1/*	$NetBSD: ext.h,v 1.12 2008/06/13 20:46:09 martin Exp $	*/
2
3/*
4 * Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
5 * Copyright (c) 1995 Martin Husemann
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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) */
44
45extern char *fname;	/* filesystem currently checked */
46
47extern struct dosDirEntry *rootDir;
48
49/*
50 * function declarations
51 */
52int ask(int, const char *, ...) __attribute__((__format__(__printf__,2,3)));
53
54/*
55 * Check filesystem given as arg
56 */
57int checkfilesys(const char *);
58
59/*
60 * Return values of various functions
61 */
62#define	FSOK		0		/* Check was OK */
63#define	FSBOOTMOD	1		/* Boot block was modified */
64#define	FSDIRMOD	2		/* Some directory was modified */
65#define	FSFATMOD	4		/* The FAT was modified */
66#define	FSERROR		8		/* Some unrecovered error remains */
67#define	FSFATAL		16		/* Some unrecoverable error occurred */
68#define FSDIRTY		32		/* File system is dirty */
69#define FSFIXFAT	64		/* Fix file system FAT */
70
71/*
72 * read a boot block in a machine independend fashion and translate
73 * it into our struct bootblock.
74 */
75int readboot(int, struct bootblock *);
76
77/*
78 * Correct the FSInfo block.
79 */
80int writefsinfo(int, struct bootblock *);
81
82/*
83 * Read one of the FAT copies and return a pointer to the new
84 * allocated array holding our description of it.
85 */
86int readfat(int, struct bootblock *, u_int, struct fatEntry **);
87
88/*
89 * Check two FAT copies for consistency and merge changes into the
90 * first if necessary.
91 */
92int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, u_int);
93
94/*
95 * Check a FAT
96 */
97int checkfat(struct bootblock *, struct fatEntry *);
98
99/*
100 * Write back FAT entries
101 */
102int writefat(int, struct bootblock *, struct fatEntry *, int);
103
104/*
105 * Read a directory
106 */
107int resetDosDirSection(struct bootblock *, struct fatEntry *);
108void finishDosDirSection(void);
109int handleDirTree(int, struct bootblock *, struct fatEntry *);
110
111/*
112 * Cross-check routines run after everything is completely in memory
113 */
114/*
115 * Check for lost cluster chains
116 */
117int checklost(int, struct bootblock *, struct fatEntry *);
118/*
119 * Try to reconnect a lost cluster chain
120 */
121int reconnect(int, struct bootblock *, struct fatEntry *, cl_t);
122void finishlf(void);
123
124/*
125 * Small helper functions
126 */
127/*
128 * Return the type of a reserved cluster as text
129 */
130const char *rsrvdcltype(cl_t);
131
132/*
133 * Clear a cluster chain in a FAT
134 */
135void clearchain(struct bootblock *, struct fatEntry *, cl_t);
136
137#endif
138