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 perr(...) printf(__VA_ARGS__)
36 #define pfatal(...) printf(__VA_ARGS__)
37 #define pwarn(...) printf(__VA_ARGS__)
38 
39 #define	LOSTDIR	"LOST.DIR"
40 
41 /*
42  * Options:
43  */
44 extern int alwaysno;	/* assume "no" for all questions */
45 extern int alwaysyes;	/* assume "yes" for all questions */
46 extern int preen;	/* we are preening */
47 extern int rdonly;	/* device is opened read only (supersedes above) */
48 extern int skipclean;	/* skip clean file systems if preening */
49 
50 /*
51  * function declarations
52  */
53 int ask(int, const char *, ...) __printflike(2, 3);
54 
55 /*
56  * Check the dirty flag.  If the file system is clean, then return 1.
57  * Otherwise, return 0 (this includes the case of FAT12 file systems --
58  * they have no dirty flag, so they must be assumed to be unclean).
59  */
60 int checkdirty(int, struct bootblock *);
61 
62 /*
63  * Check file system given as arg
64  */
65 int checkfilesys(const char *);
66 
67 /*
68  * Return values of various functions
69  */
70 #define	FSOK		0		/* Check was OK */
71 #define	FSBOOTMOD	1		/* Boot block was modified */
72 #define	FSDIRMOD	2		/* Some directory was modified */
73 #define	FSFATMOD	4		/* The FAT was modified */
74 #define	FSERROR		8		/* Some unrecovered error remains */
75 #define	FSFATAL		16		/* Some unrecoverable error occurred */
76 #define	FSDIRTY		32		/* File system is dirty */
77 #define	FSFIXFAT	64		/* Fix file system FAT */
78 
79 /*
80  * read a boot block in a machine independent fashion and translate
81  * it into our struct bootblock.
82  */
83 int readboot(int, struct bootblock *);
84 
85 /*
86  * Correct the FSInfo block.
87  */
88 int writefsinfo(int, struct bootblock *);
89 
90 /*
91  * Read one of the FAT copies and return a pointer to the new
92  * allocated array holding our description of it.
93  */
94 int readfat(int, struct bootblock *, u_int, struct fatEntry **);
95 
96 /*
97  * Check two FAT copies for consistency and merge changes into the
98  * first if necessary.
99  */
100 int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, u_int);
101 
102 /*
103  * Check a FAT
104  */
105 int checkfat(struct bootblock *, struct fatEntry *);
106 
107 /*
108  * Write back FAT entries
109  */
110 int writefat(int, struct bootblock *, struct fatEntry *, int);
111 
112 /*
113  * Read a directory
114  */
115 int resetDosDirSection(struct bootblock *, struct fatEntry *);
116 void finishDosDirSection(void);
117 int handleDirTree(int, struct bootblock *, struct fatEntry *);
118 
119 /*
120  * Cross-check routines run after everything is completely in memory
121  */
122 /*
123  * Check for lost cluster chains
124  */
125 int checklost(int, struct bootblock *, struct fatEntry *);
126 /*
127  * Try to reconnect a lost cluster chain
128  */
129 int reconnect(int, struct bootblock *, struct fatEntry *, cl_t);
130 void finishlf(void);
131 
132 /*
133  * Small helper functions
134  */
135 /*
136  * Return the type of a reserved cluster as text
137  */
138 const char *rsrvdcltype(cl_t);
139 
140 /*
141  * Clear a cluster chain in a FAT
142  */
143 void clearchain(struct bootblock *, struct fatEntry *, cl_t);
144 
145 #endif
146