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> |
80856e74 | 22 | #include <signal.h> |
e576cab4 | 23 | #include <errno.h> |
565620a5 | 24 | #include <stdio.h> |
d7306fe6 | 25 | #include <setjmp.h> |
80856e74 | 26 | #include <sys/types.h> |
3cbd6585 | 27 | #include <unistd.h> |
3cbd6585 | 28 | |
80856e74 | 29 | #include <sys/file.h> |
80856e74 | 30 | #include <fcntl.h> |
80856e74 | 31 | |
0898ca10 JB |
32 | #include "lisp.h" |
33 | ||
bad95d8f RS |
34 | #ifdef WINDOWSNT |
35 | #define NOMINMAX | |
36 | #include <windows.h> | |
489f9371 | 37 | #include "w32.h" |
bad95d8f RS |
38 | #define _P_NOWAIT 1 /* from process.h */ |
39 | #endif | |
40 | ||
7e6c2178 | 41 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
7e6c2178 RS |
42 | #include <sys/stat.h> |
43 | #include <sys/param.h> | |
7e6c2178 RS |
44 | #endif /* MSDOS */ |
45 | ||
80856e74 | 46 | #include "commands.h" |
91183bfd | 47 | #include "character.h" |
e5560ff7 | 48 | #include "buffer.h" |
edf496dd | 49 | #include "ccl.h" |
32d08644 | 50 | #include "coding.h" |
f0b950cf | 51 | #include "composite.h" |
57bda87a | 52 | #include <epaths.h> |
80856e74 | 53 | #include "process.h" |
d177f194 | 54 | #include "syssignal.h" |
a129418f | 55 | #include "systty.h" |
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 | ||
03695ace | 64 | #ifndef USE_CRT_DLL |
80856e74 JB |
65 | extern char **environ; |
66 | #endif | |
67 | ||
f95c3f91 | 68 | #ifdef HAVE_SETPGID |
58eb6cf0 | 69 | #if !defined (USG) |
320695d8 | 70 | #undef setpgrp |
f95c3f91 GM |
71 | #define setpgrp setpgid |
72 | #endif | |
2b7e8799 | 73 | #endif |
f95c3f91 | 74 | |
f92d51d8 CY |
75 | /* Pattern used by call-process-region to make temp files. */ |
76 | static Lisp_Object Vtemp_file_name_pattern; | |
77 | ||
e0f24100 | 78 | /* True if we are about to fork off a synchronous process or if we |
80856e74 JB |
79 | are waiting for it. */ |
80 | int synch_process_alive; | |
81 | ||
82 | /* Nonzero => this is a string explaining death of synchronous subprocess. */ | |
42ca4633 | 83 | const char *synch_process_death; |
80856e74 | 84 | |
6b61353c KH |
85 | /* Nonzero => this is the signal number that terminated the subprocess. */ |
86 | int synch_process_termsig; | |
87 | ||
80856e74 JB |
88 | /* If synch_process_death is zero, |
89 | this is exit code of synchronous subprocess. */ | |
90 | int synch_process_retcode; | |
f105f403 | 91 | |
80856e74 | 92 | \f |
37d54121 RS |
93 | /* Clean up when exiting Fcall_process. |
94 | On MSDOS, delete the temporary file on any kind of termination. | |
95 | On Unix, kill the process and any children on termination by signal. */ | |
96 | ||
97 | /* Nonzero if this is termination due to exit. */ | |
98 | static int call_process_exited; | |
99 | ||
d177f194 | 100 | static Lisp_Object |
971de7fb | 101 | call_process_kill (Lisp_Object fdpid) |
d177f194 | 102 | { |
d311d28c PE |
103 | int fd; |
104 | pid_t pid; | |
105 | CONS_TO_INTEGER (Fcar (fdpid), int, fd); | |
106 | CONS_TO_INTEGER (Fcdr (fdpid), pid_t, pid); | |
107 | emacs_close (fd); | |
108 | EMACS_KILLPG (pid, SIGKILL); | |
d177f194 JB |
109 | synch_process_alive = 0; |
110 | return Qnil; | |
111 | } | |
112 | ||
7710357c | 113 | static Lisp_Object |
971de7fb | 114 | call_process_cleanup (Lisp_Object arg) |
80856e74 | 115 | { |
ad3aaf33 | 116 | Lisp_Object fdpid = Fcdr (arg); |
d311d28c | 117 | int fd; |
ad3aaf33 AS |
118 | #if defined (MSDOS) |
119 | Lisp_Object file; | |
120 | #else | |
d311d28c | 121 | pid_t pid; |
ad3aaf33 AS |
122 | #endif |
123 | ||
124 | Fset_buffer (Fcar (arg)); | |
d311d28c | 125 | CONS_TO_INTEGER (Fcar (fdpid), int, fd); |
ad3aaf33 | 126 | |
e39a993c | 127 | #if defined (MSDOS) |
7e6c2178 | 128 | /* for MSDOS fdpid is really (fd . tempfile) */ |
c1350752 | 129 | file = Fcdr (fdpid); |
888c9e86 EZ |
130 | /* FD is -1 and FILE is "" when we didn't actually create a |
131 | temporary file in call-process. */ | |
132 | if (fd >= 0) | |
133 | emacs_close (fd); | |
134 | if (!(strcmp (SDATA (file), NULL_DEVICE) == 0 || SREF (file, 0) == '\0')) | |
d5db4077 | 135 | unlink (SDATA (file)); |
e39a993c | 136 | #else /* not MSDOS */ |
d311d28c | 137 | CONS_TO_INTEGER (Fcdr (fdpid), pid_t, pid); |
d177f194 | 138 | |
37d54121 | 139 | if (call_process_exited) |
6b6e798b | 140 | { |
d311d28c | 141 | emacs_close (fd); |
6b6e798b RS |
142 | return Qnil; |
143 | } | |
37d54121 | 144 | |
d177f194 JB |
145 | if (EMACS_KILLPG (pid, SIGINT) == 0) |
146 | { | |
d311d28c | 147 | ptrdiff_t count = SPECPDL_INDEX (); |
d177f194 JB |
148 | record_unwind_protect (call_process_kill, fdpid); |
149 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); | |
150 | immediate_quit = 1; | |
151 | QUIT; | |
152 | wait_for_termination (pid); | |
153 | immediate_quit = 0; | |
154 | specpdl_ptr = specpdl + count; /* Discard the unwind protect. */ | |
155 | message1 ("Waiting for process to die...done"); | |
156 | } | |
80856e74 | 157 | synch_process_alive = 0; |
d311d28c | 158 | emacs_close (fd); |
7e6c2178 | 159 | #endif /* not MSDOS */ |
80856e74 JB |
160 | return Qnil; |
161 | } | |
162 | ||
a7ca3326 | 163 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, |
fdb82f93 PJ |
164 | doc: /* Call PROGRAM synchronously in separate process. |
165 | The remaining arguments are optional. | |
166 | The program's input comes from file INFILE (nil means `/dev/null'). | |
1ef14cb4 LMI |
167 | Insert output in BUFFER before point; t means current buffer; nil for BUFFER |
168 | means discard it; 0 means discard and don't wait; and `(:file FILE)', where | |
1b9f60cc GM |
169 | FILE is a file name string, means that it should be written to that file |
170 | \(if the file already exists it is overwritten). | |
fdb82f93 PJ |
171 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
172 | REAL-BUFFER says what to do with standard output, as above, | |
173 | while STDERR-FILE says what to do with standard error in the child. | |
174 | STDERR-FILE may be nil (discard standard error output), | |
175 | t (mix it with ordinary output), or a file name string. | |
176 | ||
177 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
178 | Remaining arguments are strings passed as command arguments to PROGRAM. | |
179 | ||
a4feb144 RS |
180 | If executable PROGRAM can't be found as an executable, `call-process' |
181 | signals a Lisp error. `call-process' reports errors in execution of | |
182 | the program only through its return and output. | |
183 | ||
fdb82f93 PJ |
184 | If BUFFER is 0, `call-process' returns immediately with value nil. |
185 | Otherwise it waits for PROGRAM to terminate | |
186 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
187 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
188 | ||
189 | usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */) | |
f66c7cf8 | 190 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 191 | { |
d311d28c PE |
192 | Lisp_Object infile, buffer, current_dir, path, cleanup_info_tail; |
193 | int display_p; | |
80856e74 JB |
194 | int fd[2]; |
195 | int filefd; | |
4da256b1 KS |
196 | #define CALLPROC_BUFFER_SIZE_MIN (16 * 1024) |
197 | #define CALLPROC_BUFFER_SIZE_MAX (4 * CALLPROC_BUFFER_SIZE_MIN) | |
198 | char buf[CALLPROC_BUFFER_SIZE_MAX]; | |
199 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; | |
d311d28c PE |
200 | ptrdiff_t count = SPECPDL_INDEX (); |
201 | USE_SAFE_ALLOCA; | |
2d607244 | 202 | |
1aa83b22 | 203 | register const unsigned char **new_argv; |
39eaa782 RS |
204 | /* File to use for stderr in the child. |
205 | t means use same as standard output. */ | |
206 | Lisp_Object error_file; | |
1ef14cb4 | 207 | Lisp_Object output_file = Qnil; |
7e6c2178 | 208 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
888c9e86 | 209 | char *outf, *tempfile = NULL; |
7e6c2178 | 210 | int outfilefd; |
d311d28c PE |
211 | int pid; |
212 | #else | |
213 | pid_t pid; | |
80856e74 | 214 | #endif |
1ef14cb4 | 215 | int fd_output = -1; |
32d08644 KH |
216 | struct coding_system process_coding; /* coding-system of process output */ |
217 | struct coding_system argument_coding; /* coding-system of arguments */ | |
09494912 RS |
218 | /* Set to the return value of Ffind_operation_coding_system. */ |
219 | Lisp_Object coding_systems; | |
1ef14cb4 | 220 | int output_to_buffer = 1; |
09494912 RS |
221 | |
222 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ | |
223 | coding_systems = Qt; | |
32d08644 | 224 | |
b7826503 | 225 | CHECK_STRING (args[0]); |
80856e74 | 226 | |
39eaa782 RS |
227 | error_file = Qt; |
228 | ||
7e6c2178 RS |
229 | #ifndef subprocesses |
230 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
177c0ea7 | 231 | if (nargs >= 3 |
09ffb8b5 | 232 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
233 | error ("Operating system cannot handle asynchronous subprocesses"); |
