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clone(7)


NAME

  clone - Opens a major and minor device pair on a STREAMS driver


DESCRIPTION

  The clone driver is a "pass through" device driver that allows other
  drivers to select unique minor device numbers on each open. In effect, the
  driver passes an open operation through to the other driver. This mechanism
  allows for multiple instantiations of a driver through a single file system
  node.

  The name parameter specifies the name of the special device driver to be
  opened. The clone driver calls the open routine of the other driver with
  flags that specify a clone open, and sets up the new instantiation using
  the returned major/minor pair. The new major number is the minor number of
  the clonable entry, and the minor number has been dynamically selected.

  If the clone driver has an invalid minor number, or if the driver indicated
  is not a clonable driver, an error occurs.

  The master devices for pseudoterminals are examples of clonable drivers
  (see the pty(7) reference page).


SEE ALSO

  Functions: fstat(2), open(2)

  Interfaces: pty(7)

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