Qt启动进程ping网址

void TcpClient::run()
{   
    QProcess *cmd = new QProcess;
    QString strCmd = QString("ping %1 -n 1-w %2").arg(m_strDestIP).arg(m_pingTime);
    while (1)
    {
        cmd->start(strCmd);
        // 等待ping 的结果
        cmd->waitForReadyRead();
        cmd->waitForFinished(-1);//等待ping完成
        QString result = cmd->readAll();

        if(-1 == result.indexOf("TTL"))
        {
            m_isTcpSmooth = false;//切换成网络不畅通状态
            g_tempPara_station.status = false;
            qDebug() << myHelper::Instance()->getSystemTime() << "离线";
            emit pingError();//发送网络ping不通的信号
        }
        else
        {
            qDebug() << myHelper::Instance()->getSystemTime() << "在线";
            QThread::sleep(1);
        }
        
    }
}