From 5988c787496e104d3552be02841c416f6006f4b6 Mon Sep 17 00:00:00 2001
From: shyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 20 May 2010 06:45:22 +0000
Subject: merge revision(s) 26253: 	* io.c (io_fwrite): preserve errno. 
 [ruby-core:27425]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_7@27913 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog              |  4 ++++
 io.c                   |  5 ++++-
 test/ruby/test_pipe.rb | 14 ++++++++++++++
 version.h              |  8 ++++----
 4 files changed, 26 insertions(+), 5 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index aa3ff2655b..e1e5baaa5b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu May 20 15:39:26 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* io.c (io_fwrite): preserve errno.  [ruby-core:27425]
+
 Tue Apr 20 08:04:37 2010  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* io.c (rb_io_s_read): close the IO if an exception is raised on
diff --git a/io.c b/io.c
index e815c07c9f..1b5aa68c72 100644
--- a/io.c
+++ b/io.c
@@ -120,6 +120,9 @@ extern void Init_File _((void));
 # endif
 #endif
 
+#define preserving_errno(stmts) \
+	do {int saved_errno = errno; stmts; errno = saved_errno;} while (0)
+
 VALUE rb_cIO;
 VALUE rb_eEOFError;
 VALUE rb_eIOError;
@@ -488,7 +491,7 @@ io_fwrite(str, fptr)
 	r = write(fileno(f), RSTRING(str)->ptr+offset, l);
         TRAP_END;
 #if BSD_STDIO
-	fseeko(f, lseek(fileno(f), (off_t)0, SEEK_CUR), SEEK_SET);
+	preserving_errno(fseeko(f, lseek(fileno(f), (off_t)0, SEEK_CUR), SEEK_SET));
 #endif
         if (r == n) return len;
         if (0 <= r) {
diff --git a/test/ruby/test_pipe.rb b/test/ruby/test_pipe.rb
index c3b4d29c0a..0ac921b9c2 100644
--- a/test/ruby/test_pipe.rb
+++ b/test/ruby/test_pipe.rb
@@ -15,4 +15,18 @@ class TestPipe < Test::Unit::TestCase
       r.close
     end
   end
+
+  def test_write
+    bug2559 = '[ruby-core:27425]'
+    a, b = IO.pipe
+    begin
+      a.close
+      assert_raises(Errno::EPIPE, bug2559) do
+        b.write("hi")
+      end
+    ensure
+      a.close if !a.closed?
+      b.close if !b.closed?
+    end
+  end
 end
diff --git a/version.h b/version.h
index 57a5368cc2..e37a14cec3 100644
--- a/version.h
+++ b/version.h
@@ -1,14 +1,14 @@
 #define RUBY_VERSION "1.8.7"
-#define RUBY_RELEASE_DATE "2010-04-20"
+#define RUBY_RELEASE_DATE "2010-05-20"
 #define RUBY_VERSION_CODE 187
-#define RUBY_RELEASE_CODE 20100420
-#define RUBY_PATCHLEVEL 254
+#define RUBY_RELEASE_CODE 20100520
+#define RUBY_PATCHLEVEL 255
 
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 8
 #define RUBY_VERSION_TEENY 7
 #define RUBY_RELEASE_YEAR 2010
-#define RUBY_RELEASE_MONTH 4
+#define RUBY_RELEASE_MONTH 5
 #define RUBY_RELEASE_DAY 20
 
 #ifdef RUBY_EXTERN
-- 
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