t/bin/unused_listen

   1 #!/usr/bin/env ruby
   2 # -*- encoding: binary -*-
   3 # this is to remain compatible with the unused_port function in the
   4 # Unicorn test/test_helper.rb file
   5 require 'socket'
   6 require 'tmpdir'
   7
   8 default_port = 8080
   9 addr = ENV['UNICORN_TEST_ADDR'] || '127.0.0.1'
  10 port = sock = lock_path = nil
  11
  12 begin
  13   sock = TCPServer.new(addr, 0)
  14   port = sock.addr[1]
  15
  16   # since we'll end up closing the random port we just got, there's a race
  17   # condition could allow the random port we just chose to reselect itself
  18   # when running tests in parallel with gmake.  Create a lock file while
  19   # we have the port here to ensure that does not happen.
  20   lock_path = "#{Dir::tmpdir}/unicorn_test.#{addr}:#{port}.lock"
  21   lock = File.open(lock_path, File::WRONLY|File::CREAT|File::EXCL, 0600)
  22 rescue Errno::EEXIST
  23   sock.close rescue nil
  24   retry
  25 end
  26 sock.close rescue nil
  27 puts %Q(listen=#{addr}:#{port} T_RM_LIST="$T_RM_LIST #{lock_path}")