Created attachment 181523 [details] Add /dev/full Please add /dev/full to devfs ruleset devfsrules_unhide_basic, alongside with /dev/null and /dev/zero /dev/full [1] is a devices, which returns ENOSPC on write. It is used e. g. in applications regression tests. Adding /dev/full to devfsrules_unhide_basic will expose this device into jails by default. Given how this device works it should be safe to do. Having /dev/full in jail by default will simplify running port tests in jails using 'poudriere testport -i'. [1] https://lists.freebsd.org/pipermail/svn-src-all/2014-April/084195.html