Commit | Line | Data |
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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 | 85 | static Lisp_Object synch_process_tempfile; |
94fcd171 PE |
86 | |
87 | /* Indexes of file descriptors that need closing on call_process_kill. */ | |
88 | enum | |
89 | { | |
90 | /* The subsidiary process's stdout and stderr. stdin is handled | |
91 | separately, in either Fcall_process_region or create_temp_file. */ | |
92 | CALLPROC_STDOUT, CALLPROC_STDERR, | |
93 | ||
94 | /* How to read from a pipe (or substitute) from the subsidiary process. */ | |
95 | CALLPROC_PIPEREAD, | |
96 | ||
97 | /* A bound on the number of file descriptors. */ | |
98 | CALLPROC_FDS | |
99 | }; | |
100 | ||
5d1922cd | 101 | static Lisp_Object call_process (ptrdiff_t, Lisp_Object *, int *, Lisp_Object *); |
bb5f74ee | 102 | \f |
c365c355 PE |
103 | /* Return the current buffer's working directory, or the home |
104 | directory if it's unreachable, as a string suitable for a system call. | |
105 | Signal an error if the result would not be an accessible directory. */ | |
106 | ||
107 | Lisp_Object | |
108 | encode_current_directory (void) | |
109 | { | |
110 | Lisp_Object dir; | |
111 | struct gcpro gcpro1; | |
112 | ||
113 | dir = BVAR (current_buffer, directory); | |
114 | GCPRO1 (dir); | |
115 | ||
116 | dir = Funhandled_file_name_directory (dir); | |
117 | ||
118 | /* If the file name handler says that dir is unreachable, use | |
119 | a sensible default. */ | |
120 | if (NILP (dir)) | |
121 | dir = build_string ("~"); | |
122 | ||
123 | dir = expand_and_dir_to_file (dir, Qnil); | |
124 | ||
125 | if (STRING_MULTIBYTE (dir)) | |
126 | dir = ENCODE_FILE (dir); | |
127 | if (! file_accessible_directory_p (SSDATA (dir))) | |
128 | report_file_error ("Setting current directory", | |
129 | BVAR (current_buffer, directory)); | |
130 | ||
131 | RETURN_UNGCPRO (dir); | |
132 | } | |
133 | ||
35fb8050 PE |
134 | /* If P is reapable, record it as a deleted process and kill it. |
135 | Do this in a critical section. Unless PID is wedged it will be | |
136 | reaped on receipt of the first SIGCHLD after the critical section. */ | |
137 | ||
138 | void | |
94fcd171 | 139 | record_kill_process (struct Lisp_Process *p, Lisp_Object tempfile) |
35fb8050 | 140 | { |
bf6b4923 | 141 | #ifndef MSDOS |
1e952f0a PE |
142 | sigset_t oldset; |
143 | block_child_signal (&oldset); | |
35fb8050 PE |
144 | |
145 | if (p->alive) | |
146 | { | |
94fcd171 | 147 | record_deleted_pid (p->pid, tempfile); |
35fb8050 | 148 | p->alive = 0; |
d983a10b | 149 | kill (- p->pid, SIGKILL); |
35fb8050 PE |
150 | } |
151 | ||
1e952f0a | 152 | unblock_child_signal (&oldset); |
bf6b4923 | 153 | #endif /* !MSDOS */ |
35fb8050 PE |
154 | } |
155 | ||
94fcd171 PE |
156 | /* Clean up files, file descriptors and processes created by Fcall_process. */ |
157 | ||
158 | static void | |
5d1922cd | 159 | delete_temp_file_ptr (Lisp_Object *name_ptr) |
94fcd171 | 160 | { |
5d1922cd BT |
161 | Lisp_Object name = *name_ptr; |
162 | if (! NILP (name)) | |
163 | unlink (SSDATA (name)); | |
94fcd171 | 164 | } |
37d54121 | 165 | |
27e498e6 | 166 | static void |
94fcd171 | 167 | call_process_kill (void *ptr) |
d177f194 | 168 | { |
94fcd171 PE |
169 | int *callproc_fd = ptr; |
170 | int i; | |
171 | for (i = 0; i < CALLPROC_FDS; i++) | |
172 | if (0 <= callproc_fd[i]) | |
173 | emacs_close (callproc_fd[i]); | |
bb5f74ee | 174 | |
bb5f74ee PE |
175 | if (synch_process_pid) |
176 | { | |
35fb8050 PE |
177 | struct Lisp_Process proc; |
178 | proc.alive = 1; | |
179 | proc.pid = synch_process_pid; | |
94fcd171 PE |
180 | record_kill_process (&proc, synch_process_tempfile); |
181 | synch_process_pid = 0; | |
bb5f74ee | 182 | } |
94fcd171 | 183 | else if (STRINGP (synch_process_tempfile)) |
5d1922cd | 184 | delete_temp_file_ptr (&synch_process_tempfile); |
d177f194 JB |
185 | } |
186 | ||
94fcd171 PE |
187 | /* Clean up when exiting Fcall_process: restore the buffer, and |
188 | kill the subsidiary process group if the process still exists. */ | |
bb5f74ee | 189 | |
27e498e6 | 190 | static void |
94fcd171 | 191 | call_process_cleanup (Lisp_Object buffer) |
80856e74 | 192 | { |
bb5f74ee | 193 | Fset_buffer (buffer); |
d177f194 | 194 | |
bf6b4923 | 195 | #ifndef MSDOS |
bb5f74ee | 196 | if (synch_process_pid) |
d177f194 | 197 | { |
d983a10b | 198 | kill (-synch_process_pid, SIGINT); |
d177f194 JB |
199 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); |
200 | immediate_quit = 1; | |
201 | QUIT; | |
bb5f74ee PE |
202 | wait_for_termination (synch_process_pid, 0, 1); |
203 | synch_process_pid = 0; | |
d177f194 | 204 | immediate_quit = 0; |
d177f194 JB |
205 | message1 ("Waiting for process to die...done"); |
206 | } | |
bf6b4923 | 207 | #endif /* !MSDOS */ |
80856e74 JB |
208 | } |
209 | ||
406af475 PE |
210 | #ifdef DOS_NT |
211 | static mode_t const default_output_mode = S_IREAD | S_IWRITE; | |
212 | #else | |
213 | static mode_t const default_output_mode = 0666; | |
214 | #endif | |
215 | ||
a7ca3326 | 216 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, |
fdb82f93 PJ |
217 | doc: /* Call PROGRAM synchronously in separate process. |
218 | The remaining arguments are optional. | |
219 | The program's input comes from file INFILE (nil means `/dev/null'). | |
38cd43eb | 220 | Insert output in DESTINATION before point; t means current buffer; nil for DESTINATION |
1ef14cb4 | 221 | means discard it; 0 means discard and don't wait; and `(:file FILE)', where |
1b9f60cc GM |
222 | FILE is a file name string, means that it should be written to that file |
223 | \(if the file already exists it is overwritten). | |
38cd43eb | 224 | DESTINATION can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
fdb82f93 PJ |
225 | REAL-BUFFER says what to do with standard output, as above, |
226 | while STDERR-FILE says what to do with standard error in the child. | |
227 | STDERR-FILE may be nil (discard standard error output), | |
228 | t (mix it with ordinary output), or a file name string. | |
229 | ||
230 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
231 | Remaining arguments are strings passed as command arguments to PROGRAM. | |
232 | ||
a4feb144 RS |
233 | If executable PROGRAM can't be found as an executable, `call-process' |
234 | signals a Lisp error. `call-process' reports errors in execution of | |
235 | the program only through its return and output. | |
236 | ||
38cd43eb | 237 | If DESTINATION is 0, `call-process' returns immediately with value nil. |
fdb82f93 PJ |
238 | Otherwise it waits for PROGRAM to terminate |
239 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
240 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
241 | ||
38cd43eb | 242 | usage: (call-process PROGRAM &optional INFILE DESTINATION DISPLAY &rest ARGS) */) |
f66c7cf8 | 243 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 244 | { |
94fcd171 PE |
245 | Lisp_Object infile, encoded_infile; |
246 | int filefd; | |
247 | struct gcpro gcpro1; | |
248 | ptrdiff_t count = SPECPDL_INDEX (); | |
249 | ||
250 | if (nargs >= 2 && ! NILP (args[1])) | |
251 | { | |
252 | infile = Fexpand_file_name (args[1], BVAR (current_buffer, directory)); | |
253 | CHECK_STRING (infile); | |
254 | } | |
255 | else | |
256 | infile = build_string (NULL_DEVICE); | |
257 | ||
258 | GCPRO1 (infile); | |
259 | encoded_infile = STRING_MULTIBYTE (infile) ? ENCODE_FILE (infile) : infile; | |
260 | ||
261 | filefd = emacs_open (SSDATA (encoded_infile), O_RDONLY, 0); | |
262 | if (filefd < 0) | |
263 | report_file_error ("Opening process input file", infile); | |
5d1922cd | 264 | record_unwind_protect_ptr (close_file_ptr_unwind, &filefd); |
94fcd171 | 265 | UNGCPRO; |
5d1922cd | 266 | return unbind_to (count, call_process (nargs, args, &filefd, NULL)); |
94fcd171 PE |
267 | } |
268 | ||
269 | /* Like Fcall_process (NARGS, ARGS), except use FILEFD as the input file. | |
4a88129a PE |
270 | |
271 | If TEMPFILE_INDEX is nonnegative, it is the specpdl index of an | |
272 | unwinder that is intended to remove the input temporary file; in | |
273 | this case NARGS must be at least 2 and ARGS[1] is the file's name. | |
274 | ||
94fcd171 PE |
275 | At entry, the specpdl stack top entry must be close_file_unwind (FILEFD). */ |
276 | ||
277 | static Lisp_Object | |
5d1922cd | 278 | call_process (ptrdiff_t nargs, Lisp_Object *args, int *filefd, Lisp_Object *tempfile_ptr) |
94fcd171 PE |
279 | { |
280 | Lisp_Object buffer, current_dir, path; | |
2f221583 | 281 | bool display_p; |
94fcd171 PE |
282 | int fd0; |
