1 /* Synchronous subprocess invocation for GNU Emacs.
2 Copyright (C) 1985,86,87,88,93,94,95,99, 2000,01,02,03,04
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>
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 /* Nonzero => this is the signal number that terminated the subprocess. */
127 int synch_process_termsig
;
129 /* If synch_process_death is zero,
130 this is exit code of synchronous subprocess. */
131 int synch_process_retcode
;
133 extern Lisp_Object Vdoc_file_name
;
135 extern Lisp_Object Vfile_name_coding_system
, Vdefault_file_name_coding_system
;
137 /* Clean up when exiting Fcall_process.
138 On MSDOS, delete the temporary file on any kind of termination.
139 On Unix, kill the process and any children on termination by signal. */
141 /* Nonzero if this is termination due to exit. */
142 static int call_process_exited
;
144 #ifndef VMS /* VMS version is in vmsproc.c. */
147 call_process_kill (fdpid
)
150 emacs_close (XFASTINT (Fcar (fdpid
)));
151 EMACS_KILLPG (XFASTINT (Fcdr (fdpid
)), SIGKILL
);
152 synch_process_alive
= 0;
157 call_process_cleanup (fdpid
)
160 #if defined (MSDOS) || defined (MAC_OS8)
161 /* for MSDOS fdpid is really (fd . tempfile) */
162 register Lisp_Object file
;
164 emacs_close (XFASTINT (Fcar (fdpid
)));
165 if (strcmp (SDATA (file
), NULL_DEVICE
) != 0)
166 unlink (SDATA (file
));
167 #else /* not MSDOS and not MAC_OS8 */
168 register int pid
= XFASTINT (Fcdr (fdpid
));
170 if (call_process_exited
)
172 emacs_close (XFASTINT (Fcar (fdpid
)));
176 if (EMACS_KILLPG (pid
, SIGINT
) == 0)
178 int count
= SPECPDL_INDEX ();
179 record_unwind_protect (call_process_kill
, fdpid
);
180 message1 ("Waiting for process to die...(type C-g again to kill it instantly)");
183 wait_for_termination (pid
);
185 specpdl_ptr
= specpdl
+ count
; /* Discard the unwind protect. */
186 message1 ("Waiting for process to die...done");
188 synch_process_alive
= 0;
189 emacs_close (XFASTINT (Fcar (fdpid
)));
190 #endif /* not MSDOS */
194 DEFUN ("call-process", Fcall_process
, Scall_process
, 1, MANY
, 0,
195 doc
: /* Call PROGRAM synchronously in separate process.
196 The remaining arguments are optional.
197 The program's input comes from file INFILE (nil means `/dev/null').
198 Insert output in BUFFER before point; t means current buffer;
199 nil for BUFFER means discard it; 0 means discard and don't wait.
200 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
201 REAL-BUFFER says what to do with standard output, as above,
202 while STDERR-FILE says what to do with standard error in the child.
203 STDERR-FILE may be nil (discard standard error output),
204 t (mix it with ordinary output), or a file name string.
206 Fourth arg DISPLAY non-nil means redisplay buffer as output is inserted.
207 Remaining arguments are strings passed as command arguments to PROGRAM.
209 If BUFFER is 0, `call-process' returns immediately with value nil.
210 Otherwise it waits for PROGRAM to terminate
211 and returns a numeric exit status or a signal description string.
212 If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
214 usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */)
217 register Lisp_Object
*args
;
219 Lisp_Object infile
, buffer
, current_dir
, path
;
226 int bufsize
= sizeof buf
;
227 int count
= SPECPDL_INDEX ();
229 register const unsigned char **new_argv
230 = (const unsigned char **) alloca ((max (2, nargs
- 2)) * sizeof (char *));
231 struct buffer
*old
= current_buffer
;
232 /* File to use for stderr in the child.
233 t means use same as standard output. */
234 Lisp_Object error_file
;
235 #ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
236 char *outf
, *tempfile
;
246 struct coding_system process_coding
; /* coding-system of process output */
247 struct coding_system argument_coding
; /* coding-system of arguments */
248 /* Set to the return value of Ffind_operation_coding_system. */
249 Lisp_Object coding_systems
;
251 /* Qt denotes that Ffind_operation_coding_system is not yet called. */
254 CHECK_STRING (args
[0]);
259 /* Without asynchronous processes we cannot have BUFFER == 0. */
261 && (INTEGERP (CONSP (args
[2]) ? XCAR (args
[2]) : args
[2])))
262 error ("Operating system cannot handle asynchronous subprocesses");
263 #endif /* subprocesses */
265 /* Decide the coding-system for giving arguments. */
267 Lisp_Object val
, *args2
;
270 /* If arguments are supplied, we may have to encode them. */
275 for (i
= 4; i
< nargs
; i
++)
276 CHECK_STRING (args
[i
]);
278 for (i
= 4; i
< nargs
; i
++)
279 if (STRING_MULTIBYTE (args
[i
]))
282 if (!NILP (Vcoding_system_for_write
))
283 val
= Vcoding_system_for_write
;
284 else if (! must_encode
)
288 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
289 args2
[0] = Qcall_process
;
290 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
291 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
292 if (CONSP (coding_systems
))
293 val
= XCDR (coding_systems
);
294 else if (CONSP (Vdefault_process_coding_system
))
295 val
= XCDR (Vdefault_process_coding_system
);
299 setup_coding_system (Fcheck_coding_system (val
), &argument_coding
);
303 if (nargs
>= 2 && ! NILP (args
[1]))
305 infile
= Fexpand_file_name (args
[1], current_buffer
->directory
);
306 CHECK_STRING (infile
);
309 infile
= build_string (NULL_DEVICE
);
315 /* If BUFFER is a list, its meaning is
316 (BUFFER-FOR-STDOUT FILE-FOR-STDERR). */
319 if (CONSP (XCDR (buffer
)))
321 Lisp_Object stderr_file
;
322 stderr_file
= XCAR (XCDR (buffer
));
324 if (NILP (stderr_file
) || EQ (Qt
, stderr_file
))
325 error_file
= stderr_file
;
327 error_file
= Fexpand_file_name (stderr_file
, Qnil
);
330 buffer
= XCAR (buffer
);
333 if (!(EQ (buffer
, Qnil
)
335 || INTEGERP (buffer
)))
337 Lisp_Object spec_buffer
;
338 spec_buffer
= buffer
;
339 buffer
= Fget_buffer_create (buffer
);
340 /* Mention the buffer name for a better error message. */
342 CHECK_BUFFER (spec_buffer
);
343 CHECK_BUFFER (buffer
);
349 /* Make sure that the child will be able to chdir to the current
350 buffer's current directory, or its unhandled equivalent. We
351 can't just have the child check for an error when it does the
352 chdir, since it's in a vfork.
