1 ;;; files.el --- file input and output commands for Emacs
3 ;; Copyright (C) 1985, 1986, 1987, 1992, 1993, 1994, 1995, 1996,
4 ;; 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
5 ;; 2006, 2007, 2008 Free Software Foundation, Inc.
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software: you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation, either version 3 of the License, or
14 ;; (at your option) any later version.
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
26 ;; Defines most of Emacs's file- and directory-handling functions,
27 ;; including basic file visiting, backup generation, link handling,
28 ;; ITS-id version control, load- and write-hook handling, and the like.
32 (defvar font-lock-keywords
)
35 "Backups of edited data files."
38 (defgroup find-file nil
43 (defcustom delete-auto-save-files t
44 "Non-nil means delete auto-save file when a buffer is saved or killed.
46 Note that the auto-save file will not be deleted if the buffer is killed
47 when it has unsaved changes."
51 (defcustom directory-abbrev-alist
53 "Alist of abbreviations for file directories.
54 A list of elements of the form (FROM . TO), each meaning to replace
55 FROM with TO when it appears in a directory name. This replacement is
56 done when setting up the default directory of a newly visited file.
57 *Every* FROM string should start with `^'.
59 FROM and TO should be equivalent names, which refer to the
60 same directory. Do not use `~' in the TO strings;
61 they should be ordinary absolute directory names.
63 Use this feature when you have directories which you normally refer to
64 via absolute symbolic links. Make TO the name of the link, and FROM
65 the name it is linked to."
66 :type
'(repeat (cons :format
"%v"
73 (defcustom make-backup-files t
74 "Non-nil means make a backup of a file the first time it is saved.
75 This can be done by renaming the file or by copying.
77 Renaming means that Emacs renames the existing file so that it is a
78 backup file, then writes the buffer into a new file. Any other names
79 that the old file had will now refer to the backup file. The new file
80 is owned by you and its group is defaulted.
82 Copying means that Emacs copies the existing file into the backup
83 file, then writes the buffer on top of the existing file. Any other
84 names that the old file had will now refer to the new (edited) file.
85 The file's owner and group are unchanged.
87 The choice of renaming or copying is controlled by the variables
88 `backup-by-copying', `backup-by-copying-when-linked',
89 `backup-by-copying-when-mismatch' and
90 `backup-by-copying-when-privileged-mismatch'. See also `backup-inhibited'."
94 ;; Do this so that local variables based on the file name
95 ;; are not overridden by the major mode.
96 (defvar backup-inhibited nil
97 "Non-nil means don't make a backup, regardless of the other parameters.
98 This variable is intended for use by making it local to a buffer.
99 But it is local only if you make it local.")
100 (put 'backup-inhibited
'permanent-local t
)
102 (defcustom backup-by-copying nil
103 "Non-nil means always use copying to create backup files.
104 See documentation of variable `make-backup-files'."
108 (defcustom backup-by-copying-when-linked nil
109 "Non-nil means use copying to create backups for files with multiple names.
110 This causes the alternate names to refer to the latest version as edited.
111 This variable is relevant only if `backup-by-copying' is nil."
115 (defcustom backup-by-copying-when-mismatch nil
116 "Non-nil means create backups by copying if this preserves owner or group.
117 Renaming may still be used (subject to control of other variables)
118 when it would not result in changing the owner or group of the file;
119 that is, for files which are owned by you and whose group matches
120 the default for a new file created there by you.
121 This variable is relevant only if `backup-by-copying' is nil."
125 (defcustom backup-by-copying-when-privileged-mismatch
200
126 "Non-nil means create backups by copying to preserve a privileged owner.
127 Renaming may still be used (subject to control of other variables)
128 when it would not result in changing the owner of the file or if the owner
129 has a user id greater than the value of this variable. This is useful
130 when low-numbered uid's are used for special system users (such as root)
131 that must maintain ownership of certain files.
132 This variable is relevant only if `backup-by-copying' and
133 `backup-by-copying-when-mismatch' are nil."
134 :type
'(choice (const nil
) integer
)
137 (defvar backup-enable-predicate
'normal-backup-enable-predicate
138 "Predicate that looks at a file name and decides whether to make backups.
139 Called with an absolute file name as argument, it returns t to enable backup.")
141 (defcustom buffer-offer-save nil
142 "Non-nil in a buffer means always offer to save buffer on exit.
143 Do so even if the buffer is not visiting a file.
144 Automatically local in all buffers."
147 (make-variable-buffer-local 'buffer-offer-save
)
149 (defcustom find-file-existing-other-name t
150 "Non-nil means find a file under alternative names, in existing buffers.
151 This means if any existing buffer is visiting the file you want
152 under another name, you get the existing buffer instead of a new buffer."
156 (defcustom find-file-visit-truename nil
157 "Non-nil means visit a file under its truename.
158 The truename of a file is found by chasing all links
159 both at the file level and at the levels of the containing directories."
162 (put 'find-file-visit-truename
'safe-local-variable
'booleanp
)
164 (defcustom revert-without-query nil
165 "Specify which files should be reverted without query.
166 The value is a list of regular expressions.
167 If the file name matches one of these regular expressions,
168 then `revert-buffer' reverts the file without querying
169 if the file has changed on disk and you have not edited the buffer."
170 :type
'(repeat regexp
)
173 (defvar buffer-file-number nil
174 "The device number and file number of the file visited in the current buffer.
175 The value is a list of the form (FILENUM DEVNUM).
176 This pair of numbers uniquely identifies the file.
177 If the buffer is visiting a new file, the value is nil.")
178 (make-variable-buffer-local 'buffer-file-number
)
179 (put 'buffer-file-number
'permanent-local t
)
181 (defvar buffer-file-numbers-unique
(not (memq system-type
'(windows-nt)))
182 "Non-nil means that `buffer-file-number' uniquely identifies files.")
184 (defvar buffer-file-read-only nil
185 "Non-nil if visited file was read-only when visited.")
186 (make-variable-buffer-local 'buffer-file-read-only
)
188 (defcustom temporary-file-directory
189 (file-name-as-directory
190 (cond ((memq system-type
'(ms-dos windows-nt
))
191 (or (getenv "TEMP") (getenv "TMPDIR") (getenv "TMP") "c:/temp"))
193 (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "/tmp"))))
194 "The directory for writing temporary files."
198 (defcustom small-temporary-file-directory
199 (if (eq system-type
'ms-dos
) (getenv "TMPDIR"))
200 "The directory for writing small temporary files.
201 If non-nil, this directory is used instead of `temporary-file-directory'
202 by programs that create small temporary files. This is for systems that
203 have fast storage with limited space, such as a RAM disk."
205 :type
'(choice (const nil
) directory
))
207 ;; The system null device. (Should reference NULL_DEVICE from C.)
208 (defvar null-device
"/dev/null" "The system null device.")
210 (declare-function msdos-long-file-names
"msdos.c")
211 (declare-function w32-long-file-name
"w32proc.c")
212 (declare-function dired-get-filename
"dired" (&optional localp no-error-if-not-filep
))
213 (declare-function dired-unmark
"dired" (arg))
214 (declare-function dired-do-flagged-delete
"dired" (&optional nomessage
))
215 (declare-function dos-8
+3-filename
"dos-fns" (filename))
216 (declare-function view-mode-disable
"view" ())
218 (defvar file-name-invalid-regexp
219 (cond ((and (eq system-type
'ms-dos
) (not (msdos-long-file-names)))
220 (concat "^\\([^A-Z[-`a-z]\\|..+\\)?:\\|" ; colon except after drive
221 "[+, ;=|<>\"?*]\\|\\[\\|\\]\\|" ; invalid characters
222 "[\000-\037]\\|" ; control characters
223 "\\(/\\.\\.?[^/]\\)\\|" ; leading dots
224 "\\(/[^/.]+\\.[^/.]*\\.\\)")) ; more than a single dot
225 ((memq system-type
'(ms-dos windows-nt cygwin
))
226 (concat "^\\([^A-Z[-`a-z]\\|..+\\)?:\\|" ; colon except after drive
227 "[|<>\"?*\000-\037]")) ; invalid characters
229 "Regexp recognizing file names which aren't allowed by the filesystem.")
231 (defcustom file-precious-flag nil
232 "Non-nil means protect against I/O errors while saving files.
233 Some modes set this non-nil in particular buffers.
235 This feature works by writing the new contents into a temporary file
236 and then renaming the temporary file to replace the original.
237 In this way, any I/O error in writing leaves the original untouched,
238 and there is never any instant where the file is nonexistent.
240 Note that this feature forces backups to be made by copying.
241 Yet, at the same time, saving a precious file
242 breaks any hard links between it and other files.
244 This feature is advisory: for example, if the directory in which the
245 file is being saved is not writeable, Emacs may ignore a non-nil value
246 of `file-precious-flag' and write directly into the file."
250 (defcustom version-control nil
251 "Control use of version numbers for backup files.
252 When t, make numeric backup versions unconditionally.
253 When nil, make them for files that have some already.
254 The value `never' means do not make them."
255 :type
'(choice (const :tag
"Never" never
)
256 (const :tag
"If existing" nil
)
257 (other :tag
"Always" t
))
260 (put 'version-control
'safe-local-variable
261 '(lambda (x) (or (booleanp x
) (equal x
'never
))))
263 (defcustom dired-kept-versions
2
264 "When cleaning directory, number of versions to keep."
269 (defcustom delete-old-versions nil
270 "If t, delete excess backup versions silently.
271 If nil, ask confirmation. Any other value prevents any trimming."
272 :type
'(choice (const :tag
"Delete" t
)
273 (const :tag
"Ask" nil
)
274 (other :tag
"Leave" other
))
277 (defcustom kept-old-versions
2
278 "Number of oldest versions to keep when a new numbered backup is made."
281 (put 'kept-old-versions
'safe-local-variable
'integerp
)
283 (defcustom kept-new-versions
2
284 "Number of newest versions to keep when a new numbered backup is made.
285 Includes the new backup. Must be > 0"
288 (put 'kept-new-versions
'safe-local-variable
'integerp
)
290 (defcustom require-final-newline nil
291 "Whether to add a newline automatically at the end of the file.
293 A value of t means do this only when the file is about to be saved.
294 A value of `visit' means do this right after the file is visited.
295 A value of `visit-save' means do it at both of those times.
296 Any other non-nil value means ask user whether to add a newline, when saving.
297 A value of nil means don't add newlines.
299 Certain major modes set this locally to the value obtained
300 from `mode-require-final-newline'."
301 :type
'(choice (const :tag
"When visiting" visit
)
302 (const :tag
"When saving" t
)
303 (const :tag
"When visiting or saving" visit-save
)
304 (const :tag
"Don't add newlines" nil
)
305 (other :tag
"Ask each time" ask
))
306 :group
'editing-basics
)
308 (defcustom mode-require-final-newline t
309 "Whether to add a newline at end of file, in certain major modes.
310 Those modes set `require-final-newline' to this value when you enable them.
311 They do so because they are often used for files that are supposed
312 to end in newlines, and the question is how to arrange that.
314 A value of t means do this only when the file is about to be saved.
315 A value of `visit' means do this right after the file is visited.
316 A value of `visit-save' means do it at both of those times.
317 Any other non-nil value means ask user whether to add a newline, when saving.
319 A value of nil means do not add newlines. That is a risky choice in this
320 variable since this value is used for modes for files that ought to have
321 final newlines. So if you set this to nil, you must explicitly check and
322 add a final newline, whenever you save a file that really needs one."
323 :type
'(choice (const :tag
"When visiting" visit
)
324 (const :tag
"When saving" t
)
325 (const :tag
"When visiting or saving" visit-save
)
326 (const :tag
"Don't add newlines" nil
)
327 (other :tag
"Ask each time" ask
))
328 :group
'editing-basics
331 (defcustom auto-save-default t
332 "Non-nil says by default do auto-saving of every file-visiting buffer."
336 (defcustom auto-save-file-name-transforms
337 `(("\\`/[^/]*:\\([^/]*/\\)*\\([^/]*\\)\\'"
338 ;; Don't put "\\2" inside expand-file-name, since it will be
339 ;; transformed to "/2" on DOS/Windows.
340 ,(concat temporary-file-directory
"\\2") t
))
341 "Transforms to apply to buffer file name before making auto-save file name.
342 Each transform is a list (REGEXP REPLACEMENT UNIQUIFY):
343 REGEXP is a regular expression to match against the file name.
344 If it matches, `replace-match' is used to replace the
345 matching part with REPLACEMENT.
346 If the optional element UNIQUIFY is non-nil, the auto-save file name is
347 constructed by taking the directory part of the replaced file-name,
348 concatenated with the buffer file name with all directory separators
349 changed to `!' to prevent clashes. This will not work
350 correctly if your filesystem truncates the resulting name.
352 All the transforms in the list are tried, in the order they are listed.
353 When one transform applies, its result is final;
354 no further transforms are tried.
356 The default value is set up to put the auto-save file into the
357 temporary directory (see the variable `temporary-file-directory') for
358 editing a remote file.
360 On MS-DOS filesystems without long names this variable is always
363 :type
'(repeat (list (string :tag
"Regexp") (string :tag
"Replacement")
364 (boolean :tag
"Uniquify")))
367 (defcustom save-abbrevs t
368 "Non-nil means save word abbrevs too when files are saved.
369 If `silently', don't ask the user before saving."
370 :type
'(choice (const t
) (const nil
) (const silently
))
373 (defcustom find-file-run-dired t
374 "Non-nil means allow `find-file' to visit directories.
375 To visit the directory, `find-file' runs `find-directory-functions'."
379 (defcustom find-directory-functions
'(cvs-dired-noselect dired-noselect
)
380 "List of functions to try in sequence to visit a directory.
381 Each function is called with the directory name as the sole argument
382 and should return either a buffer or nil."
383 :type
'(hook :options
(cvs-dired-noselect dired-noselect
))
386 ;;;It is not useful to make this a local variable.
387 ;;;(put 'find-file-not-found-hooks 'permanent-local t)
388 (defvar find-file-not-found-functions nil
389 "List of functions to be called for `find-file' on nonexistent file.
390 These functions are called as soon as the error is detected.
391 Variable `buffer-file-name' is already set up.
392 The functions are called in the order given until one of them returns non-nil.")
393 (define-obsolete-variable-alias 'find-file-not-found-hooks
394 'find-file-not-found-functions
"22.1")
396 ;;;It is not useful to make this a local variable.
397 ;;;(put 'find-file-hooks 'permanent-local t)
398 (define-obsolete-variable-alias 'find-file-hooks
'find-file-hook
"22.1")
399 (defcustom find-file-hook nil
400 "List of functions to be called after a buffer is loaded from a file.
401 The buffer's local variables (if any) will have been processed before the
402 functions are called."
405 :options
'(auto-insert)
408 (defvar write-file-functions nil
409 "List of functions to be called before writing out a buffer to a file.
410 If one of them returns non-nil, the file is considered already written
411 and the rest are not called.
412 These hooks are considered to pertain to the visited file.
413 So any buffer-local binding of this variable is discarded if you change
414 the visited file name with \\[set-visited-file-name], but not when you
415 change the major mode.
417 This hook is not run if any of the functions in
418 `write-contents-functions' returns non-nil. Both hooks pertain
419 to how to save a buffer to file, for instance, choosing a suitable
420 coding system and setting mode bits. (See Info
421 node `(elisp)Saving Buffers'.) To perform various checks or
422 updates before the buffer is saved, use `before-save-hook'.")
423 (put 'write-file-functions
'permanent-local t
)
424 (define-obsolete-variable-alias 'write-file-hooks
'write-file-functions
"22.1")
426 (defvar local-write-file-hooks nil
)
427 (make-variable-buffer-local 'local-write-file-hooks
)
428 (put 'local-write-file-hooks
'permanent-local t
)
429 (make-obsolete-variable 'local-write-file-hooks
'write-file-functions
"22.1")
431 (defvar write-contents-functions nil
432 "List of functions to be called before writing out a buffer to a file.
433 If one of them returns non-nil, the file is considered already written
434 and the rest are not called and neither are the functions in
435 `write-file-functions'.
437 This variable is meant to be used for hooks that pertain to the
438 buffer's contents, not to the particular visited file; thus,
439 `set-visited-file-name' does not clear this variable; but changing the
440 major mode does clear it.
442 For hooks that _do_ pertain to the particular visited file, use
443 `write-file-functions'. Both this variable and
444 `write-file-functions' relate to how a buffer is saved to file.
445 To perform various checks or updates before the buffer is saved,
446 use `before-save-hook'.")
447 (make-variable-buffer-local 'write-contents-functions
)
448 (define-obsolete-variable-alias 'write-contents-hooks
449 'write-contents-functions
"22.1")
451 (defcustom enable-local-variables t
452 "Control use of local variables in files you visit.
453 The value can be t, nil, :safe, :all, or something else.
455 A value of t means file local variables specifications are obeyed
456 if all the specified variable values are safe; if any values are
457 not safe, Emacs queries you, once, whether to set them all.
458 \(When you say yes to certain values, they are remembered as safe.)
460 :safe means set the safe variables, and ignore the rest.
461 :all means set all variables, whether safe or not.
462 (Don't set it permanently to :all.)
463 A value of nil means always ignore the file local variables.
465 Any other value means always query you once whether to set them all.
466 \(When you say yes to certain values, they are remembered as safe, but
467 this has no effect when `enable-local-variables' is \"something else\".)
469 This variable also controls use of major modes specified in
472 The command \\[normal-mode], when used interactively,
473 always obeys file local variable specifications and the -*- line,
474 and ignores this variable."
475 :type
'(choice (const :tag
"Query Unsafe" t
)
476 (const :tag
"Safe Only" :safe
)
477 (const :tag
"Do all" :all
)
478 (const :tag
"Ignore" nil
)
479 (other :tag
"Query" other
))
482 (defvar local-enable-local-variables t
483 "Like `enable-local-variables' but meant for buffer-local bindings.
484 The meaningful values are nil and non-nil. The default is non-nil.
485 If a major mode sets this to nil, buffer-locally, then any local
486 variables list in the file will be ignored.
488 This variable does not affect the use of major modes
489 specified in a -*- line.")
491 (defcustom enable-local-eval
'maybe
492 "Control processing of the \"variable\" `eval' in a file's local variables.
493 The value can be t, nil or something else.
494 A value of t means obey `eval' variables.
495 A value of nil means ignore them; anything else means query."
496 :type
'(choice (const :tag
"Obey" t
)
497 (const :tag
"Ignore" nil
)
498 (other :tag
"Query" other
))
501 ;; Avoid losing in versions where CLASH_DETECTION is disabled.
502 (or (fboundp 'lock-buffer
)
503 (defalias 'lock-buffer
'ignore
))
504 (or (fboundp 'unlock-buffer
)
505 (defalias 'unlock-buffer
'ignore
))
506 (or (fboundp 'file-locked-p
)
507 (defalias 'file-locked-p
'ignore
))
509 (defcustom view-read-only nil
510 "Non-nil means buffers visiting files read-only do so in view mode.
511 In fact, this means that all read-only buffers normally have
512 View mode enabled, including buffers that are read-only because
513 you visit a file you cannot alter, and buffers you make read-only
514 using \\[toggle-read-only]."
518 (defvar file-name-history nil
519 "History list of file names entered in the minibuffer.
521 Maximum length of the history list is determined by the value
522 of `history-length', which see.")
524 (put 'ange-ftp-completion-hook-function
'safe-magic t
)
525 (defun ange-ftp-completion-hook-function (op &rest args
)
526 "Provides support for ange-ftp host name completion.
527 Runs the usual ange-ftp hook, but only for completion operations."
528 ;; Having this here avoids the need to load ange-ftp when it's not
530 (if (memq op
'(file-name-completion file-name-all-completions
))
531 (apply 'ange-ftp-hook-function op args
)
532 (let ((inhibit-file-name-handlers
533 (cons 'ange-ftp-completion-hook-function
534 (and (eq inhibit-file-name-operation op
)
535 inhibit-file-name-handlers
)))
536 (inhibit-file-name-operation op
))
539 (defun convert-standard-filename (filename)
540 "Convert a standard file's name to something suitable for the OS.
541 This means to guarantee valid names and perhaps to canonicalize
544 FILENAME should be an absolute file name since the conversion rules
545 sometimes vary depending on the position in the file name. E.g. c:/foo
546 is a valid DOS file name, but c:/bar/c:/foo is not.
548 This function's standard definition is trivial; it just returns
549 the argument. However, on Windows and DOS, replace invalid
550 characters. On DOS, make sure to obey the 8.3 limitations.
551 In the native Windows build, turn Cygwin names into native names,
552 and also turn slashes into backslashes if the shell requires it (see
553 `w32-shell-dos-semantics').
555 See Info node `(elisp)Standard File Names' for more details."
556 (if (eq system-type
'cygwin
)
557 (let ((name (copy-sequence filename
))
559 ;; Replace invalid filename characters with !
560 (while (string-match "[?*:<>|\"\000-\037]" name start
)
561 (aset name
(match-beginning 0) ?
!)
562 (setq start
(match-end 0)))
566 (defun read-directory-name (prompt &optional dir default-dirname mustmatch initial
)
567 "Read directory name, prompting with PROMPT and completing in directory DIR.
568 Value is not expanded---you must call `expand-file-name' yourself.
569 Default name to DEFAULT-DIRNAME if user exits with the same
570 non-empty string that was inserted by this function.
571 (If DEFAULT-DIRNAME is omitted, DIR combined with INITIAL is used,
572 or just DIR if INITIAL is nil.)
573 If the user exits with an empty minibuffer, this function returns
574 an empty string. (This can only happen if the user erased the
575 pre-inserted contents or if `insert-default-directory' is nil.)
576 Fourth arg MUSTMATCH non-nil means require existing directory's name.
577 Non-nil and non-t means also require confirmation after completion.
578 Fifth arg INITIAL specifies text to start with.
579 DIR should be an absolute directory name. It defaults to
580 the value of `default-directory'."
582 (setq dir default-directory
))
583 (read-file-name prompt dir
(or default-dirname
584 (if initial
(expand-file-name initial dir
)
591 "Show the current default directory."
593 (message "Directory %s" default-directory
))
596 "Value of the CDPATH environment variable, as a list.
597 Not actually set up until the first time you use it.")
599 (defun parse-colon-path (cd-path)
600 "Explode a search path into a list of directory names.
601 Directories are separated by occurrences of `path-separator'
602 \(which is colon in GNU and GNU-like systems)."
603 ;; We could use split-string here.
605 (let (cd-list (cd-start 0) cd-colon
)
606 (setq cd-path
(concat cd-path path-separator
))
607 (while (setq cd-colon
(string-match path-separator cd-path cd-start
))
610 (list (if (= cd-start cd-colon
)
612 (substitute-in-file-name
613 (file-name-as-directory
614 (substring cd-path cd-start cd-colon
)))))))
615 (setq cd-start
(+ cd-colon
1)))
618 (defun cd-absolute (dir)
619 "Change current directory to given absolute file name DIR."
620 ;; Put the name into directory syntax now,
621 ;; because otherwise expand-file-name may give some bad results.
622 (setq dir
(file-name-as-directory dir
))
623 (setq dir
(abbreviate-file-name (expand-file-name dir
)))
624 (if (not (file-directory-p dir
))
625 (if (file-exists-p dir
)
626 (error "%s is not a directory" dir
)
627 (error "%s: no such directory" dir
))
628 (unless (file-executable-p dir
)
629 (error "Cannot cd to %s: Permission denied" dir
))
630 (setq default-directory dir
)
631 (set (make-local-variable 'list-buffers-directory
) dir
)))
634 "Make DIR become the current buffer's default directory.
635 If your environment includes a `CDPATH' variable, try each one of
636 that list of directories (separated by occurrences of
637 `path-separator') when resolving a relative directory name.
638 The path separator is colon in GNU and GNU-like systems."
640 (list (read-directory-name "Change default directory: "
641 default-directory default-directory
642 (and (member cd-path
'(nil ("./")))
643 (null (getenv "CDPATH"))))))
644 (if (file-name-absolute-p dir
)
645 (cd-absolute (expand-file-name dir
))
647 (let ((trypath (parse-colon-path (getenv "CDPATH"))))
648 (setq cd-path
(or trypath
(list "./")))))
649 (if (not (catch 'found
651 (function (lambda (x)
652 (let ((f (expand-file-name (concat x dir
))))
653 (if (file-directory-p f
)
656 (throw 'found t
))))))
659 (error "No such directory found via CDPATH environment variable"))))
661 (defun load-file (file)
662 "Load the Lisp file named FILE."
663 ;; This is a case where .elc makes a lot of sense.
664 (interactive (list (let ((completion-ignored-extensions
665 (remove ".elc" completion-ignored-extensions
)))
666 (read-file-name "Load file: "))))
667 (load (expand-file-name file
) nil nil t
))
669 (defun locate-file (filename path
&optional suffixes predicate
)
670 "Search for FILENAME through PATH.
671 If found, return the absolute file name of FILENAME, with its suffixes;
672 otherwise return nil.
673 PATH should be a list of directories to look in, like the lists in
674 `exec-path' or `load-path'.
675 If SUFFIXES is non-nil, it should be a list of suffixes to append to
676 file name when searching. If SUFFIXES is nil, it is equivalent to '(\"\").
677 Use '(\"/\") to disable PATH search, but still try the suffixes in SUFFIXES.
678 If non-nil, PREDICATE is used instead of `file-readable-p'.
679 PREDICATE can also be an integer to pass to the `access' system call,
680 in which case file-name handlers are ignored. This usage is deprecated.
682 For compatibility, PREDICATE can also be one of the symbols
683 `executable', `readable', `writable', or `exists', or a list of
684 one or more of those symbols."
685 (if (and predicate
(symbolp predicate
) (not (functionp predicate
)))
686 (setq predicate
(list predicate
)))
687 (when (and (consp predicate
) (not (functionp predicate
)))
689 (logior (if (memq 'executable predicate
) 1 0)
690 (if (memq 'writable predicate
) 2 0)
691 (if (memq 'readable predicate
) 4 0))))
692 (locate-file-internal filename path suffixes predicate
))
694 (defun locate-file-completion-table (dirs suffixes string pred action
)
695 "Do completion for file names passed to `locate-file'."
696 (if (file-name-absolute-p string
)
697 (let ((read-file-name-predicate pred
))
698 (read-file-name-internal string nil action
))
700 (suffix (concat (regexp-opt suffixes t
) "\\'"))
701 (string-dir (file-name-directory string
)))
704 (setq dir default-directory
))
705 (if string-dir
(setq dir
(expand-file-name string-dir dir
)))
706 (when (file-directory-p dir
)
707 (dolist (file (file-name-all-completions
708 (file-name-nondirectory string
) dir
))
709 (add-to-list 'names
(if string-dir
(concat string-dir file
) file
))
710 (when (string-match suffix file
)
711 (setq file
(substring file
0 (match-beginning 0)))
712 (push (if string-dir
(concat string-dir file
) file
) names
)))))
713 (complete-with-action action names string pred
))))
715 (defun locate-file-completion (string path-and-suffixes action
)
716 "Do completion for file names passed to `locate-file'.
717 PATH-AND-SUFFIXES is a pair of lists, (DIRECTORIES . SUFFIXES)."
718 (locate-file-completion-table (car path-and-suffixes
)
719 (cdr path-and-suffixes
)
721 (make-obsolete 'locate-file-completion
'locate-file-completion-table
"23.1")
723 (defvar locate-dominating-stop-dir-regexp
724 "\\`\\(?:[\\/][\\/]\\|/\\(?:net\\|afs\\|\\.\\.\\.\\)/\\)\\'"
725 "Regexp of directory names which stop the search in `locate-dominating-file'.
726 Any directory whose name matches this regexp will be treated like
727 a kind of root directory by `locate-dominating-file' which will stop its search
728 when it bumps into it.
729 The default regexp prevents fruitless and time-consuming attempts to find
730 special files in directories in which filenames are interpreted as hostnames.")
732 ;; (defun locate-dominating-files (file regexp)
733 ;; "Look up the directory hierarchy from FILE for a file matching REGEXP.
734 ;; Stop at the first parent where a matching file is found and return the list
735 ;; of files that that match in this directory."
737 ;; ;; `user' is not initialized yet because `file' may not exist, so we may
738 ;; ;; have to walk up part of the hierarchy before we find the "initial UID".
740 ;; ;; Abbreviate, so as to stop when we cross ~/.
741 ;; (dir (abbreviate-file-name (file-name-as-directory file)))
744 ;; ;; As a heuristic, we stop looking up the hierarchy of
745 ;; ;; directories as soon as we find a directory belonging to
746 ;; ;; another user. This should save us from looking in
747 ;; ;; things like /net and /afs. This assumes that all the
748 ;; ;; files inside a project belong to the same user.
749 ;; (let ((prev-user user))
750 ;; (setq user (nth 2 (file-attributes dir)))
751 ;; (or (null prev-user) (equal user prev-user))))
752 ;; (if (setq files (condition-case nil
753 ;; (directory-files dir 'full regexp 'nosort)
755 ;; (throw 'found files)
757 ;; (setq dir (file-name-directory
758 ;; (directory-file-name dir))))
762 (defun locate-dominating-file (file name
)
763 "Look up the directory hierarchy from FILE for a file named NAME.
764 Stop at the first parent directory containing a file NAME,
765 and return the directory. Return nil if not found."
766 ;; We used to use the above locate-dominating-files code, but the
767 ;; directory-files call is very costly, so we're much better off doing
768 ;; multiple calls using the code in here.
770 ;; Represent /home/luser/foo as ~/foo so that we don't try to look for
771 ;; `name' in /home or in /.
772 (setq file
(abbreviate-file-name file
))
775 ;; `user' is not initialized outside the loop because
776 ;; `file' may not exist, so we may have to walk up part of the
777 ;; hierarchy before we find the "initial UID".
