ext.h revision 96707 
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 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by Martin Husemann
16 *	and Wolfgang Solfrank.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *	$NetBSD: ext.h,v 1.6 2000/04/25 23:02:51 jdolecek Exp $
32 * $FreeBSD: head/sbin/fsck_msdosfs/ext.h 96707 2002-05-16 04:10:46Z trhodes $
33 */
34
35#ifndef EXT_H
36#define EXT_H
37
38#include <sys/types.h>
39
40#include "dosfs.h"
41
42#define	LOSTDIR	"LOST.DIR"
43
44/*
45 * Options:
46 */
47extern int alwaysno;	/* assume "no" for all questions */
48extern int alwaysyes;	/* assume "yes" for all questions */
49extern int preen;	/* we are preening */
50extern int rdonly;	/* device is opened read only (supersedes above) */
51
52extern char *fname;	/* filesystem currently checked */
53
54extern struct dosDirEntry *rootDir;
55
56/*
57 * function declarations
58 */
59int ask(int, const char *, ...) __attribute__((__format__(__printf__,2,3)));
60
61/*
62 * Check filesystem given as arg
63 */
64int checkfilesys(const char *);
65
66/*
67 * Return values of various functions
68 */
69#define	FSOK		0		/* Check was OK */
70#define	FSBOOTMOD	1		/* Boot block was modified */
71#define	FSDIRMOD	2		/* Some directory was modified */
72#define	FSFATMOD	4		/* The FAT was modified */
73#define	FSERROR		8		/* Some unrecovered error remains */
74#define	FSFATAL		16		/* Some unrecoverable error occured */
75#define FSDIRTY		32		/* File system is dirty */
76#define FSFIXFAT	64		/* Fix filesystem FAT */
77
78/*
79 * read a boot block in a machine independend fashion and translate
80 * it into our struct bootblock.
81 */
82int readboot(int, struct bootblock *);
83
84/*
85 * Correct the FSInfo block.
86 */
87int 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 */
93int readfat(int, struct bootblock *, int, struct fatEntry **);
94
95/*
96 * Check two FAT copies for consistency and merge changes into the
97 * first if neccessary.
98 */
99int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, int);
100
101/*
102 * Check a FAT
103 */
104int checkfat(struct bootblock *, struct fatEntry *);
105
106/*
107 * Write back FAT entries
108 */
109int writefat(int, struct bootblock *, struct fatEntry *, int);
110
111/*
112 * Read a directory
113 */
114int resetDosDirSection(struct bootblock *, struct fatEntry *);
115void finishDosDirSection(void);
116int 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 */
124int checklost(int, struct bootblock *, struct fatEntry *);
125/*
126 * Try to reconnect a lost cluster chain
127 */
128int reconnect(int, struct bootblock *, struct fatEntry *, cl_t);
129void finishlf(void);
130
131/*
132 * Small helper functions
133 */
134/*
135 * Return the type of a reserved cluster as text
136 */
137char *rsrvdcltype(cl_t);
138
139/*
140 * Clear a cluster chain in a FAT
141 */
142void clearchain(struct bootblock *, struct fatEntry *, cl_t);
143
144#endif
145