354 We have to GCPRO around this because Fexpand_file_name,
355 Funhandled_file_name_directory, and Ffile_accessible_directory_p
356 might call a file name handling function. The argument list is
357 protected by the caller, so all we really have to worry about is
360 struct gcpro gcpro1
, gcpro2
, gcpro3
;
362 current_dir
= current_buffer
->directory
;
364 GCPRO3 (infile
, buffer
, current_dir
);
367 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
369 if (NILP (Ffile_accessible_directory_p (current_dir
)))
370 report_file_error ("Setting current directory",
371 Fcons (current_buffer
->directory
, Qnil
));
376 display_p
= INTERACTIVE
&& nargs
>= 4 && !NILP (args
[3]);
378 filefd
= emacs_open (SDATA (infile
), O_RDONLY
, 0);
381 report_file_error ("Opening process input file", Fcons (infile
, Qnil
));
383 /* Search for program; barf if not found. */
387 GCPRO1 (current_dir
);
388 openp (Vexec_path
, args
[0], Vexec_suffixes
, &path
, make_number (X_OK
));
393 emacs_close (filefd
);
394 report_file_error ("Searching for program", Fcons (args
[0], Qnil
));
397 /* If program file name starts with /: for quoting a magic name,
399 if (SBYTES (path
) > 2 && SREF (path
, 0) == '/'
400 && SREF (path
, 1) == ':')
401 path
= Fsubstring (path
, make_number (2), Qnil
);
403 new_argv
[0] = SDATA (path
);
407 struct gcpro gcpro1
, gcpro2
, gcpro3
;
409 GCPRO3 (infile
, buffer
, current_dir
);
410 argument_coding
.dst_multibyte
= 0;
411 for (i
= 4; i
< nargs
; i
++)
413 argument_coding
.src_multibyte
= STRING_MULTIBYTE (args
[i
]);
414 if (CODING_REQUIRE_ENCODING (&argument_coding
))
416 /* We must encode this argument. */
417 args
[i
] = encode_coding_string (args
[i
], &argument_coding
, 1);
418 if (argument_coding
.type
== coding_type_ccl
)
419 setup_ccl_program (&(argument_coding
.spec
.ccl
.encoder
), Qnil
);
421 new_argv
[i
- 3] = SDATA (args
[i
]);
424 new_argv
[nargs
- 3] = 0;
429 #ifdef MSDOS /* MW, July 1993 */
430 if ((outf
= egetenv ("TMPDIR")))
431 strcpy (tempfile
= alloca (strlen (outf
) + 20), outf
);
434 tempfile
= alloca (20);
437 dostounix_filename (tempfile
);
438 if (*tempfile
== '\0' || tempfile
[strlen (tempfile
) - 1] != '/')
439 strcat (tempfile
, "/");
440 strcat (tempfile
, "detmp.XXX");
443 outfilefd
= creat (tempfile
, S_IREAD
| S_IWRITE
);
446 emacs_close (filefd
);
447 report_file_error ("Opening process output file",
448 Fcons (build_string (tempfile
), Qnil
));
455 /* Since we don't have pipes on the Mac, create a temporary file to
456 hold the output of the subprocess. */
457 tempfile
= (char *) alloca (SBYTES (Vtemp_file_name_pattern
) + 1);
458 bcopy (SDATA (Vtemp_file_name_pattern
), tempfile
,
459 SBYTES (Vtemp_file_name_pattern
) + 1);
463 outfilefd
= creat (tempfile
, S_IREAD
| S_IWRITE
);
467 report_file_error ("Opening process output file",
468 Fcons (build_string (tempfile
), Qnil
));
474 if (INTEGERP (buffer
))
475 fd
[1] = emacs_open (NULL_DEVICE
, O_WRONLY
, 0), fd
[0] = -1;
483 emacs_close (filefd
);
484 report_file_error ("Creating process pipe", Qnil
);
489 /* Replaced by close_process_descs */
490 set_exclusive_use (fd
[0]);
495 /* child_setup must clobber environ in systems with true vfork.
496 Protect it from permanent change. */
497 register char **save_environ
= environ
;
498 register int fd1
= fd
[1];
501 #if 0 /* Some systems don't have sigblock. */
502 mask
= sigblock (sigmask (SIGCHLD
));
505 /* Record that we're about to create a synchronous process. */
506 synch_process_alive
= 1;
508 /* These vars record information from process termination.
