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157 lines
6.3 KiB
HTML
157 lines
6.3 KiB
HTML
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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->set_msgfile()</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="db.html" title="Chapter 2. The DB Handle" />
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<link rel="prev" href="dbset_msgcall.html" title="DB->set_msgcall()" />
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<link rel="next" href="dbset_pagesize.html" title="DB->set_pagesize()" />
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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->set_msgfile()</th>
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</tr>
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<tr>
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<td width="20%" align="left"><a accesskey="p" href="dbset_msgcall.html">Prev</a> </td>
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<th width="60%" align="center">Chapter 2.
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The DB Handle
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</th>
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<td width="20%" align="right"> <a accesskey="n" href="dbset_pagesize.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="dbset_msgfile"></a>DB->set_msgfile()</h2>
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</div>
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</div>
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</div>
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<pre class="programlisting">#include <db.h>
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void
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DB->set_msgfile(DB *db, FILE *msgfile); </pre>
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<p>
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There are interfaces in the Berkeley DB library which either directly
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output informational messages or statistical information, or configure
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the library to output such messages when performing other operations,
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for example,
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<a class="xref" href="envset_verbose.html" title="DB_ENV->set_verbose()">DB_ENV->set_verbose()</a> and
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<a class="xref" href="envstat.html" title="DB_ENV->stat_print()">DB_ENV->stat_print()</a>.
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</p>
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<p>
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The <a class="xref" href="envset_msgfile.html" title="DB_ENV->set_msgfile()">DB_ENV->set_msgfile()</a> and
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<code class="methodname">DB->set_msgfile()</code> methods are used to display these messages for the
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application. In this case the message will include a trailing
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<newline> character.
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</p>
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<p>
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Setting <span class="bold"><strong>msgfile</strong></span> to NULL unconfigures
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the interface.
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</p>
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<p>
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Alternatively, you can use the
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<a class="xref" href="envset_msgcall.html" title="DB_ENV->set_msgcall()">DB_ENV->set_msgcall()</a> or
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<a class="xref" href="dbset_msgcall.html" title="DB->set_msgcall()">DB->set_msgcall()</a>
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methods to capture the additional error information in a way that does
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not use C library FILE *'s.
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</p>
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<p>
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For <a class="link" href="db.html" title="Chapter 2. The DB Handle">DB</a> handles opened
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inside of Berkeley DB environments, calling the <code class="methodname">DB->set_msgfile()</code>
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method affects the entire environment and is equivalent to calling the
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<a class="xref" href="envset_msgfile.html" title="DB_ENV->set_msgfile()">DB_ENV->set_msgfile()</a>
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method.
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</p>
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<p>
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The <code class="methodname">DB->set_msgfile()</code> method configures operations performed using
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the specified <a class="link" href="db.html" title="Chapter 2. The DB Handle">DB</a> handle,
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not all operations performed on the underlying database.
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</p>
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<p>
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The <code class="methodname">DB->set_msgfile()</code> method may be called at any time during the
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life of the application.
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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="id3870562"></a>Parameters</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="id3870904"></a>msgfile</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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The <span class="bold"><strong>msgfile</strong></span> parameter is a C library
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FILE * to be used for displaying messages.
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</p>
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</div>
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</div>
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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="id3871033"></a>Class</h3>
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</div>
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</div>
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</div>
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<p>
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<a class="link" href="db.html" title="Chapter 2. The DB Handle">DB</a>
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</p>
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</div>
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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="id3870081"></a>See Also</h3>
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</div>
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</div>
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</div>
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<p>
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<a class="xref" href="db.html#dblist" title="Database and Related Methods">Database and Related Methods</a>
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</p>
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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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|
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<tr>
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|
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<td width="40%" align="left"><a accesskey="p" href="dbset_msgcall.html">Prev</a> </td>
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<td width="20%" align="center">
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<a accesskey="u" href="db.html">Up</a>
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</td>
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<td width="40%" align="right"> <a accesskey="n" href="dbset_pagesize.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->set_msgcall() </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->set_pagesize()</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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