Use the OBJECT_LOCK_INFO view. https://www.ibm.com/support/knowledgecenter/en/ssw_ibm_i_73/rzajq/rzajqviewobjlockinfo.htm.

If I run this for a display file that I am using.
SELECT LOCK_STATE,
LOCK_STATUS,
LOCK_SCOPE,
JOB_NAME,
OBJECT_TYPE
FROM QSYS2.OBJECT_LOCK_INFO
WHERE SYSTEM_OBJECT_NAME = 'IFSHCSURFM'
AND SYSTEM_OBJECT_SCHEMA = 'DRSUP';

I get this.
*SHRNUPHELDJOB679042/KEVIN/MN207A*FILE

If no one is in the file I get no records.

-----Original Message-----
From: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxxxxxxxx] On Behalf Of JRusling@xxxxxxxxxxx
Sent: Monday, January 28, 2019 2:00 PM
To: RPG programming on the IBM i(AS/400 and iSeries)
Subject: Re: How can i test, from rpg, if a display file is in use?

I have used similar method myself.

I'm creating an 'Unlock process' program.

The locked process has a data area that needs to be cleared -- so that another user may initiate/use the (locked) process.

I can do this easily from my 'Unlock process' program, but . . .

My thought was to further insure that the process wasn't really in use...
i could see if the display file, used to initiate it, was open/in use.
(i was thinking that should be fairly easy to do)

The process that gets locked is only ever rarely actually locked.

Why it happens --
A user either exits the 5250 session abnormally or stays signed on so long that the nightly backup kicks their session off.

It would probably just be easier to throw a job in, at the end of nightly backups, to clear the data area.

Thanks Jose,

John


<snip>
Another way I have seen is people sometimes use a data area with a flag when screen open flag equal 1 and then all programs using this screen check that flag in this dtaarea.

On Mon, Jan 28, 2019, 2:14 PM Jose Perez <joseenocperez.jp@xxxxxxxxx
wrote:
</snip>
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