Issue #16756 has been reported by vo.x (Vit Ondruch).

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Bug #16756: File.chmod does not work on links.
https://bugs.ruby-lang.org/issues/16756

* Author: vo.x (Vit Ondruch)
* Status: Open
* Priority: Normal
* Assignee: Eregon (Benoit Daloze)
* ruby -v: ruby-2.8.0-810d66f3e7
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
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Now I observe different error after fix of #16749:


~~~
1)
File.lchmod changes the file mode of the link and not of the file ERROR
Errno::ENOTSUP: Operation not supported @ apply2files - /builddir/build/BUILD/ruby-2.8.0-810d66f3e7/rubyspec_temp/32136/359-file_chmod_test.lnk
/builddir/build/BUILD/ruby-2.8.0-810d66f3e7/spec/ruby/core/file/lchmod_spec.rb:21:in `lchmod'
/builddir/build/BUILD/ruby-2.8.0-810d66f3e7/spec/ruby/core/file/lchmod_spec.rb:21:in `block (3 levels) in <top (required)>'
/builddir/build/BUILD/ruby-2.8.0-810d66f3e7/spec/ruby/core/file/lchmod_spec.rb:3:in `<top (required)>'
~~~

It seems that glibc 2.31.9000 does not support lchmod above links. May be I should rather report this against glibc? Not sure ...



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