Ny posting.

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-               <title>No hardcoded config on Debian Edu clients</title>
-               <link>http://people.skolelinux.org/pere/blog/No_hardcoded_config_on_Debian_Edu_clients.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/No_hardcoded_config_on_Debian_Edu_clients.html</guid>
-                <pubDate>Mon, 9 Aug 2010 20:15:00 +0200</pubDate>
+               <title>Some notes on Flash in Debian and Debian Edu</title>
+               <link>http://people.skolelinux.org/pere/blog/Some_notes_on_Flash_in_Debian_and_Debian_Edu.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Some_notes_on_Flash_in_Debian_and_Debian_Edu.html</guid>
+                <pubDate>Sat, 4 Sep 2010 10:10:00 +0200</pubDate>

                <description>
                <description>

-&lt;p&gt;As reported earlier, the last few days I have looked at how Debian
-Edu clients are configured, and tried to get rid of all hardcoded
-configuration settings on the clients.  I believe the work to be
-mostly done, and the clients seem to work just fine with dynamically
-generated configuration.&lt;/p&gt;
-
-&lt;p&gt;What is the point, you might ask?  The point is to allow a Debian
-Edu desktop to integrate into an existing network infrastructure
-without any manual configuration.&lt;/p&gt;
-
-&lt;p&gt;This is what happens when installing a Debian Edu client here at
-the University of Oslo using PXE.  With the PXE installation, I am
-asked for language (Norwegian Bokmål), locality (Norway) and keyboard
-layout (no-latin1), Debian Edu profile (Roaming Workstation), if I
-accept to reformat the hard drive (yes), if I want to submit info to
-popcon.debian.org (no) and root password (secret).  After answering
-these questions, the installer goes ahead and does its thing, and
-after around 50 minutes it is done.  I press enter to finish the
-installation, and the machine reboots into KDE.  When the machine is
-ready and kdm asks for login information, I enter my university
-username and password, am told by kdm that a local home directory has
-been created and that I must log in again, and finally log in with the
-same username and password to the KDE 4.4 desktop.  At no point during
-this process did it ask for university specific settings, and all the
-required configuration was dynamically detected using information
-fetched via DHCP and DNS.  The roaming workstation is now ready for
-use.&lt;/p&gt;
-
-&lt;p&gt;How was this done, you might wonder?  First of all, here is the
-list of things that need to be configured on the client to get it
-working properly out of the box:&lt;/p&gt;
-
-&lt;ul&gt;
-&lt;li&gt;IP address/netmask and DNS server.&lt;/li&gt;
-&lt;li&gt;Web proxy URL.&lt;/li&gt;
-&lt;li&gt;LDAP server for NSS directory information (user, group, etc).&lt;/li&gt;
-&lt;li&gt;Kerberos server for PAM password checking.&lt;/li&gt;
-&lt;li&gt;SMB mount point to access the network home directory. (*)&lt;/li&gt;
-&lt;li&gt;Central syslog server to send syslog messages to. (*)&lt;/li&gt;
-&lt;li&gt;Sitesummary collector URL to submit info to central server. (*)&lt;/li&gt;
-&lt;/ul&gt;
-
-&lt;p&gt;(Hm, did I forget anything?  Let me knew if I did.)&lt;/p&gt;
-
-&lt;p&gt;The points marked (*) are not required to be able to use the
-machine, but needed to provide central storage and allowing system
-administrators to track their machines.  Since yesterday, everything
-but the sitesummary collector URL is dynamically discovered at boot
-and installation time in the svn version of Debian Edu.&lt;/p&gt;
-
-&lt;p&gt;The IP and DNS setup is fetched during boot using DHCP as usual.
-When a DHCP update arrives, the proxy setup is updated by looking for
-http://wpat/wpad.dat and using the content of this WPAD file to
-configure the http and ftp proxy in /etc/environment and
-/etc/apt/apt.conf.  I decided to update the proxy setup using a DHCP
-hook to ensure that the client stops using the Debian Edu proxy when
-it is moved outside the Debian Edu network, and instead uses any local
-proxy present on the new network when it moves around.&lt;/p&gt;
-
-&lt;p&gt;The DNS names of the LDAP, Kerberos and syslog server and related
-configuration are generated using DNS information at boot.  First the
-installer looks for a host named ldap in the current DNS domain.  If
-not found, it looks for _ldap._tcp SRV records in DNS instead.  If an
-LDAP server is found, its root DSE entry is requested and the
-attributes namingContexts and defaultNamingContext are used to
-determine which LDAP base to use for NSS.  If there are several
-namingContexts attibutes and the defaultNamingContext is present, that
-LDAP subtree is used as the base.  If defaultNamingContext is missing,
-the subtrees listed as namingContexts are searched in sequence for any
-object with class posixAccount or posixGroup, and the first one with
-such an object is used as the LDAP base.  For Kerberos, a similar
-search is done by first looking for a host named kerberos, and then
-for the _kerberos._tcp SRV record.  I&#39;ve been unable to find a way to
-look up the Kerberos realm, so for this the upper case string of the
-current DNS domain is used.&lt;/p&gt;
-
-&lt;p&gt;For the syslog server, the hosts syslog and loghost are searched
-for, and the _syslog._udp SRV record is consulted if no such host is
-found.  This algorithm works for both Debian Edu and the University of
-Oslo.  A similar strategy would work for locating the sitesummary
-server, but have not been implemented yet.  I decided to fetch and
-save these settings during installation, to make sure moving to a
-different network does not change the set of users being allowed to
-log in nor the passwords required to log in.  Usernames and passwords
-will be cached by sssd when the user logs in on the Debian Edu
-network, and will not change as the laptop move around.  For a
-non-roaming machine, there is no caching, but given that it is
-supposed to stay in place it should not matter much.  Perhaps we
-should switch those to use sssd too?&lt;/p&gt;
-
-&lt;p&gt;The user&#39;s SMB mount point for the network home directory is
-located when the user logs in for the first time.  The LDAP server is
-consulted to look for the user&#39;s LDAP object and the sambaHomePath
-attribute is used if found.  If it isn&#39;t found, the home directory
-path fetched from NSS is used instead.  Assuming the path is of the
-form /site/server/directory/username, the second part is looked up in
-DNS and used to generate a SMB URL of the form
-smb://server.domain/username.  This algorithm works for both Debian
-edu and the University of Oslo.  Perhaps there are better attributes
-to use or a better algorithm that works for more sites, but this will
-do for now. :)&lt;/p&gt;
-
-&lt;p&gt;This work should make it easier to integrate the Debian Edu clients
-into any LDAP/Kerberos infrastructure, and make the current setup even
-more flexible than before.  I suspect it will also work for thin
-client servers, allowing one to easily set up LTSP and hook it into a
-existing network infrastructure, but I have not had time to test this
-yet.&lt;/p&gt;
-
-&lt;p&gt;If you want to help out with implementing these things for Debian
-Edu, please contact us on debian-edu@lists.debian.org.&lt;/p&gt;
-
-&lt;p&gt;Update 2010-08-09: Simon Farnsworth gave me a heads-up on how to
-detect Kerberos realm from DNS, by looking for _kerberos TXT entries
-before falling back to the upper case DNS domain name.  Will have to
-implement it for Debian Edu. :)&lt;/p&gt;
+&lt;p&gt;In the &lt;a href=&quot;http://popcon.debian.org/unknown/by_vote&quot;&gt;Debian
+popularity-contest numbers&lt;/a&gt;, the adobe-flashplugin package the
+second most popular used package that is missing in Debian.  The sixth
+most popular is flashplayer-mozilla.  This is a clear indication that
+working flash is important for Debian users.  Around 10 percent of the
+users submitting data to popcon.debian.org have this package
+installed.&lt;/p&gt;
+
+&lt;p&gt;In the report written by Lars Risan in August 2008
+(«&lt;a href=&quot;http://wiki.skolelinux.no/Dokumentasjon/Rapporter?action=AttachFile&amp;do=view&amp;target=Skolelinux_i_bruk_rapport_1.0.pdf&quot;&gt;Skolelinux
+i bruk – Rapport for Hurum kommune, Universitetet i Agder og
+stiftelsen SLX Debian Labs&lt;/a&gt;»), one of the most important problems
+schools experienced with &lt;a href=&quot;http://www.skolelinux.org/&quot;&gt;Debian
+Edu/Skolelinux&lt;/a&gt; was the lack of working Flash.  A lot of educational
+web sites require Flash to work, and lacking working Flash support in
+the web browser and the problems with installing it was perceived as a
+good reason to stay with Windows.&lt;/p&gt;
+
+&lt;p&gt;I once saw a funny and sad comment in a web forum, where Linux was
+said to be the retarded cousin that did not really understand
+everything you told him but could work fairly well.  This was a
+comment regarding the problems Linux have with proprietary formats and
+non-standard web pages, and is sad because it exposes a fairly common
+understanding of whose fault it is if web pages that only work in for
+example Internet Explorer 6 fail to work on Firefox, and funny because
+it explain very well how annoying it is for users when Linux
+distributions do not work with the documents they receive or the web
+pages they want to visit.&lt;/p&gt;
+
+&lt;p&gt;This is part of the reason why I believe it is important for Debian
+and Debian Edu to have a well working Flash implementation in the
+distribution, to get at least popular sites as Youtube and Google
+Video to working out of the box.  For Squeeze, Debian have the chance
+to include the latest version of Gnash that will make this happen, as
+the new release 0.8.8 was published a few weeks ago and is resting in
+unstable.  The new version work with more sites that version 0.8.7.
+The Gnash maintainers have asked for a freeze exception, but the
+release team have not had time to reply to it yet.  I hope they agree
+with me that Flash is important for the Debian desktop users, and thus
+accept the new package into Squeeze.&lt;/p&gt;

 </description>
        </item>
        
        <item>
 </description>
        </item>
        
        <item>

-               <title>Testing if a file system can be used for home directories...</title>
-               <link>http://people.skolelinux.org/pere/blog/Testing_if_a_file_system_can_be_used_for_home_directories___.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Testing_if_a_file_system_can_be_used_for_home_directories___.html</guid>
-                <pubDate>Sun, 8 Aug 2010 21:20:00 +0200</pubDate>
+               <title>My first perl GUI application - controlling a Spykee robot</title>
+               <link>http://people.skolelinux.org/pere/blog/My_first_perl_GUI_application___controlling_a_Spykee_robot.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/My_first_perl_GUI_application___controlling_a_Spykee_robot.html</guid>
+                <pubDate>Wed, 1 Sep 2010 21:00:00 +0200</pubDate>

