r.rb

  def run_mtr
    @mtr_out  = Array.new
    h = Hash.new
    mtr_cmd = "mtr -i 2 -t #{@options[:host]} --report -c #{@options[:mtr_count]} --report-wide"
    stdout = `#{mtr_cmd}`
    @mtr_out.push(mtr_cmd)
    stdout.each do |line|
      if line =~ /^\s+\d/
        re = /^\s+(\d*)\.\s*(\?\?\?)|^\s*(\d*).\s*(\S*).*?(\d*?.\d*?)%\s*.*?\d\s+(.*?)\s.*?/
        m = re.match(line)
        
        if m.captures.count < 4
          STDOUT.puts("encountered ??? on #{$1}")
          next
        end
        
        id,host,packet_loss,latency_avg = m.captures
        h[id] = Hash.new()
        h[id]['host'] = host
        h[id]['packet_loss'] = packet_loss
        h[id]['latency_avg'] = latency_avg
      end
      @mtr_out.push(line)
    end
    h
  end