Commit | Line | Data |
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80856e74 | 1 | /* Synchronous subprocess invocation for GNU Emacs. |
fe12847a | 2 | Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1999, 2000, 2001, |
8cabe764 GM |
3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
4 | Free Software Foundation, Inc. | |
80856e74 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
8 | GNU Emacs is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
684d6f5b | 10 | the Free Software Foundation; either version 3, or (at your option) |
80856e74 JB |
11 | any later version. |
12 | ||
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
20 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
80856e74 JB |
22 | |
23 | ||
68c45bf0 | 24 | #include <config.h> |
80856e74 | 25 | #include <signal.h> |
e576cab4 | 26 | #include <errno.h> |
565620a5 | 27 | #include <stdio.h> |
80856e74 | 28 | |
03695ace | 29 | #ifndef USE_CRT_DLL |
426b37ae | 30 | extern int errno; |
03695ace | 31 | #endif |
426b37ae | 32 | |
80856e74 JB |
33 | /* Define SIGCHLD as an alias for SIGCLD. */ |
34 | ||
35 | #if !defined (SIGCHLD) && defined (SIGCLD) | |
36 | #define SIGCHLD SIGCLD | |
37 | #endif /* SIGCLD */ | |
38 | ||
39 | #include <sys/types.h> | |
88a64fef | 40 | |
3cbd6585 GM |
41 | #ifdef HAVE_UNISTD_H |
42 | #include <unistd.h> | |
43 | #endif | |
44 | ||
80856e74 | 45 | #include <sys/file.h> |
776a24a1 | 46 | #ifdef HAVE_FCNTL_H |
472e83fe | 47 | #define INCLUDED_FCNTL |
80856e74 JB |
48 | #include <fcntl.h> |
49 | #endif | |
50 | ||
bad95d8f RS |
51 | #ifdef WINDOWSNT |
52 | #define NOMINMAX | |
53 | #include <windows.h> | |
54 | #include <stdlib.h> /* for proper declaration of environ */ | |
55 | #include <fcntl.h> | |
489f9371 | 56 | #include "w32.h" |
bad95d8f RS |
57 | #define _P_NOWAIT 1 /* from process.h */ |
58 | #endif | |
59 | ||
7e6c2178 | 60 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
472e83fe | 61 | #define INCLUDED_FCNTL |
7e6c2178 RS |
62 | #include <fcntl.h> |
63 | #include <sys/stat.h> | |
64 | #include <sys/param.h> | |
65 | #include <errno.h> | |
66 | #endif /* MSDOS */ | |
67 | ||
80856e74 JB |
68 | #ifndef O_RDONLY |
69 | #define O_RDONLY 0 | |
70 | #endif | |
71 | ||
72 | #ifndef O_WRONLY | |
73 | #define O_WRONLY 1 | |
74 | #endif | |
75 | ||
76 | #include "lisp.h" | |
77 | #include "commands.h" | |
78 | #include "buffer.h" | |
32d08644 | 79 | #include "charset.h" |
edf496dd | 80 | #include "ccl.h" |
32d08644 | 81 | #include "coding.h" |
f0b950cf | 82 | #include "composite.h" |
57bda87a | 83 | #include <epaths.h> |
80856e74 | 84 | #include "process.h" |
d177f194 | 85 | #include "syssignal.h" |
a129418f | 86 | #include "systty.h" |
aba637ec | 87 | #include "blockinput.h" |
f105f403 KL |
88 | #include "frame.h" |
89 | #include "termhooks.h" | |
80856e74 | 90 | |
5f027cea EZ |
91 | #ifdef MSDOS |
92 | #include "msdos.h" | |
93 | #endif | |
94 | ||
80856e74 JB |
95 | #ifdef VMS |
96 | extern noshare char **environ; | |
97 | #else | |
03695ace | 98 | #ifndef USE_CRT_DLL |
80856e74 JB |
99 | extern char **environ; |
100 | #endif | |
03695ace | 101 | #endif |
80856e74 | 102 | |
f95c3f91 | 103 | #ifdef HAVE_SETPGID |
2b7e8799 | 104 | #if !defined (USG) || defined (BSD_PGRPS) |
320695d8 | 105 | #undef setpgrp |
f95c3f91 GM |
106 | #define setpgrp setpgid |
107 | #endif | |
2b7e8799 | 108 | #endif |
f95c3f91 | 109 | |
b81a1b72 SM |
110 | Lisp_Object Vexec_path, Vexec_directory, Vexec_suffixes; |
111 | Lisp_Object Vdata_directory, Vdoc_directory; | |
1e7ce61b | 112 | Lisp_Object Vconfigure_info_directory, Vshared_game_score_directory; |
8abd035b | 113 | Lisp_Object Vtemp_file_name_pattern; |
80856e74 JB |
114 | |
115 | Lisp_Object Vshell_file_name; | |
116 | ||
6b8e474c | 117 | Lisp_Object Vprocess_environment, Vinitial_environment; |
80856e74 | 118 | |
bad95d8f | 119 | #ifdef DOS_NT |
093650fe | 120 | Lisp_Object Qbuffer_file_type; |
bad95d8f | 121 | #endif /* DOS_NT */ |
093650fe | 122 | |
e0f24100 | 123 | /* True if we are about to fork off a synchronous process or if we |
80856e74 JB |
124 | are waiting for it. */ |
125 | int synch_process_alive; | |
126 | ||
127 | /* Nonzero => this is a string explaining death of synchronous subprocess. */ | |
128 | char *synch_process_death; | |
129 | ||
ca498128 JD |
130 | /* Nonzero => this is the signal number that terminated the subprocess. */ |
131 | int synch_process_termsig; | |
132 | ||
80856e74 JB |
133 | /* If synch_process_death is zero, |
134 | this is exit code of synchronous subprocess. */ | |
135 | int synch_process_retcode; | |
f105f403 | 136 | |
80856e74 | 137 | \f |
37d54121 RS |
138 | /* Clean up when exiting Fcall_process. |
139 | On MSDOS, delete the temporary file on any kind of termination. | |
140 | On Unix, kill the process and any children on termination by signal. */ | |
141 | ||
142 | /* Nonzero if this is termination due to exit. */ | |
143 | static int call_process_exited; | |
144 | ||
d2bb6598 SM |
145 | EXFUN (Fgetenv_internal, 2); |
146 | ||
80856e74 JB |
147 | #ifndef VMS /* VMS version is in vmsproc.c. */ |
148 | ||
d177f194 JB |
149 | static Lisp_Object |
150 | call_process_kill (fdpid) | |
151 | Lisp_Object fdpid; | |
152 | { | |
68c45bf0 | 153 | emacs_close (XFASTINT (Fcar (fdpid))); |
d177f194 JB |
154 | EMACS_KILLPG (XFASTINT (Fcdr (fdpid)), SIGKILL); |
155 | synch_process_alive = 0; | |
156 | return Qnil; | |
157 | } | |
158 | ||
80856e74 JB |
159 | Lisp_Object |
160 | call_process_cleanup (fdpid) | |
161 | Lisp_Object fdpid; | |
162 | { | |
e39a993c | 163 | #if defined (MSDOS) |
7e6c2178 | 164 | /* for MSDOS fdpid is really (fd . tempfile) */ |
c1350752 KH |
165 | register Lisp_Object file; |
166 | file = Fcdr (fdpid); | |
68c45bf0 | 167 | emacs_close (XFASTINT (Fcar (fdpid))); |
d5db4077 KR |
168 | if (strcmp (SDATA (file), NULL_DEVICE) != 0) |
169 | unlink (SDATA (file)); | |
e39a993c | 170 | #else /* not MSDOS */ |
d177f194 JB |
171 | register int pid = XFASTINT (Fcdr (fdpid)); |
172 | ||
37d54121 | 173 | if (call_process_exited) |
6b6e798b | 174 | { |
68c45bf0 | 175 | emacs_close (XFASTINT (Fcar (fdpid))); |
6b6e798b RS |
176 | return Qnil; |
177 | } | |
37d54121 | 178 | |
d177f194 JB |
179 | if (EMACS_KILLPG (pid, SIGINT) == 0) |
180 | { | |
aed13378 | 181 | int count = SPECPDL_INDEX (); |
d177f194 JB |
182 | record_unwind_protect (call_process_kill, fdpid); |
183 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); | |
184 | immediate_quit = 1; | |
185 | QUIT; | |
186 | wait_for_termination (pid); | |
187 | immediate_quit = 0; | |
188 | specpdl_ptr = specpdl + count; /* Discard the unwind protect. */ | |
189 | message1 ("Waiting for process to die...done"); | |
190 | } | |
80856e74 | 191 | synch_process_alive = 0; |
68c45bf0 | 192 | emacs_close (XFASTINT (Fcar (fdpid))); |
7e6c2178 | 193 | #endif /* not MSDOS */ |
80856e74 JB |
194 | return Qnil; |
195 | } | |
196 | ||
197 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, | |
fdb82f93 PJ |
198 | doc: /* Call PROGRAM synchronously in separate process. |
199 | The remaining arguments are optional. | |
200 | The program's input comes from file INFILE (nil means `/dev/null'). | |
201 | Insert output in BUFFER before point; t means current buffer; | |
202 | nil for BUFFER means discard it; 0 means discard and don't wait. | |
203 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, | |
204 | REAL-BUFFER says what to do with standard output, as above, | |
205 | while STDERR-FILE says what to do with standard error in the child. | |
206 | STDERR-FILE may be nil (discard standard error output), | |
207 | t (mix it with ordinary output), or a file name string. | |
208 | ||
209 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
210 | Remaining arguments are strings passed as command arguments to PROGRAM. | |
211 | ||
a4feb144 RS |
212 | If executable PROGRAM can't be found as an executable, `call-process' |
213 | signals a Lisp error. `call-process' reports errors in execution of | |
214 | the program only through its return and output. | |
215 | ||
fdb82f93 PJ |
216 | If BUFFER is 0, `call-process' returns immediately with value nil. |
217 | Otherwise it waits for PROGRAM to terminate | |
218 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
219 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
220 | ||
221 | usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */) | |
fdb82f93 | 222 | (nargs, args) |
80856e74 JB |
223 | int nargs; |
224 | register Lisp_Object *args; | |
225 | { | |
0aa2630f KS |
226 | Lisp_Object infile, buffer, current_dir, path; |
227 | int display_p; | |
80856e74 JB |
228 | int fd[2]; |
229 | int filefd; | |
230 | register int pid; | |
4da256b1 KS |
231 | #define CALLPROC_BUFFER_SIZE_MIN (16 * 1024) |
232 | #define CALLPROC_BUFFER_SIZE_MAX (4 * CALLPROC_BUFFER_SIZE_MIN) | |
233 | char buf[CALLPROC_BUFFER_SIZE_MAX]; | |
234 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; | |
aed13378 | 235 | int count = SPECPDL_INDEX (); |
2d607244 | 236 | |
