程序调用shell设置ip地址

通过脚本设置ip地址和网关：

std::string setip = "ifconfig eth0 " +lineEdit_NetIp->text().toStdString() + " netmask " + lineEdit_NetMask->text().toStdString() + " && echo 1";
    std::string setroute = "echo 1;route del default;route add default gw " + ui->lineEdit_NetGate->text().toStdString();
    FILE *fp = popen(setip.c_str(), "r");
    if (NULL == fp)
    {
        msgBox.setInformativeText(tr("The IP address is unusable!"));
        msgBox.exec();
        return;
    }
    char getway[16] = {0};
    if (NULL == fgets(getway, 16, fp))
    {
        pclose(fp);
        msgBox.setInformativeText(tr("The IP address is unusable!"));
        msgBox.exec();
        return;
    }
    if (getway[0] != '1')
    {
        msgBox.setInformativeText(tr("The IP address is unusable!"));
        msgBox.exec();
        return;
    }    
    pclose(fp);
    fp = NULL;

fp = popen(setroute.c_str(), "r");
    if (NULL == fp)
    {
        msgBox.setInformativeText(tr("The route address is unusable!"));
       msgBox.exec();
        exit(0);
   }

   char route[16] = {0};

   if (NULL == fgets(route, 16, fp))
   {
        pclose(fp);
        msgBox.setInformativeText(tr("The route address is unusable!"));
        msgBox.exec();
        exit(0);
   }
    pclose(fp);

    if (route[1] != 0)
   {
       msgBox.setInformativeText(tr("The route address is unusable!"));
        msgBox.exec();
        exit(0);
    }