use File::Find;

find (\&doSomething,'.'); # Find stuff in curr dir, execute subroutine
+ do something on match.  (\&[name] is a subroutine pointer... )
exit(0); # not needed
sub doSomething{
  my $fn = $_; # also not needed but makes life easy
  if ((!(-d $fn)) && ($fn =~/tar$/i)){ # -d test not really necessary
    system("tar","-xvf",$fn); # May want to do a which tar if it doesn
+'t work ...
  }
}
[download]

undef$/;$mmm="J\nutsu\nutss\nuts\nutst\nuts A\nutsn\nutso\nutst\nutsh\
+nutse\nutsr\nuts P\nutse\nutsr\nutsl\nuts H\nutsa\nutsc\nutsk\nutse\n
+utsr\nuts";open($DOH,"<",\$mmm);$_=$forbbiden=<$DOH>;s/\nuts//g;print
+;
[download]