782 ;; FIXME: Disabled this heuristic because it is sometimes
784 ;; As a heuristic, we stop looking up the hierarchy of
785 ;; directories as soon as we find a directory belonging
786 ;; to another user. This should save us from looking in
787 ;; things like /net and /afs. This assumes that all the
788 ;; files inside a project belong to the same user.
789 ;; (let ((prev-user user))
790 ;; (setq user (nth 2 (file-attributes file)))
791 ;; (and prev-user (not (equal user prev-user))))
792 (string-match locate-dominating-stop-dir-regexp file
)))
793 (setq try
(file-exists-p (expand-file-name name file
)))
794 (cond (try (setq root file
))
795 ((equal file
(setq prev-file file
796 file
(file-name-directory
797 (directory-file-name file
))))
802 (defun executable-find (command)
803 "Search for COMMAND in `exec-path' and return the absolute file name.
804 Return nil if COMMAND is not found anywhere in `exec-path'."
805 ;; Use 1 rather than file-executable-p to better match the behavior of
807 (locate-file command exec-path exec-suffixes
1))
809 (defun load-library (library)
810 "Load the library named LIBRARY.
811 This is an interface to the function `load'."
813 (list (completing-read "Load library: "
814 (apply-partially 'locate-file-completion-table
816 (get-load-suffixes)))))
819 (defun file-remote-p (file &optional identification connected
)
820 "Test whether FILE specifies a location on a remote system.
821 Returns nil or a string identifying the remote connection (ideally
822 a prefix of FILE). For example, the remote identification for filename
823 \"/user@host:/foo\" could be \"/user@host:\".
824 A file is considered \"remote\" if accessing it is likely to be slower or
825 less reliable than accessing local files.
826 Furthermore, relative file names do not work across remote connections.
828 IDENTIFICATION specifies which part of the identification shall
829 be returned as string. IDENTIFICATION can be the symbol
830 `method', `user', `host' or `localname'; any other value is
831 handled like nil and means to return the complete identification
834 If CONNECTED is non-nil, the function returns an identification only
835 if FILE is located on a remote system, and a connection is established
836 to that remote system.
838 `file-remote-p' will never open a connection on its own."
839 (let ((handler (find-file-name-handler file
'file-remote-p
)))
841 (funcall handler
'file-remote-p file identification connected
)
844 (defun file-local-copy (file)
845 "Copy the file FILE into a temporary file on this machine.
846 Returns the name of the local copy, or nil, if FILE is directly
848 ;; This formerly had an optional BUFFER argument that wasn't used by
850 (let ((handler (find-file-name-handler file
'file-local-copy
)))
852 (funcall handler
'file-local-copy file
)
855 (defun file-truename (filename &optional counter prev-dirs
)
856 "Return the truename of FILENAME, which should be absolute.
857 The truename of a file name is found by chasing symbolic links
858 both at the level of the file and at the level of the directories
859 containing it, until no links are left at any level.
861 \(fn FILENAME)" ;; Don't document the optional arguments.
862 ;; COUNTER and PREV-DIRS are only used in recursive calls.
863 ;; COUNTER can be a cons cell whose car is the count of how many
864 ;; more links to chase before getting an error.
865 ;; PREV-DIRS can be a cons cell whose car is an alist
866 ;; of truenames we've just recently computed.
867 (cond ((or (string= filename
"") (string= filename
"~"))
868 (setq filename
(expand-file-name filename
))
869 (if (string= filename
"")
870 (setq filename
"/")))
871 ((and (string= (substring filename
0 1) "~")
872 (string-match "~[^/]*/?" filename
))
874 (substring filename
0 (match-end 0)))
875 (rest (substring filename
(match-end 0))))
876 (setq filename
(concat (expand-file-name first-part
) rest
)))))
878 (or counter
(setq counter
(list 100)))
880 ;; For speed, remove the ange-ftp completion handler from the list.
881 ;; We know it's not needed here.
882 ;; For even more speed, do this only on the outermost call.
883 (file-name-handler-alist
884 (if prev-dirs file-name-handler-alist
885 (let ((tem (copy-sequence file-name-handler-alist
)))
886 (delq (rassq 'ange-ftp-completion-hook-function tem
) tem
)))))
887 (or prev-dirs
(setq prev-dirs
(list nil
)))
889 ;; andrewi@harlequin.co.uk - none of the following code (except for
890 ;; invoking the file-name handler) currently applies on Windows
891 ;; (ie. there are no native symlinks), but there is an issue with
892 ;; case differences being ignored by the OS, and short "8.3 DOS"
893 ;; name aliases existing for all files. (The short names are not
894 ;; reported by directory-files, but can be used to refer to files.)
895 ;; It seems appropriate for file-truename to resolve these issues in
896 ;; the most natural way, which on Windows is to call the function
897 ;; `w32-long-file-name' - this returns the exact name of a file as
898 ;; it is stored on disk (expanding short name aliases with the full
899 ;; name in the process).
900 (if (eq system-type
'windows-nt
)
901 (let ((handler (find-file-name-handler filename
'file-truename
)))
902 ;; For file name that has a special handler, call handler.
903 ;; This is so that ange-ftp can save time by doing a no-op.
905 (setq filename
(funcall handler
'file-truename filename
))
906 ;; If filename contains a wildcard, newname will be the old name.
907 (unless (string-match "[[*?]" filename
)
908 ;; If filename exists, use the long name. If it doesn't exist,
909 ;; drill down until we find a directory that exists, and use
910 ;; the long name of that, with the extra non-existent path
911 ;; components concatenated.
912 (let ((longname (w32-long-file-name filename
))
915 (setq filename longname
)
916 ;; Include the preceding directory separator in the missing
917 ;; part so subsequent recursion on the rest works.
918 (setq missing
(concat "/" (file-name-nondirectory filename
)))
919 (let ((length (length missing
)))
921 (if (> length
(length filename
))
923 (substring filename
0 (- length
)))))
924 (setq filename
(concat (file-truename rest
) missing
))))))
927 ;; If this file directly leads to a link, process that iteratively
928 ;; so that we don't use lots of stack.
930 (setcar counter
(1- (car counter
)))
931 (if (< (car counter
) 0)
932 (error "Apparent cycle of symbolic links for %s" filename
))
933 (let ((handler (find-file-name-handler filename
'file-truename
)))
934 ;; For file name that has a special handler, call handler.
935 ;; This is so that ange-ftp can save time by doing a no-op.
937 (setq filename
(funcall handler
'file-truename filename
)
939 (let ((dir (or (file-name-directory filename
) default-directory
))
941 ;; Get the truename of the directory.
942 (setq dirfile
(directory-file-name dir
))
943 ;; If these are equal, we have the (or a) root directory.
944 (or (string= dir dirfile
)
945 ;; If this is the same dir we last got the truename for,
946 ;; save time--don't recalculate.
947 (if (assoc dir
(car prev-dirs
))
948 (setq dir
(cdr (assoc dir
(car prev-dirs
))))
950 (new (file-name-as-directory (file-truename dirfile counter prev-dirs
))))
951 (setcar prev-dirs
(cons (cons old new
) (car prev-dirs
)))
953 (if (equal ".." (file-name-nondirectory filename
))
955 (directory-file-name (file-name-directory (directory-file-name dir
)))
957 (if (equal "." (file-name-nondirectory filename
))
958 (setq filename
(directory-file-name dir
)
960 ;; Put it back on the file name.
961 (setq filename
(concat dir
(file-name-nondirectory filename
)))
962 ;; Is the file name the name of a link?
963 (setq target
(file-symlink-p filename
))
965 ;; Yes => chase that link, then start all over
966 ;; since the link may point to a directory name that uses links.
967 ;; We can't safely use expand-file-name here
968 ;; since target might look like foo/../bar where foo
969 ;; is itself a link. Instead, we handle . and .. above.
971 (if (file-name-absolute-p target
)
979 (defun file-chase-links (filename &optional limit
)
980 "Chase links in FILENAME until a name that is not a link.
981 Unlike `file-truename', this does not check whether a parent
982 directory name is a symbolic link.
983 If the optional argument LIMIT is a number,
984 it means chase no more than that many links and then stop."
985 (let (tem (newname filename
)
987 (while (and (or (null limit
) (< count limit
))
988 (setq tem
(file-symlink-p newname
)))
990 (if (and (null limit
) (= count
100))
991 (error "Apparent cycle of symbolic links for %s" filename
))
992 ;; In the context of a link, `//' doesn't mean what Emacs thinks.
993 (while (string-match "//+" tem
)
994 (setq tem
(replace-match "/" nil nil tem
)))
995 ;; Handle `..' by hand, since it needs to work in the
996 ;; target of any directory symlink.
997 ;; This code is not quite complete; it does not handle
998 ;; embedded .. in some cases such as ./../foo and foo/bar/../../../lose.
999 (while (string-match "\\`\\.\\./" tem
)
1000 (setq tem
(substring tem
3))
1001 (setq newname
(expand-file-name newname
))
1002 ;; Chase links in the default dir of the symlink.
1005 (directory-file-name (file-name-directory newname
))))
1006 ;; Now find the parent of that dir.
1007 (setq newname
(file-name-directory newname
)))
1008 (setq newname
(expand-file-name tem
(file-name-directory newname
)))
1009 (setq count
(1+ count
))))
1012 (defun make-temp-file (prefix &optional dir-flag suffix
)
1013 "Create a temporary file.
1014 The returned file name (created by appending some random characters at the end
1015 of PREFIX, and expanding against `temporary-file-directory' if necessary),
1016 is guaranteed to point to a newly created empty file.
1017 You can then use `write-region' to write new data into the file.
1019 If DIR-FLAG is non-nil, create a new empty directory instead of a file.
1021 If SUFFIX is non-nil, add that at the end of the file name."
1022 (let ((umask (default-file-modes))
1026 ;; Create temp files with strict access rights. It's easy to
1027 ;; loosen them later, whereas it's impossible to close the
1028 ;; time-window of loose permissions otherwise.
1029 (set-default-file-modes ?
\700)
1030 (while (condition-case ()
1034 (if (zerop (length prefix
))
1035 (file-name-as-directory
1036 temporary-file-directory
)
1037 (expand-file-name prefix
1038 temporary-file-directory
))))
1040 (setq file
(concat file suffix
)))
1042 (make-directory file
)
1043 (write-region "" nil file nil
'silent nil
'excl
))
1045 (file-already-exists t
))
1046 ;; the file was somehow created by someone else between
1047 ;; `make-temp-name' and `write-region', let's try again.
1051 (set-default-file-modes umask
))))
1053 (defun recode-file-name (file coding new-coding
&optional ok-if-already-exists
)
1054 "Change the encoding of FILE's name from CODING to NEW-CODING.
1055 The value is a new name of FILE.
1056 Signals a `file-already-exists' error if a file of the new name
1057 already exists unless optional fourth argument OK-IF-ALREADY-EXISTS
1058 is non-nil. A number as fourth arg means request confirmation if
1059 the new name already exists. This is what happens in interactive
1062 (let ((default-coding (or file-name-coding-system
1063 default-file-name-coding-system
))
1064 (filename (read-file-name "Recode filename: " nil nil t
))
1065 from-coding to-coding
)
1066 (if (and default-coding
1067 ;; We provide the default coding only when it seems that
1068 ;; the filename is correctly decoded by the default
1070 (let ((charsets (find-charset-string filename
)))
1071 (and (not (memq 'eight-bit-control charsets
))
1072 (not (memq 'eight-bit-graphic charsets
)))))
1073 (setq from-coding
(read-coding-system
1074 (format "Recode filename %s from (default %s): "
1075 filename default-coding
)
1077 (setq from-coding
(read-coding-system
1078 (format "Recode filename %s from: " filename
))))
1080 ;; We provide the default coding only when a user is going to
1081 ;; change the encoding not from the default coding.
1082 (if (eq from-coding default-coding
)
1083 (setq to-coding
(read-coding-system
1084 (format "Recode filename %s from %s to: "
1085 filename from-coding
)))
1086 (setq to-coding
(read-coding-system
1087 (format "Recode filename %s from %s to (default %s): "
1088 filename from-coding default-coding
)
1090 (list filename from-coding to-coding
)))
1092 (let* ((default-coding (or file-name-coding-system
1093 default-file-name-coding-system
))
1094 ;; FILE should have been decoded by DEFAULT-CODING.
1095 (encoded (encode-coding-string file default-coding
))
1096 (newname (decode-coding-string encoded coding
))
1097 (new-encoded (encode-coding-string newname new-coding
))
1098 ;; Suppress further encoding.
1099 (file-name-coding-system nil
)
1100 (default-file-name-coding-system nil
)
1101 (locale-coding-system nil
))
1102 (rename-file encoded new-encoded ok-if-already-exists
)
1105 (defcustom confirm-nonexistent-file-or-buffer t
1106 "If non-nil, confirmation is requested before visiting a new file or buffer.
1107 This affects commands like `switch-to-buffer' and `find-file'."
1112 (defun read-buffer-to-switch (prompt)
1113 "Read the name of a buffer to switch to and return as a string.
1114 It is intended for `switch-to-buffer' family of commands since they
1115 need to omit the name of current buffer from the list of completions
1116 and default values."
1117 (let ((rbts-completion-table (internal-complete-buffer-except)))
1118 (minibuffer-with-setup-hook
1119 (lambda () (setq minibuffer-completion-table rbts-completion-table
))
1120 (read-buffer prompt
(other-buffer (current-buffer))
1121 (if confirm-nonexistent-file-or-buffer
'confirm-only
)))))
1123 (defun switch-to-buffer-other-window (buffer &optional norecord
)
1124 "Select buffer BUFFER in another window.
1125 If BUFFER does not identify an existing buffer, then this function
1126 creates a buffer with that name.
1128 When called from Lisp, BUFFER can be a buffer, a string \(a buffer name),
1129 or nil. If BUFFER is nil, then this function chooses a buffer
1130 using `other-buffer'.
1131 Optional second arg NORECORD non-nil means do not put this
1132 buffer at the front of the list of recently selected ones.
1133 This function returns the buffer it switched to.
1135 This uses the function `display-buffer' as a subroutine; see its
1136 documentation for additional customization information."
1138 (list (read-buffer-to-switch "Switch to buffer in other window: ")))
1139 (let ((pop-up-windows t
)
1140 ;; Don't let these interfere.
1141 same-window-buffer-names same-window-regexps
)
1142 (pop-to-buffer buffer t norecord
)))
1144 (defun switch-to-buffer-other-frame (buffer &optional norecord
)
1145 "Switch to buffer BUFFER in another frame.
1146 Optional second arg NORECORD non-nil means do not put this
1147 buffer at the front of the list of recently selected ones.
1148 This function returns the buffer it switched to.
1150 This uses the function `display-buffer' as a subroutine; see
1151 its documentation for additional customization information."
1153 (list (read-buffer-to-switch "Switch to buffer in other frame: ")))
1154 (let ((pop-up-frames t
)
1155 same-window-buffer-names same-window-regexps
)
1156 (pop-to-buffer buffer t norecord
)))
1158 (defun display-buffer-other-frame (buffer)
1159 "Display buffer BUFFER in another frame.
1160 This uses the function `display-buffer' as a subroutine; see
1161 its documentation for additional customization information."
1162 (interactive "BDisplay buffer in other frame: ")
1163 (let ((pop-up-frames t
)
1164 same-window-buffer-names same-window-regexps
1165 (old-window (selected-window))
1167 (setq new-window
(display-buffer buffer t
))
1168 ;; This may have been here in order to prevent the new frame from hiding
1169 ;; the old frame. But it does more harm than good.
1170 ;; Maybe we should call `raise-window' on the old-frame instead? --Stef
1171 ;;(lower-frame (window-frame new-window))
1173 ;; This may have been here in order to make sure the old-frame gets the
1174 ;; focus. But not only can it cause an annoying flicker, with some
1175 ;; window-managers it just makes the window invisible, with no easy
1176 ;; way to recover it. --Stef
1177 ;;(make-frame-invisible (window-frame old-window))
1178 ;;(make-frame-visible (window-frame old-window))
1181 (defvar find-file-default nil
1182 "Used within `find-file-read-args'.")
1184 (defmacro minibuffer-with-setup-hook
(fun &rest body
)
1185 "Add FUN to `minibuffer-setup-hook' while executing BODY.
1186 BODY should use the minibuffer at most once.
1187 Recursive uses of the minibuffer will not be affected."
1188 (declare (indent 1) (debug t
))
1189 (let ((hook (make-symbol "setup-hook")))
1193 ;; Clear out this hook so it does not interfere
1194 ;; with any recursive minibuffer usage.
1195 (remove-hook 'minibuffer-setup-hook
,hook
)
1199 (add-hook 'minibuffer-setup-hook
,hook
)
1201 (remove-hook 'minibuffer-setup-hook
,hook
)))))
1203 (defun find-file-read-args (prompt mustmatch
)
1204 (list (let ((find-file-default
1205 (and buffer-file-name
1206 (abbreviate-file-name buffer-file-name
))))
1207 (minibuffer-with-setup-hook
1208 (lambda () (setq minibuffer-default find-file-default
))
1209 (read-file-name prompt nil default-directory mustmatch
)))
1212 (defun find-file (filename &optional wildcards
)
1213 "Edit file FILENAME.
1214 Switch to a buffer visiting file FILENAME,
1215 creating one if none already exists.
1216 Interactively, the default if you just type RET is the current directory,
1217 but the visited file name is available through the minibuffer history:
1218 type M-n to pull it into the minibuffer.
1220 You can visit files on remote machines by specifying something
1221 like /ssh:SOME_REMOTE_MACHINE:FILE for the file name. You can
1222 also visit local files as a different user by specifying
1223 /sudo::FILE for the file name.
1224 See the Info node `(tramp)Filename Syntax' in the Tramp Info
1225 manual, for more about this.
1227 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1228 expand wildcards (if any) and visit multiple files. You can
1229 suppress wildcard expansion by setting `find-file-wildcards' to nil.
1231 To visit a file without any kind of conversion and without
1232 automatically choosing a major mode, use \\[find-file-literally]."
1234 (find-file-read-args "Find file: "
1235 (if confirm-nonexistent-file-or-buffer
'confirm-only
)))
1236 (let ((value (find-file-noselect filename nil nil wildcards
)))
1238 (mapcar 'switch-to-buffer
(nreverse value
))
1239 (switch-to-buffer value
))))
1241 (defun find-file-other-window (filename &optional wildcards
)
1242 "Edit file FILENAME, in another window.
1244 Like \\[find-file] (which see), but creates a new window or reuses
1245 an existing one. See the function `display-buffer'.
1247 Interactively, the default if you just type RET is the current directory,
1248 but the visited file name is available through the minibuffer history:
1249 type M-n to pull it into the minibuffer.
1251 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1252 expand wildcards (if any) and visit multiple files."
1254 (find-file-read-args "Find file in other window: "
1255 (if confirm-nonexistent-file-or-buffer
'confirm-only
)))
1256 (let ((value (find-file-noselect filename nil nil wildcards
)))
1259 (setq value
(nreverse value
))
1260 (cons (switch-to-buffer-other-window (car value
))
1261 (mapcar 'switch-to-buffer
(cdr value
))))
1262 (switch-to-buffer-other-window value
))))
1264 (defun find-file-other-frame (filename &optional wildcards
)
1265 "Edit file FILENAME, in another frame.
1267 Like \\[find-file] (which see), but creates a new frame or reuses
1268 an existing one. See the function `display-buffer'.
1270 Interactively, the default if you just type RET is the current directory,
1271 but the visited file name is available through the minibuffer history:
1272 type M-n to pull it into the minibuffer.
1274 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1275 expand wildcards (if any) and visit multiple files."
1277 (find-file-read-args "Find file in other frame: "
1278 (if confirm-nonexistent-file-or-buffer
'confirm-only
)))
1279 (let ((value (find-file-noselect filename nil nil wildcards
)))
1282 (setq value
(nreverse value
))
1283 (cons (switch-to-buffer-other-frame (car value
))
1284 (mapcar 'switch-to-buffer
(cdr value
))))
1285 (switch-to-buffer-other-frame value
))))
1287 (defun find-file-existing (filename)
1288 "Edit the existing file FILENAME.
1289 Like \\[find-file], but only allow a file that exists, and do not allow
1290 file names with wildcards."
1291 (interactive (nbutlast (find-file-read-args "Find existing file: " t
)))
1292 (if (and (not (interactive-p)) (not (file-exists-p filename
)))
1293 (error "%s does not exist" filename
)
1294 (find-file filename
)
1297 (defun find-file-read-only (filename &optional wildcards
)
1298 "Edit file FILENAME but don't allow changes.
1299 Like \\[find-file], but marks buffer as read-only.
1300 Use \\[toggle-read-only] to permit editing."
1302 (find-file-read-args "Find file read-only: "
1303 (if confirm-nonexistent-file-or-buffer
'confirm-only
)))
1304 (unless (or (and wildcards find-file-wildcards
1305 (not (string-match "\\`/:" filename
))
1306 (string-match "[[*?]" filename
))
1307 (file-exists-p filename
))
1308 (error "%s does not exist" filename
))
1309 (let ((value (find-file filename wildcards
)))
1310 (mapc (lambda (b) (with-current-buffer b
(toggle-read-only 1)))
1311 (if (listp value
) value
(list value
)))
1314 (defun find-file-read-only-other-window (filename &optional wildcards
)
1315 "Edit file FILENAME in another window but don't allow changes.
1316 Like \\[find-file-other-window], but marks buffer as read-only.
1317 Use \\[toggle-read-only] to permit editing."
1319 (find-file-read-args "Find file read-only other window: "
1320 (if confirm-nonexistent-file-or-buffer
'confirm-only
)))
1321 (unless (or (and wildcards find-file-wildcards
1322 (not (string-match "\\`/:" filename
))
1323 (string-match "[[*?]" filename
))
1324 (file-exists-p filename
))
1325 (error "%s does not exist" filename
))
1326 (let ((value (find-file-other-window filename wildcards
)))
1327 (mapc (lambda (b) (with-current-buffer b
(toggle-read-only 1)))
1328 (if (listp value
) value
(list value
)))
1331 (defun find-file-read-only-other-frame (filename &optional wildcards
)
1332 "Edit file FILENAME in another frame but don't allow changes.
1333 Like \\[find-file-other-frame], but marks buffer as read-only.
1334 Use \\[toggle-read-only] to permit editing."
1336 (find-file-read-args "Find file read-only other frame: "
1337 (if confirm-nonexistent-file-or-buffer
'confirm-only
)))
1338 (unless (or (and wildcards find-file-wildcards
1339 (not (string-match "\\`/:" filename
))
1340 (string-match "[[*?]" filename
))
1341 (file-exists-p filename
))
1342 (error "%s does not exist" filename
))
1343 (let ((value (find-file-other-frame filename wildcards
)))
1344 (mapc (lambda (b) (with-current-buffer b
(toggle-read-only 1)))
1345 (if (listp value
) value
(list value
)))
1348 (defun find-alternate-file-other-window (filename &optional wildcards
)
1349 "Find file FILENAME as a replacement for the file in the next window.
1350 This command does not select that window.
1352 See \\[find-file] for the possible forms of the FILENAME argument.
1354 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1355 expand wildcards (if any) and replace the file with multiple files."
1357 (save-selected-window
1359 (let ((file buffer-file-name
)
1363 (setq file-name
(file-name-nondirectory file
)
1364 file-dir
(file-name-directory file
)))
1365 (list (read-file-name
1366 "Find alternate file: " file-dir nil nil file-name
)
1369 (find-file-other-window filename wildcards
)
1370 (save-selected-window
1372 (find-alternate-file filename wildcards
))))
1374 (defun find-alternate-file (filename &optional wildcards
)
1375 "Find file FILENAME, select its buffer, kill previous buffer.
1376 If the current buffer now contains an empty file that you just visited
1377 \(presumably by mistake), use this command to visit the file you really want.
1379 See \\[find-file] for the possible forms of the FILENAME argument.
1381 Interactively, or if WILDCARDS is non-nil in a call from Lisp,
1382 expand wildcards (if any) and replace the file with multiple files.
1384 If the current buffer is an indirect buffer, or the base buffer
1385 for one or more indirect buffers, the other buffer(s) are not
1388 (let ((file buffer-file-name
)
1392 (setq file-name
(file-name-nondirectory file
)
1393 file-dir
(file-name-directory file
)))
1394 (list (read-file-name
1395 "Find alternate file: " file-dir nil nil file-name
)
1397 (unless (run-hook-with-args-until-failure 'kill-buffer-query-functions
)
1399 (when (and (buffer-modified-p) (buffer-file-name))
1400 (if (yes-or-no-p (format "Buffer %s is modified; kill anyway? "
1402 (unless (yes-or-no-p "Kill and replace the buffer without saving it? ")
1405 (let ((obuf (current-buffer))
1406 (ofile buffer-file-name
)
1407 (onum buffer-file-number
)
1408 (odir dired-directory
)
1409 (otrue buffer-file-truename
)
1410 (oname (buffer-name)))
1411 (if (get-buffer " **lose**")
1412 (kill-buffer " **lose**"))
1413 (rename-buffer " **lose**")
1417 ;; This prevents us from finding the same buffer
1418 ;; if we specified the same file again.
1419 (setq buffer-file-name nil
)
1420 (setq buffer-file-number nil
)
1421 (setq buffer-file-truename nil
)
1422 ;; Likewise for dired buffers.
1423 (setq dired-directory nil
)
1424 (find-file filename wildcards
))
1425 (when (eq obuf
(current-buffer))
1426 ;; This executes if find-file gets an error
1427 ;; and does not really find anything.
1428 ;; We put things back as they were.
1429 ;; If find-file actually finds something, we kill obuf below.
1430 (setq buffer-file-name ofile
)
1431 (setq buffer-file-number onum
)
1432 (setq buffer-file-truename otrue
)
1433 (setq dired-directory odir
)
1435 (rename-buffer oname
)))
1436 (unless (eq (current-buffer) obuf
)
1437 (with-current-buffer obuf
1438 ;; We already asked; don't ask again.
1439 (let ((kill-buffer-query-functions))
1440 (kill-buffer obuf
))))))
1442 (defun create-file-buffer (filename)
1443 "Create a suitably named buffer for visiting FILENAME, and return it.
1444 FILENAME (sans directory) is used unchanged if that name is free;
1445 otherwise a string <2> or <3> or ... is appended to get an unused name.
1446 Spaces at the start of FILENAME (sans directory) are removed."
1447 (let ((lastname (file-name-nondirectory filename
)))
1448 (if (string= lastname
"")
1449 (setq lastname filename
))
1451 (string-match "^ *\\(.*\\)" lastname
)
1452 (generate-new-buffer (match-string 1 lastname
)))))
1454 (defun generate-new-buffer (name)
1455 "Create and return a buffer with a name based on NAME.
1456 Choose the buffer's name using `generate-new-buffer-name'."
1457 (get-buffer-create (generate-new-buffer-name name
)))
1459 (defcustom automount-dir-prefix
"^/tmp_mnt/"
1460 "Regexp to match the automounter prefix in a directory name."
1464 (defvar abbreviated-home-dir nil
1465 "The user's homedir abbreviated according to `directory-abbrev-alist'.")
1467 (defun abbreviate-file-name (filename)
1468 "Return a version of FILENAME shortened using `directory-abbrev-alist'.
1469 This also substitutes \"~\" for the user's home directory (unless the
1470 home directory is a root directory) and removes automounter prefixes
1471 \(see the variable `automount-dir-prefix')."
1472 ;; Get rid of the prefixes added by the automounter.
1474 (if (and automount-dir-prefix
1475 (string-match automount-dir-prefix filename
)
1476 (file-exists-p (file-name-directory
1477 (substring filename
(1- (match-end 0))))))
1478 (setq filename
(substring filename
(1- (match-end 0)))))
1479 ;; Avoid treating /home/foo as /home/Foo during `~' substitution.
1480 ;; To fix this right, we need a `file-name-case-sensitive-p'
1481 ;; function, but we don't have that yet, so just guess.
1482 (let ((case-fold-search
1483 (memq system-type
'(ms-dos windows-nt darwin cygwin
))))
1484 ;; If any elt of directory-abbrev-alist matches this name,
1485 ;; abbreviate accordingly.
1486 (dolist (dir-abbrev directory-abbrev-alist
)
1487 (if (string-match (car dir-abbrev
) filename
)
1489 (concat (cdr dir-abbrev
)
1490 (substring filename
(match-end 0))))))
1491 ;; Compute and save the abbreviated homedir name.
1492 ;; We defer computing this until the first time it's needed, to
1493 ;; give time for directory-abbrev-alist to be set properly.
1494 ;; We include a slash at the end, to avoid spurious matches
1495 ;; such as `/usr/foobar' when the home dir is `/usr/foo'.
1496 (or abbreviated-home-dir
1497 (setq abbreviated-home-dir
1498 (let ((abbreviated-home-dir "$foo"))
1499 (concat "^" (abbreviate-file-name (expand-file-name "~"))
1502 ;; If FILENAME starts with the abbreviated homedir,
1503 ;; make it start with `~' instead.
1504 (if (and (string-match abbreviated-home-dir filename
)
1505 ;; If the home dir is just /, don't change it.
1506 (not (and (= (match-end 0) 1)
1507 (= (aref filename
0) ?
/)))
1508 ;; MS-DOS root directories can come with a drive letter;
1509 ;; Novell Netware allows drive letters beyond `Z:'.
1510 (not (and (or (eq system-type
'ms-dos
)
1511 (eq system-type
'cygwin
)
1512 (eq system-type
'windows-nt
))
1514 (string-match "^[a-zA-`]:/$" filename
)))))
1517 (match-string 1 filename
)
1518 (substring filename
(match-end 0)))))
1521 (defcustom find-file-not-true-dirname-list nil
1522 "List of logical names for which visiting shouldn't save the true dirname."
