Class: Jah::Mem

Inherits:
Object
  • Object
show all
Includes:
Command
Defined in:
lib/jah/commands/mem.rb

Constant Summary

Constants included from Command

Command::COMM

Class Method Summary collapse

Methods included from Command

find, included

Class Method Details

.read ⇒ Object 



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# File 'lib/jah/commands/mem.rb', line 14

def read
  mem_info = {}
  `cat /proc/meminfo`.each do |line|
    _, key, value = *line.match(/^(\w+):\s+(\d+)\s/)
    mem_info[key] = value.to_i
  end

  # memory info is empty - operating system may not support it (why doesn't an exception get raised earlier on mac osx?)
  raise "No such file or directory" if mem_info.empty?
  @res = {}
  @res[:total] = total = mem_info['MemTotal'] / 1024
  @res[:free] = free = (mem_info['MemFree'] + mem_info['Buffers'] + mem_info['Cached']) / 1024
  @res[:used] = total - free
  @res[:percent] = (free / total.to_f * 100).to_i

  @res[:swap_total] = stotal = mem_info['SwapTotal'] / 1024
  @res[:swap_free] = sfree = mem_info['SwapFree'] / 1024
  # @res[:swap_used] = stotal - sfree
  # unless stotal == 0
  #   @swap_percent = (@swap_used / @swap_total.to_f * 100).to_i
  # end
rescue Exception => e
  if e.message =~ /No such file or directory/
    puts "/proc/meminfo not found.. trying top!"
    top = `top -l 1`.to_a[5].split.map!{|m| m[0..-2].to_i}.reject(&:zero?)
    @res[:used], @res[:free] = top[3,4]
    @res[:total] = @res[:used] + @res[:free]
    @res[:percent] = (@res[:free] / @res[:total].to_f * 100).to_i
  else
    raise e
  end
end

.snap ⇒ Object 



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# File 'lib/jah/commands/mem.rb', line 9

def snap
  read
  "Free: #{@res[:free]} Used: #{@res[:used]} #{@res[:percent]}%"
end