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" |
aba637ec | 54 | #include "blockinput.h" |
f105f403 KL |
55 | #include "frame.h" |
56 | #include "termhooks.h" | |
80856e74 | 57 | |
5f027cea EZ |
58 | #ifdef MSDOS |
59 | #include "msdos.h" | |
60 | #endif | |
61 | ||
d01ba2f1 GM |
62 | #ifdef HAVE_NS |
63 | #include "nsterm.h" | |
64 | #endif | |
65 | ||
f95c3f91 | 66 | #ifdef HAVE_SETPGID |
58eb6cf0 | 67 | #if !defined (USG) |
320695d8 | 68 | #undef setpgrp |
f95c3f91 GM |
69 | #define setpgrp setpgid |
70 | #endif | |
2b7e8799 | 71 | #endif |
f95c3f91 | 72 | |
f92d51d8 CY |
73 | /* Pattern used by call-process-region to make temp files. */ |
74 | static Lisp_Object Vtemp_file_name_pattern; | |
75 | ||
e0f24100 | 76 | /* True if we are about to fork off a synchronous process or if we |
80856e74 | 77 | are waiting for it. */ |
2f221583 | 78 | bool synch_process_alive; |
80856e74 JB |
79 | |
80 | /* Nonzero => this is a string explaining death of synchronous subprocess. */ | |
42ca4633 | 81 | const char *synch_process_death; |
80856e74 | 82 | |
6b61353c KH |
83 | /* Nonzero => this is the signal number that terminated the subprocess. */ |
84 | int synch_process_termsig; | |
85 | ||
80856e74 JB |
86 | /* If synch_process_death is zero, |
87 | this is exit code of synchronous subprocess. */ | |
88 | int synch_process_retcode; | |
f105f403 | 89 | |
80856e74 | 90 | \f |
37d54121 RS |
91 | /* Clean up when exiting Fcall_process. |
92 | On MSDOS, delete the temporary file on any kind of termination. | |
93 | On Unix, kill the process and any children on termination by signal. */ | |
94 | ||
2f221583 PE |
95 | /* True if this is termination due to exit. */ |
96 | static bool call_process_exited; | |
37d54121 | 97 | |
d177f194 | 98 | static Lisp_Object |
971de7fb | 99 | call_process_kill (Lisp_Object fdpid) |
d177f194 | 100 | { |
d311d28c PE |
101 | int fd; |
102 | pid_t pid; | |
103 | CONS_TO_INTEGER (Fcar (fdpid), int, fd); | |
104 | CONS_TO_INTEGER (Fcdr (fdpid), pid_t, pid); | |
105 | emacs_close (fd); | |
106 | EMACS_KILLPG (pid, SIGKILL); | |
d177f194 JB |
107 | synch_process_alive = 0; |
108 | return Qnil; | |
109 | } | |
110 | ||
7710357c | 111 | static Lisp_Object |
971de7fb | 112 | call_process_cleanup (Lisp_Object arg) |
80856e74 | 113 | { |
ad3aaf33 | 114 | Lisp_Object fdpid = Fcdr (arg); |
d311d28c | 115 | int fd; |
ad3aaf33 AS |
116 | #if defined (MSDOS) |
117 | Lisp_Object file; | |
118 | #else | |
d311d28c | 119 | pid_t pid; |
ad3aaf33 AS |
120 | #endif |
121 | ||
122 | Fset_buffer (Fcar (arg)); | |
d311d28c | 123 | CONS_TO_INTEGER (Fcar (fdpid), int, fd); |
ad3aaf33 | 124 | |
e39a993c | 125 | #if defined (MSDOS) |
7e6c2178 | 126 | /* for MSDOS fdpid is really (fd . tempfile) */ |
c1350752 | 127 | file = Fcdr (fdpid); |
888c9e86 EZ |
128 | /* FD is -1 and FILE is "" when we didn't actually create a |
129 | temporary file in call-process. */ | |
130 | if (fd >= 0) | |
131 | emacs_close (fd); | |
132 | if (!(strcmp (SDATA (file), NULL_DEVICE) == 0 || SREF (file, 0) == '\0')) | |
d5db4077 | 133 | unlink (SDATA (file)); |
e39a993c | 134 | #else /* not MSDOS */ |
d311d28c | 135 | CONS_TO_INTEGER (Fcdr (fdpid), pid_t, pid); |
d177f194 | 136 | |
37d54121 | 137 | if (call_process_exited) |
6b6e798b | 138 | { |
d311d28c | 139 | emacs_close (fd); |
6b6e798b RS |
140 | return Qnil; |
141 | } | |
37d54121 | 142 | |
d177f194 JB |
143 | if (EMACS_KILLPG (pid, SIGINT) == 0) |
144 | { | |
d311d28c | 145 | ptrdiff_t count = SPECPDL_INDEX (); |
d177f194 JB |
146 | record_unwind_protect (call_process_kill, fdpid); |
147 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); | |
148 | immediate_quit = 1; | |
149 | QUIT; | |
150 | wait_for_termination (pid); | |
151 | immediate_quit = 0; | |
152 | specpdl_ptr = specpdl + count; /* Discard the unwind protect. */ | |
153 | message1 ("Waiting for process to die...done"); | |
154 | } | |
80856e74 | 155 | synch_process_alive = 0; |
d311d28c | 156 | emacs_close (fd); |
7e6c2178 | 157 | #endif /* not MSDOS */ |
80856e74 JB |
158 | return Qnil; |
159 | } | |
160 | ||
a7ca3326 | 161 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, |
fdb82f93 PJ |
162 | doc: /* Call PROGRAM synchronously in separate process. |
163 | The remaining arguments are optional. | |
164 | The program's input comes from file INFILE (nil means `/dev/null'). | |
1ef14cb4 LMI |
165 | Insert output in BUFFER before point; t means current buffer; nil for BUFFER |
166 | means discard it; 0 means discard and don't wait; and `(:file FILE)', where | |
1b9f60cc GM |
167 | FILE is a file name string, means that it should be written to that file |
168 | \(if the file already exists it is overwritten). | |
fdb82f93 PJ |
169 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
170 | REAL-BUFFER says what to do with standard output, as above, | |
171 | while STDERR-FILE says what to do with standard error in the child. | |
172 | STDERR-FILE may be nil (discard standard error output), | |
173 | t (mix it with ordinary output), or a file name string. | |
174 | ||
175 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
176 | Remaining arguments are strings passed as command arguments to PROGRAM. | |
177 | ||
a4feb144 RS |
178 | If executable PROGRAM can't be found as an executable, `call-process' |
179 | signals a Lisp error. `call-process' reports errors in execution of | |
180 | the program only through its return and output. | |
181 | ||
fdb82f93 PJ |
182 | If BUFFER is 0, `call-process' returns immediately with value nil. |
183 | Otherwise it waits for PROGRAM to terminate | |
184 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
185 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
186 | ||
187 | usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */) | |
f66c7cf8 | 188 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 189 | { |
d311d28c | 190 | Lisp_Object infile, buffer, current_dir, path, cleanup_info_tail; |
2f221583 | 191 | bool display_p; |
80856e74 JB |
192 | int fd[2]; |
193 | int filefd; | |
4da256b1 KS |
194 | #define CALLPROC_BUFFER_SIZE_MIN (16 * 1024) |
195 | #define CALLPROC_BUFFER_SIZE_MAX (4 * CALLPROC_BUFFER_SIZE_MIN) | |
196 | char buf[CALLPROC_BUFFER_SIZE_MAX]; | |
197 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; | |
d311d28c PE |
198 | ptrdiff_t count = SPECPDL_INDEX (); |
199 | USE_SAFE_ALLOCA; | |
2d607244 | 200 | |
1aa83b22 | 201 | register const unsigned char **new_argv; |
39eaa782 RS |
202 | /* File to use for stderr in the child. |
203 | t means use same as standard output. */ | |
204 | Lisp_Object error_file; | |
1ef14cb4 | 205 | Lisp_Object output_file = Qnil; |
7e6c2178 | 206 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
888c9e86 | 207 | char *outf, *tempfile = NULL; |
7e6c2178 | 208 | int outfilefd; |
d311d28c PE |
209 | int pid; |
210 | #else | |
211 | pid_t pid; | |
80856e74 | 212 | #endif |
1ef14cb4 | 213 | int fd_output = -1; |
32d08644 KH |
214 | struct coding_system process_coding; /* coding-system of process output */ |
215 | struct coding_system argument_coding; /* coding-system of arguments */ | |
09494912 RS |
216 | /* Set to the return value of Ffind_operation_coding_system. */ |
217 | Lisp_Object coding_systems; | |
2f221583 | 218 | bool output_to_buffer = 1; |
09494912 RS |
219 | |
220 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ | |
221 | coding_systems = Qt; | |
32d08644 | 222 | |
b7826503 | 223 | CHECK_STRING (args[0]); |
80856e74 | 224 | |
39eaa782 RS |
225 | error_file = Qt; |
226 | ||
7e6c2178 RS |
227 | #ifndef subprocesses |
228 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
177c0ea7 | 229 | if (nargs >= 3 |
09ffb8b5 | 230 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
231 | error ("Operating system cannot handle asynchronous subprocesses"); |
232 | #endif /* subprocesses */ | |
233 | ||
09494912 | 234 | /* Decide the coding-system for giving arguments. */ |
32d08644 KH |
235 | { |
236 | Lisp_Object val, *args2; | |
f66c7cf8 | 237 | ptrdiff_t i; |
32d08644 KH |
238 | |
239 | /* If arguments are supplied, we may have to encode them. */ | |
240 | if (nargs >= 5) | |
241 | { | |
2f221583 | 242 | bool must_encode = 0; |
6e50da0a | 243 | Lisp_Object coding_attrs; |
30d57b8e | 244 | |
e7c1c20e | 245 | for (i = 4; i < nargs; i++) |
b7826503 | 246 | CHECK_STRING (args[i]); |
e7c1c20e | 247 | |
a2286b5c | 248 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
249 | if (STRING_MULTIBYTE (args[i])) |
250 | must_encode = 1; | |
251 | ||
beacaab3 KH |
252 | if (!NILP (Vcoding_system_for_write)) |
253 | val = Vcoding_system_for_write; | |
30d57b8e | 254 | else if (! must_encode) |
fcaf8878 | 255 | val = Qraw_text; |
beacaab3 | 256 | else |
32d08644 | 257 | { |
0065d054 | 258 | SAFE_NALLOCA (args2, 1, nargs + 1); |
