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SignalHandler.cpp
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SignalHandler.cpp
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/*
Copyright (C) 2012 Stefan Hajnoczi <stefanha@gmail.com>
Wahjam 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 2 of the License, or
(at your option) any later version.
Wahjam 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 Wahjam; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <errno.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <QCoreApplication>
#include "ninjamsrv.h"
#include "SignalHandler.h"
/* These need to be global since the signal handler has no instance pointer */
static int sigHupFds[2];
static int sigIntFds[2];
SignalHandler::SignalHandler(int argc_, char **argv_)
: argc(argc_), argv(argv_)
{
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sigHupFds) != 0) {
qFatal("socketpair failed %d", errno);
}
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sigIntFds) != 0) {
qFatal("socketpair failed %d", errno);
}
sigHupNotifier = new QSocketNotifier(sigHupFds[1], QSocketNotifier::Read, this);
connect(sigHupNotifier, SIGNAL(activated(int)), this, SLOT(onSigHup()));
sigIntNotifier = new QSocketNotifier(sigIntFds[1], QSocketNotifier::Read, this);
connect(sigIntNotifier, SIGNAL(activated(int)), this, SLOT(onSigInt()));
signal(SIGPIPE, SIG_IGN);
signal(SIGHUP, handleSigHup);
signal(SIGINT, handleSigInt);
}
SignalHandler::~SignalHandler()
{
signal(SIGPIPE, SIG_DFL);
signal(SIGHUP, SIG_DFL);
signal(SIGINT, SIG_DFL);
close(sigHupFds[0]);
close(sigHupFds[1]);
close(sigIntFds[0]);
close(sigIntFds[1]);
}
void SignalHandler::onSigHup()
{
sigHupNotifier->setEnabled(false);
char dummy;
read(sigHupFds[1], &dummy, sizeof(dummy));
reloadConfig(argc, argv, false);
sigHupNotifier->setEnabled(true);
}
void SignalHandler::onSigInt()
{
sigIntNotifier->setEnabled(false);
char dummy;
read(sigIntFds[1], &dummy, sizeof(dummy));
QCoreApplication::quit();
sigIntNotifier->setEnabled(true);
}
void SignalHandler::handleSigHup(int)
{
char dummy = 0;
write(sigHupFds[0], &dummy, sizeof(dummy));
}
void SignalHandler::handleSigInt(int)
{
char dummy = 0;
write(sigIntFds[0], &dummy, sizeof(dummy));
}