#!/bin/sh
if [ "$1" = "--help" ] ; then
	echo Monitoring utility for the blackhole system.
	echo It is executed fron cron every 5 minutes, without arguments.
	echo See the man page.
	exit 1
fi
LOGDIR=/var/log/blackhole
mkdir -p $LOGDIR
check(){
	LOG=$LOGDIR/$1
	/usr/sbin/blackhole-control $1 >$LOG.tmp
	if [ -s $LOG.tmp ] ; then
		if cmp --quiet $LOG.tmp $LOG.sent 
		then
			true
			# Nothing to do
		else
			EMAILS=/etc/blackhole-monitor-emails.lst
			if [ -f $EMAILS ]; then
				cat $LOG.tmp | mail -s "blackhole $1" `cat $EMAILS`
			fi
			mv -f $LOG.tmp $LOG.sent
		fi
	else
		rm -f $LOG.sent
	fi
}
check rejects
check statuserr