1 /* Synchronous subprocess invocation for GNU Emacs.
2 Copyright (C) 1985-1988, 1993-1995, 1999-2013
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
36 #define _P_NOWAIT 1 /* from process.h */
39 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
41 #include <sys/param.h>
45 #include "character.h"
49 #include "composite.h"
52 #include "syssignal.h"
55 #include "blockinput.h"
57 #include "termhooks.h"
67 /* Pattern used by call-process-region to make temp files. */
68 static Lisp_Object Vtemp_file_name_pattern
;
70 /* The next two variables are valid only while record-unwind-protect
71 is in place during call-process for a synchronous subprocess. At
72 other times, their contents are irrelevant. Doing this via static
73 C variables is more convenient than putting them into the arguments
74 of record-unwind-protect, as they need to be updated at randomish
75 times in the code, and Lisp cannot always store these values as
76 Emacs integers. It's safe to use static variables here, as the
77 code is never invoked reentrantly. */
79 /* If nonzero, a process-ID that has not been reaped. */
80 static pid_t synch_process_pid
;
82 /* If nonnegative, a file descriptor that has not been closed. */
83 static int synch_process_fd
;
88 block_child_signal (void)
91 sigemptyset (&blocked
);
92 sigaddset (&blocked
, SIGCHLD
);
93 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
96 /* Unblock SIGCHLD. */
99 unblock_child_signal (void)
101 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
104 /* If P is reapable, record it as a deleted process and kill it.
105 Do this in a critical section. Unless PID is wedged it will be
106 reaped on receipt of the first SIGCHLD after the critical section. */
109 record_kill_process (struct Lisp_Process
*p
)
111 block_child_signal ();
116 record_deleted_pid (p
->pid
);
117 kill (- p
->pid
, SIGKILL
);
120 unblock_child_signal ();
123 /* Clean up when exiting call_process_cleanup. */
126 call_process_kill (Lisp_Object ignored
)
128 if (synch_process_fd
>= 0)
129 emacs_close (synch_process_fd
);
131 if (synch_process_pid
)
133 struct Lisp_Process proc
;
135 proc
.pid
= synch_process_pid
;
136 record_kill_process (&proc
);
142 /* Clean up when exiting Fcall_process.
143 On MSDOS, delete the temporary file on any kind of termination.
144 On Unix, kill the process and any children on termination by signal. */
147 call_process_cleanup (Lisp_Object arg
)
150 Lisp_Object buffer
= Fcar (arg
);
151 Lisp_Object file
= Fcdr (arg
);
153 Lisp_Object buffer
= arg
;
156 Fset_buffer (buffer
);
159 /* If the process still exists, kill its process group. */
160 if (synch_process_pid
)
162 ptrdiff_t count
= SPECPDL_INDEX ();
163 kill (-synch_process_pid
, SIGINT
);
164 record_unwind_protect (call_process_kill
, make_number (0));
165 message1 ("Waiting for process to die...(type C-g again to kill it instantly)");
168 wait_for_termination (synch_process_pid
, 0, 1);
169 synch_process_pid
= 0;
171 specpdl_ptr
= specpdl
+ count
; /* Discard the unwind protect. */
172 message1 ("Waiting for process to die...done");
176 if (synch_process_fd
>= 0)
177 emacs_close (synch_process_fd
);
180 /* FILE is "" when we didn't actually create a temporary file in
182 if (!(strcmp (SDATA (file
), NULL_DEVICE
) == 0 || SREF (file
, 0) == '\0'))
183 unlink (SDATA (file
));
190 static mode_t
const default_output_mode
= S_IREAD
| S_IWRITE
;
192 static mode_t
const default_output_mode
= 0666;
195 DEFUN ("call-process", Fcall_process
, Scall_process
, 1, MANY
, 0,
196 doc
: /* Call PROGRAM synchronously in separate process.
197 The remaining arguments are optional.
198 The program's input comes from file INFILE (nil means `/dev/null').
199 Insert output in DESTINATION before point; t means current buffer; nil for DESTINATION
200 means discard it; 0 means discard and don't wait; and `(:file FILE)', where
201 FILE is a file name string, means that it should be written to that file
202 \(if the file already exists it is overwritten).
203 DESTINATION 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.
209 Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.
210 Remaining arguments are strings passed as command arguments to PROGRAM.
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.
216 If DESTINATION 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.
219 If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
221 usage: (call-process PROGRAM &optional INFILE DESTINATION DISPLAY &rest ARGS) */)
222 (ptrdiff_t nargs
, Lisp_Object
*args
)
224 Lisp_Object infile
, buffer
, current_dir
, path
;
226 int fd0
, fd1
, filefd
;
228 ptrdiff_t count
= SPECPDL_INDEX ();
232 /* File to use for stderr in the child.
