| blob | 9d46d5f85aa8463881ad3169f6c82d0ed233b053 |
1 ;;; files.el --- file input and output commands for Emacs -*- lexical-binding:t -*-
3 ;; Copyright (C) 1985-1987, 1992-2017 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 <https://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:
38 "Backups of edited data files."
42 "Finding files."
47 "Non-nil means delete auto-save file when a buffer is saved or killed.
49 Note that the auto-save file will not be deleted if the buffer is killed
50 when it has unsaved changes."
55 nil
56 "Alist of abbreviations for file directories.
57 A list of elements of the form (FROM . TO), each meaning to replace
58 a match for FROM with TO when a directory name matches FROM. This
59 replacement is done when setting up the default directory of a
60 newly visited file buffer.
62 FROM is a regexp that is matched against directory names anchored at
66 FROM and TO should be equivalent names, which refer to the
67 same directory. TO should be an absolute directory name.
68 Do not use `~' in the TO strings.
70 Use this feature when you have directories which you normally refer to
71 via absolute symbolic links. Make TO the name of the link, and FROM
72 a regexp matching the name it is linked to."
81 "Non-nil means make a backup of a file the first time it is saved.
82 This can be done by renaming the file or by copying.
84 Renaming means that Emacs renames the existing file so that it is a
85 backup file, then writes the buffer into a new file. Any other names
86 that the old file had will now refer to the backup file. The new file
87 is owned by you and its group is defaulted.
89 Copying means that Emacs copies the existing file into the backup
90 file, then writes the buffer on top of the existing file. Any other
91 names that the old file had will now refer to the new (edited) file.
92 The file's owner and group are unchanged.
94 The choice of renaming or copying is controlled by the variables
95 `backup-by-copying', `backup-by-copying-when-linked',
96 `backup-by-copying-when-mismatch' and
97 `backup-by-copying-when-privileged-mismatch'. See also `backup-inhibited'."
101 ;; Do this so that local variables based on the file name
102 ;; are not overridden by the major mode.
104 "If non-nil, backups will be inhibited.
105 This variable is intended for use by making it local to a buffer,
110 "Non-nil means always use copying to create backup files.
111 See documentation of variable `make-backup-files'."
116 "Non-nil means use copying to create backups for files with multiple names.
117 This causes the alternate names to refer to the latest version as edited.
118 This variable is relevant only if `backup-by-copying' is nil."
123 "Non-nil means create backups by copying if this preserves owner or group.
124 Renaming may still be used (subject to control of other variables)
125 when it would not result in changing the owner or group of the file;
126 that is, for files which are owned by you and whose group matches
127 the default for a new file created there by you.
128 This variable is relevant only if `backup-by-copying' is nil."
135 "Non-nil means create backups by copying to preserve a privileged owner.
136 Renaming may still be used (subject to control of other variables)
137 when it would not result in changing the owner of the file or if the owner
138 has a user id greater than the value of this variable. This is useful
139 when low-numbered uid's are used for special system users (such as root)
140 that must maintain ownership of certain files.
141 This variable is relevant only if `backup-by-copying' and
142 `backup-by-copying-when-mismatch' are nil."
147 "Predicate that looks at a file name and decides whether to make backups.
151 "Non-nil in a buffer means always offer to save buffer on exit.
152 Do so even if the buffer is not visiting a file.
153 Automatically local in all buffers.
155 Set to the symbol `always' to offer to save buffer whenever
156 `save-some-buffers' is called."
165 "Non-nil means find a file under alternative names, in existing buffers.
166 This means if any existing buffer is visiting the file you want
167 under another name, you get the existing buffer instead of a new buffer."
172 "Non-nil means visiting a file uses its truename as the visited-file name.
173 That is, the buffer visiting the file has the truename as the
174 value of `buffer-file-name'. The truename of a file is found by
175 chasing all links both at the file level and at the levels of the
176 containing directories."
182 "Specify which files should be reverted without query.
183 The value is a list of regular expressions.
184 If the file name matches one of these regular expressions,
185 then `revert-buffer' reverts the file without querying
186 if the file has changed on disk and you have not edited the buffer."
191 "The device number and file number of the file visited in the current buffer.
192 The value is a list of the form (FILENUM DEVNUM).
193 This pair of numbers uniquely identifies the file.
207 "The directory for writing small temporary files.
208 If non-nil, this directory is used instead of `temporary-file-directory'
209 by programs that create small temporary files. This is for systems that
210 have fast storage with limited space, such as a RAM disk."
215 ;; The system null device. (Should reference NULL_DEVICE from C.)
242 "Non-nil means protect against I/O errors while saving files.
243 Some modes set this non-nil in particular buffers.
245 This feature works by writing the new contents into a temporary file
246 and then renaming the temporary file to replace the original.
247 In this way, any I/O error in writing leaves the original untouched,
248 and there is never any instant where the file is nonexistent.
250 Note that this feature forces backups to be made by copying.
251 Yet, at the same time, saving a precious file
252 breaks any hard links between it and other files.
254 This feature is advisory: for example, if the directory in which the
255 file is being saved is not writable, Emacs may ignore a non-nil value
256 of `file-precious-flag' and write directly into the file.
258 See also: `break-hardlink-on-save'."
263 "Whether to allow breaking hardlinks when saving files.
264 If non-nil, then when saving a file that exists under several
265 names \(i.e., has multiple hardlinks), break the hardlink
266 associated with `buffer-file-name' and write to a new file, so
267 that the other instances of the file are not affected by the
268 save.
270 If `buffer-file-name' refers to a symlink, do not break the symlink.
272 Unlike `file-precious-flag', `break-hardlink-on-save' is not advisory.
273 For example, if the directory in which a file is being saved is not
274 itself writable, then error instead of saving in some
275 hardlink-nonbreaking way.
277 See also `backup-by-copying' and `backup-by-copying-when-linked'."
283 "Control use of version numbers for backup files.
284 When t, make numeric backup versions unconditionally.
285 When nil, make them for files that have some already.
286 The value `never' means do not make them."
293 "Return whether X is safe as local value for `version-control'."
300 "When cleaning directory, number of versions to keep."
306 "If t, delete excess backup versions silently.
307 If nil, ask confirmation. Any other value prevents any trimming."
314 "Number of oldest versions to keep when a new numbered backup is made."
320 "Number of newest versions to keep when a new numbered backup is made.
321 Includes the new backup. Must be > 0"
327 "Whether to add a newline automatically at the end of the file.
329 A value of t means do this only when the file is about to be saved.
330 A value of `visit' means do this right after the file is visited.
331 A value of `visit-save' means do it at both of those times.
332 Any other non-nil value means ask user whether to add a newline, when saving.
333 A value of nil means don't add newlines.
335 Certain major modes set this locally to the value obtained
336 from `mode-require-final-newline'."
346 "Whether to add a newline at end of file, in certain major modes.
347 Those modes set `require-final-newline' to this value when you enable them.
348 They do so because they are often used for files that are supposed
349 to end in newlines, and the question is how to arrange that.
351 A value of t means do this only when the file is about to be saved.
352 A value of `visit' means do this right after the file is visited.
353 A value of `visit-save' means do it at both of those times.
354 Any other non-nil value means ask user whether to add a newline, when saving.
356 A value of nil means do not add newlines. That is a risky choice in this
357 variable since this value is used for modes for files that ought to have
358 final newlines. So if you set this to nil, you must explicitly check and
359 add a final newline, whenever you save a file that really needs one."
369 "Non-nil says by default do auto-saving of every file-visiting buffer."
375 ;; Don't put "\\2" inside expand-file-name, since it will be
376 ;; transformed to "/2" on DOS/Windows.
378 "Transforms to apply to buffer file name before making auto-save file name.
379 Each transform is a list (REGEXP REPLACEMENT UNIQUIFY):
380 REGEXP is a regular expression to match against the file name.
381 If it matches, `replace-match' is used to replace the
382 matching part with REPLACEMENT.
383 If the optional element UNIQUIFY is non-nil, the auto-save file name is
384 constructed by taking the directory part of the replaced file-name,
385 concatenated with the buffer file name with all directory separators
386 changed to `!' to prevent clashes. This will not work
387 correctly if your filesystem truncates the resulting name.
389 All the transforms in the list are tried, in the order they are listed.
390 When one transform applies, its result is final;
391 no further transforms are tried.
393 The default value is set up to put the auto-save file into the
394 temporary directory (see the variable `temporary-file-directory') for
395 editing a remote file.
397 On MS-DOS filesystems without long names this variable is always
398 ignored."
408 "Interval in seconds for `auto-save-visited-mode'.
409 If `auto-save-visited-mode' is enabled, Emacs will save all
410 buffers visiting a file to the visited file after it has been
411 idle for `auto-save-visited-interval' seconds."
421 "Toggle automatic saving to file-visiting buffers on or off.
422 With a prefix argument ARG, enable regular saving of all buffers
423 visiting a file if ARG is positive, and disable it otherwise.
424 Unlike `auto-save-mode', this mode will auto-save buffer contents
425 to the visited files directly and will also run all save-related
426 hooks. See Info node `Saving' for details of the save process.
428 If called from Lisp, enable the mode if ARG is omitted or nil,
429 and toggle it if ARG is `toggle'."
431 :global t
436 auto-save-visited-interval :repeat
440 auto-save-visited-file-name)))))))
442 ;; The 'set' part is so we don't get a warning for using this variable
443 ;; above, while still catching code that _sets_ the variable to get
444 ;; the same effect as the new auto-save-visited-mode.
449 "Non-nil means save word abbrevs too when files are saved.
450 If `silently', don't ask the user before saving."
455 "Non-nil means allow `find-file' to visit directories.
456 To visit the directory, `find-file' runs `find-directory-functions'."
461 "List of functions to try in sequence to visit a directory.
462 Each function is called with the directory name as the sole argument
463 and should return either a buffer or nil."
467 ;; FIXME: also add a hook for `(thing-at-point 'filename)'
469 "List of functions to try in sequence to get a file name at point.
470 Each function should return either nil or a file name found at the
471 location of point in the current buffer."
475 ;;;It is not useful to make this a local variable.
476 ;;;(put 'find-file-not-found-hooks 'permanent-local t)
480 "List of functions to be called for `find-file' on nonexistent file.
481 These functions are called as soon as the error is detected.
482 Variable `buffer-file-name' is already set up.
485 ;;;It is not useful to make this a local variable.
486 ;;;(put 'find-file-hooks 'permanent-local t)
489 "List of functions to be called after a buffer is loaded from a file.
490 The buffer's local variables (if any) will have been processed before the
491 functions are called."
499 "List of functions to be called before saving a buffer to a file.
500 Only used by `save-buffer'.
501 If one of them returns non-nil, the file is considered already written
502 and the rest are not called.
503 These hooks are considered to pertain to the visited file.
504 So any buffer-local binding of this variable is discarded if you change
506 change the major mode.
508 This hook is not run if any of the functions in
509 `write-contents-functions' returns non-nil. Both hooks pertain
510 to how to save a buffer to file, for instance, choosing a suitable
511 coding system and setting mode bits. (See Info
512 node `(elisp)Saving Buffers'.) To perform various checks or
524 "List of functions to be called before writing out a buffer to a file.
526 Only used by `save-buffer'. If one of them returns non-nil, the
527 file is considered already written and the rest are not called
528 and neither are the functions in `write-file-functions'. This
529 hook can thus be used to create save behavior for buffers that
530 are not visiting a file at all.
532 This variable is meant to be used for hooks that pertain to the
533 buffer's contents, not to the particular visited file; thus,
534 `set-visited-file-name' does not clear this variable; but changing the
535 major mode does clear it.
537 For hooks that _do_ pertain to the particular visited file, use
538 `write-file-functions'. Both this variable and
539 `write-file-functions' relate to how a buffer is saved to file.
540 To perform various checks or updates before the buffer is saved,
545 "Control use of local variables in files you visit.
546 The value can be t, nil, :safe, :all, or something else.
548 A value of t means file local variables specifications are obeyed
549 if all the specified variable values are safe; if any values are
550 not safe, Emacs queries you, once, whether to set them all.
551 \(When you say yes to certain values, they are remembered as safe.)
553 :safe means set the safe variables, and ignore the rest.
554 :all means set all variables, whether safe or not.
555 (Don't set it permanently to :all.)
556 A value of nil means always ignore the file local variables.
558 Any other value means always query you once whether to set them all.
559 \(When you say yes to certain values, they are remembered as safe, but
562 This variable also controls use of major modes specified in
563 a -*- line.
566 always obeys file local variable specifications and the -*- line,
567 and ignores this variable."
568 :risky t
577 "Non-nil means enable use of directory-local variables.
578 Some modes may wish to set this to nil to prevent directory-local
581 ;; This is an odd variable IMO.
582 ;; You might wonder why it is needed, when we could just do:
583 ;; (set (make-local-variable 'enable-local-variables) nil)
584 ;; These two are not precisely the same.
585 ;; Setting this variable does not cause -*- mode settings to be
586 ;; ignored, whereas setting enable-local-variables does.
587 ;; Only three places in Emacs use this variable: tar and arc modes,
588 ;; and rmail. The first two don't need it. They already use
589 ;; inhibit-local-variables-regexps, which is probably enough, and
590 ;; could also just set enable-local-variables locally to nil.
591 ;; Them setting it has the side-effect that dir-locals cannot apply to
592 ;; eg tar files (?). FIXME Is this appropriate?
593 ;; AFAICS, rmail is the only thing that needs this, and the only
594 ;; reason it uses it is for BABYL files (which are obsolete).
595 ;; These contain "-*- rmail -*-" in the first line, which rmail wants
596 ;; to respect, so that find-file on a BABYL file will switch to
597 ;; rmail-mode automatically (this is nice, but hardly essential,
598 ;; since most people are used to explicitly running a command to
599 ;; access their mail; M-x gnus etc). Rmail files may happen to
600 ;; contain Local Variables sections in messages, which Rmail wants to
601 ;; ignore. So AFAICS the only reason this variable exists is for a
602 ;; minor convenience feature for handling of an obsolete Rmail file format.
604 "Like `enable-local-variables', except for major mode in a -*- line.
605 The meaningful values are nil and non-nil. The default is non-nil.
606 It should be set in a buffer-local fashion.
608 Setting this to nil has the same effect as setting `enable-local-variables'
609 to nil, except that it does not ignore any mode: setting in a -*- line.
610 Unless this difference matters to you, you should set `enable-local-variables'
615 The value can be t, nil or something else.
616 A value of t means obey `eval' variables.
617 A value of nil means ignore them; anything else means query."
618 :risky t
625 "Non-nil means buffers visiting files read-only do so in view mode.
626 In fact, this means that all read-only buffers normally have
627 View mode enabled, including buffers that are read-only because
628 you visit a file you cannot alter, and buffers you make read-only
634 "History list of file names entered in the minibuffer.
636 Maximum length of the history list is determined by the value
640 "If non-nil, avoid messages when saving files.
641 Error-related messages will still be printed, but all other
644 \f
647 "Provides support for ange-ftp host name completion.
648 Runs the usual ange-ftp hook, but only for completion operations."
649 ;; Having this here avoids the need to load ange-ftp when it's not
650 ;; really in use.
656 inhibit-file-name-handlers)))
664 "Convert a standard file's name to something suitable for the OS.
665 This means to guarantee valid names and perhaps to canonicalize
666 certain patterns.
668 FILENAME should be an absolute file name since the conversion rules
669 sometimes vary depending on the position in the file name. E.g. c:/foo
670 is a valid DOS file name, but c:/bar/c:/foo is not.
672 This function's standard definition is trivial; it just returns
673 the argument. However, on Windows and DOS, replace invalid
674 characters. On DOS, make sure to obey the 8.3 limitations.
675 In the native Windows build, turn Cygwin names into native names.
677 See Info node `(elisp)Standard File Names' for more details."
682 ;; Replace invalid filename characters with !
686 name))
694 "Read directory name, prompting with PROMPT and completing in directory DIR.
695 Value is not expanded---you must call `expand-file-name' yourself.
696 Default name to DEFAULT-DIRNAME if user exits with the same
697 non-empty string that was inserted by this function.
698 (If DEFAULT-DIRNAME is omitted, DIR combined with INITIAL is used,
699 or just DIR if INITIAL is nil.)
700 If the user exits with an empty minibuffer, this function returns
701 an empty string. (This can only happen if the user erased the
702 pre-inserted contents or if `insert-default-directory' is nil.)
703 Fourth arg MUSTMATCH non-nil means require existing directory's name.
704 Non-nil and non-t means also require confirmation after completion.
705 Fifth arg INITIAL specifies text to start with.
706 DIR should be an absolute directory name. It defaults to
707 the value of `default-directory'."
712 dir))
713 mustmatch initial
716 \f
718 "Show the current default directory.
719 With prefix argument INSERT, insert the current default directory
720 at point instead."
727 "Value of the CDPATH environment variable, as a list.
731 "Explode a search path into a list of directory names.
732 Directories are separated by `path-separator' (which is colon in
733 GNU and Unix systems). Substitute environment variables into the
734 resulting list of directory names. For an empty path element (i.e.,
735 a leading or trailing separator, or two adjacent separators), return
736 nil (meaning `default-directory') as the associated list element."
744 "Change current directory to given absolute file name DIR."
745 ;; Put the name into directory syntax now,
746 ;; because otherwise expand-file-name may give some bad results.
748 ;; We used to additionally call abbreviate-file-name here, for an
749 ;; unknown reason. Problem is that most buffers are setup
750 ;; without going through cd-absolute and don't call
751 ;; abbreviate-file-name on their default-directory, so the few that
752 ;; do end up using a superficially different directory.
764 "Make DIR become the current buffer's default directory.
765 If your environment includes a `CDPATH' variable, try each one of
766 that list of directories (separated by occurrences of
767 `path-separator') when resolving a relative directory name.
768 The path separator is colon in GNU and GNU-like systems."
771 ;; FIXME: There's a subtle bug in the completion below. Seems linked
772 ;; to a fundamental difficulty of implementing `predicate' correctly.
773 ;; The manifestation is that TAB may list non-directories in the case where
774 ;; those files also correspond to valid directories (if your cd-path is (A/
775 ;; B/) and you have A/a a file and B/a a directory, then both `a' and `a/'
776 ;; will be listed as valid completions).
