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The program
provides information on System V interprocess communication (IPC) facilities
on the system. The options are as follows: Show the maximum amount of
information possible when displaying active semaphores, message queues,
and shared memory segments. (This is shorthand for specifying the and
options.) Show the maximum allowed sizes for active semaphores, message
queues, and shared memory segments. The is the maximum number of bytes
in a message on a message queue, the size of a shared memory segment, or
the number number of semaphores in a set of semaphores. Show the creator’s
name and group for active semaphores, message queues, and shared memory
segments. Display information about active shared memory segments. Show
outstanding usage for active message queues, and shared memory segments.
The is the number of messages in a message queue, or the number of processes
attached to a shared memory segment. Show the process ID information for
active semaphores, message queues, and shared memory segments. The 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. Display information about active message
queues. Display information about active semaphores. 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. Extract the name
list from the specified system instead of the default Display system
information about shared memory. Extract values associated with the name
list from the specified core instead of the default and semaphores. Display
system information about messages queues. Display system information about
semaphores. Display system information about shared memory, message queues
If none of the or options are specified, information about all
active IPC facilities is listed.
System data structures may
change while is running; the output of is not guaranteed to be consistent.
This manual page is woefully incomplete, because it does not at all
attempt to explain the information printed by
default kernel memory
default system name list
Thorsten Lockert <tholo@sigmasoft.com>
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