#define O_FSYNC O_SYNC
#define O_ASYNC 0x1000
-#ifdef __USE_GNU
+#ifdef __USE_LARGEFILE64
# define O_LARGEFILE 0x2000 /* Allow large file opens. */
+#endif
+
+#ifdef __USE_GNU
# define O_NOFOLLOW 0x4000 /* Do not follow links. */
# define O_DIRECT 0x8000 /* Direct disk access hint. */
# define O_DIRECTORY 0x10000 /* Must be a directory. */
#define O_NDELAY O_NONBLOCK
+/* For now Linux has no synchronisity options for data and read
+ operations. We define the symbols here but let them do the same as
+ O_SYNC since this is a superset. */
+#if defined __USE_POSIX199309 || defined __USE_UNIX98
+# define O_DSYNC O_SYNC /* Synchronize data. */
+# define O_RSYNC O_SYNC /* Synchronize read operations. */
+#endif
+
/* Values for the second argument to `fcntl'. */
#define F_DUPFD 0 /* Duplicate file descriptor. */
#define F_GETFD 1 /* Get file descriptor flags. */