bug#23564: Unexpected results from `ln --symbolic --interactive --relative`

[Pádraig Brady]

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On 17/05/16 10:56, Florian Schweiger wrote:
> Hi,
>
> I've noticed the following unexpected behaviour in `ln` which appears to
> be a bug. I'm referring to the attached MWE Bash script
> test_ln-symbolic-interactive-relative.sh.
>
> When run, it creates a directory "test_dir" and a file "test_file" in
> the current working directory. Then it tries to create a relative,
> symbolic link to the file in said directory. When the "--interactive"
> option is present, this operation fails every other time in that it
> overwrites the existing link with an unreachable target.
>
> DETAILED DESCRIPTION:
>
> * First invocation
>       $ ./test_ln-symbolic-interactive-relative.sh
>       ln -sirv test_file test_dir/test_link
>       ‘test_dir/test_link’ -> ‘../test_file’
> * Second invocation:
>       $ ./test_ln-symbolic-interactive-relative.sh
>       ln -sirv test_file test_dir/test_link
>       ln: replace ‘test_dir/test_link’? y
>       ‘test_dir/test_link’ -> ‘test_file’
> * Third invocation:
>       $ ./test_ln-symbolic-interactive-relative.sh
>       ln -sirv test_file test_dir/test_link
>       ln: replace ‘test_dir/test_link’? y
>       ‘test_dir/test_link’ -> ‘../test_file’
>
>
> AFFECTED SYSTEM:
>       * ln (GNU coreutils) 8.21
>       * GNU bash, version 4.3.11(1)-release (x86_64-pc-linux-gnu)
>       * Ubuntu 14.04.4 LTS

This was fixed in V8.22 with:
http://git.sv.gnu.org/gitweb/?p=coreutils.git;a=commitdiff;h=v8.21-27-ge52293a

thanks,
Pádraig