| blob | 67b8b6adba3f1afa20b61fe97cd2d8352b1801ec |
1 ;;; files.el --- file input and output commands for Emacs
3 ;; Copyright (C) 1985,86,87,92,93,94,95,96,97,98,99,2000,01,02,2003
4 ;;; Free Software Foundation, Inc.
6 ;; Maintainer: FSF
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
13 ;; any later version.
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
25 ;;; Commentary:
27 ;; Defines most of Emacs's file- and directory-handling functions,
28 ;; including basic file visiting, backup generation, link handling,
29 ;; ITS-id version control, load- and write-hook handling, and the like.
31 ;;; Code:
34 "Backups of edited data files."
38 "Finding files."
43 "*Non-nil means delete auto-save file when a buffer is saved or killed.
45 Note that auto-save file will not be deleted if the buffer is killed
46 when it has unsaved changes."
51 nil
52 "*Alist of abbreviations for file directories.
53 A list of elements of the form (FROM . TO), each meaning to replace
54 FROM with TO when it appears in a directory name. This replacement is
55 done when setting up the default directory of a newly visited file.
56 *Every* FROM string should start with `^'.
58 Do not use `~' in the TO strings.
59 They should be ordinary absolute directory names.
61 Use this feature when you have directories which you normally refer to
62 via absolute symbolic links. Make TO the name of the link, and FROM
63 the name it is linked to."
71 ;; Turn off backup files on VMS since it has version numbers.
73 "*Non-nil means make a backup of a file the first time it is saved.
74 This can be done by renaming the file or by copying.
76 Renaming means that Emacs renames the existing file so that it is a
77 backup file, then writes the buffer into a new file. Any other names
78 that the old file had will now refer to the backup file. The new file
79 is owned by you and its group is defaulted.
81 Copying means that Emacs copies the existing file into the backup
82 file, then writes the buffer on top of the existing file. Any other
83 names that the old file had will now refer to the new (edited) file.
84 The file's owner and group are unchanged.
86 The choice of renaming or copying is controlled by the variables
87 `backup-by-copying', `backup-by-copying-when-linked',
88 `backup-by-copying-when-mismatch' and
89 `backup-by-copying-when-privileged-mismatch'. See also `backup-inhibited'."
93 ;; Do this so that local variables based on the file name
94 ;; are not overridden by the major mode.
96 "Non-nil means don't make a backup, regardless of the other parameters.
97 This variable is intended for use by making it local to a buffer.
102 "*Non-nil means always use copying to create backup files.
103 See documentation of variable `make-backup-files'."
108 "*Non-nil means use copying to create backups for files with multiple names.
109 This causes the alternate names to refer to the latest version as edited.
110 This variable is relevant only if `backup-by-copying' is nil."
115 "*Non-nil means create backups by copying if this preserves owner or group.
116 Renaming may still be used (subject to control of other variables)
117 when it would not result in changing the owner or group of the file;
118 that is, for files which are owned by you and whose group matches
119 the default for a new file created there by you.
120 This variable is relevant only if `backup-by-copying' is nil."
125 "*Non-nil means create backups by copying to preserve a privileged owner.
126 Renaming may still be used (subject to control of other variables)
127 when it would not result in changing the owner of the file or if the owner
128 has a user id greater than the value of this variable. This is useful
129 when low-numbered uid's are used for special system users (such as root)
130 that must maintain ownership of certain files.
131 This variable is relevant only if `backup-by-copying' and
132 `backup-by-copying-when-mismatch' are nil."
137 "Predicate that looks at a file name and decides whether to make backups.
141 "*Non-nil in a buffer means always offer to save buffer on exit.
142 Do so even if the buffer is not visiting a file.
143 Automatically local in all buffers."
149 "*Non-nil means find a file under alternative names, in existing buffers.
150 This means if any existing buffer is visiting the file you want
151 under another name, you get the existing buffer instead of a new buffer."
156 "*Non-nil means visit a file under its truename.
157 The truename of a file is found by chasing all links
158 both at the file level and at the levels of the containing directories."
163 nil
164 "*Specify which files should be reverted without query.
165 The value is a list of regular expressions.
166 If the file name matches one of these regular expressions,
167 then `revert-buffer' reverts the file without querying
168 if the file has changed on disk and you have not edited the buffer."
173 "The device number and file number of the file visited in the current buffer.
174 The value is a list of the form (FILENUM DEVNUM).
175 This pair of numbers uniquely identifies the file.
195 "The directory for writing temporary files."
201 "The directory for writing small temporary files.
202 If non-nil, this directory is used instead of `temporary-file-directory'
203 by programs that create small temporary files. This is for systems that
204 have fast storage with limited space, such as a RAM disk."
208 ;; The system null device. (Should reference NULL_DEVICE from C.)
225 "*Non-nil means protect against I/O errors while saving files.
226 Some modes set this non-nil in particular buffers.
228 This feature works by writing the new contents into a temporary file
229 and then renaming the temporary file to replace the original.
230 In this way, any I/O error in writing leaves the original untouched,
231 and there is never any instant where the file is nonexistent.
233 Note that this feature forces backups to be made by copying.
234 Yet, at the same time, saving a precious file
235 breaks any hard links between it and other files."
240 "*Control use of version numbers for backup files.
241 t means make numeric backup versions unconditionally.
242 nil means make them for files that have some already.
243 `never' means do not make them."
251 "*When cleaning directory, number of versions to keep."
257 "*If t, delete excess backup versions silently.
258 If nil, ask confirmation. Any other value prevents any trimming."
265 "*Number of oldest versions to keep when a new numbered backup is made."
270 "*Number of newest versions to keep when a new numbered backup is made.
271 Includes the new backup. Must be > 0"
276 "*Value of t says silently ensure a file ends in a newline when it is saved.
277 Non-nil but not t says ask user whether to add a newline when there isn't one.
278 nil means don't add newlines."
285 "*Non-nil says by default do auto-saving of every file-visiting buffer."
290 "*Non-nil says auto-save a buffer in the file it is visiting, when practical.
291 Normally auto-save files are written under other names."
297 ;; Don't put "\\2" inside expand-file-name, since it will be
298 ;; transformed to "/2" on DOS/Windows.
300 "*Transforms to apply to buffer file name before making auto-save file name.
301 Each transform is a list (REGEXP REPLACEMENT UNIQUIFY):
302 REGEXP is a regular expression to match against the file name.
303 If it matches, `replace-match' is used to replace the
304 matching part with REPLACEMENT.
305 If the optional element UNIQUIFY is non-nil, the auto-save file name is
306 constructed by taking the directory part of the replaced file-name,
307 concatenated with the buffer file name with all directory separators
308 changed to `!' to prevent clashes. This will not work
309 correctly if your filesystem truncates the resulting name.
311 All the transforms in the list are tried, in the order they are listed.
312 When one transform applies, its result is final;
313 no further transforms are tried.
315 The default value is set up to put the auto-save file into the
316 temporary directory (see the variable `temporary-file-directory') for
317 editing a remote file.
319 On MS-DOS filesystems without long names this variable is always
320 ignored."
327 "*Non-nil means save word abbrevs too when files are saved.
328 If `silently', don't ask the user before saving."
333 "*Non-nil means allow `find-file' to visit directories.
334 To visit the directory, `find-file' runs `find-directory-functions'."
339 "*List of functions to try in sequence to visit a directory.
340 Each function is called with the directory name as the sole argument
341 and should return either a buffer or nil."
345 ;;;It is not useful to make this a local variable.
346 ;;;(put 'find-file-not-found-hooks 'permanent-local t)
348 "List of functions to be called for `find-file' on nonexistent file.
349 These functions are called as soon as the error is detected.
350 Variable `buffer-file-name' is already set up.
356 ;;;It is not useful to make this a local variable.
357 ;;;(put 'find-file-hooks 'permanent-local t)
359 "List of functions to be called after a buffer is loaded from a file.
360 The buffer's local variables (if any) will have been processed before the
366 "List of functions to be called before writing out a buffer to a file.
367 If one of them returns non-nil, the file is considered already written
368 and the rest are not called.
369 These hooks are considered to pertain to the visited file.
370 So any buffer-local binding of this variable is discarded if you change
372 change the major mode.
385 "List of functions to be called before writing out a buffer to a file.
386 If one of them returns non-nil, the file is considered already written
387 and the rest are not called.
389 This variable is meant to be used for hooks that pertain to the
390 buffer's contents, not to the particular visited file; thus,
391 `set-visited-file-name' does not clear this variable; but changing the
392 major mode does clear it.
400 "*Control use of local variables in files you visit.
401 The value can be t, nil or something else.
402 A value of t means file local variables specifications are obeyed;
403 nil means they are ignored; anything else means query.
404 This variable also controls use of major modes specified in
405 a -*- line.
408 always obeys file local variable specifications and the -*- line,
409 and ignores this variable."
416 "Like `enable-local-variables' but meant for buffer-local bindings.
417 The meaningful values are nil and non-nil. The default is non-nil.
418 If a major mode sets this to nil, buffer-locally, then any local
419 variables list in the file will be ignored.
421 This variable does not affect the use of major modes
426 The value can be t, nil or something else.
427 A value of t means obey `eval' variables;
428 nil means ignore them; anything else means query.
431 and ignores this variable."
437 ;; Avoid losing in versions where CLASH_DETECTION is disabled.
446 "*Non-nil means buffers visiting files read-only do so in view mode.
447 In fact, this means that all read-only buffers normally have
448 View mode enabled, including buffers that are read-only because
449 you visit a file you cannot alter, and buffers you make read-only
456 "Provides support for ange-ftp host name completion.
