diff --git a/ap/libc/glibc/glibc-2.23/posix/getgroups.c b/ap/libc/glibc/glibc-2.23/posix/getgroups.c
new file mode 100644
index 0000000..45604ff
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/posix/getgroups.c
@@ -0,0 +1,44 @@
+/* Copyright (C) 1991-2016 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 <stddef.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <limits.h>
+
+
+/* If SIZE is zero, return the number of supplementary groups
+   the calling process is in.  Otherwise, fill in the group IDs
+   of its supplementary groups in LIST and return the number written.  */
+int
+__getgroups (int size, gid_t *list)
+{
+#if defined (NGROUPS_MAX) && NGROUPS_MAX == 0
+  /* The system has no supplementary groups.  */
+  return 0;
+#endif
+
+  __set_errno (ENOSYS);
+  return -1;
+}
+
+#if !(defined (NGROUPS_MAX) && NGROUPS_MAX == 0)
+stub_warning (getgroups);
+#endif
+
+weak_alias (__getgroups, getgroups)