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1 ;;; files.el --- file input and output commands for Emacs
3 ;; Copyright (C) 1985-1987, 1992-2012 Free Software Foundation, Inc.
5 ;; Maintainer: FSF
6 ;; Package: emacs
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 3 of the License, or
13 ;; (at your option) 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. If not, see <http://www.gnu.org/licenses/>.
23 ;;; Commentary:
25 ;; Defines most of Emacs's file- and directory-handling functions,
26 ;; including basic file visiting, backup generation, link handling,
27 ;; ITS-id version control, load- and write-hook handling, and the like.
29 ;;; Code:
36 "Backups of edited data files."
40 "Finding files."
45 "Non-nil means delete auto-save file when a buffer is saved or killed.
47 Note that the auto-save file will not be deleted if the buffer is killed
48 when it has unsaved changes."
53 nil
54 "Alist of abbreviations for file directories.
55 A list of elements of the form (FROM . TO), each meaning to replace
56 FROM with TO when it appears in a directory name. This replacement is
57 done when setting up the default directory of a newly visited file.
59 FROM is matched against directory names anchored at the first
63 FROM and TO should be equivalent names, which refer to the
64 same directory. Do not use `~' in the TO strings;
65 they should be ordinary absolute directory names.
67 Use this feature when you have directories which you normally refer to
68 via absolute symbolic links. Make TO the name of the link, and FROM
69 the name it is linked to."
78 "Non-nil means make a backup of a file the first time it is saved.
79 This can be done by renaming the file or by copying.
81 Renaming means that Emacs renames the existing file so that it is a
82 backup file, then writes the buffer into a new file. Any other names
83 that the old file had will now refer to the backup file. The new file
84 is owned by you and its group is defaulted.
86 Copying means that Emacs copies the existing file into the backup
87 file, then writes the buffer on top of the existing file. Any other
88 names that the old file had will now refer to the new (edited) file.
89 The file's owner and group are unchanged.
91 The choice of renaming or copying is controlled by the variables
92 `backup-by-copying', `backup-by-copying-when-linked',
93 `backup-by-copying-when-mismatch' and
94 `backup-by-copying-when-privileged-mismatch'. See also `backup-inhibited'."
98 ;; Do this so that local variables based on the file name
99 ;; are not overridden by the major mode.
101 "Non-nil means don't make a backup, regardless of the other parameters.
102 This variable is intended for use by making it local to a buffer.
107 "Non-nil means always use copying to create backup files.
108 See documentation of variable `make-backup-files'."
113 "Non-nil means use copying to create backups for files with multiple names.
114 This causes the alternate names to refer to the latest version as edited.
115 This variable is relevant only if `backup-by-copying' is nil."
120 "Non-nil means create backups by copying if this preserves owner or group.
121 Renaming may still be used (subject to control of other variables)
122 when it would not result in changing the owner or group of the file;
123 that is, for files which are owned by you and whose group matches
124 the default for a new file created there by you.
125 This variable is relevant only if `backup-by-copying' is nil."
132 "Non-nil means create backups by copying to preserve a privileged owner.
133 Renaming may still be used (subject to control of other variables)
134 when it would not result in changing the owner of the file or if the owner
135 has a user id greater than the value of this variable. This is useful
136 when low-numbered uid's are used for special system users (such as root)
137 that must maintain ownership of certain files.
138 This variable is relevant only if `backup-by-copying' and
139 `backup-by-copying-when-mismatch' are nil."
144 "Predicate that looks at a file name and decides whether to make backups.
148 "Non-nil in a buffer means always offer to save buffer on exit.
149 Do so even if the buffer is not visiting a file.
150 Automatically local in all buffers."
157 "Non-nil means find a file under alternative names, in existing buffers.
158 This means if any existing buffer is visiting the file you want
159 under another name, you get the existing buffer instead of a new buffer."
164 "Non-nil means visit a file under its truename.
165 The truename of a file is found by chasing all links
166 both at the file level and at the levels of the containing directories."
172 "Specify which files should be reverted without query.
173 The value is a list of regular expressions.
174 If the file name matches one of these regular expressions,
175 then `revert-buffer' reverts the file without querying
176 if the file has changed on disk and you have not edited the buffer."
181 "The device number and file number of the file visited in the current buffer.
182 The value is a list of the form (FILENUM DEVNUM).
183 This pair of numbers uniquely identifies the file.
197 "The directory for writing small temporary files.
198 If non-nil, this directory is used instead of `temporary-file-directory'
199 by programs that create small temporary files. This is for systems that
200 have fast storage with limited space, such as a RAM disk."
205 ;; The system null device. (Should reference NULL_DEVICE from C.)
233 "Non-nil means protect against I/O errors while saving files.
234 Some modes set this non-nil in particular buffers.
236 This feature works by writing the new contents into a temporary file
237 and then renaming the temporary file to replace the original.
238 In this way, any I/O error in writing leaves the original untouched,
239 and there is never any instant where the file is nonexistent.
241 Note that this feature forces backups to be made by copying.
242 Yet, at the same time, saving a precious file
243 breaks any hard links between it and other files.
245 This feature is advisory: for example, if the directory in which the
246 file is being saved is not writable, Emacs may ignore a non-nil value
247 of `file-precious-flag' and write directly into the file.
249 See also: `break-hardlink-on-save'."
254 "Non-nil means when saving a file that exists under several names
255 \(i.e., has multiple hardlinks), break the hardlink associated with
256 `buffer-file-name' and write to a new file, so that the other
257 instances of the file are not affected by the save.
259 If `buffer-file-name' refers to a symlink, do not break the symlink.
261 Unlike `file-precious-flag', `break-hardlink-on-save' is not advisory.
262 For example, if the directory in which a file is being saved is not
263 itself writable, then error instead of saving in some
264 hardlink-nonbreaking way.
266 See also `backup-by-copying' and `backup-by-copying-when-linked'."
272 "Control use of version numbers for backup files.
273 When t, make numeric backup versions unconditionally.
274 When nil, make them for files that have some already.
275 The value `never' means do not make them."
285 "When cleaning directory, number of versions to keep."
291 "If t, delete excess backup versions silently.
292 If nil, ask confirmation. Any other value prevents any trimming."
299 "Number of oldest versions to keep when a new numbered backup is made."
305 "Number of newest versions to keep when a new numbered backup is made.
306 Includes the new backup. Must be > 0"
312 "Whether to add a newline automatically at the end of the file.
314 A value of t means do this only when the file is about to be saved.
315 A value of `visit' means do this right after the file is visited.
316 A value of `visit-save' means do it at both of those times.
317 Any other non-nil value means ask user whether to add a newline, when saving.
318 A value of nil means don't add newlines.
320 Certain major modes set this locally to the value obtained
321 from `mode-require-final-newline'."
330 "Whether to add a newline at end of file, in certain major modes.
331 Those modes set `require-final-newline' to this value when you enable them.
332 They do so because they are often used for files that are supposed
333 to end in newlines, and the question is how to arrange that.
335 A value of t means do this only when the file is about to be saved.
336 A value of `visit' means do this right after the file is visited.
337 A value of `visit-save' means do it at both of those times.
338 Any other non-nil value means ask user whether to add a newline, when saving.
340 A value of nil means do not add newlines. That is a risky choice in this
341 variable since this value is used for modes for files that ought to have
342 final newlines. So if you set this to nil, you must explicitly check and
343 add a final newline, whenever you save a file that really needs one."
353 "Non-nil says by default do auto-saving of every file-visiting buffer."
359 ;; Don't put "\\2" inside expand-file-name, since it will be
360 ;; transformed to "/2" on DOS/Windows.
362 "Transforms to apply to buffer file name before making auto-save file name.
363 Each transform is a list (REGEXP REPLACEMENT UNIQUIFY):
364 REGEXP is a regular expression to match against the file name.
365 If it matches, `replace-match' is used to replace the
366 matching part with REPLACEMENT.
367 If the optional element UNIQUIFY is non-nil, the auto-save file name is
368 constructed by taking the directory part of the replaced file-name,
369 concatenated with the buffer file name with all directory separators
370 changed to `!' to prevent clashes. This will not work
371 correctly if your filesystem truncates the resulting name.
373 All the transforms in the list are tried, in the order they are listed.
374 When one transform applies, its result is final;
375 no further transforms are tried.
377 The default value is set up to put the auto-save file into the
378 temporary directory (see the variable `temporary-file-directory') for
379 editing a remote file.
381 On MS-DOS filesystems without long names this variable is always
382 ignored."
390 "Non-nil means save word abbrevs too when files are saved.
391 If `silently', don't ask the user before saving."
396 "Non-nil means allow `find-file' to visit directories.
397 To visit the directory, `find-file' runs `find-directory-functions'."
402 "List of functions to try in sequence to visit a directory.
403 Each function is called with the directory name as the sole argument
404 and should return either a buffer or nil."
408 ;; FIXME: also add a hook for `(thing-at-point 'filename)'
410 "List of functions to try in sequence to get a file name at point.
411 Each function should return either nil or a file name found at the
412 location of point in the current buffer."
416 ;;;It is not useful to make this a local variable.
417 ;;;(put 'find-file-not-found-hooks 'permanent-local t)
419 "List of functions to be called for `find-file' on nonexistent file.
420 These functions are called as soon as the error is detected.
421 Variable `buffer-file-name' is already set up.
426 ;;;It is not useful to make this a local variable.
427 ;;;(put 'find-file-hooks 'permanent-local t)
430 "List of functions to be called after a buffer is loaded from a file.
431 The buffer's local variables (if any) will have been processed before the
432 functions are called."
439 "List of functions to be called before writing out a buffer to a file.
440 If one of them returns non-nil, the file is considered already written
441 and the rest are not called.
442 These hooks are considered to pertain to the visited file.
443 So any buffer-local binding of this variable is discarded if you change
445 change the major mode.
447 This hook is not run if any of the functions in
448 `write-contents-functions' returns non-nil. Both hooks pertain
449 to how to save a buffer to file, for instance, choosing a suitable
450 coding system and setting mode bits. (See Info
451 node `(elisp)Saving Buffers'.) To perform various checks or
462 "List of functions to be called before writing out a buffer to a file.
463 If one of them returns non-nil, the file is considered already written
464 and the rest are not called and neither are the functions in
465 `write-file-functions'.
467 This variable is meant to be used for hooks that pertain to the
468 buffer's contents, not to the particular visited file; thus,
469 `set-visited-file-name' does not clear this variable; but changing the
470 major mode does clear it.
472 For hooks that _do_ pertain to the particular visited file, use
473 `write-file-functions'. Both this variable and
474 `write-file-functions' relate to how a buffer is saved to file.
475 To perform various checks or updates before the buffer is saved,
482 "Control use of local variables in files you visit.
483 The value can be t, nil, :safe, :all, or something else.
485 A value of t means file local variables specifications are obeyed
486 if all the specified variable values are safe; if any values are
487 not safe, Emacs queries you, once, whether to set them all.
488 \(When you say yes to certain values, they are remembered as safe.)
490 :safe means set the safe variables, and ignore the rest.
491 :all means set all variables, whether safe or not.
492 (Don't set it permanently to :all.)
493 A value of nil means always ignore the file local variables.
495 Any other value means always query you once whether to set them all.
496 \(When you say yes to certain values, they are remembered as safe, but
499 This variable also controls use of major modes specified in
500 a -*- line.
503 always obeys file local variable specifications and the -*- line,
504 and ignores this variable."
505 :risky t
513 ;; This is an odd variable IMO.
514 ;; You might wonder why it is needed, when we could just do:
515 ;; (set (make-local-variable 'enable-local-variables) nil)
516 ;; These two are not precisely the same.
517 ;; Setting this variable does not cause -*- mode settings to be
518 ;; ignored, whereas setting enable-local-variables does.
519 ;; Only three places in Emacs use this variable: tar and arc modes,
520 ;; and rmail. The first two don't need it. They already use
521 ;; inhibit-local-variables-regexps, which is probably enough, and
522 ;; could also just set enable-local-variables locally to nil.
523 ;; Them setting it has the side-effect that dir-locals cannot apply to
524 ;; eg tar files (?). FIXME Is this appropriate?
525 ;; AFAICS, rmail is the only thing that needs this, and the only
526 ;; reason it uses it is for BABYL files (which are obsolete).
527 ;; These contain "-*- rmail -*-" in the first line, which rmail wants
528 ;; to respect, so that find-file on a BABYL file will switch to
529 ;; rmail-mode automatically (this is nice, but hardly essential,
530 ;; since most people are used to explicitly running a command to
531 ;; access their mail; M-x gnus etc). Rmail files may happen to
532 ;; contain Local Variables sections in messages, which Rmail wants to
533 ;; ignore. So AFAICS the only reason this variable exists is for a
534 ;; minor convenience feature for handling of an obsolete Rmail file format.
536 "Like `enable-local-variables' but meant for buffer-local bindings.
537 The meaningful values are nil and non-nil. The default is non-nil.
538 If a major mode sets this to nil, buffer-locally, then any local
539 variables list in a file visited in that mode will be ignored.
541 This variable does not affect the use of major modes specified
546 The value can be t, nil or something else.
547 A value of t means obey `eval' variables.
548 A value of nil means ignore them; anything else means query."
549 :risky t
555 ;; Avoid losing in versions where CLASH_DETECTION is disabled.
564 "Non-nil means buffers visiting files read-only do so in view mode.
565 In fact, this means that all read-only buffers normally have
566 View mode enabled, including buffers that are read-only because
567 you visit a file you cannot alter, and buffers you make read-only
573 "History list of file names entered in the minibuffer.
575 Maximum length of the history list is determined by the value
577 \f
580 "Provides support for ange-ftp host name completion.
581 Runs the usual ange-ftp hook, but only for completion operations."
582 ;; Having this here avoids the need to load ange-ftp when it's not
583 ;; really in use.
589 inhibit-file-name-handlers)))
597 "Convert a standard file's name to something suitable for the OS.
598 This means to guarantee valid names and perhaps to canonicalize
599 certain patterns.
601 FILENAME should be an absolute file name since the conversion rules
602 sometimes vary depending on the position in the file name. E.g. c:/foo
603 is a valid DOS file name, but c:/bar/c:/foo is not.
605 This function's standard definition is trivial; it just returns
606 the argument. However, on Windows and DOS, replace invalid
607 characters. On DOS, make sure to obey the 8.3 limitations.
608 In the native Windows build, turn Cygwin names into native names,
609 and also turn slashes into backslashes if the shell requires it (see
610 `w32-shell-dos-semantics').
612 See Info node `(elisp)Standard File Names' for more details."
617 ;; Replace invalid filename characters with !
621 name))
629 "Read directory name, prompting with PROMPT and completing in directory DIR.
630 Value is not expanded---you must call `expand-file-name' yourself.
631 Default name to DEFAULT-DIRNAME if user exits with the same
632 non-empty string that was inserted by this function.
633 (If DEFAULT-DIRNAME is omitted, DIR combined with INITIAL is used,
634 or just DIR if INITIAL is nil.)
635 If the user exits with an empty minibuffer, this function returns
636 an empty string. (This can only happen if the user erased the
637 pre-inserted contents or if `insert-default-directory' is nil.)
638 Fourth arg MUSTMATCH non-nil means require existing directory's name.
639 Non-nil and non-t means also require confirmation after completion.
640 Fifth arg INITIAL specifies text to start with.
641 DIR should be an absolute directory name. It defaults to
642 the value of `default-directory'."
647 dir))
648 mustmatch initial
651 \f
653 "Show the current default directory."
658 "Value of the CDPATH environment variable, as a list.
662 "Explode a search path into a list of directory names.
663 Directories are separated by occurrences of `path-separator'
664 \(which is colon in GNU and GNU-like systems)."
665 ;; We could use split-string here.
673 nil
678 cd-list)))
681 "Change current directory to given absolute file name DIR."
682 ;; Put the name into directory syntax now,
683 ;; because otherwise expand-file-name may give some bad results.
685 ;; We used to additionally call abbreviate-file-name here, for an
686 ;; unknown reason. Problem is that most buffers are setup
687 ;; without going through cd-absolute and don't call
688 ;; abbreviate-file-name on their default-directory, so the few that
689 ;; do end up using a superficially different directory.
701 "Make DIR become the current buffer's default directory.
702 If your environment includes a `CDPATH' variable, try each one of
703 that list of directories (separated by occurrences of
704 `path-separator') when resolving a relative directory name.
