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