Commit | Line | Data |
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80856e74 | 1 | /* Synchronous subprocess invocation for GNU Emacs. |
908589fd | 2 | Copyright (C) 1985-1988, 1993-1995, 1999-2013 |
19ed11ba | 3 | Free Software Foundation, Inc. |
80856e74 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
80856e74 | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
80856e74 JB |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
80856e74 JB |
19 | |
20 | ||
68c45bf0 | 21 | #include <config.h> |
e576cab4 | 22 | #include <errno.h> |
565620a5 | 23 | #include <stdio.h> |
80856e74 | 24 | #include <sys/types.h> |
3cbd6585 | 25 | #include <unistd.h> |
3cbd6585 | 26 | |
80856e74 | 27 | #include <sys/file.h> |
80856e74 | 28 | #include <fcntl.h> |
80856e74 | 29 | |
0898ca10 JB |
30 | #include "lisp.h" |
31 | ||
bad95d8f RS |
32 | #ifdef WINDOWSNT |
33 | #define NOMINMAX | |
1d442672 | 34 | #include <sys/socket.h> /* for fcntl */ |
bad95d8f | 35 | #include <windows.h> |
489f9371 | 36 | #include "w32.h" |
bad95d8f RS |
37 | #define _P_NOWAIT 1 /* from process.h */ |
38 | #endif | |
39 | ||
7e6c2178 | 40 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
7e6c2178 RS |
41 | #include <sys/stat.h> |
42 | #include <sys/param.h> | |
7e6c2178 RS |
43 | #endif /* MSDOS */ |
44 | ||
80856e74 | 45 | #include "commands.h" |
91183bfd | 46 | #include "character.h" |
e5560ff7 | 47 | #include "buffer.h" |
edf496dd | 48 | #include "ccl.h" |
32d08644 | 49 | #include "coding.h" |
f0b950cf | 50 | #include "composite.h" |
57bda87a | 51 | #include <epaths.h> |
80856e74 | 52 | #include "process.h" |
d177f194 | 53 | #include "syssignal.h" |
a129418f | 54 | #include "systty.h" |
afea8a8a | 55 | #include "syswait.h" |
aba637ec | 56 | #include "blockinput.h" |
f105f403 KL |
57 | #include "frame.h" |
58 | #include "termhooks.h" | |
80856e74 | 59 | |
5f027cea EZ |
60 | #ifdef MSDOS |
61 | #include "msdos.h" | |
62 | #endif | |
63 | ||
d01ba2f1 GM |
64 | #ifdef HAVE_NS |
65 | #include "nsterm.h" | |
66 | #endif | |
67 | ||
f92d51d8 CY |
68 | /* Pattern used by call-process-region to make temp files. */ |
69 | static Lisp_Object Vtemp_file_name_pattern; | |
70 | ||
94fcd171 PE |
71 | /* The next two variables are used while record-unwind-protect is in place |
72 | during call-process for a subprocess for which record_deleted_pid has | |
73 | not yet been called. At other times, synch_process_pid is zero and | |
74 | synch_process_tempfile's contents are irrelevant. Doing this via static | |
bb5f74ee PE |
75 | C variables is more convenient than putting them into the arguments |
76 | of record-unwind-protect, as they need to be updated at randomish | |
77 | times in the code, and Lisp cannot always store these values as | |
78 | Emacs integers. It's safe to use static variables here, as the | |
79 | code is never invoked reentrantly. */ | |
80 | ||
81 | /* If nonzero, a process-ID that has not been reaped. */ | |
82 | static pid_t synch_process_pid; | |
83 | ||
94fcd171 PE |
84 | /* If a string, the name of a temp file that has not been removed. */ |
85 | #ifdef MSDOS | |
86 | static Lisp_Object synch_process_tempfile; | |
87 | #else | |
88 | # define synch_process_tempfile make_number (0) | |
89 | #endif | |
90 | ||
91 | /* Indexes of file descriptors that need closing on call_process_kill. */ | |
92 | enum | |
93 | { | |
94 | /* The subsidiary process's stdout and stderr. stdin is handled | |
95 | separately, in either Fcall_process_region or create_temp_file. */ | |
96 | CALLPROC_STDOUT, CALLPROC_STDERR, | |
97 | ||
98 | /* How to read from a pipe (or substitute) from the subsidiary process. */ | |
99 | CALLPROC_PIPEREAD, | |
100 | ||
101 | /* A bound on the number of file descriptors. */ | |
102 | CALLPROC_FDS | |
103 | }; | |
104 | ||
105 | static Lisp_Object call_process (ptrdiff_t, Lisp_Object *, int); | |
bb5f74ee PE |
106 | \f |
107 | /* Block SIGCHLD. */ | |
80856e74 | 108 | |
c7041908 | 109 | void |
bb5f74ee PE |
110 | block_child_signal (void) |
111 | { | |
bb5f74ee PE |
112 | sigset_t blocked; |
113 | sigemptyset (&blocked); | |
114 | sigaddset (&blocked, SIGCHLD); | |
115 | pthread_sigmask (SIG_BLOCK, &blocked, 0); | |
bb5f74ee | 116 | } |
6b61353c | 117 | |
bb5f74ee | 118 | /* Unblock SIGCHLD. */ |
f105f403 | 119 | |
c7041908 | 120 | void |
bb5f74ee PE |
121 | unblock_child_signal (void) |
122 | { | |
bb5f74ee | 123 | pthread_sigmask (SIG_SETMASK, &empty_mask, 0); |
bb5f74ee | 124 | } |
37d54121 | 125 | |
35fb8050 PE |
126 | /* If P is reapable, record it as a deleted process and kill it. |
127 | Do this in a critical section. Unless PID is wedged it will be | |
128 | reaped on receipt of the first SIGCHLD after the critical section. */ | |
129 | ||
130 | void | |
94fcd171 | 131 | record_kill_process (struct Lisp_Process *p, Lisp_Object tempfile) |
35fb8050 PE |
132 | { |
133 | block_child_signal (); | |
134 | ||
135 | if (p->alive) | |
136 | { | |
94fcd171 | 137 | record_deleted_pid (p->pid, tempfile); |
35fb8050 | 138 | p->alive = 0; |
d983a10b | 139 | kill (- p->pid, SIGKILL); |
35fb8050 PE |
140 | } |
141 | ||
142 | unblock_child_signal (); | |
143 | } | |
144 | ||
94fcd171 PE |
145 | /* Clean up files, file descriptors and processes created by Fcall_process. */ |
146 | ||
147 | static void | |
148 | delete_temp_file (Lisp_Object name) | |
149 | { | |
150 | unlink (SSDATA (name)); | |
151 | } | |
37d54121 | 152 | |
27e498e6 | 153 | static void |
94fcd171 | 154 | call_process_kill (void *ptr) |
d177f194 | 155 | { |
94fcd171 PE |
156 | int *callproc_fd = ptr; |
157 | int i; | |
158 | for (i = 0; i < CALLPROC_FDS; i++) | |
159 | if (0 <= callproc_fd[i]) | |
160 | emacs_close (callproc_fd[i]); | |
bb5f74ee | 161 | |
bb5f74ee PE |
162 | if (synch_process_pid) |
163 | { | |
35fb8050 PE |
164 | struct Lisp_Process proc; |
165 | proc.alive = 1; | |
166 | proc.pid = synch_process_pid; | |
94fcd171 PE |
167 | record_kill_process (&proc, synch_process_tempfile); |
168 | synch_process_pid = 0; | |
bb5f74ee | 169 | } |
94fcd171 PE |
170 | else if (STRINGP (synch_process_tempfile)) |
171 | delete_temp_file (synch_process_tempfile); | |
d177f194 JB |
172 | } |
173 | ||
94fcd171 PE |
174 | /* Clean up when exiting Fcall_process: restore the buffer, and |
175 | kill the subsidiary process group if the process still exists. */ | |
bb5f74ee | 176 | |
27e498e6 | 177 | static void |
94fcd171 | 178 | call_process_cleanup (Lisp_Object buffer) |
80856e74 | 179 | { |
bb5f74ee | 180 | Fset_buffer (buffer); |
d177f194 | 181 | |
bb5f74ee | 182 | if (synch_process_pid) |
d177f194 | 183 | { |
d983a10b | 184 | kill (-synch_process_pid, SIGINT); |
d177f194 JB |
185 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); |
186 | immediate_quit = 1; | |
187 | QUIT; | |
bb5f74ee PE |
188 | wait_for_termination (synch_process_pid, 0, 1); |
189 | synch_process_pid = 0; | |
d177f194 | 190 | immediate_quit = 0; |
d177f194 JB |
191 | message1 ("Waiting for process to die...done"); |
192 | } | |
80856e74 JB |
193 | } |
194 | ||
406af475 PE |
195 | #ifdef DOS_NT |
196 | static mode_t const default_output_mode = S_IREAD | S_IWRITE; | |
197 | #else | |
198 | static mode_t const default_output_mode = 0666; | |
199 | #endif | |
200 | ||
a7ca3326 | 201 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, |
fdb82f93 PJ |
202 | doc: /* Call PROGRAM synchronously in separate process. |
203 | The remaining arguments are optional. | |
204 | The program's input comes from file INFILE (nil means `/dev/null'). | |
38cd43eb | 205 | Insert output in DESTINATION before point; t means current buffer; nil for DESTINATION |
1ef14cb4 | 206 | means discard it; 0 means discard and don't wait; and `(:file FILE)', where |
1b9f60cc GM |
207 | FILE is a file name string, means that it should be written to that file |
208 | \(if the file already exists it is overwritten). | |
38cd43eb | 209 | DESTINATION can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
fdb82f93 PJ |
210 | REAL-BUFFER says what to do with standard output, as above, |
211 | while STDERR-FILE says what to do with standard error in the child. | |
212 | STDERR-FILE may be nil (discard standard error output), | |
213 | t (mix it with ordinary output), or a file name string. | |
214 | ||
215 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
216 | Remaining arguments are strings passed as command arguments to PROGRAM. | |
217 | ||
a4feb144 RS |
218 | If executable PROGRAM can't be found as an executable, `call-process' |
219 | signals a Lisp error. `call-process' reports errors in execution of | |
220 | the program only through its return and output. | |
221 | ||
38cd43eb | 222 | If DESTINATION is 0, `call-process' returns immediately with value nil. |
fdb82f93 PJ |
223 | Otherwise it waits for PROGRAM to terminate |
224 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
