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/*
# Copyright (c) 2009 - OpenSLX Project, Computer Center University of Freiburg
#
# This program is free software distributed under the GPL version 2.
# See http://openslx.org/COPYING
#
# If you have any feedback please consult http://openslx.org/feedback and
# send your suggestions, praise, or complaints to feedback@openslx.org
#
# General information about OpenSLX can be found at http://openslx.org/
# --------------------------------------------------------------------------
# pvsPrivInputSignalHandler.h:
# - Handle signals forwarded over a file descriptor - interface
# --------------------------------------------------------------------------
*/
#ifndef PVSPRIVINPUTSIGNALHANDLER_H_
#define PVSPRIVINPUTSIGNALHANDLER_H_
#include <QObject>
/**
* Handle signals.
*
* This class reads \c int values from a file descriptor and dispatches sends
* Qt signals according to the \c SIG... value the integer represents.
* The purpose of this mechanism is to integrate (asynchronous) Unix signal
* handling into the synchronous event-driven Qt main loop. The main() function
* is expected to open a socket pair and install handlers for all relevant signals
* that simply write the number of the signal to that pipe.
*
* If allowUnauthenticatedKilling() has not been called, this class only accepts
* signal numbers that are sent by the same process.
*/
class PVSPrivInputSignalHandler : public QObject
{
Q_OBJECT
public:
PVSPrivInputSignalHandler(QObject* parent = 0)
: QObject(parent)
{
}
/** If \c value is \c true, allow sending signal numbers from other processes. */
void allowUnauthenticatedKilling(bool value)
{
_allowUnauthenticatedKilling = value;
}
public slots:
/** Connect this slot to a \c QSocketNotifier's \c activated(int) signal. */
void signalReceived(int sigfd);
signals:
/** SIGTERM */
void terminate();
/** SIGHUP */
void reloadConfiguration();
private:
bool _allowUnauthenticatedKilling;
};
#endif /* PVSPRIVINPUTSIGNALHANDLER_H_ */
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