file.c: use filesystem encoding

* file.c (rb_realpath_internal): use filesystem encoding if the
  argument is in ASCII encodings.
* win32/file.c (rb_readlink): needs the result encoding.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51738 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 20 insertions, 0 deletions

diff --git a/test/ruby/test_file.rb b/test/ruby/test_file.rb
index 8335b78760..d7507b4661 100644
--- a/test/ruby/test_file.rb
+++ b/test/ruby/test_file.rb
@@ -258,6 +258,26 @@ class TestFile < Test::Unit::TestCase
     }
   end
 
+  def test_realpath_encoding
+    fsenc = Encoding.find("filesystem")
+    nonascii = "\u{0391 0410 0531 10A0 05d0 2C00 3042}"
+    tst = "A"
+    nonascii.each_char {|c| tst << c.encode(fsenc) rescue nil}
+    Dir.mktmpdir('rubytest-realpath') {|tmpdir|
+      realdir = File.realpath(tmpdir)
+      open(File.join(tmpdir, tst), "w") {}
+      a = File.join(tmpdir, "a")
+      File.symlink(tst, a)
+      assert_equal(File.join(realdir, tst), File.realpath(a))
+      File.unlink(a)
+
+      tst = "A" + nonascii
+      open(File.join(tmpdir, tst), "w") {}
+      File.symlink(tst, a)
+      assert_equal(File.join(realdir, tst), File.realpath(a.encode("UTF-8")))
+    }
+  end
+
   def test_realdirpath
     Dir.mktmpdir('rubytest-realdirpath') {|tmpdir|
       realdir = File.realpath(tmpdir)