bsd/sys/disktab.h

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * HISTORY:
  32  * 16-Mar-88  John Seamons (jks) at NeXT
  33  *      Cleaned up to support standard disk label definitions.
  34  *
  35  * 24-Feb-88  Mike DeMoney (mike) at NeXT
  36  *      Added d_boot0_blkno to indicate logical block number
  37  *      of "block 0" boot.  This blkno is in d_secsize sectors.
  38  *      Added d_bootfile to indicate the default operating system
  39  *      image to be booted by the blk 0 boot.
  40  *      Changed d_name and d_type to be char arrays rather than ptrs
  41  *      so they are part of label.  This limits length of info in
  42  *      /etc/disktab, sorry.
  43  */
  44
  45 #ifndef _SYS_DISKTAB_
  46 #define _SYS_DISKTAB_
  47
  48 #include <sys/appleapiopts.h>
  49
  50 #ifdef  __APPLE_API_OBSOLETE
  51
  52 /*
  53  * Disk description table, see disktab(5)
  54  */
  55 #ifndef KERNEL
  56 #define DISKTAB         "/etc/disktab"
  57 #endif  /* !KERNEL */
  58
  59 #define MAXDNMLEN       24      // drive name length
  60 #define MAXMPTLEN       16      // mount point length
  61 #define MAXFSTLEN       8       // file system type length
  62 #define MAXTYPLEN       24      // drive type length
  63 #define NBOOTS          2       // # of boot blocks
  64 #define MAXBFLEN        24      // bootfile name length
  65 #define MAXHNLEN        32      // host name length
  66 #define NPART           8       // # of partitions
  67
  68 typedef struct partition {
  69         int     p_base;         /* base sector# of partition */
  70         int     p_size;         /* #sectors in partition */
  71         short   p_bsize;        /* block size in bytes */
  72         short   p_fsize;        /* frag size in bytes */
  73         char    p_opt;          /* 's'pace/'t'ime optimization pref */
  74         short   p_cpg;          /* cylinders per group */
  75         short   p_density;      /* bytes per inode density */
  76         char    p_minfree;      /* minfree (%) */
  77         char    p_newfs;        /* run newfs during init */
  78         char    p_mountpt[MAXMPTLEN];/* mount point */
  79         char    p_automnt;      /* auto-mount when inserted */
  80         char    p_type[MAXFSTLEN];/* file system type */
  81 } partition_t;
  82
  83 typedef struct disktab {
  84         char    d_name[MAXDNMLEN];      /* drive name */
  85         char    d_type[MAXTYPLEN];      /* drive type */
  86         int     d_secsize;              /* sector size in bytes */
  87         int     d_ntracks;              /* # tracks/cylinder */
  88         int     d_nsectors;             /* # sectors/track */
  89         int     d_ncylinders;           /* # cylinders */
  90         int     d_rpm;                  /* revolutions/minute */
  91         short   d_front;                /* size of front porch (sectors) */
  92         short   d_back;                 /* size of back porch (sectors) */
  93         short   d_ngroups;              /* number of alt groups */
  94         short   d_ag_size;              /* alt group size (sectors) */
  95         short   d_ag_alts;              /* alternate sectors / alt group */
  96         short   d_ag_off;               /* sector offset to first alternate */
  97         int     d_boot0_blkno[NBOOTS];  /* "blk 0" boot locations */
  98         char    d_bootfile[MAXBFLEN];   /* default bootfile */
  99         char    d_hostname[MAXHNLEN];   /* host name */
 100         char    d_rootpartition;        /* root partition e.g. 'a' */
 101         char    d_rwpartition;          /* r/w partition e.g. 'b' */
 102         partition_t d_partitions[NPART];
 103 } disktab_t;
 104
 105 #ifndef KERNEL
 106 struct  disktab *getdiskbyname(), *getdiskbydev();
 107 #endif  /* !KERNEL */
 108
 109 #endif  /* __APPLE_API_OBSOLETE */
 110
 111 #endif  /* _SYS_DISKTAB_ */