| blob | 72cfc89ef8c1109dff69536f8f6aad23ca61d20e |
1 ;;; files.el --- file input and output commands for Emacs
3 ;; Copyright (C) 1985-1987, 1992-2011 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."
156 "Non-nil means find a file under alternative names, in existing buffers.
157 This means if any existing buffer is visiting the file you want
158 under another name, you get the existing buffer instead of a new buffer."
163 "Non-nil means visit a file under its truename.
164 The truename of a file is found by chasing all links
165 both at the file level and at the levels of the containing directories."
171 "Specify which files should be reverted without query.
172 The value is a list of regular expressions.
173 If the file name matches one of these regular expressions,
174 then `revert-buffer' reverts the file without querying
175 if the file has changed on disk and you have not edited the buffer."
180 "The device number and file number of the file visited in the current buffer.
181 The value is a list of the form (FILENUM DEVNUM).
182 This pair of numbers uniquely identifies the file.
196 "The directory for writing small temporary files.
197 If non-nil, this directory is used instead of `temporary-file-directory'
198 by programs that create small temporary files. This is for systems that
199 have fast storage with limited space, such as a RAM disk."
204 ;; The system null device. (Should reference NULL_DEVICE from C.)
232 "Non-nil means protect against I/O errors while saving files.
233 Some modes set this non-nil in particular buffers.
235 This feature works by writing the new contents into a temporary file
236 and then renaming the temporary file to replace the original.
237 In this way, any I/O error in writing leaves the original untouched,
238 and there is never any instant where the file is nonexistent.
240 Note that this feature forces backups to be made by copying.
241 Yet, at the same time, saving a precious file
242 breaks any hard links between it and other files.
244 This feature is advisory: for example, if the directory in which the
245 file is being saved is not writable, Emacs may ignore a non-nil value
246 of `file-precious-flag' and write directly into the file.
248 See also: `break-hardlink-on-save'."
253 "Non-nil means when saving a file that exists under several names
254 \(i.e., has multiple hardlinks), break the hardlink associated with
255 `buffer-file-name' and write to a new file, so that the other
256 instances of the file are not affected by the save.
258 If `buffer-file-name' refers to a symlink, do not break the symlink.
260 Unlike `file-precious-flag', `break-hardlink-on-save' is not advisory.
261 For example, if the directory in which a file is being saved is not
262 itself writable, then error instead of saving in some
263 hardlink-nonbreaking way.
265 See also `backup-by-copying' and `backup-by-copying-when-linked'."
271 "Control use of version numbers for backup files.
272 When t, make numeric backup versions unconditionally.
273 When nil, make them for files that have some already.
274 The value `never' means do not make them."
284 "When cleaning directory, number of versions to keep."
290 "If t, delete excess backup versions silently.
291 If nil, ask confirmation. Any other value prevents any trimming."
298 "Number of oldest versions to keep when a new numbered backup is made."
304 "Number of newest versions to keep when a new numbered backup is made.
305 Includes the new backup. Must be > 0"
311 "Whether to add a newline automatically at the end of the file.
313 A value of t means do this only when the file is about to be saved.
314 A value of `visit' means do this right after the file is visited.
315 A value of `visit-save' means do it at both of those times.
316 Any other non-nil value means ask user whether to add a newline, when saving.
317 A value of nil means don't add newlines.
319 Certain major modes set this locally to the value obtained
320 from `mode-require-final-newline'."
329 "Whether to add a newline at end of file, in certain major modes.
330 Those modes set `require-final-newline' to this value when you enable them.
331 They do so because they are often used for files that are supposed
332 to end in newlines, and the question is how to arrange that.
334 A value of t means do this only when the file is about to be saved.
335 A value of `visit' means do this right after the file is visited.
336 A value of `visit-save' means do it at both of those times.
337 Any other non-nil value means ask user whether to add a newline, when saving.
339 A value of nil means do not add newlines. That is a risky choice in this
340 variable since this value is used for modes for files that ought to have
341 final newlines. So if you set this to nil, you must explicitly check and
342 add a final newline, whenever you save a file that really needs one."
352 "Non-nil says by default do auto-saving of every file-visiting buffer."
358 ;; Don't put "\\2" inside expand-file-name, since it will be
359 ;; transformed to "/2" on DOS/Windows.
361 "Transforms to apply to buffer file name before making auto-save file name.
362 Each transform is a list (REGEXP REPLACEMENT UNIQUIFY):
363 REGEXP is a regular expression to match against the file name.
364 If it matches, `replace-match' is used to replace the
365 matching part with REPLACEMENT.
366 If the optional element UNIQUIFY is non-nil, the auto-save file name is
367 constructed by taking the directory part of the replaced file-name,
368 concatenated with the buffer file name with all directory separators
369 changed to `!' to prevent clashes. This will not work
370 correctly if your filesystem truncates the resulting name.
372 All the transforms in the list are tried, in the order they are listed.
373 When one transform applies, its result is final;
374 no further transforms are tried.
376 The default value is set up to put the auto-save file into the
377 temporary directory (see the variable `temporary-file-directory') for
378 editing a remote file.
380 On MS-DOS filesystems without long names this variable is always
381 ignored."
389 "Non-nil means save word abbrevs too when files are saved.
390 If `silently', don't ask the user before saving."
395 "Non-nil means allow `find-file' to visit directories.
396 To visit the directory, `find-file' runs `find-directory-functions'."
401 "List of functions to try in sequence to visit a directory.
402 Each function is called with the directory name as the sole argument
403 and should return either a buffer or nil."
407 ;; FIXME: also add a hook for `(thing-at-point 'filename)'
409 "List of functions to try in sequence to get a file name at point.
410 Each function should return either nil or a file name found at the
411 location of point in the current buffer."
415 ;;;It is not useful to make this a local variable.
416 ;;;(put 'find-file-not-found-hooks 'permanent-local t)
418 "List of functions to be called for `find-file' on nonexistent file.
419 These functions are called as soon as the error is detected.
420 Variable `buffer-file-name' is already set up.
425 ;;;It is not useful to make this a local variable.
426 ;;;(put 'find-file-hooks 'permanent-local t)
429 "List of functions to be called after a buffer is loaded from a file.
430 The buffer's local variables (if any) will have been processed before the
431 functions are called."
438 "List of functions to be called before writing out a buffer to a file.
439 If one of them returns non-nil, the file is considered already written
440 and the rest are not called.
441 These hooks are considered to pertain to the visited file.
442 So any buffer-local binding of this variable is discarded if you change
444 change the major mode.
446 This hook is not run if any of the functions in
447 `write-contents-functions' returns non-nil. Both hooks pertain
448 to how to save a buffer to file, for instance, choosing a suitable
449 coding system and setting mode bits. (See Info
450 node `(elisp)Saving Buffers'.) To perform various checks or
461 "List of functions to be called before writing out a buffer to a file.
462 If one of them returns non-nil, the file is considered already written
463 and the rest are not called and neither are the functions in
464 `write-file-functions'.
466 This variable is meant to be used for hooks that pertain to the
467 buffer's contents, not to the particular visited file; thus,
468 `set-visited-file-name' does not clear this variable; but changing the
469 major mode does clear it.
471 For hooks that _do_ pertain to the particular visited file, use
472 `write-file-functions'. Both this variable and
473 `write-file-functions' relate to how a buffer is saved to file.
474 To perform various checks or updates before the buffer is saved,
481 "Control use of local variables in files you visit.
482 The value can be t, nil, :safe, :all, or something else.
484 A value of t means file local variables specifications are obeyed
485 if all the specified variable values are safe; if any values are
486 not safe, Emacs queries you, once, whether to set them all.
487 \(When you say yes to certain values, they are remembered as safe.)
489 :safe means set the safe variables, and ignore the rest.
490 :all means set all variables, whether safe or not.
491 (Don't set it permanently to :all.)
492 A value of nil means always ignore the file local variables.
494 Any other value means always query you once whether to set them all.
495 \(When you say yes to certain values, they are remembered as safe, but
498 This variable also controls use of major modes specified in
499 a -*- line.
502 always obeys file local variable specifications and the -*- line,
503 and ignores this variable."
504 :risky t
513 "Like `enable-local-variables' but meant for buffer-local bindings.
514 The meaningful values are nil and non-nil. The default is non-nil.
515 If a major mode sets this to nil, buffer-locally, then any local
516 variables list in the file will be ignored.
518 This variable does not affect the use of major modes
523 The value can be t, nil or something else.
524 A value of t means obey `eval' variables.
525 A value of nil means ignore them; anything else means query."
526 :risky t
532 ;; Avoid losing in versions where CLASH_DETECTION is disabled.
541 "Non-nil means buffers visiting files read-only do so in view mode.
542 In fact, this means that all read-only buffers normally have
543 View mode enabled, including buffers that are read-only because
544 you visit a file you cannot alter, and buffers you make read-only
550 "History list of file names entered in the minibuffer.
552 Maximum length of the history list is determined by the value
554 \f
557 "Provides support for ange-ftp host name completion.
558 Runs the usual ange-ftp hook, but only for completion operations."
559 ;; Having this here avoids the need to load ange-ftp when it's not
560 ;; really in use.
566 inhibit-file-name-handlers)))
574 "Convert a standard file's name to something suitable for the OS.
575 This means to guarantee valid names and perhaps to canonicalize
576 certain patterns.
578 FILENAME should be an absolute file name since the conversion rules
579 sometimes vary depending on the position in the file name. E.g. c:/foo
580 is a valid DOS file name, but c:/bar/c:/foo is not.
582 This function's standard definition is trivial; it just returns
583 the argument. However, on Windows and DOS, replace invalid
584 characters. On DOS, make sure to obey the 8.3 limitations.
585 In the native Windows build, turn Cygwin names into native names,
586 and also turn slashes into backslashes if the shell requires it (see
587 `w32-shell-dos-semantics').
589 See Info node `(elisp)Standard File Names' for more details."
594 ;; Replace invalid filename characters with !
598 name))
606 "Read directory name, prompting with PROMPT and completing in directory DIR.
607 Value is not expanded---you must call `expand-file-name' yourself.
608 Default name to DEFAULT-DIRNAME if user exits with the same
609 non-empty string that was inserted by this function.
610 (If DEFAULT-DIRNAME is omitted, DIR combined with INITIAL is used,
611 or just DIR if INITIAL is nil.)
612 If the user exits with an empty minibuffer, this function returns
613 an empty string. (This can only happen if the user erased the
614 pre-inserted contents or if `insert-default-directory' is nil.)
615 Fourth arg MUSTMATCH non-nil means require existing directory's name.
616 Non-nil and non-t means also require confirmation after completion.
617 Fifth arg INITIAL specifies text to start with.
618 DIR should be an absolute directory name. It defaults to
619 the value of `default-directory'."
624 dir))
625 mustmatch initial
628 \f
630 "Show the current default directory."
635 "Value of the CDPATH environment variable, as a list.
639 "Explode a search path into a list of directory names.
640 Directories are separated by occurrences of `path-separator'
641 \(which is colon in GNU and GNU-like systems)."
642 ;; We could use split-string here.
650 nil
655 cd-list)))
658 "Change current directory to given absolute file name DIR."
659 ;; Put the name into directory syntax now,
660 ;; because otherwise expand-file-name may give some bad results.
662 ;; We used to additionally call abbreviate-file-name here, for an
663 ;; unknown reason. Problem is that most buffers are setup
664 ;; without going through cd-absolute and don't call
665 ;; abbreviate-file-name on their default-directory, so the few that
666 ;; do end up using a superficially different directory.
678 "Make DIR become the current buffer's default directory.
679 If your environment includes a `CDPATH' variable, try each one of
680 that list of directories (separated by occurrences of
681 `path-separator') when resolving a relative directory name.
682 The path separator is colon in GNU and GNU-like systems."
685 ;; FIXME: There's a subtle bug in the completion below. Seems linked
686 ;; to a fundamental difficulty of implementing `predicate' correctly.
687 ;; The manifestation is that TAB may list non-directories in the case where
688 ;; those files also correspond to valid directories (if your cd-path is (A/
689 ;; B/) and you have A/a a file and B/a a directory, then both `a' and `a/'
690 ;; will be listed as valid completions).
691 ;; This is because `a' (listed because of A/a) is indeed a valid choice
692 ;; (which will lead to the use of B/a).
697 cd-path nil))
706 default-directory default-directory
707 t))))
717 "Load the Lisp file named FILE."
718 ;; This is a case where .elc makes a lot of sense.
725 "Search for FILENAME through PATH.
726 If found, return the absolute file name of FILENAME, with its suffixes;
727 otherwise return nil.
728 PATH should be a list of directories to look in, like the lists in
729 `exec-path' or `load-path'.
730 If SUFFIXES is non-nil, it should be a list of suffixes to append to
733 If non-nil, PREDICATE is used instead of `file-readable-p'.
735 This function will normally skip directories, so if you want it to find
736 directories, make sure the PREDICATE function returns `dir-ok' for them.
738 PREDICATE can also be an integer to pass to the `access' system call,
739 in which case file-name handlers are ignored. This usage is deprecated.
740 For compatibility, PREDICATE can also be one of the symbols
741 `executable', `readable', `writable', or `exists', or a list of
742 one or more of those symbols."
753 "Do completion for file names passed to `locate-file'."
756 ;; FIXME: maybe we should use completion-file-name-table instead,
757 ;; tho at least for `load', the arg is passed through
758 ;; substitute-in-file-name for historical reasons.
768 ;; If we have files like "foo.el" and "foo.elc", we could load one of
769 ;; them with "foo.el", "foo.elc", or "foo", where just "foo" is the
770 ;; preferred way. So if we list all 3, that gives a lot of redundant
771 ;; entries for the poor soul looking just for "foo". OTOH, sometimes
772 ;; the user does want to pay attention to the extension. We try to
773 ;; diffuse this tension by stripping the suffix, except when the
774 ;; result is a single element (i.e. usually we only list "foo" unless
775 ;; it's the only remaining element in the list, in which case we do
776 ;; list "foo", "foo.elc" and "foo.el").
787 string-file dir))
792 ;; Switching from names to names+fullnames creates a non-monotonicity
793 ;; which can cause problems with things like partial-completion.
794 ;; To minimize the problem, filter out completion-regexp-list, so that
795 ;; M-x load-library RET t/x.e TAB finds some files. Also remove elements
796 ;; from `names' which only matched `string' when they still had
797 ;; their suffix.
799 ;; Remove duplicates of the first element, so that we can easily check
800 ;; if `names' really only contains a single element.
803 ;; There's no more than one matching non-suffixed element, so expand
804 ;; the list by adding the suffixed elements as well.
807 string-dir names string-file pred action)))))
810 "Do completion for file names passed to `locate-file'.
811 PATH-AND-SUFFIXES is a pair of lists, (DIRECTORIES . SUFFIXES)."
814 string nil action))
819 "Regexp of directory names which stop the search in `locate-dominating-file'.
820 Any directory whose name matches this regexp will be treated like
821 a kind of root directory by `locate-dominating-file' which will stop its search
822 when it bumps into it.
823 The default regexp prevents fruitless and time-consuming attempts to find
824 special files in directories in which filenames are interpreted as hostnames,
827 ;; (defun locate-dominating-files (file regexp)
828 ;; "Look up the directory hierarchy from FILE for a file matching REGEXP.
829 ;; Stop at the first parent where a matching file is found and return the list
830 ;; of files that that match in this directory."
