In ESS mode, I sometimes send some code to the process buffer and want to cancel it using C-c C-c. Can I do this without actually switching to the process window from the script window?

3 Answers 3


You'll need to write your own function for doing this.

You'll want to read up on the functions get-buffer-process and signal-process to learn about how to send the right signal to the ESS process.

Here is an example: An interactive function that sends a SIGINT to a buffer of your choosing.

You can modify this function to target whatever ESS buffer you want or keep it as is.

(defun interrupt-buffer-process (buffer)
  "Send a SIGINT to BUFFERs process."
  (interactive (list 
                 "Buffer: "
                 (mapcar 'buffer-name (remove-if-not 'get-buffer-process (buffer-list))))))
  (signal-process (get-buffer-process buffer) 'sigint))
  • Thank you very much! That did it!
    – Arktik
    Aug 23, 2019 at 20:46

You can do M-x ess-interrupt.


Sorry not sure how to paste this as a comment, this works for ESS:

(defun my-interrupt-ess-buffer-process ()
  "Send a SIGINT to script's iESS process."
  (signal-process (ess-get-process-buffer) 'sigint))

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