Question

我在Qt编写程序，目前使用popen运行linux命令并将输出读入字符串：

    QString Test::popenCmd(const QString command) {
    FILE *filePointer;
    int status;
    int maxLength = 1024;
    char resultStringBuffer[maxLength];
    QString resultString = "";

    filePointer = popen(command.toStdString().c_str(), "r");
    if (filePointer == NULL) {
        return 0;
    }

    while (fgets(resultStringBuffer, maxLength, filePointer) != NULL) {
        resultString += resultStringBuffer;
    }
    status = pclose(filePointer);
    if (status == 0) {
        return resultString;
    } else {
        return 0;
    }
}

所以我想抛弃上面的代码，因为我更愿意使用Qt提供的更高级别的设施。有没有人有一个如何用QProcess做这个的例子，或者至少知道如何做到这一点？

对于它的价值，这将在Linux上运行。

谢谢

Answer 1

这样做：

void Process::runCommand(const QString &p_Command) {
    QProcess *console = new QProcess();
    console->connect(console, SIGNAL(readyRead()), this, SLOT(out()));
    console->connect(console, SIGNAL(finished(int)), this, SLOT(processFinished(int)));
    console->start(p_Command);
}

void Process::out() {
    QProcess *console = qobject_cast<QProcess*>(QObject::sender());
    QByteArray processOutput = console->readAll();
}

void Process::processFinished(int p_Code) {
    QProcess *console = qobject_cast<QProcess*>(QObject::sender());
    QByteArray processOutput = console->readAll() + QString("Finished with code %1").arg(p_Code).toLatin1();
}

信号QProcess::finished()可用于获取流程的退出代码。

如何获取使用QProcess调用的程序的返回标准输出？

1 个答案: