#! /bin/bash
  #
  # Copyright (C) 2016, Lukasz Majewski <l.majewski@majess.pl>
  #
  # SPDX-License-Identifier:      GPL-2.0+
  #
  
  # This file extracts default envs from built u-boot
  # usage: get_default_envs.sh > u-boot-env-default.txt
  set -ue
  
  ENV_OBJ_FILE="env_common.o"
  ENV_OBJ_FILE_COPY="copy_${ENV_OBJ_FILE}"
  
  echoerr() { echo "$@" 1>&2; }
  
  path=$(readlink -f $0)
  env_obj_file_path=$(find ${path%/scripts*} -not -path "*/spl/*" \
  			 -name "${ENV_OBJ_FILE}")
  [ -z "${env_obj_file_path}" ] && \
      { echoerr "File '${ENV_OBJ_FILE}' not found!"; exit 1; }
  
  cp ${env_obj_file_path} ${ENV_OBJ_FILE_COPY}
  
  # NOTE: objcopy saves its output to file passed in
  # (copy_env_common.o in this case)
  objcopy -O binary -j ".rodata.default_environment" ${ENV_OBJ_FILE_COPY}
  
  # Replace default '\0' with '
  ' and sort entries
  tr '\0' '
  ' < ${ENV_OBJ_FILE_COPY} | sort -u
  
  rm ${ENV_OBJ_FILE_COPY}
  
  exit 0