.\"	$NetBSD: uk.4,v 1.11 2010/03/22 18:58:31 joerg Exp $
.\"
.\" Copyright (c) 1996
.\"     Julian Elischer <julian@freebsd.org>.  All rights reserved.
.\"
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.Dd October 11, 1993
.Dt UK 4
.Os
.Sh NAME
.Nm uk
.Nd SCSI user-level driver
.Sh SYNOPSIS
.Cd "uk* at scsibus? target ? lun ?"
.Sh DESCRIPTION
The
.Nm
driver provides support for a process to address devices on the
.Tn SCSI
bus for which there is no configured driver.
.Pp
A
.Tn SCSI
adapter must also be separately configured into the system before
this driver makes sense.
.Sh KERNEL CONFIGURATION
If a
.Ar count
is given, that number of
.Nm
devices will be configured into the
.Nx
kernel.
.Sh IOCTLS
The
.Nm
driver has no ioctls of its own but rather acts as a medium for the generic
.Xr scsi 4
ioctls.
These are described in
.In sys/scsiio.h .
.Sh FILES
.Bl -tag -width /dev/uk[0-255] -compact
.It Pa /dev/uk[0-255]
unknown
.Tn SCSI
devices.
.El
.Sh DIAGNOSTICS
All
.Xr scsi 4
debug ioctls work on
.Nm
devices.
.Sh SEE ALSO
.Xr ioctl 2 ,
.Xr cd 4 ,
.Xr ch 4 ,
.Xr scsi 4 ,
.Xr sd 4 ,
.Xr ss 4 ,
.Xr st 4
.Sh HISTORY
The
.Nm
driver appeared in
.Tn 386BSD 0.1 .