1 /* File IO for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2003, 2004 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. */
29 #include <sys/types.h>
36 #if !defined (S_ISLNK) && defined (S_IFLNK)
37 # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
40 #if !defined (S_ISFIFO) && defined (S_IFIFO)
41 # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
44 #if !defined (S_ISREG) && defined (S_IFREG)
45 # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
76 #include "intervals.h"
87 #endif /* not WINDOWSNT */
91 #include <sys/param.h>
92 extern Lisp_Object Fmsdos_downcase_filename
P_ ((Lisp_Object
));
100 #define CORRECT_DIR_SEPS(s) \
101 do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \
102 else unixtodos_filename (s); \
104 /* On Windows, drive letters must be alphabetic - on DOS, the Netware
105 redirector allows the six letters between 'Z' and 'a' as well. */
107 #define IS_DRIVE(x) ((x) >= 'A' && (x) <= 'z')
110 #define IS_DRIVE(x) isalpha (x)
112 /* Need to lower-case the drive letter, or else expanded
113 filenames will sometimes compare inequal, because
114 `expand-file-name' doesn't always down-case the drive letter. */
115 #define DRIVE_LETTER(x) (tolower (x))
136 #include "commands.h"
137 extern int use_dialog_box
;
138 extern int use_file_dialog
;
152 /* Nonzero during writing of auto-save files */
155 /* Set by auto_save_1 to mode of original file so Fwrite_region will create
156 a new file with the same mode as the original */
157 int auto_save_mode_bits
;
159 /* The symbol bound to coding-system-for-read when
160 insert-file-contents is called for recovering a file. This is not
161 an actual coding system name, but just an indicator to tell
162 insert-file-contents to use `emacs-mule' with a special flag for
163 auto saving and recovering a file. */
164 Lisp_Object Qauto_save_coding
;
166 /* Coding system for file names, or nil if none. */
167 Lisp_Object Vfile_name_coding_system
;
169 /* Coding system for file names used only when
170 Vfile_name_coding_system is nil. */
171 Lisp_Object Vdefault_file_name_coding_system
;
173 /* Alist of elements (REGEXP . HANDLER) for file names
174 whose I/O is done with a special handler. */
175 Lisp_Object Vfile_name_handler_alist
;
177 /* Lisp functions for translating file formats */
178 Lisp_Object Qformat_decode
, Qformat_annotate_function
;
180 /* Function to be called to decide a coding system of a reading file. */
181 Lisp_Object Vset_auto_coding_function
;
183 /* Functions to be called to process text properties in inserted file. */
184 Lisp_Object Vafter_insert_file_functions
;
186 /* Lisp function for setting buffer-file-coding-system and the
187 multibyteness of the current buffer after inserting a file. */
188 Lisp_Object Qafter_insert_file_set_coding
;
190 /* Functions to be called to create text property annotations for file. */
191 Lisp_Object Vwrite_region_annotate_functions
;
192 Lisp_Object Qwrite_region_annotate_functions
;
194 /* During build_annotations, each time an annotation function is called,
195 this holds the annotations made by the previous functions. */
196 Lisp_Object Vwrite_region_annotations_so_far
;
198 /* File name in which we write a list of all our auto save files. */
199 Lisp_Object Vauto_save_list_file_name
;
201 /* Function to call to read a file name. */
202 Lisp_Object Vread_file_name_function
;
204 /* Current predicate used by read_file_name_internal. */
205 Lisp_Object Vread_file_name_predicate
;
207 /* Nonzero means completion ignores case when reading file name. */
208 int read_file_name_completion_ignore_case
;
210 /* Nonzero means, when reading a filename in the minibuffer,
211 start out by inserting the default directory into the minibuffer. */
212 int insert_default_directory
;
214 /* On VMS, nonzero means write new files with record format stmlf.
215 Zero means use var format. */
218 /* On NT, specifies the directory separator character, used (eg.) when
219 expanding file names. This can be bound to / or \. */
220 Lisp_Object Vdirectory_sep_char
;
222 extern Lisp_Object Vuser_login_name
;
225 extern Lisp_Object Vw32_get_true_file_attributes
;
228 extern int minibuf_level
;
230 extern int minibuffer_auto_raise
;
232 /* These variables describe handlers that have "already" had a chance
233 to handle the current operation.
235 Vinhibit_file_name_handlers is a list of file name handlers.
236 Vinhibit_file_name_operation is the operation being handled.
237 If we try to handle that operation, we ignore those handlers. */
239 static Lisp_Object Vinhibit_file_name_handlers
;
240 static Lisp_Object Vinhibit_file_name_operation
;
242 Lisp_Object Qfile_error
, Qfile_already_exists
, Qfile_date_error
;
244 Lisp_Object Qfile_name_history
;
246 Lisp_Object Qcar_less_than_car
;
248 static int a_write
P_ ((int, Lisp_Object
, int, int,
249 Lisp_Object
*, struct coding_system
*));
250 static int e_write
P_ ((int, Lisp_Object
, int, int, struct coding_system
*));
254 report_file_error (string
, data
)
258 Lisp_Object errstring
;
261 synchronize_system_messages_locale ();
262 errstring
= code_convert_string_norecord (build_string (strerror (errorno
)),
263 Vlocale_coding_system
, 0);
269 Fsignal (Qfile_already_exists
, Fcons (errstring
, data
));
272 /* System error messages are capitalized. Downcase the initial
273 unless it is followed by a slash. */
274 if (SREF (errstring
, 1) != '/')
275 SSET (errstring
, 0, DOWNCASE (SREF (errstring
, 0)));
277 Fsignal (Qfile_error
,
278 Fcons (build_string (string
), Fcons (errstring
, data
)));
283 close_file_unwind (fd
)
286 emacs_close (XFASTINT (fd
));
290 /* Restore point, having saved it as a marker. */
293 restore_point_unwind (location
)
294 Lisp_Object location
;
296 Fgoto_char (location
);
297 Fset_marker (location
, Qnil
, Qnil
);
301 Lisp_Object Qexpand_file_name
;
302 Lisp_Object Qsubstitute_in_file_name
;
303 Lisp_Object Qdirectory_file_name
;
304 Lisp_Object Qfile_name_directory
;
305 Lisp_Object Qfile_name_nondirectory
;
306 Lisp_Object Qunhandled_file_name_directory
;
307 Lisp_Object Qfile_name_as_directory
;
308 Lisp_Object Qcopy_file
;
309 Lisp_Object Qmake_directory_internal
;
310 Lisp_Object Qmake_directory
;
311 Lisp_Object Qdelete_directory
;
312 Lisp_Object Qdelete_file
;
313 Lisp_Object Qrename_file
;
314 Lisp_Object Qadd_name_to_file
;
315 Lisp_Object Qmake_symbolic_link
;
316 Lisp_Object Qfile_exists_p
;
317 Lisp_Object Qfile_executable_p
;
318 Lisp_Object Qfile_readable_p
;
319 Lisp_Object Qfile_writable_p
;
320 Lisp_Object Qfile_symlink_p
;
321 Lisp_Object Qaccess_file
;
322 Lisp_Object Qfile_directory_p
;
323 Lisp_Object Qfile_regular_p
;
324 Lisp_Object Qfile_accessible_directory_p
;
325 Lisp_Object Qfile_modes
;
326 Lisp_Object Qset_file_modes
;
327 Lisp_Object Qset_file_times
;
328 Lisp_Object Qfile_newer_than_file_p
;
329 Lisp_Object Qinsert_file_contents
;
330 Lisp_Object Qwrite_region
;
331 Lisp_Object Qverify_visited_file_modtime
;
332 Lisp_Object Qset_visited_file_modtime
;
334 DEFUN ("find-file-name-handler", Ffind_file_name_handler
, Sfind_file_name_handler
, 2, 2, 0,
335 doc
: /* Return FILENAME's handler function for OPERATION, if it has one.
336 Otherwise, return nil.
337 A file name is handled if one of the regular expressions in
338 `file-name-handler-alist' matches it.
340 If OPERATION equals `inhibit-file-name-operation', then we ignore
341 any handlers that are members of `inhibit-file-name-handlers',
342 but we still do run any other handlers. This lets handlers
343 use the standard functions without calling themselves recursively. */)
344 (filename
, operation
)
345 Lisp_Object filename
, operation
;
347 /* This function must not munge the match data. */
348 Lisp_Object chain
, inhibited_handlers
, result
;
352 CHECK_STRING (filename
);
354 if (EQ (operation
, Vinhibit_file_name_operation
))
355 inhibited_handlers
= Vinhibit_file_name_handlers
;
357 inhibited_handlers
= Qnil
;
359 for (chain
= Vfile_name_handler_alist
; CONSP (chain
);
360 chain
= XCDR (chain
))
370 && (match_pos
= fast_string_match (string
, filename
)) > pos
)
372 Lisp_Object handler
, tem
;
374 handler
= XCDR (elt
);
375 tem
= Fmemq (handler
, inhibited_handlers
);
389 DEFUN ("file-name-directory", Ffile_name_directory
, Sfile_name_directory
,
391 doc
: /* Return the directory component in file name FILENAME.
392 Return nil if FILENAME does not include a directory.
393 Otherwise return a directory spec.
394 Given a Unix syntax file name, returns a string ending in slash;
395 on VMS, perhaps instead a string ending in `:', `]' or `>'. */)
397 Lisp_Object filename
;
400 register const unsigned char *beg
;
402 register unsigned char *beg
;
404 register const unsigned char *p
;
407 CHECK_STRING (filename
);
409 /* If the file name has special constructs in it,
410 call the corresponding file handler. */
411 handler
= Ffind_file_name_handler (filename
, Qfile_name_directory
);
413 return call2 (handler
, Qfile_name_directory
, filename
);
415 #ifdef FILE_SYSTEM_CASE
416 filename
= FILE_SYSTEM_CASE (filename
);
418 beg
= SDATA (filename
);
420 beg
= strcpy (alloca (strlen (beg
) + 1), beg
);
422 p
= beg
+ SBYTES (filename
);
424 while (p
!= beg
&& !IS_DIRECTORY_SEP (p
[-1])
426 && p
[-1] != ':' && p
[-1] != ']' && p
[-1] != '>'
429 /* only recognise drive specifier at the beginning */
431 /* handle the "/:d:foo" and "/:foo" cases correctly */
432 && ((p
== beg
+ 2 && !IS_DIRECTORY_SEP (*beg
))
433 || (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
))))
440 /* Expansion of "c:" to drive and default directory. */
443 /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */
444 unsigned char *res
= alloca (MAXPATHLEN
+ 1);
445 unsigned char *r
= res
;
447 if (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
) && beg
[1] == ':')
449 strncpy (res
, beg
, 2);
454 if (getdefdir (toupper (*beg
) - 'A' + 1, r
))
456 if (!IS_DIRECTORY_SEP (res
[strlen (res
) - 1]))
459 p
= beg
+ strlen (beg
);
462 CORRECT_DIR_SEPS (beg
);
465 return make_specified_string (beg
, -1, p
- beg
, STRING_MULTIBYTE (filename
));
468 DEFUN ("file-name-nondirectory", Ffile_name_nondirectory
,
469 Sfile_name_nondirectory
, 1, 1, 0,
470 doc
: /* Return file name FILENAME sans its directory.
471 For example, in a Unix-syntax file name,
472 this is everything after the last slash,
473 or the entire name if it contains no slash. */)
475 Lisp_Object filename
;
477 register const unsigned char *beg
, *p
, *end
;
480 CHECK_STRING (filename
);
482 /* If the file name has special constructs in it,
483 call the corresponding file handler. */
484 handler
= Ffind_file_name_handler (filename
, Qfile_name_nondirectory
);
486 return call2 (handler
, Qfile_name_nondirectory
, filename
);
488 beg
= SDATA (filename
);
489 end
= p
= beg
+ SBYTES (filename
);
491 while (p
!= beg
&& !IS_DIRECTORY_SEP (p
[-1])
493 && p
[-1] != ':' && p
[-1] != ']' && p
[-1] != '>'
496 /* only recognise drive specifier at beginning */
498 /* handle the "/:d:foo" case correctly */
499 && (p
== beg
+ 2 || (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
))))
504 return make_specified_string (p
, -1, end
- p
, STRING_MULTIBYTE (filename
));
507 DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory
,
508 Sunhandled_file_name_directory
, 1, 1, 0,
509 doc
: /* Return a directly usable directory name somehow associated with FILENAME.
510 A `directly usable' directory name is one that may be used without the
511 intervention of any file handler.
512 If FILENAME is a directly usable file itself, return
513 \(file-name-directory FILENAME).
514 The `call-process' and `start-process' functions use this function to
515 get a current directory to run processes in. */)
517 Lisp_Object filename
;
521 /* If the file name has special constructs in it,
522 call the corresponding file handler. */
523 handler
= Ffind_file_name_handler (filename
, Qunhandled_file_name_directory
);
525 return call2 (handler
, Qunhandled_file_name_directory
, filename
);
527 return Ffile_name_directory (filename
);
532 file_name_as_directory (out
, in
)
535 int size
= strlen (in
) - 1;
548 /* Is it already a directory string? */
549 if (in
[size
] == ':' || in
[size
] == ']' || in
[size
] == '>')
551 /* Is it a VMS directory file name? If so, hack VMS syntax. */
552 else if (! index (in
, '/')
553 && ((size
> 3 && ! strcmp (&in
[size
- 3], ".DIR"))
554 || (size
> 3 && ! strcmp (&in
[size
- 3], ".dir"))
555 || (size
> 5 && (! strncmp (&in
[size
- 5], ".DIR", 4)
556 || ! strncmp (&in
[size
- 5], ".dir", 4))
557 && (in
[size
- 1] == '.' || in
[size
- 1] == ';')
558 && in
[size
] == '1')))
560 register char *p
, *dot
;
564 dir:x.dir --> dir:[x]
565 dir:[x]y.dir --> dir:[x.y] */
567 while (p
!= in
&& *p
!= ':' && *p
!= '>' && *p
!= ']') p
--;
570 strncpy (out
, in
, p
- in
);
589 dot
= index (p
, '.');
592 /* blindly remove any extension */
593 size
= strlen (out
) + (dot
- p
);
594 strncat (out
, p
, dot
- p
);
605 /* For Unix syntax, Append a slash if necessary */
606 if (!IS_DIRECTORY_SEP (out
[size
]))
608 /* Cannot use DIRECTORY_SEP, which could have any value */
610 out
[size
+ 2] = '\0';
613 CORRECT_DIR_SEPS (out
);
619 DEFUN ("file-name-as-directory", Ffile_name_as_directory
,
620 Sfile_name_as_directory
, 1, 1, 0,
621 doc
: /* Return a string representing the file name FILE interpreted as a directory.
622 This operation exists because a directory is also a file, but its name as
623 a directory is different from its name as a file.
624 The result can be used as the value of `default-directory'
625 or passed as second argument to `expand-file-name'.
626 For a Unix-syntax file name, just appends a slash.
627 On VMS, converts \"[X]FOO.DIR\" to \"[X.FOO]\", etc. */)
638 /* If the file name has special constructs in it,
639 call the corresponding file handler. */
640 handler
= Ffind_file_name_handler (file
, Qfile_name_as_directory
);
642 return call2 (handler
, Qfile_name_as_directory
, file
);
644 buf
= (char *) alloca (SBYTES (file
) + 10);
645 file_name_as_directory (buf
, SDATA (file
));
646 return make_specified_string (buf
, -1, strlen (buf
),
647 STRING_MULTIBYTE (file
));
651 * Convert from directory name to filename.
653 * xyzzy:[mukesh.emacs] => xyzzy:[mukesh]emacs.dir.1
654 * xyzzy:[mukesh] => xyzzy:[000000]mukesh.dir.1
655 * On UNIX, it's simple: just make sure there isn't a terminating /
657 * Value is nonzero if the string output is different from the input.
661 directory_file_name (src
, dst
)
669 struct FAB fab
= cc$rms_fab
;
670 struct NAM nam
= cc$rms_nam
;
671 char esa
[NAM$C_MAXRSS
];
676 if (! index (src
, '/')
677 && (src
[slen
- 1] == ']'
678 || src
[slen
- 1] == ':'
679 || src
[slen
- 1] == '>'))
681 /* VMS style - convert [x.y.z] to [x.y]z, [x] to [000000]x */
683 fab
.fab$b_fns
= slen
;
684 fab
.fab$l_nam
= &nam
;
685 fab
.fab$l_fop
= FAB$M_NAM
;
688 nam
.nam$b_ess
= sizeof esa
;
689 nam
.nam$b_nop
|= NAM$M_SYNCHK
;
691 /* We call SYS$PARSE to handle such things as [--] for us. */
692 if (SYS$
PARSE (&fab
, 0, 0) == RMS$_NORMAL
)
694 slen
= nam
.nam$b_esl
;
695 if (esa
[slen
- 1] == ';' && esa
[slen
- 2] == '.')
700 if (src
[slen
- 1] != ']' && src
[slen
- 1] != '>')
702 /* what about when we have logical_name:???? */
703 if (src
[slen
- 1] == ':')
704 { /* Xlate logical name and see what we get */
705 ptr
= strcpy (dst
, src
); /* upper case for getenv */
708 if ('a' <= *ptr
&& *ptr
<= 'z')
712 dst
[slen
- 1] = 0; /* remove colon */
713 if (!(src
= egetenv (dst
)))
715 /* should we jump to the beginning of this procedure?
716 Good points: allows us to use logical names that xlate
718 Bad points: can be a problem if we just translated to a device
720 For now, I'll punt and always expect VMS names, and hope for
723 if (src
[slen
- 1] != ']' && src
[slen
- 1] != '>')
724 { /* no recursion here! */
730 { /* not a directory spec */
735 bracket
= src
[slen
- 1];
737 /* If bracket is ']' or '>', bracket - 2 is the corresponding
739 ptr
= index (src
, bracket
- 2);
741 { /* no opening bracket */
745 if (!(rptr
= rindex (src
, '.')))
748 strncpy (dst
, src
, slen
);
752 dst
[slen
++] = bracket
;
757 /* If we have the top-level of a rooted directory (i.e. xx:[000000]),
758 then translate the device and recurse. */
759 if (dst
[slen
- 1] == ':'
760 && dst
[slen
- 2] != ':' /* skip decnet nodes */
761 && strcmp (src
+ slen
, "[000000]") == 0)
763 dst
[slen
- 1] = '\0';
764 if ((ptr
= egetenv (dst
))
765 && (rlen
= strlen (ptr
) - 1) > 0
766 && (ptr
[rlen
] == ']' || ptr
[rlen
] == '>')
767 && ptr
[rlen
- 1] == '.')
769 char * buf
= (char *) alloca (strlen (ptr
) + 1);
773 return directory_file_name (buf
, dst
);
778 strcat (dst
, "[000000]");
782 rlen
= strlen (rptr
) - 1;
783 strncat (dst
, rptr
, rlen
);
784 dst
[slen
+ rlen
] = '\0';
785 strcat (dst
, ".DIR.1");
789 /* Process as Unix format: just remove any final slash.
790 But leave "/" unchanged; do not change it to "". */
793 /* Handle // as root for apollo's. */
794 if ((slen
> 2 && dst
[slen
- 1] == '/')
795 || (slen
> 1 && dst
[0] != '/' && dst
[slen
- 1] == '/'))
799 && IS_DIRECTORY_SEP (dst
[slen
- 1])
801 && !IS_ANY_SEP (dst
[slen
- 2])
807 CORRECT_DIR_SEPS (dst
);
812 DEFUN ("directory-file-name", Fdirectory_file_name
, Sdirectory_file_name
,
814 doc
: /* Returns the file name of the directory named DIRECTORY.
815 This is the name of the file that holds the data for the directory DIRECTORY.
816 This operation exists because a directory is also a file, but its name as
817 a directory is different from its name as a file.
818 In Unix-syntax, this function just removes the final slash.
819 On VMS, given a VMS-syntax directory name such as \"[X.Y]\",
820 it returns a file name such as \"[X]Y.DIR.1\". */)
822 Lisp_Object directory
;
827 CHECK_STRING (directory
);
829 if (NILP (directory
))
832 /* If the file name has special constructs in it,
833 call the corresponding file handler. */
834 handler
= Ffind_file_name_handler (directory
, Qdirectory_file_name
);
836 return call2 (handler
, Qdirectory_file_name
, directory
);
839 /* 20 extra chars is insufficient for VMS, since we might perform a
840 logical name translation. an equivalence string can be up to 255
841 chars long, so grab that much extra space... - sss */
842 buf
= (char *) alloca (SBYTES (directory
) + 20 + 255);
844 buf
= (char *) alloca (SBYTES (directory
) + 20);
846 directory_file_name (SDATA (directory
), buf
);
847 return make_specified_string (buf
, -1, strlen (buf
),
848 STRING_MULTIBYTE (directory
));
851 static char make_temp_name_tbl
[64] =
853 'A','B','C','D','E','F','G','H',
854 'I','J','K','L','M','N','O','P',
855 'Q','R','S','T','U','V','W','X',
856 'Y','Z','a','b','c','d','e','f',
857 'g','h','i','j','k','l','m','n',
858 'o','p','q','r','s','t','u','v',
859 'w','x','y','z','0','1','2','3',
860 '4','5','6','7','8','9','-','_'
863 static unsigned make_temp_name_count
, make_temp_name_count_initialized_p
;
865 /* Value is a temporary file name starting with PREFIX, a string.
867 The Emacs process number forms part of the result, so there is
868 no danger of generating a name being used by another process.
869 In addition, this function makes an attempt to choose a name
870 which has no existing file. To make this work, PREFIX should be
871 an absolute file name.
873 BASE64_P non-zero means add the pid as 3 characters in base64
874 encoding. In this case, 6 characters will be added to PREFIX to
875 form the file name. Otherwise, if Emacs is running on a system
876 with long file names, add the pid as a decimal number.
878 This function signals an error if no unique file name could be
882 make_temp_name (prefix
, base64_p
)
889 unsigned char *p
, *data
;
893 CHECK_STRING (prefix
);
895 /* VAL is created by adding 6 characters to PREFIX. The first
896 three are the PID of this process, in base 64, and the second
897 three are incremented if the file already exists. This ensures
898 262144 unique file names per PID per PREFIX. */
900 pid
= (int) getpid ();
904 pidbuf
[0] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
905 pidbuf
[1] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
906 pidbuf
[2] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
911 #ifdef HAVE_LONG_FILE_NAMES
912 sprintf (pidbuf
, "%d", pid
);
913 pidlen
= strlen (pidbuf
);
915 pidbuf
[0] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
916 pidbuf
[1] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
917 pidbuf
[2] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
922 len
= SBYTES (prefix
); clen
= SCHARS (prefix
);
923 val
= make_uninit_multibyte_string (clen
+ 3 + pidlen
, len
+ 3 + pidlen
);
924 if (!STRING_MULTIBYTE (prefix
))
925 STRING_SET_UNIBYTE (val
);
927 bcopy(SDATA (prefix
), data
, len
);
930 bcopy (pidbuf
, p
, pidlen
);
933 /* Here we try to minimize useless stat'ing when this function is
934 invoked many times successively with the same PREFIX. We achieve
935 this by initializing count to a random value, and incrementing it
938 We don't want make-temp-name to be called while dumping,
939 because then make_temp_name_count_initialized_p would get set
940 and then make_temp_name_count would not be set when Emacs starts. */
942 if (!make_temp_name_count_initialized_p
)
944 make_temp_name_count
= (unsigned) time (NULL
);
945 make_temp_name_count_initialized_p
= 1;
951 unsigned num
= make_temp_name_count
;
953 p
[0] = make_temp_name_tbl
[num
& 63], num
>>= 6;
954 p
[1] = make_temp_name_tbl
[num
& 63], num
>>= 6;
955 p
[2] = make_temp_name_tbl
[num
& 63], num
>>= 6;
957 /* Poor man's congruential RN generator. Replace with
958 ++make_temp_name_count for debugging. */
959 make_temp_name_count
+= 25229;
960 make_temp_name_count
%= 225307;
962 if (stat (data
, &ignored
) < 0)
964 /* We want to return only if errno is ENOENT. */
968 /* The error here is dubious, but there is little else we
969 can do. The alternatives are to return nil, which is
970 as bad as (and in many cases worse than) throwing the
971 error, or to ignore the error, which will likely result
972 in looping through 225307 stat's, which is not only
973 dog-slow, but also useless since it will fallback to
974 the errow below, anyway. */
975 report_file_error ("Cannot create temporary name for prefix",
976 Fcons (prefix
, Qnil
));
981 error ("Cannot create temporary name for prefix `%s'",
987 DEFUN ("make-temp-name", Fmake_temp_name
, Smake_temp_name
, 1, 1, 0,
988 doc
: /* Generate temporary file name (string) starting with PREFIX (a string).
989 The Emacs process number forms part of the result,
990 so there is no danger of generating a name being used by another process.
992 In addition, this function makes an attempt to choose a name
993 which has no existing file. To make this work,
994 PREFIX should be an absolute file name.
996 There is a race condition between calling `make-temp-name' and creating the
997 file which opens all kinds of security holes. For that reason, you should
998 probably use `make-temp-file' instead, except in three circumstances:
1000 * If you are creating the file in the user's home directory.
1001 * If you are creating a directory rather than an ordinary file.
1002 * If you are taking special precautions as `make-temp-file' does. */)
1006 return make_temp_name (prefix
, 0);
1011 DEFUN ("expand-file-name", Fexpand_file_name
, Sexpand_file_name
, 1, 2, 0,
1012 doc
: /* Convert filename NAME to absolute, and canonicalize it.
