Feature Request: Eio.Process.of_pid to "attach" the process_mgr to an existing process

[smondet]

No description provided.

[avsm]

What's your usecase for this? Exposing a pid lookup is inherently a racy operation (since the target process might have been recycled by the time you get there), so need to be careful from a security perspective.

[smondet]

My use-case is not super precise but the idea is to be able to signal/kill/monitor/await a process that already exists (for instance using a “pid-file” written by the process itself).