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 /* If a string, the name of a temp file that has not been removed. */
87 static Lisp_Object synch_process_tempfile
;
89 # define synch_process_tempfile make_number (0)
92 /* Indexes of file descriptors that need closing on call_process_kill. */
95 /* The subsidiary process's stdout and stderr. stdin is handled
96 separately, in either Fcall_process_region or create_temp_file. */
97 CALLPROC_STDOUT
, CALLPROC_STDERR
,
99 /* How to read from a pipe (or substitute) from the subsidiary process. */
102 /* A bound on the number of file descriptors. */
106 static Lisp_Object
call_process (ptrdiff_t, Lisp_Object
*, int, ptrdiff_t);
111 block_child_signal (sigset_t
*oldset
)
114 sigemptyset (&blocked
);
115 sigaddset (&blocked
, SIGCHLD
);
116 pthread_sigmask (SIG_BLOCK
, &blocked
, oldset
);
119 /* Unblock SIGCHLD. */
122 unblock_child_signal (sigset_t
const *oldset
)
124 pthread_sigmask (SIG_SETMASK
, oldset
, 0);
127 /* Return the current buffer's working directory, or the home
128 directory if it's unreachable, as a string suitable for a system call.
129 Signal an error if the result would not be an accessible directory. */
132 encode_current_directory (void)
137 dir
= BVAR (current_buffer
, directory
);
140 dir
= Funhandled_file_name_directory (dir
);
142 /* If the file name handler says that dir is unreachable, use
143 a sensible default. */
145 dir
= build_string ("~");
147 dir
= expand_and_dir_to_file (dir
, Qnil
);
149 if (STRING_MULTIBYTE (dir
))
150 dir
= ENCODE_FILE (dir
);
151 if (! file_accessible_directory_p (SSDATA (dir
)))
152 report_file_error ("Setting current directory",
153 BVAR (current_buffer
, directory
));
155 RETURN_UNGCPRO (dir
);
158 /* If P is reapable, record it as a deleted process and kill it.
159 Do this in a critical section. Unless PID is wedged it will be
160 reaped on receipt of the first SIGCHLD after the critical section. */
163 record_kill_process (struct Lisp_Process
*p
, Lisp_Object tempfile
)
166 block_child_signal (&oldset
);
170 record_deleted_pid (p
->pid
, tempfile
);
172 kill (- p
->pid
, SIGKILL
);
175 unblock_child_signal (&oldset
);
178 /* Clean up files, file descriptors and processes created by Fcall_process. */
181 delete_temp_file (Lisp_Object name
)
183 unlink (SSDATA (name
));
187 call_process_kill (void *ptr
)
189 int *callproc_fd
= ptr
;
191 for (i
= 0; i
< CALLPROC_FDS
; i
++)
192 if (0 <= callproc_fd
[i
])
193 emacs_close (callproc_fd
[i
]);
195 if (synch_process_pid
)
197 struct Lisp_Process proc
;
199 proc
.pid
= synch_process_pid
;
200 record_kill_process (&proc
, synch_process_tempfile
);
201 synch_process_pid
= 0;
203 else if (STRINGP (synch_process_tempfile
))
204 delete_temp_file (synch_process_tempfile
);
207 /* Clean up when exiting Fcall_process: restore the buffer, and
208 kill the subsidiary process group if the process still exists. */
211 call_process_cleanup (Lisp_Object buffer
)
213 Fset_buffer (buffer
);
215 if (synch_process_pid
)
217 kill (-synch_process_pid
, SIGINT
);
218 message1 ("Waiting for process to die...(type C-g again to kill it instantly)");
221 wait_for_termination (synch_process_pid
, 0, 1);
222 synch_process_pid
= 0;
224 message1 ("Waiting for process to die...done");
229 static mode_t
const default_output_mode
= S_IREAD
| S_IWRITE
;
231 static mode_t
const default_output_mode
= 0666;
234 DEFUN ("call-process", Fcall_process
, Scall_process
, 1, MANY
, 0,
235 doc
: /* Call PROGRAM synchronously in separate process.
236 The remaining arguments are optional.
237 The program's input comes from file INFILE (nil means `/dev/null').
238 Insert output in DESTINATION before point; t means current buffer; nil for DESTINATION
239 means discard it; 0 means discard and don't wait; and `(:file FILE)', where
240 FILE is a file name string, means that it should be written to that file
241 \(if the file already exists it is overwritten).
242 DESTINATION can also have the form (REAL-BUFFER STDERR-FILE); in that case,
243 REAL-BUFFER says what to do with standard output, as above,
244 while STDERR-FILE says what to do with standard error in the child.
245 STDERR-FILE may be nil (discard standard error output),
246 t (mix it with ordinary output), or a file name string.
248 Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.
249 Remaining arguments are strings passed as command arguments to PROGRAM.
251 If executable PROGRAM can't be found as an executable, `call-process'
252 signals a Lisp error. `call-process' reports errors in execution of
253 the program only through its return and output.
255 If DESTINATION is 0, `call-process' returns immediately with value nil.
256 Otherwise it waits for PROGRAM to terminate
257 and returns a numeric exit status or a signal description string.
258 If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
260 usage: (call-process PROGRAM &optional INFILE DESTINATION DISPLAY &rest ARGS) */)
261 (ptrdiff_t nargs
, Lisp_Object
*args
)
263 Lisp_Object infile
, encoded_infile
;
266 ptrdiff_t count
= SPECPDL_INDEX ();
268 if (nargs
>= 2 && ! NILP (args
[1]))
270 infile
= Fexpand_file_name (args
[1], BVAR (current_buffer
, directory
));
271 CHECK_STRING (infile
);
274 infile
= build_string (NULL_DEVICE
);
277 encoded_infile
= STRING_MULTIBYTE (infile
) ? ENCODE_FILE (infile
) : infile
;
279 filefd
= emacs_open (SSDATA (encoded_infile
), O_RDONLY
, 0);
281 report_file_error ("Opening process input file", infile
);
282 record_unwind_protect_int (close_file_unwind
, filefd
);
284 return unbind_to (count
, call_process (nargs
, args
, filefd
, -1));
287 /* Like Fcall_process (NARGS, ARGS), except use FILEFD as the input file.
289 If TEMPFILE_INDEX is nonnegative, it is the specpdl index of an
290 unwinder that is intended to remove the input temporary file; in
291 this case NARGS must be at least 2 and ARGS[1] is the file's name.
