synchronous_operations/automatic_deduction_of_initiating_function_return_type.html" title="Automatic deduction of initiating function return type"><span class="emphasis"><em>DEDUCED</em></span></a> async_read_some(
    const MutableBufferSequence &amp; buffers,
    ReadHandler &amp;&amp; handler);
</pre>
<p>
          This function is used to asynchronously read data from the stream descriptor.
          The function call always returns immediately.
        </p>
<h6>
<a name="boost_asio.reference.posix__str