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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/sigusr2_8c_source.html
author Dominic Pinkman <dominic.pinkman@nokia.com>
Fri, 13 Aug 2010 16:47:46 +0100
changeset 14 578be2adaf3e
parent 6 43e37759235e
permissions -rw-r--r--
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
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<title>TB9.2 Example Applications: examples/PIPS/posixsignals/asyncSignal/src/sigusr2.c Source File</title>
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<link href="tabs.css" rel="stylesheet" type="text/css"/>
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<link href="doxygen.css" rel="stylesheet" type="text/css"/>
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</head>
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<body>
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<!-- Generated by Doxygen 1.6.2 -->
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<h1>examples/PIPS/posixsignals/asyncSignal/src/sigusr2.c</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// sigusr2.c</span>
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<a name="l00002"></a>00002 <span class="comment">//</span>
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<a name="l00003"></a>00003 <span class="comment">// Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).</span>
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<a name="l00004"></a>00004 <span class="comment">// All rights reserved.</span>
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<a name="l00005"></a>00005 <span class="comment">// This component and the accompanying materials are made available</span>
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<a name="l00006"></a>00006 <span class="comment">// under the terms of &quot;Eclipse Public License v1.0&quot;</span>
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<a name="l00007"></a>00007 <span class="comment">// which accompanies this distribution, and is available</span>
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<a name="l00008"></a>00008 <span class="comment">// at the URL &quot;http://www.eclipse.org/legal/epl-v10.html&quot;.</span>
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<a name="l00009"></a>00009 <span class="comment">//</span>
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<a name="l00010"></a>00010 <span class="comment">// Initial Contributors:</span>
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<a name="l00011"></a>00011 <span class="comment">// Nokia Corporation - initial contribution.</span>
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<a name="l00012"></a>00012 <span class="comment">//</span>
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<a name="l00013"></a>00013 <span class="comment">// Contributors:</span>
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<a name="l00014"></a>00014 <span class="comment">//</span>
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<a name="l00015"></a>00015 <span class="comment">// Description: The source file for sigusr2 process.</span>
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<a name="l00016"></a>00016 <span class="comment">//</span>
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<a name="l00017"></a>00017
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<a name="l00018"></a>00018 <span class="preprocessor">#include &lt;stdio.h&gt;</span>
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<a name="l00019"></a>00019 <span class="preprocessor">#include &lt;stdlib.h&gt;</span>
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<a name="l00020"></a>00020 <span class="preprocessor">#include &lt;signal.h&gt;</span>
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<a name="l00021"></a>00021 <span class="preprocessor">#include &lt;unistd.h&gt;</span>
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<a name="l00022"></a>00022 <span class="preprocessor">#include &lt;e32def.h&gt;</span>
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<a name="l00023"></a>00023
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<a name="l00027"></a>00027 <span class="keywordtype">int</span> gVal = TRUE;
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<a name="l00028"></a>00028
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<a name="l00033"></a>00033 <span class="keywordtype">void</span> SIGUSR2_handler(<span class="keywordtype">int</span> signum)
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<a name="l00034"></a>00034     {
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<a name="l00035"></a>00035     <span class="keywordflow">if</span>(signum == SIGUSR2)
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<a name="l00036"></a>00036         {
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<a name="l00037"></a>00037         printf(<span class="stringliteral">&quot;Received the SIGUSR2 signal from the sigusr1 process after reading the file.\n&quot;</span>);
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<a name="l00038"></a>00038         gVal = FALSE;
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<a name="l00039"></a>00039         }
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<a name="l00040"></a>00040     }
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<a name="l00041"></a>00041
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<a name="l00049"></a>00049 <span class="keywordtype">int</span> <a class="code" href="redirectprintf_8c.html#a840291bc02cba5474a4cb46a9b9566fe">main</a>(<span class="keywordtype">int</span> argc,<span class="keywordtype">char</span> **argv)
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<a name="l00050"></a>00050     {
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<a name="l00051"></a>00051     pid_t asyProcsID;
