ref: dfdaa7afe9b0bde9e38b3da22d774bb8ccd6677f
dir: /sys/lib/dist/pc/inst/isventiisect/
#!/bin/rc
if(! ~ $#* 1){
echo 'usage: isventiisect /dev/sdC0/part' >[1=2]
exit usage
}
arg=$1
if(! cmp -s <{dd -quiet 1 -if $arg -bs 1024 -iseek 256 |
dd -quiet 1 -bs 4 -count 1 | xd -b | sed 1q} <{echo '0000000 d1 5c 5e c7'})
exit notisect
exit 0