0001-File-truncate-now-raises-an-IOError-if-file-is-not-o.patch

From 4e9139b57ddd5920e7e993fad0d9e59f36ab18aa Mon Sep 17 00:00:00 2001
From: Jose Narvaez <[email protected]>
Date: Tue, 13 Jul 2010 20:29:11 -0430
Subject: [PATCH] File#truncate now raises an IOError if file is not opened for writing

---
 kernel/common/file.rb |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/common/file.rb b/kernel/common/file.rb
index e1602ea..143061b 100644
--- a/kernel/common/file.rb
+++ b/kernel/common/file.rb
@@ -1002,9 +1002,9 @@ class File < IO
   def truncate(length)
     length = Type.coerce_to(length, Integer, :to_int)
 
+    ensure_open_and_writable
     raise Errno::EINVAL, "Can't truncate a file to a negative length" if length < 0
-    raise IOError, "File is closed" if closed?
-
+    
     n = POSIX.ftruncate(@descriptor, length)
     Errno.handle if n == -1
     n
-- 
1.7.0.3