509 Clear them now before process can possibly terminate,
510 to avoid timing error if process terminates soon. */
511 synch_process_death
= 0;
512 synch_process_retcode
= 0;
513 synch_process_termsig
= 0;
515 if (NILP (error_file
))
516 fd_error
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
517 else if (STRINGP (error_file
))
520 fd_error
= emacs_open (SDATA (error_file
),
521 O_WRONLY
| O_TRUNC
| O_CREAT
| O_TEXT
,
523 #else /* not DOS_NT */
524 fd_error
= creat (SDATA (error_file
), 0666);
525 #endif /* not DOS_NT */
530 emacs_close (filefd
);
538 report_file_error ("Cannot redirect stderr",
539 Fcons ((NILP (error_file
)
540 ? build_string (NULL_DEVICE
) : error_file
),
544 current_dir
= ENCODE_FILE (current_dir
);
548 /* Call run_mac_command in sysdep.c here directly instead of doing
549 a child_setup as for MSDOS and other platforms. Note that this
550 code does not handle passing the environment to the synchronous
552 char *infn
, *outfn
, *errfn
, *currdn
;
554 /* close these files so subprocess can write to them */
556 if (fd_error
!= outfilefd
)
558 fd1
= -1; /* No harm in closing that one! */
560 infn
= SDATA (infile
);
562 if (NILP (error_file
))
564 else if (EQ (Qt
, error_file
))
567 errfn
= SDATA (error_file
);
568 currdn
= SDATA (current_dir
);
569 pid
= run_mac_command (new_argv
, currdn
, infn
, outfn
, errfn
);
571 /* Record that the synchronous process exited and note its
572 termination status. */
573 synch_process_alive
= 0;
574 synch_process_retcode
= pid
;
575 if (synch_process_retcode
< 0) /* means it couldn't be exec'ed */
577 synchronize_system_messages_locale ();
578 synch_process_death
= strerror (errno
);
581 /* Since CRLF is converted to LF within `decode_coding', we can
582 always open a file with binary mode. */
583 fd
[0] = open (tempfile
, O_BINARY
);
588 report_file_error ("Cannot re-open temporary file", Qnil
);
591 #else /* not MAC_OS8 */
592 #ifdef MSDOS /* MW, July 1993 */
593 /* Note that on MSDOS `child_setup' actually returns the child process
594 exit status, not its PID, so we assign it to `synch_process_retcode'
596 pid
= child_setup (filefd
, outfilefd
, fd_error
, (char **) new_argv
,
599 /* Record that the synchronous process exited and note its
600 termination status. */
601 synch_process_alive
= 0;
602 synch_process_retcode
= pid
;
603 if (synch_process_retcode
< 0) /* means it couldn't be exec'ed */
605 synchronize_system_messages_locale ();
606 synch_process_death
= strerror (errno
);
609 emacs_close (outfilefd
);
610 if (fd_error
!= outfilefd
)
611 emacs_close (fd_error
);
612 fd1
= -1; /* No harm in closing that one! */
613 /* Since CRLF is converted to LF within `decode_coding', we can
614 always open a file with binary mode. */
615 fd
[0] = emacs_open (tempfile
, O_RDONLY
| O_BINARY
, 0);
619 emacs_close (filefd
);
620 report_file_error ("Cannot re-open temporary file", Qnil
);
622 #else /* not MSDOS */
624 pid
= child_setup (filefd
, fd1
, fd_error
, (char **) new_argv
,
626 #else /* not WINDOWSNT */
636 #if defined (USG) && !defined (BSD_PGRPS)
641 child_setup (filefd
, fd1
, fd_error
, (char **) new_argv
,
644 #endif /* not WINDOWSNT */
646 /* The MSDOS case did this already. */
648 emacs_close (fd_error
);
649 #endif /* not MSDOS */
650 #endif /* not MAC_OS8 */
652 environ
= save_environ
;
654 /* Close most of our fd's, but not fd[0]
655 since we will use that to read input from. */
656 emacs_close (filefd
);
657 if (fd1
>= 0 && fd1
!= fd_error
)
665 report_file_error ("Doing vfork", Qnil
);
668 if (INTEGERP (buffer
))
673 /* If Emacs has been built with asynchronous subprocess support,
674 we don't need to do this, I think because it will then have
675 the facilities for handling SIGCHLD. */
676 wait_without_blocking ();
677 #endif /* subprocesses */
681 /* Enable sending signal if user quits below. */
682 call_process_exited
= 0;
684 #if defined(MSDOS) || defined(MAC_OS8)
685 /* MSDOS needs different cleanup information. */
686 record_unwind_protect (call_process_cleanup
,
687 Fcons (make_number (fd
[0]), build_string (tempfile
)));
689 record_unwind_protect (call_process_cleanup
,
690 Fcons (make_number (fd
[0]), make_number (pid
)));
691 #endif /* not MSDOS and not MAC_OS8 */
694 if (BUFFERP (buffer
))
695 Fset_buffer (buffer
);
699 /* If BUFFER is nil, we must read process output once and then
700 discard it, so setup coding system but with nil. */
701 setup_coding_system (Qnil
, &process_coding
);
705 Lisp_Object val
, *args2
;
708 if (!NILP (Vcoding_system_for_read
))
709 val
= Vcoding_system_for_read
;
712 if (EQ (coding_systems
, Qt
))
716 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
717 args2
[0] = Qcall_process
;
718 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
720 = Ffind_operation_coding_system (nargs
+ 1, args2
);
722 if (CONSP (coding_systems
))
