1 /* Synchronous subprocess invocation for GNU Emacs.
2 Copyright (C) 1985-1988, 1993-1995, 1999-2011
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/>. */
26 #include <sys/types.h>
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>
48 #include "character.h"
51 #include "composite.h"
54 #include "syssignal.h"
56 #include "blockinput.h"
58 #include "termhooks.h"
65 extern char **environ
;
71 #define setpgrp setpgid
75 /* Pattern used by call-process-region to make temp files. */
76 static Lisp_Object Vtemp_file_name_pattern
;
78 /* True if we are about to fork off a synchronous process or if we
79 are waiting for it. */
80 int synch_process_alive
;
82 /* Nonzero => this is a string explaining death of synchronous subprocess. */
83 const char *synch_process_death
;
85 /* Nonzero => this is the signal number that terminated the subprocess. */
86 int synch_process_termsig
;
88 /* If synch_process_death is zero,
89 this is exit code of synchronous subprocess. */
90 int synch_process_retcode
;
93 /* Clean up when exiting Fcall_process.
94 On MSDOS, delete the temporary file on any kind of termination.
95 On Unix, kill the process and any children on termination by signal. */
97 /* Nonzero if this is termination due to exit. */
98 static int call_process_exited
;
100 static Lisp_Object
Fgetenv_internal (Lisp_Object
, Lisp_Object
);
103 call_process_kill (Lisp_Object fdpid
)
107 CONS_TO_INTEGER (Fcar (fdpid
), int, fd
);
108 CONS_TO_INTEGER (Fcdr (fdpid
), pid_t
, pid
);
110 EMACS_KILLPG (pid
, SIGKILL
);
111 synch_process_alive
= 0;
116 call_process_cleanup (Lisp_Object arg
)
118 Lisp_Object fdpid
= Fcdr (arg
);
126 Fset_buffer (Fcar (arg
));
127 CONS_TO_INTEGER (Fcar (fdpid
), int, fd
);
130 /* for MSDOS fdpid is really (fd . tempfile) */
132 /* FD is -1 and FILE is "" when we didn't actually create a
133 temporary file in call-process. */
136 if (!(strcmp (SDATA (file
), NULL_DEVICE
) == 0 || SREF (file
, 0) == '\0'))
137 unlink (SDATA (file
));
138 #else /* not MSDOS */
139 CONS_TO_INTEGER (Fcdr (fdpid
), pid_t
, pid
);
141 if (call_process_exited
)
147 if (EMACS_KILLPG (pid
, SIGINT
) == 0)
149 ptrdiff_t count
= SPECPDL_INDEX ();
150 record_unwind_protect (call_process_kill
, fdpid
);
151 message1 ("Waiting for process to die...(type C-g again to kill it instantly)");
154 wait_for_termination (pid
);
156 specpdl_ptr
= specpdl
+ count
; /* Discard the unwind protect. */
157 message1 ("Waiting for process to die...done");
159 synch_process_alive
= 0;
161 #endif /* not MSDOS */
165 DEFUN ("call-process", Fcall_process
, Scall_process
, 1, MANY
, 0,
166 doc
: /* Call PROGRAM synchronously in separate process.
167 The remaining arguments are optional.
168 The program's input comes from file INFILE (nil means `/dev/null').
169 Insert output in BUFFER before point; t means current buffer; nil for BUFFER
170 means discard it; 0 means discard and don't wait; and `(:file FILE)', where
171 FILE is a file name string, means that it should be written to that file.
172 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
173 REAL-BUFFER says what to do with standard output, as above,
174 while STDERR-FILE says what to do with standard error in the child.
175 STDERR-FILE may be nil (discard standard error output),
176 t (mix it with ordinary output), or a file name string.
178 Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.
179 Remaining arguments are strings passed as command arguments to PROGRAM.
181 If executable PROGRAM can't be found as an executable, `call-process'
182 signals a Lisp error. `call-process' reports errors in execution of
183 the program only through its return and output.
185 If BUFFER is 0, `call-process' returns immediately with value nil.
186 Otherwise it waits for PROGRAM to terminate
187 and returns a numeric exit status or a signal description string.
188 If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
190 usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */)
191 (ptrdiff_t nargs
, Lisp_Object
*args
)
193 Lisp_Object infile
, buffer
, current_dir
, path
, cleanup_info_tail
;
197 #define CALLPROC_BUFFER_SIZE_MIN (16 * 1024)
198 #define CALLPROC_BUFFER_SIZE_MAX (4 * CALLPROC_BUFFER_SIZE_MIN)
199 char buf
[CALLPROC_BUFFER_SIZE_MAX
];
200 int bufsize
= CALLPROC_BUFFER_SIZE_MIN
;
201 ptrdiff_t count
= SPECPDL_INDEX ();
204 register const unsigned char **new_argv
;
205 /* File to use for stderr in the child.
