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IPCRM(1) General Commands Manual IPCRM(1)

ipcrm
remove the specified message queues, semaphore sets, and shared memory segments

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

ipcrm removes the specified message queues, semaphores, and shared memory segments. These System V IPC objects can be specified by their creation ID or any associated key.
The options are as follows:
 
 
shmkey
Mark the shared memory segment associated with key shmkey for removal. This marked segment will be destroyed after the last detach.
 
 
shmid
Mark the shared memory segment associated with ID shmid for removal. This marked segment will be destroyed after the last detach.
 
 
msgkey
Remove the message queue associated with key msgkey from the system.
 
 
msqid
Remove the message queue associated with the ID msqid from the system.
 
 
semkey
Remove the semaphore set associated with key semkey from the system.
 
 
semid
Removes the semaphore set associated with ID semid from the system.
The identifiers and keys associated with these System V IPC objects can be determined by using ipcs(1).

The ipcrm utility exits 0 on success, and >0 if an error occurs.

ipcs(1)

The ipcrm utility is compliant with the X/Open System Interfaces option of the IEEE Std 1003.1-2008 (“POSIX.1”) specification.
September 9, 2015 OpenBSD-current