Subject: |
Re: use VxWorks task to load databases |
From: |
Johnny Tang <[email protected]> |
Date: |
Thu, 6 Apr 95 14:12:16 EDT |
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Johnny Tang Voice: (804)249-7239 E-Mail: [email protected]
Continous Electron Beam Accelerator Facility
12000 Jefferson Avernue, MS 85A
Newport News, Va 23606
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Mailer: Elm [revision: 70.85]
Have you thought about using a VxWorks task to load databases
to ioc ? So that only one startup file is needed for all the iocs.
Also it will load what ever in the specified production tree so that
it will not be impacted by changes of products in the production
tree. It can be called "Dynamic Shared Directory Loading".
Say, I have a production tree like this:
<prod> ---- <ioc1> --- <app1> --- app1db1.database
| | app1db2.database
| | app1.o
| |- <app2> --- app2db1.database
| app2db2.database
| app2.o
| . . .
|
|- <ioc2> --- <app1> --- app1db1.database
| app1db2.database
| app1.o
|- <app3> --- app3db1.database
app3db2.database
app3.o
. . .
. . . . . .
And a startup like this:
# startup file for all the iocs
ld < epics/iocCore
ld < epics/drvSup
ld < epics/recSup
ld < epics/devSup
ld < epics/seq
ld < appDbLoadTask.o
sp appDbLdTask
The appDbLoadTask will do the following:
1. Read from Env Variable get the <prod> dir into $ProdDir
2. Get Ioc name and set to $CurrentIOCName
3. cd $(ProdDir)/$(CurrentIOCName)
4. For every <app> do
load all the *.database files and *.o file
Note: Wildcard may be configurable
5. do iocInit "resource.def"
6. do <app> record initial valus settings (dbpf)
7. taskdelete(taskIdSelf())
Note: one suggestion is step 4,5,6 can be implemented
as shell callable subroutine.
Let me know how do you think about this.
Regards,
Johnny Tang
CEBAF
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