167 lines
5.0 KiB
Groff
167 lines
5.0 KiB
Groff
.\"
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.\" Copyright (c) 1994 SigmaSoft, Th. Lockert
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by SigmaSoft, Th. Lockert.
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.\" 3. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd June 18, 1994
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.Dt "IPCS" 1
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.Os
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.Sh NAME
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.Nm ipcs
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.Nd report System V interprocess communication facilities status
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.Sh SYNOPSIS
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.Nm
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.Op Fl abcmopqstMQSTy
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.Op Fl C Ar system
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.Op Fl N Ar core
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.Sh DESCRIPTION
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The
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.Nm
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utility provides information on System V interprocess communication
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(IPC) facilities on the system.
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.Pp
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The options are as follows:
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.Bl -tag -width Ds
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.It Fl a
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Show the maximum amount of information possible when
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displaying active semaphores, message queues,
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and shared memory segments.
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(This is shorthand for specifying the
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.Fl b ,
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.Fl c ,
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.Fl o ,
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.Fl p ,
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and
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.Fl t
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options.)
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.It Fl b
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Show the maximum allowed sizes for active semaphores, message queues,
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and shared memory segments. The
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.Dq maximum allowed size
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is the maximum number of bytes in a message on a message queue,
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the size of a shared memory segment,
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or the number of semaphores in a set of semaphores.
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.It Fl c
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Show the creator's name and group for active semaphores, message queues,
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and shared memory segments.
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.It Fl m
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Display information about active shared memory segments.
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.It Fl o
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Show outstanding usage for active message queues,
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and shared memory segments. The
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.Dq outstanding usage
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is the number of messages in a message queue, or the number
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of processes attached to a shared memory segment.
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.It Fl p
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Show the process ID information for active semaphores, message queues,
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and shared memory segments. The
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.Dq process ID information
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is the last process to send a message to or receive a message from
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a message queue,
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the process that created a semaphore, or the last process to attach
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or detach a shared memory segment.
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.It Fl q
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Display information about active message queues.
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.It Fl s
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Display information about active semaphores.
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.It Fl t
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Show access times for active semaphores, message queues,
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and shared memory segments. The access times is the time
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of the last control operation on an IPC object,
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the last send or receive of a message,
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the last attach or detach of a shared memory segment,
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or the last operation on a semaphore.
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.It Fl C Ar system
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Extract the name list from the specified system instead of the
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default
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.Dq Pa /boot/kernel/kernel .
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Implies
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.Fl y .
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.It Fl M
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Display system information about shared memory.
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.It Fl N Ar core
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Extract values associated with the name list from the specified
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core instead of the default
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.Dq Pa /dev/kmem .
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Implies
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.Fl y .
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.It Fl Q
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Display system information about messages queues.
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.It Fl S
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Display system information about semaphores.
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.It Fl T
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Display system information about shared memory, message queues
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and semaphores.
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.It Fl y
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Use the
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.Xr kvm 3
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interface instead of the
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.Xr sysctl 3
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interface to extract the required information.
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If
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.Nm
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is to operate on the running system,
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using
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.Xr kvm 3
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will require read privileges to
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.Pa /dev/kmem .
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.El
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.Pp
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If none of the
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.Fl M ,
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.Fl m ,
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.Fl Q ,
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.Fl q ,
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.Fl S ,
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or
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.Fl s
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options are specified, information about all active IPC facilities is
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listed.
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.Sh RESTRICTIONS
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System data structures may change while
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.Nm
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is running; the output of
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.Nm
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is not guaranteed to be consistent.
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.Sh BUGS
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This manual page is woefully incomplete, because it does not
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at all attempt to explain the information printed by
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.Nm .
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.Sh FILES
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.Bl -tag -width /boot/kernel/kernel -compact
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.It Pa /dev/kmem
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default kernel memory
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.It Pa /boot/kernel/kernel
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default system name list
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.El
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.Sh SEE ALSO
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.Xr ipcrm 1
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.Sh AUTHORS
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.An Thorsten Lockert Aq tholo@sigmasoft.com
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