open any major/minor device pair on a STREAMS driver
clone is a STREAMS software driver that
finds and opens an
unused major/minor device on another STREAMS driver.
The major device number passed to clone
during open corresponds to the
clone driver and the minor device
number corresponds to the target driver.
Each open results in a separate stream to a previously
unused major/minor device.
The clone driver consists solely of an open function.
This open function performs all of the necessary
work so that subsequent system calls
further involvement of clone.
clone will generate an ENXIO error,
without opening the device, if the
major/minor device number provided does not
correspond to a valid major/minor device, or
if the driver indicated is not a STREAMS driver.
Multiple opens of the same major/minor
device cannot be done through the clone
on the file
system node for a cloned device yields a
different result from executing
fstat using a file descriptor obtained
from opening the node.
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 25 April 2004