I still think 64 bit non reused pids are the best long term solution. There are other pid race conditions. (Not having pid files deleted on reboot is a differen

I still think 64 bit non reused pids are the best long term solution. There are other pid race conditions. (Not having pid files deleted on reboot is a different issue of course). Although the Capsicum model (in FreeBSD, slowly getting into Linux) where you can have file descriptors for processes is another different model.