#!/bin/sh
# vim: set noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 :

name=$0
basename="$(basename $0)"

log() {
	logger -p daemon.info -t "${basename}" "$@"
}

timeout=${OMR_TRACKER_TIMEOUT:-1}
interval=${OMR_TRACKER_INTERVAL:-10}
retry=${OMR_TRACKER_TRIES:-2}
proxy=${OMR_TRACKER_PROXY:-127.0.0.1:1111}
hosts=${OMR_TRACKER_HOSTS:-google.com bing.com}

last=0

while true; do
	host=${hosts%% *}
	if curl -s --socks5 "${proxy}" --max-time "${timeout}" --retry "${retry}" "$host" &>/dev/null ; then
		[ ${last} = 0 ] && log "Shadowsocks is up"
		/etc/init.d/shadowsocks-libev rules_up 2> /dev/null
		last=1
	else
		[ ${last} = 1 ] && log "Shadowsocks is down"
		/etc/init.d/shadowsocks-libev rules_down 2> /dev/null
		last=0
	fi

	sleep "${interval}"
done