225 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
226 | ||
38cd43eb | 227 | usage: (call-process PROGRAM &optional INFILE DESTINATION DISPLAY &rest ARGS) */) |
f66c7cf8 | 228 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 229 | { |
94fcd171 PE |
230 | Lisp_Object infile, encoded_infile; |
231 | int filefd; | |
232 | struct gcpro gcpro1; | |
233 | ptrdiff_t count = SPECPDL_INDEX (); | |
234 | ||
235 | if (nargs >= 2 && ! NILP (args[1])) | |
236 | { | |
237 | infile = Fexpand_file_name (args[1], BVAR (current_buffer, directory)); | |
238 | CHECK_STRING (infile); | |
239 | } | |
240 | else | |
241 | infile = build_string (NULL_DEVICE); | |
242 | ||
243 | GCPRO1 (infile); | |
244 | encoded_infile = STRING_MULTIBYTE (infile) ? ENCODE_FILE (infile) : infile; | |
245 | ||
246 | filefd = emacs_open (SSDATA (encoded_infile), O_RDONLY, 0); | |
247 | if (filefd < 0) | |
248 | report_file_error ("Opening process input file", infile); | |
249 | record_unwind_protect_int (close_file_unwind, filefd); | |
250 | UNGCPRO; | |
251 | return unbind_to (count, call_process (nargs, args, filefd)); | |
252 | } | |
253 | ||
254 | /* Like Fcall_process (NARGS, ARGS), except use FILEFD as the input file. | |
255 | At entry, the specpdl stack top entry must be close_file_unwind (FILEFD). */ | |
256 | ||
257 | static Lisp_Object | |
258 | call_process (ptrdiff_t nargs, Lisp_Object *args, int filefd) | |
259 | { | |
260 | Lisp_Object buffer, current_dir, path; | |
2f221583 | 261 | bool display_p; |
94fcd171 PE |
262 | int fd0; |
263 | int callproc_fd[CALLPROC_FDS]; | |
bb5f74ee | 264 | int status; |
94fcd171 | 265 | ptrdiff_t i; |
d311d28c PE |
266 | ptrdiff_t count = SPECPDL_INDEX (); |
267 | USE_SAFE_ALLOCA; | |
2d607244 | 268 | |
60aeceb8 | 269 | char **new_argv; |
39eaa782 RS |
270 | /* File to use for stderr in the child. |
271 | t means use same as standard output. */ | |
272 | Lisp_Object error_file; | |
1ef14cb4 | 273 | Lisp_Object output_file = Qnil; |
7e6c2178 | 274 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
94fcd171 | 275 | char *tempfile = NULL; |
d311d28c PE |
276 | int pid; |
277 | #else | |
278 | pid_t pid; | |
80856e74 | 279 | #endif |
bb5f74ee | 280 | int child_errno; |
94fcd171 | 281 | int fd_output, fd_error; |
32d08644 KH |
282 | struct coding_system process_coding; /* coding-system of process output */ |
283 | struct coding_system argument_coding; /* coding-system of arguments */ | |
09494912 RS |
284 | /* Set to the return value of Ffind_operation_coding_system. */ |
285 | Lisp_Object coding_systems; | |
94fcd171 PE |
286 | bool discard_output; |
287 | ||
288 | if (synch_process_pid) | |
289 | error ("call-process invoked recursively"); | |
09494912 RS |
290 | |
291 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ | |
292 | coding_systems = Qt; | |
32d08644 | 293 | |
b7826503 | 294 | CHECK_STRING (args[0]); |
80856e74 | 295 | |
39eaa782 RS |
296 | error_file = Qt; |
297 | ||
7e6c2178 RS |
298 | #ifndef subprocesses |
299 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
177c0ea7 | 300 | if (nargs >= 3 |
09ffb8b5 | 301 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
302 | error ("Operating system cannot handle asynchronous subprocesses"); |
303 | #endif /* subprocesses */ | |
304 | ||
09494912 | 305 | /* Decide the coding-system for giving arguments. */ |
32d08644 KH |
306 | { |
307 | Lisp_Object val, *args2; | |
32d08644 KH |
308 | |
309 | /* If arguments are supplied, we may have to encode them. */ | |
310 | if (nargs >= 5) | |
311 | { | |
2f221583 | 312 | bool must_encode = 0; |
6e50da0a | 313 | Lisp_Object coding_attrs; |
30d57b8e | 314 | |
e7c1c20e | 315 | for (i = 4; i < nargs; i++) |
b7826503 | 316 | CHECK_STRING (args[i]); |
e7c1c20e | 317 | |
a2286b5c | 318 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
319 | if (STRING_MULTIBYTE (args[i])) |
320 | must_encode = 1; | |
321 | ||
beacaab3 KH |
322 | if (!NILP (Vcoding_system_for_write)) |
323 | val = Vcoding_system_for_write; | |
30d57b8e | 324 | else if (! must_encode) |
fcaf8878 | 325 | val = Qraw_text; |
beacaab3 | 326 | else |
32d08644 | 327 | { |
0065d054 | 328 | SAFE_NALLOCA (args2, 1, nargs + 1); |
32d08644 KH |
329 | args2[0] = Qcall_process; |
330 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 331 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 332 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
32d08644 | 333 | } |
fcaf8878 | 334 | val = complement_process_encoding_system (val); |
32d08644 | 335 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); |
6e50da0a KH |
336 | coding_attrs = CODING_ID_ATTRS (argument_coding.id); |
337 | if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs))) | |
338 | { | |
339 | /* We should not use an ASCII incompatible coding system. */ | |
340 | val = raw_text_coding_system (val); | |
341 | setup_coding_system (val, &argument_coding); | |
342 | } | |
32d08644 | 343 | } |
32d08644 KH |
344 | } |
345 | ||
94fcd171 PE |
346 | if (nargs < 3) |
347 | buffer = Qnil; | |
80856e74 | 348 | else |
e576cab4 | 349 | { |
39eaa782 RS |
350 | buffer = args[2]; |
351 | ||
1ef14cb4 LMI |
352 | /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT |
353 | FILE-FOR-STDERR), unless the first element is :file, in which case see | |
354 | the next paragraph. */ | |
94fcd171 | 355 | if (CONSP (buffer) && !EQ (XCAR (buffer), QCfile)) |
39eaa782 | 356 | { |
70949dac | 357 | if (CONSP (XCDR (buffer))) |
45be8a1e | 358 | { |
a9d4f28a | 359 | Lisp_Object stderr_file; |
70949dac | 360 | stderr_file = XCAR (XCDR (buffer)); |
45be8a1e RS |
361 | |
362 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
363 | error_file = stderr_file; | |
364 | else | |
365 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
366 | } | |
367 | ||
70949dac | 368 | buffer = XCAR (buffer); |
39eaa782 | 369 | } |
044512ed | 370 | |
1ef14cb4 | 371 | /* If the buffer is (still) a list, it might be a (:file "file") spec. */ |
94fcd171 | 372 | if (CONSP (buffer) && EQ (XCAR (buffer), QCfile)) |
1ef14cb4 LMI |
373 | { |
374 | output_file = Fexpand_file_name (XCAR (XCDR (buffer)), | |
375 | BVAR (current_buffer, directory)); | |
376 | CHECK_STRING (output_file); | |
377 | buffer = Qnil; | |
378 | } | |
379 | ||
94fcd171 | 380 | if (! (NILP (buffer) || EQ (buffer, Qt) || INTEGERP (buffer))) |
e576cab4 | 381 | { |
39eaa782 RS |
382 | Lisp_Object spec_buffer; |
383 | spec_buffer = buffer; | |
50fe359b | 384 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
385 | /* Mention the buffer name for a better error message. */ |
386 | if (NILP (buffer)) | |
b7826503 PJ |
387 | CHECK_BUFFER (spec_buffer); |
388 | CHECK_BUFFER (buffer); | |
e576cab4 JB |
389 | } |
390 | } | |
80856e74 | 391 | |
58616e67 JB |
392 | /* Make sure that the child will be able to chdir to the current |
393 | buffer's current directory, or its unhandled equivalent. We | |
394 | can't just have the child check for an error when it does the | |
395 | chdir, since it's in a vfork. | |
396 | ||
397 | We have to GCPRO around this because Fexpand_file_name, | |
398 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
399 | might call a file name handling function. The argument list is | |
400 | protected by the caller, so all we really have to worry about is | |
401 | buffer. */ | |
402 | { | |
94fcd171 | 403 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
58616e67 | 404 | |
4b4deea2 | 405 | current_dir = BVAR (current_buffer, directory); |
58616e67 | 406 | |
94fcd171 | 407 | GCPRO4 (buffer, current_dir, error_file, output_file); |
58616e67 | 408 | |
ca319910 SM |
409 | current_dir = Funhandled_file_name_directory (current_dir); |
410 | if (NILP (current_dir)) | |
411 | /* If the file name handler says that current_dir is unreachable, use | |
412 | a sensible default. */ | |
413 | current_dir = build_string ("~/"); | |
414 | current_dir = expand_and_dir_to_file (current_dir, Qnil); | |
db8454b0 CY |
415 | current_dir = Ffile_name_as_directory (current_dir); |
416 | ||
58616e67 JB |
417 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
418 | report_file_error ("Setting current directory", | |
a9757f6a | 419 | BVAR (current_buffer, directory)); |
58616e67 | 420 | |
34b87689 KH |
421 | if (STRING_MULTIBYTE (current_dir)) |
422 | current_dir = ENCODE_FILE (current_dir); | |
423 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) | |
424 | error_file = ENCODE_FILE (error_file); | |
1ef14cb4 LMI |
425 | if (STRINGP (output_file) && STRING_MULTIBYTE (output_file)) |
426 | output_file = ENCODE_FILE (output_file); | |
58616e67 JB |
427 | UNGCPRO; |
428 | } | |
429 | ||
d311d28c | 430 | display_p = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
80856e74 | 431 | |
94fcd171 PE |
432 | for (i = 0; i < CALLPROC_FDS; i++) |
433 | callproc_fd[i] = -1; | |
434 | #ifdef MSDOS | |
