Does Emacs allow it to implement POSIX signal handling in Lisp?
Specifically, I would like to handle SIGTERM to finish desktop-mode related things.
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1As far as I know the answer is "no", but you could try DBus signals: gnu.org/software/emacs/manual/html_node/dbus/Signals.html if that's a feasible option. – wvxvw Mar 1 '15 at 12:40
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It indeed looks like a feasible option. Thanks for pointing it out. – Andreas Steffan Mar 3 '15 at 14:30
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There's special-event-map which can be used to handle signals among other things, you can bind a key like [sigusr2] there to a function you'd like to be executed on the respective signal. I'm not so sure whether it works on anything else than SIGUSR1 and SIGUSR2 though.
edit: Here's an useful example of how one could use it:
(defun my-quit-emacs-unconditionally ()
(interactive)
(save-some-buffers t t)
(kill-emacs))
(define-key special-event-map (kbd "<sigusr1>") 'my-quit-emacs-unconditionally)
