#!/bin/sh# extracts .config info from a [b]zImage file# uses: binoffset (new), dd, zcat, strings, grep# $arg1 is [b]zImage filename binoffset="./scripts/binoffset"test -e $binoffset || cc -o $binoffset ./scripts/binoffset.c || exit 1 IKCFG_ST="0x49 0x4b 0x43 0x46 0x47 0x5f 0x53 0x54"IKCFG_ED="0x49 0x4b 0x43 0x46 0x47 0x5f 0x45 0x44"dump_config() {    file="$1"     start=`$binoffset $file $IKCFG_ST 2>/dev/null`    [ "$?" != "0" ] && start="-1"    if [ "$start" -eq "-1" ]; then	return    fi    end=`$binoffset $file $IKCFG_ED 2>/dev/null`    [ "$?" != "0" ] && end="-1"    if [ "$end" -eq "-1" ]; then	return    fi     start=`expr $start + 8`    size=`expr $end - $start`     dd if="$file" ibs=1 skip="$start" count="$size" 2>/dev/null | zcat     clean_up    exit 0}  usage(){	echo "  usage: extract-ikconfig [b]zImage_filename"} clean_up(){	if [ "$TMPFILE" != "" ]; then		rm -f $TMPFILE	fi} if [ $# -lt 1 ]then	usage	exit 1fi TMPFILE=`mktemp -t ikconfig-XXXXXX` || exit 1image="$1" # vmlinux: Attempt to dump the configuration from the file directlydump_config "$image" GZHDR1="0x1f 0x8b 0x08 0x00"GZHDR2="0x1f 0x8b 0x08 0x08" ELFHDR="0x7f 0x45 0x4c 0x46" # vmlinux.gz: Check for a compressed imagesoff=`$binoffset "$image" $GZHDR1 2>/dev/null`[ "$?" != "0" ] && off="-1"if [ "$off" -eq "-1" ]; then	off=`$binoffset "$image" $GZHDR2 2>/dev/null`	[ "$?" != "0" ] && off="-1"fiif [ "$off" -eq "0" ]; then	zcat <"$image" >"$TMPFILE"	dump_config "$TMPFILE"elif [ "$off" -ne "-1" ]; then	(dd ibs="$off" skip=1 count=0 && dd bs=512k) <"$image" 2>/dev/null | \		zcat >"$TMPFILE"	dump_config "$TMPFILE" # check if this is simply an ELF fileelse	off=`$binoffset "$image" $ELFHDR 2>/dev/null`	[ "$?" != "0" ] && off="-1"	if [ "$off" -eq "0" ]; then		dump_config "$image"	fifi echo "ERROR: Unable to extract kernel configuration information."echo "       This kernel image may not have the config info." clean_upexit 1