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/* vi: set sw=4 ts=4: */
/*
* Support functions for mounting devices by label/uuid
*
* Copyright (C) 2006 by Jason Schoon <floydpink@gmail.com>
* 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 (12 kb)"
//config: default y
//config: select VOLUMEID
//config: help
//config: Prints the name of a filesystem with given label or UUID.
/* Benefits from suid root: better access to /dev/BLOCKDEVs: */
//applet:IF_FINDFS(APPLET(findfs, BB_DIR_SBIN, BB_SUID_MAYBE))
//kbuild:lib-$(CONFIG_FINDFS) += findfs.o
//usage:#define findfs_trivial_usage
//usage: "LABEL=label or UUID=uuid"
//usage:#define findfs_full_usage "\n\n"
//usage: "Find a filesystem device based on a label or UUID"
//usage:
//usage:#define findfs_example_usage
//usage: "$ 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)
bb_show_usage();
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))
bb_show_usage();
}
if (*argv != dev) {
puts(*argv);
return 0;
}
return 1;
}
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