32d08644 KH |
259 | args2[0] = Qcall_process; |
260 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 261 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 262 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
32d08644 | 263 | } |
fcaf8878 | 264 | val = complement_process_encoding_system (val); |
32d08644 | 265 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); |
6e50da0a KH |
266 | coding_attrs = CODING_ID_ATTRS (argument_coding.id); |
267 | if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs))) | |
268 | { | |
269 | /* We should not use an ASCII incompatible coding system. */ | |
270 | val = raw_text_coding_system (val); | |
271 | setup_coding_system (val, &argument_coding); | |
272 | } | |
32d08644 | 273 | } |
32d08644 KH |
274 | } |
275 | ||
e576cab4 JB |
276 | if (nargs >= 2 && ! NILP (args[1])) |
277 | { | |
4b4deea2 | 278 | infile = Fexpand_file_name (args[1], BVAR (current_buffer, directory)); |
b7826503 | 279 | CHECK_STRING (infile); |
e576cab4 | 280 | } |
80856e74 | 281 | else |
5437e9f9 | 282 | infile = build_string (NULL_DEVICE); |
80856e74 | 283 | |
e576cab4 JB |
284 | if (nargs >= 3) |
285 | { | |
39eaa782 RS |
286 | buffer = args[2]; |
287 | ||
1ef14cb4 LMI |
288 | /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT |
289 | FILE-FOR-STDERR), unless the first element is :file, in which case see | |
290 | the next paragraph. */ | |
19ed11ba AS |
291 | if (CONSP (buffer) |
292 | && (! SYMBOLP (XCAR (buffer)) | |
293 | || strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file"))) | |
39eaa782 | 294 | { |
70949dac | 295 | if (CONSP (XCDR (buffer))) |
45be8a1e | 296 | { |
a9d4f28a | 297 | Lisp_Object stderr_file; |
70949dac | 298 | stderr_file = XCAR (XCDR (buffer)); |
45be8a1e RS |
299 | |
300 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
301 | error_file = stderr_file; | |
302 | else | |
303 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
304 | } | |
305 | ||
70949dac | 306 | buffer = XCAR (buffer); |
39eaa782 | 307 | } |
044512ed | 308 | |
1ef14cb4 | 309 | /* If the buffer is (still) a list, it might be a (:file "file") spec. */ |
19ed11ba AS |
310 | if (CONSP (buffer) |
311 | && SYMBOLP (XCAR (buffer)) | |
312 | && ! strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file")) | |
1ef14cb4 LMI |
313 | { |
314 | output_file = Fexpand_file_name (XCAR (XCDR (buffer)), | |
315 | BVAR (current_buffer, directory)); | |
316 | CHECK_STRING (output_file); | |
317 | buffer = Qnil; | |
318 | } | |
319 | ||
39eaa782 RS |
320 | if (!(EQ (buffer, Qnil) |
321 | || EQ (buffer, Qt) | |
3ffde7d6 | 322 | || INTEGERP (buffer))) |
e576cab4 | 323 | { |
39eaa782 RS |
324 | Lisp_Object spec_buffer; |
325 | spec_buffer = buffer; | |
50fe359b | 326 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
327 | /* Mention the buffer name for a better error message. */ |
328 | if (NILP (buffer)) | |
b7826503 PJ |
329 | CHECK_BUFFER (spec_buffer); |
330 | CHECK_BUFFER (buffer); | |
e576cab4 JB |
331 | } |
332 | } | |
177c0ea7 | 333 | else |
e576cab4 | 334 | buffer = Qnil; |
80856e74 | 335 | |
58616e67 JB |
336 | /* Make sure that the child will be able to chdir to the current |
337 | buffer's current directory, or its unhandled equivalent. We | |
338 | can't just have the child check for an error when it does the | |
339 | chdir, since it's in a vfork. | |
340 | ||
341 | We have to GCPRO around this because Fexpand_file_name, | |
342 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
343 | might call a file name handling function. The argument list is | |
344 | protected by the caller, so all we really have to worry about is | |
345 | buffer. */ | |
346 | { | |
1ef14cb4 | 347 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
58616e67 | 348 | |
4b4deea2 | 349 | current_dir = BVAR (current_buffer, directory); |
58616e67 | 350 | |
1ef14cb4 | 351 | GCPRO5 (infile, buffer, current_dir, error_file, output_file); |
58616e67 | 352 | |
ca319910 SM |
353 | current_dir = Funhandled_file_name_directory (current_dir); |
354 | if (NILP (current_dir)) | |
355 | /* If the file name handler says that current_dir is unreachable, use | |
356 | a sensible default. */ | |
357 | current_dir = build_string ("~/"); | |
358 | current_dir = expand_and_dir_to_file (current_dir, Qnil); | |
db8454b0 CY |
359 | current_dir = Ffile_name_as_directory (current_dir); |
360 | ||
58616e67 JB |
361 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
362 | report_file_error ("Setting current directory", | |
4b4deea2 | 363 | Fcons (BVAR (current_buffer, directory), Qnil)); |
58616e67 | 364 | |
34b87689 KH |
365 | if (STRING_MULTIBYTE (infile)) |
366 | infile = ENCODE_FILE (infile); | |
367 | if (STRING_MULTIBYTE (current_dir)) | |
368 | current_dir = ENCODE_FILE (current_dir); | |
369 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) | |
370 | error_file = ENCODE_FILE (error_file); | |
1ef14cb4 LMI |
371 | if (STRINGP (output_file) && STRING_MULTIBYTE (output_file)) |
372 | output_file = ENCODE_FILE (output_file); | |
58616e67 JB |
373 | UNGCPRO; |
374 | } | |
375 | ||
d311d28c | 376 | display_p = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
80856e74 | 377 | |
42a5b22f | 378 | filefd = emacs_open (SSDATA (infile), O_RDONLY, 0); |
80856e74 JB |
379 | if (filefd < 0) |
380 | { | |
34b87689 | 381 | infile = DECODE_FILE (infile); |
e576cab4 | 382 | report_file_error ("Opening process input file", Fcons (infile, Qnil)); |
80856e74 | 383 | } |
1ef14cb4 LMI |
384 | |
385 | if (STRINGP (output_file)) | |
386 | { | |
387 | #ifdef DOS_NT | |
388 | fd_output = emacs_open (SSDATA (output_file), | |
389 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, | |
390 | S_IREAD | S_IWRITE); | |
391 | #else /* not DOS_NT */ | |
392 | fd_output = creat (SSDATA (output_file), 0666); | |
393 | #endif /* not DOS_NT */ | |
394 | if (fd_output < 0) | |
395 | { | |
396 | output_file = DECODE_FILE (output_file); | |
397 | report_file_error ("Opening process output file", | |
398 | Fcons (output_file, Qnil)); | |
19ed11ba | 399 | } |
1ef14cb4 | 400 | if (STRINGP (error_file) || NILP (error_file)) |
19ed11ba | 401 | output_to_buffer = 0; |
1ef14cb4 LMI |
402 | } |
403 | ||
80856e74 | 404 | /* Search for program; barf if not found. */ |
c52b0b34 | 405 | { |
ad3aaf33 | 406 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
c52b0b34 | 407 | |
ad3aaf33 | 408 | GCPRO4 (infile, buffer, current_dir, error_file); |
5c150961 | 409 | openp (Vexec_path, args[0], Vexec_suffixes, &path, make_number (X_OK)); |
c52b0b34 KH |
410 | UNGCPRO; |
411 | } | |
012c6fcb | 412 | if (NILP (path)) |
80856e74 | 413 | { |
68c45bf0 | 414 | emacs_close (filefd); |
80856e74 JB |
415 | report_file_error ("Searching for program", Fcons (args[0], Qnil)); |
416 | } | |
8ee8f447 RS |
417 | |
418 | /* If program file name starts with /: for quoting a magic name, | |
419 | discard that. */ | |
420 | if (SBYTES (path) > 2 && SREF (path, 0) == '/' | |
421 | && SREF (path, 1) == ':') | |
422 | path = Fsubstring (path, make_number (2), Qnil); | |
423 | ||
98c6f1e3 | 424 | new_argv = SAFE_ALLOCA ((nargs > 4 ? nargs - 2 : 2) * sizeof *new_argv); |
c364e618 KH |
425 | if (nargs > 4) |
426 | { | |
f66c7cf8 | 427 | ptrdiff_t i; |
ad3aaf33 | 428 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
c364e618 | 429 | |
ad3aaf33 | 430 | GCPRO5 (infile, buffer, current_dir, path, error_file); |
c5bfa12b KH |
431 | argument_coding.dst_multibyte = 0; |
432 | for (i = 4; i < nargs; i++) | |
c364e618 | 433 | { |
c5bfa12b KH |
434 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); |
435 | if (CODING_REQUIRE_ENCODING (&argument_coding)) | |
91183bfd KH |
436 | /* We must encode this argument. */ |
437 | args[i] = encode_coding_string (&argument_coding, args[i], 1); | |
c364e618 | 438 | } |
c5bfa12b | 439 | UNGCPRO; |
1aa83b22 AS |
440 | for (i = 4; i < nargs; i++) |
441 | new_argv[i - 3] = SDATA (args[i]); | |
442 | new_argv[i - 3] = 0; | |
c364e618 | 443 | } |
db54baaa KH |
444 | else |
445 | new_argv[1] = 0; | |
1aa83b22 | 446 | new_argv[0] = SDATA (path); |
80856e74 | 447 | |
7e6c2178 | 448 | #ifdef MSDOS /* MW, July 1993 */ |
7e6c2178 | 449 | |
888c9e86 EZ |
450 | /* If we're redirecting STDOUT to a file, that file is already open |
451 | on fd_output. */ | |
1ef14cb4 | 452 | if (fd_output < 0) |
7e6c2178 | 453 | { |
888c9e86 EZ |
454 | if ((outf = egetenv ("TMPDIR"))) |
455 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); | |
456 | else | |
457 | { | |
458 | tempfile = alloca (20); | |
459 | *tempfile = '\0'; | |
460 | } | |
461 | dostounix_filename (tempfile); | |
462 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') | |
463 | strcat (tempfile, "/"); | |
464 | strcat (tempfile, "detmp.XXX"); | |
465 | mktemp (tempfile); | |
