From 56dfc25baf27372070ceb36ca6f3496ef0ab3ea1 Mon Sep 17 00:00:00 2001
From: Nikos Tsipinakis <nikos@tsipinakis.com>
Date: Wed, 19 Apr 2017 08:18:44 +0300
Subject: [PATCH] Add warning if RandR initialization fails

Since currently the multimonitor extension support is a compile-time
argument, there is not much we can do to recover from not being able to
initialize RandR other than print an error and exit.
---
 src/x11/screen.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/x11/screen.c b/src/x11/screen.c
index 3b197a8..efad643 100644
--- a/src/x11/screen.c
+++ b/src/x11/screen.c
@@ -77,7 +77,10 @@ int randr_event_base = 0;
 void init_screens()
 {
         int randr_error_base = 0;
-        XRRQueryExtension(xctx.dpy, &randr_event_base, &randr_error_base);
+        if (!XRRQueryExtension(xctx.dpy, &randr_event_base, &randr_error_base)) {
+                fprintf(stderr, "Dunst was compiled with RandR but RandR extension is missing.");
+                exit(1);
+        }
         XRRSelectInput(xctx.dpy, RootWindow(xctx.dpy, DefaultScreen(xctx.dpy)), RRScreenChangeNotifyMask);
         x_update_screens();
 }