| blob | 045eeaf154cf42b47cdc1a471c2a0972dcfcfd34 |
1 ;;; files.el --- file input and output commands for Emacs -*- lexical-binding:t -*-
3 ;; Copyright (C) 1985-1987, 1992-2015 Free Software Foundation, Inc.
5 ;; Maintainer: emacs-devel@gnu.org
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:
34 "Backups of edited data files."
38 "Finding files."
43 "Non-nil means delete auto-save file when a buffer is saved or killed.
45 Note that the auto-save file will not be deleted if the buffer is killed
46 when it has unsaved changes."
51 nil
52 "Alist of abbreviations for file directories.
53 A list of elements of the form (FROM . TO), each meaning to replace
54 FROM with TO when it appears in a directory name. This replacement is
55 done when setting up the default directory of a newly visited file.
57 FROM is matched against directory names anchored at the first
61 FROM and TO should be equivalent names, which refer to the
62 same directory. Do not use `~' in the TO strings;
63 they should be ordinary absolute directory names.
65 Use this feature when you have directories which you normally refer to
66 via absolute symbolic links. Make TO the name of the link, and FROM
67 the name it is linked to."
76 "Non-nil means make a backup of a file the first time it is saved.
77 This can be done by renaming the file or by copying.
79 Renaming means that Emacs renames the existing file so that it is a
80 backup file, then writes the buffer into a new file. Any other names
81 that the old file had will now refer to the backup file. The new file
82 is owned by you and its group is defaulted.
84 Copying means that Emacs copies the existing file into the backup
85 file, then writes the buffer on top of the existing file. Any other
86 names that the old file had will now refer to the new (edited) file.
87 The file's owner and group are unchanged.
89 The choice of renaming or copying is controlled by the variables
90 `backup-by-copying', `backup-by-copying-when-linked',
91 `backup-by-copying-when-mismatch' and
92 `backup-by-copying-when-privileged-mismatch'. See also `backup-inhibited'."
96 ;; Do this so that local variables based on the file name
97 ;; are not overridden by the major mode.
99 "If non-nil, backups will be inhibited.
100 This variable is intended for use by making it local to a buffer,
105 "Non-nil means always use copying to create backup files.
106 See documentation of variable `make-backup-files'."
111 "Non-nil means use copying to create backups for files with multiple names.
112 This causes the alternate names to refer to the latest version as edited.
113 This variable is relevant only if `backup-by-copying' is nil."
118 "Non-nil means create backups by copying if this preserves owner or group.
119 Renaming may still be used (subject to control of other variables)
120 when it would not result in changing the owner or group of the file;
121 that is, for files which are owned by you and whose group matches
122 the default for a new file created there by you.
123 This variable is relevant only if `backup-by-copying' is nil."
130 "Non-nil means create backups by copying to preserve a privileged owner.
131 Renaming may still be used (subject to control of other variables)
132 when it would not result in changing the owner of the file or if the owner
133 has a user id greater than the value of this variable. This is useful
134 when low-numbered uid's are used for special system users (such as root)
135 that must maintain ownership of certain files.
136 This variable is relevant only if `backup-by-copying' and
137 `backup-by-copying-when-mismatch' are nil."
142 "Predicate that looks at a file name and decides whether to make backups.
146 "Non-nil in a buffer means always offer to save buffer on exit.
147 Do so even if the buffer is not visiting a file.
148 Automatically local in all buffers."
155 "Non-nil means find a file under alternative names, in existing buffers.
156 This means if any existing buffer is visiting the file you want
157 under another name, you get the existing buffer instead of a new buffer."
162 "Non-nil means visiting a file uses its truename as the visited-file name.
163 That is, the buffer visiting the file has the truename as the
164 value of `buffer-file-name'. The truename of a file is found by
165 chasing all links both at the file level and at the levels of the
166 containing directories."
172 "Specify which files should be reverted without query.
173 The value is a list of regular expressions.
174 If the file name matches one of these regular expressions,
175 then `revert-buffer' reverts the file without querying
176 if the file has changed on disk and you have not edited the buffer."
181 "The device number and file number of the file visited in the current buffer.
182 The value is a list of the form (FILENUM DEVNUM).
183 This pair of numbers uniquely identifies the file.
197 "The directory for writing small temporary files.
198 If non-nil, this directory is used instead of `temporary-file-directory'
199 by programs that create small temporary files. This is for systems that
200 have fast storage with limited space, such as a RAM disk."
205 ;; The system null device. (Should reference NULL_DEVICE from C.)
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 "Whether to allow breaking hardlinks when saving files.
254 If non-nil, then when saving a file that exists under several
255 names \(i.e., has multiple hardlinks), break the hardlink
256 associated with `buffer-file-name' and write to a new file, so
257 that the other instances of the file are not affected by the
258 save.
260 If `buffer-file-name' refers to a symlink, do not break the symlink.
262 Unlike `file-precious-flag', `break-hardlink-on-save' is not advisory.
263 For example, if the directory in which a file is being saved is not
264 itself writable, then error instead of saving in some
265 hardlink-nonbreaking way.
267 See also `backup-by-copying' and `backup-by-copying-when-linked'."
273 "Control use of version numbers for backup files.
274 When t, make numeric backup versions unconditionally.
275 When nil, make them for files that have some already.
276 The value `never' means do not make them."
286 "When cleaning directory, number of versions to keep."
292 "If t, delete excess backup versions silently.
293 If nil, ask confirmation. Any other value prevents any trimming."
300 "Number of oldest versions to keep when a new numbered backup is made."
306 "Number of newest versions to keep when a new numbered backup is made.
307 Includes the new backup. Must be > 0"
313 "Whether to add a newline automatically at the end of the file.
315 A value of t means do this only when the file is about to be saved.
316 A value of `visit' means do this right after the file is visited.
317 A value of `visit-save' means do it at both of those times.
318 Any other non-nil value means ask user whether to add a newline, when saving.
319 A value of nil means don't add newlines.
321 Certain major modes set this locally to the value obtained
322 from `mode-require-final-newline'."
332 "Whether to add a newline at end of file, in certain major modes.
333 Those modes set `require-final-newline' to this value when you enable them.
334 They do so because they are often used for files that are supposed
335 to end in newlines, and the question is how to arrange that.
337 A value of t means do this only when the file is about to be saved.
338 A value of `visit' means do this right after the file is visited.
339 A value of `visit-save' means do it at both of those times.
340 Any other non-nil value means ask user whether to add a newline, when saving.
342 A value of nil means do not add newlines. That is a risky choice in this
343 variable since this value is used for modes for files that ought to have
344 final newlines. So if you set this to nil, you must explicitly check and
345 add a final newline, whenever you save a file that really needs one."
355 "Non-nil says by default do auto-saving of every file-visiting buffer."
361 ;; Don't put "\\2" inside expand-file-name, since it will be
362 ;; transformed to "/2" on DOS/Windows.
364 "Transforms to apply to buffer file name before making auto-save file name.
365 Each transform is a list (REGEXP REPLACEMENT UNIQUIFY):
366 REGEXP is a regular expression to match against the file name.
367 If it matches, `replace-match' is used to replace the
368 matching part with REPLACEMENT.
369 If the optional element UNIQUIFY is non-nil, the auto-save file name is
370 constructed by taking the directory part of the replaced file-name,
371 concatenated with the buffer file name with all directory separators
372 changed to `!' to prevent clashes. This will not work
373 correctly if your filesystem truncates the resulting name.
375 All the transforms in the list are tried, in the order they are listed.
376 When one transform applies, its result is final;
377 no further transforms are tried.
379 The default value is set up to put the auto-save file into the
380 temporary directory (see the variable `temporary-file-directory') for
381 editing a remote file.
383 On MS-DOS filesystems without long names this variable is always
384 ignored."
392 "Non-nil means save word abbrevs too when files are saved.
393 If `silently', don't ask the user before saving."
398 "Non-nil means allow `find-file' to visit directories.
399 To visit the directory, `find-file' runs `find-directory-functions'."
404 "List of functions to try in sequence to visit a directory.
405 Each function is called with the directory name as the sole argument
406 and should return either a buffer or nil."
410 ;; FIXME: also add a hook for `(thing-at-point 'filename)'
412 "List of functions to try in sequence to get a file name at point.
413 Each function should return either nil or a file name found at the
414 location of point in the current buffer."
418 ;;;It is not useful to make this a local variable.
419 ;;;(put 'find-file-not-found-hooks 'permanent-local t)
423 "List of functions to be called for `find-file' on nonexistent file.
424 These functions are called as soon as the error is detected.
425 Variable `buffer-file-name' is already set up.
428 ;;;It is not useful to make this a local variable.
429 ;;;(put 'find-file-hooks 'permanent-local t)
432 "List of functions to be called after a buffer is loaded from a file.
433 The buffer's local variables (if any) will have been processed before the
434 functions are called."
442 "List of functions to be called before writing out a buffer to a file.
443 If one of them returns non-nil, the file is considered already written
444 and the rest are not called.
445 These hooks are considered to pertain to the visited file.
446 So any buffer-local binding of this variable is discarded if you change
448 change the major mode.
450 This hook is not run if any of the functions in
451 `write-contents-functions' returns non-nil. Both hooks pertain
452 to how to save a buffer to file, for instance, choosing a suitable
453 coding system and setting mode bits. (See Info
454 node `(elisp)Saving Buffers'.) To perform various checks or
466 "List of functions to be called before writing out a buffer to a file.
467 If one of them returns non-nil, the file is considered already written
468 and the rest are not called and neither are the functions in
469 `write-file-functions'.
471 This variable is meant to be used for hooks that pertain to the
472 buffer's contents, not to the particular visited file; thus,
473 `set-visited-file-name' does not clear this variable; but changing the
474 major mode does clear it.
476 For hooks that _do_ pertain to the particular visited file, use
477 `write-file-functions'. Both this variable and
478 `write-file-functions' relate to how a buffer is saved to file.
479 To perform various checks or updates before the buffer is saved,
484 "Control use of local variables in files you visit.
485 The value can be t, nil, :safe, :all, or something else.
487 A value of t means file local variables specifications are obeyed
488 if all the specified variable values are safe; if any values are
489 not safe, Emacs queries you, once, whether to set them all.
490 \(When you say yes to certain values, they are remembered as safe.)
492 :safe means set the safe variables, and ignore the rest.
493 :all means set all variables, whether safe or not.
494 (Don't set it permanently to :all.)
495 A value of nil means always ignore the file local variables.
497 Any other value means always query you once whether to set them all.
498 \(When you say yes to certain values, they are remembered as safe, but
501 This variable also controls use of major modes specified in
502 a -*- line.
505 always obeys file local variable specifications and the -*- line,
506 and ignores this variable."
507 :risky t
516 "Non-nil means enable use of directory-local variables.
517 Some modes may wish to set this to nil to prevent directory-local
520 ;; This is an odd variable IMO.
521 ;; You might wonder why it is needed, when we could just do:
522 ;; (set (make-local-variable 'enable-local-variables) nil)
523 ;; These two are not precisely the same.
524 ;; Setting this variable does not cause -*- mode settings to be
525 ;; ignored, whereas setting enable-local-variables does.
526 ;; Only three places in Emacs use this variable: tar and arc modes,
527 ;; and rmail. The first two don't need it. They already use
528 ;; inhibit-local-variables-regexps, which is probably enough, and
529 ;; could also just set enable-local-variables locally to nil.
530 ;; Them setting it has the side-effect that dir-locals cannot apply to
531 ;; eg tar files (?). FIXME Is this appropriate?
532 ;; AFAICS, rmail is the only thing that needs this, and the only
533 ;; reason it uses it is for BABYL files (which are obsolete).
534 ;; These contain "-*- rmail -*-" in the first line, which rmail wants
535 ;; to respect, so that find-file on a BABYL file will switch to
536 ;; rmail-mode automatically (this is nice, but hardly essential,
537 ;; since most people are used to explicitly running a command to
538 ;; access their mail; M-x gnus etc). Rmail files may happen to
539 ;; contain Local Variables sections in messages, which Rmail wants to
540 ;; ignore. So AFAICS the only reason this variable exists is for a
541 ;; minor convenience feature for handling of an obsolete Rmail file format.
543 "Like `enable-local-variables' but meant for buffer-local bindings.
544 The meaningful values are nil and non-nil. The default is non-nil.
545 If a major mode sets this to nil, buffer-locally, then any local
546 variables list in a file visited in that mode will be ignored.
548 This variable does not affect the use of major modes specified
553 The value can be t, nil or something else.
554 A value of t means obey `eval' variables.
555 A value of nil means ignore them; anything else means query."
556 :risky t
563 "Non-nil means buffers visiting files read-only do so in view mode.
564 In fact, this means that all read-only buffers normally have
565 View mode enabled, including buffers that are read-only because
566 you visit a file you cannot alter, and buffers you make read-only
572 "History list of file names entered in the minibuffer.
574 Maximum length of the history list is determined by the value
578 "If non-nil, avoid messages when saving files.
579 Error-related messages will still be printed, but all other
582 \f
585 "Provides support for ange-ftp host name completion.
586 Runs the usual ange-ftp hook, but only for completion operations."
587 ;; Having this here avoids the need to load ange-ftp when it's not
588 ;; really in use.
594 inhibit-file-name-handlers)))
602 "Convert a standard file's name to something suitable for the OS.
603 This means to guarantee valid names and perhaps to canonicalize
604 certain patterns.
606 FILENAME should be an absolute file name since the conversion rules
607 sometimes vary depending on the position in the file name. E.g. c:/foo
608 is a valid DOS file name, but c:/bar/c:/foo is not.
610 This function's standard definition is trivial; it just returns
611 the argument. However, on Windows and DOS, replace invalid
612 characters. On DOS, make sure to obey the 8.3 limitations.
613 In the native Windows build, turn Cygwin names into native names,
614 and also turn slashes into backslashes if the shell requires it (see
615 `w32-shell-dos-semantics').
617 See Info node `(elisp)Standard File Names' for more details."
622 ;; Replace invalid filename characters with !
626 name))
634 "Read directory name, prompting with PROMPT and completing in directory DIR.
635 Value is not expanded---you must call `expand-file-name' yourself.
636 Default name to DEFAULT-DIRNAME if user exits with the same
637 non-empty string that was inserted by this function.
638 (If DEFAULT-DIRNAME is omitted, DIR combined with INITIAL is used,
639 or just DIR if INITIAL is nil.)
640 If the user exits with an empty minibuffer, this function returns
641 an empty string. (This can only happen if the user erased the
642 pre-inserted contents or if `insert-default-directory' is nil.)
643 Fourth arg MUSTMATCH non-nil means require existing directory's name.
644 Non-nil and non-t means also require confirmation after completion.
645 Fifth arg INITIAL specifies text to start with.
646 DIR should be an absolute directory name. It defaults to
647 the value of `default-directory'."
652 dir))
653 mustmatch initial
656 \f
658 "Show the current default directory."
663 "Value of the CDPATH environment variable, as a list.
667 "Explode a search path into a list of directory names.
668 Directories are separated by `path-separator' (which is colon in
669 GNU and Unix systems). Substitute environment variables into the
670 resulting list of directory names. For an empty path element (i.e.,
671 a leading or trailing separator, or two adjacent separators), return
672 nil (meaning `default-directory') as the associated list element."
680 "Change current directory to given absolute file name DIR."
681 ;; Put the name into directory syntax now,
682 ;; because otherwise expand-file-name may give some bad results.
684 ;; We used to additionally call abbreviate-file-name here, for an
685 ;; unknown reason. Problem is that most buffers are setup
686 ;; without going through cd-absolute and don't call
687 ;; abbreviate-file-name on their default-directory, so the few that
688 ;; do end up using a superficially different directory.
700 "Make DIR become the current buffer's default directory.
701 If your environment includes a `CDPATH' variable, try each one of
702 that list of directories (separated by occurrences of
703 `path-separator') when resolving a relative directory name.
704 The path separator is colon in GNU and GNU-like systems."
707 ;; FIXME: There's a subtle bug in the completion below. Seems linked
708 ;; to a fundamental difficulty of implementing `predicate' correctly.
709 ;; The manifestation is that TAB may list non-directories in the case where
710 ;; those files also correspond to valid directories (if your cd-path is (A/
711 ;; B/) and you have A/a a file and B/a a directory, then both `a' and `a/'
712 ;; will be listed as valid completions).
713 ;; This is because `a' (listed because of A/a) is indeed a valid choice
714 ;; (which will lead to the use of B/a).
719 cd-path nil))
728 default-directory default-directory
729 t))))
739 "Return non-nil if NAME ends with a slash character."
744 "Return all files under DIR that have file names matching MATCH (a regexp).
746 and alphabetical order.
747 If INCLUDE-DIRECTORIES, also include directories that have matching names."
750 ;; When DIR is "/", remote file names like "/method:" could
751 ;; also be offered. We shall suppress them.
759 ;; Don't follow symlinks to other directories.
763 full-file match include-directories))))
772 "Load the Lisp file named FILE."
773 ;; This is a case where .elc makes a lot of sense.
780 "Search for FILENAME through PATH.
781 If found, return the absolute file name of FILENAME; otherwise
782 return nil.
783 PATH should be a list of directories to look in, like the lists in
784 `exec-path' or `load-path'.
785 If SUFFIXES is non-nil, it should be a list of suffixes to append to
788 If non-nil, PREDICATE is used instead of `file-readable-p'.
790 This function will normally skip directories, so if you want it to find
791 directories, make sure the PREDICATE function returns `dir-ok' for them.
