clone(7)                   DG/UX 4.30                    clone(7)



     NAME
          clone - open any minor device on a STREAMS driver

     DESCRIPTION
          clone is a STREAMS software driver that finds and opens an
          unused minor device on another STREAMS driver.  The minor
          device passed to clone during the open is interpreted as the
          major device number of another STREAMS driver for which an
          unused minor device is to be obtained.  Each such open
          results in a separate stream to a previously unused 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 minor device number provided does not
          correspond to a valid major device, or if the driver
          indicated is not a STREAMS driver.

     CAVEATS
          Multiple opens of the same 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.

     SEE ALSO
          log(7).
          STREAMS Programmer's Guide for the DG/UX System.























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