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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>man</title></head><body bgcolor=white><center><font size=2>The Single UNIX &reg; Specification, Version 2<br>Copyright &copy; 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_001_014_1384">&nbsp;</a>NAME</h4><blockquote>man - display system documentation</blockquote><h4><a name = "tag_001_014_1385">&nbsp;</a>SYNOPSIS</h4><blockquote><pre><code>man <b>[</b>-k<b>]</b><i> name</i>...</code></pre></blockquote><h4><a name = "tag_001_014_1386">&nbsp;</a>DESCRIPTION</h4><blockquote>The<i>man</i>utility writes information about each of the<i>name</i>operands.If<i>name</i>is the name of a standard utility,<i>man</i>will at a minimumwrite a message describing the syntaxused by the standard utility, its options and operands.If more information is available, the<i>man</i>utility will provide it in an implementation-dependent manner.<p>An implementation may provide information for values of<i>name</i>other than the standard utilities.Standard utilities that are listed as optional and thatare not supported by the implementationeither will causea brief message indicating that fact to be displayedor will cause a full display of information as described previously.</blockquote><h4><a name = "tag_001_014_1387">&nbsp;</a>OPTIONS</h4><blockquote>The<i>man</i>utility supports the <b>XBD</b> specification, <a href="../xbd/utilconv.html#usg"><b>Utility Syntax Guidelines</b>&nbsp;</a> .<p>The following option is supported:<dl compact><dt><b>-k</b><dd>Interpret<i>name</i>operands as keywords to be used in searching autilities summary database that contains a briefpurpose entry for each standard utilityand write lines from the summary databasethat match any of the keywords.The keyword search produces results thatare the equivalent of the output of the following command:<pre><code>grep -Ei '<i>name</i><i>name</i>' <i>summary-database</i></code></pre>This assumes that the<i>summary-database</i>is a text file with a single entry per line;this organisation is not required and the example using<i><a href="grep.html">grep</a></i><b>-Ei</b>is merely illustrative of the type of search intended.The purpose entry to be included in the databaseconsists of a terse description of the purpose of the utility.</dl></blockquote><h4><a name = "tag_001_014_1388">&nbsp;</a>OPERANDS</h4><blockquote>The following operand is supported:<dl compact><dt><i>name</i><dd>A keyword or the name of a standard utility.When<b>-k</b>is not specified and<i>name</i>does not represent one of the standard utilities, the results are unspecified.</dl></blockquote><h4><a name = "tag_001_014_1389">&nbsp;</a>STDIN</h4><blockquote>Not used.</blockquote><h4><a name = "tag_001_014_1390">&nbsp;</a>INPUT FILES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1391">&nbsp;</a>ENVIRONMENT VARIABLES</h4><blockquote>The following environment variables affect the execution of<i>man</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 and in the summary database).The value of<i>LC_CTYPE</i>need not affect the format of the information written about the nameoperands.<dt><i>LC_MESSAGES</i><dd>Determine the locale that should be used to affectthe format and contents of diagnosticmessages written to standard errorand informative messages written to standard output.<dt><i>NLSPATH</i><dd>Determine the location of message cataloguesfor the processing of<i>LC_MESSAGES .</i><dt><i>PAGER</i><dd>Determine an output filtering command for writingthe output to a terminal.Any string acceptable as a<i>command_string</i>operand to the<i><a href="sh.html">sh</a></i><b>-c</b>command is valid.When standard output is a terminal device,the manual-page output will be pipedthrough the command.If the<i>PAGER</i>variable is null or not set,the command will be either<i><a href="more.html">more</a></i>or another paginator utility documented in the system documentation.</dl></blockquote><h4><a name = "tag_001_014_1392">&nbsp;</a>ASYNCHRONOUS EVENTS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_1393">&nbsp;</a>STDOUT</h4><blockquote>The<i>man</i>utility writes text describing the syntaxof the utility<i>name,</i>its options and its operands,or, when<b>-k</b>is specified,lines from the summary database.The format of this text is implementation-dependent.</blockquote><h4><a name = "tag_001_014_1394">&nbsp;</a>STDERR</h4><blockquote>Used only for diagnostic messages.</blockquote><h4><a name = "tag_001_014_1395">&nbsp;</a>OUTPUT FILES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1396">&nbsp;</a>EXTENDED DESCRIPTION</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1397">&nbsp;</a>EXIT STATUS</h4><blockquote>The following exit values are returned:<dl compact><dt>0<dd>Successful completion.<dt>&gt;0<dd>An error occurred.</dl></blockquote><h4><a name = "tag_001_014_1398">&nbsp;</a>CONSEQUENCES OF ERRORS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_1399">&nbsp;</a>APPLICATION USAGE</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1400">&nbsp;</a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1401">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>The IEEE PASC 1003.2 Interpretations Committee has forwarded concerns aboutparts of this interface definition to the IEEE PASC Shell and Utilities Working Groupwhich is identifying the corrections.A future revision of this specification will align withIEEE Std. 1003.2b when finalised.</blockquote><h4><a name = "tag_001_014_1402">&nbsp;</a>SEE ALSO</h4><blockquote><i><a href="more.html">more</a></i>.</blockquote><hr size=2 noshade><center><font size=2>UNIX &reg; is a registered Trademark of The Open Group.<br>Copyright &copy; 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>
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