;;; files.el --- file input and output commands for Emacs
-;; Copyright (C) 1985, 86, 87, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002
-;;; Free Software Foundation, Inc.
+;; Copyright (C) 1985, 1986, 1987, 1992, 1993, 1994, 1995, 1996,
+;; 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
+;; 2006 Free Software Foundation, Inc.
;; Maintainer: FSF
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;; Code:
+(defvar font-lock-keywords)
+
+
(defgroup backup nil
"Backups of edited data files."
:group 'files)
(defcustom delete-auto-save-files t
"*Non-nil means delete auto-save file when a buffer is saved or killed.
-Note that auto-save file will not be deleted if the buffer is killed
+Note that the auto-save file will not be deleted if the buffer is killed
when it has unsaved changes."
:type 'boolean
:group 'auto-save)
:type 'boolean
:group 'find-file)
-(defcustom revert-without-query
- nil
+(defcustom revert-without-query nil
"*Specify which files should be reverted without query.
The value is a list of regular expressions.
If the file name matches one of these regular expressions,
(put 'buffer-file-number 'permanent-local t)
(defvar buffer-file-numbers-unique (not (memq system-type '(windows-nt)))
- "Non-nil means that buffer-file-number uniquely identifies files.")
+ "Non-nil means that `buffer-file-number' uniquely identifies files.")
(defvar buffer-file-read-only nil
"Non-nil if visited file was read-only when visited.")
:group 'backup)
(defcustom require-final-newline nil
- "*Value of t says silently ensure a file ends in a newline when it is saved.
-Non-nil but not t says ask user whether to add a newline when there isn't one.
-nil means don't add newlines."
- :type '(choice (const :tag "Off" nil)
- (const :tag "Add" t)
- (other :tag "Ask" ask))
+ "*Whether to add a newline automatically at the end of the file.
+
+A value of t means do this only when the file is about to be saved.
+A value of `visit' means do this right after the file is visited.
+A value of `visit-save' means do it at both of those times.
+Any other non-nil value means ask user whether to add a newline, when saving.
+nil means don't add newlines.
+
+Certain major modes set this locally to the value obtained
+from `mode-require-final-newline'."
+ :type '(choice (const :tag "When visiting" visit)
+ (const :tag "When saving" t)
+ (const :tag "When visiting or saving" visit-save)
+ (const :tag "Don't add newlines" nil)
+ (other :tag "Ask each time" ask))
:group 'editing-basics)
+(defcustom mode-require-final-newline t
+ "*Whether to add a newline at end of file, in certain major modes.
+Those modes set `require-final-newline' to this value when you enable them.
+They do so because they are often used for files that are supposed
+to end in newlines, and the question is how to arrange that.
+
+A value of t means do this only when the file is about to be saved.
+A value of `visit' means do this right after the file is visited.
+A value of `visit-save' means do it at both of those times.
+Any other non-nil value means ask user whether to add a newline, when saving.
+
+nil means do not add newlines. That is a risky choice in this variable
+since this value is used for modes for files that ought to have final newlines.
+So if you set this to nil, you must explicitly check and add
+a final newline, whenever you save a file that really needs one."
+ :type '(choice (const :tag "When visiting" visit)
+ (const :tag "When saving" t)
+ (const :tag "When visiting or saving" visit-save)
+ (const :tag "Don't add newlines" nil)
+ (other :tag "Ask each time" ask))
+ :group 'editing-basics
+ :version "22.1")
+
(defcustom auto-save-default t
"*Non-nil says by default do auto-saving of every file-visiting buffer."
:type 'boolean
:group 'auto-save)
(defcustom auto-save-file-name-transforms
- `(("\\`/[^/]*:\\(.+/\\)*\\(.*\\)"
+ `(("\\`/[^/]*:\\([^/]*/\\)*\\([^/]*\\)\\'"
;; Don't put "\\2" inside expand-file-name, since it will be
;; transformed to "/2" on DOS/Windows.
,(concat temporary-file-directory "\\2") t))
These functions are called as soon as the error is detected.
Variable `buffer-file-name' is already set up.
The functions are called in the order given until one of them returns non-nil.")
-(defvaralias 'find-file-not-found-hooks 'find-file-not-found-functions)
-(make-obsolete-variable
- 'find-file-not-found-hooks 'find-file-not-found-functions "21.4")
+(define-obsolete-variable-alias 'find-file-not-found-hooks
+ 'find-file-not-found-functions "22.1")
;;;It is not useful to make this a local variable.
;;;(put 'find-file-hooks 'permanent-local t)
-(defvar find-file-hook nil
+(defcustom find-file-hook nil
"List of functions to be called after a buffer is loaded from a file.
The buffer's local variables (if any) will have been processed before the
-functions are called.")
-(defvaralias 'find-file-hooks 'find-file-hook)
-(make-obsolete-variable 'find-file-hooks 'find-file-hook "21.4")
+functions are called."
+ :group 'find-file
+ :type 'hook
+ :options '(auto-insert)
+ :version "22.1")
+(define-obsolete-variable-alias 'find-file-hooks 'find-file-hook "22.1")
(defvar write-file-functions nil
"List of functions to be called before writing out a buffer to a file.
the visited file name with \\[set-visited-file-name], but not when you
change the major mode.
-See also `write-contents-functions'.")
+This hook is not run if any of the functions in
+`write-contents-functions' returns non-nil. Both hooks pertain
+to how to save a buffer to file, for instance, choosing a suitable
+coding system and setting mode bits. (See Info
+node `(elisp)Saving Buffers'.) To perform various checks or
+updates before the buffer is saved, use `before-save-hook'.")
(put 'write-file-functions 'permanent-local t)
-(defvaralias 'write-file-hooks 'write-file-functions)
-(make-obsolete-variable 'write-file-hooks 'write-file-functions "21.4")
+(define-obsolete-variable-alias 'write-file-hooks 'write-file-functions "22.1")
(defvar local-write-file-hooks nil)
(make-variable-buffer-local 'local-write-file-hooks)
(put 'local-write-file-hooks 'permanent-local t)
-(make-obsolete-variable 'local-write-file-hooks 'write-file-functions "21.4")
+(make-obsolete-variable 'local-write-file-hooks 'write-file-functions "22.1")
(defvar write-contents-functions nil
"List of functions to be called before writing out a buffer to a file.
If one of them returns non-nil, the file is considered already written
-and the rest are not called.
+and the rest are not called and neither are the functions in
+`write-file-functions'.
This variable is meant to be used for hooks that pertain to the
buffer's contents, not to the particular visited file; thus,
`set-visited-file-name' does not clear this variable; but changing the
major mode does clear it.
-See also `write-file-functions'.")
+For hooks that _do_ pertain to the particular visited file, use
+`write-file-functions'. Both this variable and
+`write-file-functions' relate to how a buffer is saved to file.
+To perform various checks or updates before the buffer is saved,
+use `before-save-hook'.")
(make-variable-buffer-local 'write-contents-functions)
-(defvaralias 'write-contents-hooks 'write-contents-functions)
-(make-obsolete-variable 'write-contents-hooks 'write-contents-functions "21.4")
+(define-obsolete-variable-alias 'write-contents-hooks
+ 'write-contents-functions "22.1")
(defcustom enable-local-variables t
"*Control use of local variables in files you visit.
The value can be t, nil or something else.
-A value of t means file local variables specifications are obeyed;
-nil means they are ignored; anything else means query.
+
+A value of t means file local variables specifications are obeyed
+if all the specified variable values are safe; if any values are
+not safe, Emacs queries you, once, whether to set them all.
+
+A value of nil means always ignore the file local variables.
+Any other value means always query you once whether to set them all.
+
This variable also controls use of major modes specified in
a -*- line.
"*Control processing of the \"variable\" `eval' in a file's local variables.
The value can be t, nil or something else.
A value of t means obey `eval' variables;
-nil means ignore them; anything else means query.
-
-The command \\[normal-mode] always obeys local-variables lists
-and ignores this variable."
+nil means ignore them; anything else means query."
:type '(choice (const :tag "Obey" t)
(const :tag "Ignore" nil)
(other :tag "Query" other))
(or (fboundp 'file-locked-p)
(defalias 'file-locked-p 'ignore))
-(defvar view-read-only nil
- "*Non-nil means buffers visiting files read-only, do it in view mode.")
+(defcustom view-read-only nil
+ "*Non-nil means buffers visiting files read-only do so in view mode.
+In fact, this means that all read-only buffers normally have
+View mode enabled, including buffers that are read-only because
+you visit a file you cannot alter, and buffers you make read-only
+using \\[toggle-read-only]."
+ :type 'boolean
+ :group 'view)
(put 'ange-ftp-completion-hook-function 'safe-magic t)
(defun ange-ftp-completion-hook-function (op &rest args)
(apply op args))))
(defun convert-standard-filename (filename)
- "Convert a standard file's name to something suitable for the current OS.
-This function's standard definition is trivial; it just returns the argument.
-However, on some systems, the function is redefined with a definition
-that really does change some file names to canonicalize certain
-patterns and to guarantee valid names."
+ "Convert a standard file's name to something suitable for the OS.
+This means to guarantee valid names and perhaps to canonicalize
+certain patterns.
+
+FILENAME should be an absolute file name since the conversion rules
+sometimes vary depending on the position in the file name. E.g. c:/foo
+is a valid DOS file name, but c:/bar/c:/foo is not.
+
+This function's standard definition is trivial; it just returns
+the argument. However, on Windows and DOS, replace invalid
+characters. On DOS, make sure to obey the 8.3 limitations. On
+Windows, turn Cygwin names into native names, and also turn
+slashes into backslashes if the shell requires it (see
+`w32-shell-dos-semantics').
+
+See Info node `(elisp)Standard File Names' for more details."
filename)
(defun read-directory-name (prompt &optional dir default-dirname mustmatch initial)
"Read directory name, prompting with PROMPT and completing in directory DIR.
Value is not expanded---you must call `expand-file-name' yourself.
-Default name to DEFAULT-DIRNAME if user enters a null string.
- (If DEFAULT-DIRNAME is omitted, the current buffer's directory is used,
- except that if INITIAL is specified, that combined with DIR is used.)
+Default name to DEFAULT-DIRNAME if user exits with the same
+non-empty string that was inserted by this function.
+ (If DEFAULT-DIRNAME is omitted, DIR combined with INITIAL is used,
+ or just DIR if INITIAL is nil.)
+If the user exits with an empty minibuffer, this function returns
+an empty string. (This can only happen if the user erased the
+pre-inserted contents or if `insert-default-directory' is nil.)
Fourth arg MUSTMATCH non-nil means require existing directory's name.
Non-nil and non-t means also require confirmation after completion.
Fifth arg INITIAL specifies text to start with.
-DIR defaults to current buffer's directory default."
+DIR should be an absolute directory name. It defaults to
+the value of `default-directory'."
(unless dir
(setq dir default-directory))
- (unless default-dirname
- (setq default-dirname
- (if initial (concat dir initial) default-directory)))
- (read-file-name prompt dir default-dirname mustmatch initial
+ (read-file-name prompt dir (or default-dirname
+ (if initial (expand-file-name initial dir)
+ dir))
+ mustmatch initial
'file-directory-p))
\f
Not actually set up until the first time you use it.")
(defun parse-colon-path (cd-path)
- "Explode a colon-separated search path into a list of directory names.
-\(For values of `colon' equal to `path-separator'.)"
+ "Explode a search path into a list of directory names.
+Directories are separated by occurrences of `path-separator'
+\(which is colon in GNU and GNU-like systems)."
;; We could use split-string here.
(and cd-path
- (let (cd-prefix cd-list (cd-start 0) cd-colon)
+ (let (cd-list (cd-start 0) cd-colon)
(setq cd-path (concat cd-path path-separator))
(while (setq cd-colon (string-match path-separator cd-path cd-start))
(setq cd-list
(defun cd (dir)
"Make DIR become the current buffer's default directory.
-If your environment includes a `CDPATH' variable, try each one of that
-colon-separated list of directories when resolving a relative directory name."
+If your environment includes a `CDPATH' variable, try each one of
+that list of directories (separated by occurrences of
+`path-separator') when resolving a relative directory name.
+The path separator is colon in GNU and GNU-like systems."
(interactive
(list (read-directory-name "Change default directory: "
default-directory default-directory
(defun locate-file (filename path &optional suffixes predicate)
"Search for FILENAME through PATH.
+If found, return the absolute file name of FILENAME, with its suffixes;
+otherwise return nil.
+PATH should be a list of directories to look in, like the lists in
+`exec-path' or `load-path'.
If SUFFIXES is non-nil, it should be a list of suffixes to append to
file name when searching. If SUFFIXES is nil, it is equivalent to '(\"\").
+Use '(\"/\") to disable PATH search, but still try the suffixes in SUFFIXES.
If non-nil, PREDICATE is used instead of `file-readable-p'.
PREDICATE can also be an integer to pass to the `access' system call,
in which case file-name handlers are ignored. This usage is deprecated.
(defun locate-file-completion (string path-and-suffixes action)
"Do completion for file names passed to `locate-file'.
-PATH-AND-SUFFIXES is a pair of lists (DIRECTORIES . SUFFIXES)."
+PATH-AND-SUFFIXES is a pair of lists, (DIRECTORIES . SUFFIXES)."
(if (file-name-absolute-p string)
(read-file-name-internal string nil action)
(let ((names nil)
(suffix (concat (regexp-opt (cdr path-and-suffixes) t) "\\'"))
(string-dir (file-name-directory string)))
(dolist (dir (car path-and-suffixes))
+ (unless dir
+ (setq dir default-directory))
(if string-dir (setq dir (expand-file-name string-dir dir)))
(when (file-directory-p dir)
(dolist (file (file-name-all-completions
((null action) (try-completion string names))
(t (test-completion string names))))))
+(defun executable-find (command)
+ "Search for COMMAND in `exec-path' and return the absolute file name.
+Return nil if COMMAND is not found anywhere in `exec-path'."
+ ;; Use 1 rather than file-executable-p to better match the behavior of
+ ;; call-process.
+ (locate-file command exec-path exec-suffixes 1))
+
(defun load-library (library)
"Load the library named LIBRARY.
This is an interface to the function `load'."
(interactive
(list (completing-read "Load library: "
'locate-file-completion
- (cons load-path load-suffixes))))
+ (cons load-path (get-load-suffixes)))))
(load library))
(defun file-remote-p (file)
- "Test whether FILE specifies a location on a remote system."
- (let ((handler (find-file-name-handler file 'file-local-copy)))
+ "Test whether FILE specifies a location on a remote system.
+Return an identification of the system if the location is indeed
+remote. The identification of the system may comprise a method
+to access the system and its hostname, amongst other things.
+
+For example, the filename \"/user@host:/foo\" specifies a location
+on the system \"/user@host:\"."
+ (let ((handler (find-file-name-handler file 'file-remote-p)))
(if handler
- (get handler 'file-remote-p))))
+ (funcall handler 'file-remote-p file)
+ nil)))
(defun file-local-copy (file)
"Copy the file FILE into a temporary file on this machine.
both at the level of the file and at the level of the directories
containing it, until no links are left at any level.
-The arguments COUNTER and PREV-DIRS are used only in recursive calls.
-Do not specify them in other calls."
- ;; COUNTER can be a cons cell whose car is the count of how many more links
- ;; to chase before getting an error.
+\(fn FILENAME)" ;; Don't document the optional arguments.
+ ;; COUNTER and PREV-DIRS are only used in recursive calls.
+ ;; COUNTER can be a cons cell whose car is the count of how many
+ ;; more links to chase before getting an error.
;; PREV-DIRS can be a cons cell whose car is an alist
;; of truenames we've just recently computed.
+ (cond ((or (string= filename "") (string= filename "~"))
+ (setq filename (expand-file-name filename))
+ (if (string= filename "")
+ (setq filename "/")))
+ ((and (string= (substring filename 0 1) "~")
+ (string-match "~[^/]*/?" filename))
+ (let ((first-part
+ (substring filename 0 (match-end 0)))
+ (rest (substring filename (match-end 0))))
+ (setq filename (concat (expand-file-name first-part) rest)))))
- ;; The last test looks dubious, maybe `+' is meant here? --simon.
- (if (or (string= filename "") (string= filename "~")
- (and (string= (substring filename 0 1) "~")
- (string-match "~[^/]*" filename)))
- (progn
- (setq filename (expand-file-name filename))
- (if (string= filename "")
- (setq filename "/"))))
(or counter (setq counter (list 100)))
(let (done
;; For speed, remove the ange-ftp completion handler from the list.
(setq count (1+ count))))
newname))
+(defun make-temp-file (prefix &optional dir-flag suffix)
+ "Create a temporary file.
+The returned file name (created by appending some random characters at the end
+of PREFIX, and expanding against `temporary-file-directory' if necessary),
+is guaranteed to point to a newly created empty file.
+You can then use `write-region' to write new data into the file.
+
+If DIR-FLAG is non-nil, create a new empty directory instead of a file.
+
+If SUFFIX is non-nil, add that at the end of the file name."
+ (let ((umask (default-file-modes))
+ file)
+ (unwind-protect
+ (progn
+ ;; Create temp files with strict access rights. It's easy to
+ ;; loosen them later, whereas it's impossible to close the
+ ;; time-window of loose permissions otherwise.
+ (set-default-file-modes ?\700)
+ (while (condition-case ()
+ (progn
+ (setq file
+ (make-temp-name
+ (expand-file-name prefix temporary-file-directory)))
+ (if suffix
+ (setq file (concat file suffix)))
+ (if dir-flag
+ (make-directory file)
+ (write-region "" nil file nil 'silent nil 'excl))
+ nil)
+ (file-already-exists t))
+ ;; the file was somehow created by someone else between
+ ;; `make-temp-name' and `write-region', let's try again.
