在控制-D上退出子进程？

Question

I am trying to stop a server which is a subprocess when the parent process gets killed by a cntrl-D(EOF on stdin). I tried many ways including reading stdin in the subprocess but that blocks all keyboard input. Is there a way to kill the subprocess when the parent process encounters a EOF.

Creating a subprocess in python via subprocess.Popen

polling for EOF in subprocess by this:

self.t = threading.Thread(target=self.server.serve_forever)
self.t.start()
# quit on cntrl-d (EOF)
while True:
    if len(sys.stdin.readline()) == 0:
        self.stop()

def stop(self):
    manager.save()
    # shutdown bottle
    self.server.shutdown()
    # close socket
    self.server.server_close()
    self.t.join()
    sys.exit()

Answer 1

with @thatotherguy 's suggestion of using os.getppid(), here is the new working solution to end the child process when it is orphaned by the parent (ie. when a control-D occurs on the parent and it closes without signaling the child)

self.t = threading.Thread(target=self.server.serve_forever)
self.t.start()
# quit on cntrl-d (EOF)
if os.getppid() != 1:
    while True:
        if os.getppid() == 1:
            self.stop()
        else:
            time.sleep(1)