1 files changed, 9 insertions, 0 deletions
diff --git a/util-linux/rdev.c b/util-linux/rdev.c
index 2fbb4d377..1212f841e 100644
--- a/util-linux/rdev.c
+++ b/util-linux/rdev.c
@@ -9,6 +9,15 @@
  *
  */
 
+//usage:#define rdev_trivial_usage
+//usage:       ""
+//usage:#define rdev_full_usage "\n\n"
+//usage:       "Print the device node associated with the filesystem mounted at '/'"
+//usage:
+//usage:#define rdev_example_usage
+//usage:       "$ rdev\n"
+//usage:       "/dev/mtdblock9 /\n"
+
 #include "libbb.h"
 
 int rdev_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;