View Full Version : [all variants] Bash script to find network device connected?

January 18th, 2011, 12:03 AM
Hello everyone!

I need a bash script to run ARPON for the connected network device, eth1 or eth2. (ethernet or wireless)

Arpon has an option (-o) to select the network automatically, but it only works for ethernet, hence i need this script. I've also tried running arpon for ethernet and wireless at the same time, but the arpon process running the inactive device will consume all of my CPU.

So, basically i need a script to find which device is connected, eth1 or eth2 and then to run arpon -d -i <device connected> (or something like that).

Is there an easy way to do this?

Something like this in Bash:

IF eth1=connected
THEN arpon -d -i eth1

IF eth2=connected
THEN arpon -d -i eth2
ENDIF(please don't make fun of this...) :D

I've searched everywhere how to find the connected device via bash, but i couldn't find anyhting...

Help please!? I need to protect my arp cache.

January 18th, 2011, 02:34 AM
Found the solution HERE (http://forums.debian.net/viewtopic.php?f=5&t=59312&p=344193#p344193)