1 files changed, 31 insertions, 0 deletions
diff --git a/otherlibs/win32unix/dup2.c b/otherlibs/win32unix/dup2.c
new file mode 100644
index 000000000..a7eb8ee91
--- /dev/null
+++ b/otherlibs/win32unix/dup2.c
@@ -0,0 +1,31 @@
+/***********************************************************************/
+/*                                                                     */
+/*                           Objective Caml                            */
+/*                                                                     */
+/*            Xavier Leroy, projet Cristal, INRIA Rocquencourt         */
+/*                                                                     */
+/*  Copyright 1996 Institut National de Recherche en Informatique et   */
+/*  Automatique.  Distributed only by permission.                      */
+/*                                                                     */
+/***********************************************************************/
+
+/* $Id$ */
+
+#include <mlvalues.h>
+#include "unixsupport.h"
+
+value unix_dup2(value fd1, value fd2)        /* ML */
+{
+  HANDLE oldh, newh;
+
+  oldh = Handle_val(fd2);
+  if (! DuplicateHandle(GetCurrentProcess(), Handle_val(fd1),
+                        GetCurrentProcess(), &newh,
+                        0L, inherit, DUPLICATE_SAME_ACCESS)) {
+    _dosmaperr(GetLastError());
+    return -1;
+  }
+  Handle_val(fd2) = newh;
+  CloseHandle(oldh);
+  return Val_unit;
+}