#!/bin/sh
# Script by Ypnose - http://ywstd.fr
set -ex

if [ "$#" -lt 2 ] || [ "$1" = "-h" ]; then
	printf "usage: %s [INTERFACE] [-d] [IP] [ROUTE]\n" "${0##*/}"
	exit
fi

if [ "$2" = "-d" ]; then
	ip link set dev "$1" down
	ip addr flush dev "$1"
	exit
fi

ip addr add "$2" dev "$1"
ip link set dev "$1" up
if [ -n "${3:+s}" ]; then
	ip route add default via "$3"
fi

exit