Commit | Line | Data |
---|---|---|
80856e74 | 1 | /* Synchronous subprocess invocation for GNU Emacs. |
17e0445b | 2 | |
ba318903 PE |
3 | Copyright (C) 1985-1988, 1993-1995, 1999-2014 Free Software Foundation, |
4 | Inc. | |
80856e74 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
80856e74 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
80856e74 JB |
12 | |
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
80856e74 JB |
20 | |
21 | ||
68c45bf0 | 22 | #include <config.h> |
e576cab4 | 23 | #include <errno.h> |
565620a5 | 24 | #include <stdio.h> |
80856e74 | 25 | #include <sys/types.h> |
3cbd6585 | 26 | #include <unistd.h> |
3cbd6585 | 27 | |
80856e74 | 28 | #include <sys/file.h> |
80856e74 | 29 | #include <fcntl.h> |
80856e74 | 30 | |
0898ca10 JB |
31 | #include "lisp.h" |
32 | ||
bad95d8f RS |
33 | #ifdef WINDOWSNT |
34 | #define NOMINMAX | |
1d442672 | 35 | #include <sys/socket.h> /* for fcntl */ |
bad95d8f | 36 | #include <windows.h> |
489f9371 | 37 | #include "w32.h" |
bad95d8f RS |
38 | #define _P_NOWAIT 1 /* from process.h */ |
39 | #endif | |
40 | ||
7e6c2178 | 41 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
7e6c2178 RS |
42 | #include <sys/stat.h> |
43 | #include <sys/param.h> | |
7e6c2178 RS |
44 | #endif /* MSDOS */ |
45 | ||
80856e74 | 46 | #include "commands.h" |
91183bfd | 47 | #include "character.h" |
e5560ff7 | 48 | #include "buffer.h" |
edf496dd | 49 | #include "ccl.h" |
32d08644 | 50 | #include "coding.h" |
f0b950cf | 51 | #include "composite.h" |
57bda87a | 52 | #include <epaths.h> |
80856e74 | 53 | #include "process.h" |
d177f194 | 54 | #include "syssignal.h" |
a129418f | 55 | #include "systty.h" |
afea8a8a | 56 | #include "syswait.h" |
aba637ec | 57 | #include "blockinput.h" |
f105f403 KL |
58 | #include "frame.h" |
59 | #include "termhooks.h" | |
80856e74 | 60 | |
5f027cea EZ |
61 | #ifdef MSDOS |
62 | #include "msdos.h" | |
63 | #endif | |
64 | ||
d01ba2f1 GM |
65 | #ifdef HAVE_NS |
66 | #include "nsterm.h" | |
67 | #endif | |
68 | ||
f92d51d8 CY |
69 | /* Pattern used by call-process-region to make temp files. */ |
70 | static Lisp_Object Vtemp_file_name_pattern; | |
71 | ||
94fcd171 PE |
72 | /* The next two variables are used while record-unwind-protect is in place |
73 | during call-process for a subprocess for which record_deleted_pid has | |
74 | not yet been called. At other times, synch_process_pid is zero and | |
75 | synch_process_tempfile's contents are irrelevant. Doing this via static | |
bb5f74ee PE |
76 | C variables is more convenient than putting them into the arguments |
77 | of record-unwind-protect, as they need to be updated at randomish | |
78 | times in the code, and Lisp cannot always store these values as | |
79 | Emacs integers. It's safe to use static variables here, as the | |
80 | code is never invoked reentrantly. */ | |
81 | ||
82 | /* If nonzero, a process-ID that has not been reaped. */ | |
83 | static pid_t synch_process_pid; | |
84 | ||
94fcd171 PE |
85 | /* If a string, the name of a temp file that has not been removed. */ |
86 | #ifdef MSDOS | |
87 | static Lisp_Object synch_process_tempfile; | |
88 | #else | |
89 | # define synch_process_tempfile make_number (0) | |
90 | #endif | |
91 | ||
92 | /* Indexes of file descriptors that need closing on call_process_kill. */ | |
93 | enum | |
94 | { | |
95 | /* The subsidiary process's stdout and stderr. stdin is handled | |
96 | separately, in either Fcall_process_region or create_temp_file. */ | |
97 | CALLPROC_STDOUT, CALLPROC_STDERR, | |
98 | ||
99 | /* How to read from a pipe (or substitute) from the subsidiary process. */ | |
100 | CALLPROC_PIPEREAD, | |
101 | ||
102 | /* A bound on the number of file descriptors. */ | |
103 | CALLPROC_FDS | |
104 | }; | |
105 | ||
4a88129a | 106 | static Lisp_Object call_process (ptrdiff_t, Lisp_Object *, int, ptrdiff_t); |
bb5f74ee PE |
107 | \f |
108 | /* Block SIGCHLD. */ | |
80856e74 | 109 | |
c7041908 | 110 | void |
bb5f74ee PE |
111 | block_child_signal (void) |
112 | { | |
bb5f74ee PE |
113 | sigset_t blocked; |
114 | sigemptyset (&blocked); | |
115 | sigaddset (&blocked, SIGCHLD); | |
116 | pthread_sigmask (SIG_BLOCK, &blocked, 0); | |
bb5f74ee | 117 | } |
6b61353c | 118 | |
bb5f74ee | 119 | /* Unblock SIGCHLD. */ |
f105f403 | 120 | |
c7041908 | 121 | void |
bb5f74ee PE |
122 | unblock_child_signal (void) |
123 | { | |
bb5f74ee | 124 | pthread_sigmask (SIG_SETMASK, &empty_mask, 0); |
bb5f74ee | 125 | } |
37d54121 | 126 | |
c365c355 PE |
127 | /* Return the current buffer's working directory, or the home |
128 | directory if it's unreachable, as a string suitable for a system call. | |
129 | Signal an error if the result would not be an accessible directory. */ | |
130 | ||
131 | Lisp_Object | |
132 | encode_current_directory (void) | |
133 | { | |
134 | Lisp_Object dir; | |
135 | struct gcpro gcpro1; | |
136 | ||
137 | dir = BVAR (current_buffer, directory); | |
138 | GCPRO1 (dir); | |
139 | ||
140 | dir = Funhandled_file_name_directory (dir); | |
141 | ||
142 | /* If the file name handler says that dir is unreachable, use | |
143 | a sensible default. */ | |
144 | if (NILP (dir)) | |
145 | dir = build_string ("~"); | |
146 | ||
147 | dir = expand_and_dir_to_file (dir, Qnil); | |
148 | ||
149 | if (STRING_MULTIBYTE (dir)) | |
150 | dir = ENCODE_FILE (dir); | |
151 | if (! file_accessible_directory_p (SSDATA (dir))) | |
152 | report_file_error ("Setting current directory", | |
153 | BVAR (current_buffer, directory)); | |
154 | ||
155 | RETURN_UNGCPRO (dir); | |
156 | } | |
157 | ||
35fb8050 PE |
158 | /* If P is reapable, record it as a deleted process and kill it. |
159 | Do this in a critical section. Unless PID is wedged it will be | |
160 | reaped on receipt of the first SIGCHLD after the critical section. */ | |
161 | ||
162 | void | |
94fcd171 | 163 | record_kill_process (struct Lisp_Process *p, Lisp_Object tempfile) |
35fb8050 PE |
164 | { |
165 | block_child_signal (); | |
166 | ||
167 | if (p->alive) | |
168 | { | |
94fcd171 | 169 | record_deleted_pid (p->pid, tempfile); |
35fb8050 | 170 | p->alive = 0; |
d983a10b | 171 | kill (- p->pid, SIGKILL); |
35fb8050 PE |
172 | } |
173 | ||
174 | unblock_child_signal (); | |
175 | } | |
176 | ||
94fcd171 PE |
177 | /* Clean up files, file descriptors and processes created by Fcall_process. */ |
178 | ||
179 | static void | |
180 | delete_temp_file (Lisp_Object name) | |
181 | { | |
182 | unlink (SSDATA (name)); | |
183 | } | |
37d54121 | 184 | |
27e498e6 | 185 | static void |
94fcd171 | 186 | call_process_kill (void *ptr) |
d177f194 | 187 | { |
94fcd171 PE |
188 | int *callproc_fd = ptr; |
189 | int i; | |
190 | for (i = 0; i < CALLPROC_FDS; i++) | |
191 | if (0 <= callproc_fd[i]) | |
192 | emacs_close (callproc_fd[i]); | |
bb5f74ee | 193 | |
bb5f74ee PE |
194 | if (synch_process_pid) |
195 | { | |
35fb8050 PE |
196 | struct Lisp_Process proc; |
197 | proc.alive = 1; | |
198 | proc.pid = synch_process_pid; | |
94fcd171 PE |
199 | record_kill_process (&proc, synch_process_tempfile); |
200 | synch_process_pid = 0; | |
bb5f74ee | 201 | } |
94fcd171 PE |
202 | else if (STRINGP (synch_process_tempfile)) |
203 | delete_temp_file (synch_process_tempfile); | |
d177f194 JB |
204 | } |
205 | ||
94fcd171 PE |
206 | /* Clean up when exiting Fcall_process: restore the buffer, and |
207 | kill the subsidiary process group if the process still exists. */ | |
bb5f74ee | 208 | |
27e498e6 | 209 | static void |
94fcd171 | 210 | call_process_cleanup (Lisp_Object buffer) |
80856e74 | 211 | { |
bb5f74ee | 212 | Fset_buffer (buffer); |
d177f194 | 213 | |
bb5f74ee | 214 | if (synch_process_pid) |
d177f194 | 215 | { |
d983a10b | 216 | kill (-synch_process_pid, SIGINT); |
d177f194 JB |
217 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); |
218 | immediate_quit = 1; | |
219 | QUIT; | |
bb5f74ee PE |
220 | wait_for_termination (synch_process_pid, 0, 1); |
221 | synch_process_pid = 0; | |
d177f194 | 222 | immediate_quit = 0; |
d177f194 JB |
223 | message1 ("Waiting for process to die...done"); |
224 | } | |
80856e74 JB |
225 | } |
226 | ||
406af475 PE |
227 | #ifdef DOS_NT |
228 | static mode_t const default_output_mode = S_IREAD | S_IWRITE; | |
229 | #else | |
230 | static mode_t const default_output_mode = 0666; | |
231 | #endif | |
232 | ||
a7ca3326 | 233 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, |
fdb82f93 PJ |
234 | doc: /* Call PROGRAM synchronously in separate process. |
235 | The remaining arguments are optional. | |
236 | The program's input comes from file INFILE (nil means `/dev/null'). | |
