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<H1>[Nel] Getting NeL up and running.</H1>
<B>Vincent Archer</B>
<A HREF="mailto:archer%40nevrax.com"
TITLE="[Nel] Getting NeL up and running.">archer@nevrax.com</A><BR>
<I>Tue, 27 Feb 2001 18:00:05 +0100</I>
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<PRE>According to Leighton Haynes:
><i> Most of my 'fixes' aren't really, they address the symptoms rather
</I>><i> than the cause, though I don't think I've broken anything major
</I>><i> with them ;) If anyone wants to give me some hints on what could
</I>><i> be causing them, please do.
</I>
Well, we don't have hints, because, as you may surmise, these do not
occur here.
><i> I gather the point of the Callback function is so that the
</I>><i> client which has loaded the Config file can become aware
</I>><i> of any changes to the parameters in the file, the time_service
</I>><i> doesn't appear to set any callbacks for this though. *shrug*
</I>
That's exactly what it's supposed to be, yes. So, either the callbacks
are set incorrectly, or they are called while they should not be.
><i> the client was exiting with a message in the logfile about
</I>><i> being unable to load file "data/". Managed to eventually track
</I>><i> it down to some of the texture loading code in
</I>><i> code/nel/src/3d/landscape.cpp. The loading of the diffuse
</I>><i> texturemap doesn't do a check for textName == "" though
</I>><i> the loading of the alpha texture map does. Haven't worked
</I>><i> out yet why it's decided that the textName is "" (it's too
</I>><i> late ;)). I modified the code to do a test for textName == ""
</I>><i> and made it default to loading the CTextureCross texture.
</I>
That's the strange part. It should not be loading an empty file name
at all. I suppose the check doesn't hurt either, so we'll look at
integrating it in future commits.
><i> As some other comments - processes are defaulting under linux to
</I>><i> some (IMHO) really ugly behaviour of 'fork'ing another process,
</I>><i> the sole purpose of this appears to be to let them run in the
</I>><i> background. I don't see any really good reason for doing this,
</I>
Well, there is one. Basically, if you look at these processes, you'll
see they first do a set of initialisations, then fork. The whole
fork-and-exit sequence is used to guarantee that service N+1 isn't
started before service N has at least performed the minimum required
initialisations.
><i> since it can be quite easily achieved by 'nohup'ing it and
</I>><i> shoving an '&' on the end of the line. Am I missing something?
</I>
You could too, but you'd have to slide in a "reasonable" sleep N in
the shell startup script. With reasonable varying a lot.
><i> (It makes it a bugger to debug, I can't run 'strace' on them effectively
</I>><i> etc etc. Obviously, i just commented the code out of my version ;)
</I>><i> Perhaps a commandline switch would be more appropriate?)
</I>
That'll be added, yes.
--
Vincent Archer Email: <A HREF="mailto:archer@nevrax.com">archer@nevrax.com</A>
Nevrax France. Off on the yellow brick road we go!
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