#!/bin/env ruby

cur_freq = IO.readlines("/proc/cpuinfo").grep(/cpu MHz/).first.split[-1].sub(/\./,'')

tableau = IO.read("/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies").split(" ")

tableau.each_index { |freq|

        if tableau.fetch(freq) == cur_freq
                begin; freqtab = array[tableau.index(freq)-1]; rescue; end
                puts freqtab
        end
        #if tableau.fetch(freq) == cur_freq and tableau.fetch(freq) != (tableau.length-1)
        #        puts tableau.fetch(freq+1)
        #end
}
#tableau.each do |ligne|
#  if ligne == cur_freq
#        puts ligne
#  end
#end