ipcs - report System V interprocess communication facilities
ipcs [-abcmopqstMQST] [-C core] [-N system]
The ipcs program 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
active semaphores, message queues, and shared memory
(This is shorthand for specifying the -b, -c, -o,
-p, and -t options.)
-b Show the maximum allowed sizes for active
queues, and shared memory segments. The ``maximum
is the maximum number of bytes in a message on a
the size of a shared memory segment, or the number
in a set of semaphores.
-c Show the creator's name and group for active
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
a shared memory segment.
-p Show the process ID information for active
queues, and shared memory segments. The ``process
information'' is the last process to send a message
to or receive
a message from a message queue, the process that
semaphore, or the last process to attach or detach a
-q Display information about active message queues.
-s Display information about active semaphores.
-t Show access times for active semaphores, message
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.
Extract values associated with the name list from
core instead of the running kernel.
-M Display system information about shared memory.
Extract the name list from the specified system instead of the
-Q Display system information about messages queues.
-S Display system information about semaphores.
-T Display system information about shared memory, message queues
If none of the -M, -m, -Q, -q, -S, or -s options are specified, information
about all active IPC facilities is listed.
System data structures may change while ipcs is running; the
ipcs is not guaranteed to be consistent.
Thorsten Lockert <email@example.com>
This manual page is woefully incomplete, because it does not
at all attempt
to explain the information printed by ipcs.
OpenBSD 3.6 June 18, 1994
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