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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>gethostname</title></head><body bgcolor="white"><basefont size="3"> <a name="gethostname"></a> <a name="tag_03_228"></a><!-- gethostname --> <!--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_228_01"></a>NAME</h4><blockquote>gethostname - get name of current host</blockquote><h4><a name="tag_03_228_02"></a>SYNOPSIS</h4><blockquote class="synopsis"><p><code><tt>#include <<a href="../basedefs/unistd.h.html">unistd.h</a>><br><br> int gethostname(char *</tt><i>name</i><tt>, size_t</tt> <i>namelen</i><tt>);<br></tt></code></p></blockquote><h4><a name="tag_03_228_03"></a>DESCRIPTION</h4><blockquote><p>The <i>gethostname</i>() function shall return the standard host name for the current machine. The <i>namelen</i> argument shallspecify the size of the array pointed to by the <i>name</i> argument. The returned name shall be null-terminated, except that if<i>namelen</i> is an insufficient length to hold the host name, then the returned name shall be truncated and it is unspecifiedwhether the returned name is null-terminated.</p><p>Host names are limited to {HOST_NAME_MAX} bytes.</p></blockquote><h4><a name="tag_03_228_04"></a>RETURN VALUE</h4><blockquote><p>Upon successful completion, 0 shall be returned; otherwise, -1 shall be returned.</p></blockquote><h4><a name="tag_03_228_05"></a>ERRORS</h4><blockquote><p>No errors are defined.</p></blockquote><hr><div class="box"><em>The following sections are informative.</em></div><h4><a name="tag_03_228_06"></a>EXAMPLES</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_228_07"></a>APPLICATION USAGE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_228_08"></a>RATIONALE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_228_09"></a>FUTURE DIRECTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_228_10"></a>SEE ALSO</h4><blockquote><p><a href="gethostid.html"><i>gethostid</i>()</a> , <a href="uname.html"><i>uname</i>()</a> , the Base Definitions volume ofIEEE Std 1003.1-2001, <a href="../basedefs/unistd.h.html"><i><unistd.h></i></a></p></blockquote><h4><a name="tag_03_228_11"></a>CHANGE HISTORY</h4><blockquote><p>First released in Issue 6. Derived from the XNS, Issue 5.2 specification.</p><p>The Open Group Base Resolution bwg2001-008 is applied, changing the <i>namelen</i> parameter from <b>socklen_t</b> to<b>size_t</b>.</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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