.\" $OpenBSD: ipcrm.1,v 1.2 1996/06/26 05:34:34 deraadt Exp $
.\" Copyright (c) 1994 Adam Glass
.\" All rights reserved.
.\" 
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.\" modification, are permitted provided that the following conditions
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.\"    notice, this list of conditions and the following disclaimer.
.\" 2. The name of the Author may not be used to endorse or promote products
.\"    derived from this software without specific prior written permission.
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.\" THIS SOFTWARE IS PROVIDED BY Adam Glass ``AS IS'' AND
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.\""
.Dd August 8th, 1994
.Dt ipcrm 1
.Os
.Sh NAME
.Nm ipcrm
.Nd remove the specified message queues, semaphore sets, and shared memory
segments
.Sh SYNOPSIS
.Nm ipcrm
.Op Fl q Ar msqid
.Op Fl m Ar shmid
.Op Fl s Ar semid
.Op Fl Q Ar msgkey
.Op Fl M Ar shmkey
.Op Fl S Ar semkey
.Ar ...
.Sh DESCRIPTION
.Nm 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.
.Pp
The following options are used to specify which IPC objects will be removed.  Any number and combination of these options can be used:
.Bl -tag -width indent
.It Fl q Ar msqid
Remove the message queue associated with the id
.Nm msqid
from the system.
.It Fl m Ar shmid
Mark the shared memory segment associated with id 
.Nm shmid
for removal.
This marked segment will be destroyed after the last detach.
.It Fl s Ar semid
Removes the semaphore set associated with id
.Nm semid
from the system.
.It Fl Q Ar msgkey
Remove the message queue associated with key 
.Nm msgkey
from the system.
.It Fl M Ar shmkey
Mark the shared memory segment associated with key 
.Nm shmkey
for removal.
This marked segment will be destroyed after the last detach.
.It Fl S Ar semkey
Remove the semaphore set associated with key
.Nm semkey
from the system.
.El
.Pp
The identifiers and keys associated with these System V IPC objects can be
determined by using
.Xr ipcs 1
.
.Sh SEE ALSO
.Xr ipcs 1