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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970#!/bin/sh# ----------------------------------------------------------------------# extract-ikconfig - Extract the .config file from a kernel image## This will only work when the kernel was compiled with CONFIG_IKCONFIG.## The obscure use of the "tr" filter is to work around older versions of# "grep" that report the byte offset of the line instead of the pattern.## (c) 2009,2010 Dick Streefland <dick@streefland.net># Licensed under the terms of the GNU General Public License.# ----------------------------------------------------------------------
cf1='IKCFG_ST\037\213\010'cf2='0123456789'
dump_config(){ if pos=`tr "$cf1\n$cf2" "\n$cf2=" < "$1" | grep -abo "^$cf2"` then pos=${pos%%:*} tail -c+$(($pos+8)) "$1" | zcat > $tmp1 2> /dev/null if [ $? != 1 ] then # exit status must be 0 or 2 (trailing garbage warning) cat $tmp1 exit 0 fi fi}
try_decompress(){ for pos in `tr "$1\n$2" "\n$2=" < "$img" | grep -abo "^$2"` do pos=${pos%%:*} tail -c+$pos "$img" | $3 > $tmp2 2> /dev/null dump_config $tmp2 done}
# Check invocation:me=${0##*/}img=$1if [ $# -ne 1 -o ! -s "$img" ]then echo "Usage: $me <kernel-image>" >&2 exit 2fi
# Prepare temp files:tmp1=/tmp/ikconfig$$.1tmp2=/tmp/ikconfig$$.2trap "rm -f $tmp1 $tmp2" 0
# Initial attempt for uncompressed images or objects:dump_config "$img"
# That didn't work, so retry after decompression.try_decompress '\037\213\010' xy gunziptry_decompress '\3757zXZ\000' abcde unxztry_decompress 'BZh' xy bunzip2try_decompress '\135\0\0\0' xxx unlzmatry_decompress '\211\114\132' xy 'lzop -d'try_decompress '\002\041\114\030' xyy 'lz4 -d -l'try_decompress '\050\265\057\375' xxx unzstd
# Bail out:echo "$me: Cannot find kernel config." >&2exit 1