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 | /* If a string, the name of a temp file that has not been removed. */ |
94fcd171 | 86 | static Lisp_Object synch_process_tempfile; |
94fcd171 PE |
87 | |
88 | /* Indexes of file descriptors that need closing on call_process_kill. */ | |
89 | enum | |
90 | { | |
91 | /* The subsidiary process's stdout and stderr. stdin is handled | |
92 | separately, in either Fcall_process_region or create_temp_file. */ | |
93 | CALLPROC_STDOUT, CALLPROC_STDERR, | |
94 | ||
95 | /* How to read from a pipe (or substitute) from the subsidiary process. */ | |
96 | CALLPROC_PIPEREAD, | |
97 | ||
98 | /* A bound on the number of file descriptors. */ | |
99 | CALLPROC_FDS | |
100 | }; | |
101 | ||
e1ad689c | 102 | static Lisp_Object call_process (ptrdiff_t, Lisp_Object *, int *, Lisp_Object *); |
bb5f74ee | 103 | \f |
c365c355 PE |
104 | /* Return the current buffer's working directory, or the home |
105 | directory if it's unreachable, as a string suitable for a system call. | |
106 | Signal an error if the result would not be an accessible directory. */ | |
107 | ||
108 | Lisp_Object | |
109 | encode_current_directory (void) | |
110 | { | |
111 | Lisp_Object dir; | |
112 | struct gcpro gcpro1; | |
113 | ||
114 | dir = BVAR (current_buffer, directory); | |
115 | GCPRO1 (dir); | |
116 | ||
117 | dir = Funhandled_file_name_directory (dir); | |
118 | ||
119 | /* If the file name handler says that dir is unreachable, use | |
120 | a sensible default. */ | |
121 | if (NILP (dir)) | |
122 | dir = build_string ("~"); | |
123 | ||
124 | dir = expand_and_dir_to_file (dir, Qnil); | |
125 | ||
126 | if (STRING_MULTIBYTE (dir)) | |
127 | dir = ENCODE_FILE (dir); | |
128 | if (! file_accessible_directory_p (SSDATA (dir))) | |
129 | report_file_error ("Setting current directory", | |
130 | BVAR (current_buffer, directory)); | |
131 | ||
3200038e | 132 | return dir; |
c365c355 PE |
133 | } |
134 | ||
35fb8050 PE |
135 | /* If P is reapable, record it as a deleted process and kill it. |
136 | Do this in a critical section. Unless PID is wedged it will be | |
137 | reaped on receipt of the first SIGCHLD after the critical section. */ | |
138 | ||
139 | void | |
94fcd171 | 140 | record_kill_process (struct Lisp_Process *p, Lisp_Object tempfile) |
35fb8050 | 141 | { |
bf6b4923 | 142 | #ifndef MSDOS |
1e952f0a PE |
143 | sigset_t oldset; |
144 | block_child_signal (&oldset); | |
35fb8050 PE |
145 | |
146 | if (p->alive) | |
147 | { | |
94fcd171 | 148 | record_deleted_pid (p->pid, tempfile); |
35fb8050 | 149 | p->alive = 0; |
d983a10b | 150 | kill (- p->pid, SIGKILL); |
35fb8050 PE |
151 | } |
152 | ||
1e952f0a | 153 | unblock_child_signal (&oldset); |
bf6b4923 | 154 | #endif /* !MSDOS */ |
35fb8050 PE |
155 | } |
156 | ||
94fcd171 PE |
157 | /* Clean up files, file descriptors and processes created by Fcall_process. */ |
158 | ||
159 | static void | |
0cf99437 | 160 | delete_temp_file (Lisp_Object name) |
94fcd171 | 161 | { |
e1ad689c BT |
162 | if (! NILP (name)) |
163 | unlink (SSDATA (name)); | |
94fcd171 | 164 | } |
37d54121 | 165 | |
0cf99437 BT |
166 | static void |
167 | delete_temp_file_ptr (Lisp_Object *name_ptr) | |
168 | { | |
169 | if (name_ptr) | |
170 | delete_temp_file (*name_ptr); | |
171 | } | |
172 | ||
27e498e6 | 173 | static void |
94fcd171 | 174 | call_process_kill (void *ptr) |
d177f194 | 175 | { |
94fcd171 PE |
176 | int *callproc_fd = ptr; |
177 | int i; | |
178 | for (i = 0; i < CALLPROC_FDS; i++) | |
179 | if (0 <= callproc_fd[i]) | |
180 | emacs_close (callproc_fd[i]); | |
bb5f74ee | 181 | |
bb5f74ee PE |
182 | if (synch_process_pid) |
183 | { | |
35fb8050 PE |
184 | struct Lisp_Process proc; |
185 | proc.alive = 1; | |
186 | proc.pid = synch_process_pid; | |
94fcd171 PE |
187 | record_kill_process (&proc, synch_process_tempfile); |
188 | synch_process_pid = 0; | |
bb5f74ee | 189 | } |
94fcd171 | 190 | else if (STRINGP (synch_process_tempfile)) |
0cf99437 | 191 | delete_temp_file (synch_process_tempfile); |
d177f194 JB |
192 | } |
193 | ||
94fcd171 PE |
194 | /* Clean up when exiting Fcall_process: restore the buffer, and |
195 | kill the subsidiary process group if the process still exists. */ | |
bb5f74ee | 196 | |
27e498e6 | 197 | static void |
94fcd171 | 198 | call_process_cleanup (Lisp_Object buffer) |
80856e74 | 199 | { |
bb5f74ee | 200 | Fset_buffer (buffer); |
d177f194 | 201 | |
bf6b4923 | 202 | #ifndef MSDOS |
bb5f74ee | 203 | if (synch_process_pid) |
d177f194 | 204 | { |
d983a10b | 205 | kill (-synch_process_pid, SIGINT); |
d177f194 JB |
206 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); |
207 | immediate_quit = 1; | |
208 | QUIT; | |
bb5f74ee PE |
209 | wait_for_termination (synch_process_pid, 0, 1); |
210 | synch_process_pid = 0; | |
d177f194 | 211 | immediate_quit = 0; |
d177f194 JB |
212 | message1 ("Waiting for process to die...done"); |
213 | } | |
bf6b4923 | 214 | #endif /* !MSDOS */ |
80856e74 JB |
215 | } |
216 | ||
406af475 PE |
217 | #ifdef DOS_NT |
218 | static mode_t const default_output_mode = S_IREAD | S_IWRITE; | |
219 | #else | |
220 | static mode_t const default_output_mode = 0666; | |
221 | #endif | |
222 | ||
a7ca3326 | 223 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, |
fdb82f93 PJ |
224 | doc: /* Call PROGRAM synchronously in separate process. |
225 | The remaining arguments are optional. | |
226 | The program's input comes from file INFILE (nil means `/dev/null'). | |
38cd43eb | 227 | Insert output in DESTINATION before point; t means current buffer; nil for DESTINATION |
1ef14cb4 | 228 | means discard it; 0 means discard and don't wait; and `(:file FILE)', where |
1b9f60cc GM |
229 | FILE is a file name string, means that it should be written to that file |
230 | \(if the file already exists it is overwritten). | |
38cd43eb | 231 | DESTINATION can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
fdb82f93 PJ |
232 | REAL-BUFFER says what to do with standard output, as above, |
233 | while STDERR-FILE says what to do with standard error in the child. | |
234 | STDERR-FILE may be nil (discard standard error output), | |
235 | t (mix it with ordinary output), or a file name string. | |
236 | ||
237 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
238 | Remaining arguments are strings passed as command arguments to PROGRAM. | |
239 | ||
a4feb144 RS |
240 | If executable PROGRAM can't be found as an executable, `call-process' |
241 | signals a Lisp error. `call-process' reports errors in execution of | |
242 | the program only through its return and output. | |
243 | ||
38cd43eb | 244 | If DESTINATION is 0, `call-process' returns immediately with value nil. |
fdb82f93 PJ |
245 | Otherwise it waits for PROGRAM to terminate |
246 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
247 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
248 | ||
38cd43eb | 249 | usage: (call-process PROGRAM &optional INFILE DESTINATION DISPLAY &rest ARGS) */) |
f66c7cf8 | 250 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 251 | { |
94fcd171 PE |
252 | Lisp_Object infile, encoded_infile; |
253 | int filefd; | |
254 | struct gcpro gcpro1; | |
3200038e | 255 | dynwind_begin (); |
94fcd171 PE |
256 | |
257 | if (nargs >= 2 && ! NILP (args[1])) | |
258 | { | |
259 | infile = Fexpand_file_name (args[1], BVAR (current_buffer, directory)); | |
260 | CHECK_STRING (infile); | |
261 | } | |
262 | else | |
263 | infile = build_string (NULL_DEVICE); | |
264 | ||
265 | GCPRO1 (infile); | |
266 | encoded_infile = STRING_MULTIBYTE (infile) ? ENCODE_FILE (infile) : infile; | |
267 | ||
268 | filefd = emacs_open (SSDATA (encoded_infile), O_RDONLY, 0); | |
269 | if (filefd < 0) | |
270 | report_file_error ("Opening process input file", infile); | |
e1ad689c | 271 | record_unwind_protect_ptr (close_file_ptr_unwind, &filefd); |
94fcd171 | 272 | UNGCPRO; |
3200038e BT |