234 | #endif /* subprocesses */ | |
235 | ||
09494912 | 236 | /* Decide the coding-system for giving arguments. */ |
32d08644 KH |
237 | { |
238 | Lisp_Object val, *args2; | |
f66c7cf8 | 239 | ptrdiff_t i; |
32d08644 KH |
240 | |
241 | /* If arguments are supplied, we may have to encode them. */ | |
242 | if (nargs >= 5) | |
243 | { | |
30d57b8e | 244 | int must_encode = 0; |
6e50da0a | 245 | Lisp_Object coding_attrs; |
30d57b8e | 246 | |
e7c1c20e | 247 | for (i = 4; i < nargs; i++) |
b7826503 | 248 | CHECK_STRING (args[i]); |
e7c1c20e | 249 | |
a2286b5c | 250 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
251 | if (STRING_MULTIBYTE (args[i])) |
252 | must_encode = 1; | |
253 | ||
beacaab3 KH |
254 | if (!NILP (Vcoding_system_for_write)) |
255 | val = Vcoding_system_for_write; | |
30d57b8e | 256 | else if (! must_encode) |
fcaf8878 | 257 | val = Qraw_text; |
beacaab3 | 258 | else |
32d08644 | 259 | { |
0065d054 | 260 | SAFE_NALLOCA (args2, 1, nargs + 1); |
32d08644 KH |
261 | args2[0] = Qcall_process; |
262 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 263 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 264 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
32d08644 | 265 | } |
fcaf8878 | 266 | val = complement_process_encoding_system (val); |
32d08644 | 267 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); |
6e50da0a KH |
268 | coding_attrs = CODING_ID_ATTRS (argument_coding.id); |
269 | if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs))) | |
270 | { | |
271 | /* We should not use an ASCII incompatible coding system. */ | |
272 | val = raw_text_coding_system (val); | |
273 | setup_coding_system (val, &argument_coding); | |
274 | } | |
32d08644 | 275 | } |
32d08644 KH |
276 | } |
277 | ||
e576cab4 JB |
278 | if (nargs >= 2 && ! NILP (args[1])) |
279 | { | |
4b4deea2 | 280 | infile = Fexpand_file_name (args[1], BVAR (current_buffer, directory)); |
b7826503 | 281 | CHECK_STRING (infile); |
e576cab4 | 282 | } |
80856e74 | 283 | else |
5437e9f9 | 284 | infile = build_string (NULL_DEVICE); |
80856e74 | 285 | |
e576cab4 JB |
286 | if (nargs >= 3) |
287 | { | |
39eaa782 RS |
288 | buffer = args[2]; |
289 | ||
1ef14cb4 LMI |
290 | /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT |
291 | FILE-FOR-STDERR), unless the first element is :file, in which case see | |
292 | the next paragraph. */ | |
19ed11ba AS |
293 | if (CONSP (buffer) |
294 | && (! SYMBOLP (XCAR (buffer)) | |
295 | || strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file"))) | |
39eaa782 | 296 | { |
70949dac | 297 | if (CONSP (XCDR (buffer))) |
45be8a1e | 298 | { |
a9d4f28a | 299 | Lisp_Object stderr_file; |
70949dac | 300 | stderr_file = XCAR (XCDR (buffer)); |
45be8a1e RS |
301 | |
302 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
303 | error_file = stderr_file; | |
304 | else | |
305 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
306 | } | |
307 | ||
70949dac | 308 | buffer = XCAR (buffer); |
39eaa782 | 309 | } |
044512ed | 310 | |
1ef14cb4 | 311 | /* If the buffer is (still) a list, it might be a (:file "file") spec. */ |
19ed11ba AS |
312 | if (CONSP (buffer) |
313 | && SYMBOLP (XCAR (buffer)) | |
314 | && ! strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file")) | |
1ef14cb4 LMI |
315 | { |
316 | output_file = Fexpand_file_name (XCAR (XCDR (buffer)), | |
317 | BVAR (current_buffer, directory)); | |
318 | CHECK_STRING (output_file); | |
319 | buffer = Qnil; | |
320 | } | |
321 | ||
39eaa782 RS |
322 | if (!(EQ (buffer, Qnil) |
323 | || EQ (buffer, Qt) | |
3ffde7d6 | 324 | || INTEGERP (buffer))) |
e576cab4 | 325 | { |
39eaa782 RS |
326 | Lisp_Object spec_buffer; |
327 | spec_buffer = buffer; | |
50fe359b | 328 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
329 | /* Mention the buffer name for a better error message. */ |
330 | if (NILP (buffer)) | |
b7826503 PJ |
331 | CHECK_BUFFER (spec_buffer); |
332 | CHECK_BUFFER (buffer); | |
e576cab4 JB |
333 | } |
334 | } | |
177c0ea7 | 335 | else |
e576cab4 | 336 | buffer = Qnil; |
80856e74 | 337 | |
58616e67 JB |
338 | /* Make sure that the child will be able to chdir to the current |
339 | buffer's current directory, or its unhandled equivalent. We | |
340 | can't just have the child check for an error when it does the | |
341 | chdir, since it's in a vfork. | |
342 | ||
343 | We have to GCPRO around this because Fexpand_file_name, | |
344 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
345 | might call a file name handling function. The argument list is | |
346 | protected by the caller, so all we really have to worry about is | |
347 | buffer. */ | |
348 | { | |
1ef14cb4 | 349 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
58616e67 | 350 | |
4b4deea2 | 351 | current_dir = BVAR (current_buffer, directory); |
58616e67 | 352 | |
1ef14cb4 | 353 | GCPRO5 (infile, buffer, current_dir, error_file, output_file); |
58616e67 | 354 | |
ca319910 SM |
355 | current_dir = Funhandled_file_name_directory (current_dir); |
356 | if (NILP (current_dir)) | |
357 | /* If the file name handler says that current_dir is unreachable, use | |
358 | a sensible default. */ | |
359 | current_dir = build_string ("~/"); | |
360 | current_dir = expand_and_dir_to_file (current_dir, Qnil); | |
db8454b0 CY |
361 | current_dir = Ffile_name_as_directory (current_dir); |
362 | ||
58616e67 JB |
363 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
364 | report_file_error ("Setting current directory", | |
4b4deea2 | 365 | Fcons (BVAR (current_buffer, directory), Qnil)); |
58616e67 | 366 | |
34b87689 KH |
367 | if (STRING_MULTIBYTE (infile)) |
368 | infile = ENCODE_FILE (infile); | |
369 | if (STRING_MULTIBYTE (current_dir)) | |
370 | current_dir = ENCODE_FILE (current_dir); | |
371 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) | |
372 | error_file = ENCODE_FILE (error_file); | |
1ef14cb4 LMI |
373 | if (STRINGP (output_file) && STRING_MULTIBYTE (output_file)) |
374 | output_file = ENCODE_FILE (output_file); | |
58616e67 JB |
375 | UNGCPRO; |
376 | } | |
377 | ||
d311d28c | 378 | display_p = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
80856e74 | 379 | |
42a5b22f | 380 | filefd = emacs_open (SSDATA (infile), O_RDONLY, 0); |
80856e74 JB |
381 | if (filefd < 0) |
382 | { | |
34b87689 | 383 | infile = DECODE_FILE (infile); |
e576cab4 | 384 | report_file_error ("Opening process input file", Fcons (infile, Qnil)); |
80856e74 | 385 | } |
1ef14cb4 LMI |
386 | |
387 | if (STRINGP (output_file)) | |
388 | { | |
389 | #ifdef DOS_NT | |
390 | fd_output = emacs_open (SSDATA (output_file), | |
391 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, | |
392 | S_IREAD | S_IWRITE); | |
393 | #else /* not DOS_NT */ | |
394 | fd_output = creat (SSDATA (output_file), 0666); | |
395 | #endif /* not DOS_NT */ | |
396 | if (fd_output < 0) | |
397 | { | |
398 | output_file = DECODE_FILE (output_file); | |
399 | report_file_error ("Opening process output file", | |
400 | Fcons (output_file, Qnil)); | |
19ed11ba | 401 | } |
1ef14cb4 | 402 | if (STRINGP (error_file) || NILP (error_file)) |
19ed11ba | 403 | output_to_buffer = 0; |
1ef14cb4 LMI |
404 | } |
405 | ||
80856e74 | 406 | /* Search for program; barf if not found. */ |
c52b0b34 | 407 | { |
ad3aaf33 | 408 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
c52b0b34 | 409 | |
ad3aaf33 | 410 | GCPRO4 (infile, buffer, current_dir, error_file); |
5c150961 | 411 | openp (Vexec_path, args[0], Vexec_suffixes, &path, make_number (X_OK)); |
c52b0b34 KH |
412 | UNGCPRO; |
413 | } | |
012c6fcb | 414 | if (NILP (path)) |
80856e74 | 415 | { |
68c45bf0 | 416 | emacs_close (filefd); |
80856e74 JB |
417 | report_file_error ("Searching for program", Fcons (args[0], Qnil)); |
418 | } | |
8ee8f447 RS |
419 | |
420 | /* If program file name starts with /: for quoting a magic name, | |
421 | discard that. */ | |
422 | if (SBYTES (path) > 2 && SREF (path, 0) == '/' | |
423 | && SREF (path, 1) == ':') | |
424 | path = Fsubstring (path, make_number (2), Qnil); | |
425 | ||
3c59b4c9 PE |
426 | SAFE_ALLOCA (new_argv, const unsigned char **, |
427 | (nargs > 4 ? nargs - 2 : 2) * sizeof *new_argv); | |
c364e618 KH |
428 | if (nargs > 4) |
429 | { | |
f66c7cf8 | 430 | ptrdiff_t i; |
ad3aaf33 | 431 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
c364e618 | 432 | |
ad3aaf33 | 433 | GCPRO5 (infile, buffer, current_dir, path, error_file); |
c5bfa12b KH |
434 | argument_coding.dst_multibyte = 0; |
435 | for (i = 4; i < nargs; i++) | |
c364e618 | 436 | { |
c5bfa12b KH |
437 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); |
438 | if (CODING_REQUIRE_ENCODING (&argument_coding)) | |
91183bfd KH |
439 | /* We must encode this argument. */ |
440 | args[i] = encode_coding_string (&argument_coding, args[i], 1); | |
