2 * Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
3 * Copyright (c) 1995 Martin Husemann
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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 $
31 #include <sys/types.h>
35 #define LOSTDIR "LOST.DIR"
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 */
46 extern struct dosDirEntry *rootDir;
49 * function declarations
51 int ask(int, const char *, ...) __printflike(2, 3);
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).
58 int checkdirty(int, struct bootblock *);
61 * Check file system given as arg
63 int checkfilesys(const char *);
66 * Return values of various functions
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 */
78 * read a boot block in a machine independent fashion and translate
79 * it into our struct bootblock.
81 int readboot(int, struct bootblock *);
84 * Correct the FSInfo block.
86 int writefsinfo(int, struct bootblock *);
89 * Read one of the FAT copies and return a pointer to the new
90 * allocated array holding our description of it.
92 int readfat(int, struct bootblock *, u_int, struct fatEntry **);
95 * Check two FAT copies for consistency and merge changes into the
98 int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, u_int);
103 int checkfat(struct bootblock *, struct fatEntry *);
106 * Write back FAT entries
108 int writefat(int, struct bootblock *, struct fatEntry *, int);
113 int resetDosDirSection(struct bootblock *, struct fatEntry *);
114 void finishDosDirSection(void);
115 int handleDirTree(int, struct bootblock *, struct fatEntry *);
118 * Cross-check routines run after everything is completely in memory
121 * Check for lost cluster chains
123 int checklost(int, struct bootblock *, struct fatEntry *);
125 * Try to reconnect a lost cluster chain
127 int reconnect(int, struct bootblock *, struct fatEntry *, cl_t);
131 * Small helper functions
134 * Return the type of a reserved cluster as text
136 char *rsrvdcltype(cl_t);
139 * Clear a cluster chain in a FAT
141 void clearchain(struct bootblock *, struct fatEntry *, cl_t);