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"
82 #include "dispextern.h"
89 #endif /* not WINDOWSNT */
93 #include <sys/param.h>
101 #define CORRECT_DIR_SEPS(s) \
102 do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \
103 else unixtodos_filename (s); \
105 /* On Windows, drive letters must be alphabetic - on DOS, the Netware
106 redirector allows the six letters between 'Z' and 'a' as well. */
108 #define IS_DRIVE(x) ((x) >= 'A' && (x) <= 'z')
111 #define IS_DRIVE(x) isalpha (x)
113 /* Need to lower-case the drive letter, or else expanded
114 filenames will sometimes compare inequal, because
115 `expand-file-name' doesn't always down-case the drive letter. */
116 #define DRIVE_LETTER(x) (tolower (x))
137 #include "commands.h"
138 extern int use_dialog_box
;
139 extern int use_file_dialog
;
153 /* Nonzero during writing of auto-save files */
156 /* Set by auto_save_1 to mode of original file so Fwrite_region will create
157 a new file with the same mode as the original */
158 int auto_save_mode_bits
;
160 /* The symbol bound to coding-system-for-read when
161 insert-file-contents is called for recovering a file. This is not
162 an actual coding system name, but just an indicator to tell
163 insert-file-contents to use `emacs-mule' with a special flag for
164 auto saving and recovering a file. */
165 Lisp_Object Qauto_save_coding
;
167 /* Coding system for file names, or nil if none. */
168 Lisp_Object Vfile_name_coding_system
;
170 /* Coding system for file names used only when
171 Vfile_name_coding_system is nil. */
172 Lisp_Object Vdefault_file_name_coding_system
;
174 /* Alist of elements (REGEXP . HANDLER) for file names
175 whose I/O is done with a special handler. */
176 Lisp_Object Vfile_name_handler_alist
;
178 /* Lisp functions for translating file formats */
179 Lisp_Object Qformat_decode
, Qformat_annotate_function
;
181 /* Function to be called to decide a coding system of a reading file. */
182 Lisp_Object Vset_auto_coding_function
;
184 /* Functions to be called to process text properties in inserted file. */
185 Lisp_Object Vafter_insert_file_functions
;
187 /* Lisp function for setting buffer-file-coding-system and the
188 multibyteness of the current buffer after inserting a file. */
189 Lisp_Object Qafter_insert_file_set_coding
;
191 /* Functions to be called to create text property annotations for file. */
192 Lisp_Object Vwrite_region_annotate_functions
;
193 Lisp_Object Qwrite_region_annotate_functions
;
195 /* During build_annotations, each time an annotation function is called,
196 this holds the annotations made by the previous functions. */
197 Lisp_Object Vwrite_region_annotations_so_far
;
199 /* File name in which we write a list of all our auto save files. */
200 Lisp_Object Vauto_save_list_file_name
;
202 /* Function to call to read a file name. */
203 Lisp_Object Vread_file_name_function
;
205 /* Current predicate used by read_file_name_internal. */
206 Lisp_Object Vread_file_name_predicate
;
208 /* Nonzero means completion ignores case when reading file name. */
209 int read_file_name_completion_ignore_case
;
211 /* Nonzero means, when reading a filename in the minibuffer,
212 start out by inserting the default directory into the minibuffer. */
213 int insert_default_directory
;
215 /* On VMS, nonzero means write new files with record format stmlf.
216 Zero means use var format. */
219 /* On NT, specifies the directory separator character, used (eg.) when
220 expanding file names. This can be bound to / or \. */
221 Lisp_Object Vdirectory_sep_char
;
223 extern Lisp_Object Vuser_login_name
;
226 extern Lisp_Object Vw32_get_true_file_attributes
;
229 extern int minibuf_level
;
231 extern int minibuffer_auto_raise
;
233 extern int history_delete_duplicates
;
235 /* These variables describe handlers that have "already" had a chance
236 to handle the current operation.
238 Vinhibit_file_name_handlers is a list of file name handlers.
239 Vinhibit_file_name_operation is the operation being handled.
240 If we try to handle that operation, we ignore those handlers. */
242 static Lisp_Object Vinhibit_file_name_handlers
;
243 static Lisp_Object Vinhibit_file_name_operation
;
245 Lisp_Object Qfile_error
, Qfile_already_exists
, Qfile_date_error
;
247 Lisp_Object Qfile_name_history
;
249 Lisp_Object Qcar_less_than_car
;
251 static int a_write
P_ ((int, Lisp_Object
, int, int,
252 Lisp_Object
*, struct coding_system
*));
253 static int e_write
P_ ((int, Lisp_Object
, int, int, struct coding_system
*));
257 report_file_error (string
, data
)
261 Lisp_Object errstring
;
264 synchronize_system_messages_locale ();
265 errstring
= code_convert_string_norecord (build_string (strerror (errorno
)),
266 Vlocale_coding_system
, 0);
272 Fsignal (Qfile_already_exists
, Fcons (errstring
, data
));
275 /* System error messages are capitalized. Downcase the initial
276 unless it is followed by a slash. */
277 if (SREF (errstring
, 1) != '/')
278 SSET (errstring
, 0, DOWNCASE (SREF (errstring
, 0)));
280 Fsignal (Qfile_error
,
281 Fcons (build_string (string
), Fcons (errstring
, data
)));
286 close_file_unwind (fd
)
289 emacs_close (XFASTINT (fd
));
293 /* Restore point, having saved it as a marker. */
296 restore_point_unwind (location
)
297 Lisp_Object location
;
299 Fgoto_char (location
);
300 Fset_marker (location
, Qnil
, Qnil
);
304 Lisp_Object Qexpand_file_name
;
305 Lisp_Object Qsubstitute_in_file_name
;
306 Lisp_Object Qdirectory_file_name
;
307 Lisp_Object Qfile_name_directory
;
308 Lisp_Object Qfile_name_nondirectory
;
309 Lisp_Object Qunhandled_file_name_directory
;
310 Lisp_Object Qfile_name_as_directory
;
311 Lisp_Object Qcopy_file
;
312 Lisp_Object Qmake_directory_internal
;
313 Lisp_Object Qmake_directory
;
314 Lisp_Object Qdelete_directory
;
315 Lisp_Object Qdelete_file
;
316 Lisp_Object Qrename_file
;
317 Lisp_Object Qadd_name_to_file
;
318 Lisp_Object Qmake_symbolic_link
;
319 Lisp_Object Qfile_exists_p
;
320 Lisp_Object Qfile_executable_p
;
321 Lisp_Object Qfile_readable_p
;
322 Lisp_Object Qfile_writable_p
;
323 Lisp_Object Qfile_symlink_p
;
324 Lisp_Object Qaccess_file
;
325 Lisp_Object Qfile_directory_p
;
326 Lisp_Object Qfile_regular_p
;
327 Lisp_Object Qfile_accessible_directory_p
;
328 Lisp_Object Qfile_modes
;
329 Lisp_Object Qset_file_modes
;
330 Lisp_Object Qset_file_times
;
331 Lisp_Object Qfile_newer_than_file_p
;
332 Lisp_Object Qinsert_file_contents
;
333 Lisp_Object Qwrite_region
;
334 Lisp_Object Qverify_visited_file_modtime
;
335 Lisp_Object Qset_visited_file_modtime
;
337 DEFUN ("find-file-name-handler", Ffind_file_name_handler
, Sfind_file_name_handler
, 2, 2, 0,
338 doc
: /* Return FILENAME's handler function for OPERATION, if it has one.
339 Otherwise, return nil.
340 A file name is handled if one of the regular expressions in
341 `file-name-handler-alist' matches it.
343 If OPERATION equals `inhibit-file-name-operation', then we ignore
344 any handlers that are members of `inhibit-file-name-handlers',
345 but we still do run any other handlers. This lets handlers
346 use the standard functions without calling themselves recursively. */)
347 (filename
, operation
)
348 Lisp_Object filename
, operation
;
350 /* This function must not munge the match data. */
351 Lisp_Object chain
, inhibited_handlers
, result
;
355 CHECK_STRING (filename
);
357 if (EQ (operation
, Vinhibit_file_name_operation
))
358 inhibited_handlers
= Vinhibit_file_name_handlers
;
360 inhibited_handlers
= Qnil
;
362 for (chain
= Vfile_name_handler_alist
; CONSP (chain
);
363 chain
= XCDR (chain
))
373 && (match_pos
= fast_string_match (string
, filename
)) > pos
)
375 Lisp_Object handler
, tem
;
377 handler
= XCDR (elt
);
378 tem
= Fmemq (handler
, inhibited_handlers
);
392 DEFUN ("file-name-directory", Ffile_name_directory
, Sfile_name_directory
,
394 doc
: /* Return the directory component in file name FILENAME.
395 Return nil if FILENAME does not include a directory.
396 Otherwise return a directory spec.
397 Given a Unix syntax file name, returns a string ending in slash;
398 on VMS, perhaps instead a string ending in `:', `]' or `>'. */)
400 Lisp_Object filename
;
403 register const unsigned char *beg
;
405 register unsigned char *beg
;
407 register const unsigned char *p
;
410 CHECK_STRING (filename
);
412 /* If the file name has special constructs in it,
413 call the corresponding file handler. */
414 handler
= Ffind_file_name_handler (filename
, Qfile_name_directory
);
416 return call2 (handler
, Qfile_name_directory
, filename
);
418 #ifdef FILE_SYSTEM_CASE
419 filename
= FILE_SYSTEM_CASE (filename
);
421 beg
= SDATA (filename
);
423 beg
= strcpy (alloca (strlen (beg
) + 1), beg
);
425 p
= beg
+ SBYTES (filename
);
427 while (p
!= beg
&& !IS_DIRECTORY_SEP (p
[-1])
429 && p
[-1] != ':' && p
[-1] != ']' && p
[-1] != '>'
432 /* only recognise drive specifier at the beginning */
434 /* handle the "/:d:foo" and "/:foo" cases correctly */
435 && ((p
== beg
+ 2 && !IS_DIRECTORY_SEP (*beg
))
436 || (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
))))
443 /* Expansion of "c:" to drive and default directory. */
446 /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */
447 unsigned char *res
= alloca (MAXPATHLEN
+ 1);
448 unsigned char *r
= res
;
450 if (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
) && beg
[1] == ':')
452 strncpy (res
, beg
, 2);
457 if (getdefdir (toupper (*beg
) - 'A' + 1, r
))
459 if (!IS_DIRECTORY_SEP (res
[strlen (res
) - 1]))
462 p
= beg
+ strlen (beg
);
465 CORRECT_DIR_SEPS (beg
);
468 return make_specified_string (beg
, -1, p
- beg
, STRING_MULTIBYTE (filename
));
471 DEFUN ("file-name-nondirectory", Ffile_name_nondirectory
,
472 Sfile_name_nondirectory
, 1, 1, 0,
473 doc
: /* Return file name FILENAME sans its directory.
474 For example, in a Unix-syntax file name,
475 this is everything after the last slash,
476 or the entire name if it contains no slash. */)
478 Lisp_Object filename
;
480 register const unsigned char *beg
, *p
, *end
;
483 CHECK_STRING (filename
);
485 /* If the file name has special constructs in it,
486 call the corresponding file handler. */
487 handler
= Ffind_file_name_handler (filename
, Qfile_name_nondirectory
);
489 return call2 (handler
, Qfile_name_nondirectory
, filename
);
491 beg
= SDATA (filename
);
492 end
= p
= beg
+ SBYTES (filename
);
494 while (p
!= beg
&& !IS_DIRECTORY_SEP (p
[-1])
496 && p
[-1] != ':' && p
[-1] != ']' && p
[-1] != '>'
499 /* only recognise drive specifier at beginning */
501 /* handle the "/:d:foo" case correctly */
502 && (p
== beg
+ 2 || (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
))))
507 return make_specified_string (p
, -1, end
- p
, STRING_MULTIBYTE (filename
));
510 DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory
,
511 Sunhandled_file_name_directory
, 1, 1, 0,
512 doc
: /* Return a directly usable directory name somehow associated with FILENAME.
513 A `directly usable' directory name is one that may be used without the
514 intervention of any file handler.
515 If FILENAME is a directly usable file itself, return
516 \(file-name-directory FILENAME).
517 The `call-process' and `start-process' functions use this function to
518 get a current directory to run processes in. */)
520 Lisp_Object filename
;
524 /* If the file name has special constructs in it,
525 call the corresponding file handler. */
526 handler
= Ffind_file_name_handler (filename
, Qunhandled_file_name_directory
);
528 return call2 (handler
, Qunhandled_file_name_directory
, filename
);
530 return Ffile_name_directory (filename
);
535 file_name_as_directory (out
, in
)
538 int size
= strlen (in
) - 1;
551 /* Is it already a directory string? */
552 if (in
[size
] == ':' || in
[size
] == ']' || in
[size
] == '>')
554 /* Is it a VMS directory file name? If so, hack VMS syntax. */
555 else if (! index (in
, '/')
556 && ((size
> 3 && ! strcmp (&in
[size
- 3], ".DIR"))
557 || (size
> 3 && ! strcmp (&in
[size
- 3], ".dir"))
558 || (size
> 5 && (! strncmp (&in
[size
- 5], ".DIR", 4)
559 || ! strncmp (&in
[size
- 5], ".dir", 4))
560 && (in
[size
- 1] == '.' || in
[size
- 1] == ';')
561 && in
[size
] == '1')))
563 register char *p
, *dot
;
567 dir:x.dir --> dir:[x]
568 dir:[x]y.dir --> dir:[x.y] */
570 while (p
!= in
&& *p
!= ':' && *p
!= '>' && *p
!= ']') p
--;
573 strncpy (out
, in
, p
- in
);
592 dot
= index (p
, '.');
595 /* blindly remove any extension */
596 size
= strlen (out
) + (dot
- p
);
597 strncat (out
, p
, dot
- p
);
608 /* For Unix syntax, Append a slash if necessary */
609 if (!IS_DIRECTORY_SEP (out
[size
]))
611 /* Cannot use DIRECTORY_SEP, which could have any value */
613 out
[size
+ 2] = '\0';
616 CORRECT_DIR_SEPS (out
);
622 DEFUN ("file-name-as-directory", Ffile_name_as_directory
,
623 Sfile_name_as_directory
, 1, 1, 0,
624 doc
: /* Return a string representing the file name FILE interpreted as a directory.
625 This operation exists because a directory is also a file, but its name as
626 a directory is different from its name as a file.
627 The result can be used as the value of `default-directory'
628 or passed as second argument to `expand-file-name'.
629 For a Unix-syntax file name, just appends a slash.
630 On VMS, converts \"[X]FOO.DIR\" to \"[X.FOO]\", etc. */)
641 /* If the file name has special constructs in it,
642 call the corresponding file handler. */
643 handler
= Ffind_file_name_handler (file
, Qfile_name_as_directory
);
645 return call2 (handler
, Qfile_name_as_directory
, file
);
647 buf
= (char *) alloca (SBYTES (file
) + 10);
648 file_name_as_directory (buf
, SDATA (file
));
649 return make_specified_string (buf
, -1, strlen (buf
),
650 STRING_MULTIBYTE (file
));
654 * Convert from directory name to filename.
656 * xyzzy:[mukesh.emacs] => xyzzy:[mukesh]emacs.dir.1
657 * xyzzy:[mukesh] => xyzzy:[000000]mukesh.dir.1
658 * On UNIX, it's simple: just make sure there isn't a terminating /
660 * Value is nonzero if the string output is different from the input.
664 directory_file_name (src
, dst
)
672 struct FAB fab
= cc$rms_fab
;
673 struct NAM nam
= cc$rms_nam
;
674 char esa
[NAM$C_MAXRSS
];
679 if (! index (src
, '/')
680 && (src
[slen
- 1] == ']'
681 || src
[slen
- 1] == ':'
682 || src
[slen
- 1] == '>'))
684 /* VMS style - convert [x.y.z] to [x.y]z, [x] to [000000]x */
686 fab
.fab$b_fns
= slen
;
687 fab
.fab$l_nam
= &nam
;
688 fab
.fab$l_fop
= FAB$M_NAM
;
691 nam
.nam$b_ess
= sizeof esa
;
692 nam
.nam$b_nop
|= NAM$M_SYNCHK
;
694 /* We call SYS$PARSE to handle such things as [--] for us. */
695 if (SYS$
PARSE (&fab
, 0, 0) == RMS$_NORMAL
)
697 slen
= nam
.nam$b_esl
;
698 if (esa
[slen
- 1] == ';' && esa
[slen
- 2] == '.')
703 if (src
[slen
- 1] != ']' && src
[slen
- 1] != '>')
705 /* what about when we have logical_name:???? */
706 if (src
[slen
- 1] == ':')
707 { /* Xlate logical name and see what we get */
708 ptr
= strcpy (dst
, src
); /* upper case for getenv */
711 if ('a' <= *ptr
&& *ptr
<= 'z')
715 dst
[slen
- 1] = 0; /* remove colon */
716 if (!(src
= egetenv (dst
)))
718 /* should we jump to the beginning of this procedure?
719 Good points: allows us to use logical names that xlate
721 Bad points: can be a problem if we just translated to a device
723 For now, I'll punt and always expect VMS names, and hope for
726 if (src
[slen
- 1] != ']' && src
[slen
- 1] != '>')
727 { /* no recursion here! */
733 { /* not a directory spec */
738 bracket
= src
[slen
- 1];
740 /* If bracket is ']' or '>', bracket - 2 is the corresponding
742 ptr
= index (src
, bracket
- 2);
744 { /* no opening bracket */
748 if (!(rptr
= rindex (src
, '.')))
751 strncpy (dst
, src
, slen
);
755 dst
[slen
++] = bracket
;
760 /* If we have the top-level of a rooted directory (i.e. xx:[000000]),
761 then translate the device and recurse. */
762 if (dst
[slen
- 1] == ':'
763 && dst
[slen
- 2] != ':' /* skip decnet nodes */
764 && strcmp (src
+ slen
, "[000000]") == 0)
766 dst
[slen
- 1] = '\0';
767 if ((ptr
= egetenv (dst
))
768 && (rlen
= strlen (ptr
) - 1) > 0
769 && (ptr
[rlen
] == ']' || ptr
[rlen
] == '>')
770 && ptr
[rlen
- 1] == '.')
772 char * buf
= (char *) alloca (strlen (ptr
) + 1);
776 return directory_file_name (buf
, dst
);
781 strcat (dst
, "[000000]");
785 rlen
= strlen (rptr
) - 1;
786 strncat (dst
, rptr
, rlen
);
787 dst
[slen
+ rlen
] = '\0';
788 strcat (dst
, ".DIR.1");
792 /* Process as Unix format: just remove any final slash.