                <description>
                <description>

-&lt;p&gt;A few years ago, I was involved in a project planning to use
-Windows file servers as home directory servers for Debian
-Edu/Skolelinux machines.  This was thought to be no problem, as the
-access would be through the SMB network file system protocol, and we
-knew other sites used SMB with unix and samba as the file server to
-mount home directories without any problems.  But, after months of
-struggling, we had to conclude that our goal was impossible.&lt;/p&gt;
-
-&lt;p&gt;The reason is simply that while SMB can be used for home
-directories when the file server is Samba running on Unix, this only
-work because of Samba have some extensions and the fact that the
-underlying file system is a unix file system.  When using a Windows
-file server, the underlying file system do not have POSIX semantics,
-and several programs will fail if the users home directory where they
-want to store their configuration lack POSIX semantics.&lt;/p&gt;
-
-&lt;p&gt;As part of this work, I wrote a small C program I want to share
-with you all, to replicate a few of the problematic applications (like
-OpenOffice.org and GCompris) and see if the file system was working as
-it should.  If you find yourself in spooky file system land, it might
-help you find your way out again.  This is the fs-test.c source:&lt;/p&gt;
+&lt;p&gt;This evening I made my first Perl GUI application.  The last few
+days I have worked on a Perl module for controlling my recently
+aquired Spykee robots, and the module is now getting complete enought
+that it is possible to use it to control the robot driving at least.
+It was now time to figure out how to use it to create some GUI to
+allow me to drive the robot around.  I picked PerlQt as I have had
+positive experiences with the Qt API before, and spent a few minutes
+browsing the web for examples.  Using Qt Designer seemed like a short
+cut, so I ended up writing the perl GUI using Qt Designer and
+compiling it into a perl program using the puic program from
+libqt-perl.  Nothing fancy yet, but it got buttons to connect and
+drive around.&lt;/p&gt;
+
+&lt;p&gt;The perl module I have written provide a object oriented API for
+controlling the robot.  Here is an small example on how to use it:&lt;/p&gt;
+
+&lt;p&gt;&lt;pre&gt;
+use Spykee;
+Spykee::discover(sub {$robot{$_[0]} = $_[1]});
+my $host = (keys %robot)[0];
+my $spykee = Spykee-&gt;new();
+$spykee-&gt;contact($host, &quot;admin&quot;, &quot;admin&quot;);
+$spykee-&gt;left();
+sleep 2;
+$spykee-&gt;right();
+sleep 2;
+$spykee-&gt;forward();
+sleep 2;
+$spykee-&gt;back();
+sleep 2;
+$spykee-&gt;stop();
+&lt;/pre&gt;&lt;/p&gt;
+
+&lt;p&gt;Thanks to the release of the source of the robot firmware, I could
+peek into the implementation at the other end to figure out how to
+implement the protocol used by the robot.  I&#39;ve implemented several of
+the commands the robot understand, but is still missing the camera
+support to make it possible to control the robot from remote.  First I
+want to implement support for uploading new firmware and configuring
+the wireless network, to make it possible to bootstrap a Spykee robot
+without the producers Windows and MacOSX software (I only have Linux,
+so I had to ask a friend to come over to get the robot testing
+going. :).&lt;/p&gt;
+
+&lt;p&gt;Will release the source to the public soon, but need to figure out
+where to make it available first.  I will add a link to 
+&lt;a href=&quot;http://wiki.nuug.no/grupper/robot/&quot;&gt;the NUUG wiki&lt;/a&gt; for
+those that want to check back later to find it.&lt;/p&gt;
+</description>
+       </item>
+       
+       <item>
+               <title>Forslag i stortinget om å stoppe elektronisk stemmegiving i Norge</title>
+               <link>http://people.skolelinux.org/pere/blog/Forslag_i_stortinget_om____stoppe_elektronisk_stemmegiving_i_Norge.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Forslag_i_stortinget_om____stoppe_elektronisk_stemmegiving_i_Norge.html</guid>
+                <pubDate>Tue, 31 Aug 2010 21:00:00 +0200</pubDate>
+               <description>
+&lt;p&gt;Ble tipset i dag om at et forslag om å stoppe forsøkene med
+elektronisk stemmegiving utenfor valglokaler er
+&lt;a href=&quot;http://www.stortinget.no/no/Saker-og-publikasjoner/Saker/Sak/?p=46616&quot;&gt;til
+behandling&lt;/a&gt; i Stortinget.
+&lt;a href=&quot;http://www.stortinget.no/Global/pdf/Representantforslag/2009-2010/dok8-200910-128.pdf&quot;&gt;Forslaget&lt;/a&gt;
+er fremmet av Erna Solberg, Michael Tetzschner og Trond Helleland.&lt;/p&gt;
+
+&lt;p&gt;Håper det får flertall.&lt;/p&gt;
+</description>
+       </item>
+       
+       <item>
+               <title>Broken hard link handling with sshfs</title>
+               <link>http://people.skolelinux.org/pere/blog/Broken_hard_link_handling_with_sshfs.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Broken_hard_link_handling_with_sshfs.html</guid>
+                <pubDate>Mon, 30 Aug 2010 19:30:00 +0200</pubDate>
+               <description>
+&lt;p&gt;Just got an email from Tobias Gruetzmacher as a followup on my
+&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Broken_umask_handling_with_sshfs.html&quot;&gt;previous
+post about sshfs&lt;/a&gt;.  He reported another problem with sshfs.  It
+fail to handle hard links properly.  A simple way to spot this is to
+look at the . and .. entries in the directory tree.  These should have
+a link count &gt;1, but on sshfs the count is 1.  I just tested to see
+what happen when trying to hardlink, and this fail as well:&lt;/p&gt;

 
 &lt;pre&gt;
 
 &lt;pre&gt;

-/*
- * Some tests to check the file system sematics.  Used to verify that
- * CIFS from a windows server do not work properly as a linux home
- * directory.
- * License: GPL v2 or later
- * 
- * needs libsqlite3-dev and build-essential installed
- * compile with: gcc -Wall -lsqlite3 -DTEST_SQLITE fs-test.c -o fs-test
-*/
-
-#define _FILE_OFFSET_BITS 64
-#define _LARGEFILE_SOURCE 1
-#define _LARGEFILE64_SOURCE 1
-
-#define _GNU_SOURCE /* for asprintf() */
+% ln foo bar
+ln: creating hard link `bar&#39; =&gt; `foo&#39;: Function not implemented
+%
+&lt;/pre&gt;

 
 

-#include &amp;lt;errno.h&gt;
-#include &amp;lt;fcntl.h&gt;
-#include &amp;lt;stdio.h&gt;
-#include &amp;lt;string.h&gt;
-#include &amp;lt;stdlib.h&gt;
-#include &amp;lt;sys/file.h&gt;
-#include &amp;lt;sys/stat.h&gt;
-#include &amp;lt;sys/types.h&gt;
-#include &amp;lt;unistd.h&gt;
+&lt;p&gt;I have not yet found time to implement a test for this in my file
+system test code, but believe having working hard links is useful to
+avoid surprised unix programs.  Not as useful as working file locking
+and symlinks, which are required to get a working desktop, but useful
+nevertheless. :)&lt;/p&gt;

 
 

-#ifdef TEST_SQLITE
-/*
- * Test sqlite open, as done by gcompris require the libsqlite3-dev
- * package and linking with -lsqlite3.  A more low level test is
- * below.
- * See also &amp;lt;URL: http://www.sqlite.org./faq.html#q5 &gt;.
- */
-#include &amp;lt;sqlite3.h&gt;
-#define CREATE_TABLE_USERS                                              \
-  &quot;CREATE TABLE users (user_id INT UNIQUE, login TEXT, lastname TEXT, firstname TEXT, birthdate TEXT, class_id INT ); &quot;
-int test_sqlite_open(void) {
-  char *zErrMsg;
-  char *name = &quot;testsqlite.db&quot;;
-  sqlite3 *db=NULL;
-  unlink(name);
-  int rc = sqlite3_open(name, &amp;db);
-  if( rc ){
-    printf(&quot;error: sqlite open of %s failed: %s\n&quot;, name, sqlite3_errmsg(db));
-    sqlite3_close(db);
-    return -1;
-  }
+&lt;p&gt;The latest version of the file system test code is available via
+git from
+&lt;a href=&quot;http://github.com/gebi/fs-test&quot;&gt;http://github.com/gebi/fs-test&lt;/a&gt;&lt;/p&gt;
+</description>
+       </item>
+       
+       <item>
+               <title>Sikkerhetsteateret på flyplassene fortsetter</title>
+               <link>http://people.skolelinux.org/pere/blog/Sikkerhetsteateret_p___flyplassene_fortsetter.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Sikkerhetsteateret_p___flyplassene_fortsetter.html</guid>
+                <pubDate>Sat, 28 Aug 2010 10:40:00 +0200</pubDate>
+               <description>
+&lt;p&gt;Jeg skrev for et halvt år siden hvordan
+&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Sikkerhet__teater__og_hvordan_gj__re_verden_sikrere.html&quot;&gt;samfunnet
+kaster bort ressurser på sikkerhetstiltak som ikke fungerer&lt;/a&gt;.  Kom
+nettopp over en
+&lt;a href=&quot;http://www.askthepilot.com/essays-and-stories/terrorism-tweezers-and-terminal-madness-an-essay-on-security/&quot;&gt;historie
+fra en pilot fra USA&lt;/a&gt; som kommenterer det samme.  Jeg mistenker det
+kun er uvitenhet og autoritetstro som gjør at så få protesterer.  Har
+veldig sans for piloten omtalt i &lt;a
+href=&quot;http://www.aftenposten.no/nyheter/iriks/article2057501.ece&quot;&gt;Aftenposten&lt;/a&gt; 2007-10-23,
+og skulle ønske flere rettet oppmerksomhet mot problemet.  Det gir
+ikke meg trygghetsfølelse på flyplassene når jeg ser at
+flyplassadministrasjonen kaster bort folk, penger og tid på tull i
+stedet for ting som bidrar til reell økning av sikkerheten.  Det
+forteller meg jo at vurderingsevnen til de som burde bidra til økt
+sikkerhet er svært sviktende, noe som ikke taler godt for de andre
+tiltakene.&lt;/p&gt;
+
+&lt;p&gt;Mon tro hva som skjer hvis det fantes en enkel brosjyre å skrive ut
+fra Internet som forklarte hva som er galt med sikkerhetsopplegget på
+flyplassene, og folk skrev ut og la en bunke på flyplassene når de
+passerte.  Kanskje det ville fått flere til å få øynene opp for
+problemet.&lt;/p&gt;
+
+&lt;p&gt;Personlig synes jeg flyopplevelsen er blitt så avskyelig at jeg
+forsøker å klare meg med tog, bil og båt for å slippe ubehaget.  Det
+er dog noe vanskelig i det langstrakte Norge og for å kunne besøke de
+delene av verden jeg ønsker å nå.  Mistenker at flere har det slik, og
+at dette går ut over inntjeningen til flyselskapene.  Det er antagelig
+en god ting sett fra et miljøperspektiv, men det er en annen sak.&lt;/p&gt;
+</description>
+       </item>
+       
+       <item>
+               <title>Skolelinux i Osloskolen</title>
+               <link>http://people.skolelinux.org/pere/blog/Skolelinux_i_Osloskolen.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Skolelinux_i_Osloskolen.html</guid>
+                <pubDate>Thu, 26 Aug 2010 22:25:00 +0200</pubDate>
+               <description>
+&lt;p&gt;Denne høsten skal endelig alle Osloskolene få mulighet til å bruke
+&lt;a href=&quot;http://www.skolelinux.org/&quot;&gt;Skolelinux&lt;/a&gt;.  Ny IT-løsning
+har vært rullet ut i noen måneder nå, og så vidt jeg fikk vite før
+sommeren skulle alle skoler ha nytt opplegg på plass før oppstart nå i
+høst.  På alle skolene skal en kunne velge ved installasjon om en skal
+ha Windows eller Skolelinux på maskinene, og en kan i tillegg
+PXE-boote maskinene over nett som tynne klienter eller diskløse
+arbeidsstasjoner. Jeg er spent på hvor mange skoler som velger å ta i
+bruk Skolelinux, og gleder meg til å se hvordan dette utvikler seg.
+Løsningen leveres av
+&lt;a href=&quot;http://www.logica.no/&quot;&gt;Logica&lt;/a&gt; med
+&lt;a href=&quot;http://www.slxdrift.no/&quot;&gt;Skolelinux Drift AS&lt;/a&gt; som
+underleverandør, og jeg har vært involvert i utviklingen av løsningen
+via Skolelinux Drift AS siden prosjektet starter.  Jeg synes det er
+fantastisk at Skolelinux er kommet så langt siden vi startet i 2001 at
+alle elevene i Osloskolene nå skal få mulighet til å bruke
+løsningen.  Jeg håper de vil sette pris på alle de
+&lt;a href=&quot;http://www.skolelinux.no/linux-signpost/&quot;&gt;fantastiske
+brukerprogrammene&lt;/a&gt; som er tilgjengelig i Skolelinux.&lt;/p&gt;
+</description>
+       </item>
+       
+       <item>
+               <title>Broken umask handling with sshfs</title>
+               <link>http://people.skolelinux.org/pere/blog/Broken_umask_handling_with_sshfs.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Broken_umask_handling_with_sshfs.html</guid>
+                <pubDate>Thu, 26 Aug 2010 13:30:00 +0200</pubDate>
+               <description>
+&lt;p&gt;My file system sematics program
+&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Testing_if_a_file_system_can_be_used_for_home_directories___.html&quot;&gt;presented
+a few days ago&lt;/a&gt; is very useful to verify that a file system can
+work as a unix home directory,and today I had to extend it a bit.  I&#39;m
+looking into alternatives for home directory access here at the
+University of Oslo, and one of the options is sshfs.  My friend
+Finn-Arne mentioned a while back that they had used sshfs with Debian
+Edu, but stopped because of problems.  I asked today what the problems
+where, and he mentioned that sshfs failed to handle umask properly.
+Trying to detect the problem I wrote this addition to my fs testing
+script:&lt;/p&gt;

