alive? (Merb::Server)

    # File lib/merb-core/server.rb, line 54
          def alive?(port)
            pidfile = pid_file(port)
            pid     = pid_in_file(pidfile)
            Process.kill(0, pid)
            true
          rescue Errno::ESRCH, Errno::ENOENT
            false
          rescue Errno::EACCES => e
            Merb.fatal!("You don't have access to the PID file at #{pidfile}: #{e.message}")
          end