1 /* Synchronous subprocess invocation for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1999, 2000, 2001,
3 2002, 2003, 2004, 2005 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 2, or (at your option)
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; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
32 /* Define SIGCHLD as an alias for SIGCLD. */
34 #if !defined (SIGCHLD) && defined (SIGCLD)
35 #define SIGCHLD SIGCLD
38 #include <sys/types.h>
46 #define INCLUDED_FCNTL
53 #include <stdlib.h> /* for proper declaration of environ */
56 #define _P_NOWAIT 1 /* from process.h */
59 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
60 #define INCLUDED_FCNTL
63 #include <sys/param.h>
78 #include "character.h"
81 #include "composite.h"
84 #include "syssignal.h"
86 #include "blockinput.h"
93 extern noshare
char **environ
;
96 extern char **environ
;
101 #if !defined (USG) || defined (BSD_PGRPS)
103 #define setpgrp setpgid
107 Lisp_Object Vexec_path
, Vexec_directory
, Vexec_suffixes
;
108 Lisp_Object Vdata_directory
, Vdoc_directory
;
109 Lisp_Object Vconfigure_info_directory
, Vshared_game_score_directory
;
110 Lisp_Object Vtemp_file_name_pattern
;
112 Lisp_Object Vshell_file_name
;
114 Lisp_Object Vprocess_environment
;
117 Lisp_Object Qbuffer_file_type
;
120 /* True iff we are about to fork off a synchronous process or if we
121 are waiting for it. */
122 int synch_process_alive
;
124 /* Nonzero => this is a string explaining death of synchronous subprocess. */
125 char *synch_process_death
;
127 /* Nonzero => this is the signal number that terminated the subprocess. */
128 int synch_process_termsig
;
130 /* If synch_process_death is zero,
131 this is exit code of synchronous subprocess. */
132 int synch_process_retcode
;
134 /* Clean up when exiting Fcall_process.
135 On MSDOS, delete the temporary file on any kind of termination.
136 On Unix, kill the process and any children on termination by signal. */
138 /* Nonzero if this is termination due to exit. */
139 static int call_process_exited
;
141 #ifndef VMS /* VMS version is in vmsproc.c. */
144 call_process_kill (fdpid
)
147 emacs_close (XFASTINT (Fcar (fdpid
)));
148 EMACS_KILLPG (XFASTINT (Fcdr (fdpid
)), SIGKILL
);
149 synch_process_alive
= 0;
154 call_process_cleanup (fdpid
)
157 #if defined (MSDOS) || defined (MAC_OS8)
158 /* for MSDOS fdpid is really (fd . tempfile) */
159 register Lisp_Object file
;
161 emacs_close (XFASTINT (Fcar (fdpid
)));
162 if (strcmp (SDATA (file
), NULL_DEVICE
) != 0)
163 unlink (SDATA (file
));
164 #else /* not MSDOS and not MAC_OS8 */
165 register int pid
= XFASTINT (Fcdr (fdpid
));
167 if (call_process_exited
)
169 emacs_close (XFASTINT (Fcar (fdpid
)));
173 if (EMACS_KILLPG (pid
, SIGINT
) == 0)
175 int count
= SPECPDL_INDEX ();
176 record_unwind_protect (call_process_kill
, fdpid
);
177 message1 ("Waiting for process to die...(type C-g again to kill it instantly)");
180 wait_for_termination (pid
);
182 specpdl_ptr
= specpdl
+ count
; /* Discard the unwind protect. */
183 message1 ("Waiting for process to die...done");
185 synch_process_alive
= 0;
186 emacs_close (XFASTINT (Fcar (fdpid
)));
187 #endif /* not MSDOS */
191 DEFUN ("call-process", Fcall_process
, Scall_process
, 1, MANY
, 0,
192 doc
: /* Call PROGRAM synchronously in separate process.
193 The remaining arguments are optional.
194 The program's input comes from file INFILE (nil means `/dev/null').
195 Insert output in BUFFER before point; t means current buffer;
196 nil for BUFFER means discard it; 0 means discard and don't wait.
197 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
198 REAL-BUFFER says what to do with standard output, as above,
199 while STDERR-FILE says what to do with standard error in the child.
200 STDERR-FILE may be nil (discard standard error output),
201 t (mix it with ordinary output), or a file name string.
203 Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.
204 Remaining arguments are strings passed as command arguments to PROGRAM.
206 If BUFFER is 0, `call-process' returns immediately with value nil.
207 Otherwise it waits for PROGRAM to terminate
208 and returns a numeric exit status or a signal description string.
209 If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
211 usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */)
214 register Lisp_Object
*args
;
216 Lisp_Object infile
, buffer
, current_dir
, path
;
223 int bufsize
= sizeof buf
;
224 int count
= SPECPDL_INDEX ();
226 register const unsigned char **new_argv
227 = (const unsigned char **) alloca ((max (2, nargs
- 2)) * sizeof (char *));
228 struct buffer
*old
= current_buffer
;
229 /* File to use for stderr in the child.
