Can't send a Ctrl-C to a QProcess (Win32)

[wysota]

Sorry, yes, Ctrl+C is SIGINT. Nevertheless using terminate() is the way to go. Unfortunately console applications don't support being killed by terminate(). What you can do is try to send the SIGINT signal yourself to the other process using ::kill() (your system should support it).

[hg]

Sorry for the late entrance, but it would seem this is still a valid discussion. I have just solved the problem under Windows 7 with Qt5 by closing the stream to stdin of the child process. I.e. process->close() instead of process->terminate(). The child process was then gracefully able to shut down.

[wysota]

Maybe because your child program ends when it gets end of stream on its stdin. It's not the case for any program.

[hg]

My scenario works from command line, but not via QProcess, not even using close() as I suggested earlier. This is very curious, as there seem to be a way of signaling the console application (i.e node.exe in my case) to close, but it is not used by QProcess::terminate(). I have solved my particular problem by writing a shutdown command to stdin and reading it in the child process, but it is not a generic solution.

A similar discussion is found on qt-project: http://qt-project.org/forums/viewthread/28029

[wysota]

A well-behaved process should terminate itself when receiving SIGTERM which is what QProcess::terminate() sends.

[yeye_olive]

This reply comes a bit late.

It is unfortunate that Windows' API does not deal with GUI and console processes in a uniform way. The documentation of QProcess::terminate() clearly states that it only supports the former kind. In you case, I suggest -- for lack of a better solution -- that you rely on platform-specific API for console processes; the GenerateConsoleCtrlEvent function looks promising.