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From: "Ido Admon" <rhingael@mscc.huji.ac.il>
To: freebsd-questions@freebsd.org
Date: Tue, 17 Apr 2007 18:02:25 +0300
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Subject: Execute command upon interface initialization?
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Hello list,
I couldn't find any way to execute an arbitrary command upon network
interface initialization. My situations is that I have and ethernet card
that takes DHCP from a cables provider (not a fixed IP address) and I
need to update a DynDNS hostname everytime it does (everytime the IP
changes).
I couldn't find a way to execute shell commands using the rc system or
dhclient, what did I miss?
Sure I could just use cron but that's not very elegant.

Thanks and please cc me as I'm not on the list,
Ido Admon