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<h1>HelperProcess.cpp</h1><a href="_helper_process_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment">** This file is part of Vidalia, and is subject to the license terms in the</span>
<a name="l00003"></a>00003 <span class="comment">** LICENSE file, found in the top level directory of this distribution. If you</span>
<a name="l00004"></a>00004 <span class="comment">** did not receive the LICENSE file with this file, you may obtain it from the</span>
<a name="l00005"></a>00005 <span class="comment">** Vidalia source package distributed by the Vidalia Project at</span>
<a name="l00006"></a>00006 <span class="comment">** http://www.vidalia-project.net/. No part of Vidalia, including this file,</span>
<a name="l00007"></a>00007 <span class="comment">** may be copied, modified, propagated, or distributed except according to the</span>
<a name="l00008"></a>00008 <span class="comment">** terms described in the LICENSE file.</span>
<a name="l00009"></a>00009 <span class="comment">*/</span>
<a name="l00010"></a>00010 <span class="comment">/*</span>
<a name="l00011"></a>00011 <span class="comment">** This file was originally written by Steven J. Murdoch, and </span>
<a name="l00012"></a>00012 <span class="comment">** modified by Matt Edman. It is distributed under the following</span>
<a name="l00013"></a>00013 <span class="comment">** license:</span>
<a name="l00014"></a>00014 <span class="comment">**</span>
<a name="l00015"></a>00015 <span class="comment">** Copyright (C) 2007, Matt Edman</span>
<a name="l00016"></a>00016 <span class="comment">** Copyright (C) 2007, Steven J. Murdoch </span>
<a name="l00017"></a>00017 <span class="comment">** <http://www.cl.cam.ac.uk/users/sjm217/></span>
<a name="l00018"></a>00018 <span class="comment">**</span>
<a name="l00019"></a>00019 <span class="comment">** This program is free software; you can redistribute it and/or</span>
<a name="l00020"></a>00020 <span class="comment">** modify it under the terms of the GNU General Public License</span>
<a name="l00021"></a>00021 <span class="comment">** as published by the Free Software Foundation; either version 2</span>
<a name="l00022"></a>00022 <span class="comment">** of the License, or (at your option) any later version.</span>
<a name="l00023"></a>00023 <span class="comment">**</span>
<a name="l00024"></a>00024 <span class="comment">** This program is distributed in the hope that it will be useful,</span>
<a name="l00025"></a>00025 <span class="comment">** but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00026"></a>00026 <span class="comment">** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<a name="l00027"></a>00027 <span class="comment">** GNU General Public License for more details.</span>
<a name="l00028"></a>00028 <span class="comment">**</span>
<a name="l00029"></a>00029 <span class="comment">** You should have received a copy of the GNU General Public License</span>
<a name="l00030"></a>00030 <span class="comment">** along with this program; if not, write to the Free Software</span>
<a name="l00031"></a>00031 <span class="comment">** Foundation, Inc., 51 Franklin Street, Fifth Floor, </span>
<a name="l00032"></a>00032 <span class="comment">** Boston, MA 02110-1301, USA.</span>
<a name="l00033"></a>00033 <span class="comment">*/</span>
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="comment">/*</span>
<a name="l00036"></a>00036 <span class="comment">** \file helperprocess.cpp</span>
<a name="l00037"></a>00037 <span class="comment">** \version $Id: HelperProcess.cpp 4132 2009-09-24 02:28:18Z edmanm $</span>
<a name="l00038"></a>00038 <span class="comment">** \brief Invokes a web browser process (originally by Steven. J. Murdoch)</span>
<a name="l00039"></a>00039 <span class="comment">*/</span>
<a name="l00040"></a>00040
<a name="l00041"></a>00041 <span class="preprocessor">#include "<a class="code" href="_helper_process_8h.html">HelperProcess.h</a>"</span>
<a name="l00042"></a>00042 <span class="preprocessor">#include "<a class="code" href="_vidalia_8h.html">Vidalia.h</a>"</span>
<a name="l00043"></a>00043
<a name="l00044"></a>00044 <span class="preprocessor">#include "<a class="code" href="stringutil_8h.html">stringutil.h</a>"</span>
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="preprocessor">#include <QString></span>
<a name="l00047"></a>00047 <span class="preprocessor">#include <QFileInfo></span>
<a name="l00048"></a>00048
