gistfile1.rb

#!/usr/bin/env ruby
require 'pty'

interface = 'en0'
cmd = %W[tshark -i #{interface} -R http -T fields -e wlan.sa -e http.user_agent]
cmd = "yes"


begin
  PTY.spawn( cmd ) do |r, w, pid|
    while true
      r.each do |line|
        # Process dat line
        puts line
      end
    end
  end
rescue PTY::ChildExited => e
  puts 'OMGWTFBBQ'
end