Messages in this thread | | | Date | Mon, 8 Nov 1999 09:02:15 +0100 | From | Matthew Wilcox <> | Subject | Re: [PATCH] POSIX timers for 2.3.25 |
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On Sun, Nov 07, 1999 at 06:33:43PM +0100, Robert de Vries wrote: > On Sun, 7 Nov 1999, Matthew Wilcox wrote: > > > On Sun, Nov 07, 1999 at 05:59:12PM +0100, Robert de Vries wrote: > > > The siginfo structure is slightly changed. It moves si_value out of the > > > _rt part of the union. si_value is used both by _rt and _timer and must > > > map to the same field. > > > > You can't do this. You've just broken binary compatibility with any > > application that uses POSIX RT signals. I can't see a nice way of doing > > this though. Can anyone else? > > IMHO, NOT doing this now gives more problems that doing it "right" at this > point. I must admit I am not very comfortable with this change either, > but I don't see any other way, which is not kludgy. > I'm open to suggestions. I would really not have two _sigval's in two > structs in the same union. But then again, is it worth breaking a few > apps at this point?
If this _really_ needs doing then we need a PER_NEWLINUX, change the kernel internal structures to the way you want, then translate the structures to the appropriate form for old Linux binaries whenever delivering a signal. It'll be unpleasant.
-- Matthew Wilcox <willy@bofh.ai> "Windows and MacOS are products, contrived by engineers in the service of specific companies. Unix, by contrast, is not so much a product as it is a painstakingly compiled oral history of the hacker subculture." - N Stephenson
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