1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 * $NetBSD: ext.h,v 1.6 2000/04/25 23:02:51 jdolecek Exp $ 27 * $FreeBSD$ 28 */ 29 30 #ifndef EXT_H 31 #define EXT_H 32 33 #include <sys/types.h> 34 35 #include "dosfs.h" 36 37 #define LOSTDIR "LOST.DIR" 38 39 /* 40 * Options: 41 */ 42 extern int alwaysno; /* assume "no" for all questions */ 43 extern int alwaysyes; /* assume "yes" for all questions */ 44 extern int preen; /* we are preening */ 45 extern int rdonly; /* device is opened read only (supersedes above) */ 46 extern int skipclean; /* skip clean file systems if preening */ 47 48 /* 49 * function declarations 50 */ 51 int 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 */ 58 int checkdirty(int, struct bootblock *); 59 60 /* 61 * Check file system given as arg 62 */ 63 int 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 */ 81 int readboot(int, struct bootblock *); 82 83 /* 84 * Correct the FSInfo block. 85 */ 86 int 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 */ 92 int 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 */ 98 int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, u_int); 99 100 /* 101 * Check a FAT 102 */ 103 int checkfat(struct bootblock *, struct fatEntry *); 104 105 /* 106 * Write back FAT entries 107 */ 108 int writefat(int, struct bootblock *, struct fatEntry *, int); 109 110 /* 111 * Read a directory 112 */ 113 int resetDosDirSection(struct bootblock *, struct fatEntry *); 114 void finishDosDirSection(void); 115 int 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 */ 123 int checklost(int, struct bootblock *, struct fatEntry *); 124 /* 125 * Try to reconnect a lost cluster chain 126 */ 127 int reconnect(int, struct bootblock *, struct fatEntry *, cl_t); 128 void finishlf(void); 129 130 /* 131 * Small helper functions 132 */ 133 /* 134 * Return the type of a reserved cluster as text 135 */ 136 const char *rsrvdcltype(cl_t); 137 138 /* 139 * Clear a cluster chain in a FAT 140 */ 141 void clearchain(struct bootblock *, struct fatEntry *, cl_t); 142 143 #endif 144