293 At entry, the specpdl stack top entry must be close_file_unwind (FILEFD). */
296 call_process (ptrdiff_t nargs
, Lisp_Object
*args
, int filefd
,
297 ptrdiff_t tempfile_index
)
299 Lisp_Object buffer
, current_dir
, path
;
302 int callproc_fd
[CALLPROC_FDS
];
305 ptrdiff_t count
= SPECPDL_INDEX ();
309 /* File to use for stderr in the child.
310 t means use same as standard output. */
311 Lisp_Object error_file
;
312 Lisp_Object output_file
= Qnil
;
313 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
314 char *tempfile
= NULL
;
321 int fd_output
, fd_error
;
322 struct coding_system process_coding
; /* coding-system of process output */
323 struct coding_system argument_coding
; /* coding-system of arguments */
324 /* Set to the return value of Ffind_operation_coding_system. */
325 Lisp_Object coding_systems
;
328 if (synch_process_pid
)
329 error ("call-process invoked recursively");
331 /* Qt denotes that Ffind_operation_coding_system is not yet called. */
334 CHECK_STRING (args
[0]);
339 /* Without asynchronous processes we cannot have BUFFER == 0. */
341 && (INTEGERP (CONSP (args
[2]) ? XCAR (args
[2]) : args
[2])))
342 error ("Operating system cannot handle asynchronous subprocesses");
343 #endif /* subprocesses */
345 /* Decide the coding-system for giving arguments. */
347 Lisp_Object val
, *args2
;
349 /* If arguments are supplied, we may have to encode them. */
352 bool must_encode
= 0;
353 Lisp_Object coding_attrs
;
355 for (i
= 4; i
< nargs
; i
++)
356 CHECK_STRING (args
[i
]);
358 for (i
= 4; i
< nargs
; i
++)
359 if (STRING_MULTIBYTE (args
[i
]))
362 if (!NILP (Vcoding_system_for_write
))
363 val
= Vcoding_system_for_write
;
364 else if (! must_encode
)
368 SAFE_NALLOCA (args2
, 1, nargs
+ 1);
369 args2
[0] = Qcall_process
;
370 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
371 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
372 val
= CONSP (coding_systems
) ? XCDR (coding_systems
) : Qnil
;
374 val
= complement_process_encoding_system (val
);
375 setup_coding_system (Fcheck_coding_system (val
), &argument_coding
);
376 coding_attrs
= CODING_ID_ATTRS (argument_coding
.id
);
377 if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs
)))
379 /* We should not use an ASCII incompatible coding system. */
380 val
= raw_text_coding_system (val
);
381 setup_coding_system (val
, &argument_coding
);
392 /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT
393 FILE-FOR-STDERR), unless the first element is :file, in which case see
394 the next paragraph. */
395 if (CONSP (buffer
) && !EQ (XCAR (buffer
), QCfile
))
397 if (CONSP (XCDR (buffer
)))
399 Lisp_Object stderr_file
;
400 stderr_file
= XCAR (XCDR (buffer
));
402 if (NILP (stderr_file
) || EQ (Qt
, stderr_file
))
403 error_file
= stderr_file
;
405 error_file
= Fexpand_file_name (stderr_file
, Qnil
);
408 buffer
= XCAR (buffer
);
411 /* If the buffer is (still) a list, it might be a (:file "file") spec. */
412 if (CONSP (buffer
) && EQ (XCAR (buffer
), QCfile
))
414 output_file
= Fexpand_file_name (XCAR (XCDR (buffer
)),
415 BVAR (current_buffer
, directory
));
416 CHECK_STRING (output_file
);
420 if (! (NILP (buffer
) || EQ (buffer
, Qt
) || INTEGERP (buffer
)))
422 Lisp_Object spec_buffer
;
423 spec_buffer
= buffer
;
424 buffer
= Fget_buffer_create (buffer
);
425 /* Mention the buffer name for a better error message. */
427 CHECK_BUFFER (spec_buffer
);
428 CHECK_BUFFER (buffer
);
432 /* Make sure that the child will be able to chdir to the current
433 buffer's current directory, or its unhandled equivalent. We
434 can't just have the child check for an error when it does the
435 chdir, since it's in a vfork.
437 We have to GCPRO around this because Fexpand_file_name,
438 Funhandled_file_name_directory, and Ffile_accessible_directory_p
439 might call a file name handling function. The argument list is
440 protected by the caller, so all we really have to worry about is
443 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
445 current_dir
= encode_current_directory ();
447 GCPRO4 (buffer
, current_dir
, error_file
, output_file
);
449 if (STRINGP (error_file
) && STRING_MULTIBYTE (error_file
))
450 error_file
= ENCODE_FILE (error_file
);
451 if (STRINGP (output_file
) && STRING_MULTIBYTE (output_file
))
452 output_file
= ENCODE_FILE (output_file
);
456 display_p
= INTERACTIVE
&& nargs
>= 4 && !NILP (args
[3]);
458 for (i
= 0; i
< CALLPROC_FDS
; i
++)
461 synch_process_tempfile
= make_number (0);
463 record_unwind_protect_ptr (call_process_kill
, callproc_fd
);
465 /* Search for program; barf if not found. */
467 struct gcpro gcpro1
, gcpro2
, gcpro3
;
470 GCPRO3 (buffer
, current_dir
, error_file
);
471 ok
= openp (Vexec_path
, args
[0], Vexec_suffixes
, &path
,
472 make_number (X_OK
), false);
475 report_file_error ("Searching for program", args
[0]);
478 /* If program file name starts with /: for quoting a magic name,
480 if (SBYTES (path
) > 2 && SREF (path
, 0) == '/'
481 && SREF (path
, 1) == ':')
482 path
= Fsubstring (path
, make_number (2), Qnil
);
484 new_argv
= SAFE_ALLOCA ((nargs
> 4 ? nargs
- 2 : 2) * sizeof *new_argv
);
487 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
489 GCPRO4 (buffer
, current_dir
, path
, error_file
);
494 argument_coding
.dst_multibyte
= 0;
495 for (i
= 4; i
< nargs
; i
++)
497 argument_coding
.src_multibyte
= STRING_MULTIBYTE (args
[i
]);
498 if (CODING_REQUIRE_ENCODING (&argument_coding
))
499 /* We must encode this argument. */
500 args
[i
