[tex-live] (Win32) Another problem with space in %COMSPEC%?

[T T]

2009/9/3 Norbert Preining <preining at logic.at>:
> On Do, 03 Sep 2009, Dan Luecking wrote:
>> tlmgr.pl which in turn calls
>>   TeXLive::TLUtils::dir_writable
>> which, in turn tries to execute
>>   system('copy /b ' . $ENV{'COMSPEC'} . ' "' . $fb . '" >nul 2>&1');
>> This seems to fail if there is a space in %COMSPEC%.
>
> Tomek, didn't we have a discussion about that recently? Is there a
> safe way to fix it, and if yes, can you please commit a fix.

I swapped 'nul' for $ENV{'COMSPEC'} in the above. This will create an
empty file. However, with folder virtualization disabled by
perl.exe.manifest, why don't we perform the write test the same way as
on Unix?

Cheers,

Tomek