457 Runs the usual ange-ftp hook, but only for completion operations."
458 ;; Having this here avoids the need to load ange-ftp when it's not
459 ;; really in use.
465 inhibit-file-name-handlers)))
470 "Convert a standard file's name to something suitable for the current OS.
471 This function's standard definition is trivial; it just returns the argument.
472 However, on some systems, the function is redefined with a definition
473 that really does change some file names to canonicalize certain
474 patterns and to guarantee valid names."
475 filename)
478 "Read directory name, prompting with PROMPT and completing in directory DIR.
479 Value is not expanded---you must call `expand-file-name' yourself.
480 Default name to DEFAULT-DIRNAME if user enters a null string.
481 (If DEFAULT-DIRNAME is omitted, the current buffer's directory is used,
482 except that if INITIAL is specified, that combined with DIR is used.)
483 Fourth arg MUSTMATCH non-nil means require existing directory's name.
484 Non-nil and non-t means also require confirmation after completion.
485 Fifth arg INITIAL specifies text to start with.
486 DIR defaults to current buffer's directory default."
495 \f
497 "Show the current default directory."
502 "Value of the CDPATH environment variable, as a list.
506 "Explode a colon-separated search path into a list of directory names.
507 \(For values of `colon' equal to `path-separator'.)"
508 ;; We could use split-string here.
516 nil
521 cd-list)))
524 "Change current directory to given absolute file name DIR."
525 ;; Put the name into directory syntax now,
526 ;; because otherwise expand-file-name may give some bad results.
539 "Make DIR become the current buffer's default directory.
540 If your environment includes a `CDPATH' variable, try each one of that
541 colon-separated list of directories when resolving a relative directory name."
544 default-directory default-directory
560 cd-path)
561 nil))
565 "Load the Lisp file named FILE."
566 ;; This is a case where .elc makes a lot of sense.
573 "Search for FILENAME through PATH.
574 If SUFFIXES is non-nil, it should be a list of suffixes to append to
576 If non-nil, PREDICATE is used instead of `file-readable-p'.
577 PREDICATE can also be an integer to pass to the `access' system call,
578 in which case file-name handlers are ignored. This usage is deprecated.
580 For compatibility, PREDICATE can also be one of the symbols
581 `executable', `readable', `writable', or `exists', or a list of
582 one or more of those symbols."
593 "Do completion for file names passed to `locate-file'.
594 PATH-AND-SUFFIXES is a pair of lists (DIRECTORIES . SUFFIXES)."
615 "Load the library named LIBRARY.
616 This is an interface to the function `load'."
619 'locate-file-completion
624 "Test whether FILE specifies a location on a remote system."
630 "Copy the file FILE into a temporary file on this machine.
631 Returns the name of the local copy, or nil, if FILE is directly
632 accessible."
633 ;; This formerly had an optional BUFFER argument that wasn't used by
634 ;; anything.
638 nil)))
641 "Return the truename of FILENAME, which should be absolute.
642 The truename of a file name is found by chasing symbolic links
643 both at the level of the file and at the level of the directories
644 containing it, until no links are left at any level.
646 The arguments COUNTER and PREV-DIRS are used only in recursive calls.
647 Do not specify them in other calls."
648 ;; COUNTER can be a cons cell whose car is the count of how many more links
649 ;; to chase before getting an error.
650 ;; PREV-DIRS can be a cons cell whose car is an alist
651 ;; of truenames we've just recently computed.
653 ;; The last test looks dubious, maybe `+' is meant here? --simon.
663 ;; For speed, remove the ange-ftp completion handler from the list.
664 ;; We know it's not needed here.
665 ;; For even more speed, do this only on the outermost call.
672 ;; andrewi@harlequin.co.uk - none of the following code (except for
673 ;; invoking the file-name handler) currently applies on Windows
674 ;; (ie. there are no native symlinks), but there is an issue with
675 ;; case differences being ignored by the OS, and short "8.3 DOS"
676 ;; name aliases existing for all files. (The short names are not
677 ;; reported by directory-files, but can be used to refer to files.)
678 ;; It seems appropriate for file-truename to resolve these issues in
679 ;; the most natural way, which on Windows is to call the function
680 ;; `w32-long-file-name' - this returns the exact name of a file as
681 ;; it is stored on disk (expanding short name aliases with the full
682 ;; name in the process).
685 ;; For file name that has a special handler, call handler.
686 ;; This is so that ange-ftp can save time by doing a no-op.
689 ;; If filename contains a wildcard, newname will be the old name.
691 ;; If filename exists, use the long name
695 ;; If this file directly leads to a link, process that iteratively
696 ;; so that we don't use lots of stack.
702 ;; For file name that has a special handler, call handler.
703 ;; This is so that ange-ftp can save time by doing a no-op.
706 done t)
708 target dirfile)
709 ;; Get the truename of the directory.
711 ;; If these are equal, we have the (or a) root directory.
713 ;; If this is the same dir we last got the truename for,
714 ;; save time--don't recalculate.
724 done t)
727 done t)
728 ;; Put it back on the file name.
730 ;; Is the file name the name of a link?
733 ;; Yes => chase that link, then start all over
734 ;; since the link may point to a directory name that uses links.
735 ;; We can't safely use expand-file-name here
736 ;; since target might look like foo/../bar where foo
737 ;; is itself a link. Instead, we handle . and .. above.
740 target
742 done nil)
743 ;; No, we are done!
745 filename))
748 "Chase links in FILENAME until a name that is not a link.
749 Unlike `file-truename', this does not check whether a parent
750 directory name is a symbolic link.
751 If the optional argument LIMIT is a number,
752 it means chase no more than that many links and then stop."
760 ;; In the context of a link, `//' doesn't mean what Emacs thinks.
763 ;; Handle `..' by hand, since it needs to work in the
764 ;; target of any directory symlink.
765 ;; This code is not quite complete; it does not handle
766 ;; embedded .. in some cases such as ./../foo and foo/bar/../../../lose.
770 ;; Chase links in the default dir of the symlink.
774 ;; Now find the parent of that dir.
778 newname))
781 "Change the encoding of FILE's name from CODING to NEW-CODING.
782 The value is a new name of FILE.
783 Signals a `file-already-exists' error if a file of the new name
784 already exists unless optional third argument OK-IF-ALREADY-EXISTS
785 is non-nil. A number as third arg means request confirmation if
786 the new name already exists. This is what happens in interactive
787 use with M-x."
790 default-file-name-coding-system))
792 from-coding to-coding)
794 ;; We provide the default coding only when it seems that
795 ;; the filename is correctly decoded by the default
796 ;; coding.
802 filename default-coding)
803 default-coding))
807 ;; We provide the default coding only when a user is going to
808 ;; change the encoding not from the default coding.
812 filename from-coding)))
815 filename from-coding default-coding)
816 default-coding)))
820 default-file-name-coding-system))
821 ;; FILE should have been decoded by DEFAULT-CODING.
825 ;; Suppress further encoding.
830 newname))
831 \f
833 "Select buffer BUFFER in another window.
834 Optional second arg NORECORD non-nil means
835 do not put this buffer at the front of the list of recently selected ones.
837 This uses the function `display-buffer' as a subroutine; see its
838 documentation for additional customization information."
844 "Switch to buffer BUFFER in another frame.
845 Optional second arg NORECORD non-nil means
846 do not put this buffer at the front of the list of recently selected ones.
848 This uses the function `display-buffer' as a subroutine; see its
849 documentation for additional customization information."
865 ;; Clear out this hook so it does not interfere
866 ;; with any recursive minibuffer usage.
869 minibuffer-setup-hook))
872 t))
875 "Edit file FILENAME.
876 Switch to a buffer visiting file FILENAME,
877 creating one if none already exists.
878 Interactively, the default if you just type RET is the current directory,
879 but the visited file name is available through the minibuffer history:
880 type M-n to pull it into the minibuffer.
882 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
883 expand wildcards (if any) and visit multiple files. Wildcard expansion
884 can be suppressed by setting `find-file-wildcards'."
893 "Edit file FILENAME, in another window.
894 May create a new window, or reuse an existing one.
895 See the function `display-buffer'.
897 Interactively, the default if you just type RET is the current directory,
898 but the visited file name is available through the minibuffer history:
899 type M-n to pull it into the minibuffer.
901 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
902 expand wildcards (if any) and visit multiple files."
913 "Edit file FILENAME, in another frame.
914 May create a new frame, or reuse an existing one.
915 See the function `display-buffer'.
917 Interactively, the default if you just type RET is the current directory,
918 but the visited file name is available through the minibuffer history:
919 type M-n to pull it into the minibuffer.
921 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
922 expand wildcards (if any) and visit multiple files."
933 "Edit file FILENAME but don't allow changes.
943 "Edit file FILENAME in another window but don't allow changes.
953 "Edit file FILENAME in another frame but don't allow changes.
963 "Find file FILENAME as a replacement for the file in the next window.
964 This command does not select that window."
983 "Find file FILENAME, select its buffer, kill previous buffer.
984 If the current buffer now contains an empty file that you just visited
985 \(presumably by mistake), use this command to visit the file you really want."
1015 ;; This prevents us from finding the same buffer
1016 ;; if we specified the same file again.
1020 ;; Likewise for dired buffers.
1024 ;; This executes if find-file gets an error
1025 ;; and does not really find anything.
1026 ;; We put things back as they were.
1027 ;; If find-file actually finds something, we kill obuf below.
1036 ;; We already asked; don't ask again.
