1 /* Synchronous subprocess invocation for GNU Emacs.
2 Copyright (C) 1985,86,87,88,93,94,95,99, 2000, 2001
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 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"
92 extern noshare
char **environ
;
95 extern char **environ
;
100 #if !defined (USG) || defined (BSD_PGRPS)
102 #define setpgrp setpgid
106 Lisp_Object Vexec_path
, Vexec_directory
, Vexec_suffixes
;
107 Lisp_Object Vdata_directory
, Vdoc_directory
;
108 Lisp_Object Vconfigure_info_directory
, Vshared_game_score_directory
;
109 Lisp_Object Vtemp_file_name_pattern
;
111 Lisp_Object Vshell_file_name
;
113 Lisp_Object Vprocess_environment
;
116 Lisp_Object Qbuffer_file_type
;
119 /* True iff we are about to fork off a synchronous process or if we
120 are waiting for it. */
121 int synch_process_alive
;
123 /* Nonzero => this is a string explaining death of synchronous subprocess. */
124 char *synch_process_death
;
126 /* If synch_process_death is zero,
127 this is exit code of synchronous subprocess. */
128 int synch_process_retcode
;
130 extern Lisp_Object Vdoc_file_name
;
132 extern Lisp_Object Vfile_name_coding_system
, Vdefault_file_name_coding_system
;
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
, display
, path
;
223 int count
= SPECPDL_INDEX ();
225 register const unsigned char **new_argv
226 = (const unsigned char **) alloca ((max (2, nargs
- 2)) * sizeof (char *));
227 struct buffer
*old
= current_buffer
;
228 /* File to use for stderr in the child.
229 t means use same as standard output. */
230 Lisp_Object error_file
;
231 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
232 char *outf
, *tempfile
;
242 struct coding_system process_coding
; /* coding-system of process output */
243 struct coding_system argument_coding
; /* coding-system of arguments */
244 /* Set to the return value of Ffind_operation_coding_system. */
245 Lisp_Object coding_systems
;
247 /* Qt denotes that Ffind_operation_coding_system is not yet called. */
250 CHECK_STRING (args
[0]);
255 /* Without asynchronous processes we cannot have BUFFER == 0. */
257 && (INTEGERP (CONSP (args
[2]) ? XCAR (args
[2]) : args
[2])))
258 error ("Operating system cannot handle asynchronous subprocesses");
259 #endif /* subprocesses */
261 /* Decide the coding-system for giving arguments. */
263 Lisp_Object val
, *args2
;
266 /* If arguments are supplied, we may have to encode them. */
271 for (i
= 4; i
< nargs
; i
++)
272 CHECK_STRING (args
[i
]);
274 for (i
= 4; i
< nargs
; i
++)
275 if (STRING_MULTIBYTE (args
[i
]))
278 if (!NILP (Vcoding_system_for_write
))
279 val
= Vcoding_system_for_write
;
280 else if (! must_encode
)
284 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
285 args2
[0] = Qcall_process
;
286 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
287 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
288 if (CONSP (coding_systems
))
289 val
= XCDR (coding_systems
);
290 else if (CONSP (Vdefault_process_coding_system
))
291 val
= XCDR (Vdefault_process_coding_system
);
295 setup_coding_system (Fcheck_coding_system (val
), &argument_coding
);
299 if (nargs
>= 2 && ! NILP (args
[1]))
301 infile
= Fexpand_file_name (args
[1], current_buffer
->directory
);
302 CHECK_STRING (infile
);
305 infile
= build_string (NULL_DEVICE
);
311 /* If BUFFER is a list, its meaning is
312 (BUFFER-FOR-STDOUT FILE-FOR-STDERR). */
315 if (CONSP (XCDR (buffer
)))
317 Lisp_Object stderr_file
;
318 stderr_file
= XCAR (XCDR (buffer
));
320 if (NILP (stderr_file
) || EQ (Qt
, stderr_file
))
321 error_file
= stderr_file
;
323 error_file
= Fexpand_file_name (stderr_file
, Qnil
);
326 buffer
= XCAR (buffer
);
329 if (!(EQ (buffer
, Qnil
)
331 || INTEGERP (buffer
)))
333 Lisp_Object spec_buffer
;
334 spec_buffer
= buffer
;
335 buffer
= Fget_buffer_create (buffer
);
336 /* Mention the buffer name for a better error message. */
338 CHECK_BUFFER (spec_buffer
);
339 CHECK_BUFFER (buffer
);
345 /* Make sure that the child will be able to chdir to the current
346 buffer's current directory, or its unhandled equivalent. We
347 can't just have the child check for an error when it does the
348 chdir, since it's in a vfork.
