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 1.14 2006/06/05 16:51:18 christos 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 perr("Can't open `%s'", fname); 71 printf("\n"); 72 return 8; 73 } 74 75 if (readboot(dosfs, &boot) != FSOK) { 76 close(dosfs); 77 printf("\n"); 78 return 8; 79 } 80 81 if (skipclean && preen && checkdirty(dosfs, &boot)) { 82 printf("%s: ", fname); 83 printf("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 84 ret = 0; 85 goto out; 86 } 87 88 if (!preen) { 89 if (boot.ValidFat < 0) 90 printf("** Phase 1 - Read and Compare FATs\n"); 91 else 92 printf("** Phase 1 - Read FAT\n"); 93 } 94 95 mod |= readfat(dosfs, &boot, boot.ValidFat >= 0 ? boot.ValidFat : 0, &fat); 96 if (mod & FSFATAL) { 97 close(dosfs); 98 return 8; 99 } 100 101 if (boot.ValidFat < 0) 102 for (i = 1; i < boot.bpbFATs; i++) { 103 struct fatEntry *currentFat; 104 105 mod |= readfat(dosfs, &boot, i, ¤tFat); 106 107 if (mod & FSFATAL) 108 goto out; 109 110 mod |= comparefat(&boot, fat, currentFat, i); 111 free(currentFat); 112 if (mod & FSFATAL) 113 goto out; 114 } 115 116 if (!preen) 117 printf("** Phase 2 - Check Cluster Chains\n"); 118 119 mod |= checkfat(&boot, fat); 120 if (mod & FSFATAL) 121 goto out; 122 /* delay writing FATs */ 123 124 if (!preen) 125 printf("** Phase 3 - Checking Directories\n"); 126 127 mod |= resetDosDirSection(&boot, fat); 128 finish_dosdirsection = 1; 129 if (mod & FSFATAL) 130 goto out; 131 /* delay writing FATs */ 132 133 mod |= handleDirTree(dosfs, &boot, fat); 134 if (mod & FSFATAL) 135 goto out; 136 137 if (!preen) 138 printf("** Phase 4 - Checking for Lost Files\n"); 139 140 mod |= checklost(dosfs, &boot, fat); 141 if (mod & FSFATAL) 142 goto out; 143 144 /* now write the FATs */ 145 if (mod & (FSFATMOD|FSFIXFAT)) { 146 if (ask(1, "Update FATs")) { 147 mod |= writefat(dosfs, &boot, fat, mod & FSFIXFAT); 148 if (mod & FSFATAL) 149 goto out; 150 } else 151 mod |= FSERROR; 152 } 153 154 if (boot.NumBad) 155 pwarn("%d files, %d free (%d clusters), %d bad (%d clusters)\n", 156 boot.NumFiles, 157 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree, 158 boot.NumBad * boot.ClusterSize / 1024, boot.NumBad); 159 else 160 pwarn("%d files, %d free (%d clusters)\n", 161 boot.NumFiles, 162 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree); 163 164 if (mod && (mod & FSERROR) == 0) { 165 if (mod & FSDIRTY) { 166 if (ask(1, "MARK FILE SYSTEM CLEAN") == 0) 167 mod &= ~FSDIRTY; 168 169 if (mod & FSDIRTY) { 170 pwarn("MARKING FILE SYSTEM CLEAN\n"); 171 mod |= writefat(dosfs, &boot, fat, 1); 172 } else { 173 pwarn("\n***** FILE SYSTEM IS LEFT MARKED AS DIRTY *****\n"); 174 mod |= FSERROR; /* file system not clean */ 175 } 176 } 177 } 178 179 if (mod & (FSFATAL | FSERROR)) 180 goto out; 181 182 ret = 0; 183 184 out: 185 if (finish_dosdirsection) 186 finishDosDirSection(); 187 free(fat); 188 close(dosfs); 189 190 if (mod & (FSFATMOD|FSDIRMOD)) 191 pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 192 193 return ret; 194 } 195