mtio.h

Macros

DEFTAPE           X
MTBSF             X
MTBSR             X
MTFSF             X
MTFSR             X
MTIOCGET          X
MTIOCTOP          X
MTNOP             X
MTOFFL            X
MTREW             X
MTWEOF            X
MT_ISHT           X
MT_ISTM           X
MT_ISTS           X

struct's

mtget             X
mtop              X

   1: /*
   2:  * Structures and definitions for mag tape io control commands
   3:  */
   4: 
   5: /* mag tape io control commands */
   6: #define MTIOCTOP    (('m'<<8)|1)    /* do a mag tape op */
   7: #define MTIOCGET    (('m'<<8)|2)    /* get mag tape status */
   8: 
   9: /* structure for MTIOCTOP - mag tape op command */
  10: struct  mtop    {
  11:     short   mt_op;      /* operations defined below */
  12:     u_short mt_count;   /* how many of them */
  13: };
  14: 
  15: /* operations */
  16: #define MTWEOF  0   /* write an end-of-file record */
  17: #define MTFSF   1   /* forward space file */
  18: #define MTBSF   2   /* backward space file */
  19: #define MTFSR   3   /* forward space record */
  20: #define MTBSR   4   /* backward space record */
  21: #define MTREW   5   /* rewind */
  22: #define MTOFFL  6   /* rewind and put the drive offline */
  23: #define MTNOP   7   /* no operation, sets status only */
  24: 
  25: /* structure for MTIOCGET - mag tape get status command */
  26: 
  27: struct  mtget   {
  28:     short   mt_type;    /* type of magtape device */
  29: /* the following two registers are grossly device dependent */
  30:     u_short mt_dsreg;   /* ``drive status'' register */
  31:     short   mt_erreg;   /* ``error'' register */
  32: /* end device-dependent registers */
  33:     short   mt_resid;   /* residual count */
  34: /* the following two are not yet implemented */
  35:     daddr_t mt_fileno;  /* file number of current position */
  36:     daddr_t mt_blkno;   /* block number of current position */
  37: /* end not yet implemented */
  38: };
  39: 
  40: /*
  41:  * Constants for mt_type byte
  42:  */
  43: #define MT_ISTS     01
  44: #define MT_ISHT     02
  45: #define MT_ISTM     03
  46: 
  47: #ifndef KERNEL
  48: #define DEFTAPE "/dev/nrmt1"
  49: #endif