283 | int callproc_fd[CALLPROC_FDS]; | |
bb5f74ee | 284 | int status; |
94fcd171 | 285 | ptrdiff_t i; |
d311d28c PE |
286 | ptrdiff_t count = SPECPDL_INDEX (); |
287 | USE_SAFE_ALLOCA; | |
2d607244 | 288 | |
60aeceb8 | 289 | char **new_argv; |
39eaa782 RS |
290 | /* File to use for stderr in the child. |
291 | t means use same as standard output. */ | |
292 | Lisp_Object error_file; | |
1ef14cb4 | 293 | Lisp_Object output_file = Qnil; |
7e6c2178 | 294 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
94fcd171 | 295 | char *tempfile = NULL; |
d311d28c PE |
296 | int pid; |
297 | #else | |
1e952f0a | 298 | sigset_t oldset; |
d311d28c | 299 | pid_t pid; |
80856e74 | 300 | #endif |
bb5f74ee | 301 | int child_errno; |
94fcd171 | 302 | int fd_output, fd_error; |
32d08644 KH |
303 | struct coding_system process_coding; /* coding-system of process output */ |
304 | struct coding_system argument_coding; /* coding-system of arguments */ | |
09494912 RS |
305 | /* Set to the return value of Ffind_operation_coding_system. */ |
306 | Lisp_Object coding_systems; | |
94fcd171 PE |
307 | bool discard_output; |
308 | ||
309 | if (synch_process_pid) | |
310 | error ("call-process invoked recursively"); | |
09494912 RS |
311 | |
312 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ | |
313 | coding_systems = Qt; | |
32d08644 | 314 | |
b7826503 | 315 | CHECK_STRING (args[0]); |
80856e74 | 316 | |
39eaa782 RS |
317 | error_file = Qt; |
318 | ||
7e6c2178 RS |
319 | #ifndef subprocesses |
320 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
177c0ea7 | 321 | if (nargs >= 3 |
09ffb8b5 | 322 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
323 | error ("Operating system cannot handle asynchronous subprocesses"); |
324 | #endif /* subprocesses */ | |
325 | ||
09494912 | 326 | /* Decide the coding-system for giving arguments. */ |
32d08644 KH |
327 | { |
328 | Lisp_Object val, *args2; | |
32d08644 KH |
329 | |
330 | /* If arguments are supplied, we may have to encode them. */ | |
331 | if (nargs >= 5) | |
332 | { | |
2f221583 | 333 | bool must_encode = 0; |
6e50da0a | 334 | Lisp_Object coding_attrs; |
30d57b8e | 335 | |
e7c1c20e | 336 | for (i = 4; i < nargs; i++) |
b7826503 | 337 | CHECK_STRING (args[i]); |
e7c1c20e | 338 | |
a2286b5c | 339 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
340 | if (STRING_MULTIBYTE (args[i])) |
341 | must_encode = 1; | |
342 | ||
beacaab3 KH |
343 | if (!NILP (Vcoding_system_for_write)) |
344 | val = Vcoding_system_for_write; | |
30d57b8e | 345 | else if (! must_encode) |
fcaf8878 | 346 | val = Qraw_text; |
beacaab3 | 347 | else |
32d08644 | 348 | { |
0065d054 | 349 | SAFE_NALLOCA (args2, 1, nargs + 1); |
32d08644 KH |
350 | args2[0] = Qcall_process; |
351 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 352 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 353 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
32d08644 | 354 | } |
fcaf8878 | 355 | val = complement_process_encoding_system (val); |
32d08644 | 356 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); |
6e50da0a KH |
357 | coding_attrs = CODING_ID_ATTRS (argument_coding.id); |
358 | if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs))) | |
359 | { | |
360 | /* We should not use an ASCII incompatible coding system. */ | |
361 | val = raw_text_coding_system (val); | |
362 | setup_coding_system (val, &argument_coding); | |
363 | } | |
32d08644 | 364 | } |
32d08644 KH |
365 | } |
366 | ||
94fcd171 PE |
367 | if (nargs < 3) |
368 | buffer = Qnil; | |
80856e74 | 369 | else |
e576cab4 | 370 | { |
39eaa782 RS |
371 | buffer = args[2]; |
372 | ||
1ef14cb4 LMI |
373 | /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT |
374 | FILE-FOR-STDERR), unless the first element is :file, in which case see | |
375 | the next paragraph. */ | |
94fcd171 | 376 | if (CONSP (buffer) && !EQ (XCAR (buffer), QCfile)) |
39eaa782 | 377 | { |
70949dac | 378 | if (CONSP (XCDR (buffer))) |
45be8a1e | 379 | { |
a9d4f28a | 380 | Lisp_Object stderr_file; |
70949dac | 381 | stderr_file = XCAR (XCDR (buffer)); |
45be8a1e RS |
382 | |
383 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
384 | error_file = stderr_file; | |
385 | else | |
386 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
387 | } | |
388 | ||
70949dac | 389 | buffer = XCAR (buffer); |
39eaa782 | 390 | } |
044512ed | 391 | |
1ef14cb4 | 392 | /* If the buffer is (still) a list, it might be a (:file "file") spec. */ |
94fcd171 | 393 | if (CONSP (buffer) && EQ (XCAR (buffer), QCfile)) |
1ef14cb4 LMI |
394 | { |
395 | output_file = Fexpand_file_name (XCAR (XCDR (buffer)), | |
396 | BVAR (current_buffer, directory)); | |
397 | CHECK_STRING (output_file); | |
398 | buffer = Qnil; | |
399 | } | |
400 | ||
94fcd171 | 401 | if (! (NILP (buffer) || EQ (buffer, Qt) || INTEGERP (buffer))) |
e576cab4 | 402 | { |
39eaa782 RS |
403 | Lisp_Object spec_buffer; |
404 | spec_buffer = buffer; | |
50fe359b | 405 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
406 | /* Mention the buffer name for a better error message. */ |
407 | if (NILP (buffer)) | |
b7826503 PJ |
408 | CHECK_BUFFER (spec_buffer); |
409 | CHECK_BUFFER (buffer); | |
e576cab4 JB |
410 | } |
411 | } | |
80856e74 | 412 | |
58616e67 JB |
413 | /* Make sure that the child will be able to chdir to the current |
414 | buffer's current directory, or its unhandled equivalent. We | |
415 | can't just have the child check for an error when it does the | |
416 | chdir, since it's in a vfork. | |
417 | ||
418 | We have to GCPRO around this because Fexpand_file_name, | |
419 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
420 | might call a file name handling function. The argument list is | |
421 | protected by the caller, so all we really have to worry about is | |
422 | buffer. */ | |
423 | { | |
94fcd171 | 424 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
58616e67 | 425 | |
c365c355 | 426 | current_dir = encode_current_directory (); |
58616e67 | 427 | |
94fcd171 | 428 | GCPRO4 (buffer, current_dir, error_file, output_file); |
58616e67 | 429 | |
34b87689 KH |
430 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) |
431 | error_file = ENCODE_FILE (error_file); | |
1ef14cb4 LMI |
432 | if (STRINGP (output_file) && STRING_MULTIBYTE (output_file)) |
433 | output_file = ENCODE_FILE (output_file); | |
58616e67 JB |
434 | UNGCPRO; |
435 | } | |
436 | ||
d311d28c | 437 | display_p = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
80856e74 | 438 | |
94fcd171 PE |
439 | for (i = 0; i < CALLPROC_FDS; i++) |
440 | callproc_fd[i] = -1; | |
441 | #ifdef MSDOS | |
442 | synch_process_tempfile = make_number (0); | |
443 | #endif | |
444 | record_unwind_protect_ptr (call_process_kill, callproc_fd); | |
1ef14cb4 | 445 | |
80856e74 | 446 | /* Search for program; barf if not found. */ |
c52b0b34 | 447 | { |
94fcd171 | 448 | struct gcpro gcpro1, gcpro2, gcpro3; |
a773ed9a | 449 | int ok; |
c52b0b34 | 450 | |
94fcd171 | 451 | GCPRO3 (buffer, current_dir, error_file); |
518c40a2 PE |
452 | ok = openp (Vexec_path, args[0], Vexec_suffixes, &path, |
453 | make_number (X_OK), false); | |
c52b0b34 | 454 | UNGCPRO; |
a773ed9a | 455 | if (ok < 0) |
94fcd171 | 456 | report_file_error ("Searching for program", args[0]); |
c52b0b34 | 457 | } |
8ee8f447 RS |
458 | |
459 | /* If program file name starts with /: for quoting a magic name, | |
460 | discard that. */ | |
461 | if (SBYTES (path) > 2 && SREF (path, 0) == '/' | |
462 | && SREF (path, 1) == ':') | |
463 | path = Fsubstring (path, make_number (2), Qnil); | |
464 | ||
98c6f1e3 | 465 | new_argv = SAFE_ALLOCA ((nargs > 4 ? nargs - 2 : 2) * sizeof *new_argv); |
c364e618 | 466 | |
e7c3fb06 | 467 | { |
94fcd171 | 468 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
e7c3fb06 | 469 | |
94fcd171 | 470 | GCPRO4 (buffer, current_dir, path, error_file); |
e7c3fb06 EZ |
471 | if (nargs > 4) |
472 | { | |
473 | ptrdiff_t i; | |
474 | ||
475 | argument_coding.dst_multibyte = 0; | |
476 | for (i = 4; i < nargs; i++) | |
477 | { | |
478 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); | |
479 | if (CODING_REQUIRE_ENCODING (&argument_coding)) | |
480 | /* We must encode this argument. */ | |
481 | args[i] = encode_coding_string (&argument_coding, args[i], 1); | |
482 | } | |
483 | for (i = 4; i < nargs; i++) | |
94fbc901 | 484 | new_argv[i - 3] = SSDATA (args[i]); |
e7c3fb06 EZ |
485 | new_argv[i - 3] = 0; |
486 | } | |
487 | else | |
488 | new_argv[1] = 0; | |
489 | if (STRING_MULTIBYTE (path)) | |
490 | path = ENCODE_FILE (path); | |
94fbc901 | 491 | new_argv[0] = SSDATA (path); |
