Experimental Physics and
Industrial Control System

Andrew Johnson via Core-talk <core-talk at aps.anl.gov> · Mon, 01 Mar 2021 04:01:01 -0000

** Changed in: epics-base
       Status: In Progress => Fix Committed

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https://bugs.launchpad.net/bugs/1908305

Title:
  Default DTYP can be changed by DBD file order

Status in EPICS Base:
  Fix Committed

Bug description:
  Kay Kasemir reported:

  I was always silently expecting that a record from a *.db file that
  doesn't specifically list the DTYP would default to "Soft Channel".
  Example:

  record(ai, "XXX")
  {
    field(INP, "SomeOtherRecord")
  }
  just works because the field DTYP="Soft Channel" is the default.

  Now I notice that at least with R7.0.3.1, the default is not "Soft
  Channel" but whatever is listed first in the *.dbd file. If that file
  looks like this:

  device(ai, CONSTANT, devAiSoft, "Soft Channel")
  device(ai, INST_IO, devAiXXXX, "MyDeviceSupport")

  then the default for an ai record DTYP is indeed "Soft Channel".

  But if I put "MyDeviceSupport" on top, that becomes the default, as
  can happen when you change the order of XXX_DBD file entries in the
  Makefile.

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System