350 We have to GCPRO around this because Fexpand_file_name,
351 Funhandled_file_name_directory, and Ffile_accessible_directory_p
352 might call a file name handling function. The argument list is
353 protected by the caller, so all we really have to worry about is
356 struct gcpro gcpro1
, gcpro2
, gcpro3
;
358 current_dir
= current_buffer
->directory
;
360 GCPRO3 (infile
, buffer
, current_dir
);
363 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
365 if (NILP (Ffile_accessible_directory_p (current_dir
)))
366 report_file_error ("Setting current directory",
367 Fcons (current_buffer
->directory
, Qnil
));
372 display
= nargs
>= 4 ? args
[3] : Qnil
;
374 filefd
= emacs_open (SDATA (infile
), O_RDONLY
, 0);
377 report_file_error ("Opening process input file", Fcons (infile
, Qnil
));
379 /* Search for program; barf if not found. */
383 GCPRO1 (current_dir
);
384 openp (Vexec_path
, args
[0], Vexec_suffixes
, &path
, make_number (X_OK
));
389 emacs_close (filefd
);
390 report_file_error ("Searching for program", Fcons (args
[0], Qnil
));
393 /* If program file name starts with /: for quoting a magic name,
395 if (SBYTES (path
) > 2 && SREF (path
, 0) == '/'
396 && SREF (path
, 1) == ':')
397 path
= Fsubstring (path
, make_number (2), Qnil
);
399 new_argv
[0] = SDATA (path
);
403 struct gcpro gcpro1
, gcpro2
, gcpro3
;
405 GCPRO3 (infile
, buffer
, current_dir
);
406 argument_coding
.dst_multibyte
= 0;
407 for (i
= 4; i
< nargs
; i
++)
409 argument_coding
.src_multibyte
= STRING_MULTIBYTE (args
[i
]);
410 if (CODING_REQUIRE_ENCODING (&argument_coding
))
411 /* We must encode this argument. */
412 args
[i
] = encode_coding_string (&argument_coding
, args
[i
], 1);
413 new_argv
[i
- 3] = SDATA (args
[i
]);
416 new_argv
[nargs
- 3] = 0;
421 #ifdef MSDOS /* MW, July 1993 */
422 if ((outf
= egetenv ("TMPDIR")))
423 strcpy (tempfile
= alloca (strlen (outf
) + 20), outf
);
426 tempfile
= alloca (20);
429 dostounix_filename (tempfile
);
430 if (*tempfile
== '\0' || tempfile
[strlen (tempfile
) - 1] != '/')
431 strcat (tempfile
, "/");
432 strcat (tempfile
, "detmp.XXX");
435 outfilefd
= creat (tempfile
, S_IREAD
| S_IWRITE
);
438 emacs_close (filefd
);
439 report_file_error ("Opening process output file",
440 Fcons (build_string (tempfile
), Qnil
));
447 /* Since we don't have pipes on the Mac, create a temporary file to
448 hold the output of the subprocess. */
449 tempfile
= (char *) alloca (SBYTES (Vtemp_file_name_pattern
) + 1);
450 bcopy (SDATA (Vtemp_file_name_pattern
), tempfile
,
451 SBYTES (Vtemp_file_name_pattern
) + 1);
455 outfilefd
= creat (tempfile
, S_IREAD
| S_IWRITE
);
459 report_file_error ("Opening process output file",
460 Fcons (build_string (tempfile
), Qnil
));
466 if (INTEGERP (buffer
))
467 fd
[1] = emacs_open (NULL_DEVICE
, O_WRONLY
, 0), fd
[0] = -1;
475 emacs_close (filefd
);
476 report_file_error ("Creating process pipe", Qnil
);
481 /* Replaced by close_process_descs */
482 set_exclusive_use (fd
[0]);
487 /* child_setup must clobber environ in systems with true vfork.
488 Protect it from permanent change. */
489 register char **save_environ
= environ
;
490 register int fd1
= fd
[1];
493 #if 0 /* Some systems don't have sigblock. */
494 mask
= sigblock (sigmask (SIGCHLD
));
497 /* Record that we're about to create a synchronous process. */
498 synch_process_alive
= 1;
500 /* These vars record information from process termination.
