The following options are supported:
-m
Prints information about active shared memory
segments.
-q
Prints information about active message queues.
-s
Prints information about active semaphores.
If -m, -q, or -s are specified, information
about only those indicated is printed. If none of these three is specified,
information about all three is printed subject to these options:
-a
Uses all XCU5 print options. (This is a shorthand
notation for -b, -c, -o, -p, and -t.)
-A
Uses all print options. (This is a shorthand notation for
-b, -c, -i, -J, -o, -p, and
-t.)
-b
Prints information on biggest allowable size: maximum
number of bytes in messages on queue for message queues, size of segments for
shared memory, and number of semaphores in each set for semaphores. See below
for meaning of columns in a listing.
-c
Prints creator's login name and group name. See
below.
-D mtype
Displays, in hexadecimal and
ASCII, the contents
of all messages of type
mtype found on any message queue that the user
invoking
ipcs has permission to read. If
mtype is
0, all
messages are displayed. If
mtype is negative, all messages with type
less than or equal to the absolute value of
mtype are displayed. (See
msgrcv(2) and
msgsnap(2)).
-i
Prints number of ISM attaches to shared memory
segments.
-J
Prints the creator's project.
-o
Prints information on outstanding usage: number of
messages on queue and total number of bytes in messages on queue for message
queues and number of processes attached to shared memory segments.
-p
Prints process number information: process ID of
last process to send a message, process ID of last process to receive a
message on message queues, process ID of creating process, and process
ID of last process to attach or detach on shared memory segments. See
below.
-t
Prints time information: time of the last control
operation that changed the access permissions for all facilities, time of last
msgsnd(2) and last
msgrcv(2) on message queues, time of last
shmat(2) and last
shmdt(2) on shared memory (see
shmop(2)), time of last
semop(2) on semaphores. See below.
-z zone
Prints information about facilities associated with the
specified zone (see
zones(7)). The zone can be specified as either a
name or a numeric id. The default is to display information about the zone in
which the command is executing. Notice that this option is only useful when
executing in the global zone.
-Z
When executing in the global zone, prints information
about all zones. Otherwise, prints information about the zone in which the
command is executing. The output includes the zone associated with each
facility.
The column headings and the meaning of the columns in an
ipcs listing are given below. The letters in parentheses indicate the
options that cause the corresponding heading to appear and "all"
means that the heading always appears. Note: These options only
determine what information is provided for each facility; they do not
determine which facilities are listed.
T (all)
Type of the facility:
q
message queue
m
shared memory segment
s
semaphore
ID (all)
The identifier for the facility entry.
KEY (all)
The key used as an argument to
msgget(2),
semget(2), or
shmget(2) to create the facility entry.
(
Note: The key of a shared memory segment is changed to
IPC_PRIVATE when the segment has been removed until all processes
attached to the segment detach it.)
MODE (all)
The facility access modes and flags: The mode consists of
11 characters that are interpreted as follows. The first two characters are:
R
S
-
The corresponding special flag is not set.
The next nine characters are interpreted as three sets of three
bits each. The first set refers to the owner's permissions; the next to
permissions of others in the user-group of the facility entry; and the last
to all others. Within each set, the first character indicates permission to
read, the second character indicates permission to write or alter the
facility entry, and the last character is currently unused.
The permissions are indicated as follows:
r
Read permission is granted.
w
Write permission is granted.
a
Alter permission is granted.
−
The indicated permission is not granted.
OWNER (all)
The login name of the owner of the facility entry.
GROUP (all)
The group name of the group of the owner of the facility
entry.
CREATOR (a,A,c)
The login name of the creator of the facility
entry.
CGROUP (a,A,c)
The group name of the group of the creator of the
facility entry.
CBYTES (a,A,o)
The number of bytes in messages currently outstanding on
the associated message queue.
QNUM (a,A,o)
The number of messages currently outstanding on the
associated message queue.
QBYTES (a,A,b)
The maximum number of bytes allowed in messages
outstanding on the associated message queue.
LSPID (a,A,p)
The process ID of the last process to send a
message to the associated queue.
LRPID (a,A,p)
The process ID of the last process to receive a
message from the associated queue.
STIME (a,A,t)
The time the last message was sent to the associated
queue.
RTIME (a,A,t)
The time the last message was received from the
associated queue.
CTIME (a,A,t)
The time when the associated entry was created or
changed.
ISMATTCH (a,i)
The number of ISM attaches to the associated
shared memory segments.
NATTCH (a,A,o)
The number of processes attached to the associated shared
memory segment.
SEGSZ (a,A,b)
The size of the associated shared memory segment.
CPID (a,A,p)
The process ID of the creator of the shared memory
entry.
LPID (a,A,p)
The process ID of the last process to attach or
detach the shared memory segment.
ATIME (a,A,t)
The time the last attach was completed to the associated
shared memory segment.
DTIME (a,A,t)
The time the last detach was completed on the associated
shared memory segment.
NSEMS (a,A,b)
The number of semaphores in the set associated with the
semaphore entry.
OTIME (a,A,t)
The time the last semaphore operation was completed on
the set associated with the semaphore entry.
PROJECT (J,A)
The project name of the creator of the facility
entry.
ZONE (Z)
The zone with which the facility is associated.