xref: /freebsd/sbin/fsck_msdosfs/check.c (revision 9708ba9f29bd83e21d532f89f93b8c3bf945e843)
11de7b4b8SPedro F. Giffuni /*-
21de7b4b8SPedro F. Giffuni  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
31de7b4b8SPedro F. Giffuni  *
40121b42aSDavid E. O'Brien  * Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
50121b42aSDavid E. O'Brien  * Copyright (c) 1995 Martin Husemann
60121b42aSDavid E. O'Brien  *
70121b42aSDavid E. O'Brien  * Redistribution and use in source and binary forms, with or without
80121b42aSDavid E. O'Brien  * modification, are permitted provided that the following conditions
90121b42aSDavid E. O'Brien  * are met:
100121b42aSDavid E. O'Brien  * 1. Redistributions of source code must retain the above copyright
110121b42aSDavid E. O'Brien  *    notice, this list of conditions and the following disclaimer.
120121b42aSDavid E. O'Brien  * 2. Redistributions in binary form must reproduce the above copyright
130121b42aSDavid E. O'Brien  *    notice, this list of conditions and the following disclaimer in the
140121b42aSDavid E. O'Brien  *    documentation and/or other materials provided with the distribution.
150121b42aSDavid E. O'Brien  *
160121b42aSDavid E. O'Brien  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
170121b42aSDavid E. O'Brien  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
180121b42aSDavid E. O'Brien  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
190121b42aSDavid E. O'Brien  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
200121b42aSDavid E. O'Brien  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
210121b42aSDavid E. O'Brien  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
220121b42aSDavid E. O'Brien  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
230121b42aSDavid E. O'Brien  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
240121b42aSDavid E. O'Brien  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
250121b42aSDavid E. O'Brien  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
260121b42aSDavid E. O'Brien  */
270121b42aSDavid E. O'Brien 
280121b42aSDavid E. O'Brien 
290121b42aSDavid E. O'Brien #include <sys/cdefs.h>
300121b42aSDavid E. O'Brien #ifndef lint
316cf357bcSUlrich Spörlein __RCSID("$NetBSD: check.c,v 1.14 2006/06/05 16:51:18 christos Exp $");
320121b42aSDavid E. O'Brien static const char rcsid[] =
330121b42aSDavid E. O'Brien   "$FreeBSD$";
340121b42aSDavid E. O'Brien #endif /* not lint */
350121b42aSDavid E. O'Brien 
360121b42aSDavid E. O'Brien #include <stdlib.h>
370121b42aSDavid E. O'Brien #include <string.h>
380121b42aSDavid E. O'Brien #include <stdio.h>
390121b42aSDavid E. O'Brien #include <unistd.h>
400121b42aSDavid E. O'Brien #include <fcntl.h>
410121b42aSDavid E. O'Brien 
420121b42aSDavid E. O'Brien #include "ext.h"
430121b42aSDavid E. O'Brien #include "fsutil.h"
440121b42aSDavid E. O'Brien 
450121b42aSDavid E. O'Brien int
46565e3e65STom Rhodes checkfilesys(const char *fname)