233 t means use same as standard output. */
234 Lisp_Object error_file
;
235 Lisp_Object output_file
= Qnil
;
236 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
237 char *outf
, *tempfile
= NULL
;
245 struct coding_system process_coding
; /* coding-system of process output */
246 struct coding_system argument_coding
; /* coding-system of arguments */
247 /* Set to the return value of Ffind_operation_coding_system. */
248 Lisp_Object coding_systems
;
249 bool output_to_buffer
= 1;
251 /* Qt denotes that Ffind_operation_coding_system is not yet called. */
254 CHECK_STRING (args
[0]);
259 /* Without asynchronous processes we cannot have BUFFER == 0. */
261 && (INTEGERP (CONSP (args
[2]) ? XCAR (args
[2]) : args
[2])))
262 error ("Operating system cannot handle asynchronous subprocesses");
263 #endif /* subprocesses */
265 /* Decide the coding-system for giving arguments. */
267 Lisp_Object val
, *args2
;
270 /* If arguments are supplied, we may have to encode them. */
273 bool must_encode
= 0;
274 Lisp_Object coding_attrs
;
276 for (i
= 4; i
< nargs
; i
++)
277 CHECK_STRING (args
[i
]);
279 for (i
= 4; i
< nargs
; i
++)
280 if (STRING_MULTIBYTE (args
[i
]))
283 if (!NILP (Vcoding_system_for_write
))
284 val
= Vcoding_system_for_write
;
285 else if (! must_encode
)
289 SAFE_NALLOCA (args2
, 1, nargs
+ 1);
290 args2
[0] = Qcall_process
;
291 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
292 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
293 val
= CONSP (coding_systems
) ? XCDR (coding_systems
) : Qnil
;
295 val
= complement_process_encoding_system (val
);
296 setup_coding_system (Fcheck_coding_system (val
), &argument_coding
);
297 coding_attrs
= CODING_ID_ATTRS (argument_coding
.id
);
298 if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs
)))
300 /* We should not use an ASCII incompatible coding system. */
301 val
= raw_text_coding_system (val
);
302 setup_coding_system (val
, &argument_coding
);
307 if (nargs
>= 2 && ! NILP (args
[1]))
309 infile
= Fexpand_file_name (args
[1], BVAR (current_buffer
, directory
));
310 CHECK_STRING (infile
);
313 infile
= build_string (NULL_DEVICE
);
319 /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT
320 FILE-FOR-STDERR), unless the first element is :file, in which case see
321 the next paragraph. */
323 && (! SYMBOLP (XCAR (buffer
))
324 || strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer
))), ":file")))
326 if (CONSP (XCDR (buffer
)))
328 Lisp_Object stderr_file
;
329 stderr_file
= XCAR (XCDR (buffer
));
331 if (NILP (stderr_file
) || EQ (Qt
, stderr_file
))
332 error_file
= stderr_file
;
334 error_file
= Fexpand_file_name (stderr_file
, Qnil
);
337 buffer
= XCAR (buffer
);
340 /* If the buffer is (still) a list, it might be a (:file "file") spec. */
342 && SYMBOLP (XCAR (buffer
))
343 && ! strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer
))), ":file"))
345 output_file
= Fexpand_file_name (XCAR (XCDR (buffer
)),
346 BVAR (current_buffer
, directory
));
347 CHECK_STRING (output_file
);
351 if (!(EQ (buffer
, Qnil
)
353 || INTEGERP (buffer
)))
355 Lisp_Object spec_buffer
;
356 spec_buffer
= buffer
;
357 buffer
= Fget_buffer_create (buffer
);
358 /* Mention the buffer name for a better error message. */
360 CHECK_BUFFER (spec_buffer
);
361 CHECK_BUFFER (buffer
);
367 /* Make sure that the child will be able to chdir to the current
368 buffer's current directory, or its unhandled equivalent. We
369 can't just have the child check for an error when it does the
370 chdir, since it's in a vfork.
372 We have to GCPRO around this because Fexpand_file_name,
373 Funhandled_file_name_directory, and Ffile_accessible_directory_p
374 might call a file name handling function. The argument list is
375 protected by the caller, so all we really have to worry about is
378 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
380 current_dir
= BVAR (current_buffer
, directory
);
382 GCPRO5 (infile
, buffer
, current_dir
, error_file
, output_file
);
384 current_dir
= Funhandled_file_name_directory (current_dir
);
385 if (NILP (current_dir
))
386 /* If the file name handler says that current_dir is unreachable, use
387 a sensible default. */
388 current_dir
= build_string ("~/");
389 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
390 current_dir
= Ffile_name_as_directory (current_dir
);
392 if (NILP (Ffile_accessible_directory_p (current_dir
)))
393 report_file_error ("Setting current directory",
394 Fcons (BVAR (current_buffer
, directory
), Qnil
));
396 if (STRING_MULTIBYTE (infile
))
397 infile
= ENCODE_FILE (infile
);
398 if (STRING_MULTIBYTE (current_dir
))
399 current_dir
= ENCODE_FILE (current_dir
);
400 if (STRINGP (error_file
) && STRING_MULTIBYTE (error_file
))
401 error_file
= ENCODE_FILE (error_file
);
402 if (STRINGP (output_file
) && STRING_MULTIBYTE (output_file
))
403 output_file
= ENCODE_FILE (output_file
);
407 display_p
= INTERACTIVE
&& nargs
>= 4 && !NILP (args
[3]);
409 filefd
= emacs_open (SSDATA (infile
), O_RDONLY
, 0);
411 report_file_error ("Opening process input file",
412 Fcons (DECODE_FILE (infile
), Qnil
));
414 if (STRINGP (output_file
))
416 fd_output
= emacs_open (SSDATA (output_file
),
417 O_WRONLY
| O_CREAT
| O_TRUNC
| O_TEXT
,
418 default_output_mode
);
421 output_file
= DECODE_FILE (output_file
);
422 report_file_error ("Opening process output file",
423 Fcons (output_file
, Qnil
));
425 if (STRINGP (error_file
) || NILP (error_file
))
426 output_to_buffer
= 0;
429 /* Search for program; barf if not found. */
431 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
433 GCPRO4 (infile
, buffer
, current_dir
, error_file
);
434 openp (Vexec_path
, args
[0], Vexec_suffixes
, &path
, make_number (X_OK
));
439 int openp_errno
= errno
;
440 emacs_close (filefd
);
442 report_file_error ("Searching for program", Fcons (args
[0], Qnil
));
445 /* If program file name starts with /: for quoting a magic name,
447 if (SBYTES (path
) > 2 && SREF (path
, 0) == '/'
448 && SREF (path
, 1) == ':')
449 path
= Fsubstring (path
, make_number (2), Qnil
);
451 new_argv
= SAFE_ALLOCA ((nargs
> 4 ? nargs
- 2 : 2) * sizeof *new_argv
