1 /* $NetBSD: check.c,v 1.9 1998/08/25 19:18:15 ross Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997 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 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __RCSID("$NetBSD: check.c,v 1.9 1998/08/25 19:18:15 ross Exp $"); 39 #endif /* not lint */ 40 41 #include <stdlib.h> 42 #include <string.h> 43 #include <ctype.h> 44 #include <stdio.h> 45 #include <unistd.h> 46 #include <fcntl.h> 47 48 #include "ext.h" 49 #include "fsutil.h" 50 51 int 52 checkfilesys(fname) 53 const char *fname; 54 { 55 int dosfs; 56 struct bootblock boot; 57 struct fatEntry *fat = NULL; 58 int i; 59 int mod = 0; 60 61 rdonly = alwaysno; 62 if (!preen) 63 printf("** %s", fname); 64 65 dosfs = open(fname, rdonly ? O_RDONLY : O_RDWR, 0); 66 if (dosfs < 0 && !rdonly) { 67 dosfs = open(fname, O_RDONLY, 0); 68 if (dosfs >= 0) 69 pwarn(" (NO WRITE)\n"); 70 else if (!preen) 71 printf("\n"); 72 rdonly = 1; 73 } else if (!preen) 74 printf("\n"); 75 76 if (dosfs < 0) { 77 perror("Can't open"); 78 return 8; 79 } 80 81 if (readboot(dosfs, &boot) != FSOK) { 82 close(dosfs); 83 return 8; 84 } 85 86 if (!preen) { 87 if (boot.ValidFat < 0) 88 printf("** Phase 1 - Read and Compare FATs\n"); 89 else 90 printf("** Phase 1 - Read FAT\n"); 91 } 92 93 mod |= readfat(dosfs, &boot, boot.ValidFat >= 0 ? boot.ValidFat : 0, &fat); 94 if (mod & FSFATAL) { 95 close(dosfs); 96 return 8; 97 } 98 99 if (boot.ValidFat < 0) 100 for (i = 1; i < boot.FATs; i++) { 101 struct fatEntry *currentFat; 102 103 mod |= readfat(dosfs, &boot, i, ¤tFat); 104 105 if (mod & FSFATAL) { 106 free(fat); 107 close(dosfs); 108 return 8; 109 } 110 111 mod |= comparefat(&boot, fat, currentFat, i); 112 free(currentFat); 113 if (mod & FSFATAL) { 114 free(fat); 115 close(dosfs); 116 return 8; 117 } 118 } 119 120 if (!preen) 121 printf("** Phase 2 - Check Cluster Chains\n"); 122 123 mod |= checkfat(&boot, fat); 124 if (mod & FSFATAL) { 125 free(fat); 126 close(dosfs); 127 return 8; 128 } 129 130 if (mod & FSFATMOD) 131 mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */ 132 if (mod & FSFATAL) { 133 free(fat); 134 close(dosfs); 135 return 8; 136 } 137 138 if (!preen) 139 printf("** Phase 3 - Checking Directories\n"); 140 141 mod |= resetDosDirSection(&boot, fat); 142 if (mod & FSFATAL) { 143 free(fat); 144 close(dosfs); 145 return 8; 146 } 147 148 if (mod & FSFATMOD) 149 mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */ 150 if (mod & FSFATAL) { 151 finishDosDirSection(); 152 free(fat); 153 close(dosfs); 154 return 8; 155 } 156 157 mod |= handleDirTree(dosfs, &boot, fat); 158 if (mod & FSFATAL) { 159 finishDosDirSection(); 160 free(fat); 161 close(dosfs); 162 return 8; 163 } 164 165 if (!preen) 166 printf("** Phase 4 - Checking for Lost Files\n"); 167 168 mod |= checklost(dosfs, &boot, fat); 169 if (mod & FSFATAL) { 170 finishDosDirSection(); 171 free(fat); 172 close(dosfs); 173 return 8; 174 } 175 176 if (mod & FSFATMOD) 177 mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */ 178 179 finishDosDirSection(); 180 free(fat); 181 close(dosfs); 182 if (mod & FSFATAL) 183 return 8; 184 185 if (boot.NumBad) 186 pwarn("%d files, %d free (%d clusters), %d bad (%d clusters)\n", 187 boot.NumFiles, 188 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree, 189 boot.NumBad * boot.ClusterSize / 1024, boot.NumBad); 190 else 191 pwarn("%d files, %d free (%d clusters)\n", 192 boot.NumFiles, 193 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree); 194 195 if (mod & (FSFATAL | FSERROR)) 196 return 8; 197 if (mod) { 198 pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 199 return 4; 200 } 201 return 0; 202 } 203