1 /* $NetBSD: check.c,v 1.12 2001/04/06 16:52:41 wiz 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Martin Husemann 18 * and Wolfgang Solfrank. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __RCSID("$NetBSD: check.c,v 1.12 2001/04/06 16:52:41 wiz Exp $"); 39 #endif /* not lint */ 40 41 #include <stdlib.h> 42 #include <string.h> 43 #include <ctype.h> 44 #include <stdio.h> 45 #include <unistd.h> 46 #include <fcntl.h> 47 48 #include "ext.h" 49 #include "fsutil.h" 50 51 int 52 checkfilesys(filename) 53 const char *filename; 54 { 55 int dosfs; 56 struct bootblock boot; 57 struct fatEntry *fat = NULL; 58 int i, finish_dosdirsection=0; 59 int mod = 0; 60 int ret = 8; 61 62 rdonly = alwaysno; 63 if (!preen) 64 printf("** %s", filename); 65 66 dosfs = open(filename, rdonly ? O_RDONLY : O_RDWR, 0); 67 if (dosfs < 0 && !rdonly) { 68 dosfs = open(filename, O_RDONLY, 0); 69 if (dosfs >= 0) 70 pwarn(" (NO WRITE)\n"); 71 else if (!preen) 72 printf("\n"); 73 rdonly = 1; 74 } else if (!preen) 75 printf("\n"); 76 77 if (dosfs < 0) { 78 perror("Can't open"); 79 return 8; 80 } 81 82 if (readboot(dosfs, &boot) != FSOK) { 83 close(dosfs); 84 printf("\n"); 85 return 8; 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.FATs; 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) { 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