501 Clear them now before process can possibly terminate,
502 to avoid timing error if process terminates soon. */
503 synch_process_death
= 0;
504 synch_process_retcode
= 0;
506 if (NILP (error_file
))
507 fd_error
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
508 else if (STRINGP (error_file
))
511 fd_error
= emacs_open (SDATA (error_file
),
512 O_WRONLY
| O_TRUNC
| O_CREAT
| O_TEXT
,
514 #else /* not DOS_NT */
515 fd_error
= creat (SDATA (error_file
), 0666);
516 #endif /* not DOS_NT */
521 emacs_close (filefd
);
529 report_file_error ("Cannot redirect stderr",
530 Fcons ((NILP (error_file
)
531 ? build_string (NULL_DEVICE
) : error_file
),
535 current_dir
= ENCODE_FILE (current_dir
);
539 /* Call run_mac_command in sysdep.c here directly instead of doing
540 a child_setup as for MSDOS and other platforms. Note that this
541 code does not handle passing the environment to the synchronous
543 char *infn
, *outfn
, *errfn
, *currdn
;
545 /* close these files so subprocess can write to them */
547 if (fd_error
!= outfilefd
)
549 fd1
= -1; /* No harm in closing that one! */
551 infn
= SDATA (infile
);
553 if (NILP (error_file
))
555 else if (EQ (Qt
, error_file
))
558 errfn
= SDATA (error_file
);
559 currdn
= SDATA (current_dir
);
560 pid
= run_mac_command (new_argv
, currdn
, infn
, outfn
, errfn
);
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 /* Since CRLF is converted to LF within `decode_coding', we can
573 always open a file with binary mode. */
574 fd
[0] = open (tempfile
, O_BINARY
);
579 report_file_error ("Cannot re-open temporary file", Qnil
);
582 #else /* not MAC_OS8 */
583 #ifdef MSDOS /* MW, July 1993 */
584 /* Note that on MSDOS `child_setup' actually returns the child process
585 exit status, not its PID, so we assign it to `synch_process_retcode'
587 pid
= child_setup (filefd
, outfilefd
, fd_error
, (char **) new_argv
,
590 /* Record that the synchronous process exited and note its
591 termination status. */
592 synch_process_alive
= 0;
593 synch_process_retcode
= pid
;
594 if (synch_process_retcode
< 0) /* means it couldn't be exec'ed */
596 synchronize_system_messages_locale ();
597 synch_process_death
= strerror (errno
);
600 emacs_close (outfilefd
);
601 if (fd_error
!= outfilefd
)
602 emacs_close (fd_error
);
603 fd1
= -1; /* No harm in closing that one! */
604 /* Since CRLF is converted to LF within `decode_coding', we can
605 always open a file with binary mode. */
606 fd
[0] = emacs_open (tempfile
, O_RDONLY
| O_BINARY
, 0);
610 emacs_close (filefd
);
611 report_file_error ("Cannot re-open temporary file", Qnil
);
613 #else /* not MSDOS */
615 pid
= child_setup (filefd
, fd1
, fd_error
, (char **) new_argv
,
617 #else /* not WINDOWSNT */
627 #if defined (USG) && !defined (BSD_PGRPS)
632 child_setup (filefd
, fd1
, fd_error
, (char **) new_argv
,
635 #endif /* not WINDOWSNT */
637 /* The MSDOS case did this already. */
639 emacs_close (fd_error
);
640 #endif /* not MSDOS */
641 #endif /* not MAC_OS8 */
643 environ
= save_environ
;
645 /* Close most of our fd's, but not fd[0]
646 since we will use that to read input from. */
647 emacs_close (filefd
);
648 if (fd1
>= 0 && fd1
!= fd_error
)
656 report_file_error ("Doing vfork", Qnil
);
659 if (INTEGERP (buffer
))
664 /* If Emacs has been built with asynchronous subprocess support,
665 we don't need to do this, I think because it will then have
666 the facilities for handling SIGCHLD. */
667 wait_without_blocking ();
668 #endif /* subprocesses */
672 /* Enable sending signal if user quits below. */
673 call_process_exited
= 0;
675 #if defined(MSDOS) || defined(MAC_OS8)
676 /* MSDOS needs different cleanup information. */
677 record_unwind_protect (call_process_cleanup
,
678 Fcons (make_number (fd
[0]), build_string (tempfile
)));
680 record_unwind_protect (call_process_cleanup
,
681 Fcons (make_number (fd
[0]), make_number (pid
)));
682 #endif /* not MSDOS and not MAC_OS8 */
685 if (BUFFERP (buffer
))
686 Fset_buffer (buffer
);
690 /* If BUFFER is nil, we must read process output once and then
691 discard it, so setup coding system but with nil. */
692 setup_coding_system (Qnil
, &process_coding
);
696 Lisp_Object val
, *args2
;
699 if (!NILP (Vcoding_system_for_read
))
700 val
= Vcoding_system_for_read
;
703 if (EQ (coding_systems
, Qt
))
707 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
708 args2
[0] = Qcall_process
;
709 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
711 = Ffind_operation_coding_system (nargs
+ 1, args2
);
713 if (CONSP (coding_systems
))
714 val
= XCAR (coding_systems
);
715 else if (CONSP (Vdefault_process_coding_system
))
716 val