1039 \f
1041 "Create a suitably named buffer for visiting FILENAME, and return it.
1042 FILENAME (sans directory) is used unchanged if that name is free;
1043 otherwise a string <2> or <3> or ... is appended to get an unused name."
1050 "Create and return a buffer with a name based on NAME.
1051 Choose the buffer's name using `generate-new-buffer-name'."
1055 "Regexp to match the automounter prefix in a directory name."
1063 "Return a version of FILENAME shortened using `directory-abbrev-alist'.
1065 removes automounter prefixes (see the variable `automount-dir-prefix')."
1066 ;; Get rid of the prefixes added by the automounter.
1073 ;; If any elt of directory-abbrev-alist matches this name,
1074 ;; abbreviate accordingly.
1080 ;; Compute and save the abbreviated homedir name.
1081 ;; We defer computing this until the first time it's needed, to
1082 ;; give time for directory-abbrev-alist to be set properly.
1083 ;; We include a slash at the end, to avoid spurious matches
1084 ;; such as `/usr/foobar' when the home dir is `/usr/foo'.
1091 ;; If FILENAME starts with the abbreviated homedir,
1092 ;; make it start with `~' instead.
1094 ;; If the home dir is just /, don't change it.
1097 ;; MS-DOS root directories can come with a drive letter;
1098 ;; Novell Netware allows drive letters beyond `Z:'.
1108 filename))
1111 "*List of logical names for which visiting shouldn't save the true dirname.
1112 On VMS, when you visit a file using a logical name that searches a path,
1113 you may or may not want the visited file name to record the specific
1114 directory where the file was found. If you *do not* want that, add the logical
1115 name to this list as a string."
1120 "Return the buffer visiting file FILENAME (a string).
1121 This is like `get-file-buffer', except that it checks for any buffer
1122 visiting the same file, possibly under a different name.
1123 If PREDICATE is non-nil, only a buffer satisfying it can be returned.
1124 If there is no such live buffer, return nil."
1138 found)
1143 number
1148 ;; Verify this buffer's file number
1149 ;; still belongs to its file.
1152 attributes)
1156 found))))
1157 \f
1159 "*Non-nil means file-visiting commands should handle wildcards.
1160 For example, if you specify `*.c', that would visit all the files
1161 whose names match the pattern."
1167 "*Non-nil means suppress warning messages for symlinked files.
1168 When nil, Emacs prints a warning when visiting a file that is already
1169 visited, but with a different name. Setting this option to t
1170 suppresses this warning."
1176 "Maximum size of file above which a confirmation is requested."
1180 "Read file FILENAME into a buffer and return the buffer.
1181 If a buffer exists visiting FILENAME, return that one, but
1182 verify that the file has not changed since visited or saved.
1183 The buffer is not selected, just returned to the caller.
1184 Optional first arg NOWARN non-nil means suppress any warning messages.
1185 Optional second arg RAWFILE non-nil means the file is read literally.
1186 Optional third arg WILDCARDS non-nil means do wildcard processing
1187 and visit all the matching files. When wildcards are actually
1188 used and expanded, the value is a list of buffers
1189 that are visiting the various files."
1196 'find-directory-functions
1199 filename)))
1202 find-file-wildcards
1216 ;; Find any buffer for a file which has same truename.
1218 ;; Let user know if there is a buffer with the same truename.
1222 find-file-suppress-same-file-warnings
1226 ;; Optionally also find that buffer.
1229 ;; Check to see if the file looks uncommonly large.
1231 ;; Don't ask again if we already have the file or
1232 ;; if we're asked to be quiet.
1241 ;; We are using an existing buffer.
1247 ;; Certain files should be reverted automatically
1248 ;; if they have changed on disk and not in the buffer.
1256 found))
1266 "File %s changed on disk. Discard your edits? "
1271 "File %s changed on disk. Discard your edits in %s? "
1279 ;; Check if a formerly read-only file has become
1280 ;; writable and vice versa, but if the buffer agrees
1281 ;; with the new state of the file, that is ok too.
1288 buffer-file-name
1296 ;; It is confusing to ask whether to visit
1297 ;; non-literally if they have the file in
1298 ;; hexl-mode.
1302 "Save file and revisit literally? "
1307 rawfile truename number))
1309 "Discard your edits and revisit file literally? "
1312 rawfile truename number)
1316 "Revisit file literally? "
1319 rawfile truename number)
1322 ;; Return the buffer we are using.
1323 buf)
1324 ;; Create a new buffer.
1327 ;; find-file-noselect-1 may use a different buffer.
1329 rawfile truename number))))))
1333 error)
1336 ;; Needed in case we are re-visiting the file with a different
1337 ;; text representation.
1352 filename)))
1353 ;; Unconditionally set error
1362 filename)))
1363 ;; Run find-file-not-found-hooks until one returns non-nil.
1365 ;; If they fail too, set error.
1367 ;; Record the file's truename, and maybe use that as visited name.
1373 ;; On VMS, we may want to remember which directory in a search list
1374 ;; the file was found in.
1386 ;; Set buffer's default directory to that of the file.
1388 ;; Turn off backup files for certain file names. Since
1389 ;; this is a permanent local, the major mode won't eliminate it.
1402 \f
1404 "Like `insert-file-contents', but only reads in the file literally.
1405 A buffer may be modified in several ways after reading into the buffer,
1406 to Emacs features such as format decoding, character code
1407 conversion, `find-file-hook', automatic uncompression, etc.
1409 This function ensures that none of these modifications will take place."
1417 nil))
1420 inhibit-file-name-handlers))
1433 filename)))
1443 "Insert contents of file FILENAME into buffer after point with no conversion.
1445 This function is meant for the user to run interactively.
1446 Don't call it from programs! Use `insert-file-contents-literally' instead.
1447 \(Its calling sequence is different; see its documentation)."
1452 "Non-nil if this buffer was made by `find-file-literally' or equivalent.
1457 "Visit file FILENAME with no conversion of any kind.
1458 Format conversion and character code conversion are both disabled,
1459 and multibyte characters are disabled in the resulting buffer.
1460 The major mode used is Fundamental mode regardless of the file name,
1461 and local variable specifications in the file are ignored.
1462 Automatic uncompression and adding a newline at the end of the
1463 file due to `require-final-newline' is also disabled.
1465 You cannot absolutely rely on this function to result in
1466 visiting the file literally. If Emacs already has a buffer
1467 which is visiting the file, you get the existing buffer,
1468 regardless of whether it was created literally or not.
1470 In a Lisp program, if you want to be sure of accessing a file's
1471 contents literally, you should create a temporary buffer and then read
1472 the file contents into it using `insert-file-contents-literally'."
1475 \f
1479 after-find-file-from-revert-buffer
1480 nomodes)
1481 "Called after finding a file and by the default revert function.
1482 Sets buffer mode, parses local variables.
1483 Optional args ERROR, WARN, and NOAUTO: ERROR non-nil means there was an
1484 error in reading the file. WARN non-nil means warn if there
1485 exists an auto-save file more recent than the visited file.
1486 NOAUTO means don't mess with auto-save mode.
1487 Fourth arg AFTER-FIND-FILE-FROM-REVERT-BUFFER non-nil
1488 means this call was from `revert-buffer'.
1489 Fifth arg NOMODES non-nil means don't alter the file's modes.
1490 Finishes by calling the functions in `find-file-hook'
1491 unless NOMODES is non-nil."
1494 nil
1504 ;; No need to warn if buffer is auto-saved
1505 ;; under the name of the visited file.
1507 auto-save-visited-file-name))
1510 buffer-file-name))
1524 (if (file-exists-p (file-name-directory (directory-file-name (file-name-directory buffer-file-name))))
1525 "Use M-x make-directory RET RET to create the directory"
1532 ;; Make people do a little extra work (C-x C-q)
1533 ;; before altering a backup file.
1536 ;; When a file is marked read-only,
1537 ;; make the buffer read-only even if root is looking at it.
1546 view-read-only
1552 "Eval BODY and turn any error into a FORMAT message.
1553 FORMAT can have a %s escape which will be replaced with the actual error.
1554 If `debug-on-error' is set, errors are not caught, so that you can
1555 debug them.
1556 Avoid using a large BODY since it is duplicated."
1565 "Choose the major mode for this buffer automatically.
1566 Also sets up any specified local variables of the file.
1567 Uses the visited file name, the -*- line, and the local variables spec.
1569 This function is called automatically from `find-file'. In that case,
1570 we may set up the file-specified mode and local variables,
1571 depending on the value of `enable-local-variables': if it is t, we do;
1572 if it is nil, we don't; otherwise, we query.
1573 In addition, if `local-enable-local-variables' is nil, we do
1574 not set local variables (though we do notice a mode specified with -*-.)
1576 `enable-local-variables' is ignored if you run `normal-mode' interactively,
1577 or from Lisp without specifying the optional argument FIND-FILE;
1578 in that case, this function acts as if `enable-local-variables' were t."
1628 ;; Less common extensions come here
1629 ;; so more common ones above are found faster.
1639 ;; for MSDOS and MS-Windows (which are case-insensitive)
1687 ;; Mailer puts message to be edited in
1688 ;; /tmp/Re.... or Message
1693 ;; some news reader is reported to use this
1704 ;; .emacs or .gnus or .viper following a directory delimiter in
1705 ;; Unix, MSDOG or VMS syntax.
1708 ;; _emacs following a directory delimiter
1709 ;; in MsDos syntax
1722 ;; Get rid of any trailing .n.m and try again.