723 val
= XCAR (coding_systems
);
724 else if (CONSP (Vdefault_process_coding_system
))
725 val
= XCAR (Vdefault_process_coding_system
);
729 setup_coding_system (Fcheck_coding_system (val
), &process_coding
);
730 /* In unibyte mode, character code conversion should not take
731 place but EOL conversion should. So, setup raw-text or one
732 of the subsidiary according to the information just setup. */
733 if (NILP (current_buffer
->enable_multibyte_characters
)
735 setup_raw_text_coding_system (&process_coding
);
737 process_coding
.src_multibyte
= 0;
738 process_coding
.dst_multibyte
740 ? ! NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
741 : ! NILP (current_buffer
->enable_multibyte_characters
));
751 int display_on_the_fly
= display_p
;
752 struct coding_system saved_coding
;
753 int pt_orig
= PT
, pt_byte_orig
= PT_BYTE
;
756 saved_coding
= process_coding
;
757 if (process_coding
.composing
!= COMPOSITION_DISABLED
)
758 coding_allocate_composition_data (&process_coding
, PT
);
761 /* Repeatedly read until we've filled as much as possible
762 of the buffer size we have. But don't read
763 less than 1024--save that for the next bufferful. */
765 while (nread
< bufsize
- 1024)
767 int this_read
= emacs_read (fd
[0], bufptr
+ nread
,
775 process_coding
.mode
|= CODING_MODE_LAST_BLOCK
;
780 total_read
+= this_read
;
782 if (display_on_the_fly
)
786 /* Now NREAD is the total amount of data in the buffer. */
791 if (! CODING_MAY_REQUIRE_DECODING (&process_coding
))
792 insert_1_both (bufptr
, nread
, nread
, 0, 1, 0);
794 { /* We have to decode the input. */
799 size
= decoding_buffer_size (&process_coding
, nread
);
800 decoding_buf
= (char *) xmalloc (size
);
802 /* We can't use the macro CODING_REQUIRE_DETECTION
803 because it always returns nonzero if the coding
804 system requires EOL detection. Here, we have to
805 check only whether or not the coding system
806 requires text-encoding detection. */
807 if (process_coding
.type
== coding_type_undecided
)
809 detect_coding (&process_coding
, bufptr
, nread
);
810 if (process_coding
.composing
!= COMPOSITION_DISABLED
)
811 /* We have not yet allocated the composition
812 data because the coding type was undecided. */
813 coding_allocate_composition_data (&process_coding
, PT
);
815 if (process_coding
.cmp_data
)
816 process_coding
.cmp_data
->char_offset
= PT
;
818 decode_coding (&process_coding
, bufptr
, decoding_buf
,
821 if (display_on_the_fly
822 && saved_coding
.type
== coding_type_undecided
823 && process_coding
.type
!= coding_type_undecided
)
825 /* We have detected some coding system. But,
826 there's a possibility that the detection was
827 done by insufficient data. So, we try the code
828 detection again with more data. */
829 xfree (decoding_buf
);
830 display_on_the_fly
= 0;
831 process_coding
= saved_coding
;
833 /* This is to make the above condition always
834 fails in the future. */
835 saved_coding
.type
= coding_type_no_conversion
;
839 if (process_coding
.produced
> 0)
840 insert_1_both (decoding_buf
, process_coding
.produced_char
,
841 process_coding
.produced
, 0, 1, 0);
842 xfree (decoding_buf
);
844 if (process_coding
.result
== CODING_FINISH_INCONSISTENT_EOL
)
846 Lisp_Object eol_type
, coding
;
848 if (process_coding
.eol_type
== CODING_EOL_CR
)
850 /* CRs have been replaced with LFs. Undo
851 that in the text inserted above. */
854 move_gap_both (PT
, PT_BYTE
);
856 p
= BYTE_POS_ADDR (pt_byte_orig
);
857 for (; p
< GPT_ADDR
; ++p
)
861 else if (process_coding
.eol_type
== CODING_EOL_CRLF
)
863 /* CR LFs have been replaced with LFs. Undo
864 that by inserting CRs in front of LFs in
865 the text inserted above. */
866 EMACS_INT bytepos
, old_pt
, old_pt_byte
, nCR
;
869 old_pt_byte
= PT_BYTE
;
872 for (bytepos
= PT_BYTE
- 1;
873 bytepos
>= pt_byte_orig
;
875 if (FETCH_BYTE (bytepos
) == '\n')
877 EMACS_INT charpos
= BYTE_TO_CHAR (bytepos
);
878 TEMP_SET_PT_BOTH (charpos
, bytepos
);
879 insert_1_both ("\r", 1, 1, 0, 1, 0);
883 TEMP_SET_PT_BOTH (old_pt
+ nCR
, old_pt_byte
+ nCR
);
886 /* Set the coding system symbol to that for
888 eol_type
= Fget (saved_coding
.symbol
, Qeol_type
);
889 if (VECTORP (eol_type
)
890 && ASIZE (eol_type
) == 3
891 && SYMBOLP (AREF (eol_type
, CODING_EOL_LF
)))
892 coding
= AREF (eol_type
, CODING_EOL_LF
);
894 coding
= saved_coding
.symbol
;
896 process_coding
.symbol
= coding
;
897 process_coding
.eol_type
= CODING_EOL_LF
;
899 &= ~CODING_MODE_INHIBIT_INCONSISTENT_EOL
;
902 nread
-= process_coding
.consumed
;
905 /* As CARRYOVER should not be that large, we had
906 better avoid overhead of bcopy. */
907 BCOPY_SHORT (bufptr
+ process_coding
.consumed
, bufptr
,
909 if (process_coding
.result
== CODING_FINISH_INSUFFICIENT_CMP
)
911 /* The decoding ended because of insufficient data
912 area to record information about composition.
