How to stop airodump-ng subprocess in Python?

Question

What I am trying to do is record the output of airodump-ng every 10 seconds.

First attempt: Going through the airodump-ng documentation they mention such a command --write-interval When I tried using it:sudo airodump-ng mon0 -w testOutput --write-interval 10 -o csv, I got the error that --write-interval is an unrecognized option.

Second attempt: I tried doing this myself in Python. I then came accross the issue of trying to stop the process. The closest I got was this solution.

airodump = subprocess.Popen(['sudo', 'airodump-ng', 'mon0', '-w', 'pythonTest'], 
stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

o_airodump, unused_stderr = airodump.communicate(timeout=15)
airodump.kill()

This does stop the process, and I do have the relevant output files, BUT what happens is that all my running programs close and I get logged out of Ubuntu.

Additional Info:

Just before everything closes and I got logged out, I saw an error message on the terminal. I quickly screenshot it to see what it said:

Traceback (most recent call last):
  File "airodump-call.py", line 3, in <module> o_airodump, unused_stderr = airodump.communicate(timeout=15)
  File "/usr/lib/python3.5/subprocess.py", line 1072, in communicate stdout, stderr = self.communicate(input, endtime, timeout)
  File "usr/lib/python3.5/subprocess.py", line 1713, in _communicate raise TimeoutExpired(self.args, orig_timeout)
subprocess.TimeoutExpired: Command '['airodump-ng', 'mon0', '-w', 'pythonTest']' timed out after 15 seconds

Answer 1

I've run into the same problem. Despite this being an old post, I post my solution since it could help someone searching for this.

Let's say I run airodump-ng like the OP:

proc = subprocess.Popen(['airodump-ng', 'wlan0mon'])

This can be terminated by sending a SIGINT signal for the pid of the process:

os.kill(proc.pid, signal.SIGINT)

Note: you need import os and import signal