793 PREDICATE can also be an integer to pass to the `access' system call,
794 in which case file-name handlers are ignored. This usage is deprecated.
795 For compatibility, PREDICATE can also be one of the symbols
796 `executable', `readable', `writable', or `exists', or a list of
797 one or more of those symbols."
808 "Do completion for file names passed to `locate-file'."
811 ;; FIXME: maybe we should use completion-file-name-table instead,
812 ;; tho at least for `load', the arg is passed through
813 ;; substitute-in-file-name for historical reasons.
823 ;; If we have files like "foo.el" and "foo.elc", we could load one of
824 ;; them with "foo.el", "foo.elc", or "foo", where just "foo" is the
825 ;; preferred way. So if we list all 3, that gives a lot of redundant
826 ;; entries for the poor soul looking just for "foo". OTOH, sometimes
827 ;; the user does want to pay attention to the extension. We try to
828 ;; diffuse this tension by stripping the suffix, except when the
829 ;; result is a single element (i.e. usually we only list "foo" unless
830 ;; it's the only remaining element in the list, in which case we do
831 ;; list "foo", "foo.elc" and "foo.el").
842 string-file dir))
847 ;; Switching from names to names+fullnames creates a non-monotonicity
848 ;; which can cause problems with things like partial-completion.
849 ;; To minimize the problem, filter out completion-regexp-list, so that
850 ;; M-x load-library RET t/x.e TAB finds some files. Also remove elements
851 ;; from `names' which only matched `string' when they still had
852 ;; their suffix.
854 ;; Remove duplicates of the first element, so that we can easily check
855 ;; if `names' really only contains a single element.
858 ;; There's no more than one matching non-suffixed element, so expand
859 ;; the list by adding the suffixed elements as well.
862 string-dir names string-file pred action)))))
865 "Do completion for file names passed to `locate-file'.
866 PATH-AND-SUFFIXES is a pair of lists, (DIRECTORIES . SUFFIXES)."
870 string nil action))
874 "Regexp of directory names which stop the search in `locate-dominating-file'.
875 Any directory whose name matches this regexp will be treated like
876 a kind of root directory by `locate-dominating-file' which will stop its search
877 when it bumps into it.
878 The default regexp prevents fruitless and time-consuming attempts to find
879 special files in directories in which filenames are interpreted as hostnames,
882 ;; (defun locate-dominating-files (file regexp)
883 ;; "Look up the directory hierarchy from FILE for a file matching REGEXP.
884 ;; Stop at the first parent where a matching file is found and return the list
885 ;; of files that that match in this directory."
886 ;; (catch 'found
887 ;; ;; `user' is not initialized yet because `file' may not exist, so we may
888 ;; ;; have to walk up part of the hierarchy before we find the "initial UID".
889 ;; (let ((user nil)
890 ;; ;; Abbreviate, so as to stop when we cross ~/.
891 ;; (dir (abbreviate-file-name (file-name-as-directory file)))
892 ;; files)
893 ;; (while (and dir
894 ;; ;; As a heuristic, we stop looking up the hierarchy of
895 ;; ;; directories as soon as we find a directory belonging to
896 ;; ;; another user. This should save us from looking in
897 ;; ;; things like /net and /afs. This assumes that all the
898 ;; ;; files inside a project belong to the same user.
899 ;; (let ((prev-user user))
900 ;; (setq user (nth 2 (file-attributes dir)))
901 ;; (or (null prev-user) (equal user prev-user))))
902 ;; (if (setq files (condition-case nil
903 ;; (directory-files dir 'full regexp 'nosort)
904 ;; (error nil)))
905 ;; (throw 'found files)
906 ;; (if (equal dir
907 ;; (setq dir (file-name-directory
908 ;; (directory-file-name dir))))
909 ;; (setq dir nil))))
910 ;; nil)))
913 "Look up the directory hierarchy from FILE for a directory containing NAME.
914 Stop at the first parent directory containing a file NAME,
915 and return the directory. Return nil if not found.
916 Instead of a string, NAME can also be a predicate taking one argument
917 \(a directory) and returning a non-nil value if that directory is the one for
918 which we're looking."
919 ;; We used to use the above locate-dominating-files code, but the
920 ;; directory-files call is very costly, so we're much better off doing
921 ;; multiple calls using the code in here.
922 ;;
923 ;; Represent /home/luser/foo as ~/foo so that we don't try to look for
924 ;; `name' in /home or in /.
927 ;; `user' is not initialized outside the loop because
928 ;; `file' may not exist, so we may have to walk up part of the
929 ;; hierarchy before we find the "initial UID". Note: currently unused
930 ;; (user nil)
931 try)
934 ;; FIXME: Disabled this heuristic because it is sometimes
935 ;; inappropriate.
936 ;; As a heuristic, we stop looking up the hierarchy of
937 ;; directories as soon as we find a directory belonging
938 ;; to another user. This should save us from looking in
939 ;; things like /net and /afs. This assumes that all the
940 ;; files inside a project belong to the same user.
941 ;; (let ((prev-user user))
942 ;; (setq user (nth 2 (file-attributes file)))
943 ;; (and prev-user (not (equal user prev-user))))
955 "Non-nil means warn if cannot access `user-emacs-directory'.
956 Set this to nil at your own risk..."
962 "Return an absolute per-user Emacs-specific file name.
963 If NEW-NAME exists in `user-emacs-directory', return it.
964 Else if OLD-NAME is non-nil and ~/OLD-NAME exists, return ~/OLD-NAME.
965 Else return NEW-NAME in `user-emacs-directory', creating the
966 directory if it does not exist."
974 at-home
975 ;; Make sure `user-emacs-directory' exists,
976 ;; unless we're in batch mode or dumping Emacs.
978 purify-flag
988 user-emacs-directory-warning
990 ;; Only warn once per Emacs session.
994 Unable to %s `user-emacs-directory' (%s).
995 Any data that would normally be written there may be lost!
996 If you never want to see this message again,
997 customize the variable `user-emacs-directory-warning'."
998 errtype user-emacs-directory)))))
999 bestname))))
1003 "Search for COMMAND in `exec-path' and return the absolute file name.
1004 Return nil if COMMAND is not found anywhere in `exec-path'."
1005 ;; Use 1 rather than file-executable-p to better match the behavior of
1006 ;; call-process.
1010 "Load the Emacs Lisp library named LIBRARY.
1011 This is an interface to the function `load'. LIBRARY is searched
1012 for in `load-path', both with and without `load-suffixes' (as
1013 well as `load-file-rep-suffixes').
1015 See Info node `(emacs)Lisp Libraries' for more details.
1016 See `load-file' for a different interface to `load'."
1020 load-path
1025 "Test whether FILE specifies a location on a remote system.
1026 A file is considered remote if accessing it is likely to
1027 be slower or less reliable than accessing local files.
1029 `file-remote-p' never opens a new remote connection. It can
1030 only reuse a connection that is already open.
1032 Return nil or a string identifying the remote connection
1033 \(ideally a prefix of FILE). Return nil if FILE is a relative
1034 file name.
1036 When IDENTIFICATION is nil, the returned string is a complete
1037 remote identifier: with components method, user, and host. The
1038 components are those present in FILE, with defaults filled in for
1039 any that are missing.
1041 IDENTIFICATION can specify which part of the identification to
1042 return. IDENTIFICATION can be the symbol `method', `user',
1043 `host', or `localname'. Any other value is handled like nil and
1044 means to return the complete identification. The string returned
1045 for IDENTIFICATION `localname' can differ depending on whether
1046 there is an existing connection.
1048 If CONNECTED is non-nil, return an identification only if FILE is
1049 located on a remote system and a connection is established to
1050 that remote system.
1052 Tip: You can use this expansion of remote identifier components
1053 to derive a new remote file name from an existing one. For
1059 same remote identifier as FILE but expanded; a name such as
1064 nil)))
1066 ;; Probably this entire variable should be obsolete now, in favor of
1067 ;; something Tramp-related (?). It is not used in many places.
1068 ;; It's not clear what the best file for this to be in is, but given
1069 ;; it uses custom-initialize-delay, it is easier if it is preloaded
1070 ;; rather than autoloaded.
1072 ;; This used to try various hard-coded places for remsh, rsh, and
1073 ;; rcmd, trying to guess based on location whether "rsh" was
1074 ;; "restricted shell" or "remote shell", but I don't see the point
1075 ;; in this day and age. Almost everyone will use ssh, and have
1076 ;; whatever command they want to use in PATH.
1083 "Program to use to execute commands on a remote host (e.g. ssh or rsh)."
1090 "Whether to use the remote file-name cache for read access.
1091 When `nil', never expire cached values (caution)
1092 When `t', never use the cache (safe, but may be slow)
1093 A number means use cached values for that amount of seconds since caching.
1095 The attributes of remote files are cached for better performance.
1096 If they are changed outside of Emacs's control, the cached values
1097 become invalid, and must be reread. If you are sure that nothing
1098 other than Emacs changes the files, you can set this variable to `nil'.
1100 If a remote file is checked regularly, it might be a good idea to
1101 let-bind this variable to a value less than the interval between
1102 consecutive checks. For example:
1104 (defun display-time-file-nonempty-p (file)
1105 (let ((remote-file-name-inhibit-cache (- display-time-interval 5)))
1106 (and (file-exists-p file)
1107 (< 0 (nth 7 (file-attributes (file-chase-links file)))))))"
1118 "Copy the file FILE into a temporary file on this machine.
1119 Returns the name of the local copy, or nil, if FILE is directly
1120 accessible."
1121 ;; This formerly had an optional BUFFER argument that wasn't used by
1122 ;; anything.
1126 nil)))
1129 "Return the truename of FILENAME.
1130 If FILENAME is not absolute, first expands it against `default-directory'.
1131 The truename of a file name is found by chasing symbolic links
1132 both at the level of the file and at the level of the directories
1133 containing it, until no links are left at any level.
1136 ;; COUNTER and PREV-DIRS are only used in recursive calls.
1137 ;; COUNTER can be a cons cell whose car is the count of how many
1138 ;; more links to chase before getting an error.
1139 ;; PREV-DIRS can be a cons cell whose car is an alist
1140 ;; of truenames we've just recently computed.
1154 ;; For speed, remove the ange-ftp completion handler from the list.
1155 ;; We know it's not needed here.
1156 ;; For even more speed, do this only on the outermost call.
1163 ;; andrewi@harlequin.co.uk - on Windows, there is an issue with
1164 ;; case differences being ignored by the OS, and short "8.3 DOS"
1165 ;; name aliases existing for all files. (The short names are not
1166 ;; reported by directory-files, but can be used to refer to files.)
1167 ;; It seems appropriate for file-truename to resolve these issues in
1168 ;; the most natural way, which on Windows is to call the function
1169 ;; `w32-long-file-name' - this returns the exact name of a file as
1170 ;; it is stored on disk (expanding short name aliases with the full
1171 ;; name in the process).
1174 ;; If filename exists, use its long name. If it doesn't
1175 ;; exist, the recursion below on the directory of filename
1176 ;; will drill down until we find a directory that exists,
1177 ;; and use the long name of that, with the extra
1178 ;; non-existent path components concatenated.
1183 ;; If this file directly leads to a link, process that iteratively
1184 ;; so that we don't use lots of stack.
1190 ;; For file name that has a special handler, call handler.
1191 ;; This is so that ange-ftp can save time by doing a no-op.
1194 done t)
1196 target dirfile)
1197 ;; Get the truename of the directory.
1199 ;; If these are equal, we have the (or a) root directory.
1203 ;; If this is the same dir we last got the truename for,
1204 ;; save time--don't recalculate.
1214 done t)
1217 done t)
1218 ;; Put it back on the file name.
1220 ;; Is the file name the name of a link?
1223 ;; Yes => chase that link, then start all over
1224 ;; since the link may point to a directory name that uses links.
1225 ;; We can't safely use expand-file-name here
1226 ;; since target might look like foo/../bar where foo
1227 ;; is itself a link. Instead, we handle . and .. above.
1230 target
1232 done nil)
1233 ;; No, we are done!
1235 filename))
1238 "Chase links in FILENAME until a name that is not a link.
1239 Unlike `file-truename', this does not check whether a parent
1240 directory name is a symbolic link.
1241 If the optional argument LIMIT is a number,
1242 it means chase no more than that many links and then stop."
1250 ;; In the context of a link, `//' doesn't mean what Emacs thinks.
1253 ;; Handle `..' by hand, since it needs to work in the
1254 ;; target of any directory symlink.
1255 ;; This code is not quite complete; it does not handle
1256 ;; embedded .. in some cases such as ./../foo and foo/bar/../../../lose.
1260 ;; Chase links in the default dir of the symlink.
1264 ;; Now find the parent of that dir.
1268 newname))
1270 ;; A handy function to display file sizes in human-readable form.
1271 ;; See http://en.wikipedia.org/wiki/Kibibyte for the reference.
1273 "Produce a string showing FILE-SIZE in human-readable form.
1275 Optional second argument FLAVOR controls the units and the display format:
1277 If FLAVOR is nil or omitted, each kilobyte is 1024 bytes and the produced
1279 If FLAVOR is `si', each kilobyte is 1000 bytes and the produced suffixes
1281 If FLAVOR is `iec', each kilobyte is 1024 bytes and the produced suffixes
1284 1024.0
1287 ;; none, kilo, mega, giga, tera, peta, exa, zetta, yotta
1293 "%.1f%s%s"
1295 file-size
1297 "K"
1302 "Create a temporary file.
1303 The returned file name (created by appending some random characters at the end
1304 of PREFIX, and expanding against `temporary-file-directory' if necessary),
1305 is guaranteed to point to a newly created empty file.
1306 You can then use `write-region' to write new data into the file.
1308 If DIR-FLAG is non-nil, create a new empty directory instead of a file.
1310 If SUFFIX is non-nil, add that at the end of the file name."
1311 ;; Create temp files with strict access rights. It's easy to
1312 ;; loosen them later, whereas it's impossible to close the
1313 ;; time-window of loose permissions otherwise.
1322 temporary-file-directory)
1324 temporary-file-directory))))
1330 nil)
1332 ;; the file was somehow created by someone else between
1333 ;; `make-temp-name' and `write-region', let's try again.
1334 nil)
1335 file)))
1338 "Change the encoding of FILE's name from CODING to NEW-CODING.
1339 The value is a new name of FILE.
1340 Signals a `file-already-exists' error if a file of the new name
1341 already exists unless optional fourth argument OK-IF-ALREADY-EXISTS
1342 is non-nil. A number as fourth arg means request confirmation if
1343 the new name already exists. This is what happens in interactive
1344 use with M-x."
1347 default-file-name-coding-system))
1349 from-coding to-coding)
1351 ;; We provide the default coding only when it seems that
1352 ;; the filename is correctly decoded by the default
1353 ;; coding.
1359 filename default-coding)
1360 default-coding))
1364 ;; We provide the default coding only when a user is going to
1365 ;; change the encoding not from the default coding.
1369 filename from-coding)))
1372 filename from-coding default-coding)
1373 default-coding)))
1377 default-file-name-coding-system))
1378 ;; FILE should have been decoded by DEFAULT-CODING.
1382 ;; Suppress further encoding.
1387 newname))
1388 \f
1390 "Whether confirmation is requested before visiting a new file or buffer.
1391 If nil, confirmation is not requested.
1392 If the value is `after-completion', confirmation is only
1393 requested if the user called `minibuffer-complete' right before
1394 `minibuffer-complete-and-exit'.
1395 Any other non-nil value means to request confirmation.
1397 This affects commands like `switch-to-buffer' and `find-file'."
1405 "Whether to request confirmation before visiting a new file or buffer.
1406 The variable `confirm-nonexistent-file-or-buffer' determines the
1407 return value, which may be passed as the REQUIRE-MATCH arg to
1408 `read-buffer' or `find-file-read-args'."
1416 "Temporarily add FUN to `minibuffer-setup-hook' while executing BODY.
1417 FUN can also be (:append FUN1), in which case FUN1 is appended to
1418 `minibuffer-setup-hook'.
1420 BODY should use the minibuffer at most once.
1421 Recursive uses of the minibuffer are unaffected (FUN is not
1422 called additional times).
1424 This macro actually adds an auxiliary function that calls FUN,
1425 rather than FUN itself, to `minibuffer-setup-hook'."
1436 ;; Clear out this hook so it does not interfere
1437 ;; with any recursive minibuffer usage.
1448 t))
1451 "Edit file FILENAME.
1452 Switch to a buffer visiting file FILENAME,
1453 creating one if none already exists.
1454 Interactively, the default if you just type RET is the current directory,
1455 but the visited file name is available through the minibuffer history:
1456 type M-n to pull it into the minibuffer.
1458 You can visit files on remote machines by specifying something
1459 like /ssh:SOME_REMOTE_MACHINE:FILE for the file name. You can
1460 also visit local files as a different user by specifying
1461 /sudo::FILE for the file name.
1462 See the Info node `(tramp)File name Syntax' in the Tramp Info
1463 manual, for more about this.
1465 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1466 expand wildcards (if any) and visit multiple files. You can
1467 suppress wildcard expansion by setting `find-file-wildcards' to nil.
1469 To visit a file without any kind of conversion and without
1480 "Edit file FILENAME, in another window.
1483 an existing one. See the function `display-buffer'.