913 We must try decoding with additional data area
914 before reading more output for the process. */
915 coding_allocate_composition_data (&process_coding
, PT
);
916 goto repeat_decoding
;
921 if (process_coding
.mode
& CODING_MODE_LAST_BLOCK
)
924 /* Make the buffer bigger as we continue to read more data,
926 if (bufsize
< 64 * 1024 && total_read
> 32 * bufsize
)
931 tempptr
= (char *) alloca (bufsize
);
932 bcopy (bufptr
, tempptr
, bufsize
/ 2);
939 prepare_menu_bars ();
941 redisplay_preserve_echo_area (1);
942 /* This variable might have been set to 0 for code
943 detection. In that case, we set it back to 1 because
944 we should have already detected a coding system. */
945 display_on_the_fly
= 1;
953 && process_coding
.cmp_data
)
955 coding_restore_composition (&process_coding
, Fcurrent_buffer ());
956 coding_free_composition_data (&process_coding
);
960 int post_read_count
= SPECPDL_INDEX ();
962 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
963 inserted
= PT
- pt_orig
;
964 TEMP_SET_PT_BOTH (pt_orig
, pt_byte_orig
);
965 if (SYMBOLP (process_coding
.post_read_conversion
)
966 && !NILP (Ffboundp (process_coding
.post_read_conversion
)))
967 call1 (process_coding
.post_read_conversion
, make_number (inserted
));
969 Vlast_coding_system_used
= process_coding
.symbol
;
971 /* If the caller required, let the buffer inherit the
972 coding-system used to decode the process output. */
973 if (inherit_process_coding_system
)
974 call1 (intern ("after-insert-file-set-buffer-file-coding-system"),
975 make_number (total_read
));
977 unbind_to (post_read_count
, Qnil
);
981 /* Wait for it to terminate, unless it already has. */
982 wait_for_termination (pid
);
986 set_buffer_internal (old
);
988 /* Don't kill any children that the subprocess may have left behind
990 call_process_exited
= 1;
992 unbind_to (count
, Qnil
);
994 if (synch_process_termsig
)
998 synchronize_system_messages_locale ();
999 signame
= strsignal (synch_process_termsig
);
1002 signame
= "unknown";
1004 synch_process_death
= signame
;
1007 if (synch_process_death
)
1008 return code_convert_string_norecord (build_string (synch_process_death
),
1009 Vlocale_coding_system
, 0);
1010 return make_number (synch_process_retcode
);
1015 delete_temp_file (name
)
1018 /* Use Fdelete_file (indirectly) because that runs a file name handler.
1019 We did that when writing the file, so we should do so when deleting. */
1020 internal_delete_file (name
);
1024 DEFUN ("call-process-region", Fcall_process_region
, Scall_process_region
,
1026 doc
: /* Send text from START to END to a synchronous process running PROGRAM.
1027 The remaining arguments are optional.
1028 Delete the text if fourth arg DELETE is non-nil.
1030 Insert output in BUFFER before point; t means current buffer;
1031 nil for BUFFER means discard it; 0 means discard and don't wait.
1032 BUFFER can also have the form (REAL-BUFFER STDERR-FILE); in that case,
1033 REAL-BUFFER says what to do with standard output, as above,
1034 while STDERR-FILE says what to do with standard error in the child.
1035 STDERR-FILE may be nil (discard standard error output),
1036 t (mix it with ordinary output), or a file name string.
1038 Sixth arg DISPLAY non-nil means redisplay buffer as output is inserted.
1039 Remaining args are passed to PROGRAM at startup as command args.
1041 If BUFFER is 0, `call-process-region' returns immediately with value nil.
1042 Otherwise it waits for PROGRAM to terminate
1043 and returns a numeric exit status or a signal description string.
1044 If you quit, the process is killed with SIGINT, or SIGKILL if you quit again.
1046 usage: (call-process-region START END PROGRAM &optional DELETE BUFFER DISPLAY &rest ARGS) */)
1049 register Lisp_Object
*args
;
1051 struct gcpro gcpro1
;
1052 Lisp_Object filename_string
;
1053 register Lisp_Object start
, end
;
1054 int count
= SPECPDL_INDEX ();
1055 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1056 Lisp_Object coding_systems
;
1057 Lisp_Object val
, *args2
;
1063 if ((outf
= egetenv ("TMPDIR"))
1064 || (outf
= egetenv ("TMP"))
1065 || (outf
= egetenv ("TEMP")))
1066 strcpy (tempfile
= alloca (strlen (outf
) + 20), outf
);
1069 tempfile
= alloca (20);
1072 if (!IS_DIRECTORY_SEP (tempfile
[strlen (tempfile
) - 1]))
1073 strcat (tempfile
, "/");
1074 if ('/' == DIRECTORY_SEP
)
1075 dostounix_filename (tempfile
);
1077 unixtodos_filename (tempfile
);
1079 strcat (tempfile
, "emXXXXXX");
1081 strcat (tempfile
, "detmp.XXX");
1083 #else /* not DOS_NT */
1084 char *tempfile
= (char *) alloca (SBYTES (Vtemp_file_name_pattern
) + 1);
1085 bcopy (SDATA (Vtemp_file_name_pattern
), tempfile
,
1086 SBYTES (Vtemp_file_name_pattern
) + 1);
1087 #endif /* not DOS_NT */
1089 coding_systems
= Qt
;
1093 int fd
= mkstemp (tempfile
);
1095 report_file_error ("Failed to open temporary file",
1096 Fcons (Vtemp_file_name_pattern
, Qnil
));
1104 filename_string
= build_string (tempfile
);
1105 GCPRO1 (filename_string
);
1108 /* Decide coding-system of the contents of the temporary file. */
1109 if (!NILP (Vcoding_system_for_write
))
1110 val
= Vcoding_system_for_write
;
1111 else if (NILP (current_buffer
->enable_multibyte_characters
))
1115 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1116 args2
[0] = Qcall_process_region
;
1117 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1118 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1119 if (CONSP (coding_systems
))
1120 val
= XCDR (coding_systems
);
1121 else if (CONSP (Vdefault_process_coding_system
))
1122 val
= XCDR (Vdefault_process_coding_system
);
1128 int count1
= SPECPDL_INDEX ();
1130 specbind (intern ("coding-system-for-write"), val
);
1131 Fwrite_region (start
, end
, filename_string
, Qnil
, Qlambda
, Qnil
, Qnil
);
1133 unbind_to (count1
, Qnil
);
1136 /* Note that Fcall_process takes care of binding
1137 coding-system-for-read. */
1139 record_unwind_protect (delete_temp_file
, filename_string
);
1141 if (nargs
> 3 && !NILP (args
[3]))
1142 Fdelete_region (start
, end
);
1154 args
[1] = filename_string
;
1156 RETURN_UNGCPRO (unbind_to (count
, Fcall_process (nargs
, args
)));
1159 #ifndef VMS /* VMS version is in vmsproc.c. */
1161 static int relocate_fd ();
1163 /* This is the last thing run in a newly forked inferior
1164 either synchronous or asynchronous.