831 ;; (catch 'found
832 ;; ;; `user' is not initialized yet because `file' may not exist, so we may
833 ;; ;; have to walk up part of the hierarchy before we find the "initial UID".
834 ;; (let ((user nil)
835 ;; ;; Abbreviate, so as to stop when we cross ~/.
836 ;; (dir (abbreviate-file-name (file-name-as-directory file)))
837 ;; files)
838 ;; (while (and dir
839 ;; ;; As a heuristic, we stop looking up the hierarchy of
840 ;; ;; directories as soon as we find a directory belonging to
841 ;; ;; another user. This should save us from looking in
842 ;; ;; things like /net and /afs. This assumes that all the
843 ;; ;; files inside a project belong to the same user.
844 ;; (let ((prev-user user))
845 ;; (setq user (nth 2 (file-attributes dir)))
846 ;; (or (null prev-user) (equal user prev-user))))
847 ;; (if (setq files (condition-case nil
848 ;; (directory-files dir 'full regexp 'nosort)
849 ;; (error nil)))
850 ;; (throw 'found files)
851 ;; (if (equal dir
852 ;; (setq dir (file-name-directory
853 ;; (directory-file-name dir))))
854 ;; (setq dir nil))))
855 ;; nil)))
858 "Look up the directory hierarchy from FILE for a file named NAME.
859 Stop at the first parent directory containing a file NAME,
860 and return the directory. Return nil if not found."
861 ;; We used to use the above locate-dominating-files code, but the
862 ;; directory-files call is very costly, so we're much better off doing
863 ;; multiple calls using the code in here.
864 ;;
865 ;; Represent /home/luser/foo as ~/foo so that we don't try to look for
866 ;; `name' in /home or in /.
869 ;; `user' is not initialized outside the loop because
870 ;; `file' may not exist, so we may have to walk up part of the
871 ;; hierarchy before we find the "initial UID". Note: currently unused
872 ;; (user nil)
873 try)
876 ;; FIXME: Disabled this heuristic because it is sometimes
877 ;; inappropriate.
878 ;; As a heuristic, we stop looking up the hierarchy of
879 ;; directories as soon as we find a directory belonging
880 ;; to another user. This should save us from looking in
881 ;; things like /net and /afs. This assumes that all the
882 ;; files inside a project belong to the same user.
883 ;; (let ((prev-user user))
884 ;; (setq user (nth 2 (file-attributes file)))
885 ;; (and prev-user (not (equal user prev-user))))
892 root))
896 "Search for COMMAND in `exec-path' and return the absolute file name.
897 Return nil if COMMAND is not found anywhere in `exec-path'."
898 ;; Use 1 rather than file-executable-p to better match the behavior of
899 ;; call-process.
903 "Load the Emacs Lisp library named LIBRARY.
904 This is an interface to the function `load'. LIBRARY is searched
905 for in `load-path', both with and without `load-suffixes' (as
906 well as `load-file-rep-suffixes').
908 See Info node `(emacs)Lisp Libraries' for more details.
909 See `load-file' for a different interface to `load'."
913 load-path
918 "Test whether FILE specifies a location on a remote system.
919 Returns nil or a string identifying the remote connection (ideally
920 a prefix of FILE). For example, the remote identification for filename
923 less reliable than accessing local files.
924 Furthermore, relative file names do not work across remote connections.
926 IDENTIFICATION specifies which part of the identification shall
927 be returned as string. IDENTIFICATION can be the symbol
928 `method', `user', `host' or `localname'; any other value is
929 handled like nil and means to return the complete identification
930 string.
932 If CONNECTED is non-nil, the function returns an identification only
933 if FILE is located on a remote system, and a connection is established
934 to that remote system.
936 `file-remote-p' will never open a connection on its own."
940 nil)))
943 "Whether to use the remote file-name cache for read access.
945 When `nil', always use the cached values.
946 When `t', never use them.
947 A number means use them for that amount of seconds since they were
948 cached.
950 File attributes of remote files are cached for better performance.
951 If they are changed out of Emacs' control, the cached values
952 become invalid, and must be invalidated.
954 In case a remote file is checked regularly, it might be
955 reasonable to let-bind this variable to a value less then the
956 time period between two checks.
957 Example:
959 (defun display-time-file-nonempty-p (file)
960 (let ((remote-file-name-inhibit-cache (- display-time-interval 5)))
961 (and (file-exists-p file)
962 (< 0 (nth 7 (file-attributes (file-chase-links file)))))))"
973 "Copy the file FILE into a temporary file on this machine.
974 Returns the name of the local copy, or nil, if FILE is directly
975 accessible."
976 ;; This formerly had an optional BUFFER argument that wasn't used by
977 ;; anything.
981 nil)))
984 "Return the truename of FILENAME.
985 If FILENAME is not absolute, first expands it against `default-directory'.
986 The truename of a file name is found by chasing symbolic links
987 both at the level of the file and at the level of the directories
988 containing it, until no links are left at any level.
991 ;; COUNTER and PREV-DIRS are only used in recursive calls.
992 ;; COUNTER can be a cons cell whose car is the count of how many
993 ;; more links to chase before getting an error.
994 ;; PREV-DIRS can be a cons cell whose car is an alist
995 ;; of truenames we've just recently computed.
1009 ;; For speed, remove the ange-ftp completion handler from the list.
1010 ;; We know it's not needed here.
1011 ;; For even more speed, do this only on the outermost call.
1018 ;; andrewi@harlequin.co.uk - none of the following code (except for
1019 ;; invoking the file-name handler) currently applies on Windows
1020 ;; (ie. there are no native symlinks), but there is an issue with
1021 ;; case differences being ignored by the OS, and short "8.3 DOS"
1022 ;; name aliases existing for all files. (The short names are not
1023 ;; reported by directory-files, but can be used to refer to files.)
1024 ;; It seems appropriate for file-truename to resolve these issues in
1025 ;; the most natural way, which on Windows is to call the function
1026 ;; `w32-long-file-name' - this returns the exact name of a file as
1027 ;; it is stored on disk (expanding short name aliases with the full
1028 ;; name in the process).
1031 ;; For file name that has a special handler, call handler.
1032 ;; This is so that ange-ftp can save time by doing a no-op.
1035 ;; If filename contains a wildcard, newname will be the old name.
1037 ;; If filename exists, use the long name. If it doesn't exist,
1038 ;; drill down until we find a directory that exists, and use
1039 ;; the long name of that, with the extra non-existent path
1040 ;; components concatenated.
1042 missing rest)
1045 ;; Include the preceding directory separator in the missing
1046 ;; part so subsequent recursion on the rest works.
1051 ""
1056 ;; If this file directly leads to a link, process that iteratively
1057 ;; so that we don't use lots of stack.
1063 ;; For file name that has a special handler, call handler.
1064 ;; This is so that ange-ftp can save time by doing a no-op.
1067 done t)
1069 target dirfile)
1070 ;; Get the truename of the directory.
1072 ;; If these are equal, we have the (or a) root directory.
1074 ;; If this is the same dir we last got the truename for,
1075 ;; save time--don't recalculate.
1085 done t)
1088 done t)
1089 ;; Put it back on the file name.
1091 ;; Is the file name the name of a link?
1094 ;; Yes => chase that link, then start all over
1095 ;; since the link may point to a directory name that uses links.
1096 ;; We can't safely use expand-file-name here
1097 ;; since target might look like foo/../bar where foo
1098 ;; is itself a link. Instead, we handle . and .. above.
1101 target
1103 done nil)
1104 ;; No, we are done!
1106 filename))
1109 "Chase links in FILENAME until a name that is not a link.
1110 Unlike `file-truename', this does not check whether a parent
1111 directory name is a symbolic link.
1112 If the optional argument LIMIT is a number,
1113 it means chase no more than that many links and then stop."
1121 ;; In the context of a link, `//' doesn't mean what Emacs thinks.
1124 ;; Handle `..' by hand, since it needs to work in the
1125 ;; target of any directory symlink.
1126 ;; This code is not quite complete; it does not handle
1127 ;; embedded .. in some cases such as ./../foo and foo/bar/../../../lose.
1131 ;; Chase links in the default dir of the symlink.
1135 ;; Now find the parent of that dir.
1139 newname))
1141 ;; A handy function to display file sizes in human-readable form.
1142 ;; See http://en.wikipedia.org/wiki/Kibibyte for the reference.
1144 "Produce a string showing FILE-SIZE in human-readable form.
1146 Optional second argument FLAVOR controls the units and the display format:
1148 If FLAVOR is nil or omitted, each kilobyte is 1024 bytes and the produced
1150 If FLAVOR is `si', each kilobyte is 1000 bytes and the produced suffixes
1152 If FLAVOR is `iec', each kilobyte is 1024 bytes and the produced suffixes
1155 1024.0
1158 ;; none, kilo, mega, giga, tera, peta, exa, zetta, yotta
1164 "%.1f%s%s"
1166 file-size
1168 "K"
1173 "Create a temporary file.
1174 The returned file name (created by appending some random characters at the end
1175 of PREFIX, and expanding against `temporary-file-directory' if necessary),
1176 is guaranteed to point to a newly created empty file.
1177 You can then use `write-region' to write new data into the file.
1179 If DIR-FLAG is non-nil, create a new empty directory instead of a file.
1181 If SUFFIX is non-nil, add that at the end of the file name."
1183 file)
1186 ;; Create temp files with strict access rights. It's easy to
1187 ;; loosen them later, whereas it's impossible to close the
1188 ;; time-window of loose permissions otherwise.
1196 temporary-file-directory)
1198 temporary-file-directory))))
1204 nil)
1206 ;; the file was somehow created by someone else between
1207 ;; `make-temp-name' and `write-region', let's try again.
1208 nil)
1209 file)
1210 ;; Reset the umask.
1214 "Change the encoding of FILE's name from CODING to NEW-CODING.
1215 The value is a new name of FILE.
1216 Signals a `file-already-exists' error if a file of the new name
1217 already exists unless optional fourth argument OK-IF-ALREADY-EXISTS
1218 is non-nil. A number as fourth arg means request confirmation if
1219 the new name already exists. This is what happens in interactive
1220 use with M-x."
1223 default-file-name-coding-system))
1225 from-coding to-coding)
1227 ;; We provide the default coding only when it seems that
1228 ;; the filename is correctly decoded by the default
1229 ;; coding.
1235 filename default-coding)
1236 default-coding))
1240 ;; We provide the default coding only when a user is going to
1241 ;; change the encoding not from the default coding.
1245 filename from-coding)))
1248 filename from-coding default-coding)
1249 default-coding)))
1253 default-file-name-coding-system))
1254 ;; FILE should have been decoded by DEFAULT-CODING.
1258 ;; Suppress further encoding.
1263 newname))
1264 \f
1266 "Whether confirmation is requested before visiting a new file or buffer.
1267 If nil, confirmation is not requested.
1268 If the value is `after-completion', confirmation is only
1269 requested if the user called `minibuffer-complete' right before
1270 `minibuffer-complete-and-exit'.
1271 Any other non-nil value means to request confirmation.
1273 This affects commands like `switch-to-buffer' and `find-file'."
1281 "Whether to request confirmation before visiting a new file or buffer.
1282 The variable `confirm-nonexistent-file-or-buffer' determines the
1283 return value, which may be passed as the REQUIRE-MATCH arg to
1284 `read-buffer' or `find-file-read-args'."
1292 "Read the name of a buffer to switch to and return as a string.
1293 It is intended for `switch-to-buffer' family of commands since they
1294 need to omit the name of current buffer from the list of completions
1295 and default values."
1300 ;; Since rbts-completion-table is built dynamically, we
1301 ;; can't just add it to the default value of
1302 ;; icomplete-with-completion-tables, so we add it
1303 ;; here manually.
1308 icomplete-with-completion-tables))))
1313 "Select the buffer specified by BUFFER-OR-NAME in another window.
1314 BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or
1315 nil. Return the buffer switched to.
1317 If called interactively, prompt for the buffer name using the
1318 minibuffer. The variable `confirm-nonexistent-file-or-buffer'
1319 determines whether to request confirmation before creating a new
1320 buffer.
1322 If BUFFER-OR-NAME is a string and does not identify an existing
1323 buffer, create a new buffer with that name. If BUFFER-OR-NAME is
1324 nil, switch to the buffer returned by `other-buffer'.
1326 Optional second argument NORECORD non-nil means do not put this
1327 buffer at the front of the list of recently selected ones.
1329 This uses the function `display-buffer' as a subroutine; see its
1330 documentation for additional customization information."
1334 same-window-buffer-names same-window-regexps)
1338 "Switch to buffer BUFFER-OR-NAME in another frame.
1339 BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or
1340 nil. Return the buffer switched to.
1342 If called interactively, prompt for the buffer name using the
1343 minibuffer. The variable `confirm-nonexistent-file-or-buffer'
1344 determines whether to request confirmation before creating a new
1345 buffer.
1347 If BUFFER-OR-NAME is a string and does not identify an existing
1348 buffer, create a new buffer with that name. If BUFFER-OR-NAME is
1349 nil, switch to the buffer returned by `other-buffer'.
1351 Optional second arg NORECORD non-nil means do not put this
1352 buffer at the front of the list of recently selected ones.
1354 This uses the function `display-buffer' as a subroutine; see its
1355 documentation for additional customization information."
1359 same-window-buffer-names same-window-regexps)
1363 "Display buffer BUFFER in another frame.
1364 This uses the function `display-buffer' as a subroutine; see
1365 its documentation for additional customization information."
1368 same-window-buffer-names same-window-regexps
1369 ;;(old-window (selected-window))
1370 new-window)
1372 ;; This may have been here in order to prevent the new frame from hiding
1373 ;; the old frame. But it does more harm than good.
1374 ;; Maybe we should call `raise-window' on the old-frame instead? --Stef
1375 ;;(lower-frame (window-frame new-window))
1377 ;; This may have been here in order to make sure the old-frame gets the
1378 ;; focus. But not only can it cause an annoying flicker, with some
1379 ;; window-managers it just makes the window invisible, with no easy
1380 ;; way to recover it. --Stef
1381 ;;(make-frame-invisible (window-frame old-window))
1382 ;;(make-frame-visible (window-frame old-window))
1383 ))
1386 "Temporarily add FUN to `minibuffer-setup-hook' while executing BODY.
1387 BODY should use the minibuffer at most once.
1388 Recursive uses of the minibuffer are unaffected (FUN is not
1389 called additional times).
1391 This macro actually adds an auxiliary function that calls FUN,
1392 rather than FUN itself, to `minibuffer-setup-hook'."
1398 ;; Clear out this hook so it does not interfere
1399 ;; with any recursive minibuffer usage.
1410 t))
1413 "Edit file FILENAME.
1414 Switch to a buffer visiting file FILENAME,
1415 creating one if none already exists.
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 You can visit files on remote machines by specifying something
1421 like /ssh:SOME_REMOTE_MACHINE:FILE for the file name. You can
1422 also visit local files as a different user by specifying
1423 /sudo::FILE for the file name.
1424 See the Info node `(tramp)Filename Syntax' in the Tramp Info
1425 manual, for more about this.
1427 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1428 expand wildcards (if any) and visit multiple files. You can
1429 suppress wildcard expansion by setting `find-file-wildcards' to nil.
1431 To visit a file without any kind of conversion and without
1442 "Edit file FILENAME, in another window.
1445 an existing one. See the function `display-buffer'.
1447 Interactively, the default if you just type RET is the current directory,
1448 but the visited file name is available through the minibuffer history:
1449 type M-n to pull it into the minibuffer.
