osx man page for fdetach

fdetach(1M)															       fdetach(1M)

NAME
       fdetach - detach a name from a STREAMS-based file descriptor

SYNOPSIS
       fdetach path

       The  fdetach command detaches a STREAMS-based file descriptor from a name in the file system. Use the path operand to specify the path name
       of the object in the file system name space, which was previously attached. See fattach(3C).

       The user must be the owner of the file or a user with the appropriate privileges. All subsequent operations on path  will  operate  on  the
       underlying  file  system  entry and not on the STREAMS file. The permissions and status of the entry are restored to the state they were in
       before the STREAMS file was attached to the entry.

       The following operands are supported:

       path	Specifies the path name of the object in the file system name space, which was previously attached.

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

       fattach(3C), fdetach(3C), attributes(5), streamio(7I)

								    5 Jul 1990							       fdetach(1M)