...of the last msgsnd (2) and msgrcv (2) operations on message queues, the time of the last shmat (2) and shmdt (2) operations on shared memory, and the time of the last semop (2) …...of the last msgsnd (2) and msgrcv (2) operations on message queues, the time of the last shmat (2) and shmdt (2) operations on shared memory, and the time of the last semop (2) …