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 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 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 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 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 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 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