1 /* $NetBSD: check.c,v 1.3 1996/05/28 19:51:11 ws Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996 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 #ifndef lint 37 static char rcsid[] = "$NetBSD: check.c,v 1.3 1996/05/28 19:51:11 ws Exp $"; 38 #endif /* not lint */ 39 40 #include <stdlib.h> 41 #include <string.h> 42 #include <ctype.h> 43 #include <stdio.h> 44 #include <unistd.h> 45 #include <fcntl.h> 46 47 #include "ext.h" 48 49 int 50 checkfilesys(fname) 51 const char *fname; 52 { 53 int dosfs; 54 struct bootblock boot; 55 struct fatEntry * fat = NULL; 56 int i; 57 int mod = 0; 58 59 rdonly = alwaysno; 60 if (!preen) 61 printf("** %s", fname); 62 63 dosfs = open(fname, rdonly ? O_RDONLY : O_RDWR, 0); 64 if (dosfs < 0 && !rdonly) { 65 dosfs = open(fname, O_RDONLY, 0); 66 if (dosfs >= 0) 67 pwarn(" (NO WRITE)\n"); 68 else if (!preen) 69 printf("\n"); 70 rdonly = 1; 71 } else if (!preen) 72 printf("\n"); 73 74 if (dosfs < 0) { 75 perror("Can't open"); 76 return 8; 77 } 78 79 if (readboot(dosfs, &boot) != FSOK) { 80 close(dosfs); 81 return 8; 82 } 83 84 if (!preen) 85 printf("** Phase 1 - Read and Compare FATs\n"); 86 87 for (i = 0; i < boot.FATs; i++) { 88 struct fatEntry *currentFat; 89 90 mod |= readfat(dosfs, &boot, i, ¤tFat); 91 92 if (mod & FSFATAL) { 93 if (fat) 94 free(fat); 95 close(dosfs); 96 return 8; 97 } 98 99 if (fat == NULL) 100 fat = currentFat; 101 else { 102 mod |= comparefat(&boot, fat, currentFat, i + 1); 103 free(currentFat); 104 if (mod & FSFATAL) { 105 free(fat); 106 close(dosfs); 107 return 8; 108 } 109 } 110 } 111 112 if (!preen) 113 printf("** Phase 2 - Check Cluster Chains\n"); 114 115 mod |= checkfat(&boot, fat); 116 if (mod & FSFATAL) { 117 free(fat); 118 close(dosfs); 119 return 8; 120 } 121 122 if (mod & FSFATMOD) 123 mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */ 124 if (mod & FSFATAL) { 125 free(fat); 126 close(dosfs); 127 return 8; 128 } 129 130 if (!preen) 131 printf("** Phase 3 - Checking Directories\n"); 132 133 if (resetDosDirSection(&boot) & FSFATAL) { 134 free(fat); 135 close(dosfs); 136 return 8; 137 } 138 139 mod |= handleDirTree(dosfs, &boot, fat); 140 if (mod & FSFATAL) { 141 finishDosDirSection(); 142 free(fat); 143 close(dosfs); 144 return 8; 145 } 146 147 if (!preen) 148 printf("** Phase 4 - Checking for Lost Files\n"); 149 150 mod |= checklost(dosfs, &boot, fat); 151 152 finishDosDirSection(); 153 free(fat); 154 close(dosfs); 155 156 pwarn("%d files, %d free (%d clusters)\n", 157 boot.NumFiles, boot.NumFree * boot.ClusterSize / 1024, 158 boot.NumFree); 159 if (mod & (FSFATAL | FSERROR)) 160 return 8; 161 if (mod) { 162 pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n"); 163 return 4; 164 } 165 return 0; 166 } 167