Call Script When Network Interface Changes State

[trmg]

Hey All,

I'm having trouble with time synchronization issues with some of my dual-boot Macs. It's not the normal UTC/Localtime issue that affects booting between Windows and OS X. It seems that the time often drifts just enough to break network logins (Active Directory).

So, what I want to do is write a script that runs under OS X and simply runs the commands:

systemsetup -setusingnetworktime off
systemsetup -setusingnetworktime on

when any network interface (wireless or wired) changes state to up.

We're running Leopard. What's the best way to approach this?

 

[trmg]

Oops...I should clarify:

"when any network interface (wireless or wired) changes state to up **and has obtained an IP address**."

Thanks!

 

[fisheromacse]

i beleive this can be done via Automator/Applescript.

here is a link to Apple's Automator forums:

http://discussions.apple.com/forum.jspa?forumID=1261&start=0

and a couple more to similar but not the same questions:

http://discussions.apple.com/thread.jspa?messageID=8051083&#8051083

http://discussions.apple.com/thread.jspa?messageID=9033611&#9033611

 

[JimHilton]

Hi, how much drift we talking about? You could just write a cron job that will do the 2 commands you want to do every 5 mins or so.