logind: optionally watch utmp for login data

This allows us to determine the TTY an ssh session is for, which is
useful to to proper idle detection for ssh sessions.

Fixes: #9622

1 files changed, 8 insertions, 0 deletions

diff --git a/src/login/logind.h b/src/login/logind.h
index 9bdfbdfeee..0cccecb5ed 100644
--- a/src/login/logind.h
+++ b/src/login/logind.h
@@ -44,6 +44,10 @@ struct Manager {
         sd_event_source *udev_vcsa_event_source;
         sd_event_source *udev_button_event_source;
 
+#if ENABLE_UTMP
+        sd_event_source *utmp_event_source;
+#endif
+
         int console_active_fd;
 
         unsigned n_autovts;
@@ -151,6 +155,10 @@ bool manager_is_docked_or_external_displays(Manager *m);
 bool manager_is_on_external_power(void);
 bool manager_all_buttons_ignored(Manager *m);
 
+int manager_read_utmp(Manager *m);
+void manager_connect_utmp(Manager *m);
+void manager_reconnect_utmp(Manager *m);
+
 extern const sd_bus_vtable manager_vtable[];
 
 int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *error);