<a name="l00049"></a>00049 <span class="comment"></span>
<a name="l00050"></a>00050 <span class="comment">/** Default constructor */</span>
<a name="l00051"></a><a class="code" href="class_helper_process.html#af5713dc6c5ea796d7b50146ca12f3a6b">00051</a> <a class="code" href="class_helper_process.html#af5713dc6c5ea796d7b50146ca12f3a6b">HelperProcess::HelperProcess</a>(QObject *parent)
<a name="l00052"></a>00052 : QProcess(parent)
<a name="l00053"></a>00053 {
<a name="l00054"></a>00054 <span class="comment">// Call error handling routine on errors</span>
<a name="l00055"></a>00055 QObject::connect(<span class="keyword">this</span>, SIGNAL(<a class="code" href="namespacetc.html#aa7353218fd7baef0876bbb422ce818af">error</a>(QProcess::ProcessError)),
<a name="l00056"></a>00056 <span class="keyword">this</span>, SLOT(<a class="code" href="class_helper_process.html#aef44c3f9dc399dbf502a87fa20802bff">onError</a>(QProcess::ProcessError)));
<a name="l00057"></a>00057
<a name="l00058"></a>00058 <span class="comment">// Call output handling routines on process output</span>
<a name="l00059"></a>00059 QObject::connect(<span class="keyword">this</span>, SIGNAL(readyReadStandardError()),
<a name="l00060"></a>00060 <span class="keyword">this</span>, SLOT(<a class="code" href="class_helper_process.html#abb8378484f7b2fd722808b9629a53904">onReadyReadStandardError</a>()));
<a name="l00061"></a>00061 QObject::connect(<span class="keyword">this</span>, SIGNAL(readyReadStandardOutput()),
<a name="l00062"></a>00062 <span class="keyword">this</span>, SLOT(<a class="code" href="class_helper_process.html#afcaebdfd208fa8f8f2556f85d33bbee5">onReadyReadStandardOutput</a>()));
<a name="l00063"></a>00063 }
<a name="l00064"></a>00064 <span class="comment"></span>
<a name="l00065"></a>00065 <span class="comment">/** Invoked when output is written to the process's stderr. */</span>
<a name="l00066"></a>00066 <span class="keywordtype">void</span>
<a name="l00067"></a><a class="code" href="class_helper_process.html#abb8378484f7b2fd722808b9629a53904">00067</a> <a class="code" href="class_helper_process.html#abb8378484f7b2fd722808b9629a53904">HelperProcess::onReadyReadStandardError</a>()
<a name="l00068"></a>00068 {
<a name="l00069"></a>00069 QString output = QString(readAllStandardError());
<a name="l00070"></a>00070 <span class="keywordflow">foreach</span> (QString line, output.split(<span class="stringliteral">"\n"</span>)) {
<a name="l00071"></a>00071 <a class="code" href="_vidalia_8h.html#a7743cb328f470aa8f382716fbcf61daa">vInfo</a>(<span class="stringliteral">"(%1:stderr): %2"</span>).arg(<a class="code" href="class_helper_process.html#a8a0c683a82f566febdd661a376c8923d">_processName</a>).arg(line);
<a name="l00072"></a>00072 }
<a name="l00073"></a>00073 }
<a name="l00074"></a>00074 <span class="comment"></span>
<a name="l00075"></a>00075 <span class="comment">/** Invoked when output is written to the process's stdout. */</span>
<a name="l00076"></a>00076 <span class="keywordtype">void</span>
<a name="l00077"></a><a class="code" href="class_helper_process.html#afcaebdfd208fa8f8f2556f85d33bbee5">00077</a> <a class="code" href="class_helper_process.html#afcaebdfd208fa8f8f2556f85d33bbee5">HelperProcess::onReadyReadStandardOutput</a>()
<a name="l00078"></a>00078 {
<a name="l00079"></a>00079 QString output = QString(readAllStandardOutput());
<a name="l00080"></a>00080 <span class="keywordflow">foreach</span> (QString line, output.split(<span class="stringliteral">"\n"</span>)) {
<a name="l00081"></a>00081 <a class="code" href="_vidalia_8h.html#a7743cb328f470aa8f382716fbcf61daa">vInfo</a>(<span class="stringliteral">"(%1:stdout): %2"</span>).arg(<a class="code" href="class_helper_process.html#a8a0c683a82f566febdd661a376c8923d">_processName</a>).arg(line);
<a name="l00082"></a>00082 }
<a name="l00083"></a>00083 }
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="keywordtype">void</span>
<a name="l00086"></a><a class="code" href="class_helper_process.html#ab6c6620186ec1929e35219fe98ee0b82">00086</a> <a class="code" href="class_helper_process.html#ab6c6620186ec1929e35219fe98ee0b82">HelperProcess::start</a>(<span class="keyword">const</span> QString &app, <span class="keyword">const</span> QString &args)
<a name="l00087"></a>00087 {
<a name="l00088"></a>00088 QFileInfo fi(app);
<a name="l00089"></a>00089 <a class="code" href="class_helper_process.html#a8a0c683a82f566febdd661a376c8923d">_processName</a> = fi.fileName();
