100 lines
2.2 KiB
C++
100 lines
2.2 KiB
C++
/*
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Copyright 2013, 2015 Adam Reichold
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This file is part of qpdfview.
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qpdfview is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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qpdfview 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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You should have received a copy of the GNU General Public License
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along with qpdfview. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "signalhandler.h"
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#include <signal.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#include <QSocketNotifier>
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namespace qpdfview
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{
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int SignalHandler::s_sockets[2];
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bool SignalHandler::prepareSignals()
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{
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if(socketpair(AF_UNIX, SOCK_STREAM, 0, s_sockets) != 0)
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{
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return false;
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}
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struct sigaction sigAction;
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sigAction.sa_handler = SignalHandler::handleSignals;
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sigemptyset(&sigAction.sa_mask);
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sigAction.sa_flags = SA_RESTART;
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if(sigaction(SIGINT, &sigAction, 0) != 0)
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{
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close(s_sockets[0]);
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close(s_sockets[1]);
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return false;
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}
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if(sigaction(SIGTERM, &sigAction, 0) != 0)
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{
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close(s_sockets[0]);
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close(s_sockets[1]);
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return false;
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}
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return true;
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}
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SignalHandler::SignalHandler(QObject* parent) : QObject(parent),
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m_socketNotifier(0)
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{
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m_socketNotifier = new QSocketNotifier(s_sockets[1], QSocketNotifier::Read, this);
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connect(m_socketNotifier, SIGNAL(activated(int)), SLOT(on_socketNotifier_activated()));
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}
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void SignalHandler::on_socketNotifier_activated()
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{
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m_socketNotifier->setEnabled(false);
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int sigNumber = 0;
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Q_UNUSED(read(s_sockets[1], &sigNumber, sizeof(int)));
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switch(sigNumber)
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{
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case SIGINT:
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emit sigIntReceived();
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break;
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case SIGTERM:
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emit sigTermReceived();
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break;
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}
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m_socketNotifier->setEnabled(true);
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}
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void SignalHandler::handleSignals(int sigNumber)
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{
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Q_UNUSED(write(s_sockets[0], &sigNumber, sizeof(int)));
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}
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} // qpdfview
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