 
 

-  /* create tables */
-  rc = sqlite3_exec(db,CREATE_TABLE_USERS, NULL,  0, &amp;zErrMsg);
-  if( rc != SQLITE_OK ){
-    printf(&quot;error: sqlite table create failed: %s\n&quot;, zErrMsg);
-    sqlite3_close(db);
-    return -1;
+&lt;pre&gt;
+mode_t touch_get_mode(const char *name, mode_t mode) {
+  mode_t retval = 0;
+  int fd = open(name, O_RDWR|O_CREAT|O_LARGEFILE, mode);
+  if (-1 != fd) {
+    unlink(name);
+    struct stat statbuf;
+    if (-1 != fstat(fd, &amp;statbuf)) {
+      retval = statbuf.st_mode &amp; 0x1ff;
+    }
+    close(fd);

   }
   }

-  printf(&quot;info: sqlite worked\n&quot;);
-  sqlite3_close(db);
-  return 0;
+  return retval;

 }
 }

-#endif /* TEST_SQLITE */
-
-/*
- * Demonstrate locking issue found in gcompris using sqlite3.  This
- * work with ext3, but not with cifs server on Windows 2003.  This is
- * done in the sqlite3 library.
- * See also
- * &amp;lt;URL:http://www.cygwin.com/ml/cygwin/2001-08/msg00854.html&gt; and the
- * POSIX specification
- * &amp;lt;URL:http://www.opengroup.org/onlinepubs/009695399/functions/fcntl.html&gt;.
- */
-int test_gcompris_locking(void) {
-  struct flock fl;
-  char *name = &quot;testsqlite.db&quot;;
-  unlink(name);
-  int fd = open(name, O_RDWR|O_CREAT|O_LARGEFILE, 0644);
-  printf(&quot;info: testing fcntl locking\n&quot;);
-
-  fl.l_whence = SEEK_SET;
-  fl.l_pid    = getpid();
-  printf(&quot;  Read-locking 1 byte from 1073741824&quot;);
-  fl.l_start  = 1073741824;
-  fl.l_len    = 1;
-  fl.l_type   = F_RDLCK;
-  if (0 != fcntl(fd, F_SETLK, &amp;fl) ) printf(&quot; - error!\n&quot;); else printf(&quot;\n&quot;);
-
-  printf(&quot;  Read-locking 510 byte from 1073741826&quot;);
-  fl.l_start  = 1073741826;
-  fl.l_len    = 510;
-  fl.l_type   = F_RDLCK;
-  if (0 != fcntl(fd, F_SETLK, &amp;fl) ) printf(&quot; - error!\n&quot;); else printf(&quot;\n&quot;);
-
-  printf(&quot;  Unlocking 1 byte from 1073741824&quot;);
-  fl.l_start  = 1073741824;
-  fl.l_len    = 1;
-  fl.l_type   = F_UNLCK;
-  if (0 != fcntl(fd, F_SETLK, &amp;fl) ) printf(&quot; - error!\n&quot;); else printf(&quot;\n&quot;);

 
 

-  printf(&quot;  Write-locking 1 byte from 1073741824&quot;);
-  fl.l_start  = 1073741824;
-  fl.l_len    = 1;
-  fl.l_type   = F_WRLCK;
-  if (0 != fcntl(fd, F_SETLK, &amp;fl) ) printf(&quot; - error!\n&quot;); else printf(&quot;\n&quot;);
+/* Try to detect problem discovered using sshfs */
+int test_umask(void) {
+  printf(&quot;info: testing umask effect on file creation\n&quot;);

 
 

-  printf(&quot;  Write-locking 510 byte from 1073741826&quot;);
-  fl.l_start  = 1073741826;
-  fl.l_len    = 510;
-  if (0 != fcntl(fd, F_SETLK, &amp;fl) ) printf(&quot; - error!\n&quot;); else printf(&quot;\n&quot;);
-
-  printf(&quot;  Unlocking 2 byte from 1073741824&quot;);
-  fl.l_start  = 1073741824;
-  fl.l_len    = 2;
-  fl.l_type   = F_UNLCK;
-  if (0 != fcntl(fd, F_SETLK, &amp;fl) ) printf(&quot; - error!\n&quot;); else printf(&quot;\n&quot;);
-
-  close(fd);
-  return 0;
-}
-
-/*
- * Test if permissions of freshly created directories allow entries
- * below them.  This was a problem with OpenOffice.org and gcompris.
- * Mounting with option &#39;sync&#39; seem to solve this problem while
- * slowing down file operations.
- */
-int test_subdirectory_creation(void) {
-#define LEVELS 5
-  char *path = strdup(&quot;test&quot;);
-  char *dirs[LEVELS];
-  int level;
-  printf(&quot;info: testing subdirectory creation\n&quot;);
-  for (level = 0; level &amp;lt; LEVELS; level++) {
-    char *newpath = NULL;
-    if (-1 == mkdir(path, 0777)) {
-      printf(&quot;  error: Unable to create directory &#39;%s&#39;: %s\n&quot;,
-            path, strerror(errno));
-      break;
-    }
-    asprintf(&amp;newpath, &quot;%s/%s&quot;, path, &quot;test&quot;);
-    free(path);
-    path = newpath;
+  mode_t orig_umask = umask(000);
+  mode_t newmode;
+  if (0666 != (newmode = touch_get_mode(&quot;foobar&quot;, 0666))) {
+    printf(&quot;  error: Wrong file mode %o when creating using mode 666 and umask 000\n&quot;,
+           newmode);
+  }
+  umask(007);
+  if (0660 != (newmode = touch_get_mode(&quot;foobar&quot;, 0666))) {
+    printf(&quot;  error: Wrong file mode %o when creating using mode 666 and umask 007\n&quot;,
+           newmode);

   }
   }

-  return 0;
-}

 
 

-/*
- * Test if symlinks can be created.  This was a problem detected with
- * KDE.
- */
-int test_symlinks(void) {
-  printf(&quot;info: testing symlink creation\n&quot;);
-  unlink(&quot;symlink&quot;);
-  if (-1 == symlink(&quot;file&quot;, &quot;symlink&quot;))
-    printf(&quot;  error: Unable to create symlink\n&quot;);
+  umask (orig_umask);

   return 0;
 }
 
 int main(int argc, char **argv) {
   return 0;
 }
 
 int main(int argc, char **argv) {

-  printf(&quot;Testing POSIX/Unix sematics on file system\n&quot;);
-  test_symlinks();
-  test_subdirectory_creation();
-#ifdef TEST_SQLITE
-  test_sqlite_open();
-#endif /* TEST_SQLITE */
-  test_gcompris_locking();
+  [...]
+  test_umask();

   return 0;
 }
 &lt;/pre&gt;
 
   return 0;
 }
 &lt;/pre&gt;
 

-&lt;p&gt;When everything is working, it should print something like
-this:&lt;/p&gt;
+&lt;p&gt;Sure enough.  On NFS to a netapp, I get this result:&lt;/p&gt;

 
 &lt;pre&gt;
 Testing POSIX/Unix sematics on file system
 info: testing symlink creation
 info: testing subdirectory creation
 
 &lt;pre&gt;
 Testing POSIX/Unix sematics on file system
 info: testing symlink creation
 info: testing subdirectory creation

-info: sqlite worked

 info: testing fcntl locking
   Read-locking 1 byte from 1073741824
   Read-locking 510 byte from 1073741826
 info: testing fcntl locking
   Read-locking 1 byte from 1073741824
   Read-locking 510 byte from 1073741826


