| blob | da1e7128a9420f0f2bbc143344b1cb12e29bb084 |
1 ;;; files.el --- file input and output commands for Emacs
3 ;; Copyright (C) 1985,86,87,92,93,94,95,96,97,98,99,2000,01,02,03,2004
4 ;;; Free Software Foundation, Inc.
6 ;; Maintainer: FSF
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
13 ;; any later version.
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
25 ;;; Commentary:
27 ;; Defines most of Emacs's file- and directory-handling functions,
28 ;; including basic file visiting, backup generation, link handling,
29 ;; ITS-id version control, load- and write-hook handling, and the like.
31 ;;; Code:
34 "Backups of edited data files."
38 "Finding files."
43 "*Non-nil means delete auto-save file when a buffer is saved or killed.
45 Note that the auto-save file will not be deleted if the buffer is killed
46 when it has unsaved changes."
51 nil
52 "*Alist of abbreviations for file directories.
53 A list of elements of the form (FROM . TO), each meaning to replace
54 FROM with TO when it appears in a directory name. This replacement is
55 done when setting up the default directory of a newly visited file.
56 *Every* FROM string should start with `^'.
58 Do not use `~' in the TO strings.
59 They should be ordinary absolute directory names.
61 Use this feature when you have directories which you normally refer to
62 via absolute symbolic links. Make TO the name of the link, and FROM
63 the name it is linked to."
71 ;; Turn off backup files on VMS since it has version numbers.
73 "*Non-nil means make a backup of a file the first time it is saved.
74 This can be done by renaming the file or by copying.
76 Renaming means that Emacs renames the existing file so that it is a
77 backup file, then writes the buffer into a new file. Any other names
78 that the old file had will now refer to the backup file. The new file
79 is owned by you and its group is defaulted.
81 Copying means that Emacs copies the existing file into the backup
82 file, then writes the buffer on top of the existing file. Any other
83 names that the old file had will now refer to the new (edited) file.
84 The file's owner and group are unchanged.
86 The choice of renaming or copying is controlled by the variables
87 `backup-by-copying', `backup-by-copying-when-linked',
88 `backup-by-copying-when-mismatch' and
89 `backup-by-copying-when-privileged-mismatch'. See also `backup-inhibited'."
93 ;; Do this so that local variables based on the file name
94 ;; are not overridden by the major mode.
96 "Non-nil means don't make a backup, regardless of the other parameters.
97 This variable is intended for use by making it local to a buffer.
102 "*Non-nil means always use copying to create backup files.
103 See documentation of variable `make-backup-files'."
108 "*Non-nil means use copying to create backups for files with multiple names.
109 This causes the alternate names to refer to the latest version as edited.
110 This variable is relevant only if `backup-by-copying' is nil."
115 "*Non-nil means create backups by copying if this preserves owner or group.
116 Renaming may still be used (subject to control of other variables)
117 when it would not result in changing the owner or group of the file;
118 that is, for files which are owned by you and whose group matches
119 the default for a new file created there by you.
120 This variable is relevant only if `backup-by-copying' is nil."
125 "*Non-nil means create backups by copying to preserve a privileged owner.
126 Renaming may still be used (subject to control of other variables)
127 when it would not result in changing the owner of the file or if the owner
128 has a user id greater than the value of this variable. This is useful
129 when low-numbered uid's are used for special system users (such as root)
130 that must maintain ownership of certain files.
131 This variable is relevant only if `backup-by-copying' and
132 `backup-by-copying-when-mismatch' are nil."
137 "Predicate that looks at a file name and decides whether to make backups.
141 "*Non-nil in a buffer means always offer to save buffer on exit.
142 Do so even if the buffer is not visiting a file.
143 Automatically local in all buffers."
149 "*Non-nil means find a file under alternative names, in existing buffers.
150 This means if any existing buffer is visiting the file you want
151 under another name, you get the existing buffer instead of a new buffer."
156 "*Non-nil means visit a file under its truename.
157 The truename of a file is found by chasing all links
158 both at the file level and at the levels of the containing directories."
163 nil
164 "*Specify which files should be reverted without query.
165 The value is a list of regular expressions.
166 If the file name matches one of these regular expressions,
167 then `revert-buffer' reverts the file without querying
168 if the file has changed on disk and you have not edited the buffer."
173 "The device number and file number of the file visited in the current buffer.
174 The value is a list of the form (FILENUM DEVNUM).
175 This pair of numbers uniquely identifies the file.
195 "The directory for writing temporary files."
201 "The directory for writing small temporary files.
202 If non-nil, this directory is used instead of `temporary-file-directory'
203 by programs that create small temporary files. This is for systems that
204 have fast storage with limited space, such as a RAM disk."
208 ;; The system null device. (Should reference NULL_DEVICE from C.)
225 "*Non-nil means protect against I/O errors while saving files.
226 Some modes set this non-nil in particular buffers.
228 This feature works by writing the new contents into a temporary file
229 and then renaming the temporary file to replace the original.
230 In this way, any I/O error in writing leaves the original untouched,
231 and there is never any instant where the file is nonexistent.
233 Note that this feature forces backups to be made by copying.
234 Yet, at the same time, saving a precious file
235 breaks any hard links between it and other files."
240 "*Control use of version numbers for backup files.
241 t means make numeric backup versions unconditionally.
242 nil means make them for files that have some already.
243 `never' means do not make them."
251 "*When cleaning directory, number of versions to keep."
257 "*If t, delete excess backup versions silently.
258 If nil, ask confirmation. Any other value prevents any trimming."
265 "*Number of oldest versions to keep when a new numbered backup is made."
270 "*Number of newest versions to keep when a new numbered backup is made.
271 Includes the new backup. Must be > 0"
276 "*Value of t says silently ensure a file ends in a newline when it is saved.
277 Non-nil but not t says ask user whether to add a newline when there isn't one.
278 nil means don't add newlines."
285 "*Non-nil says by default do auto-saving of every file-visiting buffer."
290 "*Non-nil says auto-save a buffer in the file it is visiting, when practical.
291 Normally auto-save files are written under other names."
297 ;; Don't put "\\2" inside expand-file-name, since it will be
298 ;; transformed to "/2" on DOS/Windows.
300 "*Transforms to apply to buffer file name before making auto-save file name.
301 Each transform is a list (REGEXP REPLACEMENT UNIQUIFY):
302 REGEXP is a regular expression to match against the file name.
303 If it matches, `replace-match' is used to replace the
304 matching part with REPLACEMENT.
305 If the optional element UNIQUIFY is non-nil, the auto-save file name is
306 constructed by taking the directory part of the replaced file-name,
307 concatenated with the buffer file name with all directory separators
308 changed to `!' to prevent clashes. This will not work
309 correctly if your filesystem truncates the resulting name.
311 All the transforms in the list are tried, in the order they are listed.
312 When one transform applies, its result is final;
313 no further transforms are tried.
315 The default value is set up to put the auto-save file into the
316 temporary directory (see the variable `temporary-file-directory') for
317 editing a remote file.
319 On MS-DOS filesystems without long names this variable is always
320 ignored."
327 "*Non-nil means save word abbrevs too when files are saved.
328 If `silently', don't ask the user before saving."
333 "*Non-nil means allow `find-file' to visit directories.
334 To visit the directory, `find-file' runs `find-directory-functions'."
339 "*List of functions to try in sequence to visit a directory.
340 Each function is called with the directory name as the sole argument
341 and should return either a buffer or nil."
345 ;;;It is not useful to make this a local variable.
346 ;;;(put 'find-file-not-found-hooks 'permanent-local t)
348 "List of functions to be called for `find-file' on nonexistent file.
349 These functions are called as soon as the error is detected.
350 Variable `buffer-file-name' is already set up.
356 ;;;It is not useful to make this a local variable.
357 ;;;(put 'find-file-hooks 'permanent-local t)
359 "List of functions to be called after a buffer is loaded from a file.
360 The buffer's local variables (if any) will have been processed before the
361 functions are called."
370 "List of functions to be called before writing out a buffer to a file.
371 If one of them returns non-nil, the file is considered already written
372 and the rest are not called.
373 These hooks are considered to pertain to the visited file.
374 So any buffer-local binding of this variable is discarded if you change
376 change the major mode.
378 This hook is not run if any of the functions in
379 `write-contents-functions' returns non-nil. Both hooks pertain
380 to how to save a buffer to file, for instance, choosing a suitable
381 coding system and setting mode bits. (See Info
382 node `(elisp)Saving Buffers'.) To perform various checks or
394 "List of functions to be called before writing out a buffer to a file.
395 If one of them returns non-nil, the file is considered already written
396 and the rest are not called and neither are the functions in
397 `write-file-functions'.
399 This variable is meant to be used for hooks that pertain to the
400 buffer's contents, not to the particular visited file; thus,
401 `set-visited-file-name' does not clear this variable; but changing the
402 major mode does clear it.
404 For hooks that _do_ pertain to the particular visited file, use
405 `write-file-functions'. Both this variable and
406 `write-file-functions' relate to how a buffer is saved to file.
407 To perform various checks or updates before the buffer is saved,
414 "*Control use of local variables in files you visit.
415 The value can be t, nil or something else.
416 A value of t means file local variables specifications are obeyed;
417 nil means they are ignored; anything else means query.
418 This variable also controls use of major modes specified in
419 a -*- line.
422 always obeys file local variable specifications and the -*- line,
423 and ignores this variable."
430 "Like `enable-local-variables' but meant for buffer-local bindings.
431 The meaningful values are nil and non-nil. The default is non-nil.
432 If a major mode sets this to nil, buffer-locally, then any local
433 variables list in the file will be ignored.
435 This variable does not affect the use of major modes
440 The value can be t, nil or something else.
441 A value of t means obey `eval' variables;
442 nil means ignore them; anything else means query.
445 and ignores this variable."
451 ;; Avoid losing in versions where CLASH_DETECTION is disabled.
460 "*Non-nil means buffers visiting files read-only do so in view mode.
