[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/sysdeps/nacl/dup.c b/ap/libc/glibc/glibc-2.23/sysdeps/nacl/dup.c
new file mode 100644
index 0000000..34a7cd4
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/sysdeps/nacl/dup.c
@@ -0,0 +1,30 @@
+/* Duplicate a file descriptor. NaCl version.
+ Copyright (C) 2015-2016 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <unistd.h>
+#include <nacl-interfaces.h>
+
+
+/* Duplicate FD, returning a new file descriptor open on the same file. */
+int
+__dup (int fd)
+{
+ int result;
+ return NACL_CALL (__nacl_irt_fdio.dup (fd, &result), result);
+}
+weak_alias (__dup, dup)