2 files changed, 8 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index a678de8b2..d653ab3aa 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Dec 25 13:28:20 2008  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* io.c (rb_io_flush): fsync() after buffer is flushed on win32.
+	  [ruby-core:20043]
+
 Thu Dec 25 14:32:23 2008  Koichi Sasada  <ko1@atdot.net>
 
 	* vm_insnhelper.c (vm_method_search): fix control flow bug.
diff --git a/io.c b/io.c
index 605799259..3331d442f 100644
--- a/io.c
+++ b/io.c
@@ -983,6 +983,9 @@ rb_io_flush(VALUE io)
 
     if (fptr->mode & FMODE_WRITABLE) {
         io_fflush(fptr);
+#ifdef _WIN32
+	fsync(fptr->fd);
+#endif
     }
     if (fptr->mode & FMODE_READABLE) {
         io_unread(fptr);