705 The path separator is colon in GNU and GNU-like systems."
708 ;; FIXME: There's a subtle bug in the completion below. Seems linked
709 ;; to a fundamental difficulty of implementing `predicate' correctly.
710 ;; The manifestation is that TAB may list non-directories in the case where
711 ;; those files also correspond to valid directories (if your cd-path is (A/
712 ;; B/) and you have A/a a file and B/a a directory, then both `a' and `a/'
713 ;; will be listed as valid completions).
714 ;; This is because `a' (listed because of A/a) is indeed a valid choice
715 ;; (which will lead to the use of B/a).
720 cd-path nil))
729 default-directory default-directory
730 t))))
740 "Load the Lisp file named FILE."
741 ;; This is a case where .elc makes a lot of sense.
748 "Search for FILENAME through PATH.
749 If found, return the absolute file name of FILENAME, with its suffixes;
750 otherwise return nil.
751 PATH should be a list of directories to look in, like the lists in
752 `exec-path' or `load-path'.
753 If SUFFIXES is non-nil, it should be a list of suffixes to append to
756 If non-nil, PREDICATE is used instead of `file-readable-p'.
758 This function will normally skip directories, so if you want it to find
759 directories, make sure the PREDICATE function returns `dir-ok' for them.
761 PREDICATE can also be an integer to pass to the `access' system call,
762 in which case file-name handlers are ignored. This usage is deprecated.
763 For compatibility, PREDICATE can also be one of the symbols
764 `executable', `readable', `writable', or `exists', or a list of
765 one or more of those symbols."
776 "Do completion for file names passed to `locate-file'."
779 ;; FIXME: maybe we should use completion-file-name-table instead,
780 ;; tho at least for `load', the arg is passed through
781 ;; substitute-in-file-name for historical reasons.
791 ;; If we have files like "foo.el" and "foo.elc", we could load one of
792 ;; them with "foo.el", "foo.elc", or "foo", where just "foo" is the
793 ;; preferred way. So if we list all 3, that gives a lot of redundant
794 ;; entries for the poor soul looking just for "foo". OTOH, sometimes
795 ;; the user does want to pay attention to the extension. We try to
796 ;; diffuse this tension by stripping the suffix, except when the
797 ;; result is a single element (i.e. usually we only list "foo" unless
798 ;; it's the only remaining element in the list, in which case we do
799 ;; list "foo", "foo.elc" and "foo.el").
810 string-file dir))
815 ;; Switching from names to names+fullnames creates a non-monotonicity
816 ;; which can cause problems with things like partial-completion.
817 ;; To minimize the problem, filter out completion-regexp-list, so that
818 ;; M-x load-library RET t/x.e TAB finds some files. Also remove elements
819 ;; from `names' which only matched `string' when they still had
820 ;; their suffix.
822 ;; Remove duplicates of the first element, so that we can easily check
823 ;; if `names' really only contains a single element.
826 ;; There's no more than one matching non-suffixed element, so expand
827 ;; the list by adding the suffixed elements as well.
830 string-dir names string-file pred action)))))
833 "Do completion for file names passed to `locate-file'.
834 PATH-AND-SUFFIXES is a pair of lists, (DIRECTORIES . SUFFIXES)."
837 string nil action))
842 "Regexp of directory names which stop the search in `locate-dominating-file'.
843 Any directory whose name matches this regexp will be treated like
844 a kind of root directory by `locate-dominating-file' which will stop its search
845 when it bumps into it.
846 The default regexp prevents fruitless and time-consuming attempts to find
847 special files in directories in which filenames are interpreted as hostnames,
850 ;; (defun locate-dominating-files (file regexp)
851 ;; "Look up the directory hierarchy from FILE for a file matching REGEXP.
852 ;; Stop at the first parent where a matching file is found and return the list
853 ;; of files that that match in this directory."
854 ;; (catch 'found
855 ;; ;; `user' is not initialized yet because `file' may not exist, so we may
856 ;; ;; have to walk up part of the hierarchy before we find the "initial UID".
857 ;; (let ((user nil)
858 ;; ;; Abbreviate, so as to stop when we cross ~/.
859 ;; (dir (abbreviate-file-name (file-name-as-directory file)))
860 ;; files)
861 ;; (while (and dir
862 ;; ;; As a heuristic, we stop looking up the hierarchy of
863 ;; ;; directories as soon as we find a directory belonging to
864 ;; ;; another user. This should save us from looking in
865 ;; ;; things like /net and /afs. This assumes that all the
866 ;; ;; files inside a project belong to the same user.
867 ;; (let ((prev-user user))
868 ;; (setq user (nth 2 (file-attributes dir)))
869 ;; (or (null prev-user) (equal user prev-user))))
870 ;; (if (setq files (condition-case nil
871 ;; (directory-files dir 'full regexp 'nosort)
872 ;; (error nil)))
873 ;; (throw 'found files)
874 ;; (if (equal dir
875 ;; (setq dir (file-name-directory
876 ;; (directory-file-name dir))))
877 ;; (setq dir nil))))
878 ;; nil)))
881 "Look up the directory hierarchy from FILE for a file named NAME.
882 Stop at the first parent directory containing a file NAME,
883 and return the directory. Return nil if not found."
884 ;; We used to use the above locate-dominating-files code, but the
885 ;; directory-files call is very costly, so we're much better off doing
886 ;; multiple calls using the code in here.
887 ;;
888 ;; Represent /home/luser/foo as ~/foo so that we don't try to look for
889 ;; `name' in /home or in /.
892 ;; `user' is not initialized outside the loop because
893 ;; `file' may not exist, so we may have to walk up part of the
894 ;; hierarchy before we find the "initial UID". Note: currently unused
895 ;; (user nil)
896 try)
899 ;; FIXME: Disabled this heuristic because it is sometimes
900 ;; inappropriate.
901 ;; As a heuristic, we stop looking up the hierarchy of
902 ;; directories as soon as we find a directory belonging
903 ;; to another user. This should save us from looking in
904 ;; things like /net and /afs. This assumes that all the
905 ;; files inside a project belong to the same user.
906 ;; (let ((prev-user user))
907 ;; (setq user (nth 2 (file-attributes file)))
908 ;; (and prev-user (not (equal user prev-user))))
915 root))
919 "Search for COMMAND in `exec-path' and return the absolute file name.
920 Return nil if COMMAND is not found anywhere in `exec-path'."
921 ;; Use 1 rather than file-executable-p to better match the behavior of
922 ;; call-process.
926 "Load the Emacs Lisp library named LIBRARY.
927 This is an interface to the function `load'. LIBRARY is searched
928 for in `load-path', both with and without `load-suffixes' (as
929 well as `load-file-rep-suffixes').
931 See Info node `(emacs)Lisp Libraries' for more details.
932 See `load-file' for a different interface to `load'."
936 load-path
941 "Test whether FILE specifies a location on a remote system.
942 A file is considered remote if accessing it is likely to
943 be slower or less reliable than accessing local files.
945 `file-remote-p' never opens a new remote connection. It can
946 only reuse a connection that is already open.
948 Return nil or a string identifying the remote connection
949 \(ideally a prefix of FILE). Return nil if FILE is a relative
950 file name.
952 When IDENTIFICATION is nil, the returned string is a complete
953 remote identifier: with components method, user, and host. The
954 components are those present in FILE, with defaults filled in for
955 any that are missing.
957 IDENTIFICATION can specify which part of the identification to
958 return. IDENTIFICATION can be the symbol `method', `user',
959 `host', or `localname'. Any other value is handled like nil and
960 means to return the complete identification. The string returned
961 for IDENTIFICATION `localname' can differ depending on whether
962 there is an existing connection.
964 If CONNECTED is non-nil, return an identification only if FILE is
965 located on a remote system and a connection is established to
966 that remote system.
968 Tip: You can use this expansion of remote identifier components
969 to derive a new remote file name from an existing one. For
975 same remote identifier as FILE but expanded; a name such as
980 nil)))
983 "Whether to use the remote file-name cache for read access.
985 When `nil', always use the cached values.
986 When `t', never use them.
987 A number means use them for that amount of seconds since they were
988 cached.
990 File attributes of remote files are cached for better performance.
991 If they are changed out of Emacs' control, the cached values
992 become invalid, and must be invalidated.
994 In case a remote file is checked regularly, it might be
995 reasonable to let-bind this variable to a value less then the
996 time period between two checks.
997 Example:
999 (defun display-time-file-nonempty-p (file)
1000 (let ((remote-file-name-inhibit-cache (- display-time-interval 5)))
1001 (and (file-exists-p file)
1002 (< 0 (nth 7 (file-attributes (file-chase-links file)))))))"
1013 "Copy the file FILE into a temporary file on this machine.
1014 Returns the name of the local copy, or nil, if FILE is directly
1015 accessible."
1016 ;; This formerly had an optional BUFFER argument that wasn't used by
1017 ;; anything.
1021 nil)))
1024 "Return the truename of FILENAME.
1025 If FILENAME is not absolute, first expands it against `default-directory'.
1026 The truename of a file name is found by chasing symbolic links
1027 both at the level of the file and at the level of the directories
1028 containing it, until no links are left at any level.
1031 ;; COUNTER and PREV-DIRS are only used in recursive calls.
1032 ;; COUNTER can be a cons cell whose car is the count of how many
1033 ;; more links to chase before getting an error.
1034 ;; PREV-DIRS can be a cons cell whose car is an alist
1035 ;; of truenames we've just recently computed.
1049 ;; For speed, remove the ange-ftp completion handler from the list.
1050 ;; We know it's not needed here.
1051 ;; For even more speed, do this only on the outermost call.
1058 ;; andrewi@harlequin.co.uk - none of the following code (except for
1059 ;; invoking the file-name handler) currently applies on Windows
1060 ;; (ie. there are no native symlinks), but there is an issue with
1061 ;; case differences being ignored by the OS, and short "8.3 DOS"
1062 ;; name aliases existing for all files. (The short names are not
1063 ;; reported by directory-files, but can be used to refer to files.)
1064 ;; It seems appropriate for file-truename to resolve these issues in
1065 ;; the most natural way, which on Windows is to call the function
1066 ;; `w32-long-file-name' - this returns the exact name of a file as
1067 ;; it is stored on disk (expanding short name aliases with the full
1068 ;; name in the process).
1071 ;; For file name that has a special handler, call handler.
1072 ;; This is so that ange-ftp can save time by doing a no-op.
1075 ;; If filename contains a wildcard, newname will be the old name.
1077 ;; If filename exists, use the long name. If it doesn't exist,
1078 ;; drill down until we find a directory that exists, and use
1079 ;; the long name of that, with the extra non-existent path
1080 ;; components concatenated.
1082 missing rest)
1085 ;; Include the preceding directory separator in the missing
1086 ;; part so subsequent recursion on the rest works.
1091 ""
1096 ;; If this file directly leads to a link, process that iteratively
1097 ;; so that we don't use lots of stack.
1103 ;; For file name that has a special handler, call handler.
1104 ;; This is so that ange-ftp can save time by doing a no-op.
1107 done t)
1109 target dirfile)
1110 ;; Get the truename of the directory.
1112 ;; If these are equal, we have the (or a) root directory.
1114 ;; If this is the same dir we last got the truename for,
1115 ;; save time--don't recalculate.
1125 done t)
1128 done t)
1129 ;; Put it back on the file name.
1131 ;; Is the file name the name of a link?
1134 ;; Yes => chase that link, then start all over
1135 ;; since the link may point to a directory name that uses links.
1136 ;; We can't safely use expand-file-name here
1137 ;; since target might look like foo/../bar where foo
1138 ;; is itself a link. Instead, we handle . and .. above.
1141 target
1143 done nil)
1144 ;; No, we are done!
1146 filename))
1149 "Chase links in FILENAME until a name that is not a link.
1150 Unlike `file-truename', this does not check whether a parent
1151 directory name is a symbolic link.
1152 If the optional argument LIMIT is a number,
1153 it means chase no more than that many links and then stop."
1161 ;; In the context of a link, `//' doesn't mean what Emacs thinks.
1164 ;; Handle `..' by hand, since it needs to work in the
1165 ;; target of any directory symlink.
1166 ;; This code is not quite complete; it does not handle
1167 ;; embedded .. in some cases such as ./../foo and foo/bar/../../../lose.
1171 ;; Chase links in the default dir of the symlink.
1175 ;; Now find the parent of that dir.
1179 newname))
1181 ;; A handy function to display file sizes in human-readable form.
1182 ;; See http://en.wikipedia.org/wiki/Kibibyte for the reference.
1184 "Produce a string showing FILE-SIZE in human-readable form.
1186 Optional second argument FLAVOR controls the units and the display format:
1188 If FLAVOR is nil or omitted, each kilobyte is 1024 bytes and the produced
1190 If FLAVOR is `si', each kilobyte is 1000 bytes and the produced suffixes
1192 If FLAVOR is `iec', each kilobyte is 1024 bytes and the produced suffixes
1195 1024.0
1198 ;; none, kilo, mega, giga, tera, peta, exa, zetta, yotta
1204 "%.1f%s%s"
1206 file-size
1208 "K"
1213 "Create a temporary file.
1214 The returned file name (created by appending some random characters at the end
1215 of PREFIX, and expanding against `temporary-file-directory' if necessary),
1216 is guaranteed to point to a newly created empty file.
1217 You can then use `write-region' to write new data into the file.
1219 If DIR-FLAG is non-nil, create a new empty directory instead of a file.
1221 If SUFFIX is non-nil, add that at the end of the file name."
1223 file)
1226 ;; Create temp files with strict access rights. It's easy to
1227 ;; loosen them later, whereas it's impossible to close the
1228 ;; time-window of loose permissions otherwise.
1236 temporary-file-directory)
1238 temporary-file-directory))))
1244 nil)
1246 ;; the file was somehow created by someone else between
1247 ;; `make-temp-name' and `write-region', let's try again.
1248 nil)
1249 file)
1250 ;; Reset the umask.
1254 "Change the encoding of FILE's name from CODING to NEW-CODING.
1255 The value is a new name of FILE.
1256 Signals a `file-already-exists' error if a file of the new name
1257 already exists unless optional fourth argument OK-IF-ALREADY-EXISTS
1258 is non-nil. A number as fourth arg means request confirmation if
1259 the new name already exists. This is what happens in interactive
1260 use with M-x."
1263 default-file-name-coding-system))
1265 from-coding to-coding)
1267 ;; We provide the default coding only when it seems that
1268 ;; the filename is correctly decoded by the default
1269 ;; coding.
1275 filename default-coding)
1276 default-coding))
1280 ;; We provide the default coding only when a user is going to
1281 ;; change the encoding not from the default coding.
1285 filename from-coding)))
1288 filename from-coding default-coding)
1289 default-coding)))
1293 default-file-name-coding-system))
1294 ;; FILE should have been decoded by DEFAULT-CODING.
1298 ;; Suppress further encoding.
1303 newname))
1304 \f
1306 "Whether confirmation is requested before visiting a new file or buffer.
1307 If nil, confirmation is not requested.
1308 If the value is `after-completion', confirmation is only
1309 requested if the user called `minibuffer-complete' right before
1310 `minibuffer-complete-and-exit'.
1311 Any other non-nil value means to request confirmation.
1313 This affects commands like `switch-to-buffer' and `find-file'."
1321 "Whether to request confirmation before visiting a new file or buffer.
1322 The variable `confirm-nonexistent-file-or-buffer' determines the
1323 return value, which may be passed as the REQUIRE-MATCH arg to
1324 `read-buffer' or `find-file-read-args'."
1332 "Temporarily add FUN to `minibuffer-setup-hook' while executing BODY.
1333 BODY should use the minibuffer at most once.
1334 Recursive uses of the minibuffer are unaffected (FUN is not
1335 called additional times).
1337 This macro actually adds an auxiliary function that calls FUN,
1338 rather than FUN itself, to `minibuffer-setup-hook'."
1344 ;; Clear out this hook so it does not interfere
1345 ;; with any recursive minibuffer usage.
1356 t))
1359 "Edit file FILENAME.
1360 Switch to a buffer visiting file FILENAME,
1361 creating one if none already exists.
1362 Interactively, the default if you just type RET is the current directory,
1363 but the visited file name is available through the minibuffer history:
1364 type M-n to pull it into the minibuffer.
