1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2013 Kay Sievers
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
30 #include <sys/timex.h>
33 #include "boot-loader.h"
38 #include "conf-files.h"
40 static int get_boot_entries(struct boot_info *info) {
45 n = efi_get_boot_options(&list);
49 for (i = 0; i < n; i++) {
50 struct boot_info_entry *e;
52 e = realloc(info->fw_entries, (info->fw_entries_count+1) * sizeof(struct boot_info_entry));
59 e = &info->fw_entries[info->fw_entries_count];
60 memset(e, 0, sizeof(struct boot_info_entry));
63 err = efi_get_boot_option(list[i], &e->title, &e->part_uuid, &e->path);
68 info->fw_entries_count++;
75 static int find_active_entry(struct boot_info *info) {
82 err = efi_get_variable(EFI_VENDOR_GLOBAL, "BootCurrent", NULL, &buf, &l);
86 memcpy(&boot_cur, buf, sizeof(uint16_t));
87 for (i = 0; i < info->fw_entries_count; i++) {
88 if (info->fw_entries[i].id != boot_cur)
90 info->fw_entry_active = i;
98 static int get_boot_order(struct boot_info *info) {
102 r = efi_get_boot_order(&info->fw_entries_order);
106 info->fw_entries_order_count = r;
108 for (i = 0; i < info->fw_entries_order_count; i++) {
109 for (k = 0; k < info->fw_entries_count; k++) {
110 if (info->fw_entries[k].id != info->fw_entries_order[i])
112 info->fw_entries[k].order = i;
120 static int entry_cmp(const void *a, const void *b) {
121 const struct boot_info_entry *e1 = a;
122 const struct boot_info_entry *e2 = b;
124 /* boot order of active entries */
125 if (e1->order > 0 && e2->order > 0)
126 return e1->order - e2->order;
128 /* sort active entries before inactive ones */
134 /* order of inactive entries */
135 return e1->id - e2->id;
138 int boot_info_query(struct boot_info *info) {
141 char *loader_active = NULL;
143 efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderInfo", &info->loader);
145 get_boot_entries(info);
146 if (info->fw_entries_count > 0) {
147 get_boot_order(info);
148 qsort(info->fw_entries, info->fw_entries_count, sizeof(struct boot_info_entry), entry_cmp);
149 find_active_entry(info);
152 efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderFirmwareType", &info->fw_type);
153 efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderFirmwareInfo", &info->fw_info);
154 efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderImageIdentifier", &info->loader_image_path);
155 efi_get_loader_device_part_uuid(&info->loader_part_uuid);
157 boot_loader_read_entries(info);
158 efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderEntrySelected", &loader_active);
160 boot_loader_find_active_entry(info, loader_active);
164 snprintf(str, sizeof(str), "LoaderEntryOptions-%s", sd_id128_to_string(info->machine_id, buf));
165 efi_get_variable_string(EFI_VENDOR_LOADER, str, &info->loader_options_added);