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authorKay Sievers <kay@vrfy.org>2013-02-08 17:24:43 +0100
committerKay Sievers <kay@vrfy.org>2013-02-11 19:35:52 +0100
commit7b4d7cc08283e5485dcfa49ffdf1915de1d5e81b (patch)
treefc73d48c2f124bf27a3c47979a3e28f825eb8902 /src/boot/boot-efi.c
parentc937e0d5c579863677e0fcb5508517f7714c332d (diff)
bootctl: add boot loader and firmware interface tool
Diffstat (limited to 'src/boot/boot-efi.c')
-rw-r--r--src/boot/boot-efi.c171
1 files changed, 171 insertions, 0 deletions
diff --git a/src/boot/boot-efi.c b/src/boot/boot-efi.c
new file mode 100644
index 0000000000..32cb973cf6
--- /dev/null
+++ b/src/boot/boot-efi.c
@@ -0,0 +1,171 @@
+/*-*- 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 int get_boot_entries(struct boot_info *info) {
+ DIR *d = NULL;
+ struct dirent *dent;
+ int err = 0;
+
+ d = opendir("/sys/firmware/efi/efivars");
+ if (!d)
+ return -errno;
+
+ for (dent = readdir(d); dent != NULL; dent = readdir(d)) {
+ unsigned int id;
+ struct boot_info_entry *e;
+
+ if (dent->d_name[0] == '.')
+ continue;
+ if (sscanf(dent->d_name, "Boot%04X-8be4df61-93ca-11d2-aa0d-00e098032b8c", &id) != 1)
+ continue;
+
+ 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(id, NULL, &e->title, &e->part_uuid, &e->path, &e->data, &e->data_size);
+ if (err < 0)
+ break;
+ e->id = id;
+
+ info->fw_entries_count++;
+ }
+ closedir(d);
+
+ 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 err;
+
+ err = efi_get_boot_order(&info->fw_entries_order, &info->fw_entries_order_count);
+ if (err < 0)
+ return err;
+
+ 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;
+
+ info->loader = efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderInfo");
+
+ 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);
+ }
+
+ info->fw_type = efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderFirmwareType");
+ info->fw_info = efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderFirmwareInfo");
+ info->loader_image_path = efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderImageIdentifier");
+ efi_get_loader_device_part_uuid(&info->loader_part_uuid);
+
+ boot_loader_read_entries(info);
+ loader_active = efi_get_variable_string(EFI_VENDOR_LOADER, "LoaderEntrySelected");
+ 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));
+ info->loader_options_added = efi_get_variable_string(EFI_VENDOR_LOADER, str);
+ return 0;
+}