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<h1>daemon_unix.cc</h1><a href="a00087.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Package : omniEvents</span>
<a name="l00002"></a>00002 <span class="comment">// daemon_unix.h Created : 2004/06/29</span>
<a name="l00003"></a>00003 <span class="comment">// Author : Alex Tingle</span>
<a name="l00004"></a>00004 <span class="comment">//</span>
<a name="l00005"></a>00005 <span class="comment">// Copyright (C) 2004 Alex Tingle.</span>
<a name="l00006"></a>00006 <span class="comment">//</span>
<a name="l00007"></a>00007 <span class="comment">// This file is part of the omniEvents application.</span>
<a name="l00008"></a>00008 <span class="comment">//</span>
<a name="l00009"></a>00009 <span class="comment">// omniEvents is free software; you can redistribute it and/or</span>
<a name="l00010"></a>00010 <span class="comment">// modify it under the terms of the GNU Lesser General Public</span>
<a name="l00011"></a>00011 <span class="comment">// License as published by the Free Software Foundation; either</span>
<a name="l00012"></a>00012 <span class="comment">// version 2.1 of the License, or (at your option) any later version.</span>
<a name="l00013"></a>00013 <span class="comment">//</span>
<a name="l00014"></a>00014 <span class="comment">// omniEvents is distributed in the hope that it will be useful,</span>
<a name="l00015"></a>00015 <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00016"></a>00016 <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00017"></a>00017 <span class="comment">// Lesser General Public License for more details.</span>
<a name="l00018"></a>00018 <span class="comment">//</span>
<a name="l00019"></a>00019 <span class="comment">// You should have received a copy of the GNU Lesser General Public</span>
<a name="l00020"></a>00020 <span class="comment">// License along with this library; if not, write to the Free Software</span>
<a name="l00021"></a>00021 <span class="comment">// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span>
<a name="l00022"></a>00022 <span class="comment">//</span>
<a name="l00023"></a>00023
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="a00086.html">daemon.h</a>"</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include "<a class="code" href="a00107.html">main.h</a>"</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include "<a class="code" href="a00088.html">daemon_unix.h</a>"</span>
<a name="l00027"></a>00027
<a name="l00028"></a><a class="code" href="a00087.html#a0">00028</a> <span class="preprocessor">#define NEED_PACKAGE_INFO</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span><span class="preprocessor">#ifdef HAVE_CONFIG_H</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span><span class="preprocessor"># include "<a class="code" href="a00083.html">config.h</a>"</span>
<a name="l00031"></a>00031 <span class="preprocessor">#endif</span>
<a name="l00032"></a>00032 <span class="preprocessor"></span>
<a name="l00033"></a>00033 <span class="preprocessor">#ifdef HAVE_IOSTREAM</span>
<a name="l00034"></a>00034 <span class="preprocessor"></span><span class="preprocessor"># include <iostream></span>
<a name="l00035"></a>00035 <span class="preprocessor"># include <fstream></span>
<a name="l00036"></a>00036 <span class="preprocessor">#else</span>
<a name="l00037"></a>00037 <span class="preprocessor"></span><span class="preprocessor"># include <iostream.h></span>
<a name="l00038"></a>00038 <span class="preprocessor"># include <fstream.h></span>
<a name="l00039"></a>00039 <span class="preprocessor">#endif</span>
<a name="l00040"></a>00040 <span class="preprocessor"></span>
<a name="l00041"></a>00041 <span class="preprocessor">#ifdef HAVE_STD_IOSTREAM</span>
<a name="l00042"></a>00042 <span class="preprocessor"></span><span class="keyword">using</span> <span class="keyword">namespace </span>std;
<a name="l00043"></a>00043 <span class="preprocessor">#endif</span>
<a name="l00044"></a>00044 <span class="preprocessor"></span>
<a name="l00045"></a>00045 <span class="preprocessor">#include <stdlib.h></span> <span class="comment">// exit, on_exit</span>
<a name="l00046"></a>00046 <span class="preprocessor">#include <errno.h></span> <span class="comment">// errno</span>
<a name="l00047"></a>00047
<a name="l00048"></a>00048 <span class="preprocessor">#ifdef HAVE_UNISTD_H</span>
<a name="l00049"></a>00049 <span class="preprocessor"></span><span class="preprocessor"># include <unistd.h></span> <span class="comment">// fork, umask, setsid, dup2, chdir, close</span>
<a name="l00050"></a>00050 <span class="preprocessor">#endif</span>
<a name="l00051"></a>00051 <span class="preprocessor"></span>
<a name="l00052"></a>00052 <span class="preprocessor">#ifdef HAVE_SYS_TYPES_H</span>
<a name="l00053"></a>00053 <span class="preprocessor"></span><span class="preprocessor"># include <sys/types.h></span> <span class="comment">// fork, umask, open</span>
<a name="l00054"></a>00054 <span class="preprocessor">#endif</span>
<a name="l00055"></a>00055 <span class="preprocessor"></span>
<a name="l00056"></a>00056 <span class="preprocessor">#ifdef HAVE_SYS_STAT_H</span>
