Berkeley DB

DB→set_errcall

						#include <db.h>
						void
						DB→set_errcall(DB *,
						void (*db_errcall_fcn)(const char *errpfx, char *msg));
					

Description

When an error occurs in the Berkeley DB library, a Berkeley DB error or an error return value is returned by the function. In some cases, however, the errno value may be insufficient to completely describe the cause of the error, especially during initial application debugging.

The DB→set_errcall function 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 declared with two arguments; the first will be the prefix string (as previously set by DB→set_errpfx or ...