Commit | Line | Data |
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80856e74 | 1 | /* Synchronous subprocess invocation for GNU Emacs. |
acaf905b | 2 | Copyright (C) 1985-1988, 1993-1995, 1999-2012 |
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 | |
34 | #include <windows.h> | |
489f9371 | 35 | #include "w32.h" |
bad95d8f RS |
36 | #define _P_NOWAIT 1 /* from process.h */ |
37 | #endif | |
38 | ||
7e6c2178 | 39 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
7e6c2178 RS |
40 | #include <sys/stat.h> |
41 | #include <sys/param.h> | |
7e6c2178 RS |
42 | #endif /* MSDOS */ |
43 | ||
80856e74 | 44 | #include "commands.h" |
91183bfd | 45 | #include "character.h" |
e5560ff7 | 46 | #include "buffer.h" |
edf496dd | 47 | #include "ccl.h" |
32d08644 | 48 | #include "coding.h" |
f0b950cf | 49 | #include "composite.h" |
57bda87a | 50 | #include <epaths.h> |
80856e74 | 51 | #include "process.h" |
d177f194 | 52 | #include "syssignal.h" |
a129418f | 53 | #include "systty.h" |
afea8a8a | 54 | #include "syswait.h" |
aba637ec | 55 | #include "blockinput.h" |
f105f403 KL |
56 | #include "frame.h" |
57 | #include "termhooks.h" | |
80856e74 | 58 | |
5f027cea EZ |
59 | #ifdef MSDOS |
60 | #include "msdos.h" | |
61 | #endif | |
62 | ||
d01ba2f1 GM |
63 | #ifdef HAVE_NS |
64 | #include "nsterm.h" | |
65 | #endif | |
66 | ||
f92d51d8 CY |
67 | /* Pattern used by call-process-region to make temp files. */ |
68 | static Lisp_Object Vtemp_file_name_pattern; | |
69 | ||
bb5f74ee PE |
70 | /* The next two variables are valid only while record-unwind-protect |
71 | is in place during call-process for a synchronous subprocess. At | |
72 | other times, their contents are irrelevant. Doing this via static | |
73 | C variables is more convenient than putting them into the arguments | |
74 | of record-unwind-protect, as they need to be updated at randomish | |
75 | times in the code, and Lisp cannot always store these values as | |
76 | Emacs integers. It's safe to use static variables here, as the | |
77 | code is never invoked reentrantly. */ | |
78 | ||
79 | /* If nonzero, a process-ID that has not been reaped. */ | |
80 | static pid_t synch_process_pid; | |
81 | ||
82 | /* If nonnegative, a file descriptor that has not been closed. */ | |
83 | static int synch_process_fd; | |
84 | \f | |
85 | /* Block SIGCHLD. */ | |
80856e74 | 86 | |
bb5f74ee PE |
87 | static void |
88 | block_child_signal (void) | |
89 | { | |
90 | #ifdef SIGCHLD | |
91 | sigset_t blocked; | |
92 | sigemptyset (&blocked); | |
93 | sigaddset (&blocked, SIGCHLD); | |
94 | pthread_sigmask (SIG_BLOCK, &blocked, 0); | |
95 | #endif | |
96 | } | |
6b61353c | 97 | |
bb5f74ee | 98 | /* Unblock SIGCHLD. */ |
f105f403 | 99 | |
bb5f74ee PE |
100 | static void |
101 | unblock_child_signal (void) | |
102 | { | |
103 | #ifdef SIGCHLD | |
104 | pthread_sigmask (SIG_SETMASK, &empty_mask, 0); | |
105 | #endif | |
106 | } | |
37d54121 | 107 | |
bb5f74ee | 108 | /* Clean up when exiting call_process_cleanup. */ |
37d54121 | 109 | |
d177f194 | 110 | static Lisp_Object |
bb5f74ee | 111 | call_process_kill (Lisp_Object ignored) |
d177f194 | 112 | { |
bb5f74ee PE |
113 | if (0 <= synch_process_fd) |
114 | emacs_close (synch_process_fd); | |
115 | ||
116 | /* If PID is reapable, kill it and record it as a deleted process. | |
117 | Do this in a critical section. Unless PID is wedged it will be | |
118 | reaped on receipt of the first SIGCHLD after the critical section. */ | |
119 | if (synch_process_pid) | |
120 | { | |
121 | block_child_signal (); | |
122 | record_deleted_pid (synch_process_pid); | |
123 | EMACS_KILLPG (synch_process_pid, SIGKILL); | |
124 | unblock_child_signal (); | |
125 | } | |
126 | ||
d177f194 JB |
127 | return Qnil; |
128 | } | |
129 | ||
bb5f74ee PE |
130 | /* Clean up when exiting Fcall_process. |
131 | On MSDOS, delete the temporary file on any kind of termination. | |
132 | On Unix, kill the process and any children on termination by signal. */ | |
133 | ||
7710357c | 134 | static Lisp_Object |
971de7fb | 135 | call_process_cleanup (Lisp_Object arg) |
80856e74 | 136 | { |
bb5f74ee PE |
137 | #ifdef MSDOS |
138 | Lisp_Object buffer = Fcar (arg); | |
139 | Lisp_Object file = Fcdr (arg); | |
ad3aaf33 | 140 | #else |
bb5f74ee | 141 | Lisp_Object buffer = arg; |
ad3aaf33 AS |
142 | #endif |
143 | ||
bb5f74ee | 144 | Fset_buffer (buffer); |
d177f194 | 145 | |
bb5f74ee PE |
146 | #ifndef MSDOS |
147 | /* If the process still exists, kill its process group. */ | |
148 | if (synch_process_pid) | |
d177f194 | 149 | { |
d311d28c | 150 | ptrdiff_t count = SPECPDL_INDEX (); |
bb5f74ee PE |
151 | EMACS_KILLPG (synch_process_pid, SIGINT); |
152 | record_unwind_protect (call_process_kill, make_number (0)); | |
d177f194 JB |
153 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); |
154 | immediate_quit = 1; | |
155 | QUIT; | |
bb5f74ee PE |
156 | wait_for_termination (synch_process_pid, 0, 1); |
157 | synch_process_pid = 0; | |
d177f194 JB |
158 | immediate_quit = 0; |
159 | specpdl_ptr = specpdl + count; /* Discard the unwind protect. */ | |
160 | message1 ("Waiting for process to die...done"); | |
161 | } | |
bb5f74ee PE |
162 | #endif |
163 | ||
164 | if (0 <= synch_process_fd) | |
165 | emacs_close (synch_process_fd); | |
166 | ||
167 | #ifdef MSDOS | |
168 | /* FILE is "" when we didn't actually create a temporary file in | |
169 | call-process. */ | |
170 | if (!(strcmp (SDATA (file), NULL_DEVICE) == 0 || SREF (file, 0) == '\0')) | |
171 | unlink (SDATA (file)); | |
172 | #endif | |
173 | ||
80856e74 JB |
174 | return Qnil; |
175 | } | |
176 | ||
a7ca3326 | 177 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, |
fdb82f93 PJ |
178 | doc: /* Call PROGRAM synchronously in separate process. |
179 | The remaining arguments are optional. | |
180 | The program's input comes from file INFILE (nil means `/dev/null'). | |
1ef14cb4 LMI |
181 | Insert output in BUFFER before point; t means current buffer; nil for BUFFER |
182 | means discard it; 0 means discard and don't wait; and `(:file FILE)', where | |
1b9f60cc GM |
183 | FILE is a file name string, means that it should be written to that file |
184 | \(if the file already exists it is overwritten). | |
fdb82f93 PJ |
185 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
186 | REAL-BUFFER says what to do with standard output, as above, | |
187 | while STDERR-FILE says what to do with standard error in the child. | |
188 | STDERR-FILE may be nil (discard standard error output), | |
189 | t (mix it with ordinary output), or a file name string. | |
190 | ||
191 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
192 | Remaining arguments are strings passed as command arguments to PROGRAM. | |
193 | ||
a4feb144 RS |
194 | If executable PROGRAM can't be found as an executable, `call-process' |
195 | signals a Lisp error. `call-process' reports errors in execution of | |
196 | the program only through its return and output. | |
197 | ||
fdb82f93 PJ |
198 | If BUFFER is 0, `call-process' returns immediately with value nil. |
199 | Otherwise it waits for PROGRAM to terminate | |
200 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
201 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
202 | ||
203 | usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */) | |
f66c7cf8 | 204 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 205 | { |
bb5f74ee | 206 | Lisp_Object infile, buffer, current_dir, path; |
2f221583 | 207 | bool display_p; |
60aeceb8 | 208 | int fd0, fd1, filefd; |
bb5f74ee | 209 | int status; |
d311d28c PE |
210 | ptrdiff_t count = SPECPDL_INDEX (); |
211 | USE_SAFE_ALLOCA; | |
2d607244 | 212 | |
60aeceb8 | 213 | char **new_argv; |
39eaa782 RS |
214 | /* File to use for stderr in the child. |
215 | t means use same as standard output. */ | |
216 | Lisp_Object error_file; | |
1ef14cb4 | 217 | Lisp_Object output_file = Qnil; |
7e6c2178 | 218 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
888c9e86 | 219 | char *outf, *tempfile = NULL; |
7e6c2178 | 220 | int outfilefd; |
d311d28c PE |
221 | int pid; |
222 | #else | |
223 | pid_t pid; | |
80856e74 | 224 | #endif |
bb5f74ee | 225 | int child_errno; |
1ef14cb4 | 226 | int fd_output = -1; |
32d08644 KH |
227 | struct coding_system process_coding; /* coding-system of process output */ |
228 | struct coding_system argument_coding; /* coding-system of arguments */ | |
09494912 RS |
229 | /* Set to the return value of Ffind_operation_coding_system. */ |
230 | Lisp_Object coding_systems; | |
2f221583 | 231 | bool output_to_buffer = 1; |
09494912 RS |
232 | |
233 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ | |
