# File lib/phusion_passenger/loader_shared_helpers.rb, line 152
        def dump_envvars
                if dir = ENV['PASSENGER_DEBUG_DIR']
                        File.open("#{dir}/envvars", "wb") do |f|
                                ENV.each_pair do |key, value|
                                        f.puts "#{key} = #{value}"
                                end
                        end
                end
        rescue SystemCallError
                # Don't care.
        end