How to reset after call to QProcess::setStandardOutputFile so that outout is directed to stdout agai-CodePudding

Here's a snippet of code to explain what I am trying to do

    QProcess* myProcess = new QProcess();
    myProcess->start("echo test1");
    myProcess->waitForFinished();

    myProcess->setStandardOutputFile("my_file_path");
    myProcess->start("echo test2");
    myProcess->waitForFinished();

    myProcess->start("echo test3");

Here I want "test1" and "test3" to go to stdout and "test2" to file. However "test3" is also echoed to file. I would to reset the QProcess to redirect out to stdout again after "test2"

How do I do this?

PS: This snippet is not the actual code. It just demonstrates the issue I am facing.

CodePudding user response：

The solution is simply setting the standard output file to an empty string by "", QString(), {}, etc. It would be helpful if the documentation was explaining that hidden gem. I will submit a merge request later to update the documentation.

This code demonstrates the intended behaviour:

#include <QCoreApplication>                                                     
#include <QProcess>                                                             
                                                                                
int main(int argc, char *argv[])                                                
{                                                                               
  QCoreApplication app(argc, argv);                                             
                                                                                
  QProcess* myProcess = new QProcess();                                         
  myProcess->start("echo", {"test1"});                                          
  myProcess->waitForFinished();                                                 
                                                                                
  myProcess->setStandardOutputFile("my_file_path");                             
  myProcess->start("echo", {"test2"});                                          
  myProcess->waitForFinished();                                                 
                                                                                
  myProcess->setStandardOutputFile({});                                         
  myProcess->start("echo", {"test3"});                                          
                                                                                
  return app.exec();                                                            
}

Please note that you should not use the

UPDATED:

Another way that I try is that use