<a name="l00090"></a>00090
<a name="l00091"></a>00091 QString commandLine = QString(<span class="stringliteral">"\"%1\" %2"</span>).arg(app).arg(args);
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="comment">// Log the process name and arguments</span>
<a name="l00094"></a>00094 <a class="code" href="_vidalia_8h.html#a61e4319b31bbbc7eb1a5724b487be75f">vNotice</a>(<span class="stringliteral">"Launching helper process with command line '%1'"</span>)
<a name="l00095"></a>00095 .arg(commandLine);
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <a class="code" href="class_helper_process.html#ab6c6620186ec1929e35219fe98ee0b82">QProcess::start</a>(commandLine, QIODevice::ReadOnly | QIODevice::Text);
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099 <span class="comment"></span>
<a name="l00100"></a>00100 <span class="comment">/** Start the specified application. */</span>
<a name="l00101"></a>00101 <span class="keywordtype">void</span>
<a name="l00102"></a><a class="code" href="class_helper_process.html#a9ed1a218c50975ea53bbb34fe9c36665">00102</a> <a class="code" href="class_helper_process.html#ab6c6620186ec1929e35219fe98ee0b82">HelperProcess::start</a>(<span class="keyword">const</span> QString &app, <span class="keyword">const</span> QStringList &args)
<a name="l00103"></a>00103 {
<a name="l00104"></a>00104 <span class="comment">// Remember the executable name of the process</span>
<a name="l00105"></a>00105 QFileInfo fi(app);
<a name="l00106"></a>00106 <a class="code" href="class_helper_process.html#a8a0c683a82f566febdd661a376c8923d">_processName</a> = fi.fileName();
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="comment">// Log the process name and arguments</span>
<a name="l00109"></a>00109 <a class="code" href="_vidalia_8h.html#a61e4319b31bbbc7eb1a5724b487be75f">vNotice</a>(<span class="stringliteral">"Launching helper process '%1' with arguments '%2'"</span>).arg(app)
<a name="l00110"></a>00110 .arg(<a class="code" href="stringutil_8cpp.html#ac226e398784e0eac1842837f552d740b">string_format_arguments</a>(args));
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="comment">// Start the specified application</span>
<a name="l00113"></a>00113 <a class="code" href="class_helper_process.html#ab6c6620186ec1929e35219fe98ee0b82">QProcess::start</a>(app, args, QIODevice::ReadOnly | QIODevice::Text);
<a name="l00114"></a>00114 }
<a name="l00115"></a>00115 <span class="comment"></span>
<a name="l00116"></a>00116 <span class="comment">/** Invoked when underlying QProcess fails. */</span>
<a name="l00117"></a>00117 <span class="keywordtype">void</span>
<a name="l00118"></a><a class="code" href="class_helper_process.html#aef44c3f9dc399dbf502a87fa20802bff">00118</a> <a class="code" href="class_helper_process.html#aef44c3f9dc399dbf502a87fa20802bff">HelperProcess::onError</a>(QProcess::ProcessError <a class="code" href="namespacetc.html#aa7353218fd7baef0876bbb422ce818af">error</a>)
<a name="l00119"></a>00119 {
<a name="l00120"></a>00120 <span class="comment">// Pass up error messages on startup, but ignore the rest</span>
<a name="l00121"></a>00121 <span class="keywordflow">if</span> (error == QProcess::FailedToStart) {
<a name="l00122"></a>00122 <a class="code" href="_vidalia_8h.html#a6d8c1ad992d06eece6f19b8246219779">vWarn</a>(<span class="stringliteral">"Helper process '%1' failed to start: %2"</span>).arg(<a class="code" href="class_helper_process.html#a8a0c683a82f566febdd661a376c8923d">_processName</a>)
<a name="l00123"></a>00123 .arg(errorString());
<a name="l00124"></a>00124 emit <a class="code" href="class_helper_process.html#a10657db83decca0d05538859cb4f8768">startFailed</a>(errorString());
<a name="l00125"></a>00125 }
<a name="l00126"></a>00126 }
<a name="l00127"></a>00127 <span class="comment"></span>
<a name="l00128"></a>00128 <span class="comment">/** Returns true iff process is not running. */</span>
<a name="l00129"></a>00129 <span class="keywordtype">bool</span>
<a name="l00130"></a><a class="code" href="class_helper_process.html#a05a44b514ed96838bba66523c9d5d4e6">00130</a> <a class="code" href="class_helper_process.html#a05a44b514ed96838bba66523c9d5d4e6">HelperProcess::isDone</a>()<span class="keyword"> const</span>
<a name="l00131"></a>00131 <span class="keyword"></span>{
<a name="l00132"></a>00132 <span class="keywordflow">return</span> state() == NotRunning;
<a name="l00133"></a>00133 }
<a name="l00134"></a>00134
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