1 /* Synchronous subprocess invocation for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1995, 1999-2014 Free Software Foundation,
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
25 #include <sys/types.h>
35 #include <sys/socket.h> /* for fcntl */
38 #define _P_NOWAIT 1 /* from process.h */
41 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
43 #include <sys/param.h>
47 #include "character.h"
51 #include "composite.h"
54 #include "syssignal.h"
57 #include "blockinput.h"
59 #include "termhooks.h"
69 /* Pattern used by call-process-region to make temp files. */
70 static Lisp_Object Vtemp_file_name_pattern
;
72 /* The next two variables are used while record-unwind-protect is in place
73 during call-process for a subprocess for which record_deleted_pid has
74 not yet been called. At other times, synch_process_pid is zero and
75 synch_process_tempfile's contents are irrelevant. Doing this via static
76 C variables is more convenient than putting them into the arguments
77 of record-unwind-protect, as they need to be updated at randomish
78 times in the code, and Lisp cannot always store these values as
79 Emacs integers. It's safe to use static variables here, as the
80 code is never invoked reentrantly. */
82 /* If nonzero, a process-ID that has not been reaped. */
83 static pid_t synch_process_pid
;
85 static Lisp_Object synch_process_tempfile
;
87 /* Indexes of file descriptors that need closing on call_process_kill. */
90 /* The subsidiary process's stdout and stderr. stdin is handled
91 separately, in either Fcall_process_region or create_temp_file. */
92 CALLPROC_STDOUT
, CALLPROC_STDERR
,
94 /* How to read from a pipe (or substitute) from the subsidiary process. */
97 /* A bound on the number of file descriptors. */
101 static Lisp_Object
call_process (ptrdiff_t, Lisp_Object
*, int *, Lisp_Object
*);
103 /* Return the current buffer's working directory, or the home
104 directory if it's unreachable, as a string suitable for a system call.
105 Signal an error if the result would not be an accessible directory. */
108 encode_current_directory (void)
113 dir
= BVAR (current_buffer
, directory
);
116 dir
= Funhandled_file_name_directory (dir
);
118 /* If the file name handler says that dir is unreachable, use
119 a sensible default. */
121 dir
= build_string ("~");
123 dir
= expand_and_dir_to_file (dir
, Qnil
);
125 if (STRING_MULTIBYTE (dir
))
126 dir
= ENCODE_FILE (dir
);
127 if (! file_accessible_directory_p (SSDATA (dir
)))
128 report_file_error ("Setting current directory",
129 BVAR (current_buffer
, directory
));
134 /* If P is reapable, record it as a deleted process and kill it.
135 Do this in a critical section. Unless PID is wedged it will be
136 reaped on receipt of the first SIGCHLD after the critical section. */
139 record_kill_process (struct Lisp_Process
*p
, Lisp_Object tempfile
)
143 block_child_signal (&oldset
);
147 record_deleted_pid (p
->pid
, tempfile
);
149 kill (- p
->pid
, SIGKILL
);
152 unblock_child_signal (&oldset
);
156 /* Clean up files, file descriptors and processes created by Fcall_process. */
159 delete_temp_file_ptr (Lisp_Object
*name_ptr
)
161 Lisp_Object name
= *name_ptr
;
163 unlink (SSDATA (name
));
167 call_process_kill (void *ptr
)
169 int *callproc_fd
= ptr
;
171 for (i
= 0; i
< CALLPROC_FDS
; i
++)
172 if (0 <= callproc_fd
[i
])
173 emacs_close (callproc_fd
[i
]);
175 if (synch_process_pid
)
177 struct Lisp_Process proc
;
179 proc
.pid
= synch_process_pid
;
180 record_kill_process (&proc
, synch_process_tempfile
);
181 synch_process_pid
= 0;
183 else if (STRINGP (synch_process_tempfile
))
184 delete_temp_file_ptr (&synch_process_tempfile
);
187 /* Clean up when exiting Fcall_process: restore the buffer, and
188 kill the subsidiary process group if the process still exists. */
191 call_process_cleanup (Lisp_Object buffer
)
193 Fset_buffer (buffer
);
196 if (synch_process_pid
)
198 kill (-synch_process_pid
, SIGINT
);
199 message1 ("Waiting for process to die...(type C-g again to kill it instantly)");
202 wait_for_termination (synch_process_pid
, 0, 1);
203 synch_process_pid
= 0;
205 message1 ("Waiting for process to die...done");
211 static mode_t
const default_output_mode
= S_IREAD
| S_IWRITE
;
213 static mode_t
const default_output_mode
= 0666;
216 DEFUN ("call-process", Fcall_process
, Scall_process
, 1, MANY
, 0,
217 doc
: /* Call PROGRAM synchronously in separate process.
218 The remaining arguments are optional.
219 The program's input comes from file INFILE (nil means `/dev/null').
220 Insert output in DESTINATION before point; t means current buffer; nil for DESTINATION
221 means discard it; 0 means discard and don't wait; and `(:file FILE)', where
222 FILE is a file name string, means that it should be written to that file
223 \(if the file already exists it is overwritten).
224 DESTINATION can also have the form (REAL-BUFFER STDERR-FILE); in that case,
225 REAL-BUFFER says what to do with standard output, as above,
226 while STDERR-FILE says what to do with standard error in the child.
227 STDERR-FILE may be nil (discard standard error output),
228 t (mix it with ordinary output), or a file name string.
230 Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.
231 Remaining arguments are strings passed as command arguments to PROGRAM.
233 If executable PROGRAM can't be found as an executable, `call-process'
234 signals a Lisp error. `call-process' reports errors in execution of
235 the program only through its return and output.
237 If DESTINATION is 0, `call-process' returns immediately with value nil.
238 Otherwise it waits for PROGRAM to terminate
239 and returns a numeric exit status or a signal description string.
