JargonFile/original/html/S/sponge.html
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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>sponge</title><link rel="stylesheet" href="../../jargon.css" type="text/css"/><meta name="generator" content="DocBook XSL Stylesheets V1.61.0"/><link rel="home" href="../index.html" title="The Jargon File"/><link rel="up" href="../S.html" title="S"/><link rel="previous" href="spoiler-space.html" title="spoiler space"/><link rel="next" href="spoof.html" title="spoof"/></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">sponge</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="spoiler-space.html">Prev</a> </td><th width="60%" align="center">S</th><td width="20%" align="right"> <a accesskey="n" href="spoof.html">Next</a></td></tr></table><hr/></div><dt><a id="sponge"/><dt xmlns="" id="sponge"><b>sponge</b>: <span xmlns="http://www.w3.org/1999/xhtml" class="grammar">n.</span></dt></dt><dd><p> [Unix] A special case of a <a href="../F/filter.html"><i class="glossterm">filter</i></a> that reads
its entire input before writing any output; the canonical example is a sort
utility. Unlike most filters, a sponge can conveniently overwrite the
input file with the output data stream. If a file system has versioning
(as ITS did and VMS does now) the sponge/filter distinction loses its
usefulness, because directing filter output would just write a new version.
See also <a href="slurp.html"><i class="glossterm">slurp</i></a>.</p></dd><div class="navfooter"><hr/><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="spoiler-space.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="../S.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="spoof.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">spoiler space </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> spoof</td></tr></table></div></body></html>