1 /* File IO for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1996,
3 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 2005, 2006 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
30 #include <sys/types.h>
37 #if !defined (S_ISLNK) && defined (S_IFLNK)
38 # define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
41 #if !defined (S_ISFIFO) && defined (S_IFIFO)
42 # define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
45 #if !defined (S_ISREG) && defined (S_IFREG)
46 # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
75 #include "intervals.h"
81 #include "dispextern.h"
88 #endif /* not WINDOWSNT */
92 #include <sys/param.h>
100 #define CORRECT_DIR_SEPS(s) \
101 do { if ('/' == DIRECTORY_SEP) dostounix_filename (s); \
102 else unixtodos_filename (s); \
104 /* On Windows, drive letters must be alphabetic - on DOS, the Netware
105 redirector allows the six letters between 'Z' and 'a' as well. */
107 #define IS_DRIVE(x) ((x) >= 'A' && (x) <= 'z')
110 #define IS_DRIVE(x) isalpha (x)
112 /* Need to lower-case the drive letter, or else expanded
113 filenames will sometimes compare inequal, because
114 `expand-file-name' doesn't always down-case the drive letter. */
115 #define DRIVE_LETTER(x) (tolower (x))
136 #include "commands.h"
137 extern int use_dialog_box
;
138 extern int use_file_dialog
;
152 #ifndef FILE_SYSTEM_CASE
153 #define FILE_SYSTEM_CASE(filename) (filename)
156 /* Nonzero during writing of auto-save files */
159 /* Set by auto_save_1 to mode of original file so Fwrite_region will create
160 a new file with the same mode as the original */
161 int auto_save_mode_bits
;
163 /* The symbol bound to coding-system-for-read when
164 insert-file-contents is called for recovering a file. This is not
165 an actual coding system name, but just an indicator to tell
166 insert-file-contents to use `emacs-mule' with a special flag for
167 auto saving and recovering a file. */
168 Lisp_Object Qauto_save_coding
;
170 /* Coding system for file names, or nil if none. */
171 Lisp_Object Vfile_name_coding_system
;
173 /* Coding system for file names used only when
174 Vfile_name_coding_system is nil. */
175 Lisp_Object Vdefault_file_name_coding_system
;
177 /* Alist of elements (REGEXP . HANDLER) for file names
178 whose I/O is done with a special handler. */
179 Lisp_Object Vfile_name_handler_alist
;
181 /* Property name of a file name handler,
182 which gives a list of operations it handles.. */
183 Lisp_Object Qoperations
;
185 /* Lisp functions for translating file formats */
186 Lisp_Object Qformat_decode
, Qformat_annotate_function
;
188 /* Function to be called to decide a coding system of a reading file. */
189 Lisp_Object Vset_auto_coding_function
;
191 /* Functions to be called to process text properties in inserted file. */
192 Lisp_Object Vafter_insert_file_functions
;
194 /* Lisp function for setting buffer-file-coding-system and the
195 multibyteness of the current buffer after inserting a file. */
196 Lisp_Object Qafter_insert_file_set_coding
;
198 /* Functions to be called to create text property annotations for file. */
199 Lisp_Object Vwrite_region_annotate_functions
;
200 Lisp_Object Qwrite_region_annotate_functions
;
202 /* During build_annotations, each time an annotation function is called,
203 this holds the annotations made by the previous functions. */
204 Lisp_Object Vwrite_region_annotations_so_far
;
206 /* File name in which we write a list of all our auto save files. */
207 Lisp_Object Vauto_save_list_file_name
;
209 /* Function to call to read a file name. */
210 Lisp_Object Vread_file_name_function
;
212 /* Current predicate used by read_file_name_internal. */
213 Lisp_Object Vread_file_name_predicate
;
215 /* Nonzero means completion ignores case when reading file name. */
216 int read_file_name_completion_ignore_case
;
218 /* Nonzero means, when reading a filename in the minibuffer,
219 start out by inserting the default directory into the minibuffer. */
220 int insert_default_directory
;
222 /* On VMS, nonzero means write new files with record format stmlf.
223 Zero means use var format. */
226 /* On NT, specifies the directory separator character, used (eg.) when
227 expanding file names. This can be bound to / or \. */
228 Lisp_Object Vdirectory_sep_char
;
231 /* Nonzero means skip the call to fsync in Fwrite-region. */
232 int write_region_inhibit_fsync
;
235 extern Lisp_Object Vuser_login_name
;
238 extern Lisp_Object Vw32_get_true_file_attributes
;
241 extern int minibuf_level
;
243 extern int minibuffer_auto_raise
;
245 extern int history_delete_duplicates
;
247 /* These variables describe handlers that have "already" had a chance
248 to handle the current operation.
250 Vinhibit_file_name_handlers is a list of file name handlers.
251 Vinhibit_file_name_operation is the operation being handled.
252 If we try to handle that operation, we ignore those handlers. */
254 static Lisp_Object Vinhibit_file_name_handlers
;
255 static Lisp_Object Vinhibit_file_name_operation
;
257 Lisp_Object Qfile_error
, Qfile_already_exists
, Qfile_date_error
;
259 Lisp_Object Qfile_name_history
;
261 Lisp_Object Qcar_less_than_car
;
263 static int a_write
P_ ((int, Lisp_Object
, int, int,
264 Lisp_Object
*, struct coding_system
*));
265 static int e_write
P_ ((int, Lisp_Object
, int, int, struct coding_system
*));
269 report_file_error (string
, data
)
273 Lisp_Object errstring
;
276 synchronize_system_messages_locale ();
277 errstring
= code_convert_string_norecord (build_string (strerror (errorno
)),
278 Vlocale_coding_system
, 0);
284 Fsignal (Qfile_already_exists
, Fcons (errstring
, data
));
287 /* System error messages are capitalized. Downcase the initial
288 unless it is followed by a slash. */
289 if (SREF (errstring
, 1) != '/')
290 SSET (errstring
, 0, DOWNCASE (SREF (errstring
, 0)));
292 Fsignal (Qfile_error
,
293 Fcons (build_string (string
), Fcons (errstring
, data
)));
298 close_file_unwind (fd
)
301 emacs_close (XFASTINT (fd
));
305 /* Restore point, having saved it as a marker. */
308 restore_point_unwind (location
)
309 Lisp_Object location
;
311 Fgoto_char (location
);
312 Fset_marker (location
, Qnil
, Qnil
);
316 Lisp_Object Qexpand_file_name
;
317 Lisp_Object Qsubstitute_in_file_name
;
318 Lisp_Object Qdirectory_file_name
;
319 Lisp_Object Qfile_name_directory
;
320 Lisp_Object Qfile_name_nondirectory
;
321 Lisp_Object Qunhandled_file_name_directory
;
322 Lisp_Object Qfile_name_as_directory
;
323 Lisp_Object Qcopy_file
;
324 Lisp_Object Qmake_directory_internal
;
325 Lisp_Object Qmake_directory
;
326 Lisp_Object Qdelete_directory
;
327 Lisp_Object Qdelete_file
;
328 Lisp_Object Qrename_file
;
329 Lisp_Object Qadd_name_to_file
;
330 Lisp_Object Qmake_symbolic_link
;
331 Lisp_Object Qfile_exists_p
;
332 Lisp_Object Qfile_executable_p
;
333 Lisp_Object Qfile_readable_p
;
334 Lisp_Object Qfile_writable_p
;
335 Lisp_Object Qfile_symlink_p
;
336 Lisp_Object Qaccess_file
;
337 Lisp_Object Qfile_directory_p
;
338 Lisp_Object Qfile_regular_p
;
339 Lisp_Object Qfile_accessible_directory_p
;
340 Lisp_Object Qfile_modes
;
341 Lisp_Object Qset_file_modes
;
342 Lisp_Object Qset_file_times
;
343 Lisp_Object Qfile_newer_than_file_p
;
344 Lisp_Object Qinsert_file_contents
;
345 Lisp_Object Qwrite_region
;
346 Lisp_Object Qverify_visited_file_modtime
;
347 Lisp_Object Qset_visited_file_modtime
;
349 DEFUN ("find-file-name-handler", Ffind_file_name_handler
, Sfind_file_name_handler
, 2, 2, 0,
350 doc
: /* Return FILENAME's handler function for OPERATION, if it has one.
351 Otherwise, return nil.
352 A file name is handled if one of the regular expressions in
353 `file-name-handler-alist' matches it.
355 If OPERATION equals `inhibit-file-name-operation', then we ignore
356 any handlers that are members of `inhibit-file-name-handlers',
357 but we still do run any other handlers. This lets handlers
358 use the standard functions without calling themselves recursively. */)
359 (filename
, operation
)
360 Lisp_Object filename
, operation
;
362 /* This function must not munge the match data. */
363 Lisp_Object chain
, inhibited_handlers
, result
;
367 CHECK_STRING (filename
);
369 if (EQ (operation
, Vinhibit_file_name_operation
))
370 inhibited_handlers
= Vinhibit_file_name_handlers
;
372 inhibited_handlers
= Qnil
;
374 for (chain
= Vfile_name_handler_alist
; CONSP (chain
);
375 chain
= XCDR (chain
))
381 Lisp_Object string
= XCAR (elt
);
383 Lisp_Object handler
= XCDR (elt
);
384 Lisp_Object operations
= Qnil
;
386 if (SYMBOLP (handler
))
387 operations
= Fget (handler
, Qoperations
);
390 && (match_pos
= fast_string_match (string
, filename
)) > pos
391 && (NILP (operations
) || ! NILP (Fmemq (operation
, operations
))))
395 handler
= XCDR (elt
);
396 tem
= Fmemq (handler
, inhibited_handlers
);
410 DEFUN ("file-name-directory", Ffile_name_directory
, Sfile_name_directory
,
412 doc
: /* Return the directory component in file name FILENAME.
413 Return nil if FILENAME does not include a directory.
414 Otherwise return a directory spec.
415 Given a Unix syntax file name, returns a string ending in slash;
416 on VMS, perhaps instead a string ending in `:', `]' or `>'. */)
418 Lisp_Object filename
;
421 register const unsigned char *beg
;
423 register unsigned char *beg
;
425 register const unsigned char *p
;
428 CHECK_STRING (filename
);
430 /* If the file name has special constructs in it,
431 call the corresponding file handler. */
432 handler
= Ffind_file_name_handler (filename
, Qfile_name_directory
);
434 return call2 (handler
, Qfile_name_directory
, filename
);
436 filename
= FILE_SYSTEM_CASE (filename
);
437 beg
= SDATA (filename
);
439 beg
= strcpy (alloca (strlen (beg
) + 1), beg
);
441 p
= beg
+ SBYTES (filename
);
443 while (p
!= beg
&& !IS_DIRECTORY_SEP (p
[-1])
445 && p
[-1] != ':' && p
[-1] != ']' && p
[-1] != '>'
448 /* only recognise drive specifier at the beginning */
450 /* handle the "/:d:foo" and "/:foo" cases correctly */
451 && ((p
== beg
+ 2 && !IS_DIRECTORY_SEP (*beg
))
452 || (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
))))
459 /* Expansion of "c:" to drive and default directory. */
462 /* MAXPATHLEN+1 is guaranteed to be enough space for getdefdir. */
463 unsigned char *res
= alloca (MAXPATHLEN
+ 1);
464 unsigned char *r
= res
;
466 if (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
) && beg
[1] == ':')
468 strncpy (res
, beg
, 2);
473 if (getdefdir (toupper (*beg
) - 'A' + 1, r
))
475 if (!IS_DIRECTORY_SEP (res
[strlen (res
) - 1]))
478 p
= beg
+ strlen (beg
);
481 CORRECT_DIR_SEPS (beg
);
484 return make_specified_string (beg
, -1, p
- beg
, STRING_MULTIBYTE (filename
));
487 DEFUN ("file-name-nondirectory", Ffile_name_nondirectory
,
488 Sfile_name_nondirectory
, 1, 1, 0,
489 doc
: /* Return file name FILENAME sans its directory.
490 For example, in a Unix-syntax file name,
491 this is everything after the last slash,
492 or the entire name if it contains no slash. */)
494 Lisp_Object filename
;
496 register const unsigned char *beg
, *p
, *end
;
499 CHECK_STRING (filename
);
501 /* If the file name has special constructs in it,
502 call the corresponding file handler. */
503 handler
= Ffind_file_name_handler (filename
, Qfile_name_nondirectory
);
505 return call2 (handler
, Qfile_name_nondirectory
, filename
);
507 beg
= SDATA (filename
);
508 end
= p
= beg
+ SBYTES (filename
);
510 while (p
!= beg
&& !IS_DIRECTORY_SEP (p
[-1])
512 && p
[-1] != ':' && p
[-1] != ']' && p
[-1] != '>'
515 /* only recognise drive specifier at beginning */
517 /* handle the "/:d:foo" case correctly */
518 && (p
== beg
+ 2 || (p
== beg
+ 4 && IS_DIRECTORY_SEP (*beg
))))
523 return make_specified_string (p
, -1, end
- p
, STRING_MULTIBYTE (filename
));
526 DEFUN ("unhandled-file-name-directory", Funhandled_file_name_directory
,
527 Sunhandled_file_name_directory
, 1, 1, 0,
528 doc
: /* Return a directly usable directory name somehow associated with FILENAME.
529 A `directly usable' directory name is one that may be used without the
530 intervention of any file handler.
531 If FILENAME is a directly usable file itself, return
532 \(file-name-directory FILENAME).
533 The `call-process' and `start-process' functions use this function to
534 get a current directory to run processes in. */)
536 Lisp_Object filename
;
540 /* If the file name has special constructs in it,
541 call the corresponding file handler. */
542 handler
= Ffind_file_name_handler (filename
, Qunhandled_file_name_directory
);
544 return call2 (handler
, Qunhandled_file_name_directory
, filename
);
546 return Ffile_name_directory (filename
);
551 file_name_as_directory (out
, in
)
554 int size
= strlen (in
) - 1;
567 /* Is it already a directory string? */
568 if (in
[size
] == ':' || in
[size
] == ']' || in
[size
] == '>')
570 /* Is it a VMS directory file name? If so, hack VMS syntax. */
571 else if (! index (in
, '/')
572 && ((size
> 3 && ! strcmp (&in
[size
- 3], ".DIR"))
573 || (size
> 3 && ! strcmp (&in
[size
- 3], ".dir"))
574 || (size
> 5 && (! strncmp (&in
[size
- 5], ".DIR", 4)
575 || ! strncmp (&in
[size
- 5], ".dir", 4))
576 && (in
[size
- 1] == '.' || in
[size
- 1] == ';')
577 && in
[size
] == '1')))
579 register char *p
, *dot
;
583 dir:x.dir --> dir:[x]
584 dir:[x]y.dir --> dir:[x.y] */
586 while (p
!= in
&& *p
!= ':' && *p
!= '>' && *p
!= ']') p
--;
589 strncpy (out
, in
, p
- in
);
608 dot
= index (p
, '.');
611 /* blindly remove any extension */
612 size
= strlen (out
) + (dot
- p
);
613 strncat (out
, p
, dot
- p
);
624 /* For Unix syntax, Append a slash if necessary */
625 if (!IS_DIRECTORY_SEP (out
[size
]))
627 /* Cannot use DIRECTORY_SEP, which could have any value */
629 out
[size
+ 2] = '\0';
632 CORRECT_DIR_SEPS (out
);
638 DEFUN ("file-name-as-directory", Ffile_name_as_directory
,
639 Sfile_name_as_directory
, 1, 1, 0,
640 doc
: /* Return a string representing the file name FILE interpreted as a directory.
641 This operation exists because a directory is also a file, but its name as
642 a directory is different from its name as a file.
643 The result can be used as the value of `default-directory'
644 or passed as second argument to `expand-file-name'.
645 For a Unix-syntax file name, just appends a slash.
646 On VMS, converts \"[X]FOO.DIR\" to \"[X.FOO]\", etc. */)
657 /* If the file name has special constructs in it,
658 call the corresponding file handler. */
659 handler
= Ffind_file_name_handler (file
, Qfile_name_as_directory
);
661 return call2 (handler
, Qfile_name_as_directory
, file
);
663 buf
= (char *) alloca (SBYTES (file
) + 10);
664 file_name_as_directory (buf
, SDATA (file
));
665 return make_specified_string (buf
, -1, strlen (buf
),
666 STRING_MULTIBYTE (file
));
670 * Convert from directory name to filename.
672 * xyzzy:[mukesh.emacs] => xyzzy:[mukesh]emacs.dir.1
673 * xyzzy:[mukesh] => xyzzy:[000000]mukesh.dir.1
674 * On UNIX, it's simple: just make sure there isn't a terminating /
676 * Value is nonzero if the string output is different from the input.
680 directory_file_name (src
, dst
)
688 struct FAB fab
= cc$rms_fab
;
689 struct NAM nam
= cc$rms_nam
;
690 char esa
[NAM$C_MAXRSS
];
695 if (! index (src
, '/')
696 && (src
[slen
- 1] == ']'
697 || src
[slen
- 1] == ':'
698 || src
[slen
- 1] == '>'))
700 /* VMS style - convert [x.y.z] to [x.y]z, [x] to [000000]x */
702 fab
.fab$b_fns
= slen
;
703 fab
.fab$l_nam
= &nam
;
704 fab
.fab$l_fop
= FAB$M_NAM
;
707 nam
.nam$b_ess
= sizeof esa
;
708 nam
.nam$b_nop
|= NAM$M_SYNCHK
;
710 /* We call SYS$PARSE to handle such things as [--] for us. */
711 if (SYS$
PARSE (&fab
, 0, 0) == RMS$_NORMAL
)
713 slen
= nam
.nam$b_esl
;
714 if (esa
[slen
- 1] == ';' && esa
[slen
- 2] == '.')
719 if (src
[slen
- 1] != ']' && src
[slen
- 1] != '>')
721 /* what about when we have logical_name:???? */
722 if (src
[slen
- 1] == ':')
723 { /* Xlate logical name and see what we get */
724 ptr
= strcpy (dst
, src
); /* upper case for getenv */
727 if ('a' <= *ptr
&& *ptr
<= 'z')
731 dst
[slen
- 1] = 0; /* remove colon */
732 if (!(src
= egetenv (dst
)))
734 /* should we jump to the beginning of this procedure?
735 Good points: allows us to use logical names that xlate
737 Bad points: can be a problem if we just translated to a device
739 For now, I'll punt and always expect VMS names, and hope for
742 if (src
[slen
- 1] != ']' && src
[slen
- 1] != '>')
743 { /* no recursion here! */
749 { /* not a directory spec */
754 bracket
= src
[slen
- 1];
756 /* If bracket is ']' or '>', bracket - 2 is the corresponding
758 ptr
= index (src
, bracket
- 2);
760 { /* no opening bracket */
764 if (!(rptr
= rindex (src
, '.')))
767 strncpy (dst
, src
, slen
);
771 dst
[slen
++] = bracket
;
776 /* If we have the top-level of a rooted directory (i.e. xx:[000000]),
777 then translate the device and recurse. */
778 if (dst
[slen
- 1] == ':'
779 && dst
[slen
- 2] != ':' /* skip decnet nodes */
780 && strcmp (src
+ slen
, "[000000]") == 0)
782 dst
[slen
- 1] = '\0';
783 if ((ptr
= egetenv (dst
))
784 && (rlen
= strlen (ptr
) - 1) > 0
785 && (ptr
[rlen
] == ']' || ptr
[rlen
] == '>')
786 && ptr
[rlen
- 1] == '.')
788 char * buf
= (char *) alloca (strlen (ptr
) + 1);
792 return directory_file_name (buf
, dst
);
797 strcat (dst
, "[000000]");
801 rlen
= strlen (rptr
) - 1;
802 strncat (dst
, rptr
, rlen
);
803 dst
[slen
+ rlen
] = '\0';
804 strcat (dst
, ".DIR.1");
808 /* Process as Unix format: just remove any final slash.
809 But leave "/" unchanged; do not change it to "". */
812 /* Handle // as root for apollo's. */
813 if ((slen
> 2 && dst
[slen
- 1] == '/')
814 || (slen
> 1 && dst
[0] != '/' && dst
[slen
- 1] == '/'))
818 && IS_DIRECTORY_SEP (dst
[slen
- 1])
820 && !IS_ANY_SEP (dst
[slen
- 2])
826 CORRECT_DIR_SEPS (dst
);
831 DEFUN ("directory-file-name", Fdirectory_file_name
, Sdirectory_file_name
,
833 doc
: /* Returns the file name of the directory named DIRECTORY.
834 This is the name of the file that holds the data for the directory DIRECTORY.
835 This operation exists because a directory is also a file, but its name as
836 a directory is different from its name as a file.
837 In Unix-syntax, this function just removes the final slash.
838 On VMS, given a VMS-syntax directory name such as \"[X.Y]\",
839 it returns a file name such as \"[X]Y.DIR.1\". */)
841 Lisp_Object directory
;
846 CHECK_STRING (directory
);
848 if (NILP (directory
))
851 /* If the file name has special constructs in it,
852 call the corresponding file handler. */
853 handler
= Ffind_file_name_handler (directory
, Qdirectory_file_name
);
855 return call2 (handler
, Qdirectory_file_name
, directory
);
858 /* 20 extra chars is insufficient for VMS, since we might perform a
859 logical name translation. an equivalence string can be up to 255
860 chars long, so grab that much extra space... - sss */
861 buf
= (char *) alloca (SBYTES (directory
) + 20 + 255);
863 buf
= (char *) alloca (SBYTES (directory
) + 20);
865 directory_file_name (SDATA (directory
), buf
);
866 return make_specified_string (buf
, -1, strlen (buf
),
867 STRING_MULTIBYTE (directory
));
870 static char make_temp_name_tbl
[64] =
872 'A','B','C','D','E','F','G','H',
873 'I','J','K','L','M','N','O','P',
874 'Q','R','S','T','U','V','W','X',
875 'Y','Z','a','b','c','d','e','f',
876 'g','h','i','j','k','l','m','n',
877 'o','p','q','r','s','t','u','v',
878 'w','x','y','z','0','1','2','3',
879 '4','5','6','7','8','9','-','_'
882 static unsigned make_temp_name_count
, make_temp_name_count_initialized_p
;
884 /* Value is a temporary file name starting with PREFIX, a string.
886 The Emacs process number forms part of the result, so there is
887 no danger of generating a name being used by another process.
888 In addition, this function makes an attempt to choose a name
889 which has no existing file. To make this work, PREFIX should be
890 an absolute file name.
892 BASE64_P non-zero means add the pid as 3 characters in base64
893 encoding. In this case, 6 characters will be added to PREFIX to
894 form the file name. Otherwise, if Emacs is running on a system
895 with long file names, add the pid as a decimal number.
897 This function signals an error if no unique file name could be
901 make_temp_name (prefix
, base64_p
)
908 unsigned char *p
, *data
;
912 CHECK_STRING (prefix
);
914 /* VAL is created by adding 6 characters to PREFIX. The first
915 three are the PID of this process, in base 64, and the second
916 three are incremented if the file already exists. This ensures
917 262144 unique file names per PID per PREFIX. */
919 pid
= (int) getpid ();
923 pidbuf
[0] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
924 pidbuf
[1] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
925 pidbuf
[2] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
930 #ifdef HAVE_LONG_FILE_NAMES
931 sprintf (pidbuf
, "%d", pid
);
932 pidlen
= strlen (pidbuf
);
934 pidbuf
[0] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
935 pidbuf
[1] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
936 pidbuf
[2] = make_temp_name_tbl
[pid
& 63], pid
>>= 6;
941 len
= SBYTES (prefix
); clen
= SCHARS (prefix
);
942 val
= make_uninit_multibyte_string (clen
+ 3 + pidlen
, len
+ 3 + pidlen
);
943 if (!STRING_MULTIBYTE (prefix
))
944 STRING_SET_UNIBYTE (val
);
946 bcopy(SDATA (prefix
), data
, len
);
949 bcopy (pidbuf
, p
, pidlen
);
952 /* Here we try to minimize useless stat'ing when this function is
953 invoked many times successively with the same PREFIX. We achieve
954 this by initializing count to a random value, and incrementing it
957 We don't want make-temp-name to be called while dumping,
958 because then make_temp_name_count_initialized_p would get set
959 and then make_temp_name_count would not be set when Emacs starts. */
961 if (!make_temp_name_count_initialized_p
)
963 make_temp_name_count
= (unsigned) time (NULL
);
964 make_temp_name_count_initialized_p
= 1;
970 unsigned num
= make_temp_name_count
;
972 p
[0] = make_temp_name_tbl
[num
& 63], num
>>= 6;
973 p
[1] = make_temp_name_tbl
[num
& 63], num
>>= 6;
974 p
[2] = make_temp_name_tbl
[num
& 63], num
>>= 6;
976 /* Poor man's congruential RN generator. Replace with
977 ++make_temp_name_count for debugging. */
978 make_temp_name_count
+= 25229;
979 make_temp_name_count
%= 225307;
981 if (stat (data
, &ignored
) < 0)
983 /* We want to return only if errno is ENOENT. */
987 /* The error here is dubious, but there is little else we
988 can do. The alternatives are to return nil, which is
989 as bad as (and in many cases worse than) throwing the
990 error, or to ignore the error, which will likely result
991 in looping through 225307 stat's, which is not only
992 dog-slow, but also useless since it will fallback to
993 the errow below, anyway. */
994 report_file_error ("Cannot create temporary name for prefix",
995 Fcons (prefix
, Qnil
));
1000 error ("Cannot create temporary name for prefix `%s'",
1006 DEFUN ("make-temp-name", Fmake_temp_name
, Smake_temp_name
, 1, 1, 0,
1007 doc
: /* Generate temporary file name (string) starting with PREFIX (a string).
1008 The Emacs process number forms part of the result,
1009 so there is no danger of generating a name being used by another process.
1011 In addition, this function makes an attempt to choose a name
1012 which has no existing file. To make this work,
1013 PREFIX should be an absolute file name.
1015 There is a race condition between calling `make-temp-name' and creating the
1016 file which opens all kinds of security holes. For that reason, you should
1017 probably use `make-temp-file' instead, except in three circumstances:
1019 * If you are creating the file in the user's home directory.
1020 * If you are creating a directory rather than an ordinary file.
