1 /* $OpenBSD: check.c,v 1.17 2015/01/16 06:39:58 deraadt 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 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/types.h> 30 #include <sys/ioctl.h> 31 #include <sys/dkio.h> 32 #include <sys/disklabel.h> 33 #include <stdlib.h> 34 #include <string.h> 35 #include <ctype.h> 36 #include <stdio.h> 37 #include <unistd.h> 38 #include <limits.h> 39 #include <fcntl.h> 40 #include <util.h> 41 42 #include "ext.h" 43 44 struct disklabel lab; 45 46 int 47 checkfilesys(const char *fname) 48 { 49 int dosfs; 50 struct bootblock boot; 51 struct fatEntry *fat = NULL; 52 char *realdev; 53 int i; 54 int mod = 0; 55 56 rdonly = alwaysno; 57 58 dosfs = opendev(fname, rdonly ? O_RDONLY : O_RDWR, 0, &realdev); 59 if (dosfs < 0 && !rdonly) { 60 dosfs = opendev(fname, O_RDONLY, 0, &realdev); 61 rdonly = 1; 62 } 63 if (dosfs < 0) { 64 xperror("Can't open"); 65 return (8); 66 } 67 68 if (!preen) { 69 printf("** %s", realdev); 70 if (strncmp(fname, realdev, PATH_MAX) != 0) 71 printf(" (%s)", fname); 72 if (rdonly) 73 printf(" (NO WRITE)"); 74 printf("\n"); 75 } 76 77 if (ioctl(dosfs, DIOCGDINFO, (char *)&lab) < 0) 78 pfatal("can't read disk label for %s\n", fname); 79 80 if (readboot(dosfs, &boot) != FSOK) { 81 (void)close(dosfs); 82 return (8); 83 } 84 85 if (!preen) { 86 if (boot.ValidFat < 0) 87 printf("** Phase 1 - Read and Compare FATs\n"); 88 else 89 printf("** Phase 1 - Read FAT\n"); 90 } 91 92 mod |= readfat(dosfs, &boot, boot.ValidFat >= 0 ? boot.ValidFat : 0, &fat); 93 if (mod & FSFATAL) { 94 (void)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 mod |= readfat(dosfs, &boot, i, ¤tFat); 102 103 if (mod & FSFATAL) { 104 free(fat); 105 (void)close(dosfs); 106 return 8; 107 } 108 109 mod |= comparefat(&boot, fat, currentFat, i); 110 free(currentFat); 111 if (mod & FSFATAL) { 112 free(fat); 113 (void)close(dosfs); 114 return (8); 115 } 116 } 117 118 if (!preen) 119 printf("** Phase 2 - Check Cluster Chains\n"); 120 121 mod |= checkfat(&boot, fat); 122 if (mod & FSFATAL) { 123 free(fat); 124 (void)close(dosfs); 125 return (8); 126 } 127 128 if (mod & FSFATMOD) 129 mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */ 130 if (mod & FSFATAL) { 131 free(fat); 132 (void)close(dosfs); 133 return (8); 134 } 135 136 if (!preen) 137 printf("** Phase 3 - Check Directories\n"); 138 139 mod |= resetDosDirSection(&boot, fat); 140 if (mod & FSFATAL) { 141 free(fat); 142 close(dosfs); 143 return 8; 144 } 145 146 if (mod & FSFATMOD) 147 mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */ 148 if (mod & FSFATAL) { 149 finishDosDirSection(); 150 free(fat); 151 (void)close(dosfs); 152 return (8); 153 } 154 155 mod |= handleDirTree(dosfs, &boot, fat); 156 if (mod & FSFATAL) { 157 finishDosDirSection(); 158 free(fat); 159 (void)close(dosfs); 160 return (8); 161 } 162 163 if (!preen) 164 printf("** Phase 4 - Check for Lost Files\n"); 165 166 mod |= checklost(dosfs, &boot, fat); 167 if (mod & FSFATAL) { 168 finishDosDirSection(); 169 free(fat); 170 (void)close(dosfs); 171 return 8; 172 } 173 174 if (mod & FSFATMOD) 175 mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */ 176 177 finishDosDirSection(); 178 free(fat); 179 (void)close(dosfs); 180 if (mod & FSFATAL) 181 return 8; 182 183 if (boot.NumBad) 184 pwarn("%d files, %d free (%d clusters), %d bad (%d clusters)\n", 185 boot.NumFiles, 186 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree, 187 boot.NumBad * boot.ClusterSize / 1024, boot.NumBad); 188 else 189 pwarn("%d files, %d free (%d clusters)\n", 190 boot.NumFiles, 191 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree); 192 193 if (mod & (FSFATAL | FSERROR)) 194 return (8); 195 if (mod) { 196 pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 197 return (4); 198 } 199 return (0); 200 } 201