Интерактивная система просмотра системных руководств (man-ов)
pt (4)
>> pt (4) ( FreeBSD man: Специальные файлы /dev/* )
BSD mandoc
NAME
pt
- SCSI processor type driver
SYNOPSIS
device pt
DESCRIPTION
The
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
driver.
They are defined in the header file
In sys/ptio.h .
PTIOCGETTIMEOUT
This ioctl allows userland applications to fetch the current
driver read and write timeout.
The value returned is in seconds.
PTIOCSETTIMEOUT
This ioctl allows userland applications to set the current
driver read and write timeouts.
The value should be in seconds.
