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Re: make emacs ask to save modified non-file buffers

From: Juanma Barranquero
Subject: Re: make emacs ask to save modified non-file buffers
Date: Mon, 23 Jun 2008 10:48:40 +0200

On Mon, Jun 23, 2008 at 02:23, Xah <address@hidden> wrote:

> according to the manual, the var buffer-offer-save will do it only if
> the buffer is a visiting buffer.

Uh? describe-variable's output for `buffer-offer-save':

  Non-nil in a buffer means always offer to save buffer on exit.
  Do so even if the buffer is not visiting a file.    <--- ???????

and the Emacs Lisp Reference's entry for `buffer-offer-save':

 -- Variable: buffer-offer-save
     This variable, if non-`nil' in a particular buffer, tells
     `save-buffers-kill-emacs' and `save-some-buffers' (if the second
     optional argument to that function is `t') to offer to save that
     buffer, just as they offer to save file-visiting buffers.   <--- ???????

The problem here is that `buffer-offer-save' affects the two functions
mentioned above (`save-buffers-kill-emacs' and `save-some-buffers'),
not `kill-buffer'. As Lennart says, you'll have to use
`kill-emacs-hook' or `kill-emacs-query-functions' and add a function
to ask the user and save if appropriate.


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