multi-user capable programs - need info on how they are installed and work
 

hello and good day LQ.


I've been looking for some guides, tutorials, howtos or documentations about how a multi-user capable program work. I need it to work my music playing script work correctly.

Does anybody here know any idea about, or do you know links or files that have such info?


Explaination:

This I mean programs (e.g. firefox) that uses the user directory of a user for storing data (e.g. ~/.firefox) but is still also able to read and write to global or shared directories like /var/tmp/firefox.

I know we can just do chmod 0777 /var/tmp/firefox but I think it will be unclean and may also cause risk in securities.

We can also make a group so that we can access /var/tmp/firefox using permissions like 0770 but I'm still finding a simpler method than that.

Can SETUID also help?


Status:

I've already been looking for good info in google but I failed.

I'm still on my way on making my program done. It's a music playing script I call playshell. The script is already capable of running in multi-user mode but the workaround is unclean.

You can check the script at http://sf.net/projects/playshell.

The original thread btw where I first introduced the program (it's actually about playing music in console) is here.


Any info shall be greatly appreciated.

Thanks in advance :)

konsolebox