plan9fox/rc/bin/inst/isventi

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#!/bin/rc
if(! ~ $#* 1){
echo 'usage: isventi /dev/sdC0/part' >[1=2]
exit usage
}
arg=$1
if(! cmp -s <{dd -quiet 1 -if $arg -bs 1024 -iseek 248 |
dd -quiet 1 -bs 13 -count 1} <{echo 'venti config'})
exit noconfig
exit 0