> > >>>> > > >>>> it is possible to enable shared memory when pulseaudio is > > >>>> stared in system mode? > > >>> > > >>> Not without recompiling PulseAudio, the relevant code is > > >>> in src/pulsecore/protocol_native.c, function > > >>> command_auth: > > >>> > > >>> #ifdef HAVE_CREDS > > >>> > > >>> if (do_shm) { > > >>> > > >>> /* Only enable SHM if both sides are owned by > > >>> the > > >>> > > >>> same * user. This is a security measure because otherwise > > >>> data * private to the user might leak. */ > > >>> > > >>> const pa_creds *creds; > > >>> if (!(creds = pa_pdispatch_creds(pd)) || > > >>> getuid() != > > >>> > > >>> creds->uid) do_shm = false; > > >>> > > >>> } > > >>> > > >>> #endif > > >>> > > >>> Maybe there's more stuff that needs to be changed as well, > > >>> I don't know. > > >> > > >> Ok, so what about adding parameter which force SHM support > > >> if user/administrator/owner of system want to do that? > > > > > > That sounds like a good idea. > > > > I'm hesitating. I'm not saying I'm totally against it, but the > > security implications are somewhat scary - I assume this > > means you have to open up the shm files to the world, which > > means all users can spy on each other's audio. The srbchannel > > shm file will also be writable by all users, so one user can > > potentially enter commands in another user's stream... > > > > Yes and this is what in some situation I want! > > It is useful in case when you have one desktop computer which is > used by two (or maybe more) trusted persons and each has own > profile. Do your desktop have two sound cards or just want to use multi streaming of hda-intel for two or three users using analog playback, alt analog playback, digital, analog capture and alt analog capture devices > > Or if you have 2 (or more) users (in system) only because some > crappy applications support only one instance per user (session). Any example ?