#!/bin/sh
# Check if zmailer is working properly
# Limitations are to be configured in /etc/zmailer/zmailer.conf

set -e

. /etc/zmailer/zmailer.conf

status()
{
    LOAD=`awk '{print $2*100}' /proc/loadavg`
    if [ $LOAD -gt $MAX_LOAD ]; then
		REASON="System Load"
    fi
    for i in router scheduler; do
	if [ ! -f $POSTOFFICE/.pid.$i ]; then
		REASON="$i dead. Pidfile $POSTOFFICE/.pid.$i missing"
	else
		X=`cat $POSTOFFICE/.pid.$i`
		if [ ! -d /proc/$X ]; then
			REASON="$i dead. Process $X not running"
		fi
	fi
    done
    ps ax >/tmp/$$
    if ! grep -q smtpserver /tmp/$$; then
		REASON="No smtpserver running"
    fi
    mailq -ss >/tmp/$$ 2>&1
    if grep -q "Connection refused" /tmp/$$; then
		REASON="Zmailer not responding to mail queue status request"
		return
    fi
    if ! grep -q "router queue" /tmp/$$; then
		REASON="Zmailer queue status request failed"
		return
    fi
    NR=`awk '/in router/ {print $1}' /tmp/$$`
    NT=`awk '/in transport/ {print $1}' /tmp/$$`
    if [ $NR -gt $MAX_NR ]; then
		REASON="Router Queue too high"
    fi
    if [ $NT -gt $MAX_NT ]; then
		REASON="Transport Queue too high"
    fi
}

report()
{
	echo -e "\nUnix Operational Status:"
	echo "------------------------"
	w
	ps ax
	echo -e "\nCurrent Zmailer Status:"
	echo "------------------------"
	mailq -sQ
}

status

if [ "$REASON" ]; then
	report 2>&1| mail postmaster -s"Zmailer Alert:$REASON"
fi

rm /tmp/$$

exit 0