# File bin/experimental-deliver.rb, line 65 def filter_pid(queue_dir) pid = nil begin File::open("Maildir/.filterpid") { |file| if Time.now - file.stat.mtime < (60 * 60 * 4) pid_str = file.gets.chomp.strip if pid_str =~ /^\d+/ pid = Integer(pid_str) end end } rescue Errno::ENOENT end return pid end