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Bug
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Resolution: Incomplete
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P3: Somewhat important
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None
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4.7.0
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None
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OpenSUSE 11.3 with qt 4.7.0 + kde SC 4.5.2 Qt compiled according to the kde manual.
I open QFile object on the fifo file. Use QSocketNotifier to understand when data arrives (connect it`c activate signal to the my slot). So In this slot QFile::bytesAvaliable always return zero!.
some code:
SomeClass::SomeClass()
{
....
channel = new QFile("../channel");
notifier = new QSocketNotifier(channel->handle(), QSocketNotifier::Read, this);
connect(notifier, SIGNAL(activated(int)), this, SLOT(read(int)));
....
}
SomeClass::read(int desc)
{
qDebug() << channel.bytesAvailable(); //This always print zero! But
int canRead = 0;
qDebug() << "ioctl result:" << ioctl(desc, FIONREAD, &canRead); // This print right value - there is non zero data!
}
Is it a bug in Qt? Or I do something wrong. I think it is a bug because it is a similar to the http://www.qtcentre.org/threads/20268-Non-blocking-stream-read and it doesn`t work for me.