240 If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
242 usage: (call-process PROGRAM &optional INFILE DESTINATION DISPLAY &rest ARGS) */)
243 (ptrdiff_t nargs
, Lisp_Object
*args
)
245 Lisp_Object infile
, encoded_infile
;
250 if (nargs
>= 2 && ! NILP (args
[1]))
252 infile
= Fexpand_file_name (args
[1], BVAR (current_buffer
, directory
));
253 CHECK_STRING (infile
);
256 infile
= build_string (NULL_DEVICE
);
259 encoded_infile
= STRING_MULTIBYTE (infile
) ? ENCODE_FILE (infile
) : infile
;
261 filefd
= emacs_open (SSDATA (encoded_infile
), O_RDONLY
, 0);
263 report_file_error ("Opening process input file", infile
);
264 record_unwind_protect_ptr (close_file_ptr_unwind
, &filefd
);
266 Lisp_Object tem0
= call_process (nargs
, args
, &filefd
, NULL
);
271 /* Like Fcall_process (NARGS, ARGS), except use FILEFD as the input file.
273 If TEMPFILE_INDEX is nonnegative, it is the specpdl index of an
274 unwinder that is intended to remove the input temporary file; in
275 this case NARGS must be at least 2 and ARGS[1] is the file's name.
277 At entry, the specpdl stack top entry must be close_file_unwind (FILEFD). */
280 call_process (ptrdiff_t nargs
, Lisp_Object
*args
, int *filefd
, Lisp_Object
*tempfile_ptr
)
282 Lisp_Object buffer
, current_dir
, path
;
285 int callproc_fd
[CALLPROC_FDS
];
291 /* File to use for stderr in the child.
292 t means use same as standard output. */
293 Lisp_Object error_file
;
294 Lisp_Object output_file
= Qnil
;
295 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
296 char *tempfile
= NULL
;
303 int fd_output
, fd_error
;
304 struct coding_system process_coding
; /* coding-system of process output */
305 struct coding_system argument_coding
; /* coding-system of arguments */
306 /* Set to the return value of Ffind_operation_coding_system. */
307 Lisp_Object coding_systems
;
312 if (synch_process_pid
)
313 error ("call-process invoked recursively");
315 /* Qt denotes that Ffind_operation_coding_system is not yet called. */
318 CHECK_STRING (args
[0]);
323 /* Without asynchronous processes we cannot have BUFFER == 0. */
325 && (INTEGERP (CONSP (args
[2]) ? XCAR (args
[2]) : args
[2])))
326 error ("Operating system cannot handle asynchronous subprocesses");
327 #endif /* subprocesses */
329 /* Decide the coding-system for giving arguments. */
331 Lisp_Object val
, *args2
;
333 /* If arguments are supplied, we may have to encode them. */
336 bool must_encode
= 0;
337 Lisp_Object coding_attrs
;
339 for (i
= 4; i
< nargs
; i
++)
340 CHECK_STRING (args
[i
]);
342 for (i
= 4; i
< nargs
; i
++)
343 if (STRING_MULTIBYTE (args
[i
]))
346 if (!NILP (Vcoding_system_for_write
))
347 val
= Vcoding_system_for_write
;
348 else if (! must_encode
)
352 SAFE_NALLOCA (args2
, 1, nargs
+ 1);
353 args2
[0] = Qcall_process
;
354 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
355 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
356 val
= CONSP (coding_systems
) ? XCDR (coding_systems
) : Qnil
;
358 val
= complement_process_encoding_system (val
);
359 setup_coding_system (Fcheck_coding_system (val
), &argument_coding
);
360 coding_attrs
= CODING_ID_ATTRS (argument_coding
.id
);
361 if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs
)))
363 /* We should not use an ASCII incompatible coding system. */
364 val
= raw_text_coding_system (val
);
365 setup_coding_system (val
, &argument_coding
);
376 /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT
377 FILE-FOR-STDERR), unless the first element is :file, in which case see
378 the next paragraph. */
379 if (CONSP (buffer
) && !EQ (XCAR (buffer
), QCfile
))
381 if (CONSP (XCDR (buffer
)))
383 Lisp_Object stderr_file
;
384 stderr_file
= XCAR (XCDR (buffer
));
386 if (NILP (stderr_file
) || EQ (Qt
, stderr_file
))
387 error_file
= stderr_file
;
389 error_file
= Fexpand_file_name (stderr_file
, Qnil
);
392 buffer
= XCAR (buffer
);
395 /* If the buffer is (still) a list, it might be a (:file "file") spec. */
396 if (CONSP (buffer
) && EQ (XCAR (buffer
), QCfile
))
398 output_file
= Fexpand_file_name (XCAR (XCDR (buffer
)),
399 BVAR (current_buffer
, directory
));
400 CHECK_STRING (output_file
);
404 if (! (NILP (buffer
) || EQ (buffer
, Qt
) || INTEGERP (buffer
)))
406 Lisp_Object spec_buffer
;
407 spec_buffer
= buffer
;
408 buffer
= Fget_buffer_create (buffer
);
409 /* Mention the buffer name for a better error message. */
411 CHECK_BUFFER (spec_buffer
);
412 CHECK_BUFFER (buffer
);
416 /* Make sure that the child will be able to chdir to the current
417 buffer's current directory, or its unhandled equivalent. We
418 can't just have the child check for an error when it does the
419 chdir, since it's in a vfork.
