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<span id="Call-Unix-select-on-Octave-streams"></span><h3 class="section">4.2 Call Unix <code>select</code> on Octave streams</h3>
<span id="index-select-1"></span>
<p>Note that for cluster connections <a href="select_005fsockets.html">select_sockets</a> should be used
instead.
</p>
<span id="XREFselect"></span><dl>
<dt id="index-select">Loadable Function: <em>[<var>n</var>, <var>ridx</var>, <var>widx</var>, <var>eidx</var>] =</em> <strong>select</strong> <em>(<var>read_fids</var>, <var>write_fids</var>, <var>except_fids</var>, <var>timeout</var>[, <var>nfds</var>])</em></dt>
<dd><p>Calls Unix <code>select</code>, see the respective manual.
</p>
<p>The following interface was chosen:
<var>read_fids</var>, <var>write_fids</var>, <var>except_fids</var>: vectors of stream-ids.
<var>timeout</var>: seconds, negative for infinite.
<var>nfds</var>: optional, default is Unix’ FD_SETSIZE (platform specific).
An error is returned if nfds or a filedescriptor belonging to a stream-id
plus one exceeds FD_SETSIZE.
Return values are:
<var>n</var>: number of ready streams.
<var>ridx</var>, <var>widx</var>, <var>eidx</var>: index vectors of ready streams in
<var>read_fids</var>, <var>write_fids</var>, and <var>except_fids</var>, respectively.
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