#!/bin/sh

set -e

[ "$IFACE" != "lo" ] || exit 0
[ "$IFACE" != "--all" ] || exit 0

if [ -z "$IFACE" ]; then
	echo "no interface specified" >&2
	exit 1
fi

if [ ! -d /proc/sys/net/ipv6/conf/$IFACE ]; then
	echo "specified interface does not exist in /proc/sys/net/ipv6/conf/" >&2
	exit 1
fi

echo 0 > /procy/sys/net/ipv6/conf/$IFACE/accept_ra