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
;
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 (macintosh)
158 /* for MSDOS fdpid is really (fd . tempfile) */
159 register Lisp_Object file
;
161 emacs_close (XFASTINT (Fcar (fdpid
)));
162 if (strcmp (XSTRING (file
)-> data
, NULL_DEVICE
) != 0)
163 unlink (XSTRING (file
)->data
);
164 #else /* not MSDOS and not macintosh */
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_ptr
- specpdl
;
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_ptr
- specpdl
;
225 register unsigned char **new_argv
226 = (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 (XSTRING (infile
)->data
, 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
, 1);
389 emacs_close (filefd
);
390 report_file_error ("Searching for program", Fcons (args
[0], Qnil
));
392 new_argv
[0] = XSTRING (path
)->data
;
396 struct gcpro gcpro1
, gcpro2
, gcpro3
;
398 GCPRO3 (infile
, buffer
, current_dir
);
399 argument_coding
.dst_multibyte
= 0;
400 for (i
= 4; i
< nargs
; i
++)
402 argument_coding
.src_multibyte
= STRING_MULTIBYTE (args
[i
]);
403 if (CODING_REQUIRE_ENCODING (&argument_coding
))
404 /* We must encode this argument. */
405 args
[i
] = encode_coding_string (&argument_coding
, args
[i
], 1);
406 new_argv
[i
- 3] = XSTRING (args
[i
])->data
;
409 new_argv
[nargs
- 3] = 0;
414 #ifdef MSDOS /* MW, July 1993 */
415 if ((outf
= egetenv ("TMPDIR")))
416 strcpy (tempfile
= alloca (strlen (outf
) + 20), outf
);
419 tempfile
= alloca (20);
422 dostounix_filename (tempfile
);
423 if (*tempfile
== '\0' || tempfile
[strlen (tempfile
) - 1] != '/')
424 strcat (tempfile
, "/");
425 strcat (tempfile
, "detmp.XXX");
428 outfilefd
= creat (tempfile
, S_IREAD
| S_IWRITE
);
431 emacs_close (filefd
);
432 report_file_error ("Opening process output file",
433 Fcons (build_string (tempfile
), Qnil
));
440 /* Since we don't have pipes on the Mac, create a temporary file to
441 hold the output of the subprocess. */
442 tempfile
= (char *) alloca (STRING_BYTES (XSTRING (Vtemp_file_name_pattern
)) + 1);
443 bcopy (XSTRING (Vtemp_file_name_pattern
)->data
, tempfile
,
444 STRING_BYTES (XSTRING (Vtemp_file_name_pattern
)) + 1);
448 outfilefd
= creat (tempfile
, S_IREAD
| S_IWRITE
);
452 report_file_error ("Opening process output file",
453 Fcons (build_string (tempfile
), Qnil
));
457 #endif /* macintosh */
459 if (INTEGERP (buffer
))
460 fd
[1] = emacs_open (NULL_DEVICE
, O_WRONLY
, 0), fd
[0] = -1;
468 emacs_close (filefd
);
469 report_file_error ("Creating process pipe", Qnil
);
474 /* Replaced by close_process_descs */
475 set_exclusive_use (fd
[0]);
480 /* child_setup must clobber environ in systems with true vfork.
481 Protect it from permanent change. */
482 register char **save_environ
= environ
;
483 register int fd1
= fd
[1];
486 #if 0 /* Some systems don't have sigblock. */
487 mask
= sigblock (sigmask (SIGCHLD
));
490 /* Record that we're about to create a synchronous process. */
491 synch_process_alive
= 1;
493 /* These vars record information from process termination.