777 ;; This is because `a' (listed because of A/a) is indeed a valid choice
778 ;; (which will lead to the use of B/a).
783 cd-path nil))
792 default-directory default-directory
793 t))))
803 "Return list of all files under DIR that have file names matching REGEXP.
805 order, and files from each directory are sorted in alphabetical order.
806 Each file name appears in the returned list in its absolute form.
807 Optional argument INCLUDE-DIRECTORIES non-nil means also include in the
808 output directories whose names match REGEXP."
811 ;; When DIR is "/", remote file names like "/method:" could
812 ;; also be offered. We shall suppress them.
820 ;; Don't follow symlinks to other directories.
824 full-file regexp include-directories))))
835 "Load the Lisp file named FILE."
836 ;; This is a case where .elc and .so/.dll make a lot of sense.
840 completion-ignored-extensions))))
845 "Search for FILENAME through PATH.
846 If found, return the absolute file name of FILENAME; otherwise
847 return nil.
848 PATH should be a list of directories to look in, like the lists in
849 `exec-path' or `load-path'.
850 If SUFFIXES is non-nil, it should be a list of suffixes to append to
853 If non-nil, PREDICATE is used instead of `file-readable-p'.
855 This function will normally skip directories, so if you want it to find
856 directories, make sure the PREDICATE function returns `dir-ok' for them.
858 PREDICATE can also be an integer to pass to the `access' system call,
859 in which case file-name handlers are ignored. This usage is deprecated.
860 For compatibility, PREDICATE can also be one of the symbols
861 `executable', `readable', `writable', or `exists', or a list of
862 one or more of those symbols."
873 "Do completion for file names passed to `locate-file'."
876 ;; FIXME: maybe we should use completion-file-name-table instead,
877 ;; tho at least for `load', the arg is passed through
878 ;; substitute-in-file-name for historical reasons.
888 ;; If we have files like "foo.el" and "foo.elc", we could load one of
889 ;; them with "foo.el", "foo.elc", or "foo", where just "foo" is the
890 ;; preferred way. So if we list all 3, that gives a lot of redundant
891 ;; entries for the poor soul looking just for "foo". OTOH, sometimes
892 ;; the user does want to pay attention to the extension. We try to
893 ;; diffuse this tension by stripping the suffix, except when the
894 ;; result is a single element (i.e. usually we only list "foo" unless
895 ;; it's the only remaining element in the list, in which case we do
896 ;; list "foo", "foo.elc" and "foo.el").
907 string-file dir))
912 ;; Switching from names to names+fullnames creates a non-monotonicity
913 ;; which can cause problems with things like partial-completion.
914 ;; To minimize the problem, filter out completion-regexp-list, so that
915 ;; M-x load-library RET t/x.e TAB finds some files. Also remove elements
916 ;; from `names' which only matched `string' when they still had
917 ;; their suffix.
919 ;; Remove duplicates of the first element, so that we can easily check
920 ;; if `names' really only contains a single element.
923 ;; There's no more than one matching non-suffixed element, so expand
924 ;; the list by adding the suffixed elements as well.
927 string-dir names string-file pred action)))))
930 "Do completion for file names passed to `locate-file'.
931 PATH-AND-SUFFIXES is a pair of lists, (DIRECTORIES . SUFFIXES)."
935 string nil action))
939 "Regexp of directory names which stop the search in `locate-dominating-file'.
940 Any directory whose name matches this regexp will be treated like
941 a kind of root directory by `locate-dominating-file' which will stop its search
942 when it bumps into it.
943 The default regexp prevents fruitless and time-consuming attempts to find
944 special files in directories in which filenames are interpreted as hostnames,
948 "Starting at FILE, look up directory hierarchy for directory containing NAME.
949 FILE can be a file or a directory. If it's a file, its directory will
950 serve as the starting point for searching the hierarchy of directories.
951 Stop at the first parent directory containing a file NAME,
952 and return the directory. Return nil if not found.
953 Instead of a string, NAME can also be a predicate taking one argument
954 \(a directory) and returning a non-nil value if that directory is the one for
955 which we're looking. The predicate will be called with every file/directory
956 the function needs to examine, starting with FILE."
957 ;; Represent /home/luser/foo as ~/foo so that we don't try to look for
958 ;; `name' in /home or in /.
961 try)
975 "Non-nil means warn if cannot access `user-emacs-directory'.
976 Set this to nil at your own risk..."
982 "Return an absolute per-user Emacs-specific file name.
983 If NEW-NAME exists in `user-emacs-directory', return it.
984 Else if OLD-NAME is non-nil and ~/OLD-NAME exists, return ~/OLD-NAME.
985 Else return NEW-NAME in `user-emacs-directory', creating the
986 directory if it does not exist."
994 at-home
995 ;; Make sure `user-emacs-directory' exists,
996 ;; unless we're in batch mode or dumping Emacs.
998 purify-flag
1008 user-emacs-directory-warning
1010 ;; Only warn once per Emacs session.
1014 Unable to %s `user-emacs-directory' (%s).
1015 Any data that would normally be written there may be lost!
1016 If you never want to see this message again,
1017 customize the variable `user-emacs-directory-warning'."
1018 errtype user-emacs-directory)))))
1019 bestname))))
1023 "Search for COMMAND in `exec-path' and return the absolute file name.
1024 Return nil if COMMAND is not found anywhere in `exec-path'."
1025 ;; Use 1 rather than file-executable-p to better match the behavior of
1026 ;; call-process.
1030 "Load the Emacs Lisp library named LIBRARY.
1031 LIBRARY should be a string.
1032 This is an interface to the function `load'. LIBRARY is searched
1033 for in `load-path', both with and without `load-suffixes' (as
1034 well as `load-file-rep-suffixes').
1036 See Info node `(emacs)Lisp Libraries' for more details.
1037 See `load-file' for a different interface to `load'."
1042 load-path
1047 "Test whether FILE specifies a location on a remote system.
1048 A file is considered remote if accessing it is likely to
1049 be slower or less reliable than accessing local files.
1051 `file-remote-p' never opens a new remote connection. It can
1052 only reuse a connection that is already open.
1054 Return nil or a string identifying the remote connection
1055 \(ideally a prefix of FILE). Return nil if FILE is a relative
1056 file name.
1058 When IDENTIFICATION is nil, the returned string is a complete
1059 remote identifier: with components method, user, and host. The
1060 components are those present in FILE, with defaults filled in for
1061 any that are missing.
1063 IDENTIFICATION can specify which part of the identification to
1064 return. IDENTIFICATION can be the symbol `method', `user',
1065 `host', or `localname'. Any other value is handled like nil and
1066 means to return the complete identification. The string returned
1067 for IDENTIFICATION `localname' can differ depending on whether
1068 there is an existing connection.
1070 If CONNECTED is non-nil, return an identification only if FILE is
1071 located on a remote system and a connection is established to
1072 that remote system.
1074 Tip: You can use this expansion of remote identifier components
1075 to derive a new remote file name from an existing one. For
1081 same remote identifier as FILE but expanded; a name such as
1086 nil)))
1088 ;; Probably this entire variable should be obsolete now, in favor of
1089 ;; something Tramp-related (?). It is not used in many places.
1090 ;; It's not clear what the best file for this to be in is, but given
1091 ;; it uses custom-initialize-delay, it is easier if it is preloaded
1092 ;; rather than autoloaded.
1094 ;; This used to try various hard-coded places for remsh, rsh, and
1095 ;; rcmd, trying to guess based on location whether "rsh" was
1096 ;; "restricted shell" or "remote shell", but I don't see the point
1097 ;; in this day and age. Almost everyone will use ssh, and have
1098 ;; whatever command they want to use in PATH.
1105 "Program to use to execute commands on a remote host (e.g. ssh or rsh)."
1112 "Whether to use the remote file-name cache for read access.
1113 When nil, never expire cached values (caution)
1114 When t, never use the cache (safe, but may be slow)
1115 A number means use cached values for that amount of seconds since caching.
1117 The attributes of remote files are cached for better performance.
1118 If they are changed outside of Emacs's control, the cached values
1119 become invalid, and must be reread. If you are sure that nothing
1120 other than Emacs changes the files, you can set this variable to nil.
1122 If a remote file is checked regularly, it might be a good idea to
1123 let-bind this variable to a value less than the interval between
1124 consecutive checks. For example:
1126 (defun display-time-file-nonempty-p (file)
1127 (let ((remote-file-name-inhibit-cache (- display-time-interval 5)))
1128 (and (file-exists-p file)
1129 (< 0 (nth 7 (file-attributes (file-chase-links file)))))))"
1140 "Return the local name component of FILE.
1141 It returns a file name which can be used directly as argument of
1142 `process-file', `start-file-process', or `shell-command'."
1146 "Copy the file FILE into a temporary file on this machine.
1147 Returns the name of the local copy, or nil, if FILE is directly
1148 accessible."
1149 ;; This formerly had an optional BUFFER argument that wasn't used by
1150 ;; anything.
1154 nil)))
1157 "Return non-nil if FILE is an absolute name to the operating system.
1158 This is like `file-name-absolute-p', except that it returns nil for
1159 names beginning with `~'."
1164 "Splice DIRNAME to FILE like the operating system would.
1165 If FILE is relative, return DIRNAME concatenated to FILE.
1166 Otherwise return FILE, quoted as needed if DIRNAME and FILE have
1167 different handlers; although this quoting is dubious if DIRNAME
1168 is magic, it is not clear what would be better. This function
1169 differs from `expand-file-name' in that DIRNAME must be a
1170 directory name and leading `~' and `/:' are not special in FILE."
1172 file
1176 unquoted
1180 "Return the truename of FILENAME.
1181 If FILENAME is not absolute, first expands it against `default-directory'.
1182 The truename of a file name is found by chasing symbolic links
1183 both at the level of the file and at the level of the directories
1184 containing it, until no links are left at any level.
1187 ;; COUNTER and PREV-DIRS are only used in recursive calls.
1188 ;; COUNTER can be a cons cell whose car is the count of how many
1189 ;; more links to chase before getting an error.
1190 ;; PREV-DIRS can be a cons cell whose car is an alist
1191 ;; of truenames we've just recently computed.
1205 ;; For speed, remove the ange-ftp completion handler from the list.
1206 ;; We know it's not needed here.
1207 ;; For even more speed, do this only on the outermost call.
1214 ;; andrewi@harlequin.co.uk - on Windows, there is an issue with
1215 ;; case differences being ignored by the OS, and short "8.3 DOS"
1216 ;; name aliases existing for all files. (The short names are not
1217 ;; reported by directory-files, but can be used to refer to files.)
1218 ;; It seems appropriate for file-truename to resolve these issues in
1219 ;; the most natural way, which on Windows is to call the function
1220 ;; `w32-long-file-name' - this returns the exact name of a file as
1221 ;; it is stored on disk (expanding short name aliases with the full
1222 ;; name in the process).
1225 ;; If filename exists, use its long name. If it doesn't
1226 ;; exist, the recursion below on the directory of filename
1227 ;; will drill down until we find a directory that exists,
1228 ;; and use the long name of that, with the extra
1229 ;; non-existent path components concatenated.
1234 ;; If this file directly leads to a link, process that iteratively
1235 ;; so that we don't use lots of stack.
1241 ;; For file name that has a special handler, call handler.
1242 ;; This is so that ange-ftp can save time by doing a no-op.
1245 done t)
1247 target dirfile)
1248 ;; Get the truename of the directory.
1250 ;; If these are equal, we have the (or a) root directory.
1254 ;; If this is the same dir we last got the truename for,
1255 ;; save time--don't recalculate.
1265 done t)
1268 done t)
1269 ;; Put it back on the file name.
1271 ;; Is the file name the name of a link?
1274 ;; Yes => chase that link, then start all over
1275 ;; since the link may point to a directory name that uses links.
1276 ;; We can't safely use expand-file-name here
1277 ;; since target might look like foo/../bar where foo
1278 ;; is itself a link. Instead, we handle . and .. above.
1280 done nil)
1281 ;; No, we are done!
1283 filename))
1286 "Chase links in FILENAME until a name that is not a link.
1287 Unlike `file-truename', this does not check whether a parent
1288 directory name is a symbolic link.
1289 If the optional argument LIMIT is a number,
1290 it means chase no more than that many links and then stop."
1298 ;; In the context of a link, `//' doesn't mean what Emacs thinks.
1301 ;; Handle `..' by hand, since it needs to work in the
1302 ;; target of any directory symlink.
1303 ;; This code is not quite complete; it does not handle
1304 ;; embedded .. in some cases such as ./../foo and foo/bar/../../../lose.
1308 ;; Chase links in the default dir of the symlink.
1312 ;; Now find the parent of that dir.
1315 tem))
1317 newname))
1319 ;; A handy function to display file sizes in human-readable form.
1320 ;; See http://en.wikipedia.org/wiki/Kibibyte for the reference.
1322 "Produce a string showing FILE-SIZE in human-readable form.
1324 Optional second argument FLAVOR controls the units and the display format:
1326 If FLAVOR is nil or omitted, each kilobyte is 1024 bytes and the produced
1328 If FLAVOR is `si', each kilobyte is 1000 bytes and the produced suffixes
1330 If FLAVOR is `iec', each kilobyte is 1024 bytes and the produced suffixes
1333 1024.0
1336 ;; none, kilo, mega, giga, tera, peta, exa, zetta, yotta
1342 "%.1f%s%s"
1344 file-size
1346 "K"
1352 "^//[^/]+/"
1353 ;; regexp-opt.el is not dumped into emacs binary.
1354 ;;(concat
1355 ;; "^" (regexp-opt '("/afs/" "/media/" "/mnt" "/net/" "/tmp_mnt/"))))
1357 "File systems which ought to be mounted."
1364 "The directory for writing temporary files.
1365 In case of a remote `default-directory', this is a directory for
1366 temporary files on that remote host. If such a directory does
1367 not exist, or `default-directory' ought to be located on a
1368 mounted file system (see `mounted-file-systems'), the function
1369 returns `default-directory'.
1370 For a non-remote and non-mounted `default-directory', the value of
1371 the variable `temporary-file-directory' is returned."
1377 default-directory
1378 temporary-file-directory))))
1381 "Create a temporary file.
1382 The returned file name (created by appending some random characters at the end
1383 of PREFIX, and expanding against `temporary-file-directory' if necessary),
1384 is guaranteed to point to a newly created file.
1385 You can then use `write-region' to write new data into the file.
1387 If DIR-FLAG is non-nil, create a new empty directory instead of a file.
1389 If SUFFIX is non-nil, add that at the end of the file name.
1391 If TEXT is a string, insert it into the new file; DIR-FLAG should be nil.
1392 Otherwise the file will be empty."
1404 "Implement (make-temp-file ABSOLUTE-PREFIX DIR-FLAG SUFFIX TEXT).
1405 This implementation works on magic file names."
1406 ;; Create temp files with strict access rights. It's easy to
1407 ;; loosen them later, whereas it's impossible to close the
1408 ;; time-window of loose permissions otherwise.
1411 file)
1420 nil)
1422 ;; the file was somehow created by someone else between
1423 ;; `make-temp-name' and `write-region', let's try again.
1424 nil)
1425 file)))
1428 "Create a temporary file as close as possible to `default-directory'.
1429 If PREFIX is a relative file name, and `default-directory' is a
1430 remote file name or located on a mounted file systems, the
1431 temporary file is created in the directory returned by the
1432 function `temporary-file-directory'. Otherwise, the function
1433 `make-temp-file' is used. PREFIX, DIR-FLAG and SUFFIX have the
1434 same meaning as in `make-temp-file'."
1443 "Change the encoding of FILE's name from CODING to NEW-CODING.
1444 The value is a new name of FILE.
1445 Signals a `file-already-exists' error if a file of the new name
1446 already exists unless optional fourth argument OK-IF-ALREADY-EXISTS
1447 is non-nil. A number as fourth arg means request confirmation if
1448 the new name already exists. This is what happens in interactive
1449 use with M-x."
1452 default-file-name-coding-system))
1454 from-coding to-coding)
1456 ;; We provide the default coding only when it seems that
1457 ;; the filename is correctly decoded by the default
1458 ;; coding.
1464 filename default-coding)
1465 default-coding))
1469 ;; We provide the default coding only when a user is going to
1470 ;; change the encoding not from the default coding.
1474 filename from-coding)))
1477 filename from-coding default-coding)
1478 default-coding)))
1482 default-file-name-coding-system))
1483 ;; FILE should have been decoded by DEFAULT-CODING.
1487 ;; Suppress further encoding.
1492 newname))
1493 \f
1495 "Whether confirmation is requested before visiting a new file or buffer.
1496 If nil, confirmation is not requested.
1497 If the value is `after-completion', confirmation is only
1498 requested if the user called `minibuffer-complete' right before
1499 `minibuffer-complete-and-exit'.
1500 Any other non-nil value means to request confirmation.
1502 This affects commands like `switch-to-buffer' and `find-file'."
1510 "Whether to request confirmation before visiting a new file or buffer.
1511 The variable `confirm-nonexistent-file-or-buffer' determines the
1512 return value, which may be passed as the REQUIRE-MATCH arg to
1513 `read-buffer' or `find-file-read-args'."
1521 "Temporarily add FUN to `minibuffer-setup-hook' while executing BODY.
1523 By default, FUN is prepended to `minibuffer-setup-hook'. But if FUN is of
1524 the form `(:append FUN1)', FUN1 will be appended to `minibuffer-setup-hook'
1525 instead of prepending it.
1527 BODY should use the minibuffer at most once.
1528 Recursive uses of the minibuffer are unaffected (FUN is not
1529 called additional times).
1531 This macro actually adds an auxiliary function that calls FUN,
1532 rather than FUN itself, to `minibuffer-setup-hook'."
1543 ;; Clear out this hook so it does not interfere
1544 ;; with any recursive minibuffer usage.
1555 t))
1558 "Edit file FILENAME.
1559 Switch to a buffer visiting file FILENAME,
1560 creating one if none already exists.
1561 Interactively, the default if you just type RET is the current directory,
1562 but the visited file name is available through the minibuffer history:
1563 type M-n to pull it into the minibuffer.
1565 You can visit files on remote machines by specifying something
1566 like /ssh:SOME_REMOTE_MACHINE:FILE for the file name. You can
1567 also visit local files as a different user by specifying
1568 /sudo::FILE for the file name.