e7c3fb06 EZ |
492 | UNGCPRO; |
493 | } | |
80856e74 | 494 | |
94fcd171 | 495 | discard_output = INTEGERP (buffer) || (NILP (buffer) && NILP (output_file)); |
7e6c2178 | 496 | |
94fcd171 PE |
497 | #ifdef MSDOS |
498 | if (! discard_output && ! STRINGP (output_file)) | |
7e6c2178 | 499 | { |
94fcd171 PE |
500 | char const *tmpdir = egetenv ("TMPDIR"); |
501 | char const *outf = tmpdir ? tmpdir : ""; | |
502 | tempfile = alloca (strlen (outf) + 20); | |
503 | strcpy (tempfile, outf); | |
bf6b4923 | 504 | dostounix_filename (tempfile); |
888c9e86 EZ |
505 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') |
506 | strcat (tempfile, "/"); | |
bf6b4923 | 507 | strcat (tempfile, "emXXXXXX"); |
888c9e86 | 508 | mktemp (tempfile); |
94fcd171 PE |
509 | if (!*tempfile) |
510 | report_file_error ("Opening process output file", Qnil); | |
511 | output_file = build_string (tempfile); | |
512 | synch_process_tempfile = output_file; | |
513 | } | |
514 | #endif | |
515 | ||
516 | if (discard_output) | |
517 | { | |
518 | fd_output = emacs_open (NULL_DEVICE, O_WRONLY, 0); | |
519 | if (fd_output < 0) | |
520 | report_file_error ("Opening null device", Qnil); | |
521 | } | |
522 | else if (STRINGP (output_file)) | |
523 | { | |
524 | fd_output = emacs_open (SSDATA (output_file), | |
525 | O_WRONLY | O_CREAT | O_TRUNC | O_TEXT, | |
526 | default_output_mode); | |
527 | if (fd_output < 0) | |
a773ed9a PE |
528 | { |
529 | int open_errno = errno; | |
94fcd171 | 530 | output_file = DECODE_FILE (output_file); |
a773ed9a | 531 | report_file_errno ("Opening process output file", |
94fcd171 | 532 | output_file, open_errno); |
a773ed9a | 533 | } |
7e6c2178 | 534 | } |
80856e74 JB |
535 | else |
536 | { | |
60aeceb8 | 537 | int fd[2]; |
c7ddc792 | 538 | if (emacs_pipe (fd) != 0) |
94fcd171 PE |
539 | report_file_error ("Creating process pipe", Qnil); |
540 | callproc_fd[CALLPROC_PIPEREAD] = fd[0]; | |
541 | fd_output = fd[1]; | |
80856e74 | 542 | } |
94fcd171 | 543 | callproc_fd[CALLPROC_STDOUT] = fd_output; |
80856e74 | 544 | |
94fcd171 | 545 | fd_error = fd_output; |
80856e74 | 546 | |
94fcd171 PE |
547 | if (STRINGP (error_file) || (NILP (error_file) && !discard_output)) |
548 | { | |
549 | fd_error = emacs_open ((STRINGP (error_file) | |
550 | ? SSDATA (error_file) | |
551 | : NULL_DEVICE), | |
406af475 PE |
552 | O_WRONLY | O_CREAT | O_TRUNC | O_TEXT, |
553 | default_output_mode); | |
94fcd171 PE |
554 | if (fd_error < 0) |
555 | { | |
556 | int open_errno = errno; | |
557 | report_file_errno ("Cannot redirect stderr", | |
558 | (STRINGP (error_file) | |
559 | ? DECODE_FILE (error_file) | |
560 | : build_string (NULL_DEVICE)), | |
561 | open_errno); | |
562 | } | |
563 | callproc_fd[CALLPROC_STDERR] = fd_error; | |
564 | } | |
89e1ec1d | 565 | |
2610078a | 566 | #ifdef MSDOS /* MW, July 1993 */ |
94fcd171 PE |
567 | /* Note that on MSDOS `child_setup' actually returns the child process |
568 | exit status, not its PID, so assign it to status below. */ | |
5d1922cd | 569 | pid = child_setup (*filefd, fd_output, fd_error, new_argv, 0, current_dir); |
94fcd171 PE |
570 | |
571 | if (pid < 0) | |
572 | { | |
573 | child_errno = errno; | |
574 | unbind_to (count, Qnil); | |
575 | synchronize_system_messages_locale (); | |
576 | return | |
577 | code_convert_string_norecord (build_string (strerror (child_errno)), | |
578 | Vlocale_coding_system, 0); | |
579 | } | |
580 | status = pid; | |
581 | ||
582 | for (i = 0; i < CALLPROC_FDS; i++) | |
583 | if (0 <= callproc_fd[i]) | |
2610078a | 584 | { |
94fcd171 PE |
585 | emacs_close (callproc_fd[i]); |
586 | callproc_fd[i] = -1; | |
2610078a | 587 | } |
5d1922cd BT |
588 | emacs_close (*filefd); |
589 | *filefd = -1; | |
94fcd171 PE |
590 | |
591 | if (tempfile) | |
592 | { | |
593 | /* Since CRLF is converted to LF within `decode_coding', we | |
594 | can always open a file with binary mode. */ | |
595 | callproc_fd[CALLPROC_PIPEREAD] = emacs_open (tempfile, | |
596 | O_RDONLY | O_BINARY, 0); | |
597 | if (callproc_fd[CALLPROC_PIPEREAD] < 0) | |
598 | { | |
599 | int open_errno = errno; | |
600 | report_file_errno ("Cannot re-open temporary file", | |
601 | build_string (tempfile), open_errno); | |
602 | } | |
603 | } | |
604 | ||
644d3f0d | 605 | #endif /* MSDOS */ |
bb5f74ee | 606 | |
94fcd171 PE |
607 | /* Do the unwind-protect now, even though the pid is not known, so |
608 | that no storage allocation is done in the critical section. | |
609 | The actual PID will be filled in during the critical section. */ | |
610 | record_unwind_protect (call_process_cleanup, Fcurrent_buffer ()); | |
644d3f0d | 611 | |
94fcd171 | 612 | #ifndef MSDOS |
bb5f74ee | 613 | |
94fcd171 | 614 | block_input (); |
1e952f0a | 615 | block_child_signal (&oldset); |
bb5f74ee | 616 | |
bad95d8f | 617 | #ifdef WINDOWSNT |
5d1922cd | 618 | pid = child_setup (*filefd, fd_output, fd_error, new_argv, 0, current_dir); |
bad95d8f | 619 | #else /* not WINDOWSNT */ |
c0ad4ea5 | 620 | |
94fcd171 PE |
621 | /* vfork, and prevent local vars from being clobbered by the vfork. */ |
622 | { | |
623 | Lisp_Object volatile buffer_volatile = buffer; | |
624 | Lisp_Object volatile coding_systems_volatile = coding_systems; | |
625 | Lisp_Object volatile current_dir_volatile = current_dir; | |
626 | bool volatile display_p_volatile = display_p; | |
94fcd171 | 627 | int volatile fd_error_volatile = fd_error; |
5d1922cd | 628 | int *volatile filefd_volatile = filefd; |
94fcd171 | 629 | ptrdiff_t volatile count_volatile = count; |
94fcd171 PE |
630 | char **volatile new_argv_volatile = new_argv; |
631 | int volatile callproc_fd_volatile[CALLPROC_FDS]; | |
632 | for (i = 0; i < CALLPROC_FDS; i++) | |
633 | callproc_fd_volatile[i] = callproc_fd[i]; | |
634 | ||
635 | pid = vfork (); | |
636 | ||
637 | buffer = buffer_volatile; | |
638 | coding_systems = coding_systems_volatile; | |
639 | current_dir = current_dir_volatile; | |
640 | display_p = display_p_volatile; | |
94fcd171 PE |
641 | fd_error = fd_error_volatile; |
642 | filefd = filefd_volatile; | |
643 | count = count_volatile; | |
94fcd171 PE |
644 | new_argv = new_argv_volatile; |
645 | ||
646 | for (i = 0; i < CALLPROC_FDS; i++) | |
647 | callproc_fd[i] = callproc_fd_volatile[i]; | |
648 | fd_output = callproc_fd[CALLPROC_STDOUT]; | |
649 | } | |
bb5f74ee | 650 | |
94fcd171 PE |
651 | if (pid == 0) |
652 | { | |
1e952f0a | 653 | unblock_child_signal (&oldset); |
322aea6d | 654 | |
94fcd171 | 655 | setsid (); |
c0ad4ea5 | 656 | |
94fcd171 PE |
657 | /* Emacs ignores SIGPIPE, but the child should not. */ |
658 | signal (SIGPIPE, SIG_DFL); | |
507a173f AS |
659 | /* Likewise for SIGPROF. */ |
660 | #ifdef SIGPROF | |
661 | signal (SIGPROF, SIG_DFL); | |
662 | #endif | |
c0ad4ea5 | 663 | |
5d1922cd | 664 | child_setup (*filefd, fd_output, fd_error, new_argv, 0, current_dir); |
94fcd171 | 665 | } |
aba637ec | 666 | |
bad95d8f | 667 | #endif /* not WINDOWSNT */ |
cd5f8f60 | 668 | |
94fcd171 | 669 | child_errno = errno; |
bb5f74ee | 670 | |
94fcd171 | 671 | if (pid > 0) |
4a88129a PE |
672 | { |
673 | synch_process_pid = pid; | |
674 | ||
675 | if (INTEGERP (buffer)) | |
676 | { | |
5d1922cd BT |
677 | if (tempfile_ptr) |
678 | { | |
679 | record_deleted_pid (pid, *tempfile_ptr); | |
680 | *tempfile_ptr = Qnil; | |
681 | } | |
682 | else | |
683 | { | |
684 | record_deleted_pid (pid, Qnil); | |
685 | } | |
4a88129a PE |
686 | synch_process_pid = 0; |
687 | } | |
688 | } | |
bb5f74ee | 689 | |
1e952f0a | 690 | unblock_child_signal (&oldset); |
94fcd171 | 691 | unblock_input (); |
bb5f74ee | 692 | |
80856e74 | 693 | if (pid < 0) |
a773ed9a | 694 | report_file_errno ("Doing vfork", Qnil, child_errno); |
80856e74 | 695 | |
94fcd171 PE |
696 | /* Close our file descriptors, except for callproc_fd[CALLPROC_PIPEREAD] |
697 | since we will use that to read input from. */ | |
698 | for (i = 0; i < CALLPROC_FDS; i++) | |
699 | if (i != CALLPROC_PIPEREAD && 0 <= callproc_fd[i]) | |
700 | { | |
701 | emacs_close (callproc_fd[i]); | |
702 | callproc_fd[i] = -1; | |
703 | } | |
5d1922cd BT |
704 | emacs_close (*filefd); |
705 | *filefd = -1; | |
94fcd171 | 706 | |
bf6b4923 EZ |
707 | #endif /* not MSDOS */ |
708 | ||
d50d3dc8 | 709 | if (INTEGERP (buffer)) |
644d3f0d | 710 | return unbind_to (count, Qnil); |
80856e74 | 711 | |
d50d3dc8 | 712 | if (BUFFERP (buffer)) |
80856e74 JB |
713 | Fset_buffer (buffer); |
714 | ||
94fcd171 PE |
715 | fd0 = callproc_fd[CALLPROC_PIPEREAD]; |
716 | ||
717 | if (0 <= fd0) | |
09494912 RS |
718 | { |
719 | Lisp_Object val, *args2; | |
720 | ||
