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-rw-r--r--src/config.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/config.h b/src/config.h
index 261b96e..fc8bf75 100644
--- a/src/config.h
+++ b/src/config.h
@@ -77,5 +77,14 @@
#endif
+/**
+ * The name of the environment variable that
+ * indicates the index of the display
+ */
+#ifndef DISPLAY_ENV
+#define DISPLAY_ENV "MDS_DISPLAY"
+#endif
+
+
#endif