1523 :type
'(repeat (string :tag
"Name"))
1526 (defun find-buffer-visiting (filename &optional predicate
)
1527 "Return the buffer visiting file FILENAME (a string).
1528 This is like `get-file-buffer', except that it checks for any buffer
1529 visiting the same file, possibly under a different name.
1530 If PREDICATE is non-nil, only buffers satisfying it are eligible,
1531 and others are ignored.
1532 If there is no such live buffer, return nil."
1533 (let ((predicate (or predicate
#'identity
))
1534 (truename (abbreviate-file-name (file-truename filename
))))
1535 (or (let ((buf (get-file-buffer filename
)))
1536 (when (and buf
(funcall predicate buf
)) buf
))
1537 (let ((list (buffer-list)) found
)
1538 (while (and (not found
) list
)
1540 (set-buffer (car list
))
1541 (if (and buffer-file-name
1542 (string= buffer-file-truename truename
)
1543 (funcall predicate
(current-buffer)))
1544 (setq found
(car list
))))
1545 (setq list
(cdr list
)))
1547 (let* ((attributes (file-attributes truename
))
1548 (number (nthcdr 10 attributes
))
1549 (list (buffer-list)) found
)
1550 (and buffer-file-numbers-unique
1551 (car-safe number
) ;Make sure the inode is not just nil.
1552 (while (and (not found
) list
)
1553 (with-current-buffer (car list
)
1554 (if (and buffer-file-name
1555 (equal buffer-file-number number
)
1556 ;; Verify this buffer's file number
1557 ;; still belongs to its file.
1558 (file-exists-p buffer-file-name
)
1559 (equal (file-attributes buffer-file-truename
)
1561 (funcall predicate
(current-buffer)))
1562 (setq found
(car list
))))
1563 (setq list
(cdr list
))))
1566 (defcustom find-file-wildcards t
1567 "Non-nil means file-visiting commands should handle wildcards.
1568 For example, if you specify `*.c', that would visit all the files
1569 whose names match the pattern."
1574 (defcustom find-file-suppress-same-file-warnings nil
1575 "Non-nil means suppress warning messages for symlinked files.
1576 When nil, Emacs prints a warning when visiting a file that is already
1577 visited, but with a different name. Setting this option to t
1578 suppresses this warning."
1583 (defcustom large-file-warning-threshold
10000000
1584 "Maximum size of file above which a confirmation is requested.
1585 When nil, never request confirmation."
1589 :type
'(choice integer
(const :tag
"Never request confirmation" nil
)))
1591 (defun abort-if-file-too-large (size op-type
)
1592 "If file SIZE larger than `large-file-warning-threshold', allow user to abort.
1593 OP-TYPE specifies the file operation being performed (for message to user)."
1594 (when (and large-file-warning-threshold size
1595 (> size large-file-warning-threshold
)
1597 (format "File %s is large (%dMB), really %s? "
1598 (file-name-nondirectory filename
)
1599 (/ size
1048576) op-type
))))
1602 (defun find-file-noselect (filename &optional nowarn rawfile wildcards
)
1603 "Read file FILENAME into a buffer and return the buffer.
1604 If a buffer exists visiting FILENAME, return that one, but
1605 verify that the file has not changed since visited or saved.
1606 The buffer is not selected, just returned to the caller.
1607 Optional second arg NOWARN non-nil means suppress any warning messages.
1608 Optional third arg RAWFILE non-nil means the file is read literally.
1609 Optional fourth arg WILDCARDS non-nil means do wildcard processing
1610 and visit all the matching files. When wildcards are actually
1611 used and expanded, return a list of buffers that are visiting
1614 (abbreviate-file-name
1615 (expand-file-name filename
)))
1616 (if (file-directory-p filename
)
1617 (or (and find-file-run-dired
1618 (run-hook-with-args-until-success
1619 'find-directory-functions
1620 (if find-file-visit-truename
1621 (abbreviate-file-name (file-truename filename
))
1623 (error "%s is a directory" filename
))
1626 (not (string-match "\\`/:" filename
))
1627 (string-match "[[*?]" filename
))
1628 (let ((files (condition-case nil
1629 (file-expand-wildcards filename t
)
1630 (error (list filename
))))
1631 (find-file-wildcards nil
))
1633 (find-file-noselect filename
)
1634 (mapcar #'find-file-noselect files
)))
1635 (let* ((buf (get-file-buffer filename
))
1636 (truename (abbreviate-file-name (file-truename filename
)))
1637 (attributes (file-attributes truename
))
1638 (number (nthcdr 10 attributes
))
1639 ;; Find any buffer for a file which has same truename.
1640 (other (and (not buf
) (find-buffer-visiting filename
))))
1641 ;; Let user know if there is a buffer with the same truename.
1645 find-file-suppress-same-file-warnings
1646 (string-equal filename
(buffer-file-name other
))
1647 (message "%s and %s are the same file"
1648 filename
(buffer-file-name other
)))
1649 ;; Optionally also find that buffer.
1650 (if (or find-file-existing-other-name find-file-visit-truename
)
1652 ;; Check to see if the file looks uncommonly large.
1653 (when (not (or buf nowarn
))
1654 (abort-if-file-too-large (nth 7 attributes
) "open"))
1656 ;; We are using an existing buffer.
1659 (verify-visited-file-modtime buf
)
1660 (cond ((not (file-exists-p filename
))
1661 (setq nonexistent t
)
1662 (message "File %s no longer exists!" filename
))
1663 ;; Certain files should be reverted automatically
1664 ;; if they have changed on disk and not in the buffer.
1665 ((and (not (buffer-modified-p buf
))
1666 (let ((tail revert-without-query
)
1669 (if (string-match (car tail
) filename
)
1671 (setq tail
(cdr tail
)))
1673 (with-current-buffer buf
1674 (message "Reverting file %s..." filename
)
1676 (message "Reverting file %s...done" filename
)))
1678 (if (string= (file-name-nondirectory filename
)
1681 (if (buffer-modified-p buf
)
1682 "File %s changed on disk. Discard your edits? "
1683 "File %s changed on disk. Reread from disk? ")
1684 (file-name-nondirectory filename
))
1686 (if (buffer-modified-p buf
)
1687 "File %s changed on disk. Discard your edits in %s? "
1688 "File %s changed on disk. Reread from disk into %s? ")
1689 (file-name-nondirectory filename
)
1690 (buffer-name buf
))))
1691 (with-current-buffer buf
1692 (revert-buffer t t
)))))
1693 (with-current-buffer buf
1695 ;; Check if a formerly read-only file has become
1696 ;; writable and vice versa, but if the buffer agrees
1697 ;; with the new state of the file, that is ok too.
1698 (let ((read-only (not (file-writable-p buffer-file-name
))))
1699 (unless (or nonexistent
1700 (eq read-only buffer-file-read-only
)
1701 (eq read-only buffer-read-only
))
1704 (format "File %s is %s on disk. Change buffer mode? "
1706 (if read-only
"read-only" "writable"))))
1707 (y-or-n-p question
)))
1708 (setq buffer-read-only read-only
)))
1709 (setq buffer-file-read-only read-only
))
1711 (when (and (not (eq (not (null rawfile
))
1712 (not (null find-file-literally
))))
1714 ;; It is confusing to ask whether to visit
1715 ;; non-literally if they have the file in
1717 (not (eq major-mode
'hexl-mode
)))
1718 (if (buffer-modified-p)
1722 "The file %s is already visited normally,
1723 and you have edited the buffer. Now you have asked to visit it literally,
1724 meaning no coding system handling, format conversion, or local variables.
1725 Emacs can only visit a file in one way at a time.
1727 Do you want to save the file, and visit it literally instead? "
1728 "The file %s is already visited literally,
1729 meaning no coding system handling, format conversion, or local variables.
1730 You have edited the buffer. Now you have asked to visit the file normally,
1731 but Emacs can only visit a file in one way at a time.
1733 Do you want to save the file, and visit it normally instead? ")
1734 (file-name-nondirectory filename
)))
1737 (find-file-noselect-1 buf filename nowarn
1738 rawfile truename number
))
1743 Do you want to discard your changes, and visit the file literally now? "
1745 Do you want to discard your changes, and visit the file normally now? ")))
1746 (find-file-noselect-1 buf filename nowarn
1747 rawfile truename number
)
1748 (error (if rawfile
"File already visited non-literally"
1749 "File already visited literally"))))
1753 "The file %s is already visited normally.
1754 You have asked to visit it literally,
1755 meaning no coding system decoding, format conversion, or local variables.
1756 But Emacs can only visit a file in one way at a time.
1758 Do you want to revisit the file literally now? "
1759 "The file %s is already visited literally,
1760 meaning no coding system decoding, format conversion, or local variables.
1761 You have asked to visit it normally,
1762 but Emacs can only visit a file in one way at a time.
1764 Do you want to revisit the file normally now? ")
1765 (file-name-nondirectory filename
)))
1766 (find-file-noselect-1 buf filename nowarn
1767 rawfile truename number
)
1768 (error (if rawfile
"File already visited non-literally"
1769 "File already visited literally"))))))
1770 ;; Return the buffer we are using.
1772 ;; Create a new buffer.
1773 (setq buf
(create-file-buffer filename
))
1774 ;; find-file-noselect-1 may use a different buffer.
1775 (find-file-noselect-1 buf filename nowarn
1776 rawfile truename number
))))))
1778 (defun find-file-noselect-1 (buf filename nowarn rawfile truename number
)
1780 (with-current-buffer buf
1781 (kill-local-variable 'find-file-literally
)
1782 ;; Needed in case we are re-visiting the file with a different
1783 ;; text representation.
1784 (kill-local-variable 'buffer-file-coding-system
)
1785 (kill-local-variable 'cursor-type
)
1786 (let ((inhibit-read-only t
))
1788 (and (default-value 'enable-multibyte-characters
)
1790 (set-buffer-multibyte t
))
1793 (let ((inhibit-read-only t
))
1794 (insert-file-contents-literally filename t
))
1796 (when (and (file-exists-p filename
)
1797 (not (file-readable-p filename
)))
1799 (signal 'file-error
(list "File is not readable"
1801 ;; Unconditionally set error
1804 (let ((inhibit-read-only t
))
1805 (insert-file-contents filename t
))
1807 (when (and (file-exists-p filename
)
1808 (not (file-readable-p filename
)))
1810 (signal 'file-error
(list "File is not readable"
1812 ;; Run find-file-not-found-functions until one returns non-nil.
1813 (or (run-hook-with-args-until-success 'find-file-not-found-functions
)
1814 ;; If they fail too, set error.
1816 ;; Record the file's truename, and maybe use that as visited name.
1817 (if (equal filename buffer-file-name
)
1818 (setq buffer-file-truename truename
)
1819 (setq buffer-file-truename
1820 (abbreviate-file-name (file-truename buffer-file-name
))))
1821 (setq buffer-file-number number
)
1822 (if find-file-visit-truename
1823 (setq buffer-file-name
(expand-file-name buffer-file-truename
)))
1824 ;; Set buffer's default directory to that of the file.
1825 (setq default-directory
(file-name-directory buffer-file-name
))
1826 ;; Turn off backup files for certain file names. Since
1827 ;; this is a permanent local, the major mode won't eliminate it.
1828 (and backup-enable-predicate
1829 (not (funcall backup-enable-predicate buffer-file-name
))
1831 (make-local-variable 'backup-inhibited
)
1832 (setq backup-inhibited t
)))
1835 (set-buffer-multibyte nil
)
1836 (setq buffer-file-coding-system
'no-conversion
)
1837 (set-buffer-major-mode buf
)
1838 (make-local-variable 'find-file-literally
)
1839 (setq find-file-literally t
))
1840 (after-find-file error
(not nowarn
)))
1843 (defun insert-file-contents-literally (filename &optional visit beg end replace
)
1844 "Like `insert-file-contents', but only reads in the file literally.
1845 A buffer may be modified in several ways after reading into the buffer,
1846 to Emacs features such as format decoding, character code
1847 conversion, `find-file-hook', automatic uncompression, etc.
1849 This function ensures that none of these modifications will take place."
1850 (let ((format-alist nil
)
1851 (after-insert-file-functions nil
)
1852 (coding-system-for-read 'no-conversion
)
1853 (coding-system-for-write 'no-conversion
)
1854 (find-buffer-file-type-function
1855 (if (fboundp 'find-buffer-file-type
)
1856 (symbol-function 'find-buffer-file-type
)
1858 (inhibit-file-name-handlers
1859 (append '(jka-compr-handler image-file-handler epa-file-handler
)
1860 inhibit-file-name-handlers
))
1861 (inhibit-file-name-operation 'insert-file-contents
))
1864 (fset 'find-buffer-file-type
(lambda (filename) t
))
1865 (insert-file-contents filename visit beg end replace
))
1866 (if find-buffer-file-type-function
1867 (fset 'find-buffer-file-type find-buffer-file-type-function
)
1868 (fmakunbound 'find-buffer-file-type
)))))
1870 (defun insert-file-1 (filename insert-func
)
1871 (if (file-directory-p filename
)
1872 (signal 'file-error
(list "Opening input file" "file is a directory"
1874 ;; Check whether the file is uncommonly large
1875 (abort-if-file-too-large (nth 7 (file-attributes filename
)) "insert")
1876 (let* ((buffer (find-buffer-visiting (abbreviate-file-name (file-truename filename
))
1877 #'buffer-modified-p
))
1878 (tem (funcall insert-func filename
)))
1879 (push-mark (+ (point) (car (cdr tem
))))
1881 (message "File %s already visited and modified in buffer %s"
1882 filename
(buffer-name buffer
)))))
1884 (defun insert-file-literally (filename)
1885 "Insert contents of file FILENAME into buffer after point with no conversion.
1887 This function is meant for the user to run interactively.
1888 Don't call it from programs! Use `insert-file-contents-literally' instead.
1889 \(Its calling sequence is different; see its documentation)."
1890 (interactive "*fInsert file literally: ")
1891 (insert-file-1 filename
#'insert-file-contents-literally
))
1893 (defvar find-file-literally nil
1894 "Non-nil if this buffer was made by `find-file-literally' or equivalent.
1895 This is a permanent local.")
1896 (put 'find-file-literally
'permanent-local t
)
1898 (defun find-file-literally (filename)
1899 "Visit file FILENAME with no conversion of any kind.
1900 Format conversion and character code conversion are both disabled,
1901 and multibyte characters are disabled in the resulting buffer.
1902 The major mode used is Fundamental mode regardless of the file name,
1903 and local variable specifications in the file are ignored.
1904 Automatic uncompression and adding a newline at the end of the
1905 file due to `require-final-newline' is also disabled.
1907 You cannot absolutely rely on this function to result in
1908 visiting the file literally. If Emacs already has a buffer
1909 which is visiting the file, you get the existing buffer,
1910 regardless of whether it was created literally or not.
1912 In a Lisp program, if you want to be sure of accessing a file's
1913 contents literally, you should create a temporary buffer and then read
1914 the file contents into it using `insert-file-contents-literally'."
1915 (interactive "FFind file literally: ")
1916 (switch-to-buffer (find-file-noselect filename nil t
)))
1918 (defvar after-find-file-from-revert-buffer nil
)
1920 (defun after-find-file (&optional error warn noauto
1921 after-find-file-from-revert-buffer
1923 "Called after finding a file and by the default revert function.
1924 Sets buffer mode, parses local variables.
1925 Optional args ERROR, WARN, and NOAUTO: ERROR non-nil means there was an
1926 error in reading the file. WARN non-nil means warn if there
1927 exists an auto-save file more recent than the visited file.
1928 NOAUTO means don't mess with auto-save mode.
1929 Fourth arg AFTER-FIND-FILE-FROM-REVERT-BUFFER non-nil
1930 means this call was from `revert-buffer'.
1931 Fifth arg NOMODES non-nil means don't alter the file's modes.
1932 Finishes by calling the functions in `find-file-hook'
1933 unless NOMODES is non-nil."
1934 (setq buffer-read-only
(not (file-writable-p buffer-file-name
)))
1941 ((and error
(file-attributes buffer-file-name
))
1942 (setq buffer-read-only t
)
1943 "File exists, but cannot be read")
1944 ((not buffer-read-only
)
1946 ;; No need to warn if buffer is auto-saved
1947 ;; under the name of the visited file.
1948 (not (and buffer-file-name
1949 auto-save-visited-file-name
))
1950 (file-newer-than-file-p (or buffer-auto-save-file-name
1951 (make-auto-save-file-name))
1953 (format "%s has auto save data; consider M-x recover-this-file"
1954 (file-name-nondirectory buffer-file-name
))
1955 (setq not-serious t
)
1956 (if error
"(New file)" nil
)))
1958 (setq not-serious t
)
1959 "Note: file is write protected")
1960 ((file-attributes (directory-file-name default-directory
))
1961 "File not found and directory write-protected")
1962 ((file-exists-p (file-name-directory buffer-file-name
))
1963 (setq buffer-read-only nil
))
1965 (setq buffer-read-only nil
)
1966 "Use M-x make-directory RET RET to create the directory and its parents"))))
1969 (or not-serious
(sit-for 1 t
))))
1970 (when (and auto-save-default
(not noauto
))
1971 (auto-save-mode t
)))
1972 ;; Make people do a little extra work (C-x C-q)
1973 ;; before altering a backup file.
1974 (when (backup-file-name-p buffer-file-name
)
1975 (setq buffer-read-only t
))
1976 ;; When a file is marked read-only,
1977 ;; make the buffer read-only even if root is looking at it.
1978 (when (and (file-modes (buffer-file-name))
1979 (zerop (logand (file-modes (buffer-file-name)) #o222
)))
1980 (setq buffer-read-only t
))
1982 (when (and view-read-only view-mode
)
1983 (view-mode-disable))
1985 ;; If requested, add a newline at the end of the file.
1986 (and (memq require-final-newline
'(visit visit-save
))
1987 (> (point-max) (point-min))
1988 (/= (char-after (1- (point-max))) ?
\n)
1989 (not (and (eq selective-display t
)
1990 (= (char-after (1- (point-max))) ?
\r)))
1992 (goto-char (point-max))
1994 (when (and buffer-read-only
1996 (not (eq (get major-mode
'mode-class
) 'special
)))
1998 (run-hooks 'find-file-hook
)))
2000 (defmacro report-errors
(format &rest body
)
2001 "Eval BODY and turn any error into a FORMAT message.
2002 FORMAT can have a %s escape which will be replaced with the actual error.
2003 If `debug-on-error' is set, errors are not caught, so that you can
2005 Avoid using a large BODY since it is duplicated."
2006 (declare (debug t
) (indent 1))
2011 (error (message ,format
(prin1-to-string err
))))))
2013 (defun normal-mode (&optional find-file
)
2014 "Choose the major mode for this buffer automatically.
2015 Also sets up any specified local variables of the file.
2016 Uses the visited file name, the -*- line, and the local variables spec.
2018 This function is called automatically from `find-file'. In that case,
2019 we may set up the file-specified mode and local variables,
2020 depending on the value of `enable-local-variables'.
2021 In addition, if `local-enable-local-variables' is nil, we do
2022 not set local variables (though we do notice a mode specified with -*-.)
2024 `enable-local-variables' is ignored if you run `normal-mode' interactively,
2025 or from Lisp without specifying the optional argument FIND-FILE;
2026 in that case, this function acts as if `enable-local-variables' were t."
2028 (funcall (or default-major-mode
'fundamental-mode
))
2029 (let ((enable-local-variables (or (not find-file
) enable-local-variables
)))
2030 (report-errors "File mode specification error: %s"
2032 (report-errors "File local-variables error: %s"
2033 (hack-local-variables)))
2034 ;; Turn font lock off and on, to make sure it takes account of
2035 ;; whatever file local variables are relevant to it.
2036 (when (and font-lock-mode
2037 ;; Font-lock-mode (now in font-core.el) can be ON when
2038 ;; font-lock.el still hasn't been loaded.
2039 (boundp 'font-lock-keywords
)
2040 (eq (car font-lock-keywords
) t
))
2041 (setq font-lock-keywords
(cadr font-lock-keywords
))
2044 (if (fboundp 'ucs-set-table-for-input
) ; don't lose when building
2045 (ucs-set-table-for-input)))
2047 (defcustom auto-mode-case-fold nil
2048 "Non-nil means to try second pass through `auto-mode-alist'.
2049 This means that if the first case-sensitive search through the alist fails
2050 to find a matching major mode, a second case-insensitive search is made.
2051 On systems with case-insensitive file names, this variable is ignored,
2052 since only a single case-insensitive search through the alist is made."
2057 (defvar auto-mode-alist
2058 ;; Note: The entries for the modes defined in cc-mode.el (c-mode,
2059 ;; c++-mode, java-mode and more) are added through autoload
2060 ;; directives in that file. That way is discouraged since it
2061 ;; spreads out the definition of the initial value.
2064 (cons (purecopy (car elt
)) (cdr elt
)))
2065 `(;; do this first, so that .html.pl is Polish html, not Perl
2066 ("\\.s?html?\\(\\.[a-zA-Z_]+\\)?\\'" . html-mode
)
2067 ("\\.te?xt\\'" . text-mode
)
2068 ("\\.[tT]e[xX]\\'" . tex-mode
)
2069 ("\\.ins\\'" . tex-mode
) ;Installation files for TeX packages.
2070 ("\\.ltx\\'" . latex-mode
)
2071 ("\\.dtx\\'" . doctex-mode
)
2072 ("\\.org\\'" . org-mode
)
2073 ("\\.el\\'" . emacs-lisp-mode
)
2074 ("\\.\\(scm\\|stk\\|ss\\|sch\\)\\'" . scheme-mode
)
2075 ("\\.l\\'" . lisp-mode
)
2076 ("\\.li?sp\\'" . lisp-mode
)
2077 ("\\.[fF]\\'" . fortran-mode
)
2078 ("\\.for\\'" . fortran-mode
)
2079 ("\\.p\\'" . pascal-mode
)
2080 ("\\.pas\\'" . pascal-mode
)
2081 ("\\.ad[abs]\\'" . ada-mode
)
2082 ("\\.ad[bs].dg\\'" . ada-mode
)
2083 ("\\.\\([pP]\\([Llm]\\|erl\\|od\\)\\|al\\)\\'" . perl-mode
)
2084 ("Imakefile\\'" . makefile-imake-mode
)
2085 ("Makeppfile\\(?:\\.mk\\)?\\'" . makefile-makepp-mode
) ; Put this before .mk
2086 ("\\.makepp\\'" . makefile-makepp-mode
)
2087 ,@(if (memq system-type
'(berkeley-unix next-mach darwin
))
2088 '(("\\.mk\\'" . makefile-bsdmake-mode
)
2089 ("GNUmakefile\\'" . makefile-gmake-mode
)
2090 ("[Mm]akefile\\'" . makefile-bsdmake-mode
))
2091 '(("\\.mk\\'" . makefile-gmake-mode
) ; Might be any make, give Gnu the host advantage
2092 ("[Mm]akefile\\'" . makefile-gmake-mode
)))
2093 ("\\.am\\'" . makefile-automake-mode
)
2094 ;; Less common extensions come here
2095 ;; so more common ones above are found faster.
2096 ("\\.texinfo\\'" . texinfo-mode
)
2097 ("\\.te?xi\\'" . texinfo-mode
)
2098 ("\\.[sS]\\'" . asm-mode
)
2099 ("\\.asm\\'" . asm-mode
)
2100 ("[cC]hange\\.?[lL]og?\\'" . change-log-mode
)
2101 ("[cC]hange[lL]og[-.][0-9]+\\'" . change-log-mode
)
2102 ("\\$CHANGE_LOG\\$\\.TXT" . change-log-mode
)
2103 ("\\.scm\\.[0-9]*\\'" . scheme-mode
)
2104 ("\\.[ck]?sh\\'\\|\\.shar\\'\\|/\\.z?profile\\'" . sh-mode
)
2105 ("\\.bash\\'" . sh-mode
)
2106 ("\\(/\\|\\`\\)\\.\\(bash_profile\\|z?login\\|bash_login\\|z?logout\\)\\'" . sh-mode
)
2107 ("\\(/\\|\\`\\)\\.\\(bash_logout\\|shrc\\|[kz]shrc\\|bashrc\\|t?cshrc\\|esrc\\)\\'" . sh-mode
)
2108 ("\\(/\\|\\`\\)\\.\\([kz]shenv\\|xinitrc\\|startxrc\\|xsession\\)\\'" . sh-mode
)
2109 ("\\.m?spec\\'" . sh-mode
)
2110 ("\\.m[mes]\\'" . nroff-mode
)
2111 ("\\.man\\'" . nroff-mode
)
2112 ("\\.sty\\'" . latex-mode
)
2113 ("\\.cl[so]\\'" . latex-mode
) ;LaTeX 2e class option
2114 ("\\.bbl\\'" . latex-mode
)
2115 ("\\.bib\\'" . bibtex-mode
)
2116 ("\\.sql\\'" . sql-mode
)
2117 ("\\.m[4c]\\'" . m4-mode
)
2118 ("\\.mf\\'" . metafont-mode
)
2119 ("\\.mp\\'" . metapost-mode
)
2120 ("\\.vhdl?\\'" . vhdl-mode
)
2121 ("\\.article\\'" . text-mode
)
2122 ("\\.letter\\'" . text-mode
)
2123 ("\\.i?tcl\\'" . tcl-mode
)
2124 ("\\.exp\\'" . tcl-mode
)
2125 ("\\.itk\\'" . tcl-mode
)
2126 ("\\.icn\\'" . icon-mode
)
2127 ("\\.sim\\'" . simula-mode
)
2128 ("\\.mss\\'" . scribe-mode
)
2129 ("\\.f9[05]\\'" . f90-mode
)
2130 ("\\.indent\\.pro\\'" . fundamental-mode
) ; to avoid idlwave-mode
2131 ("\\.\\(pro\\|PRO\\)\\'" . idlwave-mode
)
2132 ("\\.prolog\\'" . prolog-mode
)
2133 ("\\.tar\\'" . tar-mode
)
2134 ;; The list of archive file extensions should be in sync with
2135 ;; `auto-coding-alist' with `no-conversion' coding system.
2137 arc\\|zip\\|lzh\\|lha\\|zoo\\|[jew]ar\\|xpi\\|rar\\|\
2138 ARC\\|ZIP\\|LZH\\|LHA\\|ZOO\\|[JEW]AR\\|XPI\\|RAR\\)\\'" . archive-mode
)
2139 ("\\.\\(sx[dmicw]\\|od[fgpst]\\)\\'" . archive-mode
) ; OpenOffice.org
2140 ("\\.\\(deb\\)\\'" . archive-mode
) ; Debian packages.
2141 ;; Mailer puts message to be edited in
2142 ;; /tmp/Re.... or Message
2143 ("\\`/tmp/Re" . text-mode
)
2144 ("/Message[0-9]*\\'" . text-mode
)
2145 ("\\.zone\\'" . zone-mode
)
2146 ;; some news reader is reported to use this
2147 ("\\`/tmp/fol/" . text-mode
)
2148 ("\\.oak\\'" . scheme-mode
)
2149 ("\\.sgml?\\'" . sgml-mode
)
2150 ("\\.x[ms]l\\'" . xml-mode
)
2151 ("\\.dtd\\'" . sgml-mode
)
2152 ("\\.ds\\(ss\\)?l\\'" . dsssl-mode
)
2153 ("\\.js\\'" . java-mode
) ; javascript-mode would be better
2154 ("\\.[ds]?v\\'" . verilog-mode
)
2155 ;; .emacs or .gnus or .viper following a directory delimiter in
2156 ;; Unix, MSDOG or VMS syntax.
2157 ("[]>:/\\]\\..*\\(emacs\\|gnus\\|viper\\)\\'" . emacs-lisp-mode
)
2158 ("\\`\\..*emacs\\'" . emacs-lisp-mode
)
2159 ;; _emacs following a directory delimiter
2161 ("[:/]_emacs\\'" . emacs-lisp-mode
)
2162 ("/crontab\\.X*[0-9]+\\'" . shell-script-mode
)
2163 ("\\.ml\\'" . lisp-mode
)
2164 ;; Common Lisp ASDF package system.
