Mac Address Spoofing Script

mac

#!/usr/bin/env sh
SCRIPT=`basename $0`
BACKUP=$HOME/.mac.orig
case "$1" in
	current)
		ifconfig en0 | ack ether | cut -d\  -f 2 
		;;
	new)
		openssl rand -hex 6 | sed 's/\(..\)/\1:/g; s/.$//'
		;;
	set)
		ifconfig en0 ether $2
		;;
	spoof)
		if [ ! -f $BACKUP ] 
		then
			CURR=`$0 current`
			echo $CURR > ~/.mac.orig
			echo Backed up original address: $CURR
		fi
		NEW=`$0 new`
		echo Setting to $NEW
		`$0 set $NEW` && echo Set.
		;;
	unspoof)
		if [ -f $BACKUP ]
		then
			OLD=`cat ~/.mac.orig`
			echo Restoring to $OLD
			`$0 set $OLD` && echo Restored.
		else
			echo File $BACKUP does not exist; cannot restore!
			exit 1
		fi
		;;
	*)
		echo "Usage: $SCRIPT { current | new | set [ADDRESS] | spoof | unspoof }"
		echo "Current is $($0 current)"
		exit 1
		;;
esac