Mount image under /tmp

automount.sh

#!/bin/bash
set -e

[[ -z $1 ]] && echo "$(basename $0) <image>" && exit 1

image=$1

[[ ! -e $image ]] && echo "Invalid image file" && exit 1

sudo losetup -o 1048576 -f $image
lodev=$(losetup | grep $1 | awk '{print $1}')

MOUNT_POINT="/tmp/$(basename "$image")"
mkdir -p $MOUNT_POINT
sudo mount -o ro $lodev $MOUNT_POINT || sudo losetup -D

echo "The image was mounted at '$MOUNT_POINT'"