4.3BSD - /usr/src/sys/vax/dkio.h

   1: /*
   2:  * Copyright (c) 1982, 1986 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  *
   6:  *	@(#)dkio.h	7.1 (Berkeley) 6/5/86
   7:  */
   8: 
   9: /*
  10:  * Structures and definitions for disk io control commands
  11:  *
  12:  * THIS WHOLE AREA NEEDS MORE THOUGHT.  FOR NOW JUST IMPLEMENT
  13:  * ENOUGH TO READ AND WRITE HEADERS ON MASSBUS DISKS.  EVENTUALLY
  14:  * SHOULD BE ABLE TO DETERMINE DRIVE TYPE AND DO OTHER GOOD STUFF.
  15:  */
  16: 
  17: /* disk io control commands */
  18: #define DKIOCHDR    _IO(d, 1)   /* next I/O will read/write header */

Defined macros

Usage of this include