[JDEV] Server feature request

[temas]

SIGUSR2 is used by mio as a mechanism to break the loop so new sockets
can be added and stuff like that.

--temas

On 10 May 2001 18:18:23 -0600, David Waite wrote:
> kadokev at msg.net wrote:
> 
> > > Those are the definitions of those signals in BIND though. They have
> > > different (already used) meaning within Jabber - they are used by pth
> > > (and I believe MIO). They are simply user-defined signals.
> >
> > Right, exactly.
> >
> > So we pick two new signals to serve this purpose in Jabber, the concept is
> > still the same. So we use SIGINFO to turn on debugging, and SIGWINCH to turn
> > it off, or any two other signals that are not already taken.
> >
> > It would also be useful to have the ability to turn debugging on and off by
> > sending an admin message, but the signal method is more important, as it would
> > be very useful to debugging cases where I cannot connect/login at all, and thuse
> > cannot send any messages...
> 
> I'd welcome "any two other signals which are not already taken." The system or parent
> process sends those signals. I do not believe SIGINFO is defined on i386, its also
> mapped to SIGPWR which is an exit on some other platforms, SIGWINCH is sent whenever
> the terminal size changes - it sure wouldn't help me debug if the program behavior
> changed when I resized the terminal I was getting output in :-).
> 
> If those signals weren't used internally, I agree it would be a really nice feature
> to add (you actually only need one signal as a toggle, really). What is SIGUSR2
> really used for?
> 
> > Kevin
> >
> > > -David Waite
> > > kadokev at msg.net wrote:
> > > >Server feature request, the ability to turn debugging on/off by sending a
> > > >Unix signal to the jabberd process, something like this:
> > > >
> > > >     SIGUSR1   Turns on debugging; each SIGUSR1 increments debug level.
> > > >               (SIGEMTon older systems without SIGUSR1.)
> > > >
> > > >     SIGUSR2   Turns off debugging completely.   (SIGFPEon older systems
> > > >               without SIGUSR2.)
> > > >
> > > >The astute observer will notice that the two paragraphs above are verbatim from
> > > >the documentation for BIND :-)
> > ...
> > > >>Yes!! It's been a long time I was thinking about it!
> > > >>In certain cases it is just necessary...
> > > >>
> > > >>/MAciek
> > > >>
> > > >>On Thu, 10 May 2001 11:45:35 -0600 Malone, Pat wrote:
> > > >>
> > > >>>In trying to work through a nasty client problem today, I had 'if only'
> > > >>>thought pass through my head.  So, here is a wish item for the jabberd
> > > >>>developer gods:
> > > >>>
> > > >>> Enable the ability to send a sig of some kind to jabberd to toggle
> > > >>>debugging on and off, a.k.a. the way debug can be toggled with named.
> > > >>>
> > > >>>It sure would be nice to toggle debug on when a problem shows up without
> > > >>>having to kill the server.
> > _______________________________________________
> > jdev mailing list
> > jdev at jabber.org
> > http://mailman.jabber.org/listinfo/jdev
> 
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