+ nil)
+ file)
+ ;; Reset the umask.
+ (set-default-file-modes umask))))
+
(defun recode-file-name (file coding new-coding &optional ok-if-already-exists)
"Change the encoding of FILE's name from CODING to NEW-CODING.
The value is a new name of FILE.
Signals a `file-already-exists' error if a file of the new name
-already exists unless optional third argument OK-IF-ALREADY-EXISTS
-is non-nil. A number as third arg means request confirmation if
+already exists unless optional fourth argument OK-IF-ALREADY-EXISTS
+is non-nil. A number as fourth arg means request confirmation if
the new name already exists. This is what happens in interactive
use with M-x."
(interactive
default-coding))
(setq from-coding (read-coding-system
(format "Recode filename %s from: " filename))))
-
+
;; We provide the default coding only when a user is going to
;; change the encoding not from the default coding.
(if (eq from-coding default-coding)
\f
(defun switch-to-buffer-other-window (buffer &optional norecord)
"Select buffer BUFFER in another window.
+If BUFFER does not identify an existing buffer, then this function
+creates a buffer with that name.
+
+When called from Lisp, BUFFER can be a buffer, a string \(a buffer name),
+or nil. If BUFFER is nil, then this function chooses a buffer
+using `other-buffer'.
Optional second arg NORECORD non-nil means
do not put this buffer at the front of the list of recently selected ones.
+This function returns the buffer it switched to.
This uses the function `display-buffer' as a subroutine; see its
documentation for additional customization information."
(interactive "BSwitch to buffer in other window: ")
- (let ((pop-up-windows t))
+ (let ((pop-up-windows t)
+ ;; Don't let these interfere.
+ same-window-buffer-names same-window-regexps)
(pop-to-buffer buffer t norecord)))
(defun switch-to-buffer-other-frame (buffer &optional norecord)
This uses the function `display-buffer' as a subroutine; see its
documentation for additional customization information."
(interactive "BSwitch to buffer in other frame: ")
- (let ((pop-up-frames t))
+ (let ((pop-up-frames t)
+ same-window-buffer-names same-window-regexps)
(pop-to-buffer buffer t norecord)
(raise-frame (window-frame (selected-window)))))
+(defun display-buffer-other-frame (buffer)
+ "Switch to buffer BUFFER in another frame.
+This uses the function `display-buffer' as a subroutine; see its
+documentation for additional customization information."
+ (interactive "BDisplay buffer in other frame: ")
+ (let ((pop-up-frames t)
+ same-window-buffer-names same-window-regexps
+ (old-window (selected-window))
+ new-window)
+ (setq new-window (display-buffer buffer t))
+ (lower-frame (window-frame new-window))
+ (make-frame-invisible (window-frame old-window))
+ (make-frame-visible (window-frame old-window))))
+
(defvar find-file-default nil
"Used within `find-file-read-args'.")
+(defmacro minibuffer-with-setup-hook (fun &rest body)
+ "Add FUN to `minibuffer-setup-hook' while executing BODY.
+BODY should use the minibuffer at most once.
+Recursive uses of the minibuffer will not be affected."
+ (declare (indent 1) (debug t))
+ (let ((hook (make-symbol "setup-hook")))
+ `(let (,hook)
+ (setq ,hook
+ (lambda ()
+ ;; Clear out this hook so it does not interfere
+ ;; with any recursive minibuffer usage.
+ (remove-hook 'minibuffer-setup-hook ,hook)
+ (,fun)))
+ (unwind-protect
+ (progn
+ (add-hook 'minibuffer-setup-hook ,hook)
+ ,@body)
+ (remove-hook 'minibuffer-setup-hook ,hook)))))
+
(defun find-file-read-args (prompt mustmatch)
(list (let ((find-file-default
(and buffer-file-name
- (abbreviate-file-name buffer-file-name)))
- (munge-default-fun
- (lambda ()
- (setq minibuffer-default find-file-default)
- ;; Clear out this hook so it does not interfere
- ;; with any recursive minibuffer usage.
- (pop minibuffer-setup-hook)))
- (minibuffer-setup-hook
- minibuffer-setup-hook))
- (add-hook 'minibuffer-setup-hook munge-default-fun)
- (read-file-name prompt nil default-directory mustmatch))
+ (abbreviate-file-name buffer-file-name))))
+ (minibuffer-with-setup-hook
+ (lambda () (setq minibuffer-default find-file-default))
+ (read-file-name prompt nil default-directory mustmatch)))
t))
(defun find-file (filename &optional wildcards)
type M-n to pull it into the minibuffer.
Interactively, or if WILDCARDS is non-nil in a call from Lisp,
-expand wildcards (if any) and visit multiple files. Wildcard expansion
-can be suppressed by setting `find-file-wildcards'."
- (interactive
- (find-file-read-args "Find file: " nil))
+expand wildcards (if any) and visit multiple files. You can
+suppress wildcard expansion by setting `find-file-wildcards' to nil.
+
+To visit a file without any kind of conversion and without
+automatically choosing a major mode, use \\[find-file-literally]."
+ (interactive (find-file-read-args "Find file: " nil))
(let ((value (find-file-noselect filename nil nil wildcards)))
(if (listp value)
(mapcar 'switch-to-buffer (nreverse value))
(if (listp value)
(progn
(setq value (nreverse value))
- (switch-to-buffer-other-window (car value))
- (mapcar 'switch-to-buffer (cdr value)))
+ (cons (switch-to-buffer-other-window (car value))
+ (mapcar 'switch-to-buffer (cdr value))))
(switch-to-buffer-other-window value))))
(defun find-file-other-frame (filename &optional wildcards)
(if (listp value)
(progn
(setq value (nreverse value))
- (switch-to-buffer-other-frame (car value))
- (mapcar 'switch-to-buffer (cdr value)))
+ (cons (switch-to-buffer-other-frame (car value))
+ (mapcar 'switch-to-buffer (cdr value))))
(switch-to-buffer-other-frame value))))
+(defun find-file-existing (filename &optional wildcards)
+ "Edit the existing file FILENAME.
+Like \\[find-file] but only allow a file that exists."
+ (interactive (find-file-read-args "Find existing file: " t))
+ (unless (file-exists-p filename) (error "%s does not exist" filename))
+ (find-file filename wildcards)
+ (current-buffer))
+
(defun find-file-read-only (filename &optional wildcards)
"Edit file FILENAME but don't allow changes.
Like \\[find-file] but marks buffer as read-only.
Use \\[toggle-read-only] to permit editing."
- (interactive (find-file-read-args "Find file read-only: " t))
- (find-file filename wildcards)
- (toggle-read-only 1)
- (current-buffer))
+ (interactive (find-file-read-args "Find file read-only: " nil))
+ (unless (or (and wildcards find-file-wildcards
+ (not (string-match "\\`/:" filename))
+ (string-match "[[*?]" filename))
+ (file-exists-p filename))
+ (error "%s does not exist" filename))
+ (let ((value (find-file filename wildcards)))
+ (mapc (lambda (b) (with-current-buffer b (toggle-read-only 1)))
+ (if (listp value) value (list value)))
+ value))
(defun find-file-read-only-other-window (filename &optional wildcards)
"Edit file FILENAME in another window but don't allow changes.
Like \\[find-file-other-window] but marks buffer as read-only.
Use \\[toggle-read-only] to permit editing."
- (interactive (find-file-read-args "Find file read-only other window: " t))
- (find-file-other-window filename wildcards)
- (toggle-read-only 1)
- (current-buffer))
+ (interactive (find-file-read-args "Find file read-only other window: " nil))
+ (unless (or (and wildcards find-file-wildcards
+ (not (string-match "\\`/:" filename))
+ (string-match "[[*?]" filename))
+ (file-exists-p filename))
+ (error "%s does not exist" filename))
+ (let ((value (find-file-other-window filename wildcards)))
+ (mapc (lambda (b) (with-current-buffer b (toggle-read-only 1)))
+ (if (listp value) value (list value)))
+ value))
(defun find-file-read-only-other-frame (filename &optional wildcards)
"Edit file FILENAME in another frame but don't allow changes.
Like \\[find-file-other-frame] but marks buffer as read-only.
Use \\[toggle-read-only] to permit editing."
- (interactive (find-file-read-args "Find file read-only other frame: " t))
- (find-file-other-frame filename wildcards)
- (toggle-read-only 1)
- (current-buffer))
-
-(defun find-alternate-file-other-window (filename)
+ (interactive (find-file-read-args "Find file read-only other frame: " nil))
+ (unless (or (and wildcards find-file-wildcards
+ (not (string-match "\\`/:" filename))
+ (string-match "[[*?]" filename))
+ (file-exists-p filename))
+ (error "%s does not exist" filename))
+ (let ((value (find-file-other-frame filename wildcards)))
+ (mapc (lambda (b) (with-current-buffer b (toggle-read-only 1)))
+ (if (listp value) value (list value)))
+ value))
+
+(defun find-alternate-file-other-window (filename &optional wildcards)
"Find file FILENAME as a replacement for the file in the next window.
-This command does not select that window."
+This command does not select that window.
+
+Interactively, or if WILDCARDS is non-nil in a call from Lisp,
+expand wildcards (if any) and replace the file with multiple files."
(interactive
(save-selected-window
(other-window 1)
(setq file-name (file-name-nondirectory file)
file-dir (file-name-directory file)))
(list (read-file-name
- "Find alternate file: " file-dir nil nil file-name)))))
+ "Find alternate file: " file-dir nil nil file-name)
+ t))))
(if (one-window-p)
- (find-file-other-window filename)
+ (find-file-other-window filename wildcards)
(save-selected-window
(other-window 1)
- (find-alternate-file filename))))
+ (find-alternate-file filename wildcards))))
-(defun find-alternate-file (filename)
+(defun find-alternate-file (filename &optional wildcards)
"Find file FILENAME, select its buffer, kill previous buffer.
If the current buffer now contains an empty file that you just visited
-\(presumably by mistake), use this command to visit the file you really want."
+\(presumably by mistake), use this command to visit the file you really want.
+
+Interactively, or if WILDCARDS is non-nil in a call from Lisp,
+expand wildcards (if any) and replace the file with multiple files."
(interactive
(let ((file buffer-file-name)
(file-name nil)
(setq file-name (file-name-nondirectory file)
file-dir (file-name-directory file)))
(list (read-file-name
- "Find alternate file: " file-dir nil nil file-name))))
+ "Find alternate file: " file-dir nil nil file-name)
+ t)))
(unless (run-hook-with-args-until-failure 'kill-buffer-query-functions)
(error "Aborted"))
(when (and (buffer-modified-p) (buffer-file-name))
(setq buffer-file-truename nil)
;; Likewise for dired buffers.
(setq dired-directory nil)
- (find-file filename))
+ (find-file filename wildcards))
(when (eq obuf (current-buffer))
;; This executes if find-file gets an error
;; and does not really find anything.
"Return the buffer visiting file FILENAME (a string).
This is like `get-file-buffer', except that it checks for any buffer
visiting the same file, possibly under a different name.
-If PREDICATE is non-nil, only a buffer satisfying it can be returned.
+If PREDICATE is non-nil, only buffers satisfying it are eligible,
+and others are ignored.
If there is no such live buffer, return nil."
(let ((predicate (or predicate #'identity))
(truename (abbreviate-file-name (file-truename filename))))
:version "21.1"
:type 'boolean)
+(defcustom large-file-warning-threshold 10000000
+ "Maximum size of file above which a confirmation is requested.
+When nil, never request confirmation."
+ :group 'files
+ :group 'find-file
+ :version "22.1"
+ :type '(choice integer (const :tag "Never request confirmation" nil)))
+
(defun find-file-noselect (filename &optional nowarn rawfile wildcards)
"Read file FILENAME into a buffer and return the buffer.
If a buffer exists visiting FILENAME, return that one, but
verify that the file has not changed since visited or saved.
The buffer is not selected, just returned to the caller.
-Optional first arg NOWARN non-nil means suppress any warning messages.
-Optional second arg RAWFILE non-nil means the file is read literally.
-Optional third arg WILDCARDS non-nil means do wildcard processing
+Optional second arg NOWARN non-nil means suppress any warning messages.
+Optional third arg RAWFILE non-nil means the file is read literally.
+Optional fourth arg WILDCARDS non-nil means do wildcard processing
and visit all the matching files. When wildcards are actually
-used and expanded, the value is a list of buffers
-that are visiting the various files."
+used and expanded, return a list of buffers that are visiting
+the various files."
(setq filename
(abbreviate-file-name
(expand-file-name filename)))
(mapcar #'find-file-noselect files)))
(let* ((buf (get-file-buffer filename))
(truename (abbreviate-file-name (file-truename filename)))
- (number (nthcdr 10 (file-attributes truename)))
+ (attributes (file-attributes truename))
+ (number (nthcdr 10 attributes))
;; Find any buffer for a file which has same truename.
(other (and (not buf) (find-buffer-visiting filename))))
;; Let user know if there is a buffer with the same truename.
;; Optionally also find that buffer.
(if (or find-file-existing-other-name find-file-visit-truename)
(setq buf other))))
+ ;; Check to see if the file looks uncommonly large.
+ (when (and large-file-warning-threshold (nth 7 attributes)
+ ;; Don't ask again if we already have the file or
+ ;; if we're asked to be quiet.
+ (not (or buf nowarn))
+ (> (nth 7 attributes) large-file-warning-threshold)
+ (not (y-or-n-p
+ (format "File %s is large (%dMB), really open? "
+ (file-name-nondirectory filename)
+ (/ (nth 7 attributes) 1048576)))))
+ (error "Aborted"))
(if buf
;; We are using an existing buffer.
(progn
buf)
;; Create a new buffer.
(setq buf (create-file-buffer filename))
- (set-buffer-major-mode buf)
;; find-file-noselect-1 may use a different buffer.
(find-file-noselect-1 buf filename nowarn
rawfile truename number))))))
(defun find-file-noselect-1 (buf filename nowarn rawfile truename number)
- (let ((inhibit-read-only t)
- error)
+ (let (error)
(with-current-buffer buf
(kill-local-variable 'find-file-literally)
;; Needed in case we are re-visiting the file with a different
;; text representation.
(kill-local-variable 'buffer-file-coding-system)
(kill-local-variable 'cursor-type)
- (erase-buffer)
+ (let ((inhibit-read-only t))
+ (erase-buffer))
(and (default-value 'enable-multibyte-characters)
(not rawfile)
(set-buffer-multibyte t))
(if rawfile
(condition-case ()
- (insert-file-contents-literally filename t)
+ (let ((inhibit-read-only t))
+ (insert-file-contents-literally filename t))
(file-error
(when (and (file-exists-p filename)
(not (file-readable-p filename)))
;; Unconditionally set error
(setq error t)))
(condition-case ()
- (insert-file-contents filename t)
+ (let ((inhibit-read-only t))
+ (insert-file-contents filename t))
(file-error
(when (and (file-exists-p filename)
(not (file-readable-p filename)))
(progn
(set-buffer-multibyte nil)
(setq buffer-file-coding-system 'no-conversion)
+ (set-buffer-major-mode buf)
(make-local-variable 'find-file-literally)
(setq find-file-literally t))
(after-find-file error (not nowarn)))
(coding-system-for-read 'no-conversion)
(coding-system-for-write 'no-conversion)
(find-buffer-file-type-function
- (if (fboundp 'find-buffer-file-type)
- (symbol-function 'find-buffer-file-type)
- nil))
- (inhibit-file-name-handlers '(jka-compr-handler image-file-handler))
- (inhibit-file-name-operation 'insert-file-contents))
+ (if (fboundp 'find-buffer-file-type)
+ (symbol-function 'find-buffer-file-type)
+ nil))
+ (inhibit-file-name-handlers
+ (append '(jka-compr-handler image-file-handler)
+ inhibit-file-name-handlers))
+ (inhibit-file-name-operation 'insert-file-contents))
(unwind-protect
- (progn
- (fset 'find-buffer-file-type (lambda (filename) t))
- (insert-file-contents filename visit beg end replace))
+ (progn
+ (fset 'find-buffer-file-type (lambda (filename) t))
+ (insert-file-contents filename visit beg end replace))
(if find-buffer-file-type-function
(fset 'find-buffer-file-type find-buffer-file-type-function)
(fmakunbound 'find-buffer-file-type)))))
(setq buffer-read-only nil))
(t
(setq buffer-read-only nil)
- (if (file-exists-p (file-name-directory (directory-file-name (file-name-directory buffer-file-name))))
- "Use M-x make-directory RET RET to create the directory"
- "Use C-u M-x make-directory RET RET to create directory and its parents")))))
+ "Use M-x make-directory RET RET to create the directory and its parents"))))
(when msg
(message "%s" msg)
- (or not-serious (sit-for 1 nil t))))
+ (or not-serious (sit-for 1 t))))
(when (and auto-save-default (not noauto))
(auto-save-mode t)))
;; Make people do a little extra work (C-x C-q)
(when (and view-read-only view-mode)
(view-mode-disable))
(normal-mode t)
+ ;; If requested, add a newline at the end of the file.
+ (and (memq require-final-newline '(visit visit-save))
+ (> (point-max) (point-min))
+ (/= (char-after (1- (point-max))) ?\n)
+ (not (and (eq selective-display t)
+ (= (char-after (1- (point-max))) ?\r)))
+ (save-excursion
+ (goto-char (point-max))
+ (insert "\n")))
(when (and buffer-read-only
view-read-only
(not (eq (get major-mode 'mode-class) 'special)))
(view-mode-enter))
(run-hooks 'find-file-hook)))
+(defmacro report-errors (format &rest body)
+ "Eval BODY and turn any error into a FORMAT message.
