date problem with ls -la --time=ctime

[Rainer Traut <tr ml gmx de>]

Hi,

we are running Domino 6.53 on el3 u4.
Due to the way domino's java detachs and attachs file from the databases
we see many tmp files in our tmp dir.
We haven't found a way around so far other than deleting them via a cron 
job.

I wanted to run this every two hours, delete all tmp files not accessed 
within the last 15 minutes.

Here is the strange behaviour:

[root asp5 tmp]# ls -la /tmp/eo-1528902312tm
-rw-rw-r--    1 notes    notes      628155 15. Apr 15:49 
/tmp/eo-1528902312tm
[root asp5 tmp]# ls -la /tmp/eo-1528902312tm --time=status
-rw-rw-r--    1 notes    notes      628155 18. Apr 12:34 
/tmp/eo-1528902312tm
[root asp5 tmp]# ls -la /tmp/eo-1528902312tm --time=atime
-rw-rw-r--    1 notes    notes      628155 18. Apr 12:39 
/tmp/eo-1528902312tm
[root asp5 tmp]# ls -la /tmp/eo-1528902312tm --time=access
-rw-rw-r--    1 notes    notes      628155 18. Apr 12:39 
/tmp/eo-1528902312tm
[root asp5 tmp]# ls -la /tmp/eo-1528902312tm --time=use
-rw-rw-r--    1 notes    notes      628155 18. Apr 12:39 
/tmp/eo-1528902312tm
[root asp5 tmp]# ls -la /tmp/eo-1528902312tm --time=ctime
-rw-rw-r--    1 notes    notes      628155 18. Apr 12:34 
/tmp/eo-1528902312tm
[root asp5 tmp]#

Question is, what time does ls -la show?
The man page says 'change time', so ctime?

Thanks
Rainer