Re: disable messaging in echo area

[Eli Zaretskii <eliz@gnu.org>]

> Date: Wed, 08 Dec 2010 15:35:43 +0000
> From: Daniel Carvalho <idnael@gmail.com>
> 
> I have a function that runs in background every 10 seconds (with
> run-at-time). That function saves a file, and this causes a message to
> be displayed in the echo-area. I want to disable this message...

What does the message say?  If it says "Wrote /foo/bar", then you
cannot disable it from Lisp, currently: this message comes from the
write-region primitive on the C level, not from a call to Lisp-level
function `message'.  The message which precedes that, the one which
says "Saving file /foo/bar...", should be disabled by flet-binding
`message' to nil, I think.

> there was already a thread about that :
> http://lists.gnu.org/archive/html/help-gnu-emacs/2009-08/msg00374.html
> 
> 
> But the pointed solutions don't work
> 
> (flet ((message (&rest args) nil))
>    (message "test")
>    (write-file file)
>    )
> - the "test" message is not displayed, but the "write file" is still
> displayed!
> 
> 
> (let (message-log-max)
>   (write-file file)
>   )
> - no effect!

No amount of fiddling with Lisp-level `message' facilities will be
ever able to do what you want.  I suggest to file a feature request
(with "M-x report-emacs-bug RET") asking for a variable that could be
bound to disable all messages, even those coming from the C level.