1 /* $OpenBSD: check.c,v 1.11 2006/05/27 22:30:09 thib Exp $ */ 2 /* $NetBSD: check.c,v 1.8 1997/10/17 11:19:29 ws Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank 6 * Copyright (c) 1995 Martin Husemann 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Martin Husemann 19 * and Wolfgang Solfrank. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 37 #ifndef lint 38 static char rcsid[] = "$OpenBSD: check.c,v 1.11 2006/05/27 22:30:09 thib 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 50 int 51 checkfilesys(const char *fname) 52 { 53 int dosfs; 54 struct bootblock boot; 55 struct fatEntry *fat = NULL; 56 int i; 57 int mod = 0; 58 59 rdonly = alwaysno; 60 if (!preen) 61 printf("** %s", fname); 62 63 dosfs = open(fname, rdonly ? O_RDONLY : O_RDWR, 0); 64 if (dosfs < 0 && !rdonly) { 65 dosfs = open(fname, O_RDONLY, 0); 66 if (dosfs >= 0) 67 pwarn(" (NO WRITE)\n"); 68 else if (!preen) 69 printf("\n"); 70 rdonly = 1; 71 } else if (!preen) 72 printf("\n"); 73 74 if (dosfs < 0) { 75 xperror("Can't open"); 76 return (8); 77 } 78 79 if (readboot(dosfs, &boot) != FSOK) { 80 (void)close(dosfs); 81 return (8); 82 } 83 84 if (!preen) { 85 if (boot.ValidFat < 0) 86 printf("** Phase 1 - Read and Compare FATs\n"); 87 else 88 printf("** Phase 1 - Read FAT\n"); 89 } 90 91 mod |= readfat(dosfs, &boot, boot.ValidFat >= 0 ? boot.ValidFat : 0, &fat); 92 if (mod & FSFATAL) { 93 (void)close(dosfs); 94 return 8; 95 } 96 97 if (boot.ValidFat < 0) 98 for (i = 1; i < boot.FATs; i++) { 99 struct fatEntry *currentFat; 100 mod |= readfat(dosfs, &boot, i, ¤tFat); 101 102 if (mod & FSFATAL) { 103 free(fat); 104 (void)close(dosfs); 105 return 8; 106 } 107 108 mod |= comparefat(&boot, fat, currentFat, i); 109 free(currentFat); 110 if (mod & FSFATAL) { 111 free(fat); 112 (void)close(dosfs); 113 return (8); 114 } 115 } 116 117 if (!preen) 118 printf("** Phase 2 - Check Cluster Chains\n"); 119 120 mod |= checkfat(&boot, fat); 121 if (mod & FSFATAL) { 122 free(fat); 123 (void)close(dosfs); 124 return (8); 125 } 126 127 if (mod & FSFATMOD) 128 mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */ 129 if (mod & FSFATAL) { 130 free(fat); 131 (void)close(dosfs); 132 return (8); 133 } 134 135 if (!preen) 136 printf("** Phase 3 - Check Directories\n"); 137 138 mod |= resetDosDirSection(&boot, fat); 139 if (mod & FSFATAL) { 140 free(fat); 141 close(dosfs); 142 return 8; 143 } 144 145 if (mod & FSFATMOD) 146 mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */ 147 if (mod & FSFATAL) { 148 finishDosDirSection(); 149 free(fat); 150 (void)close(dosfs); 151 return (8); 152 } 153 154 mod |= handleDirTree(dosfs, &boot, fat); 155 if (mod & FSFATAL) { 156 finishDosDirSection(); 157 free(fat); 158 (void)close(dosfs); 159 return (8); 160 } 161 162 if (!preen) 163 printf("** Phase 4 - Check for Lost Files\n"); 164 165 mod |= checklost(dosfs, &boot, fat); 166 if (mod & FSFATAL) { 167 finishDosDirSection(); 168 free(fat); 169 (void)close(dosfs); 170 return 8; 171 } 172 173 if (mod & FSFATMOD) 174 mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */ 175 176 finishDosDirSection(); 177 free(fat); 178 (void)close(dosfs); 179 if (mod & FSFATAL) 180 return 8; 181 182 if (boot.NumBad) 183 pwarn("%d files, %d free (%d clusters), %d bad (%d clusters)\n", 184 boot.NumFiles, 185 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree, 186 boot.NumBad * boot.ClusterSize / 1024, boot.NumBad); 187 else 188 pwarn("%d files, %d free (%d clusters)\n", 189 boot.NumFiles, 190 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree); 191 192 if (mod & (FSFATAL | FSERROR)) 193 return (8); 194 if (mod) { 195 pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 196 return (4); 197 } 198 return (0); 199 } 200