bootctl: add boot loader and firmware interface tool

.gitignore

@@ -2,6 +2,7 @@
 /TAGS
 /accelerometer
 /ata_id
+/bootctl
 /build-aux
 /cdrom_id
 /collect

Makefile.am

@@ -3069,7 +3069,6 @@ timedatectl_LDADD = \
 
 bin_PROGRAMS += \
 	timedatectl
-
 endif
 
 polkitpolicy_in_files += \
@@ -3078,6 +3077,21 @@ polkitpolicy_in_files += \
 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/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;
+}

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;
+}

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);