421 We have to GCPRO around this because Fexpand_file_name,
422 Funhandled_file_name_directory, and Ffile_accessible_directory_p
423 might call a file name handling function. The argument list is
424 protected by the caller, so all we really have to worry about is
427 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
429 current_dir
= encode_current_directory ();
431 GCPRO4 (buffer
, current_dir
, error_file
, output_file
);
433 if (STRINGP (error_file
) && STRING_MULTIBYTE (error_file
))
434 error_file
= ENCODE_FILE (error_file
);
435 if (STRINGP (output_file
) && STRING_MULTIBYTE (output_file
))
436 output_file
= ENCODE_FILE (output_file
);
440 display_p
= INTERACTIVE
&& nargs
>= 4 && !NILP (args
[3]);
442 for (i
= 0; i
< CALLPROC_FDS
; i
++)
445 synch_process_tempfile
= make_number (0);
447 record_unwind_protect_ptr (call_process_kill
, callproc_fd
);
449 /* Search for program; barf if not found. */
451 struct gcpro gcpro1
, gcpro2
, gcpro3
;
454 GCPRO3 (buffer
, current_dir
, error_file
);
455 ok
= openp (Vexec_path
, args
[0], Vexec_suffixes
, &path
,
456 make_number (X_OK
), false);
459 report_file_error ("Searching for program", args
[0]);
462 /* If program file name starts with /: for quoting a magic name,
464 if (SBYTES (path
) > 2 && SREF (path
, 0) == '/'
465 && SREF (path
, 1) == ':')
466 path
= Fsubstring (path
, make_number (2), Qnil
);
468 new_argv
= SAFE_ALLOCA ((nargs
> 4 ? nargs
- 2 : 2) * sizeof *new_argv
);
471 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
473 GCPRO4 (buffer
, current_dir
, path
, error_file
);
478 argument_coding
.dst_multibyte
= 0;
479 for (i
= 4; i
< nargs
; i
++)
481 argument_coding
.src_multibyte
= STRING_MULTIBYTE (args
[i
]);
482 if (CODING_REQUIRE_ENCODING (&argument_coding
))
483 /* We must encode this argument. */
484 args
[i
] = encode_coding_string (&argument_coding
, args
[i
], 1);
486 for (i
= 4; i
< nargs
; i
++)
487 new_argv
[i
- 3] = SSDATA (args
[i
]);
492 if (STRING_MULTIBYTE (path
))
493 path
= ENCODE_FILE (path
);
494 new_argv
[0] = SSDATA (path
);
498 discard_output
= INTEGERP (buffer
) || (NILP (buffer
) && NILP (output_file
));
501 if (! discard_output
&& ! STRINGP (output_file
))
503 char const *tmpdir
= egetenv ("TMPDIR");
504 char const *outf
= tmpdir
? tmpdir
: "";
505 tempfile
= alloca (strlen (outf
) + 20);
506 strcpy (tempfile
, outf
);
507 dostounix_filename (tempfile
);
508 if (*tempfile
== '\0' || tempfile
[strlen (tempfile
) - 1] != '/')
509 strcat (tempfile
, "/");
510 strcat (tempfile
, "emXXXXXX");
513 report_file_error ("Opening process output file", Qnil
);
514 output_file
= build_string (tempfile
);
515 synch_process_tempfile
= output_file
;
521 fd_output
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
523 report_file_error ("Opening null device", Qnil
);
525 else if (STRINGP (output_file
))
527 fd_output
= emacs_open (SSDATA (output_file
),
528 O_WRONLY
| O_CREAT
| O_TRUNC
| O_TEXT
,
529 default_output_mode
);
532 int open_errno
= errno
;
533 output_file
= DECODE_FILE (output_file
);
534 report_file_errno ("Opening process output file",
535 output_file
, open_errno
);
541 if (emacs_pipe (fd
) != 0)
542 report_file_error ("Creating process pipe", Qnil
);
543 callproc_fd
[CALLPROC_PIPEREAD
] = fd
[0];
546 callproc_fd
[CALLPROC_STDOUT
] = fd_output
;
548 fd_error
= fd_output
;
550 if (STRINGP (error_file
) || (NILP (error_file
) && !discard_output
))
552 fd_error
= emacs_open ((STRINGP (error_file
)
553 ? SSDATA (error_file
)
555 O_WRONLY
| O_CREAT
| O_TRUNC
| O_TEXT
,
556 default_output_mode
);
559 int open_errno
= errno
;
560 report_file_errno ("Cannot redirect stderr",
561 (STRINGP (error_file
)
562 ? DECODE_FILE (error_file
)
563 : build_string (NULL_DEVICE
)),
566 callproc_fd
[CALLPROC_STDERR
] = fd_error
;
569 #ifdef MSDOS /* MW, July 1993 */
570 /* Note that on MSDOS `child_setup' actually returns the child process
571 exit status, not its PID, so assign it to status below. */
572 pid
= child_setup (*filefd
, fd_output
, fd_error
, new_argv
, 0, current_dir
);
578 synchronize_system_messages_locale ();
580 code_convert_string_norecord (build_string (strerror (child_errno
)),
581 Vlocale_coding_system
, 0);
585 for (i
= 0; i
< CALLPROC_FDS
; i
++)
586 if (0 <= callproc_fd
[i
])
588 emacs_close (callproc_fd
[i
]);
591 emacs_close (*filefd
);
596 /* Since CRLF is converted to LF within `decode_coding', we
597 can always open a file with binary mode. */
598 callproc_fd
[CALLPROC_PIPEREAD
] = emacs_open (tempfile
,
599 O_RDONLY
| O_BINARY
, 0);
600 if (callproc_fd
[CALLPROC_PIPEREAD
] < 0)
602 int open_errno
= errno
;
603 report_file_errno ("Cannot re-open temporary file",
604 build_string (tempfile
), open_errno
);
610 /* Do the unwind-protect now, even though the pid is not known, so
611 that no storage allocation is done in the critical section.
