[tex-live] error on (after) texlive 2008 installation

[Heiko Oberdiek]

Hi Reinhard,

On Thu, Apr 16, 2009 at 12:40:32AM +0200, Reinhard Kotucha wrote:

> spaces are supported already:
> 
> $ touch foo\ bar\ baz.tex
> $ tex '\input "foo bar baz.tex"\bye'
> This is TeX, Version 3.1415926 (Web2C 7.5.7)
> (./foo bar baz.tex)
> No pages of output.
> Transcript written on "foo bar baz.log".

How can this feature be detected at TeX macro level in a robust
and easy way?
What's the specification of this syntax?

Yours sincerely
  Heiko <oberdiek at uni-freiburg.de>