Vidalia 0.2.10
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00001 /* 00002 ** This file is part of Vidalia, and is subject to the license terms in the 00003 ** LICENSE file, found in the top level directory of this distribution. If you 00004 ** did not receive the LICENSE file with this file, you may obtain it from the 00005 ** Vidalia source package distributed by the Vidalia Project at 00006 ** http://www.vidalia-project.net/. No part of Vidalia, including this file, 00007 ** may be copied, modified, propagated, or distributed except according to the 00008 ** terms described in the LICENSE file. 00009 */ 00010 /* 00011 ** This file was originally written by Steven J. Murdoch, and 00012 ** modified by Matt Edman. It is distributed under the following 00013 ** license: 00014 ** 00015 ** Copyright (C) 2007, Matt Edman 00016 ** Copyright (C) 2007, Steven J. Murdoch 00017 ** <http://www.cl.cam.ac.uk/users/sjm217/> 00018 ** 00019 ** This program is free software; you can redistribute it and/or 00020 ** modify it under the terms of the GNU General Public License 00021 ** as published by the Free Software Foundation; either version 2 00022 ** of the License, or (at your option) any later version. 00023 ** 00024 ** This program is distributed in the hope that it will be useful, 00025 ** but WITHOUT ANY WARRANTY; without even the implied warranty of 00026 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00027 ** GNU General Public License for more details. 00028 ** 00029 ** You should have received a copy of the GNU General Public License 00030 ** along with this program; if not, write to the Free Software 00031 ** Foundation, Inc., 51 Franklin Street, Fifth Floor, 00032 ** Boston, MA 02110-1301, USA. 00033 */ 00034 00035 /* 00036 ** \file helperprocess.cpp 00037 ** \version $Id: HelperProcess.cpp 4132 2009-09-24 02:28:18Z edmanm $ 00038 ** \brief Invokes a web browser process (originally by Steven. J. Murdoch) 00039 */ 00040 00041 #include "HelperProcess.h" 00042 #include "Vidalia.h" 00043 00044 #include "stringutil.h" 00045 00046 #include <QString> 00047 #include <QFileInfo> 00048 00049 00050 /** Default constructor */ 00051 HelperProcess::HelperProcess(QObject *parent) 00052 : QProcess(parent) 00053 { 00054 // Call error handling routine on errors 00055 QObject::connect(this, SIGNAL(error(QProcess::ProcessError)), 00056 this, SLOT(onError(QProcess::ProcessError))); 00057 00058 // Call output handling routines on process output 00059 QObject::connect(this, SIGNAL(readyReadStandardError()), 00060 this, SLOT(onReadyReadStandardError())); 00061 QObject::connect(this, SIGNAL(readyReadStandardOutput()), 00062 this, SLOT(onReadyReadStandardOutput())); 00063 } 00064 00065 /** Invoked when output is written to the process's stderr. */ 00066 void 00067 HelperProcess::onReadyReadStandardError() 00068 { 00069 QString output = QString(readAllStandardError()); 00070 foreach (QString line, output.split("\n")) { 00071 vInfo("(%1:stderr): %2").arg(_processName).arg(line); 00072 } 00073 } 00074 00075 /** Invoked when output is written to the process's stdout. */ 00076 void 00077 HelperProcess::onReadyReadStandardOutput() 00078 { 00079 QString output = QString(readAllStandardOutput()); 00080 foreach (QString line, output.split("\n")) { 00081 vInfo("(%1:stdout): %2").arg(_processName).arg(line); 00082 } 00083 } 00084 00085 void 00086 HelperProcess::start(const QString &app, const QString &args) 00087 { 00088 QFileInfo fi(app); 00089 _processName = fi.fileName(); 00090 00091 QString commandLine = QString("\"%1\" %2").arg(app).arg(args); 00092 00093 // Log the process name and arguments 00094 vNotice("Launching helper process with command line '%1'") 00095 .arg(commandLine); 00096 00097 QProcess::start(commandLine, QIODevice::ReadOnly | QIODevice::Text); 00098 } 00099 00100 /** Start the specified application. */ 00101 void 00102 HelperProcess::start(const QString &app, const QStringList &args) 00103 { 00104 // Remember the executable name of the process 00105 QFileInfo fi(app); 00106 _processName = fi.fileName(); 00107 00108 // Log the process name and arguments 00109 vNotice("Launching helper process '%1' with arguments '%2'").arg(app) 00110 .arg(string_format_arguments(args)); 00111 00112 // Start the specified application 00113 QProcess::start(app, args, QIODevice::ReadOnly | QIODevice::Text); 00114 } 00115 00116 /** Invoked when underlying QProcess fails. */ 00117 void 00118 HelperProcess::onError(QProcess::ProcessError error) 00119 { 00120 // Pass up error messages on startup, but ignore the rest 00121 if (error == QProcess::FailedToStart) { 00122 vWarn("Helper process '%1' failed to start: %2").arg(_processName) 00123 .arg(errorString()); 00124 emit startFailed(errorString()); 00125 } 00126 } 00127 00128 /** Returns true iff process is not running. */ 00129 bool 00130 HelperProcess::isDone() const 00131 { 00132 return state() == NotRunning; 00133 } 00134