);
454 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
456 GCPRO5 (infile
, buffer
, current_dir
, path
, error_file
);
461 argument_coding
.dst_multibyte
= 0;
462 for (i
= 4; i
< nargs
; i
++)
464 argument_coding
.src_multibyte
= STRING_MULTIBYTE (args
[i
]);
465 if (CODING_REQUIRE_ENCODING (&argument_coding
))
466 /* We must encode this argument. */
467 args
[i
] = encode_coding_string (&argument_coding
, args
[i
], 1);
469 for (i
= 4; i
< nargs
; i
++)
470 new_argv
[i
- 3] = SSDATA (args
[i
]);
475 if (STRING_MULTIBYTE (path
))
476 path
= ENCODE_FILE (path
);
477 new_argv
[0] = SSDATA (path
);
481 #ifdef MSDOS /* MW, July 1993 */
483 /* If we're redirecting STDOUT to a file, that file is already open
487 if ((outf
= egetenv ("TMPDIR")))
488 strcpy (tempfile
= alloca (strlen (outf
) + 20), outf
);
491 tempfile
= alloca (20);
494 dostounix_filename (tempfile
, 0);
495 if (*tempfile
== '\0' || tempfile
[strlen (tempfile
) - 1] != '/')
496 strcat (tempfile
, "/");
497 strcat (tempfile
, "detmp.XXX");
499 outfilefd
= emacs_open (tempfile
, O_WRONLY
| O_CREAT
| O_TRUNC
,
502 emacs_close (filefd
);
503 report_file_error ("Opening process output file",
504 Fcons (build_string (tempfile
), Qnil
));
508 outfilefd
= fd_output
;
513 if (INTEGERP (buffer
))
516 fd1
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
524 int pipe_errno
= errno
;
525 emacs_close (filefd
);
527 report_file_error ("Creating process pipe", Qnil
);
540 if (NILP (error_file
))
541 fd_error
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
542 else if (STRINGP (error_file
))
543 fd_error
= emacs_open (SSDATA (error_file
),
544 O_WRONLY
| O_CREAT
| O_TRUNC
| O_TEXT
,
545 default_output_mode
);
549 emacs_close (filefd
);
557 if (NILP (error_file
))
558 error_file
= build_string (NULL_DEVICE
);
559 else if (STRINGP (error_file
))
560 error_file
= DECODE_FILE (error_file
);
561 report_file_error ("Cannot redirect stderr", Fcons (error_file
, Qnil
));
564 #ifdef MSDOS /* MW, July 1993 */
565 /* Note that on MSDOS `child_setup' actually returns the child process
566 exit status, not its PID, so assign it to status below. */
567 pid
= child_setup (filefd
, outfilefd
, fd_error
, new_argv
, 0, current_dir
);
570 emacs_close (outfilefd
);
571 if (fd_error
!= outfilefd
)
572 emacs_close (fd_error
);
575 synchronize_system_messages_locale ();
577 code_convert_string_norecord (build_string (strerror (child_errno
)),
578 Vlocale_coding_system
, 0);
581 fd1
= -1; /* No harm in closing that one! */
584 /* Since CRLF is converted to LF within `decode_coding', we
585 can always open a file with binary mode. */
586 fd0
= emacs_open (tempfile
, O_RDONLY
| O_BINARY
, 0);
590 emacs_close (filefd
);
591 report_file_error ("Cannot re-open temporary file",
592 Fcons (build_string (tempfile
), Qnil
));
596 fd0
= -1; /* We are not going to read from tempfile. */
599 /* Do the unwind-protect now, even though the pid is not known, so
600 that no storage allocation is done in the critical section.
601 The actual PID will be filled in during the critical section. */
602 synch_process_pid
= 0;
603 synch_process_fd
= fd0
;
606 /* MSDOS needs different cleanup information. */
607 record_unwind_protect (call_process_cleanup
,
608 Fcons (Fcurrent_buffer (),
609 build_string (tempfile
? tempfile
: "")));
611 record_unwind_protect (call_process_cleanup
, Fcurrent_buffer ());
614 block_child_signal ();
617 pid
= child_setup (filefd
, fd1
, fd_error
, new_argv
, 0, current_dir
);
618 /* We need to record the input file of this child, for when we are
619 called from call-process-region to create an async subprocess.
620 That's because call-process-region's unwind procedure will
621 attempt to delete the temporary input file, which will fail
622 because that file is still in use. Recording it with the child
623 will allow us to delete the file when the subprocess exits.
624 The second part of this is in delete_temp_file, q.v. */
625 if (pid
> 0 && INTEGERP (buffer
) && nargs
>= 2 && !NILP (args
[1]))
626 record_infile (pid
, xstrdup (SSDATA (infile
)));
627 #else /* not WINDOWSNT */
629 /* vfork, and prevent local vars from being clobbered by the vfork. */
631 Lisp_Object
volatile buffer_volatile
= buffer
;
632 Lisp_Object
volatile coding_systems_volatile
= coding_systems
;
633 Lisp_Object
volatile current_dir_volatile
= current_dir
;
634 bool volatile display_p_volatile
= display_p
;
635 bool volatile output_to_buffer_volatile
= output_to_buffer
;
636 bool volatile sa_must_free_volatile
= sa_must_free
;
637 int volatile fd1_volatile
= fd1
;
638 int volatile fd_error_volatile
= fd_error
;
639 int volatile fd_output_volatile
= fd_output
;
640 int volatile filefd_volatile
= filefd
;
641 ptrdiff_t volatile count_volatile
= count
;
642 ptrdiff_t volatile sa_count_volatile
= sa_count
;
643 char **volatile new_argv_volatile
= new_argv
;
648 buffer
= buffer_volatile
;
649 coding_systems
= coding_systems_volatile
;
650 current_dir
= current_dir_volatile
;
651 display_p
= display_p_volatile
;
652 output_to_buffer
= output_to_buffer_volatile
;
653 sa_must_free
= sa_must_free_volatile
;
655 fd_error
= fd_error_volatile
;
656 fd_output
= fd_output_volatile
;
657 filefd
= filefd_volatile
;
658 count
= count_volatile
;
659 sa_count
= sa_count_volatile
;
660 new_argv
= new_argv_volatile
;
662 fd0
= synch_process_fd
;
667 unblock_child_signal ();
674 /* Emacs ignores SIGPIPE, but the child should not. */
675 signal (SIGPIPE
, SIG_DFL
);
677 child_setup (filefd
, fd1
, fd_error
, new_argv
, 0, current_dir
);
680 #endif /* not WINDOWSNT */
686 if (INTEGERP (buffer
))
687 record_deleted_pid (pid
);
689 synch_process_pid
= pid
;
692 unblock_child_signal ();
695 /* The MSDOS case did this already. */
697 emacs_close (fd_error
);
698 #endif /* not MSDOS */
700 /* Close most of our file descriptors, but not fd0
701 since we will use that to read input from. */
702 emacs_close (filefd
);
704 emacs_close (fd_output
);
705 if (fd1
>= 0 && fd1
!= fd_error
)
712 report_file_error ("Doing vfork", Qnil
);
715 if (INTEGERP (buffer
))
716 return unbind_to (count
, Qnil
);
718 if (BUFFERP (buffer
))