1366 You can visit files on remote machines by specifying something
1367 like /ssh:SOME_REMOTE_MACHINE:FILE for the file name. You can
1368 also visit local files as a different user by specifying
1369 /sudo::FILE for the file name.
1370 See the Info node `(tramp)Filename Syntax' in the Tramp Info
1371 manual, for more about this.
1373 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1374 expand wildcards (if any) and visit multiple files. You can
1375 suppress wildcard expansion by setting `find-file-wildcards' to nil.
1377 To visit a file without any kind of conversion and without
1388 "Edit file FILENAME, in another window.
1391 an existing one. See the function `display-buffer'.
1393 Interactively, the default if you just type RET is the current directory,
1394 but the visited file name is available through the minibuffer history:
1395 type M-n to pull it into the minibuffer.
1397 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1398 expand wildcards (if any) and visit multiple files."
1411 "Edit file FILENAME, in another frame.
1414 an existing one. See the function `display-buffer'.
1416 Interactively, the default if you just type RET is the current directory,
1417 but the visited file name is available through the minibuffer history:
1418 type M-n to pull it into the minibuffer.
1420 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1421 expand wildcards (if any) and visit multiple files."
1434 "Edit the existing file FILENAME.
1436 file names with wildcards."
1445 "Edit file FILENAME but don't allow changes.
1459 value))
1462 "Edit file FILENAME in another window but don't allow changes.
1476 value))
1479 "Edit file FILENAME in another frame but don't allow changes.
1493 value))
1496 "Find file FILENAME as a replacement for the file in the next window.
1497 This command does not select that window.
1501 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1502 expand wildcards (if any) and replace the file with multiple files."
1513 "Find alternate file: " file-dir nil
1515 t))))
1525 "Find file FILENAME, select its buffer, kill previous buffer.
1526 If the current buffer now contains an empty file that you just visited
1527 \(presumably by mistake), use this command to visit the file you really want.
1531 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1532 expand wildcards (if any) and replace the file with multiple files.
1534 If the current buffer is an indirect buffer, or the base buffer
1535 for one or more indirect buffers, the other buffer(s) are not
1536 killed."
1545 "Find alternate file: " file-dir nil
1547 t)))
1562 ;; Run `kill-buffer-hook' here. It needs to happen before
1563 ;; variables like `buffer-file-name' etc are set to nil below,
1564 ;; because some of the hooks that could be invoked
1565 ;; (e.g., `save-place-to-alist') depend on those variables.
1566 ;;
1567 ;; Note that `kill-buffer-hook' is not what queries whether to
1568 ;; save a modified buffer visiting a file. Rather, `kill-buffer'
1569 ;; asks that itself. Thus, there's no need to temporarily do
1570 ;; `(set-buffer-modified-p nil)' before running this hook.
1572 ;; Okay, now we can end-of-life the old buffer.
1579 ;; This prevents us from finding the same buffer
1580 ;; if we specified the same file again.
1584 ;; Likewise for dired buffers.
1588 ;; This executes if find-file gets an error
1589 ;; and does not really find anything.
1590 ;; We put things back as they were.
1591 ;; If find-file actually finds something, we kill obuf below.
1600 ;; We already ran these; don't run them again.
1603 \f
1605 "Create a suitably named buffer for visiting FILENAME, and return it.
1606 FILENAME (sans directory) is used unchanged if that name is free;
1607 otherwise a string <2> or <3> or ... is appended to get an unused name.
1608 Spaces at the start of FILENAME (sans directory) are removed."
1617 "Create and return a buffer with a name based on NAME.
1618 Choose the buffer's name using `generate-new-buffer-name'."
1622 "Regexp to match the automounter prefix in a directory name."
1630 "Return a version of FILENAME shortened using `directory-abbrev-alist'.
1632 home directory is a root directory) and removes automounter prefixes
1633 \(see the variable `automount-dir-prefix')."
1634 ;; Get rid of the prefixes added by the automounter.
1641 ;; Avoid treating /home/foo as /home/Foo during `~' substitution.
1642 ;; To fix this right, we need a `file-name-case-sensitive-p'
1643 ;; function, but we don't have that yet, so just guess.
1646 ;; If any elt of directory-abbrev-alist matches this name,
1647 ;; abbreviate accordingly.
1653 ;; Compute and save the abbreviated homedir name.
1654 ;; We defer computing this until the first time it's needed, to
1655 ;; give time for directory-abbrev-alist to be set properly.
1656 ;; We include a slash at the end, to avoid spurious matches
1657 ;; such as `/usr/foobar' when the home dir is `/usr/foo'.
1664 ;; If FILENAME starts with the abbreviated homedir,
1665 ;; make it start with `~' instead.
1667 ;; If the home dir is just /, don't change it.
1670 ;; MS-DOS root directories can come with a drive letter;
1671 ;; Novell Netware allows drive letters beyond `Z:'.
1679 filename)))
1682 "Return the buffer visiting file FILENAME (a string).
1683 This is like `get-file-buffer', except that it checks for any buffer
1684 visiting the same file, possibly under a different name.
1685 If PREDICATE is non-nil, only buffers satisfying it are eligible,
1686 and others are ignored.
1687 If there is no such live buffer, return nil."
1700 found)
1710 ;; Verify this buffer's file number
1711 ;; still belongs to its file.
1714 attributes)
1718 found))))
1719 \f
1721 "Non-nil means file-visiting commands should handle wildcards.
1722 For example, if you specify `*.c', that would visit all the files
1723 whose names match the pattern."
1729 "Non-nil means suppress warning messages for symlinked files.
1730 When nil, Emacs prints a warning when visiting a file that is already
1731 visited, but with a different name. Setting this option to t
1732 suppresses this warning."
1738 "Maximum size of file above which a confirmation is requested.
1739 When nil, never request confirmation."
1746 "If file SIZE larger than `large-file-warning-threshold', allow user to abort.
1747 OP-TYPE specifies the file operation being performed (for message to user)."
1756 "Read file FILENAME into a buffer and return the buffer.
1757 If a buffer exists visiting FILENAME, return that one, but
1758 verify that the file has not changed since visited or saved.
1759 The buffer is not selected, just returned to the caller.
1760 Optional second arg NOWARN non-nil means suppress any warning messages.
1761 Optional third arg RAWFILE non-nil means the file is read literally.
1762 Optional fourth arg WILDCARDS non-nil means do wildcard processing
1763 and visit all the matching files. When wildcards are actually
1764 used and expanded, return a list of buffers that are visiting
1765 the various files."
1772 'find-directory-functions
1775 filename)))
1778 find-file-wildcards
1792 ;; Find any buffer for a file which has same truename.
1794 ;; Let user know if there is a buffer with the same truename.
1798 find-file-suppress-same-file-warnings
1802 ;; Optionally also find that buffer.
1805 ;; Check to see if the file looks uncommonly large.
1809 ;; We are using an existing buffer.
1816 ;; Certain files should be reverted automatically
1817 ;; if they have changed on disk and not in the buffer.
1825 found))
1835 "File %s changed on disk. Discard your edits? "
1840 "File %s changed on disk. Discard your edits in %s? "
1848 ;; Check if a formerly read-only file has become
1849 ;; writable and vice versa, but if the buffer agrees
1850 ;; with the new state of the file, that is ok too.
1858 buffer-file-name
1867 ;; It is confusing to ask whether to visit
1868 ;; non-literally if they have the file in
1869 ;; hexl-mode or image-mode.
1875 "The file %s is already visited normally,
1876 and you have edited the buffer. Now you have asked to visit it literally,
1877 meaning no coding system handling, format conversion, or local variables.
1878 Emacs can only visit a file in one way at a time.
1880 Do you want to save the file, and visit it literally instead? "
1881 "The file %s is already visited literally,
1882 meaning no coding system handling, format conversion, or local variables.
1883 You have edited the buffer. Now you have asked to visit the file normally,
1884 but Emacs can only visit a file in one way at a time.
1891 rawfile truename number))
1895 "\
1896 Do you want to discard your changes, and visit the file literally now? "
1897 "\
1900 rawfile truename number)
1906 "The file %s is already visited normally.
1907 You have asked to visit it literally,
1908 meaning no coding system decoding, format conversion, or local variables.
1909 But Emacs can only visit a file in one way at a time.
1911 Do you want to revisit the file literally now? "
1912 "The file %s is already visited literally,
1913 meaning no coding system decoding, format conversion, or local variables.
1914 You have asked to visit it normally,
1915 but Emacs can only visit a file in one way at a time.
1920 rawfile truename number)
1923 ;; Return the buffer we are using.
1924 buf)
1925 ;; Create a new buffer.
1927 ;; find-file-noselect-1 may use a different buffer.
1929 rawfile truename number))))))
1935 ;; Needed in case we are re-visiting the file with a different
1936 ;; text representation.
1953 filename)))
1954 ;; Unconditionally set error
1964 filename)))
1965 ;; Run find-file-not-found-functions until one returns non-nil.
1967 ;; If they fail too, set error.
1969 ;; Record the file's truename, and maybe use that as visited name.
1977 ;; Set buffer's default directory to that of the file.
1979 ;; Turn off backup files for certain file names. Since
1980 ;; this is a permanent local, the major mode won't eliminate it.
1995 \f
1997 "Like `insert-file-contents', but only reads in the file literally.
1998 A buffer may be modified in several ways after reading into the buffer,
1999 to Emacs features such as format decoding, character code
2000 conversion, `find-file-hook', automatic uncompression, etc.
2002 This function ensures that none of these modifications will take place."
2010 nil))
2013 inhibit-file-name-handlers))
2026 filename)))
2027 ;; Check whether the file is uncommonly large
2038 "Insert contents of file FILENAME into buffer after point with no conversion.
2040 This function is meant for the user to run interactively.
2041 Don't call it from programs! Use `insert-file-contents-literally' instead.
2042 \(Its calling sequence is different; see its documentation)."
2047 "Non-nil if this buffer was made by `find-file-literally' or equivalent.
2048 This has the `permanent-local' property, which takes effect if you
2053 "Visit file FILENAME with no conversion of any kind.
2054 Format conversion and character code conversion are both disabled,
2055 and multibyte characters are disabled in the resulting buffer.
2056 The major mode used is Fundamental mode regardless of the file name,
2057 and local variable specifications in the file are ignored.
2058 Automatic uncompression and adding a newline at the end of the
2059 file due to `require-final-newline' is also disabled.
2061 You cannot absolutely rely on this function to result in
2062 visiting the file literally. If Emacs already has a buffer
2063 which is visiting the file, you get the existing buffer,
2064 regardless of whether it was created literally or not.
2066 In a Lisp program, if you want to be sure of accessing a file's
2067 contents literally, you should create a temporary buffer and then read
2068 the file contents into it using `insert-file-contents-literally'."
2071 "Find file literally: " nil default-directory
2074 \f
2076 _after-find-file-from-revert-buffer
2077 nomodes)
2078 "Called after finding a file and by the default revert function.
2079 Sets buffer mode, parses local variables.
2080 Optional args ERROR, WARN, and NOAUTO: ERROR non-nil means there was an
2081 error in reading the file. WARN non-nil means warn if there
2082 exists an auto-save file more recent than the visited file.
2083 NOAUTO means don't mess with auto-save mode.
2084 Fourth arg AFTER-FIND-FILE-FROM-REVERT-BUFFER is ignored
2085 \(see `revert-buffer-in-progress-p' for similar functionality).
2086 Fifth arg NOMODES non-nil means don't alter the file's modes.
2087 Finishes by calling the functions in `find-file-hook'
2088 unless NOMODES is non-nil."
2091 nil
2101 "Symbolic link that points to nonexistent file"
2105 ;; No need to warn if buffer is auto-saved
2106 ;; under the name of the visited file.
2108 auto-save-visited-file-name))
2111 buffer-file-name))
2131 ;; Make people do a little extra work (C-x C-q)
2132 ;; before altering a backup file.
2135 ;; When a file is marked read-only,
2136 ;; make the buffer read-only even if root is looking at it.
2144 ;; If requested, add a newline at the end of the file.
2154 view-read-only
2160 "Eval BODY and turn any error into a FORMAT message.
2161 FORMAT can have a %s escape which will be replaced with the actual error.
2162 If `debug-on-error' is set, errors are not caught, so that you can
2163 debug them.
2164 Avoid using a large BODY since it is duplicated."
2173 "Choose the major mode for this buffer automatically.
2174 Also sets up any specified local variables of the file.
2175 Uses the visited file name, the -*- line, and the local variables spec.
2177 This function is called automatically from `find-file'. In that case,
2178 we may set up the file-specified mode and local variables,
2179 depending on the value of `enable-local-variables'.
2180 In addition, if `local-enable-local-variables' is nil, we do
2181 not set local variables (though we do notice a mode specified with -*-.)
2183 `enable-local-variables' is ignored if you run `normal-mode' interactively,
2184 or from Lisp without specifying the optional argument FIND-FILE;
2185 in that case, this function acts as if `enable-local-variables' were t."
2189 ;; FIXME this is less efficient than it could be, since both
2190 ;; s-a-m and h-l-v may parse the same regions, looking for "mode:".
2195 ;; Turn font lock off and on, to make sure it takes account of
2196 ;; whatever file local variables are relevant to it.
2198 ;; Font-lock-mode (now in font-core.el) can be ON when
2199 ;; font-lock.el still hasn't been loaded.
2209 "Non-nil means to try second pass through `auto-mode-alist'.
2210 This means that if the first case-sensitive search through the alist fails
2211 to find a matching major mode, a second case-insensitive search is made.
2212 On systems with case-insensitive file names, this variable is ignored,
2213 since only a single case-insensitive search through the alist is made."
2219 ;; Note: The entries for the modes defined in cc-mode.el (c-mode,
2220 ;; c++-mode, java-mode and more) are added through autoload
2221 ;; directives in that file. That way is discouraged since it
2222 ;; spreads out the definition of the initial value.
2266 ;; Less common extensions come here
2267 ;; so more common ones above are found faster.
2275 ;; Besides .gdbinit, gdb documents other names to be usable for init
2276 ;; files, cross-debuggers can use something like
2277 ;; .PROCESSORNAME-gdbinit so that the host and target gdbinit files
2278 ;; don't interfere with each other.
2310 ;; The Fortran standard does not say anything about file extensions.
2311 ;; .f90 was widely used for F90, now we seem to be trapped into
2312 ;; using a different extension for each language revision.
2313 ;; Anyway, the following extensions are supported by gfortran.
2321 ;; The list of archive file extensions should be in sync with
2322 ;; `auto-coding-alist' with `no-conversion' coding system.
2328 ;; Mailer puts message to be edited in
2329 ;; /tmp/Re.... or Message
2332 ;; some news reader is reported to use this
2343 ;; .emacs or .gnus or .viper following a directory delimiter in
2344 ;; Unix, MSDOG or VMS syntax.
2347 ;; _emacs following a directory delimiter
2348 ;; in MsDos syntax
2352 ;; Linux-2.6.9 uses some different suffix for linker scripts:
2353 ;; "ld", "lds", "lds.S", "lds.in", "ld.script", and "ld.script.balo".
2354 ;; eCos uses "ld" and "ldi". Netbsd uses "ldscript.*".
2357 ;; .xs is also used for ld scripts, but seems to be more commonly
2358 ;; associated with Perl .xs files (C with Perl bindings). (Bug#7071)
2360 ;; Explained in binutils ld/genscripts.sh. Eg:
2361 ;; A .x script file is the default script.
2362 ;; A .xr script is for linking without relocation (-r flag). Etc.
2366 ;; Common Lisp ASDF package system.
2373 ("\\.\\(?:PDF\\|DVI\\|OD[FGPST]\\|DOCX?\\|XLSX?\\|PPTX?\\|pdf\\|dvi\\|od[fgpst]\\|docx?\\|xlsx?\\|pptx?\\)\\'" . doc-view-mode-maybe)
2385 ;; Windows candidates may be opened case sensitively on Unix
2391 ("\\`/etc/\\(?:DIR_COLORS\\|ethers\\|.?fstab\\|.*hosts\\|lesskey\\|login\\.?de\\(?:fs\\|vperm\\)\\|magic\\|mtab\\|pam\\.d/.*\\|permissions\\(?:\\.d/.+\\)?\\|protocols\\|rpc\\|services\\)\\'" . conf-space-mode)
2392 ("\\`/etc/\\(?:acpid?/.+\\|aliases\\(?:\\.d/.+\\)?\\|default/.+\\|group-?\\|hosts\\..+\\|inittab\\|ksysguarddrc\\|opera6rc\\|passwd-?\\|shadow-?\\|sysconfig/.+\\)\\'" . conf-mode)
2393 ;; ChangeLog.old etc. Other change-log-mode entries are above;
2394 ;; this has lower priority to avoid matching changelog.sgml etc.