38cd43eb | 237 | Insert output in DESTINATION before point; t means current buffer; nil for DESTINATION |
1ef14cb4 | 238 | means discard it; 0 means discard and don't wait; and `(:file FILE)', where |
1b9f60cc GM |
239 | FILE is a file name string, means that it should be written to that file |
240 | \(if the file already exists it is overwritten). | |
38cd43eb | 241 | DESTINATION can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
fdb82f93 PJ |
242 | REAL-BUFFER says what to do with standard output, as above, |
243 | while STDERR-FILE says what to do with standard error in the child. | |
244 | STDERR-FILE may be nil (discard standard error output), | |
245 | t (mix it with ordinary output), or a file name string. | |
246 | ||
247 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
248 | Remaining arguments are strings passed as command arguments to PROGRAM. | |
249 | ||
a4feb144 RS |
250 | If executable PROGRAM can't be found as an executable, `call-process' |
251 | signals a Lisp error. `call-process' reports errors in execution of | |
252 | the program only through its return and output. | |
253 | ||
38cd43eb | 254 | If DESTINATION is 0, `call-process' returns immediately with value nil. |
fdb82f93 PJ |
255 | Otherwise it waits for PROGRAM to terminate |
256 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
257 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
258 | ||
38cd43eb | 259 | usage: (call-process PROGRAM &optional INFILE DESTINATION DISPLAY &rest ARGS) */) |
f66c7cf8 | 260 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 261 | { |
94fcd171 PE |
262 | Lisp_Object infile, encoded_infile; |
263 | int filefd; | |
264 | struct gcpro gcpro1; | |
265 | ptrdiff_t count = SPECPDL_INDEX (); | |
266 | ||
267 | if (nargs >= 2 && ! NILP (args[1])) | |
268 | { | |
269 | infile = Fexpand_file_name (args[1], BVAR (current_buffer, directory)); | |
270 | CHECK_STRING (infile); | |
271 | } | |
272 | else | |
273 | infile = build_string (NULL_DEVICE); | |
274 | ||
275 | GCPRO1 (infile); | |
276 | encoded_infile = STRING_MULTIBYTE (infile) ? ENCODE_FILE (infile) : infile; | |
277 | ||
278 | filefd = emacs_open (SSDATA (encoded_infile), O_RDONLY, 0); | |
279 | if (filefd < 0) | |
280 | report_file_error ("Opening process input file", infile); | |
281 | record_unwind_protect_int (close_file_unwind, filefd); | |
282 | UNGCPRO; | |
4a88129a | 283 | return unbind_to (count, call_process (nargs, args, filefd, -1)); |
94fcd171 PE |
284 | } |
285 | ||
286 | /* Like Fcall_process (NARGS, ARGS), except use FILEFD as the input file. | |
4a88129a PE |
287 | |
288 | If TEMPFILE_INDEX is nonnegative, it is the specpdl index of an | |
289 | unwinder that is intended to remove the input temporary file; in | |
290 | this case NARGS must be at least 2 and ARGS[1] is the file's name. | |
291 | ||
94fcd171 PE |
292 | At entry, the specpdl stack top entry must be close_file_unwind (FILEFD). */ |
293 | ||
294 | static Lisp_Object | |
4a88129a PE |
295 | call_process (ptrdiff_t nargs, Lisp_Object *args, int filefd, |
296 | ptrdiff_t tempfile_index) | |
94fcd171 PE |
297 | { |
298 | Lisp_Object buffer, current_dir, path; | |
2f221583 | 299 | bool display_p; |
94fcd171 PE |
300 | int fd0; |
301 | int callproc_fd[CALLPROC_FDS]; | |
bb5f74ee | 302 | int status; |
94fcd171 | 303 | ptrdiff_t i; |
d311d28c PE |
304 | ptrdiff_t count = SPECPDL_INDEX (); |
305 | USE_SAFE_ALLOCA; | |
2d607244 | 306 | |
60aeceb8 | 307 | char **new_argv; |
39eaa782 RS |
308 | /* File to use for stderr in the child. |
309 | t means use same as standard output. */ | |
310 | Lisp_Object error_file; | |
1ef14cb4 | 311 | Lisp_Object output_file = Qnil; |
7e6c2178 | 312 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
94fcd171 | 313 | char *tempfile = NULL; |
d311d28c PE |
314 | int pid; |
315 | #else | |
316 | pid_t pid; | |
80856e74 | 317 | #endif |
bb5f74ee | 318 | int child_errno; |
94fcd171 | 319 | int fd_output, fd_error; |
32d08644 KH |
320 | struct coding_system process_coding; /* coding-system of process output */ |
321 | struct coding_system argument_coding; /* coding-system of arguments */ | |
09494912 RS |
322 | /* Set to the return value of Ffind_operation_coding_system. */ |
323 | Lisp_Object coding_systems; | |
94fcd171 PE |
324 | bool discard_output; |
325 | ||
326 | if (synch_process_pid) | |
327 | error ("call-process invoked recursively"); | |
09494912 RS |
328 | |
329 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ | |
330 | coding_systems = Qt; | |
32d08644 | 331 | |
b7826503 | 332 | CHECK_STRING (args[0]); |
80856e74 | 333 | |
39eaa782 RS |
334 | error_file = Qt; |
335 | ||
7e6c2178 RS |
336 | #ifndef subprocesses |
337 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
177c0ea7 | 338 | if (nargs >= 3 |
09ffb8b5 | 339 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
340 | error ("Operating system cannot handle asynchronous subprocesses"); |
341 | #endif /* subprocesses */ | |
342 | ||
09494912 | 343 | /* Decide the coding-system for giving arguments. */ |
32d08644 KH |
344 | { |
345 | Lisp_Object val, *args2; | |
32d08644 KH |
346 | |
347 | /* If arguments are supplied, we may have to encode them. */ | |
348 | if (nargs >= 5) | |
349 | { | |
2f221583 | 350 | bool must_encode = 0; |
6e50da0a | 351 | Lisp_Object coding_attrs; |
30d57b8e | 352 | |
e7c1c20e | 353 | for (i = 4; i < nargs; i++) |
b7826503 | 354 | CHECK_STRING (args[i]); |
e7c1c20e | 355 | |
a2286b5c | 356 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
357 | if (STRING_MULTIBYTE (args[i])) |
358 | must_encode = 1; | |
359 | ||
beacaab3 KH |
360 | if (!NILP (Vcoding_system_for_write)) |
361 | val = Vcoding_system_for_write; | |
30d57b8e | 362 | else if (! must_encode) |
fcaf8878 | 363 | val = Qraw_text; |
beacaab3 | 364 | else |
32d08644 | 365 | { |
0065d054 | 366 | SAFE_NALLOCA (args2, 1, nargs + 1); |
32d08644 KH |
367 | args2[0] = Qcall_process; |
368 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 369 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 370 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
32d08644 | 371 | } |
fcaf8878 | 372 | val = complement_process_encoding_system (val); |
32d08644 | 373 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); |
6e50da0a KH |
374 | coding_attrs = CODING_ID_ATTRS (argument_coding.id); |
375 | if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs))) | |
376 | { | |
377 | /* We should not use an ASCII incompatible coding system. */ | |
378 | val = raw_text_coding_system (val); | |
379 | setup_coding_system (val, &argument_coding); | |
380 | } | |
32d08644 | 381 | } |
32d08644 KH |
382 | } |
383 | ||
94fcd171 PE |
384 | if (nargs < 3) |
385 | buffer = Qnil; | |
80856e74 | 386 | else |
e576cab4 | 387 | { |
39eaa782 RS |
388 | buffer = args[2]; |
389 | ||
1ef14cb4 LMI |
390 | /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT |
391 | FILE-FOR-STDERR), unless the first element is :file, in which case see | |
392 | the next paragraph. */ | |
94fcd171 | 393 | if (CONSP (buffer) && !EQ (XCAR (buffer), QCfile)) |
39eaa782 | 394 | { |
70949dac | 395 | if (CONSP (XCDR (buffer))) |
45be8a1e | 396 | { |
a9d4f28a | 397 | Lisp_Object stderr_file; |
70949dac | 398 | stderr_file = XCAR (XCDR (buffer)); |
45be8a1e RS |
399 | |
400 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
401 | error_file = stderr_file; | |
402 | else | |
403 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
404 | } | |
405 | ||
70949dac | 406 | buffer = XCAR (buffer); |
39eaa782 | 407 | } |
044512ed | 408 | |
1ef14cb4 | 409 | /* If the buffer is (still) a list, it might be a (:file "file") spec. */ |
94fcd171 | 410 | if (CONSP (buffer) && EQ (XCAR (buffer), QCfile)) |
1ef14cb4 LMI |
411 | { |
412 | output_file = Fexpand_file_name (XCAR (XCDR (buffer)), | |
413 | BVAR (current_buffer, directory)); | |
414 | CHECK_STRING (output_file); | |
415 | buffer = Qnil; | |
416 | } | |
417 | ||
94fcd171 | 418 | if (! (NILP (buffer) || EQ (buffer, Qt) || INTEGERP (buffer))) |
e576cab4 | 419 | { |
39eaa782 RS |
420 | Lisp_Object spec_buffer; |
421 | spec_buffer = buffer; | |
50fe359b | 422 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
423 | /* Mention the buffer name for a better error message. */ |
424 | if (NILP (buffer)) | |
b7826503 PJ |
425 | CHECK_BUFFER (spec_buffer); |
426 | CHECK_BUFFER (buffer); | |
e576cab4 JB |
427 | } |
428 | } | |
80856e74 | 429 | |
58616e67 JB |
430 | /* Make sure that the child will be able to chdir to the current |
431 | buffer's current directory, or its unhandled equivalent. We | |
432 | can't just have the child check for an error when it does the | |
433 | chdir, since it's in a vfork. | |
