# When the pings fail, power off the computer

REMOTE_IP='192.168.1.2'

if [ "$1" == '--help' ] || [ "$1" == '-h' ]
then
	echo ''
	echo 'This script checks if the pings to $REMOTE_IP work.'
	echo 'If they do not, it powers off this computer.'
	echo ''
	echo 'To avoid this, create a file called /usr/local/etc/cron_poweroff.lock'
	echo '(You can do this by typing "sudo touch /usr/local/etc/cron_poweroff.lock".)'
	echo ''
	echo 'It should be run every night (if the PC is on) as root, by a cronjob.'
	echo '(You can configure this in /etc/crontab.)'
	echo ''
	exit 0
fi

if [ -e /usr/local/etc/cron_poweroff.lock ]
then
	exit 1
fi

while fping -q $REMOTE_IP
do
	sleep 7m

	if [ -e /usr/local/etc/cron_poweroff.lock ]
	then
		exit 1
	fi
done

poweroff