461 In fact, this means that all read-only buffers normally have
462 View mode enabled, including buffers that are read-only because
463 you visit a file you cannot alter, and buffers you make read-only
470 "Provides support for ange-ftp host name completion.
471 Runs the usual ange-ftp hook, but only for completion operations."
472 ;; Having this here avoids the need to load ange-ftp when it's not
473 ;; really in use.
479 inhibit-file-name-handlers)))
484 "Convert a standard file's name to something suitable for the current OS.
485 This means to guarantee valid names and perhaps to canonicalize
486 certain patterns.
488 This function's standard definition is trivial; it just returns
489 the argument. However, on Windows and DOS, replace invalid
490 characters. On DOS, make sure to obey the 8.3 limitations. On
491 Windows, turn Cygwin names into native names, and also turn
492 slashes into backslashes if the shell requires it (see
493 `w32-shell-dos-semantics')."
494 filename)
497 "Read directory name, prompting with PROMPT and completing in directory DIR.
498 Value is not expanded---you must call `expand-file-name' yourself.
499 Default name to DEFAULT-DIRNAME if user exits with the same
500 non-empty string that was inserted by this function.
501 (If DEFAULT-DIRNAME is omitted, the current buffer's directory is used,
502 except that if INITIAL is specified, that combined with DIR is used.)
503 If the user exits with an empty minibuffer, this function returns
504 an empty string. (This can only happen if the user erased the
505 pre-inserted contents or if `insert-default-directory' is nil.)
506 Fourth arg MUSTMATCH non-nil means require existing directory's name.
507 Non-nil and non-t means also require confirmation after completion.
508 Fifth arg INITIAL specifies text to start with.
509 DIR should be an absolute directory name. It defaults to
510 the value of `default-directory'."
519 \f
521 "Show the current default directory."
526 "Value of the CDPATH environment variable, as a list.
530 "Explode a search path into a list of directory names.
531 Directories are separated by occurrences of `path-separator'
532 \(which is colon in GNU and GNU-like systems)."
533 ;; We could use split-string here.
541 nil
546 cd-list)))
549 "Change current directory to given absolute file name DIR."
550 ;; Put the name into directory syntax now,
551 ;; because otherwise expand-file-name may give some bad results.
564 "Make DIR become the current buffer's default directory.
565 If your environment includes a `CDPATH' variable, try each one of
566 that list of directories (separated by occurrences of
567 `path-separator') when resolving a relative directory name.
568 The path separator is colon in GNU and GNU-like systems."
571 default-directory default-directory
587 cd-path)
588 nil))
592 "Load the Lisp file named FILE."
593 ;; This is a case where .elc makes a lot of sense.
600 "Search for FILENAME through PATH.
601 If SUFFIXES is non-nil, it should be a list of suffixes to append to
603 If non-nil, PREDICATE is used instead of `file-readable-p'.
604 PREDICATE can also be an integer to pass to the `access' system call,
605 in which case file-name handlers are ignored. This usage is deprecated.
607 For compatibility, PREDICATE can also be one of the symbols
608 `executable', `readable', `writable', or `exists', or a list of
609 one or more of those symbols."
620 "Do completion for file names passed to `locate-file'.
621 PATH-AND-SUFFIXES is a pair of lists (DIRECTORIES . SUFFIXES)."
644 "Load the library named LIBRARY.
645 This is an interface to the function `load'."
648 'locate-file-completion
653 "Test whether FILE specifies a location on a remote system.
654 Return an identification of the system if the location is indeed
655 remote. The identification of the system may comprise a method
656 to access the system and its hostname, amongst other things.
663 nil)))
666 "Copy the file FILE into a temporary file on this machine.
667 Returns the name of the local copy, or nil, if FILE is directly
668 accessible."
669 ;; This formerly had an optional BUFFER argument that wasn't used by
670 ;; anything.
674 nil)))
677 "Return the truename of FILENAME, which should be absolute.
678 The truename of a file name is found by chasing symbolic links
679 both at the level of the file and at the level of the directories
680 containing it, until no links are left at any level.
682 \(fn FILENAME)"
683 ;; COUNTER and PREV-DIRS are only used in recursive calls.
684 ;; COUNTER can be a cons cell whose car is the count of how many
685 ;; more links to chase before getting an error.
686 ;; PREV-DIRS can be a cons cell whose car is an alist
687 ;; of truenames we've just recently computed.
701 ;; For speed, remove the ange-ftp completion handler from the list.
702 ;; We know it's not needed here.
703 ;; For even more speed, do this only on the outermost call.
710 ;; andrewi@harlequin.co.uk - none of the following code (except for
711 ;; invoking the file-name handler) currently applies on Windows
712 ;; (ie. there are no native symlinks), but there is an issue with
713 ;; case differences being ignored by the OS, and short "8.3 DOS"
714 ;; name aliases existing for all files. (The short names are not
715 ;; reported by directory-files, but can be used to refer to files.)
716 ;; It seems appropriate for file-truename to resolve these issues in
717 ;; the most natural way, which on Windows is to call the function
718 ;; `w32-long-file-name' - this returns the exact name of a file as
719 ;; it is stored on disk (expanding short name aliases with the full
720 ;; name in the process).
723 ;; For file name that has a special handler, call handler.
724 ;; This is so that ange-ftp can save time by doing a no-op.
727 ;; If filename contains a wildcard, newname will be the old name.
729 ;; If filename exists, use the long name
733 ;; If this file directly leads to a link, process that iteratively
734 ;; so that we don't use lots of stack.
740 ;; For file name that has a special handler, call handler.
741 ;; This is so that ange-ftp can save time by doing a no-op.
744 done t)
746 target dirfile)
747 ;; Get the truename of the directory.
749 ;; If these are equal, we have the (or a) root directory.
751 ;; If this is the same dir we last got the truename for,
752 ;; save time--don't recalculate.
762 done t)
765 done t)
766 ;; Put it back on the file name.
768 ;; Is the file name the name of a link?
771 ;; Yes => chase that link, then start all over
772 ;; since the link may point to a directory name that uses links.
773 ;; We can't safely use expand-file-name here
774 ;; since target might look like foo/../bar where foo
775 ;; is itself a link. Instead, we handle . and .. above.
778 target
780 done nil)
781 ;; No, we are done!
783 filename))
786 "Chase links in FILENAME until a name that is not a link.
787 Unlike `file-truename', this does not check whether a parent
788 directory name is a symbolic link.
789 If the optional argument LIMIT is a number,
790 it means chase no more than that many links and then stop."
798 ;; In the context of a link, `//' doesn't mean what Emacs thinks.
801 ;; Handle `..' by hand, since it needs to work in the
802 ;; target of any directory symlink.
803 ;; This code is not quite complete; it does not handle
804 ;; embedded .. in some cases such as ./../foo and foo/bar/../../../lose.
808 ;; Chase links in the default dir of the symlink.
812 ;; Now find the parent of that dir.
816 newname))
819 "Change the encoding of FILE's name from CODING to NEW-CODING.
820 The value is a new name of FILE.
821 Signals a `file-already-exists' error if a file of the new name
822 already exists unless optional third argument OK-IF-ALREADY-EXISTS
823 is non-nil. A number as third arg means request confirmation if
824 the new name already exists. This is what happens in interactive
825 use with M-x."
828 default-file-name-coding-system))
830 from-coding to-coding)
832 ;; We provide the default coding only when it seems that
833 ;; the filename is correctly decoded by the default
834 ;; coding.
840 filename default-coding)
841 default-coding))
845 ;; We provide the default coding only when a user is going to
846 ;; change the encoding not from the default coding.
850 filename from-coding)))
853 filename from-coding default-coding)
854 default-coding)))
858 default-file-name-coding-system))
859 ;; FILE should have been decoded by DEFAULT-CODING.
863 ;; Suppress further encoding.
868 newname))
869 \f
871 "Select buffer BUFFER in another window.
872 If BUFFER does not identify an existing buffer, then this function
873 creates a buffer with that name.
875 When called from Lisp, BUFFER can be a buffer, a string \(a buffer name),
876 or nil. If BUFFER is nil, then this function chooses a buffer
877 using `other-buffer'.
878 Optional second arg NORECORD non-nil means
879 do not put this buffer at the front of the list of recently selected ones.
880 This function returns the buffer it switched to.
882 This uses the function `display-buffer' as a subroutine; see its
883 documentation for additional customization information."
886 ;; Don't let these interfere.
887 same-window-buffer-names same-window-regexps)
891 "Switch to buffer BUFFER in another frame.
892 Optional second arg NORECORD non-nil means
893 do not put this buffer at the front of the list of recently selected ones.
895 This uses the function `display-buffer' as a subroutine; see its
896 documentation for additional customization information."
899 same-window-buffer-names same-window-regexps)
913 ;; Clear out this hook so it does not interfere
914 ;; with any recursive minibuffer usage.
917 minibuffer-setup-hook))
920 t))
923 "Edit file FILENAME.
924 Switch to a buffer visiting file FILENAME,
925 creating one if none already exists.
926 Interactively, the default if you just type RET is the current directory,
927 but the visited file name is available through the minibuffer history:
928 type M-n to pull it into the minibuffer.
930 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
931 expand wildcards (if any) and visit multiple files. You can
932 suppress wildcard expansion by setting `find-file-wildcards'.
934 To visit a file without any kind of conversion and without
944 "Edit file FILENAME, in another window.
945 May create a new window, or reuse an existing one.
946 See the function `display-buffer'.
948 Interactively, the default if you just type RET is the current directory,
949 but the visited file name is available through the minibuffer history:
950 type M-n to pull it into the minibuffer.
952 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
953 expand wildcards (if any) and visit multiple files."
964 "Edit file FILENAME, in another frame.
965 May create a new frame, or reuse an existing one.
966 See the function `display-buffer'.
968 Interactively, the default if you just type RET is the current directory,
969 but the visited file name is available through the minibuffer history:
970 type M-n to pull it into the minibuffer.
972 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
973 expand wildcards (if any) and visit multiple files."
984 "Edit file FILENAME but don't allow changes.
