2 * Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
3 * Copyright (c) 1995 Martin Husemann
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Martin Husemann
16 * and Wolfgang Solfrank.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45 * If the FAT > this size then skip comparing, lest we risk
46 * OOMing the framework. in the future we need to just re-write
47 * this whole thing and optimize for less memory
49 #define FAT_COMPARE_MAX_KB 4096
52 checkfilesys(const char *fname)
55 struct bootblock boot;
56 struct fatEntry *fat = NULL;
57 int i, finish_dosdirsection=0;
61 int skip_fat_compare = 0;
65 printf("** %s", fname);
67 dosfs = open(fname, rdonly ? O_RDONLY : O_RDWR, 0);
68 if (dosfs < 0 && !rdonly) {
69 dosfs = open(fname, O_RDONLY, 0);
71 pwarn(" (NO WRITE)\n");
83 if (readboot(dosfs, &boot) == FSFATAL) {
89 if (skipclean && preen && checkdirty(dosfs, &boot)) {
90 printf("%s: ", fname);
91 printf("FILESYSTEM CLEAN; SKIPPING CHECKS\n");
96 if (((boot.FATsecs * boot.BytesPerSec) / 1024) > FAT_COMPARE_MAX_KB)
100 if (skip_fat_compare)
101 printf("** Phase 1 - Read FAT (compare skipped)\n");
102 else if (boot.ValidFat < 0)
103 printf("** Phase 1 - Read and Compare FATs\n");
105 printf("** Phase 1 - Read FAT\n");
108 mod |= readfat(dosfs, &boot, boot.ValidFat >= 0 ? boot.ValidFat : 0, &fat);
110 printf("Fatal error during readfat()\n");
117 if (!skip_fat_compare && boot.ValidFat < 0)
118 for (i = 1; i < (int)boot.FATs; i++) {
119 struct fatEntry *currentFat;
121 mod |= readfat(dosfs, &boot, i, ¤tFat);
124 printf("Fatal error during readfat() for comparison\n");
128 mod |= comparefat(&boot, fat, currentFat, i);
131 printf("Fatal error during FAT comparison\n");
137 printf("** Phase 2 - Check Cluster Chains\n");
139 mod |= checkfat(&boot, fat);
141 printf("Fatal error during FAT check\n");
144 /* delay writing FATs */
147 printf("** Phase 3 - Checking Directories\n");
149 mod |= resetDosDirSection(&boot, fat);
150 finish_dosdirsection = 1;
152 printf("Fatal error during resetDosDirSection()\n");
155 /* delay writing FATs */
157 mod |= handleDirTree(dosfs, &boot, fat);
162 printf("** Phase 4 - Checking for Lost Files\n");
164 mod |= checklost(dosfs, &boot, fat);
168 /* now write the FATs */
169 if (mod & FSFATMOD) {
170 if (ask(1, "Update FATs")) {
171 mod |= writefat(dosfs, &boot, fat, mod & FSFIXFAT);
173 printf("Fatal error during writefat()\n");
181 pwarn("%d files, %d free (%d clusters), %d bad (%d clusters)\n",
183 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree,
184 boot.NumBad * boot.ClusterSize / 1024, boot.NumBad);
186 pwarn("%d files, %d free (%d clusters)\n",
188 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree);
190 if (mod && (mod & FSERROR) == 0) {
192 if (ask(1, "MARK FILE SYSTEM CLEAN") == 0)
196 pwarn("MARKING FILE SYSTEM CLEAN\n");
197 mod |= writefat(dosfs, &boot, fat, 1);
199 pwarn("\n***** FILE SYSTEM IS LEFT MARKED AS DIRTY *****\n");
200 mod |= FSERROR; /* file system not clean */
205 if (mod & (FSFATAL | FSERROR))
211 if (finish_dosdirsection)
212 finishDosDirSection();
216 if (mod & (FSFATMOD|FSDIRMOD)) {
217 pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n");