1013 Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative
1014 (does not start with slash); if DEFAULT-DIRECTORY is nil or missing,
1015 the current buffer's value of default-directory is used.
1016 File name components that are `.' are removed, and
1017 so are file name components followed by `..', along with the `..' itself;
1018 note that these simplifications are done without checking the resulting
1019 file names in the file system.
1020 An initial `~/' expands to your home directory.
1021 An initial `~USER/' expands to USER's home directory.
1022 See also the function `substitute-in-file-name'. */)
1023 (name
, default_directory
)
1024 Lisp_Object name
, default_directory
;
1028 register unsigned char *newdir
, *p
, *o
;
1030 unsigned char *target
;
1033 unsigned char * colon
= 0;
1034 unsigned char * close
= 0;
1035 unsigned char * slash
= 0;
1036 unsigned char * brack
= 0;
1037 int lbrack
= 0, rbrack
= 0;
1042 int collapse_newdir
= 1;
1046 Lisp_Object handler
, result
;
1048 CHECK_STRING (name
);
1050 /* If the file name has special constructs in it,
1051 call the corresponding file handler. */
1052 handler
= Ffind_file_name_handler (name
, Qexpand_file_name
);
1053 if (!NILP (handler
))
1054 return call3 (handler
, Qexpand_file_name
, name
, default_directory
);
1056 /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */
1057 if (NILP (default_directory
))
1058 default_directory
= current_buffer
->directory
;
1059 if (! STRINGP (default_directory
))
1062 /* "/" is not considered a root directory on DOS_NT, so using "/"
1063 here causes an infinite recursion in, e.g., the following:
1065 (let (default-directory)
1066 (expand-file-name "a"))
1068 To avoid this, we set default_directory to the root of the
1070 extern char *emacs_root_dir (void);
1072 default_directory
= build_string (emacs_root_dir ());
1074 default_directory
= build_string ("/");
1078 if (!NILP (default_directory
))
1080 handler
= Ffind_file_name_handler (default_directory
, Qexpand_file_name
);
1081 if (!NILP (handler
))
1082 return call3 (handler
, Qexpand_file_name
, name
, default_directory
);
1085 o
= SDATA (default_directory
);
1087 /* Make sure DEFAULT_DIRECTORY is properly expanded.
1088 It would be better to do this down below where we actually use
1089 default_directory. Unfortunately, calling Fexpand_file_name recursively
1090 could invoke GC, and the strings might be relocated. This would
1091 be annoying because we have pointers into strings lying around
1092 that would need adjusting, and people would add new pointers to
1093 the code and forget to adjust them, resulting in intermittent bugs.
1094 Putting this call here avoids all that crud.
1096 The EQ test avoids infinite recursion. */
1097 if (! NILP (default_directory
) && !EQ (default_directory
, name
)
1098 /* Save time in some common cases - as long as default_directory
1099 is not relative, it can be canonicalized with name below (if it
1100 is needed at all) without requiring it to be expanded now. */
1102 /* Detect MSDOS file names with drive specifiers. */
1103 && ! (IS_DRIVE (o
[0]) && IS_DEVICE_SEP (o
[1]) && IS_DIRECTORY_SEP (o
[2]))
1105 /* Detect Windows file names in UNC format. */
1106 && ! (IS_DIRECTORY_SEP (o
[0]) && IS_DIRECTORY_SEP (o
[1]))
1108 #else /* not DOS_NT */
1109 /* Detect Unix absolute file names (/... alone is not absolute on
1111 && ! (IS_DIRECTORY_SEP (o
[0]))
1112 #endif /* not DOS_NT */
1115 struct gcpro gcpro1
;
1118 default_directory
= Fexpand_file_name (default_directory
, Qnil
);
1123 /* Filenames on VMS are always upper case. */
1124 name
= Fupcase (name
);
1126 #ifdef FILE_SYSTEM_CASE
1127 name
= FILE_SYSTEM_CASE (name
);
1133 /* We will force directory separators to be either all \ or /, so make
1134 a local copy to modify, even if there ends up being no change. */
1135 nm
= strcpy (alloca (strlen (nm
) + 1), nm
);
1137 /* Note if special escape prefix is present, but remove for now. */
1138 if (nm
[0] == '/' && nm
[1] == ':')
1144 /* Find and remove drive specifier if present; this makes nm absolute
1145 even if the rest of the name appears to be relative. Only look for
1146 drive specifier at the beginning. */
1147 if (IS_DRIVE (nm
[0]) && IS_DEVICE_SEP (nm
[1]))
1154 /* If we see "c://somedir", we want to strip the first slash after the
1155 colon when stripping the drive letter. Otherwise, this expands to
1157 if (drive
&& IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1159 #endif /* WINDOWSNT */
1163 /* Discard any previous drive specifier if nm is now in UNC format. */
1164 if (IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1170 /* If nm is absolute, look for `/./' or `/../' or `//''sequences; if
1171 none are found, we can probably return right away. We will avoid
1172 allocating a new string if name is already fully expanded. */
1174 IS_DIRECTORY_SEP (nm
[0])
1176 && drive
&& !is_escaped
1179 && (drive
|| IS_DIRECTORY_SEP (nm
[1])) && !is_escaped
1186 /* If it turns out that the filename we want to return is just a
1187 suffix of FILENAME, we don't need to go through and edit
1188 things; we just need to construct a new string using data
1189 starting at the middle of FILENAME. If we set lose to a
1190 non-zero value, that means we've discovered that we can't do
1197 /* Since we know the name is absolute, we can assume that each
1198 element starts with a "/". */
1200 /* "." and ".." are hairy. */
1201 if (IS_DIRECTORY_SEP (p
[0])
1203 && (IS_DIRECTORY_SEP (p
[2])
1205 || (p
[2] == '.' && (IS_DIRECTORY_SEP (p
[3])
1208 /* We want to replace multiple `/' in a row with a single
1211 && IS_DIRECTORY_SEP (p
[0])
1212 && IS_DIRECTORY_SEP (p
[1]))
1219 /* if dev:[dir]/, move nm to / */
1220 if (!slash
&& p
> nm
&& (brack
|| colon
)) {
1221 nm
= (brack
? brack
+ 1 : colon
+ 1);
1222 lbrack
= rbrack
= 0;
1230 /* VMS pre V4.4,convert '-'s in filenames. */
1231 if (lbrack
== rbrack
)
1233 if (dots
< 2) /* this is to allow negative version numbers */
1238 if (lbrack
> rbrack
&&
1239 ((p
[-1] == '.' || p
[-1] == '[' || p
[-1] == '<') &&
1240 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>')))
1246 /* count open brackets, reset close bracket pointer */
1247 if (p
[0] == '[' || p
[0] == '<')
1248 lbrack
++, brack
= 0;
1249 /* count close brackets, set close bracket pointer */
1250 if (p
[0] == ']' || p
[0] == '>')
1251 rbrack
++, brack
= p
;
1252 /* detect ][ or >< */
1253 if ((p
[0] == ']' || p
[0] == '>') && (p
[1] == '[' || p
[1] == '<'))
1255 if ((p
[0] == ':' || p
[0] == ']' || p
[0] == '>') && p
[1] == '~')
1256 nm
= p
+ 1, lose
= 1;
1257 if (p
[0] == ':' && (colon
|| slash
))
1258 /* if dev1:[dir]dev2:, move nm to dev2: */
1264 /* if /name/dev:, move nm to dev: */
1267 /* if node::dev:, move colon following dev */
1268 else if (colon
&& colon
[-1] == ':')
1270 /* if dev1:dev2:, move nm to dev2: */
1271 else if (colon
&& colon
[-1] != ':')
1276 if (p
[0] == ':' && !colon
)
1282 if (lbrack
== rbrack
)
1285 else if (p
[0] == '.')
1293 if (index (nm
, '/'))
1295 nm
= sys_translate_unix (nm
);
1296 return make_specified_string (nm
, -1, strlen (nm
),
1297 STRING_MULTIBYTE (name
));
1301 /* Make sure directories are all separated with / or \ as
1302 desired, but avoid allocation of a new string when not
1304 CORRECT_DIR_SEPS (nm
);
1306 if (IS_DIRECTORY_SEP (nm
[1]))
1308 if (strcmp (nm
, SDATA (name
)) != 0)
1309 name
= make_specified_string (nm
, -1, strlen (nm
),
1310 STRING_MULTIBYTE (name
));
1314 /* drive must be set, so this is okay */
1315 if (strcmp (nm
- 2, SDATA (name
)) != 0)
1319 name
= make_specified_string (nm
, -1, p
- nm
,
1320 STRING_MULTIBYTE (name
));
1321 temp
[0] = DRIVE_LETTER (drive
);
1322 name
= concat2 (build_string (temp
), name
);
1325 #else /* not DOS_NT */
1326 if (nm
== SDATA (name
))
1328 return make_specified_string (nm
, -1, strlen (nm
),
1329 STRING_MULTIBYTE (name
));
1330 #endif /* not DOS_NT */
1334 /* At this point, nm might or might not be an absolute file name. We
1335 need to expand ~ or ~user if present, otherwise prefix nm with
1336 default_directory if nm is not absolute, and finally collapse /./
1337 and /foo/../ sequences.
1339 We set newdir to be the appropriate prefix if one is needed:
1340 - the relevant user directory if nm starts with ~ or ~user
1341 - the specified drive's working dir (DOS/NT only) if nm does not
1343 - the value of default_directory.
1345 Note that these prefixes are not guaranteed to be absolute (except
1346 for the working dir of a drive). Therefore, to ensure we always
1347 return an absolute name, if the final prefix is not absolute we
1348 append it to the current working directory. */
1352 if (nm
[0] == '~') /* prefix ~ */
1354 if (IS_DIRECTORY_SEP (nm
[1])
1358 || nm
[1] == 0) /* ~ by itself */
1360 if (!(newdir
= (unsigned char *) egetenv ("HOME")))
1361 newdir
= (unsigned char *) "";
1364 collapse_newdir
= 0;
1367 nm
++; /* Don't leave the slash in nm. */
1370 else /* ~user/filename */
1372 for (p
= nm
; *p
&& (!IS_DIRECTORY_SEP (*p
)
1377 o
= (unsigned char *) alloca (p
- nm
+ 1);
1378 bcopy ((char *) nm
, o
, p
- nm
);
1381 pw
= (struct passwd
*) getpwnam (o
+ 1);
1384 newdir
= (unsigned char *) pw
-> pw_dir
;
1386 nm
= p
+ 1; /* skip the terminator */
1390 collapse_newdir
= 0;
1395 /* If we don't find a user of that name, leave the name
1396 unchanged; don't move nm forward to p. */
1401 /* On DOS and Windows, nm is absolute if a drive name was specified;
1402 use the drive's current directory as the prefix if needed. */
1403 if (!newdir
&& drive
)
1405 /* Get default directory if needed to make nm absolute. */
1406 if (!IS_DIRECTORY_SEP (nm
[0]))
1408 newdir
= alloca (MAXPATHLEN
+ 1);
1409 if (!getdefdir (toupper (drive
) - 'A' + 1, newdir
))
1414 /* Either nm starts with /, or drive isn't mounted. */
1415 newdir
= alloca (4);
1416 newdir
[0] = DRIVE_LETTER (drive
);
1424 /* Finally, if no prefix has been specified and nm is not absolute,
1425 then it must be expanded relative to default_directory. */
1429 /* /... alone is not absolute on DOS and Windows. */
1430 && !IS_DIRECTORY_SEP (nm
[0])
1433 && !(IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1440 newdir
= SDATA (default_directory
);
1442 /* Note if special escape prefix is present, but remove for now. */
1443 if (newdir
[0] == '/' && newdir
[1] == ':')
1454 /* First ensure newdir is an absolute name. */
1456 /* Detect MSDOS file names with drive specifiers. */
1457 ! (IS_DRIVE (newdir
[0])
1458 && IS_DEVICE_SEP (newdir
[1]) && IS_DIRECTORY_SEP (newdir
[2]))
1460 /* Detect Windows file names in UNC format. */
1461 && ! (IS_DIRECTORY_SEP (newdir
[0]) && IS_DIRECTORY_SEP (newdir
[1]))
1465 /* Effectively, let newdir be (expand-file-name newdir cwd).
1466 Because of the admonition against calling expand-file-name
1467 when we have pointers into lisp strings, we accomplish this
1468 indirectly by prepending newdir to nm if necessary, and using
1469 cwd (or the wd of newdir's drive) as the new newdir. */
1471 if (IS_DRIVE (newdir
[0]) && newdir
[1] == ':')
1476 if (!IS_DIRECTORY_SEP (nm
[0]))
1478 char * tmp
= alloca (strlen (newdir
) + strlen (nm
) + 2);
1479 file_name_as_directory (tmp
, newdir
);
1483 newdir
= alloca (MAXPATHLEN
+ 1);
1486 if (!getdefdir (toupper (drive
) - 'A' + 1, newdir
))
1493 /* Strip off drive name from prefix, if present. */
1494 if (IS_DRIVE (newdir
[0]) && newdir
[1] == ':')
1500 /* Keep only a prefix from newdir if nm starts with slash
1501 (//server/share for UNC, nothing otherwise). */
1502 if (IS_DIRECTORY_SEP (nm
[0]) && collapse_newdir
)
1505 if (IS_DIRECTORY_SEP (newdir
[0]) && IS_DIRECTORY_SEP (newdir
[1]))
1507 newdir
= strcpy (alloca (strlen (newdir
) + 1), newdir
);
1509 while (*p
&& !IS_DIRECTORY_SEP (*p
)) p
++;
1511 while (*p
&& !IS_DIRECTORY_SEP (*p
)) p
++;
1523 /* Get rid of any slash at the end of newdir, unless newdir is
1524 just / or // (an incomplete UNC name). */
1525 length
= strlen (newdir
);
1526 if (length
> 1 && IS_DIRECTORY_SEP (newdir
[length
- 1])
1528 && !(length
== 2 && IS_DIRECTORY_SEP (newdir
[0]))
1532 unsigned char *temp
= (unsigned char *) alloca (length
);
1533 bcopy (newdir
, temp
, length
- 1);
1534 temp
[length
- 1] = 0;
1542 /* Now concatenate the directory and name to new space in the stack frame */
1543 tlen
+= strlen (nm
) + 1;
1545 /* Reserve space for drive specifier and escape prefix, since either
1546 or both may need to be inserted. (The Microsoft x86 compiler
1547 produces incorrect code if the following two lines are combined.) */
1548 target
= (unsigned char *) alloca (tlen
+ 4);
1550 #else /* not DOS_NT */
1551 target
= (unsigned char *) alloca (tlen
);
1552 #endif /* not DOS_NT */
1558 if (nm
[0] == 0 || IS_DIRECTORY_SEP (nm
[0]))
1561 /* If newdir is effectively "C:/", then the drive letter will have
1562 been stripped and newdir will be "/". Concatenating with an
1563 absolute directory in nm produces "//", which will then be
1564 incorrectly treated as a network share. Ignore newdir in
1565 this case (keeping the drive letter). */
1566 if (!(drive
&& nm
[0] && IS_DIRECTORY_SEP (newdir
[0])
1567 && newdir
[1] == '\0'))
1569 strcpy (target
, newdir
);
1573 file_name_as_directory (target
, newdir
);
1576 strcat (target
, nm
);
1578 if (index (target
, '/'))
1579 strcpy (target
, sys_translate_unix (target
));
1582 /* ASSERT (IS_DIRECTORY_SEP (target[0])) if not VMS */
1584 /* Now canonicalize by removing `//', `/.' and `/foo/..' if they
1593 if (*p
!= ']' && *p
!= '>' && *p
!= '-')
1599 else if ((p
[0] == ']' || p
[0] == '>') && p
[0] == p
[1] + 2)
1600 /* brackets are offset from each other by 2 */
1603 if (*p
!= '.' && *p
!= '-' && o
[-1] != '.')
1604 /* convert [foo][bar] to [bar] */
1605 while (o
[-1] != '[' && o
[-1] != '<')
1607 else if (*p
== '-' && *o
!= '.')
1610 else if (p
[0] == '-' && o
[-1] == '.' &&
1611 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>'))
1612 /* flush .foo.- ; leave - if stopped by '[' or '<' */
1616 while (o
[-1] != '.' && o
[-1] != '[' && o
[-1] != '<');
1617 if (p
[1] == '.') /* foo.-.bar ==> bar. */
1619 else if (o
[-1] == '.') /* '.foo.-]' ==> ']' */
1621 /* else [foo.-] ==> [-] */
1627 o
[-1] != '[' && o
[-1] != '<' && o
[-1] != '.' &&
1628 p
[1] != ']' && p
[1] != '>' && p
[1] != '.')
1634 if (!IS_DIRECTORY_SEP (*p
))
1638 else if (IS_DIRECTORY_SEP (p
[0])
1640 && (IS_DIRECTORY_SEP (p
[2])
1643 /* If "/." is the entire filename, keep the "/". Otherwise,
1644 just delete the whole "/.". */
1645 if (o
== target
&& p
[2] == '\0')
1649 else if (IS_DIRECTORY_SEP (p
[0]) && p
[1] == '.' && p
[2] == '.'
1650 /* `/../' is the "superroot" on certain file systems. */
1652 && (IS_DIRECTORY_SEP (p
[3]) || p
[3] == 0))
1654 while (o
!= target
&& (--o
) && !IS_DIRECTORY_SEP (*o
))
1656 /* Keep initial / only if this is the whole name. */
1657 if (o
== target
&& IS_ANY_SEP (*o
) && p
[3] == 0)
1662 && IS_DIRECTORY_SEP (p
[0]) && IS_DIRECTORY_SEP (p
[1]))
1664 /* Collapse multiple `/' in a row. */
1666 while (IS_DIRECTORY_SEP (*p
))
1673 #endif /* not VMS */
1677 /* At last, set drive name. */
1679 /* Except for network file name. */
1680 if (!(IS_DIRECTORY_SEP (target
[0]) && IS_DIRECTORY_SEP (target
[1])))
1681 #endif /* WINDOWSNT */
1683 if (!drive
) abort ();
1685 target
[0] = DRIVE_LETTER (drive
);
1688 /* Reinsert the escape prefix if required. */
1695 CORRECT_DIR_SEPS (target
);
1698 result
= make_specified_string (target
, -1, o
- target
,
1699 STRING_MULTIBYTE (name
));
1701 /* Again look to see if the file name has special constructs in it
1702 and perhaps call the corresponding file handler. This is needed
1703 for filenames such as "/foo/../user@host:/bar/../baz". Expanding
1704 the ".." component gives us "/user@host:/bar/../baz" which needs
1705 to be expanded again. */
1706 handler
= Ffind_file_name_handler (result
, Qexpand_file_name
);
1707 if (!NILP (handler
))
1708 return call3 (handler
, Qexpand_file_name
, result
, default_directory
);
1714 /* PLEASE DO NOT DELETE THIS COMMENTED-OUT VERSION!
1715 This is the old version of expand-file-name, before it was thoroughly
1716 rewritten for Emacs 10.31. We leave this version here commented-out,
1717 because the code is very complex and likely to have subtle bugs. If
1718 bugs _are_ found, it might be of interest to look at the old code and
1719 see what did it do in the relevant situation.
1721 Don't remove this code: it's true that it will be accessible via CVS,
1722 but a few years from deletion, people will forget it is there. */
1724 /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */
1725 DEAFUN ("expand-file-name", Fexpand_file_name
, Sexpand_file_name
, 1, 2, 0,
1726 "Convert FILENAME to absolute, and canonicalize it.\n\
1727 Second arg DEFAULT is directory to start with if FILENAME is relative\n\
1728 (does not start with slash); if DEFAULT is nil or missing,\n\
1729 the current buffer's value of default-directory is used.\n\
1730 Filenames containing `.' or `..' as components are simplified;\n\
1731 initial `~/' expands to your home directory.\n\
1732 See also the function `substitute-in-file-name'.")
1734 Lisp_Object name
, defalt
;
1738 register unsigned char *newdir
, *p
, *o
;
1740 unsigned char *target
;
1744 unsigned char * colon
= 0;
1745 unsigned char * close
= 0;
1746 unsigned char * slash
= 0;
1747 unsigned char * brack
= 0;
1748 int lbrack
= 0, rbrack
= 0;
1752 CHECK_STRING (name
);
1755 /* Filenames on VMS are always upper case. */
1756 name
= Fupcase (name
);
1761 /* If nm is absolute, flush ...// and detect /./ and /../.
1762 If no /./ or /../ we can return right away. */
1774 if (p
[0] == '/' && p
[1] == '/'
1776 /* // at start of filename is meaningful on Apollo system. */
1781 if (p
[0] == '/' && p
[1] == '~')
1782 nm
= p
+ 1, lose
= 1;
1783 if (p
[0] == '/' && p
[1] == '.'
1784 && (p
[2] == '/' || p
[2] == 0
1785 || (p
[2] == '.' && (p
[3] == '/' || p
[3] == 0))))
1791 /* if dev:[dir]/, move nm to / */
1792 if (!slash
&& p
> nm
&& (brack
|| colon
)) {
1793 nm
= (brack
? brack
+ 1 : colon
+ 1);
1794 lbrack
= rbrack
= 0;
1802 /* VMS pre V4.4,convert '-'s in filenames. */
1803 if (lbrack
== rbrack
)
1805 if (dots
< 2) /* this is to allow negative version numbers */
1810 if (lbrack
> rbrack
&&
1811 ((p
[-1] == '.' || p
[-1] == '[' || p
[-1] == '<') &&
1812 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>')))
1818 /* count open brackets, reset close bracket pointer */
1819 if (p
[0] == '[' || p
[0] == '<')
1820 lbrack
++, brack
= 0;
1821 /* count close brackets, set close bracket pointer */
1822 if (p
[0] == ']' || p
[0] == '>')
1823 rbrack
++, brack
= p
;
1824 /* detect ][ or >< */
1825 if ((p
[0] == ']' || p
[0] == '>') && (p
[1] == '[' || p
[1] == '<'))
1827 if ((p
[0] == ':' || p
[0] == ']' || p
[0] == '>') && p
[1] == '~')
1828 nm
= p
+ 1, lose
= 1;
1829 if (p
[0] == ':' && (colon
|| slash
))
1830 /* if dev1:[dir]dev2:, move nm to dev2: */
1836 /* If /name/dev:, move nm to dev: */
1839 /* If node::dev:, move colon following dev */
1840 else if (colon
&& colon
[-1] == ':')
1842 /* If dev1:dev2:, move nm to dev2: */
1843 else if (colon
&& colon
[-1] != ':')
1848 if (p
[0] == ':' && !colon
)
1854 if (lbrack
== rbrack
)
1857 else if (p
[0] == '.')
1865 if (index (nm
, '/'))
1866 return build_string (sys_translate_unix (nm
));
1868 if (nm
== SDATA (name
))
1870 return build_string (nm
);
1874 /* Now determine directory to start with and put it in NEWDIR */
1878 if (nm
[0] == '~') /* prefix ~ */
1883 || nm
[1] == 0)/* ~/filename */
1885 if (!(newdir
= (unsigned char *) egetenv ("HOME")))
1886 newdir
= (unsigned char *) "";
1889 nm
++; /* Don't leave the slash in nm. */
1892 else /* ~user/filename */
1894 /* Get past ~ to user */
1895 unsigned char *user
= nm
+ 1;
1896 /* Find end of name. */
1897 unsigned char *ptr
= (unsigned char *) index (user
, '/');
1898 int len
= ptr
? ptr
- user
: strlen (user
);
1900 unsigned char *ptr1
= index (user
, ':');
1901 if (ptr1
!= 0 && ptr1
- user
< len
)
1904 /* Copy the user name into temp storage. */
1905 o
= (unsigned char *) alloca (len
+ 1);
1906 bcopy ((char *) user
, o
, len
);
1909 /* Look up the user name. */
1910 pw
= (struct passwd
*) getpwnam (o
+ 1);
1912 error ("\"%s\" isn't a registered user", o
+ 1);
1914 newdir
= (unsigned char *) pw
->pw_dir
;
1916 /* Discard the user name from NM. */
1923 #endif /* not VMS */
1927 defalt
= current_buffer
->directory
;
1928 CHECK_STRING (defalt
);
1929 newdir
= SDATA (defalt
);
1932 /* Now concatenate the directory and name to new space in the stack frame */
1934 tlen
= (newdir
? strlen (newdir
) + 1 : 0) + strlen (nm
) + 1;
1935 target
= (unsigned char *) alloca (tlen
);
1941 if (nm
[0] == 0 || nm
[0] == '/')
1942 strcpy (target
, newdir
);
1945 file_name_as_directory (target
, newdir
);
1948 strcat (target
, nm
);
1950 if (index (target
, '/'))
1951 strcpy (target
, sys_translate_unix (target
));
1954 /* Now canonicalize by removing /. and /foo/.. if they appear */
1962 if (*p
!= ']' && *p
!= '>' && *p
!= '-')
1968 else if ((p
[0] == ']' || p
[0] == '>') && p
[0] == p
[1] + 2)
1969 /* brackets are offset from each other by 2 */
1972 if (*p
!= '.' && *p
!= '-' && o
[-1] != '.')
1973 /* convert [foo][bar] to [bar] */
1974 while (o
[-1] != '[' && o
[-1] != '<')
1976 else if (*p
== '-' && *o
!= '.')