234 | coding_systems = Qt; | |
32d08644 | 235 | |
b7826503 | 236 | CHECK_STRING (args[0]); |
80856e74 | 237 | |
39eaa782 RS |
238 | error_file = Qt; |
239 | ||
7e6c2178 RS |
240 | #ifndef subprocesses |
241 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
177c0ea7 | 242 | if (nargs >= 3 |
09ffb8b5 | 243 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
244 | error ("Operating system cannot handle asynchronous subprocesses"); |
245 | #endif /* subprocesses */ | |
246 | ||
09494912 | 247 | /* Decide the coding-system for giving arguments. */ |
32d08644 KH |
248 | { |
249 | Lisp_Object val, *args2; | |
f66c7cf8 | 250 | ptrdiff_t i; |
32d08644 KH |
251 | |
252 | /* If arguments are supplied, we may have to encode them. */ | |
253 | if (nargs >= 5) | |
254 | { | |
2f221583 | 255 | bool must_encode = 0; |
6e50da0a | 256 | Lisp_Object coding_attrs; |
30d57b8e | 257 | |
e7c1c20e | 258 | for (i = 4; i < nargs; i++) |
b7826503 | 259 | CHECK_STRING (args[i]); |
e7c1c20e | 260 | |
a2286b5c | 261 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
262 | if (STRING_MULTIBYTE (args[i])) |
263 | must_encode = 1; | |
264 | ||
beacaab3 KH |
265 | if (!NILP (Vcoding_system_for_write)) |
266 | val = Vcoding_system_for_write; | |
30d57b8e | 267 | else if (! must_encode) |
fcaf8878 | 268 | val = Qraw_text; |
beacaab3 | 269 | else |
32d08644 | 270 | { |
0065d054 | 271 | SAFE_NALLOCA (args2, 1, nargs + 1); |
32d08644 KH |
272 | args2[0] = Qcall_process; |
273 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 274 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 275 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
32d08644 | 276 | } |
fcaf8878 | 277 | val = complement_process_encoding_system (val); |
32d08644 | 278 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); |
6e50da0a KH |
279 | coding_attrs = CODING_ID_ATTRS (argument_coding.id); |
280 | if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs))) | |
281 | { | |
282 | /* We should not use an ASCII incompatible coding system. */ | |
283 | val = raw_text_coding_system (val); | |
284 | setup_coding_system (val, &argument_coding); | |
285 | } | |
32d08644 | 286 | } |
32d08644 KH |
287 | } |
288 | ||
e576cab4 JB |
289 | if (nargs >= 2 && ! NILP (args[1])) |
290 | { | |
4b4deea2 | 291 | infile = Fexpand_file_name (args[1], BVAR (current_buffer, directory)); |
b7826503 | 292 | CHECK_STRING (infile); |
e576cab4 | 293 | } |
80856e74 | 294 | else |
5437e9f9 | 295 | infile = build_string (NULL_DEVICE); |
80856e74 | 296 | |
e576cab4 JB |
297 | if (nargs >= 3) |
298 | { | |
39eaa782 RS |
299 | buffer = args[2]; |
300 | ||
1ef14cb4 LMI |
301 | /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT |
302 | FILE-FOR-STDERR), unless the first element is :file, in which case see | |
303 | the next paragraph. */ | |
19ed11ba AS |
304 | if (CONSP (buffer) |
305 | && (! SYMBOLP (XCAR (buffer)) | |
306 | || strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file"))) | |
39eaa782 | 307 | { |
70949dac | 308 | if (CONSP (XCDR (buffer))) |
45be8a1e | 309 | { |
a9d4f28a | 310 | Lisp_Object stderr_file; |
70949dac | 311 | stderr_file = XCAR (XCDR (buffer)); |
45be8a1e RS |
312 | |
313 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
314 | error_file = stderr_file; | |
315 | else | |
316 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
317 | } | |
318 | ||
70949dac | 319 | buffer = XCAR (buffer); |
39eaa782 | 320 | } |
044512ed | 321 | |
1ef14cb4 | 322 | /* If the buffer is (still) a list, it might be a (:file "file") spec. */ |
19ed11ba AS |
323 | if (CONSP (buffer) |
324 | && SYMBOLP (XCAR (buffer)) | |
325 | && ! strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file")) | |
1ef14cb4 LMI |
326 | { |
327 | output_file = Fexpand_file_name (XCAR (XCDR (buffer)), | |
328 | BVAR (current_buffer, directory)); | |
329 | CHECK_STRING (output_file); | |
330 | buffer = Qnil; | |
331 | } | |
332 | ||
39eaa782 RS |
333 | if (!(EQ (buffer, Qnil) |
334 | || EQ (buffer, Qt) | |
3ffde7d6 | 335 | || INTEGERP (buffer))) |
e576cab4 | 336 | { |
39eaa782 RS |
337 | Lisp_Object spec_buffer; |
338 | spec_buffer = buffer; | |
50fe359b | 339 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
340 | /* Mention the buffer name for a better error message. */ |
341 | if (NILP (buffer)) | |
b7826503 PJ |
342 | CHECK_BUFFER (spec_buffer); |
343 | CHECK_BUFFER (buffer); | |
e576cab4 JB |
344 | } |
345 | } | |
177c0ea7 | 346 | else |
e576cab4 | 347 | buffer = Qnil; |
80856e74 | 348 | |
58616e67 JB |
349 | /* Make sure that the child will be able to chdir to the current |
350 | buffer's current directory, or its unhandled equivalent. We | |
351 | can't just have the child check for an error when it does the | |
352 | chdir, since it's in a vfork. | |
353 | ||
354 | We have to GCPRO around this because Fexpand_file_name, | |
355 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
356 | might call a file name handling function. The argument list is | |
357 | protected by the caller, so all we really have to worry about is | |
358 | buffer. */ | |
359 | { | |
1ef14cb4 | 360 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
58616e67 | 361 | |
4b4deea2 | 362 | current_dir = BVAR (current_buffer, directory); |
58616e67 | 363 | |
1ef14cb4 | 364 | GCPRO5 (infile, buffer, current_dir, error_file, output_file); |
58616e67 | 365 | |
ca319910 SM |
366 | current_dir = Funhandled_file_name_directory (current_dir); |
367 | if (NILP (current_dir)) | |
368 | /* If the file name handler says that current_dir is unreachable, use | |
369 | a sensible default. */ | |
370 | current_dir = build_string ("~/"); | |
371 | current_dir = expand_and_dir_to_file (current_dir, Qnil); | |
db8454b0 CY |
372 | current_dir = Ffile_name_as_directory (current_dir); |
373 | ||
58616e67 JB |
374 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
375 | report_file_error ("Setting current directory", | |
4b4deea2 | 376 | Fcons (BVAR (current_buffer, directory), Qnil)); |
58616e67 | 377 | |
34b87689 KH |
378 | if (STRING_MULTIBYTE (infile)) |
379 | infile = ENCODE_FILE (infile); | |
380 | if (STRING_MULTIBYTE (current_dir)) | |
381 | current_dir = ENCODE_FILE (current_dir); | |
382 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) | |
383 | error_file = ENCODE_FILE (error_file); | |
1ef14cb4 LMI |
384 | if (STRINGP (output_file) && STRING_MULTIBYTE (output_file)) |
385 | output_file = ENCODE_FILE (output_file); | |
58616e67 JB |
386 | UNGCPRO; |
387 | } | |
388 | ||
d311d28c | 389 | display_p = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
80856e74 | 390 | |
42a5b22f | 391 | filefd = emacs_open (SSDATA (infile), O_RDONLY, 0); |
80856e74 JB |
392 | if (filefd < 0) |
393 | { | |
34b87689 | 394 | infile = DECODE_FILE (infile); |
e576cab4 | 395 | report_file_error ("Opening process input file", Fcons (infile, Qnil)); |
80856e74 | 396 | } |
1ef14cb4 LMI |
397 | |
398 | if (STRINGP (output_file)) | |
399 | { | |
400 | #ifdef DOS_NT | |
401 | fd_output = emacs_open (SSDATA (output_file), | |
402 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, | |
403 | S_IREAD | S_IWRITE); | |
404 | #else /* not DOS_NT */ | |
405 | fd_output = creat (SSDATA (output_file), 0666); | |
406 | #endif /* not DOS_NT */ | |
407 | if (fd_output < 0) | |
408 | { | |
409 | output_file = DECODE_FILE (output_file); | |
410 | report_file_error ("Opening process output file", | |
411 | Fcons (output_file, Qnil)); | |
19ed11ba | 412 | } |
1ef14cb4 | 413 | if (STRINGP (error_file) || NILP (error_file)) |
19ed11ba | 414 | output_to_buffer = 0; |
1ef14cb4 LMI |
415 | } |
416 | ||
80856e74 | 417 | /* Search for program; barf if not found. */ |
c52b0b34 | 418 | { |
ad3aaf33 | 419 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
c52b0b34 | 420 | |
ad3aaf33 | 421 | GCPRO4 (infile, buffer, current_dir, error_file); |
5c150961 | 422 | openp (Vexec_path, args[0], Vexec_suffixes, &path, make_number (X_OK)); |
c52b0b34 KH |
423 | UNGCPRO; |
424 | } | |
012c6fcb | 425 | if (NILP (path)) |
80856e74 | 426 | { |
68c45bf0 | 427 | emacs_close (filefd); |
80856e74 JB |
428 | report_file_error ("Searching for program", Fcons (args[0], Qnil)); |
429 | } | |
8ee8f447 RS |
430 | |
431 | /* If program file name starts with /: for quoting a magic name, | |
432 | discard that. */ | |
433 | if (SBYTES (path) > 2 && SREF (path, 0) == '/' | |
434 | && SREF (path, 1) == ':') | |
435 | path = Fsubstring (path, make_number (2), Qnil); | |
436 | ||
98c6f1e3 | 437 | new_argv = SAFE_ALLOCA ((nargs > 4 ? nargs - 2 : 2) * sizeof *new_argv); |
c364e618 KH |
438 | if (nargs > 4) |
439 | { | |
f66c7cf8 | 440 | ptrdiff_t i; |