<a name="l00057"></a>00057 <span class="preprocessor"></span><span class="preprocessor"># include <sys/stat.h></span> <span class="comment">//open</span>
<a name="l00058"></a>00058 <span class="preprocessor">#endif</span>
<a name="l00059"></a>00059 <span class="preprocessor"></span>
<a name="l00060"></a>00060 <span class="preprocessor">#ifdef HAVE_FCNTL_H</span>
<a name="l00061"></a>00061 <span class="preprocessor"></span><span class="preprocessor"># include <fcntl.h></span> <span class="comment">// open</span>
<a name="l00062"></a>00062 <span class="preprocessor">#endif</span>
<a name="l00063"></a>00063 <span class="preprocessor"></span>
<a name="l00064"></a>00064 <span class="preprocessor">#ifdef HAVE_SYSLOG_H</span>
<a name="l00065"></a>00065 <span class="preprocessor"></span><span class="preprocessor"># include <syslog.h></span> <span class="comment">// openlog, syslog</span>
<a name="l00066"></a>00066 <span class="preprocessor">#endif</span>
<a name="l00067"></a>00067 <span class="preprocessor"></span>
<a name="l00068"></a>00068 <span class="preprocessor">#ifdef HAVE_STRING_H</span>
<a name="l00069"></a>00069 <span class="preprocessor"></span><span class="preprocessor"># include <string.h></span> <span class="comment">// strerror</span>
<a name="l00070"></a>00070 <span class="preprocessor">#endif</span>
<a name="l00071"></a>00071 <span class="preprocessor"></span>
<a name="l00072"></a>00072 <span class="preprocessor">#ifdef HAVE_SIGNAL_H</span>
<a name="l00073"></a>00073 <span class="preprocessor"></span><span class="preprocessor">#include <signal.h></span> <span class="comment">// kill</span>
<a name="l00074"></a>00074 <span class="preprocessor">#endif</span>
<a name="l00075"></a>00075 <span class="preprocessor"></span>
<a name="l00076"></a>00076 <span class="preprocessor">#include <string></span>
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="comment">// Forward declaration of omniORB::setLogFunction()</span>
<a name="l00079"></a><a class="code" href="a00142.html">00079</a> <span class="keyword">namespace </span>omniORB {
<a name="l00080"></a>00080 <span class="keywordtype">void</span> <a class="code" href="a00142.html#a0">setLogFunction</a>(<span class="keywordtype">void</span> (*logFunction)(<span class="keyword">const</span> <span class="keywordtype">char</span>*));
<a name="l00081"></a>00081 }
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <span class="keyword">namespace </span>OmniEvents {
<a name="l00084"></a>00084
<a name="l00085"></a><a class="code" href="a00087.html#a1">00085</a> <span class="preprocessor">#define STRERR_FILE_LINE strerror(errno)<<" "<<__FILE__<<":"<<__LINE__</span>
<a name="l00086"></a>00086 <span class="preprocessor"></span>
<a name="l00087"></a><a class="code" href="a00087.html#a2">00087</a> <span class="preprocessor">#define PIPE_READ 0</span>
<a name="l00088"></a><a class="code" href="a00087.html#a3">00088</a> <span class="preprocessor"></span><span class="preprocessor">#define PIPE_WRITE 1</span>
<a name="l00089"></a>00089 <span class="preprocessor"></span>
<a name="l00090"></a>00090
<a name="l00094"></a><a class="code" href="a00141.html#a0">00094</a> <a class="code" href="a00045.html">DaemonImpl</a> <a class="code" href="a00141.html#a0">daemon</a>;
<a name="l00095"></a>00095
<a name="l00096"></a><a class="code" href="a00044.html#a0">00096</a> <a class="code" href="a00044.html#d0">Daemon::Daemon</a>(<span class="keywordtype">int</span>&,<span class="keywordtype">char</span>**&)
<a name="l00097"></a>00097 {
<a name="l00098"></a>00098 <span class="comment">// Initialise the DaemonImpl singleton.</span>
<a name="l00099"></a>00099 <a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#o0">_tracefile</a>=NULL;
<a name="l00100"></a>00100 <a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#o1">_foreground</a>=<span class="keyword">false</span>;
<a name="l00101"></a>00101 <a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#o2">_pidfile</a>=NULL;
<a name="l00102"></a>00102 <a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#o3">_pipe</a>[0]=<a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#o3">_pipe</a>[1]=-1;
<a name="l00103"></a>00103 <a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#o4">_havePidfile</a>=<span class="keyword">false</span>;
<a name="l00104"></a>00104 <a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#o5">_haveParent</a>=<span class="keyword">false</span>;
<a name="l00105"></a>00105 <a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#o6">_haveSyslog</a>=<span class="keyword">false</span>;
<a name="l00106"></a>00106 }
<a name="l00107"></a><a class="code" href="a00044.html#a2">00107</a> <span class="keywordtype">void</span> <a class="code" href="a00044.html#a2">Daemon::tracefile</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* val) { <a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#a2">tracefile</a>(val); }
<a name="l00108"></a><a class="code" href="a00044.html#a3">00108</a> <span class="keywordtype">void</span> <a class="code" href="a00044.html#a3">Daemon::pidfile</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* val) { <a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#a3">pidfile</a>(val); }