494 Clear them now before process can possibly terminate,
495 to avoid timing error if process terminates soon. */
496 synch_process_death
= 0;
497 synch_process_retcode
= 0;
499 if (NILP (error_file
))
500 fd_error
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
501 else if (STRINGP (error_file
))
504 fd_error
= emacs_open (XSTRING (error_file
)->data
,
505 O_WRONLY
| O_TRUNC
| O_CREAT
| O_TEXT
,
507 #else /* not DOS_NT */
508 fd_error
= creat (XSTRING (error_file
)->data
, 0666);
509 #endif /* not DOS_NT */
514 emacs_close (filefd
);
522 report_file_error ("Cannot redirect stderr",
523 Fcons ((NILP (error_file
)
524 ? build_string (NULL_DEVICE
) : error_file
),
528 current_dir
= ENCODE_FILE (current_dir
);
532 /* Call run_mac_command in sysdep.c here directly instead of doing
533 a child_setup as for MSDOS and other platforms. Note that this
534 code does not handle passing the environment to the synchronous
536 char *infn
, *outfn
, *errfn
, *currdn
;
538 /* close these files so subprocess can write to them */
540 if (fd_error
!= outfilefd
)
542 fd1
= -1; /* No harm in closing that one! */
544 infn
= XSTRING (infile
)->data
;
546 if (NILP (error_file
))
548 else if (EQ (Qt
, error_file
))
551 errfn
= XSTRING (error_file
)->data
;
552 currdn
= XSTRING (current_dir
)->data
;
553 pid
= run_mac_command (new_argv
, currdn
, infn
, outfn
, errfn
);
555 /* Record that the synchronous process exited and note its
556 termination status. */
557 synch_process_alive
= 0;
558 synch_process_retcode
= pid
;
559 if (synch_process_retcode
< 0) /* means it couldn't be exec'ed */
561 synchronize_system_messages_locale ();
562 synch_process_death
= strerror (errno
);
565 /* Since CRLF is converted to LF within `decode_coding', we can
566 always open a file with binary mode. */
567 fd
[0] = open (tempfile
, O_BINARY
);
572 report_file_error ("Cannot re-open temporary file", Qnil
);
575 #else /* not macintosh */
576 #ifdef MSDOS /* MW, July 1993 */
577 /* Note that on MSDOS `child_setup' actually returns the child process
578 exit status, not its PID, so we assign it to `synch_process_retcode'
580 pid
= child_setup (filefd
, outfilefd
, fd_error
, (char **) new_argv
,
583 /* Record that the synchronous process exited and note its
584 termination status. */
585 synch_process_alive
= 0;
586 synch_process_retcode
= pid
;
587 if (synch_process_retcode
< 0) /* means it couldn't be exec'ed */
589 synchronize_system_messages_locale ();
590 synch_process_death
= strerror (errno
);
593 emacs_close (outfilefd
);
594 if (fd_error
!= outfilefd
)
595 emacs_close (fd_error
);
596 fd1
= -1; /* No harm in closing that one! */
597 /* Since CRLF is converted to LF within `decode_coding', we can
598 always open a file with binary mode. */
599 fd
[0] = emacs_open (tempfile
, O_RDONLY
| O_BINARY
, 0);
603 emacs_close (filefd
);
604 report_file_error ("Cannot re-open temporary file", Qnil
);
606 #else /* not MSDOS */
608 pid
= child_setup (filefd
, fd1
, fd_error
, (char **) new_argv
,
610 #else /* not WINDOWSNT */
620 #if defined (USG) && !defined (BSD_PGRPS)
625 child_setup (filefd
, fd1
, fd_error
, (char **) new_argv
,
628 #endif /* not WINDOWSNT */
630 /* The MSDOS case did this already. */
632 emacs_close (fd_error
);
633 #endif /* not MSDOS */
634 #endif /* not macintosh */
636 environ
= save_environ
;
638 /* Close most of our fd's, but not fd[0]
639 since we will use that to read input from. */
640 emacs_close (filefd
);
641 if (fd1
>= 0 && fd1
!= fd_error
)
649 report_file_error ("Doing vfork", Qnil
);
652 if (INTEGERP (buffer
))
657 /* If Emacs has been built with asynchronous subprocess support,
658 we don't need to do this, I think because it will then have
659 the facilities for handling SIGCHLD. */
660 wait_without_blocking ();
661 #endif /* subprocesses */
665 /* Enable sending signal if user quits below. */
666 call_process_exited
= 0;
668 #if defined(MSDOS) || defined(macintosh)
669 /* MSDOS needs different cleanup information. */
670 record_unwind_protect (call_process_cleanup
,
671 Fcons (make_number (fd
[0]), build_string (tempfile
)));
673 record_unwind_protect (call_process_cleanup
,
674 Fcons (make_number (fd
[0]), make_number (pid
)));