994 "Edit file FILENAME in another window but don't allow changes.
1004 "Edit file FILENAME in another frame but don't allow changes.
1014 "Find file FILENAME as a replacement for the file in the next window.
1015 This command does not select that window."
1034 "Find file FILENAME, select its buffer, kill previous buffer.
1035 If the current buffer now contains an empty file that you just visited
1036 \(presumably by mistake), use this command to visit the file you really want."
1066 ;; This prevents us from finding the same buffer
1067 ;; if we specified the same file again.
1071 ;; Likewise for dired buffers.
1075 ;; This executes if find-file gets an error
1076 ;; and does not really find anything.
1077 ;; We put things back as they were.
1078 ;; If find-file actually finds something, we kill obuf below.
1087 ;; We already asked; don't ask again.
1090 \f
1092 "Create a suitably named buffer for visiting FILENAME, and return it.
1093 FILENAME (sans directory) is used unchanged if that name is free;
1094 otherwise a string <2> or <3> or ... is appended to get an unused name."
1101 "Create and return a buffer with a name based on NAME.
1102 Choose the buffer's name using `generate-new-buffer-name'."
1106 "Regexp to match the automounter prefix in a directory name."
1114 "Return a version of FILENAME shortened using `directory-abbrev-alist'.
1116 removes automounter prefixes (see the variable `automount-dir-prefix')."
1117 ;; Get rid of the prefixes added by the automounter.
1124 ;; If any elt of directory-abbrev-alist matches this name,
1125 ;; abbreviate accordingly.
1131 ;; Compute and save the abbreviated homedir name.
1132 ;; We defer computing this until the first time it's needed, to
1133 ;; give time for directory-abbrev-alist to be set properly.
1134 ;; We include a slash at the end, to avoid spurious matches
1135 ;; such as `/usr/foobar' when the home dir is `/usr/foo'.
1142 ;; If FILENAME starts with the abbreviated homedir,
1143 ;; make it start with `~' instead.
1145 ;; If the home dir is just /, don't change it.
1148 ;; MS-DOS root directories can come with a drive letter;
1149 ;; Novell Netware allows drive letters beyond `Z:'.
1159 filename))
1162 "*List of logical names for which visiting shouldn't save the true dirname.
1163 On VMS, when you visit a file using a logical name that searches a path,
1164 you may or may not want the visited file name to record the specific
1165 directory where the file was found. If you *do not* want that, add the logical
1166 name to this list as a string."
1171 "Return the buffer visiting file FILENAME (a string).
1172 This is like `get-file-buffer', except that it checks for any buffer
1173 visiting the same file, possibly under a different name.
1174 If PREDICATE is non-nil, only a buffer satisfying it can be returned.
1175 If there is no such live buffer, return nil."
1189 found)
1194 number
1199 ;; Verify this buffer's file number
1200 ;; still belongs to its file.
1203 attributes)
1207 found))))
1208 \f
1210 "*Non-nil means file-visiting commands should handle wildcards.
1211 For example, if you specify `*.c', that would visit all the files
1212 whose names match the pattern."
1218 "*Non-nil means suppress warning messages for symlinked files.
1219 When nil, Emacs prints a warning when visiting a file that is already
1220 visited, but with a different name. Setting this option to t
1221 suppresses this warning."
1227 "Maximum size of file above which a confirmation is requested.
1228 When nil, never request confirmation."
1234 "Read file FILENAME into a buffer and return the buffer.
1235 If a buffer exists visiting FILENAME, return that one, but
1236 verify that the file has not changed since visited or saved.
1237 The buffer is not selected, just returned to the caller.
1238 Optional first arg NOWARN non-nil means suppress any warning messages.
1239 Optional second arg RAWFILE non-nil means the file is read literally.
1240 Optional third arg WILDCARDS non-nil means do wildcard processing
1241 and visit all the matching files. When wildcards are actually
1242 used and expanded, the value is a list of buffers
1243 that are visiting the various files."
1250 'find-directory-functions
1253 filename)))
1256 find-file-wildcards
1270 ;; Find any buffer for a file which has same truename.
1272 ;; Let user know if there is a buffer with the same truename.
1276 find-file-suppress-same-file-warnings
1280 ;; Optionally also find that buffer.
1283 ;; Check to see if the file looks uncommonly large.
1285 ;; Don't ask again if we already have the file or
1286 ;; if we're asked to be quiet.
1295 ;; We are using an existing buffer.
1301 ;; Certain files should be reverted automatically
1302 ;; if they have changed on disk and not in the buffer.
1310 found))
1320 "File %s changed on disk. Discard your edits? "
1325 "File %s changed on disk. Discard your edits in %s? "
1333 ;; Check if a formerly read-only file has become
1334 ;; writable and vice versa, but if the buffer agrees
1335 ;; with the new state of the file, that is ok too.
1342 buffer-file-name
1350 ;; It is confusing to ask whether to visit
1351 ;; non-literally if they have the file in
1352 ;; hexl-mode.
1356 "Save file and revisit literally? "
1361 rawfile truename number))
1363 "Discard your edits and revisit file literally? "
1366 rawfile truename number)
1370 "Revisit file literally? "
1373 rawfile truename number)
1376 ;; Return the buffer we are using.
1377 buf)
1378 ;; Create a new buffer.
1381 ;; find-file-noselect-1 may use a different buffer.
1383 rawfile truename number))))))
1389 ;; Needed in case we are re-visiting the file with a different
1390 ;; text representation.
1407 filename)))
1408 ;; Unconditionally set error
1418 filename)))
1419 ;; Run find-file-not-found-hooks until one returns non-nil.
1421 ;; If they fail too, set error.
1423 ;; Record the file's truename, and maybe use that as visited name.
1429 ;; On VMS, we may want to remember which directory in a search list
1430 ;; the file was found in.
1442 ;; Set buffer's default directory to that of the file.
1444 ;; Turn off backup files for certain file names. Since
1445 ;; this is a permanent local, the major mode won't eliminate it.
1458 \f
1460 "Like `insert-file-contents', but only reads in the file literally.
1461 A buffer may be modified in several ways after reading into the buffer,
1462 to Emacs features such as format decoding, character code
1463 conversion, `find-file-hook', automatic uncompression, etc.
1465 This function ensures that none of these modifications will take place."
1473 nil))
1476 inhibit-file-name-handlers))
1489 filename)))
1499 "Insert contents of file FILENAME into buffer after point with no conversion.
1501 This function is meant for the user to run interactively.
1502 Don't call it from programs! Use `insert-file-contents-literally' instead.
1503 \(Its calling sequence is different; see its documentation)."
1508 "Non-nil if this buffer was made by `find-file-literally' or equivalent.
1513 "Visit file FILENAME with no conversion of any kind.
1514 Format conversion and character code conversion are both disabled,
1515 and multibyte characters are disabled in the resulting buffer.
1516 The major mode used is Fundamental mode regardless of the file name,
1517 and local variable specifications in the file are ignored.
1518 Automatic uncompression and adding a newline at the end of the
1519 file due to `require-final-newline' is also disabled.
1521 You cannot absolutely rely on this function to result in
1522 visiting the file literally. If Emacs already has a buffer
1523 which is visiting the file, you get the existing buffer,
1524 regardless of whether it was created literally or not.
1526 In a Lisp program, if you want to be sure of accessing a file's
1527 contents literally, you should create a temporary buffer and then read
1528 the file contents into it using `insert-file-contents-literally'."
1531 \f
1535 after-find-file-from-revert-buffer
1536 nomodes)
1537 "Called after finding a file and by the default revert function.
1538 Sets buffer mode, parses local variables.
1539 Optional args ERROR, WARN, and NOAUTO: ERROR non-nil means there was an
1540 error in reading the file. WARN non-nil means warn if there
1541 exists an auto-save file more recent than the visited file.
1542 NOAUTO means don't mess with auto-save mode.
1543 Fourth arg AFTER-FIND-FILE-FROM-REVERT-BUFFER non-nil
1544 means this call was from `revert-buffer'.
1545 Fifth arg NOMODES non-nil means don't alter the file's modes.
1546 Finishes by calling the functions in `find-file-hook'
1547 unless NOMODES is non-nil."
1550 nil
1560 ;; No need to warn if buffer is auto-saved
1561 ;; under the name of the visited file.
1563 auto-save-visited-file-name))
1566 buffer-file-name))
1586 ;; Make people do a little extra work (C-x C-q)
1587 ;; before altering a backup file.
1590 ;; When a file is marked read-only,
1591 ;; make the buffer read-only even if root is looking at it.
1600 view-read-only
1606 "Eval BODY and turn any error into a FORMAT message.
1607 FORMAT can have a %s escape which will be replaced with the actual error.
1608 If `debug-on-error' is set, errors are not caught, so that you can
1609 debug them.
1610 Avoid using a large BODY since it is duplicated."
1619 "Choose the major mode for this buffer automatically.
1620 Also sets up any specified local variables of the file.
1621 Uses the visited file name, the -*- line, and the local variables spec.
1623 This function is called automatically from `find-file'. In that case,
1624 we may set up the file-specified mode and local variables,
1625 depending on the value of `enable-local-variables': if it is t, we do;
1626 if it is nil, we don't; otherwise, we query.
1627 In addition, if `local-enable-local-variables' is nil, we do
1628 not set local variables (though we do notice a mode specified with -*-.)
1630 `enable-local-variables' is ignored if you run `normal-mode' interactively,
1631 or from Lisp without specifying the optional argument FIND-FILE;
1632 in that case, this function acts as if `enable-local-variables' were t."
1644 ;; Note: The entries for the modes defined in cc-mode.el (c-mode,
1645 ;; c++-mode, java-mode and more) are added through autoload
1646 ;; directives in that file. That way is discouraged since it
1647 ;; spreads out the definition of the initial value.
1672 ;; Less common extensions come here
1673 ;; so more common ones above are found faster.
1683 ;; for MSDOS and MS-Windows (which are case-insensitive)
1729 ;; Mailer puts message to be edited in
1730 ;; /tmp/Re.... or Message
1735 ;; some news reader is reported to use this
1743 ;; .emacs or .gnus or .viper following a directory delimiter in
1744 ;; Unix, MSDOG or VMS syntax.
