qt获取本机用户名

//获取用户名
QString getUserName()
{
#if 1
    QStringList envVariables;
    envVariables << "USERNAME.*" << "USER.*" << "USERDOMAIN.*"
                 << "HOSTNAME.*" << "DOMAINNAME.*";
    QStringList environment = QProcess::systemEnvironment();
    foreach (QString string, envVariables) {
        int index = environment.indexOf(QRegExp(string));
        if (index != -) {
            QStringList stringList = environment.at(index).split('=');
            if (stringList.size() == ) {
                return stringList.at();
                break;
            }
        }
    }
    return "unknown";
#else
    QString userName = QStandardPaths::writableLocation(QStandardPaths::HomeLocation);
    userName = userName.section("/", -, -);
    return userName;
#endif
}