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List:       suse-linux-e
Subject:    Re: [SLE] How to prevent audio device change owner after normal session log in
From:       Anders Johansson <andjoh () rydsbo ! net>
Date:       2005-03-07 19:57:26
Message-ID: 200503071957.27313.andjoh () rydsbo ! net
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On Monday 07 March 2005 19:51, Rocky Zhang wrote:
> Hi,
>
> I have a computer running with SuSe 9.1, KDE desktop. And I connected 2
> USB audio headsets to my computer. I found that before user log in, the
> audio devices (such as /dev/dsp*, /dev/snd/*) owner is root:audio,
> permission is 660; After one user log in, all the audio device files
> change owner to $USER:audio, permission change to 600, so another users
> can't have permission to use the USB headset.  How can I prevent it
> ( keep audio device owner always root, and permission is 660, no matter
> user login or not)?
>
> I know in Fedora Core 2/3 and Mandrake 10.1, it's a configuration file
> ( /etc/security/console.perms) , which is included in pam RPM,
> that you can edit to prevent normal session login change audio device
> owner.  I checked my SuSe ( version 9.1), there does have  pam-0.77-221
> RPM there, but there is no such file (/etc/security/console.perms)
> included in the RPM. How does SuSe control device owner and permission
> when normal session log in which are controlled by PAM and console.perms
> configuration file in other Linux Distribution?

The permissions are controlled by the file /etc/logindevperm where you can 
control in detail which files get chown()ed, and if you want to stop the 
chown()ing altogether remove the line "session required pam_devperm.so" from 
the files /etc/pam.d/xdm and /etc/pam.d/xdm-np

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