[R] Unlink a directory with leading and trailing space
Prof Brian Ripley
ripley at stats.ox.ac.uk
Wed Jan 4 14:49:21 CET 2006
On Wed, 4 Jan 2006, Duncan Murdoch wrote:
> On 1/3/2006 11:01 AM, Mike White wrote:
>> Using paste without defining a separator to generate a directory name for
>> dir.create, I have inadvertently created a directory with a leading and
>> trailing space. I cannot now delete this directory with unlink or from
>> Windows explorer. Any help deleting this directory would be appreciated.
> What name did you end up with? I don't have any problem removing the
> directory " test " just by right-clicking and choosing Delete. You can
> also open a command window, and put the name in quotes, e.g.
> rmdir " test "
But AFAICS Windows always drops trailing spaces.
> dir.create(" test ")
 " test"
and similarly at the command prompt.
> I do see the problem in unlink().
Which in turn is a problem in MSVCRT's _rmdir. The usual trick here is
to use short path names instead, and that works e.g.
R-devel has a shortPathName() function, so you could do
unlink(shortPathName(" test "), recursive = TRUE)
(but I've now fixed the source code to use the short name).
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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