470121b42aSDavid E. O'Brien {
480121b42aSDavid E. O'Brien 	int dosfs;
490121b42aSDavid E. O'Brien 	struct bootblock boot;
50*9708ba9fSXin LI 	struct fat_descriptor *fat = NULL;
516069db97SKonstantin Belousov 	int finish_dosdirsection=0;
520121b42aSDavid E. O'Brien 	int mod = 0;
530121b42aSDavid E. O'Brien 	int ret = 8;
540121b42aSDavid E. O'Brien 
550121b42aSDavid E. O'Brien 	rdonly = alwaysno;
560121b42aSDavid E. O'Brien 	if (!preen)
570121b42aSDavid E. O'Brien 		printf("** %s", fname);
580121b42aSDavid E. O'Brien 
590121b42aSDavid E. O'Brien 	dosfs = open(fname, rdonly ? O_RDONLY : O_RDWR, 0);
600121b42aSDavid E. O'Brien 	if (dosfs < 0 && !rdonly) {
610121b42aSDavid E. O'Brien 		dosfs = open(fname, O_RDONLY, 0);
620121b42aSDavid E. O'Brien 		if (dosfs >= 0)
630121b42aSDavid E. O'Brien 			pwarn(" (NO WRITE)\n");
640121b42aSDavid E. O'Brien 		else if (!preen)
650121b42aSDavid E. O'Brien 			printf("\n");
660121b42aSDavid E. O'Brien 		rdonly = 1;
670121b42aSDavid E. O'Brien 	} else if (!preen)
680121b42aSDavid E. O'Brien 		printf("\n");
690121b42aSDavid E. O'Brien 
700121b42aSDavid E. O'Brien 	if (dosfs < 0) {
716cf357bcSUlrich Spörlein 		perr("Can't open `%s'", fname);
722923ae8aSJaakko Heinonen 		printf("\n");
730121b42aSDavid E. O'Brien 		return 8;
740121b42aSDavid E. O'Brien 	}
750121b42aSDavid E. O'Brien 
763e855e9cSXin LI 	if (readboot(dosfs, &boot) == FSFATAL) {
770121b42aSDavid E. O'Brien 		close(dosfs);
780121b42aSDavid E. O'Brien 		printf("\n");
790121b42aSDavid E. O'Brien 		return 8;
800121b42aSDavid E. O'Brien 	}
810121b42aSDavid E. O'Brien 
82ae62d940SBruce Evans 	if (skipclean && preen && checkdirty(dosfs, &boot)) {
83f7bf3122SBruce Evans 		printf("%s: ", fname);
84cede1f56STom Rhodes 		printf("FILESYSTEM CLEAN; SKIPPING CHECKS\n");
85cede1f56STom Rhodes 		ret = 0;
86cede1f56STom Rhodes 		goto out;
87cede1f56STom Rhodes 	}
88cede1f56STom Rhodes 
890121b42aSDavid E. O'Brien 	if (!preen)  {
90*9708ba9fSXin LI 		printf("** Phase 1 - Read FAT and checking connectivity\n");
910121b42aSDavid E. O'Brien 	}
920121b42aSDavid E. O'Brien 
93*9708ba9fSXin LI 	mod |= readfat(dosfs, &boot, &fat);
940121b42aSDavid E. O'Brien 	if (mod & FSFATAL) {
950121b42aSDavid E. O'Brien 		close(dosfs);
960121b42aSDavid E. O'Brien 		return 8;
970121b42aSDavid E. O'Brien 	}
980121b42aSDavid E. O'Brien 
9973db93b8SXin LI 	if (!preen)
100*9708ba9fSXin LI 		printf("** Phase 2 - Checking Directories\n");
10173db93b8SXin LI 
102*9708ba9fSXin LI 	mod |= resetDosDirSection(fat);
1030121b42aSDavid E. O'Brien 	finish_dosdirsection = 1;
1040121b42aSDavid E. O'Brien 	if (mod & FSFATAL)
1050121b42aSDavid E. O'Brien 		goto out;
1060121b42aSDavid E. O'Brien 	/* delay writing FATs */
1070121b42aSDavid E. O'Brien 
108*9708ba9fSXin LI 	mod |= handleDirTree(fat);
1090121b42aSDavid E. O'Brien 	if (mod & FSFATAL)
1100121b42aSDavid E. O'Brien 		goto out;
1110121b42aSDavid E. O'Brien 