+FORMAT can have a %s escape which will be replaced with the actual error.
+If `debug-on-error' is set, errors are not caught, so that you can
+debug them.
+Avoid using a large BODY since it is duplicated."
+ (declare (debug t) (indent 1))
+ `(if debug-on-error
+ (progn . ,body)
+ (condition-case err
+ (progn . ,body)
+ (error (message ,format (prin1-to-string err))))))
+
(defun normal-mode (&optional find-file)
"Choose the major mode for this buffer automatically.
Also sets up any specified local variables of the file.
or from Lisp without specifying the optional argument FIND-FILE;
in that case, this function acts as if `enable-local-variables' were t."
(interactive)
- (or find-file (funcall (or default-major-mode 'fundamental-mode)))
- (condition-case err
- (set-auto-mode)
- (error (message "File mode specification error: %s"
- (prin1-to-string err))))
- (condition-case err
- (let ((enable-local-variables (or (not find-file)
- enable-local-variables)))
- (hack-local-variables))
- (error (message "File local-variables error: %s"
- (prin1-to-string err))))
+ (funcall (or default-major-mode 'fundamental-mode))
+ (let ((enable-local-variables (or (not find-file) enable-local-variables)))
+ (report-errors "File mode specification error: %s"
+ (set-auto-mode))
+ (report-errors "File local-variables error: %s"
+ (hack-local-variables)))
+ ;; Turn font lock off and on, to make sure it takes account of
+ ;; whatever file local variables are relevant to it.
+ (when (and font-lock-mode
+ ;; Font-lock-mode (now in font-core.el) can be ON when
+ ;; font-lock.el still hasn't been loaded.
+ (boundp 'font-lock-keywords)
+ (eq (car font-lock-keywords) t))
+ (setq font-lock-keywords (cadr font-lock-keywords))
+ (font-lock-mode 1))
+
(if (fboundp 'ucs-set-table-for-input) ; don't lose when building
(ucs-set-table-for-input)))
(defvar auto-mode-alist
+ ;; Note: The entries for the modes defined in cc-mode.el (c-mode,
+ ;; c++-mode, java-mode and more) are added through autoload
+ ;; directives in that file. That way is discouraged since it
+ ;; spreads out the definition of the initial value.
(mapc
(lambda (elt)
(cons (purecopy (car elt)) (cdr elt)))
- '(("\\.te?xt\\'" . text-mode)
- ("\\.c\\'" . c-mode)
- ("\\.h\\'" . c-mode)
- ("\\.tex\\'" . tex-mode)
+ `(;; do this first, so that .html.pl is Polish html, not Perl
+ ("\\.s?html?\\(\\.[a-zA-Z_]+\\)?\\'" . html-mode)
+ ("\\.te?xt\\'" . text-mode)
+ ("\\.[tT]e[xX]\\'" . tex-mode)
+ ("\\.ins\\'" . tex-mode) ;Installation files for TeX packages.
("\\.ltx\\'" . latex-mode)
+ ("\\.dtx\\'" . doctex-mode)
("\\.el\\'" . emacs-lisp-mode)
- ("\\.scm\\'" . scheme-mode)
+ ("\\.\\(scm\\|stk\\|ss\\|sch\\)\\'" . scheme-mode)
("\\.l\\'" . lisp-mode)
- ("\\.lisp\\'" . lisp-mode)
- ("\\.f\\'" . fortran-mode)
- ("\\.F\\'" . fortran-mode)
+ ("\\.li?sp\\'" . lisp-mode)
+ ("\\.[fF]\\'" . fortran-mode)
("\\.for\\'" . fortran-mode)
("\\.p\\'" . pascal-mode)
("\\.pas\\'" . pascal-mode)
("\\.ad[abs]\\'" . ada-mode)
("\\.ad[bs].dg\\'" . ada-mode)
- ("\\.\\([pP]\\([Llm]\\|erl\\)\\|al\\)\\'" . perl-mode)
- ("\\.s?html?\\'" . html-mode)
- ("\\.cc\\'" . c++-mode)
- ("\\.hh\\'" . c++-mode)
- ("\\.hpp\\'" . c++-mode)
- ("\\.C\\'" . c++-mode)
- ("\\.H\\'" . c++-mode)
- ("\\.cpp\\'" . c++-mode)
- ("\\.cxx\\'" . c++-mode)
- ("\\.hxx\\'" . c++-mode)
- ("\\.c\\+\\+\\'" . c++-mode)
- ("\\.h\\+\\+\\'" . c++-mode)
- ("\\.m\\'" . objc-mode)
- ("\\.java\\'" . java-mode)
- ("\\.mk\\'" . makefile-mode)
- ("\\(M\\|m\\|GNUm\\)akefile\\'" . makefile-mode)
- ("\\.am\\'" . makefile-mode) ;For Automake.
+ ("\\.\\([pP]\\([Llm]\\|erl\\|od\\)\\|al\\)\\'" . perl-mode)
+ ("Imakefile\\'" . makefile-imake-mode)
+ ,@(if (memq system-type '(berkeley-unix next-mach darwin))
+ '(("\\.mk\\'" . makefile-bsdmake-mode)
+ ("GNUmakefile\\'" . makefile-gmake-mode)
+ ("[Mm]akefile\\'" . makefile-bsdmake-mode))
+ '(("\\.mk\\'" . makefile-gmake-mode) ; Might be any make, give Gnu the host advantage
+ ("[Mm]akefile\\'" . makefile-gmake-mode)))
+ ("Makeppfile\\'" . makefile-makepp-mode)
+ ("\\.am\\'" . makefile-automake-mode)
;; Less common extensions come here
;; so more common ones above are found faster.
("\\.texinfo\\'" . texinfo-mode)
("\\.te?xi\\'" . texinfo-mode)
- ("\\.s\\'" . asm-mode)
- ("\\.S\\'" . asm-mode)
+ ("\\.[sS]\\'" . asm-mode)
("\\.asm\\'" . asm-mode)
- ("ChangeLog\\'" . change-log-mode)
- ("change\\.log\\'" . change-log-mode)
- ("changelo\\'" . change-log-mode)
- ("ChangeLog\\.[0-9]+\\'" . change-log-mode)
- ;; for MSDOS and MS-Windows (which are case-insensitive)
- ("changelog\\'" . change-log-mode)
- ("changelog\\.[0-9]+\\'" . change-log-mode)
+ ("[cC]hange\\.?[lL]og?\\'" . change-log-mode)
+ ("[cC]hange[lL]og\\.[0-9]+\\'" . change-log-mode)
("\\$CHANGE_LOG\\$\\.TXT" . change-log-mode)
("\\.scm\\.[0-9]*\\'" . scheme-mode)
("\\.[ck]?sh\\'\\|\\.shar\\'\\|/\\.z?profile\\'" . sh-mode)
("\\(/\\|\\`\\)\\.\\(bash_logout\\|shrc\\|[kz]shrc\\|bashrc\\|t?cshrc\\|esrc\\)\\'" . sh-mode)
("\\(/\\|\\`\\)\\.\\([kz]shenv\\|xinitrc\\|startxrc\\|xsession\\)\\'" . sh-mode)
("\\.m?spec\\'" . sh-mode)
- ("\\.mm\\'" . nroff-mode)
- ("\\.me\\'" . nroff-mode)
- ("\\.ms\\'" . nroff-mode)
+ ("\\.m[mes]\\'" . nroff-mode)
("\\.man\\'" . nroff-mode)
- ("\\.\\(u?lpc\\|pike\\|pmod\\)\\'" . pike-mode)
- ("\\.TeX\\'" . tex-mode)
("\\.sty\\'" . latex-mode)
- ("\\.cls\\'" . latex-mode) ;LaTeX 2e class
- ("\\.clo\\'" . latex-mode) ;LaTeX 2e class option
+ ("\\.cl[so]\\'" . latex-mode) ;LaTeX 2e class option
("\\.bbl\\'" . latex-mode)
("\\.bib\\'" . bibtex-mode)
("\\.sql\\'" . sql-mode)
- ("\\.m4\\'" . m4-mode)
- ("\\.mc\\'" . m4-mode)
+ ("\\.m[4c]\\'" . m4-mode)
("\\.mf\\'" . metafont-mode)
("\\.mp\\'" . metapost-mode)
("\\.vhdl?\\'" . vhdl-mode)
("\\.article\\'" . text-mode)
("\\.letter\\'" . text-mode)
- ("\\.tcl\\'" . tcl-mode)
+ ("\\.i?tcl\\'" . tcl-mode)
("\\.exp\\'" . tcl-mode)
- ("\\.itcl\\'" . tcl-mode)
("\\.itk\\'" . tcl-mode)
("\\.icn\\'" . icon-mode)
("\\.sim\\'" . simula-mode)
("\\.mss\\'" . scribe-mode)
- ("\\.f90\\'" . f90-mode)
- ("\\.f95\\'" . f90-mode)
+ ("\\.f9[05]\\'" . f90-mode)
("\\.indent\\.pro\\'" . fundamental-mode) ; to avoid idlwave-mode
("\\.pro\\'" . idlwave-mode)
- ("\\.lsp\\'" . lisp-mode)
- ("\\.awk\\'" . awk-mode)
("\\.prolog\\'" . prolog-mode)
("\\.tar\\'" . tar-mode)
- ("\\.\\(arc\\|zip\\|lzh\\|zoo\\|ear\\|jar\\|war\\)\\'" . archive-mode)
- ("\\.\\(ARC\\|ZIP\\|LZH\\|ZOO\\|EAR\\|JAR\\|WAR\\)\\'" . archive-mode)
- ("\\.sx[dmicw]\\'" . archive-mode) ; OpenOffice.org
+ ;; The list of archive file extensions should be in sync with
+ ;; `auto-coding-alist' with `no-conversion' coding system.
+ ("\\.\\(arc\\|zip\\|lzh\\|zoo\\|[jew]ar\\|xpi\\)\\'" . archive-mode)
+ ("\\.\\(ARC\\|ZIP\\|LZH\\|ZOO\\|[JEW]AR\\|XPI\\)\\'" . archive-mode)
+ ("\\.\\(sx[dmicw]\\|odt\\)\\'" . archive-mode) ; OpenOffice.org
;; Mailer puts message to be edited in
;; /tmp/Re.... or Message
("\\`/tmp/Re" . text-mode)
("/Message[0-9]*\\'" . text-mode)
- ("/drafts/[0-9]+\\'" . mh-letter-mode)
("\\.zone\\'" . zone-mode)
;; some news reader is reported to use this
("\\`/tmp/fol/" . text-mode)
- ("\\.y\\'" . c-mode)
- ("\\.lex\\'" . c-mode)
("\\.oak\\'" . scheme-mode)
("\\.sgml?\\'" . sgml-mode)
- ("\\.xml\\'" . sgml-mode)
- ("\\.xsl\\'" . sgml-mode)
+ ("\\.x[ms]l\\'" . xml-mode)
("\\.dtd\\'" . sgml-mode)
("\\.ds\\(ss\\)?l\\'" . dsssl-mode)
- ("\\.idl\\'" . idl-mode)
+ ("\\.js\\'" . java-mode) ; javascript-mode would be better
+ ("\\.x[bp]m\\'" . c-mode)
;; .emacs or .gnus or .viper following a directory delimiter in
;; Unix, MSDOG or VMS syntax.
("[]>:/\\]\\..*\\(emacs\\|gnus\\|viper\\)\\'" . emacs-lisp-mode)
("BROWSE\\'" . ebrowse-tree-mode)
("\\.ebrowse\\'" . ebrowse-tree-mode)
("#\\*mail\\*" . mail-mode)
+ ("\\.g\\'" . antlr-mode)
+ ("\\.ses\\'" . ses-mode)
+ ("\\.\\(soa\\|zone\\)\\'" . dns-mode)
+ ("\\.docbook\\'" . sgml-mode)
+ ("\\.com\\'" . dcl-mode)
+ ("/config\\.\\(?:bat\\|log\\)\\'" . fundamental-mode)
+ ;; Windows candidates may be opened case sensitively on Unix
+ ("\\.\\(?:[iI][nN][iI]\\|[lL][sS][tT]\\|[rR][eE][gG]\\|[sS][yY][sS]\\)\\'" . conf-mode)
+ ("\\.\\(?:desktop\\|la\\)\\'" . conf-unix-mode)
+ ("\\.ppd\\'" . conf-ppd-mode)
+ ("java.+\\.conf\\'" . conf-javaprop-mode)
+ ("\\.properties\\(?:\\.[a-zA-Z0-9._-]+\\)?\\'" . conf-javaprop-mode)
+ ;; *.cf, *.cfg, *.conf, *.config[.local|.de_DE.UTF8|...], */config
+ ("[/.]c\\(?:on\\)?f\\(?:i?g\\)?\\(?:\\.[a-zA-Z0-9._-]+\\)?\\'" . conf-mode)
+ ("\\`/etc/\\(?:DIR_COLORS\\|ethers\\|.?fstab\\|.*hosts\\|lesskey\\|login\\.?de\\(?:fs\\|vperm\\)\\|magic\\|mtab\\|pam\\.d/.*\\|permissions\\(?:\\.d/.+\\)?\\|protocols\\|rpc\\|services\\)\\'" . conf-space-mode)
+ ("\\`/etc/\\(?:acpid?/.+\\|aliases\\(?:\\.d/.+\\)?\\|default/.+\\|group-?\\|hosts\\..+\\|inittab\\|ksysguarddrc\\|opera6rc\\|passwd-?\\|shadow-?\\|sysconfig/.+\\)\\'" . conf-mode)
+ ;; either user's dot-files or under /etc or some such
+ ("/\\.?\\(?:gnokiirc\\|kde.*rc\\|mime\\.types\\|wgetrc\\)\\'" . conf-mode)
+ ;; alas not all ~/.*rc files are like this
+ ("/\\.\\(?:enigma\\|gltron\\|gtk\\|hxplayer\\|net\\|neverball\\|qt/.+\\|realplayer\\|scummvm\\|sversion\\|sylpheed/.+\\|xmp\\)rc\\'" . conf-mode)
+ ("/\\.\\(?:gdbtkinit\\|grip\\|orbital/.+txt\\|rhosts\\|tuxracer/options\\)\\'" . conf-mode)
+ ("/\\.?X\\(?:default\\|resource\\|re\\)s\\>" . conf-xdefaults-mode)
+ ("/X11.+app-defaults/" . conf-xdefaults-mode)
+ ("/X11.+locale/.+/Compose\\'" . conf-colon-mode)
+ ;; this contains everything twice, with space and with colon :-(
+ ("/X11.+locale/compose\\.dir\\'" . conf-javaprop-mode)
;; Get rid of any trailing .n.m and try again.
;; This is for files saved by cvs-merge that look like .#<file>.<rev>
;; or .#<file>.<rev>-<rev> or VC's <file>.~<rev>~.
;; Using mode nil rather than `ignore' would let the search continue
;; through this list (with the shortened name) rather than start over.
- ("\\.~?[0-9]+\\.[0-9][-.0-9]*~?\\'" ignore t)
+ ("\\.~?[0-9]+\\.[0-9][-.0-9]*~?\\'" nil t)
;; The following should come after the ChangeLog pattern
;; for the sake of ChangeLog.1, etc.
;; and after the .scm.[0-9] and CVS' <file>.<rev> patterns too.
("\\.[1-9]\\'" . nroff-mode)
- ("\\.g\\'" . antlr-mode)
- ("\\.ses\\'" . ses-mode)
- ("\\.in\\'" nil t)))
+ ("\\.\\(?:orig\\|in\\|[bB][aA][kK]\\)\\'" nil t)))
"Alist of filename patterns vs corresponding major mode functions.
Each element looks like (REGEXP . FUNCTION) or (REGEXP FUNCTION NON-NIL).
\(NON-NIL stands for anything that is not nil; the value does not matter.)
If the element has the form (REGEXP FUNCTION NON-NIL), then after
calling FUNCTION (if it's not nil), we delete the suffix that matched
-REGEXP and search the list again for another match.")
+REGEXP and search the list again for another match.
+
+If the file name matches `inhibit-first-line-modes-regexps',
+then `auto-mode-alist' is not processed.
+The extensions whose FUNCTION is `archive-mode' should also
+appear in `auto-coding-alist' with `no-conversion' coding system.
+
+See also `interpreter-mode-alist', which detects executable script modes
+based on the interpreters they specify to run,
+and `magic-mode-alist', which determines modes based on file contents.")
(defvar interpreter-mode-alist
+ ;; Note: The entries for the modes defined in cc-mode.el (awk-mode
+ ;; and pike-mode) are added through autoload directives in that
+ ;; file. That way is discouraged since it spreads out the
+ ;; definition of the initial value.
(mapc
(lambda (l)
(cons (purecopy (car l)) (cdr l)))
("wishx" . tcl-mode)
("tcl" . tcl-mode)
("tclsh" . tcl-mode)
- ("awk" . awk-mode)
- ("mawk" . awk-mode)
- ("nawk" . awk-mode)
- ("gawk" . awk-mode)
("scm" . scheme-mode)
("ash" . sh-mode)
("bash" . sh-mode)
("more" . text-mode)
("less" . text-mode)
("pg" . text-mode)
- ("make" . makefile-mode) ; Debian uses this
+ ("make" . makefile-gmake-mode) ; Debian uses this
("guile" . scheme-mode)
("clisp" . lisp-mode)))
"Alist mapping interpreter names to major modes.
