mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-23 07:19:15 +00:00
69 lines
2.5 KiB
EmacsLisp
69 lines
2.5 KiB
EmacsLisp
;;; emacs-lock.el --- prevents you from exiting emacs if a buffer is locked
|
|
|
|
;; Copyright (C) 1994 Free Software Foundation, Inc
|
|
|
|
;; Author: Tom Wurgler <twurgler@goodyear.com>
|
|
;; Created: 12/8/94
|
|
;; Version: 1.3
|
|
;; Keywords:
|
|
|
|
;; 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, Inc., 59 Temple Place - Suite 330,
|
|
;; Boston, MA 02111-1307, USA.
|
|
|
|
;;; Commentary:
|
|
|
|
;; This code sets a buffer-local variable to t if toggle-emacs-lock is run,
|
|
;; then if the user attempts to exit emacs, the locked buffer name will be
|
|
;; displayed and the exit aborted. This is just a way of protecting
|
|
;; yourself from yourself. For example, if you have a shell running a big
|
|
;; program and exiting emacs would abort that program, you may want to lock
|
|
;; that buffer, then if you forget about it after a while, you won't
|
|
;; accidentally exit emacs. To unlock the buffer, just goto the buffer and
|
|
;; run toggle-emacs-lock again.
|
|
|
|
;;; Code:
|
|
|
|
(defvar lock-emacs-from-exiting nil
|
|
"Whether emacs is locked to prevent exiting. See `check-emacs-lock'.")
|
|
(make-variable-buffer-local 'lock-emacs-from-exiting)
|
|
|
|
(defun check-emacs-lock ()
|
|
"Check if variable `lock-emacs-from-exiting' is t for any buffer.
|
|
If any t is found, signal error and display the locked buffer name."
|
|
(let ((buffers (buffer-list)))
|
|
(save-excursion
|
|
(while buffers
|
|
(set-buffer (car buffers))
|
|
(if lock-emacs-from-exiting
|
|
(error "Emacs is locked from exit due to buffer: %s" (buffer-name))
|
|
(setq buffers (cdr buffers)))))))
|
|
|
|
(defun toggle-emacs-lock ()
|
|
"Toggle `lock-emacs-from-exiting' between t and nil for the current buffer.
|
|
See `check-emacs-lock'."
|
|
(interactive)
|
|
(if lock-emacs-from-exiting
|
|
(setq lock-emacs-from-exiting nil)
|
|
(setq lock-emacs-from-exiting t))
|
|
(if lock-emacs-from-exiting
|
|
(message "Emacs is now locked from exiting.")
|
|
(message "Emacs is now unlocked.")))
|
|
|
|
(add-hook 'kill-emacs-hook 'check-emacs-lock)
|
|
|
|
;; emacs-lock.el ends here
|