# return the set of active interfaces as an array
# taken from http://git.black.co.at
# modified by nico <nico@gcu.info> to add FreeBSD & Solaris support
 
Facter.add("munin_interfaces") do
 
	setcode do
		# linux
		if Facter.value('kernel') == "Linux" then
			`ip -o link show`.split(/\n/).collect do |line|
					value = nil
					matches = line.match(/^\d*: ([^:]*): <(.*,)?UP(,.*)?>/)
					if !matches.nil?
						value = matches[1]
						value.gsub!(/@.*/, '')
					end
					value
			end.compact.sort.join(" ")
		#end
 
		# freebsd
		elsif Facter.value('kernel') == "FreeBSD" then
			Facter.value('interfaces').split(/,/).collect do |interface|
				status = `ifconfig #{interface} | grep status`
				if status != "" then
					status=status.strip!.split(":")[1].strip!
					if status == "active" then # I CAN HAZ LINK ?
						interface.to_a
					end
				end
			end.compact.sort.join(" ")
		#end
 
		# solaris
		elsif Facter.value('kernel') == "SunOS" then
			Facter.value('interfaces').split(/,/).collect do |interface|
				if interface != "lo0" then # /dev/lo0 does not exists
					status = `ndd -get /dev/#{interface} link_status`.strip!
					if status == "1" # ndd returns 1 for link up, 0 for down
						interface.to_a
					end
				end
			end.compact.sort.join(" ")
		end
	end
end