mount_image.sh

#!/bin/bash

[ "$UID" -eq 0 ] || exec sudo "$0" "$@"

imagefile=$1
mountpoint=$2

if [ -z "$1" ] || [ -z "$2" ]; then
  echo "Usage: "
  echo "mount_image IMAGE_FILE_PATH MOUNT_POINT"
  exit 0
fi

sector_size=$(fdisk -l $imagefile | grep Units: | sed 's/.*= //' | sed 's/ [a-zA-Z]*//')

echo ""
echo "Select what image you what to mount"
echo ""

i=0
echo "0) All at once"
fdisk -l $imagefile | grep "$imagefile[0-9]" | while read line 
do
  i=$((i + 1))
  echo "$i) $line"
done

echo ""
read -p "Enter the number option to mount: " input
echo ""

if [[ ! "$input" == ?(-)+([0-9]) ]]; then
  echo "Your selection is not a number"
  exit 0
fi

if [ "$input" -lt 1 ] || [ "$input" -gt "$i" ]; then
  echo "Your selection is invalid, maximun selection is: $i"
  exit 0
fi

if [ "$input" -gt 0 ]; then
  startat=$(fdisk -l $imagefile | grep "$imagefile[0-9]" | sed "${input}q;d" | awk '{print $2}')
  if ! [ -d "$mountpoint" ]; then
    mkdir -p $mountpoint
  fi
  offset=$((startat * $sector_size))
  mount -o loop,rw,sync,offset=$offset $imagefile $mountpoint
fi