 | 1518 | { |
d01ba2f1 GM |
1519 | #ifdef HAVE_NS |
1520 | const char *etc_dir = ns_etc_directory (); | |
cbb31951 | 1521 | const char *path_exec = ns_exec_path (); |
d01ba2f1 | 1522 | #endif |
35a2f4b8 | 1523 | |
76151e2c | 1524 | Vdata_directory = decode_env_path ("EMACSDATA", |
d01ba2f1 | 1525 | #ifdef HAVE_NS |
76151e2c | 1526 | etc_dir ? etc_dir : |
d01ba2f1 | 1527 | #endif |
76151e2c EZ |
1528 | PATH_DATA); |
1529 | Vdata_directory = Ffile_name_as_directory (Fcar (Vdata_directory)); | |
1530 | ||
1531 | Vdoc_directory = decode_env_path ("EMACSDOC", | |
d01ba2f1 | 1532 | #ifdef HAVE_NS |
76151e2c | 1533 | etc_dir ? etc_dir : |
d01ba2f1 | 1534 | #endif |
76151e2c EZ |
1535 | PATH_DOC); |
1536 | Vdoc_directory = Ffile_name_as_directory (Fcar (Vdoc_directory)); | |
9453ea7b | 1537 | |
e576cab4 | 1538 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1539 | PATH_EXEC path from epaths.h. */ |
cbb31951 GM |
1540 | Vexec_path = decode_env_path ("EMACSPATH", |
1541 | #ifdef HAVE_NS | |
1542 | path_exec ? path_exec : | |
1543 | #endif | |
1544 | PATH_EXEC); | |
80856e74 | 1545 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
cbb31951 | 1546 | /* FIXME? For ns, path_exec should go at the front? */ |
80856e74 | 1547 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); |
8de15d69 RS |
1548 | } |
1549 | ||
e17f7533 | 1550 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1551 | |
dfcf069d | 1552 | void |
971de7fb | 1553 | init_callproc (void) |
8de15d69 RS |
1554 | { |
1555 | char *data_dir = egetenv ("EMACSDATA"); | |
177c0ea7 | 1556 | |
8de15d69 RS |
1557 | register char * sh; |
1558 | Lisp_Object tempdir; | |
d01ba2f1 GM |
1559 | #ifdef HAVE_NS |
1560 | if (data_dir == 0) | |
1561 | { | |
1562 | const char *etc_dir = ns_etc_directory (); | |
1563 | if (etc_dir) | |
1564 | { | |
1565 | data_dir = alloca (strlen (etc_dir) + 1); | |
1566 | strcpy (data_dir, etc_dir); | |
1567 | } | |
1568 | } | |
1569 | #endif | |
8de15d69 | 1570 | |
9cc4fad5 | 1571 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1572 | { |
05630743 RS |
1573 | /* Add to the path the lib-src subdir of the installation dir. */ |
1574 | Lisp_Object tem; | |
1575 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1576 | Vinstallation_directory); | |
76151e2c | 1577 | #ifndef MSDOS |
1a6640ec | 1578 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc | 1579 | if (NILP (Fmember (tem, Vexec_path))) |
70ec1377 | 1580 | { |
cbb31951 GM |
1581 | #ifdef HAVE_NS |
1582 | const char *path_exec = ns_exec_path (); | |
1583 | #endif | |
1584 | Vexec_path = decode_env_path ("EMACSPATH", | |
1585 | #ifdef HAVE_NS | |
1586 | path_exec ? path_exec : | |
1587 | #endif | |
1588 | PATH_EXEC); | |
70ec1377 RS |
1589 | Vexec_path = Fcons (tem, Vexec_path); |
1590 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
1591 | } | |
177c0ea7 | 1592 | |
0fa248bc | 1593 | Vexec_directory = Ffile_name_as_directory (tem); |
76151e2c | 1594 | #endif /* not MSDOS */ |
8de15d69 | 1595 | |
e17f7533 RS |
1596 | /* Maybe use ../etc as well as ../lib-src. */ |
1597 | if (data_dir == 0) | |
1598 | { | |
1599 | tem = Fexpand_file_name (build_string ("etc"), | |
1600 | Vinstallation_directory); | |
1601 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1602 | } |
1603 | } | |
7e933683 RS |
1604 | |
1605 | /* Look for the files that should be in etc. We don't use | |
1606 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1607 | near the executable, and they are never in the build |
7e933683 RS |
1608 | directory when that's different from the source directory. |
1609 | ||
1610 | Instead, if these files are not in the nominal place, we try the | |
