139 lines
4.6 KiB
C++
139 lines
4.6 KiB
C++
/*************************************************************************
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* Copyright (C) 2008 by Volker Lanz <vl@fidra.de> *
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* Copyright (C) 2016 by Andrius Štikonas <andrius@stikonas.eu> *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License as *
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* published by the Free Software Foundation; either version 3 of *
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* the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>.*
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*************************************************************************/
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#include "util/externalcommand.h"
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#include "util/report.h"
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#include <QtGlobal>
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#include <QString>
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#include <QStringList>
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#include <KLocalizedString>
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/** Creates a new ExternalCommand instance without Report.
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@param cmd the command to run
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@param args the arguments to pass to the command
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*/
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ExternalCommand::ExternalCommand(const QString& cmd, const QStringList& args, const QProcess::ProcessChannelMode processChannelMode) :
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QProcess(),
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m_Report(nullptr),
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m_Command(cmd),
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m_Args(args),
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m_ExitCode(-1),
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m_Output()
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{
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setup(processChannelMode);
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}
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/** Creates a new ExternalCommand instance with Report.
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@param report the Report to write output to.
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@param cmd the command to run
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@param args the arguments to pass to the command
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*/
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ExternalCommand::ExternalCommand(Report& report, const QString& cmd, const QStringList& args, const QProcess::ProcessChannelMode processChannelMode) :
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QProcess(),
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m_Report(report.newChild()),
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m_Command(cmd),
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m_Args(args),
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m_ExitCode(-1),
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m_Output()
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{
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setup(processChannelMode);
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}
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void ExternalCommand::setup(const QProcess::ProcessChannelMode processChannelMode)
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{
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setEnvironment(QStringList() << QStringLiteral("LC_ALL=C") << QStringLiteral("PATH=") + QString::fromLocal8Bit(getenv("PATH")) << QStringLiteral("LVM_SUPPRESS_FD_WARNINGS=1"));
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setProcessChannelMode(processChannelMode);
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connect(this, qOverload<int, QProcess::ExitStatus>(&QProcess::finished), this, &ExternalCommand::onFinished);
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connect(this, &ExternalCommand::readyReadStandardOutput, this, &ExternalCommand::onReadOutput);
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}
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/** Starts the external command.
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@param timeout timeout to wait for the process to start
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@return true on success
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*/
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bool ExternalCommand::start(int timeout)
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{
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QProcess::start(command(), args());
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if (report()) {
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report()->setCommand(xi18nc("@info:status", "Command: %1 %2", command(), args().join(QStringLiteral(" "))));
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}
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if (!waitForStarted(timeout))
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{
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if (report())
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report()->line() << xi18nc("@info:status", "(Command timeout while starting)");
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return false;
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}
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return true;
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}
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/** Waits for the external command to finish.
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@param timeout timeout to wait until the process finishes.
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@return true on success
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*/
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bool ExternalCommand::waitFor(int timeout)
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{
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closeWriteChannel();
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if (!waitForFinished(timeout)) {
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if (report())
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report()->line() << xi18nc("@info:status", "(Command timeout while running)");
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return false;
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}
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onReadOutput();
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return true;
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}
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/** Runs the command.
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@param timeout timeout to use for waiting when starting and when waiting for the process to finish
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@return true on success
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*/
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bool ExternalCommand::run(int timeout)
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{
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return start(timeout) && waitFor(timeout) && exitStatus() == 0;
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}
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void ExternalCommand::onReadOutput()
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{
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const QByteArray s = readAllStandardOutput();
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if(m_Output.length() > 10*1024*1024) { // prevent memory overflow for badly corrupted file systems
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if (report())
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report()->line() << xi18nc("@info:status", "(Command is printing too much output)");
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return;
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}
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m_Output += s;
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if (report())
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*report() << QString::fromLocal8Bit(s);
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}
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void ExternalCommand::onFinished(int exitCode, QProcess::ExitStatus exitStatus)
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{
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Q_UNUSED(exitStatus)
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setExitCode(exitCode);
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}
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