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 | ||
94fcd171 PE |
71 | /* The next two variables are used while record-unwind-protect is in place |
72 | during call-process for a subprocess for which record_deleted_pid has | |
73 | not yet been called. At other times, synch_process_pid is zero and | |
74 | synch_process_tempfile's contents are irrelevant. Doing this via static | |
bb5f74ee PE |
75 | C variables is more convenient than putting them into the arguments |
76 | of record-unwind-protect, as they need to be updated at randomish | |
77 | times in the code, and Lisp cannot always store these values as | |
78 | Emacs integers. It's safe to use static variables here, as the | |
79 | code is never invoked reentrantly. */ | |
80 | ||
81 | /* If nonzero, a process-ID that has not been reaped. */ | |
82 | static pid_t synch_process_pid; | |
83 | ||
94fcd171 PE |
84 | /* If a string, the name of a temp file that has not been removed. */ |
85 | #ifdef MSDOS | |
86 | static Lisp_Object synch_process_tempfile; | |
87 | #else | |
88 | # define synch_process_tempfile make_number (0) | |
89 | #endif | |
90 | ||
91 | /* Indexes of file descriptors that need closing on call_process_kill. */ | |
92 | enum | |
93 | { | |
94 | /* The subsidiary process's stdout and stderr. stdin is handled | |
95 | separately, in either Fcall_process_region or create_temp_file. */ | |
96 | CALLPROC_STDOUT, CALLPROC_STDERR, | |
97 | ||
98 | /* How to read from a pipe (or substitute) from the subsidiary process. */ | |
99 | CALLPROC_PIPEREAD, | |
100 | ||
101 | /* A bound on the number of file descriptors. */ | |
102 | CALLPROC_FDS | |
103 | }; | |
104 | ||
4a88129a | 105 | static Lisp_Object call_process (ptrdiff_t, Lisp_Object *, int, ptrdiff_t); |
bb5f74ee PE |
106 | \f |
107 | /* Block SIGCHLD. */ | |
80856e74 | 108 | |
c7041908 | 109 | void |
bb5f74ee PE |
110 | block_child_signal (void) |
111 | { | |
bb5f74ee PE |
112 | sigset_t blocked; |
113 | sigemptyset (&blocked); | |
114 | sigaddset (&blocked, SIGCHLD); | |
115 | pthread_sigmask (SIG_BLOCK, &blocked, 0); | |
bb5f74ee | 116 | } |
6b61353c | 117 | |
bb5f74ee | 118 | /* Unblock SIGCHLD. */ |
f105f403 | 119 | |
c7041908 | 120 | void |
bb5f74ee PE |
121 | unblock_child_signal (void) |
122 | { | |
bb5f74ee | 123 | pthread_sigmask (SIG_SETMASK, &empty_mask, 0); |
bb5f74ee | 124 | } |
37d54121 | 125 | |
c365c355 PE |
126 | /* Return the current buffer's working directory, or the home |
127 | directory if it's unreachable, as a string suitable for a system call. | |
128 | Signal an error if the result would not be an accessible directory. */ | |
129 | ||
130 | Lisp_Object | |
131 | encode_current_directory (void) | |
132 | { | |
133 | Lisp_Object dir; | |
134 | struct gcpro gcpro1; | |
135 | ||
136 | dir = BVAR (current_buffer, directory); | |
137 | GCPRO1 (dir); | |
138 | ||
139 | dir = Funhandled_file_name_directory (dir); | |
140 | ||
141 | /* If the file name handler says that dir is unreachable, use | |
142 | a sensible default. */ | |
143 | if (NILP (dir)) | |
144 | dir = build_string ("~"); | |
145 | ||
146 | dir = expand_and_dir_to_file (dir, Qnil); | |
147 | ||
148 | if (STRING_MULTIBYTE (dir)) | |
149 | dir = ENCODE_FILE (dir); | |
150 | if (! file_accessible_directory_p (SSDATA (dir))) | |
151 | report_file_error ("Setting current directory", | |
152 | BVAR (current_buffer, directory)); | |
153 | ||
154 | RETURN_UNGCPRO (dir); | |
155 | } | |
156 | ||
35fb8050 PE |
157 | /* If P is reapable, record it as a deleted process and kill it. |
158 | Do this in a critical section. Unless PID is wedged it will be | |
159 | reaped on receipt of the first SIGCHLD after the critical section. */ | |
160 | ||
161 | void | |
94fcd171 | 162 | record_kill_process (struct Lisp_Process *p, Lisp_Object tempfile) |
35fb8050 PE |
163 | { |
164 | block_child_signal (); | |
165 | ||
166 | if (p->alive) | |
167 | { | |
94fcd171 | 168 | record_deleted_pid (p->pid, tempfile); |
35fb8050 | 169 | p->alive = 0; |
d983a10b | 170 | kill (- p->pid, SIGKILL); |
35fb8050 PE |
171 | } |
172 | ||
173 | unblock_child_signal (); | |
174 | } | |
175 | ||
94fcd171 PE |
176 | /* Clean up files, file descriptors and processes created by Fcall_process. */ |
177 | ||
178 | static void | |
179 | delete_temp_file (Lisp_Object name) | |
180 | { | |
181 | unlink (SSDATA (name)); | |
182 | } | |
37d54121 | 183 | |
27e498e6 | 184 | static void |
94fcd171 | 185 | call_process_kill (void *ptr) |
d177f194 | 186 | { |
94fcd171 PE |
187 | int *callproc_fd = ptr; |
188 | int i; | |
189 | for (i = 0; i < CALLPROC_FDS; i++) | |
190 | if (0 <= callproc_fd[i]) | |
191 | emacs_close (callproc_fd[i]); | |
bb5f74ee | 192 | |
bb5f74ee PE |
193 | if (synch_process_pid) |
194 | { | |
35fb8050 PE |
195 | struct Lisp_Process proc; |
196 | proc.alive = 1; | |
197 | proc.pid = synch_process_pid; | |
94fcd171 PE |
198 | record_kill_process (&proc, synch_process_tempfile); |
199 | synch_process_pid = 0; | |
bb5f74ee | 200 | } |
94fcd171 PE |
201 | else if (STRINGP (synch_process_tempfile)) |
202 | delete_temp_file (synch_process_tempfile); | |
d177f194 JB |
203 | } |
204 | ||
94fcd171 PE |
205 | /* Clean up when exiting Fcall_process: restore the buffer, and |
206 | kill the subsidiary process group if the process still exists. */ | |
bb5f74ee | 207 | |
27e498e6 | 208 | static void |
94fcd171 | 209 | call_process_cleanup (Lisp_Object buffer) |
80856e74 | 210 | { |
bb5f74ee | 211 | Fset_buffer (buffer); |
d177f194 | 212 | |
bb5f74ee | 213 | if (synch_process_pid) |
d177f194 | 214 | { |
d983a10b | 215 | kill (-synch_process_pid, SIGINT); |
d177f194 JB |
216 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); |
217 | immediate_quit = 1; | |
218 | QUIT; | |
bb5f74ee PE |
219 | wait_for_termination (synch_process_pid, 0, 1); |
220 | synch_process_pid = 0; | |
d177f194 | 221 | immediate_quit = 0; |
d177f194 JB |
222 | message1 ("Waiting for process to die...done"); |
223 | } | |
80856e74 JB |
224 | } |
225 | ||
406af475 PE |
226 | #ifdef DOS_NT |
227 | static mode_t const default_output_mode = S_IREAD | S_IWRITE; | |
228 | #else | |
229 | static mode_t const default_output_mode = 0666; | |
230 | #endif | |
231 | ||
a7ca3326 | 232 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, |
fdb82f93 PJ |
233 | doc: /* Call PROGRAM synchronously in separate process. |
234 | The remaining arguments are optional. | |
235 | The program's input comes from file INFILE (nil means `/dev/null'). | |
38cd43eb | 236 | Insert output in DESTINATION before point; t means current buffer; nil for DESTINATION |
1ef14cb4 | 237 | means discard it; 0 means discard and don't wait; and `(:file FILE)', where |
1b9f60cc GM |
238 | FILE is a file name string, means that it should be written to that file |
239 | \(if the file already exists it is overwritten). | |
38cd43eb | 240 | DESTINATION can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
fdb82f93 PJ |
241 | REAL-BUFFER says what to do with standard output, as above, |
242 | while STDERR-FILE says what to do with standard error in the child. | |
243 | STDERR-FILE may be nil (discard standard error output), | |
244 | t (mix it with ordinary output), or a file name string. | |
245 | ||
246 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
247 | Remaining arguments are strings passed as command arguments to PROGRAM. | |
248 | ||
a4feb144 RS |
249 | If executable PROGRAM can't be found as an executable, `call-process' |
250 | signals a Lisp error. `call-process' reports errors in execution of | |
251 | the program only through its return and output. | |
252 | ||
38cd43eb | 253 | If DESTINATION is 0, `call-process' returns immediately with value nil. |
fdb82f93 PJ |
254 | Otherwise it waits for PROGRAM to terminate |
255 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
256 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
257 | ||
38cd43eb | 258 | usage: (call-process PROGRAM &optional INFILE DESTINATION DISPLAY &rest ARGS) */) |
f66c7cf8 | 259 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 260 | { |
94fcd171 PE |
261 | Lisp_Object infile, encoded_infile; |
262 | int filefd; | |
263 | struct gcpro gcpro1; | |
264 | ptrdiff_t count = SPECPDL_INDEX (); | |
265 | ||
266 | if (nargs >= 2 && ! NILP (args[1])) | |
267 | { | |
268 | infile = Fexpand_file_name (args[1], BVAR (current_buffer, directory)); | |
269 | CHECK_STRING (infile); | |
270 | } | |
271 | else | |
272 | infile = build_string (NULL_DEVICE); | |
273 | ||
274 | GCPRO1 (infile); | |
275 | encoded_infile = STRING_MULTIBYTE (infile) ? ENCODE_FILE (infile) : infile; | |
276 | ||
277 | filefd = emacs_open (SSDATA (encoded_infile), O_RDONLY, 0); | |
