[systemd-commits] .gitignore Makefile.am src/boot src/shared
Kay Sievers
kay at kemper.freedesktop.org
Mon Feb 11 10:36:19 PST 2013
.gitignore | 1
Makefile.am | 16 ++
src/boot/boot-efi.c | 171 ++++++++++++++++++++++++++++++
src/boot/boot-loader.c | 131 +++++++++++++++++++++++
src/boot/boot-loader.h | 25 ++++
src/boot/boot.h | 64 +++++++++++
src/boot/bootctl.c | 271 +++++++++++++++++++++++++++++++++++++++++++++++++
src/shared/efivars.c | 185 +++++++++++++++++++++++++++++++++
src/shared/efivars.h | 7 +
src/shared/utf8.c | 2
10 files changed, 869 insertions(+), 4 deletions(-)
New commits:
commit 7b4d7cc08283e5485dcfa49ffdf1915de1d5e81b
Author: Kay Sievers <kay at vrfy.org>
Date: Fri Feb 8 17:24:43 2013 +0100
bootctl: add boot loader and firmware interface tool
diff --git a/.gitignore b/.gitignore
index 350aaf7..d27cce7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
/TAGS
/accelerometer
/ata_id
+/bootctl
/build-aux
/cdrom_id
/collect
diff --git a/Makefile.am b/Makefile.am
index 9da3394..2cec04a 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -3069,7 +3069,6 @@ timedatectl_LDADD = \
bin_PROGRAMS += \
timedatectl
-
endif
polkitpolicy_in_files += \
@@ -3079,6 +3078,21 @@ EXTRA_DIST += \
units/systemd-timedated.service.in
# ------------------------------------------------------------------------------
+bootctl_SOURCES = \
+ src/boot/boot.h \
+ src/boot/boot-loader.h \
+ src/boot/bootctl.c \
+ src/boot/boot-loader.c \
+ src/boot/boot-efi.c
+
+bootctl_LDADD = \
+ libsystemd-shared.la \
+ libsystemd-id128.la
+
+bin_PROGRAMS += \
+ bootctl
+
+# ------------------------------------------------------------------------------
if HAVE_MYHOSTNAME
libnss_myhostname_la_SOURCES = \
src/nss-myhostname/nss-myhostname.c \
diff --git a/src/boot/boot-efi.c b/src/boot/boot-efi.c
new file mode 100644
index 0000000..32cb973
--- /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;
+}
diff --git a/src/boot/boot-loader.c b/src/boot/boot-loader.c
new file mode 100644
index 0000000..bd563da
--- /dev/null
+++ b/src/boot/boot-loader.c
@@ -0,0 +1,131 @@
+/*-*- 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 <ctype.h>
+#include <sys/timex.h>
+
+#include "boot.h"
+#include "boot-loader.h"
+#include "build.h"
+#include "util.h"
+#include "strv.h"
+#include "conf-files.h"
+
+static char *loader_fragment_read_title(const char *fragment) {
+ FILE *f;
+ char line[LINE_MAX];
+ char *title = NULL;
+
+ f = fopen(fragment, "re");
+ if (!f)
+ return NULL;
+
+ while (fgets(line, sizeof(line), f) != NULL) {
+ char *s;
+ size_t l;
+
+ l = strlen(line);
+ if (l < 1)
+ continue;
+ if (line[l-1] == '\n')
+ line[l-1] = '\0';
+
+ s = line;
+ while (isspace(s[0]))
+ s++;
+
+ if (s[0] == '#')
+ continue;
+
+ if (!startswith(s, "title"))
+ continue;
+
+ s += strlen("title");
+ if (!isspace(s[0]))
+ continue;
+ while (isspace(s[0]))
+ s++;
+
+ title = strdup(s);
+ break;
+ }
+
+ fclose(f);
+ return title;
+}
+
+int boot_loader_read_entries(struct boot_info *info) {
+ _cleanup_strv_free_ char **files = NULL;
+ static const char *loader_dir[] = { "/boot/loader/entries", NULL};
+ unsigned int count;
+ unsigned int i;
+ int err;
+
+ err = conf_files_list_strv(&files, ".conf", NULL, loader_dir);
+ if (err < 0)
+ return err;
+
+ count = strv_length(files);
+ info->loader_entries = new0(struct boot_info_entry, count);
+ if (!info->loader_entries)
+ return -ENOMEM;
+
+ for (i = 0; i < count; i++) {
+ info->loader_entries[i].title = loader_fragment_read_title(files[i]);
+ info->loader_entries[i].path = strdup(files[i]);
+ if (!info->loader_entries[i].title || !info->loader_entries[i].path) {
+ free(info->loader_entries[i].title);
+ free(info->loader_entries[i].path);
+ return -ENOMEM;
+ }
+ info->loader_entries_count++;
+ }
+ return 0;
+}
+
+int boot_loader_find_active_entry(struct boot_info *info, const char *loader_active) {
+ char *fn;
+ unsigned int i;
+
+ if (!loader_active)
+ return -ENOENT;
+ if (info->loader_entries_count == 0)
+ return -ENOENT;
+
+ if (asprintf(&fn, "/boot/loader/entries/%s.conf", loader_active) < 0)
+ return -ENOMEM;
+
+ for (i = 0; i < info->loader_entries_count; i++) {
+ if (strcmp(fn, info->loader_entries[i].path) == 0) {
+ info->loader_entry_active = i;
+ break;
+ }
+ }
+
+ free(fn);
+ return 0;
+}
diff --git a/src/boot/boot-loader.h b/src/boot/boot-loader.h
new file mode 100644
index 0000000..08827c3
--- /dev/null
+++ b/src/boot/boot-loader.h
@@ -0,0 +1,25 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+ 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/>.
