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<a name="Password-Database-Functions"></a>
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Next: <a href="Group-Database-Functions.html#Group-Database-Functions" accesskey="n" rel="next">Group Database Functions</a>, Previous: <a href="Current-Working-Directory.html#Current-Working-Directory" accesskey="p" rel="prev">Current Working Directory</a>, Up: <a href="System-Utilities.html#System-Utilities" accesskey="u" rel="up">System Utilities</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Password-Database-Functions-1"></a>
<h3 class="section">36.9 Password Database Functions</h3>

<p>Octave&rsquo;s password 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>uid</code></dt>
<dd><p>The numeric user id.
</p>
</dd>
<dt><code>gid</code></dt>
<dd><p>The numeric group id.
</p>
</dd>
<dt><code>gecos</code></dt>
<dd><p>The GECOS field.
</p>
</dd>
<dt><code>dir</code></dt>
<dd><p>The home directory.
</p>
</dd>
<dt><code>shell</code></dt>
<dd><p>The initial shell.
</p></dd>
</dl>

<p>In the descriptions of the following functions, this data structure is
referred to as a <var>pw_struct</var>.
</p>
<a name="XREFgetpwent"></a><dl>
<dt><a name="index-getpwent"></a><em><var>pw_struct</var> =</em> <strong>getpwent</strong> <em>()</em></dt>
<dd><p>Return a structure containing an entry from the password database,
opening it if necessary.
</p>
<p>Once the end of the data has been reached, <code>getpwent</code> returns 0.
</p>
<p><strong>See also:</strong> <a href="#XREFsetpwent">setpwent</a>, <a href="#XREFendpwent">endpwent</a>.
</p></dd></dl>


<a name="XREFgetpwuid"></a><dl>
<dt><a name="index-getpwuid"></a><em><var>pw_struct</var> =</em> <strong>getpwuid</strong> <em>(<var>uid</var>).</em></dt>
<dd><p>Return a structure containing the first entry from the password database
with the user ID <var>uid</var>.
</p>
<p>If the user ID does not exist in the database, <code>getpwuid</code> returns 0.
</p>
<p><strong>See also:</strong> <a href="#XREFgetpwnam">getpwnam</a>.
</p></dd></dl>


<a name="XREFgetpwnam"></a><dl>
<dt><a name="index-getpwnam"></a><em><var>pw_struct</var> =</em> <strong>getpwnam</strong> <em>(<var>name</var>)</em></dt>
<dd><p>Return a structure containing the first entry from the password database
with the user name <var>name</var>.
</p>
<p>If the user name does not exist in the database, <code>getpwname</code> returns 0.
</p>
<p><strong>See also:</strong> <a href="#XREFgetpwuid">getpwuid</a>.
</p></dd></dl>


<a name="XREFsetpwent"></a><dl>
<dt><a name="index-setpwent"></a><em></em> <strong>setpwent</strong> <em>()</em></dt>
<dd><p>Return the internal pointer to the beginning of the password database.
</p>
<p><strong>See also:</strong> <a href="#XREFgetpwent">getpwent</a>, <a href="#XREFendpwent">endpwent</a>.
</p></dd></dl>


<a name="XREFendpwent"></a><dl>
<dt><a name="index-endpwent"></a><em></em> <strong>endpwent</strong> <em>()</em></dt>
<dd><p>Close the password database.
</p>
<p><strong>See also:</strong> <a href="#XREFgetpwent">getpwent</a>, <a href="#XREFsetpwent">setpwent</a>.
</p></dd></dl>





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