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
checkfilesys(const char * fname)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