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ext.h revision 1.10
      1  1.10       wiz /*	$NetBSD: ext.h,v 1.10 2001/09/16 16:34:26 wiz Exp $	*/
      2   1.2        ws 
      3   1.1        ws /*
      4   1.5        ws  * Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
      5   1.1        ws  * Copyright (c) 1995 Martin Husemann
      6   1.1        ws  *
      7   1.1        ws  * Redistribution and use in source and binary forms, with or without
      8   1.1        ws  * modification, are permitted provided that the following conditions
      9   1.1        ws  * are met:
     10   1.1        ws  * 1. Redistributions of source code must retain the above copyright
     11   1.1        ws  *    notice, this list of conditions and the following disclaimer.
     12   1.1        ws  * 2. Redistributions in binary form must reproduce the above copyright
     13   1.1        ws  *    notice, this list of conditions and the following disclaimer in the
     14   1.1        ws  *    documentation and/or other materials provided with the distribution.
     15   1.1        ws  * 3. All advertising materials mentioning features or use of this software
     16   1.1        ws  *    must display the following acknowledgement:
     17   1.1        ws  *	This product includes software developed by Martin Husemann
     18   1.1        ws  *	and Wolfgang Solfrank.
     19   1.1        ws  * 4. Neither the name of the University nor the names of its contributors
     20   1.1        ws  *    may be used to endorse or promote products derived from this software
     21   1.1        ws  *    without specific prior written permission.
     22   1.1        ws  *
     23   1.1        ws  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
     24   1.1        ws  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     25   1.1        ws  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26   1.1        ws  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     27   1.1        ws  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     28   1.1        ws  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     29   1.1        ws  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     30   1.1        ws  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     31   1.1        ws  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     32   1.1        ws  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     33   1.1        ws  */
     34   1.1        ws 
     35   1.1        ws #ifndef EXT_H
     36   1.1        ws #define EXT_H
     37   1.1        ws 
     38   1.1        ws #include <sys/types.h>
     39   1.1        ws 
     40   1.1        ws #include "dosfs.h"
     41   1.1        ws 
     42   1.1        ws #define	LOSTDIR	"LOST.DIR"
     43   1.1        ws 
     44   1.1        ws /*
     45   1.1        ws  * Options:
     46   1.1        ws  */
     47   1.1        ws extern int alwaysno;	/* assume "no" for all questions */
     48   1.1        ws extern int alwaysyes;	/* assume "yes" for all questions */
     49   1.1        ws extern int preen;	/* we are preening */
     50   1.1        ws extern int rdonly;	/* device is opened read only (supersedes above) */
     51   1.1        ws 
     52   1.1        ws extern char *fname;	/* filesystem currently checked */
     53   1.1        ws 
     54   1.3        ws extern struct dosDirEntry *rootDir;
     55   1.3        ws 
     56   1.5        ws /*
     57   1.1        ws  * function declarations
     58   1.1        ws  */
     59   1.7        is int ask __P((int, const char *, ...)) __attribute__((__format__(__printf__,2,3)));
     60   1.1        ws 
     61   1.1        ws /*
     62   1.1        ws  * Check filesystem given as arg
     63   1.1        ws  */
     64   1.1        ws int checkfilesys __P((const char *));
     65   1.1        ws 
     66   1.1        ws /*
     67   1.1        ws  * Return values of various functions
     68   1.1        ws  */
     69   1.1        ws #define	FSOK		0		/* Check was OK */
     70   1.5        ws #define	FSBOOTMOD	1		/* Boot block was modified */
     71   1.5        ws #define	FSDIRMOD	2		/* Some directory was modified */
     72   1.5        ws #define	FSFATMOD	4		/* The FAT was modified */
     73   1.5        ws #define	FSERROR		8		/* Some unrecovered error remains */
     74  1.10       wiz #define	FSFATAL		16		/* Some unrecoverable error occurred */
     75   1.6  jdolecek #define FSDIRTY		32		/* File system is dirty */
     76   1.6  jdolecek #define FSFIXFAT	64		/* Fix file system FAT */
     77   1.1        ws 
     78   1.1        ws /*
     79   1.1        ws  * read a boot block in a machine independend fashion and translate
     80   1.1        ws  * it into our struct bootblock.
     81   1.1        ws  */
     82   1.1        ws int readboot __P((int, struct bootblock *));
     83   1.1        ws 
     84   1.5        ws /*
     85   1.5        ws  * Correct the FSInfo block.
     86   1.5        ws  */
     87   1.5        ws int writefsinfo __P((int, struct bootblock *));
     88   1.1        ws 
     89   1.1        ws /*
     90   1.1        ws  * Read one of the FAT copies and return a pointer to the new
     91   1.5        ws  * allocated array holding our description of it.
     92   1.1        ws  */
     93   1.1        ws int readfat __P((int, struct bootblock *, int, struct fatEntry **));
     94   1.1        ws 
     95   1.1        ws /*
     96   1.1        ws  * Check two FAT copies for consistency and merge changes into the
     97   1.9       wiz  * first if necessary.
     98   1.1        ws  */
     99   1.1        ws int comparefat __P((struct bootblock *, struct fatEntry *, struct fatEntry *, int));
    100   1.1        ws 
    101   1.1        ws /*
    102   1.1        ws  * Check a FAT
    103   1.1        ws  */
    104   1.1        ws int checkfat __P((struct bootblock *, struct fatEntry *));
    105   1.1        ws 
    106   1.1        ws /*
    107   1.1        ws  * Write back FAT entries
    108   1.1        ws  */
    109   1.6  jdolecek int writefat __P((int, struct bootblock *, struct fatEntry *, int));
    110   1.1        ws 
    111   1.1        ws /*
    112   1.1        ws  * Read a directory
    113   1.1        ws  */
    114   1.5        ws int resetDosDirSection __P((struct bootblock *, struct fatEntry *));
    115   1.1        ws void finishDosDirSection __P((void));
    116   1.3        ws int handleDirTree __P((int, struct bootblock *, struct fatEntry *));
    117   1.1        ws 
    118   1.1        ws /*
    119   1.1        ws  * Cross-check routines run after everything is completely in memory
    120   1.1        ws  */
    121   1.1        ws /*
    122   1.1        ws  * Check for lost cluster chains
    123   1.1        ws  */
    124   1.3        ws int checklost __P((int, struct bootblock *, struct fatEntry *));
    125   1.1        ws /*
    126   1.1        ws  * Try to reconnect a lost cluster chain
    127   1.1        ws  */
    128   1.3        ws int reconnect __P((int, struct bootblock *, struct fatEntry *, cl_t));
    129   1.1        ws void finishlf __P((void));
    130   1.5        ws 
    131   1.1        ws /*
    132   1.1        ws  * Small helper functions
    133   1.1        ws  */
    134   1.1        ws /*
    135   1.1        ws  * Return the type of a reserved cluster as text
    136   1.1        ws  */
    137   1.8       wiz const char *rsrvdcltype __P((cl_t));
    138   1.1        ws 
    139   1.1        ws /*
    140   1.1        ws  * Clear a cluster chain in a FAT
    141   1.1        ws  */
    142   1.1        ws void clearchain __P((struct bootblock *, struct fatEntry *, cl_t));
    143   1.1        ws 
    144   1.1        ws #endif
    145