434 | ||
435 | We have to GCPRO around this because Fexpand_file_name, | |
436 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
437 | might call a file name handling function. The argument list is | |
438 | protected by the caller, so all we really have to worry about is | |
439 | buffer. */ | |
440 | { | |
94fcd171 | 441 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
58616e67 | 442 | |
c365c355 | 443 | current_dir = encode_current_directory (); |
58616e67 | 444 | |
94fcd171 | 445 | GCPRO4 (buffer, current_dir, error_file, output_file); |
58616e67 | 446 | |
34b87689 KH |
447 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) |
448 | error_file = ENCODE_FILE (error_file); | |
1ef14cb4 LMI |
449 | if (STRINGP (output_file) && STRING_MULTIBYTE (output_file)) |
450 | output_file = ENCODE_FILE (output_file); | |
58616e67 JB |
451 | UNGCPRO; |
452 | } | |
453 | ||
d311d28c | 454 | display_p = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
80856e74 | 455 | |
94fcd171 PE |
456 | for (i = 0; i < CALLPROC_FDS; i++) |
457 | callproc_fd[i] = -1; | |
458 | #ifdef MSDOS | |
459 | synch_process_tempfile = make_number (0); | |
460 | #endif | |
461 | record_unwind_protect_ptr (call_process_kill, callproc_fd); | |
1ef14cb4 | 462 | |
80856e74 | 463 | /* Search for program; barf if not found. */ |
c52b0b34 | 464 | { |
94fcd171 | 465 | struct gcpro gcpro1, gcpro2, gcpro3; |
a773ed9a | 466 | int ok; |
c52b0b34 | 467 | |
94fcd171 | 468 | GCPRO3 (buffer, current_dir, error_file); |
518c40a2 PE |
469 | ok = openp (Vexec_path, args[0], Vexec_suffixes, &path, |
470 | make_number (X_OK), false); | |
c52b0b34 | 471 | UNGCPRO; |
a773ed9a | 472 | if (ok < 0) |
94fcd171 | 473 | report_file_error ("Searching for program", args[0]); |
c52b0b34 | 474 | } |
8ee8f447 RS |
475 | |
476 | /* If program file name starts with /: for quoting a magic name, | |
477 | discard that. */ | |
478 | if (SBYTES (path) > 2 && SREF (path, 0) == '/' | |
479 | && SREF (path, 1) == ':') | |
480 | path = Fsubstring (path, make_number (2), Qnil); | |
481 | ||
98c6f1e3 | 482 | new_argv = SAFE_ALLOCA ((nargs > 4 ? nargs - 2 : 2) * sizeof *new_argv); |
c364e618 | 483 | |
e7c3fb06 | 484 | { |
94fcd171 | 485 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
e7c3fb06 | 486 | |
94fcd171 | 487 | GCPRO4 (buffer, current_dir, path, error_file); |
e7c3fb06 EZ |
488 | if (nargs > 4) |
489 | { | |
490 | ptrdiff_t i; | |
491 | ||
492 | argument_coding.dst_multibyte = 0; | |
493 | for (i = 4; i < nargs; i++) | |
494 | { | |
495 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); | |
496 | if (CODING_REQUIRE_ENCODING (&argument_coding)) | |
497 | /* We must encode this argument. */ | |
498 | args[i] = encode_coding_string (&argument_coding, args[i], 1); | |
499 | } | |
500 | for (i = 4; i < nargs; i++) | |
94fbc901 | 501 | new_argv[i - 3] = SSDATA (args[i]); |
e7c3fb06 EZ |
502 | new_argv[i - 3] = 0; |
503 | } | |
504 | else | |
505 | new_argv[1] = 0; | |
506 | if (STRING_MULTIBYTE (path)) | |
507 | path = ENCODE_FILE (path); | |
94fbc901 | 508 | new_argv[0] = SSDATA (path); |
e7c3fb06 EZ |
509 | UNGCPRO; |
510 | } | |
80856e74 | 511 | |
94fcd171 | 512 | discard_output = INTEGERP (buffer) || (NILP (buffer) && NILP (output_file)); |
7e6c2178 | 513 | |
94fcd171 PE |
514 | #ifdef MSDOS |
515 | if (! discard_output && ! STRINGP (output_file)) | |
7e6c2178 | 516 | { |
94fcd171 PE |
517 | char const *tmpdir = egetenv ("TMPDIR"); |
518 | char const *outf = tmpdir ? tmpdir : ""; | |
519 | tempfile = alloca (strlen (outf) + 20); | |
520 | strcpy (tempfile, outf); | |
e7ac588e | 521 | dostounix_filename (tempfile, 0); |
888c9e86 EZ |
522 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') |
523 | strcat (tempfile, "/"); | |
524 | strcat (tempfile, "detmp.XXX"); | |
525 | mktemp (tempfile); | |
94fcd171 PE |
526 | if (!*tempfile) |
527 | report_file_error ("Opening process output file", Qnil); | |
528 | output_file = build_string (tempfile); | |
529 | synch_process_tempfile = output_file; | |
530 | } | |
531 | #endif | |
532 | ||
533 | if (discard_output) | |
534 | { | |
535 | fd_output = emacs_open (NULL_DEVICE, O_WRONLY, 0); | |
536 | if (fd_output < 0) | |
537 | report_file_error ("Opening null device", Qnil); | |
538 | } | |
539 | else if (STRINGP (output_file)) | |
540 | { | |
541 | fd_output = emacs_open (SSDATA (output_file), | |
542 | O_WRONLY | O_CREAT | O_TRUNC | O_TEXT, | |
543 | default_output_mode); | |
544 | if (fd_output < 0) | |
a773ed9a PE |
545 | { |
546 | int open_errno = errno; | |
94fcd171 | 547 | output_file = DECODE_FILE (output_file); |
a773ed9a | 548 | report_file_errno ("Opening process output file", |
94fcd171 | 549 | output_file, open_errno); |
a773ed9a | 550 | } |
7e6c2178 | 551 | } |
80856e74 JB |
552 | else |
553 | { | |
60aeceb8 | 554 | int fd[2]; |
c7ddc792 | 555 | if (emacs_pipe (fd) != 0) |
94fcd171 PE |
556 | report_file_error ("Creating process pipe", Qnil); |
557 | callproc_fd[CALLPROC_PIPEREAD] = fd[0]; | |
558 | fd_output = fd[1]; | |
80856e74 | 559 | } |
94fcd171 | 560 | callproc_fd[CALLPROC_STDOUT] = fd_output; |
80856e74 | 561 | |
94fcd171 | 562 | fd_error = fd_output; |
80856e74 | 563 | |
94fcd171 PE |
564 | if (STRINGP (error_file) || (NILP (error_file) && !discard_output)) |
565 | { | |
566 | fd_error = emacs_open ((STRINGP (error_file) | |
567 | ? SSDATA (error_file) | |
568 | : NULL_DEVICE), | |
406af475 PE |
569 | O_WRONLY | O_CREAT | O_TRUNC | O_TEXT, |
570 | default_output_mode); | |
94fcd171 PE |
571 | if (fd_error < 0) |
572 | { | |
573 | int open_errno = errno; | |
574 | report_file_errno ("Cannot redirect stderr", | |
575 | (STRINGP (error_file) | |
576 | ? DECODE_FILE (error_file) | |
577 | : build_string (NULL_DEVICE)), | |
578 | open_errno); | |
579 | } | |
580 | callproc_fd[CALLPROC_STDERR] = fd_error; | |
581 | } | |
89e1ec1d | 582 | |
2610078a | 583 | #ifdef MSDOS /* MW, July 1993 */ |
94fcd171 PE |
584 | /* Note that on MSDOS `child_setup' actually returns the child process |
585 | exit status, not its PID, so assign it to status below. */ | |
586 | pid = child_setup (filefd, fd_output, fd_error, new_argv, 0, current_dir); | |
587 | ||
588 | if (pid < 0) | |
589 | { | |
590 | child_errno = errno; | |
591 | unbind_to (count, Qnil); | |
592 | synchronize_system_messages_locale (); | |
593 | return | |
594 | code_convert_string_norecord (build_string (strerror (child_errno)), | |
595 | Vlocale_coding_system, 0); | |
596 | } | |
597 | status = pid; | |
598 | ||
599 | for (i = 0; i < CALLPROC_FDS; i++) | |
600 | if (0 <= callproc_fd[i]) | |
2610078a | 601 | { |
94fcd171 PE |
602 | emacs_close (callproc_fd[i]); |
603 | callproc_fd[i] = -1; | |
2610078a | 604 | } |
94fcd171 PE |
605 | emacs_close (filefd); |
606 | clear_unwind_protect (count - 1); | |
607 | ||
608 | if (tempfile) | |
609 | { | |
610 | /* Since CRLF is converted to LF within `decode_coding', we | |
611 | can always open a file with binary mode. */ | |
612 | callproc_fd[CALLPROC_PIPEREAD] = emacs_open (tempfile, | |
613 | O_RDONLY | O_BINARY, 0); | |
614 | if (callproc_fd[CALLPROC_PIPEREAD] < 0) | |
615 | { | |
616 | int open_errno = errno; | |
617 | report_file_errno ("Cannot re-open temporary file", | |
618 | build_string (tempfile), open_errno); | |
619 | } | |
620 | } | |
621 | ||
644d3f0d | 622 | #endif /* MSDOS */ |
bb5f74ee | 623 | |
94fcd171 PE |
624 | /* Do the unwind-protect now, even though the pid is not known, so |
625 | that no storage allocation is done in the critical section. | |
626 | The actual PID will be filled in during the critical section. */ | |
627 | record_unwind_protect (call_process_cleanup, Fcurrent_buffer ()); | |
644d3f0d | 628 | |
94fcd171 | 629 | #ifndef MSDOS |
bb5f74ee | 630 | |
94fcd171 PE |
631 | block_input (); |
632 | block_child_signal (); | |
bb5f74ee | 633 | |
bad95d8f | 634 | #ifdef WINDOWSNT |
94fcd171 | 635 | pid = child_setup (filefd, fd_output, fd_error, new_argv, 0, current_dir); |
bad95d8f | 636 | #else /* not WINDOWSNT */ |
c0ad4ea5 | 637 | |
94fcd171 PE |
638 | /* vfork, and prevent local vars from being clobbered by the vfork. */ |
639 | { | |
640 | Lisp_Object volatile buffer_volatile = buffer; | |
641 | Lisp_Object volatile coding_systems_volatile = coding_systems; | |
642 | Lisp_Object volatile current_dir_volatile = current_dir; | |
643 | bool volatile display_p_volatile = display_p; | |
644 | bool volatile sa_must_free_volatile = sa_must_free; | |
645 | int volatile fd_error_volatile = fd_error; | |
646 | int volatile filefd_volatile = filefd; | |
647 | ptrdiff_t volatile count_volatile = count; | |
