#!/usr/bin/env bash
# Только U-Boot на eMMC (без перезаписи образа) — запускать на приставке под root
set -euo pipefail

DIR="$(cd "$(dirname "$0")" && pwd)"
UBOOT="${1:-${DIR}/../output/u-boot-custom.bin}"

if [[ $EUID -ne 0 ]]; then
  echo "Запустите: sudo $0 [u-boot-custom.bin]"
  exit 1
fi

[[ -f "$UBOOT" ]] || { echo "Нет файла: $UBOOT"; exit 1; }

EMMC=/dev/mmcblk2
BOOT0=/dev/mmcblk2boot0
BOOT1=/dev/mmcblk2boot1

echo "=== U-Boot only → $EMMC ==="
echo "Бинарник: $UBOOT"

echo 0 >/sys/block/mmcblk2boot0/force_ro
echo 0 >/sys/block/mmcblk2boot1/force_ro

dd if="$UBOOT" of="$EMMC" bs=1024 seek=8 conv=fsync
dd if="$UBOOT" of="$BOOT0" bs=1024 conv=fsync
dd if="$UBOOT" of="$BOOT1" bs=1024 conv=fsync
sync

echo "Готово."