1ef14cb4 LMI |
466 | outfilefd = creat (tempfile, S_IREAD | S_IWRITE); |
467 | if (outfilefd < 0) { | |
468 | emacs_close (filefd); | |
469 | report_file_error ("Opening process output file", | |
470 | Fcons (build_string (tempfile), Qnil)); | |
471 | } | |
7e6c2178 | 472 | } |
1ef14cb4 LMI |
473 | else |
474 | outfilefd = fd_output; | |
6f89d28a | 475 | fd[0] = filefd; |
2610078a | 476 | fd[1] = outfilefd; |
6f89d28a | 477 | #endif /* MSDOS */ |
7e6c2178 | 478 | |
d50d3dc8 | 479 | if (INTEGERP (buffer)) |
68c45bf0 | 480 | fd[1] = emacs_open (NULL_DEVICE, O_WRONLY, 0), fd[0] = -1; |
80856e74 JB |
481 | else |
482 | { | |
7e6c2178 | 483 | #ifndef MSDOS |
db92b288 GM |
484 | errno = 0; |
485 | if (pipe (fd) == -1) | |
486 | { | |
487 | emacs_close (filefd); | |
488 | report_file_error ("Creating process pipe", Qnil); | |
489 | } | |
80856e74 JB |
490 | #endif |
491 | } | |
492 | ||
493 | { | |
494 | /* child_setup must clobber environ in systems with true vfork. | |
495 | Protect it from permanent change. */ | |
496 | register char **save_environ = environ; | |
497 | register int fd1 = fd[1]; | |
39eaa782 | 498 | int fd_error = fd1; |
c0ad4ea5 AS |
499 | #ifdef HAVE_WORKING_VFORK |
500 | sigset_t procmask; | |
501 | sigset_t blocked; | |
502 | struct sigaction sigpipe_action; | |
503 | #endif | |
80856e74 | 504 | |
1ef14cb4 LMI |
505 | if (fd_output >= 0) |
506 | fd1 = fd_output; | |
80856e74 JB |
507 | |
508 | /* Record that we're about to create a synchronous process. */ | |
509 | synch_process_alive = 1; | |
510 | ||
5c03767e RS |
511 | /* These vars record information from process termination. |
512 | Clear them now before process can possibly terminate, | |
513 | to avoid timing error if process terminates soon. */ | |
514 | synch_process_death = 0; | |
515 | synch_process_retcode = 0; | |
6b61353c | 516 | synch_process_termsig = 0; |
5c03767e | 517 | |
39eaa782 | 518 | if (NILP (error_file)) |
68c45bf0 | 519 | fd_error = emacs_open (NULL_DEVICE, O_WRONLY, 0); |
39eaa782 RS |
520 | else if (STRINGP (error_file)) |
521 | { | |
522 | #ifdef DOS_NT | |
42a5b22f | 523 | fd_error = emacs_open (SSDATA (error_file), |
68c45bf0 PE |
524 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, |
525 | S_IREAD | S_IWRITE); | |
39eaa782 | 526 | #else /* not DOS_NT */ |
42a5b22f | 527 | fd_error = creat (SSDATA (error_file), 0666); |
39eaa782 RS |
528 | #endif /* not DOS_NT */ |
529 | } | |
530 | ||
531 | if (fd_error < 0) | |
532 | { | |
68c45bf0 | 533 | emacs_close (filefd); |
6f89d28a | 534 | if (fd[0] != filefd) |
68c45bf0 | 535 | emacs_close (fd[0]); |
39eaa782 | 536 | if (fd1 >= 0) |
68c45bf0 | 537 | emacs_close (fd1); |
6f89d28a MB |
538 | #ifdef MSDOS |
539 | unlink (tempfile); | |
540 | #endif | |
34b87689 KH |
541 | if (NILP (error_file)) |
542 | error_file = build_string (NULL_DEVICE); | |
543 | else if (STRINGP (error_file)) | |
544 | error_file = DECODE_FILE (error_file); | |
545 | report_file_error ("Cannot redirect stderr", Fcons (error_file, Qnil)); | |
39eaa782 | 546 | } |
89e1ec1d | 547 | |
2610078a | 548 | #ifdef MSDOS /* MW, July 1993 */ |
c17c4250 | 549 | /* Note that on MSDOS `child_setup' actually returns the child process |
2610078a KH |
550 | exit status, not its PID, so we assign it to `synch_process_retcode' |
551 | below. */ | |
c17c4250 EZ |
552 | pid = child_setup (filefd, outfilefd, fd_error, (char **) new_argv, |
553 | 0, current_dir); | |
39eaa782 | 554 | |
2610078a KH |
555 | /* Record that the synchronous process exited and note its |
556 | termination status. */ | |
557 | synch_process_alive = 0; | |
558 | synch_process_retcode = pid; | |
559 | if (synch_process_retcode < 0) /* means it couldn't be exec'ed */ | |
68c45bf0 | 560 | { |
ca9c0567 | 561 | synchronize_system_messages_locale (); |
68c45bf0 PE |
562 | synch_process_death = strerror (errno); |
563 | } | |
2610078a | 564 | |
68c45bf0 | 565 | emacs_close (outfilefd); |
2610078a | 566 | if (fd_error != outfilefd) |
68c45bf0 | 567 | emacs_close (fd_error); |
2610078a | 568 | fd1 = -1; /* No harm in closing that one! */ |
888c9e86 | 569 | if (tempfile) |
2610078a | 570 | { |
888c9e86 EZ |
571 | /* Since CRLF is converted to LF within `decode_coding', we |
572 | can always open a file with binary mode. */ | |
573 | fd[0] = emacs_open (tempfile, O_RDONLY | O_BINARY, 0); | |
574 | if (fd[0] < 0) | |
575 | { | |
576 | unlink (tempfile); | |
577 | emacs_close (filefd); | |
578 | report_file_error ("Cannot re-open temporary file", | |
7285dc67 | 579 | Fcons (build_string (tempfile), Qnil)); |
888c9e86 | 580 | } |
2610078a | 581 | } |
888c9e86 EZ |
582 | else |
583 | fd[0] = -1; /* We are not going to read from tempfile. */ | |
2610078a | 584 | #else /* not MSDOS */ |
bad95d8f | 585 | #ifdef WINDOWSNT |
2d607244 RS |
586 | pid = child_setup (filefd, fd1, fd_error, (char **) new_argv, |
587 | 0, current_dir); | |
bad95d8f | 588 | #else /* not WINDOWSNT */ |
c0ad4ea5 AS |
589 | |
590 | #ifdef HAVE_WORKING_VFORK | |
591 | /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal', | |
592 | this sets the parent's signal handlers as well as the child's. | |
593 | So delay all interrupts whose handlers the child might munge, | |
594 | and record the current handlers so they can be restored later. */ | |
595 | sigemptyset (&blocked); | |
596 | sigaddset (&blocked, SIGPIPE); | |
597 | sigaction (SIGPIPE, 0, &sigpipe_action); | |
123403e4 | 598 | pthread_sigmask (SIG_BLOCK, &blocked, &procmask); |
c0ad4ea5 AS |
599 | #endif |
600 | ||
aba637ec KS |
601 | BLOCK_INPUT; |
602 | ||
db6c0e74 | 603 | /* vfork, and prevent local vars from being clobbered by the vfork. */ |
b08a63cc | 604 | { |
c74e9d86 PE |
605 | Lisp_Object volatile buffer_volatile = buffer; |
606 | Lisp_Object volatile coding_systems_volatile = coding_systems; | |
607 | Lisp_Object volatile current_dir_volatile = current_dir; | |
2f221583 PE |
608 | bool volatile display_p_volatile = display_p; |
609 | bool volatile output_to_buffer_volatile = output_to_buffer; | |
610 | bool volatile sa_must_free_volatile = sa_must_free; | |
5266b4bb | 611 | int volatile fd1_volatile = fd1; |
db6c0e74 PE |
612 | int volatile fd_error_volatile = fd_error; |
613 | int volatile fd_output_volatile = fd_output; | |
d311d28c | 614 | ptrdiff_t volatile sa_count_volatile = sa_count; |
db6c0e74 | 615 | unsigned char const **volatile new_argv_volatile = new_argv; |
80856e74 | 616 | |
db6c0e74 | 617 | pid = vfork (); |
80856e74 | 618 | |
c74e9d86 PE |
619 | buffer = buffer_volatile; |
620 | coding_systems = coding_systems_volatile; | |
621 | current_dir = current_dir_volatile; | |
d311d28c | 622 | display_p = display_p_volatile; |
5266b4bb | 623 | fd1 = fd1_volatile; |
db6c0e74 PE |
624 | fd_error = fd_error_volatile; |
625 | fd_output = fd_output_volatile; | |
626 | output_to_buffer = output_to_buffer_volatile; | |
12b3abd5 | 627 | sa_must_free = sa_must_free_volatile; |
d311d28c | 628 | sa_count = sa_count_volatile; |
db6c0e74 PE |
629 | new_argv = new_argv_volatile; |
630 | } | |
b9c7f648 | 631 | |
80856e74 JB |
632 | if (pid == 0) |
633 | { | |
634 | if (fd[0] >= 0) | |
68c45bf0 | 635 | emacs_close (fd[0]); |
1e7963c7 | 636 | #ifdef HAVE_SETSID |
19ed11ba | 637 | setsid (); |
1e7963c7 | 638 | #endif |
58eb6cf0 | 639 | #if defined (USG) |
19ed11ba | 640 | setpgrp (); |
80856e74 | 641 | #else |
19ed11ba | 642 | setpgrp (pid, pid); |
80856e74 | 643 | #endif /* USG */ |
c0ad4ea5 | 644 | |
2f9a22e2 | 645 | /* GConf causes us to ignore SIGPIPE, make sure it is restored |
c0ad4ea5 | 646 | in the child. */ |
2f9b9adb | 647 | signal (SIGPIPE, SIG_DFL); |
c0ad4ea5 | 648 | #ifdef HAVE_WORKING_VFORK |
123403e4 | 649 | pthread_sigmask (SIG_SETMASK, &procmask, 0); |
c0ad4ea5 AS |
650 | #endif |
651 | ||
2d607244 RS |
652 | child_setup (filefd, fd1, fd_error, (char **) new_argv, |
653 | 0, current_dir); | |
80856e74 | 654 | } |
aba637ec KS |
655 | |
656 | UNBLOCK_INPUT; | |
c0ad4ea5 AS |
657 | |
658 | #ifdef HAVE_WORKING_VFORK | |
659 | /* Restore the signal state. */ | |
660 | sigaction (SIGPIPE, &sigpipe_action, 0); | |
123403e4 | 661 | pthread_sigmask (SIG_SETMASK, &procmask, 0); |
c0ad4ea5 AS |
662 | #endif |
663 | ||
bad95d8f | 664 | #endif /* not WINDOWSNT */ |
cd5f8f60 RS |
665 | |
666 | /* The MSDOS case did this already. */ | |
667 | if (fd_error >= 0) | |
68c45bf0 | 668 | emacs_close (fd_error); |
2610078a | 669 | #endif /* not MSDOS */ |
80856e74 | 670 | |
80856e74 JB |
671 | environ = save_environ; |
672 | ||
6b6e798b RS |
673 | /* Close most of our fd's, but not fd[0] |
674 | since we will use that to read input from. */ | |
68c45bf0 | 675 | emacs_close (filefd); |
1ef14cb4 LMI |
676 | if (fd_output >= 0) |
677 | emacs_close (fd_output); | |
799abb26 | 678 | if (fd1 >= 0 && fd1 != fd_error) |
