KIO::is_manually_mounted() and device UUIDs

[David Faure]

On Thursday 26 April 2007, Kevin Ottens wrote:
> Le jeudi 26 avril 2007 01:08, David Faure a écrit :
> > KIO::is_manually_mounted() greps /etc/fstab for the "noauto" option, for a
> > given device. But this doesn't work anymore, now that kubuntu converted
> > /etc/fstab to use UUIDs instead of device names:
> >
> > # /dev/sda7 -- converted during upgrade to edgy
> > UUID=2c31247e-d3a0-11da-bd28-314ffa00bcaa /home ext3 defaults 0 2
> >
> > I tried using KMountPoint::currentMountPoints with
> > KMountPoint::NeedMountOptions but this doesn't help, because /etc/mtab
> > keeps the mount options but not "noauto" (since it doesn't care about it).
> >
> > Any other ideas? How would I go about finding the uuid of a given device?
> 
> What about using Solid::Volume::uuid()?
>
> Actually if you have an uuid you can get the device which match it using a 
> predicate like: "Volume.uuid == 'uuid'", it'll get you the only device which 
> match it, then calling d.as<Block>()->device() will get you the device node 
> for instance.

That sounds great. Too bad KMountPoint is in kdecore and kdecore doesn't link to solid
(kio does; and solid links to kdecore)....

The reason KMountPoint is in kdecore is only because of Type=FSDevice desktop files
Those are the device files that users can create (since kde1) using RMB / Create New / Link to device / ...
I guess we still need to support those?
They need KMountPoint for their icon (mounted != unmounted, but that's KMountPoint::currentMountPoints,
which gets device names, so no problem there...) and for their url in KDesktopFile::readUrl() (but that
code looks wrong to me -- all such desktop files that I can see have a MountPoint entry anyway,
so we could just use that).

I toyed with the idea of letting KMountPoint::possibleMountPoints() read
mountedFrom="UUID=361573af-cdad-4564-a315-6df1b78295a8" and sorting it
out in the calling code, but that seems to lead to horribly duplicated code...
So, the fix needs to be in kmountpoint and I don't see how to move kmountpoint up
unless we split mtab and fstab parsing, which seems bad....
=> how about we merge solid and kdecore?

-- 
David Faure, faure at kde.org, sponsored by Trolltech to work on KDE,
Konqueror (http://www.konqueror.org), and KOffice (http://www.koffice.org).