From af9e072c7ee0e1be48eedccf442d85dec097964c Mon Sep 17 00:00:00 2001
From: normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 29 Jun 2015 23:24:56 +0000
Subject: io.c: reopen stdio streams correctly when given "w+"

* io.c (rb_io_oflags_modestr): handle O_TRUNC correctly
* test/ruby/test_io.rb (test_reopen_stdio): new test

Patch-by: cremno phobia <cremno@mail.ru>

[ruby-core:69779] [Bug #11319]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51066 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 test/ruby/test_io.rb | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'test/ruby/test_io.rb')

diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 9b3e80160d..9ded25b051 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -2069,6 +2069,15 @@ End
     }
   end
 
+  def test_reopen_stdio
+    mkcdtmpdir {
+      fname = 'bug11319'
+      File.write(fname, 'hello')
+      system(EnvUtil.rubybin, '-e', "STDOUT.reopen('#{fname}', 'w+')")
+      assert_equal('', File.read(fname))
+    }
+  end
+
   def test_reopen_mode
     feature7067 = '[ruby-core:47694]'
     make_tempfile {|t|
-- 
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