#!/bin/bash

#
# mount script for qcow2 images
#             v0.1
#

# read imagename
if [ -z $1 ]; then
   echo 'usage: "browseqcow2 <image.qcow2>"'
   exit 1
fi

imagename=$1


# im i root
if [ $(whoami) != "root" ]; then
    echo "only root can do this"
    exit 1
fi

# run unmount
if [[ $1 = "--unmount" || $1 = "-u" || $1 = "--umount" ]]; then
    umount /mnt/
    qemu-nbd --disconnect /dev/nbd0
    echo "image unmounted"
    echo
    exit 0
fi

# load kernel module
modprobe nbd max_part=8

# gen blockdevice
qemu-nbd --connect=/dev/nbd0 $imagename

# make the actual mount
sleep 2
mount /dev/nbd0p1 /mnt/

echo "$imagename is mounted in /mnt"
echo 'run "browseqcow2.sh --unmount" when ready'
echo