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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>bind</title></head><body bgcolor="white"><basefont size="3"> <a name="bind"></a> <a name="tag_03_39"></a><!-- bind --> <!--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_39_01"></a>NAME</h4><blockquote>bind - bind a name to a socket</blockquote><h4><a name="tag_03_39_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 bind(int</tt> <i>socket</i><tt>, const struct sockaddr *</tt><i>address</i><tt>,<br> socklen_t</tt> <i>address_len</i><tt>);<br></tt></code></p></blockquote><h4><a name="tag_03_39_03"></a>DESCRIPTION</h4><blockquote><p>The <i>bind</i>() function shall assign a local socket address <i>address</i> to a socket identified by descriptor <i>socket</i>that has no local socket address assigned. Sockets created with the <a href="../functions/socket.html"><i>socket</i>()</a> functionare initially unnamed; they are identified only by their address family.</p><p>The <i>bind</i>() function takes the following arguments:</p><dl compact><dt><i>socket</i></dt><dd>Specifies the file descriptor of the socket to be bound.</dd><dt><i>address</i></dt><dd>Points to a <b>sockaddr</b> structure containing the address to be bound to the socket. The length and format of the addressdepend on the address family of the socket.</dd><dt><i>address_len</i></dt><dd>Specifies the length of the <b>sockaddr</b> structure pointed to by the <i>address</i> argument.</dd></dl><p>The socket specified by <i>socket</i> may require the process to have appropriate privileges to use the <i>bind</i>()function.</p></blockquote><h4><a name="tag_03_39_04"></a>RETURN VALUE</h4><blockquote><p>Upon successful completion, <i>bind</i>() shall return 0; otherwise, -1 shall be returned and <i>errno</i> set to indicate theerror.</p></blockquote><h4><a name="tag_03_39_05"></a>ERRORS</h4><blockquote><p>The <i>bind</i>() function shall fail if:</p><dl compact><dt>[EADDRINUSE]</dt><dd>The specified address is already in use.</dd><dt>[EADDRNOTAVAIL]</dt><dd>The specified address is not available from the local machine.</dd><dt>[EAFNOSUPPORT]</dt><dd>The specified address is not a valid address for the address family of the specified socket.</dd><dt>[EBADF]</dt><dd>The <i>socket</i> argument is not a valid file descriptor.</dd><dt>[EINVAL]</dt><dd>The socket is already bound to an address, and the protocol does not support binding to a new address; or the socket has beenshut down.</dd><dt>[ENOTSOCK]</dt><dd>The <i>socket</i> argument does not refer to a socket.</dd><dt>[EOPNOTSUPP]</dt><dd>The socket type of the specified socket does not support binding to an address.</dd></dl><p>If the address family of the socket is AF_UNIX, then <i>bind</i>() shall fail if:</p><dl compact><dt>[EACCES]</dt><dd>A component of the path prefix denies search permission, or the requested name requires writing in a directory with a mode thatdenies write permission.</dd><dt>[EDESTADDRREQ] or [EISDIR]</dt><dd>The <i>address</i> argument is a null pointer.</dd><dt>[EIO]</dt><dd>An I/O error occurred.</dd><dt>[ELOOP]</dt><dd>A loop exists in symbolic links encountered during resolution of the pathname in <i>address</i>.</dd><dt>[ENAMETOOLONG]</dt><dd>A component of a pathname exceeded {NAME_MAX} characters, or an entire pathname exceeded {PATH_MAX} characters.</dd><dt>[ENOENT]</dt><dd>A component of the pathname does not name an existing file or the pathname is an empty string.</dd><dt>[ENOTDIR]</dt><dd>A component of the path prefix of the pathname in <i>address</i> is not a directory.</dd><dt>[EROFS]</dt><dd>The name would reside on a read-only file system.</dd></dl><p>The <i>bind</i>() function may fail if:</p><dl compact><dt>[EACCES]</dt><dd>The specified address is protected and the current user does not have permission to bind to it.</dd><dt>[EINVAL]</dt><dd>The <i>address_len</i> argument is not a valid length for the address family.</dd><dt>[EISCONN]</dt><dd>The socket is already connected.</dd><dt>[ELOOP]</dt><dd>More than {SYMLOOP_MAX} symbolic links were encountered during resolution of the pathname in <i>address</i>.</dd><dt>[ENAMETOOLONG]</dt><dd>Pathname resolution of a symbolic link produced an intermediate result whose length exceeds {PATH_MAX}.</dd><dt>[ENOBUFS]</dt><dd>Insufficient resources were available to complete the call.</dd></dl></blockquote><hr><div class="box"><em>The following sections are informative.</em></div><h4><a name="tag_03_39_06"></a>EXAMPLES</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_39_07"></a>APPLICATION USAGE</h4><blockquote><p>An application program can retrieve the assigned socket name with the <a href="../functions/getsockname.html"><i>getsockname</i>()</a> function.</p></blockquote><h4><a name="tag_03_39_08"></a>RATIONALE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_39_09"></a>FUTURE DIRECTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_39_10"></a>SEE ALSO</h4><blockquote><p><a href="connect.html"><i>connect</i>()</a> , <a href="getsockname.html"><i>getsockname</i>()</a> , <a href="listen.html"><i>listen</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_39_11"></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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