] = encode_coding_string (&argument_coding
, args
[i
], 1);
502 for (i
= 4; i
< nargs
; i
++)
503 new_argv
[i
- 3] = SSDATA (args
[i
]);
508 if (STRING_MULTIBYTE (path
))
509 path
= ENCODE_FILE (path
);
510 new_argv
[0] = SSDATA (path
);
514 discard_output
= INTEGERP (buffer
) || (NILP (buffer
) && NILP (output_file
));
517 if (! discard_output
&& ! STRINGP (output_file
))
519 char const *tmpdir
= egetenv ("TMPDIR");
520 char const *outf
= tmpdir
? tmpdir
: "";
521 tempfile
= alloca (strlen (outf
) + 20);
522 strcpy (tempfile
, outf
);
523 dostounix_filename (tempfile
, 0);
524 if (*tempfile
== '\0' || tempfile
[strlen (tempfile
) - 1] != '/')
525 strcat (tempfile
, "/");
526 strcat (tempfile
, "detmp.XXX");
529 report_file_error ("Opening process output file", Qnil
);
530 output_file
= build_string (tempfile
);
531 synch_process_tempfile
= output_file
;
537 fd_output
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
539 report_file_error ("Opening null device", Qnil
);
541 else if (STRINGP (output_file
))
543 fd_output
= emacs_open (SSDATA (output_file
),
544 O_WRONLY
| O_CREAT
| O_TRUNC
| O_TEXT
,
545 default_output_mode
);
548 int open_errno
= errno
;
549 output_file
= DECODE_FILE (output_file
);
550 report_file_errno ("Opening process output file",
551 output_file
, open_errno
);
557 if (emacs_pipe (fd
) != 0)
558 report_file_error ("Creating process pipe", Qnil
);
559 callproc_fd
[CALLPROC_PIPEREAD
] = fd
[0];
562 callproc_fd
[CALLPROC_STDOUT
] = fd_output
;
564 fd_error
= fd_output
;
566 if (STRINGP (error_file
) || (NILP (error_file
) && !discard_output
))
568 fd_error
= emacs_open ((STRINGP (error_file
)
569 ? SSDATA (error_file
)
571 O_WRONLY
| O_CREAT
| O_TRUNC
| O_TEXT
,
572 default_output_mode
);
575 int open_errno
= errno
;
576 report_file_errno ("Cannot redirect stderr",
577 (STRINGP (error_file
)
578 ? DECODE_FILE (error_file
)
579 : build_string (NULL_DEVICE
)),
582 callproc_fd
[CALLPROC_STDERR
] = fd_error
;
585 #ifdef MSDOS /* MW, July 1993 */
586 /* Note that on MSDOS `child_setup' actually returns the child process
587 exit status, not its PID, so assign it to status below. */
588 pid
= child_setup (filefd
, fd_output
, fd_error
, new_argv
, 0, current_dir
);
593 unbind_to (count
, Qnil
);
594 synchronize_system_messages_locale ();
596 code_convert_string_norecord (build_string (strerror (child_errno
)),
597 Vlocale_coding_system
, 0);
601 for (i
= 0; i
< CALLPROC_FDS
; i
++)
602 if (0 <= callproc_fd
[i
])
604 emacs_close (callproc_fd
[i
]);
607 emacs_close (filefd
);
608 clear_unwind_protect (count
- 1);
612 /* Since CRLF is converted to LF within `decode_coding', we
613 can always open a file with binary mode. */
614 callproc_fd
[CALLPROC_PIPEREAD
] = emacs_open (tempfile
,
615 O_RDONLY
| O_BINARY
, 0);
616 if (callproc_fd
[CALLPROC_PIPEREAD
] < 0)
618 int open_errno
= errno
;
619 report_file_errno ("Cannot re-open temporary file",
620 build_string (tempfile
), open_errno
);
626 /* Do the unwind-protect now, even though the pid is not known, so
627 that no storage allocation is done in the critical section.
628 The actual PID will be filled in during the critical section. */
629 record_unwind_protect (call_process_cleanup
, Fcurrent_buffer ());
634 block_child_signal (&oldset
);
637 pid
= child_setup (filefd
, fd_output
, fd_error
, new_argv
, 0, current_dir
);
638 #else /* not WINDOWSNT */
640 /* vfork, and prevent local vars from being clobbered by the vfork. */
642 Lisp_Object
volatile buffer_volatile
= buffer
;
643 Lisp_Object
volatile coding_systems_volatile
= coding_systems
;
644 Lisp_Object
volatile current_dir_volatile
= current_dir
;
645 bool volatile display_p_volatile
= display_p
;
646 bool volatile sa_must_free_volatile
= sa_must_free
;
647 int volatile fd_error_volatile
= fd_error
;
648 int volatile filefd_volatile
= filefd
;
649 ptrdiff_t volatile count_volatile
= count
;
650 ptrdiff_t volatile sa_count_volatile
= sa_count
;
651 char **volatile new_argv_volatile
= new_argv
;
652 int volatile callproc_fd_volatile
[CALLPROC_FDS
];
653 for (i
= 0; i
< CALLPROC_FDS
; i
++)
654 callproc_fd_volatile
[i
] = callproc_fd
[i
];
658 buffer
= buffer_volatile
;
659 coding_systems
= coding_systems_volatile
;
660 current_dir
= current_dir_volatile
;
661 display_p
= display_p_volatile
;
662 sa_must_free
= sa_must_free_volatile
;
663 fd_error
= fd_error_volatile
;
664 filefd
= filefd_volatile
;
665 count
= count_volatile
;
666 sa_count
= sa_count_volatile
;
667 new_argv
= new_argv_volatile
;
669 for (i
= 0; i
< CALLPROC_FDS
; i
++)
670 callproc_fd
[i
] = callproc_fd_volatile
[i
];
671 fd_output
= callproc_fd
[CALLPROC_STDOUT
];
676 unblock_child_signal (&oldset
);
680 /* Emacs ignores SIGPIPE, but the child should not. */
681 signal (SIGPIPE
, SIG_DFL
);
682 /* Likewise for SIGPROF. */
684 signal (SIGPROF
, SIG_DFL
);
687 child_setup (filefd
, fd_output
, fd_error
, new_argv
, 0, current_dir
);
690 #endif /* not WINDOWSNT */
696 synch_process_pid
= pid
;
698 if (INTEGERP (buffer
))
700 if (tempfile_index
< 0)
701 record_deleted_pid (pid
, Qnil
);
705 record_deleted_pid (pid
, args
[1]);
706 clear_unwind_protect (tempfile_index
);
708 synch_process_pid
= 0;
712 unblock_child_signal (&oldset
);
715 #endif /* not MSDOS */
718 report_file_errno ("Doing vfork", Qnil
, child_errno
);
720 /* Close our file descriptors, except for callproc_fd[CALLPROC_PIPEREAD]
721 since we will use that to read input from. */
722 for (i
= 0; i
< CALLPROC_FDS
; i
++)
723 if (i
!= CALLPROC_PIPEREAD
