Experimental Physics and Industrial Control System
Subject: |
Re: use VxWorks task to load databases |
From: |
[email protected] (Jim B. Kowalkowski) |
Date: |
Fri, 7 Apr 1995 07:18:32 -0500 |
Johnny,
>
> 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
> . . .
> . . . . . .
>
> Let me know how do you think about this.
>
It could work like this without to much trouble:
------------------------------------------------
# startup file for all the iocs
ld < epics/iocCore
ld < epics/drvSup
ld < epics/recSup
ld < epics/devSup
ld < epics/seq
.
.
.
dbLoad "default.dctsdr"
rcmd(xx,xx,xx,xx,"make_pattern_file")
dbLoadTemplate "the_pattern_file"
.
.
.
iocInit
------------------------------------------------
Where make_pattern_file is a script that runs on the workstation that
looks like this:
------------------------------------------------
#!/bin/sh
if [ -e the_pattern_file ]
then
exit 0
fi
find $app_top -name "*.db" -print |
awk '{ print "file " $1 }' > the_pattern_file
------------------------------------------------
The pattern file could now be user directly by dbLoadTemplate(). The
file the_pattern_file would look something like this:
file ../theApp/Db/my.db
file ../theApp/Db/another.db
file ../theApp/Db/yetanother.db
file ../testApp/Db/my.db
file ../testApp/Db/another.db
.
.
.
I haven't tested this or anything, it's just an idea.
Jim
---------------
Jim Kowalkowski
Argonne National Laboratory
Advanced Photon Source
708/252-9410
[email protected]
[email protected]
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