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.\" 32.Dd June 18, 1994 33.Dt "IPCS" 1 34.Os 35.Sh NAME 36.Nm ipcs 37.Nd report System V interprocess communication facilities status 38.Sh SYNOPSIS 39.Nm 40.Op Fl abcmopqstMQST 41.Op Fl C Ar core 42.Op Fl N Ar system 43.Sh DESCRIPTION 44The 45.Nm 46utility provides information on System V interprocess communication 47(IPC) facilities on the system. 48.Pp 49The options are as follows: 50.Bl -tag -width Ds 51.It Fl a 52Show the maximum amount of information possible when 53displaying active semaphores, message queues, 54and shared memory segments. 55(This is shorthand for specifying the 56.Fl b , 57.Fl c , 58.Fl o , 59.Fl p , 60and 61.Fl t 62options.) 63.It Fl b 64Show the maximum allowed sizes for active semaphores, message queues, 65and shared memory segments. The 66.Dq maximum allowed size 67is the maximum number of bytes in a message on a message queue, 68the size of a shared memory segment, 69or the number of semaphores in a set of semaphores. 70.It Fl c 71Show the creator's name and group for active semaphores, message queues, 72and shared memory segments. 73.It Fl m 74Display information about active shared memory segments. 75.It Fl o 76Show outstanding usage for active message queues, 77and shared memory segments. The 78.Dq outstanding usage 79is the number of messages in a message queue, or the number 80of processes attached to a shared memory segment. 81.It Fl p 82Show the process ID information for active semaphores, message queues, 83and shared memory segments. The 84.Dq process ID information 85is the last process to send a message to or receive a message from 86a message queue, 87the process that created a semaphore, or the last process to attach 88or detach a shared memory segment. 89.It Fl q 90Display information about active message queues. 91.It Fl s 92Display information about active semaphores. 93.It Fl t 94Show access times for active semaphores, message queues, 95and shared memory segments. The access times is the time 96of the last control operation on an IPC object, 97the last send or receive of a message, 98the last attach or detach of a shared memory segment, 99or the last operation on a semaphore. 100.It Fl C Ar core 101Extract values associated with the name list from the specified 102core instead of the default 103.Dq Pa /dev/kmem . 104.It Fl M 105Display system information about shared memory. 106.It Fl N Ar system 107Extract the name list from the specified system instead of the 108default 109.Dq Pa /kernel . 110.It Fl Q 111Display system information about messages queues. 112.It Fl S 113Display system information about semaphores. 114.It Fl T 115Display system information about shared memory, message queues 116and semaphores. 117.El 118.Pp 119If none of the 120.Fl M , 121.Fl m , 122.Fl Q , 123.Fl q , 124.Fl S , 125or 126.Fl s 127options are specified, information about all active IPC facilities is 128listed. 129.Sh RESTRICTIONS 130System data structures may change while 131.Nm 132is running; the output of 133.Nm 134is not guaranteed to be consistent. 135.Sh BUGS 136This manual page is woefully incomplete, because it does not 137at all attempt to explain the information printed by 138.Nm . 139.Sh FILES 140.Bl -tag -width /etc/passwd -compact 141.It Pa /dev/kmem 142default kernel memory 143.It Pa /kernel 144default system name list 145.El 146.Sh SEE ALSO 147.Xr ipcrm 1 148.Sh AUTHORS 149.An Thorsten Lockert Aq tholo@sigmasoft.com 150