721 | val = Qnil; | |
722 | if (!NILP (Vcoding_system_for_read)) | |
723 | val = Vcoding_system_for_read; | |
724 | else | |
725 | { | |
726 | if (EQ (coding_systems, Qt)) | |
727 | { | |
f66c7cf8 | 728 | ptrdiff_t i; |
09494912 | 729 | |
0065d054 | 730 | SAFE_NALLOCA (args2, 1, nargs + 1); |
09494912 RS |
731 | args2[0] = Qcall_process; |
732 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
733 | coding_systems | |
734 | = Ffind_operation_coding_system (nargs + 1, args2); | |
735 | } | |
736 | if (CONSP (coding_systems)) | |
70949dac | 737 | val = XCAR (coding_systems); |
09494912 | 738 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 739 | val = XCAR (Vdefault_process_coding_system); |
09494912 RS |
740 | else |
741 | val = Qnil; | |
742 | } | |
91183bfd | 743 | Fcheck_coding_system (val); |
09494912 RS |
744 | /* In unibyte mode, character code conversion should not take |
745 | place but EOL conversion should. So, setup raw-text or one | |
746 | of the subsidiary according to the information just setup. */ | |
4b4deea2 | 747 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
09494912 | 748 | && !NILP (val)) |
91183bfd KH |
749 | val = raw_text_coding_system (val); |
750 | setup_coding_system (val, &process_coding); | |
659afede KH |
751 | process_coding.dst_multibyte |
752 | = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); | |
94fcd171 | 753 | process_coding.src_multibyte = 0; |
09494912 RS |
754 | } |
755 | ||
80856e74 JB |
756 | immediate_quit = 1; |
757 | QUIT; | |
758 | ||
94fcd171 | 759 | if (0 <= fd0) |
19ed11ba | 760 | { |
60aeceb8 PE |
761 | enum { CALLPROC_BUFFER_SIZE_MIN = 16 * 1024 }; |
762 | enum { CALLPROC_BUFFER_SIZE_MAX = 4 * CALLPROC_BUFFER_SIZE_MIN }; | |
763 | char buf[CALLPROC_BUFFER_SIZE_MAX]; | |
764 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; | |
2f221583 | 765 | int nread; |
19ed11ba AS |
766 | EMACS_INT total_read = 0; |
767 | int carryover = 0; | |
2f221583 | 768 | bool display_on_the_fly = display_p; |
94fcd171 | 769 | struct coding_system saved_coding = process_coding; |
19ed11ba | 770 | |
19ed11ba AS |
771 | while (1) |
772 | { | |
773 | /* Repeatedly read until we've filled as much as possible | |
774 | of the buffer size we have. But don't read | |
775 | less than 1024--save that for the next bufferful. */ | |
776 | nread = carryover; | |
777 | while (nread < bufsize - 1024) | |
778 | { | |
60aeceb8 | 779 | int this_read = emacs_read (fd0, buf + nread, |
19ed11ba | 780 | bufsize - nread); |
60558b19 | 781 | |
19ed11ba AS |
782 | if (this_read < 0) |
783 | goto give_up; | |
60558b19 | 784 | |
19ed11ba AS |
785 | if (this_read == 0) |
786 | { | |
787 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
788 | break; | |
789 | } | |
60558b19 | 790 | |
19ed11ba AS |
791 | nread += this_read; |
792 | total_read += this_read; | |
60558b19 | 793 | |
19ed11ba AS |
794 | if (display_on_the_fly) |
795 | break; | |
796 | } | |
60558b19 | 797 | |
19ed11ba AS |
798 | /* Now NREAD is the total amount of data in the buffer. */ |
799 | immediate_quit = 0; | |
177c0ea7 | 800 | |
c4e6b585 SM |
801 | if (!nread) |
802 | ; | |
803 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters)) | |
804 | && ! CODING_MAY_REQUIRE_DECODING (&process_coding)) | |
94fcd171 PE |
805 | insert_1_both (buf, nread, nread, 0, 1, 0); |
806 | else | |
807 | { /* We have to decode the input. */ | |
808 | Lisp_Object curbuf; | |
809 | ptrdiff_t count1 = SPECPDL_INDEX (); | |
810 | ||
811 | XSETBUFFER (curbuf, current_buffer); | |
c4e6b585 | 812 | /* FIXME: Call signal_after_change! */ |
d57f4dde | 813 | prepare_to_modify_buffer (PT, PT, NULL); |
94fcd171 PE |
814 | /* We cannot allow after-change-functions be run |
815 | during decoding, because that might modify the | |
816 | buffer, while we rely on process_coding.produced to | |
817 | faithfully reflect inserted text until we | |
818 | TEMP_SET_PT_BOTH below. */ | |
819 | specbind (Qinhibit_modification_hooks, Qt); | |
820 | decode_coding_c_string (&process_coding, | |
821 | (unsigned char *) buf, nread, curbuf); | |
822 | unbind_to (count1, Qnil); | |
823 | if (display_on_the_fly | |
824 | && CODING_REQUIRE_DETECTION (&saved_coding) | |
825 | && ! CODING_REQUIRE_DETECTION (&process_coding)) | |
826 | { | |
827 | /* We have detected some coding system, but the | |
828 | detection may have been via insufficient data. | |
829 | So give up displaying on the fly. */ | |
830 | if (process_coding.produced > 0) | |
831 | del_range_2 (process_coding.dst_pos, | |
832 | process_coding.dst_pos_byte, | |
833 | (process_coding.dst_pos | |
834 | + process_coding.produced_char), | |
835 | (process_coding.dst_pos_byte | |
836 | + process_coding.produced), | |
837 | 0); | |
838 | display_on_the_fly = 0; | |
839 | process_coding = saved_coding; | |
840 | carryover = nread; | |
841 | /* Make the above condition always fail in the future. */ | |
842 | saved_coding.common_flags | |
843 | &= ~CODING_REQUIRE_DETECTION_MASK; | |
844 | continue; | |
19ed11ba | 845 | } |
94fcd171 PE |
846 | |
847 | TEMP_SET_PT_BOTH (PT + process_coding.produced_char, | |
848 | PT_BYTE + process_coding.produced); | |
849 | carryover = process_coding.carryover_bytes; | |
850 | if (carryover > 0) | |
851 | memcpy (buf, process_coding.carryover, | |
852 | process_coding.carryover_bytes); | |
19ed11ba | 853 | } |
c5bfa12b | 854 | |
19ed11ba AS |
855 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
856 | break; | |
6e3bfbb2 | 857 | |
19ed11ba AS |
858 | /* Make the buffer bigger as we continue to read more data, |
859 | but not past CALLPROC_BUFFER_SIZE_MAX. */ | |
860 | if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) | |
861 | if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) | |
862 | bufsize = CALLPROC_BUFFER_SIZE_MAX; | |
6e3bfbb2 | 863 | |
19ed11ba AS |
864 | if (display_p) |
865 | { | |
19ed11ba AS |
866 | redisplay_preserve_echo_area (1); |
867 | /* This variable might have been set to 0 for code | |
94fcd171 | 868 | detection. In that case, set it back to 1 because |
19ed11ba AS |
869 | we should have already detected a coding system. */ |
870 | display_on_the_fly = 1; | |
871 | } | |
872 | immediate_quit = 1; | |
873 | QUIT; | |
874 | } | |
875 | give_up: ; | |
876 | ||
877 | Vlast_coding_system_used = CODING_ID_NAME (process_coding.id); | |
878 | /* If the caller required, let the buffer inherit the | |
879 | coding-system used to decode the process output. */ | |
880 | if (inherit_process_coding_system) | |
881 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
882 | make_number (total_read)); | |
883 | } | |
3b440bb5 | 884 | |
77defa9a | 885 | #ifndef MSDOS |
80856e74 | 886 | /* Wait for it to terminate, unless it already has. */ |
94fcd171 | 887 | wait_for_termination (pid, &status, fd0 < 0); |
77defa9a | 888 | #endif |
80856e74 JB |
889 | |
890 | immediate_quit = 0; | |
891 | ||
37d54121 RS |
892 | /* Don't kill any children that the subprocess may have left behind |
893 | when exiting. */ | |
bb5f74ee | 894 | synch_process_pid = 0; |
37d54121 | 895 | |
3c59b4c9 | 896 | SAFE_FREE (); |
80856e74 JB |
897 | unbind_to (count, Qnil); |
898 | ||
bb5f74ee | 899 | if (WIFSIGNALED (status)) |
6b61353c | 900 | { |
42ca4633 | 901 | const char *signame; |
6b61353c KH |
902 | |
903 | synchronize_system_messages_locale (); | |
bb5f74ee | 904 | signame = strsignal (WTERMSIG (status)); |
6b61353c KH |
905 | |
906 | if (signame == 0) | |
19ed11ba | 907 | signame = "unknown"; |
6b61353c | 908 | |
bb5f74ee PE |
909 | return code_convert_string_norecord (build_string (signame), |
910 | Vlocale_coding_system, 0); | |
6b61353c KH |
911 | } |
912 | ||
bb5f74ee PE |
913 | eassert (WIFEXITED (status)); |
914 | return make_number (WEXITSTATUS (status)); | |
80856e74 | 915 | } |
80856e74 | 916 | \f |
bafe80ce PE |
917 | /* Create a temporary file suitable for storing the input data of |
918 | call-process-region. NARGS and ARGS are the same as for | |
94fcd171 PE |
919 | call-process-region. Store into *FILENAME_STRING_PTR a Lisp string |
920 | naming the file, and return a file descriptor for reading. | |
921 | Unwind-protect the file, so that the file descriptor will be closed | |
922 | and the file removed when the caller unwinds the specpdl stack. */ | |
fdb82f93 | 923 | |
5d1922cd | 924 | static void |
94fcd171 | 925 | create_temp_file (ptrdiff_t nargs, Lisp_Object *args, |
5d1922cd | 926 | Lisp_Object *filename_string_ptr, int *fdp) |
80856e74 | 927 | { |
94fcd171 | 928 | int fd; |
39323a7e KH |
929 | struct gcpro gcpro1; |
930 | Lisp_Object filename_string; | |
