Re: strange pppd question
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On Tue, 17 Aug 1999, Nathan E Norman wrote:
> I'm trying to write a daemon (in perl)
Isn't Perl wonderful? At the moment, i'm working on a CD ripper using
cd-diskid, perl-tk, cdparanoia, id3, and bladeenc and CDDB.pm. It actually
works pretty well!
> that monitors the "health" of the next hop on an ethernet port (think
> DSL or cable connection), and dials a provider when the connection
> goes down. To do this, I need to invoke pppd from my prgram ... pppd
> forks and disconnects to do this, so I have no easy way to determine
> WHEN the link is up (I delete the eth default route and add a ppp0
> default route only once the dial-link is up, or that's the plan).
> Right now I have to use sleep and that's plain ugly (and doesn't
> always work when the dial server is cranky).
You're invoking pppd directly? Why not use pon or wvdial? (just curious)
Are you going to continue monitoring the health, and undial/restore eth0
when it heals?
> So, how to discover that pppd is up and running on a link? Perhaps I'm
> being incredibly dense here (I'm sure I am) but I don't see how to do it
Put a script in /etc/ppp/ip-up.d to send SIGUSR1 to your program (create a
pid file in /var/run so the script can find you). This way, your program
just waits til it gets SIGUSR1 before tearing down the eth0 route.
- --
finger for PGP public key.
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