719 Fset_buffer (buffer
);
723 /* If BUFFER is nil, we must read process output once and then
724 discard it, so setup coding system but with nil. */
725 setup_coding_system (Qnil
, &process_coding
);
726 process_coding
.dst_multibyte
= 0;
730 Lisp_Object val
, *args2
;
733 if (!NILP (Vcoding_system_for_read
))
734 val
= Vcoding_system_for_read
;
737 if (EQ (coding_systems
, Qt
))
741 SAFE_NALLOCA (args2
, 1, nargs
+ 1);
742 args2
[0] = Qcall_process
;
743 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
745 = Ffind_operation_coding_system (nargs
+ 1, args2
);
747 if (CONSP (coding_systems
))
748 val
= XCAR (coding_systems
);
749 else if (CONSP (Vdefault_process_coding_system
))
750 val
= XCAR (Vdefault_process_coding_system
);
754 Fcheck_coding_system (val
);
755 /* In unibyte mode, character code conversion should not take
756 place but EOL conversion should. So, setup raw-text or one
757 of the subsidiary according to the information just setup. */
758 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
760 val
= raw_text_coding_system (val
);
761 setup_coding_system (val
, &process_coding
);
762 process_coding
.dst_multibyte
763 = ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
765 process_coding
.src_multibyte
= 0;
770 if (output_to_buffer
)
772 enum { CALLPROC_BUFFER_SIZE_MIN
= 16 * 1024 };
773 enum { CALLPROC_BUFFER_SIZE_MAX
= 4 * CALLPROC_BUFFER_SIZE_MIN
};
774 char buf
[CALLPROC_BUFFER_SIZE_MAX
];
775 int bufsize
= CALLPROC_BUFFER_SIZE_MIN
;
778 EMACS_INT total_read
= 0;
780 bool display_on_the_fly
= display_p
;
781 struct coding_system saved_coding
;
783 saved_coding
= process_coding
;
786 /* Repeatedly read until we've filled as much as possible
787 of the buffer size we have. But don't read
788 less than 1024--save that for the next bufferful. */
790 while (nread
< bufsize
- 1024)
792 int this_read
= emacs_read (fd0
, buf
+ nread
,
800 process_coding
.mode
|= CODING_MODE_LAST_BLOCK
;
805 total_read
+= this_read
;
807 if (display_on_the_fly
)
811 /* Now NREAD is the total amount of data in the buffer. */
816 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
817 && ! CODING_MAY_REQUIRE_DECODING (&process_coding
))
818 insert_1_both (buf
, nread
, nread
, 0, 1, 0);
820 { /* We have to decode the input. */
822 ptrdiff_t count1
= SPECPDL_INDEX ();
824 XSETBUFFER (curbuf
, current_buffer
);
825 /* We cannot allow after-change-functions be run
826 during decoding, because that might modify the
827 buffer, while we rely on process_coding.produced to
828 faithfully reflect inserted text until we
829 TEMP_SET_PT_BOTH below. */
830 specbind (Qinhibit_modification_hooks
, Qt
);
831 decode_coding_c_string (&process_coding
,
832 (unsigned char *) buf
, nread
, curbuf
);
833 unbind_to (count1
, Qnil
);
834 if (display_on_the_fly
835 && CODING_REQUIRE_DETECTION (&saved_coding
)
836 && ! CODING_REQUIRE_DETECTION (&process_coding
))
838 /* We have detected some coding system. But,
839 there's a possibility that the detection was
840 done by insufficient data. So, we give up
841 displaying on the fly. */
842 if (process_coding
.produced
> 0)
843 del_range_2 (process_coding
.dst_pos
,
844 process_coding
.dst_pos_byte
,
845 process_coding
.dst_pos
846 + process_coding
.produced_char
,
847 process_coding
.dst_pos_byte
848 + process_coding
.produced
, 0);
849 display_on_the_fly
= 0;
850 process_coding
= saved_coding
;
852 /* This is to make the above condition always
853 fails in the future. */
854 saved_coding
.common_flags
855 &= ~CODING_REQUIRE_DETECTION_MASK
;
859 TEMP_SET_PT_BOTH (PT
+ process_coding
.produced_char
,
860 PT_BYTE
+ process_coding
.produced
);
861 carryover
= process_coding
.carryover_bytes
;
863 memcpy (buf
, process_coding
.carryover
,
864 process_coding
.carryover_bytes
);
868 if (process_coding
.mode
& CODING_MODE_LAST_BLOCK
)
871 /* Make the buffer bigger as we continue to read more data,
872 but not past CALLPROC_BUFFER_SIZE_MAX. */
873 if (bufsize
< CALLPROC_BUFFER_SIZE_MAX
&& total_read
> 32 * bufsize
)
874 if ((bufsize
*= 2) > CALLPROC_BUFFER_SIZE_MAX
)
875 bufsize
= CALLPROC_BUFFER_SIZE_MAX
;
880 prepare_menu_bars ();
882 redisplay_preserve_echo_area (1);
883 /* This variable might have been set to 0 for code
884 detection. In that case, we set it back to 1 because
885 we should have already detected a coding system. */
886 display_on_the_fly
= 1;
893 Vlast_coding_system_used
= CODING_ID_NAME (process_coding
.id
);
894 /* If the caller required, let the buffer inherit the
895 coding-system used to decode the process output. */
896 if (inherit_process_coding_system
)
897 call1 (intern ("after-insert-file-set-buffer-file-coding-system"),
898 make_number (total_read
));
902 /* Wait for it to terminate, unless it already has. */
903 wait_for_termination (pid
, &status
, !output_to_buffer
);
908 /* Don't kill any children that the subprocess may have left behind
910 synch_process_pid
= 0;
913 unbind_to (count
, Qnil
);
915 if (WIFSIGNALED (status
))
919 synchronize_system_messages_locale ();
920 signame
= strsignal (WTERMSIG (status
));
925 return code_convert_string_norecord (build_string (signame
),
926 Vlocale_coding_system
, 0);
929 eassert (WIFEXITED (status
));
930 return make_number (WEXITSTATUS (status
));
934 delete_temp_file (Lisp_Object name
)
936 /* Suppress jka-compr handling, etc. */
937 ptrdiff_t count
= SPECPDL_INDEX ();
938 specbind (intern ("file-name-handler-alist"), Qnil
);
940 /* If this is called when the subprocess didn't exit yet, the
941 attempt to delete its input file will fail. In that case, we
942 schedule the file for deletion when the subprocess exits. This
943 is the 2nd part of handling this situation; see the call to
944 record_infile in call-process above, for the first part. */
945 if (!internal_delete_file (name
))
947 Lisp_Object encoded_file
= ENCODE_FILE (name
);
949 record_pending_deletion (SSDATA (encoded_file
));
952 internal_delete_file (name
);
954 unbind_to (count
, Qnil
);
958 DEFUN ("call-process-region", Fcall_process_region
, Scall_process_region
,
960 doc
: /* Send text from START to END to a synchronous process running PROGRAM.