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<a name="l00052"></a>00052     <span class="keywordtype">char</span> ch;
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<a name="l00053"></a>00053     <span class="keywordtype">int</span> ret;
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<a name="l00054"></a>00054     <span class="keywordflow">if</span>(argc &lt; 2)
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<a name="l00055"></a>00055         {
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<a name="l00056"></a>00056         printf(<span class="stringliteral">&quot;Please pass the correct arguments\n&quot;</span>);
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<a name="l00057"></a>00057         <span class="keywordflow">return</span> EXIT_FAILURE;
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<a name="l00058"></a>00058         }
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<a name="l00059"></a>00059     asyProcsID = atoi(argv[1]);  <span class="comment">//The variable holding the sigusr1 process PID.</span>
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<a name="l00060"></a>00060     <span class="comment">// Setup the custom handler for SIGUSR2.</span>
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<a name="l00061"></a>00061     signal(SIGUSR2, SIGUSR2_handler);
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<a name="l00062"></a>00062     printf(<span class="stringliteral">&quot;******************** In the sigusr2 process ********************\n&quot;</span>);
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<a name="l00063"></a>00063
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<a name="l00064"></a>00064     printf(<span class="stringliteral">&quot;\nPress the Enter key to send the SIGUSR1 signal to the sigusr1 process\n&quot;</span>);
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<a name="l00065"></a>00065     getchar();
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<a name="l00066"></a>00066     ret = kill(asyProcsID,SIGUSR1);
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<a name="l00067"></a>00067     <span class="keywordflow">if</span>(ret)
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<a name="l00068"></a>00068         {
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<a name="l00069"></a>00069         printf(<span class="stringliteral">&quot;kill() failed to send signal, errno=%d\n&quot;</span>,errno);
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<a name="l00070"></a>00070         gVal = FALSE;
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<a name="l00071"></a>00071         }
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<a name="l00072"></a>00072
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<a name="l00073"></a>00073     <span class="comment">/* </span>
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<a name="l00074"></a>00074 <span class="comment">     Waiting until a SIGUSR2 signal is obtained from the sigusr1 process.</span>
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<a name="l00075"></a>00075 <span class="comment">     This signal is sent after the aynscFile.txt file has been</span>
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<a name="l00076"></a>00076 <span class="comment">     read and its content written to the console.</span>
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<a name="l00077"></a>00077 <span class="comment">    */</span>
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<a name="l00078"></a>00078     <span class="keywordflow">while</span>(gVal)
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<a name="l00079"></a>00079         {
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<a name="l00080"></a>00080         sleep(0);   <span class="comment">//Initiates signal handling.</span>
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<a name="l00081"></a>00081         }
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<a name="l00082"></a>00082     printf(<span class="stringliteral">&quot;\nPress &#39;e&#39;+Enter to exit from the sigusr2 process\n&quot;</span>);
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<a name="l00083"></a>00083     <span class="keywordflow">while</span>((ch = getchar())!= <span class="charliteral">&#39;e&#39;</span>)
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<a name="l00084"></a>00084         {
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<a name="l00085"></a>00085         <span class="keywordflow">if</span>(ch == <span class="charliteral">&#39;\n&#39;</span>)
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<a name="l00086"></a>00086             <span class="keywordflow">continue</span>;
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<a name="l00087"></a>00087         <span class="keywordflow">else</span>
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<a name="l00088"></a>00088             printf(<span class="stringliteral">&quot;The wrong option was selected, please try again!!!\n&quot;</span>);
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<a name="l00089"></a>00089         }
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<a name="l00090"></a>00090     <span class="keywordflow">return</span> EXIT_SUCCESS;
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<a name="l00091"></a>00091     }
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</pre></div></div>
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<hr size="1"/><address style="text-align: right;"><small>Generated by&nbsp;
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<a href="http://www.doxygen.org/index.html">
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
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</body>
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</html>
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