161 lines
5.3 KiB
HTML
161 lines
5.3 KiB
HTML
<!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>qsygetgroups()--Get Supplemental Group IDs</title>
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<!-- Begin Header Records ========================================== -->
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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</head>
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<body>
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<script type="text/javascript" language="Javascript" src="../rzahg/synch.js">
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</script>
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<h2>qsygetgroups()--Get Supplemental Group IDs</h2>
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<!-- =========================================== -->
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<!-- S Y N T A X / P A R M T A B L E -->
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<!-- =========================================== -->
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<div class="box" style="width: 80%;">
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<br>
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Syntax<br>
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<pre>
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#include <qsysetid.h>
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int qsygetgroups(int <em>gidsetsize</em>, gid_t <em>grouplist</em>[])
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</pre>
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Service Program Name: QSYSETIDS<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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<br>
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Threadsafe: No<br>
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<!-- iddvc RMBR -->
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<br>
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</div>
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<!-- =========================================== -->
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<!-- D E F I N I T I O N -->
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<!-- =========================================== -->
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<p>If the <em>gidsetsize</em> argument is zero, <strong>qsygetgroups()</strong>
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returns the number of supplemental group IDs associated with the calling thread
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without modifying the array pointed to by the <em>grouplist</em> argument.
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Otherwise, <strong>qsygetgroups()</strong> fills in the array <em>
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grouplist</em> with the supplementary group IDs of the calling thread and
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returns the actual number of group IDs stored. The values of array entries with
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indexes larger than or equal to the returned value are undefined.</p>
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<!-- =========================================== -->
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<!-- P A R A M E T E R S -->
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<!-- =========================================== -->
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<h3>Parameters</h3>
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<dl>
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<dt><strong><em>gidsetsize</em></strong></dt>
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<dd>(Input) The number of elements in the supplied array <em>
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grouplist</em>.<br>
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<br>
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</dd>
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<dt><strong><em>grouplist</em></strong></dt>
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<dd>(Output) The supplementary group IDs.</dd>
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</dl>
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<br>
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<!-- =========================================== -->
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<!-- A U T H O R I T I E S A N D L O C K S -->
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<!-- =========================================== -->
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<h3>Authorities</h3>
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<p>No authorization is required.</p>
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<!-- =========================================== -->
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<!-- R E T U R N V A L U E -->
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<!-- =========================================== --><br>
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<h3>Return Value</h3>
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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" nowrap><em>0 or > 0</em></td>
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<td align="left" valign="top"><strong>qsygetgroups()</strong> was successful.
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If the <em>gidsetsize</em> argument is 0, the number of supplementary group IDs
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is returned. If <em>gidsetsize</em> is greater than 0, the array <em>
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grouplist</em> is filled with the supplementary group IDs of the calling thread
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and the return value represents the actual number of group IDs stored.</td>
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</tr>
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<tr>
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<td align="left" valign="top"><em>-1</em></td>
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<td align="left" valign="top"><strong>qsygetgroups()</strong> was not
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successful. The <em>errno</em> global variable is set to indicate the
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error.</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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<!-- =========================================== -->
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<!-- E R R O R C O N D I T I O N S -->
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<!-- =========================================== -->
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<h3>Error Conditions</h3>
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<p>If <strong>qsygetgroups()</strong> is not successful, <em>errno</em> usually
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indicates one of the following errors. Under some conditions, <em>errno</em>
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could indicate an error other than those listed here.</p>
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<table cellpadding="5">
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<!-- cols="25 75" -->
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<tr>
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<th align="left" valign="bottom">Error condition</th>
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<th align="left" valign="bottom">Additional information</th>
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</tr>
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<tr>
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<td align="left" valign="top">
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<em>[<a href="unix14.htm#EINVAL">EINVAL</a>]</em></td>
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<td align="left" valign="top">The <em>gidsetsize</em> argument is not equal to zero and is less than the
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number of group IDs.</td></tr>
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</table>
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<br>
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<!-- =========================================== -->
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<!-- -->
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<!-- =========================================== --><br>
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<hr>
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API introduced: V5R2
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<hr>
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<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> | <a href=
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"unix.htm">UNIX-Type APIs</a> | <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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