1611 | source directory. */ | |
1612 | if (data_dir == 0) | |
1613 | { | |
70ec1377 | 1614 | Lisp_Object tem, tem1, srcdir; |
7e933683 | 1615 | |
70ec1377 RS |
1616 | srcdir = Fexpand_file_name (build_string ("../src/"), |
1617 | build_string (PATH_DUMPLOADSEARCH)); | |
7e933683 RS |
1618 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); |
1619 | tem1 = Ffile_exists_p (tem); | |
70ec1377 | 1620 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
7e933683 | 1621 | { |
70ec1377 | 1622 | Lisp_Object newdir; |
7e933683 RS |
1623 | newdir = Fexpand_file_name (build_string ("../etc/"), |
1624 | build_string (PATH_DUMPLOADSEARCH)); | |
1625 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1626 | tem1 = Ffile_exists_p (tem); | |
1627 | if (!NILP (tem1)) | |
1628 | Vdata_directory = newdir; | |
1629 | } | |
1630 | } | |
80856e74 | 1631 | |
d883eb62 RS |
1632 | #ifndef CANNOT_DUMP |
1633 | if (initialized) | |
1634 | #endif | |
1635 | { | |
1636 | tempdir = Fdirectory_file_name (Vexec_directory); | |
73dcdb9f PE |
1637 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
1638 | dir_warning ("arch-dependent data dir", Vexec_directory); | |
d883eb62 | 1639 | } |
80856e74 | 1640 | |
e576cab4 | 1641 | tempdir = Fdirectory_file_name (Vdata_directory); |
73dcdb9f PE |
1642 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
1643 | dir_warning ("arch-independent data dir", Vdata_directory); | |
e576cab4 | 1644 | |
83be8524 | 1645 | sh = getenv ("SHELL"); |
80856e74 | 1646 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
8abd035b | 1647 | |
40b49d4b JB |
1648 | #ifdef DOS_NT |
1649 | Vshared_game_score_directory = Qnil; | |
1650 | #else | |
63789758 | 1651 | Vshared_game_score_directory = build_string (PATH_GAME); |
73dcdb9f | 1652 | if (NILP (Ffile_accessible_directory_p (Vshared_game_score_directory))) |
63789758 | 1653 | Vshared_game_score_directory = Qnil; |
40b49d4b | 1654 | #endif |
9fefd2ba JB |
1655 | } |
1656 | ||
dfcf069d | 1657 | void |
971de7fb | 1658 | set_initial_environment (void) |
9fefd2ba | 1659 | { |
738db178 DN |
1660 | char **envp; |
1661 | for (envp = environ; *envp; envp++) | |
1662 | Vprocess_environment = Fcons (build_string (*envp), | |
1663 | Vprocess_environment); | |
1664 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent | |
1665 | to use `delete' and friends on process-environment. */ | |
1666 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); | |
80856e74 JB |
1667 | } |
1668 | ||
dfcf069d | 1669 | void |
971de7fb | 1670 | syms_of_callproc (void) |
80856e74 | 1671 | { |
f92d51d8 CY |
1672 | #ifndef DOS_NT |
1673 | Vtemp_file_name_pattern = build_string ("emacsXXXXXX"); | |
1674 | #elif defined (WINDOWSNT) | |
1675 | Vtemp_file_name_pattern = build_string ("emXXXXXX"); | |
1676 | #else | |
1677 | Vtemp_file_name_pattern = build_string ("detmp.XXX"); | |
1678 | #endif | |
1679 | staticpro (&Vtemp_file_name_pattern); | |
1680 | ||
29208e82 | 1681 | DEFVAR_LISP ("shell-file-name", Vshell_file_name, |
fb7ada5f | 1682 | doc: /* File name to load inferior shells from. |
b20b29be EZ |
1683 | Initialized from the SHELL environment variable, or to a system-dependent |
1684 | default if SHELL is not set. */); | |
80856e74 | 1685 | |
29208e82 | 1686 | DEFVAR_LISP ("exec-path", Vexec_path, |
fb7ada5f | 1687 | doc: /* List of directories to search programs to run in subprocesses. |
fdb82f93 | 1688 | Each element is a string (directory name) or nil (try default directory). */); |
80856e74 | 1689 | |
29208e82 | 1690 | DEFVAR_LISP ("exec-suffixes", Vexec_suffixes, |
fb7ada5f | 1691 | doc: /* List of suffixes to try to find executable file names. |
fdb82f93 | 1692 | Each element is a string. */); |
