Alan asked:
> But why do people go to the
> effort of confusing readers by using "^" instead of "!="? 

My guess - eor (^) was quicker than not-equal (!=) on a PDP-11.

That code fragment for checking uid's has been around a -long-
time, if my memory serves me.

It's gotten to be like the infamous "!!" boolean conversion
operator, a bit of vernacular that would be harder to read if
recoded using modern coding style.

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@sgi.com> 1.925.600.0401
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