793 But leave "/" unchanged; do not change it to "". */
796 /* Handle // as root for apollo's. */
797 if ((slen
> 2 && dst
[slen
- 1] == '/')
798 || (slen
> 1 && dst
[0] != '/' && dst
[slen
- 1] == '/'))
802 && IS_DIRECTORY_SEP (dst
[slen
- 1])
804 && !IS_ANY_SEP (dst
[slen
- 2])
810 CORRECT_DIR_SEPS (dst
);
815 DEFUN ("directory-file-name", Fdirectory_file_name
, Sdirectory_file_name
,
817 doc
: /* Returns the file name of the directory named DIRECTORY.
818 This is the name of the file that holds the data for the directory DIRECTORY.
819 This operation exists because a directory is also a file, but its name as
820 a directory is different from its name as a file.
821 In Unix-syntax, this function just removes the final slash.
822 On VMS, given a VMS-syntax directory name such as \"[X.Y]\",
823 it returns a file name such as \"[X]Y.DIR.1\". */)
825 Lisp_Object directory
;
830 CHECK_STRING (directory
);
832 if (NILP (directory
))
835 /* If the file name has special constructs in it,
836 call the corresponding file handler. */
837 handler
= Ffind_file_name_handler (directory
, Qdirectory_file_name
);
839 return call2 (handler
, Qdirectory_file_name
, directory
);
842 /* 20 extra chars is insufficient for VMS, since we might perform a
843 logical name translation. an equivalence string can be up to 255
844 chars long, so grab that much extra space... - sss */
845 buf
= (char *) alloca (SBYTES (directory
) + 20 + 255);
847 buf
= (char *) alloca (SBYTES (directory
) + 20);
849 directory_file_name (SDATA (directory
), buf
);
850 return make_specified_string (buf
, -1, strlen (buf
),
851 STRING_MULTIBYTE (directory
));
854 static char make_temp_name_tbl
[64] =
856 'A','B','C','D','E','F','G','H',
857 'I','J','K','L','M','N','O','P',
858 'Q','R','S','T','U','V','W','X',
859 'Y','Z','a','b','c','d','e','f',
860 'g','h','i','j','k','l','m','n',
861 'o','p','q','r','s','t','u','v',
862 'w','x','y','z','0','1','2','3',
863 '4','5','6','7','8','9','-','_'
866 static unsigned make_temp_name_count
, make_temp_name_count_initialized_p
;
868 /* Value is a temporary file name starting with PREFIX, a string.
870 The Emacs process number forms part of the result, so there is
871 no danger of generating a name being used by another process.
872 In addition, this function makes an attempt to choose a name
873 which has no existing file. To make this work, PREFIX should be
874 an absolute file name.
876 BASE64_P non-zero means add the pid as 3 characters in base64
877 encoding. In this case, 6 characters will be added to PREFIX to
878 form the file name. Otherwise, if Emacs is running on a system
879 with long file names, add the pid as a decimal number.
881 This function signals an error if no unique file name could be
885 make_temp_name (prefix
, base64_p
)
892 unsigned char *p
, *data
;
896 CHECK_STRING (prefix
);
898 /* VAL is created by adding 6 characters to PREFIX. The first
899 three are the PID of this process, in base 64, and the second
900 three are incremented if the file already exists. This ensures
901 262144 unique file names per PID per PREFIX. */
903 pid
= (int) getpid ();
907 pidbuf
[0] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
908 pidbuf
[1] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
909 pidbuf
[2] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
914 #ifdef HAVE_LONG_FILE_NAMES
915 sprintf (pidbuf
, "%d", pid
);
916 pidlen
= strlen (pidbuf
);
918 pidbuf
[0] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
919 pidbuf
[1] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
920 pidbuf
[2] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
925 len
= SBYTES (prefix
); clen
= SCHARS (prefix
);
926 val
= make_uninit_multibyte_string (clen
+ 3 + pidlen
, len
+ 3 + pidlen
);
927 if (!STRING_MULTIBYTE (prefix
))
928 STRING_SET_UNIBYTE (val
);
930 bcopy(SDATA (prefix
), data
, len
);
933 bcopy (pidbuf
, p
, pidlen
);
936 /* Here we try to minimize useless stat'ing when this function is
937 invoked many times successively with the same PREFIX. We achieve
938 this by initializing count to a random value, and incrementing it
941 We don't want make-temp-name to be called while dumping,
942 because then make_temp_name_count_initialized_p would get set
943 and then make_temp_name_count would not be set when Emacs starts. */
945 if (!make_temp_name_count_initialized_p
)
947 make_temp_name_count
= (unsigned) time (NULL
);
948 make_temp_name_count_initialized_p
= 1;
954 unsigned num
= make_temp_name_count
;
956 p
[0] = make_temp_name_tbl
[num
& 63], num
>>= 6;
957 p
[1] = make_temp_name_tbl
[num
& 63], num
>>= 6;
958 p
[2] = make_temp_name_tbl
[num
& 63], num
>>= 6;
960 /* Poor man's congruential RN generator. Replace with
961 ++make_temp_name_count for debugging. */
962 make_temp_name_count
+= 25229;
963 make_temp_name_count
%= 225307;
965 if (stat (data
, &ignored
) < 0)
967 /* We want to return only if errno is ENOENT. */
971 /* The error here is dubious, but there is little else we
972 can do. The alternatives are to return nil, which is
973 as bad as (and in many cases worse than) throwing the
974 error, or to ignore the error, which will likely result
975 in looping through 225307 stat's, which is not only
976 dog-slow, but also useless since it will fallback to
977 the errow below, anyway. */
978 report_file_error ("Cannot create temporary name for prefix",
979 Fcons (prefix
, Qnil
));
984 error ("Cannot create temporary name for prefix `%s'",
990 DEFUN ("make-temp-name", Fmake_temp_name
, Smake_temp_name
, 1, 1, 0,
991 doc
: /* Generate temporary file name (string) starting with PREFIX (a string).
992 The Emacs process number forms part of the result,
993 so there is no danger of generating a name being used by another process.
995 In addition, this function makes an attempt to choose a name
996 which has no existing file. To make this work,
997 PREFIX should be an absolute file name.
999 There is a race condition between calling `make-temp-name' and creating the
1000 file which opens all kinds of security holes. For that reason, you should
1001 probably use `make-temp-file' instead, except in three circumstances:
1003 * If you are creating the file in the user's home directory.
1004 * If you are creating a directory rather than an ordinary file.
1005 * If you are taking special precautions as `make-temp-file' does. */)
1009 return make_temp_name (prefix
, 0);
1014 DEFUN ("expand-file-name", Fexpand_file_name
, Sexpand_file_name
, 1, 2, 0,
1015 doc
: /* Convert filename NAME to absolute, and canonicalize it.
1016 Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative
1017 (does not start with slash); if DEFAULT-DIRECTORY is nil or missing,
1018 the current buffer's value of default-directory is used.
1019 File name components that are `.' are removed, and
1020 so are file name components followed by `..', along with the `..' itself;
1021 note that these simplifications are done without checking the resulting
1022 file names in the file system.
1023 An initial `~/' expands to your home directory.
1024 An initial `~USER/' expands to USER's home directory.
1025 See also the function `substitute-in-file-name'. */)
1026 (name
, default_directory
)
1027 Lisp_Object name
, default_directory
;
1031 register unsigned char *newdir
, *p
, *o
;
1033 unsigned char *target
;
1036 unsigned char * colon
= 0;
1037 unsigned char * close
= 0;
1038 unsigned char * slash
= 0;
1039 unsigned char * brack
= 0;
1040 int lbrack
= 0, rbrack
= 0;
1045 int collapse_newdir
= 1;
1049 Lisp_Object handler
, result
;
1051 CHECK_STRING (name
);
1053 /* If the file name has special constructs in it,
1054 call the corresponding file handler. */
1055 handler
= Ffind_file_name_handler (name
, Qexpand_file_name
);
1056 if (!NILP (handler
))
1057 return call3 (handler
, Qexpand_file_name
, name
, default_directory
);
1059 /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */
1060 if (NILP (default_directory
))
1061 default_directory
= current_buffer
->directory
;
1062 if (! STRINGP (default_directory
))
1065 /* "/" is not considered a root directory on DOS_NT, so using "/"
1066 here causes an infinite recursion in, e.g., the following:
1068 (let (default-directory)
1069 (expand-file-name "a"))
1071 To avoid this, we set default_directory to the root of the
1073 extern char *emacs_root_dir (void);
1075 default_directory
= build_string (emacs_root_dir ());
1077 default_directory
= build_string ("/");
1081 if (!NILP (default_directory
))
1083 handler
= Ffind_file_name_handler (default_directory
, Qexpand_file_name
);
1084 if (!NILP (handler
))
1085 return call3 (handler
, Qexpand_file_name
, name
, default_directory
);
1088 o
= SDATA (default_directory
);
1090 /* Make sure DEFAULT_DIRECTORY is properly expanded.
1091 It would be better to do this down below where we actually use
1092 default_directory. Unfortunately, calling Fexpand_file_name recursively
1093 could invoke GC, and the strings might be relocated. This would
1094 be annoying because we have pointers into strings lying around
1095 that would need adjusting, and people would add new pointers to
1096 the code and forget to adjust them, resulting in intermittent bugs.
1097 Putting this call here avoids all that crud.
1099 The EQ test avoids infinite recursion. */
1100 if (! NILP (default_directory
) && !EQ (default_directory
, name
)
1101 /* Save time in some common cases - as long as default_directory
1102 is not relative, it can be canonicalized with name below (if it
1103 is needed at all) without requiring it to be expanded now. */
1105 /* Detect MSDOS file names with drive specifiers. */
1106 && ! (IS_DRIVE (o
[0]) && IS_DEVICE_SEP (o
[1]) && IS_DIRECTORY_SEP (o
[2]))
1108 /* Detect Windows file names in UNC format. */
1109 && ! (IS_DIRECTORY_SEP (o
[0]) && IS_DIRECTORY_SEP (o
[1]))
1111 #else /* not DOS_NT */
1112 /* Detect Unix absolute file names (/... alone is not absolute on
1114 && ! (IS_DIRECTORY_SEP (o
[0]))
1115 #endif /* not DOS_NT */
1118 struct gcpro gcpro1
;
1121 default_directory
= Fexpand_file_name (default_directory
, Qnil
);
1126 /* Filenames on VMS are always upper case. */
1127 name
= Fupcase (name
);
1129 #ifdef FILE_SYSTEM_CASE
1130 name
= FILE_SYSTEM_CASE (name
);
1136 /* We will force directory separators to be either all \ or /, so make
1137 a local copy to modify, even if there ends up being no change. */
1138 nm
= strcpy (alloca (strlen (nm
) + 1), nm
);
1140 /* Note if special escape prefix is present, but remove for now. */
1141 if (nm
[0] == '/' && nm
[1] == ':')
1147 /* Find and remove drive specifier if present; this makes nm absolute
1148 even if the rest of the name appears to be relative. Only look for
1149 drive specifier at the beginning. */
1150 if (IS_DRIVE (nm
[0]) && IS_DEVICE_SEP (nm
[1]))
1157 /* If we see "c://somedir", we want to strip the first slash after the
1158 colon when stripping the drive letter. Otherwise, this expands to
1160 if (drive
&& IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1162 #endif /* WINDOWSNT */
1166 /* Discard any previous drive specifier if nm is now in UNC format. */
1167 if (IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1173 /* If nm is absolute, look for `/./' or `/../' or `//''sequences; if
1174 none are found, we can probably return right away. We will avoid
1175 allocating a new string if name is already fully expanded. */
1177 IS_DIRECTORY_SEP (nm
[0])
1179 && drive
&& !is_escaped
1182 && (drive
|| IS_DIRECTORY_SEP (nm
[1])) && !is_escaped
1189 /* If it turns out that the filename we want to return is just a
1190 suffix of FILENAME, we don't need to go through and edit
1191 things; we just need to construct a new string using data
1192 starting at the middle of FILENAME. If we set lose to a
1193 non-zero value, that means we've discovered that we can't do
1200 /* Since we know the name is absolute, we can assume that each
1201 element starts with a "/". */
1203 /* "." and ".." are hairy. */
1204 if (IS_DIRECTORY_SEP (p
[0])
1206 && (IS_DIRECTORY_SEP (p
[2])
1208 || (p
[2] == '.' && (IS_DIRECTORY_SEP (p
[3])
1211 /* We want to replace multiple `/' in a row with a single
1214 && IS_DIRECTORY_SEP (p
[0])
1215 && IS_DIRECTORY_SEP (p
[1]))
1222 /* if dev:[dir]/, move nm to / */
1223 if (!slash
&& p
> nm
&& (brack
|| colon
)) {
1224 nm
= (brack
? brack
+ 1 : colon
+ 1);
1225 lbrack
= rbrack
= 0;
1233 /* VMS pre V4.4,convert '-'s in filenames. */
1234 if (lbrack
== rbrack
)
1236 if (dots
< 2) /* this is to allow negative version numbers */
1241 if (lbrack
> rbrack
&&
1242 ((p
[-1] == '.' || p
[-1] == '[' || p
[-1] == '<') &&
1243 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>')))
1249 /* count open brackets, reset close bracket pointer */
1250 if (p
[0] == '[' || p
[0] == '<')
1251 lbrack
++, brack
= 0;
1252 /* count close brackets, set close bracket pointer */
1253 if (p
[0] == ']' || p
[0] == '>')
1254 rbrack
++, brack
= p
;
1255 /* detect ][ or >< */
1256 if ((p
[0] == ']' || p
[0] == '>') && (p
[1] == '[' || p
[1] == '<'))
1258 if ((p
[0] == ':' || p
[0] == ']' || p
[0] == '>') && p
[1] == '~')
1259 nm
= p
+ 1, lose
= 1;
1260 if (p
[0] == ':' && (colon
|| slash
))
1261 /* if dev1:[dir]dev2:, move nm to dev2: */
1267 /* if /name/dev:, move nm to dev: */
1270 /* if node::dev:, move colon following dev */
1271 else if (colon
&& colon
[-1] == ':')
1273 /* if dev1:dev2:, move nm to dev2: */
1274 else if (colon
&& colon
[-1] != ':')
1279 if (p
[0] == ':' && !colon
)
1285 if (lbrack
== rbrack
)
1288 else if (p
[0] == '.')
1296 if (index (nm
, '/'))
1298 nm
= sys_translate_unix (nm
);
1299 return make_specified_string (nm
, -1, strlen (nm
),
1300 STRING_MULTIBYTE (name
));
1304 /* Make sure directories are all separated with / or \ as
1305 desired, but avoid allocation of a new string when not
1307 CORRECT_DIR_SEPS (nm
);
1309 if (IS_DIRECTORY_SEP (nm
[1]))
1311 if (strcmp (nm
, SDATA (name
)) != 0)
1312 name
= make_specified_string (nm
, -1, strlen (nm
),
1313 STRING_MULTIBYTE (name
));
1317 /* drive must be set, so this is okay */
1318 if (strcmp (nm
- 2, SDATA (name
)) != 0)
1322 name
= make_specified_string (nm
, -1, p
- nm
,
1323 STRING_MULTIBYTE (name
));
1324 temp
[0] = DRIVE_LETTER (drive
);
1325 name
= concat2 (build_string (temp
), name
);
1328 #else /* not DOS_NT */
1329 if (nm
== SDATA (name
))
1331 return make_specified_string (nm
, -1, strlen (nm
),
1332 STRING_MULTIBYTE (name
));
1333 #endif /* not DOS_NT */
1337 /* At this point, nm might or might not be an absolute file name. We
1338 need to expand ~ or ~user if present, otherwise prefix nm with
1339 default_directory if nm is not absolute, and finally collapse /./
1340 and /foo/../ sequences.
1342 We set newdir to be the appropriate prefix if one is needed:
1343 - the relevant user directory if nm starts with ~ or ~user
1344 - the specified drive's working dir (DOS/NT only) if nm does not
1346 - the value of default_directory.
1348 Note that these prefixes are not guaranteed to be absolute (except
1349 for the working dir of a drive). Therefore, to ensure we always
1350 return an absolute name, if the final prefix is not absolute we
1351 append it to the current working directory. */
1355 if (nm
[0] == '~') /* prefix ~ */
1357 if (IS_DIRECTORY_SEP (nm
[1])
1361 || nm
[1] == 0) /* ~ by itself */
1363 if (!(newdir
= (unsigned char *) egetenv ("HOME")))
1364 newdir
= (unsigned char *) "";
1367 collapse_newdir
= 0;
1370 nm
++; /* Don't leave the slash in nm. */
1373 else /* ~user/filename */
1375 for (p
= nm
; *p
&& (!IS_DIRECTORY_SEP (*p
)
1380 o
= (unsigned char *) alloca (p
- nm
+ 1);
1381 bcopy ((char *) nm
, o
, p
- nm
);
1384 pw
= (struct passwd
*) getpwnam (o
+ 1);
1387 newdir
= (unsigned char *) pw
-> pw_dir
;
1389 nm
= p
+ 1; /* skip the terminator */
1393 collapse_newdir
= 0;
1398 /* If we don't find a user of that name, leave the name
1399 unchanged; don't move nm forward to p. */
1404 /* On DOS and Windows, nm is absolute if a drive name was specified;
1405 use the drive's current directory as the prefix if needed. */
1406 if (!newdir
&& drive
)
1408 /* Get default directory if needed to make nm absolute. */
1409 if (!IS_DIRECTORY_SEP (nm
[0]))
1411 newdir
= alloca (MAXPATHLEN
+ 1);
1412 if (!getdefdir (toupper (drive
) - 'A' + 1, newdir
))
1417 /* Either nm starts with /, or drive isn't mounted. */
1418 newdir
= alloca (4);
1419 newdir
[0] = DRIVE_LETTER (drive
);
1427 /* Finally, if no prefix has been specified and nm is not absolute,
1428 then it must be expanded relative to default_directory. */
1432 /* /... alone is not absolute on DOS and Windows. */
1433 && !IS_DIRECTORY_SEP (nm
[0])
1436 && !(IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1443 newdir
= SDATA (default_directory
);
1445 /* Note if special escape prefix is present, but remove for now. */
1446 if (newdir
[0] == '/' && newdir
[1] == ':')
1457 /* First ensure newdir is an absolute name. */
1459 /* Detect MSDOS file names with drive specifiers. */
1460 ! (IS_DRIVE (newdir
[0])
1461 && IS_DEVICE_SEP (newdir
[1]) && IS_DIRECTORY_SEP (newdir
[2]))
1463 /* Detect Windows file names in UNC format. */
1464 && ! (IS_DIRECTORY_SEP (newdir
[0]) && IS_DIRECTORY_SEP (newdir
[1]))
1468 /* Effectively, let newdir be (expand-file-name newdir cwd).
