DBTYPE
DB *dbopen(const char *, int, mode_t, DBTYPE, const void *);
DBTYPE type; /* Underlying db type. */
dbopen(const char *fname, int flags, mode_t mode, DBTYPE type, const void *openinfo)
DBTYPE dbtype(char *);
DBTYPE
setinfo(DBTYPE type, char *s)
void *setinfo(DBTYPE, char *);
DBTYPE type; /* Database type. */