1979 else if (p
[0] == '-' && o
[-1] == '.' &&
1980 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>'))
1981 /* flush .foo.- ; leave - if stopped by '[' or '<' */
1985 while (o
[-1] != '.' && o
[-1] != '[' && o
[-1] != '<');
1986 if (p
[1] == '.') /* foo.-.bar ==> bar. */
1988 else if (o
[-1] == '.') /* '.foo.-]' ==> ']' */
1990 /* else [foo.-] ==> [-] */
1996 o
[-1] != '[' && o
[-1] != '<' && o
[-1] != '.' &&
1997 p
[1] != ']' && p
[1] != '>' && p
[1] != '.')
2007 else if (!strncmp (p
, "//", 2)
2009 /* // at start of filename is meaningful in Apollo system. */
2017 else if (p
[0] == '/' && p
[1] == '.' &&
2018 (p
[2] == '/' || p
[2] == 0))
2020 else if (!strncmp (p
, "/..", 3)
2021 /* `/../' is the "superroot" on certain file systems. */
2023 && (p
[3] == '/' || p
[3] == 0))
2025 while (o
!= target
&& *--o
!= '/')
2028 if (o
== target
+ 1 && o
[-1] == '/' && o
[0] == '/')
2032 if (o
== target
&& *o
== '/')
2040 #endif /* not VMS */
2043 return make_string (target
, o
- target
);
2047 DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name
,
2048 Ssubstitute_in_file_name
, 1, 1, 0,
2049 doc
: /* Substitute environment variables referred to in FILENAME.
2050 `$FOO' where FOO is an environment variable name means to substitute
2051 the value of that variable. The variable name should be terminated
2052 with a character not a letter, digit or underscore; otherwise, enclose
2053 the entire variable name in braces.
2054 If `/~' appears, all of FILENAME through that `/' is discarded.
2056 On VMS, `$' substitution is not done; this function does little and only
2057 duplicates what `expand-file-name' does. */)
2059 Lisp_Object filename
;
2063 register unsigned char *s
, *p
, *o
, *x
, *endp
;
2064 unsigned char *target
= NULL
;
2066 int substituted
= 0;
2069 Lisp_Object handler
;
2071 CHECK_STRING (filename
);
2073 /* If the file name has special constructs in it,
2074 call the corresponding file handler. */
2075 handler
= Ffind_file_name_handler (filename
, Qsubstitute_in_file_name
);
2076 if (!NILP (handler
))
2077 return call2 (handler
, Qsubstitute_in_file_name
, filename
);
2079 nm
= SDATA (filename
);
2081 nm
= strcpy (alloca (strlen (nm
) + 1), nm
);
2082 CORRECT_DIR_SEPS (nm
);
2083 substituted
= (strcmp (nm
, SDATA (filename
)) != 0);
2085 endp
= nm
+ SBYTES (filename
);
2087 /* If /~ or // appears, discard everything through first slash. */
2089 for (p
= nm
; p
!= endp
; p
++)
2092 #if defined (APOLLO) || defined (WINDOWSNT) || defined(CYGWIN)
2093 /* // at start of file name is meaningful in Apollo,
2094 WindowsNT and Cygwin systems. */
2095 || (IS_DIRECTORY_SEP (p
[0]) && p
- 1 != nm
)
2096 #else /* not (APOLLO || WINDOWSNT || CYGWIN) */
2097 || IS_DIRECTORY_SEP (p
[0])
2098 #endif /* not (APOLLO || WINDOWSNT || CYGWIN) */
2103 || p
[-1] == ':' || p
[-1] == ']' || p
[-1] == '>'
2105 || IS_DIRECTORY_SEP (p
[-1])))
2107 for (s
= p
; *s
&& (!IS_DIRECTORY_SEP (*s
)
2112 if (p
[0] == '~' && s
> p
+ 1) /* we've got "/~something/" */
2114 o
= (unsigned char *) alloca (s
- p
+ 1);
2115 bcopy ((char *) p
, o
, s
- p
);
2118 pw
= (struct passwd
*) getpwnam (o
+ 1);
2120 /* If we have ~/ or ~user and `user' exists, discard
2121 everything up to ~. But if `user' does not exist, leave
2122 ~user alone, it might be a literal file name. */
2123 if (IS_DIRECTORY_SEP (p
[0]) || s
== p
+ 1 || pw
)
2130 /* see comment in expand-file-name about drive specifiers */
2131 else if (IS_DRIVE (p
[0]) && p
[1] == ':'
2132 && p
> nm
&& IS_DIRECTORY_SEP (p
[-1]))
2141 return make_specified_string (nm
, -1, strlen (nm
),
2142 STRING_MULTIBYTE (filename
));
2145 /* See if any variables are substituted into the string
2146 and find the total length of their values in `total' */
2148 for (p
= nm
; p
!= endp
;)
2158 /* "$$" means a single "$" */
2167 while (p
!= endp
&& *p
!= '}') p
++;
2168 if (*p
!= '}') goto missingclose
;
2174 while (p
!= endp
&& (isalnum (*p
) || *p
== '_')) p
++;
2178 /* Copy out the variable name */
2179 target
= (unsigned char *) alloca (s
- o
+ 1);
2180 strncpy (target
, o
, s
- o
);
2183 strupr (target
); /* $home == $HOME etc. */
2186 /* Get variable value */
2187 o
= (unsigned char *) egetenv (target
);
2190 total
+= strlen (o
);
2200 /* If substitution required, recopy the string and do it */
2201 /* Make space in stack frame for the new copy */
2202 xnm
= (unsigned char *) alloca (SBYTES (filename
) + total
+ 1);
2205 /* Copy the rest of the name through, replacing $ constructs with values */
2222 while (p
!= endp
&& *p
!= '}') p
++;
2223 if (*p
!= '}') goto missingclose
;
2229 while (p
!= endp
&& (isalnum (*p
) || *p
== '_')) p
++;
2233 /* Copy out the variable name */
2234 target
= (unsigned char *) alloca (s
- o
+ 1);
2235 strncpy (target
, o
, s
- o
);
2238 strupr (target
); /* $home == $HOME etc. */
2241 /* Get variable value */
2242 o
= (unsigned char *) egetenv (target
);
2246 strcpy (x
, target
); x
+= strlen (target
);
2248 else if (STRING_MULTIBYTE (filename
))
2250 /* If the original string is multibyte,
2251 convert what we substitute into multibyte. */
2254 int c
= unibyte_char_to_multibyte (*o
++);
2255 x
+= CHAR_STRING (c
, x
);
2267 /* If /~ or // appears, discard everything through first slash. */
2269 for (p
= xnm
; p
!= x
; p
++)
2271 #if defined (APOLLO) || defined (WINDOWSNT) || defined(CYGWIN)
2272 || (IS_DIRECTORY_SEP (p
[0]) && p
- 1 != xnm
)
2273 #else /* not (APOLLO || WINDOWSNT || CYGWIN) */
2274 || IS_DIRECTORY_SEP (p
[0])
2275 #endif /* not (APOLLO || WINDOWSNT || CYGWIN) */
2277 && p
!= xnm
&& IS_DIRECTORY_SEP (p
[-1]))
2280 else if (IS_DRIVE (p
[0]) && p
[1] == ':'
2281 && p
> xnm
&& IS_DIRECTORY_SEP (p
[-1]))
2285 return make_specified_string (xnm
, -1, x
- xnm
, STRING_MULTIBYTE (filename
));
2288 error ("Bad format environment-variable substitution");
2290 error ("Missing \"}\" in environment-variable substitution");
2292 error ("Substituting nonexistent environment variable \"%s\"", target
);
2295 #endif /* not VMS */
2299 /* A slightly faster and more convenient way to get
2300 (directory-file-name (expand-file-name FOO)). */
2303 expand_and_dir_to_file (filename
, defdir
)
2304 Lisp_Object filename
, defdir
;
2306 register Lisp_Object absname
;
2308 absname
= Fexpand_file_name (filename
, defdir
);
2311 register int c
= SREF (absname
, SBYTES (absname
) - 1);
2312 if (c
== ':' || c
== ']' || c
== '>')
2313 absname
= Fdirectory_file_name (absname
);
2316 /* Remove final slash, if any (unless this is the root dir).
2317 stat behaves differently depending! */
2318 if (SCHARS (absname
) > 1
2319 && IS_DIRECTORY_SEP (SREF (absname
, SBYTES (absname
) - 1))
2320 && !IS_DEVICE_SEP (SREF (absname
, SBYTES (absname
)-2)))
2321 /* We cannot take shortcuts; they might be wrong for magic file names. */
2322 absname
= Fdirectory_file_name (absname
);
2327 /* Signal an error if the file ABSNAME already exists.
2328 If INTERACTIVE is nonzero, ask the user whether to proceed,
2329 and bypass the error if the user says to go ahead.
2330 QUERYSTRING is a name for the action that is being considered
2333 *STATPTR is used to store the stat information if the file exists.
2334 If the file does not exist, STATPTR->st_mode is set to 0.
2335 If STATPTR is null, we don't store into it.
2337 If QUICK is nonzero, we ask for y or n, not yes or no. */
2340 barf_or_query_if_file_exists (absname
, querystring
, interactive
, statptr
, quick
)
2341 Lisp_Object absname
;
2342 unsigned char *querystring
;
2344 struct stat
*statptr
;
2347 register Lisp_Object tem
, encoded_filename
;
2348 struct stat statbuf
;
2349 struct gcpro gcpro1
;
2351 encoded_filename
= ENCODE_FILE (absname
);
2353 /* stat is a good way to tell whether the file exists,
2354 regardless of what access permissions it has. */
2355 if (lstat (SDATA (encoded_filename
), &statbuf
) >= 0)
2358 Fsignal (Qfile_already_exists
,
2359 Fcons (build_string ("File already exists"),
2360 Fcons (absname
, Qnil
)));
2362 tem
= format2 ("File %s already exists; %s anyway? ",
2363 absname
, build_string (querystring
));
2365 tem
= Fy_or_n_p (tem
);
2367 tem
= do_yes_or_no_p (tem
);
2370 Fsignal (Qfile_already_exists
,
2371 Fcons (build_string ("File already exists"),
2372 Fcons (absname
, Qnil
)));
2379 statptr
->st_mode
= 0;
2384 DEFUN ("copy-file", Fcopy_file
, Scopy_file
, 2, 4,
2385 "fCopy file: \nFCopy %s to file: \np\nP",
2386 doc
: /* Copy FILE to NEWNAME. Both args must be strings.
2387 If NEWNAME names a directory, copy FILE there.
2388 Signals a `file-already-exists' error if file NEWNAME already exists,
2389 unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil.
2390 A number as third arg means request confirmation if NEWNAME already exists.
2391 This is what happens in interactive use with M-x.
2392 Fourth arg KEEP-TIME non-nil means give the new file the same
2393 last-modified time as the old one. (This works on only some systems.)
2394 A prefix arg makes KEEP-TIME non-nil.
2395 Also set the file modes of the target file to match the source file. */)
2396 (file
, newname
, ok_if_already_exists
, keep_time
)
2397 Lisp_Object file
, newname
, ok_if_already_exists
, keep_time
;
2400 char buf
[16 * 1024];
2401 struct stat st
, out_st
;
2402 Lisp_Object handler
;
2403 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2404 int count
= SPECPDL_INDEX ();
2405 int input_file_statable_p
;
2406 Lisp_Object encoded_file
, encoded_newname
;
2408 encoded_file
= encoded_newname
= Qnil
;
2409 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
2410 CHECK_STRING (file
);
2411 CHECK_STRING (newname
);
2413 if (!NILP (Ffile_directory_p (newname
)))
2414 newname
= Fexpand_file_name (Ffile_name_nondirectory (file
), newname
);
2416 newname
= Fexpand_file_name (newname
, Qnil
);
2418 file
= Fexpand_file_name (file
, Qnil
);
2420 /* If the input file name has special constructs in it,
2421 call the corresponding file handler. */
2422 handler
= Ffind_file_name_handler (file
, Qcopy_file
);
2423 /* Likewise for output file name. */
2425 handler
= Ffind_file_name_handler (newname
, Qcopy_file
);
2426 if (!NILP (handler
))
2427 RETURN_UNGCPRO (call5 (handler
, Qcopy_file
, file
, newname
,
2428 ok_if_already_exists
, keep_time
));
2430 encoded_file
= ENCODE_FILE (file
);
2431 encoded_newname
= ENCODE_FILE (newname
);
2433 if (NILP (ok_if_already_exists
)
2434 || INTEGERP (ok_if_already_exists
))
2435 barf_or_query_if_file_exists (encoded_newname
, "copy to it",
2436 INTEGERP (ok_if_already_exists
), &out_st
, 0);
2437 else if (stat (SDATA (encoded_newname
), &out_st
) < 0)
2441 if (!CopyFile (SDATA (encoded_file
),
2442 SDATA (encoded_newname
),
2444 report_file_error ("Copying file", Fcons (file
, Fcons (newname
, Qnil
)));
2445 /* CopyFile retains the timestamp by default. */
2446 else if (NILP (keep_time
))
2452 EMACS_GET_TIME (now
);
2453 filename
= SDATA (encoded_newname
);
2455 /* Ensure file is writable while its modified time is set. */
2456 attributes
= GetFileAttributes (filename
);
2457 SetFileAttributes (filename
, attributes
& ~FILE_ATTRIBUTE_READONLY
);
2458 if (set_file_times (filename
, now
, now
))
2460 /* Restore original attributes. */
2461 SetFileAttributes (filename
, attributes
);
2462 Fsignal (Qfile_date_error
,
2463 Fcons (build_string ("Cannot set file date"),
2464 Fcons (newname
, Qnil
)));
2466 /* Restore original attributes. */
2467 SetFileAttributes (filename
, attributes
);
2469 #else /* not WINDOWSNT */
2471 ifd
= emacs_open (SDATA (encoded_file
), O_RDONLY
, 0);
2475 report_file_error ("Opening input file", Fcons (file
, Qnil
));
2477 record_unwind_protect (close_file_unwind
, make_number (ifd
));
2479 /* We can only copy regular files and symbolic links. Other files are not
2481 input_file_statable_p
= (fstat (ifd
, &st
) >= 0);
2483 #if !defined (DOS_NT) || __DJGPP__ > 1
2484 if (out_st
.st_mode
!= 0
2485 && st
.st_dev
== out_st
.st_dev
&& st
.st_ino
== out_st
.st_ino
)
2488 report_file_error ("Input and output files are the same",
2489 Fcons (file
, Fcons (newname
, Qnil
)));
2493 #if defined (S_ISREG) && defined (S_ISLNK)
2494 if (input_file_statable_p
)
2496 if (!(S_ISREG (st
.st_mode
)) && !(S_ISLNK (st
.st_mode
)))
2498 #if defined (EISDIR)
2499 /* Get a better looking error message. */
2502 report_file_error ("Non-regular file", Fcons (file
, Qnil
));
2505 #endif /* S_ISREG && S_ISLNK */
2508 /* Create the copy file with the same record format as the input file */
2509 ofd
= sys_creat (SDATA (encoded_newname
), 0666, ifd
);
2512 /* System's default file type was set to binary by _fmode in emacs.c. */
2513 ofd
= creat (SDATA (encoded_newname
), S_IREAD
| S_IWRITE
);
2514 #else /* not MSDOS */
2515 ofd
= creat (SDATA (encoded_newname
), 0666);
2516 #endif /* not MSDOS */
2519 report_file_error ("Opening output file", Fcons (newname
, Qnil
));
2521 record_unwind_protect (close_file_unwind
, make_number (ofd
));
2525 while ((n
= emacs_read (ifd
, buf
, sizeof buf
)) > 0)
2526 if (emacs_write (ofd
, buf
, n
) != n
)
2527 report_file_error ("I/O error", Fcons (newname
, Qnil
));
2530 /* Closing the output clobbers the file times on some systems. */
2531 if (emacs_close (ofd
) < 0)
2532 report_file_error ("I/O error", Fcons (newname
, Qnil
));
2534 if (input_file_statable_p
)
2536 if (!NILP (keep_time
))
2538 EMACS_TIME atime
, mtime
;
2539 EMACS_SET_SECS_USECS (atime
, st
.st_atime
, 0);
2540 EMACS_SET_SECS_USECS (mtime
, st
.st_mtime
, 0);
2541 if (set_file_times (SDATA (encoded_newname
),
2543 Fsignal (Qfile_date_error
,
2544 Fcons (build_string ("Cannot set file date"),
2545 Fcons (newname
, Qnil
)));
2548 chmod (SDATA (encoded_newname
), st
.st_mode
& 07777);
2550 #if defined (__DJGPP__) && __DJGPP__ > 1
2551 /* In DJGPP v2.0 and later, fstat usually returns true file mode bits,
2552 and if it can't, it tells so. Otherwise, under MSDOS we usually
2553 get only the READ bit, which will make the copied file read-only,
2554 so it's better not to chmod at all. */
2555 if ((_djstat_flags
& _STFAIL_WRITEBIT
) == 0)
2556 chmod (SDATA (encoded_newname
), st
.st_mode
& 07777);
2557 #endif /* DJGPP version 2 or newer */
2562 #endif /* WINDOWSNT */
2564 /* Discard the unwind protects. */
2565 specpdl_ptr
= specpdl
+ count
;
2571 DEFUN ("make-directory-internal", Fmake_directory_internal
,
2572 Smake_directory_internal
, 1, 1, 0,
2573 doc
: /* Create a new directory named DIRECTORY. */)
2575 Lisp_Object directory
;
2577 const unsigned char *dir
;
2578 Lisp_Object handler
;
2579 Lisp_Object encoded_dir
;
2581 CHECK_STRING (directory
);
2582 directory
= Fexpand_file_name (directory
, Qnil
);
2584 handler
= Ffind_file_name_handler (directory
, Qmake_directory_internal
);
2585 if (!NILP (handler
))
2586 return call2 (handler
, Qmake_directory_internal
, directory
);
2588 encoded_dir
= ENCODE_FILE (directory
);
2590 dir
= SDATA (encoded_dir
);
2593 if (mkdir (dir
) != 0)
2595 if (mkdir (dir
, 0777) != 0)
2597 report_file_error ("Creating directory", Flist (1, &directory
));
2602 DEFUN ("delete-directory", Fdelete_directory
, Sdelete_directory
, 1, 1, "FDelete directory: ",
2603 doc
: /* Delete the directory named DIRECTORY. Does not follow symlinks. */)
2605 Lisp_Object directory
;
2607 const unsigned char *dir
;
2608 Lisp_Object handler
;
2609 Lisp_Object encoded_dir
;
2611 CHECK_STRING (directory
);
2612 directory
= Fdirectory_file_name (Fexpand_file_name (directory
, Qnil
));
2614 handler
= Ffind_file_name_handler (directory
, Qdelete_directory
);
2615 if (!NILP (handler
))
2616 return call2 (handler
, Qdelete_directory
, directory
);
2618 encoded_dir
= ENCODE_FILE (directory
);
2620 dir
= SDATA (encoded_dir
);
2622 if (rmdir (dir
) != 0)
2623 report_file_error ("Removing directory", Flist (1, &directory
));
2628 DEFUN ("delete-file", Fdelete_file
, Sdelete_file
, 1, 1, "fDelete file: ",
2629 doc
: /* Delete file named FILENAME. If it is a symlink, remove the symlink.
2630 If file has multiple names, it continues to exist with the other names. */)
2632 Lisp_Object filename
;
2634 Lisp_Object handler
;
2635 Lisp_Object encoded_file
;
2636 struct gcpro gcpro1
;
2639 if (!NILP (Ffile_directory_p (filename
))
2640 && NILP (Ffile_symlink_p (filename
)))
2641 Fsignal (Qfile_error
,
2642 Fcons (build_string ("Removing old name: is a directory"),
2643 Fcons (filename
, Qnil
)));
2645 filename
= Fexpand_file_name (filename
, Qnil
);
2647 handler
= Ffind_file_name_handler (filename
, Qdelete_file
);
2648 if (!NILP (handler
))
2649 return call2 (handler
, Qdelete_file
, filename
);
2651 encoded_file
= ENCODE_FILE (filename
);
2653 if (0 > unlink (SDATA (encoded_file
)))
2654 report_file_error ("Removing old name", Flist (1, &filename
));
2659 internal_delete_file_1 (ignore
)
2665 /* Delete file FILENAME, returning 1 if successful and 0 if failed. */
2668 internal_delete_file (filename
)
2669 Lisp_Object filename
;
2671 return NILP (internal_condition_case_1 (Fdelete_file
, filename
,
2672 Qt
, internal_delete_file_1
));
2675 DEFUN ("rename-file", Frename_file
, Srename_file
, 2, 3,
2676 "fRename file: \nFRename %s to file: \np",
2677 doc
: /* Rename FILE as NEWNAME. Both args strings.
2678 If file has names other than FILE, it continues to have those names.
2679 Signals a `file-already-exists' error if a file NEWNAME already exists
2680 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2681 A number as third arg means request confirmation if NEWNAME already exists.
2682 This is what happens in interactive use with M-x. */)
2683 (file
, newname
, ok_if_already_exists
)
2684 Lisp_Object file
, newname
, ok_if_already_exists
;
2687 Lisp_Object args
[2];
2689 Lisp_Object handler
;
2690 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
2691 Lisp_Object encoded_file
, encoded_newname
, symlink_target
;
2693 symlink_target
= encoded_file
= encoded_newname
= Qnil
;
2694 GCPRO5 (file
, newname
, encoded_file
, encoded_newname
, symlink_target
);
2695 CHECK_STRING (file
);
2696 CHECK_STRING (newname
);
2697 file
= Fexpand_file_name (file
, Qnil
);
2698 newname
= Fexpand_file_name (newname
, Qnil
);
2700 /* If the file name has special constructs in it,
2701 call the corresponding file handler. */
2702 handler
= Ffind_file_name_handler (file
, Qrename_file
);
2704 handler
= Ffind_file_name_handler (newname
, Qrename_file
);
2705 if (!NILP (handler
))
2706 RETURN_UNGCPRO (call4 (handler
, Qrename_file
,
2707 file
, newname
, ok_if_already_exists
));
2709 encoded_file
= ENCODE_FILE (file
);
2710 encoded_newname
= ENCODE_FILE (newname
);
2713 /* If the file names are identical but for the case, don't ask for
2714 confirmation: they simply want to change the letter-case of the
2716 if (NILP (Fstring_equal (Fdowncase (file
), Fdowncase (newname
))))
2718 if (NILP (ok_if_already_exists
)
2719 || INTEGERP (ok_if_already_exists
))
2720 barf_or_query_if_file_exists (encoded_newname
, "rename to it",
2721 INTEGERP (ok_if_already_exists
), 0, 0);
2723 if (0 > rename (SDATA (encoded_file
), SDATA (encoded_newname
)))
2725 if (0 > link (SDATA (encoded_file
), SDATA (encoded_newname
))
2726 || 0 > unlink (SDATA (encoded_file
)))
2732 symlink_target
= Ffile_symlink_p (file
);
2733 if (! NILP (symlink_target
))
2734 Fmake_symbolic_link (symlink_target
, newname
,
2735 NILP (ok_if_already_exists
) ? Qnil
: Qt
);
2738 Fcopy_file (file
, newname
,
2739 /* We have already prompted if it was an integer,
2740 so don't have copy-file prompt again. */
2741 NILP (ok_if_already_exists
) ? Qnil
: Qt
, Qt
);
2742 Fdelete_file (file
);
2749 report_file_error ("Renaming", Flist (2, args
));
2752 report_file_error ("Renaming", Flist (2, &file
));
2759 DEFUN ("add-name-to-file", Fadd_name_to_file
, Sadd_name_to_file
, 2, 3,
2760 "fAdd name to file: \nFName to add to %s: \np",
2761 doc
: /* Give FILE additional name NEWNAME. Both args strings.
2762 Signals a `file-already-exists' error if a file NEWNAME already exists
2763 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2764 A number as third arg means request confirmation if NEWNAME already exists.
2765 This is what happens in interactive use with M-x. */)
2766 (file
, newname
, ok_if_already_exists
)
2767 Lisp_Object file
, newname
, ok_if_already_exists
;
2770 Lisp_Object args
[2];
2772 Lisp_Object handler
;
2773 Lisp_Object encoded_file
, encoded_newname
;
2774 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2776 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
2777 encoded_file
= encoded_newname
= Qnil
;
2778 CHECK_STRING (file
);
2779 CHECK_STRING (newname
);
2780 file
= Fexpand_file_name (file
, Qnil
);
2781 newname
= Fexpand_file_name (newname
, Qnil
);
2783 /* If the file name has special constructs in it,
2784 call the corresponding file handler. */
2785 handler
= Ffind_file_name_handler (file
, Qadd_name_to_file
);
2786 if (!NILP (handler
))
2787 RETURN_UNGCPRO (call4 (handler
, Qadd_name_to_file
, file
,
2788 newname
, ok_if_already_exists
));
2790 /* If the new name has special constructs in it,
2791 call the corresponding file handler. */
2792 handler
= Ffind_file_name_handler (newname
, Qadd_name_to_file
);
2793 if (!NILP (handler
))
2794 RETURN_UNGCPRO (call4 (handler
, Qadd_name_to_file
, file
,
2795 newname
, ok_if_already_exists
));
2797 encoded_file
= ENCODE_FILE (file
);
2798 encoded_newname
= ENCODE_FILE (newname
);
2800 if (NILP (ok_if_already_exists
)
2801 || INTEGERP (ok_if_already_exists
))
2802 barf_or_query_if_file_exists (encoded_newname
, "make it a new name",
2803 INTEGERP (ok_if_already_exists
), 0, 0);
2805 unlink (SDATA (newname
));
2806 if (0 > link (SDATA (encoded_file
), SDATA (encoded_newname
)))
2811 report_file_error ("Adding new name", Flist (2, args
));
2813 report_file_error ("Adding new name", Flist (2, &file
));
2822 DEFUN ("make-symbolic-link", Fmake_symbolic_link
, Smake_symbolic_link
, 2, 3,
2823 "FMake symbolic link to file: \nFMake symbolic link to file %s: \np",
2824 doc
: /* Make a symbolic link to FILENAME, named LINKNAME. Both args strings.