648 | ptrdiff_t volatile sa_count_volatile = sa_count; | |
649 | char **volatile new_argv_volatile = new_argv; | |
650 | int volatile callproc_fd_volatile[CALLPROC_FDS]; | |
651 | for (i = 0; i < CALLPROC_FDS; i++) | |
652 | callproc_fd_volatile[i] = callproc_fd[i]; | |
653 | ||
654 | pid = vfork (); | |
655 | ||
656 | buffer = buffer_volatile; | |
657 | coding_systems = coding_systems_volatile; | |
658 | current_dir = current_dir_volatile; | |
659 | display_p = display_p_volatile; | |
660 | sa_must_free = sa_must_free_volatile; | |
661 | fd_error = fd_error_volatile; | |
662 | filefd = filefd_volatile; | |
663 | count = count_volatile; | |
664 | sa_count = sa_count_volatile; | |
665 | new_argv = new_argv_volatile; | |
666 | ||
667 | for (i = 0; i < CALLPROC_FDS; i++) | |
668 | callproc_fd[i] = callproc_fd_volatile[i]; | |
669 | fd_output = callproc_fd[CALLPROC_STDOUT]; | |
670 | } | |
bb5f74ee | 671 | |
94fcd171 PE |
672 | if (pid == 0) |
673 | { | |
674 | unblock_child_signal (); | |
322aea6d | 675 | |
94fcd171 | 676 | setsid (); |
c0ad4ea5 | 677 | |
94fcd171 PE |
678 | /* Emacs ignores SIGPIPE, but the child should not. */ |
679 | signal (SIGPIPE, SIG_DFL); | |
507a173f AS |
680 | /* Likewise for SIGPROF. */ |
681 | #ifdef SIGPROF | |
682 | signal (SIGPROF, SIG_DFL); | |
683 | #endif | |
c0ad4ea5 | 684 | |
94fcd171 PE |
685 | child_setup (filefd, fd_output, fd_error, new_argv, 0, current_dir); |
686 | } | |
aba637ec | 687 | |
bad95d8f | 688 | #endif /* not WINDOWSNT */ |
cd5f8f60 | 689 | |
94fcd171 | 690 | child_errno = errno; |
bb5f74ee | 691 | |
94fcd171 | 692 | if (pid > 0) |
4a88129a PE |
693 | { |
694 | synch_process_pid = pid; | |
695 | ||
696 | if (INTEGERP (buffer)) | |
697 | { | |
698 | if (tempfile_index < 0) | |
699 | record_deleted_pid (pid, Qnil); | |
700 | else | |
701 | { | |
702 | eassert (1 < nargs); | |
703 | record_deleted_pid (pid, args[1]); | |
704 | clear_unwind_protect (tempfile_index); | |
705 | } | |
706 | synch_process_pid = 0; | |
707 | } | |
708 | } | |
bb5f74ee | 709 | |
94fcd171 PE |
710 | unblock_child_signal (); |
711 | unblock_input (); | |
bb5f74ee | 712 | |
2610078a | 713 | #endif /* not MSDOS */ |
80856e74 | 714 | |
80856e74 | 715 | if (pid < 0) |
a773ed9a | 716 | report_file_errno ("Doing vfork", Qnil, child_errno); |
80856e74 | 717 | |
94fcd171 PE |
718 | /* Close our file descriptors, except for callproc_fd[CALLPROC_PIPEREAD] |
719 | since we will use that to read input from. */ | |
720 | for (i = 0; i < CALLPROC_FDS; i++) | |
721 | if (i != CALLPROC_PIPEREAD && 0 <= callproc_fd[i]) | |
722 | { | |
723 | emacs_close (callproc_fd[i]); | |
724 | callproc_fd[i] = -1; | |
725 | } | |
726 | emacs_close (filefd); | |
727 | clear_unwind_protect (count - 1); | |
728 | ||
d50d3dc8 | 729 | if (INTEGERP (buffer)) |
644d3f0d | 730 | return unbind_to (count, Qnil); |
80856e74 | 731 | |
d50d3dc8 | 732 | if (BUFFERP (buffer)) |
80856e74 JB |
733 | Fset_buffer (buffer); |
734 | ||
94fcd171 PE |
735 | fd0 = callproc_fd[CALLPROC_PIPEREAD]; |
736 | ||
737 | if (0 <= fd0) | |
09494912 RS |
738 | { |
739 | Lisp_Object val, *args2; | |
740 | ||
741 | val = Qnil; | |
742 | if (!NILP (Vcoding_system_for_read)) | |
743 | val = Vcoding_system_for_read; | |
744 | else | |
745 | { | |
746 | if (EQ (coding_systems, Qt)) | |
747 | { | |
f66c7cf8 | 748 | ptrdiff_t i; |
09494912 | 749 | |
0065d054 | 750 | SAFE_NALLOCA (args2, 1, nargs + 1); |
09494912 RS |
751 | args2[0] = Qcall_process; |
752 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
753 | coding_systems | |
754 | = Ffind_operation_coding_system (nargs + 1, args2); | |
755 | } | |
756 | if (CONSP (coding_systems)) | |
70949dac | 757 | val = XCAR (coding_systems); |
09494912 | 758 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 759 | val = XCAR (Vdefault_process_coding_system); |
09494912 RS |
760 | else |
761 | val = Qnil; | |
762 | } | |
91183bfd | 763 | Fcheck_coding_system (val); |
09494912 RS |
764 | /* In unibyte mode, character code conversion should not take |
765 | place but EOL conversion should. So, setup raw-text or one | |
766 | of the subsidiary according to the information just setup. */ | |
4b4deea2 | 767 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
09494912 | 768 | && !NILP (val)) |
91183bfd KH |
769 | val = raw_text_coding_system (val); |
770 | setup_coding_system (val, &process_coding); | |
659afede KH |
771 | process_coding.dst_multibyte |
772 | = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); | |
94fcd171 | 773 | process_coding.src_multibyte = 0; |
09494912 RS |
774 | } |
775 | ||
80856e74 JB |
776 | immediate_quit = 1; |
777 | QUIT; | |
778 | ||
94fcd171 | 779 | if (0 <= fd0) |
19ed11ba | 780 | { |
60aeceb8 PE |
781 | enum { CALLPROC_BUFFER_SIZE_MIN = 16 * 1024 }; |
782 | enum { CALLPROC_BUFFER_SIZE_MAX = 4 * CALLPROC_BUFFER_SIZE_MIN }; | |
783 | char buf[CALLPROC_BUFFER_SIZE_MAX]; | |
784 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; | |
2f221583 | 785 | int nread; |
19ed11ba AS |
786 | EMACS_INT total_read = 0; |
787 | int carryover = 0; | |
2f221583 | 788 | bool display_on_the_fly = display_p; |
94fcd171 | 789 | struct coding_system saved_coding = process_coding; |
19ed11ba | 790 | |
19ed11ba AS |
791 | while (1) |
792 | { | |
793 | /* Repeatedly read until we've filled as much as possible | |
794 | of the buffer size we have. But don't read | |
795 | less than 1024--save that for the next bufferful. */ | |
796 | nread = carryover; | |
797 | while (nread < bufsize - 1024) | |
798 | { | |
60aeceb8 | 799 | int this_read = emacs_read (fd0, buf + nread, |
19ed11ba | 800 | bufsize - nread); |
60558b19 | 801 | |
19ed11ba AS |
802 | if (this_read < 0) |
803 | goto give_up; | |
60558b19 | 804 | |
19ed11ba AS |
805 | if (this_read == 0) |
806 | { | |
807 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
808 | break; | |
809 | } | |
60558b19 | 810 | |
19ed11ba AS |
811 | nread += this_read; |
812 | total_read += this_read; | |
60558b19 | 813 | |
19ed11ba AS |
814 | if (display_on_the_fly) |
815 | break; | |
816 | } | |
60558b19 | 817 | |
19ed11ba AS |
818 | /* Now NREAD is the total amount of data in the buffer. */ |
819 | immediate_quit = 0; | |
177c0ea7 | 820 | |
94fcd171 PE |
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; | |
827 | ptrdiff_t count1 = SPECPDL_INDEX (); | |
828 | ||
829 | XSETBUFFER (curbuf, current_buffer); | |
d57f4dde | 830 | prepare_to_modify_buffer (PT, PT, NULL); |
94fcd171 PE |
831 | /* We cannot allow after-change-functions be run |
832 | during decoding, because that might modify the | |
833 | buffer, while we rely on process_coding.produced to | |
834 | faithfully reflect inserted text until we | |
835 | TEMP_SET_PT_BOTH below. */ | |
836 | specbind (Qinhibit_modification_hooks, Qt); | |
837 | decode_coding_c_string (&process_coding, | |
838 | (unsigned char *) buf, nread, curbuf); | |
839 | unbind_to (count1, Qnil); | |
840 | if (display_on_the_fly | |
841 | && CODING_REQUIRE_DETECTION (&saved_coding) | |
842 | && ! CODING_REQUIRE_DETECTION (&process_coding)) | |
843 | { | |
844 | /* We have detected some coding system, but the | |
845 | detection may have been via insufficient data. | |
846 | So give up 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), | |
854 | 0); | |
855 | display_on_the_fly = 0; | |
856 | process_coding = saved_coding; | |
857 | carryover = nread; | |
858 | /* Make the above condition always fail in the future. */ | |
859 | saved_coding.common_flags | |
860 | &= ~CODING_REQUIRE_DETECTION_MASK; | |
861 | continue; | |
19ed11ba | 862 | } |
94fcd171 PE |
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); | |
19ed11ba | 870 | } |
c5bfa12b | 871 | |
19ed11ba AS |
872 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
873 | break; | |
6e3bfbb2 | 874 | |
19ed11ba AS |
875 | /* Make the buffer bigger as we continue to read more data, |
876 | but not past CALLPROC_BUFFER_SIZE_MAX. */ | |
877 | if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) | |
878 | if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) | |
879 | bufsize = CALLPROC_BUFFER_SIZE_MAX; | |
6e3bfbb2 | 880 | |
19ed11ba AS |
881 | if (display_p) |
882 | { | |
19ed11ba AS |
883 | redisplay_preserve_echo_area (1); |
884 | /* This variable might have been set to 0 for code | |
94fcd171 | 885 | detection. In that case, set it back to 1 because |
19ed11ba AS |
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. */ |
94fcd171 | 904 | wait_for_termination (pid, &status, fd0 < 0); |
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 |
bafe80ce PE |
934 | /* Create a temporary file suitable for storing the input data of |
935 | call-process-region. NARGS and ARGS are the same as for | |
94fcd171 PE |
936 | call-process-region. Store into *FILENAME_STRING_PTR a Lisp string |
937 | naming the file, and return a file descriptor for reading. | |
938 | Unwind-protect the file, so that the file descriptor will be closed | |
939 | and the file removed when the caller unwinds the specpdl stack. */ | |
fdb82f93 | 940 | |
94fcd171 PE |
941 | static int |
942 | create_temp_file (ptrdiff_t nargs, Lisp_Object *args, | |
943 | Lisp_Object *filename_string_ptr) | |
80856e74 | 944 | { |
94fcd171 | 945 | int fd; |
39323a7e KH |
946 | struct gcpro gcpro1; |
947 | Lisp_Object filename_string; | |
bafe80ce | 948 | Lisp_Object val, start, end; |
98c6f1e3 | 949 | Lisp_Object tmpdir; |
7e6c2178 | 950 | |
f92d51d8 CY |
951 | if (STRINGP (Vtemporary_file_directory)) |
952 | tmpdir = Vtemporary_file_directory; | |
7e6c2178 RS |
953 | else |
954 | { | |
83be8524 | 955 | char *outf; |
f92d51d8 | 956 | #ifndef DOS_NT |
83be8524 PE |
957 | outf = getenv ("TMPDIR"); |
958 | tmpdir = build_string (outf ? outf : "/tmp/"); | |
f92d51d8 | 959 | #else /* DOS_NT */ |
f92d51d8 CY |
960 | if ((outf = egetenv ("TMPDIR")) |
961 | || (outf = egetenv ("TMP")) | |
962 | || (outf = egetenv ("TEMP"))) | |
963 | tmpdir = build_string (outf); | |
964 | else | |
965 | tmpdir = Ffile_name_as_directory (build_string ("c:/temp")); | |
0774fcf8 | 966 | #endif |
f92d51d8 | 967 | } |
7e6c2178 | 968 | |
3c59b4c9 | 969 | { |
98c6f1e3 | 970 | Lisp_Object pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir); |
74ba1583 | 971 | char *tempfile; |
94fcd171 | 972 | ptrdiff_t count; |
74ba1583 EZ |
973 | |
974 | #ifdef WINDOWSNT | |
975 | /* Cannot use the result of Fexpand_file_name, because it | |
976 | downcases the XXXXXX part of the pattern, and mktemp then | |
977 | doesn't recognize it. */ | |
978 | if (!NILP (Vw32_downcase_file_names)) | |
979 | { | |
980 | Lisp_Object dirname = Ffile_name_directory (pattern); | |
981 | ||
982 | if (NILP (dirname)) | |
983 | pattern = Vtemp_file_name_pattern; | |
984 | else | |
985 | pattern = concat2 (dirname, Vtemp_file_name_pattern); | |
986 | } | |
987 | #endif | |
988 | ||
bafe80ce PE |
989 | filename_string = Fcopy_sequence (ENCODE_FILE (pattern)); |
990 | GCPRO1 (filename_string); | |
991 | tempfile = SSDATA (filename_string); | |
09494912 | 992 | |
94fcd171 PE |
993 | count = SPECPDL_INDEX (); |
994 | record_unwind_protect_nothing (); | |
995 | fd = mkostemp (tempfile, O_CLOEXEC); | |
996 | if (fd < 0) | |
997 | report_file_error ("Failed to open temporary file using pattern", | |
998 | pattern); | |
999 | set_unwind_protect (count, delete_temp_file, filename_string); | |
1000 | record_unwind_protect_int (close_file_unwind, fd); | |
3c59b4c9 PE |
1001 | } |
1002 | ||
80856e74 JB |
1003 | start = args[0]; |
1004 | end = args[1]; | |
32d08644 | 1005 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
1006 | if (!NILP (Vcoding_system_for_write)) |
1007 | val = Vcoding_system_for_write; | |
4b4deea2 | 1008 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
fcaf8878 | 1009 | val = Qraw_text; |
32d08644 | 1010 | else |
beacaab3 | 1011 | { |
bafe80ce PE |
1012 | Lisp_Object coding_systems; |
1013 | Lisp_Object *args2; | |
3c59b4c9 | 1014 | USE_SAFE_ALLOCA; |
0065d054 | 1015 | SAFE_NALLOCA (args2, 1, nargs + 1); |
91489411 | 1016 | args2[0] = Qcall_process_region; |
bafe80ce | 1017 | memcpy (args2 + 1, args, nargs * sizeof *args); |
91489411 | 1018 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 1019 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
3c59b4c9 | 1020 | SAFE_FREE (); |
beacaab3 | 1021 | } |
fcaf8878 | 1022 | val = complement_process_encoding_system (val); |
32d08644 | 1023 | |
168afdaa | 1024 | { |
d311d28c | 1025 | ptrdiff_t count1 = SPECPDL_INDEX (); |
168afdaa RS |
1026 | |
1027 | specbind (intern ("coding-system-for-write"), val); | |
bb951f0e KR |
1028 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
1029 | happen to get a ".Z" suffix. */ | |
1030 | specbind (intern ("file-name-handler-alist"), Qnil); | |
94fcd171 | 1031 | write_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil, fd); |
168afdaa RS |
1032 | |
1033 | unbind_to (count1, Qnil); | |
1034 | } | |
91489411 | 1035 | |
94fcd171 PE |
1036 | if (lseek (fd, 0, SEEK_SET) < 0) |
1037 | report_file_error ("Setting file position", filename_string); | |
1038 | ||
177c0ea7 | 1039 | /* Note that Fcall_process takes care of binding |
91489411 | 1040 | coding-system-for-read. */ |
093650fe | 1041 | |
94fcd171 PE |
1042 | *filename_string_ptr = filename_string; |
1043 | UNGCPRO; | |
1044 | return fd; | |
bafe80ce PE |
1045 | } |
1046 | ||
1047 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
1048 | 3, MANY, 0, | |
1049 | doc: /* Send text from START to END to a synchronous process running PROGRAM. | |
1050 | The remaining arguments are optional. | |
1051 | Delete the text if fourth arg DELETE is non-nil. | |
1052 | ||
1053 | Insert output in BUFFER before point; t means current buffer; nil for | |
1054 | BUFFER means discard it; 0 means discard and don't wait; and `(:file | |
1055 | FILE)', where FILE is a file name string, means that it should be | |
1056 | written to that file (if the file already exists it is overwritten). | |
1057 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, | |
1058 | REAL-BUFFER says what to do with standard output, as above, | |
1059 | while STDERR-FILE says what to do with standard error in the child. | |
1060 | STDERR-FILE may be nil (discard standard error output), | |
1061 | t (mix it with ordinary output), or a file name string. | |
1062 | ||
1063 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
1064 | Remaining args are passed to PROGRAM at startup as command args. | |
1065 | ||
1066 | If BUFFER is 0, `call-process-region' returns immediately with value nil. | |
1067 | Otherwise it waits for PROGRAM to terminate | |
1068 | and returns a numeric exit status or a signal description string. | |
1069 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. | |
1070 | ||
1071 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) | |
1072 | (ptrdiff_t nargs, Lisp_Object *args) | |
1073 | { | |
4a88129a | 1074 | struct gcpro gcpro1; |
94fcd171 | 1075 | Lisp_Object infile, val; |
bafe80ce PE |
1076 | ptrdiff_t count = SPECPDL_INDEX (); |
1077 | Lisp_Object start = args[0]; | |
1078 | Lisp_Object end = args[1]; | |
1079 | bool empty_input; | |
94fcd171 | 1080 | int fd; |
bafe80ce PE |
1081 | |
1082 | if (STRINGP (start)) | |
1083 | empty_input = SCHARS (start) == 0; | |
1084 | else if (NILP (start)) | |
1085 | empty_input = BEG == Z; | |
1086 | else | |
1087 | { | |
1088 | validate_region (&args[0], &args[1]); | |
1089 | start = args[0]; | |
1090 | end = args[1]; | |
1091 | empty_input = XINT (start) == XINT (end); | |
1092 | } | |
1093 | ||
94fcd171 PE |
1094 | if (!empty_input) |
1095 | fd = create_temp_file (nargs, args, &infile); | |
1096 | else | |
1097 | { | |
1098 | infile = Qnil; | |
1099 | fd = emacs_open (NULL_DEVICE, O_RDONLY, 0); | |
1100 | if (fd < 0) | |
1101 | report_file_error ("Opening null device", Qnil); | |
1102 | record_unwind_protect_int (close_file_unwind, fd); | |
1103 | } | |
1104 | ||
4a88129a | 1105 | GCPRO1 (infile); |
80856e74 | 1106 | |
edf496dd | 1107 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
1108 | Fdelete_region (start, end); |
1109 | ||
edf496dd KH |
1110 | if (nargs > 3) |
1111 | { | |
1112 | args += 2; | |
1113 | nargs -= 2; | |
1114 | } | |
1115 | else | |
1116 | { | |
1117 | args[0] = args[2]; | |
1118 | nargs = 2; | |
1119 | } | |
50a30cce | 1120 | args[1] = infile; |
80856e74 | 1121 | |
4a88129a | 1122 | val = call_process (nargs, args, fd, empty_input ? -1 : count); |
94fcd171 | 1123 | RETURN_UNGCPRO (unbind_to (count, val)); |
80856e74 JB |
1124 | } |
1125 | \f | |
361358ea | 1126 | #ifndef WINDOWSNT |
971de7fb | 1127 | static int relocate_fd (int fd, int minfd); |
361358ea | 1128 | #endif |
dfcf069d | 1129 | |
5990851d KL |
1130 | static char ** |
1131 | add_env (char **env, char **new_env, char *string) | |
1132 | { | |
1133 | char **ep; | |
2f221583 | 1134 | bool ok = 1; |
5990851d KL |
1135 | if (string == NULL) |
1136 | return new_env; | |
1137 | ||
1138 | /* See if this string duplicates any string already in the env. | |
1139 | If so, don't put it in. | |
1140 | When an env var has multiple definitions, | |
1141 | we keep the definition that comes first in process-environment. */ | |
1142 | for (ep = env; ok && ep != new_env; ep++) | |
1143 | { | |
1144 | char *p = *ep, *q = string; | |
1145 | while (ok) | |
19ed11ba AS |
1146 | { |
1147 | if (*q != *p) | |
1148 | break; | |
1149 | if (*q == 0) | |
1150 | /* The string is a lone variable name; keep it for now, we | |
1151 | will remove it later. It is a placeholder for a | |
1152 | variable that is not to be included in the environment. */ | |
1153 | break; | |
1154 | if (*q == '=') | |
1155 | ok = 0; | |
1156 | p++, q++; | |
1157 | } | |
5990851d KL |
1158 | } |
1159 | if (ok) | |
1160 | *new_env++ = string; | |
1161 | return new_env; | |
1162 | } | |
1163 | ||
80856e74 JB |
1164 | /* This is the last thing run in a newly forked inferior |
1165 | either synchronous or asynchronous. | |
1166 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
1167 | Initialize inferior's priority, pgrp, connected dir and environment. | |
1168 | then exec another program based on new_argv. | |
1169 | ||
2f221583 | 1170 | If SET_PGRP, put the subprocess into a separate process group. |
e576cab4 JB |
1171 | |
1172 | CURRENT_DIR is an elisp string giving the path of the current | |
1173 | directory the subprocess should have. Since we can't really signal | |
1174 | a decent error from within the child, this should be verified as an | |
1175 | executable directory by the parent. */ | |
80856e74 | 1176 | |
dfcf069d | 1177 | int |
2f221583 PE |
1178 | child_setup (int in, int out, int err, char **new_argv, bool set_pgrp, |
1179 | Lisp_Object current_dir) | |
80856e74 | 1180 | { |
e576cab4 | 1181 | char **env; |
7fcf7f05 | 1182 | char *pwd_var; |
bad95d8f RS |
1183 | #ifdef WINDOWSNT |
1184 | int cpid; | |
4252a4bd | 1185 | HANDLE handles[3]; |
afacaa1b JB |
1186 | #else |
1187 | int exec_errno; | |
e576cab4 | 1188 | |
d311d28c | 1189 | pid_t pid = getpid (); |
afacaa1b | 1190 | #endif /* WINDOWSNT */ |
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 | { |
c365c355 PE |
1199 | char *temp; |
1200 | ptrdiff_t i; | |
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. */ | |
c365c355 | 1207 | pwd_var = xmalloc (i + 5); |
16425c4a | 1208 | #else |
c365c355 | 1209 | pwd_var = alloca (i + 5); |
16425c4a | 1210 | #endif |
7fcf7f05 | 1211 | temp = pwd_var + 4; |
72af86bd | 1212 | memcpy (pwd_var, "PWD=", 4); |
c365c355 | 1213 | strcpy (temp, SSDATA (current_dir)); |
e576cab4 | 1214 | |
c17c4250 | 1215 | #ifndef DOS_NT |
e576cab4 JB |
1216 | /* We can't signal an Elisp error here; we're in a vfork. Since |
1217 | the callers check the current directory before forking, this | |
1218 | should only return an error if the directory's permissions | |
1219 | are changed between the check and this chdir, but we should | |
1220 | at least check. */ | |
1221 | if (chdir (temp) < 0) | |
4ebbdd67 | 1222 | _exit (EXIT_CANCELED); |
f8d23104 | 1223 | #else /* DOS_NT */ |
c17c4250 EZ |
1224 | /* Get past the drive letter, so that d:/ is left alone. */ |
1225 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
1226 | { | |
1227 | temp += 2; | |
1228 | i -= 2; | |
1229 | } | |
f8d23104 | 1230 | #endif /* DOS_NT */ |
c17c4250 | 1231 | |
7fcf7f05 | 1232 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 1233 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 1234 | temp[--i] = 0; |
e576cab4 | 1235 | } |
80856e74 | 1236 | |
5990851d | 1237 | /* Set `env' to a vector of the strings in the environment. */ |
80856e74 JB |
1238 | { |
1239 | register Lisp_Object tem; | |
1240 | register char **new_env; | |
5990851d | 1241 | char **p, **q; |
80856e74 | 1242 | register int new_length; |
d2bb6598 | 1243 | Lisp_Object display = Qnil; |
361358ea | 1244 | |
80856e74 | 1245 | new_length = 0; |
f105f403 | 1246 | |
80856e74 | 1247 | for (tem = Vprocess_environment; |
19ed11ba AS |
1248 | CONSP (tem) && STRINGP (XCAR (tem)); |
1249 | tem = XCDR (tem)) | |
d2bb6598 | 1250 | { |
42a5b22f | 1251 | if (strncmp (SSDATA (XCAR (tem)), "DISPLAY", 7) == 0 |
d2bb6598 SM |
1252 | && (SDATA (XCAR (tem)) [7] == '\0' |
1253 | || SDATA (XCAR (tem)) [7] == '=')) | |
1254 | /* DISPLAY is specified in process-environment. */ | |
1255 | display = Qt; | |
1256 | new_length++; | |
1257 | } | |
de87fb59 | 1258 | |
d2bb6598 SM |
1259 | /* If not provided yet, use the frame's DISPLAY. */ |
1260 | if (NILP (display)) | |
1261 | { | |
1262 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); | |
1263 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) | |
1264 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1265 | tmp = Fgetenv_internal (build_string ("DISPLAY"), | |
1266 | Vinitial_environment); | |
1267 | if (STRINGP (tmp)) | |
1268 | { | |
1269 | display = tmp; | |
1270 | new_length++; | |
1271 | } | |
1272 | } | |
80856e74 | 1273 | |
7fcf7f05 | 1274 | /* new_length + 2 to include PWD and terminating 0. */ |
38182d90 | 1275 | env = new_env = alloca ((new_length + 2) * sizeof *env); |
7fcf7f05 RS |
1276 | /* If we have a PWD envvar, pass one down, |
1277 | but with corrected value. */ | |
a13f8f50 | 1278 | if (egetenv ("PWD")) |
7fcf7f05 | 1279 | *new_env++ = pwd_var; |
361358ea | 1280 | |
6b8e474c | 1281 | if (STRINGP (display)) |
de87fb59 | 1282 | { |
38182d90 | 1283 | char *vdata = alloca (sizeof "DISPLAY=" + SBYTES (display)); |
de87fb59 | 1284 | strcpy (vdata, "DISPLAY="); |
42a5b22f | 1285 | strcat (vdata, SSDATA (display)); |
de87fb59 DN |
1286 | new_env = add_env (env, new_env, vdata); |
1287 | } | |
80856e74 | 1288 | |
5990851d | 1289 | /* Overrides. */ |
80856e74 | 1290 | for (tem = Vprocess_environment; |
70949dac KR |
1291 | CONSP (tem) && STRINGP (XCAR (tem)); |
1292 | tem = XCDR (tem)) | |
42a5b22f | 1293 | new_env = add_env (env, new_env, SSDATA (XCAR (tem))); |
d2bb6598 | 1294 | |
5990851d KL |
1295 | *new_env = 0; |
1296 | ||
1297 | /* Remove variable names without values. */ | |
1298 | p = q = env; | |
1299 | while (*p != 0) | |
cd9565ba | 1300 | { |
19ed11ba AS |
1301 | while (*q != 0 && strchr (*q, '=') == NULL) |
1302 | q++; | |
1303 | *p = *q++; | |
1304 | if (*p != 0) | |
1305 | p++; | |
cd9565ba | 1306 | } |
80856e74 | 1307 | } |
de87fb59 | 1308 | |
361358ea | 1309 | |
bad95d8f RS |
1310 | #ifdef WINDOWSNT |
1311 | prepare_standard_handles (in, out, err, handles); | |
d5db4077 | 1312 | set_process_dir (SDATA (current_dir)); |
d3d14b40 | 1313 | /* Spawn the child. (See w32proc.c:sys_spawnve). */ |
67802943 DN |
1314 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); |
1315 | reset_standard_handles (in, out, err, handles); | |
1316 | if (cpid == -1) | |
1317 | /* An error occurred while trying to spawn the process. */ | |
1318 | report_file_error ("Spawning child process", Qnil); | |
1319 | return cpid; | |
1320 | ||
bad95d8f | 1321 | #else /* not WINDOWSNT */ |
426b37ae JB |
1322 | /* Make sure that in, out, and err are not actually already in |
1323 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1324 | started with its standard in, out, or error closed, as might |
426b37ae | 1325 | happen under X. */ |
f29f9e4a RS |
1326 | { |
1327 | int oin = in, oout = out; | |
1328 | ||
1329 | /* We have to avoid relocating the same descriptor twice! */ | |
1330 | ||
1331 | in = relocate_fd (in, 3); | |
1332 | ||
1333 | if (out == oin) | |
1334 | out = in; | |
1335 | else | |
3e9367e7 | 1336 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1337 | |
1338 | if (err == oin) | |
1339 | err = in; | |
1340 | else if (err == oout) | |
1341 | err = out; | |
1342 | else | |
3e9367e7 | 1343 | err = relocate_fd (err, 3); |
f29f9e4a | 1344 | } |
426b37ae | 1345 | |
c17c4250 | 1346 | #ifndef MSDOS |
4700b5a5 PE |
1347 | /* Redirect file descriptors and clear the close-on-exec flag on the |
1348 | redirected ones. IN, OUT, and ERR are close-on-exec so they | |
1349 | need not be closed explicitly. */ | |
80856e74 JB |
1350 | dup2 (in, 0); |
1351 | dup2 (out, 1); | |
1352 | dup2 (err, 2); | |
067428c1 | 1353 | |
dd0333b6 | 1354 | setpgid (0, 0); |
12e610e8 | 1355 | tcsetpgrp (0, pid); |
a7ebc409 | 1356 | |
21e54a94 | 1357 | execve (new_argv[0], new_argv, env); |
ee010797 | 1358 | exec_errno = errno; |
80856e74 | 1359 | |
ee010797 PE |
1360 | /* Avoid deadlock if the child's perror writes to a full pipe; the |
1361 | pipe's reader is the parent, but with vfork the parent can't | |
1362 | run until the child exits. Truncate the diagnostic instead. */ | |
1363 | fcntl (STDERR_FILENO, F_SETFL, O_NONBLOCK); | |
4ebbdd67 | 1364 | |
ee010797 PE |
1365 | errno = exec_errno; |
1366 | emacs_perror (new_argv[0]); | |
1367 | _exit (exec_errno == ENOENT ? EXIT_ENOENT : EXIT_CANNOT_INVOKE); | |
67802943 DN |
1368 | |
1369 | #else /* MSDOS */ | |
1370 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
1371 | xfree (pwd_var); | |
1372 | if (pid == -1) | |