c364e618 | 441 | } |
c5bfa12b | 442 | UNGCPRO; |
1aa83b22 AS |
443 | for (i = 4; i < nargs; i++) |
444 | new_argv[i - 3] = SDATA (args[i]); | |
445 | new_argv[i - 3] = 0; | |
c364e618 | 446 | } |
db54baaa KH |
447 | else |
448 | new_argv[1] = 0; | |
1aa83b22 | 449 | new_argv[0] = SDATA (path); |
80856e74 | 450 | |
7e6c2178 | 451 | #ifdef MSDOS /* MW, July 1993 */ |
7e6c2178 | 452 | |
888c9e86 EZ |
453 | /* If we're redirecting STDOUT to a file, that file is already open |
454 | on fd_output. */ | |
1ef14cb4 | 455 | if (fd_output < 0) |
7e6c2178 | 456 | { |
888c9e86 EZ |
457 | if ((outf = egetenv ("TMPDIR"))) |
458 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); | |
459 | else | |
460 | { | |
461 | tempfile = alloca (20); | |
462 | *tempfile = '\0'; | |
463 | } | |
464 | dostounix_filename (tempfile); | |
465 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') | |
466 | strcat (tempfile, "/"); | |
467 | strcat (tempfile, "detmp.XXX"); | |
468 | mktemp (tempfile); | |
1ef14cb4 LMI |
469 | outfilefd = creat (tempfile, S_IREAD | S_IWRITE); |
470 | if (outfilefd < 0) { | |
471 | emacs_close (filefd); | |
472 | report_file_error ("Opening process output file", | |
473 | Fcons (build_string (tempfile), Qnil)); | |
474 | } | |
7e6c2178 | 475 | } |
1ef14cb4 LMI |
476 | else |
477 | outfilefd = fd_output; | |
6f89d28a | 478 | fd[0] = filefd; |
2610078a | 479 | fd[1] = outfilefd; |
6f89d28a | 480 | #endif /* MSDOS */ |
7e6c2178 | 481 | |
d50d3dc8 | 482 | if (INTEGERP (buffer)) |
68c45bf0 | 483 | fd[1] = emacs_open (NULL_DEVICE, O_WRONLY, 0), fd[0] = -1; |
80856e74 JB |
484 | else |
485 | { | |
7e6c2178 | 486 | #ifndef MSDOS |
db92b288 GM |
487 | errno = 0; |
488 | if (pipe (fd) == -1) | |
489 | { | |
490 | emacs_close (filefd); | |
491 | report_file_error ("Creating process pipe", Qnil); | |
492 | } | |
80856e74 JB |
493 | #endif |
494 | } | |
495 | ||
496 | { | |
497 | /* child_setup must clobber environ in systems with true vfork. | |
498 | Protect it from permanent change. */ | |
499 | register char **save_environ = environ; | |
500 | register int fd1 = fd[1]; | |
39eaa782 | 501 | int fd_error = fd1; |
c0ad4ea5 AS |
502 | #ifdef HAVE_WORKING_VFORK |
503 | sigset_t procmask; | |
504 | sigset_t blocked; | |
505 | struct sigaction sigpipe_action; | |
506 | #endif | |
80856e74 | 507 | |
1ef14cb4 LMI |
508 | if (fd_output >= 0) |
509 | fd1 = fd_output; | |
80856e74 | 510 | #if 0 /* Some systems don't have sigblock. */ |
e065a56e | 511 | mask = sigblock (sigmask (SIGCHLD)); |
80856e74 JB |
512 | #endif |
513 | ||
514 | /* Record that we're about to create a synchronous process. */ | |
515 | synch_process_alive = 1; | |
516 | ||
5c03767e RS |
517 | /* These vars record information from process termination. |
518 | Clear them now before process can possibly terminate, | |
519 | to avoid timing error if process terminates soon. */ | |
520 | synch_process_death = 0; | |
521 | synch_process_retcode = 0; | |
6b61353c | 522 | synch_process_termsig = 0; |
5c03767e | 523 | |
39eaa782 | 524 | if (NILP (error_file)) |
68c45bf0 | 525 | fd_error = emacs_open (NULL_DEVICE, O_WRONLY, 0); |
39eaa782 RS |
526 | else if (STRINGP (error_file)) |
527 | { | |
528 | #ifdef DOS_NT | |
42a5b22f | 529 | fd_error = emacs_open (SSDATA (error_file), |
68c45bf0 PE |
530 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, |
531 | S_IREAD | S_IWRITE); | |
39eaa782 | 532 | #else /* not DOS_NT */ |
42a5b22f | 533 | fd_error = creat (SSDATA (error_file), 0666); |
39eaa782 RS |
534 | #endif /* not DOS_NT */ |
535 | } | |
536 | ||
537 | if (fd_error < 0) | |
538 | { | |
68c45bf0 | 539 | emacs_close (filefd); |
6f89d28a | 540 | if (fd[0] != filefd) |
68c45bf0 | 541 | emacs_close (fd[0]); |
39eaa782 | 542 | if (fd1 >= 0) |
68c45bf0 | 543 | emacs_close (fd1); |
6f89d28a MB |
544 | #ifdef MSDOS |
545 | unlink (tempfile); | |
546 | #endif | |
34b87689 KH |
547 | if (NILP (error_file)) |
548 | error_file = build_string (NULL_DEVICE); | |
549 | else if (STRINGP (error_file)) | |
550 | error_file = DECODE_FILE (error_file); | |
551 | report_file_error ("Cannot redirect stderr", Fcons (error_file, Qnil)); | |
39eaa782 | 552 | } |
89e1ec1d | 553 | |
2610078a | 554 | #ifdef MSDOS /* MW, July 1993 */ |
c17c4250 | 555 | /* Note that on MSDOS `child_setup' actually returns the child process |
2610078a KH |
556 | exit status, not its PID, so we assign it to `synch_process_retcode' |
557 | below. */ | |
c17c4250 EZ |
558 | pid = child_setup (filefd, outfilefd, fd_error, (char **) new_argv, |
559 | 0, current_dir); | |
39eaa782 | 560 | |
2610078a KH |
561 | /* Record that the synchronous process exited and note its |
562 | termination status. */ | |
563 | synch_process_alive = 0; | |
564 | synch_process_retcode = pid; | |
565 | if (synch_process_retcode < 0) /* means it couldn't be exec'ed */ | |
68c45bf0 | 566 | { |
ca9c0567 | 567 | synchronize_system_messages_locale (); |
68c45bf0 PE |
568 | synch_process_death = strerror (errno); |
569 | } | |
2610078a | 570 | |
68c45bf0 | 571 | emacs_close (outfilefd); |
2610078a | 572 | if (fd_error != outfilefd) |
68c45bf0 | 573 | emacs_close (fd_error); |
2610078a | 574 | fd1 = -1; /* No harm in closing that one! */ |
888c9e86 | 575 | if (tempfile) |
2610078a | 576 | { |
888c9e86 EZ |
577 | /* Since CRLF is converted to LF within `decode_coding', we |
578 | can always open a file with binary mode. */ | |
579 | fd[0] = emacs_open (tempfile, O_RDONLY | O_BINARY, 0); | |
580 | if (fd[0] < 0) | |
581 | { | |
582 | unlink (tempfile); | |
583 | emacs_close (filefd); | |
584 | report_file_error ("Cannot re-open temporary file", | |
7285dc67 | 585 | Fcons (build_string (tempfile), Qnil)); |
888c9e86 | 586 | } |
2610078a | 587 | } |
888c9e86 EZ |
588 | else |
589 | fd[0] = -1; /* We are not going to read from tempfile. */ | |
2610078a | 590 | #else /* not MSDOS */ |
bad95d8f | 591 | #ifdef WINDOWSNT |
2d607244 RS |
592 | pid = child_setup (filefd, fd1, fd_error, (char **) new_argv, |
593 | 0, current_dir); | |
bad95d8f | 594 | #else /* not WINDOWSNT */ |
c0ad4ea5 AS |
595 | |
596 | #ifdef HAVE_WORKING_VFORK | |
597 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', | |
598 | this sets the parent's signal handlers as well as the child's. | |
599 | So delay all interrupts whose handlers the child might munge, | |
600 | and record the current handlers so they can be restored later. */ | |
601 | sigemptyset (&blocked); | |
602 | sigaddset (&blocked, SIGPIPE); | |
603 | sigaction (SIGPIPE, 0, &sigpipe_action); | |
123403e4 | 604 | pthread_sigmask (SIG_BLOCK, &blocked, &procmask); |
c0ad4ea5 AS |
605 | #endif |
606 | ||
aba637ec KS |
607 | BLOCK_INPUT; |
608 | ||
db6c0e74 | 609 | /* vfork, and prevent local vars from being clobbered by the vfork. */ |
b08a63cc | 610 | { |
c74e9d86 PE |
611 | Lisp_Object volatile buffer_volatile = buffer; |
612 | Lisp_Object volatile coding_systems_volatile = coding_systems; | |
613 | Lisp_Object volatile current_dir_volatile = current_dir; | |
d311d28c | 614 | int volatile display_p_volatile = display_p; |
5266b4bb | 615 | int volatile fd1_volatile = fd1; |
db6c0e74 PE |
616 | int volatile fd_error_volatile = fd_error; |
617 | int volatile fd_output_volatile = fd_output; | |
618 | int volatile output_to_buffer_volatile = output_to_buffer; | |
d311d28c PE |
619 | int volatile sa_must_free_volatile = sa_must_free; |
620 | ptrdiff_t volatile sa_count_volatile = sa_count; | |
db6c0e74 | 621 | unsigned char const **volatile new_argv_volatile = new_argv; |
80856e74 | 622 | |
db6c0e74 | 623 | pid = vfork (); |
80856e74 | 624 | |
c74e9d86 PE |
625 | buffer = buffer_volatile; |
626 | coding_systems = coding_systems_volatile; | |
627 | current_dir = current_dir_volatile; | |
d311d28c | 628 | display_p = display_p_volatile; |
5266b4bb | 629 | fd1 = fd1_volatile; |
db6c0e74 PE |
630 | fd_error = fd_error_volatile; |
631 | fd_output = fd_output_volatile; | |
632 | output_to_buffer = output_to_buffer_volatile; | |
12b3abd5 | 633 | sa_must_free = sa_must_free_volatile; |
d311d28c | 634 | sa_count = sa_count_volatile; |
db6c0e74 PE |
635 | new_argv = new_argv_volatile; |
636 | } | |
b9c7f648 | 637 | |
80856e74 JB |
638 | if (pid == 0) |
639 | { | |
640 | if (fd[0] >= 0) | |
68c45bf0 | 641 | emacs_close (fd[0]); |
1e7963c7 | 642 | #ifdef HAVE_SETSID |
19ed11ba | 643 | setsid (); |
1e7963c7 | 644 | #endif |
58eb6cf0 | 645 | #if defined (USG) |
19ed11ba | 646 | setpgrp (); |
80856e74 | 647 | #else |
19ed11ba | 648 | setpgrp (pid, pid); |
80856e74 | 649 | #endif /* USG */ |
c0ad4ea5 | 650 | |
2f9a22e2 | 651 | /* GConf causes us to ignore SIGPIPE, make sure it is restored |
c0ad4ea5 | 652 | in the child. */ |
2f9b9adb | 653 | signal (SIGPIPE, SIG_DFL); |
c0ad4ea5 | 654 | #ifdef HAVE_WORKING_VFORK |
