[Interest] Possible bug: QStorageInfo does not show private mounts (Linux)

[Marian Beermann]

QStorageInfo::mountedVolumes does not return private mounts, which are
usually located under the /run tree (e.g.
/run/media/$USERNAME/$DEVICENAME/).

Is this a bug or intended behaviour?

> QStorageInfo::mountedVolumes()
> Returns the list of QStorageInfo objects that corresponds to the list
of currently mounted filesystems.
>
> On Unix operating systems, it returns the list of all mounted
filesystems (except for pseudo filesystems).

Seems like a bug to me, since a mounted thumb drive (for example) isn't
a pseudo filesystem.

This behaviour is triggered by isPseudoFs function in qstorageinfo_unix.cpp:

-- snip --

static bool isPseudoFs(const QString &mountDir, const QByteArray &type)
{
    if (mountDir.startsWith(QLatin1String("/dev"))
        || mountDir.startsWith(QLatin1String("/proc"))
        || mountDir.startsWith(QLatin1String("/run"))
        || mountDir.startsWith(QLatin1String("/sys"))
        || mountDir.startsWith(QLatin1String("/var/run"))
        || mountDir.startsWith(QLatin1String("/var/lock"))) {
        return true;
    }
#if defined(Q_OS_LINUX)
    if (type == "rootfs")
        return true;
#else
    Q_UNUSED(type);
#endif

    return false;
}

-- snip --

Maybe it would be better to have a blacklist of FS types. This would
work very well, especially when discarding volumes mounted under a
blacklisted FS ; e.g. when blacklisting sysfs one doesn't need to care
about all the different filesystems the kernel uses there. First few
things that come to mind when considering types for a blacklist: proc,
sysfs, devtmpfs, configfs, kernfs.