ad3aaf33 | 441 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
c364e618 | 442 | |
ad3aaf33 | 443 | GCPRO5 (infile, buffer, current_dir, path, error_file); |
c5bfa12b KH |
444 | argument_coding.dst_multibyte = 0; |
445 | for (i = 4; i < nargs; i++) | |
c364e618 | 446 | { |
c5bfa12b KH |
447 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); |
448 | if (CODING_REQUIRE_ENCODING (&argument_coding)) | |
91183bfd KH |
449 | /* We must encode this argument. */ |
450 | args[i] = encode_coding_string (&argument_coding, args[i], 1); | |
c364e618 | 451 | } |
c5bfa12b | 452 | UNGCPRO; |
1aa83b22 | 453 | for (i = 4; i < nargs; i++) |
60aeceb8 | 454 | new_argv[i - 3] = SSDATA (args[i]); |
1aa83b22 | 455 | new_argv[i - 3] = 0; |
c364e618 | 456 | } |
db54baaa KH |
457 | else |
458 | new_argv[1] = 0; | |
60aeceb8 | 459 | new_argv[0] = SSDATA (path); |
80856e74 | 460 | |
7e6c2178 | 461 | #ifdef MSDOS /* MW, July 1993 */ |
7e6c2178 | 462 | |
888c9e86 EZ |
463 | /* If we're redirecting STDOUT to a file, that file is already open |
464 | on fd_output. */ | |
1ef14cb4 | 465 | if (fd_output < 0) |
7e6c2178 | 466 | { |
888c9e86 EZ |
467 | if ((outf = egetenv ("TMPDIR"))) |
468 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); | |
469 | else | |
470 | { | |
471 | tempfile = alloca (20); | |
472 | *tempfile = '\0'; | |
473 | } | |
474 | dostounix_filename (tempfile); | |
475 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') | |
476 | strcat (tempfile, "/"); | |
477 | strcat (tempfile, "detmp.XXX"); | |
478 | mktemp (tempfile); | |
1ef14cb4 LMI |
479 | outfilefd = creat (tempfile, S_IREAD | S_IWRITE); |
480 | if (outfilefd < 0) { | |
481 | emacs_close (filefd); | |
482 | report_file_error ("Opening process output file", | |
483 | Fcons (build_string (tempfile), Qnil)); | |
484 | } | |
7e6c2178 | 485 | } |
1ef14cb4 LMI |
486 | else |
487 | outfilefd = fd_output; | |
60aeceb8 PE |
488 | fd0 = filefd; |
489 | fd1 = outfilefd; | |
6f89d28a | 490 | #endif /* MSDOS */ |
7e6c2178 | 491 | |
d50d3dc8 | 492 | if (INTEGERP (buffer)) |
60aeceb8 PE |
493 | { |
494 | fd0 = -1; | |
495 | fd1 = emacs_open (NULL_DEVICE, O_WRONLY, 0); | |
496 | } | |
80856e74 JB |
497 | else |
498 | { | |
7e6c2178 | 499 | #ifndef MSDOS |
60aeceb8 | 500 | int fd[2]; |
db92b288 GM |
501 | if (pipe (fd) == -1) |
502 | { | |
60aeceb8 | 503 | int pipe_errno = errno; |
db92b288 | 504 | emacs_close (filefd); |
60aeceb8 | 505 | errno = pipe_errno; |
db92b288 GM |
506 | report_file_error ("Creating process pipe", Qnil); |
507 | } | |
60aeceb8 PE |
508 | fd0 = fd[0]; |
509 | fd1 = fd[1]; | |
80856e74 JB |
510 | #endif |
511 | } | |
512 | ||
513 | { | |
39eaa782 | 514 | int fd_error = fd1; |
80856e74 | 515 | |
1ef14cb4 LMI |
516 | if (fd_output >= 0) |
517 | fd1 = fd_output; | |
80856e74 | 518 | |
39eaa782 | 519 | if (NILP (error_file)) |
68c45bf0 | 520 | fd_error = emacs_open (NULL_DEVICE, O_WRONLY, 0); |
39eaa782 RS |
521 | else if (STRINGP (error_file)) |
522 | { | |
523 | #ifdef DOS_NT | |
42a5b22f | 524 | fd_error = emacs_open (SSDATA (error_file), |
68c45bf0 PE |
525 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, |
526 | S_IREAD | S_IWRITE); | |
39eaa782 | 527 | #else /* not DOS_NT */ |
42a5b22f | 528 | fd_error = creat (SSDATA (error_file), 0666); |
39eaa782 RS |
529 | #endif /* not DOS_NT */ |
530 | } | |
531 | ||
532 | if (fd_error < 0) | |
533 | { | |
68c45bf0 | 534 | emacs_close (filefd); |
60aeceb8 PE |
535 | if (fd0 != filefd) |
536 | emacs_close (fd0); | |
39eaa782 | 537 | if (fd1 >= 0) |
68c45bf0 | 538 | emacs_close (fd1); |
6f89d28a MB |
539 | #ifdef MSDOS |
540 | unlink (tempfile); | |
541 | #endif | |
34b87689 KH |
542 | if (NILP (error_file)) |
543 | error_file = build_string (NULL_DEVICE); | |
544 | else if (STRINGP (error_file)) | |
545 | error_file = DECODE_FILE (error_file); | |
546 | report_file_error ("Cannot redirect stderr", Fcons (error_file, Qnil)); | |
39eaa782 | 547 | } |
89e1ec1d | 548 | |
2610078a | 549 | #ifdef MSDOS /* MW, July 1993 */ |
c17c4250 | 550 | /* Note that on MSDOS `child_setup' actually returns the child process |
bb5f74ee | 551 | exit status, not its PID, so assign it to status below. */ |
60aeceb8 | 552 | pid = child_setup (filefd, outfilefd, fd_error, new_argv, 0, current_dir); |
bb5f74ee | 553 | child_errno = errno; |
2610078a | 554 | |
68c45bf0 | 555 | emacs_close (outfilefd); |
2610078a | 556 | if (fd_error != outfilefd) |
68c45bf0 | 557 | emacs_close (fd_error); |
bb5f74ee PE |
558 | if (pid < 0) |
559 | { | |
560 | synchronize_system_messages_locale (); | |
561 | return | |
562 | code_convert_string_norecord (build_string (strerror (child_errno)), | |
563 | Vlocale_coding_system, 0); | |
564 | } | |
565 | status = pid; | |
2610078a | 566 | fd1 = -1; /* No harm in closing that one! */ |
888c9e86 | 567 | if (tempfile) |
2610078a | 568 | { |
888c9e86 EZ |
569 | /* Since CRLF is converted to LF within `decode_coding', we |
570 | can always open a file with binary mode. */ | |
60aeceb8 PE |
571 | fd0 = emacs_open (tempfile, O_RDONLY | O_BINARY, 0); |
572 | if (fd0 < 0) | |
888c9e86 EZ |
573 | { |
574 | unlink (tempfile); | |
575 | emacs_close (filefd); | |
576 | report_file_error ("Cannot re-open temporary file", | |
7285dc67 | 577 | Fcons (build_string (tempfile), Qnil)); |
888c9e86 | 578 | } |
2610078a | 579 | } |
888c9e86 | 580 | else |
60aeceb8 | 581 | fd0 = -1; /* We are not going to read from tempfile. */ |
644d3f0d | 582 | #endif /* MSDOS */ |
bb5f74ee PE |
583 | |
584 | /* Do the unwind-protect now, even though the pid is not known, so | |
585 | that no storage allocation is done in the critical section. | |
586 | The actual PID will be filled in during the critical section. */ | |
587 | synch_process_pid = 0; | |
588 | synch_process_fd = fd0; | |
644d3f0d PE |
589 | |
590 | #ifdef MSDOS | |
591 | /* MSDOS needs different cleanup information. */ | |
592 | record_unwind_protect (call_process_cleanup, | |
593 | Fcons (Fcurrent_buffer (), | |
594 | build_string (tempfile ? tempfile : ""))); | |
595 | #else | |
bb5f74ee PE |
596 | record_unwind_protect (call_process_cleanup, Fcurrent_buffer ()); |
597 | ||
598 | block_input (); | |
599 | block_child_signal (); | |
600 | ||
bad95d8f | 601 | #ifdef WINDOWSNT |
60aeceb8 | 602 | pid = child_setup (filefd, fd1, fd_error, new_argv, 0, current_dir); |
bad95d8f | 603 | #else /* not WINDOWSNT */ |
c0ad4ea5 | 604 | |
db6c0e74 | 605 | /* vfork, and prevent local vars from being clobbered by the vfork. */ |
b08a63cc | 606 | { |
c74e9d86 PE |
607 | Lisp_Object volatile buffer_volatile = buffer; |
608 | Lisp_Object volatile coding_systems_volatile = coding_systems; | |
609 | Lisp_Object volatile current_dir_volatile = current_dir; | |
2f221583 PE |
610 | bool volatile display_p_volatile = display_p; |
611 | bool volatile output_to_buffer_volatile = output_to_buffer; | |
612 | bool volatile sa_must_free_volatile = sa_must_free; | |
5266b4bb | 613 | int volatile fd1_volatile = fd1; |
db6c0e74 PE |
614 | int volatile fd_error_volatile = fd_error; |
615 | int volatile fd_output_volatile = fd_output; | |
60aeceb8 PE |
616 | int volatile filefd_volatile = filefd; |
617 | ptrdiff_t volatile count_volatile = count; | |
d311d28c | 618 | ptrdiff_t volatile sa_count_volatile = sa_count; |
60aeceb8 | 619 | char **volatile new_argv_volatile = new_argv; |
80856e74 | 620 | |
db6c0e74 | 621 | pid = vfork (); |
bb5f74ee | 622 | child_errno = errno; |
80856e74 | 623 | |
c74e9d86 PE |
624 | buffer = buffer_volatile; |
625 | coding_systems = coding_systems_volatile; | |
626 | current_dir = current_dir_volatile; | |
d311d28c | 627 | display_p = display_p_volatile; |
60aeceb8 PE |
628 | output_to_buffer = output_to_buffer_volatile; |
629 | sa_must_free = sa_must_free_volatile; | |
5266b4bb | 630 | fd1 = fd1_volatile; |
db6c0e74 PE |
631 | fd_error = fd_error_volatile; |
632 | fd_output = fd_output_volatile; | |
60aeceb8 PE |
633 | filefd = filefd_volatile; |
634 | count = count_volatile; | |
d311d28c | 635 | sa_count = sa_count_volatile; |
db6c0e74 | 636 | new_argv = new_argv_volatile; |
644d3f0d PE |
637 | |
638 | fd0 = synch_process_fd; | |
db6c0e74 | 639 | } |
b9c7f648 | 640 | |
80856e74 JB |
641 | if (pid == 0) |
642 | { | |
bb5f74ee PE |
643 | unblock_child_signal (); |
644 | ||
60aeceb8 PE |
645 | if (fd0 >= 0) |
646 | emacs_close (fd0); | |
322aea6d | 647 | |
19ed11ba | 648 | setsid (); |
c0ad4ea5 | 649 | |
4d7e6e51 | 650 | /* Emacs ignores SIGPIPE, but the child should not. */ |
2f9b9adb | 651 | signal (SIGPIPE, SIG_DFL); |
c0ad4ea5 | 652 | |
60aeceb8 | 653 | child_setup (filefd, fd1, fd_error, new_argv, 0, current_dir); |
80856e74 | 654 | } |
aba637ec | 655 | |