1485 Interactively, the default if you just type RET is the current directory,
1486 but the visited file name is available through the minibuffer history:
1487 type M-n to pull it into the minibuffer.
1489 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1490 expand wildcards (if any) and visit multiple files."
1500 value)
1504 "Edit file FILENAME, in another frame.
1507 an existing one. See the function `display-buffer'.
1509 Interactively, the default if you just type RET is the current directory,
1510 but the visited file name is available through the minibuffer history:
1511 type M-n to pull it into the minibuffer.
1513 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1514 expand wildcards (if any) and visit multiple files."
1524 value)
1528 "Edit the existing file FILENAME.
1530 file names with wildcards."
1547 value))
1550 "Edit file FILENAME but don't allow changes.
1559 "Edit file FILENAME in another window but don't allow changes.
1568 "Edit file FILENAME in another frame but don't allow changes.
1577 "Find file FILENAME as a replacement for the file in the next window.
1578 This command does not select that window.
1582 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1583 expand wildcards (if any) and replace the file with multiple files."
1594 "Find alternate file: " file-dir nil
1596 t))))
1603 ;; Defined and used in buffer.c, but not as a DEFVAR_LISP.
1605 "Hook run when a buffer is killed.
1606 The buffer being killed is current while the hook is running.
1607 See `kill-buffer'.
1609 Note: Be careful with let-binding this hook considering it is
1613 "Find file FILENAME, select its buffer, kill previous buffer.
1614 If the current buffer now contains an empty file that you just visited
1615 \(presumably by mistake), use this command to visit the file you really want.
1619 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1620 expand wildcards (if any) and replace the file with multiple files.
1622 If the current buffer is an indirect buffer, or the base buffer
1623 for one or more indirect buffers, the other buffer(s) are not
1624 killed."
1633 "Find alternate file: " file-dir nil
1635 t)))
1647 ;; Run `kill-buffer-hook' here. It needs to happen before
1648 ;; variables like `buffer-file-name' etc are set to nil below,
1649 ;; because some of the hooks that could be invoked
1650 ;; (e.g., `save-place-to-alist') depend on those variables.
1651 ;;
1652 ;; Note that `kill-buffer-hook' is not what queries whether to
1653 ;; save a modified buffer visiting a file. Rather, `kill-buffer'
1654 ;; asks that itself. Thus, there's no need to temporarily do
1655 ;; `(set-buffer-modified-p nil)' before running this hook.
1657 ;; Okay, now we can end-of-life the old buffer.
1664 ;; This prevents us from finding the same buffer
1665 ;; if we specified the same file again.
1669 ;; Likewise for dired buffers.
1673 ;; This executes if find-file gets an error
1674 ;; and does not really find anything.
1675 ;; We put things back as they were.
1676 ;; If find-file actually finds something, we kill obuf below.
1685 ;; We already ran these; don't run them again.
1688 \f
1689 ;; FIXME we really need to fold the uniquify stuff in here by default,
1690 ;; not using advice, and add it to the doc string.
1692 "Create a suitably named buffer for visiting FILENAME, and return it.
1693 FILENAME (sans directory) is used unchanged if that name is free;
1694 otherwise a string <2> or <3> or ... is appended to get an unused name.
1696 Emacs treats buffers whose names begin with a space as internal buffers.
1697 To avoid confusion when visiting a file whose name begins with a space,
1704 lastname))))
1707 "Create and return a buffer with a name based on NAME.
1708 Choose the buffer's name using `generate-new-buffer-name'."
1712 "Regexp to match the automounter prefix in a directory name."
1721 "Return a version of FILENAME shortened using `directory-abbrev-alist'.
1723 home directory is a root directory) and removes automounter prefixes
1724 \(see the variable `automount-dir-prefix')."
1725 ;; Get rid of the prefixes added by the automounter.
1732 ;; Avoid treating /home/foo as /home/Foo during `~' substitution.
1733 ;; To fix this right, we need a `file-name-case-sensitive-p'
1734 ;; function, but we don't have that yet, so just guess.
1737 ;; If any elt of directory-abbrev-alist matches this name,
1738 ;; abbreviate accordingly.
1744 ;; Compute and save the abbreviated homedir name.
1745 ;; We defer computing this until the first time it's needed, to
1746 ;; give time for directory-abbrev-alist to be set properly.
1747 ;; We include a slash at the end, to avoid spurious matches
1748 ;; such as `/usr/foobar' when the home dir is `/usr/foo'.
1755 ;; If FILENAME starts with the abbreviated homedir,
1756 ;; make it start with `~' instead.
1758 ;; If the home dir is just /, don't change it.
1761 ;; MS-DOS root directories can come with a drive letter;
1762 ;; Novell Netware allows drive letters beyond `Z:'.
1770 filename)))
1773 "Return the buffer visiting file FILENAME (a string).
1774 This is like `get-file-buffer', except that it checks for any buffer
1775 visiting the same file, possibly under a different name.
1776 If PREDICATE is non-nil, only buffers satisfying it are eligible,
1777 and others are ignored.
1778 If there is no such live buffer, return nil."
1791 found)
1801 ;; Verify this buffer's file number
1802 ;; still belongs to its file.
1805 attributes)
1809 found))))
1810 \f
1812 "Non-nil means file-visiting commands should handle wildcards.
1813 For example, if you specify `*.c', that would visit all the files
1814 whose names match the pattern."
1820 "Non-nil means suppress warning messages for symlinked files.
1821 When nil, Emacs prints a warning when visiting a file that is already
1822 visited, but with a different name. Setting this option to t
1823 suppresses this warning."
1829 "Maximum size of file above which a confirmation is requested.
1830 When nil, never request confirmation."
1837 "Warn if file size exceeds this percentage of available free memory.
1838 When nil, never issue warning. Beware: This probably doesn't do what you
1846 "If file SIZE larger than `large-file-warning-threshold', allow user to abort.
1847 OP-TYPE specifies the file operation being performed (for message to user)."
1856 "Warn if an attempt to open file of SIZE bytes may run out of memory."
1866 "You are trying to open a file whose size (%s)
1867 exceeds the %S%% of currently available free memory (%s).
1868 If that fails, try to open it with `find-file-literally'
1869 \(but note that some characters might be displayed incorrectly)."
1871 out-of-memory-warning-percentage
1875 "Like `message', except sometimes don't print to minibuffer.
1876 If the variable `save-silently' is non-nil, the message is not
1877 displayed on the minibuffer."
1882 "Read file FILENAME into a buffer and return the buffer.
1883 If a buffer exists visiting FILENAME, return that one, but
1884 verify that the file has not changed since visited or saved.
1885 The buffer is not selected, just returned to the caller.
1886 Optional second arg NOWARN non-nil means suppress any warning messages.
1887 Optional third arg RAWFILE non-nil means the file is read literally.
1888 Optional fourth arg WILDCARDS non-nil means do wildcard processing
1889 and visit all the matching files. When wildcards are actually
1890 used and expanded, return a list of buffers that are visiting
1891 the various files."
1898 'find-directory-functions
1901 filename)))
1904 find-file-wildcards
1918 ;; Find any buffer for a file which has same truename.
1920 ;; Let user know if there is a buffer with the same truename.
1924 find-file-suppress-same-file-warnings
1928 ;; Optionally also find that buffer.
1931 ;; Check to see if the file looks uncommonly large.
1936 ;; We are using an existing buffer.
1943 ;; Certain files should be reverted automatically
1944 ;; if they have changed on disk and not in the buffer.
1952 found))
1962 "File %s changed on disk. Discard your edits? "
1967 "File %s changed on disk. Discard your edits in %s? "
1975 ;; Check if a formerly read-only file has become
1976 ;; writable and vice versa, but if the buffer agrees
1977 ;; with the new state of the file, that is ok too.
1987 buffer-file-name
1988 new-status new-status)))
1994 nonexistent
1995 ;; It is confusing to ask whether to visit
1996 ;; non-literally if they have the file in
1997 ;; hexl-mode or image-mode.
2003 "The file %s is already visited normally,
2004 and you have edited the buffer. Now you have asked to visit it literally,
2005 meaning no coding system handling, format conversion, or local variables.
2006 Emacs can only visit a file in one way at a time.
2008 Do you want to save the file, and visit it literally instead? "
2009 "The file %s is already visited literally,
2010 meaning no coding system handling, format conversion, or local variables.
2011 You have edited the buffer. Now you have asked to visit the file normally,
2012 but Emacs can only visit a file in one way at a time.
2019 rawfile truename number))
2023 "\
2024 Do you want to discard your changes, and visit the file literally now? "
2025 "\
2028 rawfile truename number)
2034 "The file %s is already visited normally.
2035 You have asked to visit it literally,
2036 meaning no coding system decoding, format conversion, or local variables.
2037 But Emacs can only visit a file in one way at a time.
2039 Do you want to revisit the file literally now? "
2040 "The file %s is already visited literally,
2041 meaning no coding system decoding, format conversion, or local variables.
2042 You have asked to visit it normally,
2043 but Emacs can only visit a file in one way at a time.
2048 rawfile truename number)
2051 ;; Return the buffer we are using.
2052 buf)
2053 ;; Create a new buffer.
2055 ;; find-file-noselect-1 may use a different buffer.
2057 rawfile truename number))))))
2063 ;; Needed in case we are re-visiting the file with a different
2064 ;; text representation.
2081 filename)))
2082 ;; Unconditionally set error
2092 filename)))
2093 ;; Run find-file-not-found-functions until one returns non-nil.
2095 ;; If they fail too, set error.
2097 ;; Record the file's truename, and maybe use that as visited name.
2105 ;; Set buffer's default directory to that of the file.
2107 ;; Turn off backup files for certain file names. Since
2108 ;; this is a permanent local, the major mode won't eliminate it.
2122 \f
2124 "Like `insert-file-contents', but only reads in the file literally.
2125 A buffer may be modified in several ways after reading into the buffer,
2126 due to Emacs features such as format decoding, character code
2127 conversion, `find-file-hook', automatic uncompression, etc.
2129 This function ensures that none of these modifications will take place."
2135 ;; FIXME: Yuck!! We should turn insert-file-contents-literally
2136 ;; into a file operation instead!
2138 inhibit-file-name-handlers))
2145 filename)))
2146 ;; Check whether the file is uncommonly large
2157 "Insert contents of file FILENAME into buffer after point with no conversion.
2159 This function is meant for the user to run interactively.
2160 Don't call it from programs! Use `insert-file-contents-literally' instead.
2161 \(Its calling sequence is different; see its documentation)."
2167 "Non-nil if this buffer was made by `find-file-literally' or equivalent.
2168 This has the `permanent-local' property, which takes effect if you
2173 "Visit file FILENAME with no conversion of any kind.
2174 Format conversion and character code conversion are both disabled,
2175 and multibyte characters are disabled in the resulting buffer.
2176 The major mode used is Fundamental mode regardless of the file name,
2177 and local variable specifications in the file are ignored.
2178 Automatic uncompression and adding a newline at the end of the
2179 file due to `require-final-newline' is also disabled.
2181 You cannot absolutely rely on this function to result in
2182 visiting the file literally. If Emacs already has a buffer
2183 which is visiting the file, you get the existing buffer,
2184 regardless of whether it was created literally or not.
2186 In a Lisp program, if you want to be sure of accessing a file's
2187 contents literally, you should create a temporary buffer and then read
2188 the file contents into it using `insert-file-contents-literally'."
2191 "Find file literally: " nil default-directory
2194 \f
2196 _after-find-file-from-revert-buffer
2197 nomodes)
2198 "Called after finding a file and by the default revert function.
2199 Sets buffer mode, parses local variables.
2200 Optional args ERROR, WARN, and NOAUTO: ERROR non-nil means there was an
2201 error in reading the file. WARN non-nil means warn if there
2202 exists an auto-save file more recent than the visited file.
2203 NOAUTO means don't mess with auto-save mode.
2204 Fourth arg AFTER-FIND-FILE-FROM-REVERT-BUFFER is ignored
2205 \(see `revert-buffer-in-progress-p' for similar functionality).
2206 Fifth arg NOMODES non-nil means don't alter the file's modes.
2207 Finishes by calling the functions in `find-file-hook'
2208 unless NOMODES is non-nil."
2211 nil
2221 "Symbolic link that points to nonexistent file"
2225 ;; No need to warn if buffer is auto-saved
2226 ;; under the name of the visited file.
2228 auto-save-visited-file-name))
2231 buffer-file-name))
2251 ;; Make people do a little extra work (C-x C-q)
2252 ;; before altering a backup file.
2255 ;; When a file is marked read-only,
2256 ;; make the buffer read-only even if root is looking at it.
2264 ;; If requested, add a newline at the end of the file.
2275 view-read-only
2281 "Eval BODY and turn any error into a FORMAT message.
2282 FORMAT can have a %s escape which will be replaced with the actual error.
2283 If `debug-on-error' is set, errors are not caught, so that you can
2284 debug them.
2285 Avoid using a large BODY since it is duplicated."
2294 "Choose the major mode for this buffer automatically.
2295 Also sets up any specified local variables of the file.
2296 Uses the visited file name, the -*- line, and the local variables spec.
2298 This function is called automatically from `find-file'. In that case,
2299 we may set up the file-specified mode and local variables,
2300 depending on the value of `enable-local-variables'.
2301 In addition, if `local-enable-local-variables' is nil, we do
2302 not set local variables (though we do notice a mode specified with -*-.)
2304 `enable-local-variables' is ignored if you run `normal-mode' interactively,
2305 or from Lisp without specifying the optional argument FIND-FILE;
2306 in that case, this function acts as if `enable-local-variables' were t."
2310 ;; FIXME this is less efficient than it could be, since both
2311 ;; s-a-m and h-l-v may parse the same regions, looking for "mode:".
2316 ;; Turn font lock off and on, to make sure it takes account of
2317 ;; whatever file local variables are relevant to it.
2319 ;; Font-lock-mode (now in font-core.el) can be ON when
2320 ;; font-lock.el still hasn't been loaded.
2327 "Non-nil means to try second pass through `auto-mode-alist'.
2328 This means that if the first case-sensitive search through the alist fails
2329 to find a matching major mode, a second case-insensitive search is made.
2330 On systems with case-insensitive file names, this variable is ignored,
2331 since only a single case-insensitive search through the alist is made."
2337 ;; Note: The entries for the modes defined in cc-mode.el (c-mode,
2338 ;; c++-mode, java-mode and more) are added through autoload
2339 ;; directives in that file. That way is discouraged since it
2340 ;; spreads out the definition of the initial value.
2386 ;; Less common extensions come here
2387 ;; so more common ones above are found faster.
2395 ;; Besides .gdbinit, gdb documents other names to be usable for init
2396 ;; files, cross-debuggers can use something like
2397 ;; .PROCESSORNAME-gdbinit so that the host and target gdbinit files
2398 ;; don't interfere with each other.
2400 ;; GDB 7.5 introduced OBJFILE-gdb.gdb script files; e.g. a file
2401 ;; named 'emacs-gdb.gdb', if it exists, will be automatically
2402 ;; loaded when GDB reads an objfile called 'emacs'.
2410 ("\\(/\\|\\`\\)\\.\\(bash_\\(profile\\|history\\|log\\(in\\|out\\)\\)\\|z?log\\(in\\|out\\)\\)\\'" . sh-mode)
2434 ;; The Fortran standard does not say anything about file extensions.
2435 ;; .f90 was widely used for F90, now we seem to be trapped into
2436 ;; using a different extension for each language revision.
2437 ;; Anyway, the following extensions are supported by gfortran.
2445 ;; The list of archive file extensions should be in sync with
2446 ;; `auto-coding-alist' with `no-conversion' coding system.
2452 ;; Mailer puts message to be edited in
2453 ;; /tmp/Re.... or Message
2456 ;; some news reader is reported to use this
2469 ;; .emacs or .gnus or .viper following a directory delimiter in
2470 ;; Unix or MS-DOS syntax.
2473 ;; _emacs following a directory delimiter in MS-DOS syntax
2477 ;; Linux-2.6.9 uses some different suffix for linker scripts:
2478 ;; "ld", "lds", "lds.S", "lds.in", "ld.script", and "ld.script.balo".
2479 ;; eCos uses "ld" and "ldi". Netbsd uses "ldscript.*".
2482 ;; .xs is also used for ld scripts, but seems to be more commonly
2483 ;; associated with Perl .xs files (C with Perl bindings). (Bug#7071)
2485 ;; Explained in binutils ld/genscripts.sh. Eg:
2486 ;; A .x script file is the default script.
2487 ;; A .xr script is for linking without relocation (-r flag). Etc.
2491 ;; Common Lisp ASDF package system.
2498 ("\\.\\(?:PDF\\|DVI\\|OD[FGPST]\\|DOCX?\\|XLSX?\\|PPTX?\\|pdf\\|djvu\\|dvi\\|od[fgpst]\\|docx?\\|xlsx?\\|pptx?\\)\\'" . doc-view-mode-maybe)
2510 ;; Windows candidates may be opened case sensitively on Unix
2516 ("\\`/etc/\\(?:DIR_COLORS\\|ethers\\|.?fstab\\|.*hosts\\|lesskey\\|login\\.?de\\(?:fs\\|vperm\\)\\|magic\\|mtab\\|pam\\.d/.*\\|permissions\\(?:\\.d/.+\\)?\\|protocols\\|rpc\\|services\\)\\'" . conf-space-mode)
2517 ("\\`/etc/\\(?:acpid?/.+\\|aliases\\(?:\\.d/.+\\)?\\|default/.+\\|group-?\\|hosts\\..+\\|inittab\\|ksysguarddrc\\|opera6rc\\|passwd-?\\|shadow-?\\|sysconfig/.+\\)\\'" . conf-mode)
2518 ;; ChangeLog.old etc. Other change-log-mode entries are above;
2519 ;; this has lower priority to avoid matching changelog.sgml etc.
