#!/bin/sh
if [ ! -n "$1" ]
then
	echo "Usage: get_essid.sh [interface name]"
	echo "where [interface name] is eth0, wlan1, etc"
	exit -1
fi 
/sbin/iwconfig $1 | grep ESSID | sed -e "s/$1.*ESSID:[\" o]//" | sed -e "s/[\"\/].*//" | sed -e "s/\"//g" | sed -e "s/^ff$/off/"