2396 ;; either user's dot-files or under /etc or some such
2398 ;; alas not all ~/.*rc files are like this
2399 ("/\\.\\(?:enigma\\|gltron\\|gtk\\|hxplayer\\|net\\|neverball\\|qt/.+\\|realplayer\\|scummvm\\|sversion\\|sylpheed/.+\\|xmp\\)rc\\'" . conf-mode)
2404 ;; this contains everything twice, with space and with colon :-(
2406 ;; Get rid of any trailing .n.m and try again.
2407 ;; This is for files saved by cvs-merge that look like .#<file>.<rev>
2408 ;; or .#<file>.<rev>-<rev> or VC's <file>.~<rev>~.
2409 ;; Using mode nil rather than `ignore' would let the search continue
2410 ;; through this list (with the shortened name) rather than start over.
2413 ;; This should come after "in" stripping (e.g. config.h.in).
2414 ;; *.cf, *.cfg, *.conf, *.config[.local|.de_DE.UTF8|...], */config
2416 ;; The following should come after the ChangeLog pattern
2417 ;; for the sake of ChangeLog.1, etc.
2418 ;; and after the .scm.[0-9] and CVS' <file>.<rev> patterns too.
2420 "Alist of filename patterns vs corresponding major mode functions.
2421 Each element looks like (REGEXP . FUNCTION) or (REGEXP FUNCTION NON-NIL).
2422 \(NON-NIL stands for anything that is not nil; the value does not matter.)
2423 Visiting a file whose name matches REGEXP specifies FUNCTION as the
2424 mode function to use. FUNCTION will be called, unless it is nil.
2426 If the element has the form (REGEXP FUNCTION NON-NIL), then after
2427 calling FUNCTION (if it's not nil), we delete the suffix that matched
2428 REGEXP and search the list again for another match.
2430 The extensions whose FUNCTION is `archive-mode' should also
2431 appear in `auto-coding-alist' with `no-conversion' coding system.
2433 See also `interpreter-mode-alist', which detects executable script modes
2434 based on the interpreters they specify to run,
2439 "Select Conf mode or XML mode according to start of file."
2449 ;; Note: The entries for the modes defined in cc-mode.el (awk-mode
2450 ;; and pike-mode) are added through autoload directives in that
2451 ;; file. That way is discouraged since it spreads out the
2452 ;; definition of the initial value.
2492 "Alist mapping interpreter names to major modes.
2493 This is used for files whose first lines match `auto-mode-interpreter-regexp'.
2494 Each element looks like (INTERPRETER . MODE).
2495 If INTERPRETER matches the name of the interpreter specified in the first line
2496 of a script, mode MODE is enabled.
2503 ;; TODO really this should be a list of modes (eg tar-mode), not regexps,
2504 ;; because we are duplicating info from auto-mode-alist.
2505 ;; TODO many elements of this list are also in auto-coding-alist.
2513 "List of regexps matching file names in which to ignore local variables.
2515 Files matching this list are typically binary file formats.
2516 They may happen to contain sequences that look like local variable
2517 specifications, but are not really, or they may be containers for
2518 member files with their own local variable sections, which are
2519 not appropriate for the containing file.
2526 "List of regexps matching suffixes to remove from file names.
2527 When checking `inhibit-local-variables-regexps', we first discard
2530 ;; TODO explicitly add case-fold-search t?
2532 "Return non-nil if file local variables should be ignored.
2533 This checks the file (or buffer) name against `inhibit-local-variables-regexps'
2534 and `inhibit-local-variables-suffixes'."
2542 sufs)
2547 temp))
2552 "Regexp matching interpreters, for file mode determination.
2553 This regular expression is matched against the first line of a file
2554 to determine the file's mode in `set-auto-mode'. If it matches, the file
2555 is assumed to be interpreted by the interpreter matched by the second group
2556 of the regular expression. The mode is then determined as the mode
2560 "Alist of buffer beginnings vs. corresponding major mode functions.
2561 Each element looks like (REGEXP . FUNCTION) or (MATCH-FUNCTION . FUNCTION).
2562 After visiting a file, if REGEXP matches the text at the beginning of the
2563 buffer, or calling MATCH-FUNCTION returns non-nil, `normal-mode' will
2564 call FUNCTION rather than allowing `auto-mode-alist' to decide the buffer's
2565 major mode.
2567 If FUNCTION is nil, then it is not called. (That is a way of saying
2575 ;; The < comes before the groups (but the first) to reduce backtracking.
2576 ;; TODO: UTF-16 <?xml may be preceded by a BOM 0xff 0xfe or 0xfe 0xff.
2577 ;; We use [ \t\r\n] instead of `\\s ' to make regex overflow less likely.
2581 comment-re "*"
2584 . html-mode)
2586 ;; These two must come after html, because they are more general:
2591 . sgml-mode)
2594 "Like `magic-mode-alist' but has lower priority than `auto-mode-alist'.
2595 Each element looks like (REGEXP . FUNCTION) or (MATCH-FUNCTION . FUNCTION).
2596 After visiting a file, if REGEXP matches the text at the beginning of the
2597 buffer, or calling MATCH-FUNCTION returns non-nil, `normal-mode' will
2598 call FUNCTION, provided that `magic-mode-alist' and `auto-mode-alist'
2599 have not specified a mode for this file.
2605 "Upper limit on `magic-mode-alist' regexp matches.
2609 "Select major mode appropriate for current buffer.
2611 To find the right major mode, this function checks for a -*- mode tag
2612 checks for a `mode:' entry in the Local Variables section of the file,
2613 checks if it uses an interpreter listed in `interpreter-mode-alist',
2614 matches the buffer beginning against `magic-mode-alist',
2615 compares the filename against the entries in `auto-mode-alist',
2616 then matches the buffer beginning against `magic-fallback-mode-alist'.
2618 If `enable-local-variables' is nil, or if the file name matches
2619 `inhibit-local-variables-regexps', this function does not check
2620 for any mode: tag anywhere in the file. If `local-enable-local-variables'
2621 is nil, then the only mode: tag that can be relevant is a -*- one.
2623 If the optional argument KEEP-MODE-IF-SAME is non-nil, then we
2624 set the major mode only if that would change it. In other words
2625 we don't actually set it to the same mode the buffer already has."
2626 ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*-
2628 end done mode modes)
2629 ;; Once we drop the deprecated feature where mode: is also allowed to
2630 ;; specify minor-modes (ie, there can be more than one "mode:"), we can
2631 ;; remove this section and just let (hack-local-variables t) handle it.
2632 ;; Find a -*- mode tag.
2636 ;; Note by design local-enable-local-variables does not matter here.
2638 try-locals
2641 ;; Find all specifications for the `mode:' variable
2642 ;; and execute them left to right.
2654 modes)))
2655 ;; Simple -*-MODE-*- case.
2658 modes))))
2659 ;; If we found modes to use, invoke them now, outside the save-excursion.
2667 ;; continuing would call minor modes again, toggling them off
2669 ;; hack-local-variables checks local-enable-local-variables etc, but
2670 ;; we might as well be explicit here for the sake of clarity.
2672 enable-local-variables
2673 local-enable-local-variables
2674 try-locals
2681 ;; If we didn't, look for an interpreter specified in the first line.
2682 ;; As a special case, allow for things like "#!/bin/env perl", which
2683 ;; finds the interpreter anywhere in $PATH.
2690 ;; Map interpreter name to a mode, signaling we're done at the
2691 ;; same time.
2693 interpreter-mode-alist))
2694 ;; If we found an interpreter mode to use, invoke it now.
2697 ;; Next try matching the buffer beginning against magic-mode-alist.
2711 ;; Next compare the filename against the entries in auto-mode-alist.
2716 ;; Remove backup-suffixes from file name.
2718 ;; Remove remote file name identification.
2723 ;; Find first matching alist entry.
2726 ;; System is case-insensitive.
2730 ;; System is case-sensitive.
2732 ;; First match case-sensitively.
2736 ;; Fallback to case-insensitive match.
2750 ;; Next try matching the buffer beginning against magic-fallback-mode-alist.
2765 ;; When `keep-mode-if-same' is set, we are working on behalf of
2766 ;; set-visited-file-name. In that case, if the major mode specified is the
2767 ;; same one we already have, don't actually reset it. We don't want to lose
2768 ;; minor modes such as Font Lock.
2770 "Apply MODE and return it.
2771 If optional arg KEEP-MODE-IF-SAME is non-nil, MODE is chased of
2772 any aliases and compared to current major mode. If they are the
2773 same, do nothing and return nil."
2779 mode)))
2782 "Find the -*- spec in the buffer.
2783 Call with point at the place to start searching from.
2784 If one is found, set point to the beginning and return the position
2785 of the end. Otherwise, return nil; may change point.
2786 The variable `inhibit-local-variables-regexps' can cause a -*- spec to
2787 be ignored; but `enable-local-variables' and `local-enable-local-variables'
2788 have no effect."
2791 ;; Don't look for -*- if this file name matches any
2792 ;; of the regexps in inhibit-local-variables-regexps.
2795 ;; If the file begins with "#!" (exec
2796 ;; interpreter magic), look for mode frobs
2797 ;; in the first two lines. You cannot
2798 ;; necessarily put them in the first line
2799 ;; of such a file without screwing up the
2800 ;; interpreter invocation. The same holds
2801 ;; for '\" in man pages (preprocessor
2802 ;; magic for the `man' program).
2813 end))))
2814 \f
2815 ;;; Handling file local variables
2819 file-local-variables-alist dir-local-variables-alist)
2824 "Normal hook run after processing a file's local variables specs.
2825 Major modes can use this to examine user-specified local variables
2829 "List variable-value pairs that are considered safe.
2830 Each element is a cons cell (VAR . VAL), where VAR is a variable
2831 symbol and VAL is a value that is considered safe."
2832 :risky t
2837 ;; This should be here at least as long as Emacs supports write-file-hooks.
2841 "Expressions that are considered safe in an `eval:' local variable.
2842 Add expressions to this list if you want Emacs to evaluate them, when
2843 they appear in an `eval' local variable specification, without first
2844 asking you for confirmation."
2845 :risky t
2850 ;; Risky local variables:
2853 buffer-auto-save-file-name
2854 buffer-file-name
2855 buffer-file-truename
2856 buffer-undo-list
2857 debugger
2858 default-text-properties
2859 eval
2860 exec-directory
2861 exec-path
2862 file-name-handler-alist
2863 frame-title-format
2864 global-mode-string
2865 header-line-format
2866 icon-title-format
2867 inhibit-quit
2868 load-path
2869 max-lisp-eval-depth
2870 max-specpdl-size
2871 minor-mode-map-alist
2872 minor-mode-overriding-map-alist
2873 mode-line-format
2874 mode-name
2875 overriding-local-map
2876 overriding-terminal-local-map
2877 process-environment
2878 standard-input
2879 standard-output
2880 unread-command-events))
2882 ;; Safe local variables:
2883 ;;
2884 ;; For variables defined by major modes, the safety declarations can go into
2885 ;; the major mode's file, since that will be loaded before file variables are
2886 ;; processed.
2887 ;;
2888 ;; For variables defined by minor modes, put the safety declarations in the
2889 ;; file defining the minor mode after the defcustom/defvar using an autoload
2890 ;; cookie, e.g.:
2891 ;;
2892 ;; ;;;###autoload(put 'variable 'safe-local-variable 'stringp)
2893 ;;
2894 ;; Otherwise, when Emacs visits a file specifying that local variable, the
2895 ;; minor mode file may not be loaded yet.
2896 ;;
2897 ;; For variables defined in the C source code the declaration should go here:
2919 "Alist of file-local variable settings in the current buffer.
2920 Each element in this list has the form (VAR . VALUE), where VAR
2921 is a file-local variable (a symbol) and VALUE is the value
2922 specified. The actual value in the buffer may differ from VALUE,
2928 "Alist of directory-local variable settings in the current buffer.
2929 Each element in this list has the form (VAR . VALUE), where VAR
2930 is a directory-local variable (a symbol) and VALUE is the value
2931 specified in .dir-locals.el. The actual value in the buffer
2932 may differ from VALUE, if it is changed by the major or minor modes,
2937 "Normal hook run before setting file-local variables.
2938 It is called after checking for unsafe/risky variables and
2939 setting `file-local-variables-alist', and before applying the
2940 variables stored in `file-local-variables-alist'. A hook
2941 function is allowed to change the contents of this alist.
2943 This hook is called only if there is at least one file-local
2947 "Get confirmation before setting up local variable values.
2948 ALL-VARS is the list of all variables to be set up.
2949 UNSAFE-VARS is the list of those that aren't marked as safe or risky.
2950 RISKY-VARS is the list of those that are marked as risky.
2951 If these settings come from directory-local variables, then
2952 DIR-NAME is the name of the associated directory. Otherwise it is nil."
2954 nil
2961 unsafe-vars))
2965 prompt char)
2973 ", and variables that are risky (**)."
2981 y -- to apply the local variables list.
2985 ! -- to apply the local variables list, and permanently mark these
2997 ;; Make strings with embedded whitespace easier to read.
3005 ""
3022 "Return local variables specified in the -*- line.
3023 Returns an alist of elements (VAR . VAL), where VAR is a variable
3024 and VAL is the specified value. Ignores any specification for
3025 `mode:' and `coding:' (which should have already been handled
3026 by `set-auto-mode' and `set-auto-coding', respectively).
3027 Return nil if the -*- line is malformed.
3029 If MODE-ONLY is non-nil, just returns the symbol specifying the
3030 mode, if there is one, otherwise nil."
3035 result)
3037 nil)
3039 ;; Simple form: "-*- MODENAME -*-".
3043 ;; Hairy form: '-*-' [ <variable> ':' <value> ';' ]* '-*-'
3044 ;; (last ";" is optional).
3045 ;; If MODE-ONLY, just check for `mode'.
3046 ;; Otherwise, parse the -*- line into the RESULT alist.
3054 ;; There used to be a downcase here,
3055 ;; but the manual didn't say so,
3056 ;; and people want to set var names that aren't all lc.
3062 ;; It is traditional to ignore
3063 ;; case when checking for `mode' in set-auto-mode,
3064 ;; so we must do that here as well.
3065 ;; That is inconsistent, but we're stuck with it.
3066 ;; The same can be said for `coding' in set-auto-coding.
3076 ;; Downcase "Mode:".
3082 result))))))
3085 "Filter local variable settings, querying the user if necessary.
3086 VARIABLES is the alist of variable-value settings. This alist is
3087 filtered based on the values of `ignored-local-variables',
3088 `enable-local-eval', `enable-local-variables', and (if necessary)
3089 user interaction. The results are added to
3090 `file-local-variables-alist', without applying them.
3091 If these settings come from directory-local variables, then
3092 DIR-NAME is the name of the associated directory. Otherwise it is nil."
3093 ;; Find those variables that we may want to save to
3094 ;; `safe-local-variable-values'.
3100 ;; Ignore any variable in `ignored-local-variables'.
3101 nil)
3102 ;; Obey `enable-local-eval'.
3110 ;; Ignore duplicates (except `mode') in the present list.
3112 ;; Accept known-safe variables.
3116 ;; The variable is either risky or unsafe:
3123 ;; Query, unless all vars are safe or user wants no querying.
3129 risky-vars dir-name))
3140 "Parse and put into effect this buffer's local variables spec.
3141 Uses `hack-local-variables-apply' to apply the variables.
3144 is specified, and return the corresponding mode symbol, or nil.
3145 In this case, we try to ignore minor-modes, and only return a
3146 major-mode.
3148 If `enable-local-variables' or `local-enable-local-variables' is nil,
3149 this function does nothing. If `inhibit-local-variables-regexps'
3150 applies to the file in question, the file is not scanned for
3151 local variables, but directory-local variables may still be applied."