206 t means use same as standard output. */
207 Lisp_Object error_file
;
208 Lisp_Object output_file
= Qnil
;
209 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
210 char *outf
, *tempfile
= NULL
;
217 struct coding_system process_coding
; /* coding-system of process output */
218 struct coding_system argument_coding
; /* coding-system of arguments */
219 /* Set to the return value of Ffind_operation_coding_system. */
220 Lisp_Object coding_systems
;
221 int output_to_buffer
= 1;
223 /* Qt denotes that Ffind_operation_coding_system is not yet called. */
226 CHECK_STRING (args
[0]);
231 /* Without asynchronous processes we cannot have BUFFER == 0. */
233 && (INTEGERP (CONSP (args
[2]) ? XCAR (args
[2]) : args
[2])))
234 error ("Operating system cannot handle asynchronous subprocesses");
235 #endif /* subprocesses */
237 /* Decide the coding-system for giving arguments. */
239 Lisp_Object val
, *args2
;
242 /* If arguments are supplied, we may have to encode them. */
246 Lisp_Object coding_attrs
;
248 for (i
= 4; i
< nargs
; i
++)
249 CHECK_STRING (args
[i
]);
251 for (i
= 4; i
< nargs
; i
++)
252 if (STRING_MULTIBYTE (args
[i
]))
255 if (!NILP (Vcoding_system_for_write
))
256 val
= Vcoding_system_for_write
;
257 else if (! must_encode
)
261 SAFE_NALLOCA (args2
, 1, nargs
+ 1);
262 args2
[0] = Qcall_process
;
263 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
264 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
265 val
= CONSP (coding_systems
) ? XCDR (coding_systems
) : Qnil
;
267 val
= complement_process_encoding_system (val
);
268 setup_coding_system (Fcheck_coding_system (val
), &argument_coding
);
269 coding_attrs
= CODING_ID_ATTRS (argument_coding
.id
);
270 if (NILP (CODING_ATTR_ASCII_COMPAT (coding_attrs
)))
272 /* We should not use an ASCII incompatible coding system. */
273 val
= raw_text_coding_system (val
);
274 setup_coding_system (val
, &argument_coding
);
279 if (nargs
>= 2 && ! NILP (args
[1]))
281 infile
= Fexpand_file_name (args
[1], BVAR (current_buffer
, directory
));
282 CHECK_STRING (infile
);
285 infile
= build_string (NULL_DEVICE
);
291 /* If BUFFER is a list, its meaning is (BUFFER-FOR-STDOUT
292 FILE-FOR-STDERR), unless the first element is :file, in which case see
293 the next paragraph. */
295 && (! SYMBOLP (XCAR (buffer
))
296 || strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer
))), ":file")))
298 if (CONSP (XCDR (buffer
)))
300 Lisp_Object stderr_file
;
301 stderr_file
= XCAR (XCDR (buffer
));
303 if (NILP (stderr_file
) || EQ (Qt
, stderr_file
))
304 error_file
= stderr_file
;
306 error_file
= Fexpand_file_name (stderr_file
, Qnil
);
309 buffer
= XCAR (buffer
);
312 /* If the buffer is (still) a list, it might be a (:file "file") spec. */
314 && SYMBOLP (XCAR (buffer
))
315 && ! strcmp (SSDATA (SYMBOL_NAME (XCAR (buffer
))), ":file"))
317 output_file
= Fexpand_file_name (XCAR (XCDR (buffer
)),
318 BVAR (current_buffer
, directory
));
319 CHECK_STRING (output_file
);
323 if (!(EQ (buffer
, Qnil
)
325 || INTEGERP (buffer
)))
327 Lisp_Object spec_buffer
;
328 spec_buffer
= buffer
;
329 buffer
= Fget_buffer_create (buffer
);
330 /* Mention the buffer name for a better error message. */
332 CHECK_BUFFER (spec_buffer
);
333 CHECK_BUFFER (buffer
);
339 /* Make sure that the child will be able to chdir to the current
340 buffer's current directory, or its unhandled equivalent. We
341 can't just have the child check for an error when it does the
342 chdir, since it's in a vfork.
344 We have to GCPRO around this because Fexpand_file_name,
345 Funhandled_file_name_directory, and Ffile_accessible_directory_p
346 might call a file name handling function. The argument list is
347 protected by the caller, so all we really have to worry about is
350 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
352 current_dir
= BVAR (current_buffer
, directory
);
354 GCPRO5 (infile
, buffer
, current_dir
, error_file
, output_file
);
356 current_dir
= Funhandled_file_name_directory (current_dir
);
357 if (NILP (current_dir
))
358 /* If the file name handler says that current_dir is unreachable, use
359 a sensible default. */
360 current_dir
= build_string ("~/");
361 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
362 current_dir
= Ffile_name_as_directory (current_dir
);
364 if (NILP (Ffile_accessible_directory_p (current_dir
)))
365 report_file_error ("Setting current directory",
366 Fcons (BVAR (current_buffer
, directory
), Qnil
));
368 if (STRING_MULTIBYTE (infile
))
369 infile
= ENCODE_FILE (infile
);
370 if (STRING_MULTIBYTE (current_dir
))
371 current_dir
= ENCODE_FILE (current_dir
);
372 if (STRINGP (error_file
) && STRING_MULTIBYTE (error_file
))
373 error_file
= ENCODE_FILE (error_file
);
374 if (STRINGP (output_file
) && STRING_MULTIBYTE (output_file
))
375 output_file
= ENCODE_FILE (output_file
);
379 display_p
= INTERACTIVE
&& nargs
>= 4 && !NILP (args
[3]);
381 filefd
= emacs_open (SSDATA (infile
), O_RDONLY
, 0);
384 infile
= DECODE_FILE (infile
);
385 report_file_error ("Opening process input file", Fcons (infile
, Qnil
));
388 if (STRINGP (output_file
))
391 fd_output
= emacs_open (SSDATA (output_file
),
392 O_WRONLY
| O_TRUNC
| O_CREAT
| O_TEXT
,
394 #else /* not DOS_NT */
395 fd_output
= creat (SSDATA (output_file
), 0666);
396 #endif /* not DOS_NT */
399 output_file
= DECODE_FILE (output_file
);
400 report_file_error ("Opening process output file",
401 Fcons (output_file
, Qnil
));
403 if (STRINGP (error_file
) || NILP (error_file
))
404 output_to_buffer
= 0;
407 /* Search for program; barf if not found. */
409 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
411 GCPRO4 (infile
, buffer
, current_dir
, error_file
);
412 openp (Vexec_path
, args
[0], Vexec_suffixes
, &path
, make_number (X_OK
));
417 emacs_close (filefd
);
418 report_file_error ("Searching for program", Fcons (args
[0], Qnil
));
421 /* If program file name starts with /: for quoting a magic name,
423 if (SBYTES (path
) > 2 && SREF (path
, 0) == '/'
424 && SREF (path
, 1) == ':')
425 path
= Fsubstring (path
, make_number (2), Qnil
);
427 SAFE_ALLOCA (new_argv
, const unsigned char **,
428 (nargs
> 4 ? nargs
- 2 : 2) * sizeof *new_argv
);
432 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
434 GCPRO5 (infile
, buffer
, current_dir
, path
, error_file
);
435 argument_coding
.dst_multibyte
= 0;
436 for (i
= 4; i
< nargs
; i
++)
438 argument_coding
.src_multibyte
= STRING_MULTIBYTE (args
[i
]);
439 if (CODING_REQUIRE_ENCODING (&argument_coding
))
440 /* We must encode this argument. */
441 args
[i
] = encode_coding_string (&argument_coding
, args
[i
], 1);
444 for (i
= 4; i
< nargs
; i
++)
445 new_argv
[i
- 3] = SDATA (args
[i
]);
450 new_argv
[0] = SDATA (path
);
452 #ifdef MSDOS /* MW, July 1993 */
454 /* If we're redirecting STDOUT to a file, that file is already open
458 if ((outf
= egetenv ("TMPDIR")))
459 strcpy (tempfile
= alloca (strlen (outf
) + 20), outf
);
462 tempfile
= alloca (20);
465 dostounix_filename (tempfile
);
466 if (*tempfile
== '\0' || tempfile
[strlen (tempfile
) - 1] != '/')
467 strcat (tempfile
, "/");
468 strcat (tempfile
, "detmp.XXX");
470 outfilefd
= creat (tempfile
, S_IREAD
| S_IWRITE
);
472 emacs_close (filefd
);
473 report_file_error ("Opening process output file",
474 Fcons (build_string (tempfile
), Qnil
));
478 outfilefd
= fd_output
;
483 if (INTEGERP (buffer
))
484 fd
[1] = emacs_open (NULL_DEVICE
, O_WRONLY
, 0), fd
[0] = -1;
491 emacs_close (filefd
);
492 report_file_error ("Creating process pipe", Qnil
);
498 /* child_setup must clobber environ in systems with true vfork.
