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

	This routine returns the calling process' current user name.
	This routine differs from my_user_name in that it returns
	the user-entered login name for public consoles.

	user_name	returned null terminated user name
			(USER_NAME_LEN + 1 characters)

	This function returns status values as follows:

	OK			success
	CLIB_GENERR		failed to determine the user name

	This function requires the following include files:

	cnsparam_h, clib_h, acnet_errors_h

	Related functions:

	my_user_name, retrieve_validated_user_name, my_user_id,
	my_current_user_email, my_executable_name_c, my_generic_ascii_name,
	my_gen_name, myname, my_ascii_name, mynode, myconsole, myinstance,
	myslot, mypage, clib_environment, my_acnet_user_name,

	C/C++ usage:

	char	user_name[USER_NAME_LEN+1];
	int	status;

	status = my_current_user_name(user_name);