package mountlib import (	"io"	"os"	"runtime" 	"github.com/pkg/errors"	"github.com/rclone/rclone/fs") // CheckMountEmpty checks if folder is emptyfunc CheckMountEmpty(mountpoint string) error {	fp, fpErr := os.Open(mountpoint) 	if fpErr != nil {		return errors.Wrap(fpErr, "Can not open: "+mountpoint)	}	defer fs.CheckClose(fp, &fpErr) 	_, fpErr = fp.Readdirnames(1) 	if fpErr == io.EOF {		return nil	} 	msg := "Directory is not empty: " + mountpoint + " If you want to mount it anyway use: --allow-non-empty option"	if fpErr == nil {		return errors.New(msg)	}	return errors.Wrap(fpErr, msg)} // ClipBlocks clips the blocks pointed to the OS maxfunc ClipBlocks(b *uint64) {	var max uint64	switch runtime.GOOS {	case "windows":		if runtime.GOARCH == "386" {			max = (1 << 32) - 1		} else {			max = (1 << 43) - 1		}	case "darwin":		// OSX FUSE only supports 32 bit number of blocks		// https://github.com/osxfuse/osxfuse/issues/396		max = (1 << 32) - 1	default:		// no clipping		return	}	if *b > max {		*b = max	}}