2521 ;; either user's dot-files or under /etc or some such
2523 ;; alas not all ~/.*rc files are like this
2524 ("/\\.\\(?:enigma\\|gltron\\|gtk\\|hxplayer\\|net\\|neverball\\|qt/.+\\|realplayer\\|scummvm\\|sversion\\|sylpheed/.+\\|xmp\\)rc\\'" . conf-mode)
2529 ;; this contains everything twice, with space and with colon :-(
2531 ;; Get rid of any trailing .n.m and try again.
2532 ;; This is for files saved by cvs-merge that look like .#<file>.<rev>
2533 ;; or .#<file>.<rev>-<rev> or VC's <file>.~<rev>~.
2534 ;; Using mode nil rather than `ignore' would let the search continue
2535 ;; through this list (with the shortened name) rather than start over.
2538 ;; This should come after "in" stripping (e.g. config.h.in).
2539 ;; *.cf, *.cfg, *.conf, *.config[.local|.de_DE.UTF8|...], */config
2541 ;; The following should come after the ChangeLog pattern
2542 ;; for the sake of ChangeLog.1, etc.
2543 ;; and after the .scm.[0-9] and CVS' <file>.<rev> patterns too.
2545 "Alist of filename patterns vs corresponding major mode functions.
2546 Each element looks like (REGEXP . FUNCTION) or (REGEXP FUNCTION NON-NIL).
2547 \(NON-NIL stands for anything that is not nil; the value does not matter.)
2548 Visiting a file whose name matches REGEXP specifies FUNCTION as the
2549 mode function to use. FUNCTION will be called, unless it is nil.
2551 If the element has the form (REGEXP FUNCTION NON-NIL), then after
2552 calling FUNCTION (if it's not nil), we delete the suffix that matched
2553 REGEXP and search the list again for another match.
2555 The extensions whose FUNCTION is `archive-mode' should also
2556 appear in `auto-coding-alist' with `no-conversion' coding system.
2558 See also `interpreter-mode-alist', which detects executable script modes
2559 based on the interpreters they specify to run,
2564 "Select Conf mode or XML mode according to start of file."
2574 ;; Note: The entries for the modes defined in cc-mode.el (awk-mode
2575 ;; and pike-mode) are added through autoload directives in that
2576 ;; file. That way is discouraged since it spreads out the
2577 ;; definition of the initial value.
2606 "Alist mapping interpreter names to major modes.
2607 This is used for files whose first lines match `auto-mode-interpreter-regexp'.
2608 Each element looks like (REGEXP . MODE).
2610 the interpreter specified in the first line of a script, enable
2611 major mode MODE.
2618 ;; TODO really this should be a list of modes (eg tar-mode), not regexps,
2619 ;; because we are duplicating info from auto-mode-alist.
2620 ;; TODO many elements of this list are also in auto-coding-alist.
2629 "List of regexps matching file names in which to ignore local variables.
2631 Files matching this list are typically binary file formats.
2632 They may happen to contain sequences that look like local variable
2633 specifications, but are not really, or they may be containers for
2634 member files with their own local variable sections, which are
2635 not appropriate for the containing file.
2642 "List of regexps matching suffixes to remove from file names.
2643 The function `inhibit-local-variables-p' uses this: when checking
2644 a file name, it first discards from the end of the name anything that
2647 ;; Can't think of any situation in which you'd want this to be nil...
2652 "Return non-nil if file local variables should be ignored.
2653 This checks the file (or buffer) name against `inhibit-local-variables-regexps'
2654 and `inhibit-local-variables-suffixes'. If
2655 `inhibit-local-variables-ignore-case' is non-nil, this ignores case."
2664 sufs)
2669 temp))
2674 "Regexp matching interpreters, for file mode determination.
2675 This regular expression is matched against the first line of a file
2676 to determine the file's mode in `set-auto-mode'. If it matches, the file
2677 is assumed to be interpreted by the interpreter matched by the second group
2678 of the regular expression. The mode is then determined as the mode
2682 "Alist of buffer beginnings vs. corresponding major mode functions.
2683 Each element looks like (REGEXP . FUNCTION) or (MATCH-FUNCTION . FUNCTION).
2684 After visiting a file, if REGEXP matches the text at the beginning of the
2685 buffer, or calling MATCH-FUNCTION returns non-nil, `normal-mode' will
2686 call FUNCTION rather than allowing `auto-mode-alist' to decide the buffer's
2687 major mode.
2689 If FUNCTION is nil, then it is not called. (That is a way of saying
2697 ;; The < comes before the groups (but the first) to reduce backtracking.
2698 ;; TODO: UTF-16 <?xml may be preceded by a BOM 0xff 0xfe or 0xfe 0xff.
2699 ;; We use [ \t\r\n] instead of `\\s ' to make regex overflow less likely.
2703 comment-re "*"
2706 . html-mode)
2708 ;; These two must come after html, because they are more general:
2713 . sgml-mode)
2716 "Like `magic-mode-alist' but has lower priority than `auto-mode-alist'.
2717 Each element looks like (REGEXP . FUNCTION) or (MATCH-FUNCTION . FUNCTION).
2718 After visiting a file, if REGEXP matches the text at the beginning of the
2719 buffer, or calling MATCH-FUNCTION returns non-nil, `normal-mode' will
2720 call FUNCTION, provided that `magic-mode-alist' and `auto-mode-alist'
2721 have not specified a mode for this file.
2727 "Upper limit on `magic-mode-alist' regexp matches.
2731 "Select major mode appropriate for current buffer.
2733 To find the right major mode, this function checks for a -*- mode tag
2734 checks for a `mode:' entry in the Local Variables section of the file,
2735 checks if it uses an interpreter listed in `interpreter-mode-alist',
2736 matches the buffer beginning against `magic-mode-alist',
2737 compares the filename against the entries in `auto-mode-alist',
2738 then matches the buffer beginning against `magic-fallback-mode-alist'.
2740 If `enable-local-variables' is nil, or if the file name matches
2741 `inhibit-local-variables-regexps', this function does not check
2742 for any mode: tag anywhere in the file. If `local-enable-local-variables'
2743 is nil, then the only mode: tag that can be relevant is a -*- one.
2745 If the optional argument KEEP-MODE-IF-SAME is non-nil, then we
2746 set the major mode only if that would change it. In other words
2747 we don't actually set it to the same mode the buffer already has."
2748 ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*-
2750 end done mode modes)
2751 ;; Once we drop the deprecated feature where mode: is also allowed to
2752 ;; specify minor-modes (ie, there can be more than one "mode:"), we can
2753 ;; remove this section and just let (hack-local-variables t) handle it.
2754 ;; Find a -*- mode tag.
2758 ;; Note by design local-enable-local-variables does not matter here.
2760 try-locals
2763 ;; Find all specifications for the `mode:' variable
2764 ;; and execute them left to right.
2776 modes)))
2777 ;; Simple -*-MODE-*- case.
2780 modes))))
2781 ;; If we found modes to use, invoke them now, outside the save-excursion.
2789 ;; continuing would call minor modes again, toggling them off
2791 ;; hack-local-variables checks local-enable-local-variables etc, but
2792 ;; we might as well be explicit here for the sake of clarity.
2794 enable-local-variables
2795 local-enable-local-variables
2796 try-locals
2803 ;; If we didn't, look for an interpreter specified in the first line.
2804 ;; As a special case, allow for things like "#!/bin/env perl", which
2805 ;; finds the interpreter anywhere in $PATH.
2811 ;; Map interpreter name to a mode, signaling we're done at the
2812 ;; same time.
2819 interpreter-mode-alist)
2821 ;; If we found an interpreter mode to use, invoke it now.
2823 ;; Next try matching the buffer beginning against magic-mode-alist.
2837 ;; Next compare the filename against the entries in auto-mode-alist.
2842 ;; Remove backup-suffixes from file name.
2844 ;; Remove remote file name identification.
2849 ;; Find first matching alist entry.
2852 ;; System is case-insensitive.
2856 ;; System is case-sensitive.
2858 ;; First match case-sensitively.
2862 ;; Fallback to case-insensitive match.
2876 ;; Next try matching the buffer beginning against magic-fallback-mode-alist.
2893 ;; When `keep-mode-if-same' is set, we are working on behalf of
2894 ;; set-visited-file-name. In that case, if the major mode specified is the
2895 ;; same one we already have, don't actually reset it. We don't want to lose
2896 ;; minor modes such as Font Lock.
2898 "Apply MODE and return it.
2899 If optional arg KEEP-MODE-IF-SAME is non-nil, MODE is chased of
2900 any aliases and compared to current major mode. If they are the
2901 same, do nothing and return nil."
2907 mode)))
2910 "Regexp of lines to skip when looking for file-local settings.
2911 If the first line matches this regular expression, then the -*-...-*- file-
2915 "Find the -*- spec in the buffer.
2916 Call with point at the place to start searching from.
2917 If one is found, set point to the beginning and return the position
2918 of the end. Otherwise, return nil; may change point.
2919 The variable `inhibit-local-variables-regexps' can cause a -*- spec to
2920 be ignored; but `enable-local-variables' and `local-enable-local-variables'
2921 have no effect."
2924 ;; Don't look for -*- if this file name matches any
2925 ;; of the regexps in inhibit-local-variables-regexps.
2928 ;; If the file begins with "#!" (exec
2929 ;; interpreter magic), look for mode frobs
2930 ;; in the first two lines. You cannot
2931 ;; necessarily put them in the first line
2932 ;; of such a file without screwing up the
2933 ;; interpreter invocation. The same holds
2934 ;; for '\" in man pages (preprocessor
2935 ;; magic for the `man' program).
2946 end))))
2947 \f
2948 ;;; Handling file local variables
2952 file-local-variables-alist dir-local-variables-alist)
2957 "Normal hook run after processing a file's local variables specs.
2958 Major modes can use this to examine user-specified local variables
2962 "List variable-value pairs that are considered safe.
2963 Each element is a cons cell (VAR . VAL), where VAR is a variable
2964 symbol and VAL is a value that is considered safe."
2965 :risky t
2970 ;; This should be here at least as long as Emacs supports write-file-hooks.
2975 "Expressions that are considered safe in an `eval:' local variable.
2976 Add expressions to this list if you want Emacs to evaluate them, when
2977 they appear in an `eval' local variable specification, without first
2978 asking you for confirmation."
2979 :risky t
2984 ;; Risky local variables:
2987 buffer-auto-save-file-name
2988 buffer-file-name
2989 buffer-file-truename
2990 buffer-undo-list
2991 debugger
2992 default-text-properties
2993 eval
2994 exec-directory
2995 exec-path
2996 file-name-handler-alist
2997 frame-title-format
2998 global-mode-string
2999 header-line-format
3000 icon-title-format
3001 inhibit-quit
3002 load-path
3003 max-lisp-eval-depth
3004 max-specpdl-size
3005 minor-mode-map-alist
3006 minor-mode-overriding-map-alist
3007 mode-line-format
3008 mode-name
3009 overriding-local-map
3010 overriding-terminal-local-map
3011 process-environment
3012 standard-input
3013 standard-output
3014 unread-command-events))
3016 ;; Safe local variables:
3017 ;;
3018 ;; For variables defined by major modes, the safety declarations can go into
3019 ;; the major mode's file, since that will be loaded before file variables are
3020 ;; processed.
3021 ;;
3022 ;; For variables defined by minor modes, put the safety declarations in the
3023 ;; file defining the minor mode after the defcustom/defvar using an autoload
3024 ;; cookie, e.g.:
3025 ;;
3026 ;; ;;;###autoload(put 'variable 'safe-local-variable 'stringp)
3027 ;;
3028 ;; Otherwise, when Emacs visits a file specifying that local variable, the
3029 ;; minor mode file may not be loaded yet.
3030 ;;
3031 ;; For variables defined in the C source code the declaration should go here:
3053 "Alist of file-local variable settings in the current buffer.
3054 Each element in this list has the form (VAR . VALUE), where VAR
3055 is a file-local variable (a symbol) and VALUE is the value
3056 specified. The actual value in the buffer may differ from VALUE,
3062 "Alist of directory-local variable settings in the current buffer.
3063 Each element in this list has the form (VAR . VALUE), where VAR
3064 is a directory-local variable (a symbol) and VALUE is the value
3065 specified in .dir-locals.el. The actual value in the buffer
3066 may differ from VALUE, if it is changed by the major or minor modes,
3071 "Normal hook run before setting file-local variables.
3072 It is called after checking for unsafe/risky variables and
3073 setting `file-local-variables-alist', and before applying the
3074 variables stored in `file-local-variables-alist'. A hook
3075 function is allowed to change the contents of this alist.
3077 This hook is called only if there is at least one file-local
3081 "Get confirmation before setting up local variable values.
3082 ALL-VARS is the list of all variables to be set up.
3083 UNSAFE-VARS is the list of those that aren't marked as safe or risky.
3084 RISKY-VARS is the list of those that are marked as risky.
3085 If these settings come from directory-local variables, then
3086 DIR-NAME is the name of the associated directory. Otherwise it is nil."
3093 unsafe-vars))
3095 ;; Set up the contents of the *Local Variables* buffer.
3103 ", and variables that are risky (**)."
3111 y -- to apply the local variables list.
3115 ! -- to apply the local variables list, and permanently mark these
3127 ;; Make strings with embedded whitespace easier to read.
3135 ;; Display the buffer and read a choice.
3143 ""
3146 char)
3165 "Return local variables specified in the -*- line.
3166 Returns an alist of elements (VAR . VAL), where VAR is a variable
3167 and VAL is the specified value. Ignores any specification for
3168 `mode:' and `coding:' (which should have already been handled
3169 by `set-auto-mode' and `set-auto-coding', respectively).
3170 Return nil if the -*- line is malformed.
3172 If MODE-ONLY is non-nil, just returns the symbol specifying the
3173 mode, if there is one, otherwise nil."
3178 result)
3180 nil)
3182 ;; Simple form: "-*- MODENAME -*-".
3186 ;; Hairy form: '-*-' [ <variable> ':' <value> ';' ]* '-*-'
3187 ;; (last ";" is optional).
3188 ;; If MODE-ONLY, just check for `mode'.
3189 ;; Otherwise, parse the -*- line into the RESULT alist.
3197 ;; There used to be a downcase here,
3198 ;; but the manual didn't say so,
3199 ;; and people want to set var names that aren't all lc.
3205 ;; It is traditional to ignore
3206 ;; case when checking for `mode' in set-auto-mode,
3207 ;; so we must do that here as well.
3208 ;; That is inconsistent, but we're stuck with it.
3209 ;; The same can be said for `coding' in set-auto-coding.
3219 ;; Downcase "Mode:".
3225 result))))))
3228 "Filter local variable settings, querying the user if necessary.
3229 VARIABLES is the alist of variable-value settings. This alist is
3230 filtered based on the values of `ignored-local-variables',
3231 `enable-local-eval', `enable-local-variables', and (if necessary)
3232 user interaction. The results are added to
3233 `file-local-variables-alist', without applying them.
3234 If these settings come from directory-local variables, then
3235 DIR-NAME is the name of the associated directory. Otherwise it is nil."
3236 ;; Find those variables that we may want to save to
3237 ;; `safe-local-variable-values'.
3243 ;; Ignore any variable in `ignored-local-variables'.
3244 nil)
3245 ;; Obey `enable-local-eval'.
3249 ;; In case previously marked safe (bug#5636).
3251 ;; If not safe and e-l-v = :safe, ignore totally.
3255 safe
3257 ;; Ignore duplicates (except `mode') in the present list.
3259 ;; Accept known-safe variables.
3263 ;; The variable is either risky or unsafe:
3270 ;; Query, unless all vars are safe or user wants no querying.
3276 risky-vars dir-name))
3286 ;; TODO? Warn once per file rather than once per session?
3290 "Parse and put into effect this buffer's local variables spec.
3291 Uses `hack-local-variables-apply' to apply the variables.
3294 is specified, and return the corresponding mode symbol, or nil.
3295 In this case, we try to ignore minor-modes, and only return a
3296 major-mode.
3298 If `enable-local-variables' or `local-enable-local-variables' is nil,
3299 this function does nothing. If `inhibit-local-variables-regexps'
3300 applies to the file in question, the file is not scanned for
3301 local variables, but directory-local variables may still be applied."
3302 ;; We don't let inhibit-local-variables-p influence the value of
3303 ;; enable-local-variables, because then it would affect dir-local
3304 ;; variables. We don't want to search eg tar files for file local
3305 ;; variable sections, but there is no reason dir-locals cannot apply
3306 ;; to them. The real meaning of inhibit-local-variables-p is "do
3307 ;; not scan this file for local variables".
3310 result)
3314 ;; Note this is a no-op if enable-local-variables is nil.
3316 ;; This entire function is basically a no-op if enable-local-variables
3317 ;; is nil. All it does is set file-local-variables-alist to nil.
