Random number generator device

func urandom() {
    static device = %f'/dev/urandom'

    device.open('<:raw', \var fh, \var err) ->
        || die "Can't open `#{device}': #{err}"

    fh.sysread(\var noise, 4)
    'L'.unpack(noise)
}

say urandom()    # sample: 1989353410