As a daemontools fan, I'm frustrated that something in the daemontools family never became popular (process supervision, be it daemontools, upstart, systemd, etc. makes managing services so much nicer). But I do recognize the utility of using cgroups as part of this. Is there, or could there be, a "do one thing" utility that can launch a process in its own cgroup, such that it would fit in nicely in a daemontools-style run script?