435 | synch_process_tempfile = make_number (0); | |
436 | #endif | |
437 | record_unwind_protect_ptr (call_process_kill, callproc_fd); | |
1ef14cb4 | 438 | |
80856e74 | 439 | /* Search for program; barf if not found. */ |
c52b0b34 | 440 | { |
94fcd171 | 441 | struct gcpro gcpro1, gcpro2, gcpro3; |
a773ed9a | 442 | int ok; |
c52b0b34 | 443 | |
94fcd171 | 444 | GCPRO3 (buffer, current_dir, error_file); |
a773ed9a | 445 | ok = openp (Vexec_path, args[0], Vexec_suffixes, &path, make_number (X_OK)); |
c52b0b34 | 446 | UNGCPRO; |
a773ed9a | 447 | if (ok < 0) |
94fcd171 | 448 | report_file_error ("Searching for program", args[0]); |
c52b0b34 | 449 | } |
8ee8f447 RS |
450 | |
451 | /* If program file name starts with /: for quoting a magic name, | |
452 | discard that. */ | |
453 | if (SBYTES (path) > 2 && SREF (path, 0) == '/' | |
454 | && SREF (path, 1) == ':') | |
455 | path = Fsubstring (path, make_number (2), Qnil); | |
456 | ||
98c6f1e3 | 457 | new_argv = SAFE_ALLOCA ((nargs > 4 ? nargs - 2 : 2) * sizeof *new_argv); |
c364e618 | 458 | |
e7c3fb06 | 459 | { |
94fcd171 | 460 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
e7c3fb06 | 461 | |
94fcd171 | 462 | GCPRO4 (buffer, current_dir, path, error_file); |
e7c3fb06 EZ |
463 | if (nargs > 4) |
464 | { | |
465 | ptrdiff_t i; | |
466 | ||
467 | argument_coding.dst_multibyte = 0; | |
468 | for (i = 4; i < nargs; i++) | |
469 | { | |
470 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); | |
471 | if (CODING_REQUIRE_ENCODING (&argument_coding)) | |
472 | /* We must encode this argument. */ | |
473 | args[i] = encode_coding_string (&argument_coding, args[i], 1); | |
474 | } | |
475 | for (i = 4; i < nargs; i++) | |
94fbc901 | 476 | new_argv[i - 3] = SSDATA (args[i]); |
e7c3fb06 EZ |
477 | new_argv[i - 3] = 0; |
478 | } | |
479 | else | |
480 | new_argv[1] = 0; | |
481 | if (STRING_MULTIBYTE (path)) | |
482 | path = ENCODE_FILE (path); | |
94fbc901 | 483 | new_argv[0] = SSDATA (path); |
e7c3fb06 EZ |
484 | UNGCPRO; |
485 | } | |
80856e74 | 486 | |
94fcd171 | 487 | discard_output = INTEGERP (buffer) || (NILP (buffer) && NILP (output_file)); |
7e6c2178 | 488 | |
94fcd171 PE |
489 | #ifdef MSDOS |
490 | if (! discard_output && ! STRINGP (output_file)) | |
7e6c2178 | 491 | { |
94fcd171 PE |
492 | char const *tmpdir = egetenv ("TMPDIR"); |
493 | char const *outf = tmpdir ? tmpdir : ""; | |
494 | tempfile = alloca (strlen (outf) + 20); | |
495 | strcpy (tempfile, outf); | |
e7ac588e | 496 | dostounix_filename (tempfile, 0); |
888c9e86 EZ |
497 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') |
498 | strcat (tempfile, "/"); | |
499 | strcat (tempfile, "detmp.XXX"); | |
500 | mktemp (tempfile); | |
94fcd171 PE |
501 | if (!*tempfile) |
502 | report_file_error ("Opening process output file", Qnil); | |
503 | output_file = build_string (tempfile); | |
504 | synch_process_tempfile = output_file; | |
505 | } | |
506 | #endif | |
507 | ||
508 | if (discard_output) | |
509 | { | |
510 | fd_output = emacs_open (NULL_DEVICE, O_WRONLY, 0); | |
511 | if (fd_output < 0) | |
512 | report_file_error ("Opening null device", Qnil); | |
513 | } | |
514 | else if (STRINGP (output_file)) | |
515 | { | |
516 | fd_output = emacs_open (SSDATA (output_file), | |
517 | O_WRONLY | O_CREAT | O_TRUNC | O_TEXT, | |
518 | default_output_mode); | |
519 | if (fd_output < 0) | |
a773ed9a PE |
520 | { |
521 | int open_errno = errno; | |
94fcd171 | 522 | output_file = DECODE_FILE (output_file); |
a773ed9a | 523 | report_file_errno ("Opening process output file", |
94fcd171 | 524 | output_file, open_errno); |
a773ed9a | 525 | } |
7e6c2178 | 526 | } |
80856e74 JB |
527 | else |
528 | { | |
60aeceb8 | 529 | int fd[2]; |
c7ddc792 | 530 | if (emacs_pipe (fd) != 0) |
94fcd171 PE |
531 | report_file_error ("Creating process pipe", Qnil); |
532 | callproc_fd[CALLPROC_PIPEREAD] = fd[0]; | |
533 | fd_output = fd[1]; | |
80856e74 | 534 | } |
94fcd171 | 535 | callproc_fd[CALLPROC_STDOUT] = fd_output; |
80856e74 | 536 | |
94fcd171 | 537 | fd_error = fd_output; |
80856e74 | 538 | |
94fcd171 PE |
539 | if (STRINGP (error_file) || (NILP (error_file) && !discard_output)) |
540 | { | |
541 | fd_error = emacs_open ((STRINGP (error_file) | |
542 | ? SSDATA (error_file) | |
543 | : NULL_DEVICE), | |
406af475 PE |
544 | O_WRONLY | O_CREAT | O_TRUNC | O_TEXT, |
545 | default_output_mode); | |
94fcd171 PE |
546 | if (fd_error < 0) |
547 | { | |
548 | int open_errno = errno; | |
549 | report_file_errno ("Cannot redirect stderr", | |
550 | (STRINGP (error_file) | |
551 | ? DECODE_FILE (error_file) | |
552 | : build_string (NULL_DEVICE)), | |
553 | open_errno); | |
554 | } | |
555 | callproc_fd[CALLPROC_STDERR] = fd_error; | |
556 | } | |
89e1ec1d | 557 | |
2610078a | 558 | #ifdef MSDOS /* MW, July 1993 */ |
94fcd171 PE |
559 | /* Note that on MSDOS `child_setup' actually returns the child process |
560 | exit status, not its PID, so assign it to status below. */ | |
561 | pid = child_setup (filefd, fd_output, fd_error, new_argv, 0, current_dir); | |
562 | ||
563 | if (pid < 0) | |
564 | { | |
565 | child_errno = errno; | |
566 | unbind_to (count, Qnil); | |
567 | synchronize_system_messages_locale (); | |
568 | return | |
569 | code_convert_string_norecord (build_string (strerror (child_errno)), | |
570 | Vlocale_coding_system, 0); | |
571 | } | |
572 | status = pid; | |
573 | ||
574 | for (i = 0; i < CALLPROC_FDS; i++) | |
575 | if (0 <= callproc_fd[i]) | |
2610078a | 576 | { |
94fcd171 PE |
577 | emacs_close (callproc_fd[i]); |
578 | callproc_fd[i] = -1; | |
2610078a | 579 | } |
94fcd171 PE |
580 | emacs_close (filefd); |
581 | clear_unwind_protect (count - 1); | |
582 | ||
583 | if (tempfile) | |
584 | { | |
585 | /* Since CRLF is converted to LF within `decode_coding', we | |
586 | can always open a file with binary mode. */ | |
587 | callproc_fd[CALLPROC_PIPEREAD] = emacs_open (tempfile, | |
588 | O_RDONLY | O_BINARY, 0); | |
589 | if (callproc_fd[CALLPROC_PIPEREAD] < 0) | |
590 | { | |
591 | int open_errno = errno; | |
592 | report_file_errno ("Cannot re-open temporary file", | |
593 | build_string (tempfile), open_errno); | |
594 | } | |
595 | } | |
596 | ||
644d3f0d | 597 | #endif /* MSDOS */ |
bb5f74ee | 598 | |
94fcd171 PE |
599 | /* Do the unwind-protect now, even though the pid is not known, so |
600 | that no storage allocation is done in the critical section. | |
601 | The actual PID will be filled in during the critical section. */ | |
602 | record_unwind_protect (call_process_cleanup, Fcurrent_buffer ()); | |
644d3f0d | 603 | |
94fcd171 | 604 | #ifndef MSDOS |
bb5f74ee | 605 | |
94fcd171 PE |
606 | block_input (); |
607 | block_child_signal (); | |
bb5f74ee | 608 | |
bad95d8f | 609 | #ifdef WINDOWSNT |
94fcd171 | 610 | pid = child_setup (filefd, fd_output, fd_error, new_argv, 0, current_dir); |
bad95d8f | 611 | #else /* not WINDOWSNT */ |
c0ad4ea5 | 612 | |
94fcd171 PE |
613 | /* vfork, and prevent local vars from being clobbered by the vfork. */ |
614 | { | |
615 | Lisp_Object volatile buffer_volatile = buffer; | |
616 | Lisp_Object volatile coding_systems_volatile = coding_systems; | |
617 | Lisp_Object volatile current_dir_volatile = current_dir; | |
618 | bool volatile display_p_volatile = display_p; | |
619 | bool volatile sa_must_free_volatile = sa_must_free; | |
620 | int volatile fd_error_volatile = fd_error; | |
621 | int volatile filefd_volatile = filefd; | |
622 | ptrdiff_t volatile count_volatile = count; | |
623 | ptrdiff_t volatile sa_count_volatile = sa_count; | |
624 | char **volatile new_argv_volatile = new_argv; | |
625 | int volatile callproc_fd_volatile[CALLPROC_FDS]; | |
626 | for (i = 0; i < CALLPROC_FDS; i++) | |
627 | callproc_fd_volatile[i] = callproc_fd[i]; | |
628 | ||
629 | pid = vfork (); | |
630 | ||
631 | buffer = buffer_volatile; | |
632 | coding_systems = coding_systems_volatile; | |
633 | current_dir = current_dir_volatile; | |
634 | display_p = display_p_volatile; | |
635 | sa_must_free = sa_must_free_volatile; | |
636 | fd_error = fd_error_volatile; | |
637 | filefd = filefd_volatile; | |
638 | count = count_volatile; | |
639 | sa_count = sa_count_volatile; | |
640 | new_argv = new_argv_volatile; | |
641 | ||
642 | for (i = 0; i < CALLPROC_FDS; i++) | |
643 | callproc_fd[i] = callproc_fd_volatile[i]; | |
644 | fd_output = callproc_fd[CALLPROC_STDOUT]; | |
645 | } | |
bb5f74ee | 646 | |
94fcd171 PE |
647 | if (pid == 0) |
648 | { | |
649 | unblock_child_signal (); | |
322aea6d | 650 | |
94fcd171 | 651 | setsid (); |
c0ad4ea5 | 652 | |
94fcd171 PE |
653 | /* Emacs ignores SIGPIPE, but the child should not. */ |
654 | signal (SIGPIPE, SIG_DFL); | |
c0ad4ea5 | 655 | |
94fcd171 PE |
656 | child_setup (filefd, fd_output, fd_error, new_argv, 0, current_dir); |
657 | } | |
aba637ec | 658 | |
bad95d8f | 659 | #endif /* not WINDOWSNT */ |
cd5f8f60 | 660 | |