1165 Copy descriptors IN, OUT and ERR as descriptors 0, 1 and 2.
1166 Initialize inferior's priority, pgrp, connected dir and environment.
1167 then exec another program based on new_argv.
1169 This function may change environ for the superior process.
1170 Therefore, the superior process must save and restore the value
1171 of environ around the vfork and the call to this function.
1173 SET_PGRP is nonzero if we should put the subprocess into a separate
1176 CURRENT_DIR is an elisp string giving the path of the current
1177 directory the subprocess should have. Since we can't really signal
1178 a decent error from within the child, this should be verified as an
1179 executable directory by the parent. */
1182 child_setup (in
, out
, err
, new_argv
, set_pgrp
, current_dir
)
1184 register char **new_argv
;
1186 Lisp_Object current_dir
;
1193 #endif /* WINDOWSNT */
1195 int pid
= getpid ();
1197 #ifdef SET_EMACS_PRIORITY
1199 extern EMACS_INT emacs_priority
;
1201 if (emacs_priority
< 0)
1202 nice (- emacs_priority
);
1207 /* Close Emacs's descriptors that this process should not have. */
1208 close_process_descs ();
1210 /* DOS_NT isn't in a vfork, so if we are in the middle of load-file,
1211 we will lose if we call close_load_descs here. */
1213 close_load_descs ();
1216 /* Note that use of alloca is always safe here. It's obvious for systems
1217 that do not have true vfork or that have true (stack) alloca.
1218 If using vfork and C_ALLOCA it is safe because that changes
1219 the superior's static variables as if the superior had done alloca
1220 and will be cleaned up in the usual way. */
1222 register char *temp
;
1225 i
= SBYTES (current_dir
);
1227 /* MSDOS must have all environment variables malloc'ed, because
1228 low-level libc functions that launch subsidiary processes rely
1230 pwd_var
= (char *) xmalloc (i
+ 6);
1232 pwd_var
= (char *) alloca (i
+ 6);
1235 bcopy ("PWD=", pwd_var
, 4);
1236 bcopy (SDATA (current_dir
), temp
, i
);
1237 if (!IS_DIRECTORY_SEP (temp
[i
- 1])) temp
[i
++] = DIRECTORY_SEP
;
1241 /* We can't signal an Elisp error here; we're in a vfork. Since
1242 the callers check the current directory before forking, this
1243 should only return an error if the directory's permissions
1244 are changed between the check and this chdir, but we should
1246 if (chdir (temp
) < 0)
1251 /* Get past the drive letter, so that d:/ is left alone. */
1252 if (i
> 2 && IS_DEVICE_SEP (temp
[1]) && IS_DIRECTORY_SEP (temp
[2]))
1259 /* Strip trailing slashes for PWD, but leave "/" and "//" alone. */
1260 while (i
> 2 && IS_DIRECTORY_SEP (temp
[i
- 1]))
1264 /* Set `env' to a vector of the strings in Vprocess_environment. */
1266 register Lisp_Object tem
;
1267 register char **new_env
;
1268 register int new_length
;
1271 for (tem
= Vprocess_environment
;
1272 CONSP (tem
) && STRINGP (XCAR (tem
));
1276 /* new_length + 2 to include PWD and terminating 0. */
1277 env
= new_env
= (char **) alloca ((new_length
+ 2) * sizeof (char *));
1279 /* If we have a PWD envvar, pass one down,
1280 but with corrected value. */
1282 *new_env
++ = pwd_var
;
1284 /* Copy the Vprocess_environment strings into new_env. */
1285 for (tem
= Vprocess_environment
;
1286 CONSP (tem
) && STRINGP (XCAR (tem
));
1290 char *string
= (char *) SDATA (XCAR (tem
));
1291 /* See if this string duplicates any string already in the env.
