webcam_detection_prototype.py

import asyncio
import logging
import sys

import pyinotify

# Configure the logger
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)
console_handler = logging.StreamHandler(sys.stdout)
console_handler.setFormatter(logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s'))
logger.addHandler(console_handler)


class EventHandler(pyinotify.ProcessEvent):
    def process_default(self, event):
        if event.pathname.startswith('/dev/video'):
            if event.mask & pyinotify.IN_OPEN:
                logger.info("Webcam is being used!")
            elif event.mask & pyinotify.IN_CLOSE_WRITE \
                    or event.mask & pyinotify.IN_CLOSE_NOWRITE \
                    or event.mask & pyinotify.IN_DELETE_SELF:
                logger.info("Webcam stopped being used!")


async def main():
    wm = pyinotify.WatchManager()
    mask = pyinotify.IN_CLOSE_WRITE | pyinotify.IN_OPEN
    handler = EventHandler()
    notifier = pyinotify.Notifier(wm, handler)

    wm.add_watch('/dev', mask, rec=True)

    try:
        logger.info("Watching for changes in /dev directory...")
        notifier.loop()
    except KeyboardInterrupt:
        logger.info("Stopping watch.")


if __name__ == '__main__':
    loop = asyncio.get_event_loop()
    loop.run_until_complete(main())