From 21f81885ab310f564fb60bfe7dcde816eeb11994 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 28 Nov 2013 07:15:56 +0000
Subject: win32.c: rb_w32_dup2

* win32/win32.c (rb_w32_dup2): extract from rb_cloexec_dup2() and
  redirect_dup2().

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43890 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 win32/win32.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'win32')

diff --git a/win32/win32.c b/win32/win32.c
index e1ac4054fd..9cbd07f669 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -79,6 +79,7 @@ static char *w32_getenv(const char *name, UINT cp);
 #undef fclose
 #undef close
 #undef setsockopt
+#undef dup2
 
 #if defined __BORLANDC__
 #  define _filbuf _fgetc
@@ -5465,6 +5466,28 @@ rb_w32_getppid(void)
     return ppid;
 }
 
+STATIC_ASSERT(std_handle, (STD_OUTPUT_HANDLE-STD_INPUT_HANDLE)==(STD_ERROR_HANDLE-STD_OUTPUT_HANDLE));
+
+/* License: Ruby's */
+#define set_new_std_handle(newfd, handle) do { \
+	if ((unsigned)(newfd) > 2) break; \
+	SetStdHandle(STD_INPUT_HANDLE+(STD_OUTPUT_HANDLE-STD_INPUT_HANDLE)*(newfd), \
+		     (handle)); \
+    } while (0)
+#define set_new_std_fd(newfd) set_new_std_handle(newfd, (HANDLE)rb_w32_get_osfhandle(newfd))
+
+/* License: Ruby's */
+int
+rb_w32_dup2(int oldfd, int newfd)
+{
+    int ret;
+
+    if (oldfd == newfd) return newfd;
+    ret = dup2(oldfd, newfd);
+    set_new_std_fd(newfd);
+    return ret;
+}
+
 /* License: Ruby's */
 int
 rb_w32_uopen(const char *file, int oflag, ...)
-- 
cgit v1.2.3