[Carpet] Carpet IO oddity

[Erik Schnetter]

On May 1, 2006, at 08:54:42, Wolfgang Kastaun wrote:

> Nevertheless it would be nice if Carpet could detect if files  
> (also .asc
> files) it creates are already there and issue a warning, or even  
> abort.

Yes, that would be nice in many cases.  However, many people rely on  
the fact that you can just re-start a simulation in an existing  
simulation and have Cactus overwrite all existing files.

We could, however, have the I/O subsystem (not the driver) check  
whether the output directory is empty when it is created.  A new  
parameter IO::require_empty_output_directory or  
IO::require_new_output_directory could be introduced for this.  This  
would be checked right after the call to IOUtil_CreateDirectory in  
IOUtil's Startup.c.

Thomas, the second case (requiring that the output directory does not  
yet exist) is easy to check.  But how does one check whether a  
directory is empty?

-erik

-- 
Erik Schnetter <schnetter at cct.lsu.edu>

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