Some threads do background tasks, like sending keepalive packets, or performing periodic garbage collection, or whatever. These are only useful when the main program is running, and it’s okay to kill them off once the other, non-daemon, threads have exited. Without daemon threads, you’d have to keep track of them, and tell them to exit, … Read more
You could start your php script from the command line (i.e. bash) by using nohup php myscript.php & the & puts your process in the background. Edit: Yes, there are some drawbacks, but not possible to control? That’s just wrong. A simple kill processid will stop it. And it’s still the best and simplest solution.
A class based clean to use solution: import signal import time class GracefulKiller: kill_now = False def __init__(self): signal.signal(signal.SIGINT, self.exit_gracefully) signal.signal(signal.SIGTERM, self.exit_gracefully) def exit_gracefully(self, *args): self.kill_now = True if __name__ == ‘__main__’: killer = GracefulKiller() while not killer.kill_now: time.sleep(1) print(“doing something in a loop …”) print(“End of the program. I was killed gracefully :)”)
I was trying to understand the double fork and stumbled upon this question here. After a lot of research this is what I figured out. Hopefully it will help clarify things better for anyone who has the same question. In Unix every process belongs to a group which in turn belongs to a session. Here … Read more
Copying my own answer from How do I run a Node.js application as its own process? 2015 answer: nearly every Linux distro comes with systemd, which means forever, monit, PM2, etc are no longer necessary – your OS already handles these tasks. Make a myapp.service file (replacing ‘myapp’ with your app’s name, obviously): [Unit] Description=My … Read more
Current solution A reference implementation of PEP 3143 (Standard daemon process library) is now available as python-daemon. Historical answer Sander Marechal’s code sample is superior to the original, which was originally posted in 2004. I once contributed a daemonizer for Pyro, but would probably use Sander’s code if I had to do it over.
While jkp‘s solution works, the newer way of doing things (and the way the documentation recommends) is to use the subprocess module. For simple commands its equivalent, but it offers more options if you want to do something complicated. Example for your case: import subprocess subprocess.Popen([“rm”,”-r”,”some.file”]) This will run rm -r some.file in the background. … Read more