675 #endif /* not MSDOS and not macintosh */
678 if (BUFFERP (buffer
))
679 Fset_buffer (buffer
);
683 /* If BUFFER is nil, we must read process output once and then
684 discard it, so setup coding system but with nil. */
685 setup_coding_system (Qnil
, &process_coding
);
689 Lisp_Object val
, *args2
;
692 if (!NILP (Vcoding_system_for_read
))
693 val
= Vcoding_system_for_read
;
696 if (EQ (coding_systems
, Qt
))
700 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
701 args2
[0] = Qcall_process
;
702 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
704 = Ffind_operation_coding_system (nargs
+ 1, args2
);
706 if (CONSP (coding_systems
))
707 val
= XCAR (coding_systems
);
708 else if (CONSP (Vdefault_process_coding_system
))
709 val
= XCAR (Vdefault_process_coding_system
);
713 Fcheck_coding_system (val
);
714 /* In unibyte mode, character code conversion should not take
715 place but EOL conversion should. So, setup raw-text or one
716 of the subsidiary according to the information just setup. */
717 if (NILP (current_buffer
->enable_multibyte_characters
)
719 val
= raw_text_coding_system (val
);
720 setup_coding_system (val
, &process_coding
);
731 int display_on_the_fly
= !NILP (display
) && INTERACTIVE
;
732 struct coding_system saved_coding
;
733 int pt_orig
= PT
, pt_byte_orig
= PT_BYTE
;
736 saved_coding
= process_coding
;
739 /* Repeatedly read until we've filled as much as possible
740 of the buffer size we have. But don't read
741 less than 1024--save that for the next bufferful. */
743 while (nread
< bufsize
- 1024)
745 int this_read
= emacs_read (fd
[0], bufptr
+ nread
,
753 process_coding
.mode
|= CODING_MODE_LAST_BLOCK
;
758 total_read
+= this_read
;
760 if (display_on_the_fly
)
764 /* Now NREAD is the total amount of data in the buffer. */
769 if (! CODING_MAY_REQUIRE_DECODING (&process_coding
))
770 insert_1_both (bufptr
, nread
, nread
, 0, 1, 0);
772 { /* We have to decode the input. */
775 XSETBUFFER (buf
, current_buffer
);
776 decode_coding_c_string (&process_coding
, bufptr
, nread
,
778 if (display_on_the_fly
779 && CODING_REQUIRE_DETECTION (&saved_coding
)
780 && ! CODING_REQUIRE_DETECTION (&process_coding
))
782 /* We have detected some coding system. But,
783 there's a possibility that the detection was
784 done by insufficient data. So, we give up
785 displaying on the fly. */
786 if (process_coding
.produced
> 0)
787 del_range_2 (process_coding
.dst_pos
,
788 process_coding
.dst_pos_byte
,
789 process_coding
.dst_pos
790 + process_coding
.produced_char
,
791 process_coding
.dst_pos_byte
792 + process_coding
.produced
, 0);
793 display_on_the_fly
= 0;
794 process_coding
= saved_coding
;
799 TEMP_SET_PT_BOTH (PT
+ process_coding
.produced_char
,
800 PT_BYTE
+ process_coding
.produced
);
801 nread
-= process_coding
.consumed
;
804 /* As CARRYOVER should not be that large, we had
805 better avoid overhead of bcopy. */
806 BCOPY_SHORT (bufptr
+ process_coding
.consumed
, bufptr
,
811 if (process_coding
.mode
& CODING_MODE_LAST_BLOCK
)
814 /* Make the buffer bigger as we continue to read more data,
816 if (bufsize
< 64 * 1024 && total_read
> 32 * bufsize
)
821 tempptr
= (char *) alloca (bufsize
);
822 bcopy (bufptr
, tempptr
, bufsize
/ 2);
826 if (!NILP (display
) && INTERACTIVE
)
829 prepare_menu_bars ();
831 redisplay_preserve_echo_area (1);
838 Vlast_coding_system_used
= CODING_ID_NAME (process_coding
.id
);
839 /* If the caller required, let the buffer inherit the
840 coding-system used to decode the process output. */
841 if (inherit_process_coding_system
)
842 call1 (intern ("after-insert-file-set-buffer-file-coding-system"),
843 make_number (total_read
));
846 /* Wait for it to terminate, unless it already has. */
847 wait_for_termination (pid
);
851 set_buffer_internal (old
);
853 /* Don't kill any children that the subprocess may have left behind
855 call_process_exited
= 1;
857 unbind_to (count
, Qnil
);
859 if (synch_process_death
)
860 return code_convert_string_norecord (build_string (synch_process_death
),
861 Vlocale_coding_system
, 0);
862 return make_number (synch_process_retcode
);
867 delete_temp_file (name
)
870 /* Use Fdelete_file (indirectly) because that runs a file name handler.