278 | if (filefd < 0) | |
279 | report_file_error ("Opening process input file", infile); | |
280 | record_unwind_protect_int (close_file_unwind, filefd); | |
281 | UNGCPRO; | |
4a88129a | 282 | return unbind_to (count, call_process (nargs, args, filefd, -1)); |
94fcd171 PE |
283 | } |
284 | ||
285 | /* Like Fcall_process (NARGS, ARGS), except use FILEFD as the input file. | |
4a88129a PE |
286 | |
287 | If TEMPFILE_INDEX is nonnegative, it is the specpdl index of an | |
288 | unwinder that is intended to remove the input temporary file; in | |
289 | this case NARGS must be at least 2 and ARGS[1] is the file's name. | |
290 | ||
94fcd171 PE |
291 | At entry, the specpdl stack top entry must be close_file_unwind (FILEFD). */ |
292 | ||
293 | static Lisp_Object | |
4a88129a PE |
294 | call_process (ptrdiff_t nargs, Lisp_Object *args, int filefd, |
295 | ptrdiff_t tempfile_index) | |
94fcd171 PE |
296 | { |
297 | Lisp_Object buffer, current_dir, path; | |
2f221583 | 298 | bool display_p; |
94fcd171 PE |
299 | int fd0; |
300 | int callproc_fd[CALLPROC_FDS]; | |
bb5f74ee | 301 | int status; |
94fcd171 | 302 | ptrdiff_t i; |
d311d28c PE |
303 | ptrdiff_t count = SPECPDL_INDEX (); |
304 | USE_SAFE_ALLOCA; | |
2d607244 | 305 | |
60aeceb8 | 306 | char **new_argv; |
39eaa782 RS |
307 | /* File to use for stderr in the child. |
308 | t means use same as standard output. */ | |
309 | Lisp_Object error_file; | |
1ef14cb4 | 310 | Lisp_Object output_file = Qnil; |
7e6c2178 | 311 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
94fcd171 | 312 | char *tempfile = NULL; |
d311d28c PE |
313 | int pid; |
314 | #else | |
315 | pid_t pid; | |
80856e74 | 316 | #endif |
bb5f74ee | 317 | int child_errno; |
94fcd171 | 318 | int fd_output, fd_error; |
32d08644 KH |
319 | struct coding_system process_coding; /* coding-system of process output */ |
320 | struct coding_system argument_coding; /* coding-system of arguments */ | |
09494912 RS |
321 | /* Set to the return value of Ffind_operation_coding_system. */ |
322 | Lisp_Object coding_systems; | |
94fcd171 PE |
323 | bool discard_output; |
324 | ||
325 | if (synch_process_pid) | |
326 | error ("call-process invoked recursively"); | |
09494912 RS |
327 | |
328 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ | |
329 | coding_systems = Qt; | |
32d08644 | 330 | |
b7826503 | 331 | CHECK_STRING (args[0]); |
80856e74 | 332 | |
39eaa782 RS |
333 | error_file = Qt; |
334 | ||
7e6c2178 RS |
335 | #ifndef subprocesses |
336 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
177c0ea7 | 337 | if (nargs >= 3 |
09ffb8b5 | 338 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
339 | error ("Operating system cannot handle asynchronous subprocesses"); |
340 | #endif /* subprocesses */ | |
341 | ||
09494912 | 342 | /* Decide the coding-system for giving arguments. */ |
32d08644 KH |
343 | { |
344 | Lisp_Object val, *args2; | |
32d08644 KH |
345 | |
346 | /* If arguments are supplied, we may have to encode them. */ | |
347 | if (nargs >= 5) | |
348 | { | |
2f221583 | 349 | bool must_encode = 0; |
6e50da0a | 350 | Lisp_Object coding_attrs; |
30d57b8e | 351 | |
e7c1c20e | 352 | for (i = 4; i < nargs; i++) |
b7826503 | 353 | CHECK_STRING (args[i]); |
e7c1c20e | 354 | |
a2286b5c | 355 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
356 | if (STRING_MULTIBYTE (args[i])) |
357 | must_encode = 1; | |
358 | ||
beacaab3 KH |
359 | if (!NILP (Vcoding_system_for_write)) |
360 | val = Vcoding_system_for_write; | |
30d57b8e | 361 | else if (! must_encode) |
fcaf8878 | 362 | val = Qraw_text; |
beacaab3 | 363 | else |
32d08644 | 364 | { |
0065d054 | 365 | SAFE_NALLOCA (args2, 1, nargs + 1); |
32d08644 KH |
366 | args2[0] = Qcall_process; |
367 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 368 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 369 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
32d08644 | 370 | } |
fcaf8878 | 371 | val = complement_process_encoding_system (val); |
32d08644 | 372 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); |
6e50da0a KH |
373 | coding_attrs = CODING_ID_ATTRS (argument_coding.id); |
374 | if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs))) | |
375 | { | |
376 | /* We should not use an ASCII incompatible coding system. */ | |
377 | val = raw_text_coding_system (val); | |
378 | setup_coding_system (val, &argument_coding); | |
379 | } | |
32d08644 | 380 | } |
32d08644 KH |
381 | } |
382 | ||
94fcd171 PE |
383 | if (nargs < 3) |
384 | buffer = Qnil; | |
80856e74 | 385 | else |
e576cab4 | 386 | { |
39eaa782 RS |
387 | buffer = args[2]; |
388 | ||
1ef14cb4 LMI |
389 | /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT |
390 | FILE-FOR-STDERR), unless the first element is :file, in which case see | |
391 | the next paragraph. */ | |
94fcd171 | 392 | if (CONSP (buffer) && !EQ (XCAR (buffer), QCfile)) |
39eaa782 | 393 | { |
70949dac | 394 | if (CONSP (XCDR (buffer))) |
45be8a1e | 395 | { |
a9d4f28a | 396 | Lisp_Object stderr_file; |
70949dac | 397 | stderr_file = XCAR (XCDR (buffer)); |
45be8a1e RS |
398 | |
399 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
400 | error_file = stderr_file; | |
401 | else | |
402 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
403 | } | |
404 | ||
70949dac | 405 | buffer = XCAR (buffer); |
39eaa782 | 406 | } |
044512ed | 407 | |
1ef14cb4 | 408 | /* If the buffer is (still) a list, it might be a (:file "file") spec. */ |
94fcd171 | 409 | if (CONSP (buffer) && EQ (XCAR (buffer), QCfile)) |
1ef14cb4 LMI |
410 | { |
411 | output_file = Fexpand_file_name (XCAR (XCDR (buffer)), | |
412 | BVAR (current_buffer, directory)); | |
413 | CHECK_STRING (output_file); | |
414 | buffer = Qnil; | |
415 | } | |
416 | ||
94fcd171 | 417 | if (! (NILP (buffer) || EQ (buffer, Qt) || INTEGERP (buffer))) |
e576cab4 | 418 | { |
39eaa782 RS |
419 | Lisp_Object spec_buffer; |
420 | spec_buffer = buffer; | |
50fe359b | 421 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
422 | /* Mention the buffer name for a better error message. */ |
423 | if (NILP (buffer)) | |
b7826503 PJ |
424 | CHECK_BUFFER (spec_buffer); |
425 | CHECK_BUFFER (buffer); | |
e576cab4 JB |
426 | } |
427 | } | |
80856e74 | 428 | |
58616e67 JB |
429 | /* Make sure that the child will be able to chdir to the current |
430 | buffer's current directory, or its unhandled equivalent. We | |
431 | can't just have the child check for an error when it does the | |
432 | chdir, since it's in a vfork. | |
433 | ||
434 | We have to GCPRO around this because Fexpand_file_name, | |
435 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
436 | might call a file name handling function. The argument list is | |
437 | protected by the caller, so all we really have to worry about is | |
438 | buffer. */ | |
439 | { | |
94fcd171 | 440 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
58616e67 | 441 | |
c365c355 | 442 | current_dir = encode_current_directory (); |
58616e67 | 443 | |
94fcd171 | 444 | GCPRO4 (buffer, current_dir, error_file, output_file); |
58616e67 | 445 | |
34b87689 KH |
446 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) |
447 | error_file = ENCODE_FILE (error_file); | |
1ef14cb4 LMI |
448 | if (STRINGP (output_file) && STRING_MULTIBYTE (output_file)) |
449 | output_file = ENCODE_FILE (output_file); | |
58616e67 JB |
450 | UNGCPRO; |
451 | } | |
452 | ||
d311d28c | 453 | display_p = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
80856e74 | 454 | |
94fcd171 PE |
455 | for (i = 0; i < CALLPROC_FDS; i++) |
456 | callproc_fd[i] = -1; | |
457 | #ifdef MSDOS | |
458 | synch_process_tempfile = make_number (0); | |
459 | #endif | |
460 | record_unwind_protect_ptr (call_process_kill, callproc_fd); | |
1ef14cb4 | 461 | |
80856e74 | 462 | /* Search for program; barf if not found. */ |
c52b0b34 | 463 | { |
94fcd171 | 464 | struct gcpro gcpro1, gcpro2, gcpro3; |
a773ed9a | 465 | int ok; |
c52b0b34 | 466 | |
94fcd171 | 467 | GCPRO3 (buffer, current_dir, error_file); |
a773ed9a | 468 | ok = openp (Vexec_path, args[0], Vexec_suffixes, &path, make_number (X_OK)); |
c52b0b34 | 469 | UNGCPRO; |
a773ed9a | 470 | if (ok < 0) |
94fcd171 | 471 | report_file_error ("Searching for program", args[0]); |
c52b0b34 | 472 | } |
8ee8f447 RS |
473 | |
474 | /* If program file name starts with /: for quoting a magic name, | |
475 | discard that. */ | |
476 | if (SBYTES (path) > 2 && SREF (path, 0) == '/' | |
477 | && SREF (path, 1) == ':') | |
478 | path = Fsubstring (path, make_number (2), Qnil); | |
479 | ||
98c6f1e3 | 480 | new_argv = SAFE_ALLOCA ((nargs > 4 ? nargs - 2 : 2) * sizeof *new_argv); |
c364e618 | 481 | |
e7c3fb06 | 482 | { |
94fcd171 | 483 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
e7c3fb06 | 484 | |
94fcd171 | 485 | GCPRO4 (buffer, current_dir, path, error_file); |
e7c3fb06 EZ |
486 | if (nargs > 4) |
487 | { | |
488 | ptrdiff_t i; | |
489 | ||
490 | argument_coding.dst_multibyte = 0; | |
491 | for (i = 4; i < nargs; i++) | |
492 | { | |
493 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); | |
494 | if (CODING_REQUIRE_ENCODING (&argument_coding)) | |
495 | /* We must encode this argument. */ | |
496 | args[i] = encode_coding_string (&argument_coding, args[i], 1); | |
497 | } | |
498 | for (i = 4; i < nargs; i++) | |
94fbc901 | 499 | new_argv[i - 3] = SSDATA (args[i]); |
e7c3fb06 EZ |
500 | new_argv[i - 3] = 0; |
501 | } | |
502 | else | |
503 | new_argv[1] = 0; | |
504 | if (STRING_MULTIBYTE (path)) | |
505 | path = ENCODE_FILE (path); | |
94fbc901 | 506 | new_argv[0] = SSDATA (path); |
e7c3fb06 EZ |
507 | UNGCPRO; |
508 | } | |
80856e74 | 509 | |
94fcd171 | 510 | discard_output = INTEGERP (buffer) || (NILP (buffer) && NILP (output_file)); |
7e6c2178 | 511 | |
94fcd171 PE |
512 | #ifdef MSDOS |
513 | if (! discard_output && ! STRINGP (output_file)) | |
7e6c2178 | 514 | { |
94fcd171 PE |
515 | char const *tmpdir = egetenv ("TMPDIR"); |
516 | char const *outf = tmpdir ? tmpdir : ""; | |
517 | tempfile = alloca (strlen (outf) + 20); | |
518 | strcpy (tempfile, outf); | |
e7ac588e | 519 | dostounix_filename (tempfile, 0); |
888c9e86 EZ |
520 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') |
521 | strcat (tempfile, "/"); | |
522 | strcat (tempfile, "detmp.XXX"); | |
523 | mktemp (tempfile); | |
94fcd171 PE |
524 | if (!*tempfile) |
525 | report_file_error ("Opening process output file", Qnil); | |
526 | output_file = build_string (tempfile); | |
527 | synch_process_tempfile = output_file; | |
528 | } | |
529 | #endif | |
530 | ||
531 | if (discard_output) | |
532 | { | |
533 | fd_output = emacs_open (NULL_DEVICE, O_WRONLY, 0); | |
534 | if (fd_output < 0) | |
535 | report_file_error ("Opening null device", Qnil); | |
536 | } | |
537 | else if (STRINGP (output_file)) | |
538 | { | |
539 | fd_output = emacs_open (SSDATA (output_file), | |
540 | O_WRONLY | O_CREAT | O_TRUNC | O_TEXT, | |
541 | default_output_mode); | |
542 | if (fd_output < 0) | |
a773ed9a PE |
543 | { |
544 | int open_errno = errno; | |
94fcd171 | 545 | output_file = DECODE_FILE (output_file); |
a773ed9a | 546 | report_file_errno ("Opening process output file", |
94fcd171 | 547 | output_file, open_errno); |
a773ed9a | 548 | } |
7e6c2178 | 549 | } |
80856e74 JB |
550 | else |
551 | { | |
60aeceb8 | 552 | int fd[2]; |
c7ddc792 | 553 | if (emacs_pipe (fd) != 0) |
94fcd171 PE |
554 | report_file_error ("Creating process pipe", Qnil); |
555 | callproc_fd[CALLPROC_PIPEREAD] = fd[0]; | |
556 | fd_output = fd[1]; | |
80856e74 | 557 | } |
94fcd171 | 558 | callproc_fd[CALLPROC_STDOUT] = fd_output; |
80856e74 | 559 | |
94fcd171 | 560 | fd_error = fd_output; |
80856e74 | 561 | |
94fcd171 PE |
562 | if (STRINGP (error_file) || (NILP (error_file) && !discard_output)) |
563 | { | |
564 | fd_error = emacs_open ((STRINGP (error_file) | |
565 | ? SSDATA (error_file) | |
566 | : NULL_DEVICE), | |
406af475 PE |
567 | O_WRONLY | O_CREAT | O_TRUNC | O_TEXT, |
568 | default_output_mode); | |
94fcd171 PE |
569 | if (fd_error < 0) |
570 | { | |
571 | int open_errno = errno; | |
572 | report_file_errno ("Cannot redirect stderr", | |
573 | (STRINGP (error_file) | |
574 | ? DECODE_FILE (error_file) | |
575 | : build_string (NULL_DEVICE)), | |
576 | open_errno); | |
577 | } | |
578 | callproc_fd[CALLPROC_STDERR] = fd_error; | |
579 | } | |
89e1ec1d | 580 | |
2610078a | 581 | #ifdef MSDOS /* MW, July 1993 */ |
94fcd171 PE |
582 | /* Note that on MSDOS `child_setup' actually returns the child process |
583 | exit status, not its PID, so assign it to status below. */ | |
584 | pid = child_setup (filefd, fd_output, fd_error, new_argv, 0, current_dir); | |
585 | ||
586 | if (pid < 0) | |
587 | { | |
588 | child_errno = errno; | |
589 | unbind_to (count, Qnil); | |
590 | synchronize_system_messages_locale (); | |
591 | return | |
592 | code_convert_string_norecord (build_string (strerror (child_errno)), | |
593 | Vlocale_coding_system, 0); | |
594 | } | |
595 | status = pid; | |
596 | ||
597 | for (i = 0; i < CALLPROC_FDS; i++) | |
598 | if (0 <= callproc_fd[i]) | |
2610078a | 599 | { |
94fcd171 PE |
600 | emacs_close (callproc_fd[i]); |
601 | callproc_fd[i] = -1; | |
2610078a | 602 | } |
94fcd171 PE |
603 | emacs_close (filefd); |
604 | clear_unwind_protect (count - 1); | |
605 | ||
606 | if (tempfile) | |
607 | { | |
608 | /* Since CRLF is converted to LF within `decode_coding', we | |
609 | can always open a file with binary mode. */ | |
610 | callproc_fd[CALLPROC_PIPEREAD] = emacs_open (tempfile, | |
611 | O_RDONLY | O_BINARY, 0); | |
612 | if (callproc_fd[CALLPROC_PIPEREAD] < 0) | |
613 | { | |
614 | int open_errno = errno; | |
615 | report_file_errno ("Cannot re-open temporary file", | |
616 | build_string (tempfile), open_errno); | |
617 | } | |
618 | } | |
619 | ||
644d3f0d | 620 | #endif /* MSDOS */ |
bb5f74ee | 621 | |
94fcd171 PE |
622 | /* Do the unwind-protect now, even though the pid is not known, so |
623 | that no storage allocation is done in the critical section. | |
624 | The actual PID will be filled in during the critical section. */ | |
625 | record_unwind_protect (call_process_cleanup, Fcurrent_buffer ()); | |
644d3f0d | 626 | |
94fcd171 | 627 | #ifndef MSDOS |
bb5f74ee | 628 | |
94fcd171 PE |
629 | block_input (); |
630 | block_child_signal (); | |
bb5f74ee | 631 | |
bad95d8f | 632 | #ifdef WINDOWSNT |
94fcd171 | 633 | pid = child_setup (filefd, fd_output, fd_error, new_argv, 0, current_dir); |
bad95d8f | 634 | #else /* not WINDOWSNT */ |
c0ad4ea5 | 635 | |
94fcd171 PE |
636 | /* vfork, and prevent local vars from being clobbered by the vfork. */ |
637 | { | |
638 | Lisp_Object volatile buffer_volatile = buffer; | |
639 | Lisp_Object volatile coding_systems_volatile = coding_systems; | |
640 | Lisp_Object volatile current_dir_volatile = current_dir; | |
641 | bool volatile display_p_volatile = display_p; | |
642 | bool volatile sa_must_free_volatile = sa_must_free; | |
643 | int volatile fd_error_volatile = fd_error; | |
644 | int volatile filefd_volatile = filefd; | |
645 | ptrdiff_t volatile count_volatile = count; | |
646 | ptrdiff_t volatile sa_count_volatile = sa_count; | |
647 | char **volatile new_argv_volatile = new_argv; | |
648 | int volatile callproc_fd_volatile[CALLPROC_FDS]; | |
649 | for (i = 0; i < CALLPROC_FDS; i++) | |
650 | callproc_fd_volatile[i] = callproc_fd[i]; | |
651 | ||
652 | pid = vfork (); | |
653 | ||
654 | buffer = buffer_volatile; | |
655 | coding_systems = coding_systems_volatile; | |
656 | current_dir = current_dir_volatile; | |
657 | display_p = display_p_volatile; | |
658 | sa_must_free = sa_must_free_volatile; | |
659 | fd_error = fd_error_volatile; | |
660 | filefd = filefd_volatile; | |
661 | count = count_volatile; | |
662 | sa_count = sa_count_volatile; | |
663 | new_argv = new_argv_volatile; | |
664 | ||
665 | for (i = 0; i < CALLPROC_FDS; i++) | |
666 | callproc_fd[i] = callproc_fd_volatile[i]; | |
667 | fd_output = callproc_fd[CALLPROC_STDOUT]; | |
668 | } | |
bb5f74ee | 669 | |
94fcd171 PE |
670 | if (pid == 0) |
671 | { | |
672 | unblock_child_signal (); | |
322aea6d | 673 | |
94fcd171 | 674 | setsid (); |
c0ad4ea5 | 675 | |
94fcd171 PE |
676 | /* Emacs ignores SIGPIPE, but the child should not. */ |
677 | signal (SIGPIPE, SIG_DFL); | |
c0ad4ea5 | 678 | |
94fcd171 PE |
679 | child_setup (filefd, fd_output, fd_error, new_argv, 0, current_dir); |
680 | } | |
aba637ec | 681 | |
bad95d8f | 682 | #endif /* not WINDOWSNT */ |
cd5f8f60 | 683 | |
94fcd171 | 684 | child_errno = errno; |
bb5f74ee | 685 | |
94fcd171 | 686 | if (pid > 0) |
4a88129a PE |
687 | { |
688 | synch_process_pid = pid; | |
689 | ||
690 | if (INTEGERP (buffer)) | |
691 | { | |
692 | if (tempfile_index < 0) | |
693 | record_deleted_pid (pid, Qnil); | |
694 | else | |
695 | { | |
696 | eassert (1 < nargs); | |
697 | record_deleted_pid (pid, args[1]); | |
698 | clear_unwind_protect (tempfile_index); | |
699 | } | |
700 | synch_process_pid = 0; | |
701 | } | |
702 | } | |
bb5f74ee | 703 | |
94fcd171 PE |
704 | unblock_child_signal (); |
705 | unblock_input (); | |
bb5f74ee | 706 | |
2610078a | 707 | #endif /* not MSDOS */ |
80856e74 | 708 | |
80856e74 | 709 | if (pid < 0) |
a773ed9a | 710 | report_file_errno ("Doing vfork", Qnil, child_errno); |
80856e74 | 711 | |
94fcd171 PE |
712 | /* Close our file descriptors, except for callproc_fd[CALLPROC_PIPEREAD] |