1021 * If you are taking special precautions as `make-temp-file' does. */)
1025 return make_temp_name (prefix
, 0);
1030 DEFUN ("expand-file-name", Fexpand_file_name
, Sexpand_file_name
, 1, 2, 0,
1031 doc
: /* Convert filename NAME to absolute, and canonicalize it.
1032 Second arg DEFAULT-DIRECTORY is directory to start with if NAME is relative
1033 \(does not start with slash); if DEFAULT-DIRECTORY is nil or missing,
1034 the current buffer's value of `default-directory' is used.
1035 File name components that are `.' are removed, and
1036 so are file name components followed by `..', along with the `..' itself;
1037 note that these simplifications are done without checking the resulting
1038 file names in the file system.
1039 An initial `~/' expands to your home directory.
1040 An initial `~USER/' expands to USER's home directory.
1041 See also the function `substitute-in-file-name'. */)
1042 (name
, default_directory
)
1043 Lisp_Object name
, default_directory
;
1047 register unsigned char *newdir
, *p
, *o
;
1049 unsigned char *target
;
1052 unsigned char * colon
= 0;
1053 unsigned char * close
= 0;
1054 unsigned char * slash
= 0;
1055 unsigned char * brack
= 0;
1056 int lbrack
= 0, rbrack
= 0;
1061 int collapse_newdir
= 1;
1065 Lisp_Object handler
, result
;
1068 CHECK_STRING (name
);
1070 /* If the file name has special constructs in it,
1071 call the corresponding file handler. */
1072 handler
= Ffind_file_name_handler (name
, Qexpand_file_name
);
1073 if (!NILP (handler
))
1074 return call3 (handler
, Qexpand_file_name
, name
, default_directory
);
1076 /* Use the buffer's default-directory if DEFAULT_DIRECTORY is omitted. */
1077 if (NILP (default_directory
))
1078 default_directory
= current_buffer
->directory
;
1079 if (! STRINGP (default_directory
))
1082 /* "/" is not considered a root directory on DOS_NT, so using "/"
1083 here causes an infinite recursion in, e.g., the following:
1085 (let (default-directory)
1086 (expand-file-name "a"))
1088 To avoid this, we set default_directory to the root of the
1090 extern char *emacs_root_dir (void);
1092 default_directory
= build_string (emacs_root_dir ());
1094 default_directory
= build_string ("/");
1098 if (!NILP (default_directory
))
1100 handler
= Ffind_file_name_handler (default_directory
, Qexpand_file_name
);
1101 if (!NILP (handler
))
1102 return call3 (handler
, Qexpand_file_name
, name
, default_directory
);
1105 o
= SDATA (default_directory
);
1107 /* Make sure DEFAULT_DIRECTORY is properly expanded.
1108 It would be better to do this down below where we actually use
1109 default_directory. Unfortunately, calling Fexpand_file_name recursively
1110 could invoke GC, and the strings might be relocated. This would
1111 be annoying because we have pointers into strings lying around
1112 that would need adjusting, and people would add new pointers to
1113 the code and forget to adjust them, resulting in intermittent bugs.
1114 Putting this call here avoids all that crud.
1116 The EQ test avoids infinite recursion. */
1117 if (! NILP (default_directory
) && !EQ (default_directory
, name
)
1118 /* Save time in some common cases - as long as default_directory
1119 is not relative, it can be canonicalized with name below (if it
1120 is needed at all) without requiring it to be expanded now. */
1122 /* Detect MSDOS file names with drive specifiers. */
1123 && ! (IS_DRIVE (o
[0]) && IS_DEVICE_SEP (o
[1]) && IS_DIRECTORY_SEP (o
[2]))
1125 /* Detect Windows file names in UNC format. */
1126 && ! (IS_DIRECTORY_SEP (o
[0]) && IS_DIRECTORY_SEP (o
[1]))
1128 #else /* not DOS_NT */
1129 /* Detect Unix absolute file names (/... alone is not absolute on
1131 && ! (IS_DIRECTORY_SEP (o
[0]))
1132 #endif /* not DOS_NT */
1135 struct gcpro gcpro1
;
1138 default_directory
= Fexpand_file_name (default_directory
, Qnil
);
1142 name
= FILE_SYSTEM_CASE (name
);
1144 multibyte
= STRING_MULTIBYTE (name
);
1147 /* We will force directory separators to be either all \ or /, so make
1148 a local copy to modify, even if there ends up being no change. */
1149 nm
= strcpy (alloca (strlen (nm
) + 1), nm
);
1151 /* Note if special escape prefix is present, but remove for now. */
1152 if (nm
[0] == '/' && nm
[1] == ':')
1158 /* Find and remove drive specifier if present; this makes nm absolute
1159 even if the rest of the name appears to be relative. Only look for
1160 drive specifier at the beginning. */
1161 if (IS_DRIVE (nm
[0]) && IS_DEVICE_SEP (nm
[1]))
1168 /* If we see "c://somedir", we want to strip the first slash after the
1169 colon when stripping the drive letter. Otherwise, this expands to
1171 if (drive
&& IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1173 #endif /* WINDOWSNT */
1177 /* Discard any previous drive specifier if nm is now in UNC format. */
1178 if (IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1184 /* If nm is absolute, look for `/./' or `/../' or `//''sequences; if
1185 none are found, we can probably return right away. We will avoid
1186 allocating a new string if name is already fully expanded. */
1188 IS_DIRECTORY_SEP (nm
[0])
1190 && drive
&& !is_escaped
1193 && (drive
|| IS_DIRECTORY_SEP (nm
[1])) && !is_escaped
1200 /* If it turns out that the filename we want to return is just a
1201 suffix of FILENAME, we don't need to go through and edit
1202 things; we just need to construct a new string using data
1203 starting at the middle of FILENAME. If we set lose to a
1204 non-zero value, that means we've discovered that we can't do
1211 /* Since we know the name is absolute, we can assume that each
1212 element starts with a "/". */
1214 /* "." and ".." are hairy. */
1215 if (IS_DIRECTORY_SEP (p
[0])
1217 && (IS_DIRECTORY_SEP (p
[2])
1219 || (p
[2] == '.' && (IS_DIRECTORY_SEP (p
[3])
1222 /* We want to replace multiple `/' in a row with a single
1225 && IS_DIRECTORY_SEP (p
[0])
1226 && IS_DIRECTORY_SEP (p
[1]))
1233 /* if dev:[dir]/, move nm to / */
1234 if (!slash
&& p
> nm
&& (brack
|| colon
)) {
1235 nm
= (brack
? brack
+ 1 : colon
+ 1);
1236 lbrack
= rbrack
= 0;
1243 #ifdef NO_HYPHENS_IN_FILENAMES
1244 if (lbrack
== rbrack
)
1246 /* Avoid clobbering negative version numbers. */
1251 #endif /* NO_HYPHENS_IN_FILENAMES */
1252 if (lbrack
> rbrack
&&
1253 ((p
[-1] == '.' || p
[-1] == '[' || p
[-1] == '<') &&
1254 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>')))
1256 #ifdef NO_HYPHENS_IN_FILENAMES
1259 #endif /* NO_HYPHENS_IN_FILENAMES */
1260 /* count open brackets, reset close bracket pointer */
1261 if (p
[0] == '[' || p
[0] == '<')
1262 lbrack
++, brack
= 0;
1263 /* count close brackets, set close bracket pointer */
1264 if (p
[0] == ']' || p
[0] == '>')
1265 rbrack
++, brack
= p
;
1266 /* detect ][ or >< */
1267 if ((p
[0] == ']' || p
[0] == '>') && (p
[1] == '[' || p
[1] == '<'))
1269 if ((p
[0] == ':' || p
[0] == ']' || p
[0] == '>') && p
[1] == '~')
1270 nm
= p
+ 1, lose
= 1;
1271 if (p
[0] == ':' && (colon
|| slash
))
1272 /* if dev1:[dir]dev2:, move nm to dev2: */
1278 /* if /name/dev:, move nm to dev: */
1281 /* if node::dev:, move colon following dev */
1282 else if (colon
&& colon
[-1] == ':')
1284 /* if dev1:dev2:, move nm to dev2: */
1285 else if (colon
&& colon
[-1] != ':')
1290 if (p
[0] == ':' && !colon
)
1296 if (lbrack
== rbrack
)
1299 else if (p
[0] == '.')
1307 if (index (nm
, '/'))
1309 nm
= sys_translate_unix (nm
);
1310 return make_specified_string (nm
, -1, strlen (nm
), multibyte
);
1314 /* Make sure directories are all separated with / or \ as
1315 desired, but avoid allocation of a new string when not
1317 CORRECT_DIR_SEPS (nm
);
1319 if (IS_DIRECTORY_SEP (nm
[1]))
1321 if (strcmp (nm
, SDATA (name
)) != 0)
1322 name
= make_specified_string (nm
, -1, strlen (nm
), multibyte
);
1326 /* drive must be set, so this is okay */
1327 if (strcmp (nm
- 2, SDATA (name
)) != 0)
1331 name
= make_specified_string (nm
, -1, p
- nm
, multibyte
);
1332 temp
[0] = DRIVE_LETTER (drive
);
1333 name
= concat2 (build_string (temp
), name
);
1336 #else /* not DOS_NT */
1337 if (nm
== SDATA (name
))
1339 return make_specified_string (nm
, -1, strlen (nm
), multibyte
);
1340 #endif /* not DOS_NT */
1344 /* At this point, nm might or might not be an absolute file name. We
1345 need to expand ~ or ~user if present, otherwise prefix nm with
1346 default_directory if nm is not absolute, and finally collapse /./
1347 and /foo/../ sequences.
1349 We set newdir to be the appropriate prefix if one is needed:
1350 - the relevant user directory if nm starts with ~ or ~user
1351 - the specified drive's working dir (DOS/NT only) if nm does not
1353 - the value of default_directory.
1355 Note that these prefixes are not guaranteed to be absolute (except
1356 for the working dir of a drive). Therefore, to ensure we always
1357 return an absolute name, if the final prefix is not absolute we
1358 append it to the current working directory. */
1362 if (nm
[0] == '~') /* prefix ~ */
1364 if (IS_DIRECTORY_SEP (nm
[1])
1368 || nm
[1] == 0) /* ~ by itself */
1370 if (!(newdir
= (unsigned char *) egetenv ("HOME")))
1371 newdir
= (unsigned char *) "";
1374 collapse_newdir
= 0;
1377 nm
++; /* Don't leave the slash in nm. */
1380 else /* ~user/filename */
1382 for (p
= nm
; *p
&& (!IS_DIRECTORY_SEP (*p
)
1387 o
= (unsigned char *) alloca (p
- nm
+ 1);
1388 bcopy ((char *) nm
, o
, p
- nm
);
1391 pw
= (struct passwd
*) getpwnam (o
+ 1);
1394 newdir
= (unsigned char *) pw
-> pw_dir
;
1396 nm
= p
+ 1; /* skip the terminator */
1400 collapse_newdir
= 0;
1405 /* If we don't find a user of that name, leave the name
1406 unchanged; don't move nm forward to p. */
1411 /* On DOS and Windows, nm is absolute if a drive name was specified;
1412 use the drive's current directory as the prefix if needed. */
1413 if (!newdir
&& drive
)
1415 /* Get default directory if needed to make nm absolute. */
1416 if (!IS_DIRECTORY_SEP (nm
[0]))
1418 newdir
= alloca (MAXPATHLEN
+ 1);
1419 if (!getdefdir (toupper (drive
) - 'A' + 1, newdir
))
1424 /* Either nm starts with /, or drive isn't mounted. */
1425 newdir
= alloca (4);
1426 newdir
[0] = DRIVE_LETTER (drive
);
1434 /* Finally, if no prefix has been specified and nm is not absolute,
1435 then it must be expanded relative to default_directory. */
1439 /* /... alone is not absolute on DOS and Windows. */
1440 && !IS_DIRECTORY_SEP (nm
[0])
1443 && !(IS_DIRECTORY_SEP (nm
[0]) && IS_DIRECTORY_SEP (nm
[1]))
1450 newdir
= SDATA (default_directory
);
1451 multibyte
|= STRING_MULTIBYTE (default_directory
);
1453 /* Note if special escape prefix is present, but remove for now. */
1454 if (newdir
[0] == '/' && newdir
[1] == ':')
1465 /* First ensure newdir is an absolute name. */
1467 /* Detect MSDOS file names with drive specifiers. */
1468 ! (IS_DRIVE (newdir
[0])
1469 && IS_DEVICE_SEP (newdir
[1]) && IS_DIRECTORY_SEP (newdir
[2]))
1471 /* Detect Windows file names in UNC format. */
1472 && ! (IS_DIRECTORY_SEP (newdir
[0]) && IS_DIRECTORY_SEP (newdir
[1]))
1476 /* Effectively, let newdir be (expand-file-name newdir cwd).
1477 Because of the admonition against calling expand-file-name
1478 when we have pointers into lisp strings, we accomplish this
1479 indirectly by prepending newdir to nm if necessary, and using
1480 cwd (or the wd of newdir's drive) as the new newdir. */
1482 if (IS_DRIVE (newdir
[0]) && IS_DEVICE_SEP (newdir
[1]))
1487 if (!IS_DIRECTORY_SEP (nm
[0]))
1489 char * tmp
= alloca (strlen (newdir
) + strlen (nm
) + 2);
1490 file_name_as_directory (tmp
, newdir
);
1494 newdir
= alloca (MAXPATHLEN
+ 1);
1497 if (!getdefdir (toupper (drive
) - 'A' + 1, newdir
))
1504 /* Strip off drive name from prefix, if present. */
1505 if (IS_DRIVE (newdir
[0]) && IS_DEVICE_SEP (newdir
[1]))
1511 /* Keep only a prefix from newdir if nm starts with slash
1512 (//server/share for UNC, nothing otherwise). */
1513 if (IS_DIRECTORY_SEP (nm
[0]) && collapse_newdir
)
1516 if (IS_DIRECTORY_SEP (newdir
[0]) && IS_DIRECTORY_SEP (newdir
[1]))
1518 newdir
= strcpy (alloca (strlen (newdir
) + 1), newdir
);
1520 while (*p
&& !IS_DIRECTORY_SEP (*p
)) p
++;
1522 while (*p
&& !IS_DIRECTORY_SEP (*p
)) p
++;
1534 /* Get rid of any slash at the end of newdir, unless newdir is
1535 just / or // (an incomplete UNC name). */
1536 length
= strlen (newdir
);
1537 if (length
> 1 && IS_DIRECTORY_SEP (newdir
[length
- 1])
1539 && !(length
== 2 && IS_DIRECTORY_SEP (newdir
[0]))
1543 unsigned char *temp
= (unsigned char *) alloca (length
);
1544 bcopy (newdir
, temp
, length
- 1);
1545 temp
[length
- 1] = 0;
1553 /* Now concatenate the directory and name to new space in the stack frame */
1554 tlen
+= strlen (nm
) + 1;
1556 /* Reserve space for drive specifier and escape prefix, since either
1557 or both may need to be inserted. (The Microsoft x86 compiler
1558 produces incorrect code if the following two lines are combined.) */
1559 target
= (unsigned char *) alloca (tlen
+ 4);
1561 #else /* not DOS_NT */
1562 target
= (unsigned char *) alloca (tlen
);
1563 #endif /* not DOS_NT */
1569 if (nm
[0] == 0 || IS_DIRECTORY_SEP (nm
[0]))
1572 /* If newdir is effectively "C:/", then the drive letter will have
1573 been stripped and newdir will be "/". Concatenating with an
1574 absolute directory in nm produces "//", which will then be
1575 incorrectly treated as a network share. Ignore newdir in
1576 this case (keeping the drive letter). */
1577 if (!(drive
&& nm
[0] && IS_DIRECTORY_SEP (newdir
[0])
1578 && newdir
[1] == '\0'))
1580 strcpy (target
, newdir
);
1584 file_name_as_directory (target
, newdir
);
1587 strcat (target
, nm
);
1589 if (index (target
, '/'))
1590 strcpy (target
, sys_translate_unix (target
));
1593 /* ASSERT (IS_DIRECTORY_SEP (target[0])) if not VMS */
1595 /* Now canonicalize by removing `//', `/.' and `/foo/..' if they
1604 if (*p
!= ']' && *p
!= '>' && *p
!= '-')
1610 else if ((p
[0] == ']' || p
[0] == '>') && p
[0] == p
[1] + 2)
1611 /* brackets are offset from each other by 2 */
1614 if (*p
!= '.' && *p
!= '-' && o
[-1] != '.')
1615 /* convert [foo][bar] to [bar] */
1616 while (o
[-1] != '[' && o
[-1] != '<')
1618 else if (*p
== '-' && *o
!= '.')
1621 else if (p
[0] == '-' && o
[-1] == '.' &&
1622 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>'))
1623 /* flush .foo.- ; leave - if stopped by '[' or '<' */
1627 while (o
[-1] != '.' && o
[-1] != '[' && o
[-1] != '<');
1628 if (p
[1] == '.') /* foo.-.bar ==> bar. */
1630 else if (o
[-1] == '.') /* '.foo.-]' ==> ']' */
1632 /* else [foo.-] ==> [-] */
1636 #ifdef NO_HYPHENS_IN_FILENAMES
1638 o
[-1] != '[' && o
[-1] != '<' && o
[-1] != '.' &&
1639 p
[1] != ']' && p
[1] != '>' && p
[1] != '.')
1641 #endif /* NO_HYPHENS_IN_FILENAMES */
1645 if (!IS_DIRECTORY_SEP (*p
))
1649 else if (p
[1] == '.'
1650 && (IS_DIRECTORY_SEP (p
[2])
1653 /* If "/." is the entire filename, keep the "/". Otherwise,
1654 just delete the whole "/.". */
1655 if (o
== target
&& p
[2] == '\0')
1659 else if (p
[1] == '.' && p
[2] == '.'
1660 /* `/../' is the "superroot" on certain file systems.
1661 Turned off on DOS_NT systems because they have no
1662 "superroot" and because this causes us to produce
1663 file names like "d:/../foo" which fail file-related
1664 functions of the underlying OS. (To reproduce, try a
1665 long series of "../../" in default_directory, longer
1666 than the number of levels from the root.) */
1670 && (IS_DIRECTORY_SEP (p
[3]) || p
[3] == 0))
1672 while (o
!= target
&& (--o
) && !IS_DIRECTORY_SEP (*o
))
1674 /* Keep initial / only if this is the whole name. */
1675 if (o
== target
&& IS_ANY_SEP (*o
) && p
[3] == 0)
1679 else if (p
> target
&& IS_DIRECTORY_SEP (p
[1]))
1680 /* Collapse multiple `/' in a row. */
1686 #endif /* not VMS */
1690 /* At last, set drive name. */
1692 /* Except for network file name. */
1693 if (!(IS_DIRECTORY_SEP (target
[0]) && IS_DIRECTORY_SEP (target
[1])))
1694 #endif /* WINDOWSNT */
1696 if (!drive
) abort ();
1698 target
[0] = DRIVE_LETTER (drive
);
1701 /* Reinsert the escape prefix if required. */
1708 CORRECT_DIR_SEPS (target
);
1711 result
= make_specified_string (target
, -1, o
- target
, multibyte
);
1713 /* Again look to see if the file name has special constructs in it
1714 and perhaps call the corresponding file handler. This is needed
1715 for filenames such as "/foo/../user@host:/bar/../baz". Expanding
1716 the ".." component gives us "/user@host:/bar/../baz" which needs
1717 to be expanded again. */
1718 handler
= Ffind_file_name_handler (result
, Qexpand_file_name
);
1719 if (!NILP (handler
))
1720 return call3 (handler
, Qexpand_file_name
, result
, default_directory
);
1726 /* PLEASE DO NOT DELETE THIS COMMENTED-OUT VERSION!
1727 This is the old version of expand-file-name, before it was thoroughly
1728 rewritten for Emacs 10.31. We leave this version here commented-out,
1729 because the code is very complex and likely to have subtle bugs. If
1730 bugs _are_ found, it might be of interest to look at the old code and
1731 see what did it do in the relevant situation.
1733 Don't remove this code: it's true that it will be accessible via CVS,
1734 but a few years from deletion, people will forget it is there. */
1736 /* Changed this DEFUN to a DEAFUN, so as not to confuse `make-docfile'. */
1737 DEAFUN ("expand-file-name", Fexpand_file_name
, Sexpand_file_name
, 1, 2, 0,
1738 "Convert FILENAME to absolute, and canonicalize it.\n\
1739 Second arg DEFAULT is directory to start with if FILENAME is relative\n\
1740 \(does not start with slash); if DEFAULT is nil or missing,\n\
1741 the current buffer's value of default-directory is used.\n\
1742 Filenames containing `.' or `..' as components are simplified;\n\
1743 initial `~/' expands to your home directory.\n\
1744 See also the function `substitute-in-file-name'.")
1746 Lisp_Object name
, defalt
;
1750 register unsigned char *newdir
, *p
, *o
;
1752 unsigned char *target
;
1756 unsigned char * colon
= 0;
1757 unsigned char * close
= 0;
1758 unsigned char * slash
= 0;
1759 unsigned char * brack
= 0;
1760 int lbrack
= 0, rbrack
= 0;
1764 CHECK_STRING (name
);
1767 /* Filenames on VMS are always upper case. */
1768 name
= Fupcase (name
);
1773 /* If nm is absolute, flush ...// and detect /./ and /../.
1774 If no /./ or /../ we can return right away. */
1786 if (p
[0] == '/' && p
[1] == '/'
1788 /* // at start of filename is meaningful on Apollo system. */
1793 if (p
[0] == '/' && p
[1] == '~')
1794 nm
= p
+ 1, lose
= 1;
1795 if (p
[0] == '/' && p
[1] == '.'
1796 && (p
[2] == '/' || p
[2] == 0
1797 || (p
[2] == '.' && (p
[3] == '/' || p
[3] == 0))))
1803 /* if dev:[dir]/, move nm to / */
1804 if (!slash
&& p
> nm
&& (brack
|| colon
)) {
1805 nm
= (brack
? brack
+ 1 : colon
+ 1);
1806 lbrack
= rbrack
= 0;
1814 /* VMS pre V4.4,convert '-'s in filenames. */
1815 if (lbrack
== rbrack
)
1817 if (dots
< 2) /* this is to allow negative version numbers */
1822 if (lbrack
> rbrack
&&
1823 ((p
[-1] == '.' || p
[-1] == '[' || p
[-1] == '<') &&
1824 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>')))
1830 /* count open brackets, reset close bracket pointer */
1831 if (p
[0] == '[' || p
[0] == '<')
1832 lbrack
++, brack
= 0;
1833 /* count close brackets, set close bracket pointer */
1834 if (p
[0] == ']' || p
[0] == '>')
1835 rbrack
++, brack
= p
;
1836 /* detect ][ or >< */
1837 if ((p
[0] == ']' || p
[0] == '>') && (p
[1] == '[' || p
[1] == '<'))
1839 if ((p
[0] == ':' || p
[0] == ']' || p
[0] == '>') && p
[1] == '~')
1840 nm
= p
+ 1, lose
= 1;
1841 if (p
[0] == ':' && (colon
|| slash
))
1842 /* if dev1:[dir]dev2:, move nm to dev2: */
1848 /* If /name/dev:, move nm to dev: */
1851 /* If node::dev:, move colon following dev */
1852 else if (colon
&& colon
[-1] == ':')
1854 /* If dev1:dev2:, move nm to dev2: */
1855 else if (colon
&& colon
[-1] != ':')
1860 if (p
[0] == ':' && !colon
)
1866 if (lbrack
== rbrack
)
1869 else if (p
[0] == '.')
1877 if (index (nm
, '/'))
1878 return build_string (sys_translate_unix (nm
));
1880 if (nm
== SDATA (name
))
1882 return build_string (nm
);
1886 /* Now determine directory to start with and put it in NEWDIR */
1890 if (nm
[0] == '~') /* prefix ~ */
1895 || nm
[1] == 0)/* ~/filename */
1897 if (!(newdir
= (unsigned char *) egetenv ("HOME")))
1898 newdir
= (unsigned char *) "";
1901 nm
++; /* Don't leave the slash in nm. */
1904 else /* ~user/filename */
1906 /* Get past ~ to user */
1907 unsigned char *user
= nm
+ 1;
1908 /* Find end of name. */
1909 unsigned char *ptr
= (unsigned char *) index (user
, '/');
1910 int len
= ptr
? ptr
- user
: strlen (user
);
1912 unsigned char *ptr1
= index (user
, ':');
1913 if (ptr1
!= 0 && ptr1
- user
< len
)
1916 /* Copy the user name into temp storage. */
1917 o
= (unsigned char *) alloca (len
+ 1);
1918 bcopy ((char *) user
, o
, len
);
1921 /* Look up the user name. */
1922 pw
= (struct passwd
*) getpwnam (o
+ 1);
1924 error ("\"%s\" isn't a registered user", o
+ 1);
1926 newdir
= (unsigned char *) pw
->pw_dir
;
1928 /* Discard the user name from NM. */
1935 #endif /* not VMS */
1939 defalt
= current_buffer
->directory
;
1940 CHECK_STRING (defalt
);
1941 newdir
= SDATA (defalt
);
1944 /* Now concatenate the directory and name to new space in the stack frame */
1946 tlen
= (newdir
? strlen (newdir
) + 1 : 0) + strlen (nm
) + 1;
1947 target
= (unsigned char *) alloca (tlen
);
1953 if (nm
[0] == 0 || nm
[0] == '/')
1954 strcpy (target
, newdir
);
1957 file_name_as_directory (target
, newdir
);
1960 strcat (target
, nm
);
1962 if (index (target
, '/'))
1963 strcpy (target
, sys_translate_unix (target
));
1966 /* Now canonicalize by removing /. and /foo/.. if they appear */
1974 if (*p
!= ']' && *p
!= '>' && *p
!= '-')
1980 else if ((p
[0] == ']' || p
[0] == '>') && p
[0] == p
[1] + 2)
1981 /* brackets are offset from each other by 2 */
1984 if (*p
!= '.' && *p
!= '-' && o
[-1] != '.')
1985 /* convert [foo][bar] to [bar] */
1986 while (o
[-1] != '[' && o
[-1] != '<')
1988 else if (*p
== '-' && *o
!= '.')
