gpidfile.h

Go to the documentation of this file.

//
// Copyright (C) 2001-2013 Graeme Walker <graeme_walker@users.sourceforge.net>
// 
// 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/>.
// ===

#ifndef G_PIDFILE_H
#define G_PIDFILE_H

#include "gdef.h"
#include "gexception.h"
#include "gsignalsafe.h"
#include "gpath.h"
#include <sys/types.h>
#include <string>

namespace G
{
        class PidFile ;
        class Daemon ;
}

class G::PidFile 
{
public:
        G_EXCEPTION( Error , "invalid pid file" ) ;

        static void cleanup( SignalSafe , const char * path ) ;

        explicit PidFile( const Path & pid_file_path ) ;

        PidFile() ;

        void init( const Path & pid_file_path ) ;

        ~PidFile() ;

        void commit() ;

        void check() ;

        Path path() const ;

private:
        Path m_path ;

private:
        PidFile( const PidFile & ) ; // not implemented
        void operator=( const PidFile & ) ; // not implemented
        static bool mine( SignalSafe , const char * path ) ; // reentrant
        static void create( const Path & pid_file ) ;
        bool valid() const ;
} ;

#endif