2825 Signals a `file-already-exists' error if a file LINKNAME already exists
2826 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2827 A number as third arg means request confirmation if LINKNAME already exists.
2828 This happens for interactive use with M-x. */)
2829 (filename
, linkname
, ok_if_already_exists
)
2830 Lisp_Object filename
, linkname
, ok_if_already_exists
;
2833 Lisp_Object args
[2];
2835 Lisp_Object handler
;
2836 Lisp_Object encoded_filename
, encoded_linkname
;
2837 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2839 GCPRO4 (filename
, linkname
, encoded_filename
, encoded_linkname
);
2840 encoded_filename
= encoded_linkname
= Qnil
;
2841 CHECK_STRING (filename
);
2842 CHECK_STRING (linkname
);
2843 /* If the link target has a ~, we must expand it to get
2844 a truly valid file name. Otherwise, do not expand;
2845 we want to permit links to relative file names. */
2846 if (SREF (filename
, 0) == '~')
2847 filename
= Fexpand_file_name (filename
, Qnil
);
2848 linkname
= Fexpand_file_name (linkname
, Qnil
);
2850 /* If the file name has special constructs in it,
2851 call the corresponding file handler. */
2852 handler
= Ffind_file_name_handler (filename
, Qmake_symbolic_link
);
2853 if (!NILP (handler
))
2854 RETURN_UNGCPRO (call4 (handler
, Qmake_symbolic_link
, filename
,
2855 linkname
, ok_if_already_exists
));
2857 /* If the new link name has special constructs in it,
2858 call the corresponding file handler. */
2859 handler
= Ffind_file_name_handler (linkname
, Qmake_symbolic_link
);
2860 if (!NILP (handler
))
2861 RETURN_UNGCPRO (call4 (handler
, Qmake_symbolic_link
, filename
,
2862 linkname
, ok_if_already_exists
));
2864 encoded_filename
= ENCODE_FILE (filename
);
2865 encoded_linkname
= ENCODE_FILE (linkname
);
2867 if (NILP (ok_if_already_exists
)
2868 || INTEGERP (ok_if_already_exists
))
2869 barf_or_query_if_file_exists (encoded_linkname
, "make it a link",
2870 INTEGERP (ok_if_already_exists
), 0, 0);
2871 if (0 > symlink (SDATA (encoded_filename
),
2872 SDATA (encoded_linkname
)))
2874 /* If we didn't complain already, silently delete existing file. */
2875 if (errno
== EEXIST
)
2877 unlink (SDATA (encoded_linkname
));
2878 if (0 <= symlink (SDATA (encoded_filename
),
2879 SDATA (encoded_linkname
)))
2889 report_file_error ("Making symbolic link", Flist (2, args
));
2891 report_file_error ("Making symbolic link", Flist (2, &filename
));
2897 #endif /* S_IFLNK */
2901 DEFUN ("define-logical-name", Fdefine_logical_name
, Sdefine_logical_name
,
2902 2, 2, "sDefine logical name: \nsDefine logical name %s as: ",
2903 doc
: /* Define the job-wide logical name NAME to have the value STRING.
2904 If STRING is nil or a null string, the logical name NAME is deleted. */)
2909 CHECK_STRING (name
);
2911 delete_logical_name (SDATA (name
));
2914 CHECK_STRING (string
);
2916 if (SCHARS (string
) == 0)
2917 delete_logical_name (SDATA (name
));
2919 define_logical_name (SDATA (name
), SDATA (string
));
2928 DEFUN ("sysnetunam", Fsysnetunam
, Ssysnetunam
, 2, 2, 0,
2929 doc
: /* Open a network connection to PATH using LOGIN as the login string. */)
2931 Lisp_Object path
, login
;
2935 CHECK_STRING (path
);
2936 CHECK_STRING (login
);
2938 netresult
= netunam (SDATA (path
), SDATA (login
));
2940 if (netresult
== -1)
2945 #endif /* HPUX_NET */
2947 DEFUN ("file-name-absolute-p", Ffile_name_absolute_p
, Sfile_name_absolute_p
,
2949 doc
: /* Return t if file FILENAME specifies an absolute file name.
2950 On Unix, this is a name starting with a `/' or a `~'. */)
2952 Lisp_Object filename
;
2954 const unsigned char *ptr
;
2956 CHECK_STRING (filename
);
2957 ptr
= SDATA (filename
);
2958 if (IS_DIRECTORY_SEP (*ptr
) || *ptr
== '~'
2960 /* ??? This criterion is probably wrong for '<'. */
2961 || index (ptr
, ':') || index (ptr
, '<')
2962 || (*ptr
== '[' && (ptr
[1] != '-' || (ptr
[2] != '.' && ptr
[2] != ']'))
2966 || (IS_DRIVE (*ptr
) && ptr
[1] == ':' && IS_DIRECTORY_SEP (ptr
[2]))
2974 /* Return nonzero if file FILENAME exists and can be executed. */
2977 check_executable (filename
)
2981 int len
= strlen (filename
);
2984 if (stat (filename
, &st
) < 0)
2986 #if defined (WINDOWSNT) || (defined (MSDOS) && __DJGPP__ > 1)
2987 return ((st
.st_mode
& S_IEXEC
) != 0);
2989 return (S_ISREG (st
.st_mode
)
2991 && (stricmp ((suffix
= filename
+ len
-4), ".com") == 0
2992 || stricmp (suffix
, ".exe") == 0
2993 || stricmp (suffix
, ".bat") == 0)
2994 || (st
.st_mode
& S_IFMT
) == S_IFDIR
);
2995 #endif /* not WINDOWSNT */
2996 #else /* not DOS_NT */
2997 #ifdef HAVE_EUIDACCESS
2998 return (euidaccess (filename
, 1) >= 0);
3000 /* Access isn't quite right because it uses the real uid
3001 and we really want to test with the effective uid.
3002 But Unix doesn't give us a right way to do it. */
3003 return (access (filename
, 1) >= 0);
3005 #endif /* not DOS_NT */
3008 /* Return nonzero if file FILENAME exists and can be written. */
3011 check_writable (filename
)
3016 if (stat (filename
, &st
) < 0)
3018 return (st
.st_mode
& S_IWRITE
|| (st
.st_mode
& S_IFMT
) == S_IFDIR
);
3019 #else /* not MSDOS */
3020 #ifdef HAVE_EUIDACCESS
3021 return (euidaccess (filename
, 2) >= 0);
3023 /* Access isn't quite right because it uses the real uid
3024 and we really want to test with the effective uid.
3025 But Unix doesn't give us a right way to do it.
3026 Opening with O_WRONLY could work for an ordinary file,
3027 but would lose for directories. */
3028 return (access (filename
, 2) >= 0);
3030 #endif /* not MSDOS */
3033 DEFUN ("file-exists-p", Ffile_exists_p
, Sfile_exists_p
, 1, 1, 0,
3034 doc
: /* Return t if file FILENAME exists. (This does not mean you can read it.)
3035 See also `file-readable-p' and `file-attributes'. */)
3037 Lisp_Object filename
;
3039 Lisp_Object absname
;
3040 Lisp_Object handler
;
3041 struct stat statbuf
;
3043 CHECK_STRING (filename
);
3044 absname
= Fexpand_file_name (filename
, Qnil
);
3046 /* If the file name has special constructs in it,
3047 call the corresponding file handler. */
3048 handler
= Ffind_file_name_handler (absname
, Qfile_exists_p
);
3049 if (!NILP (handler
))
3050 return call2 (handler
, Qfile_exists_p
, absname
);
3052 absname
= ENCODE_FILE (absname
);
3054 return (stat (SDATA (absname
), &statbuf
) >= 0) ? Qt
: Qnil
;
3057 DEFUN ("file-executable-p", Ffile_executable_p
, Sfile_executable_p
, 1, 1, 0,
3058 doc
: /* Return t if FILENAME can be executed by you.
3059 For a directory, this means you can access files in that directory. */)
3061 Lisp_Object filename
;
3063 Lisp_Object absname
;
3064 Lisp_Object handler
;
3066 CHECK_STRING (filename
);
3067 absname
= Fexpand_file_name (filename
, Qnil
);
3069 /* If the file name has special constructs in it,
3070 call the corresponding file handler. */
3071 handler
= Ffind_file_name_handler (absname
, Qfile_executable_p
);
3072 if (!NILP (handler
))
3073 return call2 (handler
, Qfile_executable_p
, absname
);
3075 absname
= ENCODE_FILE (absname
);
3077 return (check_executable (SDATA (absname
)) ? Qt
: Qnil
);
3080 DEFUN ("file-readable-p", Ffile_readable_p
, Sfile_readable_p
, 1, 1, 0,
3081 doc
: /* Return t if file FILENAME exists and you can read it.
3082 See also `file-exists-p' and `file-attributes'. */)
3084 Lisp_Object filename
;
3086 Lisp_Object absname
;
3087 Lisp_Object handler
;
3090 struct stat statbuf
;
3092 CHECK_STRING (filename
);
3093 absname
= Fexpand_file_name (filename
, Qnil
);
3095 /* If the file name has special constructs in it,
3096 call the corresponding file handler. */
3097 handler
= Ffind_file_name_handler (absname
, Qfile_readable_p
);
3098 if (!NILP (handler
))
3099 return call2 (handler
, Qfile_readable_p
, absname
);
3101 absname
= ENCODE_FILE (absname
);
3103 #if defined(DOS_NT) || defined(macintosh)
3104 /* Under MS-DOS, Windows, and Macintosh, open does not work for
3106 if (access (SDATA (absname
), 0) == 0)
3109 #else /* not DOS_NT and not macintosh */
3111 #if defined (S_ISFIFO) && defined (O_NONBLOCK)
3112 /* Opening a fifo without O_NONBLOCK can wait.
3113 We don't want to wait. But we don't want to mess wth O_NONBLOCK
3114 except in the case of a fifo, on a system which handles it. */
3115 desc
= stat (SDATA (absname
), &statbuf
);
3118 if (S_ISFIFO (statbuf
.st_mode
))
3119 flags
|= O_NONBLOCK
;
3121 desc
= emacs_open (SDATA (absname
), flags
, 0);
3126 #endif /* not DOS_NT and not macintosh */
3129 /* Having this before file-symlink-p mysteriously caused it to be forgotten
3131 DEFUN ("file-writable-p", Ffile_writable_p
, Sfile_writable_p
, 1, 1, 0,
3132 doc
: /* Return t if file FILENAME can be written or created by you. */)
3134 Lisp_Object filename
;
3136 Lisp_Object absname
, dir
, encoded
;
3137 Lisp_Object handler
;
3138 struct stat statbuf
;
3140 CHECK_STRING (filename
);
3141 absname
= Fexpand_file_name (filename
, Qnil
);
3143 /* If the file name has special constructs in it,
3144 call the corresponding file handler. */
3145 handler
= Ffind_file_name_handler (absname
, Qfile_writable_p
);
3146 if (!NILP (handler
))
3147 return call2 (handler
, Qfile_writable_p
, absname
);
3149 encoded
= ENCODE_FILE (absname
);
3150 if (stat (SDATA (encoded
), &statbuf
) >= 0)
3151 return (check_writable (SDATA (encoded
))
3154 dir
= Ffile_name_directory (absname
);
3157 dir
= Fdirectory_file_name (dir
);
3161 dir
= Fdirectory_file_name (dir
);
3164 dir
= ENCODE_FILE (dir
);
3166 /* The read-only attribute of the parent directory doesn't affect
3167 whether a file or directory can be created within it. Some day we
3168 should check ACLs though, which do affect this. */
3169 if (stat (SDATA (dir
), &statbuf
) < 0)
3171 return (statbuf
.st_mode
& S_IFMT
) == S_IFDIR
? Qt
: Qnil
;
3173 return (check_writable (!NILP (dir
) ? (char *) SDATA (dir
) : "")
3178 DEFUN ("access-file", Faccess_file
, Saccess_file
, 2, 2, 0,
3179 doc
: /* Access file FILENAME, and get an error if that does not work.
3180 The second argument STRING is used in the error message.
3181 If there is no error, we return nil. */)
3183 Lisp_Object filename
, string
;
3185 Lisp_Object handler
, encoded_filename
, absname
;
3188 CHECK_STRING (filename
);
3189 absname
= Fexpand_file_name (filename
, Qnil
);
3191 CHECK_STRING (string
);
3193 /* If the file name has special constructs in it,
3194 call the corresponding file handler. */
3195 handler
= Ffind_file_name_handler (absname
, Qaccess_file
);
3196 if (!NILP (handler
))
3197 return call3 (handler
, Qaccess_file
, absname
, string
);
3199 encoded_filename
= ENCODE_FILE (absname
);
3201 fd
= emacs_open (SDATA (encoded_filename
), O_RDONLY
, 0);
3203 report_file_error (SDATA (string
), Fcons (filename
, Qnil
));
3209 DEFUN ("file-symlink-p", Ffile_symlink_p
, Sfile_symlink_p
, 1, 1, 0,
3210 doc
: /* Return non-nil if file FILENAME is the name of a symbolic link.
3211 The value is the link target, as a string.
3212 Otherwise returns nil. */)
3214 Lisp_Object filename
;
3216 Lisp_Object handler
;
3218 CHECK_STRING (filename
);
3219 filename
= Fexpand_file_name (filename
, Qnil
);
3221 /* If the file name has special constructs in it,
3222 call the corresponding file handler. */
3223 handler
= Ffind_file_name_handler (filename
, Qfile_symlink_p
);
3224 if (!NILP (handler
))
3225 return call2 (handler
, Qfile_symlink_p
, filename
);
3234 filename
= ENCODE_FILE (filename
);
3241 buf
= (char *) xrealloc (buf
, bufsize
);
3242 bzero (buf
, bufsize
);
3245 valsize
= readlink (SDATA (filename
), buf
, bufsize
);
3249 /* HP-UX reports ERANGE if buffer is too small. */
3250 if (errno
== ERANGE
)
3260 while (valsize
>= bufsize
);
3262 val
= make_string (buf
, valsize
);
3263 if (buf
[0] == '/' && index (buf
, ':'))
3264 val
= concat2 (build_string ("/:"), val
);
3266 val
= DECODE_FILE (val
);
3269 #else /* not S_IFLNK */
3271 #endif /* not S_IFLNK */
3274 DEFUN ("file-directory-p", Ffile_directory_p
, Sfile_directory_p
, 1, 1, 0,
3275 doc
: /* Return t if FILENAME names an existing directory.
3276 Symbolic links to directories count as directories.
3277 See `file-symlink-p' to distinguish symlinks. */)
3279 Lisp_Object filename
;
3281 register Lisp_Object absname
;
3283 Lisp_Object handler
;
3285 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3287 /* If the file name has special constructs in it,
3288 call the corresponding file handler. */
3289 handler
= Ffind_file_name_handler (absname
, Qfile_directory_p
);
3290 if (!NILP (handler
))
3291 return call2 (handler
, Qfile_directory_p
, absname
);
3293 absname
= ENCODE_FILE (absname
);
3295 if (stat (SDATA (absname
), &st
) < 0)
3297 return (st
.st_mode
& S_IFMT
) == S_IFDIR
? Qt
: Qnil
;
3300 DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p
, Sfile_accessible_directory_p
, 1, 1, 0,
3301 doc
: /* Return t if file FILENAME names a directory you can open.
3302 For the value to be t, FILENAME must specify the name of a directory as a file,
3303 and the directory must allow you to open files in it. In order to use a
3304 directory as a buffer's current directory, this predicate must return true.
3305 A directory name spec may be given instead; then the value is t
3306 if the directory so specified exists and really is a readable and
3307 searchable directory. */)
3309 Lisp_Object filename
;
3311 Lisp_Object handler
;
3313 struct gcpro gcpro1
;
3315 /* If the file name has special constructs in it,
3316 call the corresponding file handler. */
3317 handler
= Ffind_file_name_handler (filename
, Qfile_accessible_directory_p
);
3318 if (!NILP (handler
))
3319 return call2 (handler
, Qfile_accessible_directory_p
, filename
);
3322 tem
= (NILP (Ffile_directory_p (filename
))
3323 || NILP (Ffile_executable_p (filename
)));
3325 return tem
? Qnil
: Qt
;
3328 DEFUN ("file-regular-p", Ffile_regular_p
, Sfile_regular_p
, 1, 1, 0,
3329 doc
: /* Return t if file FILENAME is the name of a regular file.
3330 This is the sort of file that holds an ordinary stream of data bytes. */)
3332 Lisp_Object filename
;
3334 register Lisp_Object absname
;
3336 Lisp_Object handler
;
3338 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3340 /* If the file name has special constructs in it,
3341 call the corresponding file handler. */
3342 handler
= Ffind_file_name_handler (absname
, Qfile_regular_p
);
3343 if (!NILP (handler
))
3344 return call2 (handler
, Qfile_regular_p
, absname
);
3346 absname
= ENCODE_FILE (absname
);
3351 Lisp_Object tem
= Vw32_get_true_file_attributes
;
3353 /* Tell stat to use expensive method to get accurate info. */
3354 Vw32_get_true_file_attributes
= Qt
;
3355 result
= stat (SDATA (absname
), &st
);
3356 Vw32_get_true_file_attributes
= tem
;
3360 return (st
.st_mode
& S_IFMT
) == S_IFREG
? Qt
: Qnil
;
3363 if (stat (SDATA (absname
), &st
) < 0)
3365 return (st
.st_mode
& S_IFMT
) == S_IFREG
? Qt
: Qnil
;
3369 DEFUN ("file-modes", Ffile_modes
, Sfile_modes
, 1, 1, 0,
3370 doc
: /* Return mode bits of file named FILENAME, as an integer.
3371 Return nil, if file does not exist or is not accessible. */)
3373 Lisp_Object filename
;
3375 Lisp_Object absname
;
3377 Lisp_Object handler
;
3379 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3381 /* If the file name has special constructs in it,
3382 call the corresponding file handler. */
3383 handler
= Ffind_file_name_handler (absname
, Qfile_modes
);
3384 if (!NILP (handler
))
3385 return call2 (handler
, Qfile_modes
, absname
);
3387 absname
= ENCODE_FILE (absname
);
3389 if (stat (SDATA (absname
), &st
) < 0)
3391 #if defined (MSDOS) && __DJGPP__ < 2
3392 if (check_executable (SDATA (absname
)))
3393 st
.st_mode
|= S_IEXEC
;
3394 #endif /* MSDOS && __DJGPP__ < 2 */
3396 return make_number (st
.st_mode
& 07777);
3399 DEFUN ("set-file-modes", Fset_file_modes
, Sset_file_modes
, 2, 2, 0,
3400 doc
: /* Set mode bits of file named FILENAME to MODE (an integer).
3401 Only the 12 low bits of MODE are used. */)
3403 Lisp_Object filename
, mode
;
3405 Lisp_Object absname
, encoded_absname
;
3406 Lisp_Object handler
;
3408 absname
= Fexpand_file_name (filename
, current_buffer
->directory
);
3409 CHECK_NUMBER (mode
);
3411 /* If the file name has special constructs in it,
3412 call the corresponding file handler. */
3413 handler
= Ffind_file_name_handler (absname
, Qset_file_modes
);
3414 if (!NILP (handler
))
3415 return call3 (handler
, Qset_file_modes
, absname
, mode
);
3417 encoded_absname
= ENCODE_FILE (absname
);
3419 if (chmod (SDATA (encoded_absname
), XINT (mode
)) < 0)
3420 report_file_error ("Doing chmod", Fcons (absname
, Qnil
));
3425 DEFUN ("set-default-file-modes", Fset_default_file_modes
, Sset_default_file_modes
, 1, 1, 0,
3426 doc
: /* Set the file permission bits for newly created files.
3427 The argument MODE should be an integer; only the low 9 bits are used.
3428 This setting is inherited by subprocesses. */)
3432 CHECK_NUMBER (mode
);
3434 umask ((~ XINT (mode
)) & 0777);
3439 DEFUN ("default-file-modes", Fdefault_file_modes
, Sdefault_file_modes
, 0, 0, 0,
3440 doc
: /* Return the default file protection for created files.
3441 The value is an integer. */)
3447 realmask
= umask (0);
3450 XSETINT (value
, (~ realmask
) & 0777);
3454 extern int lisp_time_argument
P_ ((Lisp_Object
, time_t *, int *));
3456 DEFUN ("set-file-times", Fset_file_times
, Sset_file_times
, 1, 2, 0,
3457 doc
: /* Set times of file FILENAME to TIME.
3458 Set both access and modification times.
3459 Return t on success, else nil.
3460 Use the current time if TIME is nil. TIME is in the format of
3463 Lisp_Object filename
, time
;
3465 Lisp_Object absname
, encoded_absname
;
3466 Lisp_Object handler
;
3470 if (! lisp_time_argument (time
, &sec
, &usec
))
3471 error ("Invalid time specification");
3473 absname
= Fexpand_file_name (filename
, current_buffer
->directory
);
3475 /* If the file name has special constructs in it,
3476 call the corresponding file handler. */
3477 handler
= Ffind_file_name_handler (absname
, Qset_file_times
);
3478 if (!NILP (handler
))
3479 return call3 (handler
, Qset_file_times
, absname
, time
);
3481 encoded_absname
= ENCODE_FILE (absname
);
3486 EMACS_SET_SECS (t
, sec
);
3487 EMACS_SET_USECS (t
, usec
);
3489 if (set_file_times (SDATA (encoded_absname
), t
, t
))
3494 /* Setting times on a directory always fails. */
3495 if (stat (SDATA (encoded_absname
), &st
) == 0
3496 && (st
.st_mode
& S_IFMT
) == S_IFDIR
)
3499 report_file_error ("Setting file times", Fcons (absname
, Qnil
));
3512 DEFUN ("unix-sync", Funix_sync
, Sunix_sync
, 0, 0, "",
3513 doc
: /* Tell Unix to finish all pending disk updates. */)
3522 DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p
, Sfile_newer_than_file_p
, 2, 2, 0,
3523 doc
: /* Return t if file FILE1 is newer than file FILE2.
3524 If FILE1 does not exist, the answer is nil;
3525 otherwise, if FILE2 does not exist, the answer is t. */)
3527 Lisp_Object file1
, file2
;
3529 Lisp_Object absname1
, absname2
;
3532 Lisp_Object handler
;
3533 struct gcpro gcpro1
, gcpro2
;
3535 CHECK_STRING (file1
);
3536 CHECK_STRING (file2
);
3539 GCPRO2 (absname1
, file2
);
3540 absname1
= expand_and_dir_to_file (file1
, current_buffer
->directory
);
3541 absname2
= expand_and_dir_to_file (file2
, current_buffer
->directory
);
3544 /* If the file name has special constructs in it,
3545 call the corresponding file handler. */
3546 handler
= Ffind_file_name_handler (absname1
, Qfile_newer_than_file_p
);
3548 handler
= Ffind_file_name_handler (absname2
, Qfile_newer_than_file_p
);
3549 if (!NILP (handler
))
3550 return call3 (handler
, Qfile_newer_than_file_p
, absname1
, absname2
);
3552 GCPRO2 (absname1
, absname2
);
3553 absname1
= ENCODE_FILE (absname1
);
3554 absname2
= ENCODE_FILE (absname2
);
3557 if (stat (SDATA (absname1
), &st
) < 0)
3560 mtime1
= st
.st_mtime
;
3562 if (stat (SDATA (absname2
), &st
) < 0)
3565 return (mtime1
> st
.st_mtime
) ? Qt
: Qnil
;
3569 Lisp_Object Qfind_buffer_file_type
;
3572 #ifndef READ_BUF_SIZE
3573 #define READ_BUF_SIZE (64 << 10)
3576 extern void adjust_markers_for_delete
P_ ((int, int, int, int));
3578 /* This function is called after Lisp functions to decide a coding
3579 system are called, or when they cause an error. Before they are
3580 called, the current buffer is set unibyte and it contains only a
3581 newly inserted text (thus the buffer was empty before the
3584 The functions may set markers, overlays, text properties, or even
3585 alter the buffer contents, change the current buffer.
3587 Here, we reset all those changes by:
3588 o set back the current buffer.
3589 o move all markers and overlays to BEG.
3590 o remove all text properties.