4d3b07fd KR |
237 | register const unsigned char **new_argv |
238 | = (const unsigned char **) alloca ((max (2, nargs - 2)) * sizeof (char *)); | |
80856e74 | 239 | struct buffer *old = current_buffer; |
39eaa782 RS |
240 | /* File to use for stderr in the child. |
241 | t means use same as standard output. */ | |
242 | Lisp_Object error_file; | |
7e6c2178 RS |
243 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
244 | char *outf, *tempfile; | |
245 | int outfilefd; | |
246 | #endif | |
80856e74 JB |
247 | #if 0 |
248 | int mask; | |
249 | #endif | |
32d08644 KH |
250 | struct coding_system process_coding; /* coding-system of process output */ |
251 | struct coding_system argument_coding; /* coding-system of arguments */ | |
09494912 RS |
252 | /* Set to the return value of Ffind_operation_coding_system. */ |
253 | Lisp_Object coding_systems; | |
254 | ||
255 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ | |
256 | coding_systems = Qt; | |
32d08644 | 257 | |
b7826503 | 258 | CHECK_STRING (args[0]); |
80856e74 | 259 | |
39eaa782 RS |
260 | error_file = Qt; |
261 | ||
7e6c2178 RS |
262 | #ifndef subprocesses |
263 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
177c0ea7 | 264 | if (nargs >= 3 |
09ffb8b5 | 265 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
266 | error ("Operating system cannot handle asynchronous subprocesses"); |
267 | #endif /* subprocesses */ | |
268 | ||
09494912 | 269 | /* Decide the coding-system for giving arguments. */ |
32d08644 KH |
270 | { |
271 | Lisp_Object val, *args2; | |
32d08644 KH |
272 | int i; |
273 | ||
274 | /* If arguments are supplied, we may have to encode them. */ | |
275 | if (nargs >= 5) | |
276 | { | |
30d57b8e RS |
277 | int must_encode = 0; |
278 | ||
e7c1c20e | 279 | for (i = 4; i < nargs; i++) |
b7826503 | 280 | CHECK_STRING (args[i]); |
e7c1c20e | 281 | |
a2286b5c | 282 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
283 | if (STRING_MULTIBYTE (args[i])) |
284 | must_encode = 1; | |
285 | ||
beacaab3 KH |
286 | if (!NILP (Vcoding_system_for_write)) |
287 | val = Vcoding_system_for_write; | |
30d57b8e | 288 | else if (! must_encode) |
beacaab3 KH |
289 | val = Qnil; |
290 | else | |
32d08644 KH |
291 | { |
292 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); | |
293 | args2[0] = Qcall_process; | |
294 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 295 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
776b95cb | 296 | if (CONSP (coding_systems)) |
70949dac | 297 | val = XCDR (coding_systems); |
776b95cb | 298 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 299 | val = XCDR (Vdefault_process_coding_system); |
beacaab3 KH |
300 | else |
301 | val = Qnil; | |
32d08644 KH |
302 | } |
303 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); | |
8acb7dad KH |
304 | if (argument_coding.common_flags & CODING_ASCII_INCOMPATIBLE_MASK) |
305 | setup_coding_system (Qraw_text, &argument_coding); | |
76a25e79 KH |
306 | if (argument_coding.eol_type == CODING_EOL_UNDECIDED) |
307 | argument_coding.eol_type = system_eol_type; | |
32d08644 | 308 | } |
32d08644 KH |
309 | } |
310 | ||
e576cab4 JB |
311 | if (nargs >= 2 && ! NILP (args[1])) |
312 | { | |
313 | infile = Fexpand_file_name (args[1], current_buffer->directory); | |
b7826503 | 314 | CHECK_STRING (infile); |
e576cab4 | 315 | } |
80856e74 | 316 | else |
5437e9f9 | 317 | infile = build_string (NULL_DEVICE); |
80856e74 | 318 | |
e576cab4 JB |
319 | if (nargs >= 3) |
320 | { | |
39eaa782 RS |
321 | buffer = args[2]; |
322 | ||
323 | /* If BUFFER is a list, its meaning is | |
324 | (BUFFER-FOR-STDOUT FILE-FOR-STDERR). */ | |
325 | if (CONSP (buffer)) | |
326 | { | |
70949dac | 327 | if (CONSP (XCDR (buffer))) |
45be8a1e | 328 | { |
a9d4f28a | 329 | Lisp_Object stderr_file; |
70949dac | 330 | stderr_file = XCAR (XCDR (buffer)); |
45be8a1e RS |
331 | |
332 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
333 | error_file = stderr_file; | |
334 | else | |
335 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
336 | } | |
337 | ||
70949dac | 338 | buffer = XCAR (buffer); |
39eaa782 | 339 | } |
044512ed | 340 | |
39eaa782 RS |
341 | if (!(EQ (buffer, Qnil) |
342 | || EQ (buffer, Qt) | |
3ffde7d6 | 343 | || INTEGERP (buffer))) |
e576cab4 | 344 | { |
39eaa782 RS |
345 | Lisp_Object spec_buffer; |
346 | spec_buffer = buffer; | |
50fe359b | 347 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
348 | /* Mention the buffer name for a better error message. */ |
349 | if (NILP (buffer)) | |
b7826503 PJ |
350 | CHECK_BUFFER (spec_buffer); |
351 | CHECK_BUFFER (buffer); | |
e576cab4 JB |
352 | } |
353 | } | |
177c0ea7 | 354 | else |
e576cab4 | 355 | buffer = Qnil; |
80856e74 | 356 | |
58616e67 JB |
357 | /* Make sure that the child will be able to chdir to the current |
358 | buffer's current directory, or its unhandled equivalent. We | |
359 | can't just have the child check for an error when it does the | |
360 | chdir, since it's in a vfork. | |
361 | ||
362 | We have to GCPRO around this because Fexpand_file_name, | |
363 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
364 | might call a file name handling function. The argument list is | |
365 | protected by the caller, so all we really have to worry about is | |
366 | buffer. */ | |
367 | { | |
34b87689 | 368 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
58616e67 JB |
369 | |
370 | current_dir = current_buffer->directory; | |
371 | ||
34b87689 | 372 | GCPRO4 (infile, buffer, current_dir, error_file); |
58616e67 | 373 | |
c52b0b34 KH |
374 | current_dir |
375 | = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir), | |
376 | Qnil); | |
58616e67 JB |
377 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
378 | report_file_error ("Setting current directory", | |
379 | Fcons (current_buffer->directory, Qnil)); | |
380 | ||
34b87689 KH |
381 | if (STRING_MULTIBYTE (infile)) |
382 | infile = ENCODE_FILE (infile); | |
383 | if (STRING_MULTIBYTE (current_dir)) | |
384 | current_dir = ENCODE_FILE (current_dir); | |
385 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) | |
386 | error_file = ENCODE_FILE (error_file); | |
58616e67 JB |
387 | UNGCPRO; |
388 | } | |
389 | ||
0aa2630f | 390 | display_p = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
80856e74 | 391 | |
d5db4077 | 392 | filefd = emacs_open (SDATA (infile), O_RDONLY, 0); |
80856e74 JB |
393 | if (filefd < 0) |
394 | { | |
34b87689 | 395 | infile = DECODE_FILE (infile); |
e576cab4 | 396 | report_file_error ("Opening process input file", Fcons (infile, Qnil)); |
80856e74 JB |
397 | } |
398 | /* Search for program; barf if not found. */ | |
c52b0b34 KH |
399 | { |
400 | struct gcpro gcpro1; | |
401 | ||
402 | GCPRO1 (current_dir); | |
5c150961 | 403 | openp (Vexec_path, args[0], Vexec_suffixes, &path, make_number (X_OK)); |
c52b0b34 KH |
404 | UNGCPRO; |
405 | } | |
012c6fcb | 406 | if (NILP (path)) |
80856e74 | 407 | { |
68c45bf0 | 408 | emacs_close (filefd); |
80856e74 JB |
409 | report_file_error ("Searching for program", Fcons (args[0], Qnil)); |
410 | } | |
8ee8f447 RS |
411 | |
412 | /* If program file name starts with /: for quoting a magic name, | |
413 | discard that. */ | |
414 | if (SBYTES (path) > 2 && SREF (path, 0) == '/' | |
415 | && SREF (path, 1) == ':') | |
416 | path = Fsubstring (path, make_number (2), Qnil); | |
417 | ||
d5db4077 | 418 | new_argv[0] = SDATA (path); |
c364e618 KH |
419 | if (nargs > 4) |
420 | { | |
421 | register int i; | |
c5bfa12b | 422 | struct gcpro gcpro1, gcpro2, gcpro3; |
c364e618 | 423 | |
c5bfa12b KH |
424 | GCPRO3 (infile, buffer, current_dir); |
425 | argument_coding.dst_multibyte = 0; | |
426 | for (i = 4; i < nargs; i++) | |
c364e618 | 427 | { |
c5bfa12b KH |
428 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); |
429 | if (CODING_REQUIRE_ENCODING (&argument_coding)) | |
c364e618 | 430 | { |
c5bfa12b KH |
431 | /* We must encode this argument. */ |
432 | args[i] = encode_coding_string (args[i], &argument_coding, 1); | |
433 | if (argument_coding.type == coding_type_ccl) | |
434 | setup_ccl_program (&(argument_coding.spec.ccl.encoder), Qnil); | |
c364e618 | 435 | } |
d5db4077 | 436 | new_argv[i - 3] = SDATA (args[i]); |
c364e618 | 437 | } |
c5bfa12b | 438 | UNGCPRO; |
db54baaa | 439 | new_argv[nargs - 3] = 0; |
c364e618 | 440 | } |
db54baaa KH |
441 | else |
442 | new_argv[1] = 0; | |
80856e74 | 443 | |
7e6c2178 | 444 | #ifdef MSDOS /* MW, July 1993 */ |
8a52365c | 445 | if ((outf = egetenv ("TMPDIR"))) |
7e6c2178 RS |
446 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); |
447 | else | |
448 | { | |
449 | tempfile = alloca (20); | |
450 | *tempfile = '\0'; | |
451 | } | |
452 | dostounix_filename (tempfile); | |
177c0ea7 | 453 | if (*tempfile == '\0' || tempfile[strlen (tempfile) - 1] != '/') |
7e6c2178 RS |
454 | strcat (tempfile, "/"); |
455 | strcat (tempfile, "detmp.XXX"); | |
456 | mktemp (tempfile); | |
457 | ||
458 | outfilefd = creat (tempfile, S_IREAD | S_IWRITE); | |
459 | if (outfilefd < 0) | |