94fcd171 | 661 | child_errno = errno; |
bb5f74ee | 662 | |
94fcd171 PE |
663 | if (pid > 0) |
664 | synch_process_pid = pid; | |
bb5f74ee | 665 | |
94fcd171 PE |
666 | unblock_child_signal (); |
667 | unblock_input (); | |
bb5f74ee | 668 | |
2610078a | 669 | #endif /* not MSDOS */ |
80856e74 | 670 | |
80856e74 | 671 | if (pid < 0) |
a773ed9a | 672 | report_file_errno ("Doing vfork", Qnil, child_errno); |
80856e74 | 673 | |
94fcd171 PE |
674 | /* Close our file descriptors, except for callproc_fd[CALLPROC_PIPEREAD] |
675 | since we will use that to read input from. */ | |
676 | for (i = 0; i < CALLPROC_FDS; i++) | |
677 | if (i != CALLPROC_PIPEREAD && 0 <= callproc_fd[i]) | |
678 | { | |
679 | emacs_close (callproc_fd[i]); | |
680 | callproc_fd[i] = -1; | |
681 | } | |
682 | emacs_close (filefd); | |
683 | clear_unwind_protect (count - 1); | |
684 | ||
d50d3dc8 | 685 | if (INTEGERP (buffer)) |
644d3f0d | 686 | return unbind_to (count, Qnil); |
80856e74 | 687 | |
d50d3dc8 | 688 | if (BUFFERP (buffer)) |
80856e74 JB |
689 | Fset_buffer (buffer); |
690 | ||
94fcd171 PE |
691 | fd0 = callproc_fd[CALLPROC_PIPEREAD]; |
692 | ||
693 | if (0 <= fd0) | |
09494912 RS |
694 | { |
695 | Lisp_Object val, *args2; | |
696 | ||
697 | val = Qnil; | |
698 | if (!NILP (Vcoding_system_for_read)) | |
699 | val = Vcoding_system_for_read; | |
700 | else | |
701 | { | |
702 | if (EQ (coding_systems, Qt)) | |
703 | { | |
f66c7cf8 | 704 | ptrdiff_t i; |
09494912 | 705 | |
0065d054 | 706 | SAFE_NALLOCA (args2, 1, nargs + 1); |
09494912 RS |
707 | args2[0] = Qcall_process; |
708 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
709 | coding_systems | |
710 | = Ffind_operation_coding_system (nargs + 1, args2); | |
711 | } | |
712 | if (CONSP (coding_systems)) | |
70949dac | 713 | val = XCAR (coding_systems); |
09494912 | 714 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 715 | val = XCAR (Vdefault_process_coding_system); |
09494912 RS |
716 | else |
717 | val = Qnil; | |
718 | } | |
91183bfd | 719 | Fcheck_coding_system (val); |
09494912 RS |
720 | /* In unibyte mode, character code conversion should not take |
721 | place but EOL conversion should. So, setup raw-text or one | |
722 | of the subsidiary according to the information just setup. */ | |
4b4deea2 | 723 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
09494912 | 724 | && !NILP (val)) |
91183bfd KH |
725 | val = raw_text_coding_system (val); |
726 | setup_coding_system (val, &process_coding); | |
659afede KH |
727 | process_coding.dst_multibyte |
728 | = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); | |
94fcd171 | 729 | process_coding.src_multibyte = 0; |
09494912 RS |
730 | } |
731 | ||
80856e74 JB |
732 | immediate_quit = 1; |
733 | QUIT; | |
734 | ||
94fcd171 | 735 | if (0 <= fd0) |
19ed11ba | 736 | { |
60aeceb8 PE |
737 | enum { CALLPROC_BUFFER_SIZE_MIN = 16 * 1024 }; |
738 | enum { CALLPROC_BUFFER_SIZE_MAX = 4 * CALLPROC_BUFFER_SIZE_MIN }; | |
739 | char buf[CALLPROC_BUFFER_SIZE_MAX]; | |
740 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; | |
2f221583 PE |
741 | int nread; |
742 | bool first = 1; | |
19ed11ba AS |
743 | EMACS_INT total_read = 0; |
744 | int carryover = 0; | |
2f221583 | 745 | bool display_on_the_fly = display_p; |
94fcd171 | 746 | struct coding_system saved_coding = process_coding; |
19ed11ba | 747 | |
19ed11ba AS |
748 | while (1) |
749 | { | |
750 | /* Repeatedly read until we've filled as much as possible | |
751 | of the buffer size we have. But don't read | |
752 | less than 1024--save that for the next bufferful. */ | |
753 | nread = carryover; | |
754 | while (nread < bufsize - 1024) | |
755 | { | |
60aeceb8 | 756 | int this_read = emacs_read (fd0, buf + nread, |
19ed11ba | 757 | bufsize - nread); |
60558b19 | 758 | |
19ed11ba AS |
759 | if (this_read < 0) |
760 | goto give_up; | |
60558b19 | 761 | |
19ed11ba AS |
762 | if (this_read == 0) |
763 | { | |
764 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
765 | break; | |
766 | } | |
60558b19 | 767 | |
19ed11ba AS |
768 | nread += this_read; |
769 | total_read += this_read; | |
60558b19 | 770 | |
19ed11ba AS |
771 | if (display_on_the_fly) |
772 | break; | |
773 | } | |
60558b19 | 774 | |
19ed11ba AS |
775 | /* Now NREAD is the total amount of data in the buffer. */ |
776 | immediate_quit = 0; | |
177c0ea7 | 777 | |
94fcd171 PE |
778 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
779 | && ! CODING_MAY_REQUIRE_DECODING (&process_coding)) | |
780 | insert_1_both (buf, nread, nread, 0, 1, 0); | |
781 | else | |
782 | { /* We have to decode the input. */ | |
783 | Lisp_Object curbuf; | |
784 | ptrdiff_t count1 = SPECPDL_INDEX (); | |
785 | ||
786 | XSETBUFFER (curbuf, current_buffer); | |
787 | /* We cannot allow after-change-functions be run | |
788 | during decoding, because that might modify the | |
789 | buffer, while we rely on process_coding.produced to | |
790 | faithfully reflect inserted text until we | |
791 | TEMP_SET_PT_BOTH below. */ | |
792 | specbind (Qinhibit_modification_hooks, Qt); | |
793 | decode_coding_c_string (&process_coding, | |
794 | (unsigned char *) buf, nread, curbuf); | |
795 | unbind_to (count1, Qnil); | |
796 | if (display_on_the_fly | |
797 | && CODING_REQUIRE_DETECTION (&saved_coding) | |
798 | && ! CODING_REQUIRE_DETECTION (&process_coding)) | |
799 | { | |
800 | /* We have detected some coding system, but the | |
801 | detection may have been via insufficient data. | |
802 | So give up displaying on the fly. */ | |
803 | if (process_coding.produced > 0) | |
804 | del_range_2 (process_coding.dst_pos, | |
805 | process_coding.dst_pos_byte, | |
806 | (process_coding.dst_pos | |
807 | + process_coding.produced_char), | |
808 | (process_coding.dst_pos_byte | |
809 | + process_coding.produced), | |
810 | 0); | |
811 | display_on_the_fly = 0; | |
812 | process_coding = saved_coding; | |
813 | carryover = nread; | |
814 | /* Make the above condition always fail in the future. */ | |
815 | saved_coding.common_flags | |
816 | &= ~CODING_REQUIRE_DETECTION_MASK; | |
817 | continue; | |
19ed11ba | 818 | } |
94fcd171 PE |
819 | |
820 | TEMP_SET_PT_BOTH (PT + process_coding.produced_char, | |
821 | PT_BYTE + process_coding.produced); | |
822 | carryover = process_coding.carryover_bytes; | |
823 | if (carryover > 0) | |
824 | memcpy (buf, process_coding.carryover, | |
825 | process_coding.carryover_bytes); | |
19ed11ba | 826 | } |
c5bfa12b | 827 | |
19ed11ba AS |
828 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
829 | break; | |
6e3bfbb2 | 830 | |
19ed11ba AS |
831 | /* Make the buffer bigger as we continue to read more data, |
832 | but not past CALLPROC_BUFFER_SIZE_MAX. */ | |
833 | if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) | |
834 | if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) | |
835 | bufsize = CALLPROC_BUFFER_SIZE_MAX; | |
6e3bfbb2 | 836 | |
19ed11ba AS |
837 | if (display_p) |
838 | { | |
839 | if (first) | |
840 | prepare_menu_bars (); | |
841 | first = 0; | |
842 | redisplay_preserve_echo_area (1); | |
843 | /* This variable might have been set to 0 for code | |
94fcd171 | 844 | detection. In that case, set it back to 1 because |
19ed11ba AS |
845 | we should have already detected a coding system. */ |
846 | display_on_the_fly = 1; | |
847 | } | |
848 | immediate_quit = 1; | |
849 | QUIT; | |
850 | } | |
851 | give_up: ; | |
852 | ||
853 | Vlast_coding_system_used = CODING_ID_NAME (process_coding.id); | |
854 | /* If the caller required, let the buffer inherit the | |
855 | coding-system used to decode the process output. */ | |
856 | if (inherit_process_coding_system) | |
857 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
858 | make_number (total_read)); | |
859 | } | |
3b440bb5 | 860 | |
77defa9a | 861 | #ifndef MSDOS |
80856e74 | 862 | /* Wait for it to terminate, unless it already has. */ |
94fcd171 | 863 | wait_for_termination (pid, &status, fd0 < 0); |
77defa9a | 864 | #endif |
80856e74 JB |
865 | |
866 | immediate_quit = 0; | |
867 | ||
37d54121 RS |
868 | /* Don't kill any children that the subprocess may have left behind |
869 | when exiting. */ | |
bb5f74ee | 870 | synch_process_pid = 0; |
37d54121 | 871 | |
3c59b4c9 | 872 | SAFE_FREE (); |
80856e74 JB |
873 | unbind_to (count, Qnil); |
874 | ||
bb5f74ee | 875 | if (WIFSIGNALED (status)) |
6b61353c | 876 | { |
42ca4633 | 877 | const char *signame; |
6b61353c KH |
878 | |
879 | synchronize_system_messages_locale (); | |
bb5f74ee | 880 | signame = strsignal (WTERMSIG (status)); |
6b61353c KH |
881 | |
882 | if (signame == 0) | |
19ed11ba | 883 | signame = "unknown"; |
6b61353c | 884 | |
bb5f74ee PE |
885 | return code_convert_string_norecord (build_string (signame), |
886 | Vlocale_coding_system, 0); | |
6b61353c KH |
887 | } |
888 | ||
bb5f74ee PE |
889 | eassert (WIFEXITED (status)); |