612 The actual PID will be filled in during the critical section. */
613 record_unwind_protect (call_process_cleanup
, Fcurrent_buffer ());
618 block_child_signal (&oldset
);
621 pid
= child_setup (*filefd
, fd_output
, fd_error
, new_argv
, 0, current_dir
);
622 #else /* not WINDOWSNT */
624 /* vfork, and prevent local vars from being clobbered by the vfork. */
626 Lisp_Object
volatile buffer_volatile
= buffer
;
627 Lisp_Object
volatile coding_systems_volatile
= coding_systems
;
628 Lisp_Object
volatile current_dir_volatile
= current_dir
;
629 bool volatile display_p_volatile
= display_p
;
630 int volatile fd_error_volatile
= fd_error
;
631 int *volatile filefd_volatile
= filefd
;
632 char **volatile new_argv_volatile
= new_argv
;
633 int volatile callproc_fd_volatile
[CALLPROC_FDS
];
634 for (i
= 0; i
< CALLPROC_FDS
; i
++)
635 callproc_fd_volatile
[i
] = callproc_fd
[i
];
639 buffer
= buffer_volatile
;
640 coding_systems
= coding_systems_volatile
;
641 current_dir
= current_dir_volatile
;
642 display_p
= display_p_volatile
;
643 fd_error
= fd_error_volatile
;
644 filefd
= filefd_volatile
;
645 new_argv
= new_argv_volatile
;
647 for (i
= 0; i
< CALLPROC_FDS
; i
++)
648 callproc_fd
[i
] = callproc_fd_volatile
[i
];
649 fd_output
= callproc_fd
[CALLPROC_STDOUT
];
654 unblock_child_signal (&oldset
);
658 /* Emacs ignores SIGPIPE, but the child should not. */
659 signal (SIGPIPE
, SIG_DFL
);
660 /* Likewise for SIGPROF. */
662 signal (SIGPROF
, SIG_DFL
);
665 child_setup (*filefd
, fd_output
, fd_error
, new_argv
, 0, current_dir
);
668 #endif /* not WINDOWSNT */
674 synch_process_pid
= pid
;
676 if (INTEGERP (buffer
))
680 record_deleted_pid (pid
, *tempfile_ptr
);
681 *tempfile_ptr
= Qnil
;
685 record_deleted_pid (pid
, Qnil
);
687 synch_process_pid
= 0;
691 unblock_child_signal (&oldset
);
695 report_file_errno ("Doing vfork", Qnil
, child_errno
);
697 /* Close our file descriptors, except for callproc_fd[CALLPROC_PIPEREAD]
698 since we will use that to read input from. */
699 for (i
= 0; i
< CALLPROC_FDS
; i
++)
700 if (i
!= CALLPROC_PIPEREAD
&& 0 <= callproc_fd
[i
])
702 emacs_close (callproc_fd
[i
]);
705 emacs_close (*filefd
);
708 #endif /* not MSDOS */
710 if (INTEGERP (buffer
))
716 if (BUFFERP (buffer
))
717 Fset_buffer (buffer
);
719 fd0
= callproc_fd
[CALLPROC_PIPEREAD
];
723 Lisp_Object val
, *args2
;
726 if (!NILP (Vcoding_system_for_read
))
727 val
= Vcoding_system_for_read
;
730 if (EQ (coding_systems
, Qt
))
734 SAFE_NALLOCA (args2
, 1, nargs
+ 1);
735 args2
[0] = Qcall_process
;
736 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
738 = Ffind_operation_coding_system (nargs
+ 1, args2
);
740 if (CONSP (coding_systems
))
741 val
= XCAR (coding_systems
);
742 else if (CONSP (Vdefault_process_coding_system
))
743 val
= XCAR (Vdefault_process_coding_system
);
747 Fcheck_coding_system (val
);
748 /* In unibyte mode, character code conversion should not take
749 place but EOL conversion should. So, setup raw-text or one
750 of the subsidiary according to the information just setup. */
751 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
753 val
= raw_text_coding_system (val
);
754 setup_coding_system (val
, &process_coding
);
755 process_coding
.dst_multibyte
756 = ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
757 process_coding
.src_multibyte
= 0;
765 enum { CALLPROC_BUFFER_SIZE_MIN
= 16 * 1024 };
766 enum { CALLPROC_BUFFER_SIZE_MAX
= 4 * CALLPROC_BUFFER_SIZE_MIN
};
767 char buf
[CALLPROC_BUFFER_SIZE_MAX
];
768 int bufsize
= CALLPROC_BUFFER_SIZE_MIN
;
770 EMACS_INT total_read
= 0;
772 bool display_on_the_fly
= display_p
;
773 struct coding_system saved_coding
= process_coding
;
777 /* Repeatedly read until we've filled as much as possible
778 of the buffer size we have. But don't read
779 less than 1024--save that for the next bufferful. */
781 while (nread
< bufsize
- 1024)
783 int this_read
= emacs_read (fd0
, buf
+ nread
,
791 process_coding
.mode
|= CODING_MODE_LAST_BLOCK
;
796 total_read
+= this_read
;
798 if (display_on_the_fly
)
802 /* Now NREAD is the total amount of data in the buffer. */
807 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
808 && ! CODING_MAY_REQUIRE_DECODING (&process_coding
))
809 insert_1_both (buf
, nread
, nread
, 0, 1, 0);
811 { /* We have to decode the input. */
815 XSETBUFFER (curbuf
, current_buffer
);
816 /* FIXME: Call signal_after_change! */
817 prepare_to_modify_buffer (PT
, PT
, NULL
);
818 /* We cannot allow after-change-functions be run
819 during decoding, because that might modify the
820 buffer, while we rely on process_coding.produced to
821 faithfully reflect inserted text until we
822 TEMP_SET_PT_BOTH below. */
823 specbind (Qinhibit_modification_hooks
, Qt
);
824 decode_coding_c_string (&process_coding
,
825 (unsigned char *) buf
, nread
, curbuf
);
827 if (display_on_the_fly
828 && CODING_REQUIRE_DETECTION (&saved_coding
)
829 && ! CODING_REQUIRE_DETECTION (&process_coding
))
831 /* We have detected some coding system, but the
832 detection may have been via insufficient data.
833 So give up displaying on the fly. */
834 if (process_coding
.produced
> 0)
835 del_range_2 (process_coding
.dst_pos
,
836 process_coding
.dst_pos_byte
,
837 (process_coding
.dst_pos
838 + process_coding
.produced_char
),
839 (process_coding
.dst_pos_byte
840 + process_coding
.produced
),
842 display_on_the_fly
= 0;
843 process_coding
= saved_coding
;
845 /* Make the above condition always fail in the future. */
846 saved_coding
.common_flags
847 &= ~CODING_REQUIRE_DETECTION_MASK
;
851 TEMP_SET_PT_BOTH (PT
+ process_coding
.produced_char
,
852 PT_BYTE
+ process_coding
.produced
);
853 carryover
= process_coding
.carryover_bytes
;
855 memcpy (buf
, process_coding
.carryover
,
856 process_coding
.carryover_bytes
);
859 if (process_coding
.mode
& CODING_MODE_LAST_BLOCK
)
862 /* Make the buffer bigger as we continue to read more data,
863 but not past CALLPROC_BUFFER_SIZE_MAX. */
864 if (bufsize
< CALLPROC_BUFFER_SIZE_MAX
&& total_read
> 32 * bufsize
)
865 if ((bufsize
*= 2) > CALLPROC_BUFFER_SIZE_MAX
)
866 bufsize
= CALLPROC_BUFFER_SIZE_MAX
;
870 redisplay_preserve_echo_area (1);
871 /* This variable might have been set to 0 for code
872 detection. In that case, set it back to 1 because
873 we should have already detected a coding system. */
874 display_on_the_fly
= 1;
881 Vlast_coding_system_used
= CODING_ID_NAME (process_coding
.id
);
882 /* If the caller required, let the buffer inherit the
883 coding-system used to decode the process output. */
884 if (inherit_process_coding_system
)
885 call1 (intern ("after-insert-file-set-buffer-file-coding-system"),
886 make_number (total_read
));
890 /* Wait for it to terminate, unless it already has. */
891 wait_for_termination (pid
, &status
, fd0
< 0);
896 /* Don't kill any children that the subprocess may have left behind
898 synch_process_pid
= 0;
903 if (WIFSIGNALED (status
))
907 synchronize_system_messages_locale ();
908 signame
= strsignal (WTERMSIG (status
));
913 return code_convert_string_norecord (build_string (signame
),
914 Vlocale_coding_system
, 0);
917 eassert (WIFEXITED (status
));
918 return make_number (WEXITSTATUS (status
));
921 /* Create a temporary file suitable for storing the input data of
922 call-process-region. NARGS and ARGS are the same as for
923 call-process-region. Store into *FILENAME_STRING_PTR a Lisp string
924 naming the file, and return a file descriptor for reading.
