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Alexey Dobriyan 008accbbae [PATCH] extract-ikconfig: don't use --long-options

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2006-03-24 07:33:21 -08:00

1.7 KiB

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#!/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" function dump_config { typeset 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`

let start="$start + 8"
let size="$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 1 fi

TMPFILE=mktemp -t ikconfig-XXXXXX || exit 1 image="$1"

vmlinux: Attempt to dump the configuration from the file directly

dump_config "$image"

GZHDR1="0x1f 0x8b 0x08 0x00" GZHDR2="0x1f 0x8b 0x08 0x08"

vmlinux.gz: Check for a compressed images

off=$binoffset "$image" $GZHDR1 2>/dev/null [ "$?" != "0" ] && off="-1" if [ "$off" -eq "-1" ]; then off=$binoffset "$image" $GZHDR2 2>/dev/null [ "$?" != "0" ] && off="-1" fi if [ "$off" -eq "0" ]; then zcat <"$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" fi

echo "ERROR: Unable to extract kernel configuration information." echo " This kernel image may not have the config info."

clean_up exit 1

1.7 KiB Executable File Raw Blame History