maintainer wanted for next generation tetrinet server!

You probably all know tetrinet – if you don’t, you should really try that game. There are several servers for that game out there, and one of them is tetrinetx. It is packaged in Debian, but it has several problems:

  • It doesn’t support tetrifast mode. So you have to deal with that stupid 1-second delay before the next block appears.
  • The code is truly horrible. From main.c:
    #include "dns.c"
    #include "utils.c"
    #include "net.c"
    #include "crack.c"
    #include "game.c"

    That gives you an idea, right ?

A few years ago, I worked with a few friends on improving tetrinetx. This resulted in:

  • Massive code cleanup
  • Tetrifast support
  • Stats stored in an MySQL DB, so you can compute nice stuff (time wasted per day, etc)
  • More stats: blocks drop rate, etc.

This is hosted on sourceforge under the name tetrinetx-ng, but it hasn’t seen any activity for the last two years.

It would really be great if a tetrinet fan could take over the project and start making it alive again. Then could support tetrifast ;)

Also, I could try to setup a server with tetrinetx-ng. Someone wants to host for me ? Needed: MySQL DB + Apache (for the stats), + not being afraid of insecure code (doesn’t need to run as root)

Distributed SCM and branching a sub-directory ?

I am considering switching from SVN to a distributed SCM for my personal stuff. I had a look at git and mercurial, but neither really support branching a sub-directory:

Often, I am working on a big private project, and, while working on a sub-project (stored inside the project’s repository), I’d like to share that sub-project with others. So there are actually two problems:

  • being able to checkout/branch/clone a sub-directory
  • possibility to control access on a per-directory basis

SVN only partially meets my needs with that (it’s possible to checkout a sub-directory directly, for example with svn co svn:// I think that it’s possible to do fine-grained access control
using libapache2-svn, but I haven’t tried yet.

It seems that mercurial can do that, using the forest extension. But you have to convert the specific directory into a repository, with a complex step to keep the history.

Amongst the distributed SCM, is there one that supports that ? (at least the sub-directory branching part)

Bash is weird.

Consider the following command:
echo <(cat /etc/{motd,passwd})

(you can replace "echo" with any command that takes one file as argument and cannot take it as stdin)

It's obvious that the goal is to expand this to:
echo <(cat /etc/motd /etc/passwd)

Then to:
echo /dev/fd/63

However, it doesn't work like this:
$ echo <(cat /etc/{motd,passwd}) ++ cat /etc/motd ++ cat /etc/passwd + echo /dev/fd/63 /dev/fd/62 /dev/fd/63 /dev/fd/62

But bash doesn't work like this. Brace expansion is done first, but inside parameters of the command (that is, <(cat /etc/{motd,passwd})) not words. So when <(cat /etc/{motd,passwd}) is expanded, the prefix is <(cat /etc/, the suffix is ")", so it's expanded to <(cat /etc/motd) <(cat /etc/passwd).

After reporting a bug about that, Chet Ramey gave me the correct way to reach the initial goal:
cat <(eval cat /etc/\{passwd,motd})

Most broken spam protection ever

Just received that, in reply to a mail I sent:

This email is from X.

My email address ( is protected against spam and viruses by MailInBlack.

Please click on the following link in order to identify yourself to me and to allow your message to reach me.

This needs to be done only once, for this email and all future email correspondence.

Thank you for your understanding.


MailInBlack seems to be a french company. No wonder why they guarantee that 100% of spams are stopped. (To be fair, I am not sure yet of who fucked up, it might be the admin)

Jabber clients and OS usage stats (3)

Using XMPP4R, I did some stats about Jabber clients usage on the Apinc Jabber server, which hosts,, and many more using virtual hosting. I already did similar stats in March 2006 and September 2005.

The poll was done by sending jabber:iq:version to online users, around 1:00 PM (french local time, most of the users are french). 1343 clients were pinged, and 1315 answered, which is better than last year (1145 answers). Of the 1145 jids that answered last year, 368 were also part of the poll this year (I don’t know if this is good, or not enough).


