4.3BSD - /usr/src/sys/stand/confxx.c

   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:  *	@(#)confxx.c	7.1 (Berkeley) 6/5/86
   7:  */
   8: 
   9: #include "../machine/pte.h"
  10: 
  11: #include "../h/param.h"
  12: #include "../h/inode.h"
  13: #include "../h/fs.h"
  14: #include "saio.h"
  15: 
  16: devread(io)
  17:     register struct iob *io;
  18: {
  19:     int cc;
  20: 
  21:     io->i_flgs |= F_RDDATA;
  22:     io->i_error = 0;
  23:     cc = (*devsw[io->i_ino.i_dev].dv_strategy)(io, READ);
  24:     io->i_flgs &= ~F_TYPEMASK;
  25:     return (cc);
  26: }
  27: 
  28: devwrite(io)
  29:     register struct iob *io;
  30: {
  31:     int cc;
  32: 
  33:     io->i_flgs |= F_WRDATA;
  34:     io->i_error = 0;
  35:     cc = (*devsw[io->i_ino.i_dev].dv_strategy)(io, WRITE);
  36:     io->i_flgs &= ~F_TYPEMASK;
  37:     return (cc);
  38: }
  39: 
  40: devopen(io)
  41:     register struct iob *io;
  42: {
  43: 
  44:     (*devsw[io->i_ino.i_dev].dv_open)(io);
  45: }
  46: 
  47: devclose(io)
  48:     register struct iob *io;
  49: {
  50: 
  51:     (*devsw[io->i_ino.i_dev].dv_close)(io);
  52: }
  53: 
  54: devioctl(io, cmd, arg)
  55:     register struct iob *io;
  56:     int cmd;
  57:     caddr_t arg;
  58: {
  59: 
  60:     return ((*devsw[io->i_ino.i_dev].dv_ioctl)(io, cmd, arg));
  61: }
  62: 
  63: /*ARGSUSED*/
  64: nullsys(io)
  65:     struct iob *io;
  66: {
  67: 
  68:     ;
  69: }
  70: 
  71: /*ARGSUSED*/
  72: nullioctl(io, cmd, arg)
  73:     struct iob *io;
  74:     int cmd;
  75:     caddr_t arg;
  76: {
  77: 
  78:     return (ECMD);
  79: }
  80: 
  81: int nullsys(), nullioctl();
  82: int xxstrategy(), xxopen(), xxioctl();
  83: 
  84: struct devsw devsw[] = {
  85:     { "XX", xxstrategy, xxopen,     nullsys,    xxioctl },
  86:     { 0, 0, 0, 0, 0 }
  87: };

Defined functions

Defined variables