1469 Because of the admonition against calling expand-file-name
1470 when we have pointers into lisp strings, we accomplish this
1471 indirectly by prepending newdir to nm if necessary, and using
1472 cwd (or the wd of newdir's drive) as the new newdir. */
1474 if (IS_DRIVE (newdir
[0]) && newdir
[1] == ':')
1479 if (!IS_DIRECTORY_SEP (nm
[0]))
1481 char * tmp
= alloca (strlen (newdir
) + strlen (nm
) + 2);
1482 file_name_as_directory (tmp
, newdir
);
1486 newdir
= alloca (MAXPATHLEN
+ 1);
1489 if (!getdefdir (toupper (drive
) - 'A' + 1, newdir
))
1496 /* Strip off drive name from prefix, if present. */
1497 if (IS_DRIVE (newdir
[0]) && newdir
[1] == ':')
1503 /* Keep only a prefix from newdir if nm starts with slash
1504 (//server/share for UNC, nothing otherwise). */
1505 if (IS_DIRECTORY_SEP (nm
[0]) && collapse_newdir
)
1508 if (IS_DIRECTORY_SEP (newdir
[0]) && IS_DIRECTORY_SEP (newdir
[1]))
1510 newdir
= strcpy (alloca (strlen (newdir
) + 1), newdir
);
1512 while (*p
&& !IS_DIRECTORY_SEP (*p
)) p
++;
1514 while (*p
&& !IS_DIRECTORY_SEP (*p
)) p
++;
1526 /* Get rid of any slash at the end of newdir, unless newdir is
1527 just / or // (an incomplete UNC name). */
1528 length
= strlen (newdir
);
1529 if (length
> 1 && IS_DIRECTORY_SEP (newdir
[length
- 1])
1531 && !(length
== 2 && IS_DIRECTORY_SEP (newdir
[0]))
1535 unsigned char *temp
= (unsigned char *) alloca (length
);
1536 bcopy (newdir
, temp
, length
- 1);
1537 temp
[length
- 1] = 0;
1545 /* Now concatenate the directory and name to new space in the stack frame */
1546 tlen
+= strlen (nm
) + 1;
1548 /* Reserve space for drive specifier and escape prefix, since either
1549 or both may need to be inserted. (The Microsoft x86 compiler
1550 produces incorrect code if the following two lines are combined.) */
1551 target
= (unsigned char *) alloca (tlen
+ 4);
1553 #else /* not DOS_NT */
1554 target
= (unsigned char *) alloca (tlen
);
1555 #endif /* not DOS_NT */
1561 if (nm
[0] == 0 || IS_DIRECTORY_SEP (nm
[0]))
1564 /* If newdir is effectively "C:/", then the drive letter will have
1565 been stripped and newdir will be "/". Concatenating with an
1566 absolute directory in nm produces "//", which will then be
1567 incorrectly treated as a network share. Ignore newdir in
1568 this case (keeping the drive letter). */
1569 if (!(drive
&& nm
[0] && IS_DIRECTORY_SEP (newdir
[0])
1570 && newdir
[1] == '\0'))
1572 strcpy (target
, newdir
);
1576 file_name_as_directory (target
, newdir
);
1579 strcat (target
, nm
);
1581 if (index (target
, '/'))
1582 strcpy (target
, sys_translate_unix (target
));
1585 /* ASSERT (IS_DIRECTORY_SEP (target[0])) if not VMS */
1587 /* Now canonicalize by removing `//', `/.' and `/foo/..' if they
1596 if (*p
!= ']' && *p
!= '>' && *p
!= '-')
1602 else if ((p
[0] == ']' || p
[0] == '>') && p
[0] == p
[1] + 2)
1603 /* brackets are offset from each other by 2 */
1606 if (*p
!= '.' && *p
!= '-' && o
[-1] != '.')
1607 /* convert [foo][bar] to [bar] */
1608 while (o
[-1] != '[' && o
[-1] != '<')
1610 else if (*p
== '-' && *o
!= '.')
1613 else if (p
[0] == '-' && o
[-1] == '.' &&
1614 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>'))
1615 /* flush .foo.- ; leave - if stopped by '[' or '<' */
1619 while (o
[-1] != '.' && o
[-1] != '[' && o
[-1] != '<');
1620 if (p
[1] == '.') /* foo.-.bar ==> bar. */
1622 else if (o
[-1] == '.') /* '.foo.-]' ==> ']' */
1624 /* else [foo.-] ==> [-] */
1630 o
[-1] != '[' && o
[-1] != '<' && o
[-1] != '.' &&
1631 p
[1] != ']' && p
[1] != '>' && p
[1] != '.')
1637 if (!IS_DIRECTORY_SEP (*p
))
1641 else if (IS_DIRECTORY_SEP (p
[0])
1643 && (IS_DIRECTORY_SEP (p
[2])
1646 /* If "/." is the entire filename, keep the "/". Otherwise,
1647 just delete the whole "/.". */
1648 if (o
== target
&& p
[2] == '\0')
1652 else if (IS_DIRECTORY_SEP (p
[0]) && p
[1] == '.' && p
[2] == '.'
1653 /* `/../' is the "superroot" on certain file systems. */
1655 && (IS_DIRECTORY_SEP (p
[3]) || p
[3] == 0))
1657 while (o
!= target
&& (--o
) && !IS_DIRECTORY_SEP (*o
))
1659 /* Keep initial / only if this is the whole name. */
1660 if (o
== target
&& IS_ANY_SEP (*o
) && p
[3] == 0)
1665 && IS_DIRECTORY_SEP (p
[0]) && IS_DIRECTORY_SEP (p
[1]))
1667 /* Collapse multiple `/' in a row. */
1669 while (IS_DIRECTORY_SEP (*p
))
1676 #endif /* not VMS */
1680 /* At last, set drive name. */
1682 /* Except for network file name. */
1683 if (!(IS_DIRECTORY_SEP (target
[0]) && IS_DIRECTORY_SEP (target
[1])))
1684 #endif /* WINDOWSNT */
1686 if (!drive
) abort ();
1688 target
[0] = DRIVE_LETTER (drive
);
1691 /* Reinsert the escape prefix if required. */
1698 CORRECT_DIR_SEPS (target
);
1701 result
= make_specified_string (target
, -1, o
- target
,
1702 STRING_MULTIBYTE (name
));
1704 /* Again look to see if the file name has special constructs in it
1705 and perhaps call the corresponding file handler. This is needed
1706 for filenames such as "/foo/../user@host:/bar/../baz". Expanding
1707 the ".." component gives us "/user@host:/bar/../baz" which needs
1708 to be expanded again. */
1709 handler
= Ffind_file_name_handler (result
, Qexpand_file_name
);
1710 if (!NILP (handler
))
1711 return call3 (handler
, Qexpand_file_name
, result
, default_directory
);
1717 /* PLEASE DO NOT DELETE THIS COMMENTED-OUT VERSION!
1718 This is the old version of expand-file-name, before it was thoroughly
1719 rewritten for Emacs 10.31. We leave this version here commented-out,
1720 because the code is very complex and likely to have subtle bugs. If
1721 bugs _are_ found, it might be of interest to look at the old code and
1722 see what did it do in the relevant situation.
1724 Don't remove this code: it's true that it will be accessible via CVS,
1725 but a few years from deletion, people will forget it is there. */
1727 /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */
1728 DEAFUN ("expand-file-name", Fexpand_file_name
, Sexpand_file_name
, 1, 2, 0,
1729 "Convert FILENAME to absolute, and canonicalize it.\n\
1730 Second arg DEFAULT is directory to start with if FILENAME is relative\n\
1731 (does not start with slash); if DEFAULT is nil or missing,\n\
1732 the current buffer's value of default-directory is used.\n\
1733 Filenames containing `.' or `..' as components are simplified;\n\
1734 initial `~/' expands to your home directory.\n\
1735 See also the function `substitute-in-file-name'.")
1737 Lisp_Object name
, defalt
;
1741 register unsigned char *newdir
, *p
, *o
;
1743 unsigned char *target
;
1747 unsigned char * colon
= 0;
1748 unsigned char * close
= 0;
1749 unsigned char * slash
= 0;
1750 unsigned char * brack
= 0;
1751 int lbrack
= 0, rbrack
= 0;
1755 CHECK_STRING (name
);
1758 /* Filenames on VMS are always upper case. */
1759 name
= Fupcase (name
);
1764 /* If nm is absolute, flush ...// and detect /./ and /../.
1765 If no /./ or /../ we can return right away. */
1777 if (p
[0] == '/' && p
[1] == '/'
1779 /* // at start of filename is meaningful on Apollo system. */
1784 if (p
[0] == '/' && p
[1] == '~')
1785 nm
= p
+ 1, lose
= 1;
1786 if (p
[0] == '/' && p
[1] == '.'
1787 && (p
[2] == '/' || p
[2] == 0
1788 || (p
[2] == '.' && (p
[3] == '/' || p
[3] == 0))))
1794 /* if dev:[dir]/, move nm to / */
1795 if (!slash
&& p
> nm
&& (brack
|| colon
)) {
1796 nm
= (brack
? brack
+ 1 : colon
+ 1);
1797 lbrack
= rbrack
= 0;
1805 /* VMS pre V4.4,convert '-'s in filenames. */
1806 if (lbrack
== rbrack
)
1808 if (dots
< 2) /* this is to allow negative version numbers */
1813 if (lbrack
> rbrack
&&
1814 ((p
[-1] == '.' || p
[-1] == '[' || p
[-1] == '<') &&
1815 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>')))
1821 /* count open brackets, reset close bracket pointer */
1822 if (p
[0] == '[' || p
[0] == '<')
1823 lbrack
++, brack
= 0;
1824 /* count close brackets, set close bracket pointer */
1825 if (p
[0] == ']' || p
[0] == '>')
1826 rbrack
++, brack
= p
;
1827 /* detect ][ or >< */
1828 if ((p
[0] == ']' || p
[0] == '>') && (p
[1] == '[' || p
[1] == '<'))
1830 if ((p
[0] == ':' || p
[0] == ']' || p
[0] == '>') && p
[1] == '~')
1831 nm
= p
+ 1, lose
= 1;
1832 if (p
[0] == ':' && (colon
|| slash
))
1833 /* if dev1:[dir]dev2:, move nm to dev2: */
1839 /* If /name/dev:, move nm to dev: */
1842 /* If node::dev:, move colon following dev */
1843 else if (colon
&& colon
[-1] == ':')
1845 /* If dev1:dev2:, move nm to dev2: */
1846 else if (colon
&& colon
[-1] != ':')
1851 if (p
[0] == ':' && !colon
)
1857 if (lbrack
== rbrack
)
1860 else if (p
[0] == '.')
1868 if (index (nm
, '/'))
1869 return build_string (sys_translate_unix (nm
));
1871 if (nm
== SDATA (name
))
1873 return build_string (nm
);
1877 /* Now determine directory to start with and put it in NEWDIR */
1881 if (nm
[0] == '~') /* prefix ~ */
1886 || nm
[1] == 0)/* ~/filename */
1888 if (!(newdir
= (unsigned char *) egetenv ("HOME")))
1889 newdir
= (unsigned char *) "";
1892 nm
++; /* Don't leave the slash in nm. */
1895 else /* ~user/filename */
1897 /* Get past ~ to user */
1898 unsigned char *user
= nm
+ 1;
1899 /* Find end of name. */
1900 unsigned char *ptr
= (unsigned char *) index (user
, '/');
1901 int len
= ptr
? ptr
- user
: strlen (user
);
1903 unsigned char *ptr1
= index (user
, ':');
1904 if (ptr1
!= 0 && ptr1
- user
< len
)
1907 /* Copy the user name into temp storage. */
1908 o
= (unsigned char *) alloca (len
+ 1);
1909 bcopy ((char *) user
, o
, len
);
1912 /* Look up the user name. */
1913 pw
= (struct passwd
*) getpwnam (o
+ 1);
1915 error ("\"%s\" isn't a registered user", o
+ 1);
1917 newdir
= (unsigned char *) pw
->pw_dir
;
1919 /* Discard the user name from NM. */
1926 #endif /* not VMS */
1930 defalt
= current_buffer
->directory
;
1931 CHECK_STRING (defalt
);
1932 newdir
= SDATA (defalt
);
1935 /* Now concatenate the directory and name to new space in the stack frame */
1937 tlen
= (newdir
? strlen (newdir
) + 1 : 0) + strlen (nm
) + 1;
1938 target
= (unsigned char *) alloca (tlen
);
1944 if (nm
[0] == 0 || nm
[0] == '/')
1945 strcpy (target
, newdir
);
1948 file_name_as_directory (target
, newdir
);
1951 strcat (target
, nm
);
1953 if (index (target
, '/'))
1954 strcpy (target
, sys_translate_unix (target
));
1957 /* Now canonicalize by removing /. and /foo/.. if they appear */
1965 if (*p
!= ']' && *p
!= '>' && *p
!= '-')
1971 else if ((p
[0] == ']' || p
[0] == '>') && p
[0] == p
[1] + 2)
1972 /* brackets are offset from each other by 2 */
1975 if (*p
!= '.' && *p
!= '-' && o
[-1] != '.')
1976 /* convert [foo][bar] to [bar] */
1977 while (o
[-1] != '[' && o
[-1] != '<')
1979 else if (*p
== '-' && *o
!= '.')
1982 else if (p
[0] == '-' && o
[-1] == '.' &&
1983 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>'))
1984 /* flush .foo.- ; leave - if stopped by '[' or '<' */
1988 while (o
[-1] != '.' && o
[-1] != '[' && o
[-1] != '<');
1989 if (p
[1] == '.') /* foo.-.bar ==> bar. */
1991 else if (o
[-1] == '.') /* '.foo.-]' ==> ']' */
1993 /* else [foo.-] ==> [-] */
1999 o
[-1] != '[' && o
[-1] != '<' && o
[-1] != '.' &&
2000 p
[1] != ']' && p
[1] != '>' && p
[1] != '.')
2010 else if (!strncmp (p
, "//", 2)
2012 /* // at start of filename is meaningful in Apollo system. */
2020 else if (p
[0] == '/' && p
[1] == '.' &&
2021 (p
[2] == '/' || p
[2] == 0))
2023 else if (!strncmp (p
, "/..", 3)
2024 /* `/../' is the "superroot" on certain file systems. */
2026 && (p
[3] == '/' || p
[3] == 0))
2028 while (o
!= target
&& *--o
!= '/')
2031 if (o
== target
+ 1 && o
[-1] == '/' && o
[0] == '/')
2035 if (o
== target
&& *o
== '/')
2043 #endif /* not VMS */
2046 return make_string (target
, o
- target
);
2050 DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name
,
2051 Ssubstitute_in_file_name
, 1, 1, 0,
2052 doc
: /* Substitute environment variables referred to in FILENAME.
2053 `$FOO' where FOO is an environment variable name means to substitute
2054 the value of that variable. The variable name should be terminated
2055 with a character not a letter, digit or underscore; otherwise, enclose
2056 the entire variable name in braces.
2057 If `/~' appears, all of FILENAME through that `/' is discarded.
2059 On VMS, `$' substitution is not done; this function does little and only
2060 duplicates what `expand-file-name' does. */)
2062 Lisp_Object filename
;
2066 register unsigned char *s
, *p
, *o
, *x
, *endp
;
2067 unsigned char *target
= NULL
;
2069 int substituted
= 0;
2072 Lisp_Object handler
;
2074 CHECK_STRING (filename
);
2076 /* If the file name has special constructs in it,
2077 call the corresponding file handler. */
2078 handler
= Ffind_file_name_handler (filename
, Qsubstitute_in_file_name
);
2079 if (!NILP (handler
))
2080 return call2 (handler
, Qsubstitute_in_file_name
, filename
);
2082 nm
= SDATA (filename
);
2084 nm
= strcpy (alloca (strlen (nm
) + 1), nm
);
2085 CORRECT_DIR_SEPS (nm
);
2086 substituted
= (strcmp (nm
, SDATA (filename
)) != 0);
2088 endp
= nm
+ SBYTES (filename
);
2090 /* If /~ or // appears, discard everything through first slash. */
2092 for (p
= nm
; p
!= endp
; p
++)
2095 #if defined (APOLLO) || defined (WINDOWSNT) || defined(CYGWIN)
2096 /* // at start of file name is meaningful in Apollo,
2097 WindowsNT and Cygwin systems. */
2098 || (IS_DIRECTORY_SEP (p
[0]) && p
- 1 != nm
)
2099 #else /* not (APOLLO || WINDOWSNT || CYGWIN) */
2100 || IS_DIRECTORY_SEP (p
[0])
2101 #endif /* not (APOLLO || WINDOWSNT || CYGWIN) */
2106 || p
[-1] == ':' || p
[-1] == ']' || p
[-1] == '>'
2108 || IS_DIRECTORY_SEP (p
[-1])))
2110 for (s
= p
; *s
&& (!IS_DIRECTORY_SEP (*s
)
2115 if (p
[0] == '~' && s
> p
+ 1) /* we've got "/~something/" */
2117 o
= (unsigned char *) alloca (s
- p
+ 1);
2118 bcopy ((char *) p
, o
, s
- p
);
2121 pw
= (struct passwd
*) getpwnam (o
+ 1);
2123 /* If we have ~/ or ~user and `user' exists, discard
2124 everything up to ~. But if `user' does not exist, leave
2125 ~user alone, it might be a literal file name. */
2126 if (IS_DIRECTORY_SEP (p
[0]) || s
== p
+ 1 || pw
)
2133 /* see comment in expand-file-name about drive specifiers */
2134 else if (IS_DRIVE (p
[0]) && p
[1] == ':'
2135 && p
> nm
&& IS_DIRECTORY_SEP (p
[-1]))
2144 return make_specified_string (nm
, -1, strlen (nm
),
2145 STRING_MULTIBYTE (filename
));
2148 /* See if any variables are substituted into the string
2149 and find the total length of their values in `total' */
2151 for (p
= nm
; p
!= endp
;)
2161 /* "$$" means a single "$" */
2170 while (p
!= endp
&& *p
!= '}') p
++;
2171 if (*p
!= '}') goto missingclose
;
2177 while (p
!= endp
&& (isalnum (*p
) || *p
== '_')) p
++;
2181 /* Copy out the variable name */
2182 target
= (unsigned char *) alloca (s
- o
+ 1);
2183 strncpy (target
, o
, s
- o
);
2186 strupr (target
); /* $home == $HOME etc. */
2189 /* Get variable value */
2190 o
= (unsigned char *) egetenv (target
);
2193 total
+= strlen (o
);
2203 /* If substitution required, recopy the string and do it */
2204 /* Make space in stack frame for the new copy */
2205 xnm
= (unsigned char *) alloca (SBYTES (filename
) + total
+ 1);
2208 /* Copy the rest of the name through, replacing $ constructs with values */
2225 while (p
!= endp
&& *p
!= '}') p
++;
2226 if (*p
!= '}') goto missingclose
;
2232 while (p
!= endp
&& (isalnum (*p
) || *p
== '_')) p
++;
2236 /* Copy out the variable name */
2237 target
= (unsigned char *) alloca (s
- o
+ 1);
2238 strncpy (target
, o
, s
- o
);
2241 strupr (target
); /* $home == $HOME etc. */
2244 /* Get variable value */
2245 o
= (unsigned char *) egetenv (target
);
2249 strcpy (x
, target
); x
+= strlen (target
);
2251 else if (STRING_MULTIBYTE (filename
))
2253 /* If the original string is multibyte,
2254 convert what we substitute into multibyte. */
2257 int c
= unibyte_char_to_multibyte (*o
++);
2258 x
+= CHAR_STRING (c
, x
);
2270 /* If /~ or // appears, discard everything through first slash. */
2272 for (p
= xnm
; p
!= x
; p
++)
2274 #if defined (APOLLO) || defined (WINDOWSNT) || defined(CYGWIN)
2275 || (IS_DIRECTORY_SEP (p
[0]) && p
- 1 != xnm
)
2276 #else /* not (APOLLO || WINDOWSNT || CYGWIN) */
2277 || IS_DIRECTORY_SEP (p
[0])
2278 #endif /* not (APOLLO || WINDOWSNT || CYGWIN) */
2280 && p
!= xnm
&& IS_DIRECTORY_SEP (p
[-1]))
2283 else if (IS_DRIVE (p
[0]) && p
[1] == ':'
2284 && p
> xnm
&& IS_DIRECTORY_SEP (p
[-1]))
2288 return make_specified_string (xnm
, -1, x
- xnm
, STRING_MULTIBYTE (filename
));
2291 error ("Bad format environment-variable substitution");
2293 error ("Missing \"}\" in environment-variable substitution");
2295 error ("Substituting nonexistent environment variable \"%s\"", target
);
2298 #endif /* not VMS */
2302 /* A slightly faster and more convenient way to get
2303 (directory-file-name (expand-file-name FOO)). */
2306 expand_and_dir_to_file (filename
, defdir
)
2307 Lisp_Object filename
, defdir
;
2309 register Lisp_Object absname
;
2311 absname
= Fexpand_file_name (filename
, defdir
);
2314 register int c
= SREF (absname
, SBYTES (absname
) - 1);
2315 if (c
== ':' || c
== ']' || c
== '>')
2316 absname
= Fdirectory_file_name (absname
);
2319 /* Remove final slash, if any (unless this is the root dir).
