[alsa-devel] How to close ALSA device nodes? / ALSA's fds

Daniel Yek dyek at real.com
Fri Oct 23 20:51:45 CEST 2009

[Branch the thread for a separate suggestion...]

Rémi Denis-Courmont wrote:
> Le dimanche 18 octobre 2009 20:13:15 Robert Hancock, vous avez écrit :
>>> From the earlier thread, I reckon that ALSA developers consider that
>>> this
>>> is an upper-layer issue. Maybe so, but then how is the upper-layer
>>> supposed to find which file descriptors ALSA-lib has opened - if any?
>>> Conversely, if ALSA- lib won't tell while file descriptors it is using,
>>> what could possibly be the use case for not closing those on exec?
>> I agree that it's a difficult problem for an app that wants to fork
>> and exec another process.. I'd think really should be some way for an
>> app to control the CLOEXEC flag for the file descriptors that alsa-lib
>> has open..
> <snip>
> That said, I still fail to see any potential use case to not set the
> flag.
> Since ALSA-lib won't let the application know about the file handles, any
> application cannot a use them across exec() in the first place.

Is snd_pcm_poll_descriptors() adequate for this particular issue?


Daniel Yek.

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