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11 <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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12 <a name="l00002"></a>00002 <span class="comment">//</span> |
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13 <a name="l00003"></a>00003 <span class="comment">// Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).</span> |
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14 <a name="l00004"></a>00004 <span class="comment">// All rights reserved.</span> |
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15 <a name="l00005"></a>00005 <span class="comment">// This component and the accompanying materials are made available</span> |
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16 <a name="l00006"></a>00006 <span class="comment">// under the terms of "Eclipse Public License v1.0"</span> |
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17 <a name="l00007"></a>00007 <span class="comment">// which accompanies this distribution, and is available</span> |
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18 <a name="l00008"></a>00008 <span class="comment">// at the URL "http://www.eclipse.org/legal/epl-v10.html".</span> |
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19 <a name="l00009"></a>00009 <span class="comment">//</span> |
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20 <a name="l00010"></a>00010 <span class="comment">// Initial Contributors:</span> |
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21 <a name="l00011"></a>00011 <span class="comment">// Nokia Corporation - initial contribution.</span> |
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22 <a name="l00012"></a>00012 <span class="comment">//</span> |
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23 <a name="l00013"></a>00013 <span class="comment">// Contributors:</span> |
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24 <a name="l00014"></a>00014 <span class="comment">//</span> |
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25 <a name="l00015"></a>00015 <span class="comment">// Description: The source file for sigusr2 process.</span> |
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26 <a name="l00016"></a>00016 <span class="comment">//</span> |
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27 <a name="l00017"></a>00017 |
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28 <a name="l00018"></a>00018 <span class="preprocessor">#include <stdio.h></span> |
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29 <a name="l00019"></a>00019 <span class="preprocessor">#include <stdlib.h></span> |
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30 <a name="l00020"></a>00020 <span class="preprocessor">#include <signal.h></span> |
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31 <a name="l00021"></a>00021 <span class="preprocessor">#include <unistd.h></span> |
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32 <a name="l00022"></a>00022 <span class="preprocessor">#include <e32def.h></span> |
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33 <a name="l00023"></a>00023 |
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34 <a name="l00027"></a>00027 <span class="keywordtype">int</span> gVal = TRUE; |
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35 <a name="l00028"></a>00028 |
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36 <a name="l00033"></a>00033 <span class="keywordtype">void</span> SIGUSR2_handler(<span class="keywordtype">int</span> signum) |
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37 <a name="l00034"></a>00034 { |
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38 <a name="l00035"></a>00035 <span class="keywordflow">if</span>(signum == SIGUSR2) |
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39 <a name="l00036"></a>00036 { |
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40 <a name="l00037"></a>00037 printf(<span class="stringliteral">"Received the SIGUSR2 signal from the sigusr1 process after reading the file.\n"</span>); |
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41 <a name="l00038"></a>00038 gVal = FALSE; |
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42 <a name="l00039"></a>00039 } |
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43 <a name="l00040"></a>00040 } |
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44 <a name="l00041"></a>00041 |
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45 <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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46 <a name="l00050"></a>00050 { |
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47 <a name="l00051"></a>00051 pid_t asyProcsID; |
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48 <a name="l00052"></a>00052 <span class="keywordtype">char</span> ch; |
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49 <a name="l00053"></a>00053 <span class="keywordtype">int</span> ret; |
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50 <a name="l00054"></a>00054 <span class="keywordflow">if</span>(argc < 2) |
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51 <a name="l00055"></a>00055 { |
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52 <a name="l00056"></a>00056 printf(<span class="stringliteral">"Please pass the correct arguments\n"</span>); |
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53 <a name="l00057"></a>00057 <span class="keywordflow">return</span> EXIT_FAILURE; |
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54 <a name="l00058"></a>00058 } |
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55 <a name="l00059"></a>00059 asyProcsID = atoi(argv[1]); <span class="comment">//The variable holding the sigusr1 process PID.</span> |
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56 <a name="l00060"></a>00060 <span class="comment">// Setup the custom handler for SIGUSR2.</span> |
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57 <a name="l00061"></a>00061 signal(SIGUSR2, SIGUSR2_handler); |
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58 <a name="l00062"></a>00062 printf(<span class="stringliteral">"******************** In the sigusr2 process ********************\n"</span>); |
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59 <a name="l00063"></a>00063 |
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60 <a name="l00064"></a>00064 printf(<span class="stringliteral">"\nPress the Enter key to send the SIGUSR1 signal to the sigusr1 process\n"</span>); |
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61 <a name="l00065"></a>00065 getchar(); |
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62 <a name="l00066"></a>00066 ret = kill(asyProcsID,SIGUSR1); |
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63 <a name="l00067"></a>00067 <span class="keywordflow">if</span>(ret) |
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64 <a name="l00068"></a>00068 { |
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65 <a name="l00069"></a>00069 printf(<span class="stringliteral">"kill() failed to send signal, errno=%d\n"</span>,errno); |
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66 <a name="l00070"></a>00070 gVal = FALSE; |
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67 <a name="l00071"></a>00071 } |
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68 <a name="l00072"></a>00072 |
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69 <a name="l00073"></a>00073 <span class="comment">/* </span> |
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70 <a name="l00074"></a>00074 <span class="comment"> Waiting until a SIGUSR2 signal is obtained from the sigusr1 process.</span> |
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71 <a name="l00075"></a>00075 <span class="comment"> This signal is sent after the aynscFile.txt file has been</span> |
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72 <a name="l00076"></a>00076 <span class="comment"> read and its content written to the console.</span> |
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73 <a name="l00077"></a>00077 <span class="comment"> */</span> |
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74 <a name="l00078"></a>00078 <span class="keywordflow">while</span>(gVal) |
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75 <a name="l00079"></a>00079 { |
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76 <a name="l00080"></a>00080 sleep(0); <span class="comment">//Initiates signal handling.</span> |
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77 <a name="l00081"></a>00081 } |
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78 <a name="l00082"></a>00082 printf(<span class="stringliteral">"\nPress 'e'+Enter to exit from the sigusr2 process\n"</span>); |
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79 <a name="l00083"></a>00083 <span class="keywordflow">while</span>((ch = getchar())!= <span class="charliteral">'e'</span>) |
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80 <a name="l00084"></a>00084 { |
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81 <a name="l00085"></a>00085 <span class="keywordflow">if</span>(ch == <span class="charliteral">'\n'</span>) |
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82 <a name="l00086"></a>00086 <span class="keywordflow">continue</span>; |
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83 <a name="l00087"></a>00087 <span class="keywordflow">else</span> |
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84 <a name="l00088"></a>00088 printf(<span class="stringliteral">"The wrong option was selected, please try again!!!\n"</span>); |
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85 <a name="l00089"></a>00089 } |
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86 <a name="l00090"></a>00090 <span class="keywordflow">return</span> EXIT_SUCCESS; |
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87 <a name="l00091"></a>00091 } |
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88 </pre></div></div> |
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