2320 stat behaves differently depending! */
2321 if (SCHARS (absname
) > 1
2322 && IS_DIRECTORY_SEP (SREF (absname
, SBYTES (absname
) - 1))
2323 && !IS_DEVICE_SEP (SREF (absname
, SBYTES (absname
)-2)))
2324 /* We cannot take shortcuts; they might be wrong for magic file names. */
2325 absname
= Fdirectory_file_name (absname
);
2330 /* Signal an error if the file ABSNAME already exists.
2331 If INTERACTIVE is nonzero, ask the user whether to proceed,
2332 and bypass the error if the user says to go ahead.
2333 QUERYSTRING is a name for the action that is being considered
2336 *STATPTR is used to store the stat information if the file exists.
2337 If the file does not exist, STATPTR->st_mode is set to 0.
2338 If STATPTR is null, we don't store into it.
2340 If QUICK is nonzero, we ask for y or n, not yes or no. */
2343 barf_or_query_if_file_exists (absname
, querystring
, interactive
, statptr
, quick
)
2344 Lisp_Object absname
;
2345 unsigned char *querystring
;
2347 struct stat
*statptr
;
2350 register Lisp_Object tem
, encoded_filename
;
2351 struct stat statbuf
;
2352 struct gcpro gcpro1
;
2354 encoded_filename
= ENCODE_FILE (absname
);
2356 /* stat is a good way to tell whether the file exists,
2357 regardless of what access permissions it has. */
2358 if (lstat (SDATA (encoded_filename
), &statbuf
) >= 0)
2361 Fsignal (Qfile_already_exists
,
2362 Fcons (build_string ("File already exists"),
2363 Fcons (absname
, Qnil
)));
2365 tem
= format2 ("File %s already exists; %s anyway? ",
2366 absname
, build_string (querystring
));
2368 tem
= Fy_or_n_p (tem
);
2370 tem
= do_yes_or_no_p (tem
);
2373 Fsignal (Qfile_already_exists
,
2374 Fcons (build_string ("File already exists"),
2375 Fcons (absname
, Qnil
)));
2382 statptr
->st_mode
= 0;
2387 DEFUN ("copy-file", Fcopy_file
, Scopy_file
, 2, 4,
2388 "fCopy file: \nFCopy %s to file: \np\nP",
2389 doc
: /* Copy FILE to NEWNAME. Both args must be strings.
2390 If NEWNAME names a directory, copy FILE there.
2391 Signals a `file-already-exists' error if file NEWNAME already exists,
2392 unless a third argument OK-IF-ALREADY-EXISTS is supplied and non-nil.
2393 A number as third arg means request confirmation if NEWNAME already exists.
2394 This is what happens in interactive use with M-x.
2395 Always sets the file modes of the output file to match the input file.
2396 Fourth arg KEEP-TIME non-nil means give the output file the same
2397 last-modified time as the old one. (This works on only some systems.)
2398 A prefix arg makes KEEP-TIME non-nil. */)
2399 (file
, newname
, ok_if_already_exists
, keep_time
)
2400 Lisp_Object file
, newname
, ok_if_already_exists
, keep_time
;
2403 char buf
[16 * 1024];
2404 struct stat st
, out_st
;
2405 Lisp_Object handler
;
2406 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2407 int count
= SPECPDL_INDEX ();
2408 int input_file_statable_p
;
2409 Lisp_Object encoded_file
, encoded_newname
;
2411 encoded_file
= encoded_newname
= Qnil
;
2412 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
2413 CHECK_STRING (file
);
2414 CHECK_STRING (newname
);
2416 if (!NILP (Ffile_directory_p (newname
)))
2417 newname
= Fexpand_file_name (Ffile_name_nondirectory (file
), newname
);
2419 newname
= Fexpand_file_name (newname
, Qnil
);
2421 file
= Fexpand_file_name (file
, Qnil
);
2423 /* If the input file name has special constructs in it,
2424 call the corresponding file handler. */
2425 handler
= Ffind_file_name_handler (file
, Qcopy_file
);
2426 /* Likewise for output file name. */
2428 handler
= Ffind_file_name_handler (newname
, Qcopy_file
);
2429 if (!NILP (handler
))
2430 RETURN_UNGCPRO (call5 (handler
, Qcopy_file
, file
, newname
,
2431 ok_if_already_exists
, keep_time
));
2433 encoded_file
= ENCODE_FILE (file
);
2434 encoded_newname
= ENCODE_FILE (newname
);
2436 if (NILP (ok_if_already_exists
)
2437 || INTEGERP (ok_if_already_exists
))
2438 barf_or_query_if_file_exists (encoded_newname
, "copy to it",
2439 INTEGERP (ok_if_already_exists
), &out_st
, 0);
2440 else if (stat (SDATA (encoded_newname
), &out_st
) < 0)
2444 if (!CopyFile (SDATA (encoded_file
),
2445 SDATA (encoded_newname
),
2447 report_file_error ("Copying file", Fcons (file
, Fcons (newname
, Qnil
)));
2448 /* CopyFile retains the timestamp by default. */
2449 else if (NILP (keep_time
))
2455 EMACS_GET_TIME (now
);
2456 filename
= SDATA (encoded_newname
);
2458 /* Ensure file is writable while its modified time is set. */
2459 attributes
= GetFileAttributes (filename
);
2460 SetFileAttributes (filename
, attributes
& ~FILE_ATTRIBUTE_READONLY
);
2461 if (set_file_times (filename
, now
, now
))
2463 /* Restore original attributes. */
2464 SetFileAttributes (filename
, attributes
);
2465 Fsignal (Qfile_date_error
,
2466 Fcons (build_string ("Cannot set file date"),
2467 Fcons (newname
, Qnil
)));
2469 /* Restore original attributes. */
2470 SetFileAttributes (filename
, attributes
);
2472 #else /* not WINDOWSNT */
2474 ifd
= emacs_open (SDATA (encoded_file
), O_RDONLY
, 0);
2478 report_file_error ("Opening input file", Fcons (file
, Qnil
));
2480 record_unwind_protect (close_file_unwind
, make_number (ifd
));
2482 /* We can only copy regular files and symbolic links. Other files are not
2484 input_file_statable_p
= (fstat (ifd
, &st
) >= 0);
2486 #if !defined (DOS_NT) || __DJGPP__ > 1
2487 if (out_st
.st_mode
!= 0
2488 && st
.st_dev
== out_st
.st_dev
&& st
.st_ino
== out_st
.st_ino
)
2491 report_file_error ("Input and output files are the same",
2492 Fcons (file
, Fcons (newname
, Qnil
)));
2496 #if defined (S_ISREG) && defined (S_ISLNK)
2497 if (input_file_statable_p
)
2499 if (!(S_ISREG (st
.st_mode
)) && !(S_ISLNK (st
.st_mode
)))
2501 #if defined (EISDIR)
2502 /* Get a better looking error message. */
2505 report_file_error ("Non-regular file", Fcons (file
, Qnil
));
2508 #endif /* S_ISREG && S_ISLNK */
2511 /* Create the copy file with the same record format as the input file */
2512 ofd
= sys_creat (SDATA (encoded_newname
), 0666, ifd
);
2515 /* System's default file type was set to binary by _fmode in emacs.c. */
2516 ofd
= creat (SDATA (encoded_newname
), S_IREAD
| S_IWRITE
);
2517 #else /* not MSDOS */
2518 ofd
= creat (SDATA (encoded_newname
), 0666);
2519 #endif /* not MSDOS */
2522 report_file_error ("Opening output file", Fcons (newname
, Qnil
));
2524 record_unwind_protect (close_file_unwind
, make_number (ofd
));
2528 while ((n
= emacs_read (ifd
, buf
, sizeof buf
)) > 0)
2529 if (emacs_write (ofd
, buf
, n
) != n
)
2530 report_file_error ("I/O error", Fcons (newname
, Qnil
));
2533 /* Closing the output clobbers the file times on some systems. */
2534 if (emacs_close (ofd
) < 0)
2535 report_file_error ("I/O error", Fcons (newname
, Qnil
));
2537 if (input_file_statable_p
)
2539 if (!NILP (keep_time
))
2541 EMACS_TIME atime
, mtime
;
2542 EMACS_SET_SECS_USECS (atime
, st
.st_atime
, 0);
2543 EMACS_SET_SECS_USECS (mtime
, st
.st_mtime
, 0);
2544 if (set_file_times (SDATA (encoded_newname
),
2546 Fsignal (Qfile_date_error
,
2547 Fcons (build_string ("Cannot set file date"),
2548 Fcons (newname
, Qnil
)));
2551 chmod (SDATA (encoded_newname
), st
.st_mode
& 07777);
2553 #if defined (__DJGPP__) && __DJGPP__ > 1
2554 /* In DJGPP v2.0 and later, fstat usually returns true file mode bits,
2555 and if it can't, it tells so. Otherwise, under MSDOS we usually
2556 get only the READ bit, which will make the copied file read-only,
2557 so it's better not to chmod at all. */
2558 if ((_djstat_flags
& _STFAIL_WRITEBIT
) == 0)
2559 chmod (SDATA (encoded_newname
), st
.st_mode
& 07777);
2560 #endif /* DJGPP version 2 or newer */
2565 #endif /* WINDOWSNT */
2567 /* Discard the unwind protects. */
2568 specpdl_ptr
= specpdl
+ count
;
2574 DEFUN ("make-directory-internal", Fmake_directory_internal
,
2575 Smake_directory_internal
, 1, 1, 0,
2576 doc
: /* Create a new directory named DIRECTORY. */)
2578 Lisp_Object directory
;
2580 const unsigned char *dir
;
2581 Lisp_Object handler
;
2582 Lisp_Object encoded_dir
;
2584 CHECK_STRING (directory
);
2585 directory
= Fexpand_file_name (directory
, Qnil
);
2587 handler
= Ffind_file_name_handler (directory
, Qmake_directory_internal
);
2588 if (!NILP (handler
))
2589 return call2 (handler
, Qmake_directory_internal
, directory
);
2591 encoded_dir
= ENCODE_FILE (directory
);
2593 dir
= SDATA (encoded_dir
);
2596 if (mkdir (dir
) != 0)
2598 if (mkdir (dir
, 0777) != 0)
2600 report_file_error ("Creating directory", Flist (1, &directory
));
2605 DEFUN ("delete-directory", Fdelete_directory
, Sdelete_directory
, 1, 1, "FDelete directory: ",
2606 doc
: /* Delete the directory named DIRECTORY. Does not follow symlinks. */)
2608 Lisp_Object directory
;
2610 const unsigned char *dir
;
2611 Lisp_Object handler
;
2612 Lisp_Object encoded_dir
;
2614 CHECK_STRING (directory
);
2615 directory
= Fdirectory_file_name (Fexpand_file_name (directory
, Qnil
));
2617 handler
= Ffind_file_name_handler (directory
, Qdelete_directory
);
2618 if (!NILP (handler
))
2619 return call2 (handler
, Qdelete_directory
, directory
);
2621 encoded_dir
= ENCODE_FILE (directory
);
2623 dir
= SDATA (encoded_dir
);
2625 if (rmdir (dir
) != 0)
2626 report_file_error ("Removing directory", Flist (1, &directory
));
2631 DEFUN ("delete-file", Fdelete_file
, Sdelete_file
, 1, 1, "fDelete file: ",
2632 doc
: /* Delete file named FILENAME. If it is a symlink, remove the symlink.
2633 If file has multiple names, it continues to exist with the other names. */)
2635 Lisp_Object filename
;
2637 Lisp_Object handler
;
2638 Lisp_Object encoded_file
;
2639 struct gcpro gcpro1
;
2642 if (!NILP (Ffile_directory_p (filename
))
2643 && NILP (Ffile_symlink_p (filename
)))
2644 Fsignal (Qfile_error
,
2645 Fcons (build_string ("Removing old name: is a directory"),
2646 Fcons (filename
, Qnil
)));
2648 filename
= Fexpand_file_name (filename
, Qnil
);
2650 handler
= Ffind_file_name_handler (filename
, Qdelete_file
);
2651 if (!NILP (handler
))
2652 return call2 (handler
, Qdelete_file
, filename
);
2654 encoded_file
= ENCODE_FILE (filename
);
2656 if (0 > unlink (SDATA (encoded_file
)))
2657 report_file_error ("Removing old name", Flist (1, &filename
));
2662 internal_delete_file_1 (ignore
)
2668 /* Delete file FILENAME, returning 1 if successful and 0 if failed. */
2671 internal_delete_file (filename
)
2672 Lisp_Object filename
;
2674 return NILP (internal_condition_case_1 (Fdelete_file
, filename
,
2675 Qt
, internal_delete_file_1
));
2678 DEFUN ("rename-file", Frename_file
, Srename_file
, 2, 3,
2679 "fRename file: \nFRename %s to file: \np",
2680 doc
: /* Rename FILE as NEWNAME. Both args strings.
2681 If file has names other than FILE, it continues to have those names.
2682 Signals a `file-already-exists' error if a file NEWNAME already exists
2683 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2684 A number as third arg means request confirmation if NEWNAME already exists.
2685 This is what happens in interactive use with M-x. */)
2686 (file
, newname
, ok_if_already_exists
)
2687 Lisp_Object file
, newname
, ok_if_already_exists
;
2690 Lisp_Object args
[2];
2692 Lisp_Object handler
;
2693 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
2694 Lisp_Object encoded_file
, encoded_newname
, symlink_target
;
2696 symlink_target
= encoded_file
= encoded_newname
= Qnil
;
2697 GCPRO5 (file
, newname
, encoded_file
, encoded_newname
, symlink_target
);
2698 CHECK_STRING (file
);
2699 CHECK_STRING (newname
);
2700 file
= Fexpand_file_name (file
, Qnil
);
2701 newname
= Fexpand_file_name (newname
, Qnil
);
2703 /* If the file name has special constructs in it,
2704 call the corresponding file handler. */
2705 handler
= Ffind_file_name_handler (file
, Qrename_file
);
2707 handler
= Ffind_file_name_handler (newname
, Qrename_file
);
2708 if (!NILP (handler
))
2709 RETURN_UNGCPRO (call4 (handler
, Qrename_file
,
2710 file
, newname
, ok_if_already_exists
));
2712 encoded_file
= ENCODE_FILE (file
);
2713 encoded_newname
= ENCODE_FILE (newname
);
2716 /* If the file names are identical but for the case, don't ask for
2717 confirmation: they simply want to change the letter-case of the
2719 if (NILP (Fstring_equal (Fdowncase (file
), Fdowncase (newname
))))
2721 if (NILP (ok_if_already_exists
)
2722 || INTEGERP (ok_if_already_exists
))
2723 barf_or_query_if_file_exists (encoded_newname
, "rename to it",
2724 INTEGERP (ok_if_already_exists
), 0, 0);
2726 if (0 > rename (SDATA (encoded_file
), SDATA (encoded_newname
)))
2728 if (0 > link (SDATA (encoded_file
), SDATA (encoded_newname
))
2729 || 0 > unlink (SDATA (encoded_file
)))
2735 symlink_target
= Ffile_symlink_p (file
);
2736 if (! NILP (symlink_target
))
2737 Fmake_symbolic_link (symlink_target
, newname
,
2738 NILP (ok_if_already_exists
) ? Qnil
: Qt
);
2741 Fcopy_file (file
, newname
,
2742 /* We have already prompted if it was an integer,
2743 so don't have copy-file prompt again. */
2744 NILP (ok_if_already_exists
) ? Qnil
: Qt
, Qt
);
2745 Fdelete_file (file
);
2752 report_file_error ("Renaming", Flist (2, args
));
2755 report_file_error ("Renaming", Flist (2, &file
));
2762 DEFUN ("add-name-to-file", Fadd_name_to_file
, Sadd_name_to_file
, 2, 3,
2763 "fAdd name to file: \nFName to add to %s: \np",
2764 doc
: /* Give FILE additional name NEWNAME. Both args strings.
2765 Signals a `file-already-exists' error if a file NEWNAME already exists
2766 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2767 A number as third arg means request confirmation if NEWNAME already exists.
