gistfile1.txt

def fork_tourist
  fork do    
    # we're in the child
    # run your tour
  end
end  


number_of_tours = 20

pipes = []

number_of_tours.times do |idx|
  pipe.read, pipe.write = IO.pipe
  pipes << [idx, pipe.read, pipe.write]
end

pipes.each do |pipe|
  fork_tourist
end

MAX_LEN = 1024

# we're in the parent
while true
  pipes.each do |id, pipe_read, _|
    result = read_pipe.read_nonblock(MAX_LEN)
    case result
      ...
    end
  end
end