1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
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#endif /* not lint */
33
34#ifdef HAVE_LIBUTIL_H
35#include <libutil.h>
36#endif
37#include <stdlib.h>
38#include <string.h>
39#include <stdio.h>
40#include <unistd.h>
41#include <fcntl.h>
42
43#include "ext.h"
44#include "fsutil.h"
45
46int
47checkfilesys(const char *fname)
48{
49	int dosfs;
50	struct bootblock boot;
51	struct fat_descriptor *fat = NULL;
52	int finish_dosdirsection=0;
53	int mod = 0;
54	int ret = 8;
55	int64_t freebytes;
56	int64_t badbytes;
57
58	rdonly = alwaysno;
59	if (!preen)
60		printf("** %s", fname);
61
62	dosfs = open(fname, rdonly ? O_RDONLY : O_RDWR, 0);
63	if (dosfs < 0 && !rdonly) {
64		dosfs = open(fname, O_RDONLY, 0);
65		if (dosfs >= 0)
66			pwarn(" (NO WRITE)\n");
67		else if (!preen)
68			printf("\n");
69		rdonly = 1;
70	} else if (!preen)
71		printf("\n");
72
73	if (dosfs < 0) {
74		perr("Can't open `%s'", fname);
75		printf("\n");
76		return 8;
77	}
78
79	if (readboot(dosfs, &boot) == FSFATAL) {
80		close(dosfs);
81		printf("\n");
82		return 8;
83	}
84
85	if (skipclean && preen && checkdirty(dosfs, &boot)) {
86		printf("%s: ", fname);
87		printf("FILESYSTEM CLEAN; SKIPPING CHECKS\n");
88		ret = 0;
89		goto out;
90	}
91
92	if (!preen)  {
93		printf("** Phase 1 - Read FAT and checking connectivity\n");
94	}
95
96	mod |= readfat(dosfs, &boot, &fat);
97	if (mod & FSFATAL) {
98		close(dosfs);
99		return 8;
100	}
101
102	if (!preen)
103		printf("** Phase 2 - Checking Directories\n");
104
105	mod |= resetDosDirSection(fat);
106	finish_dosdirsection = 1;
107	if (mod & FSFATAL)
108		goto out;
109	/* delay writing FATs */
110
111	mod |= handleDirTree(fat);
112	if (mod & FSFATAL)
113		goto out;
114
115	if (!preen)
116		printf("** Phase 3 - Checking for Lost Files\n");
117
118	mod |= checklost(fat);
119	if (mod & FSFATAL)
120		goto out;
121
122	/* now write the FATs */
123	if (mod & FSFATMOD) {
124		if (ask(1, "Update FATs")) {
125			mod |= writefat(fat);
126			if (mod & FSFATAL)
127				goto out;
128		} else
129			mod |= FSERROR;
130	}
131
132	freebytes = (int64_t)boot.NumFree * boot.ClusterSize;
133	badbytes = (int64_t)boot.NumBad * boot.ClusterSize;
134
135#ifdef HAVE_LIBUTIL_H
136	char freestr[7], badstr[7];
137
138	humanize_number(freestr, sizeof(freestr), freebytes, "",
139	    HN_AUTOSCALE, HN_DECIMAL | HN_IEC_PREFIXES);
140	if (boot.NumBad) {
141		humanize_number(badstr, sizeof(badstr), badbytes, "",
142		    HN_AUTOSCALE, HN_B | HN_DECIMAL | HN_IEC_PREFIXES);
143
144		pwarn("%d files, %sB free (%d clusters), %sB bad (%d clusters)\n",
145		      boot.NumFiles, freestr, boot.NumFree,
146		      badstr, boot.NumBad);
147	} else {
148		pwarn("%d files, %sB free (%d clusters)\n",
149		      boot.NumFiles, freestr, boot.NumFree);
150	}
151#else
152	if (boot.NumBad)
153		pwarn("%d files, %jd KiB free (%d clusters), %jd KiB bad (%d clusters)\n",
154		      boot.NumFiles, (intmax_t)freebytes / 1024, boot.NumFree,
155		      (intmax_t)badbytes / 1024, boot.NumBad);
156	else
157		pwarn("%d files, %jd KiB free (%d clusters)\n",
158		      boot.NumFiles, (intmax_t)freebytes / 1024, boot.NumFree);
159#endif
160
161	if (mod && (mod & FSERROR) == 0) {
162		if (mod & FSDIRTY) {
163			if (ask(1, "MARK FILE SYSTEM CLEAN") == 0)
164				mod &= ~FSDIRTY;
165
166			if (mod & FSDIRTY) {
167				pwarn("MARKING FILE SYSTEM CLEAN\n");
168				mod |= cleardirty(fat);
169			} else {
170				pwarn("\n***** FILE SYSTEM IS LEFT MARKED AS DIRTY *****\n");
171				mod |= FSERROR; /* file system not clean */
172			}
173		}
174	}
175
176	if (mod & (FSFATAL | FSERROR))
177		goto out;
178
179	ret = 0;
180
181    out:
182	if (finish_dosdirsection)
183		finishDosDirSection();
184	free(fat);
185	close(dosfs);
186
187	if (mod & (FSFATMOD|FSDIRMOD))
188		pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n");
189
190	return ret;
191}
192