;;; files.el --- file input and output commands for Emacs
-;; Copyright (C) 1985, 1986, 1987, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
-;; 1999, 2000, 2001, 2002, 2003, 2004, 2005 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
(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.
+The value can be t, nil, :safe, or something else.
+
+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.
+\(When you say yes to certain values, they are remembered as safe.)
+
+:safe means set the safe variables, and ignore the rest.
+:all means set all variables, whether safe or not.
+ (Don't set it permanently to :all.)
+nil means always ignore the file local variables.
+
+Any other value means always query you once whether to set them all.
+\(When you say yes to certain values, they are remembered as safe, but
+this has no effect when `enable-local-variables' is \"something else\".)
+
This variable also controls use of major modes specified in
a -*- line.
The command \\[normal-mode], when used interactively,
always obeys file local variable specifications and the -*- line,
and ignores this variable."
- :type '(choice (const :tag "Obey" t)
+ :type '(choice (const :tag "Query Unsafe" t)
+ (const :tag "Safe Only" :safe)
+ (const :tag "Do all" :all)
(const :tag "Ignore" nil)
(other :tag "Query" other))
:group 'find-file)
(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)
(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'.")
Interactively, or if WILDCARDS is non-nil in a call from Lisp,
expand wildcards (if any) and visit multiple files. You can
-suppress wildcard expansion by setting `find-file-wildcards'.
+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]."
(defun find-file-existing (filename &optional wildcards)
"Edit the existing file FILENAME.
-Like \\[find-file] but only allow files that exists."
+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)
(not (or buf nowarn))
(> (nth 7 attributes) large-file-warning-threshold)
(not (y-or-n-p
- (format "File %s is large (%sMB), really open? "
+ (format "File %s is large (%dMB), really open? "
(file-name-nondirectory filename)
(/ (nth 7 attributes) 1048576)))))
(error "Aborted"))
This function is called automatically from `find-file'. In that case,
we may set up the file-specified mode and 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.
+depending on the value of `enable-local-variables'.
In addition, if `local-enable-local-variables' is nil, we do
not set local variables (though we do notice a mode specified with -*-.)
("\\.ad[abs]\\'" . ada-mode)
("\\.ad[bs].dg\\'" . ada-mode)
("\\.\\([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)
;; `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]\\'" . archive-mode) ; OpenOffice.org
+ ("\\.\\(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)
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 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 "*-->\\s *<\\)")))
- (concat "\\(?:<\\?xml\\s +[^>]*>\\)?\\s *<"
+ (comment-re (concat "\\(?:!--" incomment-re "*-->[ \t\n]*<\\)")))
+ (concat "\\(?:<\\?xml[ \t\n]+[^>]*>\\)?[ \t\n]*<"
comment-re "*"
- "\\(?:!DOCTYPE\\s +[^>]*>\\s *<\\s *" 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 "*-->\\s *<\\)")))
- (concat "\\s *<" comment-re "*!DOCTYPE "))
+ (comment-re (concat "\\(?:!--" incomment-re "*-->[ \t\n]*<\\)")))
+ (concat "[ \t\n]*<" comment-re "*!DOCTYPE "))
. sgml-mode)
("%![^V]" . ps-mode)
("# xmcd " . conf-unix-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.
(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)))))
+ (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.
(unless done
(if (setq done (save-excursion
(goto-char (point-min))
- (assoc-default nil magic-mode-alist
- (lambda (re dummy)
- (looking-at re)))))
+ (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
(setq end (point))
(goto-char beg)
end))))
+\f
+;;; Handling file local variables
-(defun hack-local-variables-confirm (string flag-to-check)
- (or (eq flag-to-check t)
- (and flag-to-check
- (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 or dedicated window.
- ;; So try another window.
- (let ((pop-up-frames nil))
- ;; Refrain from popping up frames since it can't
- ;; be undone by save-window-excursion.
- (pop-to-buffer (current-buffer)))))
- (save-excursion
- (beginning-of-line)
- (set-window-start (selected-window) (point)))
- (y-or-n-p (format string
- (if buffer-file-name
- (file-name-nondirectory buffer-file-name)
- (concat "buffer " (buffer-name)))))))))
+(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
+ enable-local-variables
+ 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
+ safe-local-variable-values
+ safe-local-eval-forms
+ 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 . booleanp)
+ (byte-compile-dynamic-docstrings . booleanp)
+ (byte-compile-warnings . booleanp)
+ (c-basic-offset . integerp)
+ (c-file-style . stringp)
+ (c-indent-level . integerp)
+ (comment-column . integerp)
+ (compile-command . string-or-null-p)
+ (find-file-visit-truename . booleanp)
+ (fill-column . integerp)
+ (fill-prefix . string-or-null-p)
+ (indent-tabs-mode . booleanp) ;; C source code
+ (kept-old-versions . integerp)
+ (kept-new-versions . integerp)
+ (left-margin . integerp)
+ (no-byte-compile . booleanp)
+ (no-update-autoloads . booleanp)
+ (outline-regexp . string-or-null-p)
+ (tab-width . integerp) ;; C source code
+ (truncate-lines . booleanp) ;; C source code
+ (version-control . symbolp)))))
+
+(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 ((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))))))
+ (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
- (hack-local-variables-confirm
- "Set local variables as specified in -*- line of %s? "
- enable-local-variables)))
- (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)
- (when (let ((case-fold-search t))
- (and (search-forward "Local Variables:" nil t)
- (or mode-only
- (hack-local-variables-confirm
- "Set local variables as specified at end of %s? "
- enable-local-variables))))
- (skip-chars-forward " \t")
- (let ((enable-local-eval enable-local-eval)
- ;; suffix is what comes after "local variables:" in its line.