1451 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1452 expand wildcards (if any) and visit multiple files."
1465 "Edit file FILENAME, in another frame.
1468 an existing one. See the function `display-buffer'.
1470 Interactively, the default if you just type RET is the current directory,
1471 but the visited file name is available through the minibuffer history:
1472 type M-n to pull it into the minibuffer.
1474 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1475 expand wildcards (if any) and visit multiple files."
1488 "Edit the existing file FILENAME.
1490 file names with wildcards."
1499 "Edit file FILENAME but don't allow changes.
1513 value))
1516 "Edit file FILENAME in another window but don't allow changes.
1530 value))
1533 "Edit file FILENAME in another frame but don't allow changes.
1547 value))
1550 "Find file FILENAME as a replacement for the file in the next window.
1551 This command does not select that window.
1555 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1556 expand wildcards (if any) and replace the file with multiple files."
1567 "Find alternate file: " file-dir nil
1569 t))))
1579 "Find file FILENAME, select its buffer, kill previous buffer.
1580 If the current buffer now contains an empty file that you just visited
1581 \(presumably by mistake), use this command to visit the file you really want.
1585 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1586 expand wildcards (if any) and replace the file with multiple files.
1588 If the current buffer is an indirect buffer, or the base buffer
1589 for one or more indirect buffers, the other buffer(s) are not
1590 killed."
1599 "Find alternate file: " file-dir nil
1601 t)))
1616 ;; Run `kill-buffer-hook' here. It needs to happen before
1617 ;; variables like `buffer-file-name' etc are set to nil below,
1618 ;; because some of the hooks that could be invoked
1619 ;; (e.g., `save-place-to-alist') depend on those variables.
1620 ;;
1621 ;; Note that `kill-buffer-hook' is not what queries whether to
1622 ;; save a modified buffer visiting a file. Rather, `kill-buffer'
1623 ;; asks that itself. Thus, there's no need to temporarily do
1624 ;; `(set-buffer-modified-p nil)' before running this hook.
1626 ;; Okay, now we can end-of-life the old buffer.
1633 ;; This prevents us from finding the same buffer
1634 ;; if we specified the same file again.
1638 ;; Likewise for dired buffers.
1642 ;; This executes if find-file gets an error
1643 ;; and does not really find anything.
1644 ;; We put things back as they were.
1645 ;; If find-file actually finds something, we kill obuf below.
1654 ;; We already ran these; don't run them again.
1657 \f
1659 "Create a suitably named buffer for visiting FILENAME, and return it.
1660 FILENAME (sans directory) is used unchanged if that name is free;
1661 otherwise a string <2> or <3> or ... is appended to get an unused name.
1662 Spaces at the start of FILENAME (sans directory) are removed."
1671 "Create and return a buffer with a name based on NAME.
1672 Choose the buffer's name using `generate-new-buffer-name'."
1676 "Regexp to match the automounter prefix in a directory name."
1684 "Return a version of FILENAME shortened using `directory-abbrev-alist'.
1686 home directory is a root directory) and removes automounter prefixes
1687 \(see the variable `automount-dir-prefix')."
1688 ;; Get rid of the prefixes added by the automounter.
1695 ;; Avoid treating /home/foo as /home/Foo during `~' substitution.
1696 ;; To fix this right, we need a `file-name-case-sensitive-p'
1697 ;; function, but we don't have that yet, so just guess.
1700 ;; If any elt of directory-abbrev-alist matches this name,
1701 ;; abbreviate accordingly.
1707 ;; Compute and save the abbreviated homedir name.
1708 ;; We defer computing this until the first time it's needed, to
1709 ;; give time for directory-abbrev-alist to be set properly.
1710 ;; We include a slash at the end, to avoid spurious matches
1711 ;; such as `/usr/foobar' when the home dir is `/usr/foo'.
1718 ;; If FILENAME starts with the abbreviated homedir,
1719 ;; make it start with `~' instead.
1721 ;; If the home dir is just /, don't change it.
1724 ;; MS-DOS root directories can come with a drive letter;
1725 ;; Novell Netware allows drive letters beyond `Z:'.
1733 filename)))
1736 "List of logical names for which visiting shouldn't save the true dirname."
1741 "Return the buffer visiting file FILENAME (a string).
1742 This is like `get-file-buffer', except that it checks for any buffer
1743 visiting the same file, possibly under a different name.
1744 If PREDICATE is non-nil, only buffers satisfying it are eligible,
1745 and others are ignored.
1746 If there is no such live buffer, return nil."
1759 found)
1769 ;; Verify this buffer's file number
1770 ;; still belongs to its file.
1773 attributes)
1777 found))))
1778 \f
1780 "Non-nil means file-visiting commands should handle wildcards.
1781 For example, if you specify `*.c', that would visit all the files
1782 whose names match the pattern."
1788 "Non-nil means suppress warning messages for symlinked files.
1789 When nil, Emacs prints a warning when visiting a file that is already
1790 visited, but with a different name. Setting this option to t
1791 suppresses this warning."
1797 "Maximum size of file above which a confirmation is requested.
1798 When nil, never request confirmation."
1805 "If file SIZE larger than `large-file-warning-threshold', allow user to abort.
1806 OP-TYPE specifies the file operation being performed (for message to user)."
1815 "Read file FILENAME into a buffer and return the buffer.
1816 If a buffer exists visiting FILENAME, return that one, but
1817 verify that the file has not changed since visited or saved.
1818 The buffer is not selected, just returned to the caller.
1819 Optional second arg NOWARN non-nil means suppress any warning messages.
1820 Optional third arg RAWFILE non-nil means the file is read literally.
1821 Optional fourth arg WILDCARDS non-nil means do wildcard processing
1822 and visit all the matching files. When wildcards are actually
1823 used and expanded, return a list of buffers that are visiting
1824 the various files."
1831 'find-directory-functions
1834 filename)))
1837 find-file-wildcards
1851 ;; Find any buffer for a file which has same truename.
1853 ;; Let user know if there is a buffer with the same truename.
1857 find-file-suppress-same-file-warnings
1861 ;; Optionally also find that buffer.
1864 ;; Check to see if the file looks uncommonly large.
1868 ;; We are using an existing buffer.
1875 ;; Certain files should be reverted automatically
1876 ;; if they have changed on disk and not in the buffer.
1884 found))
1894 "File %s changed on disk. Discard your edits? "
1899 "File %s changed on disk. Discard your edits in %s? "
1907 ;; Check if a formerly read-only file has become
1908 ;; writable and vice versa, but if the buffer agrees
1909 ;; with the new state of the file, that is ok too.
1917 buffer-file-name
1926 ;; It is confusing to ask whether to visit
1927 ;; non-literally if they have the file in
1928 ;; hexl-mode or image-mode.
1934 "The file %s is already visited normally,
1935 and you have edited the buffer. Now you have asked to visit it literally,
1936 meaning no coding system handling, format conversion, or local variables.
1937 Emacs can only visit a file in one way at a time.
1939 Do you want to save the file, and visit it literally instead? "
1940 "The file %s is already visited literally,
1941 meaning no coding system handling, format conversion, or local variables.
1942 You have edited the buffer. Now you have asked to visit the file normally,
1943 but Emacs can only visit a file in one way at a time.
1950 rawfile truename number))
1954 "\
1955 Do you want to discard your changes, and visit the file literally now? "
1956 "\
1959 rawfile truename number)
1965 "The file %s is already visited normally.
1966 You have asked to visit it literally,
1967 meaning no coding system decoding, format conversion, or local variables.
1968 But Emacs can only visit a file in one way at a time.
1970 Do you want to revisit the file literally now? "
1971 "The file %s is already visited literally,
1972 meaning no coding system decoding, format conversion, or local variables.
1973 You have asked to visit it normally,
1974 but Emacs can only visit a file in one way at a time.
1979 rawfile truename number)
1982 ;; Return the buffer we are using.
1983 buf)
1984 ;; Create a new buffer.
1986 ;; find-file-noselect-1 may use a different buffer.
1988 rawfile truename number))))))
1994 ;; Needed in case we are re-visiting the file with a different
1995 ;; text representation.
2012 filename)))
2013 ;; Unconditionally set error
2023 filename)))
2024 ;; Run find-file-not-found-functions until one returns non-nil.
2026 ;; If they fail too, set error.
2028 ;; Record the file's truename, and maybe use that as visited name.
2036 ;; Set buffer's default directory to that of the file.
2038 ;; Turn off backup files for certain file names. Since
2039 ;; this is a permanent local, the major mode won't eliminate it.
2054 \f
2056 "Like `insert-file-contents', but only reads in the file literally.
2057 A buffer may be modified in several ways after reading into the buffer,
2058 to Emacs features such as format decoding, character code
2059 conversion, `find-file-hook', automatic uncompression, etc.
2061 This function ensures that none of these modifications will take place."
2069 nil))
2072 inhibit-file-name-handlers))
2085 filename)))
2086 ;; Check whether the file is uncommonly large
2097 "Insert contents of file FILENAME into buffer after point with no conversion.
2099 This function is meant for the user to run interactively.
2100 Don't call it from programs! Use `insert-file-contents-literally' instead.
2101 \(Its calling sequence is different; see its documentation)."
2106 "Non-nil if this buffer was made by `find-file-literally' or equivalent.
2107 This has the `permanent-local' property, which takes effect if you
2112 "Visit file FILENAME with no conversion of any kind.
2113 Format conversion and character code conversion are both disabled,
2114 and multibyte characters are disabled in the resulting buffer.
2115 The major mode used is Fundamental mode regardless of the file name,
2116 and local variable specifications in the file are ignored.
2117 Automatic uncompression and adding a newline at the end of the
2118 file due to `require-final-newline' is also disabled.
2120 You cannot absolutely rely on this function to result in
2121 visiting the file literally. If Emacs already has a buffer
2122 which is visiting the file, you get the existing buffer,
2123 regardless of whether it was created literally or not.
2125 In a Lisp program, if you want to be sure of accessing a file's
2126 contents literally, you should create a temporary buffer and then read
2127 the file contents into it using `insert-file-contents-literally'."
2130 "Find file literally: " nil default-directory
2133 \f
2135 _after-find-file-from-revert-buffer
2136 nomodes)
2137 "Called after finding a file and by the default revert function.
2138 Sets buffer mode, parses local variables.
2139 Optional args ERROR, WARN, and NOAUTO: ERROR non-nil means there was an
2140 error in reading the file. WARN non-nil means warn if there
2141 exists an auto-save file more recent than the visited file.
2142 NOAUTO means don't mess with auto-save mode.
2143 Fourth arg AFTER-FIND-FILE-FROM-REVERT-BUFFER is ignored
2144 \(see `revert-buffer-in-progress-p' for similar functionality).
2145 Fifth arg NOMODES non-nil means don't alter the file's modes.
2146 Finishes by calling the functions in `find-file-hook'
2147 unless NOMODES is non-nil."
2150 nil
2160 ;; No need to warn if buffer is auto-saved
2161 ;; under the name of the visited file.
2163 auto-save-visited-file-name))
2166 buffer-file-name))
2186 ;; Make people do a little extra work (C-x C-q)
2187 ;; before altering a backup file.
2190 ;; When a file is marked read-only,
2191 ;; make the buffer read-only even if root is looking at it.
2199 ;; If requested, add a newline at the end of the file.
2209 view-read-only
2215 "Eval BODY and turn any error into a FORMAT message.
2216 FORMAT can have a %s escape which will be replaced with the actual error.
2217 If `debug-on-error' is set, errors are not caught, so that you can
2218 debug them.
2219 Avoid using a large BODY since it is duplicated."
2228 "Choose the major mode for this buffer automatically.
2229 Also sets up any specified local variables of the file.
2230 Uses the visited file name, the -*- line, and the local variables spec.
2232 This function is called automatically from `find-file'. In that case,
2233 we may set up the file-specified mode and local variables,
2234 depending on the value of `enable-local-variables'.
2235 In addition, if `local-enable-local-variables' is nil, we do
2236 not set local variables (though we do notice a mode specified with -*-.)
2238 `enable-local-variables' is ignored if you run `normal-mode' interactively,
2239 or from Lisp without specifying the optional argument FIND-FILE;
2240 in that case, this function acts as if `enable-local-variables' were t."
2248 ;; Turn font lock off and on, to make sure it takes account of
2249 ;; whatever file local variables are relevant to it.
2251 ;; Font-lock-mode (now in font-core.el) can be ON when
2252 ;; font-lock.el still hasn't been loaded.
2262 "Non-nil means to try second pass through `auto-mode-alist'.
2263 This means that if the first case-sensitive search through the alist fails
2264 to find a matching major mode, a second case-insensitive search is made.
2265 On systems with case-insensitive file names, this variable is ignored,
2266 since only a single case-insensitive search through the alist is made."
2272 ;; Note: The entries for the modes defined in cc-mode.el (c-mode,
2273 ;; c++-mode, java-mode and more) are added through autoload
2274 ;; directives in that file. That way is discouraged since it
2275 ;; spreads out the definition of the initial value.
2319 ;; Less common extensions come here
2320 ;; so more common ones above are found faster.
2328 ;; Besides .gdbinit, gdb documents other names to be usable for init
2329 ;; files, cross-debuggers can use something like
2330 ;; .PROCESSORNAME-gdbinit so that the host and target gdbinit files
2331 ;; don't interfere with each other.
2369 ;; The list of archive file extensions should be in sync with
2370 ;; `auto-coding-alist' with `no-conversion' coding system.
2376 ;; Mailer puts message to be edited in
2377 ;; /tmp/Re.... or Message
2380 ;; some news reader is reported to use this
2391 ;; .emacs or .gnus or .viper following a directory delimiter in
2392 ;; Unix, MSDOG or VMS syntax.
2395 ;; _emacs following a directory delimiter
2396 ;; in MsDos syntax
2400 ;; Linux-2.6.9 uses some different suffix for linker scripts:
2401 ;; "ld", "lds", "lds.S", "lds.in", "ld.script", and "ld.script.balo".
2402 ;; eCos uses "ld" and "ldi". Netbsd uses "ldscript.*".
2405 ;; .xs is also used for ld scripts, but seems to be more commonly
2406 ;; associated with Perl .xs files (C with Perl bindings). (Bug#7071)
2408 ;; Explained in binutils ld/genscripts.sh. Eg:
2409 ;; A .x script file is the default script.
2410 ;; A .xr script is for linking without relocation (-r flag). Etc.
2414 ;; Common Lisp ASDF package system.
2421 ("\\.\\(?:PDF\\|DVI\\|OD[FGPST]\\|DOCX?\\|XLSX?\\|PPTX?\\|pdf\\|dvi\\|od[fgpst]\\|docx?\\|xlsx?\\|pptx?\\)\\'" . doc-view-mode-maybe)
2432 ;; Windows candidates may be opened case sensitively on Unix
2438 ;; *.cf, *.cfg, *.conf, *.config[.local|.de_DE.UTF8|...], */config
2440 ("\\`/etc/\\(?:DIR_COLORS\\|ethers\\|.?fstab\\|.*hosts\\|lesskey\\|login\\.?de\\(?:fs\\|vperm\\)\\|magic\\|mtab\\|pam\\.d/.*\\|permissions\\(?:\\.d/.+\\)?\\|protocols\\|rpc\\|services\\)\\'" . conf-space-mode)
2441 ("\\`/etc/\\(?:acpid?/.+\\|aliases\\(?:\\.d/.+\\)?\\|default/.+\\|group-?\\|hosts\\..+\\|inittab\\|ksysguarddrc\\|opera6rc\\|passwd-?\\|shadow-?\\|sysconfig/.+\\)\\'" . conf-mode)
2442 ;; ChangeLog.old etc. Other change-log-mode entries are above;
2443 ;; this has lower priority to avoid matching changelog.sgml etc.