1569 See the Info node `(tramp)File name Syntax' in the Tramp Info
1570 manual, for more about this.
1572 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1573 expand wildcards (if any) and visit multiple files. You can
1574 suppress wildcard expansion by setting `find-file-wildcards' to nil.
1576 To visit a file without any kind of conversion and without
1587 "Edit file FILENAME, in another window.
1590 an existing one. See the function `display-buffer'.
1592 Interactively, the default if you just type RET is the current directory,
1593 but the visited file name is available through the minibuffer history:
1594 type M-n to pull it into the minibuffer.
1596 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1597 expand wildcards (if any) and visit multiple files."
1607 value)
1611 "Edit file FILENAME, in another frame.
1614 an existing one. See the function `display-buffer'.
1616 Interactively, the default if you just type RET is the current directory,
1617 but the visited file name is available through the minibuffer history:
1618 type M-n to pull it into the minibuffer.
1620 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1621 expand wildcards (if any) and visit multiple files."
1631 value)
1635 "Edit the existing file FILENAME.
1637 file names with wildcards."
1654 value))
1657 "Edit file FILENAME but don't allow changes.
1666 "Edit file FILENAME in another window but don't allow changes.
1675 "Edit file FILENAME in another frame but don't allow changes.
1684 "Find file FILENAME as a replacement for the file in the next window.
1685 This command does not select that window.
1689 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1690 expand wildcards (if any) and replace the file with multiple files."
1701 "Find alternate file: " file-dir nil
1703 t))))
1710 ;; Defined and used in buffer.c, but not as a DEFVAR_LISP.
1712 "Hook run when a buffer is killed.
1713 The buffer being killed is current while the hook is running.
1714 See `kill-buffer'.
1716 Note: Be careful with let-binding this hook considering it is
1720 "Find file FILENAME, select its buffer, kill previous buffer.
1721 If the current buffer now contains an empty file that you just visited
1722 \(presumably by mistake), use this command to visit the file you really want.
1726 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1727 expand wildcards (if any) and replace the file with multiple files.
1729 If the current buffer is an indirect buffer, or the base buffer
1730 for one or more indirect buffers, the other buffer(s) are not
1731 killed."
1740 "Find alternate file: " file-dir nil
1742 t)))
1756 ;; Run `kill-buffer-hook' here. It needs to happen before
1757 ;; variables like `buffer-file-name' etc are set to nil below,
1758 ;; because some of the hooks that could be invoked
1759 ;; (e.g., `save-place-to-alist') depend on those variables.
1760 ;;
1761 ;; Note that `kill-buffer-hook' is not what queries whether to
1762 ;; save a modified buffer visiting a file. Rather, `kill-buffer'
1763 ;; asks that itself. Thus, there's no need to temporarily do
1764 ;; `(set-buffer-modified-p nil)' before running this hook.
1766 ;; Okay, now we can end-of-life the old buffer.
1773 ;; This prevents us from finding the same buffer
1774 ;; if we specified the same file again.
1778 ;; Likewise for dired buffers.
1782 ;; This executes if find-file gets an error
1783 ;; and does not really find anything.
1784 ;; We put things back as they were.
1785 ;; If find-file actually finds something, we kill obuf below.
1794 ;; We already ran these; don't run them again.
1797 \f
1798 ;; FIXME we really need to fold the uniquify stuff in here by default,
1799 ;; not using advice, and add it to the doc string.
1801 "Create a suitably named buffer for visiting FILENAME, and return it.
1802 FILENAME (sans directory) is used unchanged if that name is free;
1803 otherwise a string <2> or <3> or ... is appended to get an unused name.
1805 Emacs treats buffers whose names begin with a space as internal buffers.
1806 To avoid confusion when visiting a file whose name begins with a space,
1813 lastname))))
1816 "Create and return a buffer with a name based on NAME.
1817 Choose the buffer's name using `generate-new-buffer-name'."
1821 "Regexp to match the automounter prefix in a directory name."
1827 "Regexp matching the user's homedir at the beginning of file name.
1831 "Return a version of FILENAME shortened using `directory-abbrev-alist'.
1833 home directory is a root directory) and removes automounter prefixes
1834 \(see the variable `automount-dir-prefix')."
1835 ;; Get rid of the prefixes added by the automounter.
1842 ;; Avoid treating /home/foo as /home/Foo during `~' substitution.
1844 ;; If any elt of directory-abbrev-alist matches this name,
1845 ;; abbreviate accordingly.
1851 ;; Compute and save the abbreviated homedir name.
1852 ;; We defer computing this until the first time it's needed, to
1853 ;; give time for directory-abbrev-alist to be set properly.
1854 ;; We include a slash at the end, to avoid spurious matches
1855 ;; such as `/usr/foobar' when the home dir is `/usr/foo'.
1863 ;; Depending on whether default-directory does or
1864 ;; doesn't include non-ASCII characters, the value
1865 ;; of abbreviated-home-dir could be multibyte or
1866 ;; unibyte. In the latter case, we need to decode
1867 ;; it. Note that this function is called for the
1868 ;; first time (from startup.el) when
1869 ;; locale-coding-system is already set up.
1871 abbreviated-home-dir
1874 'utf-8
1875 locale-coding-system))))))
1877 ;; If FILENAME starts with the abbreviated homedir,
1878 ;; make it start with `~' instead.
1880 ;; If the home dir is just /, don't change it.
1883 ;; MS-DOS root directories can come with a drive letter;
1884 ;; Novell Netware allows drive letters beyond `Z:'.
1892 filename)))
1895 "Return the buffer visiting file FILENAME (a string).
1896 This is like `get-file-buffer', except that it checks for any buffer
1897 visiting the same file, possibly under a different name.
1898 If PREDICATE is non-nil, only buffers satisfying it are eligible,
1899 and others are ignored.
1900 If there is no such live buffer, return nil."
1913 found)
1923 ;; Verify this buffer's file number
1924 ;; still belongs to its file.
1927 attributes)
1931 found))))
1932 \f
1934 "Non-nil means file-visiting commands should handle wildcards.
1935 For example, if you specify `*.c', that would visit all the files
1936 whose names match the pattern."
1942 "Non-nil means suppress warning messages for symlinked files.
1943 When nil, Emacs prints a warning when visiting a file that is already
1944 visited, but with a different name. Setting this option to t
1945 suppresses this warning."
1951 "Maximum size of file above which a confirmation is requested.
1952 When nil, never request confirmation."
1959 "Warn if file size exceeds this percentage of available free memory.
1960 When nil, never issue warning. Beware: This probably doesn't do what you
1968 "If file SIZE larger than `large-file-warning-threshold', allow user to abort.
1969 OP-TYPE specifies the file operation being performed (for message to user)."
1978 "Warn if an attempt to open file of SIZE bytes may run out of memory."
1988 "You are trying to open a file whose size (%s)
1989 exceeds the %S%% of currently available free memory (%s).
1990 If that fails, try to open it with `find-file-literally'
1991 \(but note that some characters might be displayed incorrectly)."
1993 out-of-memory-warning-percentage
1997 "Like `message', except sometimes don't print to minibuffer.
1998 If the variable `save-silently' is non-nil, the message is not
1999 displayed on the minibuffer."
2004 "Read file FILENAME into a buffer and return the buffer.
2005 If a buffer exists visiting FILENAME, return that one, but
2006 verify that the file has not changed since visited or saved.
2007 The buffer is not selected, just returned to the caller.
2008 Optional second arg NOWARN non-nil means suppress any warning messages.
2009 Optional third arg RAWFILE non-nil means the file is read literally.
2010 Optional fourth arg WILDCARDS non-nil means do wildcard processing
2011 and visit all the matching files. When wildcards are actually
2012 used and expanded, return a list of buffers that are visiting
2013 the various files."
2020 'find-directory-functions
2023 filename)))
2026 find-file-wildcards
2040 ;; Find any buffer for a file which has same truename.
2042 ;; Let user know if there is a buffer with the same truename.
2046 find-file-suppress-same-file-warnings
2050 ;; Optionally also find that buffer.
2053 ;; Check to see if the file looks uncommonly large.
2058 ;; We are using an existing buffer.
2065 ;; Certain files should be reverted automatically
2066 ;; if they have changed on disk and not in the buffer.
2074 found))
2084 "File %s changed on disk. Discard your edits? "
2089 "File %s changed on disk. Discard your edits in %s? "
2097 ;; Check if a formerly read-only file has become
2098 ;; writable and vice versa, but if the buffer agrees
2099 ;; with the new state of the file, that is ok too.
2109 buffer-file-name
2110 new-status new-status)))
2116 nonexistent
2117 ;; It is confusing to ask whether to visit
2118 ;; non-literally if they have the file in
2119 ;; hexl-mode or image-mode.
2125 "The file %s is already visited normally,
2126 and you have edited the buffer. Now you have asked to visit it literally,
2127 meaning no coding system handling, format conversion, or local variables.
2128 Emacs can only visit a file in one way at a time.
2130 Do you want to save the file, and visit it literally instead? "
2131 "The file %s is already visited literally,
2132 meaning no coding system handling, format conversion, or local variables.
2133 You have edited the buffer. Now you have asked to visit the file normally,
2134 but Emacs can only visit a file in one way at a time.
2141 rawfile truename number))
2145 "\
2146 Do you want to discard your changes, and visit the file literally now? "
2147 "\
2150 rawfile truename number)
2156 "The file %s is already visited normally.
2157 You have asked to visit it literally,
2158 meaning no coding system decoding, format conversion, or local variables.
2159 But Emacs can only visit a file in one way at a time.
2161 Do you want to revisit the file literally now? "
2162 "The file %s is already visited literally,
2163 meaning no coding system decoding, format conversion, or local variables.
2164 You have asked to visit it normally,
2165 but Emacs can only visit a file in one way at a time.
2170 rawfile truename number)
2173 ;; Return the buffer we are using.
2174 buf)
2175 ;; Create a new buffer.
2177 ;; find-file-noselect-1 may use a different buffer.
2179 rawfile truename number))))))
2185 ;; Needed in case we are re-visiting the file with a different
2186 ;; text representation.
2203 filename)))
2204 ;; Unconditionally set error
2214 filename)))
2215 ;; Run find-file-not-found-functions until one returns non-nil.
2217 ;; If they fail too, set error.
2219 ;; Record the file's truename, and maybe use that as visited name.
2227 ;; Set buffer's default directory to that of the file.
2229 ;; Turn off backup files for certain file names. Since
2230 ;; this is a permanent local, the major mode won't eliminate it.
2244 \f
2246 "Like `insert-file-contents', but only reads in the file literally.
2247 See `insert-file-contents' for an explanation of the parameters.
2248 A buffer may be modified in several ways after reading into the buffer,
2249 due to Emacs features such as format decoding, character code
2250 conversion, `find-file-hook', automatic uncompression, etc.
2252 This function ensures that none of these modifications will take place."
2258 ;; FIXME: Yuck!! We should turn insert-file-contents-literally
2259 ;; into a file operation instead!
2261 inhibit-file-name-handlers))
2268 filename)))
2269 ;; Check whether the file is uncommonly large
2280 "Insert contents of file FILENAME into buffer after point with no conversion.
2282 This function is meant for the user to run interactively.
2283 Don't call it from programs! Use `insert-file-contents-literally' instead.
2284 \(Its calling sequence is different; see its documentation)."
2290 "Non-nil if this buffer was made by `find-file-literally' or equivalent.
2291 This has the `permanent-local' property, which takes effect if you
2296 "Visit file FILENAME with no conversion of any kind.
2297 Format conversion and character code conversion are both disabled,
2298 and multibyte characters are disabled in the resulting buffer.
2299 The major mode used is Fundamental mode regardless of the file name,
2300 and local variable specifications in the file are ignored.
2301 Automatic uncompression and adding a newline at the end of the
2302 file due to `require-final-newline' is also disabled.
2304 You cannot absolutely rely on this function to result in
2305 visiting the file literally. If Emacs already has a buffer
2306 which is visiting the file, you get the existing buffer,
2307 regardless of whether it was created literally or not.
2309 In a Lisp program, if you want to be sure of accessing a file's
2310 contents literally, you should create a temporary buffer and then read
2311 the file contents into it using `insert-file-contents-literally'."
2314 "Find file literally: " nil default-directory
2317 \f
2319 _after-find-file-from-revert-buffer
2320 nomodes)
2321 "Called after finding a file and by the default revert function.
2322 Sets buffer mode, parses local variables.
2323 Optional args ERROR, WARN, and NOAUTO: ERROR non-nil means there was an
2324 error in reading the file. WARN non-nil means warn if there
2325 exists an auto-save file more recent than the visited file.
2326 NOAUTO means don't mess with auto-save mode.
2327 Fourth arg AFTER-FIND-FILE-FROM-REVERT-BUFFER is ignored
2328 \(see `revert-buffer-in-progress-p' for similar functionality).
2329 Fifth arg NOMODES non-nil means don't alter the file's modes.
2330 Finishes by calling the functions in `find-file-hook'
2331 unless NOMODES is non-nil."
2334 nil
2344 "Symbolic link that points to nonexistent file"
2348 ;; No need to warn if buffer is auto-saved
2349 ;; under the name of the visited file.
2351 auto-save-visited-file-name))
2354 buffer-file-name))
2374 ;; Make people do a little extra work (C-x C-q)
2375 ;; before altering a backup file.
2378 ;; When a file is marked read-only,
2379 ;; make the buffer read-only even if root is looking at it.
2387 ;; If requested, add a newline at the end of the file.
2398 view-read-only
2406 "Choose the major mode for this buffer automatically.
2407 Also sets up any specified local variables of the file.
2408 Uses the visited file name, the -*- line, and the local variables spec.
2410 This function is called automatically from `find-file'. In that case,
2411 we may set up the file-specified mode and local variables,
2412 depending on the value of `enable-local-variables'.
2413 In addition, if `local-enable-local-variables' is nil, we do
2414 not set local variables (though we do notice a mode specified with -*-.)
2416 `enable-local-variables' is ignored if you run `normal-mode' interactively,
2417 or from Lisp without specifying the optional argument FIND-FILE;
2418 in that case, this function acts as if `enable-local-variables' were t."
2425 ;; FIXME this is less efficient than it could be, since both
2426 ;; s-a-m and h-l-v may parse the same regions, looking for "mode:".
2429 ;; `delay-mode-hooks' being non-nil will have prevented the major
2430 ;; mode's call to `run-mode-hooks' from calling
2431 ;; `hack-local-variables'. In that case, call it now.
2435 ;; Turn font lock off and on, to make sure it takes account of
2436 ;; whatever file local variables are relevant to it.
2438 ;; Font-lock-mode (now in font-core.el) can be ON when
2439 ;; font-lock.el still hasn't been loaded.
2446 "Non-nil means to try second pass through `auto-mode-alist'.
2447 This means that if the first case-sensitive search through the alist fails
2448 to find a matching major mode, a second case-insensitive search is made.
2449 On systems with case-insensitive file names, this variable is ignored,
2450 since only a single case-insensitive search through the alist is made."
2456 ;; Note: The entries for the modes defined in cc-mode.el (c-mode,
2457 ;; c++-mode, java-mode and more) are added through autoload
2458 ;; directives in that file. That way is discouraged since it
2459 ;; spreads out the definition of the initial value.
2505 ;; Less common extensions come here
2506 ;; so more common ones above are found faster.
2514 ;; Besides .gdbinit, gdb documents other names to be usable for init
2515 ;; files, cross-debuggers can use something like
2516 ;; .PROCESSORNAME-gdbinit so that the host and target gdbinit files
2517 ;; don't interfere with each other.
2519 ;; GDB 7.5 introduced OBJFILE-gdb.gdb script files; e.g. a file
2520 ;; named 'emacs-gdb.gdb', if it exists, will be automatically
2521 ;; loaded when GDB reads an objfile called 'emacs'.
2529 ("\\(/\\|\\`\\)\\.\\(bash_\\(profile\\|history\\|log\\(in\\|out\\)\\)\\|z?log\\(in\\|out\\)\\)\\'" . sh-mode)
2553 ;; The Fortran standard does not say anything about file extensions.
2554 ;; .f90 was widely used for F90, now we seem to be trapped into
2555 ;; using a different extension for each language revision.
2556 ;; Anyway, the following extensions are supported by gfortran.
2564 ;; The list of archive file extensions should be in sync with
2565 ;; `auto-coding-alist' with `no-conversion' coding system.
2571 ;; Mailer puts message to be edited in
2572 ;; /tmp/Re.... or Message
2575 ;; some news reader is reported to use this
2589 ;; .emacs or .gnus or .viper following a directory delimiter in
2590 ;; Unix or MS-DOS syntax.
2593 ;; _emacs following a directory delimiter in MS-DOS syntax
2597 ;; Linux-2.6.9 uses some different suffix for linker scripts:
2598 ;; "ld", "lds", "lds.S", "lds.in", "ld.script", and "ld.script.balo".
2599 ;; eCos uses "ld" and "ldi". Netbsd uses "ldscript.*".
2602 ;; .xs is also used for ld scripts, but seems to be more commonly
2603 ;; associated with Perl .xs files (C with Perl bindings). (Bug#7071)
2605 ;; Explained in binutils ld/genscripts.sh. Eg:
2606 ;; A .x script file is the default script.
2607 ;; A .xr script is for linking without relocation (-r flag). Etc.
2611 ;; Common Lisp ASDF package system.
2618 ("\\.\\(?:PDF\\|DVI\\|OD[FGPST]\\|DOCX?\\|XLSX?\\|PPTX?\\|pdf\\|djvu\\|dvi\\|od[fgpst]\\|docx?\\|xlsx?\\|pptx?\\)\\'" . doc-view-mode-maybe)
2630 ;; Windows candidates may be opened case sensitively on Unix
2638 ("\\`/etc/\\(?:DIR_COLORS\\|ethers\\|.?fstab\\|.*hosts\\|lesskey\\|login\\.?de\\(?:fs\\|vperm\\)\\|magic\\|mtab\\|pam\\.d/.*\\|permissions\\(?:\\.d/.+\\)?\\|protocols\\|rpc\\|services\\)\\'" . conf-space-mode)
2639 ("\\`/etc/\\(?:acpid?/.+\\|aliases\\(?:\\.d/.+\\)?\\|default/.+\\|group-?\\|hosts\\..+\\|inittab\\|ksysguarddrc\\|opera6rc\\|passwd-?\\|shadow-?\\|sysconfig/.+\\)\\'" . conf-mode)
2640 ;; ChangeLog.old etc. Other change-log-mode entries are above;
2641 ;; this has lower priority to avoid matching changelog.sgml etc.
