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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/ipcparent_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/IPC/src/parent/ipcparent.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/IPC/src/parent/ipcparent.c</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// ipcparent.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) 2007-2009 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:</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="comment">//</span>
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<a name="l00019"></a>00019
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<a name="l00020"></a>00020 <span class="preprocessor">#include &lt;stdio.h&gt;</span>
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<a name="l00021"></a>00021 <span class="preprocessor">#include &lt;fcntl.h&gt;</span>
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<a name="l00022"></a>00022 <span class="preprocessor">#include &lt;unistd.h&gt;</span>
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<a name="l00023"></a>00023 <span class="preprocessor">#include &lt;stdlib.h&gt;</span>
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<a name="l00024"></a>00024 <span class="preprocessor">#include &lt;sys/stat.h&gt;</span>
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<a name="l00025"></a>00025 <span class="preprocessor">#include &lt;errno.h&gt;</span>
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<a name="l00026"></a>00026 <span class="preprocessor">#include &lt;spawn.h&gt;</span>
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<a name="l00027"></a>00027 <span class="preprocessor">#include &lt;string.h&gt;</span>
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<a name="l00028"></a>00028 <span class="preprocessor">#include &lt;sys/wait.h&gt;</span>
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<a name="l00029"></a>00029
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<a name="l00034"></a>00034 <span class="keywordtype">char</span> PressKey()
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<a name="l00035"></a>00035         {
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<a name="l00036"></a>00036         <span class="keywordtype">char</span> ch;
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<a name="l00037"></a>00037         fflush(stdout);
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<a name="l00038"></a>00038         ch=getchar();
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<a name="l00039"></a>00039         <span class="keywordflow">return</span> ch;
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<a name="l00040"></a>00040         }
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<a name="l00041"></a>00041
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<a name="l00047"></a>00047 <span class="keywordtype">int</span> Error(<span class="keywordtype">char</span> msg[])
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<a name="l00048"></a>00048         {
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<a name="l00050"></a>00050         printf(<span class="stringliteral">&quot;%s [Error NUMBER = %d]\n&quot;</span>,msg,errno);
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<a name="l00051"></a>00051         PressKey();
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<a name="l00052"></a>00052         <span class="keywordflow">return</span> EXIT_FAILURE;
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<a name="l00053"></a>00053         }
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<a name="l00054"></a>00054
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<a name="l00055"></a>00055 <span class="keywordtype">int</span> <a class="code" href="redirectprintf_8c.html#a840291bc02cba5474a4cb46a9b9566fe">main</a>()
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<a name="l00056"></a>00056         {
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<a name="l00058"></a>00058         FILE* childProcessStream;
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<a name="l00060"></a>00060         <span class="keywordtype">char</span> fifoFileName[] = <span class="stringliteral">&quot;myfifofile&quot;</span>;
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<a name="l00062"></a>00062         <span class="keywordtype">char</span> fifoExecFileName[] = <span class="stringliteral">&quot;z:\\sys\\bin\\fifochild&quot;</span>;
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<a name="l00064"></a>00064         <span class="keywordtype">char</span> popenExecFileName[] = <span class="stringliteral">&quot;z:\\sys\\bin\\ipcchild&quot;</span>;
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<a name="l00066"></a>00066         pid_t fifoChildPid;
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<a name="l00068"></a>00068         <span class="keywordtype">int</span> fifoRetVal;
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<a name="l00069"></a>00069         <span class="keywordtype">int</span> unlinkResult;
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<a name="l00070"></a>00070         <span class="keywordtype">int</span> fifoResult;
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<a name="l00072"></a>00072         <span class="keywordtype">int</span>     childProcessFD;
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<a name="l00073"></a>00073
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<a name="l00074"></a>00074         <span class="keywordtype">char</span> **argv=(<span class="keywordtype">char</span>**)malloc(2*<span class="keyword">sizeof</span>(<span class="keywordtype">char</span>*));
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<a name="l00075"></a>00075     argv[0]=(<span class="keywordtype">char</span>*)malloc(50*<span class="keyword">sizeof</span>(<span class="keywordtype">char</span>));
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<a name="l00076"></a>00076         argv[1] = 0;
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<a name="l00077"></a>00077         strcpy(argv[0], fifoExecFileName);
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<a name="l00078"></a>00078
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<a name="l00082"></a>00082     unlinkResult=unlink(fifoFileName);
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<a name="l00083"></a>00083         fifoResult = mkfifo(fifoFileName,S_IXGRP);
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<a name="l00085"></a>00085         <span class="keywordflow">if</span>(fifoResult == -1)
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<a name="l00086"></a>00086                 {
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<a name="l00087"></a>00087                         Error(<span class="stringliteral">&quot;*** failure mkfifo ***&quot;</span>);
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<a name="l00088"></a>00088                         PressKey();
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<a name="l00089"></a>00089                         <span class="keywordflow">return</span> EXIT_FAILURE;
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<a name="l00090"></a>00090                 }
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<a name="l00092"></a>00092         fifoRetVal  = posix_spawn(&amp;fifoChildPid, fifoExecFileName, NULL, NULL, argv, (<span class="keywordtype">char</span>**)NULL);
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<a name="l00094"></a>00094         free((<span class="keywordtype">void</span>*)argv[0]);
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<a name="l00095"></a>00095         free((<span class="keywordtype">void</span>*)argv);
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<a name="l00096"></a>00096         <span class="keywordflow">if</span>(fifoRetVal != 0)
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<a name="l00097"></a>00097                 {
