PidFile.h

/*
** libutil++
** $Id: PidFile.h 1653 2016-02-28 19:54:59Z sella $
** Copyright (c) 2011-2016 Digital Genesis, LLC. All Rights Reserved.
** Released under the LGPL Version 2.1 License.
** http://www.digitalgenesis.com
*/

#ifndef __libutilxx__sella__util__PidFile_H__
#define __libutilxx__sella__util__PidFile_H__

#include "../../common.h"
#include "PidFileException.h"

#include <unistd.h>
#include <sys/types.h>

#include <string>
#include <memory>

namespace sella {
        namespace util {
                class PidFile;
        }
}

class sella::util::PidFile {
        public:
                typedef std::shared_ptr<PidFile> shared;
                typedef PidFile* ptr;

        public:
                PidFile(const std::string &file, uid_t uid = -1, gid_t gid = -1) throw ();
                PidFile(const PidFile &other);
                virtual ~PidFile();

                PidFile& operator=(const PidFile &other) throw ();
                bool operator==(const PidFile &other) const throw () = delete;
                bool operator!=(const PidFile &other) const throw () = delete;

                const std::string& get(void) const throw (); /* Get filename */
                int read(void) const throw (PidFileException); /* Read pid from file */
                int write(void) const throw (PidFileException); /* Write pid to file */
                void remove(void) const throw (PidFileException); /* Remove file */

                bool isOwner(void) const throw (); /* Check if we're the file owner */
                bool isLive(void) const throw (); /* Check if the file owner is live/running */
                bool isFile(void) const throw (); /* Check if there is a file */

                static const PidFile::shared shared_ptr(const std::string &file, uid_t uid = -1, gid_t gid = -1) throw ();

        private:
                std::string file;
                uid_t uid;
                gid_t gid;
};

#endif

/*
** vim: noet ts=3 sw=3
*/