3319 ;; This part used to ignore enable-local-variables when mode-only
3320 ;; was non-nil. That was inappropriate, eg consider the
3321 ;; (artificial) example of:
3322 ;; (setq local-enable-local-variables nil)
3323 ;; Open a file foo.txt that contains "mode: sh".
3324 ;; It correctly opens in text-mode.
3325 ;; M-x set-visited-file name foo.c, and it incorrectly stays in text-mode.
3327 ;; If MODE-ONLY is non-nil, and the prop line specifies a
3328 ;; mode, then we're done, and have no need to scan further.
3330 mode-only))
3331 ;; Look for "Local variables:" line in last page.
3339 ;; suffix is what comes after "local variables:" in its line.
3340 ;; prefix is what comes before "local variables:" in its line.
3353 endpos
3359 nil t))
3360 ;; This used to be an error, but really all it means is
3361 ;; that this may simply not be a local-variables section,
3362 ;; so just ignore it.
3372 ;; Discard the prefix.
3377 ;; Discard the suffix.
3386 ;; Find the variable name;
3394 val val2)
3397 ;; Read the variable value.
3404 ;; Specifying minor-modes via mode: is
3405 ;; deprecated, but try to reject them anyway.
3415 :warning
3422 'eval
3426 ;; Now we've read all the local variables.
3427 ;; If MODE-ONLY is non-nil, return whether the mode was specified.
3429 ;; Otherwise, set the variables.
3434 "Apply the elements of `file-local-variables-alist'.
3435 If there are any elements, runs `before-hack-local-variables-hook',
3436 then calls `hack-one-local-variable' to apply the alist elements one by one.
3437 Finishes by running `hack-local-variables-hook', regardless of whether
3438 the alist is empty or not.
3440 Note that this function ignores a `mode' entry if it specifies the same
3441 major mode as the buffer already has."
3443 ;; Any 'evals must run in the Right sequence.
3452 "Non-nil if SYM is safe as a file-local variable with value VAL.
3453 It is safe if any of these conditions are met:
3455 * There is a matching entry (SYM . VAL) in the
3456 `safe-local-variable-values' user option.
3458 * The `safe-local-variable' property of SYM is a function that
3459 evaluates to a non-nil value with VAL as an argument."
3463 ;; If the function signals an error, that means it
3464 ;; can't assure us that the value is safe.
3468 "Non-nil if SYM could be dangerous as a file-local variable.
3469 It is dangerous if either of these conditions are met:
3471 * Its `risky-local-variable' property is non-nil.
3477 ;; If this is an alias, check the base name.
3497 "Return t if it is safe to eval EXP when it is found in a file."
3499 ;; Detect certain `put' expressions.
3506 lisp-indent-function
3507 scheme-indent-function))
3508 ;; Only allow safe values (not functions).
3513 ;; Only allow indirect form specs.
3514 ;; During bootstrapping, edebug-basic-spec might not be
3515 ;; defined yet.
3519 ;; Allow expressions that the user requested.
3521 ;; Certain functions can be allowed with safe arguments
3522 ;; or can specify verification functions to try.
3524 ;; Allow (minor)-modes calls with no arguments.
3525 ;; This obsoletes the use of "mode:" for such things. (Bug#8613)
3534 ok))
3542 ok))))))))
3555 "Set local variable VAR with value VAL.
3556 If VAR is `mode', call `VAL-mode' as a function unless it's
3557 already the major mode."
3559 (`mode
3565 (`eval
3571 ;; Make sure the string has no text properties.
3572 ;; Some text properties can get evaluated in various ways,
3573 ;; so it is risky to put them on with a local variable list.
3577 \f
3578 ;;; Handling directory-local variables, aka project settings.
3584 "List of cached directory roots for directory-local variable classes.
3585 Each element in this list has the form (DIR CLASS MTIME).
3586 DIR is the name of the directory.
3587 CLASS is the name of a variable class (a symbol).
3588 MTIME is the recorded modification time of the directory-local
3589 variables file associated with this entry. This time is a list
3590 of integers (the same format as `file-attributes'), and is
3591 used to test whether the cache entry is still valid.
3592 Alternatively, MTIME can be nil, which means the entry is always
3596 "Return the variable list for CLASS."
3600 "Collect directory-local variables from MODE-VARIABLES.
3601 VARIABLES is the initial list of variables.
3602 Returns the new list."
3607 ;; If variables are specified more than once, only use the last. (Why?)
3608 ;; The pseudo-variables mode and eval are different (bug#3430).
3611 ;; Need a new cons in case we setcdr later.
3615 "Collect entries from CLASS-VARIABLES into VARIABLES.
3616 ROOT is the root directory of the project.
3617 Return the new variables list."
3619 ;; Handle non-file buffers, too.
3622 ;; FIXME: Why not use file-relative-name?
3629 ;; Don't include this in the previous condition, because we
3630 ;; want to filter all strings before the next condition.
3644 ;; TODO someone might want to extend this to allow
3645 ;; integer values for subdir, where N means
3646 ;; variables apply to this directory and N levels
3647 ;; below it (0 == nil).
3650 alist variables))))))))
3652 ;; The file's content might be invalid (e.g. have a merge conflict), but
3653 ;; that shouldn't prevent the user from opening the file.
3655 nil))))
3658 "Declare that the DIRECTORY root is an instance of CLASS.
3659 DIRECTORY is the name of a directory, a string.
3660 CLASS is the name of a project class, a symbol.
3661 MTIME is either the modification time of the directory-local
3662 variables file that defined this class, or nil.
3664 When a file beneath DIRECTORY is visited, the mode-specific
3665 variables from CLASS are applied to the buffer. The variables
3666 for a class are defined using `dir-locals-set-class-variables'."
3673 "Map the type CLASS to a list of variable settings.
3674 CLASS is the project class, a symbol. VARIABLES is a list
3675 that declares directory-local variables for the class.
3676 An element in VARIABLES is either of the form:
3677 (MAJOR-MODE . ALIST)
3678 or
3679 (DIRECTORY . LIST)
3681 In the first form, MAJOR-MODE is a symbol, and ALIST is an alist
3682 whose elements are of the form (VARIABLE . VALUE).
3684 In the second form, DIRECTORY is a directory name (a string), and
3685 LIST is a list of the form accepted by the function.
3687 When a file is visited, the file's class is found. A directory
3688 may be assigned a class using `dir-locals-set-directory-class'.
3689 Then variables are set in the file's buffer according to the
3690 VARIABLES list of the class. The list is processed in order.
3692 * If the element is of the form (MAJOR-MODE . ALIST), and the
3693 buffer's major mode is derived from MAJOR-MODE (as determined
3694 by `derived-mode-p'), then all the variables in ALIST are
3695 applied. A MAJOR-MODE of nil may be used to match any buffer.
3696 `make-local-variable' is called for each variable before it is
3697 set.
3699 * If the element is of the form (DIRECTORY . LIST), and DIRECTORY
3700 is an initial substring of the file's directory, then LIST is
3701 applied by recursively following these rules."
3705 "File that contains directory-local variables.
3706 It has to be constant to enforce uniform values
3710 "Find the directory-local variables for FILE.
3711 This searches upward in the directory tree from FILE.
3712 It stops at the first directory that has been registered in
3713 `dir-locals-directory-cache' or contains a `dir-locals-file'.
3714 If it finds an entry in the cache, it checks that it is valid.
3715 A cache entry with no modification time element (normally, one that
3716 has been assigned directly using `dir-locals-set-directory-class', not
3717 set from a file) is always valid.
3718 A cache entry based on a `dir-locals-file' is valid if the modification
3719 time stored in the cache matches the current file modification time.
3720 If not, the cache entry is cleared so that the file will be re-read.
3722 This function returns either nil (no directory local variables found),
3723 or the matching entry from `dir-locals-directory-cache' (a list),
3724 or the full path to the `dir-locals-file' (a string) in the case
3725 of no valid cache entry."
3730 dir-locals-file))
3733 ;; `locate-dominating-file' may have abbreviated the name.
3736 ;; Let dir-locals-read-from-file inform us via demoted-errors
3737 ;; about unreadable files, etc.
3738 ;; Maybe we'd want to keep searching though - that is
3739 ;; a locate-dominating-file issue.
3740 ;;; (or (not (file-readable-p locals-file))
3741 ;;; (not (file-regular-p locals-file)))
3742 ;;; (setq locals-file nil))
3743 ;; Find the best cached value in `dir-locals-directory-cache'.
3754 ;; Found a potential cache entry. Check validity.
3755 ;; A cache entry with no MTIME is assumed to always be valid
3756 ;; (ie, set directly, not from a dir-locals file).
3757 ;; Note, we don't bother to check that there is a matching class
3758 ;; element in dir-locals-class-alist, since that's done by
3759 ;; dir-locals-set-directory-class.
3766 ;; This cache entry is OK.
3767 dir-elt
3768 ;; This cache entry is invalid; clear it.
3771 ;; Return the first existing dir-locals file. Might be the same
3772 ;; as dir-elt's, might not (eg latter might have been deleted).
3773 locals-file)
3774 ;; No cache entry.
3775 locals-file)))
3778 "Load a variables FILE and register a new class and instance.
3779 FILE is the name of the file holding the variables to apply.
3780 The new class name is the same as the directory in which FILE
3781 is found. Returns the new class name."
3793 class-name)))))
3796 "Non-nil means dir-local variables will be applied to remote files."
3804 "Read per-directory local variables for the current buffer.
3805 Store the directory-local variables in `dir-local-variables-alist'
3806 and `file-local-variables-alist', without applying them.
3808 This does nothing if either `enable-local-variables' or
3809 `enable-dir-local-variables' are nil."
3811 enable-dir-local-variables
3814 default-directory)))))
3815 ;; Find the variables file.
3845 "Apply directory-local variables to a non-file buffer.
3846 For non-file buffers, such as Dired buffers, directory-local
3847 variables are looked for in `default-directory' and its parent
3848 directories."
3852 \f
3855 However, the mode will not be changed if
3856 \(1) a local variables list or the `-*-' line specifies a major mode, or
3858 \ not suitable for ordinary files, or
3859 \(3) the new file name does not particularly specify any mode."
3864 "Change name of file visited in current buffer to FILENAME.
3865 This also renames the buffer to correspond to the new file.
3866 The next time the buffer is saved it will go in the newly specified file.
3867 FILENAME nil or an empty string means mark buffer as not visiting any file.
3868 Remember to delete the initial contents of the minibuffer
3869 if you wish to pass an empty string as the argument.
3871 The optional second argument NO-QUERY, if non-nil, inhibits asking for
3872 confirmation in the case where another buffer is already visiting FILENAME.
3874 The optional third argument ALONG-WITH-FILE, if non-nil, means that
3875 the old visited file has been renamed to the new name FILENAME."
3883 nil
3898 filename)))
3905 buffer-file-name filename)
3909 ;; If new-name == old-name, renaming would add a spurious <2>
3910 ;; and it's considered as a feature in rename-buffer.
3916 ;; Abbreviate the file names of the buffer.
3925 nil))
3926 ;; write-file-functions is normally used for things like ftp-find-file
3927 ;; that visit things that are not local files as if they were files.
3928 ;; Changing to visit an ordinary local file instead should flush the hook.
3933 ;; If buffer was read-only because of version control,
3934 ;; that reason is gone now, so make it writable.
3938 ;; Turn off backup files for certain file names.
3939 ;; Since this is a permanent local, the major mode won't eliminate it.
3941 backup-enable-predicate
3950 ;; If auto-save was not already on, turn it on if appropriate.
3953 ;; If auto save is on, start using a new name. We
3954 ;; deliberately don't rename or delete the old auto save
3955 ;; for the old visited file name. This is because
3956 ;; perhaps the user wants to save the new state and then
3957 ;; compare with the previous state from the auto save
3958 ;; file.
3960 ;; Rename the old auto save file if any.
3967 ;; Update the major mode, if the file name determines it.
3969 ;; Don't change the mode if it is special.
3972 ;; Don't change the mode if the local variable list specifies it.
3973 ;; The file name can influence whether the local variables apply.
3975 ;; h-l-v also checks it, but might as well be explicit.
3978 ;; TODO consider making normal-mode handle this case.
3986 "Write current buffer into file FILENAME.
3987 This makes the buffer visit that file, and marks it as not modified.
3989 If you specify just a directory name as FILENAME, that means to use
3990 the default file name but in that directory. You can also yank
3991 the default file name into the minibuffer to edit it, using \\<minibuffer-local-map>\\[next-history-element].
3993 If the buffer is not already visiting a file, the default file name
3994 for the output file is the buffer name.
3996 If optional second arg CONFIRM is non-nil, this function
3997 asks for confirmation before overwriting an existing file.
3998 Interactively, confirmation is required unless you supply a prefix argument."
3999 ;; (interactive "FWrite file: ")
4003 nil nil nil nil)
4007 default-directory)
4008 nil nil))
4012 ;; If arg is just a directory,
4013 ;; use the default file name, but in that directory.
4020 ;; NS does its own confirm dialog.
4023 use-dialog-box))
4028 ;; Make buffer writable if file is writable.
4033 ;; It's likely that the VC status at the new location is different from
4034 ;; the one at the old location.
4036 \f
4038 "Return an alist of extended attributes of file FILENAME.
4040 Extended attributes are platform-specific metadata about the file,
4041 such as SELinux context, list of ACL entries, etc."
4046 "Set extended attributes of file FILENAME to ATTRIBUTES.
4048 ATTRIBUTES must be an alist of file attributes as returned by
4049 `file-extended-attributes'."
4057 \f
4059 "Make a backup of the disk file visited by the current buffer, if appropriate.
4060 This is normally done before saving the buffer the first time.
4062 A backup may be done by renaming or by copying; see documentation of
4063 variable `make-backup-files'. If it's done by renaming, then the file is
4064 no longer accessible under its old name.
4066 The value is non-nil after a backup was made by renaming.
4067 It has the form (MODES EXTENDED-ATTRIBUTES BACKUPNAME).
4068 MODES is the result of `file-modes' on the original
4069 file; this means that the caller, after saving the buffer, should change
4070 the modes of the new file to agree with the old modes.
4071 EXTENDED-ATTRIBUTES is the result of `file-extended-attributes'
4072 on the original file; this means that the caller, after saving
4073 the buffer, should change the extended attributes of the new file
4074 to agree with the old attributes.
4075 BACKUPNAME is the backup file name, which is the old file renamed."
4082 backup-info backupname targets setmodes)
4083 ;; If specified name is a symbolic link, chase it to the target.
4084 ;; Thus we make the backups in the directory where the real file is.
4089 ;; (if (file-directory-p buffer-file-name)
4090 ;; (error "Cannot save buffer in directory %s" buffer-file-name))
4094 ;; If have old versions to maybe delete,
4095 ;; ask the user to confirm now, before doing anything.
4096 ;; But don't actually delete til later.
4101 real-file-name)))))
4105 ;; Actually write the back up file.
4108 ; (file-symlink-p buffer-file-name)
4109 backup-by-copying
4110 ;; Don't rename a suid or sgid file.
4123 real-file-name t))))))
4125 backupname modes
4126 extended-attributes)
4127 ;; rename-file should delete old backup.
4130 backupname)))
4132 ;; If trouble writing the backup, write it in
4133 ;; .emacs.d/%backup%.
4136 backupname)
4139 modes extended-attributes)))
4141 ;; Now delete the old versions, if desired.
4148 setmodes)
4152 ;; Create temp files with strict access rights. It's easy to
4153 ;; loosen them later, whereas it's impossible to close the
4154 ;; time-window of loose permissions otherwise.
4157 ;; Try to overwrite old backup first.
4165 nil)
4167 ;; The file was somehow created by someone else between
4168 ;; `delete-file' and `copy-file', so let's try again.
4169 ;; rms says "I think there is also a possible race
4170 ;; condition for making backup files" (emacs-devel 20070821).
4171 nil)))
4172 ;; If set-file-extended-attributes fails, fall back on set-file-modes.
4181 ;; The last ~[[:digit]]+ matches relative versions in git,
4182 ;; e.g. `foo.js.~HEAD~1~'.
4183 "Regular expression matching the backup/version part of a file name.
4187 "Return file NAME sans backup versions or strings.
4188 This is a separate procedure so your site-init or startup file can
4189 redefine it.
4190 If the optional argument KEEP-BACKUP-VERSION is non-nil,
4191 we do not remove backup version numbers, only true file version numbers.
4192 See also `file-name-version-regexp'."
4199 name))))))
4202 "Return t if deleting FILE and rewriting it would preserve the owner.
4203 Return nil if FILE does not exist, or if deleting and recreating it
4204 might not preserve the owner. If GROUP is non-nil, check whether
4205 the group would be preserved too."
4210 ;; Return t if the file doesn't exist, since it's true that no
4211 ;; information would be lost by an (attempted) delete and create.
4214 ;; Files created on Windows by Administrator (RID=500)
4215 ;; have the Administrators group (RID=544) recorded as
4216 ;; their owner. Rewriting them will still preserve the
4217 ;; owner.
4221 ;; On BSD-derived systems files always inherit the parent
4222 ;; directory's group, so skip the group-gid test.
4228 ;; On some systems, a file created in a setuid directory
4229 ;; inherits that directory's owner.
4233 ;; On many systems, a file created in a setgid directory
4234 ;; inherits that directory's group. On some systems
4235 ;; this happens even if the setgid bit is not set.