1747 ;; _emacs following a directory delimiter
1748 ;; in MsDos syntax
1761 ;; Get rid of any trailing .n.m and try again.
1762 ;; This is for files saved by cvs-merge that look like .#<file>.<rev>
1763 ;; or .#<file>.<rev>-<rev> or VC's <file>.~<rev>~.
1764 ;; Using mode nil rather than `ignore' would let the search continue
1765 ;; through this list (with the shortened name) rather than start over.
1767 ;; The following should come after the ChangeLog pattern
1768 ;; for the sake of ChangeLog.1, etc.
1769 ;; and after the .scm.[0-9] and CVS' <file>.<rev> patterns too.
1775 "Alist of filename patterns vs corresponding major mode functions.
1776 Each element looks like (REGEXP . FUNCTION) or (REGEXP FUNCTION NON-NIL).
1777 \(NON-NIL stands for anything that is not nil; the value does not matter.)
1778 Visiting a file whose name matches REGEXP specifies FUNCTION as the
1779 mode function to use. FUNCTION will be called, unless it is nil.
1781 If the element has the form (REGEXP FUNCTION NON-NIL), then after
1782 calling FUNCTION (if it's not nil), we delete the suffix that matched
1787 ;; Note: The entries for the modes defined in cc-mode.el (awk-mode
1788 ;; and pike-mode) are added through autoload directives in that
1789 ;; file. That way is discouraged since it spreads out the
1790 ;; definition of the initial value.
1828 "Alist mapping interpreter names to major modes.
1829 This alist applies to files whose first line starts with `#!'.
1830 Each element looks like (INTERPRETER . MODE).
1831 The car of each element is compared with
1832 the name of the interpreter specified in the first line.
1839 "List of regexps for what to ignore, for `inhibit-first-line-modes-regexps'.
1840 When checking `inhibit-first-line-modes-regexps', we first discard
1846 "Regular expression matching interpreters, for file mode determination.
1847 This regular expression is matched against the first line of a file
1848 to determine the file's mode in `set-auto-mode' when Emacs can't deduce
1849 a mode from the file's name. If it matches, the file is assumed to
1850 be interpreted by the interpreter matched by the second group of the
1851 regular expression. The mode is then determined as the mode associated
1855 "Select major mode appropriate for current buffer.
1856 This checks for a -*- mode tag in the buffer's text,
1857 compares the filename against the entries in `auto-mode-alist',
1858 or checks the interpreter that runs this file against
1859 `interpreter-mode-alist'.
1861 It does not check for the `mode:' local variable in the
1862 Local Variables section of the file; for that, use `hack-local-variables'.
1864 If `enable-local-variables' is nil, this function does not check for a
1865 -*- mode tag.
1867 If the optional argument JUST-FROM-FILE-NAME is non-nil,
1868 then we do not set anything but the major mode,
1869 and we don't even do that unless it would come from the file name."
1870 ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*-
1878 ;; Find all specifications for the `mode:' variable
1879 ;; and execute them left to right.
1891 modes)))
1892 ;; Simple -*-MODE-*- case.
1895 modes))))
1896 ;; If we found modes to use, invoke them now,
1897 ;; outside the save-excursion.
1904 ;; If we didn't find a mode from a -*- line, try using the file name.
1908 ;; Remove backup-suffixes from file name.
1914 ;; Find first matching alist entry.
1923 keep-going t)
1925 keep-going nil)))
1928 ;; When JUST-FROM-FILE-NAME is set,
1929 ;; we are working on behalf of set-visited-file-name.
1930 ;; In that case, if the major mode specified is the
1931 ;; same one we already have, don't actually reset it.
1932 ;; We don't want to lose minor modes such as Font Lock.
1935 ;; If we can't deduce a mode from the file name,
1936 ;; look for an interpreter specified in the first line.
1937 ;; As a special case, allow for things like "#!/bin/env perl",
1938 ;; which finds the interpreter anywhere in $PATH.
1945 elt)
1946 ;; Map interpreter name to a mode.
1948 interpreter-mode-alist))
1955 "Find the -*- spec in the buffer.
1956 Call with point at the place to start searching from.
1957 If one is found, set point to the beginning
1958 and return the position of the end.
1959 Otherwise, return nil; point may be changed."
1962 ;; Don't look for -*- if this file name matches any
1963 ;; of the regexps in inhibit-first-line-modes-regexps.
1971 sufs)
1979 ;; If the file begins with "#!"
1980 ;; (exec interpreter magic), look
1981 ;; for mode frobs in the first two
1982 ;; lines. You cannot necessarily
1983 ;; put them in the first line of
1984 ;; such a file without screwing up
1985 ;; the interpreter invocation.
1993 t))
1999 end))))
2002 "Set local variables specified in the -*- line.
2003 Ignore any specification for `mode:' and `coding:';
2004 `set-auto-mode' should already have handled `mode:',
2005 `set-auto-coding' should already have handled `coding:'.
2006 If MODE-ONLY is non-nil, all we do is check whether the major mode
2007 is specified, returning t if it is specified."
2012 mode-specified
2015 ;; Parse the -*- line into the RESULT alist.
2016 ;; Also set MODE-SPECIFIED if we see a spec or `mode'.
2018 nil)
2020 ;; Simple form: "-*- MODENAME -*-". Already handled.
2022 nil)
2024 ;; Hairy form: '-*-' [ <variable> ':' <value> ';' ]* '-*-'
2025 ;; (last ";" is optional).
2030 ;; There used to be a downcase here,
2031 ;; but the manual didn't say so,
2032 ;; and people want to set var names that aren't all lc.
2039 ;; It is traditional to ignore
2040 ;; case when checking for `mode' in set-auto-mode,
2041 ;; so we must do that here as well.
2042 ;; That is inconsistent, but we're stuck with it.
2043 ;; The same can be said for `coding' in set-auto-coding.
2061 ;; If we fail to switch in the selected window,
2062 ;; it is probably a minibuffer.
2063 ;; So try another window.
2074 nil))))
2077 "Normal hook run after processing a file's local variables specs.
2078 Major modes can use this to examine user-specified local variables
2082 "Parse and put into effect this buffer's local variables spec.
2083 If MODE-ONLY is non-nil, all we do is check whether the major mode
2084 is specified, returning t if it is specified."
2086 ;; If MODE-ONLY is t, we check here for specifying the mode
2087 ;; in the -*- line. If MODE-ONLY is nil, we process
2088 ;; the -*- line here.
2092 ;; Look for "Local variables:" line in last page.
2099 mode-only
2109 buffer-file-name)
2113 prefix prefixlen suffix beg
2114 mode-specified
2116 ;; The prefix is what comes before "local variables:" in its line.
2117 ;; The suffix is what comes after "local variables:" in its line.
2132 ;; Look at next local variable spec.
2135 ;; Skip the prefix, if any.
2140 ;; Find the variable name; strip whitespace.
2148 val)
2149 ;; Setting variable named "end" means end of list.
2152 ;; Otherwise read the variable value.
2163 ;; Set the variable. "Variables" mode and eval are funny.
2167 mode-specified))
2173 ;; Get confirmation before setting these variables as locals in a file.
2198 ;; Don't wait for outline.el to be loaded, for the sake of outline-minor-mode.
2228 ;; This case is safe because the user gets to check it before it is used.
2232 "Non-nil if SYM could be dangerous as a file-local variable with value VAL.
2233 If VAL is nil or omitted, the question is whether any value might be
2234 dangerous."
2238 (and (string-match "-hooks?$\\|-functions?$\\|-forms?$\\|-program$\\|-command$\\|-predicate$\\|font-lock-keywords$\\|font-lock-keywords-[0-9]+$\\|font-lock-syntactic-keywords$\\|-frame-alist$\\|-mode-alist$\\|-map$\\|-map-alist$"
2241 ;; If the safe-local-variable property isn't t or nil,
2242 ;; then it must return non-nil on the proposed value to be safe.
2249 Add expressions to this list if you want Emacs to evaluate them, when
2250 they appear in an `eval' local variable specification, without first
2251 asking you for confirmation."
2268 "Return t if it is safe to eval EXP when it is found in a file."
2270 ;; Detect certain `put' expressions.
2276 ;; Only allow safe values of lisp-indent-hook;
2277 ;; not functions.
2280 ;; Allow expressions that the user requested.
2282 ;; Certain functions can be allowed with safe arguments
2283 ;; or can specify verification functions to try.
2291 ok))
2299 ok)))))))
2303 A few patterns are specified so that any name which matches one
2304 is considered risky."
2309 ;; We have already handled coding: tag in set-auto-coding.
2310 nil)
2311 ;; "Setting" eval means either eval it or do nothing.
2312 ;; Likewise for setting hook variables.
2314 ;; Permit evalling a put of a harmless property.
2315 ;; if the args do nothing tricky.
2318 ;; Permit eval if not root and user says ok.
2337 ;; Ordinary variable, really set it.
2339 ;; Make sure the string has no text properties.
2340 ;; Some text properties can get evaluated in various ways,
2341 ;; so it is risky to put them on with a local variable list.
2346 \f
2349 However, the mode will not be changed if
2350 \(1) a local variables list or the `-*-' line specifies a major mode, or
2352 \ not suitable for ordinary files, or
2353 \(3) the new file name does not particularly specify any mode."
2358 "Change name of file visited in current buffer to FILENAME.
2359 The next time the buffer is saved it will go in the newly specified file.
2360 FILENAME nil or an empty string means make buffer not be visiting any file.
2361 Remember to delete the initial contents of the minibuffer
2362 if you wish to pass an empty string as the argument.
2364 The optional second argument NO-QUERY, if non-nil, inhibits asking for
2365 confirmation in the case where another buffer is already visiting FILENAME.
2367 The optional third argument ALONG-WITH-FILE, if non-nil, means that
2368 the old visited file has been renamed to the new name FILENAME."
