struct ipc_perm

{

	key_t __ipc_perm_key;

	uid_t uid;

	gid_t gid;

	uid_t cuid;

	gid_t cgid;

	mode_t mode;

	int __ipc_perm_seq;

	long __pad1;

	long __pad2;

};

#define IPC_64 0x100