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_ENV->set_msgfile()</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="env.html" title="Chapter��5.�� The DB_ENV Handle" /> 11 <link rel="prev" href="envset_msgcall.html" title="DB_ENV->set_msgcall()" /> 12 <link rel="next" href="envset_shm_key.html" title="DB_ENV->set_shm_key()" /> 13 </head> 14 <body> 15 <div class="navheader"> 16 <table width="100%" summary="Navigation header"> 17 <tr> 18 <th colspan="3" align="center">DB_ENV->set_msgfile()</th> 19 </tr> 20 <tr> 21 <td width="20%" align="left"><a accesskey="p" href="envset_msgcall.html">Prev</a>��</td> 22 <th width="60%" align="center">Chapter��5.�� 23 The DB_ENV Handle 24 </th> 25 <td width="20%" align="right">��<a accesskey="n" href="envset_shm_key.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="envset_msgfile"></a>DB_ENV->set_msgfile()</h2> 35 </div> 36 </div> 37 </div> 38 <pre class="programlisting">#include <db.h> 39 40void 41DB_ENV->set_msgfile(DB_ENV *dbenv, FILE *msgfile); </pre> 42 <p> 43 There are interfaces in the Berkeley DB library which either directly 44 output informational messages or statistical information, or configure 45 the library to output such messages when performing other operations, 46 for example, <a class="xref" href="envset_verbose.html" title="DB_ENV->set_verbose()">DB_ENV->set_verbose()</a> and 47 <a class="xref" href="envstat.html" title="DB_ENV->stat_print()">DB_ENV->stat_print()</a>. 48 </p> 49 <p> 50 The <code class="methodname">DB_ENV->set_msgfile()</code> and 51 <a class="xref" href="dbset_msgfile.html" title="DB->set_msgfile()">DB->set_msgfile()</a> methods 52 are used to display these messages for the application. In this case 53 the message will include a trailing <newline> character. 54 </p> 55 <p> 56 Setting <span class="bold"><strong>msgfile</strong></span> to NULL unconfigures 57 the interface. 58 </p> 59 <p> 60 Alternatively, you can use the 61 62 63 <a class="xref" href="envset_msgcall.html" title="DB_ENV->set_msgcall()">DB_ENV->set_msgcall()</a> or 64 <a class="xref" href="dbset_msgcall.html" title="DB->set_msgcall()">DB->set_msgcall()</a> 65 methods to capture the additional error information in a way that does 66 not use C library FILE *'s. 67 68 </p> 69 <p> 70 The <code class="methodname">DB_ENV->set_msgfile()</code> method configures operations performed 71 using the specified <a class="link" href="env.html" title="Chapter��5.�� The DB_ENV Handle">DB_ENV</a> handle, not all 72 operations performed on the underlying database environment. 73 </p> 74 <p> 75 The <code class="methodname">DB_ENV->set_msgfile()</code> method may be called at any time during the 76 life of the application. 77 </p> 78 <div class="sect2" lang="en" xml:lang="en"> 79 <div class="titlepage"> 80 <div> 81 <div> 82 <h3 class="title"><a id="id1671163"></a>Parameters</h3> 83 </div> 84 </div> 85 </div> 86 <div class="sect3" lang="en" xml:lang="en"> 87 <div class="titlepage"> 88 <div> 89 <div> 90 <h4 class="title"><a id="id1671311"></a>msgfile</h4> 91 </div> 92 </div> 93 </div> 94 <p> 95 The <span class="bold"><strong>msgfile</strong></span> parameter is a C library 96 FILE * to be used for displaying messages. 97 </p> 98 </div> 99 </div> 100 <div class="sect2" lang="en" xml:lang="en"> 101 <div class="titlepage"> 102 <div> 103 <div> 104 <h3 class="title"><a id="id1671585"></a>Class</h3> 105 </div> 106 </div> 107 </div> 108 <p> 109 <a class="link" href="env.html" title="Chapter��5.�� The DB_ENV Handle">DB_ENV</a> 110 </p> 111 </div> 112 <div class="sect2" lang="en" xml:lang="en"> 113 <div class="titlepage"> 114 <div> 115 <div> 116 <h3 class="title"><a id="id1671477"></a>See Also</h3> 117 </div> 118 </div> 119 </div> 120 <p> 121 <a class="xref" href="env.html#envlist" title="Database Environments and Related Methods">Database Environments and Related Methods</a> 122 </p> 123 </div> 124 </div> 125 <div class="navfooter"> 126 <hr /> 127 <table width="100%" summary="Navigation footer"> 128 <tr> 129 <td width="40%" align="left"><a accesskey="p" href="envset_msgcall.html">Prev</a>��</td> 130 <td width="20%" align="center"> 131 <a accesskey="u" href="env.html">Up</a> 132 </td> 133 <td width="40%" align="right">��<a accesskey="n" href="envset_shm_key.html">Next</a></td> 134 </tr> 135 <tr> 136 <td width="40%" align="left" valign="top">DB_ENV->set_msgcall()��</td> 137 <td width="20%" align="center"> 138 <a accesskey="h" href="index.html">Home</a> 139 </td> 140 <td width="40%" align="right" valign="top">��DB_ENV->set_shm_key()</td> 141 </tr> 142 </table> 143 </div> 144 </body> 145</html> 146