1292 If so, don't put it in.
1293 When an env var has multiple definitions,
1294 we keep the definition that comes first in process-environment. */
1295 for (; ep
!= new_env
; ep
++)
1297 char *p
= *ep
, *q
= string
;
1301 /* The string is malformed; might as well drop it. */
1310 *new_env
++ = string
;
1316 prepare_standard_handles (in
, out
, err
, handles
);
1317 set_process_dir (SDATA (current_dir
));
1318 #else /* not WINDOWSNT */
1319 /* Make sure that in, out, and err are not actually already in
1320 descriptors zero, one, or two; this could happen if Emacs is
1321 started with its standard in, out, or error closed, as might
1324 int oin
= in
, oout
= out
;
1326 /* We have to avoid relocating the same descriptor twice! */
1328 in
= relocate_fd (in
, 3);
1333 out
= relocate_fd (out
, 3);
1337 else if (err
== oout
)
1340 err
= relocate_fd (err
, 3);
1354 #endif /* not MSDOS */
1355 #endif /* not WINDOWSNT */
1357 #if defined(USG) && !defined(BSD_PGRPS)
1358 #ifndef SETPGRP_RELEASES_CTTY
1359 setpgrp (); /* No arguments but equivalent in this case */
1364 /* setpgrp_of_tty is incorrect here; it uses input_fd. */
1365 EMACS_SET_TTY_PGRP (0, &pid
);
1368 pid
= run_msdos_command (new_argv
, pwd_var
+ 4, in
, out
, err
, env
);
1371 /* An error occurred while trying to run the subprocess. */
1372 report_file_error ("Spawning child process", Qnil
);
1374 #else /* not MSDOS */
1376 /* Spawn the child. (See ntproc.c:Spawnve). */
1377 cpid
= spawnve (_P_NOWAIT
, new_argv
[0], new_argv
, env
);
1378 reset_standard_handles (in
, out
, err
, handles
);
1380 /* An error occurred while trying to spawn the process. */
1381 report_file_error ("Spawning child process", Qnil
);
1383 #else /* not WINDOWSNT */
1384 /* execvp does not accept an environment arg so the only way
1385 to pass this environment is to set environ. Our caller
1386 is responsible for restoring the ambient value of environ. */
1388 execvp (new_argv
[0], new_argv
);
1390 emacs_write (1, "Can't exec program: ", 20);
1391 emacs_write (1, new_argv
[0], strlen (new_argv
[0]));
1392 emacs_write (1, "\n", 1);
1394 #endif /* not WINDOWSNT */
1395 #endif /* not MSDOS */
1398 /* Move the file descriptor FD so that its number is not less than MINFD.
1399 If the file descriptor is moved at all, the original is freed. */
1401 relocate_fd (fd
, minfd
)
1411 char *message1
= "Error while setting up child: ";
1412 char *errmessage
= strerror (errno
);
1413 char *message2
= "\n";
1414 emacs_write (2, message1
, strlen (message1
));
1415 emacs_write (2, errmessage
, strlen (errmessage
));
1416 emacs_write (2, message2
, strlen (message2
));
1419 /* Note that we hold the original FD open while we recurse,
1420 to guarantee we'll get a new FD if we need it. */
1421 new = relocate_fd (new, minfd
);
1428 getenv_internal (var
, varlen
, value
, valuelen
)
1436 for (scan
= Vprocess_environment
; CONSP (scan
); scan
= XCDR (scan
))
1440 entry
= XCAR (scan
);
1442 && SBYTES (entry
) > varlen
1443 && SREF (entry
, varlen
) == '='
1445 /* NT environment variables are case insensitive. */
1446 && ! strnicmp (SDATA (entry
), var
, varlen
)
1447 #else /* not WINDOWSNT */
1448 && ! bcmp (SDATA (entry
), var
, varlen
)
1449 #endif /* not WINDOWSNT */
1452 *value
= (char *) SDATA (entry
) + (varlen
+ 1);
1453 *valuelen
= SBYTES (entry
) - (varlen
+ 1);
1461 DEFUN ("getenv-internal", Fgetenv_internal
, Sgetenv_internal
, 1, 1, 0,
1462 doc
: /* Return the value of environment variable VAR, as a string.
1463 VAR should be a string. Value is nil if VAR is undefined in the environment.
1464 This function consults the variable ``process-environment'' for its value. */)
1472 if (getenv_internal (SDATA (var
), SBYTES (var
),
1474 return make_string (value
, valuelen
);
1479 /* A version of getenv that consults process_environment, easily
1488 if (getenv_internal (var
, strlen (var
), &value
, &valuelen
))
1494 #endif /* not VMS */
1496 /* This is run before init_cmdargs. */
1501 char *data_dir
= egetenv ("EMACSDATA");
1502 char *doc_dir
= egetenv ("EMACSDOC");
1505 = Ffile_name_as_directory (build_string (data_dir
? data_dir
1508 = Ffile_name_as_directory (build_string (doc_dir
? doc_dir
1511 /* Check the EMACSPATH environment variable, defaulting to the
1512 PATH_EXEC path from epaths.h. */
1513 Vexec_path
= decode_env_path ("EMACSPATH", PATH_EXEC
);
1514 Vexec_directory
= Ffile_name_as_directory (Fcar (Vexec_path
));
1515 Vexec_path
= nconc2 (decode_env_path ("PATH", ""), Vexec_path
);
1518 /* This is run after init_cmdargs, when Vinstallation_directory is valid. */
1523 char *data_dir
= egetenv ("EMACSDATA");
1526 Lisp_Object tempdir
;
1528 if (!NILP (Vinstallation_directory
))
1530 /* Add to the path the lib-src subdir of the installation dir. */
1532 tem
= Fexpand_file_name (build_string ("lib-src"),
1533 Vinstallation_directory
);
1535 /* MSDOS uses wrapped binaries, so don't do this. */
1536 if (NILP (Fmember (tem
, Vexec_path
)))
1538 Vexec_path
= decode_env_path ("EMACSPATH", PATH_EXEC
);
1539 Vexec_path
= Fcons (tem
, Vexec_path
);
1540 Vexec_path
= nconc2 (decode_env_path ("PATH", ""), Vexec_path
);
1543 Vexec_directory
= Ffile_name_as_directory (tem
);
1544 #endif /* not DOS_NT */
1546 /* Maybe use ../etc as well as ../lib-src. */
1549 tem
= Fexpand_file_name (build_string ("etc"),
1550 Vinstallation_directory
);
1551 Vdoc_directory
= Ffile_name_as_directory (tem
);
1555 /* Look for the files that should be in etc. We don't use
1556 Vinstallation_directory, because these files are never installed
1557 near the executable, and they are never in the build
1558 directory when that's different from the source directory.
