// +build !windows
 

 package layer // import "github.com/docker/docker/layer"

 import "runtime"
 

 // setOS writes the "os" file to the layer filestore
 func (fm *fileMetadataTransaction) setOS(os string) error {

 	return nil
 }
 

 // getOS reads the "os" file from the layer filestore
 func (fms *fileMetadataStore) getOS(layer ChainID) (string, error) {

 	return runtime.GOOS, nil

 }