1 files changed, 48 insertions, 0 deletions
diff --git a/io/dup3.c b/io/dup3.c
new file mode 100644
index 0000000000..162ab4e68b
--- /dev/null
+++ b/io/dup3.c
@@ -0,0 +1,48 @@
+/* Copyright (C) 2008 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+
+/* Duplicate FD to FD2, closing the old FD2 and making FD2 be
+   open the same file as FD is which setting flags according to
+   FLAGS.  Return FD2 or -1.  */
+int
+dup3 (fd, fd2, flags)
+     int fd;
+     int fd2;
+     int flags;
+{
+  if (fd < 0 || fd2 < 0)
+    {
+      __set_errno (EBADF);
+      return -1;
+    }
+
+  if (fd == fd2)
+    /* No way to check that they are valid.  */
+    return fd2;
+
+  __set_errno (ENOSYS);
+  return -1;
+}
+stub_warning (dup3)
+
+#include <stub-tag.h>