1560 Instead, if these files are not in the nominal place, we try the
1561 source directory. */
1564 Lisp_Object tem
, tem1
, srcdir
;
1566 srcdir
= Fexpand_file_name (build_string ("../src/"),
1567 build_string (PATH_DUMPLOADSEARCH
));
1568 tem
= Fexpand_file_name (build_string ("GNU"), Vdata_directory
);
1569 tem1
= Ffile_exists_p (tem
);
1570 if (!NILP (Fequal (srcdir
, Vinvocation_directory
)) || NILP (tem1
))
1573 newdir
= Fexpand_file_name (build_string ("../etc/"),
1574 build_string (PATH_DUMPLOADSEARCH
));
1575 tem
= Fexpand_file_name (build_string ("GNU"), newdir
);
1576 tem1
= Ffile_exists_p (tem
);
1578 Vdata_directory
= newdir
;
1586 tempdir
= Fdirectory_file_name (Vexec_directory
);
1587 if (access (SDATA (tempdir
), 0) < 0)
1588 dir_warning ("Warning: arch-dependent data dir (%s) does not exist.\n",
1592 tempdir
= Fdirectory_file_name (Vdata_directory
);
1593 if (access (SDATA (tempdir
), 0) < 0)
1594 dir_warning ("Warning: arch-independent data dir (%s) does not exist.\n",
1598 Vshell_file_name
= build_string ("*dcl*");
1600 sh
= (char *) getenv ("SHELL");
1601 Vshell_file_name
= build_string (sh
? sh
: "/bin/sh");
1605 Vtemp_file_name_pattern
= build_string ("tmp:emacsXXXXXX.");
1607 if (getenv ("TMPDIR"))
1609 char *dir
= getenv ("TMPDIR");
1610 Vtemp_file_name_pattern
1611 = Fexpand_file_name (build_string ("emacsXXXXXX"),
1612 build_string (dir
));
1615 Vtemp_file_name_pattern
= build_string ("/tmp/emacsXXXXXX");
1619 Vshared_game_score_directory
= Qnil
;
1621 Vshared_game_score_directory
= build_string (PATH_GAME
);
1622 if (NILP (Ffile_directory_p (Vshared_game_score_directory
)))
1623 Vshared_game_score_directory
= Qnil
;
1628 set_process_environment ()
1630 register char **envp
;
1632 Vprocess_environment
= Qnil
;
1636 for (envp
= environ
; *envp
; envp
++)
1637 Vprocess_environment
= Fcons (build_string (*envp
),
1638 Vprocess_environment
);
1645 Qbuffer_file_type
= intern ("buffer-file-type");
1646 staticpro (&Qbuffer_file_type
);
1649 DEFVAR_LISP ("shell-file-name", &Vshell_file_name
,
1650 doc
: /* *File name to load inferior shells from.
1651 Initialized from the SHELL environment variable. */);
1653 DEFVAR_LISP ("exec-path", &Vexec_path
,
1654 doc
: /* *List of directories to search programs to run in subprocesses.
1655 Each element is a string (directory name) or nil (try default directory). */);
1657 DEFVAR_LISP ("exec-suffixes", &Vexec_suffixes
,
1658 doc
: /* *List of suffixes to try to find executable file names.
1659 Each element is a string. */);
1660 Vexec_suffixes
= Qnil
;
1662 DEFVAR_LISP ("exec-directory", &Vexec_directory
,
1663 doc
: /* Directory for executables for Emacs to invoke.
1664 More generally, this includes any architecture-dependent files
1665 that are built and installed from the Emacs distribution. */);
1667 DEFVAR_LISP ("data-directory", &Vdata_directory
,
1668 doc
: /* Directory of machine-independent files that come with GNU Emacs.
1669 These are files intended for Emacs to use while it runs. */);
1671 DEFVAR_LISP ("doc-directory", &Vdoc_directory
,
1672 doc
: /* Directory containing the DOC file that comes with GNU Emacs.
1673 This is usually the same as data-directory. */);
1675 DEFVAR_LISP ("configure-info-directory", &Vconfigure_info_directory
,
1676 doc
: /* For internal use by the build procedure only.
1677 This is the name of the directory in which the build procedure installed
1678 Emacs's info files; the default value for Info-default-directory-list
1680 Vconfigure_info_directory
= build_string (PATH_INFO
);
1682 DEFVAR_LISP ("shared-game-score-directory", &Vshared_game_score_directory
,
1683 doc
: /* Directory of score files for games which come with GNU Emacs.
1684 If this variable is nil, then Emacs is unable to use a shared directory. */);
1686 Vshared_game_score_directory
= Qnil
;
1688 Vshared_game_score_directory
= build_string (PATH_GAME
);
1691 DEFVAR_LISP ("temp-file-name-pattern", &Vtemp_file_name_pattern
,
1692 doc
: /* Pattern for making names for temporary files.
1693 This is used by `call-process-region'. */);
1694 /* This variable is initialized in init_callproc. */
1696 DEFVAR_LISP ("process-environment", &Vprocess_environment
,
1697 doc
: /* List of environment variables for subprocesses to inherit.
1698 Each element should be a string of the form ENVVARNAME=VALUE.
1699 If multiple entries define the same variable, the first one always
1701 The environment which Emacs inherits is placed in this variable
1703 Non-ASCII characters are encoded according to the initial value of
1704 `locale-coding-system', i.e. the elements must normally be decoded for use.
1705 See `setenv' and `getenv'. */);
1708 defsubr (&Scall_process
);
1709 defsubr (&Sgetenv_internal
);
1711 defsubr (&Scall_process_region
);
1714 /* arch-tag: 769b8045-1df7-4d2b-8968-e3fb49017f95
1715 (do not change this comment) */