115 lines
3.7 KiB
HTML
115 lines
3.7 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
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<title>h_errno</title>
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</head>
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<body bgcolor="white">
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<script type="text/javascript" language="JavaScript" src="../jscript/codes.js">
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</script>
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<basefont size="3"> <a name="h_errno"></a> <a name="tag_03_263"></a><!-- h_errno -->
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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_263_01"></a>NAME</h4>
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<blockquote>h_errno - error return value for network database operations</blockquote>
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<h4><a name="tag_03_263_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<div class="box"><code><tt><sup>[<a href="javascript:open_code('OB')">OB</a>]</sup> <img src="../images/opt-start.gif" alt=
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"[Option Start]" border="0"> #include <netdb.h> <img src="../images/opt-end.gif" alt="[Option End]" border="0"></tt></code></div>
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</blockquote>
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<h4><a name="tag_03_263_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>This method of returning errors is used only in connection with obsolescent functions.</p>
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<p>The <a href="../basedefs/netdb.h.html"><i><netdb.h></i></a> header provides a declaration of <i>h_errno</i> as a
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modifiable lvalue of type <b>int</b>.</p>
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<p>It is unspecified whether <i>h_errno</i> is a macro or an identifier declared with external linkage. If a macro definition is
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suppressed in order to access an actual object, or a program defines an identifier with the name <i>h_errno</i>, the behavior is
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undefined.</p>
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</blockquote>
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<h4><a name="tag_03_263_04"></a>RETURN VALUE</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_263_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_263_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_263_07"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>Applications should obtain the definition of <i>h_errno</i> by the inclusion of the <a href=
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"../basedefs/netdb.h.html"><i><netdb.h></i></a> header.</p>
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</blockquote>
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<h4><a name="tag_03_263_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_263_09"></a>FUTURE DIRECTIONS</h4>
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<blockquote>
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<p><i>h_errno</i> may be withdrawn in a future version.</p>
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</blockquote>
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<h4><a name="tag_03_263_10"></a>SEE ALSO</h4>
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<blockquote>
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<p><a href="endhostent.html"><i>endhostent</i>()</a> , <a href="errno.html"><i>errno</i>()</a> , the Base Definitions volume of
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IEEE Std 1003.1-2001, <a href="../basedefs/netdb.h.html"><i><netdb.h></i></a></p>
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</blockquote>
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<h4><a name="tag_03_263_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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<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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