Monitor rman backup progress - oracle database script

SELECT SID,
       SERIAL#,
       CONTEXT,
       SOFAR,
       TOTALWORK,
       ROUND(SOFAR/TOTALWORK*100, 2) "%_COMPLETE"
FROM V$SESSION_LONGOPS
WHERE OPNAME LIKE 'RMAN%'
  AND OPNAME NOT LIKE '%aggregate%'
  AND TOTALWORK != 0
  AND SOFAR <> TOTALWORK;