3591 o set back the buffer multibyteness. */
3594 decide_coding_unwind (unwind_data
)
3595 Lisp_Object unwind_data
;
3597 Lisp_Object multibyte
, undo_list
, buffer
;
3599 multibyte
= XCAR (unwind_data
);
3600 unwind_data
= XCDR (unwind_data
);
3601 undo_list
= XCAR (unwind_data
);
3602 buffer
= XCDR (unwind_data
);
3604 if (current_buffer
!= XBUFFER (buffer
))
3605 set_buffer_internal (XBUFFER (buffer
));
3606 adjust_markers_for_delete (BEG
, BEG_BYTE
, Z
, Z_BYTE
);
3607 adjust_overlays_for_delete (BEG
, Z
- BEG
);
3608 BUF_INTERVALS (current_buffer
) = 0;
3609 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
3611 /* Now we are safe to change the buffer's multibyteness directly. */
3612 current_buffer
->enable_multibyte_characters
= multibyte
;
3613 current_buffer
->undo_list
= undo_list
;
3619 /* Used to pass values from insert-file-contents to read_non_regular. */
3621 static int non_regular_fd
;
3622 static int non_regular_inserted
;
3623 static int non_regular_nbytes
;
3626 /* Read from a non-regular file.
3627 Read non_regular_trytry bytes max from non_regular_fd.
3628 Non_regular_inserted specifies where to put the read bytes.
3629 Value is the number of bytes read. */
3638 nbytes
= emacs_read (non_regular_fd
,
3639 BEG_ADDR
+ PT_BYTE
- BEG_BYTE
+ non_regular_inserted
,
3640 non_regular_nbytes
);
3642 return make_number (nbytes
);
3646 /* Condition-case handler used when reading from non-regular files
3647 in insert-file-contents. */
3650 read_non_regular_quit ()
3656 DEFUN ("insert-file-contents", Finsert_file_contents
, Sinsert_file_contents
,
3658 doc
: /* Insert contents of file FILENAME after point.
3659 Returns list of absolute file name and number of characters inserted.
3660 If second argument VISIT is non-nil, the buffer's visited filename
3661 and last save file modtime are set, and it is marked unmodified.
3662 If visiting and the file does not exist, visiting is completed
3663 before the error is signaled.
3664 The optional third and fourth arguments BEG and END
3665 specify what portion of the file to insert.
3666 These arguments count bytes in the file, not characters in the buffer.
3667 If VISIT is non-nil, BEG and END must be nil.
3669 If optional fifth argument REPLACE is non-nil,
3670 it means replace the current buffer contents (in the accessible portion)
3671 with the file contents. This is better than simply deleting and inserting
3672 the whole thing because (1) it preserves some marker positions
3673 and (2) it puts less data in the undo list.
3674 When REPLACE is non-nil, the value is the number of characters actually read,
3675 which is often less than the number of characters to be read.
3677 This does code conversion according to the value of
3678 `coding-system-for-read' or `file-coding-system-alist',
3679 and sets the variable `last-coding-system-used' to the coding system
3681 (filename
, visit
, beg
, end
, replace
)
3682 Lisp_Object filename
, visit
, beg
, end
, replace
;
3687 register int how_much
;
3688 register int unprocessed
;
3689 int count
= SPECPDL_INDEX ();
3690 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3691 Lisp_Object handler
, val
, insval
, orig_filename
;
3694 int not_regular
= 0;
3695 unsigned char read_buf
[READ_BUF_SIZE
];
3696 struct coding_system coding
;
3697 unsigned char buffer
[1 << 14];
3698 int replace_handled
= 0;
3699 int set_coding_system
= 0;
3700 int coding_system_decided
= 0;
3703 if (current_buffer
->base_buffer
&& ! NILP (visit
))
3704 error ("Cannot do file visiting in an indirect buffer");
3706 if (!NILP (current_buffer
->read_only
))
3707 Fbarf_if_buffer_read_only ();
3711 orig_filename
= Qnil
;
3713 GCPRO4 (filename
, val
, p
, orig_filename
);
3715 CHECK_STRING (filename
);
3716 filename
= Fexpand_file_name (filename
, Qnil
);
3718 /* If the file name has special constructs in it,
3719 call the corresponding file handler. */
3720 handler
= Ffind_file_name_handler (filename
, Qinsert_file_contents
);
3721 if (!NILP (handler
))
3723 val
= call6 (handler
, Qinsert_file_contents
, filename
,
3724 visit
, beg
, end
, replace
);
3725 if (CONSP (val
) && CONSP (XCDR (val
)))
3726 inserted
= XINT (XCAR (XCDR (val
)));
3730 orig_filename
= filename
;
3731 filename
= ENCODE_FILE (filename
);
3737 Lisp_Object tem
= Vw32_get_true_file_attributes
;
3739 /* Tell stat to use expensive method to get accurate info. */
3740 Vw32_get_true_file_attributes
= Qt
;
3741 total
= stat (SDATA (filename
), &st
);
3742 Vw32_get_true_file_attributes
= tem
;
3747 if (stat (SDATA (filename
), &st
) < 0)
3749 if ((fd
= emacs_open (SDATA (filename
), O_RDONLY
, 0)) < 0
3750 || fstat (fd
, &st
) < 0)
3751 #endif /* not APOLLO */
3752 #endif /* WINDOWSNT */
3754 if (fd
>= 0) emacs_close (fd
);
3757 report_file_error ("Opening input file", Fcons (orig_filename
, Qnil
));
3760 if (!NILP (Vcoding_system_for_read
))
3761 Fset (Qbuffer_file_coding_system
, Vcoding_system_for_read
);
3766 /* This code will need to be changed in order to work on named
3767 pipes, and it's probably just not worth it. So we should at
3768 least signal an error. */
3769 if (!S_ISREG (st
.st_mode
))
3776 if (! NILP (replace
) || ! NILP (beg
) || ! NILP (end
))
3777 Fsignal (Qfile_error
,
3778 Fcons (build_string ("not a regular file"),
3779 Fcons (orig_filename
, Qnil
)));
3784 if ((fd
= emacs_open (SDATA (filename
), O_RDONLY
, 0)) < 0)
3787 /* Replacement should preserve point as it preserves markers. */
3788 if (!NILP (replace
))
3789 record_unwind_protect (restore_point_unwind
, Fpoint_marker ());
3791 record_unwind_protect (close_file_unwind
, make_number (fd
));
3793 /* Supposedly happens on VMS. */
3794 /* Can happen on any platform that uses long as type of off_t, but allows
3795 file sizes to exceed 2Gb. VMS is no longer officially supported, so
3796 give a message suitable for the latter case. */
3797 if (! not_regular
&& st
.st_size
< 0)
3798 error ("Maximum buffer size exceeded");
3800 /* Prevent redisplay optimizations. */
3801 current_buffer
->clip_changed
= 1;
3805 if (!NILP (beg
) || !NILP (end
))
3806 error ("Attempt to visit less than an entire file");
3807 if (BEG
< Z
&& NILP (replace
))
3808 error ("Cannot do file visiting in a non-empty buffer");
3814 XSETFASTINT (beg
, 0);
3822 XSETINT (end
, st
.st_size
);
3824 /* Arithmetic overflow can occur if an Emacs integer cannot
3825 represent the file size, or if the calculations below
3826 overflow. The calculations below double the file size
3827 twice, so check that it can be multiplied by 4 safely. */
3828 if (XINT (end
) != st
.st_size
3829 || ((int) st
.st_size
* 4) / 4 != st
.st_size
)
3830 error ("Maximum buffer size exceeded");
3832 /* The file size returned from stat may be zero, but data
3833 may be readable nonetheless, for example when this is a
3834 file in the /proc filesystem. */
3835 if (st
.st_size
== 0)
3836 XSETINT (end
, READ_BUF_SIZE
);
3840 if (EQ (Vcoding_system_for_read
, Qauto_save_coding
))
3842 /* We use emacs-mule for auto saving... */
3843 setup_coding_system (Qemacs_mule
, &coding
);
3844 /* ... but with the special flag to indicate to read in a
3845 multibyte sequence for eight-bit-control char as is. */
3847 coding
.src_multibyte
= 0;
3848 coding
.dst_multibyte
3849 = !NILP (current_buffer
->enable_multibyte_characters
);
3850 coding
.eol_type
= CODING_EOL_LF
;
3851 coding_system_decided
= 1;
3855 /* Decide the coding system to use for reading the file now
3856 because we can't use an optimized method for handling
3857 `coding:' tag if the current buffer is not empty. */
3861 if (!NILP (Vcoding_system_for_read
))
3862 val
= Vcoding_system_for_read
;
3863 else if (! NILP (replace
))
3864 /* In REPLACE mode, we can use the same coding system
3865 that was used to visit the file. */
3866 val
= current_buffer
->buffer_file_coding_system
;
3869 /* Don't try looking inside a file for a coding system
3870 specification if it is not seekable. */
3871 if (! not_regular
&& ! NILP (Vset_auto_coding_function
))
3873 /* Find a coding system specified in the heading two
3874 lines or in the tailing several lines of the file.
3875 We assume that the 1K-byte and 3K-byte for heading
3876 and tailing respectively are sufficient for this
3880 if (st
.st_size
<= (1024 * 4))
3881 nread
= emacs_read (fd
, read_buf
, 1024 * 4);
3884 nread
= emacs_read (fd
, read_buf
, 1024);
3887 if (lseek (fd
, st
.st_size
- (1024 * 3), 0) < 0)
3888 report_file_error ("Setting file position",
3889 Fcons (orig_filename
, Qnil
));
3890 nread
+= emacs_read (fd
, read_buf
+ nread
, 1024 * 3);
3895 error ("IO error reading %s: %s",
3896 SDATA (orig_filename
), emacs_strerror (errno
));
3899 struct buffer
*prev
= current_buffer
;
3903 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
3905 buffer
= Fget_buffer_create (build_string (" *code-converting-work*"));
3906 buf
= XBUFFER (buffer
);
3908 delete_all_overlays (buf
);
3909 buf
->directory
= current_buffer
->directory
;
3910 buf
->read_only
= Qnil
;
3911 buf
->filename
= Qnil
;
3912 buf
->undo_list
= Qt
;
3913 eassert (buf
->overlays_before
== NULL
);
3914 eassert (buf
->overlays_after
== NULL
);
3916 set_buffer_internal (buf
);
3918 buf
->enable_multibyte_characters
= Qnil
;
3920 insert_1_both (read_buf
, nread
, nread
, 0, 0, 0);
3921 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
3922 val
= call2 (Vset_auto_coding_function
,
3923 filename
, make_number (nread
));
3924 set_buffer_internal (prev
);
3926 /* Discard the unwind protect for recovering the
3930 /* Rewind the file for the actual read done later. */
3931 if (lseek (fd
, 0, 0) < 0)
3932 report_file_error ("Setting file position",
3933 Fcons (orig_filename
, Qnil
));
3939 /* If we have not yet decided a coding system, check
3940 file-coding-system-alist. */
3941 Lisp_Object args
[6], coding_systems
;
3943 args
[0] = Qinsert_file_contents
, args
[1] = orig_filename
;
3944 args
[2] = visit
, args
[3] = beg
, args
[4] = end
, args
[5] = replace
;
3945 coding_systems
= Ffind_operation_coding_system (6, args
);
3946 if (CONSP (coding_systems
))
3947 val
= XCAR (coding_systems
);
3951 setup_coding_system (Fcheck_coding_system (val
), &coding
);
3952 /* Ensure we set Vlast_coding_system_used. */
3953 set_coding_system
= 1;
3955 if (NILP (current_buffer
->enable_multibyte_characters
)
3957 /* We must suppress all character code conversion except for
3958 end-of-line conversion. */
3959 setup_raw_text_coding_system (&coding
);
3961 coding
.src_multibyte
= 0;
3962 coding
.dst_multibyte
3963 = !NILP (current_buffer
->enable_multibyte_characters
);
3964 coding_system_decided
= 1;
3967 /* If requested, replace the accessible part of the buffer
3968 with the file contents. Avoid replacing text at the
3969 beginning or end of the buffer that matches the file contents;
3970 that preserves markers pointing to the unchanged parts.
3972 Here we implement this feature in an optimized way
3973 for the case where code conversion is NOT needed.
3974 The following if-statement handles the case of conversion
3975 in a less optimal way.
3977 If the code conversion is "automatic" then we try using this
3978 method and hope for the best.
3979 But if we discover the need for conversion, we give up on this method
3980 and let the following if-statement handle the replace job. */
3983 && !(coding
.common_flags
& CODING_REQUIRE_DECODING_MASK
))
3985 /* same_at_start and same_at_end count bytes,
3986 because file access counts bytes
3987 and BEG and END count bytes. */
3988 int same_at_start
= BEGV_BYTE
;
3989 int same_at_end
= ZV_BYTE
;
3991 /* There is still a possibility we will find the need to do code
3992 conversion. If that happens, we set this variable to 1 to
3993 give up on handling REPLACE in the optimized way. */
3994 int giveup_match_end
= 0;
3996 if (XINT (beg
) != 0)
3998 if (lseek (fd
, XINT (beg
), 0) < 0)
3999 report_file_error ("Setting file position",
4000 Fcons (orig_filename
, Qnil
));
4005 /* Count how many chars at the start of the file
4006 match the text at the beginning of the buffer. */
4011 nread
= emacs_read (fd
, buffer
, sizeof buffer
);
4013 error ("IO error reading %s: %s",
4014 SDATA (orig_filename
), emacs_strerror (errno
));
4015 else if (nread
== 0)
4018 if (coding
.type
== coding_type_undecided
)
4019 detect_coding (&coding
, buffer
, nread
);
4020 if (coding
.common_flags
& CODING_REQUIRE_DECODING_MASK
)
4021 /* We found that the file should be decoded somehow.
4022 Let's give up here. */
4024 giveup_match_end
= 1;
4028 if (coding
.eol_type
== CODING_EOL_UNDECIDED
)
4029 detect_eol (&coding
, buffer
, nread
);
4030 if (coding
.eol_type
!= CODING_EOL_UNDECIDED
4031 && coding
.eol_type
!= CODING_EOL_LF
)
4032 /* We found that the format of eol should be decoded.
4033 Let's give up here. */
4035 giveup_match_end
= 1;
4040 while (bufpos
< nread
&& same_at_start
< ZV_BYTE
4041 && FETCH_BYTE (same_at_start
) == buffer
[bufpos
])
4042 same_at_start
++, bufpos
++;
4043 /* If we found a discrepancy, stop the scan.
4044 Otherwise loop around and scan the next bufferful. */
4045 if (bufpos
!= nread
)
4049 /* If the file matches the buffer completely,
4050 there's no need to replace anything. */
4051 if (same_at_start
- BEGV_BYTE
== XINT (end
))
4055 /* Truncate the buffer to the size of the file. */
4056 del_range_1 (same_at_start
, same_at_end
, 0, 0);
4061 /* Count how many chars at the end of the file
4062 match the text at the end of the buffer. But, if we have
4063 already found that decoding is necessary, don't waste time. */
4064 while (!giveup_match_end
)
4066 int total_read
, nread
, bufpos
, curpos
, trial
;
4068 /* At what file position are we now scanning? */
4069 curpos
= XINT (end
) - (ZV_BYTE
- same_at_end
);
4070 /* If the entire file matches the buffer tail, stop the scan. */
4073 /* How much can we scan in the next step? */
4074 trial
= min (curpos
, sizeof buffer
);
4075 if (lseek (fd
, curpos
- trial
, 0) < 0)
4076 report_file_error ("Setting file position",
4077 Fcons (orig_filename
, Qnil
));
4079 total_read
= nread
= 0;
4080 while (total_read
< trial
)
4082 nread
= emacs_read (fd
, buffer
+ total_read
, trial
- total_read
);
4084 error ("IO error reading %s: %s",
4085 SDATA (orig_filename
), emacs_strerror (errno
));
4086 else if (nread
== 0)
4088 total_read
+= nread
;
4091 /* Scan this bufferful from the end, comparing with
4092 the Emacs buffer. */
4093 bufpos
= total_read
;
4095 /* Compare with same_at_start to avoid counting some buffer text
4096 as matching both at the file's beginning and at the end. */
4097 while (bufpos
> 0 && same_at_end
> same_at_start
4098 && FETCH_BYTE (same_at_end
- 1) == buffer
[bufpos
- 1])
4099 same_at_end
--, bufpos
--;
4101 /* If we found a discrepancy, stop the scan.
4102 Otherwise loop around and scan the preceding bufferful. */
4105 /* If this discrepancy is because of code conversion,
4106 we cannot use this method; giveup and try the other. */
4107 if (same_at_end
> same_at_start
4108 && FETCH_BYTE (same_at_end
- 1) >= 0200
4109 && ! NILP (current_buffer
->enable_multibyte_characters
)
4110 && (CODING_MAY_REQUIRE_DECODING (&coding
)))
4111 giveup_match_end
= 1;
4120 if (! giveup_match_end
)
4124 /* We win! We can handle REPLACE the optimized way. */
4126 /* Extend the start of non-matching text area to multibyte
4127 character boundary. */
4128 if (! NILP (current_buffer
->enable_multibyte_characters
))
4129 while (same_at_start
> BEGV_BYTE
4130 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start
)))
4133 /* Extend the end of non-matching text area to multibyte
4134 character boundary. */
4135 if (! NILP (current_buffer
->enable_multibyte_characters
))
4136 while (same_at_end
< ZV_BYTE
4137 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end
)))
4140 /* Don't try to reuse the same piece of text twice. */
4141 overlap
= (same_at_start
- BEGV_BYTE
4142 - (same_at_end
+ st
.st_size
- ZV
));
4144 same_at_end
+= overlap
;
4146 /* Arrange to read only the nonmatching middle part of the file. */
4147 XSETFASTINT (beg
, XINT (beg
) + (same_at_start
- BEGV_BYTE
));
4148 XSETFASTINT (end
, XINT (end
) - (ZV_BYTE
- same_at_end
));
4150 del_range_byte (same_at_start
, same_at_end
, 0);
4151 /* Insert from the file at the proper position. */
4152 temp
= BYTE_TO_CHAR (same_at_start
);
4153 SET_PT_BOTH (temp
, same_at_start
);
4155 /* If display currently starts at beginning of line,
4156 keep it that way. */
4157 if (XBUFFER (XWINDOW (selected_window
)->buffer
) == current_buffer
)
4158 XWINDOW (selected_window
)->start_at_line_beg
= Fbolp ();
4160 replace_handled
= 1;
4164 /* If requested, replace the accessible part of the buffer
4165 with the file contents. Avoid replacing text at the
4166 beginning or end of the buffer that matches the file contents;
4167 that preserves markers pointing to the unchanged parts.
4169 Here we implement this feature for the case where code conversion
4170 is needed, in a simple way that needs a lot of memory.
4171 The preceding if-statement handles the case of no conversion
4172 in a more optimized way. */
4173 if (!NILP (replace
) && ! replace_handled
&& BEGV
< ZV
)
4175 int same_at_start
= BEGV_BYTE
;
4176 int same_at_end
= ZV_BYTE
;
4179 /* Make sure that the gap is large enough. */
4180 int bufsize
= 2 * st
.st_size
;
4181 unsigned char *conversion_buffer
= (unsigned char *) xmalloc (bufsize
);
4184 /* First read the whole file, performing code conversion into
4185 CONVERSION_BUFFER. */
4187 if (lseek (fd
, XINT (beg
), 0) < 0)
4189 xfree (conversion_buffer
);
4190 report_file_error ("Setting file position",
4191 Fcons (orig_filename
, Qnil
));
4194 total
= st
.st_size
; /* Total bytes in the file. */
4195 how_much
= 0; /* Bytes read from file so far. */
4196 inserted
= 0; /* Bytes put into CONVERSION_BUFFER so far. */
4197 unprocessed
= 0; /* Bytes not processed in previous loop. */
4199 while (how_much
< total
)
4201 /* try is reserved in some compilers (Microsoft C) */
4202 int trytry
= min (total
- how_much
, READ_BUF_SIZE
- unprocessed
);
4203 unsigned char *destination
= read_buf
+ unprocessed
;
4206 /* Allow quitting out of the actual I/O. */
4209 this = emacs_read (fd
, destination
, trytry
);
4212 if (this < 0 || this + unprocessed
== 0)
4220 if (CODING_MAY_REQUIRE_DECODING (&coding
))
4222 int require
, result
;
4224 this += unprocessed
;
4226 /* If we are using more space than estimated,
4227 make CONVERSION_BUFFER bigger. */
4228 require
= decoding_buffer_size (&coding
, this);
4229 if (inserted
+ require
+ 2 * (total
- how_much
) > bufsize
)
4231 bufsize
= inserted
+ require
+ 2 * (total
- how_much
);
4232 conversion_buffer
= (unsigned char *) xrealloc (conversion_buffer
, bufsize
);
4235 /* Convert this batch with results in CONVERSION_BUFFER. */
4236 if (how_much
>= total
) /* This is the last block. */
4237 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
4238 if (coding
.composing
!= COMPOSITION_DISABLED
)
4239 coding_allocate_composition_data (&coding
, BEGV
);
4240 result
= decode_coding (&coding
, read_buf
,
4241 conversion_buffer
+ inserted
,
4242 this, bufsize
- inserted
);
4244 /* Save for next iteration whatever we didn't convert. */
4245 unprocessed
= this - coding
.consumed
;
4246 bcopy (read_buf
+ coding
.consumed
, read_buf
, unprocessed
);
4247 if (!NILP (current_buffer
->enable_multibyte_characters
))
4248 this = coding
.produced
;
4250 this = str_as_unibyte (conversion_buffer
+ inserted
,
4257 /* At this point, INSERTED is how many characters (i.e. bytes)
4258 are present in CONVERSION_BUFFER.
4259 HOW_MUCH should equal TOTAL,
4260 or should be <= 0 if we couldn't read the file. */
4264 xfree (conversion_buffer
);
4265 coding_free_composition_data (&coding
);
4267 error ("IO error reading %s: %s",
4268 SDATA (orig_filename
), emacs_strerror (errno
));
4269 else if (how_much
== -2)
4270 error ("maximum buffer size exceeded");
4273 /* Compare the beginning of the converted file
4274 with the buffer text. */
4277 while (bufpos
< inserted
&& same_at_start
< same_at_end
4278 && FETCH_BYTE (same_at_start
) == conversion_buffer
[bufpos
])
4279 same_at_start
++, bufpos
++;
4281 /* If the file matches the buffer completely,
4282 there's no need to replace anything. */
4284 if (bufpos
== inserted
)
4286 xfree (conversion_buffer
);
4287 coding_free_composition_data (&coding
);
4290 /* Truncate the buffer to the size of the file. */
4291 del_range_byte (same_at_start
, same_at_end
, 0);
4296 /* Extend the start of non-matching text area to multibyte
4297 character boundary. */
4298 if (! NILP (current_buffer
->enable_multibyte_characters
))
4299 while (same_at_start
> BEGV_BYTE
4300 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start
)))
4303 /* Scan this bufferful from the end, comparing with
4304 the Emacs buffer. */
4307 /* Compare with same_at_start to avoid counting some buffer text
4308 as matching both at the file's beginning and at the end. */
4309 while (bufpos
> 0 && same_at_end
> same_at_start
4310 && FETCH_BYTE (same_at_end
- 1) == conversion_buffer
[bufpos
- 1])
4311 same_at_end
--, bufpos
--;
4313 /* Extend the end of non-matching text area to multibyte
4314 character boundary. */
4315 if (! NILP (current_buffer
->enable_multibyte_characters
))
4316 while (same_at_end
< ZV_BYTE
4317 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end
)))
4320 /* Don't try to reuse the same piece of text twice. */
4321 overlap
= same_at_start
- BEGV_BYTE
- (same_at_end
+ inserted
- ZV_BYTE
);
4323 same_at_end
+= overlap
;
4325 /* If display currently starts at beginning of line,
4326 keep it that way. */
4327 if (XBUFFER (XWINDOW (selected_window
)->buffer
) == current_buffer
)
4328 XWINDOW (selected_window
)->start_at_line_beg
= Fbolp ();
4330 /* Replace the chars that we need to replace,
4331 and update INSERTED to equal the number of bytes
4332 we are taking from the file. */
4333 inserted
-= (ZV_BYTE
- same_at_end
) + (same_at_start
- BEGV_BYTE
);
4335 if (same_at_end
!= same_at_start
)
4337 del_range_byte (same_at_start
, same_at_end
, 0);
4339 same_at_start
= GPT_BYTE
;
4343 temp
= BYTE_TO_CHAR (same_at_start
);
4345 /* Insert from the file at the proper position. */
4346 SET_PT_BOTH (temp
, same_at_start
);
4347 insert_1 (conversion_buffer
+ same_at_start
- BEGV_BYTE
, inserted
,
4349 if (coding
.cmp_data
&& coding
.cmp_data
->used
)
4350 coding_restore_composition (&coding
, Fcurrent_buffer ());
4351 coding_free_composition_data (&coding
);
4353 /* Set `inserted' to the number of inserted characters. */
4354 inserted
= PT
- temp
;
4356 xfree (conversion_buffer
);
4365 register Lisp_Object temp
;
4367 total
= XINT (end
) - XINT (beg
);
4369 /* Make sure point-max won't overflow after this insertion. */
4370 XSETINT (temp
, total
);
4371 if (total
!= XINT (temp
))
4372 error ("Maximum buffer size exceeded");
4375 /* For a special file, all we can do is guess. */
4376 total
= READ_BUF_SIZE
;
4378 if (NILP (visit
) && total
> 0)
4379 prepare_to_modify_buffer (PT
, PT
, NULL
);
4382 if (GAP_SIZE
< total
)
4383 make_gap (total
- GAP_SIZE
);
4385 if (XINT (beg
) != 0 || !NILP (replace
))
4387 if (lseek (fd
, XINT (beg
), 0) < 0)
4388 report_file_error ("Setting file position",
4389 Fcons (orig_filename
, Qnil
));
4392 /* In the following loop, HOW_MUCH contains the total bytes read so
4393 far for a regular file, and not changed for a special file. But,
4394 before exiting the loop, it is set to a negative value if I/O
4398 /* Total bytes inserted. */
4401 /* Here, we don't do code conversion in the loop. It is done by
4402 code_convert_region after all data are read into the buffer. */
4404 int gap_size
= GAP_SIZE
;
4406 while (how_much
< total
)
4408 /* try is reserved in some compilers (Microsoft C) */
4409 int trytry
= min (total
- how_much
, READ_BUF_SIZE
);
4416 /* Maybe make more room. */
4417 if (gap_size
< trytry
)
4419 make_gap (total
- gap_size
);
4420 gap_size
= GAP_SIZE
;
4423 /* Read from the file, capturing `quit'. When an
4424 error occurs, end the loop, and arrange for a quit
4425 to be signaled after decoding the text we read. */
4426 non_regular_fd
= fd
;
4427 non_regular_inserted
= inserted
;
4428 non_regular_nbytes
= trytry
;
4429 val
= internal_condition_case_1 (read_non_regular
, Qnil
, Qerror
,
4430 read_non_regular_quit
);
4441 /* Allow quitting out of the actual I/O. We don't make text
4442 part of the buffer until all the reading is done, so a C-g
4443 here doesn't do any harm. */
4446 this = emacs_read (fd
, BEG_ADDR
+ PT_BYTE
- BEG_BYTE
+ inserted
, trytry
);
4458 /* For a regular file, where TOTAL is the real size,
4459 count HOW_MUCH to compare with it.