230 t means use same as standard output. */
231 Lisp_Object error_file
;
232 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
233 char *outf
, *tempfile
;
243 struct coding_system process_coding
; /* coding-system of process output */
244 struct coding_system argument_coding
; /* coding-system of arguments */
245 /* Set to the return value of Ffind_operation_coding_system. */
246 Lisp_Object coding_systems
;
248 /* Qt denotes that Ffind_operation_coding_system is not yet called. */
251 CHECK_STRING (args
[0]);
256 /* Without asynchronous processes we cannot have BUFFER == 0. */
258 && (INTEGERP (CONSP (args
[2]) ? XCAR (args
[2]) : args
[2])))
259 error ("Operating system cannot handle asynchronous subprocesses");
260 #endif /* subprocesses */
262 /* Decide the coding-system for giving arguments. */
264 Lisp_Object val
, *args2
;
267 /* If arguments are supplied, we may have to encode them. */
272 for (i
= 4; i
< nargs
; i
++)
273 CHECK_STRING (args
[i
]);
275 for (i
= 4; i
< nargs
; i
++)
276 if (STRING_MULTIBYTE (args
[i
]))
279 if (!NILP (Vcoding_system_for_write
))
280 val
= Vcoding_system_for_write
;
281 else if (! must_encode
)
285 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
286 args2
[0] = Qcall_process
;
287 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
288 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
289 if (CONSP (coding_systems
))
290 val
= XCDR (coding_systems
);
291 else if (CONSP (Vdefault_process_coding_system
))
292 val
= XCDR (Vdefault_process_coding_system
);
296 setup_coding_system (Fcheck_coding_system (val
), &argument_coding
);
300 if (nargs
>= 2 && ! NILP (args
[1]))
302 infile
= Fexpand_file_name (args
[1], current_buffer
->directory
);
303 CHECK_STRING (infile
);
306 infile
= build_string (NULL_DEVICE
);
312 /* If BUFFER is a list, its meaning is
313 (BUFFER-FOR-STDOUT FILE-FOR-STDERR). */
316 if (CONSP (XCDR (buffer
)))
318 Lisp_Object stderr_file
;
319 stderr_file
= XCAR (XCDR (buffer
));
321 if (NILP (stderr_file
) || EQ (Qt
, stderr_file
))
322 error_file
= stderr_file
;
324 error_file
= Fexpand_file_name (stderr_file
, Qnil
);
327 buffer
= XCAR (buffer
);
330 if (!(EQ (buffer
, Qnil
)
332 || INTEGERP (buffer
)))
334 Lisp_Object spec_buffer
;
335 spec_buffer
= buffer
;
336 buffer
= Fget_buffer_create (buffer
);
337 /* Mention the buffer name for a better error message. */
339 CHECK_BUFFER (spec_buffer
);
340 CHECK_BUFFER (buffer
);
346 /* Make sure that the child will be able to chdir to the current
347 buffer's current directory, or its unhandled equivalent. We
348 can't just have the child check for an error when it does the
349 chdir, since it's in a vfork.
351 We have to GCPRO around this because Fexpand_file_name,
352 Funhandled_file_name_directory, and Ffile_accessible_directory_p
353 might call a file name handling function. The argument list is
354 protected by the caller, so all we really have to worry about is
357 struct gcpro gcpro1
, gcpro2
, gcpro3
;
359 current_dir
= current_buffer
->directory
;
361 GCPRO3 (infile
, buffer
, current_dir
);
364 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
366 if (NILP (Ffile_accessible_directory_p (current_dir
)))
367 report_file_error ("Setting current directory",
368 Fcons (current_buffer
->directory
, Qnil
));
373 display_p
= INTERACTIVE
&& nargs
>= 4 && !NILP (args
[3]);
375 filefd
= emacs_open (SDATA (infile
), O_RDONLY
, 0);
378 report_file_error ("Opening process input file", Fcons (infile
, Qnil
));
380 /* Search for program; barf if not found. */
384 GCPRO1 (current_dir
);
385 openp (Vexec_path
, args
[0], Vexec_suffixes
, &path
, make_number (X_OK
));
390 emacs_close (filefd
);
391 report_file_error ("Searching for program", Fcons (args
[0], Qnil
));
394 /* If program file name starts with /: for quoting a magic name,
396 if (SBYTES (path
) > 2 && SREF (path
, 0) == '/'
397 && SREF (path
, 1) == ':')
398 path
= Fsubstring (path
, make_number (2), Qnil
);
400 new_argv
[0] = SDATA (path
);
404 struct gcpro gcpro1
, gcpro2
, gcpro3
;
406 GCPRO3 (infile
, buffer
, current_dir
);
407 argument_coding
.dst_multibyte
= 0;
408 for (i
= 4; i
< nargs
; i
++)
410 argument_coding
.src_multibyte
= STRING_MULTIBYTE (args
[i
]);
411 if (CODING_REQUIRE_ENCODING (&argument_coding
))
412 /* We must encode this argument. */
413 args
[i
] = encode_coding_string (&argument_coding
, args
[i
], 1);
414 new_argv
[i
- 3] = SDATA (args
[i
]);
417 new_argv
[nargs
- 3] = 0;
422 #ifdef MSDOS /* MW, July 1993 */
423 if ((outf
= egetenv ("TMPDIR")))
424 strcpy (tempfile
= alloca (strlen (outf
) + 20), outf
);
427 tempfile
= alloca (20);
430 dostounix_filename (tempfile
);
431 if (*tempfile
== '\0' || tempfile
[strlen (tempfile
) - 1] != '/')
432 strcat (tempfile
, "/");
433 strcat (tempfile
, "detmp.XXX");
436 outfilefd
= creat (tempfile
, S_IREAD
| S_IWRITE
);
439 emacs_close (filefd
);
440 report_file_error ("Opening process output file",
441 Fcons (build_string (tempfile
), Qnil
));
448 /* Since we don't have pipes on the Mac, create a temporary file to
449 hold the output of the subprocess. */
450 tempfile
= (char *) alloca (SBYTES (Vtemp_file_name_pattern
) + 1);
451 bcopy (SDATA (Vtemp_file_name_pattern
), tempfile
,
452 SBYTES (Vtemp_file_name_pattern
) + 1);
456 outfilefd
= creat (tempfile
, S_IREAD
| S_IWRITE
);
460 report_file_error ("Opening process output file",
461 Fcons (build_string (tempfile
), Qnil
));
467 if (INTEGERP (buffer
))
468 fd
[1] = emacs_open (NULL_DEVICE
, O_WRONLY
, 0), fd
[0] = -1;
476 emacs_close (filefd
);
477 report_file_error ("Creating process pipe", Qnil
);
482 /* Replaced by close_process_descs */
483 set_exclusive_use (fd
[0]);
488 /* child_setup must clobber environ in systems with true vfork.
