crude command runner

get_cmd.rb

#!/usr/bin/env ruby


=begin

reads contents of a file hosted on a web server, then executes the commands.
security holes? yes, probably...

=end

require 'open-uri'


def get_iface
  @iface = %x(/usr/local/bin/active_net_service.sh).chomp
  return @iface
end

def get_ip
  iface = get_iface
  @ip =`/usr/sbin/networksetup -getinfo #{iface} | awk '/^IP address:/ {print $NF}'`.chomp
  return @ip
end

def check_empty
  iface = get_iface
  while iface.empty?
    puts "no interface is active. waiting for a few seconds."
    #%x(logger -t startup "no interface is active.")
    sleep(10)
    iface = get_iface
  end
end

def match_ip
  ip = get_ip
  if ip.match(/^169.*/)
      message = "stop right there. you have a self assigned IP."
      puts message
      %x(logger -t startup #{message})
      exit(1)
    else
      if ip.match(/\b(?:\d{1,3}\.){3}\d{1,3}\b/) 
        puts "you have: #{ip}"
        %x(logger -t startup "running startup script...")
        open("http://company.com/start.sh") {|f|
            f.each_line {|line|  system(line.chomp)}
          }
        %x(logger -t startup "finished startup script.")
        exit(0)
    end
  end
end

check_empty
match_ip