4460 For a special file, where TOTAL is just a buffer size,
4461 so don't bother counting in HOW_MUCH.
4462 (INSERTED is where we count the number of characters inserted.) */
4469 /* Make the text read part of the buffer. */
4470 GAP_SIZE
-= inserted
;
4472 GPT_BYTE
+= inserted
;
4474 ZV_BYTE
+= inserted
;
4479 /* Put an anchor to ensure multi-byte form ends at gap. */
4484 /* Discard the unwind protect for closing the file. */
4488 error ("IO error reading %s: %s",
4489 SDATA (orig_filename
), emacs_strerror (errno
));
4493 if (! coding_system_decided
)
4495 /* The coding system is not yet decided. Decide it by an
4496 optimized method for handling `coding:' tag.
4498 Note that we can get here only if the buffer was empty
4499 before the insertion. */
4503 if (!NILP (Vcoding_system_for_read
))
4504 val
= Vcoding_system_for_read
;
4507 /* Since we are sure that the current buffer was empty
4508 before the insertion, we can toggle
4509 enable-multibyte-characters directly here without taking
4510 care of marker adjustment and byte combining problem. By
4511 this way, we can run Lisp program safely before decoding
4512 the inserted text. */
4513 Lisp_Object unwind_data
;
4514 int count
= SPECPDL_INDEX ();
4516 unwind_data
= Fcons (current_buffer
->enable_multibyte_characters
,
4517 Fcons (current_buffer
->undo_list
,
4518 Fcurrent_buffer ()));
4519 current_buffer
->enable_multibyte_characters
= Qnil
;
4520 current_buffer
->undo_list
= Qt
;
4521 record_unwind_protect (decide_coding_unwind
, unwind_data
);
4523 if (inserted
> 0 && ! NILP (Vset_auto_coding_function
))
4525 val
= call2 (Vset_auto_coding_function
,
4526 filename
, make_number (inserted
));
4531 /* If the coding system is not yet decided, check
4532 file-coding-system-alist. */
4533 Lisp_Object args
[6], coding_systems
;
4535 args
[0] = Qinsert_file_contents
, args
[1] = orig_filename
;
4536 args
[2] = visit
, args
[3] = beg
, args
[4] = end
, args
[5] = Qnil
;
4537 coding_systems
= Ffind_operation_coding_system (6, args
);
4538 if (CONSP (coding_systems
))
4539 val
= XCAR (coding_systems
);
4542 unbind_to (count
, Qnil
);
4543 inserted
= Z_BYTE
- BEG_BYTE
;
4546 /* The following kludgy code is to avoid some compiler bug.
4548 setup_coding_system (val, &coding);
4551 struct coding_system temp_coding
;
4552 setup_coding_system (val
, &temp_coding
);
4553 bcopy (&temp_coding
, &coding
, sizeof coding
);
4555 /* Ensure we set Vlast_coding_system_used. */
4556 set_coding_system
= 1;
4558 if (NILP (current_buffer
->enable_multibyte_characters
)
4560 /* We must suppress all character code conversion except for
4561 end-of-line conversion. */
4562 setup_raw_text_coding_system (&coding
);
4563 coding
.src_multibyte
= 0;
4564 coding
.dst_multibyte
4565 = !NILP (current_buffer
->enable_multibyte_characters
);
4569 /* Can't do this if part of the buffer might be preserved. */
4571 && (coding
.type
== coding_type_no_conversion
4572 || coding
.type
== coding_type_raw_text
))
4574 /* Visiting a file with these coding system makes the buffer
4576 current_buffer
->enable_multibyte_characters
= Qnil
;
4577 coding
.dst_multibyte
= 0;
4580 if (inserted
> 0 || coding
.type
== coding_type_ccl
)
4582 if (CODING_MAY_REQUIRE_DECODING (&coding
))
4584 code_convert_region (PT
, PT_BYTE
, PT
+ inserted
, PT_BYTE
+ inserted
,
4586 inserted
= coding
.produced_char
;
4589 adjust_after_insert (PT
, PT_BYTE
, PT
+ inserted
, PT_BYTE
+ inserted
,
4593 /* Now INSERTED is measured in characters. */
4596 /* Use the conversion type to determine buffer-file-type
4597 (find-buffer-file-type is now used to help determine the
4599 if ((coding
.eol_type
== CODING_EOL_UNDECIDED
4600 || coding
.eol_type
== CODING_EOL_LF
)
4601 && ! CODING_REQUIRE_DECODING (&coding
))
4602 current_buffer
->buffer_file_type
= Qt
;
4604 current_buffer
->buffer_file_type
= Qnil
;
4611 if (!EQ (current_buffer
->undo_list
, Qt
))
4612 current_buffer
->undo_list
= Qnil
;
4614 stat (SDATA (filename
), &st
);
4619 current_buffer
->modtime
= st
.st_mtime
;
4620 current_buffer
->filename
= orig_filename
;
4623 SAVE_MODIFF
= MODIFF
;
4624 current_buffer
->auto_save_modified
= MODIFF
;
4625 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
4626 #ifdef CLASH_DETECTION
4629 if (!NILP (current_buffer
->file_truename
))
4630 unlock_file (current_buffer
->file_truename
);
4631 unlock_file (filename
);
4633 #endif /* CLASH_DETECTION */
4635 Fsignal (Qfile_error
,
4636 Fcons (build_string ("not a regular file"),
4637 Fcons (orig_filename
, Qnil
)));
4640 if (set_coding_system
)
4641 Vlast_coding_system_used
= coding
.symbol
;
4643 if (! NILP (Ffboundp (Qafter_insert_file_set_coding
)))
4645 insval
= call1 (Qafter_insert_file_set_coding
, make_number (inserted
));
4646 if (! NILP (insval
))
4648 CHECK_NUMBER (insval
);
4649 inserted
= XFASTINT (insval
);
4653 /* Decode file format */
4656 int empty_undo_list_p
= 0;
4658 /* If we're anyway going to discard undo information, don't
4659 record it in the first place. The buffer's undo list at this
4660 point is either nil or t when visiting a file. */
4663 empty_undo_list_p
= NILP (current_buffer
->undo_list
);
4664 current_buffer
->undo_list
= Qt
;
4667 insval
= call3 (Qformat_decode
,
4668 Qnil
, make_number (inserted
), visit
);
4669 CHECK_NUMBER (insval
);
4670 inserted
= XFASTINT (insval
);
4673 current_buffer
->undo_list
= empty_undo_list_p
? Qnil
: Qt
;
4676 /* Call after-change hooks for the inserted text, aside from the case
4677 of normal visiting (not with REPLACE), which is done in a new buffer
4678 "before" the buffer is changed. */
4679 if (inserted
> 0 && total
> 0
4680 && (NILP (visit
) || !NILP (replace
)))
4682 signal_after_change (PT
, 0, inserted
);
4683 update_compositions (PT
, PT
, CHECK_BORDER
);
4686 p
= Vafter_insert_file_functions
;
4689 insval
= call1 (XCAR (p
), make_number (inserted
));
4692 CHECK_NUMBER (insval
);
4693 inserted
= XFASTINT (insval
);
4700 && current_buffer
->modtime
== -1)
4702 /* If visiting nonexistent file, return nil. */
4703 report_file_error ("Opening input file", Fcons (orig_filename
, Qnil
));
4707 Fsignal (Qquit
, Qnil
);
4709 /* ??? Retval needs to be dealt with in all cases consistently. */
4711 val
= Fcons (orig_filename
,
4712 Fcons (make_number (inserted
),
4715 RETURN_UNGCPRO (unbind_to (count
, val
));
4718 static Lisp_Object build_annotations
P_ ((Lisp_Object
, Lisp_Object
));
4719 static Lisp_Object build_annotations_2
P_ ((Lisp_Object
, Lisp_Object
,
4720 Lisp_Object
, Lisp_Object
));
4722 /* If build_annotations switched buffers, switch back to BUF.
4723 Kill the temporary buffer that was selected in the meantime.
4725 Since this kill only the last temporary buffer, some buffers remain
4726 not killed if build_annotations switched buffers more than once.
4730 build_annotations_unwind (buf
)
4735 if (XBUFFER (buf
) == current_buffer
)
4737 tembuf
= Fcurrent_buffer ();
4739 Fkill_buffer (tembuf
);
4743 /* Decide the coding-system to encode the data with. */
4746 choose_write_coding_system (start
, end
, filename
,
4747 append
, visit
, lockname
, coding
)
4748 Lisp_Object start
, end
, filename
, append
, visit
, lockname
;
4749 struct coding_system
*coding
;
4754 && NILP (Fstring_equal (current_buffer
->filename
,
4755 current_buffer
->auto_save_file_name
)))
4757 /* We use emacs-mule for auto saving... */
4758 setup_coding_system (Qemacs_mule
, coding
);
4759 /* ... but with the special flag to indicate not to strip off
4760 leading code of eight-bit-control chars. */
4762 goto done_setup_coding
;
4764 else if (!NILP (Vcoding_system_for_write
))
4766 val
= Vcoding_system_for_write
;
4767 if (coding_system_require_warning
4768 && !NILP (Ffboundp (Vselect_safe_coding_system_function
)))
4769 /* Confirm that VAL can surely encode the current region. */
4770 val
= call5 (Vselect_safe_coding_system_function
,
4771 start
, end
, Fcons (Qt
, Fcons (val
, Qnil
)),
4776 /* If the variable `buffer-file-coding-system' is set locally,
4777 it means that the file was read with some kind of code
4778 conversion or the variable is explicitly set by users. We
4779 had better write it out with the same coding system even if
4780 `enable-multibyte-characters' is nil.
4782 If it is not set locally, we anyway have to convert EOL
4783 format if the default value of `buffer-file-coding-system'
4784 tells that it is not Unix-like (LF only) format. */
4785 int using_default_coding
= 0;
4786 int force_raw_text
= 0;
4788 val
= current_buffer
->buffer_file_coding_system
;
4790 || NILP (Flocal_variable_p (Qbuffer_file_coding_system
, Qnil
)))
4793 if (NILP (current_buffer
->enable_multibyte_characters
))
4799 /* Check file-coding-system-alist. */
4800 Lisp_Object args
[7], coding_systems
;
4802 args
[0] = Qwrite_region
; args
[1] = start
; args
[2] = end
;
4803 args
[3] = filename
; args
[4] = append
; args
[5] = visit
;
4805 coding_systems
= Ffind_operation_coding_system (7, args
);
4806 if (CONSP (coding_systems
) && !NILP (XCDR (coding_systems
)))
4807 val
= XCDR (coding_systems
);
4811 && !NILP (current_buffer
->buffer_file_coding_system
))
4813 /* If we still have not decided a coding system, use the
4814 default value of buffer-file-coding-system. */
4815 val
= current_buffer
->buffer_file_coding_system
;
4816 using_default_coding
= 1;
4820 && !NILP (Ffboundp (Vselect_safe_coding_system_function
)))
4821 /* Confirm that VAL can surely encode the current region. */
4822 val
= call5 (Vselect_safe_coding_system_function
,
4823 start
, end
, val
, Qnil
, filename
);
4825 setup_coding_system (Fcheck_coding_system (val
), coding
);
4826 if (coding
->eol_type
== CODING_EOL_UNDECIDED
4827 && !using_default_coding
)
4829 if (! EQ (default_buffer_file_coding
.symbol
,
4830 buffer_defaults
.buffer_file_coding_system
))
4831 setup_coding_system (buffer_defaults
.buffer_file_coding_system
,
4832 &default_buffer_file_coding
);
4833 if (default_buffer_file_coding
.eol_type
!= CODING_EOL_UNDECIDED
)
4835 Lisp_Object subsidiaries
;
4837 coding
->eol_type
= default_buffer_file_coding
.eol_type
;
4838 subsidiaries
= Fget (coding
->symbol
, Qeol_type
);
4839 if (VECTORP (subsidiaries
)
4840 && XVECTOR (subsidiaries
)->size
== 3)
4842 = XVECTOR (subsidiaries
)->contents
[coding
->eol_type
];
4847 setup_raw_text_coding_system (coding
);
4848 goto done_setup_coding
;
4851 setup_coding_system (Fcheck_coding_system (val
), coding
);
4854 if (!STRINGP (start
) && !NILP (current_buffer
->selective_display
))
4855 coding
->mode
|= CODING_MODE_SELECTIVE_DISPLAY
;
4858 DEFUN ("write-region", Fwrite_region
, Swrite_region
, 3, 7,
4859 "r\nFWrite region to file: \ni\ni\ni\np",
4860 doc
: /* Write current region into specified file.
4861 When called from a program, requires three arguments:
4862 START, END and FILENAME. START and END are normally buffer positions
4863 specifying the part of the buffer to write.
4864 If START is nil, that means to use the entire buffer contents.
4865 If START is a string, then output that string to the file
4866 instead of any buffer contents; END is ignored.
4868 Optional fourth argument APPEND if non-nil means
4869 append to existing file contents (if any). If it is an integer,
4870 seek to that offset in the file before writing.
4871 Optional fifth argument VISIT, if t or a string, means
4872 set the last-save-file-modtime of buffer to this file's modtime
4873 and mark buffer not modified.
4874 If VISIT is a string, it is a second file name;
4875 the output goes to FILENAME, but the buffer is marked as visiting VISIT.
4876 VISIT is also the file name to lock and unlock for clash detection.
4877 If VISIT is neither t nor nil nor a string,
4878 that means do not display the \"Wrote file\" message.
4879 The optional sixth arg LOCKNAME, if non-nil, specifies the name to
4880 use for locking and unlocking, overriding FILENAME and VISIT.
4881 The optional seventh arg MUSTBENEW, if non-nil, insists on a check
4882 for an existing file with the same name. If MUSTBENEW is `excl',
4883 that means to get an error if the file already exists; never overwrite.
4884 If MUSTBENEW is neither nil nor `excl', that means ask for
4885 confirmation before overwriting, but do go ahead and overwrite the file
4886 if the user confirms.
4888 This does code conversion according to the value of
4889 `coding-system-for-write', `buffer-file-coding-system', or
4890 `file-coding-system-alist', and sets the variable
4891 `last-coding-system-used' to the coding system actually used. */)
4892 (start
, end
, filename
, append
, visit
, lockname
, mustbenew
)
4893 Lisp_Object start
, end
, filename
, append
, visit
, lockname
, mustbenew
;
4898 const unsigned char *fn
;
4901 int count
= SPECPDL_INDEX ();
4904 unsigned char *fname
= 0; /* If non-0, original filename (must rename) */
4906 Lisp_Object handler
;
4907 Lisp_Object visit_file
;
4908 Lisp_Object annotations
;
4909 Lisp_Object encoded_filename
;
4910 int visiting
= (EQ (visit
, Qt
) || STRINGP (visit
));
4911 int quietly
= !NILP (visit
);
4912 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
4913 struct buffer
*given_buffer
;
4915 int buffer_file_type
= O_BINARY
;
4917 struct coding_system coding
;
4919 if (current_buffer
->base_buffer
&& visiting
)
4920 error ("Cannot do file visiting in an indirect buffer");
4922 if (!NILP (start
) && !STRINGP (start
))
4923 validate_region (&start
, &end
);
4925 GCPRO5 (start
, filename
, visit
, visit_file
, lockname
);
4927 filename
= Fexpand_file_name (filename
, Qnil
);
4929 if (!NILP (mustbenew
) && !EQ (mustbenew
, Qexcl
))
4930 barf_or_query_if_file_exists (filename
, "overwrite", 1, 0, 1);
4932 if (STRINGP (visit
))
4933 visit_file
= Fexpand_file_name (visit
, Qnil
);
4935 visit_file
= filename
;
4937 if (NILP (lockname
))
4938 lockname
= visit_file
;
4942 /* If the file name has special constructs in it,
4943 call the corresponding file handler. */
4944 handler
= Ffind_file_name_handler (filename
, Qwrite_region
);
4945 /* If FILENAME has no handler, see if VISIT has one. */
4946 if (NILP (handler
) && STRINGP (visit
))
4947 handler
= Ffind_file_name_handler (visit
, Qwrite_region
);
4949 if (!NILP (handler
))
4952 val
= call6 (handler
, Qwrite_region
, start
, end
,
4953 filename
, append
, visit
);
4957 SAVE_MODIFF
= MODIFF
;
4958 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
4959 current_buffer
->filename
= visit_file
;
4965 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
4967 /* Special kludge to simplify auto-saving. */
4970 XSETFASTINT (start
, BEG
);
4971 XSETFASTINT (end
, Z
);
4975 record_unwind_protect (build_annotations_unwind
, Fcurrent_buffer ());
4976 count1
= SPECPDL_INDEX ();
4978 given_buffer
= current_buffer
;
4980 if (!STRINGP (start
))
4982 annotations
= build_annotations (start
, end
);
4984 if (current_buffer
!= given_buffer
)
4986 XSETFASTINT (start
, BEGV
);
4987 XSETFASTINT (end
, ZV
);
4993 GCPRO5 (start
, filename
, annotations
, visit_file
, lockname
);
4995 /* Decide the coding-system to encode the data with.
4996 We used to make this choice before calling build_annotations, but that
4997 leads to problems when a write-annotate-function takes care of
4998 unsavable chars (as was the case with X-Symbol). */
4999 choose_write_coding_system (start
, end
, filename
,
5000 append
, visit
, lockname
, &coding
);
5001 Vlast_coding_system_used
= coding
.symbol
;
5003 given_buffer
= current_buffer
;
5004 if (! STRINGP (start
))
5006 annotations
= build_annotations_2 (start
, end
,
5007 coding
.pre_write_conversion
, annotations
);
5008 if (current_buffer
!= given_buffer
)
5010 XSETFASTINT (start
, BEGV
);
5011 XSETFASTINT (end
, ZV
);
5015 #ifdef CLASH_DETECTION
5018 #if 0 /* This causes trouble for GNUS. */
5019 /* If we've locked this file for some other buffer,
5020 query before proceeding. */
5021 if (!visiting
&& EQ (Ffile_locked_p (lockname
), Qt
))
5022 call2 (intern ("ask-user-about-lock"), filename
, Vuser_login_name
);
5025 lock_file (lockname
);
5027 #endif /* CLASH_DETECTION */
5029 encoded_filename
= ENCODE_FILE (filename
);
5031 fn
= SDATA (encoded_filename
);
5035 desc
= emacs_open (fn
, O_WRONLY
| buffer_file_type
, 0);
5036 #else /* not DOS_NT */
5037 desc
= emacs_open (fn
, O_WRONLY
, 0);
5038 #endif /* not DOS_NT */
5040 if (desc
< 0 && (NILP (append
) || errno
== ENOENT
))
5042 if (auto_saving
) /* Overwrite any previous version of autosave file */
5044 vms_truncate (fn
); /* if fn exists, truncate to zero length */
5045 desc
= emacs_open (fn
, O_RDWR
, 0);
5047 desc
= creat_copy_attrs (STRINGP (current_buffer
->filename
)
5048 ? SDATA (current_buffer
->filename
) : 0,
5051 else /* Write to temporary name and rename if no errors */
5053 Lisp_Object temp_name
;
5054 temp_name
= Ffile_name_directory (filename
);
5056 if (!NILP (temp_name
))
5058 temp_name
= Fmake_temp_name (concat2 (temp_name
,
5059 build_string ("$$SAVE$$")));
5060 fname
= SDATA (filename
);
5061 fn
= SDATA (temp_name
);
5062 desc
= creat_copy_attrs (fname
, fn
);
5065 /* If we can't open the temporary file, try creating a new
5066 version of the original file. VMS "creat" creates a
5067 new version rather than truncating an existing file. */
5070 desc
= creat (fn
, 0666);
5071 #if 0 /* This can clobber an existing file and fail to replace it,
5072 if the user runs out of space. */
5075 /* We can't make a new version;
5076 try to truncate and rewrite existing version if any. */
5078 desc
= emacs_open (fn
, O_RDWR
, 0);
5084 desc
= creat (fn
, 0666);
5088 desc
= emacs_open (fn
,
5089 O_WRONLY
| O_CREAT
| buffer_file_type
5090 | (EQ (mustbenew
, Qexcl
) ? O_EXCL
: O_TRUNC
),
5091 S_IREAD
| S_IWRITE
);
5092 #else /* not DOS_NT */
5093 desc
= emacs_open (fn
, O_WRONLY
| O_TRUNC
| O_CREAT
5094 | (EQ (mustbenew
, Qexcl
) ? O_EXCL
: 0),
5095 auto_saving
? auto_save_mode_bits
: 0666);
5096 #endif /* not DOS_NT */
5097 #endif /* not VMS */
5101 #ifdef CLASH_DETECTION
5103 if (!auto_saving
) unlock_file (lockname
);
5105 #endif /* CLASH_DETECTION */
5107 report_file_error ("Opening output file", Fcons (filename
, Qnil
));
5110 record_unwind_protect (close_file_unwind
, make_number (desc
));
5112 if (!NILP (append
) && !NILP (Ffile_regular_p (filename
)))
5116 if (NUMBERP (append
))
5117 ret
= lseek (desc
, XINT (append
), 1);
5119 ret
= lseek (desc
, 0, 2);
5122 #ifdef CLASH_DETECTION
5123 if (!auto_saving
) unlock_file (lockname
);
5124 #endif /* CLASH_DETECTION */
5126 report_file_error ("Lseek error", Fcons (filename
, Qnil
));
5134 * Kludge Warning: The VMS C RTL likes to insert carriage returns
5135 * if we do writes that don't end with a carriage return. Furthermore
5136 * it cannot handle writes of more then 16K. The modified
5137 * version of "sys_write" in SYSDEP.C (see comment there) copes with
5138 * this EXCEPT for the last record (iff it doesn't end with a carriage
5139 * return). This implies that if your buffer doesn't end with a carriage
5140 * return, you get one free... tough. However it also means that if
5141 * we make two calls to sys_write (a la the following code) you can
5142 * get one at the gap as well. The easiest way to fix this (honest)
5143 * is to move the gap to the next newline (or the end of the buffer).
5148 if (GPT
> BEG
&& GPT_ADDR
[-1] != '\n')
5149 move_gap (find_next_newline (GPT
, 1));
5151 /* Whether VMS or not, we must move the gap to the next of newline
5152 when we must put designation sequences at beginning of line. */
5153 if (INTEGERP (start
)
5154 && coding
.type
== coding_type_iso2022
5155 && coding
.flags
& CODING_FLAG_ISO_DESIGNATE_AT_BOL
5156 && GPT
> BEG
&& GPT_ADDR
[-1] != '\n')
5158 int opoint
= PT
, opoint_byte
= PT_BYTE
;
5159 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 0);
5160 move_gap_both (PT
, PT_BYTE
);
5161 SET_PT_BOTH (opoint
, opoint_byte
);
5168 if (STRINGP (start
))
5170 failure
= 0 > a_write (desc
, start
, 0, SCHARS (start
),
5171 &annotations
, &coding
);
5174 else if (XINT (start
) != XINT (end
))
5176 tem
= CHAR_TO_BYTE (XINT (start
));
5178 if (XINT (start
) < GPT
)
5180 failure
= 0 > a_write (desc
, Qnil
, XINT (start
),
5181 min (GPT
, XINT (end
)) - XINT (start
),
5182 &annotations
, &coding
);
5186 if (XINT (end
) > GPT
&& !failure
)
5188 tem
= max (XINT (start
), GPT
);
5189 failure
= 0 > a_write (desc
, Qnil
, tem
, XINT (end
) - tem
,
5190 &annotations
, &coding
);
5196 /* If file was empty, still need to write the annotations */
5197 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
5198 failure
= 0 > a_write (desc
, Qnil
, XINT (end
), 0, &annotations
, &coding
);
5202 if (CODING_REQUIRE_FLUSHING (&coding
)
5203 && !(coding
.mode
& CODING_MODE_LAST_BLOCK
)
5206 /* We have to flush out a data. */
5207 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
5208 failure
= 0 > e_write (desc
, Qnil
, 0, 0, &coding
);
5215 /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun).