499 Protect it from permanent change. */
500 register char **save_environ
= environ
;
501 register int fd1
= fd
[1];
503 #ifdef HAVE_WORKING_VFORK
506 struct sigaction sigpipe_action
;
511 #if 0 /* Some systems don't have sigblock. */
512 mask
= sigblock (sigmask (SIGCHLD
));
515 /* Record that we're about to create a synchronous process. */
516 synch_process_alive
= 1;
518 /* These vars record information from process termination.
519 Clear them now before process can possibly terminate,
520 to avoid timing error if process terminates soon. */
521 synch_process_death
= 0;
522 synch_process_retcode
= 0;
523 synch_process_termsig
= 0;
525 if (NILP (error_file
))
526 fd_error
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
527 else if (STRINGP (error_file
))
530 fd_error
= emacs_open (SSDATA (error_file
),
531 O_WRONLY
| O_TRUNC
| O_CREAT
| O_TEXT
,
533 #else /* not DOS_NT */
534 fd_error
= creat (SSDATA (error_file
), 0666);
535 #endif /* not DOS_NT */
540 emacs_close (filefd
);
548 if (NILP (error_file
))
549 error_file
= build_string (NULL_DEVICE
);
550 else if (STRINGP (error_file
))
551 error_file
= DECODE_FILE (error_file
);
552 report_file_error ("Cannot redirect stderr", Fcons (error_file
, Qnil
));
555 #ifdef MSDOS /* MW, July 1993 */
556 /* Note that on MSDOS `child_setup' actually returns the child process
557 exit status, not its PID, so we assign it to `synch_process_retcode'
559 pid
= child_setup (filefd
, outfilefd
, fd_error
, (char **) new_argv
,
562 /* Record that the synchronous process exited and note its
563 termination status. */
564 synch_process_alive
= 0;
565 synch_process_retcode
= pid
;
566 if (synch_process_retcode
< 0) /* means it couldn't be exec'ed */
568 synchronize_system_messages_locale ();
569 synch_process_death
= strerror (errno
);
572 emacs_close (outfilefd
);
573 if (fd_error
!= outfilefd
)
574 emacs_close (fd_error
);
575 fd1
= -1; /* No harm in closing that one! */
578 /* Since CRLF is converted to LF within `decode_coding', we
579 can always open a file with binary mode. */
580 fd
[0] = emacs_open (tempfile
, O_RDONLY
| O_BINARY
, 0);
584 emacs_close (filefd
);
585 report_file_error ("Cannot re-open temporary file",
586 Fcons (build_string (tempfile
), Qnil
));
590 fd
[0] = -1; /* We are not going to read from tempfile. */
591 #else /* not MSDOS */
593 pid
= child_setup (filefd
, fd1
, fd_error
, (char **) new_argv
,
595 #else /* not WINDOWSNT */
597 #ifdef HAVE_WORKING_VFORK
598 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
599 this sets the parent's signal handlers as well as the child's.
