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<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE manualpage SYSTEM "../style/manualpage.dtd">
<?xml-stylesheet type="text/xsl" href="../style/manual.en.xsl"?>
<!-- $Revision: 1.9 $ -->
<!--
Copyright 2003-2004 The Apache Software Foundation
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<manualpage metafile="rotatelogs.xml.meta">
<parentdocument href="./">Programs</parentdocument>
<title>rotatelogs - Piped logging program to rotate Apache logs</title>
<summary>
<p><code>rotatelogs</code> is a simple program for use in
conjunction with Apache's piped logfile feature. For example:</p>
<example>
CustomLog "|bin/rotatelogs /var/logs/logfile 86400" common
</example>
<p>This creates the files /var/logs/logfile.nnnn where nnnn is
the system time at which the log nominally starts (this time
will always be a multiple of the rotation time, so you can
synchronize cron scripts with it). At the end of each rotation
time (here after 24 hours) a new log is started.</p>
<example>
CustomLog "|bin/rotatelogs /var/logs/logfile 5M" common
</example>
<p>This configuration will rotate the logfile whenever it reaches
a size of 5 megabytes.</p>
<example>
ErrorLog "|bin/rotatelogs /var/logs/errorlog.%Y-%m-%d-%H_%M_%S 5M"
</example>
<p>This configuration will rotate the error logfile whenever it
reaches a size of 5 megabytes, and the suffix to the logfile name
will be created of the form
<code>errorlog.YYYY-mm-dd-HH_MM_SS</code>.</p>
</summary>
<section id="synopsis"><title>Synopsis</title>
<p><code><strong>rotatelogs</strong>
[ -<strong>l</strong> ]
<var>logfile</var>
[ <var>rotationtime</var> [ <var>offset</var> ]] |
[ <var>filesize</var>M ]</code></p>
</section>
<section id="options"><title>Options</title>
<dl>
<dt><code>-l</code></dt>
<dd>causes the use of local time rather than GMT as the base for the
interval. Note that using <code>-l</code> in an environment which changes the
GMT offset (such as for BST or DST) can lead to unpredictable results!</dd>
<dt><code><var>logfile</var></code></dt>
<dd>The path plus basename of the logfile. If <var>logfile</var>
includes any '%' characters, it is treated as a format string for
<code>strftime(3)</code>. Otherwise, the suffix
<var>.nnnnnnnnnn</var> is automatically added and is the time in
seconds. Both formats compute the start time from the beginning of
the current period.</dd>
<dt><code><var>rotationtime</var></code></dt>
<dd>The time between log file rotations in seconds.</dd>
<dt><code><var>offset</var></code></dt>
<dd>The number of minutes offset from UTC. If omitted, zero is
assumed and UTC is used. For example, to use local time in the zone
UTC -5 hours, specify a value of <code>-300</code> for this argument.</dd>
<dt><code><var>filesize</var>M</code></dt>
<dd>The maximum file size in megabytes followed by the letter
<code>M</code> to specify size rather than time. Use this parameter
in place of both rotationtime and offset.</dd>
</dl>
</section>
<section id="portability"><title>Portability</title>
<p>The following logfile format string substitutions should be
supported by all <code>strftime(3)</code> implementations, see
the <code>strftime(3)</code> man page for library-specific
extensions.</p>
<table border="1" style="zebra">
<tr><td><code>%A</code></td><td>full weekday name (localized)</td></tr>
<tr><td><code>%a</code></td><td>3-character weekday name (localized)</td></tr>
<tr><td><code>%B</code></td><td>full month name (localized)</td></tr>
<tr><td><code>%b</code></td><td>3-character month name (localized)</td></tr>
<tr><td><code>%c</code></td><td>date and time (localized)</td></tr>
<tr><td><code>%d</code></td><td>2-digit day of month</td></tr>
<tr><td><code>%H</code></td><td>2-digit hour (24 hour clock)</td></tr>
<tr><td><code>%I</code></td><td>2-digit hour (12 hour clock)</td></tr>
<tr><td><code>%j</code></td><td>3-digit day of year</td></tr>
<tr><td><code>%M</code></td><td>2-digit minute</td></tr>
<tr><td><code>%m</code></td><td>2-digit month</td></tr>
<tr><td><code>%p</code></td><td>am/pm of 12 hour clock (localized)</td></tr>
<tr><td><code>%S</code></td><td>2-digit second</td></tr>
<tr><td><code>%U</code></td><td>2-digit week of year
(Sunday first day of week)</td></tr>
<tr><td><code>%W</code></td><td>2-digit week of year
(Monday first day of week)</td></tr>
<tr><td><code>%w</code></td><td>1-digit weekday
(Sunday first day of week)</td></tr>
<tr><td><code>%X</code></td><td>time (localized)</td></tr>
<tr><td><code>%x</code></td><td>date (localized)</td></tr>
<tr><td><code>%Y</code></td><td>4-digit year</td></tr>
<tr><td><code>%y</code></td><td>2-digit year</td></tr>
<tr><td><code>%Z</code></td><td>time zone name</td></tr>
<tr><td><code>%%</code></td><td>literal `%'</td></tr>
</table>
</section>
</manualpage>
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