I'm wondering if this is the correct way to execute a system process and detach from parent, though allowing the parent to exit without creating a zombie and/or killing the child process. I'm currently using the subprocess module and doing this... os.setsid() os.umask(0) p = subprocess.Popen(['nc', '-l', '8888'], cwd=self.home, stdout=subprocess.PIPE, stderr=subprocess.STDOUT) os.setsid() changes the process group, which I believe is what lets the process continue running when it's parent exits, as it no longer belongs to the same process group. Is this correct and also is this a reliable way of performing this? Basically, I have a remote control utility that communicate through sockets and allows to start processes remotely, but I have to ensure that if the remote control dies, the processes it started continue running unaffected. I was reading about double-forks and not sure if this is necessary and/or subprocess.POpen close_fds somehow takes care of that and all that's needed is to change the process group? Continue reading...
