sbin/fsck_msdosfs/ext.h

   1 /*
   2  * Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
   3  * Copyright (c) 1995 Martin Husemann
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Martin Husemann
  16  *      and Wolfgang Solfrank.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
  22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  24  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  *
  32  *      $NetBSD: ext.h,v 1.6 2000/04/25 23:02:51 jdolecek Exp $
  33  * $FreeBSD: src/sbin/fsck_msdosfs/ext.h,v 1.1.2.1 2001/08/01 05:47:56 obrien Exp $
  34  */
  35
  36 #ifndef EXT_H
  37 #define EXT_H
  38
  39 #include <sys/types.h>
  40
  41 #include "dosfs.h"
  42
  43 #define LOSTDIR "LOST.DIR"
  44
  45 /*
  46  * Options:
  47  */
  48 extern int alwaysno;    /* assume "no" for all questions */
  49 extern int alwaysyes;   /* assume "yes" for all questions */
  50 extern int preen;       /* we are preening */
  51 extern int rdonly;      /* device is opened read only (supersedes above) */
  52
  53 extern char *fname;     /* filesystem currently checked */
  54
  55 extern struct dosDirEntry *rootDir;
  56
  57 /*
  58  * function declarations
  59  */
  60 int ask(int, const char *, ...) __printflike(2, 3);
  61
  62 /*
  63  * Check filesystem given as arg
  64  */
  65 int checkfilesys(const char *);
  66
  67 /*
  68  * Return values of various functions
  69  */
  70 #define FSOK            0               /* Check was OK */
  71 #define FSBOOTMOD       1               /* Boot block was modified */
  72 #define FSDIRMOD        2               /* Some directory was modified */
  73 #define FSFATMOD        4               /* The FAT was modified */
  74 #define FSERROR         8               /* Some unrecovered error remains */
  75 #define FSFATAL         16              /* Some unrecoverable error occured */
  76 #define FSDIRTY         32              /* File system is dirty */
  77 #define FSFIXFAT        64              /* Fix file system FAT */
  78
  79 /*
  80  * read a boot block in a machine independend fashion and translate
  81  * it into our struct bootblock.
  82  */
  83 int readboot(int, struct bootblock *);
  84
  85 /*
  86  * Correct the FSInfo block.
  87  */
  88 int writefsinfo(int, struct bootblock *);
  89
  90 /*
  91  * Read one of the FAT copies and return a pointer to the new
  92  * allocated array holding our description of it.
  93  */
  94 int readfat(int, struct bootblock *, int, struct fatEntry **);
  95
  96 /*
  97  * Check two FAT copies for consistency and merge changes into the
  98  * first if neccessary.
  99  */
 100 int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, int);
 101
 102 /*
 103  * Check a FAT
 104  */
 105 int checkfat(struct bootblock *, struct fatEntry *);
 106
 107 /*
 108  * Write back FAT entries
 109  */
 110 int writefat(int, struct bootblock *, struct fatEntry *, int);
 111
 112 /*
 113  * Read a directory
 114  */
 115 int resetDosDirSection(struct bootblock *, struct fatEntry *);
 116 void finishDosDirSection(void);
 117 int handleDirTree(int, struct bootblock *, struct fatEntry *);
 118
 119 /*
 120  * Cross-check routines run after everything is completely in memory
 121  */
 122 /*
 123  * Check for lost cluster chains
 124  */
 125 int checklost(int, struct bootblock *, struct fatEntry *);
 126 /*
 127  * Try to reconnect a lost cluster chain
 128  */
 129 int reconnect(int, struct bootblock *, struct fatEntry *, cl_t);
 130 void finishlf(void);
 131
 132 /*
 133  * Small helper functions
 134  */
 135 /*
 136  * Return the type of a reserved cluster as text
 137  */
 138 char *rsrvdcltype(cl_t);
 139
 140 /*
 141  * Clear a cluster chain in a FAT
 142  */
 143 void clearchain(struct bootblock *, struct fatEntry *, cl_t);
 144
 145 #endif