;;; files.el --- file input and output commands for Emacs ;; Copyright (C) 1985, 1986, 1987, 1992, 1993, 1994 ;;; Free Software Foundation, Inc. ;; This file is part of GNU Emacs. ;; GNU Emacs is free software; you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published by ;; the Free Software Foundation; either version 2, or (at your option) ;; any later version. ;; GNU Emacs is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; 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, 675 Mass Ave, Cambridge, MA 02139, USA. ;;; Commentary: ;; Defines most of Emacs's file- and directory-handling functions, ;; including basic file visiting, backup generation, link handling, ;; ITS-id version control, load- and write-hook handling, and the like. ;;; Code: ;; In buffer.c ;(defconst delete-auto-save-files t ; "*Non-nil means delete a buffer's auto-save file when the buffer is saved.") ;;; Turn off backup files on VMS since it has version numbers. (defconst make-backup-files (not (eq system-type 'vax-vms)) "*Non-nil means make a backup of a file the first time it is saved. This can be done by renaming the file or by copying. Renaming means that Emacs renames the existing file so that it is a backup file, then writes the buffer into a new file. Any other names that the old file had will now refer to the backup file. The new file is owned by you and its group is defaulted. Copying means that Emacs copies the existing file into the backup file, then writes the buffer on top of the existing file. Any other names that the old file had will now refer to the new (edited) file. The file's owner and group are unchanged. The choice of renaming or copying is controlled by the variables `backup-by-copying', `backup-by-copying-when-linked' and `backup-by-copying-when-mismatch'. See also `backup-inhibited'.") ;; Do this so that local variables based on the file name ;; are not overridden by the major mode. (defvar backup-inhibited nil "Non-nil means don't make a backup, regardless of the other parameters. This variable is intended for use by making it local to a buffer. But it is local only if you make it local.") (put 'backup-inhibited 'permanent-local t) (defconst backup-by-copying nil "*Non-nil means always use copying to create backup files. See documentation of variable `make-backup-files'.") (defconst backup-by-copying-when-linked nil "*Non-nil means use copying to create backups for files with multiple names. This causes the alternate names to refer to the latest version as edited. This variable is relevant only if `backup-by-copying' is nil.") (defconst backup-by-copying-when-mismatch nil "*Non-nil means create backups by copying if this preserves owner or group. Renaming may still be used (subject to control of other variables) when it would not result in changing the owner or group of the file; that is, for files which are owned by you and whose group matches the default for a new file created there by you. This variable is relevant only if `backup-by-copying' is nil.") (defvar backup-enable-predicate '(lambda (name) (or (< (length name) 5) (not (string-equal "/tmp/" (substring name 0 5))))) "Predicate that looks at a file name and decides whether to make backups. Called with an absolute file name as argument, it returns t to enable backup.") (defconst buffer-offer-save nil "*Non-nil in a buffer means offer to save the buffer on exit even if the buffer is not visiting a file. Automatically local in all buffers.") (make-variable-buffer-local 'buffer-offer-save) ;; FSFmacs ;(defconst find-file-existing-other-name nil ; "*Non-nil means find a file under alternative names, in existing buffers. ;This means if any existing buffer is visiting the file you want ;under another name, you get the existing buffer instead of a new buffer.") ; ;(defconst find-file-visit-truename nil ; "*Non-nil means visit a file under its truename. ;The truename of a file is found by chasing all links ;both at the file level and at the levels of the containing directories.") ; ;(defvar buffer-file-truename nil ; "The abbreviated truename of the file visited in the current buffer. ;That is, (abbreviated-file-name (file-truename buffer-file-name)). ;This variable is automatically local in all buffers, when non-nil.") ;(make-variable-buffer-local 'buffer-file-truename) ;(put 'buffer-file-truename 'permanent-local t) (defvar buffer-file-number nil "The device number and file number of the file visited in the current buffer. The value is a list of the form (FILENUM DEVNUM). This pair of numbers uniquely identifies the file. If the buffer is visiting a new file, the value is nil.") (make-variable-buffer-local 'buffer-file-number) (put 'buffer-file-number 'permanent-local t) (defconst file-precious-flag nil "*Non-nil means protect against I/O errors while saving files. Some modes set this non-nil in particular buffers.") (defvar version-control nil "*Control use of version numbers for backup files. t means make numeric backup versions unconditionally. nil means make them for files that have some already. `never' means do not make them.") (defvar dired-kept-versions 2 "*When cleaning directory, number of versions to keep.") (defvar trim-versions-without-asking nil "*If t, deletes excess backup versions silently. If nil, asks confirmation. Any other value prevents any trimming.") (defvar kept-old-versions 2 "*Number of oldest versions to keep when a new numbered backup is made.") (defvar kept-new-versions 2 "*Number of newest versions to keep when a new numbered backup is made. Includes the new backup. Must be > 0") (defconst 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.") (defconst auto-save-default t "*Non-nil says by default do auto-saving of every file-visiting buffer.") (defconst auto-save-visited-file-name nil "*Non-nil says auto-save a buffer in the file it is visiting, when practical. Normally auto-save files are written under other names.") (defconst save-abbrevs nil "*Non-nil means save word abbrevs too when files are saved. Loading an abbrev file sets this to t.") (defconst find-file-run-dired t "*Non-nil says run dired if `find-file' is given the name of a directory.") ;;;It is not useful to make this a local variable. ;;;(put 'find-file-not-found-hooks 'permanent-local t) (defvar find-file-not-found-hooks nil "List of functions to be called for `find-file' on nonexistent file. These functions are called as soon as the error is detected. `buffer-file-name' is already set up. The functions are called in the order given until one of them returns non-nil.") ;;;It is not useful to make this a local variable. ;;;(put 'find-file-hooks 'permanent-local t) (defvar find-file-hooks 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.") (defvar write-file-hooks 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. These hooks are considered to pertain to the visited file. So this list is cleared if you change the visited file name. See also `write-contents-hooks' and `continue-save-buffer'. Don't make this variable buffer-local; instead, use `local-write-file-hooks'.") ;;; However, in case someone does make it local... (put 'write-file-hooks 'permanent-local t) (defvar local-write-file-hooks nil "Just like `write-file-hooks', except intended for per-buffer use. The functions in this list are called before the ones in `write-file-hooks'.") (make-variable-buffer-local 'local-write-file-hooks) (put 'local-write-file-hooks 'permanent-local t) (put 'after-save-hook 'permanent-local t) (defvar after-save-hook nil "List of functions to be called after writing out a buffer to a file. These hooks are considered to pertain to the visited file. So this list is cleared if you change the visited file name.") ;;; Old lemacs name; kept around for compatibility. (put 'after-write-file-hooks 'permanent-local t) (defvar after-write-file-hooks nil "This variable is obsolete, though supported temporarily; you should use the variable `after-save-hook' instead.") ;; #### think about this (added by Sun.) (put 'after-set-visited-file-name-hooks 'permanent-local t) (defvar after-set-visited-file-name-hooks nil "List of functions to be called after \\[set-visited-file-name] or during \\[write-file]. You can use this hook to restore local values of write-file-hooks, after-write-file-hooks, and revert-buffer-function, which pertain to a specific file and therefore are normally killed by a rename. Put hooks pertaining to the buffer contents on write-contents-hooks and revert-buffer-insert-file-contents-function.") (defvar write-contents-hooks 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. These hooks are considered to 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-hooks' and `continue-save-buffer'.") ;; Not in FSF19 ;; Energize needed this to hook into save-buffer at a lower level; we need ;; to provide a new output method, but don't want to have to duplicate all ;; of the backup file and file modes logic.that does not occur if one uses ;; a write-file-hook which returns non-nil. (put 'write-file-data-hooks 'permanent-local t) (defvar write-file-data-hooks nil "List of functions to be called to put the bytes on disk. These functions receive the name of the file to write to as argument. The default behavior is to call (write-region (point-min) (point-max) filename nil t) If one of them returns non-nil, the file is considered already written and the rest are not called. These hooks are considered to pertain to