$root = $> == 0 ? 1 : 0;


##</code><code>##

$> = eval "use Win32" || ! $@ ? Win32::IsAdminUser() ? 1 : 0 : $>;
# or something like that
$root = $> == 0 ? 1 : 0;


##</code><code>##

$ perl -e '$> = 0; print "$!\n"; print "$>\n"'
Operation not permitted
501
$


##</code><code>##

$ perl -e 'use Win32;print Win32::IsAdminUser(),"\n";$>=0; print $!,"\n"; print $>,"\n"'
1
Invalid Argument
4638
$


##</code><code>##

$root = eval "use Win32" || ! $@ ? Win32::IsAdminUser() ? 1 : 0 : $> == 0 ? 1 : 0;


##</code><code>##

$,=42;for(34,0,-3,9,-11,11,-17,7,-5){$*.=pack'c'=>$,+=$_}for(reverse split//=>$*
){$%++?$ %%2?push@C,$_,$":push@c,$_,$":(push@C,$_,$")&&push@c,$"}$C[$#C]=$/;($#C
>$#c)?($ c=\@C)&&($ C=\@c):($ c=\@c)&&($C=\@C);$%=$|;for(@$c){print$_^$$C[$%++]}