150 lines
5.3 KiB
HTML
150 lines
5.3 KiB
HTML
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<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
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<title>setregid</title>
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<basefont size="3"> <a name="setregid"></a> <a name="tag_03_663"></a><!-- setregid -->
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<!--header start-->
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<center><font size="2">The Open Group Base Specifications Issue 6<br>
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IEEE Std 1003.1-2001<br>
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Copyright © 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
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<!--header end-->
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<hr size="2" noshade>
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<h4><a name="tag_03_663_01"></a>NAME</h4>
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<blockquote>setregid - set real and effective group IDs</blockquote>
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<h4><a name="tag_03_663_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<div class="box"><code><tt><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../images/opt-start.gif" alt=
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"[Option Start]" border="0"> #include <<a href="../basedefs/unistd.h.html">unistd.h</a>><br>
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<br>
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int setregid(gid_t</tt> <i>rgid</i><tt>, gid_t</tt> <i>egid</i><tt>); <img src="../images/opt-end.gif" alt="[Option End]" border=
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"0"></tt></code></div>
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<tt><br>
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</tt></blockquote>
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<h4><a name="tag_03_663_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <i>setregid</i>() function shall set the real and effective group IDs of the calling process.</p>
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<p>If <i>rgid</i> is -1, the real group ID shall not be changed; if <i>egid</i> is -1, the effective group ID shall not be
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changed.</p>
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<p>The real and effective group IDs may be set to different values in the same call.</p>
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<p>Only a process with appropriate privileges can set the real group ID and the effective group ID to any valid value.</p>
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<p>A non-privileged process can set either the real group ID to the saved set-group-ID from one of the <i><a href=
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"../functions/exec.html">exec</a></i> family of functions, or the effective group ID to the saved set-group-ID or the real group
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ID.</p>
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<p>Any supplementary group IDs of the calling process remain unchanged.</p>
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</blockquote>
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<h4><a name="tag_03_663_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>Upon successful completion, 0 shall be returned. Otherwise, -1 shall be returned and <i>errno</i> set to indicate the error, and
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neither of the group IDs are changed.</p>
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</blockquote>
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<h4><a name="tag_03_663_05"></a>ERRORS</h4>
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<blockquote>
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<p>The <i>setregid</i>() function shall fail if:</p>
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<dl compact>
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<dt>[EINVAL]</dt>
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<dd>The value of the <i>rgid</i> or <i>egid</i> argument is invalid or out-of-range.</dd>
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<dt>[EPERM]</dt>
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<dd>The process does not have appropriate privileges and a change other than changing the real group ID to the saved set-group-ID,
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or changing the effective group ID to the real group ID or the saved set-group-ID, was requested.</dd>
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</dl>
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</blockquote>
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<hr>
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<div class="box"><em>The following sections are informative.</em></div>
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<h4><a name="tag_03_663_06"></a>EXAMPLES</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_663_07"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>If a set-group-ID process sets its effective group ID to its real group ID, it can still set its effective group ID back to the
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saved set-group-ID.</p>
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</blockquote>
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<h4><a name="tag_03_663_08"></a>RATIONALE</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_663_09"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p>None.</p>
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</blockquote>
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<h4><a name="tag_03_663_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="exec.html"><i><a href="../functions/exec.html">exec</a></i>()</a> , <a href="getegid.html"><i>getegid</i>()</a> , <a
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href="geteuid.html"><i>geteuid</i>()</a> , <a href="getgid.html"><i>getgid</i>()</a> , <a href="getuid.html"><i>getuid</i>()</a> ,
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<a href="setegid.html"><i>setegid</i>()</a> , <a href="seteuid.html"><i>seteuid</i>()</a> , <a href=
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"setgid.html"><i>setgid</i>()</a> , <a href="setreuid.html"><i>setreuid</i>()</a> , <a href="setuid.html"><i>setuid</i>()</a> , the
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Base Definitions volume of IEEE Std 1003.1-2001, <a href="../basedefs/unistd.h.html"><i><unistd.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_663_11"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 4, Version 2.</p>
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</blockquote>
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<h4><a name="tag_03_663_12"></a>Issue 5</h4>
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<blockquote>
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<p>Moved from X/OPEN UNIX extension to BASE.</p>
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<p>The DESCRIPTION is updated to indicate that the saved set-group-ID can be set by any of the <i><a href=
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"../functions/exec.html">exec</a></i> family of functions, not just <a href="../functions/execve.html"><i>execve</i>()</a>.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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