Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  <19961997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  Index 1994  1995  <19961997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020 
<== Date ==> <== Thread ==>

Subject: Channel access security
From: frl@aps.anl.gov (Frank Lenkszus)
To: tech-talk@aps.anl.gov
Date: Tue, 12 Mar 1996 15:18:23 -0600
I've come across a situation in which I have 20 iocs, each of which will have
a unique access security group with access conditioned on a local process 
variable. The form of the 20 access security rules is the same. I have 2 choices
for handling this. Create 20 unique files each with a single access group, or
create 1 file that includes all 20 access groups. The first option's 
disadvantage is it requires 20 files. The second's disadvantage is that each
ioc will create a channel access connection to the 19 pv's that are not local 
even though the rules invoking those pvs are never used in the that ioc.
Not a pleasant thought. In this case, I'd get 19x20 or 380 superfluous channel
access connections. Sooo, for now, I'll just create a template and use subtool
it create 20 access security files.

It would have been real handy though, if asSetFilename supported macro 
substitution. If that were so, I could defer macro substitution to the
start up command files.  Anyway, I suggest that some future incarnation of
asSetFilename support macro substitution.  Comments?


Frank


Navigate by Date:
Prev: vxWorks stat through EPICS records Jim B. Kowalkowski
Next: Bug in OMS Driver routines Guy Jennings
Index: 1994  1995  <19961997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020 
Navigate by Thread:
Prev: vxWorks stat through EPICS records Jim B. Kowalkowski
Next: Bug in OMS Driver routines Guy Jennings
Index: 1994  1995  <19961997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020 
ANJ, 10 Aug 2010 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·