2165 ("\\.asd\\'" . lisp-mode
)
2166 ("\\.\\(asn\\|mib\\|smi\\)\\'" . snmp-mode
)
2167 ("\\.\\(as\\|mi\\|sm\\)2\\'" . snmpv2-mode
)
2168 ("\\.\\(diffs?\\|patch\\|rej\\)\\'" . diff-mode
)
2169 ("\\.\\(dif\\|pat\\)\\'" . diff-mode
) ; for MSDOG
2170 ("\\.[eE]?[pP][sS]\\'" . ps-mode
)
2171 ("\\.\\(?:PDF\\|DVI\\|pdf\\|dvi\\)\\'" . doc-view-mode
)
2172 ("configure\\.\\(ac\\|in\\)\\'" . autoconf-mode
)
2173 ("\\.s\\(v\\|iv\\|ieve\\)\\'" . sieve-mode
)
2174 ("BROWSE\\'" . ebrowse-tree-mode
)
2175 ("\\.ebrowse\\'" . ebrowse-tree-mode
)
2176 ("#\\*mail\\*" . mail-mode
)
2177 ("\\.g\\'" . antlr-mode
)
2178 ("\\.ses\\'" . ses-mode
)
2179 ("\\.\\(soa\\|zone\\)\\'" . dns-mode
)
2180 ("\\.docbook\\'" . sgml-mode
)
2181 ("\\.com\\'" . dcl-mode
)
2182 ("/config\\.\\(?:bat\\|log\\)\\'" . fundamental-mode
)
2183 ;; Windows candidates may be opened case sensitively on Unix
2184 ("\\.\\(?:[iI][nN][iI]\\|[lL][sS][tT]\\|[rR][eE][gG]\\|[sS][yY][sS]\\)\\'" . conf-mode
)
2185 ("\\.\\(?:desktop\\|la\\)\\'" . conf-unix-mode
)
2186 ("\\.ppd\\'" . conf-ppd-mode
)
2187 ("java.+\\.conf\\'" . conf-javaprop-mode
)
2188 ("\\.properties\\(?:\\.[a-zA-Z0-9._-]+\\)?\\'" . conf-javaprop-mode
)
2189 ;; *.cf, *.cfg, *.conf, *.config[.local|.de_DE.UTF8|...], */config
2190 ("[/.]c\\(?:on\\)?f\\(?:i?g\\)?\\(?:\\.[a-zA-Z0-9._-]+\\)?\\'" . conf-mode-maybe
)
2191 ("\\`/etc/\\(?:DIR_COLORS\\|ethers\\|.?fstab\\|.*hosts\\|lesskey\\|login\\.?de\\(?:fs\\|vperm\\)\\|magic\\|mtab\\|pam\\.d/.*\\|permissions\\(?:\\.d/.+\\)?\\|protocols\\|rpc\\|services\\)\\'" . conf-space-mode
)
2192 ("\\`/etc/\\(?:acpid?/.+\\|aliases\\(?:\\.d/.+\\)?\\|default/.+\\|group-?\\|hosts\\..+\\|inittab\\|ksysguarddrc\\|opera6rc\\|passwd-?\\|shadow-?\\|sysconfig/.+\\)\\'" . conf-mode
)
2193 ;; ChangeLog.old etc. Other change-log-mode entries are above;
2194 ;; this has lower priority to avoid matching changelog.sgml etc.
2195 ("[cC]hange[lL]og[-.][-0-9a-z]+\\'" . change-log-mode
)
2196 ;; either user's dot-files or under /etc or some such
2197 ("/\\.?\\(?:gnokiirc\\|kde.*rc\\|mime\\.types\\|wgetrc\\)\\'" . conf-mode
)
2198 ;; alas not all ~/.*rc files are like this
2199 ("/\\.\\(?:enigma\\|gltron\\|gtk\\|hxplayer\\|net\\|neverball\\|qt/.+\\|realplayer\\|scummvm\\|sversion\\|sylpheed/.+\\|xmp\\)rc\\'" . conf-mode
)
2200 ("/\\.\\(?:gdbtkinit\\|grip\\|orbital/.+txt\\|rhosts\\|tuxracer/options\\)\\'" . conf-mode
)
2201 ("/\\.?X\\(?:default\\|resource\\|re\\)s\\>" . conf-xdefaults-mode
)
2202 ("/X11.+app-defaults/" . conf-xdefaults-mode
)
2203 ("/X11.+locale/.+/Compose\\'" . conf-colon-mode
)
2204 ;; this contains everything twice, with space and with colon :-(
2205 ("/X11.+locale/compose\\.dir\\'" . conf-javaprop-mode
)
2206 ;; Get rid of any trailing .n.m and try again.
2207 ;; This is for files saved by cvs-merge that look like .#<file>.<rev>
2208 ;; or .#<file>.<rev>-<rev> or VC's <file>.~<rev>~.
2209 ;; Using mode nil rather than `ignore' would let the search continue
2210 ;; through this list (with the shortened name) rather than start over.
2211 ("\\.~?[0-9]+\\.[0-9][-.0-9]*~?\\'" nil t
)
2212 ;; The following should come after the ChangeLog pattern
2213 ;; for the sake of ChangeLog.1, etc.
2214 ;; and after the .scm.[0-9] and CVS' <file>.<rev> patterns too.
2215 ("\\.[1-9]\\'" . nroff-mode
)
2216 ("\\.\\(?:orig\\|in\\|[bB][aA][kK]\\)\\'" nil t
)))
2217 "Alist of filename patterns vs corresponding major mode functions.
2218 Each element looks like (REGEXP . FUNCTION) or (REGEXP FUNCTION NON-NIL).
2219 \(NON-NIL stands for anything that is not nil; the value does not matter.)
2220 Visiting a file whose name matches REGEXP specifies FUNCTION as the
2221 mode function to use. FUNCTION will be called, unless it is nil.
2223 If the element has the form (REGEXP FUNCTION NON-NIL), then after
2224 calling FUNCTION (if it's not nil), we delete the suffix that matched
2225 REGEXP and search the list again for another match.
2227 If the file name matches `inhibit-first-line-modes-regexps',
2228 then `auto-mode-alist' is not processed.
2230 The extensions whose FUNCTION is `archive-mode' should also
2231 appear in `auto-coding-alist' with `no-conversion' coding system.
2233 See also `interpreter-mode-alist', which detects executable script modes
2234 based on the interpreters they specify to run,
2235 and `magic-mode-alist', which determines modes based on file contents.")
2237 (defun conf-mode-maybe ()
2238 "Select Conf mode or XML mode according to start of file."
2242 (goto-char (point-min))
2243 (looking-at "<\\?xml \\|<!-- \\|<!DOCTYPE ")))
2247 (defvar interpreter-mode-alist
2248 ;; Note: The entries for the modes defined in cc-mode.el (awk-mode
2249 ;; and pike-mode) are added through autoload directives in that
2250 ;; file. That way is discouraged since it spreads out the
2251 ;; definition of the initial value.
2254 (cons (purecopy (car l
)) (cdr l
)))
2255 '(("perl" . perl-mode
)
2256 ("perl5" . perl-mode
)
2257 ("miniperl" . perl-mode
)
2259 ("wishx" . tcl-mode
)
2261 ("tclsh" . tcl-mode
)
2262 ("scm" . scheme-mode
)
2282 ("tail" . text-mode
)
2283 ("more" . text-mode
)
2284 ("less" . text-mode
)
2286 ("make" . makefile-gmake-mode
) ; Debian uses this
2287 ("guile" . scheme-mode
)
2288 ("clisp" . lisp-mode
)))
2289 "Alist mapping interpreter names to major modes.
2290 This is used for files whose first lines match `auto-mode-interpreter-regexp'.
2291 Each element looks like (INTERPRETER . MODE).
2292 If INTERPRETER matches the name of the interpreter specified in the first line
2293 of a script, mode MODE is enabled.
2295 See also `auto-mode-alist'.")
2297 (defvar inhibit-first-line-modes-regexps
'("\\.tar\\'" "\\.tgz\\'")
2298 "List of regexps; if one matches a file name, don't look for `-*-'.")
2300 (defvar inhibit-first-line-modes-suffixes nil
2301 "List of regexps for what to ignore, for `inhibit-first-line-modes-regexps'.
2302 When checking `inhibit-first-line-modes-regexps', we first discard
2303 from the end of the file name anything that matches one of these regexps.")
2305 (defvar auto-mode-interpreter-regexp
2306 "#![ \t]?\\([^ \t\n]*\
2307 /bin/env[ \t]\\)?\\([^ \t\n]+\\)"
2308 "Regexp matching interpreters, for file mode determination.
2309 This regular expression is matched against the first line of a file
2310 to determine the file's mode in `set-auto-mode'. If it matches, the file
2311 is assumed to be interpreted by the interpreter matched by the second group
2312 of the regular expression. The mode is then determined as the mode
2313 associated with that interpreter in `interpreter-mode-alist'.")
2315 (defvar magic-mode-alist nil
2316 "Alist of buffer beginnings vs. corresponding major mode functions.
2317 Each element looks like (REGEXP . FUNCTION) or (MATCH-FUNCTION . FUNCTION).
2318 After visiting a file, if REGEXP matches the text at the beginning of the
2319 buffer, or calling MATCH-FUNCTION returns non-nil, `normal-mode' will
2320 call FUNCTION rather than allowing `auto-mode-alist' to decide the buffer's
2323 If FUNCTION is nil, then it is not called. (That is a way of saying
2324 \"allow `auto-mode-alist' to decide for these files.\")")
2325 (put 'magic-mode-alist
'risky-local-variable t
)
2327 (defvar magic-fallback-mode-alist
2328 `((image-type-auto-detected-p . image-mode
)
2329 ;; The < comes before the groups (but the first) to reduce backtracking.
2330 ;; TODO: UTF-16 <?xml may be preceded by a BOM 0xff 0xfe or 0xfe 0xff.
2331 ;; We use [ \t\r\n] instead of `\\s ' to make regex overflow less likely.
2332 (,(let* ((incomment-re "\\(?:[^-]\\|-[^-]\\)")
2333 (comment-re (concat "\\(?:!--" incomment-re
"*-->[ \t\r\n]*<\\)")))
2334 (concat "\\(?:<\\?xml[ \t\r\n]+[^>]*>\\)?[ \t\r\n]*<"
2336 "\\(?:!DOCTYPE[ \t\r\n]+[^>]*>[ \t\r\n]*<[ \t\r\n]*" comment-re
"*\\)?"
2337 "[Hh][Tt][Mm][Ll]"))
2339 ("<!DOCTYPE[ \t\r\n]+[Hh][Tt][Mm][Ll]" . html-mode
)
2340 ;; These two must come after html, because they are more general:
2341 ("<\\?xml " . xml-mode
)
2342 (,(let* ((incomment-re "\\(?:[^-]\\|-[^-]\\)")
2343 (comment-re (concat "\\(?:!--" incomment-re
"*-->[ \t\r\n]*<\\)")))
2344 (concat "[ \t\r\n]*<" comment-re
"*!DOCTYPE "))
2347 ("# xmcd " . conf-unix-mode
))
2348 "Like `magic-mode-alist' but has lower priority than `auto-mode-alist'.
2349 Each element looks like (REGEXP . FUNCTION) or (MATCH-FUNCTION . FUNCTION).
2350 After visiting a file, if REGEXP matches the text at the beginning of the
2351 buffer, or calling MATCH-FUNCTION returns non-nil, `normal-mode' will
2352 call FUNCTION, provided that `magic-mode-alist' and `auto-mode-alist'
2353 have not specified a mode for this file.
2355 If FUNCTION is nil, then it is not called.")
2356 (put 'magic-fallback-mode-alist
'risky-local-variable t
)
2358 (defvar magic-mode-regexp-match-limit
4000
2359 "Upper limit on `magic-mode-alist' regexp matches.
2360 Also applies to `magic-fallback-mode-alist'.")
2362 (defun set-auto-mode (&optional keep-mode-if-same
)
2363 "Select major mode appropriate for current buffer.
2365 To find the right major mode, this function checks for a -*- mode tag,
2366 checks if it uses an interpreter listed in `interpreter-mode-alist',
2367 matches the buffer beginning against `magic-mode-alist',
2368 compares the filename against the entries in `auto-mode-alist',
2369 then matches the buffer beginning against `magic-fallback-mode-alist'.
2371 It does not check for the `mode:' local variable in the
2372 Local Variables section of the file; for that, use `hack-local-variables'.
2374 If `enable-local-variables' is nil, this function does not check for a
2377 If the optional argument KEEP-MODE-IF-SAME is non-nil, then we
2378 set the major mode only if that would change it. In other words
2379 we don't actually set it to the same mode the buffer already has."
2380 ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*-
2381 (let (end done mode modes
)
2382 ;; Find a -*- mode tag
2384 (goto-char (point-min))
2385 (skip-chars-forward " \t\n")
2386 (and enable-local-variables
2387 (setq end
(set-auto-mode-1))
2388 (if (save-excursion (search-forward ":" end t
))
2389 ;; Find all specifications for the `mode:' variable
2390 ;; and execute them left to right.
2391 (while (let ((case-fold-search t
))
2392 (or (and (looking-at "mode:")
2393 (goto-char (match-end 0)))
2394 (re-search-forward "[ \t;]mode:" end t
)))
2395 (skip-chars-forward " \t")
2396 (let ((beg (point)))
2397 (if (search-forward ";" end t
)
2400 (skip-chars-backward " \t")
2401 (push (intern (concat (downcase (buffer-substring beg
(point))) "-mode"))
2403 ;; Simple -*-MODE-*- case.
2404 (push (intern (concat (downcase (buffer-substring (point) end
))
2407 ;; If we found modes to use, invoke them now, outside the save-excursion.
2410 (dolist (mode (nreverse modes
))
2411 (if (not (functionp mode
))
2412 (message "Ignoring unknown mode `%s'" mode
)
2414 (or (set-auto-mode-0 mode keep-mode-if-same
)
2415 ;; continuing would call minor modes again, toggling them off
2416 (throw 'nop nil
))))))
2417 ;; If we didn't, look for an interpreter specified in the first line.
2418 ;; As a special case, allow for things like "#!/bin/env perl", which
2419 ;; finds the interpreter anywhere in $PATH.
2421 (setq mode
(save-excursion
2422 (goto-char (point-min))
2423 (if (looking-at auto-mode-interpreter-regexp
)
2426 ;; Map interpreter name to a mode, signalling we're done at the
2428 done
(assoc (file-name-nondirectory mode
)
2429 interpreter-mode-alist
))
2430 ;; If we found an interpreter mode to use, invoke it now.
2432 (set-auto-mode-0 (cdr done
) keep-mode-if-same
)))
2433 ;; Next try matching the buffer beginning against magic-mode-alist.
2435 (if (setq done
(save-excursion
2436 (goto-char (point-min))
2438 (narrow-to-region (point-min)
2440 (+ (point-min) magic-mode-regexp-match-limit
)))
2441 (assoc-default nil magic-mode-alist
2445 (looking-at re
)))))))
2446 (set-auto-mode-0 done keep-mode-if-same
)))
2447 ;; Next compare the filename against the entries in auto-mode-alist.
2449 (if buffer-file-name
2450 (let ((name buffer-file-name
)
2451 (remote-id (file-remote-p buffer-file-name
)))
2452 ;; Remove remote file name identification.
2453 (when (and (stringp remote-id
)
2454 (string-match (regexp-quote remote-id
) name
))
2455 (setq name
(substring name
(match-end 0))))
2456 ;; Remove backup-suffixes from file name.
2457 (setq name
(file-name-sans-versions name
))
2459 ;; Find first matching alist entry.
2461 (if (memq system-type
'(windows-nt cygwin
))
2462 ;; System is case-insensitive.
2463 (let ((case-fold-search t
))
2464 (assoc-default name auto-mode-alist
2466 ;; System is case-sensitive.
2468 ;; First match case-sensitively.
2469 (let ((case-fold-search nil
))
2470 (assoc-default name auto-mode-alist
2472 ;; Fallback to case-insensitive match.
2473 (and auto-mode-case-fold
2474 (let ((case-fold-search t
))
2475 (assoc-default name auto-mode-alist
2480 (setq mode
(car mode
)
2481 name
(substring name
0 (match-beginning 0)))
2484 (set-auto-mode-0 mode keep-mode-if-same
)
2486 ;; Next try matching the buffer beginning against magic-fallback-mode-alist.
2488 (if (setq done
(save-excursion
2489 (goto-char (point-min))
2491 (narrow-to-region (point-min)
2493 (+ (point-min) magic-mode-regexp-match-limit
)))
2494 (assoc-default nil magic-fallback-mode-alist
2498 (looking-at re
)))))))
2499 (set-auto-mode-0 done keep-mode-if-same
)))))
2501 ;; When `keep-mode-if-same' is set, we are working on behalf of
2502 ;; set-visited-file-name. In that case, if the major mode specified is the
2503 ;; same one we already have, don't actually reset it. We don't want to lose
2504 ;; minor modes such as Font Lock.
2505 (defun set-auto-mode-0 (mode &optional keep-mode-if-same
)
2506 "Apply MODE and return it.
2507 If optional arg KEEP-MODE-IF-SAME is non-nil, MODE is chased of
2508 any aliases and compared to current major mode. If they are the
2509 same, do nothing and return nil."
2510 (unless (and keep-mode-if-same
2511 (eq (indirect-function mode
)
2512 (indirect-function major-mode
)))
2517 (defun set-auto-mode-1 ()
2518 "Find the -*- spec in the buffer.
2519 Call with point at the place to start searching from.
2520 If one is found, set point to the beginning
2521 and return the position of the end.
2522 Otherwise, return nil; point may be changed."
2525 ;; Don't look for -*- if this file name matches any
2526 ;; of the regexps in inhibit-first-line-modes-regexps.
2527 (let ((temp inhibit-first-line-modes-regexps
)
2528 (name (if buffer-file-name
2529 (file-name-sans-versions buffer-file-name
)
2531 (while (let ((sufs inhibit-first-line-modes-suffixes
))
2532 (while (and sufs
(not (string-match (car sufs
) name
)))
2533 (setq sufs
(cdr sufs
)))
2535 (setq name
(substring name
0 (match-beginning 0))))
2537 (not (string-match (car temp
) name
)))
2538 (setq temp
(cdr temp
)))
2541 (search-forward "-*-" (line-end-position
2542 ;; If the file begins with "#!"
2543 ;; (exec interpreter magic), look
2544 ;; for mode frobs in the first two
2545 ;; lines. You cannot necessarily
2546 ;; put them in the first line of
2547 ;; such a file without screwing up
2548 ;; the interpreter invocation.
2549 ;; The same holds for
2551 ;; in man pages (preprocessor
2552 ;; magic for the `man' program).
2553 (and (looking-at "^\\(#!\\|'\\\\\"\\)") 2)) t
)
2555 (skip-chars-forward " \t")
2557 (search-forward "-*-" (line-end-position) t
))
2560 (skip-chars-backward " \t")
2565 ;;; Handling file local variables
2567 (defvar ignored-local-variables
2568 '(ignored-local-variables safe-local-variable-values
2569 file-local-variables-alist
)
2570 "Variables to be ignored in a file's local variable spec.")
2572 (defvar hack-local-variables-hook nil
2573 "Normal hook run after processing a file's local variables specs.
2574 Major modes can use this to examine user-specified local variables
2575 in order to initialize other data structure based on them.")
2577 (defcustom safe-local-variable-values nil
2578 "List variable-value pairs that are considered safe.
2579 Each element is a cons cell (VAR . VAL), where VAR is a variable
2580 symbol and VAL is a value that is considered safe."
2584 (defcustom safe-local-eval-forms
'((add-hook 'write-file-hooks
'time-stamp
))
2585 "Expressions that are considered safe in an `eval:' local variable.
2586 Add expressions to this list if you want Emacs to evaluate them, when
2587 they appear in an `eval' local variable specification, without first
2588 asking you for confirmation."
2591 :type
'(repeat sexp
))
2593 ;; Risky local variables:
2594 (mapc (lambda (var) (put var
'risky-local-variable t
))
2597 buffer-auto-save-file-name
2599 buffer-file-truename
2601 dabbrev-case-fold-search
2602 dabbrev-case-replace
2604 default-text-properties
2607 enable-local-variables
2611 file-name-handler-alist
2618 ignored-local-variables
2620 imenu-generic-expression
2627 minor-mode-map-alist
2628 minor-mode-overriding-map-alist
2629 mode-line-buffer-identification
2640 overriding-local-map
2641 overriding-terminal-local-map
2644 rmail-output-file-alist
2645 safe-local-variable-values
2646 safe-local-eval-forms
2647 save-some-buffers-action-alist
2648 special-display-buffer-names
2651 unread-command-events
2654 ;; Safe local variables:
2656 ;; For variables defined by major modes, the safety declarations can go into
2657 ;; the major mode's file, since that will be loaded before file variables are
2660 ;; For variables defined by minor modes, put the safety declarations in the
2661 ;; file defining the minor mode after the defcustom/defvar using an autoload
2664 ;; ;;;###autoload(put 'variable 'safe-local-variable 'stringp)
2666 ;; Otherwise, when Emacs visits a file specifying that local variable, the
2667 ;; minor mode file may not be loaded yet.
2669 ;; For variables defined in the C source code the declaration should go here:
2671 (mapc (lambda (pair)
2672 (put (car pair
) 'safe-local-variable
(cdr pair
)))
2673 '((buffer-read-only . booleanp
) ;; C source code
2674 (default-directory . stringp
) ;; C source code
2675 (fill-column . integerp
) ;; C source code
2676 (indent-tabs-mode . booleanp
) ;; C source code
2677 (left-margin . integerp
) ;; C source code
2678 (no-update-autoloads . booleanp
)
2679 (tab-width . integerp
) ;; C source code
2680 (truncate-lines . booleanp
))) ;; C source code
2682 (put 'c-set-style
'safe-local-eval-function t
)
2684 (defvar file-local-variables-alist nil
2685 "Alist of file-local variable settings in the current buffer.
2686 Each element in this list has the form (VAR . VALUE), where VAR
2687 is a file-local variable (a symbol) and VALUE is the value
2688 specified. The actual value in the buffer may differ from VALUE,
2689 if it is changed by the major or minor modes, or by the user.")
2690 (make-variable-buffer-local 'file-local-variables-alist
)
2692 (defvar before-hack-local-variables-hook nil
2693 "Normal hook run before setting file-local variables.
2694 It is called after checking for unsafe/risky variables and
2695 setting `file-local-variables-alist', and before applying the
2696 variables stored in `file-local-variables-alist'. A hook
2697 function is allowed to change the contents of this alist.
2699 This hook is called only if there is at least one file-local
2702 (defun hack-local-variables-confirm (all-vars unsafe-vars risky-vars project
)
2703 "Get confirmation before setting up local variable values.
2704 ALL-VARS is the list of all variables to be set up.
2705 UNSAFE-VARS is the list of those that aren't marked as safe or risky.
2706 RISKY-VARS is the list of those that are marked as risky.
2707 PROJECT is a directory name if these settings come from directory-local
2708 settings, or nil otherwise."
2711 (let ((name (if buffer-file-name
2712 (file-name-nondirectory buffer-file-name
)
2713 (concat "buffer " (buffer-name))))
2714 (offer-save (and (eq enable-local-variables t
) unsafe-vars
))
2716 (save-window-excursion
2717 (let ((buf (get-buffer-create "*Local Variables*")))
2719 (set (make-local-variable 'cursor-type
) nil
)
2722 (insert "The local variables list in " (or project name
)
2723 "\ncontains values that may not be safe (*)"
2725 ", and variables that are risky (**)."
2728 (insert "The local variables list in " (or project name
)
2729 "\ncontains variables that are risky (**).")
2730 (insert "A local variables list is specified in "
2731 (or project name
) ".")))
2732 (insert "\n\nDo you want to apply it? You can type
2733 y -- to apply the local variables list.
2734 n -- to ignore the local variables list.")
2737 ! -- to apply the local variables list, and permanently mark these
2738 values (*) as safe (in the future, they will be set automatically.)\n\n")
2740 (dolist (elt all-vars
)
2741 (cond ((member elt unsafe-vars
)
2743 ((member elt risky-vars
)
2747 (princ (car elt
) buf
)
2749 ;; Make strings with embedded whitespace easier to read.
2750 (let ((print-escape-newlines t
))
2751 (prin1 (cdr elt
) buf
))
2754 (format "Please type %s%s: "
2755 (if offer-save
"y, n, or !" "y or n")
2756 (if (< (line-number-at-pos) (window-body-height))
2758 ", or C-v to scroll")))
2759 (goto-char (point-min))
2760 (let ((cursor-in-echo-area t
)
2761 (executing-kbd-macro executing-kbd-macro
)
2763 (if offer-save
'(?
! ?y ?n ?\s ?\C-g
) '(?y ?n ?\s ?\C-g
)))
2766 (message "%s" prompt
)
2767 (setq char
(read-event))
2769 (cond ((eq char ?\C-v
)
2772 (error (goto-char (point-min)))))
2773 ;; read-event returns -1 if we are in a kbd
2774 ;; macro and there are no more events in the
2775 ;; macro. In that case, attempt to get an
2776 ;; event interactively.
2777 ((and executing-kbd-macro
(= char -
1))
2778 (setq executing-kbd-macro nil
))
2779 (t (setq done
(memq (downcase char
) exit-chars
)))))))
2780 (setq char
(downcase char
))
2781 (when (and offer-save
(= char ?
!) unsafe-vars
)
2782 (dolist (elt unsafe-vars
)
2783 (add-to-list 'safe-local-variable-values elt
))
2784 ;; When this is called from desktop-restore-file-buffer,
2785 ;; coding-system-for-read may be non-nil. Reset it before
2786 ;; writing to .emacs.
2787 (if (or custom-file user-init-file
)
2788 (let ((coding-system-for-read nil
))
2789 (customize-save-variable
2790 'safe-local-variable-values
2791 safe-local-variable-values
))))
2797 (defun hack-local-variables-prop-line (&optional mode-only
)
2798 "Return local variables specified in the -*- line.
2799 Ignore any specification for `mode:' and `coding:';
2800 `set-auto-mode' should already have handled `mode:',
2801 `set-auto-coding' should already have handled `coding:'.
2803 If MODE-ONLY is non-nil, all we do is check whether the major
2804 mode is specified, returning t if it is specified. Otherwise,
2805 return an alist of elements (VAR . VAL), where VAR is a variable
2806 and VAL is the specified value."
2808 (goto-char (point-min))
2809 (let ((end (set-auto-mode-1))
2810 result mode-specified
)
2811 ;; Parse the -*- line into the RESULT alist.
2812 ;; Also set MODE-SPECIFIED if we see a spec or `mode'.
2815 ((looking-at "[ \t]*\\([^ \t\n\r:;]+\\)\\([ \t]*-\\*-\\)")
2816 ;; Simple form: "-*- MODENAME -*-". Already handled.
2817 (setq mode-specified t
)
2820 ;; Hairy form: '-*-' [ <variable> ':' <value> ';' ]* '-*-'
2821 ;; (last ";" is optional).
2822 (while (< (point) end
)
2823 (or (looking-at "[ \t]*\\([^ \t\n:]+\\)[ \t]*:[ \t]*")
2824 (error "Malformed -*- line"))
2825 (goto-char (match-end 0))
2826 ;; There used to be a downcase here,
2827 ;; but the manual didn't say so,
2828 ;; and people want to set var names that aren't all lc.
2829 (let ((key (intern (match-string 1)))
2830 (val (save-restriction
2831 (narrow-to-region (point) end
)
2832 (read (current-buffer)))))
2833 ;; It is traditional to ignore
2834 ;; case when checking for `mode' in set-auto-mode,
2835 ;; so we must do that here as well.
2836 ;; That is inconsistent, but we're stuck with it.
2837 ;; The same can be said for `coding' in set-auto-coding.
2838 (or (and (equal (downcase (symbol-name key
)) "mode")
2839 (setq mode-specified t
))
2840 (equal (downcase (symbol-name key
)) "coding")
2842 (push (cons (if (eq key
'eval
)
2844 (indirect-variable key
))
2847 (skip-chars-forward " \t;")))))
2853 (defun hack-local-variables-filter (variables project
)
2854 "Filter local variable settings, querying the user if necessary.
2855 VARIABLES is the alist of variable-value settings. This alist is
2856 filtered based on the values of `ignored-local-variables',
2857 `enable-local-eval', `enable-local-variables', and (if necessary)
2858 user interaction. The results are added to
2859 `file-local-variables-alist', without applying them.
2860 PROJECT is a directory name if these settings come from
2861 directory-local settings, or nil otherwise."
2862 ;; Strip any variables that are in `ignored-local-variables'.
2863 (dolist (ignored ignored-local-variables
)
2864 (setq variables
(assq-delete-all ignored variables
)))
2865 ;; If `enable-local-eval' is nil, strip eval "variables".
2866 (if (null enable-local-eval
)
2867 (setq variables
(assq-delete-all 'eval variables
)))
2868 (setq variables
(nreverse variables
))
2870 ;; Find those variables that we may want to save to
2871 ;; `safe-local-variable-values'.
2872 (let (risky-vars unsafe-vars
)
2873 (dolist (elt variables
)
2874 (let ((var (car elt
))
2876 ;; Don't query about the fake variables.
2877 (or (memq var
'(mode unibyte coding
))
2879 (or (eq enable-local-eval t
)
2880 (hack-one-local-variable-eval-safep
2881 (eval (quote val
)))))
2882 (safe-local-variable-p var val
)
2883 (and (risky-local-variable-p var val
)
2884 (push elt risky-vars
))
2885 (push elt unsafe-vars
))))
2886 (if (eq enable-local-variables
:safe
)
2887 ;; If caller wants only safe variables, store only these.
2888 (dolist (elt variables
)
2889 (unless (or (member elt unsafe-vars
)
2890 (member elt risky-vars
))
2891 (push elt file-local-variables-alist
)))
2892 ;; Query, unless all are known safe or the user wants no
2894 (if (or (and (eq enable-local-variables t
)
2897 (eq enable-local-variables
:all
)
2898 (hack-local-variables-confirm
2899 variables unsafe-vars risky-vars project
))
2900 (dolist (elt variables
)
2901 (push elt file-local-variables-alist
)))))))
2903 (defun hack-local-variables (&optional mode-only
)
2904 "Parse and put into effect this buffer's local variables spec.
2905 If MODE-ONLY is non-nil, all we do is check whether the major mode
2906 is specified, returning t if it is specified."
2907 (let ((enable-local-variables
2908 (and local-enable-local-variables enable-local-variables
))
2911 (setq file-local-variables-alist nil
)
2912 (report-errors "Project local-variables error: %s"
2913 (hack-project-variables)))
2914 (when (or mode-only enable-local-variables
)
2915 (setq result
(hack-local-variables-prop-line mode-only
))
2916 ;; Look for "Local variables:" line in last page.
2918 (goto-char (point-max))
2919 (search-backward "\n\^L" (max (- (point-max) 3000) (point-min))
2921 (when (let ((case-fold-search t
))
2922 (search-forward "Local Variables:" nil t
))
2923 (skip-chars-forward " \t")
2924 ;; suffix is what comes after "local variables:" in its line.
2925 ;; prefix is what comes before "local variables:" in its line.
