ipcs

<html> <head> <title>ipcs</title> <META NAME="KEYWORDS" CONTENT="ipcs"> </head> <body BGCOLOR="#ffffff" LINK="#0000ff" VLINK="#0000ff" ALINK="#0000ff" TEXT="#000000"> <center> <h1>ipcs</h1></center> <PRE> <A HREF="/man1/IPCS">IPCS(1)</A> User Commands <A HREF="/man1/IPCS">IPCS(1)</A> NAME ipcs - show information on IPC facilities SYNOPSIS ipcs [options] DESCRIPTION ipcs shows information on the inter-process communication facilities for which the calling process has read access. By default it shows in- formation about all three resources: shared memory segments, message queues, and semaphore arrays. OPTIONS -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 re- source 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 <A HREF="/man2/msgsnd">msgsnd(2)</A> and <A HREF="/man2/msgrcv">msgrcv(2)</A> operations on message queues, the time of the last <A HREF="/man2/shmat">shmat(2)</A> and <A HREF="/man2/shmdt">shmdt(2)</A> operations on shared memory, and the time of the last <A HREF="/man2/semop">semop(2)</A> 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. SEE ALSO <A HREF="/man1/ipcmk">ipcmk(1)</A>, <A HREF="/man1/ipcrm">ipcrm(1)</A>, <A HREF="/man2/msgrcv">msgrcv(2)</A>, <A HREF="/man2/msgsnd">msgsnd(2)</A>, <A HREF="/man2/semget">semget(2)</A>, <A HREF="/man2/semop">semop(2)</A>, <A HREF="/man2/shmat">shmat(2)</A>, <A HREF="/man2/shmdt">shmdt(2)</A>, <A HREF="/man2/shmget">shmget(2)</A> CONFORMING TO The Linux ipcs utility is not fully compatible to the POSIX ipcs util- ity. The Linux version does not support the POSIX -a, -b and -o op- tions, 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. AUTHOR Krishna Balasubramanian <balasub@cis.ohio-state.edu> AVAILABILITY 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/>. util-linux July 2014 <A HREF="/man1/IPCS">IPCS(1)</A></PRE> <center> <h6>Man Pages Copyright Respective Owners. Site Copyright (C) 1994 - 2025 <a href="http://www.he.net">Hurricane Electric</a>. All Rights Reserved.</h6></center> </body> </html>

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