  • GNU/Linux: 43% (2006: 38% ; 2005: 34%)
  • Windows: 35% (2006: 37% ; 2005: 34%)
  • Mac OS: 16% (2006: 18% ; 2005: 23%)
  • Unknown: 4 (2006: 5% ; 2005: 6%)
  • Others: 0% (12 clients ; 2006: 0% ; 2005: 1%)


  • Psi: 24% (2006: 28% ; 2005: 28%)
  • gaim: 22% (2006: 25% ; 2005: 25%)
  • Gajim: 12% (2006: 5% ; 2005: 3%)
  • Kopete: 11% (2006: 7% ; 2005: 7%)
  • iChatAgent: 9% (2006: 13% ; 2005: 18%)
  • libgaim (Adium): 5% (2006: 4% ; 2005: 3%)
  • Pandion: 4% (2006: 4% ; 2005: 2%)
  • Miranda: 2% (2006: 2% ; 2005: 1%)
  • BitlBee: 2%
  • neos: 1%
  • Unknown client: 0%
  • Exodus: 0%
  • Imendio Gossip: 0%
  • Jabbin: 0%
  • Spark IM Client: 0%
  • Trillian: 0%
  • JBother: 0%
  • jabber.el: 0%
  • JETI: 0%
  • JAJC: 0%
  • Class.Jabber.PHP: 0%
  • Jabberwocky: 0%
  • Tkabber: 0%
  • Gush: 0%

(all clients with at least one reply are listed here)

I also did some stats on the Linux distros. With 566 Linux users, one can consider that statistically signifiant.

  • Client answers with the kernel version, not including distribution information: 62%
  • Debian: 14%
  • Ubuntu: 12%
  • Gentoo: 2%
  • Unknown distros (not provided by the client): 2%
  • Fedora Core: 1%
  • Arch Linux: 1%
  • Mandriva: 1% (despite the fact that most users are french!)
  • Slackware: 0%

(Other distros are below 5 replies)

The Debian/Ubuntu situation is interesting. Debian is not dying, even on the desktop ! The server is hosting, so the results are biased towards Ubuntu.

Update: it seems that Psi reports “Debian GNU/Linux (testing/unstable)” even when running on Ubuntu. This is the case for ~5% of linux users.

To server admins: if you are running a large jabber server with jabberd 1.6, it’s easy to give me the right to get the list of online users, so contact me if your are interested in me doing your users stats. It would be interesting to see if users from different servers/countries have different behaviours. I’m not sure if it’s possible with ejabberd and other servers.

Slides for my FOSDEM talks about Debian QA

As promised, the slides from my FOSDEM talks about Automated Testing of Debian Packages and Use of Grid Computing for Debian Quality Assurance are available.

Don’t hesite to ask questions or post comments. The videos for both talks should be available so you can laugh at my frenglish, but I haven’t heard of an ETA yet.

Efficient key signing

I just finished signing all the keys from the FOSDEM KSP.

Importing keys I received:
Mutt is nice. You can tag all messages with ‘t’, then use ‘;’ (tag-prefix) and ^K (Ctrl + K) to import all signatures. (Thanks Myon + sam for the tip)

Signing keys:
caff (featured on debaday last week) has some useful info in /usr/share/doc/signing-party/, especially the README.many-keys and README.gpg-agent files.

State of software for Suspend to RAM/Disk ?

Dear readers,

I am the mostly happy owner of a Dell Latitude D610 (the one with the ATI video card), running Debian Etch. I installed the hibernate package to try to get Suspend to RAM and to Disk to work, and Suspend to Disk worked out of the box. But Suspend to RAM didn’t work (garbled screen at resume).

I never bothered to investigate this until today, when I discovered that acpi-support provides the same functionality, and works both for Suspend to RAM and to Disk ! I’m happier now, but I would like to understand, and the world of ACPI and Suspend to RAM/Disk is very difficult to grasp for newcomers.