2928 (regexp-quote (buffer-substring (point)
2929 (line-end-position)))
2932 (concat "^" (regexp-quote
2933 (buffer-substring (line-beginning-position)
2934 (match-beginning 0)))))
2938 (let ((startpos (point))
2940 (thisbuf (current-buffer)))
2942 (unless (let ((case-fold-search t
))
2944 (concat prefix
"[ \t]*End:[ \t]*" suffix
)
2946 ;; This used to be an error, but really all it means is
2947 ;; that this may simply not be a local-variables section,
2948 ;; so just ignore it.
2949 (message "Local variables list is not properly terminated"))
2951 (setq endpos
(point)))
2954 (insert-buffer-substring thisbuf startpos endpos
)
2955 (goto-char (point-min))
2956 (subst-char-in-region (point) (point-max) ?\^m ?
\n)
2958 ;; Discard the prefix.
2959 (if (looking-at prefix
)
2960 (delete-region (point) (match-end 0))
2961 (error "Local variables entry is missing the prefix"))
2963 ;; Discard the suffix.
2964 (if (looking-back suffix
)
2965 (delete-region (match-beginning 0) (point))
2966 (error "Local variables entry is missing the suffix"))
2968 (goto-char (point-min))
2971 ;; Find the variable name; strip whitespace.
2972 (skip-chars-forward " \t")
2974 (skip-chars-forward "^:\n")
2975 (if (eolp) (error "Missing colon in local variables entry"))
2976 (skip-chars-backward " \t")
2977 (let* ((str (buffer-substring beg
(point)))
2980 ;; Read the variable value.
2981 (skip-chars-forward "^:")
2983 (setq val
(read (current-buffer)))
2987 (unless (eq var
'coding
)
2989 (push (cons (if (eq var
'eval
)
2991 (indirect-variable var
))
2994 (forward-line 1))))))))
2995 ;; Now we've read all the local variables.
2996 ;; If MODE-ONLY is non-nil, return whether the mode was specified.
2997 (cond (mode-only result
)
2998 ;; Otherwise, set the variables.
2999 (enable-local-variables
3000 (hack-local-variables-filter result nil
)
3001 (when file-local-variables-alist
3002 (setq file-local-variables-alist
3003 (nreverse file-local-variables-alist
))
3004 (run-hooks 'before-hack-local-variables-hook
)
3005 (dolist (elt file-local-variables-alist
)
3006 (hack-one-local-variable (car elt
) (cdr elt
))))
3007 (run-hooks 'hack-local-variables-hook
)))))
3009 (defun safe-local-variable-p (sym val
)
3010 "Non-nil if SYM is safe as a file-local variable with value VAL.
3011 It is safe if any of these conditions are met:
3013 * There is a matching entry (SYM . VAL) in the
3014 `safe-local-variable-values' user option.
3016 * The `safe-local-variable' property of SYM is a function that
3017 evaluates to a non-nil value with VAL as an argument."
3018 (or (member (cons sym val
) safe-local-variable-values
)
3019 (let ((safep (get sym
'safe-local-variable
)))
3020 (and (functionp safep
) (funcall safep val
)))))
3022 (defun risky-local-variable-p (sym &optional ignored
)
3023 "Non-nil if SYM could be dangerous as a file-local variable.
3024 It is dangerous if either of these conditions are met:
3026 * Its `risky-local-variable' property is non-nil.
3028 * Its name ends with \"hook(s)\", \"function(s)\", \"form(s)\", \"map\",
3029 \"program\", \"command(s)\", \"predicate(s)\", \"frame-alist\",
3030 \"mode-alist\", \"font-lock-(syntactic-)keyword*\",
3031 \"map-alist\", or \"bindat-spec\"."
3032 ;; If this is an alias, check the base name.
3034 (setq sym
(indirect-variable sym
))
3036 (or (get sym
'risky-local-variable
)
3037 (string-match "-hooks?$\\|-functions?$\\|-forms?$\\|-program$\\|\
3038 -commands?$\\|-predicates?$\\|font-lock-keywords$\\|font-lock-keywords\
3039 -[0-9]+$\\|font-lock-syntactic-keywords$\\|-frame-alist$\\|-mode-alist$\\|\
3040 -map$\\|-map-alist$\\|-bindat-spec$" (symbol-name sym
))))
3042 (defun hack-one-local-variable-quotep (exp)
3043 (and (consp exp
) (eq (car exp
) 'quote
) (consp (cdr exp
))))
3045 (defun hack-one-local-variable-constantp (exp)
3046 (or (and (not (symbolp exp
)) (not (consp exp
)))
3049 (hack-one-local-variable-quotep exp
)))
3051 (defun hack-one-local-variable-eval-safep (exp)
3052 "Return t if it is safe to eval EXP when it is found in a file."
3053 (or (not (consp exp
))
3054 ;; Detect certain `put' expressions.
3055 (and (eq (car exp
) 'put
)
3056 (hack-one-local-variable-quotep (nth 1 exp
))
3057 (hack-one-local-variable-quotep (nth 2 exp
))
3058 (let ((prop (nth 1 (nth 2 exp
)))
3060 (cond ((memq prop
'(lisp-indent-hook
3061 lisp-indent-function
3062 scheme-indent-function
))
3063 ;; Only allow safe values (not functions).
3065 (and (hack-one-local-variable-quotep val
)
3066 (eq (nth 1 val
) 'defun
))))
3067 ((eq prop
'edebug-form-spec
)
3068 ;; Only allow indirect form specs.
3069 ;; During bootstrapping, edebug-basic-spec might not be
3071 (and (fboundp 'edebug-basic-spec
)
3072 (hack-one-local-variable-quotep val
)
3073 (edebug-basic-spec (nth 1 val
)))))))
3074 ;; Allow expressions that the user requested.
3075 (member exp safe-local-eval-forms
)
3076 ;; Certain functions can be allowed with safe arguments
3077 ;; or can specify verification functions to try.
3078 (and (symbolp (car exp
))
3079 (let ((prop (get (car exp
) 'safe-local-eval-function
)))
3082 (dolist (arg (cdr exp
))
3083 (unless (hack-one-local-variable-constantp arg
)
3090 (dolist (function prop
)
3091 (if (funcall function exp
)
3095 (defun hack-one-local-variable (var val
)
3096 "Set local variable VAR with value VAL.
3097 If VAR is `mode', call `VAL-mode' as a function unless it's
3098 already the major mode."
3099 (cond ((eq var
'mode
)
3100 (let ((mode (intern (concat (downcase (symbol-name val
))
3102 (unless (eq (indirect-function mode
)
3103 (indirect-function major-mode
))
3106 (save-excursion (eval val
)))
3108 ;; Make sure the string has no text properties.
3109 ;; Some text properties can get evaluated in various ways,
3110 ;; so it is risky to put them on with a local variable list.
3112 (set-text-properties 0 (length val
) nil val
))
3113 (set (make-local-variable var
) val
))))
3115 ;;; Handling directory local variables, aka project settings.
3117 (defvar project-class-alist
'()
3118 "Alist mapping project class names (symbols) to project variable lists.")
3120 (defvar project-directory-alist
'()
3121 "Alist mapping project directory roots to project classes.")
3123 (defsubst project-get-alist
(class)
3124 "Return the project variable list for project CLASS."
3125 (cdr (assq class project-class-alist
)))
3127 (defun project-collect-bindings-from-alist (mode-alist settings
)
3128 "Collect local variable settings from MODE-ALIST.
3129 SETTINGS is the initial list of bindings.
3130 Returns the new list."
3131 (dolist (pair mode-alist settings
)
3132 (let* ((variable (car pair
))
3134 (slot (assq variable settings
)))
3137 ;; Need a new cons in case we setcdr later.
3138 (push (cons variable value
) settings
)))))
3140 (defun project-collect-binding-list (binding-list root settings
)
3141 "Collect entries from BINDING-LIST into SETTINGS.
3142 ROOT is the root directory of the project.
3143 Return the new settings list."
3144 (let* ((file-name (buffer-file-name))
3145 (sub-file-name (if file-name
3146 (substring file-name
(length root
)))))
3147 (dolist (entry binding-list settings
)
3148 (let ((key (car entry
)))
3151 ;; Don't include this in the previous condition, because we
3152 ;; want to filter all strings before the next condition.
3153 (when (and sub-file-name
3154 (>= (length sub-file-name
) (length key
))
3155 (string= key
(substring sub-file-name
0 (length key
))))
3156 (setq settings
(project-collect-binding-list (cdr entry
)
3159 (derived-mode-p key
))
3160 (setq settings
(project-collect-bindings-from-alist (cdr entry
)
3163 (defun set-directory-project (directory class
)
3164 "Declare that the project rooted at DIRECTORY is an instance of CLASS.
3165 DIRECTORY is the name of a directory, a string.
3166 CLASS is the name of a project class, a symbol.
3168 When a file beneath DIRECTORY is visited, the mode-specific
3169 settings from CLASS will be applied to the buffer. The settings
3170 for a class are defined using `define-project-bindings'."
3171 (setq directory
(file-name-as-directory (expand-file-name directory
)))
3172 (unless (assq class project-class-alist
)
3173 (error "No such project class `%s'" (symbol-name class
)))
3174 (push (cons directory class
) project-directory-alist
))
3176 (defun define-project-bindings (class settings
)
3177 "Map the project type CLASS to a list of variable settings.
3178 CLASS is the project class, a symbol.
3179 SETTINGS is a list that declares variable settings for the class.
3180 An element in SETTINGS is either of the form:
3181 (MAJOR-MODE . ALIST)
3185 In the first form, MAJOR-MODE is a symbol, and ALIST is an alist
3186 whose elements are of the form (VARIABLE . VALUE).
3188 In the second form, DIRECTORY is a directory name (a string), and
3189 LIST is a list of the form accepted by the function.
3191 When a file is visited, the file's class is found. A directory
3192 may be assigned a class using `set-directory-project'. Then
3193 variables are set in the file's buffer according to the class'
3194 LIST. The list is processed in order.
3196 * If the element is of the form (MAJOR-MODE . ALIST), and the
3197 buffer's major mode is derived from MAJOR-MODE (as determined
3198 by `derived-mode-p'), then all the settings in ALIST are
3199 applied. A MAJOR-MODE of nil may be used to match any buffer.
3200 `make-local-variable' is called for each variable before it is
3203 * If the element is of the form (DIRECTORY . LIST), and DIRECTORY
3204 is an initial substring of the file's directory, then LIST is
3205 applied by recursively following these rules."
3206 (let ((elt (assq class project-class-alist
)))
3208 (setcdr elt settings
)
3209 (push (cons class settings
) project-class-alist
))))
3211 (defun project-find-settings-file (file)
3212 "Find the settings file for FILE.
3213 This searches upward in the directory tree.
3214 If a settings file is found, the file name is returned.
3215 If the file is in a registered project, a cons from
3216 `project-directory-alist' is returned.
3217 Otherwise this returns nil."
3218 (setq file
(expand-file-name file
))
3219 (let ((settings (locate-dominating-file file
".dir-settings.el"))
3221 ;; `locate-dominating-file' may have abbreviated the name.
3223 (setq settings
(expand-file-name ".dir-settings.el" settings
)))
3224 (dolist (x project-directory-alist
)
3225 (when (and (eq t
(compare-strings file nil
(length (car x
))
3227 (> (length (car x
)) (length (car pda
))))
3229 (if (and settings pda
)
3230 (if (> (length (file-name-directory settings
))
3233 (or settings pda
))))
3235 (defun project-define-from-project-file (settings-file)
3236 "Load a settings file and register a new project class and instance.
3237 SETTINGS-FILE is the name of the file holding the settings to apply.
3238 The new class name is the same as the directory in which SETTINGS-FILE
3239 is found. Returns the new class name."
3241 ;; We should probably store the modtime of SETTINGS-FILE and then
3242 ;; reload it whenever it changes.
3243 (insert-file-contents settings-file
)
3244 (let* ((dir-name (file-name-directory settings-file
))
3245 (class-name (intern dir-name
))
3246 (list (read (current-buffer))))
3247 (define-project-bindings class-name list
)
3248 (set-directory-project dir-name class-name
)
3251 (declare-function c-postprocess-file-styles
"cc-mode" ())
3253 (defun hack-project-variables ()
3254 "Read local variables for the current buffer based on project settings.
3255 Store the project variables in `file-local-variables-alist',
3256 without applying them."
3257 (when (and enable-local-variables
3259 (not (file-remote-p (buffer-file-name))))
3260 ;; Find the settings file.
3261 (let ((settings (project-find-settings-file (buffer-file-name)))
3266 (setq root-dir
(file-name-directory (buffer-file-name)))
3267 (setq class
(project-define-from-project-file settings
)))
3269 (setq root-dir
(car settings
))
3270 (setq class
(cdr settings
))))
3273 (project-collect-binding-list (project-get-alist class
)
3276 (hack-local-variables-filter bindings root-dir
)))))))
3279 (defcustom change-major-mode-with-file-name t
3280 "Non-nil means \\[write-file] should set the major mode from the file name.
3281 However, the mode will not be changed if
3282 \(1) a local variables list or the `-*-' line specifies a major mode, or
3283 \(2) the current major mode is a \"special\" mode,
3284 \ not suitable for ordinary files, or
3285 \(3) the new file name does not particularly specify any mode."
3287 :group
'editing-basics
)
3289 (defun set-visited-file-name (filename &optional no-query along-with-file
)
3290 "Change name of file visited in current buffer to FILENAME.
3291 This also renames the buffer to correspond to the new file.
3292 The next time the buffer is saved it will go in the newly specified file.
3293 FILENAME nil or an empty string means mark buffer as not visiting any file.
3294 Remember to delete the initial contents of the minibuffer
3295 if you wish to pass an empty string as the argument.
3297 The optional second argument NO-QUERY, if non-nil, inhibits asking for
3298 confirmation in the case where another buffer is already visiting FILENAME.
3300 The optional third argument ALONG-WITH-FILE, if non-nil, means that
3301 the old visited file has been renamed to the new name FILENAME."
3302 (interactive "FSet visited file name: ")
3303 (if (buffer-base-buffer)
3304 (error "An indirect buffer cannot visit a file"))
3308 (if (string-equal filename
"")
3310 (expand-file-name filename
))))
3313 (setq truename
(file-truename filename
))
3314 (if find-file-visit-truename
3315 (setq filename truename
))))
3317 (let ((new-name (file-name-nondirectory filename
)))
3318 (if (string= new-name
"")
3319 (error "Empty file name"))))
3320 (let ((buffer (and filename
(find-buffer-visiting filename
))))
3321 (and buffer
(not (eq buffer
(current-buffer)))
3323 (not (y-or-n-p (format "A buffer is visiting %s; proceed? "
3326 (or (equal filename buffer-file-name
)
3328 (and filename
(lock-buffer filename
))
3330 (setq buffer-file-name filename
)
3331 (if filename
; make buffer name reflect filename.
3332 (let ((new-name (file-name-nondirectory buffer-file-name
)))
3333 (setq default-directory
(file-name-directory buffer-file-name
))
3334 ;; If new-name == old-name, renaming would add a spurious <2>
3335 ;; and it's considered as a feature in rename-buffer.
3336 (or (string= new-name
(buffer-name))
3337 (rename-buffer new-name t
))))
3338 (setq buffer-backed-up nil
)
3340 (clear-visited-file-modtime))
3341 ;; Abbreviate the file names of the buffer.
3344 (setq buffer-file-truename
(abbreviate-file-name truename
))
3345 (if find-file-visit-truename
3346 (setq buffer-file-name truename
))))
3347 (setq buffer-file-number
3349 (nthcdr 10 (file-attributes buffer-file-name
))
3351 ;; write-file-functions is normally used for things like ftp-find-file
3352 ;; that visit things that are not local files as if they were files.
3353 ;; Changing to visit an ordinary local file instead should flush the hook.
3354 (kill-local-variable 'write-file-functions
)
3355 (kill-local-variable 'local-write-file-hooks
)
3356 (kill-local-variable 'revert-buffer-function
)
3357 (kill-local-variable 'backup-inhibited
)
3358 ;; If buffer was read-only because of version control,
3359 ;; that reason is gone now, so make it writable.
3361 (setq buffer-read-only nil
))
3362 (kill-local-variable 'vc-mode
)
3363 ;; Turn off backup files for certain file names.
3364 ;; Since this is a permanent local, the major mode won't eliminate it.
3365 (and buffer-file-name
3366 backup-enable-predicate
3367 (not (funcall backup-enable-predicate buffer-file-name
))
3369 (make-local-variable 'backup-inhibited
)
3370 (setq backup-inhibited t
)))
3371 (let ((oauto buffer-auto-save-file-name
))
3372 ;; If auto-save was not already on, turn it on if appropriate.
3373 (if (not buffer-auto-save-file-name
)
3374 (and buffer-file-name auto-save-default
3376 ;; If auto save is on, start using a new name.
3377 ;; We deliberately don't rename or delete the old auto save
3378 ;; for the old visited file name. This is because perhaps
3379 ;; the user wants to save the new state and then compare with the
3380 ;; previous state from the auto save file.
3381 (setq buffer-auto-save-file-name
3382 (make-auto-save-file-name)))
3383 ;; Rename the old auto save file if any.
3384 (and oauto buffer-auto-save-file-name
3385 (file-exists-p oauto
)
3386 (rename-file oauto buffer-auto-save-file-name t
)))
3387 (and buffer-file-name
3388 (not along-with-file
)
3389 (set-buffer-modified-p t
))
3390 ;; Update the major mode, if the file name determines it.
3392 ;; Don't change the mode if it is special.
3393 (or (not change-major-mode-with-file-name
)
3394 (get major-mode
'mode-class
)
3395 ;; Don't change the mode if the local variable list specifies it.
3396 (hack-local-variables t
)
3400 (defun write-file (filename &optional confirm
)
3401 "Write current buffer into file FILENAME.
3402 This makes the buffer visit that file, and marks it as not modified.
3404 If you specify just a directory name as FILENAME, that means to use
3405 the default file name but in that directory. You can also yank
3406 the default file name into the minibuffer to edit it, using \\<minibuffer-local-map>\\[next-history-element].
3408 If the buffer is not already visiting a file, the default file name
3409 for the output file is the buffer name.
3411 If optional second arg CONFIRM is non-nil, this function
3412 asks for confirmation before overwriting an existing file.
3413 Interactively, confirmation is required unless you supply a prefix argument."
3414 ;; (interactive "FWrite file: ")
3416 (list (if buffer-file-name
3417 (read-file-name "Write file: "
3419 (read-file-name "Write file: " default-directory
3421 (file-name-nondirectory (buffer-name))
3424 (not current-prefix-arg
)))
3425 (or (null filename
) (string-equal filename
"")
3427 ;; If arg is just a directory,
3428 ;; use the default file name, but in that directory.
3429 (if (file-directory-p filename
)
3430 (setq filename
(concat (file-name-as-directory filename
)
3431 (file-name-nondirectory
3432 (or buffer-file-name
(buffer-name))))))
3434 (file-exists-p filename
)
3435 (or (y-or-n-p (format "File `%s' exists; overwrite? " filename
))
3436 (error "Canceled")))
3437 (set-visited-file-name filename
(not confirm
))))
3438 (set-buffer-modified-p t
)
3439 ;; Make buffer writable if file is writable.
3440 (and buffer-file-name
3441 (file-writable-p buffer-file-name
)
3442 (setq buffer-read-only nil
))
3444 ;; It's likely that the VC status at the new location is different from
3445 ;; the one at the old location.
3446 (vc-find-file-hook))
3448 (defun backup-buffer ()
3449 "Make a backup of the disk file visited by the current buffer, if appropriate.
3450 This is normally done before saving the buffer the first time.
3452 A backup may be done by renaming or by copying; see documentation of
3453 variable `make-backup-files'. If it's done by renaming, then the file is
3454 no longer accessible under its old name.
3456 The value is non-nil after a backup was made by renaming.
3457 It has the form (MODES . BACKUPNAME).
3458 MODES is the result of `file-modes' on the original
3459 file; this means that the caller, after saving the buffer, should change
3460 the modes of the new file to agree with the old modes.
3461 BACKUPNAME is the backup file name, which is the old file renamed."
3462 (if (and make-backup-files
(not backup-inhibited
)
3463 (not buffer-backed-up
)
3464 (file-exists-p buffer-file-name
)
3465 (memq (aref (elt (file-attributes buffer-file-name
) 8) 0)
3467 (let ((real-file-name buffer-file-name
)
3468 backup-info backupname targets setmodes
)
3469 ;; If specified name is a symbolic link, chase it to the target.
3470 ;; Thus we make the backups in the directory where the real file is.
3471 (setq real-file-name
(file-chase-links real-file-name
))
3472 (setq backup-info
(find-backup-file-name real-file-name
)
3473 backupname
(car backup-info
)
3474 targets
(cdr backup-info
))
3475 ;; (if (file-directory-p buffer-file-name)
3476 ;; (error "Cannot save buffer in directory %s" buffer-file-name))
3479 (let ((delete-old-versions
3480 ;; If have old versions to maybe delete,
3481 ;; ask the user to confirm now, before doing anything.
3482 ;; But don't actually delete til later.
3484 (or (eq delete-old-versions t
) (eq delete-old-versions nil
))
3485 (or delete-old-versions
3486 (y-or-n-p (format "Delete excess backup versions of %s? "
3488 (modes (file-modes buffer-file-name
)))
3489 ;; Actually write the back up file.
3491 (if (or file-precious-flag
3492 ; (file-symlink-p buffer-file-name)
3494 ;; Don't rename a suid or sgid file.
3495 (and modes
(< 0 (logand modes
#o6000
)))
3496 (not (file-writable-p (file-name-directory real-file-name
)))
3497 (and backup-by-copying-when-linked
3498 (> (file-nlinks real-file-name
) 1))
3499 (and (or backup-by-copying-when-mismatch
3500 (integerp backup-by-copying-when-privileged-mismatch
))
3501 (let ((attr (file-attributes real-file-name
)))
3502 (and (or backup-by-copying-when-mismatch
3503 (and (integerp (nth 2 attr
))
3504 (integerp backup-by-copying-when-privileged-mismatch
)
3505 (<= (nth 2 attr
) backup-by-copying-when-privileged-mismatch
)))
3507 (not (file-ownership-preserved-p real-file-name
)))))))
3508 (backup-buffer-copy real-file-name backupname modes
)
3509 ;; rename-file should delete old backup.
3510 (rename-file real-file-name backupname t
)
3511 (setq setmodes
(cons modes backupname
)))
3513 ;; If trouble writing the backup, write it in ~.
3514 (setq backupname
(expand-file-name
3515 (convert-standard-filename
3517 (message "Cannot write backup file; backing up in %s"
3520 (backup-buffer-copy real-file-name backupname modes
)))
3521 (setq buffer-backed-up t
)
3522 ;; Now delete the old versions, if desired.
3523 (if delete-old-versions
3526 (delete-file (car targets
))
3528 (setq targets
(cdr targets
))))
3530 (file-error nil
))))))
3532 (defun backup-buffer-copy (from-name to-name modes
)
3533 (let ((umask (default-file-modes)))
3536 ;; Create temp files with strict access rights. It's easy to
3537 ;; loosen them later, whereas it's impossible to close the
3538 ;; time-window of loose permissions otherwise.
3539 (set-default-file-modes ?
\700)
3540 (when (condition-case nil
3541 ;; Try to overwrite old backup first.
3542 (copy-file from-name to-name t t t
)
3544 (while (condition-case nil
3546 (when (file-exists-p to-name
)
3547 (delete-file to-name
))
3548 (copy-file from-name to-name nil t t
)
3550 (file-already-exists t
))
3551 ;; The file was somehow created by someone else between
3552 ;; `delete-file' and `copy-file', so let's try again.
3553 ;; rms says "I think there is also a possible race
3554 ;; condition for making backup files" (emacs-devel 20070821).
3557 (set-default-file-modes umask
)))
3559 (set-file-modes to-name
(logand modes
#o1777
))))
3561 (defun file-name-sans-versions (name &optional keep-backup-version
)
3562 "Return file NAME sans backup versions or strings.
3563 This is a separate procedure so your site-init or startup file can
3565 If the optional argument KEEP-BACKUP-VERSION is non-nil,
3566 we do not remove backup version numbers, only true file version numbers."
3567 (let ((handler (find-file-name-handler name
'file-name-sans-versions
)))
3569 (funcall handler
'file-name-sans-versions name keep-backup-version
)
3571 (if keep-backup-version
3573 (or (string-match "\\.~[-[:alnum:]:#@^._]+~\\'" name
)
3574 (string-match "~\\'" name
)
3577 (defun file-ownership-preserved-p (file)
3578 "Return t if deleting FILE and rewriting it would preserve the owner."
3579 (let ((handler (find-file-name-handler file
'file-ownership-preserved-p
)))
3581 (funcall handler
'file-ownership-preserved-p file
)
3582 (let ((attributes (file-attributes file
)))
3583 ;; Return t if the file doesn't exist, since it's true that no
3584 ;; information would be lost by an (attempted) delete and create.
3585 (or (null attributes
)
3586 (= (nth 2 attributes
) (user-uid)))))))
3588 (defun file-name-sans-extension (filename)
3589 "Return FILENAME sans final \"extension\".
3590 The extension, in a file name, is the part that follows the last `.',
3591 except that a leading `.', if any, doesn't count."
3593 (let ((file (file-name-sans-versions (file-name-nondirectory filename
)))
3595 (if (and (string-match "\\.[^.]*\\'" file
)
3596 (not (eq 0 (match-beginning 0))))
3597 (if (setq directory
(file-name-directory filename
))
3598 ;; Don't use expand-file-name here; if DIRECTORY is relative,
3599 ;; we don't want to expand it.
3600 (concat directory
(substring file
0 (match-beginning 0)))
3601 (substring file
0 (match-beginning 0)))
3604 (defun file-name-extension (filename &optional period
)
3605 "Return FILENAME's final \"extension\".
3606 The extension, in a file name, is the part that follows the last `.',
3607 excluding version numbers and backup suffixes,
3608 except that a leading `.', if any, doesn't count.
3609 Return nil for extensionless file names such as `foo'.
3610 Return the empty string for file names such as `foo.'.
3612 If PERIOD is non-nil, then the returned value includes the period
3613 that delimits the extension, and if FILENAME has no extension,
3616 (let ((file (file-name-sans-versions (file-name-nondirectory filename
))))
3617 (if (and (string-match "\\.[^.]*\\'" file
)
3618 (not (eq 0 (match-beginning 0))))
3619 (substring file
(+ (match-beginning 0) (if period
0 1)))
3623 (defcustom make-backup-file-name-function nil
3624 "A function to use instead of the default `make-backup-file-name'.
3625 A value of nil gives the default `make-backup-file-name' behavior.
3627 This could be buffer-local to do something special for specific
3628 files. If you define it, you may need to change `backup-file-name-p'
3629 and `file-name-sans-versions' too.
3631 See also `backup-directory-alist'."
3633 :type
'(choice (const :tag
"Default" nil
)
3634 (function :tag
"Your function")))
3636 (defcustom backup-directory-alist nil
3637 "Alist of filename patterns and backup directory names.
3638 Each element looks like (REGEXP . DIRECTORY). Backups of files with
3639 names matching REGEXP will be made in DIRECTORY. DIRECTORY may be
3640 relative or absolute. If it is absolute, so that all matching files
3641 are backed up into the same directory, the file names in this
3642 directory will be the full name of the file backed up with all
3643 directory separators changed to `!' to prevent clashes. This will not
3644 work correctly if your filesystem truncates the resulting name.
3646 For the common case of all backups going into one directory, the alist
3647 should contain a single element pairing \".\" with the appropriate
3650 If this variable is nil, or it fails to match a filename, the backup
3651 is made in the original file's directory.
3653 On MS-DOS filesystems without long names this variable is always
3656 :type
'(repeat (cons (regexp :tag
"Regexp matching filename")
3657 (directory :tag
"Backup directory name"))))
3659 (defun normal-backup-enable-predicate (name)
3660 "Default `backup-enable-predicate' function.
3661 Checks for files in `temporary-file-directory',
3662 `small-temporary-file-directory', and /tmp."
3663 (not (or (let ((comp (compare-strings temporary-file-directory
0 nil
3665 ;; Directory is under temporary-file-directory.
3666 (and (not (eq comp t
))
3667 (< comp
(- (length temporary-file-directory
)))))
3668 (let ((comp (compare-strings "/tmp" 0 nil
3670 ;; Directory is under /tmp.
3671 (and (not (eq comp t
))
3672 (< comp
(- (length "/tmp")))))
3673 (if small-temporary-file-directory
3674 (let ((comp (compare-strings small-temporary-file-directory
3677 ;; Directory is under small-temporary-file-directory.
3678 (and (not (eq comp t
))
3679 (< comp
(- (length small-temporary-file-directory
)))))))))
3681 (defun make-backup-file-name (file)
3682 "Create the non-numeric backup file name for FILE.
3683 Normally this will just be the file's name with `~' appended.
3684 Customization hooks are provided as follows.
3686 If the variable `make-backup-file-name-function' is non-nil, its value
3687 should be a function which will be called with FILE as its argument;
3688 the resulting name is used.
3690 Otherwise a match for FILE is sought in `backup-directory-alist'; see
3691 the documentation of that variable. If the directory for the backup
3692 doesn't exist, it is created."
3693 (if make-backup-file-name-function
3694 (funcall make-backup-file-name-function file
)
3695 (if (and (eq system-type
'ms-dos
)
3696 (not (msdos-long-file-names)))
3697 (let ((fn (file-name-nondirectory file
)))
3698 (concat (file-name-directory file
)
3699 (or (and (string-match "\\`[^.]+\\'" fn
)
3700 (concat (match-string 0 fn
) ".~"))
3701 (and (string-match "\\`[^.]+\\.\\(..?\\)?" fn
)
3702 (concat (match-string 0 fn
) "~")))))
3703 (concat (make-backup-file-name-1 file
) "~"))))
3705 (defun make-backup-file-name-1 (file)
3706 "Subroutine of `make-backup-file-name' and `find-backup-file-name'."
