linux qt 获取网关

#include <QCoreApplication>
#include <QDebug>
#include <QProcess>

QString getGateway() {
    QProcess process;
    process.start("ip", QStringList() << "route" << "show");
    process.waitForFinished();
    QString output = process.readAllStandardOutput();

    // 解析输出以找到默认网关
    QRegularExpression re("default via ([0-9.]+)");
    QRegularExpressionMatch match = re.match(output);
    if (match.hasMatch()) {
        return match.captured(1);
    }
    return QString();
}

int main(int argc, char *argv[]) {
    QCoreApplication a(argc, argv);

    QString gateway = getGateway();
    if (!gateway.isEmpty()) {
        qDebug() << "Default Gateway:" << gateway;
    } else {
        qDebug() << "Failed to retrieve gateway information.";
    }

    return a.exec();
}