#!/bin/bash
SECTOR_BYTES=512
SECTOR_START=2048
OFFSET=$(($SECTOR_BYTES*$SECTOR_START))
./build.sh
mkdir -p boot-part
mount -o rw,loop,offset=$OFFSET $1 ./boot-part
tar -xzvf build/rpi-cloud-init.tgz -C boot-part
umount ./boot-part
rmdir ./boot-part