.\"	$OpenBSD: mksuncd.1,v 1.2 2008/08/23 07:08:06 jmc Exp $
.\"
.\" Copyright (c) 2001 Jason L. Wright (jason@thought.net)
.\" All rights reserved.
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.Dd $Mdocdate: August 23 2008 $
.Dt MKSUNCD 1
.Os
.Sh NAME
.Nm mksuncd
.Nd add a bootable UFS partition to a filesystem image
.Sh SYNOPSIS
.Nm mksuncd
.Ar partition-letter
.Ar imagefile
.Ar ufsfile
.Sh DESCRIPTION
The
.Nm
utility adds the file
.Ar ufsfile
to the end of
.Ar imagefile .
.Ar ufsfile
is assumed to be a bootable filesystem image and
.Ar imagefile
is assumed to be something like an ISO 9660 filesystem.
A Sun-style disklabel is expected to already be present
at the beginning of
.Ar imagefile ,
and
.Nm
will update that label so that the partition (a-h) given by
.Ar partition-letter
points to
.Ar ufsfile
within
.Ar imagefile .
.Pp
Based on the label in
.Ar imagefile ,
that file is padded so that added files are always on cylinder boundaries.
This is a requirement of the PROM.
.Sh BUGS
This program is not endian or type safe.
It makes several assumptions about both based on its
SPARC bias.