Comment 3 for bug 1548947

Not only is /var/tmp the directory for that the Canon created "dirvers" fills with the cnij files, I now see folders named, in part, "systemd-private-" (The quotation marks are mine, they don't appear in the ls of /var/tmp.) I had posted to the Canon Printer Forum about this and had no response as to whether I could "sudo rm -r systemd-private*" I went ahead and removed them and have seen no ill effects from printing, faxing, scanning or copying documents, other than the Canon created software adding directories and files unnecessarily. You can see the post at the Canon forum at:

http://community.usa.canon.com/t5/Office-Printers/Canon-drivers-for-Linux-not-deleting-Private-Tmp-folders-for/m-p/175472#U175472