<a name="l00109"></a><a class="code" href="a00044.html#a4">00109</a> <span class="keywordtype">void</span> <a class="code" href="a00044.html#a4">Daemon::foreground</a>(<span class="keywordtype">bool</span> val) { <a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#a4">foreground</a>(val); }
<a name="l00110"></a><a class="code" href="a00044.html#a5">00110</a> <span class="keywordtype">void</span> <a class="code" href="a00044.html#a5">Daemon::daemonize</a>() { <a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#a6">daemonize</a>(); }
<a name="l00111"></a><a class="code" href="a00044.html#a6">00111</a> <span class="keywordtype">void</span> <a class="code" href="a00044.html#a6">Daemon::runningOk</a>() { <a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#a7">runningOk</a>(); }
<a name="l00112"></a><a class="code" href="a00044.html#a1">00112</a> <a class="code" href="a00044.html#a1">Daemon::~Daemon</a>() { <a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#a8">shutdown</a>(0); }
<a name="l00113"></a>00113
<a name="l00114"></a><a class="code" href="a00141.html#a3">00114</a> <span class="keywordtype">void</span> <a class="code" href="a00141.html#a3">shutdown0</a>(<span class="keywordtype">void</span>) { <a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#a8">shutdown</a>(0); }
<a name="l00115"></a><a class="code" href="a00141.html#a4">00115</a> <span class="keywordtype">void</span> <a class="code" href="a00141.html#a4">shutdown2</a>(<span class="keywordtype">int</span> s,<span class="keywordtype">void</span>*){ <a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#a8">shutdown</a>(s); }
<a name="l00116"></a>00116
<a name="l00118"></a>00118
<a name="l00119"></a><a class="code" href="a00045.html#a0">00119</a> <a class="code" href="a00045.html#a0">DaemonImpl::DaemonImpl</a>(){}
<a name="l00120"></a>00120
<a name="l00121"></a>00121
<a name="l00122"></a><a class="code" href="a00045.html#a1">00122</a> <a class="code" href="a00045.html#a1">DaemonImpl::~DaemonImpl</a>()
<a name="l00123"></a>00123 {
<a name="l00124"></a>00124 <span class="keyword">delete</span>[] <a class="code" href="a00045.html#o2">_pidfile</a>;
<a name="l00125"></a>00125 <span class="keyword">delete</span>[] <a class="code" href="a00045.html#o0">_tracefile</a>;
<a name="l00126"></a>00126 <a class="code" href="a00045.html#o2">_pidfile</a>=NULL;
<a name="l00127"></a>00127 <a class="code" href="a00045.html#o0">_tracefile</a>=NULL;
<a name="l00128"></a>00128 }
<a name="l00129"></a>00129
<a name="l00130"></a>00130
<a name="l00131"></a><a class="code" href="a00045.html#a2">00131</a> <span class="keywordtype">void</span> <a class="code" href="a00045.html#a2">DaemonImpl::tracefile</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* val)
<a name="l00132"></a>00132 {
<a name="l00133"></a>00133 <a class="code" href="a00045.html#o0">_tracefile</a>=::strdup(val);
<a name="l00134"></a>00134 }
<a name="l00135"></a>00135
<a name="l00136"></a>00136
<a name="l00137"></a><a class="code" href="a00045.html#a4">00137</a> <span class="keywordtype">void</span> <a class="code" href="a00045.html#a4">DaemonImpl::foreground</a>(<span class="keywordtype">bool</span> val)
<a name="l00138"></a>00138 {
<a name="l00139"></a>00139 <a class="code" href="a00045.html#o1">_foreground</a>=val;
<a name="l00140"></a>00140 }
<a name="l00141"></a>00141
<a name="l00142"></a>00142
<a name="l00143"></a><a class="code" href="a00045.html#a3">00143</a> <span class="keywordtype">void</span> <a class="code" href="a00045.html#a3">DaemonImpl::pidfile</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* val)
<a name="l00144"></a>00144 {
<a name="l00145"></a>00145 string pidfileStr =val;
<a name="l00146"></a>00146 <span class="keywordflow">if</span>(pidfileStr[0]!=<span class="charliteral">'/'</span>)
<a name="l00147"></a>00147 pidfileStr=string(<span class="stringliteral">"/var/run/"</span>)+pidfileStr;
<a name="l00148"></a>00148 <a class="code" href="a00045.html#o2">DaemonImpl::_pidfile</a>=::strdup(pidfileStr.c_str());
<a name="l00149"></a>00149 }
<a name="l00150"></a>00150
<a name="l00151"></a>00151
<a name="l00152"></a><a class="code" href="a00045.html#a5">00152</a> <span class="keywordtype">void</span> <a class="code" href="a00045.html#a5">DaemonImpl::initialize</a>(<span class="keywordtype">int</span>&,<span class="keywordtype">char</span>**&)
<a name="l00153"></a>00153 {
<a name="l00154"></a>00154 <span class="comment">// Does nothing on Unix</span>
<a name="l00155"></a>00155 }
<a name="l00156"></a>00156
<a name="l00157"></a>00157
<a name="l00158"></a><a class="code" href="a00045.html#a6">00158</a> <span class="keywordtype">void</span> <a class="code" href="a00045.html#a6">DaemonImpl::daemonize</a>()
<a name="l00159"></a>00159 {
<a name="l00160"></a>00160 <span class="comment">// Register the shutdown function.</span>
<a name="l00161"></a>00161 <span class="preprocessor">#ifdef HAVE_ON_EXIT</span>
<a name="l00162"></a>00162 <span class="preprocessor"></span> <span class="keywordflow">if</span>( ::on_exit(<a class="code" href="a00141.html#a4">shutdown2</a>,NULL) <0)
<a name="l00163"></a>00163 <span class="preprocessor">#else</span>