bad95d8f | 656 | #endif /* not WINDOWSNT */ |
cd5f8f60 | 657 | |
bb5f74ee PE |
658 | child_errno = errno; |
659 | ||
660 | if (0 < pid) | |
661 | { | |
662 | if (INTEGERP (buffer)) | |
663 | record_deleted_pid (pid); | |
664 | else | |
665 | synch_process_pid = pid; | |
666 | } | |
667 | ||
668 | unblock_child_signal (); | |
669 | unblock_input (); | |
670 | ||
cd5f8f60 RS |
671 | /* The MSDOS case did this already. */ |
672 | if (fd_error >= 0) | |
68c45bf0 | 673 | emacs_close (fd_error); |
2610078a | 674 | #endif /* not MSDOS */ |
80856e74 | 675 | |
60aeceb8 | 676 | /* Close most of our file descriptors, but not fd0 |
6b6e798b | 677 | since we will use that to read input from. */ |
68c45bf0 | 678 | emacs_close (filefd); |
1ef14cb4 LMI |
679 | if (fd_output >= 0) |
680 | emacs_close (fd_output); | |
799abb26 | 681 | if (fd1 >= 0 && fd1 != fd_error) |
68c45bf0 | 682 | emacs_close (fd1); |
80856e74 JB |
683 | } |
684 | ||
685 | if (pid < 0) | |
686 | { | |
bb5f74ee | 687 | errno = child_errno; |
80856e74 JB |
688 | report_file_error ("Doing vfork", Qnil); |
689 | } | |
690 | ||
d50d3dc8 | 691 | if (INTEGERP (buffer)) |
644d3f0d | 692 | return unbind_to (count, Qnil); |
80856e74 | 693 | |
d50d3dc8 | 694 | if (BUFFERP (buffer)) |
80856e74 JB |
695 | Fset_buffer (buffer); |
696 | ||
09494912 RS |
697 | if (NILP (buffer)) |
698 | { | |
699 | /* If BUFFER is nil, we must read process output once and then | |
700 | discard it, so setup coding system but with nil. */ | |
701 | setup_coding_system (Qnil, &process_coding); | |
659afede | 702 | process_coding.dst_multibyte = 0; |
09494912 RS |
703 | } |
704 | else | |
705 | { | |
706 | Lisp_Object val, *args2; | |
707 | ||
708 | val = Qnil; | |
709 | if (!NILP (Vcoding_system_for_read)) | |
710 | val = Vcoding_system_for_read; | |
711 | else | |
712 | { | |
713 | if (EQ (coding_systems, Qt)) | |
714 | { | |
f66c7cf8 | 715 | ptrdiff_t i; |
09494912 | 716 | |
0065d054 | 717 | SAFE_NALLOCA (args2, 1, nargs + 1); |
09494912 RS |
718 | args2[0] = Qcall_process; |
719 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
720 | coding_systems | |
721 | = Ffind_operation_coding_system (nargs + 1, args2); | |
722 | } | |
723 | if (CONSP (coding_systems)) | |
70949dac | 724 | val = XCAR (coding_systems); |
09494912 | 725 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 726 | val = XCAR (Vdefault_process_coding_system); |
09494912 RS |
727 | else |
728 | val = Qnil; | |
729 | } | |
91183bfd | 730 | Fcheck_coding_system (val); |
09494912 RS |
731 | /* In unibyte mode, character code conversion should not take |
732 | place but EOL conversion should. So, setup raw-text or one | |
733 | of the subsidiary according to the information just setup. */ | |
4b4deea2 | 734 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
09494912 | 735 | && !NILP (val)) |
91183bfd KH |
736 | val = raw_text_coding_system (val); |
737 | setup_coding_system (val, &process_coding); | |
659afede KH |
738 | process_coding.dst_multibyte |
739 | = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); | |
09494912 | 740 | } |
a0241d01 | 741 | process_coding.src_multibyte = 0; |
09494912 | 742 | |
80856e74 JB |
743 | immediate_quit = 1; |
744 | QUIT; | |
745 | ||
1ef14cb4 | 746 | if (output_to_buffer) |
19ed11ba | 747 | { |
60aeceb8 PE |
748 | enum { CALLPROC_BUFFER_SIZE_MIN = 16 * 1024 }; |
749 | enum { CALLPROC_BUFFER_SIZE_MAX = 4 * CALLPROC_BUFFER_SIZE_MIN }; | |
750 | char buf[CALLPROC_BUFFER_SIZE_MAX]; | |
751 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; | |
2f221583 PE |
752 | int nread; |
753 | bool first = 1; | |
19ed11ba AS |
754 | EMACS_INT total_read = 0; |
755 | int carryover = 0; | |
2f221583 | 756 | bool display_on_the_fly = display_p; |
19ed11ba AS |
757 | struct coding_system saved_coding; |
758 | ||
759 | saved_coding = process_coding; | |
760 | while (1) | |
761 | { | |
762 | /* Repeatedly read until we've filled as much as possible | |
763 | of the buffer size we have. But don't read | |
764 | less than 1024--save that for the next bufferful. */ | |
765 | nread = carryover; | |
766 | while (nread < bufsize - 1024) | |
767 | { | |
60aeceb8 | 768 | int this_read = emacs_read (fd0, buf + nread, |
19ed11ba | 769 | bufsize - nread); |
60558b19 | 770 | |
19ed11ba AS |
771 | if (this_read < 0) |
772 | goto give_up; | |
60558b19 | 773 | |
19ed11ba AS |
774 | if (this_read == 0) |
775 | { | |
776 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
777 | break; | |
778 | } | |
60558b19 | 779 | |
19ed11ba AS |
780 | nread += this_read; |
781 | total_read += this_read; | |
60558b19 | 782 | |
19ed11ba AS |
783 | if (display_on_the_fly) |
784 | break; | |
785 | } | |
60558b19 | 786 | |
19ed11ba AS |
787 | /* Now NREAD is the total amount of data in the buffer. */ |
788 | immediate_quit = 0; | |
177c0ea7 | 789 | |
19ed11ba AS |
790 | if (!NILP (buffer)) |
791 | { | |
792 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) | |
793 | && ! CODING_MAY_REQUIRE_DECODING (&process_coding)) | |
794 | insert_1_both (buf, nread, nread, 0, 1, 0); | |
795 | else | |
796 | { /* We have to decode the input. */ | |
797 | Lisp_Object curbuf; | |
d311d28c | 798 | ptrdiff_t count1 = SPECPDL_INDEX (); |
19ed11ba AS |
799 | |
800 | XSETBUFFER (curbuf, current_buffer); | |
801 | /* We cannot allow after-change-functions be run | |
802 | during decoding, because that might modify the | |
803 | buffer, while we rely on process_coding.produced to | |
804 | faithfully reflect inserted text until we | |
805 | TEMP_SET_PT_BOTH below. */ | |
806 | specbind (Qinhibit_modification_hooks, Qt); | |
807 | decode_coding_c_string (&process_coding, | |
808 | (unsigned char *) buf, nread, curbuf); | |
809 | unbind_to (count1, Qnil); | |
810 | if (display_on_the_fly | |
811 | && CODING_REQUIRE_DETECTION (&saved_coding) | |
812 | && ! CODING_REQUIRE_DETECTION (&process_coding)) | |
813 | { | |
814 | /* We have detected some coding system. But, | |
815 | there's a possibility that the detection was | |
816 | done by insufficient data. So, we give up | |
817 | displaying on the fly. */ | |
818 | if (process_coding.produced > 0) | |
819 | del_range_2 (process_coding.dst_pos, | |
820 | process_coding.dst_pos_byte, | |
821 | process_coding.dst_pos | |
822 | + process_coding.produced_char, | |
823 | process_coding.dst_pos_byte | |
824 | + process_coding.produced, 0); | |
825 | display_on_the_fly = 0; | |
826 | process_coding = saved_coding; | |
827 | carryover = nread; | |
828 | /* This is to make the above condition always | |
829 | fails in the future. */ | |
830 | saved_coding.common_flags | |
831 | &= ~CODING_REQUIRE_DETECTION_MASK; | |
832 | continue; | |
833 | } | |
834 | ||
835 | TEMP_SET_PT_BOTH (PT + process_coding.produced_char, | |
836 | PT_BYTE + process_coding.produced); | |
837 | carryover = process_coding.carryover_bytes; | |
838 | if (carryover > 0) | |
839 | memcpy (buf, process_coding.carryover, | |
840 | process_coding.carryover_bytes); | |
841 | } | |
842 | } | |
c5bfa12b | 843 | |
19ed11ba AS |
844 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
845 | break; | |
6e3bfbb2 | 846 | |
19ed11ba AS |
847 | /* Make the buffer bigger as we continue to read more data, |
848 | but not past CALLPROC_BUFFER_SIZE_MAX. */ | |
849 | if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) | |
850 | if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) | |
851 | bufsize = CALLPROC_BUFFER_SIZE_MAX; | |
6e3bfbb2 | 852 | |
19ed11ba AS |
853 | if (display_p) |
854 | { | |
855 | if (first) | |
856 | prepare_menu_bars (); | |
857 | first = 0; | |
858 | redisplay_preserve_echo_area (1); | |
859 | /* This variable might have been set to 0 for code | |
860 | detection. In that case, we set it back to 1 because | |
861 | we should have already detected a coding system. */ | |
862 | display_on_the_fly = 1; | |
863 | } | |
864 | immediate_quit = 1; | |
865 | QUIT; | |
866 | } | |
867 | give_up: ; | |
868 | ||
869 | Vlast_coding_system_used = CODING_ID_NAME (process_coding.id); | |
870 | /* If the caller required, let the buffer inherit the | |
871 | coding-system used to decode the process output. */ | |
872 | if (inherit_process_coding_system) | |
873 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
874 | make_number (total_read)); | |
875 | } | |
3b440bb5 | 876 | |
77defa9a | 877 | #ifndef MSDOS |
80856e74 | 878 | /* Wait for it to terminate, unless it already has. */ |
bb5f74ee | 879 | wait_for_termination (pid, &status, !output_to_buffer); |
77defa9a | 880 | #endif |
80856e74 JB |
881 | |
882 | immediate_quit = 0; | |
883 | ||
37d54121 RS |
884 | /* Don't kill any children that the subprocess may have left behind |
