2021-04-19 12:21:01 +02:00
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;;; old-emacs-lock.el --- prevents you from exiting Emacs if a buffer is locked -*- lexical-binding: t; -*-
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2011-07-05 13:38:44 +02:00
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2021-01-01 01:13:56 -08:00
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;; Copyright (C) 1994, 1997, 2001-2021 Free Software Foundation, Inc.
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2011-07-05 13:38:44 +02:00
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;; Author: Tom Wurgler <twurgler@goodyear.com>
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;; Created: 12/8/94
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;; Keywords: extensions, processes
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;; Obsolete-since: 24.1
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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2017-09-13 15:52:52 -07:00
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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2011-07-05 13:38:44 +02:00
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;;; Commentary:
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;; This code sets a buffer-local variable to t if toggle-emacs-lock is run,
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;; then if the user attempts to exit Emacs, the locked buffer name will be
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;; displayed and the exit aborted. This is just a way of protecting
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;; yourself from yourself. For example, if you have a shell running a big
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;; program and exiting Emacs would abort that program, you may want to lock
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;; that buffer, then if you forget about it after a while, you won't
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;; accidentally exit Emacs. To unlock the buffer, just goto the buffer and
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;; run toggle-emacs-lock again.
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;;; Code:
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(defvar emacs-lock-from-exiting nil
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"Whether Emacs is locked to prevent exiting. See `check-emacs-lock'.")
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(make-variable-buffer-local 'emacs-lock-from-exiting)
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(defvar emacs-lock-buffer-locked nil
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"Whether a shell or telnet buffer was locked when its process was killed.")
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(make-variable-buffer-local 'emacs-lock-buffer-locked)
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(put 'emacs-lock-buffer-locked 'permanent-local t)
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(defun check-emacs-lock ()
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"Check if variable `emacs-lock-from-exiting' is t for any buffer.
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If any locked buffer is found, signal error and display the buffer's name."
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(save-excursion
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(dolist (buffer (buffer-list))
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(set-buffer buffer)
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(when emacs-lock-from-exiting
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(error "Emacs is locked from exit due to buffer: %s" (buffer-name))))))
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(defun toggle-emacs-lock ()
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"Toggle `emacs-lock-from-exiting' for the current buffer.
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See `check-emacs-lock'."
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(interactive)
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(setq emacs-lock-from-exiting (not emacs-lock-from-exiting))
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(if emacs-lock-from-exiting
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(message "Buffer is now locked")
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(message "Buffer is now unlocked")))
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(defun emacs-lock-check-buffer-lock ()
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"Check if variable `emacs-lock-from-exiting' is t for a buffer.
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If the buffer is locked, signal error and display its name."
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(when emacs-lock-from-exiting
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(error "Buffer `%s' is locked, can't delete it" (buffer-name))))
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; These next defuns make it so if you exit a shell that is locked, the lock
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; is shut off for that shell so you can exit Emacs. Same for telnet.
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; Also, if a shell or a telnet buffer was locked and the process killed,
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; turn the lock back on again if the process is restarted.
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(defun emacs-lock-shell-sentinel ()
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(set-process-sentinel
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(get-buffer-process (buffer-name)) (function emacs-lock-clear-sentinel)))
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(defun emacs-lock-clear-sentinel (_proc _str)
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(if emacs-lock-from-exiting
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(progn
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(setq emacs-lock-from-exiting nil)
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(setq emacs-lock-buffer-locked t)
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(message "Buffer is now unlocked"))
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(setq emacs-lock-buffer-locked nil)))
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(defun emacs-lock-was-buffer-locked ()
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(if emacs-lock-buffer-locked
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(setq emacs-lock-from-exiting t)))
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(unless noninteractive
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* lisp/obsolete: Use lexical-binding
Use lexical-binding in all the lisp/obsolete/*.el files.
While at it, removed redundant :group arguments and used #' to quote
functions. Commented out the key bindings which the #' revealed
to lead to non-existing commands, and replaced those revealed to be obsolete.
* lisp/obsolete/cl-compat.el: Use cl-lib.
* lisp/obsolete/cust-print.el: Assume `defalias` exists.
(with-custom-print): Use `declare`.
* lisp/obsolete/iswitchb.el (iswitchb-init-XEmacs-trick)
(iswitchb-xemacs-backspacekey): Remove functions.
* lisp/obsolete/landmark.el (landmark, landmark-nslify-wts):
Prefer `apply` to `eval`.
* lisp/obsolete/longlines.el (longlines-mode): Don't use `add-to-list`
on a hook.
* lisp/obsolete/pgg-gpg.el (pgg-gpg-process-region): Use `clear-string`.
