Good question, particularly as that differs from man 1 mkdir on both Linux and BSD. Perhaps we should ask Larry? 

a0d0e21e (Larry Wall 1994-10-17 23:00:00 +0000 1356) =item mkdir FILEN
+AME,MODE

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Jim Keenan

In reply to Re: mkdir in perldoc by jkeenan1
in thread mkdir in perldoc by QM

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