871 We did that when writing the file, so we should do so when deleting. */
872 internal_delete_file (name
);
876 DEFUN ("call-process-region", Fcall_process_region
, Scall_process_region
,
878 doc
: /* Send text from START to END to a synchronous process running PROGRAM.
879 The remaining arguments are optional.
880 Delete the text if fourth arg DELETE is non-nil.
882 Insert output in BUFFER before point; t means current buffer;
883 nil for BUFFER means discard it; 0 means discard and don't wait.
884 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
885 REAL-BUFFER says what to do with standard output, as above,
886 while STDERR-FILE says what to do with standard error in the child.
887 STDERR-FILE may be nil (discard standard error output),
888 t (mix it with ordinary output), or a file name string.
890 Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.
891 Remaining args are passed to PROGRAM at startup as command args.
893 If BUFFER is nil, `call-process-region' returns immediately with value nil.
894 Otherwise it waits for PROGRAM to terminate
895 and returns a numeric exit status or a signal description string.
896 If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
898 usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */)
901 register Lisp_Object
*args
;
904 Lisp_Object filename_string
;
905 register Lisp_Object start
, end
;
906 int count
= specpdl_ptr
- specpdl
;
907 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
908 Lisp_Object coding_systems
;
909 Lisp_Object val
, *args2
;
915 if ((outf
= egetenv ("TMPDIR"))
916 || (outf
= egetenv ("TMP"))
917 || (outf
= egetenv ("TEMP")))
918 strcpy (tempfile
= alloca (strlen (outf
) + 20), outf
);
921 tempfile
= alloca (20);
924 if (!IS_DIRECTORY_SEP (tempfile
[strlen (tempfile
) - 1]))
925 strcat (tempfile
, "/");
926 if ('/' == DIRECTORY_SEP
)
927 dostounix_filename (tempfile
);
929 unixtodos_filename (tempfile
);
931 strcat (tempfile
, "emXXXXXX");
933 strcat (tempfile
, "detmp.XXX");
935 #else /* not DOS_NT */
936 char *tempfile
= (char *) alloca (STRING_BYTES (XSTRING (Vtemp_file_name_pattern
)) + 1);
937 bcopy (XSTRING (Vtemp_file_name_pattern
)->data
, tempfile
,
938 STRING_BYTES (XSTRING (Vtemp_file_name_pattern
)) + 1);
939 #endif /* not DOS_NT */
945 int fd
= mkstemp (tempfile
);
947 report_file_error ("Failed to open temporary file",
948 Fcons (Vtemp_file_name_pattern
, Qnil
));
956 filename_string
= build_string (tempfile
);
957 GCPRO1 (filename_string
);
960 /* Decide coding-system of the contents of the temporary file. */
961 if (!NILP (Vcoding_system_for_write
))
962 val
= Vcoding_system_for_write
;
963 else if (NILP (current_buffer
->enable_multibyte_characters
))
967 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
968 args2
[0] = Qcall_process_region
;
969 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
970 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
971 if (CONSP (coding_systems
))
972 val
= XCDR (coding_systems
);
973 else if (CONSP (Vdefault_process_coding_system
))
974 val
= XCDR (Vdefault_process_coding_system
);
980 int count1
= specpdl_ptr
- specpdl
;
982 specbind (intern ("coding-system-for-write"), val
);
983 Fwrite_region (start
, end
, filename_string
, Qnil
, Qlambda
, Qnil
, Qnil
);
985 unbind_to (count1
, Qnil
);
988 /* Note that Fcall_process takes care of binding
989 coding-system-for-read. */
991 record_unwind_protect (delete_temp_file
, filename_string
);
993 if (nargs
> 3 && !NILP (args
[3]))
994 Fdelete_region (start
, end
);
1006 args
[1] = filename_string
;
1008 RETURN_UNGCPRO (unbind_to (count
, Fcall_process (nargs
, args
)));
1011 #ifndef VMS /* VMS version is in vmsproc.c. */
1013 static int relocate_fd ();
1015 /* This is the last thing run in a newly forked inferior
1016 either synchronous or asynchronous.
