#!/usr/bin/env ruby

interfaces = `ifconfig`.scan( /^(\w+)/ ).flatten.delete_if{ |interface| interface =~ /lo/ }
arr = interfaces.inject( [] ) do |arr,interface|
  md = `ifconfig #{interface}`.match( /((\d+\.){3}\d+)/ )
  arr << "#{interface}: #{md.captures.first}" if md
  arr
end
print arr.join( ' ' )