68c45bf0 | 679 | emacs_close (fd1); |
80856e74 JB |
680 | } |
681 | ||
682 | if (pid < 0) | |
683 | { | |
6b6e798b | 684 | if (fd[0] >= 0) |
68c45bf0 | 685 | emacs_close (fd[0]); |
80856e74 JB |
686 | report_file_error ("Doing vfork", Qnil); |
687 | } | |
688 | ||
d50d3dc8 | 689 | if (INTEGERP (buffer)) |
80856e74 | 690 | { |
6b6e798b | 691 | if (fd[0] >= 0) |
68c45bf0 | 692 | emacs_close (fd[0]); |
80856e74 JB |
693 | return Qnil; |
694 | } | |
695 | ||
6b6e798b | 696 | /* Enable sending signal if user quits below. */ |
37d54121 RS |
697 | call_process_exited = 0; |
698 | ||
5e617bc2 | 699 | #if defined (MSDOS) |
7e6c2178 | 700 | /* MSDOS needs different cleanup information. */ |
d311d28c | 701 | cleanup_info_tail = build_string (tempfile ? tempfile : ""); |
7e6c2178 | 702 | #else |
d311d28c PE |
703 | cleanup_info_tail = INTEGER_TO_CONS (pid); |
704 | #endif /* not MSDOS */ | |
80856e74 | 705 | record_unwind_protect (call_process_cleanup, |
ad3aaf33 | 706 | Fcons (Fcurrent_buffer (), |
d311d28c PE |
707 | Fcons (INTEGER_TO_CONS (fd[0]), |
708 | cleanup_info_tail))); | |
80856e74 | 709 | |
d50d3dc8 | 710 | if (BUFFERP (buffer)) |
80856e74 JB |
711 | Fset_buffer (buffer); |
712 | ||
09494912 RS |
713 | if (NILP (buffer)) |
714 | { | |
715 | /* If BUFFER is nil, we must read process output once and then | |
716 | discard it, so setup coding system but with nil. */ | |
717 | setup_coding_system (Qnil, &process_coding); | |
659afede | 718 | process_coding.dst_multibyte = 0; |
09494912 RS |
719 | } |
720 | else | |
721 | { | |
722 | Lisp_Object val, *args2; | |
723 | ||
724 | val = Qnil; | |
725 | if (!NILP (Vcoding_system_for_read)) | |
726 | val = Vcoding_system_for_read; | |
727 | else | |
728 | { | |
729 | if (EQ (coding_systems, Qt)) | |
730 | { | |
f66c7cf8 | 731 | ptrdiff_t i; |
09494912 | 732 | |
0065d054 | 733 | SAFE_NALLOCA (args2, 1, nargs + 1); |
09494912 RS |
734 | args2[0] = Qcall_process; |
735 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
736 | coding_systems | |
737 | = Ffind_operation_coding_system (nargs + 1, args2); | |
738 | } | |
739 | if (CONSP (coding_systems)) | |
70949dac | 740 | val = XCAR (coding_systems); |
09494912 | 741 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 742 | val = XCAR (Vdefault_process_coding_system); |
09494912 RS |
743 | else |
744 | val = Qnil; | |
745 | } | |
91183bfd | 746 | Fcheck_coding_system (val); |
09494912 RS |
747 | /* In unibyte mode, character code conversion should not take |
748 | place but EOL conversion should. So, setup raw-text or one | |
749 | of the subsidiary according to the information just setup. */ | |
4b4deea2 | 750 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
09494912 | 751 | && !NILP (val)) |
91183bfd KH |
752 | val = raw_text_coding_system (val); |
753 | setup_coding_system (val, &process_coding); | |
659afede KH |
754 | process_coding.dst_multibyte |
755 | = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); | |
09494912 | 756 | } |
a0241d01 | 757 | process_coding.src_multibyte = 0; |
09494912 | 758 | |
80856e74 JB |
759 | immediate_quit = 1; |
760 | QUIT; | |
761 | ||
1ef14cb4 | 762 | if (output_to_buffer) |
19ed11ba | 763 | { |
2f221583 PE |
764 | int nread; |
765 | bool first = 1; | |
19ed11ba AS |
766 | EMACS_INT total_read = 0; |
767 | int carryover = 0; | |
2f221583 | 768 | bool display_on_the_fly = display_p; |
19ed11ba AS |
769 | struct coding_system saved_coding; |
770 | ||
771 | saved_coding = process_coding; | |
772 | while (1) | |
773 | { | |
774 | /* Repeatedly read until we've filled as much as possible | |
775 | of the buffer size we have. But don't read | |
776 | less than 1024--save that for the next bufferful. */ | |
777 | nread = carryover; | |
778 | while (nread < bufsize - 1024) | |
779 | { | |
780 | int this_read = emacs_read (fd[0], buf + nread, | |
781 | bufsize - nread); | |
60558b19 | 782 | |
19ed11ba AS |
783 | if (this_read < 0) |
784 | goto give_up; | |
60558b19 | 785 | |
19ed11ba AS |
786 | if (this_read == 0) |
787 | { | |
788 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
789 | break; | |
790 | } | |
60558b19 | 791 | |
19ed11ba AS |
792 | nread += this_read; |
793 | total_read += this_read; | |
60558b19 | 794 | |
19ed11ba AS |
795 | if (display_on_the_fly) |
796 | break; | |
797 | } | |
60558b19 | 798 | |
19ed11ba AS |
799 | /* Now NREAD is the total amount of data in the buffer. */ |
800 | immediate_quit = 0; | |
177c0ea7 | 801 | |
19ed11ba AS |
802 | if (!NILP (buffer)) |
803 | { | |
804 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) | |
805 | && ! CODING_MAY_REQUIRE_DECODING (&process_coding)) | |
806 | insert_1_both (buf, nread, nread, 0, 1, 0); | |
807 | else | |
808 | { /* We have to decode the input. */ | |
809 | Lisp_Object curbuf; | |
d311d28c | 810 | ptrdiff_t count1 = SPECPDL_INDEX (); |
19ed11ba AS |
811 | |
812 | XSETBUFFER (curbuf, current_buffer); | |
813 | /* We cannot allow after-change-functions be run | |
814 | during decoding, because that might modify the | |
815 | buffer, while we rely on process_coding.produced to | |
816 | faithfully reflect inserted text until we | |
817 | TEMP_SET_PT_BOTH below. */ | |
818 | specbind (Qinhibit_modification_hooks, Qt); | |
819 | decode_coding_c_string (&process_coding, | |
820 | (unsigned char *) buf, nread, curbuf); | |
821 | unbind_to (count1, Qnil); | |
822 | if (display_on_the_fly | |
823 | && CODING_REQUIRE_DETECTION (&saved_coding) | |
824 | && ! CODING_REQUIRE_DETECTION (&process_coding)) | |
825 | { | |
826 | /* We have detected some coding system. But, | |
827 | there's a possibility that the detection was | |
828 | done by insufficient data. So, we give up | |
829 | displaying on the fly. */ | |
830 | if (process_coding.produced > 0) | |
831 | del_range_2 (process_coding.dst_pos, | |
832 | process_coding.dst_pos_byte, | |
833 | process_coding.dst_pos | |
834 | + process_coding.produced_char, | |
835 | process_coding.dst_pos_byte | |
836 | + process_coding.produced, 0); | |
837 | display_on_the_fly = 0; | |
838 | process_coding = saved_coding; | |
839 | carryover = nread; | |
840 | /* This is to make the above condition always | |
841 | fails in the future. */ | |
842 | saved_coding.common_flags | |
843 | &= ~CODING_REQUIRE_DETECTION_MASK; | |
844 | continue; | |
845 | } | |
846 | ||
847 | TEMP_SET_PT_BOTH (PT + process_coding.produced_char, | |
848 | PT_BYTE + process_coding.produced); | |
849 | carryover = process_coding.carryover_bytes; | |
850 | if (carryover > 0) | |
851 | memcpy (buf, process_coding.carryover, | |
852 | process_coding.carryover_bytes); | |
853 | } | |
854 | } | |
c5bfa12b | 855 | |
19ed11ba AS |
856 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
857 | break; | |
6e3bfbb2 | 858 | |
19ed11ba AS |
859 | /* Make the buffer bigger as we continue to read more data, |
860 | but not past CALLPROC_BUFFER_SIZE_MAX. */ | |
861 | if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) | |
862 | if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) | |
863 | bufsize = CALLPROC_BUFFER_SIZE_MAX; | |
6e3bfbb2 | 864 | |
19ed11ba AS |
865 | if (display_p) |
866 | { | |
867 | if (first) | |
868 | prepare_menu_bars (); | |
869 | first = 0; | |
870 | redisplay_preserve_echo_area (1); | |
871 | /* This variable might have been set to 0 for code | |
872 | detection. In that case, we set it back to 1 because | |
873 | we should have already detected a coding system. */ | |
874 | display_on_the_fly = 1; | |
875 | } | |
876 | immediate_quit = 1; | |
877 | QUIT; | |
878 | } | |
879 | give_up: ; | |
880 | ||
881 | Vlast_coding_system_used = CODING_ID_NAME (process_coding.id); | |
882 | /* If the caller required, let the buffer inherit the | |
883 | coding-system used to decode the process output. */ | |
884 | if (inherit_process_coding_system) | |
885 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
886 | make_number (total_read)); | |
887 | } | |
3b440bb5 | 888 | |
77defa9a | 889 | #ifndef MSDOS |
80856e74 | 890 | /* Wait for it to terminate, unless it already has. */ |
1ef14cb4 LMI |
891 | if (output_to_buffer) |
892 | wait_for_termination (pid); | |
893 | else | |
894 | interruptible_wait_for_termination (pid); | |
77defa9a | 895 | #endif |
80856e74 JB |
896 | |
897 | immediate_quit = 0; | |
898 | ||
37d54121 RS |
899 | /* Don't kill any children that the subprocess may have left behind |
900 | when exiting. */ | |
901 | call_process_exited = 1; | |
902 | ||
3c59b4c9 | 903 | SAFE_FREE (); |
80856e74 JB |
904 | unbind_to (count, Qnil); |
905 | ||
6b61353c KH |
906 | if (synch_process_termsig) |
907 | { | |
42ca4633 | 908 | const char *signame; |
6b61353c KH |
909 | |
910 | synchronize_system_messages_locale (); | |
911 | signame = strsignal (synch_process_termsig); | |
