I start rsync in QProcess. My process runs fine (in its own terminal) if I use QProcess::startDetached()
but nothing happens if I start it with QProcess:start()
. The problem seems to be that QProcess can't apparently read messages from rsync and write it to the output window.
I have connect this signal in constructor.
MainWindow::~MainWindow()
{
process = new QProcess(this);
connect( process, SIGNAL(readyReadStandardOutput()), this, SLOT(onReadyReadStandardOutput() ) );
}
Later on button clicked I call:
void MainWindow::onButton1Clicked()
{
process->start("rsync -a root@10.0.0.1:/path/ /rsync_folder");
//process->start("ping 10.0.0.01"); // this works for testing and I see output but not the above.
}
When rsync starts, it prints a message and ask for password..none of it is received by my QProcess but the ping
message are received..what could be possibly wrong here?
The above grieving line also works directly on windows 7 command line but it just doesn't seem to show any progress in QProcess.
Update
Here is how I displaying the output.
void MainWindow::onReadyReadStandardOutput()
{
qDebug() << process->readAllStandardOutput();
}
http://doc.qt.io/qt-5/qprocess.html#communicating-via-channels
Did you remember to link to and check the standard error channel?
http://doc.qt.io/qt-5/qprocess.html#readAllStandardError
That has fixed it for me in the past for some QProcesses I have started.
Another way I've done it, is to use QProcess::startDetached();
Hope that helps.
我的研究表明,rsync的行为可能类似于scp,因此,该答案在重定向时不会生成输出。
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