713 | since we will use that to read input from. */ | |
714 | for (i = 0; i < CALLPROC_FDS; i++) | |
715 | if (i != CALLPROC_PIPEREAD && 0 <= callproc_fd[i]) | |
716 | { | |
717 | emacs_close (callproc_fd[i]); | |
718 | callproc_fd[i] = -1; | |
719 | } | |
720 | emacs_close (filefd); | |
721 | clear_unwind_protect (count - 1); | |
722 | ||
d50d3dc8 | 723 | if (INTEGERP (buffer)) |
644d3f0d | 724 | return unbind_to (count, Qnil); |
80856e74 | 725 | |
d50d3dc8 | 726 | if (BUFFERP (buffer)) |
80856e74 JB |
727 | Fset_buffer (buffer); |
728 | ||
94fcd171 PE |
729 | fd0 = callproc_fd[CALLPROC_PIPEREAD]; |
730 | ||
731 | if (0 <= fd0) | |
09494912 RS |
732 | { |
733 | Lisp_Object val, *args2; | |
734 | ||
735 | val = Qnil; | |
736 | if (!NILP (Vcoding_system_for_read)) | |
737 | val = Vcoding_system_for_read; | |
738 | else | |
739 | { | |
740 | if (EQ (coding_systems, Qt)) | |
741 | { | |
f66c7cf8 | 742 | ptrdiff_t i; |
09494912 | 743 | |
0065d054 | 744 | SAFE_NALLOCA (args2, 1, nargs + 1); |
09494912 RS |
745 | args2[0] = Qcall_process; |
746 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
747 | coding_systems | |
748 | = Ffind_operation_coding_system (nargs + 1, args2); | |
749 | } | |
750 | if (CONSP (coding_systems)) | |
70949dac | 751 | val = XCAR (coding_systems); |
09494912 | 752 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 753 | val = XCAR (Vdefault_process_coding_system); |
09494912 RS |
754 | else |
755 | val = Qnil; | |
756 | } | |
91183bfd | 757 | Fcheck_coding_system (val); |
09494912 RS |
758 | /* In unibyte mode, character code conversion should not take |
759 | place but EOL conversion should. So, setup raw-text or one | |
760 | of the subsidiary according to the information just setup. */ | |
4b4deea2 | 761 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
09494912 | 762 | && !NILP (val)) |
91183bfd KH |
763 | val = raw_text_coding_system (val); |
764 | setup_coding_system (val, &process_coding); | |
659afede KH |
765 | process_coding.dst_multibyte |
766 | = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); | |
94fcd171 | 767 | process_coding.src_multibyte = 0; |
09494912 RS |
768 | } |
769 | ||
80856e74 JB |
770 | immediate_quit = 1; |
771 | QUIT; | |
772 | ||
94fcd171 | 773 | if (0 <= fd0) |
19ed11ba | 774 | { |
60aeceb8 PE |
775 | enum { CALLPROC_BUFFER_SIZE_MIN = 16 * 1024 }; |
776 | enum { CALLPROC_BUFFER_SIZE_MAX = 4 * CALLPROC_BUFFER_SIZE_MIN }; | |
777 | char buf[CALLPROC_BUFFER_SIZE_MAX]; | |
778 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; | |
2f221583 PE |
779 | int nread; |
780 | bool first = 1; | |
19ed11ba AS |
781 | EMACS_INT total_read = 0; |
782 | int carryover = 0; | |
2f221583 | 783 | bool display_on_the_fly = display_p; |
94fcd171 | 784 | struct coding_system saved_coding = process_coding; |
19ed11ba | 785 | |
19ed11ba AS |
786 | while (1) |
787 | { | |
788 | /* Repeatedly read until we've filled as much as possible | |
789 | of the buffer size we have. But don't read | |
790 | less than 1024--save that for the next bufferful. */ | |
791 | nread = carryover; | |
792 | while (nread < bufsize - 1024) | |
793 | { | |
60aeceb8 | 794 | int this_read = emacs_read (fd0, buf + nread, |
19ed11ba | 795 | bufsize - nread); |
60558b19 | 796 | |
19ed11ba AS |
797 | if (this_read < 0) |
798 | goto give_up; | |
60558b19 | 799 | |
19ed11ba AS |
800 | if (this_read == 0) |
801 | { | |
802 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
803 | break; | |
804 | } | |
60558b19 | 805 | |
19ed11ba AS |
806 | nread += this_read; |
807 | total_read += this_read; | |
60558b19 | 808 | |
19ed11ba AS |
809 | if (display_on_the_fly) |
810 | break; | |
811 | } | |
60558b19 | 812 | |
19ed11ba AS |
813 | /* Now NREAD is the total amount of data in the buffer. */ |
814 | immediate_quit = 0; | |
177c0ea7 | 815 | |
94fcd171 PE |
816 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
817 | && ! CODING_MAY_REQUIRE_DECODING (&process_coding)) | |
818 | insert_1_both (buf, nread, nread, 0, 1, 0); | |
819 | else | |
820 | { /* We have to decode the input. */ | |
821 | Lisp_Object curbuf; | |
822 | ptrdiff_t count1 = SPECPDL_INDEX (); | |
823 | ||
824 | XSETBUFFER (curbuf, current_buffer); | |
825 | /* We cannot allow after-change-functions be run | |
826 | during decoding, because that might modify the | |
827 | buffer, while we rely on process_coding.produced to | |
828 | faithfully reflect inserted text until we | |
829 | TEMP_SET_PT_BOTH below. */ | |
830 | specbind (Qinhibit_modification_hooks, Qt); | |
831 | decode_coding_c_string (&process_coding, | |
832 | (unsigned char *) buf, nread, curbuf); | |
833 | unbind_to (count1, Qnil); | |
834 | if (display_on_the_fly | |
835 | && CODING_REQUIRE_DETECTION (&saved_coding) | |
836 | && ! CODING_REQUIRE_DETECTION (&process_coding)) | |
837 | { | |
838 | /* We have detected some coding system, but the | |
839 | detection may have been via insufficient data. | |
840 | So give up displaying on the fly. */ | |
841 | if (process_coding.produced > 0) | |
842 | del_range_2 (process_coding.dst_pos, | |
843 | process_coding.dst_pos_byte, | |
844 | (process_coding.dst_pos | |
845 | + process_coding.produced_char), | |
846 | (process_coding.dst_pos_byte | |
847 | + process_coding.produced), | |
848 | 0); | |
849 | display_on_the_fly = 0; | |
850 | process_coding = saved_coding; | |
851 | carryover = nread; | |
852 | /* Make the above condition always fail in the future. */ | |
853 | saved_coding.common_flags | |
854 | &= ~CODING_REQUIRE_DETECTION_MASK; | |
855 | continue; | |
19ed11ba | 856 | } |
94fcd171 PE |
857 | |
858 | TEMP_SET_PT_BOTH (PT + process_coding.produced_char, | |
859 | PT_BYTE + process_coding.produced); | |
860 | carryover = process_coding.carryover_bytes; | |
861 | if (carryover > 0) | |
862 | memcpy (buf, process_coding.carryover, | |
863 | process_coding.carryover_bytes); | |
19ed11ba | 864 | } |
c5bfa12b | 865 | |
19ed11ba AS |
866 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
867 | break; | |
6e3bfbb2 | 868 | |
19ed11ba AS |
869 | /* Make the buffer bigger as we continue to read more data, |
870 | but not past CALLPROC_BUFFER_SIZE_MAX. */ | |
871 | if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) | |
872 | if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) | |
873 | bufsize = CALLPROC_BUFFER_SIZE_MAX; | |
6e3bfbb2 | 874 | |
19ed11ba AS |
875 | if (display_p) |
876 | { | |
877 | if (first) | |
878 | prepare_menu_bars (); | |
879 | first = 0; | |
880 | redisplay_preserve_echo_area (1); | |
881 | /* This variable might have been set to 0 for code | |
94fcd171 | 882 | detection. In that case, set it back to 1 because |
19ed11ba AS |
883 | we should have already detected a coding system. */ |
884 | display_on_the_fly = 1; | |
885 | } | |
886 | immediate_quit = 1; | |
887 | QUIT; | |
888 | } | |
889 | give_up: ; | |
890 | ||
891 | Vlast_coding_system_used = CODING_ID_NAME (process_coding.id); | |
892 | /* If the caller required, let the buffer inherit the | |
893 | coding-system used to decode the process output. */ | |
894 | if (inherit_process_coding_system) | |
895 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
896 | make_number (total_read)); | |
897 | } | |
3b440bb5 | 898 | |
77defa9a | 899 | #ifndef MSDOS |
80856e74 | 900 | /* Wait for it to terminate, unless it already has. */ |
94fcd171 | 901 | wait_for_termination (pid, &status, fd0 < 0); |
77defa9a | 902 | #endif |
80856e74 JB |
903 | |
904 | immediate_quit = 0; | |
905 | ||
37d54121 RS |
906 | /* Don't kill any children that the subprocess may have left behind |
907 | when exiting. */ | |
bb5f74ee | 908 | synch_process_pid = 0; |
37d54121 | 909 | |
3c59b4c9 | 910 | SAFE_FREE (); |
80856e74 JB |
911 | unbind_to (count, Qnil); |
912 | ||
bb5f74ee | 913 | if (WIFSIGNALED (status)) |
6b61353c | 914 | { |
42ca4633 | 915 | const char *signame; |
6b61353c KH |
916 | |
917 | synchronize_system_messages_locale (); | |
bb5f74ee | 918 | signame = strsignal (WTERMSIG (status)); |
6b61353c KH |
919 | |
920 | if (signame == 0) | |
19ed11ba | 921 | signame = "unknown"; |
6b61353c | 922 | |
bb5f74ee PE |
923 | return code_convert_string_norecord (build_string (signame), |
924 | Vlocale_coding_system, 0); | |
6b61353c KH |
925 | } |
926 | ||
bb5f74ee PE |
927 | eassert (WIFEXITED (status)); |
928 | return make_number (WEXITSTATUS (status)); | |
80856e74 | 929 | } |
80856e74 | 930 | \f |
bafe80ce PE |
931 | /* Create a temporary file suitable for storing the input data of |
932 | call-process-region. NARGS and ARGS are the same as for | |
94fcd171 PE |
933 | call-process-region. Store into *FILENAME_STRING_PTR a Lisp string |