600 So delay all interrupts whose handlers the child might munge,
601 and record the current handlers so they can be restored later. */
602 sigemptyset (&blocked
);
603 sigaddset (&blocked
, SIGPIPE
);
604 sigaction (SIGPIPE
, 0, &sigpipe_action
);
605 pthread_sigmask (SIG_BLOCK
, &blocked
, &procmask
);
610 /* vfork, and prevent local vars from being clobbered by the vfork. */
612 Lisp_Object
volatile buffer_volatile
= buffer
;
613 Lisp_Object
volatile coding_systems_volatile
= coding_systems
;
614 Lisp_Object
volatile current_dir_volatile
= current_dir
;
615 int volatile display_p_volatile
= display_p
;
616 int volatile fd1_volatile
= fd1
;
617 int volatile fd_error_volatile
= fd_error
;
618 int volatile fd_output_volatile
= fd_output
;
619 int volatile output_to_buffer_volatile
= output_to_buffer
;
620 int volatile sa_must_free_volatile
= sa_must_free
;
621 ptrdiff_t volatile sa_count_volatile
= sa_count
;
622 unsigned char const **volatile new_argv_volatile
= new_argv
;
626 buffer
= buffer_volatile
;
627 coding_systems
= coding_systems_volatile
;
628 current_dir
= current_dir_volatile
;
629 display_p
= display_p_volatile
;
631 fd_error
= fd_error_volatile
;
632 fd_output
= fd_output_volatile
;
633 output_to_buffer
= output_to_buffer_volatile
;
634 sa_must_free
= sa_must_free_volatile
;
635 sa_count
= sa_count_volatile
;
636 new_argv
= new_argv_volatile
;
652 /* GConf causes us to ignore SIGPIPE, make sure it is restored
654 //signal (SIGPIPE, SIG_DFL);
655 #ifdef HAVE_WORKING_VFORK
656 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
659 child_setup (filefd
, fd1
, fd_error
, (char **) new_argv
,
665 #ifdef HAVE_WORKING_VFORK
666 /* Restore the signal state. */
667 sigaction (SIGPIPE
, &sigpipe_action
, 0);
668 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
671 #endif /* not WINDOWSNT */
673 /* The MSDOS case did this already. */
675 emacs_close (fd_error
);
676 #endif /* not MSDOS */
678 environ
= save_environ
;
680 /* Close most of our fd's, but not fd[0]
681 since we will use that to read input from. */
682 emacs_close (filefd
);
684 emacs_close (fd_output
);
685 if (fd1
>= 0 && fd1
!= fd_error
)
693 report_file_error ("Doing vfork", Qnil
);
696 if (INTEGERP (buffer
))
703 /* Enable sending signal if user quits below. */
704 call_process_exited
= 0;
707 /* MSDOS needs different cleanup information. */
708 cleanup_info_tail
= build_string (tempfile
? tempfile
: "");
710 cleanup_info_tail
= INTEGER_TO_CONS (pid
);
711 #endif /* not MSDOS */
712 record_unwind_protect (call_process_cleanup
,
713 Fcons (Fcurrent_buffer (),
714 Fcons (INTEGER_TO_CONS (fd
[0]),
715 cleanup_info_tail
)));
717 if (BUFFERP (buffer
))
718 Fset_buffer (buffer
);
722 /* If BUFFER is nil, we must read process output once and then
723 discard it, so setup coding system but with nil. */
724 setup_coding_system (Qnil
, &process_coding
);
728 Lisp_Object val
, *args2
;
731 if (!NILP (Vcoding_system_for_read
))
732 val
= Vcoding_system_for_read
;
735 if (EQ (coding_systems
, Qt
))
739 SAFE_NALLOCA (args2
, 1, nargs
+ 1);
740 args2
[0] = Qcall_process
;
741 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
743 = Ffind_operation_coding_system (nargs
+ 1, args2
);
745 if (CONSP (coding_systems
))
746 val
= XCAR (coding_systems
);
747 else if (CONSP (Vdefault_process_coding_system
))
748 val
= XCAR (Vdefault_process_coding_system
);
752 Fcheck_coding_system (val
);
753 /* In unibyte mode, character code conversion should not take
754 place but EOL conversion should. So, setup raw-text or one
755 of the subsidiary according to the information just setup. */
756 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
758 val
= raw_text_coding_system (val
);
759 setup_coding_system (val
, &process_coding
);
765 if (output_to_buffer
)
769 EMACS_INT total_read
= 0;
771 int display_on_the_fly
= display_p
;
772 struct coding_system saved_coding
;
774 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 (fd
[0], 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 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. */
813 ptrdiff_t count1
= SPECPDL_INDEX ();
815 XSETBUFFER (curbuf
, current_buffer
);
816 /* We cannot allow after-change-functions be run
817 during decoding, because that might modify the
818 buffer, while we rely on process_coding.produced to
819 faithfully reflect inserted text until we
820 TEMP_SET_PT_BOTH below. */
821 specbind (Qinhibit_modification_hooks
, Qt
);
822 decode_coding_c_string (&process_coding
,
823 (unsigned char *) buf
, nread
, curbuf
);
824 unbind_to (count1
, Qnil
);
825 if (display_on_the_fly
826 && CODING_REQUIRE_DETECTION (&saved_coding
)
827 && ! CODING_REQUIRE_DETECTION (&process_coding
))
829 /* We have detected some coding system. But,
830 there's a possibility that the detection was
831 done by insufficient data. So, we give up
832 displaying on the fly. */
833 if (process_coding
.produced
> 0)
834 del_range_2 (process_coding
.dst_pos
,
835 process_coding
.dst_pos_byte
,
836 process_coding
.dst_pos
837 + process_coding
.produced_char
,
838 process_coding
.dst_pos_byte
839 + process_coding
.produced
, 0);
840 display_on_the_fly
= 0;
841 process_coding
= saved_coding
;
843 /* This is to make the above condition always
844 fails in the future. */
845 saved_coding
.common_flags
846 &= ~CODING_REQUIRE_DETECTION_MASK
;
850 TEMP_SET_PT_BOTH (PT
+ process_coding
.produced_char
,
851 PT_BYTE
+ process_coding
.produced
);
852 carryover
= process_coding
.carryover_bytes
;
854 memcpy (buf
, process_coding
.carryover
,
855 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
;
871 prepare_menu_bars ();
873 redisplay_preserve_echo_area (1);
874 /* This variable might have been set to 0 for code
875 detection. In that case, we set it back to 1 because
876 we should have already detected a coding system. */
877 display_on_the_fly
= 1;
884 Vlast_coding_system_used
= CODING_ID_NAME (process_coding
.id
);
885 /* If the caller required, let the buffer inherit the
886 coding-system used to decode the process output. */
887 if (inherit_process_coding_system
)
888 call1 (intern ("after-insert-file-set-buffer-file-coding-system"),
889 make_number (total_read
));
893 /* Wait for it to terminate, unless it already has. */
894 if (output_to_buffer
)
895 wait_for_termination (pid
);
897 interruptible_wait_for_termination (pid
);
902 /* Don't kill any children that the subprocess may have left behind
904 call_process_exited
= 1;
907 unbind_to (count
, Qnil
);
909 if (synch_process_termsig
)
913 synchronize_system_messages_locale ();
914 signame
= strsignal (synch_process_termsig
);
919 synch_process_death
= signame
;
922 if (synch_process_death
)
923 return code_convert_string_norecord (build_string (synch_process_death
),
924 Vlocale_coding_system
, 0);
925 return make_number (synch_process_retcode
);
929 delete_temp_file (Lisp_Object name
)
931 /* Suppress jka-compr handling, etc. */
932 ptrdiff_t count
= SPECPDL_INDEX ();
933 specbind (intern ("file-name-handler-alist"), Qnil
);
934 internal_delete_file (name
);
935 unbind_to (count
, Qnil
);
939 DEFUN ("call-process-region", Fcall_process_region
, Scall_process_region
,
941 doc
: /* Send text from START to END to a synchronous process running PROGRAM.