+***/
+
+int boot_loader_read_entries(struct boot_info *info);
+int boot_loader_find_active_entry(struct boot_info *info, const char *loader_active);
diff --git a/src/boot/boot.h b/src/boot/boot.h
new file mode 100644
index 0000000..90e45cc
--- /dev/null
+++ b/src/boot/boot.h
@@ -0,0 +1,64 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+ 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 "sd-id128.h"
+
+/*
+ * Firmware and boot manager information to be filled in
+ * by the platform.
+ *
+ * This is partly EFI specific, if you add things, keep this
+ * as generic as possible to be able to re-use it on other
+ * platforms.
+ */
+
+struct boot_info_entry {
+ uint16_t id;
+ uint16_t order;
+ char *title;
+ sd_id128_t part_uuid;
+ char *path;
+ char *data;
+ size_t data_size;
+};
+
+struct boot_info {
+ sd_id128_t machine_id;
+ sd_id128_t boot_id;
+ char *fw_type;
+ char *fw_info;
+ struct boot_info_entry *fw_entries;
+ size_t fw_entries_count;
+ uint16_t *fw_entries_order;
+ size_t fw_entries_order_count;
+ ssize_t fw_entry_active;
+ char *loader;
+ char *loader_image_path;
+ sd_id128_t loader_part_uuid;
+ struct boot_info_entry *loader_entries;
+ size_t loader_entries_count;
+ ssize_t loader_entry_active;
+ char *loader_options_added;
+};
+
+int boot_info_query(struct boot_info *info);
diff --git a/src/boot/bootctl.c b/src/boot/bootctl.c
new file mode 100644
index 0000000..641546b
--- /dev/null
+++ b/src/boot/bootctl.c
@@ -0,0 +1,271 @@
+/*-*- 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 <sys/timex.h>
+
+#include "boot.h"
+#include "build.h"
+#include "util.h"
+#include "utf8.h"
+
+static int help(void) {
+ printf("%s [OPTIONS...] COMMAND ...\n\n"
+ "Query or change firmware and boot mananger settings.\n\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ "Commands:\n"
+ " status Show current time settings\n",
+ program_invocation_short_name);
+
+ return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+ enum {
+ ARG_VERSION = 0x100,
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { NULL, 0, NULL, 0 }
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+ while ((c = getopt_long(argc, argv, "+hH:P", options, NULL)) >= 0) {
+
+ switch (c) {
+
+ case 'h':
+ help();
+ return 0;
+
+ case ARG_VERSION:
+ puts(PACKAGE_STRING);
+ puts(SYSTEMD_FEATURES);
+ return 0;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ log_error("Unknown option code %c", c);
+ return -EINVAL;
+ }
+ }
+
+ return 1;
+}
+
+static int boot_info_new(struct boot_info **info) {
+ struct boot_info *in;
+ int err;
+
+ in = new0(struct boot_info, 1);
+ if (!in)
+ return -ENOMEM;
+
+ err = sd_id128_get_machine(&in->machine_id);
+ if (err < 0)
+ goto err;
+
+ err = sd_id128_get_boot(&in->boot_id);
+ if (err < 0)
+ goto err;
+
+ in->fw_entry_active = -1;
+ in->loader_entry_active = -1;
+
+ *info = in;
+ return 0;
+err:
+ free(in);
+ return err;
+}
+
+static void boot_info_entries_free(struct boot_info_entry *entries, size_t n) {
+ size_t i;
+
+ for (i = 0; i < n; i++) {
+ free(entries[i].title);
+ free(entries[i].path);
+ }
+ free(entries);
+}
+
+static void boot_info_free(struct boot_info *info) {
