QDir.entryList

[jamat13]

I'm trying to get a list from /sys/class/video4linux but my list is empty.
I do set the QDir:Files | QDir::System in the QFile call and in the entryList call but my list remains empty. Surely there is a way ...

[Paul Colby]

Hi @jamat13, it would help if you can show us your code.

However, at a guess, I'd say you need to include QDir::Dirs too, because that directory (at least on my distro) contains only symlinks to directories. So I would try QDir::AllDirs|QDir::AllEntries|QDir::System to start with, and work back from there. If that doesn't work, show us the relevant QDir code :)

Edit: did a quick test. Here's some sample code, and the resulting output, at least for my host (Ubuntu 22.10):

    const QDir dir(QStringLiteral("/sys/class/video4linux"));
    qDebug() << dir.entryList();                                // (".", "..", "video0", "video1")
    qDebug() << dir.entryList(QDir::Files|QDir::System);        // ()
    qDebug() << dir.entryList(QDir::Dirs);                      // (".", "..", "video0", "video1")
    qDebug() << dir.entryList(QDir::Dirs|QDir::NoDotAndDotDot); // ("video0", "video1")

Cheers.

[jamat13]

Paul thanks, I was being an utter dork, ofcourse they are directories not files