Dear Maintainer,
With the move of /etc/pam.d/login to /usr/lib/pam.d/login in
util-linux 1:4.16.0-2+really2.42.1-4, the greetd service can't start:
juin 16 09:02:45 mobian systemd[1]: Started greetd.service - Greeter daemon.
juin 16 09:02:46 mobian greetd[10059]: error: authentication error: abort error: pam_start: ABORT
juin 16 09:02:46 mobian greetd[10059]: PAM _pam_load_conf_file: unable to open config for /etc/pam.d/login
juin 16 09:02:46 mobian greetd[10041]: unable to start greeter: session start failed: authentication error: abort error: pam_start: ABORT
juin 16 09:02:46 mobian greetd[10059]: PAM error loading (null)
juin 16 09:02:46 mobian greetd[10059]: PAM _pam_init_handlers: error reading /etc/pam.d/greetd-greeter
juin 16 09:02:46 mobian greetd[10059]: PAM _pam_init_handlers: [Critical error - immediate abort]
juin 16 09:02:46 mobian greetd[10059]: PAM error reading PAM configuration file
juin 16 09:02:46 mobian greetd[10059]: PAM pam_start: failed to initialize handlers
juin 16 09:02:46 mobian systemd[1]: greetd.service: Main process exited, code=exited, status=1/FAILURE
juin 16 09:02:46 mobian systemd[1]: greetd.service: Failed with result 'exit-code'.
A symlink workaround that issue.
See https://bugs.debian.org/1140029 for futher discussion about the
util-linux / pam issue.