2643 ;; either user's dot-files or under /etc or some such
2645 ;; alas not all ~/.*rc files are like this
2646 ("/\\.\\(?:enigma\\|gltron\\|gtk\\|hxplayer\\|net\\|neverball\\|qt/.+\\|realplayer\\|scummvm\\|sversion\\|sylpheed/.+\\|xmp\\)rc\\'" . conf-mode)
2651 ;; this contains everything twice, with space and with colon :-(
2653 ;; Get rid of any trailing .n.m and try again.
2654 ;; This is for files saved by cvs-merge that look like .#<file>.<rev>
2655 ;; or .#<file>.<rev>-<rev> or VC's <file>.~<rev>~.
2656 ;; Using mode nil rather than `ignore' would let the search continue
2657 ;; through this list (with the shortened name) rather than start over.
2660 ;; This should come after "in" stripping (e.g. config.h.in).
2661 ;; *.cf, *.cfg, *.conf, *.config[.local|.de_DE.UTF8|...], */config
2663 ;; The following should come after the ChangeLog pattern
2664 ;; for the sake of ChangeLog.1, etc.
2665 ;; and after the .scm.[0-9] and CVS' <file>.<rev> patterns too.
2667 "Alist of filename patterns vs corresponding major mode functions.
2668 Each element looks like (REGEXP . FUNCTION) or (REGEXP FUNCTION NON-NIL).
2669 \(NON-NIL stands for anything that is not nil; the value does not matter.)
2670 Visiting a file whose name matches REGEXP specifies FUNCTION as the
2671 mode function to use. FUNCTION will be called, unless it is nil.
2673 If the element has the form (REGEXP FUNCTION NON-NIL), then after
2674 calling FUNCTION (if it's not nil), we delete the suffix that matched
2675 REGEXP and search the list again for another match.
2677 The extensions whose FUNCTION is `archive-mode' should also
2678 appear in `auto-coding-alist' with `no-conversion' coding system.
2680 See also `interpreter-mode-alist', which detects executable script modes
2681 based on the interpreters they specify to run,
2686 "Select Conf mode or XML mode according to start of file."
2696 ;; Note: The entries for the modes defined in cc-mode.el (awk-mode
2697 ;; and pike-mode) are added through autoload directives in that
2698 ;; file. That way is discouraged since it spreads out the
2699 ;; definition of the initial value.
2728 "Alist mapping interpreter names to major modes.
2729 This is used for files whose first lines match `auto-mode-interpreter-regexp'.
2730 Each element looks like (REGEXP . MODE).
2731 If REGEXP matches the entire name (minus any directory part) of
2732 the interpreter specified in the first line of a script, enable
2733 major mode MODE.
2740 ;; TODO really this should be a list of modes (eg tar-mode), not regexps,
2741 ;; because we are duplicating info from auto-mode-alist.
2742 ;; TODO many elements of this list are also in auto-coding-alist.
2751 "List of regexps matching file names in which to ignore local variables.
2753 Files matching this list are typically binary file formats.
2754 They may happen to contain sequences that look like local variable
2755 specifications, but are not really, or they may be containers for
2756 member files with their own local variable sections, which are
2757 not appropriate for the containing file.
2764 "List of regexps matching suffixes to remove from file names.
2765 The function `inhibit-local-variables-p' uses this: when checking
2766 a file name, it first discards from the end of the name anything that
2769 ;; Can't think of any situation in which you'd want this to be nil...
2774 "Return non-nil if file local variables should be ignored.
2775 This checks the file (or buffer) name against `inhibit-local-variables-regexps'
2776 and `inhibit-local-variables-suffixes'. If
2777 `inhibit-local-variables-ignore-case' is non-nil, this ignores case."
2786 sufs)
2791 temp))
2796 "Regexp matching interpreters, for file mode determination.
2797 This regular expression is matched against the first line of a file
2798 to determine the file's mode in `set-auto-mode'. If it matches, the file
2799 is assumed to be interpreted by the interpreter matched by the second group
2800 of the regular expression. The mode is then determined as the mode
2804 "Alist of buffer beginnings vs. corresponding major mode functions.
2805 Each element looks like (REGEXP . FUNCTION) or (MATCH-FUNCTION . FUNCTION).
2806 After visiting a file, if REGEXP matches the text at the beginning of the
2807 buffer, or calling MATCH-FUNCTION returns non-nil, `normal-mode' will
2808 call FUNCTION rather than allowing `auto-mode-alist' to decide the buffer's
2809 major mode.
2811 If FUNCTION is nil, then it is not called. (That is a way of saying
2819 ;; The < comes before the groups (but the first) to reduce backtracking.
2820 ;; TODO: UTF-16 <?xml may be preceded by a BOM 0xff 0xfe or 0xfe 0xff.
2821 ;; We use [ \t\r\n] instead of `\\s ' to make regex overflow less likely.
2825 comment-re "*"
2828 . mhtml-mode)
2830 ;; These two must come after html, because they are more general:
2835 . sgml-mode)
2838 "Like `magic-mode-alist' but has lower priority than `auto-mode-alist'.
2839 Each element looks like (REGEXP . FUNCTION) or (MATCH-FUNCTION . FUNCTION).
2840 After visiting a file, if REGEXP matches the text at the beginning of the
2841 buffer, or calling MATCH-FUNCTION returns non-nil, `normal-mode' will
2842 call FUNCTION, provided that `magic-mode-alist' and `auto-mode-alist'
2843 have not specified a mode for this file.
2849 "Upper limit on `magic-mode-alist' regexp matches.
2853 "Select major mode appropriate for current buffer.
2855 To find the right major mode, this function checks for a -*- mode tag
2856 checks for a `mode:' entry in the Local Variables section of the file,
2857 checks if it uses an interpreter listed in `interpreter-mode-alist',
2858 matches the buffer beginning against `magic-mode-alist',
2859 compares the filename against the entries in `auto-mode-alist',
2860 then matches the buffer beginning against `magic-fallback-mode-alist'.
2862 If `enable-local-variables' is nil, or if the file name matches
2863 `inhibit-local-variables-regexps', this function does not check
2864 for any mode: tag anywhere in the file. If `local-enable-local-variables'
2865 is nil, then the only mode: tag that can be relevant is a -*- one.
2867 If the optional argument KEEP-MODE-IF-SAME is non-nil, then we
2868 set the major mode only if that would change it. In other words
2869 we don't actually set it to the same mode the buffer already has."
2870 ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*-
2872 end done mode modes)
2873 ;; Once we drop the deprecated feature where mode: is also allowed to
2874 ;; specify minor-modes (ie, there can be more than one "mode:"), we can
2875 ;; remove this section and just let (hack-local-variables t) handle it.
2876 ;; Find a -*- mode tag.
2880 ;; Note by design local-enable-local-variables does not matter here.
2882 try-locals
2885 ;; Find all specifications for the `mode:' variable
2886 ;; and execute them left to right.
2898 modes)))
2899 ;; Simple -*-MODE-*- case.
2902 modes))))
2903 ;; If we found modes to use, invoke them now, outside the save-excursion.
2911 ;; continuing would call minor modes again, toggling them off
2913 ;; hack-local-variables checks local-enable-local-variables etc, but
2914 ;; we might as well be explicit here for the sake of clarity.
2916 enable-local-variables
2917 local-enable-local-variables
2918 try-locals
2925 ;; If we didn't, look for an interpreter specified in the first line.
2926 ;; As a special case, allow for things like "#!/bin/env perl", which
2927 ;; finds the interpreter anywhere in $PATH.
2933 ;; Map interpreter name to a mode, signaling we're done at the
2934 ;; same time.
2941 interpreter-mode-alist)
2943 ;; If we found an interpreter mode to use, invoke it now.
2945 ;; Next try matching the buffer beginning against magic-mode-alist.
2954 nil magic-mode-alist
2963 "Problem in magic-mode-alist with element %s"
2964 re))))))))
2966 ;; Next compare the filename against the entries in auto-mode-alist.
2972 buffer-file-name)))
2973 ;; Remove backup-suffixes from file name.
2975 ;; Remove remote file name identification.
2980 ;; Find first matching alist entry.
2983 ;; Filesystem is case-insensitive.
2987 ;; Filesystem is case-sensitive.
2989 ;; First match case-sensitively.
2993 ;; Fallback to case-insensitive match.
3007 ;; Next try matching the buffer beginning against magic-fallback-mode-alist.
3024 "Problem with magic-fallback-mode-alist element: %s"
3025 re))))))))
3030 ;; When `keep-mode-if-same' is set, we are working on behalf of
3031 ;; set-visited-file-name. In that case, if the major mode specified is the
3032 ;; same one we already have, don't actually reset it. We don't want to lose
3033 ;; minor modes such as Font Lock.
3035 "Apply MODE and return it.
3036 If optional arg KEEP-MODE-IF-SAME is non-nil, MODE is chased of
3037 any aliases and compared to current major mode. If they are the
3038 same, do nothing and return nil."
3044 mode)))
3047 "Regexp of lines to skip when looking for file-local settings.
3048 If the first line matches this regular expression, then the -*-...-*- file-
3052 "Find the -*- spec in the buffer.
3053 Call with point at the place to start searching from.
3054 If one is found, set point to the beginning and return the position
3055 of the end. Otherwise, return nil; may change point.
3056 The variable `inhibit-local-variables-regexps' can cause a -*- spec to
3057 be ignored; but `enable-local-variables' and `local-enable-local-variables'
3058 have no effect."
3061 ;; Don't look for -*- if this file name matches any
3062 ;; of the regexps in inhibit-local-variables-regexps.
3065 ;; If the file begins with "#!" (exec
3066 ;; interpreter magic), look for mode frobs
3067 ;; in the first two lines. You cannot
3068 ;; necessarily put them in the first line
3069 ;; of such a file without screwing up the
3070 ;; interpreter invocation. The same holds
3071 ;; for '\" in man pages (preprocessor
3072 ;; magic for the `man' program).
3083 end))))
3084 \f
3085 ;;; Handling file local variables
3089 file-local-variables-alist dir-local-variables-alist)
3094 "Normal hook run after processing a file's local variables specs.
3095 Major modes can use this to examine user-specified local variables
3099 "List variable-value pairs that are considered safe.
3100 Each element is a cons cell (VAR . VAL), where VAR is a variable
3101 symbol and VAL is a value that is considered safe."
3102 :risky t
3107 ;; This should be here at least as long as Emacs supports write-file-hooks.
3112 "Expressions that are considered safe in an `eval:' local variable.
3113 Add expressions to this list if you want Emacs to evaluate them, when
3114 they appear in an `eval' local variable specification, without first
3115 asking you for confirmation."
3116 :risky t
3121 ;; Risky local variables:
3124 buffer-auto-save-file-name
3125 buffer-file-name
3126 buffer-file-truename
3127 buffer-undo-list
3128 debugger
3129 default-text-properties
3130 eval
3131 exec-directory
3132 exec-path
3133 file-name-handler-alist
3134 frame-title-format
3135 global-mode-string
3136 header-line-format
3137 icon-title-format
3138 inhibit-quit
3139 load-path
3140 max-lisp-eval-depth
3141 max-specpdl-size
3142 minor-mode-map-alist
3143 minor-mode-overriding-map-alist
3144 mode-line-format
3145 mode-name
3146 overriding-local-map
3147 overriding-terminal-local-map
3148 process-environment
3149 standard-input
3150 standard-output
3151 unread-command-events))
3153 ;; Safe local variables:
3154 ;;
3155 ;; For variables defined by major modes, the safety declarations can go into
3156 ;; the major mode's file, since that will be loaded before file variables are
3157 ;; processed.
3158 ;;
3159 ;; For variables defined by minor modes, put the safety declarations in the
3160 ;; file defining the minor mode after the defcustom/defvar using an autoload
3161 ;; cookie, e.g.:
3162 ;;
3163 ;; ;;;###autoload(put 'variable 'safe-local-variable 'stringp)
3164 ;;
3165 ;; Otherwise, when Emacs visits a file specifying that local variable, the
3166 ;; minor mode file may not be loaded yet.
3167 ;;
3168 ;; For variables defined in the C source code the declaration should go here:
3190 "Alist of file-local variable settings in the current buffer.
3191 Each element in this list has the form (VAR . VALUE), where VAR
3192 is a file-local variable (a symbol) and VALUE is the value
3193 specified. The actual value in the buffer may differ from VALUE,
3199 "Alist of directory-local variable settings in the current buffer.
3200 Each element in this list has the form (VAR . VALUE), where VAR
3201 is a directory-local variable (a symbol) and VALUE is the value
3202 specified in .dir-locals.el. The actual value in the buffer
3203 may differ from VALUE, if it is changed by the major or minor modes,
3208 "Normal hook run before setting file-local variables.
3209 It is called after checking for unsafe/risky variables and
3210 setting `file-local-variables-alist', and before applying the
3211 variables stored in `file-local-variables-alist'. A hook
3212 function is allowed to change the contents of this alist.
3214 This hook is called only if there is at least one file-local
3218 "Get confirmation before setting up local variable values.
3219 ALL-VARS is the list of all variables to be set up.
3220 UNSAFE-VARS is the list of those that aren't marked as safe or risky.
3221 RISKY-VARS is the list of those that are marked as risky.
3222 If these settings come from directory-local variables, then
3223 DIR-NAME is the name of the associated directory. Otherwise it is nil."
3230 unsafe-vars))
3232 ;; Set up the contents of the *Local Variables* buffer.
3240 ", and variables that are risky (**)."
3248 y -- to apply the local variables list.
3252 ! -- to apply the local variables list, and permanently mark these
3264 ;; Make strings with embedded whitespace easier to read.
3272 ;; Display the buffer and read a choice.
3280 ""
3283 char)
3302 "Return local variables specified in the -*- line.
3303 Usually returns an alist of elements (VAR . VAL), where VAR is a
3304 variable and VAL is the specified value. Ignores any
3305 specification for `coding:', and sometimes for `mode' (which
3306 should have already been handled by `set-auto-coding' and
3307 `set-auto-mode', respectively). Return nil if the -*- line is
3308 malformed.
3310 If HANDLE-MODE is nil, we return the alist of all the local
3311 variables in the line except `coding' as described above. If it
3312 is neither nil nor t, we do the same, except that any settings of
3313 `mode' and `coding' are ignored. If HANDLE-MODE is t, we ignore
3314 all settings in the line except for `mode', which \(if present) we
3315 return as the symbol specifying the mode."
3320 result)
3322 nil)
3324 ;; Simple form: "-*- MODENAME -*-".
3328 ;; Hairy form: '-*-' [ <variable> ':' <value> ';' ]* '-*-'
3329 ;; (last ";" is optional).
3330 ;; If HANDLE-MODE is t, just check for `mode'.
3331 ;; Otherwise, parse the -*- line into the RESULT alist.
3339 ;; There used to be a downcase here,
3340 ;; but the manual didn't say so,
3341 ;; and people want to set var names that aren't all lc.
3347 ;; It is traditional to ignore
3348 ;; case when checking for `mode' in set-auto-mode,
3349 ;; so we must do that here as well.
3350 ;; That is inconsistent, but we're stuck with it.
3351 ;; The same can be said for `coding' in set-auto-coding.
3365 ;; Downcase "Mode:".
3368 val)
3369 result)
3372 result))))))
3375 "Filter local variable settings, querying the user if necessary.
3376 VARIABLES is the alist of variable-value settings. This alist is
3377 filtered based on the values of `ignored-local-variables',
3378 `enable-local-eval', `enable-local-variables', and (if necessary)
3379 user interaction. The results are added to
3380 `file-local-variables-alist', without applying them.
3381 If these settings come from directory-local variables, then
3382 DIR-NAME is the name of the associated directory. Otherwise it is nil."
3383 ;; Find those variables that we may want to save to
3384 ;; `safe-local-variable-values'.
3390 ;; Ignore any variable in `ignored-local-variables'.
3391 nil)
3392 ;; Obey `enable-local-eval'.
3396 ;; In case previously marked safe (bug#5636).
3398 ;; If not safe and e-l-v = :safe, ignore totally.
3402 safe
3404 ;; Ignore duplicates (except `mode') in the present list.
3406 ;; Accept known-safe variables.
3410 ;; The variable is either risky or unsafe:
3417 ;; Query, unless all vars are safe or user wants no querying.
3423 risky-vars dir-name))
3433 ;; TODO? Warn once per file rather than once per session?
3437 "Parse and put into effect this buffer's local variables spec.
3438 Uses `hack-local-variables-apply' to apply the variables.
3440 If HANDLE-MODE is nil, we apply all the specified local
3441 variables. If HANDLE-MODE is neither nil nor t, we do the same,
3442 except that any settings of `mode' are ignored.
3445 is specified, and return the corresponding mode symbol, or nil.
3446 In this case, we try to ignore minor-modes, and only return a
3447 major-mode.
3449 If `enable-local-variables' or `local-enable-local-variables' is nil,
3450 this function does nothing. If `inhibit-local-variables-regexps'
3451 applies to the file in question, the file is not scanned for
3452 local variables, but directory-local variables may still be applied."
3453 ;; We don't let inhibit-local-variables-p influence the value of
3454 ;; enable-local-variables, because then it would affect dir-local
3455 ;; variables. We don't want to search eg tar files for file local
3456 ;; variable sections, but there is no reason dir-locals cannot apply
3457 ;; to them. The real meaning of inhibit-local-variables-p is "do
3458 ;; not scan this file for local variables".
3461 result)
3465 ;; Note this is a no-op if enable-local-variables is nil.
3467 ;; This entire function is basically a no-op if enable-local-variables
3468 ;; is nil. All it does is set file-local-variables-alist to nil.
3470 ;; This part used to ignore enable-local-variables when handle-mode
3471 ;; was t. That was inappropriate, eg consider the
3472 ;; (artificial) example of:
3473 ;; (setq local-enable-local-variables nil)
3474 ;; Open a file foo.txt that contains "mode: sh".
3475 ;; It correctly opens in text-mode.
3476 ;; M-x set-visited-file name foo.c, and it incorrectly stays in text-mode.