1373 | /* An error occurred while trying to run the subprocess. */ | |
1374 | report_file_error ("Spawning child process", Qnil); | |
1375 | return pid; | |
1376 | #endif /* MSDOS */ | |
ae76d9e1 | 1377 | #endif /* not WINDOWSNT */ |
80856e74 JB |
1378 | } |
1379 | ||
361358ea | 1380 | #ifndef WINDOWSNT |
a3833dfe | 1381 | /* Move the file descriptor FD so that its number is not less than MINFD. |
4700b5a5 PE |
1382 | If the file descriptor is moved at all, the original is closed on MSDOS, |
1383 | but not elsewhere as the caller will close it anyway. */ | |
dfcf069d | 1384 | static int |
971de7fb | 1385 | relocate_fd (int fd, int minfd) |
426b37ae | 1386 | { |
a3833dfe | 1387 | if (fd >= minfd) |
426b37ae JB |
1388 | return fd; |
1389 | else | |
1390 | { | |
067428c1 | 1391 | int new = fcntl (fd, F_DUPFD_CLOEXEC, minfd); |
426b37ae JB |
1392 | if (new == -1) |
1393 | { | |
4ebbdd67 PE |
1394 | emacs_perror ("while setting up child"); |
1395 | _exit (EXIT_CANCELED); | |
426b37ae | 1396 | } |
4700b5a5 | 1397 | #ifdef MSDOS |
68c45bf0 | 1398 | emacs_close (fd); |
4700b5a5 | 1399 | #endif |
426b37ae JB |
1400 | return new; |
1401 | } | |
1402 | } | |
361358ea | 1403 | #endif /* not WINDOWSNT */ |
426b37ae | 1404 | |
2f221583 | 1405 | static bool |
989f33ba PE |
1406 | getenv_internal_1 (const char *var, ptrdiff_t varlen, char **value, |
1407 | ptrdiff_t *valuelen, Lisp_Object env) | |
012c6fcb | 1408 | { |
db699fc6 | 1409 | for (; CONSP (env); env = XCDR (env)) |
012c6fcb | 1410 | { |
db699fc6 | 1411 | Lisp_Object entry = XCAR (env); |
d50d3dc8 | 1412 | if (STRINGP (entry) |
db699fc6 | 1413 | && SBYTES (entry) >= varlen |
bad95d8f RS |
1414 | #ifdef WINDOWSNT |
1415 | /* NT environment variables are case insensitive. */ | |
d5db4077 | 1416 | && ! strnicmp (SDATA (entry), var, varlen) |
bad95d8f | 1417 | #else /* not WINDOWSNT */ |
72af86bd | 1418 | && ! memcmp (SDATA (entry), var, varlen) |
bad95d8f | 1419 | #endif /* not WINDOWSNT */ |
a9971c6d | 1420 | ) |
012c6fcb | 1421 | { |
db699fc6 SM |
1422 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') |
1423 | { | |
51b59d79 | 1424 | *value = SSDATA (entry) + (varlen + 1); |
db699fc6 SM |
1425 | *valuelen = SBYTES (entry) - (varlen + 1); |
1426 | return 1; | |
1427 | } | |
1428 | else if (SBYTES (entry) == varlen) | |
1429 | { | |
1430 | /* Lone variable names in Vprocess_environment mean that | |
1431 | variable should be removed from the environment. */ | |
1432 | *value = NULL; | |
1433 | return 1; | |
1434 | } | |
1435 | } | |
1436 | } | |
1437 | return 0; | |
1438 | } | |
1439 | ||
2f221583 | 1440 | static bool |
989f33ba PE |
1441 | getenv_internal (const char *var, ptrdiff_t varlen, char **value, |
1442 | ptrdiff_t *valuelen, Lisp_Object frame) | |
012c6fcb | 1443 | { |
d2bb6598 SM |
1444 | /* Try to find VAR in Vprocess_environment first. */ |
1445 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1446 | Vprocess_environment)) | |
1447 | return *value ? 1 : 0; | |
f105f403 | 1448 | |
d2bb6598 | 1449 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
de87fb59 | 1450 | if (strcmp (var, "DISPLAY") == 0) |
d2bb6598 SM |
1451 | { |
1452 | Lisp_Object display | |
1453 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); | |
1454 | if (STRINGP (display)) | |
1455 | { | |
51b59d79 | 1456 | *value = SSDATA (display); |
de87fb59 | 1457 | *valuelen = SBYTES (display); |
012c6fcb JA |
1458 | return 1; |
1459 | } | |
d2bb6598 SM |
1460 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
1461 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1462 | Vinitial_environment)) | |
1463 | return *value ? 1 : 0; | |
012c6fcb JA |
1464 | } |
1465 | ||
1466 | return 0; | |
1467 | } | |
1468 | ||
f105f403 | 1469 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
5990851d KL |
1470 | doc: /* Get the value of environment variable VARIABLE. |
1471 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
1472 | the environment. Otherwise, value is a string. | |
f105f403 | 1473 | |
acf20901 | 1474 | This function searches `process-environment' for VARIABLE. |
5990851d | 1475 | |
db699fc6 | 1476 | If optional parameter ENV is a list, then search this list instead of |
acf20901 JB |
1477 | `process-environment', and return t when encountering a negative entry |
1478 | \(an entry for a variable with no value). */) | |
5842a27b | 1479 | (Lisp_Object variable, Lisp_Object env) |
012c6fcb JA |
1480 | { |
1481 | char *value; | |
989f33ba | 1482 | ptrdiff_t valuelen; |
012c6fcb | 1483 | |
5990851d | 1484 | CHECK_STRING (variable); |
db699fc6 SM |
1485 | if (CONSP (env)) |
1486 | { | |
42a5b22f | 1487 | if (getenv_internal_1 (SSDATA (variable), SBYTES (variable), |
db699fc6 SM |
1488 | &value, &valuelen, env)) |
1489 | return value ? make_string (value, valuelen) : Qt; | |
1490 | else | |
1491 | return Qnil; | |
1492 | } | |
42a5b22f | 1493 | else if (getenv_internal (SSDATA (variable), SBYTES (variable), |
d2bb6598 | 1494 | &value, &valuelen, env)) |
012c6fcb JA |
1495 | return make_string (value, valuelen); |
1496 | else | |
1497 | return Qnil; | |
1498 | } | |
1499 | ||
5990851d KL |
1500 | /* A version of getenv that consults the Lisp environment lists, |
1501 | easily callable from C. */ | |
012c6fcb | 1502 | char * |
a8fe7202 | 1503 | egetenv (const char *var) |
012c6fcb JA |
1504 | { |
1505 | char *value; | |
25c7e41f | 1506 | ptrdiff_t valuelen; |
012c6fcb | 1507 | |
f105f403 | 1508 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
012c6fcb JA |
1509 | return value; |
1510 | else | |
1511 | return 0; | |
1512 | } | |
1513 | ||
80856e74 | 1514 | \f |
8de15d69 | 1515 | /* This is run before init_cmdargs. */ |
177c0ea7 | 1516 | |
dfcf069d | 1517 | void |
971de7fb | 1518 | init_callproc_1 (void) |
8de15d69 | 1519 | { |
d01ba2f1 GM |
1520 | #ifdef HAVE_NS |
1521 | const char *etc_dir = ns_etc_directory (); | |
cbb31951 | 1522 | const char *path_exec = ns_exec_path (); |
d01ba2f1 | 1523 | #endif |
35a2f4b8 | 1524 | |
76151e2c | 1525 | Vdata_directory = decode_env_path ("EMACSDATA", |
d01ba2f1 | 1526 | #ifdef HAVE_NS |
76151e2c | 1527 | etc_dir ? etc_dir : |
d01ba2f1 | 1528 | #endif |
17e0445b | 1529 | PATH_DATA, 0); |
76151e2c EZ |
1530 | Vdata_directory = Ffile_name_as_directory (Fcar (Vdata_directory)); |
1531 | ||
1532 | Vdoc_directory = decode_env_path ("EMACSDOC", | |
d01ba2f1 | 1533 | #ifdef HAVE_NS |
76151e2c | 1534 | etc_dir ? etc_dir : |
d01ba2f1 | 1535 | #endif |
17e0445b | 1536 | PATH_DOC, 0); |
76151e2c | 1537 | Vdoc_directory = Ffile_name_as_directory (Fcar (Vdoc_directory)); |
9453ea7b | 1538 | |
e576cab4 | 1539 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1540 | PATH_EXEC path from epaths.h. */ |
cbb31951 GM |
1541 | Vexec_path = decode_env_path ("EMACSPATH", |
1542 | #ifdef HAVE_NS | |
1543 | path_exec ? path_exec : | |
1544 | #endif | |
17e0445b | 1545 | PATH_EXEC, 0); |
80856e74 | 1546 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
cbb31951 | 1547 | /* FIXME? For ns, path_exec should go at the front? */ |
17e0445b | 1548 | Vexec_path = nconc2 (decode_env_path ("PATH", "", 0), Vexec_path); |
8de15d69 RS |
1549 | } |
1550 | ||
e17f7533 | 1551 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1552 | |
dfcf069d | 1553 | void |
971de7fb | 1554 | init_callproc (void) |
8de15d69 RS |
1555 | { |
1556 | char *data_dir = egetenv ("EMACSDATA"); | |
177c0ea7 | 1557 | |
8de15d69 RS |
1558 | register char * sh; |
1559 | Lisp_Object tempdir; | |
d01ba2f1 GM |
1560 | #ifdef HAVE_NS |
1561 | if (data_dir == 0) | |
1562 | { | |
1563 | const char *etc_dir = ns_etc_directory (); | |
1564 | if (etc_dir) | |
1565 | { | |
1566 | data_dir = alloca (strlen (etc_dir) + 1); | |
1567 | strcpy (data_dir, etc_dir); | |
1568 | } | |
1569 | } | |
1570 | #endif | |
8de15d69 | 1571 | |
9cc4fad5 | 1572 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1573 | { |
05630743 RS |
1574 | /* Add to the path the lib-src subdir of the installation dir. */ |
1575 | Lisp_Object tem; | |
1576 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1577 | Vinstallation_directory); | |
76151e2c | 1578 | #ifndef MSDOS |
1a6640ec | 1579 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc | 1580 | if (NILP (Fmember (tem, Vexec_path))) |
70ec1377 | 1581 | { |
cbb31951 GM |
1582 | #ifdef HAVE_NS |
1583 | const char *path_exec = ns_exec_path (); | |
1584 | #endif | |
1585 | Vexec_path = decode_env_path ("EMACSPATH", | |
1586 | #ifdef HAVE_NS | |
1587 | path_exec ? path_exec : | |
1588 | #endif | |
17e0445b | 1589 | PATH_EXEC, 0); |
70ec1377 | 1590 | Vexec_path = Fcons (tem, Vexec_path); |
17e0445b | 1591 | Vexec_path = nconc2 (decode_env_path ("PATH", "", 0), Vexec_path); |