489 Protect it from permanent change. */
490 register char **save_environ
= environ
;
491 register int fd1
= fd
[1];
494 #if 0 /* Some systems don't have sigblock. */
495 mask
= sigblock (sigmask (SIGCHLD
));
498 /* Record that we're about to create a synchronous process. */
499 synch_process_alive
= 1;
501 /* These vars record information from process termination.
502 Clear them now before process can possibly terminate,
503 to avoid timing error if process terminates soon. */
504 synch_process_death
= 0;
505 synch_process_retcode
= 0;
506 synch_process_termsig
= 0;
508 if (NILP (error_file
))
509 fd_error
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
510 else if (STRINGP (error_file
))
513 fd_error
= emacs_open (SDATA (error_file
),
514 O_WRONLY
| O_TRUNC
| O_CREAT
| O_TEXT
,
516 #else /* not DOS_NT */
517 fd_error
= creat (SDATA (error_file
), 0666);
518 #endif /* not DOS_NT */
523 emacs_close (filefd
);
531 report_file_error ("Cannot redirect stderr",
532 Fcons ((NILP (error_file
)
533 ? build_string (NULL_DEVICE
) : error_file
),
537 current_dir
= ENCODE_FILE (current_dir
);
541 /* Call run_mac_command in sysdep.c here directly instead of doing
542 a child_setup as for MSDOS and other platforms. Note that this
543 code does not handle passing the environment to the synchronous
545 char *infn
, *outfn
, *errfn
, *currdn
;
547 /* close these files so subprocess can write to them */
549 if (fd_error
!= outfilefd
)
551 fd1
= -1; /* No harm in closing that one! */
553 infn
= SDATA (infile
);
555 if (NILP (error_file
))
557 else if (EQ (Qt
, error_file
))
560 errfn
= SDATA (error_file
);
561 currdn
= SDATA (current_dir
);
562 pid
= run_mac_command (new_argv
, currdn
, infn
, outfn
, errfn
);
564 /* Record that the synchronous process exited and note its
565 termination status. */
566 synch_process_alive
= 0;
567 synch_process_retcode
= pid
;
568 if (synch_process_retcode
< 0) /* means it couldn't be exec'ed */
570 synchronize_system_messages_locale ();
571 synch_process_death
= strerror (errno
);
574 /* Since CRLF is converted to LF within `decode_coding', we can
575 always open a file with binary mode. */
576 fd
[0] = open (tempfile
, O_BINARY
);
581 report_file_error ("Cannot re-open temporary file", Qnil
);
584 #else /* not MAC_OS8 */
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 we assign it to `synch_process_retcode'
589 pid
= child_setup (filefd
, outfilefd
, fd_error
, (char **) new_argv
,
592 /* Record that the synchronous process exited and note its
593 termination status. */
594 synch_process_alive
= 0;
595 synch_process_retcode
= pid
;
596 if (synch_process_retcode
< 0) /* means it couldn't be exec'ed */
598 synchronize_system_messages_locale ();
599 synch_process_death
= strerror (errno
);
602 emacs_close (outfilefd
);
603 if (fd_error
!= outfilefd
)
604 emacs_close (fd_error
);
605 fd1
= -1; /* No harm in closing that one! */
606 /* Since CRLF is converted to LF within `decode_coding', we can
607 always open a file with binary mode. */
608 fd
[0] = emacs_open (tempfile
, O_RDONLY
| O_BINARY
, 0);
612 emacs_close (filefd
);
613 report_file_error ("Cannot re-open temporary file", Qnil
);
615 #else /* not MSDOS */
617 pid
= child_setup (filefd
, fd1
, fd_error
, (char **) new_argv
,
619 #else /* not WINDOWSNT */
631 #if defined (USG) && !defined (BSD_PGRPS)
636 child_setup (filefd
, fd1
, fd_error
, (char **) new_argv
,
641 #endif /* not WINDOWSNT */
643 /* The MSDOS case did this already. */
645 emacs_close (fd_error
);
646 #endif /* not MSDOS */
647 #endif /* not MAC_OS8 */
649 environ
= save_environ
;
651 /* Close most of our fd's, but not fd[0]
652 since we will use that to read input from. */
653 emacs_close (filefd
);
654 if (fd1
>= 0 && fd1
!= fd_error
)
662 report_file_error ("Doing vfork", Qnil
);
665 if (INTEGERP (buffer
))
670 /* If Emacs has been built with asynchronous subprocess support,
671 we don't need to do this, I think because it will then have
672 the facilities for handling SIGCHLD. */
673 wait_without_blocking ();
674 #endif /* subprocesses */
678 /* Enable sending signal if user quits below. */
679 call_process_exited
= 0;
681 #if defined(MSDOS) || defined(MAC_OS8)
682 /* MSDOS needs different cleanup information. */
683 record_unwind_protect (call_process_cleanup
,
684 Fcons (make_number (fd
[0]), build_string (tempfile
)));
686 record_unwind_protect (call_process_cleanup
,
687 Fcons (make_number (fd
[0]), make_number (pid
)));
688 #endif /* not MSDOS and not MAC_OS8 */
691 if (BUFFERP (buffer
))
692 Fset_buffer (buffer
);
