#!/bin/sh

set -e

determine_implementation() {
	[ -x /sbin/udhcpc ] && echo "udhcpc" && return
	echo "???"
}

start() {
	case "$1" in
	udhcpc)
		/sbin/udhcpc -b -R -p /var/run/udhcpc.$IFACE.pid -i $IFACE
		;;
	*)
		echo "implementation $1 not supported"
		exit 1
	esac
}

stop() {
	case "$1" in
	udhcpc)
		kill $(cat /var/lib/udhcpc.$IFACE.pid)
		;;
	*)
		echo "implementation $1 not supported"
		exit 1
	esac
}

impl=$(determine_implementation)

[ -z "$VERBOSE" ] || set -x

case "$MODE" in
start) start $impl ;;
stop) stop $impl ;;
*) echo "unknown mode $MODE" ;;
esac