clone(7)          UNIX System V(Networking Support Utilities)          clone(7)


NAME
      clone - open any major/minor device pair on a STREAMS driver

DESCRIPTION
      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
      [including close(2)] require no 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.

SEE ALSO
      log(7)
      Programmer's Guide: STREAMS

NOTES
      Multiple opens of the same major/minor device cannot be done through the
      clone interface.  Executing stat(2) on the file system node for a cloned
      device yields a different result from executing fstat(2) using a file
      descriptor obtained from opening the node.



























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