3152 ;; We don't let inhibit-local-variables-p influence the value of
3153 ;; enable-local-variables, because then it would affect dir-local
3154 ;; variables. We don't want to search eg tar files for file local
3155 ;; variable sections, but there is no reason dir-locals cannot apply
3156 ;; to them. The real meaning of inhibit-local-variables-p is "do
3157 ;; not scan this file for local variables".
3160 result)
3164 ;; Note this is a no-op if enable-local-variables is nil.
3166 ;; This entire function is basically a no-op if enable-local-variables
3167 ;; is nil. All it does is set file-local-variables-alist to nil.
3169 ;; This part used to ignore enable-local-variables when mode-only
3170 ;; was non-nil. That was inappropriate, eg consider the
3171 ;; (artificial) example of:
3172 ;; (setq local-enable-local-variables nil)
3173 ;; Open a file foo.txt that contains "mode: sh".
3174 ;; It correctly opens in text-mode.
3175 ;; M-x set-visited-file name foo.c, and it incorrectly stays in text-mode.
3177 ;; If MODE-ONLY is non-nil, and the prop line specifies a
3178 ;; mode, then we're done, and have no need to scan further.
3180 mode-only))
3181 ;; Look for "Local variables:" line in last page.
3189 ;; suffix is what comes after "local variables:" in its line.
3190 ;; prefix is what comes before "local variables:" in its line.
3200 beg)
3204 endpos
3210 nil t))
3211 ;; This used to be an error, but really all it means is
3212 ;; that this may simply not be a local-variables section,
3213 ;; so just ignore it.
3223 ;; Discard the prefix.
3228 ;; Discard the suffix.
3238 ;; Find the variable name; strip whitespace.
3247 val val2)
3250 ;; Read the variable value.
3257 ;; Specifying minor-modes via mode: is
3258 ;; deprecated, but try to reject them anyway.
3266 'eval
3271 ;; Now we've read all the local variables.
3272 ;; If MODE-ONLY is non-nil, return whether the mode was specified.
3274 ;; Otherwise, set the variables.
3279 "Apply the elements of `file-local-variables-alist'.
3280 If there are any elements, runs `before-hack-local-variables-hook',
3281 then calls `hack-one-local-variable' to apply the alist elements one by one.
3282 Finishes by running `hack-local-variables-hook', regardless of whether
3283 the alist is empty or not.
3285 Note that this function ignores a `mode' entry if it specifies the same
3286 major mode as the buffer already has."
3288 ;; Any 'evals must run in the Right sequence.
3297 "Non-nil if SYM is safe as a file-local variable with value VAL.
3298 It is safe if any of these conditions are met:
3300 * There is a matching entry (SYM . VAL) in the
3301 `safe-local-variable-values' user option.
3303 * The `safe-local-variable' property of SYM is a function that
3304 evaluates to a non-nil value with VAL as an argument."
3308 ;; If the function signals an error, that means it
3309 ;; can't assure us that the value is safe.
3313 "Non-nil if SYM could be dangerous as a file-local variable.
3314 It is dangerous if either of these conditions are met:
3316 * Its `risky-local-variable' property is non-nil.
3322 ;; If this is an alias, check the base name.
3342 "Return t if it is safe to eval EXP when it is found in a file."
3344 ;; Detect certain `put' expressions.
3351 lisp-indent-function
3352 scheme-indent-function))
3353 ;; Only allow safe values (not functions).
3358 ;; Only allow indirect form specs.
3359 ;; During bootstrapping, edebug-basic-spec might not be
3360 ;; defined yet.
3364 ;; Allow expressions that the user requested.
3366 ;; Certain functions can be allowed with safe arguments
3367 ;; or can specify verification functions to try.
3369 ;; Allow (minor)-modes calls with no arguments.
3370 ;; This obsoletes the use of "mode:" for such things. (Bug#8613)
3379 ok))
3387 ok))))))))
3390 "Set local variable VAR with value VAL.
3391 If VAR is `mode', call `VAL-mode' as a function unless it's
3392 already the major mode."
3399 ;; A minor mode must be passed an argument.
3400 ;; Otherwise, if the user enables the minor mode in a
3401 ;; major mode hook, this would toggle it off.
3407 ;; Make sure the string has no text properties.
3408 ;; Some text properties can get evaluated in various ways,
3409 ;; so it is risky to put them on with a local variable list.
3413 \f
3414 ;;; Handling directory-local variables, aka project settings.
3420 "List of cached directory roots for directory-local variable classes.
3421 Each element in this list has the form (DIR CLASS MTIME).
3422 DIR is the name of the directory.
3423 CLASS is the name of a variable class (a symbol).
3424 MTIME is the recorded modification time of the directory-local
3425 variables file associated with this entry. This time is a list
3426 of two integers (the same format as `file-attributes'), and is
3427 used to test whether the cache entry is still valid.
3428 Alternatively, MTIME can be nil, which means the entry is always
3432 "Return the variable list for CLASS."
3436 "Collect directory-local variables from MODE-VARIABLES.
3437 VARIABLES is the initial list of variables.
3438 Returns the new list."
3443 ;; If variables are specified more than once, only use the last. (Why?)
3444 ;; The pseudo-variables mode and eval are different (bug#3430).
3447 ;; Need a new cons in case we setcdr later.
3451 "Collect entries from CLASS-VARIABLES into VARIABLES.
3452 ROOT is the root directory of the project.
3453 Return the new variables list."
3456 ;; FIXME: Why not use file-relative-name?
3463 ;; Don't include this in the previous condition, because we
3464 ;; want to filter all strings before the next condition.
3478 ;; TODO someone might want to extend this to allow
3479 ;; integer values for subdir, where N means
3480 ;; variables apply to this directory and N levels
3481 ;; below it (0 == nil).
3484 alist variables))))))))
3486 ;; The file's content might be invalid (e.g. have a merge conflict), but
3487 ;; that shouldn't prevent the user from opening the file.
3489 nil))))
3492 "Declare that the DIRECTORY root is an instance of CLASS.
3493 DIRECTORY is the name of a directory, a string.
3494 CLASS is the name of a project class, a symbol.
3495 MTIME is either the modification time of the directory-local
3496 variables file that defined this class, or nil.
3498 When a file beneath DIRECTORY is visited, the mode-specific
3499 variables from CLASS are applied to the buffer. The variables
3500 for a class are defined using `dir-locals-set-class-variables'."
3507 "Map the type CLASS to a list of variable settings.
3508 CLASS is the project class, a symbol. VARIABLES is a list
3509 that declares directory-local variables for the class.
3510 An element in VARIABLES is either of the form:
3511 (MAJOR-MODE . ALIST)
3512 or
3513 (DIRECTORY . LIST)
3515 In the first form, MAJOR-MODE is a symbol, and ALIST is an alist
3516 whose elements are of the form (VARIABLE . VALUE).
3518 In the second form, DIRECTORY is a directory name (a string), and
3519 LIST is a list of the form accepted by the function.
3521 When a file is visited, the file's class is found. A directory
3522 may be assigned a class using `dir-locals-set-directory-class'.
3523 Then variables are set in the file's buffer according to the
3524 class' LIST. The list is processed in order.
3526 * If the element is of the form (MAJOR-MODE . ALIST), and the
3527 buffer's major mode is derived from MAJOR-MODE (as determined
3528 by `derived-mode-p'), then all the variables in ALIST are
3529 applied. A MAJOR-MODE of nil may be used to match any buffer.
3530 `make-local-variable' is called for each variable before it is
3531 set.
3533 * If the element is of the form (DIRECTORY . LIST), and DIRECTORY
3534 is an initial substring of the file's directory, then LIST is
3535 applied by recursively following these rules."
3542 "File that contains directory-local variables.
3543 It has to be constant to enforce uniform values
3547 "Find the directory-local variables for FILE.
3548 This searches upward in the directory tree from FILE.
3549 It stops at the first directory that has been registered in
3550 `dir-locals-directory-cache' or contains a `dir-locals-file'.
3551 If it finds an entry in the cache, it checks that it is valid.
3552 A cache entry with no modification time element (normally, one that
3553 has been assigned directly using `dir-locals-set-directory-class', not
3554 set from a file) is always valid.
3555 A cache entry based on a `dir-locals-file' is valid if the modification
3556 time stored in the cache matches the current file modification time.
3557 If not, the cache entry is cleared so that the file will be re-read.
3559 This function returns either nil (no directory local variables found),
3560 or the matching entry from `dir-locals-directory-cache' (a list),
3561 or the full path to the `dir-locals-file' (a string) in the case
3562 of no valid cache entry."
3567 dir-locals-file))
3570 ;; `locate-dominating-file' may have abbreviated the name.
3573 ;; Find the best cached value in `dir-locals-directory-cache'.
3585 ;; Found a potential cache entry. Check validity.
3586 ;; A cache entry with no MTIME is assumed to always be valid
3587 ;; (ie, set directly, not from a dir-locals file).
3588 ;; Note, we don't bother to check that there is a matching class
3589 ;; element in dir-locals-class-alist, since that's done by
3590 ;; dir-locals-set-directory-class.
3597 ;; This cache entry is OK.
3598 dir-elt
3599 ;; This cache entry is invalid; clear it.
3602 ;; Return the first existing dir-locals file. Might be the same
3603 ;; as dir-elt's, might not (eg latter might have been deleted).
3604 locals-file)
3605 ;; No cache entry.
3606 locals-file)))
3609 "Load a variables FILE and register a new class and instance.
3610 FILE is the name of the file holding the variables to apply.
3611 The new class name is the same as the directory in which FILE
3612 is found. Returns the new class name."
3622 class-name)))
3625 "Read per-directory local variables for the current buffer.
3626 Store the directory-local variables in `dir-local-variables-alist'
3627 and `file-local-variables-alist', without applying them."
3630 ;; Find the variables file.
3654 "Apply directory-local variables to a non-file buffer.
3655 For non-file buffers, such as Dired buffers, directory-local
3656 variables are looked for in `default-directory' and its parent
3657 directories."
3661 \f
3664 However, the mode will not be changed if
3665 \(1) a local variables list or the `-*-' line specifies a major mode, or
3667 \ not suitable for ordinary files, or
3668 \(3) the new file name does not particularly specify any mode."
3673 "Change name of file visited in current buffer to FILENAME.
3674 This also renames the buffer to correspond to the new file.
3675 The next time the buffer is saved it will go in the newly specified file.
3676 FILENAME nil or an empty string means mark buffer as not visiting any file.
3677 Remember to delete the initial contents of the minibuffer
3678 if you wish to pass an empty string as the argument.
3680 The optional second argument NO-QUERY, if non-nil, inhibits asking for
3681 confirmation in the case where another buffer is already visiting FILENAME.
3683 The optional third argument ALONG-WITH-FILE, if non-nil, means that
3684 the old visited file has been renamed to the new name FILENAME."
3692 nil
3707 filename)))
3714 buffer-file-name filename)
3718 ;; If new-name == old-name, renaming would add a spurious <2>
3719 ;; and it's considered as a feature in rename-buffer.
3725 ;; Abbreviate the file names of the buffer.
3734 nil))
3735 ;; write-file-functions is normally used for things like ftp-find-file
3736 ;; that visit things that are not local files as if they were files.
3737 ;; Changing to visit an ordinary local file instead should flush the hook.
3742 ;; If buffer was read-only because of version control,
3743 ;; that reason is gone now, so make it writable.
3747 ;; Turn off backup files for certain file names.
3748 ;; Since this is a permanent local, the major mode won't eliminate it.
3750 backup-enable-predicate
3756 ;; If auto-save was not already on, turn it on if appropriate.
3760 ;; If auto save is on, start using a new name.
3761 ;; We deliberately don't rename or delete the old auto save
3762 ;; for the old visited file name. This is because perhaps
3763 ;; the user wants to save the new state and then compare with the
3764 ;; previous state from the auto save file.
3767 ;; Rename the old auto save file if any.
3774 ;; Update the major mode, if the file name determines it.
3776 ;; Don't change the mode if it is special.
3779 ;; Don't change the mode if the local variable list specifies it.
3780 ;; The file name can influence whether the local variables apply.
3782 ;; h-l-v also checks it, but might as well be explicit.
3785 ;; TODO consider making normal-mode handle this case.
3793 "Write current buffer into file FILENAME.
3794 This makes the buffer visit that file, and marks it as not modified.
3796 If you specify just a directory name as FILENAME, that means to use
3797 the default file name but in that directory. You can also yank
3798 the default file name into the minibuffer to edit it, using \\<minibuffer-local-map>\\[next-history-element].
3800 If the buffer is not already visiting a file, the default file name
3801 for the output file is the buffer name.
3803 If optional second arg CONFIRM is non-nil, this function
3804 asks for confirmation before overwriting an existing file.
3805 Interactively, confirmation is required unless you supply a prefix argument."
3806 ;; (interactive "FWrite file: ")
3810 nil nil nil nil)
3814 default-directory)
3815 nil nil))
3819 ;; If arg is just a directory,
3820 ;; use the default file name, but in that directory.
3831 ;; Make buffer writable if file is writable.
3836 ;; It's likely that the VC status at the new location is different from
3837 ;; the one at the old location.
3839 \f
3841 "Make a backup of the disk file visited by the current buffer, if appropriate.
3842 This is normally done before saving the buffer the first time.
3844 A backup may be done by renaming or by copying; see documentation of
3845 variable `make-backup-files'. If it's done by renaming, then the file is
3846 no longer accessible under its old name.
3848 The value is non-nil after a backup was made by renaming.
3849 It has the form (MODES SELINUXCONTEXT BACKUPNAME).
3850 MODES is the result of `file-modes' on the original
3851 file; this means that the caller, after saving the buffer, should change
3852 the modes of the new file to agree with the old modes.
3853 SELINUXCONTEXT is the result of `file-selinux-context' on the original
3854 file; this means that the caller, after saving the buffer, should change
3855 the SELinux context of the new file to agree with the old context.
3856 BACKUPNAME is the backup file name, which is the old file renamed."
3863 backup-info backupname targets setmodes)
3864 ;; If specified name is a symbolic link, chase it to the target.
3865 ;; Thus we make the backups in the directory where the real file is.
3870 ;; (if (file-directory-p buffer-file-name)
3871 ;; (error "Cannot save buffer in directory %s" buffer-file-name))
3875 ;; If have old versions to maybe delete,
3876 ;; ask the user to confirm now, before doing anything.
3877 ;; But don't actually delete til later.
3882 real-file-name)))))
3885 ;; Actually write the back up file.
3888 ; (file-symlink-p buffer-file-name)
3889 backup-by-copying
3890 ;; Don't rename a suid or sgid file.
3905 ;; rename-file should delete old backup.
3909 ;; If trouble writing the backup, write it in
3910 ;; .emacs.d/%backup%.
3913 backupname)
3917 ;; Now delete the old versions, if desired.
3924 setmodes)
3931 ;; Create temp files with strict access rights. It's easy to
3932 ;; loosen them later, whereas it's impossible to close the
3933 ;; time-window of loose permissions otherwise.
3936 ;; Try to overwrite old backup first.
3944 nil)
3946 ;; The file was somehow created by someone else between
3947 ;; `delete-file' and `copy-file', so let's try again.
3948 ;; rms says "I think there is also a possible race
3949 ;; condition for making backup files" (emacs-devel 20070821).
3950 nil)))
3951 ;; Reset the umask.
3960 ;; The last ~[[:digit]]+ matches relative versions in git,
3961 ;; e.g. `foo.js.~HEAD~1~'.
3962 "Regular expression matching the backup/version part of a file name.
3966 "Return file NAME sans backup versions or strings.
3967 This is a separate procedure so your site-init or startup file can
3968 redefine it.
3969 If the optional argument KEEP-BACKUP-VERSION is non-nil,
3970 we do not remove backup version numbers, only true file version numbers.
3971 See also `file-name-version-regexp'."
3978 name))))))
3981 "Return t if deleting FILE and rewriting it would preserve the owner."
3986 ;; Return t if the file doesn't exist, since it's true that no
3987 ;; information would be lost by an (attempted) delete and create.
3990 ;; Files created on Windows by Administrator (RID=500)
3991 ;; have the Administrators group (RID=544) recorded as
3992 ;; their owner. Rewriting them will still preserve the
3993 ;; owner.
3999 The extension, in a file name, is the part that follows the last `.',
4000 except that a leading `.', if any, doesn't count."
4003 directory)
4007 ;; Don't use expand-file-name here; if DIRECTORY is relative,
4008 ;; we don't want to expand it.
