+/* Routine flags. */
+#define R_CURSOR 1 /* del, put, seq */
+#define __R_UNUSED 2 /* UNUSED */
+#define R_FIRST 3 /* seq */
+#define R_IAFTER 4 /* put (RECNO) */
+#define R_IBEFORE 5 /* put (RECNO) */
+#define R_LAST 6 /* seq (BTREE, RECNO) */
+#define R_NEXT 7 /* seq */
+#define R_NOOVERWRITE 8 /* put */
+#define R_PREV 9 /* seq (BTREE, RECNO) */
+#define R_SETCURSOR 10 /* put (RECNO) */
+#define R_RECNOSYNC 11 /* sync (RECNO) */
+
+typedef enum { DB_BTREE, DB_HASH, DB_RECNO } DBTYPE;
+
+/*
+ * !!!
+ * The following flags are included in the dbopen(3) call as part of the
+ * open(2) flags. In order to avoid conflicts with the open flags, start
+ * at the top of the 16 or 32-bit number space and work our way down. If
+ * the open flags were significantly expanded in the future, it could be
+ * a problem. Wish I'd left another flags word in the dbopen call.
+ *
+ * !!!
+ * None of this stuff is implemented yet. The only reason that it's here
+ * is so that the access methods can skip copying the key/data pair when
+ * the DB_LOCK flag isn't set.
+ */
+#if UINT_MAX > 65535
+#define DB_LOCK 0x20000000 /* Do locking. */
+#define DB_SHMEM 0x40000000 /* Use shared memory. */
+#define DB_TXN 0x80000000 /* Do transactions. */
+#else
+#define DB_LOCK 0x00002000 /* Do locking. */
+#define DB_SHMEM 0x00004000 /* Use shared memory. */
+#define DB_TXN 0x00008000 /* Do transactions. */
+#endif
+
+/* Access method description structure. */