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8 <title>rotatelogs - Piped logging program to rotate Apache logs - Apache HTTP Server</title>
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15 <p class="apache">Apache HTTP Server Version 2.0</p>
16 <img alt="" src="../images/feather.gif" /></div>
17 <div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
19 <a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.0</a> > <a href="./">Programs</a></div><div id="page-content"><div id="preamble"><h1>rotatelogs - Piped logging program to rotate Apache logs</h1>
21 <p><span>Available Languages: </span><a href="../en/programs/rotatelogs.html" title="English"> en </a> |
22 <a href="../ko/programs/rotatelogs.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> |
23 <a href="../tr/programs/rotatelogs.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p>
26 <p><code>rotatelogs</code> is a simple program for use in
27 conjunction with Apache's piped logfile feature. For example:</p>
29 <div class="example"><p><code>
30 CustomLog "|bin/rotatelogs /var/logs/logfile 86400" common
33 <p>This creates the files /var/logs/logfile.nnnn where nnnn is
34 the system time at which the log nominally starts (this time
35 will always be a multiple of the rotation time, so you can
36 synchronize cron scripts with it). At the end of each rotation
37 time (here after 24 hours) a new log is started.</p>
39 <div class="example"><p><code>
40 CustomLog "|bin/rotatelogs /var/logs/logfile 5M" common
43 <p>This configuration will rotate the logfile whenever it reaches
44 a size of 5 megabytes.</p>
46 <div class="example"><p><code>
47 ErrorLog "|bin/rotatelogs /var/logs/errorlog.%Y-%m-%d-%H_%M_%S 5M"
49 <p>This configuration will rotate the error logfile whenever it
50 reaches a size of 5 megabytes, and the suffix to the logfile name
51 will be created of the form
52 <code>errorlog.YYYY-mm-dd-HH_MM_SS</code>.</p>
55 <div id="quickview"><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#synopsis">Synopsis</a></li>
56 <li><img alt="" src="../images/down.gif" /> <a href="#options">Options</a></li>
57 <li><img alt="" src="../images/down.gif" /> <a href="#portability">Portability</a></li>
59 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
61 <h2><a name="synopsis" id="synopsis">Synopsis</a></h2>
63 <p><code><strong>rotatelogs</strong>
64 [ -<strong>l</strong> ]
66 [ <var>rotationtime</var> [ <var>offset</var> ]] |
67 [ <var>filesize</var>M ]</code></p>
68 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
70 <h2><a name="options" id="options">Options</a></h2>
74 <dt><code>-l</code> (<em>2.0.51 and later</em>)</dt>
75 <dd>Causes the use of local time rather than GMT as the base for the
76 interval. Note that using <code>-l</code> in an environment which changes the
77 GMT offset (such as for BST or DST) can lead to unpredictable results!</dd>
79 <dt><code><var>logfile</var></code></dt>
81 <dd>The path plus basename of the logfile. If <var>logfile</var>
82 includes any '%' characters, it is treated as a format string for
83 <code>strftime(3)</code>. Otherwise, the suffix
84 <var>.nnnnnnnnnn</var> is automatically added and is the time in
85 seconds. Both formats compute the start time from the beginning of
86 the current period.</dd>
88 <dt><code><var>rotationtime</var></code></dt>
90 <dd>The time between log file rotations in seconds.</dd>
92 <dt><code><var>offset</var></code></dt>
94 <dd>The number of minutes offset from UTC. If omitted, zero is
95 assumed and UTC is used. For example, to use local time in the zone
96 UTC -5 hours, specify a value of <code>-300</code> for this argument.</dd>
98 <dt><code><var>filesize</var>M</code></dt>
100 <dd>The maximum file size in megabytes followed by the letter
101 <code>M</code> to specify size rather than time. Use this parameter
102 in place of both rotationtime and offset.</dd>
104 </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
105 <div class="section">
106 <h2><a name="portability" id="portability">Portability</a></h2>
108 <p>The following logfile format string substitutions should be
109 supported by all <code>strftime(3)</code> implementations, see
110 the <code>strftime(3)</code> man page for library-specific
113 <table class="bordered"><tr><td><code>%A</code></td><td>full weekday name (localized)</td></tr>
114 <tr class="odd"><td><code>%a</code></td><td>3-character weekday name (localized)</td></tr>
115 <tr><td><code>%B</code></td><td>full month name (localized)</td></tr>
116 <tr class="odd"><td><code>%b</code></td><td>3-character month name (localized)</td></tr>
117 <tr><td><code>%c</code></td><td>date and time (localized)</td></tr>
118 <tr class="odd"><td><code>%d</code></td><td>2-digit day of month</td></tr>
119 <tr><td><code>%H</code></td><td>2-digit hour (24 hour clock)</td></tr>
120 <tr class="odd"><td><code>%I</code></td><td>2-digit hour (12 hour clock)</td></tr>
121 <tr><td><code>%j</code></td><td>3-digit day of year</td></tr>
122 <tr class="odd"><td><code>%M</code></td><td>2-digit minute</td></tr>
123 <tr><td><code>%m</code></td><td>2-digit month</td></tr>
124 <tr class="odd"><td><code>%p</code></td><td>am/pm of 12 hour clock (localized)</td></tr>
125 <tr><td><code>%S</code></td><td>2-digit second</td></tr>
126 <tr class="odd"><td><code>%U</code></td><td>2-digit week of year
127 (Sunday first day of week)</td></tr>
128 <tr><td><code>%W</code></td><td>2-digit week of year
129 (Monday first day of week)</td></tr>
130 <tr class="odd"><td><code>%w</code></td><td>1-digit weekday
131 (Sunday first day of week)</td></tr>
132 <tr><td><code>%X</code></td><td>time (localized)</td></tr>
133 <tr class="odd"><td><code>%x</code></td><td>date (localized)</td></tr>
134 <tr><td><code>%Y</code></td><td>4-digit year</td></tr>
135 <tr class="odd"><td><code>%y</code></td><td>2-digit year</td></tr>
136 <tr><td><code>%Z</code></td><td>time zone name</td></tr>
137 <tr class="odd"><td><code>%%</code></td><td>literal `%'</td></tr>
141 <div class="bottomlang">
142 <p><span>Available Languages: </span><a href="../en/programs/rotatelogs.html" title="English"> en </a> |
143 <a href="../ko/programs/rotatelogs.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> |
144 <a href="../tr/programs/rotatelogs.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p>
145 </div><div id="footer">
146 <p class="apache">Copyright 2009 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
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