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diff --git a/sysvipc/sys/sem.h b/sysvipc/sys/sem.h
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+/* Copyright (C) 1995 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_SEM_H
+#define _SYS_SEM_H
+
+#include <features.h>
+#include <sys/types.h>
+
+/* Get common definition of System V style IPC.  */
+#include <sys/ipc.h>
+
+/* Get system dependent definition of `struct semid_ds' and more.  */
+#include <sys/sem_buf.h>
+
+__BEGIN_DECLS
+
+/* The following System V style IPC functions implement a semaphore
+   handling.  The definition is found in XPG2.  */
+
+/* Structure used for argument to `semop' to describe operations.  */
+struct sembuf
+{
+  short int sem_num;		/* semaphore number */
+  short int sem_op;		/* semaphore operation */
+  short int sem_flg;		/* operation flag */
+};
+
+
+/* Semaphore control operation.  */
+extern int semctl __P ((int __semid, int __semnum, int __cmd,
+			union semun __arg));
+
+/* Get semaphore.  */
+extern int semget __P ((key_t __key, int __nsems, int __semflg));
+
+/* Operate on semaphore.  */
+extern int semop __P ((int __semid, struct sembuf *__sops,
+		       unsigned int __nsops));
+
+__END_DECLS
+
+#endif /* sys/sem.h */