2445 ;; either user's dot-files or under /etc or some such
2447 ;; alas not all ~/.*rc files are like this
2448 ("/\\.\\(?:enigma\\|gltron\\|gtk\\|hxplayer\\|net\\|neverball\\|qt/.+\\|realplayer\\|scummvm\\|sversion\\|sylpheed/.+\\|xmp\\)rc\\'" . conf-mode)
2453 ;; this contains everything twice, with space and with colon :-(
2455 ;; Get rid of any trailing .n.m and try again.
2456 ;; This is for files saved by cvs-merge that look like .#<file>.<rev>
2457 ;; or .#<file>.<rev>-<rev> or VC's <file>.~<rev>~.
2458 ;; Using mode nil rather than `ignore' would let the search continue
2459 ;; through this list (with the shortened name) rather than start over.
2461 ;; The following should come after the ChangeLog pattern
2462 ;; for the sake of ChangeLog.1, etc.
2463 ;; and after the .scm.[0-9] and CVS' <file>.<rev> patterns too.
2466 "Alist of filename patterns vs corresponding major mode functions.
2467 Each element looks like (REGEXP . FUNCTION) or (REGEXP FUNCTION NON-NIL).
2468 \(NON-NIL stands for anything that is not nil; the value does not matter.)
2469 Visiting a file whose name matches REGEXP specifies FUNCTION as the
2470 mode function to use. FUNCTION will be called, unless it is nil.
2472 If the element has the form (REGEXP FUNCTION NON-NIL), then after
2473 calling FUNCTION (if it's not nil), we delete the suffix that matched
2474 REGEXP and search the list again for another match.
2476 If the file name matches `inhibit-first-line-modes-regexps',
2477 then `auto-mode-alist' is not processed.
2479 The extensions whose FUNCTION is `archive-mode' should also
2480 appear in `auto-coding-alist' with `no-conversion' coding system.
2482 See also `interpreter-mode-alist', which detects executable script modes
2483 based on the interpreters they specify to run,
2488 "Select Conf mode or XML mode according to start of file."
2498 ;; Note: The entries for the modes defined in cc-mode.el (awk-mode
2499 ;; and pike-mode) are added through autoload directives in that
2500 ;; file. That way is discouraged since it spreads out the
2501 ;; definition of the initial value.
2540 "Alist mapping interpreter names to major modes.
2541 This is used for files whose first lines match `auto-mode-interpreter-regexp'.
2542 Each element looks like (INTERPRETER . MODE).
2543 If INTERPRETER matches the name of the interpreter specified in the first line
2544 of a script, mode MODE is enabled.
2552 "List of regexps for what to ignore, for `inhibit-first-line-modes-regexps'.
2553 When checking `inhibit-first-line-modes-regexps', we first discard
2559 "Regexp matching interpreters, for file mode determination.
2560 This regular expression is matched against the first line of a file
2561 to determine the file's mode in `set-auto-mode'. If it matches, the file
2562 is assumed to be interpreted by the interpreter matched by the second group
2563 of the regular expression. The mode is then determined as the mode
2567 "Alist of buffer beginnings vs. corresponding major mode functions.
2568 Each element looks like (REGEXP . FUNCTION) or (MATCH-FUNCTION . FUNCTION).
2569 After visiting a file, if REGEXP matches the text at the beginning of the
2570 buffer, or calling MATCH-FUNCTION returns non-nil, `normal-mode' will
2571 call FUNCTION rather than allowing `auto-mode-alist' to decide the buffer's
2572 major mode.
2574 If FUNCTION is nil, then it is not called. (That is a way of saying
2582 ;; The < comes before the groups (but the first) to reduce backtracking.
2583 ;; TODO: UTF-16 <?xml may be preceded by a BOM 0xff 0xfe or 0xfe 0xff.
2584 ;; We use [ \t\r\n] instead of `\\s ' to make regex overflow less likely.
2588 comment-re "*"
2591 . html-mode)
2593 ;; These two must come after html, because they are more general:
2598 . sgml-mode)
2601 "Like `magic-mode-alist' but has lower priority than `auto-mode-alist'.
2602 Each element looks like (REGEXP . FUNCTION) or (MATCH-FUNCTION . FUNCTION).
2603 After visiting a file, if REGEXP matches the text at the beginning of the
2604 buffer, or calling MATCH-FUNCTION returns non-nil, `normal-mode' will
2605 call FUNCTION, provided that `magic-mode-alist' and `auto-mode-alist'
2606 have not specified a mode for this file.
2612 "Upper limit on `magic-mode-alist' regexp matches.
2616 "Select major mode appropriate for current buffer.
2618 To find the right major mode, this function checks for a -*- mode tag,
2619 checks if it uses an interpreter listed in `interpreter-mode-alist',
2620 matches the buffer beginning against `magic-mode-alist',
2621 compares the filename against the entries in `auto-mode-alist',
2622 then matches the buffer beginning against `magic-fallback-mode-alist'.
2624 It does not check for the `mode:' local variable in the
2625 Local Variables section of the file; for that, use `hack-local-variables'.
2627 If `enable-local-variables' is nil, this function does not check for a
2628 -*- mode tag.
2630 If the optional argument KEEP-MODE-IF-SAME is non-nil, then we
2631 set the major mode only if that would change it. In other words
2632 we don't actually set it to the same mode the buffer already has."
2633 ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*-
2635 ;; Find a -*- mode tag
2642 ;; Find all specifications for the `mode:' variable
2643 ;; and execute them left to right.
2655 modes)))
2656 ;; Simple -*-MODE-*- case.
2659 modes))))
2660 ;; If we found modes to use, invoke them now, outside the save-excursion.
2668 ;; continuing would call minor modes again, toggling them off
2670 ;; If we didn't, look for an interpreter specified in the first line.
2671 ;; As a special case, allow for things like "#!/bin/env perl", which
2672 ;; finds the interpreter anywhere in $PATH.
2679 ;; Map interpreter name to a mode, signalling we're done at the
2680 ;; same time.
2682 interpreter-mode-alist))
2683 ;; If we found an interpreter mode to use, invoke it now.
2686 ;; Next try matching the buffer beginning against magic-mode-alist.
2700 ;; Next compare the filename against the entries in auto-mode-alist.
2705 ;; Remove remote file name identification.
2709 ;; Remove backup-suffixes from file name.
2712 ;; Find first matching alist entry.
2715 ;; System is case-insensitive.
2719 ;; System is case-sensitive.
2721 ;; First match case-sensitively.
2725 ;; Fallback to case-insensitive match.
2739 ;; Next try matching the buffer beginning against magic-fallback-mode-alist.
2754 ;; When `keep-mode-if-same' is set, we are working on behalf of
2755 ;; set-visited-file-name. In that case, if the major mode specified is the
2756 ;; same one we already have, don't actually reset it. We don't want to lose
2757 ;; minor modes such as Font Lock.
2759 "Apply MODE and return it.
2760 If optional arg KEEP-MODE-IF-SAME is non-nil, MODE is chased of
2761 any aliases and compared to current major mode. If they are the
2762 same, do nothing and return nil."
2768 mode)))
2771 "Find the -*- spec in the buffer.
2772 Call with point at the place to start searching from.
2773 If one is found, set point to the beginning
2774 and return the position of the end.
2775 Otherwise, return nil; point may be changed."
2778 ;; Don't look for -*- if this file name matches any
2779 ;; of the regexps in inhibit-first-line-modes-regexps.
2787 sufs)
2795 ;; If the file begins with "#!"
2796 ;; (exec interpreter magic), look
2797 ;; for mode frobs in the first two
2798 ;; lines. You cannot necessarily
2799 ;; put them in the first line of
2800 ;; such a file without screwing up
2801 ;; the interpreter invocation.
2802 ;; The same holds for
2803 ;; '\"
2804 ;; in man pages (preprocessor
2805 ;; magic for the `man' program).
2816 end))))
2817 \f
2818 ;;; Handling file local variables
2822 file-local-variables-alist dir-local-variables-alist)
2827 "Normal hook run after processing a file's local variables specs.
2828 Major modes can use this to examine user-specified local variables
2832 "List variable-value pairs that are considered safe.
2833 Each element is a cons cell (VAR . VAL), where VAR is a variable
2834 symbol and VAL is a value that is considered safe."
2835 :risky t
2840 ;; This should be here at least as long as Emacs supports write-file-hooks.
2844 "Expressions that are considered safe in an `eval:' local variable.
2845 Add expressions to this list if you want Emacs to evaluate them, when
2846 they appear in an `eval' local variable specification, without first
2847 asking you for confirmation."
2848 :risky t
2853 ;; Risky local variables:
2856 buffer-auto-save-file-name
2857 buffer-file-name
2858 buffer-file-truename
2859 buffer-undo-list
2860 debugger
2861 default-text-properties
2862 eval
2863 exec-directory
2864 exec-path
2865 file-name-handler-alist
2866 frame-title-format
2867 global-mode-string
2868 header-line-format
2869 icon-title-format
2870 inhibit-quit
2871 load-path
2872 max-lisp-eval-depth
2873 max-specpdl-size
2874 minor-mode-map-alist
2875 minor-mode-overriding-map-alist
2876 mode-line-format
2877 mode-name
2878 overriding-local-map
2879 overriding-terminal-local-map
2880 process-environment
2881 standard-input
2882 standard-output
2883 unread-command-events))
2885 ;; Safe local variables:
2886 ;;
2887 ;; For variables defined by major modes, the safety declarations can go into
2888 ;; the major mode's file, since that will be loaded before file variables are
2889 ;; processed.
2890 ;;
2891 ;; For variables defined by minor modes, put the safety declarations in the
2892 ;; file defining the minor mode after the defcustom/defvar using an autoload
2893 ;; cookie, e.g.:
2894 ;;
2895 ;; ;;;###autoload(put 'variable 'safe-local-variable 'stringp)
2896 ;;
2897 ;; Otherwise, when Emacs visits a file specifying that local variable, the
2898 ;; minor mode file may not be loaded yet.
2899 ;;
2900 ;; For variables defined in the C source code the declaration should go here:
2922 "Alist of file-local variable settings in the current buffer.
2923 Each element in this list has the form (VAR . VALUE), where VAR
2924 is a file-local variable (a symbol) and VALUE is the value
2925 specified. The actual value in the buffer may differ from VALUE,
2931 "Alist of directory-local variable settings in the current buffer.
2932 Each element in this list has the form (VAR . VALUE), where VAR
2933 is a directory-local variable (a symbol) and VALUE is the value
2934 specified in .dir-locals.el. The actual value in the buffer
2935 may differ from VALUE, if it is changed by the major or minor modes,
2940 "Normal hook run before setting file-local variables.
2941 It is called after checking for unsafe/risky variables and
2942 setting `file-local-variables-alist', and before applying the
2943 variables stored in `file-local-variables-alist'. A hook
2944 function is allowed to change the contents of this alist.
2946 This hook is called only if there is at least one file-local
2950 "Get confirmation before setting up local variable values.
2951 ALL-VARS is the list of all variables to be set up.
2952 UNSAFE-VARS is the list of those that aren't marked as safe or risky.
2953 RISKY-VARS is the list of those that are marked as risky.
2954 If these settings come from directory-local variables, then
2955 DIR-NAME is the name of the associated directory. Otherwise it is nil."
2957 nil
2964 unsafe-vars))
2968 prompt char)
2976 ", and variables that are risky (**)."
2984 y -- to apply the local variables list.
2988 ! -- to apply the local variables list, and permanently mark these
3000 ;; Make strings with embedded whitespace easier to read.
3008 ""
3023 ;; When this is called from desktop-restore-file-buffer,
3024 ;; coding-system-for-read may be non-nil. Reset it before
3025 ;; writing to .emacs.
3029 'safe-local-variable-values
3030 safe-local-variable-values))))
3034 "Return local variables specified in the -*- line.
3035 Ignore any specification for `mode:' and `coding:';
3036 `set-auto-mode' should already have handled `mode:',
3037 `set-auto-coding' should already have handled `coding:'.
3039 If MODE-ONLY is non-nil, all we do is check whether the major
3040 mode is specified, returning t if it is specified. Otherwise,
3041 return an alist of elements (VAR . VAL), where VAR is a variable
3042 and VAL is the specified value."
3046 result mode-specified)
3047 ;; Parse the -*- line into the RESULT alist.
3048 ;; Also set MODE-SPECIFIED if we see a spec or `mode'.
3050 nil)
3052 ;; Simple form: "-*- MODENAME -*-". Already handled.
3054 nil)
3056 ;; Hairy form: '-*-' [ <variable> ':' <value> ';' ]* '-*-'
3057 ;; (last ";" is optional).
3062 ;; There used to be a downcase here,
3063 ;; but the manual didn't say so,
3064 ;; and people want to set var names that aren't all lc.
3070 ;; It is traditional to ignore
3071 ;; case when checking for `mode' in set-auto-mode,
3072 ;; so we must do that here as well.
3073 ;; That is inconsistent, but we're stuck with it.
3074 ;; The same can be said for `coding' in set-auto-coding.
3080 'eval
3087 mode-specified
3088 result))))
3091 "Filter local variable settings, querying the user if necessary.
3092 VARIABLES is the alist of variable-value settings. This alist is
3093 filtered based on the values of `ignored-local-variables',
3094 `enable-local-eval', `enable-local-variables', and (if necessary)
3095 user interaction. The results are added to
3096 `file-local-variables-alist', without applying them.
3097 If these settings come from directory-local variables, then
3098 DIR-NAME is the name of the associated directory. Otherwise it is nil."
3099 ;; Find those variables that we may want to save to
3100 ;; `safe-local-variable-values'.
3106 ;; Ignore any variable in `ignored-local-variables'.
3107 nil)
3108 ;; Obey `enable-local-eval'.
3116 ;; Ignore duplicates (except `mode') in the present list.
3118 ;; Accept known-safe variables.
3122 ;; The variable is either risky or unsafe:
3129 ;; Query, unless all vars are safe or user wants no querying.
3135 risky-vars dir-name))
3146 "Parse and put into effect this buffer's local variables spec.
3147 If MODE-ONLY is non-nil, all we do is check whether the major mode
3148 is specified, returning t if it is specified."
3151 result)
3158 ;; Look for "Local variables:" line in last page.
3166 ;; suffix is what comes after "local variables:" in its line.
3167 ;; prefix is what comes before "local variables:" in its line.
3177 beg)
3181 endpos
3187 nil t))
3188 ;; This used to be an error, but really all it means is
3189 ;; that this may simply not be a local-variables section,
3190 ;; so just ignore it.
3200 ;; Discard the prefix.
3205 ;; Discard the suffix.
3213 ;; Find the variable name; strip whitespace.
3222 val)
3223 ;; Read the variable value.
3234 'eval
3239 ;; Now we've read all the local variables.
3240 ;; If MODE-ONLY is non-nil, return whether the mode was specified.
3242 ;; Otherwise, set the variables.
3249 ;; Any 'evals must run in the Right sequence.
3258 "Non-nil if SYM is safe as a file-local variable with value VAL.
3259 It is safe if any of these conditions are met:
3261 * There is a matching entry (SYM . VAL) in the
3262 `safe-local-variable-values' user option.
