#!/bin/bash

set -ex

if [[ "$1" != "--yes-this-is-dangerous" ]]; then
    echo "Refusing to continue, re-run with the --yes-this-is-dangerous option to proceed"
    exit 1
fi

echo 0 > /sys/block/mmcblk0boot0/force_ro
echo 0 > /sys/block/mmcblk0boot1/force_ro
ddrescue --force /usr/libexec/u-boot-spl.kwb /dev/mmcblk0boot0
ddrescue --force /usr/libexec/u-boot-spl.kwb /dev/mmcblk0boot1
dd if=/usr/libexec/u-boot-spl.kwb of=/dev/mmcblk0 bs=512 seek=1
sync
echo 1 > /sys/block/mmcblk0boot1/force_ro
echo 1 > /sys/block/mmcblk0boot0/force_ro