Don't allow noop output to be configured

1 files changed, 8 insertions, 0 deletions

diff --git a/sway/commands/output.c b/sway/commands/output.c
index 74ca9d0b..85b7fd23 100644
--- a/sway/commands/output.c
+++ b/sway/commands/output.c
@@ -1,3 +1,4 @@
+#include <strings.h>
 #include "sway/commands.h"
 #include "sway/config.h"
 #include "sway/output.h"
@@ -26,6 +27,13 @@ struct cmd_results *cmd_output(int argc, char **argv) {
                 return error;
         }
 
+        // The NOOP-1 output is a dummy output used when there's no outputs
+        // connected. It should never be configured.
+        if (strcasecmp(argv[0], "NOOP-1") == 0) {
+                return cmd_results_new(CMD_FAILURE,
+                                "Refusing to configure the no op output");
+        }
+
         struct output_config *output = new_output_config(argv[0]);
         if (!output) {
                 sway_log(SWAY_ERROR, "Failed to allocate output config");