+ free(info->fw_type);
+ free(info->fw_info);
+ boot_info_entries_free(info->fw_entries, info->fw_entries_count);
+ free(info->fw_entries_order);
+ free(info->loader);
+ free(info->loader_image_path);
+ free(info->loader_options_added);
+ boot_info_entries_free(info->loader_entries, info->loader_entries_count);
+ free(info);
+}
+
+static int show_status(char **args, unsigned n) {
+ char buf[64];
+ struct boot_info *info;
+ int err;
+
+ err = boot_info_new(&info);
+ if (err < 0)
+ return -ENOMEM;
+
+ err = boot_info_query(info);
+
+ printf(" Machine ID: %s\n", sd_id128_to_string(info->machine_id, buf));
+ printf(" Boot ID: %s\n", sd_id128_to_string(info->boot_id, buf));
+ if (info->fw_type)
+ printf(" Firmware: %s (%s)\n", info->fw_type, strna(info->fw_info));
+
+ if (info->fw_entry_active >= 0) {
+ printf("Firmware entry: %s\n", info->fw_entries[info->fw_entry_active].title);
+ if (info->fw_entries[info->fw_entry_active].path)
+ printf(" %s\n", info->fw_entries[info->fw_entry_active].path);
+ if (!sd_id128_equal(info->fw_entries[info->fw_entry_active].part_uuid, SD_ID128_NULL))
+ printf(" %s\n", sd_id128_to_string(info->fw_entries[info->fw_entry_active].part_uuid, buf));
+ }
+
+ if (info->loader) {
+ printf(" Loader: %s\n", info->loader);
+ printf(" %s\n", strna(info->loader_image_path));
+ if (!sd_id128_equal(info->loader_part_uuid, SD_ID128_NULL))
+ printf(" %s\n", sd_id128_to_string(info->loader_part_uuid, buf));
+
+ if (info->loader_entry_active >= 0) {
+ printf(" Loader entry: %s\n", info->loader_entries[info->loader_entry_active].title);
+ printf(" %s\n", info->loader_entries[info->loader_entry_active].path);
+ }
+
+ printf("Loader options: %s\n", strna(info->loader_options_added));
+ } else
+ printf("No suitable data is provided by the boot manager. See:\n"
+ " http://www.freedesktop.org/wiki/Software/systemd/BootLoaderInterface\n"
+ " http://www.freedesktop.org/wiki/Specifications/BootLoaderSpec\n"
+ "for details.\n");
+ printf("\n");
+
+ boot_info_free(info);
+ return err;
+}
+
+static int bootctl_main(int argc, char *argv[]) {
+ static const struct {
+ const char* verb;
+ const enum {
+ MORE,
+ LESS,
+ EQUAL
+ } argc_cmp;
+ const int argc;
+ int (* const dispatch)(char **args, unsigned n);
+ } verbs[] = {
+ { "status", LESS, 1, show_status },
+ };
+
+ int left;
+ unsigned i;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ left = argc - optind;
+
+ if (left <= 0)
+ /* Special rule: no arguments means "status" */
+ i = 0;
+ else {
+ if (streq(argv[optind], "help")) {
+ help();
+ return 0;
+ }
+
+ for (i = 0; i < ELEMENTSOF(verbs); i++)
+ if (streq(argv[optind], verbs[i].verb))
+ break;
+
+ if (i >= ELEMENTSOF(verbs)) {
+ log_error("Unknown operation %s", argv[optind]);
+ return -EINVAL;
+ }
+ }
+
+ switch (verbs[i].argc_cmp) {
+
+ case EQUAL:
+ if (left != verbs[i].argc) {
+ log_error("Invalid number of arguments.");
+ return -EINVAL;
+ }
+ break;
+
+ case MORE:
+ if (left < verbs[i].argc) {
+ log_error("Too few arguments.");
+ return -EINVAL;
+ }
+ break;
+
+ case LESS:
+ if (left > verbs[i].argc) {
+ log_error("Too many arguments.");
