On Oct 17 11:46:07, dera...@openbsd.org wrote: > Jan Stary <h...@stare.cz> wrote: > > > On Oct 17 11:29:58, dera...@openbsd.org wrote: > > > Jan Stary <h...@stare.cz> wrote: > > > > > > > On Oct 17 11:02:19, dera...@openbsd.org wrote: > > > > > Jan Stary <h...@stare.cz> wrote: > > > > > > > > > > > Currently, the decription of sndiod -a says > > > > > > > > > > > > If the flag is off, then it's automatically closed, > > > > > > allowing other programs to have direct access to the audio > > > > > > device, > > > > > > or the device to be disconnected. The default is off. > > > > > > > > > > > > That's not true anymore: programs only access the audio HW > > > > > > through the running sndiod, right? > > > > > > > > > > and if there is no running sndiod, then someone who has written a > > > > > program to access the audio hardware directly, can. > > > > > > > > crw-rw---- 1 root _sndiop 42, 0 Oct 17 19:04 /dev/audio0 > > > > crw-rw---- 1 root _sndiop 42, 1 Oct 16 09:29 /dev/audio1 > > > > crw-rw---- 1 root _sndiop 42, 2 Oct 15 21:24 /dev/audio2 > > > > crw-rw---- 1 root _sndiop 42, 3 Oct 15 21:24 /dev/audio3 > > > > crw-rw---- 1 root _sndiop 42, 192 Oct 15 21:24 /dev/audioctl0 > > > > crw-rw---- 1 root _sndiop 42, 193 Oct 15 21:24 /dev/audioctl1 > > > > crw-rw---- 1 root _sndiop 42, 194 Oct 15 21:24 /dev/audioctl2 > > > > crw-rw---- 1 root _sndiop 42, 195 Oct 15 21:24 /dev/audioctl3 > > > > > > > > The device is chgrp'ed precisely so that they _can't_, right? > > > > > > What if the other program is run as root, and the reader has permission? > > > > Well, a program run as root can do whatever it wants. > > > > What I meant was the wording in the sndiod -a documentation: > > for "other programs to have direct access to the audio device", > > they would have to be in the _sndiop group or be root. > > > > I don't think that's the intended meaning: before the change, > > a user program (such as sox(1)) could play directly to the device > > when sndiod -a off was not using it. Now it can't. > > The current wording seems to be a relict. > > This is the sndiod page. It is describing the behaviour of the sndiod. > It is describing how it opens and closes devices. > > Does it still open and close devices that way? > > I'm not talking about whether someone use it. Obviously someone as > root can rely on this open or close behaviour, if the open and close > behaviour code is still there.
OK, got it; thanks. Jan