273 | Lisp_Object tem0 = call_process (nargs, args, &filefd, NULL); |
274 | dynwind_end (); | |
275 | return tem0; | |
94fcd171 PE |
276 | } |
277 | ||
278 | /* Like Fcall_process (NARGS, ARGS), except use FILEFD as the input file. | |
4a88129a PE |
279 | |
280 | If TEMPFILE_INDEX is nonnegative, it is the specpdl index of an | |
281 | unwinder that is intended to remove the input temporary file; in | |
282 | this case NARGS must be at least 2 and ARGS[1] is the file's name. | |
283 | ||
94fcd171 PE |
284 | At entry, the specpdl stack top entry must be close_file_unwind (FILEFD). */ |
285 | ||
286 | static Lisp_Object | |
e1ad689c | 287 | call_process (ptrdiff_t nargs, Lisp_Object *args, int *filefd, Lisp_Object *tempfile_ptr) |
94fcd171 PE |
288 | { |
289 | Lisp_Object buffer, current_dir, path; | |
2f221583 | 290 | bool display_p; |
94fcd171 PE |
291 | int fd0; |
292 | int callproc_fd[CALLPROC_FDS]; | |
bb5f74ee | 293 | int status; |
94fcd171 | 294 | ptrdiff_t i; |
d311d28c | 295 | USE_SAFE_ALLOCA; |
2d607244 | 296 | |
60aeceb8 | 297 | char **new_argv; |
39eaa782 RS |
298 | /* File to use for stderr in the child. |
299 | t means use same as standard output. */ | |
300 | Lisp_Object error_file; | |
1ef14cb4 | 301 | Lisp_Object output_file = Qnil; |
7e6c2178 | 302 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
94fcd171 | 303 | char *tempfile = NULL; |
d311d28c PE |
304 | int pid; |
305 | #else | |
1e952f0a | 306 | sigset_t oldset; |
d311d28c | 307 | pid_t pid; |
80856e74 | 308 | #endif |
bb5f74ee | 309 | int child_errno; |
94fcd171 | 310 | int fd_output, fd_error; |
32d08644 KH |
311 | struct coding_system process_coding; /* coding-system of process output */ |
312 | struct coding_system argument_coding; /* coding-system of arguments */ | |
09494912 RS |
313 | /* Set to the return value of Ffind_operation_coding_system. */ |
314 | Lisp_Object coding_systems; | |
94fcd171 PE |
315 | bool discard_output; |
316 | ||
3bf4baab BT |
317 | dynwind_begin (); |
318 | ||
94fcd171 PE |
319 | if (synch_process_pid) |
320 | error ("call-process invoked recursively"); | |
09494912 RS |
321 | |
322 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ | |
323 | coding_systems = Qt; | |
32d08644 | 324 | |
b7826503 | 325 | CHECK_STRING (args[0]); |
80856e74 | 326 | |
39eaa782 RS |
327 | error_file = Qt; |
328 | ||
7e6c2178 RS |
329 | #ifndef subprocesses |
330 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
177c0ea7 | 331 | if (nargs >= 3 |
09ffb8b5 | 332 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
333 | error ("Operating system cannot handle asynchronous subprocesses"); |
334 | #endif /* subprocesses */ | |
335 | ||
09494912 | 336 | /* Decide the coding-system for giving arguments. */ |
32d08644 KH |
337 | { |
338 | Lisp_Object val, *args2; | |
32d08644 KH |
339 | |
340 | /* If arguments are supplied, we may have to encode them. */ | |
341 | if (nargs >= 5) | |
342 | { | |
2f221583 | 343 | bool must_encode = 0; |
6e50da0a | 344 | Lisp_Object coding_attrs; |
30d57b8e | 345 | |
e7c1c20e | 346 | for (i = 4; i < nargs; i++) |
b7826503 | 347 | CHECK_STRING (args[i]); |
e7c1c20e | 348 | |
a2286b5c | 349 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
350 | if (STRING_MULTIBYTE (args[i])) |
351 | must_encode = 1; | |
352 | ||
beacaab3 KH |
353 | if (!NILP (Vcoding_system_for_write)) |
354 | val = Vcoding_system_for_write; | |
30d57b8e | 355 | else if (! must_encode) |
fcaf8878 | 356 | val = Qraw_text; |
beacaab3 | 357 | else |
32d08644 | 358 | { |
0065d054 | 359 | SAFE_NALLOCA (args2, 1, nargs + 1); |
32d08644 KH |
360 | args2[0] = Qcall_process; |
361 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 362 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 363 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
32d08644 | 364 | } |
fcaf8878 | 365 | val = complement_process_encoding_system (val); |
32d08644 | 366 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); |
6e50da0a KH |
367 | coding_attrs = CODING_ID_ATTRS (argument_coding.id); |
368 | if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs))) | |
369 | { | |
370 | /* We should not use an ASCII incompatible coding system. */ | |
371 | val = raw_text_coding_system (val); | |
372 | setup_coding_system (val, &argument_coding); | |
373 | } | |
32d08644 | 374 | } |
32d08644 KH |
375 | } |
376 | ||
94fcd171 PE |
377 | if (nargs < 3) |
378 | buffer = Qnil; | |
80856e74 | 379 | else |
e576cab4 | 380 | { |
39eaa782 RS |
381 | buffer = args[2]; |
382 | ||
1ef14cb4 LMI |
383 | /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT |
384 | FILE-FOR-STDERR), unless the first element is :file, in which case see | |
385 | the next paragraph. */ | |
94fcd171 | 386 | if (CONSP (buffer) && !EQ (XCAR (buffer), QCfile)) |
39eaa782 | 387 | { |
70949dac | 388 | if (CONSP (XCDR (buffer))) |
45be8a1e | 389 | { |
a9d4f28a | 390 | Lisp_Object stderr_file; |
70949dac | 391 | stderr_file = XCAR (XCDR (buffer)); |
45be8a1e RS |
392 | |
393 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
394 | error_file = stderr_file; | |
395 | else | |
396 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
397 | } | |
398 | ||
70949dac | 399 | buffer = XCAR (buffer); |
39eaa782 | 400 | } |
044512ed | 401 | |
1ef14cb4 | 402 | /* If the buffer is (still) a list, it might be a (:file "file") spec. */ |
94fcd171 | 403 | if (CONSP (buffer) && EQ (XCAR (buffer), QCfile)) |
1ef14cb4 LMI |
404 | { |
405 | output_file = Fexpand_file_name (XCAR (XCDR (buffer)), | |
406 | BVAR (current_buffer, directory)); | |
407 | CHECK_STRING (output_file); | |
408 | buffer = Qnil; | |
409 | } | |
410 | ||
94fcd171 | 411 | if (! (NILP (buffer) || EQ (buffer, Qt) || INTEGERP (buffer))) |
e576cab4 | 412 | { |
39eaa782 RS |
413 | Lisp_Object spec_buffer; |
414 | spec_buffer = buffer; | |
50fe359b | 415 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
416 | /* Mention the buffer name for a better error message. */ |
417 | if (NILP (buffer)) | |
b7826503 PJ |
418 | CHECK_BUFFER (spec_buffer); |
419 | CHECK_BUFFER (buffer); | |
e576cab4 JB |
420 | } |
421 | } | |
80856e74 | 422 | |
58616e67 JB |
423 | /* Make sure that the child will be able to chdir to the current |
424 | buffer's current directory, or its unhandled equivalent. We | |
425 | can't just have the child check for an error when it does the | |
426 | chdir, since it's in a vfork. | |
427 | ||
428 | We have to GCPRO around this because Fexpand_file_name, | |
429 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
430 | might call a file name handling function. The argument list is | |
431 | protected by the caller, so all we really have to worry about is | |
432 | buffer. */ | |
433 | { | |
94fcd171 | 434 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
58616e67 | 435 | |
c365c355 | 436 | current_dir = encode_current_directory (); |
58616e67 | 437 | |
94fcd171 | 438 | GCPRO4 (buffer, current_dir, error_file, output_file); |
58616e67 | 439 | |
34b87689 KH |
440 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) |
441 | error_file = ENCODE_FILE (error_file); | |
1ef14cb4 LMI |
442 | if (STRINGP (output_file) && STRING_MULTIBYTE (output_file)) |
443 | output_file = ENCODE_FILE (output_file); | |
58616e67 JB |
444 | UNGCPRO; |
445 | } | |
446 | ||
d311d28c | 447 | display_p = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
80856e74 | 448 | |
94fcd171 PE |
449 | for (i = 0; i < CALLPROC_FDS; i++) |
450 | callproc_fd[i] = -1; | |
451 | #ifdef MSDOS | |
452 | synch_process_tempfile = make_number (0); | |
453 | #endif | |
454 | record_unwind_protect_ptr (call_process_kill, callproc_fd); | |
1ef14cb4 | 455 | |
80856e74 | 456 | /* Search for program; barf if not found. */ |
c52b0b34 | 457 | { |
94fcd171 | 458 | struct gcpro gcpro1, gcpro2, gcpro3; |
a773ed9a | 459 | int ok; |
c52b0b34 | 460 | |
94fcd171 | 461 | GCPRO3 (buffer, current_dir, error_file); |