bafe80ce | 931 | Lisp_Object val, start, end; |
98c6f1e3 | 932 | Lisp_Object tmpdir; |
7e6c2178 | 933 | |
f92d51d8 CY |
934 | if (STRINGP (Vtemporary_file_directory)) |
935 | tmpdir = Vtemporary_file_directory; | |
7e6c2178 RS |
936 | else |
937 | { | |
83be8524 | 938 | char *outf; |
f92d51d8 | 939 | #ifndef DOS_NT |
83be8524 PE |
940 | outf = getenv ("TMPDIR"); |
941 | tmpdir = build_string (outf ? outf : "/tmp/"); | |
f92d51d8 | 942 | #else /* DOS_NT */ |
f92d51d8 CY |
943 | if ((outf = egetenv ("TMPDIR")) |
944 | || (outf = egetenv ("TMP")) | |
945 | || (outf = egetenv ("TEMP"))) | |
946 | tmpdir = build_string (outf); | |
947 | else | |
948 | tmpdir = Ffile_name_as_directory (build_string ("c:/temp")); | |
0774fcf8 | 949 | #endif |
f92d51d8 | 950 | } |
7e6c2178 | 951 | |
3c59b4c9 | 952 | { |
98c6f1e3 | 953 | Lisp_Object pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir); |
74ba1583 | 954 | char *tempfile; |
94fcd171 | 955 | ptrdiff_t count; |
74ba1583 EZ |
956 | |
957 | #ifdef WINDOWSNT | |
958 | /* Cannot use the result of Fexpand_file_name, because it | |
959 | downcases the XXXXXX part of the pattern, and mktemp then | |
960 | doesn't recognize it. */ | |
961 | if (!NILP (Vw32_downcase_file_names)) | |
962 | { | |
963 | Lisp_Object dirname = Ffile_name_directory (pattern); | |
964 | ||
965 | if (NILP (dirname)) | |
966 | pattern = Vtemp_file_name_pattern; | |
967 | else | |
968 | pattern = concat2 (dirname, Vtemp_file_name_pattern); | |
969 | } | |
970 | #endif | |
971 | ||
bafe80ce PE |
972 | filename_string = Fcopy_sequence (ENCODE_FILE (pattern)); |
973 | GCPRO1 (filename_string); | |
974 | tempfile = SSDATA (filename_string); | |
09494912 | 975 | |
94fcd171 PE |
976 | fd = mkostemp (tempfile, O_CLOEXEC); |
977 | if (fd < 0) | |
978 | report_file_error ("Failed to open temporary file using pattern", | |
979 | pattern); | |
5d1922cd BT |
980 | *fdp = fd; |
981 | *filename_string_ptr = filename_string; | |
982 | record_unwind_protect (delete_temp_file_ptr, filename_string_ptr); | |
983 | record_unwind_protect_ptr (close_file_ptr_unwind, fdp); | |
3c59b4c9 PE |
984 | } |
985 | ||
80856e74 JB |
986 | start = args[0]; |
987 | end = args[1]; | |
32d08644 | 988 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
989 | if (!NILP (Vcoding_system_for_write)) |
990 | val = Vcoding_system_for_write; | |
4b4deea2 | 991 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
fcaf8878 | 992 | val = Qraw_text; |
32d08644 | 993 | else |
beacaab3 | 994 | { |
bafe80ce PE |
995 | Lisp_Object coding_systems; |
996 | Lisp_Object *args2; | |
3c59b4c9 | 997 | USE_SAFE_ALLOCA; |
0065d054 | 998 | SAFE_NALLOCA (args2, 1, nargs + 1); |
91489411 | 999 | args2[0] = Qcall_process_region; |
bafe80ce | 1000 | memcpy (args2 + 1, args, nargs * sizeof *args); |
91489411 | 1001 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 1002 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
3c59b4c9 | 1003 | SAFE_FREE (); |
beacaab3 | 1004 | } |
fcaf8878 | 1005 | val = complement_process_encoding_system (val); |
32d08644 | 1006 | |
168afdaa | 1007 | { |
d311d28c | 1008 | ptrdiff_t count1 = SPECPDL_INDEX (); |
168afdaa RS |
1009 | |
1010 | specbind (intern ("coding-system-for-write"), val); | |
bb951f0e KR |
1011 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
1012 | happen to get a ".Z" suffix. */ | |
1013 | specbind (intern ("file-name-handler-alist"), Qnil); | |
94fcd171 | 1014 | write_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil, fd); |
168afdaa RS |
1015 | |
1016 | unbind_to (count1, Qnil); | |
1017 | } | |
91489411 | 1018 | |
94fcd171 PE |
1019 | if (lseek (fd, 0, SEEK_SET) < 0) |
1020 | report_file_error ("Setting file position", filename_string); | |
1021 | ||
177c0ea7 | 1022 | /* Note that Fcall_process takes care of binding |
91489411 | 1023 | coding-system-for-read. */ |
093650fe | 1024 | |
94fcd171 | 1025 | UNGCPRO; |
bafe80ce PE |
1026 | } |
1027 | ||
1028 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
1029 | 3, MANY, 0, | |
1030 | doc: /* Send text from START to END to a synchronous process running PROGRAM. | |
1031 | The remaining arguments are optional. | |
1032 | Delete the text if fourth arg DELETE is non-nil. | |
1033 | ||
1034 | Insert output in BUFFER before point; t means current buffer; nil for | |
1035 | BUFFER means discard it; 0 means discard and don't wait; and `(:file | |
1036 | FILE)', where FILE is a file name string, means that it should be | |
1037 | written to that file (if the file already exists it is overwritten). | |
1038 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, | |
1039 | REAL-BUFFER says what to do with standard output, as above, | |
1040 | while STDERR-FILE says what to do with standard error in the child. | |
1041 | STDERR-FILE may be nil (discard standard error output), | |
1042 | t (mix it with ordinary output), or a file name string. | |
1043 | ||
1044 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
1045 | Remaining args are passed to PROGRAM at startup as command args. | |
1046 | ||
1047 | If BUFFER is 0, `call-process-region' returns immediately with value nil. | |
1048 | Otherwise it waits for PROGRAM to terminate | |
1049 | and returns a numeric exit status or a signal description string. | |
1050 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. | |
1051 | ||
1052 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) | |
1053 | (ptrdiff_t nargs, Lisp_Object *args) | |
1054 | { | |
4a88129a | 1055 | struct gcpro gcpro1; |
94fcd171 | 1056 | Lisp_Object infile, val; |
bafe80ce PE |
1057 | ptrdiff_t count = SPECPDL_INDEX (); |
1058 | Lisp_Object start = args[0]; | |
1059 | Lisp_Object end = args[1]; | |
1060 | bool empty_input; | |
94fcd171 | 1061 | int fd; |
bafe80ce PE |
1062 | |
1063 | if (STRINGP (start)) | |
1064 | empty_input = SCHARS (start) == 0; | |
1065 | else if (NILP (start)) | |
1066 | empty_input = BEG == Z; | |
1067 | else | |
1068 | { | |
1069 | validate_region (&args[0], &args[1]); | |
1070 | start = args[0]; | |
1071 | end = args[1]; | |
1072 | empty_input = XINT (start) == XINT (end); | |
1073 | } | |
1074 | ||
94fcd171 | 1075 | if (!empty_input) |
5d1922cd | 1076 | create_temp_file (nargs, args, &infile, &fd); |
94fcd171 PE |
1077 | else |
1078 | { | |
1079 | infile = Qnil; | |
1080 | fd = emacs_open (NULL_DEVICE, O_RDONLY, 0); | |
1081 | if (fd < 0) | |
1082 | report_file_error ("Opening null device", Qnil); | |
5d1922cd | 1083 | record_unwind_protect_ptr (close_file_ptr_unwind, &fd); |
94fcd171 PE |
1084 | } |
1085 | ||
4a88129a | 1086 | GCPRO1 (infile); |
80856e74 | 1087 | |
edf496dd | 1088 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
1089 | Fdelete_region (start, end); |
1090 | ||
edf496dd KH |
1091 | if (nargs > 3) |
1092 | { | |
1093 | args += 2; | |
1094 | nargs -= 2; | |
1095 | } | |
1096 | else | |
1097 | { | |
1098 | args[0] = args[2]; | |
1099 | nargs = 2; | |
1100 | } | |
50a30cce | 1101 | args[1] = infile; |
80856e74 | 1102 | |
5d1922cd | 1103 | val = call_process (nargs, args, &fd, &infile); |
94fcd171 | 1104 | RETURN_UNGCPRO (unbind_to (count, val)); |
80856e74 JB |
1105 | } |
1106 | \f | |
361358ea | 1107 | #ifndef WINDOWSNT |
971de7fb | 1108 | static int relocate_fd (int fd, int minfd); |
361358ea | 1109 | #endif |
dfcf069d | 1110 | |
5990851d KL |
1111 | static char ** |
1112 | add_env (char **env, char **new_env, char *string) | |
1113 | { | |
1114 | char **ep; | |
2f221583 | 1115 | bool ok = 1; |
5990851d KL |
1116 | if (string == NULL) |
1117 | return new_env; | |
1118 | ||
1119 | /* See if this string duplicates any string already in the env. | |
1120 | If so, don't put it in. | |
1121 | When an env var has multiple definitions, | |
1122 | we keep the definition that comes first in process-environment. */ | |
1123 | for (ep = env; ok && ep != new_env; ep++) | |
1124 | { | |
1125 | char *p = *ep, *q = string; | |
1126 | while (ok) | |
19ed11ba AS |
1127 | { |
1128 | if (*q != *p) | |
1129 | break; | |
1130 | if (*q == 0) | |
1131 | /* The string is a lone variable name; keep it for now, we | |
1132 | will remove it later. It is a placeholder for a | |
1133 | variable that is not to be included in the environment. */ | |
1134 | break; | |
1135 | if (*q == '=') | |
1136 | ok = 0; | |
1137 | p++, q++; | |
1138 | } | |
5990851d KL |
1139 | } |
1140 | if (ok) | |
1141 | *new_env++ = string; | |
1142 | return new_env; | |
1143 | } | |
1144 | ||
80856e74 JB |
1145 | /* This is the last thing run in a newly forked inferior |
1146 | either synchronous or asynchronous. | |
