ing yet another type parameter is wise. For the time being, it's an exception.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-read_both_proc"><a href="#val-read_both_proc" class="anchor"></a><code><span><span class="keyword">val</span> read_both_proc : <span><span class="optlabel">?sleep</span>:float <span class="arrow">&#45;&gt;</span></span> <span><span><span>(<span class="type-var">'stdin</span>, <a href="#type-pipe">pipe</a>, <a href="#type-pipe">pipe</a>)</span> <a href=