Kill process buffer without confirmation?

Question

I have C-x C-k bound to kill-this-buffer. But when I enter into a buffer which is running a process like Python or MySQL, if I do C-x C-k it asks

Buffer "*Python*" has a running process; kill it (y or n)?

How can I kill process buffers without confirmation?

Answer 1

Remove the corresponding function from the relevant variable :

(setq kill-buffer-query-functions (delq 'process-kill-buffer-query-function kill-buffer-query-functions))

How did I find this ?

kill-this-buffer uses kill-buffer internally, which references the variable kill-buffer-query-functions.

Answer 2

Or the simpler one would be :

(setq kill-buffer-query-functions nil)

Inspired from abo-abo config

Answer 3

This will not affect the global variable scope

(let ((kill-buffer-query-functions nil))
  (kill-buffer "*Python*"))

Answer 4

The answers here solve the question but for completness I will show my solution based on YoungFrog answer which in my opinion leads to a problematic state where no more confirmation will be asked for any process buffer killing.

Context

I just want to be able to kill *ansi-term-1* buffer with no confirmation :

(defun perso/close-shell ()

  ;; remove confirmation for process buffers
  (setq kill-buffer-query-functions
    (delq 'process-kill-buffer-query-function kill-buffer-query-functions))

  (kill-buffer "*ansi-term-1*")

  ;; confirmation is now active for other process buffer
  (add-to-list 'kill-buffer-query-functions 'process-kill-buffer-query-function))

and revert to the previous state where confirmation is asked for other process buffers.

Answer 5

(defun custom-kill-buffer-no-confirm (&optional arg)
  (interactive "P")
  "Kill current buffer unconditionally."
  (set-buffer-modified-p nil)
  (kill-buffer (current-buffer)))