-This alist applies to files whose first line starts with `#!'.
+This is used for files whose first lines match `auto-mode-interpreter-regexp'.
Each element looks like (INTERPRETER . MODE).
-The car of each element is compared with
-the name of the interpreter specified in the first line.
-If it matches, mode MODE is selected.")
+If INTERPRETER matches the name of the interpreter specified in the first line
+of a script, mode MODE is enabled.
+
+See also `auto-mode-alist'.")
(defvar inhibit-first-line-modes-regexps '("\\.tar\\'" "\\.tgz\\'")
"List of regexps; if one matches a file name, don't look for `-*-'.")
(defvar auto-mode-interpreter-regexp
"#![ \t]?\\([^ \t\n]*\
/bin/env[ \t]\\)?\\([^ \t\n]+\\)"
- "Regular expression matching interpreters, for file mode determination.
+ "Regexp matching interpreters, for file mode determination.
This regular expression is matched against the first line of a file
-to determine the file's mode in `set-auto-mode' when Emacs can't deduce
-a mode from the file's name. If it matches, the file is assumed to
-be interpreted by the interpreter matched by the second group of the
-regular expression. The mode is then determined as the mode associated
-with that interpreter in `interpreter-mode-alist'.")
-
-(defun set-auto-mode (&optional just-from-file-name)
+to determine the file's mode in `set-auto-mode'. If it matches, the file
+is assumed to be interpreted by the interpreter matched by the second group
+of the regular expression. The mode is then determined as the mode
+associated with that interpreter in `interpreter-mode-alist'.")
+
+(defvar magic-mode-alist
+ `(;; The < comes before the groups (but the first) to reduce backtracking.
+ ;; TODO: UTF-16 <?xml may be preceded by a BOM 0xff 0xfe or 0xfe 0xff.
+ ;; We use [ \t\n] instead of `\\s ' to make regex overflow less likely.
+ (,(let* ((incomment-re "\\(?:[^-]\\|-[^-]\\)")
+ (comment-re (concat "\\(?:!--" incomment-re "*-->[ \t\n]*<\\)")))
+ (concat "\\(?:<\\?xml[ \t\n]+[^>]*>\\)?[ \t\n]*<"
+ comment-re "*"
+ "\\(?:!DOCTYPE[ \t\n]+[^>]*>[ \t\n]*<[ \t\n]*" comment-re "*\\)?"
+ "[Hh][Tt][Mm][Ll]"))
+ . html-mode)
+ ;; These two must come after html, because they are more general:
+ ("<\\?xml " . xml-mode)
+ (,(let* ((incomment-re "\\(?:[^-]\\|-[^-]\\)")
+ (comment-re (concat "\\(?:!--" incomment-re "*-->[ \t\n]*<\\)")))
+ (concat "[ \t\n]*<" comment-re "*!DOCTYPE "))
+ . sgml-mode)
+ ("%![^V]" . ps-mode)
+ ("# xmcd " . conf-unix-mode))
+ "Alist of buffer beginnings vs. corresponding major mode functions.
+Each element looks like (REGEXP . FUNCTION). After visiting a file,
+if REGEXP matches the text at the beginning of the buffer,
+`normal-mode' will call FUNCTION rather than allowing `auto-mode-alist'
+to decide the buffer's major mode.
+
+If FUNCTION is nil, then it is not called. (That is a way of saying
+\"allow `auto-mode-alist' to decide for these files.\")")
+
+(defvar magic-mode-regexp-match-limit 4000
+ "Upper limit on `magic-mode-alist' regexp matches.")
+
+(defun set-auto-mode (&optional keep-mode-if-same)
"Select major mode appropriate for current buffer.
-This checks for a -*- mode tag in the buffer's text,
-compares the filename against the entries in `auto-mode-alist',
-or checks the interpreter that runs this file against
-`interpreter-mode-alist'.
+
+This checks for a -*- mode tag in the buffer's text, checks the
+interpreter that runs this file against `interpreter-mode-alist',
+compares the buffer beginning against `magic-mode-alist', or
+compares the filename against the entries in `auto-mode-alist'.
It does not check for the `mode:' local variable in the
Local Variables section of the file; for that, use `hack-local-variables'.
If `enable-local-variables' is nil, this function does not check for a
-*- mode tag.
-If the optional argument JUST-FROM-FILE-NAME is non-nil,
-then we do not set anything but the major mode,
-and we don't even do that unless it would come from the file name."
+If the optional argument KEEP-MODE-IF-SAME is non-nil, then we
+only set the major mode, if that would change it."
;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*-
- (let (end done modes)
+ (let (end done mode modes)
+ ;; Find a -*- mode tag
(save-excursion
(goto-char (point-min))
(skip-chars-forward " \t\n")
(push (intern (concat (downcase (buffer-substring (point) end))
"-mode"))
modes))))
- ;; If we found modes to use, invoke them now,
- ;; outside the save-excursion.
- (unless just-from-file-name
- (dolist (mode (nreverse modes))
- (if (not (functionp mode))
- (message "Ignoring unknown mode `%s'" mode)
- (setq done t)
- (funcall mode))))
- ;; If we didn't find a mode from a -*- line, try using the file name.
- (if (and (not done) buffer-file-name)
- (let ((name buffer-file-name)
- (keep-going t))
- ;; Remove backup-suffixes from file name.
- (setq name (file-name-sans-versions name))
- (while keep-going
- (setq keep-going nil)
- (let ((alist auto-mode-alist)
- (mode nil))
- ;; Find first matching alist entry.
- (let ((case-fold-search
- (memq system-type '(vax-vms windows-nt cygwin))))
- (while (and (not mode) alist)
- (if (string-match (car (car alist)) name)
- (if (and (consp (cdr (car alist)))
- (nth 2 (car alist)))
- (setq mode (car (cdr (car alist)))
- name (substring name 0 (match-beginning 0))
- keep-going t)
- (setq mode (cdr (car alist))
- keep-going nil)))
- (setq alist (cdr alist))))
- (if mode
- ;; When JUST-FROM-FILE-NAME is set,
- ;; we are working on behalf of set-visited-file-name.
- ;; In that case, if the major mode specified is the
- ;; same one we already have, don't actually reset it.
- ;; We don't want to lose minor modes such as Font Lock.
- (unless (and just-from-file-name (eq mode major-mode))
- (funcall mode))
- ;; If we can't deduce a mode from the file name,
- ;; look for an interpreter specified in the first line.
- ;; As a special case, allow for things like "#!/bin/env perl",
- ;; which finds the interpreter anywhere in $PATH.
- (let ((interpreter
- (save-excursion
- (goto-char (point-min))
- (if (looking-at auto-mode-interpreter-regexp)
- (match-string 2)
- "")))
- elt)
- ;; Map interpreter name to a mode.
- (setq elt (assoc (file-name-nondirectory interpreter)
- interpreter-mode-alist))
- (unless just-from-file-name
- (if elt
- (funcall (cdr elt))))))))))))
-
+ ;; If we found modes to use, invoke them now, outside the save-excursion.
+ (if modes
+ (catch 'nop
+ (dolist (mode (nreverse modes))
+ (if (not (functionp mode))
+ (message "Ignoring unknown mode `%s'" mode)
+ (setq done t)
+ (or (set-auto-mode-0 mode keep-mode-if-same)
+ ;; continuing would call minor modes again, toggling them off
+ (throw 'nop nil))))))
+ (unless done
+ ;; If we didn't, look for an interpreter specified in the first line.
+ ;; As a special case, allow for things like "#!/bin/env perl", which
+ ;; finds the interpreter anywhere in $PATH.
+ (setq mode (save-excursion
+ (goto-char (point-min))
+ (if (looking-at auto-mode-interpreter-regexp)
+ (match-string 2)
+ ""))
+ ;; Map interpreter name to a mode, signalling we're done at the
+ ;; same time.
+ done (assoc (file-name-nondirectory mode)
+ interpreter-mode-alist))
+ ;; If we found an interpreter mode to use, invoke it now.
+ (if done
+ (set-auto-mode-0 (cdr done) keep-mode-if-same)))
+ ;; If we didn't, match the buffer beginning against magic-mode-alist.
+ (unless done
+ (if (setq done (save-excursion
+ (goto-char (point-min))
+ (save-restriction
+ (narrow-to-region (point-min)
+ (min (point-max)
+ (+ (point-min) magic-mode-regexp-match-limit)))
+ (assoc-default nil magic-mode-alist
+ (lambda (re dummy)
+ (looking-at re))))))
+ (set-auto-mode-0 done keep-mode-if-same)
+ ;; Compare the filename against the entries in auto-mode-alist.
+ (if buffer-file-name
+ (let ((name buffer-file-name))
+ ;; Remove backup-suffixes from file name.
+ (setq name (file-name-sans-versions name))
+ (while name
+ ;; Find first matching alist entry.
+ (let ((case-fold-search
+ (memq system-type '(vax-vms windows-nt cygwin))))
+ (if (and (setq mode (assoc-default name auto-mode-alist
+ 'string-match))
+ (consp mode)
+ (cadr mode))
+ (setq mode (car mode)
+ name (substring name 0 (match-beginning 0)))
+ (setq name)))
+ (when mode
+ (set-auto-mode-0 mode keep-mode-if-same)))))))))
+
+;; When `keep-mode-if-same' is set, we are working on behalf of
+;; set-visited-file-name. In that case, if the major mode specified is the
+;; same one we already have, don't actually reset it. We don't want to lose
+;; minor modes such as Font Lock.
+(defun set-auto-mode-0 (mode &optional keep-mode-if-same)
+ "Apply MODE and return it.
+If optional arg KEEP-MODE-IF-SAME is non-nil, MODE is chased of
+any aliases and compared to current major mode. If they are the
+same, do nothing and return nil."
+ (when keep-mode-if-same
+ (while (symbolp (symbol-function mode))
+ (setq mode (symbol-function mode)))
+ (if (eq mode major-mode)
+ (setq mode nil)))
+ (when mode
+ (funcall mode)
+ mode))
(defun set-auto-mode-1 ()
"Find the -*- spec in the buffer.
(setq temp (cdr temp)))
(not temp))
- (search-forward "-*-" (save-excursion
- ;; If the file begins with "#!"
- ;; (exec interpreter magic), look
- ;; for mode frobs in the first two
- ;; lines. You cannot necessarily
- ;; put them in the first line of
- ;; such a file without screwing up
- ;; the interpreter invocation.
- (end-of-line (and (looking-at "^#!") 2))
- (point)) t)
+ (search-forward "-*-" (line-end-position
+ ;; If the file begins with "#!"
+ ;; (exec interpreter magic), look
+ ;; for mode frobs in the first two
+ ;; lines. You cannot necessarily
+ ;; put them in the first line of
+ ;; such a file without screwing up
+ ;; the interpreter invocation.
+ (and (looking-at "^#!") 2)) t)
(progn
(skip-chars-forward " \t")
(setq beg (point))
- (search-forward "-*-"
- (save-excursion (end-of-line) (point))
- t))
+ (search-forward "-*-" (line-end-position) t))
(progn
(forward-char -3)
(skip-chars-backward " \t")
(setq end (point))
(goto-char beg)
end))))
+\f
+;;; Handling file local variables
+
+(defvar ignored-local-variables
+ '(ignored-local-variables safe-local-variable-values)
+ "Variables to be ignored in a file's local variable spec.")
+
+(defvar hack-local-variables-hook nil
+ "Normal hook run after processing a file's local variables specs.
+Major modes can use this to examine user-specified local variables
+in order to initialize other data structure based on them.")
+
+(defcustom safe-local-variable-values nil
+ "List variable-value pairs that are considered safe.
+Each element is a cons cell (VAR . VAL), where VAR is a variable
+symbol and VAL is a value that is considered safe."
+ :group 'find-file
+ :type 'alist)
+
+(defcustom safe-local-eval-forms nil
+ "*Expressions that are considered safe in an `eval:' local variable.
+Add expressions to this list if you want Emacs to evaluate them, when
+they appear in an `eval' local variable specification, without first
+asking you for confirmation."
+ :group 'find-file
+ :version "22.1"
+ :type '(repeat sexp))
+
+;; Risky local variables:
+(mapc (lambda (var) (put var 'risky-local-variable t))
+ '(after-load-alist
+ auto-mode-alist
+ buffer-auto-save-file-name
+ buffer-file-name
+ buffer-file-truename
+ buffer-undo-list
+ dabbrev-case-fold-search
+ dabbrev-case-replace
+ debugger
+ default-text-properties
+ display-time-string
+ enable-local-eval
+ eval
+ exec-directory
+ exec-path
+ file-name-handler-alist
+ font-lock-defaults
+ format-alist
+ frame-title-format
+ global-mode-string
+ header-line-format
+ icon-title-format
+ ignored-local-variables
+ imenu--index-alist
+ imenu-generic-expression
+ inhibit-quit
+ input-method-alist
+ load-path
+ max-lisp-eval-depth
+ max-specpdl-size
+ minor-mode-alist
+ minor-mode-map-alist
+ minor-mode-overriding-map-alist
+ mode-line-buffer-identification
+ mode-line-format
+ mode-line-modes
+ mode-line-modified
+ mode-line-mule-info
+ mode-line-position
+ mode-line-process
+ mode-name
+ outline-level
+ overriding-local-map
+ overriding-terminal-local-map
+ parse-time-rules
+ process-environment
+ rmail-output-file-alist
+ save-some-buffers-action-alist
+ special-display-buffer-names
+ standard-input
+ standard-output
+ unread-command-events
+ vc-mode))
+
+;; Safe local variables:
+;;
+;; For variables defined by major modes, the safety declarations can go into
+;; the major mode's file, since that will be loaded before file variables are
+;; processed.
+;;
+;; For variables defined by minor modes, put the safety declarations in the
+;; file defining the minor mode after the defcustom/defvar using an autoload
+;; cookie, e.g.:
+;;
+;; ;;;###autoload(put 'variable 'safe-local-variable 'stringp)
+;;
+;; Otherwise, when Emacs visits a file specifying that local variable, the
+;; minor mode file may not be loaded yet.
+;;
+;; For variables defined in the C source code the declaration should go here:
+
+;; FIXME: Some variables should be moved according to the rules above.
+(let ((string-or-null (lambda (a) (or (stringp a) (null a)))))
+ (eval
+ `(mapc (lambda (pair)
+ (put (car pair) 'safe-local-variable (cdr pair)))
+ '((byte-compile-dynamic . t)
+ (byte-compile-dynamic-docstrings . t)
+ (byte-compile-warnings . t)
+ (c-basic-offset . integerp)
+ (c-file-style . stringp)
+ (c-indent-level . integerp)
+ (comment-column . integerp)
+ (compile-command . string-or-null-p)
+ (fill-column . integerp)
+ (fill-prefix . string-or-null-p)
+ (indent-tabs-mode . t)
+ (kept-new-versions . integerp)
+ (left-margin . t)
+ (no-byte-compile . t)
+ (no-update-autoloads . t)
+ (outline-regexp . string-or-null-p)
+ (tab-width . integerp) ;; C source code
+ (truncate-lines . t) ;; C source code
+ (version-control . t)))))
+
+(put 'c-set-style 'safe-local-eval-function t)
+
+(defun hack-local-variables-confirm (vars unsafe-vars risky-vars)
+ (if noninteractive
+ nil
+ (let ((name (if buffer-file-name
+ (file-name-nondirectory buffer-file-name)
+ (concat "buffer " (buffer-name))))
+ (offer-save (and (eq enable-local-variables t) unsafe-vars))
+ prompt char)
+ (save-window-excursion
+ (let ((buf (get-buffer-create "*Local Variables*")))
+ (pop-to-buffer buf)
+ (set (make-local-variable 'cursor-type) nil)
+ (erase-buffer)
+ (if unsafe-vars
+ (insert "The local variables list in " name
+ "\ncontains values that may not be safe (*)"
+ (if risky-vars
+ ", and variables that are risky (**)."
+ "."))
+ (if risky-vars
+ (insert "The local variables list in " name
+ "\ncontains variables that are risky (**).")
+ (insert "A local variables list is specified in " name ".")))
+ (insert "\n\nDo you want to apply it? You can type
+y -- to apply the local variables list.
+n -- to ignore the local variables list.")
+ (if offer-save
+ (insert "
+! -- to apply the local variables list, and permanently mark these
+ values (*) as safe (in the future, they will be set automatically.)\n\n")
+ (insert "\n\n"))
+ (dolist (elt vars)
+ (cond ((member elt unsafe-vars)
+ (insert " * "))
+ ((member elt risky-vars)
+ (insert " ** "))
+ (t
+ (insert " ")))
+ (princ (car elt) buf)
+ (insert " : ")
+ (princ (cdr elt) buf)
+ (insert "\n"))
+ (setq prompt
+ (format "Please type %s%s: "
+ (if offer-save "y, n, or !" "y or n")
+ (if (< (line-number-at-pos) (window-body-height))
+ ""
+ ", or C-v to scroll")))
+ (goto-char (point-min))
+ (let ((inhibit-quit t)
+ (cursor-in-echo-area t)
+ (exit-chars
+ (if offer-save '(?! ?y ?n ?\s ?\C-g) '(?y ?n ?\s ?\C-g)))
+ done)
+ (while (not done)
+ (message prompt)
+ (setq char (read-event))
+ (if (numberp char)
+ (if (eq char ?\C-v)
+ (condition-case nil
+ (scroll-up)
+ (error (goto-char (point-min))))
+ (setq done (memq (downcase char) exit-chars)))))
+ (if (= char ?\C-g)
+ (setq quit-flag nil)))
+ (setq char (downcase char))
+ (when (and offer-save (= char ?!) unsafe-vars)
+ (dolist (elt unsafe-vars)
+ (add-to-list 'safe-local-variable-values elt))
+ ;; When this is called from desktop-restore-file-buffer,
+ ;; coding-system-for-read may be non-nil. Reset it before
+ ;; writing to .emacs.
