irb.rb

irbbarnekr@saturnino ~ $ irb
>> def wham(mark, list)
>>   list.each {|item| puts "#{item} got whammed!"}
>> end
=> nil
>> def subscribe(mark, list, callback)
>>   callback.call(mark, list)
>> end
=> nil
>> subscribe('one', %w[buddy guy], Proc.new {|*args| wham(*args)})
buddy got whammed!
guy got whammed!
=> ["buddy", "guy"]
>> 

kismet.rb

#!/usr/bin/env ruby

require 'socket'
require 'time'
require 'kismet'

def bssidcb(proto, fields)
        puts "Kismet saw network #{fields['bssid']} manuf #{fields['manuf']} on channel #{fields['channel']}"
end

def bssiddiecb(text)
        puts "BSSID ack"
        $k.kill
        exit
end

$k = Kismet.new()

$k.connect()

$k.run()

$k.subscribe("bssid", ["bssid", "manuf", "channel"], Proc.new {|*args| bssidcb(*args)}, Proc.new {|*args| bssiddiecb(*args)})

$k.wait()