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<== Date ==> <== Thread ==>
Subject: Re: list all process variables
From: Noboru Yamamoto <[email protected]>
To: Patrick Thomas <[email protected]>
Cc: epics Techtalk <[email protected]>
Date: Sun, 13 Sep 2009 14:26:12 +0900 
Hi,

Patrick Thomas wrote:
> Hi,
>
> I was wondering if there was anyway to get a list of all the process
> variables currently loaded in all the IOCs. I read that when a request
> for a particular process variable is made, each IOC gets the request and
> has to look in its databases to see if it contains it. Is it possible to
> instead have it return all the process variables it does have?
>
> I was also wondering if anyone has had trouble getting the sound to work
> when compiling the alarm handler on Linux?
>
> Thank you,
> Patrick
A thread in TechTalk titled "Listing channels” by David Dudley dated May 06, 2008 and responces may also help you. 

In these responces, I reporeted my device support for waveform record:
devWfDbRecfection
1. A device support for waveform record. It get a list of record types/fields of specified record/name of reocrds from EPICS DB using dbStaticLib. 2.Now Supports CHAR and UCHAR as FTVL. It returns comma separated list of informaiont as char array.(2009.3.20) 
and tar.gz file is available at:
  http://www-acc.kek.jp/EPICS_Gr/products/Records/DbReflectionApp.tgz
To achieve your goal, you need to install records using this device support in ALL IOCs you have. 

Alternatively,
You can use dbDumpRecord and dbDumpRecorType commands,or just "dbl", in iocsh to dump those information to a file. Again you need to add these command(s) in every st.cmds in your system.
If you can safely assume you know the location of all start-up command files of running IOC, a PV Crawler can find all records in your system. 
In this case, we also assume that database files used in the start up
commands have not changed since last reboot of IOCSH.
Anyway, It is interesting that this kind of question raised several times in TechTalk, and several different solutions were shown. Doesn't it means we need to do something in the Collaboration, "provide FAQ on this subject" or "Define new protocol 
to retrieve these information" for examples?

Regards,

Noboru Yamamoto
J-PARC control group/J-PARC center(KEK & JAEA)
EPICS group/KEK
JAPAN
Replies:
Re: list all process variables quock
References:
list all process variables, linux alarm handler Patrick Thomas
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