busybox/util-linux/findfs.c

/* 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 tarball for details.
 */

#include "libbb.h"
#include "volume_id.h"

int findfs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int findfs_main(int argc, char **argv)
{
	char *tmp = NULL;

	if (argc != 2)
		bb_show_usage();

	if (!strncmp(argv[1], "LABEL=", 6))
		tmp = get_devname_from_label(argv[1] + 6);
	else if (!strncmp(argv[1], "UUID=", 5))
		tmp = get_devname_from_uuid(argv[1] + 5);
	else if (!strncmp(argv[1], "/dev/", 5)) {
		/* Just pass a device name right through.  This might aid in some scripts
		being able to call this unconditionally */
		tmp = argv[1];
	} else
		bb_show_usage();

	if (tmp) {
		puts(tmp);
		return 0;
	}
	return 1;
}