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From: Taco Hoekwater <taco@elvenkind.com>
Newsgroups: gmane.comp.tex.context
Subject: Re: Create a directory using tex
Date: Wed, 30 Aug 2006 08:45:53 +0200
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Xref: news.gmane.org gmane.comp.tex.context:30584
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Aditya Mahajan wrote:
> Can I ask TeX to check if a directory exists or is writable.

I do not think so.

And on second thought: not even \write18 will work always, because
whether or not TeX can write a file (in a subdir or even in the
local directory) depends in part on settings in texmf.cnf that
are not visible outside TeX.

Cheers, Taco