#!/bin/sh

# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2018-present Team LibreELEC (https://libreelec.tv)

[ -z "$SYSTEM_ROOT" ] && SYSTEM_ROOT=""
[ -z "$BOOT_ROOT" ] && BOOT_ROOT="/flash"
[ -z "$BOOT_PART" ] && BOOT_PART=$(df "$BOOT_ROOT" | tail -1 | awk {' print $1 '})

# identify the boot device
  if [ -z "$BOOT_DISK" ]; then
    case $BOOT_PART in
      /dev/sd[a-z][0-9]*)
        BOOT_DISK=$(echo $BOOT_PART | sed -e "s,[0-9]*,,g")
        ;;
      /dev/mmcblk*)
        BOOT_DISK=$(echo $BOOT_PART | sed -e "s,p[0-9]*,,g")
        ;;
    esac
  fi

# mount $BOOT_ROOT rw
  mount -o remount,rw $BOOT_ROOT

# update extlinux device trees
  if [ -f $BOOT_ROOT/extlinux/extlinux.conf ]; then
    for dtbfile in $BOOT_ROOT/*.dtb ; do
      dtb=$(basename $dtbfile)
      echo "Updating $dtb"
      cp -p $SYSTEM_ROOT/usr/share/bootloader/$dtb $BOOT_ROOT/ 2>/dev/null || true
    done
  fi

# mount $BOOT_ROOT ro
  sync
  mount -o remount,ro $BOOT_ROOT