#!/bin/sh
#
# Plugin to graph number of courier login/logouts
# Requires: logtail
#
# This plugin should be symlinked to have the service name that you
# want to track. If you want to watch imaplogin entries you would do: 
# ln -s /usr/share/munin/plugins/courier_ /etc/munin/plugins/courier_imaplogin
# if you wanted to track courierpop3login entries, then you would do:
# ln -s /usr/share/munin/plugins/courier_ /etc/munin/plugins/courier_courierpop3login
#
# Coypright Micah Anderson <micah@riseup.net>
# Jan 22, 2005
#
#
#%# family=contrib
#%# capabilities=autoconf

# The different log lines we are interested in:
#
# imaplogin:
# Jan 22 10:53:35 raven imaplogin: Connection, ip=[::ffff:192.168.0.1]
# Jan 22 06:28:19 raven imaplogin: DISCONNECTED, user=someuser, ip=[::ffff:192.168.0.1], headers=0, body=0, time=22
# Jan 22 10:53:35 raven imaplogin: LOGIN, user=someuser, ip=[::ffff:192.168.0.1], protocol=IMAP
# Jan 22 06:28:16 raven imaplogin: LOGOUT, user=someuser, ip=[::ffff:192.168.0.1], headers=0, body=2811, time=0
#
# courierpop3login:
# Jan 22 06:28:24 raven courierpop3login: Connection, ip=[::ffff:192.168.0.1]
# Jan 22 06:48:22 raven courierpop3login: DISCONNECTED, user=someuser, ip=[::ffff:192.168.0.1], top=0, retr=0, time=21
# Jan 22 06:28:24 raven courierpop3login: LOGIN, user=someuser, ip=[::ffff:192.168.0.1]
# Jan 22 06:28:25 raven courierpop3login: LOGOUT, user=someuser, ip=[::ffff:192.168.0.1], top=0, retr=0, time=0


# Set the location of the courier logs
COURIER_LOG=${logfile:-/var/log/mail.log}
SERVICE=${service:-`basename $0 | sed 's/^courier_//g'`}
OFFSET_FILE=/var/lib/munin/plugin-state/courier_${SERVICE}.offset
LOGTAIL=${logtail:-/usr/sbin/logtail}

case $1 in
    autoconf|detect)
    if [ -f ${COURIER_LOG} -a -x ${LOGTAIL} ] 
    then
	# Makes no sense for wildcard plugin to autoconf to yes
	# unless you can provide suggestions.
	echo no
	exit 0
    else
	echo "no (either $COURIER_LOG was not found, or logtail was not in your path)"
	exit 1
    fi
    ;;
    config)
    cat <<EOF
graph_title Courier $SERVICE Connections
graph_vlabel Number of Connections
graph_total Total
graph_category Mail
connection.label connections
disconnected.label disconnections
login.label logins
logout.label logouts
EOF
    exit 0
    ;;
esac

ARGS=0
`$LOGTAIL /etc/hosts 2>/dev/null >/dev/null`
if [ $? = 66 ]; then
    if [ ! -n "$logtail" ]; then
        ARGS=1
    fi
fi

TEMP_FILE=`mktemp -t munin-courier.XXXXXX`

if [ -z "$TEMP_FILE" -o ! -f "$TEMP_FILE" ]; then
    exit 3
fi

if [ $ARGS != 0 ]; then
    ${LOGTAIL} -f ${COURIER_LOG} -o ${OFFSET_FILE} | grep "$SERVICE" > ${TEMP_FILE}
else
    ${LOGTAIL} ${COURIER_LOG} ${OFFSET_FILE} | grep "$SERVICE" > ${TEMP_FILE}
fi
connection=`grep Connection ${TEMP_FILE} | wc -l`
disconnected=`grep DISCONNECTED ${TEMP_FILE} | wc -l`
login=`grep LOGIN ${TEMP_FILE} | wc -l`
logout=`grep LOGOUT ${TEMP_FILE} | wc -l`

rm ${TEMP_FILE}

echo "connection.value ${connection}"
echo "disconnected.value ${disconnected}"
echo "login.value ${login}"
echo "logout.value ${logout}"