What is the story behind hibernate and acpi-support ? Why was this duplication of effort needed ? Also, it seems that gnome-power-manager and kpowersave provide the same functionality. Why can’t they just call the relevant acpi-support or hibernate scripts ? How do those different implementations compare (what are their main differences ?) ? Looking at the packages content, it seems that hibernate tries to be generic, while acpi-support gave up, and handles each and every laptop model differently. Correct ? Also, hibernate seems to be handling a few things better, like getting my network interface back up after hibernation.

Finally, the last question: how do one debug Suspend issues, when it fails to work ? Is there a document somewhere explaining that ?

Working evince and poppler in Debian Etch

Evince and poppler (the library used to render PDFs) are quite outdated in etch, and fail to display correctly a number of PDF files (including PDFs generated by latex-beamer). There’s a new poppler version (0.5.x, vs 0.4.5 in etch), but it bumps the soname, so it’s a no-go.

Since I was particularly annoyed by this (I’m an evince fan), I looked at the issue, and found that entry in poppler’s changelog for version 0.5.1:

2006-02-16  Albert Astals Cid

        * qt4/src/
        * qt/
        * poppler/
        * glib/ Update soname as we are not really compatible
        anymore with previous releases that had soname 0.0.0

And I thought that maybe, the soname update was not totally justified. I modified the package in experimental (v.0.5.4) to remove the soname bump, and renamed the binary packages so it becomes a drop-in replace for the version in etch.

It works fine for me with the version of evince in etch, and seems to fix at least #369164, #409758, and #410085.

Packages are available here. Of course, this is totally unsupported, and I have not done any careful testing. But it works for me until now, and I’l update this entry if I discover some problems. Also, I don’t plan to maintain this on the long term, so beware of security bugs.

Update : This breaks tetex (see #356079). Arg. I’ll have to use the experimental version…

Running Debian on your Linksys WRT54G* … sort of

I’m the happy owner of a Linksys WRT54GL. OpenWRT is nice, but … well. Debian is just nicer. And I couldn’t resist the idea of running Debian on this little MIPS system. Since there’s clearly not enough space available on the Linksys, I decided to install etch in a chroot, that I would mount using NFS.

Joey tried that already, the Debian wiki provides some information, but I use another technique.

First, on another system (an i386, I debootstrap’ed a mipsel etch, using --foreign. This tells debootstrap not to run the second stage:
debootstrap --arch mipsel --foreign etch /space/debian-mipsel

Then, I modified /etc/exports to allow the router to mount that chroot:

I mounted it on the router:
ipkg install kmod-nfs
insmod sunrpc
insmod lockd
insmod nfs
mount -t nfs star:/space/debian-mipsel /debian -o nolock
mount -t proc /dev/null /debian/proc

I set up some swap space on the NFS mount (mandatory, or debootstrap’s second stage will fail):
ipkg install losetup
ipkg install kmod-loop
ipkg install swap-utils
dd if=/dev/zero of=/debian/swapfile bs=1M count=100
losetup /dev/loop/0 /debian/swapfile
mkswap /dev/loop/0
swapon /dev/loop/0

I chrooted inside /debian, and ran debootstrap’s second stage:
chroot /debian /bin/bash
debootstrap/debootstrap --second-stage

When you are done playing, you can disable the swap space and umount everything:
swapoff /dev/loop/0
losetup -d /dev/loop/0
umount /debian/proc
sleep 1 # or umount /debian will fail
umount /debian

If you want to re-mount everything, all you need to do is:
insmod sunrpc
insmod lockd
insmod nfs
mount -t nfs star:/space/debian-mipsel /debian -o nolock
mount -t proc /dev/null /debian/proc
losetup /dev/loop/0 /debian/swapfile
swapon /dev/loop/0
chroot /debian /bin/bash

That first stage/second stage split in debootstrap is really cool: it’s an easy way to run Debian anywhere, only requiring to be able to chroot at some point.