1723 ;; This is for files saved by cvs-merge that look like .#<file>.<rev>
1724 ;; or .#<file>.<rev>-<rev> or VC's <file>.~<rev>~.
1725 ;; Using mode nil rather than `ignore' would let the search continue
1726 ;; through this list (with the shortened name) rather than start over.
1728 ;; The following should come after the ChangeLog pattern
1729 ;; for the sake of ChangeLog.1, etc.
1730 ;; and after the .scm.[0-9] and CVS' <file>.<rev> patterns too.
1735 "Alist of filename patterns vs corresponding major mode functions.
1736 Each element looks like (REGEXP . FUNCTION) or (REGEXP FUNCTION NON-NIL).
1737 \(NON-NIL stands for anything that is not nil; the value does not matter.)
1738 Visiting a file whose name matches REGEXP specifies FUNCTION as the
1739 mode function to use. FUNCTION will be called, unless it is nil.
1741 If the element has the form (REGEXP FUNCTION NON-NIL), then after
1742 calling FUNCTION (if it's not nil), we delete the suffix that matched
1788 "Alist mapping interpreter names to major modes.
1789 This alist applies to files whose first line starts with `#!'.
1790 Each element looks like (INTERPRETER . MODE).
1791 The car of each element is compared with
1792 the name of the interpreter specified in the first line.
1799 "List of regexps for what to ignore, for `inhibit-first-line-modes-regexps'.
1800 When checking `inhibit-first-line-modes-regexps', we first discard
1806 "Regular expression matching interpreters, for file mode determination.
1807 This regular expression is matched against the first line of a file
1808 to determine the file's mode in `set-auto-mode' when Emacs can't deduce
1809 a mode from the file's name. If it matches, the file is assumed to
1810 be interpreted by the interpreter matched by the second group of the
1811 regular expression. The mode is then determined as the mode associated
1815 "Select major mode appropriate for current buffer.
1816 This checks for a -*- mode tag in the buffer's text,
1817 compares the filename against the entries in `auto-mode-alist',
1818 or checks the interpreter that runs this file against
1819 `interpreter-mode-alist'.
1821 It does not check for the `mode:' local variable in the
1822 Local Variables section of the file; for that, use `hack-local-variables'.
1824 If `enable-local-variables' is nil, this function does not check for a
1825 -*- mode tag.
1827 If the optional argument JUST-FROM-FILE-NAME is non-nil,
1828 then we do not set anything but the major mode,
1829 and we don't even do that unless it would come from the file name."
1830 ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*-
1838 ;; Find all specifications for the `mode:' variable
1839 ;; and execute them left to right.
1851 modes)))
1852 ;; Simple -*-MODE-*- case.
1855 modes))))
1856 ;; If we found modes to use, invoke them now,
1857 ;; outside the save-excursion.
1864 ;; If we didn't find a mode from a -*- line, try using the file name.
1868 ;; Remove backup-suffixes from file name.
1874 ;; Find first matching alist entry.
1883 keep-going t)
1885 keep-going nil)))
1888 ;; When JUST-FROM-FILE-NAME is set,
1889 ;; we are working on behalf of set-visited-file-name.
1890 ;; In that case, if the major mode specified is the
1891 ;; same one we already have, don't actually reset it.
1892 ;; We don't want to lose minor modes such as Font Lock.
1895 ;; If we can't deduce a mode from the file name,
1896 ;; look for an interpreter specified in the first line.
1897 ;; As a special case, allow for things like "#!/bin/env perl",
1898 ;; which finds the interpreter anywhere in $PATH.
1905 elt)
1906 ;; Map interpreter name to a mode.
1908 interpreter-mode-alist))
1915 "Find the -*- spec in the buffer.
1916 Call with point at the place to start searching from.
1917 If one is found, set point to the beginning
1918 and return the position of the end.
1919 Otherwise, return nil; point may be changed."
1922 ;; Don't look for -*- if this file name matches any
1923 ;; of the regexps in inhibit-first-line-modes-regexps.
1931 sufs)
1939 ;; If the file begins with "#!"
1940 ;; (exec interpreter magic), look
1941 ;; for mode frobs in the first two
1942 ;; lines. You cannot necessarily
1943 ;; put them in the first line of
1944 ;; such a file without screwing up
1945 ;; the interpreter invocation.
1953 t))
1959 end))))
1962 "Set local variables specified in the -*- line.
1963 Ignore any specification for `mode:' and `coding:';
1964 `set-auto-mode' should already have handled `mode:',
1965 `set-auto-coding' should already have handled `coding:'.
1966 If MODE-ONLY is non-nil, all we do is check whether the major mode
1967 is specified, returning t if it is specified."
1972 mode-specified
1975 ;; Parse the -*- line into the RESULT alist.
1976 ;; Also set MODE-SPECIFIED if we see a spec or `mode'.
1978 nil)
1980 ;; Simple form: "-*- MODENAME -*-". Already handled.
1982 nil)
1984 ;; Hairy form: '-*-' [ <variable> ':' <value> ';' ]* '-*-'
1985 ;; (last ";" is optional).
1990 ;; There used to be a downcase here,
1991 ;; but the manual didn't say so,
1992 ;; and people want to set var names that aren't all lc.
1999 ;; It is traditional to ignore
2000 ;; case when checking for `mode' in set-auto-mode,
2001 ;; so we must do that here as well.
2002 ;; That is inconsistent, but we're stuck with it.
2003 ;; The same can be said for `coding' in set-auto-coding.
2021 ;; If we fail to switch in the selected window,
2022 ;; it is probably a minibuffer.
2023 ;; So try another window.
2034 nil))))
2037 "Normal hook run after processing a file's local variables specs.
2038 Major modes can use this to examine user-specified local variables
2042 "Parse and put into effect this buffer's local variables spec.
2043 If MODE-ONLY is non-nil, all we do is check whether the major mode
2044 is specified, returning t if it is specified."
2046 ;; If MODE-ONLY is t, we check here for specifying the mode
2047 ;; in the -*- line. If MODE-ONLY is nil, we process
2048 ;; the -*- line here.
2052 ;; Look for "Local variables:" line in last page.
2059 mode-only
2069 buffer-file-name)
2073 prefix prefixlen suffix beg
2074 mode-specified
2076 ;; The prefix is what comes before "local variables:" in its line.
2077 ;; The suffix is what comes after "local variables:" in its line.
2092 ;; Look at next local variable spec.
2095 ;; Skip the prefix, if any.
2100 ;; Find the variable name; strip whitespace.
2108 val)
2109 ;; Setting variable named "end" means end of list.
2112 ;; Otherwise read the variable value.
2123 ;; Set the variable. "Variables" mode and eval are funny.
2127 mode-specified))
2133 ;; Get confirmation before setting these variables as locals in a file.
2158 ;; Don't wait for outline.el to be loaded, for the sake of outline-minor-mode.
2188 ;; This case is safe because the user gets to check it before it is used.
2192 "Non-nil if SYM could be dangerous as a file-local variable with value VAL.
2193 If VAL is nil, the question is whether any value might be dangerous."
2197 (and (string-match "-hooks?$\\|-functions?$\\|-forms?$\\|-program$\\|-command$\\|-predicate$\\|font-lock-keywords$\\|font-lock-keywords-[0-9]+$\\|font-lock-syntactic-keywords$\\|-frame-alist$\\|-mode-alist$\\|-map$\\|-map-alist$"
2200 ;; If the safe-local-variable property isn't t or nil,
2201 ;; then it must return non-nil on the proposed value to be safe.
2208 Add expressions to this list if you want Emacs to evaluate them, when
2209 they appear in an `eval' local variable specification, without first
2210 asking you for confirmation."
2227 "Return t if it is safe to eval EXP when it is found in a file."
2229 ;; Detect certain `put' expressions.
2235 ;; Only allow safe values of lisp-indent-hook;
2236 ;; not functions.
2239 ;; Allow expressions that the user requested.
2241 ;; Certain functions can be allowed with safe arguments
2242 ;; or can specify verification functions to try.
2250 ok))
2258 ok)))))))
2262 A few patterns are specified so that any name which matches one
2263 is considered risky."
2268 ;; We have already handled coding: tag in set-auto-coding.
2269 nil)
2270 ;; "Setting" eval means either eval it or do nothing.
2271 ;; Likewise for setting hook variables.
2273 ;; Permit evalling a put of a harmless property.
2274 ;; if the args do nothing tricky.
2277 ;; Permit eval if not root and user says ok.
2296 ;; Ordinary variable, really set it.
2298 ;; Make sure the string has no text properties.
2299 ;; Some text properties can get evaluated in various ways,
2300 ;; so it is risky to put them on with a local variable list.
2305 \f
2308 However, the mode will not be changed if
2309 \(1) a local variables list or the `-*-' line specifies a major mode, or
2311 \ not suitable for ordinary files, or
2312 \(3) the new file name does not particularly specify any mode."
2317 "Change name of file visited in current buffer to FILENAME.
2318 The next time the buffer is saved it will go in the newly specified file.
2319 nil or empty string as argument means make buffer not be visiting any file.
2320 Remember to delete the initial contents of the minibuffer
2321 if you wish to pass an empty string as the argument.
2323 The optional second argument NO-QUERY, if non-nil, inhibits asking for
2324 confirmation in the case where another buffer is already visiting FILENAME.
2326 The optional third argument ALONG-WITH-FILE, if non-nil, means that
2327 the old visited file has been renamed to the new name FILENAME."
2335 nil
2346 filename)))
2360 ;; If new-name == old-name, renaming would add a spurious <2>
2361 ;; and it's considered as a feature in rename-buffer.
