#!/bin/bash

if [[ -z $1 ]] || [[ -z $2 ]]; then
    echo "usage: $0 restore_file.xz device_to_restore_to"
    exit
fi

source_file=$1
if [[ ! -f $source_file ]]; then
    echo "cannot open $source_file"
    exit
fi

device=$2
timestamp=`date +%Y%m%d`

echo "about to restore $source_file onto $device"
echo "ctrl-c or [enter]"
read

sudo umount $device?
sudo umount $device

pv -tpreb $source_file | pixz -d | sudo dd bs=4M of=$device
sudo sync
sudo eject $device