885 | when exiting. */ | |
bb5f74ee | 886 | synch_process_pid = 0; |
37d54121 | 887 | |
3c59b4c9 | 888 | SAFE_FREE (); |
80856e74 JB |
889 | unbind_to (count, Qnil); |
890 | ||
bb5f74ee | 891 | if (WIFSIGNALED (status)) |
6b61353c | 892 | { |
42ca4633 | 893 | const char *signame; |
6b61353c KH |
894 | |
895 | synchronize_system_messages_locale (); | |
bb5f74ee | 896 | signame = strsignal (WTERMSIG (status)); |
6b61353c KH |
897 | |
898 | if (signame == 0) | |
19ed11ba | 899 | signame = "unknown"; |
6b61353c | 900 | |
bb5f74ee PE |
901 | return code_convert_string_norecord (build_string (signame), |
902 | Vlocale_coding_system, 0); | |
6b61353c KH |
903 | } |
904 | ||
bb5f74ee PE |
905 | eassert (WIFEXITED (status)); |
906 | return make_number (WEXITSTATUS (status)); | |
80856e74 | 907 | } |
80856e74 | 908 | \f |
9fefd2ba | 909 | static Lisp_Object |
971de7fb | 910 | delete_temp_file (Lisp_Object name) |
80856e74 | 911 | { |
1a271e14 | 912 | /* Suppress jka-compr handling, etc. */ |
d311d28c | 913 | ptrdiff_t count = SPECPDL_INDEX (); |
1a271e14 | 914 | specbind (intern ("file-name-handler-alist"), Qnil); |
f1a5d776 | 915 | internal_delete_file (name); |
1a271e14 | 916 | unbind_to (count, Qnil); |
320695d8 | 917 | return Qnil; |
80856e74 JB |
918 | } |
919 | ||
920 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
fdb82f93 PJ |
921 | 3, MANY, 0, |
922 | doc: /* Send text from START to END to a synchronous process running PROGRAM. | |
923 | The remaining arguments are optional. | |
924 | Delete the text if fourth arg DELETE is non-nil. | |
925 | ||
1ef14cb4 LMI |
926 | Insert output in BUFFER before point; t means current buffer; nil for |
927 | BUFFER means discard it; 0 means discard and don't wait; and `(:file | |
928 | FILE)', where FILE is a file name string, means that it should be | |
1b9f60cc | 929 | written to that file (if the file already exists it is overwritten). |
fdb82f93 PJ |
930 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
931 | REAL-BUFFER says what to do with standard output, as above, | |
932 | while STDERR-FILE says what to do with standard error in the child. | |
933 | STDERR-FILE may be nil (discard standard error output), | |
934 | t (mix it with ordinary output), or a file name string. | |
935 | ||
936 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
937 | Remaining args are passed to PROGRAM at startup as command args. | |
938 | ||
ba9a5174 | 939 | If BUFFER is 0, `call-process-region' returns immediately with value nil. |
fdb82f93 PJ |
940 | Otherwise it waits for PROGRAM to terminate |
941 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
942 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
943 | ||
944 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) | |
f66c7cf8 | 945 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 946 | { |
39323a7e KH |
947 | struct gcpro gcpro1; |
948 | Lisp_Object filename_string; | |
949 | register Lisp_Object start, end; | |
d311d28c | 950 | ptrdiff_t count = SPECPDL_INDEX (); |
08ee4e87 | 951 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
09494912 | 952 | Lisp_Object coding_systems; |
32d08644 | 953 | Lisp_Object val, *args2; |
f66c7cf8 | 954 | ptrdiff_t i; |
98c6f1e3 | 955 | Lisp_Object tmpdir; |
7e6c2178 | 956 | |
f92d51d8 CY |
957 | if (STRINGP (Vtemporary_file_directory)) |
958 | tmpdir = Vtemporary_file_directory; | |
7e6c2178 RS |
959 | else |
960 | { | |
f92d51d8 CY |
961 | #ifndef DOS_NT |
962 | if (getenv ("TMPDIR")) | |
963 | tmpdir = build_string (getenv ("TMPDIR")); | |
964 | else | |
965 | tmpdir = build_string ("/tmp/"); | |
966 | #else /* DOS_NT */ | |
967 | char *outf; | |
968 | if ((outf = egetenv ("TMPDIR")) | |
969 | || (outf = egetenv ("TMP")) | |
970 | || (outf = egetenv ("TEMP"))) | |
971 | tmpdir = build_string (outf); | |
972 | else | |
973 | tmpdir = Ffile_name_as_directory (build_string ("c:/temp")); | |
0774fcf8 | 974 | #endif |
f92d51d8 | 975 | } |
7e6c2178 | 976 | |
3c59b4c9 PE |
977 | { |
978 | USE_SAFE_ALLOCA; | |
98c6f1e3 | 979 | Lisp_Object pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir); |
7c2fcf9b EZ |
980 | Lisp_Object encoded_tem = ENCODE_FILE (pattern); |
981 | char *tempfile = SAFE_ALLOCA (SBYTES (encoded_tem) + 1); | |
982 | memcpy (tempfile, SDATA (encoded_tem), SBYTES (encoded_tem) + 1); | |
3c59b4c9 | 983 | coding_systems = Qt; |
09494912 | 984 | |
1ddc85a4 | 985 | #ifdef HAVE_MKSTEMP |
3c59b4c9 PE |
986 | { |
987 | int fd; | |
988 | ||
4d7e6e51 | 989 | block_input (); |
3c59b4c9 | 990 | fd = mkstemp (tempfile); |
4d7e6e51 | 991 | unblock_input (); |
3c59b4c9 PE |
992 | if (fd == -1) |
993 | report_file_error ("Failed to open temporary file", | |
baac5bc7 | 994 | Fcons (build_string (tempfile), Qnil)); |
3c59b4c9 PE |
995 | else |
996 | close (fd); | |
997 | } | |
1ddc85a4 | 998 | #else |
d3cefd13 | 999 | errno = 0; |
3c59b4c9 | 1000 | mktemp (tempfile); |
d3cefd13 EZ |
1001 | if (!*tempfile) |
1002 | { | |
1003 | if (!errno) | |
1004 | errno = EEXIST; | |
1005 | report_file_error ("Failed to open temporary file using pattern", | |
1006 | Fcons (pattern, Qnil)); | |
1007 | } | |
1ddc85a4 | 1008 | #endif |
80856e74 | 1009 | |
3c59b4c9 PE |
1010 | filename_string = build_string (tempfile); |
1011 | GCPRO1 (filename_string); | |
1012 | SAFE_FREE (); | |
1013 | } | |
1014 | ||
80856e74 JB |
1015 | start = args[0]; |
1016 | end = args[1]; | |
32d08644 | 1017 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
1018 | if (!NILP (Vcoding_system_for_write)) |
1019 | val = Vcoding_system_for_write; | |
4b4deea2 | 1020 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
fcaf8878 | 1021 | val = Qraw_text; |
32d08644 | 1022 | else |
beacaab3 | 1023 | { |
3c59b4c9 | 1024 | USE_SAFE_ALLOCA; |
0065d054 | 1025 | SAFE_NALLOCA (args2, 1, nargs + 1); |
91489411 RS |
1026 | args2[0] = Qcall_process_region; |
1027 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1028 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); | |
fcaf8878 | 1029 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
3c59b4c9 | 1030 | SAFE_FREE (); |
beacaab3 | 1031 | } |
fcaf8878 | 1032 | val = complement_process_encoding_system (val); |
32d08644 | 1033 | |
168afdaa | 1034 | { |
d311d28c | 1035 | ptrdiff_t count1 = SPECPDL_INDEX (); |
168afdaa RS |
1036 | |
1037 | specbind (intern ("coding-system-for-write"), val); | |
bb951f0e KR |
1038 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
1039 | happen to get a ".Z" suffix. */ | |
1040 | specbind (intern ("file-name-handler-alist"), Qnil); | |
168afdaa RS |
1041 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil); |
1042 | ||
1043 | unbind_to (count1, Qnil); | |
1044 | } | |
91489411 | 1045 | |
177c0ea7 | 1046 | /* Note that Fcall_process takes care of binding |
91489411 | 1047 | coding-system-for-read. */ |
093650fe | 1048 | |
80856e74 JB |
1049 | record_unwind_protect (delete_temp_file, filename_string); |
1050 | ||
edf496dd | 1051 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
1052 | Fdelete_region (start, end); |
1053 | ||
edf496dd KH |
1054 | if (nargs > 3) |
1055 | { | |
1056 | args += 2; | |
1057 | nargs -= 2; | |
1058 | } | |
1059 | else | |
1060 | { | |
1061 | args[0] = args[2]; | |
1062 | nargs = 2; | |
1063 | } | |
1064 | args[1] = filename_string; | |
80856e74 | 1065 | |
edf496dd | 1066 | RETURN_UNGCPRO (unbind_to (count, Fcall_process (nargs, args))); |
80856e74 JB |
1067 | } |
1068 | \f | |
361358ea | 1069 | #ifndef WINDOWSNT |
971de7fb | 1070 | static int relocate_fd (int fd, int minfd); |
361358ea | 1071 | #endif |
dfcf069d | 1072 | |
5990851d KL |
1073 | static char ** |
1074 | add_env (char **env, char **new_env, char *string) | |
1075 | { | |
1076 | char **ep; | |
2f221583 | 1077 | bool ok = 1; |
5990851d KL |
1078 | if (string == NULL) |
1079 | return new_env; | |
1080 | ||
1081 | /* See if this string duplicates any string already in the env. | |
1082 | If so, don't put it in. | |
1083 | When an env var has multiple definitions, | |
1084 | we keep the definition that comes first in process-environment. */ | |
1085 | for (ep = env; ok && ep != new_env; ep++) | |
1086 | { | |
1087 | char *p = *ep, *q = string; | |
1088 | while (ok) | |
19ed11ba AS |
1089 | { |
1090 | if (*q != *p) | |
1091 | break; | |
1092 | if (*q == 0) | |
1093 | /* The string is a lone variable name; keep it for now, we | |
1094 | will remove it later. It is a placeholder for a | |
1095 | variable that is not to be included in the environment. */ | |
1096 | break; | |
1097 | if (*q == '=') | |
1098 | ok = 0; | |
1099 | p++, q++; | |
1100 | } | |
5990851d KL |
1101 | } |
1102 | if (ok) | |
1103 | *new_env++ = string; | |