+ (if (or custom-file user-init-file)
+ (let ((coding-system-for-read nil))
+ (customize-save-variable
+ 'safe-local-variable-values
+ safe-local-variable-values))))
+ (kill-buffer buf)
+ (or (= char ?!)
+ (= char ?\s)
+ (= char ?y)))))))
(defun hack-local-variables-prop-line (&optional mode-only)
- "Set local variables specified in the -*- line.
+ "Return local variables specified in the -*- line.
Ignore any specification for `mode:' and `coding:';
`set-auto-mode' should already have handled `mode:',
`set-auto-coding' should already have handled `coding:'.
-If MODE-ONLY is non-nil, all we do is check whether the major mode
-is specified, returning t if it is specified."
+
+If MODE-ONLY is non-nil, all we do is check whether the major
+mode is specified, returning t if it is specified. Otherwise,
+return an alist of elements (VAR . VAL), where VAR is a variable
+and VAL is the specified value."
(save-excursion
(goto-char (point-min))
- (let ((result nil)
- (end (set-auto-mode-1))
- mode-specified
- (enable-local-variables
- (and local-enable-local-variables enable-local-variables)))
+ (let ((end (set-auto-mode-1))
+ result mode-specified)
;; Parse the -*- line into the RESULT alist.
;; Also set MODE-SPECIFIED if we see a spec or `mode'.
(cond ((not end)
;; so we must do that here as well.
;; That is inconsistent, but we're stuck with it.
;; The same can be said for `coding' in set-auto-coding.
- (or (equal (downcase (symbol-name key)) "mode")
+ (or (and (equal (downcase (symbol-name key)) "mode")
+ (setq mode-specified t))
(equal (downcase (symbol-name key)) "coding")
- (setq result (cons (cons key val) result)))
- (if (equal (downcase (symbol-name key)) "mode")
- (setq mode-specified t))
- (skip-chars-forward " \t;")))
- (setq result (nreverse result))))
-
- (if mode-only mode-specified
- (if (and result
- (or mode-only
- (eq enable-local-variables t)
- (and enable-local-variables
- (save-window-excursion
- (condition-case nil
- (switch-to-buffer (current-buffer))
- (error
- ;; If we fail to switch in the selected window,
- ;; it is probably a minibuffer.
- ;; So try another window.
- (condition-case nil
- (switch-to-buffer-other-window (current-buffer))
- (error
- (switch-to-buffer-other-frame (current-buffer))))))
- (y-or-n-p (format "Set local variables as specified in -*- line of %s? "
- (file-name-nondirectory buffer-file-name)))))))
- (let ((enable-local-eval enable-local-eval))
- (while result
- (hack-one-local-variable (car (car result)) (cdr (car result)))
- (setq result (cdr result)))))
- nil))))
-
-(defvar hack-local-variables-hook nil
- "Normal hook run after processing a file's local variables specs.
-Major modes can use this to examine user-specified local variables
-in order to initialize other data structure based on them.")
+ (condition-case nil
+ (push (cons (if (eq key 'eval)
+ 'eval
+ (indirect-variable key))
+ val) result)
+ (error nil)))
+ (skip-chars-forward " \t;")))))
+
+ (if mode-only
+ mode-specified
+ result))))
(defun hack-local-variables (&optional mode-only)
"Parse and put into effect this buffer's local variables spec.
If MODE-ONLY is non-nil, all we do is check whether the major mode
is specified, returning t if it is specified."
- (let ((mode-specified
- ;; If MODE-ONLY is t, we check here for specifying the mode
- ;; in the -*- line. If MODE-ONLY is nil, we process
- ;; the -*- line here.
- (hack-local-variables-prop-line mode-only))
- (enable-local-variables
- (and local-enable-local-variables enable-local-variables)))
- ;; Look for "Local variables:" line in last page.
- (save-excursion
- (goto-char (point-max))
- (search-backward "\n\^L" (max (- (point-max) 3000) (point-min)) 'move)
- (if (let ((case-fold-search t))
- (and (search-forward "Local Variables:" nil t)
- (or (eq enable-local-variables t)
- mode-only
- (and enable-local-variables
- (save-window-excursion
- (switch-to-buffer (current-buffer))
- (save-excursion
- (beginning-of-line)
- (set-window-start (selected-window) (point)))
- (y-or-n-p (format "Set local variables as specified at end of %s? "
- (if buffer-file-name
- (file-name-nondirectory
- buffer-file-name)
- (concat "buffer "
- (buffer-name))))))))))
- (let ((continue t)
- prefix prefixlen suffix beg
- mode-specified
- (enable-local-eval enable-local-eval))
- ;; The prefix is what comes before "local variables:" in its line.
- ;; The suffix is what comes after "local variables:" in its line.
- (skip-chars-forward " \t")
- (or (eolp)
- (setq suffix (buffer-substring (point)
- (progn (end-of-line) (point)))))
- (goto-char (match-beginning 0))
- (or (bolp)
- (setq prefix
- (buffer-substring (point)
- (progn (beginning-of-line) (point)))))
-
- (if prefix (setq prefixlen (length prefix)
- prefix (regexp-quote prefix)))
- (if suffix (setq suffix (concat (regexp-quote suffix) "$")))
- (while continue
- ;; Look at next local variable spec.
- (if selective-display (re-search-forward "[\n\C-m]")
- (forward-line 1))
- ;; Skip the prefix, if any.
- (if prefix
+ (let ((enable-local-variables
+ (and local-enable-local-variables enable-local-variables))
+ result)
+ (when (or mode-only enable-local-variables)
+ (setq result (hack-local-variables-prop-line mode-only))
+ ;; Look for "Local variables:" line in last page.
+ (save-excursion
+ (goto-char (point-max))
+ (search-backward "\n\^L" (max (- (point-max) 3000) (point-min))
+ 'move)
+ (when (let ((case-fold-search t))
+ (search-forward "Local Variables:" nil t))
+ (skip-chars-forward " \t")
+ ;; suffix is what comes after "local variables:" in its line.
+ ;; prefix is what comes before "local variables:" in its line.
+ (let ((suffix
+ (concat
+ (regexp-quote (buffer-substring (point)
+ (line-end-position)))
+ "$"))
+ (prefix
+ (concat "^" (regexp-quote
+ (buffer-substring (line-beginning-position)
+ (match-beginning 0)))))
+ beg)
+
+ (forward-line 1)
+ (let ((startpos (point))
+ endpos
+ (thisbuf (current-buffer)))
+ (save-excursion
+ (unless (let ((case-fold-search t))
+ (re-search-forward
+ (concat prefix "[ \t]*End:[ \t]*" suffix)
+ nil t))
+ (error "Local variables list is not properly terminated"))
+ (beginning-of-line)
+ (setq endpos (point)))
+
+ (with-temp-buffer
+ (insert-buffer-substring thisbuf startpos endpos)
+ (goto-char (point-min))
+ (subst-char-in-region (point) (point-max) ?\^m ?\n)
+ (while (not (eobp))
+ ;; Discard the prefix.
(if (looking-at prefix)
- (forward-char prefixlen)
- (error "Local variables entry is missing the prefix")))
- ;; Find the variable name; strip whitespace.
- (skip-chars-forward " \t")
- (setq beg (point))
- (skip-chars-forward "^:\n")
- (if (eolp) (error "Missing colon in local variables entry"))
- (skip-chars-backward " \t")
- (let* ((str (buffer-substring beg (point)))
- (var (read str))
- val)
- ;; Setting variable named "end" means end of list.
- (if (string-equal (downcase str) "end")
- (setq continue nil)
- ;; Otherwise read the variable value.
- (skip-chars-forward "^:")
- (forward-char 1)
- (setq val (read (current-buffer)))
- (skip-chars-backward "\n")
+ (delete-region (point) (match-end 0))
+ (error "Local variables entry is missing the prefix"))
+ (end-of-line)
+ ;; Discard the suffix.
+ (if (looking-back suffix)
+ (delete-region (match-beginning 0) (point))
+ (error "Local variables entry is missing the suffix"))
+ (forward-line 1))
+ (goto-char (point-min))
+
+ (while (not (eobp))
+ ;; Find the variable name; strip whitespace.
(skip-chars-forward " \t")
- (or (if suffix (looking-at suffix) (eolp))
- (error "Local variables entry is terminated incorrectly"))
- (if mode-only
- (if (eq var 'mode)
- (setq mode-specified t))
- ;; Set the variable. "Variables" mode and eval are funny.
- (hack-one-local-variable var val))))))))
- (unless mode-only
- (run-hooks 'hack-local-variables-hook))
- mode-specified))
-
-(defvar ignored-local-variables
- '(enable-local-eval)
- "Variables to be ignored in a file's local variable spec.")
-
-;; Get confirmation before setting these variables as locals in a file.
-(put 'debugger 'risky-local-variable t)
-(put 'enable-local-eval 'risky-local-variable t)
-(put 'ignored-local-variables 'risky-local-variable t)
-(put 'eval 'risky-local-variable t)
-(put 'file-name-handler-alist 'risky-local-variable t)
-(put 'inhibit-quit 'risky-local-variable t)
-(put 'minor-mode-alist 'risky-local-variable t)
-(put 'minor-mode-map-alist 'risky-local-variable t)
-(put 'minor-mode-overriding-map-alist 'risky-local-variable t)
-(put 'overriding-local-map 'risky-local-variable t)
-(put 'overriding-terminal-local-map 'risky-local-variable t)
-(put 'auto-mode-alist 'risky-local-variable t)
-(put 'after-load-alist 'risky-local-variable t)
-(put 'buffer-file-name 'risky-local-variable t)
-(put 'buffer-undo-list 'risky-local-variable t)
-(put 'buffer-auto-save-file-name 'risky-local-variable t)
-(put 'buffer-file-truename 'risky-local-variable t)
-(put 'default-text-properties 'risky-local-variable t)
-(put 'exec-path 'risky-local-variable t)
-(put 'load-path 'risky-local-variable t)
-(put 'exec-directory 'risky-local-variable t)
-(put 'process-environment 'risky-local-variable t)
-(put 'dabbrev-case-fold-search 'risky-local-variable t)
-(put 'dabbrev-case-replace 'risky-local-variable t)
-;; Don't wait for outline.el to be loaded, for the sake of outline-minor-mode.
-(put 'outline-level 'risky-local-variable t)
-(put 'rmail-output-file-alist 'risky-local-variable t)
-(put 'font-lock-defaults 'risky-local-variable t)
-(put 'special-display-buffer-names 'risky-local-variable t)
-(put 'frame-title-format 'risky-local-variable t)
-(put 'global-mode-string 'risky-local-variable t)
-(put 'header-line-format 'risky-local-variable t)
-(put 'icon-title-format 'risky-local-variable t)
-(put 'input-method-alist 'risky-local-variable t)
-(put 'format-alist 'risky-local-variable t)
-(put 'vc-mode 'risky-local-variable t)
-(put 'imenu-generic-expression 'risky-local-variable t)
-(put 'imenu-index-alist 'risky-local-variable t)
-(put 'standard-input 'risky-local-variable t)
-(put 'standard-output 'risky-local-variable t)
-(put 'unread-command-events 'risky-local-variable t)
-(put 'max-lisp-eval-depth 'risky-local-variable t)
-(put 'max-specpdl-size 'risky-local-variable t)
-(put 'mode-line-format 'risky-local-variable t)
-(put 'mode-line-modified 'risky-local-variable t)
-(put 'mode-line-mule-info 'risky-local-variable t)
-(put 'mode-line-buffer-identification 'risky-local-variable t)
-(put 'mode-line-modes 'risky-local-variable t)
-(put 'mode-line-position 'risky-local-variable t)
-(put 'mode-line-process 'risky-local-variable t)
-(put 'mode-name 'risky-local-variable t)
-(put 'display-time-string 'risky-local-variable t)
-(put 'parse-time-rules 'risky-local-variable t)
-
-;; This case is safe because the user gets to check it before it is used.
-(put 'compile-command 'safe-local-variable 'stringp)
-
-(defun risky-local-variable-p (sym val)
- "Non-nil if SYM could be dangerous as a file-local variable with value VAL.
-If VAL is nil, the question is whether any value might be dangerous."
- (let ((safep (get sym 'safe-local-variable)))
- (or (memq sym ignored-local-variables)
- (get sym 'risky-local-variable)
- (and (string-match "-hooks?$\\|-functions?$\\|-forms?$\\|-program$\\|-command$\\|-predicate$\\|font-lock-keywords$\\|font-lock-keywords-[0-9]+$\\|font-lock-syntactic-keywords$\\|-frame-alist$\\|-mode-alist$\\|-map$\\|-map-alist$"
- (symbol-name sym))
- (not safep))
- ;; If the safe-local-variable property isn't t or nil,
- ;; then it must return non-nil on the proposed value to be safe.
- (and (not (memq safep '(t nil)))
- (or (null val)
- (not (funcall safep val)))))))
-
-(defcustom safe-local-eval-forms nil
- "*Expressions that are considered \"safe\" in an `eval:' local variable.
-Add expressions to this list if you want Emacs to evaluate them, when
-they appear in an `eval' local variable specification, without first
-asking you for confirmation."
- :group 'find-file
- :version "21.4"
- :type '(repeat sexp))
-
-(put 'c-set-style 'safe-local-eval-function t)
+ (setq beg (point))
+ (skip-chars-forward "^:\n")
+ (if (eolp) (error "Missing colon in local variables entry"))
+ (skip-chars-backward " \t")
+ (let* ((str (buffer-substring beg (point)))
+ (var (read str))
+ val)
+ ;; Read the variable value.
+ (skip-chars-forward "^:")
+ (forward-char 1)
+ (setq val (read (current-buffer)))
+ (if mode-only
+ (if (eq var 'mode)
+ (setq result t))
+ (unless (eq var 'coding)
+ (condition-case nil
+ (push (cons (if (eq var 'eval)
+ 'eval
+ (indirect-variable var))
+ val) result)
+ (error nil)))))
+ (forward-line 1)))))))
+
+ ;; We've read all the local variables. Now, return whether the
+ ;; mode is specified (if MODE-ONLY is non-nil), or set the
+ ;; variables (if MODE-ONLY is nil.)
+ (if mode-only
+ result
+ (dolist (ignored ignored-local-variables)
+ (setq result (assq-delete-all ignored result)))
+ (if (null enable-local-eval)
+ (setq result (assq-delete-all 'eval result)))
+ (when result
+ (setq result (nreverse result))
+ ;; Find those variables that we may want to save to
+ ;; `safe-local-variable-values'.
+ (let (risky-vars unsafe-vars)
+ (dolist (elt result)
+ (let ((var (car elt))
+ (val (cdr elt)))
+ (or (eq var 'mode)
+ (and (eq var 'eval)
+ (or (eq enable-local-eval t)
+ (hack-one-local-variable-eval-safep
+ (eval (quote val)))))
+ (safe-local-variable-p var val)
+ (and (risky-local-variable-p var val)
+ (push elt risky-vars))
+ (push elt unsafe-vars))))
+ (if (or (and (eq enable-local-variables t)
+ (null unsafe-vars)
+ (null risky-vars))
+ (hack-local-variables-confirm
+ result unsafe-vars risky-vars))
+ (dolist (elt result)
+ (hack-one-local-variable (car elt) (cdr elt)))))
+ (run-hooks 'hack-local-variables-hook))))))
+
+(defun safe-local-variable-p (sym val)
+ "Non-nil if SYM is safe as a file-local variable with value VAL.
+It is safe if any of these conditions are met:
+
+ * There is a matching entry (SYM . VAL) in the
+ `safe-local-variable-values' user option.
+
+ * The `safe-local-variable' property of SYM is t.
+
+ * The `safe-local-variable' property of SYM is a function that
+ evaluates to a non-nil value with VAL as an argument."
+ (or (member (cons sym val) safe-local-variable-values)
+ (let ((safep (get sym 'safe-local-variable)))
+ (or (eq safep t)
+ (and (functionp safep)
+ (funcall safep val))))))
+
+(defun risky-local-variable-p (sym &optional ignored)
+ "Non-nil if SYM could be dangerous as a file-local variable.
+It is dangerous if either of these conditions are met:
+
+ * Its `risky-local-variable' property is non-nil.
+
+ * Its name ends with \"hook(s)\", \"function(s)\", \"form(s)\", \"map\",
+ \"program\", \"command(s)\", \"predicate(s)\", \"frame-alist\",
+ \"mode-alist\", \"font-lock-(syntactic-)keyword*\", or
+ \"map-alist\"."
+ ;; If this is an alias, check the base name.
+ (condition-case nil
+ (setq sym (indirect-variable sym))
+ (error nil))
+ (or (get sym 'risky-local-variable)
+ (string-match "-hooks?$\\|-functions?$\\|-forms?$\\|-program$\\|\
+-commands?$\\|-predicates?$\\|font-lock-keywords$\\|font-lock-keywords\
+-[0-9]+$\\|font-lock-syntactic-keywords$\\|-frame-alist$\\|-mode-alist$\\|\
+-map$\\|-map-alist$" (symbol-name sym))))
(defun hack-one-local-variable-quotep (exp)
(and (consp exp) (eq (car exp) 'quote) (consp (cdr exp))))
ok)))))))
(defun hack-one-local-variable (var val)
- "\"Set\" one variable in a local variables spec.
