139 lines
4.1 KiB
HTML
139 lines
4.1 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
|
|
<html>
|
|
<head>
|
|
<meta name="generator" content="HTML Tidy, see www.w3.org">
|
|
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
|
|
<link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 -->
|
|
<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
|
|
<title>unlockpt</title>
|
|
</head>
|
|
<body bgcolor="white">
|
|
<script type="text/javascript" language="JavaScript" src="../jscript/codes.js">
|
|
</script>
|
|
|
|
<basefont size="3"> <a name="unlockpt"></a> <a name="tag_03_803"></a><!-- unlockpt -->
|
|
<!--header start-->
|
|
<center><font size="2">The Open Group Base Specifications Issue 6<br>
|
|
IEEE Std 1003.1-2001<br>
|
|
Copyright © 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
|
|
|
|
<!--header end-->
|
|
<hr size="2" noshade>
|
|
<h4><a name="tag_03_803_01"></a>NAME</h4>
|
|
|
|
<blockquote>unlockpt - unlock a pseudo-terminal master/slave pair</blockquote>
|
|
|
|
<h4><a name="tag_03_803_02"></a>SYNOPSIS</h4>
|
|
|
|
<blockquote class="synopsis">
|
|
<div class="box"><code><tt><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../images/opt-start.gif" alt=
|
|
"[Option Start]" border="0"> #include <<a href="../basedefs/stdlib.h.html">stdlib.h</a>><br>
|
|
<br>
|
|
int unlockpt(int</tt> <i>fildes</i><tt>); <img src="../images/opt-end.gif" alt="[Option End]" border="0"></tt></code></div>
|
|
|
|
<tt><br>
|
|
</tt></blockquote>
|
|
|
|
<h4><a name="tag_03_803_03"></a>DESCRIPTION</h4>
|
|
|
|
<blockquote>
|
|
<p>The <i>unlockpt</i>() function shall unlock the slave pseudo-terminal device associated with the master to which <i>fildes</i>
|
|
refers.</p>
|
|
|
|
<p>Conforming applications shall ensure that they call <i>unlockpt</i>() before opening the slave side of a pseudo-terminal
|
|
device.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_803_04"></a>RETURN VALUE</h4>
|
|
|
|
<blockquote>
|
|
<p>Upon successful completion, <i>unlockpt</i>() shall return 0. Otherwise, it shall return -1 and set <i>errno</i> to indicate the
|
|
error.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_803_05"></a>ERRORS</h4>
|
|
|
|
<blockquote>
|
|
<p>The <i>unlockpt</i>() function may fail if:</p>
|
|
|
|
<dl compact>
|
|
<dt>[EBADF]</dt>
|
|
|
|
<dd>The <i>fildes</i> argument is not a file descriptor open for writing.</dd>
|
|
|
|
<dt>[EINVAL]</dt>
|
|
|
|
<dd>The <i>fildes</i> argument is not associated with a master pseudo-terminal device.</dd>
|
|
</dl>
|
|
</blockquote>
|
|
|
|
<hr>
|
|
<div class="box"><em>The following sections are informative.</em></div>
|
|
|
|
<h4><a name="tag_03_803_06"></a>EXAMPLES</h4>
|
|
|
|
<blockquote>
|
|
<p>None.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_803_07"></a>APPLICATION USAGE</h4>
|
|
|
|
<blockquote>
|
|
<p>None.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_803_08"></a>RATIONALE</h4>
|
|
|
|
<blockquote>
|
|
<p>None.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_803_09"></a>FUTURE DIRECTIONS</h4>
|
|
|
|
<blockquote>
|
|
<p>None.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_803_10"></a>SEE ALSO</h4>
|
|
|
|
<blockquote>
|
|
<p><a href="grantpt.html"><i>grantpt</i>()</a> , <a href="open.html"><i>open</i>()</a> , <a href=
|
|
"ptsname.html"><i>ptsname</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href=
|
|
"../basedefs/stdlib.h.html"><i><stdlib.h></i></a></p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_803_11"></a>CHANGE HISTORY</h4>
|
|
|
|
<blockquote>
|
|
<p>First released in Issue 4, Version 2.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_803_12"></a>Issue 5</h4>
|
|
|
|
<blockquote>
|
|
<p>Moved from X/OPEN UNIX extension to BASE.</p>
|
|
</blockquote>
|
|
|
|
<h4><a name="tag_03_803_13"></a>Issue 6</h4>
|
|
|
|
<blockquote>
|
|
<p>The DESCRIPTION is updated to avoid use of the term "must" for application requirements.</p>
|
|
</blockquote>
|
|
|
|
<div class="box"><em>End of informative text.</em></div>
|
|
|
|
<hr>
|
|
<hr size="2" noshade>
|
|
<center><font size="2"><!--footer start-->
|
|
UNIX ® is a registered Trademark of The Open Group.<br>
|
|
POSIX ® is a registered Trademark of The IEEE.<br>
|
|
[ <a href="../mindex.html">Main Index</a> | <a href="../basedefs/contents.html">XBD</a> | <a href=
|
|
"../utilities/contents.html">XCU</a> | <a href="../functions/contents.html">XSH</a> | <a href="../xrat/contents.html">XRAT</a>
|
|
]</font></center>
|
|
|
|
<!--footer end-->
|
|
<hr size="2" noshade>
|
|
</body>
|
|
</html>
|
|
|