mtenv.py

"""
Original code from http://rachelbythebay.com/w/2017/01/30/env/
"""

import ctypes
import os
import random
import string
import threading


def worker():
    """Loop in thread, for a while"""
    while True:
        variable = "".join(random.sample(string.ascii_uppercase, 8))
        #print(f"{variable}='test'")
        os.putenv(variable, "test")


def get_getenv():
    libc = ctypes.cdll.LoadLibrary("libc.so.6")
    getenv = libc.getenv
    getenv.restype = ctypes.c_char_p
    getenv.argtypes = [ctypes.c_char_p]
    return getenv


def main():
    os.putenv("foo", "bar")
    thread = threading.Thread(target=worker)
    thread.start()
    getenv = get_getenv()

    while True:
        whats_my_foo = getenv(b"foo\x00")


if __name__ == "__main__":
    main()