/usr/include/libktorrent/util/signalcatcher.h is in libktorrent-dev 1.3.1-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2010 by Joris Guisson *
* joris.guisson@gmail.com *
* *
* 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 2 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, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef BT_SIGNALCATCHER_H
#define BT_SIGNALCATCHER_H
#ifndef Q_WS_WIN
#include <ktorrent_export.h>
#include <signal.h>
#include <setjmp.h>
#include <QObject>
#include <QSocketNotifier>
#include <util/error.h>
namespace bt
{
/**
Variable used to jump from the SIGBUS handler back to the place which triggered the SIGBUS.
*/
extern KTORRENT_EXPORT sigjmp_buf sigbus_env;
/**
* Protects against SIGBUS errors when doing mmapped IO
**/
class KTORRENT_EXPORT BusErrorGuard
{
public:
BusErrorGuard();
virtual ~BusErrorGuard();
};
/**
Exception throw when a SIGBUS is caught.
*/
class KTORRENT_EXPORT BusError : public bt::Error
{
public:
BusError(bool write_operation);
virtual ~BusError();
/// Wether or not the SIGBUS was triggered by a write operation
bool write_operation;
};
/**
* Class to handle UNIX signals (not Qt ones)
*/
class KTORRENT_EXPORT SignalCatcher : public QObject
{
Q_OBJECT
public:
SignalCatcher(QObject* parent = 0);
virtual ~SignalCatcher();
/**
* Catch a UNIX signal
* @param sig SIGINT, SIGTERM or some other signal
* @return true upon success, false otherwise
**/
bool catchSignal(int sig);
private slots:
void handleInput(int fd);
private:
static void signalHandler(int sig, siginfo_t *siginfo, void *ptr);
signals:
/// Emitted when a
void triggered();
private:
QSocketNotifier* notifier;
static int signal_received_pipe[2];
};
}
/// Before writing to memory mapped data, call this macro to ensure that SIGBUS signals are caught and properly dealt with
#define BUS_ERROR_WPROTECT() BusErrorGuard bus_error_guard; if (sigsetjmp(bt::sigbus_env, 1)) throw bt::BusError(true)
/// Before reading from memory mapped data, call this macro to ensure that SIGBUS signals are caught and properly dealt with
#define BUS_ERROR_RPROTECT() BusErrorGuard bus_error_guard; if (sigsetjmp(bt::sigbus_env, 1)) throw bt::BusError(false)
#endif
#endif // BT_SIGNALCATCHER_H
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