Messages in this thread |  | | Date | 04 Oct 2001 21:28:00 +0200 | From | (Kai Henningsen) | Subject | Re: Security question: "Text file busy" overwriting executables but no |
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viro@math.psu.edu (Alexander Viro) wrote on 04.10.01 in <Pine.GSO.4.21.0110041153560.28270-100000@weyl.math.psu.edu>:
> > On Thu, 4 Oct 2001, Linus Torvalds wrote: > > > In short, now you need filesystem versioning at a per-page level etc. > > *ding* *ding* *ding* we have a near winner. Remember, folks, Hurd had been > started by people who not only don't understand UNIX, but detest it. > ITS/TWENEX refugees. And semantics in question comes from there - > they had "open and make sure that anyone who tries to modify will get > a new version, leaving one we'd opened unchanged".
Sounds to me like it could be done ... *if* you had per-process filesystem snapshot capability.
Of course, that's using ICBMs to swat mosquitos. I don't recommend it just for implementing a mmap() flag.
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