2367 ;; Abbreviate the file names of the buffer.
2376 nil)))
2377 ;; write-file-functions is normally used for things like ftp-find-file
2378 ;; that visit things that are not local files as if they were files.
2379 ;; Changing to visit an ordinary local file instead should flush the hook.
2384 ;; If buffer was read-only because of version control,
2385 ;; that reason is gone now, so make it writable.
2389 ;; Turn off backup files for certain file names.
2390 ;; Since this is a permanent local, the major mode won't eliminate it.
2397 ;; If auto-save was not already on, turn it on if appropriate.
2401 ;; If auto save is on, start using a new name.
2402 ;; We deliberately don't rename or delete the old auto save
2403 ;; for the old visited file name. This is because perhaps
2404 ;; the user wants to save the new state and then compare with the
2405 ;; previous state from the auto save file.
2408 ;; Rename the old auto save file if any.
2415 ;; Update the major mode, if the file name determines it.
2417 ;; Don't change the mode if it is special.
2420 ;; Don't change the mode if the local variable list specifies it.
2426 "Write current buffer into file FILENAME.
2427 This makes the buffer visit that file, and marks it as not modified.
2429 If you specify just a directory name as FILENAME, that means to use
2430 the default file name but in that directory. You can also yank
2431 the default file name into the minibuffer to edit it, using M-n.
2433 If the buffer is not already visiting a file, the default file name
2434 for the output file is the buffer name.
2436 If optional second arg CONFIRM is non-nil, this function
2437 asks for confirmation before overwriting an existing file.
2438 Interactively, confirmation is required unless you supply a prefix argument."
2439 ;; (interactive "FWrite file: ")
2443 nil nil nil nil)
2447 default-directory)
2448 nil nil))
2452 ;; If arg is just a directory,
2453 ;; use the default file name, but in that directory.
2464 ;; Make buffer writable if file is writable.
2469 \f
2471 "Make a backup of the disk file visited by the current buffer, if appropriate.
2472 This is normally done before saving the buffer the first time.
2474 A backup may be done by renaming or by copying; see documentation of
2475 variable `make-backup-files'. If it's done by renaming, then the file is
2476 no longer accessible under its old name.
2478 The value is non-nil after a backup was made by renaming.
2479 It has the form (MODES . BACKUPNAME).
2480 MODES is the result of `file-modes' on the original
2481 file; this means that the caller, after saving the buffer, should change
2482 the modes of the new file to agree with the old modes.
2483 BACKUPNAME is the backup file name, which is the old file renamed."
2490 backup-info backupname targets setmodes)
2491 ;; If specified name is a symbolic link, chase it to the target.
2492 ;; Thus we make the backups in the directory where the real file is.
2497 ;; (if (file-directory-p buffer-file-name)
2498 ;; (error "Cannot save buffer in directory %s" buffer-file-name))
2502 ;; If have old versions to maybe delete,
2503 ;; ask the user to confirm now, before doing anything.
2504 ;; But don't actually delete til later.
2509 real-file-name)))))
2511 ;; Actually write the back up file.
2514 ; (file-symlink-p buffer-file-name)
2515 backup-by-copying
2516 ;; Don't rename a suid or sgid file.
2530 ;; rename-file should delete old backup.
2534 ;; If trouble writing the backup, write it in ~.
2543 ;; Now delete the old versions, if desired.
2550 setmodes)
2557 ;; If copying fails because file TO-NAME
2558 ;; is not writable, delete that file and try again.
2566 "Return file NAME sans backup versions or strings.
2567 This is a separate procedure so your site-init or startup file can
2568 redefine it.
2569 If the optional argument KEEP-BACKUP-VERSION is non-nil,
2570 we do not remove backup version numbers, only true file version numbers."
2576 ;; VMS version number is (a) semicolon, optional
2577 ;; sign, zero or more digits or (b) period, option
2578 ;; sign, zero or more digits, provided this is the
2579 ;; second period encountered outside of the
2580 ;; device/directory part of the file name.
2583 name)
2593 "Return t if deleting FILE and rewriting it would preserve the owner."
2598 ;; Return t if the file doesn't exist, since it's true that no
2599 ;; information would be lost by an (attempted) delete and create.
2605 The extension, in a file name, is the part that follows the last `.',
2606 except that a leading `.', if any, doesn't count."
2609 directory)
2613 ;; Don't use expand-file-name here; if DIRECTORY is relative,
2614 ;; we don't want to expand it.
2617 filename))))
2621 The extension, in a file name, is the part that follows the last `.',
2622 except that a leading `.', if any, doesn't count.
2623 Return nil for extensionless file names such as `foo'.
2624 Return the empty string for file names such as `foo.'.
2626 If PERIOD is non-nil, then the returned value includes the period
2627 that delimits the extension, and if FILENAME has no extension,
2638 "A function to use instead of the default `make-backup-file-name'.
2639 A value of nil gives the default `make-backup-file-name' behaviour.
2641 This could be buffer-local to do something special for specific
2642 files. If you define it, you may need to change `backup-file-name-p'
2643 and `file-name-sans-versions' too.
2645 See also `backup-directory-alist'."
2651 "Alist of filename patterns and backup directory names.
2652 Each element looks like (REGEXP . DIRECTORY). Backups of files with
2653 names matching REGEXP will be made in DIRECTORY. DIRECTORY may be
2654 relative or absolute. If it is absolute, so that all matching files
2655 are backed up into the same directory, the file names in this
2656 directory will be the full name of the file backed up with all
2657 directory separators changed to `!' to prevent clashes. This will not
2658 work correctly if your filesystem truncates the resulting name.
2660 For the common case of all backups going into one directory, the alist
2662 directory name.
2664 If this variable is nil, or it fails to match a filename, the backup
2665 is made in the original file's directory.
2667 On MS-DOS filesystems without long names this variable is always
2668 ignored."
2674 "Default `backup-enable-predicate' function.
2675 Checks for files in `temporary-file-directory' or
2676 `small-temporary-file-directory'."
2679 ;; Directory is under temporary-file-directory.
2684 0 nil
2686 ;; Directory is under small-temporary-file-directory.
2691 "Create the non-numeric backup file name for FILE.
2692 Normally this will just be the file's name with `~' appended.
2693 Customization hooks are provided as follows.
2695 If the variable `make-backup-file-name-function' is non-nil, its value
2696 should be a function which will be called with FILE as its argument;
2697 the resulting name is used.
2699 Otherwise a match for FILE is sought in `backup-directory-alist'; see
2700 the documentation of that variable. If the directory for the backup
2701 doesn't exist, it is created."
2715 "Subroutine of `make-backup-file-name' and `find-backup-file-name'."
2717 elt backup-directory)
2722 alist nil)))
2728 file
2732 ;; Normalize DOSish file names: downcase the drive
2733 ;; letter, if any, and replace the leading "x:" with
2734 ;; "/drive_x".
2737 ;; Replace any invalid file-name characters (for the
2738 ;; case of backing up remote files).
2742 "drive_"
2745 ""
2748 ;; Make the name unique by substituting directory
2749 ;; separators. It may not really be worth bothering about
2750 ;; doubling `!'s in the original name...
2755 backup-directory))
2762 "Return non-nil if FILE is a backup file name (numeric or not).
2763 This is a separate function so you can redefine it for customization.
2764 You may need to redefine `file-name-sans-versions' as well."
2769 ;; This is used in various files.
2770 ;; The usage of backup-extract-version-start is not very clean,
2771 ;; but I can't see a good alternative, so as of now I am leaving it alone.
2773 "Given the name of a numeric backup file, FN, return the backup number.
2774 Uses the free variable `backup-extract-version-start', whose value should be
2775 the index in the name where the version number begins."
2781 ;; I believe there is no need to alter this behavior for VMS;
2782 ;; since backup files are not made on VMS, it should not get called.
2784 "Find a file name for a backup file FN, and suggestions for deletions.
2785 Value is a list whose car is the name for the backup file
2786 and whose cdr is a list of old versions to consider deleting now.
2787 If the value is nil, don't make a backup.
2788 Uses `backup-directory-alist' in the same way as does
2789 `make-backup-file-name'."
2791 ;; Run a handler for this function so that ange-ftp can refuse to do it.
2795 ;; We don't support numbered backups on plain MS-DOS
2796 ;; when long file names are unavailable.
2806 possibilities deserve-versions-p versions)
2809 base-versions
2812 possibilities)
2813 #'<)
2818 kept-old-versions
2819 kept-new-versions
2826 ;; Delete nothing if there is overflow
2827 ;; in the number of versions to keep.
2833 v))))))))))
2836 "Return number of names file FILENAME has."
2839 ;; (defun file-relative-name (filename &optional directory)
2840 ;; "Convert FILENAME to be relative to DIRECTORY (default: `default-directory').
2841 ;; This function returns a relative file name which is equivalent to FILENAME
2842 ;; when used with that default directory as the default.
2843 ;; If this is impossible (which can happen on MSDOS and Windows
2844 ;; when the file name and directory use different drive names)
2845 ;; then it returns FILENAME."
2846 ;; (save-match-data
2847 ;; (let ((fname (expand-file-name filename)))
2848 ;; (setq directory (file-name-as-directory
2849 ;; (expand-file-name (or directory default-directory))))
2850 ;; ;; On Microsoft OSes, if FILENAME and DIRECTORY have different
2851 ;; ;; drive names, they can't be relative, so return the absolute name.
