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# return the set of active interfaces as an array
Facter.add("munin_interfaces") do
setcode do
`ip -o link show`.split(/\n/).collect do |line|
value = nil
matches = line.match(/^\d*: ([^:]*): <(.*,)?UP(,.*)?>/)
if !matches.nil?
value = matches[1]
end
value
end.compact.sort.join(" ")
end
end
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