perldoc -f chown

from which...

chown LIST
               Changes the owner (and group) of a list of files.  The 
+first
               two elements of the list must be the numeric uid and gi
+d, in
               that order.  A value of -1 in either position is interp
+reted by
               most systems to leave that value unchanged.  Returns th
+e number
               of files successfully changed.

                   $cnt = chown $uid, $gid, 'foo', 'bar';
                   chown $uid, $gid, @filenames;
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You might even be served well to read the whole thing.