#!/bin/sh

export LC_ALL=C

if [ "$2" = "up" ]; then
	/sbin/ip route list dev "$1" | grep -q '^default' &&
		/etc/init.d/chronyd online
fi

if [ "$2" = "down" ]; then
	/sbin/ip route list | grep -q '^default' ||
		/etc/init.d/chronyd offline
fi

exit 0