1991 else if (p
[0] == '-' && o
[-1] == '.' &&
1992 (p
[1] == '.' || p
[1] == ']' || p
[1] == '>'))
1993 /* flush .foo.- ; leave - if stopped by '[' or '<' */
1997 while (o
[-1] != '.' && o
[-1] != '[' && o
[-1] != '<');
1998 if (p
[1] == '.') /* foo.-.bar ==> bar. */
2000 else if (o
[-1] == '.') /* '.foo.-]' ==> ']' */
2002 /* else [foo.-] ==> [-] */
2008 o
[-1] != '[' && o
[-1] != '<' && o
[-1] != '.' &&
2009 p
[1] != ']' && p
[1] != '>' && p
[1] != '.')
2019 else if (!strncmp (p
, "//", 2)
2021 /* // at start of filename is meaningful in Apollo system. */
2029 else if (p
[0] == '/' && p
[1] == '.' &&
2030 (p
[2] == '/' || p
[2] == 0))
2032 else if (!strncmp (p
, "/..", 3)
2033 /* `/../' is the "superroot" on certain file systems. */
2035 && (p
[3] == '/' || p
[3] == 0))
2037 while (o
!= target
&& *--o
!= '/')
2040 if (o
== target
+ 1 && o
[-1] == '/' && o
[0] == '/')
2044 if (o
== target
&& *o
== '/')
2052 #endif /* not VMS */
2055 return make_string (target
, o
- target
);
2059 /* If /~ or // appears, discard everything through first slash. */
2061 file_name_absolute_p (filename
)
2062 const unsigned char *filename
;
2065 (IS_DIRECTORY_SEP (*filename
) || *filename
== '~'
2067 /* ??? This criterion is probably wrong for '<'. */
2068 || index (filename
, ':') || index (filename
, '<')
2069 || (*filename
== '[' && (filename
[1] != '-'
2070 || (filename
[2] != '.' && filename
[2] != ']'))
2071 && filename
[1] != '.')
2074 || (IS_DRIVE (*filename
) && IS_DEVICE_SEP (filename
[1])
2075 && IS_DIRECTORY_SEP (filename
[2]))
2080 static unsigned char *
2081 search_embedded_absfilename (nm
, endp
)
2082 unsigned char *nm
, *endp
;
2084 unsigned char *p
, *s
;
2086 for (p
= nm
+ 1; p
< endp
; p
++)
2090 || p
[-1] == ':' || p
[-1] == ']' || p
[-1] == '>'
2092 || IS_DIRECTORY_SEP (p
[-1]))
2093 && file_name_absolute_p (p
)
2094 #if defined (APOLLO) || defined (WINDOWSNT) || defined(CYGWIN)
2095 /* // at start of file name is meaningful in Apollo,
2096 WindowsNT and Cygwin systems. */
2097 && !(IS_DIRECTORY_SEP (p
[0]) && p
- 1 == nm
)
2098 #endif /* not (APOLLO || WINDOWSNT || CYGWIN) */
2101 for (s
= p
; *s
&& (!IS_DIRECTORY_SEP (*s
)
2106 if (p
[0] == '~' && s
> p
+ 1) /* we've got "/~something/" */
2108 unsigned char *o
= alloca (s
- p
+ 1);
2110 bcopy (p
, o
, s
- p
);
2113 /* If we have ~user and `user' exists, discard
2114 everything up to ~. But if `user' does not exist, leave
2115 ~user alone, it might be a literal file name. */
2116 if ((pw
= getpwnam (o
+ 1)))
2128 DEFUN ("substitute-in-file-name", Fsubstitute_in_file_name
,
2129 Ssubstitute_in_file_name
, 1, 1, 0,
2130 doc
: /* Substitute environment variables referred to in FILENAME.
2131 `$FOO' where FOO is an environment variable name means to substitute
2132 the value of that variable. The variable name should be terminated
2133 with a character not a letter, digit or underscore; otherwise, enclose
2134 the entire variable name in braces.
2135 If `/~' appears, all of FILENAME through that `/' is discarded.
2137 On VMS, `$' substitution is not done; this function does little and only
2138 duplicates what `expand-file-name' does. */)
2140 Lisp_Object filename
;
2144 register unsigned char *s
, *p
, *o
, *x
, *endp
;
2145 unsigned char *target
= NULL
;
2147 int substituted
= 0;
2149 Lisp_Object handler
;
2151 CHECK_STRING (filename
);
2153 /* If the file name has special constructs in it,
2154 call the corresponding file handler. */
2155 handler
= Ffind_file_name_handler (filename
, Qsubstitute_in_file_name
);
2156 if (!NILP (handler
))
2157 return call2 (handler
, Qsubstitute_in_file_name
, filename
);
2159 nm
= SDATA (filename
);
2161 nm
= strcpy (alloca (strlen (nm
) + 1), nm
);
2162 CORRECT_DIR_SEPS (nm
);
2163 substituted
= (strcmp (nm
, SDATA (filename
)) != 0);
2165 endp
= nm
+ SBYTES (filename
);
2167 /* If /~ or // appears, discard everything through first slash. */
2168 p
= search_embedded_absfilename (nm
, endp
);
2170 /* Start over with the new string, so we check the file-name-handler
2171 again. Important with filenames like "/home/foo//:/hello///there"
2172 which whould substitute to "/:/hello///there" rather than "/there". */
2173 return Fsubstitute_in_file_name
2174 (make_specified_string (p
, -1, endp
- p
,
2175 STRING_MULTIBYTE (filename
)));
2181 /* See if any variables are substituted into the string
2182 and find the total length of their values in `total' */
2184 for (p
= nm
; p
!= endp
;)
2194 /* "$$" means a single "$" */
2203 while (p
!= endp
&& *p
!= '}') p
++;
2204 if (*p
!= '}') goto missingclose
;
2210 while (p
!= endp
&& (isalnum (*p
) || *p
== '_')) p
++;
2214 /* Copy out the variable name */
2215 target
= (unsigned char *) alloca (s
- o
+ 1);
2216 strncpy (target
, o
, s
- o
);
2219 strupr (target
); /* $home == $HOME etc. */
2222 /* Get variable value */
2223 o
= (unsigned char *) egetenv (target
);
2226 total
+= strlen (o
);
2236 /* If substitution required, recopy the string and do it */
2237 /* Make space in stack frame for the new copy */
2238 xnm
= (unsigned char *) alloca (SBYTES (filename
) + total
+ 1);
2241 /* Copy the rest of the name through, replacing $ constructs with values */
2258 while (p
!= endp
&& *p
!= '}') p
++;
2259 if (*p
!= '}') goto missingclose
;
2265 while (p
!= endp
&& (isalnum (*p
) || *p
== '_')) p
++;
2269 /* Copy out the variable name */
2270 target
= (unsigned char *) alloca (s
- o
+ 1);
2271 strncpy (target
, o
, s
- o
);
2274 strupr (target
); /* $home == $HOME etc. */
2277 /* Get variable value */
2278 o
= (unsigned char *) egetenv (target
);
2282 strcpy (x
, target
); x
+= strlen (target
);
2284 else if (STRING_MULTIBYTE (filename
))
2286 /* If the original string is multibyte,
2287 convert what we substitute into multibyte. */
2290 int c
= unibyte_char_to_multibyte (*o
++);
2291 x
+= CHAR_STRING (c
, x
);
2303 /* If /~ or // appears, discard everything through first slash. */
2304 while ((p
= search_embedded_absfilename (xnm
, x
)))
2305 /* This time we do not start over because we've already expanded envvars
2306 and replaced $$ with $. Maybe we should start over as well, but we'd
2307 need to quote some $ to $$ first. */
2310 return make_specified_string (xnm
, -1, x
- xnm
, STRING_MULTIBYTE (filename
));
2313 error ("Bad format environment-variable substitution");
2315 error ("Missing \"}\" in environment-variable substitution");
2317 error ("Substituting nonexistent environment variable \"%s\"", target
);
2320 #endif /* not VMS */
2324 /* A slightly faster and more convenient way to get
2325 (directory-file-name (expand-file-name FOO)). */
2328 expand_and_dir_to_file (filename
, defdir
)
2329 Lisp_Object filename
, defdir
;
2331 register Lisp_Object absname
;
2333 absname
= Fexpand_file_name (filename
, defdir
);
2336 register int c
= SREF (absname
, SBYTES (absname
) - 1);
2337 if (c
== ':' || c
== ']' || c
== '>')
2338 absname
= Fdirectory_file_name (absname
);
2341 /* Remove final slash, if any (unless this is the root dir).
2342 stat behaves differently depending! */
2343 if (SCHARS (absname
) > 1
2344 && IS_DIRECTORY_SEP (SREF (absname
, SBYTES (absname
) - 1))
2345 && !IS_DEVICE_SEP (SREF (absname
, SBYTES (absname
)-2)))
2346 /* We cannot take shortcuts; they might be wrong for magic file names. */
2347 absname
= Fdirectory_file_name (absname
);
2352 /* Signal an error if the file ABSNAME already exists.
2353 If INTERACTIVE is nonzero, ask the user whether to proceed,
2354 and bypass the error if the user says to go ahead.
2355 QUERYSTRING is a name for the action that is being considered
2358 *STATPTR is used to store the stat information if the file exists.
2359 If the file does not exist, STATPTR->st_mode is set to 0.
2360 If STATPTR is null, we don't store into it.
2362 If QUICK is nonzero, we ask for y or n, not yes or no. */
2365 barf_or_query_if_file_exists (absname
, querystring
, interactive
, statptr
, quick
)
2366 Lisp_Object absname
;
2367 unsigned char *querystring
;
2369 struct stat
*statptr
;
2372 register Lisp_Object tem
, encoded_filename
;
2373 struct stat statbuf
;
2374 struct gcpro gcpro1
;
2376 encoded_filename
= ENCODE_FILE (absname
);
2378 /* stat is a good way to tell whether the file exists,
2379 regardless of what access permissions it has. */
2380 if (lstat (SDATA (encoded_filename
), &statbuf
) >= 0)
2383 Fsignal (Qfile_already_exists
,
2384 Fcons (build_string ("File already exists"),
2385 Fcons (absname
, Qnil
)));
2387 tem
= format2 ("File %s already exists; %s anyway? ",
2388 absname
, build_string (querystring
));
2390 tem
= Fy_or_n_p (tem
);
2392 tem
= do_yes_or_no_p (tem
);
2395 Fsignal (Qfile_already_exists
,
2396 Fcons (build_string ("File already exists"),
2397 Fcons (absname
, Qnil
)));
2404 statptr
->st_mode
= 0;
2409 DEFUN ("copy-file", Fcopy_file
, Scopy_file
, 2, 5,
2410 "fCopy file: \nGCopy %s to file: \np\nP",
2411 doc
: /* Copy FILE to NEWNAME. Both args must be strings.
2412 If NEWNAME names a directory, copy FILE there.
2414 This function always sets the file modes of the output file to match
2417 The optional third argument OK-IF-ALREADY-EXISTS specifies what to do
2418 if file NEWNAME already exists. If OK-IF-ALREADY-EXISTS is nil, we
2419 signal a `file-already-exists' error without overwriting. If
2420 OK-IF-ALREADY-EXISTS is a number, we request confirmation from the user
2421 about overwriting; this is what happens in interactive use with M-x.
2422 Any other value for OK-IF-ALREADY-EXISTS means to overwrite the
2425 Fourth arg KEEP-TIME non-nil means give the output file the same
2426 last-modified time as the old one. (This works on only some systems.)
2428 A prefix arg makes KEEP-TIME non-nil.
2430 If PRESERVE-UID-GID is non-nil, we try to transfer the
2431 uid and gid of FILE to NEWNAME. */)
2432 (file
, newname
, ok_if_already_exists
, keep_time
, preserve_uid_gid
)
2433 Lisp_Object file
, newname
, ok_if_already_exists
, keep_time
;
2434 Lisp_Object preserve_uid_gid
;
2437 char buf
[16 * 1024];
2438 struct stat st
, out_st
;
2439 Lisp_Object handler
;
2440 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2441 int count
= SPECPDL_INDEX ();
2442 int input_file_statable_p
;
2443 Lisp_Object encoded_file
, encoded_newname
;
2445 encoded_file
= encoded_newname
= Qnil
;
2446 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
2447 CHECK_STRING (file
);
2448 CHECK_STRING (newname
);
2450 if (!NILP (Ffile_directory_p (newname
)))
2451 newname
= Fexpand_file_name (Ffile_name_nondirectory (file
), newname
);
2453 newname
= Fexpand_file_name (newname
, Qnil
);
2455 file
= Fexpand_file_name (file
, Qnil
);
2457 /* If the input file name has special constructs in it,
2458 call the corresponding file handler. */
2459 handler
= Ffind_file_name_handler (file
, Qcopy_file
);
2460 /* Likewise for output file name. */
2462 handler
= Ffind_file_name_handler (newname
, Qcopy_file
);
2463 if (!NILP (handler
))
2464 RETURN_UNGCPRO (call5 (handler
, Qcopy_file
, file
, newname
,
2465 ok_if_already_exists
, keep_time
));
2467 encoded_file
= ENCODE_FILE (file
);
2468 encoded_newname
= ENCODE_FILE (newname
);
2470 if (NILP (ok_if_already_exists
)
2471 || INTEGERP (ok_if_already_exists
))
2472 barf_or_query_if_file_exists (encoded_newname
, "copy to it",
2473 INTEGERP (ok_if_already_exists
), &out_st
, 0);
2474 else if (stat (SDATA (encoded_newname
), &out_st
) < 0)
2478 if (!CopyFile (SDATA (encoded_file
),
2479 SDATA (encoded_newname
),
2481 report_file_error ("Copying file", Fcons (file
, Fcons (newname
, Qnil
)));
2482 /* CopyFile retains the timestamp by default. */
2483 else if (NILP (keep_time
))
2489 EMACS_GET_TIME (now
);
2490 filename
= SDATA (encoded_newname
);
2492 /* Ensure file is writable while its modified time is set. */
2493 attributes
= GetFileAttributes (filename
);
2494 SetFileAttributes (filename
, attributes
& ~FILE_ATTRIBUTE_READONLY
);
2495 if (set_file_times (filename
, now
, now
))
2497 /* Restore original attributes. */
2498 SetFileAttributes (filename
, attributes
);
2499 Fsignal (Qfile_date_error
,
2500 Fcons (build_string ("Cannot set file date"),
2501 Fcons (newname
, Qnil
)));
2503 /* Restore original attributes. */
2504 SetFileAttributes (filename
, attributes
);
2506 #else /* not WINDOWSNT */
2508 ifd
= emacs_open (SDATA (encoded_file
), O_RDONLY
, 0);
2512 report_file_error ("Opening input file", Fcons (file
, Qnil
));
2514 record_unwind_protect (close_file_unwind
, make_number (ifd
));
2516 /* We can only copy regular files and symbolic links. Other files are not
2518 input_file_statable_p
= (fstat (ifd
, &st
) >= 0);
2520 #if !defined (MSDOS) || __DJGPP__ > 1
2521 if (out_st
.st_mode
!= 0
2522 && st
.st_dev
== out_st
.st_dev
&& st
.st_ino
== out_st
.st_ino
)
2525 report_file_error ("Input and output files are the same",
2526 Fcons (file
, Fcons (newname
, Qnil
)));
2530 #if defined (S_ISREG) && defined (S_ISLNK)
2531 if (input_file_statable_p
)
2533 if (!(S_ISREG (st
.st_mode
)) && !(S_ISLNK (st
.st_mode
)))
2535 #if defined (EISDIR)
2536 /* Get a better looking error message. */
2539 report_file_error ("Non-regular file", Fcons (file
, Qnil
));
2542 #endif /* S_ISREG && S_ISLNK */
2545 /* Create the copy file with the same record format as the input file */
2546 ofd
= sys_creat (SDATA (encoded_newname
), 0666, ifd
);
2549 /* System's default file type was set to binary by _fmode in emacs.c. */
2550 ofd
= emacs_open (SDATA (encoded_newname
),
2551 O_WRONLY
| O_TRUNC
| O_CREAT
2552 | (NILP (ok_if_already_exists
) ? O_EXCL
: 0),
2553 S_IREAD
| S_IWRITE
);
2554 #else /* not MSDOS */
2555 ofd
= emacs_open (SDATA (encoded_newname
),
2556 O_WRONLY
| O_TRUNC
| O_CREAT
2557 | (NILP (ok_if_already_exists
) ? O_EXCL
: 0),
2559 #endif /* not MSDOS */
2562 report_file_error ("Opening output file", Fcons (newname
, Qnil
));
2564 record_unwind_protect (close_file_unwind
, make_number (ofd
));
2568 while ((n
= emacs_read (ifd
, buf
, sizeof buf
)) > 0)
2569 if (emacs_write (ofd
, buf
, n
) != n
)
2570 report_file_error ("I/O error", Fcons (newname
, Qnil
));
2574 /* Preserve the original file modes, and if requested, also its
2576 if (input_file_statable_p
)
2578 if (! NILP (preserve_uid_gid
))
2579 fchown (ofd
, st
.st_uid
, st
.st_gid
);
2580 fchmod (ofd
, st
.st_mode
& 07777);
2582 #endif /* not MSDOS */
2584 /* Closing the output clobbers the file times on some systems. */
2585 if (emacs_close (ofd
) < 0)
2586 report_file_error ("I/O error", Fcons (newname
, Qnil
));
2588 if (input_file_statable_p
)
2590 if (!NILP (keep_time
))
2592 EMACS_TIME atime
, mtime
;
2593 EMACS_SET_SECS_USECS (atime
, st
.st_atime
, 0);
2594 EMACS_SET_SECS_USECS (mtime
, st
.st_mtime
, 0);
2595 if (set_file_times (SDATA (encoded_newname
),
2597 Fsignal (Qfile_date_error
,
2598 Fcons (build_string ("Cannot set file date"),
2599 Fcons (newname
, Qnil
)));
2605 #if defined (__DJGPP__) && __DJGPP__ > 1
2606 if (input_file_statable_p
)
2608 /* In DJGPP v2.0 and later, fstat usually returns true file mode bits,
2609 and if it can't, it tells so. Otherwise, under MSDOS we usually
2610 get only the READ bit, which will make the copied file read-only,
2611 so it's better not to chmod at all. */
2612 if ((_djstat_flags
& _STFAIL_WRITEBIT
) == 0)
2613 chmod (SDATA (encoded_newname
), st
.st_mode
& 07777);
2615 #endif /* DJGPP version 2 or newer */
2616 #endif /* not WINDOWSNT */
2618 /* Discard the unwind protects. */
2619 specpdl_ptr
= specpdl
+ count
;
2625 DEFUN ("make-directory-internal", Fmake_directory_internal
,
2626 Smake_directory_internal
, 1, 1, 0,
2627 doc
: /* Create a new directory named DIRECTORY. */)
2629 Lisp_Object directory
;
2631 const unsigned char *dir
;
2632 Lisp_Object handler
;
2633 Lisp_Object encoded_dir
;
2635 CHECK_STRING (directory
);
2636 directory
= Fexpand_file_name (directory
, Qnil
);
2638 handler
= Ffind_file_name_handler (directory
, Qmake_directory_internal
);
2639 if (!NILP (handler
))
2640 return call2 (handler
, Qmake_directory_internal
, directory
);
2642 encoded_dir
= ENCODE_FILE (directory
);
2644 dir
= SDATA (encoded_dir
);
2647 if (mkdir (dir
) != 0)
2649 if (mkdir (dir
, 0777) != 0)
2651 report_file_error ("Creating directory", Flist (1, &directory
));
2656 DEFUN ("delete-directory", Fdelete_directory
, Sdelete_directory
, 1, 1, "FDelete directory: ",
2657 doc
: /* Delete the directory named DIRECTORY. Does not follow symlinks. */)
2659 Lisp_Object directory
;
2661 const unsigned char *dir
;
2662 Lisp_Object handler
;
2663 Lisp_Object encoded_dir
;
2665 CHECK_STRING (directory
);
2666 directory
= Fdirectory_file_name (Fexpand_file_name (directory
, Qnil
));
2668 handler
= Ffind_file_name_handler (directory
, Qdelete_directory
);
2669 if (!NILP (handler
))
2670 return call2 (handler
, Qdelete_directory
, directory
);
2672 encoded_dir
= ENCODE_FILE (directory
);
2674 dir
= SDATA (encoded_dir
);
2676 if (rmdir (dir
) != 0)
2677 report_file_error ("Removing directory", Flist (1, &directory
));
2682 DEFUN ("delete-file", Fdelete_file
, Sdelete_file
, 1, 1, "fDelete file: ",
2683 doc
: /* Delete file named FILENAME. If it is a symlink, remove the symlink.
2684 If file has multiple names, it continues to exist with the other names. */)
2686 Lisp_Object filename
;
2688 Lisp_Object handler
;
2689 Lisp_Object encoded_file
;
2690 struct gcpro gcpro1
;
2693 if (!NILP (Ffile_directory_p (filename
))
2694 && NILP (Ffile_symlink_p (filename
)))
2695 Fsignal (Qfile_error
,
2696 Fcons (build_string ("Removing old name: is a directory"),
2697 Fcons (filename
, Qnil
)));
2699 filename
= Fexpand_file_name (filename
, Qnil
);
2701 handler
= Ffind_file_name_handler (filename
, Qdelete_file
);
2702 if (!NILP (handler
))
2703 return call2 (handler
, Qdelete_file
, filename
);
2705 encoded_file
= ENCODE_FILE (filename
);
2707 if (0 > unlink (SDATA (encoded_file
)))
2708 report_file_error ("Removing old name", Flist (1, &filename
));
2713 internal_delete_file_1 (ignore
)
2719 /* Delete file FILENAME, returning 1 if successful and 0 if failed. */
2722 internal_delete_file (filename
)
2723 Lisp_Object filename
;
2726 tem
= internal_condition_case_1 (Fdelete_file
, filename
,
2727 Qt
, internal_delete_file_1
);
2731 DEFUN ("rename-file", Frename_file
, Srename_file
, 2, 3,
2732 "fRename file: \nGRename %s to file: \np",
2733 doc
: /* Rename FILE as NEWNAME. Both args must be strings.
2734 If file has names other than FILE, it continues to have those names.
2735 Signals a `file-already-exists' error if a file NEWNAME already exists
2736 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2737 A number as third arg means request confirmation if NEWNAME already exists.
2738 This is what happens in interactive use with M-x. */)
2739 (file
, newname
, ok_if_already_exists
)
2740 Lisp_Object file
, newname
, ok_if_already_exists
;
2743 Lisp_Object args
[2];
2745 Lisp_Object handler
;
2746 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
2747 Lisp_Object encoded_file
, encoded_newname
, symlink_target
;
2749 symlink_target
= encoded_file
= encoded_newname
= Qnil
;
2750 GCPRO5 (file
, newname
, encoded_file
, encoded_newname
, symlink_target
);
2751 CHECK_STRING (file
);
2752 CHECK_STRING (newname
);
2753 file
= Fexpand_file_name (file
, Qnil
);
2755 if (!NILP (Ffile_directory_p (newname
)))
2756 newname
= Fexpand_file_name (Ffile_name_nondirectory (file
), newname
);
2758 newname
= Fexpand_file_name (newname
, Qnil
);
2760 /* If the file name has special constructs in it,
2761 call the corresponding file handler. */
2762 handler
= Ffind_file_name_handler (file
, Qrename_file
);
2764 handler
= Ffind_file_name_handler (newname
, Qrename_file
);
2765 if (!NILP (handler
))
2766 RETURN_UNGCPRO (call4 (handler
, Qrename_file
,
2767 file
, newname
, ok_if_already_exists
));
2769 encoded_file
= ENCODE_FILE (file
);
2770 encoded_newname
= ENCODE_FILE (newname
);
2773 /* If the file names are identical but for the case, don't ask for
2774 confirmation: they simply want to change the letter-case of the
2776 if (NILP (Fstring_equal (Fdowncase (file
), Fdowncase (newname
))))
2778 if (NILP (ok_if_already_exists
)
2779 || INTEGERP (ok_if_already_exists
))
2780 barf_or_query_if_file_exists (encoded_newname
, "rename to it",
2781 INTEGERP (ok_if_already_exists
), 0, 0);
2783 if (0 > rename (SDATA (encoded_file
), SDATA (encoded_newname
)))
2785 if (0 > link (SDATA (encoded_file
), SDATA (encoded_newname
))
2786 || 0 > unlink (SDATA (encoded_file
)))
2792 symlink_target
= Ffile_symlink_p (file
);
2793 if (! NILP (symlink_target
))
2794 Fmake_symbolic_link (symlink_target
, newname
,
2795 NILP (ok_if_already_exists
) ? Qnil
: Qt
);
2798 Fcopy_file (file
, newname
,
2799 /* We have already prompted if it was an integer,
2800 so don't have copy-file prompt again. */
2801 NILP (ok_if_already_exists
) ? Qnil
: Qt
,
2804 Fdelete_file (file
);
2811 report_file_error ("Renaming", Flist (2, args
));
2814 report_file_error ("Renaming", Flist (2, &file
));
2821 DEFUN ("add-name-to-file", Fadd_name_to_file
, Sadd_name_to_file
, 2, 3,
2822 "fAdd name to file: \nGName to add to %s: \np",
2823 doc
: /* Give FILE additional name NEWNAME. Both args must be strings.
2824 Signals a `file-already-exists' error if a file NEWNAME already exists
2825 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2826 A number as third arg means request confirmation if NEWNAME already exists.
