CLONE(M)                             UNIX System V



     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(S)]  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.


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


     See Also
          log(M)

          STREAMS Programmer's Guide


     (printed 2/15/90)                                   CLONE(M)