src/basic/efivars.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 #if !ENABLE_EFI
   5 #  include <errno.h>
   6 #endif
   7 #include <stdbool.h>
   8 #include <stddef.h>
   9 #include <stdint.h>
  10
  11 #include "sd-id128.h"
  12
  13 #include "efi/loader-features.h"
  14 #include "time-util.h"
  15
  16 #define EFI_VENDOR_LOADER  SD_ID128_MAKE(4a,67,b0,82,0a,4c,41,cf,b6,c7,44,0b,29,bb,8c,4f)
  17 #define EFI_VENDOR_GLOBAL  SD_ID128_MAKE(8b,e4,df,61,93,ca,11,d2,aa,0d,00,e0,98,03,2b,8c)
  18 #define EFI_VENDOR_SYSTEMD SD_ID128_MAKE(8c,f2,64,4b,4b,0b,42,8f,93,87,6d,87,60,50,dc,67)
  19 #define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
  20 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
  21 #define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004
  22
  23 #if ENABLE_EFI
  24
  25 char* efi_variable_path(sd_id128_t vendor, const char *name);
  26 int efi_get_variable(sd_id128_t vendor, const char *name, uint32_t *attribute, void **value, size_t *size);
  27 int efi_get_variable_string(sd_id128_t vendor, const char *name, char **p);
  28 int efi_set_variable(sd_id128_t vendor, const char *name, const void *value, size_t size);
  29 int efi_set_variable_string(sd_id128_t vendor, const char *name, const char *p);
  30
  31 int efi_systemd_options_variable(char **line);
  32
  33 #else
  34
  35 static inline char* efi_variable_path(sd_id128_t vendor, const char *name) {
  36         return NULL;
  37 }
  38
  39 static inline int efi_get_variable(sd_id128_t vendor, const char *name, uint32_t *attribute, void **value, size_t *size) {
  40         return -EOPNOTSUPP;
  41 }
  42
  43 static inline int efi_get_variable_string(sd_id128_t vendor, const char *name, char **p) {
  44         return -EOPNOTSUPP;
  45 }
  46
  47 static inline int efi_set_variable(sd_id128_t vendor, const char *name, const void *value, size_t size) {
  48         return -EOPNOTSUPP;
  49 }
  50
  51 static inline int efi_set_variable_string(sd_id128_t vendor, const char *name, const char *p) {
  52         return -EOPNOTSUPP;
  53 }
  54
  55 static inline int efi_systemd_options_variable(char **line) {
  56         return -ENODATA;
  57 }
  58
  59 #endif