123403e4 | 655 | pthread_sigmask (SIG_SETMASK, &procmask, 0); |
c0ad4ea5 AS |
656 | #endif |
657 | ||
2d607244 RS |
658 | child_setup (filefd, fd1, fd_error, (char **) new_argv, |
659 | 0, current_dir); | |
80856e74 | 660 | } |
aba637ec KS |
661 | |
662 | UNBLOCK_INPUT; | |
c0ad4ea5 AS |
663 | |
664 | #ifdef HAVE_WORKING_VFORK | |
665 | /* Restore the signal state. */ | |
666 | sigaction (SIGPIPE, &sigpipe_action, 0); | |
123403e4 | 667 | pthread_sigmask (SIG_SETMASK, &procmask, 0); |
c0ad4ea5 AS |
668 | #endif |
669 | ||
bad95d8f | 670 | #endif /* not WINDOWSNT */ |
cd5f8f60 RS |
671 | |
672 | /* The MSDOS case did this already. */ | |
673 | if (fd_error >= 0) | |
68c45bf0 | 674 | emacs_close (fd_error); |
2610078a | 675 | #endif /* not MSDOS */ |
80856e74 | 676 | |
80856e74 JB |
677 | environ = save_environ; |
678 | ||
6b6e798b RS |
679 | /* Close most of our fd's, but not fd[0] |
680 | since we will use that to read input from. */ | |
68c45bf0 | 681 | emacs_close (filefd); |
1ef14cb4 LMI |
682 | if (fd_output >= 0) |
683 | emacs_close (fd_output); | |
799abb26 | 684 | if (fd1 >= 0 && fd1 != fd_error) |
68c45bf0 | 685 | emacs_close (fd1); |
80856e74 JB |
686 | } |
687 | ||
688 | if (pid < 0) | |
689 | { | |
6b6e798b | 690 | if (fd[0] >= 0) |
68c45bf0 | 691 | emacs_close (fd[0]); |
80856e74 JB |
692 | report_file_error ("Doing vfork", Qnil); |
693 | } | |
694 | ||
d50d3dc8 | 695 | if (INTEGERP (buffer)) |
80856e74 | 696 | { |
6b6e798b | 697 | if (fd[0] >= 0) |
68c45bf0 | 698 | emacs_close (fd[0]); |
80856e74 JB |
699 | return Qnil; |
700 | } | |
701 | ||
6b6e798b | 702 | /* Enable sending signal if user quits below. */ |
37d54121 RS |
703 | call_process_exited = 0; |
704 | ||
5e617bc2 | 705 | #if defined (MSDOS) |
7e6c2178 | 706 | /* MSDOS needs different cleanup information. */ |
d311d28c | 707 | cleanup_info_tail = build_string (tempfile ? tempfile : ""); |
7e6c2178 | 708 | #else |
d311d28c PE |
709 | cleanup_info_tail = INTEGER_TO_CONS (pid); |
710 | #endif /* not MSDOS */ | |
80856e74 | 711 | record_unwind_protect (call_process_cleanup, |
ad3aaf33 | 712 | Fcons (Fcurrent_buffer (), |
d311d28c PE |
713 | Fcons (INTEGER_TO_CONS (fd[0]), |
714 | cleanup_info_tail))); | |
80856e74 | 715 | |
d50d3dc8 | 716 | if (BUFFERP (buffer)) |
80856e74 JB |
717 | Fset_buffer (buffer); |
718 | ||
09494912 RS |
719 | if (NILP (buffer)) |
720 | { | |
721 | /* If BUFFER is nil, we must read process output once and then | |
722 | discard it, so setup coding system but with nil. */ | |
723 | setup_coding_system (Qnil, &process_coding); | |
659afede | 724 | process_coding.dst_multibyte = 0; |
09494912 RS |
725 | } |
726 | else | |
727 | { | |
728 | Lisp_Object val, *args2; | |
729 | ||
730 | val = Qnil; | |
731 | if (!NILP (Vcoding_system_for_read)) | |
732 | val = Vcoding_system_for_read; | |
733 | else | |
734 | { | |
735 | if (EQ (coding_systems, Qt)) | |
736 | { | |
f66c7cf8 | 737 | ptrdiff_t i; |
09494912 | 738 | |
0065d054 | 739 | SAFE_NALLOCA (args2, 1, nargs + 1); |
09494912 RS |
740 | args2[0] = Qcall_process; |
741 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
742 | coding_systems | |
743 | = Ffind_operation_coding_system (nargs + 1, args2); | |
744 | } | |
745 | if (CONSP (coding_systems)) | |
70949dac | 746 | val = XCAR (coding_systems); |
09494912 | 747 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 748 | val = XCAR (Vdefault_process_coding_system); |
09494912 RS |
749 | else |
750 | val = Qnil; | |
751 | } | |
91183bfd | 752 | Fcheck_coding_system (val); |
09494912 RS |
753 | /* In unibyte mode, character code conversion should not take |
754 | place but EOL conversion should. So, setup raw-text or one | |
755 | of the subsidiary according to the information just setup. */ | |
4b4deea2 | 756 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
09494912 | 757 | && !NILP (val)) |
91183bfd KH |
758 | val = raw_text_coding_system (val); |
759 | setup_coding_system (val, &process_coding); | |
659afede KH |
760 | process_coding.dst_multibyte |
761 | = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); | |
09494912 | 762 | } |
a0241d01 | 763 | process_coding.src_multibyte = 0; |
09494912 | 764 | |
80856e74 JB |
765 | immediate_quit = 1; |
766 | QUIT; | |
767 | ||
1ef14cb4 | 768 | if (output_to_buffer) |
19ed11ba | 769 | { |
d311d28c | 770 | register int nread; |
19ed11ba AS |
771 | int first = 1; |
772 | EMACS_INT total_read = 0; | |
773 | int carryover = 0; | |
19ed11ba AS |
774 | int display_on_the_fly = display_p; |
775 | struct coding_system saved_coding; | |
776 | ||
777 | saved_coding = process_coding; | |
778 | while (1) | |
779 | { | |
780 | /* Repeatedly read until we've filled as much as possible | |
781 | of the buffer size we have. But don't read | |
782 | less than 1024--save that for the next bufferful. */ | |
783 | nread = carryover; | |
784 | while (nread < bufsize - 1024) | |
785 | { | |
786 | int this_read = emacs_read (fd[0], buf + nread, | |
787 | bufsize - nread); | |
60558b19 | 788 | |
19ed11ba AS |
789 | if (this_read < 0) |
790 | goto give_up; | |
60558b19 | 791 | |
19ed11ba AS |
792 | if (this_read == 0) |
793 | { | |
794 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
795 | break; | |
796 | } | |
60558b19 | 797 | |
19ed11ba AS |
798 | nread += this_read; |
799 | total_read += this_read; | |
60558b19 | 800 | |
19ed11ba AS |
801 | if (display_on_the_fly) |
802 | break; | |
803 | } | |
60558b19 | 804 | |
19ed11ba AS |
805 | /* Now NREAD is the total amount of data in the buffer. */ |
806 | immediate_quit = 0; | |
177c0ea7 | 807 | |
19ed11ba AS |
808 | if (!NILP (buffer)) |
809 | { | |
810 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) | |
811 | && ! CODING_MAY_REQUIRE_DECODING (&process_coding)) | |
812 | insert_1_both (buf, nread, nread, 0, 1, 0); | |
813 | else | |
814 | { /* We have to decode the input. */ | |
815 | Lisp_Object curbuf; | |
d311d28c | 816 | ptrdiff_t count1 = SPECPDL_INDEX (); |
19ed11ba AS |
817 | |
818 | XSETBUFFER (curbuf, current_buffer); | |
819 | /* We cannot allow after-change-functions be run | |
820 | during decoding, because that might modify the | |
821 | buffer, while we rely on process_coding.produced to | |
822 | faithfully reflect inserted text until we | |
823 | TEMP_SET_PT_BOTH below. */ | |
824 | specbind (Qinhibit_modification_hooks, Qt); | |
825 | decode_coding_c_string (&process_coding, | |
826 | (unsigned char *) buf, nread, curbuf); | |
827 | unbind_to (count1, Qnil); | |
828 | if (display_on_the_fly | |
829 | && CODING_REQUIRE_DETECTION (&saved_coding) | |
830 | && ! CODING_REQUIRE_DETECTION (&process_coding)) | |
831 | { | |
832 | /* We have detected some coding system. But, | |
833 | there's a possibility that the detection was | |
834 | done by insufficient data. So, we give up | |
835 | displaying on the fly. */ | |
836 | if (process_coding.produced > 0) | |
837 | del_range_2 (process_coding.dst_pos, | |
838 | process_coding.dst_pos_byte, | |
839 | process_coding.dst_pos | |
840 | + process_coding.produced_char, | |
841 | process_coding.dst_pos_byte | |
842 | + process_coding.produced, 0); | |
843 | display_on_the_fly = 0; | |
844 | process_coding = saved_coding; | |
845 | carryover = nread; | |
846 | /* This is to make the above condition always | |
847 | fails in the future. */ | |
848 | saved_coding.common_flags | |
849 | &= ~CODING_REQUIRE_DETECTION_MASK; | |
850 | continue; | |
851 | } | |
852 | ||
853 | TEMP_SET_PT_BOTH (PT + process_coding.produced_char, | |
854 | PT_BYTE + process_coding.produced); | |
855 | carryover = process_coding.carryover_bytes; | |
856 | if (carryover > 0) | |
857 | memcpy (buf, process_coding.carryover, | |
858 | process_coding.carryover_bytes); | |
859 | } | |
860 | } | |
c5bfa12b | 861 | |
19ed11ba AS |
862 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
863 | break; | |
6e3bfbb2 | 864 | |
19ed11ba AS |
865 | /* Make the buffer bigger as we continue to read more data, |
866 | but not past CALLPROC_BUFFER_SIZE_MAX. */ | |
867 | if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) | |
868 | if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) | |
869 | bufsize = CALLPROC_BUFFER_SIZE_MAX; | |
6e3bfbb2 | 870 | |
19ed11ba AS |
871 | if (display_p) |
872 | { | |
873 | if (first) | |
874 | prepare_menu_bars (); | |
875 | first = 0; | |
876 | redisplay_preserve_echo_area (1); | |
877 | /* This variable might have been set to 0 for code | |
878 | detection. In that case, we set it back to 1 because | |
879 | we should have already detected a coding system. */ | |
880 | display_on_the_fly = 1; | |
881 | } | |
882 | immediate_quit = 1; | |
883 | QUIT; | |
884 | } | |
885 | give_up: ; | |
886 | ||
887 | Vlast_coding_system_used = CODING_ID_NAME (process_coding.id); | |
888 | /* If the caller required, let the buffer inherit the | |
