l() == false</code>. (If you want to send a non-empty buffer but no handle, then just use boost.asio <code>Peer_socket::write_some()</code>. As of this writing the relevant OS shall not support receive a handle but a null buffer.)</p>
<p >The function exits without blocking. The sending occurs synchronously, if possible, or does not occur otherwise. A successful operation is defined as sending 1+ bytes of the blob; and the native handle. It is not possible that the native handle is transmitted but 0 bytes o