#define O_NOCTTY 00400000 /* not fcntl */
#define O_DSYNC 01000000 /* HPUX only */
#define O_RSYNC 02000000 /* HPUX only */
+#define O_NOATIME 04000000
#define FASYNC 00020000 /* fcntl, for BSD compatibility */
#define O_DIRECT 00040000 /* direct disk access hint - currently ignored */