[Feature][ZXW-33]merge ZXW 0428 version

Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/inet/getnetgrent.c b/ap/libc/glibc/glibc-2.23/inet/getnetgrent.c
new file mode 100644
index 0000000..3443235
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/inet/getnetgrent.c
@@ -0,0 +1,49 @@
+/* Copyright (C) 1996-2016 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 <errno.h>
+#include <netdb.h>
+#include <stdlib.h>
+#include <libc-lock.h>
+
+/* Static buffer for return value.  We allocate it when needed.  */
+libc_freeres_ptr (static char *buffer);
+/* All three strings should fit in a block of 1kB size.  */
+#define BUFSIZE 1024
+
+
+
+static void
+allocate (void)
+{
+  buffer = (char *) malloc (BUFSIZE);
+}
+
+int
+getnetgrent (char **hostp, char **userp, char **domainp)
+{
+  __libc_once_define (static, once);
+  __libc_once (once, allocate);
+
+  if (buffer == NULL)
+    {
+      __set_errno (ENOMEM);
+      return -1;
+    }
+
+  return __getnetgrent_r (hostp, userp, domainp, buffer, BUFSIZE);
+}