saio.h

Variables

b                 X
devsw             X
iob               X
segflag           X

Macros

F_ALLOC           X
F_FILE            X
F_READ            X
F_WRITE           X
NBUFS             X
NFILES            X
READ              X
WRITE             X

struct's

devsw             X
iob               X

   1: /*
   2:  * header file for standalone package
   3:  */
   4: 
   5: /*
   6:  * io block: includes an
   7:  * inode, cells for the use of seek, etc,
   8:  * and a buffer.
   9:  */
  10: struct  iob {
  11:     char    i_flgs;
  12:     struct  inode   i_ino;
  13:     int i_unit;
  14:     daddr_t i_boff;
  15:     daddr_t i_cyloff;
  16:     off_t   i_offset;
  17:     daddr_t i_bn;
  18:     char    *i_ma;
  19:     int i_cc;
  20: #ifndef UCB_NKB
  21:     char    i_buf[512];
  22: #else
  23:     char    i_buf[BSIZE];
  24: #endif
  25: };
  26: 
  27: #define F_READ  01
  28: #define F_WRITE 02
  29: #define F_ALLOC 04
  30: #define F_FILE  010
  31: #define READ    F_READ
  32: #define WRITE   F_WRITE
  33: 
  34: /*
  35:  * device switch
  36:  */
  37: struct  devsw {
  38:     char    *dv_name;
  39:     int (*dv_strategy)();
  40:     int (*dv_open)();
  41:     int (*dv_close)();
  42: };
  43: 
  44: struct  devsw   devsw[];
  45: 
  46: #define NBUFS   4
  47: 
  48: 
  49: #ifndef UCB_NKB
  50: char    b[NBUFS][512];
  51: #else
  52: char    b[NBUFS][BSIZE];
  53: #endif
  54: daddr_t blknos[NBUFS];
  55: 
  56: #define NFILES  4
  57: struct  iob iob[NFILES];
  58: 
  59: /*
  60:  * Set to which 64Kb segment the code is physically running in.
  61:  * Must be set by the user's main (or thereabouts).
  62:  */
  63: int segflag;