&& 0 <= callproc_fd
[i
])
725 emacs_close (callproc_fd
[i
]);
728 emacs_close (filefd
);
729 clear_unwind_protect (count
- 1);
731 if (INTEGERP (buffer
))
732 return unbind_to (count
, Qnil
);
734 if (BUFFERP (buffer
))
735 Fset_buffer (buffer
);
737 fd0
= callproc_fd
[CALLPROC_PIPEREAD
];
741 Lisp_Object val
, *args2
;
744 if (!NILP (Vcoding_system_for_read
))
745 val
= Vcoding_system_for_read
;
748 if (EQ (coding_systems
, Qt
))
752 SAFE_NALLOCA (args2
, 1, nargs
+ 1);
753 args2
[0] = Qcall_process
;
754 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
756 = Ffind_operation_coding_system (nargs
+ 1, args2
);
758 if (CONSP (coding_systems
))
759 val
= XCAR (coding_systems
);
760 else if (CONSP (Vdefault_process_coding_system
))
761 val
= XCAR (Vdefault_process_coding_system
);
765 Fcheck_coding_system (val
);
766 /* In unibyte mode, character code conversion should not take
767 place but EOL conversion should. So, setup raw-text or one
768 of the subsidiary according to the information just setup. */
769 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
771 val
= raw_text_coding_system (val
);
772 setup_coding_system (val
, &process_coding
);
773 process_coding
.dst_multibyte
774 = ! NILP (BVAR (current_buffer
, enable_multibyte_characters
));
775 process_coding
.src_multibyte
= 0;
783 enum { CALLPROC_BUFFER_SIZE_MIN
= 16 * 1024 };
784 enum { CALLPROC_BUFFER_SIZE_MAX
= 4 * CALLPROC_BUFFER_SIZE_MIN
};
785 char buf
[CALLPROC_BUFFER_SIZE_MAX
];
786 int bufsize
= CALLPROC_BUFFER_SIZE_MIN
;
788 EMACS_INT total_read
= 0;
790 bool display_on_the_fly
= display_p
;
791 struct coding_system saved_coding
= process_coding
;
795 /* Repeatedly read until we've filled as much as possible
796 of the buffer size we have. But don't read
797 less than 1024--save that for the next bufferful. */
799 while (nread
< bufsize
- 1024)
801 int this_read
= emacs_read (fd0
, buf
+ nread
,
809 process_coding
.mode
|= CODING_MODE_LAST_BLOCK
;
814 total_read
+= this_read
;
816 if (display_on_the_fly
)
820 /* Now NREAD is the total amount of data in the buffer. */
823 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
824 && ! CODING_MAY_REQUIRE_DECODING (&process_coding
))
825 insert_1_both (buf
, nread
, nread
, 0, 1, 0);
827 { /* We have to decode the input. */
829 ptrdiff_t count1
= SPECPDL_INDEX ();
831 XSETBUFFER (curbuf
, current_buffer
);
832 prepare_to_modify_buffer (PT
, PT
, NULL
);
833 /* We cannot allow after-change-functions be run
834 during decoding, because that might modify the
835 buffer, while we rely on process_coding.produced to
836 faithfully reflect inserted text until we
837 TEMP_SET_PT_BOTH below. */
838 specbind (Qinhibit_modification_hooks
, Qt
);
839 decode_coding_c_string (&process_coding
,
840 (unsigned char *) buf
, nread
, curbuf
);
841 unbind_to (count1
, Qnil
);
842 if (display_on_the_fly
843 && CODING_REQUIRE_DETECTION (&saved_coding
)
844 && ! CODING_REQUIRE_DETECTION (&process_coding
))
846 /* We have detected some coding system, but the
847 detection may have been via insufficient data.
848 So give up displaying on the fly. */
849 if (process_coding
.produced
> 0)
850 del_range_2 (process_coding
.dst_pos
,
851 process_coding
.dst_pos_byte
,
852 (process_coding
.dst_pos
853 + process_coding
.produced_char
),
854 (process_coding
.dst_pos_byte
855 + process_coding
.produced
),
857 display_on_the_fly
= 0;
858 process_coding
= saved_coding
;
860 /* Make the above condition always fail in the future. */
861 saved_coding
.common_flags
862 &= ~CODING_REQUIRE_DETECTION_MASK
;
866 TEMP_SET_PT_BOTH (PT
+ process_coding
.produced_char
,
867 PT_BYTE
+ process_coding
.produced
);
868 carryover
= process_coding
.carryover_bytes
;
870 memcpy (buf
, process_coding
.carryover
,
871 process_coding
.carryover_bytes
);
874 if (process_coding
.mode
& CODING_MODE_LAST_BLOCK
)
877 /* Make the buffer bigger as we continue to read more data,
878 but not past CALLPROC_BUFFER_SIZE_MAX. */
879 if (bufsize
< CALLPROC_BUFFER_SIZE_MAX
&& total_read
> 32 * bufsize
)
880 if ((bufsize
*= 2) > CALLPROC_BUFFER_SIZE_MAX
)
881 bufsize
= CALLPROC_BUFFER_SIZE_MAX
;
885 redisplay_preserve_echo_area (1);
886 /* This variable might have been set to 0 for code
887 detection. In that case, set it back to 1 because
888 we should have already detected a coding system. */
889 display_on_the_fly
= 1;
896 Vlast_coding_system_used
= CODING_ID_NAME (process_coding
.id
);
897 /* If the caller required, let the buffer inherit the
898 coding-system used to decode the process output. */
899 if (inherit_process_coding_system
)
900 call1 (intern ("after-insert-file-set-buffer-file-coding-system"),
901 make_number (total_read
));
905 /* Wait for it to terminate, unless it already has. */
906 wait_for_termination (pid
, &status
, fd0
< 0);
911 /* Don't kill any children that the subprocess may have left behind
913 synch_process_pid
= 0;
916 unbind_to (count
, Qnil
);
918 if (WIFSIGNALED (status
))
922 synchronize_system_messages_locale ();
923 signame
= strsignal (WTERMSIG (status
));
928 return code_convert_string_norecord (build_string (signame
),
929 Vlocale_coding_system
, 0);
932 eassert (WIFEXITED (status
));
933 return make_number (WEXITSTATUS (status
));
936 /* Create a temporary file suitable for storing the input data of
937 call-process-region. NARGS and ARGS are the same as for
938 call-process-region. Store into *FILENAME_STRING_PTR a Lisp string
939 naming the file, and return a file descriptor for reading.
