ASM lsof with process ID

 Oracle ASM can list files which belong to a (current active) instance. 

The command is lsof. Unfortunately it does not provide the process-ID which holds the file open. lsof gets the data from internal view X$KFFOF, which contains additional information.

Based on all I found (which is close to nothing) I can provide this SQL - might it help, to find the holder of an open AMS file form now on.

SELECT lsof.GROUP_KFFOF        as GROUP_NUMBER
     , lsof.NUMBER_KFFOF       as FILE_NUMBER
     , lsof.INSTANCENAME_KFFOF as INSTANCE_NAME
     , lsof.DBNAME_KFFOF       as DB_NAME
     , lsof.CLUSTERNAME_KFFOF  as CLUSTER_NAME
     , lsof.OSID_KFFOF         as OS_PID
     , lsof.PATH_KFFOF         as PATH
     , lsof.FLAGS_KFFOF        as FLAGS 
     , lsof.TIMESTAMP_KFFOF    as TIMESTAMP
FROM X$KFFOF lsof
WHERE 1=1
  AND bitand(flags_kffof, to_number('00004000', 'XXXXXXXX')) = 0  -- kffilf_invalid = 0x00004000
;