= XCAR (Vdefault_process_coding_system
);
720 Fcheck_coding_system (val
);
721 /* In unibyte mode, character code conversion should not take
722 place but EOL conversion should. So, setup raw-text or one
723 of the subsidiary according to the information just setup. */
724 if (NILP (current_buffer
->enable_multibyte_characters
)
726 val
= raw_text_coding_system (val
);
727 setup_coding_system (val
, &process_coding
);
738 int display_on_the_fly
= !NILP (display
) && INTERACTIVE
;
739 struct coding_system saved_coding
;
741 saved_coding
= process_coding
;
744 /* Repeatedly read until we've filled as much as possible
745 of the buffer size we have. But don't read
746 less than 1024--save that for the next bufferful. */
748 while (nread
< bufsize
- 1024)
750 int this_read
= emacs_read (fd
[0], bufptr
+ nread
,
758 process_coding
.mode
|= CODING_MODE_LAST_BLOCK
;
763 total_read
+= this_read
;
765 if (display_on_the_fly
)
769 /* Now NREAD is the total amount of data in the buffer. */
774 if (NILP (current_buffer
->enable_multibyte_characters
)
775 && ! CODING_MAY_REQUIRE_DECODING (&process_coding
))
776 insert_1_both (bufptr
, nread
, nread
, 0, 1, 0);
778 { /* We have to decode the input. */
781 XSETBUFFER (buf
, current_buffer
);
782 decode_coding_c_string (&process_coding
, bufptr
, nread
,
784 if (display_on_the_fly
785 && CODING_REQUIRE_DETECTION (&saved_coding
)
786 && ! CODING_REQUIRE_DETECTION (&process_coding
))
788 /* We have detected some coding system. But,
789 there's a possibility that the detection was
790 done by insufficient data. So, we give up
791 displaying on the fly. */
792 if (process_coding
.produced
> 0)
793 del_range_2 (process_coding
.dst_pos
,
794 process_coding
.dst_pos_byte
,
795 process_coding
.dst_pos
796 + process_coding
.produced_char
,
797 process_coding
.dst_pos_byte
798 + process_coding
.produced
, 0);
799 display_on_the_fly
= 0;
800 process_coding
= saved_coding
;
805 TEMP_SET_PT_BOTH (PT
+ process_coding
.produced_char
,
806 PT_BYTE
+ process_coding
.produced
);
807 carryover
= process_coding
.carryover_bytes
;
809 /* As CARRYOVER should not be that large, we had
810 better avoid overhead of bcopy. */
811 BCOPY_SHORT (process_coding
.carryover
, bufptr
,
812 process_coding
.carryover_bytes
);
816 if (process_coding
.mode
& CODING_MODE_LAST_BLOCK
)
819 /* Make the buffer bigger as we continue to read more data,
821 if (bufsize
< 64 * 1024 && total_read
> 32 * bufsize
)
826 tempptr
= (char *) alloca (bufsize
);
827 bcopy (bufptr
, tempptr
, bufsize
/ 2);
831 if (!NILP (display
) && INTERACTIVE
)
834 prepare_menu_bars ();
836 redisplay_preserve_echo_area (1);
843 Vlast_coding_system_used
= CODING_ID_NAME (process_coding
.id
);
844 /* If the caller required, let the buffer inherit the
845 coding-system used to decode the process output. */
846 if (inherit_process_coding_system
)
847 call1 (intern ("after-insert-file-set-buffer-file-coding-system"),
848 make_number (total_read
));
851 /* Wait for it to terminate, unless it already has. */
852 wait_for_termination (pid
);
856 set_buffer_internal (old
);
858 /* Don't kill any children that the subprocess may have left behind
860 call_process_exited
= 1;
862 unbind_to (count
, Qnil
);
864 if (synch_process_death
)
865 return code_convert_string_norecord (build_string (synch_process_death
),
866 Vlocale_coding_system
, 0);
867 return make_number (synch_process_retcode
);
872 delete_temp_file (name
)
875 /* Use Fdelete_file (indirectly) because that runs a file name handler.
876 We did that when writing the file, so we should do so when deleting. */
877 internal_delete_file (name
);
881 DEFUN ("call-process-region", Fcall_process_region
, Scall_process_region
,
883 doc
: /* Send text from START to END to a synchronous process running PROGRAM.
884 The remaining arguments are optional.
885 Delete the text if fourth arg DELETE is non-nil.
887 Insert output in BUFFER before point; t means current buffer;
888 nil for BUFFER means discard it; 0 means discard and don't wait.
889 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
890 REAL-BUFFER says what to do with standard output, as above,
891 while STDERR-FILE says what to do with standard error in the child.
892 STDERR-FILE may be nil (discard standard error output),
893 t (mix it with ordinary output), or a file name string.
895 Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.
896 Remaining args are passed to PROGRAM at startup as command args.
898 If BUFFER is 0, `call-process-region' returns immediately with value nil.
899 Otherwise it waits for PROGRAM to terminate
900 and returns a numeric exit status or a signal description string.