* lisp/obsolete/pgg-pgp.el (pgg-pgp-encrypt-region): Remove oddly
unused var `passphrase`.
(pgg-pgp-verify-region): Declare var `jam-zcat-filename-list`.
* lisp/obsolete/pgg-pgp5.el (pgg-pgp5-encrypt-region): Remove oddly
unused var `passphrase`.
(pgg-pgp5-verify-region): Declare var `jam-zcat-filename-list`.
* lisp/obsolete/pgg.el: Remove some XEmacs compatibility code.
(pgg-run-at-time, pgg-cancel-timer, pgg-clear-string): Remove functions.
Use their core equivalent instead.
* lisp/obsolete/rcompile.el (remote-compile): Remove unused vars `l`,
`l-host`, `l-user`, and `localname`.
* lisp/obsolete/starttls.el (starttls-any-program-available):
Use `define-obsolete-function-alias`.
* lisp/obsolete/tls.el (tls-format-message): Delete function, use
`format-message` instead.
* lisp/obsolete/url-ns.el (url-ns-prefs): Use `with-current-buffer`
and `dlet`.
* lisp/obsolete/vip.el (vip-escape-to-emacs): Remove unused var `key`.
(vip-command-argument, vip-read-string, ex-delete, ex-line): Remove
unused var `conditions`.
(ex-map): Use a closure instead of `eval`.
(ex-set): Make it an alias of `set-variable`.
(ex-substitute): Remove unused var `cont`.
* lisp/obsolete/abbrevlist.el:
* lisp/obsolete/bruce.el:
* lisp/obsolete/cc-compat.el:
* lisp/obsolete/cl-compat.el:
* lisp/obsolete/cl.el:
* lisp/obsolete/complete.el:
* lisp/obsolete/crisp.el:
* lisp/obsolete/cust-print.el:
* lisp/obsolete/erc-compat.el:
* lisp/obsolete/erc-hecomplete.el:
* lisp/obsolete/eudcb-ph.el:
* lisp/obsolete/fast-lock.el:
* lisp/obsolete/gs.el:
* lisp/obsolete/gulp.el:
* lisp/obsolete/html2text.el:
* lisp/obsolete/info-edit.el:
* lisp/obsolete/iswitchb.el:
* lisp/obsolete/landmark.el:
* lisp/obsolete/lazy-lock.el:
* lisp/obsolete/longlines.el:
* lisp/obsolete/mailpost.el:
* lisp/obsolete/mantemp.el:
* lisp/obsolete/meese.el:
* lisp/obsolete/messcompat.el:
* lisp/obsolete/metamail.el:
* lisp/obsolete/mouse-sel.el:
* lisp/obsolete/nnir.el:
* lisp/obsolete/old-emacs-lock.el:
* lisp/obsolete/otodo-mode.el:
* lisp/obsolete/patcomp.el:
* lisp/obsolete/pc-mode.el:
* lisp/obsolete/pc-select.el:
* lisp/obsolete/pgg-def.el:
* lisp/obsolete/pgg-gpg.el:
* lisp/obsolete/pgg-parse.el:
* lisp/obsolete/pgg-pgp.el:
* lisp/obsolete/pgg-pgp5.el:
* lisp/obsolete/pgg.el:
* lisp/obsolete/rcompile.el:
* lisp/obsolete/s-region.el:
* lisp/obsolete/sb-image.el:
* lisp/obsolete/sregex.el:
* lisp/obsolete/starttls.el:
* lisp/obsolete/sup-mouse.el:
* lisp/obsolete/terminal.el:
* lisp/obsolete/tls.el:
* lisp/obsolete/tpu-edt.el:
* lisp/obsolete/tpu-extras.el:
* lisp/obsolete/tpu-mapper.el:
* lisp/obsolete/url-ns.el:
* lisp/obsolete/vc-arch.el:
* lisp/obsolete/vi.el:
* lisp/obsolete/vip.el:
* lisp/obsolete/ws-mode.el:
* lisp/obsolete/yow.el: Use lexical-binding.
2021-02-22 16:54:59 -05:00
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(add-hook 'kill-emacs-hook #'check-emacs-lock))
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(add-hook 'kill-buffer-hook #'emacs-lock-check-buffer-lock)
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(add-hook 'shell-mode-hook #'emacs-lock-was-buffer-locked)
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(add-hook 'shell-mode-hook #'emacs-lock-shell-sentinel)
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(add-hook 'telnet-mode-hook #'emacs-lock-was-buffer-locked)
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(add-hook 'telnet-mode-hook #'emacs-lock-shell-sentinel)
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2011-07-05 13:38:44 +02:00
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(provide 'emacs-lock)
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2021-04-19 12:21:01 +02:00
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;;; old-emacs-lock.el ends here
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