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/* $OpenBSD: check.c,v 1.21 2021/07/12 15:09:18 beck Exp $ */
/* $NetBSD: check.c,v 1.8 1997/10/17 11:19:29 ws Exp $ */
/*
* Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
* Copyright (c) 1995 Martin Husemann
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/dkio.h>
#include <sys/disklabel.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <unistd.h>
#include <limits.h>
#include <fcntl.h>
#include <util.h>
#include <err.h>
#include "ext.h"
struct disklabel lab;
int
checkfilesys(const char *fname)
{
int dosfs;
struct bootblock boot;
struct fatEntry *fat = NULL;
char *realdev;
int i;
int mod = 0;
if (unveil("/dev", "rw") == -1)
err(1, "unveil /dev");
rdonly = alwaysno;
dosfs = opendev(fname, rdonly ? O_RDONLY : O_RDWR, 0, &realdev);
if (dosfs == -1 && !rdonly) {
dosfs = opendev(fname, O_RDONLY, 0, &realdev);
rdonly = 1;
}
if (dosfs == -1) {
xperror("Can't open");
return (8);
}
if (!preen) {
printf("** %s", realdev);
if (strncmp(fname, realdev, PATH_MAX) != 0)
printf(" (%s)", fname);
if (rdonly)
printf(" (NO WRITE)");
printf("\n");
}
if (ioctl(dosfs, DIOCGDINFO, (char *)&lab) == -1)
pfatal("can't read disk label for %s\n", fname);
if (pledge("stdio", NULL) == -1)
err(1, "pledge");
if (readboot(dosfs, &boot) != FSOK) {
(void)close(dosfs);
return (8);
}
if (!preen) {
if (boot.ValidFat < 0)
printf("** Phase 1 - Read and Compare FATs\n");
else
printf("** Phase 1 - Read FAT\n");
}
mod |= readfat(dosfs, &boot, boot.ValidFat >= 0 ? boot.ValidFat : 0, &fat);
if (mod & FSFATAL) {
(void)close(dosfs);
return 8;
}
if (boot.ValidFat < 0)
for (i = 1; i < boot.FATs; i++) {
struct fatEntry *currentFat;
mod |= readfat(dosfs, &boot, i, ¤tFat);
if (mod & FSFATAL) {
free(fat);
(void)close(dosfs);
return 8;
}
mod |= comparefat(&boot, fat, currentFat, i);
free(currentFat);
if (mod & FSFATAL) {
free(fat);
(void)close(dosfs);
return (8);
}
}
if (!preen)
printf("** Phase 2 - Check Cluster Chains\n");
mod |= checkfat(&boot, fat);
if (mod & FSFATAL) {
free(fat);
(void)close(dosfs);
return (8);
}
if (mod & FSFATMOD)
mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */
if (mod & FSFATAL) {
free(fat);
(void)close(dosfs);
return (8);
}
if (!preen)
printf("** Phase 3 - Check Directories\n");
mod |= resetDosDirSection(&boot, fat);
if (mod & FSFATAL) {
free(fat);
close(dosfs);
return 8;
}
if (mod & FSFATMOD)
mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */
if (mod & FSFATAL) {
finishDosDirSection();
free(fat);
(void)close(dosfs);
return (8);
}
mod |= handleDirTree(dosfs, &boot, fat);
if (mod & FSFATAL) {
finishDosDirSection();
free(fat);
(void)close(dosfs);
return (8);
}
if (!preen)
printf("** Phase 4 - Check for Lost Files\n");
mod |= checklost(dosfs, &boot, fat);
if (mod & FSFATAL) {
finishDosDirSection();
free(fat);
(void)close(dosfs);
return 8;
}
if (mod & FSFATMOD)
mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */
finishDosDirSection();
free(fat);
(void)close(dosfs);
if (mod & FSFATAL)
return 8;
if (boot.NumBad)
pwarn("%d files, %d free (%d clusters), %d bad (%d clusters)\n",
boot.NumFiles,
boot.NumFree * boot.ClusterSize / 1024, boot.NumFree,
boot.NumBad * boot.ClusterSize / 1024, boot.NumBad);
else
pwarn("%d files, %d free (%d clusters)\n",
boot.NumFiles,
boot.NumFree * boot.ClusterSize / 1024, boot.NumFree);
if (mod & (FSFATAL | FSERROR))
return (8);
if (mod) {
pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n");
return (4);
}
return (0);
}
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