- (suffix
- (concat
- (regexp-quote (buffer-substring (point) (line-end-position)))
- "$"))
- ;; prefix is what comes before "local variables:" in its line.
- (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)
- (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")
- (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 mode-specified t))
- ;; Set the variable. "Variables" mode and eval are funny.
- (with-current-buffer thisbuf
- (hack-one-local-variable var val))))
- (forward-line 1)))))))
- (unless mode-only
- (run-hooks 'hack-local-variables-hook))
- mode-specified))
-
-(defvar ignored-local-variables ()
- "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 &optional val)
- "Non-nil if SYM could be dangerous as a file-local variable with value VAL.
-If VAL is nil or omitted, the question is whether any value might be
-dangerous."
- (let ((safep (get sym 'safe-local-variable)))
- (or (get sym 'risky-local-variable)
- (and (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$"
- (symbol-name sym))
- (not safep))
- ;; If the safe-local-variable property isn't t or nil,
- ;; then it must return non-nil on the proposed value to be safe.
- (and (not (memq safep '(t nil)))
- (or (null val)
- (not (funcall safep val)))))))
-
-(defcustom safe-local-eval-forms nil
- "*Expressions that are considered \"safe\" in an `eval:' local variable.
-Add expressions to this list if you want Emacs to evaluate them, when
-they appear in an `eval' local variable specification, without first
-asking you for confirmation."
- :group 'find-file
- :version "22.1"
- :type '(repeat sexp))
-
-(put 'c-set-style 'safe-local-eval-function t)
+ (let ((enable-local-variables
+ (and local-enable-local-variables enable-local-variables))
+ result)
+ (when (or mode-only enable-local-variables)
+ (setq result (hack-local-variables-prop-line mode-only))
+ ;; Look for "Local variables:" line in last page.
+ (save-excursion
+ (goto-char (point-max))
+ (search-backward "\n\^L" (max (- (point-max) 3000) (point-min))
+ 'move)
+ (when (let ((case-fold-search t))
+ (search-forward "Local Variables:" nil t))
+ (skip-chars-forward " \t")
+ ;; suffix is what comes after "local variables:" in its line.
+ ;; prefix is what comes before "local variables:" in its line.
+ (let ((suffix
+ (concat
+ (regexp-quote (buffer-substring (point)
+ (line-end-position)))
+ "$"))
+ (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)
+ (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")
+ (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 (eq enable-local-variables :safe)
+ ;; If caller wants only the safe variables,
+ ;; install only them.
+ (dolist (elt result)
+ (unless (or (memq (car elt) unsafe-vars)
+ (memq (car elt) risky-vars))
+ (hack-one-local-variable (car elt) (cdr elt))))
+ ;; Query, except in the case where all are known safe
+ ;; if the user wants no quuery in that case.
+ (if (or (and (eq enable-local-variables t)
+ (null unsafe-vars)
+ (null risky-vars))
+ (eq enable-local-variables :all)
+ (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 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)))
+ (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))))
(and (eq (car exp) 'put)
(hack-one-local-variable-quotep (nth 1 exp))
(hack-one-local-variable-quotep (nth 2 exp))
- (memq (nth 1 (nth 2 exp))
- '(lisp-indent-hook))
- ;; Only allow safe values of lisp-indent-hook;
- ;; not functions.
- (or (numberp (nth 3 exp))
- (equal (nth 3 exp) ''defun)))
+ (let ((prop (nth 1 (nth 2 exp))) (val (nth 3 exp)))
+ (cond ((eq prop 'lisp-indent-hook)
+ ;; Only allow safe values of lisp-indent-hook;
+ ;; not functions.
+ (or (numberp val) (equal val ''defun)))
+ ((eq prop 'edebug-form-spec)
+ ;; Only allow indirect form specs.
+ (edebug-basic-spec val)))))
;; Allow expressions that the user requested.
(member exp safe-local-eval-forms)
;; Certain functions can be allowed with safe arguments
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)
- ((memq var ignored-local-variables)
- 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)))
- (hack-local-variables-confirm
- "Process `eval' or hook local variables in %s? "
- enable-local-eval)))
- (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.
-FILENAME nil or an empty string 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.
(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.
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
ancestor))))))
\f
(defun save-buffer (&optional args)
- "Save current buffer in visited file if modified. Variations are 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.
Prefixed with one \\[universal-argument], marks this version
;; 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)
(?d diff-buffer-with-file
"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.")
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'.
(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))
+ (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)
(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
- (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))
- ;; 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)
- (let ((coding-system-for-read
- ;; Auto-saved file shoule be read by Emacs'
- ;; internal coding.
- (if auto-save-p 'auto-save-coding
- (or coding-system-for-read
- 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)
-
- ;; Note that this preserves point in an intelligent way.
- (if preserve-modes
- (let ((buffer-file-format buffer-file-format))
- (insert-file-contents file-name (not auto-save-p)
- nil nil t))
- (insert-file-contents file-name (not auto-save-p)
- nil nil t)))))
+ (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)))
+ ((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))
+ (or auto-save-p
+ (unlock-buffer)))
+ (widen)
+ (let ((coding-system-for-read
+ ;; 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-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)
+
+ ;; Note that this preserves point in an intelligent way.
+ (if preserve-modes
+ (let ((buffer-file-format buffer-file-format))
+ (insert-file-contents file-name (not auto-save-p)
+ 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
(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
+ (if local-hook
(set (make-local-variable 'revert-buffer-internal-hook)
local-hook)
(kill-local-variable 'revert-buffer-internal-hook))
(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 with special coding.
(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