const DefaultProcMountPoint … const DefaultSysMountPoint … const DefaultConfigfsMountPoint … type FS … // NewFS returns a new FS mounted under the given mountPoint. It will error // if the mount point can't be read. func NewFS(mountPoint string) (FS, error) { … } // Path appends the given path elements to the filesystem path, adding separators // as necessary. func (fs FS) Path(p ...string) string { … }