2376 nil
2387 filename)))
2401 ;; If new-name == old-name, renaming would add a spurious <2>
2402 ;; and it's considered as a feature in rename-buffer.
2408 ;; Abbreviate the file names of the buffer.
2417 nil)))
2418 ;; write-file-functions is normally used for things like ftp-find-file
2419 ;; that visit things that are not local files as if they were files.
2420 ;; Changing to visit an ordinary local file instead should flush the hook.
2425 ;; If buffer was read-only because of version control,
2426 ;; that reason is gone now, so make it writable.
2430 ;; Turn off backup files for certain file names.
2431 ;; Since this is a permanent local, the major mode won't eliminate it.
2438 ;; If auto-save was not already on, turn it on if appropriate.
2442 ;; If auto save is on, start using a new name.
2443 ;; We deliberately don't rename or delete the old auto save
2444 ;; for the old visited file name. This is because perhaps
2445 ;; the user wants to save the new state and then compare with the
2446 ;; previous state from the auto save file.
2449 ;; Rename the old auto save file if any.
2456 ;; Update the major mode, if the file name determines it.
2458 ;; Don't change the mode if it is special.
2461 ;; Don't change the mode if the local variable list specifies it.
2467 "Write current buffer into file FILENAME.
2468 This makes the buffer visit that file, and marks it as not modified.
2470 If you specify just a directory name as FILENAME, that means to use
2471 the default file name but in that directory. You can also yank
2472 the default file name into the minibuffer to edit it, using \\<minibuffer-local-map>\\[next-history-element].
2474 If the buffer is not already visiting a file, the default file name
2475 for the output file is the buffer name.
2477 If optional second arg CONFIRM is non-nil, this function
2478 asks for confirmation before overwriting an existing file.
2479 Interactively, confirmation is required unless you supply a prefix argument."
2480 ;; (interactive "FWrite file: ")
2484 nil nil nil nil)
2488 default-directory)
2489 nil nil))
2493 ;; If arg is just a directory,
2494 ;; use the default file name, but in that directory.
2505 ;; Make buffer writable if file is writable.
2510 \f
2512 "Make a backup of the disk file visited by the current buffer, if appropriate.
2513 This is normally done before saving the buffer the first time.
2515 A backup may be done by renaming or by copying; see documentation of
2516 variable `make-backup-files'. If it's done by renaming, then the file is
2517 no longer accessible under its old name.
2519 The value is non-nil after a backup was made by renaming.
2520 It has the form (MODES . BACKUPNAME).
2521 MODES is the result of `file-modes' on the original
2522 file; this means that the caller, after saving the buffer, should change
2523 the modes of the new file to agree with the old modes.
2524 BACKUPNAME is the backup file name, which is the old file renamed."
2531 backup-info backupname targets setmodes)
2532 ;; If specified name is a symbolic link, chase it to the target.
2533 ;; Thus we make the backups in the directory where the real file is.
2538 ;; (if (file-directory-p buffer-file-name)
2539 ;; (error "Cannot save buffer in directory %s" buffer-file-name))
2543 ;; If have old versions to maybe delete,
2544 ;; ask the user to confirm now, before doing anything.
2545 ;; But don't actually delete til later.
2550 real-file-name)))))
2552 ;; Actually write the back up file.
2555 ; (file-symlink-p buffer-file-name)
2556 backup-by-copying
2557 ;; Don't rename a suid or sgid file.
2571 ;; rename-file should delete old backup.
2575 ;; If trouble writing the backup, write it in ~.
2584 ;; Now delete the old versions, if desired.
2591 setmodes)
2598 ;; If copying fails because file TO-NAME
2599 ;; is not writable, delete that file and try again.
2608 "Return file NAME sans backup versions or strings.
2609 This is a separate procedure so your site-init or startup file can
2610 redefine it.
2611 If the optional argument KEEP-BACKUP-VERSION is non-nil,
2612 we do not remove backup version numbers, only true file version numbers."
2618 ;; VMS version number is (a) semicolon, optional
2619 ;; sign, zero or more digits or (b) period, option
2620 ;; sign, zero or more digits, provided this is the
2621 ;; second period encountered outside of the
2622 ;; device/directory part of the file name.
2625 name)
2635 "Return t if deleting FILE and rewriting it would preserve the owner."
2640 ;; Return t if the file doesn't exist, since it's true that no
2641 ;; information would be lost by an (attempted) delete and create.
2647 The extension, in a file name, is the part that follows the last `.',
2648 except that a leading `.', if any, doesn't count."
2651 directory)
2655 ;; Don't use expand-file-name here; if DIRECTORY is relative,
2656 ;; we don't want to expand it.
2659 filename))))
2663 The extension, in a file name, is the part that follows the last `.',
2664 except that a leading `.', if any, doesn't count.
2665 Return nil for extensionless file names such as `foo'.
2666 Return the empty string for file names such as `foo.'.
2668 If PERIOD is non-nil, then the returned value includes the period
2669 that delimits the extension, and if FILENAME has no extension,
2680 "A function to use instead of the default `make-backup-file-name'.
2681 A value of nil gives the default `make-backup-file-name' behaviour.
2683 This could be buffer-local to do something special for specific
2684 files. If you define it, you may need to change `backup-file-name-p'
2685 and `file-name-sans-versions' too.
2687 See also `backup-directory-alist'."
2693 "Alist of filename patterns and backup directory names.
2694 Each element looks like (REGEXP . DIRECTORY). Backups of files with
2695 names matching REGEXP will be made in DIRECTORY. DIRECTORY may be
2696 relative or absolute. If it is absolute, so that all matching files
2697 are backed up into the same directory, the file names in this
2698 directory will be the full name of the file backed up with all
2699 directory separators changed to `!' to prevent clashes. This will not
2700 work correctly if your filesystem truncates the resulting name.
2702 For the common case of all backups going into one directory, the alist
2704 directory name.
2706 If this variable is nil, or it fails to match a filename, the backup
2707 is made in the original file's directory.
2709 On MS-DOS filesystems without long names this variable is always
2710 ignored."
2716 "Default `backup-enable-predicate' function.
2717 Checks for files in `temporary-file-directory' or
2718 `small-temporary-file-directory'."
2721 ;; Directory is under temporary-file-directory.
2726 0 nil
2728 ;; Directory is under small-temporary-file-directory.
2733 "Create the non-numeric backup file name for FILE.
2734 Normally this will just be the file's name with `~' appended.
2735 Customization hooks are provided as follows.
2737 If the variable `make-backup-file-name-function' is non-nil, its value
2738 should be a function which will be called with FILE as its argument;
2739 the resulting name is used.
2741 Otherwise a match for FILE is sought in `backup-directory-alist'; see
2742 the documentation of that variable. If the directory for the backup
2743 doesn't exist, it is created."
2757 "Subroutine of `make-backup-file-name' and `find-backup-file-name'."
2759 elt backup-directory)
2764 alist nil)))
2770 file
2774 ;; Normalize DOSish file names: downcase the drive
2775 ;; letter, if any, and replace the leading "x:" with
2776 ;; "/drive_x".
2779 ;; Replace any invalid file-name characters (for the
2780 ;; case of backing up remote files).
2784 "drive_"
2787 ""
2790 ;; Make the name unique by substituting directory
2791 ;; separators. It may not really be worth bothering about
2792 ;; doubling `!'s in the original name...
2797 backup-directory))
2804 "Return non-nil if FILE is a backup file name (numeric or not).
2805 This is a separate function so you can redefine it for customization.
2806 You may need to redefine `file-name-sans-versions' as well."
2811 ;; This is used in various files.
2812 ;; The usage of backup-extract-version-start is not very clean,
2813 ;; but I can't see a good alternative, so as of now I am leaving it alone.
2815 "Given the name of a numeric backup file, FN, return the backup number.
2816 Uses the free variable `backup-extract-version-start', whose value should be
2817 the index in the name where the version number begins."
2823 ;; I believe there is no need to alter this behavior for VMS;
2824 ;; since backup files are not made on VMS, it should not get called.
2826 "Find a file name for a backup file FN, and suggestions for deletions.
2827 Value is a list whose car is the name for the backup file
2828 and whose cdr is a list of old versions to consider deleting now.
2829 If the value is nil, don't make a backup.
2830 Uses `backup-directory-alist' in the same way as does
2831 `make-backup-file-name'."
2833 ;; Run a handler for this function so that ange-ftp can refuse to do it.
2837 ;; We don't support numbered backups on plain MS-DOS
2838 ;; when long file names are unavailable.
2848 possibilities deserve-versions-p versions)
2851 base-versions
2854 possibilities)
2855 #'<)
2860 kept-old-versions
2861 kept-new-versions
2868 ;; Delete nothing if there is overflow
2869 ;; in the number of versions to keep.
2875 v))))))))))
2878 "Return number of names file FILENAME has."
2881 ;; (defun file-relative-name (filename &optional directory)
2882 ;; "Convert FILENAME to be relative to DIRECTORY (default: `default-directory').
2883 ;; This function returns a relative file name which is equivalent to FILENAME
2884 ;; when used with that default directory as the default.
2885 ;; If this is impossible (which can happen on MSDOS and Windows
2886 ;; when the file name and directory use different drive names)
2887 ;; then it returns FILENAME."
2888 ;; (save-match-data
2889 ;; (let ((fname (expand-file-name filename)))
2890 ;; (setq directory (file-name-as-directory
2891 ;; (expand-file-name (or directory default-directory))))
2892 ;; ;; On Microsoft OSes, if FILENAME and DIRECTORY have different
2893 ;; ;; drive names, they can't be relative, so return the absolute name.
2894 ;; (if (and (or (eq system-type 'ms-dos)
2895 ;; (eq system-type 'cygwin)
2896 ;; (eq system-type 'windows-nt))
2897 ;; (not (string-equal (substring fname 0 2)
2898 ;; (substring directory 0 2))))
2899 ;; filename
2900 ;; (let ((ancestor ".")
