logind: do not use an uninitialized variable

We requested various fields using SD_BUS_CREDS_AUGMENT but at least
sd_bus_creds_get_tty can fail with ENXIO, not setting the output variable.

diff --git a/src/login/logind-dbus.c b/src/login/logind-dbus.c
index 81e40082a71a2c496413caad83ba95a0f2b5ce92..1058a687ba86aca32ad53f0a1bdca7888b8d677c 100644 (file)
--- a/src/login/logind-dbus.c
+++ b/src/login/logind-dbus.c
@@ -124,7 +124,6 @@ int manager_get_seat_from_creds(Manager *m, sd_bus_message *message, const char
                         return r;
 
                 seat = session->seat;
-
                 if (!seat)
                         return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_SEAT, "Session has no seat.");
         } else {
@@ -1995,7 +1994,7 @@ static int method_schedule_shutdown(sd_bus_message *message, void *userdata, sd_
 
         r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
         if (r >= 0) {
-                const char *tty;
+                const char *tty = NULL;
 
                 (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
                 (void) sd_bus_creds_get_tty(creds, &tty);