browse linux drive image files

#!/bin/bash

if [ "$(id -u)" != "0" ]; then
  exec sudo "$0" "$@"
fi

imgfile="$1"
if [ ! -e $2 ]; then whereToMount="$2"; else whereToMount="mountPoint"; fi
partition=`parted -s "$imgfile" unit B print | awk '{print $2}' | sed -n '/Start/,$p' | sed '1d' | sed '/^$/d' | sed 's/B//'`
offset=($partition)
numPartitions=${#offset[@]}

echo -e "\n$imgfile contains $numPartitions partitions\n"

for partNum in 0 $(($numPartitions-1)); do
    offset="${offset[$partNum]}"
    nextoffset="${offset[$partNum+1]}"
    if [ ! -z $nextoffset ]; then
        sizelimit=$(($nextoffset-$offset))
    else
        sizelimit=""
    fi

    mkdir -p "$whereToMount/part$partNum"
    mount -o loop,offset=$offset,sizelimit=$sizelimit $imgfile $whereToMount/part$partNum
done

xdg-open $whereToMount 2>/dev/null 1>/dev/null

echo "Image should now be mounted and browsable"
echo "Leave this terminal open while you browse the image"
echo 'then come back and dismount the image by entering "Y"'
    while [ "$response" != "y" ]; do
        read -p "Dismount the image now? [Y/n]: " response
        response=${response:-Y}
        response="${response:0:1}"
        response="${response,,}"
    done
umount $whereToMount/*
rmdir $whereToMount/*
rmdir $whereToMount

exit