2768 This is what happens in interactive use with M-x. */)
2769 (file
, newname
, ok_if_already_exists
)
2770 Lisp_Object file
, newname
, ok_if_already_exists
;
2773 Lisp_Object args
[2];
2775 Lisp_Object handler
;
2776 Lisp_Object encoded_file
, encoded_newname
;
2777 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2779 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
2780 encoded_file
= encoded_newname
= Qnil
;
2781 CHECK_STRING (file
);
2782 CHECK_STRING (newname
);
2783 file
= Fexpand_file_name (file
, Qnil
);
2784 newname
= Fexpand_file_name (newname
, Qnil
);
2786 /* If the file name has special constructs in it,
2787 call the corresponding file handler. */
2788 handler
= Ffind_file_name_handler (file
, Qadd_name_to_file
);
2789 if (!NILP (handler
))
2790 RETURN_UNGCPRO (call4 (handler
, Qadd_name_to_file
, file
,
2791 newname
, ok_if_already_exists
));
2793 /* If the new name has special constructs in it,
2794 call the corresponding file handler. */
2795 handler
= Ffind_file_name_handler (newname
, Qadd_name_to_file
);
2796 if (!NILP (handler
))
2797 RETURN_UNGCPRO (call4 (handler
, Qadd_name_to_file
, file
,
2798 newname
, ok_if_already_exists
));
2800 encoded_file
= ENCODE_FILE (file
);
2801 encoded_newname
= ENCODE_FILE (newname
);
2803 if (NILP (ok_if_already_exists
)
2804 || INTEGERP (ok_if_already_exists
))
2805 barf_or_query_if_file_exists (encoded_newname
, "make it a new name",
2806 INTEGERP (ok_if_already_exists
), 0, 0);
2808 unlink (SDATA (newname
));
2809 if (0 > link (SDATA (encoded_file
), SDATA (encoded_newname
)))
2814 report_file_error ("Adding new name", Flist (2, args
));
2816 report_file_error ("Adding new name", Flist (2, &file
));
2825 DEFUN ("make-symbolic-link", Fmake_symbolic_link
, Smake_symbolic_link
, 2, 3,
2826 "FMake symbolic link to file: \nFMake symbolic link to file %s: \np",
2827 doc
: /* Make a symbolic link to FILENAME, named LINKNAME. Both args strings.
2828 Signals a `file-already-exists' error if a file LINKNAME already exists
2829 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2830 A number as third arg means request confirmation if LINKNAME already exists.
2831 This happens for interactive use with M-x. */)
2832 (filename
, linkname
, ok_if_already_exists
)
2833 Lisp_Object filename
, linkname
, ok_if_already_exists
;
2836 Lisp_Object args
[2];
2838 Lisp_Object handler
;
2839 Lisp_Object encoded_filename
, encoded_linkname
;
2840 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2842 GCPRO4 (filename
, linkname
, encoded_filename
, encoded_linkname
);
2843 encoded_filename
= encoded_linkname
= Qnil
;
2844 CHECK_STRING (filename
);
2845 CHECK_STRING (linkname
);
2846 /* If the link target has a ~, we must expand it to get
2847 a truly valid file name. Otherwise, do not expand;
2848 we want to permit links to relative file names. */
2849 if (SREF (filename
, 0) == '~')
2850 filename
= Fexpand_file_name (filename
, Qnil
);
2851 linkname
= Fexpand_file_name (linkname
, Qnil
);
2853 /* If the file name has special constructs in it,
2854 call the corresponding file handler. */
2855 handler
= Ffind_file_name_handler (filename
, Qmake_symbolic_link
);
2856 if (!NILP (handler
))
2857 RETURN_UNGCPRO (call4 (handler
, Qmake_symbolic_link
, filename
,
2858 linkname
, ok_if_already_exists
));
2860 /* If the new link name has special constructs in it,
2861 call the corresponding file handler. */
2862 handler
= Ffind_file_name_handler (linkname
, Qmake_symbolic_link
);
2863 if (!NILP (handler
))
2864 RETURN_UNGCPRO (call4 (handler
, Qmake_symbolic_link
, filename
,
2865 linkname
, ok_if_already_exists
));
2867 encoded_filename
= ENCODE_FILE (filename
);
2868 encoded_linkname
= ENCODE_FILE (linkname
);
2870 if (NILP (ok_if_already_exists
)
2871 || INTEGERP (ok_if_already_exists
))
2872 barf_or_query_if_file_exists (encoded_linkname
, "make it a link",
2873 INTEGERP (ok_if_already_exists
), 0, 0);
2874 if (0 > symlink (SDATA (encoded_filename
),
2875 SDATA (encoded_linkname
)))
2877 /* If we didn't complain already, silently delete existing file. */
2878 if (errno
== EEXIST
)
2880 unlink (SDATA (encoded_linkname
));
2881 if (0 <= symlink (SDATA (encoded_filename
),
2882 SDATA (encoded_linkname
)))
2892 report_file_error ("Making symbolic link", Flist (2, args
));
2894 report_file_error ("Making symbolic link", Flist (2, &filename
));
2900 #endif /* S_IFLNK */
2904 DEFUN ("define-logical-name", Fdefine_logical_name
, Sdefine_logical_name
,
2905 2, 2, "sDefine logical name: \nsDefine logical name %s as: ",
2906 doc
: /* Define the job-wide logical name NAME to have the value STRING.
2907 If STRING is nil or a null string, the logical name NAME is deleted. */)
2912 CHECK_STRING (name
);
2914 delete_logical_name (SDATA (name
));
2917 CHECK_STRING (string
);
2919 if (SCHARS (string
) == 0)
2920 delete_logical_name (SDATA (name
));
2922 define_logical_name (SDATA (name
), SDATA (string
));
2931 DEFUN ("sysnetunam", Fsysnetunam
, Ssysnetunam
, 2, 2, 0,
2932 doc
: /* Open a network connection to PATH using LOGIN as the login string. */)
2934 Lisp_Object path
, login
;
2938 CHECK_STRING (path
);
2939 CHECK_STRING (login
);
2941 netresult
= netunam (SDATA (path
), SDATA (login
));
2943 if (netresult
== -1)
2948 #endif /* HPUX_NET */
2950 DEFUN ("file-name-absolute-p", Ffile_name_absolute_p
, Sfile_name_absolute_p
,
2952 doc
: /* Return t if file FILENAME specifies an absolute file name.
2953 On Unix, this is a name starting with a `/' or a `~'. */)
2955 Lisp_Object filename
;
2957 const unsigned char *ptr
;
2959 CHECK_STRING (filename
);
2960 ptr
= SDATA (filename
);
2961 if (IS_DIRECTORY_SEP (*ptr
) || *ptr
== '~'
2963 /* ??? This criterion is probably wrong for '<'. */
2964 || index (ptr
, ':') || index (ptr
, '<')
2965 || (*ptr
== '[' && (ptr
[1] != '-' || (ptr
[2] != '.' && ptr
[2] != ']'))
2969 || (IS_DRIVE (*ptr
) && ptr
[1] == ':' && IS_DIRECTORY_SEP (ptr
[2]))
2977 /* Return nonzero if file FILENAME exists and can be executed. */
2980 check_executable (filename
)
2984 int len
= strlen (filename
);
2987 if (stat (filename
, &st
) < 0)
2989 #if defined (WINDOWSNT) || (defined (MSDOS) && __DJGPP__ > 1)
2990 return ((st
.st_mode
& S_IEXEC
) != 0);
2992 return (S_ISREG (st
.st_mode
)
2994 && (stricmp ((suffix
= filename
+ len
-4), ".com") == 0
2995 || stricmp (suffix
, ".exe") == 0
2996 || stricmp (suffix
, ".bat") == 0)
2997 || (st
.st_mode
& S_IFMT
) == S_IFDIR
);
2998 #endif /* not WINDOWSNT */
2999 #else /* not DOS_NT */
3000 #ifdef HAVE_EUIDACCESS
3001 return (euidaccess (filename
, 1) >= 0);
3003 /* Access isn't quite right because it uses the real uid
3004 and we really want to test with the effective uid.
3005 But Unix doesn't give us a right way to do it. */
3006 return (access (filename
, 1) >= 0);
3008 #endif /* not DOS_NT */
3011 /* Return nonzero if file FILENAME exists and can be written. */
3014 check_writable (filename
)
3019 if (stat (filename
, &st
) < 0)
3021 return (st
.st_mode
& S_IWRITE
|| (st
.st_mode
& S_IFMT
) == S_IFDIR
);
3022 #else /* not MSDOS */
3023 #ifdef HAVE_EUIDACCESS
3024 return (euidaccess (filename
, 2) >= 0);
3026 /* Access isn't quite right because it uses the real uid
3027 and we really want to test with the effective uid.
3028 But Unix doesn't give us a right way to do it.
3029 Opening with O_WRONLY could work for an ordinary file,
3030 but would lose for directories. */
3031 return (access (filename
, 2) >= 0);
3033 #endif /* not MSDOS */
3036 DEFUN ("file-exists-p", Ffile_exists_p
, Sfile_exists_p
, 1, 1, 0,
3037 doc
: /* Return t if file FILENAME exists. (This does not mean you can read it.)
3038 See also `file-readable-p' and `file-attributes'. */)
3040 Lisp_Object filename
;
3042 Lisp_Object absname
;
3043 Lisp_Object handler
;
3044 struct stat statbuf
;
3046 CHECK_STRING (filename
);
3047 absname
= Fexpand_file_name (filename
, Qnil
);
3049 /* If the file name has special constructs in it,
3050 call the corresponding file handler. */
3051 handler
= Ffind_file_name_handler (absname
, Qfile_exists_p
);
3052 if (!NILP (handler
))
3053 return call2 (handler
, Qfile_exists_p
, absname
);
3055 absname
= ENCODE_FILE (absname
);
3057 return (stat (SDATA (absname
), &statbuf
) >= 0) ? Qt
: Qnil
;
3060 DEFUN ("file-executable-p", Ffile_executable_p
, Sfile_executable_p
, 1, 1, 0,
3061 doc
: /* Return t if FILENAME can be executed by you.
3062 For a directory, this means you can access files in that directory. */)
3064 Lisp_Object filename
;
3066 Lisp_Object absname
;
3067 Lisp_Object handler
;
3069 CHECK_STRING (filename
);
3070 absname
= Fexpand_file_name (filename
, Qnil
);
3072 /* If the file name has special constructs in it,
3073 call the corresponding file handler. */
3074 handler
= Ffind_file_name_handler (absname
, Qfile_executable_p
);
3075 if (!NILP (handler
))
3076 return call2 (handler
, Qfile_executable_p
, absname
);
3078 absname
= ENCODE_FILE (absname
);
3080 return (check_executable (SDATA (absname
)) ? Qt
: Qnil
);
3083 DEFUN ("file-readable-p", Ffile_readable_p
, Sfile_readable_p
, 1, 1, 0,
3084 doc
: /* Return t if file FILENAME exists and you can read it.
3085 See also `file-exists-p' and `file-attributes'. */)
3087 Lisp_Object filename
;
3089 Lisp_Object absname
;
3090 Lisp_Object handler
;
3093 struct stat statbuf
;
3095 CHECK_STRING (filename
);
3096 absname
= Fexpand_file_name (filename
, Qnil
);
3098 /* If the file name has special constructs in it,
3099 call the corresponding file handler. */
3100 handler
= Ffind_file_name_handler (absname
, Qfile_readable_p
);
3101 if (!NILP (handler
))
3102 return call2 (handler
, Qfile_readable_p
, absname
);
3104 absname
= ENCODE_FILE (absname
);
3106 #if defined(DOS_NT) || defined(macintosh)
3107 /* Under MS-DOS, Windows, and Macintosh, open does not work for
3109 if (access (SDATA (absname
), 0) == 0)
3112 #else /* not DOS_NT and not macintosh */
3114 #if defined (S_ISFIFO) && defined (O_NONBLOCK)
3115 /* Opening a fifo without O_NONBLOCK can wait.
3116 We don't want to wait. But we don't want to mess wth O_NONBLOCK
3117 except in the case of a fifo, on a system which handles it. */
3118 desc
= stat (SDATA (absname
), &statbuf
);
3121 if (S_ISFIFO (statbuf
.st_mode
))
3122 flags
|= O_NONBLOCK
;
3124 desc
= emacs_open (SDATA (absname
), flags
, 0);
3129 #endif /* not DOS_NT and not macintosh */
3132 /* Having this before file-symlink-p mysteriously caused it to be forgotten
3134 DEFUN ("file-writable-p", Ffile_writable_p
, Sfile_writable_p
, 1, 1, 0,
3135 doc
: /* Return t if file FILENAME can be written or created by you. */)
3137 Lisp_Object filename
;
3139 Lisp_Object absname
, dir
, encoded
;
3140 Lisp_Object handler
;
3141 struct stat statbuf
;
3143 CHECK_STRING (filename
);
3144 absname
= Fexpand_file_name (filename
, Qnil
);
3146 /* If the file name has special constructs in it,
3147 call the corresponding file handler. */
3148 handler
= Ffind_file_name_handler (absname
, Qfile_writable_p
);
3149 if (!NILP (handler
))
3150 return call2 (handler
, Qfile_writable_p
, absname
);
3152 encoded
= ENCODE_FILE (absname
);
3153 if (stat (SDATA (encoded
), &statbuf
) >= 0)
3154 return (check_writable (SDATA (encoded
))
3157 dir
= Ffile_name_directory (absname
);
3160 dir
= Fdirectory_file_name (dir
);
3164 dir
= Fdirectory_file_name (dir
);
3167 dir
= ENCODE_FILE (dir
);
3169 /* The read-only attribute of the parent directory doesn't affect
3170 whether a file or directory can be created within it. Some day we
3171 should check ACLs though, which do affect this. */
3172 if (stat (SDATA (dir
), &statbuf
) < 0)
3174 return (statbuf
.st_mode
& S_IFMT
) == S_IFDIR
? Qt
: Qnil
;
3176 return (check_writable (!NILP (dir
) ? (char *) SDATA (dir
) : "")
3181 DEFUN ("access-file", Faccess_file
, Saccess_file
, 2, 2, 0,
3182 doc
: /* Access file FILENAME, and get an error if that does not work.
3183 The second argument STRING is used in the error message.
3184 If there is no error, we return nil. */)
3186 Lisp_Object filename
, string
;
3188 Lisp_Object handler
, encoded_filename
, absname
;
3191 CHECK_STRING (filename
);
3192 absname
= Fexpand_file_name (filename
, Qnil
);
3194 CHECK_STRING (string
);
3196 /* If the file name has special constructs in it,
3197 call the corresponding file handler. */
3198 handler
= Ffind_file_name_handler (absname
, Qaccess_file
);
3199 if (!NILP (handler
))
3200 return call3 (handler
, Qaccess_file
, absname
, string
);
3202 encoded_filename
= ENCODE_FILE (absname
);
3204 fd
= emacs_open (SDATA (encoded_filename
), O_RDONLY
, 0);
3206 report_file_error (SDATA (string
), Fcons (filename
, Qnil
));
3212 DEFUN ("file-symlink-p", Ffile_symlink_p
, Sfile_symlink_p
, 1, 1, 0,
3213 doc
: /* Return non-nil if file FILENAME is the name of a symbolic link.
3214 The value is the link target, as a string.
3215 Otherwise returns nil. */)
3217 Lisp_Object filename
;
3219 Lisp_Object handler
;
3221 CHECK_STRING (filename
);
3222 filename
= Fexpand_file_name (filename
, Qnil
);
3224 /* If the file name has special constructs in it,
3225 call the corresponding file handler. */
3226 handler
= Ffind_file_name_handler (filename
, Qfile_symlink_p
);
3227 if (!NILP (handler
))
3228 return call2 (handler
, Qfile_symlink_p
, filename
);
3237 filename
= ENCODE_FILE (filename
);
3244 buf
= (char *) xrealloc (buf
, bufsize
);
3245 bzero (buf
, bufsize
);
3248 valsize
= readlink (SDATA (filename
), buf
, bufsize
);
3252 /* HP-UX reports ERANGE if buffer is too small. */
3253 if (errno
== ERANGE
)
3263 while (valsize
>= bufsize
);
3265 val
= make_string (buf
, valsize
);
3266 if (buf
[0] == '/' && index (buf
, ':'))
3267 val
= concat2 (build_string ("/:"), val
);
3269 val
= DECODE_FILE (val
);
3272 #else /* not S_IFLNK */
3274 #endif /* not S_IFLNK */
3277 DEFUN ("file-directory-p", Ffile_directory_p
, Sfile_directory_p
, 1, 1, 0,
3278 doc
: /* Return t if FILENAME names an existing directory.
3279 Symbolic links to directories count as directories.
3280 See `file-symlink-p' to distinguish symlinks. */)
3282 Lisp_Object filename
;
3284 register Lisp_Object absname
;
3286 Lisp_Object handler
;
3288 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3290 /* If the file name has special constructs in it,
3291 call the corresponding file handler. */
3292 handler
= Ffind_file_name_handler (absname
, Qfile_directory_p
);
3293 if (!NILP (handler
))
3294 return call2 (handler
, Qfile_directory_p
, absname
);
3296 absname
= ENCODE_FILE (absname
);
3298 if (stat (SDATA (absname
), &st
) < 0)
3300 return (st
.st_mode
& S_IFMT
) == S_IFDIR
? Qt
: Qnil
;
3303 DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p
, Sfile_accessible_directory_p
, 1, 1, 0,
3304 doc
: /* Return t if file FILENAME names a directory you can open.
3305 For the value to be t, FILENAME must specify the name of a directory as a file,
3306 and the directory must allow you to open files in it. In order to use a
3307 directory as a buffer's current directory, this predicate must return true.
3308 A directory name spec may be given instead; then the value is t
3309 if the directory so specified exists and really is a readable and
3310 searchable directory. */)
3312 Lisp_Object filename
;
3314 Lisp_Object handler
;
3316 struct gcpro gcpro1
;
3318 /* If the file name has special constructs in it,
3319 call the corresponding file handler. */
3320 handler
= Ffind_file_name_handler (filename
, Qfile_accessible_directory_p
);
3321 if (!NILP (handler
))
3322 return call2 (handler
, Qfile_accessible_directory_p
, filename
);
3325 tem
= (NILP (Ffile_directory_p (filename
))
3326 || NILP (Ffile_executable_p (filename
)));
3328 return tem
? Qnil
: Qt
;
3331 DEFUN ("file-regular-p", Ffile_regular_p
, Sfile_regular_p
, 1, 1, 0,
3332 doc
: /* Return t if file FILENAME is the name of a regular file.
3333 This is the sort of file that holds an ordinary stream of data bytes. */)
3335 Lisp_Object filename
;
3337 register Lisp_Object absname
;
3339 Lisp_Object handler
;
3341 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3343 /* If the file name has special constructs in it,
3344 call the corresponding file handler. */
3345 handler
= Ffind_file_name_handler (absname
, Qfile_regular_p
);
3346 if (!NILP (handler
))
3347 return call2 (handler
, Qfile_regular_p
, absname
);
3349 absname
= ENCODE_FILE (absname
);
3354 Lisp_Object tem
= Vw32_get_true_file_attributes
;
3356 /* Tell stat to use expensive method to get accurate info. */
3357 Vw32_get_true_file_attributes
= Qt
;
3358 result
= stat (SDATA (absname
), &st
);
3359 Vw32_get_true_file_attributes
= tem
;
3363 return (st
.st_mode
& S_IFMT
) == S_IFREG
? Qt
: Qnil
;
3366 if (stat (SDATA (absname
), &st
) < 0)
3368 return (st
.st_mode
& S_IFMT
) == S_IFREG
? Qt
: Qnil
;
3372 DEFUN ("file-modes", Ffile_modes
, Sfile_modes
, 1, 1, 0,
3373 doc
: /* Return mode bits of file named FILENAME, as an integer.