942 The remaining arguments are optional.
943 Delete the text if fourth arg DELETE is non-nil.
945 Insert output in BUFFER before point; t means current buffer; nil for
946 BUFFER means discard it; 0 means discard and don't wait; and `(:file
947 FILE)', where FILE is a file name string, means that it should be
948 written to that file.
949 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
950 REAL-BUFFER says what to do with standard output, as above,
951 while STDERR-FILE says what to do with standard error in the child.
952 STDERR-FILE may be nil (discard standard error output),
953 t (mix it with ordinary output), or a file name string.
955 Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.
956 Remaining args are passed to PROGRAM at startup as command args.
958 If BUFFER is 0, `call-process-region' returns immediately with value nil.
959 Otherwise it waits for PROGRAM to terminate
960 and returns a numeric exit status or a signal description string.
961 If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
963 usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */)
964 (ptrdiff_t nargs
, Lisp_Object
*args
)
967 Lisp_Object filename_string
;
968 register Lisp_Object start
, end
;
969 ptrdiff_t count
= SPECPDL_INDEX ();
970 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
971 Lisp_Object coding_systems
;
972 Lisp_Object val
, *args2
;
975 Lisp_Object tmpdir
, pattern
;
977 if (STRINGP (Vtemporary_file_directory
))
978 tmpdir
= Vtemporary_file_directory
;
982 if (getenv ("TMPDIR"))
983 tmpdir
= build_string (getenv ("TMPDIR"));
985 tmpdir
= build_string ("/tmp/");
988 if ((outf
= egetenv ("TMPDIR"))
989 || (outf
= egetenv ("TMP"))
990 || (outf
= egetenv ("TEMP")))
991 tmpdir
= build_string (outf
);
993 tmpdir
= Ffile_name_as_directory (build_string ("c:/temp"));
999 pattern
= Fexpand_file_name (Vtemp_file_name_pattern
, tmpdir
);
1000 SAFE_ALLOCA (tempfile
, char *, SBYTES (pattern
) + 1);
1001 memcpy (tempfile
, SDATA (pattern
), SBYTES (pattern
) + 1);
1002 coding_systems
= Qt
;
1009 fd
= mkstemp (tempfile
);
1012 report_file_error ("Failed to open temporary file",
1013 Fcons (Vtemp_file_name_pattern
, Qnil
));
1021 filename_string
= build_string (tempfile
);
1022 GCPRO1 (filename_string
);
1028 /* Decide coding-system of the contents of the temporary file. */
1029 if (!NILP (Vcoding_system_for_write
))
1030 val
= Vcoding_system_for_write
;
1031 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
1036 SAFE_NALLOCA (args2
, 1, nargs
+ 1);
1037 args2
[0] = Qcall_process_region
;
1038 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1039 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1040 val
= CONSP (coding_systems
) ? XCDR (coding_systems
) : Qnil
;
1043 val
= complement_process_encoding_system (val
);
1046 ptrdiff_t count1
= SPECPDL_INDEX ();
1048 specbind (intern ("coding-system-for-write"), val
);
1049 /* POSIX lets mk[s]temp use "."; don't invoke jka-compr if we
1050 happen to get a ".Z" suffix. */
1051 specbind (intern ("file-name-handler-alist"), Qnil
);
1052 Fwrite_region (start
, end
, filename_string
, Qnil
, Qlambda
, Qnil
, Qnil
);
1054 unbind_to (count1
, Qnil
);
1057 /* Note that Fcall_process takes care of binding
1058 coding-system-for-read. */
1060 record_unwind_protect (delete_temp_file
, filename_string
);
1062 if (nargs
> 3 && !NILP (args
[3]))
1063 Fdelete_region (start
, end
);
1075 args
[1] = filename_string
;
1077 RETURN_UNGCPRO (unbind_to (count
, Fcall_process (nargs
, args
)));
1081 static int relocate_fd (int fd
, int minfd
);
1085 add_env (char **env
, char **new_env
, char *string
)
1092 /* See if this string duplicates any string already in the env.
1093 If so, don't put it in.
1094 When an env var has multiple definitions,
1095 we keep the definition that comes first in process-environment. */
1096 for (ep
= env
; ok
&& ep
!= new_env
; ep
++)
1098 char *p
= *ep
, *q
= string
;
1104 /* The string is a lone variable name; keep it for now, we
1105 will remove it later. It is a placeholder for a
1106 variable that is not to be included in the environment. */
1114 *new_env
++ = string
;
1118 /* This is the last thing run in a newly forked inferior
1119 either synchronous or asynchronous.
1120 Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2.
1121 Initialize inferior's priority, pgrp, connected dir and environment.
1122 then exec another program based on new_argv.
1124 This function may change environ for the superior process.
1125 Therefore, the superior process must save and restore the value
1126 of environ around the vfork and the call to this function.
1128 SET_PGRP is nonzero if we should put the subprocess into a separate
1131 CURRENT_DIR is an elisp string giving the path of the current
1132 directory the subprocess should have. Since we can't really signal
1133 a decent error from within the child, this should be verified as an
1134 executable directory by the parent. */
1137 child_setup (int in
, int out
, int err
, register char **new_argv
, int set_pgrp
, Lisp_Object current_dir
)
1144 #endif /* WINDOWSNT */
1146 pid_t pid
= getpid ();
1148 /* Close Emacs's descriptors that this process should not have. */
1149 close_process_descs ();
1151 /* DOS_NT isn't in a vfork, so if we are in the middle of load-file,
1152 we will lose if we call close_load_descs here. */
1154 close_load_descs ();
1157 /* Note that use of alloca is always safe here. It's obvious for systems
1158 that do not have true vfork or that have true (stack) alloca.