460 | { | |
68c45bf0 | 461 | emacs_close (filefd); |
6f89d28a MB |
462 | report_file_error ("Opening process output file", |
463 | Fcons (build_string (tempfile), Qnil)); | |
7e6c2178 | 464 | } |
6f89d28a | 465 | fd[0] = filefd; |
2610078a | 466 | fd[1] = outfilefd; |
6f89d28a | 467 | #endif /* MSDOS */ |
7e6c2178 | 468 | |
d50d3dc8 | 469 | if (INTEGERP (buffer)) |
68c45bf0 | 470 | fd[1] = emacs_open (NULL_DEVICE, O_WRONLY, 0), fd[0] = -1; |
80856e74 JB |
471 | else |
472 | { | |
7e6c2178 | 473 | #ifndef MSDOS |
052062e0 | 474 | #endif |
80856e74 JB |
475 | #if 0 |
476 | /* Replaced by close_process_descs */ | |
477 | set_exclusive_use (fd[0]); | |
478 | #endif | |
479 | } | |
480 | ||
481 | { | |
482 | /* child_setup must clobber environ in systems with true vfork. | |
483 | Protect it from permanent change. */ | |
484 | register char **save_environ = environ; | |
485 | register int fd1 = fd[1]; | |
39eaa782 | 486 | int fd_error = fd1; |
80856e74 JB |
487 | |
488 | #if 0 /* Some systems don't have sigblock. */ | |
e065a56e | 489 | mask = sigblock (sigmask (SIGCHLD)); |
80856e74 JB |
490 | #endif |
491 | ||
492 | /* Record that we're about to create a synchronous process. */ | |
493 | synch_process_alive = 1; | |
494 | ||
5c03767e RS |
495 | /* These vars record information from process termination. |
496 | Clear them now before process can possibly terminate, | |
497 | to avoid timing error if process terminates soon. */ | |
498 | synch_process_death = 0; | |
499 | synch_process_retcode = 0; | |
ca498128 | 500 | synch_process_termsig = 0; |
5c03767e | 501 | |
39eaa782 | 502 | if (NILP (error_file)) |
68c45bf0 | 503 | fd_error = emacs_open (NULL_DEVICE, O_WRONLY, 0); |
39eaa782 RS |
504 | else if (STRINGP (error_file)) |
505 | { | |
506 | #ifdef DOS_NT | |
d5db4077 | 507 | fd_error = emacs_open (SDATA (error_file), |
68c45bf0 PE |
508 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, |
509 | S_IREAD | S_IWRITE); | |
39eaa782 | 510 | #else /* not DOS_NT */ |
d5db4077 | 511 | fd_error = creat (SDATA (error_file), 0666); |
39eaa782 RS |
512 | #endif /* not DOS_NT */ |
513 | } | |
514 | ||
515 | if (fd_error < 0) | |
516 | { | |
68c45bf0 | 517 | emacs_close (filefd); |
6f89d28a | 518 | if (fd[0] != filefd) |
68c45bf0 | 519 | emacs_close (fd[0]); |
39eaa782 | 520 | if (fd1 >= 0) |
68c45bf0 | 521 | emacs_close (fd1); |
6f89d28a MB |
522 | #ifdef MSDOS |
523 | unlink (tempfile); | |
524 | #endif | |
34b87689 KH |
525 | if (NILP (error_file)) |
526 | error_file = build_string (NULL_DEVICE); | |
527 | else if (STRINGP (error_file)) | |
528 | error_file = DECODE_FILE (error_file); | |
529 | report_file_error ("Cannot redirect stderr", Fcons (error_file, Qnil)); | |
39eaa782 | 530 | } |
89e1ec1d | 531 | |
2610078a | 532 | #ifdef MSDOS /* MW, July 1993 */ |
c17c4250 | 533 | /* Note that on MSDOS `child_setup' actually returns the child process |
2610078a KH |
534 | exit status, not its PID, so we assign it to `synch_process_retcode' |
535 | below. */ | |
c17c4250 EZ |
536 | pid = child_setup (filefd, outfilefd, fd_error, (char **) new_argv, |
537 | 0, current_dir); | |
39eaa782 | 538 | |
2610078a KH |
539 | /* Record that the synchronous process exited and note its |
540 | termination status. */ | |
541 | synch_process_alive = 0; | |
542 | synch_process_retcode = pid; | |
543 | if (synch_process_retcode < 0) /* means it couldn't be exec'ed */ | |
68c45bf0 | 544 | { |
ca9c0567 | 545 | synchronize_system_messages_locale (); |
68c45bf0 PE |
546 | synch_process_death = strerror (errno); |
547 | } | |
2610078a | 548 | |
68c45bf0 | 549 | emacs_close (outfilefd); |
2610078a | 550 | if (fd_error != outfilefd) |
68c45bf0 | 551 | emacs_close (fd_error); |
2610078a | 552 | fd1 = -1; /* No harm in closing that one! */ |
32d08644 KH |
553 | /* Since CRLF is converted to LF within `decode_coding', we can |
554 | always open a file with binary mode. */ | |
68c45bf0 | 555 | fd[0] = emacs_open (tempfile, O_RDONLY | O_BINARY, 0); |
2610078a KH |
556 | if (fd[0] < 0) |
557 | { | |
558 | unlink (tempfile); | |
68c45bf0 | 559 | emacs_close (filefd); |
2610078a KH |
560 | report_file_error ("Cannot re-open temporary file", Qnil); |
561 | } | |
562 | #else /* not MSDOS */ | |
bad95d8f | 563 | #ifdef WINDOWSNT |
2d607244 RS |
564 | pid = child_setup (filefd, fd1, fd_error, (char **) new_argv, |
565 | 0, current_dir); | |
bad95d8f | 566 | #else /* not WINDOWSNT */ |
aba637ec KS |
567 | BLOCK_INPUT; |
568 | ||
80856e74 JB |
569 | pid = vfork (); |
570 | ||
571 | if (pid == 0) | |
572 | { | |
573 | if (fd[0] >= 0) | |
68c45bf0 | 574 | emacs_close (fd[0]); |
1e7963c7 RS |
575 | #ifdef HAVE_SETSID |
576 | setsid (); | |
577 | #endif | |
578 | #if defined (USG) && !defined (BSD_PGRPS) | |
80856e74 JB |
579 | setpgrp (); |
580 | #else | |
581 | setpgrp (pid, pid); | |
582 | #endif /* USG */ | |
2d607244 RS |
583 | child_setup (filefd, fd1, fd_error, (char **) new_argv, |
584 | 0, current_dir); | |
80856e74 | 585 | } |
aba637ec KS |
586 | |
587 | UNBLOCK_INPUT; | |
bad95d8f | 588 | #endif /* not WINDOWSNT */ |
cd5f8f60 RS |
589 | |
590 | /* The MSDOS case did this already. */ | |
591 | if (fd_error >= 0) | |
68c45bf0 | 592 | emacs_close (fd_error); |
2610078a | 593 | #endif /* not MSDOS */ |
80856e74 | 594 | |
80856e74 JB |
595 | environ = save_environ; |
596 | ||
6b6e798b RS |
597 | /* Close most of our fd's, but not fd[0] |
598 | since we will use that to read input from. */ | |
68c45bf0 | 599 | emacs_close (filefd); |
799abb26 | 600 | if (fd1 >= 0 && fd1 != fd_error) |
68c45bf0 | 601 | emacs_close (fd1); |
80856e74 JB |
602 | } |
603 | ||
604 | if (pid < 0) | |
605 | { | |
6b6e798b | 606 | if (fd[0] >= 0) |
68c45bf0 | 607 | emacs_close (fd[0]); |
80856e74 JB |
608 | report_file_error ("Doing vfork", Qnil); |
609 | } | |
610 | ||
d50d3dc8 | 611 | if (INTEGERP (buffer)) |
80856e74 | 612 | { |
6b6e798b | 613 | if (fd[0] >= 0) |
68c45bf0 | 614 | emacs_close (fd[0]); |
80856e74 | 615 | #ifndef subprocesses |
e576cab4 JB |
616 | /* If Emacs has been built with asynchronous subprocess support, |
617 | we don't need to do this, I think because it will then have | |
618 | the facilities for handling SIGCHLD. */ | |
80856e74 JB |
619 | wait_without_blocking (); |
620 | #endif /* subprocesses */ | |
80856e74 JB |
621 | return Qnil; |
622 | } | |
623 | ||
6b6e798b | 624 | /* Enable sending signal if user quits below. */ |
37d54121 RS |
625 | call_process_exited = 0; |
626 | ||
e39a993c | 627 | #if defined(MSDOS) |
7e6c2178 RS |
628 | /* MSDOS needs different cleanup information. */ |
629 | record_unwind_protect (call_process_cleanup, | |
630 | Fcons (make_number (fd[0]), build_string (tempfile))); | |
631 | #else | |
80856e74 JB |
632 | record_unwind_protect (call_process_cleanup, |
633 | Fcons (make_number (fd[0]), make_number (pid))); | |
e39a993c | 634 | #endif /* not MSDOS */ |
80856e74 JB |
635 | |
636 | ||
d50d3dc8 | 637 | if (BUFFERP (buffer)) |
80856e74 JB |
638 | Fset_buffer (buffer); |
639 | ||
09494912 RS |
640 | if (NILP (buffer)) |
641 | { | |
642 | /* If BUFFER is nil, we must read process output once and then | |
643 | discard it, so setup coding system but with nil. */ | |
644 | setup_coding_system (Qnil, &process_coding); | |
645 | } | |
646 | else | |
647 | { | |
648 | Lisp_Object val, *args2; | |
649 | ||
650 | val = Qnil; | |
651 | if (!NILP (Vcoding_system_for_read)) | |
652 | val = Vcoding_system_for_read; | |
653 | else | |
654 | { | |
655 | if (EQ (coding_systems, Qt)) | |
656 | { | |
657 | int i; | |
658 | ||
659 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); | |
660 | args2[0] = Qcall_process; | |
661 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
662 | coding_systems | |
663 | = Ffind_operation_coding_system (nargs + 1, args2); | |
664 | } | |
665 | if (CONSP (coding_systems)) | |
70949dac | 666 | val = XCAR (coding_systems); |
09494912 | 667 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 668 | val = XCAR (Vdefault_process_coding_system); |
09494912 RS |
669 | else |
670 | val = Qnil; | |
671 | } | |
672 | setup_coding_system (Fcheck_coding_system (val), &process_coding); | |
673 | /* In unibyte mode, character code conversion should not take | |
674 | place but EOL conversion should. So, setup raw-text or one | |
675 | of the subsidiary according to the information just setup. */ | |
676 | if (NILP (current_buffer->enable_multibyte_characters) | |
677 | && !NILP (val)) | |
678 | setup_raw_text_coding_system (&process_coding); | |
679 | } | |
c5bfa12b KH |
680 | process_coding.src_multibyte = 0; |
681 | process_coding.dst_multibyte | |
682 | = (BUFFERP (buffer) | |
683 | ? ! NILP (XBUFFER (buffer)->enable_multibyte_characters) | |
684 | : ! NILP (current_buffer->enable_multibyte_characters)); | |
09494912 | 685 | |
80856e74 JB |
686 | immediate_quit = 1; |
687 | QUIT; | |
688 | ||
689 | { | |
690 | register int nread; | |
0ad477db | 691 | int first = 1; |
6e3bfbb2 | 692 | int total_read = 0; |
321fecde | 693 | int carryover = 0; |
