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188 lines
8 KiB
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>db_verify</title>
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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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<div xmlns="" class="navheader">
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<div class="libver">
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<p>Library Version 11.2.5.3</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_verify</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_upgrade.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="sqlite3.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_verify"></a>db_verify</h2>
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</div>
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</div>
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</div>
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<pre class="programlisting">db_verify [-NoqV] [-h home] [-P password] file ... </pre>
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<p>
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The <span class="command"><strong>db_verify</strong></span> utility verifies the structure of one or more files and
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the databases they contain.
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</p>
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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>-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>-o</strong></span>
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</p>
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<p>
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Skip the database checks for btree and duplicate sort order and for
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hashing.
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</p>
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<p>
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If the file being verified contains databases with non-default
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comparison or hashing configurations, calling the <span class="command"><strong>db_verify</strong></span> utility
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without the <span class="bold"><strong>-o</strong></span> flag will usually
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return failure. The <span class="bold"><strong>-o</strong></span> flag causes
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<span class="command"><strong>db_verify</strong></span> to ignore database sort or hash ordering and allows
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<span class="command"><strong>db_verify</strong></span> to be used on these files. To fully verify these files,
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verify them explicitly using the <a class="xref" href="dbverify.html" title="DB->verify()">DB->verify()</a>
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method, after configuring the correct comparison or hashing functions.
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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>-q</strong></span>
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</p>
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<p>
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Suppress the printing of any error descriptions, simply exit success
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or failure.
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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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<span class="bold"><strong>The <span class="command"><strong>db_verify</strong></span> utility does not perform any
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locking, even in Berkeley DB environments that are configured with a
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locking subsystem. As such, it should only be used on files that are
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not being modified by another thread of control.</strong></span>
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</p>
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<p>
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The <span class="command"><strong>db_verify</strong></span> utility may be used with a Berkeley DB environment (as
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described for the <span class="bold"><strong>-h</strong></span> option, the
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environment variable <span class="bold"><strong>DB_HOME</strong></span>, or
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because the utility was run in a directory containing a Berkeley DB
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environment). In order to avoid environment corruption when using a
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Berkeley DB environment, <span class="command"><strong>db_verify</strong></span> should always be given the chance
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to detach from the environment and exit gracefully. To cause
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<span class="command"><strong>db_verify</strong></span> to release all environment resources and exit cleanly, send
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it an interrupt signal (SIGINT).
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</p>
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<p>
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The <span class="command"><strong>db_verify</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="idp63446120"></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="idp63446312"></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_upgrade.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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</tr>
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<tr>
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<td width="40%" align="left" valign="top">db_upgrade </td>
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<td width="20%" align="center">
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