/* Duplicate an open file descriptor to a specified file descriptor.
- Copyright (C) 1999, 2004-2007, 2009-2011 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2004-2007, 2009-2014 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
-/* Get declarations of the Win32 API functions. */
+/* Get declarations of the native Windows API functions. */
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
/* Get _get_osfhandle. */
# include "msvc-nothrow.h"
-static inline int
+static int
ms_windows_dup2 (int fd, int desired_fd)
{
int result;
{
int result;
-# if !((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__)
+# ifdef F_GETFL
/* On Linux kernels 2.6.26-2.6.29, dup2 (fd, fd) returns -EBADF.
On Cygwin 1.5.x, dup2 (1, 1) returns 0.
+ On Cygwin 1.7.17, dup2 (1, -1) dumps core.
+ On Cygwin 1.7.25, dup2 (1, 256) can dump core.
On Haiku, dup2 (fd, fd) mistakenly clears FD_CLOEXEC. */
+# if HAVE_SETDTABLESIZE
+ setdtablesize (desired_fd + 1);
+# endif
+ if (desired_fd < 0)
+ fd = desired_fd;
if (fd == desired_fd)
return fcntl (fd, F_GETFL) == -1 ? -1 : fd;
# endif