2827 This is what happens in interactive use with M-x. */)
2828 (file
, newname
, ok_if_already_exists
)
2829 Lisp_Object file
, newname
, ok_if_already_exists
;
2832 Lisp_Object args
[2];
2834 Lisp_Object handler
;
2835 Lisp_Object encoded_file
, encoded_newname
;
2836 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2838 GCPRO4 (file
, newname
, encoded_file
, encoded_newname
);
2839 encoded_file
= encoded_newname
= Qnil
;
2840 CHECK_STRING (file
);
2841 CHECK_STRING (newname
);
2842 file
= Fexpand_file_name (file
, Qnil
);
2844 if (!NILP (Ffile_directory_p (newname
)))
2845 newname
= Fexpand_file_name (Ffile_name_nondirectory (file
), newname
);
2847 newname
= Fexpand_file_name (newname
, Qnil
);
2849 /* If the file name has special constructs in it,
2850 call the corresponding file handler. */
2851 handler
= Ffind_file_name_handler (file
, Qadd_name_to_file
);
2852 if (!NILP (handler
))
2853 RETURN_UNGCPRO (call4 (handler
, Qadd_name_to_file
, file
,
2854 newname
, ok_if_already_exists
));
2856 /* If the new name has special constructs in it,
2857 call the corresponding file handler. */
2858 handler
= Ffind_file_name_handler (newname
, Qadd_name_to_file
);
2859 if (!NILP (handler
))
2860 RETURN_UNGCPRO (call4 (handler
, Qadd_name_to_file
, file
,
2861 newname
, ok_if_already_exists
));
2863 encoded_file
= ENCODE_FILE (file
);
2864 encoded_newname
= ENCODE_FILE (newname
);
2866 if (NILP (ok_if_already_exists
)
2867 || INTEGERP (ok_if_already_exists
))
2868 barf_or_query_if_file_exists (encoded_newname
, "make it a new name",
2869 INTEGERP (ok_if_already_exists
), 0, 0);
2871 unlink (SDATA (newname
));
2872 if (0 > link (SDATA (encoded_file
), SDATA (encoded_newname
)))
2877 report_file_error ("Adding new name", Flist (2, args
));
2879 report_file_error ("Adding new name", Flist (2, &file
));
2888 DEFUN ("make-symbolic-link", Fmake_symbolic_link
, Smake_symbolic_link
, 2, 3,
2889 "FMake symbolic link to file: \nGMake symbolic link to file %s: \np",
2890 doc
: /* Make a symbolic link to FILENAME, named LINKNAME.
2891 Both args must be strings.
2892 Signals a `file-already-exists' error if a file LINKNAME already exists
2893 unless optional third argument OK-IF-ALREADY-EXISTS is non-nil.
2894 A number as third arg means request confirmation if LINKNAME already exists.
2895 This happens for interactive use with M-x. */)
2896 (filename
, linkname
, ok_if_already_exists
)
2897 Lisp_Object filename
, linkname
, ok_if_already_exists
;
2900 Lisp_Object args
[2];
2902 Lisp_Object handler
;
2903 Lisp_Object encoded_filename
, encoded_linkname
;
2904 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
2906 GCPRO4 (filename
, linkname
, encoded_filename
, encoded_linkname
);
2907 encoded_filename
= encoded_linkname
= Qnil
;
2908 CHECK_STRING (filename
);
2909 CHECK_STRING (linkname
);
2910 /* If the link target has a ~, we must expand it to get
2911 a truly valid file name. Otherwise, do not expand;
2912 we want to permit links to relative file names. */
2913 if (SREF (filename
, 0) == '~')
2914 filename
= Fexpand_file_name (filename
, Qnil
);
2916 if (!NILP (Ffile_directory_p (linkname
)))
2917 linkname
= Fexpand_file_name (Ffile_name_nondirectory (filename
), linkname
);
2919 linkname
= Fexpand_file_name (linkname
, Qnil
);
2921 /* If the file name has special constructs in it,
2922 call the corresponding file handler. */
2923 handler
= Ffind_file_name_handler (filename
, Qmake_symbolic_link
);
2924 if (!NILP (handler
))
2925 RETURN_UNGCPRO (call4 (handler
, Qmake_symbolic_link
, filename
,
2926 linkname
, ok_if_already_exists
));
2928 /* If the new link name has special constructs in it,
2929 call the corresponding file handler. */
2930 handler
= Ffind_file_name_handler (linkname
, Qmake_symbolic_link
);
2931 if (!NILP (handler
))
2932 RETURN_UNGCPRO (call4 (handler
, Qmake_symbolic_link
, filename
,
2933 linkname
, ok_if_already_exists
));
2935 encoded_filename
= ENCODE_FILE (filename
);
2936 encoded_linkname
= ENCODE_FILE (linkname
);
2938 if (NILP (ok_if_already_exists
)
2939 || INTEGERP (ok_if_already_exists
))
2940 barf_or_query_if_file_exists (encoded_linkname
, "make it a link",
2941 INTEGERP (ok_if_already_exists
), 0, 0);
2942 if (0 > symlink (SDATA (encoded_filename
),
2943 SDATA (encoded_linkname
)))
2945 /* If we didn't complain already, silently delete existing file. */
2946 if (errno
== EEXIST
)
2948 unlink (SDATA (encoded_linkname
));
2949 if (0 <= symlink (SDATA (encoded_filename
),
2950 SDATA (encoded_linkname
)))
2960 report_file_error ("Making symbolic link", Flist (2, args
));
2962 report_file_error ("Making symbolic link", Flist (2, &filename
));
2968 #endif /* S_IFLNK */
2972 DEFUN ("define-logical-name", Fdefine_logical_name
, Sdefine_logical_name
,
2973 2, 2, "sDefine logical name: \nsDefine logical name %s as: ",
2974 doc
: /* Define the job-wide logical name NAME to have the value STRING.
2975 If STRING is nil or a null string, the logical name NAME is deleted. */)
2980 CHECK_STRING (name
);
2982 delete_logical_name (SDATA (name
));
2985 CHECK_STRING (string
);
2987 if (SCHARS (string
) == 0)
2988 delete_logical_name (SDATA (name
));
2990 define_logical_name (SDATA (name
), SDATA (string
));
2999 DEFUN ("sysnetunam", Fsysnetunam
, Ssysnetunam
, 2, 2, 0,
3000 doc
: /* Open a network connection to PATH using LOGIN as the login string. */)
3002 Lisp_Object path
, login
;
3006 CHECK_STRING (path
);
3007 CHECK_STRING (login
);
3009 netresult
= netunam (SDATA (path
), SDATA (login
));
3011 if (netresult
== -1)
3016 #endif /* HPUX_NET */
3018 DEFUN ("file-name-absolute-p", Ffile_name_absolute_p
, Sfile_name_absolute_p
,
3020 doc
: /* Return t if file FILENAME specifies an absolute file name.
3021 On Unix, this is a name starting with a `/' or a `~'. */)
3023 Lisp_Object filename
;
3025 CHECK_STRING (filename
);
3026 return file_name_absolute_p (SDATA (filename
)) ? Qt
: Qnil
;
3029 /* Return nonzero if file FILENAME exists and can be executed. */
3032 check_executable (filename
)
3036 int len
= strlen (filename
);
3039 if (stat (filename
, &st
) < 0)
3041 #if defined (WINDOWSNT) || (defined (MSDOS) && __DJGPP__ > 1)
3042 return ((st
.st_mode
& S_IEXEC
) != 0);
3044 return (S_ISREG (st
.st_mode
)
3046 && (stricmp ((suffix
= filename
+ len
-4), ".com") == 0
3047 || stricmp (suffix
, ".exe") == 0
3048 || stricmp (suffix
, ".bat") == 0)
3049 || (st
.st_mode
& S_IFMT
) == S_IFDIR
);
3050 #endif /* not WINDOWSNT */
3051 #else /* not DOS_NT */
3052 #ifdef HAVE_EUIDACCESS
3053 return (euidaccess (filename
, 1) >= 0);
3055 /* Access isn't quite right because it uses the real uid
3056 and we really want to test with the effective uid.
3057 But Unix doesn't give us a right way to do it. */
3058 return (access (filename
, 1) >= 0);
3060 #endif /* not DOS_NT */
3063 /* Return nonzero if file FILENAME exists and can be written. */
3066 check_writable (filename
)
3071 if (stat (filename
, &st
) < 0)
3073 return (st
.st_mode
& S_IWRITE
|| (st
.st_mode
& S_IFMT
) == S_IFDIR
);
3074 #else /* not MSDOS */
3075 #ifdef HAVE_EUIDACCESS
3076 return (euidaccess (filename
, 2) >= 0);
3078 /* Access isn't quite right because it uses the real uid
3079 and we really want to test with the effective uid.
3080 But Unix doesn't give us a right way to do it.
3081 Opening with O_WRONLY could work for an ordinary file,
3082 but would lose for directories. */
3083 return (access (filename
, 2) >= 0);
3085 #endif /* not MSDOS */
3088 DEFUN ("file-exists-p", Ffile_exists_p
, Sfile_exists_p
, 1, 1, 0,
3089 doc
: /* Return t if file FILENAME exists (whether or not you can read it.)
3090 See also `file-readable-p' and `file-attributes'.
3091 This returns nil for a symlink to a nonexistent file.
3092 Use `file-symlink-p' to test for such links. */)
3094 Lisp_Object filename
;
3096 Lisp_Object absname
;
3097 Lisp_Object handler
;
3098 struct stat statbuf
;
3100 CHECK_STRING (filename
);
3101 absname
= Fexpand_file_name (filename
, Qnil
);
3103 /* If the file name has special constructs in it,
3104 call the corresponding file handler. */
3105 handler
= Ffind_file_name_handler (absname
, Qfile_exists_p
);
3106 if (!NILP (handler
))
3107 return call2 (handler
, Qfile_exists_p
, absname
);
3109 absname
= ENCODE_FILE (absname
);
3111 return (stat (SDATA (absname
), &statbuf
) >= 0) ? Qt
: Qnil
;
3114 DEFUN ("file-executable-p", Ffile_executable_p
, Sfile_executable_p
, 1, 1, 0,
3115 doc
: /* Return t if FILENAME can be executed by you.
3116 For a directory, this means you can access files in that directory. */)
3118 Lisp_Object filename
;
3120 Lisp_Object absname
;
3121 Lisp_Object handler
;
3123 CHECK_STRING (filename
);
3124 absname
= Fexpand_file_name (filename
, Qnil
);
3126 /* If the file name has special constructs in it,
3127 call the corresponding file handler. */
3128 handler
= Ffind_file_name_handler (absname
, Qfile_executable_p
);
3129 if (!NILP (handler
))
3130 return call2 (handler
, Qfile_executable_p
, absname
);
3132 absname
= ENCODE_FILE (absname
);
3134 return (check_executable (SDATA (absname
)) ? Qt
: Qnil
);
3137 DEFUN ("file-readable-p", Ffile_readable_p
, Sfile_readable_p
, 1, 1, 0,
3138 doc
: /* Return t if file FILENAME exists and you can read it.
3139 See also `file-exists-p' and `file-attributes'. */)
3141 Lisp_Object filename
;
3143 Lisp_Object absname
;
3144 Lisp_Object handler
;
3147 struct stat statbuf
;
3149 CHECK_STRING (filename
);
3150 absname
= Fexpand_file_name (filename
, Qnil
);
3152 /* If the file name has special constructs in it,
3153 call the corresponding file handler. */
3154 handler
= Ffind_file_name_handler (absname
, Qfile_readable_p
);
3155 if (!NILP (handler
))
3156 return call2 (handler
, Qfile_readable_p
, absname
);
3158 absname
= ENCODE_FILE (absname
);
3160 #if defined(DOS_NT) || defined(macintosh)
3161 /* Under MS-DOS, Windows, and Macintosh, open does not work for
3163 if (access (SDATA (absname
), 0) == 0)
3166 #else /* not DOS_NT and not macintosh */
3168 #if defined (S_ISFIFO) && defined (O_NONBLOCK)
3169 /* Opening a fifo without O_NONBLOCK can wait.
3170 We don't want to wait. But we don't want to mess wth O_NONBLOCK
3171 except in the case of a fifo, on a system which handles it. */
3172 desc
= stat (SDATA (absname
), &statbuf
);
3175 if (S_ISFIFO (statbuf
.st_mode
))
3176 flags
|= O_NONBLOCK
;
3178 desc
= emacs_open (SDATA (absname
), flags
, 0);
3183 #endif /* not DOS_NT and not macintosh */
3186 /* Having this before file-symlink-p mysteriously caused it to be forgotten
3188 DEFUN ("file-writable-p", Ffile_writable_p
, Sfile_writable_p
, 1, 1, 0,
3189 doc
: /* Return t if file FILENAME can be written or created by you. */)
3191 Lisp_Object filename
;
3193 Lisp_Object absname
, dir
, encoded
;
3194 Lisp_Object handler
;
3195 struct stat statbuf
;
3197 CHECK_STRING (filename
);
3198 absname
= Fexpand_file_name (filename
, Qnil
);
3200 /* If the file name has special constructs in it,
3201 call the corresponding file handler. */
3202 handler
= Ffind_file_name_handler (absname
, Qfile_writable_p
);
3203 if (!NILP (handler
))
3204 return call2 (handler
, Qfile_writable_p
, absname
);
3206 encoded
= ENCODE_FILE (absname
);
3207 if (stat (SDATA (encoded
), &statbuf
) >= 0)
3208 return (check_writable (SDATA (encoded
))
3211 dir
= Ffile_name_directory (absname
);
3214 dir
= Fdirectory_file_name (dir
);
3218 dir
= Fdirectory_file_name (dir
);
3221 dir
= ENCODE_FILE (dir
);
3223 /* The read-only attribute of the parent directory doesn't affect
3224 whether a file or directory can be created within it. Some day we
3225 should check ACLs though, which do affect this. */
3226 if (stat (SDATA (dir
), &statbuf
) < 0)
3228 return (statbuf
.st_mode
& S_IFMT
) == S_IFDIR
? Qt
: Qnil
;
3230 return (check_writable (!NILP (dir
) ? (char *) SDATA (dir
) : "")
3235 DEFUN ("access-file", Faccess_file
, Saccess_file
, 2, 2, 0,
3236 doc
: /* Access file FILENAME, and get an error if that does not work.
3237 The second argument STRING is used in the error message.
3238 If there is no error, returns nil. */)
3240 Lisp_Object filename
, string
;
3242 Lisp_Object handler
, encoded_filename
, absname
;
3245 CHECK_STRING (filename
);
3246 absname
= Fexpand_file_name (filename
, Qnil
);
3248 CHECK_STRING (string
);
3250 /* If the file name has special constructs in it,
3251 call the corresponding file handler. */
3252 handler
= Ffind_file_name_handler (absname
, Qaccess_file
);
3253 if (!NILP (handler
))
3254 return call3 (handler
, Qaccess_file
, absname
, string
);
3256 encoded_filename
= ENCODE_FILE (absname
);
3258 fd
= emacs_open (SDATA (encoded_filename
), O_RDONLY
, 0);
3260 report_file_error (SDATA (string
), Fcons (filename
, Qnil
));
3266 DEFUN ("file-symlink-p", Ffile_symlink_p
, Sfile_symlink_p
, 1, 1, 0,
3267 doc
: /* Return non-nil if file FILENAME is the name of a symbolic link.
3268 The value is the link target, as a string.
3269 Otherwise it returns nil.
3271 This function returns t when given the name of a symlink that
3272 points to a nonexistent file. */)
3274 Lisp_Object filename
;
3276 Lisp_Object handler
;
3278 CHECK_STRING (filename
);
3279 filename
= Fexpand_file_name (filename
, Qnil
);
3281 /* If the file name has special constructs in it,
3282 call the corresponding file handler. */
3283 handler
= Ffind_file_name_handler (filename
, Qfile_symlink_p
);
3284 if (!NILP (handler
))
3285 return call2 (handler
, Qfile_symlink_p
, filename
);
3294 filename
= ENCODE_FILE (filename
);
3301 buf
= (char *) xrealloc (buf
, bufsize
);
3302 bzero (buf
, bufsize
);
3305 valsize
= readlink (SDATA (filename
), buf
, bufsize
);
3309 /* HP-UX reports ERANGE if buffer is too small. */
3310 if (errno
== ERANGE
)
3320 while (valsize
>= bufsize
);
3322 val
= make_string (buf
, valsize
);
3323 if (buf
[0] == '/' && index (buf
, ':'))
3324 val
= concat2 (build_string ("/:"), val
);
3326 val
= DECODE_FILE (val
);
3329 #else /* not S_IFLNK */
3331 #endif /* not S_IFLNK */
3334 DEFUN ("file-directory-p", Ffile_directory_p
, Sfile_directory_p
, 1, 1, 0,
3335 doc
: /* Return t if FILENAME names an existing directory.
3336 Symbolic links to directories count as directories.
3337 See `file-symlink-p' to distinguish symlinks. */)
3339 Lisp_Object filename
;
3341 register Lisp_Object absname
;
3343 Lisp_Object handler
;
3345 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3347 /* If the file name has special constructs in it,
3348 call the corresponding file handler. */
3349 handler
= Ffind_file_name_handler (absname
, Qfile_directory_p
);
3350 if (!NILP (handler
))
3351 return call2 (handler
, Qfile_directory_p
, absname
);
3353 absname
= ENCODE_FILE (absname
);
3355 if (stat (SDATA (absname
), &st
) < 0)
3357 return (st
.st_mode
& S_IFMT
) == S_IFDIR
? Qt
: Qnil
;
3360 DEFUN ("file-accessible-directory-p", Ffile_accessible_directory_p
, Sfile_accessible_directory_p
, 1, 1, 0,
3361 doc
: /* Return t if file FILENAME names a directory you can open.
3362 For the value to be t, FILENAME must specify the name of a directory as a file,
3363 and the directory must allow you to open files in it. In order to use a
3364 directory as a buffer's current directory, this predicate must return true.
3365 A directory name spec may be given instead; then the value is t
3366 if the directory so specified exists and really is a readable and
3367 searchable directory. */)
3369 Lisp_Object filename
;
3371 Lisp_Object handler
;
3373 struct gcpro gcpro1
;
3375 /* If the file name has special constructs in it,
3376 call the corresponding file handler. */
3377 handler
= Ffind_file_name_handler (filename
, Qfile_accessible_directory_p
);
3378 if (!NILP (handler
))
3379 return call2 (handler
, Qfile_accessible_directory_p
, filename
);
3382 tem
= (NILP (Ffile_directory_p (filename
))
3383 || NILP (Ffile_executable_p (filename
)));
3385 return tem
? Qnil
: Qt
;
3388 DEFUN ("file-regular-p", Ffile_regular_p
, Sfile_regular_p
, 1, 1, 0,
3389 doc
: /* Return t if FILENAME names a regular file.
3390 This is the sort of file that holds an ordinary stream of data bytes.
3391 Symbolic links to regular files count as regular files.
3392 See `file-symlink-p' to distinguish symlinks. */)
3394 Lisp_Object filename
;
3396 register Lisp_Object absname
;
3398 Lisp_Object handler
;
3400 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3402 /* If the file name has special constructs in it,
3403 call the corresponding file handler. */
3404 handler
= Ffind_file_name_handler (absname
, Qfile_regular_p
);
3405 if (!NILP (handler
))
3406 return call2 (handler
, Qfile_regular_p
, absname
);
3408 absname
= ENCODE_FILE (absname
);
3413 Lisp_Object tem
= Vw32_get_true_file_attributes
;
3415 /* Tell stat to use expensive method to get accurate info. */
3416 Vw32_get_true_file_attributes
= Qt
;
3417 result
= stat (SDATA (absname
), &st
);
3418 Vw32_get_true_file_attributes
= tem
;
3422 return (st
.st_mode
& S_IFMT
) == S_IFREG
? Qt
: Qnil
;
3425 if (stat (SDATA (absname
), &st
) < 0)
3427 return (st
.st_mode
& S_IFMT
) == S_IFREG
? Qt
: Qnil
;
3431 DEFUN ("file-modes", Ffile_modes
, Sfile_modes
, 1, 1, 0,
3432 doc
: /* Return mode bits of file named FILENAME, as an integer.
3433 Return nil, if file does not exist or is not accessible. */)
3435 Lisp_Object filename
;
3437 Lisp_Object absname
;
3439 Lisp_Object handler
;
3441 absname
= expand_and_dir_to_file (filename
, current_buffer
->directory
);
3443 /* If the file name has special constructs in it,
3444 call the corresponding file handler. */
3445 handler
= Ffind_file_name_handler (absname
, Qfile_modes
);
3446 if (!NILP (handler
))
3447 return call2 (handler
, Qfile_modes
, absname
);
3449 absname
= ENCODE_FILE (absname
);
3451 if (stat (SDATA (absname
), &st
) < 0)
3453 #if defined (MSDOS) && __DJGPP__ < 2
3454 if (check_executable (SDATA (absname
)))
3455 st
.st_mode
|= S_IEXEC
;
3456 #endif /* MSDOS && __DJGPP__ < 2 */
3458 return make_number (st
.st_mode
& 07777);
3461 DEFUN ("set-file-modes", Fset_file_modes
, Sset_file_modes
, 2, 2, 0,
3462 doc
: /* Set mode bits of file named FILENAME to MODE (an integer).
3463 Only the 12 low bits of MODE are used. */)
3465 Lisp_Object filename
, mode
;
3467 Lisp_Object absname
, encoded_absname
;
3468 Lisp_Object handler
;
3470 absname
= Fexpand_file_name (filename
, current_buffer
->directory
);
3471 CHECK_NUMBER (mode
);
3473 /* If the file name has special constructs in it,
3474 call the corresponding file handler. */
3475 handler
= Ffind_file_name_handler (absname
, Qset_file_modes
);
3476 if (!NILP (handler
))
3477 return call3 (handler
, Qset_file_modes
, absname
, mode
);
3479 encoded_absname
= ENCODE_FILE (absname
);
3481 if (chmod (SDATA (encoded_absname
), XINT (mode
)) < 0)
3482 report_file_error ("Doing chmod", Fcons (absname
, Qnil
));
3487 DEFUN ("set-default-file-modes", Fset_default_file_modes
, Sset_default_file_modes
, 1, 1, 0,
3488 doc
: /* Set the file permission bits for newly created files.
3489 The argument MODE should be an integer; only the low 9 bits are used.
3490 This setting is inherited by subprocesses. */)
3494 CHECK_NUMBER (mode
);
3496 umask ((~ XINT (mode
)) & 0777);
3501 DEFUN ("default-file-modes", Fdefault_file_modes
, Sdefault_file_modes
, 0, 0, 0,
3502 doc
: /* Return the default file protection for created files.
3503 The value is an integer. */)
3509 realmask
= umask (0);
3512 XSETINT (value
, (~ realmask
) & 0777);
3516 extern int lisp_time_argument
P_ ((Lisp_Object
, time_t *, int *));
3518 DEFUN ("set-file-times", Fset_file_times
, Sset_file_times
, 1, 2, 0,
3519 doc
: /* Set times of file FILENAME to TIME.
3520 Set both access and modification times.
3521 Return t on success, else nil.
3522 Use the current time if TIME is nil. TIME is in the format of
3525 Lisp_Object filename
, time
;
3527 Lisp_Object absname
, encoded_absname
;
3528 Lisp_Object handler
;
3532 if (! lisp_time_argument (time
, &sec
, &usec
))
3533 error ("Invalid time specification");
3535 absname
= Fexpand_file_name (filename
, current_buffer
->directory
);
3537 /* If the file name has special constructs in it,
3538 call the corresponding file handler. */
3539 handler
= Ffind_file_name_handler (absname
, Qset_file_times
);
3540 if (!NILP (handler
))
3541 return call3 (handler
, Qset_file_times
, absname
, time
);
3543 encoded_absname
= ENCODE_FILE (absname
);
3548 EMACS_SET_SECS (t
, sec
);
3549 EMACS_SET_USECS (t
, usec
);
3551 if (set_file_times (SDATA (encoded_absname
), t
, t
))
3556 /* Setting times on a directory always fails. */
3557 if (stat (SDATA (encoded_absname
), &st
) == 0
3558 && (st
.st_mode
& S_IFMT
) == S_IFDIR
)
3561 report_file_error ("Setting file times", Fcons (absname
, Qnil
));
3574 DEFUN ("unix-sync", Funix_sync
, Sunix_sync
, 0, 0, "",
3575 doc
: /* Tell Unix to finish all pending disk updates. */)
3584 DEFUN ("file-newer-than-file-p", Ffile_newer_than_file_p
, Sfile_newer_than_file_p
, 2, 2, 0,
3585 doc
: /* Return t if file FILE1 is newer than file FILE2.
3586 If FILE1 does not exist, the answer is nil;
3587 otherwise, if FILE2 does not exist, the answer is t. */)
3589 Lisp_Object file1
, file2
;
3591 Lisp_Object absname1
, absname2
;
3594 Lisp_Object handler
;
3595 struct gcpro gcpro1
, gcpro2
;
3597 CHECK_STRING (file1
);
3598 CHECK_STRING (file2
);
3601 GCPRO2 (absname1
, file2
);
3602 absname1
= expand_and_dir_to_file (file1
, current_buffer
->directory
);
3603 absname2
= expand_and_dir_to_file (file2
, current_buffer
->directory
);
3606 /* If the file name has special constructs in it,
3607 call the corresponding file handler. */
3608 handler
= Ffind_file_name_handler (absname1
, Qfile_newer_than_file_p
);
3610 handler
= Ffind_file_name_handler (absname2
, Qfile_newer_than_file_p
);
3611 if (!NILP (handler
))
3612 return call3 (handler
, Qfile_newer_than_file_p
, absname1
, absname2
);
3614 GCPRO2 (absname1
, absname2
);
3615 absname1
= ENCODE_FILE (absname1
);
3616 absname2
= ENCODE_FILE (absname2
);
3619 if (stat (SDATA (absname1
), &st
) < 0)
3622 mtime1
= st
.st_mtime
;
3624 if (stat (SDATA (absname2
), &st
) < 0)
3627 return (mtime1
> st
.st_mtime
) ? Qt
: Qnil
;
3631 Lisp_Object Qfind_buffer_file_type
;
3634 #ifndef READ_BUF_SIZE
3635 #define READ_BUF_SIZE (64 << 10)
3638 extern void adjust_markers_for_delete
P_ ((int, int, int, int));
3640 /* This function is called after Lisp functions to decide a coding
3641 system are called, or when they cause an error. Before they are
3642 called, the current buffer is set unibyte and it contains only a
3643 newly inserted text (thus the buffer was empty before the
3646 The functions may set markers, overlays, text properties, or even
3647 alter the buffer contents, change the current buffer.
3649 Here, we reset all those changes by:
3650 o set back the current buffer.
3651 o move all markers and overlays to BEG.
3652 o remove all text properties.
