Re: Subtle MM bug

From: Alexander Viro (viro@math.psu.edu)
Date: Thu Jan 11 2001 - 14:57:30 EST


On Thu, 11 Jan 2001, Stephen C. Tweedie wrote:

> > And how is that different from the current situation?
>
> It's not, which is the point I was making: COW doesn't actually solve
> the pthreads problem. Far better to do it in user space.

Oh, certainly. We need COW for completely unrelated reasons - suppose
you open() a file and then change your *ID. You definitely want credentials
on the opened file to stay unchanged.

Pthreads are non-issue as far as I'm concerned. I'ld rather avoid mixing
them with credentials' cache. BTW, what about *BSD implementations? Do
they change creds of all threads upon set*id(2)?

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