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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>setgid</title></head><body bgcolor=white><center><font size=2>The Single UNIX ® Specification, Version 2<br>Copyright © 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_000_008_396"> </a>NAME</h4><blockquote>setgid - set-group-ID</blockquote><h4><a name = "tag_000_008_397"> </a>SYNOPSIS</h4><blockquote><pre><code>#include <<a href="systypes.h.html">sys/types.h</a>>#include <<a href="unistd.h.html">unistd.h</a>>int setgid(gid_t <i>gid</i>);</code></pre></blockquote><h4><a name = "tag_000_008_398"> </a>DESCRIPTION</h4><blockquote>If the process has appropriate privileges,<i>setgid()</i>sets the real group ID, effective group ID and the saved set-group-ID to<i>gid</i>.<p>If the process does not have appropriate privileges, but<i>gid</i>is equal to the real group ID or the saved set-group-ID,<i> setgid</i>()function sets the effective group ID to<i>gid</i>;the real group ID and saved set-group-ID remain unchanged.<p>Any supplementary group IDs of the calling process remainunchanged.</blockquote><h4><a name = "tag_000_008_399"> </a>RETURN VALUE</h4><blockquote>Upon successful completion, 0 is returned. Otherwise, -1 is returned and<i>errno</i>is set to indicate the error.</blockquote><h4><a name = "tag_000_008_400"> </a>ERRORS</h4><blockquote>The<i>setgid()</i>function will fail if:<dl compact><dt>[EINVAL]<dd>The value of the<i>gid</i>argument is invalid and is not supported by the implementation.<dt>[EPERM]<dd>The processdoes not have appropriate privileges and<i>gid</i>does not match the real group ID or the saved set-group-ID.</dl></blockquote><h4><a name = "tag_000_008_401"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_008_402"> </a>APPLICATION USAGE</h4><blockquote>None.</blockquote><h4><a name = "tag_000_008_403"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_008_404"> </a>SEE ALSO</h4><blockquote><i><a href="exec.html">exec</a></i>,<i><a href="getgid.html">getgid()</a></i>,<i><a href="setuid.html">setuid()</a></i>,<i><a href="systypes.h.html"><sys/types.h></a></i>,<i><a href="unistd.h.html"><unistd.h></a></i>.</blockquote><h4>DERIVATION</h4><blockquote>Derived from Issue 1 of the SVID.</blockquote><hr size=2 noshade><center><font size=2>UNIX ® is a registered Trademark of The Open Group.<br>Copyright © 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>⌨️ 快捷键说明
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