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-rw-r--r--sbin/fsck_msdosfs/check.c194
1 files changed, 194 insertions, 0 deletions
diff --git a/sbin/fsck_msdosfs/check.c b/sbin/fsck_msdosfs/check.c
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+++ b/sbin/fsck_msdosfs/check.c
@@ -0,0 +1,194 @@
+/*
+ * 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.
+ * 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.
+ */
+
+
+#include <sys/cdefs.h>
+#ifndef lint
+__RCSID("$NetBSD: check.c,v 1.10 2000/04/25 23:02:51 jdolecek Exp $");
+static const char rcsid[] =
+ "$FreeBSD$";
+#endif /* not lint */
+
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include "ext.h"
+#include "fsutil.h"
+
+int
+checkfilesys(fname)
+ const char *fname;
+{
+ int dosfs;
+ struct bootblock boot;
+ struct fatEntry *fat = NULL;
+ int i, finish_dosdirsection=0;
+ int mod = 0;
+ int ret = 8;
+
+ 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);
+ printf("\n");
+ 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) {
+ close(dosfs);
+ return 8;
+ }
+
+ if (boot.ValidFat < 0)
+ for (i = 1; i < boot.FATs; i++) {
+ struct fatEntry *currentFat;
+
+ mod |= readfat(dosfs, &boot, i, &currentFat);
+
+ if (mod & FSFATAL)
+ goto out;
+
+ mod |= comparefat(&boot, fat, currentFat, i);
+ free(currentFat);
+ if (mod & FSFATAL)
+ goto out;
+ }
+
+ if (!preen)
+ printf("** Phase 2 - Check Cluster Chains\n");
+
+ mod |= checkfat(&boot, fat);
+ if (mod & FSFATAL)
+ goto out;
+ /* delay writing FATs */
+
+ if (!preen)
+ printf("** Phase 3 - Checking Directories\n");
+
+ mod |= resetDosDirSection(&boot, fat);
+ finish_dosdirsection = 1;
+ if (mod & FSFATAL)
+ goto out;
+ /* delay writing FATs */
+
+ mod |= handleDirTree(dosfs, &boot, fat);
+ if (mod & FSFATAL)
+ goto out;
+
+ if (!preen)
+ printf("** Phase 4 - Checking for Lost Files\n");
+
+ mod |= checklost(dosfs, &boot, fat);
+ if (mod & FSFATAL)
+ goto out;
+
+ /* now write the FATs */
+ if (mod & FSFATMOD) {
+ if (ask(1, "Update FATs")) {
+ mod |= writefat(dosfs, &boot, fat, mod & FSFIXFAT);
+ if (mod & FSFATAL)
+ goto out;
+ } else
+ mod |= FSERROR;
+ }
+
+ 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 && (mod & FSERROR) == 0) {
+ if (mod & FSDIRTY) {
+ if (ask(1, "MARK FILE SYSTEM CLEAN") == 0)
+ mod &= ~FSDIRTY;
+
+ if (mod & FSDIRTY) {
+ pwarn("MARKING FILE SYSTEM CLEAN\n");
+ mod |= writefat(dosfs, &boot, fat, 1);
+ } else {
+ pwarn("\n***** FILE SYSTEM IS LEFT MARKED AS DIRTY *****\n");
+ mod |= FSERROR; /* file system not clean */
+ }
+ }
+ }
+
+ if (mod & (FSFATAL | FSERROR))
+ goto out;
+
+ ret = 0;
+
+ out:
+ if (finish_dosdirsection)
+ finishDosDirSection();
+ free(fat);
+ close(dosfs);
+
+ if (mod & (FSFATMOD|FSDIRMOD))
+ pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n");
+
+ return ret;
+}