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TS_OUTDIR="output"
TS_DIFFDIR="diff"
TS_EXPECTEDDIR="expected"
TS_INPUTDIR="input"

function ts_skip {
	echo " IGNORE ($1)"
	exit 0
}

function ts_skip_nonroot {
	if [ $UID != 0 ]; then
		ts_skip "not root permissions"
	fi
}

function ts_failed {
	if [ x"$1" == x"" ]; then
		echo " FAILED ($TS_NAME)"
	else
		echo " FAILED ($1)"
	fi
	exit 1
}

function ts_ok {
	if [ x"$1" == x"" ]; then
		echo " OK"
	else
		echo " OK ($1)"
	fi
	exit 0
}

function ts_init {
	export LANG="en_US.UTF-8":
	TS_NAME=$(basename $0)
	if [ ! -d $TS_OUTDIR ]; then
		mkdir -p $TS_OUTDIR
	fi
	if [ ! -d $TS_DIFFDIR ]; then
		mkdir -p $TS_DIFFDIR
	fi
	TS_OUTPUT="$TS_OUTDIR/$TS_NAME"
	TS_DIFF="$TS_DIFFDIR/$TS_NAME"
	TS_EXPECTED="$TS_EXPECTEDDIR/$TS_NAME"
	TS_INPUT="$TS_INPUTDIR/$TS_NAME"

	rm -f $TS_OUTPUT

	printf "%15s: %-25s ..." "$TS_COMPONENT" "$TS_DESC"
}

function ts_finalize {
	local res=0

	if [ -s $TS_EXPECTED ]; then
		if [ -s $TS_OUTPUT ]; then
			diff -u $TS_EXPECTED $TS_OUTPUT > $TS_DIFF
			if [ -s $TS_DIFF ]; then
				res=1
			fi
		else
			res=1
		fi
	else
		echo " IGNORE (expected output undefined)"
		exit 0
	fi
	if [ $res -eq 0 ]; then
		ts_ok $1
	else
		ts_failed $1
	fi
}

function ts_device_init {
	IMAGE="$TS_OUTDIR/$TS_NAME.img"
	IMAGE_RE=$( echo "$IMAGE" | sed 's:/:\\/:g' )

	dd if=/dev/zero of="$IMAGE" bs=1M count=5 &> /dev/null

	$TS_CMD_LOSETUP -f "$IMAGE" 2>&1 >> $TS_OUTPUT
	DEVICE=$( $TS_CMD_LOSETUP -a | gawk 'BEGIN {FS=":"} /'$IMAGE_RE'/ { print $1 }' )

	if [ -z "$DEVICE" ]; then
		ts_device_deinit
		return 1		# error
	fi

	return 0			# succes
}

function ts_device_deinit {
	if [ -b "$DEVICE" ]; then
		$TS_CMD_UMOUNT "$DEVICE" &> /dev/null
		$TS_CMD_LOSETUP -d "$DEVICE" &> /dev/null
		rm -f "$IMAGE" &> /dev/null
	fi
}

function ts_udev_loop_support {
	ldd $TS_CMD_MOUNT | grep -q 'libvolume_id' 2>&1 >> $TS_OUTPUT
	if [ "$?" == "0" ]; then
		HAS_VOLUMEID="yes"
	fi
	if [ -n "$HAS_VOLUMEID" ] && [ ! -L "/dev/disk/by-label/$1" ]; then
		return 1
	fi
	return 0
}

function ts_uuid_by_devname {
	local DEV="$1"
	local UUID=""
	if [ -x "$TS_ECMD_BLKID" ]; then
		UUID=$($TS_ECMD_BLKID -c /dev/null -w /dev/null -s "UUID" $DEV | sed 's/.*UUID="//g; s/"//g')
	elif [ -x "$TS_ECMD_VOLID" ]; then
		UUID=$($TS_ECMD_VOLID -u $DEV)
	fi
	echo $UUID
}

function ts_label_by_devname {
	local DEV="$1"
	local TYPE=""
	if [ -x "$TS_ECMD_BLKID" ]; then
		LABEL=$($TS_ECMD_BLKID -c /dev/null -w /dev/null -s "LABEL" $DEV | sed 's/.*LABEL="//g; s/"//g')
	elif [ -x "$TS_ECMD_VOLID" ]; then
		LABEL=$($TS_ECMD_VOLID -l $DEV)
	fi
	echo $LABEL
}

function ts_fstype_by_devname {
	local DEV="$1"
	local TYPE=""
	if [ -x "$TS_ECMD_BLKID" ]; then
		TYPE=$($TS_ECMD_BLKID -c /dev/null -w /dev/null -s "TYPE" $DEV | sed 's/.*TYPE="//g; s/"//g')
	elif [ -x "$TS_ECMD_VOLID" ]; then
		TYPE=$($TS_ECMD_VOLID -t $DEV)
	fi
	echo $TYPE
}

function ts_device_has {
	local TAG="$1"
	local VAL="$2"
	local DEV="$3"

	case $TAG in
		"TYPE") vl=$(ts_fstype_by_devname $DEV);;
		"LABEL") vl=$(ts_label_by_devname $DEV);;
		"UUID") vl=$(ts_uuid_by_devname $DEV);;
		*) return 1;;
	esac

	if [ "$vl" == "$VAL" ]; then
		return 0
	fi
	return 1
}