> Linux is in the middle of adding new APIs like pidfd_send_signal, but none of them are aimed at improving the situation with grandchildren. Maybe Linux shoul

> Linux is in the middle of adding new APIs like pidfd_send_signal, but none of them are aimed at improving the situation with grandchildren. Maybe Linux should implement something like pidfd_getpfd() (returning the PID FD of the parent process) and pidfd_fork() (returning the PID FD of the child process).