696 /* If BUFFER is nil, we must read process output once and then
697 discard it, so setup coding system but with nil. */
698 setup_coding_system (Qnil
, &process_coding
);
702 Lisp_Object val
, *args2
;
705 if (!NILP (Vcoding_system_for_read
))
706 val
= Vcoding_system_for_read
;
709 if (EQ (coding_systems
, Qt
))
713 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
714 args2
[0] = Qcall_process
;
715 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
717 = Ffind_operation_coding_system (nargs
+ 1, args2
);
719 if (CONSP (coding_systems
))
720 val
= XCAR (coding_systems
);
721 else if (CONSP (Vdefault_process_coding_system
))
722 val
= XCAR (Vdefault_process_coding_system
);
726 Fcheck_coding_system (val
);
727 /* In unibyte mode, character code conversion should not take
728 place but EOL conversion should. So, setup raw-text or one
729 of the subsidiary according to the information just setup. */
730 if (NILP (current_buffer
->enable_multibyte_characters
)
732 val
= raw_text_coding_system (val
);
733 setup_coding_system (val
, &process_coding
);
744 int display_on_the_fly
= display_p
;
745 struct coding_system saved_coding
;
747 saved_coding
= process_coding
;
750 /* Repeatedly read until we've filled as much as possible
751 of the buffer size we have. But don't read
752 less than 1024--save that for the next bufferful. */
754 while (nread
< bufsize
- 1024)
756 int this_read
= emacs_read (fd
[0], bufptr
+ nread
,
764 process_coding
.mode
|= CODING_MODE_LAST_BLOCK
;
769 total_read
+= this_read
;
771 if (display_on_the_fly
)
775 /* Now NREAD is the total amount of data in the buffer. */
780 if (NILP (current_buffer
->enable_multibyte_characters
)
781 && ! CODING_MAY_REQUIRE_DECODING (&process_coding
))
782 insert_1_both (bufptr
, nread
, nread
, 0, 1, 0);
784 { /* We have to decode the input. */
787 XSETBUFFER (buf
, current_buffer
);
788 decode_coding_c_string (&process_coding
, bufptr
, nread
,
790 if (display_on_the_fly
791 && CODING_REQUIRE_DETECTION (&saved_coding
)
792 && ! CODING_REQUIRE_DETECTION (&process_coding
))
794 /* We have detected some coding system. But,
795 there's a possibility that the detection was
796 done by insufficient data. So, we give up
797 displaying on the fly. */
798 if (process_coding
.produced
> 0)
799 del_range_2 (process_coding
.dst_pos
,
800 process_coding
.dst_pos_byte
,
801 process_coding
.dst_pos
802 + process_coding
.produced_char
,
803 process_coding
.dst_pos_byte
804 + process_coding
.produced
, 0);
805 display_on_the_fly
= 0;
806 process_coding
= saved_coding
;
808 /* This is to make the above condition always
809 fails in the future. */
810 saved_coding
.common_flags
811 &= ~CODING_REQUIRE_DETECTION_MASK
;
815 TEMP_SET_PT_BOTH (PT
+ process_coding
.produced_char
,
816 PT_BYTE
+ process_coding
.produced
);
817 carryover
= process_coding
.carryover_bytes
;
819 /* As CARRYOVER should not be that large, we had
820 better avoid overhead of bcopy. */
821 BCOPY_SHORT (process_coding
.carryover
, bufptr
,
822 process_coding
.carryover_bytes
);
826 if (process_coding
.mode
& CODING_MODE_LAST_BLOCK
)
829 /* Make the buffer bigger as we continue to read more data,
831 if (bufsize
< 64 * 1024 && total_read
> 32 * bufsize
)
836 tempptr
= (char *) alloca (bufsize
);
837 bcopy (bufptr
, tempptr
, bufsize
/ 2);
844 prepare_menu_bars ();
846 redisplay_preserve_echo_area (1);
847 /* This variable might have been set to 0 for code
848 detection. In that case, we set it back to 1 because
849 we should have already detected a coding system. */
850 display_on_the_fly
= 1;
857 Vlast_coding_system_used
= CODING_ID_NAME (process_coding
.id
);
858 /* If the caller required, let the buffer inherit the
859 coding-system used to decode the process output. */
860 if (inherit_process_coding_system
)
861 call1 (intern ("after-insert-file-set-buffer-file-coding-system"),
862 make_number (total_read
));
865 /* Wait for it to terminate, unless it already has. */
866 wait_for_termination (pid
);
870 set_buffer_internal (old
);
872 /* Don't kill any children that the subprocess may have left behind
874 call_process_exited
= 1;
876 unbind_to (count
, Qnil
);
878 if (synch_process_termsig
)
882 synchronize_system_messages_locale ();
883 signame
= strsignal (synch_process_termsig
);
888 synch_process_death
= signame
;
891 if (synch_process_death
)
892 return code_convert_string_norecord (build_string (synch_process_death
),
893 Vlocale_coding_system
, 0);
894 return make_number (synch_process_retcode
);
899 delete_temp_file (name
)
902 /* Use Fdelete_file (indirectly) because that runs a file name handler.
