程序调用shell设置ip地址

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);
}