Munin contributed plugins

#!/bin/bash

case $1 in

    config)

        cat <<EOF

graph_title TCP retransmissions

graph_vlabel Rate, retrs/sockets

graph_category network

graph_info dynamic TCP socket retransmission counters

rate.label Retransmission rate

rate.draw LINE2

EOF

	exit 0

        ;;

    autoconf)

        if [ -f /proc/net/tcp -o -f /proc/net/tcp6 ]

        then

            echo yes

            exit 0

        else

            echo no

            exit 1

        fi

esac

cat /proc/net/tcp* | awk '

{

	TOTAL += $7;

	COUNT++;

}

END {

	printf "rate.value %.3f\n", TOTAL/COUNT

}

'