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Annotation of XNU/bsd/sys/disktab.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * HISTORY:
        !            24:  * 16-Mar-88  John Seamons (jks) at NeXT
        !            25:  *     Cleaned up to support standard disk label definitions.
        !            26:  *
        !            27:  * 24-Feb-88  Mike DeMoney (mike) at NeXT
        !            28:  *     Added d_boot0_blkno to indicate logical block number
        !            29:  *     of "block 0" boot.  This blkno is in d_secsize sectors.
        !            30:  *     Added d_bootfile to indicate the default operating system
        !            31:  *     image to be booted by the blk 0 boot.
        !            32:  *     Changed d_name and d_type to be char arrays rather than ptrs
        !            33:  *     so they are part of label.  This limits length of info in
        !            34:  *     /etc/disktab, sorry.
        !            35:  */
        !            36: 
        !            37: #ifndef        _SYS_DISKTAB_
        !            38: #define _SYS_DISKTAB_
        !            39: 
        !            40: /*
        !            41:  * Disk description table, see disktab(5)
        !            42:  */
        !            43: #ifndef KERNEL
        !            44: #define        DISKTAB         "/etc/disktab"
        !            45: #endif /* !KERNEL */
        !            46: 
        !            47: #define        MAXDNMLEN       24      // drive name length
        !            48: #define        MAXMPTLEN       16      // mount point length
        !            49: #define        MAXFSTLEN       8       // file system type length
        !            50: #define        MAXTYPLEN       24      // drive type length
        !            51: #define        NBOOTS          2       // # of boot blocks
        !            52: #define        MAXBFLEN        24      // bootfile name length
        !            53: #define        MAXHNLEN        32      // host name length
        !            54: #define        NPART           8       // # of partitions
        !            55: 
        !            56: typedef struct partition {
        !            57:        int     p_base;         /* base sector# of partition */
        !            58:        int     p_size;         /* #sectors in partition */
        !            59:        short   p_bsize;        /* block size in bytes */
        !            60:        short   p_fsize;        /* frag size in bytes */
        !            61:        char    p_opt;          /* 's'pace/'t'ime optimization pref */
        !            62:        short   p_cpg;          /* cylinders per group */
        !            63:        short   p_density;      /* bytes per inode density */
        !            64:        char    p_minfree;      /* minfree (%) */
        !            65:        char    p_newfs;        /* run newfs during init */
        !            66:        char    p_mountpt[MAXMPTLEN];/* mount point */
        !            67:        char    p_automnt;      /* auto-mount when inserted */
        !            68:        char    p_type[MAXFSTLEN];/* file system type */
        !            69: } partition_t;
        !            70: 
        !            71: typedef struct disktab {
        !            72:        char    d_name[MAXDNMLEN];      /* drive name */
        !            73:        char    d_type[MAXTYPLEN];      /* drive type */
        !            74:        int     d_secsize;              /* sector size in bytes */
        !            75:        int     d_ntracks;              /* # tracks/cylinder */
        !            76:        int     d_nsectors;             /* # sectors/track */
        !            77:        int     d_ncylinders;           /* # cylinders */
        !            78:        int     d_rpm;                  /* revolutions/minute */
        !            79:        short   d_front;                /* size of front porch (sectors) */
        !            80:        short   d_back;                 /* size of back porch (sectors) */
        !            81:        short   d_ngroups;              /* number of alt groups */
        !            82:        short   d_ag_size;              /* alt group size (sectors) */
        !            83:        short   d_ag_alts;              /* alternate sectors / alt group */
        !            84:        short   d_ag_off;               /* sector offset to first alternate */
        !            85:        int     d_boot0_blkno[NBOOTS];  /* "blk 0" boot locations */
        !            86:        char    d_bootfile[MAXBFLEN];   /* default bootfile */
        !            87:        char    d_hostname[MAXHNLEN];   /* host name */
        !            88:        char    d_rootpartition;        /* root partition e.g. 'a' */
        !            89:        char    d_rwpartition;          /* r/w partition e.g. 'b' */
        !            90:        partition_t d_partitions[NPART];
        !            91: } disktab_t;
        !            92: 
        !            93: #ifndef KERNEL
        !            94: struct disktab *getdiskbyname(), *getdiskbydev();
        !            95: #endif /* !KERNEL */
        !            96: 
        !            97: #endif /* _SYS_DISKTAB_ */

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