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 d = opendir("/sys/firmware/efi/efivars");
49 for (dent = readdir(d); dent != NULL; dent = readdir(d)) {
51 struct boot_info_entry *e;
53 if (dent->d_name[0] == '.')
55 if (sscanf(dent->d_name, "Boot%04X-8be4df61-93ca-11d2-aa0d-00e098032b8c", &id) != 1)
58 e = realloc(info->fw_entries, (info->fw_entries_count+1) * sizeof(struct boot_info_entry));
65 e = &info->fw_entries[info->fw_entries_count];
66 memset(e, 0, sizeof(struct boot_info_entry));
69 err = efi_get_boot_option(id, &e->title, &e->part_uuid, &e->path);
74 info->fw_entries_count++;
81 static int find_active_entry(struct boot_info *info) {
88 err = efi_get_variable(EFI_VENDOR_GLOBAL, "BootCurrent", NULL, &buf, &l);
92 memcpy(&boot_cur, buf, sizeof(uint16_t));
93 for (i = 0; i < info->fw_entries_count; i++) {
94 if (info->fw_entries[i].id != boot_cur)
96 info->fw_entry_active = i;
104 static int get_boot_order(struct boot_info *info) {
108 r = efi_get_boot_order(&info->fw_entries_order);
112 info->fw_entries_order_count = r;
114 for (i = 0; i < info->fw_entries_order_count; i++) {
115 for (k = 0; k < info->fw_entries_count; k++) {
116 if (info->fw_entries[k].id != info->fw_entries_order[i])
118 info->fw_entries[k].order = i;
126 static int entry_cmp(const void *a, const void *b) {
127 const struct boot_info_entry *e1 = a;
128 const struct boot_info_entry *e2 = b;
130 /* boot order of active entries */
131 if (e1->order > 0 && e2->order > 0)
132 return e1->order - e2->order;
134 /* sort active entries before inactive ones */
140 /* order of inactive entries */
141 return e1->id - e2->id;
144 int boot_info_query(struct boot_info *info) {
147 char *loader_active = NULL;
149 efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderInfo", &info->loader);
151 get_boot_entries(info);
152 if (info->fw_entries_count > 0) {
153 get_boot_order(info);
154 qsort(info->fw_entries, info->fw_entries_count, sizeof(struct boot_info_entry), entry_cmp);
155 find_active_entry(info);
158 efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderFirmwareType", &info->fw_type);
159 efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderFirmwareInfo", &info->fw_info);
160 efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderImageIdentifier", &info->loader_image_path);
161 efi_get_loader_device_part_uuid(&info->loader_part_uuid);
163 boot_loader_read_entries(info);
164 efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderEntrySelected", &loader_active);
166 boot_loader_find_active_entry(info, loader_active);
170 snprintf(str, sizeof(str), "LoaderEntryOptions-%s", sd_id128_to_string(info->machine_id, buf));
171 efi_get_variable_string(EFI_VENDOR_LOADER, str, &info->loader_options_added);