+ time_t now = time (NULL);
+ struct tm *gm_time = gmtime (&now);
+
+ /* since dump files are written atomically, the amount of
+ * harm from overwriting one within a second seems
+ * relatively small. */
+
+ const char *backup_name =
+ talloc_asprintf (notmuch, "%s/dump-%04d%02d%02dT%02d%02d%02d.gz",
+ dot_notmuch_path,
+ gm_time->tm_year + 1900,
+ gm_time->tm_mon + 1,
+ gm_time->tm_mday,
+ gm_time->tm_hour,
+ gm_time->tm_min,
+ gm_time->tm_sec);
+
+ if (add_files_state.verbosity >= VERBOSITY_NORMAL) {