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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | CONFORMING TO | AUTHOR | AVAILABILITY | COLOPHON |
IPCS(1) User Commands IPCS(1)
ipcs - show information on IPC facilities
ipcs [options]
ipcs shows information on the inter-process communication facilities
for which the calling process has read access. By default it shows
information about all three resources: shared memory segments,
message queues, and semaphore arrays.
-i, --id id
Show full details on just the one resource element identified
by id. This option needs to be combined with one of the three
resource options: -m, -q or -s.
-h, --help
Display help text and exit.
-V, --version
Display version information and exit.
Resource options
-m, --shmems
Write information about active shared memory segments.
-q, --queues
Write information about active message queues.
-s, --semaphores
Write information about active semaphore sets.
-a, --all
Write information about all three resources (default).
Output formats
Of these options only one takes effect: the last one specified.
-c, --creator
Show creator and owner.
-l, --limits
Show resource limits.
-p, --pid
Show PIDs of creator and last operator.
-t, --time
Write time information. The time of the last control
operation that changed the access permissions for all
facilities, the time of the last msgsnd(2) and msgrcv(2)
operations on message queues, the time of the last shmat(2)
and shmdt(2) operations on shared memory, and the time of the
last semop(2) operation on semaphores.
-u, --summary
Show status summary.
Representation
These affect only the -l (--limits) option.
-b, --bytes
Print sizes in bytes.
--human
Print sizes in human-readable format.
ipcmk(1), ipcrm(1), msgrcv(2), msgsnd(2), semget(2), semop(2),
shmat(2), shmdt(2), shmget(2)
The Linux ipcs utility is not fully compatible to the POSIX ipcs
utility. The Linux version does not support the POSIX -a, -b and -o
options, but does support the -l and -u options not defined by POSIX.
A portable application shall not use the -a, -b, -o, -l, and -u
options.
Krishna Balasubramanian ⟨balasub@cis.ohio-state.edu⟩
The ipcs command is part of the util-linux package and is available
from Linux Kernel Archive
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩.
This page is part of the util-linux (a random collection of Linux
utilities) project. Information about the project can be found at
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have a
bug report for this manual page, send it to
util-linux@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
2017-07-05. If you discover any rendering problems in this HTML ver‐
sion of the page, or you believe there is a better or more up-to-date
source for the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original man‐
ual page), send a mail to man-pages@man7.org
util-linux July 2014 IPCS(1)
Pages that refer to this page: ipcmk(1), ipcrm(1), msgctl(2), semctl(2), shmctl(2), proc(5), svipc(7)