940 Unwind-protect the file, so that the file descriptor will be closed
941 and the file removed when the caller unwinds the specpdl stack. */
944 create_temp_file (ptrdiff_t nargs
, Lisp_Object
*args
,
945 Lisp_Object
*filename_string_ptr
)
949 Lisp_Object filename_string
;
950 Lisp_Object val
, start
, end
;
953 if (STRINGP (Vtemporary_file_directory
))
954 tmpdir
= Vtemporary_file_directory
;
959 outf
= getenv ("TMPDIR");
960 tmpdir
= build_string (outf
? outf
: "/tmp/");
962 if ((outf
= egetenv ("TMPDIR"))
963 || (outf
= egetenv ("TMP"))
964 || (outf
= egetenv ("TEMP")))
965 tmpdir
= build_string (outf
);
967 tmpdir
= Ffile_name_as_directory (build_string ("c:/temp"));
972 Lisp_Object pattern
= Fexpand_file_name (Vtemp_file_name_pattern
, tmpdir
);
977 /* Cannot use the result of Fexpand_file_name, because it
978 downcases the XXXXXX part of the pattern, and mktemp then
979 doesn't recognize it. */
980 if (!NILP (Vw32_downcase_file_names
))
982 Lisp_Object dirname
= Ffile_name_directory (pattern
);
985 pattern
= Vtemp_file_name_pattern
;
987 pattern
= concat2 (dirname
, Vtemp_file_name_pattern
);
991 filename_string
= Fcopy_sequence (ENCODE_FILE (pattern
));
992 GCPRO1 (filename_string
);
993 tempfile
= SSDATA (filename_string
);
995 count
= SPECPDL_INDEX ();
996 record_unwind_protect_nothing ();
997 fd
= mkostemp (tempfile
, O_CLOEXEC
);
999 report_file_error ("Failed to open temporary file using pattern",
1001 set_unwind_protect (count
, delete_temp_file
, filename_string
);
1002 record_unwind_protect_int (close_file_unwind
, fd
);
1007 /* Decide coding-system of the contents of the temporary file. */
1008 if (!NILP (Vcoding_system_for_write
))
1009 val
= Vcoding_system_for_write
;
1010 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
1014 Lisp_Object coding_systems
;
1017 SAFE_NALLOCA (args2
, 1, nargs
+ 1);
1018 args2
[0] = Qcall_process_region
;
1019 memcpy (args2
+ 1, args
, nargs
* sizeof *args
);
1020 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1021 val
= CONSP (coding_systems
) ? XCDR (coding_systems
) : Qnil
;
1024 val
= complement_process_encoding_system (val
);
1027 ptrdiff_t count1
= SPECPDL_INDEX ();
1029 specbind (intern ("coding-system-for-write"), val
);
1030 /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we
1031 happen to get a ".Z" suffix. */
1032 specbind (intern ("file-name-handler-alist"), Qnil
);
1033 write_region (start
, end
, filename_string
, Qnil
, Qlambda
, Qnil
, Qnil
, fd
);
1035 unbind_to (count1
, Qnil
);
1038 if (lseek (fd
, 0, SEEK_SET
) < 0)
1039 report_file_error ("Setting file position", filename_string
);
1041 /* Note that Fcall_process takes care of binding
1042 coding-system-for-read. */
1044 *filename_string_ptr
= filename_string
;
1049 DEFUN ("call-process-region", Fcall_process_region
, Scall_process_region
,
1051 doc
: /* Send text from START to END to a synchronous process running PROGRAM.
1052 The remaining arguments are optional.
1053 Delete the text if fourth arg DELETE is non-nil.
1055 Insert output in BUFFER before point; t means current buffer; nil for
1056 BUFFER means discard it; 0 means discard and don't wait; and `(:file
1057 FILE)', where FILE is a file name string, means that it should be
1058 written to that file (if the file already exists it is overwritten).
1059 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
1060 REAL-BUFFER says what to do with standard output, as above,
1061 while STDERR-FILE says what to do with standard error in the child.
1062 STDERR-FILE may be nil (discard standard error output),
1063 t (mix it with ordinary output), or a file name string.
1065 Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.
1066 Remaining args are passed to PROGRAM at startup as command args.
1068 If BUFFER is 0, `call-process-region' returns immediately with value nil.
1069 Otherwise it waits for PROGRAM to terminate
1070 and returns a numeric exit status or a signal description string.
1071 If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
1073 usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */)
1074 (ptrdiff_t nargs
, Lisp_Object
*args
)
1076 struct gcpro gcpro1
;
1077 Lisp_Object infile
, val
;
1078 ptrdiff_t count
= SPECPDL_INDEX ();
1079 Lisp_Object start
= args
[0];
1080 Lisp_Object end
= args
[1];
1084 if (STRINGP (start
))
1085 empty_input
= SCHARS (start
) == 0;
1086 else if (NILP (start
))
1087 empty_input
= BEG
== Z
;
1090 validate_region (&args
[0], &args
[1]);
1093 empty_input
= XINT (start
) == XINT (end
);
1097 fd
= create_temp_file (nargs
, args
, &infile
);
1101 fd
= emacs_open (NULL_DEVICE
, O_RDONLY
, 0);
1103 report_file_error ("Opening null device", Qnil
);
1104 record_unwind_protect_int (close_file_unwind
, fd
);
1109 if (nargs
> 3 && !NILP (args
[3]))
1110 Fdelete_region (start
, end
);
1124 val
= call_process (nargs
, args
, fd
, empty_input
? -1 : count
);
1125 RETURN_UNGCPRO (unbind_to (count
, val
));
1129 static int relocate_fd (int fd
, int minfd
);
1133 add_env (char **env
, char **new_env
, char *string
)
1140 /* See if this string duplicates any string already in the env.