3264 * The `safe-local-variable' property of SYM is a function that
3265 evaluates to a non-nil value with VAL as an argument."
3269 ;; If the function signals an error, that means it
3270 ;; can't assure us that the value is safe.
3274 "Non-nil if SYM could be dangerous as a file-local variable.
3275 It is dangerous if either of these conditions are met:
3277 * Its `risky-local-variable' property is non-nil.
3283 ;; If this is an alias, check the base name.
3303 "Return t if it is safe to eval EXP when it is found in a file."
3305 ;; Detect certain `put' expressions.
3312 lisp-indent-function
3313 scheme-indent-function))
3314 ;; Only allow safe values (not functions).
3319 ;; Only allow indirect form specs.
3320 ;; During bootstrapping, edebug-basic-spec might not be
3321 ;; defined yet.
3325 ;; Allow expressions that the user requested.
3327 ;; Certain functions can be allowed with safe arguments
3328 ;; or can specify verification functions to try.
3336 ok))
3344 ok)))))))
3347 "Set local variable VAR with value VAL.
3348 If VAR is `mode', call `VAL-mode' as a function unless it's
3349 already the major mode."
3356 ;; A minor mode must be passed an argument.
3357 ;; Otherwise, if the user enables the minor mode in a
3358 ;; major mode hook, this would toggle it off.
3364 ;; Make sure the string has no text properties.
3365 ;; Some text properties can get evaluated in various ways,
3366 ;; so it is risky to put them on with a local variable list.
3370 \f
3371 ;;; Handling directory-local variables, aka project settings.
3377 "List of cached directory roots for directory-local variable classes.
3378 Each element in this list has the form (DIR CLASS MTIME).
3379 DIR is the name of the directory.
3380 CLASS is the name of a variable class (a symbol).
3381 MTIME is the recorded modification time of the directory-local
3382 variables file associated with this entry. This time is a list
3383 of two integers (the same format as `file-attributes'), and is
3384 used to test whether the cache entry is still valid.
3385 Alternatively, MTIME can be nil, which means the entry is always
3389 "Return the variable list for CLASS."
3393 "Collect directory-local variables from MODE-VARIABLES.
3394 VARIABLES is the initial list of variables.
3395 Returns the new list."
3400 ;; If variables are specified more than once, only use the last. (Why?)
3401 ;; The pseudo-variables mode and eval are different (bug#3430).
3404 ;; Need a new cons in case we setcdr later.
3408 "Collect entries from CLASS-VARIABLES into VARIABLES.
3409 ROOT is the root directory of the project.
3410 Return the new variables list."
3413 ;; FIXME: Why not use file-relative-name?
3420 ;; Don't include this in the previous condition, because we
3421 ;; want to filter all strings before the next condition.
3435 ;; TODO someone might want to extend this to allow
3436 ;; integer values for subdir, where N means
3437 ;; variables apply to this directory and N levels
3438 ;; below it (0 == nil).
3441 alist variables))))))))
3443 ;; The file's content might be invalid (e.g. have a merge conflict), but
3444 ;; that shouldn't prevent the user from opening the file.
3446 nil))))
3449 "Declare that the DIRECTORY root is an instance of CLASS.
3450 DIRECTORY is the name of a directory, a string.
3451 CLASS is the name of a project class, a symbol.
3452 MTIME is either the modification time of the directory-local
3453 variables file that defined this class, or nil.
3455 When a file beneath DIRECTORY is visited, the mode-specific
3456 variables from CLASS are applied to the buffer. The variables
3457 for a class are defined using `dir-locals-set-class-variables'."
3464 "Map the type CLASS to a list of variable settings.
3465 CLASS is the project class, a symbol. VARIABLES is a list
3466 that declares directory-local variables for the class.
3467 An element in VARIABLES is either of the form:
3468 (MAJOR-MODE . ALIST)
3469 or
3470 (DIRECTORY . LIST)
3472 In the first form, MAJOR-MODE is a symbol, and ALIST is an alist
3473 whose elements are of the form (VARIABLE . VALUE).
3475 In the second form, DIRECTORY is a directory name (a string), and
3476 LIST is a list of the form accepted by the function.
3478 When a file is visited, the file's class is found. A directory
3479 may be assigned a class using `dir-locals-set-directory-class'.
3480 Then variables are set in the file's buffer according to the
3481 class' LIST. The list is processed in order.
3483 * If the element is of the form (MAJOR-MODE . ALIST), and the
3484 buffer's major mode is derived from MAJOR-MODE (as determined
3485 by `derived-mode-p'), then all the variables in ALIST are
3486 applied. A MAJOR-MODE of nil may be used to match any buffer.
3487 `make-local-variable' is called for each variable before it is
3488 set.
3490 * If the element is of the form (DIRECTORY . LIST), and DIRECTORY
3491 is an initial substring of the file's directory, then LIST is
3492 applied by recursively following these rules."
3499 "File that contains directory-local variables.
3500 It has to be constant to enforce uniform values
3504 "Find the directory-local variables for FILE.
3505 This searches upward in the directory tree from FILE.
3506 It stops at the first directory that has been registered in
3507 `dir-locals-directory-cache' or contains a `dir-locals-file'.
3508 If it finds an entry in the cache, it checks that it is valid.
3509 A cache entry with no modification time element (normally, one that
3510 has been assigned directly using `dir-locals-set-directory-class', not
3511 set from a file) is always valid.
3512 A cache entry based on a `dir-locals-file' is valid if the modification
3513 time stored in the cache matches the current file modification time.
3514 If not, the cache entry is cleared so that the file will be re-read.
3516 This function returns either nil (no directory local variables found),
3517 or the matching entry from `dir-locals-directory-cache' (a list),
3518 or the full path to the `dir-locals-file' (a string) in the case
3519 of no valid cache entry."
3524 dir-locals-file))
3527 ;; `locate-dominating-file' may have abbreviated the name.
3530 ;; Find the best cached value in `dir-locals-directory-cache'.
3542 ;; Found a potential cache entry. Check validity.
3543 ;; A cache entry with no MTIME is assumed to always be valid
3544 ;; (ie, set directly, not from a dir-locals file).
3545 ;; Note, we don't bother to check that there is a matching class
3546 ;; element in dir-locals-class-alist, since that's done by
3547 ;; dir-locals-set-directory-class.
3554 ;; This cache entry is OK.
3555 dir-elt
3556 ;; This cache entry is invalid; clear it.
3559 ;; Return the first existing dir-locals file. Might be the same
3560 ;; as dir-elt's, might not (eg latter might have been deleted).
3561 locals-file)
3562 ;; No cache entry.
3563 locals-file)))
3566 "Load a variables FILE and register a new class and instance.
3567 FILE is the name of the file holding the variables to apply.
3568 The new class name is the same as the directory in which FILE
3569 is found. Returns the new class name."
3579 class-name)))
3582 "Read per-directory local variables for the current buffer.
3583 Store the directory-local variables in `dir-local-variables-alist'
3584 and `file-local-variables-alist', without applying them."
3587 ;; Find the variables file.
3614 \f
3617 However, the mode will not be changed if
3618 \(1) a local variables list or the `-*-' line specifies a major mode, or
3620 \ not suitable for ordinary files, or
3621 \(3) the new file name does not particularly specify any mode."
3626 "Change name of file visited in current buffer to FILENAME.
3627 This also renames the buffer to correspond to the new file.
3628 The next time the buffer is saved it will go in the newly specified file.
3629 FILENAME nil or an empty string means mark buffer as not visiting any file.
3630 Remember to delete the initial contents of the minibuffer
3631 if you wish to pass an empty string as the argument.
3633 The optional second argument NO-QUERY, if non-nil, inhibits asking for
3634 confirmation in the case where another buffer is already visiting FILENAME.
3636 The optional third argument ALONG-WITH-FILE, if non-nil, means that
3637 the old visited file has been renamed to the new name FILENAME."
3645 nil
3660 filename)))
3670 ;; If new-name == old-name, renaming would add a spurious <2>
3671 ;; and it's considered as a feature in rename-buffer.
3677 ;; Abbreviate the file names of the buffer.
3686 nil)))
3687 ;; write-file-functions is normally used for things like ftp-find-file
3688 ;; that visit things that are not local files as if they were files.
3689 ;; Changing to visit an ordinary local file instead should flush the hook.
3694 ;; If buffer was read-only because of version control,
3695 ;; that reason is gone now, so make it writable.
3699 ;; Turn off backup files for certain file names.
3700 ;; Since this is a permanent local, the major mode won't eliminate it.
3702 backup-enable-predicate
3708 ;; If auto-save was not already on, turn it on if appropriate.
3712 ;; If auto save is on, start using a new name.
3713 ;; We deliberately don't rename or delete the old auto save
3714 ;; for the old visited file name. This is because perhaps
3715 ;; the user wants to save the new state and then compare with the
3716 ;; previous state from the auto save file.
3719 ;; Rename the old auto save file if any.
3726 ;; Update the major mode, if the file name determines it.
3728 ;; Don't change the mode if it is special.
3731 ;; Don't change the mode if the local variable list specifies it.
3737 "Write current buffer into file FILENAME.
3738 This makes the buffer visit that file, and marks it as not modified.
3740 If you specify just a directory name as FILENAME, that means to use
3741 the default file name but in that directory. You can also yank
3742 the default file name into the minibuffer to edit it, using \\<minibuffer-local-map>\\[next-history-element].
3744 If the buffer is not already visiting a file, the default file name
3745 for the output file is the buffer name.
3747 If optional second arg CONFIRM is non-nil, this function
3748 asks for confirmation before overwriting an existing file.
3749 Interactively, confirmation is required unless you supply a prefix argument."
3750 ;; (interactive "FWrite file: ")
3754 nil nil nil nil)
3758 default-directory)
3759 nil nil))
3763 ;; If arg is just a directory,
3764 ;; use the default file name, but in that directory.
3775 ;; Make buffer writable if file is writable.
3780 ;; It's likely that the VC status at the new location is different from
3781 ;; the one at the old location.
3783 \f
3785 "Make a backup of the disk file visited by the current buffer, if appropriate.
3786 This is normally done before saving the buffer the first time.
3788 A backup may be done by renaming or by copying; see documentation of
3789 variable `make-backup-files'. If it's done by renaming, then the file is
3790 no longer accessible under its old name.
3792 The value is non-nil after a backup was made by renaming.
3793 It has the form (MODES SELINUXCONTEXT BACKUPNAME).
3794 MODES is the result of `file-modes' on the original
3795 file; this means that the caller, after saving the buffer, should change
3796 the modes of the new file to agree with the old modes.
3797 SELINUXCONTEXT is the result of `file-selinux-context' on the original
3798 file; this means that the caller, after saving the buffer, should change
3799 the SELinux context of the new file to agree with the old context.
3800 BACKUPNAME is the backup file name, which is the old file renamed."
3807 backup-info backupname targets setmodes)
3808 ;; If specified name is a symbolic link, chase it to the target.
3809 ;; Thus we make the backups in the directory where the real file is.
3814 ;; (if (file-directory-p buffer-file-name)
3815 ;; (error "Cannot save buffer in directory %s" buffer-file-name))
3819 ;; If have old versions to maybe delete,
3820 ;; ask the user to confirm now, before doing anything.
3821 ;; But don't actually delete til later.
3826 real-file-name)))))
3829 ;; Actually write the back up file.
3832 ; (file-symlink-p buffer-file-name)
3833 backup-by-copying
3834 ;; Don't rename a suid or sgid file.
3849 ;; rename-file should delete old backup.
3853 ;; If trouble writing the backup, write it in
3854 ;; .emacs.d/%backup%.
3857 backupname)
3861 ;; Now delete the old versions, if desired.
3868 setmodes)
3875 ;; Create temp files with strict access rights. It's easy to
3876 ;; loosen them later, whereas it's impossible to close the
3877 ;; time-window of loose permissions otherwise.
3880 ;; Try to overwrite old backup first.
3888 nil)
3890 ;; The file was somehow created by someone else between
3891 ;; `delete-file' and `copy-file', so let's try again.
3892 ;; rms says "I think there is also a possible race
3893 ;; condition for making backup files" (emacs-devel 20070821).
3894 nil)))
3895 ;; Reset the umask.
3904 ;; The last ~[[:digit]]+ matches relative versions in git,
3905 ;; e.g. `foo.js.~HEAD~1~'.
3906 "Regular expression matching the backup/version part of a file name.
3910 "Return file NAME sans backup versions or strings.
3911 This is a separate procedure so your site-init or startup file can
3912 redefine it.
3913 If the optional argument KEEP-BACKUP-VERSION is non-nil,
3914 we do not remove backup version numbers, only true file version numbers.
3915 See also `file-name-version-regexp'."
3922 name))))))
3925 "Return t if deleting FILE and rewriting it would preserve the owner."
3930 ;; Return t if the file doesn't exist, since it's true that no
3931 ;; information would be lost by an (attempted) delete and create.
3934 ;; Files created on Windows by Administrator (RID=500)
3935 ;; have the Administrators group (RID=544) recorded as
3936 ;; their owner. Rewriting them will still preserve the
3937 ;; owner.
3943 The extension, in a file name, is the part that follows the last `.',
3944 except that a leading `.', if any, doesn't count."
3947 directory)
3951 ;; Don't use expand-file-name here; if DIRECTORY is relative,
3952 ;; we don't want to expand it.
3955 filename))))
3959 The extension, in a file name, is the part that follows the last `.',
3960 excluding version numbers and backup suffixes,
3961 except that a leading `.', if any, doesn't count.
3962 Return nil for extensionless file names such as `foo'.
3963 Return the empty string for file names such as `foo.'.
3965 If PERIOD is non-nil, then the returned value includes the period
3966 that delimits the extension, and if FILENAME has no extension,
3977 "A function to use instead of the default `make-backup-file-name'.
3978 A value of nil gives the default `make-backup-file-name' behavior.
3980 This could be buffer-local to do something special for specific
3981 files. If you define it, you may need to change `backup-file-name-p'
3982 and `file-name-sans-versions' too.
3984 See also `backup-directory-alist'."
3990 "Alist of filename patterns and backup directory names.
3991 Each element looks like (REGEXP . DIRECTORY). Backups of files with
3992 names matching REGEXP will be made in DIRECTORY. DIRECTORY may be
3993 relative or absolute. If it is absolute, so that all matching files
3994 are backed up into the same directory, the file names in this
3995 directory will be the full name of the file backed up with all
3996 directory separators changed to `!' to prevent clashes. This will not
3997 work correctly if your filesystem truncates the resulting name.
3999 For the common case of all backups going into one directory, the alist
4001 directory name.
4003 If this variable is nil, or it fails to match a filename, the backup
4004 is made in the original file's directory.
4006 On MS-DOS filesystems without long names this variable is always
4007 ignored."
4013 "Default `backup-enable-predicate' function.
4014 Checks for files in `temporary-file-directory',
4015 `small-temporary-file-directory', and /tmp."
4018 ;; Directory is under temporary-file-directory.
4023 ;; Directory is under /tmp.
4028 0 nil
4030 ;; Directory is under small-temporary-file-directory.
4035 "Create the non-numeric backup file name for FILE.
4036 Normally this will just be the file's name with `~' appended.
4037 Customization hooks are provided as follows.
4039 If the variable `make-backup-file-name-function' is non-nil, its value
4040 should be a function which will be called with FILE as its argument;
4041 the resulting name is used.
4043 Otherwise a match for FILE is sought in `backup-directory-alist'; see
4044 the documentation of that variable. If the directory for the backup
4045 doesn't exist, it is created."
