That solution works fine for the use case where each user has a network based
home directory and needs to run R from there, but doesn’t help with my
situation. I need to be able to support arbitrary network based paths in
arbitrary numbers – so mapping drives isn’t an option. I have found a
workaround using symbolic links to the network share created within the
temporary folder, but would much prefer that R support UNC paths – it seems a
reasonably simple fix.
Cheers
Pete
On 17/01/2018, 10:52, "Peter Dalgaard" <pd....@cbs.dk> wrote:
I usually draw a complete blank if I try to assist our IT department with
such issues (we really need better documentation than the Admin manual for
large-system installs by non-experts in R).
However, it is my impression that there are also options involving
environment variables and LFS naming. E.g., map the networked user directory
to, say, a P: "drive" and make sure that the environment is set up to reflect
this.
-pd
> On 16 Jan 2018, at 17:52 , Joris Meys <jorism...@gmail.com> wrote:
>
> Hi all,
>
> I ran into this exact issue yesterday during the exam of statistical
> computing. Users can install packages in a user library that R tries to
> create automatically on the network drive of the student. But that doesn't
> happen as the unc path is not read correctly, leading to R attempting to
> create a local directory and being told it has no right to do so.
>
> That is an older version of R though (3.3), but I'm wondering whether I
> would ask our IT department to just update R on all these computers to the
> latest version, or if we have to look for another solution.
>
> Cheers
> Joris
>
> On Mon, Jan 8, 2018 at 1:43 PM, Thompson, Pete <pete.thomp...@iqvia.com>
> wrote:
>
>> Hi, I’d like to ask about bug 17159:
>>
>> https://bugs.r-project.org/bugzilla/show_bug.cgi?id=17159
>>
>> I can confirm that I see exactly this bug when using dir.create on paths
>> of UNC form (\\server\share\xxx), with the recursive flag set. I’m seeing
>> this when attempting to use install.packages with such a path (which I
know
>> isn’t supported, but would be great if it was!). I can see that a patch
has
>> been suggested for the problem and from looking at the source code I
>> believe it’s a correct fix. Is there a possibility of getting this patch
>> included?
>>
>> The existing logic for Windows recursive dir.create (platform.c lines
>> 2209-22203) appears to be:
>> - Skip over any \\share at the start of the directory name
>> - Loop while there are pieces of directory name left (i.e. we haven’t hit
>> the last \ character)
>> = Find the next portion of the directory name (up to the next \
>> character)
>> = Attempt to create the directory (unless it is of the form x: - i.e. a
>> drive name)
>> = Ignore any ‘already exists’ errors, otherwise throw an error
>>
>> This logic appears flawed in that it skips \\share which isn’t a valid
>> path format (according to https://msdn.microsoft.com/en-
>> us/library/windows/desktop/aa365247(v=vs.85).aspx ). Dredging my memory,
>> it’s possible that \\share was a supported format in very old versions of
>> Windows, but it’s been a long time since the UNC format came in. It’s
also
>> possible that \\share is a valid format in some odd environments, but the
>> UNC format is far more widely used.
>>
>> The patch suggested by Evan Cortens is simply to change the skip logic to
>> skip over \\server\share instead of \\share. This will certainly fix the
>> common use case of using UNC paths, but doesn’t attempt to deal with all
>> the more complex options in Microsoft’s documentation. I doubt many users
>> would ask for the complex cases, but the basic UNC format would be of
wide
>> applicability.
>>
>> Thanks
>> Pete Thompson
>> Director, Information Technology
>> Head of Spotfire Centre of Excellence
>> IQVIA
>>
>>
>>
>>
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>
>
>
> --
> Joris Meys
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>
> Department of Data Analysis and Mathematical Modelling
> Ghent University
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