3707 (let ((alist backup-directory-alist
)
3708 elt backup-directory abs-backup-directory
)
3710 (setq elt
(pop alist
))
3711 (if (string-match (car elt
) file
)
3712 (setq backup-directory
(cdr elt
)
3714 ;; If backup-directory is relative, it should be relative to the
3715 ;; file's directory. By expanding explicitly here, we avoid
3716 ;; depending on default-directory.
3717 (if backup-directory
3718 (setq abs-backup-directory
3719 (expand-file-name backup-directory
3720 (file-name-directory file
))))
3721 (if (and abs-backup-directory
(not (file-exists-p abs-backup-directory
)))
3723 (make-directory abs-backup-directory
'parents
)
3724 (file-error (setq backup-directory nil
3725 abs-backup-directory nil
))))
3726 (if (null backup-directory
)
3728 (if (file-name-absolute-p backup-directory
)
3730 (when (memq system-type
'(windows-nt ms-dos cygwin
))
3731 ;; Normalize DOSish file names: downcase the drive
3732 ;; letter, if any, and replace the leading "x:" with
3734 (or (file-name-absolute-p file
)
3735 (setq file
(expand-file-name file
))) ; make defaults explicit
3736 ;; Replace any invalid file-name characters (for the
3737 ;; case of backing up remote files).
3738 (setq file
(expand-file-name (convert-standard-filename file
)))
3739 (if (eq (aref file
1) ?
:)
3740 (setq file
(concat "/"
3742 (char-to-string (downcase (aref file
0)))
3743 (if (eq (aref file
2) ?
/)
3746 (substring file
2)))))
3747 ;; Make the name unique by substituting directory
3748 ;; separators. It may not really be worth bothering about
3749 ;; doubling `!'s in the original name...
3751 (subst-char-in-string
3753 (replace-regexp-in-string "!" "!!" file
))
3755 (expand-file-name (file-name-nondirectory file
)
3756 (file-name-as-directory abs-backup-directory
))))))
3758 (defun backup-file-name-p (file)
3759 "Return non-nil if FILE is a backup file name (numeric or not).
3760 This is a separate function so you can redefine it for customization.
3761 You may need to redefine `file-name-sans-versions' as well."
3762 (string-match "~\\'" file
))
3764 (defvar backup-extract-version-start
)
3766 ;; This is used in various files.
3767 ;; The usage of backup-extract-version-start is not very clean,
3768 ;; but I can't see a good alternative, so as of now I am leaving it alone.
3769 (defun backup-extract-version (fn)
3770 "Given the name of a numeric backup file, FN, return the backup number.
3771 Uses the free variable `backup-extract-version-start', whose value should be
3772 the index in the name where the version number begins."
3773 (if (and (string-match "[0-9]+~/?$" fn backup-extract-version-start
)
3774 (= (match-beginning 0) backup-extract-version-start
))
3775 (string-to-number (substring fn backup-extract-version-start -
1))
3778 (defun find-backup-file-name (fn)
3779 "Find a file name for a backup file FN, and suggestions for deletions.
3780 Value is a list whose car is the name for the backup file
3781 and whose cdr is a list of old versions to consider deleting now.
3782 If the value is nil, don't make a backup.
3783 Uses `backup-directory-alist' in the same way as does
3784 `make-backup-file-name'."
3785 (let ((handler (find-file-name-handler fn
'find-backup-file-name
)))
3786 ;; Run a handler for this function so that ange-ftp can refuse to do it.
3788 (funcall handler
'find-backup-file-name fn
)
3789 (if (or (eq version-control
'never
)
3790 ;; We don't support numbered backups on plain MS-DOS
3791 ;; when long file names are unavailable.
3792 (and (eq system-type
'ms-dos
)
3793 (not (msdos-long-file-names))))
3794 (list (make-backup-file-name fn
))
3795 (let* ((basic-name (make-backup-file-name-1 fn
))
3796 (base-versions (concat (file-name-nondirectory basic-name
)
3798 (backup-extract-version-start (length base-versions
))
3800 (number-to-delete 0)
3801 possibilities deserve-versions-p versions
)
3803 (setq possibilities
(file-name-all-completions
3805 (file-name-directory basic-name
))
3806 versions
(sort (mapcar #'backup-extract-version
3809 high-water-mark
(apply 'max
0 versions
)
3810 deserve-versions-p
(or version-control
3811 (> high-water-mark
0))
3812 number-to-delete
(- (length versions
)
3816 (file-error (setq possibilities nil
)))
3817 (if (not deserve-versions-p
)
3818 (list (make-backup-file-name fn
))
3819 (cons (format "%s.~%d~" basic-name
(1+ high-water-mark
))
3820 (if (and (> number-to-delete
0)
3821 ;; Delete nothing if there is overflow
3822 ;; in the number of versions to keep.
3823 (>= (+ kept-new-versions kept-old-versions -
1) 0))
3825 (format "%s.~%d~" basic-name n
))
3826 (let ((v (nthcdr kept-old-versions versions
)))
3827 (rplacd (nthcdr (1- number-to-delete
) v
) ())
3830 (defun file-nlinks (filename)
3831 "Return number of names file FILENAME has."
3832 (car (cdr (file-attributes filename
))))
3834 ;; (defun file-relative-name (filename &optional directory)
3835 ;; "Convert FILENAME to be relative to DIRECTORY (default: `default-directory').
3836 ;; This function returns a relative file name which is equivalent to FILENAME
3837 ;; when used with that default directory as the default.
3838 ;; If this is impossible (which can happen on MSDOS and Windows
3839 ;; when the file name and directory use different drive names)
3840 ;; then it returns FILENAME."
3842 ;; (let ((fname (expand-file-name filename)))
3843 ;; (setq directory (file-name-as-directory
3844 ;; (expand-file-name (or directory default-directory))))
3845 ;; ;; On Microsoft OSes, if FILENAME and DIRECTORY have different
3846 ;; ;; drive names, they can't be relative, so return the absolute name.
3847 ;; (if (and (or (eq system-type 'ms-dos)
3848 ;; (eq system-type 'cygwin)
3849 ;; (eq system-type 'windows-nt))
3850 ;; (not (string-equal (substring fname 0 2)
3851 ;; (substring directory 0 2))))
3853 ;; (let ((ancestor ".")
3854 ;; (fname-dir (file-name-as-directory fname)))
3855 ;; (while (and (not (string-match (concat "^" (regexp-quote directory)) fname-dir))
3856 ;; (not (string-match (concat "^" (regexp-quote directory)) fname)))
3857 ;; (setq directory (file-name-directory (substring directory 0 -1))
3858 ;; ancestor (if (equal ancestor ".")
3860 ;; (concat "../" ancestor))))
3861 ;; ;; Now ancestor is empty, or .., or ../.., etc.
3862 ;; (if (string-match (concat "^" (regexp-quote directory)) fname)
3863 ;; ;; We matched within FNAME's directory part.
3864 ;; ;; Add the rest of FNAME onto ANCESTOR.
3865 ;; (let ((rest (substring fname (match-end 0))))
3866 ;; (if (and (equal ancestor ".")
3867 ;; (not (equal rest "")))
3868 ;; ;; But don't bother with ANCESTOR if it would give us `./'.
3870 ;; (concat (file-name-as-directory ancestor) rest)))
3871 ;; ;; We matched FNAME's directory equivalent.
3874 (defun file-relative-name (filename &optional directory
)
3875 "Convert FILENAME to be relative to DIRECTORY (default: `default-directory').
3876 This function returns a relative file name which is equivalent to FILENAME
3877 when used with that default directory as the default.
3878 If FILENAME and DIRECTORY lie on different machines or on different drives
3879 on a DOS/Windows machine, it returns FILENAME in expanded form."
3882 (file-name-as-directory (expand-file-name (or directory
3883 default-directory
))))
3884 (setq filename
(expand-file-name filename
))
3885 (let ((fremote (file-remote-p filename
))
3886 (dremote (file-remote-p directory
)))
3887 (if ;; Conditions for separate trees
3889 ;; Test for different drives on DOS/Windows
3891 ;; Should `cygwin' really be included here? --stef
3892 (memq system-type
'(ms-dos cygwin windows-nt
))
3893 (not (eq t
(compare-strings filename
0 2 directory
0 2))))
3894 ;; Test for different remote file system identification
3895 (not (equal fremote dremote
)))
3897 (let ((ancestor ".")
3898 (filename-dir (file-name-as-directory filename
)))
3901 (eq t
(compare-strings filename-dir nil
(length directory
)
3902 directory nil nil case-fold-search
))
3903 (eq t
(compare-strings filename nil
(length directory
)
3904 directory nil nil case-fold-search
))))
3905 (setq directory
(file-name-directory (substring directory
0 -
1))
3906 ancestor
(if (equal ancestor
".")
3908 (concat "../" ancestor
))))
3909 ;; Now ancestor is empty, or .., or ../.., etc.
3910 (if (eq t
(compare-strings filename nil
(length directory
)
3911 directory nil nil case-fold-search
))
3912 ;; We matched within FILENAME's directory part.
3913 ;; Add the rest of FILENAME onto ANCESTOR.
3914 (let ((rest (substring filename
(length directory
))))
3915 (if (and (equal ancestor
".") (not (equal rest
"")))
3916 ;; But don't bother with ANCESTOR if it would give us `./'.
3918 (concat (file-name-as-directory ancestor
) rest
)))
3919 ;; We matched FILENAME's directory equivalent.
3922 (defun save-buffer (&optional args
)
3923 "Save current buffer in visited file if modified.
3924 Variations are described below.
3926 By default, makes the previous version into a backup file
3927 if previously requested or if this is the first save.
3928 Prefixed with one \\[universal-argument], marks this version
3929 to become a backup when the next save is done.
3930 Prefixed with two \\[universal-argument]'s,
3931 unconditionally makes the previous version into a backup file.
3932 Prefixed with three \\[universal-argument]'s, marks this version
3933 to become a backup when the next save is done,
3934 and unconditionally makes the previous version into a backup file.
3936 With a numeric argument of 0, never make the previous version
3939 If a file's name is FOO, the names of its numbered backup versions are
3940 FOO.~i~ for various integers i. A non-numbered backup file is called FOO~.
3941 Numeric backups (rather than FOO~) will be made if value of
3942 `version-control' is not the atom `never' and either there are already
3943 numeric versions of the file being backed up, or `version-control' is
3945 We don't want excessive versions piling up, so there are variables
3946 `kept-old-versions', which tells Emacs how many oldest versions to keep,
3947 and `kept-new-versions', which tells how many newest versions to keep.
3948 Defaults are 2 old versions and 2 new.
3949 `dired-kept-versions' controls dired's clean-directory (.) command.
3950 If `delete-old-versions' is nil, system will query user
3951 before trimming versions. Otherwise it does it silently.
3953 If `vc-make-backup-files' is nil, which is the default,
3954 no backup files are made for files managed by version control.
3955 (This is because the version control system itself records previous versions.)
3957 See the subroutine `basic-save-buffer' for more information."
3959 (let ((modp (buffer-modified-p))
3960 (large (> (buffer-size) 50000))
3961 (make-backup-files (or (and make-backup-files
(not (eq args
0)))
3962 (memq args
'(16 64)))))
3963 (and modp
(memq args
'(16 64)) (setq buffer-backed-up nil
))
3964 (if (and modp large
(buffer-file-name))
3965 (message "Saving file %s..." (buffer-file-name)))
3967 (and modp
(memq args
'(4 64)) (setq buffer-backed-up nil
))))
3969 (defun delete-auto-save-file-if-necessary (&optional force
)
3970 "Delete auto-save file for current buffer if `delete-auto-save-files' is t.
3971 Normally delete only if the file was written by this Emacs since
3972 the last real save, but optional arg FORCE non-nil means delete anyway."
3973 (and buffer-auto-save-file-name delete-auto-save-files
3974 (not (string= buffer-file-name buffer-auto-save-file-name
))
3975 (or force
(recent-auto-save-p))
3978 (delete-file buffer-auto-save-file-name
)
3980 (set-buffer-auto-saved))))
3982 (defvar auto-save-hook nil
3983 "Normal hook run just before auto-saving.")
3985 (defcustom before-save-hook nil
3986 "Normal hook that is run before a buffer is saved to its file."
3987 :options
'(copyright-update time-stamp
)
3991 (defcustom after-save-hook nil
3992 "Normal hook that is run after a buffer is saved to its file."
3993 :options
'(executable-make-buffer-file-executable-if-script-p)
3997 (defvar save-buffer-coding-system nil
3998 "If non-nil, use this coding system for saving the buffer.
3999 More precisely, use this coding system in place of the
4000 value of `buffer-file-coding-system', when saving the buffer.
4001 Calling `write-region' for any purpose other than saving the buffer
4002 will still use `buffer-file-coding-system'; this variable has no effect
4005 (make-variable-buffer-local 'save-buffer-coding-system
)
4006 (put 'save-buffer-coding-system
'permanent-local t
)
4008 (defun basic-save-buffer ()
4009 "Save the current buffer in its visited file, if it has been modified.
4010 The hooks `write-contents-functions' and `write-file-functions' get a chance
4011 to do the job of saving; if they do not, then the buffer is saved in
4012 the visited file in the usual way.
4013 Before and after saving the buffer, this function runs
4014 `before-save-hook' and `after-save-hook', respectively."
4016 (save-current-buffer
4017 ;; In an indirect buffer, save its base buffer instead.
4018 (if (buffer-base-buffer)
4019 (set-buffer (buffer-base-buffer)))
4020 (if (buffer-modified-p)
4021 (let ((recent-save (recent-auto-save-p))
4023 ;; If buffer has no file name, ask user for one.
4024 (or buffer-file-name
4027 (read-file-name "File to save in: ") nil
)))
4028 (if (file-exists-p filename
)
4029 (if (file-directory-p filename
)
4030 ;; Signal an error if the user specified the name of an
4031 ;; existing directory.
4032 (error "%s is a directory" filename
)
4033 (unless (y-or-n-p (format "File `%s' exists; overwrite? "
4035 (error "Canceled")))
4036 ;; Signal an error if the specified name refers to a
4037 ;; non-existing directory.
4038 (let ((dir (file-name-directory filename
)))
4039 (unless (file-directory-p dir
)
4040 (if (file-exists-p dir
)
4041 (error "%s is not a directory" dir
)
4042 (error "%s: no such directory" dir
)))))
4043 (set-visited-file-name filename
)))
4044 (or (verify-visited-file-modtime (current-buffer))
4045 (not (file-exists-p buffer-file-name
))
4047 (format "%s has changed since visited or saved. Save anyway? "
4048 (file-name-nondirectory buffer-file-name
)))
4049 (error "Save not confirmed"))
4053 (and (> (point-max) (point-min))
4054 (not find-file-literally
)
4055 (/= (char-after (1- (point-max))) ?
\n)
4056 (not (and (eq selective-display t
)
4057 (= (char-after (1- (point-max))) ?
\r)))
4058 (or (eq require-final-newline t
)
4059 (eq require-final-newline
'visit-save
)
4060 (and require-final-newline
4062 (format "Buffer %s does not end in newline. Add one? "
4065 (goto-char (point-max))
4067 ;; Support VC version backups.
4069 (run-hooks 'before-save-hook
)
4070 (or (run-hook-with-args-until-success 'write-contents-functions
)
4071 (run-hook-with-args-until-success 'local-write-file-hooks
)
4072 (run-hook-with-args-until-success 'write-file-functions
)
4073 ;; If a hook returned t, file is already "written".
4074 ;; Otherwise, write it the usual way now.
4075 (setq setmodes
(basic-save-buffer-1)))
4076 ;; Now we have saved the current buffer. Let's make sure
4077 ;; that buffer-file-coding-system is fixed to what
4078 ;; actually used for saving by binding it locally.
4079 (if save-buffer-coding-system
4080 (setq save-buffer-coding-system last-coding-system-used
)
4081 (setq buffer-file-coding-system last-coding-system-used
))
4082 (setq buffer-file-number
4083 (nthcdr 10 (file-attributes buffer-file-name
)))
4086 (set-file-modes buffer-file-name
(car setmodes
))
4088 ;; If the auto-save file was recent before this command,
4090 (delete-auto-save-file-if-necessary recent-save
)
4091 ;; Support VC `implicit' locking.
4093 (run-hooks 'after-save-hook
))
4094 (message "(No changes need to be saved)"))))
4096 ;; This does the "real job" of writing a buffer into its visited file
4097 ;; and making a backup file. This is what is normally done
4098 ;; but inhibited if one of write-file-functions returns non-nil.
4099 ;; It returns a value (MODES . BACKUPNAME), like backup-buffer.
4100 (defun basic-save-buffer-1 ()
4102 (if save-buffer-coding-system
4103 (let ((coding-system-for-write save-buffer-coding-system
))
4104 (basic-save-buffer-2))
4105 (basic-save-buffer-2))
4106 (setq buffer-file-coding-system-explicit last-coding-system-used
)))
4108 ;; This returns a value (MODES . BACKUPNAME), like backup-buffer.
4109 (defun basic-save-buffer-2 ()
4110 (let (tempsetmodes setmodes
)
4111 (if (not (file-writable-p buffer-file-name
))
4112 (let ((dir (file-name-directory buffer-file-name
)))
4113 (if (not (file-directory-p dir
))
4114 (if (file-exists-p dir
)
4115 (error "%s is not a directory" dir
)
4116 (error "%s: no such directory" dir
))
4117 (if (not (file-exists-p buffer-file-name
))
4118 (error "Directory %s write-protected" dir
)
4120 (format "File %s is write-protected; try to save anyway? "
4121 (file-name-nondirectory
4123 (setq tempsetmodes t
)
4124 (error "Attempt to save to a file which you aren't allowed to write"))))))
4125 (or buffer-backed-up
4126 (setq setmodes
(backup-buffer)))
4127 (let ((dir (file-name-directory buffer-file-name
)))
4128 (if (and file-precious-flag
4129 (file-writable-p dir
))
4130 ;; If file is precious, write temp name, then rename it.
4131 ;; This requires write access to the containing dir,
4132 ;; which is why we don't try it if we don't have that access.
4133 (let ((realname buffer-file-name
)
4135 (umask (default-file-modes))
4136 (old-modtime (visited-file-modtime)))
4137 ;; Create temp files with strict access rights. It's easy to
4138 ;; loosen them later, whereas it's impossible to close the
4139 ;; time-window of loose permissions otherwise.
4142 (clear-visited-file-modtime)
4143 (set-default-file-modes ?
\700)
4144 ;; Try various temporary names.
4145 ;; This code follows the example of make-temp-file,
4146 ;; but it calls write-region in the appropriate way
4147 ;; for saving the buffer.
4148 (while (condition-case ()
4152 (expand-file-name "tmp" dir
)))
4153 ;; Pass in nil&nil rather than point-min&max
4154 ;; cause we're saving the whole buffer.
4155 ;; write-region-annotate-functions may use it.
4156 (write-region nil nil
4157 tempname nil realname
4158 buffer-file-truename
'excl
)
4160 (file-already-exists t
))
4161 ;; The file was somehow created by someone else between
4162 ;; `make-temp-name' and `write-region', let's try again.
4166 (set-default-file-modes umask
)
4167 ;; If we failed, restore the buffer's modtime.
4169 (set-visited-file-modtime old-modtime
)))
4170 ;; Since we have created an entirely new file,
4171 ;; make sure it gets the right permission bits set.
4172 (setq setmodes
(or setmodes
4173 (cons (or (file-modes buffer-file-name
)
4174 (logand ?
\666 umask
))
4176 ;; We succeeded in writing the temp file,
4178 (rename-file tempname buffer-file-name t
))
4179 ;; If file not writable, see if we can make it writable
4180 ;; temporarily while we write it.
4181 ;; But no need to do so if we have just backed it up
4182 ;; (setmodes is set) because that says we're superseding.
4183 (cond ((and tempsetmodes
(not setmodes
))
4184 ;; Change the mode back, after writing.
4185 (setq setmodes
(cons (file-modes buffer-file-name
) buffer-file-name
))
4186 (set-file-modes buffer-file-name
(logior (car setmodes
) 128))))
4190 ;; Pass in nil&nil rather than point-min&max to indicate
4191 ;; we're saving the buffer rather than just a region.
4192 ;; write-region-annotate-functions may make us of it.
4193 (write-region nil nil
4194 buffer-file-name nil t buffer-file-truename
)
4196 ;; If we get an error writing the new file, and we made
4197 ;; the backup by renaming, undo the backing-up.
4198 (and setmodes
(not success
)
4200 (rename-file (cdr setmodes
) buffer-file-name t
)
4201 (setq buffer-backed-up nil
)))))))
4204 (defun diff-buffer-with-file (&optional buffer
)
4205 "View the differences between BUFFER and its associated file.
4206 This requires the external program `diff' to be in your `exec-path'."
4207 (interactive "bBuffer: ")
4208 (with-current-buffer (get-buffer (or buffer
(current-buffer)))
4209 (if (and buffer-file-name
4210 (file-exists-p buffer-file-name
))
4211 (let ((tempfile (make-temp-file "buffer-content-")))
4214 (write-region nil nil tempfile nil
'nomessage
)
4215 (diff buffer-file-name tempfile nil t
)
4217 (when (file-exists-p tempfile
)
4218 (delete-file tempfile
))))
4219 (message "Buffer %s has no associated file on disc" (buffer-name))
4220 ;; Display that message for 1 second so that user can read it
4221 ;; in the minibuffer.
4223 ;; return always nil, so that save-buffers-kill-emacs will not move
4224 ;; over to the next unsaved buffer when calling `d'.
4227 (defvar save-some-buffers-action-alist
4230 (if (not enable-recursive-minibuffers
)
4231 (progn (display-buffer buf
)
4232 (setq other-window-scroll-buffer buf
))
4233 (view-buffer buf
(lambda (_) (exit-recursive-edit)))
4235 ;; Return nil to ask about BUF again.
4239 (if (null buffer-file-name
)
4240 (message "Not applicable: no file")
4241 (save-window-excursion (diff-buffer-with-file buf
))
4242 (if (not enable-recursive-minibuffers
)
4243 (progn (display-buffer (get-buffer-create "*Diff*"))
4244 (setq other-window-scroll-buffer
"*Diff*"))
4245 (view-buffer (get-buffer-create "*Diff*")
4246 (lambda (_) (exit-recursive-edit)))
4248 ;; Return nil to ask about BUF again.
4250 "view changes in this buffer"))
4251 "ACTION-ALIST argument used in call to `map-y-or-n-p'.")
4253 (defvar buffer-save-without-query nil
4254 "Non-nil means `save-some-buffers' should save this buffer without asking.")
4255 (make-variable-buffer-local 'buffer-save-without-query
)
4257 (defun save-some-buffers (&optional arg pred
)
4258 "Save some modified file-visiting buffers. Asks user about each one.
4259 You can answer `y' to save, `n' not to save, `C-r' to look at the
4260 buffer in question with `view-buffer' before deciding or `d' to
4261 view the differences using `diff-buffer-with-file'.
4263 Optional argument (the prefix) non-nil means save all with no questions.
4264 Optional second argument PRED determines which buffers are considered:
4265 If PRED is nil, all the file-visiting buffers are considered.
4266 If PRED is t, then certain non-file buffers will also be considered.
4267 If PRED is a zero-argument function, it indicates for each buffer whether
4268 to consider it or not when called with that buffer current.
4270 See `save-some-buffers-action-alist' if you want to
4271 change the additional actions you can take on files."
4273 (save-window-excursion
4274 (let* (queried some-automatic
4275 files-done abbrevs-done
)
4276 (dolist (buffer (buffer-list))
4277 ;; First save any buffers that we're supposed to save unconditionally.
4278 ;; That way the following code won't ask about them.
4279 (with-current-buffer buffer
4280 (when (and buffer-save-without-query
(buffer-modified-p))
4281 (setq some-automatic t
)
4283 ;; Ask about those buffers that merit it,
4284 ;; and record the number thus saved.
4288 (and (buffer-modified-p buffer
)
4289 (not (buffer-base-buffer buffer
))
4291 (buffer-file-name buffer
)
4295 (and buffer-offer-save
(> (buffer-size) 0)))))
4296 (or (not (functionp pred
))
4297 (with-current-buffer buffer
(funcall pred
)))
4301 (if (buffer-file-name buffer
)
4302 (format "Save file %s? "
4303 (buffer-file-name buffer
))
4304 (format "Save buffer %s? "
4305 (buffer-name buffer
))))))
4307 (with-current-buffer buffer
4310 '("buffer" "buffers" "save")
4311 save-some-buffers-action-alist
))
4312 ;; Maybe to save abbrevs, and record whether
4313 ;; we either saved them or asked to.
4314 (and save-abbrevs abbrevs-changed
4317 (eq save-abbrevs
'silently
)
4318 (y-or-n-p (format "Save abbrevs in %s? "
4320 (write-abbrev-file nil
))
4321 ;; Don't keep bothering user if he says no.
4322 (setq abbrevs-changed nil
)
4323 (setq abbrevs-done t
)))
4324 (or queried
(> files-done
0) abbrevs-done
4325 (message (if some-automatic
4326 "(Some special files were saved without asking)"
4327 "(No files need saving)"))))))
4329 (defun not-modified (&optional arg
)
4330 "Mark current buffer as unmodified, not needing to be saved.
4331 With prefix ARG, mark buffer as modified, so \\[save-buffer] will save.
4333 It is not a good idea to use this function in Lisp programs, because it
4334 prints a message in the minibuffer. Instead, use `set-buffer-modified-p'."
4336 (message (if arg
"Modification-flag set"
4337 "Modification-flag cleared"))
4338 (set-buffer-modified-p arg
))
4340 (defun toggle-read-only (&optional arg
)
4341 "Change whether this buffer is visiting its file read-only.
4342 With prefix argument ARG, make the buffer read-only if ARG is
4343 positive, otherwise make it writable. If visiting file read-only
4344 and `view-read-only' is non-nil, enter view mode."
4347 (if (> (prefix-numeric-value arg
) 0) buffer-read-only
4348 (not buffer-read-only
))) ; If buffer-read-only is set correctly,
4352 ((and buffer-read-only view-mode
)
4353 (View-exit-and-edit)
4354 (make-local-variable 'view-read-only
)
4355 (setq view-read-only t
)) ; Must leave view mode.
4356 ((and (not buffer-read-only
) view-read-only
4357 ;; If view-mode is already active, `view-mode-enter' is a nop.
4359 (not (eq (get major-mode
'mode-class
) 'special
)))
4361 (t (setq buffer-read-only
(not buffer-read-only
))
4362 (force-mode-line-update)))
4363 (if (vc-backend buffer-file-name
)
4364 (message "%s" (substitute-command-keys
4365 (concat "File is under version-control; "
4366 "use \\[vc-next-action] to check in/out"))))))
4368 (defun insert-file (filename)
4369 "Insert contents of file FILENAME into buffer after point.
4370 Set mark after the inserted text.
4372 This function is meant for the user to run interactively.
4373 Don't call it from programs! Use `insert-file-contents' instead.
4374 \(Its calling sequence is different; see its documentation)."
4375 (interactive "*fInsert file: ")
4376 (insert-file-1 filename
#'insert-file-contents
))
4378 (defun append-to-file (start end filename
)
4379 "Append the contents of the region to the end of file FILENAME.
4380 When called from a function, expects three arguments,
4381 START, END and FILENAME. START and END are buffer positions
4382 saying what text to write."
4383 (interactive "r\nFAppend to file: ")
4384 (write-region start end filename t
))
4386 (defun file-newest-backup (filename)
4387 "Return most recent backup file for FILENAME or nil if no backups exist."
4388 ;; `make-backup-file-name' will get us the right directory for
4389 ;; ordinary or numeric backups. It might create a directory for
4390 ;; backups as a side-effect, according to `backup-directory-alist'.
4391 (let* ((filename (file-name-sans-versions
4392 (make-backup-file-name (expand-file-name filename
))))
4393 (file (file-name-nondirectory filename
))
4394 (dir (file-name-directory filename
))
4395 (comp (file-name-all-completions file dir
))
4399 (setq tem
(pop comp
))
4400 (cond ((and (backup-file-name-p tem
)
4401 (string= (file-name-sans-versions tem
) file
))
4402 (setq tem
(concat dir tem
))
4403 (if (or (null newest
)
4404 (file-newer-than-file-p tem newest
))
4405 (setq newest tem
)))))
4408 (defun rename-uniquely ()
4409 "Rename current buffer to a similar name not already taken.
4410 This function is useful for creating multiple shell process buffers
4411 or multiple mail buffers, etc."
4414 (let ((base-name (buffer-name)))
4415 (and (string-match "<[0-9]+>\\'" base-name
)
4416 (not (and buffer-file-name
4418 (file-name-nondirectory buffer-file-name
))))
4419 ;; If the existing buffer name has a <NNN>,
4420 ;; which isn't part of the file name (if any),
4421 ;; then get rid of that.
4422 (setq base-name
(substring base-name
0 (match-beginning 0))))
4423 (rename-buffer (generate-new-buffer-name base-name
))
4424 (force-mode-line-update))))
4426 (defun make-directory (dir &optional parents
)
4427 "Create the directory DIR and any nonexistent parent dirs.
4428 If DIR already exists as a directory, signal an error, unless PARENTS is set.
4430 Interactively, the default choice of directory to create
4431 is the current default directory for file names.
4432 That is useful when you have visited a file in a nonexistent directory.
4434 Noninteractively, the second (optional) argument PARENTS says whether
4435 to create parent directories if they don't exist. Interactively,
4436 this happens by default."
4438 (list (read-file-name "Make directory: " default-directory default-directory
4441 ;; If default-directory is a remote directory,
4442 ;; make sure we find its make-directory handler.
