29/06/2006 à 19h50 : GUADEC 2006

On Tuesday and Wednesday, I was with nono and huats at the GUADEC 2006 in Vilanova.
There were some interesting talks, and it was a good opportunity to meet others geeks, especially people from http://planet.gnome.org/.
The events was sponsored by Nokia, and so we could not miss their key product, the Nokia 770.
On Tuesday evening there was a party with champagne, food, music and a projection of the Spain - France match. And of course, we won and we showed it!


You will find more photos here : http://www.flickr.com/photos/tags/guadec2006/.
Thanks again to huats for the trip!

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16/06/2006 à 17h06 : AJAX

Hier j'ai eu l'opportunité d'intervenir dans le cadre du Master 2 GLR (nouveau nom du DESS Informatique Fondamentale).
On m'a en effet proposé de présenter AJAX aux étudiants, et l'expérience était assez sympa.
Comme ça c'est plutôt bien passé (enfin c'est ce qu'on m'a dit ;)) je devrais pouvoir renouveller et élargir mes interventions l'année prochaine.
Pour ceux que ça intéresse, vous pouvez regarder mes slides et les démos : AJAX.zip.
Par contre c'est pas "libre" donc merci de laisser mon nom sur la présentation :)
Bien sûr je n'ai pas pu m'empêcher de faire de la pub déguisée pour pxchat à la fin, malgré le succès (très) limité de ce site :-p

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10/06/2006 à 13h48 : Transformation !







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07/06/2006 à 23h25 : PhotoRec, the magic tool

This week-end, one computer at home almost died.
It had a disk with a huge FAT32 partition, storing many data such as holidays photos and videos.
For an unknown reason it was not possible to access many folders and files, while we were still able to view most of the directory structures.
As during my previous crash, I installed this disk on my Linux box, and started building an image of this disk in case it goes worse.
dd if=/dev/hdd3 of=big.img conv=noerror,notrunc,sync bs=512
First good news, the hardware was safe, the crash was not due to a broken disk, but just some data was corrupted on it.
Since the first computer is running Windows, this is not a big surprise ;)
I could guess the hardware was ok because the copy was very quick and did not raise any input/output error.
First I tried the fsck.vfat tool, but the tool kept looping in a broken directory, finding thousands of files with stranges names which never existed...
Then I tried TestDisk without success too : the partitions were not broken.
So we have a disk which still works (hardware) but with a broken fat table and many files not accessible on it.
Here comes PhotoRec, this tool is awesome.
The basic idea is : the data is somewhere on the disk, and since files are usually not fragmented, it is going to scan the whole disk (sector by sector) and recognize "known headers" to recover files.
So you end up with unamed folders filled with unamed files, but at least unlike "scandisk" or "fsck" recovered files, you have an extension (.jpg, .avi, etc).
Now the big work has to begin, sort all this files (most of them were photos).
Here another tool was very helpfull : exiftags.
Since all photos were taken with digital cameras storing date/time of the picture, it was easy to rename the files and sort them by date.
I wrote the following ugly script, but it worked:
find photorec | egrep jpg$ | while read i
do
  date=`exiftags $i 2> /dev/null | fgrep 'Image Created' | cut -f3
- -d' ' | sed s/':'//g | sed s/' '/-/g`
  file=`echo $i | cut -f3 -d/`
  mv -v "$i" sorted/"$date-$file"
done
I suppose there are already command line tools for mass renaming based on exif tags...
So before you have anonymous names like this:
f35806.jpg
f35807.jpg
f35808.jpg
f8612.jpg
f8613.jpg
And after you have something nicer:
20031207-141309-f35806.jpg
20031207-141314-f35807.jpg
20031207-141320-f35808.jpg
20040608-194705-f8612.jpg
20040608-194732-f8613.jpg
This tool (PhotoRec) saved our data, and this is great :)

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04/06/2006 à 21h09 : Avis aux footeux

J'ai créé un site web pour organiser des pronostics sur la coupe du monde : http://worldcup.pronostiks.com/.
Si ça vous intéresse, on pourra se monter un championnat entre blogueurs :-p
Et si ça vous intéresse pas, tant pis pour moi, ça fera un site flop de plus !

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