ipcrm(ADM)                      19 June 1992                      ipcrm(ADM)


 Name

    ipcrm - remove a message queue, semaphore set or shared memory ID

 Syntax

    ipcrm [ options ]

 Description

    ipcrm removes one or more specified messages, a semaphore or shared mem-
    ory identifiers.  The identifiers are specified by the following options:

    -q msqid    removes the message queue identifier msqid from the system
                and destroys the message queue and data structure associated
                with it.

    -m shmid    removes the shared memory identifier shmid from the system.
                The shared memory segment and data structure associated with
                it are destroyed after the last detach.

    -s semid    removes the semaphore identifier semid from the system and
                destroys the set of semaphores and data structure associated
                with it.

    -Q msgkey   removes the message queue identifier, created with key
                msgkey, from the system and destroys the message queue and
                data structure associated with it.

    -M shmkey   removes the shared memory identifier, created with key
                shmkey, from the system.  The shared memory segment and data
                structure associated with it are destroyed after the last
                detach.

    -S semkey   removes the semaphore identifier, created with key semkey,
                from the system and destroys the set of semaphores and data
                structure associated with it.

    The details of the removes are described in msgctl(S), shmctl(S), and
    semctl(S).  The identifiers and keys may be found by using ipcs(ADM).

 See also

    ipcs(ADM), msgctl(S), msgget(S), msgop(S), semctl(S), semget(S),
    semop(S), shmctl(S), shmget(S), shmop(S)

 Note

    ipcrm cannot be used to remove semaphores created using creatsem(S) or to
    remove shared memory created using sdget(S).