#include <db.h> int DB_MPOOLFILE->get_lsn_offset(DB_MPOOLFILE *mpf, int32_t *lsn_offsetp);
         The DB_MPOOLFILE->get_lsn_offset() method returns the log sequence
         number byte offset configured for a file's pages using the
         DB_MPOOLFILE->set_lsn_offset()
         method.
    
         The DB_MPOOLFILE->get_lsn_offset() method may be called at any time
         during the life of the application.
    
         The DB_MPOOLFILE->get_lsn_offset() 
            
                  method returns a non-zero error value on failure and 0 on success.