[tpm] IO::Handle not catching errors

[Madison Kelly]

Indy Singh wrote:
> If the shell process exits with a non-zero status, the return value will
> be found in $?.  You might need to call close first before you check $?.
> 
> A non-zero return code will not be an an IO error.  IO errors are not
> very likely and I'm not sure if it is useful to worry about them.
> 
> An error in starting the shell process will be caught by the open call.
> 
> Indy Singh

Doh!

   I went at this looking for too complex a solution. I will check that 
as soon as I get into the office in a couple hours and report back to 
the list "for the record". Thanks!

Madi