IOUtil: abort IOUtil_TruncateOutputFiles if called too early

currently when called before the grid extension for IOUtil has been registered
(which is when IOUtils learns if the is a checkpoint recovery run or not), the
routine returns -1. However the documentation in the thorn guide states that

Thorn IOUtil provides an aliased function for other I/O thorns to call:
  CCTK_INT FUNCTION IO_TruncateOutputFiles (CCTK_POINTER_TO_CONST IN cctkGH)
This function simply returns 1 or 0 if output files should or should not be
truncated.

Since there are thorns out there that take this to heart and test for
IO_TruncateOutputFiles() being true (ie non-zero) these thorns always overwrite
data during a recovery when calling IOUtils too early. This happened to Carpet
in ticket #908.

The attached patch makes IOUtil abort instead which seems better than silently
returning the wrong (since undocumented) answer. No actual user thorn should be
affected.


git-svn-id: http://svn.cactuscode.org/arrangements/CactusBase/IOUtil/trunk@289 b32723a9-ab3a-4a60-88e2-2e5d99d7c17a

0 files changed, 0 insertions, 0 deletions