190 lines
4.5 KiB
HTML
190 lines
4.5 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
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<title>sethostid()--Set Host ID</title>
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<!-- Begin Header Records ========================================== -->
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<!-- Unix8 SCRIPT J converted by B2H R4.1 (346) (CMS) by V2KEA304 -->
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<!-- at RCHVMW2 on 17 Feb 1999 at 11:05:09 -->
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<!--End Header Records -->
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<!-- Edited by Kersten Feb 02 -->
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<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</head>
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<body>
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<a name="Top_Of_Page"></a>
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<!-- Java sync-link -->
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<script type="text/javascript" language="Javascript" src="../rzahg/synch.js">
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</script>
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<h2>sethostid()--Set Host ID</h2>
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<div class="box" style="width: 50%;">
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<br>
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Syntax<br>
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<pre>
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#include <sys/types.h>
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#include <sys/socket.h>
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int sethostid(int <em>host_id</em>)
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</pre>
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<br>
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Service Program Name: QSOSRV1<br>
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<!-- iddvc RMBR -->
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<br>
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Default Public Authority: *USE<br>
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<!-- iddvc RMBR -->
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<br>
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Threadsafe: Yes<br>
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<!-- iddvc RMBR -->
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<br>
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</div>
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<p>The <em>sethostid()</em> function is used to set a host ID.</p>
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<br>
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<h3>Parameters</h3>
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<dl>
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<dt><strong>host_id</strong></dt>
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<dd>(Input) The 32-bit <em>host_id</em></dd>
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</dl>
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<br>
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<h3>Authorities</h3>
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<p>No authorization is required.</p>
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<br>
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<h3>Return Value</h3>
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<p><em>sethostid()</em> returns an integer. Possible values are:</p>
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<ul>
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<li>-1 (unsuccessful)<br>
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<br>
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</li>
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<li>0 (successful)</li>
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</ul>
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<br>
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<h3>Error Conditions</h3>
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<p>When <em>sethostid()</em> fails, <em>errno</em> can be set to one of the
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following:</p>
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<table cellpadding="5">
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<!-- cols="15 85" -->
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<tr>
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<td align="left" valign="top"><em>[EIO]</em></td>
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<td align="left" valign="top">Input/output error.<br>
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<br>
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</td>
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</tr>
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<tr>
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<td align="left" valign="top"><em>[EPERM]</em></td>
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<td align="left" valign="top">Operation not permitted.
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<p>The process does not have the appropriate privileges to use
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<em>sethostid()</em>.</p>
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</td>
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</tr>
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<tr>
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<td align="left" valign="top"><em>[EUNKNOWN]</em></td>
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<td align="left" valign="top">Unknown system state.</td>
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</tr>
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</table>
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<br>
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<br>
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<h3>Error Messages</h3>
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<table width="100%" cellpadding="5">
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<!-- cols="15 85" -->
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<tr>
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<th align="left" valign="top">Message ID</th>
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<th align="left" valign="top">Error Message Text</th>
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</tr>
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<tr>
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<td width="15%" valign="top">CPE3418 E</td>
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<td width="85%" valign="top">Possible APAR condition or hardware failure.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF9872 E</td>
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<td align="left" valign="top">Program or service program &1 in library
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&2 ended. Reason code &3.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA081 E</td>
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<td align="left" valign="top">Unable to set return value or error code.</td>
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</tr>
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</table>
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<br>
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<br>
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<h3>Usage Notes</h3>
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<ol>
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<li>A process must have the <samp>*iosyscfg</samp> special authority to use the
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<em>sethostid()</em>.<br>
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<br>
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</li>
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<li>When a process issues a <em>sethostid()</em>, the <em>host_id</em> can be
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accessed by ANY process that issues a <em>gethostid()</em>.<br>
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<br>
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</li>
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<li>While many socket implementations refer to the <em>host_id</em> as the IP
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address of the machine, this is not necessarily the case. Many machines that
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support the TCP/IP protocol suite support multiple local IP addresses. The
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value contained in <em>host_id</em> is <strong>not</strong> used by TCP in any
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manner.<br>
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<br>
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</li>
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<li>The <em>host_id</em> is reset to zero when an initial program load is
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performed.<br>
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<br>
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</li>
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<li>The <em>host_id</em> is a signed integer. Therefore, a user should be
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careful to not confuse a return value of -1 from a <em>gethostid()</em> with an
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error return value. <em>gethostid()</em> never returns an error.</li>
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</ol>
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<br>
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<h3>Related Information</h3>
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<p><a href="ghosti.htm">gethostid()</a>--Retrieve Host ID Address</p>
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<br>
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<hr>
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API introduced: V3R1
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<hr>
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|
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<center>
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|
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<table cellpadding="2" cellspacing="2">
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<tr align="center">
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<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> |
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<a href="unix.htm">UNIX-Type APIs</a> |
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<a href="aplist.htm">APIs by category</a> </td>
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</tr>
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</table>
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</center>
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</body>
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</html>
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