source: trunk/minix/include/sys/mtio.h@ 19

/* <sys/mtio.h> magnetic tape commands                  Author: Kees J. Bot
 */

#ifndef _SYS__MTIO_H
#define _SYS__MTIO_H

/* Tape operations: ioctl(fd, MTIOCTOP, &struct mtop) */

struct mtop {
        short   mt_op;          /* Operation (MTWEOF, etc.) */
        int     mt_count;       /* Repeat count. */
};

#define MTWEOF   0      /* Write End-Of-File Marker */
#define MTFSF    1      /* Forward Space File mark */
#define MTBSF    2      /* Backward Space File mark */
#define MTFSR    3      /* Forward Space Record */
#define MTBSR    4      /* Backward Space Record */
#define MTREW    5      /* Rewind tape */
#define MTOFFL   6      /* Rewind and take Offline */
#define MTNOP    7      /* No-Operation, set status only */
#define MTRETEN  8      /* Retension (completely wind and rewind) */
#define MTERASE  9      /* Erase the tape and rewind */
#define MTEOM   10      /* Position at End-Of-Media */
#define MTMODE  11      /* Select tape density */
#define MTBLKZ  12      /* Select tape block size */

/* Tape status: ioctl(fd, MTIOCGET, &struct mtget) */

struct mtget {
        short   mt_type;        /* Type of tape device. */

        /* Device dependent "registers". */
        short   mt_dsreg;       /* Drive status register. */
        short   mt_erreg;       /* Error register. */
        short   dummy;          /* (alignment) */

        /* Misc info. */
        off_t   mt_resid;       /* Residual count. */
        off_t   mt_fileno;      /* Current File Number. */
        off_t   mt_blkno;       /* Current Block Number within file. */
        off_t   mt_blksize;     /* Current block size. */
};

#endif /* _SYS__MTIO_H */