1 /* $NetBSD: check.c,v 1.8 1997/10/17 11:19:29 ws 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 1.8 1997/10/17 11:19:29 ws 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 mod |= readfat(dosfs, &boot, boot.ValidFat >= 0 ? boot.ValidFat : 0, &fat); 93 if (mod & FSFATAL) { 94 close(dosfs); 95 return 8; 96 } 97 98 if (boot.ValidFat < 0) 99 for (i = 1; i < boot.FATs; i++) { 100 struct fatEntry *currentFat; 101 102 mod |= readfat(dosfs, &boot, i, ¤tFat); 103 104 if (mod & FSFATAL) { 105 free(fat); 106 close(dosfs); 107 return 8; 108 } 109 110 mod |= comparefat(&boot, fat, currentFat, i); 111 free(currentFat); 112 if (mod & FSFATAL) { 113 free(fat); 114 close(dosfs); 115 return 8; 116 } 117 } 118 119 if (!preen) 120 printf("** Phase 2 - Check Cluster Chains\n"); 121 122 mod |= checkfat(&boot, fat); 123 if (mod & FSFATAL) { 124 free(fat); 125 close(dosfs); 126 return 8; 127 } 128 129 if (mod & FSFATMOD) 130 mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */ 131 if (mod & FSFATAL) { 132 free(fat); 133 close(dosfs); 134 return 8; 135 } 136 137 if (!preen) 138 printf("** Phase 3 - Checking Directories\n"); 139 140 mod |= resetDosDirSection(&boot, fat); 141 if (mod & FSFATAL) { 142 free(fat); 143 close(dosfs); 144 return 8; 145 } 146 147 if (mod & FSFATMOD) 148 mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */ 149 if (mod & FSFATAL) { 150 finishDosDirSection(); 151 free(fat); 152 close(dosfs); 153 return 8; 154 } 155 156 mod |= handleDirTree(dosfs, &boot, fat); 157 if (mod & FSFATAL) { 158 finishDosDirSection(); 159 free(fat); 160 close(dosfs); 161 return 8; 162 } 163 164 if (!preen) 165 printf("** Phase 4 - Checking for Lost Files\n"); 166 167 mod |= checklost(dosfs, &boot, fat); 168 if (mod & FSFATAL) { 169 finishDosDirSection(); 170 free(fat); 171 close(dosfs); 172 return 8; 173 } 174 175 if (mod & FSFATMOD) 176 mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */ 177 178 finishDosDirSection(); 179 free(fat); 180 close(dosfs); 181 if (mod & FSFATAL) 182 return 8; 183 184 if (boot.NumBad) 185 pwarn("%d files, %d free (%d clusters), %d bad (%d clusters)\n", 186 boot.NumFiles, 187 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree, 188 boot.NumBad * boot.ClusterSize / 1024, boot.NumBad); 189 else 190 pwarn("%d files, %d free (%d clusters)\n", 191 boot.NumFiles, 192 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree); 193 194 if (mod & (FSFATAL | FSERROR)) 195 return 8; 196 if (mod) { 197 pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 198 return 4; 199 } 200 return 0; 201 } 202