[alsa-devel] Third time: Unlink PCM resource ?

Jaroslav Kysela perex at perex.cz
Mon May 25 20:31:42 CEST 2009

On Mon, 25 May 2009, Werner Van Belle wrote:

> Takashi Iwai wrote:
>> You can control it via fcntl().  See fcntl(2) man page.
> I looked at that but I didn't find any place in alsalib (or libalsa
> whatever the order of those two words), where I can obtain the file
> handle. They are all of type pcm_something_t. I found a file handle
> quite deep in this library but there seems no way to actually obtain
> that handle.
> Do you think fcntl on a pcm_t device would work (if we got it to compile
> first :-)

snd_pcm_poll_descriptors / snd_pcm_poll_descriptors_count

But I wonder why snd_pcm_close() does not work in child process. Could you 
show us 'strace -f -e trace=open,close' for your program?


Jaroslav Kysela <perex at perex.cz>
Linux Kernel Sound Maintainer
ALSA Project, Red Hat, Inc.

More information about the Alsa-devel mailing list