1 /* $NetBSD: check.c,v 1.20 2022/08/28 10:20:25 mlelstv 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 1.20 2022/08/28 10:20:25 mlelstv 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
checkfilesys(const char * filename)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 mod = readboot(dosfs, &boot);
76 if (mod & FSFATAL) {
77 close(dosfs);
78 printf("\n");
79 return FSCK_EXIT_CHECK_FAILED;
80 }
81
82 if (!preen) {
83 if (boot.ValidFat < 0)
84 printf("** Phase 1 - Read and Compare FATs\n");
85 else
86 printf("** Phase 1 - Read FAT\n");
87 }
88
89 mod |= readfat(dosfs, &boot, boot.ValidFat >= 0 ? boot.ValidFat : 0, &fat);
90 if (mod & FSFATAL) {
91 close(dosfs);
92 return FSCK_EXIT_CHECK_FAILED;
93 }
94
95 if (boot.ValidFat < 0)
96 for (i = 1; i < boot.FATs; i++) {
97 struct fatEntry *currentFat;
98
99 mod |= readfat(dosfs, &boot, i, ¤tFat);
100
101 if (mod & FSFATAL)
102 goto out;
103
104 mod |= comparefat(&boot, fat, currentFat, i);
105 free(currentFat);
106 if (mod & FSFATAL)
107 goto out;
108 }
109
110 if (!preen)
111 printf("** Phase 2 - Check Cluster Chains\n");
112
113 mod |= checkfat(&boot, fat);
114 if (mod & FSFATAL)
115 goto out;
116 /* delay writing FATs */
117
118 if (!preen)
119 printf("** Phase 3 - Checking Directories\n");
120
121 mod |= resetDosDirSection(&boot, fat);
122 finish_dosdirsection = 1;
123 if (mod & FSFATAL)
124 goto out;
125 /* delay writing FATs */
126
127 mod |= handleDirTree(dosfs, &boot, fat);
128 if (mod & FSFATAL)
129 goto out;
130
131 if (!preen)
132 printf("** Phase 4 - Checking for Lost Files\n");
133
134 mod |= checklost(dosfs, &boot, fat);
135 if (mod & FSFATAL)
136 goto out;
137
138 /* now write the FATs */
139 if (mod & (FSFATMOD|FSFIXFAT)) {
140 if (ask(1, "Update FATs")) {
141 mod |= writefat(dosfs, &boot, fat, mod & FSFIXFAT);
142 if (mod & FSFATAL)
143 goto out;
144 } else
145 mod |= FSERROR;
146 }
147
148 if (boot.NumBad)
149 pwarn("%d files, %d free (%d clusters), %d bad (%d clusters)\n",
150 boot.NumFiles,
151 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree,
152 boot.NumBad * boot.ClusterSize / 1024, boot.NumBad);
153 else
154 pwarn("%d files, %d free (%d clusters)\n",
155 boot.NumFiles,
156 boot.NumFree * boot.ClusterSize / 1024, boot.NumFree);
157
158 if (mod && (mod & FSERROR) == 0) {
159 if (mod & FSDIRTY) {
160 if (ask(1, "MARK FILE SYSTEM CLEAN") == 0)
161 mod &= ~FSDIRTY;
162
163 if (mod & FSDIRTY) {
164 pwarn("MARKING FILE SYSTEM CLEAN\n");
165 mod |= writefat(dosfs, &boot, fat, 1);
166 } else {
167 pwarn("\n***** FILE SYSTEM IS LEFT MARKED AS DIRTY *****\n");
168 mod |= FSERROR; /* file system not clean */
169 }
170 }
171 }
172
173 if (mod & (FSFATAL | FSERROR))
174 goto out;
175
176 ret = FSCK_EXIT_OK;
177
178 out:
179 if (finish_dosdirsection)
180 finishDosDirSection();
181 free(fat);
182 close(dosfs);
183
184 if (mod & (FSFATMOD|FSDIRMOD))
185 pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n");
186
187 return ret;
188 }
189