901 If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
903 usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */)
906 register Lisp_Object
*args
;
909 Lisp_Object filename_string
;
910 register Lisp_Object start
, end
;
911 int count
= SPECPDL_INDEX ();
912 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
913 Lisp_Object coding_systems
;
914 Lisp_Object val
, *args2
;
920 if ((outf
= egetenv ("TMPDIR"))
921 || (outf
= egetenv ("TMP"))
922 || (outf
= egetenv ("TEMP")))
923 strcpy (tempfile
= alloca (strlen (outf
) + 20), outf
);
926 tempfile
= alloca (20);
929 if (!IS_DIRECTORY_SEP (tempfile
[strlen (tempfile
) - 1]))
930 strcat (tempfile
, "/");
931 if ('/' == DIRECTORY_SEP
)
932 dostounix_filename (tempfile
);
934 unixtodos_filename (tempfile
);
936 strcat (tempfile
, "emXXXXXX");
938 strcat (tempfile
, "detmp.XXX");
940 #else /* not DOS_NT */
941 char *tempfile
= (char *) alloca (SBYTES (Vtemp_file_name_pattern
) + 1);
942 bcopy (SDATA (Vtemp_file_name_pattern
), tempfile
,
943 SBYTES (Vtemp_file_name_pattern
) + 1);
944 #endif /* not DOS_NT */
950 int fd
= mkstemp (tempfile
);
952 report_file_error ("Failed to open temporary file",
953 Fcons (Vtemp_file_name_pattern
, Qnil
));
961 filename_string
= build_string (tempfile
);
962 GCPRO1 (filename_string
);
965 /* Decide coding-system of the contents of the temporary file. */
966 if (!NILP (Vcoding_system_for_write
))
967 val
= Vcoding_system_for_write
;
968 else if (NILP (current_buffer
->enable_multibyte_characters
))
972 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
973 args2
[0] = Qcall_process_region
;
974 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
975 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
976 if (CONSP (coding_systems
))
977 val
= XCDR (coding_systems
);
978 else if (CONSP (Vdefault_process_coding_system
))
979 val
= XCDR (Vdefault_process_coding_system
);
985 int count1
= SPECPDL_INDEX ();
987 specbind (intern ("coding-system-for-write"), val
);
988 Fwrite_region (start
, end
, filename_string
, Qnil
, Qlambda
, Qnil
, Qnil
);
990 unbind_to (count1
, Qnil
);
993 /* Note that Fcall_process takes care of binding
994 coding-system-for-read. */
996 record_unwind_protect (delete_temp_file
, filename_string
);
998 if (nargs
> 3 && !NILP (args
[3]))
999 Fdelete_region (start
, end
);
1011 args
[1] = filename_string
;
1013 RETURN_UNGCPRO (unbind_to (count
, Fcall_process (nargs
, args
)));
1016 #ifndef VMS /* VMS version is in vmsproc.c. */
1018 static int relocate_fd ();
1020 /* This is the last thing run in a newly forked inferior
1021 either synchronous or asynchronous.
1022 Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2.
1023 Initialize inferior's priority, pgrp, connected dir and environment.
1024 then exec another program based on new_argv.
1026 This function may change environ for the superior process.
1027 Therefore, the superior process must save and restore the value
1028 of environ around the vfork and the call to this function.
1030 SET_PGRP is nonzero if we should put the subprocess into a separate
1033 CURRENT_DIR is an elisp string giving the path of the current
1034 directory the subprocess should have. Since we can't really signal
1035 a decent error from within the child, this should be verified as an
1036 executable directory by the parent. */
1039 child_setup (in
, out
, err
, new_argv
, set_pgrp
, current_dir
)
1041 register char **new_argv
;
1043 Lisp_Object current_dir
;
1050 #endif /* WINDOWSNT */
1052 int pid
= getpid ();
1054 #ifdef SET_EMACS_PRIORITY
1056 extern EMACS_INT emacs_priority
;
1058 if (emacs_priority
< 0)
1059 nice (- emacs_priority
);
1064 /* Close Emacs's descriptors that this process should not have. */
1065 close_process_descs ();
1067 /* DOS_NT isn't in a vfork, so if we are in the middle of load-file,
1068 we will lose if we call close_load_descs here. */
1070 close_load_descs ();
1073 /* Note that use of alloca is always safe here. It's obvious for systems
1074 that do not have true vfork or that have true (stack) alloca.
