1/*-
2 * Copyright (c) 2010 Marcel Moolenaar
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 <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <libefi.h>
31#include <stdlib.h>
32
33#include "libefi_int.h"
34
35/*
36 * EFI_STATUS
37 * GetVariable(
38 *	IN CHAR16	*VariableName,
39 *	IN EFI_GUID	*VendorGuid,
40 *	OUT UINT32	*Attributes OPTIONAL,
41 *	IN OUT UINTN	*DataSize,
42 *	OUT VOID	*Data
43 *   );
44 */
45
46int
47efi_getvar(char *name, uuid_t *vendor, uint32_t *attrib, size_t *datasize,
48    void *data)
49{
50	struct iodev_efivar_req req;
51	int error;
52
53	req.namesize = 0;
54	error = libefi_utf8_to_ucs2(name, &req.namesize, &req.name);
55	if (error)
56		return (error);
57
58	req.vendor = *vendor;
59	req.datasize = *datasize;
60	req.data = data;
61	req.access = IODEV_EFIVAR_GETVAR;
62	error = libefi_efivar(&req);
63	*datasize = req.datasize;
64	if (!error && attrib != NULL)
65		*attrib = req.attrib;
66	free(req.name);
67	return (error);
68}
69