961 The remaining arguments are optional.
962 Delete the text if fourth arg DELETE is non-nil.
964 Insert output in BUFFER before point; t means current buffer; nil for
965 BUFFER means discard it; 0 means discard and don't wait; and `(:file
966 FILE)', where FILE is a file name string, means that it should be
967 written to that file (if the file already exists it is overwritten).
968 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
969 REAL-BUFFER says what to do with standard output, as above,
970 while STDERR-FILE says what to do with standard error in the child.
971 STDERR-FILE may be nil (discard standard error output),
972 t (mix it with ordinary output), or a file name string.
974 Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.
975 Remaining args are passed to PROGRAM at startup as command args.
977 If BUFFER is 0, `call-process-region' returns immediately with value nil.
978 Otherwise it waits for PROGRAM to terminate
979 and returns a numeric exit status or a signal description string.
980 If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
982 usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */)
983 (ptrdiff_t nargs
, Lisp_Object
*args
)
986 Lisp_Object filename_string
;
987 register Lisp_Object start
, end
;
988 ptrdiff_t count
= SPECPDL_INDEX ();
989 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
990 Lisp_Object coding_systems
;
991 Lisp_Object val
, *args2
;
995 if (STRINGP (Vtemporary_file_directory
))
996 tmpdir
= Vtemporary_file_directory
;
1001 outf
= getenv ("TMPDIR");
1002 tmpdir
= build_string (outf
? outf
: "/tmp/");
1004 if ((outf
= egetenv ("TMPDIR"))
1005 || (outf
= egetenv ("TMP"))
1006 || (outf
= egetenv ("TEMP")))
1007 tmpdir
= build_string (outf
);
1009 tmpdir
= Ffile_name_as_directory (build_string ("c:/temp"));
1015 Lisp_Object pattern
= Fexpand_file_name (Vtemp_file_name_pattern
, tmpdir
);
1016 Lisp_Object encoded_tem
;
1020 /* Cannot use the result of Fexpand_file_name, because it
1021 downcases the XXXXXX part of the pattern, and mktemp then
1022 doesn't recognize it. */
1023 if (!NILP (Vw32_downcase_file_names
))
1025 Lisp_Object dirname
= Ffile_name_directory (pattern
);
1028 pattern
= Vtemp_file_name_pattern
;
1030 pattern
= concat2 (dirname
, Vtemp_file_name_pattern
);
1034 encoded_tem
= ENCODE_FILE (pattern
);
1035 tempfile
= SAFE_ALLOCA (SBYTES (encoded_tem
) + 1);
1036 memcpy (tempfile
, SDATA (encoded_tem
), SBYTES (encoded_tem
) + 1);
1037 coding_systems
= Qt
;
1044 fd
= mkstemp (tempfile
);
1047 report_file_error ("Failed to open temporary file",
1048 Fcons (build_string (tempfile
), Qnil
));
1059 report_file_error ("Failed to open temporary file using pattern",
1060 Fcons (pattern
, Qnil
));
1064 filename_string
= build_string (tempfile
);
1065 GCPRO1 (filename_string
);
1071 /* Decide coding-system of the contents of the temporary file. */
1072 if (!NILP (Vcoding_system_for_write
))
1073 val
= Vcoding_system_for_write
;
1074 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
1079 SAFE_NALLOCA (args2
, 1, nargs
+ 1);
1080 args2
[0] = Qcall_process_region
;
1081 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1082 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1083 val
= CONSP (coding_systems
) ? XCDR (coding_systems
) : Qnil
;
1086 val
= complement_process_encoding_system (val
);
1089 ptrdiff_t count1
= SPECPDL_INDEX ();
1091 specbind (intern ("coding-system-for-write"), val
);
1092 /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we
1093 happen to get a ".Z" suffix. */
1094 specbind (intern ("file-name-handler-alist"), Qnil
);
1095 Fwrite_region (start
, end
, filename_string
, Qnil
, Qlambda
, Qnil
, Qnil
);
1097 unbind_to (count1
, Qnil
);
1100 /* Note that Fcall_process takes care of binding
1101 coding-system-for-read. */
1103 record_unwind_protect (delete_temp_file
, filename_string
);
1105 if (nargs
> 3 && !NILP (args
[3]))
1106 Fdelete_region (start
, end
);
1118 args
[1] = filename_string
;
1120 RETURN_UNGCPRO (unbind_to (count
, Fcall_process (nargs
, args
)));
1124 static int relocate_fd (int fd
, int minfd
);
1128 add_env (char **env
, char **new_env
, char *string
)
1135 /* See if this string duplicates any string already in the env.
1136 If so, don't put it in.
1137 When an env var has multiple definitions,
1138 we keep the definition that comes first in process-environment. */
1139 for (ep
= env
; ok
&& ep
!= new_env
; ep
++)
1141 char *p
= *ep
, *q
= string
;
1147 /* The string is a lone variable name; keep it for now, we
1148 will remove it later. It is a placeholder for a
1149 variable that is not to be included in the environment. */
1157 *new_env
++ = string
;
1161 /* This is the last thing run in a newly forked inferior
1162 either synchronous or asynchronous.