33d5af99 | 1693 | Vexec_suffixes = Qnil; |
b81a1b72 | 1694 | |
29208e82 | 1695 | DEFVAR_LISP ("exec-directory", Vexec_directory, |
fdb82f93 PJ |
1696 | doc: /* Directory for executables for Emacs to invoke. |
1697 | More generally, this includes any architecture-dependent files | |
1698 | that are built and installed from the Emacs distribution. */); | |
e576cab4 | 1699 | |
29208e82 | 1700 | DEFVAR_LISP ("data-directory", Vdata_directory, |
fdb82f93 PJ |
1701 | doc: /* Directory of machine-independent files that come with GNU Emacs. |
1702 | These are files intended for Emacs to use while it runs. */); | |
80856e74 | 1703 | |
29208e82 | 1704 | DEFVAR_LISP ("doc-directory", Vdoc_directory, |
fdb82f93 | 1705 | doc: /* Directory containing the DOC file that comes with GNU Emacs. |
ebf24b59 | 1706 | This is usually the same as `data-directory'. */); |
35a2f4b8 | 1707 | |
29208e82 | 1708 | DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory, |
fdb82f93 PJ |
1709 | doc: /* For internal use by the build procedure only. |
1710 | This is the name of the directory in which the build procedure installed | |
ebf24b59 | 1711 | Emacs's info files; the default value for `Info-default-directory-list' |
fdb82f93 | 1712 | includes this. */); |
ed61592a JB |
1713 | Vconfigure_info_directory = build_string (PATH_INFO); |
1714 | ||
29208e82 | 1715 | DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory, |
b065672a CW |
1716 | doc: /* Directory of score files for games which come with GNU Emacs. |
1717 | If this variable is nil, then Emacs is unable to use a shared directory. */); | |
40b49d4b JB |
1718 | #ifdef DOS_NT |
1719 | Vshared_game_score_directory = Qnil; | |
1720 | #else | |
63789758 | 1721 | Vshared_game_score_directory = build_string (PATH_GAME); |
40b49d4b | 1722 | #endif |
b065672a | 1723 | |
29208e82 | 1724 | DEFVAR_LISP ("initial-environment", Vinitial_environment, |
6b8e474c SM |
1725 | doc: /* List of environment variables inherited from the parent process. |
1726 | Each element should be a string of the form ENVVARNAME=VALUE. | |
1727 | The elements must normally be decoded (using `locale-coding-system') for use. */); | |
1728 | Vinitial_environment = Qnil; | |
1729 | ||
29208e82 | 1730 | DEFVAR_LISP ("process-environment", Vprocess_environment, |
5990851d | 1731 | doc: /* List of overridden environment variables for subprocesses to inherit. |
fdb82f93 | 1732 | Each element should be a string of the form ENVVARNAME=VALUE. |
5990851d | 1733 | |
a13f8f50 KL |
1734 | Entries in this list take precedence to those in the frame-local |
1735 | environments. Therefore, let-binding `process-environment' is an easy | |
1736 | way to temporarily change the value of an environment variable, | |
1737 | irrespective of where it comes from. To use `process-environment' to | |
1738 | remove an environment variable, include only its name in the list, | |
1739 | without "=VALUE". | |
5990851d KL |
1740 | |
1741 | This variable is set to nil when Emacs starts. | |
1742 | ||
fdb82f93 PJ |
1743 | If multiple entries define the same variable, the first one always |
1744 | takes precedence. | |
5990851d | 1745 | |
776a24a1 | 1746 | Non-ASCII characters are encoded according to the initial value of |
5990851d KL |
1747 | `locale-coding-system', i.e. the elements must normally be decoded for |
1748 | use. | |
1749 | ||
776a24a1 | 1750 | See `setenv' and `getenv'. */); |
86f5ca04 | 1751 | Vprocess_environment = Qnil; |
80856e74 | 1752 | |
80856e74 | 1753 | defsubr (&Scall_process); |
83fa009c | 1754 | defsubr (&Sgetenv_internal); |
e576cab4 | 1755 | defsubr (&Scall_process_region); |
80856e74 | 1756 | } |