[alsa-devel] [PATCH] aplay: fix lurking capture file overwrite bug

[Alan Horstmann]

On Thursday 14 April 2016 05:32, David Fries wrote:
> If -d was given to arecord while commit
> 8aa13eec80eac312e4b99423909387660fb99b8f (now reverted) was in effect,
> the last read would be shorter than the chunk size, but pcm_read would
> read and return the chunk size, the samples were discarded, and
> capture() continued in a loop because count never reached 0.  arecord
> opens a new file each loop iteration, if arecord is dynamically naming
> files, --use-strftime option or beyond the wave 2GB limit, this will
> generate a series of header only wave files. 

<snip>

> Debian has the effectively broken pcm_read,

It is fortunate for me that you mentioned those details as I have just been 
bitten by exactly that, using arecord whilst tracking down a Portaudio issue 
in Debian Jessie!  I was gearing up to report the bug, assuming it was in the 
capture system.

It seems a pity that Debian Jessie stable doesn't have a backport of the 
fix/revert.

Now back to tracing the original issue...

Regards

Alan