@@ -343,716 +300,163 @@ info: testing fcntl locking
   Write-locking 1 byte from 1073741824
   Write-locking 510 byte from 1073741826
   Unlocking 2 byte from 1073741824
   Write-locking 1 byte from 1073741824
   Write-locking 510 byte from 1073741826
   Unlocking 2 byte from 1073741824

+info: testing umask effect on file creation

 &lt;/pre&gt;
 
 &lt;/pre&gt;
 

-&lt;p&gt;I do not remember the exact details of the problems we saw, but one
-of them was with locking, where if I remember correctly, POSIX allow a
-read-only lock to be upgraded to a read-write lock without unlocking
-the read-only lock (while Windows do not).  Another was a bug in the
-CIFS/SMB client implementation in the Linux kernel where directory
-meta information would be wrong for a fraction of a second, making
-OpenOffice.org fail to create its deep directory tree because it was
-not allowed to create files in its freshly created directory.&lt;/p&gt;
-
-&lt;p&gt;Anyway, here is a nice tool for your tool box, might you never need
-it. :)&lt;/p&gt;
-</description>
-       </item>
-       
-       <item>
-               <title>Autodetecting Client setup for roaming workstations in Debian Edu</title>
-               <link>http://people.skolelinux.org/pere/blog/Autodetecting_Client_setup_for_roaming_workstations_in_Debian_Edu.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Autodetecting_Client_setup_for_roaming_workstations_in_Debian_Edu.html</guid>
-                <pubDate>Sat, 7 Aug 2010 14:45:00 +0200</pubDate>
-               <description>
-&lt;p&gt;A few days ago, I
-&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Debian_Edu_roaming_workstation___at_the_university_of_Oslo.html&quot;&gt;tried
-to install&lt;/a&gt; a Roaming workation profile from Debian Edu/Squeeze
-while on the university network here at the University of Oslo, and
-noticed how much had to change to get it operational using the
-university infrastructure.  It was fairly easy, but it occured to me
-that Debian Edu would improve a lot if I could get the client to
-connect without any changes at all, and thus let the client configure
-itself during installation and first boot to use the infrastructure
-around it.  Now I am a huge step further along that road.&lt;/p&gt;
-
-&lt;p&gt;With our current squeeze-test packages, I can select the roaming
-workstation profile and get a working laptop connecting to the
-university LDAP server for user and group and our active directory
-servers for Kerberos authentication.  All this without any
-configuration at all during installation.  My users home directory got
-a bookmark in the KDE menu to mount it via SMB, with the correct URL.
-In short, openldap and sssd is correctly configured.  In addition to
-this, the client look for http://wpad/wpad.dat to configure a web
-proxy, and when it fail to find it no proxy settings are stored in
-/etc/environment and /etc/apt/apt.conf.  Iceweasel and KDE is
-configured to look for the same wpad configuration and also do not use
-a proxy when at the university network.  If the machine is moved to a
-network with such wpad setup, it would automatically use it when DHCP
-gave it a IP address.&lt;/p&gt;
+&lt;p&gt;When mounting the same directory using sshfs, I get this
+result:&lt;/p&gt;

 
 

-&lt;p&gt;The LDAP server is located using DNS, by first looking for the DNS
-entry ldap.$domain.  If this do not exist, it look for the
-_ldap._tcp.$domain SRV records and use the first one as the LDAP
-server.  Next, it connects to the LDAP server and search all
-namingContexts entries for posixAccount or posixGroup objects, and
-pick the first one as the LDAP base.  For Kerberos, a similar
-algorithm is used to locate the LDAP server, and the realm is the
-uppercase version of $domain.&lt;/p&gt;
+&lt;pre&gt;
+Testing POSIX/Unix sematics on file system
+info: testing symlink creation
+info: testing subdirectory creation
+info: testing fcntl locking
+  Read-locking 1 byte from 1073741824
+  Read-locking 510 byte from 1073741826
+  Unlocking 1 byte from 1073741824
+  Write-locking 1 byte from 1073741824
+  Write-locking 510 byte from 1073741826
+  Unlocking 2 byte from 1073741824
+info: testing umask effect on file creation
+  error: Wrong file mode 644 when creating using mode 666 and umask 000
+  error: Wrong file mode 640 when creating using mode 666 and umask 007
+&lt;/pre&gt;

 
 

-&lt;p&gt;So, what is not working, you might ask.  SMB mounting my home
-directory do not work.  No idea why, but suspected the incorrect
-Kerberos settings in /etc/krb5.conf and /etc/samba/smb.conf might be
-the cause.  These are not properly configured during installation, and
-had to be hand-edited to get the correct Kerberos realm and server,
-but SMB mounting still do not work. :(&lt;/p&gt;
+&lt;p&gt;So, I can conclude that sshfs is better than smb to a Netapp or a
+Windows server, but not good enough to be used as a home
+directory.&lt;/p&gt;

 
 

-&lt;p&gt;With this automatic configuration in place, I expect a Debian Edu
-roaming profile installation would be able to automatically detect and
-connect to any site using LDAP and Kerberos for NSS directory and PAM
-authentication.  It should also work out of the box in a Active
-Directory environment providing posixAccount and posixGroup objects
-with UID and GID values.&lt;/p&gt;
+&lt;p&gt;Update 2010-08-26: Reported the issue in
+&lt;a href=&quot;http://bugs.debian.org/594498&quot;&gt;BTS report #594498&lt;/a&gt;&lt;/p&gt;

 
 

-&lt;p&gt;If you want to help out with implementing these things for Debian
-Edu, please contact us on debian-edu@lists.debian.org.&lt;/p&gt;
+&lt;p&gt;Update 2010-08-27: Michael Gebetsroither report that he found the
+script so useful that he created a GIT repository and stored it in
+&lt;a href=&quot;http://github.com/gebi/fs-test&quot;&gt;http://github.com/gebi/fs-test&lt;/a&gt;.&lt;/p&gt;

 </description>
        </item>
        
        <item>
 </description>
        </item>
        
        <item>

-               <title>Debian Edu roaming workstation - at the university of Oslo</title>
-               <link>http://people.skolelinux.org/pere/blog/Debian_Edu_roaming_workstation___at_the_university_of_Oslo.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Debian_Edu_roaming_workstation___at_the_university_of_Oslo.html</guid>
-                <pubDate>Tue, 3 Aug 2010 23:30:00 +0200</pubDate>
+               <title>Elektronisk stemmegiving er ikke til å stole på - heller ikke i Norge</title>
+               <link>http://people.skolelinux.org/pere/blog/Elektronisk_stemmegiving_er_ikke_til____stole_p_____heller_ikke_i_Norge.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Elektronisk_stemmegiving_er_ikke_til____stole_p_____heller_ikke_i_Norge.html</guid>
+                <pubDate>Mon, 23 Aug 2010 19:30:00 +0200</pubDate>

                <description>
                <description>

-&lt;p&gt;The new roaming workstation profile in Debian Edu/Squeeze is fairly
-similar to the laptop setup am I working on using Ubuntu for the
-University of Oslo, and just for the heck of it, I tested today how
-hard it would be to integrate that profile into the university
-infrastructure.  In this case, it is the university LDAP server,
-Active Directory Kerberos server and SMB mounting from the Netapp file
-servers.&lt;/p&gt;
-
-&lt;p&gt;I was pleasantly surprised that the only three files needed to be
-changed (/etc/sssd/sssd.conf, /etc/ldap.conf and
-/etc/mklocaluser.d/20-debian-edu-config) and one file had to be added
-(/usr/share/perl5/Debian/Edu_Local.pm), to get the client working.
-Most of the changes were to get the client to use the university LDAP
-for NSS and Kerberos server for PAM, but one was to change a hard
-coded DNS domain name in the mklocaluser hook from .intern to
-.uio.no.&lt;/p&gt;
-
-&lt;p&gt;This testing was so encouraging, that I went ahead and adjusted the
-Debian Edu scripts and setup in subversion to centralise the roaming
-workstation setup a bit more and avoid the hardcoded DNS domain name,
-so that when I test this tomorrow, I expect to get away with modifying
-only /etc/sssd/sssd.conf and /etc/ldap.conf to get it to use the
-university servers.&lt;/p&gt;
-
-&lt;p&gt;My goal is to get the clients to have no hardcoded settings and
-fetch all their initial setup during installation and first boot, to
-allow them to be inserted also into environments where the default
-setup in Debian Edu has been changed or as with the university, where
-the environment is different but provides the protocols Debian Edu
-uses.&lt;/p&gt;
+&lt;p&gt;I Norge pågår en prosess for å
+&lt;a href=&quot;http://www.e-valg.dep.no/&quot;&gt;innføre elektronisk
+stemmegiving&lt;/a&gt; ved kommune- og stortingsvalg.  Dette skal
+introduseres i 2011.  Det er all grunn til å tro at valg i Norge ikke
+vil være til å stole på hvis dette blir gjennomført.  Da det hele var
+oppe til høring i 2006 forfattet jeg
+&lt;a href=&quot;http://www.nuug.no/dokumenter/valg-horing-2006-09.pdf&quot;&gt;en
+høringsuttalelse fra NUUG&lt;/a&gt; (og EFN som hengte seg på) som skisserte
+hvilke punkter som må oppfylles for at en skal kunne stole på et valg,
+og elektronisk stemmegiving mangler flere av disse.  Elektronisk
+stemmegiving er for alle praktiske formål å putte ens stemme i en sort
+boks under andres kontroll, og satse på at de som har kontroll med
+boksen er til å stole på - uten at en har mulighet til å verifisere
+dette selv.  Det er ikke slik en gjennomfører demokratiske valg.&lt;/p&gt;
+
+&lt;p&gt;Da problemet er fundamentalt med hvordan elektronisk stemmegiving
+må fungere for at også ikke-krypografer skal kunne delta, har det vært
+mange rapporter om hvordan elektronisk stemmegiving har sviktet i land
+etter land.  En
+&lt;a href=&quot;http://wiki.nuug.no/uttalelser/2006-elektronisk-stemmegiving&quot;&gt;liten
+samling referanser&lt;/a&gt; finnes på NUUGs wiki.  Den siste er fra India,
+der valgkomisjonen har valgt
+&lt;a href=&quot;http://www.freedom-to-tinker.com/blog/jhalderm/electronic-voting-researcher-arrested-over-anonymous-source&quot;&gt;å
+pusse politiet på en forsker&lt;/a&gt; som har dokumentert svakheter i
+valgsystemet.&lt;/p&gt;
+
+&lt;p&gt;Her i Norge har en valgt en annen tilnærming, der en forsøker seg
+med teknobabbel for å få befolkningen til å tro at dette skal bli
+sikkert.  Husk, elektronisk stemmegiving underminerer de demokratiske
+valgene i Norge, og bør ikke innføres.&lt;/p&gt;
+
+&lt;p&gt;Den offentlige diskusjonen blir litt vanskelig av at media har
+valgt å kalle dette &quot;evalg&quot;, som kan sies å både gjelde elektronisk
+opptelling av valget som Norge har gjort siden 60-tallet og som er en
+svært god ide, og elektronisk opptelling som er en svært dårlig ide.
+Diskusjonen gir ikke mening hvis en skal diskutere om en er for eller
+mot &quot;evalg&quot;, og jeg forsøker derfor å være klar på at jeg snakker om
+elektronisk stemmegiving og unngå begrepet &quot;evalg&quot;.&lt;/p&gt;

