161 lines
4.4 KiB
HTML
161 lines
4.4 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
|
<html>
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
|
<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
|
|
<title>sethostent()--Open Host Database</title>
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
|
<!-- US Government Users Restricted Rights -->
|
|
<!-- Use, duplication or disclosure restricted by -->
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
|
<!-- Begin Header Records ========================================== -->
|
|
<!-- Unix8 SCRIPT J converted by B2H R4.1 (346) (CMS) by V2KEA304 -->
|
|
<!-- at RCHVMW2 on 17 Feb 1999 at 11:05:09 -->
|
|
<!--End Header Records -->
|
|
<!-- Edited by Kersten Feb 02 -->
|
|
<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
|
|
</head>
|
|
<body>
|
|
<a name="Top_Of_Page"></a>
|
|
<!-- Java sync-link -->
|
|
<script type="text/javascript" language="Javascript" src="../rzahg/synch.js">
|
|
</script>
|
|
|
|
<h2>sethostent()--Open Host Database</h2>
|
|
|
|
<div class="box" style="width: 60%;">
|
|
<br>
|
|
Syntax<br>
|
|
<pre>
|
|
#include <netdb.h>
|
|
|
|
void sethostent(int <em>stay_open</em>)
|
|
</pre>
|
|
|
|
<br>
|
|
Service Program Name: QSOSRV2<br>
|
|
<!-- iddvc RMBR -->
|
|
<br>
|
|
Default Public Authority: *USE<br>
|
|
<!-- iddvc RMBR -->
|
|
<br>
|
|
Threadsafe: No; see <a href="#USAGE_NOTES">Usage Notes</a>.<br>
|
|
<!-- iddvc RMBR -->
|
|
<br>
|
|
</div>
|
|
|
|
<p>The <em>sethostent()</em> function is used to prepare for sequential access
|
|
to the host database file. <em>sethostent()</em> opens the file and repositions
|
|
the file marker to the beginning of the file. In addition,
|
|
<em>sethostent()</em> affects what type of transport service (connectionless
|
|
versus connection-oriented) is to be used when <em>gethostbyname()</em> and
|
|
<em>gethostbyaddr()</em> need to retrieve host information from the domain name
|
|
server.</p>
|
|
|
|
<br>
|
|
<h3>Parameters</h3>
|
|
|
|
<dl>
|
|
<dt>int <strong>stay_open</strong></dt>
|
|
|
|
<dd>(Input) Specifies whether to leave the database file open after each call
|
|
to <em>gethostbyname()</em> and <em>gethostbyaddr()</em>. A nonzero value
|
|
results in the database file being left open. Also, a nonzero value results in
|
|
the use of a connection-oriented transport service (for example, TCP) being
|
|
used by <em>gethostbyname()</em> and <em>gethostbyaddr()</em> when host
|
|
information is to be obtained from the domain name server.</dd>
|
|
</dl>
|
|
|
|
<br>
|
|
<h3>Authorities</h3>
|
|
|
|
<p>No authorization is required.</p>
|
|
|
|
<br>
|
|
<h3>Error Conditions</h3>
|
|
<p>When <em>sethostent()</em> fails, <em>h_errno</em> (defined in
|
|
<strong><netdb.h></strong>) can be set to one of the following:</p>
|
|
<dl>
|
|
|
|
<dt><em><samp>NO_RECOVERY</samp></em></dt>
|
|
<dd><p>An unrecoverable error has occurred.</p></dd>
|
|
|
|
</dl>
|
|
<br>
|
|
|
|
<h3><a name="USAGE_NOTES">Usage Notes</a></h3>
|
|
|
|
<ol>
|
|
<li>The iSeries Navigator or the following CL commands can be
|
|
used to access the host database file: <br><br>
|
|
|
|
<ul>
|
|
<li>ADDTCPHTE (Add TCP/IP Host Table Entry</li>
|
|
|
|
<li>RMVTCPHTE (Remove TCP/IP Host Table Entry)</li>
|
|
|
|
<li>CHGTCPHTE (Change TCP/IP Host Table Entry)</li>
|
|
|
|
<li>RNMTCPHTE (Rename TCP/IP Host Table Entry)</li>
|
|
|
|
<li>MRGTCPHT (Merge TCP/IP Host Tables)</li>
|
|
</ul>
|
|
|
|
<br>
|
|
</li>
|
|
|
|
<li>Do not use the <em>sethostent()</em> function in a multithreaded
|
|
environment. See the multithread alternative <em>sethostent_r()</em>
|
|
function.<br>
|
|
<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>sethostent()</em>
|
|
API is mapped to<em>qso_sethostent98()</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="ghosta.htm">gethostbyaddr()</a>--Get Host Information for IP
|
|
Address<br>
|
|
<br>
|
|
</li>
|
|
|
|
<li><a href="ghostnm.htm">gethostbyname()</a>--Get Host Information for Host
|
|
Name<br>
|
|
<br>
|
|
</li>
|
|
|
|
<li><a href="ehostnt.htm">endhostent()</a>--Close Host Database<br>
|
|
<br>
|
|
</li>
|
|
|
|
<li><a href="ghostnt.htm">gethostent()</a>--Get Next Entry from Host
|
|
Database</li>
|
|
</ul>
|
|
|
|
<br>
|
|
<hr>
|
|
API introduced: V3R1
|
|
|
|
<hr>
|
|
<center>
|
|
<table cellpadding="2" cellspacing="2">
|
|
<tr align="center">
|
|
<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> | <a href=
|
|
"unix.htm">UNIX-Type APIs</a> | <a href="aplist.htm">APIs by category</a> </td>
|
|
</tr>
|
|
</table>
|
|
</center>
|
|
</body>
|
|
</html>
|
|
|