903 We did that when writing the file, so we should do so when deleting. */
904 internal_delete_file (name
);
908 DEFUN ("call-process-region", Fcall_process_region
, Scall_process_region
,
910 doc
: /* Send text from START to END to a synchronous process running PROGRAM.
911 The remaining arguments are optional.
912 Delete the text if fourth arg DELETE is non-nil.
914 Insert output in BUFFER before point; t means current buffer;
915 nil for BUFFER means discard it; 0 means discard and don't wait.
916 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
917 REAL-BUFFER says what to do with standard output, as above,
918 while STDERR-FILE says what to do with standard error in the child.
919 STDERR-FILE may be nil (discard standard error output),
920 t (mix it with ordinary output), or a file name string.
922 Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.
923 Remaining args are passed to PROGRAM at startup as command args.
925 If BUFFER is 0, `call-process-region' returns immediately with value nil.
926 Otherwise it waits for PROGRAM to terminate
927 and returns a numeric exit status or a signal description string.
928 If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
930 usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */)
933 register Lisp_Object
*args
;
936 Lisp_Object filename_string
;
937 register Lisp_Object start
, end
;
938 int count
= SPECPDL_INDEX ();
939 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
940 Lisp_Object coding_systems
;
941 Lisp_Object val
, *args2
;
947 if ((outf
= egetenv ("TMPDIR"))
948 || (outf
= egetenv ("TMP"))
949 || (outf
= egetenv ("TEMP")))
950 strcpy (tempfile
= alloca (strlen (outf
) + 20), outf
);
953 tempfile
= alloca (20);
956 if (!IS_DIRECTORY_SEP (tempfile
[strlen (tempfile
) - 1]))
957 strcat (tempfile
, "/");
958 if ('/' == DIRECTORY_SEP
)
959 dostounix_filename (tempfile
);
961 unixtodos_filename (tempfile
);
963 strcat (tempfile
, "emXXXXXX");
965 strcat (tempfile
, "detmp.XXX");
967 #else /* not DOS_NT */
968 char *tempfile
= (char *) alloca (SBYTES (Vtemp_file_name_pattern
) + 1);
969 bcopy (SDATA (Vtemp_file_name_pattern
), tempfile
,
970 SBYTES (Vtemp_file_name_pattern
) + 1);
971 #endif /* not DOS_NT */
977 int fd
= mkstemp (tempfile
);
979 report_file_error ("Failed to open temporary file",
980 Fcons (Vtemp_file_name_pattern
, Qnil
));
988 filename_string
= build_string (tempfile
);
989 GCPRO1 (filename_string
);
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 (current_buffer
->enable_multibyte_characters
))
999 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1000 args2
[0] = Qcall_process_region
;
1001 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1002 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1003 if (CONSP (coding_systems
))
1004 val
= XCDR (coding_systems
);
1005 else if (CONSP (Vdefault_process_coding_system
))
1006 val
= XCDR (Vdefault_process_coding_system
);
1012 int count1
= SPECPDL_INDEX ();
1014 specbind (intern ("coding-system-for-write"), val
);
1015 Fwrite_region (start
, end
, filename_string
, Qnil
, Qlambda
, Qnil
, Qnil
);
1017 unbind_to (count1
, Qnil
);
1020 /* Note that Fcall_process takes care of binding
1021 coding-system-for-read. */
1023 record_unwind_protect (delete_temp_file
, filename_string
);
1025 if (nargs
> 3 && !NILP (args
[3]))
1026 Fdelete_region (start
, end
);
1038 args
[1] = filename_string
;
1040 RETURN_UNGCPRO (unbind_to (count
, Fcall_process (nargs
, args
)));
1043 #ifndef VMS /* VMS version is in vmsproc.c. */
1045 static int relocate_fd ();
1047 /* This is the last thing run in a newly forked inferior
1048 either synchronous or asynchronous.
1049 Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2.
1050 Initialize inferior's priority, pgrp, connected dir and environment.
1051 then exec another program based on new_argv.
1053 This function may change environ for the superior process.
1054 Therefore, the superior process must save and restore the value
1055 of environ around the vfork and the call to this function.
