1 /* $OpenBSD: ext.h,v 1.8 2003/03/11 04:42:25 david Exp $ */ 2 /* $NetBSD: ext.h,v 1.5 1997/10/17 11:19:48 ws Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank 6 * Copyright (c) 1995 Martin Husemann 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Martin Husemann 19 * and Wolfgang Solfrank. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #ifndef EXT_H 37 #define EXT_H 38 39 #include <sys/types.h> 40 41 #include "dosfs.h" 42 #include "fsutil.h" 43 44 #define LOSTDIR "LOST.DIR" 45 46 /* 47 * Options: 48 */ 49 extern int alwaysno; /* assume "no" for all questions */ 50 extern int alwaysyes; /* assume "yes" for all questions */ 51 extern int preen; /* we are preening */ 52 extern int rdonly; /* device is opened read only (supersedes above) */ 53 54 extern char *fname; /* filesystem currently checked */ 55 56 extern struct dosDirEntry *rootDir; 57 58 /* 59 * function declarations 60 */ 61 int ask(int, const char *, ...); 62 63 /* 64 * Check filesystem given as arg 65 */ 66 int checkfilesys(const char *); 67 68 /* 69 * Return values of various functions 70 */ 71 #define FSOK 0 /* Check was OK */ 72 #define FSBOOTMOD 1 /* Boot block was modified */ 73 #define FSDIRMOD 2 /* Some directory was modified */ 74 #define FSFATMOD 4 /* The FAT was modified */ 75 #define FSERROR 8 /* Some unrecovered error remains */ 76 #define FSFATAL 16 /* Some unrecoverable error occurred */ 77 78 /* 79 * read a boot block in a machine independend fashion and translate 80 * it into our struct bootblock. 81 */ 82 int readboot(int, struct bootblock *); 83 84 /* 85 * Correct the FSInfo block. 86 */ 87 int writefsinfo(int, struct bootblock *); 88 89 /* 90 * Read one of the FAT copies and return a pointer to the new 91 * allocated array holding our description of it. 92 */ 93 int readfat(int, struct bootblock *, int, struct fatEntry **); 94 95 /* 96 * Check two FAT copies for consistency and merge changes into the 97 * first if necessary. 98 */ 99 int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, int); 100 101 /* 102 * Check a FAT 103 */ 104 int checkfat(struct bootblock *, struct fatEntry *); 105 106 /* 107 * Write back FAT entries 108 */ 109 int writefat(int, struct bootblock *, struct fatEntry *); 110 111 /* 112 * Read a directory 113 */ 114 int resetDosDirSection(struct bootblock *, struct fatEntry *); 115 void finishDosDirSection(void); 116 int handleDirTree(int, struct bootblock *, struct fatEntry *); 117 118 /* 119 * Cross-check routines run after everything is completely in memory 120 */ 121 /* 122 * Check for lost cluster chains 123 */ 124 int checklost(int, struct bootblock *, struct fatEntry *); 125 /* 126 * Try to reconnect a lost cluster chain 127 */ 128 int reconnect(int, struct bootblock *, struct fatEntry *, cl_t); 129 void finishlf(void); 130 131 /* 132 * Small helper functions 133 */ 134 /* 135 * Return the type of a reserved cluster as text 136 */ 137 char *rsrvdcltype(cl_t); 138 139 /* 140 * Clear a cluster chain in a FAT 141 */ 142 void clearchain(struct bootblock *, struct fatEntry *, cl_t); 143 144 #endif 145