1/* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. Please obtain a copy of the License at 10 * http://www.opensource.apple.com/apsl/ and read it before using this 11 * file. 12 * 13 * The Original Code and all software distributed under the License are 14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18 * Please see the License for the specific language governing rights and 19 * limitations under the License. 20 * 21 * @APPLE_LICENSE_HEADER_END@ 22 */ 23/* 24 * Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank 25 * Copyright (c) 1995 Martin Husemann 26 * 27 * Redistribution and use in source and binary forms, with or without 28 * modification, are permitted provided that the following conditions 29 * are met: 30 * 1. Redistributions of source code must retain the above copyright 31 * notice, this list of conditions and the following disclaimer. 32 * 2. Redistributions in binary form must reproduce the above copyright 33 * notice, this list of conditions and the following disclaimer in the 34 * documentation and/or other materials provided with the distribution. 35 * 3. All advertising materials mentioning features or use of this software 36 * must display the following acknowledgement: 37 * This product includes software developed by Martin Husemann 38 * and Wolfgang Solfrank. 39 * 4. Neither the name of the University nor the names of its contributors 40 * may be used to endorse or promote products derived from this software 41 * without specific prior written permission. 42 * 43 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 44 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 45 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 46 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 47 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 48 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 49 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 50 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 51 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 52 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 53 */ 54 55#ifndef EXT_H 56#define EXT_H 57 58#include <sys/types.h> 59 60#include "dosfs.h" 61 62#define LOSTDIR "LOST.DIR" 63 64/* 65 * Options: 66 */ 67extern int alwaysno; /* assume "no" for all questions */ 68extern int alwaysyes; /* assume "yes" for all questions */ 69extern int preen; /* we are preening */ 70extern int rdonly; /* device is opened read only (supersedes above) */ 71extern int quick; /* set to quickly check if volume is dirty */ 72extern int quiet; /* set to suppress most messages */ 73extern size_t maxmem; /* If non-zero, limit major allocations to this many bytes */ 74 75extern char *fname; /* filesystem currently checked */ 76 77extern struct dosDirEntry *rootDir; 78 79/* 80 * function declarations 81 */ 82int ask __P((int, const char *, ...)); 83 84/* 85 * Check filesystem given as arg 86 */ 87int checkfilesys __P((const char *)); 88 89/* 90 * Return values of various functions 91 */ 92#define FSOK 0 /* Check was OK */ 93#define FSBOOTMOD 1 /* Boot block was modified */ 94#define FSDIRMOD 2 /* Some directory was modified */ 95#define FSFATMOD 4 /* The FAT was modified */ 96#define FSERROR 8 /* Some unrecovered error remains */ 97#define FSFATAL 16 /* Some unrecoverable error occured */ 98#define FSDIRTY 32 /* File system is dirty */ 99#define FSFIXFAT 64 /* Fix file system FAT */ 100 101/* 102 * read a boot block in a machine independend fashion and translate 103 * it into our struct bootblock. 104 */ 105int readboot __P((int, struct bootblock *)); 106 107/* 108 * Correct the FSInfo block. 109 */ 110int writefsinfo __P((int, struct bootblock *)); 111 112/* 113 * Read a directory 114 */ 115int resetDosDirSection(struct bootblock *boot); 116void finishDosDirSection __P((void)); 117int handleDirTree(int, struct bootblock *boot); 118 119/* 120 * Small helper functions 121 */ 122/* 123 * Return the type of a reserved cluster as text 124 */ 125char *rsrvdcltype __P((cl_t)); 126 127/* 128 * Routines to read/write the FAT 129 */ 130int fat_init(int fs, struct bootblock *boot); 131void fat_uninit(void); 132extern cl_t (*fat_get)(cl_t cluster); 133extern int (*fat_set)(cl_t cluster, cl_t value); 134int fat_free_unused(void); 135int fat_flush(void); 136/* 137 * Determine whether a volume is dirty, without reading the entire FAT. 138 */ 139int isdirty(int fs, struct bootblock *boot, int fat); 140/* 141 * Mark the volume "clean." 142 */ 143int fat_mark_clean(void); 144 145 146/* 147 * Routines to track which clusters are in use (referenced by some directory entry). 148 */ 149/* Returns error if memory cannot be allocated */ 150int initUseMap(struct bootblock *boot); 151void freeUseMap(void); 152/* Returns non-zero if block is marked allocated */ 153int isUsed(cl_t cluster); 154/* Returns non-zero if cluster already marked allocated */ 155int markUsed(cl_t cluster); 156/* Returns non-zero if cluster already marked free */ 157int markFree(cl_t cluster); 158 159#endif 160