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How can I execute elisp in the currently running emacs from the command line?

The following command echoes 'hi' but doesn't set 'abc in the emacs instance.

emacsclient --no-wait --eval '(message "hi") (setq abc)'

Is there a way to modify emacs from the command line?

My specific use case is to revert all buffers with a shell command.

1 Answer 1

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You can either wrap your two forms in a progn:

emacsclient --no-wait --eval '(progn (message "hi") (setq abc 123))'

Or you can send them separately:

emacsclient --no-wait --eval '(message "hi")' '(setq def 456)'
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  • I don't think the quoting matters. Either way, abc is not defined in emacs. The goal is for abc to be defined in the currently open emacs.
    – Joe
    Aug 3, 2016 at 3:55
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    I just tried it and both of the options listed work on my machine. You're sure you've got the server running?
    – Dan
    Aug 3, 2016 at 13:34
  • Ah, I had a zombie emacs process that was intercepting emacsclient. It now works like a charm
    – Joe
    Aug 4, 2016 at 3:13

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