A hacky little script to get the name of the the proper 'internet'

interface  on a node in an Emulab experiment. Assumes the name of
the 'Internet' LAN is 'planetc'.

pelab/stub/which-iface.sh

+#!/usr/bin/sh
+
+LINKNAME=planetc
+HOSTNAME=`cat /var/emulab/boot/nickname | sed 's/\..*//'`
+LINK="$HOSTNAME-$LINKNAME"
+LINKIP=`grep "$LINK" /etc/hosts | cut -f1`
+IFACENAME=`ifconfig -a | perl -e 'while(<>) { if (/^(eth\d+)/) { $if = $1; } if (/10.1/) { print "$if\n"; exit 0; }} exit 1;'`
+
+echo $IFACENAME