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SubjectRe: Per-instance devpts
On Fri, Aug 01, 2008 at 11:12:21AM -0700, H. Peter Anvin wrote:
> 2. Permissions on /dev/ptmx would not be persistent, and would have to
> be set via devpts mount options (unless they're 0666 root.tty, which
> would presumably be the default.)

On Debian based systems /dev/ptmx is 0666 root.root. But the gid of tty
is already supplied for devpts.

> I worry #1 would have substantial user-space impact, but I don't see a
> way around it, since there would be no obvious way to associate
> /dev/ptmx with a filesystem.

Hmm. Several possibilities:
- Change the filesysteme name and the old name remains usable with
/dev/ptmx.
Problem: You could mount the filesystem with the old name within a
container.
- Make the first mounted one special.
Problem: Will not survive a umount/mount cycle. But this would be not
the case anyway.

But you are sure, none of them is a pretty solution.

Bastian

--
I'm a soldier, not a diplomat. I can only tell the truth.
-- Kirk, "Errand of Mercy", stardate 3198.9


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