在Django中分叉后关闭TCP端口80和443

Question

I am trying to fork() and exec() a new python script process from within a Django app that is running in apache2/WSGI Python. The new python process is daemonized so that it doesn't hold any association to apache2, but I know the HTTP ports are still open. The new process kills apache2, but as a result the new python process now holds port 80 and 443 open, and I don't want this.

How do I close port 80 and 443 from within the new python process? Is there a way to gain access to the socket handle descriptors so they can be closed?

Answer 1

If you use the subprocess module to execute the script, the close_fds argument to the Popen constructor will probably do what you want:

If close_fds is true, all file descriptors except 0, 1 and 2 will be closed before the child process is executed.

Assuming they weren't simply closed, the first three file descriptors are traditionally stdin , stdout and stderr , so the listening sockets in the Django application will be among those closed in the child process.