NAME
pt – SCSI processor type driver
SYNOPSIS
device pt
DESCRIPTION
The pt 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
- 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 current pt driver read and write timeouts. The value should be in seconds.
The following ioctl(2) calls are supported by the pt driver. They are defined in the header file ⟨sys/ptio.h⟩.
FILES
- /dev/ptN
-
the Nth processor device.
SEE ALSO
HISTORY
The pt driver appeared in FreeBSD 2.1.