LXR busybox/util-linux/rdev.c

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * rdev - print device node associated with a filesystem
   4 *
   5 * Copyright (c) 2008 Nuovation System Designs, LLC
   6 *   Grant Erickson <gerickson@nuovations.com>
   7 *
   8 * Licensed under GPLv2, see file LICENSE in this source tree.
   9 *
  10 */
  11
  12//usage:#define rdev_trivial_usage
  13//usage:       ""
  14//usage:#define rdev_full_usage "\n\n"
  15//usage:       "Print the device node associated with the filesystem mounted at '/'"
  16//usage:
  17//usage:#define rdev_example_usage
  18//usage:       "$ rdev\n"
  19//usage:       "/dev/mtdblock9 /\n"
  20
  21#include "libbb.h"
  22
  23int rdev_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  24int rdev_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
  25{
  26        const char *root_device = find_block_device("/");
  27
  28        if (root_device) {
  29                printf("%s /\n", root_device);
  30                return EXIT_SUCCESS;
  31        }
  32        return EXIT_FAILURE;
  33}
  34