the visited file. So this list is cleared if you change the visited file name. See also `write-file-hooks'.") (defconst enable-local-variables t "*Control use of local-variables lists in files you visit. The value can be t, nil or something else. A value of t means local-variables lists are obeyed; nil means they are ignored; anything else means query. The command \\[normal-mode] always obeys local-variables lists and ignores this variable.") (defconst enable-local-eval 'maybe "*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.") ;; Avoid losing in versions where CLASH_DETECTION is disabled. (or (fboundp 'lock-buffer) (defalias 'lock-buffer 'ignore)) (or (fboundp 'unlock-buffer) (defalias 'unlock-buffer 'ignore)) ;;RMSmacs bastardized ange-ftp cruft ;; This hook function provides support for ange-ftp host name ;; completion. It runs the usual ange-ftp hook, but only for ;; completion operations. Having this here avoids the need ;; to load ange-ftp when it's not really in use. ;(defun ange-ftp-completion-hook-function (op &rest args) ; (if (memq op '(file-name-completion file-name-all-completions)) ; (apply 'ange-ftp-hook-function op args) ; (let ((inhibit-file-name-handlers ; (cons 'ange-ftp-completion-hook-function ; (and (eq inhibit-file-name-operation op) ; inhibit-file-name-handlers))) ; (inhibit-file-name-operation op)) ; (apply op args)) (defun pwd () "Show the current default directory." (interactive nil) (message "Directory %s" default-directory)) (defvar cd-path nil "Value of the CDPATH environment variable, as a list. Not actually set up until the first time you you use it.") (defun parse-colon-path (cd-path) "Explode a colon-separated list of paths into a string list." (and cd-path (let (cd-list (cd-start 0) cd-colon) (setq cd-path (concat cd-path ":")) (while (setq cd-colon (string-match ":" cd-path cd-start)) (setq cd-list (nconc cd-list (list (if (= cd-start cd-colon) nil (substitute-in-file-name (file-name-as-directory (substring cd-path cd-start cd-colon))))))) (setq cd-start (+ cd-colon 1))) cd-list))) (defun cd-absolute (dir) "Change current directory to given absolute file name DIR." (setq dir (abbreviate-file-name (expand-file-name dir))) (if (not (eq system-type 'vax-vms)) (setq dir (file-name-as-directory dir))) (cond ((not (file-directory-p dir)) (error "%s is not a directory" dir)) ; this breaks ange-ftp, which doesn't (can't?) overload `file-executable-p'. ;;((not (file-executable-p dir)) ;; (error "Cannot cd to %s: Permission denied" dir)) (t (setq default-directory dir)))) (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." (interactive "DChange default directory: ") (if (file-name-absolute-p dir) (cd-absolute (expand-file-name dir)) (progn (if (null cd-path) ;;>>> Unix-specific (let ((trypath (parse-colon-path (getenv "CDPATH")))) (setq cd-path (or trypath (list "./"))))) (or (catch 'found (mapcar #'(lambda (x) (let ((f (expand-file-name (concat x dir)))) (if (file-directory-p f) (progn (cd-absolute f) (throw 'found t))))) cd-path) nil) ;; jwz: give a better error message to those of us with the ;; good taste not to use a kludge like $CDPATH. (if (equal cd-path '("./")) (error "No such directory: %s" (expand-file-name dir)) (error "Directory not found in $CDPATH: %s" dir)))))) (defun load-file (file) "Load the Lisp file named FILE." (interactive "fLoad file: ") (load (expand-file-name file) nil nil t)) (defun load-library (library) "Load the library named LIBRARY. This is an interface to the function `load'." (interactive "sLoad library: ") (load library)) (defun file-local-copy (file &optional buffer) "Copy the file FILE into a temporary file on this machine. Returns the name of the local copy, or nil, if FILE is directly accessible." (let ((handler (find-file-name-handler file 'file-local-copy))) (if handler (funcall handler 'file-local-copy file) nil))) ;(defun file-truename (filename) ; "Return the truename of FILENAME, which should be absolute. ;The truename of a file name is found by chasing symbolic links ;both at the level of the file and at the level of the directories ;containing it, until no links are left at any level." ; (if (or (string= filename "~") ; (and (string= (substring filename 0 1) "~") ; (string-match "~[^/]*" filename))) ; (progn ; (setq filename (expand-file-name filename)) ; (if (string= filename "") ; (setq filename "/")))) ; (let ((handler (find-file-name-handler filename 'file-truename))) ; ;; For file name that has a special handler, call handler. ; ;; This is so that ange-ftp can save time by doing a no-op. ; (if handler ; (funcall handler 'file-truename filename) ; (let ((dir (file-name-directory filename)) ; target dirfile) ; ;; Get the truename of the directory. ; (setq dirfile (directory-file-name dir)) ; ;; If these are equal, we have the (or a) root directory. ; (or (string= dir dirfile) ; (setq dir (file-name-as-directory (file-truename dirfile)))) ; (if (equal ".." (file-name-nondirectory filename)) ; (directory-file-name (file-name-directory (directory-file-name dir))) ; (if (equal "." (file-name-nondirectory filename)) ; (directory-file-name dir) ; ;; Put it back on the file name. ; (setq filename (concat dir (file-name-nondirectory filename))) ; ;; Is the file name the name of a link? ; (setq target (file-symlink-p filename)) ; (if target ; ;; Yes => chase that link, then start all over ; ;; since the link may point to a directory name that uses links. ; ;; We can't safely use expand-file-name here ; ;; since target might look like foo/../bar where foo ; ;; is itself a link. Instead, we handle . and .. above. ; (if (file-name-absolute-p target) ; (file-truename target) ; (file-truename (concat dir target))) ; ;; No, we are done! ; filename))))))) (defun file-chase-links (filename) "Chase links in FILENAME until a name that is not a link. Does not examine containing directories for links, unlike `file-truename'." (let (tem (count 100) (newname filename)) (while (setq tem (file-symlink-p newname)) (if (= count 0) (error "Apparent cycle of symbolic links for %s" filename)) ;; Handle `..' by hand, since it needs to work in the ;; target of any directory symlink. ;; This code is not quite complete; it does not handle ;; embedded .. in some cases such as ./../foo and foo/bar/../../../lose. (while (string-match "\\.\\./" tem) ;>>> Unix specific (setq tem (substring tem 3)) (setq newname (file-name-as-directory ;; Do the .. by hand. (directory-file-name (file-name-directory ;; Chase links in the default dir of the symlink. (file-chase-links (directory-file-name (file-name-directory newname)))))))) (setq newname (expand-file-name tem (file-name-directory newname))) (setq count (1- count))) newname)) (defun switch-to-other-buffer (arg) "Switch to the previous buffer. With a numeric arg, n, switch to the nth most recent buffer. With an arg of 0, buries the current buffer at the bottom of the buffer stack." (interactive "p") (if (eq arg 0) (bury-buffer (current-buffer))) (switch-to-buffer (if (<= arg 1) (other-buffer (current-buffer)) (nth (1+ arg) (buffer-list))))) (defun switch-to-buffer-other-window (buffer) "Select buffer BUFFER in another window." (interactive "BSwitch to buffer in other window: ") (let ((pop-up-windows t)) (pop-to-buffer buffer t (selected-screen)))) (defun switch-to-buffer-other-screen (buffer) "Switch to buffer BUFFER in a newly-created screen." (interactive "BSwitch to buffer in other screen: ") (let* ((name (get-screen-name-for-buffer buffer)) (screen (make-screen (if name (list (cons 'name (symbol-name name))))))) (pop-to-buffer buffer t screen) (make-screen-visible screen) buffer)) (defun find-file (filename) "Edit file FILENAME. Switch to a buffer visiting file FILENAME, creating one if none already exists." (interactive "FFind file: ") (switch-to-buffer (find-file-noselect filename))) (defun find-file-other-window (filename) "Edit file FILENAME, in another window. May create a new window, or reuse an existing one. See the function `display-buffer'." (interactive "FFind file in other window: ") (switch-to-buffer-other-window (find-file-noselect filename))) (defun find-file-other-screen (filename) "Edit file FILENAME, in a newly-created screen." (interactive "FFind file in other screen: ") (switch-to-buffer-other-screen (find-file-noselect filename))) (defun find-file-read-only (filename) "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 "fFind file read-only: ") (find-file filename) (setq buffer-read-only t) (current-buffer)) (defun find-file-read-only-other-window (filename) "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 "fFind file read-only other window: ") (find-file-other-window filename) (setq buffer-read-only t) (current-buffer)) (defun find-file-read-only-other-screen (filename) "Edit file FILENAME in another screen but don't allow changes. Like \\[find-file-other-screen] but marks buffer as read-only. Use \\[toggle-read-only] to permit editing." (interactive "fFind file read-only other screen: ") (find-file-other-screen filename) (setq buffer-read-only t) (current-buffer)) (defun find-alternate-file (filename) "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." (interactive (let ((file buffer-file-name) (file-name nil) (file-dir nil)) (and file (setq file-name (file-name-nondirectory file) file-dir (file-name-directory file))) (list (read-file-name (gettext "Find alternate file: ") file-dir nil nil file-name)))) (and (buffer-modified-p) ;; (not