csv_parse.rb

#!/usr/bin/env ruby
#
require "csv"
require "timeout"

bad_ips = []

time = ARGV[1].to_i || 3

CSV.foreach(ARGV[0], headers: true) do |row|
  return if row.nil?

  ip =  row["device_ip"]

  return if ip.nil?

  pid = Process.spawn("traceroute #{ip}")

  begin
    Timeout::timeout(time) {
      Process.wait(pid)
    }
  rescue Timeout::Error
    bad_ips << ip
    Process.kill('TERM', pid)
  end
end

puts "Here are the IPs that took longer than 30 seconds:"

puts bad_ips.inspect