uvloop simply disable SIGCHLD?

[ZhuYuJin]

• uvloop version: 0.14.0
• Python version: 3.6.8
• Platform: linux
• Can you reproduce the bug with PYTHONASYNCIODEBUG in env?:
• Does uvloop behave differently from vanilla asyncio? How?: uvloop cannot add SIGCHLD handler

I need to monitor child process exit.

loop.add_signal_handler(signal.SIGCHLD, handle_child_exit)

However, uvloop simply disable the signal with the following error. RuntimeError: cannot add a signal handler for SIGCHLD: it is used by the event loop to track subprocesses

Is there any solution to support SIGCHLD?

[1st1]

Not right now, but doable in principle. We just need to allow users to provide a handler for SIGCHLD while making sure that libuv receives it too.