1159 If using vfork and C_ALLOCA (when Emacs used to include
1160 src/alloca.c) it is safe because that changes the superior's
1161 static variables as if the superior had done alloca and will be
1162 cleaned up in the usual way. */
1164 register char *temp
;
1165 size_t i
; /* size_t, because ptrdiff_t might overflow here! */
1167 i
= SBYTES (current_dir
);
1169 /* MSDOS must have all environment variables malloc'ed, because
1170 low-level libc functions that launch subsidiary processes rely
1172 pwd_var
= (char *) xmalloc (i
+ 6);
1174 pwd_var
= (char *) alloca (i
+ 6);
1177 memcpy (pwd_var
, "PWD=", 4);
1178 memcpy (temp
, SDATA (current_dir
), i
);
1179 if (!IS_DIRECTORY_SEP (temp
[i
- 1])) temp
[i
++] = DIRECTORY_SEP
;
1183 /* We can't signal an Elisp error here; we're in a vfork. Since
1184 the callers check the current directory before forking, this
1185 should only return an error if the directory's permissions
1186 are changed between the check and this chdir, but we should
1188 if (chdir (temp
) < 0)
1191 /* Get past the drive letter, so that d:/ is left alone. */
1192 if (i
> 2 && IS_DEVICE_SEP (temp
[1]) && IS_DIRECTORY_SEP (temp
[2]))
1199 /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */
1200 while (i
> 2 && IS_DIRECTORY_SEP (temp
[i
- 1]))
1204 /* Set `env' to a vector of the strings in the environment. */
1206 register Lisp_Object tem
;
1207 register char **new_env
;
1209 register int new_length
;
1210 Lisp_Object display
= Qnil
;
1214 for (tem
= Vprocess_environment
;
1215 CONSP (tem
) && STRINGP (XCAR (tem
));
1218 if (strncmp (SSDATA (XCAR (tem
)), "DISPLAY", 7) == 0
1219 && (SDATA (XCAR (tem
)) [7] == '\0'
1220 || SDATA (XCAR (tem
)) [7] == '='))
1221 /* DISPLAY is specified in process-environment. */
1226 /* If not provided yet, use the frame's DISPLAY. */
1229 Lisp_Object tmp
= Fframe_parameter (selected_frame
, Qdisplay
);
1230 if (!STRINGP (tmp
) && CONSP (Vinitial_environment
))
1231 /* If still not found, Look for DISPLAY in Vinitial_environment. */
1232 tmp
= Fgetenv_internal (build_string ("DISPLAY"),
1233 Vinitial_environment
);
1241 /* new_length + 2 to include PWD and terminating 0. */
1242 env
= new_env
= (char **) alloca ((new_length
+ 2) * sizeof (char *));
1243 /* If we have a PWD envvar, pass one down,
1244 but with corrected value. */
1245 if (egetenv ("PWD"))
1246 *new_env
++ = pwd_var
;
1248 if (STRINGP (display
))
1250 char *vdata
= (char *) alloca (sizeof "DISPLAY=" + SBYTES (display
));
1251 strcpy (vdata
, "DISPLAY=");
1252 strcat (vdata
, SSDATA (display
));
1253 new_env
= add_env (env
, new_env
, vdata
);
1257 for (tem
= Vprocess_environment
;
1258 CONSP (tem
) && STRINGP (XCAR (tem
));
1260 new_env
= add_env (env
, new_env
, SSDATA (XCAR (tem
)));
1264 /* Remove variable names without values. */
1268 while (*q
!= 0 && strchr (*q
, '=') == NULL
)
1278 prepare_standard_handles (in
, out
, err
, handles
);
1279 set_process_dir (SDATA (current_dir
));
1280 /* Spawn the child. (See ntproc.c:Spawnve). */
1281 cpid
= spawnve (_P_NOWAIT
, new_argv
[0], new_argv
, env
);
1282 reset_standard_handles (in
, out
, err
, handles
);
1284 /* An error occurred while trying to spawn the process. */
1285 report_file_error ("Spawning child process", Qnil
);
1288 #else /* not WINDOWSNT */
1289 /* Make sure that in, out, and err are not actually already in
1290 descriptors zero, one, or two; this could happen if Emacs is
1291 started with its standard in, out, or error closed, as might
1294 int oin
= in
, oout
= out
;
1296 /* We have to avoid relocating the same descriptor twice! */
1298 in
= relocate_fd (in
, 3);
1303 out
= relocate_fd (out
, 3);
1307 else if (err
== oout
)
1310 err
= relocate_fd (err
, 3);
1324 if (err
!= in
&& err
!= out
)
1328 #ifndef SETPGRP_RELEASES_CTTY
1329 setpgrp (); /* No arguments but equivalent in this case */
1333 #endif /* not USG */
1335 /* setpgrp_of_tty is incorrect here; it uses input_fd. */
1338 /* execvp does not accept an environment arg so the only way
1339 to pass this environment is to set environ. Our caller
1340 is responsible for restoring the ambient value of environ. */
1342 execvp (new_argv
[0], new_argv
);
1344 emacs_write (1, "Can't exec program: ", 20);
1345 emacs_write (1, new_argv
[0], strlen (new_argv
[0]));
1346 emacs_write (1, "\n", 1);
1350 pid
= run_msdos_command (new_argv
, pwd_var
+ 4, in
, out
, err
, env
);
1353 /* An error occurred while trying to run the subprocess. */
1354 report_file_error ("Spawning child process", Qnil
);
1357 #endif /* not WINDOWSNT */
1361 /* Move the file descriptor FD so that its number is not less than MINFD.
