* Mathieu Desnoyers: >>> I'd like to offer a userspace API which allows safe stashing of >>> unreachable file descriptors on a service thread. >> By "safe" here do you mean not accessible via pidfd_getfd()? No, unreachable by close/close_range/dup2/dup3. I expect we can do an intra-process transfer using /proc, but I'm hoping for something nicer. Thanks, Florian