<a name="l00164"></a>00164 <span class="preprocessor"></span> <span class="keywordflow">if</span>( ::atexit(<a class="code" href="a00141.html#a3">shutdown0</a>) <0)
<a name="l00165"></a>00165 <span class="preprocessor">#endif</span>
<a name="l00166"></a>00166 <span class="preprocessor"></span> {
<a name="l00167"></a>00167 cerr<<<span class="stringliteral">"Failed to set exit handler."</span><<endl;
<a name="l00168"></a>00168 ::exit(-1);
<a name="l00169"></a>00169 }
<a name="l00170"></a>00170
<a name="l00171"></a>00171 <span class="keywordflow">if</span>(!<a class="code" href="a00045.html#o1">_foreground</a>)
<a name="l00172"></a>00172 {
<a name="l00173"></a>00173 this-><a class="code" href="a00045.html#d0">fork</a>();
<a name="l00174"></a>00174 <span class="comment">// ...now in the CHILD.</span>
<a name="l00175"></a>00175 }
<a name="l00176"></a>00176
<a name="l00177"></a>00177 <span class="comment">// Check & write the pidfile (if _pidfile is set).</span>
<a name="l00178"></a>00178 <a class="code" href="a00045.html#d3">checkPidfileOrShutdown</a>();
<a name="l00179"></a>00179 <a class="code" href="a00045.html#d4">writePidfile</a>();
<a name="l00180"></a>00180
<a name="l00181"></a>00181 <span class="comment">// Change the file mode mask</span>
<a name="l00182"></a>00182 ::umask(0);
<a name="l00183"></a>00183
<a name="l00184"></a>00184 <span class="comment">// Change the current working directory</span>
<a name="l00185"></a>00185 <span class="keywordflow">if</span>(::chdir(<span class="stringliteral">"/"</span>)!=0)
<a name="l00186"></a>00186 {
<a name="l00187"></a>00187 cerr<<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00188"></a>00188 ::exit(-1);
<a name="l00189"></a>00189 }
<a name="l00190"></a>00190
<a name="l00191"></a>00191 <span class="comment">// If _tracefile is not set, then use syslog.</span>
<a name="l00192"></a>00192 <span class="keywordflow">if</span>(<a class="code" href="a00045.html#o0">_tracefile</a> && <a class="code" href="a00045.html#o0">_tracefile</a>[0]!=<span class="charliteral">'\0'</span>)
<a name="l00193"></a>00193 {
<a name="l00194"></a>00194 <a class="code" href="a00045.html#d1">redirectStreamsTo</a>(<a class="code" href="a00045.html#o0">_tracefile</a>);
<a name="l00195"></a>00195 }
<a name="l00196"></a>00196 <span class="keywordflow">else</span>
<a name="l00197"></a>00197 {
<a name="l00198"></a>00198 <span class="preprocessor">#ifndef HAVE_OMNIORB3</span>
<a name="l00199"></a>00199 <span class="preprocessor"></span><span class="preprocessor"># ifdef LOG_PERROR</span>
<a name="l00200"></a>00200 <span class="preprocessor"></span> ::openlog(<a class="code" href="a00083.html#a38">PACKAGE_NAME</a> <span class="stringliteral">": "</span>,LOG_PID|LOG_PERROR,LOG_DAEMON);
<a name="l00201"></a>00201 <span class="preprocessor"># else</span>
<a name="l00202"></a>00202 <span class="preprocessor"></span> ::openlog(PACKAGE_NAME <span class="stringliteral">": "</span>,LOG_PID,LOG_DAEMON);
<a name="l00203"></a>00203 <span class="preprocessor"># endif</span>
<a name="l00204"></a>00204 <span class="preprocessor"></span> <a class="code" href="a00045.html#o6">_haveSyslog</a>=<span class="keyword">true</span>;
<a name="l00205"></a>00205 <a class="code" href="a00142.html#a0">omniORB::setLogFunction</a>(<a class="code" href="a00045.html#e0">DaemonImpl::log</a>);
<a name="l00206"></a>00206 <span class="preprocessor">#else</span>
<a name="l00207"></a>00207 <span class="preprocessor"></span> cerr<<<span class="stringliteral">"You must use option -t to set the file for trace messages."</span>
<a name="l00208"></a>00208 <span class="stringliteral">"\n(This is because omniORB3 cannot redirect messages to syslog.)"</span><<endl;
<a name="l00209"></a>00209 ::exit(-1);
<a name="l00210"></a>00210 <span class="preprocessor">#endif</span>
<a name="l00211"></a>00211 <span class="preprocessor"></span> }
<a name="l00212"></a>00212 } <span class="comment">// end daemonize()</span>
<a name="l00213"></a>00213
<a name="l00214"></a>00214
<a name="l00215"></a><a class="code" href="a00045.html#a7">00215</a> <span class="keywordtype">void</span> <a class="code" href="a00045.html#a7">DaemonImpl::runningOk</a>()
<a name="l00216"></a>00216 {
<a name="l00217"></a>00217 <span class="keywordflow">if</span>(<a class="code" href="a00045.html#o5">_haveParent</a>)
<a name="l00218"></a>00218 {
<a name="l00219"></a>00219 <a class="code" href="a00045.html#o5">_haveParent</a>=<span class="keyword">false</span>;
<a name="l00220"></a>00220 <a class="code" href="a00045.html#d6">notifyParent</a>(0);
<a name="l00221"></a>00221 }
<a name="l00222"></a>00222
<a name="l00223"></a>00223 <span class="comment">// No longer send syslog messages to stderr.</span>
<a name="l00224"></a>00224 <span class="keywordflow">if</span>(<a class="code" href="a00045.html#o6">_haveSyslog</a>)
<a name="l00225"></a>00225 {
<a name="l00226"></a>00226 <span class="preprocessor">#ifdef LOG_PERROR</span>
<a name="l00227"></a>00227 <span class="preprocessor"></span> ::closelog();
<a name="l00228"></a>00228 <span class="comment">// FIXME: Possible race here? If a log message is sent right now.</span>
