[ale] Three d[a]emonic questions

[Jerald Sheets]

Perchance, are you running a game server?  If so, I may have the solution
for you.

Jerald M. Sheets jr.
Sr. UNIX Systems Administrator
Datatrac, Inc
770.552.3866 x2494 
*****************
> su -
Password:
# cat /dev/flood > /dev/earth
# rdev noah+beasts
# dd if=noah+beasts of=/dev/earth

 

> -----Original Message-----
> From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On 
> Behalf Of Michael D. Hirsch
> Sent: Wednesday, November 17, 2004 9:07 AM
> To: John Mills; Atlanta Linux Enthusiasts
> Subject: Re: [ale] Three d[a]emonic questions
> 
> On Tuesday 16 November 2004 10:51 pm, John Mills wrote:
> > ALErs -
> >
> > I'm doing preliminary debug on a simple server I've written.
> >
> > 1) A few months ago (<=12), someone asked how to set things 
> up so one
> > instance of a service could be kept going, and promptly be 
> restarted when
> > it died or was killed. There were a couple of replies, but 
> I can't refind
> > the thread. Could anyone please remind me where to find this?
> 
> I can't recall exactly, but searching for inittab would be a 
> good start.
> 
> > 2) If I use xinetd to start my server, I need to ensure 
> that, if a running
> > instance of the server exist, that is the one used. If not, 
> a new one
> > should be started. 'man xinetd' suggests this is a 'single_threaded'
> > service. How do I designate a service to be this type?
> 
> I was doing this just last week.  Look at the wait attribute 
> in the man page 
> for xinetd.conf.  This does exactly what you want.
> 
> > 3) My server needs to listen on two ports. I want a 
> connection on either
> > port to use the same, single, running server, or start one 
> if none is
> > running at the moment. Can I achieve this with duplicate entries in
> > /etc/services against the two port numbers? If not, how?
> 
> This I don't know about.  It's easy enough for one server to 
> listen on two 
> ports, but if you are also using xinetd it gets much 
> trickier.  Xinetd would 
> need to know that the two ports are associated, too, and I 
> don't know how to 
> do that.  I can't swear that it isn't possible, however.
> 
> Michael
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