buffer-read-only) (not (yes-or-no-p (format (gettext "Buffer %s is modified; kill anyway? ") (buffer-name)))) (error (gettext "Aborted"))) (let ((obuf (current-buffer)) (ofile buffer-file-name) (onum buffer-file-number) (otrue buffer-file-truename) (oname (buffer-name))) (rename-buffer (gettext " **lose**")) (setq buffer-file-name nil) (setq buffer-file-number nil) (setq buffer-file-truename nil) (unwind-protect (progn (unlock-buffer) (find-file filename)) (cond ((eq obuf (current-buffer)) (setq buffer-file-name ofile) (setq buffer-file-number onum) (setq buffer-file-truename otrue) (lock-buffer) (rename-buffer oname)))) (or (eq (current-buffer) obuf) (kill-buffer obuf)))) (defun create-file-buffer (filename) "Create a suitably named buffer for visiting FILENAME, and return it. FILENAME (sans directory) is used unchanged if that name is free; otherwise a string <2> or <3> or ... is appended to get an unused name." (let ((lastname (file-name-nondirectory filename))) (if (string= lastname "") (setq lastname filename)) (generate-new-buffer lastname))) ; This is in C so that Finsert_file_contents can call it (when VISIT is true.) ;(defun compute-buffer-file-truename () ; "Recomputes this buffer's value of `buffer-file-truename' ;based on the current value of `buffer-file-name'." ; (cond ((null buffer-file-name) ; (setq buffer-file-truename nil)) ; ((setq buffer-file-truename (truename buffer-file-name)) ; ;; it exists, we're done. ; nil) ; (t ; ;; the file doesn't exist, but maybe the directory does. ; (let* ((dir (file-name-directory buffer-file-name)) ; (truedir (truename dir))) ; (if truedir (setq dir truedir)) ; (setq buffer-file-truename ; (expand-file-name (file-name-nondirectory buffer-file-name) ; dir))))) ; (if (and find-file-use-truenames buffer-file-truename) ; (setq buffer-file-name (abbreviate-file-name buffer-file-truename) ; default-directory (file-name-directory buffer-file-name))) ; buffer-file-truename) ;;; RMSmacs ;(defun find-buffer-visiting (filename) ; "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 there is no such live buffer, return nil." ; (let ((buf (get-file-buffer filename)) ; (truename (abbreviate-file-name (file-truename filename)))) ; (or buf ; (let ((list (buffer-list)) found) ; (while (and (not found) list) ; (save-excursion ; (set-buffer (car list)) ; (if (and buffer-file-name ; (string= buffer-file-truename truename)) ; (setq found (car list)))) ; (setq list (cdr list))) ; found) ; (let ((number (nthcdr 10 (file-attributes truename))) ; (list (buffer-list)) found) ; (and number ; (while (and (not found) list) ; (save-excursion ; (set-buffer (car list)) ; (if (and buffer-file-number ; (equal buffer-file-number number) ; ;; Verify this buffer's file number ; ;; still belongs to its file. ; (file-exists-p buffer-file-name) ; (equal (nthcdr 10 (file-attributes buffer-file-name)) ; number)) ; (setq found (car list)))) ; (setq list (cdr list)))) ; found)))) (defvar find-file-not-true-dirname-list nil "*List of logical names for which visiting shouldn't save the true dirname. On VMS, when you visit a file using a logical name that searches a path, you may or may not want the visited file name to record the specific directory where the file was found. If you *do not* want that, add the logical name to this list as a string.") (defun find-file-noselect (filename &optional nowarn) "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." (setq filename (abbreviate-file-name (expand-file-name filename))) (if (file-directory-p filename) (if find-file-run-dired (dired-noselect filename) (error (gettext "%s is a directory.") filename)) (let* ((buf (get-file-buffer filename)) ; (truename (abbreviate-file-name (file-truename filename))) ; (number (nthcdr 10 (file-attributes truename))) (number (and buffer-file-truename (nthcdr 10 (file-attributes buffer-file-truename)))) ; ;; Find any buffer for a file which has same truename. ; (other (and (not buf) (find-buffer-visiting filename))) (error nil)) ; ;; Let user know if there is a buffer with the same truename. ; (if (and (not buf) same-truename (not nowarn)) ; (message "%s and %s are the same file (%s)" ; filename (buffer-file-name same-truename) ; truename) ; (if (and (not buf) same-number (not nowarn)) ; (message "%s and %s are the same file" ; filename (buffer-file-name same-number)))) ; ;; Optionally also find that buffer. ; (if (or find-file-existing-other-name find-file-visit-truename) ; (setq buf (or same-truename same-number))) (if (and buf (or find-file-compare-truenames find-file-use-truenames) (not nowarn)) (save-excursion (set-buffer buf) (if (not (equal buffer-file-name filename)) (message (gettext "%s and %s are the same file (%s)") filename buffer-file-name buffer-file-truename)))) (if buf (or nowarn (verify-visited-file-modtime buf) (cond ((not (file-exists-p filename)) (error (gettext "File %s no longer exists!") filename)) ((yes-or-no-p (format (if (buffer-modified-p buf) (gettext "File %s changed on disk. Discard your edits? ") (gettext "File %s changed on disk. Read the new version? ")) (file-name-nondirectory filename))) (save-excursion (set-buffer buf) (revert-buffer t t))))) (save-excursion (let* ((link-name (car (file-attributes filename))) (linked-buf (and (stringp link-name) (get-file-buffer link-name)))) (if (bufferp linked-buf) (message (gettext "Symbolic link to file in buffer %s") (buffer-name linked-buf)))) (setq buf (create-file-buffer filename)) (set-buffer buf) (erase-buffer) (condition-case e (insert-file-contents filename t) (file-error (setq error e) ;; Run find-file-not-found-hooks until one returns non-nil. (let ((hooks find-file-not-found-hooks)) (while (and hooks (not (and (funcall (car hooks)) ;; If a hook succeeded, clear error. (progn (setq error nil) ;; Also exit the loop. t)))) (setq hooks (cdr hooks)))))) ;; Find the file's truename, and maybe use that as visited name. ; (setq buffer-file-truename truename) (setq buffer-file-number number) ;; On VMS, we may want to remember which directory in a search list ;; the file was found in. (and (eq system-type 'vax-vms) (let (logical) (if (string-match ":" (file-name-directory filename)) (setq logical (substring (file-name-directory filename) 0 (match-beginning 0)))) (not (member logical find-file-not-true-dirname-list))) (setq buffer-file-name buffer-file-truename)) ; (if find-file-visit-truename ; (setq buffer-file-name ; (setq filename ; (expand-file-name buffer-file-truename)))) ;; Set buffer's default directory to that of the file. (setq default-directory (file-name-directory filename)) ;; Turn off backup files for certain file names. Since ;; this is a permanent local, the major mode won't eliminate it. (and (not (funcall backup-enable-predicate buffer-file-name)) (progn (make-local-variable 'backup-inhibited) (setq backup-inhibited t))) (after-find-file error (not nowarn)))) buf))) (defun after-find-file (&optional error warn noauto) "Called after finding a file and by the default revert function. Sets buffer mode, parses local variables. Optional args ERROR, WARN, and NOAUTO: ERROR non-nil means there was an error in reading the file. WARN non-nil means warn if there exists an auto-save file more recent than the visited file. NOAUTO means don't mess with auto-save mode. Finishes by calling the functions in `find-file-hooks'." (setq buffer-read-only (not (file-writable-p buffer-file-name))) (if noninteractive nil (let* (not-serious (msg (cond ((and error (file-attributes buffer-file-name)) (setq buffer-read-only t) (gettext "File exists, but cannot be read.")) ((not buffer-read-only) (if (and warn (file-newer-than-file-p (make-auto-save-file-name) buffer-file-name)) (gettext "Auto save file is newer; consider M-x recover-file") (setq not-serious t) (if error (gettext "(New file)") nil))) ((not error) (setq not-serious t) (gettext "Note: file is write protected")) ((file-attributes (directory-file-name default-directory)) (gettext "File not found and directory write-protected")) ((file-exists-p (file-name-directory buffer-file-name)) (setq buffer-read-only nil)) (t ;; If the directory the buffer is in doesn't exist, ;; offer to create it. It's better to do this now ;; than when we save the buffer, because we want ;; autosaving to work. (setq buffer-read-only nil) (or (file-exists-p (file-name-directory buffer-file-name)) (if (yes-or-no-p (format (gettext "The directory containing %s does not exist. Create? ") (abbreviate-file-name buffer-file-name))) (make-directory (file-name-directory buffer-file-name) t))) nil)))) (if msg (progn (message msg) (or not-serious (sit-for 1 t))))) (if (and auto-save-default (not noauto)) (auto-save-mode t))) (normal-mode t) (mapcar 'funcall find-file-hooks)) (defun normal-mode (&optional find-file) "Choose the major mode for this buffer automatically. Also sets up any specified local variables of the file. Uses the visited file name, the -*- line, and the local variables spec. This function is called automatically from `find-file'. In that case, we may set up specified local variables depending on the value of `enable-local-variables': if it is t, we do; if it is nil, we don't; otherwise, we query. `enable-local-variables' is ignored if you run `normal-mode' explicitly." (interactive) (or find-file (funcall (or default-major-mode 'fundamental-mode))) (and (condition-case err (progn (set-auto-mode) t) (error (message (gettext "File mode specification error: %s") (prin1-to-string err)) nil)) (condition-case err (hack-local-variables (not find-file)) (error (message (gettext "File local-variables error: %s") (prin1-to-string err)))))) (defvar auto-mode-alist (mapcar 'purecopy '(("\\.te?xt\\'" . text-mode) ("\\.c\\'" . c-mode) ("\\.h\\'" . c-mode) ("\\.tex\\'" . TeX-mode) ("\\.ltx\\'" . LaTeX-mode) ("\\.el\\'" . emacs-lisp-mode) ("\\.mm\\'" . nroff-mode) ("\\.me\\'" . nroff-mode) ("\\.ms\\'" . nroff-mode) ("\\.man\\'" . nroff-mode) ("\\.scm\\'" . scheme-mode) ("\\.l\\'" . lisp-mode) ("\\.lisp\\'" . lisp-mode) ("\\.f\\'" . fortran-mode) ("\\.for\\'" . fortran-mode) ("\\.p\\'" . pascal-mode) ("\\.pas\\'" . pascal-mode) ("\\.mss\\'" . scribe-mode) ;;("\\.pl\\'" . prolog-mode) ("\\.pl\\'" . perl-mode) ("\\.cc\\'" . c++-mode) ("\\.hh\\'" . c++-mode) ("\\.C\\'" . c++-mode) ("\\.H\\'" . c++-mode) ;;; ("\\.mk\\'" . makefile-mode) ;;; ("[Mm]akefile" . makefile-mode) ;;; Less common extensions come here ;;; so more common ones above are found faster. ("\\.texinfo\\'" . texinfo-mode) ("\\.texi\\'" . texinfo-mode) ("\\.s\\'" . asm-mode) ("ChangeLog\\'" . change-log-mode) ("change.log\\'" . change-log-mode) ("changelo\\'" . change-log-mode) ("ChangeLog.