nic fact for puppet gathers speed, duplex, state, slaves, device module, carrier, etc

nic.rb

# Fact: nic { speed, state, duplex, ... }
#
# Copyright: Jeffrey Clark
# License: GPLv3 

require 'pathname'

nic = Hash.new
ifaces = Facter.value(:interfaces)

if ifaces and Facter.value(:kernel) == 'Linux'
  ifaces.split(',').each do |iface|
    iface_path = "/sys/class/net/#{iface}"
    if File.exists?("#{iface_path}/speed")
      nic_iface = Hash.new
      sys_path = Pathname.new("#{iface_path}").realpath
      if sys_path.to_s =~ /\/virtual\//
        nic_iface['virtual'] = true
      end
      device_path = sys_path + 'device'
      if device_path.exist?
        device_path = device_path.realpath
        nic_iface['device'] = {
          'subsystem' => (device_path+'subsystem').realpath.basename.to_s
        }
        driver_path = device_path + 'driver'
        if driver_path.exist?
          nic_iface['device']['module'] = (driver_path+'module').realpath.basename.to_s
        end
      end

      master_path = sys_path + 'master'
      if master_path.exist?
        nic_iface['master'] = master_path.realpath.basename.to_s
      end
      slaves = sys_path.children.select { |child| child.basename.fnmatch('lower_*') }
      if slaves.count > 0
        nic_iface['slaves'] = slaves.map { |child|
          child.basename.to_s[6..-1]
        }
      end

      ['dormant', 'speed', 'operstate', 'carrier', 'duplex', 'carrier_changes'].each { |x|
        begin
            result = IO.read("#{iface_path}/#{x}").chomp
            begin
              Float(result)
              nic_iface[x] = result.to_i
            rescue
              nic_iface[x] = result
            end
        rescue
        end
      }
      nic[iface] = nic_iface
    end
  end
end

Facter.add(:nic) do
  confine :kernel => "Linux"
  setcode do
    nic
  end
end