 </description>
        </item>
        
        <item>
 </description>
        </item>
        
        <item>

-               <title>Circular package dependencies harms apt recovery</title>
-               <link>http://people.skolelinux.org/pere/blog/Circular_package_dependencies_harms_apt_recovery.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Circular_package_dependencies_harms_apt_recovery.html</guid>
-                <pubDate>Tue, 27 Jul 2010 23:50:00 +0200</pubDate>
+               <title>Robot, reis deg...</title>
+               <link>http://people.skolelinux.org/pere/blog/Robot__reis_deg___.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Robot__reis_deg___.html</guid>
+                <pubDate>Sat, 21 Aug 2010 22:10:00 +0200</pubDate>

                <description>
                <description>

-&lt;p&gt;I discovered this while doing
-&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Automatic_upgrade_testing_from_Lenny_to_Squeeze.html&quot;&gt;automated
-testing of upgrades from Debian Lenny to Squeeze&lt;/a&gt;.  A few packages
-in Debian still got circular dependencies, and it is often claimed
-that apt and aptitude should be able to handle this just fine, but
-some times these dependency loops causes apt to fail.&lt;/p&gt;
-
-&lt;p&gt;An example is from todays
-&lt;a href=&quot;http://people.skolelinux.org/~pere/debian-upgrade-testing//test-20100727-lenny-squeeze-kde-aptitude.txt&quot;&gt;upgrade
-of KDE using aptitude&lt;/a&gt;.  In it, a bug in kdebase-workspace-data
-causes perl-modules to fail to upgrade.  The cause is simple.  If a
-package fail to unpack, then only part of packages with the circular
-dependency might end up being unpacked when unpacking aborts, and the
-ones already unpacked will fail to configure in the recovery phase
-because its dependencies are unavailable.&lt;/p&gt;
-
-&lt;p&gt;In this log, the problem manifest itself with this error:&lt;/p&gt;
-
-&lt;blockquote&gt;&lt;pre&gt;
-dpkg: dependency problems prevent configuration of perl-modules:
- perl-modules depends on perl (&gt;= 5.10.1-1); however:
-  Version of perl on system is 5.10.0-19lenny2.
-dpkg: error processing perl-modules (--configure):
- dependency problems - leaving unconfigured
-&lt;/pre&gt;&lt;/blockquote&gt;
-
-&lt;p&gt;The perl/perl-modules circular dependency is already
-&lt;a href=&quot;http://bugs.debian.org/527917&quot;&gt;reported as a bug&lt;/a&gt;, and will
-hopefully be solved as soon as possible, but it is not the only one,
-and each one of these loops in the dependency tree can cause similar
-failures.  Of course, they only occur when there are bugs in other
-packages causing the unpacking to fail, but it is rather nasty when
-the failure of one package causes the problem to become worse because
-of dependency loops.&lt;/p&gt;
-
-&lt;p&gt;Thanks to
-&lt;a href=&quot;http://lists.debian.org/debian-devel/2010/06/msg00116.html&quot;&gt;the
-tireless effort by Bill Allombert&lt;/a&gt;, the number of circular
-dependencies
-&lt;a href=&quot;http://debian.semistable.com/debgraph.out.html&quot;&gt;left in Debian
-is dropping&lt;/a&gt;, and perhaps it will reach zero one day. :)&lt;/p&gt;
-
-&lt;p&gt;Todays testing also exposed a bug in
-&lt;a href=&quot;http://bugs.debian.org/590605&quot;&gt;update-notifier&lt;/a&gt; and
-&lt;a href=&quot;http://bugs.debian.org/590604&quot;&gt;different behaviour&lt;/a&gt; between
-apt-get and aptitude, the latter possibly caused by some circular
-dependency.  Reported both to BTS to try to get someone to look at
-it.&lt;/p&gt;
+&lt;p&gt;I dag fikk jeg endelig tittet litt på mine nyinnkjøpte roboter, og
+har brukt noen timer til å google etter interessante referanser og
+aktuell kildekode for bruk på Linux.  Det mest lovende så langt er
+&lt;a href=&quot;http://ispykee.toyz.org/&quot;&gt;ispykee&lt;/a&gt;, som har en
+BSD-lisensiert linux-daemon som står som mellomledd mellom roboter på
+lokalnettet og en sentral tjeneste der en iPhone kan koble seg opp for
+å fjernstyre roboten.  Linux-daemonen implementerer deler av
+protokollen som roboten forstår.  Etter å ha knotet litt med å oppnå
+kontakt med roboten (den oppretter et eget ad-hoc wifi-nett, så jeg
+måtte gå av mitt vanlige nett for å få kontakt), og kommet frem til at
+den lytter på IP-port 9000 og 9001, gikk jeg i gang med å finne ut
+hvordan jeg kunne snakke med roboten vha. disse portene.  Robotbiten
+av protokollen er publisert av produsenten med GPL-lisens, slik at det
+er mulig å se hvordan protokollen fungerer.  Det finnes en java-klient
+for Android som så ganske snasen ut, men fant ingen kildekode for
+denne.  Derimot hadde iphone-løsningen kildekode, så jeg tok
+utgangspunkt i den.&lt;/p&gt;
+
+&lt;p&gt;Daemonen ville i utgangspunktet forsøke å kontakte den sentrale
+tjenesten som iphone-programmet kobler seg til.  Jeg skrev dette om
+til i stedet å sette opp en nettverkstjeneste på min lokale maskin,
+som jeg kan koble meg opp til med telnet og gi kommandoer til roboten
+(act, forward, right, left, etc).  Det involverte i praksis å bytte ut
+socket()/connect() med socket()/bind()/listen()/accept() for å gjøre
+klienten om til en tjener.&lt;/p&gt;
+
+&lt;p&gt;Mens jeg har forsøkt å få roboten til å bevege seg har min samboer
+skrudd sammen resten av roboten for å få montert kamera og plastpynten
+(armer, plastfiber for lys).  Nå er det hele montert, og roboten er
+klar til bruk.  Må få flyttet den over til mitt vanlige trådløsnett
+før det blir praktisk, men de bitene av protokollen er ikke
+implementert i ispykee-daemonen, så der må jeg enten få tak i en mac
+eller en windows-maskin, eller implementere det selv.&lt;/p&gt;
+
+&lt;p&gt;Vi var tre som kjøpte slike roboter, og vi har blitt enige om å
+samle notater og referanser på &lt;a
+href=&quot;http://wiki.nuug.no/grupper/robot/&quot;&gt;NUUGs wiki&lt;/a&gt;.  Ta en titt
+der hvis du er nysgjerrig.&lt;/p&gt;

 </description>
        </item>
        
        <item>
 </description>
        </item>
        
        <item>

-               <title>First Debian Edu test release (alpha0) based on Squeeze is released</title>
-               <link>http://people.skolelinux.org/pere/blog/First_Debian_Edu_test_release__alpha0__based_on_Squeeze_is_released.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/First_Debian_Edu_test_release__alpha0__based_on_Squeeze_is_released.html</guid>
-                <pubDate>Tue, 27 Jul 2010 17:45:00 +0200</pubDate>
+               <title>2 Spykee-roboter i hus, nå skal det lekes</title>
+               <link>http://people.skolelinux.org/pere/blog/2_Spykee_roboter_i_hus__n___skal_det_lekes.html</link>
+               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/2_Spykee_roboter_i_hus__n___skal_det_lekes.html</guid>
+                <pubDate>Wed, 18 Aug 2010 13:30:00 +0200</pubDate>

                <description>
                <description>

-&lt;p&gt;I just posted this announcement culminating several months of work
-with the next Debian Edu release.  Not nearly done, but one major step
-completed.&lt;/p&gt;
-
-&lt;blockquote&gt;
-&lt;p&gt;This is the first test release based on Squeeze. The focus of this
-release is to test the user application selection. To have a look,
-install the standalone profile and let the developers know if the set
-of installed packages i.e. applications should be modified. If some
-user application is missing, or if there are some applications that no
-longer make sense to be included in Debian Edu, please let us know.
-Also, if a useful application is missing the translation for your
-language of choice, please let us know too.&lt;/p&gt;
-
-&lt;p&gt;In addition, feedback and help to polish the desktop (menus,
-artwork, starters, etc.) is appreciated. We would like to ship a nice
-and handy KDE4 desktop targeted for schools out of the box.&lt;/p&gt;
-
-&lt;p&gt;The other profiles should be installable, but there is a lot more
-work left to be done before they are ready, so do not expect to
-much.&lt;/p&gt;
-
-&lt;p&gt;Changes compared to the lenny based version&lt;/p&gt;
+&lt;p&gt;Jeg kjøpte nettopp to
+&lt;a href=&quot;http://www.spykee-robot.com/&quot;&gt;Spykee&lt;/a&gt;-roboter, for test og
+leking.  Kjøpte to da det var så billige, og gir meg mulighet til å
+eksperimentere uten å være veldig redd for å ødelegge alt ved å bytte
+ut firmware og slikt.  Oppdaget at lekebutikken på Bryn senter hadde
+en liten stabel på lager som de ikke hadde klart å selge ut etter
+fjorårets juleinnkjøp, og var villig til å selge for en femtedel av
+vanlig pris.  Jeg, Ronny og Jarle har skaffet oss restbeholdningen, og
+det blir morsomt å se hva vi får ut av dette.&lt;/p&gt;
+
+&lt;p&gt;Roboten har belter styrt av to motorer, kamera, høytaler, mikrofon
+og wifi-tilkobling.  Det hele styrt av en GPL-lisensiert databoks som
+jeg mistenker kjører linux.  Firmware-kildekoden ble visst publisert i
+mai.  Eneste utfordringen er at kontroller-programvaren kun finnes til
+Windows, men det må en kunne jobbe seg rundt når vi har kildekoden til
+firmwaren. :)&lt;/p&gt;

 
 &lt;ul&gt;
 
 &lt;ul&gt;