2901 ;; (fname-dir (file-name-as-directory fname)))
2902 ;; (while (and (not (string-match (concat "^" (regexp-quote directory)) fname-dir))
2903 ;; (not (string-match (concat "^" (regexp-quote directory)) fname)))
2904 ;; (setq directory (file-name-directory (substring directory 0 -1))
2905 ;; ancestor (if (equal ancestor ".")
2906 ;; ".."
2907 ;; (concat "../" ancestor))))
2908 ;; ;; Now ancestor is empty, or .., or ../.., etc.
2909 ;; (if (string-match (concat "^" (regexp-quote directory)) fname)
2910 ;; ;; We matched within FNAME's directory part.
2911 ;; ;; Add the rest of FNAME onto ANCESTOR.
2912 ;; (let ((rest (substring fname (match-end 0))))
2913 ;; (if (and (equal ancestor ".")
2914 ;; (not (equal rest "")))
2915 ;; ;; But don't bother with ANCESTOR if it would give us `./'.
2916 ;; rest
2917 ;; (concat (file-name-as-directory ancestor) rest)))
2918 ;; ;; We matched FNAME's directory equivalent.
2919 ;; ancestor))))))
2922 "Convert FILENAME to be relative to DIRECTORY (default: `default-directory').
2923 This function returns a relative file name which is equivalent to FILENAME
2924 when used with that default directory as the default.
2925 If FILENAME and DIRECTORY lie on different machines or on different drives
2926 on a DOS/Windows machine, it returns FILENAME on expanded form."
2930 default-directory))))
2936 ;; Test for different drives on DOS/Windows
2938 ;; Should `cygwin' really be included here? --stef
2941 ;; Test for different remote file system identification
2943 filename
2949 directory nil nil case-fold-search))
2951 directory nil nil case-fold-search))))
2954 ".."
2956 ;; Now ancestor is empty, or .., or ../.., etc.
2958 directory nil nil case-fold-search))
2959 ;; We matched within FILENAME's directory part.
2960 ;; Add the rest of FILENAME onto ANCESTOR.
2963 ;; But don't bother with ANCESTOR if it would give us `./'.
2964 rest
2966 ;; We matched FILENAME's directory equivalent.
2967 ancestor))))))
2968 \f
2970 "Save current buffer in visited file if modified. Versions described below.
2971 By default, makes the previous version into a backup file
2972 if previously requested or if this is the first save.
2974 to become a backup when the next save is done.
2976 unconditionally makes the previous version into a backup file.
2978 to become a backup when the next save is done,
2979 and unconditionally makes the previous version into a backup file.
2981 With argument of 0, never make the previous version into a backup file.
2983 If a file's name is FOO, the names of its numbered backup versions are
2984 FOO.~i~ for various integers i. A non-numbered backup file is called FOO~.
2985 Numeric backups (rather than FOO~) will be made if value of
2986 `version-control' is not the atom `never' and either there are already
2987 numeric versions of the file being backed up, or `version-control' is
2988 non-nil.
2989 We don't want excessive versions piling up, so there are variables
2990 `kept-old-versions', which tells Emacs how many oldest versions to keep,
2991 and `kept-new-versions', which tells how many newest versions to keep.
2992 Defaults are 2 old versions and 2 new.
2993 `dired-kept-versions' controls dired's clean-directory (.) command.
2994 If `delete-old-versions' is nil, system will query user
2995 before trimming versions. Otherwise it does it silently.
2997 If `vc-make-backup-files' is nil, which is the default,
2998 no backup files are made for files managed by version control.
2999 (This is because the version control system itself records previous versions.)
3001 See the subroutine `basic-save-buffer' for more information."
3014 "Delete auto-save file for current buffer if `delete-auto-save-files' is t.
3015 Normally delete only if the file was written by this Emacs since
3016 the last real save, but optional arg FORCE non-nil means delete anyway."
3030 "Normal hook that is run before a buffer is saved to its file."
3036 "Normal hook that is run after a buffer is saved to its file."
3042 "If non-nil, use this coding system for saving the buffer.
3043 More precisely, use this coding system in place of the
3044 value of `buffer-file-coding-system', when saving the buffer.
3045 Calling `write-region' for any purpose other than saving the buffer
3046 will still use `buffer-file-coding-system'; this variable has no effect
3053 "Save the current buffer in its visited file, if it has been modified.
3054 The hooks `write-contents-functions' and `write-file-functions' get a chance
3055 to do the job of saving; if they do not, then the buffer is saved in
3056 the visited file file in the usual way.
3057 Before and after saving the buffer, this function runs
3058 `before-save-hook' and `after-save-hook', respectively."
3061 ;; In an indirect buffer, save its base buffer instead.
3066 setmodes)
3067 ;; On VMS, rename file and buffer to get rid of version number.
3072 ;; Strip VMS version number before save.
3075 ;; Construct a (unique) buffer name to correspond.
3080 ;; If buffer has no file name, ask user for one.
3087 filename))
3112 ;; Support VC version backups.
3118 ;; If a hook returned t, file is already "written".
3119 ;; Otherwise, write it the usual way now.
3121 ;; Now we have saved the current buffer. Let's make sure
3122 ;; that buffer-file-coding-system is fixed to what
3123 ;; actually used for saving by binding it locally.
3133 ;; If the auto-save file was recent before this command,
3134 ;; delete it now.
3136 ;; Support VC `implicit' locking.
3141 ;; This does the "real job" of writing a buffer into its visited file
3142 ;; and making a backup file. This is what is normally done
3143 ;; but inhibited if one of write-file-functions returns non-nil.
3144 ;; It returns a value (MODES . BACKUPNAME), like backup-buffer.
3151 ;; This returns a value (MODES . BACKUPNAME), like backup-buffer.
3165 buffer-file-name)))
3173 ;; If file is precious, write temp name, then rename it.
3174 ;; This requires write access to the containing dir,
3175 ;; which is why we don't try it if we don't have that access.
3177 tempname nogood i succeed
3181 ;; Find the temporary name to write under.
3188 "%s$tmp$%d"
3190 dir i))
3196 tempname nil realname
3197 buffer-file-truename)
3199 ;; If writing the temp file fails,
3200 ;; delete the temp file.
3207 ;; Since we have created an entirely new file
3208 ;; and renamed it, make sure it gets the
3209 ;; right permission bits set.
3211 buffer-file-name)))
3212 ;; We succeeded in writing the temp file,
3213 ;; so rename it.
3215 ;; If file not writable, see if we can make it writable
3216 ;; temporarily while we write it.
3217 ;; But no need to do so if we have just backed it up
3218 ;; (setmodes is set) because that says we're superseding.
3220 ;; Change the mode back, after writing.
3227 buffer-file-name nil t buffer-file-truename)
3229 ;; If we get an error writing the new file, and we made
3230 ;; the backup by renaming, undo the backing-up.
3233 setmodes))
3236 "View the differences between BUFFER and its associated file.
3237 This requires the external program `diff' to be in your `exec-path'."
3252 ;; Display that message for 1 second so that user can read it
3253 ;; in the minibuffer.
3255 ;; return always nil, so that save-buffers-kill-emacs will not move
3256 ;; over to the next unsaved buffer when calling `d'.
3257 nil)
3260 '((?\C-r
3266 ;; Return nil to ask about BUF again.
3267 nil)
3269 (?d diff-buffer-with-file
3275 "Save some modified file-visiting buffers. Asks user about each one.
3276 You can answer `y' to save, `n' not to save, `C-r' to look at the
3277 buffer in question with `view-buffer' before deciding or `d' to
3278 view the differences using `diff-buffer-to-file'.
3280 Optional argument (the prefix) non-nil means save all with no questions.
3281 Optional second argument PRED determines which buffers are considered:
3282 If PRED is nil, all the file-visiting buffers are considered.
3283 If PRED is t, then certain non-file buffers will also be considered.
3284 If PRED is a zero-argument function, it indicates for each buffer whether
3285 to consider it or not when called with that buffer current.
3287 See `save-some-buffers-action-alist' if you want to
3288 change the additional actions you can take on files."
3307 t
3320 save-some-buffers-action-alist))
3327 abbrev-file-name)))
3329 ;; Don't keep bothering user if he says no.
3331 t))))
3334 \f
3336 "Mark current buffer as unmodified, not needing to be saved.
3339 It is not a good idea to use this function in Lisp programs, because it
3340 prints a message in the minibuffer. Instead, use `set-buffer-modified-p'."
3347 "Change whether this buffer is visiting its file read-only.
3348 With arg, set read-only iff arg is positive.
3349 If visiting file read-only and `view-read-only' is non-nil, enter view mode."
3354 nil ; do nothing.
3355 ;; Toggle.
3362 ;; If view-mode is already active, `view-mode-enter' is a nop.
3374 "Insert contents of file FILENAME into buffer after point.
3375 Set mark after the inserted text.
3377 This function is meant for the user to run interactively.
3378 Don't call it from programs! Use `insert-file-contents' instead.
3379 \(Its calling sequence is different; see its documentation)."
3384 "Append the contents of the region to the end of file FILENAME.
3385 When called from a function, expects three arguments,
3386 START, END and FILENAME. START and END are buffer positions
3387 saying what text to write."
3392 "Return most recent backup file for FILENAME or nil if no backups exist."
3393 ;; `make-backup-file-name' will get us the right directory for
3394 ;; ordinary or numeric backups. It might create a directory for
3395 ;; backups as a side-effect, according to `backup-directory-alist'.
3402 tem)
3411 newest))
3414 "Rename current buffer to a similar name not already taken.
3415 This function is useful for creating multiple shell process buffers
3416 or multiple mail buffers, etc."
3424 ;; If the existing buffer name has a <NNN>,
3425 ;; which isn't part of the file name (if any),
3426 ;; then get rid of that.
3432 "Create the directory DIR and any nonexistent parent dirs.
3433 Interactively, the default choice of directory to create
3434 is the current default directory for file names.
3435 That is useful when you have visited a file in a nonexistent directory.
3437 Noninteractively, the second (optional) argument PARENTS says whether
3438 to create parent directories if they don't exist. Interactively,
3439 this happens by default."