3374 Return nil, if file does not exist or is not accessible. */)
3376 Lisp_Object filename
;
3378 Lisp_Object absname
;
3380 Lisp_Object handler
;
3382 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3384 /* If the file name has special constructs in it,
3385 call the corresponding file handler. */
3386 handler
= Ffind_file_name_handler (absname
, Qfile_modes
);
3387 if (!NILP (handler
))
3388 return call2 (handler
, Qfile_modes
, absname
);
3390 absname
= ENCODE_FILE (absname
);
3392 if (stat (SDATA (absname
), &st
) < 0)
3394 #if defined (MSDOS) && __DJGPP__ < 2
3395 if (check_executable (SDATA (absname
)))
3396 st
.st_mode
|= S_IEXEC
;
3397 #endif /* MSDOS && __DJGPP__ < 2 */
3399 return make_number (st
.st_mode
& 07777);
3402 DEFUN ("set-file-modes", Fset_file_modes
, Sset_file_modes
, 2, 2, 0,
3403 doc
: /* Set mode bits of file named FILENAME to MODE (an integer).
3404 Only the 12 low bits of MODE are used. */)
3406 Lisp_Object filename
, mode
;
3408 Lisp_Object absname
, encoded_absname
;
3409 Lisp_Object handler
;
3411 absname
= Fexpand_file_name (filename
, current_buffer
->directory
);
3412 CHECK_NUMBER (mode
);
3414 /* If the file name has special constructs in it,
3415 call the corresponding file handler. */
3416 handler
= Ffind_file_name_handler (absname
, Qset_file_modes
);
3417 if (!NILP (handler
))
3418 return call3 (handler
, Qset_file_modes
, absname
, mode
);
3420 encoded_absname
= ENCODE_FILE (absname
);
3422 if (chmod (SDATA (encoded_absname
), XINT (mode
)) < 0)
3423 report_file_error ("Doing chmod", Fcons (absname
, Qnil
));
3428 DEFUN ("set-default-file-modes", Fset_default_file_modes
, Sset_default_file_modes
, 1, 1, 0,
3429 doc
: /* Set the file permission bits for newly created files.
3430 The argument MODE should be an integer; only the low 9 bits are used.
3431 This setting is inherited by subprocesses. */)
3435 CHECK_NUMBER (mode
);
3437 umask ((~ XINT (mode
)) & 0777);
3442 DEFUN ("default-file-modes", Fdefault_file_modes
, Sdefault_file_modes
, 0, 0, 0,
3443 doc
: /* Return the default file protection for created files.
3444 The value is an integer. */)
3450 realmask
= umask (0);
3453 XSETINT (value
, (~ realmask
) & 0777);
3457 extern int lisp_time_argument
P_ ((Lisp_Object
, time_t *, int *));
3459 DEFUN ("set-file-times", Fset_file_times
, Sset_file_times
, 1, 2, 0,
3460 doc
: /* Set times of file FILENAME to TIME.
3461 Set both access and modification times.
3462 Return t on success, else nil.
3463 Use the current time if TIME is nil. TIME is in the format of
3466 Lisp_Object filename
, time
;
3468 Lisp_Object absname
, encoded_absname
;
3469 Lisp_Object handler
;
3473 if (! lisp_time_argument (time
, &sec
, &usec
))
3474 error ("Invalid time specification");
3476 absname
= Fexpand_file_name (filename
, current_buffer
->directory
);
3478 /* If the file name has special constructs in it,
3479 call the corresponding file handler. */
3480 handler
= Ffind_file_name_handler (absname
, Qset_file_times
);
3481 if (!NILP (handler
))
3482 return call3 (handler
, Qset_file_times
, absname
, time
);
3484 encoded_absname
= ENCODE_FILE (absname
);
3489 EMACS_SET_SECS (t
, sec
);
3490 EMACS_SET_USECS (t
, usec
);
3492 if (set_file_times (SDATA (encoded_absname
), t
, t
))
3497 /* Setting times on a directory always fails. */
3498 if (stat (SDATA (encoded_absname
), &st
) == 0
3499 && (st
.st_mode
& S_IFMT
) == S_IFDIR
)
3502 report_file_error ("Setting file times", Fcons (absname
, Qnil
));
3515 DEFUN ("unix-sync", Funix_sync
, Sunix_sync
, 0, 0, "",
3516 doc
: /* Tell Unix to finish all pending disk updates. */)
3525 DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p
, Sfile_newer_than_file_p
, 2, 2, 0,
3526 doc
: /* Return t if file FILE1 is newer than file FILE2.
3527 If FILE1 does not exist, the answer is nil;
3528 otherwise, if FILE2 does not exist, the answer is t. */)
3530 Lisp_Object file1
, file2
;
3532 Lisp_Object absname1
, absname2
;
3535 Lisp_Object handler
;
3536 struct gcpro gcpro1
, gcpro2
;
3538 CHECK_STRING (file1
);
3539 CHECK_STRING (file2
);
3542 GCPRO2 (absname1
, file2
);
3543 absname1
= expand_and_dir_to_file (file1
, current_buffer
->directory
);
3544 absname2
= expand_and_dir_to_file (file2
, current_buffer
->directory
);
3547 /* If the file name has special constructs in it,
3548 call the corresponding file handler. */
3549 handler
= Ffind_file_name_handler (absname1
, Qfile_newer_than_file_p
);
3551 handler
= Ffind_file_name_handler (absname2
, Qfile_newer_than_file_p
);
3552 if (!NILP (handler
))
3553 return call3 (handler
, Qfile_newer_than_file_p
, absname1
, absname2
);
3555 GCPRO2 (absname1
, absname2
);
3556 absname1
= ENCODE_FILE (absname1
);
3557 absname2
= ENCODE_FILE (absname2
);
3560 if (stat (SDATA (absname1
), &st
) < 0)
3563 mtime1
= st
.st_mtime
;
3565 if (stat (SDATA (absname2
), &st
) < 0)
3568 return (mtime1
> st
.st_mtime
) ? Qt
: Qnil
;
3572 Lisp_Object Qfind_buffer_file_type
;
3575 #ifndef READ_BUF_SIZE
3576 #define READ_BUF_SIZE (64 << 10)
3579 extern void adjust_markers_for_delete
P_ ((int, int, int, int));
3581 /* This function is called after Lisp functions to decide a coding
3582 system are called, or when they cause an error. Before they are
3583 called, the current buffer is set unibyte and it contains only a
3584 newly inserted text (thus the buffer was empty before the
3587 The functions may set markers, overlays, text properties, or even
3588 alter the buffer contents, change the current buffer.
3590 Here, we reset all those changes by:
3591 o set back the current buffer.
3592 o move all markers and overlays to BEG.
3593 o remove all text properties.
3594 o set back the buffer multibyteness. */
3597 decide_coding_unwind (unwind_data
)
3598 Lisp_Object unwind_data
;
3600 Lisp_Object multibyte
, undo_list
, buffer
;
3602 multibyte
= XCAR (unwind_data
);
3603 unwind_data
= XCDR (unwind_data
);
3604 undo_list
= XCAR (unwind_data
);
3605 buffer
= XCDR (unwind_data
);
3607 if (current_buffer
!= XBUFFER (buffer
))
3608 set_buffer_internal (XBUFFER (buffer
));
3609 adjust_markers_for_delete (BEG
, BEG_BYTE
, Z
, Z_BYTE
);
3610 adjust_overlays_for_delete (BEG
, Z
- BEG
);
3611 BUF_INTERVALS (current_buffer
) = 0;
3612 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
3614 /* Now we are safe to change the buffer's multibyteness directly. */
3615 current_buffer
->enable_multibyte_characters
= multibyte
;
3616 current_buffer
->undo_list
= undo_list
;
3622 /* Used to pass values from insert-file-contents to read_non_regular. */
3624 static int non_regular_fd
;
3625 static int non_regular_inserted
;
3626 static int non_regular_nbytes
;
3629 /* Read from a non-regular file.
3630 Read non_regular_trytry bytes max from non_regular_fd.
3631 Non_regular_inserted specifies where to put the read bytes.
3632 Value is the number of bytes read. */
3641 nbytes
= emacs_read (non_regular_fd
,
3642 BEG_ADDR
+ PT_BYTE
- BEG_BYTE
+ non_regular_inserted
,
3643 non_regular_nbytes
);
3645 return make_number (nbytes
);
3649 /* Condition-case handler used when reading from non-regular files
3650 in insert-file-contents. */
3653 read_non_regular_quit ()
3659 DEFUN ("insert-file-contents", Finsert_file_contents
, Sinsert_file_contents
,
3661 doc
: /* Insert contents of file FILENAME after point.
3662 Returns list of absolute file name and number of characters inserted.
3663 If second argument VISIT is non-nil, the buffer's visited filename
3664 and last save file modtime are set, and it is marked unmodified.
3665 If visiting and the file does not exist, visiting is completed
3666 before the error is signaled.
3667 The optional third and fourth arguments BEG and END
3668 specify what portion of the file to insert.
3669 These arguments count bytes in the file, not characters in the buffer.
3670 If VISIT is non-nil, BEG and END must be nil.
3672 If optional fifth argument REPLACE is non-nil,
3673 it means replace the current buffer contents (in the accessible portion)
3674 with the file contents. This is better than simply deleting and inserting
3675 the whole thing because (1) it preserves some marker positions
3676 and (2) it puts less data in the undo list.
3677 When REPLACE is non-nil, the value is the number of characters actually read,
3678 which is often less than the number of characters to be read.
3680 This does code conversion according to the value of
3681 `coding-system-for-read' or `file-coding-system-alist',
3682 and sets the variable `last-coding-system-used' to the coding system
3684 (filename
, visit
, beg
, end
, replace
)
3685 Lisp_Object filename
, visit
, beg
, end
, replace
;
3690 register int how_much
;
3691 register int unprocessed
;
3692 int count
= SPECPDL_INDEX ();
3693 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3694 Lisp_Object handler
, val
, insval
, orig_filename
;
3697 int not_regular
= 0;
3698 unsigned char read_buf
[READ_BUF_SIZE
];
3699 struct coding_system coding
;
3700 unsigned char buffer
[1 << 14];
3701 int replace_handled
= 0;
3702 int set_coding_system
= 0;
3703 int coding_system_decided
= 0;
3706 if (current_buffer
->base_buffer
&& ! NILP (visit
))
3707 error ("Cannot do file visiting in an indirect buffer");
3709 if (!NILP (current_buffer
->read_only
))
3710 Fbarf_if_buffer_read_only ();
3714 orig_filename
= Qnil
;
3716 GCPRO4 (filename
, val
, p
, orig_filename
);
3718 CHECK_STRING (filename
);
3719 filename
= Fexpand_file_name (filename
, Qnil
);
3721 /* If the file name has special constructs in it,
3722 call the corresponding file handler. */
3723 handler
= Ffind_file_name_handler (filename
, Qinsert_file_contents
);
3724 if (!NILP (handler
))
3726 val
= call6 (handler
, Qinsert_file_contents
, filename
,
3727 visit
, beg
, end
, replace
);
3728 if (CONSP (val
) && CONSP (XCDR (val
)))
3729 inserted
= XINT (XCAR (XCDR (val
)));
3733 orig_filename
= filename
;
3734 filename
= ENCODE_FILE (filename
);
3740 Lisp_Object tem
= Vw32_get_true_file_attributes
;
3742 /* Tell stat to use expensive method to get accurate info. */
3743 Vw32_get_true_file_attributes
= Qt
;
3744 total
= stat (SDATA (filename
), &st
);
3745 Vw32_get_true_file_attributes
= tem
;
3750 if (stat (SDATA (filename
), &st
) < 0)
3752 if ((fd
= emacs_open (SDATA (filename
), O_RDONLY
, 0)) < 0
3753 || fstat (fd
, &st
) < 0)
3754 #endif /* not APOLLO */
3755 #endif /* WINDOWSNT */
3757 if (fd
>= 0) emacs_close (fd
);
3760 report_file_error ("Opening input file", Fcons (orig_filename
, Qnil
));
3763 if (!NILP (Vcoding_system_for_read
))
3764 Fset (Qbuffer_file_coding_system
, Vcoding_system_for_read
);
3769 /* This code will need to be changed in order to work on named
3770 pipes, and it's probably just not worth it. So we should at
3771 least signal an error. */
3772 if (!S_ISREG (st
.st_mode
))
3779 if (! NILP (replace
) || ! NILP (beg
) || ! NILP (end
))
3780 Fsignal (Qfile_error
,
3781 Fcons (build_string ("not a regular file"),
3782 Fcons (orig_filename
, Qnil
)));
3787 if ((fd
= emacs_open (SDATA (filename
), O_RDONLY
, 0)) < 0)
3790 /* Replacement should preserve point as it preserves markers. */
3791 if (!NILP (replace
))
3792 record_unwind_protect (restore_point_unwind
, Fpoint_marker ());
3794 record_unwind_protect (close_file_unwind
, make_number (fd
));
3796 /* Supposedly happens on VMS. */
3797 /* Can happen on any platform that uses long as type of off_t, but allows
3798 file sizes to exceed 2Gb. VMS is no longer officially supported, so
3799 give a message suitable for the latter case. */
3800 if (! not_regular
&& st
.st_size
< 0)
3801 error ("Maximum buffer size exceeded");
3803 /* Prevent redisplay optimizations. */
3804 current_buffer
->clip_changed
= 1;
3808 if (!NILP (beg
) || !NILP (end
))
3809 error ("Attempt to visit less than an entire file");
3810 if (BEG
< Z
&& NILP (replace
))
3811 error ("Cannot do file visiting in a non-empty buffer");
3817 XSETFASTINT (beg
, 0);
3825 XSETINT (end
, st
.st_size
);
3827 /* Arithmetic overflow can occur if an Emacs integer cannot
3828 represent the file size, or if the calculations below
3829 overflow. The calculations below double the file size
3830 twice, so check that it can be multiplied by 4 safely. */
3831 if (XINT (end
) != st
.st_size
3832 || ((int) st
.st_size
* 4) / 4 != st
.st_size
)
3833 error ("Maximum buffer size exceeded");
3835 /* The file size returned from stat may be zero, but data
3836 may be readable nonetheless, for example when this is a
3837 file in the /proc filesystem. */
3838 if (st
.st_size
== 0)
3839 XSETINT (end
, READ_BUF_SIZE
);
3843 if (EQ (Vcoding_system_for_read
, Qauto_save_coding
))
3845 /* We use emacs-mule for auto saving... */
3846 setup_coding_system (Qemacs_mule
, &coding
);
3847 /* ... but with the special flag to indicate to read in a
3848 multibyte sequence for eight-bit-control char as is. */
3850 coding
.src_multibyte
= 0;
3851 coding
.dst_multibyte
3852 = !NILP (current_buffer
->enable_multibyte_characters
);
3853 coding
.eol_type
= CODING_EOL_LF
;
3854 coding_system_decided
= 1;
3858 /* Decide the coding system to use for reading the file now
3859 because we can't use an optimized method for handling
3860 `coding:' tag if the current buffer is not empty. */
3864 if (!NILP (Vcoding_system_for_read
))
3865 val
= Vcoding_system_for_read
;
3868 /* Don't try looking inside a file for a coding system
3869 specification if it is not seekable. */
3870 if (! not_regular
&& ! NILP (Vset_auto_coding_function
))
3872 /* Find a coding system specified in the heading two
3873 lines or in the tailing several lines of the file.
3874 We assume that the 1K-byte and 3K-byte for heading
3875 and tailing respectively are sufficient for this
3879 if (st
.st_size
<= (1024 * 4))
3880 nread
= emacs_read (fd
, read_buf
, 1024 * 4);
3883 nread
= emacs_read (fd
, read_buf
, 1024);
3886 if (lseek (fd
, st
.st_size
- (1024 * 3), 0) < 0)
3887 report_file_error ("Setting file position",
3888 Fcons (orig_filename
, Qnil
));
3889 nread
+= emacs_read (fd
, read_buf
+ nread
, 1024 * 3);
3894 error ("IO error reading %s: %s",
3895 SDATA (orig_filename
), emacs_strerror (errno
));
3898 struct buffer
*prev
= current_buffer
;
3902 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
3904 buffer
= Fget_buffer_create (build_string (" *code-converting-work*"));
3905 buf
= XBUFFER (buffer
);
3907 delete_all_overlays (buf
);
3908 buf
->directory
= current_buffer
->directory
;
3909 buf
->read_only
= Qnil
;
3910 buf
->filename
= Qnil
;
3911 buf
->undo_list
= Qt
;
3912 eassert (buf
->overlays_before
== NULL
);
3913 eassert (buf
->overlays_after
== NULL
);
3915 set_buffer_internal (buf
);
3917 buf
->enable_multibyte_characters
= Qnil
;
3919 insert_1_both (read_buf
, nread
, nread
, 0, 0, 0);
3920 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
3921 val
= call2 (Vset_auto_coding_function
,
3922 filename
, make_number (nread
));
3923 set_buffer_internal (prev
);
3925 /* Discard the unwind protect for recovering the
3929 /* Rewind the file for the actual read done later. */
3930 if (lseek (fd
, 0, 0) < 0)
3931 report_file_error ("Setting file position",
3932 Fcons (orig_filename
, Qnil
));
3938 /* If we have not yet decided a coding system, check
3939 file-coding-system-alist. */
3940 Lisp_Object args
[6], coding_systems
;
3942 args
[0] = Qinsert_file_contents
, args
[1] = orig_filename
;
3943 args
[2] = visit
, args
[3] = beg
, args
[4] = end
, args
[5] = replace
;
3944 coding_systems
= Ffind_operation_coding_system (6, args
);
3945 if (CONSP (coding_systems
))
3946 val
= XCAR (coding_systems
);
3950 setup_coding_system (Fcheck_coding_system (val
), &coding
);
3951 /* Ensure we set Vlast_coding_system_used. */
3952 set_coding_system
= 1;
3954 if (NILP (current_buffer
->enable_multibyte_characters
)
3956 /* We must suppress all character code conversion except for
3957 end-of-line conversion. */
3958 setup_raw_text_coding_system (&coding
);
3960 coding
.src_multibyte
= 0;
3961 coding
.dst_multibyte
3962 = !NILP (current_buffer
->enable_multibyte_characters
);
3963 coding_system_decided
= 1;
3966 /* If requested, replace the accessible part of the buffer
3967 with the file contents. Avoid replacing text at the
3968 beginning or end of the buffer that matches the file contents;
3969 that preserves markers pointing to the unchanged parts.
