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<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright © 2006 Joey Hess
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
version 2 as published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA
-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V4.4//EN"
"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd"
[]>
<refentry>
<refentryinfo>
<author>
<firstname>Joey</firstname>
<surname>Hess</surname>
</author>
<date>2006-02-19</date>
</refentryinfo>
<refmeta>
<refentrytitle>sponge</refentrytitle>
<manvolnum>1</manvolnum>
<refmiscinfo class="manual">moreutils</refmiscinfo>
<refmiscinfo class="source">moreutils</refmiscinfo>
</refmeta>
<refnamediv>
<refname>sponge</refname>
<refpurpose>soak up standard input and write to a file</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>sed '...' file | grep '...' | sponge [-a] file</command>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>DESCRIPTION</title>
<para><command>sponge</command> reads standard input and
writes it out to the specified file. Unlike a shell
redirect, <command>sponge</command> soaks up all its input before
writing the output file. This allows constructing
pipelines that read from and write to
the same file.
</para>
<para>
<command>sponge</command> preserves the
permissions of the output file
if it already exists.
</para>
<para>
When possible, <command>sponge</command> creates or updates the
output file atomically by renaming a temp
file into place. (This cannot be done
if TMPDIR is not in the same filesystem.)
</para>
<para>
If the output file is a special file or symlink,
the data will be written to it, non-atomically.
</para>
<para>
If no file is specified, <command>sponge</command> outputs to
stdout.
</para>
</refsect1>
<refsect1>
<title>OPTIONS</title>
<variablelist>
<varlistentry>
<term><option>-a</option></term>
<listitem>
<para>
Replace the file
with a new file that contains
the file's original content,
with the standard input
appended to it. This is done
atomically when possible.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>AUTHOR</title>
<para>
Colin Watson and Tollef Fog Heen
</para>
</refsect1>
</refentry>
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