518c40a2 PE |
462 | ok = openp (Vexec_path, args[0], Vexec_suffixes, &path, |
463 | make_number (X_OK), false); | |
c52b0b34 | 464 | UNGCPRO; |
a773ed9a | 465 | if (ok < 0) |
94fcd171 | 466 | report_file_error ("Searching for program", args[0]); |
c52b0b34 | 467 | } |
8ee8f447 RS |
468 | |
469 | /* If program file name starts with /: for quoting a magic name, | |
470 | discard that. */ | |
471 | if (SBYTES (path) > 2 && SREF (path, 0) == '/' | |
472 | && SREF (path, 1) == ':') | |
473 | path = Fsubstring (path, make_number (2), Qnil); | |
474 | ||
98c6f1e3 | 475 | new_argv = SAFE_ALLOCA ((nargs > 4 ? nargs - 2 : 2) * sizeof *new_argv); |
c364e618 | 476 | |
e7c3fb06 | 477 | { |
94fcd171 | 478 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
e7c3fb06 | 479 | |
94fcd171 | 480 | GCPRO4 (buffer, current_dir, path, error_file); |
e7c3fb06 EZ |
481 | if (nargs > 4) |
482 | { | |
483 | ptrdiff_t i; | |
484 | ||
485 | argument_coding.dst_multibyte = 0; | |
486 | for (i = 4; i < nargs; i++) | |
487 | { | |
488 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); | |
489 | if (CODING_REQUIRE_ENCODING (&argument_coding)) | |
490 | /* We must encode this argument. */ | |
491 | args[i] = encode_coding_string (&argument_coding, args[i], 1); | |
492 | } | |
493 | for (i = 4; i < nargs; i++) | |
94fbc901 | 494 | new_argv[i - 3] = SSDATA (args[i]); |
e7c3fb06 EZ |
495 | new_argv[i - 3] = 0; |
496 | } | |
497 | else | |
498 | new_argv[1] = 0; | |
499 | if (STRING_MULTIBYTE (path)) | |
500 | path = ENCODE_FILE (path); | |
94fbc901 | 501 | new_argv[0] = SSDATA (path); |
e7c3fb06 EZ |
502 | UNGCPRO; |
503 | } | |
80856e74 | 504 | |
94fcd171 | 505 | discard_output = INTEGERP (buffer) || (NILP (buffer) && NILP (output_file)); |
7e6c2178 | 506 | |
94fcd171 PE |
507 | #ifdef MSDOS |
508 | if (! discard_output && ! STRINGP (output_file)) | |
7e6c2178 | 509 | { |
94fcd171 PE |
510 | char const *tmpdir = egetenv ("TMPDIR"); |
511 | char const *outf = tmpdir ? tmpdir : ""; | |
512 | tempfile = alloca (strlen (outf) + 20); | |
513 | strcpy (tempfile, outf); | |
bf6b4923 | 514 | dostounix_filename (tempfile); |
888c9e86 EZ |
515 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') |
516 | strcat (tempfile, "/"); | |
bf6b4923 | 517 | strcat (tempfile, "emXXXXXX"); |
888c9e86 | 518 | mktemp (tempfile); |
94fcd171 PE |
519 | if (!*tempfile) |
520 | report_file_error ("Opening process output file", Qnil); | |
521 | output_file = build_string (tempfile); | |
522 | synch_process_tempfile = output_file; | |
523 | } | |
524 | #endif | |
525 | ||
526 | if (discard_output) | |
527 | { | |
528 | fd_output = emacs_open (NULL_DEVICE, O_WRONLY, 0); | |
529 | if (fd_output < 0) | |
530 | report_file_error ("Opening null device", Qnil); | |
531 | } | |
532 | else if (STRINGP (output_file)) | |
533 | { | |
534 | fd_output = emacs_open (SSDATA (output_file), | |
535 | O_WRONLY | O_CREAT | O_TRUNC | O_TEXT, | |
536 | default_output_mode); | |
537 | if (fd_output < 0) | |
a773ed9a PE |
538 | { |
539 | int open_errno = errno; | |
94fcd171 | 540 | output_file = DECODE_FILE (output_file); |
a773ed9a | 541 | report_file_errno ("Opening process output file", |
94fcd171 | 542 | output_file, open_errno); |
a773ed9a | 543 | } |
7e6c2178 | 544 | } |
80856e74 JB |
545 | else |
546 | { | |
60aeceb8 | 547 | int fd[2]; |
c7ddc792 | 548 | if (emacs_pipe (fd) != 0) |
94fcd171 PE |
549 | report_file_error ("Creating process pipe", Qnil); |
550 | callproc_fd[CALLPROC_PIPEREAD] = fd[0]; | |
551 | fd_output = fd[1]; | |
80856e74 | 552 | } |
94fcd171 | 553 | callproc_fd[CALLPROC_STDOUT] = fd_output; |
80856e74 | 554 | |
94fcd171 | 555 | fd_error = fd_output; |
80856e74 | 556 | |
94fcd171 PE |
557 | if (STRINGP (error_file) || (NILP (error_file) && !discard_output)) |
558 | { | |
559 | fd_error = emacs_open ((STRINGP (error_file) | |
560 | ? SSDATA (error_file) | |
561 | : NULL_DEVICE), | |
406af475 PE |
562 | O_WRONLY | O_CREAT | O_TRUNC | O_TEXT, |
563 | default_output_mode); | |
94fcd171 PE |
564 | if (fd_error < 0) |
565 | { | |
566 | int open_errno = errno; | |
567 | report_file_errno ("Cannot redirect stderr", | |
568 | (STRINGP (error_file) | |
569 | ? DECODE_FILE (error_file) | |
570 | : build_string (NULL_DEVICE)), | |
571 | open_errno); | |
572 | } | |
573 | callproc_fd[CALLPROC_STDERR] = fd_error; | |
574 | } | |
89e1ec1d | 575 | |
2610078a | 576 | #ifdef MSDOS /* MW, July 1993 */ |
94fcd171 PE |
577 | /* Note that on MSDOS `child_setup' actually returns the child process |
578 | exit status, not its PID, so assign it to status below. */ | |
e1ad689c | 579 | pid = child_setup (*filefd, fd_output, fd_error, new_argv, 0, current_dir); |
94fcd171 PE |
580 | |
581 | if (pid < 0) | |
582 | { | |
583 | child_errno = errno; | |
3bf4baab | 584 | dynwind_end (); |
94fcd171 PE |
585 | synchronize_system_messages_locale (); |
586 | return | |
587 | code_convert_string_norecord (build_string (strerror (child_errno)), | |
588 | Vlocale_coding_system, 0); | |
589 | } | |
590 | status = pid; | |
591 | ||
592 | for (i = 0; i < CALLPROC_FDS; i++) | |
593 | if (0 <= callproc_fd[i]) | |
2610078a | 594 | { |
94fcd171 PE |
595 | emacs_close (callproc_fd[i]); |
596 | callproc_fd[i] = -1; | |
2610078a | 597 | } |
e1ad689c BT |
598 | emacs_close (*filefd); |
599 | *filefd = -1; | |
94fcd171 PE |
600 | |
601 | if (tempfile) | |
602 | { | |
603 | /* Since CRLF is converted to LF within `decode_coding', we | |
604 | can always open a file with binary mode. */ | |
605 | callproc_fd[CALLPROC_PIPEREAD] = emacs_open (tempfile, | |
606 | O_RDONLY | O_BINARY, 0); | |
607 | if (callproc_fd[CALLPROC_PIPEREAD] < 0) | |
608 | { | |
609 | int open_errno = errno; | |
610 | report_file_errno ("Cannot re-open temporary file", | |
611 | build_string (tempfile), open_errno); | |
612 | } | |
613 | } | |
614 | ||
644d3f0d | 615 | #endif /* MSDOS */ |
bb5f74ee | 616 | |
94fcd171 PE |
617 | /* Do the unwind-protect now, even though the pid is not known, so |
618 | that no storage allocation is done in the critical section. | |
619 | The actual PID will be filled in during the critical section. */ | |
620 | record_unwind_protect (call_process_cleanup, Fcurrent_buffer ()); | |
644d3f0d | 621 | |
94fcd171 | 622 | #ifndef MSDOS |
bb5f74ee | 623 | |
94fcd171 | 624 | block_input (); |
1e952f0a | 625 | block_child_signal (&oldset); |
bb5f74ee | 626 | |
bad95d8f | 627 | #ifdef WINDOWSNT |
e1ad689c | 628 | pid = child_setup (*filefd, fd_output, fd_error, new_argv, 0, current_dir); |
bad95d8f | 629 | #else /* not WINDOWSNT */ |
c0ad4ea5 | 630 | |
94fcd171 PE |
631 | /* vfork, and prevent local vars from being clobbered by the vfork. */ |
632 | { | |
633 | Lisp_Object volatile buffer_volatile = buffer; | |
634 | Lisp_Object volatile coding_systems_volatile = coding_systems; | |
635 | Lisp_Object volatile current_dir_volatile = current_dir; | |
636 | bool volatile display_p_volatile = display_p; | |
94fcd171 | 637 | int volatile fd_error_volatile = fd_error; |
e1ad689c | 638 | int *volatile filefd_volatile = filefd; |
94fcd171 PE |
639 | char **volatile new_argv_volatile = new_argv; |
640 | int volatile callproc_fd_volatile[CALLPROC_FDS]; | |
641 | for (i = 0; i < CALLPROC_FDS; i++) | |
642 | callproc_fd_volatile[i] = callproc_fd[i]; | |
643 | ||
644 | pid = vfork (); | |
645 | ||
646 | buffer = buffer_volatile; | |
647 | coding_systems = coding_systems_volatile; | |
648 | current_dir = current_dir_volatile; | |
649 | display_p = display_p_volatile; | |
94fcd171 PE |
650 | fd_error = fd_error_volatile; |
651 | filefd = filefd_volatile; | |
94fcd171 PE |
652 | new_argv = new_argv_volatile; |
653 | ||
654 | for (i = 0; i < CALLPROC_FDS; i++) | |
655 | callproc_fd[i] = callproc_fd_volatile[i]; | |
656 | fd_output = callproc_fd[CALLPROC_STDOUT]; | |
657 | } | |
bb5f74ee | 658 | |
94fcd171 PE |
659 | if (pid == 0) |
660 | { | |
