ext.h revision 123883 
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 123883 2003-12-27 06:44:32Z bde $
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 force;	/* force check even the fs is clean */
50extern int preen;	/* we are preening */
51extern int rdonly;	/* device is opened read only (supersedes above) */
52
53extern struct dosDirEntry *rootDir;
54
55/*
56 * function declarations
57 */
58int ask(int, const char *, ...) __attribute__((__format__(__printf__,2,3)));
59
60/*
61 * Check the dirty flag.  If the file system is clean, then return 1.
62 * Otherwise, return 0 (this includes the case of FAT12 file systems --
63 * they have no dirty flag, so they must be assumed to be unclean).
64 */
65int checkdirty(int, struct bootblock *);
66
67/*
68 * Check file system given as arg
69 */
70int checkfilesys(const char *);
71
72/*
73 * Return values of various functions
74 */
75#define	FSOK		0		/* Check was OK */
76#define	FSBOOTMOD	1		/* Boot block was modified */
77#define	FSDIRMOD	2		/* Some directory was modified */
78#define	FSFATMOD	4		/* The FAT was modified */
79#define	FSERROR		8		/* Some unrecovered error remains */
80#define	FSFATAL		16		/* Some unrecoverable error occured */
81#define FSDIRTY		32		/* File system is dirty */
82#define FSFIXFAT	64		/* Fix file system FAT */
83
84/*
85 * read a boot block in a machine independend fashion and translate
86 * it into our struct bootblock.
87 */
88int readboot(int, struct bootblock *);
89
90/*
91 * Correct the FSInfo block.
92 */
93int writefsinfo(int, struct bootblock *);
94
95/*
96 * Read one of the FAT copies and return a pointer to the new
97 * allocated array holding our description of it.
98 */
99int readfat(int, struct bootblock *, int, struct fatEntry **);
100
101/*
102 * Check two FAT copies for consistency and merge changes into the
103 * first if neccessary.
104 */
105int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, int);
106
107/*
108 * Check a FAT
109 */
110int checkfat(struct bootblock *, struct fatEntry *);
111
112/*
113 * Write back FAT entries
114 */
115int writefat(int, struct bootblock *, struct fatEntry *, int);
116
117/*
118 * Read a directory
119 */
120int resetDosDirSection(struct bootblock *, struct fatEntry *);
121void finishDosDirSection(void);
122int handleDirTree(int, struct bootblock *, struct fatEntry *);
123
124/*
125 * Cross-check routines run after everything is completely in memory
126 */
127/*
128 * Check for lost cluster chains
129 */
130int checklost(int, struct bootblock *, struct fatEntry *);
131/*
132 * Try to reconnect a lost cluster chain
133 */
134int reconnect(int, struct bootblock *, struct fatEntry *, cl_t);
135void finishlf(void);
136
137/*
138 * Small helper functions
139 */
140/*
141 * Return the type of a reserved cluster as text
142 */
143char *rsrvdcltype(cl_t);
144
145/*
146 * Clear a cluster chain in a FAT
147 */
148void clearchain(struct bootblock *, struct fatEntry *, cl_t);
149
150#endif
151