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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2013 Kay Sievers
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>
#include <getopt.h>
#include <locale.h>
#include <string.h>
#include <fnmatch.h>
#include <fcntl.h>
#include <sys/timex.h>
#include "boot.h"
#include "boot-loader.h"
#include "build.h"
#include "util.h"
#include "strv.h"
#include "efivars.h"
#include "conf-files.h"
static char *tilt_slashes(char *s) {
char *p;
if (!s)
return NULL;
for (p = s; *p; p++)
if (*p == '\\')
*p = '/';
return s;
}
static int get_boot_entries(struct boot_info *info) {
uint16_t *list;
int i, n;
int err = 0;
n = efi_get_boot_options(&list);
if (n < 0)
return n;
for (i = 0; i < n; i++) {
struct boot_info_entry *e;
e = realloc(info->fw_entries, (info->fw_entries_count+1) * sizeof(struct boot_info_entry));
if (!e) {
err = -ENOMEM;
break;
}
info->fw_entries = e;
e = &info->fw_entries[info->fw_entries_count];
memset(e, 0, sizeof(struct boot_info_entry));
e->order = -1;
err = efi_get_boot_option(list[i], &e->title, &e->part_uuid, &e->path);
if (err < 0)
continue;
if (isempty(e->title)) {
free(e->title);
e->title = NULL;
}
tilt_slashes(e->path);
e->id = list[i];
info->fw_entries_count++;
}
free(list);
return err;
}
static int find_active_entry(struct boot_info *info) {
uint16_t boot_cur;
void *buf;
size_t l;
size_t i;
int err = -ENOENT;
err = efi_get_variable(EFI_VENDOR_GLOBAL, "BootCurrent", NULL, &buf, &l);
if (err < 0)
return err;
memcpy(&boot_cur, buf, sizeof(uint16_t));
for (i = 0; i < info->fw_entries_count; i++) {
if (info->fw_entries[i].id != boot_cur)
continue;
info->fw_entry_active = i;
err = 0;
break;
}
free(buf);
return err;
}
static int get_boot_order(struct boot_info *info) {
size_t i, k;
int r;
r = efi_get_boot_order(&info->fw_entries_order);
if (r < 0)
return r;
info->fw_entries_order_count = r;
for (i = 0; i < info->fw_entries_order_count; i++) {
for (k = 0; k < info->fw_entries_count; k++) {
if (info->fw_entries[k].id != info->fw_entries_order[i])
continue;
info->fw_entries[k].order = i;
break;
}
}
return 0;
}
static int entry_cmp(const void *a, const void *b) {
const struct boot_info_entry *e1 = a;
const struct boot_info_entry *e2 = b;
/* boot order of active entries */
if (e1->order > 0 && e2->order > 0)
return e1->order - e2->order;
/* sort active entries before inactive ones */
if (e1->order > 0)
return 1;
if (e2->order > 0)
return -1;
/* order of inactive entries */
return e1->id - e2->id;
}
int boot_info_query(struct boot_info *info) {
char str[64];
char buf[64];
char *loader_active = NULL;
efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderInfo", &info->loader);
get_boot_entries(info);
if (info->fw_entries_count > 0) {
get_boot_order(info);
qsort(info->fw_entries, info->fw_entries_count, sizeof(struct boot_info_entry), entry_cmp);
find_active_entry(info);
}
efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderFirmwareType", &info->fw_type);
efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderFirmwareInfo", &info->fw_info);
efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderImageIdentifier", &info->loader_image_path);
tilt_slashes(info->loader_image_path);
efi_get_loader_device_part_uuid(&info->loader_part_uuid);
boot_loader_read_entries(info);
efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderEntrySelected", &loader_active);
if (loader_active) {
boot_loader_find_active_entry(info, loader_active);
free(loader_active);
}
snprintf(str, sizeof(str), "LoaderEntryOptions-%s", sd_id128_to_string(info->machine_id, buf));
efi_get_variable_string(EFI_VENDOR_LOADER, str, &info->loader_options_added);
return 0;
}
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