blob: daa46b039fa815d860d64fd49e2f8c6b7bc18f78 [file] [log] [blame]
/* vi: set sw=4 ts=4: */
* Support functions for mounting devices by label/uuid
* Copyright (C) 2006 by Jason Schoon <>
* Some portions cribbed from e2fsprogs, util-linux, dosfstools
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
//config:config FINDFS
//config: bool "findfs"
//config: default y
//config: select PLATFORM_LINUX
//config: select VOLUMEID
//config: help
//config: Prints the name of a filesystem with given label or UUID.
//config: WARNING:
//config: With all submodules selected, it will add ~8k to busybox.
/* Benefits from suid root: better access to /dev/BLOCKDEVs: */
//kbuild:lib-$(CONFIG_FINDFS) += findfs.o
//usage:#define findfs_trivial_usage
//usage: "LABEL=label or UUID=uuid"
//usage:#define findfs_full_usage "\n\n"
//usage: "Find a filesystem device based on a label or UUID"
//usage:#define findfs_example_usage
//usage: "$ findfs LABEL=MyDevice"
#include "libbb.h"
#include "volume_id.h"
int findfs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int findfs_main(int argc UNUSED_PARAM, char **argv)
char *dev = *++argv;
if (!dev)
if (is_prefixed_with(dev, "/dev/")) {
/* Just pass any /dev/xxx name right through.
* This might aid in some scripts being able
* to call this unconditionally */
dev = NULL;
} else {
/* Otherwise, handle LABEL=xxx and UUID=xxx,
* fail on anything else */
if (!resolve_mount_spec(argv))
if (*argv != dev) {
return 0;
return 1;