kernel26-2.6.12-alx-r9/scripts/extract-ikconfig

#!/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"

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"

    head --bytes="$end" "$file" | tail --bytes="$size" | 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="/tmp/ikconfig-$$"
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	niro	628	#!/bin/sh
2			# extracts .config info from a [b]zImage file
3			# uses: binoffset (new), dd, zcat, strings, grep
4			# $arg1 is [b]zImage filename
5
6			binoffset="./scripts/binoffset"
7
8			IKCFG_ST="0x49 0x4b 0x43 0x46 0x47 0x5f 0x53 0x54"
9			IKCFG_ED="0x49 0x4b 0x43 0x46 0x47 0x5f 0x45 0x44"
10			function dump_config {
11			typeset file="$1"
12
13			start=`$binoffset $file $IKCFG_ST 2>/dev/null`
14			[ "$?" != "0" ] && start="-1"
15			if [ "$start" -eq "-1" ]; then
16			return
17			fi
18			end=`$binoffset $file $IKCFG_ED 2>/dev/null`
19
20			let start="$start + 8"
21			let size="$end - $start"
22
23			head --bytes="$end" "$file" \| tail --bytes="$size" \| zcat
24
25			clean_up
26			exit 0
27			}
28
29
30			usage()
31			{
32			echo " usage: extract-ikconfig [b]zImage_filename"
33			}
34
35			clean_up()
36			{
37			if [ "$TMPFILE" != "" ]; then
38			rm -f $TMPFILE
39			fi
40			}
41
42			if [ $# -lt 1 ]
43			then
44			usage
45			exit 1
46			fi
47
48			TMPFILE="/tmp/ikconfig-$$"
49			image="$1"
50
51			# vmlinux: Attempt to dump the configuration from the file directly
52			dump_config "$image"
53
54			GZHDR1="0x1f 0x8b 0x08 0x00"
55			GZHDR2="0x1f 0x8b 0x08 0x08"
56
57			# vmlinux.gz: Check for a compressed images
58			off=`$binoffset "$image" $GZHDR1 2>/dev/null`
59			[ "$?" != "0" ] && off="-1"
60			if [ "$off" -eq "-1" ]; then
61			off=`$binoffset "$image" $GZHDR2 2>/dev/null`
62			[ "$?" != "0" ] && off="-1"
63			fi
64			if [ "$off" -eq "0" ]; then
65			zcat <"$image" >"$TMPFILE"
66			dump_config "$TMPFILE"
67			elif [ "$off" -ne "-1" ]; then
68			(dd ibs="$off" skip=1 count=0 && dd bs=512k) <"$image" 2>/dev/null \| \
69			zcat >"$TMPFILE"
70			dump_config "$TMPFILE"
71			fi
72
73			echo "ERROR: Unable to extract kernel configuration information."
74			echo " This kernel image may not have the config info."
75
76			clean_up
77			exit 1