4443 (setq dir
(expand-file-name dir
))
4444 (let ((handler (find-file-name-handler dir
'make-directory
)))
4446 (funcall handler
'make-directory dir parents
)
4448 (make-directory-internal dir
)
4449 (let ((dir (directory-file-name (expand-file-name dir
)))
4451 (while (not (file-exists-p dir
))
4452 (setq create-list
(cons dir create-list
)
4453 dir
(directory-file-name (file-name-directory dir
))))
4455 (make-directory-internal (car create-list
))
4456 (setq create-list
(cdr create-list
))))))))
4458 (put 'revert-buffer-function
'permanent-local t
)
4459 (defvar revert-buffer-function nil
4460 "Function to use to revert this buffer, or nil to do the default.
4461 The function receives two arguments IGNORE-AUTO and NOCONFIRM,
4462 which are the arguments that `revert-buffer' received.")
4464 (put 'revert-buffer-insert-file-contents-function
'permanent-local t
)
4465 (defvar revert-buffer-insert-file-contents-function nil
4466 "Function to use to insert contents when reverting this buffer.
4467 Gets two args, first the nominal file name to use,
4468 and second, t if reading the auto-save file.
4470 The function you specify is responsible for updating (or preserving) point.")
4472 (defvar buffer-stale-function nil
4473 "Function to check whether a non-file buffer needs reverting.
4474 This should be a function with one optional argument NOCONFIRM.
4475 Auto Revert Mode passes t for NOCONFIRM. The function should return
4476 non-nil if the buffer should be reverted. A return value of
4477 `fast' means that the need for reverting was not checked, but
4478 that reverting the buffer is fast. The buffer is current when
4479 this function is called.
4481 The idea behind the NOCONFIRM argument is that it should be
4482 non-nil if the buffer is going to be reverted without asking the
4483 user. In such situations, one has to be careful with potentially
4484 time consuming operations.
4486 For more information on how this variable is used by Auto Revert mode,
4487 see Info node `(emacs)Supporting additional buffers'.")
4489 (defvar before-revert-hook nil
4490 "Normal hook for `revert-buffer' to run before reverting.
4491 If `revert-buffer-function' is used to override the normal revert
4492 mechanism, this hook is not used.")
4494 (defvar after-revert-hook nil
4495 "Normal hook for `revert-buffer' to run after reverting.
4496 Note that the hook value that it runs is the value that was in effect
4497 before reverting; that makes a difference if you have buffer-local
4500 If `revert-buffer-function' is used to override the normal revert
4501 mechanism, this hook is not used.")
4503 (defvar revert-buffer-internal-hook
)
4505 (defun revert-buffer (&optional ignore-auto noconfirm preserve-modes
)
4506 "Replace current buffer text with the text of the visited file on disk.
4507 This undoes all changes since the file was visited or saved.
4508 With a prefix argument, offer to revert from latest auto-save file, if
4509 that is more recent than the visited file.
4511 This command also implements an interface for special buffers
4512 that contain text which doesn't come from a file, but reflects
4513 some other data instead (e.g. Dired buffers, `buffer-list'
4514 buffers). This is done via the variable `revert-buffer-function'.
4515 In these cases, it should reconstruct the buffer contents from the
4518 When called from Lisp, the first argument is IGNORE-AUTO; only offer
4519 to revert from the auto-save file when this is nil. Note that the
4520 sense of this argument is the reverse of the prefix argument, for the
4521 sake of backward compatibility. IGNORE-AUTO is optional, defaulting
4524 Optional second argument NOCONFIRM means don't ask for confirmation
4525 at all. \(The variable `revert-without-query' offers another way to
4526 revert buffers without querying for confirmation.)
4528 Optional third argument PRESERVE-MODES non-nil means don't alter
4529 the files modes. Normally we reinitialize them using `normal-mode'.
4531 If the value of `revert-buffer-function' is non-nil, it is called to
4532 do all the work for this command. Otherwise, the hooks
4533 `before-revert-hook' and `after-revert-hook' are run at the beginning
4534 and the end, and if `revert-buffer-insert-file-contents-function' is
4535 non-nil, it is called instead of rereading visited file contents."
4537 ;; I admit it's odd to reverse the sense of the prefix argument, but
4538 ;; there is a lot of code out there which assumes that the first
4539 ;; argument should be t to avoid consulting the auto-save file, and
4540 ;; there's no straightforward way to encourage authors to notice a
4541 ;; reversal of the argument sense. So I'm just changing the user
4542 ;; interface, but leaving the programmatic interface the same.
4543 (interactive (list (not current-prefix-arg
)))
4544 (if revert-buffer-function
4545 (funcall revert-buffer-function ignore-auto noconfirm
)
4546 (with-current-buffer (or (buffer-base-buffer (current-buffer))
4548 (let* ((auto-save-p (and (not ignore-auto
)
4549 (recent-auto-save-p)
4550 buffer-auto-save-file-name
4551 (file-readable-p buffer-auto-save-file-name
)
4553 "Buffer has been auto-saved recently. Revert from auto-save file? ")))
4554 (file-name (if auto-save-p
4555 buffer-auto-save-file-name
4557 (cond ((null file-name
)
4558 (error "Buffer does not seem to be associated with any file"))
4560 (and (not (buffer-modified-p))
4562 (dolist (regexp revert-without-query
)
4563 (when (string-match regexp file-name
)
4564 (throw 'found t
)))))
4565 (yes-or-no-p (format "Revert buffer from file %s? "
4567 (run-hooks 'before-revert-hook
)
4568 ;; If file was backed up but has changed since,
4569 ;; we shd make another backup.
4570 (and (not auto-save-p
)
4571 (not (verify-visited-file-modtime (current-buffer)))
4572 (setq buffer-backed-up nil
))
4573 ;; Effectively copy the after-revert-hook status,
4574 ;; since after-find-file will clobber it.
4575 (let ((global-hook (default-value 'after-revert-hook
))
4576 (local-hook (when (local-variable-p 'after-revert-hook
)
4578 (inhibit-read-only t
))
4580 (revert-buffer-insert-file-contents-function
4581 (unless (eq buffer-undo-list t
)
4582 ;; Get rid of all undo records for this buffer.
4583 (setq buffer-undo-list nil
))
4584 ;; Don't make undo records for the reversion.
4585 (let ((buffer-undo-list t
))
4586 (funcall revert-buffer-insert-file-contents-function
4587 file-name auto-save-p
)))
4588 ((not (file-exists-p file-name
))
4589 (error (if buffer-file-number
4590 "File %s no longer exists!"
4591 "Cannot revert nonexistent file %s")
4593 ((not (file-readable-p file-name
))
4594 (error (if buffer-file-number
4595 "File %s no longer readable!"
4596 "Cannot revert unreadable file %s")
4599 ;; Bind buffer-file-name to nil
4600 ;; so that we don't try to lock the file.
4601 (let ((buffer-file-name nil
))
4605 (let ((coding-system-for-read
4606 ;; Auto-saved file should be read by Emacs'
4608 (if auto-save-p
'auto-save-coding
4609 (or coding-system-for-read
4610 buffer-file-coding-system-explicit
))))
4611 (if (and (not enable-multibyte-characters
)
4612 coding-system-for-read
4613 (not (memq (coding-system-base
4614 coding-system-for-read
)
4615 '(no-conversion raw-text
))))
4616 ;; As a coding system suitable for multibyte
4617 ;; buffer is specified, make the current
4618 ;; buffer multibyte.
4619 (set-buffer-multibyte t
))
4621 ;; This force after-insert-file-set-coding
4622 ;; (called from insert-file-contents) to set
4623 ;; buffer-file-coding-system to a proper value.
4624 (kill-local-variable 'buffer-file-coding-system
)
4626 ;; Note that this preserves point in an intelligent way.
4628 (let ((buffer-file-format buffer-file-format
))
4629 (insert-file-contents file-name
(not auto-save-p
)
4631 (insert-file-contents file-name
(not auto-save-p
)
4633 ;; Recompute the truename in case changes in symlinks
4634 ;; have changed the truename.
4635 (setq buffer-file-truename
4636 (abbreviate-file-name (file-truename buffer-file-name
)))
4637 (after-find-file nil nil t t preserve-modes
)
4638 ;; Run after-revert-hook as it was before we reverted.
4639 (setq-default revert-buffer-internal-hook global-hook
)
4641 (set (make-local-variable 'revert-buffer-internal-hook
)
4643 (kill-local-variable 'revert-buffer-internal-hook
))
4644 (run-hooks 'revert-buffer-internal-hook
))
4647 (defun recover-this-file ()
4648 "Recover the visited file--get contents from its last auto-save file."
4650 (recover-file buffer-file-name
))
4652 (defun recover-file (file)
4653 "Visit file FILE, but get contents from its last auto-save file."
4654 ;; Actually putting the file name in the minibuffer should be used
4656 ;; Not just because users often use the default.
4657 (interactive "FRecover file: ")
4658 (setq file
(expand-file-name file
))
4659 (if (auto-save-file-name-p (file-name-nondirectory file
))
4660 (error "%s is an auto-save file" (abbreviate-file-name file
)))
4661 (let ((file-name (let ((buffer-file-name file
))
4662 (make-auto-save-file-name))))
4663 (cond ((if (file-exists-p file
)
4664 (not (file-newer-than-file-p file-name file
))
4665 (not (file-exists-p file-name
)))
4666 (error "Auto-save file %s not current"
4667 (abbreviate-file-name file-name
)))
4668 ((save-window-excursion
4669 (with-output-to-temp-buffer "*Directory*"
4670 (buffer-disable-undo standard-output
)
4672 (let ((switches dired-listing-switches
))
4673 (if (file-symlink-p file
)
4674 (setq switches
(concat switches
"L")))
4675 (set-buffer standard-output
)
4676 ;; Use insert-directory-safely, not insert-directory,
4677 ;; because these files might not exist. In particular,
4678 ;; FILE might not exist if the auto-save file was for
4679 ;; a buffer that didn't visit a file, such as "*mail*".
4680 ;; The code in v20.x called `ls' directly, so we need
4681 ;; to emulate what `ls' did in that case.
4682 (insert-directory-safely file switches
)
4683 (insert-directory-safely file-name switches
))))
4684 (yes-or-no-p (format "Recover auto save file %s? " file-name
)))
4685 (switch-to-buffer (find-file-noselect file t
))
4686 (let ((inhibit-read-only t
)
4687 ;; Keep the current buffer-file-coding-system.
4688 (coding-system buffer-file-coding-system
)
4689 ;; Auto-saved file should be read with special coding.
4690 (coding-system-for-read 'auto-save-coding
))
4692 (insert-file-contents file-name nil
)
4693 (set-buffer-file-coding-system coding-system
))
4694 (after-find-file nil nil t
))
4695 (t (error "Recover-file cancelled")))))
4697 (defun recover-session ()
4698 "Recover auto save files from a previous Emacs session.
4699 This command first displays a Dired buffer showing you the
4700 previous sessions that you could recover from.
4701 To choose one, move point to the proper line and then type C-c C-c.
4702 Then you'll be asked about a number of files to recover."
4704 (if (null auto-save-list-file-prefix
)
4705 (error "You set `auto-save-list-file-prefix' to disable making session files"))
4706 (let ((dir (file-name-directory auto-save-list-file-prefix
)))
4707 (unless (file-directory-p dir
)
4708 (make-directory dir t
))
4709 (unless (directory-files dir nil
4710 (concat "\\`" (regexp-quote
4711 (file-name-nondirectory
4712 auto-save-list-file-prefix
)))
4714 (error "No previous sessions to recover")))
4715 (let ((ls-lisp-support-shell-wildcards t
))
4716 (dired (concat auto-save-list-file-prefix
"*")
4717 (concat dired-listing-switches
"t")))
4719 (goto-char (point-min))
4720 (or (looking-at " Move to the session you want to recover,")
4721 (let ((inhibit-read-only t
))
4722 ;; Each line starts with a space
4723 ;; so that Font Lock mode won't highlight the first character.
4724 (insert " Move to the session you want to recover,\n"
4725 " then type C-c C-c to select it.\n\n"
4726 " You can also delete some of these files;\n"
4727 " type d on a line to mark that file for deletion.\n\n"))))
4728 (use-local-map (nconc (make-sparse-keymap) (current-local-map)))
4729 (define-key (current-local-map) "\C-c\C-c" 'recover-session-finish
))
4731 (defun recover-session-finish ()
4732 "Choose one saved session to recover auto-save files from.
4733 This command is used in the special Dired buffer created by
4734 \\[recover-session]."
4736 ;; Get the name of the session file to recover from.
4737 (let ((file (dired-get-filename))
4739 (buffer (get-buffer-create " *recover*")))
4741 (dired-do-flagged-delete t
)
4744 ;; Read in the auto-save-list file.
4747 (insert-file-contents file
)
4748 ;; Loop thru the text of that file
4749 ;; and get out the names of the files to recover.
4751 (let (thisfile autofile
)
4753 ;; This is a pair of lines for a non-file-visiting buffer.
4754 ;; Get the auto-save file name and manufacture
4755 ;; a "visited file name" from that.
4758 ;; If there is no auto-save file name, the
4759 ;; auto-save-list file is probably corrupted.
4762 (buffer-substring-no-properties
4764 (line-end-position)))
4768 (file-name-nondirectory autofile
)
4770 (file-name-directory autofile
))))
4772 ;; This pair of lines is a file-visiting
4773 ;; buffer. Use the visited file name.
4776 (buffer-substring-no-properties
4777 (point) (progn (end-of-line) (point))))
4780 (buffer-substring-no-properties
4781 (point) (progn (end-of-line) (point))))
4783 ;; Ignore a file if its auto-save file does not exist now.
4784 (if (and autofile
(file-exists-p autofile
))
4785 (setq files
(cons thisfile files
)))))
4786 (setq files
(nreverse files
))
4787 ;; The file contains a pair of line for each auto-saved buffer.
4788 ;; The first line of the pair contains the visited file name
4789 ;; or is empty if the buffer was not visiting a file.
4790 ;; The second line is the auto-save file name.
4792 (map-y-or-n-p "Recover %s? "
4795 (save-excursion (recover-file file
))
4797 "Failed to recover `%s'" file
)))
4799 '("file" "files" "recover"))
4800 (message "No files can be recovered from this session now")))
4801 (kill-buffer buffer
))))
4803 (defun kill-buffer-ask (buffer)
4804 "Kill BUFFER if confirmed."
4806 (format "Buffer %s %s. Kill? " (buffer-name buffer
)
4807 (if (buffer-modified-p buffer
)
4808 "HAS BEEN EDITED" "is unmodified")))
4809 (kill-buffer buffer
)))
4811 (defun kill-some-buffers (&optional list
)
4812 "Kill some buffers. Asks the user whether to kill each one of them.
4813 Non-interactively, if optional argument LIST is non-nil, it
4814 specifies the list of buffers to kill, asking for approval for each one."
4817 (setq list
(buffer-list)))
4819 (let* ((buffer (car list
))
4820 (name (buffer-name buffer
)))
4821 (and name
; Can be nil for an indirect buffer
4822 ; if we killed the base buffer.
4823 (not (string-equal name
""))
4824 (/= (aref name
0) ?\s
)
4825 (kill-buffer-ask buffer
)))
4826 (setq list
(cdr list
))))
4828 (defun kill-matching-buffers (regexp &optional internal-too
)
4829 "Kill buffers whose name matches the specified REGEXP.
4830 The optional second argument indicates whether to kill internal buffers too."
4831 (interactive "sKill buffers matching this regular expression: \nP")
4832 (dolist (buffer (buffer-list))
4833 (let ((name (buffer-name buffer
)))
4834 (when (and name
(not (string-equal name
""))
4835 (or internal-too
(/= (aref name
0) ?\s
))
4836 (string-match regexp name
))
4837 (kill-buffer-ask buffer
)))))
4840 (defun auto-save-mode (arg)
4841 "Toggle auto-saving of contents of current buffer.
4842 With prefix argument ARG, turn auto-saving on if positive, else off."
4844 (setq buffer-auto-save-file-name
4846 (or (not buffer-auto-save-file-name
)
4847 ;; If auto-save is off because buffer has shrunk,
4848 ;; then toggling should turn it on.
4849 (< buffer-saved-size
0))
4850 (or (eq arg t
) (listp arg
) (and (integerp arg
) (> arg
0))))
4851 (if (and buffer-file-name auto-save-visited-file-name
4852 (not buffer-read-only
))
4854 (make-auto-save-file-name))))
4855 ;; If -1 was stored here, to temporarily turn off saving,
4857 (and (< buffer-saved-size
0)
4858 (setq buffer-saved-size
0))
4860 (message "Auto-save %s (in this buffer)"
4861 (if buffer-auto-save-file-name
"on" "off")))
4862 buffer-auto-save-file-name
)
4864 (defun rename-auto-save-file ()
4865 "Adjust current buffer's auto save file name for current conditions.
4866 Also rename any existing auto save file, if it was made in this session."
4867 (let ((osave buffer-auto-save-file-name
))
4868 (setq buffer-auto-save-file-name
4869 (make-auto-save-file-name))
4870 (if (and osave buffer-auto-save-file-name
4871 (not (string= buffer-auto-save-file-name buffer-file-name
))
4872 (not (string= buffer-auto-save-file-name osave
))
4873 (file-exists-p osave
)
4874 (recent-auto-save-p))
4875 (rename-file osave buffer-auto-save-file-name t
))))
4877 (defun make-auto-save-file-name ()
4878 "Return file name to use for auto-saves of current buffer.
4879 Does not consider `auto-save-visited-file-name' as that variable is checked
4880 before calling this function. You can redefine this for customization.
4881 See also `auto-save-file-name-p'."
4882 (if buffer-file-name
4883 (let ((handler (find-file-name-handler buffer-file-name
4884 'make-auto-save-file-name
)))
4886 (funcall handler
'make-auto-save-file-name
)
4887 (let ((list auto-save-file-name-transforms
)
4888 (filename buffer-file-name
)
4890 ;; Apply user-specified translations
4891 ;; to the file name.
4892 (while (and list
(not result
))
4893 (if (string-match (car (car list
)) filename
)
4894 (setq result
(replace-match (cadr (car list
)) t nil
4896 uniq
(car (cddr (car list
)))))
4897 (setq list
(cdr list
)))
4900 (setq filename
(concat
4901 (file-name-directory result
)
4902 (subst-char-in-string
4904 (replace-regexp-in-string "!" "!!"
4906 (setq filename result
)))
4908 (if (and (eq system-type
'ms-dos
)
4909 (not (msdos-long-file-names)))
4910 ;; We truncate the file name to DOS 8+3 limits
4911 ;; before doing anything else, because the regexp
4912 ;; passed to string-match below cannot handle
4913 ;; extensions longer than 3 characters, multiple
4914 ;; dots, and other atrocities.
4915 (let ((fn (dos-8+3-filename
4916 (file-name-nondirectory buffer-file-name
))))
4918 "\\`\\([^.]+\\)\\(\\.\\(..?\\)?.?\\|\\)\\'"
4920 (concat (file-name-directory buffer-file-name
)
4921 "#" (match-string 1 fn
)
4922 "." (match-string 3 fn
) "#"))
4923 (concat (file-name-directory filename
)
4925 (file-name-nondirectory filename
)
4927 ;; Make sure auto-save file names don't contain characters
4928 ;; invalid for the underlying filesystem.
4929 (if (and (memq system-type
'(ms-dos windows-nt cygwin
))
4930 ;; Don't modify remote (ange-ftp) filenames
4931 (not (string-match "^/\\w+@[-A-Za-z0-9._]+:" result
)))
4932 (convert-standard-filename result
)
4935 ;; Deal with buffers that don't have any associated files. (Mail
4936 ;; mode tends to create a good number of these.)
4938 (let ((buffer-name (buffer-name))
4941 ;; Restrict the characters used in the file name to those which
4942 ;; are known to be safe on all filesystems, url-encoding the
4944 ;; We do this on all platforms, because even if we are not
4945 ;; running on DOS/Windows, the current directory may be on a
4946 ;; mounted VFAT filesystem, such as a USB memory stick.
4947 (while (string-match "[^A-Za-z0-9-_.~#+]" buffer-name limit
)
4948 (let* ((character (aref buffer-name
(match-beginning 0)))
4950 ;; For multibyte characters, this will produce more than
4951 ;; 2 hex digits, so is not true URL encoding.
4952 (format "%%%02X" character
)))
4953 (setq buffer-name
(replace-match replacement t t buffer-name
))
4954 (setq limit
(1+ (match-end 0)))))
4955 ;; Generate the file name.
4960 (format "#%s#" buffer-name
)
4961 ;; Try a few alternative directories, to get one we can
4964 ((file-writable-p default-directory
) default-directory
)
4965 ((file-writable-p "/var/tmp/") "/var/tmp/")
4967 (if (and (memq system-type
'(ms-dos windows-nt cygwin
))
4968 ;; Don't modify remote (ange-ftp) filenames
4969 (not (string-match "^/\\w+@[-A-Za-z0-9._]+:" fname
)))
4970 ;; The call to convert-standard-filename is in case
4971 ;; buffer-name includes characters not allowed by the
4972 ;; DOS/Windows filesystems. make-temp-file writes to the
4973 ;; file it creates, so we must fix the file name _before_
4974 ;; make-temp-file is called.
4975 (convert-standard-filename fname
)
4978 ;; make-temp-file creates the file,
4979 ;; but we don't want it to exist until we do an auto-save.
4981 (delete-file file-name
)
4985 (defun auto-save-file-name-p (filename)
4986 "Return non-nil if FILENAME can be yielded by `make-auto-save-file-name'.
4987 FILENAME should lack slashes. You can redefine this for customization."
4988 (string-match "^#.*#$" filename
))
4990 (defun wildcard-to-regexp (wildcard)
4991 "Given a shell file name pattern WILDCARD, return an equivalent regexp.
4992 The generated regexp will match a filename only if the filename
4993 matches that wildcard according to shell rules. Only wildcards known
4994 by `sh' are supported."
4995 (let* ((i (string-match "[[.*+\\^$?]" wildcard
))
4996 ;; Copy the initial run of non-special characters.
4997 (result (substring wildcard
0 i
))
4998 (len (length wildcard
)))
4999 ;; If no special characters, we're almost done.
5002 (let ((ch (aref wildcard i
))
5010 (eq (aref wildcard
(1+ i
)) ?\
]))
5012 ((eq ch ?\
[) ; [...] maps to regexp char class
5017 ((eq (aref wildcard i
) ?
!) ; [!...] -> [^...]
5020 (if (eq (aref wildcard i
) ?\
])
5025 ((eq (aref wildcard i
) ?^
)
5026 ;; Found "[^". Insert a `\0' character
5027 ;; (which cannot happen in a filename)
5028 ;; into the character class, so that `^'
5029 ;; is not the first character after `[',
5030 ;; and thus non-special in a regexp.
5034 ((eq (aref wildcard i
) ?\
])
5035 ;; I don't think `]' can appear in a
5036 ;; character class in a wildcard, but
5037 ;; let's be general here.
5042 (prog1 ; copy everything upto next `]'.
5045 (setq j
(string-match
5047 (setq i
(if j
(1- j
) (1- len
)))))))
5049 ((eq ch ?
*) "[^\000]*")
5053 ((eq ch ?
\\) "\\\\") ; probably cannot happen...
5054 ((eq ch ??
) "[^\000]")
5055 (t (char-to-string ch
)))))
5057 ;; Shell wildcards should match the entire filename,
5058 ;; not its part. Make the regexp say so.
5059 (concat "\\`" result
"\\'")))
5061 (defcustom list-directory-brief-switches
5063 "Switches for `list-directory' to pass to `ls' for brief listing."
5067 (defcustom list-directory-verbose-switches
5069 "Switches for `list-directory' to pass to `ls' for verbose listing."
5073 (defun file-expand-wildcards (pattern &optional full
)
5074 "Expand wildcard pattern PATTERN.
5075 This returns a list of file names which match the pattern.
5077 If PATTERN is written as an absolute file name,
5078 the values are absolute also.
5080 If PATTERN is written as a relative file name, it is interpreted
5081 relative to the current default directory, `default-directory'.
5082 The file names returned are normally also relative to the current
5083 default directory. However, if FULL is non-nil, they are absolute."
5085 (let* ((nondir (file-name-nondirectory pattern
))
5086 (dirpart (file-name-directory pattern
))
5087 ;; A list of all dirs that DIRPART specifies.
5088 ;; This can be more than one dir
5089 ;; if DIRPART contains wildcards.
5090 (dirs (if (and dirpart
(string-match "[[*?]" dirpart
))
5091 (mapcar 'file-name-as-directory
5092 (file-expand-wildcards (directory-file-name dirpart
)))
5096 (when (or (null (car dirs
)) ; Possible if DIRPART is not wild.
5097 (file-directory-p (directory-file-name (car dirs
))))
5098 (let ((this-dir-contents
5099 ;; Filter out "." and ".."
5101 (mapcar #'(lambda (name)
5102 (unless (string-match "\\`\\.\\.?\\'"
5103 (file-name-nondirectory name
))
5105 (directory-files (or (car dirs
) ".") full
5106 (wildcard-to-regexp nondir
))))))
5109 (if (and (car dirs
) (not full
))
5110 (mapcar (function (lambda (name) (concat (car dirs
) name
)))
5114 (setq dirs
(cdr dirs
)))
5117 (defun list-directory (dirname &optional verbose
)
5118 "Display a list of files in or matching DIRNAME, a la `ls'.
5119 DIRNAME is globbed by the shell if necessary.
5120 Prefix arg (second arg if noninteractive) means supply -l switch to `ls'.
5121 Actions controlled by variables `list-directory-brief-switches'
5122 and `list-directory-verbose-switches'."
5123 (interactive (let ((pfx current-prefix-arg
))
5124 (list (read-file-name (if pfx
"List directory (verbose): "
5125 "List directory (brief): ")
5126 nil default-directory nil
)
5128 (let ((switches (if verbose list-directory-verbose-switches
5129 list-directory-brief-switches
))
5131 (or dirname
(setq dirname default-directory
))
5132 (setq dirname
(expand-file-name dirname
))
5133 (with-output-to-temp-buffer "*Directory*"
5134 (setq buffer standard-output
)
5135 (buffer-disable-undo standard-output
)
5136 (princ "Directory ")
5140 (set-buffer "*Directory*")
5141 (let ((wildcard (not (file-directory-p dirname
))))
5142 (insert-directory dirname switches wildcard
(not wildcard
)))))
5143 ;; Finishing with-output-to-temp-buffer seems to clobber default-directory.
5144 (with-current-buffer buffer
5145 (setq default-directory
5146 (if (file-directory-p dirname
)
5147 (file-name-as-directory dirname
)
5148 (file-name-directory dirname
))))))
5150 (defun shell-quote-wildcard-pattern (pattern)
5151 "Quote characters special to the shell in PATTERN, leave wildcards alone.
5153 PATTERN is assumed to represent a file-name wildcard suitable for the
5154 underlying filesystem. For Unix and GNU/Linux, the characters from the
5155 set [ \\t\\n;<>&|()'\"#$] are quoted with a backslash; for DOS/Windows, all
5156 the parts of the pattern which don't include wildcard characters are
5157 quoted with double quotes.
5158 Existing quote characters in PATTERN are left alone, so you can pass
5159 PATTERN that already quotes some of the special characters."
5162 ((memq system-type
'(ms-dos windows-nt cygwin
))
5163 ;; DOS/Windows don't allow `"' in file names. So if the
5164 ;; argument has quotes, we can safely assume it is already
5165 ;; quoted by the caller.
5166 (if (or (string-match "[\"]" pattern
)
5167 ;; We quote [&()#$'] in case their shell is a port of a
5168 ;; Unixy shell. We quote [,=+] because stock DOS and
5169 ;; Windows shells require that in some cases, such as
5170 ;; passing arguments to batch files that use positional
5171 ;; arguments like %1.
5172 (not (string-match "[ \t;&()#$',=+]" pattern
)))
5177 (while (string-match "[*?]+" pattern beg
)
5178 (setq end
(match-beginning 0)
5179 result
(concat result
(substring pattern beg end
)
5181 (substring pattern end
(match-end 0))
5184 (concat result
(substring pattern beg
) "\""))))
5187 (while (string-match "[ \t\n;<>&|()'\"#$]" pattern beg
)
5189 (concat (substring pattern
0 (match-beginning 0))
5191 (substring pattern
(match-beginning 0)))
5192 beg
(1+ (match-end 0)))))
5196 (defvar insert-directory-program
"ls"
5197 "Absolute or relative name of the `ls' program used by `insert-directory'.")
5199 (defcustom directory-free-space-program
"df"
5200 "Program to get the amount of free space on a file system.
5201 We assume the output has the format of `df'.
5202 The value of this variable must be just a command name or file name;
5203 if you want to specify options, use `directory-free-space-args'.
5205 A value of nil disables this feature.
5207 If the function `file-system-info' is defined, it is always used in
5208 preference to the program given by this variable."
5209 :type
'(choice (string :tag
"Program") (const :tag
"None" nil
))
5212 (defcustom directory-free-space-args
5213 (if (eq system-type
'darwin
) "-k" "-Pk")
5214 "Options to use when running `directory-free-space-program'."
5218 (defun get-free-disk-space (dir)
5219 "Return the amount of free space on directory DIR's file system.
5220 The result is a string that gives the number of free 1KB blocks,
5221 or nil if the system call or the program which retrieve the information
5222 fail. It returns also nil when DIR is a remote directory.
5224 This function calls `file-system-info' if it is available, or invokes the
5225 program specified by `directory-free-space-program' if that is non-nil."
5226 (when (not (file-remote-p dir
))
5227 ;; Try to find the number of free blocks. Non-Posix systems don't
5228 ;; always have df, but might have an equivalent system call.
