Berkeley DB

DbEnv::set_errcall

						#include <db_cxx.h>
						void DbEnv::set_errcall(
						void (*db_errcall_fcn)(const char *errpfx, char *msg));
					

Description

When an error occurs in the Berkeley DB library, an exception is thrown or an error return value is returned by the method. 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 method is used to enhance the mechanism for reporting error messages to the application. In some cases when an error occurs, Berkeley DB will call db_errcall_fcn with additional error information. The function must be defined with two arguments; the first will be the prefix string (as previously set by Db::set_errpfx ...