!/usr/bin/env ruby

require 'socket'
require 'rubygems'
require 'net/ssh'

File.open(ARGV[0], "r") do |infile|
    while (line = infile.gets)
        host,username,password,command = line.chomp.split(',')

        Thread.new {
            if username == nil || password == nil then
                puts "#{host}: No username or password, skipping"
                Thread.exit
            end

            begin
                TCPSocket.new(host, 22)
            rescue
                puts "#{host}: Unknown host, skipping"
                Thread.exit
            end

            Net::SSH.start( host, username, :password => password) do |ssh|
                puts "#{host}: #{ssh.exec! command}"
            end
        }
    end

    while Thread.list.size > 1 do
       sleep 5
    end
end