X entries inherit the cleanup age from the closest parent directory rule.
Inherit the age-by fields too, so parent rules such as m:1d keep their
full cleanup policy.
Reproducer:
mkdir -p /tmp/tmpfiles-ageby/parent/{child,other}
printf old >/tmp/tmpfiles-ageby/parent/child/file
printf old >/tmp/tmpfiles-ageby/parent/other/file
touch -d '3 days ago' /tmp/tmpfiles-ageby/parent/{child,other}/file
systemd-tmpfiles --clean - <<'EOT'
d /tmp/tmpfiles-ageby/parent - - - m:1d
X /tmp/tmpfiles-ageby/parent/child - - - -
EOT
Before:
child/file remained because X used the default age-by set.
other/file was removed by the parent m: rule.
Follow-up for 7f7a50dd15.
System and Service Manager
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