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Message-ID:  <537E212E.2030607@morningstar2.co.uk>
Date:         Thu, 22 May 2014 17:09:18 +0100
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From: Joseph Wright <joseph.wright@MORNINGSTAR2.CO.UK>
Subject: Reading from the system (pipe input)
To: LATEX-L@LISTSERV.UNI-HEIDELBERG.DE
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Envelope-To: <rainer.schoepf@GMX.NET>
Status: R

Hello all,

Currently, we have \ior_open:Nn for reading from a file, but no defined
interface for using the 'pipe' shell escape provided by pdfTeX. As we
forbid spaces in file names, something like

  \ior_open:Nn \g_some_ior {"|kpsewhich~-all~file.tex"}

fails with an error. A defined interface("\ior_pipe:Nn") has been
suggested
(http://chat.stackexchange.com/transcript/message/15666333#15666333).

Thoughts on the concept/naming/etc.? Note that this is opening a
pseudo-file so does need to be related in some way to \ior_open:Nn.
-- 
Joseph Wright