4011 filename))))
4015 The extension, in a file name, is the part that follows the last `.',
4016 excluding version numbers and backup suffixes,
4017 except that a leading `.', if any, doesn't count.
4018 Return nil for extensionless file names such as `foo'.
4019 Return the empty string for file names such as `foo.'.
4021 If PERIOD is non-nil, then the returned value includes the period
4022 that delimits the extension, and if FILENAME has no extension,
4033 "A function to use instead of the default `make-backup-file-name'.
4034 A value of nil gives the default `make-backup-file-name' behavior.
4036 This could be buffer-local to do something special for specific
4037 files. If you define it, you may need to change `backup-file-name-p'
4038 and `file-name-sans-versions' too.
4040 See also `backup-directory-alist'."
4046 "Alist of filename patterns and backup directory names.
4047 Each element looks like (REGEXP . DIRECTORY). Backups of files with
4048 names matching REGEXP will be made in DIRECTORY. DIRECTORY may be
4049 relative or absolute. If it is absolute, so that all matching files
4050 are backed up into the same directory, the file names in this
4051 directory will be the full name of the file backed up with all
4052 directory separators changed to `!' to prevent clashes. This will not
4053 work correctly if your filesystem truncates the resulting name.
4055 For the common case of all backups going into one directory, the alist
4057 directory name.
4059 If this variable is nil, or it fails to match a filename, the backup
4060 is made in the original file's directory.
4062 On MS-DOS filesystems without long names this variable is always
4063 ignored."
4069 "Default `backup-enable-predicate' function.
4070 Checks for files in `temporary-file-directory',
4071 `small-temporary-file-directory', and /tmp."
4074 ;; Directory is under temporary-file-directory.
4079 ;; Directory is under /tmp.
4084 0 nil
4086 ;; Directory is under small-temporary-file-directory.
4091 "Create the non-numeric backup file name for FILE.
4092 Normally this will just be the file's name with `~' appended.
4093 Customization hooks are provided as follows.
4095 If the variable `make-backup-file-name-function' is non-nil, its value
4096 should be a function which will be called with FILE as its argument;
4097 the resulting name is used.
4099 Otherwise a match for FILE is sought in `backup-directory-alist'; see
4100 the documentation of that variable. If the directory for the backup
4101 doesn't exist, it is created."
4115 "Subroutine of `make-backup-file-name' and `find-backup-file-name'."
4117 elt backup-directory abs-backup-directory)
4122 alist nil)))
4123 ;; If backup-directory is relative, it should be relative to the
4124 ;; file's directory. By expanding explicitly here, we avoid
4125 ;; depending on default-directory.
4134 abs-backup-directory nil))))
4136 file
4140 ;; Normalize DOSish file names: downcase the drive
4141 ;; letter, if any, and replace the leading "x:" with
4142 ;; "/drive_x".
4145 ;; Replace any invalid file-name characters (for the
4146 ;; case of backing up remote files).
4150 "drive_"
4153 ""
4156 ;; Make the name unique by substituting directory
4157 ;; separators. It may not really be worth bothering about
4158 ;; doubling `!'s in the original name...
4163 backup-directory))
4168 "Return non-nil if FILE is a backup file name (numeric or not).
4169 This is a separate function so you can redefine it for customization.
4170 You may need to redefine `file-name-sans-versions' as well."
4175 ;; This is used in various files.
4176 ;; The usage of backup-extract-version-start is not very clean,
4177 ;; but I can't see a good alternative, so as of now I am leaving it alone.
4179 "Given the name of a numeric backup file, FN, return the backup number.
4180 Uses the free variable `backup-extract-version-start', whose value should be
4181 the index in the name where the version number begins."
4188 "Find a file name for a backup file FN, and suggestions for deletions.
4189 Value is a list whose car is the name for the backup file
4190 and whose cdr is a list of old versions to consider deleting now.
4191 If the value is nil, don't make a backup.
4192 Uses `backup-directory-alist' in the same way as does
4193 `make-backup-file-name'."
4195 ;; Run a handler for this function so that ange-ftp can refuse to do it.
4199 ;; We don't support numbered backups on plain MS-DOS
4200 ;; when long file names are unavailable.
4210 possibilities deserve-versions-p versions)
4213 base-versions
4216 possibilities)
4217 #'<)
4222 kept-old-versions
4223 kept-new-versions
4230 ;; Delete nothing if there is overflow
4231 ;; in the number of versions to keep.
4237 v))))))))))
4240 "Return number of names file FILENAME has."
4243 ;; (defun file-relative-name (filename &optional directory)
4244 ;; "Convert FILENAME to be relative to DIRECTORY (default: `default-directory').
4245 ;; This function returns a relative file name which is equivalent to FILENAME
4246 ;; when used with that default directory as the default.
4247 ;; If this is impossible (which can happen on MSDOS and Windows
4248 ;; when the file name and directory use different drive names)
4249 ;; then it returns FILENAME."
4250 ;; (save-match-data
4251 ;; (let ((fname (expand-file-name filename)))
4252 ;; (setq directory (file-name-as-directory
4253 ;; (expand-file-name (or directory default-directory))))
4254 ;; ;; On Microsoft OSes, if FILENAME and DIRECTORY have different
4255 ;; ;; drive names, they can't be relative, so return the absolute name.
4256 ;; (if (and (or (eq system-type 'ms-dos)
4257 ;; (eq system-type 'cygwin)
4258 ;; (eq system-type 'windows-nt))
4259 ;; (not (string-equal (substring fname 0 2)
4260 ;; (substring directory 0 2))))
4261 ;; filename
4262 ;; (let ((ancestor ".")
4263 ;; (fname-dir (file-name-as-directory fname)))
4264 ;; (while (and (not (string-match (concat "^" (regexp-quote directory)) fname-dir))
4265 ;; (not (string-match (concat "^" (regexp-quote directory)) fname)))
4266 ;; (setq directory (file-name-directory (substring directory 0 -1))
4267 ;; ancestor (if (equal ancestor ".")
4268 ;; ".."
4269 ;; (concat "../" ancestor))))
4270 ;; ;; Now ancestor is empty, or .., or ../.., etc.
4271 ;; (if (string-match (concat "^" (regexp-quote directory)) fname)
4272 ;; ;; We matched within FNAME's directory part.
4273 ;; ;; Add the rest of FNAME onto ANCESTOR.
4274 ;; (let ((rest (substring fname (match-end 0))))
4275 ;; (if (and (equal ancestor ".")
4276 ;; (not (equal rest "")))
4277 ;; ;; But don't bother with ANCESTOR if it would give us `./'.
4278 ;; rest
4279 ;; (concat (file-name-as-directory ancestor) rest)))
4280 ;; ;; We matched FNAME's directory equivalent.
4281 ;; ancestor))))))
4284 "Convert FILENAME to be relative to DIRECTORY (default: `default-directory').
4285 This function returns a relative file name which is equivalent to FILENAME
4286 when used with that default directory as the default.
4287 If FILENAME and DIRECTORY lie on different machines or on different drives
4288 on a DOS/Windows machine, it returns FILENAME in expanded form."
4292 default-directory))))
4298 ;; Test for different filesystems on DOS/Windows
4300 ;; Should `cygwin' really be included here? --stef
4303 ;; Test for different drive letters
4305 ;; Test for UNCs on different servers
4310 ;; Windows file names cannot have ? in
4311 ;; them, so use that to detect when
4312 ;; neither FILENAME nor DIRECTORY is a
4313 ;; UNC.
4315 0 nil
4321 ;; Test for different remote file system identification
4323 filename
4329 directory nil nil case-fold-search))
4331 directory nil nil case-fold-search))))
4334 ".."
4336 ;; Now ancestor is empty, or .., or ../.., etc.
4338 directory nil nil case-fold-search))
4339 ;; We matched within FILENAME's directory part.
4340 ;; Add the rest of FILENAME onto ANCESTOR.
4343 ;; But don't bother with ANCESTOR if it would give us `./'.
4344 rest
4346 ;; We matched FILENAME's directory equivalent.
4347 ancestor))))))
4348 \f
4350 "Save current buffer in visited file if modified.
4351 Variations are described below.
4353 By default, makes the previous version into a backup file
4354 if previously requested or if this is the first save.
4356 to become a backup when the next save is done.
4358 unconditionally makes the previous version into a backup file.
4360 to become a backup when the next save is done,
4361 and unconditionally makes the previous version into a backup file.
4363 With a numeric argument of 0, never make the previous version
4364 into a backup file.
4366 If a file's name is FOO, the names of its numbered backup versions are
4367 FOO.~i~ for various integers i. A non-numbered backup file is called FOO~.
4368 Numeric backups (rather than FOO~) will be made if value of
4369 `version-control' is not the atom `never' and either there are already
4370 numeric versions of the file being backed up, or `version-control' is
4371 non-nil.
4372 We don't want excessive versions piling up, so there are variables
4373 `kept-old-versions', which tells Emacs how many oldest versions to keep,
4374 and `kept-new-versions', which tells how many newest versions to keep.
4375 Defaults are 2 old versions and 2 new.
4376 `dired-kept-versions' controls dired's clean-directory (.) command.
4377 If `delete-old-versions' is nil, system will query user
4378 before trimming versions. Otherwise it does it silently.
4380 If `vc-make-backup-files' is nil, which is the default,
4381 no backup files are made for files managed by version control.
4382 (This is because the version control system itself records previous versions.)
4384 See the subroutine `basic-save-buffer' for more information."
4390 ;; We used to display the message below only for files > 50KB, but
4391 ;; then Rmail-mbox never displays it due to buffer swapping. If
4392 ;; the test is ever re-introduced, be sure to handle saving of
4393 ;; Rmail files.
4400 "Delete auto-save file for current buffer if `delete-auto-save-files' is t.
4401 Normally delete only if the file was written by this Emacs since
4402 the last real save, but optional arg FORCE non-nil means delete anyway."
4416 "Normal hook that is run before a buffer is saved to its file."
4422 "Normal hook that is run after a buffer is saved to its file."
4428 "If non-nil, use this coding system for saving the buffer.
4429 More precisely, use this coding system in place of the
4430 value of `buffer-file-coding-system', when saving the buffer.
4431 Calling `write-region' for any purpose other than saving the buffer
4432 will still use `buffer-file-coding-system'; this variable has no effect
4439 "Save the current buffer in its visited file, if it has been modified.
4440 The hooks `write-contents-functions' and `write-file-functions' get a chance
4441 to do the job of saving; if they do not, then the buffer is saved in
4442 the visited file in the usual way.
4443 Before and after saving the buffer, this function runs
4444 `before-save-hook' and `after-save-hook', respectively."
4447 ;; In an indirect buffer, save its base buffer instead.
4451 ;; handle the case when no modification has been made but
4452 ;; the file disappeared since visited
4456 setmodes)
4457 ;; If buffer has no file name, ask user for one.
4464 ;; Signal an error if the user specified the name of an
4465 ;; existing directory.
4468 filename))
4470 ;; Signal an error if the specified name refers to a
4471 ;; non-existing directory.
4482 "%s has changed since visited or saved. Save anyway? "
4502 ;; Support VC version backups.
4508 ;; If a hook returned t, file is already "written".
4509 ;; Otherwise, write it the usual way now.
4511 ;; Now we have saved the current buffer. Let's make sure
4512 ;; that buffer-file-coding-system is fixed to what
4513 ;; actually used for saving by binding it locally.
4525 ;; If the auto-save file was recent before this command,
4526 ;; delete it now.
4528 ;; Support VC `implicit' locking.
4533 ;; This does the "real job" of writing a buffer into its visited file
4534 ;; and making a backup file. This is what is normally done
4535 ;; but inhibited if one of write-file-functions returns non-nil.
4536 ;; It returns a value (MODES SELINUXCONTEXT BACKUPNAME), like backup-buffer.
4548 ;; This returns a value (MODES SELINUXCONTEXT BACKUPNAME), like backup-buffer.
4561 "File %s is write-protected; try to save anyway? "
4563 buffer-file-name)))
4578 ;; Write temp name, then rename it.
4579 ;; This requires write access to the containing dir,
4580 ;; which is why we don't try it if we don't have that access.
4582 tempname succeed
4585 ;; Create temp files with strict access rights. It's easy to
4586 ;; loosen them later, whereas it's impossible to close the
4587 ;; time-window of loose permissions otherwise.
4592 ;; Try various temporary names.
4593 ;; This code follows the example of make-temp-file,
4594 ;; but it calls write-region in the appropriate way
4595 ;; for saving the buffer.
4601 ;; Pass in nil&nil rather than point-min&max
4602 ;; cause we're saving the whole buffer.
4603 ;; write-region-annotate-functions may use it.
4605 tempname nil realname
4607 nil)
4609 ;; The file was somehow created by someone else between
4610 ;; `make-temp-name' and `write-region', let's try again.
4611 nil)
4613 ;; Reset the umask.
4615 ;; If we failed, restore the buffer's modtime.
4618 ;; Since we have created an entirely new file,
4619 ;; make sure it gets the right permission bits set.
4624 buffer-file-name)))
4625 ;; We succeeded in writing the temp file,
4626 ;; so rename it.
4628 ;; If file not writable, see if we can make it writable
4629 ;; temporarily while we write it.
4630 ;; But no need to do so if we have just backed it up
4631 ;; (setmodes is set) because that says we're superseding.
4633 ;; Change the mode back, after writing.
4636 buffer-file-name))
4642 ;; Pass in nil&nil rather than point-min&max to indicate
4643 ;; we're saving the buffer rather than just a region.
4644 ;; write-region-annotate-functions may make us of it.
4646 buffer-file-name nil t buffer-file-truename)
4648 ;; If we get an error writing the new file, and we made
4649 ;; the backup by renaming, undo the backing-up.
4654 setmodes))
4660 `((?\C-r
4667 ;; Return nil to ask about BUF again.
4668 nil)
4681 ;; Return nil to ask about BUF again.
4682 nil)
4692 "Save some modified file-visiting buffers. Asks user about each one.
4693 You can answer `y' to save, `n' not to save, `C-r' to look at the
4694 buffer in question with `view-buffer' before deciding or `d' to
4695 view the differences using `diff-buffer-with-file'.
4697 This command first saves any buffers where `buffer-save-without-query' is
4698 non-nil, without asking.
4700 Optional argument (the prefix) non-nil means save all with no questions.
4701 Optional second argument PRED determines which buffers are considered:
4702 If PRED is nil, all the file-visiting buffers are considered.
4703 If PRED is t, then certain non-file buffers will also be considered.
4704 If PRED is a zero-argument function, it indicates for each buffer whether
4705 to consider it or not when called with that buffer current.
4707 See `save-some-buffers-action-alist' if you want to
4708 change the additional actions you can take on files."
4712 files-done abbrevs-done)
4714 ;; First save any buffers that we're supposed to save unconditionally.
4715 ;; That way the following code won't ask about them.
4720 ;; Ask about those buffers that merit it,
4721 ;; and record the number thus saved.
4725 ;; Note that killing some buffers may kill others via
4726 ;; hooks (e.g. Rmail and its viewing buffer).
4739 t
4751 save-some-buffers-action-alist))
4752 ;; Maybe to save abbrevs, and record whether
4753 ;; we either saved them or asked to.
4760 ;; Don't keep bothering user if he says no.
4773 \f
4775 "Mark current buffer as unmodified, not needing to be saved.
4778 It is not a good idea to use this function in Lisp programs, because it
4779 prints a message in the minibuffer. Instead, use `set-buffer-modified-p'."
4786 "Change whether this buffer is read-only.
4787 With prefix argument ARG, make the buffer read-only if ARG is
4788 positive, otherwise make it writable. If buffer is read-only
4789 and `view-read-only' is non-nil, enter view mode.
4791 This function is usually the wrong thing to use in a Lisp program.
4792 It can have side-effects beyond changing the read-only status of a buffer
4793 \(e.g., enabling view mode), and does not affect read-only regions that
4794 are caused by text properties. To make a buffer read-only in Lisp code,
4795 set `buffer-read-only'. To ignore read-only status (whether due to text
4796 properties or buffer state) and make changes, temporarily bind
4797 `inhibit-read-only'."
4802 nil ; do nothing.
4803 ;; Toggle.
4810 ;; If view-mode is already active, `view-mode-enter' is a nop.
4818 "Insert contents of file FILENAME into buffer after point.