925 Unwind-protect the file, so that the file descriptor will be closed
926 and the file removed when the caller unwinds the specpdl stack. */
929 create_temp_file (ptrdiff_t nargs
, Lisp_Object
*args
,
930 Lisp_Object
*filename_string_ptr
, int *fdp
)
934 Lisp_Object filename_string
;
935 Lisp_Object val
, start
, end
;
938 if (STRINGP (Vtemporary_file_directory
))
939 tmpdir
= Vtemporary_file_directory
;
944 outf
= getenv ("TMPDIR");
945 tmpdir
= build_string (outf
? outf
: "/tmp/");
947 if ((outf
= egetenv ("TMPDIR"))
948 || (outf
= egetenv ("TMP"))
949 || (outf
= egetenv ("TEMP")))
950 tmpdir
= build_string (outf
);
952 tmpdir
= Ffile_name_as_directory (build_string ("c:/temp"));
957 Lisp_Object pattern
= Fexpand_file_name (Vtemp_file_name_pattern
, tmpdir
);
962 /* Cannot use the result of Fexpand_file_name, because it
963 downcases the XXXXXX part of the pattern, and mktemp then
964 doesn't recognize it. */
965 if (!NILP (Vw32_downcase_file_names
))
967 Lisp_Object dirname
= Ffile_name_directory (pattern
);
970 pattern
= Vtemp_file_name_pattern
;
972 pattern
= concat2 (dirname
, Vtemp_file_name_pattern
);
976 filename_string
= Fcopy_sequence (ENCODE_FILE (pattern
));
977 GCPRO1 (filename_string
);
978 tempfile
= SSDATA (filename_string
);
980 fd
= mkostemp (tempfile
, O_CLOEXEC
);
982 report_file_error ("Failed to open temporary file using pattern",
985 *filename_string_ptr
= filename_string
;
986 record_unwind_protect (delete_temp_file_ptr
, filename_string_ptr
);
987 record_unwind_protect_ptr (close_file_ptr_unwind
, fdp
);
992 /* Decide coding-system of the contents of the temporary file. */
993 if (!NILP (Vcoding_system_for_write
))
994 val
= Vcoding_system_for_write
;
995 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
999 Lisp_Object coding_systems
;
1002 SAFE_NALLOCA (args2
, 1, nargs
+ 1);
1003 args2
[0] = Qcall_process_region
;
1004 memcpy (args2
+ 1, args
, nargs
* sizeof *args
);
1005 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1006 val
= CONSP (coding_systems
) ? XCDR (coding_systems
) : Qnil
;
1009 val
= complement_process_encoding_system (val
);
1014 specbind (intern ("coding-system-for-write"), val
);
1015 /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we
1016 happen to get a ".Z" suffix. */
1017 specbind (intern ("file-name-handler-alist"), Qnil
);
1018 write_region (start
, end
, filename_string
, Qnil
, Qlambda
, Qnil
, Qnil
, fd
);
1023 if (lseek (fd
, 0, SEEK_SET
) < 0)
1024 report_file_error ("Setting file position", filename_string
);
1026 /* Note that Fcall_process takes care of binding
1027 coding-system-for-read. */
1032 DEFUN ("call-process-region", Fcall_process_region
, Scall_process_region
,
1034 doc
: /* Send text from START to END to a synchronous process running PROGRAM.
1035 The remaining arguments are optional.
1036 Delete the text if fourth arg DELETE is non-nil.
1038 Insert output in BUFFER before point; t means current buffer; nil for
1039 BUFFER means discard it; 0 means discard and don't wait; and `(:file
1040 FILE)', where FILE is a file name string, means that it should be
1041 written to that file (if the file already exists it is overwritten).
1042 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
1043 REAL-BUFFER says what to do with standard output, as above,
1044 while STDERR-FILE says what to do with standard error in the child.
1045 STDERR-FILE may be nil (discard standard error output),
1046 t (mix it with ordinary output), or a file name string.
1048 Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.
1049 Remaining args are passed to PROGRAM at startup as command args.
1051 If BUFFER is 0, `call-process-region' returns immediately with value nil.
1052 Otherwise it waits for PROGRAM to terminate
1053 and returns a numeric exit status or a signal description string.
1054 If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
1056 usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */)
1057 (ptrdiff_t nargs
, Lisp_Object
*args
)
1059 struct gcpro gcpro1
;
1060 Lisp_Object infile
, val
;
1062 Lisp_Object start
= args
[0];
1063 Lisp_Object end
= args
[1];
1067 if (STRINGP (start
))
1068 empty_input
= SCHARS (start
) == 0;
1069 else if (NILP (start
))
1070 empty_input
= BEG
== Z
;
1073 validate_region (&args
[0], &args
[1]);
1076 empty_input
= XINT (start
) == XINT (end
);
1080 create_temp_file (nargs
, args
, &infile
, &fd
);
1084 fd
= emacs_open (NULL_DEVICE
, O_RDONLY
, 0);
1086 report_file_error ("Opening null device", Qnil
);
1087 record_unwind_protect_ptr (close_file_ptr_unwind
, &fd
);
1092 if (nargs
> 3 && !NILP (args
[3]))
1093 Fdelete_region (start
, end
);
1107 val
= call_process (nargs
, args
, &fd
, &infile
);
1113 static int relocate_fd (int fd
, int minfd
);
1117 add_env (char **env
, char **new_env
, char *string
)
1124 /* See if this string duplicates any string already in the env.