912 | ||
913 | if (signame == 0) | |
19ed11ba | 914 | signame = "unknown"; |
6b61353c KH |
915 | |
916 | synch_process_death = signame; | |
917 | } | |
918 | ||
80856e74 | 919 | if (synch_process_death) |
68c45bf0 PE |
920 | return code_convert_string_norecord (build_string (synch_process_death), |
921 | Vlocale_coding_system, 0); | |
80856e74 JB |
922 | return make_number (synch_process_retcode); |
923 | } | |
80856e74 | 924 | \f |
9fefd2ba | 925 | static Lisp_Object |
971de7fb | 926 | delete_temp_file (Lisp_Object name) |
80856e74 | 927 | { |
1a271e14 | 928 | /* Suppress jka-compr handling, etc. */ |
d311d28c | 929 | ptrdiff_t count = SPECPDL_INDEX (); |
1a271e14 | 930 | specbind (intern ("file-name-handler-alist"), Qnil); |
f1a5d776 | 931 | internal_delete_file (name); |
1a271e14 | 932 | unbind_to (count, Qnil); |
320695d8 | 933 | return Qnil; |
80856e74 JB |
934 | } |
935 | ||
936 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
fdb82f93 PJ |
937 | 3, MANY, 0, |
938 | doc: /* Send text from START to END to a synchronous process running PROGRAM. | |
939 | The remaining arguments are optional. | |
940 | Delete the text if fourth arg DELETE is non-nil. | |
941 | ||
1ef14cb4 LMI |
942 | Insert output in BUFFER before point; t means current buffer; nil for |
943 | BUFFER means discard it; 0 means discard and don't wait; and `(:file | |
944 | FILE)', where FILE is a file name string, means that it should be | |
1b9f60cc | 945 | written to that file (if the file already exists it is overwritten). |
fdb82f93 PJ |
946 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
947 | REAL-BUFFER says what to do with standard output, as above, | |
948 | while STDERR-FILE says what to do with standard error in the child. | |
949 | STDERR-FILE may be nil (discard standard error output), | |
950 | t (mix it with ordinary output), or a file name string. | |
951 | ||
952 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
953 | Remaining args are passed to PROGRAM at startup as command args. | |
954 | ||
ba9a5174 | 955 | If BUFFER is 0, `call-process-region' returns immediately with value nil. |
fdb82f93 PJ |
956 | Otherwise it waits for PROGRAM to terminate |
957 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
958 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
959 | ||
960 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) | |
f66c7cf8 | 961 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 962 | { |
39323a7e KH |
963 | struct gcpro gcpro1; |
964 | Lisp_Object filename_string; | |
965 | register Lisp_Object start, end; | |
d311d28c | 966 | ptrdiff_t count = SPECPDL_INDEX (); |
08ee4e87 | 967 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
09494912 | 968 | Lisp_Object coding_systems; |
32d08644 | 969 | Lisp_Object val, *args2; |
f66c7cf8 | 970 | ptrdiff_t i; |
98c6f1e3 | 971 | Lisp_Object tmpdir; |
7e6c2178 | 972 | |
f92d51d8 CY |
973 | if (STRINGP (Vtemporary_file_directory)) |
974 | tmpdir = Vtemporary_file_directory; | |
7e6c2178 RS |
975 | else |
976 | { | |
f92d51d8 CY |
977 | #ifndef DOS_NT |
978 | if (getenv ("TMPDIR")) | |
979 | tmpdir = build_string (getenv ("TMPDIR")); | |
980 | else | |
981 | tmpdir = build_string ("/tmp/"); | |
982 | #else /* DOS_NT */ | |
983 | char *outf; | |
984 | if ((outf = egetenv ("TMPDIR")) | |
985 | || (outf = egetenv ("TMP")) | |
986 | || (outf = egetenv ("TEMP"))) | |
987 | tmpdir = build_string (outf); | |
988 | else | |
989 | tmpdir = Ffile_name_as_directory (build_string ("c:/temp")); | |
0774fcf8 | 990 | #endif |
f92d51d8 | 991 | } |
7e6c2178 | 992 | |
3c59b4c9 PE |
993 | { |
994 | USE_SAFE_ALLOCA; | |
98c6f1e3 PE |
995 | Lisp_Object pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir); |
996 | char *tempfile = SAFE_ALLOCA (SBYTES (pattern) + 1); | |
3c59b4c9 PE |
997 | memcpy (tempfile, SDATA (pattern), SBYTES (pattern) + 1); |
998 | coding_systems = Qt; | |
09494912 | 999 | |
1ddc85a4 | 1000 | #ifdef HAVE_MKSTEMP |
3c59b4c9 PE |
1001 | { |
1002 | int fd; | |
1003 | ||
1004 | BLOCK_INPUT; | |
1005 | fd = mkstemp (tempfile); | |
1006 | UNBLOCK_INPUT; | |
1007 | if (fd == -1) | |
1008 | report_file_error ("Failed to open temporary file", | |
baac5bc7 | 1009 | Fcons (build_string (tempfile), Qnil)); |
3c59b4c9 PE |
1010 | else |
1011 | close (fd); | |
1012 | } | |
1ddc85a4 | 1013 | #else |
3c59b4c9 | 1014 | mktemp (tempfile); |
1ddc85a4 | 1015 | #endif |
80856e74 | 1016 | |
3c59b4c9 PE |
1017 | filename_string = build_string (tempfile); |
1018 | GCPRO1 (filename_string); | |
1019 | SAFE_FREE (); | |
1020 | } | |
1021 | ||
80856e74 JB |
1022 | start = args[0]; |
1023 | end = args[1]; | |
32d08644 | 1024 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
1025 | if (!NILP (Vcoding_system_for_write)) |
1026 | val = Vcoding_system_for_write; | |
4b4deea2 | 1027 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
fcaf8878 | 1028 | val = Qraw_text; |
32d08644 | 1029 | else |
beacaab3 | 1030 | { |
3c59b4c9 | 1031 | USE_SAFE_ALLOCA; |
0065d054 | 1032 | SAFE_NALLOCA (args2, 1, nargs + 1); |
91489411 RS |
1033 | args2[0] = Qcall_process_region; |
1034 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1035 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); | |
fcaf8878 | 1036 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
3c59b4c9 | 1037 | SAFE_FREE (); |
beacaab3 | 1038 | } |
fcaf8878 | 1039 | val = complement_process_encoding_system (val); |
32d08644 | 1040 | |
168afdaa | 1041 | { |
d311d28c | 1042 | ptrdiff_t count1 = SPECPDL_INDEX (); |
168afdaa RS |
1043 | |
1044 | specbind (intern ("coding-system-for-write"), val); | |
bb951f0e KR |
1045 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
1046 | happen to get a ".Z" suffix. */ | |
1047 | specbind (intern ("file-name-handler-alist"), Qnil); | |
168afdaa RS |
1048 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil); |
1049 | ||
1050 | unbind_to (count1, Qnil); | |
1051 | } | |
91489411 | 1052 | |
177c0ea7 | 1053 | /* Note that Fcall_process takes care of binding |
91489411 | 1054 | coding-system-for-read. */ |
093650fe | 1055 | |
80856e74 JB |
1056 | record_unwind_protect (delete_temp_file, filename_string); |
1057 | ||
edf496dd | 1058 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
1059 | Fdelete_region (start, end); |
1060 | ||
edf496dd KH |
1061 | if (nargs > 3) |
1062 | { | |
1063 | args += 2; | |
1064 | nargs -= 2; | |
1065 | } | |
1066 | else | |
1067 | { | |
1068 | args[0] = args[2]; | |
1069 | nargs = 2; | |
1070 | } | |
1071 | args[1] = filename_string; | |
80856e74 | 1072 | |
edf496dd | 1073 | RETURN_UNGCPRO (unbind_to (count, Fcall_process (nargs, args))); |
80856e74 JB |
1074 | } |
1075 | \f | |
361358ea | 1076 | #ifndef WINDOWSNT |
971de7fb | 1077 | static int relocate_fd (int fd, int minfd); |
361358ea | 1078 | #endif |
dfcf069d | 1079 | |
5990851d KL |
1080 | static char ** |
1081 | add_env (char **env, char **new_env, char *string) | |
1082 | { | |
1083 | char **ep; | |
2f221583 | 1084 | bool ok = 1; |
5990851d KL |
1085 | if (string == NULL) |
1086 | return new_env; | |
1087 | ||
1088 | /* See if this string duplicates any string already in the env. | |
1089 | If so, don't put it in. | |
1090 | When an env var has multiple definitions, | |
1091 | we keep the definition that comes first in process-environment. */ | |
1092 | for (ep = env; ok && ep != new_env; ep++) | |
1093 | { | |
1094 | char *p = *ep, *q = string; | |
1095 | while (ok) | |
19ed11ba AS |
1096 | { |
1097 | if (*q != *p) | |
1098 | break; | |
1099 | if (*q == 0) | |
1100 | /* The string is a lone variable name; keep it for now, we | |
1101 | will remove it later. It is a placeholder for a | |
1102 | variable that is not to be included in the environment. */ | |
1103 | break; | |
1104 | if (*q == '=') | |
1105 | ok = 0; | |
1106 | p++, q++; | |
1107 | } | |
5990851d KL |
1108 | } |
1109 | if (ok) | |
1110 | *new_env++ = string; | |
1111 | return new_env; | |
1112 | } | |
1113 | ||
80856e74 JB |
1114 | /* This is the last thing run in a newly forked inferior |
1115 | either synchronous or asynchronous. | |
1116 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
1117 | Initialize inferior's priority, pgrp, connected dir and environment. | |
1118 | then exec another program based on new_argv. | |
1119 | ||
1120 | This function may change environ for the superior process. | |
1121 | Therefore, the superior process must save and restore the value | |
1122 | of environ around the vfork and the call to this function. | |
1123 | ||
2f221583 | 1124 | If SET_PGRP, put the subprocess into a separate process group. |
e576cab4 JB |
1125 | |
1126 | CURRENT_DIR is an elisp string giving the path of the current | |
1127 | directory the subprocess should have. Since we can't really signal | |
