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<title>ipcrm</title>
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<basefont size="3"> <a name="ipcrm"></a> <a name="tag_04_68"></a><!-- ipcrm -->
<!--header start-->
<center><font size="2">The Open Group Base Specifications Issue 6<br>
IEEE Std 1003.1-2001<br>
Copyright &copy; 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
<!--header end-->
<hr size="2" noshade>
<h4><a name="tag_04_68_01"></a>NAME</h4>
<blockquote>ipcrm - remove an XSI message queue, semaphore set, or shared memory segment identifier</blockquote>
<h4><a name="tag_04_68_02"></a>SYNOPSIS</h4>
<blockquote class="synopsis">
<div class="box"><code><tt><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../images/opt-start.gif" alt=
"[Option Start]" border="0"> ipcrm</tt> <b>[</b> <tt>-q msgid | -Q msgkey | -s semid | -S semkey |<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -m shmid | -M shmkey</tt> <b>]</b> <tt>... <img src="../images/opt-end.gif" alt=
"[Option End]" border="0"></tt></code></div>
</blockquote>
<h4><a name="tag_04_68_03"></a>DESCRIPTION</h4>
<blockquote>
<p>The <i>ipcrm</i> utility shall remove zero or more message queues, semaphore sets, or shared memory segments. The interprocess
communication facilities to be removed are specified by the options.</p>
<p>Only a user with appropriate privilege shall be allowed to remove an interprocess communication facility that was not created by
or owned by the user invoking <i>ipcrm</i>.</p>
</blockquote>
<h4><a name="tag_04_68_04"></a>OPTIONS</h4>
<blockquote>
<p>The <i>ipcrm</i> facility supports the Base Definitions volume of IEEE&nbsp;Std&nbsp;1003.1-2001, <a href=
"../basedefs/xbd_chap12.html#tag_12_02">Section 12.2, Utility Syntax Guidelines</a>.</p>
<p>The following options shall be supported:</p>
<dl compact>
<dt><b>-q&nbsp;</b> <i>msgid</i></dt>
<dd>Remove the message queue identifier <i>msgid</i> from the system and destroy the message queue and data structure associated
with it.</dd>
<dt><b>-m&nbsp;</b> <i>shmid</i></dt>
<dd>Remove the shared memory identifier <i>shmid</i> from the system. The shared memory segment and data structure associated with
it shall be destroyed after the last detach.</dd>
<dt><b>-s&nbsp;</b> <i>semid</i></dt>
<dd>Remove the semaphore identifier <i>semid</i> from the system and destroy the set of semaphores and data structure associated
with it.</dd>
<dt><b>-Q&nbsp;</b> <i>msgkey</i></dt>
<dd>Remove the message queue identifier, created with key <i>msgkey</i>, from the system and destroy the message queue and data
structure associated with it.</dd>
<dt><b>-M&nbsp;</b> <i>shmkey</i></dt>
<dd>Remove the shared memory identifier, created with key <i>shmkey</i>, from the system. The shared memory segment and data
structure associated with it shall be destroyed after the last detach.</dd>
<dt><b>-S&nbsp;</b> <i>semkey</i></dt>
<dd>Remove the semaphore identifier, created with key <i>semkey</i>, from the system and destroy the set of semaphores and data
structure associated with it.</dd>
</dl>
</blockquote>
<h4><a name="tag_04_68_05"></a>OPERANDS</h4>
<blockquote>
<p>None.</p>
</blockquote>
<h4><a name="tag_04_68_06"></a>STDIN</h4>
<blockquote>
<p>Not used.</p>
</blockquote>
<h4><a name="tag_04_68_07"></a>INPUT FILES</h4>
<blockquote>
<p>None.</p>
</blockquote>
<h4><a name="tag_04_68_08"></a>ENVIRONMENT VARIABLES</h4>
<blockquote>
<p>The following environment variables shall affect the execution of <i>ipcrm</i>:</p>
<dl compact>
<dt><i>LANG</i></dt>
<dd>Provide a default value for the internationalization variables that are unset or null. (See the Base Definitions volume of
IEEE&nbsp;Std&nbsp;1003.1-2001, <a href="../basedefs/xbd_chap08.html#tag_08_02">Section 8.2, Internationalization Variables</a> for
the precedence of internationalization variables used to determine the values of locale categories.)</dd>
<dt><i>LC_ALL</i></dt>
<dd>If set to a non-empty string value, override the values of all the other internationalization variables.</dd>
<dt><i>LC_CTYPE</i></dt>
<dd>Determine the locale for the interpretation of sequences of bytes of text data as characters (for example, single-byte as
opposed to multi-byte characters in arguments).</dd>
<dt><i>LC_MESSAGES</i></dt>
<dd>Determine the locale that should be used to affect the format and contents of diagnostic messages written to standard
error.</dd>
<dt><i>NLSPATH</i></dt>
<dd>Determine the location of message catalogs for the processing of <i>LC_MESSAGES .</i></dd>
</dl>
</blockquote>
<h4><a name="tag_04_68_09"></a>ASYNCHRONOUS EVENTS</h4>
<blockquote>
<p>Default.</p>
</blockquote>
<h4><a name="tag_04_68_10"></a>STDOUT</h4>
<blockquote>
<p>Not used.</p>
</blockquote>
<h4><a name="tag_04_68_11"></a>STDERR</h4>
<blockquote>
<p>The standard error shall be used only for diagnostic messages.</p>
</blockquote>
<h4><a name="tag_04_68_12"></a>OUTPUT FILES</h4>
<blockquote>
<p>None.</p>
</blockquote>
<h4><a name="tag_04_68_13"></a>EXTENDED DESCRIPTION</h4>
<blockquote>
<p>None.</p>
</blockquote>
<h4><a name="tag_04_68_14"></a>EXIT STATUS</h4>
<blockquote>
<p>The following exit values shall be returned:</p>
<dl compact>
<dt>&nbsp;0</dt>
<dd>Successful completion.</dd>
<dt>&gt;0</dt>
<dd>An error occurred.</dd>
</dl>
</blockquote>
<h4><a name="tag_04_68_15"></a>CONSEQUENCES OF ERRORS</h4>
<blockquote>
<p>Default.</p>
</blockquote>
<hr>
<div class="box"><em>The following sections are informative.</em></div>
<h4><a name="tag_04_68_16"></a>APPLICATION USAGE</h4>
<blockquote>
<p>None.</p>
</blockquote>
<h4><a name="tag_04_68_17"></a>EXAMPLES</h4>
<blockquote>
<p>None.</p>
</blockquote>
<h4><a name="tag_04_68_18"></a>RATIONALE</h4>
<blockquote>
<p>None.</p>
</blockquote>
<h4><a name="tag_04_68_19"></a>FUTURE DIRECTIONS</h4>
<blockquote>
<p>None.</p>
</blockquote>
<h4><a name="tag_04_68_20"></a>SEE ALSO</h4>
<blockquote>
<p><a href="ipcs.html"><i>ipcs</i></a> , the System Interfaces volume of IEEE&nbsp;Std&nbsp;1003.1-2001, <a href=
"../functions/msgctl.html"><i>msgctl</i>()</a>, <a href="../functions/semctl.html"><i>semctl</i>()</a>, <a href=
"../functions/shmctl.html"><i>shmctl</i>()</a></p>
</blockquote>
<h4><a name="tag_04_68_21"></a>CHANGE HISTORY</h4>
<blockquote>
<p>First released in Issue 5.</p>
</blockquote>
<div class="box"><em>End of informative text.</em></div>
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