0aa2630f | 694 | int display_on_the_fly = display_p; |
05b44e90 | 695 | struct coding_system saved_coding; |
f778b157 KH |
696 | int pt_orig = PT, pt_byte_orig = PT_BYTE; |
697 | int inserted; | |
05b44e90 KH |
698 | |
699 | saved_coding = process_coding; | |
f0b950cf KH |
700 | if (process_coding.composing != COMPOSITION_DISABLED) |
701 | coding_allocate_composition_data (&process_coding, PT); | |
60558b19 | 702 | while (1) |
80856e74 | 703 | { |
60558b19 RS |
704 | /* Repeatedly read until we've filled as much as possible |
705 | of the buffer size we have. But don't read | |
8e6208c5 | 706 | less than 1024--save that for the next bufferful. */ |
321fecde | 707 | nread = carryover; |
60558b19 | 708 | while (nread < bufsize - 1024) |
00fb3e95 | 709 | { |
4da256b1 | 710 | int this_read = emacs_read (fd[0], buf + nread, |
68c45bf0 | 711 | bufsize - nread); |
60558b19 RS |
712 | |
713 | if (this_read < 0) | |
714 | goto give_up; | |
715 | ||
716 | if (this_read == 0) | |
7a7ab107 KH |
717 | { |
718 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
719 | break; | |
720 | } | |
60558b19 RS |
721 | |
722 | nread += this_read; | |
7a7ab107 | 723 | total_read += this_read; |
60558b19 | 724 | |
7a7ab107 KH |
725 | if (display_on_the_fly) |
726 | break; | |
727 | } | |
60558b19 RS |
728 | |
729 | /* Now NREAD is the total amount of data in the buffer. */ | |
80856e74 | 730 | immediate_quit = 0; |
177c0ea7 | 731 | |
012c6fcb | 732 | if (!NILP (buffer)) |
32d08644 | 733 | { |
c5bfa12b | 734 | if (! CODING_MAY_REQUIRE_DECODING (&process_coding)) |
4da256b1 | 735 | insert_1_both (buf, nread, nread, 0, 1, 0); |
32d08644 KH |
736 | else |
737 | { /* We have to decode the input. */ | |
f0b950cf KH |
738 | int size; |
739 | char *decoding_buf; | |
32d08644 | 740 | |
f0b950cf KH |
741 | repeat_decoding: |
742 | size = decoding_buffer_size (&process_coding, nread); | |
743 | decoding_buf = (char *) xmalloc (size); | |
177c0ea7 | 744 | |
b252f801 KH |
745 | /* We can't use the macro CODING_REQUIRE_DETECTION |
746 | because it always returns nonzero if the coding | |
747 | system requires EOL detection. Here, we have to | |
748 | check only whether or not the coding system | |
749 | requires text-encoding detection. */ | |
750 | if (process_coding.type == coding_type_undecided) | |
950a45d0 | 751 | { |
4da256b1 | 752 | detect_coding (&process_coding, buf, nread); |
950a45d0 | 753 | if (process_coding.composing != COMPOSITION_DISABLED) |
07c381ad KH |
754 | /* We have not yet allocated the composition |
755 | data because the coding type was undecided. */ | |
950a45d0 KH |
756 | coding_allocate_composition_data (&process_coding, PT); |
757 | } | |
2d892150 KH |
758 | if (process_coding.cmp_data) |
759 | process_coding.cmp_data->char_offset = PT; | |
177c0ea7 | 760 | |
4da256b1 | 761 | decode_coding (&process_coding, buf, decoding_buf, |
321fecde | 762 | nread, size); |
177c0ea7 | 763 | |
7a7ab107 KH |
764 | if (display_on_the_fly |
765 | && saved_coding.type == coding_type_undecided | |
766 | && process_coding.type != coding_type_undecided) | |
767 | { | |
768 | /* We have detected some coding system. But, | |
769 | there's a possibility that the detection was | |
0aa2630f KS |
770 | done by insufficient data. So, we try the code |
771 | detection again with more data. */ | |
a871dd58 | 772 | xfree (decoding_buf); |
7a7ab107 KH |
773 | display_on_the_fly = 0; |
774 | process_coding = saved_coding; | |
775 | carryover = nread; | |
0aa2630f KS |
776 | /* This is to make the above condition always |
777 | fails in the future. */ | |
778 | saved_coding.type = coding_type_no_conversion; | |
7a7ab107 KH |
779 | continue; |
780 | } | |
177c0ea7 | 781 | |
321fecde | 782 | if (process_coding.produced > 0) |
2d892150 KH |
783 | insert_1_both (decoding_buf, process_coding.produced_char, |
784 | process_coding.produced, 0, 1, 0); | |
a871dd58 | 785 | xfree (decoding_buf); |
7bdba03c GM |
786 | |
787 | if (process_coding.result == CODING_FINISH_INCONSISTENT_EOL) | |
788 | { | |
789 | Lisp_Object eol_type, coding; | |
790 | ||
791 | if (process_coding.eol_type == CODING_EOL_CR) | |
792 | { | |
793 | /* CRs have been replaced with LFs. Undo | |
794 | that in the text inserted above. */ | |
795 | unsigned char *p; | |
177c0ea7 | 796 | |
7bdba03c | 797 | move_gap_both (PT, PT_BYTE); |
177c0ea7 | 798 | |
7bdba03c GM |
799 | p = BYTE_POS_ADDR (pt_byte_orig); |
800 | for (; p < GPT_ADDR; ++p) | |
801 | if (*p == '\n') | |
802 | *p = '\r'; | |
803 | } | |
804 | else if (process_coding.eol_type == CODING_EOL_CRLF) | |
805 | { | |
806 | /* CR LFs have been replaced with LFs. Undo | |
807 | that by inserting CRs in front of LFs in | |
808 | the text inserted above. */ | |
809 | EMACS_INT bytepos, old_pt, old_pt_byte, nCR; | |
810 | ||
811 | old_pt = PT; | |
812 | old_pt_byte = PT_BYTE; | |
813 | nCR = 0; | |
177c0ea7 | 814 | |
7bdba03c GM |
815 | for (bytepos = PT_BYTE - 1; |
816 | bytepos >= pt_byte_orig; | |
817 | --bytepos) | |
818 | if (FETCH_BYTE (bytepos) == '\n') | |
819 | { | |
820 | EMACS_INT charpos = BYTE_TO_CHAR (bytepos); | |
821 | TEMP_SET_PT_BOTH (charpos, bytepos); | |
822 | insert_1_both ("\r", 1, 1, 0, 1, 0); | |
823 | ++nCR; | |
824 | } | |
825 | ||
826 | TEMP_SET_PT_BOTH (old_pt + nCR, old_pt_byte + nCR); | |
827 | } | |
828 | ||
829 | /* Set the coding system symbol to that for | |
830 | Unix-like EOL. */ | |
831 | eol_type = Fget (saved_coding.symbol, Qeol_type); | |
832 | if (VECTORP (eol_type) | |
833 | && ASIZE (eol_type) == 3 | |
834 | && SYMBOLP (AREF (eol_type, CODING_EOL_LF))) | |
835 | coding = AREF (eol_type, CODING_EOL_LF); | |
836 | else | |
837 | coding = saved_coding.symbol; | |
177c0ea7 | 838 | |
7bdba03c GM |
839 | process_coding.symbol = coding; |
840 | process_coding.eol_type = CODING_EOL_LF; | |
841 | process_coding.mode | |
842 | &= ~CODING_MODE_INHIBIT_INCONSISTENT_EOL; | |
843 | } | |
177c0ea7 | 844 | |
f0b950cf KH |
845 | nread -= process_coding.consumed; |
846 | carryover = nread; | |
321fecde | 847 | if (carryover > 0) |
c5bfa12b KH |
848 | /* As CARRYOVER should not be that large, we had |
849 | better avoid overhead of bcopy. */ | |
4da256b1 | 850 | BCOPY_SHORT (buf + process_coding.consumed, buf, |
c5bfa12b | 851 | carryover); |
f0b950cf KH |
852 | if (process_coding.result == CODING_FINISH_INSUFFICIENT_CMP) |
853 | { | |
854 | /* The decoding ended because of insufficient data | |
855 | area to record information about composition. | |
856 | We must try decoding with additional data area | |
2d892150 | 857 | before reading more output for the process. */ |
f0b950cf KH |
858 | coding_allocate_composition_data (&process_coding, PT); |
859 | goto repeat_decoding; | |
860 | } | |
32d08644 KH |
861 | } |
862 | } | |
c5bfa12b | 863 | |
321fecde | 864 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
c5bfa12b | 865 | break; |
6e3bfbb2 | 866 | |
4da256b1 | 867 | #if (CALLPROC_BUFFER_SIZE_MIN != CALLPROC_BUFFER_SIZE_MAX) |
6e3bfbb2 | 868 | /* Make the buffer bigger as we continue to read more data, |
4da256b1 KS |
869 | but not past CALLPROC_BUFFER_SIZE_MAX. */ |
870 | if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) | |
871 | if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) | |
872 | bufsize = CALLPROC_BUFFER_SIZE_MAX; | |
873 | #endif | |
6e3bfbb2 | 874 | |
0aa2630f | 875 | if (display_p) |
0ad477db RS |
876 | { |
877 | if (first) | |
878 | prepare_menu_bars (); | |
879 | first = 0; | |
3007ebfb | 880 | redisplay_preserve_echo_area (1); |
0aa2630f KS |
881 | /* This variable might have been set to 0 for code |
882 | detection. In that case, we set it back to 1 because | |
883 | we should have already detected a coding system. */ | |
884 | display_on_the_fly = 1; | |
0ad477db | 885 | } |
80856e74 JB |
886 | immediate_quit = 1; |
887 | QUIT; | |
888 | } | |
60558b19 | 889 | give_up: ; |
80856e74 | 890 | |
2d892150 KH |
891 | if (!NILP (buffer) |
892 | && process_coding.cmp_data) | |
893 | { | |
894 | coding_restore_composition (&process_coding, Fcurrent_buffer ()); | |
895 | coding_free_composition_data (&process_coding); | |
896 | } | |
f0b950cf | 897 | |
838c9726 | 898 | { |
aed13378 | 899 | int post_read_count = SPECPDL_INDEX (); |
838c9726 KH |
900 | |
901 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
902 | inserted = PT - pt_orig; | |
903 | TEMP_SET_PT_BOTH (pt_orig, pt_byte_orig); | |
904 | if (SYMBOLP (process_coding.post_read_conversion) | |
905 | && !NILP (Ffboundp (process_coding.post_read_conversion))) | |
906 | call1 (process_coding.post_read_conversion, make_number (inserted)); | |
f778b157 | 907 | |
838c9726 | 908 | Vlast_coding_system_used = process_coding.symbol; |
bbd29cfe | 909 | |
838c9726 KH |
910 | /* If the caller required, let the buffer inherit the |
911 | coding-system used to decode the process output. */ | |
912 | if (inherit_process_coding_system) | |
913 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
914 | make_number (total_read)); | |
915 | ||