1075 If using vfork and C_ALLOCA it is safe because that changes
1076 the superior's static variables as if the superior had done alloca
1077 and will be cleaned up in the usual way. */
1079 register char *temp
;
1082 i
= SBYTES (current_dir
);
1084 /* MSDOS must have all environment variables malloc'ed, because
1085 low-level libc functions that launch subsidiary processes rely
1087 pwd_var
= (char *) xmalloc (i
+ 6);
1089 pwd_var
= (char *) alloca (i
+ 6);
1092 bcopy ("PWD=", pwd_var
, 4);
1093 bcopy (SDATA (current_dir
), temp
, i
);
1094 if (!IS_DIRECTORY_SEP (temp
[i
- 1])) temp
[i
++] = DIRECTORY_SEP
;
1098 /* We can't signal an Elisp error here; we're in a vfork. Since
1099 the callers check the current directory before forking, this
1100 should only return an error if the directory's permissions
1101 are changed between the check and this chdir, but we should
1103 if (chdir (temp
) < 0)
1108 /* Get past the drive letter, so that d:/ is left alone. */
1109 if (i
> 2 && IS_DEVICE_SEP (temp
[1]) && IS_DIRECTORY_SEP (temp
[2]))
1116 /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */
1117 while (i
> 2 && IS_DIRECTORY_SEP (temp
[i
- 1]))
1121 /* Set `env' to a vector of the strings in Vprocess_environment. */
1123 register Lisp_Object tem
;
1124 register char **new_env
;
1125 register int new_length
;
1128 for (tem
= Vprocess_environment
;
1129 CONSP (tem
) && STRINGP (XCAR (tem
));
1133 /* new_length + 2 to include PWD and terminating 0. */
1134 env
= new_env
= (char **) alloca ((new_length
+ 2) * sizeof (char *));
1136 /* If we have a PWD envvar, pass one down,
1137 but with corrected value. */
1139 *new_env
++ = pwd_var
;
1141 /* Copy the Vprocess_environment strings into new_env. */
1142 for (tem
= Vprocess_environment
;
1143 CONSP (tem
) && STRINGP (XCAR (tem
));
1147 char *string
= (char *) SDATA (XCAR (tem
));
1148 /* See if this string duplicates any string already in the env.
1149 If so, don't put it in.
1150 When an env var has multiple definitions,
1151 we keep the definition that comes first in process-environment. */
1152 for (; ep
!= new_env
; ep
++)
1154 char *p
= *ep
, *q
= string
;
1158 /* The string is malformed; might as well drop it. */
1167 *new_env
++ = string
;
1173 prepare_standard_handles (in
, out
, err
, handles
);
1174 set_process_dir (SDATA (current_dir
));
1175 #else /* not WINDOWSNT */
1176 /* Make sure that in, out, and err are not actually already in
1177 descriptors zero, one, or two; this could happen if Emacs is
1178 started with its standard in, out, or error closed, as might
1181 int oin
= in
, oout
= out
;
1183 /* We have to avoid relocating the same descriptor twice! */
1185 in
= relocate_fd (in
, 3);
1190 out
= relocate_fd (out
, 3);
1194 else if (err
== oout
)
1197 err
= relocate_fd (err
, 3);
1211 #endif /* not MSDOS */
1212 #endif /* not WINDOWSNT */
1214 #if defined(USG) && !defined(BSD_PGRPS)
1215 #ifndef SETPGRP_RELEASES_CTTY
1216 setpgrp (); /* No arguments but equivalent in this case */
1221 /* setpgrp_of_tty is incorrect here; it uses input_fd. */
1222 EMACS_SET_TTY_PGRP (0, &pid
);
1225 pid
= run_msdos_command (new_argv
, pwd_var
+ 4, in
, out
, err
, env
);
1228 /* An error occurred while trying to run the subprocess. */
1229 report_file_error ("Spawning child process", Qnil
);
1231 #else /* not MSDOS */
1233 /* Spawn the child. (See ntproc.c:Spawnve). */
1234 cpid
= spawnve (_P_NOWAIT
, new_argv
[0], new_argv
, env
);
1235 reset_standard_handles (in
, out
, err
, handles
);
1237 /* An error occurred while trying to spawn the process. */
1238 report_file_error ("Spawning child process", Qnil
);
1240 #else /* not WINDOWSNT */
1241 /* execvp does not accept an environment arg so the only way
1242 to pass this environment is to set environ. Our caller
1243 is responsible for restoring the ambient value of environ. */
1245 execvp (new_argv
[0], new_argv
);
1247 emacs_write (1, "Can't exec program: ", 20);
1248 emacs_write (1, new_argv
[0], strlen (new_argv
[0]));
1249 emacs_write (1, "\n", 1);
1251 #endif /* not WINDOWSNT */
1252 #endif /* not MSDOS */
1255 /* Move the file descriptor FD so that its number is not less than MINFD.
