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

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.