#define DEVNULL_MODE_L 0x00000800
#define DEVNULL_MODE_M 0x00001000
#define DEVNULL_MODE_N 0x00002000
+#define DEVNULL_MODE_OPME 0x00004000
-#define DEVNULL_MODES "abcdefghijklmn"
+#define DEVNULL_MODES "abcdefghijklmno"
#define DEVNULL_FLAGGED(hi, tok) ((hi)->modes & DEVNULL_##tok)
#define DEVNULL_SET_FLAG(hi, tok) ((hi)->modes |= DEVNULL_##tok)