[0-9]+\\'" . change-log-mode) ("\\$CHANGE_LOG\\$\\.TXT" . change-log-mode) ;; The following should come after the ChangeLog pattern ;; for the sake of ChangeLog.1, etc. ("\\.[12345678]\\'" . nroff-mode) ("\\.TeX\\'" . TeX-mode) ("\\.sty\\'" . LaTeX-mode) ("\\.bbl\\'" . LaTeX-mode) ("\\.bib\\'" . bibtex-mode) ("\\.article\\'" . text-mode) ("\\.letter\\'" . text-mode) ("\\.tcl\\'" . tcl-mode) ("\\.lsp\\'" . lisp-mode) ("\\.awk\\'" . awk-mode) ("\\.prolog\\'" . prolog-mode) ("\\.tar\\'" . tar-mode) ;; Mailer puts message to be edited in ;; /tmp/Re.... or Message ("^/tmp/Re" . text-mode) ("/Message[0-9]*\\'" . text-mode) ;; some news reader is reported to use this ("^/tmp/fol/" . text-mode) ("\\.y\\'" . c-mode) ("\\.lex\\'" . c-mode) ("\\.oak\\'" . scheme-mode) ("\\.scm.[0-9]*\\'" . scheme-mode) ("\\.html\\'" . html-mode) ("\\.sgm\\'" . sgml-mode) ("\\.sgml\\'" . sgml-mode) ("\\.dtd\\'" . sgml-mode) ("\\.c?ps\\'" . postscript-mode) ;; .emacs following a directory delimiter ;; in either Unix or VMS syntax. ("[]>:/]\\..*emacs\\'" . emacs-lisp-mode) ;; _emacs following a directory delimiter ;; in MsDos syntax ("[:/]_emacs\\'" . emacs-lisp-mode) ("\\.ml\\'" . lisp-mode))) "Alist of filename patterns vs corresponding major mode functions. Each element looks like (REGEXP . FUNCTION) or (REGEXP FUNCTION). Visiting a file whose name matches REGEXP causes FUNCTION to be called. If the element has the form (REGEXP FUNCTION), then after calling FUNCTION, we delete the suffix that matched REGEXP and search the list again for another match.") (defconst interpreter-mode-alist (mapcar 'purecopy '(("perl" . perl-mode) ("scope" . tcl-mode) ("wish" . tcl-mode) ("shell" . tcl-mode) ("form" . tcl-mode) ("tcl" . tcl-mode) ("awk" . awk-mode) ("gawk" . awk-mode) ("scm" . scheme-mode))) "Alist mapping interpreter names to major modes. This alist applies to files whose first line starts with `#!'. 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.") (defconst inhibit-first-line-modes-regexps (purecopy '("\\.tar$")) "List of regexps; if one matches a file name, don't look for `-*-'.") (defun set-auto-mode () "Select major mode appropriate for current buffer. This checks for a -*- mode tag in the buffer's text, 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." (save-excursion ;; Look for -*-MODENAME-*- or -*- ... mode: MODENAME; ... -*- ;; Do this by calling the hack-local-variables helper to avoid redundancy. ;; We bind enable-local-variables to nil this time because we're going to ;; call hack-local-variables-prop-line again later, "for real." (or (let ((enable-local-variables nil)) (hack-local-variables-prop-line nil)) ;; It's not in the -*- line, so check the auto-mode-alist, unless ;; this buffer isn't associated with a file. (null buffer-file-name) (let ((name (file-name-sans-versions buffer-file-name)) (case-fold-search (eq system-type 'vax-vms)) (keep-going t)) (while keep-going (setq keep-going nil) (let ((alist auto-mode-alist) (mode nil)) ;; Find first matching alist entry. (while (and (not mode) alist) (if (string-match (car (car alist)) name) (if (and (consp (cdr (car alist))) (nth 2 (car alist))) (progn (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 (funcall mode) ;; If we can't deduce a mode from the file name, ;; look for an interpreter specified in the first line. (let ((interpreter (save-excursion (goto-char (point-min)) (if (looking-at "#! *") (progn (goto-char (match-end 0)) (buffer-substring (point) (progn (end-of-line) (point)))) ""))) elt) ;; Map interpreter name to a mode. (setq elt (assoc (file-name-nondirectory interpreter) interpreter-mode-alist)) (if elt (funcall (cdr elt))))))))))) (defun hack-local-variables (&optional force) "Parse, and bind or evaluate as appropriate, any local variables for current buffer." ;; Don't look for -*- if this file name matches any ;; of the regexps in inhibit-first-line-modes-regexps. (if (or (null buffer-file-name) ; don't lose if buffer has no file! (not (let ((tem inhibit-first-line-modes-regexps)) (while (and tem (not (string-match (car tem) buffer-file-name))) (setq tem (cdr tem)) tem)))) (progn ;; Look for variables in the -*- line. (hack-local-variables-prop-line force) ;; Look for "Local variables:" block in last page. (hack-local-variables-last-page force)))) ;;; Local variables may be specified in the last page of the file (within 3k ;;; from the end of the file and after the last ^L) in the form ;;; ;;; Local variables: ;;; variable-name: variable-value ;;; end: ;;; ;;; The lines may begin with a common prefix, like ";;; " in the above ;;; example. They may also have a common suffix (" */" for example). In ;;; this form, the local variable "mode" can be used to change the major ;;; mode, and the local variable "eval" can be used to evaluate an arbitrary ;;; form. ;;; ;;; Local variables may also be specified in the first line of the file. ;;; Embedded in this line are a pair of "-*-" sequences. What lies between ;;; them are variable-name/variable-value pairs, like: ;;; ;;; -*- mode: emacs-lisp -*- ;;; or -*- mode: postscript; version-control: never -*- ;;; or -*- tags-file-name: "/foo/bar/TAGS" -*- ;;; ;;; The local variable "eval" is not used with this form. For hysterical ;;; reasons, the syntax "-*- modename -*-" is allowed as well. ;;; (defun hack-local-variables-p (mode-line) (or (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-screen (current-buffer)))))) (or mode-line (save-excursion (beginning-of-line) (set-window-start (selected-window) (point)))) (y-or-n-p (format (gettext "Set local variables as specified %s of %s? ") (if mode-line "in -*- line" "at end") (if buffer-file-name (file-name-nondirectory buffer-file-name) (concat "buffer " (buffer-name))))))))) (defun hack-local-variables-last-page (&optional force) ;; Set local variables set in the "Local Variables:" block of the 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 force (hack-local-variables-p nil)))) (let ((continue t) prefix prefixlen suffix beg (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 (if (looking-at prefix) (forward-char prefixlen) (error (gettext "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 (gettext "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") (skip-chars-forward " \t") (or (if suffix (looking-at suffix) (eolp)) (error (gettext "Local variables entry is terminated incorrectly"))) ;; Set the variable. "Variables" mode and eval are funny. (hack-one-local-variable var val)))))))) (defun hack-local-variables-prop-line (&optional force) ;; Set local variables specified in the -*- line. ;; Returns t if mode was set. (save-excursion (goto-char (point-min)) (skip-chars-forward " \t\n\r") (let ((result nil) (end (save-excursion ;; If the file begins with "#!" ;; (un*x 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))) mode-p) ;; Parse the -*- line into the `result' alist. (cond ((not (search-forward "-*-" end t)) ;; doesn't have one. nil) ((looking-at "[ \t]*\\([^ \t\n\r:;]+\\)\\([ \t]*-\\*-\\)") ;; Antiquated form: "-*- ModeName -*-". (setq result (list (cons 'mode (intern (buffer-substring (match-beginning 1) (match-end 1))))) )) (t ;; Usual form: '-*-' [ ':' ';' ]* '-*-' ;; (last ";" is optional). (save-excursion (if (search-forward "-*-" end t) (setq end (- (point) 3)) (error (gettext "-*- not terminated before end of line")))) (while (< (point) end) (or (looking-at "[ \t]*\\([^ \t\n:]+\\)[ \t]*:[ \t]*") (error (gettext "malformed -*- line"))) (goto-char (match-end 0)) (let ((key (intern (downcase (buffer-substring (match-beginning 1) (match-end 1))))) (val (save-restriction (narrow-to-region (point) end) (read (current-buffer))))) (setq result (cons (cons key val) result)) (skip-chars-forward " \t;"))) (setq result (nreverse result)))) ;; Mode is magic. (let (mode) (while (setq mode (assq 'mode result)) (setq mode-p t result (delq mode result)) (funcall (intern (concat (downcase (symbol-name (cdr mode))) "-mode"))))) (if (and result (or force (hack-local-variables-p t))) (while result (let ((key (car (car result))) (val (cdr (car result)))) ;; 'mode has already been removed from this list. (hack-one-local-variable key val)) (setq result (cdr result)))) mode-p))) (defconst ignored-local-variables (list '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 'eval 'risky-local-variable t) (put 'file-name-handler-alist 'risky-local-variable t) (put 'minor-mode-map-alist 'risky-local-variable t) (put 'after-load-alist 'risky-local-variable t) ;; "Set" one variable in a local variables spec. ;; A few variable names are treated specially. (defun hack-one-local-variable (var val) (cond ((eq var 'mode) (funcall (intern (concat (downcase (symbol-name val)) "-mode")))) ((memq var ignored-local-variables) nil) ;; "Setting" eval means either eval it or do nothing. ;; Likewise for setting hook variables. ((or (get var 'risky-local-variable) (string-match "-hooks?