pt(4)

NAME

pt - SCSI processor type driver

SYNOPSIS

device pt

DESCRIPTION

The pt driver provides support for a SCSI processor type de

vice. 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 pt driver.

They are
defined in the header file

PTIOCGETTIMEOUT This ioctl allows userland applications to

fetch the

current pt driver read and write timeout.

The value
returned is in seconds.

PTIOCSETTIMEOUT This ioctl allows userland applications to

set the cur

rent pt driver read and write timeouts.

The value
should be in seconds.

FILES

/dev/ptN the Nth processor device.

SEE ALSO

scsi(4)

HISTORY

The pt driver appeared in FreeBSD 2.1.

BSD March 2, 1995

BSD