Commit | Line | Data |
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80856e74 | 1 | /* Synchronous subprocess invocation for GNU Emacs. |
acaf905b | 2 | Copyright (C) 1985-1988, 1993-1995, 1999-2012 |
19ed11ba | 3 | Free Software Foundation, Inc. |
80856e74 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
80856e74 | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
80856e74 JB |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
80856e74 JB |
19 | |
20 | ||
68c45bf0 | 21 | #include <config.h> |
e576cab4 | 22 | #include <errno.h> |
565620a5 | 23 | #include <stdio.h> |
80856e74 | 24 | #include <sys/types.h> |
3cbd6585 | 25 | #include <unistd.h> |
3cbd6585 | 26 | |
80856e74 | 27 | #include <sys/file.h> |
80856e74 | 28 | #include <fcntl.h> |
80856e74 | 29 | |
0898ca10 JB |
30 | #include "lisp.h" |
31 | ||
bad95d8f RS |
32 | #ifdef WINDOWSNT |
33 | #define NOMINMAX | |
34 | #include <windows.h> | |
489f9371 | 35 | #include "w32.h" |
bad95d8f RS |
36 | #define _P_NOWAIT 1 /* from process.h */ |
37 | #endif | |
38 | ||
7e6c2178 | 39 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
7e6c2178 RS |
40 | #include <sys/stat.h> |
41 | #include <sys/param.h> | |
7e6c2178 RS |
42 | #endif /* MSDOS */ |
43 | ||
80856e74 | 44 | #include "commands.h" |
91183bfd | 45 | #include "character.h" |
e5560ff7 | 46 | #include "buffer.h" |
edf496dd | 47 | #include "ccl.h" |
32d08644 | 48 | #include "coding.h" |
f0b950cf | 49 | #include "composite.h" |
57bda87a | 50 | #include <epaths.h> |
80856e74 | 51 | #include "process.h" |
d177f194 | 52 | #include "syssignal.h" |
a129418f | 53 | #include "systty.h" |
afea8a8a | 54 | #include "syswait.h" |
aba637ec | 55 | #include "blockinput.h" |
f105f403 KL |
56 | #include "frame.h" |
57 | #include "termhooks.h" | |
80856e74 | 58 | |
5f027cea EZ |
59 | #ifdef MSDOS |
60 | #include "msdos.h" | |
61 | #endif | |
62 | ||
d01ba2f1 GM |
63 | #ifdef HAVE_NS |
64 | #include "nsterm.h" | |
65 | #endif | |
66 | ||
f92d51d8 CY |
67 | /* Pattern used by call-process-region to make temp files. */ |
68 | static Lisp_Object Vtemp_file_name_pattern; | |
69 | ||
e0f24100 | 70 | /* True if we are about to fork off a synchronous process or if we |
80856e74 | 71 | are waiting for it. */ |
2f221583 | 72 | bool synch_process_alive; |
80856e74 JB |
73 | |
74 | /* Nonzero => this is a string explaining death of synchronous subprocess. */ | |
42ca4633 | 75 | const char *synch_process_death; |
80856e74 | 76 | |
6b61353c KH |
77 | /* Nonzero => this is the signal number that terminated the subprocess. */ |
78 | int synch_process_termsig; | |
79 | ||
80856e74 JB |
80 | /* If synch_process_death is zero, |
81 | this is exit code of synchronous subprocess. */ | |
82 | int synch_process_retcode; | |
f105f403 | 83 | |
80856e74 | 84 | \f |
37d54121 RS |
85 | /* Clean up when exiting Fcall_process. |
86 | On MSDOS, delete the temporary file on any kind of termination. | |
87 | On Unix, kill the process and any children on termination by signal. */ | |
88 | ||
2f221583 PE |
89 | /* True if this is termination due to exit. */ |
90 | static bool call_process_exited; | |
37d54121 | 91 | |
d177f194 | 92 | static Lisp_Object |
971de7fb | 93 | call_process_kill (Lisp_Object fdpid) |
d177f194 | 94 | { |
d311d28c PE |
95 | int fd; |
96 | pid_t pid; | |
97 | CONS_TO_INTEGER (Fcar (fdpid), int, fd); | |
98 | CONS_TO_INTEGER (Fcdr (fdpid), pid_t, pid); | |
99 | emacs_close (fd); | |
100 | EMACS_KILLPG (pid, SIGKILL); | |
d177f194 JB |
101 | synch_process_alive = 0; |
102 | return Qnil; | |
103 | } | |
104 | ||
7710357c | 105 | static Lisp_Object |
971de7fb | 106 | call_process_cleanup (Lisp_Object arg) |
80856e74 | 107 | { |
ad3aaf33 | 108 | Lisp_Object fdpid = Fcdr (arg); |
d311d28c | 109 | int fd; |
ad3aaf33 AS |
110 | #if defined (MSDOS) |
111 | Lisp_Object file; | |
112 | #else | |
d311d28c | 113 | pid_t pid; |
ad3aaf33 AS |
114 | #endif |
115 | ||
116 | Fset_buffer (Fcar (arg)); | |
d311d28c | 117 | CONS_TO_INTEGER (Fcar (fdpid), int, fd); |
ad3aaf33 | 118 | |
e39a993c | 119 | #if defined (MSDOS) |
7e6c2178 | 120 | /* for MSDOS fdpid is really (fd . tempfile) */ |
c1350752 | 121 | file = Fcdr (fdpid); |
888c9e86 EZ |
122 | /* FD is -1 and FILE is "" when we didn't actually create a |
123 | temporary file in call-process. */ | |
124 | if (fd >= 0) | |
125 | emacs_close (fd); | |
126 | if (!(strcmp (SDATA (file), NULL_DEVICE) == 0 || SREF (file, 0) == '\0')) | |
d5db4077 | 127 | unlink (SDATA (file)); |
e39a993c | 128 | #else /* not MSDOS */ |
d311d28c | 129 | CONS_TO_INTEGER (Fcdr (fdpid), pid_t, pid); |
d177f194 | 130 | |
37d54121 | 131 | if (call_process_exited) |
6b6e798b | 132 | { |
d311d28c | 133 | emacs_close (fd); |
6b6e798b RS |
134 | return Qnil; |
135 | } | |
37d54121 | 136 | |
d177f194 JB |
137 | if (EMACS_KILLPG (pid, SIGINT) == 0) |
138 | { | |
d311d28c | 139 | ptrdiff_t count = SPECPDL_INDEX (); |
d177f194 JB |
140 | record_unwind_protect (call_process_kill, fdpid); |
141 | message1 ("Waiting for process to die...(type C-g again to kill it instantly)"); | |
142 | immediate_quit = 1; | |
143 | QUIT; | |
144 | wait_for_termination (pid); | |
145 | immediate_quit = 0; | |
146 | specpdl_ptr = specpdl + count; /* Discard the unwind protect. */ | |
147 | message1 ("Waiting for process to die...done"); | |
148 | } | |
80856e74 | 149 | synch_process_alive = 0; |
d311d28c | 150 | emacs_close (fd); |
7e6c2178 | 151 | #endif /* not MSDOS */ |
80856e74 JB |
152 | return Qnil; |
153 | } | |
154 | ||
a7ca3326 | 155 | DEFUN ("call-process", Fcall_process, Scall_process, 1, MANY, 0, |
fdb82f93 PJ |
156 | doc: /* Call PROGRAM synchronously in separate process. |
157 | The remaining arguments are optional. | |
158 | The program's input comes from file INFILE (nil means `/dev/null'). | |
1ef14cb4 LMI |
159 | Insert output in BUFFER before point; t means current buffer; nil for BUFFER |
160 | means discard it; 0 means discard and don't wait; and `(:file FILE)', where | |
1b9f60cc GM |
161 | FILE is a file name string, means that it should be written to that file |
162 | \(if the file already exists it is overwritten). | |
fdb82f93 PJ |
163 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
164 | REAL-BUFFER says what to do with standard output, as above, | |
165 | while STDERR-FILE says what to do with standard error in the child. | |
166 | STDERR-FILE may be nil (discard standard error output), | |
167 | t (mix it with ordinary output), or a file name string. | |
168 | ||
169 | Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
170 | Remaining arguments are strings passed as command arguments to PROGRAM. | |
171 | ||
a4feb144 RS |
172 | If executable PROGRAM can't be found as an executable, `call-process' |
173 | signals a Lisp error. `call-process' reports errors in execution of | |
174 | the program only through its return and output. | |
175 | ||
fdb82f93 PJ |
176 | If BUFFER is 0, `call-process' returns immediately with value nil. |
177 | Otherwise it waits for PROGRAM to terminate | |
178 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
179 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
180 | ||
181 | usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */) | |
f66c7cf8 | 182 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 183 | { |
d311d28c | 184 | Lisp_Object infile, buffer, current_dir, path, cleanup_info_tail; |
2f221583 | 185 | bool display_p; |
80856e74 JB |
186 | int fd[2]; |
187 | int filefd; | |
4da256b1 KS |
188 | #define CALLPROC_BUFFER_SIZE_MIN (16 * 1024) |
189 | #define CALLPROC_BUFFER_SIZE_MAX (4 * CALLPROC_BUFFER_SIZE_MIN) | |
190 | char buf[CALLPROC_BUFFER_SIZE_MAX]; | |
191 | int bufsize = CALLPROC_BUFFER_SIZE_MIN; | |
d311d28c PE |
192 | ptrdiff_t count = SPECPDL_INDEX (); |
193 | USE_SAFE_ALLOCA; | |
2d607244 | 194 | |
1aa83b22 | 195 | register const unsigned char **new_argv; |
39eaa782 RS |
196 | /* File to use for stderr in the child. |
197 | t means use same as standard output. */ | |
198 | Lisp_Object error_file; | |
1ef14cb4 | 199 | Lisp_Object output_file = Qnil; |
7e6c2178 | 200 | #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */ |
888c9e86 | 201 | char *outf, *tempfile = NULL; |
7e6c2178 | 202 | int outfilefd; |
d311d28c PE |
203 | int pid; |
204 | #else | |
205 | pid_t pid; | |
80856e74 | 206 | #endif |
1ef14cb4 | 207 | int fd_output = -1; |
32d08644 KH |
208 | struct coding_system process_coding; /* coding-system of process output */ |
209 | struct coding_system argument_coding; /* coding-system of arguments */ | |
09494912 RS |
210 | /* Set to the return value of Ffind_operation_coding_system. */ |