1125 If so, don't put it in.
1126 When an env var has multiple definitions,
1127 we keep the definition that comes first in process-environment. */
1128 for (ep
= env
; ok
&& ep
!= new_env
; ep
++)
1130 char *p
= *ep
, *q
= string
;
1136 /* The string is a lone variable name; keep it for now, we
1137 will remove it later. It is a placeholder for a
1138 variable that is not to be included in the environment. */
1146 *new_env
++ = string
;
1150 /* This is the last thing run in a newly forked inferior
1151 either synchronous or asynchronous.
1152 Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2.
1153 Initialize inferior's priority, pgrp, connected dir and environment.
1154 then exec another program based on new_argv.
1156 If SET_PGRP, put the subprocess into a separate process group.
1158 CURRENT_DIR is an elisp string giving the path of the current
1159 directory the subprocess should have. Since we can't really signal
1160 a decent error from within the child, this should be verified as an
1161 executable directory by the parent. */
1164 child_setup (int in
, int out
, int err
, char **new_argv
, bool set_pgrp
,
1165 Lisp_Object current_dir
)
1175 pid_t pid
= getpid ();
1176 #endif /* WINDOWSNT */
1178 /* Note that use of alloca is always safe here. It's obvious for systems
1179 that do not have true vfork or that have true (stack) alloca.
1180 If using vfork and C_ALLOCA (when Emacs used to include
1181 src/alloca.c) it is safe because that changes the superior's
1182 static variables as if the superior had done alloca and will be
1183 cleaned up in the usual way. */
1188 i
= SBYTES (current_dir
);
1190 /* MSDOS must have all environment variables malloc'ed, because
1191 low-level libc functions that launch subsidiary processes rely
1193 pwd_var
= xmalloc (i
+ 5);
1195 pwd_var
= alloca (i
+ 5);
1198 memcpy (pwd_var
, "PWD=", 4);
1199 strcpy (temp
, SSDATA (current_dir
));
1202 /* We can't signal an Elisp error here; we're in a vfork. Since
1203 the callers check the current directory before forking, this
1204 should only return an error if the directory's permissions
1205 are changed between the check and this chdir, but we should
1207 if (chdir (temp
) < 0)
1208 _exit (EXIT_CANCELED
);
1210 /* Get past the drive letter, so that d:/ is left alone. */
1211 if (i
> 2 && IS_DEVICE_SEP (temp
[1]) && IS_DIRECTORY_SEP (temp
[2]))
1218 /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */
1219 while (i
> 2 && IS_DIRECTORY_SEP (temp
[i
- 1]))
1223 /* Set `env' to a vector of the strings in the environment. */
1225 register Lisp_Object tem
;
1226 register char **new_env
;
1228 register int new_length
;
1229 Lisp_Object display
= Qnil
;
1233 for (tem
= Vprocess_environment
;
1234 CONSP (tem
) && STRINGP (XCAR (tem
));
1237 if (strncmp (SSDATA (XCAR (tem
)), "DISPLAY", 7) == 0
1238 && (SDATA (XCAR (tem
)) [7] == '\0'
1239 || SDATA (XCAR (tem
)) [7] == '='))
1240 /* DISPLAY is specified in process-environment. */
1245 /* If not provided yet, use the frame's DISPLAY. */
1248 Lisp_Object tmp
= Fframe_parameter (selected_frame
, Qdisplay
);
1249 if (!STRINGP (tmp
) && CONSP (Vinitial_environment
))
1250 /* If still not found, Look for DISPLAY in Vinitial_environment. */
1251 tmp
= Fgetenv_internal (build_string ("DISPLAY"),
1252 Vinitial_environment
);
1260 /* new_length + 2 to include PWD and terminating 0. */
1261 env
= new_env
= alloca ((new_length
+ 2) * sizeof *env
);
1262 /* If we have a PWD envvar, pass one down,
1263 but with corrected value. */
1264 if (egetenv ("PWD"))
1265 *new_env
++ = pwd_var
;
1267 if (STRINGP (display
))
1269 char *vdata
= alloca (sizeof "DISPLAY=" + SBYTES (display
));
1270 strcpy (vdata
, "DISPLAY=");
1271 strcat (vdata
, SSDATA (display
));
1272 new_env
= add_env (env
, new_env
, vdata
);
1276 for (tem
= Vprocess_environment
;
1277 CONSP (tem
) && STRINGP (XCAR (tem
));
1279 new_env
= add_env (env
, new_env
, SSDATA (XCAR (tem
)));
1283 /* Remove variable names without values. */
1287 while (*q
!= 0 && strchr (*q
, '=') == NULL
)
1297 prepare_standard_handles (in
, out
, err
, handles
);
1298 set_process_dir (SDATA (current_dir
));
1299 /* Spawn the child. (See w32proc.c:sys_spawnve). */
1300 cpid
= spawnve (_P_NOWAIT
, new_argv
[0], new_argv
, env
);
1301 reset_standard_handles (in
, out
, err
, handles
);
1303 /* An error occurred while trying to spawn the process. */
1304 report_file_error ("Spawning child process", Qnil
);
1307 #else /* not WINDOWSNT */
1308 /* Make sure that in, out, and err are not actually already in
1309 descriptors zero, one, or two; this could happen if Emacs is
1310 started with its standard in, out, or error closed, as might
1313 int oin
= in
, oout
= out
;
1315 /* We have to avoid relocating the same descriptor twice! */
1317 in
= relocate_fd (in
, 3);
1322 out
= relocate_fd (out
, 3);
1326 else if (err
== oout
)
1329 err
= relocate_fd (err
, 3);
1333 /* Redirect file descriptors and clear the close-on-exec flag on the
1334 redirected ones. IN, OUT, and ERR are close-on-exec so they
1335 need not be closed explicitly. */
1343 execve (new_argv
[0], new_argv
, env
);
1346 /* Avoid deadlock if the child's perror writes to a full pipe; the
1347 pipe's reader is the parent, but with vfork the parent can't
1348 run until the child exits. Truncate the diagnostic instead. */
1349 fcntl (STDERR_FILENO
, F_SETFL
, O_NONBLOCK
);
1352 emacs_perror (new_argv
[0]);
1353 _exit (exec_errno
== ENOENT
? EXIT_ENOENT
: EXIT_CANNOT_INVOKE
);
1356 pid
= run_msdos_command (new_argv
, pwd_var
+ 4, in
, out
, err
, env
);
1359 /* An error occurred while trying to run the subprocess. */
1360 report_file_error ("Spawning child process", Qnil
);
1363 #endif /* not WINDOWSNT */
1367 /* Move the file descriptor FD so that its number is not less than MINFD.
