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<!--$Id: env_set_msgfile.so,v 10.7 2006/02/10 22:54:59 bostic Exp $--> <!--Copyright (c) 1997,2008 Oracle. All rights reserved.--> <!--See the file LICENSE for redistribution information.--> <html> <head> <title>Berkeley DB: DbEnv::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>DbEnv::set_msgfile</b> </td> <td align=right> <a href="../../db4-devel-4.7.25/api_cxx/api_core.html"><img src="../../db4-devel-4.7.25/images/api.gif" alt="API"></a> <a href="../../db4-devel-4.7.25/ref/toc.html"><img src="../../db4-devel-4.7.25/images/ref.gif" alt="Ref"></a></td> </tr></table> <hr size=1 noshade> <tt> <b><pre> #include <db_cxx.h> <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="../../db4-devel-4.7.25/api_cxx/env_set_verbose.html">DbEnv::set_verbose</a> and <a href="../../db4-devel-4.7.25/api_cxx/env_stat.html">DbEnv::stat_print</a>.</p> <p>The DbEnv::set_msgfile and <a href="../../db4-devel-4.7.25/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 <newline> character.</p> <p>Setting <b>msgfile</b> to NULL unconfigures the interface.</p> <p>Alternatively, you can use the <a href="../../db4-devel-4.7.25/api_cxx/env_set_msg_stream.html">DbEnv::set_message_stream</a> and <a href="../../db4-devel-4.7.25/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="../../db4-devel-4.7.25/api_cxx/env_set_msgcall.html">DbEnv::set_msgcall</a> and <a href="../../db4-devel-4.7.25/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="../../db4-devel-4.7.25/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="../../db4-devel-4.7.25/api_cxx/env_class.html">DbEnv</a> <br><b>See Also</b> <a href="../../db4-devel-4.7.25/api_cxx/env_list.html">Database Environments and Related Methods</a> </tt> <table width="100%"><tr><td><br></td><td align=right> <a href="../../db4-devel-4.7.25/api_cxx/api_core.html"><img src="../../db4-devel-4.7.25/images/api.gif" alt="API"></a><a href="../../db4-devel-4.7.25/ref/toc.html"><img src="../../db4-devel-4.7.25/images/ref.gif" alt="Ref"></a> </td></tr></table> <p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> </body> </html>
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