expirerm is a script that removes a list of files. The specified file lists the files to be removed. It
is usually created by expire-z. This file is sorted, and then fed into a pipeline responsible for doing
the removal, normally fastrm. (You may want to edit expirerm to change the flags passed to fastrm.)
If there seemed to be a problem removing the files, then a mail is sent to the news administrator. If
there were no problems, then file is renamed to pathlog/expire.list where it is kept (for safety) until
the next time expiration is done.