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<h2 class="title" style="clear: both"><a id="envset_msgfile"></a>DbEnv::set_msgfile()</h2>
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<pre class="programlisting">#include <db_cxx.h>
void
DbEnv::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>.
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<p>
The <code class="methodname">DbEnv::set_msgfile()</code> and
<a class="xref" href="dbset_msgfile.html" title="Db::set_msgfile()">Db::set_msgfile()</a> 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.
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<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>
The <code class="methodname">DbEnv::set_msgfile()</code> method configures operations performed
using the specified <a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a> handle, not all
operations performed on the underlying database environment.
</p>
<p>
The <code class="methodname">DbEnv::set_msgfile()</code> method may be called at any time during the
life of the application.
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<h4 class="title"><a id="idp7584368"></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.
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<a class="link" href="env.html" title="Chapter 5. The DbEnv Handle">DbEnv</a>
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<a class="xref" href="env.html#envlist" title="Database Environments and Related Methods">Database Environments and Related Methods</a>
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