The
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
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 system.
-Q msgkey
Remove the message queue associated with key
msgkey
from the system.
-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 system.
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.
The wiping of all System V IPC objects was first implemented in
Fx 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.
