From f40c637794ebd9f20c56f51e3aa5c10130421754 Mon Sep 17 00:00:00 2001
From: nagachika <nagachika@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 23 Mar 2018 12:03:58 +0000
Subject: merge revision(s) 62607: [Backport #14557]

	file.c: realpath on special symlink

	* file.c (realpath_rec): fallback to symlink path when it is
	  accessible but the link target is not actual entry on file
	  systems.  [ruby-dev:50487] [Bug #14557]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@62903 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_file.rb | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'test')

diff --git a/test/ruby/test_file.rb b/test/ruby/test_file.rb
index 58a4240391..d0d6a0ebe2 100644
--- a/test/ruby/test_file.rb
+++ b/test/ruby/test_file.rb
@@ -284,6 +284,14 @@ class TestFile < Test::Unit::TestCase
     }
   end
 
+  def test_realpath_special_symlink
+    IO.pipe do |r, w|
+      if File.pipe?(path = "/dev/fd/#{r.fileno}")
+        assert_file.identical?(File.realpath(path), path)
+      end
+    end
+  end
+
   def test_realdirpath
     Dir.mktmpdir('rubytest-realdirpath') {|tmpdir|
       realdir = File.realpath(tmpdir)
-- 
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