1147 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
1148 | Initialize inferior's priority, pgrp, connected dir and environment. | |
1149 | then exec another program based on new_argv. | |
1150 | ||
2f221583 | 1151 | If SET_PGRP, put the subprocess into a separate process group. |
e576cab4 JB |
1152 | |
1153 | CURRENT_DIR is an elisp string giving the path of the current | |
1154 | directory the subprocess should have. Since we can't really signal | |
1155 | a decent error from within the child, this should be verified as an | |
1156 | executable directory by the parent. */ | |
80856e74 | 1157 | |
dfcf069d | 1158 | int |
2f221583 PE |
1159 | child_setup (int in, int out, int err, char **new_argv, bool set_pgrp, |
1160 | Lisp_Object current_dir) | |
80856e74 | 1161 | { |
e576cab4 | 1162 | char **env; |
7fcf7f05 | 1163 | char *pwd_var; |
bad95d8f RS |
1164 | #ifdef WINDOWSNT |
1165 | int cpid; | |
4252a4bd | 1166 | HANDLE handles[3]; |
afacaa1b JB |
1167 | #else |
1168 | int exec_errno; | |
e576cab4 | 1169 | |
d311d28c | 1170 | pid_t pid = getpid (); |
afacaa1b | 1171 | #endif /* WINDOWSNT */ |
80856e74 | 1172 | |
80856e74 JB |
1173 | /* Note that use of alloca is always safe here. It's obvious for systems |
1174 | that do not have true vfork or that have true (stack) alloca. | |
caa01fe0 GM |
1175 | If using vfork and C_ALLOCA (when Emacs used to include |
1176 | src/alloca.c) it is safe because that changes the superior's | |
1177 | static variables as if the superior had done alloca and will be | |
1178 | cleaned up in the usual way. */ | |
e576cab4 | 1179 | { |
c365c355 PE |
1180 | char *temp; |
1181 | ptrdiff_t i; | |
77d78be1 | 1182 | |
d5db4077 | 1183 | i = SBYTES (current_dir); |
16425c4a EZ |
1184 | #ifdef MSDOS |
1185 | /* MSDOS must have all environment variables malloc'ed, because | |
1186 | low-level libc functions that launch subsidiary processes rely | |
1187 | on that. */ | |
c365c355 | 1188 | pwd_var = xmalloc (i + 5); |
16425c4a | 1189 | #else |
c365c355 | 1190 | pwd_var = alloca (i + 5); |
16425c4a | 1191 | #endif |
7fcf7f05 | 1192 | temp = pwd_var + 4; |
72af86bd | 1193 | memcpy (pwd_var, "PWD=", 4); |
c365c355 | 1194 | strcpy (temp, SSDATA (current_dir)); |
e576cab4 | 1195 | |
c17c4250 | 1196 | #ifndef DOS_NT |
e576cab4 JB |
1197 | /* We can't signal an Elisp error here; we're in a vfork. Since |
1198 | the callers check the current directory before forking, this | |
1199 | should only return an error if the directory's permissions | |
1200 | are changed between the check and this chdir, but we should | |
1201 | at least check. */ | |
1202 | if (chdir (temp) < 0) | |
4ebbdd67 | 1203 | _exit (EXIT_CANCELED); |
f8d23104 | 1204 | #else /* DOS_NT */ |
c17c4250 EZ |
1205 | /* Get past the drive letter, so that d:/ is left alone. */ |
1206 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
1207 | { | |
1208 | temp += 2; | |
1209 | i -= 2; | |
1210 | } | |
f8d23104 | 1211 | #endif /* DOS_NT */ |
c17c4250 | 1212 | |
7fcf7f05 | 1213 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 1214 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 1215 | temp[--i] = 0; |
e576cab4 | 1216 | } |
80856e74 | 1217 | |
5990851d | 1218 | /* Set `env' to a vector of the strings in the environment. */ |
80856e74 JB |
1219 | { |
1220 | register Lisp_Object tem; | |
1221 | register char **new_env; | |
5990851d | 1222 | char **p, **q; |
80856e74 | 1223 | register int new_length; |
d2bb6598 | 1224 | Lisp_Object display = Qnil; |
361358ea | 1225 | |
80856e74 | 1226 | new_length = 0; |
f105f403 | 1227 | |
80856e74 | 1228 | for (tem = Vprocess_environment; |
19ed11ba AS |
1229 | CONSP (tem) && STRINGP (XCAR (tem)); |
1230 | tem = XCDR (tem)) | |
d2bb6598 | 1231 | { |
42a5b22f | 1232 | if (strncmp (SSDATA (XCAR (tem)), "DISPLAY", 7) == 0 |
d2bb6598 SM |
1233 | && (SDATA (XCAR (tem)) [7] == '\0' |
1234 | || SDATA (XCAR (tem)) [7] == '=')) | |
1235 | /* DISPLAY is specified in process-environment. */ | |
1236 | display = Qt; | |
1237 | new_length++; | |
1238 | } | |
de87fb59 | 1239 | |
d2bb6598 SM |
1240 | /* If not provided yet, use the frame's DISPLAY. */ |
1241 | if (NILP (display)) | |
1242 | { | |
1243 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); | |
1244 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) | |
1245 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1246 | tmp = Fgetenv_internal (build_string ("DISPLAY"), | |
1247 | Vinitial_environment); | |
1248 | if (STRINGP (tmp)) | |
1249 | { | |
1250 | display = tmp; | |
1251 | new_length++; | |
1252 | } | |
1253 | } | |
80856e74 | 1254 | |
7fcf7f05 | 1255 | /* new_length + 2 to include PWD and terminating 0. */ |
38182d90 | 1256 | env = new_env = alloca ((new_length + 2) * sizeof *env); |
7fcf7f05 RS |
1257 | /* If we have a PWD envvar, pass one down, |
1258 | but with corrected value. */ | |
a13f8f50 | 1259 | if (egetenv ("PWD")) |
7fcf7f05 | 1260 | *new_env++ = pwd_var; |
361358ea | 1261 | |
6b8e474c | 1262 | if (STRINGP (display)) |
de87fb59 | 1263 | { |
38182d90 | 1264 | char *vdata = alloca (sizeof "DISPLAY=" + SBYTES (display)); |
de87fb59 | 1265 | strcpy (vdata, "DISPLAY="); |
42a5b22f | 1266 | strcat (vdata, SSDATA (display)); |
de87fb59 DN |
1267 | new_env = add_env (env, new_env, vdata); |
1268 | } | |
80856e74 | 1269 | |
5990851d | 1270 | /* Overrides. */ |
80856e74 | 1271 | for (tem = Vprocess_environment; |
70949dac KR |
1272 | CONSP (tem) && STRINGP (XCAR (tem)); |
1273 | tem = XCDR (tem)) | |
42a5b22f | 1274 | new_env = add_env (env, new_env, SSDATA (XCAR (tem))); |
d2bb6598 | 1275 | |
5990851d KL |
1276 | *new_env = 0; |
1277 | ||
1278 | /* Remove variable names without values. */ | |
1279 | p = q = env; | |
1280 | while (*p != 0) | |
cd9565ba | 1281 | { |
19ed11ba AS |
1282 | while (*q != 0 && strchr (*q, '=') == NULL) |
1283 | q++; | |
1284 | *p = *q++; | |
1285 | if (*p != 0) | |
1286 | p++; | |
cd9565ba | 1287 | } |
80856e74 | 1288 | } |
de87fb59 | 1289 | |
361358ea | 1290 | |
bad95d8f RS |
1291 | #ifdef WINDOWSNT |
1292 | prepare_standard_handles (in, out, err, handles); | |
d5db4077 | 1293 | set_process_dir (SDATA (current_dir)); |
d3d14b40 | 1294 | /* Spawn the child. (See w32proc.c:sys_spawnve). */ |
67802943 DN |
1295 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); |
1296 | reset_standard_handles (in, out, err, handles); | |
1297 | if (cpid == -1) | |
1298 | /* An error occurred while trying to spawn the process. */ | |
1299 | report_file_error ("Spawning child process", Qnil); | |
1300 | return cpid; | |
1301 | ||
bad95d8f | 1302 | #else /* not WINDOWSNT */ |
426b37ae JB |
1303 | /* Make sure that in, out, and err are not actually already in |
1304 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1305 | started with its standard in, out, or error closed, as might |
426b37ae | 1306 | happen under X. */ |
f29f9e4a RS |
1307 | { |
1308 | int oin = in, oout = out; | |
1309 | ||
1310 | /* We have to avoid relocating the same descriptor twice! */ | |
1311 | ||
1312 | in = relocate_fd (in, 3); | |
1313 | ||
1314 | if (out == oin) | |
1315 | out = in; | |
1316 | else | |
3e9367e7 | 1317 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1318 | |
1319 | if (err == oin) | |
1320 | err = in; | |
1321 | else if (err == oout) | |
1322 | err = out; | |
1323 | else | |
3e9367e7 | 1324 | err = relocate_fd (err, 3); |
f29f9e4a | 1325 | } |
426b37ae | 1326 | |
c17c4250 | 1327 | #ifndef MSDOS |
4700b5a5 PE |
1328 | /* Redirect file descriptors and clear the close-on-exec flag on the |
1329 | redirected ones. IN, OUT, and ERR are close-on-exec so they | |
1330 | need not be closed explicitly. */ | |
80856e74 JB |
1331 | dup2 (in, 0); |
1332 | dup2 (out, 1); | |
1333 | dup2 (err, 2); | |
067428c1 | 1334 | |
dd0333b6 | 1335 | setpgid (0, 0); |
12e610e8 | 1336 | tcsetpgrp (0, pid); |
a7ebc409 | 1337 | |
21e54a94 | 1338 | execve (new_argv[0], new_argv, env); |
ee010797 | 1339 | exec_errno = errno; |
80856e74 | 1340 | |
ee010797 PE |
1341 | /* Avoid deadlock if the child's perror writes to a full pipe; the |
1342 | pipe's reader is the parent, but with vfork the parent can't | |
1343 | run until the child exits. Truncate the diagnostic instead. */ | |
1344 | fcntl (STDERR_FILENO, F_SETFL, O_NONBLOCK); | |
4ebbdd67 | 1345 | |
ee010797 PE |
1346 | errno = exec_errno; |
1347 | emacs_perror (new_argv[0]); | |
1348 | _exit (exec_errno == ENOENT ? EXIT_ENOENT : EXIT_CANNOT_INVOKE); | |
67802943 DN |
1349 | |
1350 | #else /* MSDOS */ | |
1351 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
1352 | xfree (pwd_var); | |