889 | coding-system used to decode the process output. */ | |
890 | if (inherit_process_coding_system) | |
891 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
892 | make_number (total_read)); | |
893 | } | |
3b440bb5 | 894 | |
77defa9a | 895 | #ifndef MSDOS |
80856e74 | 896 | /* Wait for it to terminate, unless it already has. */ |
1ef14cb4 LMI |
897 | if (output_to_buffer) |
898 | wait_for_termination (pid); | |
899 | else | |
900 | interruptible_wait_for_termination (pid); | |
77defa9a | 901 | #endif |
80856e74 JB |
902 | |
903 | immediate_quit = 0; | |
904 | ||
37d54121 RS |
905 | /* Don't kill any children that the subprocess may have left behind |
906 | when exiting. */ | |
907 | call_process_exited = 1; | |
908 | ||
3c59b4c9 | 909 | SAFE_FREE (); |
80856e74 JB |
910 | unbind_to (count, Qnil); |
911 | ||
6b61353c KH |
912 | if (synch_process_termsig) |
913 | { | |
42ca4633 | 914 | const char *signame; |
6b61353c KH |
915 | |
916 | synchronize_system_messages_locale (); | |
917 | signame = strsignal (synch_process_termsig); | |
918 | ||
919 | if (signame == 0) | |
19ed11ba | 920 | signame = "unknown"; |
6b61353c KH |
921 | |
922 | synch_process_death = signame; | |
923 | } | |
924 | ||
80856e74 | 925 | if (synch_process_death) |
68c45bf0 PE |
926 | return code_convert_string_norecord (build_string (synch_process_death), |
927 | Vlocale_coding_system, 0); | |
80856e74 JB |
928 | return make_number (synch_process_retcode); |
929 | } | |
80856e74 | 930 | \f |
9fefd2ba | 931 | static Lisp_Object |
971de7fb | 932 | delete_temp_file (Lisp_Object name) |
80856e74 | 933 | { |
1a271e14 | 934 | /* Suppress jka-compr handling, etc. */ |
d311d28c | 935 | ptrdiff_t count = SPECPDL_INDEX (); |
1a271e14 | 936 | specbind (intern ("file-name-handler-alist"), Qnil); |
f1a5d776 | 937 | internal_delete_file (name); |
1a271e14 | 938 | unbind_to (count, Qnil); |
320695d8 | 939 | return Qnil; |
80856e74 JB |
940 | } |
941 | ||
942 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
fdb82f93 PJ |
943 | 3, MANY, 0, |
944 | doc: /* Send text from START to END to a synchronous process running PROGRAM. | |
945 | The remaining arguments are optional. | |
946 | Delete the text if fourth arg DELETE is non-nil. | |
947 | ||
1ef14cb4 LMI |
948 | Insert output in BUFFER before point; t means current buffer; nil for |
949 | BUFFER means discard it; 0 means discard and don't wait; and `(:file | |
950 | FILE)', where FILE is a file name string, means that it should be | |
1b9f60cc | 951 | written to that file (if the file already exists it is overwritten). |
fdb82f93 PJ |
952 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
953 | REAL-BUFFER says what to do with standard output, as above, | |
954 | while STDERR-FILE says what to do with standard error in the child. | |
955 | STDERR-FILE may be nil (discard standard error output), | |
956 | t (mix it with ordinary output), or a file name string. | |
957 | ||
958 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
959 | Remaining args are passed to PROGRAM at startup as command args. | |
960 | ||
ba9a5174 | 961 | If BUFFER is 0, `call-process-region' returns immediately with value nil. |
fdb82f93 PJ |
962 | Otherwise it waits for PROGRAM to terminate |
963 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
964 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
965 | ||
966 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) | |
f66c7cf8 | 967 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 968 | { |
39323a7e KH |
969 | struct gcpro gcpro1; |
970 | Lisp_Object filename_string; | |
971 | register Lisp_Object start, end; | |
d311d28c | 972 | ptrdiff_t count = SPECPDL_INDEX (); |
08ee4e87 | 973 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
09494912 | 974 | Lisp_Object coding_systems; |
32d08644 | 975 | Lisp_Object val, *args2; |
f66c7cf8 | 976 | ptrdiff_t i; |
7e6c2178 | 977 | char *tempfile; |
f92d51d8 | 978 | Lisp_Object tmpdir, pattern; |
7e6c2178 | 979 | |
f92d51d8 CY |
980 | if (STRINGP (Vtemporary_file_directory)) |
981 | tmpdir = Vtemporary_file_directory; | |
7e6c2178 RS |
982 | else |
983 | { | |
f92d51d8 CY |
984 | #ifndef DOS_NT |
985 | if (getenv ("TMPDIR")) | |
986 | tmpdir = build_string (getenv ("TMPDIR")); | |
987 | else | |
988 | tmpdir = build_string ("/tmp/"); | |
989 | #else /* DOS_NT */ | |
990 | char *outf; | |
991 | if ((outf = egetenv ("TMPDIR")) | |
992 | || (outf = egetenv ("TMP")) | |
993 | || (outf = egetenv ("TEMP"))) | |
994 | tmpdir = build_string (outf); | |
995 | else | |
996 | tmpdir = Ffile_name_as_directory (build_string ("c:/temp")); | |
0774fcf8 | 997 | #endif |
f92d51d8 | 998 | } |
7e6c2178 | 999 | |
3c59b4c9 PE |
1000 | { |
1001 | USE_SAFE_ALLOCA; | |
1002 | pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir); | |
1003 | SAFE_ALLOCA (tempfile, char *, SBYTES (pattern) + 1); | |
1004 | memcpy (tempfile, SDATA (pattern), SBYTES (pattern) + 1); | |
1005 | coding_systems = Qt; | |
09494912 | 1006 | |
1ddc85a4 | 1007 | #ifdef HAVE_MKSTEMP |
3c59b4c9 PE |
1008 | { |
1009 | int fd; | |
1010 | ||
1011 | BLOCK_INPUT; | |
1012 | fd = mkstemp (tempfile); | |
1013 | UNBLOCK_INPUT; | |
1014 | if (fd == -1) | |
1015 | report_file_error ("Failed to open temporary file", | |
baac5bc7 | 1016 | Fcons (build_string (tempfile), Qnil)); |
3c59b4c9 PE |
1017 | else |
1018 | close (fd); | |
1019 | } | |
1ddc85a4 | 1020 | #else |
3c59b4c9 | 1021 | mktemp (tempfile); |
1ddc85a4 | 1022 | #endif |
80856e74 | 1023 | |
3c59b4c9 PE |
1024 | filename_string = build_string (tempfile); |
1025 | GCPRO1 (filename_string); | |
1026 | SAFE_FREE (); | |
1027 | } | |
1028 | ||
80856e74 JB |
1029 | start = args[0]; |
1030 | end = args[1]; | |
32d08644 | 1031 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
1032 | if (!NILP (Vcoding_system_for_write)) |
1033 | val = Vcoding_system_for_write; | |
4b4deea2 | 1034 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
fcaf8878 | 1035 | val = Qraw_text; |
32d08644 | 1036 | else |
beacaab3 | 1037 | { |
3c59b4c9 | 1038 | USE_SAFE_ALLOCA; |
0065d054 | 1039 | SAFE_NALLOCA (args2, 1, nargs + 1); |
91489411 RS |
1040 | args2[0] = Qcall_process_region; |
1041 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1042 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); | |
fcaf8878 | 1043 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
3c59b4c9 | 1044 | SAFE_FREE (); |
beacaab3 | 1045 | } |
fcaf8878 | 1046 | val = complement_process_encoding_system (val); |
32d08644 | 1047 | |
168afdaa | 1048 | { |
d311d28c | 1049 | ptrdiff_t count1 = SPECPDL_INDEX (); |
168afdaa RS |
1050 | |
1051 | specbind (intern ("coding-system-for-write"), val); | |
bb951f0e KR |
1052 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
1053 | happen to get a ".Z" suffix. */ | |
1054 | specbind (intern ("file-name-handler-alist"), Qnil); | |
168afdaa RS |
1055 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil); |
1056 | ||
1057 | unbind_to (count1, Qnil); | |
1058 | } | |
91489411 | 1059 | |
177c0ea7 | 1060 | /* Note that Fcall_process takes care of binding |
91489411 | 1061 | coding-system-for-read. */ |
093650fe | 1062 | |
80856e74 JB |
1063 | record_unwind_protect (delete_temp_file, filename_string); |
1064 | ||
edf496dd | 1065 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
1066 | Fdelete_region (start, end); |
1067 | ||
edf496dd KH |
1068 | if (nargs > 3) |
1069 | { | |
1070 | args += 2; | |
1071 | nargs -= 2; | |
1072 | } | |
1073 | else | |
1074 | { | |
1075 | args[0] = args[2]; | |
1076 | nargs = 2; | |
1077 | } | |
1078 | args[1] = filename_string; | |
80856e74 | 1079 | |
edf496dd | 1080 | RETURN_UNGCPRO (unbind_to (count, Fcall_process (nargs, args))); |
80856e74 JB |
1081 | } |
1082 | \f | |
361358ea | 1083 | #ifndef WINDOWSNT |
971de7fb | 1084 | static int relocate_fd (int fd, int minfd); |
361358ea | 1085 | #endif |
dfcf069d | 1086 | |
5990851d KL |
1087 | static char ** |
1088 | add_env (char **env, char **new_env, char *string) | |
1089 | { | |
1090 | char **ep; | |
1091 | int ok = 1; | |
1092 | if (string == NULL) | |
1093 | return new_env; | |
1094 | ||
1095 | /* See if this string duplicates any string already in the env. | |
1096 | If so, don't put it in. | |
1097 | When an env var has multiple definitions, | |
1098 | we keep the definition that comes first in process-environment. */ | |
1099 | for (ep = env; ok && ep != new_env; ep++) | |
1100 | { | |
1101 | char *p = *ep, *q = string; | |
1102 | while (ok) | |
19ed11ba AS |
1103 | { |
1104 | if (*q != *p) | |
1105 | break; | |
1106 | if (*q == 0) | |
1107 | /* The string is a lone variable name; keep it for now, we | |
1108 | will remove it later. It is a placeholder for a | |
1109 | variable that is not to be included in the environment. */ | |
