systemctl: don't hit an assert if we try to reboot and dbus is dead

https://bugzilla.redhat.com/show_bug.cgi?id=889624

diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
index 0def1a2f5517b2ccc442f6838d3ee2d8908a1795..bfa4d45fc2d8c5ed7ad479314c200a9cef73c2ba 100644 (file)
--- a/src/systemctl/systemctl.c
+++ b/src/systemctl/systemctl.c
@@ -1738,6 +1738,9 @@ static int reboot_with_logind(DBusConnection *bus, enum action a) {
         const char *method;
         dbus_bool_t interactive = true;
 
+        if (!bus)
+                return -EIO;
+
         polkit_agent_open_if_enabled();
 
         switch (a) {