Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/sigusr2_8c-source.html
week 10 bug fix submission: Bug 1892, Bug 1897, Bug 1319. Also 3 or 4 documents were found to contain code blocks with SFL, which has been fixed. Partial fix for broken links, links to Forum Nokia, and the 'Symbian platform' terminology issues.
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<title>TB10.1 Example Applications: examples/PIPS/posixsignals/asyncSignal/src/sigusr2.c Source File</title>
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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>
<a name="l00002"></a>00002 <span class="comment">//</span>
<a name="l00003"></a>00003 <span class="comment">// Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).</span>
<a name="l00004"></a>00004 <span class="comment">// All rights reserved.</span>
<a name="l00005"></a>00005 <span class="comment">// This component and the accompanying materials are made available</span>
<a name="l00006"></a>00006 <span class="comment">// under the terms of "Eclipse Public License v1.0"</span>
<a name="l00007"></a>00007 <span class="comment">// which accompanies this distribution, and is available</span>
<a name="l00008"></a>00008 <span class="comment">// at the URL "http://www.eclipse.org/legal/epl-v10.html".</span>
<a name="l00009"></a>00009 <span class="comment">//</span>
<a name="l00010"></a>00010 <span class="comment">// Initial Contributors:</span>
<a name="l00011"></a>00011 <span class="comment">// Nokia Corporation - initial contribution.</span>
<a name="l00012"></a>00012 <span class="comment">//</span>
<a name="l00013"></a>00013 <span class="comment">// Contributors:</span>
<a name="l00014"></a>00014 <span class="comment">//</span>
<a name="l00015"></a>00015 <span class="comment">// Description: The source file for sigusr2 process.</span>
<a name="l00016"></a>00016 <span class="comment">//</span>
<a name="l00017"></a>00017
<a name="l00018"></a>00018 <span class="preprocessor">#include <stdio.h></span>
<a name="l00019"></a>00019 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00020"></a>00020 <span class="preprocessor">#include <signal.h></span>
<a name="l00021"></a>00021 <span class="preprocessor">#include <unistd.h></span>
<a name="l00022"></a>00022 <span class="preprocessor">#include <e32def.h></span>
<a name="l00023"></a>00023
<a name="l00027"></a>00027 <span class="keywordtype">int</span> gVal = TRUE;
<a name="l00028"></a>00028
<a name="l00033"></a>00033 <span class="keywordtype">void</span> SIGUSR2_handler(<span class="keywordtype">int</span> signum)
<a name="l00034"></a>00034 {
<a name="l00035"></a>00035 <span class="keywordflow">if</span>(signum == SIGUSR2)
<a name="l00036"></a>00036 {
<a name="l00037"></a>00037 printf(<span class="stringliteral">"Received the SIGUSR2 signal from the sigusr1 process after reading the file.\n"</span>);
<a name="l00038"></a>00038 gVal = FALSE;
<a name="l00039"></a>00039 }
<a name="l00040"></a>00040 }
<a name="l00041"></a>00041
<a name="l00049"></a>00049 <span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc,<span class="keywordtype">char</span> **argv)
<a name="l00050"></a>00050 {
<a name="l00051"></a>00051 pid_t asyProcsID = atoi(argv[1]); <span class="comment">//The variable holding the sigusr1 process PID.</span>
<a name="l00052"></a>00052 <span class="keywordtype">char</span> ch;
<a name="l00053"></a>00053 <span class="keywordtype">int</span> ret;
<a name="l00054"></a>00054 <span class="keywordtype">int</span> arg = argc;
<a name="l00055"></a>00055 <span class="comment">// Setup the custom handler for SIGUSR2.</span>
<a name="l00056"></a>00056 signal(SIGUSR2, SIGUSR2_handler);
<a name="l00057"></a>00057 printf(<span class="stringliteral">"******************** In the sigusr2 process ********************\n"</span>);
<a name="l00058"></a>00058
<a name="l00059"></a>00059 printf(<span class="stringliteral">"\nPress the Enter key to send the SIGUSR1 signal to the sigusr1 process\n"</span>);
<a name="l00060"></a>00060 getchar();
<a name="l00061"></a>00061 ret = kill(asyProcsID,SIGUSR1);
<a name="l00062"></a>00062 <span class="keywordflow">if</span>(ret)
<a name="l00063"></a>00063 {
<a name="l00064"></a>00064 printf(<span class="stringliteral">"kill() failed to send signal, errno=%d\n"</span>,errno);
<a name="l00065"></a>00065 gVal = FALSE;
<a name="l00066"></a>00066 }
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="comment">/* </span>
<a name="l00069"></a>00069 <span class="comment"> Waiting until a SIGUSR2 signal is obtained from the sigusr1 process.</span>
<a name="l00070"></a>00070 <span class="comment"> This signal is sent after the aynscFile.txt file has been</span>
<a name="l00071"></a>00071 <span class="comment"> read and its content written to the console.</span>
<a name="l00072"></a>00072 <span class="comment"> */</span>
<a name="l00073"></a>00073 <span class="keywordflow">while</span>(gVal)
<a name="l00074"></a>00074 {
<a name="l00075"></a>00075 sleep(0); <span class="comment">//Initiates signal handling.</span>
<a name="l00076"></a>00076 }
<a name="l00077"></a>00077 printf(<span class="stringliteral">"\nPress 'e'+Enter to exit from the sigusr2 process\n"</span>);
<a name="l00078"></a>00078 <span class="keywordflow">while</span>((ch = getchar())!= <span class="charliteral">'e'</span>)
<a name="l00079"></a>00079 {
<a name="l00080"></a>00080 <span class="keywordflow">if</span>(ch == <span class="charliteral">'\n'</span>)
<a name="l00081"></a>00081 <span class="keywordflow">continue</span>;
<a name="l00082"></a>00082 <span class="keywordflow">else</span>
<a name="l00083"></a>00083 printf(<span class="stringliteral">"The wrong option was selected, please try again!!!\n"</span>);
<a name="l00084"></a>00084 }
<a name="l00085"></a>00085 <span class="keywordflow">return</span> EXIT_SUCCESS;
<a name="l00086"></a>00086 }
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