NetBSD/sbin/fsck_msdos/check.c

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/* $NetBSD: check.c,v 1.5 1996/09/27 23:22:52 christos Exp $ */
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/*
* Copyright (C) 1995, 1996 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Martin Husemann
* and Wolfgang Solfrank.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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.
*/
#ifndef lint
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static char rcsid[] = "$NetBSD: check.c,v 1.5 1996/09/27 23:22:52 christos Exp $";
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#endif /* not lint */
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include "ext.h"
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#include "fsutil.h"
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int
checkfilesys(fname)
const char *fname;
{
int dosfs;
struct bootblock boot;
struct fatEntry * fat = NULL;
int i;
int mod = 0;
rdonly = alwaysno;
if (!preen)
printf("** %s", fname);
dosfs = open(fname, rdonly ? O_RDONLY : O_RDWR, 0);
if (dosfs < 0 && !rdonly) {
dosfs = open(fname, O_RDONLY, 0);
if (dosfs >= 0)
pwarn(" (NO WRITE)\n");
else if (!preen)
printf("\n");
rdonly = 1;
} else if (!preen)
printf("\n");
if (dosfs < 0) {
perror("Can't open");
return 8;
}
if (readboot(dosfs, &boot) != FSOK) {
close(dosfs);
return 8;
}
if (!preen)
printf("** Phase 1 - Read and Compare FATs\n");
for (i = 0; i < boot.FATs; i++) {
struct fatEntry *currentFat;
mod |= readfat(dosfs, &boot, i, &currentFat);
if (mod & FSFATAL) {
if (fat)
free(fat);
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close(dosfs);
return 8;
}
if (fat == NULL)
fat = currentFat;
else {
mod |= comparefat(&boot, fat, currentFat, i + 1);
free(currentFat);
if (mod & FSFATAL) {
free(fat);
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close(dosfs);
return 8;
}
}
}
if (!preen)
printf("** Phase 2 - Check Cluster Chains\n");
mod |= checkfat(&boot, fat);
if (mod & FSFATAL) {
free(fat);
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close(dosfs);
return 8;
}
if (mod & FSFATMOD)
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mod |= writefat(dosfs, &boot, fat); /* delay writing fats? XXX */
if (mod & FSFATAL) {
free(fat);
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close(dosfs);
return 8;
}
if (!preen)
printf("** Phase 3 - Checking Directories\n");
if (resetDosDirSection(&boot) & FSFATAL) {
free(fat);
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close(dosfs);
return 8;
}
mod |= handleDirTree(dosfs, &boot, fat);
if (mod & FSFATAL) {
finishDosDirSection();
free(fat);
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close(dosfs);
return 8;
}
if (!preen)
printf("** Phase 4 - Checking for Lost Files\n");
mod |= checklost(dosfs, &boot, fat);
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finishDosDirSection();
free(fat);
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close(dosfs);
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pwarn("%d files, %d free (%d clusters)\n",
boot.NumFiles, boot.NumFree * boot.ClusterSize / 1024,
boot.NumFree);
if (mod & (FSFATAL | FSERROR))
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return 8;
if (mod) {
pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n");
return 4;
}
return 0;
}