fbcli: Quit main loop on CTRL-C / SIGTERM

This makes sure we invoke the cleanup function correctly and allows
to test running event handling.

cli/fbcli.c

@@ -8,6 +8,7 @@
 
 #include <glib.h>
 #include <gio/gio.h>
+#include <glib-unix.h>
 
 #include <locale.h>
 
@@ -15,6 +16,15 @@
 
 static GMainLoop *loop;
 
+static gboolean
+on_shutdown_signal (gpointer unused)
+{
+  /* End right away, lfb_uninit will end running feedback */
+  g_main_loop_quit (loop);
+
+  return FALSE;
+}
+
 static gboolean
 on_watch_expired (gpointer unused)
 {
@@ -55,6 +65,9 @@ trigger_event(const char *name, gint timeout)
   g_autoptr(GIOChannel) input = NULL;
   int success = FALSE;
 
+  g_unix_signal_add (SIGTERM, on_shutdown_signal, NULL);
+  g_unix_signal_add (SIGINT, on_shutdown_signal, NULL);
+
   g_print("Triggering feedback for event '%s'\n", name);
   event = lfb_event_new (name);
   lfb_event_set_timeout (event, timeout);