1362 If the file descriptor is moved at all, the original is freed. */
1364 relocate_fd (int fd
, int minfd
)
1372 new = fcntl (fd
, F_DUPFD
, minfd
);
1376 /* Note that we hold the original FD open while we recurse,
1377 to guarantee we'll get a new FD if we need it. */
1378 new = relocate_fd (new, minfd
);
1382 const char *message_1
= "Error while setting up child: ";
1383 const char *errmessage
= strerror (errno
);
1384 const char *message_2
= "\n";
1385 emacs_write (2, message_1
, strlen (message_1
));
1386 emacs_write (2, errmessage
, strlen (errmessage
));
1387 emacs_write (2, message_2
, strlen (message_2
));
1394 #endif /* not WINDOWSNT */
1397 getenv_internal_1 (const char *var
, ptrdiff_t varlen
, char **value
,
1398 ptrdiff_t *valuelen
, Lisp_Object env
)
1400 for (; CONSP (env
); env
= XCDR (env
))
1402 Lisp_Object entry
= XCAR (env
);
1404 && SBYTES (entry
) >= varlen
1406 /* NT environment variables are case insensitive. */
1407 && ! strnicmp (SDATA (entry
), var
, varlen
)
1408 #else /* not WINDOWSNT */
1409 && ! memcmp (SDATA (entry
), var
, varlen
)
1410 #endif /* not WINDOWSNT */
1413 if (SBYTES (entry
) > varlen
&& SREF (entry
, varlen
) == '=')
1415 *value
= SSDATA (entry
) + (varlen
+ 1);
1416 *valuelen
= SBYTES (entry
) - (varlen
+ 1);
1419 else if (SBYTES (entry
) == varlen
)
1421 /* Lone variable names in Vprocess_environment mean that
1422 variable should be removed from the environment. */
1432 getenv_internal (const char *var
, ptrdiff_t varlen
, char **value
,
1433 ptrdiff_t *valuelen
, Lisp_Object frame
)
1435 /* Try to find VAR in Vprocess_environment first. */
1436 if (getenv_internal_1 (var
, varlen
, value
, valuelen
,
1437 Vprocess_environment
))
1438 return *value
? 1 : 0;
1440 /* For DISPLAY try to get the values from the frame or the initial env. */
1441 if (strcmp (var
, "DISPLAY") == 0)
1444 = Fframe_parameter (NILP (frame
) ? selected_frame
: frame
, Qdisplay
);
1445 if (STRINGP (display
))
1447 *value
= SSDATA (display
);
1448 *valuelen
= SBYTES (display
);
1451 /* If still not found, Look for DISPLAY in Vinitial_environment. */
1452 if (getenv_internal_1 (var
, varlen
, value
, valuelen
,
1453 Vinitial_environment
))
1454 return *value
? 1 : 0;
1460 DEFUN ("getenv-internal", Fgetenv_internal
, Sgetenv_internal
, 1, 2, 0,
1461 doc
: /* Get the value of environment variable VARIABLE.
1462 VARIABLE should be a string. Value is nil if VARIABLE is undefined in
1463 the environment. Otherwise, value is a string.
1465 This function searches `process-environment' for VARIABLE.
1467 If optional parameter ENV is a list, then search this list instead of
1468 `process-environment', and return t when encountering a negative entry
1469 \(an entry for a variable with no value). */)
1470 (Lisp_Object variable
, Lisp_Object env
)
1475 CHECK_STRING (variable
);
1478 if (getenv_internal_1 (SSDATA (variable
), SBYTES (variable
),
1479 &value
, &valuelen
, env
))
1480 return value
? make_string (value
, valuelen
) : Qt
;
1484 else if (getenv_internal (SSDATA (variable
), SBYTES (variable
),
1485 &value
, &valuelen
, env
))
1486 return make_string (value
, valuelen
);
1491 /* A version of getenv that consults the Lisp environment lists,
1492 easily callable from C. */
1494 egetenv (const char *var
)
1499 if (getenv_internal (var
, strlen (var
), &value
, &valuelen
, Qnil
))
1506 /* This is run before init_cmdargs. */
1509 init_callproc_1 (void)
1511 char *data_dir
= egetenv ("EMACSDATA");
1512 char *doc_dir
= egetenv ("EMACSDOC");
1515 = Ffile_name_as_directory (build_string (data_dir
? data_dir
1518 = Ffile_name_as_directory (build_string (doc_dir
? doc_dir
1521 /* Check the EMACSPATH environment variable, defaulting to the
1522 PATH_EXEC path from epaths.h. */
1523 Vexec_path
= decode_env_path ("EMACSPATH", PATH_EXEC
);
1524 Vexec_directory
= Ffile_name_as_directory (Fcar (Vexec_path
));
1525 Vexec_path
= nconc2 (decode_env_path ("PATH", ""), Vexec_path
);
1528 /* This is run after init_cmdargs, when Vinstallation_directory is valid. */
1531 init_callproc (void)
1533 char *data_dir
= egetenv ("EMACSDATA");
1536 Lisp_Object tempdir
;
1538 if (!NILP (Vinstallation_directory
))
1540 /* Add to the path the lib-src subdir of the installation dir. */
1542 tem
= Fexpand_file_name (build_string ("lib-src"),
1543 Vinstallation_directory
);
1545 /* MSDOS uses wrapped binaries, so don't do this. */
1546 if (NILP (Fmember (tem
, Vexec_path
)))
1548 Vexec_path
= decode_env_path ("EMACSPATH", PATH_EXEC
);
1549 Vexec_path
= Fcons (tem
, Vexec_path
);
1550 Vexec_path
= nconc2 (decode_env_path ("PATH", ""), Vexec_path
);
1553 Vexec_directory
= Ffile_name_as_directory (tem
);
1554 #endif /* not DOS_NT */
1556 /* Maybe use ../etc as well as ../lib-src. */
1559 tem
= Fexpand_file_name (build_string ("etc"),
1560 Vinstallation_directory
);
1561 Vdoc_directory
= Ffile_name_as_directory (tem
);
1565 /* Look for the files that should be in etc. We don't use
1566 Vinstallation_directory, because these files are never installed
1567 near the executable, and they are never in the build
1568 directory when that's different from the source directory.
