bootctl: add boot loader and firmware interface tool

1 files changed, 131 insertions, 0 deletions

diff --git a/src/boot/boot-loader.c b/src/boot/boot-loader.c
new file mode 100644
index 0000000000..bd563da226
--- /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;
+}