Facter.add(:macaddress) do
    confine :operatingsystem => %w{Solaris Linux Fedora RedHat CentOS SuSE Debian Gentoo Ubuntu}
    setcode do
        ether = []
        output = %x{/sbin/ifconfig -a}
        output.each {|s|
                     ether.push($1) if s =~ /(?:ether|HWaddr) (\w{1,2}:\w{1,2}:\w{1,2}:\w{1,2}:\w{1,2}:\w{1,2})/
                    }
        ether[0]
    end
end

Facter.add(:macaddress) do
    confine :operatingsystem => %w{FreeBSD OpenBSD}
    setcode do
    ether = []
        output = %x{/sbin/ifconfig}
        output.each {|s|
                     if s =~ /(?:ether|lladdr)\s+(\w\w:\w\w:\w\w:\w\w:\w\w:\w\w)/
                          ether.push($1)
                     end
                    }
        ether[0]
    end
end

Facter.add(:macaddress) do
    confine :kernel => :darwin
    setcode do
        ether = nil
        output = %x{/sbin/ifconfig}

        output.split(/^\S/).each { |str|
            if str =~ /10baseT/ # we're wired
                str =~ /ether (\w\w:\w\w:\w\w:\w\w:\w\w:\w\w)/
                ether = $1
            end
        }

        ether
    end
end

Facter.add(:macaddress) do
    confine :kernel => %w{AIX}
    setcode do
        ether = []
        ip = nil
        output = %x{/usr/sbin/ifconfig -a}
        output.each { |str|
            if str =~ /([a-z]+\d+): flags=/
                devname = $1
                unless devname =~ /lo0/
                   output2 = %x{/usr/bin/entstat #{devname}}
                   output2.each { |str2|
                               if str2 =~ /^Hardware Address: (\w{1,2}:\w{1,2}:\w{1,2}:\w{1,2}:\w{1,2}:\w{1,2})/
                                  ether.push($1)
                               end
                               }
                end
            end
        }
        ether[0]
    end
end

Facter.add(:macaddress) do
    confine :kernel => %w(windows)
    setcode do
	ether = []
	output = %x{ipconfig /all}
	output.split(/\r\n/).each  do |str|
	    if str =~  /.*Physical Address.*: (\w{1,2}-\w{1,2}-\w{1,2}-\w{1,2}-\w{1,2}-\w{1,2})/
		ether.push($1.gsub(/-/, ":"))
	    end
	end
	ether[0]
    end
end