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
(cherry picked from commit 3d0ef5c7e00155bc74f6f71c34cad518a4ff56ba)

1 files changed, 10 insertions, 0 deletions

diff --git a/src/login/logind.c b/src/login/logind.c
index 5320820a5..c5d526b4b 100644
--- a/src/login/logind.c
+++ b/src/login/logind.c
@@ -154,6 +154,10 @@ static Manager* manager_unref(Manager *m) {
         sd_event_source_unref(m->udev_button_event_source);
         sd_event_source_unref(m->lid_switch_ignore_event_source);
 
+#if ENABLE_UTMP
+        sd_event_source_unref(m->utmp_event_source);
+#endif
+
         safe_close(m->console_active_fd);
 
         udev_monitor_unref(m->udev_seat_monitor);
@@ -1144,6 +1148,9 @@ static int manager_startup(Manager *m) {
 #if 1 /// elogind needs some extra preparations before connecting...
         elogind_manager_startup(m);
 #endif // 1
+        /* Connect to utmp */
+        manager_connect_utmp(m);
+
         /* Connect to console */
         r = manager_connect_console(m);
         if (r < 0)
@@ -1201,6 +1208,9 @@ static int manager_startup(Manager *m) {
         manager_reserve_vt(m);
 #endif // 0
 
+        /* Read in utmp if it exists */
+        manager_read_utmp(m);
+
         /* And start everything */
         HASHMAP_FOREACH(seat, m->seats, i)
                 (void) seat_start(seat);