890 | return make_number (WEXITSTATUS (status)); | |
80856e74 | 891 | } |
80856e74 | 892 | \f |
bafe80ce PE |
893 | /* Create a temporary file suitable for storing the input data of |
894 | call-process-region. NARGS and ARGS are the same as for | |
94fcd171 PE |
895 | call-process-region. Store into *FILENAME_STRING_PTR a Lisp string |
896 | naming the file, and return a file descriptor for reading. | |
897 | Unwind-protect the file, so that the file descriptor will be closed | |
898 | and the file removed when the caller unwinds the specpdl stack. */ | |
fdb82f93 | 899 | |
94fcd171 PE |
900 | static int |
901 | create_temp_file (ptrdiff_t nargs, Lisp_Object *args, | |
902 | Lisp_Object *filename_string_ptr) | |
80856e74 | 903 | { |
94fcd171 | 904 | int fd; |
39323a7e KH |
905 | struct gcpro gcpro1; |
906 | Lisp_Object filename_string; | |
bafe80ce | 907 | Lisp_Object val, start, end; |
98c6f1e3 | 908 | Lisp_Object tmpdir; |
7e6c2178 | 909 | |
f92d51d8 CY |
910 | if (STRINGP (Vtemporary_file_directory)) |
911 | tmpdir = Vtemporary_file_directory; | |
7e6c2178 RS |
912 | else |
913 | { | |
83be8524 | 914 | char *outf; |
f92d51d8 | 915 | #ifndef DOS_NT |
83be8524 PE |
916 | outf = getenv ("TMPDIR"); |
917 | tmpdir = build_string (outf ? outf : "/tmp/"); | |
f92d51d8 | 918 | #else /* DOS_NT */ |
f92d51d8 CY |
919 | if ((outf = egetenv ("TMPDIR")) |
920 | || (outf = egetenv ("TMP")) | |
921 | || (outf = egetenv ("TEMP"))) | |
922 | tmpdir = build_string (outf); | |
923 | else | |
924 | tmpdir = Ffile_name_as_directory (build_string ("c:/temp")); | |
0774fcf8 | 925 | #endif |
f92d51d8 | 926 | } |
7e6c2178 | 927 | |
3c59b4c9 | 928 | { |
98c6f1e3 | 929 | Lisp_Object pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir); |
74ba1583 | 930 | char *tempfile; |
94fcd171 | 931 | ptrdiff_t count; |
74ba1583 EZ |
932 | |
933 | #ifdef WINDOWSNT | |
934 | /* Cannot use the result of Fexpand_file_name, because it | |
935 | downcases the XXXXXX part of the pattern, and mktemp then | |
936 | doesn't recognize it. */ | |
937 | if (!NILP (Vw32_downcase_file_names)) | |
938 | { | |
939 | Lisp_Object dirname = Ffile_name_directory (pattern); | |
940 | ||
941 | if (NILP (dirname)) | |
942 | pattern = Vtemp_file_name_pattern; | |
943 | else | |
944 | pattern = concat2 (dirname, Vtemp_file_name_pattern); | |
945 | } | |
946 | #endif | |
947 | ||
bafe80ce PE |
948 | filename_string = Fcopy_sequence (ENCODE_FILE (pattern)); |
949 | GCPRO1 (filename_string); | |
950 | tempfile = SSDATA (filename_string); | |
09494912 | 951 | |
94fcd171 PE |
952 | count = SPECPDL_INDEX (); |
953 | record_unwind_protect_nothing (); | |
954 | fd = mkostemp (tempfile, O_CLOEXEC); | |
955 | if (fd < 0) | |
956 | report_file_error ("Failed to open temporary file using pattern", | |
957 | pattern); | |
958 | set_unwind_protect (count, delete_temp_file, filename_string); | |
959 | record_unwind_protect_int (close_file_unwind, fd); | |
3c59b4c9 PE |
960 | } |
961 | ||
80856e74 JB |
962 | start = args[0]; |
963 | end = args[1]; | |
32d08644 | 964 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
965 | if (!NILP (Vcoding_system_for_write)) |
966 | val = Vcoding_system_for_write; | |
4b4deea2 | 967 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
fcaf8878 | 968 | val = Qraw_text; |
32d08644 | 969 | else |
beacaab3 | 970 | { |
bafe80ce PE |
971 | Lisp_Object coding_systems; |
972 | Lisp_Object *args2; | |
3c59b4c9 | 973 | USE_SAFE_ALLOCA; |
0065d054 | 974 | SAFE_NALLOCA (args2, 1, nargs + 1); |
91489411 | 975 | args2[0] = Qcall_process_region; |
bafe80ce | 976 | memcpy (args2 + 1, args, nargs * sizeof *args); |
91489411 | 977 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 978 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
3c59b4c9 | 979 | SAFE_FREE (); |
beacaab3 | 980 | } |
fcaf8878 | 981 | val = complement_process_encoding_system (val); |
32d08644 | 982 | |
168afdaa | 983 | { |
d311d28c | 984 | ptrdiff_t count1 = SPECPDL_INDEX (); |
168afdaa RS |
985 | |
986 | specbind (intern ("coding-system-for-write"), val); | |
bb951f0e KR |
987 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
988 | happen to get a ".Z" suffix. */ | |
989 | specbind (intern ("file-name-handler-alist"), Qnil); | |
94fcd171 | 990 | write_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil, fd); |
168afdaa RS |
991 | |
992 | unbind_to (count1, Qnil); | |
993 | } | |
91489411 | 994 | |
94fcd171 PE |
995 | if (lseek (fd, 0, SEEK_SET) < 0) |
996 | report_file_error ("Setting file position", filename_string); | |
997 | ||
177c0ea7 | 998 | /* Note that Fcall_process takes care of binding |
91489411 | 999 | coding-system-for-read. */ |
093650fe | 1000 | |
94fcd171 PE |
1001 | *filename_string_ptr = filename_string; |
1002 | UNGCPRO; | |
1003 | return fd; | |
bafe80ce PE |
1004 | } |
1005 | ||
1006 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
1007 | 3, MANY, 0, | |
1008 | doc: /* Send text from START to END to a synchronous process running PROGRAM. | |
1009 | The remaining arguments are optional. | |
1010 | Delete the text if fourth arg DELETE is non-nil. | |
1011 | ||
1012 | Insert output in BUFFER before point; t means current buffer; nil for | |
1013 | BUFFER means discard it; 0 means discard and don't wait; and `(:file | |
1014 | FILE)', where FILE is a file name string, means that it should be | |
1015 | written to that file (if the file already exists it is overwritten). | |
1016 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, | |
1017 | REAL-BUFFER says what to do with standard output, as above, | |
1018 | while STDERR-FILE says what to do with standard error in the child. | |
1019 | STDERR-FILE may be nil (discard standard error output), | |
1020 | t (mix it with ordinary output), or a file name string. | |
1021 | ||
1022 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
1023 | Remaining args are passed to PROGRAM at startup as command args. | |
1024 | ||
1025 | If BUFFER is 0, `call-process-region' returns immediately with value nil. | |
1026 | Otherwise it waits for PROGRAM to terminate | |
1027 | and returns a numeric exit status or a signal description string. | |
1028 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. | |
1029 | ||
1030 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) | |
1031 | (ptrdiff_t nargs, Lisp_Object *args) | |
1032 | { | |
94fcd171 PE |
1033 | struct gcpro gcpro1, gcpro2; |
1034 | Lisp_Object infile, val; | |
bafe80ce PE |
1035 | ptrdiff_t count = SPECPDL_INDEX (); |
1036 | Lisp_Object start = args[0]; | |
1037 | Lisp_Object end = args[1]; | |
1038 | bool empty_input; | |
94fcd171 | 1039 | int fd; |
bafe80ce PE |
1040 | |
1041 | if (STRINGP (start)) | |
1042 | empty_input = SCHARS (start) == 0; | |
1043 | else if (NILP (start)) | |
1044 | empty_input = BEG == Z; | |
1045 | else | |
1046 | { | |
1047 | validate_region (&args[0], &args[1]); | |
1048 | start = args[0]; | |
1049 | end = args[1]; | |
1050 | empty_input = XINT (start) == XINT (end); | |
1051 | } | |
1052 | ||
94fcd171 PE |
1053 | if (!empty_input) |
1054 | fd = create_temp_file (nargs, args, &infile); | |
1055 | else | |
1056 | { | |
1057 | infile = Qnil; | |
1058 | fd = emacs_open (NULL_DEVICE, O_RDONLY, 0); | |
1059 | if (fd < 0) | |
1060 | report_file_error ("Opening null device", Qnil); | |
1061 | record_unwind_protect_int (close_file_unwind, fd); | |
1062 | } | |
1063 | ||
1064 | val = infile; | |
1065 | GCPRO2 (infile, val); | |
80856e74 | 1066 | |
edf496dd | 1067 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
1068 | Fdelete_region (start, end); |
1069 | ||
edf496dd KH |
1070 | if (nargs > 3) |
1071 | { | |
1072 | args += 2; | |
1073 | nargs -= 2; | |
1074 | } | |
1075 | else | |
1076 | { | |
1077 | args[0] = args[2]; | |
1078 | nargs = 2; | |
1079 | } | |
50a30cce | 1080 | args[1] = infile; |
80856e74 | 1081 | |
94fcd171 PE |
1082 | val = call_process (nargs, args, fd); |
1083 | ||
1084 | if (!empty_input && 4 < nargs | |
1085 | && (INTEGERP (CONSP (args[4]) ? XCAR (args[4]) : args[4]))) | |
1086 | { | |
1087 | record_deleted_pid (synch_process_pid, infile); | |
1088 | synch_process_pid = 0; | |
1089 | clear_unwind_protect (count); | |
1090 | } | |
1091 | ||
1092 | RETURN_UNGCPRO (unbind_to (count, val)); | |
80856e74 JB |
1093 | } |
1094 | \f | |
361358ea | 1095 | #ifndef WINDOWSNT |
971de7fb | 1096 | static int relocate_fd (int fd, int minfd); |
361358ea | 1097 | #endif |
dfcf069d | 1098 | |
5990851d KL |
1099 | static char ** |
1100 | add_env (char **env, char **new_env, char *string) | |
1101 | { | |
1102 | char **ep; | |
2f221583 | 1103 | bool ok = 1; |
5990851d KL |
1104 | if (string == NULL) |
1105 | return new_env; | |
1106 | ||
1107 | /* See if this string duplicates any string already in the env. | |
1108 | If so, don't put it in. | |
1109 | When an env var has multiple definitions, | |
