diskutil_

#!/bin/bash
#%# family=auto
#%# capabilities=autoconf suggest

if [ "$1" = "autoconf" ]; then
        echo yes
        exit 0
fi

if [ "$1" = "suggest" ]; then
    while read -a line
    do
        if [[ "${line[2]}" =~ ^[hs]d[a-z][0-9]+|cciss/.*$ ]]
        then
            echo "${line[2]}"
        elif [[ "${line[2]}" =~ ^dm-[0-9]+$ ]]
        then
            echo -n "${line[2]} "
            index=${line[2]#dm-}
            ls -l /dev/mapper | grep "254,\s*${index} " | cut -c 47-1024
        fi
    done < /proc/diskstats
    exit 0
fi

device=$(basename $0)
device=${device#diskutil_}

devname="dev_${device}"
tmpdevice=${!devname}
if [ $tmpdevice ]; then
    realdevice=${!devname}
else
    realdevice=$device
fi

if [ "$1" = "config" ]; then
    echo 'graph_category disk'
    echo "graph_title Disk utilization for ${device} (/dev/${realdevice})"
    echo 'graph_args -l 0 -u 100'
    echo 'graph_vlabel %'
    echo 'util.label utilization'
    echo 'util.info utilization %'
    echo 'util.type GAUGE'
    echo 'util.draw AREA'
    exit 0
fi

statefiledir=/var/lib/munin/plugin-state/
statefile="${statefiledir}diskutil-${device}.state"

newtime=$(date -u +%s)

ncpu=0
while read -a line
do
    case "${line[0]}" in
        cpu)
            newticks=$(( line[1] + line[2] + line[3] + line[4] + line[5] + line[6] + line[7] + line[8] + line[9] ))
            ;;
        cpu*)
            ncpu=$(( ncpu + 1 ))
            ;;
        *)
            break 2
            ;;
    esac
done < /proc/stat

while read -a line
do
    if [[ "${line[2]}" = "${realdevice}" ]] ; then
        newioticks=${line[12]}
    fi
done < /proc/diskstats

if [ -s $statefile ] ; then
        read oldtime oldticks oldioticks < $statefile
else
        oldtime=$newtime
        oldticks=$newticks
        oldioticks=$newioticks
fi
echo "${newtime} ${newticks} ${newioticks}" > $statefile
deltatime=$(( $newtime - $oldtime ))
deltaticks=$(( $newticks - $oldticks ))
deltaioticks=$(( $newioticks - $oldioticks ))

#printf "%d, %d, %d\n" $deltatime $deltaticks $deltaioticks
#printf "util.value %d.%d\n" $(( $deltaioticks * $ncpu * 10 / $deltaticks )) $(( $deltaioticks * $ncpu * 10 * 10000 / $deltaticks - $deltaioticks * $ncpu * 10 / $deltaticks * 10000 ))
printf "util.value %d.%d\n" $(( $deltaioticks / $deltatime / 10 )) $(( $deltaioticks * 1000000000 / $deltatime / 10 - $deltaioticks / $deltatime / 10 * 1000000000 ))