#include <db.h> int DB->get_blob_dir(DB *dbenv, const char **dirp);
         The DB->get_blob_dir() method returns
         the directory location where blob data is stored. The default
         location can be set using DB->set_blob_dir(). Use this method only
         if the database was not opened in an environment. If the database
         was opened within an encompassing environment, use 
         DB_ENV->get_blob_dir() instead.
    
         The DB->get_blob_dir() method always
         returns 0 to indicate success.