1057 SET_PGRP is nonzero if we should put the subprocess into a separate
1060 CURRENT_DIR is an elisp string giving the path of the current
1061 directory the subprocess should have. Since we can't really signal
1062 a decent error from within the child, this should be verified as an
1063 executable directory by the parent. */
1066 child_setup (in
, out
, err
, new_argv
, set_pgrp
, current_dir
)
1068 register char **new_argv
;
1070 Lisp_Object current_dir
;
1077 #endif /* WINDOWSNT */
1079 int pid
= getpid ();
1081 #ifdef SET_EMACS_PRIORITY
1083 extern EMACS_INT emacs_priority
;
1085 if (emacs_priority
< 0)
1086 nice (- emacs_priority
);
1091 /* Close Emacs's descriptors that this process should not have. */
1092 close_process_descs ();
1094 /* DOS_NT isn't in a vfork, so if we are in the middle of load-file,
1095 we will lose if we call close_load_descs here. */
1097 close_load_descs ();
1100 /* Note that use of alloca is always safe here. It's obvious for systems
1101 that do not have true vfork or that have true (stack) alloca.
1102 If using vfork and C_ALLOCA it is safe because that changes
1103 the superior's static variables as if the superior had done alloca
1104 and will be cleaned up in the usual way. */
1106 register char *temp
;
1109 i
= SBYTES (current_dir
);
1111 /* MSDOS must have all environment variables malloc'ed, because
1112 low-level libc functions that launch subsidiary processes rely
1114 pwd_var
= (char *) xmalloc (i
+ 6);
1116 pwd_var
= (char *) alloca (i
+ 6);
1119 bcopy ("PWD=", pwd_var
, 4);
1120 bcopy (SDATA (current_dir
), temp
, i
);
1121 if (!IS_DIRECTORY_SEP (temp
[i
- 1])) temp
[i
++] = DIRECTORY_SEP
;
1125 /* We can't signal an Elisp error here; we're in a vfork. Since
1126 the callers check the current directory before forking, this
1127 should only return an error if the directory's permissions
1128 are changed between the check and this chdir, but we should
1130 if (chdir (temp
) < 0)
1135 /* Get past the drive letter, so that d:/ is left alone. */
1136 if (i
> 2 && IS_DEVICE_SEP (temp
[1]) && IS_DIRECTORY_SEP (temp
[2]))
1143 /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */
1144 while (i
> 2 && IS_DIRECTORY_SEP (temp
[i
- 1]))
1148 /* Set `env' to a vector of the strings in Vprocess_environment. */
1150 register Lisp_Object tem
;
1151 register char **new_env
;
1152 register int new_length
;
1155 for (tem
= Vprocess_environment
;
1156 CONSP (tem
) && STRINGP (XCAR (tem
));
1160 /* new_length + 2 to include PWD and terminating 0. */
1161 env
= new_env
= (char **) alloca ((new_length
+ 2) * sizeof (char *));
1163 /* If we have a PWD envvar, pass one down,
1164 but with corrected value. */
1166 *new_env
++ = pwd_var
;
1168 /* Copy the Vprocess_environment strings into new_env. */
1169 for (tem
= Vprocess_environment
;
1170 CONSP (tem
) && STRINGP (XCAR (tem
));
1174 char *string
= (char *) SDATA (XCAR (tem
));
1175 /* See if this string duplicates any string already in the env.
1176 If so, don't put it in.
1177 When an env var has multiple definitions,
1178 we keep the definition that comes first in process-environment. */
1179 for (; ep
!= new_env
; ep
++)
1181 char *p
= *ep
, *q
= string
;
1185 /* The string is malformed; might as well drop it. */
1194 *new_env
++ = string
;
1200 prepare_standard_handles (in
, out
, err
, handles
);
1201 set_process_dir (SDATA (current_dir
));
1202 #else /* not WINDOWSNT */
1203 /* Make sure that in, out, and err are not actually already in
1204 descriptors zero, one, or two; this could happen if Emacs is
1205 started with its standard in, out, or error closed, as might
1208 int oin
= in
, oout
= out
;
1210 /* We have to avoid relocating the same descriptor twice! */
1212 in
= relocate_fd (in
, 3);
1217 out
= relocate_fd (out
, 3);
1221 else if (err
== oout
)
1224 err
= relocate_fd (err
, 3);
1238 #endif /* not MSDOS */
1239 #endif /* not WINDOWSNT */
1241 #if defined(USG) && !defined(BSD_PGRPS)
1242 #ifndef SETPGRP_RELEASES_CTTY
1243 setpgrp (); /* No arguments but equivalent in this case */
1248 /* setpgrp_of_tty is incorrect here; it uses input_fd. */
1249 EMACS_SET_TTY_PGRP (0, &pid
);
1252 pid
= run_msdos_command (new_argv
, pwd_var
+ 4, in
, out
, err
, env
);
1255 /* An error occurred while trying to run the subprocess. */
1256 report_file_error ("Spawning child process", Qnil
);
1258 #else /* not MSDOS */
1260 /* Spawn the child. (See ntproc.c:Spawnve). */
1261 cpid
= spawnve (_P_NOWAIT
, new_argv
[0], new_argv
, env
);
1262 reset_standard_handles (in
, out
, err
, handles
);
1264 /* An error occurred while trying to spawn the process. */
1265 report_file_error ("Spawning child process", Qnil
);
1267 #else /* not WINDOWSNT */
1268 /* execvp does not accept an environment arg so the only way
1269 to pass this environment is to set environ. Our caller
1270 is responsible for restoring the ambient value of environ. */
1272 execvp (new_argv
[0], new_argv
);
1274 emacs_write (1, "Can't exec program: ", 20);
1275 emacs_write (1, new_argv
[0], strlen (new_argv
[0]));
1276 emacs_write (1, "\n", 1);
1278 #endif /* not WINDOWSNT */
1279 #endif /* not MSDOS */
1282 /* Move the file descriptor FD so that its number is not less than MINFD.
