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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><sys/un.h></title></head><body bgcolor="white"><script type="text/javascript" language="JavaScript" src="../../jscript/dotcode.js"></script><basefont size="3"> <a name="<sys/un.h>"></a> <a name="tag_13_69"></a><!-- <sys/un.h> --> <!--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_13_69_01"></a>NAME</h4><blockquote>sys/un.h - definitions for UNIX domain sockets</blockquote><h4><a name="tag_13_69_02"></a>SYNOPSIS</h4><blockquote class="synopsis"><p><tt>#include <sys/un.h></tt></p></blockquote><h4><a name="tag_13_69_03"></a>DESCRIPTION</h4><blockquote><p>The <i><sys/un.h></i> header shall define the <b>sockaddr_un</b> structure that includes at least the followingmembers:</p><pre><tt>sa_family_t sun_family </tt> Address family. <tt>char sun_path[] </tt> Socket pathname. <tt></tt></pre><p>The <b>sockaddr_un</b> structure is used to store addresses for UNIX domain sockets. Values of this type shall be cast byapplications to <b>struct sockaddr</b> for use with socket functions.</p><p>The <b>sa_family_t</b> type shall be defined as described in <a href="../sys/socket.h.html#tag_13_61"><i><sys/socket.h></i></a> .</p></blockquote><hr><div class="box"><em>The following sections are informative.</em></div><h4><a name="tag_13_69_04"></a>APPLICATION USAGE</h4><blockquote><p>The size of <i>sun_path</i> has intentionally been left undefined. This is because different implementations use differentsizes. For example, 4.3 BSD uses a size of 108, and 4.4 BSD uses a size of 104. Since most implementations originate from BSDversions, the size is typically in the range 92 to 108.</p><p>Applications should not assume a particular length for <i>sun_path</i> or assume that it can hold {_POSIX_PATH_MAX} characters(255).</p></blockquote><h4><a name="tag_13_69_05"></a>RATIONALE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_13_69_06"></a>FUTURE DIRECTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_13_69_07"></a>SEE ALSO</h4><blockquote><p><a href="../sys/socket.h.html#tag_13_61"><i><sys/socket.h></i></a> , the System Interfaces volume ofIEEE Std 1003.1-2001, <a href="../../functions/bind.html"><i>bind</i>()</a>, <a href="../../functions/socket.html"><i>socket</i>()</a>, <a href="../../functions/socketpair.html"><i>socketpair</i>()</a></p></blockquote><h4><a name="tag_13_69_08"></a>CHANGE HISTORY</h4><blockquote><p>First released in Issue 6. Derived from the XNS, Issue 5.2 specification.</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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