plan9 man page for clone

CLONE(5)							File Formats Manual							  CLONE(5)

NAME
       clone - duplicate a fid

SYNOPSIS
       Tclone  tag[2] fid[2] newfid[2]
       Rclone  tag[2] fid[2]

DESCRIPTION
       The clone request carries as arguments an existing fid and a proposed newfid (which must not be in use) that the client wishes to associate
       with the same file as fid.  The fid must be valid in the current session and must not have been opened for I/O by an open  or  create  mes-
       sage.  After a successful clone and before any subsequent messages, fid and newfid are indistinguishable.

ENTRY POINTS
       A clone message is generated by any system call that evaluates a path name and by a read of a union directory.

																	  CLONE(5)