How to find all slaves of mysql master server

[vinod ora]

Is there any standard way to find all slaves of a master server?

From internet I found following approaches:

1st Approach:

Using 'show slave hosts', but it require --report-host and --report-port entry in config file.
Which require server restart, so we can not do that in production.


2nd Approach:
Using
'SELECT Host, STATE FROM information_schema.PROCESSLIST AS p WHERE p.command ='Binlog Dump';'

But it is looks like dirty(hack) way to find all slave of a master.


Please suggest if there any official way to find all slaves of a master server.