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               Creates the directory specified by FILENAME, with permi
+ssions
               specified by MASK (as modified by "umask").  If it succ
+eeds it
...
               or directory should be kept private (mail files, for in
+stance).
               The perlfunc(1) entry on "umask" discusses the choice o
+f MASK
               in more detail.

perl -e "umask 000; mkdir 'a', 0777";ls -ld a

$,=42;for(34,0,-3,9,-11,11,-17,7,-5){$*.=pack'c'=>$,+=$_}for(reverse s
+plit//=>$*
){$%++?$ %%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[$%++]}