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linux-next/scripts/extract-ikconfig
Werner Almesberger efddd79512 remove bashisms from scripts/extract-ikconfig
unbashify-extract-ikconfig.patch

scripts/extract-ikconfig contains a lot of gratuituous bashisms,
which make it fail if /bin/sh isn't bash. This patch replaces them
with regular Bourne shell constructs.

Signed-off-by: Werner Almesberger <werner@openmoko.org>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com> # as file author
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2008-12-03 21:32:02 +01:00

79 lines
1.7 KiB
Bash
Executable File

#!/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`
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 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