#!/bin/bash

typeset JSONFILE="/tmp/zabbix_mdraid_discovery.json"

#echo "OPTIND is now $OPTIND"
while getopts ":Dm:e:s:d:" optname
do
    case "$optname" in
	"e")
	    # Extract string values
	    /sbin/mdadm --detail ${MD_dev} | grep "${OPTARG}" | awk -F":" '{print $2}' | tr -d [[:space:]]
            ;;
	"s")
            # echo "Size of the array"
	    /sbin/mdadm --detail ${MD_dev} | grep "${OPTARG}" | awk -F":" '{print $2}' | sed -e "s/(.*//" | tr -d [[:space:]]
            ;;
	"d")
            # echo "Devices in the array"
	    /sbin/mdadm --detail ${MD_dev} | tail -n+2 | grep "/dev/" | awk -v x=${OPTARG} '$4 == x {print $5,$6,$7}'
            ;;
	"m")
            # echo "Setting MD RAID"
	    MD_dev="${OPTARG}"
	    ;;
	"D")
           # echo "Discovery"
            echo -en "{\n \"data\":[" > ${JSONFILE}
            cat /proc/mdstat | grep ^md | while read line
            do
                MDdev=`echo $line | awk '{print $1}'`
                echo -en "\n { \"{#MD_DEVICE}\":\"/dev/${MDdev}\" }," >> ${JSONFILE}
            done
            echo -e " ]\n}" >> ${JSONFILE}
	    # this awkward way to handle removal of coma from the last line"  	    
	    cat ${JSONFILE} | sed -e 's/}, ]/}\n ]/'
            ;;
	"?")
            echo "Unknown option $OPTARG"
            ;;
	":")
            echo "No argument value for option $OPTARG"
            ;;
	*)
           # Should not occur
            echo "Unknown error while processing options"
            ;;
    esac
    #    echo "OPTIND is now $OPTIND"
done