1104 | return new_env; | |
1105 | } | |
1106 | ||
80856e74 JB |
1107 | /* This is the last thing run in a newly forked inferior |
1108 | either synchronous or asynchronous. | |
1109 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
1110 | Initialize inferior's priority, pgrp, connected dir and environment. | |
1111 | then exec another program based on new_argv. | |
1112 | ||
2f221583 | 1113 | If SET_PGRP, put the subprocess into a separate process group. |
e576cab4 JB |
1114 | |
1115 | CURRENT_DIR is an elisp string giving the path of the current | |
1116 | directory the subprocess should have. Since we can't really signal | |
1117 | a decent error from within the child, this should be verified as an | |
1118 | executable directory by the parent. */ | |
80856e74 | 1119 | |
dfcf069d | 1120 | int |
2f221583 PE |
1121 | child_setup (int in, int out, int err, char **new_argv, bool set_pgrp, |
1122 | Lisp_Object current_dir) | |
80856e74 | 1123 | { |
e576cab4 | 1124 | char **env; |
7fcf7f05 | 1125 | char *pwd_var; |
bad95d8f RS |
1126 | #ifdef WINDOWSNT |
1127 | int cpid; | |
4252a4bd | 1128 | HANDLE handles[3]; |
bad95d8f | 1129 | #endif /* WINDOWSNT */ |
e576cab4 | 1130 | |
d311d28c | 1131 | pid_t pid = getpid (); |
80856e74 | 1132 | |
80856e74 JB |
1133 | /* Close Emacs's descriptors that this process should not have. */ |
1134 | close_process_descs (); | |
ded80a25 | 1135 | |
c17c4250 EZ |
1136 | /* DOS_NT isn't in a vfork, so if we are in the middle of load-file, |
1137 | we will lose if we call close_load_descs here. */ | |
1138 | #ifndef DOS_NT | |
4458cebe | 1139 | close_load_descs (); |
c17c4250 | 1140 | #endif |
80856e74 JB |
1141 | |
1142 | /* Note that use of alloca is always safe here. It's obvious for systems | |
1143 | that do not have true vfork or that have true (stack) alloca. | |
caa01fe0 GM |
1144 | If using vfork and C_ALLOCA (when Emacs used to include |
1145 | src/alloca.c) it is safe because that changes the superior's | |
1146 | static variables as if the superior had done alloca and will be | |
1147 | cleaned up in the usual way. */ | |
e576cab4 | 1148 | { |
7fcf7f05 | 1149 | register char *temp; |
0065d054 | 1150 | size_t i; /* size_t, because ptrdiff_t might overflow here! */ |
77d78be1 | 1151 | |
d5db4077 | 1152 | i = SBYTES (current_dir); |
16425c4a EZ |
1153 | #ifdef MSDOS |
1154 | /* MSDOS must have all environment variables malloc'ed, because | |
1155 | low-level libc functions that launch subsidiary processes rely | |
1156 | on that. */ | |
23f86fce | 1157 | pwd_var = xmalloc (i + 6); |
16425c4a | 1158 | #else |
38182d90 | 1159 | pwd_var = alloca (i + 6); |
16425c4a | 1160 | #endif |
7fcf7f05 | 1161 | temp = pwd_var + 4; |
72af86bd AS |
1162 | memcpy (pwd_var, "PWD=", 4); |
1163 | memcpy (temp, SDATA (current_dir), i); | |
bad95d8f | 1164 | if (!IS_DIRECTORY_SEP (temp[i - 1])) temp[i++] = DIRECTORY_SEP; |
e576cab4 JB |
1165 | temp[i] = 0; |
1166 | ||
c17c4250 | 1167 | #ifndef DOS_NT |
e576cab4 JB |
1168 | /* We can't signal an Elisp error here; we're in a vfork. Since |
1169 | the callers check the current directory before forking, this | |
1170 | should only return an error if the directory's permissions | |
1171 | are changed between the check and this chdir, but we should | |
1172 | at least check. */ | |
1173 | if (chdir (temp) < 0) | |
20b25e46 | 1174 | _exit (errno); |
f8d23104 | 1175 | #else /* DOS_NT */ |
c17c4250 EZ |
1176 | /* Get past the drive letter, so that d:/ is left alone. */ |
1177 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
1178 | { | |
1179 | temp += 2; | |
1180 | i -= 2; | |
1181 | } | |
f8d23104 | 1182 | #endif /* DOS_NT */ |
c17c4250 | 1183 | |
7fcf7f05 | 1184 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 1185 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 1186 | temp[--i] = 0; |
e576cab4 | 1187 | } |
80856e74 | 1188 | |
5990851d | 1189 | /* Set `env' to a vector of the strings in the environment. */ |
80856e74 JB |
1190 | { |
1191 | register Lisp_Object tem; | |
1192 | register char **new_env; | |
5990851d | 1193 | char **p, **q; |
80856e74 | 1194 | register int new_length; |
d2bb6598 | 1195 | Lisp_Object display = Qnil; |
361358ea | 1196 | |
80856e74 | 1197 | new_length = 0; |
f105f403 | 1198 | |
80856e74 | 1199 | for (tem = Vprocess_environment; |
19ed11ba AS |
1200 | CONSP (tem) && STRINGP (XCAR (tem)); |
1201 | tem = XCDR (tem)) | |
d2bb6598 | 1202 | { |
42a5b22f | 1203 | if (strncmp (SSDATA (XCAR (tem)), "DISPLAY", 7) == 0 |
d2bb6598 SM |
1204 | && (SDATA (XCAR (tem)) [7] == '\0' |
1205 | || SDATA (XCAR (tem)) [7] == '=')) | |
1206 | /* DISPLAY is specified in process-environment. */ | |
1207 | display = Qt; | |
1208 | new_length++; | |
1209 | } | |
de87fb59 | 1210 | |
d2bb6598 SM |
1211 | /* If not provided yet, use the frame's DISPLAY. */ |
1212 | if (NILP (display)) | |
1213 | { | |
1214 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); | |
1215 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) | |
1216 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1217 | tmp = Fgetenv_internal (build_string ("DISPLAY"), | |
1218 | Vinitial_environment); | |
1219 | if (STRINGP (tmp)) | |
1220 | { | |
1221 | display = tmp; | |
1222 | new_length++; | |
1223 | } | |
1224 | } | |
80856e74 | 1225 | |
7fcf7f05 | 1226 | /* new_length + 2 to include PWD and terminating 0. */ |
38182d90 | 1227 | env = new_env = alloca ((new_length + 2) * sizeof *env); |
7fcf7f05 RS |
1228 | /* If we have a PWD envvar, pass one down, |
1229 | but with corrected value. */ | |
a13f8f50 | 1230 | if (egetenv ("PWD")) |
7fcf7f05 | 1231 | *new_env++ = pwd_var; |
361358ea | 1232 | |
6b8e474c | 1233 | if (STRINGP (display)) |
de87fb59 | 1234 | { |
38182d90 | 1235 | char *vdata = alloca (sizeof "DISPLAY=" + SBYTES (display)); |
de87fb59 | 1236 | strcpy (vdata, "DISPLAY="); |
42a5b22f | 1237 | strcat (vdata, SSDATA (display)); |
de87fb59 DN |
1238 | new_env = add_env (env, new_env, vdata); |
1239 | } | |
80856e74 | 1240 | |
5990851d | 1241 | /* Overrides. */ |
80856e74 | 1242 | for (tem = Vprocess_environment; |
70949dac KR |
1243 | CONSP (tem) && STRINGP (XCAR (tem)); |
1244 | tem = XCDR (tem)) | |
42a5b22f | 1245 | new_env = add_env (env, new_env, SSDATA (XCAR (tem))); |
d2bb6598 | 1246 | |
5990851d KL |
1247 | *new_env = 0; |
1248 | ||
1249 | /* Remove variable names without values. */ | |
1250 | p = q = env; | |
1251 | while (*p != 0) | |
cd9565ba | 1252 | { |
19ed11ba AS |
1253 | while (*q != 0 && strchr (*q, '=') == NULL) |
1254 | q++; | |
1255 | *p = *q++; | |
1256 | if (*p != 0) | |
1257 | p++; | |
cd9565ba | 1258 | } |
80856e74 | 1259 | } |
de87fb59 | 1260 | |
361358ea | 1261 | |
bad95d8f RS |
1262 | #ifdef WINDOWSNT |
1263 | prepare_standard_handles (in, out, err, handles); | |
d5db4077 | 1264 | set_process_dir (SDATA (current_dir)); |
67802943 DN |
1265 | /* Spawn the child. (See ntproc.c:Spawnve). */ |
1266 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); | |
1267 | reset_standard_handles (in, out, err, handles); | |
1268 | if (cpid == -1) | |
1269 | /* An error occurred while trying to spawn the process. */ | |
1270 | report_file_error ("Spawning child process", Qnil); | |
1271 | return cpid; | |
1272 | ||
bad95d8f | 1273 | #else /* not WINDOWSNT */ |
426b37ae JB |
1274 | /* Make sure that in, out, and err are not actually already in |
1275 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1276 | started with its standard in, out, or error closed, as might |
426b37ae | 1277 | happen under X. */ |
f29f9e4a RS |
1278 | { |
1279 | int oin = in, oout = out; | |
1280 | ||
1281 | /* We have to avoid relocating the same descriptor twice! */ | |
1282 | ||
1283 | in = relocate_fd (in, 3); | |
1284 | ||
1285 | if (out == oin) | |
1286 | out = in; | |
1287 | else | |
3e9367e7 | 1288 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1289 | |
1290 | if (err == oin) | |
1291 | err = in; | |
1292 | else if (err == oout) | |
1293 | err = out; | |
1294 | else | |
3e9367e7 | 1295 | err = relocate_fd (err, 3); |
f29f9e4a | 1296 | } |
426b37ae | 1297 | |
c17c4250 | 1298 | #ifndef MSDOS |
68c45bf0 PE |
1299 | emacs_close (0); |
1300 | emacs_close (1); | |
1301 | emacs_close (2); | |
80856e74 JB |
1302 | |
1303 | dup2 (in, 0); | |
1304 | dup2 (out, 1); | |
1305 | dup2 (err, 2); | |
68c45bf0 | 1306 | emacs_close (in); |
ce8f5a9a AS |
1307 | if (out != in) |
1308 | emacs_close (out); | |
1309 | if (err != in && err != out) | |
1310 | emacs_close (err); | |
80856e74 | 1311 | |
dd0333b6 | 1312 | setpgid (0, 0); |
12e610e8 | 1313 | tcsetpgrp (0, pid); |
a7ebc409 | 1314 | |
21e54a94 | 1315 | execve (new_argv[0], new_argv, env); |
80856e74 | 1316 | |
