1 /*
2 * Copyright (c) 2018 Netflix, Inc.
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
29 #include <stand.h>
30 #include <efi.h>
31 #include <efichar.h>
32 #include <efilib.h>
33 #include <Guid/GlobalVariable.h>
34
35 EFI_GUID gillumosBootVarGuid = ILLUMOS_BOOT_VAR_GUID;
36 EFI_GUID gEfiGlobalVariableGuid = EFI_GLOBAL_VARIABLE;
37
38 EFI_STATUS
efi_getenv(EFI_GUID * g,const char * v,void * data,size_t * len)39 efi_getenv(EFI_GUID *g, const char *v, void *data, size_t *len)
40 {
41 size_t ul;
42 CHAR16 *uv;
43 UINT32 attr;
44 UINTN dl;
45 EFI_STATUS rv;
46
47 uv = NULL;
48 if (utf8_to_ucs2(v, &uv, &ul) != 0)
49 return (EFI_OUT_OF_RESOURCES);
50 dl = *len;
51 rv = RS->GetVariable(uv, g, &attr, &dl, data);
52 if (rv == EFI_SUCCESS || rv == EFI_BUFFER_TOO_SMALL)
53 *len = dl;
54 free(uv);
55 return (rv);
56 }
57
58 EFI_STATUS
efi_setenv(EFI_GUID * g,uint32_t attr,const char * v,void * data,size_t len)59 efi_setenv(EFI_GUID *g, uint32_t attr, const char *v, void *data, size_t len)
60 {
61 size_t ul;
62 CHAR16 *uv;
63 EFI_STATUS rv;
64
65 uv = NULL;
66 if (utf8_to_ucs2(v, &uv, &ul) != 0)
67 return (EFI_OUT_OF_RESOURCES);
68 rv = RS->SetVariable(uv, g, attr, len, data);
69 free(uv);
70 return (rv);
71 }
72
73 EFI_STATUS
efi_global_getenv(const char * v,void * data,size_t * len)74 efi_global_getenv(const char *v, void *data, size_t *len)
75 {
76
77 return (efi_getenv(&gEfiGlobalVariableGuid, v, data, len));
78 }
79
80 EFI_STATUS
efi_global_setenv(const char * v,void * data,size_t len)81 efi_global_setenv(const char *v, void *data, size_t len)
82 {
83 return (efi_setenv(&gEfiGlobalVariableGuid,
84 EFI_VARIABLE_NON_VOLATILE |
85 EFI_VARIABLE_BOOTSERVICE_ACCESS |
86 EFI_VARIABLE_RUNTIME_ACCESS, v, data, len));
87 }
88
89 EFI_STATUS
efi_illumos_getenv(const char * v,void * data,size_t * len)90 efi_illumos_getenv(const char *v, void *data, size_t *len)
91 {
92
93 return (efi_getenv(&gillumosBootVarGuid, v, data, len));
94 }
95
96 EFI_STATUS
efi_setenv_illumos_wcs(const char * var,CHAR16 * valstr)97 efi_setenv_illumos_wcs(const char *var, CHAR16 *valstr)
98 {
99 return (efi_setenv(&gillumosBootVarGuid,
100 EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
101 var, valstr, (ucs2len(valstr) + 1) * sizeof (CHAR16)));
102 }
103