1110 | we keep the definition that comes first in process-environment. */ | |
1111 | for (ep = env; ok && ep != new_env; ep++) | |
1112 | { | |
1113 | char *p = *ep, *q = string; | |
1114 | while (ok) | |
19ed11ba AS |
1115 | { |
1116 | if (*q != *p) | |
1117 | break; | |
1118 | if (*q == 0) | |
1119 | /* The string is a lone variable name; keep it for now, we | |
1120 | will remove it later. It is a placeholder for a | |
1121 | variable that is not to be included in the environment. */ | |
1122 | break; | |
1123 | if (*q == '=') | |
1124 | ok = 0; | |
1125 | p++, q++; | |
1126 | } | |
5990851d KL |
1127 | } |
1128 | if (ok) | |
1129 | *new_env++ = string; | |
1130 | return new_env; | |
1131 | } | |
1132 | ||
80856e74 JB |
1133 | /* This is the last thing run in a newly forked inferior |
1134 | either synchronous or asynchronous. | |
1135 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
1136 | Initialize inferior's priority, pgrp, connected dir and environment. | |
1137 | then exec another program based on new_argv. | |
1138 | ||
2f221583 | 1139 | If SET_PGRP, put the subprocess into a separate process group. |
e576cab4 JB |
1140 | |
1141 | CURRENT_DIR is an elisp string giving the path of the current | |
1142 | directory the subprocess should have. Since we can't really signal | |
1143 | a decent error from within the child, this should be verified as an | |
1144 | executable directory by the parent. */ | |
80856e74 | 1145 | |
dfcf069d | 1146 | int |
2f221583 PE |
1147 | child_setup (int in, int out, int err, char **new_argv, bool set_pgrp, |
1148 | Lisp_Object current_dir) | |
80856e74 | 1149 | { |
e576cab4 | 1150 | char **env; |
7fcf7f05 | 1151 | char *pwd_var; |
bad95d8f RS |
1152 | #ifdef WINDOWSNT |
1153 | int cpid; | |
4252a4bd | 1154 | HANDLE handles[3]; |
afacaa1b JB |
1155 | #else |
1156 | int exec_errno; | |
e576cab4 | 1157 | |
d311d28c | 1158 | pid_t pid = getpid (); |
afacaa1b | 1159 | #endif /* WINDOWSNT */ |
80856e74 | 1160 | |
80856e74 JB |
1161 | /* Note that use of alloca is always safe here. It's obvious for systems |
1162 | that do not have true vfork or that have true (stack) alloca. | |
caa01fe0 GM |
1163 | If using vfork and C_ALLOCA (when Emacs used to include |
1164 | src/alloca.c) it is safe because that changes the superior's | |
1165 | static variables as if the superior had done alloca and will be | |
1166 | cleaned up in the usual way. */ | |
e576cab4 | 1167 | { |
7fcf7f05 | 1168 | register char *temp; |
0065d054 | 1169 | size_t i; /* size_t, because ptrdiff_t might overflow here! */ |
77d78be1 | 1170 | |
d5db4077 | 1171 | i = SBYTES (current_dir); |
16425c4a EZ |
1172 | #ifdef MSDOS |
1173 | /* MSDOS must have all environment variables malloc'ed, because | |
1174 | low-level libc functions that launch subsidiary processes rely | |
1175 | on that. */ | |
23f86fce | 1176 | pwd_var = xmalloc (i + 6); |
16425c4a | 1177 | #else |
38182d90 | 1178 | pwd_var = alloca (i + 6); |
16425c4a | 1179 | #endif |
7fcf7f05 | 1180 | temp = pwd_var + 4; |
72af86bd AS |
1181 | memcpy (pwd_var, "PWD=", 4); |
1182 | memcpy (temp, SDATA (current_dir), i); | |
bad95d8f | 1183 | if (!IS_DIRECTORY_SEP (temp[i - 1])) temp[i++] = DIRECTORY_SEP; |
e576cab4 JB |
1184 | temp[i] = 0; |
1185 | ||
c17c4250 | 1186 | #ifndef DOS_NT |
e576cab4 JB |
1187 | /* We can't signal an Elisp error here; we're in a vfork. Since |
1188 | the callers check the current directory before forking, this | |
1189 | should only return an error if the directory's permissions | |
1190 | are changed between the check and this chdir, but we should | |
1191 | at least check. */ | |
1192 | if (chdir (temp) < 0) | |
4ebbdd67 | 1193 | _exit (EXIT_CANCELED); |
f8d23104 | 1194 | #else /* DOS_NT */ |
c17c4250 EZ |
1195 | /* Get past the drive letter, so that d:/ is left alone. */ |
1196 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
1197 | { | |
1198 | temp += 2; | |
1199 | i -= 2; | |
1200 | } | |
f8d23104 | 1201 | #endif /* DOS_NT */ |
c17c4250 | 1202 | |
7fcf7f05 | 1203 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 1204 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 1205 | temp[--i] = 0; |
e576cab4 | 1206 | } |
80856e74 | 1207 | |
5990851d | 1208 | /* Set `env' to a vector of the strings in the environment. */ |
80856e74 JB |
1209 | { |
1210 | register Lisp_Object tem; | |
1211 | register char **new_env; | |
5990851d | 1212 | char **p, **q; |
80856e74 | 1213 | register int new_length; |
d2bb6598 | 1214 | Lisp_Object display = Qnil; |
361358ea | 1215 | |
80856e74 | 1216 | new_length = 0; |
f105f403 | 1217 | |
80856e74 | 1218 | for (tem = Vprocess_environment; |
19ed11ba AS |
1219 | CONSP (tem) && STRINGP (XCAR (tem)); |
1220 | tem = XCDR (tem)) | |
d2bb6598 | 1221 | { |
42a5b22f | 1222 | if (strncmp (SSDATA (XCAR (tem)), "DISPLAY", 7) == 0 |
d2bb6598 SM |
1223 | && (SDATA (XCAR (tem)) [7] == '\0' |
1224 | || SDATA (XCAR (tem)) [7] == '=')) | |
1225 | /* DISPLAY is specified in process-environment. */ | |
1226 | display = Qt; | |
1227 | new_length++; | |
1228 | } | |
de87fb59 | 1229 | |
d2bb6598 SM |
1230 | /* If not provided yet, use the frame's DISPLAY. */ |
1231 | if (NILP (display)) | |
1232 | { | |
1233 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); | |
1234 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) | |
1235 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1236 | tmp = Fgetenv_internal (build_string ("DISPLAY"), | |
1237 | Vinitial_environment); | |
1238 | if (STRINGP (tmp)) | |
1239 | { | |
1240 | display = tmp; | |
1241 | new_length++; | |
1242 | } | |
1243 | } | |
80856e74 | 1244 | |
7fcf7f05 | 1245 | /* new_length + 2 to include PWD and terminating 0. */ |
38182d90 | 1246 | env = new_env = alloca ((new_length + 2) * sizeof *env); |
7fcf7f05 RS |
1247 | /* If we have a PWD envvar, pass one down, |
1248 | but with corrected value. */ | |
a13f8f50 | 1249 | if (egetenv ("PWD")) |
7fcf7f05 | 1250 | *new_env++ = pwd_var; |
361358ea | 1251 | |
6b8e474c | 1252 | if (STRINGP (display)) |
de87fb59 | 1253 | { |
38182d90 | 1254 | char *vdata = alloca (sizeof "DISPLAY=" + SBYTES (display)); |
de87fb59 | 1255 | strcpy (vdata, "DISPLAY="); |
42a5b22f | 1256 | strcat (vdata, SSDATA (display)); |
de87fb59 DN |
1257 | new_env = add_env (env, new_env, vdata); |
1258 | } | |
80856e74 | 1259 | |
5990851d | 1260 | /* Overrides. */ |
80856e74 | 1261 | for (tem = Vprocess_environment; |
70949dac KR |
1262 | CONSP (tem) && STRINGP (XCAR (tem)); |
1263 | tem = XCDR (tem)) | |
42a5b22f | 1264 | new_env = add_env (env, new_env, SSDATA (XCAR (tem))); |
d2bb6598 | 1265 | |
5990851d KL |
1266 | *new_env = 0; |
1267 | ||
1268 | /* Remove variable names without values. */ | |
1269 | p = q = env; | |
1270 | while (*p != 0) | |
cd9565ba | 1271 | { |
19ed11ba AS |
1272 | while (*q != 0 && strchr (*q, '=') == NULL) |
1273 | q++; | |
1274 | *p = *q++; | |
1275 | if (*p != 0) | |
1276 | p++; | |
cd9565ba | 1277 | } |
80856e74 | 1278 | } |
de87fb59 | 1279 | |
361358ea | 1280 | |
bad95d8f RS |
1281 | #ifdef WINDOWSNT |
1282 | prepare_standard_handles (in, out, err, handles); | |
d5db4077 | 1283 | set_process_dir (SDATA (current_dir)); |
d3d14b40 | 1284 | /* Spawn the child. (See w32proc.c:sys_spawnve). */ |
67802943 DN |
1285 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); |
1286 | reset_standard_handles (in, out, err, handles); | |
1287 | if (cpid == -1) | |
1288 | /* An error occurred while trying to spawn the process. */ | |
1289 | report_file_error ("Spawning child process", Qnil); | |
1290 | return cpid; | |
1291 | ||
bad95d8f | 1292 | #else /* not WINDOWSNT */ |
426b37ae JB |
1293 | /* Make sure that in, out, and err are not actually already in |
1294 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1295 | started with its standard in, out, or error closed, as might |
426b37ae | 1296 | happen under X. */ |
f29f9e4a RS |
1297 | { |
1298 | int oin = in, oout = out; | |
1299 | ||
1300 | /* We have to avoid relocating the same descriptor twice! */ | |
1301 | ||
1302 | in = relocate_fd (in, 3); | |
1303 | ||
1304 | if (out == oin) | |
1305 | out = in; | |
1306 | else | |
3e9367e7 | 1307 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1308 | |
1309 | if (err == oin) | |
1310 | err = in; | |
1311 | else if (err == oout) | |
1312 | err = out; | |
1313 | else | |
3e9367e7 | 1314 | err = relocate_fd (err, 3); |
f29f9e4a | 1315 | } |
426b37ae | 1316 | |
c17c4250 | 1317 | #ifndef MSDOS |
4700b5a5 PE |
1318 | /* Redirect file descriptors and clear the close-on-exec flag on the |
1319 | redirected ones. IN, OUT, and ERR are close-on-exec so they | |
1320 | need not be closed explicitly. */ | |
80856e74 JB |
1321 | dup2 (in, 0); |
1322 | dup2 (out, 1); | |
1323 | dup2 (err, 2); | |
067428c1 | 1324 | |
dd0333b6 | 1325 | setpgid (0, 0); |
12e610e8 | 1326 | tcsetpgrp (0, pid); |
a7ebc409 | 1327 | |