3971 Here we implement this feature in an optimized way
3972 for the case where code conversion is NOT needed.
3973 The following if-statement handles the case of conversion
3974 in a less optimal way.
3976 If the code conversion is "automatic" then we try using this
3977 method and hope for the best.
3978 But if we discover the need for conversion, we give up on this method
3979 and let the following if-statement handle the replace job. */
3982 && !(coding
.common_flags
& CODING_REQUIRE_DECODING_MASK
))
3984 /* same_at_start and same_at_end count bytes,
3985 because file access counts bytes
3986 and BEG and END count bytes. */
3987 int same_at_start
= BEGV_BYTE
;
3988 int same_at_end
= ZV_BYTE
;
3990 /* There is still a possibility we will find the need to do code
3991 conversion. If that happens, we set this variable to 1 to
3992 give up on handling REPLACE in the optimized way. */
3993 int giveup_match_end
= 0;
3995 if (XINT (beg
) != 0)
3997 if (lseek (fd
, XINT (beg
), 0) < 0)
3998 report_file_error ("Setting file position",
3999 Fcons (orig_filename
, Qnil
));
4004 /* Count how many chars at the start of the file
4005 match the text at the beginning of the buffer. */
4010 nread
= emacs_read (fd
, buffer
, sizeof buffer
);
4012 error ("IO error reading %s: %s",
4013 SDATA (orig_filename
), emacs_strerror (errno
));
4014 else if (nread
== 0)
4017 if (coding
.type
== coding_type_undecided
)
4018 detect_coding (&coding
, buffer
, nread
);
4019 if (coding
.common_flags
& CODING_REQUIRE_DECODING_MASK
)
4020 /* We found that the file should be decoded somehow.
4021 Let's give up here. */
4023 giveup_match_end
= 1;
4027 if (coding
.eol_type
== CODING_EOL_UNDECIDED
)
4028 detect_eol (&coding
, buffer
, nread
);
4029 if (coding
.eol_type
!= CODING_EOL_UNDECIDED
4030 && coding
.eol_type
!= CODING_EOL_LF
)
4031 /* We found that the format of eol should be decoded.
4032 Let's give up here. */
4034 giveup_match_end
= 1;
4039 while (bufpos
< nread
&& same_at_start
< ZV_BYTE
4040 && FETCH_BYTE (same_at_start
) == buffer
[bufpos
])
4041 same_at_start
++, bufpos
++;
4042 /* If we found a discrepancy, stop the scan.
4043 Otherwise loop around and scan the next bufferful. */
4044 if (bufpos
!= nread
)
4048 /* If the file matches the buffer completely,
4049 there's no need to replace anything. */
4050 if (same_at_start
- BEGV_BYTE
== XINT (end
))
4054 /* Truncate the buffer to the size of the file. */
4055 del_range_1 (same_at_start
, same_at_end
, 0, 0);
4060 /* Count how many chars at the end of the file
4061 match the text at the end of the buffer. But, if we have
4062 already found that decoding is necessary, don't waste time. */
4063 while (!giveup_match_end
)
4065 int total_read
, nread
, bufpos
, curpos
, trial
;
4067 /* At what file position are we now scanning? */
4068 curpos
= XINT (end
) - (ZV_BYTE
- same_at_end
);
4069 /* If the entire file matches the buffer tail, stop the scan. */
4072 /* How much can we scan in the next step? */
4073 trial
= min (curpos
, sizeof buffer
);
4074 if (lseek (fd
, curpos
- trial
, 0) < 0)
4075 report_file_error ("Setting file position",
4076 Fcons (orig_filename
, Qnil
));
4078 total_read
= nread
= 0;
4079 while (total_read
< trial
)
4081 nread
= emacs_read (fd
, buffer
+ total_read
, trial
- total_read
);
4083 error ("IO error reading %s: %s",
4084 SDATA (orig_filename
), emacs_strerror (errno
));
4085 else if (nread
== 0)
4087 total_read
+= nread
;
4090 /* Scan this bufferful from the end, comparing with
4091 the Emacs buffer. */
4092 bufpos
= total_read
;
4094 /* Compare with same_at_start to avoid counting some buffer text
4095 as matching both at the file's beginning and at the end. */
4096 while (bufpos
> 0 && same_at_end
> same_at_start
4097 && FETCH_BYTE (same_at_end
- 1) == buffer
[bufpos
- 1])
4098 same_at_end
--, bufpos
--;
4100 /* If we found a discrepancy, stop the scan.
4101 Otherwise loop around and scan the preceding bufferful. */
4104 /* If this discrepancy is because of code conversion,
4105 we cannot use this method; giveup and try the other. */
4106 if (same_at_end
> same_at_start
4107 && FETCH_BYTE (same_at_end
- 1) >= 0200
4108 && ! NILP (current_buffer
->enable_multibyte_characters
)
4109 && (CODING_MAY_REQUIRE_DECODING (&coding
)))
4110 giveup_match_end
= 1;
4119 if (! giveup_match_end
)
4123 /* We win! We can handle REPLACE the optimized way. */
4125 /* Extend the start of non-matching text area to multibyte
4126 character boundary. */
4127 if (! NILP (current_buffer
->enable_multibyte_characters
))
4128 while (same_at_start
> BEGV_BYTE
4129 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start
)))
4132 /* Extend the end of non-matching text area to multibyte
4133 character boundary. */
4134 if (! NILP (current_buffer
->enable_multibyte_characters
))
4135 while (same_at_end
< ZV_BYTE
4136 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end
)))
4139 /* Don't try to reuse the same piece of text twice. */
4140 overlap
= (same_at_start
- BEGV_BYTE
4141 - (same_at_end
+ st
.st_size
- ZV
));
4143 same_at_end
+= overlap
;
4145 /* Arrange to read only the nonmatching middle part of the file. */
4146 XSETFASTINT (beg
, XINT (beg
) + (same_at_start
- BEGV_BYTE
));
4147 XSETFASTINT (end
, XINT (end
) - (ZV_BYTE
- same_at_end
));
4149 del_range_byte (same_at_start
, same_at_end
, 0);
4150 /* Insert from the file at the proper position. */
4151 temp
= BYTE_TO_CHAR (same_at_start
);
4152 SET_PT_BOTH (temp
, same_at_start
);
4154 /* If display currently starts at beginning of line,
4155 keep it that way. */
4156 if (XBUFFER (XWINDOW (selected_window
)->buffer
) == current_buffer
)
4157 XWINDOW (selected_window
)->start_at_line_beg
= Fbolp ();
4159 replace_handled
= 1;
4163 /* If requested, replace the accessible part of the buffer
4164 with the file contents. Avoid replacing text at the
4165 beginning or end of the buffer that matches the file contents;
4166 that preserves markers pointing to the unchanged parts.
4168 Here we implement this feature for the case where code conversion
4169 is needed, in a simple way that needs a lot of memory.
4170 The preceding if-statement handles the case of no conversion
4171 in a more optimized way. */
4172 if (!NILP (replace
) && ! replace_handled
&& BEGV
< ZV
)
4174 int same_at_start
= BEGV_BYTE
;
4175 int same_at_end
= ZV_BYTE
;
4178 /* Make sure that the gap is large enough. */
4179 int bufsize
= 2 * st
.st_size
;
4180 unsigned char *conversion_buffer
= (unsigned char *) xmalloc (bufsize
);
4183 /* First read the whole file, performing code conversion into
4184 CONVERSION_BUFFER. */
4186 if (lseek (fd
, XINT (beg
), 0) < 0)
4188 xfree (conversion_buffer
);
4189 report_file_error ("Setting file position",
4190 Fcons (orig_filename
, Qnil
));
4193 total
= st
.st_size
; /* Total bytes in the file. */
4194 how_much
= 0; /* Bytes read from file so far. */
4195 inserted
= 0; /* Bytes put into CONVERSION_BUFFER so far. */
4196 unprocessed
= 0; /* Bytes not processed in previous loop. */
4198 while (how_much
< total
)
4200 /* try is reserved in some compilers (Microsoft C) */
4201 int trytry
= min (total
- how_much
, READ_BUF_SIZE
- unprocessed
);
4202 unsigned char *destination
= read_buf
+ unprocessed
;
4205 /* Allow quitting out of the actual I/O. */
4208 this = emacs_read (fd
, destination
, trytry
);
4211 if (this < 0 || this + unprocessed
== 0)
4219 if (CODING_MAY_REQUIRE_DECODING (&coding
))
4221 int require
, result
;
4223 this += unprocessed
;
4225 /* If we are using more space than estimated,
4226 make CONVERSION_BUFFER bigger. */
4227 require
= decoding_buffer_size (&coding
, this);
4228 if (inserted
+ require
+ 2 * (total
- how_much
) > bufsize
)
4230 bufsize
= inserted
+ require
+ 2 * (total
- how_much
);
4231 conversion_buffer
= (unsigned char *) xrealloc (conversion_buffer
, bufsize
);
4234 /* Convert this batch with results in CONVERSION_BUFFER. */
4235 if (how_much
>= total
) /* This is the last block. */
4236 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
4237 if (coding
.composing
!= COMPOSITION_DISABLED
)
4238 coding_allocate_composition_data (&coding
, BEGV
);
4239 result
= decode_coding (&coding
, read_buf
,
4240 conversion_buffer
+ inserted
,
4241 this, bufsize
- inserted
);
4243 /* Save for next iteration whatever we didn't convert. */
4244 unprocessed
= this - coding
.consumed
;
4245 bcopy (read_buf
+ coding
.consumed
, read_buf
, unprocessed
);
4246 if (!NILP (current_buffer
->enable_multibyte_characters
))
4247 this = coding
.produced
;
4249 this = str_as_unibyte (conversion_buffer
+ inserted
,
4256 /* At this point, INSERTED is how many characters (i.e. bytes)
4257 are present in CONVERSION_BUFFER.
4258 HOW_MUCH should equal TOTAL,
4259 or should be <= 0 if we couldn't read the file. */
4263 xfree (conversion_buffer
);
4264 coding_free_composition_data (&coding
);
4266 error ("IO error reading %s: %s",
4267 SDATA (orig_filename
), emacs_strerror (errno
));
4268 else if (how_much
== -2)
4269 error ("maximum buffer size exceeded");
4272 /* Compare the beginning of the converted file
4273 with the buffer text. */
4276 while (bufpos
< inserted
&& same_at_start
< same_at_end
4277 && FETCH_BYTE (same_at_start
) == conversion_buffer
[bufpos
])
4278 same_at_start
++, bufpos
++;
4280 /* If the file matches the buffer completely,
4281 there's no need to replace anything. */
4283 if (bufpos
== inserted
)
4285 xfree (conversion_buffer
);
4286 coding_free_composition_data (&coding
);
4289 /* Truncate the buffer to the size of the file. */
4290 del_range_byte (same_at_start
, same_at_end
, 0);
4295 /* Extend the start of non-matching text area to multibyte
4296 character boundary. */
4297 if (! NILP (current_buffer
->enable_multibyte_characters
))
4298 while (same_at_start
> BEGV_BYTE
4299 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start
)))
4302 /* Scan this bufferful from the end, comparing with
4303 the Emacs buffer. */
4306 /* Compare with same_at_start to avoid counting some buffer text
4307 as matching both at the file's beginning and at the end. */
4308 while (bufpos
> 0 && same_at_end
> same_at_start
4309 && FETCH_BYTE (same_at_end
- 1) == conversion_buffer
[bufpos
- 1])
4310 same_at_end
--, bufpos
--;
4312 /* Extend the end of non-matching text area to multibyte
4313 character boundary. */
4314 if (! NILP (current_buffer
->enable_multibyte_characters
))
4315 while (same_at_end
< ZV_BYTE
4316 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end
)))
4319 /* Don't try to reuse the same piece of text twice. */
4320 overlap
= same_at_start
- BEGV_BYTE
- (same_at_end
+ inserted
- ZV_BYTE
);
4322 same_at_end
+= overlap
;
4324 /* If display currently starts at beginning of line,
4325 keep it that way. */
4326 if (XBUFFER (XWINDOW (selected_window
)->buffer
) == current_buffer
)
4327 XWINDOW (selected_window
)->start_at_line_beg
= Fbolp ();
4329 /* Replace the chars that we need to replace,
4330 and update INSERTED to equal the number of bytes
4331 we are taking from the file. */
4332 inserted
-= (ZV_BYTE
- same_at_end
) + (same_at_start
- BEGV_BYTE
);
4334 if (same_at_end
!= same_at_start
)
4336 del_range_byte (same_at_start
, same_at_end
, 0);
4338 same_at_start
= GPT_BYTE
;
4342 temp
= BYTE_TO_CHAR (same_at_start
);
4344 /* Insert from the file at the proper position. */
4345 SET_PT_BOTH (temp
, same_at_start
);
4346 insert_1 (conversion_buffer
+ same_at_start
- BEGV_BYTE
, inserted
,
4348 if (coding
.cmp_data
&& coding
.cmp_data
->used
)
4349 coding_restore_composition (&coding
, Fcurrent_buffer ());
4350 coding_free_composition_data (&coding
);
4352 /* Set `inserted' to the number of inserted characters. */
4353 inserted
= PT
- temp
;
4355 xfree (conversion_buffer
);
4364 register Lisp_Object temp
;
4366 total
= XINT (end
) - XINT (beg
);
4368 /* Make sure point-max won't overflow after this insertion. */
4369 XSETINT (temp
, total
);
4370 if (total
!= XINT (temp
))
4371 error ("Maximum buffer size exceeded");
4374 /* For a special file, all we can do is guess. */
4375 total
= READ_BUF_SIZE
;
4377 if (NILP (visit
) && total
> 0)
4378 prepare_to_modify_buffer (PT
, PT
, NULL
);
4381 if (GAP_SIZE
< total
)
4382 make_gap (total
- GAP_SIZE
);
4384 if (XINT (beg
) != 0 || !NILP (replace
))
4386 if (lseek (fd
, XINT (beg
), 0) < 0)
4387 report_file_error ("Setting file position",
4388 Fcons (orig_filename
, Qnil
));
4391 /* In the following loop, HOW_MUCH contains the total bytes read so
4392 far for a regular file, and not changed for a special file. But,
4393 before exiting the loop, it is set to a negative value if I/O
4397 /* Total bytes inserted. */
4400 /* Here, we don't do code conversion in the loop. It is done by
4401 code_convert_region after all data are read into the buffer. */
4403 int gap_size
= GAP_SIZE
;
4405 while (how_much
< total
)
4407 /* try is reserved in some compilers (Microsoft C) */
4408 int trytry
= min (total
- how_much
, READ_BUF_SIZE
);
4415 /* Maybe make more room. */
4416 if (gap_size
< trytry
)
4418 make_gap (total
- gap_size
);
4419 gap_size
= GAP_SIZE
;
4422 /* Read from the file, capturing `quit'. When an
4423 error occurs, end the loop, and arrange for a quit
4424 to be signaled after decoding the text we read. */
4425 non_regular_fd
= fd
;
4426 non_regular_inserted
= inserted
;
4427 non_regular_nbytes
= trytry
;
4428 val
= internal_condition_case_1 (read_non_regular
, Qnil
, Qerror
,
4429 read_non_regular_quit
);
4440 /* Allow quitting out of the actual I/O. We don't make text
4441 part of the buffer until all the reading is done, so a C-g
4442 here doesn't do any harm. */
4445 this = emacs_read (fd
, BEG_ADDR
+ PT_BYTE
- BEG_BYTE
+ inserted
, trytry
);
4457 /* For a regular file, where TOTAL is the real size,
4458 count HOW_MUCH to compare with it.
4459 For a special file, where TOTAL is just a buffer size,
4460 so don't bother counting in HOW_MUCH.
4461 (INSERTED is where we count the number of characters inserted.) */
4468 /* Make the text read part of the buffer. */
4469 GAP_SIZE
-= inserted
;
4471 GPT_BYTE
+= inserted
;
4473 ZV_BYTE
+= inserted
;
4478 /* Put an anchor to ensure multi-byte form ends at gap. */
4483 /* Discard the unwind protect for closing the file. */
4487 error ("IO error reading %s: %s",
4488 SDATA (orig_filename
), emacs_strerror (errno
));
4492 if (! coding_system_decided
)
4494 /* The coding system is not yet decided. Decide it by an
4495 optimized method for handling `coding:' tag.
4497 Note that we can get here only if the buffer was empty
4498 before the insertion. */
4502 if (!NILP (Vcoding_system_for_read
))
4503 val
= Vcoding_system_for_read
;
4506 /* Since we are sure that the current buffer was empty
4507 before the insertion, we can toggle
4508 enable-multibyte-characters directly here without taking
4509 care of marker adjustment and byte combining problem. By
4510 this way, we can run Lisp program safely before decoding
4511 the inserted text. */
4512 Lisp_Object unwind_data
;
4513 int count
= SPECPDL_INDEX ();
4515 unwind_data
= Fcons (current_buffer
->enable_multibyte_characters
,
4516 Fcons (current_buffer
->undo_list
,
4517 Fcurrent_buffer ()));
4518 current_buffer
->enable_multibyte_characters
= Qnil
;
4519 current_buffer
->undo_list
= Qt
;
4520 record_unwind_protect (decide_coding_unwind
, unwind_data
);
4522 if (inserted
> 0 && ! NILP (Vset_auto_coding_function
))
4524 val
= call2 (Vset_auto_coding_function
,
4525 filename
, make_number (inserted
));
4530 /* If the coding system is not yet decided, check
4531 file-coding-system-alist. */
4532 Lisp_Object args
[6], coding_systems
;
4534 args
[0] = Qinsert_file_contents
, args
[1] = orig_filename
;
4535 args
[2] = visit
, args
[3] = beg
, args
[4] = end
, args
[5] = Qnil
;
4536 coding_systems
= Ffind_operation_coding_system (6, args
);
4537 if (CONSP (coding_systems
))
4538 val
= XCAR (coding_systems
);
4541 unbind_to (count
, Qnil
);
4542 inserted
= Z_BYTE
- BEG_BYTE
;
4545 /* The following kludgy code is to avoid some compiler bug.
