Fix some compiler warnings emitted by gcc-4.8.0

[oweals/busybox.git] / util-linux / rdev.c

diff --git a/util-linux/rdev.c b/util-linux/rdev.c
index 33abd39dc7c19b8864c28e9b9ffe9d492b43f887..465281756e3e12d44c43dd7279f81929c49f9005 100644 (file)
--- a/util-linux/rdev.c
+++ b/util-linux/rdev.c
@@ -5,18 +5,27 @@
  * Copyright (c) 2008 Nuovation System Designs, LLC
  *   Grant Erickson <gerickson@nuovations.com>
  *
- * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
  *
  */
 
+//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;
 int rdev_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
 {
-       char const * const root_device = find_block_device("/");
+       const char *root_device = find_block_device("/");
 
-       if (root_device != NULL) {
+       if (root_device) {
                printf("%s /\n", root_device);
                return EXIT_SUCCESS;
        }