+ return -EINVAL;
+ }
+ break;
+
+ default:
+ assert_not_reached("Unknown comparison operator.");
+ }
+
+ return verbs[i].dispatch(argv + optind, left);
+}
+
+int main(int argc, char *argv[]) {
+ int r, retval = EXIT_FAILURE;
+
+ log_parse_environment();
+ log_open();
+
+ r = parse_argv(argc, argv);
+ if (r < 0)
+ goto finish;
+ else if (r == 0) {
+ retval = EXIT_SUCCESS;
+ goto finish;
+ }
+
+ r = bootctl_main(argc, argv);
+ retval = r < 0 ? EXIT_FAILURE : r;
+finish:
+ return retval;
+}
diff --git a/src/shared/efivars.c b/src/shared/efivars.c
index 09af44a..e16c610 100644
--- a/src/shared/efivars.c
+++ b/src/shared/efivars.c
@@ -20,14 +20,13 @@
***/
#include <unistd.h>
+#include <string.h>
#include <fcntl.h>
#include "util.h"
#include "utf8.h"
#include "efivars.h"
-#define EFI_VENDOR_LOADER SD_ID128_MAKE(4a,67,b0,82,0a,4c,41,cf,b6,c7,44,0b,29,bb,8c,4f)
-
bool is_efiboot(void) {
return access("/sys/firmware/efi", F_OK) >= 0;
}
@@ -93,6 +92,188 @@ int efi_get_variable(sd_id128_t vendor, const char *name, uint32_t *attribute, v
return 0;
}
+char *efi_get_variable_string(sd_id128_t vendor, const char *name) {
+ _cleanup_free_ void *s = NULL;
+ size_t ss;
+ int err;
+
+ err = efi_get_variable(vendor, name, NULL, &s, &ss);
+ if (err < 0)
+ return NULL;
+ return utf16_to_utf8(s, ss);
+}
+
+static size_t utf16_size(const uint16_t *s) {
+ size_t l = 0;
+
+ while (s[l] > 0)
+ l++;
+ return (l+1) * sizeof(uint16_t);
+}
+
+static void efi_guid_to_id128(const void *guid, sd_id128_t *id128) {
+ struct uuid {
+ uint32_t u1;
+ uint16_t u2;
+ uint16_t u3;
+ uint8_t u4[8];
+ } _packed_;
+ const struct uuid *uuid = guid;
+
+ id128->bytes[0] = (uuid->u1 >> 24) & 0xff;
+ id128->bytes[1] = (uuid->u1 >> 16) & 0xff;
+ id128->bytes[2] = (uuid->u1 >> 8) & 0xff;
+ id128->bytes[3] = (uuid->u1) & 0xff;
+ id128->bytes[4] = (uuid->u2 >> 8) & 0xff;
+ id128->bytes[5] = (uuid->u2) & 0xff;
+ id128->bytes[6] = (uuid->u3 >> 8) & 0xff;
+ id128->bytes[7] = (uuid->u3) & 0xff;
+ memcpy(&id128->bytes[8], uuid->u4, sizeof(uuid->u4));
+}
+
+int efi_get_boot_option(uint32_t id, uint32_t *attributes, char **title, sd_id128_t *part_uuid, char **path, char **data, size_t *data_size) {
+ struct boot_option {
+ uint32_t attr;
+ uint16_t path_len;
+ uint16_t title[];
+ } _packed_;
+
+ struct drive_path {
+ uint32_t part_nr;
+ uint64_t part_start;
+ uint64_t part_size;
+ char signature[16];
+ uint8_t mbr_type;
+ uint8_t signature_type;
+ } _packed_;
+
+ struct device_path {
+ uint8_t type;
+ uint8_t sub_type;
+ uint16_t length;
+ union {
+ uint16_t path[0];
+ struct drive_path drive;
+ };
+ } _packed_;
+
+ char boot_id[32];
+ _cleanup_free_ char *buf = NULL;
+ size_t l;
+ struct boot_option *header;
+ size_t title_size;
+ char *s = NULL;
+ char *p = NULL;
+ sd_id128_t p_uuid = SD_ID128_NULL;
+ char *d = NULL;
+ size_t d_size = 0;
+ int err;
+
+ snprintf(boot_id, sizeof(boot_id), "Boot%04X", id);
+ err = efi_get_variable(EFI_VENDOR_GLOBAL, boot_id, NULL, (void **)&buf, &l);
+ if (err < 0)
+ return err;
+
+ if (l < sizeof(struct boot_option))
+ return -ENOENT;
+
+ header = (struct boot_option *)buf;