68c45bf0 PE |
1317 | emacs_write (1, "Can't exec program: ", 20); |
1318 | emacs_write (1, new_argv[0], strlen (new_argv[0])); | |
1319 | emacs_write (1, "\n", 1); | |
80856e74 | 1320 | _exit (1); |
67802943 DN |
1321 | |
1322 | #else /* MSDOS */ | |
1323 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
1324 | xfree (pwd_var); | |
1325 | if (pid == -1) | |
1326 | /* An error occurred while trying to run the subprocess. */ | |
1327 | report_file_error ("Spawning child process", Qnil); | |
1328 | return pid; | |
1329 | #endif /* MSDOS */ | |
ae76d9e1 | 1330 | #endif /* not WINDOWSNT */ |
80856e74 JB |
1331 | } |
1332 | ||
361358ea | 1333 | #ifndef WINDOWSNT |
a3833dfe | 1334 | /* Move the file descriptor FD so that its number is not less than MINFD. |
426b37ae | 1335 | If the file descriptor is moved at all, the original is freed. */ |
dfcf069d | 1336 | static int |
971de7fb | 1337 | relocate_fd (int fd, int minfd) |
426b37ae | 1338 | { |
a3833dfe | 1339 | if (fd >= minfd) |
426b37ae JB |
1340 | return fd; |
1341 | else | |
1342 | { | |
49cdacda | 1343 | int new = fcntl (fd, F_DUPFD, minfd); |
426b37ae JB |
1344 | if (new == -1) |
1345 | { | |
cb1d0ef7 | 1346 | const char *message_1 = "Error while setting up child: "; |
a8fe7202 | 1347 | const char *errmessage = strerror (errno); |
cb1d0ef7 PE |
1348 | const char *message_2 = "\n"; |
1349 | emacs_write (2, message_1, strlen (message_1)); | |
68c45bf0 | 1350 | emacs_write (2, errmessage, strlen (errmessage)); |
cb1d0ef7 | 1351 | emacs_write (2, message_2, strlen (message_2)); |
426b37ae JB |
1352 | _exit (1); |
1353 | } | |
68c45bf0 | 1354 | emacs_close (fd); |
426b37ae JB |
1355 | return new; |
1356 | } | |
1357 | } | |
361358ea | 1358 | #endif /* not WINDOWSNT */ |
426b37ae | 1359 | |
2f221583 | 1360 | static bool |
989f33ba PE |
1361 | getenv_internal_1 (const char *var, ptrdiff_t varlen, char **value, |
1362 | ptrdiff_t *valuelen, Lisp_Object env) | |
012c6fcb | 1363 | { |
db699fc6 | 1364 | for (; CONSP (env); env = XCDR (env)) |
012c6fcb | 1365 | { |
db699fc6 | 1366 | Lisp_Object entry = XCAR (env); |
d50d3dc8 | 1367 | if (STRINGP (entry) |
db699fc6 | 1368 | && SBYTES (entry) >= varlen |
bad95d8f RS |
1369 | #ifdef WINDOWSNT |
1370 | /* NT environment variables are case insensitive. */ | |
d5db4077 | 1371 | && ! strnicmp (SDATA (entry), var, varlen) |
bad95d8f | 1372 | #else /* not WINDOWSNT */ |
72af86bd | 1373 | && ! memcmp (SDATA (entry), var, varlen) |
bad95d8f | 1374 | #endif /* not WINDOWSNT */ |
a9971c6d | 1375 | ) |
012c6fcb | 1376 | { |
db699fc6 SM |
1377 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') |
1378 | { | |
51b59d79 | 1379 | *value = SSDATA (entry) + (varlen + 1); |
db699fc6 SM |
1380 | *valuelen = SBYTES (entry) - (varlen + 1); |
1381 | return 1; | |
1382 | } | |
1383 | else if (SBYTES (entry) == varlen) | |
1384 | { | |
1385 | /* Lone variable names in Vprocess_environment mean that | |
1386 | variable should be removed from the environment. */ | |
1387 | *value = NULL; | |
1388 | return 1; | |
1389 | } | |
1390 | } | |
1391 | } | |
1392 | return 0; | |
1393 | } | |
1394 | ||
2f221583 | 1395 | static bool |
989f33ba PE |
1396 | getenv_internal (const char *var, ptrdiff_t varlen, char **value, |
1397 | ptrdiff_t *valuelen, Lisp_Object frame) | |
012c6fcb | 1398 | { |
d2bb6598 SM |
1399 | /* Try to find VAR in Vprocess_environment first. */ |
1400 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1401 | Vprocess_environment)) | |
1402 | return *value ? 1 : 0; | |
f105f403 | 1403 | |
d2bb6598 | 1404 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
de87fb59 | 1405 | if (strcmp (var, "DISPLAY") == 0) |
d2bb6598 SM |
1406 | { |
1407 | Lisp_Object display | |
1408 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); | |
1409 | if (STRINGP (display)) | |
1410 | { | |
51b59d79 | 1411 | *value = SSDATA (display); |
de87fb59 | 1412 | *valuelen = SBYTES (display); |
012c6fcb JA |
1413 | return 1; |
1414 | } | |
d2bb6598 SM |
1415 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
1416 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1417 | Vinitial_environment)) | |
1418 | return *value ? 1 : 0; | |
012c6fcb JA |
1419 | } |
1420 | ||
1421 | return 0; | |
1422 | } | |
1423 | ||
f105f403 | 1424 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
5990851d KL |
1425 | doc: /* Get the value of environment variable VARIABLE. |
1426 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
1427 | the environment. Otherwise, value is a string. | |
f105f403 | 1428 | |
acf20901 | 1429 | This function searches `process-environment' for VARIABLE. |
5990851d | 1430 | |
db699fc6 | 1431 | If optional parameter ENV is a list, then search this list instead of |
acf20901 JB |
1432 | `process-environment', and return t when encountering a negative entry |
1433 | \(an entry for a variable with no value). */) | |
5842a27b | 1434 | (Lisp_Object variable, Lisp_Object env) |
012c6fcb JA |
1435 | { |
1436 | char *value; | |
989f33ba | 1437 | ptrdiff_t valuelen; |
012c6fcb | 1438 | |
5990851d | 1439 | CHECK_STRING (variable); |
db699fc6 SM |
1440 | if (CONSP (env)) |
1441 | { | |
42a5b22f | 1442 | if (getenv_internal_1 (SSDATA (variable), SBYTES (variable), |
db699fc6 SM |
1443 | &value, &valuelen, env)) |
1444 | return value ? make_string (value, valuelen) : Qt; | |
1445 | else | |
1446 | return Qnil; | |
1447 | } | |
42a5b22f | 1448 | else if (getenv_internal (SSDATA (variable), SBYTES (variable), |
d2bb6598 | 1449 | &value, &valuelen, env)) |
012c6fcb JA |
1450 | return make_string (value, valuelen); |
1451 | else | |
1452 | return Qnil; | |
1453 | } | |
1454 | ||
5990851d KL |
1455 | /* A version of getenv that consults the Lisp environment lists, |
1456 | easily callable from C. */ | |
012c6fcb | 1457 | char * |
a8fe7202 | 1458 | egetenv (const char *var) |
012c6fcb JA |
1459 | { |
1460 | char *value; | |
25c7e41f | 1461 | ptrdiff_t valuelen; |
012c6fcb | 1462 | |
f105f403 | 1463 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
012c6fcb JA |
1464 | return value; |
1465 | else | |
1466 | return 0; | |
1467 | } | |
1468 | ||
80856e74 | 1469 | \f |
8de15d69 | 1470 | /* This is run before init_cmdargs. */ |
177c0ea7 | 1471 | |
dfcf069d | 1472 | void |
971de7fb | 1473 | init_callproc_1 (void) |
8de15d69 | 1474 | { |
d01ba2f1 GM |
1475 | #ifdef HAVE_NS |
1476 | const char *etc_dir = ns_etc_directory (); | |
cbb31951 | 1477 | const char *path_exec = ns_exec_path (); |
d01ba2f1 | 1478 | #endif |
35a2f4b8 | 1479 | |
76151e2c | 1480 | Vdata_directory = decode_env_path ("EMACSDATA", |
d01ba2f1 | 1481 | #ifdef HAVE_NS |
76151e2c | 1482 | etc_dir ? etc_dir : |
d01ba2f1 | 1483 | #endif |
76151e2c EZ |
1484 | PATH_DATA); |
1485 | Vdata_directory = Ffile_name_as_directory (Fcar (Vdata_directory)); | |
1486 | ||
1487 | Vdoc_directory = decode_env_path ("EMACSDOC", | |
d01ba2f1 | 1488 | #ifdef HAVE_NS |
76151e2c | 1489 | etc_dir ? etc_dir : |
d01ba2f1 | 1490 | #endif |
76151e2c EZ |
1491 | PATH_DOC); |
1492 | Vdoc_directory = Ffile_name_as_directory (Fcar (Vdoc_directory)); | |
9453ea7b | 1493 | |
e576cab4 | 1494 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1495 | PATH_EXEC path from epaths.h. */ |
cbb31951 GM |
1496 | Vexec_path = decode_env_path ("EMACSPATH", |
1497 | #ifdef HAVE_NS | |
1498 | path_exec ? path_exec : | |
1499 | #endif | |
1500 | PATH_EXEC); | |
80856e74 | 1501 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
cbb31951 | 1502 | /* FIXME? For ns, path_exec should go at the front? */ |
80856e74 | 1503 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); |
8de15d69 RS |
1504 | } |
1505 | ||
e17f7533 | 1506 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1507 | |
dfcf069d | 1508 | void |
971de7fb | 1509 | init_callproc (void) |
8de15d69 RS |
1510 | { |
1511 | char *data_dir = egetenv ("EMACSDATA"); | |
177c0ea7 | 1512 | |
8de15d69 RS |
1513 | register char * sh; |
1514 | Lisp_Object tempdir; | |
d01ba2f1 GM |
1515 | #ifdef HAVE_NS |
1516 | if (data_dir == 0) | |
1517 | { | |
1518 | const char *etc_dir = ns_etc_directory (); | |
1519 | if (etc_dir) | |
1520 | { | |
1521 | data_dir = alloca (strlen (etc_dir) + 1); | |
1522 | strcpy (data_dir, etc_dir); | |
1523 | } | |
1524 | } | |
1525 | #endif | |
8de15d69 | 1526 | |
9cc4fad5 | 1527 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1528 | { |
05630743 RS |
1529 | /* Add to the path the lib-src subdir of the installation dir. */ |
1530 | Lisp_Object tem; | |
1531 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1532 | Vinstallation_directory); | |
76151e2c | 1533 | #ifndef MSDOS |
1a6640ec | 1534 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc | 1535 | if (NILP (Fmember (tem, Vexec_path))) |
