close on fork

forktest.rb

require 'drb'

def test_fd
  sleeper = DRbObject.new_with_uri('druby://localhost:50097')

  ary = 20.times.collect {
    Thread.new { sleeper.sleep(5) }
  }
  ary.each {|th| th.join}

  system("lsof -p #{$$} | wc -l")

  fork {
    system("lsof -p #{$$} | wc -l")
    GC.start # close on fork and GC (new one)
    system("lsof -p #{$$} | wc -l")
    sleeper.sleep(0.1) # close on dRuby call. (PR Fix some DRb issues #2552)
    system("lsof -p #{$$} | wc -l")
  }
end

test_fd
gets
test_fd
gets

sleeper.rb

require 'drb'

class Sleeper
  def sleep(n)
    puts "sleeping: #{n}"
    Kernel.sleep(n)
  end
end

DRb.start_service('druby://localhost:50097', Sleeper.new)
gets