21e54a94 | 1328 | execve (new_argv[0], new_argv, env); |
ee010797 | 1329 | exec_errno = errno; |
80856e74 | 1330 | |
ee010797 PE |
1331 | /* Avoid deadlock if the child's perror writes to a full pipe; the |
1332 | pipe's reader is the parent, but with vfork the parent can't | |
1333 | run until the child exits. Truncate the diagnostic instead. */ | |
1334 | fcntl (STDERR_FILENO, F_SETFL, O_NONBLOCK); | |
4ebbdd67 | 1335 | |
ee010797 PE |
1336 | errno = exec_errno; |
1337 | emacs_perror (new_argv[0]); | |
1338 | _exit (exec_errno == ENOENT ? EXIT_ENOENT : EXIT_CANNOT_INVOKE); | |
67802943 DN |
1339 | |
1340 | #else /* MSDOS */ | |
1341 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
1342 | xfree (pwd_var); | |
1343 | if (pid == -1) | |
1344 | /* An error occurred while trying to run the subprocess. */ | |
1345 | report_file_error ("Spawning child process", Qnil); | |
1346 | return pid; | |
1347 | #endif /* MSDOS */ | |
ae76d9e1 | 1348 | #endif /* not WINDOWSNT */ |
80856e74 JB |
1349 | } |
1350 | ||
361358ea | 1351 | #ifndef WINDOWSNT |
a3833dfe | 1352 | /* Move the file descriptor FD so that its number is not less than MINFD. |
4700b5a5 PE |
1353 | If the file descriptor is moved at all, the original is closed on MSDOS, |
1354 | but not elsewhere as the caller will close it anyway. */ | |
dfcf069d | 1355 | static int |
971de7fb | 1356 | relocate_fd (int fd, int minfd) |
426b37ae | 1357 | { |
a3833dfe | 1358 | if (fd >= minfd) |
426b37ae JB |
1359 | return fd; |
1360 | else | |
1361 | { | |
067428c1 | 1362 | int new = fcntl (fd, F_DUPFD_CLOEXEC, minfd); |
426b37ae JB |
1363 | if (new == -1) |
1364 | { | |
4ebbdd67 PE |
1365 | emacs_perror ("while setting up child"); |
1366 | _exit (EXIT_CANCELED); | |
426b37ae | 1367 | } |
4700b5a5 | 1368 | #ifdef MSDOS |
68c45bf0 | 1369 | emacs_close (fd); |
4700b5a5 | 1370 | #endif |
426b37ae JB |
1371 | return new; |
1372 | } | |
1373 | } | |
361358ea | 1374 | #endif /* not WINDOWSNT */ |
426b37ae | 1375 | |
2f221583 | 1376 | static bool |
989f33ba PE |
1377 | getenv_internal_1 (const char *var, ptrdiff_t varlen, char **value, |
1378 | ptrdiff_t *valuelen, Lisp_Object env) | |
012c6fcb | 1379 | { |
db699fc6 | 1380 | for (; CONSP (env); env = XCDR (env)) |
012c6fcb | 1381 | { |
db699fc6 | 1382 | Lisp_Object entry = XCAR (env); |
d50d3dc8 | 1383 | if (STRINGP (entry) |
db699fc6 | 1384 | && SBYTES (entry) >= varlen |
bad95d8f RS |
1385 | #ifdef WINDOWSNT |
1386 | /* NT environment variables are case insensitive. */ | |
d5db4077 | 1387 | && ! strnicmp (SDATA (entry), var, varlen) |
bad95d8f | 1388 | #else /* not WINDOWSNT */ |
72af86bd | 1389 | && ! memcmp (SDATA (entry), var, varlen) |
bad95d8f | 1390 | #endif /* not WINDOWSNT */ |
a9971c6d | 1391 | ) |
012c6fcb | 1392 | { |
db699fc6 SM |
1393 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') |
1394 | { | |
51b59d79 | 1395 | *value = SSDATA (entry) + (varlen + 1); |
db699fc6 SM |
1396 | *valuelen = SBYTES (entry) - (varlen + 1); |
1397 | return 1; | |
1398 | } | |
1399 | else if (SBYTES (entry) == varlen) | |
1400 | { | |
1401 | /* Lone variable names in Vprocess_environment mean that | |
1402 | variable should be removed from the environment. */ | |
1403 | *value = NULL; | |
1404 | return 1; | |
1405 | } | |
1406 | } | |
1407 | } | |
1408 | return 0; | |
1409 | } | |
1410 | ||
2f221583 | 1411 | static bool |
989f33ba PE |
1412 | getenv_internal (const char *var, ptrdiff_t varlen, char **value, |
1413 | ptrdiff_t *valuelen, Lisp_Object frame) | |
012c6fcb | 1414 | { |
d2bb6598 SM |
1415 | /* Try to find VAR in Vprocess_environment first. */ |
1416 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1417 | Vprocess_environment)) | |
1418 | return *value ? 1 : 0; | |
f105f403 | 1419 | |
d2bb6598 | 1420 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
de87fb59 | 1421 | if (strcmp (var, "DISPLAY") == 0) |
d2bb6598 SM |
1422 | { |
1423 | Lisp_Object display | |
1424 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); | |
1425 | if (STRINGP (display)) | |
1426 | { | |
51b59d79 | 1427 | *value = SSDATA (display); |
de87fb59 | 1428 | *valuelen = SBYTES (display); |
012c6fcb JA |
1429 | return 1; |
1430 | } | |
d2bb6598 SM |
1431 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
1432 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1433 | Vinitial_environment)) | |
1434 | return *value ? 1 : 0; | |
012c6fcb JA |
1435 | } |
1436 | ||
1437 | return 0; | |
1438 | } | |
1439 | ||
f105f403 | 1440 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
5990851d KL |
1441 | doc: /* Get the value of environment variable VARIABLE. |
1442 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
1443 | the environment. Otherwise, value is a string. | |
f105f403 | 1444 | |
acf20901 | 1445 | This function searches `process-environment' for VARIABLE. |
5990851d | 1446 | |
db699fc6 | 1447 | If optional parameter ENV is a list, then search this list instead of |
acf20901 JB |
1448 | `process-environment', and return t when encountering a negative entry |
1449 | \(an entry for a variable with no value). */) | |
5842a27b | 1450 | (Lisp_Object variable, Lisp_Object env) |
012c6fcb JA |
1451 | { |
1452 | char *value; | |
989f33ba | 1453 | ptrdiff_t valuelen; |
012c6fcb | 1454 | |
5990851d | 1455 | CHECK_STRING (variable); |
db699fc6 SM |
1456 | if (CONSP (env)) |
1457 | { | |
42a5b22f | 1458 | if (getenv_internal_1 (SSDATA (variable), SBYTES (variable), |
db699fc6 SM |
1459 | &value, &valuelen, env)) |
1460 | return value ? make_string (value, valuelen) : Qt; | |
1461 | else | |
1462 | return Qnil; | |
1463 | } | |
42a5b22f | 1464 | else if (getenv_internal (SSDATA (variable), SBYTES (variable), |
d2bb6598 | 1465 | &value, &valuelen, env)) |
012c6fcb JA |
1466 | return make_string (value, valuelen); |
1467 | else | |
1468 | return Qnil; | |
1469 | } | |
1470 | ||
5990851d KL |
1471 | /* A version of getenv that consults the Lisp environment lists, |
1472 | easily callable from C. */ | |
012c6fcb | 1473 | char * |
a8fe7202 | 1474 | egetenv (const char *var) |
012c6fcb JA |
1475 | { |
1476 | char *value; | |
25c7e41f | 1477 | ptrdiff_t valuelen; |
012c6fcb | 1478 | |
f105f403 | 1479 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
012c6fcb JA |
1480 | return value; |
1481 | else | |
1482 | return 0; | |
1483 | } | |
1484 | ||
80856e74 | 1485 | \f |
8de15d69 | 1486 | /* This is run before init_cmdargs. */ |
177c0ea7 | 1487 | |
dfcf069d | 1488 | void |
971de7fb | 1489 | init_callproc_1 (void) |
8de15d69 | 1490 | { |
d01ba2f1 GM |
1491 | #ifdef HAVE_NS |
1492 | const char *etc_dir = ns_etc_directory (); | |
cbb31951 | 1493 | const char *path_exec = ns_exec_path (); |
d01ba2f1 | 1494 | #endif |
35a2f4b8 | 1495 | |
76151e2c | 1496 | Vdata_directory = decode_env_path ("EMACSDATA", |
d01ba2f1 | 1497 | #ifdef HAVE_NS |
76151e2c | 1498 | etc_dir ? etc_dir : |
d01ba2f1 | 1499 | #endif |
76151e2c EZ |
1500 | PATH_DATA); |
1501 | Vdata_directory = Ffile_name_as_directory (Fcar (Vdata_directory)); | |
1502 | ||
1503 | Vdoc_directory = decode_env_path ("EMACSDOC", | |
d01ba2f1 | 1504 | #ifdef HAVE_NS |
76151e2c | 1505 | etc_dir ? etc_dir : |
d01ba2f1 | 1506 | #endif |
76151e2c EZ |
1507 | PATH_DOC); |
1508 | Vdoc_directory = Ffile_name_as_directory (Fcar (Vdoc_directory)); | |
9453ea7b | 1509 | |
e576cab4 | 1510 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1511 | PATH_EXEC path from epaths.h. */ |
cbb31951 GM |
1512 | Vexec_path = decode_env_path ("EMACSPATH", |
1513 | #ifdef HAVE_NS | |
1514 | path_exec ? path_exec : | |
1515 | #endif | |
1516 | PATH_EXEC); | |
80856e74 | 1517 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
cbb31951 | 1518 | /* FIXME? For ns, path_exec should go at the front? */ |
80856e74 | 1519 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); |
8de15d69 RS |
1520 | } |
1521 | ||
e17f7533 | 1522 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1523 | |
dfcf069d | 1524 | void |
971de7fb | 1525 | init_callproc (void) |
8de15d69 RS |
1526 | { |
1527 | char *data_dir = egetenv ("EMACSDATA"); | |
177c0ea7 | 1528 | |
8de15d69 RS |
1529 | register char * sh; |
1530 | Lisp_Object tempdir; | |
d01ba2f1 GM |
1531 | #ifdef HAVE_NS |
1532 | if (data_dir == 0) | |
1533 | { | |
1534 | const char *etc_dir = ns_etc_directory (); | |
1535 | if (etc_dir) | |
1536 | { | |
1537 | data_dir = alloca (strlen (etc_dir) + 1); | |
1538 | strcpy (data_dir, etc_dir); | |
1539 | } | |
1540 | } | |
1541 | #endif | |
8de15d69 | 1542 | |
9cc4fad5 | 1543 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1544 | { |
05630743 RS |
1545 | /* Add to the path the lib-src subdir of the installation dir. */ |
1546 | Lisp_Object tem; | |
1547 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1548 | Vinstallation_directory); | |
76151e2c | 1549 | #ifndef MSDOS |
