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

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /*
        !            26:  * HISTORY:
        !            27:  * 16-Mar-88  John Seamons (jks) at NeXT
        !            28:  *     Cleaned up to support standard disk label definitions.
        !            29:  *
        !            30:  * 24-Feb-88  Mike DeMoney (mike) at NeXT
        !            31:  *     Added d_boot0_blkno to indicate logical block number
        !            32:  *     of "block 0" boot.  This blkno is in d_secsize sectors.
        !            33:  *     Added d_bootfile to indicate the default operating system
        !            34:  *     image to be booted by the blk 0 boot.
        !            35:  *     Changed d_name and d_type to be char arrays rather than ptrs
        !            36:  *     so they are part of label.  This limits length of info in
        !            37:  *     /etc/disktab, sorry.
        !            38:  */
        !            39: 
        !            40: #ifndef        _SYS_DISKTAB_
        !            41: #define _SYS_DISKTAB_
        !            42: 
        !            43: /*
        !            44:  * Disk description table, see disktab(5)
        !            45:  */
        !            46: #ifndef _KERNEL
        !            47: #define        DISKTAB         "/etc/disktab"
        !            48: #endif /* !_KERNEL */
        !            49: 
        !            50: #define        MAXDNMLEN       24      // drive name length
        !            51: #define        MAXMPTLEN       16      // mount point length
        !            52: #define        MAXFSTLEN       8       // file system type length
        !            53: #define        MAXTYPLEN       24      // drive type length
        !            54: #define        NBOOTS          2       // # of boot blocks
        !            55: #define        MAXBFLEN        24      // bootfile name length
        !            56: #define        MAXHNLEN        32      // host name length
        !            57: #define        NPART           8       // # of partitions
        !            58: 
        !            59: typedef struct partition {
        !            60:        int     p_base;         /* base sector# of partition */
        !            61:        int     p_size;         /* #sectors in partition */
        !            62:        short   p_bsize;        /* block size in bytes */
        !            63:        short   p_fsize;        /* frag size in bytes */
        !            64:        char    p_opt;          /* 's'pace/'t'ime optimization pref */
        !            65:        short   p_cpg;          /* cylinders per group */
        !            66:        short   p_density;      /* bytes per inode density */
        !            67:        char    p_minfree;      /* minfree (%) */
        !            68:        char    p_newfs;        /* run newfs during init */
        !            69:        char    p_mountpt[MAXMPTLEN];/* mount point */
        !            70:        char    p_automnt;      /* auto-mount when inserted */
        !            71:        char    p_type[MAXFSTLEN];/* file system type */
        !            72: } partition_t;
        !            73: 
        !            74: typedef struct disktab {
        !            75:        char    d_name[MAXDNMLEN];      /* drive name */
        !            76:        char    d_type[MAXTYPLEN];      /* drive type */
        !            77:        int     d_secsize;              /* sector size in bytes */
        !            78:        int     d_ntracks;              /* # tracks/cylinder */
        !            79:        int     d_nsectors;             /* # sectors/track */
        !            80:        int     d_ncylinders;           /* # cylinders */
        !            81:        int     d_rpm;                  /* revolutions/minute */
        !            82:        short   d_front;                /* size of front porch (sectors) */
        !            83:        short   d_back;                 /* size of back porch (sectors) */
        !            84:        short   d_ngroups;              /* number of alt groups */
        !            85:        short   d_ag_size;              /* alt group size (sectors) */
        !            86:        short   d_ag_alts;              /* alternate sectors / alt group */
        !            87:        short   d_ag_off;               /* sector offset to first alternate */
        !            88:        int     d_boot0_blkno[NBOOTS];  /* "blk 0" boot locations */
        !            89:        char    d_bootfile[MAXBFLEN];   /* default bootfile */
        !            90:        char    d_hostname[MAXHNLEN];   /* host name */
        !            91:        char    d_rootpartition;        /* root partition e.g. 'a' */
        !            92:        char    d_rwpartition;          /* r/w partition e.g. 'b' */
        !            93:        partition_t d_partitions[NPART];
        !            94: } disktab_t;
        !            95: 
        !            96: #ifndef _KERNEL
        !            97: struct disktab *getdiskbyname(), *getdiskbydev();
        !            98: #endif /* !_KERNEL */
        !            99: 
        !           100: #endif /* _SYS_DISKTAB_ */

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