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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>uname</title></head><body bgcolor=white><center><font size=2>The Single UNIX ® Specification, Version 2<br>Copyright © 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_001_014_2486"> </a>NAME</h4><blockquote>uname - return system name</blockquote><h4><a name = "tag_001_014_2487"> </a>SYNOPSIS</h4><blockquote><pre><code>uname <b>[</b>snrvma<b>]</b></code></pre></blockquote><h4><a name = "tag_001_014_2488"> </a>DESCRIPTION</h4><blockquote>By default, the<i>uname</i>utility will write the operating system name to standard output.When options are specified, symbolsrepresenting one or more system characteristics will bewritten to the standard output.The format and contents of the symbols are implementation-dependent.On systems conforming to the <b>XSH</b> specification, the symbolswritten will be those supported by the <b>XSH</b> specification<i><a href="../xsh/uname.html">uname()</a></i>function.</blockquote><h4><a name = "tag_001_014_2489"> </a>OPTIONS</h4><blockquote>The<i>uname</i>utility supports the <b>XBD</b> specification, <a href="../xbd/utilconv.html#usg"><b>Utility Syntax Guidelines</b> </a> .<p>The following options are supported:<dl compact><dt><b>-a</b><dd>Behave as though all of the options<b>-mnrsv</b>were specified.<dt><b>-m</b><dd>Write the name of the hardware type on which thesystem is running to standard output.<dt><b>-n</b><dd>Write the name of this node withinan implementation-dependent communications network.<dt><b>-r</b><dd>Write the currentrelease level of the operating system implementation.<dt><b>-s</b><dd>Write the name of theimplementation of the operating system.<dt><b>-v</b><dd>Write the current versionlevel of this release of the operating system implementation.</dl><p>If no options are specified, the<i>uname</i>utility will write the operating system name, as if the<b>-s</b>option had been specified.</blockquote><h4><a name = "tag_001_014_2490"> </a>OPERANDS</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_2491"> </a>STDIN</h4><blockquote>Not used.</blockquote><h4><a name = "tag_001_014_2492"> </a>INPUT FILES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_2493"> </a>ENVIRONMENT VARIABLES</h4><blockquote>The following environment variables affect the execution of<i>uname</i>:<dl compact><dt><i>LANG</i><dd>Provide a default value for the internationalisation variablesthat are unset or null.If<i>LANG</i>is unset or null, the corresponding value from theimplementation-dependent default locale will be used.If any of the internationalisation variables contains an invalid setting, theutility will behave as if none of the variables had been defined.<dt><i>LC_ALL</i><dd>If set to a non-empty string value,override the values of all the other internationalisation variables.<dt><i>LC_CTYPE</i><dd>Determine thelocale for the interpretation of sequences of bytes of text data ascharacters (for example, single- as opposed to multi-byte charactersin arguments).<dt><i>LC_MESSAGES</i><dd>Determine the locale that should be used to affectthe format and contents of diagnosticmessages written to standard error.<dt><i>NLSPATH</i><dd>Determine the location of message cataloguesfor the processing of<i>LC_MESSAGES .</i></dl></blockquote><h4><a name = "tag_001_014_2494"> </a>ASYNCHRONOUS EVENTS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_2495"> </a>STDOUT</h4><blockquote>By default, the output will be a single line of the following form:<p><code><tt>"%s\n"</tt>, <<i>sysname</i>></code><p>If the<b>-a</b>option is specified,the output will be a single line of the following form:<p><code><pre><tt>"%s %s %s %s %s\n"</tt>, <<i>sysname</i>>,<<i>nodename</i>>,<<i>release</i>>,<<i>version</i>>,<<i>machine</i>></pre></code><p>Additional implementation-dependent symbols may be written;all such symbols will be written atthe end of the line of output before thenewline character.<p>If options are specified to selectdifferent combinations of the symbols,only those symbols will be written,in the order shown above for the<b>-a</b>option.If a symbol is not selected for writing, its corresponding trailingblank charactersalso will not be written.</blockquote><h4><a name = "tag_001_014_2496"> </a>STDERR</h4><blockquote>Used only for diagnostic messages.</blockquote><h4><a name = "tag_001_014_2497"> </a>OUTPUT FILES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_2498"> </a>EXTENDED DESCRIPTION</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_2499"> </a>EXIT STATUS</h4><blockquote>The following exit values are returned:<dl compact><dt>0<dd>The requested information was successfully written.<dt>>0<dd>An error occurred.</dl></blockquote><h4><a name = "tag_001_014_2500"> </a>CONSEQUENCES OF ERRORS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_2501"> </a>APPLICATION USAGE</h4><blockquote>Note that any of the symbols could include embeddedspace characters,which may affect parsing algorithmsif multiple options are selected for output.<p>The node name is typically a name that the system usesto identify itself for intersystem communication addressing.</blockquote><h4><a name = "tag_001_014_2502"> </a>EXAMPLES</h4><blockquote>The following command:<pre><code>uname -sr</code></pre>writes the operating system name and release level, separated by oneor moreblank characters.</blockquote><h4><a name = "tag_001_014_2503"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_2504"> </a>SEE ALSO</h4><blockquote>The <b>XSH</b> specification description of<i><a href="../xsh/uname.html">uname()</a></i>.</blockquote><hr size=2 noshade><center><font size=2>UNIX ® is a registered Trademark of The Open Group.<br>Copyright © 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>⌨️ 快捷键说明
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