4059 "Subroutine of `make-backup-file-name' and `find-backup-file-name'."
4061 elt backup-directory abs-backup-directory)
4066 alist nil)))
4067 ;; If backup-directory is relative, it should be relative to the
4068 ;; file's directory. By expanding explicitly here, we avoid
4069 ;; depending on default-directory.
4078 abs-backup-directory nil))))
4080 file
4084 ;; Normalize DOSish file names: downcase the drive
4085 ;; letter, if any, and replace the leading "x:" with
4086 ;; "/drive_x".
4089 ;; Replace any invalid file-name characters (for the
4090 ;; case of backing up remote files).
4094 "drive_"
4097 ""
4100 ;; Make the name unique by substituting directory
4101 ;; separators. It may not really be worth bothering about
4102 ;; doubling `!'s in the original name...
4107 backup-directory))
4112 "Return non-nil if FILE is a backup file name (numeric or not).
4113 This is a separate function so you can redefine it for customization.
4114 You may need to redefine `file-name-sans-versions' as well."
4119 ;; This is used in various files.
4120 ;; The usage of backup-extract-version-start is not very clean,
4121 ;; but I can't see a good alternative, so as of now I am leaving it alone.
4123 "Given the name of a numeric backup file, FN, return the backup number.
4124 Uses the free variable `backup-extract-version-start', whose value should be
4125 the index in the name where the version number begins."
4132 "Find a file name for a backup file FN, and suggestions for deletions.
4133 Value is a list whose car is the name for the backup file
4134 and whose cdr is a list of old versions to consider deleting now.
4135 If the value is nil, don't make a backup.
4136 Uses `backup-directory-alist' in the same way as does
4137 `make-backup-file-name'."
4139 ;; Run a handler for this function so that ange-ftp can refuse to do it.
4143 ;; We don't support numbered backups on plain MS-DOS
4144 ;; when long file names are unavailable.
4154 possibilities deserve-versions-p versions)
4157 base-versions
4160 possibilities)
4161 #'<)
4166 kept-old-versions
4167 kept-new-versions
4174 ;; Delete nothing if there is overflow
4175 ;; in the number of versions to keep.
4181 v))))))))))
4184 "Return number of names file FILENAME has."
4187 ;; (defun file-relative-name (filename &optional directory)
4188 ;; "Convert FILENAME to be relative to DIRECTORY (default: `default-directory').
4189 ;; This function returns a relative file name which is equivalent to FILENAME
4190 ;; when used with that default directory as the default.
4191 ;; If this is impossible (which can happen on MSDOS and Windows
4192 ;; when the file name and directory use different drive names)
4193 ;; then it returns FILENAME."
4194 ;; (save-match-data
4195 ;; (let ((fname (expand-file-name filename)))
4196 ;; (setq directory (file-name-as-directory
4197 ;; (expand-file-name (or directory default-directory))))
4198 ;; ;; On Microsoft OSes, if FILENAME and DIRECTORY have different
4199 ;; ;; drive names, they can't be relative, so return the absolute name.
4200 ;; (if (and (or (eq system-type 'ms-dos)
4201 ;; (eq system-type 'cygwin)
4202 ;; (eq system-type 'windows-nt))
4203 ;; (not (string-equal (substring fname 0 2)
4204 ;; (substring directory 0 2))))
4205 ;; filename
4206 ;; (let ((ancestor ".")
4207 ;; (fname-dir (file-name-as-directory fname)))
4208 ;; (while (and (not (string-match (concat "^" (regexp-quote directory)) fname-dir))
4209 ;; (not (string-match (concat "^" (regexp-quote directory)) fname)))
4210 ;; (setq directory (file-name-directory (substring directory 0 -1))
4211 ;; ancestor (if (equal ancestor ".")
4212 ;; ".."
4213 ;; (concat "../" ancestor))))
4214 ;; ;; Now ancestor is empty, or .., or ../.., etc.
4215 ;; (if (string-match (concat "^" (regexp-quote directory)) fname)
4216 ;; ;; We matched within FNAME's directory part.
4217 ;; ;; Add the rest of FNAME onto ANCESTOR.
4218 ;; (let ((rest (substring fname (match-end 0))))
4219 ;; (if (and (equal ancestor ".")
4220 ;; (not (equal rest "")))
4221 ;; ;; But don't bother with ANCESTOR if it would give us `./'.
4222 ;; rest
4223 ;; (concat (file-name-as-directory ancestor) rest)))
4224 ;; ;; We matched FNAME's directory equivalent.
4225 ;; ancestor))))))
4228 "Convert FILENAME to be relative to DIRECTORY (default: `default-directory').
4229 This function returns a relative file name which is equivalent to FILENAME
4230 when used with that default directory as the default.
4231 If FILENAME and DIRECTORY lie on different machines or on different drives
4232 on a DOS/Windows machine, it returns FILENAME in expanded form."
4236 default-directory))))
4242 ;; Test for different filesystems on DOS/Windows
4244 ;; Should `cygwin' really be included here? --stef
4247 ;; Test for different drive letters
4249 ;; Test for UNCs on different servers
4254 ;; Windows file names cannot have ? in
4255 ;; them, so use that to detect when
4256 ;; neither FILENAME nor DIRECTORY is a
4257 ;; UNC.
4259 0 nil
4265 ;; Test for different remote file system identification
4267 filename
4273 directory nil nil case-fold-search))
4275 directory nil nil case-fold-search))))
4278 ".."
4280 ;; Now ancestor is empty, or .., or ../.., etc.
4282 directory nil nil case-fold-search))
4283 ;; We matched within FILENAME's directory part.
4284 ;; Add the rest of FILENAME onto ANCESTOR.
4287 ;; But don't bother with ANCESTOR if it would give us `./'.
4288 rest
4290 ;; We matched FILENAME's directory equivalent.
4291 ancestor))))))
4292 \f
4294 "Save current buffer in visited file if modified.
4295 Variations are described below.
4297 By default, makes the previous version into a backup file
4298 if previously requested or if this is the first save.
4300 to become a backup when the next save is done.
4302 unconditionally makes the previous version into a backup file.
4304 to become a backup when the next save is done,
4305 and unconditionally makes the previous version into a backup file.
4307 With a numeric argument of 0, never make the previous version
4308 into a backup file.
4310 If a file's name is FOO, the names of its numbered backup versions are
4311 FOO.~i~ for various integers i. A non-numbered backup file is called FOO~.
4312 Numeric backups (rather than FOO~) will be made if value of
4313 `version-control' is not the atom `never' and either there are already
4314 numeric versions of the file being backed up, or `version-control' is
4315 non-nil.
4316 We don't want excessive versions piling up, so there are variables
4317 `kept-old-versions', which tells Emacs how many oldest versions to keep,
4318 and `kept-new-versions', which tells how many newest versions to keep.
4319 Defaults are 2 old versions and 2 new.
4320 `dired-kept-versions' controls dired's clean-directory (.) command.
4321 If `delete-old-versions' is nil, system will query user
4322 before trimming versions. Otherwise it does it silently.
4324 If `vc-make-backup-files' is nil, which is the default,
4325 no backup files are made for files managed by version control.
4326 (This is because the version control system itself records previous versions.)
4328 See the subroutine `basic-save-buffer' for more information."
4334 ;; We used to display the message below only for files > 50KB, but
4335 ;; then Rmail-mbox never displays it due to buffer swapping. If
4336 ;; the test is ever re-introduced, be sure to handle saving of
4337 ;; Rmail files.
4344 "Delete auto-save file for current buffer if `delete-auto-save-files' is t.
4345 Normally delete only if the file was written by this Emacs since
4346 the last real save, but optional arg FORCE non-nil means delete anyway."
4360 "Normal hook that is run before a buffer is saved to its file."
4366 "Normal hook that is run after a buffer is saved to its file."
4372 "If non-nil, use this coding system for saving the buffer.
4373 More precisely, use this coding system in place of the
4374 value of `buffer-file-coding-system', when saving the buffer.
4375 Calling `write-region' for any purpose other than saving the buffer
4376 will still use `buffer-file-coding-system'; this variable has no effect
4383 "Save the current buffer in its visited file, if it has been modified.
4384 The hooks `write-contents-functions' and `write-file-functions' get a chance
4385 to do the job of saving; if they do not, then the buffer is saved in
4386 the visited file in the usual way.
4387 Before and after saving the buffer, this function runs
4388 `before-save-hook' and `after-save-hook', respectively."
4391 ;; In an indirect buffer, save its base buffer instead.
4395 ;; handle the case when no modification has been made but
4396 ;; the file disappeared since visited
4400 setmodes)
4401 ;; If buffer has no file name, ask user for one.
4408 ;; Signal an error if the user specified the name of an
4409 ;; existing directory.
4412 filename))
4414 ;; Signal an error if the specified name refers to a
4415 ;; non-existing directory.
4426 "%s has changed since visited or saved. Save anyway? "
4446 ;; Support VC version backups.
4452 ;; If a hook returned t, file is already "written".
4453 ;; Otherwise, write it the usual way now.
4455 ;; Now we have saved the current buffer. Let's make sure
4456 ;; that buffer-file-coding-system is fixed to what
4457 ;; actually used for saving by binding it locally.
4469 ;; If the auto-save file was recent before this command,
4470 ;; delete it now.
4472 ;; Support VC `implicit' locking.
4477 ;; This does the "real job" of writing a buffer into its visited file
4478 ;; and making a backup file. This is what is normally done
4479 ;; but inhibited if one of write-file-functions returns non-nil.
4480 ;; It returns a value (MODES SELINUXCONTEXT BACKUPNAME), like backup-buffer.
4492 ;; This returns a value (MODES SELINUXCONTEXT BACKUPNAME), like backup-buffer.
4505 "File %s is write-protected; try to save anyway? "
4507 buffer-file-name)))
4521 ;; Write temp name, then rename it.
4522 ;; This requires write access to the containing dir,
4523 ;; which is why we don't try it if we don't have that access.
4525 tempname succeed
4528 ;; Create temp files with strict access rights. It's easy to
4529 ;; loosen them later, whereas it's impossible to close the
4530 ;; time-window of loose permissions otherwise.
4535 ;; Try various temporary names.
4536 ;; This code follows the example of make-temp-file,
4537 ;; but it calls write-region in the appropriate way
4538 ;; for saving the buffer.
4544 ;; Pass in nil&nil rather than point-min&max
4545 ;; cause we're saving the whole buffer.
4546 ;; write-region-annotate-functions may use it.
4548 tempname nil realname
4550 nil)
4552 ;; The file was somehow created by someone else between
4553 ;; `make-temp-name' and `write-region', let's try again.
4554 nil)
4556 ;; Reset the umask.
4558 ;; If we failed, restore the buffer's modtime.
4561 ;; Since we have created an entirely new file,
4562 ;; make sure it gets the right permission bits set.
4567 buffer-file-name)))
4568 ;; We succeeded in writing the temp file,
4569 ;; so rename it.
4571 ;; If file not writable, see if we can make it writable
4572 ;; temporarily while we write it.
4573 ;; But no need to do so if we have just backed it up
4574 ;; (setmodes is set) because that says we're superseding.
4576 ;; Change the mode back, after writing.
4579 buffer-file-name))
4585 ;; Pass in nil&nil rather than point-min&max to indicate
4586 ;; we're saving the buffer rather than just a region.
4587 ;; write-region-annotate-functions may make us of it.
4589 buffer-file-name nil t buffer-file-truename)
4591 ;; If we get an error writing the new file, and we made
4592 ;; the backup by renaming, undo the backing-up.
4597 setmodes))
4603 `((?\C-r
4610 ;; Return nil to ask about BUF again.
4611 nil)
4624 ;; Return nil to ask about BUF again.
4625 nil)
4635 "Save some modified file-visiting buffers. Asks user about each one.
4636 You can answer `y' to save, `n' not to save, `C-r' to look at the
4637 buffer in question with `view-buffer' before deciding or `d' to
4638 view the differences using `diff-buffer-with-file'.
4640 This command first saves any buffers where `buffer-save-without-query' is
4641 non-nil, without asking.
4643 Optional argument (the prefix) non-nil means save all with no questions.
4644 Optional second argument PRED determines which buffers are considered:
4645 If PRED is nil, all the file-visiting buffers are considered.
4646 If PRED is t, then certain non-file buffers will also be considered.
4647 If PRED is a zero-argument function, it indicates for each buffer whether
4648 to consider it or not when called with that buffer current.
4650 See `save-some-buffers-action-alist' if you want to
4651 change the additional actions you can take on files."
4655 files-done abbrevs-done)
4657 ;; First save any buffers that we're supposed to save unconditionally.
4658 ;; That way the following code won't ask about them.
4663 ;; Ask about those buffers that merit it,
4664 ;; and record the number thus saved.
4668 ;; Note that killing some buffers may kill others via
4669 ;; hooks (e.g. Rmail and its viewing buffer).
4682 t
4694 save-some-buffers-action-alist))
4695 ;; Maybe to save abbrevs, and record whether
4696 ;; we either saved them or asked to.
4703 ;; Don't keep bothering user if he says no.
4716 \f
4718 "Mark current buffer as unmodified, not needing to be saved.
4721 It is not a good idea to use this function in Lisp programs, because it
4722 prints a message in the minibuffer. Instead, use `set-buffer-modified-p'."
4729 "Change whether this buffer is read-only.
4730 With prefix argument ARG, make the buffer read-only if ARG is
4731 positive, otherwise make it writable. If buffer is read-only
4732 and `view-read-only' is non-nil, enter view mode."
4737 nil ; do nothing.
4738 ;; Toggle.
4745 ;; If view-mode is already active, `view-mode-enter' is a nop.
4757 "Insert contents of file FILENAME into buffer after point.
4758 Set mark after the inserted text.
4760 This function is meant for the user to run interactively.
4761 Don't call it from programs! Use `insert-file-contents' instead.
4762 \(Its calling sequence is different; see its documentation)."
4767 "Append the contents of the region to the end of file FILENAME.
4768 When called from a function, expects three arguments,
4769 START, END and FILENAME. START and END are normally buffer positions
4770 specifying the part of the buffer to write.
4771 If START is nil, that means to use the entire buffer contents.
4772 If START is a string, then output that string to the file
4773 instead of any buffer contents; END is ignored.
4775 This does character code conversion and applies annotations
4776 like `write-region' does."
4781 "Return most recent backup file for FILENAME or nil if no backups exist."
4782 ;; `make-backup-file-name' will get us the right directory for
4783 ;; ordinary or numeric backups. It might create a directory for
4784 ;; backups as a side-effect, according to `backup-directory-alist'.
4791 tem)
4800 newest))
4803 "Rename current buffer to a similar name not already taken.
4804 This function is useful for creating multiple shell process buffers
4805 or multiple mail buffers, etc."
4813 ;; If the existing buffer name has a <NNN>,
4814 ;; which isn't part of the file name (if any),
4815 ;; then get rid of that.
4821 "Create the directory DIR and optionally any nonexistent parent dirs.
4822 If DIR already exists as a directory, signal an error, unless
4823 PARENTS is non-nil.
4825 Interactively, the default choice of directory to create is the
4826 current buffer's default directory. That is useful when you have
4827 visited a file in a nonexistent directory.
4829 Noninteractively, the second (optional) argument PARENTS, if
4830 non-nil, says whether to create parent directories that don't
4831 exist. Interactively, this happens by default."
