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Import BSDDB 4.7.25 (as of svn r89086)

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Zachary Ware
2017-09-04 13:40:25 -05:00
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<head>
<title>Berkeley DB: DbEnv::set_msgfile</title>
<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
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<td>
<b>DbEnv::set_msgfile</b>
</td>
<td align=right>
<a href="../api_cxx/api_core.html"><img src="../images/api.gif" alt="API"></a>
<a href="../ref/toc.html"><img src="../images/ref.gif" alt="Ref"></a></td>
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<tt>
<b><pre>
#include &lt;db_cxx.h&gt;
<p>
void
DbEnv::set_msgfile(FILE *msgfile);
<p>
void
DbEnv::get_msgfile(FILE **msgfilep);
</pre></b>
<hr size=1 noshade>
<b>Description: DbEnv::set_msgfile</b>
<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 href="../api_cxx/env_set_verbose.html">DbEnv::set_verbose</a> and <a href="../api_cxx/env_stat.html">DbEnv::stat_print</a>.</p>
<p>The DbEnv::set_msgfile and <a href="../api_cxx/db_set_msgfile.html">Db::set_msgfile</a> methods are used to
display these messages for the application. In this case, the message
will include a trailing &lt;newline&gt; character.</p>
<p>Setting <b>msgfile</b> to NULL unconfigures the interface.</p>
<p>Alternatively, you can use the <a href="../api_cxx/env_set_msg_stream.html">DbEnv::set_message_stream</a> and
<a href="../api_cxx/db_set_msg_stream.html">Db::set_message_stream</a> methods to display the messages via an output
stream, or the <a href="../api_cxx/env_set_msgcall.html">DbEnv::set_msgcall</a> and <a href="../api_cxx/db_set_msgcall.html">Db::set_msgcall</a> methods
to capture the additional error information in a way that does not use
either output streams or C library FILE *'s. You should not mix these
approaches.</p>
<p>The DbEnv::set_msgfile method configures operations performed using the specified
<a href="../api_cxx/env_class.html">DbEnv</a> handle, not all operations performed on the underlying
database environment.</p>
<p>The DbEnv::set_msgfile method may be called at any time during the life of the
application.</p>
<b>Parameters</b> <br>
<b>msgfile</b><ul compact><li>The <b>msgfile</b> parameter is a C library FILE * to be used for
displaying messages.</ul>
<br>
<hr size=1 noshade>
<b>Description: DbEnv::get_msgfile</b>
<p>The DbEnv::get_msgfile method returns the FILE *.</p>
<p>The DbEnv::get_msgfile method may be called at any time during the life of the
application.</p>
<p>The DbEnv::get_msgfile method
either returns a non-zero error value
or throws an exception that encapsulates a non-zero error value on
failure, and returns 0 on success.
</p>
<b>Parameters</b> <br>
<b>msgfilep</b><ul compact><li>The DbEnv::get_msgfile method returns the
FILE * in <b>msgfilep</b>.</ul>
<br>
<hr size=1 noshade>
<br><b>Class</b>
<a href="../api_cxx/env_class.html">DbEnv</a>
<br><b>See Also</b>
<a href="../api_cxx/env_list.html">Database Environments and Related Methods</a>
</tt>
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<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font>
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