\\'\\|-functions?\\'\\|-forms?\\'" (symbol-name var))) (if (and (not (string= (user-login-name) "root")) (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 file %s? " (file-name-nondirectory buffer-file-name)))))))) (if (eq var 'eval) (save-excursion (eval val)) (make-local-variable var) (set var val)) (message "Ignoring `eval:' in file's local variables"))) ;; Ordinary variable, really set it. (t (make-local-variable var) (set var val)))) (defun set-visited-file-name (filename) "Change name of file visited in current buffer to FILENAME. 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. Remember to delete the initial contents of the minibuffer if you wish to pass an empty string as the argument." (interactive "FSet visited file name: ") (if filename (setq filename (if (string-equal filename "") nil (expand-file-name filename)))) (or (equal filename buffer-file-name) (progn (and filename (lock-buffer filename)) (unlock-buffer))) (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 (gettext "Empty file name"))) (if (eq system-type 'vax-vms) (setq new-name (downcase new-name))) (setq default-directory (file-name-directory buffer-file-name)) (or (string= new-name (buffer-name)) (rename-buffer new-name t)))) (compute-buffer-file-truename) ; insert-file-contents does this too. (setq buffer-backed-up nil) (clear-visited-file-modtime) (if filename (progn ; (setq buffer-file-truename ; (abbreviate-file-name (file-truename buffer-file-name))) ; (if find-file-visit-truename ; (setq buffer-file-name buffer-file-truename)) (setq buffer-file-number (nth 10 (file-attributes buffer-file-name)))) (setq buffer-file-number nil ; buffer-file-truename nil )) ;; write-file-hooks is normally used for things like ftp-find-file ;; that visit things that are not local files as if they were files. ;; Changing to visit an ordinary local file instead should flush the hook. (kill-local-variable 'write-file-hooks) (kill-local-variable 'after-write-file-hooks) ; old name (kill-local-variable 'after-save-hook) ; new name (kill-local-variable 'local-write-file-hooks) (kill-local-variable 'write-file-data-hooks) (kill-local-variable 'revert-buffer-function) (kill-local-variable 'backup-inhibited) ;; If buffer was read-only because of version control, ;; that reason is gone now, so make it writable. (if (and (boundp 'vc-mode) vc-mode) (setq buffer-read-only nil)) (kill-local-variable 'vc-mode) ;; Turn off backup files for certain file names. ;; Since this is a permanent local, the major mode won't eliminate it. (and (not (funcall backup-enable-predicate buffer-file-name)) (progn (make-local-variable 'backup-inhibited) (setq backup-inhibited t))) (let ((oauto buffer-auto-save-file-name)) ;; If auto-save was not already on, turn it on if appropriate. (if (not buffer-auto-save-file-name) (and buffer-file-name auto-save-default (auto-save-mode t)) ;; If auto save is on, start using a new name. ;; We deliberately don't rename or delete the old auto save ;; for the old visited file name. This is because perhaps ;; the user wants to save the new state and then compare with the ;; previous state from the auto save file. (setq buffer-auto-save-file-name (make-auto-save-file-name))) ;; Rename the old auto save file if any. (and oauto buffer-auto-save-file-name (file-exists-p oauto) (rename-file oauto buffer-auto-save-file-name t))) (if buffer-file-name (set-buffer-modified-p t)) ;; #### ?? (run-hooks 'after-set-visited-file-name-hooks)) (defun write-file (filename) "Write current buffer into file FILENAME. Makes buffer visit that file, and marks it not modified. If the buffer is already visiting a file, you can specify a directory name as FILENAME, to write a file of the same old name in that directory." ;; (interactive "FWrite file: ") (interactive (list (if buffer-file-name (read-file-name (gettext "Write file: ") nil nil nil nil) (read-file-name (gettext "Write file: ") (cdr (assq 'default-directory (buffer-local-variables))) nil nil (buffer-name))))) (or (null filename) (string-equal filename "") (progn ;; If arg is just a directory, ;; use same file name, but in that directory. (if (and (file-directory-p filename) buffer-file-name) (setq filename (concat (file-name-as-directory filename) (file-name-nondirectory buffer-file-name)))) (set-visited-file-name filename))) (set-buffer-modified-p t) (save-buffer)) (defun backup-buffer () "Make a backup of the disk file visited by the current buffer, if appropriate. This is normally done before saving the buffer the first time. If the value is non-nil, it is the result of `file-modes' on the original file; this means that the caller, after saving the buffer, should change the modes of the new file to agree with the old modes." (if (and make-backup-files (not backup-inhibited) (not buffer-backed-up) (file-exists-p buffer-file-name) (memq (aref (elt (file-attributes buffer-file-name) 8) 0) '(?- ?l))) (let ((real-file-name buffer-file-name) backup-info backupname targets setmodes) ;; If specified name is a symbolic link, chase it to the target. ;; Thus we make the backups in the directory where the real file is. (setq real-file-name (file-chase-links real-file-name)) (setq backup-info (find-backup-file-name real-file-name) backupname (car backup-info) targets (cdr backup-info)) ;;; (if (file-directory-p buffer-file-name) ;;; (error "Cannot save buffer in directory %s" buffer-file-name)) (condition-case () (let ((delete-old-versions ;; If have old versions to maybe delete, ;; ask the user to confirm now, before doing anything. ;; But don't actually delete til later. (and targets (or (eq trim-versions-without-asking t) (eq trim-versions-without-asking nil)) (or trim-versions-without-asking (y-or-n-p (format (gettext "Delete excess backup versions of %s? ") real-file-name)))))) ;; Actually write the back up file. (condition-case () (if (or file-precious-flag ; (file-symlink-p buffer-file-name) backup-by-copying (and backup-by-copying-when-linked (> (file-nlinks real-file-name) 1)) (and backup-by-copying-when-mismatch (let ((attr (file-attributes real-file-name))) (or (nth 9 attr) (/= (nth 2 attr) (user-uid)))))) (condition-case () (copy-file real-file-name backupname t t) (file-error ;; If copying fails because file BACKUPNAME ;; is not writable, delete that file and try again. (if (and (file-exists-p backupname) (not (file-writable-p backupname))) (delete-file backupname)) (copy-file real-file-name backupname t t))) ;; rename-file should delete old backup. (rename-file real-file-name backupname t) (setq setmodes (file-modes backupname))) (file-error ;; If trouble writing the backup, write it in ~. (setq backupname (expand-file-name "~/%backup%~")) (message (gettext "Cannot write backup file; backing up in ~/%%backup%%~")) (sleep-for 1) (condition-case () (copy-file real-file-name backupname t t) (file-error ;; If copying fails because file BACKUPNAME ;; is not writable, delete that file and try again. (if (and (file-exists-p backupname) (not (file-writable-p backupname))) (delete-file backupname)) (copy-file real-file-name backupname t t))))) (setq buffer-backed-up t) ;; Now delete the old versions, if desired. (if delete-old-versions (while targets (condition-case () (delete-file (car targets)) (file-error nil)) (setq targets (cdr targets)))) setmodes) (file-error nil))))) (defun file-name-sans-versions (name &optional keep-backup-version) "Return FILENAME sans backup versions or strings. This is a separate procedure so your site-init or startup file can redefine it. If the optional argument KEEP-BACKUP-VERSION is non-nil, we do not remove backup version numbers, only true file version numbers." (let ((handler (find-file-name-handler name 'file-name-sans-versions))) (if handler (funcall handler 'file-name-sans-versions name keep-backup-version) (substring name 0 (if (eq system-type 'vax-vms) ;; VMS version number is (a) semicolon, optional ;; sign, zero or more digits or (b) period, option ;; sign, zero or more digits, provided this is the ;; second period encountered outside of the ;; device/directory part of the file name. (or (string-match ";[-+]?[0-9]*\\'" name) (if (string-match "\\.[^]>:]*\\(\\.[-+]?[0-9]*\\)\\'" name) (match-beginning 1)) (length name)) (if keep-backup-version (length name) (or (string-match "\\.~[0-9]+~\\'" name) (string-match "~\\'" name) (length name)))))))) (defun make-backup-file-name (file) "Create the non-numeric backup file name for FILE. This is a separate function so you can redefine it for customization." (if (eq system-type 'ms-dos) (let ((fn (file-name-nondirectory file))) (concat (file-name-directory file) (if (string-match "\\([^.]*\\)\\(\\..