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//Program to 

import ftplib as ftp

import time

import os,signal

import subprocess

version = ""

c_version = "1"

session = ftp.FTP('192.168.1.100','iot_user','123123123')


#stop = 'sudo kill $(ps aux | grep CODE.py | awk '{{print $2}}')'

start = 'sudo python CODE.py'



def update(): 

#ftp.cwd('debian')

#session.retrlines('LIST') 

session.retrbinary('RETR README.txt', open('README.txt', 'wb').write)

with open('README.txt', 'r') as myfile:

version=myfile.read().replace('n', '')


if(version != c_version):

global c_version

session.retrbinary('RETR CODE.py', open('CODE.py', 'wb').write)

c_version = version

time.sleep(1)

check_kill_process("CODE.py")

print "STOP pass"

time.sleep(1)

proc = subprocess.Popen(start, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)

print "START Pass"

time.sleep(3)

print "UPDATED!"

else:

time.sleep(5)

print "NO UPDATES"


def check_kill_process(pstring):

    for line in os.popen("ps ax | grep " + pstring + " | grep -v grep"):

        fields = line.split()

        pid = fields[0]

        os.kill(int(pid), signal.SIGKILL)


while True:

try:

update()

except Exception as e:

session.quit()

print e 


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