4819 Set mark after the inserted text.
4821 This function is meant for the user to run interactively.
4822 Don't call it from programs! Use `insert-file-contents' instead.
4823 \(Its calling sequence is different; see its documentation)."
4828 "Append the contents of the region to the end of file FILENAME.
4829 When called from a function, expects three arguments,
4830 START, END and FILENAME. START and END are normally buffer positions
4831 specifying the part of the buffer to write.
4832 If START is nil, that means to use the entire buffer contents.
4833 If START is a string, then output that string to the file
4834 instead of any buffer contents; END is ignored.
4836 This does character code conversion and applies annotations
4837 like `write-region' does."
4842 "Return most recent backup file for FILENAME or nil if no backups exist."
4843 ;; `make-backup-file-name' will get us the right directory for
4844 ;; ordinary or numeric backups. It might create a directory for
4845 ;; backups as a side-effect, according to `backup-directory-alist'.
4852 tem)
4861 newest))
4864 "Rename current buffer to a similar name not already taken.
4865 This function is useful for creating multiple shell process buffers
4866 or multiple mail buffers, etc."
4874 ;; If the existing buffer name has a <NNN>,
4875 ;; which isn't part of the file name (if any),
4876 ;; then get rid of that.
4882 "Create the directory DIR and optionally any nonexistent parent dirs.
4883 If DIR already exists as a directory, signal an error, unless
4884 PARENTS is non-nil.
4886 Interactively, the default choice of directory to create is the
4887 current buffer's default directory. That is useful when you have
4888 visited a file in a nonexistent directory.
4890 Noninteractively, the second (optional) argument PARENTS, if
4891 non-nil, says whether to create parent directories that don't
4892 exist. Interactively, this happens by default.
4894 If creating the directory or directories fail, an error will be
4895 raised."
4898 nil nil)
4899 t))
4900 ;; If default-directory is a remote directory,
4901 ;; make sure we find its make-directory handler.
4909 create-list)
4911 ;; If directory is its own parent, then we can't
4912 ;; keep looping forever
4927 "Delete the directory named DIRECTORY. Does not follow symlinks.
4928 If RECURSIVE is non-nil, all files in DIRECTORY are deleted as well.
4929 TRASH non-nil means to trash the directory instead, provided
4930 `delete-by-moving-to-trash' is non-nil.
4932 When called interactively, TRASH is t if no prefix argument is
4933 given. With a prefix argument, TRASH is nil."
4940 "Move directory to trash: "
4942 default-directory default-directory nil nil))))
4948 nil)
4950 ;; If default-directory is a remote directory, make sure we find its
4951 ;; delete-directory handler.
4958 ;; Only move non-empty dir to trash if recursive deletion was
4959 ;; requested. This mimics the non-`delete-by-moving-to-trash'
4960 ;; case, where the operation fails in delete-directory-internal.
4961 ;; As `move-file-to-trash' trashes directories (empty or
4962 ;; otherwise) as a unit, we do not need to recurse here.
4964 ;; Check if directory is empty apart from "." and "..".
4969 ;; Otherwise, call ourselves recursively if needed.
4973 ;; This test is equivalent to
4974 ;; (and (file-directory-p fn) (not (file-symlink-p fn)))
4975 ;; but more efficient
4979 ;; We do not want to delete "." and "..".
4985 "Copy DIRECTORY to NEWNAME. Both args must be strings.
4986 This function always sets the file modes of the output files to match
4987 the corresponding input file.
4989 The third arg KEEP-TIME non-nil means give the output files the same
4990 last-modified time as the old ones. (This works on only some systems.)
4992 A prefix arg makes KEEP-TIME non-nil.
4994 Noninteractively, the last argument PARENTS says whether to
4995 create parent directories if they don't exist. Interactively,
4996 this happens by default.
4998 If NEWNAME names an existing directory, copy DIRECTORY as a
4999 subdirectory there. However, if called from Lisp with a non-nil
5000 optional argument COPY-CONTENTS, copy the contents of DIRECTORY
5001 directly into NEWNAME instead."
5008 default-directory default-directory nil nil)
5009 current-prefix-arg t nil)))
5010 ;; If default-directory is a remote directory, make sure we find its
5011 ;; copy-directory handler.
5017 ;; Compute target name.
5022 ;; If NEWNAME is not an existing directory, create it;
5023 ;; that is where we will copy the files of DIRECTORY.
5025 ;; If NEWNAME is an existing directory and COPY-CONTENTS
5026 ;; is nil, copy into NEWNAME/[DIRECTORY-BASENAME].
5031 newname))
5035 newname))
5038 ;; Copy recursively.
5040 ;; We do not want to copy "." and "..".
5042 directory-files-no-dot-files-regexp))
5051 ;; Set directory attributes.
5056 \f
5059 "Function to use to revert this buffer, or nil to do the default.
5060 The function receives two arguments IGNORE-AUTO and NOCONFIRM,
5065 "Function to use to insert contents when reverting this buffer.
5066 Gets two args, first the nominal file name to use,
5067 and second, t if reading the auto-save file.
5072 "Function to check whether a non-file buffer needs reverting.
5073 This should be a function with one optional argument NOCONFIRM.
5074 Auto Revert Mode passes t for NOCONFIRM. The function should return
5075 non-nil if the buffer should be reverted. A return value of
5076 `fast' means that the need for reverting was not checked, but
5077 that reverting the buffer is fast. The buffer is current when
5078 this function is called.
5080 The idea behind the NOCONFIRM argument is that it should be
5081 non-nil if the buffer is going to be reverted without asking the
5082 user. In such situations, one has to be careful with potentially
5083 time consuming operations.
5085 For more information on how this variable is used by Auto Revert mode,
5089 "Normal hook for `revert-buffer' to run before reverting.
5090 If `revert-buffer-function' is used to override the normal revert
5094 "Normal hook for `revert-buffer' to run after reverting.
5095 Note that the hook value that it runs is the value that was in effect
5096 before reverting; that makes a difference if you have buffer-local
5097 hook functions.
5099 If `revert-buffer-function' is used to override the normal revert
5103 "Non-nil if a `revert-buffer' operation is in progress, nil otherwise.
5109 "Replace current buffer text with the text of the visited file on disk.
5110 This undoes all changes since the file was visited or saved.
5111 With a prefix argument, offer to revert from latest auto-save file, if
5112 that is more recent than the visited file.
5114 This command also implements an interface for special buffers
5115 that contain text which doesn't come from a file, but reflects
5116 some other data instead (e.g. Dired buffers, `buffer-list'
5117 buffers). This is done via the variable `revert-buffer-function'.
5118 In these cases, it should reconstruct the buffer contents from the
5119 appropriate data.
5121 When called from Lisp, the first argument is IGNORE-AUTO; only offer
5122 to revert from the auto-save file when this is nil. Note that the
5123 sense of this argument is the reverse of the prefix argument, for the
5124 sake of backward compatibility. IGNORE-AUTO is optional, defaulting
5125 to nil.
5127 Optional second argument NOCONFIRM means don't ask for confirmation
5128 at all. (The variable `revert-without-query' offers another way to
5129 revert buffers without querying for confirmation.)
5131 Optional third argument PRESERVE-MODES non-nil means don't alter
5132 the files modes. Normally we reinitialize them using `normal-mode'.
5134 If the value of `revert-buffer-function' is non-nil, it is called to
5135 do all the work for this command. Otherwise, the hooks
5136 `before-revert-hook' and `after-revert-hook' are run at the beginning
5137 and the end, and if `revert-buffer-insert-file-contents-function' is
5138 non-nil, it is called instead of rereading visited file contents."
5140 ;; I admit it's odd to reverse the sense of the prefix argument, but
5141 ;; there is a lot of code out there which assumes that the first
5142 ;; argument should be t to avoid consulting the auto-save file, and
5143 ;; there's no straightforward way to encourage authors to notice a
5144 ;; reversal of the argument sense. So I'm just changing the user
5145 ;; interface, but leaving the programmatic interface the same.
5155 buffer-auto-save-file-name
5160 buffer-auto-save-file-name
5161 buffer-file-name)))
5171 file-name)))
5173 ;; If file was backed up but has changed since,
5174 ;; we should make another backup.
5178 ;; Effectively copy the after-revert-hook status,
5179 ;; since after-find-file will clobber it.
5182 after-revert-hook))
5187 ;; Get rid of all undo records for this buffer.
5189 ;; Don't make undo records for the reversion.
5192 file-name auto-save-p)))
5195 "File %s no longer exists!"
5197 file-name))
5200 "File %s no longer readable!"
5202 file-name))
5204 ;; Bind buffer-file-name to nil
5205 ;; so that we don't try to lock the file.
5211 ;; Auto-saved file should be read by Emacs'
5212 ;; internal coding.
5216 buffer-file-coding-system-explicit
5219 coding-system-for-read
5221 coding-system-for-read)
5223 ;; As a coding system suitable for multibyte
5224 ;; buffer is specified, make the current
5225 ;; buffer multibyte.
5228 ;; This force after-insert-file-set-coding
5229 ;; (called from insert-file-contents) to set
5230 ;; buffer-file-coding-system to a proper value.
5233 ;; Note that this preserves point in an intelligent way.
5237 nil nil t))
5239 nil nil t)))))
5240 ;; Recompute the truename in case changes in symlinks
5241 ;; have changed the truename.
5245 ;; Run after-revert-hook as it was before we reverted.
5249 local-hook)
5252 t))))))
5255 "Recover the visited file--get contents from its last auto-save file."
5260 "Visit file FILE, but get contents from its last auto-save file."
5261 ;; Actually putting the file name in the minibuffer should be used
5262 ;; only rarely.
5263 ;; Not just because users often use the default.
5283 ;; Use insert-directory-safely, not insert-directory,
5284 ;; because these files might not exist. In particular,
5285 ;; FILE might not exist if the auto-save file was for
5286 ;; a buffer that didn't visit a file, such as "*mail*".
5287 ;; The code in v20.x called `ls' directly, so we need
5288 ;; to emulate what `ls' did in that case.
5294 ;; Keep the current buffer-file-coding-system.
5296 ;; Auto-saved file should be read with special coding.
5305 "Recover auto save files from a previous Emacs session.
5306 This command first displays a Dired buffer showing you the
5307 previous sessions that you could recover from.
5308 To choose one, move point to the proper line and then type C-c C-c.
5309 Then you'll be asked about a number of files to recover."
5319 auto-save-list-file-prefix)))
5320 t)
5329 ;; Each line starts with a space
5330 ;; so that Font Lock mode won't highlight the first character.
5339 "Choose one saved session to recover auto-save files from.
5340 This command is used in the special Dired buffer created by
5343 ;; Get the name of the session file to recover from.
5345 files
5351 ;; Read in the auto-save-list file.
5354 ;; Loop thru the text of that file
5355 ;; and get out the names of the files to recover.
5359 ;; This is a pair of lines for a non-file-visiting buffer.
5360 ;; Get the auto-save file name and manufacture
5361 ;; a "visited file name" from that.
5364 ;; If there is no auto-save file name, the
5365 ;; auto-save-list file is probably corrupted.
5378 ;; This pair of lines is a file-visiting
5379 ;; buffer. Use the visited file name.
5389 ;; Ignore a file if its auto-save file does not exist now.
5393 ;; The file contains a pair of line for each auto-saved buffer.
5394 ;; The first line of the pair contains the visited file name
5395 ;; or is empty if the buffer was not visiting a file.
5396 ;; The second line is the auto-save file name.
5404 files
5410 "Kill BUFFER if confirmed."
5418 "Kill some buffers. Asks the user whether to kill each one of them.
5419 Non-interactively, if optional argument LIST is non-nil, it
5420 specifies the list of buffers to kill, asking for approval for each one."
5428 ; if we killed the base buffer.
5435 "Kill buffers whose name matches the specified REGEXP.
5436 The optional second argument indicates whether to kill internal buffers too."
5445 \f
5447 "Adjust current buffer's auto save file name for current conditions.
5448 Also rename any existing auto save file, if it was made in this session."
5460 "Return file name to use for auto-saves of current buffer.
5461 Does not consider `auto-save-visited-file-name' as that variable is checked
5462 before calling this function. You can redefine this for customization.
5463 See also `auto-save-file-name-p'."
5471 result uniq)
5472 ;; Apply user-specified translations
5473 ;; to the file name.
5477 filename)
5487 filename))))
5492 ;; We truncate the file name to DOS 8+3 limits
5493 ;; before doing anything else, because the regexp
5494 ;; passed to string-match below cannot handle
5495 ;; extensions longer than 3 characters, multiple
5496 ;; dots, and other atrocities.
5501 fn)
5506 "#"
5509 ;; Make sure auto-save file names don't contain characters
5510 ;; invalid for the underlying filesystem.
5512 ;; Don't modify remote (ange-ftp) filenames
5515 result))))
5517 ;; Deal with buffers that don't have any associated files. (Mail
5518 ;; mode tends to create a good number of these.)
5522 file-name)
5523 ;; Restrict the characters used in the file name to those which
5524 ;; are known to be safe on all filesystems, url-encoding the
5525 ;; rest.
5526 ;; We do this on all platforms, because even if we are not
5527 ;; running on DOS/Windows, the current directory may be on a
5528 ;; mounted VFAT filesystem, such as a USB memory stick.
5532 ;; For multibyte characters, this will produce more than
5533 ;; 2 hex digits, so is not true URL encoding.
5537 ;; Generate the file name.
5543 ;; Try a few alternative directories, to get one we can
5544 ;; write it.
5550 ;; Don't modify remote (ange-ftp) filenames
5552 ;; The call to convert-standard-filename is in case
5553 ;; buffer-name includes characters not allowed by the
5554 ;; DOS/Windows filesystems. make-temp-file writes to the
5555 ;; file it creates, so we must fix the file name _before_
5556 ;; make-temp-file is called.
5558 fname))
5560 ;; make-temp-file creates the file,
5561 ;; but we don't want it to exist until we do an auto-save.
5565 file-name)))
5568 "Return non-nil if FILENAME can be yielded by `make-auto-save-file-name'.
5569 FILENAME should lack slashes. You can redefine this for customization."
5571 \f
5573 "Given a shell file name pattern WILDCARD, return an equivalent regexp.
5574 The generated regexp will match a filename only if the filename
5575 matches that wildcard according to shell rules. Only wildcards known
5576 by `sh' are supported."
5578 ;; Copy the initial run of non-special characters.
5581 ;; If no special characters, we're almost done.
5585 j)
5587 result
5608 ;; Found "[^". Insert a `\0' character
5609 ;; (which cannot happen in a filename)
5610 ;; into the character class, so that `^'
5611 ;; is not the first character after `[',
5612 ;; and thus non-special in a regexp.
5617 ;; I don't think `]' can appear in a
5618 ;; character class in a wildcard, but
5619 ;; let's be general here.
5626 i
5639 ;; Shell wildcards should match the entire filename,
5640 ;; not its part. Make the regexp say so.
5642 \f
5645 "Switches for `list-directory' to pass to `ls' for brief listing."
5651 "Switches for `list-directory' to pass to `ls' for verbose listing."
5656 "Expand wildcard pattern PATTERN.
5657 This returns a list of file names which match the pattern.
5659 If PATTERN is written as an absolute file name,
5660 the values are absolute also.
5662 If PATTERN is written as a relative file name, it is interpreted
5663 relative to the current default directory, `default-directory'.
5664 The file names returned are normally also relative to the current
5665 default directory. However, if FULL is non-nil, they are absolute."
5669 ;; A list of all dirs that DIRPART specifies.
5670 ;; This can be more than one dir
5671 ;; if DIRPART contains wildcards.
5675 dirpart)))
5679 contents)
5685 ;; Filter out "." and ".."
5690 name))
5697 this-dir-contents)
5698 this-dir-contents)
5699 contents))))
5701 contents)))
5703 ;; Let Tramp know that `file-expand-wildcards' does not need an advice.
5707 "Display a list of files in or matching DIRNAME, a la `ls'.
5708 DIRNAME is globbed by the shell if necessary.
5709 Prefix arg (second arg if noninteractive) means supply -l switch to `ls'.
5710 Actions controlled by variables `list-directory-brief-switches'
5711 and `list-directory-verbose-switches'."
5715 nil default-directory nil)
5716 pfx)))
5718 list-directory-brief-switches))
5719 buffer)
5731 ;; Finishing with-output-to-temp-buffer seems to clobber default-directory.
