I'm really not sure what you are asking here, so bear with me...
The tmpfiles.d fragment is documented in the tmpfiles.d(5)[0] and the tmpfiles utility is documented in systemd-tmpfiles(8)[1].
Both in systemd and initscripts we call "/usr/bin/systemd-tmpfiles --clean" to clean up old files.
If you want to add your own custom stuff instead then in initscripts you'd make a hook (as before) and in systemd you'd add a .service file [2].
Fair enough and Thanks. I'll likely find out more about systemd malleability in due course some time anyway. I just don't use the system with it very often. ________________________________________________________ Why not do something good every day and install BOINC. ________________________________________________________