1141 If so, don't put it in.
1142 When an env var has multiple definitions,
1143 we keep the definition that comes first in process-environment. */
1144 for (ep
= env
; ok
&& ep
!= new_env
; ep
++)
1146 char *p
= *ep
, *q
= string
;
1152 /* The string is a lone variable name; keep it for now, we
1153 will remove it later. It is a placeholder for a
1154 variable that is not to be included in the environment. */
1162 *new_env
++ = string
;
1166 /* This is the last thing run in a newly forked inferior
1167 either synchronous or asynchronous.
1168 Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2.
1169 Initialize inferior's priority, pgrp, connected dir and environment.
1170 then exec another program based on new_argv.
1172 If SET_PGRP, put the subprocess into a separate process group.
1174 CURRENT_DIR is an elisp string giving the path of the current
1175 directory the subprocess should have. Since we can't really signal
1176 a decent error from within the child, this should be verified as an
1177 executable directory by the parent. */
1180 child_setup (int in
, int out
, int err
, char **new_argv
, bool set_pgrp
,
1181 Lisp_Object current_dir
)
1191 pid_t pid
= getpid ();
1192 #endif /* WINDOWSNT */
1194 /* Note that use of alloca is always safe here. It's obvious for systems
1195 that do not have true vfork or that have true (stack) alloca.
1196 If using vfork and C_ALLOCA (when Emacs used to include
1197 src/alloca.c) it is safe because that changes the superior's
1198 static variables as if the superior had done alloca and will be
1199 cleaned up in the usual way. */
1204 i
= SBYTES (current_dir
);
1206 /* MSDOS must have all environment variables malloc'ed, because
1207 low-level libc functions that launch subsidiary processes rely
1209 pwd_var
= xmalloc (i
+ 5);
1211 pwd_var
= alloca (i
+ 5);
1214 memcpy (pwd_var
, "PWD=", 4);
1215 strcpy (temp
, SSDATA (current_dir
));
1218 /* We can't signal an Elisp error here; we're in a vfork. Since
1219 the callers check the current directory before forking, this
1220 should only return an error if the directory's permissions
1221 are changed between the check and this chdir, but we should
1223 if (chdir (temp
) < 0)
1224 _exit (EXIT_CANCELED
);
1226 /* Get past the drive letter, so that d:/ is left alone. */
1227 if (i
> 2 && IS_DEVICE_SEP (temp
[1]) && IS_DIRECTORY_SEP (temp
[2]))
1234 /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */
1235 while (i
> 2 && IS_DIRECTORY_SEP (temp
[i
- 1]))
1239 /* Set `env' to a vector of the strings in the environment. */
1241 register Lisp_Object tem
;
1242 register char **new_env
;
1244 register int new_length
;
1245 Lisp_Object display
= Qnil
;
1249 for (tem
= Vprocess_environment
;
1250 CONSP (tem
) && STRINGP (XCAR (tem
));
1253 if (strncmp (SSDATA (XCAR (tem
)), "DISPLAY", 7) == 0
1254 && (SDATA (XCAR (tem
)) [7] == '\0'
1255 || SDATA (XCAR (tem
)) [7] == '='))
1256 /* DISPLAY is specified in process-environment. */
1261 /* If not provided yet, use the frame's DISPLAY. */
1264 Lisp_Object tmp
= Fframe_parameter (selected_frame
, Qdisplay
);
1265 if (!STRINGP (tmp
) && CONSP (Vinitial_environment
))
1266 /* If still not found, Look for DISPLAY in Vinitial_environment. */
1267 tmp
= Fgetenv_internal (build_string ("DISPLAY"),
1268 Vinitial_environment
);
1276 /* new_length + 2 to include PWD and terminating 0. */
1277 env
= new_env
= alloca ((new_length
+ 2) * sizeof *env
);
1278 /* If we have a PWD envvar, pass one down,
1279 but with corrected value. */
1280 if (egetenv ("PWD"))
1281 *new_env
++ = pwd_var
;
1283 if (STRINGP (display
))
1285 char *vdata
= alloca (sizeof "DISPLAY=" + SBYTES (display
));
1286 strcpy (vdata
, "DISPLAY=");
1287 strcat (vdata
, SSDATA (display
));
1288 new_env
= add_env (env
, new_env
, vdata
);
1292 for (tem
= Vprocess_environment
;
1293 CONSP (tem
) && STRINGP (XCAR (tem
));
1295 new_env
= add_env (env
, new_env
, SSDATA (XCAR (tem
)));
1299 /* Remove variable names without values. */
1303 while (*q
!= 0 && strchr (*q
, '=') == NULL
)
1313 prepare_standard_handles (in
, out
, err
, handles
);
1314 set_process_dir (SDATA (current_dir
));
1315 /* Spawn the child. (See w32proc.c:sys_spawnve). */
1316 cpid
= spawnve (_P_NOWAIT
, new_argv
[0], new_argv
, env
);
1317 reset_standard_handles (in
, out
, err
, handles
);
1319 /* An error occurred while trying to spawn the process. */
1320 report_file_error ("Spawning child process", Qnil
);
1323 #else /* not WINDOWSNT */
1324 /* Make sure that in, out, and err are not actually already in
1325 descriptors zero, one, or two; this could happen if Emacs is
1326 started with its standard in, out, or error closed, as might
1329 int oin
= in
, oout
= out
;
1331 /* We have to avoid relocating the same descriptor twice! */
1333 in
= relocate_fd (in
, 3);
1338 out
= relocate_fd (out
, 3);
1342 else if (err
== oout
)
1345 err
= relocate_fd (err
, 3);
1349 /* Redirect file descriptors and clear the close-on-exec flag on the
1350 redirected ones. IN, OUT, and ERR are close-on-exec so they
1351 need not be closed explicitly. */
1359 execve (new_argv
[0], new_argv
, env
);
1362 /* Avoid deadlock if the child's perror writes to a full pipe; the
1363 pipe's reader is the parent, but with vfork the parent can't
1364 run until the child exits. Truncate the diagnostic instead. */
1365 fcntl (STDERR_FILENO
, F_SETFL
, O_NONBLOCK
);
1368 emacs_perror (new_argv
[0]);
1369 _exit (exec_errno
== ENOENT
? EXIT_ENOENT
: EXIT_CANNOT_INVOKE
);
1372 pid
= run_msdos_command (new_argv
, pwd_var
+ 4, in
, out
, err
, env
);
1375 /* An error occurred while trying to run the subprocess. */
1376 report_file_error ("Spawning child process", Qnil
);
1379 #endif /* not WINDOWSNT */
1383 /* Move the file descriptor FD so that its number is not less than MINFD.