916 | unbind_to (post_read_count, Qnil); | |
917 | } | |
3b440bb5 EZ |
918 | } |
919 | ||
80856e74 JB |
920 | /* Wait for it to terminate, unless it already has. */ |
921 | wait_for_termination (pid); | |
922 | ||
923 | immediate_quit = 0; | |
924 | ||
925 | set_buffer_internal (old); | |
926 | ||
37d54121 RS |
927 | /* Don't kill any children that the subprocess may have left behind |
928 | when exiting. */ | |
929 | call_process_exited = 1; | |
930 | ||
80856e74 JB |
931 | unbind_to (count, Qnil); |
932 | ||
ca498128 JD |
933 | if (synch_process_termsig) |
934 | { | |
935 | char *signame; | |
936 | ||
937 | synchronize_system_messages_locale (); | |
938 | signame = strsignal (synch_process_termsig); | |
939 | ||
940 | if (signame == 0) | |
941 | signame = "unknown"; | |
942 | ||
943 | synch_process_death = signame; | |
944 | } | |
945 | ||
80856e74 | 946 | if (synch_process_death) |
68c45bf0 PE |
947 | return code_convert_string_norecord (build_string (synch_process_death), |
948 | Vlocale_coding_system, 0); | |
80856e74 JB |
949 | return make_number (synch_process_retcode); |
950 | } | |
951 | #endif | |
952 | \f | |
9fefd2ba | 953 | static Lisp_Object |
80856e74 JB |
954 | delete_temp_file (name) |
955 | Lisp_Object name; | |
956 | { | |
1a271e14 KR |
957 | /* Suppress jka-compr handling, etc. */ |
958 | int count = SPECPDL_INDEX (); | |
959 | specbind (intern ("file-name-handler-alist"), Qnil); | |
2e3dc201 | 960 | internal_delete_file (name); |
1a271e14 | 961 | unbind_to (count, Qnil); |
320695d8 | 962 | return Qnil; |
80856e74 JB |
963 | } |
964 | ||
965 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
fdb82f93 PJ |
966 | 3, MANY, 0, |
967 | doc: /* Send text from START to END to a synchronous process running PROGRAM. | |
968 | The remaining arguments are optional. | |
969 | Delete the text if fourth arg DELETE is non-nil. | |
970 | ||
971 | Insert output in BUFFER before point; t means current buffer; | |
972 | nil for BUFFER means discard it; 0 means discard and don't wait. | |
973 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, | |
974 | REAL-BUFFER says what to do with standard output, as above, | |
975 | while STDERR-FILE says what to do with standard error in the child. | |
976 | STDERR-FILE may be nil (discard standard error output), | |
977 | t (mix it with ordinary output), or a file name string. | |
978 | ||
979 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
980 | Remaining args are passed to PROGRAM at startup as command args. | |
981 | ||
ba9a5174 | 982 | If BUFFER is 0, `call-process-region' returns immediately with value nil. |
fdb82f93 PJ |
983 | Otherwise it waits for PROGRAM to terminate |
984 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
985 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
986 | ||
987 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) | |
fdb82f93 | 988 | (nargs, args) |
80856e74 JB |
989 | int nargs; |
990 | register Lisp_Object *args; | |
991 | { | |
39323a7e KH |
992 | struct gcpro gcpro1; |
993 | Lisp_Object filename_string; | |
994 | register Lisp_Object start, end; | |
aed13378 | 995 | int count = SPECPDL_INDEX (); |
08ee4e87 | 996 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
09494912 | 997 | Lisp_Object coding_systems; |
32d08644 KH |
998 | Lisp_Object val, *args2; |
999 | int i; | |
bad95d8f | 1000 | #ifdef DOS_NT |
7e6c2178 | 1001 | char *tempfile; |
7e6c2178 RS |
1002 | char *outf = '\0'; |
1003 | ||
8a52365c EZ |
1004 | if ((outf = egetenv ("TMPDIR")) |
1005 | || (outf = egetenv ("TMP")) | |
1006 | || (outf = egetenv ("TEMP"))) | |
7e6c2178 RS |
1007 | strcpy (tempfile = alloca (strlen (outf) + 20), outf); |
1008 | else | |
1009 | { | |
1010 | tempfile = alloca (20); | |
1011 | *tempfile = '\0'; | |
1012 | } | |
0774fcf8 | 1013 | if (!IS_DIRECTORY_SEP (tempfile[strlen (tempfile) - 1])) |
7e6c2178 | 1014 | strcat (tempfile, "/"); |
5711b547 RS |
1015 | if ('/' == DIRECTORY_SEP) |
1016 | dostounix_filename (tempfile); | |
1017 | else | |
1018 | unixtodos_filename (tempfile); | |
0774fcf8 RS |
1019 | #ifdef WINDOWSNT |
1020 | strcat (tempfile, "emXXXXXX"); | |
1021 | #else | |
7e6c2178 | 1022 | strcat (tempfile, "detmp.XXX"); |
0774fcf8 | 1023 | #endif |
bad95d8f | 1024 | #else /* not DOS_NT */ |
d5db4077 KR |
1025 | char *tempfile = (char *) alloca (SBYTES (Vtemp_file_name_pattern) + 1); |
1026 | bcopy (SDATA (Vtemp_file_name_pattern), tempfile, | |
1027 | SBYTES (Vtemp_file_name_pattern) + 1); | |
bad95d8f | 1028 | #endif /* not DOS_NT */ |
7e6c2178 | 1029 | |
09494912 RS |
1030 | coding_systems = Qt; |
1031 | ||
1ddc85a4 DL |
1032 | #ifdef HAVE_MKSTEMP |
1033 | { | |
d277f1f7 YM |
1034 | int fd; |
1035 | ||
1036 | BLOCK_INPUT; | |
1037 | fd = mkstemp (tempfile); | |
1038 | UNBLOCK_INPUT; | |
1ddc85a4 DL |
1039 | if (fd == -1) |
1040 | report_file_error ("Failed to open temporary file", | |
1041 | Fcons (Vtemp_file_name_pattern, Qnil)); | |
1042 | else | |
1043 | close (fd); | |
1044 | } | |
1045 | #else | |
80856e74 | 1046 | mktemp (tempfile); |
1ddc85a4 | 1047 | #endif |
80856e74 JB |
1048 | |
1049 | filename_string = build_string (tempfile); | |
39323a7e | 1050 | GCPRO1 (filename_string); |
80856e74 JB |
1051 | start = args[0]; |
1052 | end = args[1]; | |
32d08644 | 1053 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
1054 | if (!NILP (Vcoding_system_for_write)) |
1055 | val = Vcoding_system_for_write; | |
1056 | else if (NILP (current_buffer->enable_multibyte_characters)) | |
32d08644 KH |
1057 | val = Qnil; |
1058 | else | |
beacaab3 | 1059 | { |
91489411 RS |
1060 | args2 = (Lisp_Object *) alloca ((nargs + 1) * sizeof *args2); |
1061 | args2[0] = Qcall_process_region; | |
1062 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1063 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); | |
1064 | if (CONSP (coding_systems)) | |
70949dac | 1065 | val = XCDR (coding_systems); |
91489411 | 1066 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 1067 | val = XCDR (Vdefault_process_coding_system); |
beacaab3 | 1068 | else |
91489411 | 1069 | val = Qnil; |
beacaab3 | 1070 | } |
32d08644 | 1071 | |
168afdaa | 1072 | { |
aed13378 | 1073 | int count1 = SPECPDL_INDEX (); |
168afdaa RS |
1074 | |
1075 | specbind (intern ("coding-system-for-write"), val); | |
bb951f0e KR |
1076 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
1077 | happen to get a ".Z" suffix. */ | |
1078 | specbind (intern ("file-name-handler-alist"), Qnil); | |
168afdaa RS |
1079 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil); |
1080 | ||
1081 | unbind_to (count1, Qnil); | |
1082 | } | |
91489411 | 1083 | |
177c0ea7 | 1084 | /* Note that Fcall_process takes care of binding |
91489411 | 1085 | coding-system-for-read. */ |
093650fe | 1086 | |
80856e74 JB |
1087 | record_unwind_protect (delete_temp_file, filename_string); |
1088 | ||
edf496dd | 1089 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
1090 | Fdelete_region (start, end); |
1091 | ||
edf496dd KH |
1092 | if (nargs > 3) |
1093 | { | |
1094 | args += 2; | |
1095 | nargs -= 2; | |
1096 | } | |
1097 | else | |
1098 | { | |
1099 | args[0] = args[2]; | |
1100 | nargs = 2; | |
1101 | } | |
1102 | args[1] = filename_string; | |
80856e74 | 1103 | |
edf496dd | 1104 | RETURN_UNGCPRO (unbind_to (count, Fcall_process (nargs, args))); |
80856e74 JB |
1105 | } |
1106 | \f | |
1107 | #ifndef VMS /* VMS version is in vmsproc.c. */ | |
1108 | ||
dfcf069d AS |
1109 | static int relocate_fd (); |
1110 | ||
5990851d KL |
1111 | static char ** |
1112 | add_env (char **env, char **new_env, char *string) | |
1113 | { | |
1114 | char **ep; | |
1115 | int ok = 1; | |
1116 | if (string == NULL) | |
1117 | return new_env; | |
1118 | ||
1119 | /* See if this string duplicates any string already in the env. | |
1120 | If so, don't put it in. | |
1121 | When an env var has multiple definitions, | |
1122 | we keep the definition that comes first in process-environment. */ | |
1123 | for (ep = env; ok && ep != new_env; ep++) | |
1124 | { | |
1125 | char *p = *ep, *q = string; | |
1126 | while (ok) | |
1127 | { | |
1128 | if (*q != *p) | |
1129 | break; | |
1130 | if (*q == 0) | |
1131 | /* The string is a lone variable name; keep it for now, we | |
1132 | will remove it later. It is a placeholder for a | |
1133 | variable that is not to be included in the environment. */ | |
1134 | break; | |
1135 | if (*q == '=') | |
1136 | ok = 0; | |
1137 | p++, q++; | |
1138 | } | |
1139 | } | |
1140 | if (ok) | |
1141 | *new_env++ = string; | |
1142 | return new_env; | |
1143 | } | |
1144 | ||
80856e74 JB |
1145 | /* This is the last thing run in a newly forked inferior |
1146 | either synchronous or asynchronous. | |
1147 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
1148 | Initialize inferior's priority, pgrp, connected dir and environment. | |
1149 | then exec another program based on new_argv. | |
1150 | ||
1151 | This function may change environ for the superior process. | |
1152 | Therefore, the superior process must save and restore the value | |