1368 If the file descriptor is moved at all, the original is closed on MSDOS,
1369 but not elsewhere as the caller will close it anyway. */
1371 relocate_fd (int fd
, int minfd
)
1377 int new = fcntl (fd
, F_DUPFD_CLOEXEC
, minfd
);
1380 emacs_perror ("while setting up child");
1381 _exit (EXIT_CANCELED
);
1389 #endif /* not WINDOWSNT */
1392 getenv_internal_1 (const char *var
, ptrdiff_t varlen
, char **value
,
1393 ptrdiff_t *valuelen
, Lisp_Object env
)
1395 for (; CONSP (env
); env
= XCDR (env
))
1397 Lisp_Object entry
= XCAR (env
);
1399 && SBYTES (entry
) >= varlen
1401 /* NT environment variables are case insensitive. */
1402 && ! strnicmp (SDATA (entry
), var
, varlen
)
1403 #else /* not WINDOWSNT */
1404 && ! memcmp (SDATA (entry
), var
, varlen
)
1405 #endif /* not WINDOWSNT */
1408 if (SBYTES (entry
) > varlen
&& SREF (entry
, varlen
) == '=')
1410 *value
= SSDATA (entry
) + (varlen
+ 1);
1411 *valuelen
= SBYTES (entry
) - (varlen
+ 1);
1414 else if (SBYTES (entry
) == varlen
)
1416 /* Lone variable names in Vprocess_environment mean that
1417 variable should be removed from the environment. */
1427 getenv_internal (const char *var
, ptrdiff_t varlen
, char **value
,
1428 ptrdiff_t *valuelen
, Lisp_Object frame
)
1430 /* Try to find VAR in Vprocess_environment first. */
1431 if (getenv_internal_1 (var
, varlen
, value
, valuelen
,
1432 Vprocess_environment
))
1433 return *value
? 1 : 0;
1435 /* For DISPLAY try to get the values from the frame or the initial env. */
1436 if (strcmp (var
, "DISPLAY") == 0)
1439 = Fframe_parameter (NILP (frame
) ? selected_frame
: frame
, Qdisplay
);
1440 if (STRINGP (display
))
1442 *value
= SSDATA (display
);
1443 *valuelen
= SBYTES (display
);
1446 /* If still not found, Look for DISPLAY in Vinitial_environment. */
1447 if (getenv_internal_1 (var
, varlen
, value
, valuelen
,
1448 Vinitial_environment
))
1449 return *value
? 1 : 0;
1455 DEFUN ("getenv-internal", Fgetenv_internal
, Sgetenv_internal
, 1, 2, 0,
1456 doc
: /* Get the value of environment variable VARIABLE.
1457 VARIABLE should be a string. Value is nil if VARIABLE is undefined in
1458 the environment. Otherwise, value is a string.
1460 This function searches `process-environment' for VARIABLE.
1462 If optional parameter ENV is a list, then search this list instead of
1463 `process-environment', and return t when encountering a negative entry
1464 \(an entry for a variable with no value). */)
1465 (Lisp_Object variable
, Lisp_Object env
)
1470 CHECK_STRING (variable
);
1473 if (getenv_internal_1 (SSDATA (variable
), SBYTES (variable
),
1474 &value
, &valuelen
, env
))
1475 return value
? make_string (value
, valuelen
) : Qt
;
1479 else if (getenv_internal (SSDATA (variable
), SBYTES (variable
),
1480 &value
, &valuelen
, env
))
1481 return make_string (value
, valuelen
);
1486 /* A version of getenv that consults the Lisp environment lists,
1487 easily callable from C. */
1489 egetenv (const char *var
)
1494 if (getenv_internal (var
, strlen (var
), &value
, &valuelen
, Qnil
))
1501 /* This is run before init_cmdargs. */
1504 init_callproc_1 (void)
1507 const char *etc_dir
= ns_etc_directory ();
1508 const char *path_exec
= ns_exec_path ();
1511 Vdata_directory
= decode_env_path ("EMACSDATA",
1516 Vdata_directory
= Ffile_name_as_directory (Fcar (Vdata_directory
));
1518 Vdoc_directory
= decode_env_path ("EMACSDOC",
1523 Vdoc_directory
= Ffile_name_as_directory (Fcar (Vdoc_directory
));
1525 /* Check the EMACSPATH environment variable, defaulting to the
1526 PATH_EXEC path from epaths.h. */
1527 Vexec_path
= decode_env_path ("EMACSPATH",
1529 path_exec
? path_exec
:
1532 Vexec_directory
= Ffile_name_as_directory (Fcar (Vexec_path
));
1533 /* FIXME? For ns, path_exec should go at the front? */
1534 Vexec_path
= nconc2 (decode_env_path ("PATH", "", 0), Vexec_path
);
1537 /* This is run after init_cmdargs, when Vinstallation_directory is valid. */
1540 init_callproc (void)
1542 char *data_dir
= egetenv ("EMACSDATA");
1545 Lisp_Object tempdir
;
1549 const char *etc_dir
= ns_etc_directory ();
1552 data_dir
= alloca (strlen (etc_dir
) + 1);
1553 strcpy (data_dir
, etc_dir
);
1558 if (!NILP (Vinstallation_directory
))
1560 /* Add to the path the lib-src subdir of the installation dir. */
1562 tem
= Fexpand_file_name (build_string ("lib-src"),
1563 Vinstallation_directory
);
1565 /* MSDOS uses wrapped binaries, so don't do this. */
1566 if (NILP (Fmember (tem
, Vexec_path
)))
1569 const char *path_exec
= ns_exec_path ();
1571 Vexec_path
= decode_env_path ("EMACSPATH",
1573 path_exec
? path_exec
:
1576 Vexec_path
= Fcons (tem
, Vexec_path
);
1577 Vexec_path
= nconc2 (decode_env_path ("PATH", "", 0), Vexec_path
);
1580 Vexec_directory
= Ffile_name_as_directory (tem
);
1581 #endif /* not MSDOS */
1583 /* Maybe use ../etc as well as ../lib-src. */
1586 tem
= Fexpand_file_name (build_string ("etc"),
1587 Vinstallation_directory
);
1588 Vdoc_directory
= Ffile_name_as_directory (tem
);
1592 /* Look for the files that should be in etc. We don't use
1593 Vinstallation_directory, because these files are never installed
1594 near the executable, and they are never in the build
1595 directory when that's different from the source directory.
