netmenu_off

#!/bin/bash

[ -z "$1" ] && echo "iface" && exit 0

echo ""
echo "$1: Disconnecting..."
echo ""
echo "" > /etc/resolve.conf

ip -4 addr flush dev $1

if [[ -z `cat /etc/network/interfaces | grep $1` ]]; then
    dhclient $1 -r
    ip route del default  dev $1 2>&1 1>/dev/null || true
    #dhclient -x -v
    ifconfig $1 down
    exit 0
else
    ifdown $1
fi
exit 0