5216 Disk full in NFS may be reported here. */
5217 /* mib says that closing the file will try to write as fast as NFS can do
5218 it, and that means the fsync here is not crucial for autosave files. */
5219 if (!auto_saving
&& fsync (desc
) < 0)
5221 /* If fsync fails with EINTR, don't treat that as serious. */
5223 failure
= 1, save_errno
= errno
;
5227 /* Spurious "file has changed on disk" warnings have been
5228 observed on Suns as well.
5229 It seems that `close' can change the modtime, under nfs.
5231 (This has supposedly been fixed in Sunos 4,
5232 but who knows about all the other machines with NFS?) */
5235 /* On VMS and APOLLO, must do the stat after the close
5236 since closing changes the modtime. */
5239 /* Recall that #if defined does not work on VMS. */
5246 /* NFS can report a write failure now. */
5247 if (emacs_close (desc
) < 0)
5248 failure
= 1, save_errno
= errno
;
5251 /* If we wrote to a temporary name and had no errors, rename to real name. */
5255 failure
= (rename (fn
, fname
) != 0), save_errno
= errno
;
5263 /* Discard the unwind protect for close_file_unwind. */
5264 specpdl_ptr
= specpdl
+ count1
;
5265 /* Restore the original current buffer. */
5266 visit_file
= unbind_to (count
, visit_file
);
5268 #ifdef CLASH_DETECTION
5270 unlock_file (lockname
);
5271 #endif /* CLASH_DETECTION */
5273 /* Do this before reporting IO error
5274 to avoid a "file has changed on disk" warning on
5275 next attempt to save. */
5277 current_buffer
->modtime
= st
.st_mtime
;
5280 error ("IO error writing %s: %s", SDATA (filename
),
5281 emacs_strerror (save_errno
));
5285 SAVE_MODIFF
= MODIFF
;
5286 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
5287 current_buffer
->filename
= visit_file
;
5288 update_mode_lines
++;
5293 && ! NILP (Fstring_equal (current_buffer
->filename
,
5294 current_buffer
->auto_save_file_name
)))
5295 SAVE_MODIFF
= MODIFF
;
5301 message_with_string ((INTEGERP (append
)
5311 Lisp_Object
merge ();
5313 DEFUN ("car-less-than-car", Fcar_less_than_car
, Scar_less_than_car
, 2, 2, 0,
5314 doc
: /* Return t if (car A) is numerically less than (car B). */)
5318 return Flss (Fcar (a
), Fcar (b
));
5321 /* Build the complete list of annotations appropriate for writing out
5322 the text between START and END, by calling all the functions in
5323 write-region-annotate-functions and merging the lists they return.
5324 If one of these functions switches to a different buffer, we assume
5325 that buffer contains altered text. Therefore, the caller must
5326 make sure to restore the current buffer in all cases,
5327 as save-excursion would do. */
5330 build_annotations (start
, end
)
5331 Lisp_Object start
, end
;
5333 Lisp_Object annotations
;
5335 struct gcpro gcpro1
, gcpro2
;
5336 Lisp_Object original_buffer
;
5337 int i
, used_global
= 0;
5339 XSETBUFFER (original_buffer
, current_buffer
);
5342 p
= Vwrite_region_annotate_functions
;
5343 GCPRO2 (annotations
, p
);
5346 struct buffer
*given_buffer
= current_buffer
;
5347 if (EQ (Qt
, XCAR (p
)) && !used_global
)
5348 { /* Use the global value of the hook. */
5351 arg
[0] = Fdefault_value (Qwrite_region_annotate_functions
);
5353 p
= Fappend (2, arg
);
5356 Vwrite_region_annotations_so_far
= annotations
;
5357 res
= call2 (XCAR (p
), start
, end
);
5358 /* If the function makes a different buffer current,
5359 assume that means this buffer contains altered text to be output.
5360 Reset START and END from the buffer bounds
5361 and discard all previous annotations because they should have
5362 been dealt with by this function. */
5363 if (current_buffer
!= given_buffer
)
5365 XSETFASTINT (start
, BEGV
);
5366 XSETFASTINT (end
, ZV
);
5369 Flength (res
); /* Check basic validity of return value */
5370 annotations
= merge (annotations
, res
, Qcar_less_than_car
);
5374 /* Now do the same for annotation functions implied by the file-format */
5375 if (auto_saving
&& (!EQ (current_buffer
->auto_save_file_format
, Qt
)))
5376 p
= current_buffer
->auto_save_file_format
;
5378 p
= current_buffer
->file_format
;
5379 for (i
= 0; CONSP (p
); p
= XCDR (p
), ++i
)
5381 struct buffer
*given_buffer
= current_buffer
;
5383 Vwrite_region_annotations_so_far
= annotations
;
5385 /* Value is either a list of annotations or nil if the function
5386 has written annotations to a temporary buffer, which is now
5388 res
= call5 (Qformat_annotate_function
, XCAR (p
), start
, end
,
5389 original_buffer
, make_number (i
));
5390 if (current_buffer
!= given_buffer
)
5392 XSETFASTINT (start
, BEGV
);
5393 XSETFASTINT (end
, ZV
);
5398 annotations
= merge (annotations
, res
, Qcar_less_than_car
);
5406 build_annotations_2 (start
, end
, pre_write_conversion
, annotations
)
5407 Lisp_Object start
, end
, pre_write_conversion
, annotations
;
5409 struct gcpro gcpro1
;
5412 GCPRO1 (annotations
);
5413 /* At last, do the same for the function PRE_WRITE_CONVERSION
5414 implied by the current coding-system. */
5415 if (!NILP (pre_write_conversion
))
5417 struct buffer
*given_buffer
= current_buffer
;
5418 Vwrite_region_annotations_so_far
= annotations
;
5419 res
= call2 (pre_write_conversion
, start
, end
);
5421 annotations
= (current_buffer
!= given_buffer
5423 : merge (annotations
, res
, Qcar_less_than_car
));
5430 /* Write to descriptor DESC the NCHARS chars starting at POS of STRING.
5431 If STRING is nil, POS is the character position in the current buffer.
5432 Intersperse with them the annotations from *ANNOT
5433 which fall within the range of POS to POS + NCHARS,
5434 each at its appropriate position.
5436 We modify *ANNOT by discarding elements as we use them up.
5438 The return value is negative in case of system call failure. */
5441 a_write (desc
, string
, pos
, nchars
, annot
, coding
)
5444 register int nchars
;
5447 struct coding_system
*coding
;
5451 int lastpos
= pos
+ nchars
;
5453 while (NILP (*annot
) || CONSP (*annot
))
5455 tem
= Fcar_safe (Fcar (*annot
));
5458 nextpos
= XFASTINT (tem
);
5460 /* If there are no more annotations in this range,
5461 output the rest of the range all at once. */
5462 if (! (nextpos
>= pos
&& nextpos
<= lastpos
))
5463 return e_write (desc
, string
, pos
, lastpos
, coding
);
5465 /* Output buffer text up to the next annotation's position. */
5468 if (0 > e_write (desc
, string
, pos
, nextpos
, coding
))
5472 /* Output the annotation. */
5473 tem
= Fcdr (Fcar (*annot
));
5476 if (0 > e_write (desc
, tem
, 0, SCHARS (tem
), coding
))
5479 *annot
= Fcdr (*annot
);
5484 #ifndef WRITE_BUF_SIZE
5485 #define WRITE_BUF_SIZE (16 * 1024)
5488 /* Write text in the range START and END into descriptor DESC,
5489 encoding them with coding system CODING. If STRING is nil, START
5490 and END are character positions of the current buffer, else they
5491 are indexes to the string STRING. */
5494 e_write (desc
, string
, start
, end
, coding
)
5498 struct coding_system
*coding
;
5500 register char *addr
;
5501 register int nbytes
;
5502 char buf
[WRITE_BUF_SIZE
];
5506 coding
->composing
= COMPOSITION_DISABLED
;
5507 if (coding
->composing
!= COMPOSITION_DISABLED
)
5508 coding_save_composition (coding
, start
, end
, string
);
5510 if (STRINGP (string
))
5512 addr
= SDATA (string
);
5513 nbytes
= SBYTES (string
);
5514 coding
->src_multibyte
= STRING_MULTIBYTE (string
);
5516 else if (start
< end
)
5518 /* It is assured that the gap is not in the range START and END-1. */
5519 addr
= CHAR_POS_ADDR (start
);
5520 nbytes
= CHAR_TO_BYTE (end
) - CHAR_TO_BYTE (start
);
5521 coding
->src_multibyte
5522 = !NILP (current_buffer
->enable_multibyte_characters
);
5528 coding
->src_multibyte
= 1;
5531 /* We used to have a code for handling selective display here. But,
5532 now it is handled within encode_coding. */
5537 result
= encode_coding (coding
, addr
, buf
, nbytes
, WRITE_BUF_SIZE
);
5538 if (coding
->produced
> 0)
5540 coding
->produced
-= emacs_write (desc
, buf
, coding
->produced
);
5541 if (coding
->produced
)
5547 nbytes
-= coding
->consumed
;
5548 addr
+= coding
->consumed
;
5549 if (result
== CODING_FINISH_INSUFFICIENT_SRC
5552 /* The source text ends by an incomplete multibyte form.
5553 There's no way other than write it out as is. */
5554 nbytes
-= emacs_write (desc
, addr
, nbytes
);
5563 start
+= coding
->consumed_char
;
5564 if (coding
->cmp_data
)
5565 coding_adjust_composition_offset (coding
, start
);
5568 if (coding
->cmp_data
)
5569 coding_free_composition_data (coding
);
5574 DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime
,
5575 Sverify_visited_file_modtime
, 1, 1, 0,
5576 doc
: /* Return t if last mod time of BUF's visited file matches what BUF records.
5577 This means that the file has not been changed since it was visited or saved.
5578 See Info node `(elisp)Modification Time' for more details. */)
5584 Lisp_Object handler
;
5585 Lisp_Object filename
;
5590 if (!STRINGP (b
->filename
)) return Qt
;
5591 if (b
->modtime
== 0) return Qt
;
5593 /* If the file name has special constructs in it,
5594 call the corresponding file handler. */
5595 handler
= Ffind_file_name_handler (b
->filename
,
5596 Qverify_visited_file_modtime
);
5597 if (!NILP (handler
))
5598 return call2 (handler
, Qverify_visited_file_modtime
, buf
);
5600 filename
= ENCODE_FILE (b
->filename
);
5602 if (stat (SDATA (filename
), &st
) < 0)
5604 /* If the file doesn't exist now and didn't exist before,
5605 we say that it isn't modified, provided the error is a tame one. */
5606 if (errno
== ENOENT
|| errno
== EACCES
|| errno
== ENOTDIR
)
5611 if (st
.st_mtime
== b
->modtime
5612 /* If both are positive, accept them if they are off by one second. */
5613 || (st
.st_mtime
> 0 && b
->modtime
> 0
5614 && (st
.st_mtime
== b
->modtime
+ 1
5615 || st
.st_mtime
== b
->modtime
- 1)))
5620 DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime
,
5621 Sclear_visited_file_modtime
, 0, 0, 0,
5622 doc
: /* Clear out records of last mod time of visited file.
5623 Next attempt to save will certainly not complain of a discrepancy. */)
5626 current_buffer
->modtime
= 0;
5630 DEFUN ("visited-file-modtime", Fvisited_file_modtime
,
5631 Svisited_file_modtime
, 0, 0, 0,
5632 doc
: /* Return the current buffer's recorded visited file modification time.
5633 The value is a list of the form (HIGH LOW), like the time values
5634 that `file-attributes' returns. If the current buffer has no recorded
5635 file modification time, this function returns 0.
5636 See Info node `(elisp)Modification Time' for more details. */)
5640 tcons
= long_to_cons ((unsigned long) current_buffer
->modtime
);
5642 return list2 (XCAR (tcons
), XCDR (tcons
));
5646 DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime
,
5647 Sset_visited_file_modtime
, 0, 1, 0,
5648 doc
: /* Update buffer's recorded modification time from the visited file's time.
5649 Useful if the buffer was not read from the file normally
5650 or if the file itself has been changed for some known benign reason.
5651 An argument specifies the modification time value to use
5652 \(instead of that of the visited file), in the form of a list
5653 \(HIGH . LOW) or (HIGH LOW). */)
5655 Lisp_Object time_list
;
5657 if (!NILP (time_list
))
5658 current_buffer
->modtime
= cons_to_long (time_list
);
5661 register Lisp_Object filename
;
5663 Lisp_Object handler
;
5665 filename
= Fexpand_file_name (current_buffer
->filename
, Qnil
);
5667 /* If the file name has special constructs in it,
5668 call the corresponding file handler. */
5669 handler
= Ffind_file_name_handler (filename
, Qset_visited_file_modtime
);
5670 if (!NILP (handler
))
5671 /* The handler can find the file name the same way we did. */
5672 return call2 (handler
, Qset_visited_file_modtime
, Qnil
);
5674 filename
= ENCODE_FILE (filename
);
5676 if (stat (SDATA (filename
), &st
) >= 0)
5677 current_buffer
->modtime
= st
.st_mtime
;
5684 auto_save_error (error
)
5687 Lisp_Object args
[3], msg
;
5689 struct gcpro gcpro1
;
5693 args
[0] = build_string ("Auto-saving %s: %s");
5694 args
[1] = current_buffer
->name
;
5695 args
[2] = Ferror_message_string (error
);
5696 msg
= Fformat (3, args
);
5698 nbytes
= SBYTES (msg
);
5700 for (i
= 0; i
< 3; ++i
)
5703 message2 (SDATA (msg
), nbytes
, STRING_MULTIBYTE (msg
));
5705 message2_nolog (SDATA (msg
), nbytes
, STRING_MULTIBYTE (msg
));
5706 Fsleep_for (make_number (1), Qnil
);
5719 auto_save_mode_bits
= 0666;
5721 /* Get visited file's mode to become the auto save file's mode. */
5722 if (! NILP (current_buffer
->filename
))
5724 if (stat (SDATA (current_buffer
->filename
), &st
) >= 0)
5725 /* But make sure we can overwrite it later! */
5726 auto_save_mode_bits
= st
.st_mode
| 0600;
5727 else if ((modes
= Ffile_modes (current_buffer
->filename
),
5729 /* Remote files don't cooperate with stat. */
5730 auto_save_mode_bits
= XINT (modes
) | 0600;
5734 Fwrite_region (Qnil
, Qnil
,
5735 current_buffer
->auto_save_file_name
,
5736 Qnil
, Qlambda
, Qnil
, Qnil
);
5740 do_auto_save_unwind (stream
) /* used as unwind-protect function */
5745 fclose ((FILE *) (XFASTINT (XCAR (stream
)) << 16
5746 | XFASTINT (XCDR (stream
))));
5751 do_auto_save_unwind_1 (value
) /* used as unwind-protect function */
5754 minibuffer_auto_raise
= XINT (value
);
5759 do_auto_save_make_dir (dir
)
5762 return call2 (Qmake_directory
, dir
, Qt
);
5766 do_auto_save_eh (ignore
)
5772 DEFUN ("do-auto-save", Fdo_auto_save
, Sdo_auto_save
, 0, 2, "",
5773 doc
: /* Auto-save all buffers that need it.
5774 This is all buffers that have auto-saving enabled
5775 and are changed since last auto-saved.
5776 Auto-saving writes the buffer into a file
5777 so that your editing is not lost if the system crashes.
5778 This file is not the file you visited; that changes only when you save.
5779 Normally we run the normal hook `auto-save-hook' before saving.
5781 A non-nil NO-MESSAGE argument means do not print any message if successful.
5782 A non-nil CURRENT-ONLY argument means save only current buffer. */)
5783 (no_message
, current_only
)
5784 Lisp_Object no_message
, current_only
;
5786 struct buffer
*old
= current_buffer
, *b
;
5787 Lisp_Object tail
, buf
;
5789 int do_handled_files
;
5792 Lisp_Object lispstream
;
5793 int count
= SPECPDL_INDEX ();
5794 int orig_minibuffer_auto_raise
= minibuffer_auto_raise
;
5795 int old_message_p
= 0;
5796 struct gcpro gcpro1
, gcpro2
;
5798 if (max_specpdl_size
< specpdl_size
+ 40)
5799 max_specpdl_size
= specpdl_size
+ 40;
5804 if (NILP (no_message
))
5806 old_message_p
= push_message ();
5807 record_unwind_protect (pop_message_unwind
, Qnil
);
5810 /* Ordinarily don't quit within this function,
5811 but don't make it impossible to quit (in case we get hung in I/O). */
5815 /* No GCPRO needed, because (when it matters) all Lisp_Object variables
5816 point to non-strings reached from Vbuffer_alist. */
5818 if (!NILP (Vrun_hooks
))
5819 call1 (Vrun_hooks
, intern ("auto-save-hook"));
5821 if (STRINGP (Vauto_save_list_file_name
))
5823 Lisp_Object listfile
;
5825 listfile
= Fexpand_file_name (Vauto_save_list_file_name
, Qnil
);
5827 /* Don't try to create the directory when shutting down Emacs,
5828 because creating the directory might signal an error, and
5829 that would leave Emacs in a strange state. */
5830 if (!NILP (Vrun_hooks
))
5834 GCPRO2 (dir
, listfile
);
5835 dir
= Ffile_name_directory (listfile
);
5836 if (NILP (Ffile_directory_p (dir
)))
5837 internal_condition_case_1 (do_auto_save_make_dir
,
5838 dir
, Fcons (Fcons (Qfile_error
, Qnil
), Qnil
),
5843 stream
= fopen (SDATA (listfile
), "w");
5846 /* Arrange to close that file whether or not we get an error.
5847 Also reset auto_saving to 0. */
5848 lispstream
= Fcons (Qnil
, Qnil
);
5849 XSETCARFASTINT (lispstream
, (EMACS_UINT
)stream
>> 16);
5850 XSETCDRFASTINT (lispstream
, (EMACS_UINT
)stream
& 0xffff);
5861 record_unwind_protect (do_auto_save_unwind
, lispstream
);
5862 record_unwind_protect (do_auto_save_unwind_1
,
5863 make_number (minibuffer_auto_raise
));
5864 minibuffer_auto_raise
= 0;
5867 /* On first pass, save all files that don't have handlers.
5868 On second pass, save all files that do have handlers.
5870 If Emacs is crashing, the handlers may tweak what is causing
5871 Emacs to crash in the first place, and it would be a shame if
5872 Emacs failed to autosave perfectly ordinary files because it
5873 couldn't handle some ange-ftp'd file. */
5875 for (do_handled_files
= 0; do_handled_files
< 2; do_handled_files
++)
5876 for (tail
= Vbuffer_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5878 buf
= XCDR (XCAR (tail
));
5881 /* Record all the buffers that have auto save mode
5882 in the special file that lists them. For each of these buffers,
5883 Record visited name (if any) and auto save name. */
5884 if (STRINGP (b
->auto_save_file_name
)
5885 && stream
!= NULL
&& do_handled_files
== 0)
5887 if (!NILP (b
->filename
))
5889 fwrite (SDATA (b
->filename
), 1,
5890 SBYTES (b
->filename
), stream
);
5892 putc ('\n', stream
);
5893 fwrite (SDATA (b
->auto_save_file_name
), 1,
5894 SBYTES (b
->auto_save_file_name
), stream
);
5895 putc ('\n', stream
);
5898 if (!NILP (current_only
)
5899 && b
!= current_buffer
)
5902 /* Don't auto-save indirect buffers.
5903 The base buffer takes care of it. */
5907 /* Check for auto save enabled
5908 and file changed since last auto save
5909 and file changed since last real save. */
5910 if (STRINGP (b
->auto_save_file_name
)
5911 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
5912 && b
->auto_save_modified
< BUF_MODIFF (b
)
5913 /* -1 means we've turned off autosaving for a while--see below. */
5914 && XINT (b
->save_length
) >= 0
5915 && (do_handled_files
5916 || NILP (Ffind_file_name_handler (b
->auto_save_file_name
,
5919 EMACS_TIME before_time
, after_time
;
5921 EMACS_GET_TIME (before_time
);
5923 /* If we had a failure, don't try again for 20 minutes. */
5924 if (b
->auto_save_failure_time
>= 0
5925 && EMACS_SECS (before_time
) - b
->auto_save_failure_time
< 1200)
5928 if ((XFASTINT (b
->save_length
) * 10
5929 > (BUF_Z (b
) - BUF_BEG (b
)) * 13)
5930 /* A short file is likely to change a large fraction;
5931 spare the user annoying messages. */
5932 && XFASTINT (b
->save_length
) > 5000
5933 /* These messages are frequent and annoying for `*mail*'. */
5934 && !EQ (b
->filename
, Qnil
)
5935 && NILP (no_message
))
5937 /* It has shrunk too much; turn off auto-saving here. */
5938 minibuffer_auto_raise
= orig_minibuffer_auto_raise
;
5939 message_with_string ("Buffer %s has shrunk a lot; auto save disabled in that buffer until next real save",
5941 minibuffer_auto_raise
= 0;
5942 /* Turn off auto-saving until there's a real save,
5943 and prevent any more warnings. */
5944 XSETINT (b
->save_length
, -1);
5945 Fsleep_for (make_number (1), Qnil
);
5948 set_buffer_internal (b
);
5949 if (!auto_saved
&& NILP (no_message
))
5950 message1 ("Auto-saving...");
5951 internal_condition_case (auto_save_1
, Qt
, auto_save_error
);
5953 b
->auto_save_modified
= BUF_MODIFF (b
);
5954 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
5955 set_buffer_internal (old
);
5957 EMACS_GET_TIME (after_time
);
5959 /* If auto-save took more than 60 seconds,
5960 assume it was an NFS failure that got a timeout. */
5961 if (EMACS_SECS (after_time
) - EMACS_SECS (before_time
) > 60)
5962 b
->auto_save_failure_time
= EMACS_SECS (after_time
);
5966 /* Prevent another auto save till enough input events come in. */
5967 record_auto_save ();
5969 if (auto_saved
&& NILP (no_message
))
5973 /* If we are going to restore an old message,
5974 give time to read ours. */
5975 sit_for (1, 0, 0, 0, 0);
5979 /* If we displayed a message and then restored a state
5980 with no message, leave a "done" message on the screen. */
5981 message1 ("Auto-saving...done");
5986 /* This restores the message-stack status. */
5987 unbind_to (count
, Qnil
);
5991 DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved
,
5992 Sset_buffer_auto_saved
, 0, 0, 0,
5993 doc
: /* Mark current buffer as auto-saved with its current text.
5994 No auto-save file will be written until the buffer changes again. */)
5997 current_buffer
->auto_save_modified
= MODIFF
;
5998 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
5999 current_buffer
->auto_save_failure_time
= -1;
6003 DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure
,
6004 Sclear_buffer_auto_save_failure
, 0, 0, 0,
6005 doc
: /* Clear any record of a recent auto-save failure in the current buffer. */)
6008 current_buffer
->auto_save_failure_time
= -1;
6012 DEFUN ("recent-auto-save-p", Frecent_auto_save_p
, Srecent_auto_save_p
,
6014 doc
: /* Return t if buffer has been auto-saved since last read in or saved. */)
6017 return (SAVE_MODIFF
< current_buffer
->auto_save_modified
) ? Qt
: Qnil
;
6020 /* Reading and completing file names */
6021 extern Lisp_Object
Ffile_name_completion (), Ffile_name_all_completions ();
6023 /* In the string VAL, change each $ to $$ and return the result. */
6026 double_dollars (val
)
6029 register const unsigned char *old
;
6030 register unsigned char *new;
6034 osize
= SBYTES (val
);
6036 /* Count the number of $ characters. */
6037 for (n
= osize
, count
= 0, old
= SDATA (val
); n
> 0; n
--)
6038 if (*old
++ == '$') count
++;
6042 val
= make_uninit_multibyte_string (SCHARS (val
) + count
,
6045 for (n
= osize
; n
> 0; n
--)
6059 read_file_name_cleanup (arg
)
6062 return (current_buffer
->directory
= arg
);
6065 DEFUN ("read-file-name-internal", Fread_file_name_internal
, Sread_file_name_internal
,
6067 doc
: /* Internal subroutine for read-file-name. Do not call this. */)
6068 (string
, dir
, action
)
6069 Lisp_Object string
, dir
, action
;
6070 /* action is nil for complete, t for return list of completions,
6071 lambda for verify final value */
6073 Lisp_Object name
, specdir
, realdir
, val
, orig_string
;
6075 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
6077 CHECK_STRING (string
);
6084 /* No need to protect ACTION--we only compare it with t and nil. */
6085 GCPRO5 (string
, realdir
, name
, specdir
, orig_string
);
6087 if (SCHARS (string
) == 0)
6089 if (EQ (action
, Qlambda
))
6097 orig_string
= string
;
6098 string
= Fsubstitute_in_file_name (string
);
6099 changed
= NILP (Fstring_equal (string
, orig_string
));
6100 name
= Ffile_name_nondirectory (string
);
6101 val
= Ffile_name_directory (string
);
6103 realdir
= Fexpand_file_name (val
, realdir
);
6108 specdir
= Ffile_name_directory (string
);
6109 val
= Ffile_name_completion (name
, realdir
);
6114 return double_dollars (string
);
6118 if (!NILP (specdir
))
6119 val
= concat2 (specdir
, val
);
6121 return double_dollars (val
);
6124 #endif /* not VMS */
6128 if (EQ (action
, Qt
))
6130 Lisp_Object all
= Ffile_name_all_completions (name
, realdir
);
6134 if (NILP (Vread_file_name_predicate
)
6135 || EQ (Vread_file_name_predicate
, Qfile_exists_p
))
6139 if (EQ (Vread_file_name_predicate
, Qfile_directory_p
))
6141 /* Brute-force speed up for directory checking:
6142 Discard strings which don't end in a slash. */
6143 for (comp
= Qnil
; CONSP (all
); all
= XCDR (all
))
6145 Lisp_Object tem
= XCAR (all
);
6147 if (STRINGP (tem
) &&
6148 (len
= SCHARS (tem
), len
> 0) &&
6149 IS_DIRECTORY_SEP (SREF (tem
, len
-1)))
6150 comp
= Fcons (tem
, comp
);
6156 /* Must do it the hard (and slow) way. */
6157 GCPRO3 (all
, comp
, specdir
);
6158 count
= SPECPDL_INDEX ();
6159 record_unwind_protect (read_file_name_cleanup
, current_buffer
->directory
);
6160 current_buffer
->directory
= realdir
;
6161 for (comp
= Qnil
; CONSP (all
); all
= XCDR (all
))
6162 if (!NILP (call1 (Vread_file_name_predicate
, XCAR (all
))))
6163 comp
= Fcons (XCAR (all
), comp
);
6164 unbind_to (count
, Qnil
);
6167 return Fnreverse (comp
);
6170 /* Only other case actually used is ACTION = lambda */
6172 /* Supposedly this helps commands such as `cd' that read directory names,
6173 but can someone explain how it helps them? -- RMS */
6174 if (SCHARS (name
) == 0)
6177 string
= Fexpand_file_name (string
, dir
);
6178 if (!NILP (Vread_file_name_predicate
))
6179 return call1 (Vread_file_name_predicate
, string
);
6180 return Ffile_exists_p (string
);
6183 DEFUN ("next-read-file-uses-dialog-p", Fnext_read_file_uses_dialog_p
,
6184 Snext_read_file_uses_dialog_p
, 0, 0, 0,
6185 doc
: /* Return t if a call to `read-file-name' will use a dialog.
