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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>uname</title></head><body bgcolor="white"><script type="text/javascript" language="JavaScript" src="../jscript/codes.js"></script><basefont size="3"> <a name="uname"></a> <a name="tag_04_154"></a><!-- uname --> <!--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_04_154_01"></a>NAME</h4><blockquote>uname - return system name</blockquote><h4><a name="tag_04_154_02"></a>SYNOPSIS</h4><blockquote class="synopsis"><p><code><tt>uname</tt> <b>[</b><tt>-snrvma</tt><b>]</b></code></p></blockquote><h4><a name="tag_04_154_03"></a>DESCRIPTION</h4><blockquote><p>By default, the <i>uname</i> utility shall write the operating system name to standard output. When options are specified,symbols representing one or more system characteristics shall be written to the standard output. The format and contents of thesymbols are implementation-defined. On systems conforming to the System Interfaces volume of IEEE Std 1003.1-2001, thesymbols written shall be those supported by the <a href="../functions/uname.html"><i>uname</i>()</a> function as defined in theSystem Interfaces volume of IEEE Std 1003.1-2001.</p></blockquote><h4><a name="tag_04_154_04"></a>OPTIONS</h4><blockquote><p>The <i>uname</i> utility shall conform to the Base Definitions volume of IEEE Std 1003.1-2001, <a href="../basedefs/xbd_chap12.html#tag_12_02">Section 12.2, Utility Syntax Guidelines</a>.</p><p>The following options shall be supported:</p><dl compact><dt><b>-a</b></dt><dd>Behave as though all of the options <b>-mnrsv</b> were specified.</dd><dt><b>-m</b></dt><dd>Write the name of the hardware type on which the system is running to standard output.</dd><dt><b>-n</b></dt><dd>Write the name of this node within an implementation-defined communications network.</dd><dt><b>-r</b></dt><dd>Write the current release level of the operating system implementation.</dd><dt><b>-s</b></dt><dd>Write the name of the implementation of the operating system.</dd><dt><b>-v</b></dt><dd>Write the current version level of this release of the operating system implementation.</dd></dl><p>If no options are specified, the <i>uname</i> utility shall write the operating system name, as if the <b>-s</b> option had beenspecified.</p></blockquote><h4><a name="tag_04_154_05"></a>OPERANDS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_04_154_06"></a>STDIN</h4><blockquote><p>Not used.</p></blockquote><h4><a name="tag_04_154_07"></a>INPUT FILES</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_04_154_08"></a>ENVIRONMENT VARIABLES</h4><blockquote><p>The following environment variables shall affect the execution of <i>uname</i>:</p><dl compact><dt><i>LANG</i></dt><dd>Provide a default value for the internationalization variables that are unset or null. (See the Base Definitions volume ofIEEE Std 1003.1-2001, <a href="../basedefs/xbd_chap08.html#tag_08_02">Section 8.2, Internationalization Variables</a> forthe precedence of internationalization variables used to determine the values of locale categories.)</dd><dt><i>LC_ALL</i></dt><dd>If set to a non-empty string value, override the values of all the other internationalization variables.</dd><dt><i>LC_CTYPE</i></dt><dd>Determine the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte asopposed to multi-byte characters in arguments).</dd><dt><i>LC_MESSAGES</i></dt><dd>Determine the locale that should be used to affect the format and contents of diagnostic messages written to standarderror.</dd><dt><i>NLSPATH</i></dt><dd><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]" border="0">Determine the location of message catalogs for the processing of <i>LC_MESSAGES .</i> <img src="../images/opt-end.gif" alt="[Option End]" border="0"></dd></dl></blockquote><h4><a name="tag_04_154_09"></a>ASYNCHRONOUS EVENTS</h4><blockquote><p>Default.</p></blockquote><h4><a name="tag_04_154_10"></a>STDOUT</h4><blockquote><p>By default, the output shall be a single line of the following form:</p><pre><tt>"%s\n", <</tt><i>sysname</i><tt>></tt></pre><p>If the <b>-a</b> option is specified, the output shall be a single line of the following form:</p><pre><tt>"%s %s %s %s %s\n", <</tt><i>sysname</i><tt>>, <</tt><i>nodename</i><tt>>, <</tt><i>release</i><tt>>, <</tt><i>version</i><tt>>, <</tt><i>machine</i><tt>></tt></pre><p>Additional implementation-defined symbols may be written; all such symbols shall be written at the end of the line of outputbefore the <newline>.</p><p>If options are specified to select different combinations of the symbols, only those symbols shall be written, in the ordershown above for the <b>-a</b> option. If a symbol is not selected for writing, its corresponding trailing <blank>s also shallnot be written.</p></blockquote><h4><a name="tag_04_154_11"></a>STDERR</h4><blockquote><p>The standard error shall be used only for diagnostic messages.</p></blockquote><h4><a name="tag_04_154_12"></a>OUTPUT FILES</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_04_154_13"></a>EXTENDED DESCRIPTION</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_04_154_14"></a>EXIT STATUS</h4><blockquote><p>The following exit values shall be returned:</p><dl compact><dt> 0</dt><dd>The requested information was successfully written.</dd><dt>>0</dt><dd>An error occurred.</dd></dl></blockquote><h4><a name="tag_04_154_15"></a>CONSEQUENCES OF ERRORS</h4><blockquote><p>Default.</p></blockquote><hr><div class="box"><em>The following sections are informative.</em></div><h4><a name="tag_04_154_16"></a>APPLICATION USAGE</h4><blockquote><p>Note that any of the symbols could include embedded <space>s, which may affect parsing algorithms if multiple options areselected for output.</p><p>The node name is typically a name that the system uses to identify itself for inter-system communication addressing.</p></blockquote><h4><a name="tag_04_154_17"></a>EXAMPLES</h4><blockquote><p>The following command:</p><pre><tt>uname -sr</tt></pre><p>writes the operating system name and release level, separated by one or more <blank>s.</p></blockquote><h4><a name="tag_04_154_18"></a>RATIONALE</h4><blockquote><p>It was suggested that this utility cannot be used portably since the format of the symbols is implementation-defined. ThePOSIX.1 working group could not achieve consensus on defining these formats in the underlying <a href="../functions/uname.html"><i>uname</i>()</a> function, and there was no expectation that this volume ofIEEE Std 1003.1-2001 would be any more successful. Some applications may still find this historical utility of value. Forexample, the symbols could be used for system log entries or for comparison with operator or user input.</p></blockquote><h4><a name="tag_04_154_19"></a>FUTURE DIRECTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_04_154_20"></a>SEE ALSO</h4><blockquote><p>The System Interfaces volume of IEEE Std 1003.1-2001, <a href="../functions/uname.html"><i>uname</i>()</a></p></blockquote><h4><a name="tag_04_154_21"></a>CHANGE HISTORY</h4><blockquote><p>First released in Issue 2.</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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