211 | Lisp_Object coding_systems; | |
2f221583 | 212 | bool output_to_buffer = 1; |
09494912 RS |
213 | |
214 | /* Qt denotes that Ffind_operation_coding_system is not yet called. */ | |
215 | coding_systems = Qt; | |
32d08644 | 216 | |
b7826503 | 217 | CHECK_STRING (args[0]); |
80856e74 | 218 | |
39eaa782 RS |
219 | error_file = Qt; |
220 | ||
7e6c2178 RS |
221 | #ifndef subprocesses |
222 | /* Without asynchronous processes we cannot have BUFFER == 0. */ | |
177c0ea7 | 223 | if (nargs >= 3 |
09ffb8b5 | 224 | && (INTEGERP (CONSP (args[2]) ? XCAR (args[2]) : args[2]))) |
7e6c2178 RS |
225 | error ("Operating system cannot handle asynchronous subprocesses"); |
226 | #endif /* subprocesses */ | |
227 | ||
09494912 | 228 | /* Decide the coding-system for giving arguments. */ |
32d08644 KH |
229 | { |
230 | Lisp_Object val, *args2; | |
f66c7cf8 | 231 | ptrdiff_t i; |
32d08644 KH |
232 | |
233 | /* If arguments are supplied, we may have to encode them. */ | |
234 | if (nargs >= 5) | |
235 | { | |
2f221583 | 236 | bool must_encode = 0; |
6e50da0a | 237 | Lisp_Object coding_attrs; |
30d57b8e | 238 | |
e7c1c20e | 239 | for (i = 4; i < nargs; i++) |
b7826503 | 240 | CHECK_STRING (args[i]); |
e7c1c20e | 241 | |
a2286b5c | 242 | for (i = 4; i < nargs; i++) |
30d57b8e RS |
243 | if (STRING_MULTIBYTE (args[i])) |
244 | must_encode = 1; | |
245 | ||
beacaab3 KH |
246 | if (!NILP (Vcoding_system_for_write)) |
247 | val = Vcoding_system_for_write; | |
30d57b8e | 248 | else if (! must_encode) |
fcaf8878 | 249 | val = Qraw_text; |
beacaab3 | 250 | else |
32d08644 | 251 | { |
0065d054 | 252 | SAFE_NALLOCA (args2, 1, nargs + 1); |
32d08644 KH |
253 | args2[0] = Qcall_process; |
254 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
08ee4e87 | 255 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); |
fcaf8878 | 256 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
32d08644 | 257 | } |
fcaf8878 | 258 | val = complement_process_encoding_system (val); |
32d08644 | 259 | setup_coding_system (Fcheck_coding_system (val), &argument_coding); |
6e50da0a KH |
260 | coding_attrs = CODING_ID_ATTRS (argument_coding.id); |
261 | if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs))) | |
262 | { | |
263 | /* We should not use an ASCII incompatible coding system. */ | |
264 | val = raw_text_coding_system (val); | |
265 | setup_coding_system (val, &argument_coding); | |
266 | } | |
32d08644 | 267 | } |
32d08644 KH |
268 | } |
269 | ||
e576cab4 JB |
270 | if (nargs >= 2 && ! NILP (args[1])) |
271 | { | |
4b4deea2 | 272 | infile = Fexpand_file_name (args[1], BVAR (current_buffer, directory)); |
b7826503 | 273 | CHECK_STRING (infile); |
e576cab4 | 274 | } |
80856e74 | 275 | else |
5437e9f9 | 276 | infile = build_string (NULL_DEVICE); |
80856e74 | 277 | |
e576cab4 JB |
278 | if (nargs >= 3) |
279 | { | |
39eaa782 RS |
280 | buffer = args[2]; |
281 | ||
1ef14cb4 LMI |
282 | /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT |
283 | FILE-FOR-STDERR), unless the first element is :file, in which case see | |
284 | the next paragraph. */ | |
19ed11ba AS |
285 | if (CONSP (buffer) |
286 | && (! SYMBOLP (XCAR (buffer)) | |
287 | || strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file"))) | |
39eaa782 | 288 | { |
70949dac | 289 | if (CONSP (XCDR (buffer))) |
45be8a1e | 290 | { |
a9d4f28a | 291 | Lisp_Object stderr_file; |
70949dac | 292 | stderr_file = XCAR (XCDR (buffer)); |
45be8a1e RS |
293 | |
294 | if (NILP (stderr_file) || EQ (Qt, stderr_file)) | |
295 | error_file = stderr_file; | |
296 | else | |
297 | error_file = Fexpand_file_name (stderr_file, Qnil); | |
298 | } | |
299 | ||
70949dac | 300 | buffer = XCAR (buffer); |
39eaa782 | 301 | } |
044512ed | 302 | |
1ef14cb4 | 303 | /* If the buffer is (still) a list, it might be a (:file "file") spec. */ |
19ed11ba AS |
304 | if (CONSP (buffer) |
305 | && SYMBOLP (XCAR (buffer)) | |
306 | && ! strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer))), ":file")) | |
1ef14cb4 LMI |
307 | { |
308 | output_file = Fexpand_file_name (XCAR (XCDR (buffer)), | |
309 | BVAR (current_buffer, directory)); | |
310 | CHECK_STRING (output_file); | |
311 | buffer = Qnil; | |
312 | } | |
313 | ||
39eaa782 RS |
314 | if (!(EQ (buffer, Qnil) |
315 | || EQ (buffer, Qt) | |
3ffde7d6 | 316 | || INTEGERP (buffer))) |
e576cab4 | 317 | { |
39eaa782 RS |
318 | Lisp_Object spec_buffer; |
319 | spec_buffer = buffer; | |
50fe359b | 320 | buffer = Fget_buffer_create (buffer); |
39eaa782 RS |
321 | /* Mention the buffer name for a better error message. */ |
322 | if (NILP (buffer)) | |
b7826503 PJ |
323 | CHECK_BUFFER (spec_buffer); |
324 | CHECK_BUFFER (buffer); | |
e576cab4 JB |
325 | } |
326 | } | |
177c0ea7 | 327 | else |
e576cab4 | 328 | buffer = Qnil; |
80856e74 | 329 | |
58616e67 JB |
330 | /* Make sure that the child will be able to chdir to the current |
331 | buffer's current directory, or its unhandled equivalent. We | |
332 | can't just have the child check for an error when it does the | |
333 | chdir, since it's in a vfork. | |
334 | ||
335 | We have to GCPRO around this because Fexpand_file_name, | |
336 | Funhandled_file_name_directory, and Ffile_accessible_directory_p | |
337 | might call a file name handling function. The argument list is | |
338 | protected by the caller, so all we really have to worry about is | |
339 | buffer. */ | |
340 | { | |
1ef14cb4 | 341 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
58616e67 | 342 | |
4b4deea2 | 343 | current_dir = BVAR (current_buffer, directory); |
58616e67 | 344 | |
1ef14cb4 | 345 | GCPRO5 (infile, buffer, current_dir, error_file, output_file); |
58616e67 | 346 | |
ca319910 SM |
347 | current_dir = Funhandled_file_name_directory (current_dir); |
348 | if (NILP (current_dir)) | |
349 | /* If the file name handler says that current_dir is unreachable, use | |
350 | a sensible default. */ | |
351 | current_dir = build_string ("~/"); | |
352 | current_dir = expand_and_dir_to_file (current_dir, Qnil); | |
db8454b0 CY |
353 | current_dir = Ffile_name_as_directory (current_dir); |
354 | ||
58616e67 JB |
355 | if (NILP (Ffile_accessible_directory_p (current_dir))) |
356 | report_file_error ("Setting current directory", | |
4b4deea2 | 357 | Fcons (BVAR (current_buffer, directory), Qnil)); |
58616e67 | 358 | |
34b87689 KH |
359 | if (STRING_MULTIBYTE (infile)) |
360 | infile = ENCODE_FILE (infile); | |
361 | if (STRING_MULTIBYTE (current_dir)) | |
362 | current_dir = ENCODE_FILE (current_dir); | |
363 | if (STRINGP (error_file) && STRING_MULTIBYTE (error_file)) | |
364 | error_file = ENCODE_FILE (error_file); | |
1ef14cb4 LMI |
365 | if (STRINGP (output_file) && STRING_MULTIBYTE (output_file)) |
366 | output_file = ENCODE_FILE (output_file); | |
58616e67 JB |
367 | UNGCPRO; |
368 | } | |
369 | ||
d311d28c | 370 | display_p = INTERACTIVE && nargs >= 4 && !NILP (args[3]); |
80856e74 | 371 | |
42a5b22f | 372 | filefd = emacs_open (SSDATA (infile), O_RDONLY, 0); |
80856e74 JB |
373 | if (filefd < 0) |
374 | { | |
34b87689 | 375 | infile = DECODE_FILE (infile); |
e576cab4 | 376 | report_file_error ("Opening process input file", Fcons (infile, Qnil)); |
80856e74 | 377 | } |
1ef14cb4 LMI |
378 | |
379 | if (STRINGP (output_file)) | |
380 | { | |
381 | #ifdef DOS_NT | |
382 | fd_output = emacs_open (SSDATA (output_file), | |
383 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, | |
384 | S_IREAD | S_IWRITE); | |
385 | #else /* not DOS_NT */ | |
386 | fd_output = creat (SSDATA (output_file), 0666); | |
387 | #endif /* not DOS_NT */ | |
388 | if (fd_output < 0) | |
389 | { | |
390 | output_file = DECODE_FILE (output_file); | |
391 | report_file_error ("Opening process output file", | |
392 | Fcons (output_file, Qnil)); | |
19ed11ba | 393 | } |
1ef14cb4 | 394 | if (STRINGP (error_file) || NILP (error_file)) |
19ed11ba | 395 | output_to_buffer = 0; |
1ef14cb4 LMI |
396 | } |
397 | ||
80856e74 | 398 | /* Search for program; barf if not found. */ |
c52b0b34 | 399 | { |
ad3aaf33 | 400 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
c52b0b34 | 401 | |
ad3aaf33 | 402 | GCPRO4 (infile, buffer, current_dir, error_file); |
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 | ||
98c6f1e3 | 418 | new_argv = SAFE_ALLOCA ((nargs > 4 ? nargs - 2 : 2) * sizeof *new_argv); |
c364e618 | 419 | |
e7c3fb06 EZ |
420 | { |
421 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; | |
422 | ||
423 | GCPRO5 (infile, buffer, current_dir, path, error_file); | |
424 | if (nargs > 4) | |
425 | { | |
426 | ptrdiff_t i; | |
427 | ||
428 | argument_coding.dst_multibyte = 0; | |
429 | for (i = 4; i < nargs; i++) | |
430 | { | |