4834 nil nil)
4835 t))
4836 ;; If default-directory is a remote directory,
4837 ;; make sure we find its make-directory handler.
4845 create-list)
4847 ;; If directory is its own parent, then we can't
4848 ;; keep looping forever
4863 "Delete the directory named DIRECTORY. Does not follow symlinks.
4864 If RECURSIVE is non-nil, all files in DIRECTORY are deleted as well.
4865 TRASH non-nil means to trash the directory instead, provided
4866 `delete-by-moving-to-trash' is non-nil.
4868 When called interactively, TRASH is t if no prefix argument is
4869 given. With a prefix argument, TRASH is nil."
4876 "Move directory to trash: "
4878 default-directory default-directory nil nil))))
4884 nil)
4886 ;; If default-directory is a remote directory, make sure we find its
4887 ;; delete-directory handler.
4894 ;; Only move non-empty dir to trash if recursive deletion was
4895 ;; requested. This mimics the non-`delete-by-moving-to-trash'
4896 ;; case, where the operation fails in delete-directory-internal.
4897 ;; As `move-file-to-trash' trashes directories (empty or
4898 ;; otherwise) as a unit, we do not need to recurse here.
4900 ;; Check if directory is empty apart from "." and "..".
4905 ;; Otherwise, call outselves recursively if needed.
4909 ;; This test is equivalent to
4910 ;; (and (file-directory-p fn) (not (file-symlink-p fn)))
4911 ;; but more efficient
4915 ;; We do not want to delete "." and "..".
4921 "Copy DIRECTORY to NEWNAME. Both args must be strings.
4922 This function always sets the file modes of the output files to match
4923 the corresponding input file.
4925 The third arg KEEP-TIME non-nil means give the output files the same
4926 last-modified time as the old ones. (This works on only some systems.)
4928 A prefix arg makes KEEP-TIME non-nil.
4930 Noninteractively, the last argument PARENTS says whether to
4931 create parent directories if they don't exist. Interactively,
4932 this happens by default.
4934 If NEWNAME names an existing directory, copy DIRECTORY as a
4935 subdirectory there. However, if called from Lisp with a non-nil
4936 optional argument COPY-CONTENTS, copy the contents of DIRECTORY
4937 directly into NEWNAME instead."
4944 default-directory default-directory nil nil)
4945 current-prefix-arg t nil)))
4946 ;; If default-directory is a remote directory, make sure we find its
4947 ;; copy-directory handler.
4953 ;; Compute target name.
4958 ;; If NEWNAME is not an existing directory, create it;
4959 ;; that is where we will copy the files of DIRECTORY.
4961 ;; If NEWNAME is an existing directory and COPY-CONTENTS
4962 ;; is nil, copy into NEWNAME/[DIRECTORY-BASENAME].
4967 newname))
4971 newname))
4974 ;; Copy recursively.
4976 ;; We do not want to copy "." and "..".
4978 directory-files-no-dot-files-regexp))
4987 ;; Set directory attributes.
4991 \f
4994 "Function to use to revert this buffer, or nil to do the default.
4995 The function receives two arguments IGNORE-AUTO and NOCONFIRM,
5000 "Function to use to insert contents when reverting this buffer.
5001 Gets two args, first the nominal file name to use,
5002 and second, t if reading the auto-save file.
5007 "Function to check whether a non-file buffer needs reverting.
5008 This should be a function with one optional argument NOCONFIRM.
5009 Auto Revert Mode passes t for NOCONFIRM. The function should return
5010 non-nil if the buffer should be reverted. A return value of
5011 `fast' means that the need for reverting was not checked, but
5012 that reverting the buffer is fast. The buffer is current when
5013 this function is called.
5015 The idea behind the NOCONFIRM argument is that it should be
5016 non-nil if the buffer is going to be reverted without asking the
5017 user. In such situations, one has to be careful with potentially
5018 time consuming operations.
5020 For more information on how this variable is used by Auto Revert mode,
5024 "Normal hook for `revert-buffer' to run before reverting.
5025 If `revert-buffer-function' is used to override the normal revert
5029 "Normal hook for `revert-buffer' to run after reverting.
5030 Note that the hook value that it runs is the value that was in effect
5031 before reverting; that makes a difference if you have buffer-local
5032 hook functions.
5034 If `revert-buffer-function' is used to override the normal revert
5038 "Non-nil if a `revert-buffer' operation is in progress, nil otherwise.
5044 "Replace current buffer text with the text of the visited file on disk.
5045 This undoes all changes since the file was visited or saved.
5046 With a prefix argument, offer to revert from latest auto-save file, if
5047 that is more recent than the visited file.
5049 This command also implements an interface for special buffers
5050 that contain text which doesn't come from a file, but reflects
5051 some other data instead (e.g. Dired buffers, `buffer-list'
5052 buffers). This is done via the variable `revert-buffer-function'.
5053 In these cases, it should reconstruct the buffer contents from the
5054 appropriate data.
5056 When called from Lisp, the first argument is IGNORE-AUTO; only offer
5057 to revert from the auto-save file when this is nil. Note that the
5058 sense of this argument is the reverse of the prefix argument, for the
5059 sake of backward compatibility. IGNORE-AUTO is optional, defaulting
5060 to nil.
5062 Optional second argument NOCONFIRM means don't ask for confirmation
5063 at all. (The variable `revert-without-query' offers another way to
5064 revert buffers without querying for confirmation.)
5066 Optional third argument PRESERVE-MODES non-nil means don't alter
5067 the files modes. Normally we reinitialize them using `normal-mode'.
5069 If the value of `revert-buffer-function' is non-nil, it is called to
5070 do all the work for this command. Otherwise, the hooks
5071 `before-revert-hook' and `after-revert-hook' are run at the beginning
5072 and the end, and if `revert-buffer-insert-file-contents-function' is
5073 non-nil, it is called instead of rereading visited file contents."
5075 ;; I admit it's odd to reverse the sense of the prefix argument, but
5076 ;; there is a lot of code out there which assumes that the first
5077 ;; argument should be t to avoid consulting the auto-save file, and
5078 ;; there's no straightforward way to encourage authors to notice a
5079 ;; reversal of the argument sense. So I'm just changing the user
5080 ;; interface, but leaving the programmatic interface the same.
5090 buffer-auto-save-file-name
5095 buffer-auto-save-file-name
5096 buffer-file-name)))
5106 file-name)))
5108 ;; If file was backed up but has changed since,
5109 ;; we should make another backup.
5113 ;; Effectively copy the after-revert-hook status,
5114 ;; since after-find-file will clobber it.
5117 after-revert-hook))
5122 ;; Get rid of all undo records for this buffer.
5124 ;; Don't make undo records for the reversion.
5127 file-name auto-save-p)))
5130 "File %s no longer exists!"
5132 file-name))
5135 "File %s no longer readable!"
5137 file-name))
5139 ;; Bind buffer-file-name to nil
5140 ;; so that we don't try to lock the file.
5146 ;; Auto-saved file should be read by Emacs'
5147 ;; internal coding.
5151 buffer-file-coding-system-explicit
5154 coding-system-for-read
5156 coding-system-for-read)
5158 ;; As a coding system suitable for multibyte
5159 ;; buffer is specified, make the current
5160 ;; buffer multibyte.
5163 ;; This force after-insert-file-set-coding
5164 ;; (called from insert-file-contents) to set
5165 ;; buffer-file-coding-system to a proper value.
5168 ;; Note that this preserves point in an intelligent way.
5172 nil nil t))
5174 nil nil t)))))
5175 ;; Recompute the truename in case changes in symlinks
5176 ;; have changed the truename.
5180 ;; Run after-revert-hook as it was before we reverted.
5184 local-hook)
5187 t))))))
5190 "Recover the visited file--get contents from its last auto-save file."
5195 "Visit file FILE, but get contents from its last auto-save file."
5196 ;; Actually putting the file name in the minibuffer should be used
5197 ;; only rarely.
5198 ;; Not just because users often use the default.
5218 ;; Use insert-directory-safely, not insert-directory,
5219 ;; because these files might not exist. In particular,
5220 ;; FILE might not exist if the auto-save file was for
5221 ;; a buffer that didn't visit a file, such as "*mail*".
5222 ;; The code in v20.x called `ls' directly, so we need
5223 ;; to emulate what `ls' did in that case.
5229 ;; Keep the current buffer-file-coding-system.
5231 ;; Auto-saved file should be read with special coding.
5240 "Recover auto save files from a previous Emacs session.
5241 This command first displays a Dired buffer showing you the
5242 previous sessions that you could recover from.
5243 To choose one, move point to the proper line and then type C-c C-c.
5244 Then you'll be asked about a number of files to recover."
5254 auto-save-list-file-prefix)))
5255 t)
5264 ;; Each line starts with a space
5265 ;; so that Font Lock mode won't highlight the first character.
5274 "Choose one saved session to recover auto-save files from.
5275 This command is used in the special Dired buffer created by
5278 ;; Get the name of the session file to recover from.
5280 files
5286 ;; Read in the auto-save-list file.
5289 ;; Loop thru the text of that file
5290 ;; and get out the names of the files to recover.
5294 ;; This is a pair of lines for a non-file-visiting buffer.
5295 ;; Get the auto-save file name and manufacture
5296 ;; a "visited file name" from that.
5299 ;; If there is no auto-save file name, the
5300 ;; auto-save-list file is probably corrupted.
5313 ;; This pair of lines is a file-visiting
5314 ;; buffer. Use the visited file name.
5324 ;; Ignore a file if its auto-save file does not exist now.
5328 ;; The file contains a pair of line for each auto-saved buffer.
5329 ;; The first line of the pair contains the visited file name
5330 ;; or is empty if the buffer was not visiting a file.
5331 ;; The second line is the auto-save file name.
5339 files
5345 "Kill BUFFER if confirmed."
5353 "Kill some buffers. Asks the user whether to kill each one of them.
5354 Non-interactively, if optional argument LIST is non-nil, it
5355 specifies the list of buffers to kill, asking for approval for each one."
5363 ; if we killed the base buffer.
5370 "Kill buffers whose name matches the specified REGEXP.
5371 The optional second argument indicates whether to kill internal buffers too."
5380 \f
5382 "Adjust current buffer's auto save file name for current conditions.
5383 Also rename any existing auto save file, if it was made in this session."
5395 "Return file name to use for auto-saves of current buffer.
5396 Does not consider `auto-save-visited-file-name' as that variable is checked
5397 before calling this function. You can redefine this for customization.
5398 See also `auto-save-file-name-p'."
5406 result uniq)
5407 ;; Apply user-specified translations
5408 ;; to the file name.
5412 filename)
5422 filename))))
5427 ;; We truncate the file name to DOS 8+3 limits
5428 ;; before doing anything else, because the regexp
5429 ;; passed to string-match below cannot handle
5430 ;; extensions longer than 3 characters, multiple
5431 ;; dots, and other atrocities.
5436 fn)
5441 "#"
5444 ;; Make sure auto-save file names don't contain characters
5445 ;; invalid for the underlying filesystem.
5447 ;; Don't modify remote (ange-ftp) filenames
5450 result))))
5452 ;; Deal with buffers that don't have any associated files. (Mail
5453 ;; mode tends to create a good number of these.)
5457 file-name)
5458 ;; Restrict the characters used in the file name to those which
5459 ;; are known to be safe on all filesystems, url-encoding the
5460 ;; rest.
5461 ;; We do this on all platforms, because even if we are not
5462 ;; running on DOS/Windows, the current directory may be on a
5463 ;; mounted VFAT filesystem, such as a USB memory stick.
5467 ;; For multibyte characters, this will produce more than
5468 ;; 2 hex digits, so is not true URL encoding.
5472 ;; Generate the file name.
5478 ;; Try a few alternative directories, to get one we can
5479 ;; write it.
5485 ;; Don't modify remote (ange-ftp) filenames
5487 ;; The call to convert-standard-filename is in case
5488 ;; buffer-name includes characters not allowed by the
5489 ;; DOS/Windows filesystems. make-temp-file writes to the
5490 ;; file it creates, so we must fix the file name _before_
5491 ;; make-temp-file is called.
5493 fname))
5495 ;; make-temp-file creates the file,
5496 ;; but we don't want it to exist until we do an auto-save.
5500 file-name)))
5503 "Return non-nil if FILENAME can be yielded by `make-auto-save-file-name'.
5504 FILENAME should lack slashes. You can redefine this for customization."
5506 \f
5508 "Given a shell file name pattern WILDCARD, return an equivalent regexp.
5509 The generated regexp will match a filename only if the filename
5510 matches that wildcard according to shell rules. Only wildcards known
5511 by `sh' are supported."
5513 ;; Copy the initial run of non-special characters.
5516 ;; If no special characters, we're almost done.
5520 j)
5522 result
5543 ;; Found "[^". Insert a `\0' character
5544 ;; (which cannot happen in a filename)
5545 ;; into the character class, so that `^'
5546 ;; is not the first character after `[',
5547 ;; and thus non-special in a regexp.
5552 ;; I don't think `]' can appear in a
5553 ;; character class in a wildcard, but
5554 ;; let's be general here.
5561 i
5574 ;; Shell wildcards should match the entire filename,
5575 ;; not its part. Make the regexp say so.
5577 \f
5580 "Switches for `list-directory' to pass to `ls' for brief listing."
5586 "Switches for `list-directory' to pass to `ls' for verbose listing."
5591 "Expand wildcard pattern PATTERN.
5592 This returns a list of file names which match the pattern.
5594 If PATTERN is written as an absolute file name,
5595 the values are absolute also.
5597 If PATTERN is written as a relative file name, it is interpreted
5598 relative to the current default directory, `default-directory'.
5599 The file names returned are normally also relative to the current
5600 default directory. However, if FULL is non-nil, they are absolute."
5604 ;; A list of all dirs that DIRPART specifies.
5605 ;; This can be more than one dir
5606 ;; if DIRPART contains wildcards.
5610 dirpart)))
5614 contents)
5619 ;; Filter out "." and ".."
5624 name))
5631 this-dir-contents)
5632 this-dir-contents)
5633 contents))))
5635 contents)))
5637 ;; Let Tramp know that `file-expand-wildcards' does not need an advice.
5641 "Display a list of files in or matching DIRNAME, a la `ls'.
5642 DIRNAME is globbed by the shell if necessary.
5643 Prefix arg (second arg if noninteractive) means supply -l switch to `ls'.
5644 Actions controlled by variables `list-directory-brief-switches'
5645 and `list-directory-verbose-switches'."
5649 nil default-directory nil)
5650 pfx)))
5652 list-directory-brief-switches))
5653 buffer)
5665 ;; Finishing with-output-to-temp-buffer seems to clobber default-directory.
5673 "Quote characters special to the shell in PATTERN, leave wildcards alone.
5675 PATTERN is assumed to represent a file-name wildcard suitable for the
5676 underlying filesystem. For Unix and GNU/Linux, each character from the
5678 the parts of the pattern which don't include wildcard characters are
5679 quoted with double quotes.
5682 on Windows), so PATTERN can use them to quote wildcard characters that
5683 need to be passed verbatim to shell commands."
5687 ;; DOS/Windows don't allow `"' in file names. So if the
5688 ;; argument has quotes, we can safely assume it is already
5689 ;; quoted by the caller.
5691 ;; We quote [&()#$'] in case their shell is a port of a
5692 ;; Unixy shell. We quote [,=+] because stock DOS and
5693 ;; Windows shells require that in some cases, such as
5694 ;; passing arguments to batch files that use positional
5695 ;; arguments like %1.