-A few patterns are specified so that any name which matches one
-is considered risky."
+ "Set local variable VAR with value VAL."
(cond ((eq var 'mode)
(funcall (intern (concat (downcase (symbol-name val))
"-mode"))))
- ((eq var 'coding)
- ;; We have already handled coding: tag in set-auto-coding.
- nil)
- ;; "Setting" eval means either eval it or do nothing.
- ;; Likewise for setting hook variables.
- ((risky-local-variable-p var val)
- ;; Permit evalling a put of a harmless property.
- ;; if the args do nothing tricky.
- (if (or (and (eq var 'eval)
- (hack-one-local-variable-eval-safep val))
- ;; Permit eval if not root and user says ok.
- (and (not (zerop (user-uid)))
- (or (eq enable-local-eval t)
- (and enable-local-eval
- (save-window-excursion
- (switch-to-buffer (current-buffer))
- (save-excursion
- (beginning-of-line)
- (set-window-start (selected-window) (point)))
- (setq enable-local-eval
- (y-or-n-p (format "Process `eval' or hook local variables in %s? "
- (if buffer-file-name
- (concat "file " (file-name-nondirectory buffer-file-name))
- (concat "buffer " (buffer-name)))))))))))
- (if (eq var 'eval)
- (save-excursion (eval val))
- (make-local-variable var)
- (set var val))
- (message "Ignoring risky spec in the local variables list")))
- ;; Ordinary variable, really set it.
+ ((eq var 'eval)
+ (save-excursion (eval val)))
(t (make-local-variable var)
;; Make sure the string has no text properties.
;; Some text properties can get evaluated in various ways,
(defun set-visited-file-name (filename &optional no-query along-with-file)
"Change name of file visited in current buffer to FILENAME.
+This also renames the buffer to correspond to the new file.
The next time the buffer is saved it will go in the newly specified file.
-nil or empty string as argument means make buffer not be visiting any file.
+FILENAME nil or an empty string means mark buffer as not visiting any file.
Remember to delete the initial contents of the minibuffer
if you wish to pass an empty string as the argument.
(setq truename (file-truename filename))
(if find-file-visit-truename
(setq filename truename))))
+ (if filename
+ (let ((new-name (file-name-nondirectory filename)))
+ (if (string= new-name "")
+ (error "Empty file name"))))
(let ((buffer (and filename (find-buffer-visiting filename))))
(and buffer (not (eq buffer (current-buffer)))
(not no-query)
(setq buffer-file-name filename)
(if filename ; make buffer name reflect filename.
(let ((new-name (file-name-nondirectory buffer-file-name)))
- (if (string= new-name "")
- (error "Empty file name"))
(if (eq system-type 'vax-vms)
(setq new-name (downcase new-name)))
(setq default-directory (file-name-directory buffer-file-name))
+ ;; If new-name == old-name, renaming would add a spurious <2>
+ ;; and it's considered as a feature in rename-buffer.
(or (string= new-name (buffer-name))
(rename-buffer new-name t))))
(setq buffer-backed-up nil)
(progn
(setq buffer-file-truename (abbreviate-file-name truename))
(if find-file-visit-truename
- (setq buffer-file-name buffer-file-truename))))
+ (setq buffer-file-name truename))))
(setq buffer-file-number
(if filename
(nthcdr 10 (file-attributes buffer-file-name))
If you specify just a directory name as FILENAME, that means to use
the default file name but in that directory. You can also yank
-the default file name into the minibuffer to edit it, using M-n.
+the default file name into the minibuffer to edit it, using \\<minibuffer-local-map>\\[next-history-element].
If the buffer is not already visiting a file, the default file name
for the output file is the buffer name.
(and buffer-file-name
(file-writable-p buffer-file-name)
(setq buffer-read-only nil))
- (save-buffer))
+ (save-buffer)
+ ;; It's likely that the VC status at the new location is different from
+ ;; the one at the old location.
+ (vc-find-file-hook))
\f
(defun backup-buffer ()
"Make a backup of the disk file visited by the current buffer, if appropriate.
backup-by-copying
;; Don't rename a suid or sgid file.
(and modes (< 0 (logand modes #o6000)))
+ (not (file-writable-p (file-name-directory real-file-name)))
(and backup-by-copying-when-linked
(> (file-nlinks real-file-name) 1))
(and (or backup-by-copying-when-mismatch
(file-error nil))))))
(defun backup-buffer-copy (from-name to-name modes)
- (condition-case ()
- (copy-file from-name to-name t t)
- (file-error
- ;; If copying fails because file TO-NAME
- ;; is not writable, delete that file and try again.
- (if (and (file-exists-p to-name)
- (not (file-writable-p to-name)))
- (delete-file to-name))
- (copy-file from-name to-name t t)))
- (set-file-modes to-name (logand modes #o1777)))
+ (let ((umask (default-file-modes)))
+ (unwind-protect
+ (progn
+ ;; Create temp files with strict access rights. It's easy to
+ ;; loosen them later, whereas it's impossible to close the
+ ;; time-window of loose permissions otherwise.
+ (set-default-file-modes ?\700)
+ (while (condition-case ()
+ (progn
+ (condition-case nil
+ (delete-file to-name)
+ (file-error nil))
+ (copy-file from-name to-name t t 'excl)
+ nil)
+ (file-already-exists t))
+ ;; The file was somehow created by someone else between
+ ;; `delete-file' and `copy-file', so let's try again.
+ nil))
+ ;; Reset the umask.
+ (set-default-file-modes umask)))
+ (and modes
+ (set-file-modes to-name (logand modes #o1777))))
(defun file-name-sans-versions (name &optional keep-backup-version)
"Return file NAME sans backup versions or strings.
(defcustom make-backup-file-name-function nil
"A function to use instead of the default `make-backup-file-name'.
-A value of nil gives the default `make-backup-file-name' behaviour.
+A value of nil gives the default `make-backup-file-name' behavior.
This could be buffer-local to do something special for specific
files. If you define it, you may need to change `backup-file-name-p'
(defun normal-backup-enable-predicate (name)
"Default `backup-enable-predicate' function.
-Checks for files in `temporary-file-directory' or
-`small-temporary-file-directory'."
+Checks for files in `temporary-file-directory',
+`small-temporary-file-directory', and /tmp."
(not (or (let ((comp (compare-strings temporary-file-directory 0 nil
name 0 nil)))
;; Directory is under temporary-file-directory.
(and (not (eq comp t))
(< comp (- (length temporary-file-directory)))))
+ (let ((comp (compare-strings "/tmp" 0 nil
+ name 0 nil)))
+ ;; Directory is under /tmp.
+ (and (not (eq comp t))
+ (< comp (- (length "/tmp")))))
(if small-temporary-file-directory
(let ((comp (compare-strings small-temporary-file-directory
0 nil
(defun make-backup-file-name-1 (file)
"Subroutine of `make-backup-file-name' and `find-backup-file-name'."
(let ((alist backup-directory-alist)
- elt backup-directory failed)
+ elt backup-directory)
(while alist
(setq elt (pop alist))
(if (string-match (car elt) file)
the index in the name where the version number begins."
(if (and (string-match "[0-9]+~$" fn backup-extract-version-start)
(= (match-beginning 0) backup-extract-version-start))
- (string-to-int (substring fn backup-extract-version-start -1))
+ (string-to-number (substring fn backup-extract-version-start -1))
0))
;; I believe there is no need to alter this behavior for VMS;
This function returns a relative file name which is equivalent to FILENAME
when used with that default directory as the default.
If FILENAME and DIRECTORY lie on different machines or on different drives
-on a DOS/Windows machine, it returns FILENAME on expanded form."
+on a DOS/Windows machine, it returns FILENAME in expanded form."
(save-match-data
(setq directory
(file-name-as-directory (expand-file-name (or directory
default-directory))))
(setq filename (expand-file-name filename))
- (let ((hf (find-file-name-handler filename 'file-local-copy))
- (hd (find-file-name-handler directory 'file-local-copy)))
- (when (and hf (not (get hf 'file-remote-p))) (setq hf nil))
- (when (and hd (not (get hd 'file-remote-p))) (setq hd nil))
+ (let ((fremote (file-remote-p filename))
+ (dremote (file-remote-p directory)))
(if ;; Conditions for separate trees
(or
;; Test for different drives on DOS/Windows
(and
+ ;; Should `cygwin' really be included here? --stef
(memq system-type '(ms-dos cygwin windows-nt))
- (not (string-equal (substring filename 0 2)
- (substring directory 0 2))))
- ;; Test for different remote file handlers
- (not (eq hf hd))
+ (not (eq t (compare-strings filename 0 2 directory 0 2))))
;; Test for different remote file system identification
- (and
- hf
- (let ((re (car (rassq hf file-name-handler-alist))))
- (not
- (equal
- (and
- (string-match re filename)
- (substring filename 0 (match-end 0)))
- (and
- (string-match re directory)
- (substring directory 0 (match-end 0))))))))
+ (not (equal fremote dremote)))
filename
- (unless (eq (aref filename 0) ?/)
- (setq filename (concat "/" filename)))
- (unless (eq (aref directory 0) ?/)
- (setq directory (concat "/" directory)))
(let ((ancestor ".")
(filename-dir (file-name-as-directory filename)))
- (while
- (and
- (not (string-match (concat "^" (regexp-quote directory))
- filename-dir))
- (not (string-match (concat "^" (regexp-quote directory))
- filename)))
+ (while (not
+ (or
+ (eq t (compare-strings filename-dir nil (length directory)
+ directory nil nil case-fold-search))
+ (eq t (compare-strings filename nil (length directory)
+ directory nil nil case-fold-search))))
(setq directory (file-name-directory (substring directory 0 -1))
ancestor (if (equal ancestor ".")
".."
(concat "../" ancestor))))
;; Now ancestor is empty, or .., or ../.., etc.
- (if (string-match (concat "^" (regexp-quote directory)) filename)
+ (if (eq t (compare-strings filename nil (length directory)
+ directory nil nil case-fold-search))
;; We matched within FILENAME's directory part.
;; Add the rest of FILENAME onto ANCESTOR.
- (let ((rest (substring filename (match-end 0))))
+ (let ((rest (substring filename (length directory))))
(if (and (equal ancestor ".") (not (equal rest "")))
;; But don't bother with ANCESTOR if it would give us `./'.
rest
ancestor))))))
\f
(defun save-buffer (&optional args)
- "Save current buffer in visited file if modified. Versions described below.
+ "Save current buffer in visited file if modified.
+Variations are described below.
+
By default, makes the previous version into a backup file
if previously requested or if this is the first save.
-With 1 \\[universal-argument], marks this version
+Prefixed with one \\[universal-argument], marks this version
to become a backup when the next save is done.
-With 2 \\[universal-argument]'s,
+Prefixed with two \\[universal-argument]'s,
unconditionally makes the previous version into a backup file.
-With 3 \\[universal-argument]'s, marks this version
+Prefixed with three \\[universal-argument]'s, marks this version
to become a backup when the next save is done,
and unconditionally makes the previous version into a backup file.
-With argument of 0, never make the previous version into a backup file.
+With a numeric argument of 0, never make the previous version
+into a backup file.
If a file's name is FOO, the names of its numbered backup versions are
FOO.~i~ for various integers i. A non-numbered backup file is called FOO~.
(defvar auto-save-hook nil
"Normal hook run just before auto-saving.")
+(defcustom before-save-hook nil
+ "Normal hook that is run before a buffer is saved to its file."
+ :options '(copyright-update time-stamp)
+ :type 'hook
+ :group 'files)
+
(defcustom after-save-hook nil
"Normal hook that is run after a buffer is saved to its file."
:options '(executable-make-buffer-file-executable-if-script-p)
"Save the current buffer in its visited file, if it has been modified.
The hooks `write-contents-functions' and `write-file-functions' get a chance
to do the job of saving; if they do not, then the buffer is saved in
-the visited file file in the usual way.
-After saving the buffer, this function runs `after-save-hook'."
+the visited file in the usual way.
+Before and after saving the buffer, this function runs
+`before-save-hook' and `after-save-hook', respectively."
(interactive)
(save-current-buffer
;; In an indirect buffer, save its base buffer instead.
(set-buffer (buffer-base-buffer)))
(if (buffer-modified-p)
(let ((recent-save (recent-auto-save-p))
- setmodes tempsetmodes)
+ setmodes)
;; On VMS, rename file and buffer to get rid of version number.
(if (and (eq system-type 'vax-vms)
(not (string= buffer-file-name
(not (and (eq selective-display t)
(= (char-after (1- (point-max))) ?\r)))
(or (eq require-final-newline t)
+ (eq require-final-newline 'visit-save)
(and require-final-newline
(y-or-n-p
(format "Buffer %s does not end in newline. Add one? "
(insert ?\n))))
;; Support VC version backups.
(vc-before-save)
+ (run-hooks 'before-save-hook)
(or (run-hook-with-args-until-success 'write-contents-functions)
(run-hook-with-args-until-success 'local-write-file-hooks)
(run-hook-with-args-until-success 'write-file-functions)
;; but inhibited if one of write-file-functions returns non-nil.
;; It returns a value (MODES . BACKUPNAME), like backup-buffer.
(defun basic-save-buffer-1 ()
- (if save-buffer-coding-system
- (let ((coding-system-for-write save-buffer-coding-system))
+ (prog1
+ (if save-buffer-coding-system
+ (let ((coding-system-for-write save-buffer-coding-system))
+ (basic-save-buffer-2))
(basic-save-buffer-2))
- (basic-save-buffer-2)))
+ (setq buffer-file-coding-system-explicit last-coding-system-used)))
;; This returns a value (MODES . BACKUPNAME), like backup-buffer.
(defun basic-save-buffer-2 ()
;; This requires write access to the containing dir,
;; which is why we don't try it if we don't have that access.
(let ((realname buffer-file-name)
- tempname temp nogood i succeed
+ tempname succeed
+ (umask (default-file-modes))
(old-modtime (visited-file-modtime)))
- (setq i 0)
- (setq nogood t)
- ;; Find the temporary name to write under.
- (while nogood
- (setq tempname (format
- (if (and (eq system-type 'ms-dos)
- (not (msdos-long-file-names)))
- "%s#%d.tm#" ; MSDOS limits files to 8+3
- (if (memq system-type '(vax-vms axp-vms))
- "%s$tmp$%d"
- "%s#tmp#%d"))
- dir i))
- (setq nogood (file-exists-p tempname))
- (setq i (1+ i)))
+ ;; Create temp files with strict access rights. It's easy to
+ ;; loosen them later, whereas it's impossible to close the
+ ;; time-window of loose permissions otherwise.
(unwind-protect
- (progn (clear-visited-file-modtime)
- (write-region (point-min) (point-max)
- tempname nil realname
- buffer-file-truename)
- (setq succeed t))
- ;; If writing the temp file fails,
- ;; delete the temp file.
- (or succeed
- (progn
- (condition-case nil
- (delete-file tempname)
- (file-error nil))
- (set-visited-file-modtime old-modtime))))
- ;; Since we have created an entirely new file
- ;; and renamed it, make sure it gets the
- ;; right permission bits set.
+ (progn
+ (clear-visited-file-modtime)
+ (set-default-file-modes ?\700)
+ ;; Try various temporary names.
+ ;; This code follows the example of make-temp-file,
+ ;; but it calls write-region in the appropriate way
+ ;; for saving the buffer.
+ (while (condition-case ()
+ (progn
+ (setq tempname
+ (make-temp-name
+ (expand-file-name "tmp" dir)))
+ (write-region (point-min) (point-max)
+ tempname nil realname
+ buffer-file-truename 'excl)
+ nil)
+ (file-already-exists t))
+ ;; The file was somehow created by someone else between
+ ;; `make-temp-name' and `write-region', let's try again.
+ nil)
+ (setq succeed t))
+ ;; Reset the umask.
+ (set-default-file-modes umask)
+ ;; If we failed, restore the buffer's modtime.
+ (unless succeed
+ (set-visited-file-modtime old-modtime)))
+ ;; Since we have created an entirely new file,
+ ;; make sure it gets the right permission bits set.
(setq setmodes (or setmodes (cons (file-modes buffer-file-name)
buffer-file-name)))
;; We succeeded in writing the temp file,
;; If we get an error writing the new file, and we made
;; the backup by renaming, undo the backing-up.
(and setmodes (not success)
- (rename-file (cdr setmodes) buffer-file-name))))))
+ (progn
+ (rename-file (cdr setmodes) buffer-file-name t)
+ (setq buffer-backed-up nil)))))))
setmodes))
(defun diff-buffer-with-file (&optional buffer)
(recursive-edit)
;; Return nil to ask about BUF again.
nil)
- "display the current buffer")
+ "view this file")
(?d diff-buffer-with-file
- "show difference to last saved version"))
+ "view changes in file"))
"ACTION-ALIST argument used in call to `map-y-or-n-p'.")
-(put 'save-some-buffers-action-alist 'risky-local-variable t)
+
+(defvar buffer-save-without-query nil
+ "Non-nil means `save-some-buffers' should save this buffer without asking.")
+(make-variable-buffer-local 'buffer-save-without-query)
(defun save-some-buffers (&optional arg pred)
"Save some modified file-visiting buffers. Asks user about each one.
You can answer `y' to save, `n' not to save, `C-r' to look at the
buffer in question with `view-buffer' before deciding or `d' to
-view the differences using `diff-buffer-to-file'.
+view the differences using `diff-buffer-with-file'.
