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/*
* Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
* Copyright (c) 1995 Martin Husemann
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Martin Husemann
* and Wolfgang Solfrank.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* $NetBSD: ext.h,v 1.6 2000/04/25 23:02:51 jdolecek Exp $
* $FreeBSD: src/sbin/fsck_msdosfs/ext.h,v 1.10.20.1 2009/04/15 03:14:26 kensmith Exp $
*/

#ifndef EXT_H
#define EXT_H

#include <sys/types.h>

#include "dosfs.h"

#define LOSTDIR "LOST.DIR"

/*
* Options:
*/
extern int alwaysno; /* assume "no" for all questions */
extern int alwaysyes; /* assume "yes" for all questions */
extern int preen; /* we are preening */
extern int rdonly; /* device is opened read only (supersedes above) */
extern int skipclean; /* skip clean file systems if preening */

extern struct dosDirEntry *rootDir;

/*
* function declarations
*/
int ask(int, const char *, ...);

/*
* Check the dirty flag. If the file system is clean, then return 1.
* Otherwise, return 0 (this includes the case of FAT12 file systems --
* they have no dirty flag, so they must be assumed to be unclean).
*/
int checkdirty(int, struct bootblock *);

/*
* Check file system given as arg
*/
int checkfilesys(const char *);

/*
* Return values of various functions
*/
#define FSOK 0 /* Check was OK */
#define FSBOOTMOD 1 /* Boot block was modified */
#define FSDIRMOD 2 /* Some directory was modified */
#define FSFATMOD 4 /* The FAT was modified */
#define FSERROR 8 /* Some unrecovered error remains */
#define FSFATAL 16 /* Some unrecoverable error occured */
#define FSDIRTY 32 /* File system is dirty */
#define FSFIXFAT 64 /* Fix file system FAT */

/*
* read a boot block in a machine independend fashion and translate
* it into our struct bootblock.
*/
int readboot(int, struct bootblock *);

/*
* Correct the FSInfo block.
*/
int writefsinfo(int, struct bootblock *);

/*
* Read one of the FAT copies and return a pointer to the new
* allocated array holding our description of it.
*/
int readfat(int, struct bootblock *, int, struct fatEntry **);

/*
* Check two FAT copies for consistency and merge changes into the
* first if neccessary.
*/
int comparefat(struct bootblock *, struct fatEntry *, struct fatEntry *, int);

/*
* Check a FAT
*/
int checkfat(struct bootblock *, struct fatEntry *);

/*
* Write back FAT entries
*/
int writefat(int, struct bootblock *, struct fatEntry *, int);

/*
* Read a directory
*/
int resetDosDirSection(struct bootblock *, struct fatEntry *);
void finishDosDirSection(void);
int handleDirTree(int, struct bootblock *, struct fatEntry *);

/*
* Cross-check routines run after everything is completely in memory
*/
/*
* Check for lost cluster chains
*/
int checklost(int, struct bootblock *, struct fatEntry *);
/*
* Try to reconnect a lost cluster chain
*/
int reconnect(int, struct bootblock *, struct fatEntry *, cl_t);
void finishlf(void);

/*
* Small helper functions
*/
/*
* Return the type of a reserved cluster as text
*/
char *rsrvdcltype(cl_t);

/*
* Clear a cluster chain in a FAT
*/
void clearchain(struct bootblock *, struct fatEntry *, cl_t);

#endif
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