📄 getsockname.html
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<!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) 2001-2003 The Open Group, All Rights Reserved --><title>getsockname</title></head><body bgcolor="white"><basefont size="3"> <a name="getsockname"></a> <a name="tag_03_251"></a><!-- getsockname --> <!--header start--><center><font size="2">The Open Group Base Specifications Issue 6<br>IEEE Std 1003.1, 2003 Edition<br>Copyright © 2001-2003 The IEEE and The Open Group, All Rights reserved.</font></center><!--header end--><hr size="2" noshade><h4><a name="tag_03_251_01"></a>NAME</h4><blockquote>getsockname - get the socket name</blockquote><h4><a name="tag_03_251_02"></a>SYNOPSIS</h4><blockquote class="synopsis"><p><code><tt>#include <<a href="../basedefs/sys/socket.h.html">sys/socket.h</a>><br><br> int getsockname(int</tt> <i>socket</i><tt>, struct sockaddr *restrict</tt> <i>address</i><tt>,<br> socklen_t *restrict</tt> <i>address_len</i><tt>);<br></tt></code></p></blockquote><h4><a name="tag_03_251_03"></a>DESCRIPTION</h4><blockquote><p>The <i>getsockname</i>() function shall retrieve the locally-bound name of the specified socket, store this address in the<b>sockaddr</b> structure pointed to by the <i>address</i> argument, and store the length of this address in the object pointed toby the <i>address_len</i> argument.</p><p>If the actual length of the address is greater than the length of the supplied <b>sockaddr</b> structure, the stored addressshall be truncated.</p><p>If the socket has not been bound to a local name, the value stored in the object pointed to by <i>address</i> isunspecified.</p></blockquote><h4><a name="tag_03_251_04"></a>RETURN VALUE</h4><blockquote><p>Upon successful completion, 0 shall be returned, the <i>address</i> argument shall point to the address of the socket, and the<i>address_len</i> argument shall point to the length of the address. Otherwise, -1 shall be returned and <i>errno</i> set toindicate the error.</p></blockquote><h4><a name="tag_03_251_05"></a>ERRORS</h4><blockquote><p>The <i>getsockname</i>() function shall fail if:</p><dl compact><dt>[EBADF]</dt><dd>The <i>socket</i> argument is not a valid file descriptor.</dd><dt>[ENOTSOCK]</dt><dd>The <i>socket</i> argument does not refer to a socket.</dd><dt>[EOPNOTSUPP]</dt><dd>The operation is not supported for this socket's protocol.</dd></dl><p>The <i>getsockname</i>() function may fail if:</p><dl compact><dt>[EINVAL]</dt><dd>The socket has been shut down.</dd><dt>[ENOBUFS]</dt><dd>Insufficient resources were available in the system to complete the function.</dd></dl></blockquote><hr><div class="box"><em>The following sections are informative.</em></div><h4><a name="tag_03_251_06"></a>EXAMPLES</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_251_07"></a>APPLICATION USAGE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_251_08"></a>RATIONALE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_251_09"></a>FUTURE DIRECTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_251_10"></a>SEE ALSO</h4><blockquote><p><a href="accept.html"><i>accept</i>()</a> , <a href="bind.html"><i>bind</i>()</a> , <a href="getpeername.html"><i>getpeername</i>()</a> , <a href="socket.html"><i>socket</i>()</a> , the Base Definitions volume ofIEEE Std 1003.1-2001, <a href="../basedefs/sys/socket.h.html"><i><sys/socket.h></i></a></p></blockquote><h4><a name="tag_03_251_11"></a>CHANGE HISTORY</h4><blockquote><p>First released in Issue 6. Derived from the XNS, Issue 5.2 specification.</p><p>The <b>restrict</b> keyword is added to the <i>getsockname</i>() prototype for alignment with the ISO/IEC 9899:1999standard.</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>⌨️ 快捷键说明
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