*\\)?" fn) (substring fn 0 (match-end 1))) ".bak")) (concat file "~"))) (defun backup-file-name-p (file) "Return non-nil if FILE is a backup file name (numeric or not). This is a separate function so you can redefine it for customization. You may need to redefine `file-name-sans-versions' as well." (if (eq system-type 'ms-dos) (string-match "\\.bak\\'" file) (string-match "~\\'" file))) ;; This is used in various files. ;; The usage of bv-length is not very clean, ;; but I can't see a good alternative, ;; so as of now I am leaving it alone. (defun backup-extract-version (fn) "Given the name of a numeric backup file, return the backup number. Uses the free variable `bv-length', whose value should be the index in the name where the version number begins." (if (and (string-match "[0-9]+~\\'" fn bv-length) (= (match-beginning 0) bv-length)) (string-to-int (substring fn bv-length -1)) 0)) ;; I believe there is no need to alter this behavior for VMS; ;; since backup files are not made on VMS, it should not get called. (defun find-backup-file-name (fn) "Find a file name for a backup file, and suggestions for deletions. Value is a list whose car is the name for the backup file and whose cdr is a list of old versions to consider deleting now." (if (eq version-control 'never) (list (make-backup-file-name fn)) (let* ((base-versions (concat (file-name-nondirectory fn) ".~")) (bv-length (length base-versions)) ; used by backup-extract-version possibilities versions high-water-mark (deserve-versions-p nil) number-to-delete) (condition-case () (setq possibilities (file-name-all-completions base-versions (file-name-directory fn)) versions (sort (mapcar #'backup-extract-version possibilities) #'<) high-water-mark (apply #'max 0 versions) deserve-versions-p (or version-control (> high-water-mark 0)) number-to-delete (- (length versions) kept-old-versions kept-new-versions -1)) (file-error (setq possibilities '()))) (if (not deserve-versions-p) (list (make-backup-file-name fn)) (cons (concat fn ".~" (int-to-string (1+ high-water-mark)) "~") (if (and (> number-to-delete 0) ;; Delete nothing if there is overflow ;; in the number of versions to keep. (>= (+ kept-new-versions kept-old-versions -1) 0)) (mapcar #'(lambda (n) (concat fn ".~" (int-to-string n) "~")) (let ((v (nthcdr kept-old-versions versions))) (rplacd (nthcdr (1- number-to-delete) v) ()) v)))))))) (defun file-nlinks (filename) "Return number of names file FILENAME has." (car (cdr (file-attributes filename)))) (defun file-relative-name (filename &optional directory) "Convert FILENAME to be relative to DIRECTORY (default: default-directory)." (setq filename (expand-file-name filename) directory (file-name-as-directory (if directory (expand-file-name directory) default-directory))) (while directory (let ((up (file-name-directory (directory-file-name directory)))) (cond ((and (string= directory up) (file-name-absolute-p directory)) ;; "/" (setq directory nil)) ((string-match (concat "\\`" (regexp-quote directory)) filename) (setq filename (substring filename (match-end 0))) (setq directory nil)) (t ;; go up one level (setq directory up))))) filename) (defun save-buffer (&optional args) "Save current buffer in visited file if modified. Versions described below. By default, makes the previous version into a backup file if previously requested or if this is the first save. With 1 or 3 \\[universal-argument]'s, marks this version to become a backup when the next save is done. With 2 or 3 \\[universal-argument]'s, unconditionally makes the previous version into a backup file. With argument of 0, never makes 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~. Numeric backups (rather than FOO~) will be made if value of `version-control' is not the atom `never' and either there are already numeric versions of the file being backed up, or `version-control' is non-nil. We don't want excessive versions piling up, so there are variables `kept-old-versions', which tells Emacs how many oldest versions to keep, and `kept-new-versions', which tells how many newest versions to keep. Defaults are 2 old versions and 2 new. `dired-kept-versions' controls dired's clean-directory (.) command. If `trim-versions-without-asking' is nil, system will query user before trimming versions. Otherwise it does it silently." (interactive "p") (let ((modp (buffer-modified-p)) (large (> (buffer-size) 50000)) (make-backup-files (and make-backup-files (not (eq args 0))))) (and modp (memq args '(16 64)) (setq buffer-backed-up nil)) (if (and modp large) (message (gettext "Saving file %s...") (buffer-file-name))) (basic-save-buffer) (and modp (memq args '(4 64)) (setq buffer-backed-up nil)))) (defun delete-auto-save-file-if-necessary (&optional force) "Delete auto-save file for current buffer if `delete-auto-save-files' is t. Normally delete only if the file was written by this Emacs since the last real save, but optional arg FORCE non-nil means delete anyway." (and buffer-auto-save-file-name delete-auto-save-files (not (string= buffer-file-name buffer-auto-save-file-name)) (or force (recent-auto-save-p)) (progn (condition-case () (delete-file buffer-auto-save-file-name) (file-error nil)) (set-buffer-auto-saved)))) ;; Lemacs change (from Sun) ;; used to communicate with continue-save-buffer: (defvar continue-save-buffer-hooks-tail nil) ;; Not in FSFmacs (defun basic-write-file-data (realname) ;; call the hooks until the bytes are put ;; call write-region as a last resort (let ((region-written nil) (hooks write-file-data-hooks)) (while (and hooks (not region-written)) (setq region-written (funcall (car hooks) realname) hooks (cdr hooks))) (if (not region-written) (write-region (point-min) (point-max) realname nil t)))) (defun basic-save-buffer () "Save the current buffer in its visited file, if it has been modified." (interactive) (if (buffer-modified-p) (let ((recent-save (recent-auto-save-p))) ;; On VMS, rename file and buffer to get rid of version number. (if (and (eq system-type 'vax-vms) (not (string= buffer-file-name (file-name-sans-versions buffer-file-name)))) (let (buffer-new-name) ;; Strip VMS version number before save. (setq buffer-file-name (file-name-sans-versions buffer-file-name)) ;; Construct a (unique) buffer name to correspond. (let ((buf (create-file-buffer (downcase buffer-file-name)))) (setq buffer-new-name (buffer-name buf)) (kill-buffer buf)) (rename-buffer buffer-new-name))) ;; If buffer has no file name, ask user for one. (or buffer-file-name (progn ;; >>> why not used set-visited-file-name ? (setq buffer-file-name (expand-file-name (read-file-name (gettext "File to save in: ")) nil) default-directory (file-name-directory buffer-file-name)) (auto-save-mode auto-save-default))) (or (verify-visited-file-modtime (current-buffer)) (not (file-exists-p buffer-file-name)) (yes-or-no-p (format (gettext "%s has changed since visited or saved. Save anyway? ") (file-name-nondirectory buffer-file-name))) (error (gettext "Save not confirmed"))) (save-restriction (widen) (and (> (point-max) 1) (/= (char-after (1- (point-max))) ?\n) (not (and (eq selective-display t) (= (char-after (1- (point-max))) ?\r))) (or (eq require-final-newline t) (and require-final-newline (y-or-n-p (format (gettext "Buffer %s does not end in newline. Add one? ") (buffer-name))))) (save-excursion (goto-char (point-max)) (insert ?\n))) (let ((done nil) ;(tempsetmodes nil) ) ;; ;; Run the write-file-hooks until one returns non-null. ;; Bind after-save-hook/after-write-file-hooks to nil while ;; running the write-file-hooks so that if this function is ;; called recursively (from inside a write-file-hook) the after- ;; hooks will only get run once (from the outermost call.) ;; (let ((hooks (append write-contents-hooks local-write-file-hooks write-file-hooks)) (after-write-file-hooks nil) ; old name (after-save-hook nil) ; new name (local-write-file-hooks nil) (write-contents-hooks nil) (write-file-hooks nil)) (while (and hooks (let ((continue-save-buffer-hooks-tail hooks)) (not (setq done (funcall (car hooks)))))) (setq hooks (cdr hooks)))) ;; If a hook returned t, file is already "written". (if (not done) (basic-save-buffer-1)))) ;; If the auto-save file was recent before this command, ;; delete it now. (delete-auto-save-file-if-necessary recent-save) ;; Now we're done with everything; run the after hooks. (run-hooks 'after-write-file-hooks) ; old name (run-hooks 'after-save-hook) ; new name ) (message (gettext "(No changes need to be saved)")))) ;; This does the "real job" of writing a buffer into its visited file ;; and making a backup file. This is what is normally done ;; but inhibited if one of write-file-hooks returns non-nil. ;; It returns a value to store in setmodes. (defun basic-save-buffer-1 () (let (setmodes tempsetmodes) (if (not (file-writable-p buffer-file-name)) (let ((dir (file-name-directory buffer-file-name))) (if (not (file-directory-p dir)) (error (gettext "%s is not a directory") dir) (if (not (file-exists-p buffer-file-name)) (error (gettext "Directory %s write-protected") dir) (if (yes-or-no-p (format (gettext "File %s is write-protected; try to save anyway? ") (file-name-nondirectory buffer-file-name))) (setq tempsetmodes t) (error (gettext "Attempt to save to a file which you aren't allowed to write"))))))) (or buffer-backed-up (setq setmodes (backup-buffer))) (if file-precious-flag ;; If file is precious, write temp name, then rename it. (let ((dir (file-name-directory buffer-file-name)) (realname buffer-file-name) tempname nogood i succeed) (setq i 0) (setq nogood t) ;; Find the temporary name to write