using QTextStream to read stdin in a non-blocking fashion

Question

Using Qt, I\'m attempting to read the contents of the stdin stream in a non-blocking fashion. I\'m using the QSocketNotifier to alert me when the socket has recieved some ne

Answer 1

I've found and example in other answer that fits almost to this question and with complete and simple code:

https://stackoverflow.com/a/7389622/721929

I've used it to implement a QT console based app with a textual menu to choose on user selection.

Answer 2

Line buffering.

Default is flushing after a "\n". If you write 5 lines to your process, your slot gets called 5 times. If you want to avoid that, you have to call setbuf(stdin, _IOFBF). But even then it is not guaranteed you can read arbitrarily large amounts of data in one chunk.

Edit: It would probably better to use QTextStream::atEnd() instead of select, since QTextStream has its own internal buffers.