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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><html><head><!-- Copyright 1997 The Open Group, All Rights Reserved --><title>ipcrm</title></head><body bgcolor=white><center><font size=2>The Single UNIX ® Specification, Version 2<br>Copyright © 1997 The Open Group</font></center><hr size=2 noshade><h4><a name = "tag_001_014_985"> </a>NAME</h4><blockquote>ipcrm - remove a message queue, semaphore set or sharedmemory segment identifier</blockquote><h4><a name = "tag_001_014_986"> </a>SYNOPSIS</h4><blockquote><pre><code>ipcrm <b>[</b> -q msgid | -Q msgkey | -s semid | -S semkey | -m shmid | -M shmkey <b>]</b> ...</code></pre></blockquote><h4><a name = "tag_001_014_987"> </a>DESCRIPTION</h4><blockquote>The<i>ipcrm</i>utility removes zero or more message queues, semaphoresets or shared memory segments. The interprocess communicationfacilities to be removed are specified by the options.<p>Only a user with appropriate privilege is allowed to remove aninterprocess communication facility that was not created by orowned by the user invoking<i>ipcrm</i>.</blockquote><h4><a name = "tag_001_014_988"> </a>OPTIONS</h4><blockquote>The<i>ipcrm</i>facility supports the <b>XBD</b> specification, <a href="../xbd/utilconv.html#usg"><b>Utility Syntax Guidelines</b> </a> .<p>The following options are supported:<dl compact><dt><b>-q </b><i>msgid</i><dd>Remove the message queue identifier<i>msgid</i>from the system and destroy the message queue anddata structure associated with it.<dt><b>-m </b><i>shmid</i><dd>Remove the shared memory identifier<i>shmid</i>from the system.The shared memory segment and datastructure associated with it are destroyed afterthe last detach.<dt><b>-s </b><i>semid</i><dd>Remove the semaphore identifier<i>semid</i>from the system and destroy the set of semaphores anddata structure associated with it.<dt><b>-Q </b><i>msgkey</i><dd>Remove the message queue identifier, createdwith key<i>msgkey</i>,from the system and destroy themessage queue and data structure associated with it.<dt><b>-M </b><i>shmkey</i><dd>Remove the shared memory identifier, createdwith key<i>shmkey</i>,from the system.The shared memory segment and data structure associatedwith it are destroyed after the last detach.<dt><b>-S </b><i>semkey</i><dd>Remove the semaphore identifier, created with key<i>semkey</i>,from the system and destroy the setof semaphores and data structure associated with it.</dl></blockquote><h4><a name = "tag_001_014_989"> </a>OPERANDS</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_990"> </a>STDIN</h4><blockquote>Not used.</blockquote><h4><a name = "tag_001_014_991"> </a>INPUT FILES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_992"> </a>ENVIRONMENT VARIABLES</h4><blockquote>The following environment variables affect the execution of<i>ipcrm</i>:<dl compact><dt><i>LANG</i><dd>Provide a default value for the internationalizationvariables that are unset or null.If<i>LANG</i>is unset or null, the corresponding value from theimplementation-dependent default locale will be used.If any of the internationalization variables contain an invalidsetting, the utility will behave as if none of the variables had been set.<dt><i>LC_ALL</i><dd>If set to a non-empty string value, override the valuesof all the other internationalization variables.<dt><i>LC_CTYPE</i><dd>Determine the locale for the interpretation ofsequences of bytes of text data as characters (forexample, single- as opposed to multi-byte characters inarguments).<dt><i>LC_MESSAGES</i><dd>Determine the locale that should be used to affect theformat and contents of diagnostic messages written tostandard error.<dt><i>NLSPATH</i><dd>Determine the location of message catalogues for theprocessing of<i>LC_MESSAGES .</i></dl></blockquote><h4><a name = "tag_001_014_993"> </a>ASYNCHRONOUS EVENTS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_994"> </a>STDOUT</h4><blockquote>Not used.</blockquote><h4><a name = "tag_001_014_995"> </a>STDERR</h4><blockquote>Used only for diagnostic messages.</blockquote><h4><a name = "tag_001_014_996"> </a>OUTPUT FILES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_997"> </a>EXTENDED DESCRIPTION</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_998"> </a>EXIT STATUS</h4><blockquote>The following exit values are returned:<dl compact><dt> 0<dd>Successful completion.<dt>>0<dd>An error occurred.</dl></blockquote><h4><a name = "tag_001_014_999"> </a>CONSEQUENCES OF ERRORS</h4><blockquote>Default.</blockquote><h4><a name = "tag_001_014_1000"> </a>APPLICATION USAGE</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1001"> </a>EXAMPLES</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1002"> </a>FUTURE DIRECTIONS</h4><blockquote>None.</blockquote><h4><a name = "tag_001_014_1003"> </a>SEE ALSO</h4><blockquote><i><a href="ipcs.html">ipcs</a></i>,the <b>XSH</b> specification description of<i><a href="../xsh/msgctl.html">msgctl()</a></i>,<i><a href="../xsh/semctl.html">semctl()</a></i>,<i><a href="../xsh/shmctl.html">shmctl()</a></i>.</blockquote><hr size=2 noshade><center><font size=2>UNIX ® is a registered Trademark of The Open Group.<br>Copyright © 1997 The Open Group<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]</font></center><hr size=2 noshade></body></html>⌨️ 快捷键说明
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