5697 pattern
5700 end)
5717 pattern))))
5724 "Program to get the amount of free space on a file system.
5725 We assume the output has the format of `df'.
5726 The value of this variable must be just a command name or file name;
5727 if you want to specify options, use `directory-free-space-args'.
5729 A value of nil disables this feature.
5731 If the function `file-system-info' is defined, it is always used in
5732 preference to the program given by this variable."
5738 "Options to use when running `directory-free-space-program'."
5743 "Return the amount of free space on directory DIR's file system.
5744 The return value is a string describing the amount of free
5745 space (normally, the number of free 1KB blocks).
5747 This function calls `file-system-info' if it is available, or
5748 invokes the program specified by `directory-free-space-program'
5749 and `directory-free-space-args'. If the system call or program
5750 is unsuccessful, or if DIR is a remote directory, this function
5751 returns nil."
5753 ;; Try to find the number of free blocks. Non-Posix systems don't
5754 ;; always have df, but might have an equivalent system call.
5763 ;; Avoid failure if the default directory does
5764 ;; not exist (Bug#2631, Bug#3911).
5767 nil t nil
5768 directory-free-space-args
5769 dir)
5771 ;; Assume that the "available" column is before the
5772 ;; "capacity" column. Find the "%" and scan backward.
5776 "[[:space:]]+[^[:space:]]+%[^%]*$"
5783 ;; The following expression replaces `dired-move-to-filename-regexp'.
5787 ;; In some locales, month abbreviations are as short as 2 letters,
5788 ;; and they can be followed by ".".
5789 ;; In Breton, a month name can include a quote character.
5802 s "+"
5805 ;; Japanese MS-Windows ls-lisp has one-digit months, and
5806 ;; omits the Kanji characters after month and day-of-month.
5807 ;; On Mac OS X 10.3, the date format in East Asian locales is
5808 ;; day-of-month digits followed by month digits.
5814 ;; The "[0-9]" below requires the previous column to end in a digit.
5815 ;; This avoids recognizing `1 may 1997' as a date in the line:
5816 ;; -r--r--r-- 1 may 1997 1168 Oct 19 16:49 README
5818 ;; The "[BkKMGTPEZY]?" below supports "ls -alh" output.
5820 ;; For non-iso date formats, we add the ".*" in order to find
5821 ;; the last possible match. This avoids recognizing
5822 ;; `jservice 10 1024' as a date in the line:
5823 ;; drwxr-xr-x 3 jservice 10 1024 Jul 2 1997 esg-host
5825 ;; vc dired listings provide the state or blanks between file
5826 ;; permissions and date. The state is always surrounded by
5827 ;; parantheses:
5828 ;; -rw-r--r-- (modified) 2005-10-22 21:25 files.el
5829 ;; This is not supported yet.
5834 "Regular expression to match up to the file name in a directory listing.
5835 The default value is designed to recognize dates and times
5840 ;; insert-directory
5841 ;; - must insert _exactly_one_line_ describing FILE if WILDCARD and
5842 ;; FULL-DIRECTORY-P is nil.
5843 ;; The single line of output must display FILE's name as it was
5844 ;; given, namely, an absolute path name.
5845 ;; - must insert exactly one line for each file if WILDCARD or
5846 ;; FULL-DIRECTORY-P is t, plus one optional "total" line
5847 ;; before the file lines, plus optional text after the file lines.
5848 ;; Lines are delimited by "\n", so filenames containing "\n" are not
5849 ;; allowed.
5850 ;; File lines should display the basename.
5851 ;; - must be consistent with
5852 ;; - functions dired-move-to-filename, (these two define what a file line is)
5853 ;; dired-move-to-end-of-filename,
5854 ;; dired-between-files, (shortcut for (not (dired-move-to-filename)))
5855 ;; dired-insert-headerline
5856 ;; dired-after-subdir-garbage (defines what a "total" line is)
5857 ;; - variable dired-subdir-regexp
5858 ;; - may be passed "--dired" as the first argument in SWITCHES.
5859 ;; Filename handlers might have to remove this switch if their
5860 ;; "ls" command does not support it.
5862 "Insert directory listing for FILE, formatted according to SWITCHES.
5863 Leaves point after the inserted text.
5864 SWITCHES may be a string of options, or a list of strings
5865 representing individual options.
5866 Optional third arg WILDCARD means treat FILE as shell wildcard.
5867 Optional fourth arg FULL-DIRECTORY-P means file is a directory and
5868 switches do not contain `d', so that a full listing is expected.
5870 This works by running a directory listing program
5871 whose name is in the variable `insert-directory-program'.
5872 If WILDCARD, it also runs the shell specified by `shell-file-name'.
5874 When SWITCHES contains the long `--dired' option, this function
5875 treats it specially, for the sake of dired. However, the
5876 normally equivalent short `-D' option is just passed on to
5877 `insert-directory-program', as any other option."
5878 ;; We need the directory in order to find the right handler.
5883 wildcard full-directory-p)
5886 ;; Read the actual directory using `insert-directory-program'.
5887 ;; RESULT gets the status code.
5889 ;; putting text property `dired-filename, decode one
5890 ;; bunch by one to preserve that property.
5892 ;; This is to control encoding the arguments in call-process.
5896 default-file-name-coding-system))))
5899 ;; Run ls in the directory part of the file pattern
5900 ;; using the last component as argument.
5906 ;; NB since switches is passed to the shell, be
5907 ;; careful of malicious values, eg "-l;reboot".
5908 ;; See eg dired-safe-switches-p.
5910 shell-file-name nil t nil
5911 "-c"
5913 ""
5915 insert-directory-program
5916 " -d "
5918 switches
5920 " -- "
5921 ;; Quote some characters that have
5922 ;; special meanings in shells; but
5923 ;; don't quote the wildcards--we want
5924 ;; them to be special. We also
5925 ;; currently don't quote the quoting
5926 ;; characters in case people want to
5927 ;; use them explicitly to quote
5928 ;; wildcard characters.
5930 ;; SunOS 4.1.3, SVr4 and others need the "." to list the
5931 ;; directory if FILE is a symbolic link.
5938 insert-directory-program nil t nil
5942 ;; Split the switches at any spaces so we can
5943 ;; pass separate options as separate args.
5945 ;; Avoid lossage if FILE starts with `-'.
5953 file))))))))
5955 ;; If we got "//DIRED//" in the output, it means we got a real
5956 ;; directory listing, even if `ls' returned nonzero.
5957 ;; So ignore any errors.
5970 ;; The first time ls returns an error,
5971 ;; find the version numbers of ls,
5972 ;; and set insert-directory-ls-version
5973 ;; to > if it is more than 5.2.1, < if it is less, nil if it
5974 ;; is equal or if the info cannot be obtained.
5975 ;; (That can mean it isn't GNU ls.)
5985 comparison)
6001 ;; For GNU ls versions 5.2.2 and up, ignore minor errors.
6005 ;; If `insert-directory-program' failed, signal an error.
6007 ;; Delete the error message it may have output.
6009 ;; On non-Posix systems, we cannot open a directory, so
6010 ;; don't even try, because that will always result in
6011 ;; the ubiquitous "Access denied". Instead, show the
6012 ;; command line so the user can try to guess what went wrong.
6017 insert-directory-program
6019 file result)
6020 ;; Unix. Access the file to get a suitable error.
6027 ;; The following overshoots by one line for an empty
6028 ;; directory listed with "--dired", but without "-a"
6029 ;; switch, where the ls output contains a
6030 ;; "//DIRED-OPTIONS//" line, but no "//DIRED//" line.
6031 ;; We take care of that case later.
6039 error-lines)
6040 ;; Find all the lines that are error messages,
6041 ;; and record the bounds of each one.
6048 ;; Now read the numeric positions of file names.
6055 error-lines))
6058 error-lines)))
6060 ;; End is followed by \n or by " -> ".
6062 ;; It seems that we can't trust ls's output as to
6063 ;; byte positions of filenames.
6069 ;; Take care of the case where the ls output contains a
6070 ;; "//DIRED-OPTIONS//"-line, but no "//DIRED//"-line
6071 ;; and we went one line too far back (see above).
6076 ;; Now decode what read if necessary.
6078 file-name-coding-system
6079 default-file-name-coding-system
6081 coding-no-eol
6082 val pos)
6086 ;; If no coding system is specified or detection is
6087 ;; requested, detect the coding.
6101 ;; Force no eol conversion on a file name, so
6102 ;; that CR is preserved.
6110 ;; Try to insert the amount of free space.
6113 ;; First find the line to put it on.
6117 ;; Replace "total" with "used", to avoid confusion.
6123 "Convert `ls --dired' file name position value POS to a buffer position.
6124 File name position values returned in ls --dired output
6125 count only stdout; they don't count the error messages sent to stderr.
6126 So this function converts to them to real buffer positions.
6127 ERROR-LINES is a list of buffer positions of error message lines,
6128 of the form (START END)."
6132 pos)
6136 "Insert directory listing for FILE, formatted according to SWITCHES.
6138 Like `insert-directory', but if FILE does not exist, it inserts a
6139 message to that effect instead of signaling an error."
6142 ;; Simulate the message printed by `ls'.
6146 "Functions to call with no arguments to query about killing Emacs.
6147 If any of these functions returns nil, killing Emacs is cancelled.
6148 `save-buffers-kill-emacs' calls these functions, but `kill-emacs',
6152 "How to ask for confirmation when leaving Emacs.
6153 If nil, the default, don't ask at all. If the value is non-nil, it should
6154 be a predicate function such as `yes-or-no-p'."
6162 "Offer to save each buffer, then kill this Emacs process.
6163 With prefix ARG, silently save all file-visiting buffers, then kill."
6172 ;; process-list is not defined on MSDOS.
6174 active)
6183 ;; Query the user for other things, perhaps.
6190 "Offer to save each buffer, then kill the current connection.
6191 If the current frame has no client, kill Emacs itself.
6193 With prefix ARG, silently save all file-visiting buffers, then kill.
6195 If emacsclient was started with a list of filenames to edit, then
6196 only these files will be asked to be saved."
6201 \f
6202 ;; We use /: as a prefix to "quote" a file name
6203 ;; so that magic file name handlers will not apply to it.
6207 file-name-handler-alist))
6209 ;; We depend on being the last handler on the list,
6210 ;; so that anything else which does need handling
6211 ;; has been handled already.
6212 ;; So it is safe for us to inhibit *all* magic file name handlers.
6221 default-directory))
6222 ;; Get a list of the indices of the args which are file names.
6225 ;; The first six are special because they
6226 ;; return a file name. We want to include the /:
6227 ;; in the return value.
6228 ;; So just avoid stripping it in the first place.
6235 ;; `identity' means just return the first arg
6236 ;; not stripped of its quoting.
6238 ;; `add' means add "/:" to the result.
6241 ;; `unquote-then-quote' means set buffer-file-name
6242 ;; temporarily to unquoted filename.
6244 ;; List the arguments which are filenames.
6252 ;; For all other operations, treat the first argument only
6253 ;; as the file name.
6255 method
6256 ;; Copy ARGUMENTS so we can replace elements in it.
6260 ;; Strip off the /: from the file names that have it.
6268 "/"
6285 \f
6286 ;; Symbolic modes and read-file-modes.
6289 "Convert CHAR to a numeric bit-mask for extracting mode bits.
6290 CHAR is in [ugoa] and represents the category of users (Owner, Group,
6291 Others, or All) for whom to produce the mask.
6292 The bit-mask that is returned extracts from mode bits the access rights
6293 for the specified category of users."
6301 "Convert CHAR to a numeric value of mode bits.
6302 CHAR is in [rwxXstugo] and represents symbolic access permissions.
6303 If CHAR is in [Xugo], the value is taken from FROM (or 0 if omitted)."
6310 ;; Rights relative to the previous file modes.
6321 "Convert a symbolic mode string specification to an equivalent number.
6323 WHO-MASK is the bit-mask specifying the category of users to which to
6324 apply the access permissions. See `file-modes-char-to-who'.
6325 FROM (or 0 if nil) gives the mode bits on which to base permissions if
6326 RIGHTS request to add, remove, or set permissions based on existing ones,
6333 char-right)
6340 num-rights
6344 op char-right)))
6345 num-rights))
6348 "Convert symbolic file modes to numeric file modes.
6349 MODES is the string to convert, it should match
6352 notation.
6353 FROM (or 0 if nil) gives the mode bits on which to base permissions if
6354 MODES request to add, remove, or set permissions based on existing ones,
6368 num-who num-modes)
6371 num-modes)))
6374 "Read file modes in octal or symbolic notation and return its numeric value.
6375 PROMPT is used as the prompt, default to `File modes (octal or symbolic): '.
6376 ORIG-FILE is the name of a file on whose mode bits to base returned
6377 permissions if what user types requests to add, remove, or set permissions
6393 nil nil default)))
6399 \f
6400 ;; Trashcan handling.
6402 "Directory for `move-file-to-trash' to move files and directories to.
6403 This directory is only used when the function `system-move-file-to-trash'
6404 is not defined.
6405 Relative paths are interpreted relative to `default-directory'.
6406 If the value is nil, Emacs uses a freedesktop.org-style trashcan."
6416 "Move the file (or directory) named FILENAME to the trash.
6417 When `delete-by-moving-to-trash' is non-nil, this function is
6418 called by `delete-file' and `delete-directory' instead of
6419 deleting files outright.
6421 If the function `system-move-file-to-trash' is defined, call it
6422 with FILENAME as an argument.
6423 Otherwise, if `trash-directory' is non-nil, move FILENAME to that
6424 directory.
6425 Otherwise, trash FILENAME using the freedesktop.org conventions,
6426 like the GNOME, KDE and XFCE desktop environments. Emacs only
6430 ;; If `trash-directory' is non-nil, move the file there.
6434 trash-dir)))
6435 ;; We can't trash a parent directory of trash-directory.
6438 trash-dir filename))
6441 ;; Ensure that the trashed file-name is unique.
6448 ;; If `system-move-file-to-trash' is defined, use it.
6451 ;; Otherwise, use the freedesktop.org method, as specified at
6452 ;; http://freedesktop.org/wiki/Specifications/trash-spec
6463 ;; Check if we have permissions to delete.
6467 ;; The trashed file cannot be the trash dir or its parent.
6470 trash-files-dir filename))
6473 trash-info-dir filename))
6475 ;; Ensure that the trash directory exists; otherwise, create it.
6484 ;; Try to move to trash with .trashinfo undo information
6489 ;; Perform url-encoding on FN. For compatibility with
6490 ;; other programs (e.g. XFCE Thunar), allow literal "/"
6491 ;; for path separators.
6496 ?n ?o ?p ?q ?r ?s ?t ?u ?v ?w ?x ?y ?z ?A
6497 ?B ?C ?D ?E ?F ?G ?H ?I ?J ?K ?L ?M ?N ?O
6510 fn))
6515 ;; Attempt to make .trashinfo file, trying up to 5
6516 ;; times. The .trashinfo file is opened with O_EXCL,
6517 ;; as per trash-spec 0.7, even if that can be a problem
6518 ;; on old NFS versions...
6522 trash-files-dir))
6524 success info-fn)
6529 trash-info-dir))
6537 ;; Uniqify new-fn. (Some file managers do not
6538 ;; like Emacs-style backup file names---e.g. bug
6539 ;; 170956 in Konqueror bug tracker.)
6544 ;; Finally, try to move the file to the trashcan.
6548 \f
6573 ;;; files.el ends here