Make the test suite pass on real Android/Termux environment

Attempting to create a hard link raises EACCES

spec/ruby/core/file/link_spec.rb

@@ -13,7 +13,7 @@ describe "File.link" do
     rm_r @link, @file
   end
 
-  platform_is_not :windows do
+  platform_is_not :windows, :android do
     it "link a file with another" do
       File.link(@file, @link).should == 0
       File.should.exist?(@link)

spec/ruby/core/file/stat/nlink_spec.rb

@@ -11,7 +11,7 @@ describe "File::Stat#nlink" do
     rm_r @link, @file
   end
 
-  platform_is_not :windows do
+  platform_is_not :windows, :android do
     it "returns the number of links to a file" do
       File::Stat.new(@file).nlink.should == 1
       File.link(@file, @link)

spec/ruby/library/socket/socket/listen_spec.rb

@@ -34,8 +34,16 @@ describe 'Socket#listen' do
         @server.close
       end
 
-      it 'raises Errno::EOPNOTSUPP' do
-        -> { @server.listen(1) }.should raise_error(Errno::EOPNOTSUPP)
+      platform_is_not :android do
+        it 'raises Errno::EOPNOTSUPP' do
+          -> { @server.listen(1) }.should raise_error(Errno::EOPNOTSUPP)
+        end
+      end
+
+      platform_is :android do
+        it 'raises Errno::EACCES' do
+          -> { @server.listen(1) }.should raise_error(Errno::EACCES)
+        end
       end
     end
 

spec/ruby/shared/file/identical.rb

@@ -9,7 +9,11 @@ describe :file_identical, shared: true do
     touch(@file2) { |f| f.puts "file2" }
 
     rm_r @link
-    File.link(@file1, @link)
+    begin
+      File.link(@file1, @link)
+    rescue Errno::EACCES
+      File.symlink(@file1, @link)
+    end
   end
 
   after :each do

test/fileutils/test_fileutils.rb

@@ -72,8 +72,13 @@ class TestFileUtils < Test::Unit::TestCase
     end
 
     def check_have_hardlink?
-      File.link nil, nil
-    rescue NotImplementedError
+      Dir.mktmpdir do |dir|
+        Dir.chdir(dir) do
+          File.write "dummy", "dummy"
+          File.link "dummy", "hardlink"
+        end
+      end
+    rescue NotImplementedError, Errno::EACCES
       return false
     rescue
       return true

test/pathname/test_pathname.rb

@@ -345,9 +345,26 @@ class TestPathname < Test::Unit::TestCase
   def has_symlink?
     begin
       File.symlink("", "")
-    rescue NotImplementedError, Errno::EACCES
+    rescue NotImplementedError
       return false
     rescue Errno::ENOENT
+      return false
+    rescue Errno::EACCES
+      return false
+    end
+    return true
+  end
+
+  def has_hardlink?
+    begin
+      with_tmpchdir("rubytest-pathname") {|dir|
+        File.write("dummy", "dummy")
+        File.link("dummy", "hardlink")
+      }
+    rescue NotImplementedError
+      return false
+    rescue Errno::EACCES
+      return false
     end
     return true
   end
@@ -886,6 +903,7 @@ class TestPathname < Test::Unit::TestCase
   end
 
   def test_make_link
+    return if !has_hardlink?
     with_tmpchdir('rubytest-pathname') {|dir|
       open("a", "w") {|f| f.write "abc" }
       Pathname("l").make_link(Pathname("a"))

test/ruby/test_file_exhaustive.rb

@@ -130,7 +130,7 @@ class TestFileExhaustive < Test::Unit::TestCase
     @hardlinkfile = make_tmp_filename("hardlinkfile")
     begin
       File.link(regular_file, @hardlinkfile)
-    rescue NotImplementedError, Errno::EINVAL	# EINVAL for Windows Vista
+    rescue NotImplementedError, Errno::EINVAL, Errno::EACCES   # EINVAL for Windows Vista, EACCES for Android Termux
       @hardlinkfile = nil
     end
     @hardlinkfile