1128 | a decent error from within the child, this should be verified as an | |
1129 | executable directory by the parent. */ | |
80856e74 | 1130 | |
dfcf069d | 1131 | int |
2f221583 PE |
1132 | child_setup (int in, int out, int err, char **new_argv, bool set_pgrp, |
1133 | Lisp_Object current_dir) | |
80856e74 | 1134 | { |
e576cab4 | 1135 | char **env; |
7fcf7f05 | 1136 | char *pwd_var; |
bad95d8f RS |
1137 | #ifdef WINDOWSNT |
1138 | int cpid; | |
4252a4bd | 1139 | HANDLE handles[3]; |
bad95d8f | 1140 | #endif /* WINDOWSNT */ |
e576cab4 | 1141 | |
d311d28c | 1142 | pid_t pid = getpid (); |
80856e74 | 1143 | |
80856e74 JB |
1144 | /* Close Emacs's descriptors that this process should not have. */ |
1145 | close_process_descs (); | |
ded80a25 | 1146 | |
c17c4250 EZ |
1147 | /* DOS_NT isn't in a vfork, so if we are in the middle of load-file, |
1148 | we will lose if we call close_load_descs here. */ | |
1149 | #ifndef DOS_NT | |
4458cebe | 1150 | close_load_descs (); |
c17c4250 | 1151 | #endif |
80856e74 JB |
1152 | |
1153 | /* Note that use of alloca is always safe here. It's obvious for systems | |
1154 | that do not have true vfork or that have true (stack) alloca. | |
caa01fe0 GM |
1155 | If using vfork and C_ALLOCA (when Emacs used to include |
1156 | src/alloca.c) it is safe because that changes the superior's | |
1157 | static variables as if the superior had done alloca and will be | |
1158 | cleaned up in the usual way. */ | |
e576cab4 | 1159 | { |
7fcf7f05 | 1160 | register char *temp; |
0065d054 | 1161 | size_t i; /* size_t, because ptrdiff_t might overflow here! */ |
77d78be1 | 1162 | |
d5db4077 | 1163 | i = SBYTES (current_dir); |
16425c4a EZ |
1164 | #ifdef MSDOS |
1165 | /* MSDOS must have all environment variables malloc'ed, because | |
1166 | low-level libc functions that launch subsidiary processes rely | |
1167 | on that. */ | |
23f86fce | 1168 | pwd_var = xmalloc (i + 6); |
16425c4a | 1169 | #else |
38182d90 | 1170 | pwd_var = alloca (i + 6); |
16425c4a | 1171 | #endif |
7fcf7f05 | 1172 | temp = pwd_var + 4; |
72af86bd AS |
1173 | memcpy (pwd_var, "PWD=", 4); |
1174 | memcpy (temp, SDATA (current_dir), i); | |
bad95d8f | 1175 | if (!IS_DIRECTORY_SEP (temp[i - 1])) temp[i++] = DIRECTORY_SEP; |
e576cab4 JB |
1176 | temp[i] = 0; |
1177 | ||
c17c4250 | 1178 | #ifndef DOS_NT |
e576cab4 JB |
1179 | /* We can't signal an Elisp error here; we're in a vfork. Since |
1180 | the callers check the current directory before forking, this | |
1181 | should only return an error if the directory's permissions | |
1182 | are changed between the check and this chdir, but we should | |
1183 | at least check. */ | |
1184 | if (chdir (temp) < 0) | |
20b25e46 | 1185 | _exit (errno); |
f8d23104 | 1186 | #else /* DOS_NT */ |
c17c4250 EZ |
1187 | /* Get past the drive letter, so that d:/ is left alone. */ |
1188 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
1189 | { | |
1190 | temp += 2; | |
1191 | i -= 2; | |
1192 | } | |
f8d23104 | 1193 | #endif /* DOS_NT */ |
c17c4250 | 1194 | |
7fcf7f05 | 1195 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 1196 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 1197 | temp[--i] = 0; |
e576cab4 | 1198 | } |
80856e74 | 1199 | |
5990851d | 1200 | /* Set `env' to a vector of the strings in the environment. */ |
80856e74 JB |
1201 | { |
1202 | register Lisp_Object tem; | |
1203 | register char **new_env; | |
5990851d | 1204 | char **p, **q; |
80856e74 | 1205 | register int new_length; |
d2bb6598 | 1206 | Lisp_Object display = Qnil; |
361358ea | 1207 | |
80856e74 | 1208 | new_length = 0; |
f105f403 | 1209 | |
80856e74 | 1210 | for (tem = Vprocess_environment; |
19ed11ba AS |
1211 | CONSP (tem) && STRINGP (XCAR (tem)); |
1212 | tem = XCDR (tem)) | |
d2bb6598 | 1213 | { |
42a5b22f | 1214 | if (strncmp (SSDATA (XCAR (tem)), "DISPLAY", 7) == 0 |
d2bb6598 SM |
1215 | && (SDATA (XCAR (tem)) [7] == '\0' |
1216 | || SDATA (XCAR (tem)) [7] == '=')) | |
1217 | /* DISPLAY is specified in process-environment. */ | |
1218 | display = Qt; | |
1219 | new_length++; | |
1220 | } | |
de87fb59 | 1221 | |
d2bb6598 SM |
1222 | /* If not provided yet, use the frame's DISPLAY. */ |
1223 | if (NILP (display)) | |
1224 | { | |
1225 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); | |
1226 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) | |
1227 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1228 | tmp = Fgetenv_internal (build_string ("DISPLAY"), | |
1229 | Vinitial_environment); | |
1230 | if (STRINGP (tmp)) | |
1231 | { | |
1232 | display = tmp; | |
1233 | new_length++; | |
1234 | } | |
1235 | } | |
80856e74 | 1236 | |
7fcf7f05 | 1237 | /* new_length + 2 to include PWD and terminating 0. */ |
38182d90 | 1238 | env = new_env = alloca ((new_length + 2) * sizeof *env); |
7fcf7f05 RS |
1239 | /* If we have a PWD envvar, pass one down, |
1240 | but with corrected value. */ | |
a13f8f50 | 1241 | if (egetenv ("PWD")) |
7fcf7f05 | 1242 | *new_env++ = pwd_var; |
361358ea | 1243 | |
6b8e474c | 1244 | if (STRINGP (display)) |
de87fb59 | 1245 | { |
38182d90 | 1246 | char *vdata = alloca (sizeof "DISPLAY=" + SBYTES (display)); |
de87fb59 | 1247 | strcpy (vdata, "DISPLAY="); |
42a5b22f | 1248 | strcat (vdata, SSDATA (display)); |
de87fb59 DN |
1249 | new_env = add_env (env, new_env, vdata); |
1250 | } | |
80856e74 | 1251 | |
5990851d | 1252 | /* Overrides. */ |
80856e74 | 1253 | for (tem = Vprocess_environment; |
70949dac KR |
1254 | CONSP (tem) && STRINGP (XCAR (tem)); |
1255 | tem = XCDR (tem)) | |
42a5b22f | 1256 | new_env = add_env (env, new_env, SSDATA (XCAR (tem))); |
d2bb6598 | 1257 | |
5990851d KL |
1258 | *new_env = 0; |
1259 | ||
1260 | /* Remove variable names without values. */ | |
1261 | p = q = env; | |
1262 | while (*p != 0) | |
cd9565ba | 1263 | { |
19ed11ba AS |
1264 | while (*q != 0 && strchr (*q, '=') == NULL) |
1265 | q++; | |
1266 | *p = *q++; | |
1267 | if (*p != 0) | |
1268 | p++; | |
cd9565ba | 1269 | } |
80856e74 | 1270 | } |
de87fb59 | 1271 | |
361358ea | 1272 | |
bad95d8f RS |
1273 | #ifdef WINDOWSNT |
1274 | prepare_standard_handles (in, out, err, handles); | |
d5db4077 | 1275 | set_process_dir (SDATA (current_dir)); |
67802943 DN |
1276 | /* Spawn the child. (See ntproc.c:Spawnve). */ |
1277 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); | |
1278 | reset_standard_handles (in, out, err, handles); | |
1279 | if (cpid == -1) | |
1280 | /* An error occurred while trying to spawn the process. */ | |
1281 | report_file_error ("Spawning child process", Qnil); | |
1282 | return cpid; | |
1283 | ||
bad95d8f | 1284 | #else /* not WINDOWSNT */ |
426b37ae JB |
1285 | /* Make sure that in, out, and err are not actually already in |
1286 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1287 | started with its standard in, out, or error closed, as might |
426b37ae | 1288 | happen under X. */ |
f29f9e4a RS |
1289 | { |
1290 | int oin = in, oout = out; | |
1291 | ||
1292 | /* We have to avoid relocating the same descriptor twice! */ | |
1293 | ||
1294 | in = relocate_fd (in, 3); | |
1295 | ||
1296 | if (out == oin) | |
1297 | out = in; | |
1298 | else | |
3e9367e7 | 1299 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1300 | |
1301 | if (err == oin) | |
1302 | err = in; | |
1303 | else if (err == oout) | |
1304 | err = out; | |
1305 | else | |
3e9367e7 | 1306 | err = relocate_fd (err, 3); |
f29f9e4a | 1307 | } |
426b37ae | 1308 | |
c17c4250 | 1309 | #ifndef MSDOS |
68c45bf0 PE |
1310 | emacs_close (0); |
1311 | emacs_close (1); | |
1312 | emacs_close (2); | |
80856e74 JB |
1313 | |
1314 | dup2 (in, 0); | |
1315 | dup2 (out, 1); | |
1316 | dup2 (err, 2); | |
68c45bf0 | 1317 | emacs_close (in); |
ce8f5a9a AS |
1318 | if (out != in) |
1319 | emacs_close (out); | |
1320 | if (err != in && err != out) | |
1321 | emacs_close (err); | |
80856e74 | 1322 | |
5e617bc2 | 1323 | #if defined (USG) |
fdba8590 | 1324 | #ifndef SETPGRP_RELEASES_CTTY |
e576cab4 | 1325 | setpgrp (); /* No arguments but equivalent in this case */ |
fdba8590 | 1326 | #endif |
67802943 | 1327 | #else /* not USG */ |
e576cab4 | 1328 | setpgrp (pid, pid); |
67802943 | 1329 | #endif /* not USG */ |
80856e74 | 1330 | |
a7ebc409 | 1331 | /* setpgrp_of_tty is incorrect here; it uses input_fd. */ |
12e610e8 | 1332 | tcsetpgrp (0, pid); |
a7ebc409 | 1333 | |
80856e74 JB |
1334 | /* execvp does not accept an environment arg so the only way |
1335 | to pass this environment is to set environ. Our caller | |
1336 | is responsible for restoring the ambient value of environ. */ | |
1337 | environ = env; | |
1338 | execvp (new_argv[0], new_argv); | |
1339 | ||
68c45bf0 PE |
1340 | emacs_write (1, "Can't exec program: ", 20); |
1341 | emacs_write (1, new_argv[0], strlen (new_argv[0])); | |
