QProcess and Mac OS 10.6.7 Snow Leopard

[Olivia]

Hi
I have some problems with running terminal commands using QProcess. Is there any special way to do it?

Here is my code:

void MainWindow::on_actionCreate_triggered()
{
  p.start("tar -zcvf " + archivename + " " + filenames);
  bool success = p.waitForStarted();
  ui->textEdit->append(p.readAllStandardOutput());
  ui->textEdit_2->append(p.readAllStandardError());
  if(success)
  {
    std::cout << "tar -zcvf " + archivename.toStdString() + " " + 
                 filenames.toStdString() << std::endl;
  }
  p.terminate();
}

void MainWindow::on_actionCreate_triggered()
{
  p.start("tar -zcvf " + archivename + " " + filenames);
  bool success = p.waitForStarted();
  ui->textEdit->append(p.readAllStandardOutput());
  ui->textEdit_2->append(p.readAllStandardError());
  if(success)
  {
    std::cout << "tar -zcvf " + archivename.toStdString() + " " + 
                 filenames.toStdString() << std::endl;
  }
  p.terminate();
}

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My output:

Starting /Users/olivia/....app/Contents/MacOS/wtorek...
tar -zcvf archive.tgz *.h *.cpp

Of course I have tar and in Terminal.app everything is working.
I have Qt 4.7.2.