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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>logger</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_1213"> </a>NAME</h4><blockquote>logger - log messages</blockquote><h4><a name = "tag_001_014_1214"> </a>SYNOPSIS</h4><blockquote><pre><code>logger <i>string</i> ...</code></pre></blockquote><h4><a name = "tag_001_014_1215"> </a>DESCRIPTION</h4><blockquote>The<i>logger</i>utility saves a message, in an unspecified manner and format,containing the<i>string</i>operands provided by the user.The messages are expected to be evaluated later by personnelperforming system administration tasks.<p>It is implementation-dependent whether messages written inlocales other than the POSIX locale are effective.</blockquote><h4><a name = "tag_001_014_1216"> </a>OPTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1217"> </a>OPERANDS</h4><blockquote>The following operand is supported:<dl compact><dt><i>string</i><dd>One of the string arguments whose contents are concatenated together,in the order specified, separated by single space characters.</dl></blockquote><h4><a name = "tag_001_014_1218"> </a>STDIN</h4><blockquote>Not used.</blockquote><h4><a name = "tag_001_014_1219"> </a>INPUT FILES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1220"> </a>ENVIRONMENT VARIABLES</h4><blockquote>The following environment variables affect the execution of<i>logger</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.(This means diagnostics from<i>logger</i>to the user or application, not diagnostic messagesthat the user is sending to the system administrator.)<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_1221"> </a>ASYNCHRONOUS EVENTS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_1222"> </a>STDOUT</h4><blockquote>Not used.</blockquote><h4><a name = "tag_001_014_1223"> </a>STDERR</h4><blockquote>Used only for diagnostic messages.</blockquote><h4><a name = "tag_001_014_1224"> </a>OUTPUT FILES</h4><blockquote>Unspecified.</blockquote><h4><a name = "tag_001_014_1225"> </a>EXTENDED DESCRIPTION</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1226"> </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_1227"> </a>CONSEQUENCES OF ERRORS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_1228"> </a>APPLICATION USAGE</h4><blockquote>This utility allows logging of information for later use bya system administrator or programmer in determining whynon-interactive utilities have failed.The locations of the saved messages, their format and retention periodare all unspecified.There is no methodfor a portable application to read messages, once written.</blockquote><h4><a name = "tag_001_014_1229"> </a>EXAMPLES</h4><blockquote>A batch application, running non-interactively,tries to read a configuration file and fails; it mayattempt to notify the system administrator with:<pre><code>logger myname: unable to read file foo. [timestamp]</code></pre></blockquote><h4><a name = "tag_001_014_1230"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1231"> </a>SEE ALSO</h4><blockquote><i><a href="mailx.html">mailx</a></i>,<i><a href="write.html">write</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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