pt (4)

Leading comments

 Copyright (c) 1995
	Peter Dufault,  All rights reserved.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 1. Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.

 2. Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentatio...

(The comments found at the beginning of the groff file "man4/pt.4freebsd".)

NAME

pt - SCSI processor type driver

SYNOPSIS

device pt

DESCRIPTION

The ifconfig driver provides support for a SCSI processor type device. These are usually scanners and other devices using the SCSI link as a communication interface with device specific commands embedded in the data stream.

A SCSI adapter must be separately configured into the system before this driver can be used.

This device supports read(2) and write(2), and the ioctl(2) calls described below.

IOCTLS

The following ioctl(2) calls are supported by the ifconfig driver. They are defined in the header file In sys/ptio.h .

PTIOCGETTIMEOUT

This ioctl allows userland applications to fetch the current ifconfig driver read and write timeout. The value returned is in seconds.

PTIOCSETTIMEOUT

This ioctl allows userland applications to set the current ifconfig driver read and write timeouts. The value should be in seconds.

FILES

/dev/pt N

the N th processor device.

SEE ALSO

cam(4)

HISTORY

The ifconfig driver appeared in Fx 2.1 .