The /usr/share/gnome/default.session file contains a list of programs to be launched the first time a user logs into the GNOME environment.
The format of the file is the one used by the gnome_config libraries, and it looks like this:
[Section] SEQID,id=uniqueID SEQID,Priority=PRIO SEQID,RestartCommand=command num_clients=TOP
There are three possible names for Section And they are:
Since the gnome_config file format is not very flexible, an array of data is emulated by listing starting from 0 chunks of "id,Priority,RestartCommand", and at the end the num_clients variable lists the number of chunks listed.
The uniqueid key provides a name that is unique within this file and passed to the app as the client id which it must use to register with gnome-session.
The RestartCommand specifies the command to run from the $PATH.
The Priority determines the order in which the commands are started (with Priority = 0 first) and defaults to 50.
The clients must be numbered from 0 to the value of num_clients-1