How can I get the postion of binlog from binlogfile?

When there are several sql in a transaction, it is not executed, I am interrupted, name I am inaccurate when I re-read the current binlog position next time, how can I judge?

The issue does not name any files, tests, or entry points. First clarify how interrupted multi-statement transactions should be resumed and which binlog position is expected, then inspect the MySQL binlog position and transaction-handling paths. Done means the correct resume position can be determined reliably after interruption, with a reproducible test or documented behavior.

Written by the indexing model from the issue text.