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<a name="l00098"></a>00098                 printf(<span class="stringliteral">&quot;failure posix_spawn [Error NUMBER = %d]\n&quot;</span>,errno);
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<a name="l00099"></a>00099         unlinkResult=unlink(fifoFileName);
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<a name="l00100"></a>00100         <span class="keywordflow">if</span>(unlinkResult!=0)
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<a name="l00101"></a>00101             {
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<a name="l00102"></a>00102             printf(<span class="stringliteral">&quot;failure posix_spawn [Error NUMBER = %d]\n&quot;</span>,errno);
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<a name="l00103"></a>00103             }
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<a name="l00104"></a>00104                 PressKey();
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<a name="l00105"></a>00105                 <span class="keywordflow">return</span> EXIT_FAILURE;
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<a name="l00106"></a>00106                 }
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<a name="l00107"></a>00107         <span class="keywordflow">else</span>
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<a name="l00108"></a>00108                 {
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<a name="l00110"></a>00110                 <span class="keywordtype">int</span> fifoFd = open(fifoFileName,O_RDONLY);
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<a name="l00112"></a>00112                 <span class="keywordflow">if</span>(fifoFd == -1)
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<a name="l00113"></a>00113                         {
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<a name="l00115"></a>00115                         Error(<span class="stringliteral">&quot;*** failure FIFO Open ***&quot;</span>);
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<a name="l00116"></a>00116                         PressKey();
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<a name="l00117"></a>00117                         <span class="keywordflow">return</span> EXIT_FAILURE;
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<a name="l00118"></a>00118                         }
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<a name="l00119"></a>00119                 <span class="keywordflow">else</span>
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<a name="l00120"></a>00120                         {
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<a name="l00122"></a>00122                         <span class="keywordtype">char</span> buffer[100];
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<a name="l00123"></a>00123                         <span class="keywordtype">int</span> nbytes;
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<a name="l00124"></a>00124                         memset(buffer,0,<span class="keyword">sizeof</span>(buffer));
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<a name="l00126"></a>00126                         nbytes = read(fifoFd,buffer,<span class="keyword">sizeof</span>(buffer));
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<a name="l00127"></a>00127                         printf(<span class="stringliteral">&quot;\nBytes Received=%d, Message Received from fifochild using [FIFO]=%s&quot;</span>,nbytes,buffer);
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<a name="l00129"></a>00129                         (void)close(fifoFd);
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<a name="l00130"></a>00130                         }
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<a name="l00132"></a>00132                 childProcessStream = popen(popenExecFileName,<span class="stringliteral">&quot;r&quot;</span>);
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<a name="l00134"></a>00134                 <span class="keywordflow">if</span>(childProcessStream == NULL)
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<a name="l00135"></a>00135                         {
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<a name="l00136"></a>00136                         Error(<span class="stringliteral">&quot;\n Failure to create child process with popen()&quot;</span>);
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<a name="l00137"></a>00137                         PressKey();
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<a name="l00138"></a>00138                         <span class="keywordflow">return</span> EXIT_FAILURE;
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<a name="l00139"></a>00139                         }
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<a name="l00140"></a>00140                 <span class="keywordflow">else</span>
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<a name="l00141"></a>00141                         {
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<a name="l00143"></a>00143                         <span class="keywordtype">char</span> buffer[100];
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<a name="l00145"></a>00145                         <span class="keywordtype">int</span> nbytes;
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<a name="l00147"></a>00147                         childProcessFD = fileno(childProcessStream);
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<a name="l00148"></a>00148                         memset(buffer,0,<span class="keyword">sizeof</span>(buffer));
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<a name="l00149"></a>00149                         printf(<span class="stringliteral">&quot;\n\nWaiting for message from Child[popen()]\n&quot;</span>);
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<a name="l00151"></a>00151                         nbytes = read(childProcessFD,buffer,<span class="keyword">sizeof</span>(buffer));
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<a name="l00152"></a>00152                         printf(<span class="stringliteral">&quot;Bytes Received=%d, Message Received from ipcchild using[popen()]=%s\n[ok]\n&quot;</span>,nbytes,buffer);
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<a name="l00154"></a>00154                         pclose(childProcessStream);
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<a name="l00155"></a>00155                         }
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<a name="l00157"></a>00157                 (void)waitpid(fifoChildPid,NULL,0);
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<a name="l00159"></a>00159                 unlinkResult=unlink(fifoFileName);
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<a name="l00160"></a>00160                 <span class="keywordflow">if</span>(unlinkResult!=0)
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<a name="l00161"></a>00161                         {
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<a name="l00162"></a>00162                         Error(<span class="stringliteral">&quot;Unlink error&quot;</span>);
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<a name="l00163"></a>00163                         }
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<a name="l00164"></a>00164                 }
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<a name="l00165"></a>00165         printf(<span class="stringliteral">&quot;Press any key to exit...&quot;</span>);
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<a name="l00166"></a>00166         PressKey();
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<a name="l00167"></a>00167         <span class="keywordflow">return</span> EXIT_SUCCESS;
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<a name="l00168"></a>00168         }
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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>
MCL/sftools/depl/docscontent