#!/bin/sh

export LC_ALL=C

if [ "$2" = "down" ]; then
  /sbin/ip route ls | grep -q '^default' || {
    [ -f /var/run/ddclient/ddclient.pid ] && /usr/bin/systemctl stop ddclient.service || :
  } && { :; }
fi

if [ "$2" = "up" ]; then
  /sbin/ip -o route show dev "$1" | grep -q '^default' && {
    /usr/bin/systemctl is-enabled ddclient >/dev/null && /usr/bin/systemctl start ddclient.service || :
  } || { :; }
fi