3653 o set back the buffer multibyteness. */
3656 decide_coding_unwind (unwind_data
)
3657 Lisp_Object unwind_data
;
3659 Lisp_Object multibyte
, undo_list
, buffer
;
3661 multibyte
= XCAR (unwind_data
);
3662 unwind_data
= XCDR (unwind_data
);
3663 undo_list
= XCAR (unwind_data
);
3664 buffer
= XCDR (unwind_data
);
3666 if (current_buffer
!= XBUFFER (buffer
))
3667 set_buffer_internal (XBUFFER (buffer
));
3668 adjust_markers_for_delete (BEG
, BEG_BYTE
, Z
, Z_BYTE
);
3669 adjust_overlays_for_delete (BEG
, Z
- BEG
);
3670 BUF_INTERVALS (current_buffer
) = 0;
3671 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
3673 /* Now we are safe to change the buffer's multibyteness directly. */
3674 current_buffer
->enable_multibyte_characters
= multibyte
;
3675 current_buffer
->undo_list
= undo_list
;
3681 /* Used to pass values from insert-file-contents to read_non_regular. */
3683 static int non_regular_fd
;
3684 static int non_regular_inserted
;
3685 static int non_regular_nbytes
;
3688 /* Read from a non-regular file.
3689 Read non_regular_trytry bytes max from non_regular_fd.
3690 Non_regular_inserted specifies where to put the read bytes.
3691 Value is the number of bytes read. */
3700 nbytes
= emacs_read (non_regular_fd
,
3701 BEG_ADDR
+ PT_BYTE
- BEG_BYTE
+ non_regular_inserted
,
3702 non_regular_nbytes
);
3704 return make_number (nbytes
);
3708 /* Condition-case handler used when reading from non-regular files
3709 in insert-file-contents. */
3712 read_non_regular_quit ()
3718 DEFUN ("insert-file-contents", Finsert_file_contents
, Sinsert_file_contents
,
3720 doc
: /* Insert contents of file FILENAME after point.
3721 Returns list of absolute file name and number of characters inserted.
3722 If second argument VISIT is non-nil, the buffer's visited filename
3723 and last save file modtime are set, and it is marked unmodified.
3724 If visiting and the file does not exist, visiting is completed
3725 before the error is signaled.
3726 The optional third and fourth arguments BEG and END
3727 specify what portion of the file to insert.
3728 These arguments count bytes in the file, not characters in the buffer.
3729 If VISIT is non-nil, BEG and END must be nil.
3731 If optional fifth argument REPLACE is non-nil,
3732 it means replace the current buffer contents (in the accessible portion)
3733 with the file contents. This is better than simply deleting and inserting
3734 the whole thing because (1) it preserves some marker positions
3735 and (2) it puts less data in the undo list.
3736 When REPLACE is non-nil, the value is the number of characters actually read,
3737 which is often less than the number of characters to be read.
3739 This does code conversion according to the value of
3740 `coding-system-for-read' or `file-coding-system-alist',
3741 and sets the variable `last-coding-system-used' to the coding system
3743 (filename
, visit
, beg
, end
, replace
)
3744 Lisp_Object filename
, visit
, beg
, end
, replace
;
3749 register int how_much
;
3750 register int unprocessed
;
3751 int count
= SPECPDL_INDEX ();
3752 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3753 Lisp_Object handler
, val
, insval
, orig_filename
;
3756 int not_regular
= 0;
3757 unsigned char read_buf
[READ_BUF_SIZE
];
3758 struct coding_system coding
;
3759 unsigned char buffer
[1 << 14];
3760 int replace_handled
= 0;
3761 int set_coding_system
= 0;
3762 int coding_system_decided
= 0;
3764 Lisp_Object old_Vdeactivate_mark
= Vdeactivate_mark
;
3765 int we_locked_file
= 0;
3767 if (current_buffer
->base_buffer
&& ! NILP (visit
))
3768 error ("Cannot do file visiting in an indirect buffer");
3770 if (!NILP (current_buffer
->read_only
))
3771 Fbarf_if_buffer_read_only ();
3775 orig_filename
= Qnil
;
3777 GCPRO4 (filename
, val
, p
, orig_filename
);
3779 CHECK_STRING (filename
);
3780 filename
= Fexpand_file_name (filename
, Qnil
);
3782 /* If the file name has special constructs in it,
3783 call the corresponding file handler. */
3784 handler
= Ffind_file_name_handler (filename
, Qinsert_file_contents
);
3785 if (!NILP (handler
))
3787 val
= call6 (handler
, Qinsert_file_contents
, filename
,
3788 visit
, beg
, end
, replace
);
3789 if (CONSP (val
) && CONSP (XCDR (val
)))
3790 inserted
= XINT (XCAR (XCDR (val
)));
3794 orig_filename
= filename
;
3795 filename
= ENCODE_FILE (filename
);
3801 Lisp_Object tem
= Vw32_get_true_file_attributes
;
3803 /* Tell stat to use expensive method to get accurate info. */
3804 Vw32_get_true_file_attributes
= Qt
;
3805 total
= stat (SDATA (filename
), &st
);
3806 Vw32_get_true_file_attributes
= tem
;
3811 if (stat (SDATA (filename
), &st
) < 0)
3813 if ((fd
= emacs_open (SDATA (filename
), O_RDONLY
, 0)) < 0
3814 || fstat (fd
, &st
) < 0)
3815 #endif /* not APOLLO */
3816 #endif /* WINDOWSNT */
3818 if (fd
>= 0) emacs_close (fd
);
3821 report_file_error ("Opening input file", Fcons (orig_filename
, Qnil
));
3824 if (!NILP (Vcoding_system_for_read
))
3825 Fset (Qbuffer_file_coding_system
, Vcoding_system_for_read
);
3830 /* This code will need to be changed in order to work on named
3831 pipes, and it's probably just not worth it. So we should at
3832 least signal an error. */
3833 if (!S_ISREG (st
.st_mode
))
3840 if (! NILP (replace
) || ! NILP (beg
) || ! NILP (end
))
3841 Fsignal (Qfile_error
,
3842 Fcons (build_string ("not a regular file"),
3843 Fcons (orig_filename
, Qnil
)));
3848 if ((fd
= emacs_open (SDATA (filename
), O_RDONLY
, 0)) < 0)
3851 /* Replacement should preserve point as it preserves markers. */
3852 if (!NILP (replace
))
3853 record_unwind_protect (restore_point_unwind
, Fpoint_marker ());
3855 record_unwind_protect (close_file_unwind
, make_number (fd
));
3857 /* Supposedly happens on VMS. */
3858 /* Can happen on any platform that uses long as type of off_t, but allows
3859 file sizes to exceed 2Gb. VMS is no longer officially supported, so
3860 give a message suitable for the latter case. */
3861 if (! not_regular
&& st
.st_size
< 0)
3862 error ("Maximum buffer size exceeded");
3864 /* Prevent redisplay optimizations. */
3865 current_buffer
->clip_changed
= 1;
3869 if (!NILP (beg
) || !NILP (end
))
3870 error ("Attempt to visit less than an entire file");
3871 if (BEG
< Z
&& NILP (replace
))
3872 error ("Cannot do file visiting in a non-empty buffer");
3878 XSETFASTINT (beg
, 0);
3886 XSETINT (end
, st
.st_size
);
3888 /* Arithmetic overflow can occur if an Emacs integer cannot
3889 represent the file size, or if the calculations below
3890 overflow. The calculations below double the file size
3891 twice, so check that it can be multiplied by 4 safely. */
3892 if (XINT (end
) != st
.st_size
3893 || ((int) st
.st_size
* 4) / 4 != st
.st_size
)
3894 error ("Maximum buffer size exceeded");
3896 /* The file size returned from stat may be zero, but data
3897 may be readable nonetheless, for example when this is a
3898 file in the /proc filesystem. */
3899 if (st
.st_size
== 0)
3900 XSETINT (end
, READ_BUF_SIZE
);
3904 if (EQ (Vcoding_system_for_read
, Qauto_save_coding
))
3906 /* We use emacs-mule for auto saving... */
3907 setup_coding_system (Qemacs_mule
, &coding
);
3908 /* ... but with the special flag to indicate to read in a
3909 multibyte sequence for eight-bit-control char as is. */
3911 coding
.src_multibyte
= 0;
3912 coding
.dst_multibyte
3913 = !NILP (current_buffer
->enable_multibyte_characters
);
3914 coding
.eol_type
= CODING_EOL_LF
;
3915 coding_system_decided
= 1;
3919 /* Decide the coding system to use for reading the file now
3920 because we can't use an optimized method for handling
3921 `coding:' tag if the current buffer is not empty. */
3925 if (!NILP (Vcoding_system_for_read
))
3926 val
= Vcoding_system_for_read
;
3929 /* Don't try looking inside a file for a coding system
3930 specification if it is not seekable. */
3931 if (! not_regular
&& ! NILP (Vset_auto_coding_function
))
3933 /* Find a coding system specified in the heading two
3934 lines or in the tailing several lines of the file.
3935 We assume that the 1K-byte and 3K-byte for heading
3936 and tailing respectively are sufficient for this
3940 if (st
.st_size
<= (1024 * 4))
3941 nread
= emacs_read (fd
, read_buf
, 1024 * 4);
3944 nread
= emacs_read (fd
, read_buf
, 1024);
3947 if (lseek (fd
, st
.st_size
- (1024 * 3), 0) < 0)
3948 report_file_error ("Setting file position",
3949 Fcons (orig_filename
, Qnil
));
3950 nread
+= emacs_read (fd
, read_buf
+ nread
, 1024 * 3);
3955 error ("IO error reading %s: %s",
3956 SDATA (orig_filename
), emacs_strerror (errno
));
3959 struct buffer
*prev
= current_buffer
;
3963 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
3965 buffer
= Fget_buffer_create (build_string (" *code-converting-work*"));
3966 buf
= XBUFFER (buffer
);
3968 delete_all_overlays (buf
);
3969 buf
->directory
= current_buffer
->directory
;
3970 buf
->read_only
= Qnil
;
3971 buf
->filename
= Qnil
;
3972 buf
->undo_list
= Qt
;
3973 eassert (buf
->overlays_before
== NULL
);
3974 eassert (buf
->overlays_after
== NULL
);
3976 set_buffer_internal (buf
);
3978 buf
->enable_multibyte_characters
= Qnil
;
3980 insert_1_both (read_buf
, nread
, nread
, 0, 0, 0);
3981 TEMP_SET_PT_BOTH (BEG
, BEG_BYTE
);
3982 val
= call2 (Vset_auto_coding_function
,
3983 filename
, make_number (nread
));
3984 set_buffer_internal (prev
);
3986 /* Discard the unwind protect for recovering the
3990 /* Rewind the file for the actual read done later. */
3991 if (lseek (fd
, 0, 0) < 0)
3992 report_file_error ("Setting file position",
3993 Fcons (orig_filename
, Qnil
));
3999 /* If we have not yet decided a coding system, check
4000 file-coding-system-alist. */
4001 Lisp_Object args
[6], coding_systems
;
4003 args
[0] = Qinsert_file_contents
, args
[1] = orig_filename
;
4004 args
[2] = visit
, args
[3] = beg
, args
[4] = end
, args
[5] = replace
;
4005 coding_systems
= Ffind_operation_coding_system (6, args
);
4006 if (CONSP (coding_systems
))
4007 val
= XCAR (coding_systems
);
4011 setup_coding_system (Fcheck_coding_system (val
), &coding
);
4012 /* Ensure we set Vlast_coding_system_used. */
4013 set_coding_system
= 1;
4015 if (NILP (current_buffer
->enable_multibyte_characters
)
4017 /* We must suppress all character code conversion except for
4018 end-of-line conversion. */
4019 setup_raw_text_coding_system (&coding
);
4021 coding
.src_multibyte
= 0;
4022 coding
.dst_multibyte
4023 = !NILP (current_buffer
->enable_multibyte_characters
);
4024 coding_system_decided
= 1;
4027 /* If requested, replace the accessible part of the buffer
4028 with the file contents. Avoid replacing text at the
4029 beginning or end of the buffer that matches the file contents;
4030 that preserves markers pointing to the unchanged parts.
4032 Here we implement this feature in an optimized way
4033 for the case where code conversion is NOT needed.
4034 The following if-statement handles the case of conversion
4035 in a less optimal way.
4037 If the code conversion is "automatic" then we try using this
4038 method and hope for the best.
4039 But if we discover the need for conversion, we give up on this method
4040 and let the following if-statement handle the replace job. */
4043 && !(coding
.common_flags
& CODING_REQUIRE_DECODING_MASK
))
4045 /* same_at_start and same_at_end count bytes,
4046 because file access counts bytes
4047 and BEG and END count bytes. */
4048 int same_at_start
= BEGV_BYTE
;
4049 int same_at_end
= ZV_BYTE
;
4051 /* There is still a possibility we will find the need to do code
4052 conversion. If that happens, we set this variable to 1 to
4053 give up on handling REPLACE in the optimized way. */
4054 int giveup_match_end
= 0;
4056 if (XINT (beg
) != 0)
4058 if (lseek (fd
, XINT (beg
), 0) < 0)
4059 report_file_error ("Setting file position",
4060 Fcons (orig_filename
, Qnil
));
4065 /* Count how many chars at the start of the file
4066 match the text at the beginning of the buffer. */
4071 nread
= emacs_read (fd
, buffer
, sizeof buffer
);
4073 error ("IO error reading %s: %s",
4074 SDATA (orig_filename
), emacs_strerror (errno
));
4075 else if (nread
== 0)
4078 if (coding
.type
== coding_type_undecided
)
4079 detect_coding (&coding
, buffer
, nread
);
4080 if (coding
.common_flags
& CODING_REQUIRE_DECODING_MASK
)
4081 /* We found that the file should be decoded somehow.
4082 Let's give up here. */
4084 giveup_match_end
= 1;
4088 if (coding
.eol_type
== CODING_EOL_UNDECIDED
)
4089 detect_eol (&coding
, buffer
, nread
);
4090 if (coding
.eol_type
!= CODING_EOL_UNDECIDED
4091 && coding
.eol_type
!= CODING_EOL_LF
)
4092 /* We found that the format of eol should be decoded.
4093 Let's give up here. */
4095 giveup_match_end
= 1;
4100 while (bufpos
< nread
&& same_at_start
< ZV_BYTE
4101 && FETCH_BYTE (same_at_start
) == buffer
[bufpos
])
4102 same_at_start
++, bufpos
++;
4103 /* If we found a discrepancy, stop the scan.
4104 Otherwise loop around and scan the next bufferful. */
4105 if (bufpos
!= nread
)
4109 /* If the file matches the buffer completely,
4110 there's no need to replace anything. */
4111 if (same_at_start
- BEGV_BYTE
== XINT (end
))
4115 /* Truncate the buffer to the size of the file. */
4116 del_range_1 (same_at_start
, same_at_end
, 0, 0);
4121 /* Count how many chars at the end of the file
4122 match the text at the end of the buffer. But, if we have
4123 already found that decoding is necessary, don't waste time. */
4124 while (!giveup_match_end
)
4126 int total_read
, nread
, bufpos
, curpos
, trial
;
4128 /* At what file position are we now scanning? */
4129 curpos
= XINT (end
) - (ZV_BYTE
- same_at_end
);
4130 /* If the entire file matches the buffer tail, stop the scan. */
4133 /* How much can we scan in the next step? */
4134 trial
= min (curpos
, sizeof buffer
);
4135 if (lseek (fd
, curpos
- trial
, 0) < 0)
4136 report_file_error ("Setting file position",
4137 Fcons (orig_filename
, Qnil
));
4139 total_read
= nread
= 0;
4140 while (total_read
< trial
)
4142 nread
= emacs_read (fd
, buffer
+ total_read
, trial
- total_read
);
4144 error ("IO error reading %s: %s",
4145 SDATA (orig_filename
), emacs_strerror (errno
));
4146 else if (nread
== 0)
4148 total_read
+= nread
;
4151 /* Scan this bufferful from the end, comparing with
4152 the Emacs buffer. */
4153 bufpos
= total_read
;
4155 /* Compare with same_at_start to avoid counting some buffer text
4156 as matching both at the file's beginning and at the end. */
4157 while (bufpos
> 0 && same_at_end
> same_at_start
4158 && FETCH_BYTE (same_at_end
- 1) == buffer
[bufpos
- 1])
4159 same_at_end
--, bufpos
--;
4161 /* If we found a discrepancy, stop the scan.
4162 Otherwise loop around and scan the preceding bufferful. */
4165 /* If this discrepancy is because of code conversion,
4166 we cannot use this method; giveup and try the other. */
4167 if (same_at_end
> same_at_start
4168 && FETCH_BYTE (same_at_end
- 1) >= 0200
4169 && ! NILP (current_buffer
->enable_multibyte_characters
)
4170 && (CODING_MAY_REQUIRE_DECODING (&coding
)))
4171 giveup_match_end
= 1;
4180 if (! giveup_match_end
)
4184 /* We win! We can handle REPLACE the optimized way. */
4186 /* Extend the start of non-matching text area to multibyte
4187 character boundary. */
4188 if (! NILP (current_buffer
->enable_multibyte_characters
))
4189 while (same_at_start
> BEGV_BYTE
4190 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start
)))
4193 /* Extend the end of non-matching text area to multibyte
4194 character boundary. */
4195 if (! NILP (current_buffer
->enable_multibyte_characters
))
4196 while (same_at_end
< ZV_BYTE
4197 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end
)))
4200 /* Don't try to reuse the same piece of text twice. */
4201 overlap
= (same_at_start
- BEGV_BYTE
4202 - (same_at_end
+ st
.st_size
- ZV
));
4204 same_at_end
+= overlap
;
4206 /* Arrange to read only the nonmatching middle part of the file. */
4207 XSETFASTINT (beg
, XINT (beg
) + (same_at_start
- BEGV_BYTE
));
4208 XSETFASTINT (end
, XINT (end
) - (ZV_BYTE
- same_at_end
));
4210 del_range_byte (same_at_start
, same_at_end
, 0);
4211 /* Insert from the file at the proper position. */
4212 temp
= BYTE_TO_CHAR (same_at_start
);
4213 SET_PT_BOTH (temp
, same_at_start
);
4215 /* If display currently starts at beginning of line,
4216 keep it that way. */
4217 if (XBUFFER (XWINDOW (selected_window
)->buffer
) == current_buffer
)
4218 XWINDOW (selected_window
)->start_at_line_beg
= Fbolp ();
4220 replace_handled
= 1;
4224 /* If requested, replace the accessible part of the buffer
4225 with the file contents. Avoid replacing text at the
4226 beginning or end of the buffer that matches the file contents;
4227 that preserves markers pointing to the unchanged parts.
4229 Here we implement this feature for the case where code conversion
4230 is needed, in a simple way that needs a lot of memory.
4231 The preceding if-statement handles the case of no conversion
4232 in a more optimized way. */
4233 if (!NILP (replace
) && ! replace_handled
&& BEGV
< ZV
)
4235 int same_at_start
= BEGV_BYTE
;
4236 int same_at_end
= ZV_BYTE
;
4239 /* Make sure that the gap is large enough. */
4240 int bufsize
= 2 * st
.st_size
;
4241 unsigned char *conversion_buffer
= (unsigned char *) xmalloc (bufsize
);
4244 /* First read the whole file, performing code conversion into
4245 CONVERSION_BUFFER. */
4247 if (lseek (fd
, XINT (beg
), 0) < 0)
4249 xfree (conversion_buffer
);
4250 report_file_error ("Setting file position",
4251 Fcons (orig_filename
, Qnil
));
4254 total
= st
.st_size
; /* Total bytes in the file. */
4255 how_much
= 0; /* Bytes read from file so far. */
4256 inserted
= 0; /* Bytes put into CONVERSION_BUFFER so far. */
4257 unprocessed
= 0; /* Bytes not processed in previous loop. */
4259 while (how_much
< total
)
4261 /* try is reserved in some compilers (Microsoft C) */
4262 int trytry
= min (total
- how_much
, READ_BUF_SIZE
- unprocessed
);
4263 unsigned char *destination
= read_buf
+ unprocessed
;
4266 /* Allow quitting out of the actual I/O. */
4269 this = emacs_read (fd
, destination
, trytry
);
4272 if (this < 0 || this + unprocessed
== 0)
4280 if (CODING_MAY_REQUIRE_DECODING (&coding
))
4282 int require
, result
;
4284 this += unprocessed
;
4286 /* If we are using more space than estimated,
4287 make CONVERSION_BUFFER bigger. */
4288 require
= decoding_buffer_size (&coding
, this);
4289 if (inserted
+ require
+ 2 * (total
- how_much
) > bufsize
)
4291 bufsize
= inserted
+ require
+ 2 * (total
- how_much
);
4292 conversion_buffer
= (unsigned char *) xrealloc (conversion_buffer
, bufsize
);
4295 /* Convert this batch with results in CONVERSION_BUFFER. */
4296 if (how_much
>= total
) /* This is the last block. */
4297 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
4298 if (coding
.composing
!= COMPOSITION_DISABLED
)
4299 coding_allocate_composition_data (&coding
, BEGV
);
4300 result
= decode_coding (&coding
, read_buf
,
4301 conversion_buffer
+ inserted
,
4302 this, bufsize
- inserted
);
4304 /* Save for next iteration whatever we didn't convert. */
4305 unprocessed
= this - coding
.consumed
;
4306 bcopy (read_buf
+ coding
.consumed
, read_buf
, unprocessed
);
4307 if (!NILP (current_buffer
->enable_multibyte_characters
))
4308 this = coding
.produced
;
4310 this = str_as_unibyte (conversion_buffer
+ inserted
,
4317 /* At this point, INSERTED is how many characters (i.e. bytes)
4318 are present in CONVERSION_BUFFER.
4319 HOW_MUCH should equal TOTAL,
4320 or should be <= 0 if we couldn't read the file. */
4324 xfree (conversion_buffer
);
4325 coding_free_composition_data (&coding
);
4326 error ("IO error reading %s: %s",
4327 SDATA (orig_filename
), emacs_strerror (errno
));
4330 /* Compare the beginning of the converted file
4331 with the buffer text. */
4334 while (bufpos
< inserted
&& same_at_start
< same_at_end
4335 && FETCH_BYTE (same_at_start
) == conversion_buffer
[bufpos
])
4336 same_at_start
++, bufpos
++;
4338 /* If the file matches the buffer completely,
4339 there's no need to replace anything. */
4341 if (bufpos
== inserted
)
4343 xfree (conversion_buffer
);
4344 coding_free_composition_data (&coding
);
4347 /* Truncate the buffer to the size of the file. */
4348 del_range_byte (same_at_start
, same_at_end
, 0);
4353 /* Extend the start of non-matching text area to multibyte
4354 character boundary. */
4355 if (! NILP (current_buffer
->enable_multibyte_characters
))
4356 while (same_at_start
> BEGV_BYTE
4357 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_start
)))
4360 /* Scan this bufferful from the end, comparing with
4361 the Emacs buffer. */
4364 /* Compare with same_at_start to avoid counting some buffer text
4365 as matching both at the file's beginning and at the end. */
4366 while (bufpos
> 0 && same_at_end
> same_at_start
4367 && FETCH_BYTE (same_at_end
- 1) == conversion_buffer
[bufpos
- 1])
4368 same_at_end
--, bufpos
--;
4370 /* Extend the end of non-matching text area to multibyte
4371 character boundary. */
4372 if (! NILP (current_buffer
->enable_multibyte_characters
))
4373 while (same_at_end
< ZV_BYTE
4374 && ! CHAR_HEAD_P (FETCH_BYTE (same_at_end
)))
4377 /* Don't try to reuse the same piece of text twice. */
4378 overlap
= same_at_start
- BEGV_BYTE
- (same_at_end
+ inserted
- ZV_BYTE
);
4380 same_at_end
+= overlap
;
4382 /* If display currently starts at beginning of line,
4383 keep it that way. */
4384 if (XBUFFER (XWINDOW (selected_window
)->buffer
) == current_buffer
)
4385 XWINDOW (selected_window
)->start_at_line_beg
= Fbolp ();
4387 /* Replace the chars that we need to replace,
4388 and update INSERTED to equal the number of bytes
4389 we are taking from the file. */
4390 inserted
-= (ZV_BYTE
- same_at_end
) + (same_at_start
- BEGV_BYTE
);
4392 if (same_at_end
!= same_at_start
)
4394 del_range_byte (same_at_start
, same_at_end
, 0);
4396 same_at_start
= GPT_BYTE
;
4400 temp
= BYTE_TO_CHAR (same_at_start
);
4402 /* Insert from the file at the proper position. */
4403 SET_PT_BOTH (temp
, same_at_start
);
4404 insert_1 (conversion_buffer
+ same_at_start
- BEGV_BYTE
, inserted
,
4406 if (coding
.cmp_data
&& coding
.cmp_data
->used
)
4407 coding_restore_composition (&coding
, Fcurrent_buffer ());
4408 coding_free_composition_data (&coding
);
4410 /* Set `inserted' to the number of inserted characters. */
4411 inserted
= PT
- temp
;
4412 /* Set point before the inserted characters. */
4413 SET_PT_BOTH (temp
, same_at_start
);
4415 xfree (conversion_buffer
);
4424 register Lisp_Object temp
;
4426 total
= XINT (end
) - XINT (beg
);
4428 /* Make sure point-max won't overflow after this insertion. */
4429 XSETINT (temp
, total
);
4430 if (total
!= XINT (temp
))
4431 error ("Maximum buffer size exceeded");
4434 /* For a special file, all we can do is guess. */
4435 total
= READ_BUF_SIZE
;
4437 if (NILP (visit
) && inserted
> 0)
4439 #ifdef CLASH_DETECTION
4440 if (!NILP (current_buffer
->file_truename
)
4441 /* Make binding buffer-file-name to nil effective. */
4442 && !NILP (current_buffer
->filename
)
4443 && SAVE_MODIFF
>= MODIFF
)
4445 #endif /* CLASH_DETECTION */
4446 prepare_to_modify_buffer (GPT
, GPT
, NULL
);
4450 if (GAP_SIZE
< total
)
4451 make_gap (total
- GAP_SIZE
);
4453 if (XINT (beg
) != 0 || !NILP (replace
))
4455 if (lseek (fd
, XINT (beg
), 0) < 0)
4456 report_file_error ("Setting file position",
4457 Fcons (orig_filename
, Qnil
));
4460 /* In the following loop, HOW_MUCH contains the total bytes read so
4461 far for a regular file, and not changed for a special file. But,
4462 before exiting the loop, it is set to a negative value if I/O
4466 /* Total bytes inserted. */
4469 /* Here, we don't do code conversion in the loop. It is done by
4470 code_convert_region after all data are read into the buffer. */
4472 int gap_size
= GAP_SIZE
;
4474 while (how_much
< total
)
4476 /* try is reserved in some compilers (Microsoft C) */
4477 int trytry
= min (total
- how_much
, READ_BUF_SIZE
);
4484 /* Maybe make more room. */
4485 if (gap_size
< trytry
)
4487 make_gap (total
- gap_size
);
4488 gap_size
= GAP_SIZE
;
4491 /* Read from the file, capturing `quit'. When an
4492 error occurs, end the loop, and arrange for a quit
4493 to be signaled after decoding the text we read. */
4494 non_regular_fd
= fd
;
4495 non_regular_inserted
= inserted
;
4496 non_regular_nbytes
= trytry
;
4497 val
= internal_condition_case_1 (read_non_regular
, Qnil
, Qerror
,
4498 read_non_regular_quit
);
4509 /* Allow quitting out of the actual I/O. We don't make text
4510 part of the buffer until all the reading is done, so a C-g
4511 here doesn't do any harm. */
4514 this = emacs_read (fd
, BEG_ADDR
+ PT_BYTE
- BEG_BYTE
+ inserted
, trytry
);
4526 /* For a regular file, where TOTAL is the real size,
4527 count HOW_MUCH to compare with it.
