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HTML
220 lines
9.2 KiB
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>db_printlog</title>
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<link rel="stylesheet" href="apiReference.css" type="text/css" />
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<meta name="generator" content="DocBook XSL Stylesheets V1.73.2" />
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<link rel="start" href="index.html" title="Berkeley DB C API Reference" />
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<link rel="up" href="utilities.html" title="Appendix A. Berkeley DB Command Line Utilities" />
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<link rel="prev" href="db_log_verify.html" title="db_log_verify" />
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<link rel="next" href="db_recover.html" title="db_recover" />
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</head>
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<body>
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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 11.2.5.2</p>
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</div>
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<table width="100%" summary="Navigation header">
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<tr>
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<th colspan="3" align="center">db_printlog</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="db_log_verify.html">Prev</a> </td>
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<th width="60%" align="center">Appendix A.
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Berkeley DB Command Line Utilities
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</th>
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<td width="20%" align="right"> <a accesskey="n" href="db_recover.html">Next</a></td>
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</tr>
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</table>
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<hr />
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</div>
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<div class="sect1" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h2 class="title" style="clear: both"><a id="db_printlog"></a>db_printlog</h2>
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</div>
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</div>
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</div>
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<pre class="programlisting">db_printlog [-NrV] [-b start-LSN] [-e stop-LSN] [-h home] [-P password] </pre>
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<p>
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The <span class="command"><strong>db_printlog</strong></span> utility is a debugging utility that dumps Berkeley DB
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log files in a human-readable format.
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</p>
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<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
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<h3 class="title">Note</h3>
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<p>
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If the application(s) that use the environment make use of
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any of the following methods:
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</p>
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<table class="simplelist" border="0" summary="Simple list">
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<tr>
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<td>
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<a class="xref" href="envadd_data_dir.html" title="DB_ENV->add_data_dir()">DB_ENV->add_data_dir()</a>
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</td>
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</tr>
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<tr>
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<td>
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<a class="xref" href="envset_data_dir.html" title="DB_ENV->set_data_dir()">DB_ENV->set_data_dir()</a>
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</td>
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</tr>
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<tr>
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<td>
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<a class="xref" href="envset_lg_dir.html" title="DB_ENV->set_lg_dir()">DB_ENV->set_lg_dir()</a>
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</td>
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</tr>
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</table>
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<p>
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then in order for this utility to run correctly, you need a
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<a href="../../programmer_reference/env_db_config.html#env_db_config.DB_CONFIG" class="olink">DB_CONFIG</a>
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file which sets the proper paths using the
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<a class="xref" href="add_data_dir_parameter.html" title="add_data_dir">add_data_dir</a>, or
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<a class="xref" href="set_lg_dir_parameter.html" title="set_lg_dir">set_lg_dir</a>
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configuration parameters.
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</p>
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</div>
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<p>
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The options are as follows:
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</p>
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<div class="itemizedlist">
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<ul type="disc">
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<li>
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<p>
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<span class="bold"><strong>-b</strong></span>
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</p>
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<p>
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Display log records starting at log sequence number (LSN) <span class="bold"><strong>start-LSN</strong></span>; <span class="bold"><strong>start-LSN</strong></span> is specified as a file number,
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followed by a slash (/) character, followed by an offset number, with
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no intervening whitespace.
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</p>
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</li>
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<li>
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<p>
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<span class="bold"><strong>-e</strong></span>
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</p>
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<p>
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Stop displaying log records at log sequence number (LSN) <span class="bold"><strong>stop-LSN</strong></span>; <span class="bold"><strong>stop-LSN</strong></span> is specified as a file number,
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followed by a slash (/) character, followed by an offset number, with
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no intervening whitespace.
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</p>
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</li>
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<li>
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<p>
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<span class="bold"><strong>-h</strong></span>
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</p>
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<p>
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Specify a home directory for the database environment; by default, the
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current working directory is used.
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</p>
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</li>
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<li>
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<p>
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<span class="bold"><strong>-N</strong></span>
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</p>
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<p>
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Do not acquire shared region mutexes while running. Other problems,
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such as potentially fatal errors in Berkeley DB, will be ignored as
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well. This option is intended only for debugging errors, and should
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not be used under any other circumstances.
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</p>
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</li>
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<li>
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<p>
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<span class="bold"><strong>-P</strong></span>
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</p>
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<p>
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Specify an environment password. Although Berkeley DB utilities
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overwrite password strings as soon as possible, be aware there may be
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a window of vulnerability on systems where unprivileged users can see
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command-line arguments or where utilities are not able to overwrite
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the memory containing the command-line arguments.
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</p>
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</li>
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<li>
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<p>
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<span class="bold"><strong>-r</strong></span>
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</p>
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<p>
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Read the log files in reverse order.
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</p>
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</li>
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<li>
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<p>
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<span class="bold"><strong>-V</strong></span>
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</p>
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<p>
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Write the library version number to the standard output, and exit.
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</p>
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</li>
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</ul>
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</div>
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<p>
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For more information on the <span class="command"><strong>db_printlog</strong></span> output and using it to debug
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applications, see
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<a href="../../installation/debug_printlog.html" class="olink">Reviewing Berkeley DB log files</a>.
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</p>
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<p>
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The <span class="command"><strong>db_printlog</strong></span> utility uses a Berkeley DB environment (as described
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for the <span class="bold"><strong>-h</strong></span> option, the environment
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variable <span class="bold"><strong>DB_HOME</strong></span>, or because the
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utility was run in a directory containing a Berkeley DB environment).
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In order to avoid environment corruption when using a Berkeley DB
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environment, <span class="command"><strong>db_printlog</strong></span> should always be given the chance to detach
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from the environment and exit gracefully. To cause <span class="command"><strong>db_printlog</strong></span> to
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release all environment resources and exit cleanly, send it an
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interrupt signal (SIGINT).
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</p>
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<p>
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The <span class="command"><strong>db_printlog</strong></span> utility exits 0 on success, and >0 if an error
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occurs.
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</p>
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<div class="sect2" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h3 class="title"><a id="id3948054"></a>Environment Variables</h3>
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</div>
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</div>
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</div>
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<div class="sect3" lang="en" xml:lang="en">
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<div class="titlepage">
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<div>
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<div>
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<h4 class="title"><a id="id3948057"></a>DB_HOME</h4>
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</div>
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</div>
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</div>
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<p>
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If the <span class="bold"><strong>-h</strong></span> option is not specified and
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the environment variable DB_HOME is set, it is used as the path of the
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database home, as described in the
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<a class="xref" href="envopen.html" title="DB_ENV->open()">DB_ENV->open()</a>
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method.
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</p>
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</div>
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</div>
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</div>
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<div class="navfooter">
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<hr />
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<table width="100%" summary="Navigation footer">
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<tr>
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<td width="40%" align="left"><a accesskey="p" href="db_log_verify.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="utilities.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="db_recover.html">Next</a></td>
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</tr>
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<tr>
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<td width="40%" align="left" valign="top">db_log_verify </td>
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<td width="20%" align="center">
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<a accesskey="h" href="index.html">Home</a>
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</td>
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<td width="40%" align="right" valign="top"> db_recover</td>
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</tr>
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</table>
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</div>
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</body>
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</html>
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