class Puma::Binder

def create_activated_fds(env_hash)
  @log_writer.debug "ENV['LISTEN_FDS'] #{ENV['LISTEN_FDS'].inspect}  env_hash['LISTEN_PID'] #{env_hash['LISTEN_PID'].inspect}"
  return [] unless env_hash['LISTEN_FDS'] && env_hash['LISTEN_PID'].to_i == $$
  env_hash['LISTEN_FDS'].to_i.times do |index|
    sock = TCPServer.for_fd(socket_activation_fd(index))
    key = begin # Try to parse as a path
      [:unix, Socket.unpack_sockaddr_un(sock.getsockname)]
    rescue ArgumentError # Try to parse as a port/ip
      port, addr = Socket.unpack_sockaddr_in(sock.getsockname)
      addr = "[#{addr}]" if addr&.include? ':'
      [:tcp, addr, port]
    end
    @activated_sockets[key] = sock
    @log_writer.debug "Registered #{key.join ':'} for activation from LISTEN_FDS"
  end
  ["LISTEN_FDS", "LISTEN_PID"] # Signal to remove these keys from ENV
end