Desktop Qt based XMPP messenger
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/*
* Squawk messenger.
* Copyright (C) 2019 Yury Gubich <blue@macaw.me>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "signalcatcher.h"
#include <signal.h>
#include <sys/socket.h>
#include <unistd.h>
int SignalCatcher::sigintFd[2] = {0,0};
SignalCatcher::SignalCatcher(QCoreApplication *p_app, QObject *parent):
QObject(parent),
app(p_app)
{
if (::socketpair(AF_UNIX, SOCK_STREAM, 0, sigintFd))
{
qFatal("Couldn't create INT socketpair");
}
if (setup_unix_signal_handlers() != 0)
{
qFatal("Couldn't install unix handlers");
}
snInt = new QSocketNotifier(sigintFd[1], QSocketNotifier::Read, this);
connect(snInt, &QSocketNotifier::activated, this, &SignalCatcher::handleSigInt);
}
SignalCatcher::~SignalCatcher()
{}
void SignalCatcher::handleSigInt()
{
snInt->setEnabled(false);
char tmp;
ssize_t s = ::read(sigintFd[1], &tmp, sizeof(tmp));
app->quit();
snInt->setEnabled(true);
}
void SignalCatcher::intSignalHandler(int unused)
{
char a = 1;
ssize_t s = ::write(sigintFd[0], &a, sizeof(a));
}
int SignalCatcher::setup_unix_signal_handlers()
{
struct sigaction s_int;
s_int.sa_handler = SignalCatcher::intSignalHandler;
sigemptyset(&s_int.sa_mask);
s_int.sa_flags = 0;
s_int.sa_flags |= SA_RESTART;
if (sigaction(SIGINT, &s_int, 0) > 0)
return 1;
return 0;
}