1017 Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2.
1018 Initialize inferior's priority, pgrp, connected dir and environment.
1019 then exec another program based on new_argv.
1021 This function may change environ for the superior process.
1022 Therefore, the superior process must save and restore the value
1023 of environ around the vfork and the call to this function.
1025 SET_PGRP is nonzero if we should put the subprocess into a separate
1028 CURRENT_DIR is an elisp string giving the path of the current
1029 directory the subprocess should have. Since we can't really signal
1030 a decent error from within the child, this should be verified as an
1031 executable directory by the parent. */
1034 child_setup (in
, out
, err
, new_argv
, set_pgrp
, current_dir
)
1036 register char **new_argv
;
1038 Lisp_Object current_dir
;
1045 #endif /* WINDOWSNT */
1047 int pid
= getpid ();
1049 #ifdef SET_EMACS_PRIORITY
1051 extern int emacs_priority
;
1053 if (emacs_priority
< 0)
1054 nice (- emacs_priority
);
1059 /* Close Emacs's descriptors that this process should not have. */
1060 close_process_descs ();
1062 /* DOS_NT isn't in a vfork, so if we are in the middle of load-file,
1063 we will lose if we call close_load_descs here. */
1065 close_load_descs ();
1068 /* Note that use of alloca is always safe here. It's obvious for systems
1069 that do not have true vfork or that have true (stack) alloca.
1070 If using vfork and C_ALLOCA it is safe because that changes
1071 the superior's static variables as if the superior had done alloca
1072 and will be cleaned up in the usual way. */
1074 register char *temp
;
1077 i
= STRING_BYTES (XSTRING (current_dir
));
1079 /* MSDOS must have all environment variables malloc'ed, because
1080 low-level libc functions that launch subsidiary processes rely
1082 pwd_var
= (char *) xmalloc (i
+ 6);
1084 pwd_var
= (char *) alloca (i
+ 6);
1087 bcopy ("PWD=", pwd_var
, 4);
1088 bcopy (XSTRING (current_dir
)->data
, temp
, i
);
1089 if (!IS_DIRECTORY_SEP (temp
[i
- 1])) temp
[i
++] = DIRECTORY_SEP
;
1093 /* We can't signal an Elisp error here; we're in a vfork. Since
1094 the callers check the current directory before forking, this
1095 should only return an error if the directory's permissions
1096 are changed between the check and this chdir, but we should
1098 if (chdir (temp
) < 0)
1103 /* Get past the drive letter, so that d:/ is left alone. */
1104 if (i
> 2 && IS_DEVICE_SEP (temp
[1]) && IS_DIRECTORY_SEP (temp
[2]))
1111 /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */
1112 while (i
> 2 && IS_DIRECTORY_SEP (temp
[i
- 1]))
1116 /* Set `env' to a vector of the strings in Vprocess_environment. */
1118 register Lisp_Object tem
;
1119 register char **new_env
;
1120 register int new_length
;
1123 for (tem
= Vprocess_environment
;
1124 CONSP (tem
) && STRINGP (XCAR (tem
));
1128 /* new_length + 2 to include PWD and terminating 0. */
1129 env
= new_env
= (char **) alloca ((new_length
+ 2) * sizeof (char *));
1131 /* If we have a PWD envvar, pass one down,
1132 but with corrected value. */
1134 *new_env
++ = pwd_var
;
1136 /* Copy the Vprocess_environment strings into new_env. */
1137 for (tem
= Vprocess_environment
;
1138 CONSP (tem
) && STRINGP (XCAR (tem
));
1142 char *string
= (char *) XSTRING (XCAR (tem
))->data
;
1143 /* See if this string duplicates any string already in the env.