-&lt;li&gt;Everything from Debian Squeeze
-&lt;ul&gt;
-  &lt;li&gt;Desktop environment KDE 4.4 =&gt; the new KDE desktop in
-         combination with some new artwork
-  &lt;li&gt;Web browser Iceweasel 3.5
-  &lt;li&gt;OpenOffice.org 3.2
-  &lt;li&gt;Educational toolbox GCompris 9.3
-  &lt;li&gt;Music creator Rosegarden 10.04.2
-  &lt;li&gt;Image editor Gimp 2.6.10
-  &lt;li&gt;Virtual universe Celestia 1.6.0
-  &lt;li&gt;Virtual stargazer Stellarium 0.10.4
-  &lt;li&gt;3D modeler Blender 2.49.2 (new application)
-  &lt;li&gt;Video editor Kdenlive 0.7.7 (new application)
-&lt;/ul&gt;&lt;/li&gt;
-&lt;li&gt;Now using Kerberos for password checking (migration not finished).
-    Enabled for:
-&lt;ul&gt;
-  &lt;li&gt;PAM
-  &lt;li&gt;LDAP
-  &lt;li&gt;IMAP
-  &lt;li&gt;SMTP (sender verification)
-&lt;/ul&gt;
-&lt;/li&gt;
-&lt;li&gt;New experimental roaming workstation profile for laptops.&lt;/li&gt;
-&lt;li&gt;Show welcome page to users when they first log in. The URL is
-    fetched from LDAP.&lt;/li&gt;
-&lt;li&gt;New LXDE desktop option, in addition to KDE (default) and Gnome.&lt;/li&gt;
-&lt;li&gt;General cleanup (not finished)&lt;/li&gt;
-&lt;/ul&gt;
-&lt;p&gt;The following features are not working as they should&lt;/p&gt;
-
-&lt;ul&gt;
-&lt;li&gt;No web based administration tool for creating users and groups. The
-    scripts ldap-createuser-krb and ldap-add-user-to-group can be used
-    for testing.&lt;/li&gt;
-&lt;li&gt;DVD installs are missing debian-installer images for the PXE boot,
-    and do not set up the PXE menu on eth0 because of this. LTSP
-    clients should still boot from eth1 on thin client servers.&lt;/li&gt;
-&lt;li&gt;The restructured KDE menu is not implemented.&lt;/li&gt;
-&lt;li&gt;The LDAP server setup need to be reviewed for security.&lt;/li&gt;
-&lt;li&gt;The LDAP directory structure need to be reworked.&lt;/li&gt;
-&lt;li&gt;Different sets of packages are installed when using the DVD and the
-    netinst CD. More packages are installed using the netinst CD.&lt;/li&gt;
-&lt;li&gt;The jackd package fail to install. This is believed to be caused by
-    some ongoing transition, and hopefully should be solved soon. The
-    jackd1 package can be installed manually for those that need it.&lt;/li&gt;
-&lt;li&gt;Some packages lack translations. See
-    http://wiki.debian.org/DebianEdu/Status/Squeeze for updated status,
-    and help out with translations.&lt;/li&gt;
-&lt;/ul&gt;
-
-&lt;p&gt;To download this multiarch netinstall release you can use&lt;/p&gt;
-
-&lt;ul&gt;
-&lt;li&gt;&lt;a href=&quot;ftp://ftp.skolelinux.org/skolelinux-cd/squeeze-alpha/debian-edu-6.0.0+edua0-CD.iso&quot;&gt;ftp://ftp.skolelinux.org/skolelinux-cd/squeeze-alpha/debian-edu-6.0.0+edua0-CD.iso&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;http://ftp.skolelinux.org/skolelinux-cd/squeeze-alpha/debian-edu-6.0.0+edua0-CD.iso&quot;&gt;http://ftp.skolelinux.org/skolelinux-cd/squeeze-alpha/debian-edu-6.0.0+edua0-CD.iso&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;rsync -avzP ftp.skolelinux.org::skolelinux-cd/squeeze-alpha/debian-edu-6.0.0+edua0-CD.iso&lt;/li&gt;
-&lt;/ul&gt;
-&lt;p&gt;To download this multiarch dvd release you can use&lt;/p&gt;
-
-&lt;ul&gt;
-&lt;li&gt;&lt;a href=&quot;ftp://ftp.skolelinux.org/skolelinux-cd/squeeze-alpha/debian-edu-6.0.0+edua0-DVD.iso&quot;&gt;ftp://ftp.skolelinux.org/skolelinux-cd/squeeze-alpha/debian-edu-6.0.0+edua0-DVD.iso&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;&lt;a href=&quot;http://ftp.skolelinux.org/skolelinux-cd/squeeze-alpha/debian-edu-6.0.0+edua0-DVD.iso&quot;&gt;http://ftp.skolelinux.org/skolelinux-cd/squeeze-alpha/debian-edu-6.0.0+edua0-DVD.iso&lt;/a&gt;&lt;/li&gt;
-&lt;li&gt;rsync -avzP ftp.skolelinux.org::skolelinux-cd/squeeze-alpha/debian-edu-6.0.0+edua0-DVD.iso&lt;/li&gt;
-&lt;/ul&gt;
-
-&lt;p&gt;There is no source DVD available yet. It will be prepared when we
-get closer to the final release.&lt;/p&gt;
-
-&lt;p&gt;The MD5SUM of these images are&lt;/p&gt;
-
-&lt;ul&gt;
-&lt;li&gt;3dbf45d59f42a53518b6e3c9ec3b5eb6 debian-edu-6.0.0+edua0-CD.iso&lt;/li&gt;
-&lt;li&gt;22f2cbfce281d1c6e478be452638675d debian-edu-6.0.0+edua0-DVD.iso&lt;/li&gt;
+&lt;li&gt;&lt;a href=&quot;http://en.wikipedia.org/wiki/Spykee&quot;&gt;Wikipedia-oppføring&lt;/a&gt;&lt;/li&gt;
+&lt;li&gt;&lt;a href=http://www.spykeeworld.com/spykee/US/freeSoftware.html&quot;&gt;Nedlasting av firmware-kilden&lt;/a&gt;&lt;/li&gt;
+&lt;li&gt;&lt;a href=&quot;http://wiki.nuug.no/grupper/robot&quot;&gt;prosjektwiki hos NUUG&lt;/a&gt;&lt;/li&gt;

 &lt;/ul&gt;
 &lt;/ul&gt;

