sbin/fsck_msdos/ext.h

   1 /*      $NetBSD: ext.h,v 1.12 2008/06/13 20:46:09 martin Exp $  */
   2
   3 /*
   4  * Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
   5  * Copyright (c) 1995 Martin Husemann
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #ifndef EXT_H
  29 #define EXT_H
  30
  31 #include <sys/types.h>
  32
  33 #include "dosfs.h"
  34
  35 #define LOSTDIR "LOST.DIR"
  36
  37 /*
  38  * Options:
  39  */
  40 extern int alwaysno;    /* assume "no" for all questions */
  41 extern int alwaysyes;   /* assume "yes" for all questions */
  42 extern int preen;       /* we are preening */
  43 extern int rdonly;      /* device is opened read only (supersedes above) */
  44
  45 extern char *fname;     /* filesystem currently checked */
  46
  47 extern struct dosDirEntry *rootDir;
  48
  49 /*
  50  * function declarations
  51  */
  52 int ask(int, const char *, ...) __attribute__((__format__(__printf__,2,3)));
  53
  54 /*
  55  * Check filesystem given as arg
  56  */
  57 int checkfilesys(const char *);
  58
  59 /*
  60  * Return values of various functions
  61  */
  62 #define FSOK            0               /* Check was OK */
  63 #define FSBOOTMOD       1               /* Boot block was modified */
  64 #define FSDIRMOD        2               /* Some directory was modified */
  65 #define FSFATMOD        4               /* The FAT was modified */
  66 #define FSERROR         8               /* Some unrecovered error remains */
  67 #define FSFATAL         16              /* Some unrecoverable error occurred */
  68 #define FSDIRTY         32              /* File system is dirty */
  69 #define FSFIXFAT        64              /* Fix file system FAT */
  70
  71 /*
  72  * read a boot block in a machine independend fashion and translate
  73  * it into our struct bootblock.
  74  */
  75 int readboot(int, struct bootblock *);
  76
  77 /*
  78  * Correct the FSInfo block.
  79  */
  80 int writefsinfo(int, struct bootblock *);
  81
  82 /*
  83  * Read one of the FAT copies and return a pointer to the new
  84  * allocated array holding our description of it.
  85  */
  86 int readfat(int, struct bootblock *, u_int, struct fatEntry **);
  87
  88 /*
  89  * Check two FAT copies for consistency and merge changes into the
  90  * first if necessary.
  91  */
  92 int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, u_int);
  93
  94 /*
  95  * Check a FAT
  96  */
  97 int checkfat(struct bootblock *, struct fatEntry *);
  98
  99 /*
 100  * Write back FAT entries
 101  */
 102 int writefat(int, struct bootblock *, struct fatEntry *, int);
 103
 104 /*
 105  * Read a directory
 106  */
 107 int resetDosDirSection(struct bootblock *, struct fatEntry *);
 108 void finishDosDirSection(void);
 109 int handleDirTree(int, struct bootblock *, struct fatEntry *);
 110
 111 /*
 112  * Cross-check routines run after everything is completely in memory
 113  */
 114 /*
 115  * Check for lost cluster chains
 116  */
 117 int checklost(int, struct bootblock *, struct fatEntry *);
 118 /*
 119  * Try to reconnect a lost cluster chain
 120  */
 121 int reconnect(int, struct bootblock *, struct fatEntry *, cl_t);
 122 void finishlf(void);
 123
 124 /*
 125  * Small helper functions
 126  */
 127 /*
 128  * Return the type of a reserved cluster as text
 129  */
 130 const char *rsrvdcltype(cl_t);
 131
 132 /*
 133  * Clear a cluster chain in a FAT
 134  */
 135 void clearchain(struct bootblock *, struct fatEntry *, cl_t);
 136
 137 #endif