Vidalia 0.2.12
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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 ** \brief Invokes a web browser process (originally by Steven. J. Murdoch) 00038 */ 00039 00040 #include "HelperProcess.h" 00041 #include "Vidalia.h" 00042 00043 #include "stringutil.h" 00044 00045 #include <QString> 00046 #include <QFileInfo> 00047 00048 00049 /** Default constructor */ 00050 HelperProcess::HelperProcess(QObject *parent) 00051 : QProcess(parent) 00052 { 00053 // Call error handling routine on errors 00054 QObject::connect(this, SIGNAL(error(QProcess::ProcessError)), 00055 this, SLOT(onError(QProcess::ProcessError))); 00056 00057 // Call output handling routines on process output 00058 QObject::connect(this, SIGNAL(readyReadStandardError()), 00059 this, SLOT(onReadyReadStandardError())); 00060 QObject::connect(this, SIGNAL(readyReadStandardOutput()), 00061 this, SLOT(onReadyReadStandardOutput())); 00062 } 00063 00064 /** Invoked when output is written to the process's stderr. */ 00065 void 00066 HelperProcess::onReadyReadStandardError() 00067 { 00068 QString output = QString(readAllStandardError()); 00069 foreach (QString line, output.split("\n")) { 00070 vInfo("(%1:stderr): %2").arg(_processName).arg(line); 00071 } 00072 } 00073 00074 /** Invoked when output is written to the process's stdout. */ 00075 void 00076 HelperProcess::onReadyReadStandardOutput() 00077 { 00078 QString output = QString(readAllStandardOutput()); 00079 foreach (QString line, output.split("\n")) { 00080 vInfo("(%1:stdout): %2").arg(_processName).arg(line); 00081 } 00082 } 00083 00084 void 00085 HelperProcess::start(const QString &app, const QString &args) 00086 { 00087 QFileInfo fi(app); 00088 _processName = fi.fileName(); 00089 00090 QString commandLine = QString("\"%1\" %2").arg(app).arg(args); 00091 00092 // Log the process name and arguments 00093 vNotice("Launching helper process with command line '%1'") 00094 .arg(commandLine); 00095 00096 QProcess::start(commandLine, QIODevice::ReadOnly | QIODevice::Text); 00097 } 00098 00099 /** Start the specified application. */ 00100 void 00101 HelperProcess::start(const QString &app, const QStringList &args) 00102 { 00103 // Remember the executable name of the process 00104 QFileInfo fi(app); 00105 _processName = fi.fileName(); 00106 00107 // Log the process name and arguments 00108 vNotice("Launching helper process '%1' with arguments '%2'").arg(app) 00109 .arg(string_format_arguments(args)); 00110 00111 // Start the specified application 00112 QProcess::start(app, args, QIODevice::ReadOnly | QIODevice::Text); 00113 } 00114 00115 /** Invoked when underlying QProcess fails. */ 00116 void 00117 HelperProcess::onError(QProcess::ProcessError error) 00118 { 00119 // Pass up error messages on startup, but ignore the rest 00120 if (error == QProcess::FailedToStart) { 00121 vWarn("Helper process '%1' failed to start: %2").arg(_processName) 00122 .arg(errorString()); 00123 emit startFailed(errorString()); 00124 } 00125 } 00126 00127 /** Returns true iff process is not running. */ 00128 bool 00129 HelperProcess::isDone() const 00130 { 00131 return state() == NotRunning; 00132 } 00133