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>Environment variables</title> 7 <link rel="stylesheet" href="gettingStarted.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 Programmer's Reference Guide" /> 10 <link rel="up" href="program.html" title="Chapter��14.�� Programmer Notes" /> 11 <link rel="prev" href="program_errorret.html" title="Error returns to applications" /> 12 <link rel="next" href="program_mt.html" title="Multithreaded applications" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center">Environment variables</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="program_errorret.html">Prev</a>��</td> 22 <th width="60%" align="center">Chapter��14.�� 23 Programmer Notes 24 </th> 25 <td width="20%" align="right">��<a accesskey="n" href="program_mt.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="program_environ"></a>Environment variables</h2> 35 </div> 36 </div> 37 </div> 38 <p>The Berkeley DB library uses the following environment variables:</p> 39 <div class="variablelist"> 40 <dl> 41 <dt> 42 <span class="term">DB_HOME</span> 43 </dt> 44 <dd>If the environment variable DB_HOME is set, it is used as part of 45<a class="xref" href="env_naming.html" title="File naming">File naming</a>. 46Note: For the DB_HOME variable to take effect, either the 47<a href="../api_reference/C/envopen.html#envopen_DB_USE_ENVIRON" class="olink">DB_USE_ENVIRON</a> or <a href="../api_reference/C/envopen.html#envopen_DB_USE_ENVIRON_ROOT" class="olink">DB_USE_ENVIRON_ROOT</a> flags must be 48specified to <a href="../api_reference/C/envopen.html" class="olink">DB_ENV->open()</a>.</dd> 49 <dt> 50 <span class="term">TMPDIR, TEMP, TMP, TempFolder</span> 51 </dt> 52 <dd>The TMPDIR, TEMP, TMP, and TempFolder environment variables are all 53checked as locations in which to create temporary files. See 54<a href="../api_reference/C/envset_tmp_dir.html" class="olink">DB_ENV->set_tmp_dir()</a> for more information.</dd> 55 </dl> 56 </div> 57 </div> 58 <div class="navfooter"> 59 <hr /> 60 <table width="100%" summary="Navigation footer"> 61 <tr> 62 <td width="40%" align="left"><a accesskey="p" href="program_errorret.html">Prev</a>��</td> 63 <td width="20%" align="center"> 64 <a accesskey="u" href="program.html">Up</a> 65 </td> 66 <td width="40%" align="right">��<a accesskey="n" href="program_mt.html">Next</a></td> 67 </tr> 68 <tr> 69 <td width="40%" align="left" valign="top">Error returns to applications��</td> 70 <td width="20%" align="center"> 71 <a accesskey="h" href="index.html">Home</a> 72 </td> 73 <td width="40%" align="right" valign="top">��Multithreaded applications</td> 74 </tr> 75 </table> 76 </div> 77 </body> 78</html> 79