System administration command. Print report on interprocess communication (IPC) message queues, shared memory segments, and semaphore arrays for which the current process has read access. Options can be used to specify the type of resources to report on and the output format of the report.
Resource specification options:
Report on all IPC facilities: shared memory segments, message queues, and semaphore arrays. This is the default.
Report on shared memory segments.
Report on message queues.
Report on semaphore arrays.
Output format options:
Print creator and owner user IDs for IPC facilities.
Print resource maximum and minimum limits.
Print creator and last operation process identifiers.
Print attach, detach, and change times for shared memory segments, last operation and change times for semaphore arrays, and send, receive, and change times for message queues.
Print summary of current resource usage.
Print help message, then exit.
Used in combination with the -m, -q, or -s options. Report only on the resource specified by numeric identifier.