1163 Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2.
1164 Initialize inferior's priority, pgrp, connected dir and environment.
1165 then exec another program based on new_argv.
1167 If SET_PGRP, put the subprocess into a separate process group.
1169 CURRENT_DIR is an elisp string giving the path of the current
1170 directory the subprocess should have. Since we can't really signal
1171 a decent error from within the child, this should be verified as an
1172 executable directory by the parent. */
1175 child_setup (int in
, int out
, int err
, char **new_argv
, bool set_pgrp
,
1176 Lisp_Object current_dir
)
1183 #endif /* WINDOWSNT */
1185 pid_t pid
= getpid ();
1187 /* Close Emacs's descriptors that this process should not have. */
1188 close_process_descs ();
1190 /* DOS_NT isn't in a vfork, so if we are in the middle of load-file,
1191 we will lose if we call close_load_descs here. */
1193 close_load_descs ();
1196 /* Note that use of alloca is always safe here. It's obvious for systems
1197 that do not have true vfork or that have true (stack) alloca.
1198 If using vfork and C_ALLOCA (when Emacs used to include
1199 src/alloca.c) it is safe because that changes the superior's
1200 static variables as if the superior had done alloca and will be
1201 cleaned up in the usual way. */
1203 register char *temp
;
1204 size_t i
; /* size_t, because ptrdiff_t might overflow here! */
1206 i
= SBYTES (current_dir
);
1208 /* MSDOS must have all environment variables malloc'ed, because
1209 low-level libc functions that launch subsidiary processes rely
1211 pwd_var
= xmalloc (i
+ 6);
1213 pwd_var
= alloca (i
+ 6);
1216 memcpy (pwd_var
, "PWD=", 4);
1217 memcpy (temp
, SDATA (current_dir
), i
);
1218 if (!IS_DIRECTORY_SEP (temp
[i
- 1])) temp
[i
++] = DIRECTORY_SEP
;
1222 /* We can't signal an Elisp error here; we're in a vfork. Since
1223 the callers check the current directory before forking, this
1224 should only return an error if the directory's permissions
1225 are changed between the check and this chdir, but we should
1227 if (chdir (temp
) < 0)
1230 /* Get past the drive letter, so that d:/ is left alone. */
1231 if (i
> 2 && IS_DEVICE_SEP (temp
[1]) && IS_DIRECTORY_SEP (temp
[2]))
1238 /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */
1239 while (i
> 2 && IS_DIRECTORY_SEP (temp
[i
- 1]))
1243 /* Set `env' to a vector of the strings in the environment. */
1245 register Lisp_Object tem
;
1246 register char **new_env
;
1248 register int new_length
;
1249 Lisp_Object display
= Qnil
;
1253 for (tem
= Vprocess_environment
;
1254 CONSP (tem
) && STRINGP (XCAR (tem
));
1257 if (strncmp (SSDATA (XCAR (tem
)), "DISPLAY", 7) == 0
1258 && (SDATA (XCAR (tem
)) [7] == '\0'
1259 || SDATA (XCAR (tem
)) [7] == '='))
1260 /* DISPLAY is specified in process-environment. */
1265 /* If not provided yet, use the frame's DISPLAY. */
1268 Lisp_Object tmp
= Fframe_parameter (selected_frame
, Qdisplay
);
1269 if (!STRINGP (tmp
) && CONSP (Vinitial_environment
))
1270 /* If still not found, Look for DISPLAY in Vinitial_environment. */
1271 tmp
= Fgetenv_internal (build_string ("DISPLAY"),
1272 Vinitial_environment
);
1280 /* new_length + 2 to include PWD and terminating 0. */
1281 env
= new_env
= alloca ((new_length
+ 2) * sizeof *env
);
1282 /* If we have a PWD envvar, pass one down,
1283 but with corrected value. */
1284 if (egetenv ("PWD"))
1285 *new_env
++ = pwd_var
;
1287 if (STRINGP (display
))
1289 char *vdata
= alloca (sizeof "DISPLAY=" + SBYTES (display
));
1290 strcpy (vdata
, "DISPLAY=");
1291 strcat (vdata
, SSDATA (display
));
1292 new_env
= add_env (env
, new_env
, vdata
);
1296 for (tem
= Vprocess_environment
;
1297 CONSP (tem
) && STRINGP (XCAR (tem
));
1299 new_env
= add_env (env
, new_env
, SSDATA (XCAR (tem
)));
1303 /* Remove variable names without values. */
1307 while (*q
!= 0 && strchr (*q
, '=') == NULL
)
1317 prepare_standard_handles (in
, out
, err
, handles
);
1318 set_process_dir (SDATA (current_dir
));
1319 /* Spawn the child. (See w32proc.c:sys_spawnve). */
1320 cpid
= spawnve (_P_NOWAIT
, new_argv
[0], new_argv
, env
);
1321 reset_standard_handles (in
, out
, err
, handles
);
1323 /* An error occurred while trying to spawn the process. */
1324 report_file_error ("Spawning child process", Qnil
);
1327 #else /* not WINDOWSNT */
1328 /* Make sure that in, out, and err are not actually already in
1329 descriptors zero, one, or two; this could happen if Emacs is
1330 started with its standard in, out, or error closed, as might
1333 int oin
= in
, oout
= out
;
1335 /* We have to avoid relocating the same descriptor twice! */
1337 in
= relocate_fd (in
, 3);
1342 out
= relocate_fd (out
, 3);
1346 else if (err
== oout
)
1349 err
= relocate_fd (err
, 3);
1363 if (err
!= in
&& err
!= out
)
1369 execve (new_argv
[0], new_argv
, env
);
1371 emacs_write (1, "Can't exec program: ", 20);
1372 emacs_write (1, new_argv
[0], strlen (new_argv
[0]));
1373 emacs_write (1, "\n", 1);
1377 pid
= run_msdos_command (new_argv
, pwd_var
+ 4, in
, out
, err
, env
);
1380 /* An error occurred while trying to run the subprocess. */
1381 report_file_error ("Spawning child process", Qnil
);
1384 #endif /* not WINDOWSNT */
1388 /* Move the file descriptor FD so that its number is not less than MINFD.