431 | argument_coding.src_multibyte = STRING_MULTIBYTE (args[i]); | |
432 | if (CODING_REQUIRE_ENCODING (&argument_coding)) | |
433 | /* We must encode this argument. */ | |
434 | args[i] = encode_coding_string (&argument_coding, args[i], 1); | |
435 | } | |
436 | for (i = 4; i < nargs; i++) | |
437 | new_argv[i - 3] = SDATA (args[i]); | |
438 | new_argv[i - 3] = 0; | |
439 | } | |
440 | else | |
441 | new_argv[1] = 0; | |
442 | if (STRING_MULTIBYTE (path)) | |
443 | path = ENCODE_FILE (path); | |
444 | new_argv[0] = SDATA (path); | |
445 | UNGCPRO; | |
446 | } | |
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; |
80856e74 | 499 | |
1ef14cb4 LMI |
500 | if (fd_output >= 0) |
501 | fd1 = fd_output; | |
80856e74 JB |
502 | |
503 | /* Record that we're about to create a synchronous process. */ | |
504 | synch_process_alive = 1; | |
505 | ||
5c03767e RS |
506 | /* These vars record information from process termination. |
507 | Clear them now before process can possibly terminate, | |
508 | to avoid timing error if process terminates soon. */ | |
509 | synch_process_death = 0; | |
510 | synch_process_retcode = 0; | |
6b61353c | 511 | synch_process_termsig = 0; |
5c03767e | 512 | |
39eaa782 | 513 | if (NILP (error_file)) |
68c45bf0 | 514 | fd_error = emacs_open (NULL_DEVICE, O_WRONLY, 0); |
39eaa782 RS |
515 | else if (STRINGP (error_file)) |
516 | { | |
517 | #ifdef DOS_NT | |
42a5b22f | 518 | fd_error = emacs_open (SSDATA (error_file), |
68c45bf0 PE |
519 | O_WRONLY | O_TRUNC | O_CREAT | O_TEXT, |
520 | S_IREAD | S_IWRITE); | |
39eaa782 | 521 | #else /* not DOS_NT */ |
42a5b22f | 522 | fd_error = creat (SSDATA (error_file), 0666); |
39eaa782 RS |
523 | #endif /* not DOS_NT */ |
524 | } | |
525 | ||
526 | if (fd_error < 0) | |
527 | { | |
68c45bf0 | 528 | emacs_close (filefd); |
6f89d28a | 529 | if (fd[0] != filefd) |
68c45bf0 | 530 | emacs_close (fd[0]); |
39eaa782 | 531 | if (fd1 >= 0) |
68c45bf0 | 532 | emacs_close (fd1); |
6f89d28a MB |
533 | #ifdef MSDOS |
534 | unlink (tempfile); | |
535 | #endif | |
34b87689 KH |
536 | if (NILP (error_file)) |
537 | error_file = build_string (NULL_DEVICE); | |
538 | else if (STRINGP (error_file)) | |
539 | error_file = DECODE_FILE (error_file); | |
540 | report_file_error ("Cannot redirect stderr", Fcons (error_file, Qnil)); | |
39eaa782 | 541 | } |
89e1ec1d | 542 | |
2610078a | 543 | #ifdef MSDOS /* MW, July 1993 */ |
c17c4250 | 544 | /* Note that on MSDOS `child_setup' actually returns the child process |
2610078a KH |
545 | exit status, not its PID, so we assign it to `synch_process_retcode' |
546 | below. */ | |
c17c4250 EZ |
547 | pid = child_setup (filefd, outfilefd, fd_error, (char **) new_argv, |
548 | 0, current_dir); | |
39eaa782 | 549 | |
2610078a KH |
550 | /* Record that the synchronous process exited and note its |
551 | termination status. */ | |
552 | synch_process_alive = 0; | |
553 | synch_process_retcode = pid; | |
554 | if (synch_process_retcode < 0) /* means it couldn't be exec'ed */ | |
68c45bf0 | 555 | { |
ca9c0567 | 556 | synchronize_system_messages_locale (); |
68c45bf0 PE |
557 | synch_process_death = strerror (errno); |
558 | } | |
2610078a | 559 | |
68c45bf0 | 560 | emacs_close (outfilefd); |
2610078a | 561 | if (fd_error != outfilefd) |
68c45bf0 | 562 | emacs_close (fd_error); |
2610078a | 563 | fd1 = -1; /* No harm in closing that one! */ |
888c9e86 | 564 | if (tempfile) |
2610078a | 565 | { |
888c9e86 EZ |
566 | /* Since CRLF is converted to LF within `decode_coding', we |
567 | can always open a file with binary mode. */ | |
568 | fd[0] = emacs_open (tempfile, O_RDONLY | O_BINARY, 0); | |
569 | if (fd[0] < 0) | |
570 | { | |
571 | unlink (tempfile); | |
572 | emacs_close (filefd); | |
573 | report_file_error ("Cannot re-open temporary file", | |
7285dc67 | 574 | Fcons (build_string (tempfile), Qnil)); |
888c9e86 | 575 | } |
2610078a | 576 | } |
888c9e86 EZ |
577 | else |
578 | fd[0] = -1; /* We are not going to read from tempfile. */ | |
2610078a | 579 | #else /* not MSDOS */ |
bad95d8f | 580 | #ifdef WINDOWSNT |
2d607244 RS |
581 | pid = child_setup (filefd, fd1, fd_error, (char **) new_argv, |
582 | 0, current_dir); | |
bad95d8f | 583 | #else /* not WINDOWSNT */ |
c0ad4ea5 | 584 | |
4d7e6e51 | 585 | block_input (); |
aba637ec | 586 | |
db6c0e74 | 587 | /* vfork, and prevent local vars from being clobbered by the vfork. */ |
b08a63cc | 588 | { |
c74e9d86 PE |
589 | Lisp_Object volatile buffer_volatile = buffer; |
590 | Lisp_Object volatile coding_systems_volatile = coding_systems; | |
591 | Lisp_Object volatile current_dir_volatile = current_dir; | |
2f221583 PE |
592 | bool volatile display_p_volatile = display_p; |
593 | bool volatile output_to_buffer_volatile = output_to_buffer; | |
594 | bool volatile sa_must_free_volatile = sa_must_free; | |
5266b4bb | 595 | int volatile fd1_volatile = fd1; |
db6c0e74 PE |
596 | int volatile fd_error_volatile = fd_error; |
597 | int volatile fd_output_volatile = fd_output; | |
d311d28c | 598 | ptrdiff_t volatile sa_count_volatile = sa_count; |
db6c0e74 | 599 | unsigned char const **volatile new_argv_volatile = new_argv; |
80856e74 | 600 | |
db6c0e74 | 601 | pid = vfork (); |
80856e74 | 602 | |
c74e9d86 PE |
603 | buffer = buffer_volatile; |
604 | coding_systems = coding_systems_volatile; | |
605 | current_dir = current_dir_volatile; | |
d311d28c | 606 | display_p = display_p_volatile; |
5266b4bb | 607 | fd1 = fd1_volatile; |
db6c0e74 PE |
608 | fd_error = fd_error_volatile; |
609 | fd_output = fd_output_volatile; | |
610 | output_to_buffer = output_to_buffer_volatile; | |
12b3abd5 | 611 | sa_must_free = sa_must_free_volatile; |
d311d28c | 612 | sa_count = sa_count_volatile; |
db6c0e74 PE |
613 | new_argv = new_argv_volatile; |
614 | } | |
b9c7f648 | 615 | |
80856e74 JB |
616 | if (pid == 0) |
617 | { | |
618 | if (fd[0] >= 0) | |
68c45bf0 | 619 | emacs_close (fd[0]); |
322aea6d | 620 | |
1e7963c7 | 621 | #ifdef HAVE_SETSID |
19ed11ba | 622 | setsid (); |
80856e74 | 623 | #else |
322aea6d PE |
624 | setpgid (0, 0); |
625 | #endif | |
c0ad4ea5 | 626 | |
4d7e6e51 | 627 | /* Emacs ignores SIGPIPE, but the child should not. */ |
2f9b9adb | 628 | signal (SIGPIPE, SIG_DFL); |
c0ad4ea5 | 629 | |
2d607244 RS |
630 | child_setup (filefd, fd1, fd_error, (char **) new_argv, |
631 | 0, current_dir); | |
80856e74 | 632 | } |
aba637ec | 633 | |
4d7e6e51 | 634 | unblock_input (); |
c0ad4ea5 | 635 | |
bad95d8f | 636 | #endif /* not WINDOWSNT */ |
cd5f8f60 RS |
637 | |
638 | /* The MSDOS case did this already. */ | |
639 | if (fd_error >= 0) | |
68c45bf0 | 640 | emacs_close (fd_error); |
2610078a | 641 | #endif /* not MSDOS */ |
80856e74 | 642 | |
80856e74 JB |
643 | environ = save_environ; |
644 | ||
6b6e798b RS |
645 | /* Close most of our fd's, but not fd[0] |
646 | since we will use that to read input from. */ | |
68c45bf0 | 647 | emacs_close (filefd); |
1ef14cb4 LMI |
648 | if (fd_output >= 0) |
649 | emacs_close (fd_output); | |
799abb26 | 650 | if (fd1 >= 0 && fd1 != fd_error) |
68c45bf0 | 651 | emacs_close (fd1); |
80856e74 JB |
652 | } |
653 | ||
654 | if (pid < 0) | |
655 | { | |
6b6e798b | 656 | if (fd[0] >= 0) |
68c45bf0 | 657 | emacs_close (fd[0]); |
80856e74 JB |
658 | report_file_error ("Doing vfork", Qnil); |
659 | } | |
660 | ||
d50d3dc8 | 661 | if (INTEGERP (buffer)) |
80856e74 | 662 | { |
6b6e798b | 663 | if (fd[0] >= 0) |
68c45bf0 | 664 | emacs_close (fd[0]); |
80856e74 JB |
665 | return Qnil; |
666 | } | |
667 | ||
6b6e798b | 668 | /* Enable sending signal if user quits below. */ |
37d54121 RS |
669 | call_process_exited = 0; |
670 | ||
5e617bc2 | 671 | #if defined (MSDOS) |
7e6c2178 | 672 | /* MSDOS needs different cleanup information. */ |
d311d28c | 673 | cleanup_info_tail = build_string (tempfile ? tempfile : ""); |
7e6c2178 | 674 | #else |
d311d28c PE |
675 | cleanup_info_tail = INTEGER_TO_CONS (pid); |
676 | #endif /* not MSDOS */ | |
80856e74 | 677 | record_unwind_protect (call_process_cleanup, |
ad3aaf33 | 678 | Fcons (Fcurrent_buffer (), |
d311d28c PE |
679 | Fcons (INTEGER_TO_CONS (fd[0]), |
680 | cleanup_info_tail))); | |
80856e74 | 681 | |
d50d3dc8 | 682 | if (BUFFERP (buffer)) |
80856e74 JB |
683 | Fset_buffer (buffer); |
684 | ||
09494912 RS |
685 | if (NILP (buffer)) |
686 | { | |
687 | /* If BUFFER is nil, we must read process output once and then | |
688 | discard it, so setup coding system but with nil. */ | |
689 | setup_coding_system (Qnil, &process_coding); | |
659afede | 690 | process_coding.dst_multibyte = 0; |
09494912 RS |
691 | } |
692 | else | |
693 | { | |
694 | Lisp_Object val, *args2; | |
695 | ||
696 | val = Qnil; | |
