Help on QProcess - Output Read

[augusbas]

Hi,

I am running the below process in my application

QProcess *myProcess = new QProcess(this);
 myProcess->start("/EXEC/Unlock");
 myProcess->waitForFinished();
 //qDebug() << "Unlock Output:" << myProcess->readAll(); 
 qDebug() << "Unlock Output:\n" << myProcess->readAllStandardOutput();
 QByteArray newData=myProcess->readAllStandardOutput();
  qDebug() << "Unlock Output:" << newData;

QProcess *myProcess = new QProcess(this);
 myProcess->start("/EXEC/Unlock");
 myProcess->waitForFinished();
 //qDebug() << "Unlock Output:" << myProcess->readAll(); 
 qDebug() << "Unlock Output:\n" << myProcess->readAllStandardOutput();
 QByteArray newData=myProcess->readAllStandardOutput();
  qDebug() << "Unlock Output:" << newData;

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But the output i read from the read using all the above methods gives empty string.

Help me


In my Process application I will put the below output in console:

qDebug() << "FileName Output:" << fileName;

qDebug() << "FileName Output:" << fileName;

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[augusbas]

Hi,

I am running the below process in my application

QProcess *myProcess = new QProcess(this);
 myProcess->start("/EXEC/Unlock");
 myProcess->waitForFinished();
 //qDebug() << "Unlock Output:" << myProcess->readAll(); 
 qDebug() << "Unlock Output:\n" << myProcess->readAllStandardOutput();
 QByteArray newData=myProcess->readAllStandardOutput();
  qDebug() << "Unlock Output:" << newData;

QProcess *myProcess = new QProcess(this);
 myProcess->start("/EXEC/Unlock");
 myProcess->waitForFinished();
 //qDebug() << "Unlock Output:" << myProcess->readAll(); 
 qDebug() << "Unlock Output:\n" << myProcess->readAllStandardOutput();
 QByteArray newData=myProcess->readAllStandardOutput();
  qDebug() << "Unlock Output:" << newData;

To copy to clipboard, switch view to plain text mode 

But the output i read from using all the above methods gives empty string.

Help me


In my Process application I will put the below output in console:

qDebug() << "FileName Output:" << fileName;

qDebug() << "FileName Output:" << fileName;

To copy to clipboard, switch view to plain text mode 

Anybody please help

[wirasto]

I think you can read this thread

http://www.qtcentre.org/forum/f-qt-p...light=QProcess

He read ping output...

[augusbas]

I think you can read this thread

http://www.qtcentre.org/forum/f-qt-p...light=QProcess

He read ping output...

Hi,

thanks for reply...

In my process application, i am trying to put data through qdebug i.e I am printing a QString.

Whether this is the right way to put standard output data?

And i am reading the data in my application through readAllStandardOutput() ; But my output is empty string.

I referred the link send by you, still for me the same output "Empty String"

need your help

[faldzip]

qDebug() puts output on standard error so if you want to read output from qDebug() just read standard error: QProcess::readAllStandardError()

[augusbas]

qDebug() puts output on standard error so if you want to read output from qDebug() just read standard error: QProcess::readAllStandardError()

Thanks Buddy.. it worked