QProcess problem with windows batch file

[bood]

It affects the place QProcess looks for the file. Look, that you have given a relative path (dir/file) to that file, so QProcess looks for it there and only there.

I don't think so...

QProcess always looks for the file from the working directory of the process in which QProcess runs. And what QProcess::setWorkingDirectory sets is the working directory of the created process, they are different.

And if you're right, there's no reason that it works well when dealing with exefile. You can try replacing the test.bat with an ordinary exefile, and change the macro EXE defined in main.cpp correspondly. You'll find everything works fine.

[wysota]

Oh, you're calling a QProcess::setWorkingDirectory() method... You're right then, it doesn't influence where QProcess looks for the program.

How does your script work?

[bood]

Oh, you're calling a QProcess::setWorkingDirectory() method... You're right then, it doesn't influence where QProcess looks for the program.

How does your script work?

Did you download my example in my first post?

The example has two QProcess, one without setWorkingDirectory called before calling start(QProcess1), while the other does(QProcess2). And both QProcess start a batch file called test.bat under `bin` directory(the batch file just has an echo command to output a string), then readAll is called to collect the output which is later presented in a QMessageBox. You'll find the output collected from QProcess1 is empty while the other works as I expected.

[wysota]

The process here isn't started at all, so it looks like setWorkingDirectory influences the way QProcess starts the process. The problem is with the script itself, so it seems.