[Since EBCDIC]

I have things in my .tcshrc that are run depending upon location context. At home I have some resources, at work I have others. I was using `hostname | cut -f 2- -d.` (because Darwin's domainname gives me a blank string) but recently I'm getting "mickey.local" whether I'm using my home or office networks (via DHCP).

A friend suggests I work through ifconfig, maybe pulling its inet or broadcast values, but that seems ugly.

What's the correct way to update network status when I switch Networks in the pref pane?

Conversely, is there a way to detect an Ethernet cable being inserted and cause Networks to switch automagically?

[Since EBCDIC]

Update: /etc/resolve.conf seems to be updated with a proper value...

For others searching, my .tcshrc (or .cshrc, if you're a csh user), now says:

case "Darwin":
set myHost = `hostname | cut -f1 -d.`
set myDomain = `cat /etc/resolv.conf | grep domain | cut -f2 -d' '`
breaksw

If this *isn't* the proper way to detect the current network state, or if there's some way to trigger a shell script to go when a network is changed, please share! Thanks.