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test_description="corrupt e2undo block data"
if test -x $E2UNDO_EXE; then
E2FSPROGS_UNDO_DIR=${TMPDIR:-/tmp}
export E2FSPROGS_UNDO_DIR
TDB_FILE=$E2FSPROGS_UNDO_DIR/tune2fs-$(basename $TMPFILE).e2undo
OUT=$test_name.log
rm -f $TDB_FILE >/dev/null 2>&1
dd if=/dev/zero of=$TMPFILE bs=1k count=512 > /dev/null 2>&1
echo mke2fs -q -F -o Linux -b 1024 $TMPFILE > $OUT
$MKE2FS -q -F -o Linux -I 128 -b 1024 $TMPFILE >> $OUT 2>&1
crc0=`$CRCSUM $TMPFILE`
echo $CRCSUM before tune2fs $crc0 >> $OUT
echo using tune2fs to test e2undo >> $OUT
$TUNE2FS -I 256 $TMPFILE >> $OUT 2>&1
crc1=`$CRCSUM $TMPFILE`
echo $CRCSUM after tune2fs $crc1 >> $OUT
undo_blks=$(( $(stat -c '%s' $TDB_FILE 2>/dev/null || stat -f '%z' $TDB_FILE 2>/dev/null) / 1024 ))
dd if=/dev/zero of=$TDB_FILE bs=1024 count=1 seek=$((undo_blks - 2)) conv=notrunc > /dev/null 2>&1
$E2UNDO $TDB_FILE $TMPFILE >> $OUT 2>&1
res=$?
crc2=`$CRCSUM $TMPFILE`
echo $CRCSUM after e2undo $crc2 >> $OUT
if [ $res -ne 0 ] && [ $crc2 = $crc1 ] && [ $crc2 != $crc0 ]; then
echo "$test_name: $test_description: ok"
touch $test_name.ok
else
ln -f $test_name.log $test_name.failed
echo "$test_name: $test_description: failed"
fi
rm -f $TDB_FILE $TMPFILE
fi
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