-
-&lt;p&gt;The SHA1SUM of these images are&lt;/p&gt;
-&lt;ul&gt;
-&lt;li&gt;c53d1b69b40cf37cd27aefaf33f6f6a3821bedf0 debian-edu-6.0.0+edua0-CD.iso&lt;/li&gt;
-&lt;li&gt;2ec29d7db676d59d32197b05c277ffe16348376c debian-edu-6.0.0+edua0-DVD.iso&lt;/li&gt;
-&lt;/ul&gt;
-&lt;p&gt;How to report bugs:
-http://wiki.debian.org/DebianEdu/HowTo/ReportBugsInBugzilla&lt;/p&gt;
-
-&lt;p&gt;Please direct replies to debian-edu@lists.debian.org&lt;/p&gt;
-&lt;/blockquote&gt;
-</description>
-       </item>
-       
-       <item>
-               <title>One step closer to single signon in Debian Edu</title>
-               <link>http://people.skolelinux.org/pere/blog/One_step_closer_to_single_signon_in_Debian_Edu.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/One_step_closer_to_single_signon_in_Debian_Edu.html</guid>
-                <pubDate>Sun, 25 Jul 2010 10:00:00 +0200</pubDate>
-               <description>
-&lt;p&gt;The last few months me and the other Debian Edu developers have
-been working hard to get the Debian/Squeeze based version of Debian
-Edu/Skolelinux into shape.  This future version will use Kerberos for
-authentication, and services are slowly migrated to single signon,
-getting rid of password questions one at the time.&lt;/p&gt;
-
-&lt;p&gt;It will also feature a roaming workstation profile with local home
-directory, for laptops that are only some times on the Skolelinux
-network, and for this profile a shortcut is created in Gnome and KDE
-to gain access to the users home directory on the file server.  This
-shortcut uses SMB at the moment, and yesterday I had time to test if
-SMB mounting had started working in KDE after we added the cifs-utils
-package.  I was pleasantly surprised how well it worked.&lt;/p&gt;
-
-&lt;p&gt;Thanks to the recent changes to our samba configuration to get it
-to use Kerberos for authentication, there were no question about user
-password when mounting the SMB volume.  A simple click on the shortcut
-in the KDE menu, and a window with the home directory popped
-up. :)&lt;/p&gt;
-
-&lt;p&gt;One step closer to a single signon solution out of the box in
-Debian Edu.  We already had PAM, LDAP, IMAP and SMTP in place, and now
-also Samba.  Next step is Cups and hopefully also NFS.&lt;/p&gt;
-
-&lt;p&gt;We had planned a alpha0 release of Debian Edu for today, but thanks
-to the autobuilder administrators for some architectures being slow to
-sign packages, we are still missing the fixed LTSP package we need for
-the release.  It was uploaded three days ago with urgency=high, and if
-it had entered testing yesterday we would have been able to test it in
-time for a alpha0 release today.  As the binaries for ia64 and powerpc
-still not uploaded to the Debian archive, we need to delay the alpha
-release another day.&lt;/p&gt;
-
-&lt;p&gt;If you want to help out with implementing Kerberos for Debian Edu,
-please contact us on debian-edu@lists.debian.org.&lt;/p&gt;
-</description>
-       </item>
-       
-       <item>
-               <title>Digitale restriksjonsmekanismer fikk meg til å slutte å kjøpe musikk</title>
-               <link>http://people.skolelinux.org/pere/blog/Digitale_restriksjonsmekanismer_fikk_meg_til____slutte____kj__pe_musikk.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/Digitale_restriksjonsmekanismer_fikk_meg_til____slutte____kj__pe_musikk.html</guid>
-                <pubDate>Thu, 22 Jul 2010 23:50:00 +0200</pubDate>
-               <description>
-&lt;p&gt;For mange år siden slutte jeg å kjøpe musikk-CDer. Årsaken var at
-musikkbransjen var godt i gang med å selge platene sine med DRM som
-gjorde at jeg ikke fikk spilt av musikken jeg kjøpte på utstyret jeg
-hadde tilgjengelig, dvs. min datamaskin. Det var umulig å se på en
-plate om den var ødelagt eller ikke, og jeg hadde jo allerede en
-anseelig samling med plater, så jeg bestemme meg for å slutte å gi
-penger til en bransje som åpenbart ikke respekterte meg.&lt;/p&gt;
-
-&lt;p&gt;Jeg har mange titalls dager med musikk på CD i dag. Det meste er
-lagt i et stort arkiv som kan spilles av fra husets datamaskiner (har
-ikke rukket rippe alt). Jeg ser dermed ikke behovet for å skaffe mer
-musikk. De fleste av mine favoritter er i hus, og jeg er dermed godt
-fornøyd.&lt;/p&gt;
-
-&lt;p&gt;Hvis musikkbransjen ønsker mine penger, så må de demonstrere at de
-setter pris på meg som kunde, og ikke skremme meg bort med DRM og
-antydninger om at kundene er kriminelle.&lt;/p&gt;
-
-&lt;p&gt;Filmbransjen er like ille, men mens musikk gjerne varer lenge, er
-filmer mer ferskvare. Har dermed ikke helt sluttet å kjøpe filmer, men
-holder meg til DVD-filmer som kan spilles av på mine Linuxbokser.
-Kommer neppe til å ta i bruk Blueray, og ei heller de nye DRM-greiene
-«Ultraviolet» som be annonsert her om dagen.&lt;/p&gt;
-</description>
-       </item>
-       
-       <item>
-               <title>OpenStreetmap one step closer to having routing on its front page</title>
-               <link>http://people.skolelinux.org/pere/blog/OpenStreetmap_one_step_closer_to_having_routing_on_its_front_page.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/OpenStreetmap_one_step_closer_to_having_routing_on_its_front_page.html</guid>
-                <pubDate>Sun, 18 Jul 2010 16:45:00 +0200</pubDate>
-               <description>
-&lt;p&gt;Thanks to
-&lt;a href=&quot;http://feedproxy.google.com/~r/Opengeodata/~3/wUTCzDZk3lc/project-of-the-week-which-way-home&quot;&gt;todays
-opengeodata blog entry&lt;/a&gt;, I just discovered that the
-OpenStreetmap.org site have gotten
-&lt;a href=&quot;http://nroets.dev.openstreetmap.org/demo/index.html?layers=B000FTFTT&quot;&gt;support
-for calculating routes&lt;/a&gt;.  The support is still experimental and
-only available from the development server, until more experience is
-gathered on the user interface and any scalability issues.&lt;/p&gt;
-
-&lt;p&gt;Earlier, the routing I knew about using the OpenStreetmap.org data
-was provided by &lt;a href=&quot;http://maps.cloudmade.com/&quot;&gt;Cloudmade&lt;/a&gt;,
-but having it on the main page is required to make everyone aware of
-the issue.  I&#39;ve had people reject Openstreetmap.org as a viable
-alternative for them because the front page lacked routing support,
-and I hope their needs will be catered for when routing show up on the
-www.openstreetmap.org front page.&lt;/p&gt;
-</description>
-       </item>
-       
-       <item>
-               <title>What are they searching for - PowerDNS and ISC DHCP in LDAP</title>
-               <link>http://people.skolelinux.org/pere/blog/What_are_they_searching_for___PowerDNS_and_ISC_DHCP_in_LDAP.html</link>
-               <guid isPermaLink="true">http://people.skolelinux.org/pere/blog/What_are_they_searching_for___PowerDNS_and_ISC_DHCP_in_LDAP.html</guid>
-                <pubDate>Sat, 17 Jul 2010 21:00:00 +0200</pubDate>
-               <description>
-&lt;p&gt;This is a
-&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Time_for_new__LDAP_schemas_replacing_RFC_2307_.html&quot;&gt;followup&lt;/a&gt;
-on my
-&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Idea_for_a_change_to_LDAP_schemas_allowing_DNS_and_DHCP_info_to_be_combined_into_one_object.html&quot;&gt;previous
-work&lt;/a&gt; on
-&lt;a href=&quot;http://people.skolelinux.org/pere/blog/Combining_PowerDNS_and_ISC_DHCP_LDAP_objects.html&quot;&gt;merging
-all&lt;/a&gt; the computer related LDAP objects in Debian Edu.&lt;/p&gt;
-
-&lt;p&gt;As a step to try to see if it possible to merge the DNS and DHCP
-LDAP objects, I have had a look at how the packages pdns-backend-ldap
-and dhcp3-server-ldap in Debian use the LDAP server.  The two
-implementations are quite different in how they use LDAP.&lt;/p&gt;
-
-To get this information, I started slapd with debugging enabled and
-dumped the debug output to a file to get the LDAP searches performed
-on a Debian Edu main-server.  Here is a summary.
-
-&lt;p&gt;&lt;strong&gt;powerdns&lt;/strong&gt;&lt;/p&gt;
-
-&lt;a href=&quot;http://www.linuxnetworks.de/doc/index.php/PowerDNS_LDAP_Backend&quot;&gt;Clues
-on how to&lt;/a&gt; set up PowerDNS to use a LDAP backend is available on
-the web.
-
-&lt;p&gt;PowerDNS have two modes of operation using LDAP as its backend.
-One &quot;strict&quot; mode where the forward and reverse DNS lookups are done
-using the same LDAP objects, and a &quot;tree&quot; mode where the forward and
-reverse entries are in two different subtrees in LDAP with a structure
-based on the DNS names, as in tjener.intern and
-2.2.0.10.in-addr.arpa.&lt;/p&gt;
-
-&lt;p&gt;In tree mode, the server is set up to use a LDAP subtree as its
-base, and uses a &quot;base&quot; scoped search for the DNS name by adding
-&quot;dc=tjener,dc=intern,&quot; to the base with a filter for
-&quot;(associateddomain=tjener.intern)&quot; for the forward entry and
-&quot;dc=2,dc=2,dc=0,dc=10,dc=in-addr,dc=arpa,&quot; with a filter for
-&quot;(associateddomain=2.2.0.10.in-addr.arpa)&quot; for the reverse entry.  For
-forward entries, it is looking for attributes named dnsttl, arecord,
-nsrecord, cnamerecord, soarecord, ptrrecord, hinforecord, mxrecord,
-txtrecord, rprecord, afsdbrecord, keyrecord, aaaarecord, locrecord,
-srvrecord, naptrrecord, kxrecord, certrecord, dsrecord, sshfprecord,
-ipseckeyrecord, rrsigrecord, nsecrecord, dnskeyrecord, dhcidrecord,
-spfrecord and modifytimestamp.  For reverse entries it is looking for
-the attributes dnsttl, arecord, nsrecord, cnamerecord, soarecord,
-ptrrecord, hinforecord, mxrecord, txtrecord, rprecord, aaaarecord,
-locrecord, srvrecord, naptrrecord and modifytimestamp.  The equivalent
-ldapsearch commands could look like this:&lt;/p&gt;
-
-&lt;blockquote&gt;&lt;pre&gt;
-ldapsearch -h ldap \
-  -b dc=tjener,dc=intern,ou=hosts,dc=skole,dc=skolelinux,dc=no \
-  -s base -x &#39;(associateddomain=tjener.intern)&#39; dNSTTL aRecord nSRecord \
-  cNAMERecord sOARecord pTRRecord hInfoRecord mXRecord tXTRecord \
-  rPRecord aFSDBRecord KeyRecord aAAARecord lOCRecord sRVRecord \
-  nAPTRRecord kXRecord certRecord dSRecord sSHFPRecord iPSecKeyRecord \
-  rRSIGRecord nSECRecord dNSKeyRecord dHCIDRecord sPFRecord modifyTimestamp
-
-ldapsearch -h ldap \
-  -b dc=2,dc=2,dc=0,dc=10,dc=in-addr,dc=arpa,ou=hosts,dc=skole,dc=skolelinux,dc=no \
-  -s base -x &#39;(associateddomain=2.2.0.10.in-addr.arpa)&#39;
-  dnsttl, arecord, nsrecord, cnamerecord soarecord ptrrecord \
-  hinforecord mxrecord txtrecord rprecord aaaarecord locrecord \
-  srvrecord naptrrecord modifytimestamp
-&lt;/pre&gt;&lt;/blockquote&gt;
-
-&lt;p&gt;In Debian Edu/Lenny, the PowerDNS tree mode is used with
-ou=hosts,dc=skole,dc=skolelinux,dc=no as the base, and these are two
-example LDAP objects used there.  In addition to these objects, the
-parent objects all th way up to ou=hosts,dc=skole,dc=skolelinux,dc=no
-also exist.&lt;/p&gt;
-
-&lt;blockquote&gt;&lt;pre&gt;
-dn: dc=tjener,dc=intern,ou=hosts,dc=skole,dc=skolelinux,dc=no
-objectclass: top
-objectclass: dnsdomain
-objectclass: domainrelatedobject
-dc: tjener