2852 ;; (if (and (or (eq system-type 'ms-dos)
2853 ;; (eq system-type 'cygwin)
2854 ;; (eq system-type 'windows-nt))
2855 ;; (not (string-equal (substring fname 0 2)
2856 ;; (substring directory 0 2))))
2857 ;; filename
2858 ;; (let ((ancestor ".")
2859 ;; (fname-dir (file-name-as-directory fname)))
2860 ;; (while (and (not (string-match (concat "^" (regexp-quote directory)) fname-dir))
2861 ;; (not (string-match (concat "^" (regexp-quote directory)) fname)))
2862 ;; (setq directory (file-name-directory (substring directory 0 -1))
2863 ;; ancestor (if (equal ancestor ".")
2864 ;; ".."
2865 ;; (concat "../" ancestor))))
2866 ;; ;; Now ancestor is empty, or .., or ../.., etc.
2867 ;; (if (string-match (concat "^" (regexp-quote directory)) fname)
2868 ;; ;; We matched within FNAME's directory part.
2869 ;; ;; Add the rest of FNAME onto ANCESTOR.
2870 ;; (let ((rest (substring fname (match-end 0))))
2871 ;; (if (and (equal ancestor ".")
2872 ;; (not (equal rest "")))
2873 ;; ;; But don't bother with ANCESTOR if it would give us `./'.
2874 ;; rest
2875 ;; (concat (file-name-as-directory ancestor) rest)))
2876 ;; ;; We matched FNAME's directory equivalent.
2877 ;; ancestor))))))
2880 "Convert FILENAME to be relative to DIRECTORY (default: `default-directory').
2881 This function returns a relative file name which is equivalent to FILENAME
2882 when used with that default directory as the default.
2883 If FILENAME and DIRECTORY lie on different machines or on different drives
2884 on a DOS/Windows machine, it returns FILENAME on expanded form."
2888 default-directory))))
2896 ;; Test for different drives on DOS/Windows
2901 ;; Test for different remote file handlers
2903 ;; Test for different remote file system identification
2905 hf
2915 filename
2921 filename-dir))
2923 filename)))
2926 ".."
2928 ;; Now ancestor is empty, or .., or ../.., etc.
2930 ;; We matched within FILENAME's directory part.
2931 ;; Add the rest of FILENAME onto ANCESTOR.
2934 ;; But don't bother with ANCESTOR if it would give us `./'.
2935 rest
2937 ;; We matched FILENAME's directory equivalent.
2938 ancestor))))))
2939 \f
2941 "Save current buffer in visited file if modified. Versions described below.
2942 By default, makes the previous version into a backup file
2943 if previously requested or if this is the first save.
2945 to become a backup when the next save is done.
2947 unconditionally makes the previous version into a backup file.
2949 to become a backup when the next save is done,
2950 and unconditionally makes the previous version into a backup file.
2952 With argument of 0, never make the previous version into a backup file.
2954 If a file's name is FOO, the names of its numbered backup versions are
2955 FOO.~i~ for various integers i. A non-numbered backup file is called FOO~.
2956 Numeric backups (rather than FOO~) will be made if value of
2957 `version-control' is not the atom `never' and either there are already
2958 numeric versions of the file being backed up, or `version-control' is
2959 non-nil.
2960 We don't want excessive versions piling up, so there are variables
2961 `kept-old-versions', which tells Emacs how many oldest versions to keep,
2962 and `kept-new-versions', which tells how many newest versions to keep.
2963 Defaults are 2 old versions and 2 new.
2964 `dired-kept-versions' controls dired's clean-directory (.) command.
2965 If `delete-old-versions' is nil, system will query user
2966 before trimming versions. Otherwise it does it silently.
2968 If `vc-make-backup-files' is nil, which is the default,
2969 no backup files are made for files managed by version control.
2970 (This is because the version control system itself records previous versions.)
2972 See the subroutine `basic-save-buffer' for more information."
2985 "Delete auto-save file for current buffer if `delete-auto-save-files' is t.
2986 Normally delete only if the file was written by this Emacs since
2987 the last real save, but optional arg FORCE non-nil means delete anyway."
3001 "Normal hook that is run after a buffer is saved to its file."
3007 "If non-nil, use this coding system for saving the buffer.
3008 More precisely, use this coding system in place of the
3009 value of `buffer-file-coding-system', when saving the buffer.
3010 Calling `write-region' for any purpose other than saving the buffer
3011 will still use `buffer-file-coding-system'; this variable has no effect
3018 "Save the current buffer in its visited file, if it has been modified.
3019 The hooks `write-contents-functions' and `write-file-functions' get a chance
3020 to do the job of saving; if they do not, then the buffer is saved in
3021 the visited file file in the usual way.
3022 After saving the buffer, this function runs `after-save-hook'."
3025 ;; In an indirect buffer, save its base buffer instead.
3030 setmodes)
3031 ;; On VMS, rename file and buffer to get rid of version number.
3036 ;; Strip VMS version number before save.
3039 ;; Construct a (unique) buffer name to correspond.
3044 ;; If buffer has no file name, ask user for one.
3051 filename))
3076 ;; Support VC version backups.
3081 ;; If a hook returned t, file is already "written".
3082 ;; Otherwise, write it the usual way now.
3084 ;; Now we have saved the current buffer. Let's make sure
3085 ;; that buffer-file-coding-system is fixed to what
3086 ;; actually used for saving by binding it locally.
3096 ;; If the auto-save file was recent before this command,
3097 ;; delete it now.
3099 ;; Support VC `implicit' locking.
3104 ;; This does the "real job" of writing a buffer into its visited file
3105 ;; and making a backup file. This is what is normally done
3106 ;; but inhibited if one of write-file-functions returns non-nil.
3107 ;; It returns a value (MODES . BACKUPNAME), like backup-buffer.
3114 ;; This returns a value (MODES . BACKUPNAME), like backup-buffer.
3128 buffer-file-name)))
3136 ;; If file is precious, write temp name, then rename it.
3137 ;; This requires write access to the containing dir,
3138 ;; which is why we don't try it if we don't have that access.
3140 tempname nogood i succeed
3144 ;; Find the temporary name to write under.
3151 "%s$tmp$%d"
3153 dir i))
3159 tempname nil realname
3160 buffer-file-truename)
3162 ;; If writing the temp file fails,
3163 ;; delete the temp file.
3170 ;; Since we have created an entirely new file
3171 ;; and renamed it, make sure it gets the
3172 ;; right permission bits set.
3174 buffer-file-name)))
3175 ;; We succeeded in writing the temp file,
3176 ;; so rename it.
3178 ;; If file not writable, see if we can make it writable
3179 ;; temporarily while we write it.
3180 ;; But no need to do so if we have just backed it up
3181 ;; (setmodes is set) because that says we're superseding.
3183 ;; Change the mode back, after writing.
3190 buffer-file-name nil t buffer-file-truename)
3192 ;; If we get an error writing the new file, and we made
3193 ;; the backup by renaming, undo the backing-up.
3196 setmodes))
3199 "View the differences between BUFFER and its associated file.
3200 This requires the external program `diff' to be in your `exec-path'."
3215 ;; Display that message for 1 second so that user can read it
3216 ;; in the minibuffer.
3218 ;; return always nil, so that save-buffers-kill-emacs will not move
3219 ;; over to the next unsaved buffer when calling `d'.
3220 nil)
3223 '((?\C-r
3229 ;; Return nil to ask about BUF again.
3230 nil)
3232 (?d diff-buffer-with-file
3238 "Save some modified file-visiting buffers. Asks user about each one.
3239 You can answer `y' to save, `n' not to save, `C-r' to look at the
3240 buffer in question with `view-buffer' before deciding or `d' to
3241 view the differences using `diff-buffer-to-file'.
3243 Optional argument (the prefix) non-nil means save all with no questions.
3244 Optional second argument PRED determines which buffers are considered:
3245 If PRED is nil, all the file-visiting buffers are considered.
3246 If PRED is t, then certain non-file buffers will also be considered.
3247 If PRED is a zero-argument function, it indicates for each buffer whether
3248 to consider it or not when called with that buffer current.
3250 See `save-some-buffers-action-alist' if you want to
3251 change the additional actions you can take on files."
3270 t
3283 save-some-buffers-action-alist))
3290 abbrev-file-name)))
3292 ;; Don't keep bothering user if he says no.
3294 t))))
3297 \f
3299 "Mark current buffer as unmodified, not needing to be saved.
3302 It is not a good idea to use this function in Lisp programs, because it
3303 prints a message in the minibuffer. Instead, use `set-buffer-modified-p'."
3310 "Change whether this buffer is visiting its file read-only.
3311 With arg, set read-only iff arg is positive.
3312 If visiting file read-only and `view-read-only' is non-nil, enter view mode."
3317 nil ; do nothing.
3318 ;; Toggle.
3325 ;; If view-mode is already active, `view-mode-enter' is a nop.
3337 "Insert contents of file FILENAME into buffer after point.
3338 Set mark after the inserted text.
3340 This function is meant for the user to run interactively.
3341 Don't call it from programs! Use `insert-file-contents' instead.
3342 \(Its calling sequence is different; see its documentation)."
3347 "Append the contents of the region to the end of file FILENAME.
3348 When called from a function, expects three arguments,
3349 START, END and FILENAME. START and END are buffer positions
3350 saying what text to write."
3355 "Return most recent backup file for FILENAME or nil if no backups exist."
3356 ;; `make-backup-file-name' will get us the right directory for
3357 ;; ordinary or numeric backups. It might create a directory for
3358 ;; backups as a side-effect, according to `backup-directory-alist'.