4528 For a special file, where TOTAL is just a buffer size,
4529 so don't bother counting in HOW_MUCH.
4530 (INSERTED is where we count the number of characters inserted.) */
4537 /* Now we have read all the file data into the gap.
4538 If it was empty, undo marking the buffer modified. */
4542 #ifdef CLASH_DETECTION
4544 unlock_file (current_buffer
->file_truename
);
4546 Vdeactivate_mark
= old_Vdeactivate_mark
;
4549 Vdeactivate_mark
= Qt
;
4551 /* Make the text read part of the buffer. */
4552 GAP_SIZE
-= inserted
;
4554 GPT_BYTE
+= inserted
;
4556 ZV_BYTE
+= inserted
;
4561 /* Put an anchor to ensure multi-byte form ends at gap. */
4566 /* Discard the unwind protect for closing the file. */
4570 error ("IO error reading %s: %s",
4571 SDATA (orig_filename
), emacs_strerror (errno
));
4575 if (! coding_system_decided
)
4577 /* The coding system is not yet decided. Decide it by an
4578 optimized method for handling `coding:' tag.
4580 Note that we can get here only if the buffer was empty
4581 before the insertion. */
4585 if (!NILP (Vcoding_system_for_read
))
4586 val
= Vcoding_system_for_read
;
4589 /* Since we are sure that the current buffer was empty
4590 before the insertion, we can toggle
4591 enable-multibyte-characters directly here without taking
4592 care of marker adjustment and byte combining problem. By
4593 this way, we can run Lisp program safely before decoding
4594 the inserted text. */
4595 Lisp_Object unwind_data
;
4596 int count
= SPECPDL_INDEX ();
4598 unwind_data
= Fcons (current_buffer
->enable_multibyte_characters
,
4599 Fcons (current_buffer
->undo_list
,
4600 Fcurrent_buffer ()));
4601 current_buffer
->enable_multibyte_characters
= Qnil
;
4602 current_buffer
->undo_list
= Qt
;
4603 record_unwind_protect (decide_coding_unwind
, unwind_data
);
4605 if (inserted
> 0 && ! NILP (Vset_auto_coding_function
))
4607 val
= call2 (Vset_auto_coding_function
,
4608 filename
, make_number (inserted
));
4613 /* If the coding system is not yet decided, check
4614 file-coding-system-alist. */
4615 Lisp_Object args
[6], coding_systems
;
4617 args
[0] = Qinsert_file_contents
, args
[1] = orig_filename
;
4618 args
[2] = visit
, args
[3] = beg
, args
[4] = end
, args
[5] = Qnil
;
4619 coding_systems
= Ffind_operation_coding_system (6, args
);
4620 if (CONSP (coding_systems
))
4621 val
= XCAR (coding_systems
);
4623 unbind_to (count
, Qnil
);
4624 inserted
= Z_BYTE
- BEG_BYTE
;
4627 /* The following kludgy code is to avoid some compiler bug.
4629 setup_coding_system (val, &coding);
4632 struct coding_system temp_coding
;
4633 setup_coding_system (Fcheck_coding_system (val
), &temp_coding
);
4634 bcopy (&temp_coding
, &coding
, sizeof coding
);
4636 /* Ensure we set Vlast_coding_system_used. */
4637 set_coding_system
= 1;
4639 if (NILP (current_buffer
->enable_multibyte_characters
)
4641 /* We must suppress all character code conversion except for
4642 end-of-line conversion. */
4643 setup_raw_text_coding_system (&coding
);
4644 coding
.src_multibyte
= 0;
4645 coding
.dst_multibyte
4646 = !NILP (current_buffer
->enable_multibyte_characters
);
4650 /* Can't do this if part of the buffer might be preserved. */
4652 && (coding
.type
== coding_type_no_conversion
4653 || coding
.type
== coding_type_raw_text
))
4655 /* Visiting a file with these coding system makes the buffer
4657 current_buffer
->enable_multibyte_characters
= Qnil
;
4658 coding
.dst_multibyte
= 0;
4661 if (inserted
> 0 || coding
.type
== coding_type_ccl
)
4663 if (CODING_MAY_REQUIRE_DECODING (&coding
))
4665 code_convert_region (PT
, PT_BYTE
, PT
+ inserted
, PT_BYTE
+ inserted
,
4667 inserted
= coding
.produced_char
;
4670 adjust_after_insert (PT
, PT_BYTE
, PT
+ inserted
, PT_BYTE
+ inserted
,
4674 /* Now INSERTED is measured in characters. */
4677 /* Use the conversion type to determine buffer-file-type
4678 (find-buffer-file-type is now used to help determine the
4680 if ((coding
.eol_type
== CODING_EOL_UNDECIDED
4681 || coding
.eol_type
== CODING_EOL_LF
)
4682 && ! CODING_REQUIRE_DECODING (&coding
))
4683 current_buffer
->buffer_file_type
= Qt
;
4685 current_buffer
->buffer_file_type
= Qnil
;
4692 if (!EQ (current_buffer
->undo_list
, Qt
))
4693 current_buffer
->undo_list
= Qnil
;
4695 stat (SDATA (filename
), &st
);
4700 current_buffer
->modtime
= st
.st_mtime
;
4701 current_buffer
->filename
= orig_filename
;
4704 SAVE_MODIFF
= MODIFF
;
4705 current_buffer
->auto_save_modified
= MODIFF
;
4706 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
4707 #ifdef CLASH_DETECTION
4710 if (!NILP (current_buffer
->file_truename
))
4711 unlock_file (current_buffer
->file_truename
);
4712 unlock_file (filename
);
4714 #endif /* CLASH_DETECTION */
4716 Fsignal (Qfile_error
,
4717 Fcons (build_string ("not a regular file"),
4718 Fcons (orig_filename
, Qnil
)));
4721 if (set_coding_system
)
4722 Vlast_coding_system_used
= coding
.symbol
;
4724 if (! NILP (Ffboundp (Qafter_insert_file_set_coding
)))
4726 insval
= call2 (Qafter_insert_file_set_coding
, make_number (inserted
),
4728 if (! NILP (insval
))
4730 CHECK_NUMBER (insval
);
4731 inserted
= XFASTINT (insval
);
4735 /* Decode file format */
4738 int empty_undo_list_p
= 0;
4740 /* If we're anyway going to discard undo information, don't
4741 record it in the first place. The buffer's undo list at this
4742 point is either nil or t when visiting a file. */
4745 empty_undo_list_p
= NILP (current_buffer
->undo_list
);
4746 current_buffer
->undo_list
= Qt
;
4749 insval
= call3 (Qformat_decode
,
4750 Qnil
, make_number (inserted
), visit
);
4751 CHECK_NUMBER (insval
);
4752 inserted
= XFASTINT (insval
);
4755 current_buffer
->undo_list
= empty_undo_list_p
? Qnil
: Qt
;
4758 /* Call after-change hooks for the inserted text, aside from the case
4759 of normal visiting (not with REPLACE), which is done in a new buffer
4760 "before" the buffer is changed. */
4761 if (inserted
> 0 && total
> 0
4762 && (NILP (visit
) || !NILP (replace
)))
4764 signal_after_change (PT
, 0, inserted
);
4765 update_compositions (PT
, PT
, CHECK_BORDER
);
4768 p
= Vafter_insert_file_functions
;
4771 insval
= call1 (XCAR (p
), make_number (inserted
));
4774 CHECK_NUMBER (insval
);
4775 inserted
= XFASTINT (insval
);
4782 && current_buffer
->modtime
== -1)
4784 /* If visiting nonexistent file, return nil. */
4785 report_file_error ("Opening input file", Fcons (orig_filename
, Qnil
));
4789 Fsignal (Qquit
, Qnil
);
4791 /* ??? Retval needs to be dealt with in all cases consistently. */
4793 val
= Fcons (orig_filename
,
4794 Fcons (make_number (inserted
),
4797 RETURN_UNGCPRO (unbind_to (count
, val
));
4800 static Lisp_Object build_annotations
P_ ((Lisp_Object
, Lisp_Object
));
4801 static Lisp_Object build_annotations_2
P_ ((Lisp_Object
, Lisp_Object
,
4802 Lisp_Object
, Lisp_Object
));
4804 /* If build_annotations switched buffers, switch back to BUF.
4805 Kill the temporary buffer that was selected in the meantime.
4807 Since this kill only the last temporary buffer, some buffers remain
4808 not killed if build_annotations switched buffers more than once.
4812 build_annotations_unwind (buf
)
4817 if (XBUFFER (buf
) == current_buffer
)
4819 tembuf
= Fcurrent_buffer ();
4821 Fkill_buffer (tembuf
);
4825 /* Decide the coding-system to encode the data with. */
4828 choose_write_coding_system (start
, end
, filename
,
4829 append
, visit
, lockname
, coding
)
4830 Lisp_Object start
, end
, filename
, append
, visit
, lockname
;
4831 struct coding_system
*coding
;
4836 && NILP (Fstring_equal (current_buffer
->filename
,
4837 current_buffer
->auto_save_file_name
)))
4839 /* We use emacs-mule for auto saving... */
4840 setup_coding_system (Qemacs_mule
, coding
);
4841 /* ... but with the special flag to indicate not to strip off
4842 leading code of eight-bit-control chars. */
4844 goto done_setup_coding
;
4846 else if (!NILP (Vcoding_system_for_write
))
4848 val
= Vcoding_system_for_write
;
4849 if (coding_system_require_warning
4850 && !NILP (Ffboundp (Vselect_safe_coding_system_function
)))
4851 /* Confirm that VAL can surely encode the current region. */
4852 val
= call5 (Vselect_safe_coding_system_function
,
4853 start
, end
, Fcons (Qt
, Fcons (val
, Qnil
)),
4858 /* If the variable `buffer-file-coding-system' is set locally,
4859 it means that the file was read with some kind of code
4860 conversion or the variable is explicitly set by users. We
4861 had better write it out with the same coding system even if
4862 `enable-multibyte-characters' is nil.
4864 If it is not set locally, we anyway have to convert EOL
4865 format if the default value of `buffer-file-coding-system'
4866 tells that it is not Unix-like (LF only) format. */
4867 int using_default_coding
= 0;
4868 int force_raw_text
= 0;
4870 val
= current_buffer
->buffer_file_coding_system
;
4872 || NILP (Flocal_variable_p (Qbuffer_file_coding_system
, Qnil
)))
4875 if (NILP (current_buffer
->enable_multibyte_characters
))
4881 /* Check file-coding-system-alist. */
4882 Lisp_Object args
[7], coding_systems
;
4884 args
[0] = Qwrite_region
; args
[1] = start
; args
[2] = end
;
4885 args
[3] = filename
; args
[4] = append
; args
[5] = visit
;
4887 coding_systems
= Ffind_operation_coding_system (7, args
);
4888 if (CONSP (coding_systems
) && !NILP (XCDR (coding_systems
)))
4889 val
= XCDR (coding_systems
);
4893 && !NILP (current_buffer
->buffer_file_coding_system
))
4895 /* If we still have not decided a coding system, use the
4896 default value of buffer-file-coding-system. */
4897 val
= current_buffer
->buffer_file_coding_system
;
4898 using_default_coding
= 1;
4902 && !NILP (Ffboundp (Vselect_safe_coding_system_function
)))
4903 /* Confirm that VAL can surely encode the current region. */
4904 val
= call5 (Vselect_safe_coding_system_function
,
4905 start
, end
, val
, Qnil
, filename
);
4907 setup_coding_system (Fcheck_coding_system (val
), coding
);
4908 if (coding
->eol_type
== CODING_EOL_UNDECIDED
4909 && !using_default_coding
)
4911 if (! EQ (default_buffer_file_coding
.symbol
,
4912 buffer_defaults
.buffer_file_coding_system
))
4913 setup_coding_system (buffer_defaults
.buffer_file_coding_system
,
4914 &default_buffer_file_coding
);
4915 if (default_buffer_file_coding
.eol_type
!= CODING_EOL_UNDECIDED
)
4917 Lisp_Object subsidiaries
;
4919 coding
->eol_type
= default_buffer_file_coding
.eol_type
;
4920 subsidiaries
= Fget (coding
->symbol
, Qeol_type
);
4921 if (VECTORP (subsidiaries
)
4922 && XVECTOR (subsidiaries
)->size
== 3)
4924 = XVECTOR (subsidiaries
)->contents
[coding
->eol_type
];
4929 setup_raw_text_coding_system (coding
);
4930 goto done_setup_coding
;
4933 setup_coding_system (Fcheck_coding_system (val
), coding
);
4936 if (coding
->eol_type
== CODING_EOL_UNDECIDED
)
4937 coding
->eol_type
= system_eol_type
;
4938 if (!STRINGP (start
) && !NILP (current_buffer
->selective_display
))
4939 coding
->mode
|= CODING_MODE_SELECTIVE_DISPLAY
;
4942 DEFUN ("write-region", Fwrite_region
, Swrite_region
, 3, 7,
4943 "r\nFWrite region to file: \ni\ni\ni\np",
4944 doc
: /* Write current region into specified file.
4945 When called from a program, requires three arguments:
4946 START, END and FILENAME. START and END are normally buffer positions
4947 specifying the part of the buffer to write.
4948 If START is nil, that means to use the entire buffer contents.
4949 If START is a string, then output that string to the file
4950 instead of any buffer contents; END is ignored.
4952 Optional fourth argument APPEND if non-nil means
4953 append to existing file contents (if any). If it is an integer,
4954 seek to that offset in the file before writing.
4955 Optional fifth argument VISIT, if t or a string, means
4956 set the last-save-file-modtime of buffer to this file's modtime
4957 and mark buffer not modified.
4958 If VISIT is a string, it is a second file name;
4959 the output goes to FILENAME, but the buffer is marked as visiting VISIT.
4960 VISIT is also the file name to lock and unlock for clash detection.
4961 If VISIT is neither t nor nil nor a string,
4962 that means do not display the \"Wrote file\" message.
4963 The optional sixth arg LOCKNAME, if non-nil, specifies the name to
4964 use for locking and unlocking, overriding FILENAME and VISIT.
4965 The optional seventh arg MUSTBENEW, if non-nil, insists on a check
4966 for an existing file with the same name. If MUSTBENEW is `excl',
4967 that means to get an error if the file already exists; never overwrite.
4968 If MUSTBENEW is neither nil nor `excl', that means ask for
4969 confirmation before overwriting, but do go ahead and overwrite the file
4970 if the user confirms.
4972 This does code conversion according to the value of
4973 `coding-system-for-write', `buffer-file-coding-system', or
4974 `file-coding-system-alist', and sets the variable
4975 `last-coding-system-used' to the coding system actually used. */)
4976 (start
, end
, filename
, append
, visit
, lockname
, mustbenew
)
4977 Lisp_Object start
, end
, filename
, append
, visit
, lockname
, mustbenew
;
4982 const unsigned char *fn
;
4985 int count
= SPECPDL_INDEX ();
4988 unsigned char *fname
= 0; /* If non-0, original filename (must rename) */
4990 Lisp_Object handler
;
4991 Lisp_Object visit_file
;
4992 Lisp_Object annotations
;
4993 Lisp_Object encoded_filename
;
4994 int visiting
= (EQ (visit
, Qt
) || STRINGP (visit
));
4995 int quietly
= !NILP (visit
);
4996 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
4997 struct buffer
*given_buffer
;
4999 int buffer_file_type
= O_BINARY
;
5001 struct coding_system coding
;
5003 if (current_buffer
->base_buffer
&& visiting
)
5004 error ("Cannot do file visiting in an indirect buffer");
5006 if (!NILP (start
) && !STRINGP (start
))
5007 validate_region (&start
, &end
);
5010 GCPRO5 (start
, filename
, visit
, visit_file
, lockname
);
5012 filename
= Fexpand_file_name (filename
, Qnil
);
5014 if (!NILP (mustbenew
) && !EQ (mustbenew
, Qexcl
))
5015 barf_or_query_if_file_exists (filename
, "overwrite", 1, 0, 1);
5017 if (STRINGP (visit
))
5018 visit_file
= Fexpand_file_name (visit
, Qnil
);
5020 visit_file
= filename
;
5022 if (NILP (lockname
))
5023 lockname
= visit_file
;
5027 /* If the file name has special constructs in it,
5028 call the corresponding file handler. */
5029 handler
= Ffind_file_name_handler (filename
, Qwrite_region
);
5030 /* If FILENAME has no handler, see if VISIT has one. */
5031 if (NILP (handler
) && STRINGP (visit
))
5032 handler
= Ffind_file_name_handler (visit
, Qwrite_region
);
5034 if (!NILP (handler
))
5037 val
= call6 (handler
, Qwrite_region
, start
, end
,
5038 filename
, append
, visit
);
5042 SAVE_MODIFF
= MODIFF
;
5043 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
5044 current_buffer
->filename
= visit_file
;
5050 record_unwind_protect (save_restriction_restore
, save_restriction_save ());
5052 /* Special kludge to simplify auto-saving. */
5055 XSETFASTINT (start
, BEG
);
5056 XSETFASTINT (end
, Z
);
5060 record_unwind_protect (build_annotations_unwind
, Fcurrent_buffer ());
5061 count1
= SPECPDL_INDEX ();
5063 given_buffer
= current_buffer
;
5065 if (!STRINGP (start
))
5067 annotations
= build_annotations (start
, end
);
5069 if (current_buffer
!= given_buffer
)
5071 XSETFASTINT (start
, BEGV
);
5072 XSETFASTINT (end
, ZV
);
5078 GCPRO5 (start
, filename
, annotations
, visit_file
, lockname
);
5080 /* Decide the coding-system to encode the data with.
5081 We used to make this choice before calling build_annotations, but that
5082 leads to problems when a write-annotate-function takes care of
5083 unsavable chars (as was the case with X-Symbol). */
5084 choose_write_coding_system (start
, end
, filename
,
5085 append
, visit
, lockname
, &coding
);
5086 Vlast_coding_system_used
= coding
.symbol
;
5088 given_buffer
= current_buffer
;
5089 if (! STRINGP (start
))
5091 annotations
= build_annotations_2 (start
, end
,
5092 coding
.pre_write_conversion
, annotations
);
5093 if (current_buffer
!= given_buffer
)
5095 XSETFASTINT (start
, BEGV
);
5096 XSETFASTINT (end
, ZV
);
5100 #ifdef CLASH_DETECTION
5103 #if 0 /* This causes trouble for GNUS. */
5104 /* If we've locked this file for some other buffer,
5105 query before proceeding. */
5106 if (!visiting
&& EQ (Ffile_locked_p (lockname
), Qt
))
5107 call2 (intern ("ask-user-about-lock"), filename
, Vuser_login_name
);
5110 lock_file (lockname
);
5112 #endif /* CLASH_DETECTION */
5114 encoded_filename
= ENCODE_FILE (filename
);
5116 fn
= SDATA (encoded_filename
);
5120 desc
= emacs_open (fn
, O_WRONLY
| buffer_file_type
, 0);
5121 #else /* not DOS_NT */
5122 desc
= emacs_open (fn
, O_WRONLY
, 0);
5123 #endif /* not DOS_NT */
5125 if (desc
< 0 && (NILP (append
) || errno
== ENOENT
))
5127 if (auto_saving
) /* Overwrite any previous version of autosave file */
5129 vms_truncate (fn
); /* if fn exists, truncate to zero length */
5130 desc
= emacs_open (fn
, O_RDWR
, 0);
5132 desc
= creat_copy_attrs (STRINGP (current_buffer
->filename
)
5133 ? SDATA (current_buffer
->filename
) : 0,
5136 else /* Write to temporary name and rename if no errors */
5138 Lisp_Object temp_name
;
5139 temp_name
= Ffile_name_directory (filename
);
5141 if (!NILP (temp_name
))
5143 temp_name
= Fmake_temp_name (concat2 (temp_name
,
5144 build_string ("$$SAVE$$")));
5145 fname
= SDATA (filename
);
5146 fn
= SDATA (temp_name
);
5147 desc
= creat_copy_attrs (fname
, fn
);
5150 /* If we can't open the temporary file, try creating a new
5151 version of the original file. VMS "creat" creates a
5152 new version rather than truncating an existing file. */
5155 desc
= creat (fn
, 0666);
5156 #if 0 /* This can clobber an existing file and fail to replace it,
5157 if the user runs out of space. */
5160 /* We can't make a new version;
5161 try to truncate and rewrite existing version if any. */
5163 desc
= emacs_open (fn
, O_RDWR
, 0);
5169 desc
= creat (fn
, 0666);
5173 desc
= emacs_open (fn
,
5174 O_WRONLY
| O_CREAT
| buffer_file_type
5175 | (EQ (mustbenew
, Qexcl
) ? O_EXCL
: O_TRUNC
),
5176 S_IREAD
| S_IWRITE
);
5177 #else /* not DOS_NT */
5178 desc
= emacs_open (fn
, O_WRONLY
| O_TRUNC
| O_CREAT
5179 | (EQ (mustbenew
, Qexcl
) ? O_EXCL
: 0),
5180 auto_saving
? auto_save_mode_bits
: 0666);
5181 #endif /* not DOS_NT */
5182 #endif /* not VMS */
5186 #ifdef CLASH_DETECTION
5188 if (!auto_saving
) unlock_file (lockname
);
5190 #endif /* CLASH_DETECTION */
5192 report_file_error ("Opening output file", Fcons (filename
, Qnil
));
5195 record_unwind_protect (close_file_unwind
, make_number (desc
));
5197 if (!NILP (append
) && !NILP (Ffile_regular_p (filename
)))
5201 if (NUMBERP (append
))
5202 ret
= lseek (desc
, XINT (append
), 1);
5204 ret
= lseek (desc
, 0, 2);
5207 #ifdef CLASH_DETECTION
5208 if (!auto_saving
) unlock_file (lockname
);
5209 #endif /* CLASH_DETECTION */
5211 report_file_error ("Lseek error", Fcons (filename
, Qnil
));
5219 * Kludge Warning: The VMS C RTL likes to insert carriage returns
5220 * if we do writes that don't end with a carriage return. Furthermore
5221 * it cannot handle writes of more then 16K. The modified
5222 * version of "sys_write" in SYSDEP.C (see comment there) copes with
5223 * this EXCEPT for the last record (iff it doesn't end with a carriage
5224 * return). This implies that if your buffer doesn't end with a carriage
5225 * return, you get one free... tough. However it also means that if
5226 * we make two calls to sys_write (a la the following code) you can
5227 * get one at the gap as well. The easiest way to fix this (honest)
5228 * is to move the gap to the next newline (or the end of the buffer).
5233 if (GPT
> BEG
&& GPT_ADDR
[-1] != '\n')
5234 move_gap (find_next_newline (GPT
, 1));
5236 /* Whether VMS or not, we must move the gap to the next of newline
5237 when we must put designation sequences at beginning of line. */
5238 if (INTEGERP (start
)
5239 && coding
.type
== coding_type_iso2022
5240 && coding
.flags
& CODING_FLAG_ISO_DESIGNATE_AT_BOL
5241 && GPT
> BEG
&& GPT_ADDR
[-1] != '\n')
5243 int opoint
= PT
, opoint_byte
= PT_BYTE
;
5244 scan_newline (PT
, PT_BYTE
, ZV
, ZV_BYTE
, 1, 0);
5245 move_gap_both (PT
, PT_BYTE
);
5246 SET_PT_BOTH (opoint
, opoint_byte
);
5253 if (STRINGP (start
))
5255 failure
= 0 > a_write (desc
, start
, 0, SCHARS (start
),
5256 &annotations
, &coding
);
5259 else if (XINT (start
) != XINT (end
))
5261 tem
= CHAR_TO_BYTE (XINT (start
));
5263 if (XINT (start
) < GPT
)
5265 failure
= 0 > a_write (desc
, Qnil
, XINT (start
),
5266 min (GPT
, XINT (end
)) - XINT (start
),
5267 &annotations
, &coding
);
5271 if (XINT (end
) > GPT
&& !failure
)
5273 tem
= max (XINT (start
), GPT
);
5274 failure
= 0 > a_write (desc
, Qnil
, tem
, XINT (end
) - tem
,
5275 &annotations
, &coding
);
5281 /* If file was empty, still need to write the annotations */
5282 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
5283 failure
= 0 > a_write (desc
, Qnil
, XINT (end
), 0, &annotations
, &coding
);
5287 if (CODING_REQUIRE_FLUSHING (&coding
)
5288 && !(coding
.mode
& CODING_MODE_LAST_BLOCK
)
5291 /* We have to flush out a data. */
5292 coding
.mode
|= CODING_MODE_LAST_BLOCK
;
5293 failure
= 0 > e_write (desc
, Qnil
, 0, 0, &coding
);
5300 /* Note fsync appears to change the modtime on BSD4.2 (both vax and sun).
