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<title>endprotoent_r()--Close Protocol Database</title>
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<h2>endprotoent_r()--Close Protocol Database</h2>
<div class="box" style="width: 60%;">
<br>
&nbsp;&nbsp;Syntax<br>
<pre>
#include &lt;netdb.h&gt;
int endprotoent_r(struct protoent_data
*<em>protoent_data_struct_addr</em>)
</pre>
<br>
&nbsp;&nbsp;Service Program Name: QSOSRV2<br>
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<br>
&nbsp;&nbsp;Default Public Authority: *USE<br>
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&nbsp;&nbsp;Threadsafe: Yes<br>
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<p>The <em>endprotoent_r()</em> function is used to close the protocol database
file. The file is opened by those functions that retrieve information about a
protocol (for example, <em>getprotoent_r()</em>).</p>
<h3>Parameters</h3>
<dl>
<dt>struct protoent_data *<strong>protoent_data_struct_addr</strong>
&nbsp;(input)&nbsp;</dt>
<dd>Specifies the pointer to the protoent_data structure, which is used to pass
and preserve results between function calls. The field proto_control_blk must
be initialized with hexadecimal zeros before its initial use. If compatibility
with other platforms is required, then the entire protoent_data structure must
be initialized with hexadecimal zeros before initial use.</dd>
</dl>
<br>
<h3>Authorities</h3>
<p>No authorization is required.</p>
<br>
<h3>Return Value</h3>
<p>The <em>endprotoent_r()</em> function returns an integer. Possible values
are:</p>
<ul>
<li>-1 (unsuccessful call)</li>
<li>0 (successful call)</li>
</ul>
<p>The <strong>struct protoent_data</strong> denoted by
<strong><em>protoent_data_struct_addr</em></strong> is defined in
<strong>&lt;netdb.h&gt;</strong>.</p>
<br>
<h3>Error Conditions</h3>
<p>When the <em>endprotoent_r()</em> function fails, <em>errno</em> can be set
to:</p>
<dl>
<dt><em>[EINVAL]</em></dt>
<dd><p>The protoent_data structure was not properly
initialized with hexadecimal zeros before initial use. For corrective action,
see the description for structure protoent_data.</p></dd>
</dl>
<br>
<h3>Usage Notes</h3>
<ol>
<li>When the _XOPEN_SOURCE macro defined to the value 520 or greater, the protocols
file is always closed. When the _XOPEN_SOURCE macro is not so defined, the protocols
file will not be closed if a <em>setprotoent_r()</em> call with a non-zero parameter
value was previously done.<br>
<br>
</li>
<li>The iSeries Navigator or the following CL commands can be
used to access the protocol database file:<br>
<br>
<ul>
<li>WRKPCLTBLE (Work with Protocol Table Entries)</li>
<li>ADDPCLTBLE (Add Protocol Table Entry)</li>
<li>RMVPCLTBLE (Remove Protocol Table Entry)</li>
</ul>
<br>
</li>
<li>When you develop in C-based languages and an application is compiled with the _XOPEN_SOURCE
macro defined to the value 520 or greater, the <em>endprotoent_r()</em> API is mapped to
<em>qso_endprotoent_r98()</em>.</li>
</ol>
<br>
<h3>Related Information</h3>
<ul>
<li><a href="_xopen_source.htm">_XOPEN_SOURCE</a>--Using _XOPEN_SOURCE for the UNIX 98
compatible interface<br>
<br>
</li>
<li><a href="tsgprotd.htm">getprotobynumber_r()</a>--Get Protocol<br>
<br>
</li>
<li><a href="tsgprotn.htm">getprotobyname_r()</a>--Get Protocol Information for
Protocol Name<br>
<br>
</li>
<li><a href="tsgprote.htm">getprotoent_r()</a>--Get Next Entry from Protocol
Database<br>
<br>
</li>
<li><a href="tssprote.htm">setprotoent_r()</a>--Open Protocol Database</li>
</ul>
<br>
<hr>
API introduced: V4R2
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