6186 The return value is only relevant for a call to `read-file-name' that happens
6187 before any other event (mouse or keypress) is handeled. */)
6190 #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK) || defined (TARGET_API_MAC_CARBON)
6191 if ((NILP (last_nonmenu_event
) || CONSP (last_nonmenu_event
))
6200 DEFUN ("read-file-name", Fread_file_name
, Sread_file_name
, 1, 6, 0,
6201 doc
: /* Read file name, prompting with PROMPT and completing in directory DIR.
6202 Value is not expanded---you must call `expand-file-name' yourself.
6203 Default name to DEFAULT-FILENAME if user exits the minibuffer with
6204 the same non-empty string that was inserted by this function.
6205 (If DEFAULT-FILENAME is omitted, the visited file name is used,
6206 except that if INITIAL is specified, that combined with DIR is used.)
6207 If the user exits with an empty minibuffer, this function returns
6208 an empty string. (This can only happen if the user erased the
6209 pre-inserted contents or if `insert-default-directory' is nil.)
6210 Fourth arg MUSTMATCH non-nil means require existing file's name.
6211 Non-nil and non-t means also require confirmation after completion.
6212 Fifth arg INITIAL specifies text to start with.
6213 If optional sixth arg PREDICATE is non-nil, possible completions and
6214 the resulting file name must satisfy (funcall PREDICATE NAME).
6215 DIR should be an absolute directory name. It defaults to the value of
6216 `default-directory'.
6218 If this command was invoked with the mouse, use a file dialog box if
6219 `use-dialog-box' is non-nil, and the window system or X toolkit in use
6220 provides a file dialog box.
6222 See also `read-file-name-completion-ignore-case'
6223 and `read-file-name-function'. */)
6224 (prompt
, dir
, default_filename
, mustmatch
, initial
, predicate
)
6225 Lisp_Object prompt
, dir
, default_filename
, mustmatch
, initial
, predicate
;
6227 Lisp_Object val
, insdef
, tem
;
6228 struct gcpro gcpro1
, gcpro2
;
6229 register char *homedir
;
6230 Lisp_Object decoded_homedir
;
6231 int replace_in_history
= 0;
6232 int add_to_history
= 0;
6236 dir
= current_buffer
->directory
;
6237 if (NILP (Ffile_name_absolute_p (dir
)))
6238 dir
= Fexpand_file_name (dir
, Qnil
);
6239 if (NILP (default_filename
))
6242 ? Fexpand_file_name (initial
, dir
)
6243 : current_buffer
->filename
);
6245 /* If dir starts with user's homedir, change that to ~. */
6246 homedir
= (char *) egetenv ("HOME");
6248 /* homedir can be NULL in temacs, since Vprocess_environment is not
6249 yet set up. We shouldn't crash in that case. */
6252 homedir
= strcpy (alloca (strlen (homedir
) + 1), homedir
);
6253 CORRECT_DIR_SEPS (homedir
);
6258 = DECODE_FILE (make_unibyte_string (homedir
, strlen (homedir
)));
6261 && !strncmp (SDATA (decoded_homedir
), SDATA (dir
),
6262 SBYTES (decoded_homedir
))
6263 && IS_DIRECTORY_SEP (SREF (dir
, SBYTES (decoded_homedir
))))
6265 dir
= Fsubstring (dir
, make_number (SCHARS (decoded_homedir
)), Qnil
);
6266 dir
= concat2 (build_string ("~"), dir
);
6268 /* Likewise for default_filename. */
6270 && STRINGP (default_filename
)
6271 && !strncmp (SDATA (decoded_homedir
), SDATA (default_filename
),
6272 SBYTES (decoded_homedir
))
6273 && IS_DIRECTORY_SEP (SREF (default_filename
, SBYTES (decoded_homedir
))))
6276 = Fsubstring (default_filename
,
6277 make_number (SCHARS (decoded_homedir
)), Qnil
);
6278 default_filename
= concat2 (build_string ("~"), default_filename
);
6280 if (!NILP (default_filename
))
6282 CHECK_STRING (default_filename
);
6283 default_filename
= double_dollars (default_filename
);
6286 if (insert_default_directory
&& STRINGP (dir
))
6289 if (!NILP (initial
))
6291 Lisp_Object args
[2], pos
;
6295 insdef
= Fconcat (2, args
);
6296 pos
= make_number (SCHARS (double_dollars (dir
)));
6297 insdef
= Fcons (double_dollars (insdef
), pos
);
6300 insdef
= double_dollars (insdef
);
6302 else if (STRINGP (initial
))
6303 insdef
= Fcons (double_dollars (initial
), make_number (0));
6307 if (!NILP (Vread_file_name_function
))
6309 Lisp_Object args
[7];
6311 GCPRO2 (insdef
, default_filename
);
6312 args
[0] = Vread_file_name_function
;
6315 args
[3] = default_filename
;
6316 args
[4] = mustmatch
;
6318 args
[6] = predicate
;
6319 RETURN_UNGCPRO (Ffuncall (7, args
));
6322 count
= SPECPDL_INDEX ();
6323 specbind (intern ("completion-ignore-case"),
6324 read_file_name_completion_ignore_case
? Qt
: Qnil
);
6325 specbind (intern ("minibuffer-completing-file-name"), Qt
);
6326 specbind (intern ("read-file-name-predicate"),
6327 (NILP (predicate
) ? Qfile_exists_p
: predicate
));
6329 GCPRO2 (insdef
, default_filename
);
6331 #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK) || defined (TARGET_API_MAC_CARBON)
6332 if (! NILP (Fnext_read_file_uses_dialog_p ()))
6334 /* If DIR contains a file name, split it. */
6336 file
= Ffile_name_nondirectory (dir
);
6337 if (SCHARS (file
) && NILP (default_filename
))
6339 default_filename
= file
;
6340 dir
= Ffile_name_directory (dir
);
6342 if (!NILP(default_filename
))
6343 default_filename
= Fexpand_file_name (default_filename
, dir
);
6344 val
= Fx_file_dialog (prompt
, dir
, default_filename
, mustmatch
,
6345 EQ (predicate
, Qfile_directory_p
) ? Qt
: Qnil
);
6350 val
= Fcompleting_read (prompt
, intern ("read-file-name-internal"),
6351 dir
, mustmatch
, insdef
,
6352 Qfile_name_history
, default_filename
, Qnil
);
6354 tem
= Fsymbol_value (Qfile_name_history
);
6355 if (CONSP (tem
) && EQ (XCAR (tem
), val
))
6356 replace_in_history
= 1;
6358 /* If Fcompleting_read returned the inserted default string itself
6359 (rather than a new string with the same contents),
6360 it has to mean that the user typed RET with the minibuffer empty.
6361 In that case, we really want to return ""
6362 so that commands such as set-visited-file-name can distinguish. */
6363 if (EQ (val
, default_filename
))
6365 /* In this case, Fcompleting_read has not added an element
6366 to the history. Maybe we should. */
6367 if (! replace_in_history
)
6373 unbind_to (count
, Qnil
);
6376 error ("No file name specified");
6378 tem
= Fstring_equal (val
, CONSP (insdef
) ? XCAR (insdef
) : insdef
);
6380 if (!NILP (tem
) && !NILP (default_filename
))
6381 val
= default_filename
;
6382 val
= Fsubstitute_in_file_name (val
);
6384 if (replace_in_history
)
6385 /* Replace what Fcompleting_read added to the history
6386 with what we will actually return. */
6387 XSETCAR (Fsymbol_value (Qfile_name_history
), double_dollars (val
));
6388 else if (add_to_history
)
6390 /* Add the value to the history--but not if it matches
6391 the last value already there. */
6392 Lisp_Object val1
= double_dollars (val
);
6393 tem
= Fsymbol_value (Qfile_name_history
);
6394 if (! CONSP (tem
) || NILP (Fequal (XCAR (tem
), val1
)))
6395 Fset (Qfile_name_history
,
6406 /* Must be set before any path manipulation is performed. */
6407 XSETFASTINT (Vdirectory_sep_char
, '/');
6414 Qexpand_file_name
= intern ("expand-file-name");
6415 Qsubstitute_in_file_name
= intern ("substitute-in-file-name");
6416 Qdirectory_file_name
= intern ("directory-file-name");
6417 Qfile_name_directory
= intern ("file-name-directory");
6418 Qfile_name_nondirectory
= intern ("file-name-nondirectory");
6419 Qunhandled_file_name_directory
= intern ("unhandled-file-name-directory");
6420 Qfile_name_as_directory
= intern ("file-name-as-directory");
6421 Qcopy_file
= intern ("copy-file");
6422 Qmake_directory_internal
= intern ("make-directory-internal");
6423 Qmake_directory
= intern ("make-directory");
6424 Qdelete_directory
= intern ("delete-directory");
6425 Qdelete_file
= intern ("delete-file");
6426 Qrename_file
= intern ("rename-file");
6427 Qadd_name_to_file
= intern ("add-name-to-file");
6428 Qmake_symbolic_link
= intern ("make-symbolic-link");
6429 Qfile_exists_p
= intern ("file-exists-p");
6430 Qfile_executable_p
= intern ("file-executable-p");
6431 Qfile_readable_p
= intern ("file-readable-p");
6432 Qfile_writable_p
= intern ("file-writable-p");
6433 Qfile_symlink_p
= intern ("file-symlink-p");
6434 Qaccess_file
= intern ("access-file");
6435 Qfile_directory_p
= intern ("file-directory-p");
6436 Qfile_regular_p
= intern ("file-regular-p");
6437 Qfile_accessible_directory_p
= intern ("file-accessible-directory-p");
6438 Qfile_modes
= intern ("file-modes");
6439 Qset_file_modes
= intern ("set-file-modes");
6440 Qset_file_times
= intern ("set-file-times");
6441 Qfile_newer_than_file_p
= intern ("file-newer-than-file-p");
6442 Qinsert_file_contents
= intern ("insert-file-contents");
6443 Qwrite_region
= intern ("write-region");
6444 Qverify_visited_file_modtime
= intern ("verify-visited-file-modtime");
6445 Qset_visited_file_modtime
= intern ("set-visited-file-modtime");
6446 Qauto_save_coding
= intern ("auto-save-coding");
6448 staticpro (&Qexpand_file_name
);
6449 staticpro (&Qsubstitute_in_file_name
);
6450 staticpro (&Qdirectory_file_name
);
6451 staticpro (&Qfile_name_directory
);
6452 staticpro (&Qfile_name_nondirectory
);
6453 staticpro (&Qunhandled_file_name_directory
);
6454 staticpro (&Qfile_name_as_directory
);
6455 staticpro (&Qcopy_file
);
6456 staticpro (&Qmake_directory_internal
);
6457 staticpro (&Qmake_directory
);
6458 staticpro (&Qdelete_directory
);
6459 staticpro (&Qdelete_file
);
6460 staticpro (&Qrename_file
);
6461 staticpro (&Qadd_name_to_file
);
6462 staticpro (&Qmake_symbolic_link
);
6463 staticpro (&Qfile_exists_p
);
6464 staticpro (&Qfile_executable_p
);
6465 staticpro (&Qfile_readable_p
);
6466 staticpro (&Qfile_writable_p
);
6467 staticpro (&Qaccess_file
);
6468 staticpro (&Qfile_symlink_p
);
6469 staticpro (&Qfile_directory_p
);
6470 staticpro (&Qfile_regular_p
);
6471 staticpro (&Qfile_accessible_directory_p
);
6472 staticpro (&Qfile_modes
);
6473 staticpro (&Qset_file_modes
);
6474 staticpro (&Qset_file_times
);
6475 staticpro (&Qfile_newer_than_file_p
);
6476 staticpro (&Qinsert_file_contents
);
6477 staticpro (&Qwrite_region
);
6478 staticpro (&Qverify_visited_file_modtime
);
6479 staticpro (&Qset_visited_file_modtime
);
6480 staticpro (&Qauto_save_coding
);
6482 Qfile_name_history
= intern ("file-name-history");
6483 Fset (Qfile_name_history
, Qnil
);
6484 staticpro (&Qfile_name_history
);
6486 Qfile_error
= intern ("file-error");
6487 staticpro (&Qfile_error
);
6488 Qfile_already_exists
= intern ("file-already-exists");
6489 staticpro (&Qfile_already_exists
);
6490 Qfile_date_error
= intern ("file-date-error");
6491 staticpro (&Qfile_date_error
);
6492 Qexcl
= intern ("excl");
6496 Qfind_buffer_file_type
= intern ("find-buffer-file-type");
6497 staticpro (&Qfind_buffer_file_type
);
6500 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system
,
6501 doc
: /* *Coding system for encoding file names.
6502 If it is nil, `default-file-name-coding-system' (which see) is used. */);
6503 Vfile_name_coding_system
= Qnil
;
6505 DEFVAR_LISP ("default-file-name-coding-system",
6506 &Vdefault_file_name_coding_system
,
6507 doc
: /* Default coding system for encoding file names.
6508 This variable is used only when `file-name-coding-system' is nil.
6510 This variable is set/changed by the command `set-language-environment'.
6511 User should not set this variable manually,
6512 instead use `file-name-coding-system' to get a constant encoding
6513 of file names regardless of the current language environment. */);
6514 Vdefault_file_name_coding_system
= Qnil
;
6516 Qformat_decode
= intern ("format-decode");
6517 staticpro (&Qformat_decode
);
6518 Qformat_annotate_function
= intern ("format-annotate-function");
6519 staticpro (&Qformat_annotate_function
);
6520 Qafter_insert_file_set_coding
= intern ("after-insert-file-set-coding");
6521 staticpro (&Qafter_insert_file_set_coding
);
6523 Qcar_less_than_car
= intern ("car-less-than-car");
6524 staticpro (&Qcar_less_than_car
);
6526 Fput (Qfile_error
, Qerror_conditions
,
6527 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
)));
6528 Fput (Qfile_error
, Qerror_message
,
6529 build_string ("File error"));
6531 Fput (Qfile_already_exists
, Qerror_conditions
,
6532 Fcons (Qfile_already_exists
,
6533 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
))));
6534 Fput (Qfile_already_exists
, Qerror_message
,
6535 build_string ("File already exists"));
6537 Fput (Qfile_date_error
, Qerror_conditions
,
6538 Fcons (Qfile_date_error
,
6539 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
))));
6540 Fput (Qfile_date_error
, Qerror_message
,
6541 build_string ("Cannot set file date"));
6543 DEFVAR_LISP ("read-file-name-function", &Vread_file_name_function
,
6544 doc
: /* If this is non-nil, `read-file-name' does its work by calling this function. */);
6545 Vread_file_name_function
= Qnil
;
6547 DEFVAR_LISP ("read-file-name-predicate", &Vread_file_name_predicate
,
6548 doc
: /* Current predicate used by `read-file-name-internal'. */);
6549 Vread_file_name_predicate
= Qnil
;
6551 DEFVAR_BOOL ("read-file-name-completion-ignore-case", &read_file_name_completion_ignore_case
,
6552 doc
: /* *Non-nil means when reading a file name completion ignores case. */);
6553 #if defined VMS || defined DOS_NT || defined MAC_OS
6554 read_file_name_completion_ignore_case
= 1;
6556 read_file_name_completion_ignore_case
= 0;
6559 DEFVAR_BOOL ("insert-default-directory", &insert_default_directory
,
6560 doc
: /* *Non-nil means when reading a filename start with default dir in minibuffer.
6561 If the initial minibuffer contents are non-empty, you can usually
6562 request a default filename by typing RETURN without editing. For some
6563 commands, exiting with an empty minibuffer has a special meaning,
6564 such as making the current buffer visit no file in the case of
6565 `set-visited-file-name'.
6566 If this variable is non-nil, the minibuffer contents are always
6567 initially non-empty and typing RETURN without editing will fetch the
6568 default name, if one is provided. Note however that this default name
6569 is not necessarily the name originally inserted in the minibuffer, if
6570 that is just the default directory.
6571 If this variable is nil, the minibuffer often starts out empty. In
6572 that case you may have to explicitly fetch the next history element to
6573 request the default name. */);
6574 insert_default_directory
= 1;
6576 DEFVAR_BOOL ("vms-stmlf-recfm", &vms_stmlf_recfm
,
6577 doc
: /* *Non-nil means write new files with record format `stmlf'.
6578 nil means use format `var'. This variable is meaningful only on VMS. */);
6579 vms_stmlf_recfm
= 0;
6581 DEFVAR_LISP ("directory-sep-char", &Vdirectory_sep_char
,
6582 doc
: /* Directory separator character for built-in functions that return file names.
6583 The value is always ?/. Don't use this variable, just use `/'. */);
6585 DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist
,
6586 doc
: /* *Alist of elements (REGEXP . HANDLER) for file names handled specially.
6587 If a file name matches REGEXP, then all I/O on that file is done by calling
6590 The first argument given to HANDLER is the name of the I/O primitive
6591 to be handled; the remaining arguments are the arguments that were
6592 passed to that primitive. For example, if you do
6593 (file-exists-p FILENAME)
6594 and FILENAME is handled by HANDLER, then HANDLER is called like this:
6595 (funcall HANDLER 'file-exists-p FILENAME)
6596 The function `find-file-name-handler' checks this list for a handler
6597 for its argument. */);
6598 Vfile_name_handler_alist
= Qnil
;
6600 DEFVAR_LISP ("set-auto-coding-function",
6601 &Vset_auto_coding_function
,
6602 doc
: /* If non-nil, a function to call to decide a coding system of file.
6603 Two arguments are passed to this function: the file name
6604 and the length of a file contents following the point.
6605 This function should return a coding system to decode the file contents.
6606 It should check the file name against `auto-coding-alist'.
6607 If no coding system is decided, it should check a coding system
6608 specified in the heading lines with the format:
6609 -*- ... coding: CODING-SYSTEM; ... -*-
6610 or local variable spec of the tailing lines with `coding:' tag. */);
6611 Vset_auto_coding_function
= Qnil
;
6613 DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions
,
6614 doc
: /* A list of functions to be called at the end of `insert-file-contents'.
6615 Each is passed one argument, the number of characters inserted.
6616 It should return the new character count, and leave point the same.
6617 If `insert-file-contents' is intercepted by a handler from
6618 `file-name-handler-alist', that handler is responsible for calling the
6619 functions in `after-insert-file-functions' if appropriate. */);
6620 Vafter_insert_file_functions
= Qnil
;
6622 DEFVAR_LISP ("write-region-annotate-functions", &Vwrite_region_annotate_functions
,
6623 doc
: /* A list of functions to be called at the start of `write-region'.
6624 Each is passed two arguments, START and END as for `write-region'.
6625 These are usually two numbers but not always; see the documentation
6626 for `write-region'. The function should return a list of pairs
6627 of the form (POSITION . STRING), consisting of strings to be effectively
6628 inserted at the specified positions of the file being written (1 means to
6629 insert before the first byte written). The POSITIONs must be sorted into
6630 increasing order. If there are several functions in the list, the several
6631 lists are merged destructively. Alternatively, the function can return
6632 with a different buffer current; in that case it should pay attention
6633 to the annotations returned by previous functions and listed in
6634 `write-region-annotations-so-far'.*/);
6635 Vwrite_region_annotate_functions
= Qnil
;
6636 staticpro (&Qwrite_region_annotate_functions
);
6637 Qwrite_region_annotate_functions
6638 = intern ("write-region-annotate-functions");
6640 DEFVAR_LISP ("write-region-annotations-so-far",
6641 &Vwrite_region_annotations_so_far
,
6642 doc
: /* When an annotation function is called, this holds the previous annotations.
6643 These are the annotations made by other annotation functions
6644 that were already called. See also `write-region-annotate-functions'. */);
6645 Vwrite_region_annotations_so_far
= Qnil
;
6647 DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers
,
6648 doc
: /* A list of file name handlers that temporarily should not be used.
6649 This applies only to the operation `inhibit-file-name-operation'. */);
6650 Vinhibit_file_name_handlers
= Qnil
;
6652 DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation
,
6653 doc
: /* The operation for which `inhibit-file-name-handlers' is applicable. */);
6654 Vinhibit_file_name_operation
= Qnil
;
6656 DEFVAR_LISP ("auto-save-list-file-name", &Vauto_save_list_file_name
,
6657 doc
: /* File name in which we write a list of all auto save file names.
6658 This variable is initialized automatically from `auto-save-list-file-prefix'
6659 shortly after Emacs reads your `.emacs' file, if you have not yet given it
6660 a non-nil value. */);
6661 Vauto_save_list_file_name
= Qnil
;
6663 defsubr (&Sfind_file_name_handler
);
6664 defsubr (&Sfile_name_directory
);
6665 defsubr (&Sfile_name_nondirectory
);
6666 defsubr (&Sunhandled_file_name_directory
);
6667 defsubr (&Sfile_name_as_directory
);
6668 defsubr (&Sdirectory_file_name
);
6669 defsubr (&Smake_temp_name
);
6670 defsubr (&Sexpand_file_name
);
6671 defsubr (&Ssubstitute_in_file_name
);
6672 defsubr (&Scopy_file
);
6673 defsubr (&Smake_directory_internal
);
6674 defsubr (&Sdelete_directory
);
6675 defsubr (&Sdelete_file
);
6676 defsubr (&Srename_file
);
6677 defsubr (&Sadd_name_to_file
);
6679 defsubr (&Smake_symbolic_link
);
6680 #endif /* S_IFLNK */
6682 defsubr (&Sdefine_logical_name
);
6685 defsubr (&Ssysnetunam
);
6686 #endif /* HPUX_NET */
6687 defsubr (&Sfile_name_absolute_p
);
6688 defsubr (&Sfile_exists_p
);
6689 defsubr (&Sfile_executable_p
);
6690 defsubr (&Sfile_readable_p
);
6691 defsubr (&Sfile_writable_p
);
6692 defsubr (&Saccess_file
);
6693 defsubr (&Sfile_symlink_p
);
6694 defsubr (&Sfile_directory_p
);
6695 defsubr (&Sfile_accessible_directory_p
);
6696 defsubr (&Sfile_regular_p
);
6697 defsubr (&Sfile_modes
);
6698 defsubr (&Sset_file_modes
);
6699 defsubr (&Sset_file_times
);
6700 defsubr (&Sset_default_file_modes
);
6701 defsubr (&Sdefault_file_modes
);
6702 defsubr (&Sfile_newer_than_file_p
);
6703 defsubr (&Sinsert_file_contents
);
6704 defsubr (&Swrite_region
);
6705 defsubr (&Scar_less_than_car
);
6706 defsubr (&Sverify_visited_file_modtime
);
6707 defsubr (&Sclear_visited_file_modtime
);
6708 defsubr (&Svisited_file_modtime
);
6709 defsubr (&Sset_visited_file_modtime
);
6710 defsubr (&Sdo_auto_save
);
6711 defsubr (&Sset_buffer_auto_saved
);
6712 defsubr (&Sclear_buffer_auto_save_failure
);
6713 defsubr (&Srecent_auto_save_p
);
6715 defsubr (&Sread_file_name_internal
);
6716 defsubr (&Sread_file_name
);
6717 defsubr (&Snext_read_file_uses_dialog_p
);
6720 defsubr (&Sunix_sync
);
6724 /* arch-tag: 64ba3fd7-f844-4fb2-ba4b-427eb928786c
6725 (do not change this comment) */