public domain declaration

diff --git a/src/sball.c b/src/sball.c
index e6ff48e..c8fed5b 100644 (file)
--- a/src/sball.c
+++ b/src/sball.c
@@ -1,3 +1,10 @@
+/* Serial spaceball and space-mouse example driver code for UNIX systems.
+ * Tested with Spaceball 4000FLX and Magellan SpaceMouse on GNU/Linux, FreeBSD,
+ * SGI/IRIX, and SunOS (Solaris/Illumos).
+ *
+ * Author: John Tsiombikas <nuclear@member.fsf.org>
+ * No copyright, public domain.
+ */
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>