NAME
pt —
SCSI processor type driver
SYNOPSIS
device pt
device pt1 at scbus0 target 3 unit 0
DESCRIPTION
Thept 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 pt
driver. They are defined in the header file
<sys/ptio.h>.
PTIOCGETTIMEOUT- This ioctl allows userland applications to fetch the current
ptdriver read and write timeout. The value returned is in seconds. PTIOCSETTIMEOUT- This ioctl allows userland applications to set the current
ptdriver read and write timeouts. The value should be in seconds.
FILES
- /dev/ptN
- the Nth processor device.
SEE ALSO
HISTORY
The pt driver appeared in
FreeBSD 2.1.