ALSE</code>, if <code>TRUE</code>, add "2&gt;&amp;1" to
the command string and set <code>intern</code> to <code>TRUE</code>; only used in
legacy mode.</p></dd>


<dt id="arg-legacyexec">legacyExec<a class="anchor" aria-label="anchor" href="#arg-legacyexec"></a></dt>
<dd><p>default NULL, taking the logical value set by
<code>set.legacyExecOption</code> which is initialised to <code>FALSE</code> on
"unix" platforms and <code>TRUE</code> otherwise. If <code>TRUE</code>, use
<code>system</code>, if <code>FALSE<