users file and "!*" comparisons

[Daniel Larsson]

On Tue, 2007-08-07 at 13:33 -0400, Alan DeKok wrote:
> Daniel Larsson wrote:
> > I've encountered an unintuitive behaviour in the users file processing .
> > I wanted to do something similar to:
> > 
> > DEFAULT Some-Attr !* "", Other-Attr !* ""
> >         ...
> > 
> > I.e. if neither "Some-Attr" nor "Other-Attr" is present, it should
> > match.
> 
>   No.  That is not the way it's documented.  See "man users".  Each item
> in the check list is ANDed.  What you wrote is:
> 
>   Some-Attr doesn't exist AND some other attribute doesn't exist.
> 
>   If Some-Attr *does* exist, the first check fails, and the next one
> isn't even looked at.

The second one isn't looked at in any case. Even if Some-Attr does *not*
exist, the check returns false immediately, regardless of the presence
of Other-Attr.

> 
> > Before I try to patch this, is this intended for some reason?
> 
>   It's both intended and documented.
> 
>   If you want more complex comparisons, see the CVS head.  There, you
> can do:
> 
>   if (!Some-Attr || !Other-Attr) ...
> 
>   Which is what you seem to want.

No, perhaps my wording was confused. I wanted a match if neither was
present.

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