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Re: glibc-bsd questions

Hi Steven,

2012/6/25 Steven Chamberlain <steven@pyro.eu.org>:
> Do we define SIGCANCEL as __SIGRTMIN?

No, you're looking at the wrong code.  Our SIGCANCEL definition is in

> If so, having redefined __SIGRTMIN from 32 to the awkward number 65,
> does that not cause problems when trying to mask it?

It shouldn't. For us SIGCANCEL is a constant number (33).

> "At least inside __start_helper_thread __sigprocmask() should be used"
> Does it matter that sigprocmask actually got used and not __sigprocmask?

Functionally it doesn't matter.  It's just a linking detail (private
symbol vs public symbol).

>  Maybe they are the same thing.  But I suspect there is/was an
> implementation of that function which refuses to block SIGCANCEL (same
> as pthread_sigmask), and another one that does.

Why do you think that?  AFAIK both are kernel call stubs.

Robert Millan

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