the Subreaper https://medium.com/@william.la.martin/dont-fear-the-subreaper-19c8127c031e ɾDealing with process termination in Linux (with Rust examples) https://iximiuz.com/en/posts/dealing-with-processes-termination-in-Linux/#awaiting-a-grandchild-process-termination ɾprctl(2) — Linux manual page https://man7.org/linux/man-pages/man2/prctl.2.html