3365 tem)
3374 newest))
3377 "Rename current buffer to a similar name not already taken.
3378 This function is useful for creating multiple shell process buffers
3379 or multiple mail buffers, etc."
3387 ;; If the existing buffer name has a <NNN>,
3388 ;; which isn't part of the file name (if any),
3389 ;; then get rid of that.
3395 "Create the directory DIR and any nonexistent parent dirs.
3396 Interactively, the default choice of directory to create
3397 is the current default directory for file names.
3398 That is useful when you have visited a file in a nonexistent directory.
3400 Noninteractively, the second (optional) argument PARENTS says whether
3401 to create parent directories if they don't exist."
3404 nil nil)
3405 t))
3406 ;; If default-directory is a remote directory,
3407 ;; make sure we find its make-directory handler.
3415 create-list)
3422 \f
3425 "Function to use to revert this buffer, or nil to do the default.
3426 The function receives two arguments IGNORE-AUTO and NOCONFIRM,
3431 "Function to use to insert contents when reverting this buffer.
3432 Gets two args, first the nominal file name to use,
3433 and second, t if reading the auto-save file.
3438 "Normal hook for `revert-buffer' to run before reverting.
3439 If `revert-buffer-function' is used to override the normal revert
3443 "Normal hook for `revert-buffer' to run after reverting.
3444 Note that the hook value that it runs is the value that was in effect
3445 before reverting; that makes a difference if you have buffer-local
3446 hook functions.
3448 If `revert-buffer-function' is used to override the normal revert
3454 "Replace current buffer text with the text of the visited file on disk.
3455 This undoes all changes since the file was visited or saved.
3456 With a prefix argument, offer to revert from latest auto-save file, if
3457 that is more recent than the visited file.
3459 This command also works for special buffers that contain text which
3460 doesn't come from a file, but reflects some other data base instead:
3461 for example, Dired buffers and `buffer-list' buffers. In these cases,
3462 it reconstructs the buffer contents from the appropriate data base.
3464 When called from Lisp, the first argument is IGNORE-AUTO; only offer
3465 to revert from the auto-save file when this is nil. Note that the
3466 sense of this argument is the reverse of the prefix argument, for the
3467 sake of backward compatibility. IGNORE-AUTO is optional, defaulting
3468 to nil.
3470 Optional second argument NOCONFIRM means don't ask for confirmation at
3471 all. (The local variable `revert-without-query', if non-nil, prevents
3472 confirmation.)
3474 Optional third argument PRESERVE-MODES non-nil means don't alter
3475 the files modes. Normally we reinitialize them using `normal-mode'.
3477 If the value of `revert-buffer-function' is non-nil, it is called to
3478 do all the work for this command. Otherwise, the hooks
3479 `before-revert-hook' and `after-revert-hook' are run at the beginning
3480 and the end, and if `revert-buffer-insert-file-contents-function' is
3481 non-nil, it is called instead of rereading visited file contents."
3483 ;; I admit it's odd to reverse the sense of the prefix argument, but
3484 ;; there is a lot of code out there which assumes that the first
3485 ;; argument should be t to avoid consulting the auto-save file, and
3486 ;; there's no straightforward way to encourage authors to notice a
3487 ;; reversal of the argument sense. So I'm just changing the user
3488 ;; interface, but leaving the programmatic interface the same.
3494 buffer-auto-save-file-name
3499 buffer-auto-save-file-name
3500 buffer-file-name)))
3511 found))
3513 file-name)))
3515 ;; If file was backed up but has changed since,
3516 ;; we shd make another backup.
3520 ;; Get rid of all undo records for this buffer.
3523 ;; Effectively copy the after-revert-hook status,
3524 ;; since after-find-file will clobber it.
3528 after-revert-hook)))
3530 ;; Don't make undo records for the reversion.
3534 file-name auto-save-p)
3537 "File %s no longer exists!"
3539 file-name))
3540 ;; Bind buffer-file-name to nil
3541 ;; so that we don't try to lock the file.
3547 ;; Auto-saved file shoule be read without
3548 ;; any code conversion.
3551 buffer-file-coding-system))))
3552 ;; This force after-insert-file-set-coding
3553 ;; (called from insert-file-contents) to set
3554 ;; buffer-file-coding-system to a proper value.
3557 ;; Note that this preserves point in an intelligent way.
3561 nil nil t))
3563 nil nil t)))))
3564 ;; Recompute the truename in case changes in symlinks
3565 ;; have changed the truename.
3569 ;; Run after-revert-hook as it was before we reverted.
3573 local-hook)
3576 t)))))
3579 "Recover the visited file--get contents from its last auto-save file."
3584 "Visit file FILE, but get contents from its last auto-save file."
3585 ;; Actually putting the file name in the minibuffer should be used
3586 ;; only rarely.
3587 ;; Not just because users often use the default.
3607 ;; Use insert-directory-safely, not insert-directory,
3608 ;; because these files might not exist. In particular,
3609 ;; FILE might not exist if the auto-save file was for
3610 ;; a buffer that didn't visit a file, such as "*mail*".
3611 ;; The code in v20.x called `ls' directly, so we need
3612 ;; to emulate what `ls' did in that case.
3618 ;; Keep the current buffer-file-coding-system.
3620 ;; Auto-saved file shoule be read without any code conversion.
3629 "Recover auto save files from a previous Emacs session.
3630 This command first displays a Dired buffer showing you the
3631 previous sessions that you could recover from.
3632 To choose one, move point to the proper line and then type C-c C-c.
3633 Then you'll be asked about a number of files to recover."
3643 auto-save-list-file-prefix)))
3644 t)
3653 ;; Each line starts with a space
3654 ;; so that Font Lock mode won't highlight the first character.
3663 "Choose one saved session to recover auto-save files from.
3664 This command is used in the special Dired buffer created by
3667 ;; Get the name of the session file to recover from.
3669 files
3675 ;; Read in the auto-save-list file.
3679 ;; Loop thru the text of that file
3680 ;; and get out the names of the files to recover.
3684 ;; This is a pair of lines for a non-file-visiting buffer.
3685 ;; Get the auto-save file name and manufacture
3686 ;; a "visited file name" from that.
3702 ;; This pair of lines is a file-visiting
3703 ;; buffer. Use the visited file name.
3713 ;; Ignore a file if its auto-save file does not exist now.
3717 ;; The file contains a pair of line for each auto-saved buffer.
3718 ;; The first line of the pair contains the visited file name
3719 ;; or is empty if the buffer was not visiting a file.
3720 ;; The second line is the auto-save file name.
3728 files
3734 "For each buffer in LIST, ask whether to kill it.
3735 LIST defaults to all existing live buffers."
3746 name
3751 \f
3753 "Toggle auto-saving of contents of current buffer.
3754 With prefix argument ARG, turn auto-saving on if positive, else off."
3759 ;; If auto-save is off because buffer has shrunk,
3760 ;; then toggling should turn it on.
3765 buffer-file-name
3767 ;; If -1 was stored here, to temporarily turn off saving,
3768 ;; turn it back on.
3774 buffer-auto-save-file-name)
3777 "Adjust current buffer's auto save file name for current conditions.
3778 Also rename any existing auto save file, if it was made in this session."
3790 "Return file name to use for auto-saves of current buffer.
3791 Does not consider `auto-save-visited-file-name' as that variable is checked
3792 before calling this function. You can redefine this for customization.
3793 See also `auto-save-file-name-p'."
3797 result uniq)
3798 ;; Apply user-specified translations
3799 ;; to the file name.
3803 filename)
3813 filename))))
3818 ;; We truncate the file name to DOS 8+3 limits
3819 ;; before doing anything else, because the regexp
3820 ;; passed to string-match below cannot handle
3821 ;; extensions longer than 3 characters, multiple
3822 ;; dots, and other atrocities.
3827 fn)
3832 "#"
3835 ;; Make sure auto-save file names don't contain characters
3836 ;; invalid for the underlying filesystem.
3838 ;; Don't modify remote (ange-ftp) filenames
3841 result))
3843 ;; Deal with buffers that don't have any associated files. (Mail
3844 ;; mode tends to create a good number of these.)
3848 file-name)
3849 ;; Eliminate all slashes and backslashes by
3850 ;; replacing them with sequences that start with %.
3851 ;; Quote % also, to keep distinct names distinct.
3860 ;; Generate the file name.
3866 ;; Try a few alternative directories, to get one we can
3867 ;; write it.
3873 ;; Don't modify remote (ange-ftp) filenames
3875 ;; The call to convert-standard-filename is in case
3876 ;; buffer-name includes characters not allowed by the
3877 ;; DOS/Windows filesystems. make-temp-file writes to the
3878 ;; file it creates, so we must fix the file name _before_
3879 ;; make-temp-file is called.
3881 fname))
3883 ;; make-temp-file creates the file,
3884 ;; but we don't want it to exist until we do an auto-save.
3888 file-name)))
3891 "Return non-nil if FILENAME can be yielded by `make-auto-save-file-name'.
3892 FILENAME should lack slashes. You can redefine this for customization."
3894 \f
3896 "Given a shell file name pattern WILDCARD, return an equivalent regexp.
3897 The generated regexp will match a filename iff the filename
3898 matches that wildcard according to shell rules. Only wildcards known
3899 by `sh' are supported."
3901 ;; Copy the initial run of non-special characters.
3904 ;; If no special characters, we're almost done.
3908 j)
3910 result
3931 ;; Found "[^". Insert a `\0' character
3932 ;; (which cannot happen in a filename)
3933 ;; into the character class, so that `^'
3934 ;; is not the first character after `[',
3935 ;; and thus non-special in a regexp.
