How to disable warnings/questions when using desktop-save-mode?

Marius Hofert

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May 23, 2012, 6:21:00 AM5/23/12

to Emacs help

Hi,

1) I have enabled desktop-save mode (with (desktop-save-mode 1)) since I find this
quite useful. I recently started to use different instances of Emacs (Emacs 24
GTK Snapshot version on Xubuntu 12.04). Every time I open another instance of
Emacs, I receive "...Warning: desktop file appears to be in
use by PID ... Use it anyway? (y or n)". How can I tell Emacs to not ask me but
always choose y (= yes) here automatically? [I tried (setq desktop-save t) but
I still obtained the warning.]

2) A similar problem appears when a new instance is closed and thus writes to the
desktop file. When closing an older instance afterwards one then obtains
"... Desktop file is more recent than the one loaded. Save anyway?". How can I
tell Emacs to not ask me but choose y (= yes) automatically?

Maybe 2) is solved by choosing "no" in 1) [which I guess is also fine in most cases].

Cheers,

Marius

Xah Lee

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May 23, 2012, 8:31:38 PM5/23/12

to

see the desktop section at

http://code.google.com/p/ergoemacs/source/browse/trunk/ergoemacs/init_settings.el

Xat

Marius Hofert

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May 24, 2012, 4:05:43 AM5/24/12

to Xah Lee, help-gn...@gnu.org

Precisely what I was looking for, many thanks, Xah.

Kevin Rodgers

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May 25, 2012, 12:20:09 AM5/25/12

to help-gn...@gnu.org

On 5/23/12 4:21 AM, Marius Hofert wrote:
> 1) I have enabled desktop-save mode (with (desktop-save-mode 1)) since I find this
> quite useful. I recently started to use different instances of Emacs (Emacs 24
> GTK Snapshot version on Xubuntu 12.04). Every time I open another instance of
> Emacs, I receive "...Warning: desktop file appears to be in
> use by PID ... Use it anyway? (y or n)". How can I tell Emacs to not ask me but
> always choose y (= yes) here automatically? [I tried (setq desktop-save t) but
> I still obtained the warning.]

(setq desktop-load-locked-desktop t)

> 2) A similar problem appears when a new instance is closed and thus writes to the
> desktop file. When closing an older instance afterwards one then obtains
> "... Desktop file is more recent than the one loaded. Save anyway?". How can I
> tell Emacs to not ask me but choose y (= yes) automatically?
>
> Maybe 2) is solved by choosing "no" in 1) [which I guess is also fine in most cases].

I think you need to make sure each instance has its own value of desktop
base-file-name and/or desktop-base-lock-name, effectively defeating the
locking mechanism altogether. You could do that by appending the PID
returned by (emacs-pid) to those variables in your ~/.emacs:

(setq desktop-base-lock-name
(convert-standard-filename (format ".emacs.desktop.lock-%d" (emacs-pid))))

or:

(eval-after-load 'desktop
'(setq desktop-base-lock-name
(format "%s-%d" desktop-base-lock-name (emacs-pid))))

and probably the same for desktop-base-lock-name.

--
Kevin Rodgers
Denver, Colorado, USA

Marius Hofert

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May 27, 2012, 1:32:47 PM5/27/12

to Kevin Rodgers, help-gn...@gnu.org

Dear Kevin,

thanks for your solution. Since it is simpler than the one suggested
previously, I got interested in it.
My ~/.emacs contains:

(desktop-save-mode 1)
(setq desktop-save t)
(setq desktop-load-locked-desktop t)

(setq desktop-base-lock-name
(convert-standard-filename (format ".emacs.desktop.lock-%d"
(emacs-pid))))

(setq desktop-dirname user-emacs-directory)

Still, I obtain "Desktop file is more recent than the one loaded. Save
anyway?" [Yes/No]. How can I avoid this question being raised?

Cheers,

Marius