Re: [Valgrind-users] Suggested changes to corecheck/tests/sigkill.c

[Dan K. <da...@ke...>]

Matthew Emmerton wrote:
> I was reviewing the source to corecheck/tests/sigkill.c the other day and
> noticed some questionable code, namely:
> 
> a) setting errno = 0.  errno should never be set by user applications (as
> per SUSv3)

You may have misread the standard.  I just checked
http://www.opengroup.org/onlinepubs/007904975/functions/errno.html
and it says that no Unix library or system call will clear errno;
it doesn't say the app can't.  In fact, it suggests it's ok for
the app to:

"An application that needs to examine the value of errno to determine the error should
set it to 0 before a function call, then inspect it before a subsequent function call."

- Dan

-- 
Dan Kegel
http://www.kegel.com
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