1144 If so, don't put it in.
1145 When an env var has multiple definitions,
1146 we keep the definition that comes first in process-environment. */
1147 for (; ep
!= new_env
; ep
++)
1149 char *p
= *ep
, *q
= string
;
1153 /* The string is malformed; might as well drop it. */
1162 *new_env
++ = string
;
1168 prepare_standard_handles (in
, out
, err
, handles
);
1169 set_process_dir (XSTRING (current_dir
)->data
);
1170 #else /* not WINDOWSNT */
1171 /* Make sure that in, out, and err are not actually already in
1172 descriptors zero, one, or two; this could happen if Emacs is
1173 started with its standard in, out, or error closed, as might
1176 int oin
= in
, oout
= out
;
1178 /* We have to avoid relocating the same descriptor twice! */
1180 in
= relocate_fd (in
, 3);
1185 out
= relocate_fd (out
, 3);
1189 else if (err
== oout
)
1192 err
= relocate_fd (err
, 3);
1206 #endif /* not MSDOS */
1207 #endif /* not WINDOWSNT */
1209 #if defined(USG) && !defined(BSD_PGRPS)
1210 #ifndef SETPGRP_RELEASES_CTTY
1211 setpgrp (); /* No arguments but equivalent in this case */
1216 /* setpgrp_of_tty is incorrect here; it uses input_fd. */
1217 EMACS_SET_TTY_PGRP (0, &pid
);
1220 pid
= run_msdos_command (new_argv
, pwd_var
+ 4, in
, out
, err
, env
);
1223 /* An error occurred while trying to run the subprocess. */
1224 report_file_error ("Spawning child process", Qnil
);
1226 #else /* not MSDOS */
1228 /* Spawn the child. (See ntproc.c:Spawnve). */
1229 cpid
= spawnve (_P_NOWAIT
, new_argv
[0], new_argv
, env
);
1230 reset_standard_handles (in
, out
, err
, handles
);
1232 /* An error occurred while trying to spawn the process. */
1233 report_file_error ("Spawning child process", Qnil
);
1235 #else /* not WINDOWSNT */
1236 /* execvp does not accept an environment arg so the only way
1237 to pass this environment is to set environ. Our caller
1238 is responsible for restoring the ambient value of environ. */
1240 execvp (new_argv
[0], new_argv
);
1242 emacs_write (1, "Can't exec program: ", 20);
1243 emacs_write (1, new_argv
[0], strlen (new_argv
[0]));
1244 emacs_write (1, "\n", 1);
1246 #endif /* not WINDOWSNT */
1247 #endif /* not MSDOS */
1250 /* Move the file descriptor FD so that its number is not less than MINFD.
1251 If the file descriptor is moved at all, the original is freed. */
1253 relocate_fd (fd
, minfd
)
1263 char *message1
= "Error while setting up child: ";
1264 char *errmessage
= strerror (errno
);
1265 char *message2
= "\n";
1266 emacs_write (2, message1
, strlen (message1
));
1267 emacs_write (2, errmessage
, strlen (errmessage
));
1268 emacs_write (2, message2
, strlen (message2
));
1271 /* Note that we hold the original FD open while we recurse,
1272 to guarantee we'll get a new FD if we need it. */
1273 new = relocate_fd (new, minfd
);
1280 getenv_internal (var
, varlen
, value
, valuelen
)
1288 for (scan
= Vprocess_environment
; CONSP (scan
); scan
= XCDR (scan
))
1292 entry
= XCAR (scan
);
1294 && STRING_BYTES (XSTRING (entry
)) > varlen
1295 && XSTRING (entry
)->data
[varlen
] == '='
1297 /* NT environment variables are case insensitive. */
1298 && ! strnicmp (XSTRING (entry
)->data
, var
, varlen
)
1299 #else /* not WINDOWSNT */
1300 && ! bcmp (XSTRING (entry
)->data
, var
, varlen
)
1301 #endif /* not WINDOWSNT */
1304 *value
= (char *) XSTRING (entry
)->data
+ (varlen
+ 1);
1305 *valuelen
= STRING_BYTES (XSTRING (entry
)) - (varlen
+ 1);
1313 DEFUN ("getenv-internal", Fgetenv_internal
, Sgetenv_internal
, 1, 1, 0,
1314 doc
: /* Return the value of environment variable VAR, as a string.
