1/*-
2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <stand.h>
28#include <string.h>
29
30#include "bootstrap.h"
31#include "disk.h"
32#include "libuserboot.h"
33
34/*
35 * Point (dev) at an allocated device specifier for the device matching the
36 * path in (devspec). If it contains an explicit device specification,
37 * use that.  If not, use the default device.
38 */
39int
40userboot_getdev(void **vdev, const char *devspec, const char **path)
41{
42	struct devdesc **dev = (struct devdesc **)vdev;
43	int rv;
44
45	/*
46	 * If it looks like this is just a path and no
47	 * device, go with the current device.
48	 */
49	if ((devspec == NULL) ||
50	    (devspec[0] == '/') ||
51	    (strchr(devspec, ':') == NULL)) {
52
53		rv = devparse(dev, getenv("currdev"), NULL);
54		if (rv == 0 && path != NULL)
55			*path = devspec;
56		return (rv);
57	}
58
59	/*
60	 * Try to parse the device name off the beginning of the devspec
61	 */
62	return (devparse(dev, devspec, path));
63}
64