Blink all locate LEDs of an SAS-enclosure binded to a block device

blink-enclosure.rb

#!/usr/bin/env ruby
#
# Blink all locate LEDs of an SAS-enclosure binded to a block device
# Hiroyuki Mishima (missy@be.to)
#

require 'optparse'

class BlinkEnclosure
  PARALLEL = "parallel -j1"

  def dev(path)
    path.sub(/\/dev\//,'')
  end

  def enc(path)
    File.join(Dir[path].first.split("/")[0..4])
  end
  
  def on(loc)
    cmd = "bash -c '#{PARALLEL} echo 1 \\> {} ::: #{loc}'"
    puts cmd
    system cmd
  end

  def off(loc)
    cmd = "bash -c '#{PARALLEL} echo 0 \\> {} ::: #{loc}'"
    puts cmd
    system cmd
  end

  
  def run(opts)
    case
    when opts["on"]
      epath = enc("/sys/class/enclosure/*/*/device/block/#{dev(opts["on"])}")
      on("#{epath}/*/locate")
    when opts["off"]
      epath = enc("/sys/class/enclosure/*/*/device/block/#{dev(opts["off"])}")
      off("#{epath}/*/locate")
    else
      raise "unknown option"
    end
  end

end

if $0 == __FILE__
  BlinkEnclosure.new.run(ARGV.getopts("", "on:", "off:"))  
end