under. (while nogood (setq tempname (format "%s#tmp#%d" dir i)) (setq nogood (file-exists-p tempname)) (setq i (1+ i))) (unwind-protect (progn (clear-visited-file-modtime) (write-region (point-min) (point-max) tempname nil realname) (setq succeed t)) ;; If writing the temp file fails, ;; delete the temp file. (or succeed (delete-file tempname))) ;; Since we have created an entirely new file ;; and renamed it, make sure it gets the ;; right permission bits set. (setq setmodes (file-modes buffer-file-name)) ;; We succeeded in writing the temp file, ;; so rename it. (rename-file tempname buffer-file-name t)) ;; If file not writable, see if we can make it writable ;; temporarily while we write it. ;; But no need to do so if we have just backed it up ;; (setmodes is set) because that says we're superseding. (cond ((and tempsetmodes (not setmodes)) ;; Change the mode back, after writing. (setq setmodes (file-modes buffer-file-name)) (set-file-modes buffer-file-name 511))) (basic-write-file-data buffer-file-name)) (setq buffer-file-number (if buffer-file-name (nth 10 (file-attributes buffer-file-name)) nil)) (if setmodes (condition-case () (set-file-modes buffer-file-name setmodes) (error nil))))) ;; Lemacs change, from Sun (defun continue-save-buffer () "Provide a clean way for a write-file-hook to wrap AROUND the execution of the remaining hooks and writing to disk. Do not call this function except from a functions on the write-file-hooks or write-contents-hooks list. A hook that calls this function must return non-nil, to signal completion to its caller. continue-save-buffer always returns non-nil." (let ((hooks (cdr (or continue-save-buffer-hooks-tail (error (gettext "continue-save-buffer called outside a write-file-hook!"))))) (done nil)) ;; Do something like this: ;; (let ((write-file-hooks hooks)) (basic-save-buffer)) ;; First run the rest of the hooks. (while (and hooks (let ((continue-save-buffer-hooks-tail hooks)) (not (setq done (funcall (car hooks)))))) (setq hooks (cdr hooks))) ;; ;; If a hook returned t, file is already "written". (if (not done) (basic-save-buffer-1)) 'continue-save-buffer)) (defun save-some-buffers (&optional arg exiting) "Save some modified file-visiting buffers. Asks user about each one. Optional argument (the prefix) non-nil means save all with no questions. Optional second argument EXITING means ask about certain non-file buffers as well as about file buffers." (interactive "P") (let ((considered nil) (list (buffer-list))) (while list (let ((buffer (car list))) (and (buffer-modified-p buffer) (not (symbol-value-in-buffer 'save-buffers-skip buffer nil)) (save-excursion (set-buffer buffer) (and (or buffer-file-name (and exiting buffer-offer-save (> (buffer-size) 0))) (setq considered t) (or arg (y-or-n-p (if buffer-file-name (format (gettext "Save file %s? ") buffer-file-name) (format (gettext "Save buffer %s? ") (buffer-name))))) (condition-case () (save-buffer) (error nil)))))) (setq list (cdr list))) (and save-abbrevs abbrevs-changed (progn (setq considered t) (if (or arg (y-or-n-p (format (gettext "Save abbrevs in %s? ") abbrev-file-name))) (write-abbrev-file nil)) ;; Don't keep bothering user if he says no. (setq abbrevs-changed nil))) (if considered (message nil) (message (gettext "(No files need saving)"))))) (defun not-modified (&optional arg) "Mark current buffer as unmodified, not needing to be saved. With prefix arg, mark buffer as modified, so \\[save-buffer] will save." (interactive "_P") (message (if arg (gettext "Modification-flag set") (gettext "Modification-flag cleared"))) (set-buffer-modified-p arg)) (defun toggle-read-only (&optional arg) "Change whether this buffer is visiting its file read-only. With arg, set read-only iff arg is positive." (interactive "_P") (setq buffer-read-only (if (null arg) (not buffer-read-only) (> (prefix-numeric-value arg) 0))) ;; Force mode-line redisplay (set-buffer-modified-p (buffer-modified-p))) (defun insert-file (filename) "Insert contents of file FILENAME into buffer after point. Set mark after the inserted text. This function is meant for the user to run interactively. Don't call it from programs! Use `insert-file-contents' instead. \(Its calling sequence is different; see its documentation)." (interactive "*fInsert file: ") (if (file-directory-p filename) (signal 'file-error (list "Opening input file" "file is a directory" filename))) (let ((tem (insert-file-contents filename))) (push-mark (+ (point) (car (cdr tem)))))) (defun append-to-file (start end filename) "Append the contents of the region to the end of file FILENAME. When called from a function, expects three arguments, START, END and FILENAME. START and END are buffer positions saying what text to write." (interactive "r\nFAppend to file: ") (write-region start end filename t)) (defun file-newest-backup (filename) "Return most recent backup file for FILENAME or nil if no backups exist." (let* ((filename (expand-file-name filename)) (file (file-name-nondirectory filename)) (dir (file-name-directory filename)) (comp (file-name-all-completions file dir)) newest) (while comp (setq file (concat dir (car comp)) comp (cdr comp)) (if (and (backup-file-name-p file) (or (null newest) (file-newer-than-file-p file newest))) (setq newest file))) newest)) (defun rename-uniquely () "Rename current buffer to a similar name not already taken. This function is useful for creating multiple shell process buffers or multiple mail buffers, etc." (interactive) (let* ((new-buf (generate-new-buffer (buffer-name))) (name (buffer-name new-buf))) (kill-buffer new-buf) (rename-buffer name) (set-buffer-modified-p (buffer-modified-p)))) ; force mode line update (defun make-directory-path (path) "Create all the directories along path that don't exist yet." (interactive "Fdirectory path to create: ") (make-directory path t)) (defun make-directory (dir &optional parents) "Create the directory DIR and any nonexistent parent dirs. Interactively, the default choice of directory to create is the current default directory for file names. 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." (interactive (list (let ((current-prefix-arg current-prefix-arg)) (read-directory-name (gettext "Create directory: "))) current-prefix-arg)) (let ((handler (find-file-name-handler dir 'make-directory))) (if handler (funcall handler 'make-directory dir parents) (if (not parents) (make-directory-internal dir) (let ((dir (directory-file-name (expand-file-name dir))) create-list) (while (not (file-exists-p dir)) (setq create-list (cons dir create-list) dir (directory-file-name (file-name-directory dir)))) (while create-list (make-directory-internal (car create-list)) (setq create-list (cdr create-list)))))))) (put 'revert-buffer-function 'permanent-local t) (defvar revert-buffer-function nil "Function to use to revert this buffer, or nil to do the default.") (put 'revert-buffer-insert-file-contents-function 'permanent-local t) (defvar revert-buffer-insert-file-contents-function nil "Function to use to insert contents when reverting this buffer. Gets two args, first the nominal file name to use, and second, t if reading the auto-save file.") (defun revert-buffer (&optional ignore-auto noconfirm) "Replace the buffer text with the text of the visited file on disk. This undoes all changes since the file was visited or saved. With a prefix argument, offer to revert from latest auto-save file, if that is more recent than the visited file. When called from lisp, the first argument is IGNORE-AUTO; only offer to revert from the auto-save file when this is nil. Note that the sense of this argument is the reverse of the prefix argument, for the sake of backward compatibility. IGNORE-AUTO is optional, defaulting to nil. Optional second argument NOCONFIRM means don't ask for confirmation at all. If the value of `revert-buffer-function' is non-nil, it is called to do the work. The default revert function runs the hook `before-revert-hook' at the beginning and `after-revert-hook' at the end." ;; I admit it's odd to reverse the sense of the prefix argument, but ;; there is a lot of code out there which assumes that the first ;; argument should be t to avoid consulting the auto-save file, and ;; there's no straightforward way to encourage authors to notice a ;; reversal of the argument sense. So I'm just changing the user ;; interface, but leaving the programmatic interface the same. (interactive (list (not prefix-arg))) (if revert-buffer-function (funcall revert-buffer-function ignore-auto noconfirm) (let* ((opoint (point)) (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 (gettext "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 (gettext "Buffer does not seem to be associated with any file"))) ((or noconfirm (yes-or-no-p (format (gettext "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)) (let ((buffer-read-only nil) ;; Don't make undo records for the reversion. (buffer-undo-list t)) (if revert-buffer-insert-file-contents-function (funcall revert-buffer-insert-file-contents-function file-name auto-save-p) (if (not (file-exists-p file-name)) (error (gettext "File %s no longer exists!") file-name)) ;; Bind buffer-file-name to nil ;; so that we don't try to lock the file. (let ((buffer-file-name nil)) (or auto-save-p (unlock-buffer))) (widen) (insert-file-contents file-name (not auto-save-p) nil nil t))) (goto-char (min opoint (point-max))) (after-find-file nil nil t) (run-hooks 