+=head2 readdir
+
+ readdir dir
+
+This returns the list of directory entries in directory C<dir>.
+
+All entries in the directory are returned, including C<.> and
+C<..>. The entries are I<not> sorted, but returned in the same
+order as the underlying filesystem.
+
+This function is primarily intended for use by programs. To
+get a simple list of names, use C<ls>. To get a printable
+directory for human consumption, use C<ll>.
+