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On Mon, Sep 04, 2006 at 11:20:45AM +0159, Jiri Slaby wrote:
> Hello,
>=20
> I have netbsd cdev driver. I do multiple opens (more instances) on it, is=
=20
> there any way to get know about each close of these instances?
>=20
> 'A' process does:
> open
> ioctl(START_IT) + others
> for (;;) {
> poll
> ioctl(LOCK_IT)
> read it by mmap
> ioctl(UNLOCK_IT)
> }
>=20
> ^C, so kernel calls close for it and releases A process' resources.
>=20
> If there is also process B, which does the very same thing, for first=20
> process killed there is no close call and kernel turns into ddb. I do nee=
d=20
> to know about all closes -- is there such a way?

Yes, make the device clonable, like e.g. tap(4) and bpf(4).

--=20
Quentin Garnier - cube@cubidou.net - cube@NetBSD.org
"When I find the controls, I'll go where I like, I'll know where I want
to be, but maybe for now I'll stay right here on a silent sea."
KT Tunstall, Silent Sea, Eye to the Telescope, 2004.

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