patch to add getopt parsing to expr

[Joerg Sonnenberger]

On Tue, Jan 20, 2009 at 11:01:33AM -0500, Joe Talbott wrote:
> On Tue, Jan 20, 2009 at 04:52:45PM +0100, Joerg Sonnenberger wrote:
> > On Tue, Jan 20, 2009 at 10:18:37AM -0500, Joe Talbott wrote:
> > > Since POSIX requires arguments beginning with '-' to be options
> > > shouldn't the following result in an error?
> > 
> > No. POSIX only says that -- has to be supported to disable the use of
> > options. It doesn't say that options have to be used.
> 
> What about this?
> 
>     Guideline 14:
>         If an argument can be identified according to Guidelines 3 through
>         10 as an option, or as a group of options without option-arguments
>         behind one '-' delimiter, then it should be treated as such.

Doesn't apply. SUS leaves it open whether or not expr supports options.
It does require expr to support --. Consider "expr -1".

Joerg