in_channel<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;open_process_out&nbsp;:&nbsp;string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="constructor">Pervasives</span>.out_channel<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;open_process&nbsp;:&nbsp;string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="constructor">Pervasives</span>.in_channel&nbsp;*&nbsp;<span class="constructor">Pervasives</span>.out_channel<br>
&nbsp;&nbsp;<span class="keyword">val</span>