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 September 2, 2008 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.Op Fl g Ar group 44.Op Fl u Ar user 45.Sh DESCRIPTION 46The 47.Nm 48utility provides information on System V interprocess communication 49(IPC) facilities on the system. 50.Pp 51The options are as follows: 52.Bl -tag -width Ds 53.It Fl a 54Show the maximum amount of information possible when 55displaying active semaphores, message queues, 56and shared memory segments. 57(This is shorthand for specifying the 58.Fl b , 59.Fl c , 60.Fl o , 61.Fl p , 62and 63.Fl t 64options.) 65.It Fl b 66Show the maximum allowed sizes for active semaphores, message queues, 67and shared memory segments. The 68.Dq maximum allowed size 69is the maximum number of bytes in a message on a message queue, 70the size of a shared memory segment, 71or the number of semaphores in a set of semaphores. 72.It Fl c 73Show the creator's name and group for active semaphores, message queues, 74and shared memory segments. 75.It Fl g Ar group 76Display information about IPC mechanisms owned by 77.Pa group . 78Group specification can be in the form of a numeric GID or 79a group name. 80.It Fl m 81Display information about active shared memory segments. 82.It Fl o 83Show outstanding usage for active message queues, 84and shared memory segments. The 85.Dq outstanding usage 86is the number of messages in a message queue, or the number 87of processes attached to a shared memory segment. 88.It Fl p 89Show the process ID information for active semaphores, message queues, 90and shared memory segments. The 91.Dq process ID information 92is the last process to send a message to or receive a message from 93a message queue, 94the process that created a semaphore, or the last process to attach 95or detach a shared memory segment. 96.It Fl q 97Display information about active message queues. 98.It Fl s 99Display information about active semaphores. 100.It Fl t 101Show access times for active semaphores, message queues, 102and shared memory segments. The access times is the time 103of the last control operation on an IPC object, 104the last send or receive of a message, 105the last attach or detach of a shared memory segment, 106or the last operation on a semaphore. 107.It Fl u Ar user 108Display information about IPC mechanisms owned by 109.Pa user . 110User specification can be in the form of a numeric UID or 111a user name. 112.It Fl C Ar core 113Extract values associated with the name list from the specified 114core instead of the default 115.Dq Pa /dev/kmem . 116.It Fl M 117Display system information about shared memory. 118.It Fl N Ar system 119Extract the name list from the specified system instead of the 120default 121.Dq Pa /boot/kernel . 122.It Fl Q 123Display system information about messages queues. 124.It Fl S 125Display system information about semaphores. 126.It Fl T 127Display system information about shared memory, message queues 128and semaphores. 129.El 130.Pp 131If none of the 132.Fl M , 133.Fl m , 134.Fl Q , 135.Fl q , 136.Fl S , 137or 138.Fl s 139options are specified, information about all active IPC facilities is 140listed. 141.Sh RESTRICTIONS 142System data structures may change while 143.Nm 144is running; the output of 145.Nm 146is not guaranteed to be consistent. 147.Sh FILES 148.Bl -tag -width /etc/passwd -compact 149.It Pa /dev/kmem 150default kernel memory 151.It Pa /boot/kernel 152default system name list 153.El 154.Sh SEE ALSO 155.Xr ipcrm 1 156.Sh AUTHORS 157.An Thorsten Lockert Aq Mt tholo@sigmasoft.com 158.Sh BUGS 159This manual page is woefully incomplete, because it does not 160at all attempt to explain the information printed by 161.Nm . 162