3940 ;; I don't think `]' can appear in a
3941 ;; character class in a wildcard, but
3942 ;; let's be general here.
3949 i
3962 ;; Shell wildcards should match the entire filename,
3963 ;; not its part. Make the regexp say so.
3965 \f
3968 "*Switches for `list-directory' to pass to `ls' for brief listing."
3974 "/PROTECTION/SIZE/DATE/OWNER/WIDTH=(OWNER:10)"
3976 "*Switches for `list-directory' to pass to `ls' for verbose listing."
3981 "Expand wildcard pattern PATTERN.
3982 This returns a list of file names which match the pattern.
3984 If PATTERN is written as an absolute relative file name,
3985 the values are absolute also.
3987 If PATTERN is written as a relative file name, it is interpreted
3988 relative to the current default directory, `default-directory'.
3989 The file names returned are normally also relative to the current
3990 default directory. However, if FULL is non-nil, they are absolute."
3994 ;; A list of all dirs that DIRPART specifies.
3995 ;; This can be more than one dir
3996 ;; if DIRPART contains wildcards.
4001 contents)
4006 ;; Filter out "." and ".."
4011 name))
4018 this-dir-contents)
4019 this-dir-contents)
4020 contents))))
4022 contents)))
4025 "Display a list of files in or matching DIRNAME, a la `ls'.
4026 DIRNAME is globbed by the shell if necessary.
4027 Prefix arg (second arg if noninteractive) means supply -l switch to `ls'.
4028 Actions controlled by variables `list-directory-brief-switches'
4029 and `list-directory-verbose-switches'."
4033 nil default-directory nil)
4034 pfx)))
4036 list-directory-brief-switches))
4037 buffer)
4050 ;; Finishing with-output-to-temp-buffer seems to clobber default-directory.
4058 "Quote characters special to the shell in PATTERN, leave wildcards alone.
4060 PATTERN is assumed to represent a file-name wildcard suitable for the
4061 underlying filesystem. For Unix and GNU/Linux, the characters from the
4063 the parts of the pattern which don't include wildcard characters are
4064 quoted with double quotes.
4065 Existing quote characters in PATTERN are left alone, so you can pass
4066 PATTERN that already quotes some of the special characters."
4070 ;; DOS/Windows don't allow `"' in file names. So if the
4071 ;; argument has quotes, we can safely assume it is already
4072 ;; quoted by the caller.
4074 ;; We quote [&()#$'] in case their shell is a port of a
4075 ;; Unixy shell. We quote [,=+] because stock DOS and
4076 ;; Windows shells require that in some cases, such as
4077 ;; passing arguments to batch files that use positional
4078 ;; arguments like %1.
4080 pattern
4083 end)
4100 pattern))))
4107 "*Program to get the amount of free space on a file system.
4108 We assume the output has the format of `df'.
4109 The value of this variable must be just a command name or file name;
4110 if you want to specify options, use `directory-free-space-args'.
4112 A value of nil disables this feature.
4114 If the function `file-system-info' is defined, it is always used in
4115 preference to the program given by this variable."
4121 "*Options to use when running `directory-free-space-program'."
4126 "Return the mount of free space on directory DIR's file system.
4127 The result is a string that gives the number of free 1KB blocks,
4128 or nil if the system call or the program which retrieve the infornmation
4129 fail.
4131 This function calls `file-system-info' if it is available, or invokes the
4132 program specified by `directory-free-space-program' if that is non-nil."
4133 ;; Try to find the number of free blocks. Non-Posix systems don't
4134 ;; always have df, but might have an equivalent system call.
4143 nil t nil
4144 directory-free-space-args
4145 dir)))
4146 ;; Usual format is a header line followed by a line of
4147 ;; numbers.
4152 ;; Move to the end of the "available blocks" number.
4155 ;; Copy it into AVAILABLE.
4161 ;; insert-directory
4162 ;; - must insert _exactly_one_line_ describing FILE if WILDCARD and
4163 ;; FULL-DIRECTORY-P is nil.
4164 ;; The single line of output must display FILE's name as it was
4165 ;; given, namely, an absolute path name.
4166 ;; - must insert exactly one line for each file if WILDCARD or
4167 ;; FULL-DIRECTORY-P is t, plus one optional "total" line
4168 ;; before the file lines, plus optional text after the file lines.
4169 ;; Lines are delimited by "\n", so filenames containing "\n" are not
4170 ;; allowed.
4171 ;; File lines should display the basename.
4172 ;; - must be consistent with
4173 ;; - functions dired-move-to-filename, (these two define what a file line is)
4174 ;; dired-move-to-end-of-filename,
4175 ;; dired-between-files, (shortcut for (not (dired-move-to-filename)))
4176 ;; dired-insert-headerline
4177 ;; dired-after-subdir-garbage (defines what a "total" line is)
4178 ;; - variable dired-subdir-regexp
4179 ;; - may be passed "--dired" as the first argument in SWITCHES.
4180 ;; Filename handlers might have to remove this switch if their
4181 ;; "ls" command does not support it.
4183 "Insert directory listing for FILE, formatted according to SWITCHES.
4184 Leaves point after the inserted text.
4185 SWITCHES may be a string of options, or a list of strings.
4186 Optional third arg WILDCARD means treat FILE as shell wildcard.
4187 Optional fourth arg FULL-DIRECTORY-P means file is a directory and
4188 switches do not contain `d', so that a full listing is expected.
4190 This works by running a directory listing program
4191 whose name is in the variable `insert-directory-program'.
4192 If WILDCARD, it also runs the shell specified by `shell-file-name'."
4193 ;; We need the directory in order to find the right handler.
4198 wildcard full-directory-p)
4203 ;; Read the actual directory using `insert-directory-program'.
4204 ;; RESULT gets the status code.
4206 ;; putting text property `dired-filename, decode one
4207 ;; bunch by one to preserve that property.
4209 ;; This is to control encoding the arguments in call-process.
4213 default-file-name-coding-system))))
4216 ;; Run ls in the directory part of the file pattern
4217 ;; using the last component as argument.
4224 shell-file-name nil t nil
4225 "-c"
4227 ""
4229 insert-directory-program
4230 " -d "
4232 switches
4234 " -- "
4235 ;; Quote some characters that have
4236 ;; special meanings in shells; but
4237 ;; don't quote the wildcards--we want
4238 ;; them to be special. We also
4239 ;; currently don't quote the quoting
4240 ;; characters in case people want to
4241 ;; use them explicitly to quote
4242 ;; wildcard characters.
4244 ;; SunOS 4.1.3, SVr4 and others need the "." to list the
4245 ;; directory if FILE is a symbolic link.
4247 insert-directory-program nil t nil
4251 ;; Split the switches at any spaces so we can
4252 ;; pass separate options as separate args.
4254 ;; Avoid lossage if FILE starts with `-'.
4262 file))))))))
4264 ;; If `insert-directory-program' failed, signal an error.
4266 ;; On non-Posix systems, we cannot open a directory, so
4267 ;; don't even try, because that will always result in
4268 ;; the ubiquitous "Access denied". Instead, show the
4269 ;; command line so the user can try to guess what went wrong.
4274 insert-directory-program
4276 file result)
4277 ;; Unix. Access the file to get a suitable error.
4294 ;; It seems that we can't trust ls's output as to
4295 ;; byte positions of filenames.
4302 ;; Now decode what read if necessary.
4304 file-name-coding-system
4305 default-file-name-coding-system
4307 val pos)
4311 ;; If no coding system is specified or detection is
4312 ;; requested, detect the coding.
4330 ;; Try to insert the amount of free space.
4333 ;; First find the line to put it on.
4337 ;; Replace "total" with "used", to avoid confusion.
4344 "Insert directory listing for FILE, formatted according to SWITCHES.
4346 Like `insert-directory', but if FILE does not exist, it inserts a
4347 message to that effect instead of signaling an error."
4350 ;; Simulate the message printed by `ls'.
4354 "Functions to call with no arguments to query about killing Emacs.
4355 If any of these functions returns nil, killing Emacs is cancelled.
4357 but `kill-emacs', the low level primitive, does not.
4361 "How to ask for confirmation when leaving Emacs.
4362 If nil, the default, don't ask at all. If the value is non-nil, it should
4363 be a predicate function such as `yes-or-no-p'."
4371 "Offer to save each buffer, then kill this Emacs process.
4372 With prefix arg, silently save all file-visiting buffers, then kill."
4381 ;; process-list is not defined on VMS.
4383 active)
4392 ;; Query the user for other things, perhaps.
4397 \f
4398 ;; We use /: as a prefix to "quote" a file name
4399 ;; so that magic file name handlers will not apply to it.
4403 file-name-handler-alist))
4405 ;; We depend on being the last handler on the list,
4406 ;; so that anything else which does need handling
4407 ;; has been handled already.
4408 ;; So it is safe for us to inhibit *all* magic file name handlers.
4417 default-directory))
4418 ;; Get a list of the indices of the args which are file names.
4421 ;; The first five are special because they
4422 ;; return a file name. We want to include the /:
4423 ;; in the return value.
4424 ;; So just avoid stripping it in the first place.
4430 ;; `identity' means just return the first arg
4431 ;; as stripped of its quoting.
4439 ;; For all other operations, treat the first argument only
4440 ;; as the file name.
4442 ;; Copy ARGUMENTS so we can replace elements in it.
4444 ;; Strip off the /: from the file names that have this handler.
4452 "/"
4458 \f
4482 ;;; files.el ends here