4242 The extension, in a file name, is the part that follows the last `.',
4243 except that a leading `.', if any, doesn't count."
4246 directory)
4250 ;; Don't use expand-file-name here; if DIRECTORY is relative,
4251 ;; we don't want to expand it.
4254 filename))))
4258 The extension, in a file name, is the part that follows the last `.',
4259 excluding version numbers and backup suffixes,
4260 except that a leading `.', if any, doesn't count.
4261 Return nil for extensionless file names such as `foo'.
4262 Return the empty string for file names such as `foo.'.
4264 If PERIOD is non-nil, then the returned value includes the period
4265 that delimits the extension, and if FILENAME has no extension,
4276 "Return the base name of the FILENAME: no directory, no extension.
4277 FILENAME defaults to `buffer-file-name'."
4282 #'make-backup-file-name--default-function
4283 "A function that `make-backup-file-name' uses to create backup file names.
4284 The function receives a single argument, the original file name.
4286 If you change this, you may need to change `backup-file-name-p' and
4287 `file-name-sans-versions' too.
4289 You could make this buffer-local to do something special for specific files.
4291 For historical reasons, a value of nil means to use the default function.
4292 This should not be relied upon.
4294 See also `backup-directory-alist'."
4301 "Alist of filename patterns and backup directory names.
4302 Each element looks like (REGEXP . DIRECTORY). Backups of files with
4303 names matching REGEXP will be made in DIRECTORY. DIRECTORY may be
4304 relative or absolute. If it is absolute, so that all matching files
4305 are backed up into the same directory, the file names in this
4306 directory will be the full name of the file backed up with all
4307 directory separators changed to `!' to prevent clashes. This will not
4308 work correctly if your filesystem truncates the resulting name.
4310 For the common case of all backups going into one directory, the alist
4312 directory name.
4314 If this variable is nil, or it fails to match a filename, the backup
4315 is made in the original file's directory.
4317 On MS-DOS filesystems without long names this variable is always
4318 ignored."
4324 "Default `backup-enable-predicate' function.
4325 Checks for files in `temporary-file-directory',
4326 `small-temporary-file-directory', and /tmp."
4328 caseless)
4329 ;; On MS-Windows, file-truename will convert short 8+3 aliases to
4330 ;; their long file-name equivalents, so compare-strings does TRT.
4334 caseless t))
4337 ;; Directory is under temporary-file-directory.
4342 ;; Directory is under /tmp.
4347 0 nil
4349 ;; Directory is under small-temporary-file-directory.
4354 "Create the non-numeric backup file name for FILE.
4355 This calls the function that `make-backup-file-name-function' specifies,
4356 with a single argument FILE."
4359 file))
4362 "Default function for `make-backup-file-name'.
4363 Normally this just returns FILE's name with `~' appended.
4364 It searches for a match for FILE in `backup-directory-alist'.
4365 If the directory for the backup doesn't exist, it is created."
4377 "Subroutine of `make-backup-file-name--default-function'.
4378 The function `find-backup-file-name' also uses this."
4380 elt backup-directory abs-backup-directory)
4385 alist nil)))
4386 ;; If backup-directory is relative, it should be relative to the
4387 ;; file's directory. By expanding explicitly here, we avoid
4388 ;; depending on default-directory.
4397 abs-backup-directory nil))))
4399 file
4403 ;; Normalize DOSish file names: downcase the drive
4404 ;; letter, if any, and replace the leading "x:" with
4405 ;; "/drive_x".
4408 ;; Replace any invalid file-name characters (for the
4409 ;; case of backing up remote files).
4413 "drive_"
4416 ""
4419 ;; Make the name unique by substituting directory
4420 ;; separators. It may not really be worth bothering about
4421 ;; doubling `!'s in the original name...
4426 backup-directory))
4431 "Return non-nil if FILE is a backup file name (numeric or not).
4432 This is a separate function so you can redefine it for customization.
4433 You may need to redefine `file-name-sans-versions' as well."
4438 ;; This is used in various files.
4439 ;; The usage of backup-extract-version-start is not very clean,
4440 ;; but I can't see a good alternative, so as of now I am leaving it alone.
4442 "Given the name of a numeric backup file, FN, return the backup number.
4443 Uses the free variable `backup-extract-version-start', whose value should be
4444 the index in the name where the version number begins."
4451 "Find a file name for a backup file FN, and suggestions for deletions.
4452 Value is a list whose car is the name for the backup file
4453 and whose cdr is a list of old versions to consider deleting now.
4454 If the value is nil, don't make a backup.
4455 Uses `backup-directory-alist' in the same way as
4456 `make-backup-file-name--default-function' does."
4458 ;; Run a handler for this function so that ange-ftp can refuse to do it.
4462 ;; We don't support numbered backups on plain MS-DOS
4463 ;; when long file names are unavailable.
4473 possibilities deserve-versions-p versions)
4476 base-versions
4479 possibilities)
4480 #'<)
4485 kept-old-versions
4486 kept-new-versions
4493 ;; Delete nothing if there is overflow
4494 ;; in the number of versions to keep.
4500 v))))))))))
4503 "Return number of names file FILENAME has."
4506 ;; (defun file-relative-name (filename &optional directory)
4507 ;; "Convert FILENAME to be relative to DIRECTORY (default: `default-directory').
4508 ;; This function returns a relative file name which is equivalent to FILENAME
4509 ;; when used with that default directory as the default.
4510 ;; If this is impossible (which can happen on MSDOS and Windows
4511 ;; when the file name and directory use different drive names)
4512 ;; then it returns FILENAME."
4513 ;; (save-match-data
4514 ;; (let ((fname (expand-file-name filename)))
4515 ;; (setq directory (file-name-as-directory
4516 ;; (expand-file-name (or directory default-directory))))
4517 ;; ;; On Microsoft OSes, if FILENAME and DIRECTORY have different
4518 ;; ;; drive names, they can't be relative, so return the absolute name.
4519 ;; (if (and (or (eq system-type 'ms-dos)
4520 ;; (eq system-type 'cygwin)
4521 ;; (eq system-type 'windows-nt))
4522 ;; (not (string-equal (substring fname 0 2)
4523 ;; (substring directory 0 2))))
4524 ;; filename
4525 ;; (let ((ancestor ".")
4526 ;; (fname-dir (file-name-as-directory fname)))
4527 ;; (while (and (not (string-match (concat "^" (regexp-quote directory)) fname-dir))
4528 ;; (not (string-match (concat "^" (regexp-quote directory)) fname)))
4529 ;; (setq directory (file-name-directory (substring directory 0 -1))
4530 ;; ancestor (if (equal ancestor ".")
4531 ;; ".."
4532 ;; (concat "../" ancestor))))
4533 ;; ;; Now ancestor is empty, or .., or ../.., etc.
4534 ;; (if (string-match (concat "^" (regexp-quote directory)) fname)
4535 ;; ;; We matched within FNAME's directory part.
4536 ;; ;; Add the rest of FNAME onto ANCESTOR.
4537 ;; (let ((rest (substring fname (match-end 0))))
4538 ;; (if (and (equal ancestor ".")
4539 ;; (not (equal rest "")))
4540 ;; ;; But don't bother with ANCESTOR if it would give us `./'.
4541 ;; rest
4542 ;; (concat (file-name-as-directory ancestor) rest)))
4543 ;; ;; We matched FNAME's directory equivalent.
4544 ;; ancestor))))))
4547 "Convert FILENAME to be relative to DIRECTORY (default: `default-directory').
4548 This function returns a relative file name which is equivalent to FILENAME
4549 when used with that default directory as the default.
4550 If FILENAME is a relative file name, it will be interpreted as existing in
4551 `default-directory'.
4552 If FILENAME and DIRECTORY lie on different machines or on different drives
4553 on a DOS/Windows machine, it returns FILENAME in expanded form."
4557 default-directory))))
4562 read-file-name-completion-ignore-case)))
4565 ;; Test for different filesystems on DOS/Windows
4567 ;; Should `cygwin' really be included here? --stef
4570 ;; Test for different drive letters
4572 ;; Test for UNCs on different servers
4577 ;; Windows file names cannot have ? in
4578 ;; them, so use that to detect when
4579 ;; neither FILENAME nor DIRECTORY is a
4580 ;; UNC.
4582 0 nil
4588 ;; Test for different remote file system identification
4590 filename
4598 ".."
4600 ;; Now ancestor is empty, or .., or ../.., etc.
4602 ;; We matched within FILENAME's directory part.
4603 ;; Add the rest of FILENAME onto ANCESTOR.
4606 ;; But don't bother with ANCESTOR if it would give us `./'.
4607 rest
4609 ;; We matched FILENAME's directory equivalent.
4610 ancestor))))))
4611 \f
4613 "Save current buffer in visited file if modified.
4614 Variations are described below.
4616 By default, makes the previous version into a backup file
4617 if previously requested or if this is the first save.
4619 to become a backup when the next save is done.
4621 unconditionally makes the previous version into a backup file.
4623 to become a backup when the next save is done,
4624 and unconditionally makes the previous version into a backup file.
4626 With a numeric prefix argument of 0, never make the previous version
4627 into a backup file.
4629 If a file's name is FOO, the names of its numbered backup versions are
4630 FOO.~i~ for various integers i. A non-numbered backup file is called FOO~.
4631 Numeric backups (rather than FOO~) will be made if value of
4632 `version-control' is not the atom `never' and either there are already
4633 numeric versions of the file being backed up, or `version-control' is
4634 non-nil.
4635 We don't want excessive versions piling up, so there are variables
4636 `kept-old-versions', which tells Emacs how many oldest versions to keep,
4637 and `kept-new-versions', which tells how many newest versions to keep.
4638 Defaults are 2 old versions and 2 new.
4639 `dired-kept-versions' controls dired's clean-directory (.) command.
4640 If `delete-old-versions' is nil, system will query user
4641 before trimming versions. Otherwise it does it silently.
4643 If `vc-make-backup-files' is nil, which is the default,
4644 no backup files are made for files managed by version control.
4645 (This is because the version control system itself records previous versions.)
4647 See the subroutine `basic-save-buffer' for more information."
4653 ;; We used to display the message below only for files > 50KB, but
4654 ;; then Rmail-mbox never displays it due to buffer swapping. If
4655 ;; the test is ever re-introduced, be sure to handle saving of
4656 ;; Rmail files.
4666 "Delete auto-save file for current buffer if `delete-auto-save-files' is t.
4667 Normally delete only if the file was written by this Emacs since
4668 the last real save, but optional arg FORCE non-nil means delete anyway."
4682 "Normal hook that is run before a buffer is saved to its file."
4688 "Normal hook that is run after a buffer is saved to its file."
4694 "If non-nil, use this coding system for saving the buffer.
4695 More precisely, use this coding system in place of the
4696 value of `buffer-file-coding-system', when saving the buffer.
4697 Calling `write-region' for any purpose other than saving the buffer
4698 will still use `buffer-file-coding-system'; this variable has no effect
4705 "Save the current buffer in its visited file, if it has been modified.
4706 The hooks `write-contents-functions' and `write-file-functions' get a chance
4707 to do the job of saving; if they do not, then the buffer is saved in
4708 the visited file in the usual way.
4709 Before and after saving the buffer, this function runs
4710 `before-save-hook' and `after-save-hook', respectively."
4713 ;; In an indirect buffer, save its base buffer instead.
4717 ;; handle the case when no modification has been made but
4718 ;; the file disappeared since visited
4722 setmodes)
4723 ;; If buffer has no file name, ask user for one.
4731 ;; Signal an error if the user specified the name of an
4732 ;; existing directory.
4735 filename))
4742 "%s has changed since visited or saved. Save anyway? "
4762 ;; Support VC version backups.
4764 ;; Don't let errors prevent saving the buffer.
4769 ;; If a hook returned t, file is already "written".
4770 ;; Otherwise, write it the usual way now.
4779 ;; Now we have saved the current buffer. Let's make sure
4780 ;; that buffer-file-coding-system is fixed to what
4781 ;; actually used for saving by binding it locally.
4796 ;; If the auto-save file was recent before this command,
4797 ;; delete it now.
4799 ;; Support VC `implicit' locking.
4806 ;; This does the "real job" of writing a buffer into its visited file
4807 ;; and making a backup file. This is what is normally done
4808 ;; but inhibited if one of write-file-functions returns non-nil.
4809 ;; It returns a value (MODES EXTENDED-ATTRIBUTES BACKUPNAME), like
4810 ;; backup-buffer.
4820 ;; This returns a value (MODES EXTENDED-ATTRIBUTES BACKUPNAME), like
4821 ;; backup-buffer.
4834 "File %s is write-protected; try to save anyway? "
4836 buffer-file-name)))
4851 ;; Write temp name, then rename it.
4852 ;; This requires write access to the containing dir,
4853 ;; which is why we don't try it if we don't have that access.
4855 tempname succeed
4858 ;; Create temp files with strict access rights. It's easy to
4859 ;; loosen them later, whereas it's impossible to close the
4860 ;; time-window of loose permissions otherwise.
4865 ;; Try various temporary names.
4866 ;; This code follows the example of make-temp-file,
4867 ;; but it calls write-region in the appropriate way
4868 ;; for saving the buffer.
4874 ;; Pass in nil&nil rather than point-min&max
4875 ;; cause we're saving the whole buffer.
4876 ;; write-region-annotate-functions may use it.
4878 tempname nil realname
4881 nil)
4883 ;; The file was somehow created by someone else between
4884 ;; `make-temp-name' and `write-region', let's try again.
4885 nil)
4887 ;; Reset the umask.
4889 ;; If we failed, restore the buffer's modtime.
4892 ;; Since we have created an entirely new file,
4893 ;; make sure it gets the right permission bits set.
4898 buffer-file-name)))
4899 ;; We succeeded in writing the temp file,
4900 ;; so rename it.
4902 ;; If file not writable, see if we can make it writable
4903 ;; temporarily while we write it.
4904 ;; But no need to do so if we have just backed it up
4905 ;; (setmodes is set) because that says we're superseding.
4907 ;; Change the mode back, after writing.
4910 buffer-file-name))
4911 ;; If set-file-extended-attributes fails, fall back on
4912 ;; set-file-modes.
4922 ;; Pass in nil&nil rather than point-min&max to indicate
4923 ;; we're saving the buffer rather than just a region.
4924 ;; write-region-annotate-functions may make us of it.
4926 buffer-file-name nil t buffer-file-truename)
4929 ;; If we get an error writing the new file, and we made
4930 ;; the backup by renaming, undo the backing-up.
4935 setmodes))
4941 `((?\C-r
4948 ;; Return nil to ask about BUF again.
4949 nil)
4962 ;; Return nil to ask about BUF again.
4963 nil)
4973 "Save some modified file-visiting buffers. Asks user about each one.
4974 You can answer `y' to save, `n' not to save, `C-r' to look at the
4975 buffer in question with `view-buffer' before deciding or `d' to
4976 view the differences using `diff-buffer-with-file'.
4978 This command first saves any buffers where `buffer-save-without-query' is
4979 non-nil, without asking.
4981 Optional argument (the prefix) non-nil means save all with no questions.
4982 Optional second argument PRED determines which buffers are considered:
4983 If PRED is nil, all the file-visiting buffers are considered.
4984 If PRED is t, then certain non-file buffers will also be considered.
4985 If PRED is a zero-argument function, it indicates for each buffer whether
4986 to consider it or not when called with that buffer current.
4988 See `save-some-buffers-action-alist' if you want to
4989 change the additional actions you can take on files."
4993 files-done abbrevs-done)
4995 ;; First save any buffers that we're supposed to save unconditionally.
4996 ;; That way the following code won't ask about them.
5001 ;; Ask about those buffers that merit it,
5002 ;; and record the number thus saved.
5006 ;; Note that killing some buffers may kill others via
5007 ;; hooks (e.g. Rmail and its viewing buffer).
5020 t
5032 save-some-buffers-action-alist))
5033 ;; Maybe to save abbrevs, and record whether
5034 ;; we either saved them or asked to.
5041 ;; Don't keep bothering user if he says no.
5055 \f
5057 "Clear out records of last mod time of visited file.
5058 Next attempt to save will certainly not complain of a discrepancy."
5062 "Mark current buffer as unmodified, not needing to be saved.
5065 It is not a good idea to use this function in Lisp programs, because it
5066 prints a message in the minibuffer. Instead, use `set-buffer-modified-p'."
5074 "Change whether this buffer is read-only."
5082 "Insert contents of file FILENAME into buffer after point.
5083 Set mark after the inserted text.
5085 This function is meant for the user to run interactively.
5086 Don't call it from programs! Use `insert-file-contents' instead.
5087 \(Its calling sequence is different; see its documentation)."
5093 "Append the contents of the region to the end of file FILENAME.
5094 When called from a function, expects three arguments,
5095 START, END and FILENAME. START and END are normally buffer positions
5096 specifying the part of the buffer to write.
5097 If START is nil, that means to use the entire buffer contents.
5098 If START is a string, then output that string to the file
5099 instead of any buffer contents; END is ignored.
5101 This does character code conversion and applies annotations
5102 like `write-region' does."
5108 "Return most recent backup file for FILENAME or nil if no backups exist."
5109 ;; `make-backup-file-name' will get us the right directory for
5110 ;; ordinary or numeric backups. It might create a directory for
5111 ;; backups as a side-effect, according to `backup-directory-alist'.
5118 tem)
5127 newest))
5130 "Rename current buffer to a similar name not already taken.
