------ Message Queues -------- key msqid owner perms used-bytes messages -- ------ Shared Memory Segments -------- key shmid owner perms bytes nattch status -- ------ Semaphore Arrays -------- key semid owner perms nsems ------ Message Queues Send/Recv/Change Times -------- msqid owner send recv change -- ------ Shared Memory Attach/Detach/Change Times -------- shmid owner attached detached changed -- ------ Semaphore Operation/Change Times -------- semid owner last-op last-changed ------ Message Queues PIDs -------- msqid owner lspid lrpid -- ------ Shared Memory Creator/Last-op PIDs -------- shmid owner cpid lpid ------ Message Queues Creators/Owners -------- msqid perms cuid cgid uid gid -- ------ Shared Memory Segment Creators/Owners -------- shmid perms cuid cgid uid gid -- ------ Semaphore Arrays Creators/Owners -------- semid perms cuid cgid uid gid ------ Messages Limits -------- ------ Shared Memory Limits -------- ------ Semaphore Limits -------- ------ Messages Status -------- ------ Shared Memory Status -------- ------ Semaphore Status --------