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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>wc</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_2847"> </a>NAME</h4><blockquote>wc - word, line and byte or character count</blockquote><h4><a name = "tag_001_014_2848"> </a>SYNOPSIS</h4><blockquote><pre><code>wc <b>[</b>-c|-m<b>][</b>-lw<b>][</b><i>file</i>...<b>]</b></code></pre></blockquote><h4><a name = "tag_001_014_2849"> </a>DESCRIPTION</h4><blockquote>The<i>wc</i>utility reads one or more input filesand, by default, writes the number ofnewline characters,words and bytes contained in each input file to the standard output.<p>The utility also writes a total count for all named files,if more than one input file is specified.<p>The<i>wc</i>utility considers a<i>word</i>to be a non-zero-length string of characters delimited by white space.</blockquote><h4><a name = "tag_001_014_2850"> </a>OPTIONS</h4><blockquote>The<i>wc</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>-c</b><dd>Write to the standard output the number of bytes in each input file.<dt><b>-l</b><dd>Write to the standard output the number ofnewline charactersin each input file.<dt><b>-m</b><dd>Write to the standard output the number of characters in each input file.<dt><b>-w</b><dd>Write to the standard output the number of words in each input file.</dl><p>When any option is specified,<i>wc</i>will report only the information requested by the specified options.</blockquote><h4><a name = "tag_001_014_2851"> </a>OPERANDS</h4><blockquote>The following operand is supported:<dl compact><dt><i>file</i><dd>A pathname of an input file.If no<i>file</i>operands are specified,the standard input will be used.</dl></blockquote><h4><a name = "tag_001_014_2852"> </a>STDIN</h4><blockquote>The standard input will be used only if no<i>file</i>operands are specified.See the INPUT FILES section.</blockquote><h4><a name = "tag_001_014_2853"> </a>INPUT FILES</h4><blockquote>The input files may be of any type.</blockquote><h4><a name = "tag_001_014_2854"> </a>ENVIRONMENT VARIABLES</h4><blockquote>The following environment variables affect the execution of<i>wc</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 input files)and which characters are defined as white space characters.<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></dl></blockquote><h4><a name = "tag_001_014_2855"> </a>ASYNCHRONOUS EVENTS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_2856"> </a>STDOUT</h4><blockquote>By default, the standard output contains an entry foreach input file of the form:<p><code><tt>"%d %d %d %s\n"</tt>, <<i>newlines</i>>,<<i>words</i>>,<<i>bytes</i>>,<<i>file</i>></code><p>If the<b>-m</b>option is specified, the number of characters replace the<<i>bytes</i>>field in this format.<p>If any options are specified and the<b>-l</b>option is not specified, thenumber ofnewline characterswill not be written.<p>If any options are specified and the<b>-w</b>option is not specified, thenumber of words will not be written.<p>If any options are specified and neither<b>-c</b>nor<b>-m</b>is specified, thenumber of bytes or characters will not be written.<p>If no input<i>file</i>operands are specified, no name will be written and noblank characterspreceding the pathname will be written.<p>If more than one input<i>file</i>operand is specified, an additional linewill be written, of the same format as the other lines, except thatthe word<b>total</b>(in the POSIX locale)will be written instead of a pathnameand the total of each column will be written as appropriate.Such an additional line, if any, will be written at the end of the output.</blockquote><h4><a name = "tag_001_014_2857"> </a>STDERR</h4><blockquote>Used only for diagnostic messages.</blockquote><h4><a name = "tag_001_014_2858"> </a>OUTPUT FILES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_2859"> </a>EXTENDED DESCRIPTION</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_2860"> </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_2861"> </a>CONSEQUENCES OF ERRORS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_2862"> </a>APPLICATION USAGE</h4><blockquote>The<b>-m</b>option is not a switch,but an option at the same level as<b>-c</b>.Thus, to produce the full default output with character countsinstead of bytes, the command required is:<pre><code>wc -mlw</code></pre></blockquote><h4><a name = "tag_001_014_2863"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_2864"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_2865"> </a>SEE ALSO</h4><blockquote><i><a href="cksum.html">cksum</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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