custom fact

--- custom fact ---
Facter.add(:if_speed) do
  setcode do
    Facter::Core::Execution.exec('bash script')
  end
end
 
 
--- bash script ---
#!/bin/bash
for i in `ifconfig -a | sed 's/[ \t].*//;/^\(lo\|\)$/d'`; do
  ethtool $i | if [[ "Speed: 1000" ]]; then
    line=$(head -n 1)
    echo $line|awk '{print $3}'|sed 's/://'
  fi
done