1342 | emacs_write (1, "\n", 1); | |
80856e74 | 1343 | _exit (1); |
67802943 DN |
1344 | |
1345 | #else /* MSDOS */ | |
1346 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
1347 | xfree (pwd_var); | |
1348 | if (pid == -1) | |
1349 | /* An error occurred while trying to run the subprocess. */ | |
1350 | report_file_error ("Spawning child process", Qnil); | |
1351 | return pid; | |
1352 | #endif /* MSDOS */ | |
ae76d9e1 | 1353 | #endif /* not WINDOWSNT */ |
80856e74 JB |
1354 | } |
1355 | ||
361358ea | 1356 | #ifndef WINDOWSNT |
a3833dfe | 1357 | /* Move the file descriptor FD so that its number is not less than MINFD. |
426b37ae | 1358 | If the file descriptor is moved at all, the original is freed. */ |
dfcf069d | 1359 | static int |
971de7fb | 1360 | relocate_fd (int fd, int minfd) |
426b37ae | 1361 | { |
a3833dfe | 1362 | if (fd >= minfd) |
426b37ae JB |
1363 | return fd; |
1364 | else | |
1365 | { | |
cf237e27 AS |
1366 | int new; |
1367 | #ifdef F_DUPFD | |
1368 | new = fcntl (fd, F_DUPFD, minfd); | |
1369 | #else | |
1370 | new = dup (fd); | |
1371 | if (new != -1) | |
1372 | /* Note that we hold the original FD open while we recurse, | |
1373 | to guarantee we'll get a new FD if we need it. */ | |
1374 | new = relocate_fd (new, minfd); | |
1375 | #endif | |
426b37ae JB |
1376 | if (new == -1) |
1377 | { | |
cb1d0ef7 | 1378 | const char *message_1 = "Error while setting up child: "; |
a8fe7202 | 1379 | const char *errmessage = strerror (errno); |
cb1d0ef7 PE |
1380 | const char *message_2 = "\n"; |
1381 | emacs_write (2, message_1, strlen (message_1)); | |
68c45bf0 | 1382 | emacs_write (2, errmessage, strlen (errmessage)); |
cb1d0ef7 | 1383 | emacs_write (2, message_2, strlen (message_2)); |
426b37ae JB |
1384 | _exit (1); |
1385 | } | |
68c45bf0 | 1386 | emacs_close (fd); |
426b37ae JB |
1387 | return new; |
1388 | } | |
1389 | } | |
361358ea | 1390 | #endif /* not WINDOWSNT */ |
426b37ae | 1391 | |
2f221583 | 1392 | static bool |
989f33ba PE |
1393 | getenv_internal_1 (const char *var, ptrdiff_t varlen, char **value, |
1394 | ptrdiff_t *valuelen, Lisp_Object env) | |
012c6fcb | 1395 | { |
db699fc6 | 1396 | for (; CONSP (env); env = XCDR (env)) |
012c6fcb | 1397 | { |
db699fc6 | 1398 | Lisp_Object entry = XCAR (env); |
d50d3dc8 | 1399 | if (STRINGP (entry) |
db699fc6 | 1400 | && SBYTES (entry) >= varlen |
bad95d8f RS |
1401 | #ifdef WINDOWSNT |
1402 | /* NT environment variables are case insensitive. */ | |
d5db4077 | 1403 | && ! strnicmp (SDATA (entry), var, varlen) |
bad95d8f | 1404 | #else /* not WINDOWSNT */ |
72af86bd | 1405 | && ! memcmp (SDATA (entry), var, varlen) |
bad95d8f | 1406 | #endif /* not WINDOWSNT */ |
a9971c6d | 1407 | ) |
012c6fcb | 1408 | { |
db699fc6 SM |
1409 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') |
1410 | { | |
51b59d79 | 1411 | *value = SSDATA (entry) + (varlen + 1); |
db699fc6 SM |
1412 | *valuelen = SBYTES (entry) - (varlen + 1); |
1413 | return 1; | |
1414 | } | |
1415 | else if (SBYTES (entry) == varlen) | |
1416 | { | |
1417 | /* Lone variable names in Vprocess_environment mean that | |
1418 | variable should be removed from the environment. */ | |
1419 | *value = NULL; | |
1420 | return 1; | |
1421 | } | |
1422 | } | |
1423 | } | |
1424 | return 0; | |
1425 | } | |
1426 | ||
2f221583 | 1427 | static bool |
989f33ba PE |
1428 | getenv_internal (const char *var, ptrdiff_t varlen, char **value, |
1429 | ptrdiff_t *valuelen, Lisp_Object frame) | |
012c6fcb | 1430 | { |
d2bb6598 SM |
1431 | /* Try to find VAR in Vprocess_environment first. */ |
1432 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1433 | Vprocess_environment)) | |
1434 | return *value ? 1 : 0; | |
f105f403 | 1435 | |
d2bb6598 | 1436 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
de87fb59 | 1437 | if (strcmp (var, "DISPLAY") == 0) |
d2bb6598 SM |
1438 | { |
1439 | Lisp_Object display | |
1440 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); | |
1441 | if (STRINGP (display)) | |
1442 | { | |
51b59d79 | 1443 | *value = SSDATA (display); |
de87fb59 | 1444 | *valuelen = SBYTES (display); |
012c6fcb JA |
1445 | return 1; |
1446 | } | |
d2bb6598 SM |
1447 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
1448 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1449 | Vinitial_environment)) | |
1450 | return *value ? 1 : 0; | |
012c6fcb JA |
1451 | } |
1452 | ||
1453 | return 0; | |
1454 | } | |
1455 | ||
f105f403 | 1456 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
5990851d KL |
1457 | doc: /* Get the value of environment variable VARIABLE. |
1458 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
1459 | the environment. Otherwise, value is a string. | |
f105f403 | 1460 | |
acf20901 | 1461 | This function searches `process-environment' for VARIABLE. |
5990851d | 1462 | |
db699fc6 | 1463 | If optional parameter ENV is a list, then search this list instead of |
acf20901 JB |
1464 | `process-environment', and return t when encountering a negative entry |
1465 | \(an entry for a variable with no value). */) | |
5842a27b | 1466 | (Lisp_Object variable, Lisp_Object env) |
012c6fcb JA |
1467 | { |
1468 | char *value; | |
989f33ba | 1469 | ptrdiff_t valuelen; |
012c6fcb | 1470 | |
5990851d | 1471 | CHECK_STRING (variable); |
db699fc6 SM |
1472 | if (CONSP (env)) |
1473 | { | |
42a5b22f | 1474 | if (getenv_internal_1 (SSDATA (variable), SBYTES (variable), |
db699fc6 SM |
1475 | &value, &valuelen, env)) |
1476 | return value ? make_string (value, valuelen) : Qt; | |
1477 | else | |
1478 | return Qnil; | |
1479 | } | |
42a5b22f | 1480 | else if (getenv_internal (SSDATA (variable), SBYTES (variable), |
d2bb6598 | 1481 | &value, &valuelen, env)) |
012c6fcb JA |
1482 | return make_string (value, valuelen); |
1483 | else | |
1484 | return Qnil; | |
1485 | } | |
1486 | ||
5990851d KL |
1487 | /* A version of getenv that consults the Lisp environment lists, |
1488 | easily callable from C. */ | |
012c6fcb | 1489 | char * |
a8fe7202 | 1490 | egetenv (const char *var) |
012c6fcb JA |
1491 | { |
1492 | char *value; | |
25c7e41f | 1493 | ptrdiff_t valuelen; |
012c6fcb | 1494 | |
f105f403 | 1495 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
012c6fcb JA |
1496 | return value; |
1497 | else | |
1498 | return 0; | |
1499 | } | |
1500 | ||
80856e74 | 1501 | \f |
8de15d69 | 1502 | /* This is run before init_cmdargs. */ |
177c0ea7 | 1503 | |
dfcf069d | 1504 | void |
971de7fb | 1505 | init_callproc_1 (void) |
8de15d69 | 1506 | { |
d01ba2f1 GM |
1507 | #ifdef HAVE_NS |
1508 | const char *etc_dir = ns_etc_directory (); | |
cbb31951 | 1509 | const char *path_exec = ns_exec_path (); |
d01ba2f1 | 1510 | #endif |
35a2f4b8 | 1511 | |
76151e2c | 1512 | Vdata_directory = decode_env_path ("EMACSDATA", |
d01ba2f1 | 1513 | #ifdef HAVE_NS |
76151e2c | 1514 | etc_dir ? etc_dir : |
d01ba2f1 | 1515 | #endif |
76151e2c EZ |
1516 | PATH_DATA); |
1517 | Vdata_directory = Ffile_name_as_directory (Fcar (Vdata_directory)); | |
1518 | ||
1519 | Vdoc_directory = decode_env_path ("EMACSDOC", | |
d01ba2f1 | 1520 | #ifdef HAVE_NS |
76151e2c | 1521 | etc_dir ? etc_dir : |
d01ba2f1 | 1522 | #endif |
76151e2c EZ |
1523 | PATH_DOC); |
1524 | Vdoc_directory = Ffile_name_as_directory (Fcar (Vdoc_directory)); | |
9453ea7b | 1525 | |
e576cab4 | 1526 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1527 | PATH_EXEC path from epaths.h. */ |
cbb31951 GM |
1528 | Vexec_path = decode_env_path ("EMACSPATH", |
1529 | #ifdef HAVE_NS | |
1530 | path_exec ? path_exec : | |
1531 | #endif | |
1532 | PATH_EXEC); | |
80856e74 | 1533 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
cbb31951 | 1534 | /* FIXME? For ns, path_exec should go at the front? */ |
80856e74 | 1535 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); |
8de15d69 RS |
1536 | } |
1537 | ||
e17f7533 | 1538 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1539 | |
dfcf069d | 1540 | void |
971de7fb | 1541 | init_callproc (void) |
8de15d69 RS |
1542 | { |
1543 | char *data_dir = egetenv ("EMACSDATA"); | |
177c0ea7 | 1544 | |
8de15d69 RS |
1545 | register char * sh; |
1546 | Lisp_Object tempdir; | |
d01ba2f1 GM |
1547 | #ifdef HAVE_NS |
1548 | if (data_dir == 0) | |
1549 | { | |
1550 | const char *etc_dir = ns_etc_directory (); | |
1551 | if (etc_dir) | |
1552 | { | |
1553 | data_dir = alloca (strlen (etc_dir) + 1); | |
1554 | strcpy (data_dir, etc_dir); | |
1555 | } | |
1556 | } | |
1557 | #endif | |
8de15d69 | 1558 | |
9cc4fad5 | 1559 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1560 | { |
05630743 RS |
1561 | /* Add to the path the lib-src subdir of the installation dir. */ |
1562 | Lisp_Object tem; | |
1563 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1564 | Vinstallation_directory); | |
76151e2c | 1565 | #ifndef MSDOS |
