diff options
Diffstat (limited to 'src/boot/boot-efi.c')
| -rw-r--r-- | src/boot/boot-efi.c | 171 |
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; +} |