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PT(4)		       FreeBSD Kernel Interfaces Manual			 PT(4)

NAME
     pt	-- SCSI	processor type driver

SYNOPSIS
     device pt
     device pt1	at scbus0 target 3 unit	0

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
     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 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.

FreeBSD	10.1			 March 2, 1995			  FreeBSD 10.1

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

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