5301 Disk full in NFS may be reported here. */
5302 /* mib says that closing the file will try to write as fast as NFS can do
5303 it, and that means the fsync here is not crucial for autosave files. */
5304 if (!auto_saving
&& !write_region_inhibit_fsync
&& fsync (desc
) < 0)
5306 /* If fsync fails with EINTR, don't treat that as serious. */
5308 failure
= 1, save_errno
= errno
;
5312 /* Spurious "file has changed on disk" warnings have been
5313 observed on Suns as well.
5314 It seems that `close' can change the modtime, under nfs.
5316 (This has supposedly been fixed in Sunos 4,
5317 but who knows about all the other machines with NFS?) */
5320 /* On VMS and APOLLO, must do the stat after the close
5321 since closing changes the modtime. */
5324 /* Recall that #if defined does not work on VMS. */
5331 /* NFS can report a write failure now. */
5332 if (emacs_close (desc
) < 0)
5333 failure
= 1, save_errno
= errno
;
5336 /* If we wrote to a temporary name and had no errors, rename to real name. */
5340 failure
= (rename (fn
, fname
) != 0), save_errno
= errno
;
5348 /* Discard the unwind protect for close_file_unwind. */
5349 specpdl_ptr
= specpdl
+ count1
;
5350 /* Restore the original current buffer. */
5351 visit_file
= unbind_to (count
, visit_file
);
5353 #ifdef CLASH_DETECTION
5355 unlock_file (lockname
);
5356 #endif /* CLASH_DETECTION */
5358 /* Do this before reporting IO error
5359 to avoid a "file has changed on disk" warning on
5360 next attempt to save. */
5362 current_buffer
->modtime
= st
.st_mtime
;
5365 error ("IO error writing %s: %s", SDATA (filename
),
5366 emacs_strerror (save_errno
));
5370 SAVE_MODIFF
= MODIFF
;
5371 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
5372 current_buffer
->filename
= visit_file
;
5373 update_mode_lines
++;
5378 && ! NILP (Fstring_equal (current_buffer
->filename
,
5379 current_buffer
->auto_save_file_name
)))
5380 SAVE_MODIFF
= MODIFF
;
5386 message_with_string ((INTEGERP (append
)
5396 Lisp_Object
merge ();
5398 DEFUN ("car-less-than-car", Fcar_less_than_car
, Scar_less_than_car
, 2, 2, 0,
5399 doc
: /* Return t if (car A) is numerically less than (car B). */)
5403 return Flss (Fcar (a
), Fcar (b
));
5406 /* Build the complete list of annotations appropriate for writing out
5407 the text between START and END, by calling all the functions in
5408 write-region-annotate-functions and merging the lists they return.
5409 If one of these functions switches to a different buffer, we assume
5410 that buffer contains altered text. Therefore, the caller must
5411 make sure to restore the current buffer in all cases,
5412 as save-excursion would do. */
5415 build_annotations (start
, end
)
5416 Lisp_Object start
, end
;
5418 Lisp_Object annotations
;
5420 struct gcpro gcpro1
, gcpro2
;
5421 Lisp_Object original_buffer
;
5422 int i
, used_global
= 0;
5424 XSETBUFFER (original_buffer
, current_buffer
);
5427 p
= Vwrite_region_annotate_functions
;
5428 GCPRO2 (annotations
, p
);
5431 struct buffer
*given_buffer
= current_buffer
;
5432 if (EQ (Qt
, XCAR (p
)) && !used_global
)
5433 { /* Use the global value of the hook. */
5436 arg
[0] = Fdefault_value (Qwrite_region_annotate_functions
);
5438 p
= Fappend (2, arg
);
5441 Vwrite_region_annotations_so_far
= annotations
;
5442 res
= call2 (XCAR (p
), start
, end
);
5443 /* If the function makes a different buffer current,
5444 assume that means this buffer contains altered text to be output.
5445 Reset START and END from the buffer bounds
5446 and discard all previous annotations because they should have
5447 been dealt with by this function. */
5448 if (current_buffer
!= given_buffer
)
5450 XSETFASTINT (start
, BEGV
);
5451 XSETFASTINT (end
, ZV
);
5454 Flength (res
); /* Check basic validity of return value */
5455 annotations
= merge (annotations
, res
, Qcar_less_than_car
);
5459 /* Now do the same for annotation functions implied by the file-format */
5460 if (auto_saving
&& (!EQ (current_buffer
->auto_save_file_format
, Qt
)))
5461 p
= current_buffer
->auto_save_file_format
;
5463 p
= current_buffer
->file_format
;
5464 for (i
= 0; CONSP (p
); p
= XCDR (p
), ++i
)
5466 struct buffer
*given_buffer
= current_buffer
;
5468 Vwrite_region_annotations_so_far
= annotations
;
5470 /* Value is either a list of annotations or nil if the function
5471 has written annotations to a temporary buffer, which is now
5473 res
= call5 (Qformat_annotate_function
, XCAR (p
), start
, end
,
5474 original_buffer
, make_number (i
));
5475 if (current_buffer
!= given_buffer
)
5477 XSETFASTINT (start
, BEGV
);
5478 XSETFASTINT (end
, ZV
);
5483 annotations
= merge (annotations
, res
, Qcar_less_than_car
);
5491 build_annotations_2 (start
, end
, pre_write_conversion
, annotations
)
5492 Lisp_Object start
, end
, pre_write_conversion
, annotations
;
5494 struct gcpro gcpro1
;
5497 GCPRO1 (annotations
);
5498 /* At last, do the same for the function PRE_WRITE_CONVERSION
5499 implied by the current coding-system. */
5500 if (!NILP (pre_write_conversion
))
5502 struct buffer
*given_buffer
= current_buffer
;
5503 Vwrite_region_annotations_so_far
= annotations
;
5504 res
= call2 (pre_write_conversion
, start
, end
);
5506 annotations
= (current_buffer
!= given_buffer
5508 : merge (annotations
, res
, Qcar_less_than_car
));
5515 /* Write to descriptor DESC the NCHARS chars starting at POS of STRING.
5516 If STRING is nil, POS is the character position in the current buffer.
5517 Intersperse with them the annotations from *ANNOT
5518 which fall within the range of POS to POS + NCHARS,
5519 each at its appropriate position.
5521 We modify *ANNOT by discarding elements as we use them up.
5523 The return value is negative in case of system call failure. */
5526 a_write (desc
, string
, pos
, nchars
, annot
, coding
)
5529 register int nchars
;
5532 struct coding_system
*coding
;
5536 int lastpos
= pos
+ nchars
;
5538 while (NILP (*annot
) || CONSP (*annot
))
5540 tem
= Fcar_safe (Fcar (*annot
));
5543 nextpos
= XFASTINT (tem
);
5545 /* If there are no more annotations in this range,
5546 output the rest of the range all at once. */
5547 if (! (nextpos
>= pos
&& nextpos
<= lastpos
))
5548 return e_write (desc
, string
, pos
, lastpos
, coding
);
5550 /* Output buffer text up to the next annotation's position. */
5553 if (0 > e_write (desc
, string
, pos
, nextpos
, coding
))
5557 /* Output the annotation. */
5558 tem
= Fcdr (Fcar (*annot
));
5561 if (0 > e_write (desc
, tem
, 0, SCHARS (tem
), coding
))
5564 *annot
= Fcdr (*annot
);
5569 #ifndef WRITE_BUF_SIZE
5570 #define WRITE_BUF_SIZE (16 * 1024)
5573 /* Write text in the range START and END into descriptor DESC,
5574 encoding them with coding system CODING. If STRING is nil, START
5575 and END are character positions of the current buffer, else they
5576 are indexes to the string STRING. */
5579 e_write (desc
, string
, start
, end
, coding
)
5583 struct coding_system
*coding
;
5585 register char *addr
;
5586 register int nbytes
;
5587 char buf
[WRITE_BUF_SIZE
];
5591 coding
->composing
= COMPOSITION_DISABLED
;
5592 if (coding
->composing
!= COMPOSITION_DISABLED
)
5593 coding_save_composition (coding
, start
, end
, string
);
5595 if (STRINGP (string
))
5597 addr
= SDATA (string
);
5598 nbytes
= SBYTES (string
);
5599 coding
->src_multibyte
= STRING_MULTIBYTE (string
);
5601 else if (start
< end
)
5603 /* It is assured that the gap is not in the range START and END-1. */
5604 addr
= CHAR_POS_ADDR (start
);
5605 nbytes
= CHAR_TO_BYTE (end
) - CHAR_TO_BYTE (start
);
5606 coding
->src_multibyte
5607 = !NILP (current_buffer
->enable_multibyte_characters
);
5613 coding
->src_multibyte
= 1;
5616 /* We used to have a code for handling selective display here. But,
5617 now it is handled within encode_coding. */
5622 result
= encode_coding (coding
, addr
, buf
, nbytes
, WRITE_BUF_SIZE
);
5623 if (coding
->produced
> 0)
5625 coding
->produced
-= emacs_write (desc
, buf
, coding
->produced
);
5626 if (coding
->produced
)
5632 nbytes
-= coding
->consumed
;
5633 addr
+= coding
->consumed
;
5634 if (result
== CODING_FINISH_INSUFFICIENT_SRC
5637 /* The source text ends by an incomplete multibyte form.
5638 There's no way other than write it out as is. */
5639 nbytes
-= emacs_write (desc
, addr
, nbytes
);
5648 start
+= coding
->consumed_char
;
5649 if (coding
->cmp_data
)
5650 coding_adjust_composition_offset (coding
, start
);
5653 if (coding
->cmp_data
)
5654 coding_free_composition_data (coding
);
5659 DEFUN ("verify-visited-file-modtime", Fverify_visited_file_modtime
,
5660 Sverify_visited_file_modtime
, 1, 1, 0,
5661 doc
: /* Return t if last mod time of BUF's visited file matches what BUF records.
5662 This means that the file has not been changed since it was visited or saved.
5663 See Info node `(elisp)Modification Time' for more details. */)
5669 Lisp_Object handler
;
5670 Lisp_Object filename
;
5675 if (!STRINGP (b
->filename
)) return Qt
;
5676 if (b
->modtime
== 0) return Qt
;
5678 /* If the file name has special constructs in it,
5679 call the corresponding file handler. */
5680 handler
= Ffind_file_name_handler (b
->filename
,
5681 Qverify_visited_file_modtime
);
5682 if (!NILP (handler
))
5683 return call2 (handler
, Qverify_visited_file_modtime
, buf
);
5685 filename
= ENCODE_FILE (b
->filename
);
5687 if (stat (SDATA (filename
), &st
) < 0)
5689 /* If the file doesn't exist now and didn't exist before,
5690 we say that it isn't modified, provided the error is a tame one. */
5691 if (errno
== ENOENT
|| errno
== EACCES
|| errno
== ENOTDIR
)
5696 if (st
.st_mtime
== b
->modtime
5697 /* If both are positive, accept them if they are off by one second. */
5698 || (st
.st_mtime
> 0 && b
->modtime
> 0
5699 && (st
.st_mtime
== b
->modtime
+ 1
5700 || st
.st_mtime
== b
->modtime
- 1)))
5705 DEFUN ("clear-visited-file-modtime", Fclear_visited_file_modtime
,
5706 Sclear_visited_file_modtime
, 0, 0, 0,
5707 doc
: /* Clear out records of last mod time of visited file.
5708 Next attempt to save will certainly not complain of a discrepancy. */)
5711 current_buffer
->modtime
= 0;
5715 DEFUN ("visited-file-modtime", Fvisited_file_modtime
,
5716 Svisited_file_modtime
, 0, 0, 0,
5717 doc
: /* Return the current buffer's recorded visited file modification time.
5718 The value is a list of the form (HIGH LOW), like the time values
5719 that `file-attributes' returns. If the current buffer has no recorded
5720 file modification time, this function returns 0.
5721 See Info node `(elisp)Modification Time' for more details. */)
5725 tcons
= long_to_cons ((unsigned long) current_buffer
->modtime
);
5727 return list2 (XCAR (tcons
), XCDR (tcons
));
5731 DEFUN ("set-visited-file-modtime", Fset_visited_file_modtime
,
5732 Sset_visited_file_modtime
, 0, 1, 0,
5733 doc
: /* Update buffer's recorded modification time from the visited file's time.
5734 Useful if the buffer was not read from the file normally
5735 or if the file itself has been changed for some known benign reason.
5736 An argument specifies the modification time value to use
5737 \(instead of that of the visited file), in the form of a list
5738 \(HIGH . LOW) or (HIGH LOW). */)
5740 Lisp_Object time_list
;
5742 if (!NILP (time_list
))
5743 current_buffer
->modtime
= cons_to_long (time_list
);
5746 register Lisp_Object filename
;
5748 Lisp_Object handler
;
5750 filename
= Fexpand_file_name (current_buffer
->filename
, Qnil
);
5752 /* If the file name has special constructs in it,
5753 call the corresponding file handler. */
5754 handler
= Ffind_file_name_handler (filename
, Qset_visited_file_modtime
);
5755 if (!NILP (handler
))
5756 /* The handler can find the file name the same way we did. */
5757 return call2 (handler
, Qset_visited_file_modtime
, Qnil
);
5759 filename
= ENCODE_FILE (filename
);
5761 if (stat (SDATA (filename
), &st
) >= 0)
5762 current_buffer
->modtime
= st
.st_mtime
;
5769 auto_save_error (error
)
5772 Lisp_Object args
[3], msg
;
5774 struct gcpro gcpro1
;
5778 ring_bell (XFRAME (selected_frame
));
5780 args
[0] = build_string ("Auto-saving %s: %s");
5781 args
[1] = current_buffer
->name
;
5782 args
[2] = Ferror_message_string (error
);
5783 msg
= Fformat (3, args
);
5785 nbytes
= SBYTES (msg
);
5786 SAFE_ALLOCA (msgbuf
, char *, nbytes
);
5787 bcopy (SDATA (msg
), msgbuf
, nbytes
);
5789 for (i
= 0; i
< 3; ++i
)
5792 message2 (msgbuf
, nbytes
, STRING_MULTIBYTE (msg
));
5794 message2_nolog (msgbuf
, nbytes
, STRING_MULTIBYTE (msg
));
5795 Fsleep_for (make_number (1), Qnil
);
5809 auto_save_mode_bits
= 0666;
5811 /* Get visited file's mode to become the auto save file's mode. */
5812 if (! NILP (current_buffer
->filename
))
5814 if (stat (SDATA (current_buffer
->filename
), &st
) >= 0)
5815 /* But make sure we can overwrite it later! */
5816 auto_save_mode_bits
= st
.st_mode
| 0600;
5817 else if ((modes
= Ffile_modes (current_buffer
->filename
),
5819 /* Remote files don't cooperate with stat. */
5820 auto_save_mode_bits
= XINT (modes
) | 0600;
5824 Fwrite_region (Qnil
, Qnil
,
5825 current_buffer
->auto_save_file_name
,
5826 Qnil
, Qlambda
, Qnil
, Qnil
);
5830 do_auto_save_unwind (arg
) /* used as unwind-protect function */
5833 FILE *stream
= (FILE *) XSAVE_VALUE (arg
)->pointer
;
5841 do_auto_save_unwind_1 (value
) /* used as unwind-protect function */
5844 minibuffer_auto_raise
= XINT (value
);
5849 do_auto_save_make_dir (dir
)
5852 return call2 (Qmake_directory
, dir
, Qt
);
5856 do_auto_save_eh (ignore
)
5862 DEFUN ("do-auto-save", Fdo_auto_save
, Sdo_auto_save
, 0, 2, "",
5863 doc
: /* Auto-save all buffers that need it.
5864 This is all buffers that have auto-saving enabled
5865 and are changed since last auto-saved.
5866 Auto-saving writes the buffer into a file
5867 so that your editing is not lost if the system crashes.
5868 This file is not the file you visited; that changes only when you save.
5869 Normally we run the normal hook `auto-save-hook' before saving.
5871 A non-nil NO-MESSAGE argument means do not print any message if successful.
5872 A non-nil CURRENT-ONLY argument means save only current buffer. */)
5873 (no_message
, current_only
)
5874 Lisp_Object no_message
, current_only
;
5876 struct buffer
*old
= current_buffer
, *b
;
5877 Lisp_Object tail
, buf
;
5879 int do_handled_files
;
5881 FILE *stream
= NULL
;
5882 int count
= SPECPDL_INDEX ();
5883 int orig_minibuffer_auto_raise
= minibuffer_auto_raise
;
5884 int old_message_p
= 0;
5885 struct gcpro gcpro1
, gcpro2
;
5887 if (max_specpdl_size
< specpdl_size
+ 40)
5888 max_specpdl_size
= specpdl_size
+ 40;
5893 if (NILP (no_message
))
5895 old_message_p
= push_message ();
5896 record_unwind_protect (pop_message_unwind
, Qnil
);
5899 /* Ordinarily don't quit within this function,
5900 but don't make it impossible to quit (in case we get hung in I/O). */
5904 /* No GCPRO needed, because (when it matters) all Lisp_Object variables
5905 point to non-strings reached from Vbuffer_alist. */
5907 if (!NILP (Vrun_hooks
))
5908 call1 (Vrun_hooks
, intern ("auto-save-hook"));
5910 if (STRINGP (Vauto_save_list_file_name
))
5912 Lisp_Object listfile
;
5914 listfile
= Fexpand_file_name (Vauto_save_list_file_name
, Qnil
);
5916 /* Don't try to create the directory when shutting down Emacs,
5917 because creating the directory might signal an error, and
5918 that would leave Emacs in a strange state. */
5919 if (!NILP (Vrun_hooks
))
5923 GCPRO2 (dir
, listfile
);
5924 dir
= Ffile_name_directory (listfile
);
5925 if (NILP (Ffile_directory_p (dir
)))
5926 internal_condition_case_1 (do_auto_save_make_dir
,
5927 dir
, Fcons (Fcons (Qfile_error
, Qnil
), Qnil
),
5932 stream
= fopen (SDATA (listfile
), "w");
5935 record_unwind_protect (do_auto_save_unwind
,
5936 make_save_value (stream
, 0));
5937 record_unwind_protect (do_auto_save_unwind_1
,
5938 make_number (minibuffer_auto_raise
));
5939 minibuffer_auto_raise
= 0;
5942 /* On first pass, save all files that don't have handlers.
5943 On second pass, save all files that do have handlers.
5945 If Emacs is crashing, the handlers may tweak what is causing
5946 Emacs to crash in the first place, and it would be a shame if
5947 Emacs failed to autosave perfectly ordinary files because it
5948 couldn't handle some ange-ftp'd file. */
5950 for (do_handled_files
= 0; do_handled_files
< 2; do_handled_files
++)
5951 for (tail
= Vbuffer_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5953 buf
= XCDR (XCAR (tail
));
5956 /* Record all the buffers that have auto save mode
5957 in the special file that lists them. For each of these buffers,
5958 Record visited name (if any) and auto save name. */
5959 if (STRINGP (b
->auto_save_file_name
)
5960 && stream
!= NULL
&& do_handled_files
== 0)
5962 if (!NILP (b
->filename
))
5964 fwrite (SDATA (b
->filename
), 1,
5965 SBYTES (b
->filename
), stream
);
5967 putc ('\n', stream
);
5968 fwrite (SDATA (b
->auto_save_file_name
), 1,
5969 SBYTES (b
->auto_save_file_name
), stream
);
5970 putc ('\n', stream
);
5973 if (!NILP (current_only
)
5974 && b
!= current_buffer
)
5977 /* Don't auto-save indirect buffers.
5978 The base buffer takes care of it. */
5982 /* Check for auto save enabled
5983 and file changed since last auto save
5984 and file changed since last real save. */
5985 if (STRINGP (b
->auto_save_file_name
)
5986 && BUF_SAVE_MODIFF (b
) < BUF_MODIFF (b
)
5987 && b
->auto_save_modified
< BUF_MODIFF (b
)
5988 /* -1 means we've turned off autosaving for a while--see below. */
5989 && XINT (b
->save_length
) >= 0
5990 && (do_handled_files
5991 || NILP (Ffind_file_name_handler (b
->auto_save_file_name
,
5994 EMACS_TIME before_time
, after_time
;
5996 EMACS_GET_TIME (before_time
);
5998 /* If we had a failure, don't try again for 20 minutes. */
5999 if (b
->auto_save_failure_time
>= 0
6000 && EMACS_SECS (before_time
) - b
->auto_save_failure_time
< 1200)
6003 if ((XFASTINT (b
->save_length
) * 10
6004 > (BUF_Z (b
) - BUF_BEG (b
)) * 13)
6005 /* A short file is likely to change a large fraction;
6006 spare the user annoying messages. */
6007 && XFASTINT (b
->save_length
) > 5000
6008 /* These messages are frequent and annoying for `*mail*'. */
6009 && !EQ (b
->filename
, Qnil
)
6010 && NILP (no_message
))
6012 /* It has shrunk too much; turn off auto-saving here. */
6013 minibuffer_auto_raise
= orig_minibuffer_auto_raise
;
6014 message_with_string ("Buffer %s has shrunk a lot; auto save disabled in that buffer until next real save",
6016 minibuffer_auto_raise
= 0;
6017 /* Turn off auto-saving until there's a real save,
6018 and prevent any more warnings. */
6019 XSETINT (b
->save_length
, -1);
6020 Fsleep_for (make_number (1), Qnil
);
6023 set_buffer_internal (b
);
6024 if (!auto_saved
&& NILP (no_message
))
6025 message1 ("Auto-saving...");
6026 internal_condition_case (auto_save_1
, Qt
, auto_save_error
);
6028 b
->auto_save_modified
= BUF_MODIFF (b
);
6029 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
6030 set_buffer_internal (old
);
6032 EMACS_GET_TIME (after_time
);
6034 /* If auto-save took more than 60 seconds,
6035 assume it was an NFS failure that got a timeout. */
6036 if (EMACS_SECS (after_time
) - EMACS_SECS (before_time
) > 60)
6037 b
->auto_save_failure_time
= EMACS_SECS (after_time
);
6041 /* Prevent another auto save till enough input events come in. */
6042 record_auto_save ();
6044 if (auto_saved
&& NILP (no_message
))
6048 /* If we are going to restore an old message,
6049 give time to read ours. */
6050 sit_for (1, 0, 0, 0, 0);
6054 /* If we displayed a message and then restored a state
6055 with no message, leave a "done" message on the screen. */
6056 message1 ("Auto-saving...done");
6061 /* This restores the message-stack status. */
6062 unbind_to (count
, Qnil
);
6066 DEFUN ("set-buffer-auto-saved", Fset_buffer_auto_saved
,
6067 Sset_buffer_auto_saved
, 0, 0, 0,
6068 doc
: /* Mark current buffer as auto-saved with its current text.
6069 No auto-save file will be written until the buffer changes again. */)
6072 current_buffer
->auto_save_modified
= MODIFF
;
6073 XSETFASTINT (current_buffer
->save_length
, Z
- BEG
);
6074 current_buffer
->auto_save_failure_time
= -1;
6078 DEFUN ("clear-buffer-auto-save-failure", Fclear_buffer_auto_save_failure
,
6079 Sclear_buffer_auto_save_failure
, 0, 0, 0,
6080 doc
: /* Clear any record of a recent auto-save failure in the current buffer. */)
6083 current_buffer
->auto_save_failure_time
= -1;
6087 DEFUN ("recent-auto-save-p", Frecent_auto_save_p
, Srecent_auto_save_p
,
6089 doc
: /* Return t if current buffer has been auto-saved recently.
6090 More precisely, if it has been auto-saved since last read from or saved
6091 in the visited file. If the buffer has no visited file,
6092 then any auto-save counts as "recent". */)
6095 return (SAVE_MODIFF
< current_buffer
->auto_save_modified
) ? Qt
: Qnil
;
6098 /* Reading and completing file names */
6099 extern Lisp_Object
Ffile_name_completion (), Ffile_name_all_completions ();
6101 /* In the string VAL, change each $ to $$ and return the result. */
6104 double_dollars (val
)
6107 register const unsigned char *old
;
6108 register unsigned char *new;
6112 osize
= SBYTES (val
);
6114 /* Count the number of $ characters. */
6115 for (n
= osize
, count
= 0, old
= SDATA (val
); n
> 0; n
--)
6116 if (*old
++ == '$') count
++;
6120 val
= make_uninit_multibyte_string (SCHARS (val
) + count
,
6123 for (n
= osize
; n
> 0; n
--)
6137 read_file_name_cleanup (arg
)
6140 return (current_buffer
->directory
= arg
);
6143 DEFUN ("read-file-name-internal", Fread_file_name_internal
, Sread_file_name_internal
,
6145 doc
: /* Internal subroutine for read-file-name. Do not call this. */)
6146 (string
, dir
, action
)
6147 Lisp_Object string
, dir
, action
;
6148 /* action is nil for complete, t for return list of completions,
6149 lambda for verify final value */
6151 Lisp_Object name
, specdir
, realdir
, val
, orig_string
;
6153 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
6155 CHECK_STRING (string
);
6162 /* No need to protect ACTION--we only compare it with t and nil. */
6163 GCPRO5 (string
, realdir
, name
, specdir
, orig_string
);
6165 if (SCHARS (string
) == 0)
6167 if (EQ (action
, Qlambda
))
6175 orig_string
= string
;
6176 string
= Fsubstitute_in_file_name (string
);
6177 changed
= NILP (Fstring_equal (string
, orig_string
));
6178 name
= Ffile_name_nondirectory (string
);
6179 val
= Ffile_name_directory (string
);
6181 realdir
= Fexpand_file_name (val
, realdir
);
6186 specdir
= Ffile_name_directory (string
);
6187 val
= Ffile_name_completion (name
, realdir
);
6192 return double_dollars (string
);
6196 if (!NILP (specdir
))
6197 val
= concat2 (specdir
, val
);
6199 return double_dollars (val
);
6202 #endif /* not VMS */
6206 if (EQ (action
, Qt
))
6208 Lisp_Object all
= Ffile_name_all_completions (name
, realdir
);
6212 if (NILP (Vread_file_name_predicate
)
6213 || EQ (Vread_file_name_predicate
, Qfile_exists_p
))
6217 if (EQ (Vread_file_name_predicate
, Qfile_directory_p
))
6219 /* Brute-force speed up for directory checking:
6220 Discard strings which don't end in a slash. */
6221 for (comp
= Qnil
; CONSP (all
); all
= XCDR (all
))
6223 Lisp_Object tem
= XCAR (all
);
6225 if (STRINGP (tem
) &&
6226 (len
= SCHARS (tem
), len
> 0) &&
6227 IS_DIRECTORY_SEP (SREF (tem
, len
-1)))
6228 comp
= Fcons (tem
, comp
);
6234 /* Must do it the hard (and slow) way. */
6236 GCPRO3 (all
, comp
, specdir
);
6237 count
= SPECPDL_INDEX ();
6238 record_unwind_protect (read_file_name_cleanup
, current_buffer
->directory
);
6239 current_buffer
->directory
= realdir
;
6240 for (comp
= Qnil
; CONSP (all
); all
= XCDR (all
))
6242 tem
= call1 (Vread_file_name_predicate
, XCAR (all
));
6244 comp
= Fcons (XCAR (all
), comp
);
6246 unbind_to (count
, Qnil
);
6249 return Fnreverse (comp
);
6252 /* Only other case actually used is ACTION = lambda */
6254 /* Supposedly this helps commands such as `cd' that read directory names,
6255 but can someone explain how it helps them? -- RMS */
6256 if (SCHARS (name
) == 0)
6259 string
= Fexpand_file_name (string
, dir
);
6260 if (!NILP (Vread_file_name_predicate
))
6261 return call1 (Vread_file_name_predicate
, string
);
6262 return Ffile_exists_p (string
);
6265 DEFUN ("next-read-file-uses-dialog-p", Fnext_read_file_uses_dialog_p
,
6266 Snext_read_file_uses_dialog_p
, 0, 0, 0,
6267 doc
: /* Return t if a call to `read-file-name' will use a dialog.