697 | if (!NILP (Vcoding_system_for_read)) | |
698 | val = Vcoding_system_for_read; | |
699 | else | |
700 | { | |
701 | if (EQ (coding_systems, Qt)) | |
702 | { | |
f66c7cf8 | 703 | ptrdiff_t i; |
09494912 | 704 | |
0065d054 | 705 | SAFE_NALLOCA (args2, 1, nargs + 1); |
09494912 RS |
706 | args2[0] = Qcall_process; |
707 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
708 | coding_systems | |
709 | = Ffind_operation_coding_system (nargs + 1, args2); | |
710 | } | |
711 | if (CONSP (coding_systems)) | |
70949dac | 712 | val = XCAR (coding_systems); |
09494912 | 713 | else if (CONSP (Vdefault_process_coding_system)) |
70949dac | 714 | val = XCAR (Vdefault_process_coding_system); |
09494912 RS |
715 | else |
716 | val = Qnil; | |
717 | } | |
91183bfd | 718 | Fcheck_coding_system (val); |
09494912 RS |
719 | /* In unibyte mode, character code conversion should not take |
720 | place but EOL conversion should. So, setup raw-text or one | |
721 | of the subsidiary according to the information just setup. */ | |
4b4deea2 | 722 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) |
09494912 | 723 | && !NILP (val)) |
91183bfd KH |
724 | val = raw_text_coding_system (val); |
725 | setup_coding_system (val, &process_coding); | |
659afede KH |
726 | process_coding.dst_multibyte |
727 | = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); | |
09494912 | 728 | } |
a0241d01 | 729 | process_coding.src_multibyte = 0; |
09494912 | 730 | |
80856e74 JB |
731 | immediate_quit = 1; |
732 | QUIT; | |
733 | ||
1ef14cb4 | 734 | if (output_to_buffer) |
19ed11ba | 735 | { |
2f221583 PE |
736 | int nread; |
737 | bool first = 1; | |
19ed11ba AS |
738 | EMACS_INT total_read = 0; |
739 | int carryover = 0; | |
2f221583 | 740 | bool display_on_the_fly = display_p; |
19ed11ba AS |
741 | struct coding_system saved_coding; |
742 | ||
743 | saved_coding = process_coding; | |
744 | while (1) | |
745 | { | |
746 | /* Repeatedly read until we've filled as much as possible | |
747 | of the buffer size we have. But don't read | |
748 | less than 1024--save that for the next bufferful. */ | |
749 | nread = carryover; | |
750 | while (nread < bufsize - 1024) | |
751 | { | |
752 | int this_read = emacs_read (fd[0], buf + nread, | |
753 | bufsize - nread); | |
60558b19 | 754 | |
19ed11ba AS |
755 | if (this_read < 0) |
756 | goto give_up; | |
60558b19 | 757 | |
19ed11ba AS |
758 | if (this_read == 0) |
759 | { | |
760 | process_coding.mode |= CODING_MODE_LAST_BLOCK; | |
761 | break; | |
762 | } | |
60558b19 | 763 | |
19ed11ba AS |
764 | nread += this_read; |
765 | total_read += this_read; | |
60558b19 | 766 | |
19ed11ba AS |
767 | if (display_on_the_fly) |
768 | break; | |
769 | } | |
60558b19 | 770 | |
19ed11ba AS |
771 | /* Now NREAD is the total amount of data in the buffer. */ |
772 | immediate_quit = 0; | |
177c0ea7 | 773 | |
19ed11ba AS |
774 | if (!NILP (buffer)) |
775 | { | |
776 | if (NILP (BVAR (current_buffer, enable_multibyte_characters)) | |
777 | && ! CODING_MAY_REQUIRE_DECODING (&process_coding)) | |
778 | insert_1_both (buf, nread, nread, 0, 1, 0); | |
779 | else | |
780 | { /* We have to decode the input. */ | |
781 | Lisp_Object curbuf; | |
d311d28c | 782 | ptrdiff_t count1 = SPECPDL_INDEX (); |
19ed11ba AS |
783 | |
784 | XSETBUFFER (curbuf, current_buffer); | |
785 | /* We cannot allow after-change-functions be run | |
786 | during decoding, because that might modify the | |
787 | buffer, while we rely on process_coding.produced to | |
788 | faithfully reflect inserted text until we | |
789 | TEMP_SET_PT_BOTH below. */ | |
790 | specbind (Qinhibit_modification_hooks, Qt); | |
791 | decode_coding_c_string (&process_coding, | |
792 | (unsigned char *) buf, nread, curbuf); | |
793 | unbind_to (count1, Qnil); | |
794 | if (display_on_the_fly | |
795 | && CODING_REQUIRE_DETECTION (&saved_coding) | |
796 | && ! CODING_REQUIRE_DETECTION (&process_coding)) | |
797 | { | |
798 | /* We have detected some coding system. But, | |
799 | there's a possibility that the detection was | |
800 | done by insufficient data. So, we give up | |
801 | displaying on the fly. */ | |
802 | if (process_coding.produced > 0) | |
803 | del_range_2 (process_coding.dst_pos, | |
804 | process_coding.dst_pos_byte, | |
805 | process_coding.dst_pos | |
806 | + process_coding.produced_char, | |
807 | process_coding.dst_pos_byte | |
808 | + process_coding.produced, 0); | |
809 | display_on_the_fly = 0; | |
810 | process_coding = saved_coding; | |
811 | carryover = nread; | |
812 | /* This is to make the above condition always | |
813 | fails in the future. */ | |
814 | saved_coding.common_flags | |
815 | &= ~CODING_REQUIRE_DETECTION_MASK; | |
816 | continue; | |
817 | } | |
818 | ||
819 | TEMP_SET_PT_BOTH (PT + process_coding.produced_char, | |
820 | PT_BYTE + process_coding.produced); | |
821 | carryover = process_coding.carryover_bytes; | |
822 | if (carryover > 0) | |
823 | memcpy (buf, process_coding.carryover, | |
824 | process_coding.carryover_bytes); | |
825 | } | |
826 | } | |
c5bfa12b | 827 | |
19ed11ba AS |
828 | if (process_coding.mode & CODING_MODE_LAST_BLOCK) |
829 | break; | |
6e3bfbb2 | 830 | |
19ed11ba AS |
831 | /* Make the buffer bigger as we continue to read more data, |
832 | but not past CALLPROC_BUFFER_SIZE_MAX. */ | |
833 | if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) | |
834 | if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) | |
835 | bufsize = CALLPROC_BUFFER_SIZE_MAX; | |
6e3bfbb2 | 836 | |
19ed11ba AS |
837 | if (display_p) |
838 | { | |
839 | if (first) | |
840 | prepare_menu_bars (); | |
841 | first = 0; | |
842 | redisplay_preserve_echo_area (1); | |
843 | /* This variable might have been set to 0 for code | |
844 | detection. In that case, we set it back to 1 because | |
845 | we should have already detected a coding system. */ | |
846 | display_on_the_fly = 1; | |
847 | } | |
848 | immediate_quit = 1; | |
849 | QUIT; | |
850 | } | |
851 | give_up: ; | |
852 | ||
853 | Vlast_coding_system_used = CODING_ID_NAME (process_coding.id); | |
854 | /* If the caller required, let the buffer inherit the | |
855 | coding-system used to decode the process output. */ | |
856 | if (inherit_process_coding_system) | |
857 | call1 (intern ("after-insert-file-set-buffer-file-coding-system"), | |
858 | make_number (total_read)); | |
859 | } | |
3b440bb5 | 860 | |
77defa9a | 861 | #ifndef MSDOS |
80856e74 | 862 | /* Wait for it to terminate, unless it already has. */ |
1ef14cb4 LMI |
863 | if (output_to_buffer) |
864 | wait_for_termination (pid); | |
865 | else | |
866 | interruptible_wait_for_termination (pid); | |
77defa9a | 867 | #endif |
80856e74 JB |
868 | |
869 | immediate_quit = 0; | |
870 | ||
37d54121 RS |
871 | /* Don't kill any children that the subprocess may have left behind |
872 | when exiting. */ | |
873 | call_process_exited = 1; | |
874 | ||
3c59b4c9 | 875 | SAFE_FREE (); |
80856e74 JB |
876 | unbind_to (count, Qnil); |
877 | ||
6b61353c KH |
878 | if (synch_process_termsig) |
879 | { | |
42ca4633 | 880 | const char *signame; |
6b61353c KH |
881 | |
882 | synchronize_system_messages_locale (); | |
883 | signame = strsignal (synch_process_termsig); | |
884 | ||
885 | if (signame == 0) | |
19ed11ba | 886 | signame = "unknown"; |
6b61353c KH |
887 | |
888 | synch_process_death = signame; | |
889 | } | |
890 | ||
80856e74 | 891 | if (synch_process_death) |
68c45bf0 PE |
892 | return code_convert_string_norecord (build_string (synch_process_death), |
893 | Vlocale_coding_system, 0); | |
80856e74 JB |
894 | return make_number (synch_process_retcode); |
895 | } | |
80856e74 | 896 | \f |
9fefd2ba | 897 | static Lisp_Object |
971de7fb | 898 | delete_temp_file (Lisp_Object name) |
80856e74 | 899 | { |
1a271e14 | 900 | /* Suppress jka-compr handling, etc. */ |
d311d28c | 901 | ptrdiff_t count = SPECPDL_INDEX (); |
1a271e14 | 902 | specbind (intern ("file-name-handler-alist"), Qnil); |
f1a5d776 | 903 | internal_delete_file (name); |
1a271e14 | 904 | unbind_to (count, Qnil); |
320695d8 | 905 | return Qnil; |
80856e74 JB |
906 | } |
907 | ||
908 | DEFUN ("call-process-region", Fcall_process_region, Scall_process_region, | |
fdb82f93 PJ |
909 | 3, MANY, 0, |
910 | doc: /* Send text from START to END to a synchronous process running PROGRAM. | |
911 | The remaining arguments are optional. | |
912 | Delete the text if fourth arg DELETE is non-nil. | |
913 | ||
1ef14cb4 LMI |
914 | Insert output in BUFFER before point; t means current buffer; nil for |
915 | BUFFER means discard it; 0 means discard and don't wait; and `(:file | |