3478 ;; If HANDLE-MODE is t, and the prop line specifies a
3479 ;; mode, then we're done, and have no need to scan further.
3481 handle-mode))
3483 ;; Look for "Local variables:" line in last page.
3491 ;; suffix is what comes after "local variables:" in its line.
3492 ;; prefix is what comes before "local variables:" in its line.
3505 endpos
3511 nil t))
3512 ;; This used to be an error, but really all it means is
3513 ;; that this may simply not be a local-variables section,
3514 ;; so just ignore it.
3524 ;; Discard the prefix.
3529 ;; Discard the suffix.
3538 ;; Find the variable name;
3546 val val2)
3549 ;; Read the variable value.
3556 ;; Specifying minor-modes via mode: is
3557 ;; deprecated, but try to reject them anyway.
3567 'files
3569 "%s: `lexical-binding' at end of file unreliable"
3571 ;; We are called from
3572 ;; 'with-temp-buffer', so we need
3573 ;; to use 'thisbuf's name in the
3574 ;; warning message.
3580 'eval
3584 ;; Now we've read all the local variables.
3585 ;; If HANDLE-MODE is t, return whether the mode was specified.
3587 ;; Otherwise, set the variables.
3592 "Apply the elements of `file-local-variables-alist'.
3593 If there are any elements, runs `before-hack-local-variables-hook',
3594 then calls `hack-one-local-variable' to apply the alist elements one by one.
3595 Finishes by running `hack-local-variables-hook', regardless of whether
3596 the alist is empty or not.
3598 Note that this function ignores a `mode' entry if it specifies the same
3599 major mode as the buffer already has."
3601 ;; Any 'evals must run in the Right sequence.
3610 "Non-nil if SYM is safe as a file-local variable with value VAL.
3611 It is safe if any of these conditions are met:
3613 * There is a matching entry (SYM . VAL) in the
3614 `safe-local-variable-values' user option.
3616 * The `safe-local-variable' property of SYM is a function that
3617 evaluates to a non-nil value with VAL as an argument."
3621 ;; If the function signals an error, that means it
3622 ;; can't assure us that the value is safe.
3626 "Non-nil if SYM could be dangerous as a file-local variable.
3627 It is dangerous if either of these conditions are met:
3629 * Its `risky-local-variable' property is non-nil.
3635 ;; If this is an alias, check the base name.
3655 "Return t if it is safe to eval EXP when it is found in a file."
3657 ;; Detect certain `put' expressions.
3664 lisp-indent-function
3665 scheme-indent-function))
3666 ;; Only allow safe values (not functions).
3671 ;; Only allow indirect form specs.
3672 ;; During bootstrapping, edebug-basic-spec might not be
3673 ;; defined yet.
3677 ;; Allow expressions that the user requested.
3679 ;; Certain functions can be allowed with safe arguments
3680 ;; or can specify verification functions to try.
3682 ;; Allow (minor)-modes calls with no arguments.
3683 ;; This obsoletes the use of "mode:" for such things. (Bug#8613)
3692 ok))
3700 ok))))))))
3714 "Set local variable VAR with value VAL.
3715 If VAR is `mode', call `VAL-mode' as a function unless it's
3716 already the major mode."
3718 (`mode
3724 (`eval
3730 ;; Make sure the string has no text properties.
3731 ;; Some text properties can get evaluated in various ways,
3732 ;; so it is risky to put them on with a local variable list.
3736 \f
3737 ;;; Handling directory-local variables, aka project settings.
3743 "List of cached directory roots for directory-local variable classes.
3744 Each element in this list has the form (DIR CLASS MTIME).
3745 DIR is the name of the directory.
3746 CLASS is the name of a variable class (a symbol).
3747 MTIME is the recorded modification time of the directory-local
3748 variables file associated with this entry. This time is a list
3749 of integers (the same format as `file-attributes'), and is
3750 used to test whether the cache entry is still valid.
3751 Alternatively, MTIME can be nil, which means the entry is always
3755 "Return the variable list for CLASS."
3759 "Collect directory-local variables from MODE-VARIABLES.
3760 VARIABLES is the initial list of variables.
3761 Returns the new list."
3766 ;; If variables are specified more than once, only use the last. (Why?)
3767 ;; The pseudo-variables mode and eval are different (bug#3430).
3770 ;; Need a new cons in case we setcdr later.
3774 "Collect entries from CLASS-VARIABLES into VARIABLES.
3775 ROOT is the root directory of the project.
3776 Return the new variables list."
3778 ;; Handle non-file buffers, too.
3782 ;; FIXME: Why not use file-relative-name?
3789 ;; Don't include this in the previous condition, because we
3790 ;; want to filter all strings before the next condition.
3804 ;; TODO someone might want to extend this to allow
3805 ;; integer values for subdir, where N means
3806 ;; variables apply to this directory and N levels
3807 ;; below it (0 == nil).
3810 alist variables))))))))
3812 ;; The file's content might be invalid (e.g. have a merge conflict), but
3813 ;; that shouldn't prevent the user from opening the file.
3815 nil))))
3818 "Declare that the DIRECTORY root is an instance of CLASS.
3819 DIRECTORY is the name of a directory, a string.
3820 CLASS is the name of a project class, a symbol.
3821 MTIME is either the modification time of the directory-local
3822 variables file that defined this class, or nil.
3824 When a file beneath DIRECTORY is visited, the mode-specific
3825 variables from CLASS are applied to the buffer. The variables
3826 for a class are defined using `dir-locals-set-class-variables'."
3833 "Map the type CLASS to a list of variable settings.
3834 CLASS is the project class, a symbol. VARIABLES is a list
3835 that declares directory-local variables for the class.
3836 An element in VARIABLES is either of the form:
3837 (MAJOR-MODE . ALIST)
3838 or
3839 (DIRECTORY . LIST)
3841 In the first form, MAJOR-MODE is a symbol, and ALIST is an alist
3842 whose elements are of the form (VARIABLE . VALUE).
3844 In the second form, DIRECTORY is a directory name (a string), and
3845 LIST is a list of the form accepted by the function.
3847 When a file is visited, the file's class is found. A directory
3848 may be assigned a class using `dir-locals-set-directory-class'.
3849 Then variables are set in the file's buffer according to the
3850 VARIABLES list of the class. The list is processed in order.
3852 * If the element is of the form (MAJOR-MODE . ALIST), and the
3853 buffer's major mode is derived from MAJOR-MODE (as determined
3854 by `derived-mode-p'), then all the variables in ALIST are
3855 applied. A MAJOR-MODE of nil may be used to match any buffer.
3856 `make-local-variable' is called for each variable before it is
3857 set.
3859 * If the element is of the form (DIRECTORY . LIST), and DIRECTORY
3860 is an initial substring of the file's directory, then LIST is
3861 applied by recursively following these rules."
3865 "File that contains directory-local variables.
3866 It has to be constant to enforce uniform values across different
3867 environments and users.
3868 See also `dir-locals-file-2', whose values override this one's.
3872 "File that contains directory-local variables.
3873 This essentially a second file that can be used like
3874 `dir-locals-file', so that users can have specify their personal
3875 dir-local variables even if the current directory already has a
3876 `dir-locals-file' that is shared with other users (such as in a
3877 git repository).
3881 "Return a list of all readable dir-locals files in DIRECTORY.
3882 The returned list is sorted by increasing priority. That is,
3883 values specified in the last file should take precedence over
3884 those in the first."
3888 dir-locals-file)
3889 directory))
3893 ;; The order here is important.
3900 out)))
3903 "Find the directory-local variables for FILE.
3904 This searches upward in the directory tree from FILE.
3905 It stops at the first directory that has been registered in
3906 `dir-locals-directory-cache' or contains a `dir-locals-file'.
3907 If it finds an entry in the cache, it checks that it is valid.
3908 A cache entry with no modification time element (normally, one that
3909 has been assigned directly using `dir-locals-set-directory-class', not
3910 set from a file) is always valid.
3911 A cache entry based on a `dir-locals-file' is valid if the modification
3912 time stored in the cache matches the current file modification time.
3913 If not, the cache entry is cleared so that the file will be re-read.
3915 This function returns either:
3916 - nil (no directory local variables found),
3917 - the matching entry from `dir-locals-directory-cache' (a list),
3918 - or the full path to the directory (a string) containing at
3919 least one `dir-locals-file' in the case of no valid cache
3920 entry."
3924 dir-elt)
3925 ;; `locate-dominating-file' may have abbreviated the name.
3928 ;; Find the best cached value in `dir-locals-directory-cache'.
3939 ;; Found a potential cache entry. Check validity.
3940 ;; A cache entry with no MTIME is assumed to always be valid
3941 ;; (ie, set directly, not from a dir-locals file).
3942 ;; Note, we don't bother to check that there is a matching class
3943 ;; element in dir-locals-class-alist, since that's done by
3944 ;; dir-locals-set-directory-class.
3947 ;; The entry MTIME should match the most recent
3948 ;; MTIME among matching files.
3956 ;; This cache entry is OK.
3957 dir-elt
3958 ;; This cache entry is invalid; clear it.
3961 ;; Return the first existing dir-locals file. Might be the same
3962 ;; as dir-elt's, might not (eg latter might have been deleted).
3963 locals-dir)
3964 ;; No cache entry.
3965 locals-dir)))
3968 "Load all variables files in DIR and register a new class and instance.
3969 DIR is the absolute name of a directory which must contain at
3970 least one dir-local file (which is a file holding variables to
3971 apply).
3972 Return the new class name, which is a symbol named DIR."
3977 ;; If there was a problem, use the values we could get but
3978 ;; don't let the cache prevent future reads.
3991 variables
3997 class-name))
4003 "Non-nil means dir-local variables will be applied to remote files."
4011 "Read per-directory local variables for the current buffer.
4012 Store the directory-local variables in `dir-local-variables-alist'
4013 and `file-local-variables-alist', without applying them.
4015 This does nothing if either `enable-local-variables' or
4016 `enable-dir-local-variables' are nil."
4018 enable-dir-local-variables
4021 default-directory)))))
4022 ;; Find the variables file.
4052 "Apply directory-local variables to a non-file buffer.
4053 For non-file buffers, such as Dired buffers, directory-local
4054 variables are looked for in `default-directory' and its parent
4055 directories."
4059 \f
4062 However, the mode will not be changed if
4063 \(1) a local variables list or the `-*-' line specifies a major mode, or
4065 not suitable for ordinary files, or
4066 \(3) the new file name does not particularly specify any mode."
4071 "Change name of file visited in current buffer to FILENAME.
4072 This also renames the buffer to correspond to the new file.
4073 The next time the buffer is saved it will go in the newly specified file.
4074 FILENAME nil or an empty string means mark buffer as not visiting any file.
4075 Remember to delete the initial contents of the minibuffer
4076 if you wish to pass an empty string as the argument.
4078 The optional second argument NO-QUERY, if non-nil, inhibits asking for
4079 confirmation in the case where another buffer is already visiting FILENAME.
4081 The optional third argument ALONG-WITH-FILE, if non-nil, means that
4082 the old visited file has been renamed to the new name FILENAME."
4090 nil
4105 filename)))
4112 buffer-file-name filename)
4116 ;; If new-name == old-name, renaming would add a spurious <2>
4117 ;; and it's considered as a feature in rename-buffer.
4123 ;; Abbreviate the file names of the buffer.
4132 nil))
4133 ;; write-file-functions is normally used for things like ftp-find-file
4134 ;; that visit things that are not local files as if they were files.
4135 ;; Changing to visit an ordinary local file instead should flush the hook.
4140 ;; If buffer was read-only because of version control,
4141 ;; that reason is gone now, so make it writable.
4145 ;; Turn off backup files for certain file names.
4146 ;; Since this is a permanent local, the major mode won't eliminate it.
4148 backup-enable-predicate
4157 ;; If auto-save was not already on, turn it on if appropriate.
4160 ;; If auto save is on, start using a new name. We
4161 ;; deliberately don't rename or delete the old auto save
4162 ;; for the old visited file name. This is because
4163 ;; perhaps the user wants to save the new state and then
4164 ;; compare with the previous state from the auto save
4165 ;; file.
4167 ;; Rename the old auto save file if any.
4174 ;; Update the major mode, if the file name determines it.
4176 ;; Don't change the mode if it is special.
4179 ;; Don't change the mode if the local variable list specifies it.
4180 ;; The file name can influence whether the local variables apply.
4182 ;; h-l-v also checks it, but might as well be explicit.
4185 ;; TODO consider making normal-mode handle this case.
4193 "Write current buffer into file FILENAME.
4194 This makes the buffer visit that file, and marks it as not modified.
4196 If you specify just a directory name as FILENAME, that means to use
4197 the default file name but in that directory. You can also yank
4198 the default file name into the minibuffer to edit it, using \\<minibuffer-local-map>\\[next-history-element].
4200 If the buffer is not already visiting a file, the default file name
4201 for the output file is the buffer name.
4203 If optional second arg CONFIRM is non-nil, this function
4204 asks for confirmation before overwriting an existing file.
4205 Interactively, confirmation is required unless you supply a prefix argument."
4206 ;; (interactive "FWrite file: ")
4210 nil nil nil nil)
4214 default-directory)
4215 nil nil))
4219 ;; If arg is a directory name,
4220 ;; use the default file name, but in that directory.
4227 ;; NS does its own confirm dialog.
4230 use-dialog-box))
4236 ;; Make buffer writable if file is writable.
4241 ;; It's likely that the VC status at the new location is different from
4242 ;; the one at the old location.
4244 \f
4246 "Return an alist of extended attributes of file FILENAME.
4248 Extended attributes are platform-specific metadata about the file,
4249 such as SELinux context, list of ACL entries, etc."
4254 "Set extended attributes of file FILENAME to ATTRIBUTES.
4256 ATTRIBUTES must be an alist of file attributes as returned by
4257 `file-extended-attributes'.
4258 Value is t if the function succeeds in setting the attributes."
4269 result))
4270 \f
4272 "Make a backup of the disk file visited by the current buffer, if appropriate.
4273 This is normally done before saving the buffer the first time.
4275 A backup may be done by renaming or by copying; see documentation of
4276 variable `make-backup-files'. If it's done by renaming, then the file is
4277 no longer accessible under its old name.
4279 The value is non-nil after a backup was made by renaming.
4280 It has the form (MODES EXTENDED-ATTRIBUTES BACKUPNAME).
4281 MODES is the result of `file-modes' on the original
4282 file; this means that the caller, after saving the buffer, should change
4283 the modes of the new file to agree with the old modes.
4284 EXTENDED-ATTRIBUTES is the result of `file-extended-attributes'
4285 on the original file; this means that the caller, after saving
4286 the buffer, should change the extended attributes of the new file
4287 to agree with the old attributes.
4288 BACKUPNAME is the backup file name, which is the old file renamed."
4292 ;; If specified name is a symbolic link, chase it to the target.
4293 ;; This makes backups in the directory where the real file is.
4300 ;; If have old versions to maybe delete,
4301 ;; ask the user to confirm now, before doing anything.
4302 ;; But don't actually delete til later.
4308 real-file-name)))
4309 targets))
4314 backup-by-copying-when-privileged-mismatch)
4317 ;; Don't rename a suid or sgid file.
4326 real-file-name
4329 copy-when-priv-mismatch))))
4331 t)))))
4332 setmodes)
4335 ;; Actually make the backup file.
4338 modes extended-attributes)
4339 ;; rename-file should delete old backup.
4342 backupname)))
4344 ;; Now delete the old versions, if desired.
4348 ;; If trouble writing the backup, write it in .emacs.d/%backup%.
4352 backupname)
4355 modes extended-attributes)
4357 setmodes)))))))
4360 ;; Create temp files with strict access rights. It's easy to
4361 ;; loosen them later, whereas it's impossible to close the
4362 ;; time-window of loose permissions otherwise.
4365 ;; Try to overwrite old backup first.
4373 nil)
4375 ;; The file was somehow created by someone else between
4376 ;; `delete-file' and `copy-file', so let's try again.
4377 ;; rms says "I think there is also a possible race
4378 ;; condition for making backup files" (emacs-devel 20070821).
4379 nil)))
4380 ;; If set-file-extended-attributes fails, fall back on set-file-modes.
4389 ;; The last ~[[:digit]]+ matches relative versions in git,
4390 ;; e.g. `foo.js.~HEAD~1~'.
4391 "Regular expression matching the backup/version part of a file name.
4395 "Return file NAME sans backup versions or strings.
4396 This is a separate procedure so your site-init or startup file can
4397 redefine it.
4398 If the optional argument KEEP-BACKUP-VERSION is non-nil,
4399 we do not remove backup version numbers, only true file version numbers.
4400 See also `file-name-version-regexp'."
4407 name))))))
4410 "Return t if deleting FILE and rewriting it would preserve the owner.
4411 Return also t if FILE does not exist. If GROUP is non-nil, check whether
4412 the group would be preserved too."
4417 ;; Return t if the file doesn't exist, since it's true that no
4418 ;; information would be lost by an (attempted) delete and create.
4421 ;; Files created on Windows by Administrator (RID=500)
4422 ;; have the Administrators group (RID=544) recorded as
4423 ;; their owner. Rewriting them will still preserve the
4424 ;; owner.
4428 ;; On BSD-derived systems files always inherit the parent
4429 ;; directory's group, so skip the group-gid test.
4435 ;; On some systems, a file created in a setuid directory
4436 ;; inherits that directory's owner.
4440 ;; On many systems, a file created in a setgid directory
4441 ;; inherits that directory's group. On some systems
4442 ;; this happens even if the setgid bit is not set.
4449 The extension, in a file name, is the part that begins with the last `.',
4450 except that a leading `.' of the file name, if there is one, doesn't count."
4453 directory)
4457 ;; Don't use expand-file-name here; if DIRECTORY is relative,
4458 ;; we don't want to expand it.
4461 filename))))
4465 The extension, in a file name, is the part that begins with the last `.',
4466 excluding version numbers and backup suffixes, except that a leading `.'
4467 of the file name, if there is one, doesn't count.
4468 Return nil for extensionless file names such as `foo'.
4469 Return the empty string for file names such as `foo.'.
4471 By default, the returned value excludes the period that starts the
4472 extension, but if the optional argument PERIOD is non-nil, the period
4473 is included in the value, and in that case, if FILENAME has no
4484 "Return the base name of the FILENAME: no directory, no extension.
