1.\" Copyright (c) 1995 2.\" Peter Dufault, All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.\" $FreeBSD: src/share/man/man4/pt.4,v 1.8.2.3 2001/08/17 13:08:39 ru Exp $ 27.\" $DragonFly: src/share/man/man4/pt.4,v 1.5 2008/05/01 23:36:43 swildner Exp $ 28.\" 29.Dd March 2, 1995 30.Dt PT 4 31.Os 32.Sh NAME 33.Nm pt 34.Nd SCSI processor type driver 35.Sh SYNOPSIS 36.Cd device pt 37.Cd device pt1 at scbus0 target 3 unit 0 38.Sh DESCRIPTION 39The 40.Nm 41driver provides support for a 42.Tn SCSI 43processor type device. These are usually scanners and other 44devices using the 45.Tn SCSI 46link as a communication interface with device 47specific commands embedded in the data stream. 48.Pp 49A 50.Tn SCSI 51adapter must be separately configured into the system 52before this driver can be used. 53.Pp 54This device supports 55.Xr read 2 56and 57.Xr write 2 , 58and the 59.Xr ioctl 2 60calls described below. 61.Sh IOCTLS 62The following 63.Xr ioctl 2 64calls are supported by the 65.Nm 66driver. They are defined in the header file 67.In sys/ptio.h . 68.Bl -tag -width 012345678901234 69.It Dv PTIOCGETTIMEOUT 70This ioctl allows userland applications to fetch the current 71.Nm 72driver read and write timeout. The value returned is in seconds. 73.It Dv PTIOCSETTIMEOUT 74This ioctl allows userland applications to set the current 75.Nm 76driver read and write timeouts. The value should be in seconds. 77.El 78.Sh FILES 79.Bl -tag -width /dev/ptQQQ -compact 80.It Pa /dev/pt Ns Ar N 81the 82.Ar N Ns th processor device. 83.El 84.Sh SEE ALSO 85.Xr scsi 4 86.Sh HISTORY 87The 88.Nm 89driver appeared in 90.Fx 2.1 . 91