GNU bug report logs - #31859
26.1; Emacs has no way to determine if the current instance has a running server

Previous Next

Full log

View this message in rfc822 format

From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#31859: closed (26.1; Emacs has no way to determine if the
 current instance has a running server)
Date: Sat, 23 Jun 2018 07:53:01 +0000

[Message part 1 (text/plain, inline)]

Your message dated Sat, 23 Jun 2018 10:52:34 +0300
with message-id <83fu1euegt.fsf <at> gnu.org>
and subject line Re: bug#31859: 26.1; Emacs has no way to determine if the current instance has a running server
has caused the debbugs.gnu.org bug report #31859,
regarding 26.1; Emacs has no way to determine if the current instance has a running server
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


-- 
31859: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=31859
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Thibault <thibault <at> thb.lt>
To: bug-gnu-emacs <at> gnu.org
Subject: 26.1;
 Emacs has no way to determine if the current instance has a running
 server
Date: Sat, 16 Jun 2018 18:04:19 +0200

[Message part 3 (text/plain, inline)]

It's all in the subject line: Emacs has no way to determine if the
current instance has a running server.  There's the `server-mode'
variable along with the `daemonp' and `server-running-p' functions, but
none of them are actually usable for the most elementary use case of
determining whether *this* instance has a server started.

 - `server-mode' is nil if the server was started with `M-x server-start',
   and t only if was started with `server-mode'

 - `(daemonp)' returns non-nil if and only if emacs was started as a
   daemon.

That is, the following sexp:

(progn
    (require 'server)
    (server-start)
    (or server-mode (daemonp)))

will always evaluate to nil, except from emacsclient.

 - (server-running-p) tries to determine if /some/ server is running,
   somewhere, that is configured like the current server would be, but
   it doesn't guarantee that the server runs from the current instance.
   If you start two instances, `(server-running-p)' will eval to `t' *in
   both* after the server was started in any one of them.

Thanks,
Thibault

[signature.asc (application/pgp-signature, inline)]

[Message part 5 (message/rfc822, inline)]

From: Eli Zaretskii <eliz <at> gnu.org>
To: thibault <at> thb.lt
Cc: 31859-done <at> debbugs.gnu.org
Subject: Re: bug#31859: 26.1;
 Emacs has no way to determine if the current instance has a running
 server
Date: Sat, 23 Jun 2018 10:52:34 +0300

> Date: Sat, 16 Jun 2018 19:30:51 +0300
> From: Eli Zaretskii <eliz <at> gnu.org>
> Cc: 31859 <at> debbugs.gnu.org
> 
> > From: Thibault Polge <thibault <at> thb.lt>
> > Date: Sat, 16 Jun 2018 18:27:03 +0200
> > 
> > > Does it work to test whether server-process is bound and non-nil?
> > 
> > It works, indeed.  Would you accept a documentation PR on the variable
> > and the two functions, which are much more obvious candidates?
> > Something like:
> > 
> > For a general way of determining if the current instance has a server
> > running, check the value of `server-process`.
> > 
> > Or a PR adding a stupid helper function like:
> 
> I'd prefer a documentation change, but let's see if someone has other
> opinions.

No further comments, so I installed a documentation change, and I'm
marking this bug done.

Thanks.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.