<a name="l00229"></a>00229 ::openlog(<a class="code" href="a00083.html#a38">PACKAGE_NAME</a> <span class="stringliteral">": "</span>,LOG_PID,LOG_DAEMON);
<a name="l00230"></a>00230 <span class="preprocessor">#endif</span>
<a name="l00231"></a>00231 <span class="preprocessor"></span> <a class="code" href="a00045.html#d1">redirectStreamsTo</a>(<span class="stringliteral">"/dev/null"</span>);
<a name="l00232"></a>00232 }
<a name="l00233"></a>00233 }
<a name="l00234"></a>00234
<a name="l00235"></a>00235
<a name="l00236"></a><a class="code" href="a00045.html#a8">00236</a> <span class="keywordtype">void</span> <a class="code" href="a00045.html#a8">DaemonImpl::shutdown</a>(<span class="keywordtype">int</span> status)
<a name="l00237"></a>00237 {
<a name="l00238"></a>00238 <span class="comment">// Remove the pidfile.</span>
<a name="l00239"></a>00239 <span class="keywordflow">if</span>(<a class="code" href="a00045.html#o4">_havePidfile</a> && <a class="code" href="a00045.html#o2">_pidfile</a> && 0!=::unlink(<a class="code" href="a00045.html#o2">_pidfile</a>))
<a name="l00240"></a>00240 {
<a name="l00241"></a>00241 cerr<<<span class="stringliteral">"Failed to remove pidfile '"</span><<<a class="code" href="a00045.html#o2">_pidfile</a><<<span class="stringliteral">"': "</span>
<a name="l00242"></a>00242 <<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00243"></a>00243 status=-1;
<a name="l00244"></a>00244 }
<a name="l00245"></a>00245 <a class="code" href="a00045.html#o4">_havePidfile</a>=<span class="keyword">false</span>;
<a name="l00246"></a>00246
<a name="l00247"></a>00247 <span class="comment">// Close syslog.</span>
<a name="l00248"></a>00248 <span class="keywordflow">if</span>(<a class="code" href="a00045.html#o6">_haveSyslog</a>)
<a name="l00249"></a>00249 {
<a name="l00250"></a>00250 <a class="code" href="a00045.html#o6">_haveSyslog</a>=<span class="keyword">false</span>;
<a name="l00251"></a>00251 ::closelog();
<a name="l00252"></a>00252 }
<a name="l00253"></a>00253
<a name="l00254"></a>00254 <span class="comment">// Notify the parent.</span>
<a name="l00255"></a>00255 <span class="keywordflow">if</span>(<a class="code" href="a00045.html#o5">_haveParent</a>)
<a name="l00256"></a>00256 {
<a name="l00257"></a>00257 <a class="code" href="a00045.html#o5">_haveParent</a>=<span class="keyword">false</span>;
<a name="l00258"></a>00258 <a class="code" href="a00045.html#d6">notifyParent</a>(status);
<a name="l00259"></a>00259 }
<a name="l00260"></a>00260
<a name="l00261"></a>00261 <span class="comment">// outtahere...</span>
<a name="l00262"></a>00262 }
<a name="l00263"></a>00263
<a name="l00264"></a>00264
<a name="l00265"></a><a class="code" href="a00045.html#e0">00265</a> <span class="keywordtype">void</span> <a class="code" href="a00045.html#e0">DaemonImpl::log</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* message)
<a name="l00266"></a>00266 {
<a name="l00267"></a>00267 <span class="keywordtype">int</span> priority =LOG_INFO;
<a name="l00268"></a>00268 <span class="comment">// Cut off the redundant package name prefix.</span>
<a name="l00269"></a>00269 <span class="comment">// "omniEvents: " --> stripped off</span>
<a name="l00270"></a>00270 <span class="comment">// "omniEvents! " --> stripped off and sets priority to LOG_ERR</span>
<a name="l00271"></a>00271 <span class="keyword">const</span> <span class="keywordtype">char</span>* mPos( message );
<a name="l00272"></a>00272 <span class="keyword">const</span> <span class="keywordtype">char</span>* pPos( <span class="stringliteral">"omniEvents: "</span> );
<a name="l00273"></a>00273 <span class="keywordflow">while</span>(*mPos && (*mPos==*pPos || *pPos==<span class="charliteral">':'</span>))
<a name="l00274"></a>00274 {
<a name="l00275"></a>00275 ++mPos;
<a name="l00276"></a>00276 ++pPos;
<a name="l00277"></a>00277 <span class="keywordflow">if</span>(!*pPos)
<a name="l00278"></a>00278 {
<a name="l00279"></a>00279 <span class="keywordflow">switch</span>(message[10])
<a name="l00280"></a>00280 {
<a name="l00281"></a>00281 <span class="keywordflow">case</span> <span class="charliteral">'!'</span>: priority=LOG_ERR; <span class="comment">// ...AND DROPS THROUGH...</span>
<a name="l00282"></a>00282 <span class="keywordflow">case</span> <span class="charliteral">':'</span>: message=mPos;
<a name="l00283"></a>00283 }
<a name="l00284"></a>00284 <span class="keywordflow">break</span>; <span class="comment">// loop exit</span>
<a name="l00285"></a>00285 }
<a name="l00286"></a>00286 }
<a name="l00287"></a>00287 <span class="comment">// Send the message.</span>
<a name="l00288"></a>00288 ::syslog(priority,message);
<a name="l00289"></a>00289 <span class="preprocessor">#ifndef LOG_PERROR</span>
<a name="l00290"></a>00290 <span class="preprocessor"></span> <span class="comment">// If we don't have LOG_PERROR, then we'll have to manually send</span>
<a name="l00291"></a>00291 <span class="comment">// log messages to stderr.</span>
<a name="l00292"></a>00292 <span class="keywordflow">if</span>(<a class="code" href="a00141.html#a0">daemon</a>.<a class="code" href="a00045.html#o5">_haveParent</a>)
<a name="l00293"></a>00293 cerr<<message<<flush;
<a name="l00294"></a>00294 <span class="preprocessor">#endif</span>
