How do you show sourcetype of a monitor on a Universal Forwarder 5.0.4 via CLI

[myou]

I set a source override for a monitor in Splunk version 5.0.4
Example: splunk add monitor /var/log/maillog-in -sourcetype postfix_syslog

I would like to be able to see that it was successful via the CLI
'splunk list monitor /var/log/maillog-in' does not provide the details.

[myou]

There does not appear to be a way to do this via cli yet. However the information can be shown via a REST point.

https://localhost:8089/services/admin/inputstatus/TailingProcessor:FileStatus