ing&nbsp;array&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;string&nbsp;array&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;unit
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;execvp&nbsp;:&nbsp;string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;string&nbsp;array&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;unit
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;wait&nbsp;:&nbsp;unit&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;*&nbsp;<span class="constructor">Unix</span>.proc