Optional argument (the prefix) non-nil means save all with no questions.
Optional second argument PRED determines which buffers are considered:
change the additional actions you can take on files."
(interactive "P")
(save-window-excursion
- (let* ((queried nil)
- (files-done
+ (let* (queried some-automatic
+ files-done abbrevs-done)
+ (dolist (buffer (buffer-list))
+ ;; First save any buffers that we're supposed to save unconditionally.
+ ;; That way the following code won't ask about them.
+ (with-current-buffer buffer
+ (when (and buffer-save-without-query (buffer-modified-p))
+ (setq some-automatic t)
+ (save-buffer))))
+ ;; Ask about those buffers that merit it,
+ ;; and record the number thus saved.
+ (setq files-done
(map-y-or-n-p
(function
(lambda (buffer)
(buffer-list)
'("buffer" "buffers" "save")
save-some-buffers-action-alist))
- (abbrevs-done
- (and save-abbrevs abbrevs-changed
- (progn
- (if (or arg
- (eq save-abbrevs 'silently)
- (y-or-n-p (format "Save abbrevs in %s? "
- abbrev-file-name)))
- (write-abbrev-file nil))
- ;; Don't keep bothering user if he says no.
- (setq abbrevs-changed nil)
- t))))
+ ;; Maybe to save abbrevs, and record whether
+ ;; we either saved them or asked to.
+ (and save-abbrevs abbrevs-changed
+ (progn
+ (if (or arg
+ (eq save-abbrevs 'silently)
+ (y-or-n-p (format "Save abbrevs in %s? "
+ abbrev-file-name)))
+ (write-abbrev-file nil))
+ ;; Don't keep bothering user if he says no.
+ (setq abbrevs-changed nil)
+ (setq abbrevs-done t)))
(or queried (> files-done 0) abbrevs-done
- (message "(No files need saving)")))))
+ (message (if some-automatic
+ "(Some special files were saved without asking)"
+ "(No files need saving)"))))))
\f
(defun not-modified (&optional arg)
"Mark current buffer as unmodified, not needing to be saved.
(make-local-variable 'view-read-only)
(setq view-read-only t)) ; Must leave view mode.
((and (not buffer-read-only) view-read-only
+ ;; If view-mode is already active, `view-mode-enter' is a nop.
+ (not view-mode)
(not (eq (get major-mode 'mode-class) 'special)))
(view-mode-enter))
(t (setq buffer-read-only (not buffer-read-only))
(force-mode-line-update)))
(if (vc-backend buffer-file-name)
- (message (substitute-command-keys
+ (message "%s" (substitute-command-keys
(concat "File is under version-control; "
"use \\[vc-next-action] to check in/out"))))))
;; ordinary or numeric backups. It might create a directory for
;; backups as a side-effect, according to `backup-directory-alist'.
(let* ((filename (file-name-sans-versions
- (make-backup-file-name filename)))
+ (make-backup-file-name (expand-file-name filename))))
(file (file-name-nondirectory filename))
(dir (file-name-directory filename))
(comp (file-name-all-completions file dir))
That is useful when you have visited a file in a nonexistent directory.
Noninteractively, the second (optional) argument PARENTS says whether
-to create parent directories if they don't exist."
+to create parent directories if they don't exist. Interactively,
+this happens by default."
(interactive
(list (read-file-name "Make directory: " default-directory default-directory
nil nil)
The function you specify is responsible for updating (or preserving) point.")
+(defvar buffer-stale-function nil
+ "Function to check whether a non-file buffer needs reverting.
+This should be a function with one optional argument NOCONFIRM.
+Auto Revert Mode passes t for NOCONFIRM. The function should return
+non-nil if the buffer should be reverted. A return value of
+`fast' means that the need for reverting was not checked, but
+that reverting the buffer is fast. The buffer is current when
+this function is called.
+
+The idea behind the NOCONFIRM argument is that it should be
+non-nil if the buffer is going to be reverted without asking the
+user. In such situations, one has to be careful with potentially
+time consuming operations.
+
+For more information on how this variable is used by Auto Revert mode,
+see Info node `(emacs-xtra)Supporting additional buffers'.")
+
(defvar before-revert-hook nil
"Normal hook for `revert-buffer' to run before reverting.
If `revert-buffer-function' is used to override the normal revert
This command also works for special buffers that contain text which
doesn't come from a file, but reflects some other data base instead:
-for example, Dired buffers and buffer-list buffers. In these cases,
+for example, Dired buffers and `buffer-list' buffers. In these cases,
it reconstructs the buffer contents from the appropriate data base.
When called from Lisp, the first argument is IGNORE-AUTO; only offer
to nil.
Optional second argument NOCONFIRM means don't ask for confirmation at
-all. (The local variable `revert-without-query', if non-nil, prevents
-confirmation.)
+all. \(The variable `revert-without-query' offers another way to
+revert buffers without querying for confirmation.)
Optional third argument PRESERVE-MODES non-nil means don't alter
the files modes. Normally we reinitialize them using `normal-mode'.
(interactive (list (not current-prefix-arg)))
(if revert-buffer-function
(funcall revert-buffer-function ignore-auto noconfirm)
- (let* ((auto-save-p (and (not ignore-auto)
- (recent-auto-save-p)
- buffer-auto-save-file-name
- (file-readable-p buffer-auto-save-file-name)
- (y-or-n-p
- "Buffer has been auto-saved recently. Revert from auto-save file? ")))
- (file-name (if auto-save-p
- buffer-auto-save-file-name
- buffer-file-name)))
- (cond ((null file-name)
- (error "Buffer does not seem to be associated with any file"))
- ((or noconfirm
- (and (not (buffer-modified-p))
- (let ((tail revert-without-query)
- (found nil))
- (while tail
- (if (string-match (car tail) file-name)
- (setq found t))
- (setq tail (cdr tail)))
- found))
- (yes-or-no-p (format "Revert buffer from file %s? "
- file-name)))
- (run-hooks 'before-revert-hook)
- ;; If file was backed up but has changed since,
- ;; we shd make another backup.
- (and (not auto-save-p)
- (not (verify-visited-file-modtime (current-buffer)))
- (setq buffer-backed-up nil))
- ;; Get rid of all undo records for this buffer.
- (or (eq buffer-undo-list t)
- (setq buffer-undo-list nil))
- ;; Effectively copy the after-revert-hook status,
- ;; since after-find-file will clobber it.
- (let ((global-hook (default-value 'after-revert-hook))
- (local-hook-p (local-variable-p 'after-revert-hook))
- (local-hook (and (local-variable-p 'after-revert-hook)
- after-revert-hook)))
- (let (buffer-read-only
- ;; Don't make undo records for the reversion.
- (buffer-undo-list t))
- (if revert-buffer-insert-file-contents-function
+ (with-current-buffer (or (buffer-base-buffer (current-buffer))
+ (current-buffer))
+ (let* ((auto-save-p (and (not ignore-auto)
+ (recent-auto-save-p)
+ buffer-auto-save-file-name
+ (file-readable-p buffer-auto-save-file-name)
+ (y-or-n-p
+ "Buffer has been auto-saved recently. Revert from auto-save file? ")))
+ (file-name (if auto-save-p
+ buffer-auto-save-file-name
+ buffer-file-name)))
+ (cond ((null file-name)
+ (error "Buffer does not seem to be associated with any file"))
+ ((or noconfirm
+ (and (not (buffer-modified-p))
+ (catch 'found
+ (dolist (regexp revert-without-query)
+ (when (string-match regexp file-name)
+ (throw 'found t)))))
+ (yes-or-no-p (format "Revert buffer from file %s? "
+ file-name)))
+ (run-hooks 'before-revert-hook)
+ ;; If file was backed up but has changed since,
+ ;; we shd make another backup.
+ (and (not auto-save-p)
+ (not (verify-visited-file-modtime (current-buffer)))
+ (setq buffer-backed-up nil))
+ ;; Effectively copy the after-revert-hook status,
+ ;; since after-find-file will clobber it.
+ (let ((global-hook (default-value 'after-revert-hook))
+ (local-hook (when (local-variable-p 'after-revert-hook)
+ after-revert-hook))
+ (inhibit-read-only t))
+ (cond
+ (revert-buffer-insert-file-contents-function
+ (unless (eq buffer-undo-list t)
+ ;; Get rid of all undo records for this buffer.
+ (setq buffer-undo-list nil))
+ ;; Don't make undo records for the reversion.
+ (let ((buffer-undo-list t))
(funcall revert-buffer-insert-file-contents-function
- file-name auto-save-p)
- (if (not (file-exists-p file-name))
- (error (if buffer-file-number
- "File %s no longer exists!"
- "Cannot revert nonexistent file %s")
- file-name))
+ file-name auto-save-p)))
+ ((not (file-exists-p file-name))
+ (error (if buffer-file-number
+ "File %s no longer exists!"
+ "Cannot revert nonexistent file %s")
+ file-name))
+ (t
;; Bind buffer-file-name to nil
;; so that we don't try to lock the file.
(let ((buffer-file-name nil))
(unlock-buffer)))
(widen)
(let ((coding-system-for-read
- ;; Auto-saved file shoule be read without
- ;; any code conversion.
- (if auto-save-p 'emacs-mule-unix
+ ;; Auto-saved file should be read by Emacs'
+ ;; internal coding.
+ (if auto-save-p 'auto-save-coding
(or coding-system-for-read
- buffer-file-coding-system))))
- ;; This force
- ;; after-insert-file-set-buffer-file-coding-system
+ buffer-file-coding-system-explicit))))
+ ;; This force after-insert-file-set-coding
;; (called from insert-file-contents) to set
;; buffer-file-coding-system to a proper value.
(kill-local-variable 'buffer-file-coding-system)
nil nil t))
(insert-file-contents file-name (not auto-save-p)
nil nil t)))))
- ;; Recompute the truename in case changes in symlinks
- ;; have changed the truename.
- (setq buffer-file-truename
- (abbreviate-file-name (file-truename buffer-file-name)))
- (after-find-file nil nil t t preserve-modes)
- ;; Run after-revert-hook as it was before we reverted.
- (setq-default revert-buffer-internal-hook global-hook)
- (if local-hook-p
- (progn
- (make-local-variable 'revert-buffer-internal-hook)
- (setq revert-buffer-internal-hook local-hook))
- (kill-local-variable 'revert-buffer-internal-hook))
- (run-hooks 'revert-buffer-internal-hook))
- t)))))
+ ;; Recompute the truename in case changes in symlinks
+ ;; have changed the truename.
+ (setq buffer-file-truename
+ (abbreviate-file-name (file-truename buffer-file-name)))
+ (after-find-file nil nil t t preserve-modes)
+ ;; Run after-revert-hook as it was before we reverted.
+ (setq-default revert-buffer-internal-hook global-hook)
+ (if local-hook
+ (set (make-local-variable 'revert-buffer-internal-hook)
+ local-hook)
+ (kill-local-variable 'revert-buffer-internal-hook))
+ (run-hooks 'revert-buffer-internal-hook))
+ t))))))
(defun recover-this-file ()
"Recover the visited file--get contents from its last auto-save file."
(interactive "FRecover file: ")
(setq file (expand-file-name file))
(if (auto-save-file-name-p (file-name-nondirectory file))
- (error "%s is an auto-save file" file))
+ (error "%s is an auto-save file" (abbreviate-file-name file)))
(let ((file-name (let ((buffer-file-name file))
(make-auto-save-file-name))))
(cond ((if (file-exists-p file)
(not (file-newer-than-file-p file-name file))
(not (file-exists-p file-name)))
- (error "Auto-save file %s not current" file-name))
+ (error "Auto-save file %s not current"
+ (abbreviate-file-name file-name)))
((save-window-excursion
(with-output-to-temp-buffer "*Directory*"
(buffer-disable-undo standard-output)
(insert-directory-safely file-name switches))))
(yes-or-no-p (format "Recover auto save file %s? " file-name)))
(switch-to-buffer (find-file-noselect file t))
- (let ((buffer-read-only nil)
+ (let ((inhibit-read-only t)
;; Keep the current buffer-file-coding-system.
(coding-system buffer-file-coding-system)
- ;; Auto-saved file shoule be read without any code conversion.
- (coding-system-for-read 'emacs-mule-unix))
+ ;; Auto-saved file shoule be read with special coding.
+ (coding-system-for-read 'auto-save-coding))
(erase-buffer)
(insert-file-contents file-name nil)
(set-buffer-file-coding-system coding-system))
;; a "visited file name" from that.
(progn
(forward-line 1)
- (setq autofile
- (buffer-substring-no-properties
- (point)
- (save-excursion
- (end-of-line)
- (point))))
- (setq thisfile
- (expand-file-name
- (substring
- (file-name-nondirectory autofile)
- 1 -1)
- (file-name-directory autofile)))
+ ;; If there is no auto-save file name, the
+ ;; auto-save-list file is probably corrupted.
+ (unless (eolp)
+ (setq autofile
+ (buffer-substring-no-properties
+ (point)
+ (save-excursion
+ (end-of-line)
+ (point))))
+ (setq thisfile
+ (expand-file-name
+ (substring
+ (file-name-nondirectory autofile)
+ 1 -1)
+ (file-name-directory autofile))))
(forward-line 1))
;; This pair of lines is a file-visiting
;; buffer. Use the visited file name.
(point) (progn (end-of-line) (point))))
(forward-line 1)))
;; Ignore a file if its auto-save file does not exist now.
- (if (file-exists-p autofile)
+ (if (and autofile (file-exists-p autofile))
(setq files (cons thisfile files)))))
(setq files (nreverse files))
;; The file contains a pair of line for each auto-saved buffer.
(kill-buffer buffer))))
(defun kill-some-buffers (&optional list)
- "For each buffer in LIST, ask whether to kill it.
-LIST defaults to all existing live buffers."
+ "Kill some buffers. Asks the user whether to kill each one of them.
+Non-interactively, if optional argument LIST is non-nil, it
+specifies the list of buffers to kill, asking for approval for each one."
(interactive)
(if (null list)
(setq list (buffer-list)))
(while list
(let* ((buffer (car list))
(name (buffer-name buffer)))
- (and (not (string-equal name ""))
- (/= (aref name 0) ? )
+ (and name ; Can be nil for an indirect buffer
+ ; if we killed the base buffer.
+ (not (string-equal name ""))
+ (/= (aref name 0) ?\s)
(yes-or-no-p
(format "Buffer %s %s. Kill? "
name
before calling this function. You can redefine this for customization.
See also `auto-save-file-name-p'."
(if buffer-file-name
- (let ((list auto-save-file-name-transforms)
- (filename buffer-file-name)
- result uniq)
- ;; Apply user-specified translations
- ;; to the file name.
- (while (and list (not result))
- (if (string-match (car (car list)) filename)
- (setq result (replace-match (cadr (car list)) t nil
- filename)
- uniq (car (cddr (car list)))))
- (setq list (cdr list)))
- (if result
- (if uniq
- (setq filename (concat
- (file-name-directory result)
- (subst-char-in-string
- ?/ ?!
- (replace-regexp-in-string "!" "!!"
- filename))))
- (setq filename result)))
- (setq result
- (if (and (eq system-type 'ms-dos)
- (not (msdos-long-file-names)))
- ;; We truncate the file name to DOS 8+3 limits
- ;; before doing anything else, because the regexp
- ;; passed to string-match below cannot handle
- ;; extensions longer than 3 characters, multiple
- ;; dots, and other atrocities.
- (let ((fn (dos-8+3-filename
- (file-name-nondirectory buffer-file-name))))
- (string-match
- "\\`\\([^.]+\\)\\(\\.\\(..?\\)?.?\\|\\)\\'"
- fn)
- (concat (file-name-directory buffer-file-name)
- "#" (match-string 1 fn)
- "." (match-string 3 fn) "#"))
- (concat (file-name-directory filename)
- "#"
- (file-name-nondirectory filename)
- "#")))
- ;; Make sure auto-save file names don't contain characters
- ;; invalid for the underlying filesystem.
- (if (and (memq system-type '(ms-dos windows-nt))
- ;; Don't modify remote (ange-ftp) filenames
- (not (string-match "^/\\w+@[-A-Za-z0-9._]+:" result)))
- (convert-standard-filename result)
- result))
+ (let ((handler (find-file-name-handler buffer-file-name
+ 'make-auto-save-file-name)))
+ (if handler
+ (funcall handler 'make-auto-save-file-name)
+ (let ((list auto-save-file-name-transforms)
+ (filename buffer-file-name)
+ result uniq)
+ ;; Apply user-specified translations
+ ;; to the file name.
+ (while (and list (not result))
+ (if (string-match (car (car list)) filename)
+ (setq result (replace-match (cadr (car list)) t nil
+ filename)
+ uniq (car (cddr (car list)))))
+ (setq list (cdr list)))
+ (if result
+ (if uniq
+ (setq filename (concat
+ (file-name-directory result)
+ (subst-char-in-string
+ ?/ ?!
+ (replace-regexp-in-string "!" "!!"
+ filename))))
+ (setq filename result)))
+ (setq result
+ (if (and (eq system-type 'ms-dos)
+ (not (msdos-long-file-names)))
+ ;; We truncate the file name to DOS 8+3 limits
+ ;; before doing anything else, because the regexp
+ ;; passed to string-match below cannot handle
+ ;; extensions longer than 3 characters, multiple
+ ;; dots, and other atrocities.
