From your other comments I can tell you're a seasoned daemontools user, so let me just put in a quick plug for daemontools-encore [1]. Like runit, daemontools-encore can now run services in separate process groups with setsid(1). Why is this so darn important? Well, under classic daemontools a ./run file with a pipeline in it -- or really anything that forked -- would spin off orphans every time you did `svc -t|-k`. Very bad stuff to deal with in a production environment.

[1] http://untroubled.org/daemontools-encore/