sessiond provides a way to have some system wide device name (ie /dev/dsp) points on 
different devices, depending on environnment variable (ie DISPLAY)

It is a simple filesystem for fuse. You need to have the fuse library and kernel module
installed (see http://freshmeat.net/redir/fuse/54432/url_homepage/fuse.sourceforge.net).

Provided files are ready for Fedora core 3. By default, process using display :0 will 
use dsp1,mixer1, ... and display :1 will use dsp0,mixer0 (weird ? it's my setup ...)

For other distribution, you need to :

* make & copy sessiond from the src directory in /usr/local/sessiond/ 

* In /dev, you must create symbolic links to /var/sessions/currents/current/[dsp|adsp|...]
  Make sure that udev will not create /dev/dsp by itself, or erase it at next boot. 
  (see provided /etc/udev/... for hints)

* In /var/sessions/currents/:0 and /var/sessions/currents/:1, you must create the session
  specific symbolic link (ie /var/sessions/currents/:0/dsp will link to /dev/dsp0, ...)

* have sessiond.d run at boot time (it is a sysinit script). You can adjust it to create 
  new sessions (other than :0 & :1)

Then, /dev/dsp will link to /dev/dsp0 or /dev/dsp1, depending on the DISPLAY environnment 
variable of the caller process.

Contact: pludov@nnx.com