141 lines
4.4 KiB
HTML
141 lines
4.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 -->
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<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
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<title>grantpt</title>
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</head>
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<body bgcolor="white">
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<script type="text/javascript" language="JavaScript" src="../jscript/codes.js">
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<basefont size="3"> <a name="grantpt"></a> <a name="tag_03_262"></a><!-- grantpt -->
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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_262_01"></a>NAME</h4>
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<blockquote>grantpt - grant access to the slave pseudo-terminal device</blockquote>
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<h4><a name="tag_03_262_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/stdlib.h.html">stdlib.h</a>><br>
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<br>
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int grantpt(int</tt> <i>fildes</i><tt>); <img src="../images/opt-end.gif" alt="[Option End]" border="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_262_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <i>grantpt</i>() function shall change the mode and ownership of the slave pseudo-terminal device associated with its master
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pseudo-terminal counterpart. The <i>fildes</i> argument is a file descriptor that refers to a master pseudo-terminal device. The
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user ID of the slave shall be set to the real UID of the calling process and the group ID shall be set to an unspecified group ID.
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The permission mode of the slave pseudo-terminal shall be set to readable and writable by the owner, and writable by the group.</p>
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<p>The behavior of the <i>grantpt</i>() function is unspecified if the application has installed a signal handler to catch SIGCHLD
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signals.</p>
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</blockquote>
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<h4><a name="tag_03_262_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>Upon successful completion, <i>grantpt</i>() shall return 0; otherwise, it shall return -1 and set <i>errno</i> to indicate the
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error.</p>
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</blockquote>
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<h4><a name="tag_03_262_05"></a>ERRORS</h4>
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<blockquote>
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<p>The <i>grantpt</i>() function may fail if:</p>
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<dl compact>
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<dt>[EBADF]</dt>
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<dd>The <i>fildes</i> argument is not a valid open file descriptor.</dd>
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<dt>[EINVAL]</dt>
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<dd>The <i>fildes</i> argument is not associated with a master pseudo-terminal device.</dd>
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<dt>[EACCES]</dt>
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<dd>The corresponding slave pseudo-terminal device could not be accessed.</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_262_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_262_07"></a>APPLICATION USAGE</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_262_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_262_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_262_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="open.html"><i>open</i>()</a> , <a href="ptsname.html"><i>ptsname</i>()</a> , <a href=
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"unlockpt.html"><i>unlockpt</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href=
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"../basedefs/stdlib.h.html"><i><stdlib.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_262_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_262_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 last paragraph of the DESCRIPTION is moved from the APPLICATION USAGE section.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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<center><font size="2"><!--footer start-->
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UNIX ® is a registered Trademark of The Open Group.<br>
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POSIX ® is a registered Trademark of The IEEE.<br>
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[ <a href="../mindex.html">Main Index</a> | <a href="../basedefs/contents.html">XBD</a> | <a href=
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"../utilities/contents.html">XCU</a> | <a href="../functions/contents.html">XSH</a> | <a href="../xrat/contents.html">XRAT</a>
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