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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>setpgrp</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_456"> </a>NAME</h4><blockquote>setpgrp - set process group ID</blockquote><h4><a name = "tag_000_008_457"> </a>SYNOPSIS</h4><blockquote><pre><code>#include <<a href="unistd.h.html">unistd.h</a>>pid_t setpgrp(void);</code></pre></blockquote><h4><a name = "tag_000_008_458"> </a>DESCRIPTION</h4><blockquote>If the calling process is not already a session leader,<i>setpgrp()</i>sets the process group ID of the calling process to the process ID of thecalling process. If<i>setpgrp()</i>creates a new session, then the new session has no controlling terminal.<p>The<i>setpgrp()</i>function has no effect when the calling process is a session leader.</blockquote><h4><a name = "tag_000_008_459"> </a>RETURN VALUE</h4><blockquote>Upon completion,<i>setpgrp()</i>returns the process group ID.</blockquote><h4><a name = "tag_000_008_460"> </a>ERRORS</h4><blockquote>No errors are defined.</blockquote><h4><a name = "tag_000_008_461"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_008_462"> </a>APPLICATION USAGE</h4><blockquote>None.</blockquote><h4><a name = "tag_000_008_463"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_008_464"> </a>SEE ALSO</h4><blockquote><i><a href="exec.html">exec</a></i>,<i><a href="fork.html">fork()</a></i>,<i><a href="getpid.html">getpid()</a></i>,<i><a href="getsid.html">getsid()</a></i>,<i><a href="kill.html">kill()</a></i>,<i><a href="setsid.html">setsid()</a></i>,<i><a href="unistd.h.html"><unistd.h></a></i>.</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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