bootctl: add boot loader and firmware interface tool

1 files changed, 271 insertions, 0 deletions

diff --git a/src/boot/bootctl.c b/src/boot/bootctl.c
new file mode 100644
index 0000000000..641546bc08
--- /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;
+}