3442 nil nil)
3443 t))
3444 ;; If default-directory is a remote directory,
3445 ;; make sure we find its make-directory handler.
3453 create-list)
3460 \f
3463 "Function to use to revert this buffer, or nil to do the default.
3464 The function receives two arguments IGNORE-AUTO and NOCONFIRM,
3469 "Function to use to insert contents when reverting this buffer.
3470 Gets two args, first the nominal file name to use,
3471 and second, t if reading the auto-save file.
3476 "Function to check whether a non-file buffer needs reverting.
3477 This should be a function with one optional argument NOCONFIRM.
3478 Auto Revert Mode sets NOCONFIRM to t. The function should return
3479 non-nil if the buffer should be reverted. A return value of
3480 `fast' means that the need for reverting was not checked, but
3481 that reverting the buffer is fast. The buffer is current when
3482 this function is called.
3484 The idea behind the NOCONFIRM argument is that it should be
3485 non-nil if the buffer is going to be reverted without asking the
3486 user. In such situations, one has to be careful with potentially
3487 time consuming operations.
3489 For more information on how this variable is used by Auto Revert mode,
3493 "Normal hook for `revert-buffer' to run before reverting.
3494 If `revert-buffer-function' is used to override the normal revert
3498 "Normal hook for `revert-buffer' to run after reverting.
3499 Note that the hook value that it runs is the value that was in effect
3500 before reverting; that makes a difference if you have buffer-local
3501 hook functions.
3503 If `revert-buffer-function' is used to override the normal revert
3509 "Replace current buffer text with the text of the visited file on disk.
3510 This undoes all changes since the file was visited or saved.
3511 With a prefix argument, offer to revert from latest auto-save file, if
3512 that is more recent than the visited file.
3514 This command also works for special buffers that contain text which
3515 doesn't come from a file, but reflects some other data base instead:
3516 for example, Dired buffers and `buffer-list' buffers. In these cases,
3517 it reconstructs the buffer contents from the appropriate data base.
3519 When called from Lisp, the first argument is IGNORE-AUTO; only offer
3520 to revert from the auto-save file when this is nil. Note that the
3521 sense of this argument is the reverse of the prefix argument, for the
3522 sake of backward compatibility. IGNORE-AUTO is optional, defaulting
3523 to nil.
3525 Optional second argument NOCONFIRM means don't ask for confirmation at
3526 all. (The local variable `revert-without-query', if non-nil, prevents
3527 confirmation.)
3529 Optional third argument PRESERVE-MODES non-nil means don't alter
3530 the files modes. Normally we reinitialize them using `normal-mode'.
3532 If the value of `revert-buffer-function' is non-nil, it is called to
3533 do all the work for this command. Otherwise, the hooks
3534 `before-revert-hook' and `after-revert-hook' are run at the beginning
3535 and the end, and if `revert-buffer-insert-file-contents-function' is
3536 non-nil, it is called instead of rereading visited file contents."
3538 ;; I admit it's odd to reverse the sense of the prefix argument, but
3539 ;; there is a lot of code out there which assumes that the first
3540 ;; argument should be t to avoid consulting the auto-save file, and
3541 ;; there's no straightforward way to encourage authors to notice a
3542 ;; reversal of the argument sense. So I'm just changing the user
3543 ;; interface, but leaving the programmatic interface the same.
3549 buffer-auto-save-file-name
3554 buffer-auto-save-file-name
3555 buffer-file-name)))
3566 found))
3568 file-name)))
3570 ;; If file was backed up but has changed since,
3571 ;; we shd make another backup.
3575 ;; Get rid of all undo records for this buffer.
3578 ;; Effectively copy the after-revert-hook status,
3579 ;; since after-find-file will clobber it.
3583 after-revert-hook)))
3585 ;; Don't make undo records for the reversion.
3589 file-name auto-save-p)
3592 "File %s no longer exists!"
3594 file-name))
3595 ;; Bind buffer-file-name to nil
3596 ;; so that we don't try to lock the file.
3602 ;; Auto-saved file shoule be read without
3603 ;; any code conversion.
3606 buffer-file-coding-system))))
3607 ;; This force after-insert-file-set-coding
3608 ;; (called from insert-file-contents) to set
3609 ;; buffer-file-coding-system to a proper value.
3612 ;; Note that this preserves point in an intelligent way.
3616 nil nil t))
3618 nil nil t)))))
3619 ;; Recompute the truename in case changes in symlinks
3620 ;; have changed the truename.
3624 ;; Run after-revert-hook as it was before we reverted.
3628 local-hook)
3631 t)))))
3634 "Recover the visited file--get contents from its last auto-save file."
3639 "Visit file FILE, but get contents from its last auto-save file."
3640 ;; Actually putting the file name in the minibuffer should be used
3641 ;; only rarely.
3642 ;; Not just because users often use the default.
3662 ;; Use insert-directory-safely, not insert-directory,
3663 ;; because these files might not exist. In particular,
3664 ;; FILE might not exist if the auto-save file was for
3665 ;; a buffer that didn't visit a file, such as "*mail*".
3666 ;; The code in v20.x called `ls' directly, so we need
3667 ;; to emulate what `ls' did in that case.
3673 ;; Keep the current buffer-file-coding-system.
3675 ;; Auto-saved file shoule be read with special coding.
3684 "Recover auto save files from a previous Emacs session.
3685 This command first displays a Dired buffer showing you the
3686 previous sessions that you could recover from.
3687 To choose one, move point to the proper line and then type C-c C-c.
3688 Then you'll be asked about a number of files to recover."
3698 auto-save-list-file-prefix)))
3699 t)
3708 ;; Each line starts with a space
3709 ;; so that Font Lock mode won't highlight the first character.
3718 "Choose one saved session to recover auto-save files from.
3719 This command is used in the special Dired buffer created by
3722 ;; Get the name of the session file to recover from.
3724 files
3730 ;; Read in the auto-save-list file.
3734 ;; Loop thru the text of that file
3735 ;; and get out the names of the files to recover.
3739 ;; This is a pair of lines for a non-file-visiting buffer.
3740 ;; Get the auto-save file name and manufacture
3741 ;; a "visited file name" from that.
3744 ;; If there is no auto-save file name, the
3745 ;; auto-save-list file is probably corrupted.
3760 ;; This pair of lines is a file-visiting
3761 ;; buffer. Use the visited file name.
3771 ;; Ignore a file if its auto-save file does not exist now.
3775 ;; The file contains a pair of line for each auto-saved buffer.
3776 ;; The first line of the pair contains the visited file name
3777 ;; or is empty if the buffer was not visiting a file.
3778 ;; The second line is the auto-save file name.
3786 files
3792 "Kill some buffers. Asks the user whether to kill each one of them.
3793 Non-interactively, if optional argument LIST is non-`nil', it
3794 specifies the list of buffers to kill, asking for approval for each one."
3805 name
3810 \f
3812 "Toggle auto-saving of contents of current buffer.
3813 With prefix argument ARG, turn auto-saving on if positive, else off."
3818 ;; If auto-save is off because buffer has shrunk,
3819 ;; then toggling should turn it on.
3824 buffer-file-name
3826 ;; If -1 was stored here, to temporarily turn off saving,
3827 ;; turn it back on.
3833 buffer-auto-save-file-name)
3836 "Adjust current buffer's auto save file name for current conditions.
3837 Also rename any existing auto save file, if it was made in this session."
3849 "Return file name to use for auto-saves of current buffer.
3850 Does not consider `auto-save-visited-file-name' as that variable is checked
3851 before calling this function. You can redefine this for customization.
3852 See also `auto-save-file-name-p'."
3856 result uniq)
3857 ;; Apply user-specified translations
3858 ;; to the file name.
3862 filename)
3872 filename))))
3877 ;; We truncate the file name to DOS 8+3 limits
3878 ;; before doing anything else, because the regexp
3879 ;; passed to string-match below cannot handle
3880 ;; extensions longer than 3 characters, multiple
3881 ;; dots, and other atrocities.
3886 fn)
3891 "#"
3894 ;; Make sure auto-save file names don't contain characters
3895 ;; invalid for the underlying filesystem.
3897 ;; Don't modify remote (ange-ftp) filenames
3900 result))
3902 ;; Deal with buffers that don't have any associated files. (Mail
3903 ;; mode tends to create a good number of these.)
3907 file-name)
3908 ;; Eliminate all slashes and backslashes by
3909 ;; replacing them with sequences that start with %.
3910 ;; Quote % also, to keep distinct names distinct.
3919 ;; Generate the file name.
3925 ;; Try a few alternative directories, to get one we can
3926 ;; write it.
3932 ;; Don't modify remote (ange-ftp) filenames
3934 ;; The call to convert-standard-filename is in case
3935 ;; buffer-name includes characters not allowed by the
3936 ;; DOS/Windows filesystems. make-temp-file writes to the
3937 ;; file it creates, so we must fix the file name _before_
3938 ;; make-temp-file is called.
3940 fname))
3942 ;; make-temp-file creates the file,
3943 ;; but we don't want it to exist until we do an auto-save.
3947 file-name)))
3950 "Return non-nil if FILENAME can be yielded by `make-auto-save-file-name'.
3951 FILENAME should lack slashes. You can redefine this for customization."
3953 \f
3955 "Given a shell file name pattern WILDCARD, return an equivalent regexp.
3956 The generated regexp will match a filename iff the filename
3957 matches that wildcard according to shell rules. Only wildcards known
3958 by `sh' are supported."
3960 ;; Copy the initial run of non-special characters.
3963 ;; If no special characters, we're almost done.
3967 j)
3969 result
3990 ;; Found "[^". Insert a `\0' character
3991 ;; (which cannot happen in a filename)
3992 ;; into the character class, so that `^'
3993 ;; is not the first character after `[',
3994 ;; and thus non-special in a regexp.
3999 ;; I don't think `]' can appear in a
4000 ;; character class in a wildcard, but
4001 ;; let's be general here.
4008 i
4021 ;; Shell wildcards should match the entire filename,
4022 ;; not its part. Make the regexp say so.