1389 If the file descriptor is moved at all, the original is freed. */
1391 relocate_fd (int fd
, int minfd
)
1397 int new = fcntl (fd
, F_DUPFD
, minfd
);
1400 const char *message_1
= "Error while setting up child: ";
1401 const char *errmessage
= strerror (errno
);
1402 const char *message_2
= "\n";
1403 emacs_write (2, message_1
, strlen (message_1
));
1404 emacs_write (2, errmessage
, strlen (errmessage
));
1405 emacs_write (2, message_2
, strlen (message_2
));
1412 #endif /* not WINDOWSNT */
1415 getenv_internal_1 (const char *var
, ptrdiff_t varlen
, char **value
,
1416 ptrdiff_t *valuelen
, Lisp_Object env
)
1418 for (; CONSP (env
); env
= XCDR (env
))
1420 Lisp_Object entry
= XCAR (env
);
1422 && SBYTES (entry
) >= varlen
1424 /* NT environment variables are case insensitive. */
1425 && ! strnicmp (SDATA (entry
), var
, varlen
)
1426 #else /* not WINDOWSNT */
1427 && ! memcmp (SDATA (entry
), var
, varlen
)
1428 #endif /* not WINDOWSNT */
1431 if (SBYTES (entry
) > varlen
&& SREF (entry
, varlen
) == '=')
1433 *value
= SSDATA (entry
) + (varlen
+ 1);
1434 *valuelen
= SBYTES (entry
) - (varlen
+ 1);
1437 else if (SBYTES (entry
) == varlen
)
1439 /* Lone variable names in Vprocess_environment mean that
1440 variable should be removed from the environment. */
1450 getenv_internal (const char *var
, ptrdiff_t varlen
, char **value
,
1451 ptrdiff_t *valuelen
, Lisp_Object frame
)
1453 /* Try to find VAR in Vprocess_environment first. */
1454 if (getenv_internal_1 (var
, varlen
, value
, valuelen
,
1455 Vprocess_environment
))
1456 return *value
? 1 : 0;
1458 /* For DISPLAY try to get the values from the frame or the initial env. */
1459 if (strcmp (var
, "DISPLAY") == 0)
1462 = Fframe_parameter (NILP (frame
) ? selected_frame
: frame
, Qdisplay
);
1463 if (STRINGP (display
))
1465 *value
= SSDATA (display
);
1466 *valuelen
= SBYTES (display
);
1469 /* If still not found, Look for DISPLAY in Vinitial_environment. */
1470 if (getenv_internal_1 (var
, varlen
, value
, valuelen
,
1471 Vinitial_environment
))
1472 return *value
? 1 : 0;
1478 DEFUN ("getenv-internal", Fgetenv_internal
, Sgetenv_internal
, 1, 2, 0,
1479 doc
: /* Get the value of environment variable VARIABLE.
1480 VARIABLE should be a string. Value is nil if VARIABLE is undefined in
1481 the environment. Otherwise, value is a string.
1483 This function searches `process-environment' for VARIABLE.
1485 If optional parameter ENV is a list, then search this list instead of
1486 `process-environment', and return t when encountering a negative entry
1487 \(an entry for a variable with no value). */)
1488 (Lisp_Object variable
, Lisp_Object env
)
1493 CHECK_STRING (variable
);
1496 if (getenv_internal_1 (SSDATA (variable
), SBYTES (variable
),
1497 &value
, &valuelen
, env
))
1498 return value
? make_string (value
, valuelen
) : Qt
;
1502 else if (getenv_internal (SSDATA (variable
), SBYTES (variable
),
1503 &value
, &valuelen
, env
))
1504 return make_string (value
, valuelen
);
1509 /* A version of getenv that consults the Lisp environment lists,
1510 easily callable from C. */
1512 egetenv (const char *var
)
1517 if (getenv_internal (var
, strlen (var
), &value
, &valuelen
, Qnil
))
1524 /* This is run before init_cmdargs. */
1527 init_callproc_1 (void)
1530 const char *etc_dir
= ns_etc_directory ();
1531 const char *path_exec
= ns_exec_path ();
1534 Vdata_directory
= decode_env_path ("EMACSDATA",
1539 Vdata_directory
= Ffile_name_as_directory (Fcar (Vdata_directory
));
1541 Vdoc_directory
= decode_env_path ("EMACSDOC",
1546 Vdoc_directory
= Ffile_name_as_directory (Fcar (Vdoc_directory
));
1548 /* Check the EMACSPATH environment variable, defaulting to the
1549 PATH_EXEC path from epaths.h. */
1550 Vexec_path
= decode_env_path ("EMACSPATH",
1552 path_exec
? path_exec
:
1555 Vexec_directory
= Ffile_name_as_directory (Fcar (Vexec_path
));
1556 /* FIXME? For ns, path_exec should go at the front? */
1557 Vexec_path
= nconc2 (decode_env_path ("PATH", ""), Vexec_path
);
1560 /* This is run after init_cmdargs, when Vinstallation_directory is valid. */
1563 init_callproc (void)
1565 char *data_dir
= egetenv ("EMACSDATA");
1568 Lisp_Object tempdir
;
1572 const char *etc_dir
= ns_etc_directory ();
1575 data_dir
= alloca (strlen (etc_dir
) + 1);
1576 strcpy (data_dir
, etc_dir
);
1581 if (!NILP (Vinstallation_directory
))
1583 /* Add to the path the lib-src subdir of the installation dir. */
1585 tem
= Fexpand_file_name (build_string ("lib-src"),
1586 Vinstallation_directory
);
1588 /* MSDOS uses wrapped binaries, so don't do this. */
1589 if (NILP (Fmember (tem
, Vexec_path
)))
1592 const char *path_exec
= ns_exec_path ();
1594 Vexec_path
= decode_env_path ("EMACSPATH",
1596 path_exec
? path_exec
:
1599 Vexec_path
= Fcons (tem
, Vexec_path
);
1600 Vexec_path
= nconc2 (decode_env_path ("PATH", ""), Vexec_path
);
1603 Vexec_directory
= Ffile_name_as_directory (tem
);
1604 #endif /* not MSDOS */
1606 /* Maybe use ../etc as well as ../lib-src. */
1609 tem
= Fexpand_file_name (build_string ("etc"),
1610 Vinstallation_directory
);
1611 Vdoc_directory
= Ffile_name_as_directory (tem
);
1615 /* Look for the files that should be in etc. We don't use
1616 Vinstallation_directory, because these files are never installed
1617 near the executable, and they are never in the build
1618 directory when that's different from the source directory.