1597 Instead, if these files are not in the nominal place, we try the
1598 source directory. */
1601 Lisp_Object tem
, tem1
, srcdir
;
1602 Lisp_Object lispdir
= Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH
, 0));
1604 srcdir
= Fexpand_file_name (build_string ("../src/"), lispdir
);
1606 tem
= Fexpand_file_name (build_string ("NEWS"), Vdata_directory
);
1607 tem1
= Ffile_exists_p (tem
);
1608 if (!NILP (Fequal (srcdir
, Vinvocation_directory
)) || NILP (tem1
))
1611 newdir
= Fexpand_file_name (build_string ("../etc/"), lispdir
);
1612 tem
= Fexpand_file_name (build_string ("NEWS"), newdir
);
1613 tem1
= Ffile_exists_p (tem
);
1615 Vdata_directory
= newdir
;
1623 tempdir
= Fdirectory_file_name (Vexec_directory
);
1624 if (! file_accessible_directory_p (SSDATA (tempdir
)))
1625 dir_warning ("arch-dependent data dir", Vexec_directory
);
1628 tempdir
= Fdirectory_file_name (Vdata_directory
);
1629 if (! file_accessible_directory_p (SSDATA (tempdir
)))
1630 dir_warning ("arch-independent data dir", Vdata_directory
);
1632 sh
= getenv ("SHELL");
1633 Vshell_file_name
= build_string (sh
? sh
: "/bin/sh");
1636 Vshared_game_score_directory
= Qnil
;
1638 Vshared_game_score_directory
= build_unibyte_string (PATH_GAME
);
1639 if (NILP (Ffile_accessible_directory_p (Vshared_game_score_directory
)))
1640 Vshared_game_score_directory
= Qnil
;
1645 set_initial_environment (void)
1648 for (envp
= environ
; *envp
; envp
++)
1649 Vprocess_environment
= Fcons (build_string (*envp
),
1650 Vprocess_environment
);
1651 /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent
1652 to use `delete' and friends on process-environment. */
1653 Vinitial_environment
= Fcopy_sequence (Vprocess_environment
);
1657 syms_of_callproc (void)
1659 #include "callproc.x"
1662 Vtemp_file_name_pattern
= build_string ("emacsXXXXXX");
1664 Vtemp_file_name_pattern
= build_string ("emXXXXXX");
1666 staticpro (&Vtemp_file_name_pattern
);
1668 synch_process_tempfile
= make_number (0);
1669 staticpro (&synch_process_tempfile
);
1671 DEFVAR_LISP ("shell-file-name", Vshell_file_name
,
1672 doc
: /* File name to load inferior shells from.
1673 Initialized from the SHELL environment variable, or to a system-dependent
1674 default if SHELL is not set. */);
1676 DEFVAR_LISP ("exec-path", Vexec_path
,
1677 doc
: /* List of directories to search programs to run in subprocesses.
1678 Each element is a string (directory name) or nil (try default directory).
1680 By default the last element of this list is `exec-directory'. The
1681 last element is not always used, for example in shell completion
1682 (`shell-dynamic-complete-command'). */);
1684 DEFVAR_LISP ("exec-suffixes", Vexec_suffixes
,
1685 doc
: /* List of suffixes to try to find executable file names.
1686 Each element is a string. */);
1687 Vexec_suffixes
= Qnil
;
1689 DEFVAR_LISP ("exec-directory", Vexec_directory
,
1690 doc
: /* Directory for executables for Emacs to invoke.
1691 More generally, this includes any architecture-dependent files
1692 that are built and installed from the Emacs distribution. */);
1694 DEFVAR_LISP ("data-directory", Vdata_directory
,
1695 doc
: /* Directory of machine-independent files that come with GNU Emacs.
1696 These are files intended for Emacs to use while it runs. */);
1698 DEFVAR_LISP ("doc-directory", Vdoc_directory
,
1699 doc
: /* Directory containing the DOC file that comes with GNU Emacs.
1700 This is usually the same as `data-directory'. */);
1702 DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory
,
1703 doc
: /* For internal use by the build procedure only.
1704 This is the name of the directory in which the build procedure installed
1705 Emacs's info files; the default value for `Info-default-directory-list'
1707 Vconfigure_info_directory
= build_string (PATH_INFO
);
1709 DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory
,
1710 doc
: /* Directory of score files for games which come with GNU Emacs.
1711 If this variable is nil, then Emacs is unable to use a shared directory. */);
1713 Vshared_game_score_directory
= Qnil
;
1715 Vshared_game_score_directory
= build_string (PATH_GAME
);
1718 DEFVAR_LISP ("initial-environment", Vinitial_environment
,
1719 doc
: /* List of environment variables inherited from the parent process.
1720 Each element should be a string of the form ENVVARNAME=VALUE.
1721 The elements must normally be decoded (using `locale-coding-system') for use. */);
1722 Vinitial_environment
= Qnil
;
1724 DEFVAR_LISP ("process-environment", Vprocess_environment
,
1725 doc
: /* List of overridden environment variables for subprocesses to inherit.
1726 Each element should be a string of the form ENVVARNAME=VALUE.
1728 Entries in this list take precedence to those in the frame-local
1729 environments. Therefore, let-binding `process-environment' is an easy
1730 way to temporarily change the value of an environment variable,
1731 irrespective of where it comes from. To use `process-environment' to
1732 remove an environment variable, include only its name in the list,
1735 This variable is set to nil when Emacs starts.
1737 If multiple entries define the same variable, the first one always
1740 Non-ASCII characters are encoded according to the initial value of
1741 `locale-coding-system', i.e. the elements must normally be decoded for
1744 See `setenv' and `getenv'. */);
1745 Vprocess_environment
= Qnil
;