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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>tee</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_2239"> </a>NAME</h4><blockquote>tee - duplicate standard input</blockquote><h4><a name = "tag_001_014_2240"> </a>SYNOPSIS</h4><blockquote><pre><code>tee <b>[</b>-ai<b>][</b><i>file</i>...<b>]</b></code></pre></blockquote><h4><a name = "tag_001_014_2241"> </a>DESCRIPTION</h4><blockquote>The<i>tee</i>utility will copy standard input to standard output,making a copy in zero or more files.The<i>tee</i>utility will not buffer output.<p>The options determine if the specified files are overwrittenor appended to.</blockquote><h4><a name = "tag_001_014_2242"> </a>OPTIONS</h4><blockquote>The<i>tee</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>-a </b><dd><dt><b>-a </b><i>(null)</i><dd>Append the output to the files rather than overwriting them.<dt><b>-i </b><dd><dt><b>-i </b><i>(null)</i><dd>Ignore the SIGINT signal.</dl></blockquote><h4><a name = "tag_001_014_2243"> </a>OPERANDS</h4><blockquote>The following operands are supported:<dl compact><dt><i>file</i><dd>A pathname of an output file.Processing of at least 13<i>file</i>operands will be supported.</dl></blockquote><h4><a name = "tag_001_014_2244"> </a>STDIN</h4><blockquote>The standard input can be of any type.</blockquote><h4><a name = "tag_001_014_2245"> </a>INPUT FILES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_2246"> </a>ENVIRONMENT VARIABLES</h4><blockquote>The following environment variables affect the execution of<i>tee</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_2247"> </a>ASYNCHRONOUS EVENTS</h4><blockquote>Default, except that if the<b>-i</b>option was specified, SIGINT will be ignored.</blockquote><h4><a name = "tag_001_014_2248"> </a>STDOUT</h4><blockquote>The standard output will be a copy of the standard input.</blockquote><h4><a name = "tag_001_014_2249"> </a>STDERR</h4><blockquote>Used only for diagnostic messages.</blockquote><h4><a name = "tag_001_014_2250"> </a>OUTPUT FILES</h4><blockquote>If any<i>file</i>operands are specified, the standard input will becopied to each named file.</blockquote><h4><a name = "tag_001_014_2251"> </a>EXTENDED DESCRIPTION</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_2252"> </a>EXIT STATUS</h4><blockquote>The following exit values are returned:<dl compact><dt>0<dd>The standard input was successfully copied to all output files.<dt>>0<dd>An error occurred.</dl></blockquote><h4><a name = "tag_001_014_2253"> </a>CONSEQUENCES OF ERRORS</h4><blockquote>If a write to any successfully opened<i>file</i>operand fails,writes to other successfully opened<i>file</i>operands and standard output will continue,but the exit status will be non-zero.Otherwise, the default actions specified in<a href="utildes.html">Utility Description Defaults</a><xref href=utildes></xref>will apply.</blockquote><h4><a name = "tag_001_014_2254"> </a>APPLICATION USAGE</h4><blockquote>The<i>tee</i>utility is usually used in a pipeline, to make a copy of theoutput of some utility.<p>The<i>file</i>operand is technically optional, but<i>tee</i>is no more useful than<i><a href="cat.html">cat</a></i>when none is specified.</blockquote><h4><a name = "tag_001_014_2255"> </a>EXAMPLES</h4><blockquote>Save an unsorted intermediate form of the data in a pipeline:<pre><code>. . . | tee unsorted | sort > sorted </code></pre></blockquote><h4><a name = "tag_001_014_2256"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_2257"> </a>SEE ALSO</h4><blockquote><i><a href="cat.html">cat</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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