916 | FILE)', where FILE is a file name string, means that it should be | |
1b9f60cc | 917 | written to that file (if the file already exists it is overwritten). |
fdb82f93 PJ |
918 | BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case, |
919 | REAL-BUFFER says what to do with standard output, as above, | |
920 | while STDERR-FILE says what to do with standard error in the child. | |
921 | STDERR-FILE may be nil (discard standard error output), | |
922 | t (mix it with ordinary output), or a file name string. | |
923 | ||
924 | Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted. | |
925 | Remaining args are passed to PROGRAM at startup as command args. | |
926 | ||
ba9a5174 | 927 | If BUFFER is 0, `call-process-region' returns immediately with value nil. |
fdb82f93 PJ |
928 | Otherwise it waits for PROGRAM to terminate |
929 | and returns a numeric exit status or a signal description string. | |
d98b59b5 MB |
930 | If you quit, the process is killed with SIGINT, or SIGKILL if you quit again. |
931 | ||
932 | usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */) | |
f66c7cf8 | 933 | (ptrdiff_t nargs, Lisp_Object *args) |
80856e74 | 934 | { |
39323a7e KH |
935 | struct gcpro gcpro1; |
936 | Lisp_Object filename_string; | |
937 | register Lisp_Object start, end; | |
d311d28c | 938 | ptrdiff_t count = SPECPDL_INDEX (); |
08ee4e87 | 939 | /* Qt denotes we have not yet called Ffind_operation_coding_system. */ |
09494912 | 940 | Lisp_Object coding_systems; |
32d08644 | 941 | Lisp_Object val, *args2; |
f66c7cf8 | 942 | ptrdiff_t i; |
98c6f1e3 | 943 | Lisp_Object tmpdir; |
7e6c2178 | 944 | |
f92d51d8 CY |
945 | if (STRINGP (Vtemporary_file_directory)) |
946 | tmpdir = Vtemporary_file_directory; | |
7e6c2178 RS |
947 | else |
948 | { | |
f92d51d8 CY |
949 | #ifndef DOS_NT |
950 | if (getenv ("TMPDIR")) | |
951 | tmpdir = build_string (getenv ("TMPDIR")); | |
952 | else | |
953 | tmpdir = build_string ("/tmp/"); | |
954 | #else /* DOS_NT */ | |
955 | char *outf; | |
956 | if ((outf = egetenv ("TMPDIR")) | |
957 | || (outf = egetenv ("TMP")) | |
958 | || (outf = egetenv ("TEMP"))) | |
959 | tmpdir = build_string (outf); | |
960 | else | |
961 | tmpdir = Ffile_name_as_directory (build_string ("c:/temp")); | |
0774fcf8 | 962 | #endif |
f92d51d8 | 963 | } |
7e6c2178 | 964 | |
3c59b4c9 PE |
965 | { |
966 | USE_SAFE_ALLOCA; | |
98c6f1e3 | 967 | Lisp_Object pattern = Fexpand_file_name (Vtemp_file_name_pattern, tmpdir); |
7c2fcf9b EZ |
968 | Lisp_Object encoded_tem = ENCODE_FILE (pattern); |
969 | char *tempfile = SAFE_ALLOCA (SBYTES (encoded_tem) + 1); | |
970 | memcpy (tempfile, SDATA (encoded_tem), SBYTES (encoded_tem) + 1); | |
3c59b4c9 | 971 | coding_systems = Qt; |
09494912 | 972 | |
1ddc85a4 | 973 | #ifdef HAVE_MKSTEMP |
3c59b4c9 PE |
974 | { |
975 | int fd; | |
976 | ||
4d7e6e51 | 977 | block_input (); |
3c59b4c9 | 978 | fd = mkstemp (tempfile); |
4d7e6e51 | 979 | unblock_input (); |
3c59b4c9 PE |
980 | if (fd == -1) |
981 | report_file_error ("Failed to open temporary file", | |
baac5bc7 | 982 | Fcons (build_string (tempfile), Qnil)); |
3c59b4c9 PE |
983 | else |
984 | close (fd); | |
985 | } | |
1ddc85a4 | 986 | #else |
d3cefd13 | 987 | errno = 0; |
3c59b4c9 | 988 | mktemp (tempfile); |
d3cefd13 EZ |
989 | if (!*tempfile) |
990 | { | |
991 | if (!errno) | |
992 | errno = EEXIST; | |
993 | report_file_error ("Failed to open temporary file using pattern", | |
994 | Fcons (pattern, Qnil)); | |
995 | } | |
1ddc85a4 | 996 | #endif |
80856e74 | 997 | |
3c59b4c9 PE |
998 | filename_string = build_string (tempfile); |
999 | GCPRO1 (filename_string); | |
1000 | SAFE_FREE (); | |
1001 | } | |
1002 | ||
80856e74 JB |
1003 | start = args[0]; |
1004 | end = args[1]; | |
32d08644 | 1005 | /* Decide coding-system of the contents of the temporary file. */ |
91489411 RS |
1006 | if (!NILP (Vcoding_system_for_write)) |
1007 | val = Vcoding_system_for_write; | |
4b4deea2 | 1008 | else if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
fcaf8878 | 1009 | val = Qraw_text; |
32d08644 | 1010 | else |
beacaab3 | 1011 | { |
3c59b4c9 | 1012 | USE_SAFE_ALLOCA; |
0065d054 | 1013 | SAFE_NALLOCA (args2, 1, nargs + 1); |
91489411 RS |
1014 | args2[0] = Qcall_process_region; |
1015 | for (i = 0; i < nargs; i++) args2[i + 1] = args[i]; | |
1016 | coding_systems = Ffind_operation_coding_system (nargs + 1, args2); | |
fcaf8878 | 1017 | val = CONSP (coding_systems) ? XCDR (coding_systems) : Qnil; |
3c59b4c9 | 1018 | SAFE_FREE (); |
beacaab3 | 1019 | } |
fcaf8878 | 1020 | val = complement_process_encoding_system (val); |
32d08644 | 1021 | |
168afdaa | 1022 | { |
d311d28c | 1023 | ptrdiff_t count1 = SPECPDL_INDEX (); |
168afdaa RS |
1024 | |
1025 | specbind (intern ("coding-system-for-write"), val); | |
bb951f0e KR |
1026 | /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we |
1027 | happen to get a ".Z" suffix. */ | |
1028 | specbind (intern ("file-name-handler-alist"), Qnil); | |
168afdaa RS |
1029 | Fwrite_region (start, end, filename_string, Qnil, Qlambda, Qnil, Qnil); |
1030 | ||
1031 | unbind_to (count1, Qnil); | |
1032 | } | |
91489411 | 1033 | |
177c0ea7 | 1034 | /* Note that Fcall_process takes care of binding |
91489411 | 1035 | coding-system-for-read. */ |
093650fe | 1036 | |
80856e74 JB |
1037 | record_unwind_protect (delete_temp_file, filename_string); |
1038 | ||
edf496dd | 1039 | if (nargs > 3 && !NILP (args[3])) |
80856e74 JB |
1040 | Fdelete_region (start, end); |
1041 | ||
edf496dd KH |
1042 | if (nargs > 3) |
1043 | { | |
1044 | args += 2; | |
1045 | nargs -= 2; | |
1046 | } | |
1047 | else | |
1048 | { | |
1049 | args[0] = args[2]; | |
1050 | nargs = 2; | |
1051 | } | |
1052 | args[1] = filename_string; | |
80856e74 | 1053 | |
edf496dd | 1054 | RETURN_UNGCPRO (unbind_to (count, Fcall_process (nargs, args))); |
80856e74 JB |
1055 | } |
1056 | \f | |
361358ea | 1057 | #ifndef WINDOWSNT |
971de7fb | 1058 | static int relocate_fd (int fd, int minfd); |
361358ea | 1059 | #endif |
dfcf069d | 1060 | |
5990851d KL |
1061 | static char ** |
1062 | add_env (char **env, char **new_env, char *string) | |
1063 | { | |
1064 | char **ep; | |
2f221583 | 1065 | bool ok = 1; |
5990851d KL |
1066 | if (string == NULL) |
1067 | return new_env; | |
1068 | ||
1069 | /* See if this string duplicates any string already in the env. | |
1070 | If so, don't put it in. | |
1071 | When an env var has multiple definitions, | |
1072 | we keep the definition that comes first in process-environment. */ | |
1073 | for (ep = env; ok && ep != new_env; ep++) | |
1074 | { | |
1075 | char *p = *ep, *q = string; | |
1076 | while (ok) | |
19ed11ba AS |
1077 | { |
1078 | if (*q != *p) | |
1079 | break; | |
1080 | if (*q == 0) | |
1081 | /* The string is a lone variable name; keep it for now, we | |
1082 | will remove it later. It is a placeholder for a | |
1083 | variable that is not to be included in the environment. */ | |
1084 | break; | |
1085 | if (*q == '=') | |
1086 | ok = 0; | |
1087 | p++, q++; | |
1088 | } | |
5990851d KL |
1089 | } |
1090 | if (ok) | |
1091 | *new_env++ = string; | |
1092 | return new_env; | |
1093 | } | |
1094 | ||
80856e74 JB |
1095 | /* This is the last thing run in a newly forked inferior |
1096 | either synchronous or asynchronous. | |
1097 | Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2. | |
1098 | Initialize inferior's priority, pgrp, connected dir and environment. | |
1099 | then exec another program based on new_argv. | |
1100 | ||
1101 | This function may change environ for the superior process. | |
1102 | Therefore, the superior process must save and restore the value | |
1103 | of environ around the vfork and the call to this function. | |
1104 | ||
2f221583 | 1105 | If SET_PGRP, put the subprocess into a separate process group. |
e576cab4 JB |
1106 | |
1107 | CURRENT_DIR is an elisp string giving the path of the current | |
1108 | directory the subprocess should have. Since we can't really signal | |
1109 | a decent error from within the child, this should be verified as an | |
1110 | executable directory by the parent. */ | |
80856e74 | 1111 | |
dfcf069d | 1112 | int |
2f221583 PE |
1113 | child_setup (int in, int out, int err, char **new_argv, bool set_pgrp, |
1114 | Lisp_Object current_dir) | |
80856e74 | 1115 | { |
e576cab4 | 1116 | char **env; |
7fcf7f05 | 1117 | char *pwd_var; |
bad95d8f RS |
1118 | #ifdef WINDOWSNT |
1119 | int cpid; | |
4252a4bd | 1120 | HANDLE handles[3]; |
bad95d8f | 1121 | #endif /* WINDOWSNT */ |
e576cab4 | 1122 | |
d311d28c | 1123 | pid_t pid = getpid (); |
80856e74 | 1124 | |
80856e74 JB |
1125 | /* Close Emacs's descriptors that this process should not have. */ |