1e952f0a | 661 | unblock_child_signal (&oldset); |
322aea6d | 662 | |
94fcd171 | 663 | setsid (); |
c0ad4ea5 | 664 | |
94fcd171 PE |
665 | /* Emacs ignores SIGPIPE, but the child should not. */ |
666 | signal (SIGPIPE, SIG_DFL); | |
507a173f AS |
667 | /* Likewise for SIGPROF. */ |
668 | #ifdef SIGPROF | |
669 | signal (SIGPROF, SIG_DFL); | |
670 | #endif | |
c0ad4ea5 | 671 | |
e1ad689c | 672 | child_setup (*filefd, fd_output, fd_error, new_argv, 0, current_dir); |
94fcd171 | 673 | } |
aba637ec | 674 | |
bad95d8f | 675 | #endif /* not WINDOWSNT */ |
cd5f8f60 | 676 | |
94fcd171 | 677 | child_errno = errno; |
bb5f74ee | 678 | |
94fcd171 | 679 | if (pid > 0) |
4a88129a PE |
680 | { |
681 | synch_process_pid = pid; | |
682 | ||
683 | if (INTEGERP (buffer)) | |
684 | { | |
e1ad689c BT |
685 | if (tempfile_ptr) |
686 | { | |
687 | record_deleted_pid (pid, *tempfile_ptr); | |
688 | *tempfile_ptr = Qnil; | |
689 | } | |
690 | else | |
691 | { | |
692 | record_deleted_pid (pid, Qnil); | |
693 | } | |
4a88129a PE |
694 | synch_process_pid = 0; |
695 | } | |
696 | } | |
bb5f74ee | 697 | |
1e952f0a | 698 | unblock_child_signal (&oldset); |
94fcd171 | 699 | unblock_input (); |
bb5f74ee | 700 | |
80856e74 | 701 | if (pid < 0) |
a773ed9a | 702 | report_file_errno ("Doing vfork", Qnil, child_errno); |
80856e74 | 703 | |
94fcd171 PE |
704 | /* Close our file descriptors, except for callproc_fd[CALLPROC_PIPEREAD] |
705 | since we will use that to read input from. */ | |
706 | for (i = 0; i < CALLPROC_FDS; i++) | |
707 | if (i != CALLPROC_PIPEREAD && 0 <= callproc_fd[i]) | |
708 | { | |
709 | emacs_close (callproc_fd[i]); | |
710 | callproc_fd[i] = -1; | |
711 | } | |
e1ad689c BT |
712 | emacs_close (*filefd); |
713 | *filefd = -1; | |
94fcd171 | 714 | |
bf6b4923 EZ |
715 | #endif /* not MSDOS */ |
716 | ||
d50d3dc8 | 717 | if (INTEGERP (buffer)) |
3bf4baab BT |
718 | { |
719 | dynwind_end (); | |
720 | return Qnil; | |
721 | } | |
80856e74 | 722 | |
d50d3dc8 | 723 | if (BUFFERP (buffer)) |
80856e74 JB |
724 | Fset_buffer (buffer); |
725 | ||
94fcd171 PE |
726 | fd0 = callproc_fd[CALLPROC_PIPEREAD]; |
727 | ||
728 | if (0 <= fd0) | |
09494912 RS |
729 | { |
730 | Lisp_Object val, *args2; | |
731 | ||
732 | val = Qnil; | |
733 | if (!NILP (Vcoding_system_for_read)) | |
734 | val = Vcoding_system_for_read; | |
735 | else | |
736 | { | |
737 | if (EQ (coding_systems, Qt)) | |
738 | { | |
f66c7cf8 | 739 | ptrdiff_t i; |
09494912 | 740 | |
0065d054 | 741 | SAFE_NALLOCA (args2, 1, nargs + 1); |
09494912 RS |
742 | args2[0] = Qcall_process; |
743 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
744 | coding_systems | |
745 | = Ffind_operation_coding_system (nargs + 1, args2); | |
746 | } | |
747 | if (CONSP (coding_systems)) | |
70949dac | 748 | val = XCAR (coding_systems); |
09494912 | 749 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 750 | val = XCAR (Vdefault_process_coding_system); |
09494912 RS |
751 | else |
752 | val = Qnil; | |
753 | } | |
91183bfd | 754 | Fcheck_coding_system (val); |
09494912 RS |
755 | /* In unibyte mode, character code conversion should not take |
756 | place but EOL conversion should. So, setup raw-text or one | |
757 | of the subsidiary according to the information just setup. */ | |
4b4deea2 | 758 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
09494912 | 759 | && !NILP (val)) |
91183bfd KH |
760 | val = raw_text_coding_system (val); |
761 | setup_coding_system (val, &process_coding); | |
659afede KH |
762 | process_coding.dst_multibyte |
763 | = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); | |
94fcd171 | 764 | process_coding.src_multibyte = 0; |
09494912 RS |
765 | } |
766 | ||
80856e74 JB |
767 | immediate_quit = 1; |
768 | QUIT; | |
769 | ||
94fcd171 | 770 | if (0 <= fd0) |
19ed11ba | 771 | { |
60aeceb8 PE |
772 | enum { CALLPROC_BUFFER_SIZE_MIN = 16 * 1024 }; |
773 | enum { CALLPROC_BUFFER_SIZE_MAX = 4 * CALLPROC_BUFFER_SIZE_MIN }; | |
774 | char buf[CALLPROC_BUFFER_SIZE_MAX]; | |
775 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; | |
2f221583 | 776 | int nread; |
19ed11ba AS |
777 | EMACS_INT total_read = 0; |
778 | int carryover = 0; | |
2f221583 | 779 | bool display_on_the_fly = display_p; |
94fcd171 | 780 | struct coding_system saved_coding = process_coding; |
19ed11ba | 781 | |
19ed11ba AS |
782 | while (1) |
783 | { | |
784 | /* Repeatedly read until we've filled as much as possible | |
785 | of the buffer size we have. But don't read | |
786 | less than 1024--save that for the next bufferful. */ | |
787 | nread = carryover; | |
788 | while (nread < bufsize - 1024) | |
789 | { | |
60aeceb8 | 790 | int this_read = emacs_read (fd0, buf + nread, |
19ed11ba | 791 | bufsize - nread); |
60558b19 | 792 | |
19ed11ba AS |
793 | if (this_read < 0) |
794 | goto give_up; | |
60558b19 | 795 | |
19ed11ba AS |
796 | if (this_read == 0) |
797 | { | |
798 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
799 | break; | |
800 | } | |
60558b19 | 801 | |
19ed11ba AS |
802 | nread += this_read; |
803 | total_read += this_read; | |
60558b19 | 804 | |
19ed11ba AS |
805 | if (display_on_the_fly) |
806 | break; | |
807 | } | |
60558b19 | 808 | |
19ed11ba AS |
809 | /* Now NREAD is the total amount of data in the buffer. */ |
810 | immediate_quit = 0; | |
177c0ea7 | 811 | |
c4e6b585 SM |
812 | if (!nread) |
813 | ; | |
814 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters)) | |
815 | && ! CODING_MAY_REQUIRE_DECODING (&process_coding)) | |
94fcd171 PE |
816 | insert_1_both (buf, nread, nread, 0, 1, 0); |
817 | else | |
818 | { /* We have to decode the input. */ | |
819 | Lisp_Object curbuf; | |
94fcd171 | 820 | |
3bf4baab | 821 | dynwind_begin (); |
94fcd171 | 822 | XSETBUFFER (curbuf, current_buffer); |
c4e6b585 | 823 | /* FIXME: Call signal_after_change! */ |
d57f4dde | 824 | prepare_to_modify_buffer (PT, PT, NULL); |
94fcd171 PE |
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); | |
3bf4baab | 833 | dynwind_end (); |
94fcd171 PE |
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 | { | |
19ed11ba AS |
877 | redisplay_preserve_echo_area (1); |
878 | /* This variable might have been set to 0 for code | |
94fcd171 | 879 | detection. In that case, set it back to 1 because |
19ed11ba AS |
880 | we should have already detected a coding system. */ |
881 | display_on_the_fly = 1; | |
882 | } | |
883 | immediate_quit = 1; | |
884 | QUIT; | |
885 | } | |
886 | give_up: ; | |
887 | ||
888 | Vlast_coding_system_used = CODING_ID_NAME (process_coding.id); | |
889 | /* If the caller required, let the buffer inherit the | |
890 | coding-system used to decode the process output. */ | |
891 | if (inherit_process_coding_system) | |
892 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
893 | make_number (total_read)); | |
894 | } | |
3b440bb5 | 895 | |
77defa9a | 896 | #ifndef MSDOS |
80856e74 | 897 | /* Wait for it to terminate, unless it already has. */ |
94fcd171 | 898 | wait_for_termination (pid, &status, fd0 < 0); |
77defa9a | 899 | #endif |
80856e74 JB |
900 | |
901 | immediate_quit = 0; | |
902 | ||
37d54121 RS |
903 | /* Don't kill any children that the subprocess may have left behind |
904 | when exiting. */ | |
bb5f74ee | 905 | synch_process_pid = 0; |
37d54121 | 906 | |
3c59b4c9 | 907 | SAFE_FREE (); |
3bf4baab | 908 | dynwind_end (); |
80856e74 | 909 | |
bb5f74ee | 910 | if (WIFSIGNALED (status)) |
6b61353c | 911 | { |
42ca4633 | 912 | const char *signame; |
6b61353c KH |
913 | |
914 | synchronize_system_messages_locale (); | |
bb5f74ee | 915 | signame = strsignal (WTERMSIG (status)); |
6b61353c KH |
916 | |
917 | if (signame == 0) | |
19ed11ba | 918 | signame = "unknown"; |
6b61353c | 919 | |
bb5f74ee PE |
920 | return code_convert_string_norecord (build_string (signame), |
921 | Vlocale_coding_system, 0); | |
6b61353c KH |
922 | } |
923 | ||
bb5f74ee PE |
924 | eassert (WIFEXITED (status)); |