6268 The return value is only relevant for a call to `read-file-name' that happens
6269 before any other event (mouse or keypress) is handeled. */)
6272 #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK) || defined (HAVE_CARBON)
6273 if ((NILP (last_nonmenu_event
) || CONSP (last_nonmenu_event
))
6282 DEFUN ("read-file-name", Fread_file_name
, Sread_file_name
, 1, 6, 0,
6283 doc
: /* Read file name, prompting with PROMPT and completing in directory DIR.
6284 Value is not expanded---you must call `expand-file-name' yourself.
6285 Default name to DEFAULT-FILENAME if user exits the minibuffer with
6286 the same non-empty string that was inserted by this function.
6287 (If DEFAULT-FILENAME is omitted, the visited file name is used,
6288 except that if INITIAL is specified, that combined with DIR is used.)
6289 If the user exits with an empty minibuffer, this function returns
6290 an empty string. (This can only happen if the user erased the
6291 pre-inserted contents or if `insert-default-directory' is nil.)
6292 Fourth arg MUSTMATCH non-nil means require existing file's name.
6293 Non-nil and non-t means also require confirmation after completion.
6294 Fifth arg INITIAL specifies text to start with.
6295 If optional sixth arg PREDICATE is non-nil, possible completions and
6296 the resulting file name must satisfy (funcall PREDICATE NAME).
6297 DIR should be an absolute directory name. It defaults to the value of
6298 `default-directory'.
6300 If this command was invoked with the mouse, use a file dialog box if
6301 `use-dialog-box' is non-nil, and the window system or X toolkit in use
6302 provides a file dialog box.
6304 See also `read-file-name-completion-ignore-case'
6305 and `read-file-name-function'. */)
6306 (prompt
, dir
, default_filename
, mustmatch
, initial
, predicate
)
6307 Lisp_Object prompt
, dir
, default_filename
, mustmatch
, initial
, predicate
;
6309 Lisp_Object val
, insdef
, tem
;
6310 struct gcpro gcpro1
, gcpro2
;
6311 register char *homedir
;
6312 Lisp_Object decoded_homedir
;
6313 int replace_in_history
= 0;
6314 int add_to_history
= 0;
6318 dir
= current_buffer
->directory
;
6319 if (NILP (Ffile_name_absolute_p (dir
)))
6320 dir
= Fexpand_file_name (dir
, Qnil
);
6321 if (NILP (default_filename
))
6324 ? Fexpand_file_name (initial
, dir
)
6325 : current_buffer
->filename
);
6327 /* If dir starts with user's homedir, change that to ~. */
6328 homedir
= (char *) egetenv ("HOME");
6330 /* homedir can be NULL in temacs, since Vglobal_environment is not
6331 yet set up. We shouldn't crash in that case. */
6334 homedir
= strcpy (alloca (strlen (homedir
) + 1), homedir
);
6335 CORRECT_DIR_SEPS (homedir
);
6340 = DECODE_FILE (make_unibyte_string (homedir
, strlen (homedir
)));
6343 && !strncmp (SDATA (decoded_homedir
), SDATA (dir
),
6344 SBYTES (decoded_homedir
))
6345 && IS_DIRECTORY_SEP (SREF (dir
, SBYTES (decoded_homedir
))))
6347 dir
= Fsubstring (dir
, make_number (SCHARS (decoded_homedir
)), Qnil
);
6348 dir
= concat2 (build_string ("~"), dir
);
6350 /* Likewise for default_filename. */
6352 && STRINGP (default_filename
)
6353 && !strncmp (SDATA (decoded_homedir
), SDATA (default_filename
),
6354 SBYTES (decoded_homedir
))
6355 && IS_DIRECTORY_SEP (SREF (default_filename
, SBYTES (decoded_homedir
))))
6358 = Fsubstring (default_filename
,
6359 make_number (SCHARS (decoded_homedir
)), Qnil
);
6360 default_filename
= concat2 (build_string ("~"), default_filename
);
6362 if (!NILP (default_filename
))
6364 CHECK_STRING (default_filename
);
6365 default_filename
= double_dollars (default_filename
);
6368 if (insert_default_directory
&& STRINGP (dir
))
6371 if (!NILP (initial
))
6373 Lisp_Object args
[2], pos
;
6377 insdef
= Fconcat (2, args
);
6378 pos
= make_number (SCHARS (double_dollars (dir
)));
6379 insdef
= Fcons (double_dollars (insdef
), pos
);
6382 insdef
= double_dollars (insdef
);
6384 else if (STRINGP (initial
))
6385 insdef
= Fcons (double_dollars (initial
), make_number (0));
6389 if (!NILP (Vread_file_name_function
))
6391 Lisp_Object args
[7];
6393 GCPRO2 (insdef
, default_filename
);
6394 args
[0] = Vread_file_name_function
;
6397 args
[3] = default_filename
;
6398 args
[4] = mustmatch
;
6400 args
[6] = predicate
;
6401 RETURN_UNGCPRO (Ffuncall (7, args
));
6404 count
= SPECPDL_INDEX ();
6405 specbind (intern ("completion-ignore-case"),
6406 read_file_name_completion_ignore_case
? Qt
: Qnil
);
6407 specbind (intern ("minibuffer-completing-file-name"), Qt
);
6408 specbind (intern ("read-file-name-predicate"),
6409 (NILP (predicate
) ? Qfile_exists_p
: predicate
));
6411 GCPRO2 (insdef
, default_filename
);
6413 #if defined (USE_MOTIF) || defined (HAVE_NTGUI) || defined (USE_GTK) || defined (HAVE_CARBON)
6414 if (! NILP (Fnext_read_file_uses_dialog_p ()))
6416 /* If DIR contains a file name, split it. */
6418 file
= Ffile_name_nondirectory (dir
);
6419 if (SCHARS (file
) && NILP (default_filename
))
6421 default_filename
= file
;
6422 dir
= Ffile_name_directory (dir
);
6424 if (!NILP(default_filename
))
6425 default_filename
= Fexpand_file_name (default_filename
, dir
);
6426 val
= Fx_file_dialog (prompt
, dir
, default_filename
, mustmatch
,
6427 EQ (predicate
, Qfile_directory_p
) ? Qt
: Qnil
);
6432 val
= Fcompleting_read (prompt
, intern ("read-file-name-internal"),
6433 dir
, mustmatch
, insdef
,
6434 Qfile_name_history
, default_filename
, Qnil
);
6436 tem
= Fsymbol_value (Qfile_name_history
);
6437 if (CONSP (tem
) && EQ (XCAR (tem
), val
))
6438 replace_in_history
= 1;
6440 /* If Fcompleting_read returned the inserted default string itself
6441 (rather than a new string with the same contents),
6442 it has to mean that the user typed RET with the minibuffer empty.
6443 In that case, we really want to return ""
6444 so that commands such as set-visited-file-name can distinguish. */
6445 if (EQ (val
, default_filename
))
6447 /* In this case, Fcompleting_read has not added an element
6448 to the history. Maybe we should. */
6449 if (! replace_in_history
)
6455 unbind_to (count
, Qnil
);
6458 error ("No file name specified");
6460 tem
= Fstring_equal (val
, CONSP (insdef
) ? XCAR (insdef
) : insdef
);
6462 if (!NILP (tem
) && !NILP (default_filename
))
6463 val
= default_filename
;
6464 val
= Fsubstitute_in_file_name (val
);
6466 if (replace_in_history
)
6467 /* Replace what Fcompleting_read added to the history
6468 with what we will actually return. */
6470 Lisp_Object val1
= double_dollars (val
);
6471 tem
= Fsymbol_value (Qfile_name_history
);
6472 if (history_delete_duplicates
)
6473 XSETCDR (tem
, Fdelete (val1
, XCDR(tem
)));
6474 XSETCAR (tem
, val1
);
6476 else if (add_to_history
)
6478 /* Add the value to the history--but not if it matches
6479 the last value already there. */
6480 Lisp_Object val1
= double_dollars (val
);
6481 tem
= Fsymbol_value (Qfile_name_history
);
6482 if (! CONSP (tem
) || NILP (Fequal (XCAR (tem
), val1
)))
6484 if (history_delete_duplicates
) tem
= Fdelete (val1
, tem
);
6485 Fset (Qfile_name_history
, Fcons (val1
, tem
));
6496 /* Must be set before any path manipulation is performed. */
6497 XSETFASTINT (Vdirectory_sep_char
, '/');
6504 Qoperations
= intern ("operations");
6505 Qexpand_file_name
= intern ("expand-file-name");
6506 Qsubstitute_in_file_name
= intern ("substitute-in-file-name");
6507 Qdirectory_file_name
= intern ("directory-file-name");
6508 Qfile_name_directory
= intern ("file-name-directory");
6509 Qfile_name_nondirectory
= intern ("file-name-nondirectory");
6510 Qunhandled_file_name_directory
= intern ("unhandled-file-name-directory");
6511 Qfile_name_as_directory
= intern ("file-name-as-directory");
6512 Qcopy_file
= intern ("copy-file");
6513 Qmake_directory_internal
= intern ("make-directory-internal");
6514 Qmake_directory
= intern ("make-directory");
6515 Qdelete_directory
= intern ("delete-directory");
6516 Qdelete_file
= intern ("delete-file");
6517 Qrename_file
= intern ("rename-file");
6518 Qadd_name_to_file
= intern ("add-name-to-file");
6519 Qmake_symbolic_link
= intern ("make-symbolic-link");
6520 Qfile_exists_p
= intern ("file-exists-p");
6521 Qfile_executable_p
= intern ("file-executable-p");
6522 Qfile_readable_p
= intern ("file-readable-p");
6523 Qfile_writable_p
= intern ("file-writable-p");
6524 Qfile_symlink_p
= intern ("file-symlink-p");
6525 Qaccess_file
= intern ("access-file");
6526 Qfile_directory_p
= intern ("file-directory-p");
6527 Qfile_regular_p
= intern ("file-regular-p");
6528 Qfile_accessible_directory_p
= intern ("file-accessible-directory-p");
6529 Qfile_modes
= intern ("file-modes");
6530 Qset_file_modes
= intern ("set-file-modes");
6531 Qset_file_times
= intern ("set-file-times");
6532 Qfile_newer_than_file_p
= intern ("file-newer-than-file-p");
6533 Qinsert_file_contents
= intern ("insert-file-contents");
6534 Qwrite_region
= intern ("write-region");
6535 Qverify_visited_file_modtime
= intern ("verify-visited-file-modtime");
6536 Qset_visited_file_modtime
= intern ("set-visited-file-modtime");
6537 Qauto_save_coding
= intern ("auto-save-coding");
6539 staticpro (&Qoperations
);
6540 staticpro (&Qexpand_file_name
);
6541 staticpro (&Qsubstitute_in_file_name
);
6542 staticpro (&Qdirectory_file_name
);
6543 staticpro (&Qfile_name_directory
);
6544 staticpro (&Qfile_name_nondirectory
);
6545 staticpro (&Qunhandled_file_name_directory
);
6546 staticpro (&Qfile_name_as_directory
);
6547 staticpro (&Qcopy_file
);
6548 staticpro (&Qmake_directory_internal
);
6549 staticpro (&Qmake_directory
);
6550 staticpro (&Qdelete_directory
);
6551 staticpro (&Qdelete_file
);
6552 staticpro (&Qrename_file
);
6553 staticpro (&Qadd_name_to_file
);
6554 staticpro (&Qmake_symbolic_link
);
6555 staticpro (&Qfile_exists_p
);
6556 staticpro (&Qfile_executable_p
);
6557 staticpro (&Qfile_readable_p
);
6558 staticpro (&Qfile_writable_p
);
6559 staticpro (&Qaccess_file
);
6560 staticpro (&Qfile_symlink_p
);
6561 staticpro (&Qfile_directory_p
);
6562 staticpro (&Qfile_regular_p
);
6563 staticpro (&Qfile_accessible_directory_p
);
6564 staticpro (&Qfile_modes
);
6565 staticpro (&Qset_file_modes
);
6566 staticpro (&Qset_file_times
);
6567 staticpro (&Qfile_newer_than_file_p
);
6568 staticpro (&Qinsert_file_contents
);
6569 staticpro (&Qwrite_region
);
6570 staticpro (&Qverify_visited_file_modtime
);
6571 staticpro (&Qset_visited_file_modtime
);
6572 staticpro (&Qauto_save_coding
);
6574 Qfile_name_history
= intern ("file-name-history");
6575 Fset (Qfile_name_history
, Qnil
);
6576 staticpro (&Qfile_name_history
);
6578 Qfile_error
= intern ("file-error");
6579 staticpro (&Qfile_error
);
6580 Qfile_already_exists
= intern ("file-already-exists");
6581 staticpro (&Qfile_already_exists
);
6582 Qfile_date_error
= intern ("file-date-error");
6583 staticpro (&Qfile_date_error
);
6584 Qexcl
= intern ("excl");
6588 Qfind_buffer_file_type
= intern ("find-buffer-file-type");
6589 staticpro (&Qfind_buffer_file_type
);
6592 DEFVAR_LISP ("file-name-coding-system", &Vfile_name_coding_system
,
6593 doc
: /* *Coding system for encoding file names.
6594 If it is nil, `default-file-name-coding-system' (which see) is used. */);
6595 Vfile_name_coding_system
= Qnil
;
6597 DEFVAR_LISP ("default-file-name-coding-system",
6598 &Vdefault_file_name_coding_system
,
6599 doc
: /* Default coding system for encoding file names.
6600 This variable is used only when `file-name-coding-system' is nil.
6602 This variable is set/changed by the command `set-language-environment'.
6603 User should not set this variable manually,
6604 instead use `file-name-coding-system' to get a constant encoding
6605 of file names regardless of the current language environment. */);
6606 Vdefault_file_name_coding_system
= Qnil
;
6608 Qformat_decode
= intern ("format-decode");
6609 staticpro (&Qformat_decode
);
6610 Qformat_annotate_function
= intern ("format-annotate-function");
6611 staticpro (&Qformat_annotate_function
);
6612 Qafter_insert_file_set_coding
= intern ("after-insert-file-set-coding");
6613 staticpro (&Qafter_insert_file_set_coding
);
6615 Qcar_less_than_car
= intern ("car-less-than-car");
6616 staticpro (&Qcar_less_than_car
);
6618 Fput (Qfile_error
, Qerror_conditions
,
6619 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
)));
6620 Fput (Qfile_error
, Qerror_message
,
6621 build_string ("File error"));
6623 Fput (Qfile_already_exists
, Qerror_conditions
,
6624 Fcons (Qfile_already_exists
,
6625 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
))));
6626 Fput (Qfile_already_exists
, Qerror_message
,
6627 build_string ("File already exists"));
6629 Fput (Qfile_date_error
, Qerror_conditions
,
6630 Fcons (Qfile_date_error
,
6631 Fcons (Qfile_error
, Fcons (Qerror
, Qnil
))));
6632 Fput (Qfile_date_error
, Qerror_message
,
6633 build_string ("Cannot set file date"));
6635 DEFVAR_LISP ("read-file-name-function", &Vread_file_name_function
,
6636 doc
: /* If this is non-nil, `read-file-name' does its work by calling this function. */);
6637 Vread_file_name_function
= Qnil
;
6639 DEFVAR_LISP ("read-file-name-predicate", &Vread_file_name_predicate
,
6640 doc
: /* Current predicate used by `read-file-name-internal'. */);
6641 Vread_file_name_predicate
= Qnil
;
6643 DEFVAR_BOOL ("read-file-name-completion-ignore-case", &read_file_name_completion_ignore_case
,
6644 doc
: /* *Non-nil means when reading a file name completion ignores case. */);
6645 #if defined VMS || defined DOS_NT || defined MAC_OS
6646 read_file_name_completion_ignore_case
= 1;
6648 read_file_name_completion_ignore_case
= 0;
6651 DEFVAR_BOOL ("insert-default-directory", &insert_default_directory
,
6652 doc
: /* *Non-nil means when reading a filename start with default dir in minibuffer.
6653 If the initial minibuffer contents are non-empty, you can usually
6654 request a default filename by typing RETURN without editing. For some
6655 commands, exiting with an empty minibuffer has a special meaning,
6656 such as making the current buffer visit no file in the case of
6657 `set-visited-file-name'.
6658 If this variable is non-nil, the minibuffer contents are always
6659 initially non-empty and typing RETURN without editing will fetch the
6660 default name, if one is provided. Note however that this default name
6661 is not necessarily the name originally inserted in the minibuffer, if
6662 that is just the default directory.
6663 If this variable is nil, the minibuffer often starts out empty. In
6664 that case you may have to explicitly fetch the next history element to
6665 request the default name. */);
6666 insert_default_directory
= 1;
6668 DEFVAR_BOOL ("vms-stmlf-recfm", &vms_stmlf_recfm
,
6669 doc
: /* *Non-nil means write new files with record format `stmlf'.
6670 nil means use format `var'. This variable is meaningful only on VMS. */);
6671 vms_stmlf_recfm
= 0;
6673 DEFVAR_LISP ("directory-sep-char", &Vdirectory_sep_char
,
6674 doc
: /* Directory separator character for built-in functions that return file names.
6675 The value is always ?/. Don't use this variable, just use `/'. */);
6677 DEFVAR_LISP ("file-name-handler-alist", &Vfile_name_handler_alist
,
6678 doc
: /* *Alist of elements (REGEXP . HANDLER) for file names handled specially.
6679 If a file name matches REGEXP, then all I/O on that file is done by calling
6682 The first argument given to HANDLER is the name of the I/O primitive
6683 to be handled; the remaining arguments are the arguments that were
6684 passed to that primitive. For example, if you do
6685 (file-exists-p FILENAME)
6686 and FILENAME is handled by HANDLER, then HANDLER is called like this:
6687 (funcall HANDLER 'file-exists-p FILENAME)
6688 The function `find-file-name-handler' checks this list for a handler
6689 for its argument. */);
6690 Vfile_name_handler_alist
= Qnil
;
6692 DEFVAR_LISP ("set-auto-coding-function",
6693 &Vset_auto_coding_function
,
6694 doc
: /* If non-nil, a function to call to decide a coding system of file.
6695 Two arguments are passed to this function: the file name
6696 and the length of a file contents following the point.
6697 This function should return a coding system to decode the file contents.
6698 It should check the file name against `auto-coding-alist'.
6699 If no coding system is decided, it should check a coding system
6700 specified in the heading lines with the format:
6701 -*- ... coding: CODING-SYSTEM; ... -*-
6702 or local variable spec of the tailing lines with `coding:' tag. */);
6703 Vset_auto_coding_function
= Qnil
;
6705 DEFVAR_LISP ("after-insert-file-functions", &Vafter_insert_file_functions
,
6706 doc
: /* A list of functions to be called at the end of `insert-file-contents'.
6707 Each is passed one argument, the number of characters inserted.
6708 It should return the new character count, and leave point the same.
6709 If `insert-file-contents' is intercepted by a handler from
6710 `file-name-handler-alist', that handler is responsible for calling the
6711 functions in `after-insert-file-functions' if appropriate. */);
6712 Vafter_insert_file_functions
= Qnil
;
6714 DEFVAR_LISP ("write-region-annotate-functions", &Vwrite_region_annotate_functions
,
6715 doc
: /* A list of functions to be called at the start of `write-region'.
6716 Each is passed two arguments, START and END as for `write-region'.
6717 These are usually two numbers but not always; see the documentation
6718 for `write-region'. The function should return a list of pairs
6719 of the form (POSITION . STRING), consisting of strings to be effectively
6720 inserted at the specified positions of the file being written (1 means to
6721 insert before the first byte written). The POSITIONs must be sorted into
6722 increasing order. If there are several functions in the list, the several
6723 lists are merged destructively. Alternatively, the function can return
6724 with a different buffer current; in that case it should pay attention
6725 to the annotations returned by previous functions and listed in
6726 `write-region-annotations-so-far'.*/);
6727 Vwrite_region_annotate_functions
= Qnil
;
6728 staticpro (&Qwrite_region_annotate_functions
);
6729 Qwrite_region_annotate_functions
6730 = intern ("write-region-annotate-functions");
6732 DEFVAR_LISP ("write-region-annotations-so-far",
6733 &Vwrite_region_annotations_so_far
,
6734 doc
: /* When an annotation function is called, this holds the previous annotations.
6735 These are the annotations made by other annotation functions
6736 that were already called. See also `write-region-annotate-functions'. */);
6737 Vwrite_region_annotations_so_far
= Qnil
;
6739 DEFVAR_LISP ("inhibit-file-name-handlers", &Vinhibit_file_name_handlers
,
6740 doc
: /* A list of file name handlers that temporarily should not be used.
6741 This applies only to the operation `inhibit-file-name-operation'. */);
6742 Vinhibit_file_name_handlers
= Qnil
;
6744 DEFVAR_LISP ("inhibit-file-name-operation", &Vinhibit_file_name_operation
,
6745 doc
: /* The operation for which `inhibit-file-name-handlers' is applicable. */);
6746 Vinhibit_file_name_operation
= Qnil
;
6748 DEFVAR_LISP ("auto-save-list-file-name", &Vauto_save_list_file_name
,
6749 doc
: /* File name in which we write a list of all auto save file names.
6750 This variable is initialized automatically from `auto-save-list-file-prefix'
6751 shortly after Emacs reads your `.emacs' file, if you have not yet given it
6752 a non-nil value. */);
6753 Vauto_save_list_file_name
= Qnil
;
6756 DEFVAR_BOOL ("write-region-inhibit-fsync", &write_region_inhibit_fsync
,
6757 doc
: /* *Non-nil means don't call fsync in `write-region'.
6758 This variable affects calls to `write-region' as well as save commands.
6759 A non-nil value may result in data loss! */);
6760 write_region_inhibit_fsync
= 0;
6763 defsubr (&Sfind_file_name_handler
);
6764 defsubr (&Sfile_name_directory
);
6765 defsubr (&Sfile_name_nondirectory
);
6766 defsubr (&Sunhandled_file_name_directory
);
6767 defsubr (&Sfile_name_as_directory
);
6768 defsubr (&Sdirectory_file_name
);
6769 defsubr (&Smake_temp_name
);
6770 defsubr (&Sexpand_file_name
);
6771 defsubr (&Ssubstitute_in_file_name
);
6772 defsubr (&Scopy_file
);
6773 defsubr (&Smake_directory_internal
);
6774 defsubr (&Sdelete_directory
);
6775 defsubr (&Sdelete_file
);
6776 defsubr (&Srename_file
);
6777 defsubr (&Sadd_name_to_file
);
6779 defsubr (&Smake_symbolic_link
);
6780 #endif /* S_IFLNK */
6782 defsubr (&Sdefine_logical_name
);
6785 defsubr (&Ssysnetunam
);
6786 #endif /* HPUX_NET */
6787 defsubr (&Sfile_name_absolute_p
);
6788 defsubr (&Sfile_exists_p
);
6789 defsubr (&Sfile_executable_p
);
6790 defsubr (&Sfile_readable_p
);
6791 defsubr (&Sfile_writable_p
);
6792 defsubr (&Saccess_file
);
6793 defsubr (&Sfile_symlink_p
);
6794 defsubr (&Sfile_directory_p
);
6795 defsubr (&Sfile_accessible_directory_p
);
6796 defsubr (&Sfile_regular_p
);
6797 defsubr (&Sfile_modes
);
6798 defsubr (&Sset_file_modes
);
6799 defsubr (&Sset_file_times
);
6800 defsubr (&Sset_default_file_modes
);
6801 defsubr (&Sdefault_file_modes
);
6802 defsubr (&Sfile_newer_than_file_p
);
6803 defsubr (&Sinsert_file_contents
);
6804 defsubr (&Swrite_region
);
6805 defsubr (&Scar_less_than_car
);
6806 defsubr (&Sverify_visited_file_modtime
);
6807 defsubr (&Sclear_visited_file_modtime
);
6808 defsubr (&Svisited_file_modtime
);
6809 defsubr (&Sset_visited_file_modtime
);
6810 defsubr (&Sdo_auto_save
);
6811 defsubr (&Sset_buffer_auto_saved
);
6812 defsubr (&Sclear_buffer_auto_save_failure
);
6813 defsubr (&Srecent_auto_save_p
);
6815 defsubr (&Sread_file_name_internal
);
6816 defsubr (&Sread_file_name
);
6817 defsubr (&Snext_read_file_uses_dialog_p
);
6820 defsubr (&Sunix_sync
);
6824 /* arch-tag: 64ba3fd7-f844-4fb2-ba4b-427eb928786c
6825 (do not change this comment) */