diskdev_cmds/fdisk.tproj/mbr.h

   1 /*
   2  * Copyright (c) 2002 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_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. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 /*
  25  * Copyright (c) 1997 Tobias Weingartner
  26  * All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *    This product includes software developed by Tobias Weingartner.
  39  * 4. The name of the author may not be used to endorse or promote products
  40  *    derived from this software without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  43  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  44  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  45  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  46  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  47  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  48  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  49  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  50  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  51  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  52  */
  53
  54 #ifndef _MBR_H
  55 #define _MBR_H
  56
  57 #include "part.h"
  58
  59 #ifndef NDOSPART
  60 #define NDOSPART 4
  61 #define DOSPTYP_UNUSED 0
  62 #define DOSPTYP_EXTEND 5
  63 #define DOSPTYP_EXTENDL 15
  64 #define DOSACTIVE 128
  65 #endif
  66
  67 /* Various constants */
  68 #define MBR_CODE_SIZE 0x1BE
  69 #define MBR_PART_SIZE   0x10
  70 #define MBR_PART_OFF 0x1BE
  71 #define MBR_SIG_OFF 0x1FE
  72 /* MBR_BUF_SIZE is the largest sector size we support */
  73 #define MBR_BUF_SIZE 4096
  74
  75 #define MBR_SIGNATURE 0xAA55
  76
  77 /* MBR type */
  78 typedef struct _mbr_t {
  79         off_t reloffset; /* the offset of the first extended partition that contains all the rest */
  80         off_t offset; /* the absolute offset of this partition */
  81         struct _mbr_t *next; /* pointer to the next MBR in an extended partition chain */
  82         unsigned char code[MBR_CODE_SIZE];
  83         unsigned short signature;
  84         prt_t part[NDOSPART];
  85         unsigned char buf[MBR_BUF_SIZE];
  86 } mbr_t;
  87
  88 /* Prototypes */
  89 void MBR_print_disk __P((char *));
  90 void MBR_print __P((mbr_t *));
  91 void MBR_print_all __P((mbr_t *));
  92 void MBR_parse __P((disk_t *, off_t, off_t, mbr_t *));
  93 void MBR_make __P((mbr_t *));
  94 void MBR_init __P((disk_t *, mbr_t *));
  95 int MBR_read __P((disk_t *,int, off_t, mbr_t *));
  96 int MBR_write __P((disk_t *,int, mbr_t *));
  97 void MBR_pcopy __P((disk_t *, mbr_t *));
  98 mbr_t * MBR_parse_spec __P((FILE *, disk_t *));
  99 void MBR_dump __P((mbr_t *));
 100 void MBR_dump_all __P((mbr_t *));
 101 mbr_t *MBR_alloc __P((mbr_t *));
 102 void MBR_free __P((mbr_t *));
 103 mbr_t * MBR_read_all __P((disk_t *));
 104 int MBR_write_all __P((disk_t *, mbr_t *));
 105 void MBR_clear __P((mbr_t *));
 106
 107 /* Sanity check */
 108 #include <machine/param.h>
 109 #if (DEV_BSIZE != 512)
 110 #error "DEV_BSIZE != 512, somebody better fix me!"
 111 #endif
 112
 113 #endif /* _MBR_H */
 114