int restartServer(int flags, mstime_t delay) {
    int j;

    /* Check if we still have accesses to the executable that started this
     * server instance. */
    if (access(server.executable,X_OK) == -1) return C_ERR;

    /* Config rewriting. */
    if (flags & RESTART_SERVER_CONFIG_REWRITE &&
        server.configfile &&
        rewriteConfig(server.configfile) == -1) return C_ERR;

    /* Perform a proper shutdown. */
    if (flags & RESTART_SERVER_GRACEFULLY &&
        prepareForShutdown(SHUTDOWN_NOFLAGS) != C_OK) return C_ERR;

    /* Close all file descriptors, with the exception of stdin, stdout, strerr
     * which are useful if we restart a Redis server which is not daemonized. */
    for (j = 3; j < (int)server.maxclients + 1024; j++) close(j);

    /* Execute the server with the original command line. */
    if (delay) usleep(delay*1000);
    execve(server.executable,server.exec_argv,environ);

    /* If an error occurred here, there is nothing we can do, but exit. */
    _exit(1);

    return C_ERR; /* Never reached. */
}

This label identifies security gaps where expected security features are missing or only partially implemented, reducing protection against unauthorized access or manipulation.