1256 If the file descriptor is moved at all, the original is freed. */
1258 relocate_fd (fd
, minfd
)
1268 char *message1
= "Error while setting up child: ";
1269 char *errmessage
= strerror (errno
);
1270 char *message2
= "\n";
1271 emacs_write (2, message1
, strlen (message1
));
1272 emacs_write (2, errmessage
, strlen (errmessage
));
1273 emacs_write (2, message2
, strlen (message2
));
1276 /* Note that we hold the original FD open while we recurse,
1277 to guarantee we'll get a new FD if we need it. */
1278 new = relocate_fd (new, minfd
);
1285 getenv_internal (var
, varlen
, value
, valuelen
)
1293 for (scan
= Vprocess_environment
; CONSP (scan
); scan
= XCDR (scan
))
1297 entry
= XCAR (scan
);
1299 && SBYTES (entry
) > varlen
1300 && SREF (entry
, varlen
) == '='
1302 /* NT environment variables are case insensitive. */
1303 && ! strnicmp (SDATA (entry
), var
, varlen
)
1304 #else /* not WINDOWSNT */
1305 && ! bcmp (SDATA (entry
), var
, varlen
)
1306 #endif /* not WINDOWSNT */
1309 *value
= (char *) SDATA (entry
) + (varlen
+ 1);
1310 *valuelen
= SBYTES (entry
) - (varlen
+ 1);
1318 DEFUN ("getenv-internal", Fgetenv_internal
, Sgetenv_internal
, 1, 1, 0,
1319 doc
: /* Return the value of environment variable VAR, as a string.
1320 VAR should be a string. Value is nil if VAR is undefined in the environment.
1321 This function consults the variable ``process-environment'' for its value. */)
1329 if (getenv_internal (SDATA (var
), SBYTES (var
),
1331 return make_string (value
, valuelen
);
1336 /* A version of getenv that consults process_environment, easily
1345 if (getenv_internal (var
, strlen (var
), &value
, &valuelen
))
1351 #endif /* not VMS */
1353 /* This is run before init_cmdargs. */
1358 char *data_dir
= egetenv ("EMACSDATA");
1359 char *doc_dir
= egetenv ("EMACSDOC");
1362 = Ffile_name_as_directory (build_string (data_dir
? data_dir
1365 = Ffile_name_as_directory (build_string (doc_dir
? doc_dir
1368 /* Check the EMACSPATH environment variable, defaulting to the
1369 PATH_EXEC path from epaths.h. */
1370 Vexec_path
= decode_env_path ("EMACSPATH", PATH_EXEC
);
1371 Vexec_directory
= Ffile_name_as_directory (Fcar (Vexec_path
));
1372 Vexec_path
= nconc2 (decode_env_path ("PATH", ""), Vexec_path
);
1375 /* This is run after init_cmdargs, when Vinstallation_directory is valid. */
1380 char *data_dir
= egetenv ("EMACSDATA");
1383 Lisp_Object tempdir
;
1385 if (!NILP (Vinstallation_directory
))
1387 /* Add to the path the lib-src subdir of the installation dir. */
1389 tem
= Fexpand_file_name (build_string ("lib-src"),
1390 Vinstallation_directory
);
1392 /* MSDOS uses wrapped binaries, so don't do this. */
1393 if (NILP (Fmember (tem
, Vexec_path
)))
1395 Vexec_path
= decode_env_path ("EMACSPATH", PATH_EXEC
);
1396 Vexec_path
= Fcons (tem
, Vexec_path
);
1397 Vexec_path
= nconc2 (decode_env_path ("PATH", ""), Vexec_path
);
1400 Vexec_directory
= Ffile_name_as_directory (tem
);
1401 #endif /* not DOS_NT */
1403 /* Maybe use ../etc as well as ../lib-src. */
1406 tem
= Fexpand_file_name (build_string ("etc"),
1407 Vinstallation_directory
);
1408 Vdoc_directory
= Ffile_name_as_directory (tem
);
1412 /* Look for the files that should be in etc. We don't use
1413 Vinstallation_directory, because these files are never installed
1414 near the executable, and they are never in the build
1415 directory when that's different from the source directory.
