https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292667

            Bug ID: 292667
           Summary: cron / at: Move /var/cron/{allow,deny} and
                    /var/at/at.{allow,deny} to /etc
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bin
          Assignee: [email protected]
          Reporter: [email protected]

Currently cron and at both have allow/deny list but they currently live under
/var/cron and /var/at.

Because these are essentially configuration files, they should live under /etc
per hier(7).

We intend to install an empty /etc/cron.deny by default (per POSIX, when
cron.allow and cron.deny are missing, cron should treat it as disallowing
unprivileged users, and an empty /etc/cron.deny would maintain the current
behavior).

To respect POLA, cron would be modified to check if /var/cron/{allow,deny} are
present, and use them while emitting a warning in both console and log, nagging
users until they perform the move, for example:

[ -f /var/cron/allow ] && mv /var/cron/allow /etc/cron.allow && ln -s
/etc/cron.allow /var/cron/allow
[ -f /var/cron/deny ] && mv /var/cron/deny /etc/cron.deny && ln -s
/etc/cron.deny /var/cron/deny

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