1a6640ec | 1550 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc | 1551 | if (NILP (Fmember (tem, Vexec_path))) |
70ec1377 | 1552 | { |
cbb31951 GM |
1553 | #ifdef HAVE_NS |
1554 | const char *path_exec = ns_exec_path (); | |
1555 | #endif | |
1556 | Vexec_path = decode_env_path ("EMACSPATH", | |
1557 | #ifdef HAVE_NS | |
1558 | path_exec ? path_exec : | |
1559 | #endif | |
1560 | PATH_EXEC); | |
70ec1377 RS |
1561 | Vexec_path = Fcons (tem, Vexec_path); |
1562 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
1563 | } | |
177c0ea7 | 1564 | |
0fa248bc | 1565 | Vexec_directory = Ffile_name_as_directory (tem); |
76151e2c | 1566 | #endif /* not MSDOS */ |
8de15d69 | 1567 | |
e17f7533 RS |
1568 | /* Maybe use ../etc as well as ../lib-src. */ |
1569 | if (data_dir == 0) | |
1570 | { | |
1571 | tem = Fexpand_file_name (build_string ("etc"), | |
1572 | Vinstallation_directory); | |
1573 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1574 | } |
1575 | } | |
7e933683 RS |
1576 | |
1577 | /* Look for the files that should be in etc. We don't use | |
1578 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1579 | near the executable, and they are never in the build |
7e933683 RS |
1580 | directory when that's different from the source directory. |
1581 | ||
1582 | Instead, if these files are not in the nominal place, we try the | |
1583 | source directory. */ | |
1584 | if (data_dir == 0) | |
1585 | { | |
70ec1377 | 1586 | Lisp_Object tem, tem1, srcdir; |
7e933683 | 1587 | |
70ec1377 RS |
1588 | srcdir = Fexpand_file_name (build_string ("../src/"), |
1589 | build_string (PATH_DUMPLOADSEARCH)); | |
7e933683 RS |
1590 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); |
1591 | tem1 = Ffile_exists_p (tem); | |
70ec1377 | 1592 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
7e933683 | 1593 | { |
70ec1377 | 1594 | Lisp_Object newdir; |
7e933683 RS |
1595 | newdir = Fexpand_file_name (build_string ("../etc/"), |
1596 | build_string (PATH_DUMPLOADSEARCH)); | |
1597 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1598 | tem1 = Ffile_exists_p (tem); | |
1599 | if (!NILP (tem1)) | |
1600 | Vdata_directory = newdir; | |
1601 | } | |
1602 | } | |
80856e74 | 1603 | |
d883eb62 RS |
1604 | #ifndef CANNOT_DUMP |
1605 | if (initialized) | |
1606 | #endif | |
1607 | { | |
1608 | tempdir = Fdirectory_file_name (Vexec_directory); | |
73dcdb9f PE |
1609 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
1610 | dir_warning ("arch-dependent data dir", Vexec_directory); | |
d883eb62 | 1611 | } |
80856e74 | 1612 | |
e576cab4 | 1613 | tempdir = Fdirectory_file_name (Vdata_directory); |
73dcdb9f PE |
1614 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
1615 | dir_warning ("arch-independent data dir", Vdata_directory); | |
e576cab4 | 1616 | |
83be8524 | 1617 | sh = getenv ("SHELL"); |
80856e74 | 1618 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
8abd035b | 1619 | |
40b49d4b JB |
1620 | #ifdef DOS_NT |
1621 | Vshared_game_score_directory = Qnil; | |
1622 | #else | |
63789758 | 1623 | Vshared_game_score_directory = build_string (PATH_GAME); |
73dcdb9f | 1624 | if (NILP (Ffile_accessible_directory_p (Vshared_game_score_directory))) |
63789758 | 1625 | Vshared_game_score_directory = Qnil; |
40b49d4b | 1626 | #endif |
9fefd2ba JB |
1627 | } |
1628 | ||
dfcf069d | 1629 | void |
971de7fb | 1630 | set_initial_environment (void) |
9fefd2ba | 1631 | { |
738db178 DN |
1632 | char **envp; |
1633 | for (envp = environ; *envp; envp++) | |
1634 | Vprocess_environment = Fcons (build_string (*envp), | |
1635 | Vprocess_environment); | |
1636 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent | |
1637 | to use `delete' and friends on process-environment. */ | |
1638 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); | |
80856e74 JB |
1639 | } |
1640 | ||
dfcf069d | 1641 | void |
971de7fb | 1642 | syms_of_callproc (void) |
80856e74 | 1643 | { |
f92d51d8 CY |
1644 | #ifndef DOS_NT |
1645 | Vtemp_file_name_pattern = build_string ("emacsXXXXXX"); | |
1646 | #elif defined (WINDOWSNT) | |
1647 | Vtemp_file_name_pattern = build_string ("emXXXXXX"); | |
1648 | #else | |
1649 | Vtemp_file_name_pattern = build_string ("detmp.XXX"); | |
1650 | #endif | |
1651 | staticpro (&Vtemp_file_name_pattern); | |
1652 | ||
94fcd171 PE |
1653 | #ifdef MSDOS |
1654 | synch_process_tempfile = make_number (0); | |
1655 | staticpro (&synch_process_tempfile); | |
1656 | #endif | |
1657 | ||
29208e82 | 1658 | DEFVAR_LISP ("shell-file-name", Vshell_file_name, |
fb7ada5f | 1659 | doc: /* File name to load inferior shells from. |
b20b29be EZ |
1660 | Initialized from the SHELL environment variable, or to a system-dependent |
1661 | default if SHELL is not set. */); | |
80856e74 | 1662 | |
29208e82 | 1663 | DEFVAR_LISP ("exec-path", Vexec_path, |
fb7ada5f | 1664 | doc: /* List of directories to search programs to run in subprocesses. |
fdb82f93 | 1665 | Each element is a string (directory name) or nil (try default directory). */); |
80856e74 | 1666 | |
29208e82 | 1667 | DEFVAR_LISP ("exec-suffixes", Vexec_suffixes, |
fb7ada5f | 1668 | doc: /* List of suffixes to try to find executable file names. |
fdb82f93 | 1669 | Each element is a string. */); |
33d5af99 | 1670 | Vexec_suffixes = Qnil; |
b81a1b72 | 1671 | |
29208e82 | 1672 | DEFVAR_LISP ("exec-directory", Vexec_directory, |
fdb82f93 PJ |
1673 | doc: /* Directory for executables for Emacs to invoke. |
1674 | More generally, this includes any architecture-dependent files | |
1675 | that are built and installed from the Emacs distribution. */); | |
e576cab4 | 1676 | |
29208e82 | 1677 | DEFVAR_LISP ("data-directory", Vdata_directory, |
fdb82f93 PJ |
1678 | doc: /* Directory of machine-independent files that come with GNU Emacs. |
1679 | These are files intended for Emacs to use while it runs. */); | |
80856e74 | 1680 | |
29208e82 | 1681 | DEFVAR_LISP ("doc-directory", Vdoc_directory, |
fdb82f93 | 1682 | doc: /* Directory containing the DOC file that comes with GNU Emacs. |
ebf24b59 | 1683 | This is usually the same as `data-directory'. */); |
35a2f4b8 | 1684 | |
29208e82 | 1685 | DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory, |
fdb82f93 PJ |
1686 | doc: /* For internal use by the build procedure only. |
1687 | This is the name of the directory in which the build procedure installed | |
ebf24b59 | 1688 | Emacs's info files; the default value for `Info-default-directory-list' |
fdb82f93 | 1689 | includes this. */); |
ed61592a JB |
1690 | Vconfigure_info_directory = build_string (PATH_INFO); |
1691 | ||
29208e82 | 1692 | DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory, |
b065672a CW |
1693 | doc: /* Directory of score files for games which come with GNU Emacs. |
1694 | If this variable is nil, then Emacs is unable to use a shared directory. */); | |
40b49d4b JB |
1695 | #ifdef DOS_NT |
1696 | Vshared_game_score_directory = Qnil; | |
1697 | #else | |
63789758 | 1698 | Vshared_game_score_directory = build_string (PATH_GAME); |
40b49d4b | 1699 | #endif |
b065672a | 1700 | |
29208e82 | 1701 | DEFVAR_LISP ("initial-environment", Vinitial_environment, |
6b8e474c SM |
1702 | doc: /* List of environment variables inherited from the parent process. |
1703 | Each element should be a string of the form ENVVARNAME=VALUE. | |
1704 | The elements must normally be decoded (using `locale-coding-system') for use. */); | |
1705 | Vinitial_environment = Qnil; | |
1706 | ||
29208e82 | 1707 | DEFVAR_LISP ("process-environment", Vprocess_environment, |
5990851d | 1708 | doc: /* List of overridden environment variables for subprocesses to inherit. |
fdb82f93 | 1709 | Each element should be a string of the form ENVVARNAME=VALUE. |
5990851d | 1710 | |
a13f8f50 KL |
1711 | Entries in this list take precedence to those in the frame-local |
1712 | environments. Therefore, let-binding `process-environment' is an easy | |
1713 | way to temporarily change the value of an environment variable, | |
1714 | irrespective of where it comes from. To use `process-environment' to | |
1715 | remove an environment variable, include only its name in the list, | |
1716 | without "=VALUE". | |
5990851d KL |
1717 | |
1718 | This variable is set to nil when Emacs starts. | |
1719 | ||
fdb82f93 PJ |
1720 | If multiple entries define the same variable, the first one always |
1721 | takes precedence. | |
5990851d | 1722 | |
776a24a1 | 1723 | Non-ASCII characters are encoded according to the initial value of |
5990851d KL |
1724 | `locale-coding-system', i.e. the elements must normally be decoded for |
1725 | use. | |
1726 | ||
776a24a1 | 1727 | See `setenv' and `getenv'. */); |
86f5ca04 | 1728 | Vprocess_environment = Qnil; |
80856e74 | 1729 | |
80856e74 | 1730 | defsubr (&Scall_process); |
83fa009c | 1731 | defsubr (&Sgetenv_internal); |
e576cab4 | 1732 | defsubr (&Scall_process_region); |
80856e74 | 1733 | } |