934 | naming the file, and return a file descriptor for reading. | |
935 | Unwind-protect the file, so that the file descriptor will be closed | |
936 | and the file removed when the caller unwinds the specpdl stack. */ | |
fdb82f93 | 937 | |
94fcd171 PE |
938 | static int |
939 | create_temp_file (ptrdiff_t nargs, Lisp_Object *args, | |
940 | Lisp_Object *filename_string_ptr) | |
80856e74 | 941 | { |
94fcd171 | 942 | int fd; |
39323a7e KH |
943 | struct gcpro gcpro1; |
944 | Lisp_Object filename_string; | |
bafe80ce | 945 | Lisp_Object val, start, end; |
98c6f1e3 | 946 | Lisp_Object tmpdir; |
7e6c2178 | 947 | |
f92d51d8 CY |
948 | if (STRINGP (Vtemporary_file_directory)) |
949 | tmpdir = Vtemporary_file_directory; | |
7e6c2178 RS |
950 | else |
951 | { | |
83be8524 | 952 | char *outf; |
f92d51d8 | 953 | #ifndef DOS_NT |
83be8524 PE |
954 | outf = getenv ("TMPDIR"); |
955 | tmpdir = build_string (outf ? outf : "/tmp/"); | |
f92d51d8 | 956 | #else /* DOS_NT */ |
f92d51d8 CY |
957 | if ((outf = egetenv ("TMPDIR")) |
958 | || (outf = egetenv ("TMP")) | |
959 | || (outf = egetenv ("TEMP"))) | |
960 | tmpdir = build_string (outf); | |
961 | else | |
962 | tmpdir = Ffile_name_as_directory (build_string ("c:/temp")); | |
0774fcf8 | 963 | #endif |
f92d51d8 | 964 | } |
7e6c2178 | 965 | |
3c59b4c9 | 966 | { |
98c6f1e3 | 967 | Lisp_Object pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir); |
74ba1583 | 968 | char *tempfile; |
94fcd171 | 969 | ptrdiff_t count; |
74ba1583 EZ |
970 | |
971 | #ifdef WINDOWSNT | |
972 | /* Cannot use the result of Fexpand_file_name, because it | |
973 | downcases the XXXXXX part of the pattern, and mktemp then | |
974 | doesn't recognize it. */ | |
975 | if (!NILP (Vw32_downcase_file_names)) | |
976 | { | |
977 | Lisp_Object dirname = Ffile_name_directory (pattern); | |
978 | ||
979 | if (NILP (dirname)) | |
980 | pattern = Vtemp_file_name_pattern; | |
981 | else | |
982 | pattern = concat2 (dirname, Vtemp_file_name_pattern); | |
983 | } | |
984 | #endif | |
985 | ||
bafe80ce PE |
986 | filename_string = Fcopy_sequence (ENCODE_FILE (pattern)); |
987 | GCPRO1 (filename_string); | |
988 | tempfile = SSDATA (filename_string); | |
09494912 | 989 | |
94fcd171 PE |
990 | count = SPECPDL_INDEX (); |
991 | record_unwind_protect_nothing (); | |
992 | fd = mkostemp (tempfile, O_CLOEXEC); | |
993 | if (fd < 0) | |
994 | report_file_error ("Failed to open temporary file using pattern", | |
995 | pattern); | |
996 | set_unwind_protect (count, delete_temp_file, filename_string); | |
997 | record_unwind_protect_int (close_file_unwind, fd); | |
3c59b4c9 PE |
998 | } |
999 | ||
80856e74 JB |
1000 | start = args[0]; |
1001 | end = args[1]; | |
32d08644 | 1002 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
1003 | if (!NILP (Vcoding_system_for_write)) |
1004 | val = Vcoding_system_for_write; | |
4b4deea2 | 1005 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
fcaf8878 | 1006 | val = Qraw_text; |
32d08644 | 1007 | else |
beacaab3 | 1008 | { |
bafe80ce PE |
1009 | Lisp_Object coding_systems; |
1010 | Lisp_Object *args2; | |
3c59b4c9 | 1011 | USE_SAFE_ALLOCA; |
0065d054 | 1012 | SAFE_NALLOCA (args2, 1, nargs + 1); |
91489411 | 1013 | args2[0] = Qcall_process_region; |
bafe80ce | 1014 | memcpy (args2 + 1, args, nargs * sizeof *args); |
91489411 | 1015 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 1016 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
3c59b4c9 | 1017 | SAFE_FREE (); |
beacaab3 | 1018 | } |
fcaf8878 | 1019 | val = complement_process_encoding_system (val); |
32d08644 | 1020 | |
168afdaa | 1021 | { |
d311d28c | 1022 | ptrdiff_t count1 = SPECPDL_INDEX (); |
168afdaa RS |
1023 | |
1024 | specbind (intern ("coding-system-for-write"), val); | |
bb951f0e KR |
1025 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
1026 | happen to get a ".Z" suffix. */ | |
1027 | specbind (intern ("file-name-handler-alist"), Qnil); | |
94fcd171 | 1028 | write_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil, fd); |
168afdaa RS |
1029 | |
1030 | unbind_to (count1, Qnil); | |
1031 | } | |
91489411 | 1032 | |
94fcd171 PE |
1033 | if (lseek (fd, 0, SEEK_SET) < 0) |
1034 | report_file_error ("Setting file position", filename_string); | |
1035 | ||
177c0ea7 | 1036 | /* Note that Fcall_process takes care of binding |
91489411 | 1037 | coding-system-for-read. */ |
093650fe | 1038 | |
94fcd171 PE |
1039 | *filename_string_ptr = filename_string; |
1040 | UNGCPRO; | |
1041 | return fd; | |
bafe80ce PE |
1042 | } |
1043 | ||
1044 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
1045 | 3, MANY, 0, | |
1046 | doc: /* Send text from START to END to a synchronous process running PROGRAM. | |
1047 | The remaining arguments are optional. | |
1048 | Delete the text if fourth arg DELETE is non-nil. | |
1049 | ||
1050 | Insert output in BUFFER before point; t means current buffer; nil for | |
1051 | BUFFER means discard it; 0 means discard and don't wait; and `(:file | |
1052 | FILE)', where FILE is a file name string, means that it should be | |
1053 | written to that file (if the file already exists it is overwritten). | |
1054 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, | |
1055 | REAL-BUFFER says what to do with standard output, as above, | |
1056 | while STDERR-FILE says what to do with standard error in the child. | |
1057 | STDERR-FILE may be nil (discard standard error output), | |
1058 | t (mix it with ordinary output), or a file name string. | |
1059 | ||
1060 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
1061 | Remaining args are passed to PROGRAM at startup as command args. | |
1062 | ||
1063 | If BUFFER is 0, `call-process-region' returns immediately with value nil. | |
1064 | Otherwise it waits for PROGRAM to terminate | |
1065 | and returns a numeric exit status or a signal description string. | |
1066 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. | |
1067 | ||
1068 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) | |
1069 | (ptrdiff_t nargs, Lisp_Object *args) | |
1070 | { | |
4a88129a | 1071 | struct gcpro gcpro1; |
94fcd171 | 1072 | Lisp_Object infile, val; |
bafe80ce PE |
1073 | ptrdiff_t count = SPECPDL_INDEX (); |
1074 | Lisp_Object start = args[0]; | |
1075 | Lisp_Object end = args[1]; | |
1076 | bool empty_input; | |
94fcd171 | 1077 | int fd; |
bafe80ce PE |
1078 | |
1079 | if (STRINGP (start)) | |
1080 | empty_input = SCHARS (start) == 0; | |
1081 | else if (NILP (start)) | |
1082 | empty_input = BEG == Z; | |
1083 | else | |
1084 | { | |
1085 | validate_region (&args[0], &args[1]); | |
1086 | start = args[0]; | |
1087 | end = args[1]; | |
1088 | empty_input = XINT (start) == XINT (end); | |
1089 | } | |
1090 | ||
94fcd171 PE |
1091 | if (!empty_input) |
1092 | fd = create_temp_file (nargs, args, &infile); | |
1093 | else | |
1094 | { | |
1095 | infile = Qnil; | |
1096 | fd = emacs_open (NULL_DEVICE, O_RDONLY, 0); | |
1097 | if (fd < 0) | |
1098 | report_file_error ("Opening null device", Qnil); | |
1099 | record_unwind_protect_int (close_file_unwind, fd); | |
1100 | } | |
1101 | ||
4a88129a | 1102 | GCPRO1 (infile); |
80856e74 | 1103 | |
edf496dd | 1104 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
1105 | Fdelete_region (start, end); |
1106 | ||
edf496dd KH |
1107 | if (nargs > 3) |
1108 | { | |
1109 | args += 2; | |
1110 | nargs -= 2; | |
1111 | } | |
1112 | else | |
1113 | { | |
1114 | args[0] = args[2]; | |
1115 | nargs = 2; | |
1116 | } | |
50a30cce | 1117 | args[1] = infile; |
80856e74 | 1118 | |
4a88129a | 1119 | val = call_process (nargs, args, fd, empty_input ? -1 : count); |
94fcd171 | 1120 | RETURN_UNGCPRO (unbind_to (count, val)); |
80856e74 JB |
1121 | } |
1122 | \f | |
361358ea | 1123 | #ifndef WINDOWSNT |
971de7fb | 1124 | static int relocate_fd (int fd, int minfd); |
361358ea | 1125 | #endif |
dfcf069d | 1126 | |
5990851d KL |
1127 | static char ** |
1128 | add_env (char **env, char **new_env, char *string) | |
1129 | { | |
1130 | char **ep; | |
2f221583 | 1131 | bool ok = 1; |
5990851d KL |
1132 | if (string == NULL) |
1133 | return new_env; | |
1134 | ||
1135 | /* See if this string duplicates any string already in the env. | |
1136 | If so, don't put it in. | |
1137 | When an env var has multiple definitions, | |
1138 | we keep the definition that comes first in process-environment. */ | |
1139 | for (ep = env; ok && ep != new_env; ep++) | |
1140 | { | |
1141 | char *p = *ep, *q = string; | |
1142 | while (ok) | |
19ed11ba AS |
1143 | { |
1144 | if (*q != *p) | |
1145 | break; | |
1146 | if (*q == 0) | |
1147 | /* The string is a lone variable name; keep it for now, we | |
