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RE: Interrupted System Call EINTR on Solaris

Subject: RE: Interrupted System Call EINTR on Solaris
Date: Tue, 4 Apr 2006 16:27:00 +0100

Hi Paul,

> You can look here for info:
> Look at the section "SA-non-RESTARTer?"  I've had conversations with
> knowledgeable people who claim that the POSIX guarantee for SA_RESTART
> is not as ironclad as one would assume, and that technically 
> Solaris is not violating the letter of the spec, so...

This is bad news.

Would it be possible that you (or your knowledgable friends) to knock up
a small test case illustrating this problem?  The reason I ask this is 
because we have a lot of influence with Sun - we're one of their largest
customers in the UK and there are several engineers permanently on site
here.  If this is a problem on Solaris 8 and worse Solaris 9 and 10 then
they should fix it.  If we raise it as a problem, then I'm sure it would
be looked at, particularly since it is non-POSIX.

Having said all that, if there are other systems that do not implement 
SA_RESTART properly, then I guess it is safer sticking with 'defensive
coding' techniques.  Nevertheless it would be still worth getting 
Sun to fix their O/S, as this might be causing problems for other apps.


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