273 lines
8.4 KiB
HTML
273 lines
8.4 KiB
HTML
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<!-- Copyright (c) 2001 The Open Group, All Rights Reserved -->
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<title>uname</title>
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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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<basefont size="3"> <a name="uname"></a> <a name="tag_04_154"></a><!-- uname -->
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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_04_154_01"></a>NAME</h4>
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<blockquote>uname - return system name</blockquote>
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<h4><a name="tag_04_154_02"></a>SYNOPSIS</h4>
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<blockquote class="synopsis">
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<p><code><tt>uname</tt> <b>[</b><tt>-snrvma</tt><b>]</b></code></p>
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</blockquote>
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<h4><a name="tag_04_154_03"></a>DESCRIPTION</h4>
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<blockquote>
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<p>By default, the <i>uname</i> utility shall write the operating system name to standard output. When options are specified,
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symbols representing one or more system characteristics shall be written to the standard output. The format and contents of the
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symbols are implementation-defined. On systems conforming to the System Interfaces volume of IEEE Std 1003.1-2001, the
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symbols written shall be those supported by the <a href="../functions/uname.html"><i>uname</i>()</a> function as defined in the
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System Interfaces volume of IEEE Std 1003.1-2001.</p>
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</blockquote>
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<h4><a name="tag_04_154_04"></a>OPTIONS</h4>
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<blockquote>
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<p>The <i>uname</i> utility shall conform to the Base Definitions volume of IEEE Std 1003.1-2001, <a href=
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"../basedefs/xbd_chap12.html#tag_12_02">Section 12.2, Utility Syntax Guidelines</a>.</p>
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<p>The following options shall be supported:</p>
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<dl compact>
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<dt><b>-a</b></dt>
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<dd>Behave as though all of the options <b>-mnrsv</b> were specified.</dd>
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<dt><b>-m</b></dt>
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<dd>Write the name of the hardware type on which the system is running to standard output.</dd>
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<dt><b>-n</b></dt>
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<dd>Write the name of this node within an implementation-defined communications network.</dd>
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<dt><b>-r</b></dt>
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<dd>Write the current release level of the operating system implementation.</dd>
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<dt><b>-s</b></dt>
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<dd>Write the name of the implementation of the operating system.</dd>
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<dt><b>-v</b></dt>
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<dd>Write the current version level of this release of the operating system implementation.</dd>
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</dl>
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<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 been
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specified.</p>
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</blockquote>
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<h4><a name="tag_04_154_05"></a>OPERANDS</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_04_154_06"></a>STDIN</h4>
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<blockquote>
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<p>Not used.</p>
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</blockquote>
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<h4><a name="tag_04_154_07"></a>INPUT FILES</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_04_154_08"></a>ENVIRONMENT VARIABLES</h4>
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<blockquote>
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<p>The following environment variables shall affect the execution of <i>uname</i>:</p>
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<dl compact>
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<dt><i>LANG</i></dt>
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<dd>Provide a default value for the internationalization variables that are unset or null. (See the Base Definitions volume of
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IEEE Std 1003.1-2001, <a href="../basedefs/xbd_chap08.html#tag_08_02">Section 8.2, Internationalization Variables</a> for
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the precedence of internationalization variables used to determine the values of locale categories.)</dd>
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<dt><i>LC_ALL</i></dt>
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<dd>If set to a non-empty string value, override the values of all the other internationalization variables.</dd>
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<dt><i>LC_CTYPE</i></dt>
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<dd>Determine the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as
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opposed to multi-byte characters in arguments).</dd>
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<dt><i>LC_MESSAGES</i></dt>
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<dd>Determine the locale that should be used to affect the format and contents of diagnostic messages written to standard
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error.</dd>
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<dt><i>NLSPATH</i></dt>
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<dd><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]" border="0">
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Determine the location of message catalogs for the processing of <i>LC_MESSAGES .</i> <img src="../images/opt-end.gif" alt=
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"[Option End]" border="0"></dd>
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</dl>
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</blockquote>
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<h4><a name="tag_04_154_09"></a>ASYNCHRONOUS EVENTS</h4>
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<blockquote>
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<p>Default.</p>
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</blockquote>
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<h4><a name="tag_04_154_10"></a>STDOUT</h4>
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<blockquote>
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<p>By default, the output shall be a single line of the following form:</p>
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<pre>
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<tt>"%s\n", <</tt><i>sysname</i><tt>>
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</tt>
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</pre>
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<p>If the <b>-a</b> option is specified, the output shall be a single line of the following form:</p>
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<pre>
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<tt>"%s %s %s %s %s\n", <</tt><i>sysname</i><tt>>, <</tt><i>nodename</i><tt>>, <</tt><i>release</i><tt>>,
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<</tt><i>version</i><tt>>, <</tt><i>machine</i><tt>>
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</tt>
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</pre>
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<p>Additional implementation-defined symbols may be written; all such symbols shall be written at the end of the line of output
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before the <newline>.</p>
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<p>If options are specified to select different combinations of the symbols, only those symbols shall be written, in the order
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shown above for the <b>-a</b> option. If a symbol is not selected for writing, its corresponding trailing <blank>s also shall
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not be written.</p>
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</blockquote>
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<h4><a name="tag_04_154_11"></a>STDERR</h4>
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<blockquote>
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<p>The standard error shall be used only for diagnostic messages.</p>
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</blockquote>
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<h4><a name="tag_04_154_12"></a>OUTPUT FILES</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_04_154_13"></a>EXTENDED DESCRIPTION</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_04_154_14"></a>EXIT STATUS</h4>
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<blockquote>
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<p>The following exit values shall be returned:</p>
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<dl compact>
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<dt> 0</dt>
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<dd>The requested information was successfully written.</dd>
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<dt>>0</dt>
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<dd>An error occurred.</dd>
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</dl>
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</blockquote>
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<h4><a name="tag_04_154_15"></a>CONSEQUENCES OF ERRORS</h4>
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<blockquote>
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<p>Default.</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_04_154_16"></a>APPLICATION USAGE</h4>
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<blockquote>
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<p>Note that any of the symbols could include embedded <space>s, which may affect parsing algorithms if multiple options are
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selected for output.</p>
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<p>The node name is typically a name that the system uses to identify itself for inter-system communication addressing.</p>
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</blockquote>
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<h4><a name="tag_04_154_17"></a>EXAMPLES</h4>
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<blockquote>
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<p>The following command:</p>
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<pre>
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<tt>uname -sr
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</tt>
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</pre>
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<p>writes the operating system name and release level, separated by one or more <blank>s.</p>
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</blockquote>
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<h4><a name="tag_04_154_18"></a>RATIONALE</h4>
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<blockquote>
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<p>It was suggested that this utility cannot be used portably since the format of the symbols is implementation-defined. The
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POSIX.1 working group could not achieve consensus on defining these formats in the underlying <a href=
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"../functions/uname.html"><i>uname</i>()</a> function, and there was no expectation that this volume of
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IEEE Std 1003.1-2001 would be any more successful. Some applications may still find this historical utility of value. For
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example, the symbols could be used for system log entries or for comparison with operator or user input.</p>
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</blockquote>
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<h4><a name="tag_04_154_19"></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_04_154_20"></a>SEE ALSO</h4>
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<blockquote>
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<p>The System Interfaces volume of IEEE Std 1003.1-2001, <a href="../functions/uname.html"><i>uname</i>()</a></p>
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</blockquote>
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<h4><a name="tag_04_154_21"></a>CHANGE HISTORY</h4>
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<blockquote>
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<p>First released in Issue 2.</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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