#!/bin/sh

# start supervising existense of FON hotspot and starting/killing dnsmasq
echo "`uptime | awk -F" " '{print $1}'`: $0 tun0 dnsmasq supervisor: fork into background, checking hotspot status..." >>/tmp/.startup_log
while :; do
	ifconfig tun0 >/dev/null 2>/dev/null
	if [ "$?" = "0" ]; then
		[ -z `cat /var/run/dnsmasq_tun0.pid` ] && { # if it is not running already
			dnsmasq -i tun0 -z -I lo,ath1 --no-dhcp-interface=tun0 -x /var/run/dnsmasq_tun0.pid && \
			echo "`uptime | awk -F" " '{print $1}'`: tun0 dnsmasq supervisor: dnsmasq started" >>/tmp/.startup_log
		}
	else
		[ -n `cat /var/run/dnsmasq_tun0.pid` ] && { # if it is really running
			kill `cat /var/run/dnsmasq_tun0.pid` && \
			echo "`uptime | awk -F" " '{print $1}'`: tun0 dnsmasq supervisor: dnsmasq stopped" >>/tmp/.startup_log
		}
	fi
	sleep 5
done