Linux

Believe it or not, but latest Ubuntu release 1) does not include the latest PHP yet and 2) does not include mssql module.

Reading the newsgroups and forums, it seems nobody have a real tutorial on how to add it. You will also notice that Ubuntu builders have no plan to include it one day… (even if it is free, not under specific licence and need almost no dependency (Freetds is needed but I don’t know if it is mandatory to build).

Whatever, I need this module, and I came with a working solution :

apt-get source php5
cd /usr/lib/php5/php5-5.2.3/ext/mssql
phpize
./configure
make
make install

Just create a ini file in /etc/php5/conf.d/mssql.ini with :

# configuration for php MsSQL
moduleextension=mssql.so

And restart you Apache server.

!! Be warned that the module may be removed at the next package upgrade !! You will have to compile it again.

I’m really supprised today to see how applications uses Jack (the Linux – and other now – audio patch).

The Jack plus name is made of two parts : the application name and the « channel » name. The application name must be unique globaly, and the channel must be unique in each application.
While some seems to be configurable in both parts, some are not :

Darkice, by defaults, create a « darkice-PID:left » and  « darkice-PID:right », where PID is the real process ID of Darkice. This ensure 2 darkice will not have the same name. The drowback is that it is very hard to find which darkice is which, moreover if you want to script that.
I made a patch for darkice so you can freely change that.

With Ecasound, a command line sound mixer and processing you can only change the channel name. If you start more Ecasound, you will have another process ecasound_2, then ecasound_3… which is not really better than the way Darkice is doing it natively.
Another issue is when you kill one Ecasound, they all die ! This is a huge issue I will have to work on quickly, but I’m pretty sure this is due to a jack naming issue.

Then what should the convention be ?

As the important part is the application name, not the channel name, it seems that this part should be configurable.  Then the channel name could be, by default, either a direction and a number, or a direction and a name :

- ecasound-test1:in_1
-  ecasound-test1:in_2
- ecasound-test1:out_1
- ecasound-test1:ou_2

- ecasound-filter2:in_left
- ecasound-filter2:in_right

Devs, please, think of it !

This has always been a mess for sysadmins. Even good onces always get fooled by UNIX file rights and umask calculation.
The base is simple :
take 777 and substract the umask. If umask is 022, you’ll get a file permission of 755, which mean rwx-rwx-rwx.
Remember that 7 is 0111 in binary, so the rights are only triggered if a 1 is set.
First number is the « setUID bit », second the read, then the write, and the execute right.

But how to do this in C++ ?
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Meme si je n’utilise pas ubuntu, ca peut tjrs etre utile. Je viens de passer dessus, donc je vous en fais profiter : http://www.prendreuncafe.com/blog/post/2006/09/05/489-installer-et-configurer-apache2-trac-et-subversion-sur-ubuntu