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 *
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 $
25 * $FreeBSD$
26 */
27
28#ifndef EXT_H
29#define	EXT_H
30
31#include <sys/types.h>
32
33#include "dosfs.h"
34
35#define	LOSTDIR	"LOST.DIR"
36
37/*
38 * Options:
39 */
40extern int alwaysno;	/* assume "no" for all questions */
41extern int alwaysyes;	/* assume "yes" for all questions */
42extern int preen;	/* we are preening */
43extern int rdonly;	/* device is opened read only (supersedes above) */
44extern int skipclean;	/* skip clean file systems if preening */
45
46extern struct dosDirEntry *rootDir;
47
48/*
49 * function declarations
50 */
51int 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 */
58int checkdirty(int, struct bootblock *);
59
60/*
61 * Check file system given as arg
62 */
63int 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 */
81int readboot(int, struct bootblock *);
82
83/*
84 * Correct the FSInfo block.
85 */
86int 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 */
92int 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 */
98int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, u_int);
99
100/*
101 * Check a FAT
102 */
103int checkfat(struct bootblock *, struct fatEntry *);
104
105/*
106 * Write back FAT entries
107 */
108int writefat(int, struct bootblock *, struct fatEntry *, int);
109
110/*
111 * Read a directory
112 */
113int resetDosDirSection(struct bootblock *, struct fatEntry *);
114void finishDosDirSection(void);
115int 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 */
123int checklost(int, struct bootblock *, struct fatEntry *);
124/*
125 * Try to reconnect a lost cluster chain
126 */
127int reconnect(int, struct bootblock *, struct fatEntry *, cl_t);
128void finishlf(void);
129
130/*
131 * Small helper functions
132 */
133/*
134 * Return the type of a reserved cluster as text
135 */
136const char *rsrvdcltype(cl_t);
137
138/*
139 * Clear a cluster chain in a FAT
140 */
141void clearchain(struct bootblock *, struct fatEntry *, cl_t);
142
143#endif
144