Experimental Physics and
Industrial Control System

"Ben-chin K. Cha" <[email protected]> · Mon, 22 Nov 1999 11:52:12 -0600 (CST)

> 
> > I also use this " " to replace the NULL pvname if the user
> > mistakenly provided a NULL string for name search to an
> > interactive CA client. If I remember it right this will
> > avaoid the problem of core dump and accidentally get
> > out of the interactive CA client.
> 
>   I don't understand: if you're going to test for a zero-
> length string, why even bother making the CA function call 
> with name " " when you know it's going to fail?
> 

Sometimes we do want to have some legal 'NULL' string pvname,
e.g. in montitoring variable number of positioner and
detector pvnames in a scan record. It is intentionally as
a NULL string.

Ben-chin

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System