55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
#include "core/signalhandler.h"
|
|
|
|
#include <assert.h>
|
|
#include <fcntl.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
#include <sys/signalfd.h>
|
|
#include <unistd.h>
|
|
|
|
#include <QByteArray>
|
|
#include <QSocketNotifier>
|
|
|
|
#include "core/logging.h"
|
|
|
|
SignalHandler::SignalHandler(QObject* parent)
|
|
: QObject(parent) {
|
|
sigset_t mask;
|
|
memset(&mask, 0, sizeof(mask));
|
|
sigemptyset(&mask);
|
|
sigaddset(&mask, SIGUSR1);
|
|
// Listen to the handled signals in a file descriptor.
|
|
const int fd = signalfd(-1, &mask, SFD_NONBLOCK | SFD_CLOEXEC);
|
|
if (fd == -1) {
|
|
perror(Q_FUNC_INFO);
|
|
qLog(Fatal) << "Failed to register signal handler with signalfd()";
|
|
}
|
|
notifier_ = new QSocketNotifier(fd, QSocketNotifier::Read, this);
|
|
connect(notifier_, SIGNAL(activated(int)), SLOT(SignalReceived()));
|
|
}
|
|
|
|
void SignalHandler::SignalReceived() {
|
|
qLog(Debug) << Q_FUNC_INFO;
|
|
QByteArray buffer(sizeof(signalfd_siginfo), 0);
|
|
// read() should fail with EAGAIN if there are no more signals.
|
|
forever {
|
|
int bytes_read = read(notifier_->socket(), buffer.data(), buffer.size());
|
|
if (bytes_read == buffer.size()) {
|
|
signalfd_siginfo* siginfo =
|
|
reinterpret_cast<signalfd_siginfo*>(buffer.data());
|
|
qLog(Debug) << Q_FUNC_INFO
|
|
<< siginfo->ssi_signo << strsignal(siginfo->ssi_signo);;
|
|
switch (siginfo->ssi_signo) {
|
|
case SIGUSR1:
|
|
emit SIG_USR1();
|
|
break;
|
|
// Add more signals here.
|
|
default:
|
|
break;
|
|
}
|
|
} else if (bytes_read <= 0) {
|
|
break;
|
|
}
|
|
}
|
|
}
|