4485 FILENAME defaults to `buffer-file-name'."
4490 #'make-backup-file-name--default-function
4491 "A function that `make-backup-file-name' uses to create backup file names.
4492 The function receives a single argument, the original file name.
4494 If you change this, you may need to change `backup-file-name-p' and
4495 `file-name-sans-versions' too.
4497 You could make this buffer-local to do something special for specific files.
4499 For historical reasons, a value of nil means to use the default function.
4500 This should not be relied upon.
4502 See also `backup-directory-alist'."
4509 "Alist of filename patterns and backup directory names.
4510 Each element looks like (REGEXP . DIRECTORY). Backups of files with
4511 names matching REGEXP will be made in DIRECTORY. DIRECTORY may be
4512 relative or absolute. If it is absolute, so that all matching files
4513 are backed up into the same directory, the file names in this
4514 directory will be the full name of the file backed up with all
4515 directory separators changed to `!' to prevent clashes. This will not
4516 work correctly if your filesystem truncates the resulting name.
4518 For the common case of all backups going into one directory, the alist
4520 directory name.
4522 If this variable is nil, or it fails to match a filename, the backup
4523 is made in the original file's directory.
4525 On MS-DOS filesystems without long names this variable is always
4526 ignored."
4532 "Default `backup-enable-predicate' function.
4533 Checks for files in `temporary-file-directory',
4536 caseless)
4537 ;; On MS-Windows, file-truename will convert short 8+3 aliases to
4538 ;; their long file-name equivalents, so compare-strings does TRT.
4542 caseless t))
4545 ;; Directory is under temporary-file-directory.
4550 ;; Directory is under /tmp.
4555 0 nil
4557 ;; Directory is under small-temporary-file-directory.
4562 "Create the non-numeric backup file name for FILE.
4563 This calls the function that `make-backup-file-name-function' specifies,
4564 with a single argument FILE."
4567 file))
4570 "Default function for `make-backup-file-name'.
4571 Normally this just returns FILE's name with `~' appended.
4572 It searches for a match for FILE in `backup-directory-alist'.
4573 If the directory for the backup doesn't exist, it is created."
4585 "Subroutine of `make-backup-file-name--default-function'.
4586 The function `find-backup-file-name' also uses this."
4588 elt backup-directory abs-backup-directory)
4593 alist nil)))
4594 ;; If backup-directory is relative, it should be relative to the
4595 ;; file's directory. By expanding explicitly here, we avoid
4596 ;; depending on default-directory.
4605 abs-backup-directory nil))))
4607 file
4611 ;; Normalize DOSish file names: downcase the drive
4612 ;; letter, if any, and replace the leading "x:" with
4613 ;; "/drive_x".
4616 ;; Replace any invalid file-name characters (for the
4617 ;; case of backing up remote files).
4621 "drive_"
4624 ""
4627 ;; Make the name unique by substituting directory
4628 ;; separators. It may not really be worth bothering about
4629 ;; doubling `!'s in the original name...
4634 backup-directory))
4639 "Return non-nil if FILE is a backup file name (numeric or not).
4640 This is a separate function so you can redefine it for customization.
4641 You may need to redefine `file-name-sans-versions' as well."
4646 ;; This is used in various files.
4647 ;; The usage of backup-extract-version-start is not very clean,
4648 ;; but I can't see a good alternative, so as of now I am leaving it alone.
4650 "Given the name of a numeric backup file, FN, return the backup number.
4651 Uses the free variable `backup-extract-version-start', whose value should be
4652 the index in the name where the version number begins."
4659 "Find a file name for a backup file FN, and suggestions for deletions.
4660 Value is a list whose car is the name for the backup file
4661 and whose cdr is a list of old versions to consider deleting now.
4662 If the value is nil, don't make a backup.
4663 Uses `backup-directory-alist' in the same way as
4664 `make-backup-file-name--default-function' does."
4666 ;; Run a handler for this function so that ange-ftp can refuse to do it.
4670 ;; We don't support numbered backups on plain MS-DOS
4671 ;; when long file names are unavailable.
4681 possibilities deserve-versions-p versions)
4684 base-versions
4687 possibilities)
4688 #'<)
4693 kept-old-versions
4694 kept-new-versions
4701 ;; Delete nothing if there is overflow
4702 ;; in the number of versions to keep.
4708 v))))))))))
4711 "Return number of names file FILENAME has."
4715 "Convert FILENAME to be relative to DIRECTORY (default: `default-directory').
4716 This function returns a relative file name which is equivalent to FILENAME
4717 when used with that default directory as the default.
4718 If FILENAME is a relative file name, it will be interpreted as existing in
4719 `default-directory'.
4720 If FILENAME and DIRECTORY lie on different machines or on different drives
4721 on a DOS/Windows machine, it returns FILENAME in expanded form."
4725 default-directory))))
4730 read-file-name-completion-ignore-case)))
4733 ;; Test for different filesystems on DOS/Windows
4735 ;; Should `cygwin' really be included here? --stef
4738 ;; Test for different drive letters
4740 ;; Test for UNCs on different servers
4745 ;; Windows file names cannot have ? in
4746 ;; them, so use that to detect when
4747 ;; neither FILENAME nor DIRECTORY is a
4748 ;; UNC.
4750 0 nil
4756 ;; Test for different remote file system identification
4758 filename
4766 ".."
4768 ;; Now ancestor is empty, or .., or ../.., etc.
4770 ;; We matched within FILENAME's directory part.
4771 ;; Add the rest of FILENAME onto ANCESTOR.
4774 ;; But don't bother with ANCESTOR if it would give us `./'.
4775 rest
4777 ;; We matched FILENAME's directory equivalent.
4778 ancestor))))))
4779 \f
4781 "Save current buffer in visited file if modified.
4782 Variations are described below.
4784 By default, makes the previous version into a backup file
4785 if previously requested or if this is the first save.
4787 to become a backup when the next save is done.
4789 makes the previous version into a backup file.
4791 to become a backup when the next save is done,
4792 and makes the previous version into a backup file.
4794 With a numeric prefix argument of 0, never make the previous version
4795 into a backup file.
4797 Note that the various variables that control backups, such
4798 as `version-control', `backup-enable-predicate', `vc-make-backup-files',
4799 and `backup-inhibited', to name just the more popular ones, still
4800 control whether a backup will actually be produced, even when you
4803 If a file's name is FOO, the names of its numbered backup versions are
4804 FOO.~i~ for various integers i. A non-numbered backup file is called FOO~.
4805 Numeric backups (rather than FOO~) will be made if value of
4806 `version-control' is not the atom `never' and either there are already
4807 numeric versions of the file being backed up, or `version-control' is
4808 non-nil.
4809 We don't want excessive versions piling up, so there are variables
4810 `kept-old-versions', which tells Emacs how many oldest versions to keep,
4811 and `kept-new-versions', which tells how many newest versions to keep.
4812 Defaults are 2 old versions and 2 new.
4813 `dired-kept-versions' controls dired's clean-directory (.) command.
4814 If `delete-old-versions' is nil, system will query user
4815 before trimming versions. Otherwise it does it silently.
4817 If `vc-make-backup-files' is nil, which is the default,
4818 no backup files are made for files managed by version control.
4819 (This is because the version control system itself records previous versions.)
4821 See the subroutine `basic-save-buffer' for more information."
4827 ;; We used to display the message below only for files > 50KB, but
4828 ;; then Rmail-mbox never displays it due to buffer swapping. If
4829 ;; the test is ever re-introduced, be sure to handle saving of
4830 ;; Rmail files.
4840 "Delete auto-save file for current buffer if `delete-auto-save-files' is t.
4841 Normally delete only if the file was written by this Emacs since
4842 the last real save, but optional arg FORCE non-nil means delete anyway."
4856 "Normal hook that is run before a buffer is saved to its file.
4857 Only used by `save-buffer'."
4863 "Normal hook that is run after a buffer is saved to its file.
4864 Only used by `save-buffer'."
4870 "If non-nil, use this coding system for saving the buffer.
4871 More precisely, use this coding system in place of the
4872 value of `buffer-file-coding-system', when saving the buffer.
4873 Calling `write-region' for any purpose other than saving the buffer
4874 will still use `buffer-file-coding-system'; this variable has no effect
4881 "Save the current buffer in its visited file, if it has been modified.
4883 The hooks `write-contents-functions', `local-write-file-hooks'
4884 and `write-file-functions' get a chance to do the job of saving;
4885 if they do not, then the buffer is saved in the visited file in
4886 the usual way.
4888 Before and after saving the buffer, this function runs
4889 `before-save-hook' and `after-save-hook', respectively."
4892 ;; In an indirect buffer, save its base buffer instead.
4896 ;; Handle the case when no modification has been made but
4897 ;; the file disappeared since visited.
4901 setmodes)
4907 "%s has changed since visited or saved. Save anyway? "
4928 ;; Don't let errors prevent saving the buffer.
4930 ;; Give `write-contents-functions' a chance to
4931 ;; short-circuit the whole process.
4933 ;; If buffer has no file name, ask user for one.
4941 ;; Signal an error if the user specified the name of an
4942 ;; existing directory.
4945 "File `%s' exists; overwrite? "
4946 filename))
4949 ;; Support VC version backups.
4953 ;; If a hook returned t, file is already "written".
4954 ;; Otherwise, write it the usual way now.
4964 ;; Now we have saved the current buffer. Let's make sure
4965 ;; that buffer-file-coding-system is fixed to what
4966 ;; actually used for saving by binding it locally.
4982 ;; Support VC `implicit' locking.
4984 ;; If the auto-save file was recent before this command,
4985 ;; delete it now.
4992 ;; This does the "real job" of writing a buffer into its visited file
4993 ;; and making a backup file. This is what is normally done
4994 ;; but inhibited if one of write-file-functions returns non-nil.
4995 ;; It returns a value (MODES EXTENDED-ATTRIBUTES BACKUPNAME), like
4996 ;; backup-buffer.
5006 ;; This returns a value (MODES EXTENDED-ATTRIBUTES BACKUPNAME), like
5007 ;; backup-buffer.
5020 "File %s is write-protected; try to save anyway? "
5022 buffer-file-name)))
5036 dir))))
5037 ;; Write temp name, then rename it.
5038 ;; This requires write access to the containing dir,
5039 ;; which is why we don't try it if we don't have that access.
5041 tempname
5043 ;; Create temp files with strict access rights. It's easy to
5044 ;; loosen them later, whereas it's impossible to close the
5045 ;; time-window of loose permissions otherwise.
5049 ;; Call write-region in the appropriate way
5050 ;; for saving the buffer.
5054 ;; Pass in nil&nil rather than point-min&max
5055 ;; cause we're saving the whole buffer.
5056 ;; write-region-annotate-functions may use it.
5058 buffer-file-truename)
5060 ;; If we failed, restore the buffer's modtime.
5063 ;; Since we have created an entirely new file,
5064 ;; make sure it gets the right permission bits set.
5069 buffer-file-name)))
5070 ;; We succeeded in writing the temp file,
5071 ;; so rename it.
5073 ;; If file not writable, see if we can make it writable
5074 ;; temporarily while we write it.
5075 ;; But no need to do so if we have just backed it up
5076 ;; (setmodes is set) because that says we're superseding.
5078 ;; Change the mode back, after writing.
5081 buffer-file-name))
5082 ;; If set-file-extended-attributes fails, fall back on
5083 ;; set-file-modes.
5093 ;; Pass in nil&nil rather than point-min&max to indicate
5094 ;; we're saving the buffer rather than just a region.
5095 ;; write-region-annotate-functions may make use of it.
5097 buffer-file-name nil t buffer-file-truename)
5100 ;; If we get an error writing the new file, and we made
5101 ;; the backup by renaming, undo the backing-up.
5106 setmodes))
5112 `((?\C-r
5119 ;; Return nil to ask about BUF again.
5120 nil)
5133 ;; Return nil to ask about BUF again.
5134 nil)
5144 "Default predicate for `save-some-buffers'.
5145 This allows you to stop `save-some-buffers' from asking
5146 about certain files that you'd usually rather not save."
5152 "Save some modified file-visiting buffers. Asks user about each one.
5153 You can answer `y' to save, `n' not to save, `C-r' to look at the
5154 buffer in question with `view-buffer' before deciding or `d' to
5155 view the differences using `diff-buffer-with-file'.
5157 This command first saves any buffers where `buffer-save-without-query' is
5158 non-nil, without asking.
5160 Optional argument (the prefix) non-nil means save all with no questions.
5161 Optional second argument PRED determines which buffers are considered:
5162 If PRED is nil, all the file-visiting buffers are considered.
5163 If PRED is t, then certain non-file buffers will also be considered.
5164 If PRED is a zero-argument function, it indicates for each buffer whether
5165 to consider it or not when called with that buffer current.
5166 PRED defaults to the value of `save-some-buffers-default-predicate'.
5168 See `save-some-buffers-action-alist' if you want to
5169 change the additional actions you can take on files."
5175 files-done abbrevs-done)
5177 ;; First save any buffers that we're supposed to save unconditionally.
5178 ;; That way the following code won't ask about them.
5183 ;; Ask about those buffers that merit it,
5184 ;; and record the number thus saved.
5188 ;; Note that killing some buffers may kill others via
5189 ;; hooks (e.g. Rmail and its viewing buffer).
5201 t
5213 save-some-buffers-action-alist))
5214 ;; Maybe to save abbrevs, and record whether
5215 ;; we either saved them or asked to.
5222 ;; Don't keep bothering user if he says no.
5236 \f
5238 "Clear out records of last mod time of visited file.
5239 Next attempt to save will not complain of a discrepancy."
5243 "Mark current buffer as unmodified, not needing to be saved.
5246 It is not a good idea to use this function in Lisp programs, because it
5247 prints a message in the minibuffer. Instead, use `set-buffer-modified-p'."
5255 "Change whether this buffer is read-only."
5263 "Insert contents of file FILENAME into buffer after point.
5264 Set mark after the inserted text.
5266 This function is meant for the user to run interactively.
5267 Don't call it from programs! Use `insert-file-contents' instead.
5268 \(Its calling sequence is different; see its documentation)."
5274 "Append the contents of the region to the end of file FILENAME.
5275 When called from a function, expects three arguments,
5276 START, END and FILENAME. START and END are normally buffer positions
5277 specifying the part of the buffer to write.
5278 If START is nil, that means to use the entire buffer contents.
5279 If START is a string, then output that string to the file
5280 instead of any buffer contents; END is ignored.
5282 This does character code conversion and applies annotations
5283 like `write-region' does."
5289 "Return most recent backup file for FILENAME or nil if no backups exist."
5290 ;; `make-backup-file-name' will get us the right directory for
5291 ;; ordinary or numeric backups. It might create a directory for
5292 ;; backups as a side-effect, according to `backup-directory-alist'.
5299 tem)
5308 newest))
5311 "Rename current buffer to a similar name not already taken.
5312 This function is useful for creating multiple shell process buffers
5313 or multiple mail buffers, etc.
5315 Note that some commands, in particular those based on `compilation-mode'
5316 \(`compile', `grep', etc.) will reuse the current buffer if it has the
5317 appropriate mode even if it has been renamed. So as well as renaming
5318 the buffer, you also need to switch buffers before running another
5319 instance of such commands."
5327 ;; If the existing buffer name has a <NNN>,
5328 ;; which isn't part of the file name (if any),
5329 ;; then get rid of that.
5335 "Make directory DIR if it is not already a directory. Return nil."
5343 "Create the directory DIR and optionally any nonexistent parent dirs.
5344 If DIR already exists as a directory, signal an error, unless
5345 PARENTS is non-nil.
5347 Interactively, the default choice of directory to create is the
5348 current buffer's default directory. That is useful when you have
5349 visited a file in a nonexistent directory.
5351 Noninteractively, the second (optional) argument PARENTS, if
5352 non-nil, says whether to create parent directories that don't
5353 exist. Interactively, this happens by default.
5355 If creating the directory or directories fail, an error will be
5356 raised."
5359 nil nil)
5360 t))
5361 ;; If default-directory is a remote directory,
5362 ;; make sure we find its make-directory handler.
5370 create-list parent)
5377 ;; Do not loop if root does not exist (Bug#2309).
5380 dir parent))
5389 "Use NO-SUCH to affect behavior of function FN applied to list ARGS.
5390 This acts like (apply FN ARGS) except it returns NO-SUCH if it is
5391 non-nil and if FN fails due to a missing file or directory."
5397 "Delete the directory named DIRECTORY. Does not follow symlinks.
5398 If RECURSIVE is non-nil, delete files in DIRECTORY as well, with
5399 no error if something else is simultaneously deleting them.
5400 TRASH non-nil means to trash the directory instead, provided
5401 `delete-by-moving-to-trash' is non-nil.
5403 When called interactively, TRASH is nil if and only if a prefix
5404 argument is given, and a further prompt asks the user for
5405 RECURSIVE if DIRECTORY is nonempty."
5412 "Move directory to trash: "
5414 default-directory default-directory nil nil))))
5420 nil)
5422 ;; If default-directory is a remote directory, make sure we find its
5423 ;; delete-directory handler.
5430 ;; Only move non-empty dir to trash if recursive deletion was
5431 ;; requested. This mimics the non-`delete-by-moving-to-trash'
5432 ;; case, where the operation fails in delete-directory-internal.
5433 ;; As `move-file-to-trash' trashes directories (empty or
5434 ;; otherwise) as a unit, we do not need to recurse here.
5436 ;; Check if directory is empty apart from "." and "..".
5441 ;; Otherwise, call ourselves recursively if needed.
5446 directory-files-no-dot-files-regexp))
5450 ;; This test is equivalent to but more efficient
5451 ;; than (and (file-directory-p fn)
5452 ;; (not (file-symlink-p fn))).
5456 files))
5457 directory-exists))
5461 "Return non-nil if files FILE1 and FILE2 name the same file.
5462 If FILE1 or FILE2 does not exist, the return value is unspecified."
5473 "Return non-nil if FILE is in DIR or a subdirectory of DIR.
5475 Return nil if DIR is not an existing directory."
5487 ;; A UNC on Windows systems, or a "super-root" on Apollo.
5502 "Copy DIRECTORY to NEWNAME. Both args must be strings.
5503 This function always sets the file modes of the output files to match
5504 the corresponding input file.