1120121b42aSDavid E. O'Brien 	if (!preen)
113*9708ba9fSXin LI 		printf("** Phase 3 - Checking for Lost Files\n");
1140121b42aSDavid E. O'Brien 
115*9708ba9fSXin LI 	mod |= checklost(fat);
1160121b42aSDavid E. O'Brien 	if (mod & FSFATAL)
1170121b42aSDavid E. O'Brien 		goto out;
1180121b42aSDavid E. O'Brien 
1190121b42aSDavid E. O'Brien 	/* now write the FATs */
120*9708ba9fSXin LI 	if (mod & FSFATMOD) {
1210121b42aSDavid E. O'Brien 		if (ask(1, "Update FATs")) {
122*9708ba9fSXin LI 			mod |= writefat(fat);
1230121b42aSDavid E. O'Brien 			if (mod & FSFATAL)
1240121b42aSDavid E. O'Brien 				goto out;
1250121b42aSDavid E. O'Brien 		} else
1260121b42aSDavid E. O'Brien 			mod |= FSERROR;
1270121b42aSDavid E. O'Brien 	}
1280121b42aSDavid E. O'Brien 
1290121b42aSDavid E. O'Brien 	if (boot.NumBad)
1300121b42aSDavid E. O'Brien 		pwarn("%d files, %d free (%d clusters), %d bad (%d clusters)\n",
1310121b42aSDavid E. O'Brien 		      boot.NumFiles,
1320121b42aSDavid E. O'Brien 		      boot.NumFree * boot.ClusterSize / 1024, boot.NumFree,
1330121b42aSDavid E. O'Brien 		      boot.NumBad * boot.ClusterSize / 1024, boot.NumBad);
1340121b42aSDavid E. O'Brien 	else
1350121b42aSDavid E. O'Brien 		pwarn("%d files, %d free (%d clusters)\n",
1360121b42aSDavid E. O'Brien 		      boot.NumFiles,
1370121b42aSDavid E. O'Brien 		      boot.NumFree * boot.ClusterSize / 1024, boot.NumFree);
1380121b42aSDavid E. O'Brien 
1390121b42aSDavid E. O'Brien 	if (mod && (mod & FSERROR) == 0) {
1400121b42aSDavid E. O'Brien 		if (mod & FSDIRTY) {
1410121b42aSDavid E. O'Brien 			if (ask(1, "MARK FILE SYSTEM CLEAN") == 0)
1420121b42aSDavid E. O'Brien 				mod &= ~FSDIRTY;
1430121b42aSDavid E. O'Brien 
1440121b42aSDavid E. O'Brien 			if (mod & FSDIRTY) {
1450121b42aSDavid E. O'Brien 				pwarn("MARKING FILE SYSTEM CLEAN\n");
146*9708ba9fSXin LI 				mod |= writefat(fat);
1470121b42aSDavid E. O'Brien 			} else {
1480121b42aSDavid E. O'Brien 				pwarn("\n***** FILE SYSTEM IS LEFT MARKED AS DIRTY *****\n");
1490121b42aSDavid E. O'Brien 				mod |= FSERROR; /* file system not clean */
1500121b42aSDavid E. O'Brien 			}
1510121b42aSDavid E. O'Brien 		}
1520121b42aSDavid E. O'Brien 	}
1530121b42aSDavid E. O'Brien 
1540121b42aSDavid E. O'Brien 	if (mod & (FSFATAL | FSERROR))
1550121b42aSDavid E. O'Brien 		goto out;
1560121b42aSDavid E. O'Brien 
1570121b42aSDavid E. O'Brien 	ret = 0;
1580121b42aSDavid E. O'Brien 
1590121b42aSDavid E. O'Brien     out:
1600121b42aSDavid E. O'Brien 	if (finish_dosdirsection)
1610121b42aSDavid E. O'Brien 		finishDosDirSection();
1620121b42aSDavid E. O'Brien 	free(fat);
1630121b42aSDavid E. O'Brien 	close(dosfs);
1640121b42aSDavid E. O'Brien 
1650121b42aSDavid E. O'Brien 	if (mod & (FSFATMOD|FSDIRMOD))
1660121b42aSDavid E. O'Brien 		pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n");
1670121b42aSDavid E. O'Brien 
1680121b42aSDavid E. O'Brien 	return ret;
1690121b42aSDavid E. O'Brien }
170