#include <db.h> int DB_ENV->get_ext_file_dir(DB_ENV *dbenv, const char **dirp);
The DB_ENV->get_ext_file_dir() method returns
the directory location where external file data is stored. The default
location can be set using DB_ENV->set_ext_file_dir(). Use this method only
if the database was opened in an environment. If the database
was not opened within an encompassing environment, use
DB->get_ext_file_dir() instead.
The DB_ENV->get_ext_file_dir() method always
returns 0 to indicate success.
The dirp parameter references memory into which is copied the path to the external file data directory. If DB_ENV->set_ext_file_dir() has not been called prior to calling this method, or if external files are notsupported by this environment, then this parameter is set to NULL.