1384 If the file descriptor is moved at all, the original is closed on MSDOS,
1385 but not elsewhere as the caller will close it anyway. */
1387 relocate_fd (int fd
, int minfd
)
1393 int new = fcntl (fd
, F_DUPFD_CLOEXEC
, minfd
);
1396 emacs_perror ("while setting up child");
1397 _exit (EXIT_CANCELED
);
1405 #endif /* not WINDOWSNT */
1408 getenv_internal_1 (const char *var
, ptrdiff_t varlen
, char **value
,
1409 ptrdiff_t *valuelen
, Lisp_Object env
)
1411 for (; CONSP (env
); env
= XCDR (env
))
1413 Lisp_Object entry
= XCAR (env
);
1415 && SBYTES (entry
) >= varlen
1417 /* NT environment variables are case insensitive. */
1418 && ! strnicmp (SDATA (entry
), var
, varlen
)
1419 #else /* not WINDOWSNT */
1420 && ! memcmp (SDATA (entry
), var
, varlen
)
1421 #endif /* not WINDOWSNT */
1424 if (SBYTES (entry
) > varlen
&& SREF (entry
, varlen
) == '=')
1426 *value
= SSDATA (entry
) + (varlen
+ 1);
1427 *valuelen
= SBYTES (entry
) - (varlen
+ 1);
1430 else if (SBYTES (entry
) == varlen
)
1432 /* Lone variable names in Vprocess_environment mean that
1433 variable should be removed from the environment. */
1443 getenv_internal (const char *var
, ptrdiff_t varlen
, char **value
,
1444 ptrdiff_t *valuelen
, Lisp_Object frame
)
1446 /* Try to find VAR in Vprocess_environment first. */
1447 if (getenv_internal_1 (var
, varlen
, value
, valuelen
,
1448 Vprocess_environment
))
1449 return *value
? 1 : 0;
1451 /* For DISPLAY try to get the values from the frame or the initial env. */
1452 if (strcmp (var
, "DISPLAY") == 0)
1455 = Fframe_parameter (NILP (frame
) ? selected_frame
: frame
, Qdisplay
);
1456 if (STRINGP (display
))
1458 *value
= SSDATA (display
);
1459 *valuelen
= SBYTES (display
);
1462 /* If still not found, Look for DISPLAY in Vinitial_environment. */
1463 if (getenv_internal_1 (var
, varlen
, value
, valuelen
,
1464 Vinitial_environment
))
1465 return *value
? 1 : 0;
1471 DEFUN ("getenv-internal", Fgetenv_internal
, Sgetenv_internal
, 1, 2, 0,
1472 doc
: /* Get the value of environment variable VARIABLE.
1473 VARIABLE should be a string. Value is nil if VARIABLE is undefined in
1474 the environment. Otherwise, value is a string.
1476 This function searches `process-environment' for VARIABLE.
1478 If optional parameter ENV is a list, then search this list instead of
1479 `process-environment', and return t when encountering a negative entry
1480 \(an entry for a variable with no value). */)
1481 (Lisp_Object variable
, Lisp_Object env
)
1486 CHECK_STRING (variable
);
1489 if (getenv_internal_1 (SSDATA (variable
), SBYTES (variable
),
1490 &value
, &valuelen
, env
))
1491 return value
? make_string (value
, valuelen
) : Qt
;
1495 else if (getenv_internal (SSDATA (variable
), SBYTES (variable
),
1496 &value
, &valuelen
, env
))
1497 return make_string (value
, valuelen
);
1502 /* A version of getenv that consults the Lisp environment lists,
1503 easily callable from C. */
1505 egetenv (const char *var
)
1510 if (getenv_internal (var
, strlen (var
), &value
, &valuelen
, Qnil
))
1517 /* This is run before init_cmdargs. */
1520 init_callproc_1 (void)
1523 const char *etc_dir
= ns_etc_directory ();
1524 const char *path_exec
= ns_exec_path ();
1527 Vdata_directory
= decode_env_path ("EMACSDATA",
1532 Vdata_directory
= Ffile_name_as_directory (Fcar (Vdata_directory
));
1534 Vdoc_directory
= decode_env_path ("EMACSDOC",
1539 Vdoc_directory
= Ffile_name_as_directory (Fcar (Vdoc_directory
));
1541 /* Check the EMACSPATH environment variable, defaulting to the
1542 PATH_EXEC path from epaths.h. */
1543 Vexec_path
= decode_env_path ("EMACSPATH",
1545 path_exec
? path_exec
:
1548 Vexec_directory
= Ffile_name_as_directory (Fcar (Vexec_path
));
1549 /* FIXME? For ns, path_exec should go at the front? */
1550 Vexec_path
= nconc2 (decode_env_path ("PATH", "", 0), Vexec_path
);
1553 /* This is run after init_cmdargs, when Vinstallation_directory is valid. */
1556 init_callproc (void)
1558 char *data_dir
= egetenv ("EMACSDATA");
1561 Lisp_Object tempdir
;
1565 const char *etc_dir
= ns_etc_directory ();
1568 data_dir
= alloca (strlen (etc_dir
) + 1);
1569 strcpy (data_dir
, etc_dir
);
1574 if (!NILP (Vinstallation_directory
))
1576 /* Add to the path the lib-src subdir of the installation dir. */
1578 tem
= Fexpand_file_name (build_string ("lib-src"),
1579 Vinstallation_directory
);
1581 /* MSDOS uses wrapped binaries, so don't do this. */
1582 if (NILP (Fmember (tem
, Vexec_path
)))
1585 const char *path_exec
= ns_exec_path ();
1587 Vexec_path
= decode_env_path ("EMACSPATH",
1589 path_exec
? path_exec
:
1592 Vexec_path
= Fcons (tem
, Vexec_path
);
1593 Vexec_path
= nconc2 (decode_env_path ("PATH", "", 0), Vexec_path
);
1596 Vexec_directory
= Ffile_name_as_directory (tem
);
1597 #endif /* not MSDOS */
1599 /* Maybe use ../etc as well as ../lib-src. */
1602 tem
= Fexpand_file_name (build_string ("etc"),
1603 Vinstallation_directory
);
1604 Vdoc_directory
= Ffile_name_as_directory (tem
);
1608 /* Look for the files that should be in etc. We don't use
1609 Vinstallation_directory, because these files are never installed
1610 near the executable, and they are never in the build
1611 directory when that's different from the source directory.
