CatPipeInput.scala

val f = userHome/"Documents"/"jack"/"fifo.log"
val fin = new java.io.BufferedReader(new java.io.FileReader(f))

new Thread {
  override def run(): Unit = {
    var ln = null: String
    do {
      ln = fin.readLine()
      if (ln != null) println(s"LINE: $ln")
    } while (ln != null)
    println("CLOSE")
  }
  start()
}