You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: flock.go
    path of file: ./repos/docker-ce/components/engine/vendor/github.com/gofrs/flock
    
    the code of the file until where you have to start completion: // Copyright 2015 Tim Heckman. A
    
func (f *Flock) setFh() error {
	// open a new os.File instance
	// create it if it doesn't exist, and open the file read-only.
	fh, err := os.OpenFile(f.path, os.O_CREATE|os.O_RDONLY, os.FileMode(0600))
	if err != nil {
		return err
	}

	// set the filehandle on the struct
	f.fh = fh
	return nil
}