<a name="l00295"></a>00295 <span class="preprocessor"></span>}
<a name="l00296"></a>00296
<a name="l00297"></a>00297
<a name="l00298"></a><a class="code" href="a00045.html#d3">00298</a> <span class="keywordtype">void</span> <a class="code" href="a00045.html#d3">DaemonImpl::checkPidfileOrShutdown</a>()
<a name="l00299"></a>00299 {
<a name="l00300"></a>00300 <span class="keywordflow">if</span>(!<a class="code" href="a00045.html#o2">_pidfile</a>)
<a name="l00301"></a>00301 <span class="keywordflow">return</span>;
<a name="l00302"></a>00302
<a name="l00303"></a>00303 <span class="comment">// Try to read pidfile.</span>
<a name="l00304"></a>00304 pid_t pidFromFile =0;
<a name="l00305"></a>00305 <span class="keyword">struct </span>stat buf;
<a name="l00306"></a>00306 <span class="keywordflow">if</span>(0==::stat(<a class="code" href="a00045.html#o2">_pidfile</a>,&buf))
<a name="l00307"></a>00307 {
<a name="l00308"></a>00308 <span class="keywordflow">if</span>(!S_ISREG(buf.st_mode))
<a name="l00309"></a>00309 {
<a name="l00310"></a>00310 cerr<<<span class="stringliteral">"Pidfile '"</span><<_pidfile<<<span class="stringliteral">"' is not a regular file."</span><<endl;
<a name="l00311"></a>00311 ::exit(-1);
<a name="l00312"></a>00312 }
<a name="l00313"></a>00313 <span class="keywordflow">try</span>
<a name="l00314"></a>00314 {
<a name="l00315"></a>00315 ifstream infile(_pidfile);
<a name="l00316"></a>00316 infile>>pidFromFile;
<a name="l00317"></a>00317 infile.close();
<a name="l00318"></a>00318 }
<a name="l00319"></a>00319 <span class="keywordflow">catch</span>(...)
<a name="l00320"></a>00320 {
<a name="l00321"></a>00321 cerr<<<span class="stringliteral">"Failed to read pidfile'"</span><<_pidfile<<<span class="stringliteral">"'."</span><<endl;
<a name="l00322"></a>00322 ::exit(-1);
<a name="l00323"></a>00323 }
<a name="l00324"></a>00324 }
<a name="l00325"></a>00325 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(errno!=ENOENT)
<a name="l00326"></a>00326 {
<a name="l00327"></a>00327 cerr<<<span class="stringliteral">"Failed to stat pidfile '"</span><<_pidfile<<<span class="stringliteral">"': "</span>
<a name="l00328"></a>00328 <<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00329"></a>00329 ::exit(-1);
<a name="l00330"></a>00330 }
<a name="l00331"></a>00331
<a name="l00332"></a>00332 <span class="comment">// If process 'pidFromFile' is running then exit, else remove pidfile.</span>
<a name="l00333"></a>00333 <span class="keywordflow">if</span>(pidFromFile>0)
<a name="l00334"></a>00334 {
<a name="l00335"></a>00335 <span class="keywordflow">if</span>(0==::kill(pidFromFile,0)) <span class="comment">// tests for running 'pidFromFile'.</span>
<a name="l00336"></a>00336 {
<a name="l00337"></a>00337 cerr<<<span class="stringliteral">"Quitting because process "</span><<pidFromFile
<a name="l00338"></a>00338 <<<span class="stringliteral">" defined in pidfile '"</span><<_pidfile<<<span class="stringliteral">"'"</span>
<a name="l00339"></a>00339 <<<span class="stringliteral">" is already running."</span><<endl;
<a name="l00340"></a>00340 ::exit(-1);
<a name="l00341"></a>00341 }
<a name="l00342"></a>00342 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(errno!=ESRCH)
<a name="l00343"></a>00343 {
<a name="l00344"></a>00344 cerr<<<span class="stringliteral">"Failed to test for process "</span><<pidFromFile
<a name="l00345"></a>00345 <<<span class="stringliteral">" defined in pidfile '"</span><<_pidfile<<<span class="stringliteral">"': "</span>
<a name="l00346"></a>00346 <<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00347"></a>00347 ::exit(-1);
<a name="l00348"></a>00348 }
<a name="l00349"></a>00349 }
<a name="l00350"></a>00350 }
<a name="l00351"></a>00351
<a name="l00352"></a>00352
<a name="l00353"></a><a class="code" href="a00045.html#d4">00353</a> <span class="keywordtype">void</span> <a class="code" href="a00045.html#d4">DaemonImpl::writePidfile</a>()
<a name="l00354"></a>00354 {
<a name="l00355"></a>00355 <span class="keywordflow">if</span>(<a class="code" href="a00045.html#o2">_pidfile</a>)
<a name="l00356"></a>00356 {
<a name="l00357"></a>00357 <span class="keywordflow">try</span>
<a name="l00358"></a>00358 {
<a name="l00359"></a>00359 <span class="preprocessor">#ifdef FSTREAM_OPEN_PROT</span>
<a name="l00360"></a>00360 <span class="preprocessor"></span> ofstream outfile(<a class="code" href="a00045.html#o2">_pidfile</a>,ios::out|ios::trunc,0644);
<a name="l00361"></a>00361 <span class="preprocessor">#else</span>
<a name="l00362"></a>00362 <span class="preprocessor"></span> ofstream outfile(<a class="code" href="a00045.html#o2">_pidfile</a>,ios::out|ios::trunc);
<a name="l00363"></a>00363 <span class="preprocessor">#endif</span>
<a name="l00364"></a>00364 <span class="preprocessor"></span> outfile<<::getpid()<<endl;
<a name="l00365"></a>00365 outfile.close();
<a name="l00366"></a>00366 <span class="comment">// Tell shutdown() that the pidfile needs to be cleared away.</span>
<a name="l00367"></a>00367 <a class="code" href="a00045.html#o4">_havePidfile</a>=<span class="keyword">true</span>;
<a name="l00368"></a>00368 }
<a name="l00369"></a>00369 <span class="keywordflow">catch</span>(...)