1126 | close_process_descs (); | |
ded80a25 | 1127 | |
c17c4250 EZ |
1128 | /* DOS_NT isn't in a vfork, so if we are in the middle of load-file, |
1129 | we will lose if we call close_load_descs here. */ | |
1130 | #ifndef DOS_NT | |
4458cebe | 1131 | close_load_descs (); |
c17c4250 | 1132 | #endif |
80856e74 JB |
1133 | |
1134 | /* Note that use of alloca is always safe here. It's obvious for systems | |
1135 | that do not have true vfork or that have true (stack) alloca. | |
caa01fe0 GM |
1136 | If using vfork and C_ALLOCA (when Emacs used to include |
1137 | src/alloca.c) it is safe because that changes the superior's | |
1138 | static variables as if the superior had done alloca and will be | |
1139 | cleaned up in the usual way. */ | |
e576cab4 | 1140 | { |
7fcf7f05 | 1141 | register char *temp; |
0065d054 | 1142 | size_t i; /* size_t, because ptrdiff_t might overflow here! */ |
77d78be1 | 1143 | |
d5db4077 | 1144 | i = SBYTES (current_dir); |
16425c4a EZ |
1145 | #ifdef MSDOS |
1146 | /* MSDOS must have all environment variables malloc'ed, because | |
1147 | low-level libc functions that launch subsidiary processes rely | |
1148 | on that. */ | |
23f86fce | 1149 | pwd_var = xmalloc (i + 6); |
16425c4a | 1150 | #else |
38182d90 | 1151 | pwd_var = alloca (i + 6); |
16425c4a | 1152 | #endif |
7fcf7f05 | 1153 | temp = pwd_var + 4; |
72af86bd AS |
1154 | memcpy (pwd_var, "PWD=", 4); |
1155 | memcpy (temp, SDATA (current_dir), i); | |
bad95d8f | 1156 | if (!IS_DIRECTORY_SEP (temp[i - 1])) temp[i++] = DIRECTORY_SEP; |
e576cab4 JB |
1157 | temp[i] = 0; |
1158 | ||
c17c4250 | 1159 | #ifndef DOS_NT |
e576cab4 JB |
1160 | /* We can't signal an Elisp error here; we're in a vfork. Since |
1161 | the callers check the current directory before forking, this | |
1162 | should only return an error if the directory's permissions | |
1163 | are changed between the check and this chdir, but we should | |
1164 | at least check. */ | |
1165 | if (chdir (temp) < 0) | |
20b25e46 | 1166 | _exit (errno); |
f8d23104 | 1167 | #else /* DOS_NT */ |
c17c4250 EZ |
1168 | /* Get past the drive letter, so that d:/ is left alone. */ |
1169 | if (i > 2 && IS_DEVICE_SEP (temp[1]) && IS_DIRECTORY_SEP (temp[2])) | |
1170 | { | |
1171 | temp += 2; | |
1172 | i -= 2; | |
1173 | } | |
f8d23104 | 1174 | #endif /* DOS_NT */ |
c17c4250 | 1175 | |
7fcf7f05 | 1176 | /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */ |
bad95d8f | 1177 | while (i > 2 && IS_DIRECTORY_SEP (temp[i - 1])) |
7fcf7f05 | 1178 | temp[--i] = 0; |
e576cab4 | 1179 | } |
80856e74 | 1180 | |
5990851d | 1181 | /* Set `env' to a vector of the strings in the environment. */ |
80856e74 JB |
1182 | { |
1183 | register Lisp_Object tem; | |
1184 | register char **new_env; | |
5990851d | 1185 | char **p, **q; |
80856e74 | 1186 | register int new_length; |
d2bb6598 | 1187 | Lisp_Object display = Qnil; |
361358ea | 1188 | |
80856e74 | 1189 | new_length = 0; |
f105f403 | 1190 | |
80856e74 | 1191 | for (tem = Vprocess_environment; |
19ed11ba AS |
1192 | CONSP (tem) && STRINGP (XCAR (tem)); |
1193 | tem = XCDR (tem)) | |
d2bb6598 | 1194 | { |
42a5b22f | 1195 | if (strncmp (SSDATA (XCAR (tem)), "DISPLAY", 7) == 0 |
d2bb6598 SM |
1196 | && (SDATA (XCAR (tem)) [7] == '\0' |
1197 | || SDATA (XCAR (tem)) [7] == '=')) | |
1198 | /* DISPLAY is specified in process-environment. */ | |
1199 | display = Qt; | |
1200 | new_length++; | |
1201 | } | |
de87fb59 | 1202 | |
d2bb6598 SM |
1203 | /* If not provided yet, use the frame's DISPLAY. */ |
1204 | if (NILP (display)) | |
1205 | { | |
1206 | Lisp_Object tmp = Fframe_parameter (selected_frame, Qdisplay); | |
1207 | if (!STRINGP (tmp) && CONSP (Vinitial_environment)) | |
1208 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ | |
1209 | tmp = Fgetenv_internal (build_string ("DISPLAY"), | |
1210 | Vinitial_environment); | |
1211 | if (STRINGP (tmp)) | |
1212 | { | |
1213 | display = tmp; | |
1214 | new_length++; | |
1215 | } | |
1216 | } | |
80856e74 | 1217 | |
7fcf7f05 | 1218 | /* new_length + 2 to include PWD and terminating 0. */ |
38182d90 | 1219 | env = new_env = alloca ((new_length + 2) * sizeof *env); |
7fcf7f05 RS |
1220 | /* If we have a PWD envvar, pass one down, |
1221 | but with corrected value. */ | |
a13f8f50 | 1222 | if (egetenv ("PWD")) |
7fcf7f05 | 1223 | *new_env++ = pwd_var; |
361358ea | 1224 | |
6b8e474c | 1225 | if (STRINGP (display)) |
de87fb59 | 1226 | { |
38182d90 | 1227 | char *vdata = alloca (sizeof "DISPLAY=" + SBYTES (display)); |
de87fb59 | 1228 | strcpy (vdata, "DISPLAY="); |
42a5b22f | 1229 | strcat (vdata, SSDATA (display)); |
de87fb59 DN |
1230 | new_env = add_env (env, new_env, vdata); |
1231 | } | |
80856e74 | 1232 | |
5990851d | 1233 | /* Overrides. */ |
80856e74 | 1234 | for (tem = Vprocess_environment; |
70949dac KR |
1235 | CONSP (tem) && STRINGP (XCAR (tem)); |
1236 | tem = XCDR (tem)) | |
42a5b22f | 1237 | new_env = add_env (env, new_env, SSDATA (XCAR (tem))); |
d2bb6598 | 1238 | |
5990851d KL |
1239 | *new_env = 0; |
1240 | ||
1241 | /* Remove variable names without values. */ | |
1242 | p = q = env; | |
1243 | while (*p != 0) | |
cd9565ba | 1244 | { |
19ed11ba AS |
1245 | while (*q != 0 && strchr (*q, '=') == NULL) |
1246 | q++; | |
1247 | *p = *q++; | |
1248 | if (*p != 0) | |
1249 | p++; | |
cd9565ba | 1250 | } |
80856e74 | 1251 | } |
de87fb59 | 1252 | |
361358ea | 1253 | |
bad95d8f RS |
1254 | #ifdef WINDOWSNT |
1255 | prepare_standard_handles (in, out, err, handles); | |
d5db4077 | 1256 | set_process_dir (SDATA (current_dir)); |
67802943 DN |
1257 | /* Spawn the child. (See ntproc.c:Spawnve). */ |
1258 | cpid = spawnve (_P_NOWAIT, new_argv[0], new_argv, env); | |
1259 | reset_standard_handles (in, out, err, handles); | |
1260 | if (cpid == -1) | |
1261 | /* An error occurred while trying to spawn the process. */ | |
1262 | report_file_error ("Spawning child process", Qnil); | |
1263 | return cpid; | |
1264 | ||
bad95d8f | 1265 | #else /* not WINDOWSNT */ |
426b37ae JB |
1266 | /* Make sure that in, out, and err are not actually already in |
1267 | descriptors zero, one, or two; this could happen if Emacs is | |
7e6c2178 | 1268 | started with its standard in, out, or error closed, as might |
426b37ae | 1269 | happen under X. */ |
f29f9e4a RS |
1270 | { |
1271 | int oin = in, oout = out; | |
1272 | ||
1273 | /* We have to avoid relocating the same descriptor twice! */ | |
1274 | ||
1275 | in = relocate_fd (in, 3); | |
1276 | ||
1277 | if (out == oin) | |
1278 | out = in; | |
1279 | else | |
3e9367e7 | 1280 | out = relocate_fd (out, 3); |
f29f9e4a RS |
1281 | |
1282 | if (err == oin) | |
1283 | err = in; | |
1284 | else if (err == oout) | |
1285 | err = out; | |
1286 | else | |
3e9367e7 | 1287 | err = relocate_fd (err, 3); |
f29f9e4a | 1288 | } |
426b37ae | 1289 | |
c17c4250 | 1290 | #ifndef MSDOS |
68c45bf0 PE |
1291 | emacs_close (0); |
1292 | emacs_close (1); | |
1293 | emacs_close (2); | |
80856e74 JB |
1294 | |
1295 | dup2 (in, 0); | |
1296 | dup2 (out, 1); | |
1297 | dup2 (err, 2); | |
68c45bf0 | 1298 | emacs_close (in); |
ce8f5a9a AS |
1299 | if (out != in) |
1300 | emacs_close (out); | |
1301 | if (err != in && err != out) | |
1302 | emacs_close (err); | |
80856e74 | 1303 | |
322aea6d PE |
1304 | #if defined HAVE_SETPGID || ! (defined USG && defined SETPGRP_RELEASES_CTTY) |
1305 | setpgid (pid, pid); | |
fdba8590 | 1306 | #endif |
80856e74 | 1307 | |
a7ebc409 | 1308 | /* setpgrp_of_tty is incorrect here; it uses input_fd. */ |
12e610e8 | 1309 | tcsetpgrp (0, pid); |
a7ebc409 | 1310 | |
80856e74 JB |
1311 | /* execvp does not accept an environment arg so the only way |
1312 | to pass this environment is to set environ. Our caller | |
1313 | is responsible for restoring the ambient value of environ. */ | |
1314 | environ = env; | |
1315 | execvp (new_argv[0], new_argv); | |
1316 | ||
68c45bf0 PE |
1317 | emacs_write (1, "Can't exec program: ", 20); |
1318 | emacs_write (1, new_argv[0], strlen (new_argv[0])); | |
1319 | emacs_write (1, "\n", 1); | |
80856e74 | 1320 | _exit (1); |
67802943 DN |
1321 | |
1322 | #else /* MSDOS */ | |
1323 | pid = run_msdos_command (new_argv, pwd_var + 4, in, out, err, env); | |
1324 | xfree (pwd_var); | |
1325 | if (pid == -1) | |
1326 | /* An error occurred while trying to run the subprocess. */ | |
1327 | report_file_error ("Spawning child process", Qnil); | |
1328 | return pid; | |
1329 | #endif /* MSDOS */ | |
ae76d9e1 | 1330 | #endif /* not WINDOWSNT */ |
80856e74 JB |
1331 | } |
1332 | ||
361358ea | 1333 | #ifndef WINDOWSNT |
a3833dfe | 1334 | /* Move the file descriptor FD so that its number is not less than MINFD. |