1353 | if (pid == -1) | |
1354 | /* An error occurred while trying to run the subprocess. */ | |
1355 | report_file_error ("Spawning child process", Qnil); | |
1356 | return pid; | |
1357 | #endif /* MSDOS */ | |
ae76d9e1 | 1358 | #endif /* not WINDOWSNT */ |
80856e74 JB |
1359 | } |
1360 | ||
361358ea | 1361 | #ifndef WINDOWSNT |
a3833dfe | 1362 | /* Move the file descriptor FD so that its number is not less than MINFD. |
4700b5a5 PE |
1363 | If the file descriptor is moved at all, the original is closed on MSDOS, |
1364 | but not elsewhere as the caller will close it anyway. */ | |
dfcf069d | 1365 | static int |
971de7fb | 1366 | relocate_fd (int fd, int minfd) |
426b37ae | 1367 | { |
a3833dfe | 1368 | if (fd >= minfd) |
426b37ae JB |
1369 | return fd; |
1370 | else | |
1371 | { | |
067428c1 | 1372 | int new = fcntl (fd, F_DUPFD_CLOEXEC, minfd); |
426b37ae JB |
1373 | if (new == -1) |
1374 | { | |
4ebbdd67 PE |
1375 | emacs_perror ("while setting up child"); |
1376 | _exit (EXIT_CANCELED); | |
426b37ae | 1377 | } |
4700b5a5 | 1378 | #ifdef MSDOS |
68c45bf0 | 1379 | emacs_close (fd); |
4700b5a5 | 1380 | #endif |
426b37ae JB |
1381 | return new; |
1382 | } | |
1383 | } | |
361358ea | 1384 | #endif /* not WINDOWSNT */ |
426b37ae | 1385 | |
2f221583 | 1386 | static bool |
989f33ba PE |
1387 | getenv_internal_1 (const char *var, ptrdiff_t varlen, char **value, |
1388 | ptrdiff_t *valuelen, Lisp_Object env) | |
012c6fcb | 1389 | { |
db699fc6 | 1390 | for (; CONSP (env); env = XCDR (env)) |
012c6fcb | 1391 | { |
db699fc6 | 1392 | Lisp_Object entry = XCAR (env); |
d50d3dc8 | 1393 | if (STRINGP (entry) |
db699fc6 | 1394 | && SBYTES (entry) >= varlen |
bad95d8f RS |
1395 | #ifdef WINDOWSNT |
1396 | /* NT environment variables are case insensitive. */ | |
d5db4077 | 1397 | && ! strnicmp (SDATA (entry), var, varlen) |
bad95d8f | 1398 | #else /* not WINDOWSNT */ |
72af86bd | 1399 | && ! memcmp (SDATA (entry), var, varlen) |
bad95d8f | 1400 | #endif /* not WINDOWSNT */ |
a9971c6d | 1401 | ) |
012c6fcb | 1402 | { |
db699fc6 SM |
1403 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') |
1404 | { | |
51b59d79 | 1405 | *value = SSDATA (entry) + (varlen + 1); |
db699fc6 SM |
1406 | *valuelen = SBYTES (entry) - (varlen + 1); |
1407 | return 1; | |
1408 | } | |
1409 | else if (SBYTES (entry) == varlen) | |
1410 | { | |
1411 | /* Lone variable names in Vprocess_environment mean that | |
1412 | variable should be removed from the environment. */ | |
1413 | *value = NULL; | |
1414 | return 1; | |
1415 | } | |
1416 | } | |
1417 | } | |
1418 | return 0; | |
1419 | } | |
1420 | ||
2f221583 | 1421 | static bool |
989f33ba PE |
1422 | getenv_internal (const char *var, ptrdiff_t varlen, char **value, |
1423 | ptrdiff_t *valuelen, Lisp_Object frame) | |
012c6fcb | 1424 | { |
d2bb6598 SM |
1425 | /* Try to find VAR in Vprocess_environment first. */ |
1426 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1427 | Vprocess_environment)) | |
1428 | return *value ? 1 : 0; | |
f105f403 | 1429 | |
d2bb6598 | 1430 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
de87fb59 | 1431 | if (strcmp (var, "DISPLAY") == 0) |
d2bb6598 SM |
1432 | { |
1433 | Lisp_Object display | |
1434 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); | |
1435 | if (STRINGP (display)) | |
1436 | { | |
51b59d79 | 1437 | *value = SSDATA (display); |
de87fb59 | 1438 | *valuelen = SBYTES (display); |
012c6fcb JA |
1439 | return 1; |
1440 | } | |
d2bb6598 SM |
1441 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
1442 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1443 | Vinitial_environment)) | |
1444 | return *value ? 1 : 0; | |
012c6fcb JA |
1445 | } |
1446 | ||
1447 | return 0; | |
1448 | } | |
1449 | ||
f105f403 | 1450 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
5990851d KL |
1451 | doc: /* Get the value of environment variable VARIABLE. |
1452 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
1453 | the environment. Otherwise, value is a string. | |
f105f403 | 1454 | |
acf20901 | 1455 | This function searches `process-environment' for VARIABLE. |
5990851d | 1456 | |
db699fc6 | 1457 | If optional parameter ENV is a list, then search this list instead of |
acf20901 JB |
1458 | `process-environment', and return t when encountering a negative entry |
1459 | \(an entry for a variable with no value). */) | |
5842a27b | 1460 | (Lisp_Object variable, Lisp_Object env) |
012c6fcb JA |
1461 | { |
1462 | char *value; | |
989f33ba | 1463 | ptrdiff_t valuelen; |
012c6fcb | 1464 | |
5990851d | 1465 | CHECK_STRING (variable); |
db699fc6 SM |
1466 | if (CONSP (env)) |
1467 | { | |
42a5b22f | 1468 | if (getenv_internal_1 (SSDATA (variable), SBYTES (variable), |
db699fc6 SM |
1469 | &value, &valuelen, env)) |
1470 | return value ? make_string (value, valuelen) : Qt; | |
1471 | else | |
1472 | return Qnil; | |
1473 | } | |
42a5b22f | 1474 | else if (getenv_internal (SSDATA (variable), SBYTES (variable), |
d2bb6598 | 1475 | &value, &valuelen, env)) |
012c6fcb JA |
1476 | return make_string (value, valuelen); |
1477 | else | |
1478 | return Qnil; | |
1479 | } | |
1480 | ||
5990851d KL |
1481 | /* A version of getenv that consults the Lisp environment lists, |
1482 | easily callable from C. */ | |
012c6fcb | 1483 | char * |
a8fe7202 | 1484 | egetenv (const char *var) |
012c6fcb JA |
1485 | { |
1486 | char *value; | |
25c7e41f | 1487 | ptrdiff_t valuelen; |
012c6fcb | 1488 | |
f105f403 | 1489 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
012c6fcb JA |
1490 | return value; |
1491 | else | |
1492 | return 0; | |
1493 | } | |
1494 | ||
80856e74 | 1495 | \f |
8de15d69 | 1496 | /* This is run before init_cmdargs. */ |
177c0ea7 | 1497 | |
dfcf069d | 1498 | void |
971de7fb | 1499 | init_callproc_1 (void) |
8de15d69 | 1500 | { |
d01ba2f1 GM |
1501 | #ifdef HAVE_NS |
1502 | const char *etc_dir = ns_etc_directory (); | |
cbb31951 | 1503 | const char *path_exec = ns_exec_path (); |
d01ba2f1 | 1504 | #endif |
35a2f4b8 | 1505 | |
76151e2c | 1506 | Vdata_directory = decode_env_path ("EMACSDATA", |
d01ba2f1 | 1507 | #ifdef HAVE_NS |
76151e2c | 1508 | etc_dir ? etc_dir : |
d01ba2f1 | 1509 | #endif |
17e0445b | 1510 | PATH_DATA, 0); |
76151e2c EZ |
1511 | Vdata_directory = Ffile_name_as_directory (Fcar (Vdata_directory)); |
1512 | ||
1513 | Vdoc_directory = decode_env_path ("EMACSDOC", | |
d01ba2f1 | 1514 | #ifdef HAVE_NS |
76151e2c | 1515 | etc_dir ? etc_dir : |
d01ba2f1 | 1516 | #endif |
17e0445b | 1517 | PATH_DOC, 0); |
76151e2c | 1518 | Vdoc_directory = Ffile_name_as_directory (Fcar (Vdoc_directory)); |
9453ea7b | 1519 | |
e576cab4 | 1520 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1521 | PATH_EXEC path from epaths.h. */ |
cbb31951 GM |
1522 | Vexec_path = decode_env_path ("EMACSPATH", |
1523 | #ifdef HAVE_NS | |
1524 | path_exec ? path_exec : | |
1525 | #endif | |
17e0445b | 1526 | PATH_EXEC, 0); |
80856e74 | 1527 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
cbb31951 | 1528 | /* FIXME? For ns, path_exec should go at the front? */ |
17e0445b | 1529 | Vexec_path = nconc2 (decode_env_path ("PATH", "", 0), Vexec_path); |
8de15d69 RS |
1530 | } |
1531 | ||
e17f7533 | 1532 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1533 | |
dfcf069d | 1534 | void |
971de7fb | 1535 | init_callproc (void) |
8de15d69 RS |
1536 | { |
1537 | char *data_dir = egetenv ("EMACSDATA"); | |
177c0ea7 | 1538 | |
8de15d69 RS |
1539 | register char * sh; |
1540 | Lisp_Object tempdir; | |
d01ba2f1 GM |
1541 | #ifdef HAVE_NS |
1542 | if (data_dir == 0) | |
1543 | { | |
1544 | const char *etc_dir = ns_etc_directory (); | |
1545 | if (etc_dir) | |
1546 | { | |
1547 | data_dir = alloca (strlen (etc_dir) + 1); | |
1548 | strcpy (data_dir, etc_dir); | |
1549 | } | |
1550 | } | |
1551 | #endif | |
8de15d69 | 1552 | |
9cc4fad5 | 1553 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1554 | { |
05630743 RS |
1555 | /* Add to the path the lib-src subdir of the installation dir. */ |
1556 | Lisp_Object tem; | |
1557 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1558 | Vinstallation_directory); | |
76151e2c | 1559 | #ifndef MSDOS |
1a6640ec | 1560 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc | 1561 | if (NILP (Fmember (tem, Vexec_path))) |
70ec1377 | 1562 | { |
cbb31951 GM |
1563 | #ifdef HAVE_NS |
1564 | const char *path_exec = ns_exec_path (); | |
1565 | #endif | |
1566 | Vexec_path = decode_env_path ("EMACSPATH", | |
1567 | #ifdef HAVE_NS | |
1568 | path_exec ? path_exec : | |
1569 | #endif | |
17e0445b | 1570 | PATH_EXEC, 0); |