1613 Instead, if these files are not in the nominal place, we try the
1614 source directory. */
1617 Lisp_Object tem
, tem1
, srcdir
;
1618 Lisp_Object lispdir
= Fcar (decode_env_path (0, PATH_DUMPLOADSEARCH
, 0));
1620 srcdir
= Fexpand_file_name (build_string ("../src/"), lispdir
);
1622 tem
= Fexpand_file_name (build_string ("NEWS"), Vdata_directory
);
1623 tem1
= Ffile_exists_p (tem
);
1624 if (!NILP (Fequal (srcdir
, Vinvocation_directory
)) || NILP (tem1
))
1627 newdir
= Fexpand_file_name (build_string ("../etc/"), lispdir
);
1628 tem
= Fexpand_file_name (build_string ("NEWS"), newdir
);
1629 tem1
= Ffile_exists_p (tem
);
1631 Vdata_directory
= newdir
;
1639 tempdir
= Fdirectory_file_name (Vexec_directory
);
1640 if (! file_accessible_directory_p (SSDATA (tempdir
)))
1641 dir_warning ("arch-dependent data dir", Vexec_directory
);
1644 tempdir
= Fdirectory_file_name (Vdata_directory
);
1645 if (! file_accessible_directory_p (SSDATA (tempdir
)))
1646 dir_warning ("arch-independent data dir", Vdata_directory
);
1648 sh
= getenv ("SHELL");
1649 Vshell_file_name
= build_string (sh
? sh
: "/bin/sh");
1652 Vshared_game_score_directory
= Qnil
;
1654 Vshared_game_score_directory
= build_unibyte_string (PATH_GAME
);
1655 if (NILP (Ffile_accessible_directory_p (Vshared_game_score_directory
)))
1656 Vshared_game_score_directory
= Qnil
;
1661 set_initial_environment (void)
1664 for (envp
= environ
; *envp
; envp
++)
1665 Vprocess_environment
= Fcons (build_string (*envp
),
1666 Vprocess_environment
);
1667 /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent
1668 to use `delete' and friends on process-environment. */
1669 Vinitial_environment
= Fcopy_sequence (Vprocess_environment
);
1673 syms_of_callproc (void)
1676 Vtemp_file_name_pattern
= build_string ("emacsXXXXXX");
1677 #elif defined (WINDOWSNT)
1678 Vtemp_file_name_pattern
= build_string ("emXXXXXX");
1680 Vtemp_file_name_pattern
= build_string ("detmp.XXX");
1682 staticpro (&Vtemp_file_name_pattern
);
1685 synch_process_tempfile
= make_number (0);
1686 staticpro (&synch_process_tempfile
);
1689 DEFVAR_LISP ("shell-file-name", Vshell_file_name
,
1690 doc
: /* File name to load inferior shells from.
1691 Initialized from the SHELL environment variable, or to a system-dependent
1692 default if SHELL is not set. */);
1694 DEFVAR_LISP ("exec-path", Vexec_path
,
1695 doc
: /* List of directories to search programs to run in subprocesses.
1696 Each element is a string (directory name) or nil (try default directory).
1698 By default the last element of this list is `exec-directory'. The
1699 last element is not always used, for example in shell completion
1700 (`shell-dynamic-complete-command'). */);
1702 DEFVAR_LISP ("exec-suffixes", Vexec_suffixes
,
1703 doc
: /* List of suffixes to try to find executable file names.
1704 Each element is a string. */);
1705 Vexec_suffixes
= Qnil
;
1707 DEFVAR_LISP ("exec-directory", Vexec_directory
,
1708 doc
: /* Directory for executables for Emacs to invoke.
1709 More generally, this includes any architecture-dependent files
1710 that are built and installed from the Emacs distribution. */);
1712 DEFVAR_LISP ("data-directory", Vdata_directory
,
1713 doc
: /* Directory of machine-independent files that come with GNU Emacs.
1714 These are files intended for Emacs to use while it runs. */);
1716 DEFVAR_LISP ("doc-directory", Vdoc_directory
,
1717 doc
: /* Directory containing the DOC file that comes with GNU Emacs.
1718 This is usually the same as `data-directory'. */);
1720 DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory
,
1721 doc
: /* For internal use by the build procedure only.
1722 This is the name of the directory in which the build procedure installed
1723 Emacs's info files; the default value for `Info-default-directory-list'
1725 Vconfigure_info_directory
= build_string (PATH_INFO
);
1727 DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory
,
1728 doc
: /* Directory of score files for games which come with GNU Emacs.
1729 If this variable is nil, then Emacs is unable to use a shared directory. */);
1731 Vshared_game_score_directory
= Qnil
;
1733 Vshared_game_score_directory
= build_string (PATH_GAME
);
1736 DEFVAR_LISP ("initial-environment", Vinitial_environment
,
1737 doc
: /* List of environment variables inherited from the parent process.
1738 Each element should be a string of the form ENVVARNAME=VALUE.
1739 The elements must normally be decoded (using `locale-coding-system') for use. */);
1740 Vinitial_environment
= Qnil
;
1742 DEFVAR_LISP ("process-environment", Vprocess_environment
,
1743 doc
: /* List of overridden environment variables for subprocesses to inherit.
1744 Each element should be a string of the form ENVVARNAME=VALUE.
1746 Entries in this list take precedence to those in the frame-local
1747 environments. Therefore, let-binding `process-environment' is an easy
1748 way to temporarily change the value of an environment variable,
1749 irrespective of where it comes from. To use `process-environment' to
1750 remove an environment variable, include only its name in the list,
1753 This variable is set to nil when Emacs starts.
1755 If multiple entries define the same variable, the first one always
1758 Non-ASCII characters are encoded according to the initial value of
1759 `locale-coding-system', i.e. the elements must normally be decoded for
1762 See `setenv' and `getenv'. */);
1763 Vprocess_environment
= Qnil
;
1765 defsubr (&Scall_process
);
1766 defsubr (&Sgetenv_internal
);
1767 defsubr (&Scall_process_region
);