Re: [PATCH] compatibility syscall layer (let's try again)

george anzinger (george@mvista.com)
Fri, 06 Dec 2002 12:33:39 -0800


Jim Houston wrote:
>
> Linus Torvalds wrote:
>
> Hi Linus,
>
> Sorry about my last message (which quoted everything but didn't add
> anything). I shouldn't try to answer email and talk on the phone at
> the same time.
>
> > It's been tested, and the only problem I found (which is kind of
> > fundamental) is that if the system call gets interrupted by a signal and
> > restarted, and then later returns successfully, the partial restart will
> > have updated the "remaining time" field to whatever was remaining when the
> > restart was started.
> >
>
> George's Posix timers patch sets the time remaining to zero in the
> success case. I think this is the right thing to do.
>
> I don't have a copy of the spec in front of me. IIRC, it says that you have
> to set the time remaining in the interrupted case. It says nothing
> about setting it on the success case. I would leave the lawyers out
> of writing software.
>
> I wish the IEEE would make the Posix specs available online for free.
> I gave the IEEE money for years...

Try: http://www.opengroup.org/onlinepubs/007904975/toc.htm

-- 
George Anzinger   george@mvista.com
High-res-timers: 
http://sourceforge.net/projects/high-res-timers/
Preemption patch:
http://www.kernel.org/pub/linux/kernel/people/rml
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