* lib/fileutils.rb (FileUtils::Entry_#copy_file): open the source

file first to ensure it can be copied.  [ruby-core:25498]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24823 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Wed Sep  9 22:02:02 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/fileutils.rb (FileUtils::Entry_#copy_file): open the source
+	  file first to ensure it can be copied.  [ruby-core:25498]
+
 Wed Sep  9 21:20:49 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/bigdecimal/bigdecimal.c (BigDecimal_data_type): typed.

lib/fileutils.rb

@@ -1261,8 +1261,10 @@ module FileUtils
     end
 
     def copy_file(dest)
-      File.open(dest, 'wb') do |f|
-        IO.copy_stream(path(), f)
+      File.open(path()) do |s|
+        File.open(dest, 'wb') do |f|
+          IO.copy_stream(s, f)
+        end
       end
     end
 

test/fileutils/test_fileutils.rb

@@ -223,6 +223,11 @@ end
       assert_same_entry srcpath, destpath
     end
 
+    assert_raise(Errno::ENOENT) {
+      cp 'tmp/cptmp', 'tmp/cptmp_new'
+    }
+    assert_file_not_exist('tmp/cptmp_new')
+
     # src==dest (1) same path
     touch 'tmp/cptmp'
     assert_raise(ArgumentError) {