1315 VAR should be a string. Value is nil if VAR is undefined in the environment.
1316 This function consults the variable ``process-environment'' for its value. */)
1324 if (getenv_internal (XSTRING (var
)->data
, STRING_BYTES (XSTRING (var
)),
1326 return make_string (value
, valuelen
);
1331 /* A version of getenv that consults process_environment, easily
1340 if (getenv_internal (var
, strlen (var
), &value
, &valuelen
))
1346 #endif /* not VMS */
1348 /* This is run before init_cmdargs. */
1353 char *data_dir
= egetenv ("EMACSDATA");
1354 char *doc_dir
= egetenv ("EMACSDOC");
1357 = Ffile_name_as_directory (build_string (data_dir
? data_dir
1360 = Ffile_name_as_directory (build_string (doc_dir
? doc_dir
1363 /* Check the EMACSPATH environment variable, defaulting to the
1364 PATH_EXEC path from epaths.h. */
1365 Vexec_path
= decode_env_path ("EMACSPATH", PATH_EXEC
);
1366 Vexec_directory
= Ffile_name_as_directory (Fcar (Vexec_path
));
1367 Vexec_path
= nconc2 (decode_env_path ("PATH", ""), Vexec_path
);
1370 /* This is run after init_cmdargs, when Vinstallation_directory is valid. */
1375 char *data_dir
= egetenv ("EMACSDATA");
1378 Lisp_Object tempdir
;
1380 if (!NILP (Vinstallation_directory
))
1382 /* Add to the path the lib-src subdir of the installation dir. */
1384 tem
= Fexpand_file_name (build_string ("lib-src"),
1385 Vinstallation_directory
);
1387 /* MSDOS uses wrapped binaries, so don't do this. */
1388 if (NILP (Fmember (tem
, Vexec_path
)))
1390 Vexec_path
= decode_env_path ("EMACSPATH", PATH_EXEC
);
1391 Vexec_path
= Fcons (tem
, Vexec_path
);
1392 Vexec_path
= nconc2 (decode_env_path ("PATH", ""), Vexec_path
);
1395 Vexec_directory
= Ffile_name_as_directory (tem
);
1396 #endif /* not DOS_NT */
1398 /* Maybe use ../etc as well as ../lib-src. */
1401 tem
= Fexpand_file_name (build_string ("etc"),
1402 Vinstallation_directory
);
1403 Vdoc_directory
= Ffile_name_as_directory (tem
);
1407 /* Look for the files that should be in etc. We don't use
1408 Vinstallation_directory, because these files are never installed
1409 near the executable, and they are never in the build
1410 directory when that's different from the source directory.
