+int efi_get_boot_options(uint16_t **options) {
+ _cleanup_closedir_ DIR *dir = NULL;
+ struct dirent *de;
+ uint16_t *list = NULL;
+ int count = 0, r;
+
+ assert(options);
+
+ dir = opendir("/sys/firmware/efi/efivars/");
+ if (!dir)
+ return -errno;
+
+ FOREACH_DIRENT(de, dir, r = -errno; goto fail) {
+ int id;
+ uint16_t *t;
+
+ if (strncmp(de->d_name, "Boot", 4) != 0)
+ continue;
+
+ if (strlen(de->d_name) != 45)
+ continue;
+
+ if (strcmp(de->d_name + 8, "-8be4df61-93ca-11d2-aa0d-00e098032b8c") != 0)
+ continue;
+
+ id = boot_id_hex(de->d_name + 4);
+ if (id < 0)
+ continue;
+
+ t = realloc(list, (count + 1) * sizeof(uint16_t));
+ if (!t) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ list = t;
+ list[count ++] = id;
+ }
+
+ qsort(list, count, sizeof(uint16_t), cmp_uint16);
+
+ *options = list;
+ return count;
+
+fail:
+ free(list);
+ return r;
+}
+