1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 29 #include <sys/cdefs.h> 30 #ifndef lint 31 __RCSID("$NetBSD: check.c,v 1.14 2006/06/05 16:51:18 christos Exp $"); 32 static const char rcsid[] = 33 "$FreeBSD$"; 34 #endif /* not lint */ 35 36 #include <stdlib.h> 37 #include <string.h> 38 #include <stdio.h> 39 #include <unistd.h> 40 #include <fcntl.h> 41 42 #include "ext.h" 43 #include "fsutil.h" 44 45 int 46 checkfilesys(const char *fname) 47 { 48 int dosfs; 49 struct bootblock boot; 50 struct fatEntry *fat = NULL; 51 int finish_dosdirsection=0; 52 u_int i; 53 int mod = 0; 54 int ret = 8; 55 56 rdonly = alwaysno; 57 if (!preen) 58 printf("** %s", fname); 59 60 dosfs = open(fname, rdonly ? O_RDONLY : O_RDWR, 0); 61 if (dosfs < 0 && !rdonly) { 62 dosfs = open(fname, O_RDONLY, 0); 63 if (dosfs >= 0) 64 pwarn(" (NO WRITE)\n"); 65 else if (!preen) 66 printf("\n"); 67 rdonly = 1; 68 } else if (!preen) 69 printf("\n"); 70 71 if (dosfs < 0) { 72 perr("Can't open `%s'", fname); 73 printf("\n"); 74 return 8; 75 } 76 77 if (readboot(dosfs, &boot) == FSFATAL) { 78 close(dosfs); 79 printf("\n"); 80 return 8; 81 } 82 83 if (skipclean && preen && checkdirty(dosfs, &boot)) { 84 printf("%s: ", fname); 85 printf("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 86 ret = 0; 87 goto out; 88 } 89 90 if (!preen) { 91 if (boot.ValidFat < 0) 92 printf("** Phase 1 - Read and Compare FATs\n"); 93 else 94 printf("** Phase 1 - Read FAT\n"); 95 } 96 97 mod |= readfat(dosfs, &boot, boot.ValidFat >= 0 ? boot.ValidFat : 0, &fat); 98 if (mod & FSFATAL) { 99 close(dosfs); 100 return 8; 101 } 102 103 if (boot.ValidFat < 0) 104 for (i = 1; i < boot.bpbFATs; i++) { 105 struct fatEntry *currentFat; 106 107 mod |= readfat(dosfs, &boot, i, ¤tFat); 108 109 if (mod & FSFATAL) 110 goto out; 111 112 mod |= comparefat(&boot, fat, currentFat, i); 113 free(currentFat); 114 if (mod & FSFATAL) 115 goto out; 116 } 117 118 if (!preen) 119 printf("** Phase 2 - Check Cluster Chains\n"); 120 121 mod |= checkfat(&boot, fat); 122 if (mod & FSFATAL) 123 goto out; 124 /* delay writing FATs */ 125 126 if (!preen) 127 printf("** Phase 3 - Checking Directories\n"); 128 129 mod |= resetDosDirSection(&boot, fat); 130 finish_dosdirsection = 1; 131 if (mod & FSFATAL) 132 goto out; 133 /* delay writing FATs */ 134 135 mod |= handleDirTree(dosfs, &boot, fat); 136 if (mod & FSFATAL) 137 goto out; 138 139 if (!preen) 140 printf("** Phase 4 - Checking for Lost Files\n"); 141 142 mod |= checklost(dosfs, &boot, fat); 143 if (mod & FSFATAL) 144 goto out; 145 146 /* now write the FATs */ 147 if (mod & (FSFATMOD|FSFIXFAT)) { 148 if (ask(1, "Update FATs")) { 149 mod |= writefat(dosfs, &boot, fat, mod & FSFIXFAT); 150 if (mod & FSFATAL) 151 goto out; 152 } else 153 mod |= FSERROR; 154 } 155 156 if (boot.NumBad) 157 pwarn("%d files, %d free (%d clusters), %d bad (%d clusters)\n", 158 boot.NumFiles, 159 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree, 160 boot.NumBad * boot.ClusterSize / 1024, boot.NumBad); 161 else 162 pwarn("%d files, %d free (%d clusters)\n", 163 boot.NumFiles, 164 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree); 165 166 if (mod && (mod & FSERROR) == 0) { 167 if (mod & FSDIRTY) { 168 if (ask(1, "MARK FILE SYSTEM CLEAN") == 0) 169 mod &= ~FSDIRTY; 170 171 if (mod & FSDIRTY) { 172 pwarn("MARKING FILE SYSTEM CLEAN\n"); 173 mod |= writefat(dosfs, &boot, fat, 1); 174 } else { 175 pwarn("\n***** FILE SYSTEM IS LEFT MARKED AS DIRTY *****\n"); 176 mod |= FSERROR; /* file system not clean */ 177 } 178 } 179 } 180 181 if (mod & (FSFATAL | FSERROR)) 182 goto out; 183 184 ret = 0; 185 186 out: 187 if (finish_dosdirsection) 188 finishDosDirSection(); 189 free(fat); 190 close(dosfs); 191 192 if (mod & (FSFATMOD|FSDIRMOD)) 193 pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 194 195 return ret; 196 } 197