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<h2 class="title" style="clear: both"><a id="dbset_msgfile"></a>Db::set_msgfile()</h2>
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<pre class="programlisting">#include <db_cxx.h>
void Db::set_msgfile(FILE *msgfile); </pre>
<p>
There are interfaces in the Berkeley DB library which either directly
output informational messages or statistical information, or configure
the library to output such messages when performing other operations,
for example,
<a class="xref" href="envset_verbose.html" title="DbEnv::set_verbose()">DbEnv::set_verbose()</a> and
<a class="xref" href="envstat.html" title="DbEnv::stat_print()">DbEnv::stat_print()</a>.
</p>
<p>
The <a class="xref" href="envset_msgfile.html" title="DbEnv::set_msgfile()">DbEnv::set_msgfile()</a> and
<code class="methodname">Db::set_msgfile()</code> methods are used to display these messages for the
application. In this case the message will include a trailing
<newline> character.
</p>
<p>
Setting <span class="bold"><strong>msgfile</strong></span> to NULL unconfigures
the interface.
</p>
<p>
Alternatively, you can use the
<span>
<a class="xref" href="envset_message_stream.html" title="DbEnv::set_message_stream()">DbEnv::set_message_stream()</a>
and
<a class="xref" href="dbset_message_stream.html" title="Db::set_message_stream()">Db::set_message_stream()</a>
methods to display the messages via an output stream, or the
</span>
<a class="xref" href="envset_msgcall.html" title="DbEnv::set_msgcall()">DbEnv::set_msgcall()</a> or
<a class="xref" href="dbset_msgcall.html" title="Db::set_msgcall()">Db::set_msgcall()</a>
methods to capture the additional error information in a way that does
not use C library FILE *'s.
<span>You should not mix these approaches.</span>
</p>
<p>
For <a class="link" href="db.html" title="Chapter 2. The Db Handle">Db</a> handles opened
inside of Berkeley DB environments, calling the <code class="methodname">Db::set_msgfile()</code>
method affects the entire environment and is equivalent to calling the
<a class="xref" href="envset_msgfile.html" title="DbEnv::set_msgfile()">DbEnv::set_msgfile()</a>
method.
</p>
<p>
The <code class="methodname">Db::set_msgfile()</code> method configures operations performed using
the specified <a class="link" href="db.html" title="Chapter 2. The Db Handle">Db</a> handle,
not all operations performed on the underlying database.
</p>
<p>
The <code class="methodname">Db::set_msgfile()</code> method may be called at any time during the
life of the application.
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<h3 class="title"><a id="id1649611"></a>Parameters</h3>
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<h4 class="title"><a id="id1649743"></a>msgfile</h4>
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<p>
The <span class="bold"><strong>msgfile</strong></span> parameter is a C library
FILE * to be used for displaying messages.
</p>
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<div class="sect2" lang="en" xml:lang="en">
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<h3 class="title"><a id="id1649736"></a>Class</h3>
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<a class="link" href="db.html" title="Chapter 2. The Db Handle">Db</a>
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<h3 class="title"><a id="id1649741"></a>See Also</h3>
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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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