bootctl: add boot loader and firmware interface tool

5 files changed, 662 insertions, 0 deletions

diff --git a/src/boot/boot-efi.c b/src/boot/boot-efi.c
new file mode 100644
index 000000000..32cb973cf
--- /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 000000000..bd563da22
--- /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 000000000..08827c30a
--- /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 000000000..90e45ccd6
--- /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 000000000..641546bc0
--- /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;
+}