925 | return make_number (WEXITSTATUS (status)); | |
80856e74 | 926 | } |
80856e74 | 927 | \f |
bafe80ce PE |
928 | /* Create a temporary file suitable for storing the input data of |
929 | call-process-region. NARGS and ARGS are the same as for | |
94fcd171 PE |
930 | call-process-region. Store into *FILENAME_STRING_PTR a Lisp string |
931 | naming the file, and return a file descriptor for reading. | |
932 | Unwind-protect the file, so that the file descriptor will be closed | |
933 | and the file removed when the caller unwinds the specpdl stack. */ | |
fdb82f93 | 934 | |
e1ad689c | 935 | static void |
94fcd171 | 936 | create_temp_file (ptrdiff_t nargs, Lisp_Object *args, |
e1ad689c | 937 | Lisp_Object *filename_string_ptr, int *fdp) |
80856e74 | 938 | { |
94fcd171 | 939 | int fd; |
39323a7e KH |
940 | struct gcpro gcpro1; |
941 | Lisp_Object filename_string; | |
bafe80ce | 942 | Lisp_Object val, start, end; |
98c6f1e3 | 943 | Lisp_Object tmpdir; |
7e6c2178 | 944 | |
f92d51d8 CY |
945 | if (STRINGP (Vtemporary_file_directory)) |
946 | tmpdir = Vtemporary_file_directory; | |
7e6c2178 RS |
947 | else |
948 | { | |
83be8524 | 949 | char *outf; |
f92d51d8 | 950 | #ifndef DOS_NT |
83be8524 PE |
951 | outf = getenv ("TMPDIR"); |
952 | tmpdir = build_string (outf ? outf : "/tmp/"); | |
f92d51d8 | 953 | #else /* DOS_NT */ |
f92d51d8 CY |
954 | if ((outf = egetenv ("TMPDIR")) |
955 | || (outf = egetenv ("TMP")) | |
956 | || (outf = egetenv ("TEMP"))) | |
957 | tmpdir = build_string (outf); | |
958 | else | |
959 | tmpdir = Ffile_name_as_directory (build_string ("c:/temp")); | |
0774fcf8 | 960 | #endif |
f92d51d8 | 961 | } |
7e6c2178 | 962 | |
3c59b4c9 | 963 | { |
98c6f1e3 | 964 | Lisp_Object pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir); |
74ba1583 | 965 | char *tempfile; |
94fcd171 | 966 | ptrdiff_t count; |
74ba1583 EZ |
967 | |
968 | #ifdef WINDOWSNT | |
969 | /* Cannot use the result of Fexpand_file_name, because it | |
970 | downcases the XXXXXX part of the pattern, and mktemp then | |
971 | doesn't recognize it. */ | |
972 | if (!NILP (Vw32_downcase_file_names)) | |
973 | { | |
974 | Lisp_Object dirname = Ffile_name_directory (pattern); | |
975 | ||
976 | if (NILP (dirname)) | |
977 | pattern = Vtemp_file_name_pattern; | |
978 | else | |
979 | pattern = concat2 (dirname, Vtemp_file_name_pattern); | |
980 | } | |
981 | #endif | |
982 | ||
bafe80ce PE |
983 | filename_string = Fcopy_sequence (ENCODE_FILE (pattern)); |
984 | GCPRO1 (filename_string); | |
985 | tempfile = SSDATA (filename_string); | |
09494912 | 986 | |
94fcd171 PE |
987 | fd = mkostemp (tempfile, O_CLOEXEC); |
988 | if (fd < 0) | |
989 | report_file_error ("Failed to open temporary file using pattern", | |
990 | pattern); | |
e1ad689c BT |
991 | *fdp = fd; |
992 | *filename_string_ptr = filename_string; | |
993 | record_unwind_protect (delete_temp_file_ptr, filename_string_ptr); | |
994 | record_unwind_protect_ptr (close_file_ptr_unwind, fdp); | |
3c59b4c9 PE |
995 | } |
996 | ||
80856e74 JB |
997 | start = args[0]; |
998 | end = args[1]; | |
32d08644 | 999 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
1000 | if (!NILP (Vcoding_system_for_write)) |
1001 | val = Vcoding_system_for_write; | |
4b4deea2 | 1002 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
fcaf8878 | 1003 | val = Qraw_text; |
32d08644 | 1004 | else |
beacaab3 | 1005 | { |
bafe80ce PE |
1006 | Lisp_Object coding_systems; |
1007 | Lisp_Object *args2; | |
3c59b4c9 | 1008 | USE_SAFE_ALLOCA; |
0065d054 | 1009 | SAFE_NALLOCA (args2, 1, nargs + 1); |
91489411 | 1010 | args2[0] = Qcall_process_region; |
bafe80ce | 1011 | memcpy (args2 + 1, args, nargs * sizeof *args); |
91489411 | 1012 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 1013 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
3c59b4c9 | 1014 | SAFE_FREE (); |
beacaab3 | 1015 | } |
fcaf8878 | 1016 | val = complement_process_encoding_system (val); |
32d08644 | 1017 | |
168afdaa | 1018 | { |
3200038e | 1019 | dynwind_begin (); |
168afdaa RS |
1020 | |
1021 | specbind (intern ("coding-system-for-write"), val); | |
bb951f0e KR |
1022 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
1023 | happen to get a ".Z" suffix. */ | |
1024 | specbind (intern ("file-name-handler-alist"), Qnil); | |
94fcd171 | 1025 | write_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil, fd); |
168afdaa | 1026 | |
3200038e | 1027 | dynwind_end (); |
168afdaa | 1028 | } |
91489411 | 1029 | |
94fcd171 PE |
1030 | if (lseek (fd, 0, SEEK_SET) < 0) |
1031 | report_file_error ("Setting file position", filename_string); | |
1032 | ||
177c0ea7 | 1033 | /* Note that Fcall_process takes care of binding |
91489411 | 1034 | coding-system-for-read. */ |
093650fe | 1035 | |
94fcd171 | 1036 | UNGCPRO; |
bafe80ce PE |
1037 | } |
1038 | ||
1039 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
1040 | 3, MANY, 0, | |
1041 | doc: /* Send text from START to END to a synchronous process running PROGRAM. | |
1042 | The remaining arguments are optional. | |
1043 | Delete the text if fourth arg DELETE is non-nil. | |
1044 | ||
1045 | Insert output in BUFFER before point; t means current buffer; nil for | |
1046 | BUFFER means discard it; 0 means discard and don't wait; and `(:file | |
1047 | FILE)', where FILE is a file name string, means that it should be | |
1048 | written to that file (if the file already exists it is overwritten). | |
1049 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, | |
1050 | REAL-BUFFER says what to do with standard output, as above, | |
1051 | while STDERR-FILE says what to do with standard error in the child. | |
1052 | STDERR-FILE may be nil (discard standard error output), | |
1053 | t (mix it with ordinary output), or a file name string. | |
1054 | ||
1055 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
1056 | Remaining args are passed to PROGRAM at startup as command args. | |
1057 | ||
1058 | If BUFFER is 0, `call-process-region' returns immediately with value nil. | |
1059 | Otherwise it waits for PROGRAM to terminate | |
1060 | and returns a numeric exit status or a signal description string. | |
1061 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. | |
1062 | ||
1063 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) | |
1064 | (ptrdiff_t nargs, Lisp_Object *args) | |
1065 | { | |
4a88129a | 1066 | struct gcpro gcpro1; |
94fcd171 | 1067 | Lisp_Object infile, val; |
3200038e | 1068 | dynwind_begin (); |
bafe80ce PE |
1069 | Lisp_Object start = args[0]; |
1070 | Lisp_Object end = args[1]; | |
1071 | bool empty_input; | |
94fcd171 | 1072 | int fd; |
bafe80ce PE |
1073 | |
1074 | if (STRINGP (start)) | |
1075 | empty_input = SCHARS (start) == 0; | |
1076 | else if (NILP (start)) | |
1077 | empty_input = BEG == Z; | |
1078 | else | |
1079 | { | |
1080 | validate_region (&args[0], &args[1]); | |
1081 | start = args[0]; | |
1082 | end = args[1]; | |
1083 | empty_input = XINT (start) == XINT (end); | |
1084 | } | |
1085 | ||
94fcd171 | 1086 | if (!empty_input) |
e1ad689c | 1087 | create_temp_file (nargs, args, &infile, &fd); |
94fcd171 PE |
1088 | else |
1089 | { | |
1090 | infile = Qnil; | |
1091 | fd = emacs_open (NULL_DEVICE, O_RDONLY, 0); | |
1092 | if (fd < 0) | |
1093 | report_file_error ("Opening null device", Qnil); | |
e1ad689c | 1094 | record_unwind_protect_ptr (close_file_ptr_unwind, &fd); |
94fcd171 PE |
1095 | } |
1096 | ||
4a88129a | 1097 | GCPRO1 (infile); |
80856e74 | 1098 | |
edf496dd | 1099 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
1100 | Fdelete_region (start, end); |
1101 | ||
edf496dd KH |
1102 | if (nargs > 3) |
1103 | { | |
1104 | args += 2; | |
1105 | nargs -= 2; | |
1106 | } | |
1107 | else | |
1108 | { | |
1109 | args[0] = args[2]; | |
1110 | nargs = 2; | |
1111 | } | |
50a30cce | 1112 | args[1] = infile; |
80856e74 | 1113 | |
