ipc_perm           17 include/uapi/linux/msg.h 	struct ipc_perm msg_perm;
ipc_perm           24 include/uapi/linux/sem.h 	struct ipc_perm	sem_perm;		/* permissions .. see ipc.h */
ipc_perm           27 include/uapi/linux/shm.h 	struct ipc_perm		shm_perm;	/* operation perms */