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study/Ref-docs/POSIX/susv3/functions/getsockname.html
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study/Ref-docs/POSIX/susv3/functions/getsockname.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta name="generator" content="HTML Tidy, see www.w3.org">
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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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>getsockname</title>
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</head>
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<body bgcolor="white">
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<basefont size="3"> <a name="getsockname"></a> <a name="tag_03_251"></a><!-- getsockname -->
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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_251_01"></a>NAME</h4>
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<blockquote>getsockname - get the socket name</blockquote>
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<h4><a name="tag_03_251_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<p><code><tt>#include <<a href="../basedefs/sys/socket.h.html">sys/socket.h</a>><br>
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<br>
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int getsockname(int</tt> <i>socket</i><tt>, struct sockaddr *restrict</tt> <i>address</i><tt>,<br>
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socklen_t *restrict</tt> <i>address_len</i><tt>);<br>
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</tt></code></p>
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</blockquote>
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<h4><a name="tag_03_251_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <i>getsockname</i>() function shall retrieve the locally-bound name of the specified socket, store this address in the
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<b>sockaddr</b> structure pointed to by the <i>address</i> argument, and store the length of this address in the object pointed to
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by the <i>address_len</i> argument.</p>
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<p>If the actual length of the address is greater than the length of the supplied <b>sockaddr</b> structure, the stored address
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shall be truncated.</p>
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<p>If the socket has not been bound to a local name, the value stored in the object pointed to by <i>address</i> is
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unspecified.</p>
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</blockquote>
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<h4><a name="tag_03_251_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>Upon successful completion, 0 shall be returned, the <i>address</i> argument shall point to the address of the socket, and the
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<i>address_len</i> argument shall point to the length of the address. Otherwise, -1 shall be returned and <i>errno</i> set to
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indicate the error.</p>
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</blockquote>
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<h4><a name="tag_03_251_05"></a>ERRORS</h4>
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<blockquote>
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<p>The <i>getsockname</i>() function shall fail if:</p>
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<dl compact>
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<dt>[EBADF]</dt>
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<dd>The <i>socket</i> argument is not a valid file descriptor.</dd>
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<dt>[ENOTSOCK]</dt>
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<dd>The <i>socket</i> argument does not refer to a socket.</dd>
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<dt>[EOPNOTSUPP]</dt>
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<dd>The operation is not supported for this socket's protocol.</dd>
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</dl>
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<p>The <i>getsockname</i>() function may fail if:</p>
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<dl compact>
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<dt>[EINVAL]</dt>
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<dd>The socket has been shut down.</dd>
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<dt>[ENOBUFS]</dt>
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<dd>Insufficient resources were available in the system to complete the function.</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_251_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_251_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_251_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_251_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_251_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="accept.html"><i>accept</i>()</a> , <a href="bind.html"><i>bind</i>()</a> , <a href=
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"getpeername.html"><i>getpeername</i>()</a> , <a href="socket.html"><i>socket</i>()</a> , the Base Definitions volume of
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IEEE Std 1003.1-2001, <a href="../basedefs/sys/socket.h.html"><i><sys/socket.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_251_11"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 6. Derived from the XNS, Issue 5.2 specification.</p>
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<p>The <b>restrict</b> keyword is added to the <i>getsockname</i>() prototype for alignment with the ISO/IEC 9899:1999
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standard.</p>
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</blockquote>
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<div class="box"><em>End of informative text.</em></div>
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<hr>
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<hr size="2" noshade>
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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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]</font></center>
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<hr size="2" noshade>
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</body>
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</html>
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