5131 This function is useful for creating multiple shell process buffers
5132 or multiple mail buffers, etc.
5134 Note that some commands, in particular those based on `compilation-mode'
5135 \(`compile', `grep', etc.) will reuse the current buffer if it has the
5136 appropriate mode even if it has been renamed. So as well as renaming
5137 the buffer, you also need to switch buffers before running another
5138 instance of such commands."
5146 ;; If the existing buffer name has a <NNN>,
5147 ;; which isn't part of the file name (if any),
5148 ;; then get rid of that.
5154 "Create the directory DIR and optionally any nonexistent parent dirs.
5155 If DIR already exists as a directory, signal an error, unless
5156 PARENTS is non-nil.
5158 Interactively, the default choice of directory to create is the
5159 current buffer's default directory. That is useful when you have
5160 visited a file in a nonexistent directory.
5162 Noninteractively, the second (optional) argument PARENTS, if
5163 non-nil, says whether to create parent directories that don't
5164 exist. Interactively, this happens by default.
5166 If creating the directory or directories fail, an error will be
5167 raised."
5170 nil nil)
5171 t))
5172 ;; If default-directory is a remote directory,
5173 ;; make sure we find its make-directory handler.
5181 create-list)
5183 ;; If directory is its own parent, then we can't
5184 ;; keep looping forever
5199 "Delete the directory named DIRECTORY. Does not follow symlinks.
5200 If RECURSIVE is non-nil, all files in DIRECTORY are deleted as well.
5201 TRASH non-nil means to trash the directory instead, provided
5202 `delete-by-moving-to-trash' is non-nil.
5204 When called interactively, TRASH is t if no prefix argument is
5205 given. With a prefix argument, TRASH is nil."
5212 "Move directory to trash: "
5214 default-directory default-directory nil nil))))
5220 nil)
5222 ;; If default-directory is a remote directory, make sure we find its
5223 ;; delete-directory handler.
5230 ;; Only move non-empty dir to trash if recursive deletion was
5231 ;; requested. This mimics the non-`delete-by-moving-to-trash'
5232 ;; case, where the operation fails in delete-directory-internal.
5233 ;; As `move-file-to-trash' trashes directories (empty or
5234 ;; otherwise) as a unit, we do not need to recurse here.
5236 ;; Check if directory is empty apart from "." and "..".
5241 ;; Otherwise, call ourselves recursively if needed.
5245 ;; This test is equivalent to
5246 ;; (and (file-directory-p fn) (not (file-symlink-p fn)))
5247 ;; but more efficient
5251 ;; We do not want to delete "." and "..".
5257 "Return non-nil if files FILE1 and FILE2 name the same file.
5258 If FILE1 or FILE2 does not exist, the return value is unspecified."
5269 "Return non-nil if FILE is in DIR or a subdirectory of DIR.
5271 Return nil if DIR is not an existing directory."
5293 "Copy DIRECTORY to NEWNAME. Both args must be strings.
5294 This function always sets the file modes of the output files to match
5295 the corresponding input file.
5297 The third arg KEEP-TIME non-nil means give the output files the same
5298 last-modified time as the old ones. (This works on only some systems.)
5300 A prefix arg makes KEEP-TIME non-nil.
5302 Noninteractively, the last argument PARENTS says whether to
5303 create parent directories if they don't exist. Interactively,
5304 this happens by default.
5306 If NEWNAME names an existing directory, copy DIRECTORY as a
5307 subdirectory there. However, if called from Lisp with a non-nil
5308 optional argument COPY-CONTENTS, copy the contents of DIRECTORY
5309 directly into NEWNAME instead."
5316 default-directory default-directory nil nil)
5317 current-prefix-arg t nil)))
5320 directory newname))
5321 ;; If default-directory is a remote directory, make sure we find its
5322 ;; copy-directory handler.
5327 newname keep-time parents copy-contents)
5329 ;; Compute target name.
5334 ;; If NEWNAME is not an existing directory, create it;
5335 ;; that is where we will copy the files of DIRECTORY.
5337 ;; If NEWNAME is an existing directory and COPY-CONTENTS
5338 ;; is nil, copy into NEWNAME/[DIRECTORY-BASENAME].
5343 newname))
5347 newname))
5350 ;; Copy recursively.
5352 ;; We do not want to copy "." and "..".
5354 directory-files-no-dot-files-regexp))
5364 ;; Set directory attributes.
5370 \f
5371 ;; At time of writing, only info uses this.
5373 "Return a copy of DIRS with all non-existent directories removed.
5374 The optional argument KEEP is a list of directories to retain even if
5375 they don't exist, and REJECT is a list of directories to remove from
5376 DIRS, even if they exist; REJECT takes precedence over KEEP.
5378 Note that membership in REJECT and KEEP is checked using simple string
5379 comparison."
5385 dirs)))
5387 \f
5390 "Function to use to revert this buffer.
5391 The function receives two arguments IGNORE-AUTO and NOCONFIRM,
5392 which are the arguments that `revert-buffer' received.
5393 It also has access to the `preserve-modes' argument of `revert-buffer'
5394 via the `revert-buffer-preserve-modes' dynamic variable.
5396 For historical reasons, a value of nil means to use the default function.
5401 #'revert-buffer-insert-file-contents--default-function
5402 "Function to use to insert contents when reverting this buffer.
5403 The function receives two arguments: the first the nominal file name to use;
5404 the second is t if reading the auto-save file.
5406 The function is responsible for updating (or preserving) point.
5408 For historical reasons, a value of nil means to use the default function.
5412 "Default function to use for `buffer-stale-function'.
5413 This function ignores its argument.
5414 This returns non-nil if the current buffer is visiting a readable file
5415 whose modification time does not match that of the buffer.
5417 This function only handles buffers that are visiting files.
5418 Non-file buffers need a custom function"
5424 "Function to check whether a buffer needs reverting.
5425 This should be a function with one optional argument NOCONFIRM.
5426 Auto Revert Mode passes t for NOCONFIRM. The function should return
5427 non-nil if the buffer should be reverted. A return value of
5428 `fast' means that the need for reverting was not checked, but
5429 that reverting the buffer is fast. The buffer is current when
5430 this function is called.
5432 The idea behind the NOCONFIRM argument is that it should be
5433 non-nil if the buffer is going to be reverted without asking the
5434 user. In such situations, one has to be careful with potentially
5435 time consuming operations.
5437 For historical reasons, a value of nil means to use the default function.
5438 This should not be relied upon.
5440 For more information on how this variable is used by Auto Revert mode,
5444 "Normal hook for `revert-buffer' to run before reverting.
5445 The function `revert-buffer--default' runs this.
5449 "Normal hook for `revert-buffer' to run after reverting.
5450 Note that the hook value that it runs is the value that was in effect
5451 before reverting; that makes a difference if you have buffer-local
5452 hook functions.
5454 The function `revert-buffer--default' runs this.
5462 ;; `revert-buffer-function' was defined long ago to be a function of only
5463 ;; 2 arguments, so we have to use a dynbind variable to pass the
5464 ;; `preserve-modes' argument of `revert-buffer'.
5468 "Replace current buffer text with the text of the visited file on disk.
5469 This undoes all changes since the file was visited or saved.
5470 With a prefix argument, offer to revert from latest auto-save file, if
5471 that is more recent than the visited file.
5473 This command also implements an interface for special buffers
5474 that contain text which doesn't come from a file, but reflects
5475 some other data instead (e.g. Dired buffers, `buffer-list'
5476 buffers). This is done via the variable `revert-buffer-function'.
5477 In these cases, it should reconstruct the buffer contents from the
5478 appropriate data.
5480 When called from Lisp, the first argument is IGNORE-AUTO; only offer
5481 to revert from the auto-save file when this is nil. Note that the
5482 sense of this argument is the reverse of the prefix argument, for the
5483 sake of backward compatibility. IGNORE-AUTO is optional, defaulting
5484 to nil.
5486 Optional second argument NOCONFIRM means don't ask for confirmation
5487 at all. (The variable `revert-without-query' offers another way to
5488 revert buffers without querying for confirmation.)
5490 Optional third argument PRESERVE-MODES non-nil means don't alter
5491 the files modes. Normally we reinitialize them using `normal-mode'.
5493 This function binds `revert-buffer-in-progress-p' non-nil while it operates.
5495 This function calls the function that `revert-buffer-function' specifies
5496 to do the work, with arguments IGNORE-AUTO and NOCONFIRM.
5497 The default function runs the hooks `before-revert-hook' and
5498 `after-revert-hook'."
5499 ;; I admit it's odd to reverse the sense of the prefix argument, but
5500 ;; there is a lot of code out there which assumes that the first
5501 ;; argument should be t to avoid consulting the auto-save file, and
5502 ;; there's no straightforward way to encourage authors to notice a
5503 ;; reversal of the argument sense. So I'm just changing the user
5504 ;; interface, but leaving the programmatic interface the same.
5509 ignore-auto noconfirm)))
5512 "Default function for `revert-buffer'.
5513 The arguments IGNORE-AUTO and NOCONFIRM are as described for `revert-buffer'.
5514 Runs the hooks `before-revert-hook' and `after-revert-hook' at the
5515 start and end.
5517 Calls `revert-buffer-insert-file-contents-function' to reread the
5518 contents of the visited file, with two arguments: the first is the file
5519 name, the second is non-nil if reading an auto-save file.
5521 This function only handles buffers that are visiting files.
5522 Non-file buffers need a custom function."
5527 buffer-auto-save-file-name
5532 buffer-auto-save-file-name
5533 buffer-file-name)))
5543 file-name)))
5545 ;; If file was backed up but has changed since,
5546 ;; we should make another backup.
5550 ;; Effectively copy the after-revert-hook status,
5551 ;; since after-find-file will clobber it.
5554 after-revert-hook))
5556 ;; FIXME: Throw away undo-log when preserve-modes is nil?
5560 file-name auto-save-p)
5561 ;; Recompute the truename in case changes in symlinks
5562 ;; have changed the truename.
5566 ;; Run after-revert-hook as it was before we reverted.
5570 local-hook)
5573 t)))))
5576 "Default function for `revert-buffer-insert-file-contents-function'.
5577 The function `revert-buffer--default' calls this.
5578 FILE-NAME is the name of the file. AUTO-SAVE-P is non-nil if this is
5579 an auto-save file."
5583 "File %s no longer exists!"
5585 file-name))
5588 "File %s no longer readable!"
5590 file-name))
5592 ;; Bind buffer-file-name to nil
5593 ;; so that we don't try to lock the file.
5599 ;; Auto-saved file should be read by Emacs's
5600 ;; internal coding.
5604 buffer-file-coding-system-explicit
5607 coding-system-for-read
5609 coding-system-for-read)
5611 ;; As a coding system suitable for multibyte
5612 ;; buffer is specified, make the current
5613 ;; buffer multibyte.
5616 ;; This force after-insert-file-set-coding
5617 ;; (called from insert-file-contents) to set
5618 ;; buffer-file-coding-system to a proper value.
5621 ;; Note that this preserves point in an intelligent way.
5625 nil nil t))
5627 nil nil t))))))
5630 "Recover the visited file--get contents from its last auto-save file."
5635 "Visit file FILE, but get contents from its last auto-save file."
5636 ;; Actually putting the file name in the minibuffer should be used
5637 ;; only rarely.
5638 ;; Not just because users often use the default.
5651 "*Directory*" nil
5662 ;; Use insert-directory-safely, not insert-directory,
5663 ;; because these files might not exist. In particular,
5664 ;; FILE might not exist if the auto-save file was for
5665 ;; a buffer that didn't visit a file, such as "*mail*".
5666 ;; The code in v20.x called `ls' directly, so we need
5667 ;; to emulate what `ls' did in that case.
5672 ;; Keep the current buffer-file-coding-system.
5674 ;; Auto-saved file should be read with special coding.
5683 "Recover auto save files from a previous Emacs session.
5684 This command first displays a Dired buffer showing you the
5685 previous sessions that you could recover from.
5686 To choose one, move point to the proper line and then type C-c C-c.
5687 Then you'll be asked about a number of files to recover."
5697 directory-files-no-dot-files-regexp
5699 t)
5710 ;; Each line starts with a space
5711 ;; so that Font Lock mode won't highlight the first character.
5714 " To delete a session file, type \
5720 "Choose one saved session to recover auto-save files from.
5721 This command is used in the special Dired buffer created by
5724 ;; Get the name of the session file to recover from.
5726 files
5732 ;; Read in the auto-save-list file.
5735 ;; Loop thru the text of that file
5736 ;; and get out the names of the files to recover.
5740 ;; This is a pair of lines for a non-file-visiting buffer.
5741 ;; Get the auto-save file name and manufacture
5742 ;; a "visited file name" from that.
5745 ;; If there is no auto-save file name, the
5746 ;; auto-save-list file is probably corrupted.
5759 ;; This pair of lines is a file-visiting
5760 ;; buffer. Use the visited file name.
5770 ;; Ignore a file if its auto-save file does not exist now.
5774 ;; The file contains a pair of line for each auto-saved buffer.
5775 ;; The first line of the pair contains the visited file name
5776 ;; or is empty if the buffer was not visiting a file.
5777 ;; The second line is the auto-save file name.
5785 files
5791 "Kill BUFFER if confirmed."
5799 "Kill some buffers. Asks the user whether to kill each one of them.
5800 Non-interactively, if optional argument LIST is non-nil, it
5801 specifies the list of buffers to kill, asking for approval for each one."
5809 ; if we killed the base buffer.
5816 "Kill buffers whose name matches the specified REGEXP.
5817 The optional second argument indicates whether to kill internal buffers too."
5826 \f
5828 "Adjust current buffer's auto save file name for current conditions.
5829 Also rename any existing auto save file, if it was made in this session."
5841 "Return file name to use for auto-saves of current buffer.
5842 Does not consider `auto-save-visited-file-name' as that variable is checked
5843 before calling this function. You can redefine this for customization.
5844 See also `auto-save-file-name-p'."
5852 result uniq)
5853 ;; Apply user-specified translations
5854 ;; to the file name.
5858 filename)
5868 filename))))
5873 ;; We truncate the file name to DOS 8+3 limits
5874 ;; before doing anything else, because the regexp
5875 ;; passed to string-match below cannot handle
5876 ;; extensions longer than 3 characters, multiple
5877 ;; dots, and other atrocities.
5882 fn)
5887 "#"
5890 ;; Make sure auto-save file names don't contain characters
5891 ;; invalid for the underlying filesystem.
5893 ;; Don't modify remote (ange-ftp) filenames
5896 result))))
5898 ;; Deal with buffers that don't have any associated files. (Mail
5899 ;; mode tends to create a good number of these.)
5903 file-name)
5904 ;; Restrict the characters used in the file name to those which
5905 ;; are known to be safe on all filesystems, url-encoding the
5906 ;; rest.
5907 ;; We do this on all platforms, because even if we are not
5908 ;; running on DOS/Windows, the current directory may be on a
5909 ;; mounted VFAT filesystem, such as a USB memory stick.
5913 ;; For multibyte characters, this will produce more than
5914 ;; 2 hex digits, so is not true URL encoding.
5918 ;; Generate the file name.
5924 ;; Try a few alternative directories, to get one we can
5925 ;; write it.
5931 ;; Don't modify remote (ange-ftp) filenames
5933 ;; The call to convert-standard-filename is in case
5934 ;; buffer-name includes characters not allowed by the
5935 ;; DOS/Windows filesystems. make-temp-file writes to the
5936 ;; file it creates, so we must fix the file name _before_
5937 ;; make-temp-file is called.
5939 fname))
5941 ;; make-temp-file creates the file,
5942 ;; but we don't want it to exist until we do an auto-save.
5946 file-name)))
5949 "Return non-nil if FILENAME can be yielded by `make-auto-save-file-name'.
5950 FILENAME should lack slashes. You can redefine this for customization."
5952 \f
5954 "Given a shell file name pattern WILDCARD, return an equivalent regexp.
5955 The generated regexp will match a filename only if the filename
5956 matches that wildcard according to shell rules. Only wildcards known
5957 by `sh' are supported."
5959 ;; Copy the initial run of non-special characters.
5962 ;; If no special characters, we're almost done.
5966 j)
5968 result
5989 ;; Found "[^". Insert a `\0' character
5990 ;; (which cannot happen in a filename)
5991 ;; into the character class, so that `^'
5992 ;; is not the first character after `[',
5993 ;; and thus non-special in a regexp.
5998 ;; I don't think `]' can appear in a
5999 ;; character class in a wildcard, but
6000 ;; let's be general here.
6007 i
6020 ;; Shell wildcards should match the entire filename,
6021 ;; not its part. Make the regexp say so.
6023 \f
6026 "Switches for `list-directory' to pass to `ls' for brief listing."
6032 "Switches for `list-directory' to pass to `ls' for verbose listing."
6037 "Expand wildcard pattern PATTERN.
6038 This returns a list of file names which match the pattern.
6040 If PATTERN is written as an absolute file name,
6041 the values are absolute also.
6043 If PATTERN is written as a relative file name, it is interpreted
6044 relative to the current default directory, `default-directory'.
6045 The file names returned are normally also relative to the current
6046 default directory. However, if FULL is non-nil, they are absolute."
6050 ;; A list of all dirs that DIRPART specifies.
6051 ;; This can be more than one dir
6052 ;; if DIRPART contains wildcards.