70ec1377 | 1571 | Vexec_path = Fcons (tem, Vexec_path); |
17e0445b | 1572 | Vexec_path = nconc2 (decode_env_path ("PATH", "", 0), Vexec_path); |
70ec1377 | 1573 | } |
177c0ea7 | 1574 | |
0fa248bc | 1575 | Vexec_directory = Ffile_name_as_directory (tem); |
76151e2c | 1576 | #endif /* not MSDOS */ |
8de15d69 | 1577 | |
e17f7533 RS |
1578 | /* Maybe use ../etc as well as ../lib-src. */ |
1579 | if (data_dir == 0) | |
1580 | { | |
1581 | tem = Fexpand_file_name (build_string ("etc"), | |
1582 | Vinstallation_directory); | |
1583 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1584 | } |
1585 | } | |
7e933683 RS |
1586 | |
1587 | /* Look for the files that should be in etc. We don't use | |
1588 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1589 | near the executable, and they are never in the build |
7e933683 RS |
1590 | directory when that's different from the source directory. |
1591 | ||
1592 | Instead, if these files are not in the nominal place, we try the | |
1593 | source directory. */ | |
1594 | if (data_dir == 0) | |
1595 | { | |
70ec1377 | 1596 | Lisp_Object tem, tem1, srcdir; |
624780f0 GM |
1597 | Lisp_Object lispdir = Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH, 0)); |
1598 | ||
1599 | srcdir = Fexpand_file_name (build_string ("../src/"), lispdir); | |
7e933683 | 1600 | |
00156f95 | 1601 | tem = Fexpand_file_name (build_string ("NEWS"), Vdata_directory); |
7e933683 | 1602 | tem1 = Ffile_exists_p (tem); |
70ec1377 | 1603 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
7e933683 | 1604 | { |
70ec1377 | 1605 | Lisp_Object newdir; |
624780f0 | 1606 | newdir = Fexpand_file_name (build_string ("../etc/"), lispdir); |
00156f95 | 1607 | tem = Fexpand_file_name (build_string ("NEWS"), newdir); |
7e933683 RS |
1608 | tem1 = Ffile_exists_p (tem); |
1609 | if (!NILP (tem1)) | |
1610 | Vdata_directory = newdir; | |
1611 | } | |
1612 | } | |
80856e74 | 1613 | |
d883eb62 RS |
1614 | #ifndef CANNOT_DUMP |
1615 | if (initialized) | |
1616 | #endif | |
1617 | { | |
1618 | tempdir = Fdirectory_file_name (Vexec_directory); | |
73dcdb9f PE |
1619 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
1620 | dir_warning ("arch-dependent data dir", Vexec_directory); | |
d883eb62 | 1621 | } |
80856e74 | 1622 | |
e576cab4 | 1623 | tempdir = Fdirectory_file_name (Vdata_directory); |
73dcdb9f PE |
1624 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
1625 | dir_warning ("arch-independent data dir", Vdata_directory); | |
e576cab4 | 1626 | |
83be8524 | 1627 | sh = getenv ("SHELL"); |
80856e74 | 1628 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
8abd035b | 1629 | |
40b49d4b JB |
1630 | #ifdef DOS_NT |
1631 | Vshared_game_score_directory = Qnil; | |
1632 | #else | |
d0065ff1 | 1633 | Vshared_game_score_directory = build_unibyte_string (PATH_GAME); |
73dcdb9f | 1634 | if (NILP (Ffile_accessible_directory_p (Vshared_game_score_directory))) |
63789758 | 1635 | Vshared_game_score_directory = Qnil; |
40b49d4b | 1636 | #endif |
9fefd2ba JB |
1637 | } |
1638 | ||
dfcf069d | 1639 | void |
971de7fb | 1640 | set_initial_environment (void) |
9fefd2ba | 1641 | { |
738db178 DN |
1642 | char **envp; |
1643 | for (envp = environ; *envp; envp++) | |
1644 | Vprocess_environment = Fcons (build_string (*envp), | |
1645 | Vprocess_environment); | |
1646 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent | |
1647 | to use `delete' and friends on process-environment. */ | |
1648 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); | |
80856e74 JB |
1649 | } |
1650 | ||
dfcf069d | 1651 | void |
971de7fb | 1652 | syms_of_callproc (void) |
80856e74 | 1653 | { |
fe6aa7a1 BT |
1654 | #include "callproc.x" |
1655 | ||
f92d51d8 CY |
1656 | #ifndef DOS_NT |
1657 | Vtemp_file_name_pattern = build_string ("emacsXXXXXX"); | |
bf6b4923 | 1658 | #else /* DOS_NT */ |
f92d51d8 | 1659 | Vtemp_file_name_pattern = build_string ("emXXXXXX"); |
f92d51d8 CY |
1660 | #endif |
1661 | staticpro (&Vtemp_file_name_pattern); | |
1662 | ||
94fcd171 PE |
1663 | synch_process_tempfile = make_number (0); |
1664 | staticpro (&synch_process_tempfile); | |
94fcd171 | 1665 | |
29208e82 | 1666 | DEFVAR_LISP ("shell-file-name", Vshell_file_name, |
fb7ada5f | 1667 | doc: /* File name to load inferior shells from. |
b20b29be EZ |
1668 | Initialized from the SHELL environment variable, or to a system-dependent |
1669 | default if SHELL is not set. */); | |
80856e74 | 1670 | |
29208e82 | 1671 | DEFVAR_LISP ("exec-path", Vexec_path, |
fb7ada5f | 1672 | doc: /* List of directories to search programs to run in subprocesses. |
fdadeb49 JC |
1673 | Each element is a string (directory name) or nil (try default directory). |
1674 | ||
1675 | By default the last element of this list is `exec-directory'. The | |
1676 | last element is not always used, for example in shell completion | |
1677 | (`shell-dynamic-complete-command'). */); | |
80856e74 | 1678 | |
29208e82 | 1679 | DEFVAR_LISP ("exec-suffixes", Vexec_suffixes, |
fb7ada5f | 1680 | doc: /* List of suffixes to try to find executable file names. |
fdb82f93 | 1681 | Each element is a string. */); |
33d5af99 | 1682 | Vexec_suffixes = Qnil; |
b81a1b72 | 1683 | |
29208e82 | 1684 | DEFVAR_LISP ("exec-directory", Vexec_directory, |
fdb82f93 PJ |
1685 | doc: /* Directory for executables for Emacs to invoke. |
1686 | More generally, this includes any architecture-dependent files | |
1687 | that are built and installed from the Emacs distribution. */); | |
e576cab4 | 1688 | |
29208e82 | 1689 | DEFVAR_LISP ("data-directory", Vdata_directory, |
fdb82f93 PJ |
1690 | doc: /* Directory of machine-independent files that come with GNU Emacs. |
1691 | These are files intended for Emacs to use while it runs. */); | |
80856e74 | 1692 | |
29208e82 | 1693 | DEFVAR_LISP ("doc-directory", Vdoc_directory, |
fdb82f93 | 1694 | doc: /* Directory containing the DOC file that comes with GNU Emacs. |
ebf24b59 | 1695 | This is usually the same as `data-directory'. */); |
35a2f4b8 | 1696 | |
29208e82 | 1697 | DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory, |
fdb82f93 PJ |
1698 | doc: /* For internal use by the build procedure only. |
1699 | This is the name of the directory in which the build procedure installed | |
ebf24b59 | 1700 | Emacs's info files; the default value for `Info-default-directory-list' |
fdb82f93 | 1701 | includes this. */); |
ed61592a JB |
1702 | Vconfigure_info_directory = build_string (PATH_INFO); |
1703 | ||
29208e82 | 1704 | DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory, |
b065672a CW |
1705 | doc: /* Directory of score files for games which come with GNU Emacs. |
1706 | If this variable is nil, then Emacs is unable to use a shared directory. */); | |
40b49d4b JB |
1707 | #ifdef DOS_NT |
1708 | Vshared_game_score_directory = Qnil; | |
1709 | #else | |
63789758 | 1710 | Vshared_game_score_directory = build_string (PATH_GAME); |
40b49d4b | 1711 | #endif |
b065672a | 1712 | |
29208e82 | 1713 | DEFVAR_LISP ("initial-environment", Vinitial_environment, |
6b8e474c SM |
1714 | doc: /* List of environment variables inherited from the parent process. |
1715 | Each element should be a string of the form ENVVARNAME=VALUE. | |
1716 | The elements must normally be decoded (using `locale-coding-system') for use. */); | |
1717 | Vinitial_environment = Qnil; | |
1718 | ||
29208e82 | 1719 | DEFVAR_LISP ("process-environment", Vprocess_environment, |
5990851d | 1720 | doc: /* List of overridden environment variables for subprocesses to inherit. |
fdb82f93 | 1721 | Each element should be a string of the form ENVVARNAME=VALUE. |
5990851d | 1722 | |
a13f8f50 KL |
1723 | Entries in this list take precedence to those in the frame-local |
1724 | environments. Therefore, let-binding `process-environment' is an easy | |
1725 | way to temporarily change the value of an environment variable, | |
1726 | irrespective of where it comes from. To use `process-environment' to | |
1727 | remove an environment variable, include only its name in the list, | |
1728 | without "=VALUE". | |
5990851d KL |
1729 | |
1730 | This variable is set to nil when Emacs starts. | |
1731 | ||
fdb82f93 PJ |
1732 | If multiple entries define the same variable, the first one always |
1733 | takes precedence. | |
5990851d | 1734 | |
776a24a1 | 1735 | Non-ASCII characters are encoded according to the initial value of |
5990851d KL |
1736 | `locale-coding-system', i.e. the elements must normally be decoded for |
1737 | use. | |
1738 | ||
776a24a1 | 1739 | See `setenv' and `getenv'. */); |
86f5ca04 | 1740 | Vprocess_environment = Qnil; |
80856e74 | 1741 | } |