text: #!/usr/bin/python
  """Copyright 2013 Bryan Irvine
  
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  
     http://www.apache.org/licenses/LICENSE-2.0
  
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License."""
  
  import re
  import sys
  import time
  import socket
  import platform
  import subprocess
  import pickle
  import struct
  
  CARBON_SERVER = '127.0.0.1'
  CARBON_PICKLE_PORT = 2004
  DELAY = 60
  
  def get_loadavg():
      """
      Get the load average for a unix-like system.
      For more details, "man proc" and "man uptime"
      """
      if platform.system() == "Linux":
          return open('/proc/loadavg').read().split()[:3]
      else:
          command = "uptime"
          process = subprocess.Popen(command, stdout=subprocess.PIPE, shell=True)
          stdout = process.communicate()[0].strip()
          # Split on whitespace and commas
          output = re.split("[\s,]+", stdout)
          return output[-3:]
  
  def run(sock, delay):
      """Make the client go go go"""
      while True:
          now = int(time.time())
          tuples = ([])
          lines = []
          #We're gonna report all three loadavg values
          loadavg = get_loadavg()
          tuples.append(('system.loadavg_1min', (now,loadavg[0])))
          tuples.append(('system.loadavg_5min', (now,loadavg[1])))
          tuples.append(('system.loadavg_15min', (now,loadavg[2])))
          lines.append("system.loadavg_1min %s %d" % (loadavg[0], now))
          lines.append("system.loadavg_5min %s %d" % (loadavg[1], now))
          lines.append("system.loadavg_15min %s %d" % (loadavg[2], now))
          message = '\n'.join(lines) + '\n' #all lines must end in a newline
          print("sending message")
          print('-' * 80)
          print(message)
          package = pickle.dumps(tuples, 1)
          size = struct.pack('!L', len(package))
          sock.sendall(size)
          sock.sendall(package)
          time.sleep(delay)
  
  def main():
      """Wrap it all up together"""
      delay = DELAY
      if len(sys.argv) > 1:
          arg = sys.argv[1]
          if arg.isdigit():
              delay = int(arg)
          else:
              sys.stderr.write("Ignoring non-integer argument. Using default: %ss\n" % delay)
  
      sock = socket.socket()
      try:
          sock.connect( (CARBON_SERVER, CARBON_PICKLE_PORT) )
      except socket.error:
          raise SystemExit("Couldn't connect to %(server)s on port %(port)d, is carbon-cache.py running?" % { 'server':CARBON_SERVER, 'port':CARBON_PICKLE_PORT })
  
      try:
          run(sock, delay)
      except KeyboardInterrupt:
          sys.stderr.write("\nExiting on CTRL-c\n")
          sys.exit(0)
  
  if __name__ == "__main__":
      main()
  