Re: Fwd: Re: lib/50276: [PATCH] Portability fixes for ossaudio.c

[Olaf Buddenhagen]

Hi,

On Thu, Sep 24, 2015 at 08:18:37PM +0200, Samuel Thibault wrote:

> It may still be impossible at the moment actually.  The
> SNDCTL_DSP_MAPINBUF and SNDCTL_DSP_MAPOUTBUF ioctls are precisely
> examples: they pass a struct which contains the address of a buffer.
> This can not be expressed with the current handling of ioctls in
> GNU/Hurd: the sound server can't read/write the client process memory.

AIUI, it is possible by adding explicit stubs for these specific ioctls
to our glibc. I think this is used both for ioctls with too many
parameters to encode them with the standard RPC ID mapping scheme, and
for ioctls with "problematic" parameters like these?

-antrik-