 as of this writing) arg <code>native_recvmsg_flags</code>. (Rationale: We specifically omitted it in <a class="el" href="namespaceipc_1_1transport_1_1asio__local__stream__socket.html#a1022dfd42e9a0d6eab8384b0352decb0" title="boost.asio extension similar to peer_socket-&gt;non_blocking(true); auto n = peer_socket-&gt;write_some(pay...">nb_write_some_with_native_handle()</a>; yet add it here because the value <code>MSG_CMSG_CLOEXEC</code> has specific utility.) One may override the default (<code>0</code>) b