#! /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 '\n' and sort entries

tr '\0' '\n' < ${ENV_OBJ_FILE_COPY} | sort -u

rm ${ENV_OBJ_FILE_COPY}

exit 0