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Annotation of 43BSD/sys/h/mtio.h, revision 1.1

1.1     ! root        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:  *     @(#)mtio.h      7.1 (Berkeley) 6/4/86
        !             7:  */
        !             8: 
        !             9: /*
        !            10:  * Structures and definitions for mag tape io control commands
        !            11:  */
        !            12: 
        !            13: /* structure for MTIOCTOP - mag tape op command */
        !            14: struct mtop    {
        !            15:        short   mt_op;          /* operations defined below */
        !            16:        daddr_t mt_count;       /* how many of them */
        !            17: };
        !            18: 
        !            19: /* operations */
        !            20: #define MTWEOF 0       /* write an end-of-file record */
        !            21: #define MTFSF  1       /* forward space file */
        !            22: #define MTBSF  2       /* backward space file */
        !            23: #define MTFSR  3       /* forward space record */
        !            24: #define MTBSR  4       /* backward space record */
        !            25: #define MTREW  5       /* rewind */
        !            26: #define MTOFFL 6       /* rewind and put the drive offline */
        !            27: #define MTNOP  7       /* no operation, sets status only */
        !            28: #define MTCACHE        8       /* enable controller cache */
        !            29: #define MTNOCACHE 9    /* disable controller cache */
        !            30: 
        !            31: /* structure for MTIOCGET - mag tape get status command */
        !            32: 
        !            33: struct mtget   {
        !            34:        short   mt_type;        /* type of magtape device */
        !            35: /* the following two registers are grossly device dependent */
        !            36:        short   mt_dsreg;       /* ``drive status'' register */
        !            37:        short   mt_erreg;       /* ``error'' register */
        !            38: /* end device-dependent registers */
        !            39:        short   mt_resid;       /* residual count */
        !            40: /* the following two are not yet implemented */
        !            41:        daddr_t mt_fileno;      /* file number of current position */
        !            42:        daddr_t mt_blkno;       /* block number of current position */
        !            43: /* end not yet implemented */
        !            44: };
        !            45: 
        !            46: /*
        !            47:  * Constants for mt_type byte.  These are the same
        !            48:  * for controllers compatible with the types listed.
        !            49:  */
        !            50: #define        MT_ISTS         0x01            /* TS-11 */
        !            51: #define        MT_ISHT         0x02            /* TM03 Massbus: TE16, TU45, TU77 */
        !            52: #define        MT_ISTM         0x03            /* TM11/TE10 Unibus */
        !            53: #define        MT_ISMT         0x04            /* TM78/TU78 Massbus */
        !            54: #define        MT_ISUT         0x05            /* SI TU-45 emulation on Unibus */
        !            55: #define        MT_ISCPC        0x06            /* SUN */
        !            56: #define        MT_ISAR         0x07            /* SUN */
        !            57: #define        MT_ISTMSCP      0x08            /* DEC TMSCP protocol (TU81, TK50) */
        !            58: 
        !            59: /* mag tape io control commands */
        !            60: #define        MTIOCTOP        _IOW(m, 1, struct mtop)         /* do a mag tape op */
        !            61: #define        MTIOCGET        _IOR(m, 2, struct mtget)        /* get tape status */
        !            62: #define MTIOCIEOT      _IO(m, 3)                       /* ignore EOT error */
        !            63: #define MTIOCEEOT      _IO(m, 4)                       /* enable EOT error */
        !            64: 
        !            65: #ifndef KERNEL
        !            66: #define        DEFTAPE "/dev/rmt12"
        !            67: #endif

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