Messages in this thread |  | | | Date | Fri, 15 Feb 2002 15:51:43 -0700 | | From | Andreas Dilger <> | | Subject | Re: How to check the kernel compile options ? |
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On Feb 14, 2002 08:48 -0800, Randy.Dunlap wrote: > gziphdr=`binoffset $1 0x1f 0x8b 0x08 0x0` > # increment by 1 since tail offsets are 1-based, not 0-based > gziphdr=$((gziphdr + 1)) > > tail -c +$gziphdr $1 | gunzip > $1.tmp > strings $1.tmp | grep CONFIG_ > $1.old.config > rm $1.tmp
How about something like the below (avoids writing a multi-MB temp file):
HDR=`binoffset $1 0x1f 0x8b 0x08 0x0` dd if=$1 bs=1 skip=$HDR | zcat | strings /dev/stdin | grep CONFIG_ Note also that it is enough to store the config options without the leading CONFIG_ part, and then use 'grep "[A-Z0-9]*=[ym]$"' to get the actual config strings. You can add a final 'sed "s/^/CONFIG_/"' step to return it to the original format. So:
dd if=$1 bs=1 skip=$HDR | zcat | strings /dev/stdin | grep "[A-Z0-9]=[ym]$" \ | sed "s/^//CONFIG_" Cheers, Andreas -- Andreas Dilger http://sourceforge.net/projects/ext2resize/ http://www-mddsp.enel.ucalgary.ca/People/adilger/
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