NAME

ipcrm − remove a message queue, semaphore set or shared memory id

SYNOPSIS

ipcrm [ options ]

DESCRIPTION

Ipcrm will remove one or more specified messages, semaphore or shared memory identifiers.  The identifiers are specified by the following options:

−q msqid Remove the message queue identifier msqid from the system and destroy the message queue and data structure associated with it. 

−m shmid Remove 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 Remove the semaphore identifier semid from the system and destroy the set of semaphores and data structure associated with it. 

−Q msgkey Remove the message queue identifier, created with key msgkey, from the system and destroy the message queue and data structure associated with it. 

−M shmkey Remove 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 Remove the semaphore identifier, created with key semkey, from the system and destroy the set of semaphores and data structure associated with it. 

The details of the removes are described in msgctl(2), shmctl(2), and semctl(2).  The identifiers and keys may be found by using ipcs(1). 

DEPENDENCIES

Series 300 Diskless
In a cluster, messages, semaphores, and shared memory are not global across machines.  Therefore, ipcrm can be used to remove only local identifiers. 

SEE ALSO

ipcs(1), msgctl(2), msgget(2), msgop(2), semctl(2), semget(2), semop(2), shmctl(2), shmget(2), shmop(2). 

Hewlett-Packard Company  —  May 11, 2021