qt中调用linux命令

#include <QProcess>
#include <QDebug>

void runCommand() {
    QProcess process;
    // 启动ls命令
    process.start("ls", QStringList() << "-l");
    
    // 等待命令执行完成
    if (!process.waitForStarted()) {
        qDebug() << "Failed to start process.";
        return;
    }
    
    if (!process.waitForFinished()) {
        qDebug() << "Process failed.";
        return;
    }
    
    // 获取标准输出
    QByteArray output = process.readAllStandardOutput();
    qDebug() << "Output:" << output;
    
    // 获取标准错误
    QByteArray error = process.readAllStandardError();
    if (!error.isEmpty()) {
        qDebug() << "Error:" << error;
    }
}

#include <cstdlib>
#include <iostream>

void runCommand() {
    int ret = system("ls -l");
    if (ret == -1) {
        std::cerr << "Failed to execute command." << std::endl;
    }
}

#include <cstdio>
#include <iostream>
#include <memory>

void runCommand() {
    std::array<char, 128> buffer;
    std::string result;
    std::shared_ptr<FILE> pipe(popen("ls -l", "r"), pclose);
    if (!pipe) throw std::runtime_error("popen() failed!");
    while (fgets(buffer.data(), buffer.size(), pipe.get()) != nullptr) {
        result += buffer.data();
    }
    std::cout << "Output:\n" << result;
}