Merge "Check the existence of raft dir." into nyc-mr1-dev

        MYLOGD("raft_log_path is empty\n");

        return;

    }

    struct stat s;

    if (stat(RAFT_DIR, &s) != 0 || !S_ISDIR(s.st_mode)) {

        MYLOGD("%s does not exist or is not a directory\n", RAFT_DIR);

        return;

    }

    if (!zip_writer) {

        // Write compressed and encoded raft logs to stdout if not zip_writer.

        run_command("RAFT LOGS", 600, "logcompressor", "-r", RAFT_DIR, NULL);