IPCRM(1)		  BSD General Commands Manual		      IPCRM(1)

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

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

DESCRIPTION
     The ipcrm utility 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 following options are generic:

     -v      If specified once with -W or with -1 for an object, it will show
	     all removed objects.  If specified twice with -W or with -1 for
	     an objects, it will show all removed objects and all failed
	     removals.

     -W      Try to wipe all specified message queues, semaphores and shared
	     memory segments.

     -y      Use the kvm(3) interface instead of the sysctl(3) interface to
	     extract the required information.	If ipcrm is to operate on the
	     running system, using kvm(3) will require read privileges to
	     /dev/kmem.

     The following options are used to specify which IPC objects will be
     removed.  Any number and combination of these options can be used:

     -q msqid
	     Remove the message queue associated with the ID msqid from the
	     system.

     -m shmid
	     Mark the shared memory segment associated with ID shmid for
	     removal.  This marked segment will be destroyed after the last
	     detach.

     -s semid
	     Remove the semaphore set associated with ID semid from the sys‐
	     tem.

     -Q msgkey
	     Remove the message queue associated with key msgkey from the sys‐
	     tem.

     -M shmkey
	     Mark the shared memory segment associated with key shmkey for
	     removal.  This marked segment will be destroyed after the last
	     detach.

     -S semkey
	     Remove the semaphore set associated with key semkey from the sys‐
	     tem.

     The identifiers and keys associated with these System V IPC objects can
     be determined by using ipcs(1).  If the identifier or the key is -1, it
     will remove all these objects.

SEE ALSO
     ipcs(1)

HISTORY
     The wiping of all System V IPC objects was first implemented in
     FreeBSD 6.4 and 7.1.

AUTHORS
     The original author was Adam Glass.  The wiping of all System V IPC
     objects was thought up by Callum Gibson and extended and implemented by
     Edwin Groothuis.

BSD			       December 12, 2007			   BSD