--- /dev/null
+/* Copyright (C) 1995-2018 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/>. */
+
+#ifndef _SYS_IPC_H
+#define _SYS_IPC_H 1
+
+#include <features.h>
+
+/* Get system dependent definition of `struct ipc_perm' and more. */
+#include <bits/ipctypes.h>
+#include <bits/ipc.h>
+
+#ifndef __uid_t_defined
+typedef __uid_t uid_t;
+# define __uid_t_defined
+#endif
+
+#ifndef __gid_t_defined
+typedef __gid_t gid_t;
+# define __gid_t_defined
+#endif
+
+#ifndef __mode_t_defined
+typedef __mode_t mode_t;
+# define __mode_t_defined
+#endif
+
+#ifndef __key_t_defined
+typedef __key_t key_t;
+# define __key_t_defined
+#endif
+
+__BEGIN_DECLS
+
+/* Generates key for System V style IPC. */
+extern key_t ftok (const char *__pathname, int __proj_id) __THROW;
+
+__END_DECLS
+
+#endif /* sys/ipc.h */