Re: [Tracker] usb detection alternatives

[Martyn Russell <martyn lanedo com>]

On 28/02/12 14:08, John stacy wrote:
> Hello Team,

Hello,

> I have a basic questions on the USB Volume identification of tracker.
>
> My basic understanding about the detection is as follows.
>
> 1. It depends on the gvfs -> udisks package for the Volume identification.
> 2. If gvfs is not present in the system then it simply monitors the
> /etc/mtab file.
>
> Please correct me if I am wrong in the above points.

Yes, I believe so. This is all done via the glib APIs of course.

> Now, In my system I have my own notification mechanism ( No UDEV,UDISKS
> and GVFS) and I dont want to depend on the /etc/mtab as it is linked to
> the /proc/mounts.
>
> Is there any other way that I can notify the tracker for media
> insertions and removals? My end goal is that tracker should consider the
> USB as removable media.

You could patch our code to statically know about devices/locations if 
you wanted a quick fix there. The code is here:

For master:


http://git.gnome.org/browse/tracker/tree/src/libtracker-miner/tracker-storage.c

Not sure what version you're using but that file hasn't changed much 
recently anyway.

> I was modifying the miner configuration file (IndexRecursiveDirectories
> field) for every insertion and removals. In this case, it is not
> considering the USB as a removable media.

There have been a few fixes in these areas recently (0.12.x and master), 
for 0.10.x it might be that we need to cherry-pick those fixes onto the 
tracker-0.10 branch too. I noticed an issue on initial indexing when the 
DBs are created and added a fix recently. See:


http://git.gnome.org/browse/tracker/commit/src?id=ec03ea6fad5bfde565425135b8d5b80800e98f1e

> Please throw some light on the same. Are there any API's available to
> just stich the underlying notification mechanism to the existing
> tracker. BTW I am using tracker 0.10.37 version.

Yea, I think the best thing to do here would be to patch the storage 
file to your liking. The API we provide is quite limited and should be 
easy enough to support for your local system:


http://git.gnome.org/browse/tracker/tree/src/libtracker-miner/tracker-storage.h

It would need some testing of course, I have no idea how well it would 
work, but that's where I would start if you prefer none of the glib 
variants and want something quick to play with.

--
Regards,
Martyn

Founder and CEO of Lanedo GmbH.