1a6640ec | 1566 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc | 1567 | if (NILP (Fmember (tem, Vexec_path))) |
70ec1377 | 1568 | { |
cbb31951 GM |
1569 | #ifdef HAVE_NS |
1570 | const char *path_exec = ns_exec_path (); | |
1571 | #endif | |
1572 | Vexec_path = decode_env_path ("EMACSPATH", | |
1573 | #ifdef HAVE_NS | |
1574 | path_exec ? path_exec : | |
1575 | #endif | |
1576 | PATH_EXEC); | |
70ec1377 RS |
1577 | Vexec_path = Fcons (tem, Vexec_path); |
1578 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
1579 | } | |
177c0ea7 | 1580 | |
0fa248bc | 1581 | Vexec_directory = Ffile_name_as_directory (tem); |
76151e2c | 1582 | #endif /* not MSDOS */ |
8de15d69 | 1583 | |
e17f7533 RS |
1584 | /* Maybe use ../etc as well as ../lib-src. */ |
1585 | if (data_dir == 0) | |
1586 | { | |
1587 | tem = Fexpand_file_name (build_string ("etc"), | |
1588 | Vinstallation_directory); | |
1589 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1590 | } |
1591 | } | |
7e933683 RS |
1592 | |
1593 | /* Look for the files that should be in etc. We don't use | |
1594 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1595 | near the executable, and they are never in the build |
7e933683 RS |
1596 | directory when that's different from the source directory. |
1597 | ||
1598 | Instead, if these files are not in the nominal place, we try the | |
1599 | source directory. */ | |
1600 | if (data_dir == 0) | |
1601 | { | |
70ec1377 | 1602 | Lisp_Object tem, tem1, srcdir; |
7e933683 | 1603 | |
70ec1377 RS |
1604 | srcdir = Fexpand_file_name (build_string ("../src/"), |
1605 | build_string (PATH_DUMPLOADSEARCH)); | |
7e933683 RS |
1606 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); |
1607 | tem1 = Ffile_exists_p (tem); | |
70ec1377 | 1608 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
7e933683 | 1609 | { |
70ec1377 | 1610 | Lisp_Object newdir; |
7e933683 RS |
1611 | newdir = Fexpand_file_name (build_string ("../etc/"), |
1612 | build_string (PATH_DUMPLOADSEARCH)); | |
1613 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1614 | tem1 = Ffile_exists_p (tem); | |
1615 | if (!NILP (tem1)) | |
1616 | Vdata_directory = newdir; | |
1617 | } | |
1618 | } | |
80856e74 | 1619 | |
d883eb62 RS |
1620 | #ifndef CANNOT_DUMP |
1621 | if (initialized) | |
1622 | #endif | |
1623 | { | |
1624 | tempdir = Fdirectory_file_name (Vexec_directory); | |
42a5b22f | 1625 | if (access (SSDATA (tempdir), 0) < 0) |
d883eb62 RS |
1626 | dir_warning ("Warning: arch-dependent data dir (%s) does not exist.\n", |
1627 | Vexec_directory); | |
1628 | } | |
80856e74 | 1629 | |
e576cab4 | 1630 | tempdir = Fdirectory_file_name (Vdata_directory); |
42a5b22f | 1631 | if (access (SSDATA (tempdir), 0) < 0) |
76d5c6cf RS |
1632 | dir_warning ("Warning: arch-independent data dir (%s) does not exist.\n", |
1633 | Vdata_directory); | |
e576cab4 | 1634 | |
e576cab4 | 1635 | sh = (char *) getenv ("SHELL"); |
80856e74 | 1636 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
8abd035b | 1637 | |
40b49d4b JB |
1638 | #ifdef DOS_NT |
1639 | Vshared_game_score_directory = Qnil; | |
1640 | #else | |
63789758 RS |
1641 | Vshared_game_score_directory = build_string (PATH_GAME); |
1642 | if (NILP (Ffile_directory_p (Vshared_game_score_directory))) | |
1643 | Vshared_game_score_directory = Qnil; | |
40b49d4b | 1644 | #endif |
9fefd2ba JB |
1645 | } |
1646 | ||
dfcf069d | 1647 | void |
971de7fb | 1648 | set_initial_environment (void) |
9fefd2ba | 1649 | { |
738db178 DN |
1650 | char **envp; |
1651 | for (envp = environ; *envp; envp++) | |
1652 | Vprocess_environment = Fcons (build_string (*envp), | |
1653 | Vprocess_environment); | |
1654 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent | |
1655 | to use `delete' and friends on process-environment. */ | |
1656 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); | |
80856e74 JB |
1657 | } |
1658 | ||
dfcf069d | 1659 | void |
971de7fb | 1660 | syms_of_callproc (void) |
80856e74 | 1661 | { |
f92d51d8 CY |
1662 | #ifndef DOS_NT |
1663 | Vtemp_file_name_pattern = build_string ("emacsXXXXXX"); | |
1664 | #elif defined (WINDOWSNT) | |
1665 | Vtemp_file_name_pattern = build_string ("emXXXXXX"); | |
1666 | #else | |
1667 | Vtemp_file_name_pattern = build_string ("detmp.XXX"); | |
1668 | #endif | |
1669 | staticpro (&Vtemp_file_name_pattern); | |
1670 | ||
29208e82 | 1671 | DEFVAR_LISP ("shell-file-name", Vshell_file_name, |
fb7ada5f | 1672 | doc: /* File name to load inferior shells from. |
b20b29be EZ |
1673 | Initialized from the SHELL environment variable, or to a system-dependent |
1674 | default if SHELL is not set. */); | |
80856e74 | 1675 | |
29208e82 | 1676 | DEFVAR_LISP ("exec-path", Vexec_path, |
fb7ada5f | 1677 | doc: /* List of directories to search programs to run in subprocesses. |
fdb82f93 | 1678 | Each element is a string (directory name) or nil (try default directory). */); |
80856e74 | 1679 | |
29208e82 | 1680 | DEFVAR_LISP ("exec-suffixes", Vexec_suffixes, |
fb7ada5f | 1681 | doc: /* List of suffixes to try to find executable file names. |
fdb82f93 | 1682 | Each element is a string. */); |
33d5af99 | 1683 | Vexec_suffixes = Qnil; |
b81a1b72 | 1684 | |
29208e82 | 1685 | DEFVAR_LISP ("exec-directory", Vexec_directory, |
fdb82f93 PJ |
1686 | doc: /* Directory for executables for Emacs to invoke. |
1687 | More generally, this includes any architecture-dependent files | |
1688 | that are built and installed from the Emacs distribution. */); | |
e576cab4 | 1689 | |
29208e82 | 1690 | DEFVAR_LISP ("data-directory", Vdata_directory, |
fdb82f93 PJ |
1691 | doc: /* Directory of machine-independent files that come with GNU Emacs. |
1692 | These are files intended for Emacs to use while it runs. */); | |
80856e74 | 1693 | |
29208e82 | 1694 | DEFVAR_LISP ("doc-directory", Vdoc_directory, |
fdb82f93 | 1695 | doc: /* Directory containing the DOC file that comes with GNU Emacs. |
ebf24b59 | 1696 | This is usually the same as `data-directory'. */); |
35a2f4b8 | 1697 | |
29208e82 | 1698 | DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory, |
fdb82f93 PJ |
1699 | doc: /* For internal use by the build procedure only. |
1700 | This is the name of the directory in which the build procedure installed | |
ebf24b59 | 1701 | Emacs's info files; the default value for `Info-default-directory-list' |
fdb82f93 | 1702 | includes this. */); |
ed61592a JB |
1703 | Vconfigure_info_directory = build_string (PATH_INFO); |
1704 | ||
29208e82 | 1705 | DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory, |
b065672a CW |
1706 | doc: /* Directory of score files for games which come with GNU Emacs. |
1707 | If this variable is nil, then Emacs is unable to use a shared directory. */); | |
40b49d4b JB |
1708 | #ifdef DOS_NT |
1709 | Vshared_game_score_directory = Qnil; | |
1710 | #else | |
63789758 | 1711 | Vshared_game_score_directory = build_string (PATH_GAME); |
40b49d4b | 1712 | #endif |
b065672a | 1713 | |
29208e82 | 1714 | DEFVAR_LISP ("initial-environment", Vinitial_environment, |
6b8e474c SM |
1715 | doc: /* List of environment variables inherited from the parent process. |
1716 | Each element should be a string of the form ENVVARNAME=VALUE. | |
1717 | The elements must normally be decoded (using `locale-coding-system') for use. */); | |
1718 | Vinitial_environment = Qnil; | |
1719 | ||
29208e82 | 1720 | DEFVAR_LISP ("process-environment", Vprocess_environment, |
5990851d | 1721 | doc: /* List of overridden environment variables for subprocesses to inherit. |
fdb82f93 | 1722 | Each element should be a string of the form ENVVARNAME=VALUE. |
5990851d | 1723 | |
a13f8f50 KL |
1724 | Entries in this list take precedence to those in the frame-local |
1725 | environments. Therefore, let-binding `process-environment' is an easy | |
1726 | way to temporarily change the value of an environment variable, | |
1727 | irrespective of where it comes from. To use `process-environment' to | |
1728 | remove an environment variable, include only its name in the list, | |
1729 | without "=VALUE". | |
5990851d KL |
1730 | |
1731 | This variable is set to nil when Emacs starts. | |
1732 | ||
fdb82f93 PJ |
1733 | If multiple entries define the same variable, the first one always |
1734 | takes precedence. | |
5990851d | 1735 | |
776a24a1 | 1736 | Non-ASCII characters are encoded according to the initial value of |
5990851d KL |
1737 | `locale-coding-system', i.e. the elements must normally be decoded for |
1738 | use. | |
1739 | ||
776a24a1 | 1740 | See `setenv' and `getenv'. */); |
86f5ca04 | 1741 | Vprocess_environment = Qnil; |
80856e74 | 1742 | |
80856e74 | 1743 | defsubr (&Scall_process); |
83fa009c | 1744 | defsubr (&Sgetenv_internal); |
e576cab4 | 1745 | defsubr (&Scall_process_region); |
80856e74 | 1746 | } |