nt&nbsp;array&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;unit<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;initgroups&nbsp;:&nbsp;string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;unit<br>
&nbsp;&nbsp;<span class="keyword">type</span>&nbsp;passwd_entry&nbsp;=<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="constructor">Unix</span>.passwd_entry&nbsp;=&nbsp;{<br>
&nbsp;&nbsp;&nbsp;&nbsp;pw_name&nbsp;:&nbsp;string;<br>
&nbsp;&nbsp;&nbsp;&nbsp;p