1 /* 2 * Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank 3 * Copyright (c) 1995 Martin Husemann 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 27 #include <sys/cdefs.h> 28 #ifndef lint 29 __RCSID("$NetBSD: check.c,v 1.10 2000/04/25 23:02:51 jdolecek Exp $"); 30 static const char rcsid[] = 31 "$FreeBSD$"; 32 #endif /* not lint */ 33 34 #include <stdlib.h> 35 #include <string.h> 36 #include <stdio.h> 37 #include <unistd.h> 38 #include <fcntl.h> 39 40 #include "ext.h" 41 #include "fsutil.h" 42 43 int 44 checkfilesys(const char *fname) 45 { 46 int dosfs; 47 struct bootblock boot; 48 struct fatEntry *fat = NULL; 49 int finish_dosdirsection=0; 50 u_int i; 51 int mod = 0; 52 int ret = 8; 53 54 rdonly = alwaysno; 55 if (!preen) 56 printf("** %s", fname); 57 58 dosfs = open(fname, rdonly ? O_RDONLY : O_RDWR, 0); 59 if (dosfs < 0 && !rdonly) { 60 dosfs = open(fname, O_RDONLY, 0); 61 if (dosfs >= 0) 62 pwarn(" (NO WRITE)\n"); 63 else if (!preen) 64 printf("\n"); 65 rdonly = 1; 66 } else if (!preen) 67 printf("\n"); 68 69 if (dosfs < 0) { 70 perror("Can't open"); 71 return 8; 72 } 73 74 if (readboot(dosfs, &boot) != FSOK) { 75 close(dosfs); 76 printf("\n"); 77 return 8; 78 } 79 80 if (skipclean && preen && checkdirty(dosfs, &boot)) { 81 printf("%s: ", fname); 82 printf("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 83 ret = 0; 84 goto out; 85 } 86 87 if (!preen) { 88 if (boot.ValidFat < 0) 89 printf("** Phase 1 - Read and Compare FATs\n"); 90 else 91 printf("** Phase 1 - Read FAT\n"); 92 } 93 94 mod |= readfat(dosfs, &boot, boot.ValidFat >= 0 ? boot.ValidFat : 0, &fat); 95 if (mod & FSFATAL) { 96 close(dosfs); 97 return 8; 98 } 99 100 if (boot.ValidFat < 0) 101 for (i = 1; i < boot.bpbFATs; i++) { 102 struct fatEntry *currentFat; 103 104 mod |= readfat(dosfs, &boot, i, ¤tFat); 105 106 if (mod & FSFATAL) 107 goto out; 108 109 mod |= comparefat(&boot, fat, currentFat, i); 110 free(currentFat); 111 if (mod & FSFATAL) 112 goto out; 113 } 114 115 if (!preen) 116 printf("** Phase 2 - Check Cluster Chains\n"); 117 118 mod |= checkfat(&boot, fat); 119 if (mod & FSFATAL) 120 goto out; 121 /* delay writing FATs */ 122 123 if (!preen) 124 printf("** Phase 3 - Checking Directories\n"); 125 126 mod |= resetDosDirSection(&boot, fat); 127 finish_dosdirsection = 1; 128 if (mod & FSFATAL) 129 goto out; 130 /* delay writing FATs */ 131 132 mod |= handleDirTree(dosfs, &boot, fat); 133 if (mod & FSFATAL) 134 goto out; 135 136 if (!preen) 137 printf("** Phase 4 - Checking for Lost Files\n"); 138 139 mod |= checklost(dosfs, &boot, fat); 140 if (mod & FSFATAL) 141 goto out; 142 143 /* now write the FATs */ 144 if (mod & FSFATMOD) { 145 if (ask(1, "Update FATs")) { 146 mod |= writefat(dosfs, &boot, fat, mod & FSFIXFAT); 147 if (mod & FSFATAL) 148 goto out; 149 } else 150 mod |= FSERROR; 151 } 152 153 if (boot.NumBad) 154 pwarn("%d files, %d free (%d clusters), %d bad (%d clusters)\n", 155 boot.NumFiles, 156 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree, 157 boot.NumBad * boot.ClusterSize / 1024, boot.NumBad); 158 else 159 pwarn("%d files, %d free (%d clusters)\n", 160 boot.NumFiles, 161 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree); 162 163 if (mod && (mod & FSERROR) == 0) { 164 if (mod & FSDIRTY) { 165 if (ask(1, "MARK FILE SYSTEM CLEAN") == 0) 166 mod &= ~FSDIRTY; 167 168 if (mod & FSDIRTY) { 169 pwarn("MARKING FILE SYSTEM CLEAN\n"); 170 mod |= writefat(dosfs, &boot, fat, 1); 171 } else { 172 pwarn("\n***** FILE SYSTEM IS LEFT MARKED AS DIRTY *****\n"); 173 mod |= FSERROR; /* file system not clean */ 174 } 175 } 176 } 177 178 if (mod & (FSFATAL | FSERROR)) 179 goto out; 180 181 ret = 0; 182 183 out: 184 if (finish_dosdirsection) 185 finishDosDirSection(); 186 free(fat); 187 close(dosfs); 188 189 if (mod & (FSFATMOD|FSDIRMOD)) 190 pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 191 192 return ret; 193 } 194