Open System Services Shell and Utilities Reference Manual (G06.29+, H06.08+, J06.03+)

ipcs(1) OSS Shell and Utilities Reference Manual
NAME
ipcs - Reports interprocess communication (IPC) facilities status
SYNOPSIS
ipcs [-a | -bcopt][-mqs]
FLAGS
-a Is the same as specifying the -b, -c, -o, -p, and -t flags.
-b Writes the maximum number of bytes in message queues, the max-
imum allowed size of segments for shared memory, and the number of
semaphores in each semaphore set.
-c Writes the username and group name of the user who created the facil-
ity.
-m Writes information about active shared memory segments.
-o Writes the following usage information:
• Number of messages on queue.
• Total number of bytes in message queues.
• Number of processes attached to shared memory segments.
-p Writes the following usage information:
• OSS process ID of the last process to receive a message and
OSS process ID of the last process to send a message currently
on message queues
• Process identifier of the creating process for a facility
• Process identifier of the last process to call the shmat(),
shmdt(),orshmctl() function for the segment
-q Writes information about active message queues.
-s Writes information about active semaphore sets.
-t Writes the times of the following actions:
• Either:
— The creation of the facility
— The last control operation that changed the facility
(either by modifying permissions information for the
facility or by removing the facility)
• The last use of the msgsnd() function and of the msgrcv()
function on message queues
• The last use of the shmat() function and of the shmdt() func-
tion on shared memory
• The last use of the semop() function on semaphore sets
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