ocess, separated by newline characters. If you want to read from stdout while writing, use <a href="#val-fold_with"><code>fold_with</code></a>.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-read"><a href="#val-read" class="anchor"></a><code><span><span class="keyword">val</span> read : 
  <span><span><span>(<span class="type-var">'stdin</span>, <a href="../Core/index.html#type-stdout">Core.stdout</a>, <span class="type-var">'stderr</span>)</span> <a href="../Core/Cmd/index.h