+ (let ((fn (dos-8+3-filename
+ (file-name-nondirectory buffer-file-name))))
+ (string-match
+ "\\`\\([^.]+\\)\\(\\.\\(..?\\)?.?\\|\\)\\'"
+ fn)
+ (concat (file-name-directory buffer-file-name)
+ "#" (match-string 1 fn)
+ "." (match-string 3 fn) "#"))
+ (concat (file-name-directory filename)
+ "#"
+ (file-name-nondirectory filename)
+ "#")))
+ ;; Make sure auto-save file names don't contain characters
+ ;; invalid for the underlying filesystem.
+ (if (and (memq system-type '(ms-dos windows-nt))
+ ;; Don't modify remote (ange-ftp) filenames
+ (not (string-match "^/\\w+@[-A-Za-z0-9._]+:" result)))
+ (convert-standard-filename result)
+ result))))
;; Deal with buffers that don't have any associated files. (Mail
;; mode tends to create a good number of these.)
"Expand wildcard pattern PATTERN.
This returns a list of file names which match the pattern.
-If PATTERN is written as an absolute relative file name,
+If PATTERN is written as an absolute file name,
the values are absolute also.
If PATTERN is written as a relative file name, it is interpreted
:group 'dired)
(defun get-free-disk-space (dir)
- "Return the mount of free space on directory DIR's file system.
+ "Return the amount of free space on directory DIR's file system.
The result is a string that gives the number of free 1KB blocks,
-or nil if the system call or the program which retrieve the infornmation
+or nil if the system call or the program which retrieve the information
fail.
This function calls `file-system-info' if it is available, or invokes the
(save-match-data
(with-temp-buffer
(when (and directory-free-space-program
- (zerop (call-process directory-free-space-program
- nil t nil
- directory-free-space-args
- dir)))
+ (eq 0 (call-process directory-free-space-program
+ nil t nil
+ directory-free-space-args
+ dir)))
;; Usual format is a header line followed by a line of
;; numbers.
(goto-char (point-min))
(forward-word -1)
(buffer-substring (point) end)))))))))
+;; The following expression replaces `dired-move-to-filename-regexp'.
+(defvar directory-listing-before-filename-regexp
+ (let* ((l "\\([A-Za-z]\\|[^\0-\177]\\)")
+ (l-or-quote "\\([A-Za-z']\\|[^\0-\177]\\)")
+ ;; In some locales, month abbreviations are as short as 2 letters,
+ ;; and they can be followed by ".".
+ ;; In Breton, a month name can include a quote character.
+ (month (concat l-or-quote l-or-quote "+\\.?"))
+ (s " ")
+ (yyyy "[0-9][0-9][0-9][0-9]")
+ (dd "[ 0-3][0-9]")
+ (HH:MM "[ 0-2][0-9][:.][0-5][0-9]")
+ (seconds "[0-6][0-9]\\([.,][0-9]+\\)?")
+ (zone "[-+][0-2][0-9][0-5][0-9]")
+ (iso-mm-dd "[01][0-9]-[0-3][0-9]")
+ (iso-time (concat HH:MM "\\(:" seconds "\\( ?" zone "\\)?\\)?"))
+ (iso (concat "\\(\\(" yyyy "-\\)?" iso-mm-dd "[ T]" iso-time
+ "\\|" yyyy "-" iso-mm-dd "\\)"))
+ (western (concat "\\(" month s "+" dd "\\|" dd "\\.?" s month "\\)"
+ s "+"
+ "\\(" HH:MM "\\|" yyyy "\\)"))
+ (western-comma (concat month s "+" dd "," s "+" yyyy))
+ ;; Japanese MS-Windows ls-lisp has one-digit months, and
+ ;; omits the Kanji characters after month and day-of-month.
+ ;; On Mac OS X 10.3, the date format in East Asian locales is
+ ;; day-of-month digits followed by month digits.
+ (mm "[ 0-1]?[0-9]")
+ (east-asian
+ (concat "\\(" mm l "?" s dd l "?" s "+"
+ "\\|" dd s mm s "+" "\\)"
+ "\\(" HH:MM "\\|" yyyy l "?" "\\)")))
+ ;; The "[0-9]" below requires the previous column to end in a digit.
+ ;; This avoids recognizing `1 may 1997' as a date in the line:
+ ;; -r--r--r-- 1 may 1997 1168 Oct 19 16:49 README
+
+ ;; The "[BkKMGTPEZY]?" below supports "ls -alh" output.
+ ;; The ".*" below finds the last match if there are multiple matches.
+ ;; This avoids recognizing `jservice 10 1024' as a date in the line:
+ ;; drwxr-xr-x 3 jservice 10 1024 Jul 2 1997 esg-host
+
+ ;; vc dired listings provide the state or blanks between file
+ ;; permissions and date. The state is always surrounded by
+ ;; parantheses:
+ ;; -rw-r--r-- (modified) 2005-10-22 21:25 files.el
+ ;; This is not supported yet.
+ (concat ".*[0-9][BkKMGTPEZY]?" s
+ "\\(" western "\\|" western-comma "\\|" east-asian "\\|" iso "\\)"
+ s "+"))
+ "Regular expression to match up to the file name in a directory listing.
+The default value is designed to recognize dates and times
+regardless of the language.")
+
+(defvar insert-directory-ls-version 'unknown)
;; insert-directory
;; - must insert _exactly_one_line_ describing FILE if WILDCARD and
(defun insert-directory (file switches &optional wildcard full-directory-p)
"Insert directory listing for FILE, formatted according to SWITCHES.
Leaves point after the inserted text.
-SWITCHES may be a string of options, or a list of strings.
+SWITCHES may be a string of options, or a list of strings
+representing individual options.
Optional third arg WILDCARD means treat FILE as shell wildcard.
Optional fourth arg FULL-DIRECTORY-P means file is a directory and
switches do not contain `d', so that a full listing is expected.
This works by running a directory listing program
whose name is in the variable `insert-directory-program'.
-If WILDCARD, it also runs the shell specified by `shell-file-name'."
+If WILDCARD, it also runs the shell specified by `shell-file-name'.
+
+When SWITCHES contains the long `--dired' option, this function
+treats it specially, for the sake of dired. However, the
+normally equivalent short `-D' option is just passed on to
+`insert-directory-program', as any other option."
;; We need the directory in order to find the right handler.
(let ((handler (find-file-name-handler (expand-file-name file)
'insert-directory)))
wildcard full-directory-p)
(if (eq system-type 'vax-vms)
(vms-read-directory file switches (current-buffer))
- (let (result available (beg (point)))
+ (let (result (beg (point)))
;; Read the actual directory using `insert-directory-program'.
;; RESULT gets the status code.
(concat (file-name-as-directory file) ".")
file))))))))
+ ;; If we got "//DIRED//" in the output, it means we got a real
+ ;; directory listing, even if `ls' returned nonzero.
+ ;; So ignore any errors.
+ (when (if (stringp switches)
+ (string-match "--dired\\>" switches)
+ (member "--dired" switches))
+ (save-excursion
+ (forward-line -2)
+ (when (looking-at "//SUBDIRED//")
+ (forward-line -1))
+ (if (looking-at "//DIRED//")
+ (setq result 0))))
+
+ (when (and (not (eq 0 result))
+ (eq insert-directory-ls-version 'unknown))
+ ;; The first time ls returns an error,
+ ;; find the version numbers of ls,
+ ;; and set insert-directory-ls-version
+ ;; to > if it is more than 5.2.1, < if it is less, nil if it
+ ;; is equal or if the info cannot be obtained.
+ ;; (That can mean it isn't GNU ls.)
+ (let ((version-out
+ (with-temp-buffer
+ (call-process "ls" nil t nil "--version")
+ (buffer-string))))
+ (if (string-match "ls (.*utils) \\([0-9.]*\\)$" version-out)
+ (let* ((version (match-string 1 version-out))
+ (split (split-string version "[.]"))
+ (numbers (mapcar 'string-to-number split))
+ (min '(5 2 1))
+ comparison)
+ (while (and (not comparison) (or numbers min))
+ (cond ((null min)
+ (setq comparison '>))
+ ((null numbers)
+ (setq comparison '<))
+ ((> (car numbers) (car min))
+ (setq comparison '>))
+ ((< (car numbers) (car min))
+ (setq comparison '<))
+ (t
+ (setq numbers (cdr numbers)
+ min (cdr min)))))
+ (setq insert-directory-ls-version (or comparison '=)))
+ (setq insert-directory-ls-version nil))))
+
+ ;; For GNU ls versions 5.2.2 and up, ignore minor errors.
+ (when (and (eq 1 result) (eq insert-directory-ls-version '>))
+ (setq result 0))
+
;; If `insert-directory-program' failed, signal an error.
- (if (/= result 0)
- ;; On non-Posix systems, we cannot open a directory, so
- ;; don't even try, because that will always result in
- ;; the ubiquitous "Access denied". Instead, show the
- ;; command line so the user can try to guess what went wrong.
- (if (and (file-directory-p file)
- (memq system-type '(ms-dos windows-nt)))
- (error
- "Reading directory: \"%s %s -- %s\" exited with status %s"
- insert-directory-program
- (if (listp switches) (concat switches) switches)
- file result)
- ;; Unix. Access the file to get a suitable error.
- (access-file file "Reading directory")
- (error "Listing directory failed but `access-file' worked")))
-
- (when (string-match "--dired\\>" switches)
+ (unless (eq 0 result)
+ ;; Delete the error message it may have output.
+ (delete-region beg (point))
+ ;; On non-Posix systems, we cannot open a directory, so
+ ;; don't even try, because that will always result in
+ ;; the ubiquitous "Access denied". Instead, show the
+ ;; command line so the user can try to guess what went wrong.
+ (if (and (file-directory-p file)
+ (memq system-type '(ms-dos windows-nt)))
+ (error
+ "Reading directory: \"%s %s -- %s\" exited with status %s"
+ insert-directory-program
+ (if (listp switches) (concat switches) switches)
+ file result)
+ ;; Unix. Access the file to get a suitable error.
+ (access-file file "Reading directory")
+ (error "Listing directory failed but `access-file' worked")))
+
+ (when (if (stringp switches)
+ (string-match "--dired\\>" switches)
+ (member "--dired" switches))
+ ;; The following overshoots by one line for an empty
+ ;; directory listed with "--dired", but without "-a"
+ ;; switch, where the ls output contains a
+ ;; "//DIRED-OPTIONS//" line, but no "//DIRED//" line.
+ ;; We take care of that case later.
(forward-line -2)
(when (looking-at "//SUBDIRED//")
(delete-region (point) (progn (forward-line 1) (point)))
(forward-line -1))
- (let ((end (line-end-position)))
- (forward-word 1)
- (forward-char 3)
- (while (< (point) end)
- (let ((start (+ beg (read (current-buffer))))
- (end (+ beg (read (current-buffer)))))
- (if (= (char-after end) ?\n)
- (put-text-property start end 'dired-filename t)
- ;; It seems that we can't trust ls's output as to
- ;; byte positions of filenames.
- (put-text-property beg (point) 'dired-filename nil)
- (end-of-line))))
- (goto-char end)
- (beginning-of-line)
- (delete-region (point) (progn (forward-line 2) (point)))))
+ (if (looking-at "//DIRED//")
+ (let ((end (line-end-position))
+ (linebeg (point))
+ error-lines)
+ ;; Find all the lines that are error messages,
+ ;; and record the bounds of each one.
+ (goto-char beg)
+ (while (< (point) linebeg)
+ (or (eql (following-char) ?\s)
+ (push (list (point) (line-end-position)) error-lines))
+ (forward-line 1))
+ (setq error-lines (nreverse error-lines))
+ ;; Now read the numeric positions of file names.
+ (goto-char linebeg)
+ (forward-word 1)
+ (forward-char 3)
+ (while (< (point) end)
+ (let ((start (insert-directory-adj-pos
+ (+ beg (read (current-buffer)))
+ error-lines))
+ (end (insert-directory-adj-pos
+ (+ beg (read (current-buffer)))
+ error-lines)))
+ (if (memq (char-after end) '(?\n ?\s))
+ ;; End is followed by \n or by " -> ".
+ (put-text-property start end 'dired-filename t)
+ ;; It seems that we can't trust ls's output as to
+ ;; byte positions of filenames.
+ (put-text-property beg (point) 'dired-filename nil)
+ (end-of-line))))
+ (goto-char end)
+ (beginning-of-line)
+ (delete-region (point) (progn (forward-line 1) (point))))
+ ;; Take care of the case where the ls output contains a
+ ;; "//DIRED-OPTIONS//"-line, but no "//DIRED//"-line
+ ;; and we went one line too far back (see above).
+ (forward-line 1))
+ (if (looking-at "//DIRED-OPTIONS//")
+ (delete-region (point) (progn (forward-line 1) (point)))))
;; Now decode what read if necessary.
(let ((coding (or coding-system-for-read
file-name-coding-system
default-file-name-coding-system
'undecided))
+ coding-no-eol
val pos)
(when (and enable-multibyte-characters
(not (memq (coding-system-base coding)
(setq coding (detect-coding-region beg (point) t)))
(if (not (eq (coding-system-base coding) 'undecided))
(save-restriction
+ (setq coding-no-eol
+ (coding-system-change-eol-conversion coding 'unix))
(narrow-to-region beg (point))
(goto-char (point-min))
(while (not (eobp))
val (get-text-property (point) 'dired-filename))
(goto-char (next-single-property-change
(point) 'dired-filename nil (point-max)))
- (decode-coding-region pos (point) coding)
+ ;; Force no eol conversion on a file name, so
+ ;; that CR is preserved.
+ (decode-coding-region pos (point)
+ (if val coding-no-eol coding))
(if val
(put-text-property pos (point)
'dired-filename t)))))))
(end-of-line)
(insert " available " available)))))))))))
+(defun insert-directory-adj-pos (pos error-lines)
+ "Convert `ls --dired' file name position value POS to a buffer position.
+File name position values returned in ls --dired output
+count only stdout; they don't count the error messages sent to stderr.
+So this function converts to them to real buffer positions.
+ERROR-LINES is a list of buffer positions of error message lines,
+of the form (START END)."
+ (while (and error-lines (< (caar error-lines) pos))
+ (setq pos (+ pos (- (nth 1 (car error-lines)) (nth 0 (car error-lines)))))
+ (pop error-lines))
+ pos)
+
(defun insert-directory-safely (file switches
&optional wildcard full-directory-p)
"Insert directory listing for FILE, formatted according to SWITCHES.
:type '(choice (const :tag "Ask with yes-or-no-p" yes-or-no-p)
(const :tag "Ask with y-or-n-p" y-or-n-p)
(const :tag "Don't confirm" nil))
- :group 'emacs
+ :group 'convenience
:version "21.1")
(defun save-buffers-kill-emacs (&optional arg)
;; Get a list of the indices of the args which are file names.
(file-arg-indices
(cdr (or (assq operation
- ;; The first five are special because they
+ ;; The first six are special because they
;; return a file name. We want to include the /:
;; in the return value.
;; So just avoid stripping it in the first place.
(file-name-as-directory . nil)
(directory-file-name . nil)
(file-name-sans-versions . nil)
+ (find-backup-file-name . nil)
;; `identity' means just return the first arg
- ;; as stripped of its quoting.
- (substitute-in-file-name . identity)
+ ;; not stripped of its quoting.
+ (substitute-in-file-name identity)
+ ;; `add' means add "/:" to the result.
+ (file-truename add 0)
+ ;; `quote' means add "/:" to buffer-file-name.
+ (insert-file-contents quote 0)
+ ;; `unquote-then-quote' means set buffer-file-name
+ ;; temporarily to unquoted filename.
+ (verify-visited-file-modtime unquote-then-quote)
+ ;; List the arguments which are filenames.
(file-name-completion 1)
(file-name-all-completions 1)
+ (write-region 2 5)
(rename-file 0 1)
(copy-file 0 1)
(make-symbolic-link 0 1)
;; For all other operations, treat the first argument only
;; as the file name.
'(nil 0))))
+ method
;; Copy ARGUMENTS so we can replace elements in it.
(arguments (copy-sequence arguments)))
- ;; Strip off the /: from the file names that have this handler.
+ (if (symbolp (car file-arg-indices))
+ (setq method (pop file-arg-indices)))
+ ;; Strip off the /: from the file names that have it.
(save-match-data
(while (consp file-arg-indices)
(let ((pair (nthcdr (car file-arg-indices) arguments)))
"/"
(substring (car pair) 2)))))
(setq file-arg-indices (cdr file-arg-indices))))
- (if (eq file-arg-indices 'identity)
- (car arguments)
- (apply operation arguments))))
+ (cond ((eq method 'identity)
+ (car arguments))
+ ((eq method 'add)
+ (concat "/:" (apply operation arguments)))
+ ((eq method 'quote)
+ (unwind-protect
+ (apply operation arguments)
+ (setq buffer-file-name (concat "/:" buffer-file-name))))
+ ((eq method 'unquote-then-quote)
+ (let (res)
+ (setq buffer-file-name (substring buffer-file-name 2))
+ (setq res (apply operation arguments))
+ (setq buffer-file-name (concat "/:" buffer-file-name))
+ res))
+ (t
+ (apply operation arguments)))))
\f
(define-key ctl-x-map "\C-f" 'find-file)
(define-key ctl-x-map "\C-r" 'find-file-read-only)
(define-key ctl-x-5-map "f" 'find-file-other-frame)
(define-key ctl-x-5-map "\C-f" 'find-file-other-frame)
(define-key ctl-x-5-map "r" 'find-file-read-only-other-frame)
+(define-key ctl-x-5-map "\C-o" 'display-buffer-other-frame)
+;; arch-tag: bc68d3ea-19ca-468b-aac6-3a4a7766101f
;;; files.el ends here
HCoop / bpt / emacs.git / blobdiff