#!/bin/bash
#
while getopts ":Dd:p:" optname
do
    case "$optname" in

        "p")
            # echo "Devices in the array"
            MD_dev=$(echo "${OPTARG}"| sed 's/\/dev\///')



            dev_count=$(cat /sys/block/$MD_dev/md/raid_disks)
                  echo -e "{\n\t\"data\":["
            for (( count=0; count<dev_count; count++ ))
                do
                device_name=$(ls -la /sys/block/$MD_dev/md/rd$count/ | grep "block " | sed 's|.*block/||' | cut -d/ -f1)
                if ((count<dev_count-1));
                then echo -e "\t{ \"{#MDDEV_NAME}\":\t\"${device_name}\" },"
                else echo -e "\t{ \"{#MDDEV_NAME}\":\t\"${device_name}\" }"
                fi
                done
                echo -e "\t]\n}"




            ;;

        "d")
            # echo "Devices in the array"
            MD_dev=$(echo "${OPTARG}"| sed 's/\/dev\///')
            dev_count=$(cat /sys/block/$MD_dev/md/raid_disks)
                  echo -e "{\n\t\"data\":["
            for (( count=0; count<dev_count; count++ ))
                do
                device_name=$(ls -la /sys/block/$MD_dev/md/rd$count/ | grep "block " | sed 's|.*block/||' | sed -r 's/\/.+//')
                if ((count<dev_count-1));
                then echo -e "\t{ \"{#BLK_NAME}\":\t\"${device_name}\" },"
                else echo -e "\t{ \"{#BLK_NAME}\":\t\"${device_name}\" }"
                fi
                done
                echo -e "\t]\n}"




            ;;
        "D")
            # echo "Discovery"
                  echo -e "{\n\t\"data\":["
            typeset -i nbLines
            typeset -i cntLines=0
            nbLines=`cat /proc/mdstat | grep ^md | wc -l`
            cat /proc/mdstat | grep ^md | while read line
            do
                cntLines=${cntLines}+1
                MDdev=`echo $line | awk '{print $1}'`
                if [ ${cntLines} -eq ${nbLines} ]; then
                        echo -e "\t{ \"{#MD_DEVICE}\":\t\"${MDdev}\" }"
                else
                        echo -e "\t{ \"{#MD_DEVICE}\":\t\"${MDdev}\" },"
                fi
            done
            echo -e "\t]\n}"

            ;;
        "?")
            echo "Unknown option $OPTARG"
            ;;
        *)
            echo "Unknown error while processing options"
            ;;
    esac
done