Added public files
Roughly added all public files. Probably missed some, though.
diff --git a/sys/input_to.h b/sys/input_to.h
new file mode 100644
index 0000000..f7f094f
--- /dev/null
+++ b/sys/input_to.h
@@ -0,0 +1,17 @@
+#ifndef LPC_INPUT_TO_H_
+#define LPC_INPUT_TO_H_
+
+/* Mode values recognized by the efun input_to() */
+
+#define INPUT_NOECHO 1 /* Don't echo the next line typed */
+#define INPUT_CHARMODE 2 /* Switch into/out of charmode */
+#define INPUT_PROMPT 4 /* Use a custom prompt */
+#define INPUT_NO_TELNET 8 /* Switch into/out of charmode on the driver
+ * side only.
+ */
+#define INPUT_APPEND 16 /* Append the input_to to the list of already
+ * pending input_to's.
+ */
+#define INPUT_IGNORE_BANG 128 /* Disallow the '!' escape */
+
+#endif /* LPC_INPUT_TO_H_ */