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 */ 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 extern int skipclean; /* skip clean file systems if preening */ 45 46 /* 47 * function declarations 48 */ 49 int ask(int, const char *, ...) __printflike(2, 3); 50 51 /* 52 * Check the dirty flag. If the file system is clean, then return 1. 53 * Otherwise, return 0 (this includes the case of FAT12 file systems -- 54 * they have no dirty flag, so they must be assumed to be unclean). 55 */ 56 int checkdirty(int, struct bootblock *); 57 58 /* 59 * Check file system given as arg 60 */ 61 int checkfilesys(const char *); 62 63 /* 64 * Return values of various functions 65 */ 66 #define FSOK 0 /* Check was OK */ 67 #define FSBOOTMOD 1 /* Boot block was modified */ 68 #define FSDIRMOD 2 /* Some directory was modified */ 69 #define FSFATMOD 4 /* The FAT was modified */ 70 #define FSERROR 8 /* Some unrecovered error remains */ 71 #define FSFATAL 16 /* Some unrecoverable error occurred */ 72 #define FSDIRTY 32 /* File system is dirty */ 73 #define FSFIXFAT 64 /* Fix file system FAT */ 74 75 /* 76 * read a boot block in a machine independent fashion and translate 77 * it into our struct bootblock. 78 */ 79 int readboot(int, struct bootblock *); 80 81 /* 82 * Correct the FSInfo block. 83 */ 84 int writefsinfo(int, struct bootblock *); 85 86 /* 87 * Read one of the FAT copies and return a pointer to the new 88 * allocated array holding our description of it. 89 */ 90 int readfat(int, struct bootblock *, u_int, struct fatEntry **); 91 92 /* 93 * Check two FAT copies for consistency and merge changes into the 94 * first if necessary. 95 */ 96 int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, u_int); 97 98 /* 99 * Check a FAT 100 */ 101 int checkfat(struct bootblock *, struct fatEntry *); 102 103 /* 104 * Write back FAT entries 105 */ 106 int writefat(int, struct bootblock *, struct fatEntry *, int); 107 108 /* 109 * Read a directory 110 */ 111 int resetDosDirSection(struct bootblock *, struct fatEntry *); 112 void finishDosDirSection(void); 113 int handleDirTree(int, struct bootblock *, struct fatEntry *); 114 115 /* 116 * Cross-check routines run after everything is completely in memory 117 */ 118 /* 119 * Check for lost cluster chains 120 */ 121 int checklost(int, struct bootblock *, struct fatEntry *); 122 /* 123 * Try to reconnect a lost cluster chain 124 */ 125 int reconnect(int, struct bootblock *, struct fatEntry *, cl_t); 126 void finishlf(void); 127 128 /* 129 * Small helper functions 130 */ 131 /* 132 * Return the type of a reserved cluster as text 133 */ 134 const char *rsrvdcltype(cl_t); 135 136 /* 137 * Clear a cluster chain in a FAT 138 */ 139 void clearchain(struct bootblock *, struct fatEntry *, cl_t); 140 141 #endif 142