1148 | will remove it later. It is a placeholder for a | |
1149 | variable that is not to be included in the environment. */ | |
1150 | break; | |
1151 | if (*q == '=') | |
1152 | ok = 0; | |
1153 | p++, q++; | |
1154 | } | |
5990851d KL |
1155 | } |
1156 | if (ok) | |
1157 | *new_env++ = string; | |
1158 | return new_env; | |
1159 | } | |
1160 | ||
80856e74 JB |
1161 | /* This is the last thing run in a newly forked inferior |
1162 | either synchronous or asynchronous. | |
1163 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
1164 | Initialize inferior's priority, pgrp, connected dir and environment. | |
1165 | then exec another program based on new_argv. | |
1166 | ||
2f221583 | 1167 | If SET_PGRP, put the subprocess into a separate process group. |
e576cab4 JB |
1168 | |
1169 | CURRENT_DIR is an elisp string giving the path of the current | |
1170 | directory the subprocess should have. Since we can't really signal | |
1171 | a decent error from within the child, this should be verified as an | |
1172 | executable directory by the parent. */ | |
80856e74 | 1173 | |
dfcf069d | 1174 | int |
2f221583 PE |
1175 | child_setup (int in, int out, int err, char **new_argv, bool set_pgrp, |
1176 | Lisp_Object current_dir) | |
80856e74 | 1177 | { |
e576cab4 | 1178 | char **env; |
7fcf7f05 | 1179 | char *pwd_var; |
bad95d8f RS |
1180 | #ifdef WINDOWSNT |
1181 | int cpid; | |
4252a4bd | 1182 | HANDLE handles[3]; |
afacaa1b JB |
1183 | #else |
1184 | int exec_errno; | |
e576cab4 | 1185 | |
d311d28c | 1186 | pid_t pid = getpid (); |
afacaa1b | 1187 | #endif /* WINDOWSNT */ |
80856e74 | 1188 | |
80856e74 JB |
1189 | /* Note that use of alloca is always safe here. It's obvious for systems |
1190 | that do not have true vfork or that have true (stack) alloca. | |
caa01fe0 GM |
1191 | If using vfork and C_ALLOCA (when Emacs used to include |
1192 | src/alloca.c) it is safe because that changes the superior's | |
1193 | static variables as if the superior had done alloca and will be | |
1194 | cleaned up in the usual way. */ | |
e576cab4 | 1195 | { |
c365c355 PE |
1196 | char *temp; |
1197 | ptrdiff_t i; | |
77d78be1 | 1198 | |
d5db4077 | 1199 | i = SBYTES (current_dir); |
16425c4a EZ |
1200 | #ifdef MSDOS |
1201 | /* MSDOS must have all environment variables malloc'ed, because | |
1202 | low-level libc functions that launch subsidiary processes rely | |
1203 | on that. */ | |
c365c355 | 1204 | pwd_var = xmalloc (i + 5); |
16425c4a | 1205 | #else |
c365c355 | 1206 | pwd_var = alloca (i + 5); |
16425c4a | 1207 | #endif |
7fcf7f05 | 1208 | temp = pwd_var + 4; |
72af86bd | 1209 | memcpy (pwd_var, "PWD=", 4); |
c365c355 | 1210 | strcpy (temp, SSDATA (current_dir)); |
e576cab4 | 1211 | |
c17c4250 | 1212 | #ifndef DOS_NT |
e576cab4 JB |
1213 | /* We can't signal an Elisp error here; we're in a vfork. Since |
1214 | the callers check the current directory before forking, this | |
1215 | should only return an error if the directory's permissions | |
1216 | are changed between the check and this chdir, but we should | |
1217 | at least check. */ | |
1218 | if (chdir (temp) < 0) | |
4ebbdd67 | 1219 | _exit (EXIT_CANCELED); |
f8d23104 | 1220 | #else /* DOS_NT */ |
c17c4250 EZ |
1221 | /* Get past the drive letter, so that d:/ is left alone. */ |
1222 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
1223 | { | |
1224 | temp += 2; | |
1225 | i -= 2; | |
1226 | } | |
f8d23104 | 1227 | #endif /* DOS_NT */ |
c17c4250 | 1228 | |
7fcf7f05 | 1229 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 1230 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 1231 | temp[--i] = 0; |
e576cab4 | 1232 | } |
80856e74 | 1233 | |
5990851d | 1234 | /* Set `env' to a vector of the strings in the environment. */ |
80856e74 JB |
1235 | { |
1236 | register Lisp_Object tem; | |
1237 | register char **new_env; | |
5990851d | 1238 | char **p, **q; |
80856e74 | 1239 | register int new_length; |
d2bb6598 | 1240 | Lisp_Object display = Qnil; |
361358ea | 1241 | |
80856e74 | 1242 | new_length = 0; |
f105f403 | 1243 | |
80856e74 | 1244 | for (tem = Vprocess_environment; |
19ed11ba AS |
1245 | CONSP (tem) && STRINGP (XCAR (tem)); |
1246 | tem = XCDR (tem)) | |
d2bb6598 | 1247 | { |
42a5b22f | 1248 | if (strncmp (SSDATA (XCAR (tem)), "DISPLAY", 7) == 0 |
d2bb6598 SM |
1249 | && (SDATA (XCAR (tem)) [7] == '\0' |
1250 | || SDATA (XCAR (tem)) [7] == '=')) | |
1251 | /* DISPLAY is specified in process-environment. */ | |
1252 | display = Qt; | |
1253 | new_length++; | |
1254 | } | |
de87fb59 | 1255 | |
d2bb6598 SM |
1256 | /* If not provided yet, use the frame's DISPLAY. */ |
1257 | if (NILP (display)) | |
1258 | { | |
1259 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); | |
1260 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) | |
1261 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1262 | tmp = Fgetenv_internal (build_string ("DISPLAY"), | |
1263 | Vinitial_environment); | |
1264 | if (STRINGP (tmp)) | |
1265 | { | |
1266 | display = tmp; | |
1267 | new_length++; | |
1268 | } | |
1269 | } | |
80856e74 | 1270 | |
7fcf7f05 | 1271 | /* new_length + 2 to include PWD and terminating 0. */ |
38182d90 | 1272 | env = new_env = alloca ((new_length + 2) * sizeof *env); |
7fcf7f05 RS |
1273 | /* If we have a PWD envvar, pass one down, |
1274 | but with corrected value. */ | |
a13f8f50 | 1275 | if (egetenv ("PWD")) |
7fcf7f05 | 1276 | *new_env++ = pwd_var; |
361358ea | 1277 | |
6b8e474c | 1278 | if (STRINGP (display)) |
de87fb59 | 1279 | { |
38182d90 | 1280 | char *vdata = alloca (sizeof "DISPLAY=" + SBYTES (display)); |
de87fb59 | 1281 | strcpy (vdata, "DISPLAY="); |
42a5b22f | 1282 | strcat (vdata, SSDATA (display)); |
de87fb59 DN |
1283 | new_env = add_env (env, new_env, vdata); |
1284 | } | |
80856e74 | 1285 | |
5990851d | 1286 | /* Overrides. */ |
80856e74 | 1287 | for (tem = Vprocess_environment; |
70949dac KR |
1288 | CONSP (tem) && STRINGP (XCAR (tem)); |
1289 | tem = XCDR (tem)) | |
42a5b22f | 1290 | new_env = add_env (env, new_env, SSDATA (XCAR (tem))); |
d2bb6598 | 1291 | |
5990851d KL |
1292 | *new_env = 0; |
1293 | ||
1294 | /* Remove variable names without values. */ | |
1295 | p = q = env; | |
1296 | while (*p != 0) | |
cd9565ba | 1297 | { |
19ed11ba AS |
1298 | while (*q != 0 && strchr (*q, '=') == NULL) |
1299 | q++; | |
1300 | *p = *q++; | |
1301 | if (*p != 0) | |
1302 | p++; | |
cd9565ba | 1303 | } |
80856e74 | 1304 | } |
de87fb59 | 1305 | |
361358ea | 1306 | |
bad95d8f RS |
1307 | #ifdef WINDOWSNT |
1308 | prepare_standard_handles (in, out, err, handles); | |
d5db4077 | 1309 | set_process_dir (SDATA (current_dir)); |
d3d14b40 | 1310 | /* Spawn the child. (See w32proc.c:sys_spawnve). */ |
67802943 DN |
1311 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); |
1312 | reset_standard_handles (in, out, err, handles); | |
1313 | if (cpid == -1) | |
1314 | /* An error occurred while trying to spawn the process. */ | |
1315 | report_file_error ("Spawning child process", Qnil); | |
1316 | return cpid; | |
1317 | ||
bad95d8f | 1318 | #else /* not WINDOWSNT */ |
426b37ae JB |
1319 | /* Make sure that in, out, and err are not actually already in |
1320 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1321 | started with its standard in, out, or error closed, as might |
426b37ae | 1322 | happen under X. */ |
f29f9e4a RS |
1323 | { |
1324 | int oin = in, oout = out; | |
1325 | ||
1326 | /* We have to avoid relocating the same descriptor twice! */ | |
1327 | ||
1328 | in = relocate_fd (in, 3); | |
1329 | ||
1330 | if (out == oin) | |
1331 | out = in; | |
1332 | else | |
3e9367e7 | 1333 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1334 | |
1335 | if (err == oin) | |
1336 | err = in; | |
1337 | else if (err == oout) | |
1338 | err = out; | |
1339 | else | |
3e9367e7 | 1340 | err = relocate_fd (err, 3); |
f29f9e4a | 1341 | } |
426b37ae | 1342 | |
c17c4250 | 1343 | #ifndef MSDOS |
4700b5a5 PE |
1344 | /* Redirect file descriptors and clear the close-on-exec flag on the |
1345 | redirected ones. IN, OUT, and ERR are close-on-exec so they | |
1346 | need not be closed explicitly. */ | |
80856e74 JB |
1347 | dup2 (in, 0); |
1348 | dup2 (out, 1); | |
1349 | dup2 (err, 2); | |
067428c1 | 1350 | |
dd0333b6 | 1351 | setpgid (0, 0); |
12e610e8 | 1352 | tcsetpgrp (0, pid); |
a7ebc409 | 1353 | |
21e54a94 | 1354 | execve (new_argv[0], new_argv, env); |
ee010797 | 1355 | exec_errno = errno; |
80856e74 | 1356 | |
ee010797 PE |
1357 | /* Avoid deadlock if the child's perror writes to a full pipe; the |
1358 | pipe's reader is the parent, but with vfork the parent can't | |
1359 | run until the child exits. Truncate the diagnostic instead. */ | |
