how to get the log-bin-index values in the mysql prompt?

[samana srikanth]

i can get the datadir of mysql
mysql> show variables like 'datadir';
+---------------+-----------------+
| Variable_name | Value |
+---------------+-----------------+
| datadir | /var/lib/mysql/ |
+---------------+-----------------+
1 row in set (0.00 sec)

mysql>


do we have similar kind or a query to get the mysql log-bin-index file name

thanks
Srikanth