Bug#1130765: Do not run systemctl enable getty at .service unconditionally on each upgrade

[Michael Biebl]

Package: systemd
Version: 260~rc4-1
Severity: normal

I have kmscon installed and enabled:

# systemctl enable kmsconvt at .service
Created symlink '/etc/systemd/system/autovt at .service' → '/usr/lib/systemd/system/kmsconvt at .service'.
Created symlink '/etc/systemd/system/getty.target.wants/kmsconvt at tty1.service' → '/usr/lib/systemd/system/kmsconvt at .service'.


systemd.postinst runs "systemctl enable getty at .service" unconditionally,
which leads to the following error message
Failed to enable unit: File '/etc/systemd/system/autovt at .service' already exists and is a symlink to /usr/lib/systemd/system/kmsconvt at .service

bug systemctl also creates
/etc/systemd/system/getty.target.wants/getty at tty1.service

(via DefaultInstance=tty1)


getty at tty1.service and kmsconvt at tty1.service conflict with each other.

I thus suggest running "systemctl enable getty at .service" only on new
installs and as a one-upgrade upgrade.
The explicit "systemctl enable getty at tty1.service" can be dropped
accordingly.