e1ad689c | 1114 | val = call_process (nargs, args, &fd, &infile); |
3200038e BT |
1115 | dynwind_end (); |
1116 | return val; | |
80856e74 JB |
1117 | } |
1118 | \f | |
361358ea | 1119 | #ifndef WINDOWSNT |
971de7fb | 1120 | static int relocate_fd (int fd, int minfd); |
361358ea | 1121 | #endif |
dfcf069d | 1122 | |
5990851d KL |
1123 | static char ** |
1124 | add_env (char **env, char **new_env, char *string) | |
1125 | { | |
1126 | char **ep; | |
2f221583 | 1127 | bool ok = 1; |
5990851d KL |
1128 | if (string == NULL) |
1129 | return new_env; | |
1130 | ||
1131 | /* See if this string duplicates any string already in the env. | |
1132 | If so, don't put it in. | |
1133 | When an env var has multiple definitions, | |
1134 | we keep the definition that comes first in process-environment. */ | |
1135 | for (ep = env; ok && ep != new_env; ep++) | |
1136 | { | |
1137 | char *p = *ep, *q = string; | |
1138 | while (ok) | |
19ed11ba AS |
1139 | { |
1140 | if (*q != *p) | |
1141 | break; | |
1142 | if (*q == 0) | |
1143 | /* The string is a lone variable name; keep it for now, we | |
1144 | will remove it later. It is a placeholder for a | |
1145 | variable that is not to be included in the environment. */ | |
1146 | break; | |
1147 | if (*q == '=') | |
1148 | ok = 0; | |
1149 | p++, q++; | |
1150 | } | |
5990851d KL |
1151 | } |
1152 | if (ok) | |
1153 | *new_env++ = string; | |
1154 | return new_env; | |
1155 | } | |
1156 | ||
80856e74 JB |
1157 | /* This is the last thing run in a newly forked inferior |
1158 | either synchronous or asynchronous. | |
1159 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
1160 | Initialize inferior's priority, pgrp, connected dir and environment. | |
1161 | then exec another program based on new_argv. | |
1162 | ||
2f221583 | 1163 | If SET_PGRP, put the subprocess into a separate process group. |
e576cab4 JB |
1164 | |
1165 | CURRENT_DIR is an elisp string giving the path of the current | |
1166 | directory the subprocess should have. Since we can't really signal | |
1167 | a decent error from within the child, this should be verified as an | |
1168 | executable directory by the parent. */ | |
80856e74 | 1169 | |
dfcf069d | 1170 | int |
2f221583 PE |
1171 | child_setup (int in, int out, int err, char **new_argv, bool set_pgrp, |
1172 | Lisp_Object current_dir) | |
80856e74 | 1173 | { |
e576cab4 | 1174 | char **env; |
7fcf7f05 | 1175 | char *pwd_var; |
bad95d8f RS |
1176 | #ifdef WINDOWSNT |
1177 | int cpid; | |
4252a4bd | 1178 | HANDLE handles[3]; |
afacaa1b JB |
1179 | #else |
1180 | int exec_errno; | |
e576cab4 | 1181 | |
d311d28c | 1182 | pid_t pid = getpid (); |
afacaa1b | 1183 | #endif /* WINDOWSNT */ |
80856e74 | 1184 | |
80856e74 JB |
1185 | /* Note that use of alloca is always safe here. It's obvious for systems |
1186 | that do not have true vfork or that have true (stack) alloca. | |
caa01fe0 GM |
1187 | If using vfork and C_ALLOCA (when Emacs used to include |
1188 | src/alloca.c) it is safe because that changes the superior's | |
1189 | static variables as if the superior had done alloca and will be | |
1190 | cleaned up in the usual way. */ | |
e576cab4 | 1191 | { |
c365c355 PE |
1192 | char *temp; |
1193 | ptrdiff_t i; | |
77d78be1 | 1194 | |
d5db4077 | 1195 | i = SBYTES (current_dir); |
16425c4a EZ |
1196 | #ifdef MSDOS |
1197 | /* MSDOS must have all environment variables malloc'ed, because | |
1198 | low-level libc functions that launch subsidiary processes rely | |
1199 | on that. */ | |
c365c355 | 1200 | pwd_var = xmalloc (i + 5); |
16425c4a | 1201 | #else |
c365c355 | 1202 | pwd_var = alloca (i + 5); |
16425c4a | 1203 | #endif |
7fcf7f05 | 1204 | temp = pwd_var + 4; |
72af86bd | 1205 | memcpy (pwd_var, "PWD=", 4); |
c365c355 | 1206 | strcpy (temp, SSDATA (current_dir)); |
e576cab4 | 1207 | |
c17c4250 | 1208 | #ifndef DOS_NT |
e576cab4 JB |
1209 | /* We can't signal an Elisp error here; we're in a vfork. Since |
1210 | the callers check the current directory before forking, this | |
1211 | should only return an error if the directory's permissions | |
1212 | are changed between the check and this chdir, but we should | |
1213 | at least check. */ | |
1214 | if (chdir (temp) < 0) | |
4ebbdd67 | 1215 | _exit (EXIT_CANCELED); |
f8d23104 | 1216 | #else /* DOS_NT */ |
c17c4250 EZ |
1217 | /* Get past the drive letter, so that d:/ is left alone. */ |
1218 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
1219 | { | |
1220 | temp += 2; | |
1221 | i -= 2; | |
1222 | } | |
f8d23104 | 1223 | #endif /* DOS_NT */ |
c17c4250 | 1224 | |
7fcf7f05 | 1225 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 1226 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 1227 | temp[--i] = 0; |
e576cab4 | 1228 | } |
80856e74 | 1229 | |
5990851d | 1230 | /* Set `env' to a vector of the strings in the environment. */ |
80856e74 JB |
1231 | { |
1232 | register Lisp_Object tem; | |
1233 | register char **new_env; | |
5990851d | 1234 | char **p, **q; |
80856e74 | 1235 | register int new_length; |
d2bb6598 | 1236 | Lisp_Object display = Qnil; |
361358ea | 1237 | |
80856e74 | 1238 | new_length = 0; |
f105f403 | 1239 | |
80856e74 | 1240 | for (tem = Vprocess_environment; |
19ed11ba AS |
1241 | CONSP (tem) && STRINGP (XCAR (tem)); |
1242 | tem = XCDR (tem)) | |
d2bb6598 | 1243 | { |
42a5b22f | 1244 | if (strncmp (SSDATA (XCAR (tem)), "DISPLAY", 7) == 0 |
d2bb6598 SM |
1245 | && (SDATA (XCAR (tem)) [7] == '\0' |
1246 | || SDATA (XCAR (tem)) [7] == '=')) | |
1247 | /* DISPLAY is specified in process-environment. */ | |
1248 | display = Qt; | |
1249 | new_length++; | |
1250 | } | |
de87fb59 | 1251 | |
d2bb6598 SM |
1252 | /* If not provided yet, use the frame's DISPLAY. */ |
1253 | if (NILP (display)) | |
1254 | { | |
1255 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); | |
1256 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) | |
1257 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1258 | tmp = Fgetenv_internal (build_string ("DISPLAY"), | |
1259 | Vinitial_environment); | |
1260 | if (STRINGP (tmp)) | |
1261 | { | |
1262 | display = tmp; | |
1263 | new_length++; | |
1264 | } | |
1265 | } | |
80856e74 | 1266 | |
7fcf7f05 | 1267 | /* new_length + 2 to include PWD and terminating 0. */ |
38182d90 | 1268 | env = new_env = alloca ((new_length + 2) * sizeof *env); |
7fcf7f05 RS |
1269 | /* If we have a PWD envvar, pass one down, |
1270 | but with corrected value. */ | |
a13f8f50 | 1271 | if (egetenv ("PWD")) |
7fcf7f05 | 1272 | *new_env++ = pwd_var; |
361358ea | 1273 | |
6b8e474c | 1274 | if (STRINGP (display)) |
de87fb59 | 1275 | { |
38182d90 | 1276 | char *vdata = alloca (sizeof "DISPLAY=" + SBYTES (display)); |
de87fb59 | 1277 | strcpy (vdata, "DISPLAY="); |
42a5b22f | 1278 | strcat (vdata, SSDATA (display)); |
de87fb59 DN |
1279 | new_env = add_env (env, new_env, vdata); |
1280 | } | |
80856e74 | 1281 | |
5990851d | 1282 | /* Overrides. */ |
80856e74 | 1283 | for (tem = Vprocess_environment; |
70949dac KR |
1284 | CONSP (tem) && STRINGP (XCAR (tem)); |
1285 | tem = XCDR (tem)) | |
42a5b22f | 1286 | new_env = add_env (env, new_env, SSDATA (XCAR (tem))); |
d2bb6598 | 1287 | |
5990851d KL |
1288 | *new_env = 0; |
1289 | ||
1290 | /* Remove variable names without values. */ | |
1291 | p = q = env; | |
1292 | while (*p != 0) | |
cd9565ba | 1293 | { |
19ed11ba AS |
1294 | while (*q != 0 && strchr (*q, '=') == NULL) |
1295 | q++; | |
1296 | *p = *q++; | |
1297 | if (*p != 0) | |
1298 | p++; | |
cd9565ba | 1299 | } |
80856e74 | 1300 | } |
de87fb59 | 1301 | |
361358ea | 1302 | |
bad95d8f RS |
1303 | #ifdef WINDOWSNT |
1304 | prepare_standard_handles (in, out, err, handles); | |
d5db4077 | 1305 | set_process_dir (SDATA (current_dir)); |
d3d14b40 | 1306 | /* Spawn the child. (See w32proc.c:sys_spawnve). */ |
67802943 DN |
1307 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); |
1308 | reset_standard_handles (in, out, err, handles); | |