1110 | break; | |
1111 | if (*q == '=') | |
1112 | ok = 0; | |
1113 | p++, q++; | |
1114 | } | |
5990851d KL |
1115 | } |
1116 | if (ok) | |
1117 | *new_env++ = string; | |
1118 | return new_env; | |
1119 | } | |
1120 | ||
80856e74 JB |
1121 | /* This is the last thing run in a newly forked inferior |
1122 | either synchronous or asynchronous. | |
1123 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
1124 | Initialize inferior's priority, pgrp, connected dir and environment. | |
1125 | then exec another program based on new_argv. | |
1126 | ||
1127 | This function may change environ for the superior process. | |
1128 | Therefore, the superior process must save and restore the value | |
1129 | of environ around the vfork and the call to this function. | |
1130 | ||
80856e74 | 1131 | SET_PGRP is nonzero if we should put the subprocess into a separate |
177c0ea7 | 1132 | process group. |
e576cab4 JB |
1133 | |
1134 | CURRENT_DIR is an elisp string giving the path of the current | |
1135 | directory the subprocess should have. Since we can't really signal | |
1136 | a decent error from within the child, this should be verified as an | |
1137 | executable directory by the parent. */ | |
80856e74 | 1138 | |
dfcf069d | 1139 | int |
971de7fb | 1140 | child_setup (int in, int out, int err, register char **new_argv, int set_pgrp, Lisp_Object current_dir) |
80856e74 | 1141 | { |
e576cab4 | 1142 | char **env; |
7fcf7f05 | 1143 | char *pwd_var; |
bad95d8f RS |
1144 | #ifdef WINDOWSNT |
1145 | int cpid; | |
4252a4bd | 1146 | HANDLE handles[3]; |
bad95d8f | 1147 | #endif /* WINDOWSNT */ |
e576cab4 | 1148 | |
d311d28c | 1149 | pid_t pid = getpid (); |
80856e74 | 1150 | |
80856e74 JB |
1151 | /* Close Emacs's descriptors that this process should not have. */ |
1152 | close_process_descs (); | |
ded80a25 | 1153 | |
c17c4250 EZ |
1154 | /* DOS_NT isn't in a vfork, so if we are in the middle of load-file, |
1155 | we will lose if we call close_load_descs here. */ | |
1156 | #ifndef DOS_NT | |
4458cebe | 1157 | close_load_descs (); |
c17c4250 | 1158 | #endif |
80856e74 JB |
1159 | |
1160 | /* Note that use of alloca is always safe here. It's obvious for systems | |
1161 | that do not have true vfork or that have true (stack) alloca. | |
caa01fe0 GM |
1162 | If using vfork and C_ALLOCA (when Emacs used to include |
1163 | src/alloca.c) it is safe because that changes the superior's | |
1164 | static variables as if the superior had done alloca and will be | |
1165 | cleaned up in the usual way. */ | |
e576cab4 | 1166 | { |
7fcf7f05 | 1167 | register char *temp; |
0065d054 | 1168 | size_t i; /* size_t, because ptrdiff_t might overflow here! */ |
77d78be1 | 1169 | |
d5db4077 | 1170 | i = SBYTES (current_dir); |
16425c4a EZ |
1171 | #ifdef MSDOS |
1172 | /* MSDOS must have all environment variables malloc'ed, because | |
1173 | low-level libc functions that launch subsidiary processes rely | |
1174 | on that. */ | |
1175 | pwd_var = (char *) xmalloc (i + 6); | |
1176 | #else | |
7fcf7f05 | 1177 | pwd_var = (char *) alloca (i + 6); |
16425c4a | 1178 | #endif |
7fcf7f05 | 1179 | temp = pwd_var + 4; |
72af86bd AS |
1180 | memcpy (pwd_var, "PWD=", 4); |
1181 | memcpy (temp, SDATA (current_dir), i); | |
bad95d8f | 1182 | if (!IS_DIRECTORY_SEP (temp[i - 1])) temp[i++] = DIRECTORY_SEP; |
e576cab4 JB |
1183 | temp[i] = 0; |
1184 | ||
c17c4250 | 1185 | #ifndef DOS_NT |
e576cab4 JB |
1186 | /* We can't signal an Elisp error here; we're in a vfork. Since |
1187 | the callers check the current directory before forking, this | |
1188 | should only return an error if the directory's permissions | |
1189 | are changed between the check and this chdir, but we should | |
1190 | at least check. */ | |
1191 | if (chdir (temp) < 0) | |
20b25e46 | 1192 | _exit (errno); |
f8d23104 | 1193 | #else /* DOS_NT */ |
c17c4250 EZ |
1194 | /* Get past the drive letter, so that d:/ is left alone. */ |
1195 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
1196 | { | |
1197 | temp += 2; | |
1198 | i -= 2; | |
1199 | } | |
f8d23104 | 1200 | #endif /* DOS_NT */ |
c17c4250 | 1201 | |
7fcf7f05 | 1202 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 1203 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 1204 | temp[--i] = 0; |
e576cab4 | 1205 | } |
80856e74 | 1206 | |
5990851d | 1207 | /* Set `env' to a vector of the strings in the environment. */ |
80856e74 JB |
1208 | { |
1209 | register Lisp_Object tem; | |
1210 | register char **new_env; | |
5990851d | 1211 | char **p, **q; |
80856e74 | 1212 | register int new_length; |
d2bb6598 | 1213 | Lisp_Object display = Qnil; |
361358ea | 1214 | |
80856e74 | 1215 | new_length = 0; |
f105f403 | 1216 | |
80856e74 | 1217 | for (tem = Vprocess_environment; |
19ed11ba AS |
1218 | CONSP (tem) && STRINGP (XCAR (tem)); |
1219 | tem = XCDR (tem)) | |
d2bb6598 | 1220 | { |
42a5b22f | 1221 | if (strncmp (SSDATA (XCAR (tem)), "DISPLAY", 7) == 0 |
d2bb6598 SM |
1222 | && (SDATA (XCAR (tem)) [7] == '\0' |
1223 | || SDATA (XCAR (tem)) [7] == '=')) | |
1224 | /* DISPLAY is specified in process-environment. */ | |
1225 | display = Qt; | |
1226 | new_length++; | |
1227 | } | |
de87fb59 | 1228 | |
d2bb6598 SM |
1229 | /* If not provided yet, use the frame's DISPLAY. */ |
1230 | if (NILP (display)) | |
1231 | { | |
1232 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); | |
1233 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) | |
1234 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1235 | tmp = Fgetenv_internal (build_string ("DISPLAY"), | |
1236 | Vinitial_environment); | |
1237 | if (STRINGP (tmp)) | |
1238 | { | |
1239 | display = tmp; | |
1240 | new_length++; | |
1241 | } | |
1242 | } | |
80856e74 | 1243 | |
7fcf7f05 RS |
1244 | /* new_length + 2 to include PWD and terminating 0. */ |
1245 | env = new_env = (char **) alloca ((new_length + 2) * sizeof (char *)); | |
7fcf7f05 RS |
1246 | /* If we have a PWD envvar, pass one down, |
1247 | but with corrected value. */ | |
a13f8f50 | 1248 | if (egetenv ("PWD")) |
7fcf7f05 | 1249 | *new_env++ = pwd_var; |
361358ea | 1250 | |
6b8e474c | 1251 | if (STRINGP (display)) |
de87fb59 | 1252 | { |
35016e9a | 1253 | char *vdata = (char *) alloca (sizeof "DISPLAY=" + SBYTES (display)); |
de87fb59 | 1254 | strcpy (vdata, "DISPLAY="); |
42a5b22f | 1255 | strcat (vdata, SSDATA (display)); |
de87fb59 DN |
1256 | new_env = add_env (env, new_env, vdata); |
1257 | } | |
80856e74 | 1258 | |
5990851d | 1259 | /* Overrides. */ |
80856e74 | 1260 | for (tem = Vprocess_environment; |
70949dac KR |
1261 | CONSP (tem) && STRINGP (XCAR (tem)); |
1262 | tem = XCDR (tem)) | |
42a5b22f | 1263 | new_env = add_env (env, new_env, SSDATA (XCAR (tem))); |
d2bb6598 | 1264 | |
5990851d KL |
1265 | *new_env = 0; |
1266 | ||
1267 | /* Remove variable names without values. */ | |
1268 | p = q = env; | |
1269 | while (*p != 0) | |
cd9565ba | 1270 | { |
19ed11ba AS |
1271 | while (*q != 0 && strchr (*q, '=') == NULL) |
1272 | q++; | |
1273 | *p = *q++; | |
1274 | if (*p != 0) | |
1275 | p++; | |
cd9565ba | 1276 | } |
80856e74 | 1277 | } |
de87fb59 | 1278 | |
361358ea | 1279 | |
bad95d8f RS |
1280 | #ifdef WINDOWSNT |
1281 | prepare_standard_handles (in, out, err, handles); | |
d5db4077 | 1282 | set_process_dir (SDATA (current_dir)); |
67802943 DN |
1283 | /* Spawn the child. (See ntproc.c:Spawnve). */ |
1284 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); | |
1285 | reset_standard_handles (in, out, err, handles); | |
1286 | if (cpid == -1) | |
1287 | /* An error occurred while trying to spawn the process. */ | |
1288 | report_file_error ("Spawning child process", Qnil); | |
1289 | return cpid; | |
1290 | ||
bad95d8f | 1291 | #else /* not WINDOWSNT */ |
426b37ae JB |
1292 | /* Make sure that in, out, and err are not actually already in |
1293 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1294 | started with its standard in, out, or error closed, as might |
426b37ae | 1295 | happen under X. */ |
f29f9e4a RS |
1296 | { |
1297 | int oin = in, oout = out; | |
1298 | ||
1299 | /* We have to avoid relocating the same descriptor twice! */ | |
1300 | ||
1301 | in = relocate_fd (in, 3); | |
1302 | ||
1303 | if (out == oin) | |
1304 | out = in; | |
1305 | else | |
3e9367e7 | 1306 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1307 | |
1308 | if (err == oin) | |
1309 | err = in; | |
1310 | else if (err == oout) | |
1311 | err = out; | |
1312 | else | |
3e9367e7 | 1313 | err = relocate_fd (err, 3); |
f29f9e4a | 1314 | } |
426b37ae | 1315 | |
c17c4250 | 1316 | #ifndef MSDOS |
68c45bf0 PE |
1317 | emacs_close (0); |
1318 | emacs_close (1); | |
1319 | emacs_close (2); | |
80856e74 JB |
1320 | |
1321 | dup2 (in, 0); | |
1322 | dup2 (out, 1); | |
1323 | dup2 (err, 2); | |
