109 lines
3.2 KiB
HTML
109 lines
3.2 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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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>if_nametoindex</title>
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</head>
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<body bgcolor="white">
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<basefont size="3"> <a name="if_nametoindex"></a> <a name="tag_03_273"></a><!-- if_nametoindex -->
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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_273_01"></a>NAME</h4>
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<blockquote>if_nametoindex - map a network interface name to its corresponding index</blockquote>
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<h4><a name="tag_03_273_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<p><code><tt>#include <<a href="../basedefs/net/if.h.html">net/if.h</a>><br>
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<br>
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unsigned if_nametoindex(const char *</tt><i>ifname</i><tt>);<br>
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</tt></code></p>
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</blockquote>
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<h4><a name="tag_03_273_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>The <i>if_nametoindex</i>() function shall return the interface index corresponding to name <i>ifname</i>.</p>
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</blockquote>
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<h4><a name="tag_03_273_04"></a>RETURN VALUE</h4>
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<blockquote>
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<p>The corresponding index if <i>ifname</i> is the name of an interface; otherwise, zero.</p>
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</blockquote>
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<h4><a name="tag_03_273_05"></a>ERRORS</h4>
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<blockquote>
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<p>No errors are defined.</p>
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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_273_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_273_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_273_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_273_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_273_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="getsockopt.html"><i>getsockopt</i>()</a> , <a href="if_freenameindex.html"><i>if_freenameindex</i>()</a> , <a href=
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"if_indextoname.html"><i>if_indextoname</i>()</a> , <a href="if_nameindex.html"><i>if_nameindex</i>()</a> , <a href=
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"setsockopt.html"><i>setsockopt</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href=
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"../basedefs/net/if.h.html"><i><net/if.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_273_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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</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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