source: MondoRescue/branches/3.3/mindi-busybox/util-linux/findfs.c@ 3790

/* 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.
 */

//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;
}