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Re: pulseaudio causing crashing of applications



On Thu, Feb 14, 2008 at 07:54:15AM -0600, Les Mikesell wrote:
> >Because the device changes ownership
> 
> Traditional unix behavior is that open file descriptors stay open and 
> working even if access permissions change.

Actually no. The tty behaviour has been different since the earliest days
for precisely these reasons

> turn instead of rudely breaking a working process).  I can see where 
> this might make sense on the VT keyboard since that device is 
> necessarily shared during the procedure.  But it doesn't make any more 
> sense to interrupt a running phone or music player session because 
> someone else is temporarily using a certain keybord than it would to 
> break a running tape backup for the same circumstance.  Or at least this 
> should be left as an easily chosen local policy.

And local policy should defalt to security first.

> the first session being interrupted has root access anyway and could 
> bypass the access restrictions the switch tries to impose.  Wouldn't it 
> be better to kernel locking or some mechanism that can really ensure 
> exclusive access for situations like a phone session?

VT switch locking policy is handled by X, and by X clients, the kernel just
implements the rules.

Your objections really make no rational sense anyway, you don't "accidentally"
switch sessions to another user.

Alan


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