1360 | fcntl (STDERR_FILENO, F_SETFL, O_NONBLOCK); | |
4ebbdd67 | 1361 | |
ee010797 PE |
1362 | errno = exec_errno; |
1363 | emacs_perror (new_argv[0]); | |
1364 | _exit (exec_errno == ENOENT ? EXIT_ENOENT : EXIT_CANNOT_INVOKE); | |
67802943 DN |
1365 | |
1366 | #else /* MSDOS */ | |
1367 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
1368 | xfree (pwd_var); | |
1369 | if (pid == -1) | |
1370 | /* An error occurred while trying to run the subprocess. */ | |
1371 | report_file_error ("Spawning child process", Qnil); | |
1372 | return pid; | |
1373 | #endif /* MSDOS */ | |
ae76d9e1 | 1374 | #endif /* not WINDOWSNT */ |
80856e74 JB |
1375 | } |
1376 | ||
361358ea | 1377 | #ifndef WINDOWSNT |
a3833dfe | 1378 | /* Move the file descriptor FD so that its number is not less than MINFD. |
4700b5a5 PE |
1379 | If the file descriptor is moved at all, the original is closed on MSDOS, |
1380 | but not elsewhere as the caller will close it anyway. */ | |
dfcf069d | 1381 | static int |
971de7fb | 1382 | relocate_fd (int fd, int minfd) |
426b37ae | 1383 | { |
a3833dfe | 1384 | if (fd >= minfd) |
426b37ae JB |
1385 | return fd; |
1386 | else | |
1387 | { | |
067428c1 | 1388 | int new = fcntl (fd, F_DUPFD_CLOEXEC, minfd); |
426b37ae JB |
1389 | if (new == -1) |
1390 | { | |
4ebbdd67 PE |
1391 | emacs_perror ("while setting up child"); |
1392 | _exit (EXIT_CANCELED); | |
426b37ae | 1393 | } |
4700b5a5 | 1394 | #ifdef MSDOS |
68c45bf0 | 1395 | emacs_close (fd); |
4700b5a5 | 1396 | #endif |
426b37ae JB |
1397 | return new; |
1398 | } | |
1399 | } | |
361358ea | 1400 | #endif /* not WINDOWSNT */ |
426b37ae | 1401 | |
2f221583 | 1402 | static bool |
989f33ba PE |
1403 | getenv_internal_1 (const char *var, ptrdiff_t varlen, char **value, |
1404 | ptrdiff_t *valuelen, Lisp_Object env) | |
012c6fcb | 1405 | { |
db699fc6 | 1406 | for (; CONSP (env); env = XCDR (env)) |
012c6fcb | 1407 | { |
db699fc6 | 1408 | Lisp_Object entry = XCAR (env); |
d50d3dc8 | 1409 | if (STRINGP (entry) |
db699fc6 | 1410 | && SBYTES (entry) >= varlen |
bad95d8f RS |
1411 | #ifdef WINDOWSNT |
1412 | /* NT environment variables are case insensitive. */ | |
d5db4077 | 1413 | && ! strnicmp (SDATA (entry), var, varlen) |
bad95d8f | 1414 | #else /* not WINDOWSNT */ |
72af86bd | 1415 | && ! memcmp (SDATA (entry), var, varlen) |
bad95d8f | 1416 | #endif /* not WINDOWSNT */ |
a9971c6d | 1417 | ) |
012c6fcb | 1418 | { |
db699fc6 SM |
1419 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') |
1420 | { | |
51b59d79 | 1421 | *value = SSDATA (entry) + (varlen + 1); |
db699fc6 SM |
1422 | *valuelen = SBYTES (entry) - (varlen + 1); |
1423 | return 1; | |
1424 | } | |
1425 | else if (SBYTES (entry) == varlen) | |
1426 | { | |
1427 | /* Lone variable names in Vprocess_environment mean that | |
1428 | variable should be removed from the environment. */ | |
1429 | *value = NULL; | |
1430 | return 1; | |
1431 | } | |
1432 | } | |
1433 | } | |
1434 | return 0; | |
1435 | } | |
1436 | ||
2f221583 | 1437 | static bool |
989f33ba PE |
1438 | getenv_internal (const char *var, ptrdiff_t varlen, char **value, |
1439 | ptrdiff_t *valuelen, Lisp_Object frame) | |
012c6fcb | 1440 | { |
d2bb6598 SM |
1441 | /* Try to find VAR in Vprocess_environment first. */ |
1442 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1443 | Vprocess_environment)) | |
1444 | return *value ? 1 : 0; | |
f105f403 | 1445 | |
d2bb6598 | 1446 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
de87fb59 | 1447 | if (strcmp (var, "DISPLAY") == 0) |
d2bb6598 SM |
1448 | { |
1449 | Lisp_Object display | |
1450 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); | |
1451 | if (STRINGP (display)) | |
1452 | { | |
51b59d79 | 1453 | *value = SSDATA (display); |
de87fb59 | 1454 | *valuelen = SBYTES (display); |
012c6fcb JA |
1455 | return 1; |
1456 | } | |
d2bb6598 SM |
1457 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
1458 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1459 | Vinitial_environment)) | |
1460 | return *value ? 1 : 0; | |
012c6fcb JA |
1461 | } |
1462 | ||
1463 | return 0; | |
1464 | } | |
1465 | ||
f105f403 | 1466 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
5990851d KL |
1467 | doc: /* Get the value of environment variable VARIABLE. |
1468 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
1469 | the environment. Otherwise, value is a string. | |
f105f403 | 1470 | |
acf20901 | 1471 | This function searches `process-environment' for VARIABLE. |
5990851d | 1472 | |
db699fc6 | 1473 | If optional parameter ENV is a list, then search this list instead of |
acf20901 JB |
1474 | `process-environment', and return t when encountering a negative entry |
1475 | \(an entry for a variable with no value). */) | |
5842a27b | 1476 | (Lisp_Object variable, Lisp_Object env) |
012c6fcb JA |
1477 | { |
1478 | char *value; | |
989f33ba | 1479 | ptrdiff_t valuelen; |
012c6fcb | 1480 | |
5990851d | 1481 | CHECK_STRING (variable); |
db699fc6 SM |
1482 | if (CONSP (env)) |
1483 | { | |
42a5b22f | 1484 | if (getenv_internal_1 (SSDATA (variable), SBYTES (variable), |
db699fc6 SM |
1485 | &value, &valuelen, env)) |
1486 | return value ? make_string (value, valuelen) : Qt; | |
1487 | else | |
1488 | return Qnil; | |
1489 | } | |
42a5b22f | 1490 | else if (getenv_internal (SSDATA (variable), SBYTES (variable), |
d2bb6598 | 1491 | &value, &valuelen, env)) |
012c6fcb JA |
1492 | return make_string (value, valuelen); |
1493 | else | |
1494 | return Qnil; | |
1495 | } | |
1496 | ||
5990851d KL |
1497 | /* A version of getenv that consults the Lisp environment lists, |
1498 | easily callable from C. */ | |
012c6fcb | 1499 | char * |
a8fe7202 | 1500 | egetenv (const char *var) |
012c6fcb JA |
1501 | { |
1502 | char *value; | |
25c7e41f | 1503 | ptrdiff_t valuelen; |
012c6fcb | 1504 | |
f105f403 | 1505 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
012c6fcb JA |
1506 | return value; |
1507 | else | |
1508 | return 0; | |
1509 | } | |
1510 | ||
80856e74 | 1511 | \f |
8de15d69 | 1512 | /* This is run before init_cmdargs. */ |
177c0ea7 | 1513 | |
dfcf069d | 1514 | void |
971de7fb | 1515 | init_callproc_1 (void) |
8de15d69 | 1516 | { |
d01ba2f1 GM |
1517 | #ifdef HAVE_NS |
1518 | const char *etc_dir = ns_etc_directory (); | |
cbb31951 | 1519 | const char *path_exec = ns_exec_path (); |
d01ba2f1 | 1520 | #endif |
35a2f4b8 | 1521 | |
76151e2c | 1522 | Vdata_directory = decode_env_path ("EMACSDATA", |
d01ba2f1 | 1523 | #ifdef HAVE_NS |
76151e2c | 1524 | etc_dir ? etc_dir : |
d01ba2f1 | 1525 | #endif |
76151e2c EZ |
1526 | PATH_DATA); |
1527 | Vdata_directory = Ffile_name_as_directory (Fcar (Vdata_directory)); | |
1528 | ||
1529 | Vdoc_directory = decode_env_path ("EMACSDOC", | |
d01ba2f1 | 1530 | #ifdef HAVE_NS |
76151e2c | 1531 | etc_dir ? etc_dir : |
d01ba2f1 | 1532 | #endif |
76151e2c EZ |
1533 | PATH_DOC); |
1534 | Vdoc_directory = Ffile_name_as_directory (Fcar (Vdoc_directory)); | |
9453ea7b | 1535 | |
e576cab4 | 1536 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1537 | PATH_EXEC path from epaths.h. */ |
cbb31951 GM |
1538 | Vexec_path = decode_env_path ("EMACSPATH", |
1539 | #ifdef HAVE_NS | |
1540 | path_exec ? path_exec : | |
1541 | #endif | |
1542 | PATH_EXEC); | |
80856e74 | 1543 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
cbb31951 | 1544 | /* FIXME? For ns, path_exec should go at the front? */ |
80856e74 | 1545 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); |
8de15d69 RS |
1546 | } |
1547 | ||
e17f7533 | 1548 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1549 | |
dfcf069d | 1550 | void |
971de7fb | 1551 | init_callproc (void) |
8de15d69 RS |
1552 | { |
1553 | char *data_dir = egetenv ("EMACSDATA"); | |
177c0ea7 | 1554 | |
8de15d69 RS |
1555 | register char * sh; |
1556 | Lisp_Object tempdir; | |
d01ba2f1 GM |
1557 | #ifdef HAVE_NS |
1558 | if (data_dir == 0) | |
1559 | { | |
1560 | const char *etc_dir = ns_etc_directory (); | |
1561 | if (etc_dir) | |
1562 | { | |
1563 | data_dir = alloca (strlen (etc_dir) + 1); | |
1564 | strcpy (data_dir, etc_dir); | |
1565 | } | |
1566 | } | |
1567 | #endif | |
8de15d69 | 1568 | |
9cc4fad5 | 1569 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1570 | { |
05630743 RS |
1571 | /* Add to the path the lib-src subdir of the installation dir. */ |
1572 | Lisp_Object tem; | |
1573 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1574 | Vinstallation_directory); | |
76151e2c | 1575 | #ifndef MSDOS |
1a6640ec | 1576 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc | 1577 | if (NILP (Fmember (tem, Vexec_path))) |
70ec1377 | 1578 | { |
cbb31951 GM |
1579 | #ifdef HAVE_NS |
1580 | const char *path_exec = ns_exec_path (); | |