4547 setup_coding_system (val, &coding);
4550 struct coding_system temp_coding
;
4551 setup_coding_system (val
, &temp_coding
);
4552 bcopy (&temp_coding
, &coding
, sizeof coding
);
4554 /* Ensure we set Vlast_coding_system_used. */
4555 set_coding_system
= 1;
4557 if (NILP (current_buffer
->enable_multibyte_characters
)
4559 /* We must suppress all character code conversion except for
4560 end-of-line conversion. */
4561 setup_raw_text_coding_system (&coding
);
4562 coding
.src_multibyte
= 0;
4563 coding
.dst_multibyte
4564 = !NILP (current_buffer
->enable_multibyte_characters
);
4568 /* Can't do this if part of the buffer might be preserved. */
4570 && (coding
.type
== coding_type_no_conversion
4571 || coding
.type
== coding_type_raw_text
))
4573 /* Visiting a file with these coding system makes the buffer
4575 current_buffer
->enable_multibyte_characters
= Qnil
;
4576 coding
.dst_multibyte
= 0;
4579 if (inserted
> 0 || coding
.type
== coding_type_ccl
)
4581 if (CODING_MAY_REQUIRE_DECODING (&coding
))
4583 code_convert_region (PT
, PT_BYTE
, PT
+ inserted
, PT_BYTE
+ inserted
,
4585 inserted
= coding
.produced_char
;
4588 adjust_after_insert (PT
, PT_BYTE
, PT
+ inserted
, PT_BYTE
+ inserted
,
4592 /* Now INSERTED is measured in characters. */
4595 /* Use the conversion type to determine buffer-file-type
4596 (find-buffer-file-type is now used to help determine the
4598 if ((coding
.eol_type
== CODING_EOL_UNDECIDED
4599 || coding
.eol_type
== CODING_EOL_LF
)
4600 && ! CODING_REQUIRE_DECODING (&coding
))
4601 current_buffer
->buffer_file_type
= Qt
;
4603 current_buffer
->buffer_file_type
= Qnil
;
4610 if (!EQ (current_buffer
->undo_list
, Qt
))
4611 current_buffer
->undo_list
= Qnil
;
4613 stat (SDATA (filename
), &st
);
4618 current_buffer
->modtime
= st
.st_mtime
;
4619 current_buffer
->filename
= orig_filename
;
4622 SAVE_MODIFF
= MODIFF
;
4623 current_buffer
->auto_save_modified
= MODIFF
;
4624 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
4625 #ifdef CLASH_DETECTION
4628 if (!NILP (current_buffer
->file_truename
))
4629 unlock_file (current_buffer
->file_truename
);
4630 unlock_file (filename
);
4632 #endif /* CLASH_DETECTION */
4634 Fsignal (Qfile_error
,
4635 Fcons (build_string ("not a regular file"),
4636 Fcons (orig_filename
, Qnil
)));
4639 if (set_coding_system
)
4640 Vlast_coding_system_used
= coding
.symbol
;
4642 if (! NILP (Ffboundp (Qafter_insert_file_set_coding
)))
4644 insval
= call2 (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
;
5691 ring_bell (XFRAME (selected_frame
));
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 (HAVE_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 (HAVE_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. */
6388 Lisp_Object val1
= double_dollars (val
);
6389 tem
= Fsymbol_value (Qfile_name_history
);
6390 if (history_delete_duplicates
)
6391 XSETCDR (tem
, Fdelete (val1
, XCDR(tem
)));
6392 XSETCAR (tem
, val1
);
6394 else if (add_to_history
)
6396 /* Add the value to the history--but not if it matches
6397 the last value already there. */
6398 Lisp_Object val1
= double_dollars (val
);
6399 tem
= Fsymbol_value (Qfile_name_history
);
6400 if (! CONSP (tem
) || NILP (Fequal (XCAR (tem
), val1
)))
6402 if (history_delete_duplicates
) tem
= Fdelete (val1
, tem
);
6403 Fset (Qfile_name_history
, Fcons (val1
, tem
));
6414 /* Must be set before any path manipulation is performed. */
6415 XSETFASTINT (Vdirectory_sep_char
, '/');
6422 Qexpand_file_name
= intern ("expand-file-name");
6423 Qsubstitute_in_file_name
= intern ("substitute-in-file-name");
6424 Qdirectory_file_name
= intern ("directory-file-name");
6425 Qfile_name_directory
= intern ("file-name-directory");
6426 Qfile_name_nondirectory
= intern ("file-name-nondirectory");
6427 Qunhandled_file_name_directory
= intern ("unhandled-file-name-directory");
6428 Qfile_name_as_directory
= intern ("file-name-as-directory");
6429 Qcopy_file
= intern ("copy-file");
6430 Qmake_directory_internal
= intern ("make-directory-internal");
6431 Qmake_directory
= intern ("make-directory");
6432 Qdelete_directory
= intern ("delete-directory");
6433 Qdelete_file
= intern ("delete-file");
6434 Qrename_file
= intern ("rename-file");
6435 Qadd_name_to_file
= intern ("add-name-to-file");
6436 Qmake_symbolic_link
= intern ("make-symbolic-link");
6437 Qfile_exists_p
= intern ("file-exists-p");
6438 Qfile_executable_p
= intern ("file-executable-p");
6439 Qfile_readable_p
= intern ("file-readable-p");
6440 Qfile_writable_p
= intern ("file-writable-p");
6441 Qfile_symlink_p
= intern ("file-symlink-p");
6442 Qaccess_file
= intern ("access-file");
6443 Qfile_directory_p
= intern ("file-directory-p");
6444 Qfile_regular_p
= intern ("file-regular-p");
6445 Qfile_accessible_directory_p
= intern ("file-accessible-directory-p");
6446 Qfile_modes
= intern ("file-modes");
6447 Qset_file_modes
= intern ("set-file-modes");
6448 Qset_file_times
= intern ("set-file-times");
6449 Qfile_newer_than_file_p
= intern ("file-newer-than-file-p");
6450 Qinsert_file_contents
= intern ("insert-file-contents");
6451 Qwrite_region
= intern ("write-region");
6452 Qverify_visited_file_modtime
= intern ("verify-visited-file-modtime");
6453 Qset_visited_file_modtime
= intern ("set-visited-file-modtime");
6454 Qauto_save_coding
= intern ("auto-save-coding");
6456 staticpro (&Qexpand_file_name
);
6457 staticpro (&Qsubstitute_in_file_name
);
6458 staticpro (&Qdirectory_file_name
);
6459 staticpro (&Qfile_name_directory
);
6460 staticpro (&Qfile_name_nondirectory
);
6461 staticpro (&Qunhandled_file_name_directory
);
6462 staticpro (&Qfile_name_as_directory
);
6463 staticpro (&Qcopy_file
);
6464 staticpro (&Qmake_directory_internal
);
6465 staticpro (&Qmake_directory
);
6466 staticpro (&Qdelete_directory
);
6467 staticpro (&Qdelete_file
);
6468 staticpro (&Qrename_file
);
6469 staticpro (&Qadd_name_to_file
);
6470 staticpro (&Qmake_symbolic_link
);
6471 staticpro (&Qfile_exists_p
);
6472 staticpro (&Qfile_executable_p
);
6473 staticpro (&Qfile_readable_p
);
6474 staticpro (&Qfile_writable_p
);
6475 staticpro (&Qaccess_file
);
6476 staticpro (&Qfile_symlink_p
);
6477 staticpro (&Qfile_directory_p
);
6478 staticpro (&Qfile_regular_p
);
6479 staticpro (&Qfile_accessible_directory_p
);
6480 staticpro (&Qfile_modes
);
6481 staticpro (&Qset_file_modes
);
6482 staticpro (&Qset_file_times
);
6483 staticpro (&Qfile_newer_than_file_p
);
6484 staticpro (&Qinsert_file_contents
);
6485 staticpro (&Qwrite_region
);
6486 staticpro (&Qverify_visited_file_modtime
);
6487 staticpro (&Qset_visited_file_modtime
);
6488 staticpro (&Qauto_save_coding
);
6490 Qfile_name_history
= intern ("file-name-history");
6491 Fset (Qfile_name_history
, Qnil
);
6492 staticpro (&Qfile_name_history
);
6494 Qfile_error
= intern ("file-error");
6495 staticpro (&Qfile_error
);
6496 Qfile_already_exists
= intern ("file-already-exists");
6497 staticpro (&Qfile_already_exists
);
6498 Qfile_date_error
= intern ("file-date-error");
6499 staticpro (&Qfile_date_error
);
6500 Qexcl
= intern ("excl");
6504 Qfind_buffer_file_type
= intern ("find-buffer-file-type");
6505 staticpro (&Qfind_buffer_file_type
);
6508 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system
,
6509 doc
: /* *Coding system for encoding file names.
6510 If it is nil, `default-file-name-coding-system' (which see) is used. */);
6511 Vfile_name_coding_system
= Qnil
;
6513 DEFVAR_LISP ("default-file-name-coding-system",
6514 &Vdefault_file_name_coding_system
,
6515 doc
: /* Default coding system for encoding file names.
6516 This variable is used only when `file-name-coding-system' is nil.
6518 This variable is set/changed by the command `set-language-environment'.
6519 User should not set this variable manually,
6520 instead use `file-name-coding-system' to get a constant encoding
6521 of file names regardless of the current language environment. */);
6522 Vdefault_file_name_coding_system
= Qnil
;
6524 Qformat_decode
= intern ("format-decode");
6525 staticpro (&Qformat_decode
);
6526 Qformat_annotate_function
= intern ("format-annotate-function");
6527 staticpro (&Qformat_annotate_function
);
6528 Qafter_insert_file_set_coding
= intern ("after-insert-file-set-coding");
6529 staticpro (&Qafter_insert_file_set_coding
);
6531 Qcar_less_than_car
= intern ("car-less-than-car");
6532 staticpro (&Qcar_less_than_car
);
6534 Fput (Qfile_error
, Qerror_conditions
,
6535 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
)));
6536 Fput (Qfile_error
, Qerror_message
,
6537 build_string ("File error"));
6539 Fput (Qfile_already_exists
, Qerror_conditions
,
6540 Fcons (Qfile_already_exists
,
6541 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
))));
6542 Fput (Qfile_already_exists
, Qerror_message
,
6543 build_string ("File already exists"));
6545 Fput (Qfile_date_error
, Qerror_conditions
,
6546 Fcons (Qfile_date_error
,
6547 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
))));
6548 Fput (Qfile_date_error
, Qerror_message
,
6549 build_string ("Cannot set file date"));
6551 DEFVAR_LISP ("read-file-name-function", &Vread_file_name_function
,
6552 doc
: /* If this is non-nil, `read-file-name' does its work by calling this function. */);
6553 Vread_file_name_function
= Qnil
;
6555 DEFVAR_LISP ("read-file-name-predicate", &Vread_file_name_predicate
,
6556 doc
: /* Current predicate used by `read-file-name-internal'. */);
6557 Vread_file_name_predicate
= Qnil
;
6559 DEFVAR_BOOL ("read-file-name-completion-ignore-case", &read_file_name_completion_ignore_case
,
6560 doc
: /* *Non-nil means when reading a file name completion ignores case. */);
6561 #if defined VMS || defined DOS_NT || defined MAC_OS
6562 read_file_name_completion_ignore_case
= 1;
6564 read_file_name_completion_ignore_case
= 0;
6567 DEFVAR_BOOL ("insert-default-directory", &insert_default_directory
,
6568 doc
: /* *Non-nil means when reading a filename start with default dir in minibuffer.
6569 If the initial minibuffer contents are non-empty, you can usually
6570 request a default filename by typing RETURN without editing. For some
6571 commands, exiting with an empty minibuffer has a special meaning,
6572 such as making the current buffer visit no file in the case of
6573 `set-visited-file-name'.
6574 If this variable is non-nil, the minibuffer contents are always
6575 initially non-empty and typing RETURN without editing will fetch the
6576 default name, if one is provided. Note however that this default name
6577 is not necessarily the name originally inserted in the minibuffer, if
6578 that is just the default directory.
6579 If this variable is nil, the minibuffer often starts out empty. In
6580 that case you may have to explicitly fetch the next history element to
6581 request the default name. */);
6582 insert_default_directory
= 1;
6584 DEFVAR_BOOL ("vms-stmlf-recfm", &vms_stmlf_recfm
,
6585 doc
: /* *Non-nil means write new files with record format `stmlf'.
6586 nil means use format `var'. This variable is meaningful only on VMS. */);
6587 vms_stmlf_recfm
= 0;
6589 DEFVAR_LISP ("directory-sep-char", &Vdirectory_sep_char
,
6590 doc
: /* Directory separator character for built-in functions that return file names.
6591 The value is always ?/. Don't use this variable, just use `/'. */);
6593 DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist
,
6594 doc
: /* *Alist of elements (REGEXP . HANDLER) for file names handled specially.
6595 If a file name matches REGEXP, then all I/O on that file is done by calling
6598 The first argument given to HANDLER is the name of the I/O primitive
6599 to be handled; the remaining arguments are the arguments that were
6600 passed to that primitive. For example, if you do
6601 (file-exists-p FILENAME)
6602 and FILENAME is handled by HANDLER, then HANDLER is called like this:
6603 (funcall HANDLER 'file-exists-p FILENAME)
6604 The function `find-file-name-handler' checks this list for a handler
6605 for its argument. */);
6606 Vfile_name_handler_alist
= Qnil
;
6608 DEFVAR_LISP ("set-auto-coding-function",
6609 &Vset_auto_coding_function
,
6610 doc
: /* If non-nil, a function to call to decide a coding system of file.
6611 Two arguments are passed to this function: the file name
6612 and the length of a file contents following the point.
6613 This function should return a coding system to decode the file contents.
6614 It should check the file name against `auto-coding-alist'.
6615 If no coding system is decided, it should check a coding system
6616 specified in the heading lines with the format:
6617 -*- ... coding: CODING-SYSTEM; ... -*-
6618 or local variable spec of the tailing lines with `coding:' tag. */);
6619 Vset_auto_coding_function
= Qnil
;
6621 DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions
,
6622 doc
: /* A list of functions to be called at the end of `insert-file-contents'.
6623 Each is passed one argument, the number of characters inserted.
6624 It should return the new character count, and leave point the same.
6625 If `insert-file-contents' is intercepted by a handler from
6626 `file-name-handler-alist', that handler is responsible for calling the
6627 functions in `after-insert-file-functions' if appropriate. */);
6628 Vafter_insert_file_functions
= Qnil
;
6630 DEFVAR_LISP ("write-region-annotate-functions", &Vwrite_region_annotate_functions
,
6631 doc
: /* A list of functions to be called at the start of `write-region'.
6632 Each is passed two arguments, START and END as for `write-region'.
6633 These are usually two numbers but not always; see the documentation
6634 for `write-region'. The function should return a list of pairs
6635 of the form (POSITION . STRING), consisting of strings to be effectively
6636 inserted at the specified positions of the file being written (1 means to
6637 insert before the first byte written). The POSITIONs must be sorted into
6638 increasing order. If there are several functions in the list, the several
6639 lists are merged destructively. Alternatively, the function can return
6640 with a different buffer current; in that case it should pay attention
6641 to the annotations returned by previous functions and listed in
6642 `write-region-annotations-so-far'.*/);
6643 Vwrite_region_annotate_functions
= Qnil
;
6644 staticpro (&Qwrite_region_annotate_functions
);
6645 Qwrite_region_annotate_functions
6646 = intern ("write-region-annotate-functions");
6648 DEFVAR_LISP ("write-region-annotations-so-far",
6649 &Vwrite_region_annotations_so_far
,
6650 doc
: /* When an annotation function is called, this holds the previous annotations.
6651 These are the annotations made by other annotation functions
6652 that were already called. See also `write-region-annotate-functions'. */);
6653 Vwrite_region_annotations_so_far
= Qnil
;
6655 DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers
,
6656 doc
: /* A list of file name handlers that temporarily should not be used.
6657 This applies only to the operation `inhibit-file-name-operation'. */);
6658 Vinhibit_file_name_handlers
= Qnil
;
6660 DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation
,
6661 doc
: /* The operation for which `inhibit-file-name-handlers' is applicable. */);
6662 Vinhibit_file_name_operation
= Qnil
;
6664 DEFVAR_LISP ("auto-save-list-file-name", &Vauto_save_list_file_name
,
6665 doc
: /* File name in which we write a list of all auto save file names.
6666 This variable is initialized automatically from `auto-save-list-file-prefix'
6667 shortly after Emacs reads your `.emacs' file, if you have not yet given it
6668 a non-nil value. */);
6669 Vauto_save_list_file_name
= Qnil
;
6671 defsubr (&Sfind_file_name_handler
);
6672 defsubr (&Sfile_name_directory
);
6673 defsubr (&Sfile_name_nondirectory
);
6674 defsubr (&Sunhandled_file_name_directory
);
6675 defsubr (&Sfile_name_as_directory
);
6676 defsubr (&Sdirectory_file_name
);
6677 defsubr (&Smake_temp_name
);
6678 defsubr (&Sexpand_file_name
);
6679 defsubr (&Ssubstitute_in_file_name
);
6680 defsubr (&Scopy_file
);
6681 defsubr (&Smake_directory_internal
);
6682 defsubr (&Sdelete_directory
);
6683 defsubr (&Sdelete_file
);
6684 defsubr (&Srename_file
);
6685 defsubr (&Sadd_name_to_file
);
6687 defsubr (&Smake_symbolic_link
);
6688 #endif /* S_IFLNK */
6690 defsubr (&Sdefine_logical_name
);
6693 defsubr (&Ssysnetunam
);
6694 #endif /* HPUX_NET */
6695 defsubr (&Sfile_name_absolute_p
);
6696 defsubr (&Sfile_exists_p
);
6697 defsubr (&Sfile_executable_p
);
6698 defsubr (&Sfile_readable_p
);
6699 defsubr (&Sfile_writable_p
);
6700 defsubr (&Saccess_file
);
6701 defsubr (&Sfile_symlink_p
);
6702 defsubr (&Sfile_directory_p
);
6703 defsubr (&Sfile_accessible_directory_p
);
6704 defsubr (&Sfile_regular_p
);
6705 defsubr (&Sfile_modes
);
6706 defsubr (&Sset_file_modes
);
6707 defsubr (&Sset_file_times
);
6708 defsubr (&Sset_default_file_modes
);
6709 defsubr (&Sdefault_file_modes
);
6710 defsubr (&Sfile_newer_than_file_p
);
6711 defsubr (&Sinsert_file_contents
);
6712 defsubr (&Swrite_region
);
6713 defsubr (&Scar_less_than_car
);
6714 defsubr (&Sverify_visited_file_modtime
);
6715 defsubr (&Sclear_visited_file_modtime
);
6716 defsubr (&Svisited_file_modtime
);
6717 defsubr (&Sset_visited_file_modtime
);
6718 defsubr (&Sdo_auto_save
);
6719 defsubr (&Sset_buffer_auto_saved
);
6720 defsubr (&Sclear_buffer_auto_save_failure
);
6721 defsubr (&Srecent_auto_save_p
);
6723 defsubr (&Sread_file_name_internal
);
6724 defsubr (&Sread_file_name
);
6725 defsubr (&Snext_read_file_uses_dialog_p
);
6728 defsubr (&Sunix_sync
);
6732 /* arch-tag: 64ba3fd7-f844-4fb2-ba4b-427eb928786c
6733 (do not change this comment) */