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PT(4)			 BSD Kernel Interfaces Manual			 PT(4)

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 communi-
     cation 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 de-
     scribed 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 pt driver	read and write timeout.	 The value re-
		      turned 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

NAME | SYNOPSIS | DESCRIPTION | IOCTLS | FILES | SEE ALSO | HISTORY

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