Thank you for your response. I looked for $! and sure enough it is populated, but does not explain why it failed. 

$< = $> = 0;
        print "Could not setuid ".$<." error: $! \n" if ($<);
        POSIX::setuid(0) if ($<);
        print "Posix could not setuid either ".$<." error: $! \n" if (
+$<);

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It now produces: 
Could not setuid 500 error: Operation not permitted
Posix could not setuid either 500 error: Operation not permitted

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In reply to Re^2: Setuid script not working by druidmatrix
in thread Setuid script not working by druidmatrix

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