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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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<!--$Id: db_set_msgfile.html 63573 2008-05-23 21:43:21Z trent.nelson $-->
<!--$Id: db_set_msgfile.html 63573 2008-05-23 21:43:21Z trent.nelson $-->
<!--Copyright (c) 1997,2008 Oracle. All rights reserved.-->
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<html>
<head>
<title>Berkeley DB: DB-&gt;set_msgfile</title>
<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++">
</head>
<body bgcolor=white>
<table width="100%"><tr valign=top>
<td>
<b>DB-&gt;set_msgfile</b>
</td>
<td align=right>
<a href="../api_c/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>
</tr></table>
<hr size=1 noshade>
<tt>
<b><pre>
#include &lt;db.h&gt;
<p>
void
DB-&gt;set_msgfile(DB *db, FILE *msgfile);
<p>
void
DB-&gt;get_msgfile(DB *db, FILE **msgfilep);
</pre></b>
<hr size=1 noshade>
<b>Description: DB-&gt;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_c/env_set_verbose.html">DB_ENV-&gt;set_verbose</a> and <a href="../api_c/env_stat.html">DB_ENV-&gt;stat_print</a>.</p>
<p>The <a href="../api_c/env_set_msgfile.html">DB_ENV-&gt;set_msgfile</a> and DB-&gt;set_msgfile 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_c/env_set_msgcall.html">DB_ENV-&gt;set_msgcall</a> or
<a href="../api_c/db_set_msgcall.html">DB-&gt;set_msgcall</a> methods to capture the additional error information
in a way that does not use C library FILE *'s.</p>
<p>For <a href="../api_c/db_class.html">DB</a> handles opened inside of Berkeley DB environments, calling the
DB-&gt;set_msgfile method affects the entire environment and is equivalent to calling
the <a href="../api_c/env_set_msgfile.html">DB_ENV-&gt;set_msgfile</a> method.</p>
<p>The DB-&gt;set_msgfile method configures operations performed using the specified
<a href="../api_c/db_class.html">DB</a> handle, not all operations performed on the underlying
database.</p>
<p>The DB-&gt;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: DB-&gt;get_msgfile</b>
<p>The DB-&gt;get_msgfile method returns the FILE *.</p>
<p>The DB-&gt;get_msgfile method may be called at any time during the life of the
application.</p>
<p>The DB-&gt;get_msgfile method
returns a non-zero error value on failure
and 0 on success.
</p>
<b>Parameters</b> <br>
<b>msgfilep</b><ul compact><li>The DB-&gt;get_msgfile method returns the
FILE * in <b>msgfilep</b>.</ul>
<br>
<hr size=1 noshade>
<br><b>Class</b>
<a href="../api_c/db_class.html">DB</a>
<br><b>See Also</b>
<a href="../api_c/db_list.html">Databases and Related Methods</a>
</tt>
<table width="100%"><tr><td><br></td><td align=right>
<a href="../api_c/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></tr></table>
<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font>
</body>
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