1570 Instead, if these files are not in the nominal place, we try the
1571 source directory. */
1574 Lisp_Object tem
, tem1
, srcdir
;
1576 srcdir
= Fexpand_file_name (build_string ("../src/"),
1577 build_string (PATH_DUMPLOADSEARCH
));
1578 tem
= Fexpand_file_name (build_string ("GNU"), Vdata_directory
);
1579 tem1
= Ffile_exists_p (tem
);
1580 if (!NILP (Fequal (srcdir
, Vinvocation_directory
)) || NILP (tem1
))
1583 newdir
= Fexpand_file_name (build_string ("../etc/"),
1584 build_string (PATH_DUMPLOADSEARCH
));
1585 tem
= Fexpand_file_name (build_string ("GNU"), newdir
);
1586 tem1
= Ffile_exists_p (tem
);
1588 Vdata_directory
= newdir
;
1596 tempdir
= Fdirectory_file_name (Vexec_directory
);
1597 if (access (SSDATA (tempdir
), 0) < 0)
1598 dir_warning ("Warning: arch-dependent data dir (%s) does not exist.\n",
1602 tempdir
= Fdirectory_file_name (Vdata_directory
);
1603 if (access (SSDATA (tempdir
), 0) < 0)
1604 dir_warning ("Warning: arch-independent data dir (%s) does not exist.\n",
1607 sh
= (char *) getenv ("SHELL");
1608 Vshell_file_name
= build_string (sh
? sh
: "/bin/sh");
1611 Vshared_game_score_directory
= Qnil
;
1613 Vshared_game_score_directory
= build_string (PATH_GAME
);
1614 if (NILP (Ffile_directory_p (Vshared_game_score_directory
)))
1615 Vshared_game_score_directory
= Qnil
;
1620 set_initial_environment (void)
1623 for (envp
= environ
; *envp
; envp
++)
1624 Vprocess_environment
= Fcons (build_string (*envp
),
1625 Vprocess_environment
);
1626 /* Ideally, the `copy' shouldn't be necessary, but it seems it's frequent
1627 to use `delete' and friends on process-environment. */
1628 Vinitial_environment
= Fcopy_sequence (Vprocess_environment
);
1632 syms_of_callproc (void)
1635 Vtemp_file_name_pattern
= build_string ("emacsXXXXXX");
1636 #elif defined (WINDOWSNT)
1637 Vtemp_file_name_pattern
= build_string ("emXXXXXX");
1639 Vtemp_file_name_pattern
= build_string ("detmp.XXX");
1641 staticpro (&Vtemp_file_name_pattern
);
1643 DEFVAR_LISP ("shell-file-name", Vshell_file_name
,
1644 doc
: /* *File name to load inferior shells from.
1645 Initialized from the SHELL environment variable, or to a system-dependent
1646 default if SHELL is not set. */);
1648 DEFVAR_LISP ("exec-path", Vexec_path
,
1649 doc
: /* *List of directories to search programs to run in subprocesses.
1650 Each element is a string (directory name) or nil (try default directory). */);
1652 DEFVAR_LISP ("exec-suffixes", Vexec_suffixes
,
1653 doc
: /* *List of suffixes to try to find executable file names.
1654 Each element is a string. */);
1655 Vexec_suffixes
= Qnil
;
1657 DEFVAR_LISP ("exec-directory", Vexec_directory
,
1658 doc
: /* Directory for executables for Emacs to invoke.
1659 More generally, this includes any architecture-dependent files
1660 that are built and installed from the Emacs distribution. */);
1662 DEFVAR_LISP ("data-directory", Vdata_directory
,
1663 doc
: /* Directory of machine-independent files that come with GNU Emacs.
1664 These are files intended for Emacs to use while it runs. */);
1666 DEFVAR_LISP ("doc-directory", Vdoc_directory
,
1667 doc
: /* Directory containing the DOC file that comes with GNU Emacs.
1668 This is usually the same as `data-directory'. */);
1670 DEFVAR_LISP ("configure-info-directory", Vconfigure_info_directory
,
1671 doc
: /* For internal use by the build procedure only.
1672 This is the name of the directory in which the build procedure installed
1673 Emacs's info files; the default value for `Info-default-directory-list'
1675 Vconfigure_info_directory
= build_string (PATH_INFO
);
1677 DEFVAR_LISP ("shared-game-score-directory", Vshared_game_score_directory
,
1678 doc
: /* Directory of score files for games which come with GNU Emacs.
1679 If this variable is nil, then Emacs is unable to use a shared directory. */);
1681 Vshared_game_score_directory
= Qnil
;
1683 Vshared_game_score_directory
= build_string (PATH_GAME
);
1686 DEFVAR_LISP ("initial-environment", Vinitial_environment
,
1687 doc
: /* List of environment variables inherited from the parent process.
1688 Each element should be a string of the form ENVVARNAME=VALUE.
1689 The elements must normally be decoded (using `locale-coding-system') for use. */);
1690 Vinitial_environment
= Qnil
;
1692 DEFVAR_LISP ("process-environment", Vprocess_environment
,
1693 doc
: /* List of overridden environment variables for subprocesses to inherit.
1694 Each element should be a string of the form ENVVARNAME=VALUE.
1696 Entries in this list take precedence to those in the frame-local
1697 environments. Therefore, let-binding `process-environment' is an easy
1698 way to temporarily change the value of an environment variable,
1699 irrespective of where it comes from. To use `process-environment' to
1700 remove an environment variable, include only its name in the list,
1703 This variable is set to nil when Emacs starts.
1705 If multiple entries define the same variable, the first one always
1708 Non-ASCII characters are encoded according to the initial value of
1709 `locale-coding-system', i.e. the elements must normally be decoded for
1712 See `setenv' and `getenv'. */);
1713 Vprocess_environment
= Qnil
;
1715 defsubr (&Scall_process
);
1716 defsubr (&Sgetenv_internal
);
1717 defsubr (&Scall_process_region
);