computer class

gistfile1.rb

#!/usr/local/bin/ruby1.9 -w

# class possesing eight methods to provide
# information about the physical system:

# (1) mem_size
# (2) cpu_nums
# (3) cpu_vendor
# (4) cpu_model
# (5) cpu_speed
# (6) os_name
# (7) mac_num
# (8) swap_size

class Computer
   
  ############ (1) TOTAL SIZE OF MEMORY ############  
  def mem_size
    total = 0  
    result = `cat /proc/meminfo`
    result.split("\n").each do |l|
      key, value = l.split(':',2).map{|x| x.strip}
      if key == 'MemTotal'
        total = value.to_i/1024
      end
    end
    puts "Memory:         #{total} MBs"
  end

  ############ (2) NUMBER OF CPUS ############
  def cpu_nums
    result = `cat /proc/cpuinfo`
    cpus = result.split("\n\n")
    puts "Total CPUs:     " + cpus.size.to_s
  end

  ############ (3) CPU VENDOR ############
  def cpu_vendor
    vendor = String.new  
    result = `cat /proc/cpuinfo`
    cpus = result.split("\n\n")
    cpus.each do |c|
      c.split("\n").each do |l|
        key, value = l.split(':', 2).map{|x| x.strip}
        if key == 'vendor_id'
          vendor = value
        end
      end
    end
    puts "CPU Vendor:     #{vendor}"
  end

  ############ (4) CPU MODEL ############
  def cpu_model
    model = String.new  
    result = `cat /proc/cpuinfo`
    cpus = result.split("\n\n")
    cpus.each do |c|
      c.split("\n").each do |l|
        key, value = l.split(':', 2).map{|x| x.strip}
        if key == 'model name'
          model = value
        end
      end
    end
    puts "CPU Model:      #{model}"
  end

  ############ (5) CPU SPEED ############
  def cpu_speed
    speed = String.new  
    result = `cat /proc/cpuinfo`
    cpus = result.split("\n\n")
    cpus.each do |c|
      c.split("\n").each do |l|
        key, value = l.split(':', 2).map{|x| x.strip}
        if key == 'cpu MHz'
          speed = value
        end
      end
    end
    puts "CPU Speed:      #{speed} MHz"
  end
  
  ############ (6) OS NAME ############
  def os_name
    puts 'OS Name:        ' + `uname`
  end
  
  ############ (7) MAC ADDRESS ############
  def mac_num
    mac_addr = String.new  
    result = `ifconfig`
    sys_info = result.split("\n\n")
    sys_info.each do |c|
      c.split("\n").each do |l|
        key, value = l.split("  ",2).map{|x| x.strip}
        if key == 'eth0'
          mac_addr = value[28..44]
        end
      end
    end  
    puts "MAC Address:    #{mac_addr}"  
  end  

  ############ (8) SWAP SIZE ############
  def swap_size
    swap = String.new  
    result = `cat /proc/meminfo`
    sys_info = result.split("\n\n")
    sys_info.each do |c|
      c.split("\n").each do |l|
        key, value = l.split(':', 2).map{|x| x.strip}
        if key == 'SwapTotal'
          swap = value
        end
      end
    end
    puts "Swap Size:      #{swap}"
  end

end