Using QProcess to call an external program, with arguments

Question

I have a exe folder located in one folder, and then all of my config files in another. In order to run the program:

• I need to direct the terminal to the config file folder
• Then run the exe folder, with arguments.

Shown below, I have this working correctly using system calls, but I need a system agnostic way of doing this.

void MainWindow::on_pushButton_clicked()
{
    std::system("cd Path_To_ConfigFolder & Absolute_Path_To_Exe RunFile.txt > logfile.txt");
}

The above works great. Although it only works on Windows.. so I did some research on using QProcess to create a more system agnostic way.. and no matter what I try I can't seem to get this to work. See below:

void MainWindow::on_pushButton_clicked()
{
    QProcess p;
    QStringList params;
    p.setWorkingDirectory("Path_To_ConfigFolder");
    params << " RunFile.txt > logfile.txt";
    p.start("Absolute_Path_To_Exe", params);
    p.waitForFinished(-1);
}

Note: For the above example (using QProcess), I am \\\\ for all my paths, and all my paths are correct.

What am I doing wrong here?

Answer 1

Name of executable would be starting with ".\\" if it is in local folder to be system-agnostic. Linux shell and PowerShell require that.

">" - output redirection isn't an argument of process, that won't work. You have to redirect output channel to your or a secondary process.

p.setStandardOutputFile("log_file.txt")