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42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* rdev - print device node associated with a filesystem
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*
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* Copyright (c) 2008 Nuovation System Designs, LLC
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* Grant Erickson <gerickson@nuovations.com>
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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//config:config RDEV
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//config: bool "rdev (2.1 kb)"
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//config: default y
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//config: help
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//config: Print the device node associated with the filesystem mounted at '/'.
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//applet:IF_RDEV(APPLET_NOEXEC(rdev, rdev, BB_DIR_USR_SBIN, BB_SUID_DROP, rdev))
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//kbuild:lib-$(CONFIG_RDEV) += rdev.o
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//usage:#define rdev_trivial_usage
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//usage: ""
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//usage:#define rdev_full_usage "\n\n"
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//usage: "Print the device node associated with the filesystem mounted at '/'"
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//usage:
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//usage:#define rdev_example_usage
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//usage: "$ rdev\n"
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//usage: "/dev/mtdblock9 /\n"
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#include "libbb.h"
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int rdev_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int rdev_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
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{
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const char *root_device = find_block_device("/");
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if (root_device) {
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printf("%s /\n", root_device);
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return EXIT_SUCCESS;
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}
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return EXIT_FAILURE;
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}
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