/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            miav_daemon.cc
 *
 *  Thu Jun  9 11:14:19 CEST 2005
 *  Copyright  2005 Bent Bisballe
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of MIaV.
 *
 *  MIaV 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.
 *
 *  MIaV 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 MIaV; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#include "miav_daemon.h"

#include <signal.h>
#include <errno.h>
#include <stdlib.h>

#include <hugin.hpp>
#include <config.h>

#include "miav_config.h"
#include "server.h"
#include "socket.h"

MiavDaemon::MiavDaemon(int port)
{
  this->port = port;
}

MiavDaemon::~MiavDaemon()
{}

int MiavDaemon::daemon_main()
{
  pid_t childpid; // variable to store the child's pid

  signal(SIGCLD, SIG_IGN);  // Ved SIGCHILD til IGNORE maa wait/waitpid ikke kaldes 
                            //   (ellers kommer der kernel-brok)
  
  INFO(miav, "Starting MIaV server v. %s", VERSION);
  INFO(miav, "Listening on port %d", port);
  Socket *socket = new Socket(port);

  if(socket->hasError()) {
    ERR(miav, "Listening socket has errors, quitting.");
    delete socket;
    return 1;
  }

  while(1) {
    Socket *csocket = new Socket(socket->slisten());

    if(socket->hasError()) {
      ERR(miav, "Server socket has errors, quitting.");
      delete csocket;
      break;
    }

    if(csocket->hasError()) {
      ERR(miav, "Child socket has errors, quitting.");
      delete csocket;
      break;
    }

    if(!csocket->isConnected()) {
      ERR(miav, "Child socket is not connected, quitting.");
      delete csocket;
      break;
    }

    childpid = fork();
      
    switch(childpid) {
    case -1: // fork() returns -1 on failure
      ERR(miav, "Fork error: %s", strerror(errno));
      exit(1);
    case 0: // fork() returns 0 to the child process
      delete socket; // Close listen socket.
      newConnection(csocket);
      delete csocket; // Close communication socket.
      exit(0);
      
    default: // fork() returns new pid to the parent process
      break;
    }
  }

  delete socket;
  return 0;
}