5739 "Quote characters special to the shell in PATTERN, leave wildcards alone.
5741 PATTERN is assumed to represent a file-name wildcard suitable for the
5742 underlying filesystem. For Unix and GNU/Linux, each character from the
5744 the parts of the pattern which don't include wildcard characters are
5745 quoted with double quotes.
5748 on Windows), so PATTERN can use them to quote wildcard characters that
5749 need to be passed verbatim to shell commands."
5753 ;; DOS/Windows don't allow `"' in file names. So if the
5754 ;; argument has quotes, we can safely assume it is already
5755 ;; quoted by the caller.
5757 ;; We quote [&()#$'] in case their shell is a port of a
5758 ;; Unixy shell. We quote [,=+] because stock DOS and
5759 ;; Windows shells require that in some cases, such as
5760 ;; passing arguments to batch files that use positional
5761 ;; arguments like %1.
5763 pattern
5766 end)
5783 pattern))))
5790 "Program to get the amount of free space on a file system.
5791 We assume the output has the format of `df'.
5792 The value of this variable must be just a command name or file name;
5793 if you want to specify options, use `directory-free-space-args'.
5795 A value of nil disables this feature.
5797 If the function `file-system-info' is defined, it is always used in
5798 preference to the program given by this variable."
5804 "Options to use when running `directory-free-space-program'."
5809 "Return the amount of free space on directory DIR's file system.
5810 The return value is a string describing the amount of free
5811 space (normally, the number of free 1KB blocks).
5813 This function calls `file-system-info' if it is available, or
5814 invokes the program specified by `directory-free-space-program'
5815 and `directory-free-space-args'. If the system call or program
5816 is unsuccessful, or if DIR is a remote directory, this function
5817 returns nil."
5819 ;; Try to find the number of free blocks. Non-Posix systems don't
5820 ;; always have df, but might have an equivalent system call.
5829 ;; Avoid failure if the default directory does
5830 ;; not exist (Bug#2631, Bug#3911).
5833 nil t nil
5834 directory-free-space-args
5835 dir)
5837 ;; Assume that the "available" column is before the
5838 ;; "capacity" column. Find the "%" and scan backward.
5842 "[[:space:]]+[^[:space:]]+%[^%]*$"
5849 ;; The following expression replaces `dired-move-to-filename-regexp'.
5853 ;; In some locales, month abbreviations are as short as 2 letters,
5854 ;; and they can be followed by ".".
5855 ;; In Breton, a month name can include a quote character.
5868 s "+"
5871 ;; Japanese MS-Windows ls-lisp has one-digit months, and
5872 ;; omits the Kanji characters after month and day-of-month.
5873 ;; On Mac OS X 10.3, the date format in East Asian locales is
5874 ;; day-of-month digits followed by month digits.
5880 ;; The "[0-9]" below requires the previous column to end in a digit.
5881 ;; This avoids recognizing `1 may 1997' as a date in the line:
5882 ;; -r--r--r-- 1 may 1997 1168 Oct 19 16:49 README
5884 ;; The "[BkKMGTPEZY]?" below supports "ls -alh" output.
5886 ;; For non-iso date formats, we add the ".*" in order to find
5887 ;; the last possible match. This avoids recognizing
5888 ;; `jservice 10 1024' as a date in the line:
5889 ;; drwxr-xr-x 3 jservice 10 1024 Jul 2 1997 esg-host
5891 ;; vc dired listings provide the state or blanks between file
5892 ;; permissions and date. The state is always surrounded by
5893 ;; parentheses:
5894 ;; -rw-r--r-- (modified) 2005-10-22 21:25 files.el
5895 ;; This is not supported yet.
5900 "Regular expression to match up to the file name in a directory listing.
5901 The default value is designed to recognize dates and times
5906 ;; insert-directory
5907 ;; - must insert _exactly_one_line_ describing FILE if WILDCARD and
5908 ;; FULL-DIRECTORY-P is nil.
5909 ;; The single line of output must display FILE's name as it was
5910 ;; given, namely, an absolute path name.
5911 ;; - must insert exactly one line for each file if WILDCARD or
5912 ;; FULL-DIRECTORY-P is t, plus one optional "total" line
5913 ;; before the file lines, plus optional text after the file lines.
5914 ;; Lines are delimited by "\n", so filenames containing "\n" are not
5915 ;; allowed.
5916 ;; File lines should display the basename.
5917 ;; - must be consistent with
5918 ;; - functions dired-move-to-filename, (these two define what a file line is)
5919 ;; dired-move-to-end-of-filename,
5920 ;; dired-between-files, (shortcut for (not (dired-move-to-filename)))
5921 ;; dired-insert-headerline
5922 ;; dired-after-subdir-garbage (defines what a "total" line is)
5923 ;; - variable dired-subdir-regexp
5924 ;; - may be passed "--dired" as the first argument in SWITCHES.
5925 ;; Filename handlers might have to remove this switch if their
5926 ;; "ls" command does not support it.
5928 "Insert directory listing for FILE, formatted according to SWITCHES.
5929 Leaves point after the inserted text.
5930 SWITCHES may be a string of options, or a list of strings
5931 representing individual options.
5932 Optional third arg WILDCARD means treat FILE as shell wildcard.
5933 Optional fourth arg FULL-DIRECTORY-P means file is a directory and
5934 switches do not contain `d', so that a full listing is expected.
5936 This works by running a directory listing program
5937 whose name is in the variable `insert-directory-program'.
5938 If WILDCARD, it also runs the shell specified by `shell-file-name'.
5940 When SWITCHES contains the long `--dired' option, this function
5941 treats it specially, for the sake of dired. However, the
5942 normally equivalent short `-D' option is just passed on to
5943 `insert-directory-program', as any other option."
5944 ;; We need the directory in order to find the right handler.
5949 wildcard full-directory-p)
5952 ;; Read the actual directory using `insert-directory-program'.
5953 ;; RESULT gets the status code.
5955 ;; putting text property `dired-filename, decode one
5956 ;; bunch by one to preserve that property.
5958 ;; This is to control encoding the arguments in call-process.
5962 default-file-name-coding-system))))
5965 ;; Run ls in the directory part of the file pattern
5966 ;; using the last component as argument.
5972 ;; NB since switches is passed to the shell, be
5973 ;; careful of malicious values, eg "-l;reboot".
5974 ;; See eg dired-safe-switches-p.
5976 shell-file-name nil t nil
5977 "-c"
5979 ""
5981 insert-directory-program
5982 " -d "
5984 switches
5986 " -- "
5987 ;; Quote some characters that have
5988 ;; special meanings in shells; but
5989 ;; don't quote the wildcards--we want
5990 ;; them to be special. We also
5991 ;; currently don't quote the quoting
5992 ;; characters in case people want to
5993 ;; use them explicitly to quote
5994 ;; wildcard characters.
5996 ;; SunOS 4.1.3, SVr4 and others need the "." to list the
5997 ;; directory if FILE is a symbolic link.
6004 insert-directory-program nil t nil
6008 ;; Split the switches at any spaces so we can
6009 ;; pass separate options as separate args.
6011 ;; Avoid lossage if FILE starts with `-'.
6019 file))))))))
6021 ;; If we got "//DIRED//" in the output, it means we got a real
6022 ;; directory listing, even if `ls' returned nonzero.
6023 ;; So ignore any errors.
6036 ;; The first time ls returns an error,
6037 ;; find the version numbers of ls,
6038 ;; and set insert-directory-ls-version
6039 ;; to > if it is more than 5.2.1, < if it is less, nil if it
6040 ;; is equal or if the info cannot be obtained.
6041 ;; (That can mean it isn't GNU ls.)
6051 comparison)
6067 ;; For GNU ls versions 5.2.2 and up, ignore minor errors.
6071 ;; If `insert-directory-program' failed, signal an error.
6073 ;; Delete the error message it may have output.
6075 ;; On non-Posix systems, we cannot open a directory, so
6076 ;; don't even try, because that will always result in
6077 ;; the ubiquitous "Access denied". Instead, show the
6078 ;; command line so the user can try to guess what went wrong.
6083 insert-directory-program
6085 file result)
6086 ;; Unix. Access the file to get a suitable error.
6093 ;; The following overshoots by one line for an empty
6094 ;; directory listed with "--dired", but without "-a"
6095 ;; switch, where the ls output contains a
6096 ;; "//DIRED-OPTIONS//" line, but no "//DIRED//" line.
6097 ;; We take care of that case later.
6105 error-lines)
6106 ;; Find all the lines that are error messages,
6107 ;; and record the bounds of each one.
6114 ;; Now read the numeric positions of file names.
6121 error-lines))
6124 error-lines)))
6126 ;; End is followed by \n or by " -> ".
6128 ;; It seems that we can't trust ls's output as to
6129 ;; byte positions of filenames.
6135 ;; Take care of the case where the ls output contains a
6136 ;; "//DIRED-OPTIONS//"-line, but no "//DIRED//"-line
6137 ;; and we went one line too far back (see above).
6142 ;; Now decode what read if necessary.
6144 file-name-coding-system
6145 default-file-name-coding-system
6147 coding-no-eol
6148 val pos)
6152 ;; If no coding system is specified or detection is
6153 ;; requested, detect the coding.
6167 ;; Force no eol conversion on a file name, so
6168 ;; that CR is preserved.
6176 ;; Try to insert the amount of free space.
6179 ;; First find the line to put it on.
6183 ;; Replace "total" with "used", to avoid confusion.
6189 "Convert `ls --dired' file name position value POS to a buffer position.
6190 File name position values returned in ls --dired output
6191 count only stdout; they don't count the error messages sent to stderr.
6192 So this function converts to them to real buffer positions.
6193 ERROR-LINES is a list of buffer positions of error message lines,
6194 of the form (START END)."
6198 pos)
6202 "Insert directory listing for FILE, formatted according to SWITCHES.
6204 Like `insert-directory', but if FILE does not exist, it inserts a
6205 message to that effect instead of signaling an error."
6208 ;; Simulate the message printed by `ls'.
6212 "Functions to call with no arguments to query about killing Emacs.
6213 If any of these functions returns nil, killing Emacs is canceled.
6214 `save-buffers-kill-emacs' calls these functions, but `kill-emacs',
6218 "How to ask for confirmation when leaving Emacs.
6219 If nil, the default, don't ask at all. If the value is non-nil, it should
6220 be a predicate function such as `yes-or-no-p'."
6228 "Offer to save each buffer, then kill this Emacs process.
6229 With prefix ARG, silently save all file-visiting buffers, then kill."
6238 ;; process-list is not defined on MSDOS.
6240 active)
6249 ;; Query the user for other things, perhaps.
6256 "Offer to save each buffer, then kill the current connection.
6257 If the current frame has no client, kill Emacs itself.
6259 With prefix ARG, silently save all file-visiting buffers, then kill.
6261 If emacsclient was started with a list of filenames to edit, then
6262 only these files will be asked to be saved."
6267 \f
6268 ;; We use /: as a prefix to "quote" a file name
6269 ;; so that magic file name handlers will not apply to it.
6273 file-name-handler-alist))
6275 ;; We depend on being the last handler on the list,
6276 ;; so that anything else which does need handling
6277 ;; has been handled already.
6278 ;; So it is safe for us to inhibit *all* magic file name handlers.
6287 default-directory))
6288 ;; Get a list of the indices of the args which are file names.
6291 ;; The first six are special because they
6292 ;; return a file name. We want to include the /:
6293 ;; in the return value.
6294 ;; So just avoid stripping it in the first place.
6301 ;; `identity' means just return the first arg
6302 ;; not stripped of its quoting.
6304 ;; `add' means add "/:" to the result.
6307 ;; `unquote-then-quote' means set buffer-file-name
6308 ;; temporarily to unquoted filename.
6310 ;; List the arguments which are filenames.
6318 ;; For all other operations, treat the first argument only
6319 ;; as the file name.
6321 method
6322 ;; Copy ARGUMENTS so we can replace elements in it.
6326 ;; Strip off the /: from the file names that have it.
6334 "/"
6351 \f
6352 ;; Symbolic modes and read-file-modes.
6355 "Convert CHAR to a numeric bit-mask for extracting mode bits.
6356 CHAR is in [ugoa] and represents the category of users (Owner, Group,
6357 Others, or All) for whom to produce the mask.
6358 The bit-mask that is returned extracts from mode bits the access rights
6359 for the specified category of users."
6367 "Convert CHAR to a numeric value of mode bits.
6368 CHAR is in [rwxXstugo] and represents symbolic access permissions.
6369 If CHAR is in [Xugo], the value is taken from FROM (or 0 if omitted)."
6376 ;; Rights relative to the previous file modes.
6387 "Convert a symbolic mode string specification to an equivalent number.
6389 WHO-MASK is the bit-mask specifying the category of users to which to
6390 apply the access permissions. See `file-modes-char-to-who'.
6391 FROM (or 0 if nil) gives the mode bits on which to base permissions if
6392 RIGHTS request to add, remove, or set permissions based on existing ones,
6399 char-right)
6406 num-rights
6410 op char-right)))
6411 num-rights))
6414 "Convert symbolic file modes to numeric file modes.
6415 MODES is the string to convert, it should match
6417 See Info node `(coreutils)File permissions' for more information on this
6418 notation.
6419 FROM (or 0 if nil) gives the mode bits on which to base permissions if
6420 MODES request to add, remove, or set permissions based on existing ones,
6434 num-who num-modes)
6437 num-modes)))
6440 "Read file modes in octal or symbolic notation and return its numeric value.
6441 PROMPT is used as the prompt, default to `File modes (octal or symbolic): '.
6442 ORIG-FILE is the name of a file on whose mode bits to base returned
6443 permissions if what user types requests to add, remove, or set permissions
6459 nil nil default)))
6465 \f
6466 ;; Trashcan handling.
6468 "Directory for `move-file-to-trash' to move files and directories to.
6469 This directory is only used when the function `system-move-file-to-trash'
6470 is not defined.
6471 Relative paths are interpreted relative to `default-directory'.
6472 If the value is nil, Emacs uses a freedesktop.org-style trashcan."
6482 "Move the file (or directory) named FILENAME to the trash.
6483 When `delete-by-moving-to-trash' is non-nil, this function is
6484 called by `delete-file' and `delete-directory' instead of
6485 deleting files outright.
6487 If the function `system-move-file-to-trash' is defined, call it
6488 with FILENAME as an argument.
6489 Otherwise, if `trash-directory' is non-nil, move FILENAME to that
6490 directory.
6491 Otherwise, trash FILENAME using the freedesktop.org conventions,
6492 like the GNOME, KDE and XFCE desktop environments. Emacs only
6496 ;; If `trash-directory' is non-nil, move the file there.
6500 trash-dir)))
6501 ;; We can't trash a parent directory of trash-directory.
6504 trash-dir filename))
6507 ;; Ensure that the trashed file-name is unique.
6514 ;; If `system-move-file-to-trash' is defined, use it.
6517 ;; Otherwise, use the freedesktop.org method, as specified at
6518 ;; http://freedesktop.org/wiki/Specifications/trash-spec
6529 ;; Check if we have permissions to delete.
6533 ;; The trashed file cannot be the trash dir or its parent.
6536 trash-files-dir filename))
6539 trash-info-dir filename))
6541 ;; Ensure that the trash directory exists; otherwise, create it.
6552 ;; Try to move to trash with .trashinfo undo information
6557 ;; Perform url-encoding on FN. For compatibility with
6558 ;; other programs (e.g. XFCE Thunar), allow literal "/"
6559 ;; for path separators.
6564 ?n ?o ?p ?q ?r ?s ?t ?u ?v ?w ?x ?y ?z ?A
6565 ?B ?C ?D ?E ?F ?G ?H ?I ?J ?K ?L ?M ?N ?O
6578 fn))
6583 ;; Attempt to make .trashinfo file, trying up to 5
6584 ;; times. The .trashinfo file is opened with O_EXCL,
6585 ;; as per trash-spec 0.7, even if that can be a problem
6586 ;; on old NFS versions...
6590 trash-files-dir))
6592 success info-fn)
6597 trash-info-dir))
6605 ;; Uniquify new-fn. (Some file managers do not
6606 ;; like Emacs-style backup file names---e.g. bug
6607 ;; 170956 in Konqueror bug tracker.)
6612 ;; Finally, try to move the file to the trashcan.
6616 \f
6641 ;;; files.el ends here