1153 | of environ around the vfork and the call to this function. | |
1154 | ||
80856e74 | 1155 | SET_PGRP is nonzero if we should put the subprocess into a separate |
177c0ea7 | 1156 | process group. |
e576cab4 JB |
1157 | |
1158 | CURRENT_DIR is an elisp string giving the path of the current | |
1159 | directory the subprocess should have. Since we can't really signal | |
1160 | a decent error from within the child, this should be verified as an | |
1161 | executable directory by the parent. */ | |
80856e74 | 1162 | |
dfcf069d | 1163 | int |
e576cab4 | 1164 | child_setup (in, out, err, new_argv, set_pgrp, current_dir) |
80856e74 JB |
1165 | int in, out, err; |
1166 | register char **new_argv; | |
80856e74 | 1167 | int set_pgrp; |
e576cab4 | 1168 | Lisp_Object current_dir; |
80856e74 | 1169 | { |
e576cab4 | 1170 | char **env; |
7fcf7f05 | 1171 | char *pwd_var; |
bad95d8f RS |
1172 | #ifdef WINDOWSNT |
1173 | int cpid; | |
4252a4bd | 1174 | HANDLE handles[3]; |
bad95d8f | 1175 | #endif /* WINDOWSNT */ |
e576cab4 | 1176 | |
33abe2d9 | 1177 | int pid = getpid (); |
80856e74 | 1178 | |
68d10241 | 1179 | #ifdef SET_EMACS_PRIORITY |
4f0b9d49 | 1180 | { |
31ade731 | 1181 | extern EMACS_INT emacs_priority; |
4f0b9d49 | 1182 | |
68d10241 RS |
1183 | if (emacs_priority < 0) |
1184 | nice (- emacs_priority); | |
4f0b9d49 | 1185 | } |
5b633aeb | 1186 | #endif |
80856e74 JB |
1187 | |
1188 | #ifdef subprocesses | |
1189 | /* Close Emacs's descriptors that this process should not have. */ | |
1190 | close_process_descs (); | |
1191 | #endif | |
c17c4250 EZ |
1192 | /* DOS_NT isn't in a vfork, so if we are in the middle of load-file, |
1193 | we will lose if we call close_load_descs here. */ | |
1194 | #ifndef DOS_NT | |
4458cebe | 1195 | close_load_descs (); |
c17c4250 | 1196 | #endif |
80856e74 JB |
1197 | |
1198 | /* Note that use of alloca is always safe here. It's obvious for systems | |
1199 | that do not have true vfork or that have true (stack) alloca. | |
caa01fe0 GM |
1200 | If using vfork and C_ALLOCA (when Emacs used to include |
1201 | src/alloca.c) it is safe because that changes the superior's | |
1202 | static variables as if the superior had done alloca and will be | |
1203 | cleaned up in the usual way. */ | |
e576cab4 | 1204 | { |
7fcf7f05 | 1205 | register char *temp; |
e576cab4 | 1206 | register int i; |
77d78be1 | 1207 | |
d5db4077 | 1208 | i = SBYTES (current_dir); |
16425c4a EZ |
1209 | #ifdef MSDOS |
1210 | /* MSDOS must have all environment variables malloc'ed, because | |
1211 | low-level libc functions that launch subsidiary processes rely | |
1212 | on that. */ | |
1213 | pwd_var = (char *) xmalloc (i + 6); | |
1214 | #else | |
7fcf7f05 | 1215 | pwd_var = (char *) alloca (i + 6); |
16425c4a | 1216 | #endif |
7fcf7f05 RS |
1217 | temp = pwd_var + 4; |
1218 | bcopy ("PWD=", pwd_var, 4); | |
d5db4077 | 1219 | bcopy (SDATA (current_dir), temp, i); |
bad95d8f | 1220 | if (!IS_DIRECTORY_SEP (temp[i - 1])) temp[i++] = DIRECTORY_SEP; |
e576cab4 JB |
1221 | temp[i] = 0; |
1222 | ||
c17c4250 | 1223 | #ifndef DOS_NT |
e576cab4 JB |
1224 | /* We can't signal an Elisp error here; we're in a vfork. Since |
1225 | the callers check the current directory before forking, this | |
1226 | should only return an error if the directory's permissions | |
1227 | are changed between the check and this chdir, but we should | |
1228 | at least check. */ | |
1229 | if (chdir (temp) < 0) | |
20b25e46 | 1230 | _exit (errno); |
b4c7684c | 1231 | #endif |
7fcf7f05 | 1232 | |
c17c4250 EZ |
1233 | #ifdef DOS_NT |
1234 | /* Get past the drive letter, so that d:/ is left alone. */ | |
1235 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
1236 | { | |
1237 | temp += 2; | |
1238 | i -= 2; | |
1239 | } | |
1240 | #endif | |
1241 | ||
7fcf7f05 | 1242 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 1243 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 1244 | temp[--i] = 0; |
e576cab4 | 1245 | } |
80856e74 | 1246 | |
5990851d | 1247 | /* Set `env' to a vector of the strings in the environment. */ |
80856e74 JB |
1248 | { |
1249 | register Lisp_Object tem; | |
1250 | register char **new_env; | |
5990851d | 1251 | char **p, **q; |
80856e74 | 1252 | register int new_length; |
d2bb6598 | 1253 | Lisp_Object display = Qnil; |
de87fb59 | 1254 | |
80856e74 | 1255 | new_length = 0; |
f105f403 | 1256 | |
5990851d KL |
1257 | for (tem = Vprocess_environment; |
1258 | CONSP (tem) && STRINGP (XCAR (tem)); | |
1259 | tem = XCDR (tem)) | |
d2bb6598 SM |
1260 | { |
1261 | if (strncmp (SDATA (XCAR (tem)), "DISPLAY", 7) == 0 | |
1262 | && (SDATA (XCAR (tem)) [7] == '\0' | |
1263 | || SDATA (XCAR (tem)) [7] == '=')) | |
1264 | /* DISPLAY is specified in process-environment. */ | |
1265 | display = Qt; | |
1266 | new_length++; | |
1267 | } | |
de87fb59 | 1268 | |
d2bb6598 SM |
1269 | /* If not provided yet, use the frame's DISPLAY. */ |
1270 | if (NILP (display)) | |
1271 | { | |
1272 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); | |
1273 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) | |
1274 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1275 | tmp = Fgetenv_internal (build_string ("DISPLAY"), | |
1276 | Vinitial_environment); | |
1277 | if (STRINGP (tmp)) | |
1278 | { | |
1279 | display = tmp; | |
1280 | new_length++; | |
1281 | } | |
1282 | } | |
80856e74 | 1283 | |
7fcf7f05 RS |
1284 | /* new_length + 2 to include PWD and terminating 0. */ |
1285 | env = new_env = (char **) alloca ((new_length + 2) * sizeof (char *)); | |
7fcf7f05 RS |
1286 | /* If we have a PWD envvar, pass one down, |
1287 | but with corrected value. */ | |
a13f8f50 | 1288 | if (egetenv ("PWD")) |
7fcf7f05 | 1289 | *new_env++ = pwd_var; |
5990851d | 1290 | |
6b8e474c | 1291 | if (STRINGP (display)) |
de87fb59 DN |
1292 | { |
1293 | int vlen = strlen ("DISPLAY=") + strlen (SDATA (display)) + 1; | |
1294 | char *vdata = (char *) alloca (vlen); | |
1295 | strcpy (vdata, "DISPLAY="); | |
1296 | strcat (vdata, SDATA (display)); | |
1297 | new_env = add_env (env, new_env, vdata); | |
1298 | } | |
1299 | ||
5990851d KL |
1300 | /* Overrides. */ |
1301 | for (tem = Vprocess_environment; | |
1302 | CONSP (tem) && STRINGP (XCAR (tem)); | |
1303 | tem = XCDR (tem)) | |
5990851d | 1304 | new_env = add_env (env, new_env, SDATA (XCAR (tem))); |
d2bb6598 | 1305 | |
5990851d KL |
1306 | *new_env = 0; |
1307 | ||
1308 | /* Remove variable names without values. */ | |
1309 | p = q = env; | |
1310 | while (*p != 0) | |
cd9565ba | 1311 | { |
5990851d | 1312 | while (*q != 0 && strchr (*q, '=') == NULL) |
1baf6db9 | 1313 | q++; |
5990851d KL |
1314 | *p = *q++; |
1315 | if (*p != 0) | |
1316 | p++; | |
cd9565ba | 1317 | } |
80856e74 | 1318 | } |
de87fb59 DN |
1319 | |
1320 | ||
bad95d8f RS |
1321 | #ifdef WINDOWSNT |
1322 | prepare_standard_handles (in, out, err, handles); | |
d5db4077 | 1323 | set_process_dir (SDATA (current_dir)); |
bad95d8f | 1324 | #else /* not WINDOWSNT */ |
426b37ae JB |
1325 | /* Make sure that in, out, and err are not actually already in |
1326 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1327 | started with its standard in, out, or error closed, as might |
426b37ae | 1328 | happen under X. */ |
f29f9e4a RS |
1329 | { |
1330 | int oin = in, oout = out; | |
1331 | ||
1332 | /* We have to avoid relocating the same descriptor twice! */ | |
1333 | ||
1334 | in = relocate_fd (in, 3); | |
1335 | ||
1336 | if (out == oin) | |
1337 | out = in; | |
1338 | else | |
3e9367e7 | 1339 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1340 | |
1341 | if (err == oin) | |
1342 | err = in; | |
1343 | else if (err == oout) | |
1344 | err = out; | |
1345 | else | |
3e9367e7 | 1346 | err = relocate_fd (err, 3); |
f29f9e4a | 1347 | } |
426b37ae | 1348 | |
c17c4250 | 1349 | #ifndef MSDOS |
68c45bf0 PE |
1350 | emacs_close (0); |
1351 | emacs_close (1); | |
1352 | emacs_close (2); | |
80856e74 JB |
1353 | |
1354 | dup2 (in, 0); | |
1355 | dup2 (out, 1); | |
1356 | dup2 (err, 2); | |
68c45bf0 PE |
1357 | emacs_close (in); |
1358 | emacs_close (out); | |
1359 | emacs_close (err); | |
c17c4250 | 1360 | #endif /* not MSDOS */ |
bad95d8f | 1361 | #endif /* not WINDOWSNT */ |
80856e74 | 1362 | |
6b2cd868 | 1363 | #if defined(USG) && !defined(BSD_PGRPS) |
fdba8590 | 1364 | #ifndef SETPGRP_RELEASES_CTTY |
e576cab4 | 1365 | setpgrp (); /* No arguments but equivalent in this case */ |
fdba8590 | 1366 | #endif |
e576cab4 JB |
1367 | #else |
1368 | setpgrp (pid, pid); | |
1369 | #endif /* USG */ | |
a129418f RS |
1370 | /* setpgrp_of_tty is incorrect here; it uses input_fd. */ |
1371 | EMACS_SET_TTY_PGRP (0, &pid); | |
80856e74 | 1372 | |
c17c4250 EZ |
1373 | #ifdef MSDOS |
1374 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
a3f0666f | 1375 | xfree (pwd_var); |
c17c4250 EZ |
1376 | if (pid == -1) |
1377 | /* An error occurred while trying to run the subprocess. */ | |
1378 | report_file_error ("Spawning child process", Qnil); | |
1379 | return pid; | |