5506 The third arg KEEP-TIME non-nil means give the output files the same
5507 last-modified time as the old ones. (This works on only some systems.)
5509 A prefix arg makes KEEP-TIME non-nil.
5511 Noninteractively, the last argument PARENTS says whether to
5512 create parent directories if they don't exist. Interactively,
5513 this happens by default.
5515 If NEWNAME is a directory name, copy DIRECTORY as a subdirectory
5516 there. However, if called from Lisp with a non-nil optional
5517 argument COPY-CONTENTS, copy the contents of DIRECTORY directly
5518 into NEWNAME instead."
5525 default-directory default-directory nil nil)
5526 current-prefix-arg t nil)))
5529 directory newname))
5530 ;; If default-directory is a remote directory, make sure we find its
5531 ;; copy-directory handler.
5536 newname keep-time parents copy-contents)
5538 ;; Compute target name.
5543 ;; If NEWNAME is not a directory name, create it;
5544 ;; that is where we will copy the files of DIRECTORY.
5546 ;; NEWNAME is a directory name. If COPY-CONTENTS is non-nil,
5547 ;; create NEWNAME if it is not already a directory;
5548 ;; otherwise, create NEWNAME/[DIRECTORY-BASENAME].
5555 ;; Copy recursively.
5557 ;; We do not want to copy "." and "..".
5559 directory-files-no-dot-files-regexp))
5570 ;; Set directory attributes.
5576 \f
5577 ;; At time of writing, only info uses this.
5579 "Return a copy of DIRS with all non-existent directories removed.
5580 The optional argument KEEP is a list of directories to retain even if
5581 they don't exist, and REJECT is a list of directories to remove from
5582 DIRS, even if they exist; REJECT takes precedence over KEEP.
5584 Note that membership in REJECT and KEEP is checked using simple string
5585 comparison."
5591 dirs)))
5593 \f
5596 "Function to use to revert this buffer.
5597 The function receives two arguments IGNORE-AUTO and NOCONFIRM,
5598 which are the arguments that `revert-buffer' received.
5599 It also has access to the `preserve-modes' argument of `revert-buffer'
5600 via the `revert-buffer-preserve-modes' dynamic variable.
5602 For historical reasons, a value of nil means to use the default function.
5607 #'revert-buffer-insert-file-contents--default-function
5608 "Function to use to insert contents when reverting this buffer.
5609 The function receives two arguments: the first the nominal file name to use;
5610 the second is t if reading the auto-save file.
5612 The function is responsible for updating (or preserving) point.
5614 For historical reasons, a value of nil means to use the default function.
5618 "Default function to use for `buffer-stale-function'.
5619 This function ignores its argument.
5620 This returns non-nil if the current buffer is visiting a readable file
5621 whose modification time does not match that of the buffer.
5623 This function only handles buffers that are visiting files.
5624 Non-file buffers need a custom function"
5631 "Function to check whether a buffer needs reverting.
5632 This should be a function with one optional argument NOCONFIRM.
5633 Auto Revert Mode passes t for NOCONFIRM. The function should return
5634 non-nil if the buffer should be reverted. A return value of
5635 `fast' means that the need for reverting was not checked, but
5636 that reverting the buffer is fast. The buffer is current when
5637 this function is called.
5639 The idea behind the NOCONFIRM argument is that it should be
5640 non-nil if the buffer is going to be reverted without asking the
5641 user. In such situations, one has to be careful with potentially
5642 time consuming operations.
5644 For historical reasons, a value of nil means to use the default function.
5645 This should not be relied upon.
5647 For more information on how this variable is used by Auto Revert mode,
5651 "Normal hook for `revert-buffer' to run before reverting.
5652 The function `revert-buffer--default' runs this.
5656 "Normal hook for `revert-buffer' to run after reverting.
5657 Note that the hook value that it runs is the value that was in effect
5658 before reverting; that makes a difference if you have buffer-local
5659 hook functions.
5661 The function `revert-buffer--default' runs this.
5669 ;; `revert-buffer-function' was defined long ago to be a function of only
5670 ;; 2 arguments, so we have to use a dynbind variable to pass the
5671 ;; `preserve-modes' argument of `revert-buffer'.
5675 "Replace current buffer text with the text of the visited file on disk.
5676 This undoes all changes since the file was visited or saved.
5677 With a prefix argument, offer to revert from latest auto-save file, if
5678 that is more recent than the visited file.
5680 This command also implements an interface for special buffers
5681 that contain text which doesn't come from a file, but reflects
5682 some other data instead (e.g. Dired buffers, `buffer-list'
5683 buffers). This is done via the variable `revert-buffer-function'.
5684 In these cases, it should reconstruct the buffer contents from the
5685 appropriate data.
5687 When called from Lisp, the first argument is IGNORE-AUTO; only offer
5688 to revert from the auto-save file when this is nil. Note that the
5689 sense of this argument is the reverse of the prefix argument, for the
5690 sake of backward compatibility. IGNORE-AUTO is optional, defaulting
5691 to nil.
5693 Optional second argument NOCONFIRM means don't ask for confirmation
5694 at all. (The variable `revert-without-query' offers another way to
5695 revert buffers without querying for confirmation.)
5697 Optional third argument PRESERVE-MODES non-nil means don't alter
5698 the files modes. Normally we reinitialize them using `normal-mode'.
5700 This function binds `revert-buffer-in-progress-p' non-nil while it operates.
5702 This function calls the function that `revert-buffer-function' specifies
5703 to do the work, with arguments IGNORE-AUTO and NOCONFIRM.
5704 The default function runs the hooks `before-revert-hook' and
5705 `after-revert-hook'."
5706 ;; I admit it's odd to reverse the sense of the prefix argument, but
5707 ;; there is a lot of code out there which assumes that the first
5708 ;; argument should be t to avoid consulting the auto-save file, and
5709 ;; there's no straightforward way to encourage authors to notice a
5710 ;; reversal of the argument sense. So I'm just changing the user
5711 ;; interface, but leaving the programmatic interface the same.
5716 ignore-auto noconfirm)))
5719 "Default function for `revert-buffer'.
5720 The arguments IGNORE-AUTO and NOCONFIRM are as described for `revert-buffer'.
5721 Runs the hooks `before-revert-hook' and `after-revert-hook' at the
5722 start and end.
5724 Calls `revert-buffer-insert-file-contents-function' to reread the
5725 contents of the visited file, with two arguments: the first is the file
5726 name, the second is non-nil if reading an auto-save file.
5728 This function only handles buffers that are visiting files.
5729 Non-file buffers need a custom function."
5734 buffer-auto-save-file-name
5739 buffer-auto-save-file-name
5740 buffer-file-name)))
5750 file-name)))
5752 ;; If file was backed up but has changed since,
5753 ;; we should make another backup.
5757 ;; Effectively copy the after-revert-hook status,
5758 ;; since after-find-file will clobber it.
5761 after-revert-hook))
5763 ;; FIXME: Throw away undo-log when preserve-modes is nil?
5767 file-name auto-save-p)
5768 ;; Recompute the truename in case changes in symlinks
5769 ;; have changed the truename.
5773 ;; Run after-revert-hook as it was before we reverted.
5777 local-hook)
5780 t)))))
5783 "Default function for `revert-buffer-insert-file-contents-function'.
5784 The function `revert-buffer--default' calls this.
5785 FILE-NAME is the name of the file. AUTO-SAVE-P is non-nil if this is
5786 an auto-save file."
5790 "File %s no longer exists!"
5792 file-name))
5795 "File %s no longer readable!"
5797 file-name))
5799 ;; Bind buffer-file-name to nil
5800 ;; so that we don't try to lock the file.
5806 ;; Auto-saved file should be read by Emacs's
5807 ;; internal coding.
5811 buffer-file-coding-system-explicit
5814 coding-system-for-read
5816 coding-system-for-read)
5818 ;; As a coding system suitable for multibyte
5819 ;; buffer is specified, make the current
5820 ;; buffer multibyte.
5823 ;; This force after-insert-file-set-coding
5824 ;; (called from insert-file-contents) to set
5825 ;; buffer-file-coding-system to a proper value.
5828 ;; Note that this preserves point in an intelligent way.
5832 nil nil t))
5834 nil nil t))))))
5837 "Recover the visited file--get contents from its last auto-save file."
5844 "Visit file FILE, but get contents from its last auto-save file."
5845 ;; Actually putting the file name in the minibuffer should be used
5846 ;; only rarely.
5847 ;; Not just because users often use the default.
5860 "*Directory*" nil
5871 ;; Use insert-directory-safely, not insert-directory,
5872 ;; because these files might not exist. In particular,
5873 ;; FILE might not exist if the auto-save file was for
5874 ;; a buffer that didn't visit a file, such as "*mail*".
5875 ;; The code in v20.x called `ls' directly, so we need
5876 ;; to emulate what `ls' did in that case.
5881 ;; Keep the current buffer-file-coding-system.
5883 ;; Auto-saved file should be read with special coding.
5892 "Recover auto save files from a previous Emacs session.
5893 This command first displays a Dired buffer showing you the
5894 previous sessions that you could recover from.
5895 To choose one, move point to the proper line and then type C-c C-c.
5896 Then you'll be asked about a number of files to recover."
5906 directory-files-no-dot-files-regexp
5908 t)
5919 ;; Each line starts with a space
5920 ;; so that Font Lock mode won't highlight the first character.
5923 " To delete a session file, type \
5929 "Choose one saved session to recover auto-save files from.
5930 This command is used in the special Dired buffer created by
5933 ;; Get the name of the session file to recover from.
5935 files
5941 ;; Read in the auto-save-list file.
5944 ;; Loop thru the text of that file
5945 ;; and get out the names of the files to recover.
5949 ;; This is a pair of lines for a non-file-visiting buffer.
5950 ;; Get the auto-save file name and manufacture
5951 ;; a "visited file name" from that.
5954 ;; If there is no auto-save file name, the
5955 ;; auto-save-list file is probably corrupted.
5968 ;; This pair of lines is a file-visiting
5969 ;; buffer. Use the visited file name.
5979 ;; Ignore a file if its auto-save file does not exist now.
5983 ;; The file contains a pair of line for each auto-saved buffer.
5984 ;; The first line of the pair contains the visited file name
5985 ;; or is empty if the buffer was not visiting a file.
5986 ;; The second line is the auto-save file name.
5994 files
6000 "Kill BUFFER if confirmed."
6008 "Kill some buffers. Asks the user whether to kill each one of them.
6009 Non-interactively, if optional argument LIST is non-nil, it
6010 specifies the list of buffers to kill, asking for approval for each one."
6018 ; if we killed the base buffer.
6025 "Kill buffers whose name matches the specified REGEXP.
6026 Ignores buffers whose name starts with a space, unless optional
6027 prefix argument INTERNAL-TOO is non-nil. Asks before killing
6028 each buffer, unless NO-ASK is non-nil."
6037 \f
6039 "Adjust current buffer's auto save file name for current conditions.
6040 Also rename any existing auto save file, if it was made in this session."
6052 "Return file name to use for auto-saves of current buffer.
6053 Does not consider `auto-save-visited-file-name' as that variable is checked
6054 before calling this function. You can redefine this for customization.
6055 See also `auto-save-file-name-p'."
6063 result uniq)
6064 ;; Apply user-specified translations
6065 ;; to the file name.
6069 filename)
6079 filename))))
6084 ;; We truncate the file name to DOS 8+3 limits
6085 ;; before doing anything else, because the regexp
6086 ;; passed to string-match below cannot handle
6087 ;; extensions longer than 3 characters, multiple
6088 ;; dots, and other atrocities.
6093 fn)
6098 "#"
6101 ;; Make sure auto-save file names don't contain characters
6102 ;; invalid for the underlying filesystem.
6104 ;; Don't modify remote filenames
6107 result))))
6109 ;; Deal with buffers that don't have any associated files. (Mail
6110 ;; mode tends to create a good number of these.)
6114 file-name)
6115 ;; Restrict the characters used in the file name to those which
6116 ;; are known to be safe on all filesystems, url-encoding the
6117 ;; rest.
6118 ;; We do this on all platforms, because even if we are not
6119 ;; running on DOS/Windows, the current directory may be on a
6120 ;; mounted VFAT filesystem, such as a USB memory stick.
6124 ;; For multibyte characters, this will produce more than
6125 ;; 2 hex digits, so is not true URL encoding.
6129 ;; Generate the file name.
6135 ;; Try a few alternative directories, to get one we can
6136 ;; write it.
6142 ;; Don't modify remote filenames
6144 ;; The call to convert-standard-filename is in case
6145 ;; buffer-name includes characters not allowed by the
6146 ;; DOS/Windows filesystems. make-temp-file writes to the
6147 ;; file it creates, so we must fix the file name _before_
6148 ;; make-temp-file is called.
6150 fname))
6152 ;; make-temp-file creates the file,
6153 ;; but we don't want it to exist until we do an auto-save.
6157 file-name)))
6160 "Return non-nil if FILENAME can be yielded by `make-auto-save-file-name'.
6161 FILENAME should lack slashes. You can redefine this for customization."
6163 \f
6165 "Given a shell file name pattern WILDCARD, return an equivalent regexp.
6166 The generated regexp will match a filename only if the filename
6167 matches that wildcard according to shell rules. Only wildcards known
6168 by `sh' are supported."
6170 ;; Copy the initial run of non-special characters.
6173 ;; If no special characters, we're almost done.
6177 j)
6179 result
6200 ;; Found "[^". Insert a `\0' character
6201 ;; (which cannot happen in a filename)
6202 ;; into the character class, so that `^'
6203 ;; is not the first character after `[',
6204 ;; and thus non-special in a regexp.
6209 ;; I don't think `]' can appear in a
6210 ;; character class in a wildcard, but
6211 ;; let's be general here.
6218 i
6231 ;; Shell wildcards should match the entire filename,
6232 ;; not its part. Make the regexp say so.
6234 \f
6237 "Switches for `list-directory' to pass to `ls' for brief listing."
6243 "Switches for `list-directory' to pass to `ls' for verbose listing."
6248 "Expand wildcard pattern PATTERN.
6249 This returns a list of file names which match the pattern.
6250 Files are sorted in `string<' order.
6252 If PATTERN is written as an absolute file name,
6253 the values are absolute also.
6255 If PATTERN is written as a relative file name, it is interpreted
6256 relative to the current default directory, `default-directory'.
6257 The file names returned are normally also relative to the current
6258 default directory. However, if FULL is non-nil, they are absolute."
6262 ;; A list of all dirs that DIRPART specifies.
6263 ;; This can be more than one dir
6264 ;; if DIRPART contains wildcards.
6270 contents)
6275 ;; Filter out "." and ".."
6280 name))
6287 this-dir-contents)
6288 this-dir-contents)
6289 contents)))))
6290 contents)))
6292 ;; Let Tramp know that `file-expand-wildcards' does not need an advice.
6296 "Display a list of files in or matching DIRNAME, a la `ls'.
6297 DIRNAME is globbed by the shell if necessary.
6298 Prefix arg (second arg if noninteractive) means supply -l switch to `ls'.
6299 Actions controlled by variables `list-directory-brief-switches'
6300 and `list-directory-verbose-switches'."
6304 nil default-directory nil)
6305 pfx)))
6307 list-directory-brief-switches))
6308 buffer)
6320 ;; Finishing with-output-to-temp-buffer seems to clobber default-directory.
6328 "Quote characters special to the shell in PATTERN, leave wildcards alone.
6330 PATTERN is assumed to represent a file-name wildcard suitable for the
6331 underlying filesystem. For Unix and GNU/Linux, each character from the
6333 the parts of the pattern which don't include wildcard characters are
6334 quoted with double quotes.
6337 on Windows), so PATTERN can use them to quote wildcard characters that
6338 need to be passed verbatim to shell commands."
6342 ;; DOS/Windows don't allow `"' in file names. So if the
6343 ;; argument has quotes, we can safely assume it is already
6344 ;; quoted by the caller.
6346 ;; We quote [&()#$`'] in case their shell is a port of a
6347 ;; Unixy shell. We quote [,=+] because stock DOS and
6348 ;; Windows shells require that in some cases, such as
6349 ;; passing arguments to batch files that use positional
6350 ;; arguments like %1.
6352 pattern
6355 end)
6372 pattern))))
6379 "Program to get the amount of free space on a file system.
6380 We assume the output has the format of `df'.
6381 The value of this variable must be just a command name or file name;
6382 if you want to specify options, use `directory-free-space-args'.
6384 A value of nil disables this feature.
6386 If the function `file-system-info' is defined, it is always used in
6387 preference to the program given by this variable."
6393 "Options to use when running `directory-free-space-program'."
6398 "Return the amount of free space on directory DIR's file system.
6399 The return value is a string describing the amount of free
6400 space (normally, the number of free 1KB blocks).
6402 This function calls `file-system-info' if it is available, or
6403 invokes the program specified by `directory-free-space-program'
6404 and `directory-free-space-args'. If the system call or program
6405 is unsuccessful, or if DIR is a remote directory, this function
6406 returns nil."
6408 ;; Try to find the number of free blocks. Non-Posix systems don't
6409 ;; always have df, but might have an equivalent system call.
6418 ;; Avoid failure if the default directory does
6419 ;; not exist (Bug#2631, Bug#3911).
6423 nil t nil
6424 directory-free-space-args
6427 ;; Assume that the "available" column is before the
6428 ;; "capacity" column. Find the "%" and scan backward.
6432 "[[:space:]]+[^[:space:]]+%[^%]*$"
6439 ;; The following expression replaces `dired-move-to-filename-regexp'.
6443 ;; In some locales, month abbreviations are as short as 2 letters,
6444 ;; and they can be followed by ".".
6445 ;; In Breton, a month name can include a quote character.
6458 s "+"
6461 ;; Japanese MS-Windows ls-lisp has one-digit months, and
6462 ;; omits the Kanji characters after month and day-of-month.
6463 ;; On Mac OS X 10.3, the date format in East Asian locales is
6464 ;; day-of-month digits followed by month digits.
6470 ;; The "[0-9]" below requires the previous column to end in a digit.
6471 ;; This avoids recognizing `1 may 1997' as a date in the line:
6472 ;; -r--r--r-- 1 may 1997 1168 Oct 19 16:49 README
6474 ;; The "[BkKMGTPEZY]?" below supports "ls -alh" output.
