> We could have that in *nix land, you know.. something like opening /proc/$victim/status and using it to wait for the process and keep its PID from being reuse

> We could have that in *nix land, you know.. something like opening /proc/$victim/status and using it to wait for the process and keep its PID from being reused until this is closed. We are going to soon: "The 5.3 kernel also adds the ability to pass a pidfd to poll(), which will provide a notification when the process represented by that pidfd exits." (https://lwn.net/SubscriberLink/794707/905eb6b5b7287e77/ https://lwn.net/SubscriberLink/794707/905eb6b5b7287e77/)