70ec1377 | 1536 | { |
cbb31951 GM |
1537 | #ifdef HAVE_NS |
1538 | const char *path_exec = ns_exec_path (); | |
1539 | #endif | |
1540 | Vexec_path = decode_env_path ("EMACSPATH", | |
1541 | #ifdef HAVE_NS | |
1542 | path_exec ? path_exec : | |
1543 | #endif | |
1544 | PATH_EXEC); | |
70ec1377 RS |
1545 | Vexec_path = Fcons (tem, Vexec_path); |
1546 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
1547 | } | |
177c0ea7 | 1548 | |
0fa248bc | 1549 | Vexec_directory = Ffile_name_as_directory (tem); |
76151e2c | 1550 | #endif /* not MSDOS */ |
8de15d69 | 1551 | |
e17f7533 RS |
1552 | /* Maybe use ../etc as well as ../lib-src. */ |
1553 | if (data_dir == 0) | |
1554 | { | |
1555 | tem = Fexpand_file_name (build_string ("etc"), | |
1556 | Vinstallation_directory); | |
1557 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1558 | } |
1559 | } | |
7e933683 RS |
1560 | |
1561 | /* Look for the files that should be in etc. We don't use | |
1562 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1563 | near the executable, and they are never in the build |
7e933683 RS |
1564 | directory when that's different from the source directory. |
1565 | ||
1566 | Instead, if these files are not in the nominal place, we try the | |
1567 | source directory. */ | |
1568 | if (data_dir == 0) | |
1569 | { | |
70ec1377 | 1570 | Lisp_Object tem, tem1, srcdir; |
7e933683 | 1571 | |
70ec1377 RS |
1572 | srcdir = Fexpand_file_name (build_string ("../src/"), |
1573 | build_string (PATH_DUMPLOADSEARCH)); | |
7e933683 RS |
1574 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); |
1575 | tem1 = Ffile_exists_p (tem); | |
70ec1377 | 1576 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
7e933683 | 1577 | { |
70ec1377 | 1578 | Lisp_Object newdir; |
7e933683 RS |
1579 | newdir = Fexpand_file_name (build_string ("../etc/"), |
1580 | build_string (PATH_DUMPLOADSEARCH)); | |
1581 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1582 | tem1 = Ffile_exists_p (tem); | |
1583 | if (!NILP (tem1)) | |
1584 | Vdata_directory = newdir; | |
1585 | } | |
1586 | } | |
80856e74 | 1587 | |
d883eb62 RS |
1588 | #ifndef CANNOT_DUMP |
1589 | if (initialized) | |
1590 | #endif | |
1591 | { | |
1592 | tempdir = Fdirectory_file_name (Vexec_directory); | |
73dcdb9f PE |
1593 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
1594 | dir_warning ("arch-dependent data dir", Vexec_directory); | |
d883eb62 | 1595 | } |
80856e74 | 1596 | |
e576cab4 | 1597 | tempdir = Fdirectory_file_name (Vdata_directory); |
73dcdb9f PE |
1598 | if (! file_accessible_directory_p (SSDATA (tempdir))) |
1599 | dir_warning ("arch-independent data dir", Vdata_directory); | |
e576cab4 | 1600 | |
e576cab4 | 1601 | sh = (char *) getenv ("SHELL"); |
80856e74 | 1602 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
8abd035b | 1603 | |
40b49d4b JB |
1604 | #ifdef DOS_NT |
1605 | Vshared_game_score_directory = Qnil; | |
1606 | #else | |
63789758 | 1607 | Vshared_game_score_directory = build_string (PATH_GAME); |
73dcdb9f | 1608 | if (NILP (Ffile_accessible_directory_p (Vshared_game_score_directory))) |
63789758 | 1609 | Vshared_game_score_directory = Qnil; |
40b49d4b | 1610 | #endif |
9fefd2ba JB |
1611 | } |
1612 | ||
dfcf069d | 1613 | void |
971de7fb | 1614 | set_initial_environment (void) |
9fefd2ba | 1615 | { |
738db178 DN |
1616 | char **envp; |
1617 | for (envp = environ; *envp; envp++) | |
1618 | Vprocess_environment = Fcons (build_string (*envp), | |
1619 | Vprocess_environment); | |
1620 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent | |
1621 | to use `delete' and friends on process-environment. */ | |
1622 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); | |
80856e74 JB |
1623 | } |
1624 | ||
dfcf069d | 1625 | void |
971de7fb | 1626 | syms_of_callproc (void) |
80856e74 | 1627 | { |
f92d51d8 CY |
1628 | #ifndef DOS_NT |
1629 | Vtemp_file_name_pattern = build_string ("emacsXXXXXX"); | |
1630 | #elif defined (WINDOWSNT) | |
1631 | Vtemp_file_name_pattern = build_string ("emXXXXXX"); | |
1632 | #else | |
1633 | Vtemp_file_name_pattern = build_string ("detmp.XXX"); | |
1634 | #endif | |
1635 | staticpro (&Vtemp_file_name_pattern); | |
1636 | ||
29208e82 | 1637 | DEFVAR_LISP ("shell-file-name", Vshell_file_name, |
fb7ada5f | 1638 | doc: /* File name to load inferior shells from. |
b20b29be EZ |
1639 | Initialized from the SHELL environment variable, or to a system-dependent |
1640 | default if SHELL is not set. */); | |
80856e74 | 1641 | |
29208e82 | 1642 | DEFVAR_LISP ("exec-path", Vexec_path, |
fb7ada5f | 1643 | doc: /* List of directories to search programs to run in subprocesses. |
fdb82f93 | 1644 | Each element is a string (directory name) or nil (try default directory). */); |
80856e74 | 1645 | |
29208e82 | 1646 | DEFVAR_LISP ("exec-suffixes", Vexec_suffixes, |
fb7ada5f | 1647 | doc: /* List of suffixes to try to find executable file names. |
fdb82f93 | 1648 | Each element is a string. */); |
33d5af99 | 1649 | Vexec_suffixes = Qnil; |
b81a1b72 | 1650 | |
29208e82 | 1651 | DEFVAR_LISP ("exec-directory", Vexec_directory, |
fdb82f93 PJ |
1652 | doc: /* Directory for executables for Emacs to invoke. |
1653 | More generally, this includes any architecture-dependent files | |
1654 | that are built and installed from the Emacs distribution. */); | |
e576cab4 | 1655 | |
29208e82 | 1656 | DEFVAR_LISP ("data-directory", Vdata_directory, |
fdb82f93 PJ |
1657 | doc: /* Directory of machine-independent files that come with GNU Emacs. |
1658 | These are files intended for Emacs to use while it runs. */); | |
80856e74 | 1659 | |
29208e82 | 1660 | DEFVAR_LISP ("doc-directory", Vdoc_directory, |
fdb82f93 | 1661 | doc: /* Directory containing the DOC file that comes with GNU Emacs. |
ebf24b59 | 1662 | This is usually the same as `data-directory'. */); |
35a2f4b8 | 1663 | |
29208e82 | 1664 | DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory, |
fdb82f93 PJ |
1665 | doc: /* For internal use by the build procedure only. |
1666 | This is the name of the directory in which the build procedure installed | |
ebf24b59 | 1667 | Emacs's info files; the default value for `Info-default-directory-list' |
fdb82f93 | 1668 | includes this. */); |
ed61592a JB |
1669 | Vconfigure_info_directory = build_string (PATH_INFO); |
1670 | ||
29208e82 | 1671 | DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory, |
b065672a CW |
1672 | doc: /* Directory of score files for games which come with GNU Emacs. |
1673 | If this variable is nil, then Emacs is unable to use a shared directory. */); | |
40b49d4b JB |
1674 | #ifdef DOS_NT |
1675 | Vshared_game_score_directory = Qnil; | |
1676 | #else | |
63789758 | 1677 | Vshared_game_score_directory = build_string (PATH_GAME); |
40b49d4b | 1678 | #endif |
b065672a | 1679 | |
29208e82 | 1680 | DEFVAR_LISP ("initial-environment", Vinitial_environment, |
6b8e474c SM |
1681 | doc: /* List of environment variables inherited from the parent process. |
1682 | Each element should be a string of the form ENVVARNAME=VALUE. | |
1683 | The elements must normally be decoded (using `locale-coding-system') for use. */); | |
1684 | Vinitial_environment = Qnil; | |
1685 | ||
29208e82 | 1686 | DEFVAR_LISP ("process-environment", Vprocess_environment, |
5990851d | 1687 | doc: /* List of overridden environment variables for subprocesses to inherit. |
fdb82f93 | 1688 | Each element should be a string of the form ENVVARNAME=VALUE. |
5990851d | 1689 | |
a13f8f50 KL |
1690 | Entries in this list take precedence to those in the frame-local |
1691 | environments. Therefore, let-binding `process-environment' is an easy | |
1692 | way to temporarily change the value of an environment variable, | |
1693 | irrespective of where it comes from. To use `process-environment' to | |
1694 | remove an environment variable, include only its name in the list, | |
1695 | without "=VALUE". | |
5990851d KL |
1696 | |
1697 | This variable is set to nil when Emacs starts. | |
1698 | ||
fdb82f93 PJ |
1699 | If multiple entries define the same variable, the first one always |
1700 | takes precedence. | |
5990851d | 1701 | |
776a24a1 | 1702 | Non-ASCII characters are encoded according to the initial value of |
5990851d KL |
1703 | `locale-coding-system', i.e. the elements must normally be decoded for |
1704 | use. | |
1705 | ||
776a24a1 | 1706 | See `setenv' and `getenv'. */); |
86f5ca04 | 1707 | Vprocess_environment = Qnil; |
80856e74 | 1708 | |
80856e74 | 1709 | defsubr (&Scall_process); |
83fa009c | 1710 | defsubr (&Sgetenv_internal); |
e576cab4 | 1711 | defsubr (&Scall_process_region); |
80856e74 | 1712 | } |