4024 \f
4027 "*Switches for `list-directory' to pass to `ls' for brief listing."
4033 "/PROTECTION/SIZE/DATE/OWNER/WIDTH=(OWNER:10)"
4035 "*Switches for `list-directory' to pass to `ls' for verbose listing."
4040 "Expand wildcard pattern PATTERN.
4041 This returns a list of file names which match the pattern.
4043 If PATTERN is written as an absolute file name,
4044 the values are absolute also.
4046 If PATTERN is written as a relative file name, it is interpreted
4047 relative to the current default directory, `default-directory'.
4048 The file names returned are normally also relative to the current
4049 default directory. However, if FULL is non-nil, they are absolute."
4053 ;; A list of all dirs that DIRPART specifies.
4054 ;; This can be more than one dir
4055 ;; if DIRPART contains wildcards.
4060 contents)
4065 ;; Filter out "." and ".."
4070 name))
4077 this-dir-contents)
4078 this-dir-contents)
4079 contents))))
4081 contents)))
4084 "Display a list of files in or matching DIRNAME, a la `ls'.
4085 DIRNAME is globbed by the shell if necessary.
4086 Prefix arg (second arg if noninteractive) means supply -l switch to `ls'.
4087 Actions controlled by variables `list-directory-brief-switches'
4088 and `list-directory-verbose-switches'."
4092 nil default-directory nil)
4093 pfx)))
4095 list-directory-brief-switches))
4096 buffer)
4109 ;; Finishing with-output-to-temp-buffer seems to clobber default-directory.
4117 "Quote characters special to the shell in PATTERN, leave wildcards alone.
4119 PATTERN is assumed to represent a file-name wildcard suitable for the
4120 underlying filesystem. For Unix and GNU/Linux, the characters from the
4122 the parts of the pattern which don't include wildcard characters are
4123 quoted with double quotes.
4124 Existing quote characters in PATTERN are left alone, so you can pass
4125 PATTERN that already quotes some of the special characters."
4129 ;; DOS/Windows don't allow `"' in file names. So if the
4130 ;; argument has quotes, we can safely assume it is already
4131 ;; quoted by the caller.
4133 ;; We quote [&()#$'] in case their shell is a port of a
4134 ;; Unixy shell. We quote [,=+] because stock DOS and
4135 ;; Windows shells require that in some cases, such as
4136 ;; passing arguments to batch files that use positional
4137 ;; arguments like %1.
4139 pattern
4142 end)
4159 pattern))))
4166 "*Program to get the amount of free space on a file system.
4167 We assume the output has the format of `df'.
4168 The value of this variable must be just a command name or file name;
4169 if you want to specify options, use `directory-free-space-args'.
4171 A value of nil disables this feature.
4173 If the function `file-system-info' is defined, it is always used in
4174 preference to the program given by this variable."
4180 "*Options to use when running `directory-free-space-program'."
4185 "Return the mount of free space on directory DIR's file system.
4186 The result is a string that gives the number of free 1KB blocks,
4187 or nil if the system call or the program which retrieve the infornmation
4188 fail.
4190 This function calls `file-system-info' if it is available, or invokes the
4191 program specified by `directory-free-space-program' if that is non-nil."
4192 ;; Try to find the number of free blocks. Non-Posix systems don't
4193 ;; always have df, but might have an equivalent system call.
4202 nil t nil
4203 directory-free-space-args
4204 dir)))
4205 ;; Usual format is a header line followed by a line of
4206 ;; numbers.
4211 ;; Move to the end of the "available blocks" number.
4214 ;; Copy it into AVAILABLE.
4220 ;; insert-directory
4221 ;; - must insert _exactly_one_line_ describing FILE if WILDCARD and
4222 ;; FULL-DIRECTORY-P is nil.
4223 ;; The single line of output must display FILE's name as it was
4224 ;; given, namely, an absolute path name.
4225 ;; - must insert exactly one line for each file if WILDCARD or
4226 ;; FULL-DIRECTORY-P is t, plus one optional "total" line
4227 ;; before the file lines, plus optional text after the file lines.
4228 ;; Lines are delimited by "\n", so filenames containing "\n" are not
4229 ;; allowed.
4230 ;; File lines should display the basename.
4231 ;; - must be consistent with
4232 ;; - functions dired-move-to-filename, (these two define what a file line is)
4233 ;; dired-move-to-end-of-filename,
4234 ;; dired-between-files, (shortcut for (not (dired-move-to-filename)))
4235 ;; dired-insert-headerline
4236 ;; dired-after-subdir-garbage (defines what a "total" line is)
4237 ;; - variable dired-subdir-regexp
4238 ;; - may be passed "--dired" as the first argument in SWITCHES.
4239 ;; Filename handlers might have to remove this switch if their
4240 ;; "ls" command does not support it.
4242 "Insert directory listing for FILE, formatted according to SWITCHES.
4243 Leaves point after the inserted text.
4244 SWITCHES may be a string of options, or a list of strings
4245 representing individual options.
4246 Optional third arg WILDCARD means treat FILE as shell wildcard.
4247 Optional fourth arg FULL-DIRECTORY-P means file is a directory and
4248 switches do not contain `d', so that a full listing is expected.
4250 This works by running a directory listing program
4251 whose name is in the variable `insert-directory-program'.
4252 If WILDCARD, it also runs the shell specified by `shell-file-name'.
4254 When SWITCHES contains the long `--dired' option, this function
4255 treats it specially, for the sake of dired. However, the
4256 normally equivalent short `-D' option is just passed on to
4257 `insert-directory-program', as any other option."
4258 ;; We need the directory in order to find the right handler.
4263 wildcard full-directory-p)
4268 ;; Read the actual directory using `insert-directory-program'.
4269 ;; RESULT gets the status code.
4271 ;; putting text property `dired-filename, decode one
4272 ;; bunch by one to preserve that property.
4274 ;; This is to control encoding the arguments in call-process.
4278 default-file-name-coding-system))))
4281 ;; Run ls in the directory part of the file pattern
4282 ;; using the last component as argument.
4289 shell-file-name nil t nil
4290 "-c"
4292 ""
4294 insert-directory-program
4295 " -d "
4297 switches
4299 " -- "
4300 ;; Quote some characters that have
4301 ;; special meanings in shells; but
4302 ;; don't quote the wildcards--we want
4303 ;; them to be special. We also
4304 ;; currently don't quote the quoting
4305 ;; characters in case people want to
4306 ;; use them explicitly to quote
4307 ;; wildcard characters.
4309 ;; SunOS 4.1.3, SVr4 and others need the "." to list the
4310 ;; directory if FILE is a symbolic link.
4312 insert-directory-program nil t nil
4316 ;; Split the switches at any spaces so we can
4317 ;; pass separate options as separate args.
4319 ;; Avoid lossage if FILE starts with `-'.
4327 file))))))))
4329 ;; If `insert-directory-program' failed, signal an error.
4331 ;; Delete the error message it may have output.
4333 ;; On non-Posix systems, we cannot open a directory, so
4334 ;; don't even try, because that will always result in
4335 ;; the ubiquitous "Access denied". Instead, show the
4336 ;; command line so the user can try to guess what went wrong.
4341 insert-directory-program
4343 file result)
4344 ;; Unix. Access the file to get a suitable error.
4364 ;; It seems that we can't trust ls's output as to
4365 ;; byte positions of filenames.
4376 ;; Now decode what read if necessary.
4378 file-name-coding-system
4379 default-file-name-coding-system
4381 coding-no-eol
4382 val pos)
4386 ;; If no coding system is specified or detection is
4387 ;; requested, detect the coding.
4401 ;; Force no eol conversion on a file name, so
4402 ;; that CR is preserved.
4410 ;; Try to insert the amount of free space.
4413 ;; First find the line to put it on.
4417 ;; Replace "total" with "used", to avoid confusion.
4424 "Insert directory listing for FILE, formatted according to SWITCHES.
4426 Like `insert-directory', but if FILE does not exist, it inserts a
4427 message to that effect instead of signaling an error."
4430 ;; Simulate the message printed by `ls'.
4434 "Functions to call with no arguments to query about killing Emacs.
4435 If any of these functions returns nil, killing Emacs is cancelled.
4437 but `kill-emacs', the low level primitive, does not.
4441 "How to ask for confirmation when leaving Emacs.
4442 If nil, the default, don't ask at all. If the value is non-nil, it should
4443 be a predicate function such as `yes-or-no-p'."
4451 "Offer to save each buffer, then kill this Emacs process.
4452 With prefix arg, silently save all file-visiting buffers, then kill."
4461 ;; process-list is not defined on VMS.
4463 active)
4472 ;; Query the user for other things, perhaps.
4477 \f
4478 ;; We use /: as a prefix to "quote" a file name
4479 ;; so that magic file name handlers will not apply to it.
4483 file-name-handler-alist))
4485 ;; We depend on being the last handler on the list,
4486 ;; so that anything else which does need handling
4487 ;; has been handled already.
4488 ;; So it is safe for us to inhibit *all* magic file name handlers.
4497 default-directory))
4498 ;; Get a list of the indices of the args which are file names.
4501 ;; The first six are special because they
4502 ;; return a file name. We want to include the /:
4503 ;; in the return value.
4504 ;; So just avoid stripping it in the first place.
4511 ;; `identity' means just return the first arg
4512 ;; not stripped of its quoting.
4514 ;; `add' means add "/:" to the result.
4516 ;; `quote' means add "/:" to buffer-file-name.
4518 ;; `unquote-then-quote' means set buffer-file-name
4519 ;; temporarily to unquoted filename.
4521 ;; List the arguments which are filenames.
4529 ;; For all other operations, treat the first argument only
4530 ;; as the file name.
4532 method
4533 ;; Copy ARGUMENTS so we can replace elements in it.
4537 ;; Strip off the /: from the file names that have it.
4545 "/"
4560 res))
4563 \f
4587 ;;; arch-tag: bc68d3ea-19ca-468b-aac6-3a4a7766101f
4588 ;;; files.el ends here