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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * $NetBSD: ext.h,v 1.6 2000/04/25 23:02:51 jdolecek Exp $ 25 * $FreeBSD$ 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 */ 40extern int alwaysno; /* assume "no" for all questions */ 41extern int alwaysyes; /* assume "yes" for all questions */ 42extern int preen; /* we are preening */ 43extern int rdonly; /* device is opened read only (supersedes above) */ 44extern int skipclean; /* skip clean file systems if preening */ 45 46extern struct dosDirEntry *rootDir; 47 48/* 49 * function declarations 50 */ 51int ask(int, const char *, ...) __printflike(2, 3); 52 53/* 54 * Check the dirty flag. If the file system is clean, then return 1. 55 * Otherwise, return 0 (this includes the case of FAT12 file systems -- 56 * they have no dirty flag, so they must be assumed to be unclean). 57 */ 58int checkdirty(int, struct bootblock *); 59 60/* 61 * Check file system given as arg 62 */ 63int checkfilesys(const char *); 64 65/* 66 * Return values of various functions 67 */ 68#define FSOK 0 /* Check was OK */ 69#define FSBOOTMOD 1 /* Boot block was modified */ 70#define FSDIRMOD 2 /* Some directory was modified */ 71#define FSFATMOD 4 /* The FAT was modified */ 72#define FSERROR 8 /* Some unrecovered error remains */ 73#define FSFATAL 16 /* Some unrecoverable error occurred */ 74#define FSDIRTY 32 /* File system is dirty */ 75#define FSFIXFAT 64 /* Fix file system FAT */ 76 77/* 78 * read a boot block in a machine independent fashion and translate 79 * it into our struct bootblock. 80 */ 81int readboot(int, struct bootblock *); 82 83/* 84 * Correct the FSInfo block. 85 */ 86int writefsinfo(int, struct bootblock *); 87 88/* 89 * Read one of the FAT copies and return a pointer to the new 90 * allocated array holding our description of it. 91 */ 92int readfat(int, struct bootblock *, u_int, struct fatEntry **); 93 94/* 95 * Check two FAT copies for consistency and merge changes into the 96 * first if necessary. 97 */ 98int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, u_int); 99 100/* 101 * Check a FAT 102 */ 103int checkfat(struct bootblock *, struct fatEntry *); 104 105/* 106 * Write back FAT entries 107 */ 108int writefat(int, struct bootblock *, struct fatEntry *, int); 109 110/* 111 * Read a directory 112 */ 113int resetDosDirSection(struct bootblock *, struct fatEntry *); 114void finishDosDirSection(void); 115int handleDirTree(int, struct bootblock *, struct fatEntry *); 116 117/* 118 * Cross-check routines run after everything is completely in memory 119 */ 120/* 121 * Check for lost cluster chains 122 */ 123int checklost(int, struct bootblock *, struct fatEntry *); 124/* 125 * Try to reconnect a lost cluster chain 126 */ 127int reconnect(int, struct bootblock *, struct fatEntry *, cl_t); 128void finishlf(void); 129 130/* 131 * Small helper functions 132 */ 133/* 134 * Return the type of a reserved cluster as text 135 */ 136const char *rsrvdcltype(cl_t); 137 138/* 139 * Clear a cluster chain in a FAT 140 */ 141void clearchain(struct bootblock *, struct fatEntry *, cl_t); 142 143#endif 144