git: 9front

ref: 2f4e6dd1a8b367044948f75f62b51aae2a944dd2
dir: /rc/bin/inst/isfossil/

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#!/bin/rc

if(! ~ $#* 1){
	echo 'usage: isfossil /dev/sdC0/part' >[1=2]
	exit usage
}

arg=$1
if(! cmp -s <{dd -quiet 1 -if $arg -bs 1024 -iseek 127 |
	dd -quiet 1 -bs 14 -count 1} <{echo 'fossil config'})
	exit noconfig
if(! cmp -s <{dd -quiet 1 -if $arg -bs 1024 -iseek 128 |
	dd -quiet 1 -bs 4 -count 1 | xd -b | sed 1q} <{echo '0000000  37 76 ae 89'})
	exit notwritebuffer
exit 0