config root man

#!/bin/sh
#
# Copyright (c) 2010 The FreeBSD Foundation
# All rights reserved.
#
# This software was developed by Semihalf under sponsorship from
# the FreeBSD Foundation.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# SUCH DAMAGE.
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# $FreeBSD: release/9.1.0/sys/tools/fdt/embed_dtb.sh 208749 2010-06-02 17:22:38Z raj $

# $1: kernel filename
# $2: device tree blob filename

dtbsize=`ls -l $2 | awk '{print $5}'`
obs=`strings -at d $1 | grep "Device Tree Blob STARTS here" | awk '{print $1}'`
eol=`strings -at d $1 | grep "Device Tree Blob STOPS here" | awk '{print $1}'`
sz=$((eol - obs));
if [ $sz -lt $dtbsize ]
then
	echo "Selected blob is too big to reembed. Please rebuild the kernel."
	exit
fi
dd if=$2 ibs=${dtbsize} of=$1 obs=${obs} oseek=1 conv=notrunc 2> /dev/null