From karl.forner at gmail.com  Wed Sep 22 17:22:57 2010
From: karl.forner at gmail.com (Karl Forner)
Date: Wed, 22 Sep 2010 17:22:57 +0200
Subject: [Rd] Possible bug or annoyance with library.dynam.unload()
In-Reply-To: <4C98D038.8040507@gmail.com>
References: <AANLkTik-Spu2SEAZjB3kSY1YoWFUhUy3NZ5-g3WRw_i2@mail.gmail.com>
	<AANLkTimOnBLjWY9Qro88Pakd7_nTLibkqCkB1e=D7faQ@mail.gmail.com>
	<4C98D038.8040507@gmail.com>
Message-ID: <AANLkTimDqM3pdFH5-Ph9kW=CafapEt7aQB_4YjTC5+9X@mail.gmail.com>

Thanks Duncan for your suggestion.

I could not find any package using dynamic library, namespaces and not the
useDynLib pragma so
I created a minimalistic package to demonstrate the problem.
Please find attached a very small package foo (8.8k)

Steps to reproduce the problem:

* unarchive it ( tar zxvf foo_0.1.tar.gz )
* cd foo
* install it locally ( mkdir local; R CMD INSTALL -l local . )
* R
> library(foo, lib.loc="local/")
>.dynLibs()
# there you should be able to see the foo.so lib, in my case
/x05/people/m160508/workspace/foo/local/foo/libs/foo.so

> unloadNamespace("foo")
.onUnload, libpath= local/fooWarning message:
.onUnload failed in unloadNamespace() for 'foo', details:
  call: library.dynam.unload("foo", libpath)
  error: shared library 'foo' was not loaded

#The libpath that the .onUnload() gets is "local/foo".

#This fails:
>library.dynam.unload("foo", "local/foo")
Error in library.dynam.unload("foo", "local/foo") :
  shared library 'foo' was not loaded

# but if you use the absolute path it works:
>library.dynam.unload("foo", "/x05/people/m160508/workspace/foo/local/foo")

Karl

On Tue, Sep 21, 2010 at 5:33 PM, Duncan Murdoch <murdoch.duncan at gmail.com>wrote:

>  On 21/09/2010 10:38 AM, Karl Forner wrote:
>
>> Hello,
>>
>> I got no reply on this issue.
>> It is not critical and I could think of work-around, but it really looks
>> like a bug to me.
>> Should I file a bug-report instead of posting in this list ?
>>
>
> I'd probably post instructions for a reproducible example first.  Pick some
> CRAN package, tell us what to do with it to trigger the error, and then we
> can see if it's something special about your package or Roxygen or a general
> problem.
>
> Duncan Murdoch
>
>  Thanks,
>>
>> Karl
>>
>> On Thu, Sep 16, 2010 at 6:11 PM, Karl Forner<karl.forner at gmail.com>
>>  wrote:
>>
>> >  Hello,
>> >
>> >  I have a package with a namespace. Because I use Roxygen that
>> overwrites
>> >  the NAMESPACE file each time it is run, I use a R/zzz.R file with
>> >  an .onLoad() and .onUnload() functions to take care of loading and
>> >  unloading my shared library.
>> >
>> >  The problem: if I load my library from a local directory, then the
>> >  unloading of the package fails, e.g:
>> >
>> >  # loads fine
>> >  >library(Foo, lib.loc=".Rcheck")
>> >
>> >  >unloadNamespace("Foo")
>> >  Warning message:
>> >  .onUnload failed in unloadNamespace() for 'Foo', details:
>> >    call: library.dynam.unload("Foo", libpath)
>> >    error: shared library 'Foo' was not loaded
>> >
>> >  # I traced it a little:
>> >  >library.dynam.unload("Foo", ".Rcheck/Foo")
>> >  Error in library.dynam.unload("Foo", ".Rcheck/Foo") :
>> >    shared library 'Foo' was not loaded
>> >
>> >  # using an absolute path works
>> >  >library.dynam.unload("Foo", "/home/toto/.Rcheck/Foo")
>> >
>> >
>> >  So from what I understand, the problem is either that the relative
>> libpath
>> >  is sent to the .onUnload() function instead of the absolute one,
>> >  or that library.dynam.unload() should be modified to handle the
>> relative
>> >  paths.
>> >
>> >  Am I missing something ? What should I do ?
>> >
>> >  Thanks,
>> >
>> >
>> >  Karl
>> >
>>
>>        [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-devel at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-devel
>>
>
>
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[Rd] Possible bug or annoyance with library.dynam.unload()
Karl Forner