1309 | if (cpid == -1) | |
1310 | /* An error occurred while trying to spawn the process. */ | |
1311 | report_file_error ("Spawning child process", Qnil); | |
1312 | return cpid; | |
1313 | ||
bad95d8f | 1314 | #else /* not WINDOWSNT */ |
426b37ae JB |
1315 | /* Make sure that in, out, and err are not actually already in |
1316 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1317 | started with its standard in, out, or error closed, as might |
426b37ae | 1318 | happen under X. */ |
f29f9e4a RS |
1319 | { |
1320 | int oin = in, oout = out; | |
1321 | ||
1322 | /* We have to avoid relocating the same descriptor twice! */ | |
1323 | ||
1324 | in = relocate_fd (in, 3); | |
1325 | ||
1326 | if (out == oin) | |
1327 | out = in; | |
1328 | else | |
3e9367e7 | 1329 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1330 | |
1331 | if (err == oin) | |
1332 | err = in; | |
1333 | else if (err == oout) | |
1334 | err = out; | |
1335 | else | |
3e9367e7 | 1336 | err = relocate_fd (err, 3); |
f29f9e4a | 1337 | } |
426b37ae | 1338 | |
c17c4250 | 1339 | #ifndef MSDOS |
4700b5a5 PE |
1340 | /* Redirect file descriptors and clear the close-on-exec flag on the |
1341 | redirected ones. IN, OUT, and ERR are close-on-exec so they | |
1342 | need not be closed explicitly. */ | |
80856e74 JB |
1343 | dup2 (in, 0); |
1344 | dup2 (out, 1); | |
1345 | dup2 (err, 2); | |
067428c1 | 1346 | |
dd0333b6 | 1347 | setpgid (0, 0); |
12e610e8 | 1348 | tcsetpgrp (0, pid); |
a7ebc409 | 1349 | |
21e54a94 | 1350 | execve (new_argv[0], new_argv, env); |
ee010797 | 1351 | exec_errno = errno; |
80856e74 | 1352 | |
ee010797 PE |
1353 | /* Avoid deadlock if the child's perror writes to a full pipe; the |
1354 | pipe's reader is the parent, but with vfork the parent can't | |
1355 | run until the child exits. Truncate the diagnostic instead. */ | |
1356 | fcntl (STDERR_FILENO, F_SETFL, O_NONBLOCK); | |
4ebbdd67 | 1357 | |
ee010797 PE |
1358 | errno = exec_errno; |
1359 | emacs_perror (new_argv[0]); | |
1360 | _exit (exec_errno == ENOENT ? EXIT_ENOENT : EXIT_CANNOT_INVOKE); | |
67802943 DN |
1361 | |
1362 | #else /* MSDOS */ | |
1363 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
1364 | xfree (pwd_var); | |
1365 | if (pid == -1) | |
1366 | /* An error occurred while trying to run the subprocess. */ | |
1367 | report_file_error ("Spawning child process", Qnil); | |
1368 | return pid; | |
1369 | #endif /* MSDOS */ | |
ae76d9e1 | 1370 | #endif /* not WINDOWSNT */ |
80856e74 JB |
1371 | } |
1372 | ||
361358ea | 1373 | #ifndef WINDOWSNT |
a3833dfe | 1374 | /* Move the file descriptor FD so that its number is not less than MINFD. |
4700b5a5 PE |
1375 | If the file descriptor is moved at all, the original is closed on MSDOS, |
1376 | but not elsewhere as the caller will close it anyway. */ | |
dfcf069d | 1377 | static int |
971de7fb | 1378 | relocate_fd (int fd, int minfd) |
426b37ae | 1379 | { |
a3833dfe | 1380 | if (fd >= minfd) |
426b37ae JB |
1381 | return fd; |
1382 | else | |
1383 | { | |
067428c1 | 1384 | int new = fcntl (fd, F_DUPFD_CLOEXEC, minfd); |
426b37ae JB |
1385 | if (new == -1) |
1386 | { | |
4ebbdd67 PE |
1387 | emacs_perror ("while setting up child"); |
1388 | _exit (EXIT_CANCELED); | |
426b37ae | 1389 | } |
4700b5a5 | 1390 | #ifdef MSDOS |
68c45bf0 | 1391 | emacs_close (fd); |
4700b5a5 | 1392 | #endif |
426b37ae JB |
1393 | return new; |
1394 | } | |
1395 | } | |
361358ea | 1396 | #endif /* not WINDOWSNT */ |
426b37ae | 1397 | |
2f221583 | 1398 | static bool |
989f33ba PE |
1399 | getenv_internal_1 (const char *var, ptrdiff_t varlen, char **value, |
1400 | ptrdiff_t *valuelen, Lisp_Object env) | |
012c6fcb | 1401 | { |
db699fc6 | 1402 | for (; CONSP (env); env = XCDR (env)) |
012c6fcb | 1403 | { |
db699fc6 | 1404 | Lisp_Object entry = XCAR (env); |
d50d3dc8 | 1405 | if (STRINGP (entry) |
db699fc6 | 1406 | && SBYTES (entry) >= varlen |
bad95d8f RS |
1407 | #ifdef WINDOWSNT |
1408 | /* NT environment variables are case insensitive. */ | |
d5db4077 | 1409 | && ! strnicmp (SDATA (entry), var, varlen) |
bad95d8f | 1410 | #else /* not WINDOWSNT */ |
72af86bd | 1411 | && ! memcmp (SDATA (entry), var, varlen) |
bad95d8f | 1412 | #endif /* not WINDOWSNT */ |
a9971c6d | 1413 | ) |
012c6fcb | 1414 | { |
db699fc6 SM |
1415 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') |
1416 | { | |
51b59d79 | 1417 | *value = SSDATA (entry) + (varlen + 1); |
db699fc6 SM |
1418 | *valuelen = SBYTES (entry) - (varlen + 1); |
1419 | return 1; | |
1420 | } | |
1421 | else if (SBYTES (entry) == varlen) | |
1422 | { | |
1423 | /* Lone variable names in Vprocess_environment mean that | |
1424 | variable should be removed from the environment. */ | |
1425 | *value = NULL; | |
1426 | return 1; | |
1427 | } | |
1428 | } | |
1429 | } | |
1430 | return 0; | |
1431 | } | |
1432 | ||
2f221583 | 1433 | static bool |
989f33ba PE |
1434 | getenv_internal (const char *var, ptrdiff_t varlen, char **value, |
1435 | ptrdiff_t *valuelen, Lisp_Object frame) | |
012c6fcb | 1436 | { |
d2bb6598 SM |
1437 | /* Try to find VAR in Vprocess_environment first. */ |
1438 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1439 | Vprocess_environment)) | |
1440 | return *value ? 1 : 0; | |
f105f403 | 1441 | |
d2bb6598 | 1442 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
de87fb59 | 1443 | if (strcmp (var, "DISPLAY") == 0) |
d2bb6598 SM |
1444 | { |
1445 | Lisp_Object display | |
1446 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); | |
1447 | if (STRINGP (display)) | |
1448 | { | |
51b59d79 | 1449 | *value = SSDATA (display); |
de87fb59 | 1450 | *valuelen = SBYTES (display); |
012c6fcb JA |
1451 | return 1; |
1452 | } | |
d2bb6598 SM |
1453 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
1454 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1455 | Vinitial_environment)) | |
1456 | return *value ? 1 : 0; | |
012c6fcb JA |
1457 | } |
1458 | ||
1459 | return 0; | |
1460 | } | |
1461 | ||
f105f403 | 1462 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
5990851d KL |
1463 | doc: /* Get the value of environment variable VARIABLE. |
1464 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
1465 | the environment. Otherwise, value is a string. | |
f105f403 | 1466 | |
acf20901 | 1467 | This function searches `process-environment' for VARIABLE. |
5990851d | 1468 | |
db699fc6 | 1469 | If optional parameter ENV is a list, then search this list instead of |
acf20901 JB |
1470 | `process-environment', and return t when encountering a negative entry |
1471 | \(an entry for a variable with no value). */) | |
5842a27b | 1472 | (Lisp_Object variable, Lisp_Object env) |
012c6fcb JA |
1473 | { |
1474 | char *value; | |
989f33ba | 1475 | ptrdiff_t valuelen; |
012c6fcb | 1476 | |
5990851d | 1477 | CHECK_STRING (variable); |
db699fc6 SM |
1478 | if (CONSP (env)) |
1479 | { | |
42a5b22f | 1480 | if (getenv_internal_1 (SSDATA (variable), SBYTES (variable), |
db699fc6 SM |
1481 | &value, &valuelen, env)) |
1482 | return value ? make_string (value, valuelen) : Qt; | |
1483 | else | |
1484 | return Qnil; | |
1485 | } | |
42a5b22f | 1486 | else if (getenv_internal (SSDATA (variable), SBYTES (variable), |
d2bb6598 | 1487 | &value, &valuelen, env)) |
012c6fcb JA |
1488 | return make_string (value, valuelen); |
1489 | else | |
1490 | return Qnil; | |
1491 | } | |
1492 | ||
5990851d KL |
1493 | /* A version of getenv that consults the Lisp environment lists, |
1494 | easily callable from C. */ | |
012c6fcb | 1495 | char * |
a8fe7202 | 1496 | egetenv (const char *var) |
012c6fcb JA |
1497 | { |
1498 | char *value; | |
25c7e41f | 1499 | ptrdiff_t valuelen; |
012c6fcb | 1500 | |
f105f403 | 1501 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
012c6fcb JA |
1502 | return value; |
1503 | else | |
1504 | return 0; | |
1505 | } | |
1506 | ||
80856e74 | 1507 | \f |
