Do something with Apache's root PID before it forks

Question

I need to set a property on the root Apache process which in inherited by its children (e.g. oom_adj, cgroup membership). However, Apache will fork itself as soon as it starts.

• Using $$ in the init.d script doesn't seem to work - nothing is affected after the init script exits.
• Using the value from the PID file is too late - only the root process is affected, after it has created workers.

Any solutions? (aside from hacky ideas like enumerating "apache2" processes)

Answer 1

Using $$ in the init.d script didn't work, but using it in a separate script called by the init.d script worked.