The
ipcs
utility provides information on System V interprocess communication
(IPC) facilities on the system.
The options are as follows:
|
| -a
|
| |
Show the maximum amount of information possible when
displaying active semaphores, message queues,
and shared memory segments.
(This is shorthand for specifying the
-b,
-c,
-o,
-p,
and
-t
options.)
|
| -b
|
| |
Show the maximum allowed sizes for active semaphores, message queues,
and shared memory segments.
The
"maximum allowed size"
is the maximum number of bytes in a message on a message queue,
the size of a shared memory segment,
or the number of semaphores in a set of semaphores.
|
| -c
|
| |
Show the creator's name and group for active semaphores, message queues,
and shared memory segments.
|
| -m
|
| |
Display information about active shared memory segments.
|
| -o
|
| |
Show outstanding usage for active message queues,
and shared memory segments.
The
"outstanding usage"
is the number of messages in a message queue, or the number
of processes attached to a shared memory segment.
|
| -p
|
| |
Show the process ID information for active semaphores, message queues,
and shared memory segments.
The
"process ID information"
is the last process to send a message to or receive a message from
a message queue,
the process that created a semaphore, or the last process to attach
or detach a shared memory segment.
|
| -q
|
| |
Display information about active message queues.
|
| -s
|
| |
Display information about active semaphores.
|
| -t
|
| |
Show access times for active semaphores, message queues,
and shared memory segments.
The access times is the time
of the last control operation on an IPC object,
the last send or receive of a message,
the last attach or detach of a shared memory segment,
or the last operation on a semaphore.
|
| -C core
|
| |
Extract values associated with the name list from the specified
core instead of the default
/dev/kmem.
Implies
-y.
|
| -M
|
| |
Display system information about shared memory.
|
| -N system
|
| |
Extract the name list from the specified system instead of the
default
/boot/kernel/kernel.
Implies
-y.
|
| -Q
|
| |
Display system information about messages queues.
|
| -S
|
| |
Display system information about semaphores.
|
| -T
|
| |
Display system information about shared memory, message queues
and semaphores.
|
| -y
|
| |
Use the
kvm(3)
interface instead of the
sysctl(3)
interface to extract the required information.
If
ipcs
is to operate on the running system,
using
kvm(3)
will require read privileges to
/dev/kmem.
|
| -u user
|
| |
Display information about IPC mechanisms owned by
user.
User specification can be in the form of a numeric UID or
a login name.
|
|
If none of the
-M,
-m,
-Q,
-q,
-S,
or
-s
options are specified, information about all active IPC facilities is
listed.
