-int runlevel_main(int argc, char **argv);
-int runlevel_main(int argc, char **argv)
+//kbuild:lib-$(CONFIG_RUNLEVEL) += runlevel.o
+
+//usage:#define runlevel_trivial_usage
+//usage: "[FILE]"
+//usage:#define runlevel_full_usage "\n\n"
+//usage: "Find the current and previous system runlevel\n"
+//usage: "\n"
+//usage: "If no utmp FILE exists or if no runlevel record can be found,\n"
+//usage: "print \"unknown\""
+//usage:
+//usage:#define runlevel_example_usage
+//usage: "$ runlevel /var/run/utmp\n"
+//usage: "N 2"
+
+#include "libbb.h"
+
+int runlevel_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int runlevel_main(int argc UNUSED_PARAM, char **argv)