1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>ipc_lock</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="The Linux Kernel API"><link rel="up" href="ipc.html#idp1124933524" title="IPC utilities"><link rel="prev" href="API-ipc-obtain-object.html" title="ipc_obtain_object"><link rel="next" href="API-ipc-obtain-object-check.html" title="ipc_obtain_object_check"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">ipc_lock</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-ipc-obtain-object.html">Prev</a>&#160;</td><th width="60%" align="center">IPC utilities</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-ipc-obtain-object-check.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-ipc-lock"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>ipc_lock &#8212; 
2     lock an ipc structure without rwsem held
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">struct kern_ipc_perm * <b class="fsfunc">ipc_lock </b>(</code></td><td>struct ipc_ids * <var class="pdparam">ids</var>, </td></tr><tr><td>&#160;</td><td>int <var class="pdparam">id</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1125097844"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>ids</code></em></span></dt><dd><p>
4     ipc identifier set
5    </p></dd><dt><span class="term"><em class="parameter"><code>id</code></em></span></dt><dd><p>
6     ipc id to look for
7    </p></dd></dl></div></div><div class="refsect1"><a name="idp1125100452"></a><h2>Description</h2><p>
8   Look for an id in the ipc ids idr and lock the associated ipc object.
9   </p><p>
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11   The ipc object is locked on successful exit.
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