1417 Instead, if these files are not in the nominal place, we try the
1418 source directory. */
1421 Lisp_Object tem
, tem1
, srcdir
;
1423 srcdir
= Fexpand_file_name (build_string ("../src/"),
1424 build_string (PATH_DUMPLOADSEARCH
));
1425 tem
= Fexpand_file_name (build_string ("GNU"), Vdata_directory
);
1426 tem1
= Ffile_exists_p (tem
);
1427 if (!NILP (Fequal (srcdir
, Vinvocation_directory
)) || NILP (tem1
))
1430 newdir
= Fexpand_file_name (build_string ("../etc/"),
1431 build_string (PATH_DUMPLOADSEARCH
));
1432 tem
= Fexpand_file_name (build_string ("GNU"), newdir
);
1433 tem1
= Ffile_exists_p (tem
);
1435 Vdata_directory
= newdir
;
1443 tempdir
= Fdirectory_file_name (Vexec_directory
);
1444 if (access (SDATA (tempdir
), 0) < 0)
1445 dir_warning ("Warning: arch-dependent data dir (%s) does not exist.\n",
1449 tempdir
= Fdirectory_file_name (Vdata_directory
);
1450 if (access (SDATA (tempdir
), 0) < 0)
1451 dir_warning ("Warning: arch-independent data dir (%s) does not exist.\n",
1455 Vshell_file_name
= build_string ("*dcl*");
1457 sh
= (char *) getenv ("SHELL");
1458 Vshell_file_name
= build_string (sh
? sh
: "/bin/sh");
1462 Vtemp_file_name_pattern
= build_string ("tmp:emacsXXXXXX.");
1464 if (getenv ("TMPDIR"))
1466 char *dir
= getenv ("TMPDIR");
1467 Vtemp_file_name_pattern
1468 = Fexpand_file_name (build_string ("emacsXXXXXX"),
1469 build_string (dir
));
1472 Vtemp_file_name_pattern
= build_string ("/tmp/emacsXXXXXX");
1476 Vshared_game_score_directory
= Qnil
;
1478 Vshared_game_score_directory
= build_string (PATH_GAME
);
1479 if (NILP (Ffile_directory_p (Vshared_game_score_directory
)))
1480 Vshared_game_score_directory
= Qnil
;
1485 set_process_environment ()
1487 register char **envp
;
1489 Vprocess_environment
= Qnil
;
1493 for (envp
= environ
; *envp
; envp
++)
1494 Vprocess_environment
= Fcons (build_string (*envp
),
1495 Vprocess_environment
);
1502 Qbuffer_file_type
= intern ("buffer-file-type");
1503 staticpro (&Qbuffer_file_type
);
1506 DEFVAR_LISP ("shell-file-name", &Vshell_file_name
,
1507 doc
: /* *File name to load inferior shells from.
1508 Initialized from the SHELL environment variable. */);
1510 DEFVAR_LISP ("exec-path", &Vexec_path
,
1511 doc
: /* *List of directories to search programs to run in subprocesses.
1512 Each element is a string (directory name) or nil (try default directory). */);
1514 DEFVAR_LISP ("exec-suffixes", &Vexec_suffixes
,
1515 doc
: /* *List of suffixes to try to find executable file names.
1516 Each element is a string. */);
1517 Vexec_suffixes
= Qnil
;
1519 DEFVAR_LISP ("exec-directory", &Vexec_directory
,
1520 doc
: /* Directory for executables for Emacs to invoke.
1521 More generally, this includes any architecture-dependent files
1522 that are built and installed from the Emacs distribution. */);
1524 DEFVAR_LISP ("data-directory", &Vdata_directory
,
1525 doc
: /* Directory of machine-independent files that come with GNU Emacs.
1526 These are files intended for Emacs to use while it runs. */);
1528 DEFVAR_LISP ("doc-directory", &Vdoc_directory
,
1529 doc
: /* Directory containing the DOC file that comes with GNU Emacs.
1530 This is usually the same as data-directory. */);
1532 DEFVAR_LISP ("configure-info-directory", &Vconfigure_info_directory
,
1533 doc
: /* For internal use by the build procedure only.
1534 This is the name of the directory in which the build procedure installed
1535 Emacs's info files; the default value for Info-default-directory-list
1537 Vconfigure_info_directory
= build_string (PATH_INFO
);
1539 DEFVAR_LISP ("shared-game-score-directory", &Vshared_game_score_directory
,
1540 doc
: /* Directory of score files for games which come with GNU Emacs.
1541 If this variable is nil, then Emacs is unable to use a shared directory. */);
1543 Vshared_game_score_directory
= Qnil
;
1545 Vshared_game_score_directory
= build_string (PATH_GAME
);
1548 DEFVAR_LISP ("temp-file-name-pattern", &Vtemp_file_name_pattern
,
1549 doc
: /* Pattern for making names for temporary files.
1550 This is used by `call-process-region'. */);
1551 /* This variable is initialized in init_callproc. */
1553 DEFVAR_LISP ("process-environment", &Vprocess_environment
,
1554 doc
: /* List of environment variables for subprocesses to inherit.
1555 Each element should be a string of the form ENVVARNAME=VALUE.
1556 If multiple entries define the same variable, the first one always
1558 The environment which Emacs inherits is placed in this variable
1560 Non-ASCII characters are encoded according to the initial value of
1561 `locale-coding-system', i.e. the elements must normally be decoded for use.
1562 See `setenv' and `getenv'. */);
1565 defsubr (&Scall_process
);
1566 defsubr (&Sgetenv_internal
);
1568 defsubr (&Scall_process_region
);