+ title_size = utf16_size(header->title);
+ if (title_size > l - offsetof(struct boot_option, title))
+ return -EINVAL;
+
+ s = utf16_to_utf8(header->title, title_size);
+ if (!s) {
+ err = -ENOMEM;
+ goto err;
+ }
+
+ if (header->path_len > 0) {
+ char *dbuf;
+ size_t dnext;
+
+ dbuf = buf + offsetof(struct boot_option, title) + title_size;
+ dnext = 0;
+ while (dnext < header->path_len) {
+ struct device_path *dpath;
+
+ dpath = (struct device_path *)(dbuf + dnext);
+ if (dpath->length < 4)
+ break;
+
+ /* Type 0x7F – End of Hardware Device Path, Sub-Type 0xFF – End Entire Device Path */
+ if (dpath->type == 0x7f && dpath->sub_type == 0xff)
+ break;
+
+ dnext += dpath->length;
+
+ /* Type 0x04 – Media Device Path */
+ if (dpath->type != 0x04)
+ continue;
+
+ /* Sub-Type 1 – Hard Drive */
+ if (dpath->sub_type == 0x01) {
+ /* 0x02 – GUID Partition Table */
+ if (dpath->drive.mbr_type != 0x02)
+ continue;
+
+ /* 0x02 – GUID signature */
+ if (dpath->drive.signature_type != 0x02)
+ continue;
+
+ efi_guid_to_id128(dpath->drive.signature, &p_uuid);
+ continue;
+ }
+
+ /* Sub-Type 4 – File Path */
+ if (dpath->sub_type == 0x04) {
+ p = utf16_to_utf8(dpath->path, dpath->length-4);
+ continue;
+ }
+ }
+ }
+
+ *title = s;
+ if (part_uuid)
+ *part_uuid = p_uuid;
+ if (path)
+ *path = p;
+ if (data)
+ *data = d;
+ if (data_size)
+ *data_size = d_size;
+ return 0;
+err:
+ free(s);
+ free(p);
+ free(d);
+ return err;
+}
+
+int efi_get_boot_order(uint16_t **order, size_t *count) {
+ void *buf;
+ size_t l;
+ int err;
+
+ err = efi_get_variable(EFI_VENDOR_GLOBAL, "BootOrder", NULL, &buf, &l);
+ if (err < 0)
+ return err;
+
+ if (l == 0) {
+ free(buf);
+ return -ENOENT;
+ }
+
+ if ((l % sizeof(uint16_t) > 0)) {
+ free(buf);
+ return -EINVAL;
+ }
+
+ *order = buf;
+ *count = l / sizeof(uint16_t);
+ return 0;
+}
+
static int read_usec(sd_id128_t vendor, const char *name, usec_t *u) {
_cleanup_free_ void *i = NULL;
_cleanup_free_ char *j = NULL;
diff --git a/src/shared/efivars.h b/src/shared/efivars.h
index d5cfb4f..d54cc43 100644
--- a/src/shared/efivars.h
+++ b/src/shared/efivars.h
@@ -28,9 +28,16 @@
#include "sd-id128.h"
#include "time-util.h"
+#define EFI_VENDOR_LOADER SD_ID128_MAKE(4a,67,b0,82,0a,4c,41,cf,b6,c7,44,0b,29,bb,8c,4f)
+#define EFI_VENDOR_GLOBAL SD_ID128_MAKE(8b,e4,df,61,93,ca,11,d2,aa,0d,00,e0,98,03,2b,8c)
+
bool is_efiboot(void);
int efi_get_variable(sd_id128_t vendor, const char *name, uint32_t *attribute, void **value, size_t *size);
+char *efi_get_variable_string(sd_id128_t vendor, const char *name);
+
+int efi_get_boot_option(uint32_t nr, uint32_t *attributes, char **title, sd_id128_t *partuuid, char **path, char **data, size_t *data_size);
+int efi_get_boot_order(uint16_t **order, size_t *count);
int efi_get_boot_timestamps(const dual_timestamp *n, dual_timestamp *firmware, dual_timestamp *loader);
diff --git a/src/shared/utf8.c b/src/shared/utf8.c
index 7ec8cb6..3964e8b 100644
--- a/src/shared/utf8.c
+++ b/src/shared/utf8.c
@@ -317,6 +317,6 @@ char *utf16_to_utf8(const void *s, size_t length) {
}
*t = 0;
- return r;
+ return r;
}
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