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According to https://systemd.io/CONTAINER_INTERFACE/, systemd will try take control over /dev/ttyN if exported, which can cause conflicts with the host's tty in privileged containers. Thus we will not expose these to privileged containers in systemd mode, as this is a bad idea according to systemd's maintainers. Additionally, this commit adds a bats regression test to check that no /dev/ttyN are present in a privileged container in systemd mode This fixes https://github.com/containers/podman/issues/15878 Signed-off-by: Dan Čermák <dcermak@suse.com>