QProcess issue in executing a exe with arguments - c++

Question

I have a issue in setting the QProcess to run executable with the arguments. The Qt code for the same is as below,
QString program = "C:\Setup.exe";
QStringList arguments;
arguments << "-uninstall";
QProcess::startDetached(program, arguments);
The output of this snippet is to uninstall some program. But it is not happening. Am i doing any mistake?
But if I go to cmd prompt and execute the same thing like.,
c:/> "C:/Setup.exe" -uninstall
This works perfectly.

Answer 1

There are at least two options to solve your issue.
Use '/' for directory separators as per documentation:
If you always use "/", Qt will translate your paths to conform to the underlying operating system.
Escape the backslash whenever working with file paths as string as per an example from the documentation:
env.insert("TMPDIR", "C:\\MyApp\\temp"); // Add an environment variable
env.insert("PATH", env.value("Path") + ";C:\\Bin");
Therefore, you should be writing something like this:
QString program = "C:/Setup.exe";
QStringList arguments;
arguments << "-uninstall";
QProcess::startDetached(program, arguments);
or this:
QString program = "C:\\Setup.exe";
QStringList arguments;
arguments << "-uninstall";
QProcess::startDetached(program, arguments);
In general, when facing such issues, you could always print out the error string to get more information by using the following syntax:
qDebug() << myProcess.errorString();
This, for sure, needs an instance, however.