Emulate evdev inside a container

If I create a mount namespace with unshare or a more sophisticated tool like Docker, can I emulate an input device using a userspace process on the host? I'm aware of /dev/uinput as a mechanism for emulating input devices, but it doesn't hew to any sort of namespacing (to my knowledge). Instead, I would like to mount a normal file inside the container, but somehow handle ioctls done on it, and in doing so act like evdev to simulate an input device. Is such a thing possible on Linux? Am I missing something in my understanding (ioctls are pretty mysterious to me)?