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.\" $FreeBSD$ 27.\" 28.Dd March 2, 1995 29.Dt PT 4 30.Os 31.Sh NAME 32.Nm pt 33.Nd SCSI processor type driver 34.Sh SYNOPSIS 35.Cd device pt 36.Sh DESCRIPTION 37The 38.Nm 39driver provides support for a 40.Tn SCSI 41processor type device. 42These are usually scanners and other devices using the 43.Tn SCSI 44link as a communication interface with device 45specific commands embedded in the data stream. 46.Pp 47A 48.Tn SCSI 49adapter must be separately configured into the system 50before this driver can be used. 51.Pp 52This device supports 53.Xr read 2 54and 55.Xr write 2 , 56and the 57.Xr ioctl 2 58calls described below. 59.Sh IOCTLS 60.Bl -tag -width 012345678901234 61The following 62.Xr ioctl 2 63calls are supported by the 64.Nm 65driver. 66They are defined in the header file 67.In sys/ptio.h . 68.Pp 69.It PTIOCGETTIMEOUT 70This ioctl allows userland applications to fetch the current 71.Nm 72driver read and write timeout. 73The value returned is in seconds. 74.It PTIOCSETTIMEOUT 75This ioctl allows userland applications to set the current 76.Nm 77driver read and write timeouts. 78The value should be in seconds. 79.El 80.Sh FILES 81.Bl -tag -width /dev/ptQQQ -compact 82.It Pa /dev/pt Ns Ar N 83the 84.Ar N Ns th processor device. 85.El 86.Sh SEE ALSO 87.Xr scsi 4 88.Sh HISTORY 89The 90.Nm 91driver appeared in 92.Fx 2.1 . 93