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 <stdbool.h> 36 37 #include "dosfs.h" 38 39 #define LOSTDIR "LOST.DIR" 40 41 /* 42 * Options: 43 */ 44 extern int alwaysno; /* assume "no" for all questions */ 45 extern int alwaysyes; /* assume "yes" for all questions */ 46 extern int preen; /* we are preening */ 47 extern int rdonly; /* device is opened read only (supersedes above) */ 48 extern int allow_mmap; /* allow the use of mmap() */ 49 50 /* 51 * function declarations 52 */ 53 int ask(int, const char *, ...) __printflike(2, 3); 54 55 /* 56 * Check file system given as arg 57 */ 58 int checkfilesys(const char *); 59 60 /* 61 * Return values of various functions 62 */ 63 #define FSOK 0 /* Check was OK */ 64 #define FSBOOTMOD 1 /* Boot block was modified */ 65 #define FSDIRMOD 2 /* Some directory was modified */ 66 #define FSFATMOD 4 /* The FAT was modified */ 67 #define FSERROR 8 /* Some unrecovered error remains */ 68 #define FSFATAL 16 /* Some unrecoverable error occurred */ 69 #define FSDIRTY 32 /* File system is dirty */ 70 71 /* 72 * read a boot block in a machine independent 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 /* Opaque type */ 83 struct fat_descriptor; 84 85 int cleardirty(struct fat_descriptor *); 86 87 void fat_clear_cl_head(struct fat_descriptor *, cl_t); 88 bool fat_is_cl_head(struct fat_descriptor *, cl_t); 89 90 cl_t fat_get_cl_next(struct fat_descriptor *, cl_t); 91 92 int fat_set_cl_next(struct fat_descriptor *, cl_t, cl_t); 93 94 cl_t fat_allocate_cluster(struct fat_descriptor *fat); 95 96 struct bootblock* fat_get_boot(struct fat_descriptor *); 97 int fat_get_fd(struct fat_descriptor *); 98 bool fat_is_valid_cl(struct fat_descriptor *, cl_t); 99 100 /* 101 * Read the FAT 0 and return a pointer to the newly allocated 102 * descriptor of it. 103 */ 104 int readfat(int, struct bootblock *, struct fat_descriptor **); 105 106 /* 107 * Write back FAT entries 108 */ 109 int writefat(struct fat_descriptor *); 110 111 /* 112 * Read a directory 113 */ 114 int resetDosDirSection(struct fat_descriptor *); 115 void finishDosDirSection(void); 116 int handleDirTree(struct fat_descriptor *); 117 118 /* 119 * Cross-check routines run after everything is completely in memory 120 */ 121 int checkchain(struct fat_descriptor *, cl_t, size_t *); 122 123 /* 124 * Check for lost cluster chains 125 */ 126 int checklost(struct fat_descriptor *); 127 /* 128 * Try to reconnect a lost cluster chain 129 */ 130 int reconnect(struct fat_descriptor *, cl_t, size_t); 131 void finishlf(void); 132 133 /* 134 * Small helper functions 135 */ 136 /* 137 * Return the type of a reserved cluster as text 138 */ 139 const char *rsrvdcltype(cl_t); 140 141 /* 142 * Clear a cluster chain in a FAT 143 */ 144 void clearchain(struct fat_descriptor *, cl_t); 145 146 #endif 147