6476 ;; For non-iso date formats, we add the ".*" in order to find
6477 ;; the last possible match. This avoids recognizing
6478 ;; `jservice 10 1024' as a date in the line:
6479 ;; drwxr-xr-x 3 jservice 10 1024 Jul 2 1997 esg-host
6481 ;; vc dired listings provide the state or blanks between file
6482 ;; permissions and date. The state is always surrounded by
6483 ;; parentheses:
6484 ;; -rw-r--r-- (modified) 2005-10-22 21:25 files.el
6485 ;; This is not supported yet.
6490 "Regular expression to match up to the file name in a directory listing.
6491 The default value is designed to recognize dates and times
6497 "Return non-nil if DIR contents a shell wildcard in the directory part.
6498 The return value is a cons (DIR . WILDCARDS); DIR is the
6499 `default-directory' in the Dired buffer, and WILDCARDS are the wildcards.
6501 Valid wildcards are '*', '?', '[abc]' and '[a-z]'."
6504 ls-lisp-support-shell-wildcards)
6508 wildcards wildcards wildcards)))
6516 ;; The following overshoots by one line for an empty
6517 ;; directory listed with "--dired", but without "-a"
6518 ;; switch, where the ls output contains a
6519 ;; "//DIRED-OPTIONS//" line, but no "//DIRED//" line.
6520 ;; We take care of that case later.
6528 error-lines)
6529 ;; Find all the lines that are error messages,
6530 ;; and record the bounds of each one.
6537 ;; Now read the numeric positions of file names.
6544 error-lines))
6547 error-lines)))
6549 ;; End is followed by \n or by " -> ".
6551 ;; It seems that we can't trust ls's output as to
6552 ;; byte positions of filenames.
6558 ;; Take care of the case where the ls output contains a
6559 ;; "//DIRED-OPTIONS//"-line, but no "//DIRED//"-line
6560 ;; and we went one line too far back (see above).
6565 ;; insert-directory
6566 ;; - must insert _exactly_one_line_ describing FILE if WILDCARD and
6567 ;; FULL-DIRECTORY-P is nil.
6568 ;; The single line of output must display FILE's name as it was
6569 ;; given, namely, an absolute path name.
6570 ;; - must insert exactly one line for each file if WILDCARD or
6571 ;; FULL-DIRECTORY-P is t, plus one optional "total" line
6572 ;; before the file lines, plus optional text after the file lines.
6573 ;; Lines are delimited by "\n", so filenames containing "\n" are not
6574 ;; allowed.
6575 ;; File lines should display the basename.
6576 ;; - must be consistent with
6577 ;; - functions dired-move-to-filename, (these two define what a file line is)
6578 ;; dired-move-to-end-of-filename,
6579 ;; dired-between-files, (shortcut for (not (dired-move-to-filename)))
6580 ;; dired-insert-headerline
6581 ;; dired-after-subdir-garbage (defines what a "total" line is)
6582 ;; - variable dired-subdir-regexp
6583 ;; - may be passed "--dired" as the first argument in SWITCHES.
6584 ;; Filename handlers might have to remove this switch if their
6585 ;; "ls" command does not support it.
6587 "Insert directory listing for FILE, formatted according to SWITCHES.
6588 Leaves point after the inserted text.
6589 SWITCHES may be a string of options, or a list of strings
6590 representing individual options.
6591 Optional third arg WILDCARD means treat FILE as shell wildcard.
6592 Optional fourth arg FULL-DIRECTORY-P means file is a directory and
6593 switches do not contain `d', so that a full listing is expected.
6595 This works by running a directory listing program
6596 whose name is in the variable `insert-directory-program'.
6597 If WILDCARD, it also runs the shell specified by `shell-file-name'.
6599 When SWITCHES contains the long `--dired' option, this function
6600 treats it specially, for the sake of dired. However, the
6601 normally equivalent short `-D' option is just passed on to
6602 `insert-directory-program', as any other option."
6603 ;; We need the directory in order to find the right handler.
6608 wildcard full-directory-p)
6611 ;; Read the actual directory using `insert-directory-program'.
6612 ;; RESULT gets the status code.
6614 ;; putting text property `dired-filename, decode one
6615 ;; bunch by one to preserve that property.
6617 ;; This is to control encoding the arguments in call-process.
6621 default-file-name-coding-system))))
6624 ;; If the wildcard is just in the file part, then run ls in
6625 ;; the directory part of the file pattern using the last
6626 ;; component as argument. Otherwise, run ls in the longest
6627 ;; subdirectory of the directory part free of wildcards; use
6628 ;; the remaining of the file pattern as argument.
6637 ;; NB since switches is passed to the shell, be
6638 ;; careful of malicious values, eg "-l;reboot".
6639 ;; See eg dired-safe-switches-p.
6641 shell-file-name nil t nil
6642 shell-command-switch
6644 ""
6646 insert-directory-program
6647 " -d "
6649 switches
6651 " -- "
6652 ;; Quote some characters that have
6653 ;; special meanings in shells; but
6654 ;; don't quote the wildcards--we want
6655 ;; them to be special. We also
6656 ;; currently don't quote the quoting
6657 ;; characters in case people want to
6658 ;; use them explicitly to quote
6659 ;; wildcard characters.
6661 ;; SunOS 4.1.3, SVr4 and others need the "." to list the
6662 ;; directory if FILE is a symbolic link.
6670 insert-directory-program nil t nil
6674 ;; Split the switches at any spaces so we can
6675 ;; pass separate options as separate args.
6677 ;; Avoid lossage if FILE starts with `-'.
6684 ;; (concat (file-name-as-directory file) ".")
6685 file
6686 file))))))))
6688 ;; If we got "//DIRED//" in the output, it means we got a real
6689 ;; directory listing, even if `ls' returned nonzero.
6690 ;; So ignore any errors.
6703 ;; The first time ls returns an error,
6704 ;; find the version numbers of ls,
6705 ;; and set insert-directory-ls-version
6706 ;; to > if it is more than 5.2.1, < if it is less, nil if it
6707 ;; is equal or if the info cannot be obtained.
6708 ;; (That can mean it isn't GNU ls.)
6718 comparison)
6734 ;; For GNU ls versions 5.2.2 and up, ignore minor errors.
6738 ;; If `insert-directory-program' failed, signal an error.
6740 ;; Delete the error message it may have output.
6742 ;; On non-Posix systems, we cannot open a directory, so
6743 ;; don't even try, because that will always result in
6744 ;; the ubiquitous "Access denied". Instead, show the
6745 ;; command line so the user can try to guess what went wrong.
6750 insert-directory-program
6752 file result)
6753 ;; Unix. Access the file to get a suitable error.
6757 ;; Now decode what read if necessary.
6759 file-name-coding-system
6760 default-file-name-coding-system
6762 coding-no-eol
6763 val pos)
6767 ;; If no coding system is specified or detection is
6768 ;; requested, detect the coding.
6782 ;; Force no eol conversion on a file name, so
6783 ;; that CR is preserved.
6791 ;; Try to insert the amount of free space.
6794 ;; First find the line to put it on.
6798 ;; Replace "total" with "used", to avoid confusion.
6804 "Convert `ls --dired' file name position value POS to a buffer position.
6805 File name position values returned in ls --dired output
6806 count only stdout; they don't count the error messages sent to stderr.
6807 So this function converts to them to real buffer positions.
6808 ERROR-LINES is a list of buffer positions of error message lines,
6809 of the form (START END)."
6813 pos)
6817 "Insert directory listing for FILE, formatted according to SWITCHES.
6819 Like `insert-directory', but if FILE does not exist, it inserts a
6820 message to that effect instead of signaling an error."
6823 ;; Simulate the message printed by `ls'.
6827 "Functions to call with no arguments to query about killing Emacs.
6828 If any of these functions returns nil, killing Emacs is canceled.
6829 `save-buffers-kill-emacs' calls these functions, but `kill-emacs',
6830 the low level primitive, does not. See also `kill-emacs-hook'."
6836 "How to ask for confirmation when leaving Emacs.
6837 If nil, the default, don't ask at all. If the value is non-nil, it should
6838 be a predicate function; for example `yes-or-no-p'."
6847 "Non-nil if Emacs should confirm killing processes on exit.
6848 If this variable is nil, the value of
6849 `process-query-on-exit-flag' is ignored. Otherwise, if there are
6850 processes with a non-nil `process-query-on-exit-flag', Emacs will
6851 prompt the user before killing them."
6857 "Offer to save each buffer, then kill this Emacs process.
6858 With prefix ARG, silently save all file-visiting buffers without asking.
6859 If there are active processes where `process-query-on-exit-flag'
6860 returns non-nil and `confirm-kill-processes' is non-nil,
6861 asks whether processes should be killed.
6862 Runs the members of `kill-emacs-query-functions' in turn and stops
6863 if any returns nil. If `confirm-kill-emacs' is non-nil, calls it."
6865 ;; Don't use save-some-buffers-default-predicate, because we want
6866 ;; to ask about all the buffers before killing Emacs.
6877 ;; process-list is not defined on MSDOS.
6880 active)
6898 ;; Query the user for other things, perhaps.
6905 "Offer to save each buffer, then kill the current connection.
6906 If the current frame has no client, kill Emacs itself using
6907 `save-buffers-kill-emacs'.
6909 With prefix ARG, silently save all file-visiting buffers, then kill.
6911 If emacsclient was started with a list of filenames to edit, then
6912 only these files will be asked to be saved."
6917 \f
6918 ;; We use /: as a prefix to "quote" a file name
6919 ;; so that magic file name handlers will not apply to it.
6923 file-name-handler-alist))
6925 ;; We depend on being the last handler on the list,
6926 ;; so that anything else which does need handling
6927 ;; has been handled already.
6928 ;; So it is safe for us to inhibit *all* magic file name handlers.
6933 ;; Some operations respect file name handlers in
6934 ;; `default-directory'. Because core function like
6935 ;; `call-process' don't care about file name handlers in
6936 ;; `default-directory', we here have to resolve the
6937 ;; directory into a local one. For `process-file',
6938 ;; `start-file-process', and `shell-command', this fixes
6939 ;; Bug#25949.
6941 shell-command))
6945 default-directory))
6946 ;; Get a list of the indices of the args which are file names.
6949 ;; The first six are special because they
6950 ;; return a file name. We want to include the /:
6951 ;; in the return value.
6952 ;; So just avoid stripping it in the first place.
6959 ;; `identity' means just return the first arg
6960 ;; not stripped of its quoting.
6962 ;; `add' means add "/:" to the result.
6965 ;; `unquote-then-quote' means set buffer-file-name
6966 ;; temporarily to unquoted filename.
6968 ;; List the arguments which are filenames.
6976 ;; For all other operations, treat the first argument only
6977 ;; as the file name.
6979 method
6980 ;; Copy ARGUMENTS so we can replace elements in it.
6984 ;; Strip off the /: from the file names that have it.
6992 "/"
6998 (`insert-file-contents
7004 (`unquote-then-quote
7005 ;; We can't use `cl-letf' with `(buffer-local-value)' here
7006 ;; because it wouldn't work during bootstrapping.
7008 ;; `unquote-then-quote' is only used for the
7009 ;; `verify-visited-file-modtime' action, which takes a buffer
7010 ;; as only optional argument.
7013 ;; Make sure to hide the temporary buffer change from the
7014 ;; underlying operation.
7022 If NAME is a remote file name, check the local part of NAME."
7027 If NAME is a remote file name, the local part of NAME is quoted.
7028 If NAME is already a quoted file name, NAME is returned unchanged."
7030 name
7035 If NAME is a remote file name, the local part of NAME is unquoted."
7041 \f
7042 ;; Symbolic modes and read-file-modes.
7045 "Convert CHAR to a numeric bit-mask for extracting mode bits.
7046 CHAR is in [ugoa] and represents the category of users (Owner, Group,
7047 Others, or All) for whom to produce the mask.
7048 The bit-mask that is returned extracts from mode bits the access rights
7049 for the specified category of users."
7057 "Convert CHAR to a numeric value of mode bits.
7058 CHAR is in [rwxXstugo] and represents symbolic access permissions.
7059 If CHAR is in [Xugo], the value is taken from FROM (or 0 if omitted)."
7066 ;; Rights relative to the previous file modes.
7077 "Convert a symbolic mode string specification to an equivalent number.
7079 WHO-MASK is the bit-mask specifying the category of users to which to
7080 apply the access permissions. See `file-modes-char-to-who'.
7081 FROM (or 0 if nil) gives the mode bits on which to base permissions if
7082 RIGHTS request to add, remove, or set permissions based on existing ones,
7089 char-right)
7096 num-rights
7100 op char-right)))
7101 num-rights))
7104 "Convert symbolic file modes to numeric file modes.
7105 MODES is the string to convert, it should match
7107 See Info node `(coreutils)File permissions' for more information on this
7108 notation.
7109 FROM (or 0 if nil) gives the mode bits on which to base permissions if
7110 MODES request to add, remove, or set permissions based on existing ones,
7124 num-who num-modes)
7127 num-modes)))
7130 "Read file modes in octal or symbolic notation and return its numeric value.
7132 ORIG-FILE is the name of a file on whose mode bits to base returned
7133 permissions if what user types requests to add, remove, or set permissions
7149 nil nil default)))
7158 ;; Trashcan handling.
7160 "Directory for `move-file-to-trash' to move files and directories to.
7161 This directory is only used when the function `system-move-file-to-trash'
7162 is not defined.
7163 Relative paths are interpreted relative to `default-directory'.
7164 If the value is nil, Emacs uses a freedesktop.org-style trashcan."
7174 "Move the file (or directory) named FILENAME to the trash.
7175 When `delete-by-moving-to-trash' is non-nil, this function is
7176 called by `delete-file' and `delete-directory' instead of
7177 deleting files outright.
7179 If the function `system-move-file-to-trash' is defined, call it
7180 with FILENAME as an argument.
7181 Otherwise, if `trash-directory' is non-nil, move FILENAME to that
7182 directory.
7183 Otherwise, trash FILENAME using the freedesktop.org conventions,
7184 like the GNOME, KDE and XFCE desktop environments. Emacs only
7188 ;; If `trash-directory' is non-nil, move the file there.
7193 ;; We can't trash a parent directory of trash-directory.
7196 trash-dir filename))
7199 ;; Ensure that the trashed file-name is unique.
7206 ;; If `system-move-file-to-trash' is defined, use it.
7209 ;; Otherwise, use the freedesktop.org method, as specified at
7210 ;; http://freedesktop.org/wiki/Specifications/trash-spec
7221 ;; Check if we have permissions to delete.
7225 ;; The trashed file cannot be the trash dir or its parent.
7228 trash-files-dir filename))
7231 trash-info-dir filename))
7233 ;; Ensure that the trash directory exists; otherwise, create it.
7240 ;; Try to move to trash with .trashinfo undo information
7245 ;; Perform url-encoding on FN. For compatibility with
7246 ;; other programs (e.g. XFCE Thunar), allow literal "/"
7247 ;; for path separators.
7252 ?n ?o ?p ?q ?r ?s ?t ?u ?v ?w ?x ?y ?z ?A
7253 ?B ?C ?D ?E ?F ?G ?H ?I ?J ?K ?L ?M ?N ?O
7266 fn))
7271 ;; Make a .trashinfo file. Use O_EXCL, as per trash-spec 1.0.
7275 trash-info-dir)))
7279 ;; Uniquify new-fn. Some file managers do not
7280 ;; like Emacs-style backup file names. E.g.:
7281 ;; https://bugs.kde.org/170956
7287 ;; Finally, try to move the file to the trashcan.
7293 "The type field in ATTRIBUTES returned by `file-attributes'.
7294 The value is either t for directory, string (name linked to) for
7295 symbolic link, or nil."
7299 "Return the number of links in ATTRIBUTES returned by `file-attributes'."
7303 "The UID field in ATTRIBUTES returned by `file-attributes'.
7304 This is either a string or a number. If a string value cannot be
7305 looked up, a numeric value, either an integer or a float, is
7306 returned."
7310 "The GID field in ATTRIBUTES returned by `file-attributes'.
7311 This is either a string or a number. If a string value cannot be
7312 looked up, a numeric value, either an integer or a float, is
7313 returned."
7317 "The last access time in ATTRIBUTES returned by `file-attributes'.
7318 This a list of integers (HIGH LOW USEC PSEC) in the same style
7319 as (current-time)."
7323 "The modification time in ATTRIBUTES returned by `file-attributes'.
7324 This is the time of the last change to the file's contents, and
7325 is a list of integers (HIGH LOW USEC PSEC) in the same style
7326 as (current-time)."
7330 "The status modification time in ATTRIBUTES returned by `file-attributes'.
7331 This is the time of last change to the file's attributes: owner
7332 and group, access mode bits, etc, and is a list of integers (HIGH
7333 LOW USEC PSEC) in the same style as (current-time)."
7337 "The size (in bytes) in ATTRIBUTES returned by `file-attributes'.
7338 This is a floating point number if the size is too large for an integer."
7342 "The file modes in ATTRIBUTES returned by `file-attributes'.
7343 This is a string of ten letters or dashes as in ls -l."
7347 "The inode number in ATTRIBUTES returned by `file-attributes'.
7348 If it is larger than what an Emacs integer can hold, this is of
7349 the form (HIGH . LOW): first the high bits, then the low 16 bits.
7350 If even HIGH is too large for an Emacs integer, this is instead
7351 of the form (HIGH MIDDLE . LOW): first the high bits, then the
7352 middle 24 bits, and finally the low 16 bits."
7356 "The file system device number in ATTRIBUTES returned by `file-attributes'.
7357 If it is larger than what an Emacs integer can hold, this is of
7358 the form (HIGH . LOW): first the high bits, then the low 16 bits.
7359 If even HIGH is too large for an Emacs integer, this is instead
7360 of the form (HIGH MIDDLE . LOW): first the high bits, then the
7361 middle 24 bits, and finally the low 16 bits."
7365 "Return a sublist of ATTRIBUTES returned by `file-attributes'.
7366 ATTR-NAMES are symbols with the selected attribute names.
7368 Valid attribute names are: type, link-number, user-id, group-id,
7369 access-time, modification-time, status-change-time, size, modes,
7370 inode-number and device-number."
7372 modification-time status-change-time
7373 size modes inode-number device-number))
7374 result)
7380 attributes)
7381 result)
7384 \f
7409 ;;; files.el ends here