#include <db.h>

void
DB_ENV->set_msgfile(DB_ENV *dbenv, FILE *msgfile);  

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, DB_ENV->set_verbose() and DB_ENV->stat_print().

The DB_ENV->set_msgfile() and DB->set_msgfile() methods are used to display these messages for the application. In this case the message will include a trailing <newline> character.

Setting msgfile to NULL unconfigures the interface.

Alternatively, you can use the DB_ENV->set_msgcall() or DB->set_msgcall() methods to capture the additional error information in a way that does not use C library FILE *'s.

The DB_ENV->set_msgfile() method configures operations performed using the specified DB_ENV handle, not all operations performed on the underlying database environment.

The DB_ENV->set_msgfile() method may be called at any time during the life of the application.