ipcrm(1)                                                       ipcrm(1)

  ipcrm

  NAME

    ipcrm - remove an interprocess communication (IPC) identifier (message
    queue, semaphore set, or shared memory segment)

  SYNOPSIS

    ipcrm [-m shmid | -M shmkey | -q msgid | -Q msgkey |
          -s semid | -S semkey] ...

  DESCRIPTION

    The ipcrm(1) utility removes message queues, semaphore sets, and shared
    memory segments from the system. The options specify which interprocess
    communication object is to be removed. Generally, a lowercase option takes
    an identifier as an argument and the uppercase option takes a key as an
    argument. The uppercase option removes the object created using the
    specified key.

  OPTIONS
    -m shmid
        Removes the shared memory identifier shmid; after the last detach, the
        associated shared memory segment and associated data structure are
        destroyed.
    -M shmkey
        Removes the shared memory identifier that was created using shmkey;
        after the last detach, the associated shared memory segment and
        associated data structure are destroyed.
    -q msgid
        Removes the message queue identifier msgid and destroys its associated
        message queue and data structure.
    -Q msgkey
        Removes the message queue identifier that was created using msgkey and
        destroys its associated message queue and data structure.
    -s semid
        Removes the semaphore identifier semid and destroys the associated set
        of semaphores and data structure.
    -S semkey
        Removes the semaphore identifier that was created using semkey and
        destroys the associated set of semaphores and data structure.

  DIAGNOSTICS

    The ipcrm(1) utility exits with status 0 for success, and >0 if an error
    occurred.

  SEE ALSO

    ipcs(1)

    msgctl(2)

    semctl(2)

    shmctl(2)