5229 (if (fboundp 'file-system-info
)
5230 (let ((fsinfo (file-system-info dir
)))
5232 (format "%.0f" (/ (nth 2 fsinfo
) 1024))))
5235 (when (and directory-free-space-program
5236 (eq 0 (call-process directory-free-space-program
5238 directory-free-space-args
5240 ;; Usual format is a header line followed by a line of
5242 (goto-char (point-min))
5246 ;; Move to the end of the "available blocks" number.
5247 (skip-chars-forward "^ \t")
5249 ;; Copy it into AVAILABLE.
5250 (let ((end (point)))
5252 (buffer-substring (point) end
))))))))))
5254 ;; The following expression replaces `dired-move-to-filename-regexp'.
5255 (defvar directory-listing-before-filename-regexp
5256 (let* ((l "\\([A-Za-z]\\|[^\0-\177]\\)")
5257 (l-or-quote "\\([A-Za-z']\\|[^\0-\177]\\)")
5258 ;; In some locales, month abbreviations are as short as 2 letters,
5259 ;; and they can be followed by ".".
5260 ;; In Breton, a month name can include a quote character.
5261 (month (concat l-or-quote l-or-quote
"+\\.?"))
5263 (yyyy "[0-9][0-9][0-9][0-9]")
5265 (HH:MM
"[ 0-2][0-9][:.][0-5][0-9]")
5266 (seconds "[0-6][0-9]\\([.,][0-9]+\\)?")
5267 (zone "[-+][0-2][0-9][0-5][0-9]")
5268 (iso-mm-dd "[01][0-9]-[0-3][0-9]")
5269 (iso-time (concat HH
:MM
"\\(:" seconds
"\\( ?" zone
"\\)?\\)?"))
5270 (iso (concat "\\(\\(" yyyy
"-\\)?" iso-mm-dd
"[ T]" iso-time
5271 "\\|" yyyy
"-" iso-mm-dd
"\\)"))
5272 (western (concat "\\(" month s
"+" dd
"\\|" dd
"\\.?" s month
"\\)"
5274 "\\(" HH
:MM
"\\|" yyyy
"\\)"))
5275 (western-comma (concat month s
"+" dd
"," s
"+" yyyy
))
5276 ;; Japanese MS-Windows ls-lisp has one-digit months, and
5277 ;; omits the Kanji characters after month and day-of-month.
5278 ;; On Mac OS X 10.3, the date format in East Asian locales is
5279 ;; day-of-month digits followed by month digits.
5282 (concat "\\(" mm l
"?" s dd l
"?" s
"+"
5283 "\\|" dd s mm s
"+" "\\)"
5284 "\\(" HH
:MM
"\\|" yyyy l
"?" "\\)")))
5285 ;; The "[0-9]" below requires the previous column to end in a digit.
5286 ;; This avoids recognizing `1 may 1997' as a date in the line:
5287 ;; -r--r--r-- 1 may 1997 1168 Oct 19 16:49 README
5289 ;; The "[BkKMGTPEZY]?" below supports "ls -alh" output.
5290 ;; The ".*" below finds the last match if there are multiple matches.
5291 ;; This avoids recognizing `jservice 10 1024' as a date in the line:
5292 ;; drwxr-xr-x 3 jservice 10 1024 Jul 2 1997 esg-host
5294 ;; vc dired listings provide the state or blanks between file
5295 ;; permissions and date. The state is always surrounded by
5297 ;; -rw-r--r-- (modified) 2005-10-22 21:25 files.el
5298 ;; This is not supported yet.
5299 (concat ".*[0-9][BkKMGTPEZY]?" s
5300 "\\(" western
"\\|" western-comma
"\\|" east-asian
"\\|" iso
"\\)"
5302 "Regular expression to match up to the file name in a directory listing.
5303 The default value is designed to recognize dates and times
5304 regardless of the language.")
5306 (defvar insert-directory-ls-version
'unknown
)
5309 ;; - must insert _exactly_one_line_ describing FILE if WILDCARD and
5310 ;; FULL-DIRECTORY-P is nil.
5311 ;; The single line of output must display FILE's name as it was
5312 ;; given, namely, an absolute path name.
5313 ;; - must insert exactly one line for each file if WILDCARD or
5314 ;; FULL-DIRECTORY-P is t, plus one optional "total" line
5315 ;; before the file lines, plus optional text after the file lines.
5316 ;; Lines are delimited by "\n", so filenames containing "\n" are not
5318 ;; File lines should display the basename.
5319 ;; - must be consistent with
5320 ;; - functions dired-move-to-filename, (these two define what a file line is)
5321 ;; dired-move-to-end-of-filename,
5322 ;; dired-between-files, (shortcut for (not (dired-move-to-filename)))
5323 ;; dired-insert-headerline
5324 ;; dired-after-subdir-garbage (defines what a "total" line is)
5325 ;; - variable dired-subdir-regexp
5326 ;; - may be passed "--dired" as the first argument in SWITCHES.
5327 ;; Filename handlers might have to remove this switch if their
5328 ;; "ls" command does not support it.
5329 (defun insert-directory (file switches
&optional wildcard full-directory-p
)
5330 "Insert directory listing for FILE, formatted according to SWITCHES.
5331 Leaves point after the inserted text.
5332 SWITCHES may be a string of options, or a list of strings
5333 representing individual options.
5334 Optional third arg WILDCARD means treat FILE as shell wildcard.
5335 Optional fourth arg FULL-DIRECTORY-P means file is a directory and
5336 switches do not contain `d', so that a full listing is expected.
5338 This works by running a directory listing program
5339 whose name is in the variable `insert-directory-program'.
5340 If WILDCARD, it also runs the shell specified by `shell-file-name'.
5342 When SWITCHES contains the long `--dired' option, this function
5343 treats it specially, for the sake of dired. However, the
5344 normally equivalent short `-D' option is just passed on to
5345 `insert-directory-program', as any other option."
5346 ;; We need the directory in order to find the right handler.
5347 (let ((handler (find-file-name-handler (expand-file-name file
)
5348 'insert-directory
)))
5350 (funcall handler
'insert-directory file switches
5351 wildcard full-directory-p
)
5352 (let (result (beg (point)))
5354 ;; Read the actual directory using `insert-directory-program'.
5355 ;; RESULT gets the status code.
5356 (let* (;; We at first read by no-conversion, then after
5357 ;; putting text property `dired-filename, decode one
5358 ;; bunch by one to preserve that property.
5359 (coding-system-for-read 'no-conversion
)
5360 ;; This is to control encoding the arguments in call-process.
5361 (coding-system-for-write
5362 (and enable-multibyte-characters
5363 (or file-name-coding-system
5364 default-file-name-coding-system
))))
5367 ;; Run ls in the directory part of the file pattern
5368 ;; using the last component as argument.
5369 (let ((default-directory
5370 (if (file-name-absolute-p file
)
5371 (file-name-directory file
)
5372 (file-name-directory (expand-file-name file
))))
5373 (pattern (file-name-nondirectory file
)))
5375 shell-file-name nil t nil
5377 (concat (if (memq system-type
'(ms-dos windows-nt
))
5379 "\\") ; Disregard Unix shell aliases!
5380 insert-directory-program
5382 (if (stringp switches
)
5384 (mapconcat 'identity switches
" "))
5386 ;; Quote some characters that have
5387 ;; special meanings in shells; but
5388 ;; don't quote the wildcards--we want
5389 ;; them to be special. We also
5390 ;; currently don't quote the quoting
5391 ;; characters in case people want to
5392 ;; use them explicitly to quote
5393 ;; wildcard characters.
5394 (shell-quote-wildcard-pattern pattern
))))
5395 ;; SunOS 4.1.3, SVr4 and others need the "." to list the
5396 ;; directory if FILE is a symbolic link.
5397 (apply 'call-process
5398 insert-directory-program nil t nil
5400 (if (listp switches
) switches
5401 (unless (equal switches
"")
5402 ;; Split the switches at any spaces so we can
5403 ;; pass separate options as separate args.
5404 (split-string switches
)))
5405 ;; Avoid lossage if FILE starts with `-'.
5408 (if (string-match "\\`~" file
)
5409 (setq file
(expand-file-name file
)))
5411 (if full-directory-p
5412 (concat (file-name-as-directory file
) ".")
5415 ;; If we got "//DIRED//" in the output, it means we got a real
5416 ;; directory listing, even if `ls' returned nonzero.
5417 ;; So ignore any errors.
5418 (when (if (stringp switches
)
5419 (string-match "--dired\\>" switches
)
5420 (member "--dired" switches
))
5423 (when (looking-at "//SUBDIRED//")
5425 (if (looking-at "//DIRED//")
5428 (when (and (not (eq 0 result
))
5429 (eq insert-directory-ls-version
'unknown
))
5430 ;; The first time ls returns an error,
5431 ;; find the version numbers of ls,
5432 ;; and set insert-directory-ls-version
5433 ;; to > if it is more than 5.2.1, < if it is less, nil if it
5434 ;; is equal or if the info cannot be obtained.
5435 ;; (That can mean it isn't GNU ls.)
5438 (call-process "ls" nil t nil
"--version")
5440 (if (string-match "ls (.*utils) \\([0-9.]*\\)$" version-out
)
5441 (let* ((version (match-string 1 version-out
))
5442 (split (split-string version
"[.]"))
5443 (numbers (mapcar 'string-to-number split
))
5446 (while (and (not comparison
) (or numbers min
))
5448 (setq comparison
'>))
5450 (setq comparison
'<))
5451 ((> (car numbers
) (car min
))
5452 (setq comparison
'>))
5453 ((< (car numbers
) (car min
))
5454 (setq comparison
'<))
5456 (setq numbers
(cdr numbers
)
5458 (setq insert-directory-ls-version
(or comparison
'=)))
5459 (setq insert-directory-ls-version nil
))))
5461 ;; For GNU ls versions 5.2.2 and up, ignore minor errors.
5462 (when (and (eq 1 result
) (eq insert-directory-ls-version
'>))
5465 ;; If `insert-directory-program' failed, signal an error.
5466 (unless (eq 0 result
)
5467 ;; Delete the error message it may have output.
5468 (delete-region beg
(point))
5469 ;; On non-Posix systems, we cannot open a directory, so
5470 ;; don't even try, because that will always result in
5471 ;; the ubiquitous "Access denied". Instead, show the
5472 ;; command line so the user can try to guess what went wrong.
5473 (if (and (file-directory-p file
)
5474 (memq system-type
'(ms-dos windows-nt
)))
5476 "Reading directory: \"%s %s -- %s\" exited with status %s"
5477 insert-directory-program
5478 (if (listp switches
) (concat switches
) switches
)
5480 ;; Unix. Access the file to get a suitable error.
5481 (access-file file
"Reading directory")
5482 (error "Listing directory failed but `access-file' worked")))
5484 (when (if (stringp switches
)
5485 (string-match "--dired\\>" switches
)
5486 (member "--dired" switches
))
5487 ;; The following overshoots by one line for an empty
5488 ;; directory listed with "--dired", but without "-a"
5489 ;; switch, where the ls output contains a
5490 ;; "//DIRED-OPTIONS//" line, but no "//DIRED//" line.
5491 ;; We take care of that case later.
5493 (when (looking-at "//SUBDIRED//")
5494 (delete-region (point) (progn (forward-line 1) (point)))
5496 (if (looking-at "//DIRED//")
5497 (let ((end (line-end-position))
5500 ;; Find all the lines that are error messages,
5501 ;; and record the bounds of each one.
5503 (while (< (point) linebeg
)
5504 (or (eql (following-char) ?\s
)
5505 (push (list (point) (line-end-position)) error-lines
))
5507 (setq error-lines
(nreverse error-lines
))
5508 ;; Now read the numeric positions of file names.
5512 (while (< (point) end
)
5513 (let ((start (insert-directory-adj-pos
5514 (+ beg
(read (current-buffer)))
5516 (end (insert-directory-adj-pos
5517 (+ beg
(read (current-buffer)))
5519 (if (memq (char-after end
) '(?
\n ?\s
))
5520 ;; End is followed by \n or by " -> ".
5521 (put-text-property start end
'dired-filename t
)
5522 ;; It seems that we can't trust ls's output as to
5523 ;; byte positions of filenames.
5524 (put-text-property beg
(point) 'dired-filename nil
)
5528 (delete-region (point) (progn (forward-line 1) (point))))
5529 ;; Take care of the case where the ls output contains a
5530 ;; "//DIRED-OPTIONS//"-line, but no "//DIRED//"-line
5531 ;; and we went one line too far back (see above).
5533 (if (looking-at "//DIRED-OPTIONS//")
5534 (delete-region (point) (progn (forward-line 1) (point)))))
5536 ;; Now decode what read if necessary.
5537 (let ((coding (or coding-system-for-read
5538 file-name-coding-system
5539 default-file-name-coding-system
5543 (when (and enable-multibyte-characters
5544 (not (memq (coding-system-base coding
)
5545 '(raw-text no-conversion
))))
5546 ;; If no coding system is specified or detection is
5547 ;; requested, detect the coding.
5548 (if (eq (coding-system-base coding
) 'undecided
)
5549 (setq coding
(detect-coding-region beg
(point) t
)))
5550 (if (not (eq (coding-system-base coding
) 'undecided
))
5553 (coding-system-change-eol-conversion coding
'unix
))
5554 (narrow-to-region beg
(point))
5555 (goto-char (point-min))
5558 val
(get-text-property (point) 'dired-filename
))
5559 (goto-char (next-single-property-change
5560 (point) 'dired-filename nil
(point-max)))
5561 ;; Force no eol conversion on a file name, so
5562 ;; that CR is preserved.
5563 (decode-coding-region pos
(point)
5564 (if val coding-no-eol coding
))
5566 (put-text-property pos
(point)
5567 'dired-filename t
)))))))
5569 (if full-directory-p
5570 ;; Try to insert the amount of free space.
5573 ;; First find the line to put it on.
5574 (when (re-search-forward "^ *\\(total\\)" nil t
)
5575 (let ((available (get-free-disk-space ".")))
5577 ;; Replace "total" with "used", to avoid confusion.
5578 (replace-match "total used in directory" nil nil nil
1)
5580 (insert " available " available
))))))))))
5582 (defun insert-directory-adj-pos (pos error-lines
)
5583 "Convert `ls --dired' file name position value POS to a buffer position.
5584 File name position values returned in ls --dired output
5585 count only stdout; they don't count the error messages sent to stderr.
5586 So this function converts to them to real buffer positions.
5587 ERROR-LINES is a list of buffer positions of error message lines,
5588 of the form (START END)."
5589 (while (and error-lines
(< (caar error-lines
) pos
))
5590 (setq pos
(+ pos
(- (nth 1 (car error-lines
)) (nth 0 (car error-lines
)))))
5594 (defun insert-directory-safely (file switches
5595 &optional wildcard full-directory-p
)
5596 "Insert directory listing for FILE, formatted according to SWITCHES.
5598 Like `insert-directory', but if FILE does not exist, it inserts a
5599 message to that effect instead of signaling an error."
5600 (if (file-exists-p file
)
5601 (insert-directory file switches wildcard full-directory-p
)
5602 ;; Simulate the message printed by `ls'.
5603 (insert (format "%s: No such file or directory\n" file
))))
5605 (defvar kill-emacs-query-functions nil
5606 "Functions to call with no arguments to query about killing Emacs.
5607 If any of these functions returns nil, killing Emacs is cancelled.
5608 `save-buffers-kill-emacs' calls these functions, but `kill-emacs',
5609 the low level primitive, does not. See also `kill-emacs-hook'.")
5611 (defcustom confirm-kill-emacs nil
5612 "How to ask for confirmation when leaving Emacs.
5613 If nil, the default, don't ask at all. If the value is non-nil, it should
5614 be a predicate function such as `yes-or-no-p'."
5615 :type
'(choice (const :tag
"Ask with yes-or-no-p" yes-or-no-p
)
5616 (const :tag
"Ask with y-or-n-p" y-or-n-p
)
5617 (const :tag
"Don't confirm" nil
))
5621 (defun save-buffers-kill-emacs (&optional arg
)
5622 "Offer to save each buffer, then kill this Emacs process.
5623 With prefix ARG, silently save all file-visiting buffers, then kill."
5625 (save-some-buffers arg t
)
5626 (and (or (not (memq t
(mapcar (function
5627 (lambda (buf) (and (buffer-file-name buf
)
5628 (buffer-modified-p buf
))))
5630 (yes-or-no-p "Modified buffers exist; exit anyway? "))
5631 (or (not (fboundp 'process-list
))
5632 ;; process-list is not defined on MSDOS.
5633 (let ((processes (process-list))
5636 (and (memq (process-status (car processes
)) '(run stop open listen
))
5637 (process-query-on-exit-flag (car processes
))
5639 (setq processes
(cdr processes
)))
5642 (yes-or-no-p "Active processes exist; kill them and exit anyway? "))))
5643 ;; Query the user for other things, perhaps.
5644 (run-hook-with-args-until-failure 'kill-emacs-query-functions
)
5645 (or (null confirm-kill-emacs
)
5646 (funcall confirm-kill-emacs
"Really exit Emacs? "))
5649 (defun save-buffers-kill-terminal (&optional arg
)
5650 "Offer to save each buffer, then kill the current connection.
5651 If the current frame has no client, kill Emacs itself.
5653 With prefix ARG, silently save all file-visiting buffers, then kill.
5655 If emacsclient was started with a list of filenames to edit, then
5656 only these files will be asked to be saved."
5658 (let ((proc (frame-parameter (selected-frame) 'client
))
5659 (frame (selected-frame)))
5661 (save-buffers-kill-emacs)
5662 (server-save-buffers-kill-terminal proc arg
))))
5665 ;; We use /: as a prefix to "quote" a file name
5666 ;; so that magic file name handlers will not apply to it.
5668 (setq file-name-handler-alist
5669 (cons '("\\`/:" . file-name-non-special
)
5670 file-name-handler-alist
))
5672 ;; We depend on being the last handler on the list,
5673 ;; so that anything else which does need handling
5674 ;; has been handled already.
5675 ;; So it is safe for us to inhibit *all* magic file name handlers.
5677 (defun file-name-non-special (operation &rest arguments
)
5678 (let ((file-name-handler-alist nil
)
5680 (if (eq operation
'insert-directory
)
5681 (directory-file-name
5683 (unhandled-file-name-directory default-directory
)))
5685 ;; Get a list of the indices of the args which are file names.
5687 (cdr (or (assq operation
5688 ;; The first six are special because they
5689 ;; return a file name. We want to include the /:
5690 ;; in the return value.
5691 ;; So just avoid stripping it in the first place.
5692 '((expand-file-name . nil
)
5693 (file-name-directory . nil
)
5694 (file-name-as-directory . nil
)
5695 (directory-file-name . nil
)
5696 (file-name-sans-versions . nil
)
5697 (find-backup-file-name . nil
)
5698 ;; `identity' means just return the first arg
5699 ;; not stripped of its quoting.
5700 (substitute-in-file-name identity
)
5701 ;; `add' means add "/:" to the result.
5702 (file-truename add
0)
5703 ;; `quote' means add "/:" to buffer-file-name.
5704 (insert-file-contents quote
0)
5705 ;; `unquote-then-quote' means set buffer-file-name
5706 ;; temporarily to unquoted filename.
5707 (verify-visited-file-modtime unquote-then-quote
)
5708 ;; List the arguments which are filenames.
5709 (file-name-completion 1)
5710 (file-name-all-completions 1)
5714 (make-symbolic-link 0 1)
5715 (add-name-to-file 0 1)))
5716 ;; For all other operations, treat the first argument only
5717 ;; as the file name.
5720 ;; Copy ARGUMENTS so we can replace elements in it.
5721 (arguments (copy-sequence arguments
)))
5722 (if (symbolp (car file-arg-indices
))
5723 (setq method
(pop file-arg-indices
)))
5724 ;; Strip off the /: from the file names that have it.
5726 (while (consp file-arg-indices
)
5727 (let ((pair (nthcdr (car file-arg-indices
) arguments
)))
5729 (string-match "\\`/:" (car pair
))
5731 (if (= (length (car pair
)) 2)
5733 (substring (car pair
) 2)))))
5734 (setq file-arg-indices
(cdr file-arg-indices
))))
5735 (cond ((eq method
'identity
)
5738 (concat "/:" (apply operation arguments
)))
5741 (apply operation arguments
)
5742 (setq buffer-file-name
(concat "/:" buffer-file-name
))))
5743 ((eq method
'unquote-then-quote
)
5745 (setq buffer-file-name
(substring buffer-file-name
2))
5746 (setq res
(apply operation arguments
))
5747 (setq buffer-file-name
(concat "/:" buffer-file-name
))
5750 (apply operation arguments
)))))
5752 ;; Symbolic modes and read-file-modes.
5754 (defun file-modes-char-to-who (char)
5755 "Convert CHAR to a numeric bit-mask for extracting mode bits.
5756 CHAR is in [ugoa] and represents the category of users (Owner, Group,
5757 Others, or All) for whom to produce the mask.
5758 The bit-mask that is returned extracts from mode bits the access rights
5759 for the specified category of users."
5760 (cond ((= char ?u
) #o4700
)
5761 ((= char ?g
) #o2070
)
5762 ((= char ?o
) #o1007
)
5763 ((= char ?a
) #o7777
)
5764 (t (error "%c: bad `who' character" char
))))
5766 (defun file-modes-char-to-right (char &optional from
)
5767 "Convert CHAR to a numeric value of mode bits.
5768 CHAR is in [rwxXstugo] and represents symbolic access permissions.
5769 If CHAR is in [Xugo], the value is taken from FROM (or 0 if omitted)."
5770 (or from
(setq from
0))
5771 (cond ((= char ?r
) #o0444
)
5772 ((= char ?w
) #o0222
)
5773 ((= char ?x
) #o0111
)
5774 ((= char ?s
) #o1000
)
5775 ((= char ?t
) #o6000
)
5776 ;; Rights relative to the previous file modes.
5777 ((= char ?X
) (if (= (logand from
#o111
) 0) 0 #o0111
))
5778 ((= char ?u
) (let ((uright (logand #o4700 from
)))
5779 (+ uright
(/ uright
#o10
) (/ uright
#o100
))))
5780 ((= char ?g
) (let ((gright (logand #o2070 from
)))
5781 (+ gright
(/ gright
#o10
) (* gright
#o10
))))
5782 ((= char ?o
) (let ((oright (logand #o1007 from
)))
5783 (+ oright
(* oright
#o10
) (* oright
#o100
))))
5784 (t (error "%c: bad right character" char
))))
5786 (defun file-modes-rights-to-number (rights who-mask
&optional from
)
5787 "Convert a symbolic mode string specification to an equivalent number.
5788 RIGHTS is the symbolic mode spec, it should match \"([+=-][rwxXstugo]+)+\".
5789 WHO-MASK is the bit-mask specifying the category of users to which to
5790 apply the access permissions. See `file-modes-char-to-who'.
5791 FROM (or 0 if nil) gives the mode bits on which to base permissions if
5792 RIGHTS request to add, remove, or set permissions based on existing ones,
5794 (let* ((num-rights (or from
0))
5795 (list-rights (string-to-list rights
))
5796 (op (pop list-rights
)))
5797 (while (memq op
'(?
+ ?- ?
=))
5800 (while (memq (setq char-right
(pop list-rights
))
5801 '(?r ?w ?x ?X ?s ?t ?u ?g ?o
))
5804 (file-modes-char-to-right char-right num-rights
))))
5805 (setq num-right
(logand who-mask num-right
)
5807 (cond ((= op ?
+) (logior num-rights num-right
))
5808 ((= op ?-
) (logand num-rights
(lognot num-right
)))
5809 (t (logior (logand num-rights
(lognot who-mask
)) num-right
)))
5813 (defun file-modes-symbolic-to-number (modes &optional from
)
5814 "Convert symbolic file modes to numeric file modes.
5815 MODES is the string to convert, it should match
5816 \"[ugoa]*([+-=][rwxXstugo]+)+,...\".
5817 See (info \"(coreutils)File permissions\") for more information on this
5819 FROM (or 0 if nil) gives the mode bits on which to base permissions if
5820 MODES request to add, remove, or set permissions based on existing ones,
5823 (let ((case-fold-search nil
)
5824 (num-modes (or from
0)))
5825 (while (/= (string-to-char modes
) 0)
5826 (if (string-match "^\\([ugoa]*\\)\\([+=-][rwxXstugo]+\\)+\\(,\\|\\)" modes
)
5827 (let ((num-who (apply 'logior
0
5828 (mapcar 'file-modes-char-to-who
5829 (match-string 1 modes
)))))
5831 (setq num-who
(default-file-modes)))
5833 (file-modes-rights-to-number (substring modes
(match-end 1))
5835 modes
(substring modes
(match-end 3))))
5836 (error "Parse error in modes near `%s'" (substring modes
0))))
5839 (defun read-file-modes (&optional prompt orig-file
)
5840 "Read file modes in octal or symbolic notation and return its numeric value.
5841 PROMPT is used as the prompt, default to `File modes (octal or symbolic): '.
5842 ORIG-FILE is the name of a file on whose mode bits to base returned
5843 permissions if what user types requests to add, remove, or set permissions
5844 based on existing mode bits, as in \"og+rX-w\"."
5845 (let* ((modes (or (if orig-file
(file-modes orig-file
) 0)
5846 (error "File not found")))
5847 (modestr (and (stringp orig-file
)
5848 (nth 8 (file-attributes orig-file
))))
5850 (and (stringp modestr
)
5851 (string-match "^.\\(...\\)\\(...\\)\\(...\\)$" modestr
)
5852 (replace-regexp-in-string
5854 (format "u=%s,g=%s,o=%s"
5855 (match-string 1 modestr
)
5856 (match-string 2 modestr
)
5857 (match-string 3 modestr
)))))
5858 (value (read-string (or prompt
"File modes (octal or symbolic): ")
5861 (if (string-match "^[0-7]+" value
)
5862 (string-to-number value
8)
5863 (file-modes-symbolic-to-number value modes
)))))
5866 ;; Trashcan handling.
5867 (defcustom trash-directory
(convert-standard-filename "~/.Trash")
5868 "Directory for `move-file-to-trash' to move files and directories to.
5869 This directory is only used when the function `system-move-file-to-trash' is
5870 not defined. Relative paths are interpreted relative to `default-directory'.
5871 See also `delete-by-moving-to-trash'."
5876 (declare-function system-move-file-to-trash
"w32fns.c" (filename))
5878 (defun move-file-to-trash (filename)
5879 "Move file (or directory) name FILENAME to the trash.
5880 This function is called by `delete-file' and `delete-directory' when
5881 `delete-by-moving-to-trash' is non-nil. On platforms that define
5882 `system-move-file-to-trash', that function is used to move FILENAME to the
5883 system trash, otherwise FILENAME is moved to `trash-directory'.
5884 Returns nil on success."
5885 (interactive "fMove file to trash: ")
5887 ((fboundp 'system-move-file-to-trash
)
5888 (system-move-file-to-trash filename
))
5890 (let* ((trash-dir (expand-file-name trash-directory
))
5891 (fn (directory-file-name (expand-file-name filename
)))
5892 (fn-nondir (file-name-nondirectory fn
))
5893 (new-fn (expand-file-name fn-nondir trash-dir
)))
5894 (or (file-directory-p trash-dir
)
5895 (make-directory trash-dir t
))
5896 (and (file-exists-p new-fn
)
5897 ;; make new-fn unique.
5898 ;; example: "~/.Trash/abc.txt" -> "~/.Trash/abc.txt.~1~"
5899 (let ((version-control t
))
5900 (setq new-fn
(car (find-backup-file-name new-fn
)))))
5901 ;; stop processing if fn is same or parent directory of trash-dir.
5902 (and (string-match fn trash-dir
)
5903 (error "Filename `%s' is same or parent directory of trash-directory"
5905 (let ((delete-by-moving-to-trash nil
))
5906 (rename-file fn new-fn
))))))
5909 (define-key ctl-x-map
"\C-f" 'find-file
)
5910 (define-key ctl-x-map
"\C-r" 'find-file-read-only
)
5911 (define-key ctl-x-map
"\C-v" 'find-alternate-file
)
5912 (define-key ctl-x-map
"\C-s" 'save-buffer
)
5913 (define-key ctl-x-map
"s" 'save-some-buffers
)
5914 (define-key ctl-x-map
"\C-w" 'write-file
)
5915 (define-key ctl-x-map
"i" 'insert-file
)
5916 (define-key esc-map
"~" 'not-modified
)
5917 (define-key ctl-x-map
"\C-d" 'list-directory
)
5918 (define-key ctl-x-map
"\C-c" 'save-buffers-kill-terminal
)
5919 (define-key ctl-x-map
"\C-q" 'toggle-read-only
)
5921 (define-key ctl-x-4-map
"f" 'find-file-other-window
)
5922 (define-key ctl-x-4-map
"r" 'find-file-read-only-other-window
)
5923 (define-key ctl-x-4-map
"\C-f" 'find-file-other-window
)
5924 (define-key ctl-x-4-map
"b" 'switch-to-buffer-other-window
)
5925 (define-key ctl-x-4-map
"\C-o" 'display-buffer
)
5927 (define-key ctl-x-5-map
"b" 'switch-to-buffer-other-frame
)
5928 (define-key ctl-x-5-map
"f" 'find-file-other-frame
)
5929 (define-key ctl-x-5-map
"\C-f" 'find-file-other-frame
)
5930 (define-key ctl-x-5-map
"r" 'find-file-read-only-other-frame
)
5931 (define-key ctl-x-5-map
"\C-o" 'display-buffer-other-frame
)
5933 ;; arch-tag: bc68d3ea-19ca-468b-aac6-3a4a7766101f
5934 ;;; files.el ends here