Re: aSub debug output

[Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov>]

On 12/2/20 3:19 PM, Johnson, Andrew N. wrote:
> I don’t think Evan needs to set MSI for the record to go into an INVALID/LINK alarm state if one or more of the links isn’t connected, that should be happening anyway. This example uses a subRecord but the same rules apply, the subroutine isn’t called if any of the input links aren’t connected:
> 

Ok, I see.  I was only looking at dbCaGetLink() in dbCa.c, where recGblInheritSevr() is called,
which is a no-op unless one of the MS modifiers is present.  Of course a disconnected link
will always 'return -1', which triggers the calling dbGetLink() in dbLink.c to raise LINK_ALARM.

https://github.com/epics-base/epics-base/blob/dc99d63df8af0d6adacc8425741ce128fb28160f/modules/database/src/ioc/db/dbCa.c#L449

https://github.com/epics-base/epics-base/blob/dc99d63df8af0d6adacc8425741ce128fb28160f/modules/database/src/ioc/db/dbLink.c#L332