68c45bf0 | 1324 | emacs_close (in); |
ce8f5a9a AS |
1325 | if (out != in) |
1326 | emacs_close (out); | |
1327 | if (err != in && err != out) | |
1328 | emacs_close (err); | |
80856e74 | 1329 | |
5e617bc2 | 1330 | #if defined (USG) |
fdba8590 | 1331 | #ifndef SETPGRP_RELEASES_CTTY |
e576cab4 | 1332 | setpgrp (); /* No arguments but equivalent in this case */ |
fdba8590 | 1333 | #endif |
67802943 | 1334 | #else /* not USG */ |
e576cab4 | 1335 | setpgrp (pid, pid); |
67802943 | 1336 | #endif /* not USG */ |
80856e74 | 1337 | |
a7ebc409 | 1338 | /* setpgrp_of_tty is incorrect here; it uses input_fd. */ |
12e610e8 | 1339 | tcsetpgrp (0, pid); |
a7ebc409 | 1340 | |
80856e74 JB |
1341 | /* execvp does not accept an environment arg so the only way |
1342 | to pass this environment is to set environ. Our caller | |
1343 | is responsible for restoring the ambient value of environ. */ | |
1344 | environ = env; | |
1345 | execvp (new_argv[0], new_argv); | |
1346 | ||
68c45bf0 PE |
1347 | emacs_write (1, "Can't exec program: ", 20); |
1348 | emacs_write (1, new_argv[0], strlen (new_argv[0])); | |
1349 | emacs_write (1, "\n", 1); | |
80856e74 | 1350 | _exit (1); |
67802943 DN |
1351 | |
1352 | #else /* MSDOS */ | |
1353 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
1354 | xfree (pwd_var); | |
1355 | if (pid == -1) | |
1356 | /* An error occurred while trying to run the subprocess. */ | |
1357 | report_file_error ("Spawning child process", Qnil); | |
1358 | return pid; | |
1359 | #endif /* MSDOS */ | |
ae76d9e1 | 1360 | #endif /* not WINDOWSNT */ |
80856e74 JB |
1361 | } |
1362 | ||
361358ea | 1363 | #ifndef WINDOWSNT |
a3833dfe | 1364 | /* Move the file descriptor FD so that its number is not less than MINFD. |
426b37ae | 1365 | If the file descriptor is moved at all, the original is freed. */ |
dfcf069d | 1366 | static int |
971de7fb | 1367 | relocate_fd (int fd, int minfd) |
426b37ae | 1368 | { |
a3833dfe | 1369 | if (fd >= minfd) |
426b37ae JB |
1370 | return fd; |
1371 | else | |
1372 | { | |
cf237e27 AS |
1373 | int new; |
1374 | #ifdef F_DUPFD | |
1375 | new = fcntl (fd, F_DUPFD, minfd); | |
1376 | #else | |
1377 | new = dup (fd); | |
1378 | if (new != -1) | |
1379 | /* Note that we hold the original FD open while we recurse, | |
1380 | to guarantee we'll get a new FD if we need it. */ | |
1381 | new = relocate_fd (new, minfd); | |
1382 | #endif | |
426b37ae JB |
1383 | if (new == -1) |
1384 | { | |
cb1d0ef7 | 1385 | const char *message_1 = "Error while setting up child: "; |
a8fe7202 | 1386 | const char *errmessage = strerror (errno); |
cb1d0ef7 PE |
1387 | const char *message_2 = "\n"; |
1388 | emacs_write (2, message_1, strlen (message_1)); | |
68c45bf0 | 1389 | emacs_write (2, errmessage, strlen (errmessage)); |
cb1d0ef7 | 1390 | emacs_write (2, message_2, strlen (message_2)); |
426b37ae JB |
1391 | _exit (1); |
1392 | } | |
68c45bf0 | 1393 | emacs_close (fd); |
426b37ae JB |
1394 | return new; |
1395 | } | |
1396 | } | |
361358ea | 1397 | #endif /* not WINDOWSNT */ |
426b37ae | 1398 | |
012c6fcb | 1399 | static int |
989f33ba PE |
1400 | getenv_internal_1 (const char *var, ptrdiff_t varlen, char **value, |
1401 | ptrdiff_t *valuelen, Lisp_Object env) | |
012c6fcb | 1402 | { |
db699fc6 | 1403 | for (; CONSP (env); env = XCDR (env)) |
012c6fcb | 1404 | { |
db699fc6 | 1405 | Lisp_Object entry = XCAR (env); |
d50d3dc8 | 1406 | if (STRINGP (entry) |
db699fc6 | 1407 | && SBYTES (entry) >= varlen |
bad95d8f RS |
1408 | #ifdef WINDOWSNT |
1409 | /* NT environment variables are case insensitive. */ | |
d5db4077 | 1410 | && ! strnicmp (SDATA (entry), var, varlen) |
bad95d8f | 1411 | #else /* not WINDOWSNT */ |
72af86bd | 1412 | && ! memcmp (SDATA (entry), var, varlen) |
bad95d8f | 1413 | #endif /* not WINDOWSNT */ |
a9971c6d | 1414 | ) |
012c6fcb | 1415 | { |
db699fc6 SM |
1416 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') |
1417 | { | |
51b59d79 | 1418 | *value = SSDATA (entry) + (varlen + 1); |
db699fc6 SM |
1419 | *valuelen = SBYTES (entry) - (varlen + 1); |
1420 | return 1; | |
1421 | } | |
1422 | else if (SBYTES (entry) == varlen) | |
1423 | { | |
1424 | /* Lone variable names in Vprocess_environment mean that | |
1425 | variable should be removed from the environment. */ | |
1426 | *value = NULL; | |
1427 | return 1; | |
1428 | } | |
1429 | } | |
1430 | } | |
1431 | return 0; | |
1432 | } | |
1433 | ||
012c6fcb | 1434 | static int |
989f33ba PE |
1435 | getenv_internal (const char *var, ptrdiff_t varlen, char **value, |
1436 | ptrdiff_t *valuelen, Lisp_Object frame) | |
012c6fcb | 1437 | { |
d2bb6598 SM |
1438 | /* Try to find VAR in Vprocess_environment first. */ |
1439 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1440 | Vprocess_environment)) | |
1441 | return *value ? 1 : 0; | |
f105f403 | 1442 | |
d2bb6598 | 1443 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
de87fb59 | 1444 | if (strcmp (var, "DISPLAY") == 0) |
d2bb6598 SM |
1445 | { |
1446 | Lisp_Object display | |
1447 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); | |
1448 | if (STRINGP (display)) | |
1449 | { | |
51b59d79 | 1450 | *value = SSDATA (display); |
de87fb59 | 1451 | *valuelen = SBYTES (display); |
012c6fcb JA |
1452 | return 1; |
1453 | } | |
d2bb6598 SM |
1454 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
1455 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1456 | Vinitial_environment)) | |
1457 | return *value ? 1 : 0; | |
012c6fcb JA |
1458 | } |
1459 | ||
1460 | return 0; | |
1461 | } | |
1462 | ||
f105f403 | 1463 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
5990851d KL |
1464 | doc: /* Get the value of environment variable VARIABLE. |
1465 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
1466 | the environment. Otherwise, value is a string. | |
f105f403 | 1467 | |
acf20901 | 1468 | This function searches `process-environment' for VARIABLE. |
5990851d | 1469 | |
db699fc6 | 1470 | If optional parameter ENV is a list, then search this list instead of |
acf20901 JB |
1471 | `process-environment', and return t when encountering a negative entry |
1472 | \(an entry for a variable with no value). */) | |
5842a27b | 1473 | (Lisp_Object variable, Lisp_Object env) |
012c6fcb JA |
1474 | { |
1475 | char *value; | |
989f33ba | 1476 | ptrdiff_t valuelen; |
012c6fcb | 1477 | |
5990851d | 1478 | CHECK_STRING (variable); |
db699fc6 SM |
1479 | if (CONSP (env)) |
1480 | { | |
42a5b22f | 1481 | if (getenv_internal_1 (SSDATA (variable), SBYTES (variable), |
db699fc6 SM |
1482 | &value, &valuelen, env)) |
1483 | return value ? make_string (value, valuelen) : Qt; | |
1484 | else | |
1485 | return Qnil; | |
1486 | } | |
42a5b22f | 1487 | else if (getenv_internal (SSDATA (variable), SBYTES (variable), |
d2bb6598 | 1488 | &value, &valuelen, env)) |
012c6fcb JA |
1489 | return make_string (value, valuelen); |
1490 | else | |
1491 | return Qnil; | |
1492 | } | |
1493 | ||
5990851d KL |
1494 | /* A version of getenv that consults the Lisp environment lists, |
1495 | easily callable from C. */ | |
012c6fcb | 1496 | char * |
a8fe7202 | 1497 | egetenv (const char *var) |
012c6fcb JA |
1498 | { |
1499 | char *value; | |
25c7e41f | 1500 | ptrdiff_t valuelen; |
012c6fcb | 1501 | |
f105f403 | 1502 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
012c6fcb JA |
1503 | return value; |
1504 | else | |
1505 | return 0; | |
1506 | } | |
1507 | ||
80856e74 | 1508 | \f |
8de15d69 | 1509 | /* This is run before init_cmdargs. */ |
177c0ea7 | 1510 | |
dfcf069d | 1511 | void |
971de7fb | 1512 | init_callproc_1 (void) |
8de15d69 RS |
1513 | { |
1514 | char *data_dir = egetenv ("EMACSDATA"); | |
35a2f4b8 KH |
1515 | char *doc_dir = egetenv ("EMACSDOC"); |
1516 | ||
8de15d69 | 1517 | Vdata_directory |
177c0ea7 | 1518 | = Ffile_name_as_directory (build_string (data_dir ? data_dir |
8de15d69 | 1519 | : PATH_DATA)); |
35a2f4b8 KH |
1520 | Vdoc_directory |
1521 | = Ffile_name_as_directory (build_string (doc_dir ? doc_dir | |
1522 | : PATH_DOC)); | |
9453ea7b | 1523 | |
e576cab4 | 1524 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1525 | PATH_EXEC path from epaths.h. */ |
e576cab4 | 1526 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); |
80856e74 JB |
1527 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
1528 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
8de15d69 RS |
1529 | } |
1530 | ||
e17f7533 | 1531 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1532 | |
dfcf069d | 1533 | void |
971de7fb | 1534 | init_callproc (void) |
8de15d69 RS |
1535 | { |
1536 | char *data_dir = egetenv ("EMACSDATA"); | |
177c0ea7 | 1537 | |
8de15d69 RS |
1538 | register char * sh; |
1539 | Lisp_Object tempdir; | |
1540 | ||
9cc4fad5 | 1541 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1542 | { |
05630743 RS |
