1.\" 2.\" Copyright (c) 1994 SigmaSoft, Th. Lockert 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 3. All advertising materials mentioning features or use of this software 14.\" must display the following acknowledgement: 15.\" This product includes software developed by SigmaSoft, Th. Lockert. 16.\" 3. The name of the author may not be used to endorse or promote products 17.\" derived from this software without specific prior written permission 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29.\" 30.\" $FreeBSD: src/usr.bin/ipcs/ipcs.1,v 1.9.2.4 2003/04/08 11:07:51 tjr Exp $ 31.\" $DragonFly: src/usr.bin/ipcs/ipcs.1,v 1.2 2003/06/17 04:29:27 dillon Exp $ 32.\" 33.Dd June 18, 1994 34.Dt "IPCS" 1 35.Os 36.Sh NAME 37.Nm ipcs 38.Nd report System V interprocess communication facilities status 39.Sh SYNOPSIS 40.Nm 41.Op Fl abcmopqstMQST 42.Op Fl C Ar core 43.Op Fl N Ar system 44.Sh DESCRIPTION 45The 46.Nm 47utility provides information on System V interprocess communication 48(IPC) facilities on the system. 49.Pp 50The options are as follows: 51.Bl -tag -width Ds 52.It Fl a 53Show the maximum amount of information possible when 54displaying active semaphores, message queues, 55and shared memory segments. 56(This is shorthand for specifying the 57.Fl b , 58.Fl c , 59.Fl o , 60.Fl p , 61and 62.Fl t 63options.) 64.It Fl b 65Show the maximum allowed sizes for active semaphores, message queues, 66and shared memory segments. The 67.Dq maximum allowed size 68is the maximum number of bytes in a message on a message queue, 69the size of a shared memory segment, 70or the number of semaphores in a set of semaphores. 71.It Fl c 72Show the creator's name and group for active semaphores, message queues, 73and shared memory segments. 74.It Fl m 75Display information about active shared memory segments. 76.It Fl o 77Show outstanding usage for active message queues, 78and shared memory segments. The 79.Dq outstanding usage 80is the number of messages in a message queue, or the number 81of processes attached to a shared memory segment. 82.It Fl p 83Show the process ID information for active semaphores, message queues, 84and shared memory segments. The 85.Dq process ID information 86is the last process to send a message to or receive a message from 87a message queue, 88the process that created a semaphore, or the last process to attach 89or detach a shared memory segment. 90.It Fl q 91Display information about active message queues. 92.It Fl s 93Display information about active semaphores. 94.It Fl t 95Show access times for active semaphores, message queues, 96and shared memory segments. The access times is the time 97of the last control operation on an IPC object, 98the last send or receive of a message, 99the last attach or detach of a shared memory segment, 100or the last operation on a semaphore. 101.It Fl C Ar core 102Extract values associated with the name list from the specified 103core instead of the default 104.Dq Pa /dev/kmem . 105.It Fl M 106Display system information about shared memory. 107.It Fl N Ar system 108Extract the name list from the specified system instead of the 109default 110.Dq Pa /kernel . 111.It Fl Q 112Display system information about messages queues. 113.It Fl S 114Display system information about semaphores. 115.It Fl T 116Display system information about shared memory, message queues 117and semaphores. 118.El 119.Pp 120If none of the 121.Fl M , 122.Fl m , 123.Fl Q , 124.Fl q , 125.Fl S , 126or 127.Fl s 128options are specified, information about all active IPC facilities is 129listed. 130.Sh RESTRICTIONS 131System data structures may change while 132.Nm 133is running; the output of 134.Nm 135is not guaranteed to be consistent. 136.Sh BUGS 137This manual page is woefully incomplete, because it does not 138at all attempt to explain the information printed by 139.Nm . 140.Sh FILES 141.Bl -tag -width /etc/passwd -compact 142.It Pa /dev/kmem 143default kernel memory 144.It Pa /kernel 145default system name list 146.El 147.Sh SEE ALSO 148.Xr ipcrm 1 149.Sh AUTHORS 150.An Thorsten Lockert Aq tholo@sigmasoft.com 151