xref: /freebsd/stand/efi/libefi/devicename.c (revision 7fdf597e96a02165cfe22ff357b857d5fa15ed8a)
1 /*-
2  * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
3  * Copyright (c) 2006 Marcel Moolenaar
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  */
27 
28 #include <stand.h>
29 #include <string.h>
30 #include <sys/disklabel.h>
31 #include <sys/param.h>
32 #include <bootstrap.h>
33 #include <disk.h>
34 
35 #include <efi.h>
36 #include <efilib.h>
37 #include <efizfs.h>
38 
39 /*
40  * Point (dev) at an allocated device specifier for the device matching the
41  * path in (devspec). If it contains an explicit device specification,
42  * use that.  If not, use the default device.
43  */
44 int
45 efi_getdev(void **vdev, const char *devspec, const char **path)
46 {
47 	struct devdesc **dev = (struct devdesc **)vdev;
48 	int rv;
49 
50 	/*
51 	 * If it looks like this is just a path and no device, then
52 	 * use the current device instead.
53 	 */
54 	if (devspec == NULL || *devspec == '/' || !strchr(devspec, ':')) {
55 		rv = devparse(dev, getenv("currdev"), NULL);
56 		if (rv == 0 && path != NULL)
57 			*path = devspec;
58 		return (rv);
59 	}
60 
61 	return (devparse(dev, devspec, path));
62 }
63