Hallo, dies ist ein Test.

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/*
 * Copyright (c) 1996, 2017, Oracle and/or its affiliates. All rights reserved.
 */

#ifndef _SYS_IPC_H
#define	_SYS_IPC_H

#include <sys/isa_defs.h>
#include <sys/feature_tests.h>
#include <sys/types.h>

#ifdef	__cplusplus
extern "C" {
#endif

/* Common IPC access structure */

struct ipc_perm {
	uid_t		uid;	/* owner's user id */
	gid_t		gid;	/* owner's group id */
	uid_t		cuid;	/* creator's user id */
	gid_t		cgid;	/* creator's group id */
	mode_t		mode;	/* access modes */
	uint_t		seq;	/* slot usage sequence number */
	key_t		key;	/* key */
#if !defined(_LP64)
	int		pad[4]; /* reserve area */
#endif
};

/* Common IPC definitions */

/*
 * Flags used in a kipc_perm_t's ipc_mode member.
 * Bits 0x1ff (0777) are reserved for the usual access mode bits.
 */
#define	IPC_ALLOC	0x8000		/* entry currently allocated */

/* Flags for ipc_keylookup() */
#define	IPC_CREAT	0x200		/* create entry if key doesn't exist */
#define	IPC_EXCL	0x400		/* fail if key exists */

/* Flags used with semop(), msgrcv(), and msgsnd() */
#define	IPC_NOWAIT	0x800		/* error if request must wait */

/* Keys */
#define	IPC_PRIVATE	((key_t)0)	/* private key */

/* Common IPC control commands */
#define	IPC_RMID	10	/* remove identifier */
#define	IPC_SET		11	/* set options */
#define	IPC_STAT	12	/* get options */

#if (!defined(_KERNEL) && !defined(_XOPEN_SOURCE)) || defined(_XPG4_2) || \
	defined(__EXTENSIONS__)
key_t ftok(const char *, int);
#endif /* (!defined(_KERNEL) && !defined(_XOPEN_SOURCE))... */

#ifdef	__cplusplus
}
#endif

#endif	/* _SYS_IPC_H */