ipcrm(1)                 - remove the specified message queues, semaphore sets, and shared memory segments
lockfile(1)              - conditional semaphore-file creator
sem_close(2)             - close a named semaphore
sem_open(2)              - initialize and open a named semaphore
sem_post(2)              - unlock a semaphore
sem_trywait(2), sem_wait(2) - lock a semaphore
sem_unlink(2)            - remove a named semaphore
semctl(2)                - control operations on a semaphore set
semget(2)                - obtain a semaphore id
semop(2)                 - atomic array of operations on a semaphore set
(END)