8de15d69 | 1508 | /* This is run before init_cmdargs. */ |
177c0ea7 | 1509 | |
dfcf069d | 1510 | void |
971de7fb | 1511 | init_callproc_1 (void) |
8de15d69 | 1512 | { |
d01ba2f1 GM |
1513 | #ifdef HAVE_NS |
1514 | const char *etc_dir = ns_etc_directory (); | |
cbb31951 | 1515 | const char *path_exec = ns_exec_path (); |
d01ba2f1 | 1516 | #endif |
35a2f4b8 | 1517 | |
76151e2c | 1518 | Vdata_directory = decode_env_path ("EMACSDATA", |
d01ba2f1 | 1519 | #ifdef HAVE_NS |
76151e2c | 1520 | etc_dir ? etc_dir : |
d01ba2f1 | 1521 | #endif |
17e0445b | 1522 | PATH_DATA, 0); |
76151e2c EZ |
1523 | Vdata_directory = Ffile_name_as_directory (Fcar (Vdata_directory)); |
1524 | ||
1525 | Vdoc_directory = decode_env_path ("EMACSDOC", | |
d01ba2f1 | 1526 | #ifdef HAVE_NS |
76151e2c | 1527 | etc_dir ? etc_dir : |
d01ba2f1 | 1528 | #endif |
17e0445b | 1529 | PATH_DOC, 0); |
76151e2c | 1530 | Vdoc_directory = Ffile_name_as_directory (Fcar (Vdoc_directory)); |
9453ea7b | 1531 | |
e576cab4 | 1532 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1533 | PATH_EXEC path from epaths.h. */ |
cbb31951 GM |
1534 | Vexec_path = decode_env_path ("EMACSPATH", |
1535 | #ifdef HAVE_NS | |
1536 | path_exec ? path_exec : | |
1537 | #endif | |
17e0445b | 1538 | PATH_EXEC, 0); |
80856e74 | 1539 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
cbb31951 | 1540 | /* FIXME? For ns, path_exec should go at the front? */ |
17e0445b | 1541 | Vexec_path = nconc2 (decode_env_path ("PATH", "", 0), Vexec_path); |
8de15d69 RS |
1542 | } |
1543 | ||
e17f7533 | 1544 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1545 | |
dfcf069d | 1546 | void |
971de7fb | 1547 | init_callproc (void) |
8de15d69 RS |
1548 | { |
1549 | char *data_dir = egetenv ("EMACSDATA"); | |
177c0ea7 | 1550 | |
8de15d69 RS |
1551 | register char * sh; |
1552 | Lisp_Object tempdir; | |
d01ba2f1 GM |
1553 | #ifdef HAVE_NS |
1554 | if (data_dir == 0) | |
1555 | { | |
1556 | const char *etc_dir = ns_etc_directory (); | |
1557 | if (etc_dir) | |
1558 | { | |
1559 | data_dir = alloca (strlen (etc_dir) + 1); | |
1560 | strcpy (data_dir, etc_dir); | |
1561 | } | |
1562 | } | |
1563 | #endif | |
8de15d69 | 1564 | |
9cc4fad5 | 1565 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1566 | { |
05630743 RS |
1567 | /* Add to the path the lib-src subdir of the installation dir. */ |
1568 | Lisp_Object tem; | |
1569 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1570 | Vinstallation_directory); | |
76151e2c | 1571 | #ifndef MSDOS |
1a6640ec | 1572 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc | 1573 | if (NILP (Fmember (tem, Vexec_path))) |
70ec1377 | 1574 | { |
cbb31951 GM |
1575 | #ifdef HAVE_NS |
1576 | const char *path_exec = ns_exec_path (); | |
1577 | #endif | |
1578 | Vexec_path = decode_env_path ("EMACSPATH", | |
1579 | #ifdef HAVE_NS | |
1580 | path_exec ? path_exec : | |
1581 | #endif | |
17e0445b | 1582 | PATH_EXEC, 0); |
70ec1377 | 1583 | Vexec_path = Fcons (tem, Vexec_path); |
17e0445b | 1584 | Vexec_path = nconc2 (decode_env_path ("PATH", "", 0), Vexec_path); |
70ec1377 | 1585 | } |
177c0ea7 | 1586 | |
0fa248bc | 1587 | Vexec_directory = Ffile_name_as_directory (tem); |
76151e2c | 1588 | #endif /* not MSDOS */ |
8de15d69 | 1589 | |
e17f7533 RS |
1590 | /* Maybe use ../etc as well as ../lib-src. */ |
1591 | if (data_dir == 0) | |
1592 | { | |
1593 | tem = Fexpand_file_name (build_string ("etc"), | |
1594 | Vinstallation_directory); | |
1595 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1596 | } |
1597 | } | |
7e933683 RS |
1598 | |
1599 | /* Look for the files that should be in etc. We don't use | |
1600 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1601 | near the executable, and they are never in the build |
7e933683 RS |
1602 | directory when that's different from the source directory. |
1603 | ||
1604 | Instead, if these files are not in the nominal place, we try the | |
1605 | source directory. */ | |
1606 | if (data_dir == 0) | |
1607 | { | |
70ec1377 | 1608 | Lisp_Object tem, tem1, srcdir; |
624780f0 GM |
1609 | Lisp_Object lispdir = Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH, 0)); |
1610 | ||
1611 | srcdir = Fexpand_file_name (build_string ("../src/"), lispdir); | |
7e933683 | 1612 | |
00156f95 | 1613 | tem = Fexpand_file_name (build_string ("NEWS"), Vdata_directory); |
7e933683 | 1614 | tem1 = Ffile_exists_p (tem); |
70ec1377 | 1615 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
7e933683 | 1616 | { |
70ec1377 | 1617 | Lisp_Object newdir; |
624780f0 | 1618 | newdir = Fexpand_file_name (build_string ("../etc/"), lispdir); |
00156f95 | 1619 | tem = Fexpand_file_name (build_string ("NEWS"), newdir); |
7e933683 RS |
1620 | tem1 = Ffile_exists_p (tem); |
1621 | if (!NILP (tem1)) | |
1622 | Vdata_directory = newdir; | |
1623 | } | |
1624 | } | |
80856e74 | 1625 | |
d883eb62 RS |
1626 | #ifndef CANNOT_DUMP |
1627 | if (initialized) | |
1628 | #endif | |
1629 | { | |
1630 | tempdir = Fdirectory_file_name (Vexec_directory); | |
73dcdb9f PE |
1631 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
1632 | dir_warning ("arch-dependent data dir", Vexec_directory); | |
d883eb62 | 1633 | } |
80856e74 | 1634 | |
e576cab4 | 1635 | tempdir = Fdirectory_file_name (Vdata_directory); |
73dcdb9f PE |
1636 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
1637 | dir_warning ("arch-independent data dir", Vdata_directory); | |
e576cab4 | 1638 | |
83be8524 | 1639 | sh = getenv ("SHELL"); |
80856e74 | 1640 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
8abd035b | 1641 | |
40b49d4b JB |
1642 | #ifdef DOS_NT |
1643 | Vshared_game_score_directory = Qnil; | |
1644 | #else | |
d0065ff1 | 1645 | Vshared_game_score_directory = build_unibyte_string (PATH_GAME); |
73dcdb9f | 1646 | if (NILP (Ffile_accessible_directory_p (Vshared_game_score_directory))) |
63789758 | 1647 | Vshared_game_score_directory = Qnil; |
40b49d4b | 1648 | #endif |
9fefd2ba JB |
1649 | } |
1650 | ||
dfcf069d | 1651 | void |
971de7fb | 1652 | set_initial_environment (void) |
9fefd2ba | 1653 | { |
738db178 DN |
1654 | char **envp; |
1655 | for (envp = environ; *envp; envp++) | |
1656 | Vprocess_environment = Fcons (build_string (*envp), | |
1657 | Vprocess_environment); | |
1658 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent | |
1659 | to use `delete' and friends on process-environment. */ | |
1660 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); | |
80856e74 JB |
1661 | } |
1662 | ||
dfcf069d | 1663 | void |
971de7fb | 1664 | syms_of_callproc (void) |
80856e74 | 1665 | { |
172a66a1 BT |
1666 | #include "callproc.x" |
1667 | ||
f92d51d8 CY |
1668 | #ifndef DOS_NT |
1669 | Vtemp_file_name_pattern = build_string ("emacsXXXXXX"); | |
bf6b4923 | 1670 | #else /* DOS_NT */ |
f92d51d8 | 1671 | Vtemp_file_name_pattern = build_string ("emXXXXXX"); |
f92d51d8 CY |
1672 | #endif |
1673 | staticpro (&Vtemp_file_name_pattern); | |
1674 | ||
94fcd171 PE |
1675 | #ifdef MSDOS |
1676 | synch_process_tempfile = make_number (0); | |
1677 | staticpro (&synch_process_tempfile); | |
1678 | #endif | |
1679 | ||
29208e82 | 1680 | DEFVAR_LISP ("shell-file-name", Vshell_file_name, |
fb7ada5f | 1681 | doc: /* File name to load inferior shells from. |
b20b29be EZ |
1682 | Initialized from the SHELL environment variable, or to a system-dependent |
1683 | default if SHELL is not set. */); | |
80856e74 | 1684 | |
29208e82 | 1685 | DEFVAR_LISP ("exec-path", Vexec_path, |
fb7ada5f | 1686 | doc: /* List of directories to search programs to run in subprocesses. |
fdadeb49 JC |
1687 | Each element is a string (directory name) or nil (try default directory). |
1688 | ||
1689 | By default the last element of this list is `exec-directory'. The | |
1690 | last element is not always used, for example in shell completion | |
1691 | (`shell-dynamic-complete-command'). */); | |
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 | } |