248 lines
6.8 KiB
HTML
248 lines
6.8 KiB
HTML
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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>qsysetregid()--Set Real and Effective Group IDs</title>
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<body>
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<h2>qsysetregid()--Set Real and Effective Group IDs</h2>
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<div class="box" style="width: 60%;">
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<br>
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Syntax<br>
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<pre>
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#include <qsysetids.h>
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int qsysetregid(gid_t rgid, gid_t egid);
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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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<!-- 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 <strong>qsysetregid()</strong> function is used to set the real and
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effective group IDs. The real and effective group IDs may be set to different
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values in the same call.</p>
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<p>A thread with *ALLOBJ special authority can set the real group ID and the
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effective group ID to any valid value.</p>
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<p>A thread without *ALLOBJ special authority can only set the real group ID to
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the saved group ID. A thread without *ALLOBJ special authority can only set the
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effective group ID to the saved group ID or the real group ID.</p>
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<p>Any supplemental group IDs remain unchanged.</p>
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<p>Job scoped locks with a lock state of *SHRRD are held on the user profiles
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associated with the real user ID, effective user ID, saved user ID, real group
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ID, effective group ID, saved group ID, and all of the supplemental groups.</p>
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<br>
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<h3>Parameters</h3>
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<dl>
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<dt><strong><em>real gid</em></strong></dt>
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<dd>(Input) Group ID.
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<p>This field must contain one of the following values:</p>
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<dl>
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<dt><strong>0</strong></dt>
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<dd>There is no real group ID.<br>
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</dd>
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<dt><strong>1 to 4294967294</strong></dt>
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<dd>The group ID value for the set operation.<br>
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</dd>
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<dt><strong>4294967295</strong></dt>
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<dd>The real group ID does not change. This value is the same as X'FFFFFFFF' or
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-1 in languages that do not support unsigned integers.</dd>
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</dl>
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<br>
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</dd>
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<dt><strong><em>effective gid</em></strong></dt>
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<dd>(Input) Group ID.
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<p>This field must contain one of the following values:</p>
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<dl>
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<dt><strong>0</strong></dt>
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<dd>There is no effective group ID.<br>
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</dd>
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<dt><strong>1 to 4294967294</strong></dt>
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<dd>The group ID value for the set operation.<br>
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</dd>
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<dt><strong>4294967295</strong></dt>
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<dd>The effective group ID does not change. This value is the same as
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X'FFFFFFFF' or -1 in languages that do not support unsigned integers.</dd>
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</dl>
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</dd>
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</dl>
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<br>
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<h3>Authorities and Locks</h3>
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<dl>
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<dt><strong>*ALLOBJ special authority</strong></dt>
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<dd>*ALLOBJ special authority is required to change the real group ID if <em>
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rgid</em> is not equal to the saved group ID. *ALLOBJ special authority is
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required to set the effective group ID if the <em>egid</em> is not equal to the
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real group ID or the saved group ID.<br>
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</dd>
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<dt><strong>User profile associated with <em>rgid</em> lock</strong></dt>
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<dd>*SHRRD<br>
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</dd>
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<dt><strong>User profile associated with <em>egid</em> lock</strong></dt>
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<dd>*SHRRD</dd>
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</dl>
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<br>
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<h3>Return Value</h3>
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<dl>
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<dt><strong>0</strong></dt>
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<dd><strong>qsysetregid()</strong> was successful.<br>
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</dd>
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<dt><strong>-1</strong></dt>
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<dd><strong>qsysetregid()</strong> was not successful. The <em>errno</em> is
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set to indicate the error.</dd>
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</dl>
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<br>
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<h3>Error Conditions</h3>
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<p>If <strong>qsysetregid()</strong> is not successful, <em>errno</em>
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indicates one of the following errors.</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#EAGAIN">EAGAIN</a>]</em></td>
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<td align="left" valign="top">
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<p>User profile associated with the rgid or rgid is locked. Try again.</p>
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</td></tr>
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<tr><td align="left" valign="top"><em>[<a href="unix14.htm#EDAMAGE">EDAMAGE</a>]</em></td>
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<td align="left" valign="top">
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<p>The user profile associated with one of the GIDs or an internal system
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object is damaged.</p>
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</td></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">
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<p>The value of the <em>gid</em> argument is not valid. Following are possible
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reasons:</p>
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<ul compact>
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<li>Out of range.</li>
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<li>Not associated with a user profile.</li>
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</ul>
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</td>
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</tr>
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<tr><td align="left" valign="top"><em>[<a href="unix14.htm#ENOTSUP">ENOTSUP</a>]</em></td>
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<td align="left" valign="top">
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<p>Operation not supported. The current effective user profile specifies
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OWNER(*GRPPRF), but the group profile associated with this <em>gid</em> is not
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equal to the user profile's first group and the user's first group is not in
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the list of supplemental groups.</p>
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</td></tr>
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<tr><td align="left" valign="top"><em>[<a href="unix14.htm#EPERM">EPERM</a>]</em></td>
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<td align="left" valign="top">
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<p>Operation not permitted. Following are possible reasons:</p>
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<ul compact>
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<li>The thread does not have *ALLOBJ special authority and a change other than
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changing the real group ID to the saved group ID, or changing the effective
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group ID to the real group ID or the saved group ID was requested.</li>
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<li>Tried to set effective group ID to 0 when there are supplemental
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groups.</li>
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</ul>
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</td></tr>
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<tr><td align="left" valign="top"><em>[<a href="unix14.htm#EUNKNOWN">EUNKNOWN</a>]</em></td>
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<td align="left" valign="top">
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<p>An unknown error has occurred. Check the joblog for error messages.</p>
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</td></tr>
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</table>
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<br>
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<hr>
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API introduced: V4R5
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<hr>
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<center>
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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> | <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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