426b37ae | 1335 | If the file descriptor is moved at all, the original is freed. */ |
dfcf069d | 1336 | static int |
971de7fb | 1337 | relocate_fd (int fd, int minfd) |
426b37ae | 1338 | { |
a3833dfe | 1339 | if (fd >= minfd) |
426b37ae JB |
1340 | return fd; |
1341 | else | |
1342 | { | |
cf237e27 AS |
1343 | int new; |
1344 | #ifdef F_DUPFD | |
1345 | new = fcntl (fd, F_DUPFD, minfd); | |
1346 | #else | |
1347 | new = dup (fd); | |
1348 | if (new != -1) | |
1349 | /* Note that we hold the original FD open while we recurse, | |
1350 | to guarantee we'll get a new FD if we need it. */ | |
1351 | new = relocate_fd (new, minfd); | |
1352 | #endif | |
426b37ae JB |
1353 | if (new == -1) |
1354 | { | |
cb1d0ef7 | 1355 | const char *message_1 = "Error while setting up child: "; |
a8fe7202 | 1356 | const char *errmessage = strerror (errno); |
cb1d0ef7 PE |
1357 | const char *message_2 = "\n"; |
1358 | emacs_write (2, message_1, strlen (message_1)); | |
68c45bf0 | 1359 | emacs_write (2, errmessage, strlen (errmessage)); |
cb1d0ef7 | 1360 | emacs_write (2, message_2, strlen (message_2)); |
426b37ae JB |
1361 | _exit (1); |
1362 | } | |
68c45bf0 | 1363 | emacs_close (fd); |
426b37ae JB |
1364 | return new; |
1365 | } | |
1366 | } | |
361358ea | 1367 | #endif /* not WINDOWSNT */ |
426b37ae | 1368 | |
2f221583 | 1369 | static bool |
989f33ba PE |
1370 | getenv_internal_1 (const char *var, ptrdiff_t varlen, char **value, |
1371 | ptrdiff_t *valuelen, Lisp_Object env) | |
012c6fcb | 1372 | { |
db699fc6 | 1373 | for (; CONSP (env); env = XCDR (env)) |
012c6fcb | 1374 | { |
db699fc6 | 1375 | Lisp_Object entry = XCAR (env); |
d50d3dc8 | 1376 | if (STRINGP (entry) |
db699fc6 | 1377 | && SBYTES (entry) >= varlen |
bad95d8f RS |
1378 | #ifdef WINDOWSNT |
1379 | /* NT environment variables are case insensitive. */ | |
d5db4077 | 1380 | && ! strnicmp (SDATA (entry), var, varlen) |
bad95d8f | 1381 | #else /* not WINDOWSNT */ |
72af86bd | 1382 | && ! memcmp (SDATA (entry), var, varlen) |
bad95d8f | 1383 | #endif /* not WINDOWSNT */ |
a9971c6d | 1384 | ) |
012c6fcb | 1385 | { |
db699fc6 SM |
1386 | if (SBYTES (entry) > varlen && SREF (entry, varlen) == '=') |
1387 | { | |
51b59d79 | 1388 | *value = SSDATA (entry) + (varlen + 1); |
db699fc6 SM |
1389 | *valuelen = SBYTES (entry) - (varlen + 1); |
1390 | return 1; | |
1391 | } | |
1392 | else if (SBYTES (entry) == varlen) | |
1393 | { | |
1394 | /* Lone variable names in Vprocess_environment mean that | |
1395 | variable should be removed from the environment. */ | |
1396 | *value = NULL; | |
1397 | return 1; | |
1398 | } | |
1399 | } | |
1400 | } | |
1401 | return 0; | |
1402 | } | |
1403 | ||
2f221583 | 1404 | static bool |
989f33ba PE |
1405 | getenv_internal (const char *var, ptrdiff_t varlen, char **value, |
1406 | ptrdiff_t *valuelen, Lisp_Object frame) | |
012c6fcb | 1407 | { |
d2bb6598 SM |
1408 | /* Try to find VAR in Vprocess_environment first. */ |
1409 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1410 | Vprocess_environment)) | |
1411 | return *value ? 1 : 0; | |
f105f403 | 1412 | |
d2bb6598 | 1413 | /* For DISPLAY try to get the values from the frame or the initial env. */ |
de87fb59 | 1414 | if (strcmp (var, "DISPLAY") == 0) |
d2bb6598 SM |
1415 | { |
1416 | Lisp_Object display | |
1417 | = Fframe_parameter (NILP (frame) ? selected_frame : frame, Qdisplay); | |
1418 | if (STRINGP (display)) | |
1419 | { | |
51b59d79 | 1420 | *value = SSDATA (display); |
de87fb59 | 1421 | *valuelen = SBYTES (display); |
012c6fcb JA |
1422 | return 1; |
1423 | } | |
d2bb6598 SM |
1424 | /* If still not found, Look for DISPLAY in Vinitial_environment. */ |
1425 | if (getenv_internal_1 (var, varlen, value, valuelen, | |
1426 | Vinitial_environment)) | |
1427 | return *value ? 1 : 0; | |
012c6fcb JA |
1428 | } |
1429 | ||
1430 | return 0; | |
1431 | } | |
1432 | ||
f105f403 | 1433 | DEFUN ("getenv-internal", Fgetenv_internal, Sgetenv_internal, 1, 2, 0, |
5990851d KL |
1434 | doc: /* Get the value of environment variable VARIABLE. |
1435 | VARIABLE should be a string. Value is nil if VARIABLE is undefined in | |
1436 | the environment. Otherwise, value is a string. | |
f105f403 | 1437 | |
acf20901 | 1438 | This function searches `process-environment' for VARIABLE. |
5990851d | 1439 | |
db699fc6 | 1440 | If optional parameter ENV is a list, then search this list instead of |
acf20901 JB |
1441 | `process-environment', and return t when encountering a negative entry |
1442 | \(an entry for a variable with no value). */) | |
5842a27b | 1443 | (Lisp_Object variable, Lisp_Object env) |
012c6fcb JA |
1444 | { |
1445 | char *value; | |
989f33ba | 1446 | ptrdiff_t valuelen; |
012c6fcb | 1447 | |
5990851d | 1448 | CHECK_STRING (variable); |
db699fc6 SM |
1449 | if (CONSP (env)) |
1450 | { | |
42a5b22f | 1451 | if (getenv_internal_1 (SSDATA (variable), SBYTES (variable), |
db699fc6 SM |
1452 | &value, &valuelen, env)) |
1453 | return value ? make_string (value, valuelen) : Qt; | |
1454 | else | |
1455 | return Qnil; | |
1456 | } | |
42a5b22f | 1457 | else if (getenv_internal (SSDATA (variable), SBYTES (variable), |
d2bb6598 | 1458 | &value, &valuelen, env)) |
012c6fcb JA |
1459 | return make_string (value, valuelen); |
1460 | else | |
1461 | return Qnil; | |
1462 | } | |
1463 | ||
5990851d KL |
1464 | /* A version of getenv that consults the Lisp environment lists, |
1465 | easily callable from C. */ | |
012c6fcb | 1466 | char * |
a8fe7202 | 1467 | egetenv (const char *var) |
012c6fcb JA |
1468 | { |
1469 | char *value; | |
25c7e41f | 1470 | ptrdiff_t valuelen; |
012c6fcb | 1471 | |
f105f403 | 1472 | if (getenv_internal (var, strlen (var), &value, &valuelen, Qnil)) |
012c6fcb JA |
1473 | return value; |
1474 | else | |
1475 | return 0; | |
1476 | } | |
1477 | ||
80856e74 | 1478 | \f |
8de15d69 | 1479 | /* This is run before init_cmdargs. */ |
177c0ea7 | 1480 | |
dfcf069d | 1481 | void |
971de7fb | 1482 | init_callproc_1 (void) |
8de15d69 | 1483 | { |
d01ba2f1 GM |
1484 | #ifdef HAVE_NS |
1485 | const char *etc_dir = ns_etc_directory (); | |
cbb31951 | 1486 | const char *path_exec = ns_exec_path (); |
d01ba2f1 | 1487 | #endif |
35a2f4b8 | 1488 | |
76151e2c | 1489 | Vdata_directory = decode_env_path ("EMACSDATA", |
d01ba2f1 | 1490 | #ifdef HAVE_NS |
76151e2c | 1491 | etc_dir ? etc_dir : |
d01ba2f1 | 1492 | #endif |
76151e2c EZ |
1493 | PATH_DATA); |
1494 | Vdata_directory = Ffile_name_as_directory (Fcar (Vdata_directory)); | |
1495 | ||
1496 | Vdoc_directory = decode_env_path ("EMACSDOC", | |
d01ba2f1 | 1497 | #ifdef HAVE_NS |
76151e2c | 1498 | etc_dir ? etc_dir : |
d01ba2f1 | 1499 | #endif |
76151e2c EZ |
1500 | PATH_DOC); |
1501 | Vdoc_directory = Ffile_name_as_directory (Fcar (Vdoc_directory)); | |
9453ea7b | 1502 | |
e576cab4 | 1503 | /* Check the EMACSPATH environment variable, defaulting to the |
57bda87a | 1504 | PATH_EXEC path from epaths.h. */ |
cbb31951 GM |
1505 | Vexec_path = decode_env_path ("EMACSPATH", |
1506 | #ifdef HAVE_NS | |
1507 | path_exec ? path_exec : | |
1508 | #endif | |
1509 | PATH_EXEC); | |
80856e74 | 1510 | Vexec_directory = Ffile_name_as_directory (Fcar (Vexec_path)); |
cbb31951 | 1511 | /* FIXME? For ns, path_exec should go at the front? */ |
80856e74 | 1512 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); |
8de15d69 RS |
1513 | } |
1514 | ||
e17f7533 | 1515 | /* This is run after init_cmdargs, when Vinstallation_directory is valid. */ |
8de15d69 | 1516 | |
dfcf069d | 1517 | void |
971de7fb | 1518 | init_callproc (void) |
8de15d69 RS |
1519 | { |
1520 | char *data_dir = egetenv ("EMACSDATA"); | |
177c0ea7 | 1521 | |
8de15d69 RS |
1522 | register char * sh; |
1523 | Lisp_Object tempdir; | |
d01ba2f1 GM |
1524 | #ifdef HAVE_NS |
1525 | if (data_dir == 0) | |
1526 | { | |
1527 | const char *etc_dir = ns_etc_directory (); | |
1528 | if (etc_dir) | |
1529 | { | |
1530 | data_dir = alloca (strlen (etc_dir) + 1); | |
1531 | strcpy (data_dir, etc_dir); | |
1532 | } | |
1533 | } | |
1534 | #endif | |
8de15d69 | 1535 | |
9cc4fad5 | 1536 | if (!NILP (Vinstallation_directory)) |
8de15d69 | 1537 | { |
05630743 RS |
1538 | /* Add to the path the lib-src subdir of the installation dir. */ |
1539 | Lisp_Object tem; | |
1540 | tem = Fexpand_file_name (build_string ("lib-src"), | |
1541 | Vinstallation_directory); | |
76151e2c | 1542 | #ifndef MSDOS |
1a6640ec | 1543 | /* MSDOS uses wrapped binaries, so don't do this. */ |
0fa248bc | 1544 | if (NILP (Fmember (tem, Vexec_path))) |
70ec1377 | 1545 | { |
cbb31951 GM |
1546 | #ifdef HAVE_NS |
1547 | const char *path_exec = ns_exec_path (); | |
1548 | #endif | |