<a name="l00370"></a>00370 {
<a name="l00371"></a>00371 cerr<<<span class="stringliteral">"Failed to write pidfile '"</span><<<a class="code" href="a00045.html#o2">_pidfile</a><<<span class="stringliteral">"'."</span><<endl;
<a name="l00372"></a>00372 ::exit(-1);
<a name="l00373"></a>00373 }
<a name="l00374"></a>00374 }
<a name="l00375"></a>00375 }
<a name="l00376"></a>00376
<a name="l00377"></a>00377
<a name="l00378"></a><a class="code" href="a00045.html#d0">00378</a> <span class="keywordtype">void</span> <a class="code" href="a00045.html#d0">DaemonImpl::fork</a>()
<a name="l00379"></a>00379 {
<a name="l00380"></a>00380 <span class="keywordflow">if</span>( ::pipe(<a class="code" href="a00045.html#o3">_pipe</a>) <0)
<a name="l00381"></a>00381 {
<a name="l00382"></a>00382 cerr<<<span class="stringliteral">"Failed to open pipe: "</span><<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00383"></a>00383 ::exit(-1);
<a name="l00384"></a>00384 }
<a name="l00385"></a>00385
<a name="l00386"></a>00386 <span class="comment">// Fork off from the parent process</span>
<a name="l00387"></a>00387 pid_t pid =<a class="code" href="a00045.html#d0">::fork</a>();
<a name="l00388"></a>00388 <span class="keywordflow">if</span>(pid<0)
<a name="l00389"></a>00389 {
<a name="l00390"></a>00390 cerr<<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00391"></a>00391 ::exit(-1);
<a name="l00392"></a>00392 }
<a name="l00393"></a>00393 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(pid>0)
<a name="l00394"></a>00394 {
<a name="l00395"></a>00395 <span class="comment">//</span>
<a name="l00396"></a>00396 <span class="comment">// Now in the PARENT</span>
<a name="l00397"></a>00397 <span class="comment">//</span>
<a name="l00398"></a>00398
<a name="l00399"></a>00399 <span class="comment">// Close the write end of the pipe.</span>
<a name="l00400"></a>00400 <span class="keywordflow">if</span>( ::close(<a class="code" href="a00045.html#o3">_pipe</a>[<a class="code" href="a00087.html#a3">PIPE_WRITE</a>]) <0)
<a name="l00401"></a>00401 cerr<<<span class="stringliteral">"Failed to close pipe: "</span><<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00402"></a>00402
<a name="l00403"></a>00403 ::_exit(<a class="code" href="a00045.html#d5">waitForChild</a>()); <span class="comment">// Exit without flushing buffers</span>
<a name="l00404"></a>00404 }
<a name="l00405"></a>00405
<a name="l00406"></a>00406 <span class="comment">//</span>
<a name="l00407"></a>00407 <span class="comment">// ...now in the CHILD.</span>
<a name="l00408"></a>00408 <span class="comment">//</span>
<a name="l00409"></a>00409
<a name="l00410"></a>00410 <a class="code" href="a00045.html#o5">_haveParent</a>=<span class="keyword">true</span>;
<a name="l00411"></a>00411
<a name="l00412"></a>00412 <span class="comment">// Close the read end of the pipe</span>
<a name="l00413"></a>00413 <span class="keywordflow">if</span>( ::close(<a class="code" href="a00045.html#o3">_pipe</a>[<a class="code" href="a00087.html#a2">PIPE_READ</a>]) <0)
<a name="l00414"></a>00414 cerr<<<span class="stringliteral">"Failed to close pipe: "</span><<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00415"></a>00415
<a name="l00416"></a>00416 <span class="comment">// Create a new SID for the child process</span>
<a name="l00417"></a>00417 pid_t sid =::setsid();
<a name="l00418"></a>00418 <span class="keywordflow">if</span>(sid<0)
<a name="l00419"></a>00419 {
<a name="l00420"></a>00420 cerr<<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00421"></a>00421 ::exit(-1);
<a name="l00422"></a>00422 }
<a name="l00423"></a>00423 }
<a name="l00424"></a>00424
<a name="l00425"></a>00425
<a name="l00426"></a><a class="code" href="a00045.html#d1">00426</a> <span class="keywordtype">void</span> <a class="code" href="a00045.html#d1">DaemonImpl::redirectStreamsTo</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* filename)
<a name="l00427"></a>00427 {
<a name="l00428"></a>00428 <span class="keywordflow">if</span>(<a class="code" href="a00045.html#d2">openFileFor</a>(<a class="code" href="a00100.html#a0">STDIN_FILENO</a>,<span class="stringliteral">"/dev/null"</span>,O_RDONLY)<0)
<a name="l00429"></a>00429 {
<a name="l00430"></a>00430 cerr<<<span class="stringliteral">"Failed to open /dev/null for STDIN: "</span><<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00431"></a>00431 ::exit(-1);
<a name="l00432"></a>00432 }
<a name="l00433"></a>00433 <span class="keywordflow">if</span>(<a class="code" href="a00045.html#d2">openFileFor</a>(<a class="code" href="a00100.html#a1">STDOUT_FILENO</a>,filename,O_WRONLY|O_CREAT|O_APPEND)<0)
<a name="l00434"></a>00434 {
<a name="l00435"></a>00435 cerr<<<span class="stringliteral">"Failed to open "</span><<filename<<<span class="stringliteral">" for STDOUT: "</span><<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00436"></a>00436 ::exit(-1);