1581 | #endif | |
1582 | Vexec_path = decode_env_path ("EMACSPATH", | |
1583 | #ifdef HAVE_NS | |
1584 | path_exec ? path_exec : | |
1585 | #endif | |
1586 | PATH_EXEC); | |
70ec1377 RS |
1587 | Vexec_path = Fcons (tem, Vexec_path); |
1588 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
1589 | } | |
177c0ea7 | 1590 | |
0fa248bc | 1591 | Vexec_directory = Ffile_name_as_directory (tem); |
76151e2c | 1592 | #endif /* not MSDOS */ |
8de15d69 | 1593 | |
e17f7533 RS |
1594 | /* Maybe use ../etc as well as ../lib-src. */ |
1595 | if (data_dir == 0) | |
1596 | { | |
1597 | tem = Fexpand_file_name (build_string ("etc"), | |
1598 | Vinstallation_directory); | |
1599 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1600 | } |
1601 | } | |
7e933683 RS |
1602 | |
1603 | /* Look for the files that should be in etc. We don't use | |
1604 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1605 | near the executable, and they are never in the build |
7e933683 RS |
1606 | directory when that's different from the source directory. |
1607 | ||
1608 | Instead, if these files are not in the nominal place, we try the | |
1609 | source directory. */ | |
1610 | if (data_dir == 0) | |
1611 | { | |
70ec1377 | 1612 | Lisp_Object tem, tem1, srcdir; |
7e933683 | 1613 | |
70ec1377 RS |
1614 | srcdir = Fexpand_file_name (build_string ("../src/"), |
1615 | build_string (PATH_DUMPLOADSEARCH)); | |
7e933683 RS |
1616 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); |
1617 | tem1 = Ffile_exists_p (tem); | |
70ec1377 | 1618 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
7e933683 | 1619 | { |
70ec1377 | 1620 | Lisp_Object newdir; |
7e933683 RS |
1621 | newdir = Fexpand_file_name (build_string ("../etc/"), |
1622 | build_string (PATH_DUMPLOADSEARCH)); | |
1623 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1624 | tem1 = Ffile_exists_p (tem); | |
1625 | if (!NILP (tem1)) | |
1626 | Vdata_directory = newdir; | |
1627 | } | |
1628 | } | |
80856e74 | 1629 | |
d883eb62 RS |
1630 | #ifndef CANNOT_DUMP |
1631 | if (initialized) | |
1632 | #endif | |
1633 | { | |
1634 | tempdir = Fdirectory_file_name (Vexec_directory); | |
73dcdb9f PE |
1635 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
1636 | dir_warning ("arch-dependent data dir", Vexec_directory); | |
d883eb62 | 1637 | } |
80856e74 | 1638 | |
e576cab4 | 1639 | tempdir = Fdirectory_file_name (Vdata_directory); |
73dcdb9f PE |
1640 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
1641 | dir_warning ("arch-independent data dir", Vdata_directory); | |
e576cab4 | 1642 | |
83be8524 | 1643 | sh = getenv ("SHELL"); |
80856e74 | 1644 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
8abd035b | 1645 | |
40b49d4b JB |
1646 | #ifdef DOS_NT |
1647 | Vshared_game_score_directory = Qnil; | |
1648 | #else | |
63789758 | 1649 | Vshared_game_score_directory = build_string (PATH_GAME); |
73dcdb9f | 1650 | if (NILP (Ffile_accessible_directory_p (Vshared_game_score_directory))) |
63789758 | 1651 | Vshared_game_score_directory = Qnil; |
40b49d4b | 1652 | #endif |
9fefd2ba JB |
1653 | } |
1654 | ||
dfcf069d | 1655 | void |
971de7fb | 1656 | set_initial_environment (void) |
9fefd2ba | 1657 | { |
738db178 DN |
1658 | char **envp; |
1659 | for (envp = environ; *envp; envp++) | |
1660 | Vprocess_environment = Fcons (build_string (*envp), | |
1661 | Vprocess_environment); | |
1662 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent | |
1663 | to use `delete' and friends on process-environment. */ | |
1664 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); | |
80856e74 JB |
1665 | } |
1666 | ||
dfcf069d | 1667 | void |
971de7fb | 1668 | syms_of_callproc (void) |
80856e74 | 1669 | { |
f92d51d8 CY |
1670 | #ifndef DOS_NT |
1671 | Vtemp_file_name_pattern = build_string ("emacsXXXXXX"); | |
1672 | #elif defined (WINDOWSNT) | |
1673 | Vtemp_file_name_pattern = build_string ("emXXXXXX"); | |
1674 | #else | |
1675 | Vtemp_file_name_pattern = build_string ("detmp.XXX"); | |
1676 | #endif | |
1677 | staticpro (&Vtemp_file_name_pattern); | |
1678 | ||
94fcd171 PE |
1679 | #ifdef MSDOS |
1680 | synch_process_tempfile = make_number (0); | |
1681 | staticpro (&synch_process_tempfile); | |
1682 | #endif | |
1683 | ||
29208e82 | 1684 | DEFVAR_LISP ("shell-file-name", Vshell_file_name, |
fb7ada5f | 1685 | doc: /* File name to load inferior shells from. |
b20b29be EZ |
1686 | Initialized from the SHELL environment variable, or to a system-dependent |
1687 | default if SHELL is not set. */); | |
80856e74 | 1688 | |
29208e82 | 1689 | DEFVAR_LISP ("exec-path", Vexec_path, |
fb7ada5f | 1690 | doc: /* List of directories to search programs to run in subprocesses. |
fdb82f93 | 1691 | Each element is a string (directory name) or nil (try default directory). */); |
80856e74 | 1692 | |
29208e82 | 1693 | DEFVAR_LISP ("exec-suffixes", Vexec_suffixes, |
fb7ada5f | 1694 | doc: /* List of suffixes to try to find executable file names. |
fdb82f93 | 1695 | Each element is a string. */); |
33d5af99 | 1696 | Vexec_suffixes = Qnil; |
b81a1b72 | 1697 | |
29208e82 | 1698 | DEFVAR_LISP ("exec-directory", Vexec_directory, |
fdb82f93 PJ |
1699 | doc: /* Directory for executables for Emacs to invoke. |
1700 | More generally, this includes any architecture-dependent files | |
1701 | that are built and installed from the Emacs distribution. */); | |
e576cab4 | 1702 | |
29208e82 | 1703 | DEFVAR_LISP ("data-directory", Vdata_directory, |
fdb82f93 PJ |
1704 | doc: /* Directory of machine-independent files that come with GNU Emacs. |
1705 | These are files intended for Emacs to use while it runs. */); | |
80856e74 | 1706 | |
29208e82 | 1707 | DEFVAR_LISP ("doc-directory", Vdoc_directory, |
fdb82f93 | 1708 | doc: /* Directory containing the DOC file that comes with GNU Emacs. |
ebf24b59 | 1709 | This is usually the same as `data-directory'. */); |
35a2f4b8 | 1710 | |
29208e82 | 1711 | DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory, |
fdb82f93 PJ |
1712 | doc: /* For internal use by the build procedure only. |
1713 | This is the name of the directory in which the build procedure installed | |
ebf24b59 | 1714 | Emacs's info files; the default value for `Info-default-directory-list' |
fdb82f93 | 1715 | includes this. */); |
ed61592a JB |
1716 | Vconfigure_info_directory = build_string (PATH_INFO); |
1717 | ||
29208e82 | 1718 | DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory, |
b065672a CW |
1719 | doc: /* Directory of score files for games which come with GNU Emacs. |
1720 | If this variable is nil, then Emacs is unable to use a shared directory. */); | |
40b49d4b JB |
1721 | #ifdef DOS_NT |
1722 | Vshared_game_score_directory = Qnil; | |
1723 | #else | |
63789758 | 1724 | Vshared_game_score_directory = build_string (PATH_GAME); |
40b49d4b | 1725 | #endif |
b065672a | 1726 | |
29208e82 | 1727 | DEFVAR_LISP ("initial-environment", Vinitial_environment, |
6b8e474c SM |
1728 | doc: /* List of environment variables inherited from the parent process. |
1729 | Each element should be a string of the form ENVVARNAME=VALUE. | |
1730 | The elements must normally be decoded (using `locale-coding-system') for use. */); | |
1731 | Vinitial_environment = Qnil; | |
1732 | ||
29208e82 | 1733 | DEFVAR_LISP ("process-environment", Vprocess_environment, |
5990851d | 1734 | doc: /* List of overridden environment variables for subprocesses to inherit. |
fdb82f93 | 1735 | Each element should be a string of the form ENVVARNAME=VALUE. |
5990851d | 1736 | |
a13f8f50 KL |
1737 | Entries in this list take precedence to those in the frame-local |
1738 | environments. Therefore, let-binding `process-environment' is an easy | |
1739 | way to temporarily change the value of an environment variable, | |
1740 | irrespective of where it comes from. To use `process-environment' to | |
1741 | remove an environment variable, include only its name in the list, | |
1742 | without "=VALUE". | |
5990851d KL |
1743 | |
1744 | This variable is set to nil when Emacs starts. | |
1745 | ||
fdb82f93 PJ |
1746 | If multiple entries define the same variable, the first one always |
1747 | takes precedence. | |
5990851d | 1748 | |
776a24a1 | 1749 | Non-ASCII characters are encoded according to the initial value of |
5990851d KL |
1750 | `locale-coding-system', i.e. the elements must normally be decoded for |
1751 | use. | |
1752 | ||
776a24a1 | 1753 | See `setenv' and `getenv'. */); |
86f5ca04 | 1754 | Vprocess_environment = Qnil; |
80856e74 | 1755 | |
80856e74 | 1756 | defsubr (&Scall_process); |
83fa009c | 1757 | defsubr (&Sgetenv_internal); |
e576cab4 | 1758 | defsubr (&Scall_process_region); |
80856e74 | 1759 | } |