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From: Rob Landley <rob@landley.net>
Subject: Re: [Qemu-devel] Missing system calls retries in case of EINTR
Date: Wed, 11 Jul 2007 13:04:33 -0400
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To: Yigael Fleishman <igal.fl@gmail.com>
Cc: qemu-devel@nongnu.org, frederic.roussel@access-company.com

Talking about sigaction(SA_RESTART) vs looping around -EINTR everywhere:

On Tuesday 10 July 2007 8:57:34 pm Yigael Fleishman wrote:
> Rob,
> Thanks, that should also work.
> Seems do_sigaction() in linux-user/signal.c has some code which does that
> (though obviously not for the signal that I'm receiving).
> Any idea why SA_RESTART calls are not invoked by default to restart
> syscalls for all signals?

Fallout from old 1980's-era Unixes that didn't implement SA_RESTART, 
basically.  Standards like SUSv3 say to humor them, because they paid for the 
standard...

http://www.ussg.iu.edu/hypermail/linux/kernel/0507.1/1065.html

> --Yigael

Rob
-- 
"One of my most productive days was throwing away 1000 lines of code."
  - Ken Thompson.