2 * This file is part of the PulseView project.
4 * Copyright (C) 2013 Adam Reichold
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "signalhandler.hpp"
26 #include <sys/socket.h>
30 #include <QSocketNotifier>
32 int SignalHandler::sockets_[2];
34 bool SignalHandler::prepare_signals()
36 if (socketpair(AF_UNIX, SOCK_STREAM, 0, sockets_) != 0)
39 struct sigaction sig_action;
41 sig_action.sa_handler = SignalHandler::handle_signals;
42 sigemptyset(&sig_action.sa_mask);
43 sig_action.sa_flags = SA_RESTART;
45 if (sigaction(SIGINT, &sig_action, 0) != 0 ||
46 sigaction(SIGTERM, &sig_action, 0) != 0) {
55 SignalHandler::SignalHandler(QObject* parent) : QObject(parent),
58 socket_notifier_ = new QSocketNotifier(sockets_[1],
59 QSocketNotifier::Read, this);
60 connect(socket_notifier_, SIGNAL(activated(int)),
61 SLOT(on_socket_notifier_activated()));
64 void SignalHandler::on_socket_notifier_activated()
66 socket_notifier_->setEnabled(false);
69 if (read(sockets_[1], &sig_number, sizeof(int)) != sizeof(int)) {
70 qDebug() << "Failed to catch signal";
77 Q_EMIT int_received();
80 Q_EMIT term_received();
84 socket_notifier_->setEnabled(true);
87 void SignalHandler::handle_signals(int sig_number)
89 if (write(sockets_[0], &sig_number, sizeof(int)) != sizeof(int)) {
90 // Failed to handle signal