Re: Does getopt() return "-1", or "EOF", at end?

On Wed, Jan 09, 2002 at 12:58:45PM -0500, Tom Lane wrote:
> I notice that in some places we compare the result of getopt(3) to
> "EOF", and in some other places we compare it to "-1".  I think we
> should standardize on one or the other; anyone have an opinion
> which it should be?
> 
> The man pages I have here (HPUX and Linux) both describe the
> end-of-switches return value as being "-1".  The glibc sources also
> use "-1".  Replacing this by EOF seems more readable but perhaps is
> not strictly correct.
> 
> Are there any platforms that define EOF as something other than -1?

OpenBSD's getopt(3):    The getopt() function was once specified to return EOF instead of -1.    This was changed by
IEEEStd1003.2-1992 (``POSIX.2'') to decouple    getopt() from <stdio.h>.
 

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