1<?xml version="1.0" encoding="UTF-8" standalone="no"?> 2<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3<html xmlns="http://www.w3.org/1999/xhtml"> 4 <head> 5 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> 6 <title>db_verify</title> 7 <link rel="stylesheet" href="apiReference.css" type="text/css" /> 8 <meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /> 9 <link rel="start" href="index.html" title="Berkeley DB C API Reference" /> 10 <link rel="up" href="utilities.html" title="Appendix��1.�� Berkeley DB Command Line Utilities" /> 11 <link rel="prev" href="db_upgrade.html" title="db_upgrade" /> 12 <link rel="next" href="historic.html" title="Appendix��2.�� Historic Interfaces" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center">db_verify</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="db_upgrade.html">Prev</a>��</td> 22 <th width="60%" align="center">Appendix��1.�� 23 Berkeley DB Command Line Utilities 24 </th> 25 <td width="20%" align="right">��<a accesskey="n" href="historic.html">Next</a></td> 26 </tr> 27 </table> 28 <hr /> 29 </div> 30 <div class="sect1" lang="en" xml:lang="en"> 31 <div class="titlepage"> 32 <div> 33 <div> 34 <h2 class="title" style="clear: both"><a id="db_verify"></a>db_verify</h2> 35 </div> 36 </div> 37 </div> 38 <pre class="programlisting">db_verify [-NoqV] [-h home] [-P password] file ... </pre> 39 <p> 40 The <span class="command"><strong>db_verify</strong></span> utility verifies the structure of one or more files and 41 the databases they contain. 42 </p> 43 <p> 44 The options are as follows: 45 </p> 46 <div class="itemizedlist"> 47 <ul type="disc"> 48 <li> 49 <p> 50 <span class="bold"><strong>-h</strong></span> 51 </p> 52 <p> 53 Specify a home directory for the database environment; by default, the 54 current working directory is used. 55 </p> 56 </li> 57 <li> 58 <p> 59 <span class="bold"><strong>-o</strong></span> 60 </p> 61 <p> 62 Skip the database checks for btree and duplicate sort order and for 63 hashing. 64 </p> 65 <p> 66 If the file being verified contains databases with non-default 67 comparison or hashing configurations, calling the <span class="command"><strong>db_verify</strong></span> utility 68 without the <span class="bold"><strong>-o</strong></span> flag will usually 69 return failure. The <span class="bold"><strong>-o</strong></span> flag causes 70 <span class="command"><strong>db_verify</strong></span> to ignore database sort or hash ordering and allows 71 <span class="command"><strong>db_verify</strong></span> to be used on these files. To fully verify these files, 72 verify them explicitly using the <a class="xref" href="dbverify.html" title="DB->verify()">DB->verify()</a> 73 method, after configuring the correct comparison or hashing functions. 74 </p> 75 </li> 76 <li> 77 <p> 78 <span class="bold"><strong>-N</strong></span> 79 </p> 80 <p> 81 Do not acquire shared region mutexes while running. Other problems, 82 such as potentially fatal errors in Berkeley DB, will be ignored as 83 well. This option is intended only for debugging errors, and should 84 not be used under any other circumstances. 85 </p> 86 </li> 87 <li> 88 <p> 89 <span class="bold"><strong>-P</strong></span> 90 </p> 91 <p> 92 Specify an environment password. Although Berkeley DB utilities 93 overwrite password strings as soon as possible, be aware there may be 94 a window of vulnerability on systems where unprivileged users can see 95 command-line arguments or where utilities are not able to overwrite 96 the memory containing the command-line arguments. 97 </p> 98 </li> 99 <li> 100 <p> 101 <span class="bold"><strong>-q</strong></span> 102 </p> 103 <p> 104 Suppress the printing of any error descriptions, simply exit success 105 or failure. 106 </p> 107 </li> 108 <li> 109 <p> 110 <span class="bold"><strong>-V</strong></span> 111 </p> 112 <p> 113 Write the library version number to the standard output, and exit. 114 </p> 115 </li> 116 </ul> 117 </div> 118 <p> 119 <span class="bold"><strong>The <span class="command"><strong>db_verify</strong></span> utility does not perform any 120 locking, even in Berkeley DB environments that are configured with a 121 locking subsystem. As such, it should only be used on files that are 122 not being modified by another thread of control.</strong></span> 123 </p> 124 <p> 125 The <span class="command"><strong>db_verify</strong></span> utility may be used with a Berkeley DB environment (as 126 described for the <span class="bold"><strong>-h</strong></span> option, the 127 environment variable <span class="bold"><strong>DB_HOME</strong></span>, or 128 because the utility was run in a directory containing a Berkeley DB 129 environment). In order to avoid environment corruption when using a 130 Berkeley DB environment, <span class="command"><strong>db_verify</strong></span> should always be given the chance 131 to detach from the environment and exit gracefully. To cause 132 <span class="command"><strong>db_verify</strong></span> to release all environment resources and exit cleanly, send 133 it an interrupt signal (SIGINT). 134 </p> 135 <p> 136 The <span class="command"><strong>db_verify</strong></span> utility exits 0 on success, and >0 if an error 137 occurs. 138 </p> 139 <div class="sect2" lang="en" xml:lang="en"> 140 <div class="titlepage"> 141 <div> 142 <div> 143 <h3 class="title"><a id="id1716524"></a>Environment Variables</h3> 144 </div> 145 </div> 146 </div> 147 <div class="sect3" lang="en" xml:lang="en"> 148 <div class="titlepage"> 149 <div> 150 <div> 151 <h4 class="title"><a id="id1717330"></a>DB_HOME</h4> 152 </div> 153 </div> 154 </div> 155 <p> 156 If the <span class="bold"><strong>-h</strong></span> option is not specified and 157 the environment variable DB_HOME is set, it is used as the path of the 158 database home, as described in the 159 <a class="xref" href="envopen.html" title="DB_ENV->open()">DB_ENV->open()</a> 160 method. 161 </p> 162 </div> 163 </div> 164 </div> 165 <div class="navfooter"> 166 <hr /> 167 <table width="100%" summary="Navigation footer"> 168 <tr> 169 <td width="40%" align="left"><a accesskey="p" href="db_upgrade.html">Prev</a>��</td> 170 <td width="20%" align="center"> 171 <a accesskey="u" href="utilities.html">Up</a> 172 </td> 173 <td width="40%" align="right">��<a accesskey="n" href="historic.html">Next</a></td> 174 </tr> 175 <tr> 176 <td width="40%" align="left" valign="top">db_upgrade��</td> 177 <td width="20%" align="center"> 178 <a accesskey="h" href="index.html">Home</a> 179 </td> 180 <td width="40%" align="right" valign="top">��Appendix��2.�� 181 Historic Interfaces 182 </td> 183 </tr> 184 </table> 185 </div> 186 </body> 187</html> 188