📄 tcgetsid.html

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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>tcgetsid</title></head><body bgcolor=white><center><font size=2>The Single UNIX &reg; Specification, Version 2<br>Copyright &copy; 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_000_009_480">&nbsp;</a>NAME</h4><blockquote>tcgetsid - get process group ID for session leader for controlling terminal</blockquote><h4><a name = "tag_000_009_481">&nbsp;</a>SYNOPSIS</h4><blockquote><pre><code>#include &lt;<a href="termios.h.html">termios.h</a>&gt;pid_t tcgetsid(int <i>fildes</i>);</code></pre></blockquote><h4><a name = "tag_000_009_482">&nbsp;</a>DESCRIPTION</h4><blockquote>The<i>tcgetsid()</i>function obtains the process group ID of the session for which the terminalspecified by <i>fildes</i> is the controlling terminal.</blockquote><h4><a name = "tag_000_009_483">&nbsp;</a>RETURN VALUE</h4><blockquote>Upon successful completion,<i>tcgetsid()</i>returns the process group ID associated with the terminal.  Otherwise, a valueof (<b>pid_t</b>)-1 is returned and <i>errno</i> is set to indicate theerror.</blockquote><h4><a name = "tag_000_009_484">&nbsp;</a>ERRORS</h4><blockquote>The<i>tcgetsid()</i>function will fail if:<dl compact><dt>[EBADF]<dd>The <i>fildes</i> argument is not a valid file descriptor.<dt>[ENOTTY]<dd>The calling process does not have a controlling terminal,or the file is not the controlling terminal.</dl></blockquote><h4><a name = "tag_000_009_485">&nbsp;</a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_000_009_486">&nbsp;</a>APPLICATION USAGE</h4><blockquote>None.</blockquote><h4><a name = "tag_000_009_487">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_000_009_488">&nbsp;</a>SEE ALSO</h4><blockquote><i><a href="termios.h.html">&lt;termios.h&gt;</a></i>.</blockquote><hr size=2 noshade><center><font size=2>UNIX &reg; is a registered Trademark of The Open Group.<br>Copyright &copy; 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>
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