70ec1377 | 1592 | } |
177c0ea7 | 1593 | |
0fa248bc | 1594 | Vexec_directory = Ffile_name_as_directory (tem); |
76151e2c | 1595 | #endif /* not MSDOS */ |
8de15d69 | 1596 | |
e17f7533 RS |
1597 | /* Maybe use ../etc as well as ../lib-src. */ |
1598 | if (data_dir == 0) | |
1599 | { | |
1600 | tem = Fexpand_file_name (build_string ("etc"), | |
1601 | Vinstallation_directory); | |
1602 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1603 | } |
1604 | } | |
7e933683 RS |
1605 | |
1606 | /* Look for the files that should be in etc. We don't use | |
1607 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1608 | near the executable, and they are never in the build |
7e933683 RS |
1609 | directory when that's different from the source directory. |
1610 | ||
1611 | Instead, if these files are not in the nominal place, we try the | |
1612 | source directory. */ | |
1613 | if (data_dir == 0) | |
1614 | { | |
70ec1377 | 1615 | Lisp_Object tem, tem1, srcdir; |
624780f0 GM |
1616 | Lisp_Object lispdir = Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH, 0)); |
1617 | ||
1618 | srcdir = Fexpand_file_name (build_string ("../src/"), lispdir); | |
7e933683 RS |
1619 | |
1620 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); | |
1621 | tem1 = Ffile_exists_p (tem); | |
70ec1377 | 1622 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
7e933683 | 1623 | { |
70ec1377 | 1624 | Lisp_Object newdir; |
624780f0 | 1625 | newdir = Fexpand_file_name (build_string ("../etc/"), lispdir); |
7e933683 RS |
1626 | tem = Fexpand_file_name (build_string ("GNU"), newdir); |
1627 | tem1 = Ffile_exists_p (tem); | |
1628 | if (!NILP (tem1)) | |
1629 | Vdata_directory = newdir; | |
1630 | } | |
1631 | } | |
80856e74 | 1632 | |
d883eb62 RS |
1633 | #ifndef CANNOT_DUMP |
1634 | if (initialized) | |
1635 | #endif | |
1636 | { | |
1637 | tempdir = Fdirectory_file_name (Vexec_directory); | |
73dcdb9f PE |
1638 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
1639 | dir_warning ("arch-dependent data dir", Vexec_directory); | |
d883eb62 | 1640 | } |
80856e74 | 1641 | |
e576cab4 | 1642 | tempdir = Fdirectory_file_name (Vdata_directory); |
73dcdb9f PE |
1643 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
1644 | dir_warning ("arch-independent data dir", Vdata_directory); | |
e576cab4 | 1645 | |
83be8524 | 1646 | sh = getenv ("SHELL"); |
80856e74 | 1647 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
8abd035b | 1648 | |
40b49d4b JB |
1649 | #ifdef DOS_NT |
1650 | Vshared_game_score_directory = Qnil; | |
1651 | #else | |
d0065ff1 | 1652 | Vshared_game_score_directory = build_unibyte_string (PATH_GAME); |
73dcdb9f | 1653 | if (NILP (Ffile_accessible_directory_p (Vshared_game_score_directory))) |
63789758 | 1654 | Vshared_game_score_directory = Qnil; |
40b49d4b | 1655 | #endif |
9fefd2ba JB |
1656 | } |
1657 | ||
dfcf069d | 1658 | void |
971de7fb | 1659 | set_initial_environment (void) |
9fefd2ba | 1660 | { |
738db178 DN |
1661 | char **envp; |
1662 | for (envp = environ; *envp; envp++) | |
1663 | Vprocess_environment = Fcons (build_string (*envp), | |
1664 | Vprocess_environment); | |
1665 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent | |
1666 | to use `delete' and friends on process-environment. */ | |
1667 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); | |
80856e74 JB |
1668 | } |
1669 | ||
dfcf069d | 1670 | void |
971de7fb | 1671 | syms_of_callproc (void) |
80856e74 | 1672 | { |
f92d51d8 CY |
1673 | #ifndef DOS_NT |
1674 | Vtemp_file_name_pattern = build_string ("emacsXXXXXX"); | |
1675 | #elif defined (WINDOWSNT) | |
1676 | Vtemp_file_name_pattern = build_string ("emXXXXXX"); | |
1677 | #else | |
1678 | Vtemp_file_name_pattern = build_string ("detmp.XXX"); | |
1679 | #endif | |
1680 | staticpro (&Vtemp_file_name_pattern); | |
1681 | ||
94fcd171 PE |
1682 | #ifdef MSDOS |
1683 | synch_process_tempfile = make_number (0); | |
1684 | staticpro (&synch_process_tempfile); | |
1685 | #endif | |
1686 | ||
29208e82 | 1687 | DEFVAR_LISP ("shell-file-name", Vshell_file_name, |
fb7ada5f | 1688 | doc: /* File name to load inferior shells from. |
b20b29be EZ |
1689 | Initialized from the SHELL environment variable, or to a system-dependent |
1690 | default if SHELL is not set. */); | |
80856e74 | 1691 | |
29208e82 | 1692 | DEFVAR_LISP ("exec-path", Vexec_path, |
fb7ada5f | 1693 | doc: /* List of directories to search programs to run in subprocesses. |
fdadeb49 JC |
1694 | Each element is a string (directory name) or nil (try default directory). |
1695 | ||
1696 | By default the last element of this list is `exec-directory'. The | |
1697 | last element is not always used, for example in shell completion | |
1698 | (`shell-dynamic-complete-command'). */); | |
80856e74 | 1699 | |
29208e82 | 1700 | DEFVAR_LISP ("exec-suffixes", Vexec_suffixes, |
fb7ada5f | 1701 | doc: /* List of suffixes to try to find executable file names. |
fdb82f93 | 1702 | Each element is a string. */); |
33d5af99 | 1703 | Vexec_suffixes = Qnil; |
b81a1b72 | 1704 | |
29208e82 | 1705 | DEFVAR_LISP ("exec-directory", Vexec_directory, |
fdb82f93 PJ |
1706 | doc: /* Directory for executables for Emacs to invoke. |
1707 | More generally, this includes any architecture-dependent files | |
1708 | that are built and installed from the Emacs distribution. */); | |
e576cab4 | 1709 | |
29208e82 | 1710 | DEFVAR_LISP ("data-directory", Vdata_directory, |
fdb82f93 PJ |
1711 | doc: /* Directory of machine-independent files that come with GNU Emacs. |
1712 | These are files intended for Emacs to use while it runs. */); | |
80856e74 | 1713 | |
29208e82 | 1714 | DEFVAR_LISP ("doc-directory", Vdoc_directory, |
fdb82f93 | 1715 | doc: /* Directory containing the DOC file that comes with GNU Emacs. |
ebf24b59 | 1716 | This is usually the same as `data-directory'. */); |
35a2f4b8 | 1717 | |
29208e82 | 1718 | DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory, |
fdb82f93 PJ |
1719 | doc: /* For internal use by the build procedure only. |
1720 | This is the name of the directory in which the build procedure installed | |
ebf24b59 | 1721 | Emacs's info files; the default value for `Info-default-directory-list' |
fdb82f93 | 1722 | includes this. */); |
ed61592a JB |
1723 | Vconfigure_info_directory = build_string (PATH_INFO); |
1724 | ||
29208e82 | 1725 | DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory, |
b065672a CW |
1726 | doc: /* Directory of score files for games which come with GNU Emacs. |
1727 | If this variable is nil, then Emacs is unable to use a shared directory. */); | |
40b49d4b JB |
1728 | #ifdef DOS_NT |
1729 | Vshared_game_score_directory = Qnil; | |
1730 | #else | |
63789758 | 1731 | Vshared_game_score_directory = build_string (PATH_GAME); |
40b49d4b | 1732 | #endif |
b065672a | 1733 | |
29208e82 | 1734 | DEFVAR_LISP ("initial-environment", Vinitial_environment, |
6b8e474c SM |
1735 | doc: /* List of environment variables inherited from the parent process. |
1736 | Each element should be a string of the form ENVVARNAME=VALUE. | |
1737 | The elements must normally be decoded (using `locale-coding-system') for use. */); | |
1738 | Vinitial_environment = Qnil; | |
1739 | ||
29208e82 | 1740 | DEFVAR_LISP ("process-environment", Vprocess_environment, |
5990851d | 1741 | doc: /* List of overridden environment variables for subprocesses to inherit. |
fdb82f93 | 1742 | Each element should be a string of the form ENVVARNAME=VALUE. |
5990851d | 1743 | |
a13f8f50 KL |
1744 | Entries in this list take precedence to those in the frame-local |
1745 | environments. Therefore, let-binding `process-environment' is an easy | |
1746 | way to temporarily change the value of an environment variable, | |
1747 | irrespective of where it comes from. To use `process-environment' to | |
1748 | remove an environment variable, include only its name in the list, | |
1749 | without "=VALUE". | |
5990851d KL |
1750 | |
1751 | This variable is set to nil when Emacs starts. | |
1752 | ||
fdb82f93 PJ |
1753 | If multiple entries define the same variable, the first one always |
1754 | takes precedence. | |
5990851d | 1755 | |
776a24a1 | 1756 | Non-ASCII characters are encoded according to the initial value of |
5990851d KL |
1757 | `locale-coding-system', i.e. the elements must normally be decoded for |
1758 | use. | |
1759 | ||
776a24a1 | 1760 | See `setenv' and `getenv'. */); |
86f5ca04 | 1761 | Vprocess_environment = Qnil; |
80856e74 | 1762 | |
80856e74 | 1763 | defsubr (&Scall_process); |
83fa009c | 1764 | defsubr (&Sgetenv_internal); |
e576cab4 | 1765 | defsubr (&Scall_process_region); |
80856e74 | 1766 | } |