1543 | /* Add to the path the lib-src subdir of the installation dir. */ |
1544 | Lisp_Object tem; | |
1545 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1546 | Vinstallation_directory); | |
bad95d8f | 1547 | #ifndef DOS_NT |
1a6640ec | 1548 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc | 1549 | if (NILP (Fmember (tem, Vexec_path))) |
70ec1377 RS |
1550 | { |
1551 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); | |
1552 | Vexec_path = Fcons (tem, Vexec_path); | |
1553 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
1554 | } | |
177c0ea7 | 1555 | |
0fa248bc | 1556 | Vexec_directory = Ffile_name_as_directory (tem); |
bad95d8f | 1557 | #endif /* not DOS_NT */ |
8de15d69 | 1558 | |
e17f7533 RS |
1559 | /* Maybe use ../etc as well as ../lib-src. */ |
1560 | if (data_dir == 0) | |
1561 | { | |
1562 | tem = Fexpand_file_name (build_string ("etc"), | |
1563 | Vinstallation_directory); | |
1564 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1565 | } |
1566 | } | |
7e933683 RS |
1567 | |
1568 | /* Look for the files that should be in etc. We don't use | |
1569 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1570 | near the executable, and they are never in the build |
7e933683 RS |
1571 | directory when that's different from the source directory. |
1572 | ||
1573 | Instead, if these files are not in the nominal place, we try the | |
1574 | source directory. */ | |
1575 | if (data_dir == 0) | |
1576 | { | |
70ec1377 | 1577 | Lisp_Object tem, tem1, srcdir; |
7e933683 | 1578 | |
70ec1377 RS |
1579 | srcdir = Fexpand_file_name (build_string ("../src/"), |
1580 | build_string (PATH_DUMPLOADSEARCH)); | |
7e933683 RS |
1581 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); |
1582 | tem1 = Ffile_exists_p (tem); | |
70ec1377 | 1583 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
7e933683 | 1584 | { |
70ec1377 | 1585 | Lisp_Object newdir; |
7e933683 RS |
1586 | newdir = Fexpand_file_name (build_string ("../etc/"), |
1587 | build_string (PATH_DUMPLOADSEARCH)); | |
1588 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1589 | tem1 = Ffile_exists_p (tem); | |
1590 | if (!NILP (tem1)) | |
1591 | Vdata_directory = newdir; | |
1592 | } | |
1593 | } | |
80856e74 | 1594 | |
d883eb62 RS |
1595 | #ifndef CANNOT_DUMP |
1596 | if (initialized) | |
1597 | #endif | |
1598 | { | |
1599 | tempdir = Fdirectory_file_name (Vexec_directory); | |
42a5b22f | 1600 | if (access (SSDATA (tempdir), 0) < 0) |
d883eb62 RS |
1601 | dir_warning ("Warning: arch-dependent data dir (%s) does not exist.\n", |
1602 | Vexec_directory); | |
1603 | } | |
80856e74 | 1604 | |
e576cab4 | 1605 | tempdir = Fdirectory_file_name (Vdata_directory); |
42a5b22f | 1606 | if (access (SSDATA (tempdir), 0) < 0) |
76d5c6cf RS |
1607 | dir_warning ("Warning: arch-independent data dir (%s) does not exist.\n", |
1608 | Vdata_directory); | |
e576cab4 | 1609 | |
e576cab4 | 1610 | sh = (char *) getenv ("SHELL"); |
80856e74 | 1611 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
8abd035b | 1612 | |
40b49d4b JB |
1613 | #ifdef DOS_NT |
1614 | Vshared_game_score_directory = Qnil; | |
1615 | #else | |
63789758 RS |
1616 | Vshared_game_score_directory = build_string (PATH_GAME); |
1617 | if (NILP (Ffile_directory_p (Vshared_game_score_directory))) | |
1618 | Vshared_game_score_directory = Qnil; | |
40b49d4b | 1619 | #endif |
9fefd2ba JB |
1620 | } |
1621 | ||
dfcf069d | 1622 | void |
971de7fb | 1623 | set_initial_environment (void) |
9fefd2ba | 1624 | { |
738db178 DN |
1625 | char **envp; |
1626 | for (envp = environ; *envp; envp++) | |
1627 | Vprocess_environment = Fcons (build_string (*envp), | |
1628 | Vprocess_environment); | |
1629 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent | |
1630 | to use `delete' and friends on process-environment. */ | |
1631 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); | |
80856e74 JB |
1632 | } |
1633 | ||
dfcf069d | 1634 | void |
971de7fb | 1635 | syms_of_callproc (void) |
80856e74 | 1636 | { |
f92d51d8 CY |
1637 | #ifndef DOS_NT |
1638 | Vtemp_file_name_pattern = build_string ("emacsXXXXXX"); | |
1639 | #elif defined (WINDOWSNT) | |
1640 | Vtemp_file_name_pattern = build_string ("emXXXXXX"); | |
1641 | #else | |
1642 | Vtemp_file_name_pattern = build_string ("detmp.XXX"); | |
1643 | #endif | |
1644 | staticpro (&Vtemp_file_name_pattern); | |
1645 | ||
29208e82 | 1646 | DEFVAR_LISP ("shell-file-name", Vshell_file_name, |
fb7ada5f | 1647 | doc: /* File name to load inferior shells from. |
b20b29be EZ |
1648 | Initialized from the SHELL environment variable, or to a system-dependent |
1649 | default if SHELL is not set. */); | |
80856e74 | 1650 | |
29208e82 | 1651 | DEFVAR_LISP ("exec-path", Vexec_path, |
fb7ada5f | 1652 | doc: /* List of directories to search programs to run in subprocesses. |
fdb82f93 | 1653 | Each element is a string (directory name) or nil (try default directory). */); |
80856e74 | 1654 | |
29208e82 | 1655 | DEFVAR_LISP ("exec-suffixes", Vexec_suffixes, |
fb7ada5f | 1656 | doc: /* List of suffixes to try to find executable file names. |
fdb82f93 | 1657 | Each element is a string. */); |
33d5af99 | 1658 | Vexec_suffixes = Qnil; |
b81a1b72 | 1659 | |
29208e82 | 1660 | DEFVAR_LISP ("exec-directory", Vexec_directory, |
fdb82f93 PJ |
1661 | doc: /* Directory for executables for Emacs to invoke. |
1662 | More generally, this includes any architecture-dependent files | |
1663 | that are built and installed from the Emacs distribution. */); | |
e576cab4 | 1664 | |
29208e82 | 1665 | DEFVAR_LISP ("data-directory", Vdata_directory, |
fdb82f93 PJ |
1666 | doc: /* Directory of machine-independent files that come with GNU Emacs. |
1667 | These are files intended for Emacs to use while it runs. */); | |
80856e74 | 1668 | |
29208e82 | 1669 | DEFVAR_LISP ("doc-directory", Vdoc_directory, |
fdb82f93 | 1670 | doc: /* Directory containing the DOC file that comes with GNU Emacs. |
ebf24b59 | 1671 | This is usually the same as `data-directory'. */); |
35a2f4b8 | 1672 | |
29208e82 | 1673 | DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory, |
fdb82f93 PJ |
1674 | doc: /* For internal use by the build procedure only. |
1675 | This is the name of the directory in which the build procedure installed | |
ebf24b59 | 1676 | Emacs's info files; the default value for `Info-default-directory-list' |
fdb82f93 | 1677 | includes this. */); |
ed61592a JB |
1678 | Vconfigure_info_directory = build_string (PATH_INFO); |
1679 | ||
29208e82 | 1680 | DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory, |
b065672a CW |
1681 | doc: /* Directory of score files for games which come with GNU Emacs. |
1682 | If this variable is nil, then Emacs is unable to use a shared directory. */); | |
40b49d4b JB |
1683 | #ifdef DOS_NT |
1684 | Vshared_game_score_directory = Qnil; | |
1685 | #else | |
63789758 | 1686 | Vshared_game_score_directory = build_string (PATH_GAME); |
40b49d4b | 1687 | #endif |
b065672a | 1688 | |
29208e82 | 1689 | DEFVAR_LISP ("initial-environment", Vinitial_environment, |
6b8e474c SM |
1690 | doc: /* List of environment variables inherited from the parent process. |
1691 | Each element should be a string of the form ENVVARNAME=VALUE. | |
1692 | The elements must normally be decoded (using `locale-coding-system') for use. */); | |
1693 | Vinitial_environment = Qnil; | |
1694 | ||
29208e82 | 1695 | DEFVAR_LISP ("process-environment", Vprocess_environment, |
5990851d | 1696 | doc: /* List of overridden environment variables for subprocesses to inherit. |
fdb82f93 | 1697 | Each element should be a string of the form ENVVARNAME=VALUE. |
5990851d | 1698 | |
a13f8f50 KL |
1699 | Entries in this list take precedence to those in the frame-local |
1700 | environments. Therefore, let-binding `process-environment' is an easy | |
1701 | way to temporarily change the value of an environment variable, | |
1702 | irrespective of where it comes from. To use `process-environment' to | |
1703 | remove an environment variable, include only its name in the list, | |
1704 | without "=VALUE". | |
5990851d KL |
1705 | |
1706 | This variable is set to nil when Emacs starts. | |
1707 | ||
fdb82f93 PJ |
1708 | If multiple entries define the same variable, the first one always |
1709 | takes precedence. | |
5990851d | 1710 | |
776a24a1 | 1711 | Non-ASCII characters are encoded according to the initial value of |
5990851d KL |
1712 | `locale-coding-system', i.e. the elements must normally be decoded for |
1713 | use. | |
1714 | ||
776a24a1 | 1715 | See `setenv' and `getenv'. */); |
86f5ca04 | 1716 | Vprocess_environment = Qnil; |
80856e74 | 1717 | |
80856e74 | 1718 | defsubr (&Scall_process); |
83fa009c | 1719 | defsubr (&Sgetenv_internal); |
e576cab4 | 1720 | defsubr (&Scall_process_region); |
80856e74 | 1721 | } |