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+/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _SYS_SHM_H
+#error "Never use <bits/shm.h> directly; include <sys/shm.h> instead."
+#endif
+
+
+#include <features.h>
+#include <sys/types.h>
+
+/* Flags for `shmat'.  */
+#define SHM_RDONLY	010000		/* attach read-only else read-write */
+#define SHM_RND		020000		/* round attach address to SHMLBA */
+#define SHM_REMAP	040000		/* take-over region on attach */
+
+/* Commands for `shmctl'.  */
+#define SHM_LOCK	11		/* lock segment (root only) */
+#define SHM_UNLOCK	12		/* unlock segment (root only) */
+
+
+__BEGIN_DECLS
+
+/* Data structure describing a set of semaphores.  */
+struct shmid_ds
+{
+  struct ipc_perm sem_perm;		/* operation permission struct */
+  int shm_segsz;			/* size of segment in bytes */
+  __time_t sem_atime;			/* time of last shmat() */
+  __time_t sem_dtime;			/* time of last shmdt() */
+  __time_t sem_ctime;			/* time of last change by shmctl() */
+  __pid_t shm_cpid;			/* pid of creator */
+  __pid_t shm_lpid;			/* pid of last shmop */
+  unsigned short int shm_nattch;	/* number of current attaches */
+};
+
+__END_DECLS