bsd/sys/disktab.h

   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_ */