77 lines
2 KiB
C++
77 lines
2 KiB
C++
/*
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* Squawk messenger.
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* Copyright (C) 2019 Yury Gubich <blue@macaw.me>
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*
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* This program 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 3 of the License, or
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* (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 "signalcatcher.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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int SignalCatcher::sigintFd[2] = {0,0};
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SignalCatcher::SignalCatcher(QCoreApplication *p_app, QObject *parent):
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QObject(parent),
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app(p_app)
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{
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if (::socketpair(AF_UNIX, SOCK_STREAM, 0, sigintFd))
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{
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qFatal("Couldn't create INT socketpair");
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}
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if (setup_unix_signal_handlers() != 0)
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{
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qFatal("Couldn't install unix handlers");
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}
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snInt = new QSocketNotifier(sigintFd[1], QSocketNotifier::Read, this);
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connect(snInt, &QSocketNotifier::activated, this, &SignalCatcher::handleSigInt);
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}
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SignalCatcher::~SignalCatcher()
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{}
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void SignalCatcher::handleSigInt()
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{
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snInt->setEnabled(false);
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char tmp;
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::read(sigintFd[1], &tmp, sizeof(tmp));
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app->quit();
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snInt->setEnabled(true);
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}
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void SignalCatcher::intSignalHandler(int unused)
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{
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char a = 1;
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::write(sigintFd[0], &a, sizeof(a));
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}
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int SignalCatcher::setup_unix_signal_handlers()
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{
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struct sigaction s_int;
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s_int.sa_handler = SignalCatcher::intSignalHandler;
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sigemptyset(&s_int.sa_mask);
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s_int.sa_flags = 0;
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s_int.sa_flags |= SA_RESTART;
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if (sigaction(SIGINT, &s_int, 0) > 0)
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return 1;
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return 0;
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}
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