NAME    [Toc]    [Back]

     pt -- SCSI processor type driver

SYNOPSIS    [Toc]    [Back]

     device pt

DESCRIPTION    [Toc]    [Back]

     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    [Toc]    [Back]

     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 current
 pt driver read and write timeouts.  The value
		      should be in seconds.

FILES    [Toc]    [Back]

     /dev/ptN	 the Nth processor device.

SEE ALSO    [Toc]    [Back]

     scsi(4)

HISTORY    [Toc]    [Back]

     The pt driver appeared in FreeBSD 2.1.


FreeBSD 5.2.1			 March 2, 1995			 FreeBSD 5.2.1