1380 | #else /* not MSDOS */ | |
bad95d8f RS |
1381 | #ifdef WINDOWSNT |
1382 | /* Spawn the child. (See ntproc.c:Spawnve). */ | |
1383 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); | |
db77d785 | 1384 | reset_standard_handles (in, out, err, handles); |
ff27bfbe KH |
1385 | if (cpid == -1) |
1386 | /* An error occurred while trying to spawn the process. */ | |
1387 | report_file_error ("Spawning child process", Qnil); | |
bad95d8f RS |
1388 | return cpid; |
1389 | #else /* not WINDOWSNT */ | |
80856e74 JB |
1390 | /* execvp does not accept an environment arg so the only way |
1391 | to pass this environment is to set environ. Our caller | |
1392 | is responsible for restoring the ambient value of environ. */ | |
1393 | environ = env; | |
1394 | execvp (new_argv[0], new_argv); | |
1395 | ||
68c45bf0 PE |
1396 | emacs_write (1, "Can't exec program: ", 20); |
1397 | emacs_write (1, new_argv[0], strlen (new_argv[0])); | |
1398 | emacs_write (1, "\n", 1); | |
80856e74 | 1399 | _exit (1); |
bad95d8f | 1400 | #endif /* not WINDOWSNT */ |
7e6c2178 | 1401 | #endif /* not MSDOS */ |
80856e74 JB |
1402 | } |
1403 | ||
a3833dfe | 1404 | /* Move the file descriptor FD so that its number is not less than MINFD. |
426b37ae | 1405 | If the file descriptor is moved at all, the original is freed. */ |
dfcf069d | 1406 | static int |
a3833dfe KH |
1407 | relocate_fd (fd, minfd) |
1408 | int fd, minfd; | |
426b37ae | 1409 | { |
a3833dfe | 1410 | if (fd >= minfd) |
426b37ae JB |
1411 | return fd; |
1412 | else | |
1413 | { | |
1414 | int new = dup (fd); | |
1415 | if (new == -1) | |
1416 | { | |
20c018a0 | 1417 | char *message1 = "Error while setting up child: "; |
826c56ac | 1418 | char *errmessage = strerror (errno); |
20c018a0 | 1419 | char *message2 = "\n"; |
68c45bf0 PE |
1420 | emacs_write (2, message1, strlen (message1)); |
1421 | emacs_write (2, errmessage, strlen (errmessage)); | |
1422 | emacs_write (2, message2, strlen (message2)); | |
426b37ae JB |
1423 | _exit (1); |
1424 | } | |
1425 | /* Note that we hold the original FD open while we recurse, | |
1426 | to guarantee we'll get a new FD if we need it. */ | |
a3833dfe | 1427 | new = relocate_fd (new, minfd); |
68c45bf0 | 1428 | emacs_close (fd); |
426b37ae JB |
1429 | return new; |
1430 | } | |
1431 | } | |
1432 | ||
db699fc6 SM |
1433 | static int |
1434 | getenv_internal_1 (var, varlen, value, valuelen, env) | |
1435 | char *var; | |
1436 | int varlen; | |
1437 | char **value; | |
1438 | int *valuelen; | |
1439 | Lisp_Object env; | |
1440 | { | |
1441 | for (; CONSP (env); env = XCDR (env)) | |
1442 | { | |
1443 | Lisp_Object entry = XCAR (env); | |
1444 | if (STRINGP (entry) | |
1445 | && SBYTES (entry) >= varlen | |
1446 | #ifdef WINDOWSNT | |
1447 | /* NT environment variables are case insensitive. */ | |
1448 | && ! strnicmp (SDATA (entry), var, varlen) | |
1449 | #else /* not WINDOWSNT */ | |
1450 | && ! bcmp (SDATA (entry), var, varlen) | |
1451 | #endif /* not WINDOWSNT */ | |
1452 | ) | |
1453 | { | |
1454 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') | |
1455 | { | |
1456 | *value = (char *) SDATA (entry) + (varlen + 1); | |
1457 | *valuelen = SBYTES (entry) - (varlen + 1); | |
1458 | return 1; | |
1459 | } | |
1460 | else if (SBYTES (entry) == varlen) | |
1461 | { | |
1462 | /* Lone variable names in Vprocess_environment mean that | |
1463 | variable should be removed from the environment. */ | |
1464 | *value = NULL; | |
1465 | return 1; | |
1466 | } | |
1467 | } | |
1468 | } | |
1469 | return 0; | |
1470 | } | |
1471 | ||
012c6fcb | 1472 | static int |
da8e8fc1 | 1473 | getenv_internal (var, varlen, value, valuelen, frame) |
012c6fcb JA |
1474 | char *var; |
1475 | int varlen; | |
1476 | char **value; | |
1477 | int *valuelen; | |
da8e8fc1 | 1478 | Lisp_Object frame; |
012c6fcb | 1479 | { |
d2bb6598 SM |
1480 | /* Try to find VAR in Vprocess_environment first. */ |
1481 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1482 | Vprocess_environment)) | |
1483 | return *value ? 1 : 0; | |
f105f403 | 1484 | |
d2bb6598 | 1485 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
de87fb59 | 1486 | if (strcmp (var, "DISPLAY") == 0) |
d2bb6598 SM |
1487 | { |
1488 | Lisp_Object display | |
1489 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); | |
1490 | if (STRINGP (display)) | |
1491 | { | |
de87fb59 DN |
1492 | *value = (char *) SDATA (display); |
1493 | *valuelen = SBYTES (display); | |
1494 | return 1; | |
d2bb6598 SM |
1495 | } |
1496 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1497 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1498 | Vinitial_environment)) | |
1499 | return *value ? 1 : 0; | |
1500 | } | |
012c6fcb | 1501 | |
012c6fcb JA |
1502 | return 0; |
1503 | } | |
1504 | ||
f105f403 | 1505 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
5990851d KL |
1506 | doc: /* Get the value of environment variable VARIABLE. |
1507 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
1508 | the environment. Otherwise, value is a string. | |
f105f403 | 1509 | |
a13f8f50 KL |
1510 | This function searches `process-environment' for VARIABLE. If it is |
1511 | not found there, then it continues the search in the environment list | |
1512 | of the selected frame. | |
5990851d | 1513 | |
db699fc6 SM |
1514 | If optional parameter ENV is a list, then search this list instead of |
1515 | `process-environment', and return t when encountering a negative entry. | |
1516 | ||
1517 | If it is a frame, then this function will ignore `process-environment' and | |
1518 | will simply look up the variable in that frame's environment. */) | |
1519 | (variable, env) | |
1520 | Lisp_Object variable, env; | |
012c6fcb JA |
1521 | { |
1522 | char *value; | |
1523 | int valuelen; | |
1524 | ||
5990851d | 1525 | CHECK_STRING (variable); |
db699fc6 SM |
1526 | if (CONSP (env)) |
1527 | { | |
1528 | if (getenv_internal_1 (SDATA (variable), SBYTES (variable), | |
1529 | &value, &valuelen, env)) | |
1530 | return value ? make_string (value, valuelen) : Qt; | |
1531 | else | |
1532 | return Qnil; | |
1533 | } | |
1534 | else if (getenv_internal (SDATA (variable), SBYTES (variable), | |
d2bb6598 | 1535 | &value, &valuelen, env)) |
012c6fcb JA |
1536 | return make_string (value, valuelen); |
1537 | else | |
1538 | return Qnil; | |
1539 | } | |
1540 | ||
5990851d KL |
1541 | /* A version of getenv that consults the Lisp environment lists, |
1542 | easily callable from C. */ | |
012c6fcb JA |
1543 | char * |
1544 | egetenv (var) | |
e576cab4 | 1545 | char *var; |
012c6fcb JA |
1546 | { |
1547 | char *value; | |
1548 | int valuelen; | |
1549 | ||
f105f403 | 1550 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
012c6fcb JA |
1551 | return value; |
1552 | else | |
1553 | return 0; | |
1554 | } | |
1555 | ||
80856e74 JB |
1556 | #endif /* not VMS */ |
1557 | \f | |
8de15d69 | 1558 | /* This is run before init_cmdargs. */ |
177c0ea7 | 1559 | |
dfcf069d | 1560 | void |
8de15d69 RS |
1561 | init_callproc_1 () |
1562 | { | |
1563 | char *data_dir = egetenv ("EMACSDATA"); | |
35a2f4b8 KH |
1564 | char *doc_dir = egetenv ("EMACSDOC"); |
1565 | ||
8de15d69 | 1566 | Vdata_directory |
177c0ea7 | 1567 | = Ffile_name_as_directory (build_string (data_dir ? data_dir |
8de15d69 | 1568 | : PATH_DATA)); |
35a2f4b8 KH |
1569 | Vdoc_directory |
1570 | = Ffile_name_as_directory (build_string (doc_dir ? doc_dir | |
1571 | : PATH_DOC)); | |
9453ea7b | 1572 | |
e576cab4 | 1573 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1574 | PATH_EXEC path from epaths.h. */ |
e576cab4 | 1575 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); |
80856e74 JB |
1576 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
1577 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
8de15d69 RS |
1578 | } |
1579 | ||
e17f7533 | 1580 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1581 | |
dfcf069d | 1582 | void |
8de15d69 RS |
1583 | init_callproc () |
1584 | { | |
1585 | char *data_dir = egetenv ("EMACSDATA"); | |
177c0ea7 | 1586 | |
8de15d69 RS |
1587 | register char * sh; |
1588 | Lisp_Object tempdir; | |
1589 | ||
9cc4fad5 | 1590 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1591 | { |
05630743 RS |
1592 | /* Add to the path the lib-src subdir of the installation dir. */ |
1593 | Lisp_Object tem; | |
1594 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1595 | Vinstallation_directory); | |
bad95d8f | 1596 | #ifndef DOS_NT |
1a6640ec | 1597 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc | 1598 | if (NILP (Fmember (tem, Vexec_path))) |
70ec1377 RS |
1599 | { |
1600 | Vexec_path = decode_env_path ("EMACSPATH", PATH_EXEC); | |
1601 | Vexec_path = Fcons (tem, Vexec_path); | |
1602 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
1603 | } | |
177c0ea7 | 1604 | |
0fa248bc | 1605 | Vexec_directory = Ffile_name_as_directory (tem); |
bad95d8f | 1606 | #endif /* not DOS_NT */ |
8de15d69 | 1607 | |
e17f7533 RS |
1608 | /* Maybe use ../etc as well as ../lib-src. */ |
1609 | if (data_dir == 0) | |
