Add basic backlight percentage support

At the moment linux only, but will add support for OpenBSD as well.

1 files changed, 2 insertions, 0 deletions

diff --git a/util.h b/util.h
index b474f88..f55c0eb 100644
--- a/util.h
+++ b/util.h
@@ -1,4 +1,6 @@
 /* See LICENSE file for copyright and license details. */
+#include <stddef.h>
+
 extern char buf[1024];
 
 #define LEN(x) (sizeof (x) / sizeof *(x))