1283 If the file descriptor is moved at all, the original is freed. */
1285 relocate_fd (fd
, minfd
)
1295 char *message1
= "Error while setting up child: ";
1296 char *errmessage
= strerror (errno
);
1297 char *message2
= "\n";
1298 emacs_write (2, message1
, strlen (message1
));
1299 emacs_write (2, errmessage
, strlen (errmessage
));
1300 emacs_write (2, message2
, strlen (message2
));
1303 /* Note that we hold the original FD open while we recurse,
1304 to guarantee we'll get a new FD if we need it. */
1305 new = relocate_fd (new, minfd
);
1312 getenv_internal (var
, varlen
, value
, valuelen
)
1320 for (scan
= Vprocess_environment
; CONSP (scan
); scan
= XCDR (scan
))
1324 entry
= XCAR (scan
);
1326 && SBYTES (entry
) > varlen
1327 && SREF (entry
, varlen
) == '='
1329 /* NT environment variables are case insensitive. */
1330 && ! strnicmp (SDATA (entry
), var
, varlen
)
1331 #else /* not WINDOWSNT */
1332 && ! bcmp (SDATA (entry
), var
, varlen
)
1333 #endif /* not WINDOWSNT */
1336 *value
= (char *) SDATA (entry
) + (varlen
+ 1);
1337 *valuelen
= SBYTES (entry
) - (varlen
+ 1);
1345 DEFUN ("getenv-internal", Fgetenv_internal
, Sgetenv_internal
, 1, 1, 0,
1346 doc
: /* Return the value of environment variable VAR, as a string.
1347 VAR should be a string. Value is nil if VAR is undefined in the environment.
1348 This function consults the variable ``process-environment'' for its value. */)
1356 if (getenv_internal (SDATA (var
), SBYTES (var
),
1358 return make_string (value
, valuelen
);
1363 /* A version of getenv that consults process_environment, easily
1372 if (getenv_internal (var
, strlen (var
), &value
, &valuelen
))
1378 #endif /* not VMS */
1380 /* This is run before init_cmdargs. */
1385 char *data_dir
= egetenv ("EMACSDATA");
1386 char *doc_dir
= egetenv ("EMACSDOC");
1389 = Ffile_name_as_directory (build_string (data_dir
? data_dir
1392 = Ffile_name_as_directory (build_string (doc_dir
? doc_dir
1395 /* Check the EMACSPATH environment variable, defaulting to the
1396 PATH_EXEC path from epaths.h. */
1397 Vexec_path
= decode_env_path ("EMACSPATH", PATH_EXEC
);
1398 Vexec_directory
= Ffile_name_as_directory (Fcar (Vexec_path
));
1399 Vexec_path
= nconc2 (decode_env_path ("PATH", ""), Vexec_path
);
1402 /* This is run after init_cmdargs, when Vinstallation_directory is valid. */
1407 char *data_dir
= egetenv ("EMACSDATA");
1410 Lisp_Object tempdir
;
1412 if (!NILP (Vinstallation_directory
))
1414 /* Add to the path the lib-src subdir of the installation dir. */
1416 tem
= Fexpand_file_name (build_string ("lib-src"),
1417 Vinstallation_directory
);
1419 /* MSDOS uses wrapped binaries, so don't do this. */
1420 if (NILP (Fmember (tem
, Vexec_path
)))
1422 Vexec_path
= decode_env_path ("EMACSPATH", PATH_EXEC
);
1423 Vexec_path
= Fcons (tem
, Vexec_path
);
1424 Vexec_path
= nconc2 (decode_env_path ("PATH", ""), Vexec_path
);
1427 Vexec_directory
= Ffile_name_as_directory (tem
);
1428 #endif /* not DOS_NT */
1430 /* Maybe use ../etc as well as ../lib-src. */
1433 tem
= Fexpand_file_name (build_string ("etc"),
1434 Vinstallation_directory
);
1435 Vdoc_directory
= Ffile_name_as_directory (tem
);
1439 /* Look for the files that should be in etc. We don't use
1440 Vinstallation_directory, because these files are never installed
1441 near the executable, and they are never in the build
1442 directory when that's different from the source directory.