1549 | Vexec_path = decode_env_path ("EMACSPATH", | |
1550 | #ifdef HAVE_NS | |
1551 | path_exec ? path_exec : | |
1552 | #endif | |
1553 | PATH_EXEC); | |
70ec1377 RS |
1554 | Vexec_path = Fcons (tem, Vexec_path); |
1555 | Vexec_path = nconc2 (decode_env_path ("PATH", ""), Vexec_path); | |
1556 | } | |
177c0ea7 | 1557 | |
0fa248bc | 1558 | Vexec_directory = Ffile_name_as_directory (tem); |
76151e2c | 1559 | #endif /* not MSDOS */ |
8de15d69 | 1560 | |
e17f7533 RS |
1561 | /* Maybe use ../etc as well as ../lib-src. */ |
1562 | if (data_dir == 0) | |
1563 | { | |
1564 | tem = Fexpand_file_name (build_string ("etc"), | |
1565 | Vinstallation_directory); | |
1566 | Vdoc_directory = Ffile_name_as_directory (tem); | |
8de15d69 RS |
1567 | } |
1568 | } | |
7e933683 RS |
1569 | |
1570 | /* Look for the files that should be in etc. We don't use | |
1571 | Vinstallation_directory, because these files are never installed | |
e17f7533 | 1572 | near the executable, and they are never in the build |
7e933683 RS |
1573 | directory when that's different from the source directory. |
1574 | ||
1575 | Instead, if these files are not in the nominal place, we try the | |
1576 | source directory. */ | |
1577 | if (data_dir == 0) | |
1578 | { | |
70ec1377 | 1579 | Lisp_Object tem, tem1, srcdir; |
7e933683 | 1580 | |
70ec1377 RS |
1581 | srcdir = Fexpand_file_name (build_string ("../src/"), |
1582 | build_string (PATH_DUMPLOADSEARCH)); | |
7e933683 RS |
1583 | tem = Fexpand_file_name (build_string ("GNU"), Vdata_directory); |
1584 | tem1 = Ffile_exists_p (tem); | |
70ec1377 | 1585 | if (!NILP (Fequal (srcdir, Vinvocation_directory)) || NILP (tem1)) |
7e933683 | 1586 | { |
70ec1377 | 1587 | Lisp_Object newdir; |
7e933683 RS |
1588 | newdir = Fexpand_file_name (build_string ("../etc/"), |
1589 | build_string (PATH_DUMPLOADSEARCH)); | |
1590 | tem = Fexpand_file_name (build_string ("GNU"), newdir); | |
1591 | tem1 = Ffile_exists_p (tem); | |
1592 | if (!NILP (tem1)) | |
1593 | Vdata_directory = newdir; | |
1594 | } | |
1595 | } | |
80856e74 | 1596 | |
d883eb62 RS |
1597 | #ifndef CANNOT_DUMP |
1598 | if (initialized) | |
1599 | #endif | |
1600 | { | |
1601 | tempdir = Fdirectory_file_name (Vexec_directory); | |
42a5b22f | 1602 | if (access (SSDATA (tempdir), 0) < 0) |
d883eb62 RS |
1603 | dir_warning ("Warning: arch-dependent data dir (%s) does not exist.\n", |
1604 | Vexec_directory); | |
1605 | } | |
80856e74 | 1606 | |
e576cab4 | 1607 | tempdir = Fdirectory_file_name (Vdata_directory); |
42a5b22f | 1608 | if (access (SSDATA (tempdir), 0) < 0) |
76d5c6cf RS |
1609 | dir_warning ("Warning: arch-independent data dir (%s) does not exist.\n", |
1610 | Vdata_directory); | |
e576cab4 | 1611 | |
e576cab4 | 1612 | sh = (char *) getenv ("SHELL"); |
80856e74 | 1613 | Vshell_file_name = build_string (sh ? sh : "/bin/sh"); |
8abd035b | 1614 | |
40b49d4b JB |
1615 | #ifdef DOS_NT |
1616 | Vshared_game_score_directory = Qnil; | |
1617 | #else | |
63789758 RS |
1618 | Vshared_game_score_directory = build_string (PATH_GAME); |
1619 | if (NILP (Ffile_directory_p (Vshared_game_score_directory))) | |
1620 | Vshared_game_score_directory = Qnil; | |
40b49d4b | 1621 | #endif |
9fefd2ba JB |
1622 | } |
1623 | ||
dfcf069d | 1624 | void |
971de7fb | 1625 | set_initial_environment (void) |
9fefd2ba | 1626 | { |
738db178 DN |
1627 | char **envp; |
1628 | for (envp = environ; *envp; envp++) | |
1629 | Vprocess_environment = Fcons (build_string (*envp), | |
1630 | Vprocess_environment); | |
1631 | /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent | |
1632 | to use `delete' and friends on process-environment. */ | |
1633 | Vinitial_environment = Fcopy_sequence (Vprocess_environment); | |
80856e74 JB |
1634 | } |
1635 | ||
dfcf069d | 1636 | void |
971de7fb | 1637 | syms_of_callproc (void) |
80856e74 | 1638 | { |
f92d51d8 CY |
1639 | #ifndef DOS_NT |
1640 | Vtemp_file_name_pattern = build_string ("emacsXXXXXX"); | |
1641 | #elif defined (WINDOWSNT) | |
1642 | Vtemp_file_name_pattern = build_string ("emXXXXXX"); | |
1643 | #else | |
1644 | Vtemp_file_name_pattern = build_string ("detmp.XXX"); | |
1645 | #endif | |
1646 | staticpro (&Vtemp_file_name_pattern); | |
1647 | ||
29208e82 | 1648 | DEFVAR_LISP ("shell-file-name", Vshell_file_name, |
fb7ada5f | 1649 | doc: /* File name to load inferior shells from. |
b20b29be EZ |
1650 | Initialized from the SHELL environment variable, or to a system-dependent |
1651 | default if SHELL is not set. */); | |
80856e74 | 1652 | |
29208e82 | 1653 | DEFVAR_LISP ("exec-path", Vexec_path, |
fb7ada5f | 1654 | doc: /* List of directories to search programs to run in subprocesses. |
fdb82f93 | 1655 | Each element is a string (directory name) or nil (try default directory). */); |
80856e74 | 1656 | |
29208e82 | 1657 | DEFVAR_LISP ("exec-suffixes", Vexec_suffixes, |
fb7ada5f | 1658 | doc: /* List of suffixes to try to find executable file names. |
fdb82f93 | 1659 | Each element is a string. */); |
33d5af99 | 1660 | Vexec_suffixes = Qnil; |
b81a1b72 | 1661 | |
29208e82 | 1662 | DEFVAR_LISP ("exec-directory", Vexec_directory, |
fdb82f93 PJ |
1663 | doc: /* Directory for executables for Emacs to invoke. |
1664 | More generally, this includes any architecture-dependent files | |
1665 | that are built and installed from the Emacs distribution. */); | |
e576cab4 | 1666 | |
29208e82 | 1667 | DEFVAR_LISP ("data-directory", Vdata_directory, |
fdb82f93 PJ |
1668 | doc: /* Directory of machine-independent files that come with GNU Emacs. |
1669 | These are files intended for Emacs to use while it runs. */); | |
80856e74 | 1670 | |
29208e82 | 1671 | DEFVAR_LISP ("doc-directory", Vdoc_directory, |
fdb82f93 | 1672 | doc: /* Directory containing the DOC file that comes with GNU Emacs. |
ebf24b59 | 1673 | This is usually the same as `data-directory'. */); |
35a2f4b8 | 1674 | |
29208e82 | 1675 | DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory, |
fdb82f93 PJ |
1676 | doc: /* For internal use by the build procedure only. |
1677 | This is the name of the directory in which the build procedure installed | |
ebf24b59 | 1678 | Emacs's info files; the default value for `Info-default-directory-list' |
fdb82f93 | 1679 | includes this. */); |
ed61592a JB |
1680 | Vconfigure_info_directory = build_string (PATH_INFO); |
1681 | ||
29208e82 | 1682 | DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory, |
b065672a CW |
1683 | doc: /* Directory of score files for games which come with GNU Emacs. |
1684 | If this variable is nil, then Emacs is unable to use a shared directory. */); | |
40b49d4b JB |
1685 | #ifdef DOS_NT |
1686 | Vshared_game_score_directory = Qnil; | |
1687 | #else | |
63789758 | 1688 | Vshared_game_score_directory = build_string (PATH_GAME); |
40b49d4b | 1689 | #endif |
b065672a | 1690 | |
29208e82 | 1691 | DEFVAR_LISP ("initial-environment", Vinitial_environment, |
6b8e474c SM |
1692 | doc: /* List of environment variables inherited from the parent process. |
1693 | Each element should be a string of the form ENVVARNAME=VALUE. | |
1694 | The elements must normally be decoded (using `locale-coding-system') for use. */); | |
1695 | Vinitial_environment = Qnil; | |
1696 | ||
29208e82 | 1697 | DEFVAR_LISP ("process-environment", Vprocess_environment, |
5990851d | 1698 | doc: /* List of overridden environment variables for subprocesses to inherit. |
fdb82f93 | 1699 | Each element should be a string of the form ENVVARNAME=VALUE. |
5990851d | 1700 | |
a13f8f50 KL |
1701 | Entries in this list take precedence to those in the frame-local |
1702 | environments. Therefore, let-binding `process-environment' is an easy | |
1703 | way to temporarily change the value of an environment variable, | |
1704 | irrespective of where it comes from. To use `process-environment' to | |
1705 | remove an environment variable, include only its name in the list, | |
1706 | without "=VALUE". | |
5990851d KL |
1707 | |
1708 | This variable is set to nil when Emacs starts. | |
1709 | ||
fdb82f93 PJ |
1710 | If multiple entries define the same variable, the first one always |
1711 | takes precedence. | |
5990851d | 1712 | |
776a24a1 | 1713 | Non-ASCII characters are encoded according to the initial value of |
5990851d KL |
1714 | `locale-coding-system', i.e. the elements must normally be decoded for |
1715 | use. | |
1716 | ||
776a24a1 | 1717 | See `setenv' and `getenv'. */); |
86f5ca04 | 1718 | Vprocess_environment = Qnil; |
80856e74 | 1719 | |
80856e74 | 1720 | defsubr (&Scall_process); |
83fa009c | 1721 | defsubr (&Sgetenv_internal); |
e576cab4 | 1722 | defsubr (&Scall_process_region); |
80856e74 | 1723 | } |