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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>logname</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_1232"> </a>NAME</h4><blockquote>logname - return the user's login name</blockquote><h4><a name = "tag_001_014_1233"> </a>SYNOPSIS</h4><blockquote><pre><code>logname</code></pre></blockquote><h4><a name = "tag_001_014_1234"> </a>DESCRIPTION</h4><blockquote>The<i>logname</i>utility will write the user's login name to standard output.The login name isthe string that would be returned by the <b>XSH</b> specification<i><a href="../xsh/getlogin.html">getlogin()</a></i>function.Under the conditions where the<i><a href="../xsh/getlogin.html">getlogin()</a></i>function would fail, the<i>logname</i>utility will write a diagnostic message to standard errorand exit with a non-zero exit status.</blockquote><h4><a name = "tag_001_014_1235"> </a>OPTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1236"> </a>OPERANDS</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1237"> </a>STDIN</h4><blockquote>Not used.</blockquote><h4><a name = "tag_001_014_1238"> </a>INPUT FILES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1239"> </a>ENVIRONMENT VARIABLES</h4><blockquote>The following environment variables affect the execution of<i>logname</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_1240"> </a>ASYNCHRONOUS EVENTS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_1241"> </a>STDOUT</h4><blockquote>The<i>logname</i>utility output will be a single line consisting of the user's login name:<p><code><tt>"%s\n"</tt>, <<i>login name</i>></code></blockquote><h4><a name = "tag_001_014_1242"> </a>STDERR</h4><blockquote>Used only for diagnostic messages.</blockquote><h4><a name = "tag_001_014_1243"> </a>OUTPUT FILES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1244"> </a>EXTENDED DESCRIPTION</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1245"> </a>EXIT STATUS</h4><blockquote>The following exit values are returned:<dl compact><dt>0<dd>Successful completion.<dt>>0<dd>An error occurred.</dl></blockquote><h4><a name = "tag_001_014_1246"> </a>CONSEQUENCES OF ERRORS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_1247"> </a>APPLICATION USAGE</h4><blockquote>The<i>logname</i>utilityexplicitly ignores the<i>LOGNAME</i>environment variable because environment changescould produce erroneous results.</blockquote><h4><a name = "tag_001_014_1248"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1249"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1250"> </a>SEE ALSO</h4><blockquote><i><a href="id.html">id</a></i>,<i><a href="who.html">who</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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