1412 Instead, if these files are not in the nominal place, we try the
1413 source directory. */
1416 Lisp_Object tem
, tem1
, srcdir
;
1418 srcdir
= Fexpand_file_name (build_string ("../src/"),
1419 build_string (PATH_DUMPLOADSEARCH
));
1420 tem
= Fexpand_file_name (build_string ("GNU"), Vdata_directory
);
1421 tem1
= Ffile_exists_p (tem
);
1422 if (!NILP (Fequal (srcdir
, Vinvocation_directory
)) || NILP (tem1
))
1425 newdir
= Fexpand_file_name (build_string ("../etc/"),
1426 build_string (PATH_DUMPLOADSEARCH
));
1427 tem
= Fexpand_file_name (build_string ("GNU"), newdir
);
1428 tem1
= Ffile_exists_p (tem
);
1430 Vdata_directory
= newdir
;
1438 tempdir
= Fdirectory_file_name (Vexec_directory
);
1439 if (access (XSTRING (tempdir
)->data
, 0) < 0)
1440 dir_warning ("Warning: arch-dependent data dir (%s) does not exist.\n",
1444 tempdir
= Fdirectory_file_name (Vdata_directory
);
1445 if (access (XSTRING (tempdir
)->data
, 0) < 0)
1446 dir_warning ("Warning: arch-independent data dir (%s) does not exist.\n",
1450 Vshell_file_name
= build_string ("*dcl*");
1452 sh
= (char *) getenv ("SHELL");
1453 Vshell_file_name
= build_string (sh
? sh
: "/bin/sh");
1457 Vtemp_file_name_pattern
= build_string ("tmp:emacsXXXXXX.");
1459 if (getenv ("TMPDIR"))
1461 char *dir
= getenv ("TMPDIR");
1462 Vtemp_file_name_pattern
1463 = Fexpand_file_name (build_string ("emacsXXXXXX"),
1464 build_string (dir
));
1467 Vtemp_file_name_pattern
= build_string ("/tmp/emacsXXXXXX");
1472 set_process_environment ()
1474 register char **envp
;
1476 Vprocess_environment
= Qnil
;
1480 for (envp
= environ
; *envp
; envp
++)
1481 Vprocess_environment
= Fcons (build_string (*envp
),
1482 Vprocess_environment
);
1489 Qbuffer_file_type
= intern ("buffer-file-type");
1490 staticpro (&Qbuffer_file_type
);
1493 DEFVAR_LISP ("shell-file-name", &Vshell_file_name
,
1494 doc
: /* *File name to load inferior shells from.
1495 Initialized from the SHELL environment variable. */);
1497 DEFVAR_LISP ("exec-path", &Vexec_path
,
1498 doc
: /* *List of directories to search programs to run in subprocesses.
1499 Each element is a string (directory name) or nil (try default directory). */);
1501 DEFVAR_LISP ("exec-suffixes", &Vexec_suffixes
,
1502 doc
: /* *List of suffixes to try to find executable file names.
1503 Each element is a string. */);
1504 Vexec_suffixes
= Qnil
;
1506 DEFVAR_LISP ("exec-directory", &Vexec_directory
,
1507 doc
: /* Directory for executables for Emacs to invoke.
1508 More generally, this includes any architecture-dependent files
1509 that are built and installed from the Emacs distribution. */);
1511 DEFVAR_LISP ("data-directory", &Vdata_directory
,
1512 doc
: /* Directory of machine-independent files that come with GNU Emacs.
1513 These are files intended for Emacs to use while it runs. */);
1515 DEFVAR_LISP ("doc-directory", &Vdoc_directory
,
1516 doc
: /* Directory containing the DOC file that comes with GNU Emacs.
1517 This is usually the same as data-directory. */);
1519 DEFVAR_LISP ("configure-info-directory", &Vconfigure_info_directory
,
1520 doc
: /* For internal use by the build procedure only.
1521 This is the name of the directory in which the build procedure installed
1522 Emacs's info files; the default value for Info-default-directory-list
1524 Vconfigure_info_directory
= build_string (PATH_INFO
);
1526 DEFVAR_LISP ("temp-file-name-pattern", &Vtemp_file_name_pattern
,
1527 doc
: /* Pattern for making names for temporary files.
1528 This is used by `call-process-region'. */);
1529 /* This variable is initialized in init_callproc. */
1531 DEFVAR_LISP ("process-environment", &Vprocess_environment
,
1532 doc
: /* List of environment variables for subprocesses to inherit.
1533 Each element should be a string of the form ENVVARNAME=VALUE.
1534 If multiple entries define the same variable, the first one always
1536 The environment which Emacs inherits is placed in this variable
1537 when Emacs starts. */);
1540 defsubr (&Scall_process
);
1541 defsubr (&Sgetenv_internal
);
1543 defsubr (&Scall_process_region
);