-arecord: 10.0.2.2
-associateddomain: tjener.intern
-
-dn: dc=2,dc=2,dc=0,dc=10,dc=in-addr,dc=arpa,ou=hosts,dc=skole,dc=skolelinux,dc=no
-objectclass: top
-objectclass: dnsdomain2
-objectclass: domainrelatedobject
-dc: 2
-ptrrecord: tjener.intern
-associateddomain: 2.2.0.10.in-addr.arpa
-&lt;/pre&gt;&lt;/blockquote&gt;
-
-&lt;p&gt;In strict mode, the server behaves differently.  When looking for
-forward DNS entries, it is doing a &quot;subtree&quot; scoped search with the
-same base as in the tree mode for a object with filter
-&quot;(associateddomain=tjener.intern)&quot; and requests the attributes dnsttl,
-arecord, nsrecord, cnamerecord, soarecord, ptrrecord, hinforecord,
-mxrecord, txtrecord, rprecord, aaaarecord, locrecord, srvrecord,
-naptrrecord and modifytimestamp.  For reverse entires it also do a
-subtree scoped search but this time the filter is &quot;(arecord=10.0.2.2)&quot;
-and the requested attributes are associateddomain, dnsttl and
-modifytimestamp.  In short, in strict mode the objects with ptrrecord
-go away, and the arecord attribute in the forward object is used
-instead.&lt;/p&gt;
-
-&lt;p&gt;The forward and reverse searches can be simulated using ldapsearch
-like this:&lt;/p&gt;
-
-&lt;blockquote&gt;&lt;pre&gt;
-ldapsearch -h ldap -b ou=hosts,dc=skole,dc=skolelinux,dc=no -s sub -x \
-  &#39;(associateddomain=tjener.intern)&#39; dNSTTL aRecord nSRecord \
-  cNAMERecord sOARecord pTRRecord hInfoRecord mXRecord tXTRecord \
-  rPRecord aFSDBRecord KeyRecord aAAARecord lOCRecord sRVRecord \
-  nAPTRRecord kXRecord certRecord dSRecord sSHFPRecord iPSecKeyRecord \
-  rRSIGRecord nSECRecord dNSKeyRecord dHCIDRecord sPFRecord modifyTimestamp
-
-ldapsearch -h ldap -b ou=hosts,dc=skole,dc=skolelinux,dc=no -s sub -x \
-  &#39;(arecord=10.0.2.2)&#39; associateddomain dnsttl modifytimestamp
-&lt;/pre&gt;&lt;/blockquote&gt;
-
-&lt;p&gt;In addition to the forward and reverse searches , there is also a
-search for SOA records, which behave similar to the forward and
-reverse lookups.&lt;/p&gt;
-
-&lt;p&gt;A thing to note with the PowerDNS behaviour is that it do not
-specify any objectclass names, and instead look for the attributes it
-need to generate a DNS reply.  This make it able to work with any
-objectclass that provide the needed attributes.&lt;/p&gt;
-
-&lt;p&gt;The attributes are normally provided in the cosine (RFC 1274) and
-dnsdomain2 schemas.  The latter is used for reverse entries like
-ptrrecord and recent DNS additions like aaaarecord and srvrecord.&lt;/p&gt;
-
-&lt;p&gt;In Debian Edu, we have created DNS objects using the object classes
-dcobject (for dc), dnsdomain or dnsdomain2 (structural, for the DNS
-attributes) and domainrelatedobject (for associatedDomain).  The use
-of structural object classes make it impossible to combine these
-classes with the object classes used by DHCP.&lt;/p&gt;
-
-&lt;p&gt;There are other schemas that could be used too, for example the
-dnszone structural object class used by Gosa and bind-sdb for the DNS
-attributes combined with the domainrelatedobject object class, but in
-this case some unused attributes would have to be included as well
-(zonename and relativedomainname).&lt;/p&gt;
-
-&lt;p&gt;My proposal for Debian Edu would be to switch PowerDNS to strict
-mode and not use any of the existing objectclasses (dnsdomain,
-dnsdomain2 and dnszone) when one want to combine the DNS information
-with DHCP information, and instead create a auxiliary object class
-defined something like this (using the attributes defined for
-dnsdomain and dnsdomain2 or dnszone):&lt;/p&gt;
-
-&lt;blockquote&gt;&lt;pre&gt;
-objectclass ( some-oid NAME &#39;dnsDomainAux&#39;
-    SUP top
-    AUXILIARY
-    MAY ( ARecord $ MDRecord $ MXRecord $ NSRecord $ SOARecord $ CNAMERecord $
-          DNSTTL $ DNSClass $ PTRRecord $ HINFORecord $ MINFORecord $
-          TXTRecord $ SIGRecord $ KEYRecord $ AAAARecord $ LOCRecord $
-          NXTRecord $ SRVRecord $ NAPTRRecord $ KXRecord $ CERTRecord $
-          A6Record $ DNAMERecord
-    ))
-&lt;/pre&gt;&lt;/blockquote&gt;
-
-&lt;p&gt;This will allow any object to become a DNS entry when combined with
-the domainrelatedobject object class, and allow any entity to include
-all the attributes PowerDNS wants.  I&#39;ve sent an email to the PowerDNS
-developers asking for their view on this schema and if they are
-interested in providing such schema with PowerDNS, and I hope my
-message will be accepted into their mailing list soon.&lt;/p&gt;
-
-&lt;p&gt;&lt;strong&gt;ISC dhcp&lt;/strong&gt;&lt;/p&gt;
-
-&lt;p&gt;The DHCP server searches for specific objectclass and requests all
-the object attributes, and then uses the attributes it want.  This
-make it harder to figure out exactly what attributes are used, but
-thanks to the working example in Debian Edu I can at least get an idea
-what is needed without having to read the source code.&lt;/p&gt;
-
-&lt;p&gt;In the DHCP server configuration, the LDAP base to use and the
-search filter to use to locate the correct dhcpServer entity is
-stored.  These are the relevant entries from
-/etc/dhcp3/dhcpd.conf:&lt;/p&gt;
-
-&lt;blockquote&gt;&lt;pre&gt;
-ldap-base-dn &quot;dc=skole,dc=skolelinux,dc=no&quot;;
-ldap-dhcp-server-cn &quot;dhcp&quot;;
-&lt;/pre&gt;&lt;/blockquote&gt;
-
-&lt;p&gt;The DHCP server uses this information to nest all the DHCP
-configuration it need.  The cn &quot;dhcp&quot; is located using the given LDAP
-base and the filter &quot;(&amp;(objectClass=dhcpServer)(cn=dhcp))&quot;.  The
-search result is this entry:&lt;/p&gt;
-
-&lt;blockquote&gt;&lt;pre&gt;
-dn: cn=dhcp,dc=skole,dc=skolelinux,dc=no
-cn: dhcp
-objectClass: top
-objectClass: dhcpServer
-dhcpServiceDN: cn=DHCP Config,dc=skole,dc=skolelinux,dc=no
-&lt;/pre&gt;&lt;/blockquote&gt;
-
-&lt;p&gt;The content of the dhcpServiceDN attribute is next used to locate the
-subtree with DHCP configuration.  The DHCP configuration subtree base
-is located using a base scope search with base &quot;cn=DHCP
-Config,dc=skole,dc=skolelinux,dc=no&quot; and filter
-&quot;(&amp;(objectClass=dhcpService)(|(dhcpPrimaryDN=cn=dhcp,dc=skole,dc=skolelinux,dc=no)(dhcpSecondaryDN=cn=dhcp,dc=skole,dc=skolelinux,dc=no)))&quot;.
-The search result is this entry:&lt;/p&gt;
-
-&lt;blockquote&gt;&lt;pre&gt;
-dn: cn=DHCP Config,dc=skole,dc=skolelinux,dc=no
-cn: DHCP Config
-objectClass: top
-objectClass: dhcpService
-objectClass: dhcpOptions
-dhcpPrimaryDN: cn=dhcp, dc=skole,dc=skolelinux,dc=no
-dhcpStatements: ddns-update-style none
-dhcpStatements: authoritative
-dhcpOption: smtp-server code 69 = array of ip-address
-dhcpOption: www-server code 72 = array of ip-address
-dhcpOption: wpad-url code 252 = text
-&lt;/pre&gt;&lt;/blockquote&gt;
-
-&lt;p&gt;Next, the entire subtree is processed, one level at the time.  When
-all the DHCP configuration is loaded, it is ready to receive requests.
-The subtree in Debian Edu contain objects with object classes
-top/dhcpService/dhcpOptions, top/dhcpSharedNetwork/dhcpOptions,
-top/dhcpSubnet, top/dhcpGroup and top/dhcpHost.  These provide options
-and information about netmasks, dynamic range etc.  Leaving out the
-details here because it is not relevant for the focus of my
-investigation, which is to see if it is possible to merge dns and dhcp
-related computer objects.&lt;/p&gt;
-
-&lt;p&gt;When a DHCP request come in, LDAP is searched for the MAC address
-of the client (00:00:00:00:00:00 in this example), using a subtree
-scoped search with &quot;cn=DHCP Config,dc=skole,dc=skolelinux,dc=no&quot; as
-the base and &quot;(&amp;(objectClass=dhcpHost)(dhcpHWAddress=ethernet
-00:00:00:00:00:00))&quot; as the filter.  This is what a host object look
-like:&lt;/p&gt;
-
-&lt;blockquote&gt;&lt;pre&gt;
-dn: cn=hostname,cn=group1,cn=THINCLIENTS,cn=DHCP Config,dc=skole,dc=skolelinux,dc=no
-cn: hostname
-objectClass: top
-objectClass: dhcpHost
-dhcpHWAddress: ethernet 00:00:00:00:00:00
-dhcpStatements: fixed-address hostname
-&lt;/pre&gt;&lt;/blockquote&gt;
-
-&lt;p&gt;There is less flexiblity in the way LDAP searches are done here.
-The object classes need to have fixed names, and the configuration
-need to be stored in a fairly specific LDAP structure.  On the
-positive side, the invidiual dhcpHost entires can be anywhere without
-the DN pointed to by the dhcpServer entries.  The latter should make
-it possible to group all host entries in a subtree next to the
-configuration entries, and this subtree can also be shared with the
-DNS server if the schema proposed above is combined with the dhcpHost
-structural object class.
-
-&lt;p&gt;&lt;strong&gt;Conclusion&lt;/strong&gt;&lt;/p&gt;
-
-&lt;p&gt;The PowerDNS implementation seem to be very flexible when it come
-to which LDAP schemas to use.  While its &quot;tree&quot; mode is rigid when it
-come to the the LDAP structure, the &quot;strict&quot; mode is very flexible,
-allowing DNS objects to be stored anywhere under the base cn specified
-in the configuration.&lt;/p&gt;
-
-&lt;p&gt;The DHCP implementation on the other hand is very inflexible, both
-regarding which LDAP schemas to use and which LDAP structure to use.
-I guess one could implement ones own schema, as long as the
-objectclasses and attributes have the names used, but this do not
-really help when the DHCP subtree need to have a fairly fixed
-structure.&lt;/p&gt;
-
-&lt;p&gt;Based on the observed behaviour, I suspect a LDAP structure like
-this might work for Debian Edu:&lt;/p&gt;
-
-&lt;blockquote&gt;&lt;pre&gt;
-ou=services
-  cn=machine-info (dhcpService) - dhcpServiceDN points here
-    cn=dhcp (dhcpServer)
-    cn=dhcp-internal (dhcpSharedNetwork/dhcpOptions)
-      cn=10.0.2.0 (dhcpSubnet)
-        cn=group1 (dhcpGroup/dhcpOptions)
-    cn=dhcp-thinclients (dhcpSharedNetwork/dhcpOptions)
-      cn=192.168.0.0 (dhcpSubnet)
-        cn=group1 (dhcpGroup/dhcpOptions)
-    ou=machines - PowerDNS base points here
-      cn=hostname (dhcpHost/domainrelatedobject/dnsDomainAux)
-&lt;/pre&gt;&lt;/blockquote&gt;
-
-&lt;P&gt;This is not tested yet.  If the DHCP server require the dhcpHost
-entries to be in the dhcpGroup subtrees, the entries can be stored
-there instead of a common machines subtree, and the PowerDNS base
-would have to be moved one level up to the machine-info subtree.&lt;/p&gt;
-
-&lt;p&gt;The combined object under the machines subtree would look something
-like this:&lt;/p&gt;
-    
-&lt;blockquote&gt;&lt;pre&gt;
-dn: dc=hostname,ou=machines,cn=machine-info,dc=skole,dc=skolelinux,dc=no
-dc: hostname
-objectClass: top
-objectClass: dhcpHost
-objectclass: domainrelatedobject
-objectclass: dnsDomainAux
-associateddomain: hostname.intern
-arecord: 10.11.12.13
-dhcpHWAddress: ethernet 00:00:00:00:00:00
-dhcpStatements: fixed-address hostname.intern
-&lt;/pre&gt;&lt;/blockquote&gt;
-
-&lt;/p&gt;One could even add the LTSP configuration associated with a given
-machine, as long as the required attributes are available in a
-auxiliary object class.&lt;/p&gt;

 </description>
        </item>
        
 </description>
        </item>