<a name="l00437"></a>00437 }
<a name="l00438"></a>00438 <span class="keywordflow">if</span>(<a class="code" href="a00045.html#d2">openFileFor</a>(STDERR_FILENO,filename,O_WRONLY|O_CREAT|O_APPEND)<0)
<a name="l00439"></a>00439 {
<a name="l00440"></a>00440 cerr<<<span class="stringliteral">"Failed to open "</span><<filename<<<span class="stringliteral">" for STDERR: "</span><<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00441"></a>00441 ::exit(-1);
<a name="l00442"></a>00442 }
<a name="l00443"></a>00443 }
<a name="l00444"></a>00444
<a name="l00445"></a>00445
<a name="l00446"></a><a class="code" href="a00045.html#d2">00446</a> <span class="keywordtype">int</span> <a class="code" href="a00045.html#d2">DaemonImpl::openFileFor</a>(<span class="keywordtype">int</span> fd, <span class="keyword">const</span> <span class="keywordtype">char</span>* filename, <span class="keywordtype">int</span> flags)
<a name="l00447"></a>00447 {
<a name="l00448"></a>00448 <span class="keywordtype">int</span> newfd =::open(filename,flags,0644);
<a name="l00449"></a>00449 <span class="keywordflow">if</span>(newfd<0)
<a name="l00450"></a>00450 <span class="keywordflow">return</span> -1;
<a name="l00451"></a>00451 <span class="keywordflow">if</span>(newfd==fd)
<a name="l00452"></a>00452 <span class="keywordflow">return</span> fd;
<a name="l00453"></a>00453 <span class="keywordflow">if</span>(::dup2(newfd,fd)<0) <span class="comment">// replace fd with a copy of newfd</span>
<a name="l00454"></a>00454 <span class="keywordflow">return</span> -1;
<a name="l00455"></a>00455 ::close(newfd);
<a name="l00456"></a>00456 <span class="keywordflow">return</span> fd;
<a name="l00457"></a>00457 }
<a name="l00458"></a>00458
<a name="l00459"></a>00459
<a name="l00460"></a><a class="code" href="a00045.html#d5">00460</a> <span class="keywordtype">int</span> <a class="code" href="a00045.html#d5">DaemonImpl::waitForChild</a>()
<a name="l00461"></a>00461 {
<a name="l00462"></a>00462 <span class="keywordtype">int</span> status =-1;
<a name="l00463"></a>00463 ssize_t bytes =::read(<a class="code" href="a00045.html#o3">_pipe</a>[<a class="code" href="a00087.html#a2">PIPE_READ</a>],&status,<span class="keyword">sizeof</span>(status));
<a name="l00464"></a>00464 <span class="keywordflow">if</span>(bytes<<span class="keyword">sizeof</span>(status))
<a name="l00465"></a>00465 {
<a name="l00466"></a>00466 status=-1;
<a name="l00467"></a>00467 <span class="keywordflow">if</span>(bytes<0)
<a name="l00468"></a>00468 cerr<<<span class="stringliteral">"Parent failed to read result from pipe: "</span><<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00469"></a>00469 }
<a name="l00470"></a>00470 <span class="keywordflow">if</span>( ::close(_pipe[<a class="code" href="a00087.html#a2">PIPE_READ</a>]) !=0)
<a name="l00471"></a>00471 cerr<<<span class="stringliteral">"Failed to close pipe: "</span><<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00472"></a>00472
<a name="l00473"></a>00473 <span class="keywordflow">return</span> status;
<a name="l00474"></a>00474 }
<a name="l00475"></a>00475
<a name="l00476"></a>00476
<a name="l00477"></a><a class="code" href="a00045.html#d6">00477</a> <span class="keywordtype">void</span> <a class="code" href="a00045.html#d6">DaemonImpl::notifyParent</a>(<span class="keywordtype">int</span> status)
<a name="l00478"></a>00478 {
<a name="l00479"></a>00479 ssize_t r =::write(<a class="code" href="a00045.html#o3">_pipe</a>[<a class="code" href="a00087.html#a3">PIPE_WRITE</a>],&status,<span class="keyword">sizeof</span>(status));
<a name="l00480"></a>00480 <span class="keywordflow">if</span>(r<<span class="keyword">sizeof</span>(status))
<a name="l00481"></a>00481 {
<a name="l00482"></a>00482 <span class="keywordflow">if</span>(r<0)
<a name="l00483"></a>00483 cerr<<<span class="stringliteral">"read() failed while writing return value to pipe: "</span>
<a name="l00484"></a>00484 <<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00485"></a>00485 <span class="keywordflow">else</span>
<a name="l00486"></a>00486 cerr<<<span class="stringliteral">"write() too short while writing return value from pipe: "</span>
<a name="l00487"></a>00487 <<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00488"></a>00488 }
<a name="l00489"></a>00489 <span class="keywordflow">if</span>( ::close(_pipe[<a class="code" href="a00087.html#a3">PIPE_WRITE</a>]) !=0)
<a name="l00490"></a>00490 cerr<<<span class="stringliteral">"Failed to close pipe: "</span><<<a class="code" href="a00087.html#a1">STRERR_FILE_LINE</a><<endl;
<a name="l00491"></a>00491 }
<a name="l00492"></a>00492
<a name="l00493"></a>00493 } <span class="comment">// end namespace OmniEvents</span>
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Fri Aug 26 20:56:13 2005 for OmniEvents by
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