#!/usr/bin/env python3

import sys
import logging
from subprocess import check_call

from zhypervisor.logging import setup_logging


def main():
    """
    Helper script for dealing with QEMU network interfaces. When QEMU starts, it calls this script passing an interface
    name when the virtual machine has been started with it. This needs to enable the interface.
    """
    setup_logging()
    _, tap_name = sys.argv
    logging.info("Enabling interface %s...", tap_name)
    check_call(["brctl", "addif", "br0", tap_name])
    check_call(["ifconfig", tap_name, "up"])
    logging.info("Enabled interface %s", tap_name)

if __name__ == '__main__':
    main()