zere exit status becomes <code>Error of string</code>. <code>string</code> is perhaps less useful than <code>Exit.t</code> but it composes better. <a href="../Core/index.html"><code>Core</code></a> is included here to avoid having to open both <code>Subprocess</code> and <code>StringResults</code>.</p></header><div class="odoc-content"><div class="odoc-spec"><div class="spec value anchored" id="val-exec"><a href="#val-exec" class="anchor"></a><code><span><span class="keyword">val</span> exec : 
  <span><spa