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Berkeley DB: DbEnv::set_errfile
DbEnv::set_errfile
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#include <db_cxx.h>
void
DbEnv::set_errfile(FILE *errfile);
void
DbEnv::get_errfile(FILE **errfilep);
Description: DbEnv::set_errfile
When an error occurs in the Berkeley DB library, an exception is thrown or an
error return value is returned by the interface. In some cases,
however, the errno value may be insufficient to completely
describe the cause of the error, especially during initial application
debugging.
The DbEnv::set_errcall and Db::set_errcall methods are used to
enhance the mechanism for reporting error messages to the application
by setting a C library FILE * to be used for displaying additional Berkeley DB
error messages. In some cases, when an error occurs, Berkeley DB will output
an additional error message to the specified file reference.
Alternatively, you can use the DbEnv::set_error_stream method to display
the additional information via an output stream, or the
DbEnv::set_errcall method 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.
The error message will consist of the prefix string and a colon
(":") (if a prefix string was previously specified using
Db::set_errpfx or DbEnv::set_errpfx), an error string, and
a trailing <newline> character.
Setting errfile to NULL unconfigures the interface.
This error logging enhancement does not slow performance or significantly
increase application size, and may be run during normal operation as well
as during application debugging.
The DbEnv::set_errfile method may be called at any time during the life of the
application.
Parameters
- errfile
- The errfile parameter is a C library FILE * to be used for
displaying additional Berkeley DB error information.
Description: DbEnv::get_errfile
The DbEnv::get_errfile method returns the .
The DbEnv::get_errfile method may be called at any time during the life of the
application.
Class
DbEnv
See Also
Database Environments and Related Methods
Copyright (c) 1996-2004 Sleepycat Software, Inc. - All rights reserved.
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