How to gracefully shutdown emacs daemon? [closed]

问题

On login to Ubuntu, I start an Emacs (version 23) daemon using Ubuntu's Startup programs. I then start Emacs clients whenever I need to edit something. When I logoff from Ubuntu, it says Emacs is still running, of course. I need to attach a script somewhere to tell Gnome to shutdown emacs when I logoff/shutdown.

1) What should the script look like? "kill-emacs" doesn't seem to work.

2) Where should I put this script? There's nothing in the startup programs (System->Sessions menu) panel that looks useful. I'd prefer something that works in the user's account, rather than hacking the PostSession script or something else with root access.

回答1:

This linuxquestions.org page has a Python script that can be run during login that listens for the 'save yourself' event that Gnome emits during shutdown. You could modify that to do the:

emacsclient -e '(save-buffers-kill-emacs)'

Official docs: https://www.emacswiki.org/emacs/EmacsAsDaemon#toc8

回答2:

ShreevatsaR is right, the answer is kill-emacs or save-buffers-kill-emacs, both of which are interactive, and so can be run from within Emacs with M-x save-buffers-kill-emacs. This is probably the best way to do it, since you will get to save modified files.

Another alternative is to make a shell file like this:

#!/bin/bash
emacsclient -e "(kill-emacs)"

Which you can run from wherever you like (menu icon, panel, etc).

回答3:

Another addendum to ShreevatsaR: the python script works like a charm, but I'd suggest using

emacsclient -e '(let ((last-nonmenu-event nil))(save-buffers-kill-emacs))'

as command. Setting last-nonmenu-event to nil forces emacs into mouse-mode, so you get "nice" dialog boxes instead of prompts in the minibuffer.

Or even more fancy (somewhere in your emacs config):

(defun shutdown-emacs-server () (interactive)
  (when (not (eq window-system 'x))
    (message "Initializing x windows system.")
    (x-initialize-window-system)
    (when (not x-display-name) (setq x-display-name (getenv "DISPLAY")))
    (select-frame (make-frame-on-display display '((window-system . x))))
  )
  (let ((last-nonmenu-event nil)(window-system "x"))(save-buffers-kill-emacs)))

and then:

emacsclient -e '(shutdown-emacs-server)'

回答4:

I think that using a script in /etc/init.d is a cleaner solution. Check here for more details http://www.emacswiki.org/emacs/EmacsAsDaemon

回答5:

If you use systemd you may be interested in this unit file that lets you manage an Emacs server gracefully from within your console/remote system:

[Unit]
Description=Emacs: the extensible, self-documenting text editor

[Service]
Type=forking
ExecStart=/usr/bin/emacs --daemon
ExecStop=/usr/bin/emacsclient --eval "(kill-emacs)"
Restart=always

# Remove the limit in startup timeout, since emacs
# cloning and building all packages can take time
TimeoutStartSec=0

[Install]
WantedBy=default.target

(it kills the daemon in the same way folks already suggested above.)

You could put and name the unit file like ~/.config/systemd/user/emacs.service so it's bind to your user instead running it as root; to manage it:

$ systemctl --user {enable,disable,start,restart,stop} emacs.service

Please note: I took this note from somewhere else, can't remember where though.

回答6:

the answer from willert contains a small bug. it must look like


(defun shutdown-emacs-server () (interactive)
  (when (not (eq window-system 'x))
    (message "Initializing x windows system.")
    (x-initialize-window-system)
    (when (not x-display-name) (setq x-display-name (getenv "DISPLAY")))
    (select-frame (make-frame-on-display x-display-name '((window-system . x))))
  )
  (let ((last-nonmenu-event nil)(window-system "x"))(save-buffers-kill-emacs)))

回答7:

you can put emacsclient -e "(kill-emacs)" in GDM's PostSession directory or directly in the Default script:

/etc/gdm/PostSession/Default

回答8:

Perhaps the most general solution would be to put a script in the system PostSession directory that runs every executable script in ~/.logout-d, or something similar. Then you can put whatever scripts you like in ~/.logout-d, and they will be run on logout.

The script might be as simple as run-parts ~/.logout.d.

Note: Untested, though I do use a startup script that does run-parts ~/.autostart.d, and that's been working fine forever.

Edit: Of course, it would be just as easy to modify the above python script to execute that same command, but I personally don't like the idea of loading a script for my entire session just to run commands on logout.

回答9:

Just open some terminal and pkill -TERM emacs

来源：https://stackoverflow.com/questions/1167484/how-to-gracefully-shutdown-emacs-daemon

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emacs

Ubuntu

emacs23