Multiple groups

I'm referring to Fedora 11.

The output of "ls":

crw-rw----. 1 root audio 14, 3 2009-08-04 09:51 /dev/dsp
crw-rw----. 1 root dialout 4, 65 2009-08-04 06:00 /dev/ttyS1

The user ALPHA wants to run the application BETA, which needs both
/dev/dsp and /dev/ttyS1. ALPHA is member of the audio and dialout groups.

-) The application BETA should not run as root for evident reasons.
-) I do not want to change the group of /dev/dsp and /dev/ttyS1 because
this could introduce inconsistencies with other applications of Fedora 11.
-) If I understand well, ACL cannot be used to resolve the problem.

Is is really necessary to make /dev/dsp and /dev/ttyS1 RW accessible to
all in order to run BETA as user ALPHA ? Or are there better solutions ?

Thanks a lot !

Claude

Claude Frantz wrote:
> I'm referring to Fedora 11.
>
> The output of "ls":
>
> crw-rw----. 1 root audio 14, 3 2009-08-04 09:51 /dev/dsp
> crw-rw----. 1 root dialout 4, 65 2009-08-04 06:00 /dev/ttyS1
>
> The user ALPHA wants to run the application BETA, which needs both
> /dev/dsp and /dev/ttyS1. ALPHA is member of the audio and dialout groups.
>

Provided BETA is not running as setsuid in someway, that will work fine.

de