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 * $NetBSD: ext.h,v 1.6 2000/04/25 23:02:51 jdolecek Exp $ 32 * $FreeBSD$ 33 */ 34 35 #ifndef EXT_H 36 #define EXT_H 37 38 #include <sys/types.h> 39 40 #include "dosfs.h" 41 42 #define LOSTDIR "LOST.DIR" 43 44 /* 45 * Options: 46 */ 47 extern int alwaysno; /* assume "no" for all questions */ 48 extern int alwaysyes; /* assume "yes" for all questions */ 49 extern int preen; /* we are preening */ 50 extern int rdonly; /* device is opened read only (supersedes above) */ 51 extern int skipclean; /* skip clean file systems if preening */ 52 53 extern struct dosDirEntry *rootDir; 54 55 /* 56 * function declarations 57 */ 58 int ask(int, const char *, ...) __printflike(2, 3); 59 60 /* 61 * Check the dirty flag. If the file system is clean, then return 1. 62 * Otherwise, return 0 (this includes the case of FAT12 file systems -- 63 * they have no dirty flag, so they must be assumed to be unclean). 64 */ 65 int checkdirty(int, struct bootblock *); 66 67 /* 68 * Check file system given as arg 69 */ 70 int checkfilesys(const char *); 71 72 /* 73 * Return values of various functions 74 */ 75 #define FSOK 0 /* Check was OK */ 76 #define FSBOOTMOD 1 /* Boot block was modified */ 77 #define FSDIRMOD 2 /* Some directory was modified */ 78 #define FSFATMOD 4 /* The FAT was modified */ 79 #define FSERROR 8 /* Some unrecovered error remains */ 80 #define FSFATAL 16 /* Some unrecoverable error occured */ 81 #define FSDIRTY 32 /* File system is dirty */ 82 #define FSFIXFAT 64 /* Fix file system FAT */ 83 84 /* 85 * read a boot block in a machine independend fashion and translate 86 * it into our struct bootblock. 87 */ 88 int readboot(int, struct bootblock *); 89 90 /* 91 * Correct the FSInfo block. 92 */ 93 int writefsinfo(int, struct bootblock *); 94 95 /* 96 * Read one of the FAT copies and return a pointer to the new 97 * allocated array holding our description of it. 98 */ 99 int readfat(int, struct bootblock *, int, struct fatEntry **); 100 101 /* 102 * Check two FAT copies for consistency and merge changes into the 103 * first if neccessary. 104 */ 105 int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, int); 106 107 /* 108 * Check a FAT 109 */ 110 int checkfat(struct bootblock *, struct fatEntry *); 111 112 /* 113 * Write back FAT entries 114 */ 115 int writefat(int, struct bootblock *, struct fatEntry *, int); 116 117 /* 118 * Read a directory 119 */ 120 int resetDosDirSection(struct bootblock *, struct fatEntry *); 121 void finishDosDirSection(void); 122 int handleDirTree(int, struct bootblock *, struct fatEntry *); 123 124 /* 125 * Cross-check routines run after everything is completely in memory 126 */ 127 /* 128 * Check for lost cluster chains 129 */ 130 int checklost(int, struct bootblock *, struct fatEntry *); 131 /* 132 * Try to reconnect a lost cluster chain 133 */ 134 int reconnect(int, struct bootblock *, struct fatEntry *, cl_t); 135 void finishlf(void); 136 137 /* 138 * Small helper functions 139 */ 140 /* 141 * Return the type of a reserved cluster as text 142 */ 143 char *rsrvdcltype(cl_t); 144 145 /* 146 * Clear a cluster chain in a FAT 147 */ 148 void clearchain(struct bootblock *, struct fatEntry *, cl_t); 149 150 #endif 151