'after-revert-hook) t))))) (defun recover-file (file) "Visit file FILE, but get contents from its last auto-save file." (interactive (let ((prompt-file buffer-file-name) (file-name nil) (file-dir nil)) (and prompt-file (setq file-name (file-name-nondirectory prompt-file) file-dir (file-name-directory prompt-file))) (list (read-file-name (gettext "Recover file: ") file-dir nil nil file-name)))) (setq file (expand-file-name file)) (if (auto-save-file-name-p file) (error (gettext "%s is an auto-save file") file)) (let ((file-name (let ((buffer-file-name file)) (make-auto-save-file-name)))) (cond ((not (file-newer-than-file-p file-name file)) (error (gettext "Auto-save file %s not current") file-name)) ((save-window-excursion (if (not (eq system-type 'vax-vms)) (with-output-to-temp-buffer (gettext "*Directory*") (buffer-disable-undo standard-output) (call-process "ls" nil standard-output nil (if (file-symlink-p file) "-lL" "-l") file file-name))) (yes-or-no-p (format (gettext "Recover auto save file %s? ") file-name))) (switch-to-buffer (find-file-noselect file t)) (let ((buffer-read-only nil)) (erase-buffer) (insert-file-contents file-name nil)) (after-find-file nil nil t)) (t (error (gettext "Recover-file cancelled.")))))) (defun kill-some-buffers () "For each buffer, ask whether to kill it." (interactive) (let ((list (buffer-list))) (while list (let* ((buffer (car list)) (name (buffer-name buffer))) (and (not (string-equal name "")) (/= (aref name 0) ? ) (yes-or-no-p (format (if (buffer-modified-p buffer) (gettext "Buffer %s HAS BEEN EDITED. Kill? ") (gettext "Buffer %s is unmodified. Kill? ")) name)) (kill-buffer buffer))) (setq list (cdr list))))) (defun auto-save-mode (arg) "Toggle auto-saving of contents of current buffer. With prefix argument ARG, turn auto-saving on if positive, else off." (interactive "P") (setq buffer-auto-save-file-name (and (if (null arg) (not buffer-auto-save-file-name) (or (eq arg t) (listp arg) (and (integerp arg) (> arg 0)))) (if (and buffer-file-name auto-save-visited-file-name (not buffer-read-only)) buffer-file-name (make-auto-save-file-name)))) ;; If -1 was stored here, to temporarily turn off saving, ;; turn it back on. (and (< buffer-saved-size 0) (setq buffer-saved-size 0)) (if (interactive-p) (message (if buffer-auto-save-file-name (gettext "Auto-save on (in this buffer)") (gettext "Auto-save off (in this buffer)")))) buffer-auto-save-file-name) (defun rename-auto-save-file () "Adjust current buffer's auto save file name for current conditions. Also rename any existing auto save file, if it was made in this session." (let ((osave buffer-auto-save-file-name)) (setq buffer-auto-save-file-name (make-auto-save-file-name)) (if (and osave buffer-auto-save-file-name (not (string= buffer-auto-save-file-name buffer-file-name)) (not (string= buffer-auto-save-file-name osave)) (file-exists-p osave) (recent-auto-save-p)) (rename-file osave buffer-auto-save-file-name t)))) ;; see also ../packages/auto-save.el (defun make-auto-save-file-name () "Return file name to use for auto-saves of current buffer. Does not consider `auto-save-visited-file-name' as that variable is checked before calling this function. You can redefine this for customization. See also `auto-save-file-name-p'." (if buffer-file-name (concat (file-name-directory buffer-file-name) "#" (file-name-nondirectory buffer-file-name) "#") ;; ;; For non-file buffer, use buffer name and Emacs pid. ;; (expand-file-name (format "#%s#%s#" (buffer-name) (make-temp-name ""))) ;; jwz: putting the emacs PID in the auto-save file name is bad news, ;; because that defeats auto-save-recovery of *mail* buffers -- the ;; (sensible) code in sendmail.el calls (make-auto-save-file-name) to ;; determine whether there is unsent, auto-saved mail to recover. ;; If that mail came from a previous emacs process (far and away the ;; most likely case) then this can never succeed as the pid differs. ;; Also, replace / with ! so that buffers with / in their names can be ;; saved. (auto-save.el does this more cleverly.) (let ((name (buffer-name))) (while (string-match "/" name) (setq name (concat (substring name 0 (match-beginning 0)) "!" (substring name (match-end 0))))) (expand-file-name (format "#%s#" name))) )) (defun auto-save-file-name-p (filename) "Return non-nil if FILENAME can be yielded by `make-auto-save-file-name'. FILENAME should lack slashes. You can redefine this for customization." (string-match "\\`#.*#\\'" filename)) (defconst list-directory-brief-switches (if (eq system-type 'vax-vms) "" "-CF") "*Switches for list-directory to pass to `ls' for brief listing,") (defconst list-directory-verbose-switches (if (eq system-type 'vax-vms) "/PROTECTION/SIZE/DATE/OWNER/WIDTH=(OWNER:10)" "-l") "*Switches for list-directory to pass to `ls' for verbose listing,") (defun list-directory (dirname &optional verbose) "Display a list of files in or matching DIRNAME, a la `ls'. DIRNAME is globbed by the shell if necessary. Prefix arg (second arg if noninteractive) means supply -l switch to `ls'. Actions controlled by variables `list-directory-brief-switches' and `list-directory-verbose-switches'." (interactive (let ((pfx current-prefix-arg)) (list (read-file-name (if pfx (gettext "List directory (verbose): ") (gettext "List directory (brief): ")) nil default-directory nil) pfx))) (let ((switches (if verbose list-directory-verbose-switches list-directory-brief-switches))) (or dirname (setq dirname default-directory)) (setq dirname (expand-file-name dirname)) (with-output-to-temp-buffer (gettext "*Directory*") (buffer-disable-undo standard-output) (princ (gettext "Directory ")) (princ dirname) (terpri) (save-excursion (set-buffer (gettext "*Directory*")) (let ((wildcard (not (file-directory-p dirname)))) (insert-directory dirname switches wildcard (not wildcard))))))) (defvar insert-directory-program "ls" "Absolute or relative name of the `ls' program used by `insert-directory'.") ;; insert-directory ;; - must insert _exactly_one_line_ describing FILE if WILDCARD and ;; FULL-DIRECTORY-P is nil. ;; The single line of output must display FILE's name as it was ;; given, namely, an absolute path name. ;; - must insert exactly one line for each file if WILDCARD or ;; FULL-DIRECTORY-P is t, plus one optional "total" line ;; before the file lines, plus optional text after the file lines. ;; Lines are delimited by "\n", so filenames containing "\n" are not ;; allowed. ;; File lines should display the basename. ;; - must be consistent with ;; - functions dired-move-to-filename, (these two define what a file line is) ;; dired-move-to-end-of-filename, ;; dired-between-files, (shortcut for (not (dired-move-to-filename))) ;; dired-insert-headerline ;; dired-after-subdir-garbage (defines what a "total" line is) ;; - variable dired-subdir-regexp (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. 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'." (let ((handler (find-file-name-handler file 'insert-directory))) (if handler (funcall handler 'insert-directory file switches wildcard full-directory-p) (if (eq system-type 'vax-vms) (vms-read-directory file switches (current-buffer)) (if wildcard ;; Run ls in the directory of the file pattern we asked for. (let ((default-directory (if (file-name-absolute-p file) (file-name-directory file) (file-name-directory (expand-file-name file)))) (pattern (file-name-nondirectory file)) (beg 0)) ;; Quote some characters that have special meanings in shells; ;; but don't quote the wildcards--we want them to be special. ;; We also currently don't quote the quoting characters ;; in case people want to use them explicitly to quote ;; wildcard characters. ;;>>> Unix-specific (while (string-match "[ \t\n;<>&|{}()#$]" pattern beg) (setq pattern (concat (substring pattern 0 (match-beginning 0)) "\\" (substring pattern (match-beginning 0))) beg (1+ (match-end 0)))) (call-process shell-file-name nil t nil "-c" (concat insert-directory-program " -d " switches " " pattern))) ;; SunOS 4.1.3, SVr4 and others need the "." to list the ;; directory if FILE is a symbolic link. (call-process insert-directory-program nil t nil switches (if full-directory-p (concat (file-name-as-directory file) ;;>>> Unix-specific ".") file))))))) (defvar kill-emacs-query-functions nil "Functions to call with no arguments to query about killing Emacs.") (defun save-buffers-kill-emacs (&optional arg) "Offer to save each buffer, then kill this Emacs process. With prefix arg, silently save all file-visiting buffers, then kill." (interactive "P") (save-some-buffers arg t) (and (or (not (memq t (mapcar #'(lambda (buf) (and (buffer-file-name buf) (buffer-modified-p buf))) (buffer-list)))) (yes-or-no-p (gettext "Modified buffers exist; exit anyway? "))) (or (not (fboundp 'process-list)) ;; process-list is not defined on VMS. (let ((processes (process-list)) active) (while processes (and (memq (process-status (car processes)) '(run stop open)) (let ((val (process-kill-without-query (car processes)))) (process-kill-without-query (car processes) val) val) (setq active t)) (setq processes (cdr processes))) (or (not active) (yes-or-no-p (gettext "Active processes exist; kill them and exit anyway? "))))) ;; Query the user for other things, perhaps. (let ((functions kill-emacs-query-functions) (yes t)) (while (and functions yes) (setq yes (and yes (funcall (car functions)))) (setq functions (cdr functions))) yes) (kill-emacs))) ;;; files.el ends here