1444 Instead, if these files are not in the nominal place, we try the
1445 source directory. */
1448 Lisp_Object tem
, tem1
, srcdir
;
1450 srcdir
= Fexpand_file_name (build_string ("../src/"),
1451 build_string (PATH_DUMPLOADSEARCH
));
1452 tem
= Fexpand_file_name (build_string ("GNU"), Vdata_directory
);
1453 tem1
= Ffile_exists_p (tem
);
1454 if (!NILP (Fequal (srcdir
, Vinvocation_directory
)) || NILP (tem1
))
1457 newdir
= Fexpand_file_name (build_string ("../etc/"),
1458 build_string (PATH_DUMPLOADSEARCH
));
1459 tem
= Fexpand_file_name (build_string ("GNU"), newdir
);
1460 tem1
= Ffile_exists_p (tem
);
1462 Vdata_directory
= newdir
;
1470 tempdir
= Fdirectory_file_name (Vexec_directory
);
1471 if (access (SDATA (tempdir
), 0) < 0)
1472 dir_warning ("Warning: arch-dependent data dir (%s) does not exist.\n",
1476 tempdir
= Fdirectory_file_name (Vdata_directory
);
1477 if (access (SDATA (tempdir
), 0) < 0)
1478 dir_warning ("Warning: arch-independent data dir (%s) does not exist.\n",
1482 Vshell_file_name
= build_string ("*dcl*");
1484 sh
= (char *) getenv ("SHELL");
1485 Vshell_file_name
= build_string (sh
? sh
: "/bin/sh");
1489 Vtemp_file_name_pattern
= build_string ("tmp:emacsXXXXXX.");
1491 if (getenv ("TMPDIR"))
1493 char *dir
= getenv ("TMPDIR");
1494 Vtemp_file_name_pattern
1495 = Fexpand_file_name (build_string ("emacsXXXXXX"),
1496 build_string (dir
));
1499 Vtemp_file_name_pattern
= build_string ("/tmp/emacsXXXXXX");
1503 Vshared_game_score_directory
= Qnil
;
1505 Vshared_game_score_directory
= build_string (PATH_GAME
);
1506 if (NILP (Ffile_directory_p (Vshared_game_score_directory
)))
1507 Vshared_game_score_directory
= Qnil
;
1512 set_process_environment ()
1514 register char **envp
;
1516 Vprocess_environment
= Qnil
;
1520 for (envp
= environ
; *envp
; envp
++)
1521 Vprocess_environment
= Fcons (build_string (*envp
),
1522 Vprocess_environment
);
1529 Qbuffer_file_type
= intern ("buffer-file-type");
1530 staticpro (&Qbuffer_file_type
);
1533 DEFVAR_LISP ("shell-file-name", &Vshell_file_name
,
1534 doc
: /* *File name to load inferior shells from.
1535 Initialized from the SHELL environment variable. */);
1537 DEFVAR_LISP ("exec-path", &Vexec_path
,
1538 doc
: /* *List of directories to search programs to run in subprocesses.
1539 Each element is a string (directory name) or nil (try default directory). */);
1541 DEFVAR_LISP ("exec-suffixes", &Vexec_suffixes
,
1542 doc
: /* *List of suffixes to try to find executable file names.
1543 Each element is a string. */);
1544 Vexec_suffixes
= Qnil
;
1546 DEFVAR_LISP ("exec-directory", &Vexec_directory
,
1547 doc
: /* Directory for executables for Emacs to invoke.
1548 More generally, this includes any architecture-dependent files
1549 that are built and installed from the Emacs distribution. */);
1551 DEFVAR_LISP ("data-directory", &Vdata_directory
,
1552 doc
: /* Directory of machine-independent files that come with GNU Emacs.
1553 These are files intended for Emacs to use while it runs. */);
1555 DEFVAR_LISP ("doc-directory", &Vdoc_directory
,
1556 doc
: /* Directory containing the DOC file that comes with GNU Emacs.
1557 This is usually the same as data-directory. */);
1559 DEFVAR_LISP ("configure-info-directory", &Vconfigure_info_directory
,
1560 doc
: /* For internal use by the build procedure only.
1561 This is the name of the directory in which the build procedure installed
1562 Emacs's info files; the default value for Info-default-directory-list
1564 Vconfigure_info_directory
= build_string (PATH_INFO
);
1566 DEFVAR_LISP ("shared-game-score-directory", &Vshared_game_score_directory
,
1567 doc
: /* Directory of score files for games which come with GNU Emacs.
1568 If this variable is nil, then Emacs is unable to use a shared directory. */);
1570 Vshared_game_score_directory
= Qnil
;
1572 Vshared_game_score_directory
= build_string (PATH_GAME
);
1575 DEFVAR_LISP ("temp-file-name-pattern", &Vtemp_file_name_pattern
,
1576 doc
: /* Pattern for making names for temporary files.
1577 This is used by `call-process-region'. */);
1578 /* This variable is initialized in init_callproc. */
1580 DEFVAR_LISP ("process-environment", &Vprocess_environment
,
1581 doc
: /* List of environment variables for subprocesses to inherit.
1582 Each element should be a string of the form ENVVARNAME=VALUE.
1583 If multiple entries define the same variable, the first one always
1585 The environment which Emacs inherits is placed in this variable
1587 Non-ASCII characters are encoded according to the initial value of
1588 `locale-coding-system', i.e. the elements must normally be decoded for use.
1589 See `setenv' and `getenv'. */);
1592 defsubr (&Scall_process
);
1593 defsubr (&Sgetenv_internal
);
1595 defsubr (&Scall_process_region
);
1598 /* arch-tag: 769b8045-1df7-4d2b-8968-e3fb49017f95
1599 (do not change this comment) */