status.i4.v = my_acnet_user_name(user_name.i1a.r)

	This routine returns the user's Acnet user name.  It can be used as the
	key for saving/reading things on a per user basis.

	user_name	returned null terminated Acnet user name
			(USER_NAME_LEN + 1 characters)
			For public consoles this will be the X server name
			such as "cns4pc".  For private consoles this will
			be the user's login name.

	This function returns status values as follows:

	OK			success
	CLIB_GENERR 		failed to determine the Acnet user name

	This function requires the following include files:

	cnsparam_h, clib_h, acnet_errors_h

	Related functions:

	my_executable_name_c, my_generic_ascii_name, my_gen_name, myname,
	my_ascii_name, mynode, myconsole, myinstance, myslot, mypage,
	clib_environment, my_user_name, my_user_id, my_control_system_name

	C/C++ usage:

	char	user_name[USER_NAME_LEN+1];
	int	status;

	status = my_acnet_user_name(user_name);