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File Content: `extract-ikconfig`

#!/usr/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=$1
if	[ $# -ne 1 -o ! -s "$img" ]
then
	echo "Usage: $me <kernel-image>" >&2
	exit 2
fi

# Prepare temp files:
tmp1=/tmp/ikconfig$$.1
tmp2=/tmp/ikconfig$$.2
trap "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    gunzip
try_decompress '\3757zXZ\000' abcde unxz
try_decompress 'BZh'          xy    bunzip2
try_decompress '\135\0\0\0'   xxx   unlzma
try_decompress '\211\114\132' xy    'lzop -d'
try_decompress '\002\041\114\030' xyy 'lz4 -d -l'

# Bail out:
echo "$me: Cannot find kernel config." >&2
exit 1

Name	Size	Permission
atomic	---	0755
basic	---	0755
clang-tools	---	0755
coccinelle	---	0755
dtc	---	0755
dummy-tools	---	0755
gcc-plugins	---	0755
gdb	---	0755
genksyms	---	0755
kconfig	---	0755
ksymoops	---	0755
mod	---	0755
package	---	0755
selinux	---	0755
Kbuild.include	10490 bytes	0644
Kconfig.include	2626 bytes	0644
Lindent	506 bytes	0755
Makefile	1757 bytes	0644
Makefile.asm-generic	1865 bytes	0644
Makefile.btf	1094 bytes	0644
Makefile.build	17511 bytes	0644
Makefile.clean	2067 bytes	0644
Makefile.compiler	2861 bytes	0644
Makefile.dtbinst	998 bytes	0644
Makefile.extrawarn	3330 bytes	0644
Makefile.gcc-plugins	2629 bytes	0644
Makefile.headersinst	2950 bytes	0644
Makefile.host	4743 bytes	0644
Makefile.kasan	2511 bytes	0644
Makefile.kcov	333 bytes	0644
Makefile.kcsan	1004 bytes	0644
Makefile.kmsan	208 bytes	0644
Makefile.lib	21502 bytes	0644
Makefile.modfinal	2801 bytes	0644
Makefile.modinst	2444 bytes	0644
Makefile.modpost	4263 bytes	0644
Makefile.package	6771 bytes	0644
Makefile.randstruct	410 bytes	0644
Makefile.ubsan	837 bytes	0644
Makefile.userprogs	1607 bytes	0644
Makefile.vmlinux	890 bytes	0644
Makefile.vmlinux_o	2603 bytes	0644
adjust_autoksyms.sh	2158 bytes	0755
as-version.sh	2103 bytes	0755
asn1_compiler	30856 bytes	0755
asn1_compiler.c	36169 bytes	0644
bin2c.c	743 bytes	0644
bloat-o-meter	3442 bytes	0755
bootgraph.pl	5776 bytes	0755
bpf_doc.py	32496 bytes	0755
cc-can-link.sh	170 bytes	0755
cc-version.sh	1386 bytes	0755
check-sysctl-docs	4472 bytes	0755
check_extable.sh	5051 bytes	0755
checkdeclares.pl	1123 bytes	0644
checkincludes.pl	1984 bytes	0755
checkkconfigsymbols.py	16257 bytes	0755
checkpatch.pl	228875 bytes	0755
checkstack.pl	6037 bytes	0755
checksyscalls.sh	7518 bytes	0755
checkversion.pl	2206 bytes	0755
cleanfile	3538 bytes	0755
cleanpatch	5178 bytes	0755
coccicheck	8079 bytes	0755
config	4780 bytes	0755
const_structs.checkpatch	1009 bytes	0644
decode_stacktrace.sh	6714 bytes	0755
decodecode	2956 bytes	0755
depmod.sh	1445 bytes	0755
dev-needs.sh	6222 bytes	0755
diffconfig	4219 bytes	0755
documentation-file-ref-check	5733 bytes	0755
export_report.pl	4601 bytes	0755
extract-cert	14456 bytes	0755
extract-cert.c	3720 bytes	0644
extract-ikconfig	1738 bytes	0755
extract-module-sig.pl	3742 bytes	0755
extract-sys-certs.pl	3832 bytes	0755
extract-vmlinux	1699 bytes	0755
extract_xc3028.pl	45682 bytes	0755
faddr2line	6305 bytes	0755
file-size.sh	90 bytes	0755
find-unused-docs.sh	1308 bytes	0755
gcc-ld	715 bytes	0755
gcc-x86_32-has-stack-protector.sh	412 bytes	0755
gcc-x86_64-has-stack-protector.sh	202 bytes	0755
gen_autoksyms.sh	1431 bytes	0755
gen_ksymdeps.sh	403 bytes	0755
generate_initcall_order.pl	6086 bytes	0755
generate_rust_target.rs	5384 bytes	0644
get_abi.pl	15457 bytes	0755
get_dvb_firmware	25124 bytes	0755
get_feat.pl	14689 bytes	0755
get_maintainer.pl	68740 bytes	0755
gfp-translate	1754 bytes	0755
headerdep.pl	3582 bytes	0755
headers_check.pl	3815 bytes	0755
headers_install.sh	3246 bytes	0755
insert-sys-cert.c	9084 bytes	0644
install.sh	990 bytes	0755
jobserver-exec	2210 bytes	0755
kallsyms	18672 bytes	0755
kallsyms.c	20869 bytes	0644
kernel-doc	67911 bytes	0755
ld-version.sh	1713 bytes	0755
leaking_addresses.pl	13108 bytes	0755
link-vmlinux.sh	9097 bytes	0755
makelst	812 bytes	0755
markup_oops.pl	8106 bytes	0755
min-tool-version.sh	473 bytes	0755
mkcompile_h	2648 bytes	0755
mksysmap	1364 bytes	0755
mkuboot.sh	418 bytes	0755
module.lds	432 bytes	0644
module.lds.S	1523 bytes	0644
modules-check.sh	431 bytes	0755
nsdeps	1673 bytes	0644
objdiff	2897 bytes	0755
objdump-func	715 bytes	0755
pahole-version.sh	273 bytes	0755
parse-maintainers.pl	4646 bytes	0755
patch-kernel	10188 bytes	0755
profile2linkerlist.pl	410 bytes	0755
prune-kernel	712 bytes	0755
recordmcount.c	17091 bytes	0644
recordmcount.h	19832 bytes	0644
recordmcount.pl	18030 bytes	0755
remove-stale-files	1384 bytes	0755
setlocalversion	3673 bytes	0755
show_delta	3085 bytes	0755
sign-file	22688 bytes	0755
sign-file.c	10166 bytes	0644
sorttable	22648 bytes	0755
sorttable.c	7807 bytes	0644
sorttable.h	13157 bytes	0644
spdxcheck-test.sh	323 bytes	0644
spelling.txt	32681 bytes	0644
sphinx-pre-install	24870 bytes	0755
split-man.pl	600 bytes	0755
stackdelta	1883 bytes	0755
stackusage	798 bytes	0755
subarch.include	641 bytes	0644
syscallhdr.sh	1939 bytes	0755
syscallnr.sh	1485 bytes	0644
syscalltbl.sh	1493 bytes	0755
tags.sh	9889 bytes	0755
test_fortify.sh	2281 bytes	0644
tools-support-relr.sh	550 bytes	0755
unifdef	34936 bytes	0755
unifdef.c	35637 bytes	0644
ver_linux	2648 bytes	0755
xen-hypercalls.sh	386 bytes	0644
xz_wrap.sh	567 bytes	0755

File Content: extract-ikconfig

File Content: `extract-ikconfig`