1 /* $NetBSD: check.c,v 1.19 2014/07/10 21:06:20 christos Exp $ */ 2 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 1.19 2014/07/10 21:06:20 christos Exp $"); 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 #include "exitvalues.h" 43 44 int 45 checkfilesys(const char *filename) 46 { 47 int dosfs; 48 struct bootblock boot; 49 struct fatEntry *fat = NULL; 50 int finish_dosdirsection=0; 51 u_int i; 52 int mod = 0; 53 int ret = FSCK_EXIT_CHECK_FAILED; 54 55 rdonly = alwaysno; 56 if (!preen) 57 printf("** %s", filename); 58 59 dosfs = open(filename, rdonly ? O_RDONLY : O_RDWR, 0); 60 if (dosfs < 0 && !rdonly) { 61 dosfs = open(filename, O_RDONLY, 0); 62 if (dosfs >= 0) 63 pwarn(" (NO WRITE)\n"); 64 else if (!preen) 65 printf("\n"); 66 rdonly = 1; 67 } else if (!preen) 68 printf("\n"); 69 70 if (dosfs < 0) { 71 perr("Can't open `%s'", filename); 72 return FSCK_EXIT_CHECK_FAILED; 73 } 74 75 if (readboot(dosfs, &boot) != FSOK) { 76 close(dosfs); 77 printf("\n"); 78 return FSCK_EXIT_CHECK_FAILED; 79 } 80 81 if (!preen) { 82 if (boot.ValidFat < 0) 83 printf("** Phase 1 - Read and Compare FATs\n"); 84 else 85 printf("** Phase 1 - Read FAT\n"); 86 } 87 88 mod |= readfat(dosfs, &boot, boot.ValidFat >= 0 ? boot.ValidFat : 0, &fat); 89 if (mod & FSFATAL) { 90 close(dosfs); 91 return FSCK_EXIT_CHECK_FAILED; 92 } 93 94 if (boot.ValidFat < 0) 95 for (i = 1; i < boot.FATs; i++) { 96 struct fatEntry *currentFat; 97 98 mod |= readfat(dosfs, &boot, i, ¤tFat); 99 100 if (mod & FSFATAL) 101 goto out; 102 103 mod |= comparefat(&boot, fat, currentFat, i); 104 free(currentFat); 105 if (mod & FSFATAL) 106 goto out; 107 } 108 109 if (!preen) 110 printf("** Phase 2 - Check Cluster Chains\n"); 111 112 mod |= checkfat(&boot, fat); 113 if (mod & FSFATAL) 114 goto out; 115 /* delay writing FATs */ 116 117 if (!preen) 118 printf("** Phase 3 - Checking Directories\n"); 119 120 mod |= resetDosDirSection(&boot, fat); 121 finish_dosdirsection = 1; 122 if (mod & FSFATAL) 123 goto out; 124 /* delay writing FATs */ 125 126 mod |= handleDirTree(dosfs, &boot, fat); 127 if (mod & FSFATAL) 128 goto out; 129 130 if (!preen) 131 printf("** Phase 4 - Checking for Lost Files\n"); 132 133 mod |= checklost(dosfs, &boot, fat); 134 if (mod & FSFATAL) 135 goto out; 136 137 /* now write the FATs */ 138 if (mod & (FSFATMOD|FSFIXFAT)) { 139 if (ask(1, "Update FATs")) { 140 mod |= writefat(dosfs, &boot, fat, mod & FSFIXFAT); 141 if (mod & FSFATAL) 142 goto out; 143 } else 144 mod |= FSERROR; 145 } 146 147 if (boot.NumBad) 148 pwarn("%d files, %d free (%d clusters), %d bad (%d clusters)\n", 149 boot.NumFiles, 150 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree, 151 boot.NumBad * boot.ClusterSize / 1024, boot.NumBad); 152 else 153 pwarn("%d files, %d free (%d clusters)\n", 154 boot.NumFiles, 155 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree); 156 157 if (mod && (mod & FSERROR) == 0) { 158 if (mod & FSDIRTY) { 159 if (ask(1, "MARK FILE SYSTEM CLEAN") == 0) 160 mod &= ~FSDIRTY; 161 162 if (mod & FSDIRTY) { 163 pwarn("MARKING FILE SYSTEM CLEAN\n"); 164 mod |= writefat(dosfs, &boot, fat, 1); 165 } else { 166 pwarn("\n***** FILE SYSTEM IS LEFT MARKED AS DIRTY *****\n"); 167 mod |= FSERROR; /* file system not clean */ 168 } 169 } 170 } 171 172 if (mod & (FSFATAL | FSERROR)) 173 goto out; 174 175 ret = FSCK_EXIT_OK; 176 177 out: 178 if (finish_dosdirsection) 179 finishDosDirSection(); 180 free(fat); 181 close(dosfs); 182 183 if (mod & (FSFATMOD|FSDIRMOD)) 184 pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 185 186 return ret; 187 } 188