6056 dirpart)))
6060 contents)
6065 ;; Filter out "." and ".."
6070 name))
6077 this-dir-contents)
6078 this-dir-contents)
6079 contents)))))
6080 contents)))
6082 ;; Let Tramp know that `file-expand-wildcards' does not need an advice.
6086 "Display a list of files in or matching DIRNAME, a la `ls'.
6087 DIRNAME is globbed by the shell if necessary.
6088 Prefix arg (second arg if noninteractive) means supply -l switch to `ls'.
6089 Actions controlled by variables `list-directory-brief-switches'
6090 and `list-directory-verbose-switches'."
6094 nil default-directory nil)
6095 pfx)))
6097 list-directory-brief-switches))
6098 buffer)
6110 ;; Finishing with-output-to-temp-buffer seems to clobber default-directory.
6118 "Quote characters special to the shell in PATTERN, leave wildcards alone.
6120 PATTERN is assumed to represent a file-name wildcard suitable for the
6121 underlying filesystem. For Unix and GNU/Linux, each character from the
6123 the parts of the pattern which don't include wildcard characters are
6124 quoted with double quotes.
6127 on Windows), so PATTERN can use them to quote wildcard characters that
6128 need to be passed verbatim to shell commands."
6132 ;; DOS/Windows don't allow `"' in file names. So if the
6133 ;; argument has quotes, we can safely assume it is already
6134 ;; quoted by the caller.
6136 ;; We quote [&()#$`'] in case their shell is a port of a
6137 ;; Unixy shell. We quote [,=+] because stock DOS and
6138 ;; Windows shells require that in some cases, such as
6139 ;; passing arguments to batch files that use positional
6140 ;; arguments like %1.
6142 pattern
6145 end)
6162 pattern))))
6169 "Program to get the amount of free space on a file system.
6170 We assume the output has the format of `df'.
6171 The value of this variable must be just a command name or file name;
6172 if you want to specify options, use `directory-free-space-args'.
6174 A value of nil disables this feature.
6176 If the function `file-system-info' is defined, it is always used in
6177 preference to the program given by this variable."
6183 "Options to use when running `directory-free-space-program'."
6188 "Return the amount of free space on directory DIR's file system.
6189 The return value is a string describing the amount of free
6190 space (normally, the number of free 1KB blocks).
6192 This function calls `file-system-info' if it is available, or
6193 invokes the program specified by `directory-free-space-program'
6194 and `directory-free-space-args'. If the system call or program
6195 is unsuccessful, or if DIR is a remote directory, this function
6196 returns nil."
6198 ;; Try to find the number of free blocks. Non-Posix systems don't
6199 ;; always have df, but might have an equivalent system call.
6208 ;; Avoid failure if the default directory does
6209 ;; not exist (Bug#2631, Bug#3911).
6213 nil t nil
6214 directory-free-space-args
6217 ;; Assume that the "available" column is before the
6218 ;; "capacity" column. Find the "%" and scan backward.
6222 "[[:space:]]+[^[:space:]]+%[^%]*$"
6229 ;; The following expression replaces `dired-move-to-filename-regexp'.
6233 ;; In some locales, month abbreviations are as short as 2 letters,
6234 ;; and they can be followed by ".".
6235 ;; In Breton, a month name can include a quote character.
6248 s "+"
6251 ;; Japanese MS-Windows ls-lisp has one-digit months, and
6252 ;; omits the Kanji characters after month and day-of-month.
6253 ;; On Mac OS X 10.3, the date format in East Asian locales is
6254 ;; day-of-month digits followed by month digits.
6260 ;; The "[0-9]" below requires the previous column to end in a digit.
6261 ;; This avoids recognizing `1 may 1997' as a date in the line:
6262 ;; -r--r--r-- 1 may 1997 1168 Oct 19 16:49 README
6264 ;; The "[BkKMGTPEZY]?" below supports "ls -alh" output.
6266 ;; For non-iso date formats, we add the ".*" in order to find
6267 ;; the last possible match. This avoids recognizing
6268 ;; `jservice 10 1024' as a date in the line:
6269 ;; drwxr-xr-x 3 jservice 10 1024 Jul 2 1997 esg-host
6271 ;; vc dired listings provide the state or blanks between file
6272 ;; permissions and date. The state is always surrounded by
6273 ;; parentheses:
6274 ;; -rw-r--r-- (modified) 2005-10-22 21:25 files.el
6275 ;; This is not supported yet.
6280 "Regular expression to match up to the file name in a directory listing.
6281 The default value is designed to recognize dates and times
6286 ;; insert-directory
6287 ;; - must insert _exactly_one_line_ describing FILE if WILDCARD and
6288 ;; FULL-DIRECTORY-P is nil.
6289 ;; The single line of output must display FILE's name as it was
6290 ;; given, namely, an absolute path name.
6291 ;; - must insert exactly one line for each file if WILDCARD or
6292 ;; FULL-DIRECTORY-P is t, plus one optional "total" line
6293 ;; before the file lines, plus optional text after the file lines.
6294 ;; Lines are delimited by "\n", so filenames containing "\n" are not
6295 ;; allowed.
6296 ;; File lines should display the basename.
6297 ;; - must be consistent with
6298 ;; - functions dired-move-to-filename, (these two define what a file line is)
6299 ;; dired-move-to-end-of-filename,
6300 ;; dired-between-files, (shortcut for (not (dired-move-to-filename)))
6301 ;; dired-insert-headerline
6302 ;; dired-after-subdir-garbage (defines what a "total" line is)
6303 ;; - variable dired-subdir-regexp
6304 ;; - may be passed "--dired" as the first argument in SWITCHES.
6305 ;; Filename handlers might have to remove this switch if their
6306 ;; "ls" command does not support it.
6308 "Insert directory listing for FILE, formatted according to SWITCHES.
6309 Leaves point after the inserted text.
6310 SWITCHES may be a string of options, or a list of strings
6311 representing individual options.
6312 Optional third arg WILDCARD means treat FILE as shell wildcard.
6313 Optional fourth arg FULL-DIRECTORY-P means file is a directory and
6314 switches do not contain `d', so that a full listing is expected.
6316 This works by running a directory listing program
6317 whose name is in the variable `insert-directory-program'.
6318 If WILDCARD, it also runs the shell specified by `shell-file-name'.
6320 When SWITCHES contains the long `--dired' option, this function
6321 treats it specially, for the sake of dired. However, the
6322 normally equivalent short `-D' option is just passed on to
6323 `insert-directory-program', as any other option."
6324 ;; We need the directory in order to find the right handler.
6329 wildcard full-directory-p)
6332 ;; Read the actual directory using `insert-directory-program'.
6333 ;; RESULT gets the status code.
6335 ;; putting text property `dired-filename, decode one
6336 ;; bunch by one to preserve that property.
6338 ;; This is to control encoding the arguments in call-process.
6342 default-file-name-coding-system))))
6345 ;; Run ls in the directory part of the file pattern
6346 ;; using the last component as argument.
6352 ;; NB since switches is passed to the shell, be
6353 ;; careful of malicious values, eg "-l;reboot".
6354 ;; See eg dired-safe-switches-p.
6356 shell-file-name nil t nil
6357 "-c"
6359 ""
6361 insert-directory-program
6362 " -d "
6364 switches
6366 " -- "
6367 ;; Quote some characters that have
6368 ;; special meanings in shells; but
6369 ;; don't quote the wildcards--we want
6370 ;; them to be special. We also
6371 ;; currently don't quote the quoting
6372 ;; characters in case people want to
6373 ;; use them explicitly to quote
6374 ;; wildcard characters.
6376 ;; SunOS 4.1.3, SVr4 and others need the "." to list the
6377 ;; directory if FILE is a symbolic link.
6385 insert-directory-program nil t nil
6389 ;; Split the switches at any spaces so we can
6390 ;; pass separate options as separate args.
6392 ;; Avoid lossage if FILE starts with `-'.
6400 file))))))))
6402 ;; If we got "//DIRED//" in the output, it means we got a real
6403 ;; directory listing, even if `ls' returned nonzero.
6404 ;; So ignore any errors.
6417 ;; The first time ls returns an error,
6418 ;; find the version numbers of ls,
6419 ;; and set insert-directory-ls-version
6420 ;; to > if it is more than 5.2.1, < if it is less, nil if it
6421 ;; is equal or if the info cannot be obtained.
6422 ;; (That can mean it isn't GNU ls.)
6432 comparison)
6448 ;; For GNU ls versions 5.2.2 and up, ignore minor errors.
6452 ;; If `insert-directory-program' failed, signal an error.
6454 ;; Delete the error message it may have output.
6456 ;; On non-Posix systems, we cannot open a directory, so
6457 ;; don't even try, because that will always result in
6458 ;; the ubiquitous "Access denied". Instead, show the
6459 ;; command line so the user can try to guess what went wrong.
6464 insert-directory-program
6466 file result)
6467 ;; Unix. Access the file to get a suitable error.
6474 ;; The following overshoots by one line for an empty
6475 ;; directory listed with "--dired", but without "-a"
6476 ;; switch, where the ls output contains a
6477 ;; "//DIRED-OPTIONS//" line, but no "//DIRED//" line.
6478 ;; We take care of that case later.
6486 error-lines)
6487 ;; Find all the lines that are error messages,
6488 ;; and record the bounds of each one.
6495 ;; Now read the numeric positions of file names.
6502 error-lines))
6505 error-lines)))
6507 ;; End is followed by \n or by " -> ".
6509 ;; It seems that we can't trust ls's output as to
6510 ;; byte positions of filenames.
6516 ;; Take care of the case where the ls output contains a
6517 ;; "//DIRED-OPTIONS//"-line, but no "//DIRED//"-line
6518 ;; and we went one line too far back (see above).
6523 ;; Now decode what read if necessary.
6525 file-name-coding-system
6526 default-file-name-coding-system
6528 coding-no-eol
6529 val pos)
6533 ;; If no coding system is specified or detection is
6534 ;; requested, detect the coding.
6548 ;; Force no eol conversion on a file name, so
6549 ;; that CR is preserved.
6557 ;; Try to insert the amount of free space.
6560 ;; First find the line to put it on.
6564 ;; Replace "total" with "used", to avoid confusion.
6570 "Convert `ls --dired' file name position value POS to a buffer position.
6571 File name position values returned in ls --dired output
6572 count only stdout; they don't count the error messages sent to stderr.
6573 So this function converts to them to real buffer positions.
6574 ERROR-LINES is a list of buffer positions of error message lines,
6575 of the form (START END)."
6579 pos)
6583 "Insert directory listing for FILE, formatted according to SWITCHES.
6585 Like `insert-directory', but if FILE does not exist, it inserts a
6586 message to that effect instead of signaling an error."
6589 ;; Simulate the message printed by `ls'.
6593 "Functions to call with no arguments to query about killing Emacs.
6594 If any of these functions returns nil, killing Emacs is canceled.
6595 `save-buffers-kill-emacs' calls these functions, but `kill-emacs',
6599 "How to ask for confirmation when leaving Emacs.
6600 If nil, the default, don't ask at all. If the value is non-nil, it should
6601 be a predicate function; for example `yes-or-no-p'."
6610 "Offer to save each buffer, then kill this Emacs process.
6611 With prefix ARG, silently save all file-visiting buffers without asking.
6612 If there are active processes where `process-query-on-exit-flag'
6613 returns non-nil, asks whether processes should be killed.
6614 Runs the members of `kill-emacs-query-functions' in turn and stops
6615 if any returns nil. If `confirm-kill-emacs' is non-nil, calls it."
6627 ;; process-list is not defined on MSDOS.
6629 active)
6647 ;; Query the user for other things, perhaps.
6654 "Offer to save each buffer, then kill the current connection.
6655 If the current frame has no client, kill Emacs itself.
6657 With prefix ARG, silently save all file-visiting buffers, then kill.
6659 If emacsclient was started with a list of filenames to edit, then
6660 only these files will be asked to be saved."
6665 \f
6666 ;; We use /: as a prefix to "quote" a file name
6667 ;; so that magic file name handlers will not apply to it.
6671 file-name-handler-alist))
6673 ;; We depend on being the last handler on the list,
6674 ;; so that anything else which does need handling
6675 ;; has been handled already.
6676 ;; So it is safe for us to inhibit *all* magic file name handlers.
6685 default-directory))
6686 ;; Get a list of the indices of the args which are file names.
6689 ;; The first six are special because they
6690 ;; return a file name. We want to include the /:
6691 ;; in the return value.
6692 ;; So just avoid stripping it in the first place.
6699 ;; `identity' means just return the first arg
6700 ;; not stripped of its quoting.
6702 ;; `add' means add "/:" to the result.
6705 ;; `unquote-then-quote' means set buffer-file-name
6706 ;; temporarily to unquoted filename.
6708 ;; List the arguments which are filenames.
6716 ;; For all other operations, treat the first argument only
6717 ;; as the file name.
6719 method
6720 ;; Copy ARGUMENTS so we can replace elements in it.
6724 ;; Strip off the /: from the file names that have it.
6732 "/"
6738 (`insert-file-contents
6744 (`unquote-then-quote
6749 \f
6750 ;; Symbolic modes and read-file-modes.
6753 "Convert CHAR to a numeric bit-mask for extracting mode bits.
6754 CHAR is in [ugoa] and represents the category of users (Owner, Group,
6755 Others, or All) for whom to produce the mask.
6756 The bit-mask that is returned extracts from mode bits the access rights
6757 for the specified category of users."
6765 "Convert CHAR to a numeric value of mode bits.
6766 CHAR is in [rwxXstugo] and represents symbolic access permissions.
6767 If CHAR is in [Xugo], the value is taken from FROM (or 0 if omitted)."
6774 ;; Rights relative to the previous file modes.
6785 "Convert a symbolic mode string specification to an equivalent number.
6787 WHO-MASK is the bit-mask specifying the category of users to which to
6788 apply the access permissions. See `file-modes-char-to-who'.
6789 FROM (or 0 if nil) gives the mode bits on which to base permissions if
6790 RIGHTS request to add, remove, or set permissions based on existing ones,
6797 char-right)
6804 num-rights
6808 op char-right)))
6809 num-rights))
6812 "Convert symbolic file modes to numeric file modes.
6813 MODES is the string to convert, it should match
6815 See Info node `(coreutils)File permissions' for more information on this
6816 notation.
6817 FROM (or 0 if nil) gives the mode bits on which to base permissions if
6818 MODES request to add, remove, or set permissions based on existing ones,
6832 num-who num-modes)
6835 num-modes)))
6838 "Read file modes in octal or symbolic notation and return its numeric value.
6839 PROMPT is used as the prompt, default to `File modes (octal or symbolic): '.
6840 ORIG-FILE is the name of a file on whose mode bits to base returned
6841 permissions if what user types requests to add, remove, or set permissions
6857 nil nil default)))
6866 ;; Trashcan handling.
6868 "Directory for `move-file-to-trash' to move files and directories to.
6869 This directory is only used when the function `system-move-file-to-trash'
6870 is not defined.
6871 Relative paths are interpreted relative to `default-directory'.
6872 If the value is nil, Emacs uses a freedesktop.org-style trashcan."
6882 "Move the file (or directory) named FILENAME to the trash.
6883 When `delete-by-moving-to-trash' is non-nil, this function is
6884 called by `delete-file' and `delete-directory' instead of
6885 deleting files outright.
6887 If the function `system-move-file-to-trash' is defined, call it
6888 with FILENAME as an argument.
6889 Otherwise, if `trash-directory' is non-nil, move FILENAME to that
6890 directory.
6891 Otherwise, trash FILENAME using the freedesktop.org conventions,
6892 like the GNOME, KDE and XFCE desktop environments. Emacs only
6896 ;; If `trash-directory' is non-nil, move the file there.
6900 trash-dir)))
6901 ;; We can't trash a parent directory of trash-directory.
6904 trash-dir filename))
6907 ;; Ensure that the trashed file-name is unique.
6914 ;; If `system-move-file-to-trash' is defined, use it.
6917 ;; Otherwise, use the freedesktop.org method, as specified at
6918 ;; http://freedesktop.org/wiki/Specifications/trash-spec
6929 ;; Check if we have permissions to delete.
6933 ;; The trashed file cannot be the trash dir or its parent.
6936 trash-files-dir filename))
6939 trash-info-dir filename))
6941 ;; Ensure that the trash directory exists; otherwise, create it.
6948 ;; Try to move to trash with .trashinfo undo information
6953 ;; Perform url-encoding on FN. For compatibility with
6954 ;; other programs (e.g. XFCE Thunar), allow literal "/"
6955 ;; for path separators.
6960 ?n ?o ?p ?q ?r ?s ?t ?u ?v ?w ?x ?y ?z ?A
6961 ?B ?C ?D ?E ?F ?G ?H ?I ?J ?K ?L ?M ?N ?O
6974 fn))
6979 ;; Attempt to make .trashinfo file, trying up to 5
6980 ;; times. The .trashinfo file is opened with O_EXCL,
6981 ;; as per trash-spec 0.7, even if that can be a problem
6982 ;; on old NFS versions...
6986 trash-files-dir))
6988 success info-fn)
6993 trash-info-dir))
7001 ;; Uniquify new-fn. (Some file managers do not
7002 ;; like Emacs-style backup file names---e.g. bug
7003 ;; 170956 in Konqueror bug tracker.)
7008 ;; Finally, try to move the file to the trashcan.
7012 \f
7037 ;;; files.el ends here