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ext.h revision 1.2 
      1 /*	$NetBSD: ext.h,v 1.2 1996/05/25 17:09:46 ws Exp $	*/
      2 
      3 /*
      4  * Copyright (C) 1995, 1996 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  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by Martin Husemann
     18  *	and Wolfgang Solfrank.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
     24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     33  */
     34 
     35 #ifndef EXT_H
     36 #define EXT_H
     37 
     38 #include <sys/types.h>
     39 
     40 #if sun
     41 #define	__P(a)	a
     42 
     43 typedef char		int8_t;
     44 typedef unsigned char	u_int8_t;
     45 typedef short		int16_t;
     46 typedef unsigned short	u_int16_t;
     47 typedef long		int32_t;
     48 typedef unsigned long	u_int32_t;
     49 #endif
     50 
     51 #include "dosfs.h"
     52 
     53 #define	LOSTDIR	"LOST.DIR"
     54 
     55 /*
     56  * Options:
     57  */
     58 extern int alwaysno;	/* assume "no" for all questions */
     59 extern int alwaysyes;	/* assume "yes" for all questions */
     60 extern int preen;	/* we are preening */
     61 extern int rdonly;	/* device is opened read only (supersedes above) */
     62 
     63 extern char *fname;	/* filesystem currently checked */
     64 
     65 /*
     66  * function declarations
     67  */
     68 void errexit __P((const char *, ...));
     69 void pfatal __P((const char *, ...));
     70 void pwarn __P((const char *, ...));
     71 int ask __P((int, const char *, ...));
     72 void perror __P((const char *));
     73 
     74 /*
     75  * Check filesystem given as arg
     76  */
     77 int checkfilesys __P((const char *));
     78 
     79 /*
     80  * Return values of various functions
     81  */
     82 #define	FSOK		0		/* Check was OK */
     83 #define	FSDIRMOD	1		/* Some directory was modified */
     84 #define	FSFATMOD	2		/* The FAT was modified */
     85 #define	FSERROR		4		/* Some unrecovered error remains */
     86 #define	FSFATAL		8		/* Some unrecoverable error occured */
     87 
     88 /*
     89  * read a boot block in a machine independend fashion and translate
     90  * it into our struct bootblock.
     91  */
     92 int readboot __P((int, struct bootblock *));
     93 
     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  */
     99 int readfat __P((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  */
    105 int comparefat __P((struct bootblock *, struct fatEntry *, struct fatEntry *, int));
    106 
    107 /*
    108  * Check a FAT
    109  */
    110 int checkfat __P((struct bootblock *, struct fatEntry *));
    111 
    112 /*
    113  * Write back FAT entries
    114  */
    115 int writefat __P((int, struct bootblock *, struct fatEntry *));
    116 
    117 /*
    118  * Read a directory
    119  */
    120 int resetDosDirSection __P((struct bootblock *));
    121 void finishDosDirSection __P((void));
    122 int readDosDirSection __P((int, struct bootblock *, struct fatEntry *, struct dosDirEntry *));
    123 
    124 /*
    125  * A stack of directories which should be examined later
    126  */
    127 extern struct dirTodoNode *pendingDirectories;
    128 
    129 /*
    130  * Cross-check routines run after everything is completely in memory
    131  */
    132 /*
    133  * Check for lost cluster chains
    134  */
    135 int checklost __P((int, struct bootblock *, struct fatEntry *, struct dosDirEntry *));
    136 /*
    137  * Try to reconnect a lost cluster chain
    138  */
    139 int reconnect __P((int, struct bootblock *, struct fatEntry *, cl_t, struct dosDirEntry *));
    140 void finishlf __P((void));
    141 
    142 /*
    143  * Small helper functions
    144  */
    145 /*
    146  * Return the type of a reserved cluster as text
    147  */
    148 char *rsrvdcltype __P((cl_t));
    149 
    150 /*
    151  * Clear a cluster chain in a FAT
    152  */
    153 void clearchain __P((struct bootblock *, struct fatEntry *, cl_t));
    154 
    155 #endif
    156