1620 Instead, if these files are not in the nominal place, we try the
1621 source directory. */
1624 Lisp_Object tem
, tem1
, srcdir
;
1626 srcdir
= Fexpand_file_name (build_string ("../src/"),
1627 build_string (PATH_DUMPLOADSEARCH
));
1628 tem
= Fexpand_file_name (build_string ("GNU"), Vdata_directory
);
1629 tem1
= Ffile_exists_p (tem
);
1630 if (!NILP (Fequal (srcdir
, Vinvocation_directory
)) || NILP (tem1
))
1633 newdir
= Fexpand_file_name (build_string ("../etc/"),
1634 build_string (PATH_DUMPLOADSEARCH
));
1635 tem
= Fexpand_file_name (build_string ("GNU"), newdir
);
1636 tem1
= Ffile_exists_p (tem
);
1638 Vdata_directory
= newdir
;
1646 tempdir
= Fdirectory_file_name (Vexec_directory
);
1647 if (! file_accessible_directory_p (SSDATA (tempdir
)))
1648 dir_warning ("arch-dependent data dir", Vexec_directory
);
1651 tempdir
= Fdirectory_file_name (Vdata_directory
);
1652 if (! file_accessible_directory_p (SSDATA (tempdir
)))
1653 dir_warning ("arch-independent data dir", Vdata_directory
);
1655 sh
= getenv ("SHELL");
1656 Vshell_file_name
= build_string (sh
? sh
: "/bin/sh");
1659 Vshared_game_score_directory
= Qnil
;
1661 Vshared_game_score_directory
= build_string (PATH_GAME
);
1662 if (NILP (Ffile_accessible_directory_p (Vshared_game_score_directory
)))
1663 Vshared_game_score_directory
= Qnil
;
1668 set_initial_environment (void)
1671 for (envp
= environ
; *envp
; envp
++)
1672 Vprocess_environment
= Fcons (build_string (*envp
),
1673 Vprocess_environment
);
1674 /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent
1675 to use `delete' and friends on process-environment. */
1676 Vinitial_environment
= Fcopy_sequence (Vprocess_environment
);
1680 syms_of_callproc (void)
1683 Vtemp_file_name_pattern
= build_string ("emacsXXXXXX");
1684 #elif defined (WINDOWSNT)
1685 Vtemp_file_name_pattern
= build_string ("emXXXXXX");
1687 Vtemp_file_name_pattern
= build_string ("detmp.XXX");
1689 staticpro (&Vtemp_file_name_pattern
);
1691 DEFVAR_LISP ("shell-file-name", Vshell_file_name
,
1692 doc
: /* File name to load inferior shells from.
1693 Initialized from the SHELL environment variable, or to a system-dependent
1694 default if SHELL is not set. */);
1696 DEFVAR_LISP ("exec-path", Vexec_path
,
1697 doc
: /* List of directories to search programs to run in subprocesses.
1698 Each element is a string (directory name) or nil (try default directory). */);
1700 DEFVAR_LISP ("exec-suffixes", Vexec_suffixes
,
1701 doc
: /* List of suffixes to try to find executable file names.
1702 Each element is a string. */);
1703 Vexec_suffixes
= Qnil
;
1705 DEFVAR_LISP ("exec-directory", Vexec_directory
,
1706 doc
: /* Directory for executables for Emacs to invoke.
1707 More generally, this includes any architecture-dependent files
1708 that are built and installed from the Emacs distribution. */);
1710 DEFVAR_LISP ("data-directory", Vdata_directory
,
1711 doc
: /* Directory of machine-independent files that come with GNU Emacs.
1712 These are files intended for Emacs to use while it runs. */);
1714 DEFVAR_LISP ("doc-directory", Vdoc_directory
,
1715 doc
: /* Directory containing the DOC file that comes with GNU Emacs.
1716 This is usually the same as `data-directory'. */);
1718 DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory
,
1719 doc
: /* For internal use by the build procedure only.
1720 This is the name of the directory in which the build procedure installed
1721 Emacs's info files; the default value for `Info-default-directory-list'
1723 Vconfigure_info_directory
= build_string (PATH_INFO
);
1725 DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory
,
1726 doc
: /* Directory of score files for games which come with GNU Emacs.
1727 If this variable is nil, then Emacs is unable to use a shared directory. */);
1729 Vshared_game_score_directory
= Qnil
;
1731 Vshared_game_score_directory
= build_string (PATH_GAME
);
1734 DEFVAR_LISP ("initial-environment", Vinitial_environment
,
1735 doc
: /* List of environment variables inherited from the parent process.
1736 Each element should be a string of the form ENVVARNAME=VALUE.
1737 The elements must normally be decoded (using `locale-coding-system') for use. */);
1738 Vinitial_environment
= Qnil
;
1740 DEFVAR_LISP ("process-environment", Vprocess_environment
,
1741 doc
: /* List of overridden environment variables for subprocesses to inherit.
1742 Each element should be a string of the form ENVVARNAME=VALUE.
1744 Entries in this list take precedence to those in the frame-local
1745 environments. Therefore, let-binding `process-environment' is an easy
1746 way to temporarily change the value of an environment variable,
1747 irrespective of where it comes from. To use `process-environment' to
1748 remove an environment variable, include only its name in the list,
1751 This variable is set to nil when Emacs starts.
1753 If multiple entries define the same variable, the first one always
1756 Non-ASCII characters are encoded according to the initial value of
1757 `locale-coding-system', i.e. the elements must normally be decoded for
1760 See `setenv' and `getenv'. */);
1761 Vprocess_environment
= Qnil
;
1763 defsubr (&Scall_process
);
1764 defsubr (&Sgetenv_internal
);
1765 defsubr (&Scall_process_region
);