Re: fcntl error

[Andreas Schwab]

Linus Torvalds <torvalds@xxxxxxxx> writes:

> On Thu, 18 Mar 2004, David Howells wrote:
>> 
>> The attached patch fixes a minor problem with fcntl.
>
> I agree that it is a cleanup, but I disagree on the "problem" part.
>
>> get_close_on_exec() uses FD_ISSET() to determine the fd state. However,
>> FD_ISSET() does not return 0 or 1 on all archs. On some it returns 0 or non-0,
>> which is fine by POSIX.
>
> FD_ISSET() is broken if it returns anything but 0/1, in my not-so-humble 
> opinion.

POSIX clearly says that _any_ non-zero value is ok, similar to the ctype.h
functions.  Of course, the kernel can set different standards internally.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@xxxxxxx
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