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Annotation of XNU/bsd/sys/disktab.h, revision 1.1.1.1

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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