Re: Security question: "Text file busy" overwriting executables but not shared libraries?

Alexander Viro
2001-10-04T16:11:21Z

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".

> Trust me. The people who came up with MAP_COPY were stupid. Really. It's
> an idiotic concept, and it's not worth implementing.

Well, actually that's a concept that made sense on system we got mmap from[1]
They just want infection to be complete.

[1] cue Tom Lehrer singing "I got it from Agnes, she got it from Jim"