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<a name="Group-Database-Functions-1"></a>
<h3 class="section">36.10 Group Database Functions</h3>

<p>Octave&rsquo;s group database functions return information in a structure
with the following fields.
</p>
<dl compact="compact">
<dt><code>name</code></dt>
<dd><p>The user name.
</p>
</dd>
<dt><code>passwd</code></dt>
<dd><p>The encrypted password, if available.
</p>
</dd>
<dt><code>gid</code></dt>
<dd><p>The numeric group id.
</p>
</dd>
<dt><code>mem</code></dt>
<dd><p>The members of the group.
</p></dd>
</dl>

<p>In the descriptions of the following functions, this data structure is
referred to as a <var>grp_struct</var>.
</p>
<a name="XREFgetgrent"></a><dl>
<dt><a name="index-getgrent"></a><em><var>grp_struct</var> =</em> <strong>getgrent</strong> <em>()</em></dt>
<dd><p>Return an entry from the group database, opening it if necessary.
</p>
<p>Once the end of data has been reached, <code>getgrent</code> returns 0.
</p>
<p><strong>See also:</strong> <a href="#XREFsetgrent">setgrent</a>, <a href="#XREFendgrent">endgrent</a>.
</p></dd></dl>


<a name="XREFgetgrgid"></a><dl>
<dt><a name="index-getgrgid"></a><em><var>grp_struct</var> =</em> <strong>getgrgid</strong> <em>(<var>gid</var>).</em></dt>
<dd><p>Return the first entry from the group database with the group ID
<var>gid</var>.
</p>
<p>If the group ID does not exist in the database, <code>getgrgid</code> returns 0.
</p>
<p><strong>See also:</strong> <a href="#XREFgetgrnam">getgrnam</a>.
</p></dd></dl>


<a name="XREFgetgrnam"></a><dl>
<dt><a name="index-getgrnam"></a><em><var>grp_struct</var> =</em> <strong>getgrnam</strong> <em>(<var>name</var>)</em></dt>
<dd><p>Return the first entry from the group database with the group name
<var>name</var>.
</p>
<p>If the group name does not exist in the database, <code>getgrnam</code> returns 0.
</p>
<p><strong>See also:</strong> <a href="#XREFgetgrgid">getgrgid</a>.
</p></dd></dl>


<a name="XREFsetgrent"></a><dl>
<dt><a name="index-setgrent"></a><em></em> <strong>setgrent</strong> <em>()</em></dt>
<dd><p>Return the internal pointer to the beginning of the group database.
</p>
<p><strong>See also:</strong> <a href="#XREFgetgrent">getgrent</a>, <a href="#XREFendgrent">endgrent</a>.
</p></dd></dl>


<a name="XREFendgrent"></a><dl>
<dt><a name="index-endgrent"></a><em></em> <strong>endgrent</strong> <em>()</em></dt>
<dd><p>Close the group database.
</p>
<p><strong>See also:</strong> <a href="#XREFgetgrent">getgrent</a>, <a href="#XREFsetgrent">setgrent</a>.
</p></dd></dl>





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