1610 | { | |
1611 | tem = Fexpand_file_name (build_string ("etc"), | |
1612 | Vinstallation_directory); | |
1613 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1614 | } |
1615 | } | |
7e933683 RS |
1616 | |
1617 | /* Look for the files that should be in etc. We don't use | |
1618 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1619 | near the executable, and they are never in the build |
7e933683 RS |
1620 | directory when that's different from the source directory. |
1621 | ||
1622 | Instead, if these files are not in the nominal place, we try the | |
1623 | source directory. */ | |
1624 | if (data_dir == 0) | |
1625 | { | |
70ec1377 | 1626 | Lisp_Object tem, tem1, srcdir; |
7e933683 | 1627 | |
70ec1377 RS |
1628 | srcdir = Fexpand_file_name (build_string ("../src/"), |
1629 | build_string (PATH_DUMPLOADSEARCH)); | |
7e933683 RS |
1630 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); |
1631 | tem1 = Ffile_exists_p (tem); | |
70ec1377 | 1632 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
7e933683 | 1633 | { |
70ec1377 | 1634 | Lisp_Object newdir; |
7e933683 RS |
1635 | newdir = Fexpand_file_name (build_string ("../etc/"), |
1636 | build_string (PATH_DUMPLOADSEARCH)); | |
1637 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1638 | tem1 = Ffile_exists_p (tem); | |
1639 | if (!NILP (tem1)) | |
1640 | Vdata_directory = newdir; | |
1641 | } | |
1642 | } | |
80856e74 | 1643 | |
d883eb62 RS |
1644 | #ifndef CANNOT_DUMP |
1645 | if (initialized) | |
1646 | #endif | |
1647 | { | |
1648 | tempdir = Fdirectory_file_name (Vexec_directory); | |
d5db4077 | 1649 | if (access (SDATA (tempdir), 0) < 0) |
d883eb62 RS |
1650 | dir_warning ("Warning: arch-dependent data dir (%s) does not exist.\n", |
1651 | Vexec_directory); | |
1652 | } | |
80856e74 | 1653 | |
e576cab4 | 1654 | tempdir = Fdirectory_file_name (Vdata_directory); |
d5db4077 | 1655 | if (access (SDATA (tempdir), 0) < 0) |
76d5c6cf RS |
1656 | dir_warning ("Warning: arch-independent data dir (%s) does not exist.\n", |
1657 | Vdata_directory); | |
e576cab4 | 1658 | |
80856e74 JB |
1659 | #ifdef VMS |
1660 | Vshell_file_name = build_string ("*dcl*"); | |
1661 | #else | |
e576cab4 | 1662 | sh = (char *) getenv ("SHELL"); |
80856e74 JB |
1663 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
1664 | #endif | |
8abd035b RS |
1665 | |
1666 | #ifdef VMS | |
1667 | Vtemp_file_name_pattern = build_string ("tmp:emacsXXXXXX."); | |
1668 | #else | |
1669 | if (getenv ("TMPDIR")) | |
1670 | { | |
1671 | char *dir = getenv ("TMPDIR"); | |
1672 | Vtemp_file_name_pattern | |
a13f8f50 KL |
1673 | = Fexpand_file_name (build_string ("emacsXXXXXX"), |
1674 | build_string (dir)); | |
8abd035b RS |
1675 | } |
1676 | else | |
1677 | Vtemp_file_name_pattern = build_string ("/tmp/emacsXXXXXX"); | |
1678 | #endif | |
63789758 | 1679 | |
40b49d4b JB |
1680 | #ifdef DOS_NT |
1681 | Vshared_game_score_directory = Qnil; | |
1682 | #else | |
63789758 RS |
1683 | Vshared_game_score_directory = build_string (PATH_GAME); |
1684 | if (NILP (Ffile_directory_p (Vshared_game_score_directory))) | |
1685 | Vshared_game_score_directory = Qnil; | |
40b49d4b | 1686 | #endif |
9fefd2ba JB |
1687 | } |
1688 | ||
dfcf069d | 1689 | void |
a13f8f50 | 1690 | set_initial_environment () |
9fefd2ba JB |
1691 | { |
1692 | register char **envp; | |
80856e74 JB |
1693 | #ifndef CANNOT_DUMP |
1694 | if (initialized) | |
1695 | #endif | |
a13f8f50 KL |
1696 | { |
1697 | for (envp = environ; *envp; envp++) | |
de87fb59 DN |
1698 | Vprocess_environment = Fcons (build_string (*envp), |
1699 | Vprocess_environment); | |
3c33c79a SM |
1700 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent |
1701 | to use `delete' and friends on process-environment. */ | |
1702 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); | |
a13f8f50 | 1703 | } |
80856e74 JB |
1704 | } |
1705 | ||
dfcf069d | 1706 | void |
80856e74 JB |
1707 | syms_of_callproc () |
1708 | { | |
bad95d8f | 1709 | #ifdef DOS_NT |
093650fe RS |
1710 | Qbuffer_file_type = intern ("buffer-file-type"); |
1711 | staticpro (&Qbuffer_file_type); | |
bad95d8f | 1712 | #endif /* DOS_NT */ |
7e6c2178 | 1713 | |
80856e74 | 1714 | DEFVAR_LISP ("shell-file-name", &Vshell_file_name, |
fdb82f93 | 1715 | doc: /* *File name to load inferior shells from. |
b20b29be EZ |
1716 | Initialized from the SHELL environment variable, or to a system-dependent |
1717 | default if SHELL is not set. */); | |
80856e74 JB |
1718 | |
1719 | DEFVAR_LISP ("exec-path", &Vexec_path, | |
fdb82f93 PJ |
1720 | doc: /* *List of directories to search programs to run in subprocesses. |
1721 | Each element is a string (directory name) or nil (try default directory). */); | |
80856e74 | 1722 | |
b81a1b72 | 1723 | DEFVAR_LISP ("exec-suffixes", &Vexec_suffixes, |
fdb82f93 PJ |
1724 | doc: /* *List of suffixes to try to find executable file names. |
1725 | Each element is a string. */); | |
33d5af99 | 1726 | Vexec_suffixes = Qnil; |
b81a1b72 | 1727 | |
80856e74 | 1728 | DEFVAR_LISP ("exec-directory", &Vexec_directory, |
fdb82f93 PJ |
1729 | doc: /* Directory for executables for Emacs to invoke. |
1730 | More generally, this includes any architecture-dependent files | |
1731 | that are built and installed from the Emacs distribution. */); | |
e576cab4 JB |
1732 | |
1733 | DEFVAR_LISP ("data-directory", &Vdata_directory, | |
fdb82f93 PJ |
1734 | doc: /* Directory of machine-independent files that come with GNU Emacs. |
1735 | These are files intended for Emacs to use while it runs. */); | |
80856e74 | 1736 | |
35a2f4b8 | 1737 | DEFVAR_LISP ("doc-directory", &Vdoc_directory, |
fdb82f93 | 1738 | doc: /* Directory containing the DOC file that comes with GNU Emacs. |
ebf24b59 | 1739 | This is usually the same as `data-directory'. */); |
35a2f4b8 | 1740 | |
ed61592a | 1741 | DEFVAR_LISP ("configure-info-directory", &Vconfigure_info_directory, |
fdb82f93 PJ |
1742 | doc: /* For internal use by the build procedure only. |
1743 | This is the name of the directory in which the build procedure installed | |
ebf24b59 | 1744 | Emacs's info files; the default value for `Info-default-directory-list' |
fdb82f93 | 1745 | includes this. */); |
ed61592a JB |
1746 | Vconfigure_info_directory = build_string (PATH_INFO); |
1747 | ||
1e7ce61b | 1748 | DEFVAR_LISP ("shared-game-score-directory", &Vshared_game_score_directory, |
b065672a CW |
1749 | doc: /* Directory of score files for games which come with GNU Emacs. |
1750 | If this variable is nil, then Emacs is unable to use a shared directory. */); | |
40b49d4b JB |
1751 | #ifdef DOS_NT |
1752 | Vshared_game_score_directory = Qnil; | |
1753 | #else | |
63789758 | 1754 | Vshared_game_score_directory = build_string (PATH_GAME); |
40b49d4b | 1755 | #endif |
b065672a | 1756 | |
8abd035b | 1757 | DEFVAR_LISP ("temp-file-name-pattern", &Vtemp_file_name_pattern, |
fdb82f93 PJ |
1758 | doc: /* Pattern for making names for temporary files. |
1759 | This is used by `call-process-region'. */); | |
0537ec48 | 1760 | /* This variable is initialized in init_callproc. */ |
8abd035b | 1761 | |
6b8e474c SM |
1762 | DEFVAR_LISP ("initial-environment", &Vinitial_environment, |
1763 | doc: /* List of environment variables inherited from the parent process. | |
1764 | Each element should be a string of the form ENVVARNAME=VALUE. | |
1765 | The elements must normally be decoded (using `locale-coding-system') for use. */); | |
1766 | Vinitial_environment = Qnil; | |
1767 | ||
5990851d KL |
1768 | DEFVAR_LISP ("process-environment", &Vprocess_environment, |
1769 | doc: /* List of overridden environment variables for subprocesses to inherit. | |
1770 | Each element should be a string of the form ENVVARNAME=VALUE. | |
1771 | ||
a13f8f50 KL |
1772 | Entries in this list take precedence to those in the frame-local |
1773 | environments. Therefore, let-binding `process-environment' is an easy | |
1774 | way to temporarily change the value of an environment variable, | |
1775 | irrespective of where it comes from. To use `process-environment' to | |
1776 | remove an environment variable, include only its name in the list, | |
1777 | without "=VALUE". | |
5990851d KL |
1778 | |
1779 | This variable is set to nil when Emacs starts. | |
1780 | ||
1781 | If multiple entries define the same variable, the first one always | |
1782 | takes precedence. | |
1783 | ||
1784 | Non-ASCII characters are encoded according to the initial value of | |
1785 | `locale-coding-system', i.e. the elements must normally be decoded for | |
1786 | use. | |
1787 | ||
776a24a1 | 1788 | See `setenv' and `getenv'. */); |
86f5ca04 | 1789 | Vprocess_environment = Qnil; |
80856e74 JB |
1790 | |
1791 | #ifndef VMS | |
1792 | defsubr (&Scall_process); | |
83fa009c | 1793 | defsubr (&Sgetenv_internal); |
986ffb24 | 1794 | #endif |
e576cab4 | 1795 | defsubr (&Scall_process_region); |
80856e74 | 1796 | } |
ab5796a9 MB |
1797 | |
1798 | /* arch-tag: 769b8045-1df7-4d2b-8968-e3fb49017f95 | |
1799 | (do not change this comment) */ |