#!/bin/sh
set -ex
IMG=$HOME/ext4.img
MNT=/ext4
if [ "$1" != 'mount' ]; then
rm -f $IMG
truncate --size 128M $IMG
fi
DEV=$(sudo losetup --find --show $IMG)
if [ "$1" != 'mount' ]; then
sudo mkfs.ext4 $DEV
sudo tune2fs -f -o journal_data $DEV
fi
sudo mkdir -p $MNT
sudo mount -o data=journal $DEV $MNT
sudo chown -R ubuntu:ubuntu $MNT