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| author | Dick Streefland <dick@streefland.net> | 2010-10-23 00:02:44 +0200 |
|---|---|---|
| committer | Michal Marek <mmarek@suse.cz> | 2010-10-28 00:22:17 +0200 |
| commit | 532cf2907ac3b9c2345d76251764f4f4e602c921 (patch) | |
| tree | 1493be6fe2749d6c1cc785dd5655243048952c82 | |
| parent | kbuild: check return value of asprintf() (diff) | |
| download | linux-532cf2907ac3b9c2345d76251764f4f4e602c921.tar.xz linux-532cf2907ac3b9c2345d76251764f4f4e602c921.zip | |
scripts/extract-ikconfig: add support for bzip2, lzma and lzo
Add support for kernels compressed with bzip2, lzma or lzo to the
extract-ikconfig script.
Fixes kernel bugzilla #19852:
https://bugzilla.kernel.org/show_bug.cgi?id=19852
Signed-off-by: Dick Streefland <dick@streefland.net>
Tested-by: Justin <jlec@gentoo.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
| -rwxr-xr-x | scripts/extract-ikconfig | 41 |
1 files changed, 27 insertions, 14 deletions
diff --git a/scripts/extract-ikconfig b/scripts/extract-ikconfig index 37f30d36c944..1512c0a755ac 100755 --- a/scripts/extract-ikconfig +++ b/scripts/extract-ikconfig @@ -7,12 +7,10 @@ # 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, Dick Streefland <dick@streefland.net> +# (c) 2009,2010 Dick Streefland <dick@streefland.net> # Licensed under the terms of the GNU General Public License. # ---------------------------------------------------------------------- -gz1='\037\213\010' -gz2='01' cf1='IKCFG_ST\037\213\010' cf2='0123456789' @@ -21,11 +19,25 @@ dump_config() if pos=`tr "$cf1\n$cf2" "\n$cf2=" < "$1" | grep -abo "^$cf2"` then pos=${pos%%:*} - tail -c+$(($pos+8)) "$1" | zcat -q - exit 0 + tail -c+$(($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 @@ -35,18 +47,19 @@ then 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 decompress and try again: -tmp=/tmp/ikconfig$$ -trap "rm -f $tmp" 0 -for pos in `tr "$gz1\n$gz2" "\n$gz2=" < "$img" | grep -abo "^$gz2"` -do - pos=${pos%%:*} - tail -c+$pos "$img" | zcat 2> /dev/null > $tmp - dump_config $tmp -done +# That didn't work, so retry after decompression. +try_decompress '\037\213\010' xy gunzip +try_decompress 'BZh' xy bunzip2 +try_decompress '\135\0\0\0' xxx unlzma +try_decompress '\211\114\132' xy 'lzop -d' # Bail out: echo "$me: Cannot find kernel config." >&2 |